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xfs: pass bmapi flags through to bmap_del_extent 

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@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2016-10-03 09:11:27 -07:00
parent f65306ea52
commit 4847acf868
2 changed files with 8 additions and 4 deletions
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9
fs/xfs/libxfs/xfs_bmap.c
View File

@ -4765,7 +4765,8 @@ 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 */
@ -5057,7 +5058,7 @@ 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)
@ -5075,7 +5076,7 @@ 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);
/*
@ -5400,7 +5401,7 @@ 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;

3
fs/xfs/libxfs/xfs_bmap.h
View File

@ -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