diff options
| -rw-r--r-- | fs/ext4/ext4.h | 10 | ||||
| -rw-r--r-- | fs/ext4/extents.c | 24 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 67 | ||||
| -rw-r--r-- | fs/ext4/mballoc.c | 49 | ||||
| -rw-r--r-- | fs/ext4/migrate.c | 23 | ||||
| -rw-r--r-- | fs/ext4/xattr.c | 8 | ||||
| -rw-r--r-- | include/trace/events/ext4.h | 16 |
7 files changed, 109 insertions, 88 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 210e1b5..4cfc2f0 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -376,6 +376,12 @@ struct ext4_new_group_data { EXT4_GET_BLOCKS_DIO_CREATE_EXT) /* + * Flags used by ext4_free_blocks + */ +#define EXT4_FREE_BLOCKS_METADATA 0x0001 +#define EXT4_FREE_BLOCKS_FORGET 0x0002 + +/* * ioctl commands */ #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS @@ -1384,8 +1390,8 @@ extern void ext4_discard_preallocations(struct inode *); extern int __init init_ext4_mballoc(void); extern void exit_ext4_mballoc(void); extern void ext4_free_blocks(handle_t *handle, struct inode *inode, - ext4_fsblk_t block, unsigned long count, - int metadata); + struct buffer_head *bh, ext4_fsblk_t block, + unsigned long count, int flags); extern int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t i, struct ext4_group_desc *desc); extern int ext4_mb_get_buddy_cache_lock(struct super_block *, ext4_group_t); diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 74dcff8..2c4a932 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -1007,7 +1007,8 @@ cleanup: for (i = 0; i < depth; i++) { if (!ablocks[i]) continue; - ext4_free_blocks(handle, inode, ablocks[i], 1, 1); + ext4_free_blocks(handle, inode, 0, ablocks[i], 1, + EXT4_FREE_BLOCKS_METADATA); } } kfree(ablocks); @@ -1957,7 +1958,6 @@ errout: static int ext4_ext_rm_idx(handle_t *handle, struct inode *inode, struct ext4_ext_path *path) { - struct buffer_head *bh; int err; ext4_fsblk_t leaf; @@ -1973,9 +1973,8 @@ static int ext4_ext_rm_idx(handle_t *handle, struct inode *inode, if (err) return err; ext_debug("index is empty, remove it, free block %llu\n", leaf); - bh = sb_find_get_block(inode->i_sb, leaf); - ext4_forget(handle, 1, inode, bh, leaf); - ext4_free_blocks(handle, inode, leaf, 1, 1); + ext4_free_blocks(handle, inode, 0, leaf, 1, + EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET); return err; } @@ -2042,12 +2041,11 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode, struct ext4_extent *ex, ext4_lblk_t from, ext4_lblk_t to) { - struct buffer_head *bh; unsigned short ee_len = ext4_ext_get_actual_len(ex); - int i, metadata = 0; + int flags = EXT4_FREE_BLOCKS_FORGET; if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) - metadata = 1; + flags |= EXT4_FREE_BLOCKS_METADATA; #ifdef EXTENTS_STATS { struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); @@ -2072,11 +2070,7 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode, num = le32_to_cpu(ex->ee_block) + ee_len - from; start = ext_pblock(ex) + ee_len - num; ext_debug("free last %u blocks starting %llu\n", num, start); - for (i = 0; i < num; i++) { - bh = sb_find_get_block(inode->i_sb, start + i); - ext4_forget(handle, metadata, inode, bh, start + i); - } - ext4_free_blocks(handle, inode, start, num, metadata); + ext4_free_blocks(handle, inode, 0, start, num, flags); } else if (from == le32_to_cpu(ex->ee_block) && to <= le32_to_cpu(ex->ee_block) + ee_len - 1) { printk(KERN_INFO "strange request: removal %u-%u from %u:%u\n", @@ -3319,8 +3313,8 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, /* not