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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" |
3ab78df2 | 26 | #include "xfs_defer.h" |
1da177e4 | 27 | #include "xfs_inode.h" |
239880ef | 28 | #include "xfs_trans.h" |
a844f451 | 29 | #include "xfs_inode_item.h" |
1da177e4 | 30 | #include "xfs_alloc.h" |
a844f451 | 31 | #include "xfs_btree.h" |
a4fbe6ab | 32 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
33 | #include "xfs_bmap.h" |
34 | #include "xfs_error.h" | |
35 | #include "xfs_quota.h" | |
3d3e6f64 | 36 | #include "xfs_trace.h" |
ee1a47ab | 37 | #include "xfs_cksum.h" |
340785cc | 38 | #include "xfs_rmap.h" |
1da177e4 | 39 | |
1da177e4 LT |
40 | /* |
41 | * Determine the extent state. | |
42 | */ | |
43 | /* ARGSUSED */ | |
44 | STATIC xfs_exntst_t | |
45 | xfs_extent_state( | |
46 | xfs_filblks_t blks, | |
47 | int extent_flag) | |
48 | { | |
49 | if (extent_flag) { | |
50 | ASSERT(blks != 0); /* saved for DMIG */ | |
51 | return XFS_EXT_UNWRITTEN; | |
52 | } | |
53 | return XFS_EXT_NORM; | |
54 | } | |
55 | ||
1da177e4 LT |
56 | /* |
57 | * Convert on-disk form of btree root to in-memory form. | |
58 | */ | |
59 | void | |
60 | xfs_bmdr_to_bmbt( | |
ee1a47ab | 61 | struct xfs_inode *ip, |
1da177e4 LT |
62 | xfs_bmdr_block_t *dblock, |
63 | int dblocklen, | |
7cc95a82 | 64 | struct xfs_btree_block *rblock, |
1da177e4 LT |
65 | int rblocklen) |
66 | { | |
ee1a47ab | 67 | struct xfs_mount *mp = ip->i_mount; |
1da177e4 LT |
68 | int dmxr; |
69 | xfs_bmbt_key_t *fkp; | |
576039cf | 70 | __be64 *fpp; |
1da177e4 | 71 | xfs_bmbt_key_t *tkp; |
576039cf | 72 | __be64 *tpp; |
1da177e4 | 73 | |
ee1a47ab CH |
74 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
75 | xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL, | |
76 | XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino, | |
77 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
78 | else | |
79 | xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL, | |
80 | XFS_BMAP_MAGIC, 0, 0, ip->i_ino, | |
81 | XFS_BTREE_LONG_PTRS); | |
82 | ||
16259e7d CH |
83 | rblock->bb_level = dblock->bb_level; |
84 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); | |
85 | rblock->bb_numrecs = dblock->bb_numrecs; | |
152d93b7 | 86 | dmxr = xfs_bmdr_maxrecs(dblocklen, 0); |
136341b4 CH |
87 | fkp = XFS_BMDR_KEY_ADDR(dblock, 1); |
88 | tkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); | |
89 | fpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); | |
60197e8d | 90 | tpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
16259e7d | 91 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
1da177e4 | 92 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
576039cf | 93 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
1da177e4 LT |
94 | } |
95 | ||
1da177e4 LT |
96 | /* |
97 | * Convert a compressed bmap extent record to an uncompressed form. | |
98 | * This code must be in sync with the routines xfs_bmbt_get_startoff, | |
99 | * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state. | |
100 | */ | |
b8f82a4a | 101 | STATIC void |
1da177e4 LT |
102 | __xfs_bmbt_get_all( |
103 | __uint64_t l0, | |
104 | __uint64_t l1, | |
105 | xfs_bmbt_irec_t *s) | |
106 | { | |
107 | int ext_flag; | |
108 | xfs_exntst_t st; | |
109 | ||
110 | ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
111 | s->br_startoff = ((xfs_fileoff_t)l0 & | |
fb82557f | 112 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
fb82557f | 113 | s->br_startblock = (((xfs_fsblock_t)l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 | 114 | (((xfs_fsblock_t)l1) >> 21); |
fb82557f | 115 | s->br_blockcount = (xfs_filblks_t)(l1 & xfs_mask64lo(21)); |
1da177e4 LT |
116 | /* This is xfs_extent_state() in-line */ |
117 | if (ext_flag) { | |
118 | ASSERT(s->br_blockcount != 0); /* saved for DMIG */ | |
119 | st = XFS_EXT_UNWRITTEN; | |
120 | } else | |
121 | st = XFS_EXT_NORM; | |
122 | s->br_state = st; | |
123 | } | |
124 | ||
125 | void | |
126 | xfs_bmbt_get_all( | |
a6f64d4a | 127 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
128 | xfs_bmbt_irec_t *s) |
129 | { | |
130 | __xfs_bmbt_get_all(r->l0, r->l1, s); | |
131 | } | |
132 | ||
1da177e4 LT |
133 | /* |
