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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2016 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
5 */
6#ifndef __XFS_RMAP_H__
7#define __XFS_RMAP_H__
8
9struct xfs_perag;
10
11static inline void
12xfs_rmap_ino_bmbt_owner(
13 struct xfs_owner_info *oi,
14 xfs_ino_t ino,
15 int whichfork)
16{
17 oi->oi_owner = ino;
18 oi->oi_offset = 0;
19 oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK;
20 if (whichfork == XFS_ATTR_FORK)
21 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
22}
23
24static inline void
25xfs_rmap_ino_owner(
26 struct xfs_owner_info *oi,
27 xfs_ino_t ino,
28 int whichfork,
29 xfs_fileoff_t offset)
30{
31 oi->oi_owner = ino;
32 oi->oi_offset = offset;
33 oi->oi_flags = 0;
34 if (whichfork == XFS_ATTR_FORK)
35 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
36}
37
38static inline bool
39xfs_rmap_should_skip_owner_update(
40 const struct xfs_owner_info *oi)
41{
42 return oi->oi_owner == XFS_RMAP_OWN_NULL;
43}
44
45/* Reverse mapping functions. */
46
47struct xfs_buf;
48
49static inline __u64
50xfs_rmap_irec_offset_pack(
51 const struct xfs_rmap_irec *irec)
52{
53 __u64 x;
54
55 x = XFS_RMAP_OFF(irec->rm_offset);
56 if (irec->rm_flags & XFS_RMAP_ATTR_FORK)
57 x |= XFS_RMAP_OFF_ATTR_FORK;
58 if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK)
59 x |= XFS_RMAP_OFF_BMBT_BLOCK;
60 if (irec->rm_flags & XFS_RMAP_UNWRITTEN)
61 x |= XFS_RMAP_OFF_UNWRITTEN;
62 return x;
63}
64
65static inline xfs_failaddr_t
66xfs_rmap_irec_offset_unpack(
67 __u64 offset,
68 struct xfs_rmap_irec *irec)
69{
70 if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS))
71 return __this_address;
72
73 irec->rm_offset = XFS_RMAP_OFF(offset);
74 irec->rm_flags = 0;
75 if (offset & XFS_RMAP_OFF_ATTR_FORK)
76 irec->rm_flags |= XFS_RMAP_ATTR_FORK;
77 if (offset & XFS_RMAP_OFF_BMBT_BLOCK)
78 irec->rm_flags |= XFS_RMAP_BMBT_BLOCK;
79 if (offset & XFS_RMAP_OFF_UNWRITTEN)
80 irec->rm_flags |= XFS_RMAP_UNWRITTEN;
81 return NULL;
82}
83
84static inline void
85xfs_owner_info_unpack(
86 const struct xfs_owner_info *oinfo,
87 uint64_t *owner,
88 uint64_t *offset,
89 unsigned int *flags)
90{
91 unsigned int r = 0;
92
93 *owner = oinfo->oi_owner;
94 *offset = oinfo->oi_offset;
95 if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK)
96 r |= XFS_RMAP_ATTR_FORK;
97 if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK)
98 r |= XFS_RMAP_BMBT_BLOCK;
99 *flags = r;
100}
101
102static inline void
103xfs_owner_info_pack(
104 struct xfs_owner_info *oinfo,
105 uint64_t owner,
106 uint64_t offset,
107 unsigned int flags)
108{
109 oinfo->oi_owner = owner;
110 oinfo->oi_offset = XFS_RMAP_OFF(offset);
111 oinfo->oi_flags = 0;
112 if (flags & XFS_RMAP_ATTR_FORK)
113 oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
114 if (flags & XFS_RMAP_BMBT_BLOCK)
115 oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK;
116}
117
118int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp,
119 struct xfs_perag *pag, xfs_agblock_t bno, xfs_extlen_t len,
120 const struct xfs_owner_info *oinfo);
121int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp,
122 struct xfs_perag *pag, xfs_agblock_t bno, xfs_extlen_t len,
123 const struct xfs_owner_info *oinfo);
124
125int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno,
126 uint64_t owner, uint64_t offset, unsigned int flags,
127 struct xfs_rmap_irec *irec, int *stat);
128int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno,
129 xfs_extlen_t len, uint64_t owner, uint64_t offset,
130 unsigned int flags, int *stat);
131int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno,
132 xfs_extlen_t len, uint64_t owner, uint64_t offset,
133 unsigned int flags);
134int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec,
135 int *stat);
136
137typedef int (*xfs_rmap_query_range_fn)(
138 struct xfs_btree_cur *cur,
139 const struct xfs_rmap_irec *rec,
140 void *priv);
141
142int xfs_rmap_query_range(struct xfs_btree_cur *cur,
143 const struct xfs_rmap_irec *low_rec,
144 const struct xfs_rmap_irec *high_rec,
145 xfs_rmap_query_range_fn fn, void *priv);
146int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn,
147 void *priv);
148
149enum xfs_rmap_intent_type {
150 XFS_RMAP_MAP,
151 XFS_RMAP_MAP_SHARED,
152 XFS_RMAP_UNMAP,
153 XFS_RMAP_UNMAP_SHARED,
154 XFS_RMAP_CONVERT,
