btrfs: ignore unfragmented file checks in defrag when compression enabled - rebased
Rebased on btrfs-next and retested.
Inform should_defrag_range if BTRFS_DEFRAG_RANGE_COMPRESS is set. If so, skip
checks for adjacent extents and extent size when deciding whether to defrag,
as these can prevent an uncompressed and unfragmented file from being
compressed as requested.
Signed-off-by: Andrew Mahone <andrew.mahone@gmail.com>
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 0e92e57..9ec23b9 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -832,7 +832,8 @@
}
static int should_defrag_range(struct inode *inode, u64 start, int thresh,
- u64 *last_len, u64 *skip, u64 *defrag_end)
+ u64 *last_len, u64 *skip, u64 *defrag_end,
+ int compress)
{
struct extent_map *em;
int ret = 1;
@@ -863,7 +864,7 @@
* we hit a real extent, if it is big or the next extent is not a
* real extent, don't bother defragging it
*/
- if ((*last_len == 0 || *last_len >= thresh) &&
+ if (!compress && (*last_len == 0 || *last_len >= thresh) &&
(em->len >= thresh || !next_mergeable))
ret = 0;
out:
@@ -1145,7 +1146,8 @@
if (!should_defrag_range(inode, (u64)i << PAGE_CACHE_SHIFT,
extent_thresh, &last_len, &skip,
- &defrag_end)) {
+ &defrag_end, range->flags &
+ BTRFS_DEFRAG_RANGE_COMPRESS)) {
unsigned long next;
/*
* the should_defrag function tells us how much to skip