134 | * Extract the blockcount field from an in memory bmap extent record. | |
135 | */ | |
136 | xfs_filblks_t | |
137 | xfs_bmbt_get_blockcount( | |
a6f64d4a | 138 | xfs_bmbt_rec_host_t *r) |
1da177e4 | 139 | { |
fb82557f | 140 | return (xfs_filblks_t)(r->l1 & xfs_mask64lo(21)); |
1da177e4 LT |
141 | } |
142 | ||
143 | /* | |
144 | * Extract the startblock field from an in memory bmap extent record. | |
145 | */ | |
146 | xfs_fsblock_t | |
147 | xfs_bmbt_get_startblock( | |
a6f64d4a | 148 | xfs_bmbt_rec_host_t *r) |
1da177e4 | 149 | { |
fb82557f | 150 | return (((xfs_fsblock_t)r->l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 | 151 | (((xfs_fsblock_t)r->l1) >> 21); |
1da177e4 LT |
152 | } |
153 | ||
154 | /* | |
155 | * Extract the startoff field from an in memory bmap extent record. | |
156 | */ | |
157 | xfs_fileoff_t | |
158 | xfs_bmbt_get_startoff( | |
a6f64d4a | 159 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
160 | { |
161 | return ((xfs_fileoff_t)r->l0 & | |
fb82557f | 162 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 LT |
163 | } |
164 | ||
165 | xfs_exntst_t | |
166 | xfs_bmbt_get_state( | |
a6f64d4a | 167 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
168 | { |
169 | int ext_flag; | |
170 | ||
171 | ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
172 | return xfs_extent_state(xfs_bmbt_get_blockcount(r), | |
173 | ext_flag); | |
174 | } | |
175 | ||
1da177e4 LT |
176 | /* |
177 | * Extract the blockcount field from an on disk bmap extent record. | |
178 | */ | |
179 | xfs_filblks_t | |
180 | xfs_bmbt_disk_get_blockcount( | |
181 | xfs_bmbt_rec_t *r) | |
182 | { | |
fb82557f | 183 | return (xfs_filblks_t)(be64_to_cpu(r->l1) & xfs_mask64lo(21)); |
1da177e4 LT |
184 | } |
185 | ||
1da177e4 LT |
186 | /* |
187 | * Extract the startoff field from a disk format bmap extent record. | |
188 | */ | |
189 | xfs_fileoff_t | |
190 | xfs_bmbt_disk_get_startoff( | |
191 | xfs_bmbt_rec_t *r) | |
192 | { | |
cd8b0a97 | 193 | return ((xfs_fileoff_t)be64_to_cpu(r->l0) & |
fb82557f | 194 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 | 195 | } |
1da177e4 | 196 | |
1da177e4 | 197 | |
1da177e4 LT |
198 | /* |
199 | * Set all the fields in a bmap extent record from the arguments. | |
200 | */ | |
201 | void | |
202 | xfs_bmbt_set_allf( | |
8cba4344 CH |
203 | xfs_bmbt_rec_host_t *r, |
204 | xfs_fileoff_t startoff, | |
205 | xfs_fsblock_t startblock, | |
206 | xfs_filblks_t blockcount, | |
207 | xfs_exntst_t state) | |
1da177e4 | 208 | { |
8cba4344 CH |
209 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
210 | ||
211 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
fb82557f ES |
212 | ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); |
213 | ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
1da177e4 | 214 | |
fb82557f | 215 | ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
8cba4344 | 216 | |
1da177e4 | 217 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
8cba4344 CH |
218 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
219 | ((xfs_bmbt_rec_base_t)startblock >> 43); | |
220 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
221 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 222 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 LT |
223 | } |
224 | ||
1da177e4 LT |
225 | /* |
226 | * Set all the fields in a bmap extent record from the uncompressed form. | |
227 | */ | |
228 | void | |
8cba4344 CH |
229 | xfs_bmbt_set_all( |
230 | xfs_bmbt_rec_host_t *r, | |
231 | xfs_bmbt_irec_t *s) | |
1da177e4 | 232 | { |
8cba4344 CH |
233 | xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock, |
234 | s->br_blockcount, s->br_state); | |
1da177e4 LT |
235 | } |
236 | ||
8cba4344 | 237 | |
1da177e4 LT |
238 | /* |
239 | * Set all the fields in a disk format bmap extent record from the arguments. | |
240 | */ | |
241 | void | |
242 | xfs_bmbt_disk_set_allf( | |
8cba4344 CH |
243 | xfs_bmbt_rec_t *r, |
244 | xfs_fileoff_t startoff, | |
245 | xfs_fsblock_t startblock, | |
246 | xfs_filblks_t blockcount, | |
247 | xfs_exntst_t state) | |
1da177e4 | 248 | { |
8cba4344 CH |
249 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
250 | ||
251 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
