Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 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. | |
1da177e4 | 13 | * |
7b718769 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 | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
632b89e8 | 20 | #include "xfs_shared.h" |
6ca1c906 | 21 | #include "xfs_format.h" |
239880ef DC |
22 | #include "xfs_log_format.h" |
23 | #include "xfs_trans_resv.h" | |
a844f451 | 24 | #include "xfs_bit.h" |
1da177e4 | 25 | #include "xfs_mount.h" |
1da177e4 | 26 | #include "xfs_inode.h" |
239880ef | 27 | #include "xfs_trans.h" |
a844f451 | 28 | #include "xfs_inode_item.h" |
1da177e4 | 29 | #include "xfs_alloc.h" |
a844f451 | 30 | #include "xfs_btree.h" |
a4fbe6ab | 31 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
32 | #include "xfs_bmap.h" |
33 | #include "xfs_error.h" | |
34 | #include "xfs_quota.h" | |
3d3e6f64 | 35 | #include "xfs_trace.h" |
ee1a47ab | 36 | #include "xfs_cksum.h" |
1da177e4 | 37 | |
1da177e4 LT |
38 | /* |
39 | * Determine the extent state. | |
40 | */ | |
41 | /* ARGSUSED */ | |
42 | STATIC xfs_exntst_t | |
43 | xfs_extent_state( | |
44 | xfs_filblks_t blks, | |
45 | int extent_flag) | |
46 | { | |
47 | if (extent_flag) { | |
48 | ASSERT(blks != 0); /* saved for DMIG */ | |
49 | return XFS_EXT_UNWRITTEN; | |
50 | } | |
51 | return XFS_EXT_NORM; | |
52 | } | |
53 | ||
1da177e4 LT |
54 | /* |
55 | * Convert on-disk form of btree root to in-memory form. | |
56 | */ | |
57 | void | |
58 | xfs_bmdr_to_bmbt( | |
ee1a47ab | 59 | struct xfs_inode *ip, |
1da177e4 LT |
60 | xfs_bmdr_block_t *dblock, |
61 | int dblocklen, | |
7cc95a82 | 62 | struct xfs_btree_block *rblock, |
1da177e4 LT |
63 | int rblocklen) |
64 | { | |
ee1a47ab | 65 | struct xfs_mount *mp = ip->i_mount; |
1da177e4 LT |
66 | int dmxr; |
67 | xfs_bmbt_key_t *fkp; | |
576039cf | 68 | __be64 *fpp; |
1da177e4 | 69 | xfs_bmbt_key_t *tkp; |
576039cf | 70 | __be64 *tpp; |
1da177e4 | 71 | |
ee1a47ab CH |
72 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
73 | xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL, | |
74 | XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino, | |
75 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
76 | else | |
77 | xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL, | |
78 | XFS_BMAP_MAGIC, 0, 0, ip->i_ino, | |
79 | XFS_BTREE_LONG_PTRS); | |
80 | ||
16259e7d CH |
81 | rblock->bb_level = dblock->bb_level; |
82 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); | |
83 | rblock->bb_numrecs = dblock->bb_numrecs; | |
152d93b7 | 84 | dmxr = xfs_bmdr_maxrecs(dblocklen, 0); |
136341b4 CH |
85 | fkp = XFS_BMDR_KEY_ADDR(dblock, 1); |
86 | tkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); | |
87 | fpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); | |
60197e8d | 88 | tpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
16259e7d | 89 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
1da177e4 | 90 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
576039cf | 91 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
1da177e4 LT |
92 | } |
93 | ||
1da177e4 LT |
94 | /* |
95 | * Convert a compressed bmap extent record to an uncompressed form. | |
96 | * This code must be in sync with the routines xfs_bmbt_get_startoff, | |
97 | * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state. | |
98 | */ | |
b8f82a4a | 99 | STATIC void |
1da177e4 LT |
100 | __xfs_bmbt_get_all( |
101 | __uint64_t l0, | |
102 | __uint64_t l1, | |
103 | xfs_bmbt_irec_t *s) | |
104 | { | |
105 | int ext_flag; | |
106 | xfs_exntst_t st; | |
107 | ||
108 | ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
109 | s->br_startoff = ((xfs_fileoff_t)l0 & | |
fb82557f | 110 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
fb82557f | 111 | s->br_startblock = (((xfs_fsblock_t)l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 | 112 | (((xfs_fsblock_t)l1) >> 21); |
fb82557f | 113 | s->br_blockcount = (xfs_filblks_t)(l1 & xfs_mask64lo(21)); |
1da177e4 LT |
114 | /* This is xfs_extent_state() in-line */ |
115 | if (ext_flag) { | |
116 | ASSERT(s->br_blockcount != 0); /* saved for DMIG */ | |