a good idea to call discard here directly, * but otherwise we'd need to call it every free() */ ext4_discard_preallocations(inode); - ext4_free_blocks(handle, inode, ext_pblock(&newex), - ext4_ext_get_actual_len(&newex), 0); + ext4_free_blocks(handle, inode, 0, ext_pblock(&newex), + ext4_ext_get_actual_len(&newex), 0); goto out2; } diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 72c6943..3b28e1f 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -669,7 +669,7 @@ allocated: return ret; failed_out: for (i = 0; i < index; i++) - ext4_free_blocks(handle, inode, new_blocks[i], 1, 0); + ext4_free_blocks(handle, inode, 0, new_blocks[i], 1, 0); return ret; } @@ -765,20 +765,20 @@ static int ext4_alloc_branch(handle_t *handle, struct inode *inode, return err; failed: /* Allocation failed, free what we already allocated */ + ext4_free_blocks(handle, inode, 0, new_blocks[0], 1, 0); for (i = 1; i <= n ; i++) { - BUFFER_TRACE(branch[i].bh, "call jbd2_journal_forget"); /* - * Note: is_metadata is 0 because branch[i].bh is - * newly allocated, so there is no need to revoke the - * block. If we do, it's harmless, but not necessary. + * branch[i].bh is newly allocated, so there is no + * need to revoke the block, which is why we don't + * need to set EXT4_FREE_BLOCKS_METADATA. */ - ext4_forget(handle, 0, inode, branch[i].bh, - branch[i].bh->b_blocknr); + ext4_free_blocks(handle, inode, 0, new_blocks[i], 1, + EXT4_FREE_BLOCKS_FORGET); } - for (i = 0; i < indirect_blks; i++) - ext4_free_blocks(handle, inode, new_blocks[i], 1, 0); + for (i = n+1; i < indirect_blks; i++) + ext4_free_blocks(handle, inode, 0, new_blocks[i], 1, 0); - ext4_free_blocks(handle, inode, new_blocks[i], num, 0); + ext4_free_blocks(handle, inode, 0, new_blocks[i], num, 0); return err; } @@ -857,18 +857,16 @@ static int ext4_splice_branch(handle_t *handle, struct inode *inode, err_out: for (i = 1; i <= num; i++) { - BUFFER_TRACE(where[i].bh, "call jbd2_journal_forget"); /* - * Note: is_metadata is 0 because branch[i].bh is - * newly allocated, so there is no need to revoke the - * block. If we do, it's harmless, but not necessary. + * branch[i].bh is newly allocated, so there is no + * need to revoke the block, which is why we don't + * need to set EXT4_FREE_BLOCKS_METADATA. */ - ext4_forget(handle, 0, inode, where[i].bh, - where[i].bh->b_blocknr); - ext4_free_blocks(handle, inode, - le32_to_cpu(where[i-1].key), 1, 0); + ext4_free_blocks(handle, inode, where[i].bh, 0, 1, + EXT4_FREE_BLOCKS_FORGET); } - ext4_free_blocks(handle, inode, le32_to_cpu(where[num].key), blks, 0); + ext4_free_blocks(handle, inode, 0, le32_to_cpu(where[num].key), + blks, 0); return err; } @@ -4080,7 +4078,10 @@ static void ext4_clear_blocks(handle_t *handle, struct inode *inode, __le32 *last) { __le32 *p; - int is_metadata = S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode); + int flags = EXT4_FREE_BLOCKS_FORGET; + + if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) + flags |= EXT4_FREE_BLOCKS_METADATA; if (try_to_extend_transaction(handle, inode)) { if (bh) { @@ -4096,27 +4097,10 @@ static void ext4_clear_blocks(handle_t *handle, struct inode *inode, } } - /* - * Any buffers which are on the journal will be in memory. We - * find them on the hash table so jbd2_journal_revoke() will - * run jbd2_journal_forget() on them. We've already detached - * each block from the file, so bforget() in - * jbd2_journal_forget() should be