fb82557f ES |
252 | ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); |
253 | ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
fb82557f | 254 | ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
8cba4344 | 255 | |
cd8b0a97 | 256 | r->l0 = cpu_to_be64( |
8cba4344 CH |
257 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
258 | ((xfs_bmbt_rec_base_t)startoff << 9) | | |
259 | ((xfs_bmbt_rec_base_t)startblock >> 43)); | |
cd8b0a97 | 260 | r->l1 = cpu_to_be64( |
8cba4344 CH |
261 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
262 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 263 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21))); |
1da177e4 | 264 | } |
8cba4344 CH |
265 | |
266 | /* | |
267 | * Set all the fields in a bmap extent record from the uncompressed form. | |
268 | */ | |
5d77c0dc | 269 | STATIC void |
8cba4344 CH |
270 | xfs_bmbt_disk_set_all( |
271 | xfs_bmbt_rec_t *r, | |
272 | xfs_bmbt_irec_t *s) | |
273 | { | |
274 | xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock, | |
275 | s->br_blockcount, s->br_state); | |
276 | } | |
1da177e4 LT |
277 | |
278 | /* | |
279 | * Set the blockcount field in a bmap extent record. | |
280 | */ | |
281 | void | |
282 | xfs_bmbt_set_blockcount( | |
a6f64d4a | 283 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
284 | xfs_filblks_t v) |
285 | { | |
fb82557f ES |
286 | ASSERT((v & xfs_mask64hi(43)) == 0); |
287 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64hi(43)) | | |
288 | (xfs_bmbt_rec_base_t)(v & xfs_mask64lo(21)); | |
1da177e4 LT |
289 | } |
290 | ||
291 | /* | |
292 | * Set the startblock field in a bmap extent record. | |
293 | */ | |
294 | void | |
295 | xfs_bmbt_set_startblock( | |
a6f64d4a | 296 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
297 | xfs_fsblock_t v) |
298 | { | |
fb82557f ES |
299 | ASSERT((v & xfs_mask64hi(12)) == 0); |
300 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64hi(55)) | | |
1da177e4 | 301 | (xfs_bmbt_rec_base_t)(v >> 43); |
fb82557f | 302 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)) | |
1da177e4 | 303 | (xfs_bmbt_rec_base_t)(v << 21); |
1da177e4 LT |
304 | } |
305 | ||
306 | /* | |
307 | * Set the startoff field in a bmap extent record. | |
308 | */ | |
309 | void | |
310 | xfs_bmbt_set_startoff( | |
a6f64d4a | 311 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
312 | xfs_fileoff_t v) |
313 | { | |
fb82557f ES |
314 | ASSERT((v & xfs_mask64hi(9)) == 0); |
315 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) xfs_mask64hi(1)) | | |
1da177e4 | 316 | ((xfs_bmbt_rec_base_t)v << 9) | |
fb82557f | 317 | (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64lo(9)); |
1da177e4 LT |
318 | } |
319 | ||
320 | /* | |
321 | * Set the extent state field in a bmap extent record. | |
322 | */ | |
323 | void | |
324 | xfs_bmbt_set_state( | |
a6f64d4a | 325 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
326 | xfs_exntst_t v) |
327 | { | |
328 | ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN); | |
329 | if (v == XFS_EXT_NORM) | |
fb82557f | 330 | r->l0 &= xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN); |
1da177e4 | 331 | else |
fb82557f | 332 | r->l0 |= xfs_mask64hi(BMBT_EXNTFLAG_BITLEN); |
1da177e4 LT |
333 | } |
334 | ||
335 | /* | |
336 | * Convert in-memory form of btree root to on-disk form. | |
337 | */ | |
338 | void | |
339 | xfs_bmbt_to_bmdr( | |
60197e8d | 340 | struct xfs_mount *mp, |
7cc95a82 | 341 | struct xfs_btree_block *rblock, |
1da177e4 LT |
342 | int rblocklen, |
343 | xfs_bmdr_block_t *dblock, | |
344 | int dblocklen) | |
345 | { | |
346 | int dmxr; | |
347 | xfs_bmbt_key_t *fkp; | |
576039cf | 348 | __be64 *fpp; |
1da177e4 | 349 | xfs_bmbt_key_t *tkp; |
576039cf | 350 | __be64 *tpp; |
1da177e4 | 351 | |
ee1a47ab CH |
352 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
353 | ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_CRC_MAGIC)); | |
ce748eaa ES |
354 | ASSERT(uuid_equal(&rblock->bb_u.l.bb_uuid, |
355 | &mp->m_sb.sb_meta_uuid)); | |
ee1a47ab CH |
356 | ASSERT(rblock->bb_u.l.bb_blkno == |
357 | cpu_to_be64(XFS_BUF_DADDR_NULL)); | |
358 | } else | |
359 | ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_MAGIC)); | |