117 | st = XFS_EXT_UNWRITTEN; | |
118 | } else | |
119 | st = XFS_EXT_NORM; | |
120 | s->br_state = st; | |
121 | } | |
122 | ||
123 | void | |
124 | xfs_bmbt_get_all( | |
a6f64d4a | 125 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
126 | xfs_bmbt_irec_t *s) |
127 | { | |
128 | __xfs_bmbt_get_all(r->l0, r->l1, s); | |
129 | } | |
130 | ||
1da177e4 LT |
131 | /* |
132 | * Extract the blockcount field from an in memory bmap extent record. | |
133 | */ | |
134 | xfs_filblks_t | |
135 | xfs_bmbt_get_blockcount( | |
a6f64d4a | 136 | xfs_bmbt_rec_host_t *r) |
1da177e4 | 137 | { |
fb82557f | 138 | return (xfs_filblks_t)(r->l1 & xfs_mask64lo(21)); |
1da177e4 LT |
139 | } |
140 | ||
141 | /* | |
142 | * Extract the startblock field from an in memory bmap extent record. | |
143 | */ | |
144 | xfs_fsblock_t | |
145 | xfs_bmbt_get_startblock( | |
a6f64d4a | 146 | xfs_bmbt_rec_host_t *r) |
1da177e4 | 147 | { |
fb82557f | 148 | return (((xfs_fsblock_t)r->l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 | 149 | (((xfs_fsblock_t)r->l1) >> 21); |
1da177e4 LT |
150 | } |
151 | ||
152 | /* | |
153 | * Extract the startoff field from an in memory bmap extent record. | |
154 | */ | |
155 | xfs_fileoff_t | |
156 | xfs_bmbt_get_startoff( | |
a6f64d4a | 157 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
158 | { |
159 | return ((xfs_fileoff_t)r->l0 & | |
fb82557f | 160 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 LT |
161 | } |
162 | ||
163 | xfs_exntst_t | |
164 | xfs_bmbt_get_state( | |
a6f64d4a | 165 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
166 | { |
167 | int ext_flag; | |
168 | ||
169 | ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
170 | return xfs_extent_state(xfs_bmbt_get_blockcount(r), | |
171 | ext_flag); | |
172 | } | |
173 | ||
1da177e4 LT |
174 | /* |
175 | * Extract the blockcount field from an on disk bmap extent record. | |
176 | */ | |
177 | xfs_filblks_t | |
178 | xfs_bmbt_disk_get_blockcount( | |
179 | xfs_bmbt_rec_t *r) | |
180 | { | |
fb82557f | 181 | return (xfs_filblks_t)(be64_to_cpu(r->l1) & xfs_mask64lo(21)); |
1da177e4 LT |
182 | } |
183 | ||
1da177e4 LT |
184 | /* |
185 | * Extract the startoff field from a disk format bmap extent record. | |
186 | */ | |
187 | xfs_fileoff_t | |
188 | xfs_bmbt_disk_get_startoff( | |
189 | xfs_bmbt_rec_t *r) | |
190 | { | |
cd8b0a97 | 191 | return ((xfs_fileoff_t)be64_to_cpu(r->l0) & |
fb82557f | 192 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 | 193 | } |
1da177e4 | 194 | |
1da177e4 | 195 | |
1da177e4 LT |
196 | /* |
197 | * Set all the fields in a bmap extent record from the arguments. | |
198 | */ | |
199 | void | |
200 | xfs_bmbt_set_allf( | |
8cba4344 CH |
201 | xfs_bmbt_rec_host_t *r, |
202 | xfs_fileoff_t startoff, | |
203 | xfs_fsblock_t startblock, | |
204 | xfs_filblks_t blockcount, | |
205 | xfs_exntst_t state) | |
1da177e4 | 206 | { |
8cba4344 CH |
207 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
208 | ||
209 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
fb82557f ES |
210 | ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); |
211 | ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
1da177e4 | 212 | |
fb82557f | 213 | ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
8cba4344 | 214 | |
1da177e4 | 215 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
8cba4344 CH |
216 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
217 | ((xfs_bmbt_rec_base_t)startblock >> 43); | |
218 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
219 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 220 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 LT |
221 | } |
222 | ||
1da177e4 LT |
223 | /* |
224 | * Set all the fields in a bmap extent record from the uncompressed form. | |
225 | */ | |
226 | void | |
8cba4344 CH |
227 | xfs_bmbt_set_all( |
228 | xfs_bmbt_rec_host_t *r, | |
229 | xfs_bmbt_irec_t *s) | |
1da177e4 | 230 | { |
8cba4344 CH |
231 | xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock, |
232 | s->br_blockcount, s->br_state); | |
1da177e4 LT |
233 | } |
234 | ||
8cba4344 | 235 | |
1da177e4 LT |
