diff options
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/balloc.c | 127 | ||||
| -rw-r--r-- | fs/ext4/ext4.h | 2 | ||||
| -rw-r--r-- | fs/ext4/extents.c | 10 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 2 | ||||
| -rw-r--r-- | fs/ext4/mballoc.c | 2 |
5 files changed, 84 insertions, 59 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index 816f1db..48787e8 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -1640,20 +1640,24 @@ int ext4_should_retry_alloc(struct super_block *sb, int *retries) } /** - * ext4_new_blocks_old() -- core block(s) allocation function + * ext4_old_new_blocks() -- core block bitmap based block allocation function + * * @handle: handle to this transaction * @inode: file inode * @goal: given target block(filesystem wide) * @count: target number of blocks to allocate * @errp: error code * - * ext4_new_blocks uses a goal block to assist allocation. It tries to - * allocate block(s) from the block group contains the goal block first. If that - * fails, it will try to allocate block(s) from other block groups without - * any specific goal block. + * ext4_old_new_blocks uses a goal block to assist allocation and look up + * the block bitmap directly to do block allocation. It tries to + * allocate block(s) from the block group contains the goal block first. If + * that fails, it will try to allocate block(s) from other block groups + * without any specific goal block. + * + * This function is called when -o nomballoc mount option is enabled * */ -ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode, +ext4_fsblk_t ext4_old_new_blocks(handle_t *handle, struct inode *inode, ext4_fsblk_t goal, unsigned long *count, int *errp) { struct buffer_head *bitmap_bh = NULL; @@ -1923,78 +1927,95 @@ out: return 0; } -ext4_fsblk_t ext4_new_meta_block(handle_t *handle, struct inode *inode, - ext4_fsblk_t goal, int *errp) -{ - struct ext4_allocation_request ar; - ext4_fsblk_t ret; - - if (!test_opt(inode->i_sb, MBALLOC)) { - unsigned long count = 1; - ret = ext4_new_blocks_old(handle, inode, goal, &count, errp); - return ret; - } +#define EXT4_META_BLOCK 0x1 - memset(&ar, 0, sizeof(ar)); - ar.inode = inode; - ar.goal = goal; - ar.len = 1; - ret = ext4_mb_new_blocks(handle, &ar, errp); - return ret; -} -ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, - ext4_fsblk_t goal, unsigned long *count, int *errp) -{ - struct ext4_allocation_request ar; - ext4_fsblk_t ret; - - if (!test_opt(inode->i_sb, MBALLOC)) { - ret = ext4_new_blocks_old(handle, inode, goal, count, errp); - return ret; - } - - memset(&ar, 0, sizeof(ar)); - ar.inode = inode; - ar.goal = goal; - ar.len = *count; - ret = ext4_mb_new_blocks(handle, &ar, errp); - *count = ar.len; - return ret; -} - -ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode, +static ext4_fsblk_t do_blk_alloc(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, ext4_fsblk_t goal, - unsigned long *count, int *errp) + unsigned long *count, int *errp, int flags) { struct ext4_allocation_request ar; ext4_fsblk_t ret; if (!test_opt(inode->i_sb, MBALLOC)) { - ret = ext4_new_blocks_old(handle, inode, goal, count, errp); - return ret; + return ext4_old_new_blocks(handle, inode, goal, count, errp); } memset(&ar, 0, sizeof(ar)); /* Fill with neighbour allocated blocks */ - ar.lleft = 0; - ar.pleft = 0; - ar.lright = 0; - ar.pright = 0; ar.inode = inode; ar.goal = goal; ar.len = *count; ar.logical = iblock; - if (S_ISREG(inode->i_mode)) + + if (S_ISREG(inode->i_mode) && !