d5cf09ba CH |
360 | ASSERT(rblock->bb_u.l.bb_leftsib == cpu_to_be64(NULLFSBLOCK)); |
361 | ASSERT(rblock->bb_u.l.bb_rightsib == cpu_to_be64(NULLFSBLOCK)); | |
69ef921b | 362 | ASSERT(rblock->bb_level != 0); |
16259e7d CH |
363 | dblock->bb_level = rblock->bb_level; |
364 | dblock->bb_numrecs = rblock->bb_numrecs; | |
152d93b7 | 365 | dmxr = xfs_bmdr_maxrecs(dblocklen, 0); |
136341b4 CH |
366 | fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); |
367 | tkp = XFS_BMDR_KEY_ADDR(dblock, 1); | |
60197e8d | 368 | fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
136341b4 | 369 | tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); |
16259e7d | 370 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
1da177e4 | 371 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
576039cf | 372 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
1da177e4 LT |
373 | } |
374 | ||
1da177e4 | 375 | /* |
4eea22f0 | 376 | * Check extent records, which have just been read, for |
1da177e4 LT |
377 | * any bit in the extent flag field. ASSERT on debug |
378 | * kernels, as this condition should not occur. | |
379 | * Return an error condition (1) if any flags found, | |
380 | * otherwise return 0. | |
381 | */ | |
382 | ||
383 | int | |
384 | xfs_check_nostate_extents( | |
4eea22f0 MK |
385 | xfs_ifork_t *ifp, |
386 | xfs_extnum_t idx, | |
1da177e4 LT |
387 | xfs_extnum_t num) |
388 | { | |
4eea22f0 | 389 | for (; num > 0; num--, idx++) { |
a6f64d4a | 390 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); |
1da177e4 LT |
391 | if ((ep->l0 >> |
392 | (64 - BMBT_EXNTFLAG_BITLEN)) != 0) { | |
393 | ASSERT(0); | |
394 | return 1; | |
395 | } | |
396 | } | |
397 | return 0; | |
398 | } | |
561f7d17 CH |
399 | |
400 | ||
401 | STATIC struct xfs_btree_cur * | |
402 | xfs_bmbt_dup_cursor( | |
403 | struct xfs_btree_cur *cur) | |
404 | { | |
405 | struct xfs_btree_cur *new; | |
406 | ||
407 | new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp, | |
408 | cur->bc_private.b.ip, cur->bc_private.b.whichfork); | |
409 | ||
410 | /* | |
2c3234d1 | 411 | * Copy the firstblock, dfops, and flags values, |
561f7d17 CH |
412 | * since init cursor doesn't get them. |
413 | */ | |
414 | new->bc_private.b.firstblock = cur->bc_private.b.firstblock; | |
2c3234d1 | 415 | new->bc_private.b.dfops = cur->bc_private.b.dfops; |
561f7d17 CH |
416 | new->bc_private.b.flags = cur->bc_private.b.flags; |
417 | ||
418 | return new; | |
419 | } | |
420 | ||
4b22a571 CH |
421 | STATIC void |
422 | xfs_bmbt_update_cursor( | |
423 | struct xfs_btree_cur *src, | |
424 | struct xfs_btree_cur *dst) | |
425 | { | |
426 | ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || | |
427 | (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); | |
2c3234d1 | 428 | ASSERT(dst->bc_private.b.dfops == src->bc_private.b.dfops); |
4b22a571 CH |
429 | |
430 | dst->bc_private.b.allocated += src->bc_private.b.allocated; | |
431 | dst->bc_private.b.firstblock = src->bc_private.b.firstblock; | |
432 | ||
433 | src->bc_private.b.allocated = 0; | |
434 | } | |
435 | ||
f5eb8e7c CH |
436 | STATIC int |
437 | xfs_bmbt_alloc_block( | |
438 | struct xfs_btree_cur *cur, | |
439 | union xfs_btree_ptr *start, | |
440 | union xfs_btree_ptr *new, | |
f5eb8e7c CH |
441 | int *stat) |
442 | { | |
443 | xfs_alloc_arg_t args; /* block allocation args */ | |
444 | int error; /* error return value */ | |
445 | ||
446 | memset(&args, 0, sizeof(args)); | |
447 | args.tp = cur->bc_tp; | |
448 | args.mp = cur->bc_mp; | |
449 | args.fsbno = cur->bc_private.b.firstblock; | |
450 | args.firstblock = args.fsbno; | |
340785cc DW |
451 | xfs_rmap_ino_bmbt_owner(&args.oinfo, cur->bc_private.b.ip->i_ino, |
452 | cur->bc_private.b.whichfork); | |
f5eb8e7c CH |
453 | |
454 | if (args.fsbno == NULLFSBLOCK) { | |
455 | args.fsbno = be64_to_cpu(start->l); | |
90e2056d | 456 | try_another_ag: |
f5eb8e7c CH |
457 | args.type = XFS_ALLOCTYPE_START_BNO; |
458 | /* | |
459 | * Make sure there is sufficient room left in the AG to | |
460 | * complete a full tree split for an extent insert. If | |
461 | * we are converting the middle part of an extent then | |
462 | * we may need space for two tree splits. | |
463 | * | |
