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Commit | Line | Data |
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9d6fabc0 DC |
1 | /* |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. | |
59915981 | 3 | * Copyright (c) 2013 Red Hat, Inc. |
9d6fabc0 DC |
4 | * All Rights Reserved. |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it would be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write the Free Software Foundation, | |
17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
9c799827 | 19 | #include "libxfs_priv.h" |
b626fb59 DC |
20 | #include "xfs_fs.h" |
21 | #include "xfs_shared.h" | |
22 | #include "xfs_format.h" | |
23 | #include "xfs_log_format.h" | |
24 | #include "xfs_trans_resv.h" | |
25 | #include "xfs_bit.h" | |
26 | #include "xfs_mount.h" | |
f944d3d0 | 27 | #include "xfs_defer.h" |
b626fb59 DC |
28 | #include "xfs_da_format.h" |
29 | #include "xfs_da_btree.h" | |
30 | #include "xfs_inode.h" | |
31 | #include "xfs_alloc.h" | |
32 | #include "xfs_trans.h" | |
33 | #include "xfs_bmap.h" | |
34 | #include "xfs_attr_leaf.h" | |
35 | #include "xfs_attr_remote.h" | |
36 | #include "xfs_trans_space.h" | |
37 | #include "xfs_trace.h" | |
38 | #include "xfs_cksum.h" | |
9d6fabc0 DC |
39 | |
40 | #define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */ | |
41 | ||
59915981 DC |
42 | /* |
43 | * Each contiguous block has a header, so it is not just a simple attribute | |
44 | * length to FSB conversion. | |
45 | */ | |
f08bc2a9 | 46 | int |
59915981 DC |
47 | xfs_attr3_rmt_blocks( |
48 | struct xfs_mount *mp, | |
49 | int attrlen) | |
50 | { | |
72e78b51 DC |
51 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
52 | int buflen = XFS_ATTR3_RMT_BUF_SPACE(mp, mp->m_sb.sb_blocksize); | |
53 | return (attrlen + buflen - 1) / buflen; | |
54 | } | |
55 | return XFS_B_TO_FSB(mp, attrlen); | |
59915981 DC |
56 | } |
57 | ||
f08bc2a9 DC |
58 | /* |
59 | * Checking of the remote attribute header is split into two parts. The verifier | |
60 | * does CRC, location and bounds checking, the unpacking function checks the | |
61 | * attribute parameters and owner. | |
62 | */ | |
bc01119d | 63 | static xfs_failaddr_t |
f08bc2a9 | 64 | xfs_attr3_rmt_hdr_ok( |
f08bc2a9 DC |
65 | void *ptr, |
66 | xfs_ino_t ino, | |
67 | uint32_t offset, | |
68 | uint32_t size, | |
69 | xfs_daddr_t bno) | |
70 | { | |
71 | struct xfs_attr3_rmt_hdr *rmt = ptr; | |
72 | ||
73 | if (bno != be64_to_cpu(rmt->rm_blkno)) | |
bc01119d | 74 | return __this_address; |
f08bc2a9 | 75 | if (offset != be32_to_cpu(rmt->rm_offset)) |
bc01119d | 76 | return __this_address; |
f08bc2a9 | 77 | if (size != be32_to_cpu(rmt->rm_bytes)) |
bc01119d | 78 | return __this_address; |
f08bc2a9 | 79 | if (ino != be64_to_cpu(rmt->rm_owner)) |
bc01119d | 80 | return __this_address; |
f08bc2a9 DC |
81 | |
82 | /* ok */ | |
bc01119d | 83 | return NULL; |
f08bc2a9 DC |
84 | } |
85 | ||
bc01119d | 86 | static xfs_failaddr_t |
