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6#ifndef __XFS_RMAP_H__
7#define __XFS_RMAP_H__
8
9static inline void
10xfs_rmap_ino_bmbt_owner(
11 struct xfs_owner_info *oi,
12 xfs_ino_t ino,
13 int whichfork)
14{
15 oi->oi_owner = ino;
16 oi->oi_offset = 0;
17 oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK;
18 if (whichfork == XFS_ATTR_FORK)
19 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
20}
21
22static inline void
23xfs_rmap_ino_owner(
24 struct xfs_owner_info *oi,
25 xfs_ino_t ino,
26 int whichfork,
27 xfs_fileoff_t offset)
28{
29 oi->oi_owner = ino;
30 oi->oi_offset = offset;
31 oi->oi_flags = 0;
32 if (whichfork == XFS_ATTR_FORK)
33 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
34}
35
36static inline bool
37xfs_rmap_should_skip_owner_update(
38 const struct xfs_owner_info *oi)
39{
40 return oi->oi_owner == XFS_RMAP_OWN_NULL;
41}
42
43
44
45struct xfs_buf;
46
47static inline __u64
48xfs_rmap_irec_offset_pack(
49 const struct xfs_rmap_irec *irec)
50{
51 __u64 x;
52
53 x = XFS_RMAP_OFF(irec->rm_offset);
54 if (irec->rm_flags & XFS_RMAP_ATTR_FORK)
55 x |= XFS_RMAP_OFF_ATTR_FORK;
56 if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK)
57 x |= XFS_RMAP_OFF_BMBT_BLOCK;
58 if (irec->rm_flags & XFS_RMAP_UNWRITTEN)
59 x |= XFS_RMAP_OFF_UNWRITTEN;
60 return x;
61}
62
63static inline int
64xfs_rmap_irec_offset_unpack(
65 __u64 offset,
66 struct xfs_rmap_irec *irec)
67{
68 if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS))
69 return -EFSCORRUPTED;
70 irec->rm_offset = XFS_RMAP_OFF(offset);
71 irec->rm_flags = 0;
72 if (offset & XFS_RMAP_OFF_ATTR_FORK)
73 irec->rm_flags |= XFS_RMAP_ATTR_FORK;
74 if (offset & XFS_RMAP_OFF_BMBT_BLOCK)
75 irec->rm_flags |= XFS_RMAP_BMBT_BLOCK;
76 if (offset & XFS_RMAP_OFF_UNWRITTEN)
77 irec->rm_flags |= XFS_RMAP_UNWRITTEN;
78 return 0;
79}
80
81static inline void
82xfs_owner_info_unpack(
83 const struct xfs_owner_info *oinfo,
84 uint64_t *owner,
85 uint64_t *offset,
86 unsigned int *flags)
87{
88 unsigned int r = 0;
89
90 *owner = oinfo->oi_owner;
91 *offset = oinfo->oi_offset;
92 if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK)
93 r |= XFS_RMAP_ATTR_FORK;
94 if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK)
95 r |= XFS_RMAP_BMBT_BLOCK;
96 *flags = r;
97}
98
99static inline void
100xfs_owner_info_pack(
101 struct xfs_owner_info *oinfo,
102 uint64_t owner,
103 uint64_t offset,
104 unsigned int flags)
105{
106 oinfo->oi_owner = owner;
107 oinfo->oi_offset = XFS_RMAP_OFF(offset);
108 oinfo->oi_flags = 0;
109 if (flags & XFS_RMAP_ATTR_FORK)
110 oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
111 if (flags & XFS_RMAP_BMBT_BLOCK)
112 oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK;
113}
114
115int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp,
116 xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
117 const struct xfs_owner_info *oinfo);
118int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp,
119 xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
120 const struct xfs_owner_info *oinfo);
121
122int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno,
123 xfs_extlen_t len, uint64_t owner, uint64_t offset,
124 unsigned int flags, int *stat);
125int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno,
126 xfs_extlen_t len, uint64_t owner, uint64_t offset,
127 unsigned int flags, int *stat);
128int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno,
129 xfs_extlen_t len, uint64_t owner, uint64_t offset,
130 unsigned int flags);
