diff options
35 files changed, 2408 insertions, 1684 deletions
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c index e6e0d98..39a54a0 100644 --- a/fs/ext4/acl.c +++ b/fs/ext4/acl.c @@ -324,8 +324,8 @@ ext4_acl_chmod(struct inode *inode) if (error) return error; retry: - handle = ext4_journal_start(inode, - EXT4_DATA_TRANS_BLOCKS(inode->i_sb)); + handle = ext4_journal_start(inode, EXT4_HT_XATTR, + ext4_jbd2_credits_xattr(inode)); if (IS_ERR(handle)) { error = PTR_ERR(handle); ext4_std_error(inode->i_sb, error); @@ -422,7 +422,8 @@ ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value, acl = NULL; retry: - handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb)); + handle = ext4_journal_start(inode, EXT4_HT_XATTR, + ext4_jbd2_credits_xattr(inode)); if (IS_ERR(handle)) { error = PTR_ERR(handle); goto release_and_out; diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index cf18217..2f2e0da 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -358,7 +358,7 @@ void ext4_validate_block_bitmap(struct super_block *sb, } /** - * ext4_read_block_bitmap() + * ext4_read_block_bitmap_nowait() * @sb: super block * @block_group: given block group * @@ -457,6 +457,8 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group) struct buffer_head *bh; bh = ext4_read_block_bitmap_nowait(sb, block_group); + if (!bh) + return NULL; if (ext4_wait_block_bitmap(sb, block_group, bh)) { put_bh(bh); return NULL; @@ -482,11 +484,16 @@ static int ext4_has_free_clusters(struct ext4_sb_info *sbi, free_clusters = percpu_counter_read_positive(fcc); dirty_clusters = percpu_counter_read_positive(dcc); - root_clusters = EXT4_B2C(sbi, ext4_r_blocks_count(sbi->s_es)); + + /* + * r_blocks_count should always be multiple of the cluster ratio so + * we are safe to do a plane bit shift only. + */ + root_clusters = ext4_r_blocks_count(sbi->s_es) >> sbi->s_cluster_bits; if (free_clusters - (nclusters + root_clusters + dirty_clusters) < EXT4_FREECLUSTERS_WATERMARK) { - free_clusters = EXT4_C2B(sbi, percpu_counter_sum_positive(fcc)); + free_clusters = percpu_counter_sum_positive(fcc); dirty_clusters = percpu_counter_sum_positive(dcc); } /* Check whether we have space after accounting for current diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 80a28b2..3882fbc 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -185,6 +185,7 @@ static int ext4_readdir(struct file *filp, "at offset %llu", (unsigned long long)filp->f_pos); filp->f_pos += sb->s_blocksize - offset; + brelse(bh); continue; } set_buffer_verified(bh); diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 8462eb3..6e16c18 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -194,8 +194,7 @@ struct mpage_da_data { */ #define EXT4_IO_END_UNWRITTEN 0x0001 #define EXT4_IO_END_ERROR 0x0002 -#define EXT4_IO_END_QUEUED 0x0004 -#define EXT4_IO_END_DIRECT 0x0008 +#define EXT4_IO_END_DIRECT 0x0004 struct ext4_io_page { struct page *p_page; @@ -215,10 +214,8 @@ typedef struct ext4_io_end { struct list_head list; /* per-file finished IO list */ struct inode *inode; /* file being written to */ unsigned int flag; /* unwritten or not */ - struct page *page; /* for writepage() path */ loff_t offset; /* offset in the file */ ssize_t size; /* size of the extent */ - struct work_struct work; /* data work queue */ struct kiocb *iocb; /* iocb struct for AIO */ int result; /* error value for AIO */ int num_io_pages; /* for writepages() */ @@ -582,6 +579,8 @@ enum { #define EXT4_GET_BLOCKS_KEEP_SIZE 0x0080 /* Do not take i_data_sem locking in ext4_map_blocks */ #define EXT4_GET_BLOCKS_NO_LOCK 0x0100 + /* Do not put hole in extent cache */ +#define EXT4_GET_BLOCKS_NO_PUT_HOLE 0x0200 /* * Flags used by ext4_free_blocks @@ -810,17 +809,6 @@ do { \ #endif /* defined(__KERNEL__) || defined(__linux__) */ -/* - * storage for cached extent - * If ec_len == 0, then the cache is invalid. - * If ec_start == 0, then the cache represents a gap (null mapping) - */ -struct ext4_ext_cache { - ext4_fsblk_t ec_start; - ext4_lblk_t ec_block; - __u32 ec_len; /* must be 32bit to return holes */ -}; - #include "extents_status.h" /* @@ -887,7 +875,6 @@ struct ext4_inode_info { struct inode vfs_inode; struct jbd2_inode *jinode; - struct ext4_ext_cache i_cached_extent; /* * File creation time. Its function is same as that of * struct timespec i_{a,c,m}time in the generic inode. @@ -901,6 +888,8 @@ struct ext4_inode_info { /* extents status tree */ struct ext4_es_tree i_es_tree; rwlock_t i_es_lock; + struct list_head i_es_lru; + unsigned int i_es_lru_nr; /* protected by i_es_lock */ /* ialloc */ ext4_group_t i_last_alloc_group; @@ -930,6 +919,7 @@ struct ext4_inode_info { spinlock_t i_completed_io_lock; atomic_t i_ioend_count; /* Number of outstanding io_end structs */ atomic_t i_unwritten; /* Nr. of inflight conversions pending */ + struct work_struct i_unwritten_work; /* deferred extent conversion */ spinlock_t i_block_reservation_lock; @@ -985,7 +975,6 @@ struct ext4_inode_info { #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ -#define EXT4_MOUNT_MBLK_IO_SUBMIT 0x4000000 /* multi-block io submits */ #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ @@ -1316,6 +1305,11 @@ struct ext4_sb_info { /* Precomputed FS UUID checksum for seeding other checksums */ __u32 s_csum_seed; + + /* Reclaim extents from extent status tree */ + struct shrinker s_es_shrinker; + struct list_head s_es_lru; + spinlock_t s_es_lru_lock ____cacheline_aligned_in_smp; }; static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) @@ -2007,9 +2001,20 @@ extern int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo); /* ialloc.c */ -extern struct inode *ext4_new_inode(handle_t *, struct inode *, umode_t, - const struct qstr *qstr, __u32 goal, - uid_t *owner); +extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t, + const struct qstr *qstr, __u32 goal, + uid_t *owner, int handle_type, + unsigned int line_no, int nblocks); + +#define ext4_new_inode(handle, dir, mode, qstr, goal, owner) \ + __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \ + 0, 0, 0) +#define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \ + type, nblocks) \ + __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \ + (type), __LINE__, (nblocks)) + + extern void ext4_free_inode(handle_t *, struct inode *); extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); extern unsigned long ext4_count_free_inodes(struct super_block *); @@ -2103,6 +2108,7 @@ extern ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb, extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock); extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks, int chunk); extern void ext4_ind_truncate(struct inode *inode); +extern int ext4_ind_punch_hole(struct file *file, loff_t offset, loff_t length); /* ioctl.c */ extern long ext4_ioctl(struct file *, unsigned int, unsigned long); @@ -2151,6 +2157,8 @@ extern void *ext4_kvzalloc(size_t size, gfp_t flags); extern void ext4_kvfree(void *ptr); extern int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup); +extern const char *ext4_decode_error(struct super_block *sb, int errno, + char nbuf[16]); extern __printf(4, 5) void __ext4_error(struct super_block *, const char *, unsigned int, const char *, ...); @@ -2227,6 +2235,8 @@ extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group, struct ext4_group_desc *gdp); extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, struct ext4_group_desc *gdp); +extern int ext4_register_li_request(struct super_block *sb, + ext4_group_t first_not_zeroed); static inline int ext4_has_group_desc_csum(struct super_block *sb) { @@ -2454,6 +2464,75 @@ extern const struct file_operations ext4_file_operations; extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); extern void ext4_unwritten_wait(struct inode *inode); +/* inline.c */ +extern int ext4_has_inline_data(struct inode *inode); +extern int ext4_get_inline_size(struct inode *inode); +extern int ext4_get_max_inline_size(struct inode *inode); +extern int ext4_find_inline_data_nolock(struct inode *inode); +extern void ext4_write_inline_data(struct inode *inode, + struct ext4_iloc *iloc, + void *buffer, loff_t pos, + unsigned int len); +extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode, + unsigned int len); +extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, + unsigned int len); +extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); + +extern int ext4_readpage_inline(struct inode *inode, struct page *page); +extern int ext4_try_to_write_inline_data(struct address_space *mapping, + struct inode *inode, + loff_t pos, unsigned len, + unsigned flags, + struct page **pagep); +extern int ext4_write_inline_data_end(struct inode *inode, + loff_t pos, unsigned len, + unsigned copied, + struct page *page); +extern struct buffer_head * +ext4_journalled_write_inline_data(struct inode *inode, + unsigned len, + struct page *page); +extern int ext4_da_write_inline_data_begin(struct address_space *mapping, + struct inode *inode, + loff_t pos, unsigned len, + unsigned flags, + struct page **pagep, + void **fsdata); +extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, + unsigned len, unsigned copied, + struct page *page); +extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry, + struct inode *inode); +extern int ext4_try_create_inline_dir(handle_t *handle, + struct inode *parent, + struct inode *inode); +extern int ext4_read_inline_dir(struct file *filp, + void *dirent, filldir_t filldir, + int *has_inline_data); +extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, + const struct qstr *d_name, + struct ext4_dir_entry_2 **res_dir, + int *has_inline_data); +extern int ext4_delete_inline_entry(handle_t *handle, + struct inode *dir, + struct ext4_dir_entry_2 *de_del, + struct buffer_head *bh, + int *has_inline_data); +extern int empty_inline_dir(struct inode *dir, int *has_inline_data); +extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, + struct ext4_dir_entry_2 **parent_de, + int *retval); +extern int ext4_inline_data_fiemap(struct inode *inode, + struct fiemap_extent_info *fieinfo, + int *has_inline); +extern int ext4_try_to_evict_inline_data(handle_t *handle, + struct inode *inode, + int needed); +extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline); + +extern int ext4_convert_inline_data(struct inode *inode); + /* namei.c */ extern const struct inode_operations ext4_dir_inode_operations; extern const struct inode_operations ext4_special_inode_operations; @@ -2520,6 +2599,9 @@ extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t, struct ext4_ext_path *); extern void ext4_ext_drop_refs(struct ext4_ext_path *); extern int ext4_ext_check_inode(struct inode *inode); +extern int ext4_find_delalloc_range(struct inode *inode, + ext4_lblk_t lblk_start, + ext4_lblk_t lblk_end); extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk); extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len); @@ -2537,6 +2619,7 @@ extern void ext4_exit_pageio(void); extern void ext4_ioend_wait(struct inode *); extern void ext4_free_io_end(ext4_io_end_t *io); extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); +extern void ext4_end_io_work(struct work_struct *work); extern void ext4_io_submit(struct ext4_io_submit *io); extern int ext4_bio_write_page(struct ext4_io_submit *io, struct page *page, diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h index 487fda1..8643ff5 100644 --- a/fs/ext4/ext4_extents.h +++ b/fs/ext4/ext4_extents.h @@ -193,12 +193,6 @@ static inline unsigned short ext_depth(struct inode *inode) return le16_to_cpu(ext_inode_hdr(inode)->eh_depth); } -static inline void -ext4_ext_invalidate_cache(struct inode *inode) -{ - EXT4_I(inode)->i_cached_extent.ec_len = 0; -} - static inline void ext4_ext_mark_uninitialized(struct ext4_extent *ext) { /* We can not have an uninitialized extent of zero length! */ diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c index b4323ba..7058975 100644 --- a/fs/ext4/ext4_jbd2.c +++ b/fs/ext4/ext4_jbd2.c @@ -6,6 +6,108 @@ #include <trace/events/ext4.h> +/* Just increment the non-pointer handle value */ +static handle_t *ext4_get_nojournal(void) +{ + handle_t *handle = current->journal_info; + unsigned long ref_cnt = (unsigned long)handle; + + BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); + + ref_cnt++; + handle = (handle_t *)ref_cnt; + + current->journal_info = handle; + return handle; +} + + +/* Decrement the non-pointer handle value */ +static void ext4_put_nojournal(handle_t *handle) +{ + unsigned long ref_cnt = (unsigned long)handle; + + BUG_ON(ref_cnt == 0); + + ref_cnt--; + handle = (handle_t *)ref_cnt; + + current->journal_info = handle; +} + +/* + * Wrappers for jbd2_journal_start/end. + */ +handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line, + int type, int nblocks) +{ + journal_t *journal; + + trace_ext4_journal_start(sb, nblocks, _RET_IP_); + if (sb->s_flags & MS_RDONLY) + return ERR_PTR(-EROFS); + + WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE); + journal = EXT4_SB(sb)->s_journal; + if (!journal) + return ext4_get_nojournal(); + /* + * Special case here: if the journal has aborted behind our + * backs (eg. EIO in the commit thread), then we still need to + * take the FS itself readonly cleanly. + */ + if (is_journal_aborted(journal)) { + ext4_abort(sb, "Detected aborted journal"); + return ERR_PTR(-EROFS); + } + return jbd2__journal_start(journal, nblocks, GFP_NOFS, type, line); +} + +int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) +{ + struct super_block *sb; + int err; + int rc; + + if (!ext4_handle_valid(handle)) { + ext4_put_nojournal(handle); + return 0; + } + sb = handle->h_transaction->t_journal->j_private; + err = handle->h_err; + rc = jbd2_journal_stop(handle); + + if (!err) + err = rc; + if (err) + __ext4_std_error(sb, where, line, err); + return err; +} + +void ext4_journal_abort_handle(const char *caller, unsigned int line, + const char *err_fn, struct buffer_head *bh, + handle_t *handle, int err) +{ + char nbuf[16]; + const char *errstr = ext4_decode_error(NULL, err, nbuf); + + BUG_ON(!ext4_handle_valid(handle)); + + if (bh) + BUFFER_TRACE(bh, "abort"); + + if (!handle->h_err) + handle->h_err = err; + + if (is_handle_aborted(handle)) + return; + + printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n", + caller, line, errstr, err_fn); + + jbd2_journal_abort_handle(handle); +} + int __ext4_journal_get_write_access(const char *where, unsigned int line, handle_t *handle, struct buffer_head *bh) { diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h index 7177f9b..4c216b1 100644 --- a/fs/ext4/ext4_jbd2.h +++ b/fs/ext4/ext4_jbd2.h @@ -59,12 +59,6 @@ #define EXT4_META_TRANS_BLOCKS(sb) (EXT4_XATTR_TRANS_BLOCKS + \ EXT4_MAXQUOTAS_TRANS_BLOCKS(sb)) -/* Delete operations potentially hit one directory's namespace plus an - * entire inode, plus arbitrary amounts of bitmap/indirection data. Be - * generous. We can grow the delete transaction later if necessary. */ - -#define EXT4_DELETE_TRANS_BLOCKS(sb) (2 * EXT4_DATA_TRANS_BLOCKS(sb) + 64) - /* Define an arbitrary limit for the amount of data we will anticipate * writing to any given transaction. For unbounded transactions such as * write(2) and truncate(2) we can write more than this, but we always @@ -110,6 +104,36 @@ #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb)) #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb)) +static inline int ext4_jbd2_credits_xattr(struct inode *inode) +{ + int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb); + + /* + * In case of inline data, we may push out the data to a block, + * so we need to reserve credits for this eventuality + */ + if (ext4_has_inline_data(inode)) + credits += ext4_writepage_trans_blocks(inode) + 1; + return credits; +} + + +/* + * Ext4 handle operation types -- for logging purposes + */ +#define EXT4_HT_MISC 0 +#define EXT4_HT_INODE 1 +#define EXT4_HT_WRITE_PAGE 2 +#define EXT4_HT_MAP_BLOCKS 3 +#define EXT4_HT_DIR 4 +#define EXT4_HT_TRUNCATE 5 +#define EXT4_HT_QUOTA 6 +#define EXT4_HT_RESIZE 7 +#define EXT4_HT_MIGRATE 8 +#define EXT4_HT_MOVE_EXTENTS 9 +#define EXT4_HT_XATTR 10 +#define EXT4_HT_MAX 11 + /** * struct ext4_journal_cb_entry - Base structure for callback information. * @@ -234,7 +258,8 @@ int __ext4_handle_dirty_super(const char *where, unsigned int line, #define ext4_handle_dirty_super(handle, sb) \ __ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb)) -handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks); +handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line, + int type, int nblocks); int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle); #define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096) @@ -268,9 +293,17 @@ static inline int ext4_handle_has_enough_credits(handle_t *handle, int needed) return 1; } -static inline handle_t *ext4_journal_start(struct inode *inode, int nblocks) +#define ext4_journal_start_sb(sb, type, nblocks) \ + __ext4_journal_start_sb((sb), __LINE__, (type), (nblocks)) + +#define ext4_journal_start(inode, type, nblocks) \ + __ext4_journal_start((inode), __LINE__, (type), (nblocks)) + +static inline handle_t *__ext4_journal_start(struct inode *inode, + unsigned int line, int type, + int nblocks) { - return ext4_journal_start_sb(inode->i_sb, nblocks); + return __ext4_journal_start_sb(inode->i_sb, line, type, nblocks); } #define ext4_journal_stop(handle) \ diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 5ae1674..372b2cbe 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -112,7 +112,7 @@ static int ext4_split_extent_at(handle_t *handle, int flags); static int ext4_find_delayed_extent(struct inode *inode, - struct ext4_ext_cache *newex); + struct extent_status *newes); static int ext4_ext_truncate_extend_restart(handle_t *handle, struct inode *inode, @@ -714,7 +714,6 @@ int ext4_ext_tree_init(handle_t *handle, struct inode *inode) eh->eh_magic = EXT4_EXT_MAGIC; eh->eh_max = cpu_to_le16(ext4_ext_space_root(inode, 0)); ext4_mark_inode_dirty(handle, inode); - ext4_ext_invalidate_cache(inode); return 0; } @@ -725,6 +724,7 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block, struct ext4_extent_header *eh; struct buffer_head *bh; short int depth, i, ppos = 0, alloc = 0; + int ret; eh = ext_inode_hdr(inode); depth = ext_depth(inode); @@ -752,12 +752,15 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block, path[ppos].p_ext = NULL; bh = sb_getblk(inode->i_sb, path[ppos].p_block); - if (unlikely(!bh)) + if (unlikely(!bh)) { + ret = -ENOMEM; goto err; + } if (!bh_uptodate_or_lock(bh)) { trace_ext4_ext_load_extent(inode, block, path[ppos].p_block); - if (bh_submit_read(bh) < 0) { + ret = bh_submit_read(bh); + if (ret < 0) { put_bh(bh); goto err; } @@ -768,13 +771,15 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block, put_bh(bh); EXT4_ERROR_INODE(inode, "ppos %d > depth %d", ppos, depth); + ret = -EIO; goto err; } path[ppos].p_bh = bh; path[ppos].p_hdr = eh; i--; - if (ext4_ext_check_block(inode, eh, i, bh)) + ret = ext4_ext_check_block(inode, eh, i, bh); + if (ret < 0) goto err; } @@ -796,7 +801,7 @@ err: ext4_ext_drop_refs(path); if (alloc) kfree(path); - return ERR_PTR(-EIO); + return ERR_PTR(ret); } /* @@ -950,8 +955,8 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode, goto cleanup; } bh = sb_getblk(inode->i_sb, newblock); - if (!bh) { - err = -EIO; + if (unlikely(!bh)) { + err = -ENOMEM; goto cleanup; } lock_buffer(bh); @@ -1023,8 +1028,8 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode, oldblock = newblock; newblock = ablocks[--a]; bh = sb_getblk(inode->i_sb, newblock); - if (!bh) { - err = -EIO; + if (unlikely(!bh)) { + err = -ENOMEM; goto cleanup; } lock_buffer(bh); @@ -1136,11 +1141,8 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode, return err; bh = sb_getblk(inode->i_sb, newblock); - if (!bh) { - err = -EIO; - ext4_std_error(inode->i_sb, err); - return err; - } + if (unlikely(!bh)) + return -ENOMEM; lock_buffer(bh); err = ext4_journal_get_create_access(handle, bh); @@ -1960,7 +1962,6 @@ cleanup: ext4_ext_drop_refs(npath); kfree(npath); } - ext4_ext_invalidate_cache(inode); return err; } @@ -1969,8 +1970,8 @@ static int ext4_fill_fiemap_extents(struct inode *inode, struct fiemap_extent_info *fieinfo) { struct ext4_ext_path *path = NULL; - struct ext4_ext_cache newex; struct ext4_extent *ex; + struct extent_status es; ext4_lblk_t next, next_del, start = 0, end = 0; ext4_lblk_t last = block + num; int exists, depth = 0, err = 0; @@ -2044,37 +2045,47 @@ static int ext4_fill_fiemap_extents(struct inode *inode, BUG_ON(end <= start); if (!exists) { - newex.ec_block = start; - newex.ec_len = end - start; - newex.ec_start = 0; + es.es_lblk = start; + es.es_len = end - start; + es.es_pblk = 0; } else { - newex.ec_block = le32_to_cpu(ex->ee_block); - newex.ec_len = ext4_ext_get_actual_len(ex); - newex.ec_start = ext4_ext_pblock(ex); + es.es_lblk = le32_to_cpu(ex->ee_block); + es.es_len = ext4_ext_get_actual_len(ex); + es.es_pblk = ext4_ext_pblock(ex); if (ext4_ext_is_uninitialized(ex)) flags |= FIEMAP_EXTENT_UNWRITTEN; } /* - * Find delayed extent and update newex accordingly. We call - * it even in !exists case to find out whether newex is the + * Find delayed extent and update es accordingly. We call + * it even in !exists case to find out whether es is the * last existing extent or not. */ - next_del = ext4_find_delayed_extent(inode, &newex); + next_del = ext4_find_delayed_extent(inode, &es); if (!exists && next_del) { exists = 1; flags |= FIEMAP_EXTENT_DELALLOC; } up_read(&EXT4_I(inode)->i_data_sem); - if (unlikely(newex.ec_len == 0)) { - EXT4_ERROR_INODE(inode, "newex.ec_len == 0"); + if (unlikely(es.es_len == 0)) { + EXT4_ERROR_INODE(inode, "es.es_len == 0"); err = -EIO; break; } - /* This is possible iff next == next_del == EXT_MAX_BLOCKS */ - if (next == next_del) { + /* + * This is possible iff next == next_del == EXT_MAX_BLOCKS. + * we need to check next == EXT_MAX_BLOCKS because it is + * possible that an extent is with unwritten and delayed + * status due to when an extent is delayed allocated and + * is allocated by fallocate status tree will track both of + * them in a extent. + * + * So we could return a unwritten and delayed extent, and + * its block is equal to 'next'. + */ + if (next == next_del && next == EXT_MAX_BLOCKS) { flags |= FIEMAP_EXTENT_LAST; if (unlikely(next_del != EXT_MAX_BLOCKS || next != EXT_MAX_BLOCKS)) { @@ -2089,9 +2100,9 @@ static int ext4_fill_fiemap_extents(struct inode *inode, if (exists) { err = fiemap_fill_next_extent(fieinfo, - (__u64)newex.ec_block << blksize_bits, - (__u64)newex.ec_start << blksize_bits, - (__u64)newex.ec_len << blksize_bits, + (__u64)es.es_lblk << blksize_bits, + (__u64)es.es_pblk << blksize_bits, + (__u64)es.es_len << blksize_bits, flags); if (err < 0) break; @@ -2101,7 +2112,7 @@ static int ext4_fill_fiemap_extents(struct inode *inode, } } - block = newex.ec_block + newex.ec_len; + block = es.es_lblk + es.es_len; } if (path) { @@ -2112,21 +2123,6 @@ static int ext4_fill_fiemap_extents(struct inode *inode, return err; } -static void -ext4_ext_put_in_cache(struct inode *inode, ext4_lblk_t block, - __u32 len, ext4_fsblk_t start) -{ - struct ext4_ext_cache *cex; - BUG_ON(len == 0); - spin_lock(&EXT4_I(inode)->i_block_reservation_lock); - trace_ext4_ext_put_in_cache(inode, block, len, start); - cex = &EXT4_I(inode)->i_cached_extent; - cex->ec_block = block; - cex->ec_len = len; - cex->ec_start = start; - spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); -} - /* * ext4_ext_put_gap_in_cache: * calculate boundaries of the gap that the requested block fits into @@ -2143,9 +2139,10 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path, ex = path[depth].p_ext; if (ex == NULL) { - /* there is no extent yet, so gap is [0;-] */ - lblock = 0; - len = EXT_MAX_BLOCKS; + /* + * there is no extent yet, so gap is [0;-] and we + * don't cache it + */ ext_debug("cache gap(whole file):"); } else if (block < le32_to_cpu(ex->ee_block)) { lblock = block; @@ -2154,6 +2151,9 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path, block, le32_to_cpu(ex->ee_block), ext4_ext_get_actual_len(ex)); + if (!ext4_find_delalloc_range(inode, lblock, lblock + len - 1)) + ext4_es_insert_extent(inode, lblock, len, ~0, + EXTENT_STATUS_HOLE); } else if (block >= le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex)) { ext4_lblk_t next; @@ -2167,58 +2167,15 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path, block); BUG_ON(next == lblock); len = next - lblock; + if (!ext4_find_delalloc_range(inode, lblock, lblock + len - 1)) + ext4_es_insert_extent(inode, lblock, len, ~0, + EXTENT_STATUS_HOLE); } else { lblock = len = 0; BUG(); } ext_debug(" -> %u:%lu\n", lblock, len); - ext4_ext_put_in_cache(inode, lblock, len, 0); -} - -/* - * ext4_ext_in_cache() - * Checks to see if the given block is in the cache. - * If it is, the cached extent is stored in the given - * cache extent pointer. - * - * @inode: The files inode - * @block: The block to look for in the cache - * @ex: Pointer where the cached extent will be stored - * if it contains block - * - * Return 0 if cache is invalid; 1 if the cache is valid - */ -static int -ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block, - struct ext4_extent *ex) -{ - struct ext4_ext_cache *cex; - int ret = 0; - - /* - * We borrow i_block_reservation_lock to protect i_cached_extent - */ - spin_lock(&EXT4_I(inode)->i_block_reservation_lock); - cex = &EXT4_I(inode)->i_cached_extent; - - /* has cache valid data? */ - if (cex->ec_len == 0) - goto errout; - - if (in_range(block, cex->ec_block, cex->ec_len)) { - ex->ee_block = cpu_to_le32(cex->ec_block); - ext4_ext_store_pblock(ex, cex->ec_start); - ex->ee_len = cpu_to_le16(cex->ec_len); - ext_debug("%u cached by %u:%u:%llu\n", - block, - cex->ec_block, cex->ec_len, cex->ec_start); - ret = 1; - } -errout: - trace_ext4_ext_in_cache(inode, block, ret); - spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); - return ret; } /* @@ -2653,13 +2610,11 @@ static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, ext_debug("truncate since %u to %u\n", start, end); /* probably first extent we're gonna free will be last in block */ - handle = ext4_journal_start(inode, depth + 1); + handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, depth + 1); if (IS_ERR(handle)) return PTR_ERR(handle); again: - ext4_ext_invalidate_cache(inode); - trace_ext4_ext_remove_space(inode, start, depth); /* @@ -3519,19 +3474,19 @@ out: * * Return 1 if there is a delalloc block in the range, otherwise 0. */ -static int ext4_find_delalloc_range(struct inode *inode, - ext4_lblk_t lblk_start, - ext4_lblk_t lblk_end) +int ext4_find_delalloc_range(struct inode *inode, + ext4_lblk_t lblk_start, + ext4_lblk_t lblk_end) { struct extent_status es; - es.start = lblk_start; - ext4_es_find_extent(inode, &es); - if (es.len == 0) + ext4_es_find_delayed_extent(inode, lblk_start, &es); + if (es.es_len == 0) return 0; /* there is no delay extent in this tree */ - else if (es.start <= lblk_start && lblk_start < es.start + es.len) + else if (es.es_lblk <= lblk_start && + lblk_start < es.es_lblk + es.es_len) return 1; - else if (lblk_start <= es.start && es.start <= lblk_end) + else if (lblk_start <= es.es_lblk && es.es_lblk <= lblk_end) return 1; else return 0; @@ -3656,6 +3611,7 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode, ext4_set_io_unwritten_flag(inode, io); else ext4_set_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); + map->m_flags |= EXT4_MAP_UNWRITTEN; if (ext4_should_dioread_nolock(inode)) map->m_flags |= EXT4_MAP_UNINIT; goto out; @@ -3677,8 +3633,10 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode, * repeat fallocate creation request * we already have an unwritten extent */ - if (flags & EXT4_GET_BLOCKS_UNINIT_EXT) + if (flags & EXT4_GET_BLOCKS_UNINIT_EXT) { + map->m_flags |= EXT4_MAP_UNWRITTEN; goto map_out; + } /* buffered READ or buffered write_begin() lookup */ if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { @@ -3898,35 +3856,6 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, map->m_lblk, map->m_len, inode->i_ino); trace_ext4_ext_map_blocks_enter(inode, map->m_lblk, map->m_len, flags); - /* check in cache */ - if (ext4_ext_in_cache(inode, map->m_lblk, &newex)) { - if (!newex.ee_start_lo && !newex.ee_start_hi) { - if ((sbi->s_cluster_ratio > 1) && - ext4_find_delalloc_cluster(inode, map->m_lblk)) - map->m_flags |= EXT4_MAP_FROM_CLUSTER; - - if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { - /* - * block isn't allocated yet and - * user doesn't want to allocate it - */ - goto out2; - } - /* we should allocate requested block */ - } else { - /* block is already allocated */ - if (sbi->s_cluster_ratio > 1) - map->m_flags |= EXT4_MAP_FROM_CLUSTER; - newblock = map->m_lblk - - le32_to_cpu(newex.ee_block) - + ext4_ext_pblock(&newex); - /* number of remaining blocks in the extent */ - allocated = ext4_ext_get_actual_len(&newex) - - (map->m_lblk - le32_to_cpu(newex.ee_block)); - goto out; - } - } - /* find extent for this block */ path = ext4_ext_find_extent(inode, map->m_lblk, NULL); if (IS_ERR(path)) { @@ -3973,15 +3902,9 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, ext_debug("%u fit into %u:%d -> %llu\n", map->m_lblk, ee_block, ee_len, newblock); - /* - * Do not put uninitialized extent - * in the cache - */ - if (!ext4_ext_is_uninitialized(ex)) { - ext4_ext_put_in_cache(inode, ee_block, - ee_len, ee_start); + if (!ext4_ext_is_uninitialized(ex)) goto out; - } + allocated = ext4_ext_handle_uninitialized_extents( handle, inode, map, path, flags, allocated, newblock); @@ -4002,7 +3925,8 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, * put just found gap into cache to speed up * subsequent requests */ - ext4_ext_put_gap_in_cache(inode, path, map->m_lblk); + if ((flags & EXT4_GET_BLOCKS_NO_PUT_HOLE) == 0) + ext4_ext_put_gap_in_cache(inode, path, map->m_lblk); goto out2; } @@ -4108,6 +4032,7 @@ got_allocated_blocks: /* Mark uninitialized */ if (flags & EXT4_GET_BLOCKS_UNINIT_EXT){ ext4_ext_mark_uninitialized(&newex); + map->m_flags |= EXT4_MAP_UNWRITTEN; /* * io_end structure was created for every IO write to an * uninitialized extent. To avoid unnecessary conversion, @@ -4241,10 +4166,9 @@ got_allocated_blocks: * Cache the extent and update transaction to commit on fdatasync only * when it is _not_ an uninitialized extent. */ - if ((flags & EXT4_GET_BLOCKS_UNINIT_EXT) == 0) { - ext4_ext_put_in_cache(inode, map->m_lblk, allocated, newblock); + if ((flags & EXT4_GET_BLOCKS_UNINIT_EXT) == 0) ext4_update_inode_fsync_trans(handle, inode, 1); - } else + else ext4_update_inode_fsync_trans(handle, inode, 0); out: if (allocated > map->m_len) @@ -4284,7 +4208,7 @@ void ext4_ext_truncate(struct inode *inode) * probably first extent we're gonna free will be last in block */ err = ext4_writepage_trans_blocks(inode); - handle = ext4_journal_start(inode, err); + handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, err); if (IS_ERR(handle)) return; @@ -4303,7 +4227,6 @@ void ext4_ext_truncate(struct inode *inode) goto out_stop; down_write(&EXT4_I(inode)->i_data_sem); - ext4_ext_invalidate_cache(inode); ext4_discard_preallocations(inode); @@ -4397,13 +4320,6 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len) struct ext4_map_blocks map; unsigned int credits, blkbits = inode->i_blkbits; - /* - * currently supporting (pre)allocate mode for extent-based - * files _only_ - */ - if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) - return -EOPNOTSUPP; - /* Return error if mode is not supported */ if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; @@ -4415,6 +4331,13 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len) if (ret) return ret; + /* + * currently supporting (pre)allocate mode for extent-based + * files _only_ + */ + if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) + return -EOPNOTSUPP; + trace_ext4_fallocate_enter(inode, offset, len, mode); map.m_lblk = offset >> blkbits; /* @@ -4451,7 +4374,8 @@ retry: while (ret >= 0 && ret < max_blocks) { map.m_lblk = map.m_lblk + ret; map.m_len = max_blocks = max_blocks - ret; - handle = ext4_journal_start(inode, credits); + handle = ext4_journal_start(inode, EXT4_HT_MAP_BLOCKS, + credits); if (IS_ERR(handle)) { ret = PTR_ERR(handle); break; @@ -4459,11 +4383,11 @@ retry: ret = ext4_map_blocks(handle, inode, &map, flags); if (ret <= 0) { #ifdef EXT4FS_DEBUG - WARN_ON(ret <= 0); - printk(KERN_ERR "%s: ext4_ext_map_blocks " - "returned error inode#%lu, block=%u, " - "max_blocks=%u", __func__, - inode->i_ino, map.m_lblk, max_blocks); + ext4_warning(inode->i_sb, + "inode #%lu: block %u: len %u: " + "ext4_ext_map_blocks returned %d", + inode->i_ino, map.m_lblk, + map.m_len, ret); #endif ext4_mark_inode_dirty(handle, inode); ret2 = ext4_journal_stop(handle); @@ -4529,21 +4453,19 @@ int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset, while (ret >= 0 && ret < max_blocks) { map.m_lblk += ret; map.m_len = (max_blocks -= ret); - handle = ext4_journal_start(inode, credits); + handle = ext4_journal_start(inode, EXT4_HT_MAP_BLOCKS, credits); if (IS_ERR(handle)) { ret = PTR_ERR(handle); break; } ret = ext4_map_blocks(handle, inode, &map, EXT4_GET_BLOCKS_IO_CONVERT_EXT); - if (ret <= 0) { - WARN_ON(ret <= 0); - ext4_msg(inode->i_sb, KERN_ERR, - "%s:%d: inode #%lu: block %u: len %u: " - "ext4_ext_map_blocks returned %d", - __func__, __LINE__, inode->i_ino, map.m_lblk, - map.m_len, ret); - } + if (ret <= 0) + ext4_warning(inode->i_sb, + "inode #%lu: block %u: len %u: " + "ext4_ext_map_blocks returned %d", + inode->i_ino, map.m_lblk, + map.m_len, ret); ext4_mark_inode_dirty(handle, inode); ret2 = ext4_journal_stop(handle); if (ret <= 0 || ret2 ) @@ -4553,42 +4475,48 @@ int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset, } /* - * If newex is not existing extent (newex->ec_start equals zero) find - * delayed extent at start of newex and update newex accordingly and + * If newes is not existing extent (newes->ec_pblk equals zero) find + * delayed extent at start of newes and update newes accordingly and * return start of the next delayed extent. * - * If newex is existing extent (newex->ec_start is not equal zero) + * If newes is existing extent (newes->ec_pblk is not equal zero) * return start of next delayed extent or EXT_MAX_BLOCKS if no delayed - * extent found. Leave newex unmodified. + * extent found. Leave newes unmodified. */ static int ext4_find_delayed_extent(struct inode *inode, - struct ext4_ext_cache *newex) + struct extent_status *newes) { struct extent_status es; - ext4_lblk_t next_del; + ext4_lblk_t block, next_del; - es.start = newex->ec_block; - next_del = ext4_es_find_extent(inode, &es); + ext4_es_find_delayed_extent(inode, newes->es_lblk, &es); - if (newex->ec_start == 0) { + if (newes->es_pblk == 0) { /* - * No extent in extent-tree contains block @newex->ec_start, + * No extent in extent-tree contains block @newes->es_pblk, * then the block may stay in 1)a hole or 2)delayed-extent. */ - if (es.len == 0) + if (es.es_len == 0) /* A hole found. */ return 0; - if (es.start > newex->ec_block) { + if (es.es_lblk > newes->es_lblk) { /* A hole found. */ - newex->ec_len = min(es.start - newex->ec_block, - newex->ec_len); + newes->es_len = min(es.es_lblk - newes->es_lblk, + newes->es_len); return 0; } - newex->ec_len = es.start + es.len - newex->ec_block; + newes->es_len = es.es_lblk + es.es_len - newes->es_lblk; } + block = newes->es_lblk + newes->es_len; + ext4_es_find_delayed_extent(inode, block, &es); + if (es.es_len == 0) + next_del = EXT_MAX_BLOCKS; + else + next_del = es.es_lblk; + return next_del; } /* fiemap flags we can handle specified here */ @@ -4709,7 +4637,7 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length) inode_dio_wait(inode); credits = ext4_writepage_trans_blocks(inode); - handle = ext4_journal_start(inode, credits); + handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, credits); if (IS_ERR(handle)) { err = PTR_ERR(handle); goto out_dio; @@ -4786,14 +4714,12 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length) goto out; down_write(&EXT4_I(inode)->i_data_sem); - ext4_ext_invalidate_cache(inode); ext4_discard_preallocations(inode); err = ext4_es_remove_extent(inode, first_block, stop_block - first_block); err = ext4_ext_remove_space(inode, first_block, stop_block - 1); - ext4_ext_invalidate_cache(inode); ext4_discard_preallocations(inode); if (IS_SYNC(inode)) diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 564d981..f768f4a 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -23,40 +23,53 @@ * (e.g. Reservation space warning), and provide extent-level locking. * Delay extent tree is the first step to achieve this goal. It is * original built by Yongqiang Yang. At that time it is called delay - * extent tree, whose goal is only track delay extent in memory to + * extent tree, whose goal is only track delayed extents in memory to * simplify the implementation of fiemap and bigalloc, and introduce * lseek SEEK_DATA/SEEK_HOLE support. That is why it is still called - * delay extent tree at the following comment. But for better - * understand what it does, it has been rename to extent status tree. + * delay extent tree at the first commit. But for better understand + * what it does, it has been rename to extent status tree. * - * Currently the first step has been done. All delay extents are - * tracked in the tree. It maintains the delay extent when a delay - * allocation is issued, and the delay extent is written out or + * Step1: + * Currently the first step has been done. All delayed extents are + * tracked in the tree. It maintains the delayed extent when a delayed + * allocation is issued, and the delayed extent is written out or * invalidated. Therefore the implementation of fiemap and bigalloc * are simplified, and SEEK_DATA/SEEK_HOLE are introduced. * * The following comment describes the implemenmtation of extent * status tree and future works. + * + * Step2: + * In this step all extent status are tracked by extent status tree. + * Thus, we can first try to lookup a block mapping in this tree before + * finding it in extent tree. Hence, single extent cache can be removed + * because extent status tree can do a better job. Extents in status + * tree are loaded on-demand. Therefore, the extent status tree may not + * contain all of the extents in a file. Meanwhile we define a shrinker + * to reclaim memory from extent status tree because fragmented extent + * tree will make status tree cost too much memory. written/unwritten/- + * hole extents in the tree will be reclaimed by this shrinker when we + * are under high memory pressure. Delayed extents will not be + * reclimed because fiemap, bigalloc, and seek_data/hole need it. */ /* - * extents status tree implementation for ext4. + * Extent status tree implementation for ext4. * * * ========================================================================== - * Extents status encompass delayed extents and extent locks + * Extent status tree tracks all extent status. * - * 1. Why delayed extent implementation ? + * 1. Why we need to implement extent status tree? * - * Without delayed extent, ext4 identifies a delayed extent by looking + * Without extent status tree, ext4 identifies a delayed extent by looking * up page cache, this has several deficiencies - complicated, buggy, * and inefficient code. * - * FIEMAP, SEEK_HOLE/DATA, bigalloc, punch hole and writeout all need - * to know if a block or a range of blocks are belonged to a delayed - * extent. + * FIEMAP, SEEK_HOLE/DATA, bigalloc, and writeout all need to know if a + * block or a range of blocks are belonged to a delayed extent. * - * Let us have a look at how they do without delayed extents implementation. + * Let us have a look at how they do without extent status tree. * -- FIEMAP * FIEMAP looks up page cache to identify delayed allocations from holes. * @@ -68,47 +81,48 @@ * already under delayed allocation or not to determine whether * quota reserving is needed for the cluster. * - * -- punch hole - * punch hole looks up page cache to identify a delayed extent. - * * -- writeout * Writeout looks up whole page cache to see if a buffer is * mapped, If there are not very many delayed buffers, then it is * time comsuming. * - * With delayed extents implementation, FIEMAP, SEEK_HOLE/DATA, + * With extent status tree implementation, FIEMAP, SEEK_HOLE/DATA, * bigalloc and writeout can figure out if a block or a range of * blocks is under delayed allocation(belonged to a delayed extent) or - * not by searching the delayed extent tree. + * not by searching the extent tree. * * * ========================================================================== - * 2. ext4 delayed extents impelmentation + * 2. Ext4 extent status tree impelmentation + * + * -- extent + * A extent is a range of blocks which are contiguous logically and + * physically. Unlike extent in extent tree, this extent in ext4 is + * a in-memory struct, there is no corresponding on-disk data. There + * is no limit on length of extent, so an extent can contain as many + * blocks as they are contiguous logically and physically. * - * -- delayed extent - * A delayed extent is a range of blocks which are contiguous - * logically and under delayed allocation. Unlike extent in - * ext4, delayed extent in ext4 is a in-memory struct, there is - * no corresponding on-disk data. There is no limit on length of - * delayed extent, so a delayed extent can contain as many blocks - * as they are contiguous logically. + * -- extent status tree + * Every inode has an extent status tree and all allocation blocks + * are added to the tree with different status. The extent in the + * tree are ordered by logical block no. * - * -- delayed extent tree - * Every inode has a delayed extent tree and all under delayed - * allocation blocks are added to the tree as delayed extents. - * Delayed extents in the tree are ordered by logical block no. + * -- operations on a extent status tree + * There are three important operations on a delayed extent tree: find + * next extent, adding a extent(a range of blocks) and removing a extent. * - * -- operations on a delayed extent tree - * There are three operations on a delayed extent tree: find next - * delayed extent, adding a space(a range of blocks) and removing - * a space. + * -- race on a extent status tree + * Extent status tree is protected by inode->i_es_lock. * - * -- race on a delayed extent tree - * Delayed extent tree is protected inode->i_es_lock. + * -- memory consumption + * Fragmented extent tree will make extent status tree cost too much + * memory. Hence, we will reclaim written/unwritten/hole extents from + * the tree under a heavy memory pressure. * * * ========================================================================== - * 3. performance analysis + * 3. Performance analysis + * * -- overhead * 1. There is a cache extent for write access, so if writes are * not very random, adding space operaions are in O(1) time. @@ -120,15 +134,21 @@ * * ========================================================================== * 4. TODO list - * -- Track all extent status * - * -- Improve get block process + * -- Refactor delayed space reservation * * -- Extent-level locking */ static struct kmem_cache *ext4_es_cachep; +static int __es_insert_extent(struct inode *inode, struct extent_status *newes); +static int __es_remove_extent(struct inode *inode, ext4_lblk_t lblk, + ext4_lblk_t end); +static int __es_try_to_reclaim_extents(struct ext4_inode_info *ei, + int nr_to_scan); +static int ext4_es_reclaim_extents_count(struct super_block *sb); + int __init ext4_init_es(void) { ext4_es_cachep = KMEM_CACHE(extent_status, SLAB_RECLAIM_ACCOUNT); @@ -161,7 +181,9 @@ static void ext4_es_print_tree(struct inode *inode) while (node) { struct extent_status *es; es = rb_entry(node, struct extent_status, rb_node); - printk(KERN_DEBUG " [%u/%u)", es->start, es->len); + printk(KERN_DEBUG " [%u/%u) %llu %llx", + es->es_lblk, es->es_len, + ext4_es_pblock(es), ext4_es_status(es)); node = rb_next(node); } printk(KERN_DEBUG "\n"); @@ -170,10 +192,10 @@ static void ext4_es_print_tree(struct inode *inode) #define ext4_es_print_tree(inode) #endif -static inline ext4_lblk_t extent_status_end(struct extent_status *es) +static inline ext4_lblk_t ext4_es_end(struct extent_status *es) { - BUG_ON(es->start + es->len < es->start); - return es->start + es->len - 1; + BUG_ON(es->es_lblk + es->es_len < es->es_lblk); + return es->es_lblk + es->es_len - 1; } /* @@ -181,25 +203,25 @@ static inline ext4_lblk_t extent_status_end(struct extent_status *es) * it can't be found, try to find next extent. */ static struct extent_status *__es_tree_search(struct rb_root *root, - ext4_lblk_t offset) + ext4_lblk_t lblk) { struct rb_node *node = root->rb_node; struct extent_status *es = NULL; while (node) { es = rb_entry(node, struct extent_status, rb_node); - if (offset < es->start) + if (lblk < es->es_lblk) node = node->rb_left; - else if (offset > extent_status_end(es)) + else if (lblk > ext4_es_end(es)) node = node->rb_right; else return es; } - if (es && offset < es->start) + if (es && lblk < es->es_lblk) return es; - if (es && offset > extent_status_end(es)) { + if (es && lblk > ext4_es_end(es)) { node = rb_next(&es->rb_node); return node ? rb_entry(node, struct extent_status, rb_node) : NULL; @@ -209,79 +231,121 @@ static struct extent_status *__es_tree_search(struct rb_root *root, } /* - * ext4_es_find_extent: find the 1st delayed extent covering @es->start - * if it exists, otherwise, the next extent after @es->start. + * ext4_es_find_delayed_extent: find the 1st delayed extent covering @es->lblk + * if it exists, otherwise, the next extent after @es->lblk. * * @inode: the inode which owns delayed extents + * @lblk: the offset where we start to search * @es: delayed extent that we found - * - * Returns the first block of the next extent after es, otherwise - * EXT_MAX_BLOCKS if no delay extent is found. - * Delayed extent is returned via @es. */ -ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es) +void ext4_es_find_delayed_extent(struct inode *inode, ext4_lblk_t lblk, + struct extent_status *es) { struct ext4_es_tree *tree = NULL; struct extent_status *es1 = NULL; struct rb_node *node; - ext4_lblk_t ret = EXT_MAX_BLOCKS; - trace_ext4_es_find_extent_enter(inode, es->start); + BUG_ON(es == NULL); + trace_ext4_es_find_delayed_extent_enter(inode, lblk); read_lock(&EXT4_I(inode)->i_es_lock); tree = &EXT4_I(inode)->i_es_tree; - /* find delay extent in cache firstly */ + /* find extent in cache firstly */ + es->es_lblk = es->es_len = es->es_pblk = 0; if (tree->cache_es) { es1 = tree->cache_es; - if (in_range(es->start, es1->start, es1->len)) { - es_debug("%u cached by [%u/%u)\n", - es->start, es1->start, es1->len); + if (in_range(lblk, es1->es_lblk, es1->es_len)) { + es_debug("%u cached by [%u/%u) %llu %llx\n", + lblk, es1->es_lblk, es1->es_len, + ext4_es_pblock(es1), ext4_es_status(es1)); goto out; } } - es->len = 0; - es1 = __es_tree_search(&tree->root, es->start); + es1 = __es_tree_search(&tree->root, lblk); out: - if (es1) { - tree->cache_es = es1; - es->start = es1->start; - es->len = es1->len; - node = rb_next(&es1->rb_node); - if (node) { + if (es1 && !ext4_es_is_delayed(es1)) { + while ((node = rb_next(&es1->rb_node)) != NULL) { es1 = rb_entry(node, struct extent_status, rb_node); - ret = es1->start; + if (ext4_es_is_delayed(es1)) + break; } } + if (es1 && ext4_es_is_delayed(es1)) { + tree->cache_es = es1; + es->es_lblk = es1->es_lblk; + es->es_len = es1->es_len; + es->es_pblk = es1->es_pblk; + } + read_unlock(&EXT4_I(inode)->i_es_lock); - trace_ext4_es_find_extent_exit(inode, es, ret); - return ret; + ext4_es_lru_add(inode); + trace_ext4_es_find_delayed_extent_exit(inode, es); } static struct extent_status * -ext4_es_alloc_extent(ext4_lblk_t start, ext4_lblk_t len) +ext4_es_alloc_extent(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len, + ext4_fsblk_t pblk) { struct extent_status *es; es = kmem_cache_alloc(ext4_es_cachep, GFP_ATOMIC); if (es == NULL) return NULL; - es->start = start; - es->len = len; + es->es_lblk = lblk; + es->es_len = len; + es->es_pblk = pblk; + + /* + * We don't count delayed extent because we never try to reclaim them + */ + if (!ext4_es_is_delayed(es)) + EXT4_I(inode)->i_es_lru_nr++; + return es; } -static void ext4_es_free_extent(struct extent_status *es) +static void ext4_es_free_extent(struct inode *inode, struct extent_status *es) { + /* Decrease the lru counter when this es is not delayed */ + if (!ext4_es_is_delayed(es)) { + BUG_ON(EXT4_I(inode)->i_es_lru_nr == 0); + EXT4_I(inode)->i_es_lru_nr--; + } + kmem_cache_free(ext4_es_cachep, es); } +/* + * Check whether or not two extents can be merged + * Condition: + * - logical block number is contiguous + * - physical block number is contiguous + * - status is equal + */ +static int ext4_es_can_be_merged(struct extent_status *es1, + struct extent_status *es2) +{ + if (es1->es_lblk + es1->es_len != es2->es_lblk) + return 0; + + if (ext4_es_status(es1) != ext4_es_status(es2)) + return 0; + + if ((ext4_es_is_written(es1) || ext4_es_is_unwritten(es1)) && + (ext4_es_pblock(es1) + es1->es_len != ext4_es_pblock(es2))) + return 0; + + return 1; +} + static struct extent_status * -ext4_es_try_to_merge_left(struct ext4_es_tree *tree, struct extent_status *es) +ext4_es_try_to_merge_left(struct inode *inode, struct extent_status *es) { + struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree; struct extent_status *es1; struct rb_node *node; @@ -290,10 +354,10 @@ ext4_es_try_to_merge_left(struct ext4_es_tree *tree, struct extent_status *es) return es; es1 = rb_entry(node, struct extent_status, rb_node); - if (es->start == extent_status_end(es1) + 1) { - es1->len += es->len; + if (ext4_es_can_be_merged(es1, es)) { + es1->es_len += es->es_len; rb_erase(&es->rb_node, &tree->root); - ext4_es_free_extent(es); + ext4_es_free_extent(inode, es); es = es1; } @@ -301,8 +365,9 @@ ext4_es_try_to_merge_left(struct ext4_es_tree *tree, struct extent_status *es) } static struct extent_status * -ext4_es_try_to_merge_right(struct ext4_es_tree *tree, struct extent_status *es) +ext4_es_try_to_merge_right(struct inode *inode, struct extent_status *es) { + struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree; struct extent_status *es1; struct rb_node *node; @@ -311,69 +376,57 @@ ext4_es_try_to_merge_right(struct ext4_es_tree *tree, struct extent_status *es) return es; es1 = rb_entry(node, struct extent_status, rb_node); - if (es1->start == extent_status_end(es) + 1) { - es->len += es1->len; + if (ext4_es_can_be_merged(es, es1)) { + es->es_len += es1->es_len; rb_erase(node, &tree->root); - ext4_es_free_extent(es1); + ext4_es_free_extent(inode, es1); } return es; } -static int __es_insert_extent(struct ext4_es_tree *tree, ext4_lblk_t offset, - ext4_lblk_t len) +static int __es_insert_extent(struct inode *inode, struct extent_status *newes) { + struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree; struct rb_node **p = &tree->root.rb_node; struct rb_node *parent = NULL; struct extent_status *es; - ext4_lblk_t end = offset + len - 1; - - BUG_ON(end < offset); - es = tree->cache_es; - if (es && offset == (extent_status_end(es) + 1)) { - es_debug("cached by [%u/%u)\n", es->start, es->len); - es->len += len; - es = ext4_es_try_to_merge_right(tree, es); - goto out; - } else if (es && es->start == end + 1) { - es_debug("cached by [%u/%u)\n", es->start, es->len); - es->start = offset; - es->len += len; - es = ext4_es_try_to_merge_left(tree, es); - goto out; - } else if (es && es->start <= offset && - end <= extent_status_end(es)) { - es_debug("cached by [%u/%u)\n", es->start, es->len); - goto out; - } while (*p) { parent = *p; es = rb_entry(parent, struct extent_status, rb_node); - if (offset < es->start) { - if (es->start == end + 1) { - es->start = offset; - es->len += len; - es = ext4_es_try_to_merge_left(tree, es); + if (newes->es_lblk < es->es_lblk) { + if (ext4_es_can_be_merged(newes, es)) { + /* + * Here we can modify es_lblk directly + * because it isn't overlapped. + */ + es->es_lblk = newes->es_lblk; + es->es_len += newes->es_len; + if (ext4_es_is_written(es) || + ext4_es_is_unwritten(es)) + ext4_es_store_pblock(es, + newes->es_pblk); + es = ext4_es_try_to_merge_left(inode, es); goto out; } p = &(*p)->rb_left; - } else if (offset > extent_status_end(es)) { - if (offset == extent_status_end(es) + 1) { - es->len += len; - es = ext4_es_try_to_merge_right(tree, es); + } else if (newes->es_lblk > ext4_es_end(es)) { + if (ext4_es_can_be_merged(es, newes)) { + es->es_len += newes->es_len; + es = ext4_es_try_to_merge_right(inode, es); goto out; } p = &(*p)->rb_right; } else { - if (extent_status_end(es) <= end) - es->len = offset - es->start + len; - goto out; + BUG_ON(1); + return -EINVAL; } } - es = ext4_es_alloc_extent(offset, len); + es = ext4_es_alloc_extent(inode, newes->es_lblk, newes->es_len, + newes->es_pblk); if (!es) return -ENOMEM; rb_link_node(&es->rb_node, parent, p); @@ -385,85 +438,166 @@ out: } /* - * ext4_es_insert_extent() adds a space to a delayed extent tree. - * Caller holds inode->i_es_lock. + * ext4_es_insert_extent() adds a space to a extent status tree. * * ext4_es_insert_extent is called by ext4_da_write_begin and * ext4_es_remove_extent. * * Return 0 on success, error code on failure. */ -int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t offset, - ext4_lblk_t len) +int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk, + ext4_lblk_t len, ext4_fsblk_t pblk, + unsigned long long status) { - struct ext4_es_tree *tree; + struct extent_status newes; + ext4_lblk_t end = lblk + len - 1; int err = 0; - trace_ext4_es_insert_extent(inode, offset, len); - es_debug("add [%u/%u) to extent status tree of inode %lu\n", - offset, len, inode->i_ino); + es_debug("add [%u/%u) %llu %llx to extent status tree of inode %lu\n", + lblk, len, pblk, status, inode->i_ino); + + if (!len) + return 0; + + BUG_ON(end < lblk); + + newes.es_lblk = lblk; + newes.es_len = len; + ext4_es_store_pblock(&newes, pblk); + ext4_es_store_status(&newes, status); + trace_ext4_es_insert_extent(inode, &newes); write_lock(&EXT4_I(inode)->i_es_lock); - tree = &EXT4_I(inode)->i_es_tree; - err = __es_insert_extent(tree, offset, len); + err = __es_remove_extent(inode, lblk, end); + if (err != 0) + goto error; + err = __es_insert_extent(inode, &newes); + +error: write_unlock(&EXT4_I(inode)->i_es_lock); + ext4_es_lru_add(inode); ext4_es_print_tree(inode); return err; } /* - * ext4_es_remove_extent() removes a space from a delayed extent tree. - * Caller holds inode->i_es_lock. + * ext4_es_lookup_extent() looks up an extent in extent status tree. * - * Return 0 on success, error code on failure. + * ext4_es_lookup_extent is called by ext4_map_blocks/ext4_da_map_blocks. + * + * Return: 1 on found, 0 on not */ -int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t offset, - ext4_lblk_t len) +int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk, + struct extent_status *es) { - struct rb_node *node; struct ext4_es_tree *tree; + struct extent_status *es1 = NULL; + struct rb_node *node; + int found = 0; + + trace_ext4_es_lookup_extent_enter(inode, lblk); + es_debug("lookup extent in block %u\n", lblk); + + tree = &EXT4_I(inode)->i_es_tree; + read_lock(&EXT4_I(inode)->i_es_lock); + + /* find extent in cache firstly */ + es->es_lblk = es->es_len = es->es_pblk = 0; + if (tree->cache_es) { + es1 = tree->cache_es; + if (in_range(lblk, es1->es_lblk, es1->es_len)) { + es_debug("%u cached by [%u/%u)\n", + lblk, es1->es_lblk, es1->es_len); + found = 1; + goto out; + } + } + + node = tree->root.rb_node; + while (node) { + es1 = rb_entry(node, struct extent_status, rb_node); + if (lblk < es1->es_lblk) + node = node->rb_left; + else if (lblk > ext4_es_end(es1)) + node = node->rb_right; + else { + found = 1; + break; + } + } + +out: + if (found) { + BUG_ON(!es1); + es->es_lblk = es1->es_lblk; + es->es_len = es1->es_len; + es->es_pblk = es1->es_pblk; + } + + read_unlock(&EXT4_I(inode)->i_es_lock); + + ext4_es_lru_add(inode); + trace_ext4_es_lookup_extent_exit(inode, es, found); + return found; +} + +static int __es_remove_extent(struct inode *inode, ext4_lblk_t lblk, + ext4_lblk_t end) +{ + struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree; + struct rb_node *node; struct extent_status *es; struct extent_status orig_es; - ext4_lblk_t len1, len2, end; + ext4_lblk_t len1, len2; + ext4_fsblk_t block; int err = 0; - trace_ext4_es_remove_extent(inode, offset, len); - es_debug("remove [%u/%u) from extent status tree of inode %lu\n", - offset, len, inode->i_ino); - - end = offset + len - 1; - BUG_ON(end < offset); - write_lock(&EXT4_I(inode)->i_es_lock); - tree = &EXT4_I(inode)->i_es_tree; - es = __es_tree_search(&tree->root, offset); + es = __es_tree_search(&tree->root, lblk); if (!es) goto out; - if (es->start > end) + if (es->es_lblk > end) goto out; /* Simply invalidate cache_es. */ tree->cache_es = NULL; - orig_es.start = es->start; - orig_es.len = es->len; - len1 = offset > es->start ? offset - es->start : 0; - len2 = extent_status_end(es) > end ? - extent_status_end(es) - end : 0; + orig_es.es_lblk = es->es_lblk; + orig_es.es_len = es->es_len; + orig_es.es_pblk = es->es_pblk; + + len1 = lblk > es->es_lblk ? lblk - es->es_lblk : 0; + len2 = ext4_es_end(es) > end ? ext4_es_end(es) - end : 0; if (len1 > 0) - es->len = len1; + es->es_len = len1; if (len2 > 0) { if (len1 > 0) { - err = __es_insert_extent(tree, end + 1, len2); + struct extent_status newes; + + newes.es_lblk = end + 1; + newes.es_len = len2; + if (ext4_es_is_written(&orig_es) || + ext4_es_is_unwritten(&orig_es)) { + block = ext4_es_pblock(&orig_es) + + orig_es.es_len - len2; + ext4_es_store_pblock(&newes, block); + } + ext4_es_store_status(&newes, ext4_es_status(&orig_es)); + err = __es_insert_extent(inode, &newes); if (err) { - es->start = orig_es.start; - es->len = orig_es.len; + es->es_lblk = orig_es.es_lblk; + es->es_len = orig_es.es_len; goto out; } } else { - es->start = end + 1; - es->len = len2; + es->es_lblk = end + 1; + es->es_len = len2; + if (ext4_es_is_written(es) || + ext4_es_is_unwritten(es)) { + block = orig_es.es_pblk + orig_es.es_len - len2; + ext4_es_store_pblock(es, block); + } } goto out; } @@ -476,10 +610,10 @@ int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t offset, es = NULL; } - while (es && extent_status_end(es) <= end) { + while (es && ext4_es_end(es) <= end) { node = rb_next(&es->rb_node); rb_erase(&es->rb_node, &tree->root); - ext4_es_free_extent(es); + ext4_es_free_extent(inode, es); if (!node) { es = NULL; break; @@ -487,14 +621,183 @@ int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t offset, es = rb_entry(node, struct extent_status, rb_node); } - if (es && es->start < end + 1) { - len1 = extent_status_end(es) - end; - es->start = end + 1; - es->len = len1; + if (es && es->es_lblk < end + 1) { + ext4_lblk_t orig_len = es->es_len; + + len1 = ext4_es_end(es) - end; + es->es_lblk = end + 1; + es->es_len = len1; + if (ext4_es_is_written(es) || ext4_es_is_unwritten(es)) { + block = es->es_pblk + orig_len - len1; + ext4_es_store_pblock(es, block); + } } out: + return err; +} + +/* + * ext4_es_remove_extent() removes a space from a extent status tree. + * + * Return 0 on success, error code on failure. + */ +int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk, + ext4_lblk_t len) +{ + ext4_lblk_t end; + int err = 0; + + trace_ext4_es_remove_extent(inode, lblk, len); + es_debug("remove [%u/%u) from extent status tree of inode %lu\n", + lblk, len, inode->i_ino); + + if (!len) + return err; + + end = lblk + len - 1; + BUG_ON(end < lblk); + + write_lock(&EXT4_I(inode)->i_es_lock); + err = __es_remove_extent(inode, lblk, end); write_unlock(&EXT4_I(inode)->i_es_lock); ext4_es_print_tree(inode); return err; } + +static int ext4_es_shrink(struct shrinker *shrink, struct shrink_control *sc) +{ + struct ext4_sb_info *sbi = container_of(shrink, + struct ext4_sb_info, s_es_shrinker); + struct ext4_inode_info *ei; + struct list_head *cur, *tmp, scanned; + int nr_to_scan = sc->nr_to_scan; + int ret, nr_shrunk = 0; + + trace_ext4_es_shrink_enter(sbi->s_sb, nr_to_scan); + + if (!nr_to_scan) + return ext4_es_reclaim_extents_count(sbi->s_sb); + + INIT_LIST_HEAD(&scanned); + + spin_lock(&sbi->s_es_lru_lock); + list_for_each_safe(cur, tmp, &sbi->s_es_lru) { + list_move_tail(cur, &scanned); + + ei = list_entry(cur, struct ext4_inode_info, i_es_lru); + + read_lock(&ei->i_es_lock); + if (ei->i_es_lru_nr == 0) { + read_unlock(&ei->i_es_lock); + continue; + } + read_unlock(&ei->i_es_lock); + + write_lock(&ei->i_es_lock); + ret = __es_try_to_reclaim_extents(ei, nr_to_scan); + write_unlock(&ei->i_es_lock); + + nr_shrunk += ret; + nr_to_scan -= ret; + if (nr_to_scan == 0) + break; + } + list_splice_tail(&scanned, &sbi->s_es_lru); + spin_unlock(&sbi->s_es_lru_lock); + trace_ext4_es_shrink_exit(sbi->s_sb, nr_shrunk); + + return ext4_es_reclaim_extents_count(sbi->s_sb); +} + +void ext4_es_register_shrinker(struct super_block *sb) +{ + struct ext4_sb_info *sbi; + + sbi = EXT4_SB(sb); + INIT_LIST_HEAD(&sbi->s_es_lru); + spin_lock_init(&sbi->s_es_lru_lock); + sbi->s_es_shrinker.shrink = ext4_es_shrink; + sbi->s_es_shrinker.seeks = DEFAULT_SEEKS; + register_shrinker(&sbi->s_es_shrinker); +} + +void ext4_es_unregister_shrinker(struct super_block *sb) +{ + unregister_shrinker(&EXT4_SB(sb)->s_es_shrinker); +} + +void ext4_es_lru_add(struct inode *inode) +{ + struct ext4_inode_info *ei = EXT4_I(inode); + struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); + + spin_lock(&sbi->s_es_lru_lock); + if (list_empty(&ei->i_es_lru)) + list_add_tail(&ei->i_es_lru, &sbi->s_es_lru); + else + list_move_tail(&ei->i_es_lru, &sbi->s_es_lru); + spin_unlock(&sbi->s_es_lru_lock); +} + +void ext4_es_lru_del(struct inode *inode) +{ + struct ext4_inode_info *ei = EXT4_I(inode); + struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); + + spin_lock(&sbi->s_es_lru_lock); + if (!list_empty(&ei->i_es_lru)) + list_del_init(&ei->i_es_lru); + spin_unlock(&sbi->s_es_lru_lock); +} + +static int ext4_es_reclaim_extents_count(struct super_block *sb) +{ + struct ext4_sb_info *sbi = EXT4_SB(sb); + struct ext4_inode_info *ei; + struct list_head *cur; + int nr_cached = 0; + + spin_lock(&sbi->s_es_lru_lock); + list_for_each(cur, &sbi->s_es_lru) { + ei = list_entry(cur, struct ext4_inode_info, i_es_lru); + read_lock(&ei->i_es_lock); + nr_cached += ei->i_es_lru_nr; + read_unlock(&ei->i_es_lock); + } + spin_unlock(&sbi->s_es_lru_lock); + trace_ext4_es_reclaim_extents_count(sb, nr_cached); + return nr_cached; +} + +static int __es_try_to_reclaim_extents(struct ext4_inode_info *ei, + int nr_to_scan) +{ + struct inode *inode = &ei->vfs_inode; + struct ext4_es_tree *tree = &ei->i_es_tree; + struct rb_node *node; + struct extent_status *es; + int nr_shrunk = 0; + + if (ei->i_es_lru_nr == 0) + return 0; + + node = rb_first(&tree->root); + while (node != NULL) { + es = rb_entry(node, struct extent_status, rb_node); + node = rb_next(&es->rb_node); + /* + * We can't reclaim delayed extent from status tree because + * fiemap, bigallic, and seek_data/hole need to use it. + */ + if (!ext4_es_is_delayed(es)) { + rb_erase(&es->rb_node, &tree->root); + ext4_es_free_extent(inode, es); + nr_shrunk++; + if (--nr_to_scan == 0) + break; + } + } + tree->cache_es = NULL; + return nr_shrunk; +} diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h index 077f82d..cf83e77 100644 --- a/fs/ext4/extents_status.h +++ b/fs/ext4/extents_status.h @@ -20,10 +20,21 @@ #define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) #endif +#define EXTENT_STATUS_WRITTEN 0x80000000 /* written extent */ +#define EXTENT_STATUS_UNWRITTEN 0x40000000 /* unwritten extent */ +#define EXTENT_STATUS_DELAYED 0x20000000 /* delayed extent */ +#define EXTENT_STATUS_HOLE 0x10000000 /* hole */ + +#define EXTENT_STATUS_FLAGS (EXTENT_STATUS_WRITTEN | \ + EXTENT_STATUS_UNWRITTEN | \ + EXTENT_STATUS_DELAYED | \ + EXTENT_STATUS_HOLE) + struct extent_status { struct rb_node rb_node; - ext4_lblk_t start; /* first block extent covers */ - ext4_lblk_t len; /* length of extent in block */ + ext4_lblk_t es_lblk; /* first logical block extent covers */ + ext4_lblk_t es_len; /* length of extent in block */ + ext4_fsblk_t es_pblk; /* first physical block */ }; struct ext4_es_tree { @@ -35,11 +46,69 @@ extern int __init ext4_init_es(void); extern void ext4_exit_es(void); extern void ext4_es_init_tree(struct ext4_es_tree *tree); -extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t start, +extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk, + ext4_lblk_t len, ext4_fsblk_t pblk, + unsigned long long status); +extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len); -extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t start, - ext4_lblk_t len); -extern ext4_lblk_t ext4_es_find_extent(struct inode *inode, - struct extent_status *es); +extern void ext4_es_find_delayed_extent(struct inode *inode, ext4_lblk_t lblk, + struct extent_status *es); +extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk, + struct extent_status *es); + +static inline int ext4_es_is_written(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_WRITTEN); +} + +static inline int ext4_es_is_unwritten(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_UNWRITTEN); +} + +static inline int ext4_es_is_delayed(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_DELAYED); +} + +static inline int ext4_es_is_hole(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_HOLE); +} + +static inline ext4_fsblk_t ext4_es_status(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_FLAGS); +} + +static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es) +{ + return (es->es_pblk & ~EXTENT_STATUS_FLAGS); +} + +static inline void ext4_es_store_pblock(struct extent_status *es, + ext4_fsblk_t pb) +{ + ext4_fsblk_t block; + + block = (pb & ~EXTENT_STATUS_FLAGS) | + (es->es_pblk & EXTENT_STATUS_FLAGS); + es->es_pblk = block; +} + +static inline void ext4_es_store_status(struct extent_status *es, + unsigned long long status) +{ + ext4_fsblk_t block; + + block = (status & EXTENT_STATUS_FLAGS) | + (es->es_pblk & ~EXTENT_STATUS_FLAGS); + es->es_pblk = block; +} + +extern void ext4_es_register_shrinker(struct super_block *sb); +extern void ext4_es_unregister_shrinker(struct super_block *sb); +extern void ext4_es_lru_add(struct inode *inode); +extern void ext4_es_lru_del(struct inode *inode); #endif /* _EXT4_EXTENTS_STATUS_H */ diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 405565a6..7e85a10 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -240,7 +240,7 @@ static int ext4_file_open(struct inode * inode, struct file * filp) handle_t *handle; int err; - handle = ext4_journal_start_sb(sb, 1); + handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); if (IS_ERR(handle)) return PTR_ERR(handle); err = ext4_journal_get_write_access(handle, sbi->s_sbh); @@ -464,10 +464,8 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize) * If there is a delay extent at this offset, * it will be as a data. */ - es.start = last; - (void)ext4_es_find_extent(inode, &es); - if (last >= es.start && - last < es.start + es.len) { + ext4_es_find_delayed_extent(inode, last, &es); + if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) { if (last != start) dataoff = last << blkbits; break; @@ -549,11 +547,9 @@ static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize) * If there is a delay extent at this offset, * we will skip this extent. */ - es.start = last; - (void)ext4_es_find_extent(inode, &es); - if (last >= es.start && - last < es.start + es.len) { - last = es.start + es.len; + ext4_es_find_delayed_extent(inode, last, &es); + if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) { + last = es.es_lblk + es.es_len; holeoff = last << blkbits; continue; } diff --git a/fs/ext4/hash.c b/fs/ext4/hash.c index fa8e491..3d586f0 100644 --- a/fs/ext4/hash.c +++ b/fs/ext4/hash.c @@ -155,11 +155,11 @@ int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo) /* Check to see if the seed is all zero's */ if (hinfo->seed) { for (i = 0; i < 4; i++) { - if (hinfo->seed[i]) + if (hinfo->seed[i]) { + memcpy(buf, hinfo->seed, sizeof(buf)); break; + } } - if (i < 4) - memcpy(buf, hinfo->seed, sizeof(buf)); } switch (hinfo->hash_version) { diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 3f32c80..32fd2b9 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -634,8 +634,10 @@ static int find_group_other(struct super_block *sb, struct inode *parent, * For other inodes, search forward from the parent directory's block * group to find a free inode. */ -struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, umode_t mode, - const struct qstr *qstr, __u32 goal, uid_t *owner) +struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, + umode_t mode, const struct qstr *qstr, + __u32 goal, uid_t *owner, int handle_type, + unsigned int line_no, int nblocks) { struct super_block *sb; struct buffer_head *inode_bitmap_bh = NULL; @@ -725,6 +727,15 @@ repeat_in_this_group: "inode=%lu", ino + 1); continue; } + if (!handle) { + BUG_ON(nblocks <= 0); + handle = __ext4_journal_start_sb(dir->i_sb, line_no, + handle_type, nblocks); + if (IS_ERR(handle)) { + err = PTR_ERR(handle); + goto fail; + } + } BUFFER_TRACE(inode_bitmap_bh, "get_write_access"); err = ext4_journal_get_write_access(handle, inode_bitmap_bh); if (err) @@ -1017,17 +1028,17 @@ iget_failed: inode = NULL; bad_orphan: ext4_warning(sb, "bad orphan inode %lu! e2fsck was run?", ino); - printk(KERN_NOTICE "ext4_test_bit(bit=%d, block=%llu) = %d\n", + printk(KERN_WARNING "ext4_test_bit(bit=%d, block=%llu) = %d\n", bit, (unsigned long long)bitmap_bh->b_blocknr, ext4_test_bit(bit, bitmap_bh->b_data)); - printk(KERN_NOTICE "inode=%p\n", inode); + printk(KERN_WARNING "inode=%p\n", inode); if (inode) { - printk(KERN_NOTICE "is_bad_inode(inode)=%d\n", + printk(KERN_WARNING "is_bad_inode(inode)=%d\n", is_bad_inode(inode)); - printk(KERN_NOTICE "NEXT_ORPHAN(inode)=%u\n", + printk(KERN_WARNING "NEXT_ORPHAN(inode)=%u\n", NEXT_ORPHAN(inode)); - printk(KERN_NOTICE "max_ino=%lu\n", max_ino); - printk(KERN_NOTICE "i_nlink=%u\n", inode->i_nlink); + printk(KERN_WARNING "max_ino=%lu\n", max_ino); + printk(KERN_WARNING "i_nlink=%u\n", inode->i_nlink); /* Avoid freeing blocks if we got a bad deleted inode */ if (inode->i_nlink == 0) inode->i_blocks = 0; @@ -1137,7 +1148,7 @@ int ext4_init_inode_table(struct super_block *sb, ext4_group_t group, if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)) goto out; - handle = ext4_journal_start_sb(sb, 1); + handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); if (IS_ERR(handle)) { ret = PTR_ERR(handle); goto out; diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index 20862f9..c541ab8 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -146,6 +146,7 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth, struct super_block *sb = inode->i_sb; Indirect *p = chain; struct buffer_head *bh; + int ret = -EIO; *err = 0; /* i_data is not going away, no lock needed */ @@ -154,8 +155,10 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth, goto no_block; while (--depth) { bh = sb_getblk(sb, le32_to_cpu(p->key)); - if (unlikely(!bh)) + if (unlikely(!bh)) { + ret = -ENOMEM; goto failure; + } if (!bh_uptodate_or_lock(bh)) { if (bh_submit_read(bh) < 0) { @@ -177,7 +180,7 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth, return NULL; failure: - *err = -EIO; + *err = ret; no_block: return p; } @@ -355,9 +358,8 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode, * for the first direct block */ new_blocks[index] = current_block; - printk(KERN_INFO "%s returned more blocks than " + WARN(1, KERN_INFO "%s returned more blocks than " "requested\n", __func__); - WARN_ON(1); break; } } @@ -471,7 +473,7 @@ static int ext4_alloc_branch(handle_t *handle, struct inode *inode, */ bh = sb_getblk(inode->i_sb, new_blocks[n-1]); if (unlikely(!bh)) { - err = -EIO; + err = -ENOMEM; goto failed; } @@ -789,7 +791,7 @@ ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb, if (final_size > inode->i_size) { /* Credits for sb + inode write */ - handle = ext4_journal_start(inode, 2); + handle = ext4_journal_start(inode, EXT4_HT_INODE, 2); if (IS_ERR(handle)) { ret = PTR_ERR(handle); goto out; @@ -849,7 +851,7 @@ locked: int err; /* Credits for sb + inode write */ - handle = ext4_journal_start(inode, 2); + handle = ext4_journal_start(inode, EXT4_HT_INODE, 2); if (IS_ERR(handle)) { /* This is really bad luck. We've written the data * but cannot extend i_size. Bail out and pretend @@ -948,7 +950,8 @@ static handle_t *start_transaction(struct inode *inode) { handle_t *result; - result = ext4_journal_start(inode, ext4_blocks_for_truncate(inode)); + result = ext4_journal_start(inode, EXT4_HT_TRUNCATE, + ext4_blocks_for_truncate(inode)); if (!IS_ERR(result)) return result; @@ -1515,3 +1518,243 @@ out_stop: trace_ext4_truncate_exit(inode); } +static int free_hole_blocks(handle_t *handle, struct inode *inode, + struct buffer_head *parent_bh, __le32 *i_data, + int level, ext4_lblk_t first, + ext4_lblk_t count, int max) +{ + struct buffer_head *bh = NULL; + int addr_per_block = EXT4_ADDR_PER_BLOCK(inode->i_sb); + int ret = 0; + int i, inc; + ext4_lblk_t offset; + __le32 blk; + + inc = 1 << ((EXT4_BLOCK_SIZE_BITS(inode->i_sb) - 2) * level); + for (i = 0, offset = 0; i < max; i++, i_data++, offset += inc) { + if (offset >= count + first) + break; + if (*i_data == 0 || (offset + inc) <= first) + continue; + blk = *i_data; + if (level > 0) { + ext4_lblk_t first2; + bh = sb_bread(inode->i_sb, blk); + if (!bh) { + EXT4_ERROR_INODE_BLOCK(inode, blk, + "Read failure"); + return -EIO; + } + first2 = (first > offset) ? first - offset : 0; + ret = free_hole_blocks(handle, inode, bh, + (__le32 *)bh->b_data, level - 1, + first2, count - offset, + inode->i_sb->s_blocksize >> 2); + if (ret) { + brelse(bh); + goto err; + } + } + if (level == 0 || + (bh && all_zeroes((__le32 *)bh->b_data, + (__le32 *)bh->b_data + addr_per_block))) { + ext4_free_data(handle, inode, parent_bh, &blk, &blk+1); + *i_data = 0; + } + brelse(bh); + bh = NULL; + } + +err: + return ret; +} + +static int ext4_free_hole_blocks(handle_t *handle, struct inode *inode, + ext4_lblk_t first, ext4_lblk_t stop) +{ + int addr_per_block = EXT4_ADDR_PER_BLOCK(inode->i_sb); + int level, ret = 0; + int num = EXT4_NDIR_BLOCKS; + ext4_lblk_t count, max = EXT4_NDIR_BLOCKS; + __le32 *i_data = EXT4_I(inode)->i_data; + + count = stop - first; + for (level = 0; level < 4; level++, max *= addr_per_block) { + if (first < max) { + ret = free_hole_blocks(handle, inode, NULL, i_data, + level, first, count, num); + if (ret) + goto err; + if (count > max - first) + count -= max - first; + else + break; + first = 0; + } else { + first -= max; + } + i_data += num; + if (level == 0) { + num = 1; + max = 1; + } + } + +err: + return ret; +} + +int ext4_ind_punch_hole(struct file *file, loff_t offset, loff_t length) +{ + struct inode *inode = file->f_path.dentry->d_inode; + struct super_block *sb = inode->i_sb; + ext4_lblk_t first_block, stop_block; + struct address_space *mapping = inode->i_mapping; + handle_t *handle = NULL; + loff_t first_page, last_page, page_len; + loff_t first_page_offset, last_page_offset; + int err = 0; + + /* + * Write out all dirty pages to avoid race conditions + * Then release them. + */ + if (mapping->nrpages && mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) { + err = filemap_write_and_wait_range(mapping, + offset, offset + length - 1); + if (err) + return err; + } + + mutex_lock(&inode->i_mutex); + /* It's not possible punch hole on append only file */ + if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) { + err = -EPERM; + goto out_mutex; + } + if (IS_SWAPFILE(inode)) { + err = -ETXTBSY; + goto out_mutex; + } + + /* No need to punch hole beyond i_size */ + if (offset >= inode->i_size) + goto out_mutex; + + /* + * If the hole extents beyond i_size, set the hole + * to end after the page that contains i_size + */ + if (offset + length > inode->i_size) { + length = inode->i_size + + PAGE_CACHE_SIZE - (inode->i_size & (PAGE_CACHE_SIZE - 1)) - + offset; + } + + first_page = (offset + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + last_page = (offset + length) >> PAGE_CACHE_SHIFT; + + first_page_offset = first_page << PAGE_CACHE_SHIFT; + last_page_offset = last_page << PAGE_CACHE_SHIFT; + + /* Now release the pages */ + if (last_page_offset > first_page_offset) { + truncate_pagecache_range(inode, first_page_offset, + last_page_offset - 1); + } + + /* Wait all existing dio works, newcomers will block on i_mutex */ + inode_dio_wait(inode); + + handle = start_transaction(inode); + if (IS_ERR(handle)) + goto out_mutex; + + /* + * Now we need to zero out the non-page-aligned data in the + * pages at the start and tail of the hole, and unmap the buffer + * heads for the block aligned regions of the page that were + * completely zerod. + */ + if (first_page > last_page) { + /* + * If the file space being truncated is contained within a page + * just zero out and unmap the middle of that page + */ + err = ext4_discard_partial_page_buffers(handle, + mapping, offset, length, 0); + if (err) + goto out; + } else { + /* + * Zero out and unmap the paritial page that contains + * the start of the hole + */ + page_len = first_page_offset - offset; + if (page_len > 0) { + err = ext4_discard_partial_page_buffers(handle, mapping, + offset, page_len, 0); + if (err) + goto out; + } + + /* + * Zero out and unmap the partial page that contains + * the end of the