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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
3e57ecf6 | 3 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 4 | * All Rights Reserved. |
1da177e4 LT |
5 | */ |
6 | #ifndef __XFS_BMAP_H__ | |
7 | #define __XFS_BMAP_H__ | |
8 | ||
9 | struct getbmap; | |
10 | struct xfs_bmbt_irec; | |
4eea22f0 | 11 | struct xfs_ifork; |
1da177e4 LT |
12 | struct xfs_inode; |
13 | struct xfs_mount; | |
14 | struct xfs_trans; | |
15 | ||
a8272ce0 DC |
16 | extern kmem_zone_t *xfs_bmap_free_item_zone; |
17 | ||
9799b438 DC |
18 | /* |
19 | * Argument structure for xfs_bmap_alloc. | |
20 | */ | |
21 | struct xfs_bmalloca { | |
9799b438 DC |
22 | struct xfs_trans *tp; /* transaction pointer */ |
23 | struct xfs_inode *ip; /* incore inode pointer */ | |
24 | struct xfs_bmbt_irec prev; /* extent before the new one */ | |
25 | struct xfs_bmbt_irec got; /* extent after, or delayed */ | |
26 | ||
27 | xfs_fileoff_t offset; /* offset in file filling in */ | |
28 | xfs_extlen_t length; /* i/o length asked/allocated */ | |
29 | xfs_fsblock_t blkno; /* starting block of new extent */ | |
30 | ||
31 | struct xfs_btree_cur *cur; /* btree cursor */ | |
b2b1712a | 32 | struct xfs_iext_cursor icur; /* incore extent cursor */ |
9799b438 DC |
33 | int nallocs;/* number of extents alloc'd */ |
34 | int logflags;/* flags for transaction logging */ | |
35 | ||
36 | xfs_extlen_t total; /* total blocks needed for xaction */ | |
37 | xfs_extlen_t minlen; /* minimum allocation size (blocks) */ | |
38 | xfs_extlen_t minleft; /* amount must be left after alloc */ | |
39 | bool eof; /* set if allocating past last extent */ | |
40 | bool wasdel; /* replacing a delayed allocation */ | |
9799b438 DC |
41 | bool aeof; /* allocated space at eof */ |
42 | bool conv; /* overwriting unwritten extents */ | |
292378ed | 43 | int datatype;/* data type being allocated */ |
9799b438 DC |
44 | int flags; |
45 | }; | |
46 | ||
1da177e4 LT |
47 | /* |
48 | * List of extents to be free "later". | |
49 | * The list is kept sorted on xbf_startblock. | |
50 | */ | |
310a75a3 | 51 | struct xfs_extent_free_item |
1da177e4 | 52 | { |
310a75a3 DW |
53 | xfs_fsblock_t xefi_startblock;/* starting fs block number */ |
54 | xfs_extlen_t xefi_blockcount;/* number of blocks in extent */ | |
55 | struct list_head xefi_list; | |
340785cc | 56 | struct xfs_owner_info xefi_oinfo; /* extent owner */ |
fcb762f5 | 57 | bool xefi_skip_discard; |
e66a4c67 | 58 | }; |
1da177e4 | 59 | |
1da177e4 LT |
60 | #define XFS_BMAP_MAX_NMAP 4 |
61 | ||
62 | /* | |
c0dc7828 | 63 | * Flags for xfs_bmapi_* |
1da177e4 | 64 | */ |
c0dc7828 DC |
65 | #define XFS_BMAPI_ENTIRE 0x001 /* return entire extent, not trimmed */ |
66 | #define XFS_BMAPI_METADATA 0x002 /* mapping metadata not user data */ | |
67 | #define XFS_BMAPI_ATTRFORK 0x004 /* use attribute fork not data */ | |
68 | #define XFS_BMAPI_PREALLOC 0x008 /* preallocation op: unwritten space */ | |
c0dc7828 | 69 | #define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */ |
44722352 DC |
70 | /* |
71 | * unwritten extent conversion - this needs write cache flushing and no additional | |
72 | * allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts | |
73 | * from written to unwritten, otherwise convert from unwritten to written. | |
74 | */ | |
c0dc7828 | 75 | #define XFS_BMAPI_CONVERT 0x040 |
1da177e4 | 76 | |
3fbbbea3 DC |
77 | /* |
78 | * allocate zeroed extents - this requires all newly allocated user data extents | |
79 | * to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set. | |
80 | * Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found | |
81 | * during the allocation range to zeroed written extents. | |
82 | */ | |
83 | #define XFS_BMAPI_ZERO 0x080 | |
84 | ||
f65306ea DW |
85 | /* |
86 | * Map the inode offset to the block given in ap->firstblock. Primarily | |
87 | * used for reflink. The range must be in a hole, and this flag cannot be | |
88 | * turned on with PREALLOC or CONVERT, and cannot be used on the attr fork. | |
4847acf8 DW |
89 | * |
90 | * For bunmapi, this flag unmaps the range without adjusting quota, reducing | |
91 | * refcount, or freeing the blocks. | |
f65306ea DW |
92 | */ |
93 | #define XFS_BMAPI_REMAP 0x100 | |
94 | ||
3993baeb DW |
95 | /* Map something in the CoW fork. */ |
96 | #define XFS_BMAPI_COWFORK 0x200 | |
97 | ||
b121459c CH |
98 | /* Only convert unwritten extents, don't allocate new blocks */ |
99 | #define XFS_BMAPI_CONVERT_ONLY 0x800 | |
100 | ||
fcb762f5 BF |
101 | /* Skip online discard of freed extents */ |
102 | #define XFS_BMAPI_NODISCARD 0x1000 | |
103 | ||
95eb308c DW |
104 | /* Do not update the rmap btree. Used for reconstructing bmbt from rmapbt. */ |
105 | #define XFS_BMAPI_NORMAP 0x2000 | |
106 | ||
0b1b213f | 107 | #define XFS_BMAPI_FLAGS \ |
0b1b213f CH |
108 | { XFS_BMAPI_ENTIRE, "ENTIRE" }, \ |
109 | { XFS_BMAPI_METADATA, "METADATA" }, \ | |
0b1b213f | 110 | { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \ |
0b1b213f | 111 | { XFS_BMAPI_PREALLOC, "PREALLOC" }, \ |
0b1b213f | 112 | { XFS_BMAPI_CONTIG, "CONTIG" }, \ |
3fbbbea3 | 113 | { XFS_BMAPI_CONVERT, "CONVERT" }, \ |
f65306ea | 114 | { XFS_BMAPI_ZERO, "ZERO" }, \ |
3993baeb | 115 | { XFS_BMAPI_REMAP, "REMAP" }, \ |
d2b3964a | 116 | { XFS_BMAPI_COWFORK, "COWFORK" }, \ |
fcb762f5 | 117 | { XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }, \ |
95eb308c DW |
118 | { XFS_BMAPI_NODISCARD, "NODISCARD" }, \ |
119 | { XFS_BMAPI_NORMAP, "NORMAP" } | |
0b1b213f CH |
120 | |
121 | ||
a844f451 NS |
122 | static inline int xfs_bmapi_aflag(int w) |
123 | { | |
3993baeb DW |
124 | return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : |
125 | (w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0)); | |
126 | } | |
127 | ||
128 | static inline int xfs_bmapi_whichfork(int bmapi_flags) | |
129 | { | |
130 | if (bmapi_flags & XFS_BMAPI_COWFORK) | |
131 | return XFS_COW_FORK; | |
132 | else if (bmapi_flags & XFS_BMAPI_ATTRFORK) | |
133 | return XFS_ATTR_FORK; | |
134 | return XFS_DATA_FORK; | |
a844f451 | 135 | } |
1da177e4 LT |
136 | |
137 | /* | |
138 | * Special values for xfs_bmbt_irec_t br_startblock field. | |
139 | */ | |
140 | #define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL) | |
141 | #define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL) | |
142 | ||
7574aa92 CH |
143 | /* |
144 | * Flags for xfs_bmap_add_extent*. | |
145 | */ | |
146 | #define BMAP_LEFT_CONTIG (1 << 0) | |
147 | #define BMAP_RIGHT_CONTIG (1 << 1) | |
