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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 | */ | |
63 | static bool | |
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)) | |
74 | return false; | |
75 | if (offset != be32_to_cpu(rmt->rm_offset)) | |
76 | return false; | |
77 | if (size != be32_to_cpu(rmt->rm_bytes)) | |
78 | return false; | |
79 | if (ino != be64_to_cpu(rmt->rm_owner)) | |
80 | return false; | |
81 | ||
82 | /* ok */ | |
83 | return true; | |
84 | } | |
85 | ||
59915981 DC |
86 | static bool |
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)) | |
96 | return false; | |
97 | if (rmt->rm_magic != cpu_to_be32(XFS_ATTR3_RMT_MAGIC)) | |
98 | return false; | |
9c4e12fb | 99 | if (!uuid_equal(&rmt->rm_uuid, &mp->m_sb.sb_meta_uuid)) |
59915981 | 100 | return false; |
f08bc2a9 DC |
101 | if (be64_to_cpu(rmt->rm_blkno) != bno) |
102 | return false; | |
103 | if (be32_to_cpu(rmt->rm_bytes) > fsbsize - sizeof(*rmt)) | |
59915981 DC |
104 | return false; |
105 | if (be32_to_cpu(rmt->rm_offset) + | |
ec9d24e9 | 106 | be32_to_cpu(rmt->rm_bytes) > XFS_XATTR_SIZE_MAX) |
59915981 DC |
107 | return false; |
108 | if (rmt->rm_owner == 0) | |
109 | return false; | |
110 | ||
111 | return true; | |
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 DC |
119 | char *ptr; |
120 | int len; | |
f08bc2a9 | 121 | xfs_daddr_t bno; |
ff105f75 | 122 | int blksize = mp->m_attr_geo->blksize; |
59915981 DC |
123 | |
124 | /* no verification of non-crc buffers */ | |
125 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
126 | return; | |
127 | ||
f08bc2a9 DC |
128 | ptr = bp->b_addr; |
129 | bno = bp->b_bn; | |
130 | len = BBTOB(bp->b_length); | |
ff105f75 | 131 | ASSERT(len >= blksize); |
f08bc2a9 DC |
132 | |
133 | while (len > 0) { | |
ff105f75 | 134 | if (!xfs_verify_cksum(ptr, blksize, XFS_ATTR3_RMT_CRC_OFF)) { |
12b53197 | 135 | xfs_buf_ioerror(bp, -EFSBADCRC); |
f08bc2a9 DC |
136 | break; |
137 | } | |
ff105f75 | 138 | if (!xfs_attr3_rmt_verify(mp, ptr, blksize, bno)) { |
12b53197 | 139 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
f08bc2a9 DC |
140 | break; |
141 | } | |
ff105f75 DC |
142 | len -= blksize; |
143 | ptr += blksize; | |
144 | bno += BTOBB(blksize); | |
f08bc2a9 DC |
145 | } |
146 | ||
45922933 DC |
147 | if (bp->b_error) |
148 | xfs_verifier_error(bp); | |
149 | else | |
f08bc2a9 | 150 | ASSERT(len == 0); |
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; | |
d9241d7e | 158 | int blksize = mp->m_attr_geo->blksize; |
f08bc2a9 DC |
159 | char *ptr; |
160 | int len; | |
161 | xfs_daddr_t bno; | |
59915981 DC |
162 | |
163 | /* no verification of non-crc buffers */ | |
164 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
165 | return; | |
166 | ||
f08bc2a9 DC |
167 | ptr = bp->b_addr; |
168 | bno = bp->b_bn; | |
169 | len = BBTOB(bp->b_length); | |
ff105f75 | 170 | ASSERT(len >= blksize); |
f08bc2a9 DC |
171 | |
172 | while (len > 0) { | |
d9241d7e DC |
173 | struct xfs_attr3_rmt_hdr *rmt = (struct xfs_attr3_rmt_hdr *)ptr; |
174 | ||
ff105f75 | 175 | if (!xfs_attr3_rmt_verify(mp, ptr, blksize, bno)) { |
12b53197 | 176 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
45922933 | 177 | xfs_verifier_error(bp); |
f08bc2a9 DC |
178 | return; |
179 | } | |
59915981 | 180 | |
d9241d7e DC |
181 | /* |
182 | * Ensure we aren't writing bogus LSNs to disk. See | |
183 | * xfs_attr3_rmt_hdr_set() for the explanation. | |
184 | */ | |
185 | if (rmt->rm_lsn != cpu_to_be64(NULLCOMMITLSN)) { | |
186 | xfs_buf_ioerror(bp, -EFSCORRUPTED); | |