hole + */ + page_len = offset + length - last_page_offset; + if (page_len > 0) { + err = ext4_discard_partial_page_buffers(handle, mapping, + last_page_offset, page_len, 0); + if (err) + goto out; + } + } + + /* + * If i_size contained in the last page, we need to + * unmap and zero the paritial page after i_size + */ + if (inode->i_size >> PAGE_CACHE_SHIFT == last_page && + inode->i_size % PAGE_CACHE_SIZE != 0) { + page_len = PAGE_CACHE_SIZE - + (inode->i_size & (PAGE_CACHE_SIZE - 1)); + if (page_len > 0) { + err = ext4_discard_partial_page_buffers(handle, + mapping, inode->i_size, page_len, 0); + if (err) + goto out; + } + } + + first_block = (offset + sb->s_blocksize - 1) >> + EXT4_BLOCK_SIZE_BITS(sb); + stop_block = (offset + length) >> EXT4_BLOCK_SIZE_BITS(sb); + + if (first_block >= stop_block) + goto out; + + down_write(&EXT4_I(inode)->i_data_sem); + ext4_discard_preallocations(inode); + + err = ext4_es_remove_extent(inode, first_block, + stop_block - first_block); + err = ext4_free_hole_blocks(handle, inode, first_block, stop_block); + + ext4_discard_preallocations(inode); + + if (IS_SYNC(inode)) + ext4_handle_sync(handle); + + up_write(&EXT4_I(inode)->i_data_sem); + +out: + inode->i_mtime = inode->i_ctime = ext4_current_time(inode); + ext4_mark_inode_dirty(handle, inode); + ext4_journal_stop(handle); + +out_mutex: + mutex_unlock(&inode->i_mutex); + + return err; +} diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index 387c47c..bc5f871 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -545,7 +545,7 @@ static int ext4_convert_inline_data_to_extent(struct address_space *mapping, return ret; retry: - handle = ext4_journal_start(inode, needed_blocks); + handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, needed_blocks); if (IS_ERR(handle)) { ret = PTR_ERR(handle); handle = NULL; @@ -657,7 +657,7 @@ int ext4_try_to_write_inline_data(struct address_space *mapping, * The possible write could happen in the inode, * so try to reserve the space in inode first. */ - handle = ext4_journal_start(inode, 1); + handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); if (IS_ERR(handle)) { ret = PTR_ERR(handle); handle = NULL; @@ -853,7 +853,7 @@ int ext4_da_write_inline_data_begin(struct address_space *mapping, if (ret) return ret; - handle = ext4_journal_start(inode, 1); + handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); if (IS_ERR(handle)) { ret = PTR_ERR(handle); handle = NULL; @@ -1188,7 +1188,7 @@ static int ext4_convert_inline_data_nolock(handle_t *handle, data_bh = sb_getblk(inode->i_sb, map.m_pblk); if (!data_bh) { - error = -EIO; + error = -ENOMEM; goto out_restore; } @@ -1770,7 +1770,7 @@ void ext4_inline_data_truncate(struct inode *inode, int *has_inline) needed_blocks = ext4_writepage_trans_blocks(inode); - handle = ext4_journal_start(inode, needed_blocks); + handle = ext4_journal_start(inode, EXT4_HT_INODE, needed_blocks); if (IS_ERR(handle)) return; @@ -1862,7 +1862,7 @@ int ext4_convert_inline_data(struct inode *inode) if (error) return error; - handle = ext4_journal_start(inode, needed_blocks); + handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, needed_blocks); if (IS_ERR(handle)) { error = PTR_ERR(handle); goto out_free; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index cd818d8b..88049d8 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -132,10 +132,6 @@ static inline int ext4_begin_ordered_truncate(struct inode *inode, } static void ext4_invalidatepage(struct page *page, unsigned long offset); -static int noalloc_get_block_write(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create); -static int ext4_set_bh_endio(struct buffer_head *bh, struct inode *inode); -static void ext4_end_io_buffer_write(struct buffer_head *bh, int uptodate); static int __ext4_journalled_writepage(struct page *page, unsigned int len); static int ext4_bh_delay_or_unwritten(handle_t *handle, struct buffer_head *bh); static int ext4_discard_partial_page_buffers_no_lock(handle_t *handle, @@ -238,7 +234,8 @@ void ext4_evict_inode(struct inode *inode) * protection against it */ sb_start_intwrite(inode->i_sb); - handle = ext4_journal_start(inode, ext4_blocks_for_truncate(inode)+3); + handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, + ext4_blocks_for_truncate(inode)+3); if (IS_ERR(handle)) { ext4_std_error(inode->i_sb, PTR_ERR(handle)); /* @@ -346,7 +343,7 @@ void ext4_da_update_reserve_space(struct inode *inode, spin_lock(&ei->i_block_reservation_lock); trace_ext4_da_update_reserve_space(inode, used, quota_claim); if (unlikely(used > ei->i_reserved_data_blocks)) { - ext4_msg(inode->i_sb, KERN_NOTICE, "%s: ino %lu, used %d " + ext4_warning(inode->i_sb, "%s: ino %lu, used %d " "with only %d reserved data blocks", __func__, inode->i_ino, used, ei->i_reserved_data_blocks); @@ -355,10 +352,12 @@ void ext4_da_update_reserve_space(struct inode *inode, } if (unlikely(ei->i_allocated_meta_blocks > ei->i_reserved_meta_blocks)) { - ext4_msg(inode->i_sb, KERN_NOTICE, "%s: ino %lu, allocated %d " - "with only %d reserved metadata blocks\n", __func__, - inode->i_ino, ei->i_allocated_meta_blocks, - ei->i_reserved_meta_blocks); + ext4_warning(inode->i_sb, "ino %lu, allocated %d " + "with only %d reserved metadata blocks " + "(releasing %d blocks with reserved %d data blocks)", + inode->i_ino, ei->i_allocated_meta_blocks, + ei->i_reserved_meta_blocks, used, + ei->i_reserved_data_blocks); WARN_ON(1); ei->i_allocated_meta_blocks = ei->i_reserved_meta_blocks; } @@ -508,12 +507,33 @@ static pgoff_t ext4_num_dirty_pages(struct inode *inode, pgoff_t idx, int ext4_map_blocks(handle_t *handle, struct inode *inode, struct ext4_map_blocks *map, int flags) { + struct extent_status es; int retval; map->m_flags = 0; ext_debug("ext4_map_blocks(): inode %lu, flag %d, max_blocks %u," "logical block %lu\n", inode->i_ino, flags, map->m_len, (unsigned long) map->m_lblk); + + /* Lookup extent status tree firstly */ + if (ext4_es_lookup_extent(inode, map->m_lblk, &es)) { + if (ext4_es_is_written(&es) || ext4_es_is_unwritten(&es)) { + map->m_pblk = ext4_es_pblock(&es) + + map->m_lblk - es.es_lblk; + map->m_flags |= ext4_es_is_written(&es) ? + EXT4_MAP_MAPPED : EXT4_MAP_UNWRITTEN; + retval = es.es_len - (map->m_lblk - es.es_lblk); + if (retval > map->m_len) + retval = map->m_len; + map->m_len = retval; + } else if (ext4_es_is_delayed(&es) || ext4_es_is_hole(&es)) { + retval = 0; + } else { + BUG_ON(1); + } + goto found; + } + /* * Try to see if we can get the block without requesting a new * file system block. @@ -527,20 +547,27 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, retval = ext4_ind_map_blocks(handle, inode, map, flags & EXT4_GET_BLOCKS_KEEP_SIZE); } + if (retval > 0) { + int ret; + unsigned long long status; + + status = map->m_flags & EXT4_MAP_UNWRITTEN ? + EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN; + if (!(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) && + ext4_find_delalloc_range(inode, map->m_lblk, + map->m_lblk + map->m_len - 1)) + status |= EXTENT_STATUS_DELAYED; + ret = ext4_es_insert_extent(inode, map->m_lblk, + map->m_len, map->m_pblk, status); + if (ret < 0) + retval = ret; + } if (!(flags & EXT4_GET_BLOCKS_NO_LOCK)) up_read((&EXT4_I(inode)->i_data_sem)); +found: if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) { - int ret; - if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) { - /* delayed alloc may be allocated by fallocate and - * coverted to initialized by directIO. - * we need to handle delayed extent here. - */ - down_write((&EXT4_I(inode)->i_data_sem)); - goto delayed_mapped; - } - ret = check_block_validity(inode, map); + int ret = check_block_validity(inode, map); if (ret != 0) return ret; } @@ -560,16 +587,10 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, return retval; /* - * When we call get_blocks without the create flag, the - * BH_Unwritten flag could have gotten set if the blocks - * requested were part of a uninitialized extent. We need to - * clear this flag now that we are committed to convert all or - * part of the uninitialized extent to be an initialized - * extent. This is because we need to avoid the combination - * of BH_Unwritten and BH_Mapped flags being simultaneously - * set on the buffer_head. + * Here we clear m_flags because after allocating an new extent, + * it will be set again. */ - map->m_flags &= ~EXT4_MAP_UNWRITTEN; + map->m_flags &= ~EXT4_MAP_FLAGS; /* * New blocks allocate and/or writing to uninitialized extent @@ -615,18 +636,23 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)) ext4_da_update_reserve_space(inode, retval, 1); } - if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) { + if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED); - if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) { - int ret; -delayed_mapped: - /* delayed allocation blocks has been allocated */ - ret = ext4_es_remove_extent(inode, map->m_lblk, - map->m_len); - if (ret < 0) - retval = ret; - } + if (retval > 0) { + int ret; + unsigned long long status; + + status = map->m_flags & EXT4_MAP_UNWRITTEN ? + EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN; + if (!(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) && + ext4_find_delalloc_range(inode, map->m_lblk, + map->m_lblk + map->m_len - 1)) + status |= EXTENT_STATUS_DELAYED; + ret = ext4_es_insert_extent(inode, map->m_lblk, map->m_len, + map->m_pblk, status); + if (ret < 0) + retval = ret; } up_write((&EXT4_I(inode)->i_data_sem)); @@ -660,7 +686,8 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock, if (map.m_len > DIO_MAX_BLOCKS) map.m_len = DIO_MAX_BLOCKS; dio_credits = ext4_chunk_trans_blocks(inode, map.m_len); - handle = ext4_journal_start(inode, dio_credits); + handle = ext4_journal_start(inode, EXT4_HT_MAP_BLOCKS, + dio_credits); if (IS_ERR(handle)) { ret = PTR_ERR(handle); return ret; @@ -707,14 +734,16 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode, /* ensure we send some value back into *errp */ *errp = 0; + if (create && err == 0) + err = -ENOSPC; /* should never happen */ if (err < 0) *errp = err; if (err <= 0) return NULL; bh = sb_getblk(inode->i_sb, map.m_pblk); - if (!bh) { - *errp = -EIO; + if (unlikely(!bh)) { + *errp = -ENOMEM; return NULL; } if (map.m_flags & EXT4_MAP_NEW) { @@ -808,11 +837,10 @@ int ext4_walk_page_buffers(handle_t *handle, * and the commit_write(). So doing the jbd2_journal_start at the start of * prepare_write() is the right place. * - * Also, this function can nest inside ext4_writepage() -> - * block_write_full_page(). In that case, we *know* that ext4_writepage() - * has generated enough buffer credits to do the whole page. So we won't - * block on the journal in that case, which is good, because the caller may - * be PF_MEMALLOC. + * Also, this function can nest inside ext4_writepage(). In that case, we + * *know* that ext4_writepage() has generated enough buffer credits to do the + * whole page. So we won't block on the journal in that case, which is good, + * because the caller may be PF_MEMALLOC. * * By accident, ext4 can be reentered when a transaction is open via * quota file writes. If we were to commit the transaction while thus @@ -878,32 +906,40 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping, ret = ext4_try_to_write_inline_data(mapping, inode, pos, len, flags, pagep); if (ret < 0) - goto out; - if (ret == 1) { - ret = 0; - goto out; - } + return ret; + if (ret == 1) + return 0; } -retry: - handle = ext4_journal_start(inode, needed_blocks); + /* + * grab_cache_page_write_begin() can take a long time if the + * system is thrashing due to memory pressure, or if the page + * is being written back. So grab it first before we start + * the transaction handle. This also allows us to allocate + * the page (if needed) without using GFP_NOFS. + */ +retry_grab: + page = grab_cache_page_write_begin(mapping, index, flags); + if (!page) + return -ENOMEM; + unlock_page(page); + +retry_journal: + handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, needed_blocks); if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - goto out; + page_cache_release(page); + return PTR_ERR(handle); } - /* We cannot recurse into the filesystem as the transaction is already - * started */ - flags |= AOP_FLAG_NOFS; - - page = grab_cache_page_write_begin(mapping, index, flags); - if (!page) { + lock_page(page); + if (page->mapping != mapping) { + /* The page got truncated from under us */ + unlock_page(page); + page_cache_release(page); ext4_journal_stop(handle); - ret = -ENOMEM; - goto out; + goto retry_grab; } - - *pagep = page; + wait_on_page_writeback(page); if (ext4_should_dioread_nolock(inode)) ret = __block_write_begin(page, pos, len, ext4_get_block_write); @@ -918,7 +954,6 @@ retry: if (ret) { unlock_page(page); - page_cache_release(page); /* * __block_write_begin may have instantiated a few blocks * outside i_size. Trim these off again. Don't need @@ -942,11 +977,14 @@ retry: if (inode->i_nlink) ext4_orphan_del(NULL, inode); } - } - if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) - goto retry; -out: + if (ret == -ENOSPC && + ext4_should_retry_alloc(inode->i_sb, &retries)) + goto retry_journal; + page_cache_release(page); + return ret; + } + *pagep = page; return ret; } @@ -1256,7 +1294,7 @@ static void ext4_da_release_space(struct inode *inode, int to_free) * function is called from invalidate page, it's * harmless to return without any action. */ - ext4_msg(inode->i_sb, KERN_NOTICE, "ext4_da_release_space: " + ext4_warning(inode->i_sb, "ext4_da_release_space: " "ino %lu, to_free %d with only %d reserved " "data blocks", inode->i_ino, to_free, ei->i_reserved_data_blocks); @@ -1357,7 +1395,6 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd, loff_t size = i_size_read(inode); unsigned int len, block_start; struct buffer_head *bh, *page_bufs = NULL; - int journal_data = ext4_should_journal_data(inode); sector_t pblock = 0, cur_logical = 0; struct ext4_io_submit io_submit; @@ -1378,7 +1415,7 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd, if (nr_pages == 0) break; for (i = 0; i < nr_pages; i++) { - int commit_write = 0, skip_page = 0; + int skip_page = 0; struct page *page = pvec.pages[i]; index = page->index; @@ -1400,27 +1437,9 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd, BUG_ON(!PageLocked(page)); BUG_ON(PageWriteback(page)); - /* - * If the page does not have buffers (for - * whatever reason), try to create them using - * __block_write_begin. If this fails, - * skip the page and move on. - */ - if (!page_has_buffers(page)) { - if (__block_write_begin(page, 0, len, - noalloc_get_block_write)) { - skip_page: - unlock_page(page); - continue; - } - commit_write = 1; - } - bh = page_bufs = page_buffers(page); block_start = 0; do { - if (!bh) - goto skip_page; if (map && (cur_logical >= map->m_lblk) && (cur_logical <= (map->m_lblk + (map->m_len - 1)))) { @@ -1448,33 +1467,14 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd, pblock++; } while (bh != page_bufs); - if (skip_page) - goto skip_page; - - if (commit_write) - /* mark the buffer_heads as dirty & uptodate */ - block_commit_write(page, 0, len); + if (skip_page) { + unlock_page(page); + continue; + } clear_page_dirty_for_io(page); - /* - * Delalloc doesn't support data journalling, - * but eventually maybe we'll lift this - * restriction. - */ - if (unlikely(journal_data && PageChecked(page))) - err = __ext4_journalled_writepage(page, len); - else if (test_opt(inode->i_sb, MBLK_IO_SUBMIT)) - err = ext4_bio_write_page(&io_submit, page, - len, mpd->wbc); - else if (buffer_uninit(page_bufs)) { - ext4_set_bh_endio(page_bufs, inode); - err = block_write_full_page_endio(page, - noalloc_get_block_write, - mpd->wbc, ext4_end_io_buffer_write); - } else - err = block_write_full_page(page, - noalloc_get_block_write, mpd->wbc); - + err = ext4_bio_write_page(&io_submit, page, len, + mpd->wbc); if (!err) mpd->pages_written++; /* @@ -1640,7 +1640,7 @@ static void mpage_da_map_and_submit(struct mpage_da_data *mpd) (unsigned long long) next, mpd->b_size >> mpd->inode->i_blkbits, err); ext4_msg(sb, KERN_CRIT, - "This should not happen!! Data will be lost\n"); + "This should not happen!! Data will be lost"); if (err == -ENOSPC) ext4_print_free_blocks(mpd->inode); } @@ -1690,16 +1690,16 @@ submit_io: * * @mpd->lbh - extent of blocks * @logical - logical number of the block in the file - * @bh - bh of the block (used to access block's state) + * @b_state - b_state of the buffer head added * * the function is used to collect contig. blocks in same state */ -static void mpage_add_bh_to_extent(struct mpage_da_data *mpd, - sector_t logical, size_t b_size, +static void mpage_add_bh_to_extent(struct mpage_da_data *mpd, sector_t logical, unsigned long b_state) { sector_t next; - int nrblocks = mpd->b_size >> mpd->inode->i_blkbits; + int blkbits = mpd->inode->i_blkbits; + int nrblocks = mpd->b_size >> blkbits; /* * XXX Don't go larger than mballoc is willing to allocate @@ -1707,11 +1707,11 @@ static void mpage_add_bh_to_extent(struct mpage_da_data *mpd, * mpage_da_submit_io() into this function and then call * ext4_map_blocks() multiple times in a loop */ - if (nrblocks >= 8*1024*1024/mpd->inode->i_sb->s_blocksize) + if (nrblocks >= (8*1024*1024 >> blkbits)) goto flush_it; - /* check if thereserved journal credits might overflow */ - if (!(ext4_test_inode_flag(mpd->inode, EXT4_INODE_EXTENTS))) { + /* check if the reserved journal credits might overflow */ + if (!ext4_test_inode_flag(mpd->inode, EXT4_INODE_EXTENTS)) { if (nrblocks >= EXT4_MAX_TRANS_DATA) { /* * With non-extent format we are limited by the journal @@ -1720,16 +1720,6 @@ static void mpage_add_bh_to_extent(struct mpage_da_data *mpd, * nrblocks. So limit nrblocks. */ goto flush_it; - } else if ((nrblocks + (b_size >> mpd->inode->i_blkbits)) > - EXT4_MAX_TRANS_DATA) { - /* - * Adding the new buffer_head would make it cross the - * allowed limit for which we have journal credit - * reserved. So limit the new bh->b_size - */ - b_size = (EXT4_MAX_TRANS_DATA - nrblocks) << - mpd->inode->i_blkbits; - /* we will do mpage_da_submit_io in the next loop */ } } /* @@ -1737,7 +1727,7 @@ static void mpage_add_bh_to_extent(struct mpage_da_data *mpd, */ if (mpd->b_size == 0) { mpd->b_blocknr = logical; - mpd->b_size = b_size; + mpd->b_size = 1 << blkbits; mpd->b_state = b_state & BH_FLAGS; return; } @@ -1747,7 +1737,7 @@ static void mpage_add_bh_to_extent(struct mpage_da_data *mpd, * Can we merge the block to our big extent? */ if (logical == next && (b_state & BH_FLAGS) == mpd->b_state) { - mpd->b_size += b_size; + mpd->b_size += 1 << blkbits; return; } @@ -1775,6 +1765,7 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, struct ext4_map_blocks *map, struct buffer_head *bh) { + struct extent_status es; int retval; sector_t invalid_block = ~((sector_t) 0xffff); @@ -1785,6 +1776,42 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, ext_debug("ext4_da_map_blocks(): inode %lu, max_blocks %u," "logical block %lu\n", inode->i_ino, map->m_len, (unsigned long) map->m_lblk); + + /* Lookup extent status tree firstly */ + if (ext4_es_lookup_extent(inode, iblock, &es)) { + + if (ext4_es_is_hole(&es)) { + retval = 0; + down_read((&EXT4_I(inode)->i_data_sem)); + goto add_delayed; + } + + /* + * Delayed extent could be allocated by fallocate. + * So we need to check it. + */ + if (ext4_es_is_delayed(&es) && !ext4_es_is_unwritten(&es)) { + map_bh(bh, inode->i_sb, invalid_block); + set_buffer_new(bh); + set_buffer_delay(bh); + return 0; + } + + map->m_pblk = ext4_es_pblock(&es) + iblock - es.es_lblk; + retval = es.es_len - (iblock - es.es_lblk); + if (retval > map->m_len) + retval = map->m_len; + map->m_len = retval; + if (ext4_es_is_written(&es)) + map->m_flags |= EXT4_MAP_MAPPED; + else if (ext4_es_is_unwritten(&es)) + map->m_flags |= EXT4_MAP_UNWRITTEN; + else + BUG_ON(1); + + return retval; + } + /* * Try to see if we can get the block without requesting a new * file system block. @@ -1803,11 +1830,15 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, map->m_flags |= EXT4_MAP_FROM_CLUSTER; retval = 0; } else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) - retval = ext4_ext_map_blocks(NULL, inode, map, 0); + retval = ext4_ext_map_blocks(NULL, inode, map, + EXT4_GET_BLOCKS_NO_PUT_HOLE); else - retval = ext4_ind_map_blocks(NULL, inode, map, 0); + retval = ext4_ind_map_blocks(NULL, inode, map, + EXT4_GET_BLOCKS_NO_PUT_HOLE); +add_delayed: if (retval == 0) { + int ret; /* * XXX: __block_prepare_write() unmaps passed block, * is it OK? @@ -1815,15 +1846,20 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, /* If the block was allocated from previously allocated cluster, * then we dont need to reserve it again. */ if (!(map->m_flags & EXT4_MAP_FROM_CLUSTER)) { - retval = ext4_da_reserve_space(inode, iblock); - if (retval) + ret = ext4_da_reserve_space(inode, iblock); + if (ret) { /* not enough space to reserve */ + retval = ret; goto out_unlock; + } } - retval = ext4_es_insert_extent(inode, map->m_lblk, map->m_len); - if (retval) + ret = ext4_es_insert_extent(inode, map->m_lblk, map->m_len, + ~0, EXTENT_STATUS_DELAYED); + if (ret) { + retval = ret; goto out_unlock; + } /* Clear EXT4_MAP_FROM_CLUSTER flag since its purpose is served * and it should not appear on the bh->b_state. @@ -1833,6 +1869,16 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, map_bh(bh, inode->i_sb, invalid_block); set_buffer_new(bh); set_buffer_delay(bh); + } else if (retval > 0) { + int ret; + unsigned long long status; + + status = map->m_flags & EXT4_MAP_UNWRITTEN ? + EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN; + ret = ext4_es_insert_extent(inode, map->m_lblk, map->m_len, + map->m_pblk, status); + if (ret != 0) + retval = ret; } out_unlock: @@ -1890,27 +1936,6 @@ int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, return 0; } -/* - * This function is used as a standard get_block_t calback function - * when there is no desire to allocate any blocks. It is used as a - * callback function for block_write_begin() and block_write_full_page(). - * These functions should only try to map a single block at a time. - * - * Since this function doesn't do block allocations even if the caller - * requests it by passing in create=1, it is critically important that - * any caller checks to make sure that any buffer heads are returned - * by this function are either all already mapped or marked for - * delayed allocation before calling block_write_full_page(). Otherwise, - * b_blocknr could be left unitialized, and the page write functions will - * be taken by surprise. - */ -static int noalloc_get_block_write(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create) -{ - BUG_ON(bh_result->b_size != inode->i_sb->s_blocksize); - return _ext4_get_block(inode, iblock, bh_result, 0); -} - static int bget_one(handle_t *handle, struct buffer_head *bh) { get_bh(bh); @@ -1955,7 +1980,8 @@ static int __ext4_journalled_writepage(struct page *page, * references to buffers so we are safe */ unlock_page(page); - handle = ext4_journal_start(inode, ext4_writepage_trans_blocks(inode)); + handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, + ext4_writepage_trans_blocks(inode)); if (IS_ERR(handle)) { ret = PTR_ERR(handle); goto out; @@ -2035,11 +2061,12 @@ out: static int ext4_writepage(struct page *page, struct writeback_control *wbc) { - int ret = 0, commit_write = 0; + int ret = 0; loff_t size; unsigned int len; struct buffer_head *page_bufs = NULL; struct inode *inode = page->mapping->host; + struct ext4_io_submit io_submit; trace_ext4_writepage(page); size = i_size_read(inode); @@ -2048,39 +2075,29 @@ static int ext4_writepage(struct page *page, else len = PAGE_CACHE_SIZE; + page_bufs = page_buffers(page); /* - * If the page does not have buffers (for whatever reason), - * try to create them using __block_write_begin. If this - * fails, redirty the page and move on. + * We cannot do block allocation or other extent handling in this + * function. If there are buffers needing that, we have to redirty + * the page. But we may reach here when we do a journal commit via + * journal_submit_inode_data_buffers() and in that case we must write + * allocated buffers to achieve data=ordered mode guarantees. */ - if (!page_has_buffers(page)) { - if (__block_write_begin(page, 0, len, - noalloc_get_block_write)) { - redirty_page: - redirty_page_for_writepage(wbc, page); + if (ext4_walk_page_buffers(NULL, page_bufs, 0, len, NULL, + ext4_bh_delay_or_unwritten)) { + redirty_page_for_writepage(wbc, page); + if (current->flags & PF_MEMALLOC) { + /* + * For memory cleaning there's no point in writing only + * some buffers. So just bail out. Warn if we came here + * from direct reclaim. + */ + WARN_ON_ONCE((current->flags & (PF_MEMALLOC|PF_KSWAPD)) + == PF_MEMALLOC); unlock_page(page); return 0; } - commit_write = 1; } - page_bufs = page_buffers(page); - if (ext4_walk_page_buffers(NULL, page_bufs, 0, len, NULL, - ext4_bh_delay_or_unwritten)) { - /* - * We don't want to do block allocation, so redirty - * the page and return. We may reach here when we do - * a journal commit via journal_submit_inode_data_buffers. - * We can also reach here via shrink_page_list but it - * should never be for direct reclaim so warn if that - * happens - */ - WARN_ON_ONCE((current->flags & (PF_MEMALLOC|PF_KSWAPD)) == - PF_MEMALLOC); - goto redirty_page; - } - if (commit_write) - /* now mark the buffer_heads as dirty and uptodate */ - block_commit_write(page, 0, len); if (PageChecked(page) && ext4_should_journal_data(inode)) /* @@ -2089,14 +2106,9 @@ static int ext4_writepage(struct page *page, */ return __ext4_journalled_writepage(page, len); - if (buffer_uninit(page_bufs)) { - ext4_set_bh_endio(page_bufs, inode); - ret = block_write_full_page_endio(page, noalloc_get_block_write, - wbc, ext4_end_io_buffer_write); - } else - ret = block_write_full_page(page, noalloc_get_block_write, - wbc); - + memset(&io_submit, 0, sizeof(io_submit)); + ret = ext4_bio_write_page(&io_submit, page, len, wbc); + ext4_io_submit(&io_submit); return ret; } @@ -2228,51 +2240,38 @@ static int write_cache_pages_da(handle_t *handle, logical = (sector_t) page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); - if (!page_has_buffers(page)) { - mpage_add_bh_to_extent(mpd, logical, - PAGE_CACHE_SIZE, - (1 << BH_Dirty) | (1 << BH_Uptodate)); - if (mpd->io_done) - goto ret_extent_tail; - } else { + /* Add all dirty buffers to mpd */ + head = page_buffers(page); + bh = head; + do { + BUG_ON(buffer_locked(bh)); /* - * Page with regular buffer heads, - * just add all dirty ones + * We need to try to allocate unmapped blocks + * in the same page. Otherwise we won't make + * progress with the page in ext4_writepage */ - head = page_buffers(page); - bh = head; - do { - BUG_ON(buffer_locked(bh)); + if (ext4_bh_delay_or_unwritten(NULL, bh)) { + mpage_add_bh_to_extent(mpd, logical, + bh->b_state); + if (mpd->io_done) + goto ret_extent_tail; + } else if (buffer_dirty(bh) && + buffer_mapped(bh)) { /* - * We need to try to allocate - * unmapped blocks in the same page. - * Otherwise we won't make progress - * with the page in ext4_writepage + * mapped dirty buffer. We need to + * update the b_state because we look + * at b_state in mpage_da_map_blocks. + * We don't update b_size because if we + * find an unmapped buffer_head later + * we need to use the b_state flag of + * that buffer_head. */ - if (ext4_bh_delay_or_unwritten(NULL, bh)) { - mpage_add_bh_to_extent(mpd, logical, - bh->b_size, - bh->b_state); - if (mpd->io_done) - goto ret_extent_tail; - } else if (buffer_dirty(bh) && (buffer_mapped(bh))) { - /* - * mapped dirty buffer. We need - * to update the b_state - * because we look at b_state - * in mpage_da_map_blocks. We - * don't update b_size because - * if we find an unmapped - * buffer_head later we need to - * use the b_state flag of that - * buffer_head. - */ - if (mpd->b_size == 0) - mpd->b_state = bh->b_state & BH_FLAGS; - } - logical++; - } while ((bh = bh->b_this_page) != head); - } + if (mpd->b_size == 0) + mpd->b_state = + bh->b_state & BH_FLAGS; + } + logical++; + } while ((bh = bh->b_this_page) != head); if (nr_to_write > 0) { nr_to_write--; @@ -2413,7 +2412,8 @@ retry: needed_blocks = ext4_da_writepages_trans_blocks(inode); /* start a new transaction*/ - handle = ext4_journal_start(inode, needed_blocks); + handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, + needed_blocks); if (IS_ERR(handle)) { ret = PTR_ERR(handle); ext4_msg(inode->i_sb, KERN_CRIT, "%s: jbd2_start: " @@ -2555,42 +2555,52 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping, pos, len, flags, pagep, fsdata); if (ret < 0) - goto out; - if (ret == 1) { - ret = 0; - goto out; - } + return ret; + if (ret == 1) + return 0; } -retry: + /* + * grab_cache_page_write_begin() can take a long time if the + * system is thrashing due to memory pressure, or if the page + * is being written back. So grab it first before we start + * the transaction handle. This also allows us to allocate + * the page (if needed) without using GFP_NOFS. + */ +retry_grab: + page = grab_cache_page_write_begin(mapping, index, flags); + if (!page) + return -ENOMEM; + unlock_page(page); + /* * With delayed allocation, we don't log the i_disksize update * if there is delayed block allocation. But we still need * to journalling the i_disksize update if writes to the end * of file which has an already mapped buffer. */ - handle = ext4_journal_start(inode, 1); +retry_journal: + handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, 1); if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - goto out; + page_cache_release(page); + return PTR_ERR(handle); } - /* We cannot recurse into the filesystem as the transaction is already - * started */ - flags |= AOP_FLAG_NOFS; - page = grab_cache_page_write_begin(mapping, index, flags); - if (!page) { + lock_page(page); + if (page->mapping != mapping) { + /* The page got truncated from under us */ + unlock_page(page); + page_cache_release(page); ext4_journal_stop(handle); - ret = -ENOMEM; - goto out; + goto retry_grab; } - *pagep = page; + /* In case writeback began while the page was unlocked */ + wait_on_page_writeback(page); ret = __block_write_begin(page, pos, len, ext4_da_get_block_prep); if (ret < 0) { unlock_page(page); ext4_journal_stop(handle); - page_cache_release(page); /* * block_write_begin may have instantiated a few blocks * outside i_size. Trim these off again. Don't need @@ -2598,11 +2608,16 @@ retry: */ if (pos + len > inode->i_size) ext4_truncate_failed_write(inode); + + if (ret == -ENOSPC && + ext4_should_retry_alloc(inode->i_sb, &retries)) + goto retry_journal; + + page_cache_release(page); + return ret; } - if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) - goto retry; -out: + *pagep = page; return ret; } @@ -2858,36 +2873,10 @@ ext4_readpages(struct file *file, struct address_space *mapping, return mpage_readpages(mapping, pages, nr_pages, ext4_get_block); } -static void ext4_invalidatepage_free_endio(struct page *page, unsigned long offset) -{ - struct buffer_head *head, *bh; - unsigned int curr_off = 0; - - if (!page_has_buffers(page)) - return; - head = bh = page_buffers(page); - do { - if (offset <= curr_off && test_clear_buffer_uninit(bh) - && bh->b_private) { - ext4_free_io_end(bh->b_private); - bh->b_private = NULL; - bh->b_end_io = NULL; - } - curr_off = curr_off + bh->b_size; - bh = bh->b_this_page; - } while (bh != head); -} - static void ext4_invalidatepage(struct page *page, unsigned long offset) { trace_ext4_invalidatepage(page, offset); - /* - * free any io_end structure allocated for buffers to be discarded - */ - if (ext4_should_dioread_nolock(page->mapping->host)) - ext4_invalidatepage_free_endio(page, offset); - /* No journalling happens on data buffers when this function is used */ WARN_ON(page_has_buffers(page) && buffer_jbd(page_buffers(page))); @@ -2977,9 +2966,9 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { ext4_free_io_end(io_end); out: + inode_dio_done(inode); if (is_async) aio_complete(iocb, ret, 0); - inode_dio_done(inode); return; } @@ -2993,65 +2982,6 @@ out: ext4_add_complete_io(io_end); } -static void ext4_end_io_buffer_write(struct buffer_head *bh, int uptodate) -{ - ext4_io_end_t *io_end = bh->b_private; - struct inode *inode; - - if (!test_clear_buffer_uninit(bh) || !io_end) - goto out; - - if (!(io_end->inode->i_sb->s_flags & MS_ACTIVE)) { - ext4_msg(io_end->inode->i_sb, KERN_INFO, - "sb umounted, discard end_io request for inode %lu", - io_end->inode->i_ino); - ext4_free_io_end(io_end); - goto out; - } - - /* - * It may be over-defensive here to check EXT4_IO_END_UNWRITTEN now, - * but being more careful is always safe for the future change. - */ - inode = io_end->inode; - ext4_set_io_unwritten_flag(inode, io_end); - ext4_add_complete_io(io_end); -out: - bh->b_private = NULL; - bh->b_end_io = NULL; - clear_buffer_uninit(bh); - end_buffer_async_write(bh, uptodate); -} - -static int ext4_set_bh_endio(struct buffer_head *bh, struct inode *inode) -{ - ext4_io_end_t *io_end; - struct page *page = bh->b_page; - loff_t offset = (sector_t)page->index << PAGE_CACHE_SHIFT; - size_t size = bh->b_size; - -retry: - io_end = ext4_init_io_end(inode, GFP_ATOMIC); - if (!io_end) { - pr_warn_ratelimited("%s: allocation fail\n", __func__); - schedule(); - goto retry; - } - io_end->offset = offset; - io_end->size = size; - /* - * We need to hold a reference to the page to make sure it - * doesn't get evicted before ext4_end_io_work() has a chance - * to convert the extent from written to unwritten. - */ - io_end->page = page; - get_page(io_end->page); - - bh->b_private = io_end; - bh->b_end_io = ext4_end_io_buffer_write; - return 0; -} - /* * For ext4 extent files, ext4 will do direct-io write to holes, * preallocated extents, and those write extend the file, no need to @@ -3557,16 +3487,16 @@ int ext4_punch_hole(struct file *file, loff_t offset, loff_t length) if (!S_ISREG(inode->i_mode)) return -EOPNOTSUPP; - if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) { - /* TODO: Add support for non extent hole punching */ - return -EOPNOTSUPP; - } + if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) + return ext4_ind_punch_hole(file, offset, length); if (EXT4_SB(inode->i_sb)->s_cluster_ratio > 1) { /* TODO: Add support for bigalloc file systems */ return -EOPNOTSUPP; } + trace_ext4_punch_hole(inode, offset, length); + return ext4_ext_punch_hole(file, offset, length); } @@ -3660,11 +3590,8 @@ static int __ext4_get_inode_loc(struct inode *inode, iloc->offset = (inode_offset % inodes_per_block) * EXT4_INODE_SIZE(sb); bh = sb_getblk(sb, block); - if (!bh) { - EXT4_ERROR_INODE_BLOCK(inode, block, - "unable to read itable block"); - return -EIO; - } + if (unlikely(!bh)) + return -ENOMEM; if (!buffer_uptodate(bh)) { lock_buffer(bh); @@ -3696,7 +3623,7 @@ static int __ext4_get_inode_loc(struct inode *inode, /* Is the inode bitmap in cache? */ bitmap_bh = sb_getblk(sb, ext4_inode_bitmap(sb, gdp)); - if (!bitmap_bh) + if (unlikely(!bitmap_bh)) goto make_io; /* @@ -4404,8 +4331,9 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) /* (user+group)*(old+new) structure, inode write (sb, * inode block, ? - but truncate inode update has it) */ - handle = ext4_journal_start(inode, (EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)+ - EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb))+3); + handle = ext4_journal_start(inode, EXT4_HT_QUOTA, + (EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb) + + EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb)) + 3); if (IS_ERR(handle)) { error = PTR_ERR(handle); goto err_out; @@ -4440,7 +4368,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) (attr->ia_size < inode->i_size)) { handle_t *handle; - handle = ext4_journal_start(inode, 3); + handle = ext4_journal_start(inode, EXT4_HT_INODE, 3); if (IS_ERR(handle)) { error = PTR_ERR(handle); goto err_out; @@ -4460,7 +4388,8 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) attr->ia_size); if (error) { /* Do as much error cleanup as possible */ - handle = ext4_journal_start(inode, 3); + handle = ext4_journal_start(inode, + EXT4_HT_INODE, 3); if (IS_ERR(handle)) { ext4_orphan_del(NULL, inode); goto err_out; @@ -4801,7 +4730,7 @@ void ext4_dirty_inode(struct inode *inode, int flags) { handle_t *handle; - handle = ext4_journal_start(inode, 2); + handle = ext4_journal_start(inode, EXT4_HT_INODE, 2); if (IS_ERR(handle)) goto out; @@ -4902,7 +4831,7 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val) /* Finally we can mark the inode as dirty. */ - handle = ext4_journal_start(inode, 1); + handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); if (IS_ERR(handle)) return PTR_ERR(handle); @@ -4980,7 +4909,8 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) else get_block = ext4_get_block; retry_alloc: - handle = ext4_journal_start(inode, ext4_writepage_trans_blocks(inode)); + handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, + ext4_writepage_trans_blocks(inode)); if (IS_ERR(handle)) { ret = VM_FAULT_SIGBUS; goto out; diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 5747f52..31f4f56 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -104,7 +104,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) } else if (oldflags & EXT4_EOFBLOCKS_FL) ext4_truncate(inode); - handle = ext4_journal_start(inode, 1); + handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); if (IS_ERR(handle)) { err = PTR_ERR(handle); goto flags_out; @@ -173,7 +173,7 @@ flags_out: } mutex_lock(&inode->i_mutex); - handle = ext4_journal_start(inode, 1); + handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); if (IS_ERR(handle)) { err = PTR_ERR(handle); goto unlock_out; @@ -313,6 +313,9 @@ mext_out: if (err == 0) err = err2; mnt_drop_write_file(filp); + if (!err && ext4_has_group_desc_csum(sb) && + test_opt(sb, INIT_INODE_TABLE)) + err = ext4_register_li_request(sb, input.group); group_add_out: ext4_resize_end(sb); return err; @@ -358,6 +361,7 @@ group_add_out: ext4_fsblk_t n_blocks_count; struct super_block *sb = inode->i_sb; int err = 0, err2 = 0; + ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { @@ -388,6 +392,11 @@ group_add_out: if (err == 0) err = err2; mnt_drop_write_file(filp); + if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && + ext4_has_group_desc_csum(sb) && + test_opt(sb, INIT_INODE_TABLE)) + err = ext4_register_li_request(sb, o_group); + resizefs_out: ext4_resize_end(sb); return err; diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 1bf6fe7..6540ebe 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -23,11 +23,18 @@ #include "ext4_jbd2.h" #include "mballoc.h" -#include <linux/debugfs.h> #include <linux/log2.h> +#include <linux/module.h> #include <linux/slab.h> #include <trace/events/ext4.h> +#ifdef CONFIG_EXT4_DEBUG +ushort ext4_mballoc_debug __read_mostly; + +module_param_named(mballoc_debug, ext4_mballoc_debug, ushort, 0644); +MODULE_PARM_DESC(mballoc_debug, "Debugging level for ext4's mballoc"); +#endif + /* * MUSTDO: * - test ext4_ext_search_left() and ext4_ext_search_right() @@ -1884,15 +1891,19 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac, case 0: BUG_ON(ac->ac_2order == 0); - if (grp->bb_largest_free_order < ac->ac_2order) - return 0; - /* Avoid using the first bg of a flexgroup for data files */ if ((ac->ac_flags & EXT4_MB_HINT_DATA) && (flex_size >= EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME) && ((group % flex_size) == 0)) return 0; + if ((ac->ac_2order > ac->ac_sb->s_blocksize_bits+1) || + (free / fragments) >= ac->ac_g_ex.fe_len) + return 1; + + if (grp->bb_largest_free_order < ac->ac_2order) + return 0; + return 1; case 1: if ((free / fragments) >= ac->ac_g_ex.fe_len) @@ -2007,7 +2018,7 @@ repeat: } ac->ac_groups_scanned++; - if (cr == 0) + if (cr == 0 && ac->ac_2order < sb->s_blocksize_bits+2) ext4_mb_simple_scan_group(ac, &e4b); else if (cr == 1 && sbi->s_stripe && !(ac->ac_g_ex.fe_len % sbi->s_stripe)) @@ -2656,40 +2667,6 @@ static void ext4_free_data_callback(struct super_block *sb, mb_debug(1, "freed %u blocks in %u structures\n", count, count2); } -#ifdef CONFIG_EXT4_DEBUG -u8 mb_enable_debug __read_mostly; - -static struct dentry *debugfs_dir; -static struct dentry *debugfs_debug; - -static void __init ext4_create_debugfs_entry(void) -{ - debugfs_dir = debugfs_create_dir("ext4", NULL); - if (debugfs_dir) - debugfs_debug = debugfs_create_u8("mballoc-debug", - S_IRUGO | S_IWUSR, - debugfs_dir, - &mb_enable_debug); -} - -static void ext4_remove_debugfs_entry(void) -{ - debugfs_remove(debugfs_debug); - debugfs_remove(debugfs_dir); -} - -#else - -static void __init ext4_create_debugfs_entry(void) -{ -} - -static void ext4_remove_debugfs_entry(void) -{ -} - -#endif - int __init ext4_init_mballoc(void) { ext4_pspace_cachep = KMEM_CACHE(ext4_prealloc_space, @@ -2711,7 +2688,6 @@ int __init ext4_init_mballoc(void) kmem_cache_destroy(ext4_ac_cachep); return -ENOMEM; } - ext4_create_debugfs_entry(); return 0; } @@ -2726,7 +2702,6 @@ void ext4_exit_mballoc(void) kmem_cache_destroy(ext4_ac_cachep); kmem_cache_destroy(ext4_free_data_cachep); ext4_groupinfo_destroy_slabs(); - ext4_remove_debugfs_entry(); } @@ -3872,7 +3847,7 @@ static void ext4_mb_show_ac(struct ext4_allocation_context *ac) struct super_block *sb = ac->ac_sb; ext4_group_t ngroups, i; - if (!mb_enable_debug || + if (!ext4_mballoc_debug || (EXT4_SB(sb)->s_mount_flags & EXT4_MF_FS_ABORTED)) return; @@ -4005,8 +3980,8 @@ ext4_mb_initialize_context(struct ext4_allocation_context *ac, len = ar->len; /* just a dirty hack to filter too big requests */ - if (len >= EXT4_CLUSTERS_PER_GROUP(sb) - 10) - len = EXT4_CLUSTERS_PER_GROUP(sb) - 10; + if (len >= EXT4_CLUSTERS_PER_GROUP(sb)) + len = EXT4_CLUSTERS_PER_GROUP(sb); /* start searching from the goal */ goal = ar->goal; @@ -4136,7 +4111,7 @@ static void ext4_mb_add_n_trim(struct ext4_allocation_context *ac) /* The max size of hash table is PREALLOC_TB_SIZE */ order = PREALLOC_TB_SIZE - 1; /* Add the prealloc space to lg */ - rcu_read_lock(); + spin_lock(&lg->lg_prealloc_lock); list_for_each_entry_rcu(tmp_pa, &lg->lg_prealloc_list[order], pa_inode_list) { spin_lock(&tmp_pa->pa_lock); @@ -4160,12 +4135,12 @@ static void ext4_mb_add_n_trim(struct ext4_allocation_context *ac) if (!added) list_add_tail_rcu(&pa->pa_inode_list, &lg->lg_prealloc_list[order]); - rcu_read_unlock(); + spin_unlock(&lg->lg_prealloc_lock); /* Now trim the list to be not more than 8 elements */ if (lg_prealloc_count > 8) { ext4_mb_discard_lg_preallocations(sb, lg, - order, lg_prealloc_count); + order, lg_prealloc_count); return; } return ; diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h index 3ccd889..08481ee 100644 --- a/fs/ext4/mballoc.h +++ b/fs/ext4/mballoc.h @@ -37,11 +37,11 @@ /* */ #ifdef CONFIG_EXT4_DEBUG -extern u8 mb_enable_debug; +extern ushort ext4_mballoc_debug; #define mb_debug(n, fmt, a...) \ do { \ - if ((n) <= mb_enable_debug) { \ + if ((n) <= ext4_mballoc_debug) { \ printk(KERN_DEBUG "(%s, %d): %s: ", \ __FILE__, __LINE__, __func__); \ printk(fmt, ## a); \ diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c index db8226d..480acf4 100644 --- a/fs/ext4/migrate.c +++ b/fs/ext4/migrate.c @@ -456,11 +456,14 @@ int ext4_ext_migrate(struct inode *inode) */ return retval; - handle = ext4_journal_start(inode, - EXT4_DATA_TRANS_BLOCKS(inode->i_sb) + - EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 + - EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb) - + 1); + /* + * Worst case we can touch the allocation bitmaps, a bgd + * block, and a block to link in the orphan list. We do need + * need to worry about credits for modifying the quota inode. + */ + handle = ext4_journal_start(inode, EXT4_HT_MIGRATE, + 4 + EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb)); + if (IS_ERR(handle)) { retval = PTR_ERR(handle); return retval; @@ -507,7 +510,7 @@ int ext4_ext_migrate(struct inode *inode) ext4_set_inode_state(inode, EXT4_STATE_EXT_MIGRATE); up_read((&EXT4_I(inode)->i_data_sem)); - handle = ext4_journal_start(inode, 1); + handle = ext4_journal_start(inode, EXT4_HT_MIGRATE, 1); if (IS_ERR(handle)) { /* * It is impossible to update on-disk structures without diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c index fe7c63f..f9b5515 100644 --- a/fs/ext4/mmp.c +++ b/fs/ext4/mmp.c @@ -80,6 +80,8 @@ static int read_mmp_block(struct super_block *sb, struct buffer_head **bh, * is not blocked in the elevator. */ if (!*bh) *bh = sb_getblk(sb, mmp_block); + if (!*bh) + return -ENOMEM; if (*bh) { get_bh(*bh); lock_buffer(*bh); @@ -91,7 +93,7 @@ static int read_mmp_block(struct super_block *sb, struct buffer_head **bh, *bh = NULL; } } - if (!*bh) { + if (unlikely(!*bh)) { ext4_warning(sb, "Error while reading MMP block %llu", mmp_block); return -EIO; diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index d9cc5ee..d78c33e 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -681,6 +681,8 @@ mext_replace_branches(handle_t *handle, struct inode *orig_inode, depth = ext_depth(donor_inode); dext = donor_path[depth].p_ext; + if (unlikely(!dext)) + goto missing_donor_extent; tmp_dext = *dext; *err = mext_calc_swap_extents(&tmp_dext, &tmp_oext, orig_off, @@ -691,7 +693,8 @@ mext_replace_branches(handle_t *handle, struct inode *orig_inode, /* Loop for the donor extents */ while (1) { /* The extent for donor must be found. */ - if (!dext) { + if (unlikely(!dext)) { + missing_donor_extent: EXT4_ERROR_INODE(donor_inode, "The extent for donor must be found"); *err = -EIO; @@ -761,9 +764,6 @@ out: kfree(donor_path); } - ext4_ext_invalidate_cache(orig_inode); - ext4_ext_invalidate_cache(donor_inode); - return replaced_count; } @@ -920,7 +920,7 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode, again: *err = 0; jblocks = ext4_writepage_trans_blocks(orig_inode) * 2; - handle = ext4_journal_start(orig_inode, jblocks); + handle = ext4_journal_start(orig_inode, EXT4_HT_MOVE_EXTENTS, jblocks); if (IS_ERR(handle)) { *err = PTR_ERR(handle); return 0; diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index cc9a512..2a7015d 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -50,34 +50,108 @@ static struct buffer_head *ext4_append(handle_t *handle, struct inode *inode, - ext4_lblk_t *block, int *err) + ext4_lblk_t *block) { struct buffer_head *bh; + int err = 0; if (unlikely(EXT4_SB(inode->i_sb)->s_max_dir_size_kb && ((inode->i_size >> 10) >= - EXT4_SB(inode->i_sb)->s_max_dir_size_kb))) { - *err = -ENOSPC; - return NULL; - } + EXT4_SB(inode->i_sb)->s_max_dir_size_kb))) + return ERR_PTR(-ENOSPC); *block = inode->i_size >> inode->i_sb->s_blocksize_bits; - bh = ext4_bread(handle, inode, *block, 1, err); - if (bh) { - inode->i_size += inode->i_sb->s_blocksize; - EXT4_I(inode)->i_disksize = inode->i_size; - *err = ext4_journal_get_write_access(handle, bh); - if (*err) { + bh = ext4_bread(handle, inode, *block, 1, &err); + if (!bh) + return ERR_PTR(err); + inode->i_size += inode->i_sb->s_blocksize; + EXT4_I(inode)->i_disksize = inode->i_size; + err = ext4_journal_get_write_access(handle, bh); + if (err) { + brelse(bh); + ext4_std_error(inode->i_sb, err); + return ERR_PTR(err); + } + return bh; +} + +static int ext4_dx_csum_verify(struct inode *inode, + struct ext4_dir_entry *dirent); + +typedef enum { + EITHER, INDEX, DIRENT +} dirblock_type_t; + +#define ext4_read_dirblock(inode, block, type) \ + __ext4_read_dirblock((inode), (block), (type), __LINE__) + +static struct buffer_head *__ext4_read_dirblock(struct inode *inode, + ext4_lblk_t block, + dirblock_type_t type, + unsigned int line) +{ + struct buffer_head *bh; + struct ext4_dir_entry *dirent; + int err = 0, is_dx_block = 0; + + bh = ext4_bread(NULL, inode, block, 0, &err); + if (!bh) { + if (err == 0) { + ext4_error_inode(inode, __func__, line, block, + "Directory hole found"); + return ERR_PTR(-EIO); + } + __ext4_warning(inode->i_sb, __func__, line, + "error reading directory block " + "(ino %lu, block %lu)", inode->i_ino, + (unsigned long) block); + return ERR_PTR(err); + } + dirent = (struct ext4_dir_entry *) bh->b_data; + /* Determine whether or not we have an index block */ + if (is_dx(inode)) { + if (block == 0) + is_dx_block = 1; + else if (ext4_rec_len_from_disk(dirent->rec_len, + inode->i_sb->s_blocksize) == + inode->i_sb->s_blocksize) + is_dx_block = 1; + } + if (!is_dx_block && type == INDEX) { + ext4_error_inode(inode, __func__, line, block, + "directory leaf block found instead of index block"); + return ERR_PTR(-EIO); + } + if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, + EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) || + buffer_verified(bh)) + return bh; + + /* + * An empty leaf block can get mistaken for a index block; for + * this reason, we can only check the index checksum when the + * caller is sure it should be an index block. + */ + if (is_dx_block && type == INDEX) { + if (ext4_dx_csum_verify(inode, dirent)) + set_buffer_verified(bh); + else { + ext4_error_inode(inode, __func__, line, block, + "Directory index failed checksum"); brelse(bh); - bh = NULL; + return ERR_PTR(-EIO); } } - if (!bh && !(*err)) { - *err = -EIO; - ext4_error(inode->i_sb, - "Directory hole detected on inode %lu\n", - inode->i_ino); + if (!is_dx_block) { + if (ext4_dirent_csum_verify(inode, dirent)) + set_buffer_verified(bh); + else { + ext4_error_inode(inode, __func__, line, block, + "Directory block failed checksum"); + brelse(bh); + return ERR_PTR(-EIO); + } } return bh; } @@ -603,9 +677,9 @@ dx_probe(const struct qstr *d_name, struct inode *dir, u32 hash; frame->bh = NULL; - if (!(bh = ext4_bread(NULL, dir, 0, 0, err))) { - if (*err == 0) - *err = ERR_BAD_DX_DIR; + bh = ext4_read_dirblock(dir, 0, INDEX); + if (IS_ERR(bh)) { + *err = PTR_ERR(bh); goto fail; } root = (struct dx_root *) bh->b_data; @@ -642,15 +716,6 @@ dx_probe(const struct qstr *d_name, struct inode *dir, goto fail; } - if (!buffer_verified(bh) && - !ext4_dx_csum_verify(dir, (struct ext4_dir_entry *)bh->b_data)) { - ext4_warning(dir->i_sb, "Root failed checksum"); - brelse(bh); - *err = ERR_BAD_DX_DIR; - goto fail; - } - set_buffer_verified(bh); - entries = (struct dx_entry *) (((char *)&root->info) + root->info.info_length); @@ -708,22 +773,12 @@ dx_probe(const struct qstr *d_name, struct inode *dir, frame->entries = entries; frame->at = at; if (!indirect--) return frame; - if (!(bh = ext4_bread(NULL, dir, dx_get_block(at), 0, err))) { - if (!(*err)) - *err = ERR_BAD_DX_DIR; - goto fail2; - } - at = entries = ((struct dx_node *) bh->b_data)->entries; - - if (!buffer_verified(bh) && - !ext4_dx_csum_verify(dir, - (struct ext4_dir_entry *)bh->b_data)) { - ext4_warning(dir->i_sb, "Node failed checksum"); - brelse(bh); - *err = ERR_BAD_DX_DIR; + bh = ext4_read_dirblock(dir, dx_get_block(at), INDEX); + if (IS_ERR(bh)) { + *err = PTR_ERR(bh); goto fail2; } - set_buffer_verified(bh); + entries = ((struct dx_node *) bh->b_data)->entries; if (dx_get_limit(entries) != dx_node_limit (dir)) { ext4_warning(dir->i_sb, @@ -782,7 +837,7 @@ static int ext4_htree_next_block(struct inode *dir, __u32 hash, { struct dx_frame *p; struct buffer_head *bh; - int err, num_frames = 0; + int num_frames = 0; __u32 bhash; p = frame; @@ -821,25 +876,9 @@ static int ext4_htree_next_block(struct inode *dir, __u32 hash, * block so no check is necessary */ while (num_frames--) { - if (!(bh = ext4_bread(NULL, dir, dx_get_block(p->at), - 0, &err))) { - if (!err) { - ext4_error(dir->i_sb, - "Directory hole detected on inode %lu\n", - dir->i_ino); - return -EIO; - } - return err; /* Failure */ - } - - if (!buffer_verified(bh) && - !ext4_dx_csum_verify(dir, - (struct ext4_dir_entry *)bh->b_data)) { - ext4_warning(dir->i_sb, "Node failed checksum"); - return -EIO; - } - set_buffer_verified(bh); - + bh = ext4_read_dirblock(dir, dx_get_block(p->at), INDEX); + if (IS_ERR(bh)) + return PTR_ERR(bh); p++; brelse(p->bh); p->bh = bh; @@ -865,20 +904,9 @@ static int htree_dirblock_to_tree(struct file *dir_file, dxtrace(printk(KERN_INFO "In htree dirblock_to_tree: block %lu\n", (unsigned long)block)); - if (!