diff options
| -rw-r--r-- | fs/ext4/dir.c | 2 | ||||
| -rw-r--r-- | fs/ext4/ext4.h | 22 | ||||
| -rw-r--r-- | fs/ext4/extents.c | 22 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 57 |
4 files changed, 57 insertions, 46 deletions
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 052d637..9dc93168 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -131,7 +131,7 @@ static int ext4_readdir(struct file *filp, struct buffer_head *bh = NULL; map_bh.b_state = 0; - err = ext4_get_blocks(NULL, inode, blk, 1, &map_bh, 0, 0, 0); + err = ext4_get_blocks(NULL, inode, blk, 1, &map_bh, 0); if (err > 0) { pgoff_t index = map_bh.b_blocknr >> (PAGE_CACHE_SHIFT - inode->i_blkbits); diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 5dc8368..17feb4a 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -314,10 +314,20 @@ struct ext4_new_group_data { }; /* - * Following is used by preallocation code to tell get_blocks() that we - * want uninitialzed extents. + * Flags used by ext4_get_blocks() */ -#define EXT4_CREATE_UNINITIALIZED_EXT 2 + /* Allocate any needed blocks and/or convert an unitialized + extent to be an initialized ext4 */ +#define EXT4_GET_BLOCKS_CREATE 1 + /* Request the creation of an unitialized extent */ +#define EXT4_GET_BLOCKS_UNINIT_EXT 2 +#define EXT4_GET_BLOCKS_CREATE_UNINIT_EXT (EXT4_GET_BLOCKS_UNINIT_EXT|\ + EXT4_GET_BLOCKS_CREATE) + /* Update the ext4_inode_info i_disksize field */ +#define EXT4_GET_BLOCKS_EXTEND_DISKSIZE 4 + /* Caller is from the delayed allocation writeout path, + so the filesystem blocks have already been accounted for */ +#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 8 /* * ioctl commands @@ -1610,8 +1620,7 @@ extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, int chunk); extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, unsigned int max_blocks, - struct buffer_head *bh_result, - int create, int extend_disksize); + struct buffer_head *bh_result, int flags); extern void ext4_ext_truncate(struct inode *); extern void ext4_ext_init(struct super_block *); extern void ext4_ext_release(struct super_block *); @@ -1619,8 +1628,7 @@ extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len); extern int ext4_get_blocks(handle_t *handle, struct inode *inode, sector_t block, unsigned int max_blocks, - struct buffer_head *bh, int create, - int extend_disksize, int flag); + struct buffer_head *bh, int flags); extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len); diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 7e7d02d..27c383c 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -2784,7 +2784,7 @@ fix_extent_len: int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, unsigned int max_blocks, struct buffer_head *bh_result, - int create, int extend_disksize) + int flags) { struct ext4_ext_path *path = NULL; struct ext4_extent_header *eh; @@ -2803,7 +2803,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, cache_type = ext4_ext_in_cache(inode, iblock, &newex); if (cache_type) { if (cache_type == EXT4_EXT_CACHE_GAP) { - if (!create) { + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { /* * block isn't allocated yet and * user doesn't want to allocate it @@ -2869,9 +2869,9 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, EXT4_EXT_CACHE_EXTENT); goto out; } - if (create == EXT4_CREATE_UNINITIALIZED_EXT) + if (flags & EXT4_GET_BLOCKS_UNINIT_EXT) goto out; - if (!create) { + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { if (allocated > max_blocks) allocated = max_blocks; /* @@ -2903,7 +2903,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, * requested block isn't allocated yet; * we couldn't try to create block if create flag is zero */ - if (!create) { + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { /* * put just found gap into cache to speed up * subsequent requests @@ -2932,10 +2932,10 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, * EXT_UNINIT_MAX_LEN. */ if (max_blocks > EXT_INIT_MAX_LEN && - create != EXT4_CREATE_UNINITIALIZED_EXT) + !