59915981 | 87 | xfs_attr3_rmt_verify( |
f08bc2a9 DC |
88 | struct xfs_mount *mp, |
89 | void *ptr, | |
90 | int fsbsize, | |
91 | xfs_daddr_t bno) | |
59915981 | 92 | { |
f08bc2a9 | 93 | struct xfs_attr3_rmt_hdr *rmt = ptr; |
59915981 DC |
94 | |
95 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
bc01119d | 96 | return __this_address; |
59915981 | 97 | if (rmt->rm_magic != cpu_to_be32(XFS_ATTR3_RMT_MAGIC)) |
bc01119d | 98 | return __this_address; |
9c4e12fb | 99 | if (!uuid_equal(&rmt->rm_uuid, &mp->m_sb.sb_meta_uuid)) |
bc01119d | 100 | return __this_address; |
f08bc2a9 | 101 | if (be64_to_cpu(rmt->rm_blkno) != bno) |
bc01119d | 102 | return __this_address; |
f08bc2a9 | 103 | if (be32_to_cpu(rmt->rm_bytes) > fsbsize - sizeof(*rmt)) |
bc01119d | 104 | return __this_address; |
59915981 | 105 | if (be32_to_cpu(rmt->rm_offset) + |
ec9d24e9 | 106 | be32_to_cpu(rmt->rm_bytes) > XFS_XATTR_SIZE_MAX) |
bc01119d | 107 | return __this_address; |
59915981 | 108 | if (rmt->rm_owner == 0) |
bc01119d | 109 | return __this_address; |
59915981 | 110 | |
bc01119d | 111 | return NULL; |
59915981 DC |
112 | } |
113 | ||
114 | static void | |
115 | xfs_attr3_rmt_read_verify( | |
116 | struct xfs_buf *bp) | |
117 | { | |
118 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
f08bc2a9 | 119 | char *ptr; |
1e697959 | 120 | xfs_failaddr_t fa; |
f08bc2a9 | 121 | int len; |
f08bc2a9 | 122 | xfs_daddr_t bno; |
ff105f75 | 123 | int blksize = mp->m_attr_geo->blksize; |
59915981 DC |
124 | |
125 | /* no verification of non-crc buffers */ | |
126 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
127 | return; | |
128 | ||
f08bc2a9 DC |
129 | ptr = bp->b_addr; |
130 | bno = bp->b_bn; | |
131 | len = BBTOB(bp->b_length); | |
ff105f75 | 132 | ASSERT(len >= blksize); |
f08bc2a9 DC |
133 | |
134 | while (len > 0) { | |
ff105f75 | 135 | if (!xfs_verify_cksum(ptr, blksize, XFS_ATTR3_RMT_CRC_OFF)) { |
1e697959 | 136 | xfs_verifier_error(bp, -EFSBADCRC, __this_address); |
7e6c95f1 | 137 | return; |
f08bc2a9 | 138 | } |
1e697959 DW |
139 | fa = xfs_attr3_rmt_verify(mp, ptr, blksize, bno); |
140 | if (fa) { | |
141 | xfs_verifier_error(bp, -EFSCORRUPTED, fa); | |
142 | break; | |
f08bc2a9 | 143 | } |
ff105f75 DC |
144 | len -= blksize; |
145 | ptr += blksize; | |
146 | bno += BTOBB(blksize); | |
f08bc2a9 DC |
147 | } |
148 | ||
7e6c95f1 | 149 | if (len != 0) |
1e697959 | 150 | xfs_verifier_error(bp, -EFSCORRUPTED, __this_address); |
59915981 DC |
151 | } |
152 | ||
153 | static void | |
154 | xfs_attr3_rmt_write_verify( | |
155 | struct xfs_buf *bp) | |
156 | { | |
157 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
1e697959 | 158 | xfs_failaddr_t fa; |
d9241d7e | 159 | int blksize = mp->m_attr_geo->blksize; |
f08bc2a9 DC |
160 | char *ptr; |
161 | int len; | |
162 | xfs_daddr_t bno; | |
59915981 DC |
163 | |
164 | /* no verification of non-crc buffers */ | |