148 | #define BMAP_LEFT_FILLING (1 << 2) | |
149 | #define BMAP_RIGHT_FILLING (1 << 3) | |
150 | #define BMAP_LEFT_DELAY (1 << 4) | |
151 | #define BMAP_RIGHT_DELAY (1 << 5) | |
152 | #define BMAP_LEFT_VALID (1 << 6) | |
153 | #define BMAP_RIGHT_VALID (1 << 7) | |
6ef35544 | 154 | #define BMAP_ATTRFORK (1 << 8) |
3993baeb | 155 | #define BMAP_COWFORK (1 << 9) |
7574aa92 | 156 | |
0b1b213f CH |
157 | #define XFS_BMAP_EXT_FLAGS \ |
158 | { BMAP_LEFT_CONTIG, "LC" }, \ | |
159 | { BMAP_RIGHT_CONTIG, "RC" }, \ | |
160 | { BMAP_LEFT_FILLING, "LF" }, \ | |
161 | { BMAP_RIGHT_FILLING, "RF" }, \ | |
3993baeb DW |
162 | { BMAP_ATTRFORK, "ATTR" }, \ |
163 | { BMAP_COWFORK, "COW" } | |
1da177e4 | 164 | |
e1d8fb88 | 165 | |
9c4f29d3 CH |
166 | /* |
167 | * Return true if the extent is a real, allocated extent, or false if it is a | |
168 | * delayed allocation, and unwritten extent or a hole. | |
169 | */ | |
170 | static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec) | |
171 | { | |
172 | return irec->br_state != XFS_EXT_UNWRITTEN && | |
173 | irec->br_startblock != HOLESTARTBLOCK && | |
174 | irec->br_startblock != DELAYSTARTBLOCK && | |
175 | !isnullstartblock(irec->br_startblock); | |
176 | } | |
177 | ||
0a0af28c DW |
178 | void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno, |
179 | xfs_filblks_t len); | |
d952e2f8 | 180 | int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd); |
2f3cd809 | 181 | int xfs_bmap_set_attrforkoff(struct xfs_inode *ip, int size, int *version); |
f3508bcd | 182 | void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork); |
0f37d178 | 183 | void __xfs_bmap_add_free(struct xfs_trans *tp, xfs_fsblock_t bno, |
66e3237e | 184 | xfs_filblks_t len, const struct xfs_owner_info *oinfo, |
0f37d178 | 185 | bool skip_discard); |
d952e2f8 CH |
186 | void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork); |
187 | int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip, | |
188 | xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork); | |
189 | int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip, | |
190 | xfs_fileoff_t *last_block, int whichfork); | |
7fb2cd4d ES |
191 | int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused, |
192 | int whichfork); | |
d952e2f8 | 193 | int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork); |
5c8ed202 DC |
194 | int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno, |
195 | xfs_filblks_t len, struct xfs_bmbt_irec *mval, | |
196 | int *nmap, int flags); | |
c0dc7828 DC |
197 | int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip, |
198 | xfs_fileoff_t bno, xfs_filblks_t len, int flags, | |
a7beabea | 199 | xfs_extlen_t total, struct xfs_bmbt_irec *mval, int *nmap); |
4453593b DW |
200 | int __xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip, |
201 | xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags, | |
2af52842 | 202 | xfs_extnum_t nexts); |
d952e2f8 CH |
203 | int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip, |
204 | xfs_fileoff_t bno, xfs_filblks_t len, int flags, | |
2af52842 | 205 | xfs_extnum_t nexts, int *done); |
fa5c836c | 206 | int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork, |
b2b1712a CH |
207 | struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got, |
208 | struct xfs_bmbt_irec *del); | |
