Pass BMAPI_ flags from bunmapi into bmap_del_extent and extend
BMAPI_REMAP (which means "don't touch the allocator or the quota
accounting") to apply to bunmapi as well. This will be used to
implement the unmap operation, which will be used by swapext.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_bmap.c | 9 +++++----
fs/xfs/libxfs/xfs_bmap.h | 3 +++
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 7f525b9..2aa7eb6 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -4834,7 +4834,8 @@ xfs_bmap_del_extent(
xfs_btree_cur_t *cur, /* if null, not a btree */
xfs_bmbt_irec_t *del, /* data to remove from extents */
int *logflagsp, /* inode logging flags */
- int whichfork) /* data or attr fork */
+ int whichfork, /* data or attr fork */
+ int bflags) /* bmapi flags */
{
xfs_filblks_t da_new; /* new delay-alloc indirect blocks */
xfs_filblks_t da_old; /* old delay-alloc indirect blocks */
@@ -5126,7 +5127,7 @@ xfs_bmap_del_extent(
/*
* If we need to, add to list of extents to delete.
*/
- if (do_fx) {
+ if (do_fx && !(bflags & XFS_BMAPI_REMAP)) {
if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) {
error = xfs_refcount_decrease_extent(mp, dfops, del);
if (error)
@@ -5144,7 +5145,7 @@ xfs_bmap_del_extent(
/*
* Adjust quota data.
*/
- if (qfield)
+ if (qfield && !(bflags & XFS_BMAPI_REMAP))
xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks);
/*
@@ -5469,7 +5470,7 @@ xfs_bunmapi(
cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL;
error = xfs_bmap_del_extent(ip, tp, &lastx, dfops, cur, &del,
- &tmp_logflags, whichfork);
+ &tmp_logflags, whichfork, flags);
logflags |= tmp_logflags;
if (error)
goto error0;
diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h
index 76b19ba..1a5d5f4 100644
--- a/fs/xfs/libxfs/xfs_bmap.h
+++ b/fs/xfs/libxfs/xfs_bmap.h
@@ -101,6 +101,9 @@ struct xfs_extent_free_item
* Map the inode offset to the block given in ap->firstblock. Primarily
* used for reflink. The range must be in a hole, and this flag cannot be
* turned on with PREALLOC or CONVERT, and cannot be used on the attr fork.
+ *
+ * For bunmapi, this flag unmaps the range without adjusting quota, reducing
+ * refcount, or freeing the blocks.
*/
#define XFS_BMAPI_REMAP 0x100
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