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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 */ | |
46 | xfs_extnum_t idx; /* current extent index */ | |
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 */ |
2cf6d225 | 71 | }; |
2bd0ea18 | 72 | |
dfc130f3 | 73 | #define XFS_BMAP_MAX_NMAP 4 |
2bd0ea18 NS |
74 | |
75 | /* | |
a2ceac1f | 76 | * Flags for xfs_bmapi_* |
2bd0ea18 | 77 | */ |
a2ceac1f DC |
78 | #define XFS_BMAPI_ENTIRE 0x001 /* return entire extent, not trimmed */ |
79 | #define XFS_BMAPI_METADATA 0x002 /* mapping metadata not user data */ | |
80 | #define XFS_BMAPI_ATTRFORK 0x004 /* use attribute fork not data */ | |
81 | #define XFS_BMAPI_PREALLOC 0x008 /* preallocation op: unwritten space */ | |
82 | #define XFS_BMAPI_IGSTATE 0x010 /* Ignore state - */ | |
2bd0ea18 | 83 | /* combine contig. space */ |
a2ceac1f | 84 | #define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */ |
56b2de80 DC |
85 | /* |
86 | * unwritten extent conversion - this needs write cache flushing and no additional | |
87 | * allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts | |
88 | * from written to unwritten, otherwise convert from unwritten to written. | |
89 | */ | |
a2ceac1f | 90 | #define XFS_BMAPI_CONVERT 0x040 |
56b2de80 | 91 | |
9542ae13 DC |
92 | /* |
93 | * allocate zeroed extents - this requires all newly allocated user data extents | |
94 | * to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set. | |
95 | * Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found | |
96 | * during the allocation range to zeroed written extents. | |
97 | */ | |
98 | #define XFS_BMAPI_ZERO 0x080 | |
99 | ||
34621a47 DW |
100 | /* |
101 | * Map the inode offset to the block given in ap->firstblock. Primarily | |
102 | * used for reflink. The range must be in a hole, and this flag cannot be | |
103 | * turned on with PREALLOC or CONVERT, and cannot be used on the attr fork. | |
36b16da8 DW |
104 | * |
105 | * For bunmapi, this flag unmaps the range without adjusting quota, reducing | |
106 | * refcount, or freeing the blocks. | |
34621a47 DW |
107 | */ |
108 | #define XFS_BMAPI_REMAP 0x100 | |
109 | ||
56b2de80 | 110 | #define XFS_BMAPI_FLAGS \ |
56b2de80 DC |
111 | { XFS_BMAPI_ENTIRE, "ENTIRE" }, \ |
112 | { XFS_BMAPI_METADATA, "METADATA" }, \ | |
113 | { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \ | |
56b2de80 DC |
114 | { XFS_BMAPI_PREALLOC, "PREALLOC" }, \ |
115 | { XFS_BMAPI_IGSTATE, "IGSTATE" }, \ | |
116 | { XFS_BMAPI_CONTIG, "CONTIG" }, \ | |
9542ae13 | 117 | { XFS_BMAPI_CONVERT, "CONVERT" }, \ |
34621a47 DW |
118 | { XFS_BMAPI_ZERO, "ZERO" }, \ |
119 | { XFS_BMAPI_REMAP, "REMAP" } | |
56b2de80 | 120 | |
2bd0ea18 | 121 | |
f302e9e4 NS |
122 | static inline int xfs_bmapi_aflag(int w) |
123 | { | |
124 | return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : 0); | |
125 | } | |
2bd0ea18 NS |
126 | |
127 | /* | |
128 | * Special values for xfs_bmbt_irec_t br_startblock field. | |
129 | */ | |
dfc130f3 RC |
130 | #define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL) |
131 | #define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL) | |
2bd0ea18 | 132 | |
23aab3f9 | 133 | /* |
56b2de80 | 134 | * Flags for xfs_bmap_add_extent*. |
23aab3f9 | 135 | */ |
56b2de80 DC |
136 | #define BMAP_LEFT_CONTIG (1 << 0) |
137 | #define BMAP_RIGHT_CONTIG (1 << 1) | |
138 | #define BMAP_LEFT_FILLING (1 << 2) | |
139 | #define BMAP_RIGHT_FILLING (1 << 3) | |
140 | #define BMAP_LEFT_DELAY (1 << 4) | |
141 | #define BMAP_RIGHT_DELAY (1 << 5) | |
142 | #define BMAP_LEFT_VALID (1 << 6) | |
143 | #define BMAP_RIGHT_VALID (1 << 7) | |
144 | #define BMAP_ATTRFORK (1 << 8) | |
145 | ||
146 | #define XFS_BMAP_EXT_FLAGS \ | |
147 | { BMAP_LEFT_CONTIG, "LC" }, \ | |
148 | { BMAP_RIGHT_CONTIG, "RC" }, \ | |
149 | { BMAP_LEFT_FILLING, "LF" }, \ | |
150 | { BMAP_RIGHT_FILLING, "RF" }, \ | |
151 | { BMAP_ATTRFORK, "ATTR" } | |
23aab3f9 | 152 | |
ff105f75 DC |
153 | |
154 | /* | |
155 | * This macro is used to determine how many extents will be shifted | |
156 | * in one write transaction. We could require two splits, | |
157 | * an extent move on the first and an extent merge on the second, | |
158 | * So it is proper that one extent is shifted inside write transaction | |
159 | * at a time. | |
160 | */ | |
161 | #define XFS_BMAP_MAX_SHIFT_EXTENTS 1 | |
162 | ||
19ebedcf DC |
163 | enum shift_direction { |
164 | SHIFT_LEFT = 0, | |
165 | SHIFT_RIGHT, | |
166 | }; | |
167 | ||
1e2ecde4 | 168 | #ifdef DEBUG |
a2ceac1f DC |
169 | void xfs_bmap_trace_exlist(struct xfs_inode *ip, xfs_extnum_t cnt, |