(bh = ext4_bread(NULL, dir, block, 0, &err))) { - if (!err) { - err = -EIO; - ext4_error(dir->i_sb, - "Directory hole detected on inode %lu\n", - dir->i_ino); - } - return err; - } - - if (!buffer_verified(bh) && - !ext4_dirent_csum_verify(dir, (struct ext4_dir_entry *)bh->b_data)) - return -EIO; - set_buffer_verified(bh); + bh = ext4_read_dirblock(dir, block, DIRENT); + if (IS_ERR(bh)) + return PTR_ERR(bh); de = (struct ext4_dir_entry_2 *) bh->b_data; top = (struct ext4_dir_entry_2 *) ((char *) de + @@ -1332,26 +1360,11 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir, const struct q return NULL; do { block = dx_get_block(frame->at); - if (!(bh = ext4_bread(NULL, dir, block, 0, err))) { - if (!(*err)) { - *err = -EIO; - ext4_error(dir->i_sb, - "Directory hole detected on inode %lu\n", - dir->i_ino); - } - goto errout; - } - - if (!buffer_verified(bh) && - !ext4_dirent_csum_verify(dir, - (struct ext4_dir_entry *)bh->b_data)) { - EXT4_ERROR_INODE(dir, "checksumming directory " - "block %lu", (unsigned long)block); - brelse(bh); - *err = -EIO; + bh = ext4_read_dirblock(dir, block, DIRENT); + if (IS_ERR(bh)) { + *err = PTR_ERR(bh); goto errout; } - set_buffer_verified(bh); retval = search_dirblock(bh, dir, d_name, block << EXT4_BLOCK_SIZE_BITS(sb), res_dir); @@ -1535,11 +1548,12 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) csum_size = sizeof(struct ext4_dir_entry_tail); - bh2 = ext4_append (handle, dir, &newblock, &err); - if (!(bh2)) { + bh2 = ext4_append(handle, dir, &newblock); + if (IS_ERR(bh2)) { brelse(*bh); *bh = NULL; - goto errout; + *error = PTR_ERR(bh2); + return NULL; } BUFFER_TRACE(*bh, "get_write_access"); @@ -1620,7 +1634,6 @@ journal_error: brelse(bh2); *bh = NULL; ext4_std_error(dir->i_sb, err); -errout: *error = err; return NULL; } @@ -1698,7 +1711,6 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry, const char *name = dentry->d_name.name; int namelen = dentry->d_name.len; unsigned int blocksize = dir->i_sb->s_blocksize; - unsigned short reclen; int csum_size = 0; int err; @@ -1706,7 +1718,6 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) csum_size = sizeof(struct ext4_dir_entry_tail); - reclen = EXT4_DIR_REC_LEN(namelen); if (!de) { err = ext4_find_dest_de(dir, inode, bh, bh->b_data, blocksize - csum_size, @@ -1797,10 +1808,10 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry, len = ((char *) root) + (blocksize - csum_size) - (char *) de; /* Allocate new block for the 0th block's dirents */ - bh2 = ext4_append(handle, dir, &block, &retval); - if (!(bh2)) { + bh2 = ext4_append(handle, dir, &block); + if (IS_ERR(bh2)) { brelse(bh); - return retval; + return PTR_ERR(bh2); } ext4_set_inode_flag(dir, EXT4_INODE_INDEX); data1 = bh2->b_data; @@ -1917,20 +1928,10 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry, } blocks = dir->i_size >> sb->s_blocksize_bits; for (block = 0; block < blocks; block++) { - if (!(bh = ext4_bread(handle, dir, block, 0, &retval))) { - if (!retval) { - retval = -EIO; - ext4_error(inode->i_sb, - "Directory hole detected on inode %lu\n", - inode->i_ino); - } - return retval; - } - if (!buffer_verified(bh) && - !ext4_dirent_csum_verify(dir, - (struct ext4_dir_entry *)bh->b_data)) - return -EIO; - set_buffer_verified(bh); + bh = ext4_read_dirblock(dir, block, DIRENT); + if (IS_ERR(bh)) + return PTR_ERR(bh); + retval = add_dirent_to_buf(handle, dentry, inode, NULL, bh); if (retval != -ENOSPC) { brelse(bh); @@ -1942,9 +1943,9 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry, return make_indexed_dir(handle, dentry, inode, bh); brelse(bh); } - bh = ext4_append(handle, dir, &block, &retval); - if (!bh) - return retval; + bh = ext4_append(handle, dir, &block); + if (IS_ERR(bh)) + return PTR_ERR(bh); de = (struct ext4_dir_entry_2 *) bh->b_data; de->inode = 0; de->rec_len = ext4_rec_len_to_disk(blocksize - csum_size, blocksize); @@ -1981,22 +1982,13 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry, return err; entries = frame->entries; at = frame->at; - - if (!(bh = ext4_bread(handle, dir, dx_get_block(frame->at), 0, &err))) { - if (!err) { - err = -EIO; - ext4_error(dir->i_sb, - "Directory hole detected on inode %lu\n", - dir->i_ino); - } + bh = ext4_read_dirblock(dir, dx_get_block(frame->at), DIRENT); + if (IS_ERR(bh)) { + err = PTR_ERR(bh); + bh = NULL; goto cleanup; } - if (!buffer_verified(bh) && - !ext4_dirent_csum_verify(dir, (struct ext4_dir_entry *)bh->b_data)) - goto journal_error; - set_buffer_verified(bh); - BUFFER_TRACE(bh, "get_write_access"); err = ext4_journal_get_write_access(handle, bh); if (err) @@ -2024,9 +2016,11 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry, err = -ENOSPC; goto cleanup; } - bh2 = ext4_append (handle, dir, &newblock, &err); - if (!(bh2)) + bh2 = ext4_append(handle, dir, &newblock); + if (IS_ERR(bh2)) { + err = PTR_ERR(bh2); goto cleanup; + } node2 = (struct dx_node *)(bh2->b_data); entries2 = node2->entries; memset(&node2->fake, 0, sizeof(struct fake_dirent)); @@ -2105,8 +2099,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry, journal_error: ext4_std_error(dir->i_sb, err); cleanup: - if (bh) - brelse(bh); + brelse(bh); dx_release(frames); return err; } @@ -2253,29 +2246,28 @@ static int ext4_create(struct inode *dir, struct dentry *dentry, umode_t mode, { handle_t *handle; struct inode *inode; - int err, retries = 0; + int err, credits, retries = 0; dquot_initialize(dir); + credits = (EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + + EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 + + EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb)); retry: - handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + - EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 + - EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb)); - if (IS_ERR(handle)) - return PTR_ERR(handle); - - if (IS_DIRSYNC(dir)) - ext4_handle_sync(handle); - - inode = ext4_new_inode(handle, dir, mode, &dentry->d_name, 0, NULL); + inode = ext4_new_inode_start_handle(dir, mode, &dentry->d_name, 0, + NULL, EXT4_HT_DIR, credits); + handle = ext4_journal_current_handle(); err = PTR_ERR(inode); if (!IS_ERR(inode)) { inode->i_op = &ext4_file_inode_operations; inode->i_fop = &ext4_file_operations; ext4_set_aops(inode); err = ext4_add_nondir(handle, dentry, inode); + if (!err && IS_DIRSYNC(dir)) + ext4_handle_sync(handle); } - ext4_journal_stop(handle); + if (handle) + ext4_journal_stop(handle); if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries)) goto retry; return err; @@ -2286,31 +2278,30 @@ static int ext4_mknod(struct inode *dir, struct dentry *dentry, { handle_t *handle; struct inode *inode; - int err, retries = 0; + int err, credits, retries = 0; if (!new_valid_dev(rdev)) return -EINVAL; dquot_initialize(dir); + credits = (EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + + EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 + + EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb)); retry: - handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + - EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 + - EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb)); - if (IS_ERR(handle)) - return PTR_ERR(handle); - - if (IS_DIRSYNC(dir)) - ext4_handle_sync(handle); - - inode = ext4_new_inode(handle, dir, mode, &dentry->d_name, 0, NULL); + inode = ext4_new_inode_start_handle(dir, mode, &dentry->d_name, 0, + NULL, EXT4_HT_DIR, credits); + handle = ext4_journal_current_handle(); err = PTR_ERR(inode); if (!IS_ERR(inode)) { init_special_inode(inode, inode->i_mode, rdev); inode->i_op = &ext4_special_inode_operations; err = ext4_add_nondir(handle, dentry, inode); + if (!err && IS_DIRSYNC(dir)) + ext4_handle_sync(handle); } - ext4_journal_stop(handle); + if (handle) + ext4_journal_stop(handle); if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries)) goto retry; return err; @@ -2350,6 +2341,7 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir, struct buffer_head *dir_block = NULL; struct ext4_dir_entry_2 *de; struct ext4_dir_entry_tail *t; + ext4_lblk_t block = 0; unsigned int blocksize = dir->i_sb->s_blocksize; int csum_size = 0; int err; @@ -2366,16 +2358,10 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir, goto out; } - inode->i_size = EXT4_I(inode)->i_disksize = blocksize; - if (!(dir_block = ext4_bread(handle, inode, 0, 1, &err))) { - if (!err) { - err = -EIO; - ext4_error(inode->i_sb, - "Directory hole detected on inode %lu\n", - inode->i_ino); - } - goto out; - } + inode->i_size = 0; + dir_block = ext4_append(handle, inode, &block); + if (IS_ERR(dir_block)) + return PTR_ERR(dir_block); BUFFER_TRACE(dir_block, "get_write_access"); err = ext4_journal_get_write_access(handle, dir_block); if (err) @@ -2402,25 +2388,21 @@ static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { handle_t *handle; struct inode *inode; - int err, retries = 0; + int err, credits, retries = 0; if (EXT4_DIR_LINK_MAX(dir)) return -EMLINK; dquot_initialize(dir); + credits = (EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + + EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 + + EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb)); retry: - handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + - EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 + - EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb)); - if (IS_ERR(handle)) - return PTR_ERR(handle); - - if (IS_DIRSYNC(dir)) - ext4_handle_sync(handle); - - inode = ext4_new_inode(handle, dir, S_IFDIR | mode, - &dentry->d_name, 0, NULL); + inode = ext4_new_inode_start_handle(dir, S_IFDIR | mode, + &dentry->d_name, + 0, NULL, EXT4_HT_DIR, credits); + handle = ext4_journal_current_handle(); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_stop; @@ -2448,8 +2430,12 @@ out_clear_inode: goto out_clear_inode; unlock_new_inode(inode); d_instantiate(dentry, inode); + if (IS_DIRSYNC(dir)) + ext4_handle_sync(handle); + out_stop: - ext4_journal_stop(handle); + if (handle) + ext4_journal_stop(handle); if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries)) goto retry; return err; @@ -2475,25 +2461,14 @@ static int empty_dir(struct inode *inode) } sb = inode->i_sb; - if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2) || - !(bh = ext4_bread(NULL, inode, 0, 0, &err))) { - if (err) - EXT4_ERROR_INODE(inode, - "error %d reading directory lblock 0", err); - else - ext4_warning(inode->i_sb, - "bad directory (dir #%lu) - no data block", - inode->i_ino); + if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2)) { + EXT4_ERROR_INODE(inode, "invalid size"); return 1; } - if (!buffer_verified(bh) && - !ext4_dirent_csum_verify(inode, - (struct ext4_dir_entry *)bh->b_data)) { - EXT4_ERROR_INODE(inode, "checksum error reading directory " - "lblock 0"); - return -EIO; - } - set_buffer_verified(bh); + bh = ext4_read_dirblock(inode, 0, EITHER); + if (IS_ERR(bh)) + return 1; + de = (struct ext4_dir_entry_2 *) bh->b_data; de1 = ext4_next_entry(de, sb->s_blocksize); if (le32_to_cpu(de->inode) != inode->i_ino || @@ -2516,28 +2491,9 @@ static int empty_dir(struct inode *inode) err = 0; brelse(bh); lblock = offset >> EXT4_BLOCK_SIZE_BITS(sb); - bh = ext4_bread(NULL, inode, lblock, 0, &err); - if (!bh) { - if (err) - EXT4_ERROR_INODE(inode, - "error %d reading directory " - "lblock %u", err, lblock); - else - ext4_warning(inode->i_sb, - "bad directory (dir #%lu) - no data block", - inode->i_ino); - - offset += sb->s_blocksize; - continue; - } - if (!buffer_verified(bh) && - !ext4_dirent_csum_verify(inode, - (struct ext4_dir_entry *)bh->b_data)) { - EXT4_ERROR_INODE(inode, "checksum error " - "reading directory lblock 0"); - return -EIO; - } - set_buffer_verified(bh); + bh = ext4_read_dirblock(inode, lblock, EITHER); + if (IS_ERR(bh)) + return 1; de = (struct ext4_dir_entry_2 *) bh->b_data; } if (ext4_check_dir_entry(inode, NULL, de, bh, @@ -2716,25 +2672,18 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry) struct inode *inode; struct buffer_head *bh; struct ext4_dir_entry_2 *de; - handle_t *handle; + handle_t *handle = NULL; /* Initialize quotas before so that eventual writes go in * separate transaction */ dquot_initialize(dir); dquot_initialize(dentry->d_inode); - handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb)); - if (IS_ERR(handle)) - return PTR_ERR(handle); - retval = -ENOENT; bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL); if (!bh) goto end_rmdir; - if (IS_DIRSYNC(dir)) - ext4_handle_sync(handle); - inode = dentry->d_inode; retval = -EIO; @@ -2745,6 +2694,17 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry) if (!empty_dir(inode)) goto end_rmdir; + handle = ext4_journal_start(dir, EXT4_HT_DIR, + EXT4_DATA_TRANS_BLOCKS(dir->i_sb)); + if (IS_ERR(handle)) { + retval = PTR_ERR(handle); + handle = NULL; + goto end_rmdir; + } + + if (IS_DIRSYNC(dir)) + ext4_handle_sync(handle); + retval = ext4_delete_entry(handle, dir, de, bh); if (retval) goto end_rmdir; @@ -2766,8 +2726,9 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry) ext4_mark_inode_dirty(handle, dir); end_rmdir: - ext4_journal_stop(handle); brelse(bh); + if (handle) + ext4_journal_stop(handle); return retval; } @@ -2777,7 +2738,7 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry) struct inode *inode; struct buffer_head *bh; struct ext4_dir_entry_2 *de; - handle_t *handle; + handle_t *handle = NULL; trace_ext4_unlink_enter(dir, dentry); /* Initialize quotas before so that eventual writes go @@ -2785,13 +2746,6 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry) dquot_initialize(dir); dquot_initialize(dentry->d_inode); - handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb)); - if (IS_ERR(handle)) - return PTR_ERR(handle); - - if (IS_DIRSYNC(dir)) - ext4_handle_sync(handle); - retval = -ENOENT; bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL); if (!bh) @@ -2803,6 +2757,17 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry) if (le32_to_cpu(de->inode) != inode->i_ino) goto end_unlink; + handle = ext4_journal_start(dir, EXT4_HT_DIR, + EXT4_DATA_TRANS_BLOCKS(dir->i_sb)); + if (IS_ERR(handle)) { + retval = PTR_ERR(handle); + handle = NULL; + goto end_unlink; + } + + if (IS_DIRSYNC(dir)) + ext4_handle_sync(handle); + if (!inode->i_nlink) { ext4_warning(inode->i_sb, "Deleting nonexistent file (%lu), %d", @@ -2823,8 +2788,9 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry) retval = 0; end_unlink: - ext4_journal_stop(handle); brelse(bh); + if (handle) + ext4_journal_stop(handle); trace_ext4_unlink_exit(dentry, retval); return retval; } @@ -2864,15 +2830,10 @@ static int ext4_symlink(struct inode *dir, EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb); } retry: - handle = ext4_journal_start(dir, credits); - if (IS_ERR(handle)) - return PTR_ERR(handle); - - if (IS_DIRSYNC(dir)) - ext4_handle_sync(handle); - - inode = ext4_new_inode(handle, dir, S_IFLNK|S_IRWXUGO, - &dentry->d_name, 0, NULL); + inode = ext4_new_inode_start_handle(dir, S_IFLNK|S_IRWXUGO, + &dentry->d_name, 0, NULL, + EXT4_HT_DIR, credits); + handle = ext4_journal_current_handle(); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_stop; @@ -2902,7 +2863,7 @@ retry: * Now inode is being linked into dir (EXT4_DATA_TRANS_BLOCKS * + EXT4_INDEX_EXTRA_TRANS_BLOCKS), inode is also modified */ - handle = ext4_journal_start(dir, + handle = ext4_journal_start(dir, EXT4_HT_DIR, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + EXT4_INDEX_EXTRA_TRANS_BLOCKS + 1); if (IS_ERR(handle)) { @@ -2925,8 +2886,12 @@ retry: } EXT4_I(inode)->i_disksize = inode->i_size; err = ext4_add_nondir(handle, dentry, inode); + if (!err && IS_DIRSYNC(dir)) + ext4_handle_sync(handle); + out_stop: - ext4_journal_stop(handle); + if (handle) + ext4_journal_stop(handle); if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries)) goto retry; return err; @@ -2949,8 +2914,9 @@ static int ext4_link(struct dentry *old_dentry, dquot_initialize(dir); retry: - handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + - EXT4_INDEX_EXTRA_TRANS_BLOCKS); + handle = ext4_journal_start(dir, EXT4_HT_DIR, + (EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + + EXT4_INDEX_EXTRA_TRANS_BLOCKS)); if (IS_ERR(handle)) return PTR_ERR(handle); @@ -2990,13 +2956,9 @@ static struct buffer_head *ext4_get_first_dir_block(handle_t *handle, struct buffer_head *bh; if (!ext4_has_inline_data(inode)) { - if (!(bh = ext4_bread(handle, inode, 0, 0, retval))) { - if (!*retval) { - *retval = -EIO; - ext4_error(inode->i_sb, - "Directory hole detected on inode %lu\n", - inode->i_ino); - } + bh = ext4_read_dirblock(inode, 0, EITHER); + if (IS_ERR(bh)) { + *retval = PTR_ERR(bh); return NULL; } *parent_de = ext4_next_entry( @@ -3033,9 +2995,9 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, * in separate transaction */ if (new_dentry->d_inode) dquot_initialize(new_dentry->d_inode); - handle = ext4_journal_start(old_dir, 2 * - EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) + - EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2); + handle = ext4_journal_start(old_dir, EXT4_HT_DIR, + (2 * EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) + + EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2)); if (IS_ERR(handle)) return PTR_ERR(handle); @@ -3075,11 +3037,6 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, &inlined); if (!dir_bh) goto end_rename; - if (!inlined && !buffer_verified(dir_bh) && - !ext4_dirent_csum_verify(old_inode, - (struct ext4_dir_entry *)dir_bh->b_data)) - goto end_rename; - set_buffer_verified(dir_bh); if (le32_to_cpu(parent_de->inode) != old_dir->i_ino) goto end_rename; retval = -EMLINK; diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 0016fbc..809b310 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -23,6 +23,7 @@ #include <linux/workqueue.h> #include <linux/kernel.h> #include <linux/slab.h> +#include <linux/mm.h> #include "ext4_jbd2.h" #include "xattr.h" @@ -73,8 +74,6 @@ void ext4_free_io_end(ext4_io_end_t *io) BUG_ON(!list_empty(&io->list)); BUG_ON(io->flag & EXT4_IO_END_UNWRITTEN); - if (io->page) - put_page(io->page); for (i = 0; i < io->num_io_pages; i++) put_io_page(io->pages[i]); io->num_io_pages = 0; @@ -103,14 +102,13 @@ static int ext4_end_io(ext4_io_end_t *io) "(inode %lu, offset %llu, size %zd, error %d)", inode->i_ino, offset, size, ret); } - if (io->iocb) - aio_complete(io->iocb, io->result, 0); - - if (io->flag & EXT4_IO_END_DIRECT) - inode_dio_done(inode); /* Wake up anyone waiting on unwritten extent conversion */ if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten)) wake_up_all(ext4_ioend_wq(inode)); + if (io->flag & EXT4_IO_END_DIRECT) + inode_dio_done(inode); + if (io->iocb) + aio_complete(io->iocb, io->result, 0); return ret; } @@ -119,7 +117,6 @@ static void dump_completed_IO(struct inode *inode) #ifdef EXT4FS_DEBUG struct list_head *cur, *before, *after; ext4_io_end_t *io, *io0, *io1; - unsigned long flags; if (list_empty(&EXT4_I(inode)->i_completed_io_list)) { ext4_debug("inode %lu completed_io list is empty\n", @@ -152,26 +149,20 @@ void ext4_add_complete_io(ext4_io_end_t *io_end) wq = EXT4_SB(io_end->inode->i_sb)->dio_unwritten_wq; spin_lock_irqsave(&ei->i_completed_io_lock, flags); - if (list_empty(&ei->i_completed_io_list)) { - io_end->flag |= EXT4_IO_END_QUEUED; - queue_work(wq, &io_end->work); - } + if (list_empty(&ei->i_completed_io_list)) + queue_work(wq, &ei->i_unwritten_work); list_add_tail(&io_end->list, &ei->i_completed_io_list); spin_unlock_irqrestore(&ei->i_completed_io_lock, flags); } -static int ext4_do_flush_completed_IO(struct inode *inode, - ext4_io_end_t *work_io) +static int ext4_do_flush_completed_IO(struct inode *inode) { ext4_io_end_t *io; - struct list_head unwritten, complete, to_free; + struct list_head unwritten; unsigned long flags; struct ext4_inode_info *ei = EXT4_I(inode); int err, ret = 0; - INIT_LIST_HEAD(&complete); - INIT_LIST_HEAD(&to_free); - spin_lock_irqsave(&ei->i_completed_io_lock, flags); dump_completed_IO(inode); list_replace_init(&ei->i_completed_io_list, &unwritten); @@ -185,32 +176,7 @@ static int ext4_do_flush_completed_IO(struct inode *inode, err = ext4_end_io(io); if (unlikely(!ret && err)) ret = err; - - list_add_tail(&io->list, &complete); - } - spin_lock_irqsave(&ei->i_completed_io_lock, flags); - while (!list_empty(&complete)) { - io = list_entry(complete.next, ext4_io_end_t, list); io->flag &= ~EXT4_IO_END_UNWRITTEN; - /* end_io context can not be destroyed now because it still - * used by queued worker. Worker thread will destroy it later */ - if (io->flag & EXT4_IO_END_QUEUED) - list_del_init(&io->list); - else - list_move(&io->list, &to_free); - } - /* If we are called from worker context, it is time to clear queued - * flag, and destroy it's end_io if it was converted already */ - if (work_io) { - work_io->flag &= ~EXT4_IO_END_QUEUED; - if (!(work_io->flag & EXT4_IO_END_UNWRITTEN)) - list_add_tail(&work_io->list, &to_free); - } - spin_unlock_irqrestore(&ei->i_completed_io_lock, flags); - - while (!list_empty(&to_free)) { - io = list_entry(to_free.next, ext4_io_end_t, list); - list_del_init(&io->list); ext4_free_io_end(io); } return ret; @@ -219,10 +185,11 @@ static int ext4_do_flush_completed_IO(struct inode *inode, /* * work on completed aio dio IO, to convert unwritten extents to extents */ -static void ext4_end_io_work(struct work_struct *work) +void ext4_end_io_work(struct work_struct *work) { - ext4_io_end_t *io = container_of(work, ext4_io_end_t, work); - ext4_do_flush_completed_IO(io->inode, io); + struct ext4_inode_info *ei = container_of(work, struct ext4_inode_info, + i_unwritten_work); + ext4_do_flush_completed_IO(&ei->vfs_inode); } int ext4_flush_unwritten_io(struct inode *inode) @@ -230,7 +197,7 @@ int ext4_flush_unwritten_io(struct inode *inode) int ret; WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex) && !