155 XFS_RMAP_CONVERT_SHARED,
156 XFS_RMAP_ALLOC,
157 XFS_RMAP_FREE,
158};
159
160struct xfs_rmap_intent {
161 struct list_head ri_list;
162 enum xfs_rmap_intent_type ri_type;
163 int ri_whichfork;
164 uint64_t ri_owner;
165 struct xfs_bmbt_irec ri_bmap;
166 struct xfs_perag *ri_pag;
167};
168
169void xfs_rmap_update_get_group(struct xfs_mount *mp,
170 struct xfs_rmap_intent *ri);
171
172/* functions for updating the rmapbt based on bmbt map/unmap operations */
173void xfs_rmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip,
174 int whichfork, struct xfs_bmbt_irec *imap);
175void xfs_rmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip,
176 int whichfork, struct xfs_bmbt_irec *imap);
177void xfs_rmap_convert_extent(struct xfs_mount *mp, struct xfs_trans *tp,
178 struct xfs_inode *ip, int whichfork,
179 struct xfs_bmbt_irec *imap);
180void xfs_rmap_alloc_extent(struct xfs_trans *tp, xfs_agnumber_t agno,
181 xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner);
182void xfs_rmap_free_extent(struct xfs_trans *tp, xfs_agnumber_t agno,
183 xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner);
184
185void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp,
186 struct xfs_btree_cur *rcur, int error);
187int xfs_rmap_finish_one(struct xfs_trans *tp, struct xfs_rmap_intent *ri,
188 struct xfs_btree_cur **pcur);
189int __xfs_rmap_finish_intent(struct xfs_btree_cur *rcur,
190 enum xfs_rmap_intent_type op, xfs_agblock_t bno,
191 xfs_extlen_t len, const struct xfs_owner_info *oinfo,
192 bool unwritten);
193
194int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno,
195 uint64_t owner, uint64_t offset, unsigned int flags,
196 struct xfs_rmap_irec *irec, int *stat);
197int xfs_rmap_compare(const struct xfs_rmap_irec *a,
198 const struct xfs_rmap_irec *b);
199union xfs_btree_rec;
200xfs_failaddr_t xfs_rmap_btrec_to_irec(const union xfs_btree_rec *rec,
201 struct xfs_rmap_irec *irec);
202xfs_failaddr_t xfs_rmap_check_irec(struct xfs_perag *pag,
203 const struct xfs_rmap_irec *irec);
204
205int xfs_rmap_has_records(struct xfs_btree_cur *cur, xfs_agblock_t bno,
206 xfs_extlen_t len, enum xbtree_recpacking *outcome);
207
208struct xfs_rmap_matches {
209 /* Number of owner matches. */
210 unsigned long long matches;
211
212 /* Number of non-owner matches. */
213 unsigned long long non_owner_matches;
214
215 /* Number of non-owner matches that conflict with the owner matches. */
216 unsigned long long bad_non_owner_matches;
217};
218
219int xfs_rmap_count_owners(struct xfs_btree_cur *cur, xfs_agblock_t bno,
220 xfs_extlen_t len, const struct xfs_owner_info *oinfo,
221 struct xfs_rmap_matches *rmatch);
222int xfs_rmap_has_other_keys(struct xfs_btree_cur *cur, xfs_agblock_t bno,
223 xfs_extlen_t len, const struct xfs_owner_info *oinfo,
224 bool *has_other);
225int xfs_rmap_map_raw(struct xfs_btree_cur *cur, struct xfs_rmap_irec *rmap);
226
227extern const struct xfs_owner_info XFS_RMAP_OINFO_SKIP_UPDATE;
228extern const struct xfs_owner_info XFS_RMAP_OINFO_ANY_OWNER;
229extern const struct xfs_owner_info XFS_RMAP_OINFO_FS;
230extern const struct xfs_owner_info XFS_RMAP_OINFO_LOG;
231extern const struct xfs_owner_info XFS_RMAP_OINFO_AG;
232extern const struct xfs_owner_info XFS_RMAP_OINFO_INOBT;
233extern const struct xfs_owner_info XFS_RMAP_OINFO_INODES;
234extern const struct xfs_owner_info XFS_RMAP_OINFO_REFC;
235extern const struct xfs_owner_info XFS_RMAP_OINFO_COW;
236
237extern struct kmem_cache *xfs_rmap_intent_cache;
238
239int __init xfs_rmap_intent_init_cache(void);
240void xfs_rmap_intent_destroy_cache(void);
241
242/*
243 * Parameters for tracking reverse mapping changes. The hook function arg
244 * parameter is enum xfs_rmap_intent_type, and the rest is below.
245 */
246struct xfs_rmap_update_params {
247 xfs_agblock_t startblock;
248 xfs_extlen_t blockcount;
249 struct xfs_owner_info oinfo;
250 bool unwritten;
251};
252
253#ifdef CONFIG_XFS_LIVE_HOOKS
254
255struct xfs_rmap_hook {
256 struct xfs_hook rmap_hook;
257};
258
259void xfs_rmap_hook_disable(void);
260void xfs_rmap_hook_enable(void);
261
262int xfs_rmap_hook_add(struct xfs_perag *pag, struct xfs_rmap_hook *hook);
263void xfs_rmap_hook_del(struct xfs_perag *pag, struct xfs_rmap_hook *hook);
264void xfs_rmap_hook_setup(struct xfs_rmap_hook *hook, notifier_fn_t mod_fn);
265#endif
266
267#endif /* __XFS_RMAP_H__ */