464 | * We are relying on the caller to make the correct block | |
465 | * reservation for this operation to succeed. If the | |
466 | * reservation amount is insufficient then we may fail a | |
467 | * block allocation here and corrupt the filesystem. | |
468 | */ | |
a7e5d03b | 469 | args.minleft = args.tp->t_blk_res; |
2c3234d1 | 470 | } else if (cur->bc_private.b.dfops->dop_low) { |
f5eb8e7c CH |
471 | args.type = XFS_ALLOCTYPE_START_BNO; |
472 | } else { | |
473 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
474 | } | |
475 | ||
476 | args.minlen = args.maxlen = args.prod = 1; | |
477 | args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL; | |
a7e5d03b | 478 | if (!args.wasdel && args.tp->t_blk_res == 0) { |
2451337d | 479 | error = -ENOSPC; |
f5eb8e7c CH |
480 | goto error0; |
481 | } | |
482 | error = xfs_alloc_vextent(&args); | |
483 | if (error) | |
484 | goto error0; | |
485 | ||
90e2056d DW |
486 | /* |
487 | * During a CoW operation, the allocation and bmbt updates occur in | |
488 | * different transactions. The mapping code tries to put new bmbt | |
489 | * blocks near extents being mapped, but the only way to guarantee this | |
490 | * is if the alloc and the mapping happen in a single transaction that | |
491 | * has a block reservation. That isn't the case here, so if we run out | |
492 | * of space we'll try again with another AG. | |
493 | */ | |
494 | if (xfs_sb_version_hasreflink(&cur->bc_mp->m_sb) && | |
495 | args.fsbno == NULLFSBLOCK && | |
496 | args.type == XFS_ALLOCTYPE_NEAR_BNO) { | |
497 | cur->bc_private.b.dfops->dop_low = true; | |
498 | args.fsbno = cur->bc_private.b.firstblock; | |
499 | goto try_another_ag; | |
500 | } | |
501 | ||
f5eb8e7c CH |
502 | if (args.fsbno == NULLFSBLOCK && args.minleft) { |
503 | /* | |
504 | * Could not find an AG with enough free space to satisfy | |
505 | * a full btree split. Try again without minleft and if | |
506 | * successful activate the lowspace algorithm. | |
507 | */ | |
508 | args.fsbno = 0; | |
509 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
510 | args.minleft = 0; | |
511 | error = xfs_alloc_vextent(&args); | |
512 | if (error) | |
513 | goto error0; | |
2c3234d1 | 514 | cur->bc_private.b.dfops->dop_low = true; |
f5eb8e7c CH |
515 | } |
516 | if (args.fsbno == NULLFSBLOCK) { | |
517 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
518 | *stat = 0; | |
519 | return 0; | |
520 | } | |
521 | ASSERT(args.len == 1); | |
522 | cur->bc_private.b.firstblock = args.fsbno; | |
523 | cur->bc_private.b.allocated++; | |
524 | cur->bc_private.b.ip->i_d.di_nblocks++; | |
525 | xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE); | |
7d095257 | 526 | xfs_trans_mod_dquot_byino(args.tp, cur->bc_private.b.ip, |
f5eb8e7c CH |
527 | XFS_TRANS_DQ_BCOUNT, 1L); |
528 | ||
529 | new->l = cpu_to_be64(args.fsbno); | |
530 | ||
531 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
532 | *stat = 1; | |
533 | return 0; | |
534 | ||
535 | error0: | |
536 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); | |
537 | return error; | |
538 | } | |
539 | ||
d4b3a4b7 CH |
540 | STATIC int |
541 | xfs_bmbt_free_block( | |
542 | struct xfs_btree_cur *cur, | |
543 | struct xfs_buf *bp) | |
544 | { | |
545 | struct xfs_mount *mp = cur->bc_mp; | |
546 | struct xfs_inode *ip = cur->bc_private.b.ip; | |
547 | struct xfs_trans *tp = cur->bc_tp; | |
548 | xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); | |
340785cc | 549 | struct xfs_owner_info oinfo; |
d4b3a4b7 | 550 | |
340785cc DW |
551 | xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, cur->bc_private.b.whichfork); |
552 | xfs_bmap_add_free(mp, cur->bc_private.b.dfops, fsbno, 1, &oinfo); | |
d4b3a4b7 CH |
553 | ip->i_d.di_nblocks--; |
554 | ||
555 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
7d095257 | 556 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); |
d4b3a4b7 CH |
557 | return 0; |
558 | } | |
559 | ||
91cca5df CH |
560 | STATIC int |
561 | xfs_bmbt_get_minrecs( | |
562 | struct xfs_btree_cur *cur, | |
563 | int level) | |
564 | { | |
60197e8d CH |
565 | if (level == cur->bc_nlevels - 1) { |
566 | struct xfs_ifork *ifp; | |
567 | ||
568 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