(inode->i_state & I_FREEING)); - ret = ext4_do_flush_completed_IO(inode, NULL); + ret = ext4_do_flush_completed_IO(inode); ext4_unwritten_wait(inode); return ret; } @@ -241,7 +208,6 @@ ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags) if (io) { atomic_inc(&EXT4_I(inode)->i_ioend_count); io->inode = inode; - INIT_WORK(&io->work, ext4_end_io_work); INIT_LIST_HEAD(&io->list); } return io; @@ -382,14 +348,6 @@ static int io_submit_add_bh(struct ext4_io_submit *io, unmap_underlying_metadata(bh->b_bdev, bh->b_blocknr); } - if (!buffer_mapped(bh) || buffer_delay(bh)) { - if (!buffer_mapped(bh)) - clear_buffer_dirty(bh); - if (io->io_bio) - ext4_io_submit(io); - return 0; - } - if (io->io_bio && bh->b_blocknr != io->io_next_block) { submit_and_retry: ext4_io_submit(io); @@ -436,7 +394,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io, io_page = kmem_cache_alloc(io_page_cachep, GFP_NOFS); if (!io_page) { - set_page_dirty(page); + redirty_page_for_writepage(wbc, page); unlock_page(page); return -ENOMEM; } @@ -468,7 +426,15 @@ int ext4_bio_write_page(struct ext4_io_submit *io, set_buffer_uptodate(bh); continue; } - clear_buffer_dirty(bh); + if (!buffer_dirty(bh) || buffer_delay(bh) || + !buffer_mapped(bh) || buffer_unwritten(bh)) { + /* A hole? We can safely clear the dirty bit */ + if (!buffer_mapped(bh)) + clear_buffer_dirty(bh); + if (io->io_bio) + ext4_io_submit(io); + continue; + } ret = io_submit_add_bh(io, io_page, inode, wbc, bh); if (ret) { /* @@ -476,9 +442,10 @@ int ext4_bio_write_page(struct ext4_io_submit *io, * we can do but mark the page as dirty, and * better luck next time. */ - set_page_dirty(page); + redirty_page_for_writepage(wbc, page); break; } + clear_buffer_dirty(bh); } unlock_page(page); /* diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index d99387b..c7f4d75 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -333,8 +333,8 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb, int err; bh = sb_getblk(sb, blk); - if (!bh) - return ERR_PTR(-EIO); + if (unlikely(!bh)) + return ERR_PTR(-ENOMEM); if ((err = ext4_journal_get_write_access(handle, bh))) { brelse(bh); bh = ERR_PTR(err); @@ -410,8 +410,8 @@ static int set_flexbg_block_bitmap(struct super_block *sb, handle_t *handle, return err; bh = sb_getblk(sb, flex_gd->groups[group].block_bitmap); - if (!bh) - return -EIO; + if (unlikely(!bh)) + return -ENOMEM; err = ext4_journal_get_write_access(handle, bh); if (err) @@ -466,7 +466,7 @@ static int setup_new_flex_group_blocks(struct super_block *sb, meta_bg = EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG); /* This transaction may be extended/restarted along the way */ - handle = ext4_journal_start_sb(sb, EXT4_MAX_TRANS_DATA); + handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, EXT4_MAX_TRANS_DATA); if (IS_ERR(handle)) return PTR_ERR(handle); @@ -500,8 +500,8 @@ static int setup_new_flex_group_blocks(struct super_block *sb, goto out; gdb = sb_getblk(sb, block); - if (!gdb) { - err = -EIO; + if (unlikely(!gdb)) { + err = -ENOMEM; goto out; } @@ -1031,7 +1031,7 @@ static void update_backups(struct super_block *sb, int blk_off, char *data, handle_t *handle; int err = 0, err2; - handle = ext4_journal_start_sb(sb, EXT4_MAX_TRANS_DATA); + handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, EXT4_MAX_TRANS_DATA); if (IS_ERR(handle)) { group = 1; err = PTR_ERR(handle); @@ -1064,8 +1064,8 @@ static void update_backups(struct super_block *sb, int blk_off, char *data, ext4_bg_has_super(sb, group)); bh = sb_getblk(sb, backup_block); - if (!bh) { - err = -EIO; + if (unlikely(!bh)) { + err = -ENOMEM; break; } ext4_debug("update metadata backup %llu(+%llu)\n", @@ -1168,7 +1168,7 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb, static struct buffer_head *ext4_get_bitmap(struct super_block *sb, __u64 block) { struct buffer_head *bh = sb_getblk(sb, block); - if (!bh) + if (unlikely(!bh)) return NULL; if (!bh_uptodate_or_lock(bh)) { if (bh_submit_read(bh) < 0) { @@ -1412,7 +1412,7 @@ static int ext4_flex_group_add(struct super_block *sb, * modify each of the reserved GDT dindirect blocks. */ credit = flex_gd->count * 4 + reserved_gdb; - handle = ext4_journal_start_sb(sb, credit); + handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, credit); if (IS_ERR(handle)) { err = PTR_ERR(handle); goto exit; @@ -1506,10 +1506,12 @@ static int ext4_setup_next_flex_gd(struct super_block *sb, group_data[i].blocks_count = blocks_per_group; overhead = ext4_group_overhead_blocks(sb, group + i); group_data[i].free_blocks_count = blocks_per_group - overhead; - if (ext4_has_group_desc_csum(sb)) + if (ext4_has_group_desc_csum(sb)) { flex_gd->bg_flags[i] = EXT4_BG_BLOCK_UNINIT | EXT4_BG_INODE_UNINIT; - else + if (!test_opt(sb, INIT_INODE_TABLE)) + flex_gd->bg_flags[i] |= EXT4_BG_INODE_ZEROED; + } else flex_gd->bg_flags[i] = EXT4_BG_INODE_ZEROED; } @@ -1594,7 +1596,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input) err = ext4_alloc_flex_bg_array(sb, input->group + 1); if (err) - return err; + goto out; err = ext4_mb_alloc_groupinfo(sb, input->group + 1); if (err) @@ -1622,7 +1624,7 @@ static int ext4_group_extend_no_check(struct super_block *sb, /* We will update the superblock, one block bitmap, and * one group descriptor via ext4_group_add_blocks(). */ - handle = ext4_journal_start_sb(sb, 3); + handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, 3); if (IS_ERR(handle)) { err = PTR_ERR(handle); ext4_warning(sb, "error %d on journal start", err); @@ -1786,7 +1788,7 @@ static int ext4_convert_meta_bg(struct super_block *sb, struct inode *inode) credits += 3; /* block bitmap, bg descriptor, resize inode */ } - handle = ext4_journal_start_sb(sb, credits); + handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, credits); if (IS_ERR(handle)) return PTR_ERR(handle); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 3d4fb81..373d46c 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -69,8 +69,6 @@ static void ext4_mark_recovery_complete(struct super_block *sb, static void ext4_clear_journal_err(struct super_block *sb, struct ext4_super_block *es); static int ext4_sync_fs(struct super_block *sb, int wait); -static const char *ext4_decode_error(struct super_block *sb, int errno, - char nbuf[16]); static int ext4_remount(struct super_block *sb, int *flags, char *data); static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); static int ext4_unfreeze(struct super_block *sb); @@ -296,107 +294,6 @@ void ext4_itable_unused_set(struct super_block *sb, } -/* Just increment the non-pointer handle value */ -static handle_t *ext4_get_nojournal(void) -{ - handle_t *handle = current->journal_info; - unsigned long ref_cnt = (unsigned long)handle; - - BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); - - ref_cnt++; - handle = (handle_t *)ref_cnt; - - current->journal_info = handle; - return handle; -} - - -/* Decrement the non-pointer handle value */ -static void ext4_put_nojournal(handle_t *handle) -{ - unsigned long ref_cnt = (unsigned long)handle; - - BUG_ON(ref_cnt == 0); - - ref_cnt--; - handle = (handle_t *)ref_cnt; - - current->journal_info = handle; -} - -/* - * Wrappers for jbd2_journal_start/end. - */ -handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) -{ - journal_t *journal; - - trace_ext4_journal_start(sb, nblocks, _RET_IP_); - if (sb->s_flags & MS_RDONLY) - return ERR_PTR(-EROFS); - - WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE); - journal = EXT4_SB(sb)->s_journal; - if (!journal) - return ext4_get_nojournal(); - /* - * Special case here: if the journal has aborted behind our - * backs (eg. EIO in the commit thread), then we still need to - * take the FS itself readonly cleanly. - */ - if (is_journal_aborted(journal)) { - ext4_abort(sb, "Detected aborted journal"); - return ERR_PTR(-EROFS); - } - return jbd2_journal_start(journal, nblocks); -} - -int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) -{ - struct super_block *sb; - int err; - int rc; - - if (!ext4_handle_valid(handle)) { - ext4_put_nojournal(handle); - return 0; - } - sb = handle->h_transaction->t_journal->j_private; - err = handle->h_err; - rc = jbd2_journal_stop(handle); - - if (!err) - err = rc; - if (err) - __ext4_std_error(sb, where, line, err); - return err; -} - -void ext4_journal_abort_handle(const char *caller, unsigned int line, - const char *err_fn, struct buffer_head *bh, - handle_t *handle, int err) -{ - char nbuf[16]; - const char *errstr = ext4_decode_error(NULL, err, nbuf); - - BUG_ON(!ext4_handle_valid(handle)); - - if (bh) - BUFFER_TRACE(bh, "abort"); - - if (!handle->h_err) - handle->h_err = err; - - if (is_handle_aborted(handle)) - return; - - printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n", - caller, line, errstr, err_fn); - - jbd2_journal_abort_handle(handle); -} - static void __save_error_info(struct super_block *sb, const char *func, unsigned int line) { @@ -582,8 +479,8 @@ void ext4_error_file(struct file *file, const char *function, ext4_handle_error(inode->i_sb); } -static const char *ext4_decode_error(struct super_block *sb, int errno, - char nbuf[16]) +const char *ext4_decode_error(struct super_block *sb, int errno, + char nbuf[16]) { char *errstr = NULL; @@ -858,6 +755,7 @@ static void ext4_put_super(struct super_block *sb) ext4_abort(sb, "Couldn't clean up the journal"); } + ext4_es_unregister_shrinker(sb); del_timer(&sbi->s_err_report); ext4_release_system_zone(sb); ext4_mb_release(sb); @@ -939,11 +837,12 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) return NULL; ei->vfs_inode.i_version = 1; - memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); INIT_LIST_HEAD(&ei->i_prealloc_list); spin_lock_init(&ei->i_prealloc_lock); ext4_es_init_tree(&ei->i_es_tree); rwlock_init(&ei->i_es_lock); + INIT_LIST_HEAD(&ei->i_es_lru); + ei->i_es_lru_nr = 0; ei->i_reserved_data_blocks = 0; ei->i_reserved_meta_blocks = 0; ei->i_allocated_meta_blocks = 0; @@ -960,6 +859,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) ei->i_datasync_tid = 0; atomic_set(&ei->i_ioend_count, 0); atomic_set(&ei->i_unwritten, 0); + INIT_WORK(&ei->i_unwritten_work, ext4_end_io_work); return &ei->vfs_inode; } @@ -1031,6 +931,7 @@ void ext4_clear_inode(struct inode *inode) dquot_drop(inode); ext4_discard_preallocations(inode); ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); + ext4_es_lru_del(inode); if (EXT4_I(inode)->jinode) { jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), EXT4_I(inode)->jinode); @@ -1280,8 +1181,8 @@ static const match_table_t tokens = { {Opt_stripe, "stripe=%u"}, {Opt_delalloc, "delalloc"}, {Opt_nodelalloc, "nodelalloc"}, - {Opt_mblk_io_submit, "mblk_io_submit"}, - {Opt_nomblk_io_submit, "nomblk_io_submit"}, + {Opt_removed, "mblk_io_submit"}, + {Opt_removed, "nomblk_io_submit"}, {Opt_block_validity, "block_validity"}, {Opt_noblock_validity, "noblock_validity"}, {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, @@ -1337,6 +1238,7 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) { struct ext4_sb_info *sbi = EXT4_SB(sb); char *qname; + int ret = -1; if (sb_any_quota_loaded(sb) && !sbi->s_qf_names[qtype]) { @@ -1351,23 +1253,26 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) "Not enough memory for storing quotafile name"); return -1; } - if (sbi->s_qf_names[qtype] && - strcmp(sbi->s_qf_names[qtype], qname)) { - ext4_msg(sb, KERN_ERR, - "%s quota file already specified", QTYPE2NAME(qtype)); - kfree(qname); - return -1; + if (sbi->s_qf_names[qtype]) { + if (strcmp(sbi->s_qf_names[qtype], qname) == 0) + ret = 1; + else + ext4_msg(sb, KERN_ERR, + "%s quota file already specified", + QTYPE2NAME(qtype)); + goto errout; } - sbi->s_qf_names[qtype] = qname; - if (strchr(sbi->s_qf_names[qtype], '/')) { + if (strchr(qname, '/')) { ext4_msg(sb, KERN_ERR, "quotafile must be on filesystem root"); - kfree(sbi->s_qf_names[qtype]); - sbi->s_qf_names[qtype] = NULL; - return -1; + goto errout; } + sbi->s_qf_names[qtype] = qname; set_opt(sb, QUOTA); return 1; +errout: + kfree(qname); + return ret; } static int clear_qf_name(struct super_block *sb, int qtype) @@ -1381,10 +1286,7 @@ static int clear_qf_name(struct super_block *sb, int qtype) " when quota turned on"); return -1; } - /* - * The space will be released later when all options are confirmed - * to be correct - */ + kfree(sbi->s_qf_names[qtype]); sbi->s_qf_names[qtype] = NULL; return 1; } @@ -1404,6 +1306,9 @@ static int clear_qf_name(struct super_block *sb, int qtype) #define MOPT_QFMT MOPT_NOSUPPORT #endif #define MOPT_DATAJ 0x0080 +#define MOPT_NO_EXT2 0x0100 +#define MOPT_NO_EXT3 0x0200 +#define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) static const struct mount_opts { int token; @@ -1414,25 +1319,31 @@ static const struct mount_opts { {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, - {Opt_mblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_SET}, - {Opt_nomblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_CLEAR}, {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, - {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, - {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, + {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, + MOPT_EXT4_ONLY | MOPT_SET}, + {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, + MOPT_EXT4_ONLY | MOPT_CLEAR}, {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, - {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, - {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, - {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, + {Opt_delalloc, EXT4_MOUNT_DELALLOC, + MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, + {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, + MOPT_EXT4_ONLY | MOPT_CLEAR | MOPT_EXPLICIT}, + {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, + MOPT_EXT4_ONLY | MOPT_SET}, {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | - EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, - {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, + EXT4_MOUNT_JOURNAL_CHECKSUM), + MOPT_EXT4_ONLY | MOPT_SET}, + {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, - {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, - {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, + {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, + MOPT_NO_EXT2 | MOPT_SET}, + {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, + MOPT_NO_EXT2 | MOPT_CLEAR}, {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, @@ -1444,9 +1355,14 @@ static const struct mount_opts { {Opt_inode_readahead_blks, 0, MOPT_GTE0}, {Opt_init_itable, 0, MOPT_GTE0}, {Opt_stripe, 0, MOPT_GTE0}, - {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, - {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, - {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, + {Opt_resuid, 0, MOPT_GTE0}, + {Opt_resgid, 0, MOPT_GTE0}, + {Opt_journal_dev, 0, MOPT_GTE0}, + {Opt_journal_ioprio, 0, MOPT_GTE0}, + {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, + {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, + {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, + MOPT_NO_EXT2 | MOPT_DATAJ}, {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, #ifdef CONFIG_EXT4_FS_POSIX_ACL @@ -1496,8 +1412,6 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, else if (token == Opt_offgrpjquota) return clear_qf_name(sb, GRPQUOTA); #endif - if (args->from && match_int(args, &arg)) - return -1; switch (token) { case Opt_noacl: case Opt_nouser_xattr: @@ -1506,138 +1420,149 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, case Opt_sb: return 1; /* handled by get_sb_block() */ case Opt_removed: - ext4_msg(sb, KERN_WARNING, - "Ignoring removed %s option", opt); + ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); + return 1; + case Opt_abort: + sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; + return 1; + case Opt_i_version: + sb->s_flags |= MS_I_VERSION; return 1; - case Opt_resuid: + } + + for (m = ext4_mount_opts; m->token != Opt_err; m++) + if (token == m->token) + break; + + if (m->token == Opt_err) { + ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " + "or missing value", opt); + return -1; + } + + if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { + ext4_msg(sb, KERN_ERR, + "Mount option \"%s\" incompatible with ext2", opt); + return -1; + } + if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { + ext4_msg(sb, KERN_ERR, + "Mount option \"%s\" incompatible with ext3", opt); + return -1; + } + + if (args->from && match_int(args, &arg)) + return -1; + if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) + return -1; + if (m->flags & MOPT_EXPLICIT) + set_opt2(sb, EXPLICIT_DELALLOC); + if (m->flags & MOPT_CLEAR_ERR) + clear_opt(sb, ERRORS_MASK); + if (token == Opt_noquota && sb_any_quota_loaded(sb)) { + ext4_msg(sb, KERN_ERR, "Cannot change quota " + "options when quota turned on"); + return -1; + } + + if (m->flags & MOPT_NOSUPPORT) { + ext4_msg(sb, KERN_ERR, "%s option not supported", opt); + } else if (token == Opt_commit) { + if (arg == 0) + arg = JBD2_DEFAULT_MAX_COMMIT_AGE; + sbi->s_commit_interval = HZ * arg; + } else if (token == Opt_max_batch_time) { + if (arg == 0) + arg = EXT4_DEF_MAX_BATCH_TIME; + sbi->s_max_batch_time = arg; + } else if (token == Opt_min_batch_time) { + sbi->s_min_batch_time = arg; + } else if (token == Opt_inode_readahead_blks) { + if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { + ext4_msg(sb, KERN_ERR, + "EXT4-fs: inode_readahead_blks must be " + "0 or a power of 2 smaller than 2^31"); + return -1; + } + sbi->s_inode_readahead_blks = arg; + } else if (token == Opt_init_itable) { + set_opt(sb, INIT_INODE_TABLE); + if (!args->from) + arg = EXT4_DEF_LI_WAIT_MULT; + sbi->s_li_wait_mult = arg; + } else if (token == Opt_max_dir_size_kb) { + sbi->s_max_dir_size_kb = arg; + } else if (token == Opt_stripe) { + sbi->s_stripe = arg; + } else if (token == Opt_resuid) { uid = make_kuid(current_user_ns(), arg); if (!uid_valid(uid)) { ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); return -1; } sbi->s_resuid = uid; - return 1; - case Opt_resgid: + } else if (token == Opt_resgid) { gid = make_kgid(current_user_ns(), arg); if (!gid_valid(gid)) { ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); return -1; } sbi->s_resgid = gid; - return 1; - case Opt_abort: - sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; - return 1; - case Opt_i_version: - sb->s_flags |= MS_I_VERSION; - return 1; - case Opt_journal_dev: + } else if (token == Opt_journal_dev) { if (is_remount) { ext4_msg(sb, KERN_ERR, "Cannot specify journal on remount"); return -1; } *journal_devnum = arg; - return 1; - case Opt_journal_ioprio: - if (arg < 0 || arg > 7) - return -1; - *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); - return 1; - } - - for (m = ext4_mount_opts; m->token != Opt_err; m++) { - if (token != m->token) - continue; - if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) - return -1; - if (m->flags & MOPT_EXPLICIT) - set_opt2(sb, EXPLICIT_DELALLOC); - if (m->flags & MOPT_CLEAR_ERR) - clear_opt(sb, ERRORS_MASK); - if (token == Opt_noquota && sb_any_quota_loaded(sb)) { - ext4_msg(sb, KERN_ERR, "Cannot change quota " - "options when quota turned on"); + } else if (token == Opt_journal_ioprio) { + if (arg > 7) { + ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" + " (must be 0-7)"); return -1; } - - if (m->flags & MOPT_NOSUPPORT) { - ext4_msg(sb, KERN_ERR, "%s option not supported", opt); - } else if (token == Opt_commit) { - if (arg == 0) - arg = JBD2_DEFAULT_MAX_COMMIT_AGE; - sbi->s_commit_interval = HZ * arg; - } else if (token == Opt_max_batch_time) { - if (arg == 0) - arg = EXT4_DEF_MAX_BATCH_TIME; - sbi->s_max_batch_time = arg; - } else if (token == Opt_min_batch_time) { - sbi->s_min_batch_time = arg; - } else if (token == Opt_inode_readahead_blks) { - if (arg > (1 << 30)) - return -1; - if (arg && !is_power_of_2(arg)) { + *journal_ioprio = + IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); + } else if (m->flags & MOPT_DATAJ) { + if (is_remount) { + if (!sbi->s_journal) + ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); + else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { ext4_msg(sb, KERN_ERR, - "EXT4-fs: inode_readahead_blks" - " must be a power of 2"); - return -1; - } - sbi->s_inode_readahead_blks = arg; - } else if (token == Opt_init_itable) { - set_opt(sb, INIT_INODE_TABLE); - if (!args->from) - arg = EXT4_DEF_LI_WAIT_MULT; - sbi->s_li_wait_mult = arg; - } else if (token == Opt_max_dir_size_kb) { - sbi->s_max_dir_size_kb = arg; - } else if (token == Opt_stripe) { - sbi->s_stripe = arg; - } else if (m->flags & MOPT_DATAJ) { - if (is_remount) { - if (!sbi->s_journal) - ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); - else if (test_opt(sb, DATA_FLAGS) != - m->mount_opt) { - ext4_msg(sb, KERN_ERR, "Cannot change data mode on remount"); - return -1; - } - } else { - clear_opt(sb, DATA_FLAGS); - sbi->s_mount_opt |= m->mount_opt; - } -#ifdef CONFIG_QUOTA - } else if (m->flags & MOPT_QFMT) { - if (sb_any_quota_loaded(sb) && - sbi->s_jquota_fmt != m->mount_opt) { - ext4_msg(sb, KERN_ERR, "Cannot " - "change journaled quota options " - "when quota turned on"); return -1; } - sbi->s_jquota_fmt = m->mount_opt; -#endif } else { - if (!args->from) - arg = 1; - if (m->flags & MOPT_CLEAR) - arg = !arg; - else if (unlikely(!(m->flags & MOPT_SET))) { - ext4_msg(sb, KERN_WARNING, - "buggy handling of option %s", opt); - WARN_ON(1); - return -1; - } - if (arg != 0) - sbi->s_mount_opt |= m->mount_opt; - else - sbi->s_mount_opt &= ~m->mount_opt; + clear_opt(sb, DATA_FLAGS); + sbi->s_mount_opt |= m->mount_opt; } - return 1; +#ifdef CONFIG_QUOTA + } else if (m->flags & MOPT_QFMT) { + if (sb_any_quota_loaded(sb) && + sbi->s_jquota_fmt != m->mount_opt) { + ext4_msg(sb, KERN_ERR, "Cannot change journaled " + "quota options when quota turned on"); + return -1; + } + sbi->s_jquota_fmt = m->mount_opt; +#endif + } else { + if (!args->from) + arg = 1; + if (m->flags & MOPT_CLEAR) + arg = !arg; + else if (unlikely(!(m->flags & MOPT_SET))) { + ext4_msg(sb, KERN_WARNING, + "buggy handling of option %s", opt); + WARN_ON(1); + return -1; + } + if (arg != 0) + sbi->s_mount_opt |= m->mount_opt; + else + sbi->s_mount_opt &= ~m->mount_opt; } - ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " - "or missing value", opt); - return -1; + return 1; } static int parse_options(char *options, struct super_block *sb, @@ -2776,7 +2701,7 @@ static int ext4_run_li_request(struct ext4_li_request *elr) break; } - if (group == ngroups) + if (group >= ngroups) ret = 1; if (!ret) { @@ -3016,33 +2941,34 @@ static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, return elr; } -static int ext4_register_li_request(struct super_block *sb, - ext4_group_t first_not_zeroed) +int ext4_register_li_request(struct super_block *sb, + ext4_group_t first_not_zeroed) { struct ext4_sb_info *sbi = EXT4_SB(sb); - struct ext4_li_request *elr; + struct ext4_li_request *elr = NULL; ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; int ret = 0; + mutex_lock(&ext4_li_mtx); if (sbi->s_li_request != NULL) { /* * Reset timeout so it can be computed again, because * s_li_wait_mult might have changed. */ sbi->s_li_request->lr_timeout = 0; - return 0; + goto out; } if (first_not_zeroed == ngroups || (sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) - return 0; + goto out; elr = ext4_li_request_new(sb, first_not_zeroed); - if (!elr) - return -ENOMEM; - - mutex_lock(&ext4_li_mtx); + if (!elr) { + ret = -ENOMEM; + goto out; + } if (NULL == ext4_li_info) { ret = ext4_li_info_new(); @@ -3379,7 +3305,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) #ifdef CONFIG_EXT4_FS_POSIX_ACL set_opt(sb, POSIX_ACL); #endif - set_opt(sb, MBLK_IO_SUBMIT); if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) set_opt(sb, JOURNAL_DATA); else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) @@ -3772,6 +3697,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_max_writeback_mb_bump = 128; sbi->s_extent_max_zeroout_kb = 32; + /* Register extent status tree shrinker */ + ext4_es_register_shrinker(sb); + /* * set up enough so that it can read an inode */ @@ -4008,7 +3936,7 @@ no_journal: !(sb->s_flags & MS_RDONLY)) { err = ext4_enable_quotas(sb); if (err) - goto failed_mount7; + goto failed_mount8; } #endif /* CONFIG_QUOTA */ @@ -4035,6 +3963,10 @@ cantfind_ext4: ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); goto failed_mount; +#ifdef CONFIG_QUOTA +failed_mount8: + kobject_del(&sbi->s_kobj); +#endif failed_mount7: ext4_unregister_li_request(sb); failed_mount6: @@ -4476,16 +4408,12 @@ static void ext4_clear_journal_err(struct super_block *sb, int ext4_force_commit(struct super_block *sb) { journal_t *journal; - int ret = 0; if (sb->s_flags & MS_RDONLY) return 0; journal = EXT4_SB(sb)->s_journal; - if (journal) - ret = ext4_journal_force_commit(journal); - - return ret; + return ext4_journal_force_commit(journal); } static int ext4_sync_fs(struct super_block *sb, int wait) @@ -4588,7 +4516,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; int err = 0; #ifdef CONFIG_QUOTA - int i; + int i, j; #endif char *orig_data = kstrdup(data, GFP_KERNEL); @@ -4604,7 +4532,16 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) #ifdef CONFIG_QUOTA old_opts.s_jquota_fmt = sbi->s_jquota_fmt; for (i = 0; i < MAXQUOTAS; i++) - old_opts.s_qf_names[i] = sbi->s_qf_names[i]; + if (sbi->s_qf_names[i]) { + old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], + GFP_KERNEL); + if (!old_opts.s_qf_names[i]) { + for (j = 0; j < i; j++) + kfree(old_opts.s_qf_names[j]); + return -ENOMEM; + } + } else + old_opts.s_qf_names[i] = NULL; #endif if (sbi->s_journal && sbi->s_journal->j_task->io_context) journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; @@ -4737,9 +4674,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) #ifdef CONFIG_QUOTA /* Release old quota file names */ for (i = 0; i < MAXQUOTAS; i++) - if (old_opts.s_qf_names[i] && - old_opts.s_qf_names[i] != sbi->s_qf_names[i]) - kfree(old_opts.s_qf_names[i]); + kfree(old_opts.s_qf_names[i]); if (enable_quota) { if (sb_any_quota_suspended(sb)) dquot_resume(sb, -1); @@ -4768,9 +4703,7 @@ restore_opts: #ifdef CONFIG_QUOTA sbi->s_jquota_fmt = old_opts.s_jquota_fmt; for (i = 0; i < MAXQUOTAS; i++) { - if (sbi->s_qf_names[i] && - old_opts.s_qf_names[i] != sbi->s_qf_names[i]) - kfree(sbi->s_qf_names[i]); + kfree(sbi->s_qf_names[i]); sbi->s_qf_names[i] = old_opts.s_qf_names[i]; } #endif @@ -4835,7 +4768,7 @@ static int ext4_write_dquot(struct dquot *dquot) struct inode *inode; inode = dquot_to_inode(dquot); - handle = ext4_journal_start(inode, + handle = ext4_journal_start(inode, EXT4_HT_QUOTA, EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); if (IS_ERR(handle)) return PTR_ERR(handle); @@ -4851,7 +4784,7 @@ static int ext4_acquire_dquot(struct dquot *dquot) int ret, err; handle_t *handle; - handle = ext4_journal_start(dquot_to_inode(dquot), + handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); if (IS_ERR(handle)) return PTR_ERR(handle); @@ -4867,7 +4800,7 @@ static int ext4_release_dquot(struct dquot *dquot) int ret, err; handle_t *handle; - handle = ext4_journal_start(dquot_to_inode(dquot), + handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); if (IS_ERR(handle)) { /* Release dquot anyway to avoid endless cycle in dqput() */ @@ -4899,7 +4832,7 @@ static int ext4_write_info(struct super_block *sb, int type) handle_t *handle; /* Data block + inode block */ - handle = ext4_journal_start(sb->s_root->d_inode, 2); + handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); if (IS_ERR(handle)) return PTR_ERR(handle); ret = dquot_commit_info(sb, type); @@ -5005,9 +4938,9 @@ static int ext4_enable_quotas(struct super_block *sb) DQUOT_USAGE_ENABLED); if (err) { ext4_warning(sb, - "Failed to enable quota (type=%d) " - "tracking. Please run e2fsck to fix.", - type); + "Failed to enable quota tracking " + "(type=%d, err=%d). Please run " + "e2fsck to fix.", type, err); return err; } } @@ -5045,7 +4978,7 @@ static int ext4_quota_off(struct super_block *sb, int type) /* Update modification times of quota files when userspace can * start looking at them */ - handle = ext4_journal_start(inode, 1); + handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); if (IS_ERR(handle)) goto out; inode->i_mtime = inode->i_ctime = CURRENT_TIME; diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 3a91ebc..3a120b2 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -549,7 +549,7 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode, error = ext4_handle_dirty_xattr_block(handle, inode, bh); if (IS_SYNC(inode)) ext4_handle_sync(handle); - dquot_free_block(inode, 1); + dquot_free_block(inode, EXT4_C2B(EXT4_SB(inode->i_sb), 1)); ea_bdebug(bh, "refcount now=%d; releasing", le32_to_cpu(BHDR(bh)->h_refcount)); } @@ -832,7 +832,8 @@ inserted: else { /* The old block is released after updating the inode. */ - error = dquot_alloc_block(inode, 1); + error = dquot_alloc_block(inode, + EXT4_C2B(EXT4_SB(sb), 1)); if (error) goto cleanup; error = ext4_journal_get_write_access(handle, @@ -886,17 +887,18 @@ inserted: (unsigned long long)block); new_bh = sb_getblk(sb, block); - if (!new_bh) { + if (unlikely(!new_bh)) { + error = -ENOMEM; getblk_failed: ext4_free_blocks(handle, inode, NULL, block, 1, EXT4_FREE_BLOCKS_METADATA); - error = -EIO; goto cleanup; } lock_buffer(new_bh); error = ext4_journal_get_create_access(handle, new_bh); if (error) { unlock_buffer(new_bh); + error = -EIO; goto getblk_failed; } memcpy(new_bh->b_data, s->base, new_bh->b_size); @@ -928,7 +930,7 @@ cleanup: return error; cleanup_dquot: - dquot_free_block(inode, 1); + dquot_free_block(inode, EXT4_C2B(EXT4_SB(sb), 1)); goto cleanup; bad_block: @@ -1164,17 +1166,10 