236 | /* |
237 | * Set all the fields in a disk format bmap extent record from the arguments. | |
238 | */ | |
239 | void | |
240 | xfs_bmbt_disk_set_allf( | |
8cba4344 CH |
241 | xfs_bmbt_rec_t *r, |
242 | xfs_fileoff_t startoff, | |
243 | xfs_fsblock_t startblock, | |
244 | xfs_filblks_t blockcount, | |
245 | xfs_exntst_t state) | |
1da177e4 | 246 | { |
8cba4344 CH |
247 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
248 | ||
249 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
fb82557f ES |
250 | ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); |
251 | ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
fb82557f | 252 | ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
8cba4344 | 253 | |
cd8b0a97 | 254 | r->l0 = cpu_to_be64( |
8cba4344 CH |
255 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
256 | ((xfs_bmbt_rec_base_t)startoff << 9) | | |
257 | ((xfs_bmbt_rec_base_t)startblock >> 43)); | |
cd8b0a97 | 258 | r->l1 = cpu_to_be64( |
8cba4344 CH |
259 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
260 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 261 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21))); |
1da177e4 | 262 | } |
8cba4344 CH |
263 | |
264 | /* | |
265 | * Set all the fields in a bmap extent record from the uncompressed form. | |
266 | */ | |
5d77c0dc | 267 | STATIC void |
8cba4344 CH |
268 | xfs_bmbt_disk_set_all( |
269 | xfs_bmbt_rec_t *r, | |
270 | xfs_bmbt_irec_t *s) | |
271 | { | |
272 | xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock, | |
273 | s->br_blockcount, s->br_state); | |
274 | } | |
1da177e4 LT |
275 | |
276 | /* | |
277 | * Set the blockcount field in a bmap extent record. | |
278 | */ | |
279 | void | |
280 | xfs_bmbt_set_blockcount( | |
a6f64d4a | 281 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
282 | xfs_filblks_t v) |
283 | { | |
fb82557f ES |
284 | ASSERT((v & xfs_mask64hi(43)) == 0); |
285 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64hi(43)) | | |
286 | (xfs_bmbt_rec_base_t)(v & xfs_mask64lo(21)); | |
1da177e4 LT |
287 | } |
288 | ||
289 | /* | |
290 | * Set the startblock field in a bmap extent record. | |
291 | */ | |
292 | void | |
293 | xfs_bmbt_set_startblock( | |
a6f64d4a | 294 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
295 | xfs_fsblock_t v) |
296 | { | |
fb82557f ES |
297 | ASSERT((v & xfs_mask64hi(12)) == 0); |
298 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64hi(55)) | | |
1da177e4 | 299 | (xfs_bmbt_rec_base_t)(v >> 43); |
fb82557f | 300 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)) | |
1da177e4 | 301 | (xfs_bmbt_rec_base_t)(v << 21); |
1da177e4 LT |
302 | } |
303 | ||
304 | /* | |
305 | * Set the startoff field in a bmap extent record. | |
306 | */ | |
307 | void | |
308 | xfs_bmbt_set_startoff( | |
a6f64d4a | 309 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
310 | xfs_fileoff_t v) |
311 | { | |
fb82557f ES |
312 | ASSERT((v & xfs_mask64hi(9)) == 0); |
313 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) xfs_mask64hi(1)) | | |
1da177e4 | 314 | ((xfs_bmbt_rec_base_t)v << 9) | |
fb82557f | 315 | (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64lo(9)); |
1da177e4 LT |
316 | } |
317 | ||
318 | /* | |
319 | * Set the extent state field in a bmap extent record. | |
320 | */ | |
321 | void | |
322 | xfs_bmbt_set_state( | |
a6f64d4a | 323 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
324 | xfs_exntst_t v) |
325 | { | |
326 | ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN); | |
327 | if (v == XFS_EXT_NORM) | |
fb82557f | 328 | r->l0 &= xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN); |
1da177e4 | 329 | else |
fb82557f | 330 | r->l0 |= xfs_mask64hi(BMBT_EXNTFLAG_BITLEN); |
1da177e4 LT |
331 | } |
332 | ||
333 | /* | |
334 | * Convert in-memory form of btree root to on-disk form. | |
335 | */ | |
336 | void | |
337 | xfs_bmbt_to_bmdr( | |
60197e8d | 338 | struct xfs_mount *mp, |
7cc95a82 | 339 | struct xfs_btree_block *rblock, |
1da177e4 LT |
340 | int rblocklen, |
341 | xfs_bmdr_block_t *dblock, | |
342 | int dblocklen) | |
343 | { | |
344 | int dmxr; | |