165 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
166 | return; | |
167 | ||
f08bc2a9 DC |
168 | ptr = bp->b_addr; |
169 | bno = bp->b_bn; | |
170 | len = BBTOB(bp->b_length); | |
ff105f75 | 171 | ASSERT(len >= blksize); |
f08bc2a9 DC |
172 | |
173 | while (len > 0) { | |
d9241d7e DC |
174 | struct xfs_attr3_rmt_hdr *rmt = (struct xfs_attr3_rmt_hdr *)ptr; |
175 | ||
1e697959 DW |
176 | fa = xfs_attr3_rmt_verify(mp, ptr, blksize, bno); |
177 | if (fa) { | |
178 | xfs_verifier_error(bp, -EFSCORRUPTED, fa); | |
f08bc2a9 DC |
179 | return; |
180 | } | |
59915981 | 181 | |
d9241d7e DC |
182 | /* |
183 | * Ensure we aren't writing bogus LSNs to disk. See | |
184 | * xfs_attr3_rmt_hdr_set() for the explanation. | |
185 | */ | |
186 | if (rmt->rm_lsn != cpu_to_be64(NULLCOMMITLSN)) { | |
1e697959 | 187 | xfs_verifier_error(bp, -EFSCORRUPTED, __this_address); |
d9241d7e | 188 | return; |
f08bc2a9 | 189 | } |
ff105f75 | 190 | xfs_update_cksum(ptr, blksize, XFS_ATTR3_RMT_CRC_OFF); |
f08bc2a9 | 191 | |
ff105f75 DC |
192 | len -= blksize; |
193 | ptr += blksize; | |
194 | bno += BTOBB(blksize); | |
59915981 | 195 | } |
7e6c95f1 DW |
196 | |
197 | if (len != 0) | |
1e697959 | 198 | xfs_verifier_error(bp, -EFSCORRUPTED, __this_address); |
59915981 DC |
199 | } |
200 | ||
201 | const struct xfs_buf_ops xfs_attr3_rmt_buf_ops = { | |
a3fac935 | 202 | .name = "xfs_attr3_rmt", |
59915981 DC |
203 | .verify_read = xfs_attr3_rmt_read_verify, |
204 | .verify_write = xfs_attr3_rmt_write_verify, | |
205 | }; | |
206 | ||
f08bc2a9 | 207 | STATIC int |
59915981 DC |
208 | xfs_attr3_rmt_hdr_set( |
209 | struct xfs_mount *mp, | |
f08bc2a9 | 210 | void *ptr, |
59915981 DC |
211 | xfs_ino_t ino, |
212 | uint32_t offset, | |
213 | uint32_t size, | |
f08bc2a9 | 214 | xfs_daddr_t bno) |
59915981 | 215 | { |
f08bc2a9 | 216 | struct xfs_attr3_rmt_hdr *rmt = ptr; |
59915981 DC |
217 | |
218 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
219 | return 0; | |
220 | ||
221 | rmt->rm_magic = cpu_to_be32(XFS_ATTR3_RMT_MAGIC); | |
222 | rmt->rm_offset = cpu_to_be32(offset); | |
223 | rmt->rm_bytes = cpu_to_be32(size); | |
9c4e12fb | 224 | uuid_copy(&rmt->rm_uuid, &mp->m_sb.sb_meta_uuid); |
59915981 | 225 | rmt->rm_owner = cpu_to_be64(ino); |
f08bc2a9 | 226 | rmt->rm_blkno = cpu_to_be64(bno); |
59915981 | 227 | |
d9241d7e DC |
228 | /* |
229 | * Remote attribute blocks are written synchronously, so we don't | |
230 | * have an LSN that we can stamp in them that makes any sense to log | |
231 | * recovery. To ensure that log recovery handles overwrites of these | |
232 | * blocks sanely (i.e. once they've been freed and reallocated as some | |
233 | * other type of metadata) we need to ensure that the LSN has a value | |
234 | * that tells log recovery to ignore the LSN and overwrite the buffer | |
235 | * with whatever is in it's log. To do this, we use the magic | |
236 | * NULLCOMMITLSN to indicate that the LSN is invalid. | |
237 | */ | |