safe. - * - * AKPM: turn on bforget in jbd2_journal_forget()!!! - */ - for (p = first; p < last; p++) { - u32 nr = le32_to_cpu(*p); - if (nr) { - struct buffer_head *tbh; - - *p = 0; - tbh = sb_find_get_block(inode->i_sb, nr); - ext4_forget(handle, is_metadata, inode, tbh, nr); - } - } + for (p = first; p < last; p++) + *p = 0; - ext4_free_blocks(handle, inode, block_to_free, count, is_metadata); + ext4_free_blocks(handle, inode, 0, block_to_free, count, flags); } /** @@ -4304,7 +4288,8 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode, blocks_for_truncate(inode)); } - ext4_free_blocks(handle, inode, nr, 1, 1); + ext4_free_blocks(handle, inode, 0, nr, 1, + EXT4_FREE_BLOCKS_METADATA); if (parent_bh) { /* diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 0dca90b..78de5d3 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4436,8 +4436,8 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b, * @metadata: Are these metadata blocks */ void ext4_free_blocks(handle_t *handle, struct inode *inode, - ext4_fsblk_t block, unsigned long count, - int metadata) + struct buffer_head *bh, ext4_fsblk_t block, + unsigned long count, int flags) { struct buffer_head *bitmap_bh = NULL; struct super_block *sb = inode->i_sb; @@ -4454,15 +4454,12 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode, int err = 0; int ret; - /* - * We need to make sure we don't reuse the freed block until - * after the transaction is committed, which we can do by - * treating the block as metadata, below. We make an - * exception if the inode is to be written in writeback mode - * since writeback mode has weak data consistency guarantees. - */ - if (!ext4_should_writeback_data(inode)) - metadata = 1; + if (bh) { + if (block) + BUG_ON(block != bh->b_blocknr); + else + block = bh->b_blocknr; + } sbi = EXT4_SB(sb); es = EXT4_SB(sb)->s_es; @@ -4476,7 +4473,32 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode, } ext4_debug("freeing block %llu\n", block); - trace_ext4_free_blocks(inode, block, count, metadata); + trace_ext4_free_blocks(inode, block, count, flags); + + if (flags & EXT4_FREE_BLOCKS_FORGET) { + struct buffer_head *tbh = bh; + int i; + + BUG_ON(bh && (count > 1)); + + for (i = 0; i < count; i++) { + if (!bh) + tbh = sb_find_get_block(inode->i_sb, + block + i); + ext4_forget(handle, flags & EXT4_FREE_BLOCKS_METADATA, + inode, tbh, block + i); + } + } + + /* + * We need to make sure we don't reuse the freed block until + * after the transaction is committed, which we can do by + * treating the block as metadata, below. We make an + * exception if the inode is to be written in writeback mode + * since writeback mode has weak data consistency guarantees. + */ + if (!ext4_should_writeback_data(inode)) + flags |= EXT4_FREE_BLOCKS_METADATA; ac = kmem_cache_alloc(ext4_ac_cachep, GFP_NOFS); if (ac) { @@ -4552,7 +4574,8 @@ do_more: err = ext4_mb_load_buddy(sb, block_group, &e4b); if (err) goto error_return; - if (metadata && ext4_handle_valid(handle)) { + + if ((flags & EXT4_FREE_BLOCKS_METADATA) && ext4_handle_valid(handle)) { struct ext4_free_data *new_entry; /* * blocks being freed are metadata. these blocks shouldn't diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c index a93d5b8..d641e13 100644 --- a/fs/ext4/migrate.c +++ b/fs/ext4/migrate.c @@ -262,13 +262,17 @@ static int free_dind_blocks(handle_t *handle, for (i = 0; i < max_entries; i++) { if (tmp_idata[i]) { extend_credit_for_blkdel(handle, inode); - ext4_free_blocks(handle, inode, - le32_to_cpu(tmp_idata[i]), 