345 | xfs_bmbt_key_t *fkp; | |
576039cf | 346 | __be64 *fpp; |
1da177e4 | 347 | xfs_bmbt_key_t *tkp; |
576039cf | 348 | __be64 *tpp; |
1da177e4 | 349 | |
ee1a47ab CH |
350 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
351 | ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_CRC_MAGIC)); | |
ce748eaa ES |
352 | ASSERT(uuid_equal(&rblock->bb_u.l.bb_uuid, |
353 | &mp->m_sb.sb_meta_uuid)); | |
ee1a47ab CH |
354 | ASSERT(rblock->bb_u.l.bb_blkno == |
355 | cpu_to_be64(XFS_BUF_DADDR_NULL)); | |
356 | } else | |
357 | ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_MAGIC)); | |
d5cf09ba CH |
358 | ASSERT(rblock->bb_u.l.bb_leftsib == cpu_to_be64(NULLFSBLOCK)); |
359 | ASSERT(rblock->bb_u.l.bb_rightsib == cpu_to_be64(NULLFSBLOCK)); | |
69ef921b | 360 | ASSERT(rblock->bb_level != 0); |
16259e7d CH |
361 | dblock->bb_level = rblock->bb_level; |
362 | dblock->bb_numrecs = rblock->bb_numrecs; | |
152d93b7 | 363 | dmxr = xfs_bmdr_maxrecs(dblocklen, 0); |
136341b4 CH |
364 | fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); |
365 | tkp = XFS_BMDR_KEY_ADDR(dblock, 1); | |
60197e8d | 366 | fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
136341b4 | 367 | tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); |
16259e7d | 368 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
1da177e4 | 369 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
576039cf | 370 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
1da177e4 LT |
371 | } |
372 | ||
1da177e4 | 373 | /* |
4eea22f0 | 374 | * Check extent records, which have just been read, for |
1da177e4 LT |
375 | * any bit in the extent flag field. ASSERT on debug |
376 | * kernels, as this condition should not occur. | |
377 | * Return an error condition (1) if any flags found, | |
378 | * otherwise return 0. | |
379 | */ | |
380 | ||
381 | int | |
382 | xfs_check_nostate_extents( | |
4eea22f0 MK |
383 | xfs_ifork_t *ifp, |
384 | xfs_extnum_t idx, | |
1da177e4 LT |
385 | xfs_extnum_t num) |
386 | { | |
4eea22f0 | 387 | for (; num > 0; num--, idx++) { |
a6f64d4a | 388 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); |
1da177e4 LT |
389 | if ((ep->l0 >> |
390 | (64 - BMBT_EXNTFLAG_BITLEN)) != 0) { | |
391 | ASSERT(0); | |
392 | return 1; | |
393 | } | |
394 | } | |
395 | return 0; | |
396 | } | |
561f7d17 CH |
397 | |
398 | ||
399 | STATIC struct xfs_btree_cur * | |
400 | xfs_bmbt_dup_cursor( | |
401 | struct xfs_btree_cur *cur) | |
402 | { | |
403 | struct xfs_btree_cur *new; | |
404 | ||
405 | new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp, | |
406 | cur->bc_private.b.ip, cur->bc_private.b.whichfork); | |
407 | ||
408 | /* | |
409 | * Copy the firstblock, flist, and flags values, | |
410 | * since init cursor doesn't get them. | |
411 | */ | |
412 | new->bc_private.b.firstblock = cur->bc_private.b.firstblock; | |
413 | new->bc_private.b.flist = cur->bc_private.b.flist; | |
414 | new->bc_private.b.flags = cur->bc_private.b.flags; | |
415 | ||
416 | return new; | |
417 | } | |
418 | ||
4b22a571 CH |
419 | STATIC void |
420 | xfs_bmbt_update_cursor( | |
421 | struct xfs_btree_cur *src, | |
422 | struct xfs_btree_cur *dst) | |
423 | { | |
424 | ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || | |
425 | (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); | |
426 | ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist); | |
427 | ||
428 | dst->bc_private.b.allocated += src->bc_private.b.allocated; | |
429 | dst->bc_private.b.firstblock = src->bc_private.b.firstblock; | |
430 | ||
431 | src->bc_private.b.allocated = 0; | |
432 | } | |
433 | ||
f5eb8e7c CH |
434 | STATIC int |
435 | xfs_bmbt_alloc_block( | |
436 | struct xfs_btree_cur *cur, | |
437 | union xfs_btree_ptr *start, | |
438 | union xfs_btree_ptr *new, | |
f5eb8e7c CH |
439 | int *stat) |
440 | { | |
441 | xfs_alloc_arg_t args; /* block allocation args */ | |
442 | int error; /* error return value */ | |
443 | ||
444 | memset(&args, 0, sizeof(args)); | |
445 | args.tp = cur->bc_tp; | |
446 | args.mp = cur->bc_mp; | |
447 | args.fsbno = cur->bc_private.b.firstblock; | |
448 | args.firstblock = args.fsbno; | |