238 | rmt->rm_lsn = cpu_to_be64(NULLCOMMITLSN); | |
239 | ||
59915981 DC |
240 | return sizeof(struct xfs_attr3_rmt_hdr); |
241 | } | |
242 | ||
243 | /* | |
f08bc2a9 | 244 | * Helper functions to copy attribute data in and out of the one disk extents |
59915981 | 245 | */ |
f08bc2a9 DC |
246 | STATIC int |
247 | xfs_attr_rmtval_copyout( | |
248 | struct xfs_mount *mp, | |
249 | struct xfs_buf *bp, | |
250 | xfs_ino_t ino, | |
251 | int *offset, | |
252 | int *valuelen, | |
4a492e72 | 253 | uint8_t **dst) |
59915981 | 254 | { |
f08bc2a9 DC |
255 | char *src = bp->b_addr; |
256 | xfs_daddr_t bno = bp->b_bn; | |
257 | int len = BBTOB(bp->b_length); | |
ff105f75 | 258 | int blksize = mp->m_attr_geo->blksize; |
59915981 | 259 | |
ff105f75 | 260 | ASSERT(len >= blksize); |
59915981 | 261 | |
f08bc2a9 DC |
262 | while (len > 0 && *valuelen > 0) { |
263 | int hdr_size = 0; | |
ff105f75 | 264 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, blksize); |
f08bc2a9 DC |
265 | |
266 | byte_cnt = min(*valuelen, byte_cnt); | |
267 | ||
268 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
bc01119d | 269 | if (xfs_attr3_rmt_hdr_ok(src, ino, *offset, |
f08bc2a9 DC |
270 | byte_cnt, bno)) { |
271 | xfs_alert(mp, | |
272 | "remote attribute header mismatch bno/off/len/owner (0x%llx/0x%x/Ox%x/0x%llx)", | |
273 | bno, *offset, byte_cnt, ino); | |
12b53197 | 274 | return -EFSCORRUPTED; |
f08bc2a9 DC |
275 | } |
276 | hdr_size = sizeof(struct xfs_attr3_rmt_hdr); | |
277 | } | |
278 | ||
279 | memcpy(*dst, src + hdr_size, byte_cnt); | |
280 | ||
281 | /* roll buffer forwards */ | |
ff105f75 DC |
282 | len -= blksize; |
283 | src += blksize; | |
284 | bno += BTOBB(blksize); | |
f08bc2a9 DC |
285 | |
286 | /* roll attribute data forwards */ | |
287 | *valuelen -= byte_cnt; | |
288 | *dst += byte_cnt; | |
289 | *offset += byte_cnt; | |
290 | } | |
291 | return 0; | |
292 | } | |
293 | ||
294 | STATIC void | |
295 | xfs_attr_rmtval_copyin( | |
296 | struct xfs_mount *mp, | |
297 | struct xfs_buf *bp, | |
298 | xfs_ino_t ino, | |
299 | int *offset, | |
300 | int *valuelen, | |
4a492e72 | 301 | uint8_t **src) |
f08bc2a9 DC |
302 | { |
303 | char *dst = bp->b_addr; | |
304 | xfs_daddr_t bno = bp->b_bn; | |
305 | int len = BBTOB(bp->b_length); | |
ff105f75 | 306 | int blksize = mp->m_attr_geo->blksize; |
f08bc2a9 | 307 | |
ff105f75 | 308 | ASSERT(len >= blksize); |
f08bc2a9 DC |
309 | |
310 | while (len > 0 && *valuelen > 0) { | |
311 | int hdr_size; | |
ff105f75 | 312 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, blksize); |
f08bc2a9 DC |
313 | |
314 | byte_cnt = min(*valuelen, byte_cnt); | |
315 | hdr_size = xfs_attr3_rmt_hdr_set(mp, dst, ino, *offset, | |
316 | byte_cnt, bno); | |
317 | ||
318 | memcpy(dst + hdr_size, *src, byte_cnt); | |
319 | ||
320 | /* | |
321 | * If this is the last block, zero the remainder of it. | |
322 | * Check that we are actually the last block, too. | |
323 | */ | |
