diff options
Diffstat (limited to 'fs/ext4/mballoc.c')
| -rw-r--r-- | fs/ext4/mballoc.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 6e5a23a2cc2..0dca90be1af 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4427,18 +4427,24 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b, return 0; } -/* - * Main entry point into mballoc to free blocks +/** + * ext4_free_blocks() -- Free given blocks and update quota + * @handle: handle for this transaction + * @inode: inode + * @block: start physical block to free + * @count: number of blocks to count + * @metadata: Are these metadata blocks */ -void ext4_mb_free_blocks(handle_t *handle, struct inode *inode, - ext4_fsblk_t block, unsigned long count, - int metadata, unsigned long *freed) +void ext4_free_blocks(handle_t *handle, struct inode *inode, + ext4_fsblk_t block, unsigned long count, + int metadata) { struct buffer_head *bitmap_bh = NULL; struct super_block *sb = inode->i_sb; struct ext4_allocation_context *ac = NULL; struct ext4_group_desc *gdp; struct ext4_super_block *es; + unsigned long freed = 0; unsigned int overflow; ext4_grpblk_t bit; struct buffer_head *gd_bh; @@ -4448,7 +4454,15 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode, int err = 0; int ret; - *freed = 0; + /* + * 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; sbi = EXT4_SB(sb); es = EXT4_SB(sb)->s_es; @@ -4577,7 +4591,7 @@ do_more: ext4_mb_release_desc(&e4b); - *freed += count; + freed += count; /* We dirtied the bitmap block */ BUFFER_TRACE(bitmap_bh, "dirtied bitmap block"); @@ -4597,6 +4611,8 @@ do_more: } sb->s_dirt = 1; error_return: + if (freed) + vfs_dq_free_block(inode, freed); brelse(bitmap_bh); ext4_std_error(sb, err); if (ac) |