diff options
| author | Omar Sandoval <osandov@fb.com> | 2017-01-17 23:37:38 -0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-02-14 15:50:58 +0100 |
| commit | fc4badd9fe6aab008b85024f0e6af9b58cca283c (patch) | |
| tree | 57d81e2c511dde2b48d87fc3eda5e4397a6743b2 /fs/btrfs/ioctl.c | |
| parent | 310712b2f73ac1da4c3a99fd9886e8b652727508 (diff) | |
Btrfs: refactor btrfs_extent_same() slightly
This was originally a prep patch for changing the behavior on len=0, but
we went another direction with that. This still makes the function
slightly easier to follow.
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ioctl.c')
| -rw-r--r-- | fs/btrfs/ioctl.c | 33 |
1 files changed, 12 insertions, 21 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 529cc273e817..77f93a1e65c7 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3125,26 +3125,27 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen, int ret; u64 len = olen; struct cmp_pages cmp; - int same_inode = 0; + bool same_inode = (src == dst); u64 same_lock_start = 0; u64 same_lock_len = 0; - if (src == dst) - same_inode = 1; - if (len == 0) return 0; - if (same_inode) { + if (same_inode) inode_lock(src); + else + btrfs_double_inode_lock(src, dst); - ret = extent_same_check_offsets(src, loff, &len, olen); - if (ret) - goto out_unlock; - ret = extent_same_check_offsets(src, dst_loff, &len, olen); - if (ret) - goto out_unlock; + ret = extent_same_check_offsets(src, loff, &len, olen); + if (ret) + goto out_unlock; + ret = extent_same_check_offsets(dst, dst_loff, &len, olen); + if (ret) + goto out_unlock; + + if (same_inode) { /* * Single inode case wants the same checks, except we * don't want our length pushed out past i_size as @@ -3172,16 +3173,6 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen, same_lock_start = min_t(u64, loff, dst_loff); same_lock_len = max_t(u64, loff, dst_loff) + len - same_lock_start; - } else { - btrfs_double_inode_lock(src, dst); - - ret = extent_same_check_offsets(src, loff, &len, olen); - if (ret) - goto out_unlock; - - ret = extent_same_check_offsets(dst, dst_loff, &len, olen); - if (ret) - goto out_unlock; } /* don't make the dst file partly checksummed */ |