ff105f75 | 324 | if (byte_cnt + hdr_size < blksize) { |
f08bc2a9 | 325 | ASSERT(*valuelen - byte_cnt == 0); |
ff105f75 | 326 | ASSERT(len == blksize); |
f08bc2a9 | 327 | memset(dst + hdr_size + byte_cnt, 0, |
ff105f75 | 328 | blksize - hdr_size - byte_cnt); |
f08bc2a9 DC |
329 | } |
330 | ||
331 | /* roll buffer forwards */ | |
ff105f75 DC |
332 | len -= blksize; |
333 | dst += blksize; | |
334 | bno += BTOBB(blksize); | |
f08bc2a9 DC |
335 | |
336 | /* roll attribute data forwards */ | |
337 | *valuelen -= byte_cnt; | |
338 | *src += byte_cnt; | |
339 | *offset += byte_cnt; | |
340 | } | |
59915981 DC |
341 | } |
342 | ||
9d6fabc0 DC |
343 | /* |
344 | * Read the value associated with an attribute from the out-of-line buffer | |
345 | * that we stored it in. | |
346 | */ | |
347 | int | |
59915981 DC |
348 | xfs_attr_rmtval_get( |
349 | struct xfs_da_args *args) | |
9d6fabc0 | 350 | { |
59915981 DC |
351 | struct xfs_bmbt_irec map[ATTR_RMTVALUE_MAPSIZE]; |
352 | struct xfs_mount *mp = args->dp->i_mount; | |
353 | struct xfs_buf *bp; | |
59915981 | 354 | xfs_dablk_t lblkno = args->rmtblkno; |
4a492e72 | 355 | uint8_t *dst = args->value; |
ff105f75 | 356 | int valuelen; |
59915981 DC |
357 | int nmap; |
358 | int error; | |
f08bc2a9 | 359 | int blkcnt = args->rmtblkcnt; |
59915981 DC |
360 | int i; |
361 | int offset = 0; | |
9d6fabc0 DC |
362 | |
363 | trace_xfs_attr_rmtval_get(args); | |
364 | ||
365 | ASSERT(!(args->flags & ATTR_KERNOVAL)); | |
ff105f75 | 366 | ASSERT(args->rmtvaluelen == args->valuelen); |
9d6fabc0 | 367 | |
ff105f75 | 368 | valuelen = args->rmtvaluelen; |
9d6fabc0 DC |
369 | while (valuelen > 0) { |
370 | nmap = ATTR_RMTVALUE_MAPSIZE; | |
371 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
72e78b51 | 372 | blkcnt, map, &nmap, |
9d6fabc0 DC |
373 | XFS_BMAPI_ATTRFORK); |
374 | if (error) | |
59915981 | 375 | return error; |
9d6fabc0 DC |
376 | ASSERT(nmap >= 1); |
377 | ||
378 | for (i = 0; (i < nmap) && (valuelen > 0); i++) { | |
f08bc2a9 DC |
379 | xfs_daddr_t dblkno; |
380 | int dblkcnt; | |
59915981 | 381 | |
9d6fabc0 DC |
382 | ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && |
383 | (map[i].br_startblock != HOLESTARTBLOCK)); | |
384 | dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); | |
f08bc2a9 | 385 | dblkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
b2d5ffd5 DW |
386 | error = xfs_trans_read_buf(mp, args->trans, |
387 | mp->m_ddev_targp, | |
f08bc2a9 | 388 | dblkno, dblkcnt, 0, &bp, |
59915981 | 389 | &xfs_attr3_rmt_buf_ops); |
9d6fabc0 | 390 | if (error) |
59915981 DC |
391 | return error; |
392 | ||
f08bc2a9 DC |
393 | error = xfs_attr_rmtval_copyout(mp, bp, args->dp->i_ino, |
394 | &offset, &valuelen, | |
395 | &dst); | |
b2d5ffd5 | 396 | xfs_trans_brelse(args->trans, bp); |
f08bc2a9 DC |
397 | if (error) |
398 | return error; | |
59915981 | 399 | |
f08bc2a9 | 400 | /* roll attribute extent map forwards */ |
