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2bd0ea18 | 1 | /* |
5e656dbb | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
f302e9e4 | 3 | * All Rights Reserved. |
5000d01d | 4 | * |
f302e9e4 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
2bd0ea18 | 7 | * published by the Free Software Foundation. |
5000d01d | 8 | * |
f302e9e4 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
5000d01d | 13 | * |
f302e9e4 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
2bd0ea18 NS |
17 | */ |
18 | #ifndef __XFS_BMAP_H__ | |
dfc130f3 | 19 | #define __XFS_BMAP_H__ |
2bd0ea18 NS |
20 | |
21 | struct getbmap; | |
22 | struct xfs_bmbt_irec; | |
5e656dbb | 23 | struct xfs_ifork; |
2bd0ea18 NS |
24 | struct xfs_inode; |
25 | struct xfs_mount; | |
26 | struct xfs_trans; | |
27 | ||
5e656dbb BN |
28 | extern kmem_zone_t *xfs_bmap_free_item_zone; |
29 | ||
19ebedcf DC |
30 | /* |
31 | * Argument structure for xfs_bmap_alloc. | |
32 | */ | |
33 | struct xfs_bmalloca { | |
34 | xfs_fsblock_t *firstblock; /* i/o first block allocated */ | |
f33cea1a | 35 | struct xfs_defer_ops *dfops; /* bmap freelist */ |
19ebedcf DC |
36 | struct xfs_trans *tp; /* transaction pointer */ |
37 | struct xfs_inode *ip; /* incore inode pointer */ | |
38 | struct xfs_bmbt_irec prev; /* extent before the new one */ | |
39 | struct xfs_bmbt_irec got; /* extent after, or delayed */ | |
40 | ||
41 | xfs_fileoff_t offset; /* offset in file filling in */ | |
42 | xfs_extlen_t length; /* i/o length asked/allocated */ | |
43 | xfs_fsblock_t blkno; /* starting block of new extent */ | |
44 | ||
45 | struct xfs_btree_cur *cur; /* btree cursor */ | |
9788e059 | 46 | struct xfs_iext_cursor icur; /* incore extent cursor */ |
19ebedcf DC |
47 | int nallocs;/* number of extents alloc'd */ |
48 | int logflags;/* flags for transaction logging */ | |
49 | ||
50 | xfs_extlen_t total; /* total blocks needed for xaction */ | |
51 | xfs_extlen_t minlen; /* minimum allocation size (blocks) */ | |
52 | xfs_extlen_t minleft; /* amount must be left after alloc */ | |
53 | bool eof; /* set if allocating past last extent */ | |
54 | bool wasdel; /* replacing a delayed allocation */ | |
19ebedcf DC |
55 | bool aeof; /* allocated space at eof */ |
56 | bool conv; /* overwriting unwritten extents */ | |
1fccd5c8 | 57 | int datatype;/* data type being allocated */ |
19ebedcf DC |
58 | int flags; |
59 | }; | |
60 | ||
2bd0ea18 NS |
61 | /* |
62 | * List of extents to be free "later". | |
63 | * The list is kept sorted on xbf_startblock. | |
64 | */ | |
6f530e9a | 65 | struct xfs_extent_free_item |
2bd0ea18 | 66 | { |
6f530e9a DW |
67 | xfs_fsblock_t xefi_startblock;/* starting fs block number */ |
68 | xfs_extlen_t xefi_blockcount;/* number of blocks in extent */ | |
69 | struct list_head xefi_list; | |
85aec44f | 70 | struct xfs_owner_info xefi_oinfo; /* extent owner */ |
3a13f959 | 71 | bool xefi_skip_discard; |
2cf6d225 | 72 | }; |
2bd0ea18 | 73 | |
dfc130f3 | 74 | #define XFS_BMAP_MAX_NMAP 4 |
2bd0ea18 NS |
75 | |
76 | /* | |
a2ceac1f | 77 | * Flags for xfs_bmapi_* |
2bd0ea18 | 78 | */ |
a2ceac1f DC |
79 | #define XFS_BMAPI_ENTIRE 0x001 /* return entire extent, not trimmed */ |
80 | #define XFS_BMAPI_METADATA 0x002 /* mapping metadata not user data */ | |
81 | #define XFS_BMAPI_ATTRFORK 0x004 /* use attribute fork not data */ | |
82 | #define XFS_BMAPI_PREALLOC 0x008 /* preallocation op: unwritten space */ | |
83 | #define XFS_BMAPI_IGSTATE 0x010 /* Ignore state - */ | |
2bd0ea18 | 84 | /* combine contig. space */ |
