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-rw-r--r--fs/xfs/libxfs/xfs_rmap.h220
1 files changed, 220 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_rmap.h b/fs/xfs/libxfs/xfs_rmap.h
new file mode 100644
index 000000000..54741a591
--- /dev/null
+++ b/fs/xfs/libxfs/xfs_rmap.h
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Oracle. All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#ifndef __XFS_RMAP_H__
+#define __XFS_RMAP_H__
+
+struct xfs_perag;
+
+static inline void
+xfs_rmap_ino_bmbt_owner(
+ struct xfs_owner_info *oi,
+ xfs_ino_t ino,
+ int whichfork)
+{
+ oi->oi_owner = ino;
+ oi->oi_offset = 0;
+ oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK;
+ if (whichfork == XFS_ATTR_FORK)
+ oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
+}
+
+static inline void
+xfs_rmap_ino_owner(
+ struct xfs_owner_info *oi,
+ xfs_ino_t ino,
+ int whichfork,
+ xfs_fileoff_t offset)
+{
+ oi->oi_owner = ino;
+ oi->oi_offset = offset;
+ oi->oi_flags = 0;
+ if (whichfork == XFS_ATTR_FORK)
+ oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
+}
+
+static inline bool
+xfs_rmap_should_skip_owner_update(
+ const struct xfs_owner_info *oi)
+{
+ return oi->oi_owner == XFS_RMAP_OWN_NULL;
+}
+
+/* Reverse mapping functions. */
+
+struct xfs_buf;
+
+static inline __u64
+xfs_rmap_irec_offset_pack(
+ const struct xfs_rmap_irec *irec)
+{
+ __u64 x;
+
+ x = XFS_RMAP_OFF(irec->rm_offset);
+ if (irec->rm_flags & XFS_RMAP_ATTR_FORK)
+ x |= XFS_RMAP_OFF_ATTR_FORK;
+ if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK)
+ x |= XFS_RMAP_OFF_BMBT_BLOCK;
+ if (irec->rm_flags & XFS_RMAP_UNWRITTEN)
+ x |= XFS_RMAP_OFF_UNWRITTEN;
+ return x;
+}
+
+static inline int
+xfs_rmap_irec_offset_unpack(
+ __u64 offset,
+ struct xfs_rmap_irec *irec)
+{
+ if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS))
+ return -EFSCORRUPTED;
+ irec->rm_offset = XFS_RMAP_OFF(offset);
+ irec->rm_flags = 0;
+ if (offset & XFS_RMAP_OFF_ATTR_FORK)
+ irec->rm_flags |= XFS_RMAP_ATTR_FORK;
+ if (offset & XFS_RMAP_OFF_BMBT_BLOCK)
+ irec->rm_flags |= XFS_RMAP_BMBT_BLOCK;
+ if (offset & XFS_RMAP_OFF_UNWRITTEN)
+ irec->rm_flags |= XFS_RMAP_UNWRITTEN;
+ return 0;
+}
+
+static inline void
+xfs_owner_info_unpack(
+ const struct xfs_owner_info *oinfo,
+ uint64_t *owner,
+ uint64_t *offset,
+ unsigned int *flags)
+{
+ unsigned int r = 0;
+
+ *owner = oinfo->oi_owner;
+ *offset = oinfo->oi_offset;
+ if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK)
+ r |= XFS_RMAP_ATTR_FORK;
+ if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK)
+ r |= XFS_RMAP_BMBT_BLOCK;
+ *flags = r;
+}
+
+static inline void
+xfs_owner_info_pack(
+ struct xfs_owner_info *oinfo,
+ uint64_t owner,
+ uint64_t offset,
+ unsigned int flags)
+{
+ oinfo->oi_owner = owner;
+ oinfo->oi_offset = XFS_RMAP_OFF(offset);
+ oinfo->oi_flags = 0;
+ if (flags & XFS_RMAP_ATTR_FORK)
+ oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
+ if (flags & XFS_RMAP_BMBT_BLOCK)
+ oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK;
+}
+
+int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp,
+ struct xfs_perag *pag, xfs_agblock_t bno, xfs_extlen_t len,
+ const struct xfs_owner_info *oinfo);
+int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp,
+ struct xfs_perag *pag, xfs_agblock_t bno, xfs_extlen_t len,
+ const struct xfs_owner_info *oinfo);
+
+int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno,
+ uint64_t owner, uint64_t offset, unsigned int flags,
+ struct xfs_rmap_irec *irec, int *stat);
+int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno,
+ xfs_extlen_t len, uint64_t owner, uint64_t offset,
+ unsigned int flags, int *stat);