449 | ||
450 | if (args.fsbno == NULLFSBLOCK) { | |
451 | args.fsbno = be64_to_cpu(start->l); | |
452 | args.type = XFS_ALLOCTYPE_START_BNO; | |
453 | /* | |
454 | * Make sure there is sufficient room left in the AG to | |
455 | * complete a full tree split for an extent insert. If | |
456 | * we are converting the middle part of an extent then | |
457 | * we may need space for two tree splits. | |
458 | * | |
459 | * We are relying on the caller to make the correct block | |
460 | * reservation for this operation to succeed. If the | |
461 | * reservation amount is insufficient then we may fail a | |
462 | * block allocation here and corrupt the filesystem. | |
463 | */ | |
464 | args.minleft = xfs_trans_get_block_res(args.tp); | |
465 | } else if (cur->bc_private.b.flist->xbf_low) { | |
466 | args.type = XFS_ALLOCTYPE_START_BNO; | |
467 | } else { | |
468 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
469 | } | |
470 | ||
471 | args.minlen = args.maxlen = args.prod = 1; | |
472 | args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL; | |
473 | if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) { | |
2451337d | 474 | error = -ENOSPC; |
f5eb8e7c CH |
475 | goto error0; |
476 | } | |
477 | error = xfs_alloc_vextent(&args); | |
478 | if (error) | |
479 | goto error0; | |
480 | ||
481 | if (args.fsbno == NULLFSBLOCK && args.minleft) { | |
482 | /* | |
483 | * Could not find an AG with enough free space to satisfy | |
484 | * a full btree split. Try again without minleft and if | |
485 | * successful activate the lowspace algorithm. | |
486 | */ | |
487 | args.fsbno = 0; | |
488 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
489 | args.minleft = 0; | |
490 | error = xfs_alloc_vextent(&args); | |
491 | if (error) | |
492 | goto error0; | |
493 | cur->bc_private.b.flist->xbf_low = 1; | |
494 | } | |
495 | if (args.fsbno == NULLFSBLOCK) { | |
496 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
497 | *stat = 0; | |
498 | return 0; | |
499 | } | |
500 | ASSERT(args.len == 1); | |
501 | cur->bc_private.b.firstblock = args.fsbno; | |
502 | cur->bc_private.b.allocated++; | |
503 | cur->bc_private.b.ip->i_d.di_nblocks++; | |
504 | xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE); | |
7d095257 | 505 | xfs_trans_mod_dquot_byino(args.tp, cur->bc_private.b.ip, |
f5eb8e7c CH |
506 | XFS_TRANS_DQ_BCOUNT, 1L); |
507 | ||
508 | new->l = cpu_to_be64(args.fsbno); | |
509 | ||
510 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
511 | *stat = 1; | |
512 | return 0; | |
513 | ||
514 | error0: | |
515 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); | |
516 | return error; | |
517 | } | |
518 | ||
d4b3a4b7 CH |
519 | STATIC int |
520 | xfs_bmbt_free_block( | |
521 | struct xfs_btree_cur *cur, | |
522 | struct xfs_buf *bp) | |
523 | { | |
524 | struct xfs_mount *mp = cur->bc_mp; | |
525 | struct xfs_inode *ip = cur->bc_private.b.ip; | |
526 | struct xfs_trans *tp = cur->bc_tp; | |
527 | xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); | |
528 | ||
529 | xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp); | |
530 | ip->i_d.di_nblocks--; | |
531 | ||
532 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
7d095257 | 533 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); |
d4b3a4b7 CH |
534 | xfs_trans_binval(tp, bp); |
535 | return 0; | |
536 | } | |
537 | ||
91cca5df CH |
538 | STATIC int |
539 | xfs_bmbt_get_minrecs( | |
540 | struct xfs_btree_cur *cur, | |
541 | int level) | |
542 | { | |
60197e8d CH |
543 | if (level == cur->bc_nlevels - 1) { |
544 | struct xfs_ifork *ifp; | |
545 | ||
546 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
547 | cur->bc_private.b.whichfork); | |
548 | ||
549 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
550 | ifp->if_broot_bytes, level == 0) / 2; | |
551 | } | |
552 | ||
553 | return cur->bc_mp->m_bmap_dmnr[level != 0]; | |
91cca5df CH |
554 | } |
555 | ||
60197e8d | 556 | int |
ce5e42db CH |
557 | xfs_bmbt_get_maxrecs( |
558 | struct xfs_btree_cur *cur, | |
559 | int level) | |
560 | { | |
60197e8d CH |
561 | if (level == cur->bc_nlevels - 1) { |