9d6fabc0 | 401 | lblkno += map[i].br_blockcount; |
f08bc2a9 | 402 | blkcnt -= map[i].br_blockcount; |
9d6fabc0 DC |
403 | } |
404 | } | |
405 | ASSERT(valuelen == 0); | |
59915981 | 406 | return 0; |
9d6fabc0 DC |
407 | } |
408 | ||
409 | /* | |
410 | * Write the value associated with an attribute into the out-of-line buffer | |
411 | * that we have defined for it. | |
412 | */ | |
413 | int | |
59915981 DC |
414 | xfs_attr_rmtval_set( |
415 | struct xfs_da_args *args) | |
9d6fabc0 | 416 | { |
59915981 DC |
417 | struct xfs_inode *dp = args->dp; |
418 | struct xfs_mount *mp = dp->i_mount; | |
419 | struct xfs_bmbt_irec map; | |
59915981 DC |
420 | xfs_dablk_t lblkno; |
421 | xfs_fileoff_t lfileoff = 0; | |
4a492e72 | 422 | uint8_t *src = args->value; |
59915981 DC |
423 | int blkcnt; |
424 | int valuelen; | |
425 | int nmap; | |
426 | int error; | |
59915981 | 427 | int offset = 0; |
9d6fabc0 DC |
428 | |
429 | trace_xfs_attr_rmtval_set(args); | |
430 | ||
9d6fabc0 DC |
431 | /* |
432 | * Find a "hole" in the attribute address space large enough for | |
59915981 DC |
433 | * us to drop the new attribute's value into. Because CRC enable |
434 | * attributes have headers, we can't just do a straight byte to FSB | |
f08bc2a9 | 435 | * conversion and have to take the header space into account. |
9d6fabc0 | 436 | */ |
ff105f75 | 437 | blkcnt = xfs_attr3_rmt_blocks(mp, args->rmtvaluelen); |
9d6fabc0 DC |
438 | error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, |
439 | XFS_ATTR_FORK); | |
59915981 DC |
440 | if (error) |
441 | return error; | |
442 | ||
9d6fabc0 DC |
443 | args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff; |
444 | args->rmtblkcnt = blkcnt; | |
445 | ||
446 | /* | |
447 | * Roll through the "value", allocating blocks on disk as required. | |
448 | */ | |
449 | while (blkcnt > 0) { | |
450 | /* | |
451 | * Allocate a single extent, up to the size of the value. | |
92a57a69 DC |
452 | * |
453 | * Note that we have to consider this a data allocation as we | |
454 | * write the remote attribute without logging the contents. | |
455 | * Hence we must ensure that we aren't using blocks that are on | |
456 | * the busy list so that we don't overwrite blocks which have | |
457 | * recently been freed but their transactions are not yet | |
458 | * committed to disk. If we overwrite the contents of a busy | |
459 | * extent and then crash then the block may not contain the | |
460 | * correct metadata after log recovery occurs. | |
9d6fabc0 | 461 | */ |
f33cea1a | 462 | xfs_defer_init(args->dfops, args->firstblock); |
9d6fabc0 DC |
463 | nmap = 1; |
464 | error = xfs_bmapi_write(args->trans, dp, (xfs_fileoff_t)lblkno, | |
92a57a69 | 465 | blkcnt, XFS_BMAPI_ATTRFORK, args->firstblock, |
f33cea1a | 466 | args->total, &map, &nmap, args->dfops); |
5c33baee CH |
467 | if (error) |
468 | goto out_defer_cancel; | |
469 | xfs_defer_ijoin(args->dfops, dp); | |