569 | cur->bc_private.b.whichfork); | |
570 | ||
571 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
572 | ifp->if_broot_bytes, level == 0) / 2; | |
573 | } | |
574 | ||
575 | return cur->bc_mp->m_bmap_dmnr[level != 0]; | |
91cca5df CH |
576 | } |
577 | ||
60197e8d | 578 | int |
ce5e42db CH |
579 | xfs_bmbt_get_maxrecs( |
580 | struct xfs_btree_cur *cur, | |
581 | int level) | |
582 | { | |
60197e8d CH |
583 | if (level == cur->bc_nlevels - 1) { |
584 | struct xfs_ifork *ifp; | |
585 | ||
586 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
587 | cur->bc_private.b.whichfork); | |
588 | ||
589 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
590 | ifp->if_broot_bytes, level == 0); | |
591 | } | |
592 | ||
593 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
594 | ||
ce5e42db CH |
595 | } |
596 | ||
4b22a571 CH |
597 | /* |
598 | * Get the maximum records we could store in the on-disk format. | |
599 | * | |
600 | * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but | |
601 | * for the root node this checks the available space in the dinode fork | |
602 | * so that we can resize the in-memory buffer to match it. After a | |
603 | * resize to the maximum size this function returns the same value | |
604 | * as xfs_bmbt_get_maxrecs for the root node, too. | |
605 | */ | |
606 | STATIC int | |
607 | xfs_bmbt_get_dmaxrecs( | |
608 | struct xfs_btree_cur *cur, | |
609 | int level) | |
610 | { | |
60197e8d CH |
611 | if (level != cur->bc_nlevels - 1) |
612 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
152d93b7 | 613 | return xfs_bmdr_maxrecs(cur->bc_private.b.forksize, level == 0); |
4b22a571 CH |
614 | } |
615 | ||
fe033cc8 CH |
616 | STATIC void |
617 | xfs_bmbt_init_key_from_rec( | |
618 | union xfs_btree_key *key, | |
619 | union xfs_btree_rec *rec) | |
620 | { | |
621 | key->bmbt.br_startoff = | |
622 | cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); | |
623 | } | |
624 | ||
4b22a571 CH |
625 | STATIC void |
626 | xfs_bmbt_init_rec_from_cur( | |
627 | struct xfs_btree_cur *cur, | |
628 | union xfs_btree_rec *rec) | |
629 | { | |
630 | xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b); | |
631 | } | |
632 | ||
fe033cc8 CH |
633 | STATIC void |
634 | xfs_bmbt_init_ptr_from_cur( | |
635 | struct xfs_btree_cur *cur, | |
636 | union xfs_btree_ptr *ptr) | |
637 | { | |
638 | ptr->l = 0; | |
639 | } | |
640 | ||
641 | STATIC __int64_t | |
642 | xfs_bmbt_key_diff( | |
643 | struct xfs_btree_cur *cur, | |
644 | union xfs_btree_key *key) | |
645 | { | |
646 | return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) - | |
647 | cur->bc_rec.b.br_startoff; | |
648 | } | |
649 | ||
c5c249b4 | 650 | static bool |
612cfbfe | 651 | xfs_bmbt_verify( |
3d3e6f64 DC |
652 | struct xfs_buf *bp) |
653 | { | |
654 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
655 | struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); | |
656 | unsigned int level; | |
3d3e6f64 | 657 | |
ee1a47ab CH |
658 | switch (block->bb_magic) { |
659 | case cpu_to_be32(XFS_BMAP_CRC_MAGIC): | |
660 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
661 | return false; | |
ce748eaa | 662 | if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_meta_uuid)) |
ee1a47ab CH |
663 | return false; |
664 | if (be64_to_cpu(block->bb_u.l.bb_blkno) != bp->b_bn) | |
665 | return false; | |
666 | /* | |
667 | * XXX: need a better way of verifying the owner here. Right now | |
668 | * just make sure there has been one set. | |
669 | */ | |
670 | if (be64_to_cpu(block->bb_u.l.bb_owner) == 0) | |
671 | return false; | |
672 | /* fall through */ | |
673 | case cpu_to_be32(XFS_BMAP_MAGIC): | |
674 | break; | |
675 | default: | |
676 | return false; | |
677 | } | |
678 | ||
679 | /* | |
680 | * numrecs and level verification. | |
3d3e6f64 | 681 | * |
ee1a47ab | 682 | * We don't know what fork we belong to, so just verify that the level |
3d3e6f64 DC |
683 | * is less than the maximum of the two. Later checks will be more |
684 | * precise. | |
685 | */ | |
686 | level = be16_to_cpu(block->bb_level); | |
ee1a47ab CH |
687 | if (level > max(mp->m_bm_maxlevels[0], mp->m_bm_maxlevels[1])) |
688 | return false; | |
689 | if (be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0]) | |