562 | struct xfs_ifork *ifp; | |
563 | ||
564 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
565 | cur->bc_private.b.whichfork); | |
566 | ||
567 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
568 | ifp->if_broot_bytes, level == 0); | |
569 | } | |
570 | ||
571 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
572 | ||
ce5e42db CH |
573 | } |
574 | ||
4b22a571 CH |
575 | /* |
576 | * Get the maximum records we could store in the on-disk format. | |
577 | * | |
578 | * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but | |
579 | * for the root node this checks the available space in the dinode fork | |
580 | * so that we can resize the in-memory buffer to match it. After a | |
581 | * resize to the maximum size this function returns the same value | |
582 | * as xfs_bmbt_get_maxrecs for the root node, too. | |
583 | */ | |
584 | STATIC int | |
585 | xfs_bmbt_get_dmaxrecs( | |
586 | struct xfs_btree_cur *cur, | |
587 | int level) | |
588 | { | |
60197e8d CH |
589 | if (level != cur->bc_nlevels - 1) |
590 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
152d93b7 | 591 | return xfs_bmdr_maxrecs(cur->bc_private.b.forksize, level == 0); |
4b22a571 CH |
592 | } |
593 | ||
fe033cc8 CH |
594 | STATIC void |
595 | xfs_bmbt_init_key_from_rec( | |
596 | union xfs_btree_key *key, | |
597 | union xfs_btree_rec *rec) | |
598 | { | |
599 | key->bmbt.br_startoff = | |
600 | cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); | |
601 | } | |
602 | ||
4b22a571 CH |
603 | STATIC void |
604 | xfs_bmbt_init_rec_from_key( | |
605 | union xfs_btree_key *key, | |
606 | union xfs_btree_rec *rec) | |
607 | { | |
608 | ASSERT(key->bmbt.br_startoff != 0); | |
609 | ||
610 | xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff), | |
611 | 0, 0, XFS_EXT_NORM); | |
612 | } | |
613 | ||
614 | STATIC void | |
615 | xfs_bmbt_init_rec_from_cur( | |
616 | struct xfs_btree_cur *cur, | |
617 | union xfs_btree_rec *rec) | |
618 | { | |
619 | xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b); | |
620 | } | |
621 | ||
fe033cc8 CH |
622 | STATIC void |
623 | xfs_bmbt_init_ptr_from_cur( | |
624 | struct xfs_btree_cur *cur, | |
625 | union xfs_btree_ptr *ptr) | |
626 | { | |
627 | ptr->l = 0; | |
628 | } | |
629 | ||
630 | STATIC __int64_t | |
631 | xfs_bmbt_key_diff( | |
632 | struct xfs_btree_cur *cur, | |
633 | union xfs_btree_key *key) | |
634 | { | |
635 | return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) - | |
636 | cur->bc_rec.b.br_startoff; | |
637 | } | |
638 | ||
c5c249b4 | 639 | static bool |
612cfbfe | 640 | xfs_bmbt_verify( |
3d3e6f64 DC |
641 | struct xfs_buf *bp) |
642 | { | |
643 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
644 | struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); | |
645 | unsigned int level; | |
3d3e6f64 | 646 | |
ee1a47ab CH |
647 | switch (block->bb_magic) { |
648 | case cpu_to_be32(XFS_BMAP_CRC_MAGIC): | |
649 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
650 | return false; | |
ce748eaa | 651 | if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_meta_uuid)) |
ee1a47ab CH |
652 | return false; |
653 | if (be64_to_cpu(block->bb_u.l.bb_blkno) != bp->b_bn) | |
654 | return false; | |
655 | /* | |
656 | * XXX: need a better way of verifying the owner here. Right now | |
657 | * just make sure there has been one set. | |
658 | */ | |
659 | if (be64_to_cpu(block->bb_u.l.bb_owner) == 0) | |
660 | return false; | |
661 | /* fall through */ | |
662 | case cpu_to_be32(XFS_BMAP_MAGIC): | |
663 | break; | |
664 | default: | |
665 | return false; | |
666 | } | |
667 | ||
668 | /* | |
669 | * numrecs and level verification. | |
3d3e6f64 | 670 | * |
ee1a47ab | 671 | * We don't know what fork we belong to, so just verify that the level |
3d3e6f64 DC |
672 | * is less than the maximum of the two. Later checks will be more |
673 | * precise. | |
674 | */ | |
675 | level = be16_to_cpu(block->bb_level); | |
ee1a47ab CH |
676 | if (level > max(mp->m_bm_maxlevels[0], mp->m_bm_maxlevels[1])) |
677 | return false; | |
678 | if (be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0]) | |