187 | xfs_verifier_error(bp); | |
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 | } |
f08bc2a9 | 196 | ASSERT(len == 0); |
59915981 DC |
197 | } |
198 | ||
199 | const struct xfs_buf_ops xfs_attr3_rmt_buf_ops = { | |
a3fac935 | 200 | .name = "xfs_attr3_rmt", |
59915981 DC |
201 | .verify_read = xfs_attr3_rmt_read_verify, |
202 | .verify_write = xfs_attr3_rmt_write_verify, | |
203 | }; | |
204 | ||
f08bc2a9 | 205 | STATIC int |
59915981 DC |
206 | xfs_attr3_rmt_hdr_set( |
207 | struct xfs_mount *mp, | |
f08bc2a9 | 208 | void *ptr, |
59915981 DC |
209 | xfs_ino_t ino, |
210 | uint32_t offset, | |
211 | uint32_t size, | |
f08bc2a9 | 212 | xfs_daddr_t bno) |
59915981 | 213 | { |
f08bc2a9 | 214 | struct xfs_attr3_rmt_hdr *rmt = ptr; |
59915981 DC |
215 | |
216 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
217 | return 0; | |
218 | ||
219 | rmt->rm_magic = cpu_to_be32(XFS_ATTR3_RMT_MAGIC); | |
220 | rmt->rm_offset = cpu_to_be32(offset); | |
221 | rmt->rm_bytes = cpu_to_be32(size); | |
9c4e12fb | 222 | uuid_copy(&rmt->rm_uuid, &mp->m_sb.sb_meta_uuid); |
59915981 | 223 | rmt->rm_owner = cpu_to_be64(ino); |
f08bc2a9 | 224 | rmt->rm_blkno = cpu_to_be64(bno); |
59915981 | 225 | |
d9241d7e DC |
226 | /* |
227 | * Remote attribute blocks are written synchronously, so we don't | |
228 | * have an LSN that we can stamp in them that makes any sense to log | |
229 | * recovery. To ensure that log recovery handles overwrites of these | |
230 | * blocks sanely (i.e. once they've been freed and reallocated as some | |
231 | * other type of metadata) we need to ensure that the LSN has a value | |
232 | * that tells log recovery to ignore the LSN and overwrite the buffer | |
233 | * with whatever is in it's log. To do this, we use the magic | |
234 | * NULLCOMMITLSN to indicate that the LSN is invalid. | |
235 | */ | |
236 | rmt->rm_lsn = cpu_to_be64(NULLCOMMITLSN); | |
237 | ||
59915981 DC |
238 | return sizeof(struct xfs_attr3_rmt_hdr); |
239 | } | |
240 | ||
241 | /* | |
f08bc2a9 | 242 | * Helper functions to copy attribute data in and out of the one disk extents |
59915981 | 243 | */ |
f08bc2a9 DC |
244 | STATIC int |
245 | xfs_attr_rmtval_copyout( | |
246 | struct xfs_mount *mp, | |
247 | struct xfs_buf *bp, | |
248 | xfs_ino_t ino, | |
249 | int *offset, | |
250 | int *valuelen, | |
4a492e72 | 251 | uint8_t **dst) |
59915981 | 252 | { |
f08bc2a9 DC |
253 | char *src = bp->b_addr; |
254 | xfs_daddr_t bno = bp->b_bn; | |
255 | int len = BBTOB(bp->b_length); | |
ff105f75 | 256 | int blksize = mp->m_attr_geo->blksize; |
59915981 | 257 | |
ff105f75 | 258 | ASSERT(len >= blksize); |
59915981 | 259 | |
f08bc2a9 DC |
260 | while (len > 0 && *valuelen > 0) { |
261 | int hdr_size = 0; | |
ff105f75 | 262 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, blksize); |
f08bc2a9 DC |
263 | |
264 | byte_cnt = min(*valuelen, byte_cnt); | |
265 | ||
266 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
ff105f75 | 267 | if (!xfs_attr3_rmt_hdr_ok(src, ino, *offset, |
f08bc2a9 DC |
268 | byte_cnt, bno)) { |
269 | xfs_alert(mp, | |
270 | "remote attribute header mismatch bno/off/len/owner (0x%llx/0x%x/Ox%x/0x%llx)", | |
271 | bno, *offset, byte_cnt, ino); | |
12b53197 | 272 | return -EFSCORRUPTED; |
f08bc2a9 DC |
273 | } |
274 | hdr_size = sizeof(struct xfs_attr3_rmt_hdr); | |
275 | } | |
276 | ||
277 | memcpy(*dst, src + hdr_size, byte_cnt); | |
278 | ||
279 | /* roll buffer forwards */ | |
ff105f75 DC |
280 | len -= blksize; |
281 | src += blksize; | |
282 | bno += BTOBB(blksize); | |
f08bc2a9 DC |
283 | |