+int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno,
+ xfs_extlen_t len, uint64_t owner, uint64_t offset,
+ unsigned int flags);
+int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec,
+ int *stat);
+
+typedef int (*xfs_rmap_query_range_fn)(
+ struct xfs_btree_cur *cur,
+ const struct xfs_rmap_irec *rec,
+ void *priv);
+
+int xfs_rmap_query_range(struct xfs_btree_cur *cur,
+ const struct xfs_rmap_irec *low_rec,
+ const struct xfs_rmap_irec *high_rec,
+ xfs_rmap_query_range_fn fn, void *priv);
+int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn,
+ void *priv);
+
+enum xfs_rmap_intent_type {
+ XFS_RMAP_MAP,
+ XFS_RMAP_MAP_SHARED,
+ XFS_RMAP_UNMAP,
+ XFS_RMAP_UNMAP_SHARED,
+ XFS_RMAP_CONVERT,
+ XFS_RMAP_CONVERT_SHARED,
+ XFS_RMAP_ALLOC,
+ XFS_RMAP_FREE,
+};
+
+struct xfs_rmap_intent {
+ struct list_head ri_list;
+ enum xfs_rmap_intent_type ri_type;
+ int ri_whichfork;
+ uint64_t ri_owner;
+ struct xfs_bmbt_irec ri_bmap;
+};
+
+/* functions for updating the rmapbt based on bmbt map/unmap operations */
+void xfs_rmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip,
+ int whichfork, struct xfs_bmbt_irec *imap);
+void xfs_rmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip,
+ int whichfork, struct xfs_bmbt_irec *imap);
+void xfs_rmap_convert_extent(struct xfs_mount *mp, struct xfs_trans *tp,
+ struct xfs_inode *ip, int whichfork,
+ struct xfs_bmbt_irec *imap);
+void xfs_rmap_alloc_extent(struct xfs_trans *tp, xfs_agnumber_t agno,
+ xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner);
+void xfs_rmap_free_extent(struct xfs_trans *tp, xfs_agnumber_t agno,
+ xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner);
+
+void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp,
+ struct xfs_btree_cur *rcur, int error);
+int xfs_rmap_finish_one(struct xfs_trans *tp, enum xfs_rmap_intent_type type,
+ uint64_t owner, int whichfork, xfs_fileoff_t startoff,
+ xfs_fsblock_t startblock, xfs_filblks_t blockcount,
+ xfs_exntst_t state, struct xfs_btree_cur **pcur);
+
+int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno,
+ uint64_t owner, uint64_t offset, unsigned int flags,
+ struct xfs_rmap_irec *irec, int *stat);
+int xfs_rmap_compare(const struct xfs_rmap_irec *a,
+ const struct xfs_rmap_irec *b);
+union xfs_btree_rec;
+int xfs_rmap_btrec_to_irec(const union xfs_btree_rec *rec,
+ struct xfs_rmap_irec *irec);
+int xfs_rmap_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno,
+ xfs_extlen_t len, bool *exists);
+int xfs_rmap_record_exists(struct xfs_btree_cur *cur, xfs_agblock_t bno,
+ xfs_extlen_t len, const struct xfs_owner_info *oinfo,
+ bool *has_rmap);
+int xfs_rmap_has_other_keys(struct xfs_btree_cur *cur, xfs_agblock_t bno,
+ xfs_extlen_t len, const struct xfs_owner_info *oinfo,
+ bool *has_rmap);
+int xfs_rmap_map_raw(struct xfs_btree_cur *cur, struct xfs_rmap_irec *rmap);
+
+extern const struct xfs_owner_info XFS_RMAP_OINFO_SKIP_UPDATE;
+extern const struct xfs_owner_info XFS_RMAP_OINFO_ANY_OWNER;
+extern const struct xfs_owner_info XFS_RMAP_OINFO_FS;
+extern const struct xfs_owner_info XFS_RMAP_OINFO_LOG;
+extern const struct xfs_owner_info XFS_RMAP_OINFO_AG;
+extern const struct xfs_owner_info XFS_RMAP_OINFO_INOBT;
+extern const struct xfs_owner_info XFS_RMAP_OINFO_INODES;
+extern const struct xfs_owner_info XFS_RMAP_OINFO_REFC;
+extern const struct xfs_owner_info XFS_RMAP_OINFO_COW;
+
+extern struct kmem_cache *xfs_rmap_intent_cache;
+
+int __init xfs_rmap_intent_init_cache(void);
+void xfs_rmap_intent_destroy_cache(void);
+
+#endif /* __XFS_RMAP_H__ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-06 15:05:02 +0000