679 | return false; | |
3d3e6f64 DC |
680 | |
681 | /* sibling pointer verification */ | |
ee1a47ab | 682 | if (!block->bb_u.l.bb_leftsib || |
d5cf09ba | 683 | (block->bb_u.l.bb_leftsib != cpu_to_be64(NULLFSBLOCK) && |
ee1a47ab CH |
684 | !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_leftsib)))) |
685 | return false; | |
686 | if (!block->bb_u.l.bb_rightsib || | |
d5cf09ba | 687 | (block->bb_u.l.bb_rightsib != cpu_to_be64(NULLFSBLOCK) && |
ee1a47ab CH |
688 | !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_rightsib)))) |
689 | return false; | |
690 | ||
691 | return true; | |
612cfbfe | 692 | } |
3d3e6f64 | 693 | |
1813dd64 DC |
694 | static void |
695 | xfs_bmbt_read_verify( | |
612cfbfe DC |
696 | struct xfs_buf *bp) |
697 | { | |
ce5028cf | 698 | if (!xfs_btree_lblock_verify_crc(bp)) |
2451337d | 699 | xfs_buf_ioerror(bp, -EFSBADCRC); |
ce5028cf | 700 | else if (!xfs_bmbt_verify(bp)) |
2451337d | 701 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
ce5028cf ES |
702 | |
703 | if (bp->b_error) { | |
704 | trace_xfs_btree_corrupt(bp, _RET_IP_); | |
705 | xfs_verifier_error(bp); | |
ee1a47ab | 706 | } |
612cfbfe DC |
707 | } |
708 | ||
1813dd64 DC |
709 | static void |
710 | xfs_bmbt_write_verify( | |
612cfbfe DC |
711 | struct xfs_buf *bp) |
712 | { | |
ee1a47ab | 713 | if (!xfs_bmbt_verify(bp)) { |
ee1a47ab | 714 | trace_xfs_btree_corrupt(bp, _RET_IP_); |
2451337d | 715 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
ce5028cf | 716 | xfs_verifier_error(bp); |
ee1a47ab CH |
717 | return; |
718 | } | |
719 | xfs_btree_lblock_calc_crc(bp); | |
3d3e6f64 DC |
720 | } |
721 | ||
1813dd64 | 722 | const struct xfs_buf_ops xfs_bmbt_buf_ops = { |
233135b7 | 723 | .name = "xfs_bmbt", |
1813dd64 DC |
724 | .verify_read = xfs_bmbt_read_verify, |
725 | .verify_write = xfs_bmbt_write_verify, | |
726 | }; | |
727 | ||
728 | ||
742ae1e3 | 729 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
730 | STATIC int |
731 | xfs_bmbt_keys_inorder( | |
732 | struct xfs_btree_cur *cur, | |
733 | union xfs_btree_key *k1, | |
734 | union xfs_btree_key *k2) | |
735 | { | |
736 | return be64_to_cpu(k1->bmbt.br_startoff) < | |
737 | be64_to_cpu(k2->bmbt.br_startoff); | |
738 | } | |
739 | ||
740 | STATIC int | |
741 | xfs_bmbt_recs_inorder( | |
742 | struct xfs_btree_cur *cur, | |
743 | union xfs_btree_rec *r1, | |
744 | union xfs_btree_rec *r2) | |
745 | { | |
746 | return xfs_bmbt_disk_get_startoff(&r1->bmbt) + | |
747 | xfs_bmbt_disk_get_blockcount(&r1->bmbt) <= | |
748 | xfs_bmbt_disk_get_startoff(&r2->bmbt); | |
749 | } | |
750 | #endif /* DEBUG */ | |
751 | ||
561f7d17 | 752 | static const struct xfs_btree_ops xfs_bmbt_ops = { |
65f1eaea CH |
753 | .rec_len = sizeof(xfs_bmbt_rec_t), |
754 | .key_len = sizeof(xfs_bmbt_key_t), | |
755 | ||
561f7d17 | 756 | .dup_cursor = xfs_bmbt_dup_cursor, |
4b22a571 | 757 | .update_cursor = xfs_bmbt_update_cursor, |
f5eb8e7c | 758 | .alloc_block = xfs_bmbt_alloc_block, |
d4b3a4b7 | 759 | .free_block = xfs_bmbt_free_block, |
ce5e42db | 760 | .get_maxrecs = xfs_bmbt_get_maxrecs, |
91cca5df | 761 | .get_minrecs = xfs_bmbt_get_minrecs, |
4b22a571 | 762 | .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, |
fe033cc8 | 763 | .init_key_from_rec = xfs_bmbt_init_key_from_rec, |
4b22a571 CH |
764 | .init_rec_from_key = xfs_bmbt_init_rec_from_key, |
765 | .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, | |
fe033cc8 CH |
766 | .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, |
767 | .key_diff = xfs_bmbt_key_diff, | |
1813dd64 | 768 | .buf_ops = &xfs_bmbt_buf_ops, |
742ae1e3 | 769 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
770 | .keys_inorder = xfs_bmbt_keys_inorder, |
771 | .recs_inorder = xfs_bmbt_recs_inorder, | |
772 | #endif | |
561f7d17 CH |
773 | }; |
774 | ||
775 | /* | |
776 | * Allocate a new bmap btree cursor. | |
777 | */ | |
778 | struct xfs_btree_cur * /* new bmap btree cursor */ | |
779 | xfs_bmbt_init_cursor( | |
780 | struct xfs_mount *mp, /* file system mount point */ | |
781 | struct xfs_trans *tp, /* transaction pointer */ | |
782 | struct xfs_inode *ip, /* inode owning the btree */ | |