a2ceac1f | 85 | #define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */ |
56b2de80 DC |
86 | /* |
87 | * unwritten extent conversion - this needs write cache flushing and no additional | |
88 | * allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts | |
89 | * from written to unwritten, otherwise convert from unwritten to written. | |
90 | */ | |
a2ceac1f | 91 | #define XFS_BMAPI_CONVERT 0x040 |
56b2de80 | 92 | |
9542ae13 DC |
93 | /* |
94 | * allocate zeroed extents - this requires all newly allocated user data extents | |
95 | * to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set. | |
96 | * Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found | |
97 | * during the allocation range to zeroed written extents. | |
98 | */ | |
99 | #define XFS_BMAPI_ZERO 0x080 | |
100 | ||
34621a47 DW |
101 | /* |
102 | * Map the inode offset to the block given in ap->firstblock. Primarily | |
103 | * used for reflink. The range must be in a hole, and this flag cannot be | |
104 | * turned on with PREALLOC or CONVERT, and cannot be used on the attr fork. | |
36b16da8 DW |
105 | * |
106 | * For bunmapi, this flag unmaps the range without adjusting quota, reducing | |
107 | * refcount, or freeing the blocks. | |
34621a47 DW |
108 | */ |
109 | #define XFS_BMAPI_REMAP 0x100 | |
110 | ||
cb8a004a DW |
111 | /* Map something in the CoW fork. */ |
112 | #define XFS_BMAPI_COWFORK 0x200 | |
113 | ||
7075a23f CH |
114 | /* Only convert delalloc space, don't allocate entirely new extents */ |
115 | #define XFS_BMAPI_DELALLOC 0x400 | |
116 | ||
8e87c884 CH |
117 | /* Only convert unwritten extents, don't allocate new blocks */ |
118 | #define XFS_BMAPI_CONVERT_ONLY 0x800 | |
119 | ||
3a13f959 BF |
120 | /* Skip online discard of freed extents */ |
121 | #define XFS_BMAPI_NODISCARD 0x1000 | |
122 | ||
5f847f1e DW |
123 | /* Do not update the rmap btree. Used for reconstructing bmbt from rmapbt. */ |
124 | #define XFS_BMAPI_NORMAP 0x2000 | |
125 | ||
56b2de80 | 126 | #define XFS_BMAPI_FLAGS \ |
56b2de80 DC |
127 | { XFS_BMAPI_ENTIRE, "ENTIRE" }, \ |
128 | { XFS_BMAPI_METADATA, "METADATA" }, \ | |
129 | { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \ | |
56b2de80 DC |
130 | { XFS_BMAPI_PREALLOC, "PREALLOC" }, \ |
131 | { XFS_BMAPI_IGSTATE, "IGSTATE" }, \ | |
132 | { XFS_BMAPI_CONTIG, "CONTIG" }, \ | |
9542ae13 | 133 | { XFS_BMAPI_CONVERT, "CONVERT" }, \ |
34621a47 | 134 | { XFS_BMAPI_ZERO, "ZERO" }, \ |
cb8a004a | 135 | { XFS_BMAPI_REMAP, "REMAP" }, \ |
7075a23f | 136 | { XFS_BMAPI_COWFORK, "COWFORK" }, \ |
8e87c884 | 137 | { XFS_BMAPI_DELALLOC, "DELALLOC" }, \ |
3a13f959 | 138 | { XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }, \ |
5f847f1e DW |
139 | { XFS_BMAPI_NODISCARD, "NODISCARD" }, \ |
140 | { XFS_BMAPI_NORMAP, "NORMAP" } | |
56b2de80 | 141 | |
2bd0ea18 | 142 | |
f302e9e4 NS |
143 | static inline int xfs_bmapi_aflag(int w) |
144 | { | |
cb8a004a DW |
145 | return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : |
146 | (w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0)); | |
147 | } | |
148 | ||
149 | static inline int xfs_bmapi_whichfork(int bmapi_flags) | |
150 | { | |
151 | if (bmapi_flags & XFS_BMAPI_COWFORK) | |
152 | return XFS_COW_FORK; | |
153 | else if (bmapi_flags & XFS_BMAPI_ATTRFORK) | |
154 | return XFS_ATTR_FORK; | |
155 | return XFS_DATA_FORK; | |
f302e9e4 | 156 | } |
2bd0ea18 NS |
157 | |
158 | /* | |
159 | * Special values for xfs_bmbt_irec_t br_startblock field. | |
160 | */ | |
dfc130f3 RC |
161 | #define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL) |