1, 1); + ext4_free_blocks(handle, inode, 0, + le32_to_cpu(tmp_idata[i]), 1, + EXT4_FREE_BLOCKS_METADATA | + EXT4_FREE_BLOCKS_FORGET); } } put_bh(bh); extend_credit_for_blkdel(handle, inode); - ext4_free_blocks(handle, inode, le32_to_cpu(i_data), 1, 1); + ext4_free_blocks(handle, inode, 0, le32_to_cpu(i_data), 1, + EXT4_FREE_BLOCKS_METADATA | + EXT4_FREE_BLOCKS_FORGET); return 0; } @@ -297,7 +301,9 @@ static int free_tind_blocks(handle_t *handle, } put_bh(bh); extend_credit_for_blkdel(handle, inode); - ext4_free_blocks(handle, inode, le32_to_cpu(i_data), 1, 1); + ext4_free_blocks(handle, inode, 0, le32_to_cpu(i_data), 1, + EXT4_FREE_BLOCKS_METADATA | + EXT4_FREE_BLOCKS_FORGET); return 0; } @@ -308,8 +314,10 @@ static int free_ind_block(handle_t *handle, struct inode *inode, __le32 *i_data) /* ei->i_data[EXT4_IND_BLOCK] */ if (i_data[0]) { extend_credit_for_blkdel(handle, inode); - ext4_free_blocks(handle, inode, - le32_to_cpu(i_data[0]), 1, 1); + ext4_free_blocks(handle, inode, 0, + le32_to_cpu(i_data[0]), 1, + EXT4_FREE_BLOCKS_METADATA | + EXT4_FREE_BLOCKS_FORGET); } /* ei->i_data[EXT4_DIND_BLOCK] */ @@ -419,7 +427,8 @@ static int free_ext_idx(handle_t *handle, struct inode *inode, } put_bh(bh); extend_credit_for_blkdel(handle, inode); - ext4_free_blocks(handle, inode, block, 1, 1); + ext4_free_blocks(handle, inode, 0, block, 1, + EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET); return retval; } diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 0257019..910bf9a 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -482,9 +482,10 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode, ea_bdebug(bh, "refcount now=0; freeing"); if (ce) mb_cache_entry_free(ce); - ext4_free_blocks(handle, inode, bh->b_blocknr, 1, 1); get_bh(bh); - ext4_forget(handle, 1, inode, bh, bh->b_blocknr); + ext4_free_blocks(handle, inode, bh, 0, 1, + EXT4_FREE_BLOCKS_METADATA | + EXT4_FREE_BLOCKS_FORGET); } else { le32_add_cpu(&BHDR(bh)->h_refcount, -1); error = ext4_handle_dirty_metadata(handle, inode, bh); @@ -832,7 +833,8 @@ inserted: new_bh = sb_getblk(sb, block); if (!new_bh) { getblk_failed: - ext4_free_blocks(handle, inode, block, 1, 1); + ext4_free_blocks(handle, inode, 0, block, 1, + EXT4_FREE_BLOCKS_METADATA); error = -EIO; goto cleanup; } diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index b390e1f..74f628b 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -650,30 +650,32 @@ TRACE_EVENT(ext4_allocate_blocks, TRACE_EVENT(ext4_free_blocks, TP_PROTO(struct inode *inode, __u64 block, unsigned long count, - int metadata), + int flags), - TP_ARGS(inode, block, count, metadata), + TP_ARGS(inode, block, count, flags), TP_STRUCT__entry( __field( dev_t, dev ) __field( ino_t, ino ) + __field( umode_t, mode ) __field( __u64, block ) __field( unsigned long, count ) - __field( int, metadata ) - + __field( int, flags ) ), TP_fast_assign( __entry->dev = inode->i_sb->s_dev; __entry->ino = inode->i_ino; + __entry->mode = inode->i_mode; __entry->block = block; __entry->count = count; - __entry->metadata = metadata; + __entry->flags = flags; ), - TP_printk("dev %s ino %lu block %llu count %lu metadata %d", + TP_printk("dev %s ino %lu mode 0%o block %llu count %lu flags %d", jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino, - __entry->block, __entry->count, __entry->metadata) + __entry->mode, __entry->block, __entry->count, + __entry->flags) ); TRACE_EVENT(ext4_sync_file, |