690 | return false; | |
3d3e6f64 DC |
691 | |
692 | /* sibling pointer verification */ | |
ee1a47ab | 693 | if (!block->bb_u.l.bb_leftsib || |
d5cf09ba | 694 | (block->bb_u.l.bb_leftsib != cpu_to_be64(NULLFSBLOCK) && |
ee1a47ab CH |
695 | !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_leftsib)))) |
696 | return false; | |
697 | if (!block->bb_u.l.bb_rightsib || | |
d5cf09ba | 698 | (block->bb_u.l.bb_rightsib != cpu_to_be64(NULLFSBLOCK) && |
ee1a47ab CH |
699 | !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_rightsib)))) |
700 | return false; | |
701 | ||
702 | return true; | |
612cfbfe | 703 | } |
3d3e6f64 | 704 | |
1813dd64 DC |
705 | static void |
706 | xfs_bmbt_read_verify( | |
612cfbfe DC |
707 | struct xfs_buf *bp) |
708 | { | |
ce5028cf | 709 | if (!xfs_btree_lblock_verify_crc(bp)) |
2451337d | 710 | xfs_buf_ioerror(bp, -EFSBADCRC); |
ce5028cf | 711 | else if (!xfs_bmbt_verify(bp)) |
2451337d | 712 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
ce5028cf ES |
713 | |
714 | if (bp->b_error) { | |
715 | trace_xfs_btree_corrupt(bp, _RET_IP_); | |
716 | xfs_verifier_error(bp); | |
ee1a47ab | 717 | } |
612cfbfe DC |
718 | } |
719 | ||
1813dd64 DC |
720 | static void |
721 | xfs_bmbt_write_verify( | |
612cfbfe DC |
722 | struct xfs_buf *bp) |
723 | { | |
ee1a47ab | 724 | if (!xfs_bmbt_verify(bp)) { |
ee1a47ab | 725 | trace_xfs_btree_corrupt(bp, _RET_IP_); |
2451337d | 726 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
ce5028cf | 727 | xfs_verifier_error(bp); |
ee1a47ab CH |
728 | return; |
729 | } | |
730 | xfs_btree_lblock_calc_crc(bp); | |
3d3e6f64 DC |
731 | } |
732 | ||
1813dd64 | 733 | const struct xfs_buf_ops xfs_bmbt_buf_ops = { |
233135b7 | 734 | .name = "xfs_bmbt", |
1813dd64 DC |
735 | .verify_read = xfs_bmbt_read_verify, |
736 | .verify_write = xfs_bmbt_write_verify, | |
737 | }; | |
738 | ||
739 | ||
742ae1e3 | 740 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
741 | STATIC int |
742 | xfs_bmbt_keys_inorder( | |
743 | struct xfs_btree_cur *cur, | |
744 | union xfs_btree_key *k1, | |
745 | union xfs_btree_key *k2) | |
746 | { | |
747 | return be64_to_cpu(k1->bmbt.br_startoff) < | |
748 | be64_to_cpu(k2->bmbt.br_startoff); | |
749 | } | |
750 | ||
751 | STATIC int | |
752 | xfs_bmbt_recs_inorder( | |
753 | struct xfs_btree_cur *cur, | |
754 | union xfs_btree_rec *r1, | |
755 | union xfs_btree_rec *r2) | |
756 | { | |
757 | return xfs_bmbt_disk_get_startoff(&r1->bmbt) + | |
758 | xfs_bmbt_disk_get_blockcount(&r1->bmbt) <= | |
759 | xfs_bmbt_disk_get_startoff(&r2->bmbt); | |
760 | } | |
761 | #endif /* DEBUG */ | |
762 | ||
561f7d17 | 763 | static const struct xfs_btree_ops xfs_bmbt_ops = { |
65f1eaea CH |
764 | .rec_len = sizeof(xfs_bmbt_rec_t), |
765 | .key_len = sizeof(xfs_bmbt_key_t), | |
766 | ||
561f7d17 | 767 | .dup_cursor = xfs_bmbt_dup_cursor, |
4b22a571 | 768 | .update_cursor = xfs_bmbt_update_cursor, |
f5eb8e7c | 769 | .alloc_block = xfs_bmbt_alloc_block, |
d4b3a4b7 | 770 | .free_block = xfs_bmbt_free_block, |
ce5e42db | 771 | .get_maxrecs = xfs_bmbt_get_maxrecs, |
91cca5df | 772 | .get_minrecs = xfs_bmbt_get_minrecs, |
4b22a571 | 773 | .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, |
fe033cc8 | 774 | .init_key_from_rec = xfs_bmbt_init_key_from_rec, |
4b22a571 | 775 | .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, |
fe033cc8 CH |
776 | .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, |
777 | .key_diff = xfs_bmbt_key_diff, | |
1813dd64 | 778 | .buf_ops = &xfs_bmbt_buf_ops, |
742ae1e3 | 779 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
780 | .keys_inorder = xfs_bmbt_keys_inorder, |
781 | .recs_inorder = xfs_bmbt_recs_inorder, | |
782 | #endif | |
561f7d17 CH |
783 | }; |
784 | ||
785 | /* | |
786 | * Allocate a new bmap btree cursor. | |
787 | */ | |
788 | struct xfs_btree_cur * /* new bmap btree cursor */ | |
789 | xfs_bmbt_init_cursor( | |
790 | struct xfs_mount *mp, /* file system mount point */ | |
791 | struct xfs_trans *tp, /* transaction pointer */ | |
792 | struct xfs_inode *ip, /* inode owning the btree */ | |
793 | int whichfork) /* data or attr fork */ | |
794 | { | |
795 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