170 | int whichfork, unsigned long caller_ip); | |
5e656dbb | 171 | #define XFS_BMAP_TRACE_EXLIST(ip,c,w) \ |
56b2de80 DC |
172 | xfs_bmap_trace_exlist(ip,c,w, _THIS_IP_) |
173 | #else | |
5e656dbb | 174 | #define XFS_BMAP_TRACE_EXLIST(ip,c,w) |
56b2de80 | 175 | #endif |
23aab3f9 | 176 | |
a2ceac1f | 177 | int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd); |
3f17ed4b | 178 | void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork); |
f33cea1a | 179 | void xfs_bmap_add_free(struct xfs_mount *mp, struct xfs_defer_ops *dfops, |
85aec44f DW |
180 | xfs_fsblock_t bno, xfs_filblks_t len, |
181 | struct xfs_owner_info *oinfo); | |
a2ceac1f DC |
182 | void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork); |
183 | int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip, | |
184 | xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork); | |
185 | int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip, | |
186 | xfs_fileoff_t *last_block, int whichfork); | |
ff105f75 DC |
187 | int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused, |
188 | int whichfork); | |
a2ceac1f DC |
189 | int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork); |
190 | int xfs_bmap_read_extents(struct xfs_trans *tp, struct xfs_inode *ip, | |
191 | int whichfork); | |
192 | int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno, | |
193 | xfs_filblks_t len, struct xfs_bmbt_irec *mval, | |
194 | int *nmap, int flags); | |
a2ceac1f DC |
195 | int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip, |
196 | xfs_fileoff_t bno, xfs_filblks_t len, int flags, | |
197 | xfs_fsblock_t *firstblock, xfs_extlen_t total, | |
198 | struct xfs_bmbt_irec *mval, int *nmap, | |
f33cea1a | 199 | struct xfs_defer_ops *dfops); |
3d36acda DW |
200 | int __xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip, |
201 | xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags, | |
202 | xfs_extnum_t nexts, xfs_fsblock_t *firstblock, | |
203 | struct xfs_defer_ops *dfops); | |
a2ceac1f DC |
204 | int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip, |
205 | xfs_fileoff_t bno, xfs_filblks_t len, int flags, | |
206 | xfs_extnum_t nexts, xfs_fsblock_t *firstblock, | |
f33cea1a | 207 | struct xfs_defer_ops *dfops, int *done); |
a2ceac1f DC |
208 | int xfs_check_nostate_extents(struct xfs_ifork *ifp, xfs_extnum_t idx, |
209 | xfs_extnum_t num); | |
210 | uint xfs_default_attroffset(struct xfs_inode *ip); | |
ff105f75 | 211 | int xfs_bmap_shift_extents(struct xfs_trans *tp, struct xfs_inode *ip, |
19ebedcf DC |
212 | xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, |
213 | int *done, xfs_fileoff_t stop_fsb, xfs_fsblock_t *firstblock, | |
f33cea1a | 214 | struct xfs_defer_ops *dfops, enum shift_direction direction, |
19ebedcf DC |
215 | int num_exts); |
216 | int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset); | |
4488e421 CH |
217 | struct xfs_bmbt_rec_host * |
218 | xfs_bmap_search_extents(struct xfs_inode *ip, xfs_fileoff_t bno, | |
219 | int fork, int *eofp, xfs_extnum_t *lastxp, | |
220 | struct xfs_bmbt_irec *gotp, struct xfs_bmbt_irec *prevp); | |
221 | int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, xfs_fileoff_t aoff, | |
222 | xfs_filblks_t len, struct xfs_bmbt_irec *got, | |
223 | struct xfs_bmbt_irec *prev, xfs_extnum_t *lastx, int eof); | |
56b2de80 | 224 | |
e515cca1 DC |
225 | struct xfs_bmbt_rec_host * |
226 | xfs_bmap_search_extents(struct xfs_inode *ip, xfs_fileoff_t bno, | |
227 | int fork, int *eofp, xfs_extnum_t *lastxp, | |
228 | struct xfs_bmbt_irec *gotp, | |
229 | struct xfs_bmbt_irec *prevp); | |
230 | ||
231 | ||
34f8f3e1 DW |
232 | enum xfs_bmap_intent_type { |
233 | XFS_BMAP_MAP = 1, | |
234 | XFS_BMAP_UNMAP, | |
235 | }; | |
236 | ||
237 | struct xfs_bmap_intent { | |
238 | struct list_head bi_list; | |
239 | enum xfs_bmap_intent_type bi_type; | |
240 | struct xfs_inode *bi_owner; | |
241 | int bi_whichfork; | |
242 | struct xfs_bmbt_irec bi_bmap; | |
243 | }; | |
244 | ||
aeb88300 DW |
245 | int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_defer_ops *dfops, |
246 | struct xfs_inode *ip, enum xfs_bmap_intent_type type, | |
247 | int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock, | |
248 | xfs_filblks_t blockcount, xfs_exntst_t state); | |
249 | int xfs_bmap_map_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, | |
250 | struct xfs_inode *ip, struct xfs_bmbt_irec *imap); | |
251 | int xfs_bmap_unmap_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, | |
252 | struct xfs_inode *ip, struct xfs_bmbt_irec *imap); | |
253 | ||
2bd0ea18 | 254 | #endif /* __XFS_BMAP_H__ */ |