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37b3b4d6 | 1 | // SPDX-License-Identifier: GPL-2.0 |
2bd0ea18 | 2 | /* |
5e656dbb | 3 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
f302e9e4 | 4 | * All Rights Reserved. |
2bd0ea18 NS |
5 | */ |
6 | #ifndef __XFS_BMAP_H__ | |
dfc130f3 | 7 | #define __XFS_BMAP_H__ |
2bd0ea18 NS |
8 | |
9 | struct getbmap; | |
10 | struct xfs_bmbt_irec; | |
5e656dbb | 11 | struct xfs_ifork; |
2bd0ea18 NS |
12 | struct xfs_inode; |
13 | struct xfs_mount; | |
14 | struct xfs_trans; | |
15 | ||
5e656dbb BN |
16 | extern kmem_zone_t *xfs_bmap_free_item_zone; |
17 | ||
19ebedcf DC |
18 | /* |
19 | * Argument structure for xfs_bmap_alloc. | |
20 | */ | |
21 | struct xfs_bmalloca { | |
19ebedcf 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 */ | |
9788e059 | 32 | struct xfs_iext_cursor icur; /* incore extent cursor */ |
19ebedcf 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 */ | |
19ebedcf DC |
41 | bool aeof; /* allocated space at eof */ |
42 | bool conv; /* overwriting unwritten extents */ | |
1fccd5c8 | 43 | int datatype;/* data type being allocated */ |
19ebedcf DC |
44 | int flags; |
45 | }; | |
46 | ||
2bd0ea18 NS |
47 | /* |
48 | * List of extents to be free "later". | |
49 | * The list is kept sorted on xbf_startblock. | |
50 | */ | |
6f530e9a | 51 | struct xfs_extent_free_item |
2bd0ea18 | 52 | { |
6f530e9a 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; | |
85aec44f | 56 | struct xfs_owner_info xefi_oinfo; /* extent owner */ |
3a13f959 | 57 | bool xefi_skip_discard; |
2cf6d225 | 58 | }; |
2bd0ea18 | 59 | |
dfc130f3 | 60 | #define XFS_BMAP_MAX_NMAP 4 |
2bd0ea18 NS |
61 | |
62 | /* | |
a2ceac1f | 63 | * Flags for xfs_bmapi_* |
2bd0ea18 | 64 | */ |
a2ceac1f 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 */ | |
a2ceac1f | 69 | #define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */ |
56b2de80 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 | */ | |
a2ceac1f | 75 | #define XFS_BMAPI_CONVERT 0x040 |
56b2de80 | 76 | |
9542ae13 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 | ||
34621a47 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. | |
36b16da8 DW |
89 | * |
90 | * For bunmapi, this flag unmaps the range without adjusting quota, reducing | |
91 | * refcount, or freeing the blocks. | |
34621a47 DW |
92 | */ |
93 | #define XFS_BMAPI_REMAP 0x100 | |
94 | ||
cb8a004a DW |
95 | /* Map something in the CoW fork. */ |
96 | #define XFS_BMAPI_COWFORK 0x200 | |
97 | ||
3a13f959 BF |
98 | /* Skip online discard of freed extents */ |
99 | #define XFS_BMAPI_NODISCARD 0x1000 | |
100 | ||
5f847f1e DW |
101 | /* Do not update the rmap btree. Used for reconstructing bmbt from rmapbt. */ |
102 | #define XFS_BMAPI_NORMAP 0x2000 | |
103 | ||
56b2de80 | 104 | #define XFS_BMAPI_FLAGS \ |
56b2de80 DC |
105 | { XFS_BMAPI_ENTIRE, "ENTIRE" }, \ |
106 | { XFS_BMAPI_METADATA, "METADATA" }, \ | |
107 | { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \ | |
56b2de80 | 108 | { XFS_BMAPI_PREALLOC, "PREALLOC" }, \ |
56b2de80 | 109 | { XFS_BMAPI_CONTIG, "CONTIG" }, \ |
9542ae13 | 110 | { XFS_BMAPI_CONVERT, "CONVERT" }, \ |
34621a47 | 111 | { XFS_BMAPI_ZERO, "ZERO" }, \ |
cb8a004a | 112 | { XFS_BMAPI_REMAP, "REMAP" }, \ |
7075a23f | 113 | { XFS_BMAPI_COWFORK, "COWFORK" }, \ |
5f847f1e DW |
114 | { XFS_BMAPI_NODISCARD, "NODISCARD" }, \ |
115 | { XFS_BMAPI_NORMAP, "NORMAP" } | |
56b2de80 | 116 | |
2bd0ea18 | 117 | |
f302e9e4 NS |
118 | static inline int xfs_bmapi_aflag(int w) |
119 | { | |
cb8a004a DW |
120 | return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : |
121 | (w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0)); | |
122 | } | |
123 | ||
124 | static inline int xfs_bmapi_whichfork(int bmapi_flags) | |
125 | { | |
126 | if (bmapi_flags & XFS_BMAPI_COWFORK) | |
127 | return XFS_COW_FORK; | |
128 | else if (bmapi_flags & XFS_BMAPI_ATTRFORK) | |