(flags & EXT4_GET_BLOCKS_UNINIT_EXT)) max_blocks = EXT_INIT_MAX_LEN; else if (max_blocks > EXT_UNINIT_MAX_LEN && - create == EXT4_CREATE_UNINITIALIZED_EXT) + (flags & EXT4_GET_BLOCKS_UNINIT_EXT)) max_blocks = EXT_UNINIT_MAX_LEN; /* Check if we can really insert (iblock)::(iblock+max_blocks) extent */ @@ -2966,7 +2966,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, /* try to insert new extent into found leaf and return */ ext4_ext_store_pblock(&newex, newblock); newex.ee_len = cpu_to_le16(ar.len); - if (create == EXT4_CREATE_UNINITIALIZED_EXT) /* Mark uninitialized */ + if (flags & EXT4_GET_BLOCKS_UNINIT_EXT) /* Mark uninitialized */ ext4_ext_mark_uninitialized(&newex); err = ext4_ext_insert_extent(handle, inode, path, &newex); if (err) { @@ -2983,7 +2983,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, newblock = ext_pblock(&newex); allocated = ext4_ext_get_actual_len(&newex); outnew: - if (extend_disksize) { + if (flags & EXT4_GET_BLOCKS_EXTEND_DISKSIZE) { disksize = ((loff_t) iblock + ar.len) << inode->i_blkbits; if (disksize > i_size_read(inode)) disksize = i_size_read(inode); @@ -2994,7 +2994,7 @@ outnew: set_buffer_new(bh_result); /* Cache only when it is _not_ an uninitialized extent */ - if (create != EXT4_CREATE_UNINITIALIZED_EXT) + if ((flags & EXT4_GET_BLOCKS_UNINIT_EXT) == 0) ext4_ext_put_in_cache(inode, iblock, allocated, newblock, EXT4_EXT_CACHE_EXTENT); out: @@ -3153,7 +3153,7 @@ retry: map_bh.b_state = 0; ret = ext4_get_blocks(handle, inode, block, max_blocks, &map_bh, - EXT4_CREATE_UNINITIALIZED_EXT, 0, 0); + EXT4_GET_BLOCKS_CREATE_UNINIT_EXT); if (ret <= 0) { #ifdef EXT4FS_DEBUG WARN_ON(ret <= 0); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index a9a9b9b..8b7564d 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -917,7 +917,7 @@ err_out: static int ext4_ind_get_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, unsigned int maxblocks, struct buffer_head *bh_result, - int create, int extend_disksize) + int flags) { int err = -EIO; ext4_lblk_t offsets[4]; @@ -934,7 +934,7 @@ static int ext4_ind_get_blocks(handle_t *handle, struct inode *inode, J_ASSERT(!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)); - J_ASSERT(handle != NULL || create == 0); + J_ASSERT(handle != NULL || (flags & EXT4_GET_BLOCKS_CREATE) == 0); depth = ext4_block_to_path(inode, iblock, offsets, &blocks_to_boundary); @@ -963,7 +963,7 @@ static int ext4_ind_get_blocks(handle_t *handle, struct inode *inode, } /* Next simple case - plain lookup or failed read of indirect block */ - if (!create || err == -EIO) + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0 || err == -EIO) goto cleanup; /* @@ -1002,7 +1002,7 @@ static int ext4_ind_get_blocks(handle_t *handle, struct inode *inode, * protect it if you're about to implement concurrent * ext4_get_block() -bzzz */ - if (!err && extend_disksize) { + if (!err && (flags & EXT4_GET_BLOCKS_EXTEND_DISKSIZE)) { disksize = ((loff_t) iblock + count) << inode->i_blkbits; if (disksize > i_size_read(inode)) disksize = i_size_read(inode); @@ -1144,7 +1144,7 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used) */ int ext4_get_blocks(handle_t *handle, struct inode *inode, sector_t block, unsigned int max_blocks, struct buffer_head *bh, - int create, int extend_disksize, int flag) + int flags) { int retval; @@ -1158,15 +1158,15 @@ int ext4_get_blocks(handle_t *handle, struct inode *inode, sector_t block, down_read((&EXT4_I(inode)->i_data_sem)); if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) { retval = ext4_ext_get_blocks(handle, inode, block, max_blocks, - bh, 0, 0); + bh, 0); } else { retval = ext4_ind_get_blocks(handle, inode, block, max_blocks, - bh, 0, 0); + bh, 0); } up_read((&EXT4_I(inode)->i_data_sem)); /* If it is only a block(s) look up */ - if (!create) + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) return retval; /* @@ -1205,7 +1205,7 @@ int ext4_get_blocks(handle_t *handle, struct inode *inode, sector_t block, * let the underlying get_block() function know to * avoid double accounting */ - if (flag) + if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) EXT4_I(inode)->i_delalloc_reserved_flag = 1; /* * We need to check for EXT4 here because migrate @@ -1213,10 +1213,10 @@ int ext4_get_blocks(handle_t *handle, struct