162 | #define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL) | |
2bd0ea18 | 163 | |
23aab3f9 | 164 | /* |
56b2de80 | 165 | * Flags for xfs_bmap_add_extent*. |
23aab3f9 | 166 | */ |
56b2de80 DC |
167 | #define BMAP_LEFT_CONTIG (1 << 0) |
168 | #define BMAP_RIGHT_CONTIG (1 << 1) | |
169 | #define BMAP_LEFT_FILLING (1 << 2) | |
170 | #define BMAP_RIGHT_FILLING (1 << 3) | |
171 | #define BMAP_LEFT_DELAY (1 << 4) | |
172 | #define BMAP_RIGHT_DELAY (1 << 5) | |
173 | #define BMAP_LEFT_VALID (1 << 6) | |
174 | #define BMAP_RIGHT_VALID (1 << 7) | |
175 | #define BMAP_ATTRFORK (1 << 8) | |
cb8a004a | 176 | #define BMAP_COWFORK (1 << 9) |
56b2de80 DC |
177 | |
178 | #define XFS_BMAP_EXT_FLAGS \ | |
179 | { BMAP_LEFT_CONTIG, "LC" }, \ | |
180 | { BMAP_RIGHT_CONTIG, "RC" }, \ | |
181 | { BMAP_LEFT_FILLING, "LF" }, \ | |
182 | { BMAP_RIGHT_FILLING, "RF" }, \ | |
cb8a004a DW |
183 | { BMAP_ATTRFORK, "ATTR" }, \ |
184 | { BMAP_COWFORK, "COW" } | |
23aab3f9 | 185 | |
ff105f75 | 186 | |
cd83dc79 CH |
187 | /* |
188 | * Return true if the extent is a real, allocated extent, or false if it is a | |
189 | * delayed allocation, and unwritten extent or a hole. | |
190 | */ | |
191 | static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec) | |
192 | { | |
193 | return irec->br_state != XFS_EXT_UNWRITTEN && | |
194 | irec->br_startblock != HOLESTARTBLOCK && | |
195 | irec->br_startblock != DELAYSTARTBLOCK && | |
196 | !isnullstartblock(irec->br_startblock); | |
197 | } | |
198 | ||
b3fd8db7 DW |
199 | void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno, |
200 | xfs_filblks_t len); | |
ca75eb20 | 201 | void xfs_trim_extent_eof(struct xfs_bmbt_irec *, struct xfs_inode *); |
a2ceac1f | 202 | int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd); |
3f17ed4b | 203 | void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork); |
3a13f959 | 204 | void __xfs_bmap_add_free(struct xfs_mount *mp, struct xfs_defer_ops *dfops, |
85aec44f | 205 | xfs_fsblock_t bno, xfs_filblks_t len, |
3a13f959 | 206 | struct xfs_owner_info *oinfo, bool skip_discard); |
a2ceac1f DC |
207 | void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork); |
208 | int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip, | |
209 | xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork); | |
210 | int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip, | |
211 | xfs_fileoff_t *last_block, int whichfork); | |
ff105f75 DC |
212 | int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused, |
213 | int whichfork); | |
a2ceac1f | 214 | int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork); |
a2ceac1f DC |
215 | int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno, |
216 | xfs_filblks_t len, struct xfs_bmbt_irec *mval, | |
217 | int *nmap, int flags); | |
a2ceac1f DC |
218 | int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip, |
219 | xfs_fileoff_t bno, xfs_filblks_t len, int flags, | |
220 | xfs_fsblock_t *firstblock, xfs_extlen_t total, | |
221 | struct xfs_bmbt_irec *mval, int *nmap, | |
f33cea1a | 222 | struct xfs_defer_ops *dfops); |
3d36acda DW |
223 | int __xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip, |
224 | xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags, | |
225 | xfs_extnum_t nexts, xfs_fsblock_t *firstblock, | |
226 | struct xfs_defer_ops *dfops); | |
a2ceac1f DC |
227 | int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip, |
228 | xfs_fileoff_t bno, xfs_filblks_t len, int flags, | |
229 | xfs_extnum_t nexts, xfs_fsblock_t *firstblock, | |