129 | return XFS_ATTR_FORK; | |
130 | return XFS_DATA_FORK; | |
f302e9e4 | 131 | } |
2bd0ea18 NS |
132 | |
133 | /* | |
134 | * Special values for xfs_bmbt_irec_t br_startblock field. | |
135 | */ | |
dfc130f3 RC |
136 | #define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL) |
137 | #define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL) | |
2bd0ea18 | 138 | |
23aab3f9 | 139 | /* |
56b2de80 | 140 | * Flags for xfs_bmap_add_extent*. |
23aab3f9 | 141 | */ |
56b2de80 DC |
142 | #define BMAP_LEFT_CONTIG (1 << 0) |
143 | #define BMAP_RIGHT_CONTIG (1 << 1) | |
144 | #define BMAP_LEFT_FILLING (1 << 2) | |
145 | #define BMAP_RIGHT_FILLING (1 << 3) | |
146 | #define BMAP_LEFT_DELAY (1 << 4) | |
147 | #define BMAP_RIGHT_DELAY (1 << 5) | |
148 | #define BMAP_LEFT_VALID (1 << 6) | |
149 | #define BMAP_RIGHT_VALID (1 << 7) | |
150 | #define BMAP_ATTRFORK (1 << 8) | |
cb8a004a | 151 | #define BMAP_COWFORK (1 << 9) |
56b2de80 DC |
152 | |
153 | #define XFS_BMAP_EXT_FLAGS \ | |
154 | { BMAP_LEFT_CONTIG, "LC" }, \ | |
155 | { BMAP_RIGHT_CONTIG, "RC" }, \ | |
156 | { BMAP_LEFT_FILLING, "LF" }, \ | |
157 | { BMAP_RIGHT_FILLING, "RF" }, \ | |
cb8a004a DW |
158 | { BMAP_ATTRFORK, "ATTR" }, \ |
159 | { BMAP_COWFORK, "COW" } | |
23aab3f9 | 160 | |
ff105f75 | 161 | |
cd83dc79 CH |
162 | /* |
163 | * Return true if the extent is a real, allocated extent, or false if it is a | |
164 | * delayed allocation, and unwritten extent or a hole. | |
165 | */ | |
166 | static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec) | |
167 | { | |
168 | return irec->br_state != XFS_EXT_UNWRITTEN && | |
169 | irec->br_startblock != HOLESTARTBLOCK && | |
170 | irec->br_startblock != DELAYSTARTBLOCK && | |
171 | !isnullstartblock(irec->br_startblock); | |
172 | } | |
173 | ||
14790ed0 CH |
174 | /* |
175 | * Check the mapping for obviously garbage allocations that could trash the | |
176 | * filesystem immediately. | |
177 | */ | |
178 | #define xfs_valid_startblock(ip, startblock) \ | |
179 | ((startblock) != 0 || XFS_IS_REALTIME_INODE(ip)) | |
180 | ||
b3fd8db7 DW |
181 | void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno, |
182 | xfs_filblks_t len); | |
a2ceac1f | 183 | int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd); |
932b563e | 184 | int xfs_bmap_set_attrforkoff(struct xfs_inode *ip, int size, int *version); |
feee8e52 BF |
185 | void xfs_bmap_local_to_extents_empty(struct xfs_trans *tp, |
186 | struct xfs_inode *ip, int whichfork); | |
21375e5d | 187 | void __xfs_bmap_add_free(struct xfs_trans *tp, xfs_fsblock_t bno, |
5837e73b | 188 | xfs_filblks_t len, const struct xfs_owner_info *oinfo, |
21375e5d | 189 | bool skip_discard); |
a2ceac1f DC |
190 | void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork); |
191 | int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip, | |
192 | xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork); | |
193 | int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip, | |
194 | xfs_fileoff_t *last_block, int whichfork); | |
ff105f75 DC |
195 | int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused, |
196 | int whichfork); | |
a2ceac1f | 197 | int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork); |
a2ceac1f DC |
198 | int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno, |
199 | xfs_filblks_t len, struct xfs_bmbt_irec *mval, | |
200 | int *nmap, int flags); | |
a2ceac1f DC |
201 | int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip, |
202 | xfs_fileoff_t bno, xfs_filblks_t len, int flags, | |
b39f9fcb | 203 | xfs_extlen_t total, struct xfs_bmbt_irec *mval, int *nmap); |
3d36acda DW |
204 | int __xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip, |
205 | xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags, | |
d3c5f3dd | 206 | xfs_extnum_t nexts); |
a2ceac1f DC |
207 | int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip, |