inode *inode, sector_t block, */ if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) { retval = ext4_ext_get_blocks(handle, inode, block, max_blocks, - bh, create, extend_disksize); + bh, flags); } else { retval = ext4_ind_get_blocks(handle, inode, block, - max_blocks, bh, create, extend_disksize); + max_blocks, bh, flags); if (retval > 0 && buffer_new(bh)) { /* @@ -1229,7 +1229,7 @@ int ext4_get_blocks(handle_t *handle, struct inode *inode, sector_t block, } } - if (flag) { + if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) { EXT4_I(inode)->i_delalloc_reserved_flag = 0; /* * Update reserved blocks/metadata blocks @@ -1269,7 +1269,7 @@ int ext4_get_block(struct inode *inode, sector_t iblock, } ret = ext4_get_blocks(handle, inode, iblock, max_blocks, bh_result, - create, 0, 0); + create ? EXT4_GET_BLOCKS_CREATE : 0); if (ret > 0) { bh_result->b_size = (ret << inode->i_blkbits); ret = 0; @@ -1288,16 +1288,19 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode, { struct buffer_head dummy; int fatal = 0, err; + int flags = EXT4_GET_BLOCKS_EXTEND_DISKSIZE; J_ASSERT(handle != NULL || create == 0); dummy.b_state = 0; dummy.b_blocknr = -1000; buffer_trace_init(&dummy.b_history); - err = ext4_get_blocks(handle, inode, block, 1, &dummy, create, 1, 0); + if (create) + flags |= EXT4_GET_BLOCKS_CREATE; + err = ext4_get_blocks(handle, inode, block, 1, &dummy, flags); /* - * ext4_get_blocks() returns number of blocks - * mapped. 0 in case of a HOLE. + * ext4_get_blocks() returns number of blocks mapped. 0 in + * case of a HOLE. */ if (err > 0) { if (err > 1) @@ -1997,7 +2000,6 @@ static void ext4_print_free_blocks(struct inode *inode) return; } -#define EXT4_DELALLOC_RSVED 1 static int ext4_da_get_block_write(struct inode *inode, sector_t iblock, struct buffer_head *bh_result) { @@ -2009,7 +2011,8 @@ static int ext4_da_get_block_write(struct inode *inode, sector_t iblock, handle = ext4_journal_current_handle(); BUG_ON(!handle); ret = ext4_get_blocks(handle, inode, iblock, max_blocks, - bh_result, 1, 0, EXT4_DELALLOC_RSVED); + bh_result, EXT4_GET_BLOCKS_CREATE| + EXT4_GET_BLOCKS_DELALLOC_RESERVE); if (ret <= 0) return ret; @@ -2065,16 +2068,17 @@ static int mpage_da_map_blocks(struct mpage_da_data *mpd) return 0; /* * We need to make sure the BH_Delay flag is passed down to - * ext4_da_get_block_write(), since it calls - * ext4_get_blocks() with the EXT4_DELALLOC_RSVED flag. - * This flag causes ext4_get_blocks() to call + * ext4_da_get_block_write(), since it calls ext4_get_blocks() + * with the EXT4_GET_BLOCKS_DELALLOC_RESERVE flag. This flag + * causes ext4_get_blocks() to call * ext4_da_update_reserve_space() if the passed buffer head * has the BH_Delay flag set. In the future, once we clean up - * the interfaces to ext4_get_blocks(), we should pass in - * a separate flag which requests that the delayed allocation + * the interfaces to ext4_get_blocks(), we should pass in a + * separate flag which requests that the delayed allocation * statistics should be updated, instead of depending on the * state information getting passed down via the map_bh's - * state bitmasks plus the magic EXT4_DELALLOC_RSVED flag. + * state bitmasks plus the magic + * EXT4_GET_BLOCKS_DELALLOC_RESERVE flag. */ new.b_state = mpd->b_state & (1 << BH_Delay); new.b_blocknr = 0; @@ -2362,7 +2366,7 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, * preallocated blocks are unmapped but should treated * the same as allocated blocks. */ - ret = ext4_get_blocks(NULL, inode, iblock, 1, bh_result, 0, 0, 0); + ret = ext4_get_blocks(NULL, inode, iblock, 1, bh_result, 0); if ((ret == 0) && !buffer_delay(bh_result)) { /* the block isn't (pre)allocated yet, let's reserve space */ /* @@ -2406,8 +2410,7 @@ static int ext4_normal_get_block_write(struct inode *inode, sector_t iblock, * we don't want to do block allocation in writepage * so call get_block_wrap with create = 0 */ - ret = ext4_get_blocks(NULL, inode, iblock, max_blocks, - bh_result, 0, 0, 0); + ret = ext4_get_blocks(NULL, inode, iblock, max_blocks, bh_result, 0); if (ret > 0) { bh_result->b_size = (ret << inode->i_blkbits); ret = 0; |
