Line data Source code
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 :
9 : struct xfs_perag;
10 :
11 : static inline void
12 : xfs_rmap_ino_bmbt_owner(
13 : struct xfs_owner_info *oi,
14 : xfs_ino_t ino,
15 : int whichfork)
16 : {
17 16311461 : oi->oi_owner = ino;
18 16311461 : oi->oi_offset = 0;
19 16311461 : oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK;
20 16311461 : if (whichfork == XFS_ATTR_FORK)
21 68880 : oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
22 : }
23 :
24 : static inline void
25 : xfs_rmap_ino_owner(
26 : struct xfs_owner_info *oi,
27 : xfs_ino_t ino,
28 : int whichfork,
29 : xfs_fileoff_t offset)
30 : {
31 617741062 : oi->oi_owner = ino;
32 617741062 : oi->oi_offset = offset;
33 617741062 : oi->oi_flags = 0;
34 617741062 : if (whichfork == XFS_ATTR_FORK)
35 7773608 : oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
36 : }
37 :
38 : static inline bool
39 : xfs_rmap_should_skip_owner_update(
40 : const struct xfs_owner_info *oi)
41 : {
42 303915230 : return oi->oi_owner == XFS_RMAP_OWN_NULL;
43 : }
44 :
45 : /* Reverse mapping functions. */
46 :
47 : struct xfs_buf;
48 :
49 : static inline __u64
50 5856085438 : xfs_rmap_irec_offset_pack(
51 : const struct xfs_rmap_irec *irec)
52 : {
53 5856085438 : __u64 x;
54 :
55 5856085438 : x = XFS_RMAP_OFF(irec->rm_offset);
56 5856085438 : if (irec->rm_flags & XFS_RMAP_ATTR_FORK)
57 1397316030 : x |= XFS_RMAP_OFF_ATTR_FORK;
58 5856085438 : if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK)
59 1396195221 : x |= XFS_RMAP_OFF_BMBT_BLOCK;
60 5856085438 : if (irec->rm_flags & XFS_RMAP_UNWRITTEN)
61 1678375601 : x |= XFS_RMAP_OFF_UNWRITTEN;
62 5856085438 : return x;
63 : }
64 :
65 : static inline xfs_failaddr_t
66 86379779998 : xfs_rmap_irec_offset_unpack(
67 : __u64 offset,
68 : struct xfs_rmap_irec *irec)
69 : {
70 86379779998 : if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS))
71 0 : return __this_address;
72 :
73 86379779998 : irec->rm_offset = XFS_RMAP_OFF(offset);
74 86379779998 : irec->rm_flags = 0;
75 86379779998 : if (offset & XFS_RMAP_OFF_ATTR_FORK)
76 1472076418 : irec->rm_flags |= XFS_RMAP_ATTR_FORK;
77 86379779998 : if (offset & XFS_RMAP_OFF_BMBT_BLOCK)
78 1309160389 : irec->rm_flags |= XFS_RMAP_BMBT_BLOCK;
79 86379779998 : if (offset & XFS_RMAP_OFF_UNWRITTEN)
80 15411781323 : irec->rm_flags |= XFS_RMAP_UNWRITTEN;
81 : return NULL;
82 : }
83 :
84 : static inline void
85 : xfs_owner_info_unpack(
86 : const struct xfs_owner_info *oinfo,
87 : uint64_t *owner,
88 : uint64_t *offset,
89 : unsigned int *flags)
90 : {
91 530014447 : unsigned int r = 0;
92 :
93 530014447 : *owner = oinfo->oi_owner;
94 530014447 : *offset = oinfo->oi_offset;
95 530014447 : if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK)
96 6303902 : r |= XFS_RMAP_ATTR_FORK;
97 530014447 : if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK)
98 4796374 : r |= XFS_RMAP_BMBT_BLOCK;
99 530014447 : *flags = r;
100 : }
101 :
102 : static inline void
103 : xfs_owner_info_pack(
104 : struct xfs_owner_info *oinfo,
105 : uint64_t owner,
106 : uint64_t offset,
107 : unsigned int flags)
108 : {
109 52623668 : oinfo->oi_owner = owner;
110 52623668 : oinfo->oi_offset = XFS_RMAP_OFF(offset);
111 52623668 : oinfo->oi_flags = 0;
112 52623668 : if (flags & XFS_RMAP_ATTR_FORK)
113 77893 : oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
114 52623668 : if (flags & XFS_RMAP_BMBT_BLOCK)
115 978485 : oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK;
116 : }
117 :
118 : int 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);
121 : int 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 :
125 : int 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);
128 : int 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);
131 : int 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);
134 : int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec,
135 : int *stat);
136 :
137 : typedef int (*xfs_rmap_query_range_fn)(
138 : struct xfs_btree_cur *cur,
139 : const struct xfs_rmap_irec *rec,
140 : void *priv);
141 :
142 : int 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);