f33cea1a | 230 | struct xfs_defer_ops *dfops, int *done); |
ece930fa | 231 | int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork, |
9788e059 CH |
232 | struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got, |
233 | struct xfs_bmbt_irec *del); | |
234 | void xfs_bmap_del_extent_cow(struct xfs_inode *ip, | |
235 | struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got, | |
ece930fa | 236 | struct xfs_bmbt_irec *del); |
a2ceac1f | 237 | uint xfs_default_attroffset(struct xfs_inode *ip); |
a9f5d25e | 238 | int xfs_bmap_collapse_extents(struct xfs_trans *tp, struct xfs_inode *ip, |
19ebedcf | 239 | xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, |
1421de38 | 240 | bool *done, xfs_fsblock_t *firstblock, |
a9f5d25e CH |
241 | struct xfs_defer_ops *dfops); |
242 | int xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip, | |
243 | xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, | |
244 | bool *done, xfs_fileoff_t stop_fsb, xfs_fsblock_t *firstblock, | |
245 | struct xfs_defer_ops *dfops); | |
19ebedcf | 246 | int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset); |
cc66acaf | 247 | int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork, |
f7b1a8b1 | 248 | xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc, |
9788e059 CH |
249 | struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur, |
250 | int eof); | |
56b2de80 | 251 | |
3a13f959 BF |
252 | static inline void |
253 | xfs_bmap_add_free( | |
254 | struct xfs_mount *mp, | |
255 | struct xfs_defer_ops *dfops, | |
256 | xfs_fsblock_t bno, | |
257 | xfs_filblks_t len, | |
258 | struct xfs_owner_info *oinfo) | |
259 | { | |
260 | __xfs_bmap_add_free(mp, dfops, bno, len, oinfo, false); | |
261 | } | |
262 | ||
263 | static inline void | |
264 | xfs_bmap_add_free_nodiscard( | |
265 | struct xfs_mount *mp, | |
266 | struct xfs_defer_ops *dfops, | |
267 | xfs_fsblock_t bno, | |
268 | xfs_filblks_t len, | |
269 | struct xfs_owner_info *oinfo) | |
270 | { | |
271 | __xfs_bmap_add_free(mp, dfops, bno, len, oinfo, true); | |
272 | } | |
273 | ||
34f8f3e1 DW |
274 | enum xfs_bmap_intent_type { |
275 | XFS_BMAP_MAP = 1, | |
276 | XFS_BMAP_UNMAP, | |
277 | }; | |
278 | ||
279 | struct xfs_bmap_intent { | |
280 | struct list_head bi_list; | |
281 | enum xfs_bmap_intent_type bi_type; | |
282 | struct xfs_inode *bi_owner; | |
283 | int bi_whichfork; | |
284 | struct xfs_bmbt_irec bi_bmap; | |
285 | }; | |
286 | ||
aeb88300 DW |
287 | int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_defer_ops *dfops, |
288 | struct xfs_inode *ip, enum xfs_bmap_intent_type type, | |
289 | int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock, | |
594956fa | 290 | xfs_filblks_t *blockcount, xfs_exntst_t state); |
aeb88300 DW |
291 | int xfs_bmap_map_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, |
292 | struct xfs_inode *ip, struct xfs_bmbt_irec *imap); | |
293 | int xfs_bmap_unmap_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, | |
294 | struct xfs_inode *ip, struct xfs_bmbt_irec *imap); | |
295 | ||
7bd43334 CH |
296 | static inline int xfs_bmap_fork_to_state(int whichfork) |
297 | { | |
298 | switch (whichfork) { | |
299 | case XFS_ATTR_FORK: | |
300 | return BMAP_ATTRFORK; | |
301 | case XFS_COW_FORK: | |
302 | return BMAP_COWFORK; | |
303 | default: | |
304 | return 0; | |
305 | } | |
306 | } | |
307 | ||
0cf6a3a9 DW |
308 | xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork, |
309 | struct xfs_bmbt_irec *irec); | |
310 | ||
2bd0ea18 | 311 | #endif /* __XFS_BMAP_H__ */ |