796 | struct xfs_btree_cur *cur; | |
3993baeb | 797 | ASSERT(whichfork != XFS_COW_FORK); |
561f7d17 | 798 | |
b24a978c | 799 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_NOFS); |
561f7d17 CH |
800 | |
801 | cur->bc_tp = tp; | |
802 | cur->bc_mp = mp; | |
803 | cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
804 | cur->bc_btnum = XFS_BTNUM_BMAP; | |
805 | cur->bc_blocklog = mp->m_sb.sb_blocklog; | |
11ef38af | 806 | cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_bmbt_2); |
561f7d17 CH |
807 | |
808 | cur->bc_ops = &xfs_bmbt_ops; | |
e99ab90d | 809 | cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE; |
ee1a47ab CH |
810 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
811 | cur->bc_flags |= XFS_BTREE_CRC_BLOCKS; | |
561f7d17 CH |
812 | |
813 | cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork); | |
814 | cur->bc_private.b.ip = ip; | |
815 | cur->bc_private.b.firstblock = NULLFSBLOCK; | |
2c3234d1 | 816 | cur->bc_private.b.dfops = NULL; |
561f7d17 CH |
817 | cur->bc_private.b.allocated = 0; |
818 | cur->bc_private.b.flags = 0; | |
819 | cur->bc_private.b.whichfork = whichfork; | |
820 | ||
821 | return cur; | |
822 | } | |
60197e8d CH |
823 | |
824 | /* | |
825 | * Calculate number of records in a bmap btree block. | |
826 | */ | |
827 | int | |
828 | xfs_bmbt_maxrecs( | |
829 | struct xfs_mount *mp, | |
830 | int blocklen, | |
831 | int leaf) | |
832 | { | |
7cc95a82 | 833 | blocklen -= XFS_BMBT_BLOCK_LEN(mp); |
60197e8d CH |
834 | |
835 | if (leaf) | |
836 | return blocklen / sizeof(xfs_bmbt_rec_t); | |
837 | return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)); | |
838 | } | |
839 | ||
840 | /* | |
841 | * Calculate number of records in a bmap btree inode root. | |
842 | */ | |
843 | int | |
844 | xfs_bmdr_maxrecs( | |
60197e8d CH |
845 | int blocklen, |
846 | int leaf) | |
847 | { | |
848 | blocklen -= sizeof(xfs_bmdr_block_t); | |
849 | ||
850 | if (leaf) | |
851 | return blocklen / sizeof(xfs_bmdr_rec_t); | |
852 | return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t)); | |
853 | } | |
21b5c978 DC |
854 | |
855 | /* | |
856 | * Change the owner of a btree format fork fo the inode passed in. Change it to | |
857 | * the owner of that is passed in so that we can change owners before or after | |
858 | * we switch forks between inodes. The operation that the caller is doing will | |
859 | * determine whether is needs to change owner before or after the switch. | |
860 | * | |
638f4416 DC |
861 | * For demand paged transactional modification, the fork switch should be done |
862 | * after reading in all the blocks, modifying them and pinning them in the | |
863 | * transaction. For modification when the buffers are already pinned in memory, | |
864 | * the fork switch can be done before changing the owner as we won't need to | |
865 | * validate the owner until the btree buffers are unpinned and writes can occur | |
866 | * again. | |
867 | * | |
868 | * For recovery based ownership change, there is no transactional context and | |
869 | * so a buffer list must be supplied so that we can record the buffers that we | |
870 | * modified for the caller to issue IO on. | |
21b5c978 DC |
871 | */ |
872 | int | |
873 | xfs_bmbt_change_owner( | |
874 | struct xfs_trans *tp, | |
875 | struct xfs_inode *ip, | |
876 | int whichfork, | |
638f4416 DC |
877 | xfs_ino_t new_owner, |
878 | struct list_head *buffer_list) | |
21b5c978 DC |
879 | { |
880 | struct xfs_btree_cur *cur; | |
881 | int error; | |
882 | ||
638f4416 DC |
883 | ASSERT(tp || buffer_list); |
884 | ASSERT(!(tp && buffer_list)); | |
21b5c978 | 885 | if (whichfork == XFS_DATA_FORK) |
aa9e1040 | 886 | ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_BTREE); |
21b5c978 | 887 | else |
aa9e1040 | 888 | ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_BTREE); |
21b5c978 DC |
889 | |
890 | cur = xfs_bmbt_init_cursor(ip->i_mount, tp, ip, whichfork); | |
638f4416 | 891 | if (!cur) |
2451337d | 892 | return -ENOMEM; |
638f4416 DC |
893 | |
894 | error = xfs_btree_change_owner(cur, new_owner, buffer_list); | |
21b5c978 DC |
895 | xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); |
896 | return error; | |
897 | } |