(flags & EXT4_META_BLOCK)) + /* enable in-core preallocation for data block allocation */ ar.flags = EXT4_MB_HINT_DATA; else /* disable in-core preallocation for non-regular files */ ar.flags = 0; + ret = ext4_mb_new_blocks(handle, &ar, errp); *count = ar.len; return ret; } +/* + * ext4_new_meta_block() -- allocate block for meta data (indexing) blocks + * + * @handle: handle to this transaction + * @inode: file inode + * @goal: given target block(filesystem wide) + * @errp: error code + * + * Return allocated block number on success + */ +ext4_fsblk_t ext4_new_meta_block(handle_t *handle, struct inode *inode, + ext4_fsblk_t goal, int *errp) +{ + unsigned long count = 1; + return do_blk_alloc(handle, inode, 0, goal, + &count, errp, EXT4_META_BLOCK); +} + +/* + * ext4_new_meta_blocks() -- allocate block for meta data (indexing) blocks + * + * @handle: handle to this transaction + * @inode: file inode + * @goal: given target block(filesystem wide) + * @count: total number of blocks need + * @errp: error code + * + * Return 1st allocated block numberon success, *count stores total account + * error stores in errp pointer + */ +ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, + ext4_fsblk_t goal, unsigned long *count, int *errp) +{ + return do_blk_alloc(handle, inode, 0, goal, + count, errp, EXT4_META_BLOCK); +} + +/* + * ext4_new_blocks() -- allocate data blocks + * + * @handle: handle to this transaction + * @inode: file inode + * @goal: given target block(filesystem wide) + * @count: total number of blocks need + * @errp: error code + * + * Return 1st allocated block numberon success, *count stores total account + * error stores in errp pointer + */ + +ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode, + ext4_lblk_t iblock, ext4_fsblk_t goal, + unsigned long *count, int *errp) +{ + return do_blk_alloc(handle, inode, iblock, goal, count, errp, 0); +} /** * ext4_count_free_blocks() -- count filesystem free blocks diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index d44a7fb..e622ade 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -977,7 +977,7 @@ extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, extern ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, ext4_fsblk_t goal, unsigned long *count, int *errp); -extern ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode, +extern ext4_fsblk_t ext4_old_new_blocks(handle_t *handle, struct inode *inode, ext4_fsblk_t goal, unsigned long *count, int *errp); extern void ext4_free_blocks (handle_t *handle, struct inode *inode, ext4_fsblk_t block, unsigned long count, int metadata); diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index c729b35..555155d 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -179,8 +179,11 @@ static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode, return bg_start + colour + block; } +/* + * Allocation for a meta data block + */ static ext4_fsblk_t -ext4_ext_new_block(handle_t *handle, struct inode *inode, +ext4_ext_new_meta_block(handle_t *handle, struct inode *inode, struct ext4_ext_path *path, struct ext4_extent *ex, int *err) { @@ -690,7 +693,8 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode, /* allocate all needed blocks */ ext_debug("allocate %d blocks for indexes/leaf\n", depth - at); for (a = 0; a < depth - at; a++) { - newblock = ext4_ext_new_block(handle, inode, path, newext, &err); + newblock = ext4_ext_new_meta_block(handle, inode, path, + newext, &err); if (newblock == 0) goto cleanup; ablocks[a] = newblock; @@ -886,7 +890,7 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode, ext4_fsblk_t newblock; int err = 0; - newblock = ext4_ext_new_block(handle, inode, path, newext, &err); + newblock = ext4_ext_new_meta_block(handle, inode, path, newext, &err); if (newblock == 0) return err; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index bc95056..c5d506d 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -561,7 +561,7 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode, goto allocated; /* Now allocate data blocks */ count = target; - /* allocating blocks for indirect blocks and direct blocks */ + /* allocating blocks for data blocks */ current_block = ext4_new_blocks(handle, inode, iblock, goal, &count, err); if (*err && (target == blks)) { diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index cde232b..816ba8c 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4041,7 +4041,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, sbi = EXT4_SB(sb); if (!test_opt(sb, MBALLOC)) { - block = ext4_new_blocks_old(handle, ar->inode, ar->goal, + block = ext4_old_new_blocks(handle, ar->inode, ar->goal, &(ar->len), errp); return block; } |