208 | xfs_fileoff_t bno, xfs_filblks_t len, int flags, | |
d3c5f3dd | 209 | xfs_extnum_t nexts, int *done); |
ece930fa | 210 | int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork, |
9788e059 CH |
211 | struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got, |
212 | struct xfs_bmbt_irec *del); | |
213 | void xfs_bmap_del_extent_cow(struct xfs_inode *ip, | |
214 | struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got, | |
ece930fa | 215 | struct xfs_bmbt_irec *del); |
a2ceac1f | 216 | uint xfs_default_attroffset(struct xfs_inode *ip); |
a9f5d25e | 217 | int xfs_bmap_collapse_extents(struct xfs_trans *tp, struct xfs_inode *ip, |
19ebedcf | 218 | xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, |
a397f27d | 219 | bool *done); |
5b501597 DW |
220 | int xfs_bmap_can_insert_extents(struct xfs_inode *ip, xfs_fileoff_t off, |
221 | xfs_fileoff_t shift); | |
a9f5d25e CH |
222 | int xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip, |
223 | xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, | |
a397f27d | 224 | bool *done, xfs_fileoff_t stop_fsb); |
19ebedcf | 225 | int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset); |
cc66acaf | 226 | int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork, |
f7b1a8b1 | 227 | xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc, |
9788e059 CH |
228 | struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur, |
229 | int eof); | |
c784c9d2 CH |
230 | int xfs_bmapi_convert_delalloc(struct xfs_inode *ip, int whichfork, |
231 | xfs_fileoff_t offset_fsb, struct xfs_bmbt_irec *imap, | |
232 | unsigned int *seq); | |
9fa4db19 CH |
233 | int xfs_bmap_add_extent_unwritten_real(struct xfs_trans *tp, |
234 | struct xfs_inode *ip, int whichfork, | |
235 | struct xfs_iext_cursor *icur, struct xfs_btree_cur **curp, | |
236 | struct xfs_bmbt_irec *new, int *logflagsp); | |
56b2de80 | 237 | |
3a13f959 BF |
238 | static inline void |
239 | xfs_bmap_add_free( | |
21375e5d | 240 | struct xfs_trans *tp, |
3a13f959 BF |
241 | xfs_fsblock_t bno, |
242 | xfs_filblks_t len, | |
5837e73b | 243 | const struct xfs_owner_info *oinfo) |
3a13f959 | 244 | { |
21375e5d | 245 | __xfs_bmap_add_free(tp, bno, len, oinfo, false); |
3a13f959 BF |
246 | } |
247 | ||
34f8f3e1 DW |
248 | enum xfs_bmap_intent_type { |
249 | XFS_BMAP_MAP = 1, | |
250 | XFS_BMAP_UNMAP, | |
251 | }; | |
252 | ||
253 | struct xfs_bmap_intent { | |
254 | struct list_head bi_list; | |
255 | enum xfs_bmap_intent_type bi_type; | |
256 | struct xfs_inode *bi_owner; | |
257 | int bi_whichfork; | |
258 | struct xfs_bmbt_irec bi_bmap; | |
259 | }; | |
260 | ||
7b3ab230 BF |
261 | int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_inode *ip, |
262 | enum xfs_bmap_intent_type type, int whichfork, | |
263 | xfs_fileoff_t startoff, xfs_fsblock_t startblock, | |
594956fa | 264 | xfs_filblks_t *blockcount, xfs_exntst_t state); |
60a802cc | 265 | void xfs_bmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip, |
21375e5d | 266 | struct xfs_bmbt_irec *imap); |
60a802cc | 267 | void xfs_bmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip, |
21375e5d | 268 | struct xfs_bmbt_irec *imap); |
aeb88300 | 269 | |
7bd43334 CH |
270 | static inline int xfs_bmap_fork_to_state(int whichfork) |
271 | { | |
272 | switch (whichfork) { | |
273 | case XFS_ATTR_FORK: | |
274 | return BMAP_ATTRFORK; | |
275 | case XFS_COW_FORK: | |
276 | return BMAP_COWFORK; | |
277 | default: | |
278 | return 0; | |
279 | } | |
280 | } | |
281 | ||
0cf6a3a9 DW |
282 | xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork, |
283 | struct xfs_bmbt_irec *irec); | |
284 | ||
26d6a481 DW |
285 | int xfs_bmapi_remap(struct xfs_trans *tp, struct xfs_inode *ip, |
286 | xfs_fileoff_t bno, xfs_filblks_t len, xfs_fsblock_t startblock, | |
b5d7ff9a | 287 | int flags); |
26d6a481 | 288 | |
2bd0ea18 | 289 | #endif /* __XFS_BMAP_H__ */ |