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Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap.h')
-rw-r--r--fs/xfs/libxfs/xfs_bmap.h67
1 files changed, 61 insertions, 6 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h
index 8395f6e..f97db71 100644
--- a/fs/xfs/libxfs/xfs_bmap.h
+++ b/fs/xfs/libxfs/xfs_bmap.h
@@ -97,6 +97,19 @@ struct xfs_extent_free_item
*/
#define XFS_BMAPI_ZERO 0x080
+/*
+ * 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
+
+/* Map something in the CoW fork. */
+#define XFS_BMAPI_COWFORK 0x200
+
#define XFS_BMAPI_FLAGS \
{ XFS_BMAPI_ENTIRE, "ENTIRE" }, \
{ XFS_BMAPI_METADATA, "METADATA" }, \
@@ -105,12 +118,24 @@ struct xfs_extent_free_item
{ XFS_BMAPI_IGSTATE, "IGSTATE" }, \
{ XFS_BMAPI_CONTIG, "CONTIG" }, \
{ XFS_BMAPI_CONVERT, "CONVERT" }, \
- { XFS_BMAPI_ZERO, "ZERO" }
+ { XFS_BMAPI_ZERO, "ZERO" }, \
+ { XFS_BMAPI_REMAP, "REMAP" }, \
+ { XFS_BMAPI_COWFORK, "COWFORK" }
static inline int xfs_bmapi_aflag(int w)
{
- return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : 0);
+ return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK :
+ (w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0));
+}
+
+static inline int xfs_bmapi_whichfork(int bmapi_flags)
+{
+ if (bmapi_flags & XFS_BMAPI_COWFORK)
+ return XFS_COW_FORK;
+ else if (bmapi_flags & XFS_BMAPI_ATTRFORK)
+ return XFS_ATTR_FORK;
+ return XFS_DATA_FORK;
}
/*
@@ -131,13 +156,15 @@ static inline int xfs_bmapi_aflag(int w)
#define BMAP_LEFT_VALID (1 << 6)
#define BMAP_RIGHT_VALID (1 << 7)
#define BMAP_ATTRFORK (1 << 8)
+#define BMAP_COWFORK (1 << 9)
#define XFS_BMAP_EXT_FLAGS \
{ BMAP_LEFT_CONTIG, "LC" }, \
{ BMAP_RIGHT_CONTIG, "RC" }, \
{ BMAP_LEFT_FILLING, "LF" }, \
{ BMAP_RIGHT_FILLING, "RF" }, \
- { BMAP_ATTRFORK, "ATTR" }
+ { BMAP_ATTRFORK, "ATTR" }, \
+ { BMAP_COWFORK, "COW" }
/*
@@ -186,10 +213,15 @@ int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip,
xfs_fsblock_t *firstblock, xfs_extlen_t total,
struct xfs_bmbt_irec *mval, int *nmap,
struct xfs_defer_ops *dfops);
+int __xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
+ xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags,
+ xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
+ struct xfs_defer_ops *dfops);
int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
xfs_fileoff_t bno, xfs_filblks_t len, int flags,
xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
struct xfs_defer_ops *dfops, int *done);
+int xfs_bunmapi_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *del);
int xfs_check_nostate_extents(struct xfs_ifork *ifp, xfs_extnum_t idx,
xfs_extnum_t num);
uint xfs_default_attroffset(struct xfs_inode *ip);
@@ -203,8 +235,31 @@ struct xfs_bmbt_rec_host *
xfs_bmap_search_extents(struct xfs_inode *ip, xfs_fileoff_t bno,
int fork, int *eofp, xfs_extnum_t *lastxp,
struct xfs_bmbt_irec *gotp, struct xfs_bmbt_irec *prevp);
-int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, xfs_fileoff_t aoff,
- xfs_filblks_t len, struct xfs_bmbt_irec *got,
- struct xfs_bmbt_irec *prev, xfs_extnum_t *lastx, int eof);
+int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
+ xfs_fileoff_t aoff, xfs_filblks_t len,
+ struct xfs_bmbt_irec *got, struct xfs_bmbt_irec *prev,
+ xfs_extnum_t *lastx, int eof);
+
+enum xfs_bmap_intent_type {
+ XFS_BMAP_MAP = 1,
+ XFS_BMAP_UNMAP,
+};
+
+struct xfs_bmap_intent {
+ struct list_head bi_list;
+ enum xfs_bmap_intent_type bi_type;
+ struct xfs_inode *bi_owner;
+ int bi_whichfork;
+ struct xfs_bmbt_irec bi_bmap;
+};
+
+int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_defer_ops *dfops,
+ struct xfs_inode *ip, enum xfs_bmap_intent_type type,
+ int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
+ xfs_filblks_t blockcount, xfs_exntst_t state);
+int xfs_bmap_map_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
+ struct xfs_inode *ip, struct xfs_bmbt_irec *imap);
+int xfs_bmap_unmap_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
+ struct xfs_inode *ip, struct xfs_bmbt_irec *imap);
#endif /* __XFS_BMAP_H__ */