209 | void xfs_bmap_del_extent_cow(struct xfs_inode *ip, | |
210 | struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got, | |
fa5c836c | 211 | struct xfs_bmbt_irec *del); |
d952e2f8 | 212 | uint xfs_default_attroffset(struct xfs_inode *ip); |
ecfea3f0 | 213 | int xfs_bmap_collapse_extents(struct xfs_trans *tp, struct xfs_inode *ip, |
a904b1ca | 214 | xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, |
333f950c | 215 | bool *done); |
f62cb48e DW |
216 | int xfs_bmap_can_insert_extents(struct xfs_inode *ip, xfs_fileoff_t off, |
217 | xfs_fileoff_t shift); | |
ecfea3f0 CH |
218 | int xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip, |
219 | xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, | |
333f950c | 220 | bool *done, xfs_fileoff_t stop_fsb); |
a904b1ca | 221 | int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset); |
be51f811 | 222 | int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork, |
974ae922 | 223 | xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc, |
b2b1712a CH |
224 | struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur, |
225 | int eof); | |
627209fb BF |
226 | int xfs_bmapi_convert_delalloc(struct xfs_trans *, struct xfs_inode *, |
227 | xfs_fileoff_t, int, struct xfs_bmbt_irec *); | |
1a5902c5 | 228 | |
fcb762f5 BF |
229 | static inline void |
230 | xfs_bmap_add_free( | |
0f37d178 | 231 | struct xfs_trans *tp, |
fcb762f5 BF |
232 | xfs_fsblock_t bno, |
233 | xfs_filblks_t len, | |
66e3237e | 234 | const struct xfs_owner_info *oinfo) |
fcb762f5 | 235 | { |
0f37d178 | 236 | __xfs_bmap_add_free(tp, bno, len, oinfo, false); |
fcb762f5 BF |
237 | } |
238 | ||
77d61fe4 DW |
239 | enum xfs_bmap_intent_type { |
240 | XFS_BMAP_MAP = 1, | |
241 | XFS_BMAP_UNMAP, | |
242 | }; | |
243 | ||
244 | struct xfs_bmap_intent { | |
245 | struct list_head bi_list; | |
246 | enum xfs_bmap_intent_type bi_type; | |
247 | struct xfs_inode *bi_owner; | |
248 | int bi_whichfork; | |
249 | struct xfs_bmbt_irec bi_bmap; | |
250 | }; | |
251 | ||
7dbddbac BF |
252 | int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_inode *ip, |
253 | enum xfs_bmap_intent_type type, int whichfork, | |
254 | xfs_fileoff_t startoff, xfs_fsblock_t startblock, | |
e1a4e37c | 255 | xfs_filblks_t *blockcount, xfs_exntst_t state); |
0f37d178 BF |
256 | int xfs_bmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip, |
257 | struct xfs_bmbt_irec *imap); | |
258 | int xfs_bmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip, | |
259 | struct xfs_bmbt_irec *imap); | |
9f3afb57 | 260 | |
060ea65b CH |
261 | static inline int xfs_bmap_fork_to_state(int whichfork) |
262 | { | |
263 | switch (whichfork) { | |
264 | case XFS_ATTR_FORK: | |
265 | return BMAP_ATTRFORK; | |
266 | case XFS_COW_FORK: | |
267 | return BMAP_COWFORK; | |
268 | default: | |
269 | return 0; | |
270 | } | |
271 | } | |
272 | ||
30b0984d DW |
273 | xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork, |
274 | struct xfs_bmbt_irec *irec); | |
275 | ||
7cf199ba DW |
276 | int xfs_bmapi_remap(struct xfs_trans *tp, struct xfs_inode *ip, |
277 | xfs_fileoff_t bno, xfs_filblks_t len, xfs_fsblock_t startblock, | |
ff3edf25 | 278 | int flags); |
7cf199ba | 279 | |
1da177e4 | 280 | #endif /* __XFS_BMAP_H__ */ |