470 | error = xfs_defer_finish(&args->trans, args->dfops); | |
471 | if (error) | |
472 | goto out_defer_cancel; | |
9d6fabc0 | 473 | |
9d6fabc0 DC |
474 | ASSERT(nmap == 1); |
475 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
476 | (map.br_startblock != HOLESTARTBLOCK)); | |
477 | lblkno += map.br_blockcount; | |
478 | blkcnt -= map.br_blockcount; | |
479 | ||
480 | /* | |
481 | * Start the next trans in the chain. | |
482 | */ | |
d67406c9 | 483 | error = xfs_trans_roll_inode(&args->trans, dp); |
9d6fabc0 | 484 | if (error) |
af43ca9f | 485 | return error; |
9d6fabc0 DC |
486 | } |
487 | ||
488 | /* | |
489 | * Roll through the "value", copying the attribute value to the | |
490 | * already-allocated blocks. Blocks are written synchronously | |
491 | * so that we can know they are all on disk before we turn off | |
492 | * the INCOMPLETE flag. | |
493 | */ | |
494 | lblkno = args->rmtblkno; | |
4da23ca6 | 495 | blkcnt = args->rmtblkcnt; |
ff105f75 | 496 | valuelen = args->rmtvaluelen; |
9d6fabc0 | 497 | while (valuelen > 0) { |
f08bc2a9 DC |
498 | struct xfs_buf *bp; |
499 | xfs_daddr_t dblkno; | |
500 | int dblkcnt; | |
501 | ||
502 | ASSERT(blkcnt > 0); | |
9d6fabc0 | 503 | |
f33cea1a | 504 | xfs_defer_init(args->dfops, args->firstblock); |
9d6fabc0 DC |
505 | nmap = 1; |
506 | error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno, | |
4da23ca6 | 507 | blkcnt, &map, &nmap, |
9d6fabc0 DC |
508 | XFS_BMAPI_ATTRFORK); |
509 | if (error) | |
af43ca9f | 510 | return error; |
9d6fabc0 DC |
511 | ASSERT(nmap == 1); |
512 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
513 | (map.br_startblock != HOLESTARTBLOCK)); | |
514 | ||
515 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
4da23ca6 | 516 | dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
9d6fabc0 | 517 | |
4da23ca6 | 518 | bp = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt, 0); |
9d6fabc0 | 519 | if (!bp) |
12b53197 | 520 | return -ENOMEM; |
59915981 DC |
521 | bp->b_ops = &xfs_attr3_rmt_buf_ops; |
522 | ||
f08bc2a9 DC |
523 | xfs_attr_rmtval_copyin(mp, bp, args->dp->i_ino, &offset, |
524 | &valuelen, &src); | |
9d6fabc0 DC |
525 | |
526 | error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */ | |
527 | xfs_buf_relse(bp); | |
528 | if (error) | |
529 | return error; | |
59915981 | 530 | |
9d6fabc0 | 531 | |
f08bc2a9 | 532 | /* roll attribute extent map forwards */ |
9d6fabc0 | 533 | lblkno += map.br_blockcount; |
4da23ca6 | 534 | blkcnt -= map.br_blockcount; |
9d6fabc0 DC |
535 | } |
536 | ASSERT(valuelen == 0); | |
59915981 | 537 | return 0; |
5c33baee CH |
538 | out_defer_cancel: |
539 | xfs_defer_cancel(args->dfops); | |
540 | args->trans = NULL; | |
541 | return error; | |
9d6fabc0 DC |
542 | } |
543 | ||
544 | /* | |
545 | * Remove the value associated with an attribute by deleting the | |
546 | * out-of-line buffer that it is stored on. | |
547 | */ | |
548 | int | |
f08bc2a9 DC |
549 | xfs_attr_rmtval_remove( |