783 | int whichfork) /* data or attr fork */ | |
784 | { | |
785 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
786 | struct xfs_btree_cur *cur; | |
787 | ||
788 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); | |
789 | ||
790 | cur->bc_tp = tp; | |
791 | cur->bc_mp = mp; | |
792 | cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
793 | cur->bc_btnum = XFS_BTNUM_BMAP; | |
794 | cur->bc_blocklog = mp->m_sb.sb_blocklog; | |
795 | ||
796 | cur->bc_ops = &xfs_bmbt_ops; | |
e99ab90d | 797 | cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE; |
ee1a47ab CH |
798 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
799 | cur->bc_flags |= XFS_BTREE_CRC_BLOCKS; | |
561f7d17 CH |
800 | |
801 | cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork); | |
802 | cur->bc_private.b.ip = ip; | |
803 | cur->bc_private.b.firstblock = NULLFSBLOCK; | |
804 | cur->bc_private.b.flist = NULL; | |
805 | cur->bc_private.b.allocated = 0; | |
806 | cur->bc_private.b.flags = 0; | |
807 | cur->bc_private.b.whichfork = whichfork; | |
808 | ||
809 | return cur; | |
810 | } | |
60197e8d CH |
811 | |
812 | /* | |
813 | * Calculate number of records in a bmap btree block. | |
814 | */ | |
815 | int | |
816 | xfs_bmbt_maxrecs( | |
817 | struct xfs_mount *mp, | |
818 | int blocklen, | |
819 | int leaf) | |
820 | { | |
7cc95a82 | 821 | blocklen -= XFS_BMBT_BLOCK_LEN(mp); |
60197e8d CH |
822 | |
823 | if (leaf) | |
824 | return blocklen / sizeof(xfs_bmbt_rec_t); | |
825 | return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)); | |
826 | } | |
827 | ||
828 | /* | |
829 | * Calculate number of records in a bmap btree inode root. | |
830 | */ | |
831 | int | |
832 | xfs_bmdr_maxrecs( | |
60197e8d CH |
833 | int blocklen, |
834 | int leaf) | |
835 | { | |
836 | blocklen -= sizeof(xfs_bmdr_block_t); | |
837 | ||
838 | if (leaf) | |
839 | return blocklen / sizeof(xfs_bmdr_rec_t); | |
840 | return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t)); | |
841 | } | |
21b5c978 DC |
842 | |
843 | /* | |
844 | * Change the owner of a btree format fork fo the inode passed in. Change it to | |
845 | * the owner of that is passed in so that we can change owners before or after | |
846 | * we switch forks between inodes. The operation that the caller is doing will | |
847 | * determine whether is needs to change owner before or after the switch. | |
848 | * | |
638f4416 DC |
849 | * For demand paged transactional modification, the fork switch should be done |
850 | * after reading in all the blocks, modifying them and pinning them in the | |
851 | * transaction. For modification when the buffers are already pinned in memory, | |
852 | * the fork switch can be done before changing the owner as we won't need to | |
853 | * validate the owner until the btree buffers are unpinned and writes can occur | |
854 | * again. | |
855 | * | |
856 | * For recovery based ownership change, there is no transactional context and | |
857 | * so a buffer list must be supplied so that we can record the buffers that we | |
858 | * modified for the caller to issue IO on. | |
21b5c978 DC |
859 | */ |
860 | int | |
861 | xfs_bmbt_change_owner( | |
862 | struct xfs_trans *tp, | |
863 | struct xfs_inode *ip, | |
864 | int whichfork, | |
638f4416 DC |
865 | xfs_ino_t new_owner, |
866 | struct list_head *buffer_list) | |
21b5c978 DC |
867 | { |
868 | struct xfs_btree_cur *cur; | |
869 | int error; | |
870 | ||
638f4416 DC |
871 | ASSERT(tp || buffer_list); |
872 | ASSERT(!(tp && buffer_list)); | |
21b5c978 | 873 | if (whichfork == XFS_DATA_FORK) |
aa9e1040 | 874 | ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_BTREE); |
21b5c978 | 875 | else |
aa9e1040 | 876 | ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_BTREE); |
21b5c978 DC |
877 | |
878 | cur = xfs_bmbt_init_cursor(ip->i_mount, tp, ip, whichfork); | |
638f4416 | 879 | if (!cur) |
2451337d | 880 | return -ENOMEM; |
638f4416 DC |
881 | |
882 | error = xfs_btree_change_owner(cur, new_owner, buffer_list); | |
21b5c978 DC |
883 | xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); |
884 | return error; | |
885 | } |