146 : int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn,
147 : void *priv);
148 :
149 : enum 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 :
160 : struct 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 :
169 : void 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 */
173 : void xfs_rmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip,
174 : int whichfork, struct xfs_bmbt_irec *imap);
175 : void xfs_rmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip,
176 : int whichfork, struct xfs_bmbt_irec *imap);
177 : void 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);
180 : void xfs_rmap_alloc_extent(struct xfs_trans *tp, xfs_agnumber_t agno,
181 : xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner);
182 : void 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 :
185 : void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp,
186 : struct xfs_btree_cur *rcur, int error);
187 : int xfs_rmap_finish_one(struct xfs_trans *tp, struct xfs_rmap_intent *ri,
188 : struct xfs_btree_cur **pcur);
189 : int __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 :
194 : int 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);
197 : int xfs_rmap_compare(const struct xfs_rmap_irec *a,
198 : const struct xfs_rmap_irec *b);
199 : union xfs_btree_rec;
200 : xfs_failaddr_t xfs_rmap_btrec_to_irec(const union xfs_btree_rec *rec,
201 : struct xfs_rmap_irec *irec);
202 : xfs_failaddr_t xfs_rmap_check_perag_irec(struct xfs_perag *pag,
203 : const struct xfs_rmap_irec *irec);
204 : xfs_failaddr_t xfs_rmap_check_irec(struct xfs_btree_cur *cur,
205 : const struct xfs_rmap_irec *irec);
206 :
207 : int xfs_rmap_has_records(struct xfs_btree_cur *cur, xfs_agblock_t bno,
208 : xfs_extlen_t len, enum xbtree_recpacking *outcome);
209 :
210 : struct xfs_rmap_matches {
211 : /* Number of owner matches. */
212 : unsigned long long matches;
213 :
214 : /* Number of non-owner matches. */
215 : unsigned long long non_owner_matches;
216 :
217 : /* Number of non-owner matches that conflict with the owner matches. */
218 : unsigned long long bad_non_owner_matches;
219 : };
220 :
221 : int xfs_rmap_count_owners(struct xfs_btree_cur *cur, xfs_agblock_t bno,
222 : xfs_extlen_t len, const struct xfs_owner_info *oinfo,
223 : struct xfs_rmap_matches *rmatch);
224 : int xfs_rmap_has_other_keys(struct xfs_btree_cur *cur, xfs_agblock_t bno,
225 : xfs_extlen_t len, const struct xfs_owner_info *oinfo,
226 : bool *has_other);
227 : int xfs_rmap_map_raw(struct xfs_btree_cur *cur, struct xfs_rmap_irec *rmap);
228 :
229 : extern const struct xfs_owner_info XFS_RMAP_OINFO_SKIP_UPDATE;
230 : extern const struct xfs_owner_info XFS_RMAP_OINFO_ANY_OWNER;
231 : extern const struct xfs_owner_info XFS_RMAP_OINFO_FS;
232 : extern const struct xfs_owner_info XFS_RMAP_OINFO_LOG;
233 : extern const struct xfs_owner_info XFS_RMAP_OINFO_AG;
234 : extern const struct xfs_owner_info XFS_RMAP_OINFO_INOBT;
235 : extern const struct xfs_owner_info XFS_RMAP_OINFO_INODES;
236 : extern const struct xfs_owner_info XFS_RMAP_OINFO_REFC;
237 : extern const struct xfs_owner_info XFS_RMAP_OINFO_COW;
238 :
239 : extern struct kmem_cache *xfs_rmap_intent_cache;
240 :
241 : int __init xfs_rmap_intent_init_cache(void);
242 : void xfs_rmap_intent_destroy_cache(void);
243 :
244 : /*
245 : * Parameters for tracking reverse mapping changes. The hook function arg
246 : * parameter is enum xfs_rmap_intent_type, and the rest is below.
247 : */
248 : struct xfs_rmap_update_params {
249 : xfs_agblock_t startblock;
250 : xfs_extlen_t blockcount;
251 : struct xfs_owner_info oinfo;
252 : bool unwritten;
253 : };
254 :
255 : #ifdef CONFIG_XFS_LIVE_HOOKS
256 :
257 : struct xfs_rmap_hook {
258 : struct xfs_hook update_hook;
259 : };
260 :
261 : void xfs_rmap_hook_disable(void);
262 : void xfs_rmap_hook_enable(void);
263 :
264 : int xfs_rmap_hook_add(struct xfs_perag *pag, struct xfs_rmap_hook *hook);
265 : void xfs_rmap_hook_del(struct xfs_perag *pag, struct xfs_rmap_hook *hook);
266 : #endif
267 :
268 : #endif /* __XFS_RMAP_H__ */
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