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xfs: add bmapi nodiscard flag

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Freed extents are unconditionally discarded when online discard is
enabled. Define XFS_BMAPI_NODISCARD to allow callers to bypass
discards when unnecessary. For example, this will be useful for
eofblocks trimming.

This patch does not change behavior.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Brian Foster
2018-05-09 08:45:04 -07:00
committed by Darrick J. Wong
parent e6631f8554
commit fcb762f5de
7 changed files with 87 additions and 18 deletions
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33
fs/xfs/libxfs/xfs_bmap.h
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@@ -68,6 +68,7 @@ struct xfs_extent_free_item
xfs_extlen_t xefi_blockcount;/* number of blocks in extent */
struct list_head xefi_list;
struct xfs_owner_info xefi_oinfo; /* extent owner */
bool xefi_skip_discard;
};
#define XFS_BMAP_MAX_NMAP 4
@@ -116,6 +117,9 @@ struct xfs_extent_free_item
/* Only convert unwritten extents, don't allocate new blocks */
#define XFS_BMAPI_CONVERT_ONLY 0x800
/* Skip online discard of freed extents */
#define XFS_BMAPI_NODISCARD 0x1000
#define XFS_BMAPI_FLAGS \
{ XFS_BMAPI_ENTIRE, "ENTIRE" }, \
{ XFS_BMAPI_METADATA, "METADATA" }, \
@@ -128,7 +132,8 @@ struct xfs_extent_free_item
{ XFS_BMAPI_REMAP, "REMAP" }, \
{ XFS_BMAPI_COWFORK, "COWFORK" }, \
{ XFS_BMAPI_DELALLOC, "DELALLOC" }, \
{ XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }
{ XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }, \
{ XFS_BMAPI_NODISCARD, "NODISCARD" }
static inline int xfs_bmapi_aflag(int w)
@@ -192,9 +197,9 @@ void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
void xfs_trim_extent_eof(struct xfs_bmbt_irec *, struct xfs_inode *);
int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
void xfs_bmap_add_free(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
void __xfs_bmap_add_free(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
xfs_fsblock_t bno, xfs_filblks_t len,
struct xfs_owner_info *oinfo);
struct xfs_owner_info *oinfo, bool skip_discard);
void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip,
xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
@@ -240,6 +245,28 @@ int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur,
int eof);
static inline void
xfs_bmap_add_free(
struct xfs_mount *mp,
struct xfs_defer_ops *dfops,
xfs_fsblock_t bno,
xfs_filblks_t len,
struct xfs_owner_info *oinfo)
{
__xfs_bmap_add_free(mp, dfops, bno, len, oinfo, false);
}
static inline void
xfs_bmap_add_free_nodiscard(
struct xfs_mount *mp,
struct xfs_defer_ops *dfops,
xfs_fsblock_t bno,
xfs_filblks_t len,
struct xfs_owner_info *oinfo)
{
__xfs_bmap_add_free(mp, dfops, bno, len, oinfo, true);
}
enum xfs_bmap_intent_type {
XFS_BMAP_MAP = 1,
XFS_BMAP_UNMAP,