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name, { handle_t *handle; int error, retries = 0; - int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb); + int credits = ext4_jbd2_credits_xattr(inode); retry: - /* - * In case of inline data, we may push out the data to a block, - * So reserve the journal space first. - */ - if (ext4_has_inline_data(inode)) - credits += ext4_writepage_trans_blocks(inode) + 1; - - handle = ext4_journal_start(inode, credits); + handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits); if (IS_ERR(handle)) { error = PTR_ERR(handle); } else { diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index 69eda78..aa25deb 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -125,74 +125,6 @@ extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode, struct ext4_xattr_info *i, struct ext4_xattr_ibody_find *is); -extern int ext4_has_inline_data(struct inode *inode); -extern int ext4_get_inline_size(struct inode *inode); -extern int ext4_get_max_inline_size(struct inode *inode); -extern int ext4_find_inline_data_nolock(struct inode *inode); -extern void ext4_write_inline_data(struct inode *inode, - struct ext4_iloc *iloc, - void *buffer, loff_t pos, - unsigned int len); -extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode, - unsigned int len); -extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, - unsigned int len); -extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); - -extern int ext4_readpage_inline(struct inode *inode, struct page *page); -extern int ext4_try_to_write_inline_data(struct address_space *mapping, - struct inode *inode, - loff_t pos, unsigned len, - unsigned flags, - struct page **pagep); -extern int ext4_write_inline_data_end(struct inode *inode, - loff_t pos, unsigned len, - unsigned copied, - struct page *page); -extern struct buffer_head * -ext4_journalled_write_inline_data(struct inode *inode, - unsigned len, - struct page *page); -extern int ext4_da_write_inline_data_begin(struct address_space *mapping, - struct inode *inode, - loff_t pos, unsigned len, - unsigned flags, - struct page **pagep, - void **fsdata); -extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, - unsigned len, unsigned copied, - struct page *page); -extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry, - struct inode *inode); -extern int ext4_try_create_inline_dir(handle_t *handle, - struct inode *parent, - struct inode *inode); -extern int ext4_read_inline_dir(struct file *filp, - void *dirent, filldir_t filldir, - int *has_inline_data); -extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, - const struct qstr *d_name, - struct ext4_dir_entry_2 **res_dir, - int *has_inline_data); -extern int ext4_delete_inline_entry(handle_t *handle, - struct inode *dir, - struct ext4_dir_entry_2 *de_del, - struct buffer_head *bh, - int *has_inline_data); -extern int empty_inline_dir(struct inode *dir, int *has_inline_data); -extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, - struct ext4_dir_entry_2 **parent_de, - int *retval); -extern int ext4_inline_data_fiemap(struct inode *inode, - struct fiemap_extent_info *fieinfo, - int *has_inline); -extern int ext4_try_to_evict_inline_data(handle_t *handle, - struct inode *inode, - int needed); -extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline); - -extern int ext4_convert_inline_data(struct inode *inode); - #ifdef CONFIG_EXT4_FS_SECURITY extern int ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir, const struct qstr *qstr); diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index 3091d42..750c701 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -435,7 +435,12 @@ void jbd2_journal_commit_transaction(journal_t *journal) trace_jbd2_commit_locking(journal, commit_transaction); stats.run.rs_wait = commit_transaction->t_max_wait; + stats.run.rs_request_delay = 0; stats.run.rs_locked = jiffies; + if (commit_transaction->t_requested) + stats.run.rs_request_delay = + jbd2_time_diff(commit_transaction->t_requested, + stats.run.rs_locked); stats.run.rs_running = jbd2_time_diff(commit_transaction->t_start, stats.run.rs_locked); @@ -1116,7 +1121,10 @@ restart_loop: */ spin_lock(&journal->j_history_lock); journal->j_stats.ts_tid++; + if (commit_transaction->t_requested) + journal->j_stats.ts_requested++; journal->j_stats.run.rs_wait += stats.run.rs_wait; + journal->j_stats.run.rs_request_delay += stats.run.rs_request_delay; journal->j_stats.run.rs_running += stats.run.rs_running; journal->j_stats.run.rs_locked += stats.run.rs_locked; journal->j_stats.run.rs_flushing += stats.run.rs_flushing; diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index dbf41f9..ed10991 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -35,7 +35,6 @@ #include <linux/kthread.h> #include <linux/poison.h> #include <linux/proc_fs.h> -#include <linux/debugfs.h> #include <linux/seq_file.h> #include <linux/math64.h> #include <linux/hash.h> @@ -51,6 +50,14 @@ #include <asm/uaccess.h> #include <asm/page.h> +#ifdef CONFIG_JBD2_DEBUG +ushort jbd2_journal_enable_debug __read_mostly; +EXPORT_SYMBOL(jbd2_journal_enable_debug); + +module_param_named(jbd2_debug, jbd2_journal_enable_debug, ushort, 0644); +MODULE_PARM_DESC(jbd2_debug, "Debugging level for jbd2"); +#endif + EXPORT_SYMBOL(jbd2_journal_extend); EXPORT_SYMBOL(jbd2_journal_stop); EXPORT_SYMBOL(jbd2_journal_lock_updates); @@ -513,6 +520,10 @@ int __jbd2_log_space_left(journal_t *journal) */ int __jbd2_log_start_commit(journal_t *journal, tid_t target) { + /* Return if the txn has already requested to be committed */ + if (journal->j_commit_request == target) + return 0; + /* * The only transaction we can possibly wait upon is the * currently running transaction (if it exists). Otherwise, @@ -529,6 +540,7 @@ int __jbd2_log_start_commit(journal_t *journal, tid_t target) jbd_debug(1, "JBD2: requesting commit %d/%d\n", journal->j_commit_request, journal->j_commit_sequence); + journal->j_running_transaction->t_requested = jiffies; wake_up(&journal->j_wait_commit); return 1; } else if (!tid_geq(journal->j_commit_request, target)) @@ -894,13 +906,18 @@ static int jbd2_seq_info_show(struct seq_file *seq, void *v) if (v != SEQ_START_TOKEN) return 0; - seq_printf(seq, "%lu transaction, each up to %u blocks\n", - s->stats->ts_tid, - s->journal->j_max_transaction_buffers); + seq_printf(seq, "%lu transactions (%lu requested), " + "each up to %u blocks\n", + s->stats->ts_tid, s->stats->ts_requested, + s->journal->j_max_transaction_buffers); if (s->stats->ts_tid == 0) return 0; seq_printf(seq, "average: \n %ums waiting for transaction\n", jiffies_to_msecs(s->stats->run.rs_wait / s->stats->ts_tid)); + seq_printf(seq, " %ums request delay\n", + (s->stats->ts_requested == 0) ? 0 : + jiffies_to_msecs(s->stats->run.rs_request_delay / + s->stats->ts_requested)); seq_printf(seq, " %ums running transaction\n", jiffies_to_msecs(s->stats->run.rs_running / s->stats->ts_tid)); seq_printf(seq, " %ums transaction was being locked\n", @@ -2485,45 +2502,6 @@ restart: spin_unlock(&journal->j_list_lock); } -/* - * debugfs tunables - */ -#ifdef CONFIG_JBD2_DEBUG -u8 jbd2_journal_enable_debug __read_mostly; -EXPORT_SYMBOL(jbd2_journal_enable_debug); - -#define JBD2_DEBUG_NAME "jbd2-debug" - -static struct dentry *jbd2_debugfs_dir; -static struct dentry *jbd2_debug; - -static void __init jbd2_create_debugfs_entry(void) -{ - jbd2_debugfs_dir = debugfs_create_dir("jbd2", NULL); - if (jbd2_debugfs_dir) - jbd2_debug = debugfs_create_u8(JBD2_DEBUG_NAME, - S_IRUGO | S_IWUSR, - jbd2_debugfs_dir, - &jbd2_journal_enable_debug); -} - -static void __exit jbd2_remove_debugfs_entry(void) -{ - debugfs_remove(jbd2_debug); - debugfs_remove(jbd2_debugfs_dir); -} - -#else - -static void __init jbd2_create_debugfs_entry(void) -{ -} - -static void __exit jbd2_remove_debugfs_entry(void) -{ -} - -#endif #ifdef CONFIG_PROC_FS @@ -2609,7 +2587,6 @@ static int __init journal_init(void) ret = journal_init_caches(); if (ret == 0) { - jbd2_create_debugfs_entry(); jbd2_create_jbd_stats_proc_entry(); } else { jbd2_journal_destroy_caches(); @@ -2624,7 +2601,6 @@ static void __exit journal_exit(void) if (n) printk(KERN_EMERG "JBD2: leaked %d journal_heads!\n", n); #endif - jbd2_remove_debugfs_entry(); jbd2_remove_jbd_stats_proc_entry(); jbd2_journal_destroy_caches(); } diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index df9f297..b7e2385 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -30,6 +30,8 @@ #include <linux/bug.h> #include <linux/module.h> +#include <trace/events/jbd2.h> + static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh); static void __jbd2_journal_unfile_buffer(struct journal_head *jh); @@ -100,6 +102,7 @@ jbd2_get_transaction(journal_t *journal, transaction_t *transaction) journal->j_running_transaction = transaction; transaction->t_max_wait = 0; transaction->t_start = jiffies; + transaction->t_requested = 0; return transaction; } @@ -306,6 +309,8 @@ repeat: */ update_t_max_wait(transaction, ts); handle->h_transaction = transaction; + handle->h_requested_credits = nblocks; + handle->h_start_jiffies = jiffies; atomic_inc(&transaction->t_updates); atomic_inc(&transaction->t_handle_count); jbd_debug(4, "Handle %p given %d credits (total %d, free %d)\n", @@ -352,7 +357,8 @@ static handle_t *new_handle(int nblocks) * Return a pointer to a newly allocated handle, or an ERR_PTR() value * on failure. */ -handle_t *jbd2__journal_start(journal_t *journal, int nblocks, gfp_t gfp_mask) +handle_t *jbd2__journal_start(journal_t *journal, int nblocks, gfp_t gfp_mask, + unsigned int type, unsigned int line_no) { handle_t *handle = journal_current_handle(); int err; @@ -378,6 +384,11 @@ handle_t *jbd2__journal_start(journal_t *journal, int nblocks, gfp_t gfp_mask) current->journal_info = NULL; handle = ERR_PTR(err); } + handle->h_type = type; + handle->h_line_no = line_no; + trace_jbd2_handle_start(journal->j_fs_dev->bd_dev, + handle->h_transaction->t_tid, type, + line_no, nblocks); return handle; } EXPORT_SYMBOL(jbd2__journal_start); @@ -385,7 +396,7 @@ EXPORT_SYMBOL(jbd2__journal_start); handle_t *jbd2_journal_start(journal_t *journal, int nblocks) { - return jbd2__journal_start(journal, nblocks, GFP_NOFS); + return jbd2__journal_start(journal, nblocks, GFP_NOFS, 0, 0); } EXPORT_SYMBOL(jbd2_journal_start); @@ -447,7 +458,14 @@ int jbd2_journal_extend(handle_t *handle, int nblocks) goto unlock; } + trace_jbd2_handle_extend(journal->j_fs_dev->bd_dev, + handle->h_transaction->t_tid, + handle->h_type, handle->h_line_no, + handle->h_buffer_credits, + nblocks); + handle->h_buffer_credits += nblocks; + handle->h_requested_credits += nblocks; atomic_add(nblocks, &transaction->t_outstanding_credits); result = 0; @@ -1376,6 +1394,13 @@ int jbd2_journal_stop(handle_t *handle) } jbd_debug(4, "Handle %p going down\n", handle); + trace_jbd2_handle_stats(journal->j_fs_dev->bd_dev, + handle->h_transaction->t_tid, + handle->h_type, handle->h_line_no, + jiffies - handle->h_start_jiffies, + handle->h_sync, handle->h_requested_credits, + (handle->h_requested_credits - + handle->h_buffer_credits)); /* * Implement synchronous transaction batching. If the handle diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index e30b663..50e5a5e 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -20,7 +20,6 @@ #ifndef __KERNEL__ #include "jfs_compat.h" #define JBD2_DEBUG -#define jfs_debug jbd_debug #else #include <linux/types.h> @@ -57,7 +56,7 @@ * CONFIG_JBD2_DEBUG is on. */ #define JBD2_EXPENSIVE_CHECKING -extern u8 jbd2_journal_enable_debug; +extern ushort jbd2_journal_enable_debug; #define jbd_debug(n, f, a...) \ do { \ @@ -397,35 +396,18 @@ struct jbd2_journal_handle int h_err; /* Flags [no locking] */ - unsigned int h_sync:1; /* sync-on-close */ - unsigned int h_jdata:1; /* force data journaling */ - unsigned int h_aborted:1; /* fatal error on handle */ - unsigned int h_cowing:1; /* COWing block to snapshot */ - - /* Number of buffers requested by user: - * (before adding the COW credits factor) */ - unsigned int h_base_credits:14; - - /* Number of buffers the user is allowed to dirty: - * (counts only buffers dirtied when !h_cowing) */ - unsigned int h_user_credits:14; + unsigned int h_sync: 1; /* sync-on-close */ + unsigned int h_jdata: 1; /* force data journaling */ + unsigned int h_aborted: 1; /* fatal error on handle */ + unsigned int h_type: 8; /* for handle statistics */ + unsigned int h_line_no: 16; /* for handle statistics */ + unsigned long h_start_jiffies; + unsigned int h_requested_credits; #ifdef CONFIG_DEBUG_LOCK_ALLOC struct lockdep_map h_lockdep_map; #endif - -#ifdef CONFIG_JBD2_DEBUG - /* COW debugging counters: */ - unsigned int h_cow_moved; /* blocks moved to snapshot */ - unsigned int h_cow_copied; /* blocks copied to snapshot */ - unsigned int h_cow_ok_jh; /* blocks already COWed during current - transaction */ - unsigned int h_cow_ok_bitmap; /* blocks not set in COW bitmap */ - unsigned int h_cow_ok_mapped;/* blocks already mapped in snapshot */ - unsigned int h_cow_bitmaps; /* COW bitmaps created */ - unsigned int h_cow_excluded; /* blocks set in exclude bitmap */ -#endif }; @@ -581,6 +563,11 @@ struct transaction_s unsigned long t_start; /* + * When commit was requested + */ + unsigned long t_requested; + + /* * Checkpointing stats [j_checkpoint_sem] */ struct transaction_chp_stats_s t_chp_stats; @@ -637,6 +624,7 @@ struct transaction_s struct transaction_run_stats_s { unsigned long rs_wait; + unsigned long rs_request_delay; unsigned long rs_running; unsigned long rs_locked; unsigned long rs_flushing; @@ -649,6 +637,7 @@ struct transaction_run_stats_s { struct transaction_stats_s { unsigned long ts_tid; + unsigned long ts_requested; struct transaction_run_stats_s run; }; @@ -1086,7 +1075,8 @@ static inline handle_t *journal_current_handle(void) */ extern handle_t *jbd2_journal_start(journal_t *, int nblocks); -extern handle_t *jbd2__journal_start(journal_t *, int nblocks, gfp_t gfp_mask); +extern handle_t *jbd2__journal_start(journal_t *, int nblocks, gfp_t gfp_mask, + unsigned int type, unsigned int line_no); extern int jbd2_journal_restart(handle_t *, int nblocks); extern int jbd2__journal_restart(handle_t *, int nblocks, gfp_t gfp_mask); extern int jbd2_journal_extend (handle_t *, int nblocks); diff --git a/include/linux/quota.h b/include/linux/quota.h index 58fdef12..d133711 100644 --- a/include/linux/quota.h +++ b/include/linux/quota.h @@ -405,6 +405,7 @@ struct quota_module_name { #define INIT_QUOTA_MODULE_NAMES {\ {QFMT_VFS_OLD, "quota_v1"},\ {QFMT_VFS_V0, "quota_v2"},\ + {QFMT_VFS_V1, "quota_v2"},\ {0, NULL}} #endif /* _QUOTA_ */ diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index 7e8c36b..c0457c0 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -1324,6 +1324,31 @@ TRACE_EVENT(ext4_fallocate_exit, __entry->ret) ); +TRACE_EVENT(ext4_punch_hole, + TP_PROTO(struct inode *inode, loff_t offset, loff_t len), + + TP_ARGS(inode, offset, len), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( ino_t, ino ) + __field( loff_t, offset ) + __field( loff_t, len ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->offset = offset; + __entry->len = len; + ), + + TP_printk("dev %d,%d ino %lu offset %lld len %lld", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long) __entry->ino, + __entry->offset, __entry->len) +); + TRACE_EVENT(ext4_unlink_enter, TP_PROTO(struct inode *parent, struct dentry *dentry), @@ -2068,103 +2093,226 @@ TRACE_EVENT(ext4_ext_remove_space_done, ); TRACE_EVENT(ext4_es_insert_extent, - TP_PROTO(struct inode *inode, ext4_lblk_t start, ext4_lblk_t len), + TP_PROTO(struct inode *inode, struct extent_status *es), - TP_ARGS(inode, start, len), + TP_ARGS(inode, es), TP_STRUCT__entry( - __field( dev_t, dev ) - __field( ino_t, ino ) - __field( loff_t, start ) - __field( loff_t, len ) + __field( dev_t, dev ) + __field( ino_t, ino ) + __field( ext4_lblk_t, lblk ) + __field( ext4_lblk_t, len ) + __field( ext4_fsblk_t, pblk ) + __field( unsigned long long, status ) ), TP_fast_assign( __entry->dev = inode->i_sb->s_dev; __entry->ino = inode->i_ino; - __entry->start = start; - __entry->len = len; + __entry->lblk = es->es_lblk; + __entry->len = es->es_len; + __entry->pblk = ext4_es_pblock(es); + __entry->status = ext4_es_status(es); ), - TP_printk("dev %d,%d ino %lu es [%lld/%lld)", + TP_printk("dev %d,%d ino %lu es [%u/%u) mapped %llu status %llx", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long) __entry->ino, - __entry->start, __entry->len) + __entry->lblk, __entry->len, + __entry->pblk, __entry->status) ); TRACE_EVENT(ext4_es_remove_extent, - TP_PROTO(struct inode *inode, ext4_lblk_t start, ext4_lblk_t len), + TP_PROTO(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len), - TP_ARGS(inode, start, len), + TP_ARGS(inode, lblk, len), TP_STRUCT__entry( __field( dev_t, dev ) __field( ino_t, ino ) - __field( loff_t, start ) + __field( loff_t, lblk ) __field( loff_t, len ) ), TP_fast_assign( __entry->dev = inode->i_sb->s_dev; __entry->ino = inode->i_ino; - __entry->start = start; + __entry->lblk = lblk; __entry->len = len; ), TP_printk("dev %d,%d ino %lu es [%lld/%lld)", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long) __entry->ino, - __entry->start, __entry->len) + __entry->lblk, __entry->len) ); -TRACE_EVENT(ext4_es_find_extent_enter, - TP_PROTO(struct inode *inode, ext4_lblk_t start), +TRACE_EVENT(ext4_es_find_delayed_extent_enter, + TP_PROTO(struct inode *inode, ext4_lblk_t lblk), - TP_ARGS(inode, start), + TP_ARGS(inode, lblk), TP_STRUCT__entry( __field( dev_t, dev ) __field( ino_t, ino ) - __field( ext4_lblk_t, start ) + __field( ext4_lblk_t, lblk ) ), TP_fast_assign( __entry->dev = inode->i_sb->s_dev; __entry->ino = inode->i_ino; - __entry->start = start; + __entry->lblk = lblk; ), - TP_printk("dev %d,%d ino %lu start %u", + TP_printk("dev %d,%d ino %lu lblk %u", MAJOR(__entry->dev), MINOR(__entry->dev), - (unsigned long) __entry->ino, __entry->start) + (unsigned long) __entry->ino, __entry->lblk) ); -TRACE_EVENT(ext4_es_find_extent_exit, - TP_PROTO(struct inode *inode, struct extent_status *es, - ext4_lblk_t ret), +TRACE_EVENT(ext4_es_find_delayed_extent_exit, + TP_PROTO(struct inode *inode, struct extent_status *es), - TP_ARGS(inode, es, ret), + TP_ARGS(inode, es), TP_STRUCT__entry( __field( dev_t, dev ) __field( ino_t, ino ) - __field( ext4_lblk_t, start ) + __field( ext4_lblk_t, lblk ) __field( ext4_lblk_t, len ) - __field( ext4_lblk_t, ret ) + __field( ext4_fsblk_t, pblk ) + __field( unsigned long long, status ) ), TP_fast_assign( __entry->dev = inode->i_sb->s_dev; __entry->ino = inode->i_ino; - __entry->start = es->start; - __entry->len = es->len; - __entry->ret = ret; + __entry->lblk = es->es_lblk; + __entry->len = es->es_len; + __entry->pblk = ext4_es_pblock(es); + __entry->status = ext4_es_status(es); ), - TP_printk("dev %d,%d ino %lu es [%u/%u) ret %u", + TP_printk("dev %d,%d ino %lu es [%u/%u) mapped %llu status %llx", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long) __entry->ino, - __entry->start, __entry->len, __entry->ret) + __entry->lblk, __entry->len, + __entry->pblk, __entry->status) +); + +TRACE_EVENT(ext4_es_lookup_extent_enter, + TP_PROTO(struct inode *inode, ext4_lblk_t lblk), + + TP_ARGS(inode, lblk), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( ino_t, ino ) + __field( ext4_lblk_t, lblk ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->lblk = lblk; + ), + + TP_printk("dev %d,%d ino %lu lblk %u", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long) __entry->ino, __entry->lblk) +); + +TRACE_EVENT(ext4_es_lookup_extent_exit, + TP_PROTO(struct inode *inode, struct extent_status *es, + int found), + + TP_ARGS(inode, es, found), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( ino_t, ino ) + __field( ext4_lblk_t, lblk ) + __field( ext4_lblk_t, len ) + __field( ext4_fsblk_t, pblk ) + __field( unsigned long long, status ) + __field( int, found ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->lblk = es->es_lblk; + __entry->len = es->es_len; + __entry->pblk = ext4_es_pblock(es); + __entry->status = ext4_es_status(es); + __entry->found = found; + ), + + TP_printk("dev %d,%d ino %lu found %d [%u/%u) %llu %llx", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long) __entry->ino, __entry->found, + __entry->lblk, __entry->len, + __entry->found ? __entry->pblk : 0, + __entry->found ? __entry->status : 0) +); + +TRACE_EVENT(ext4_es_reclaim_extents_count, + TP_PROTO(struct super_block *sb, int nr_cached), + + TP_ARGS(sb, nr_cached), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( int, nr_cached ) + ), + + TP_fast_assign( + __entry->dev = sb->s_dev; + __entry->nr_cached = nr_cached; + ), + + TP_printk("dev %d,%d cached objects nr %d", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->nr_cached) +); + +TRACE_EVENT(ext4_es_shrink_enter, + TP_PROTO(struct super_block *sb, int nr_to_scan), + + TP_ARGS(sb, nr_to_scan), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( int, nr_to_scan ) + ), + + TP_fast_assign( + __entry->dev = sb->s_dev; + __entry->nr_to_scan = nr_to_scan; + ), + + TP_printk("dev %d,%d nr to scan %d", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->nr_to_scan) +); + +TRACE_EVENT(ext4_es_shrink_exit, + TP_PROTO(struct super_block *sb, int shrunk_nr), + + TP_ARGS(sb, shrunk_nr), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( int, shrunk_nr ) + ), + + TP_fast_assign( + __entry->dev = sb->s_dev; + __entry->shrunk_nr = shrunk_nr; + ), + + TP_printk("dev %d,%d nr to scan %d", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->shrunk_nr) ); #endif /* _TRACE_EXT4_H */ diff --git a/include/trace/events/jbd2.h b/include/trace/events/jbd2.h index 127993d..070df49 100644 --- a/include/trace/events/jbd2.h +++ b/include/trace/events/jbd2.h @@ -132,6 +132,104 @@ TRACE_EVENT(jbd2_submit_inode_data, (unsigned long) __entry->ino) ); +TRACE_EVENT(jbd2_handle_start, + TP_PROTO(dev_t dev, unsigned long tid, unsigned int type, + unsigned int line_no, int requested_blocks), + + TP_ARGS(dev, tid, type, line_no, requested_blocks), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( unsigned long, tid ) + __field( unsigned int, type ) + __field( unsigned int, line_no ) + __field( int, requested_blocks) + ), + + TP_fast_assign( + __entry->dev = dev; + __entry->tid = tid; + __entry->type = type; + __entry->line_no = line_no; + __entry->requested_blocks = requested_blocks; + ), + + TP_printk("dev %d,%d tid %lu type %u line_no %u " + "requested_blocks %d", + MAJOR(__entry->dev), MINOR(__entry->dev), __entry->tid, + __entry->type, __entry->line_no, __entry->requested_blocks) +); + +TRACE_EVENT(jbd2_handle_extend, + TP_PROTO(dev_t dev, unsigned long tid, unsigned int type, + unsigned int line_no, int buffer_credits, + int requested_blocks), + + TP_ARGS(dev, tid, type, line_no, buffer_credits, requested_blocks), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( unsigned long, tid ) + __field( unsigned int, type ) + __field( unsigned int, line_no ) + __field( int, buffer_credits ) + __field( int, requested_blocks) + ), + + TP_fast_assign( + __entry->dev = dev; + __entry->tid = tid; + __entry->type = type; + __entry->line_no = line_no; + __entry->buffer_credits = buffer_credits; + __entry->requested_blocks = requested_blocks; + ), + + TP_printk("dev %d,%d tid %lu type %u line_no %u " + "buffer_credits %d requested_blocks %d", + MAJOR(__entry->dev), MINOR(__entry->dev), __entry->tid, + __entry->type, __entry->line_no, __entry->buffer_credits, + __entry->requested_blocks) +); + +TRACE_EVENT(jbd2_handle_stats, + TP_PROTO(dev_t dev, unsigned long tid, unsigned int type, + unsigned int line_no, int interval, int sync, + int requested_blocks, int dirtied_blocks), + + TP_ARGS(dev, tid, type, line_no, interval, sync, + requested_blocks, dirtied_blocks), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( unsigned long, tid ) + __field( unsigned int, type ) + __field( unsigned int, line_no ) + __field( int, interval ) + __field( int, sync ) + __field( int, requested_blocks) + __field( int, dirtied_blocks ) + ), + + TP_fast_assign( + __entry->dev = dev; + __entry->tid = tid; + __entry->type = type; + __entry->line_no = line_no; + __entry->interval = interval; + __entry->sync = sync; + __entry->requested_blocks = requested_blocks; + __entry->dirtied_blocks = dirtied_blocks; + ), + + TP_printk("dev %d,%d tid %lu type %u line_no %u interval %d " + "sync %d requested_blocks %d dirtied_blocks %d", + MAJOR(__entry->dev), MINOR(__entry->dev), __entry->tid, + __entry->type, __entry->line_no, __entry->interval, + __entry->sync, __entry->requested_blocks, + __entry->dirtied_blocks) +); + TRACE_EVENT(jbd2_run_stats, TP_PROTO(dev_t dev, unsigned long tid, struct transaction_run_stats_s *stats), @@ -142,6 +240,7 @@ TRACE_EVENT(jbd2_run_stats, __field( dev_t, dev ) __field( unsigned long, tid ) __field( unsigned long, wait ) + __field( unsigned long, request_delay ) __field( unsigned long, running ) __field( unsigned long, locked ) __field( unsigned long, flushing ) @@ -155,6 +254,7 @@ TRACE_EVENT(jbd2_run_stats, __entry->dev = dev; __entry->tid = tid; __entry->wait = stats->rs_wait; + __entry->request_delay = stats->rs_request_delay; __entry->running = stats->rs_running; __entry->locked = stats->rs_locked; __entry->flushing = stats->rs_flushing; @@ -164,10 +264,12 @@ TRACE_EVENT(jbd2_run_stats, __entry->blocks_logged = stats->rs_blocks_logged; ), - TP_printk("dev %d,%d tid %lu wait %u running %u locked %u flushing %u " - "logging %u handle_count %u blocks %u blocks_logged %u", + TP_printk("dev %d,%d tid %lu wait %u request_delay %u running %u " + "locked %u flushing %u logging %u handle_count %u " + "blocks %u blocks_logged %u", MAJOR(__entry->dev), MINOR(__entry->dev), __entry->tid, jiffies_to_msecs(__entry->wait), + jiffies_to_msecs(__entry->request_delay), jiffies_to_msecs(__entry->running), jiffies_to_msecs(__entry->locked), jiffies_to_msecs(__entry->flushing), |