550 | struct xfs_da_args *args) | |
9d6fabc0 | 551 | { |
f08bc2a9 DC |
552 | struct xfs_mount *mp = args->dp->i_mount; |
553 | xfs_dablk_t lblkno; | |
554 | int blkcnt; | |
555 | int error; | |
556 | int done; | |
9d6fabc0 DC |
557 | |
558 | trace_xfs_attr_rmtval_remove(args); | |
559 | ||
9d6fabc0 | 560 | /* |
526f9be5 | 561 | * Roll through the "value", invalidating the attribute value's blocks. |
9d6fabc0 DC |
562 | */ |
563 | lblkno = args->rmtblkno; | |
f08bc2a9 DC |
564 | blkcnt = args->rmtblkcnt; |
565 | while (blkcnt > 0) { | |
566 | struct xfs_bmbt_irec map; | |
567 | struct xfs_buf *bp; | |
568 | xfs_daddr_t dblkno; | |
569 | int dblkcnt; | |
570 | int nmap; | |
526f9be5 | 571 | |
9d6fabc0 DC |
572 | /* |
573 | * Try to remember where we decided to put the value. | |
574 | */ | |
575 | nmap = 1; | |
576 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
526f9be5 | 577 | blkcnt, &map, &nmap, XFS_BMAPI_ATTRFORK); |
9d6fabc0 | 578 | if (error) |
af43ca9f | 579 | return error; |
9d6fabc0 DC |
580 | ASSERT(nmap == 1); |
581 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
582 | (map.br_startblock != HOLESTARTBLOCK)); | |
583 | ||
584 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
526f9be5 | 585 | dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
9d6fabc0 DC |
586 | |
587 | /* | |
588 | * If the "remote" value is in the cache, remove it. | |
589 | */ | |
526f9be5 | 590 | bp = xfs_incore(mp->m_ddev_targp, dblkno, dblkcnt, XBF_TRYLOCK); |
9d6fabc0 DC |
591 | if (bp) { |
592 | xfs_buf_stale(bp); | |
593 | xfs_buf_relse(bp); | |
594 | bp = NULL; | |
595 | } | |
596 | ||
9d6fabc0 | 597 | lblkno += map.br_blockcount; |
526f9be5 | 598 | blkcnt -= map.br_blockcount; |
9d6fabc0 DC |
599 | } |
600 | ||
601 | /* | |
602 | * Keep de-allocating extents until the remote-value region is gone. | |
603 | */ | |
604 | lblkno = args->rmtblkno; | |
f08bc2a9 | 605 | blkcnt = args->rmtblkcnt; |
9d6fabc0 DC |
606 | done = 0; |
607 | while (!done) { | |
f33cea1a | 608 | xfs_defer_init(args->dfops, args->firstblock); |
9d6fabc0 | 609 | error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt, |
db9cba4e | 610 | XFS_BMAPI_ATTRFORK, 1, args->firstblock, |
f33cea1a | 611 | args->dfops, &done); |
5c33baee CH |
612 | if (error) |
613 | goto out_defer_cancel; | |
614 | xfs_defer_ijoin(args->dfops, args->dp); | |
615 | error = xfs_defer_finish(&args->trans, args->dfops); | |
616 | if (error) | |
617 | goto out_defer_cancel; | |
9d6fabc0 | 618 | |
9d6fabc0 DC |
619 | /* |
620 | * Close out trans and start the next one in the chain. | |
621 | */ | |
d67406c9 | 622 | error = xfs_trans_roll_inode(&args->trans, args->dp); |
9d6fabc0 | 623 | if (error) |
af43ca9f | 624 | return error; |
9d6fabc0 | 625 | } |
af43ca9f | 626 | return 0; |
5c33baee CH |
627 | out_defer_cancel: |
628 | xfs_defer_cancel(args->dfops); | |
629 | args->trans = NULL; | |
630 | return error; | |
9d6fabc0 | 631 | } |