131int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec,
132 int *stat);
133
134typedef int (*xfs_rmap_query_range_fn)(
135 struct xfs_btree_cur *cur,
136 struct xfs_rmap_irec *rec,
137 void *priv);
138
139int xfs_rmap_query_range(struct xfs_btree_cur *cur,
140 struct xfs_rmap_irec *low_rec, struct xfs_rmap_irec *high_rec,
141 xfs_rmap_query_range_fn fn, void *priv);
142int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn,
143 void *priv);
144
145enum xfs_rmap_intent_type {
146 XFS_RMAP_MAP,
147 XFS_RMAP_MAP_SHARED,
148 XFS_RMAP_UNMAP,
149 XFS_RMAP_UNMAP_SHARED,
150 XFS_RMAP_CONVERT,
151 XFS_RMAP_CONVERT_SHARED,
152 XFS_RMAP_ALLOC,
153 XFS_RMAP_FREE,
154};
155
156struct xfs_rmap_intent {
157 struct list_head ri_list;
158 enum xfs_rmap_intent_type ri_type;
159 uint64_t ri_owner;
160 int ri_whichfork;
161 struct xfs_bmbt_irec ri_bmap;
162};
163
164
165void xfs_rmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip,
166 int whichfork, struct xfs_bmbt_irec *imap);
167void xfs_rmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip,
168 int whichfork, struct xfs_bmbt_irec *imap);
169void xfs_rmap_convert_extent(struct xfs_mount *mp, struct xfs_trans *tp,
170 struct xfs_inode *ip, int whichfork,
171 struct xfs_bmbt_irec *imap);
172void xfs_rmap_alloc_extent(struct xfs_trans *tp, xfs_agnumber_t agno,
173 xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner);
174void xfs_rmap_free_extent(struct xfs_trans *tp, xfs_agnumber_t agno,
175 xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner);
176
177void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp,
178 struct xfs_btree_cur *rcur, int error);
179int xfs_rmap_finish_one(struct xfs_trans *tp, enum xfs_rmap_intent_type type,
180 uint64_t owner, int whichfork, xfs_fileoff_t startoff,
181 xfs_fsblock_t startblock, xfs_filblks_t blockcount,
182 xfs_exntst_t state, struct xfs_btree_cur **pcur);
183
184int xfs_rmap_find_left_neighbor(struct xfs_btree_cur *cur, xfs_agblock_t bno,
185 uint64_t owner, uint64_t offset, unsigned int flags,
186 struct xfs_rmap_irec *irec, int *stat);
187int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno,
188 uint64_t owner, uint64_t offset, unsigned int flags,
189 struct xfs_rmap_irec *irec, int *stat);
190int xfs_rmap_compare(const struct xfs_rmap_irec *a,
191 const struct xfs_rmap_irec *b);
192union xfs_btree_rec;
193int xfs_rmap_btrec_to_irec(union xfs_btree_rec *rec,
194 struct xfs_rmap_irec *irec);
195int xfs_rmap_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno,
196 xfs_extlen_t len, bool *exists);
197int xfs_rmap_record_exists(struct xfs_btree_cur *cur, xfs_agblock_t bno,
198 xfs_extlen_t len, const struct xfs_owner_info *oinfo,
199 bool *has_rmap);
200int xfs_rmap_has_other_keys(struct xfs_btree_cur *cur, xfs_agblock_t bno,
201 xfs_extlen_t len, const struct xfs_owner_info *oinfo,
202 bool *has_rmap);
203int xfs_rmap_map_raw(struct xfs_btree_cur *cur, struct xfs_rmap_irec *rmap);
204
205extern const struct xfs_owner_info XFS_RMAP_OINFO_SKIP_UPDATE;
206extern const struct xfs_owner_info XFS_RMAP_OINFO_ANY_OWNER;
207extern const struct xfs_owner_info XFS_RMAP_OINFO_FS;
208extern const struct xfs_owner_info XFS_RMAP_OINFO_LOG;
209extern const struct xfs_owner_info XFS_RMAP_OINFO_AG;
210extern const struct xfs_owner_info XFS_RMAP_OINFO_INOBT;
211extern const struct xfs_owner_info XFS_RMAP_OINFO_INODES;
212extern const struct xfs_owner_info XFS_RMAP_OINFO_REFC;
213extern const struct xfs_owner_info XFS_RMAP_OINFO_COW;
214
215#endif
216