284 | /* roll attribute data forwards */ | |
285 | *valuelen -= byte_cnt; | |
286 | *dst += byte_cnt; | |
287 | *offset += byte_cnt; | |
288 | } | |
289 | return 0; | |
290 | } | |
291 | ||
292 | STATIC void | |
293 | xfs_attr_rmtval_copyin( | |
294 | struct xfs_mount *mp, | |
295 | struct xfs_buf *bp, | |
296 | xfs_ino_t ino, | |
297 | int *offset, | |
298 | int *valuelen, | |
4a492e72 | 299 | uint8_t **src) |
f08bc2a9 DC |
300 | { |
301 | char *dst = bp->b_addr; | |
302 | xfs_daddr_t bno = bp->b_bn; | |
303 | int len = BBTOB(bp->b_length); | |
ff105f75 | 304 | int blksize = mp->m_attr_geo->blksize; |
f08bc2a9 | 305 | |
ff105f75 | 306 | ASSERT(len >= blksize); |
f08bc2a9 DC |
307 | |
308 | while (len > 0 && *valuelen > 0) { | |
309 | int hdr_size; | |
ff105f75 | 310 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, blksize); |
f08bc2a9 DC |
311 | |
312 | byte_cnt = min(*valuelen, byte_cnt); | |
313 | hdr_size = xfs_attr3_rmt_hdr_set(mp, dst, ino, *offset, | |
314 | byte_cnt, bno); | |
315 | ||
316 | memcpy(dst + hdr_size, *src, byte_cnt); | |
317 | ||
318 | /* | |
319 | * If this is the last block, zero the remainder of it. | |
320 | * Check that we are actually the last block, too. | |
321 | */ | |
ff105f75 | 322 | if (byte_cnt + hdr_size < blksize) { |
f08bc2a9 | 323 | ASSERT(*valuelen - byte_cnt == 0); |
ff105f75 | 324 | ASSERT(len == blksize); |
f08bc2a9 | 325 | memset(dst + hdr_size + byte_cnt, 0, |
ff105f75 | 326 | blksize - hdr_size - byte_cnt); |
f08bc2a9 DC |
327 | } |
328 | ||
329 | /* roll buffer forwards */ | |
ff105f75 DC |
330 | len -= blksize; |
331 | dst += blksize; | |
332 | bno += BTOBB(blksize); | |
f08bc2a9 DC |
333 | |
334 | /* roll attribute data forwards */ | |
335 | *valuelen -= byte_cnt; | |
336 | *src += byte_cnt; | |
337 | *offset += byte_cnt; | |
338 | } | |
59915981 DC |
339 | } |
340 | ||
9d6fabc0 DC |
341 | /* |
342 | * Read the value associated with an attribute from the out-of-line buffer | |
343 | * that we stored it in. | |
344 | */ | |
345 | int | |
59915981 DC |
346 | xfs_attr_rmtval_get( |
347 | struct xfs_da_args *args) | |
9d6fabc0 | 348 | { |
59915981 DC |
349 | struct xfs_bmbt_irec map[ATTR_RMTVALUE_MAPSIZE]; |
350 | struct xfs_mount *mp = args->dp->i_mount; | |
351 | struct xfs_buf *bp; | |
59915981 | 352 | xfs_dablk_t lblkno = args->rmtblkno; |
4a492e72 | 353 | uint8_t *dst = args->value; |
ff105f75 | 354 | int valuelen; |
59915981 DC |
355 | int nmap; |
356 | int error; | |
f08bc2a9 | 357 | int blkcnt = args->rmtblkcnt; |
59915981 DC |
358 | int i; |
359 | int offset = 0; | |
9d6fabc0 DC |
360 | |
361 | trace_xfs_attr_rmtval_get(args); | |
362 | ||
363 | ASSERT(!(args->flags & ATTR_KERNOVAL)); | |
ff105f75 | 364 | ASSERT(args->rmtvaluelen == args->valuelen); |
9d6fabc0 | 365 | |
ff105f75 | 366 | valuelen = args->rmtvaluelen; |
9d6fabc0 DC |
367 | while (valuelen > 0) { |
368 | nmap = ATTR_RMTVALUE_MAPSIZE; | |
369 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
72e78b51 | 370 | blkcnt, map, &nmap, |
9d6fabc0 DC |
371 | XFS_BMAPI_ATTRFORK); |
372 | if (error) | |
59915981 | 373 | return error; |
9d6fabc0 DC |
374 | ASSERT(nmap >= 1); |
375 | ||
376 | for (i = 0; (i < nmap) && (valuelen > 0); i++) { | |
f08bc2a9 DC |
377 | xfs_daddr_t dblkno; |
378 | int dblkcnt; | |
59915981 | 379 | |
9d6fabc0 DC |
380 | ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && |
381 | (map[i].br_startblock != HOLESTARTBLOCK)); | |
382 | dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); | |
f08bc2a9 | 383 | dblkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
b2d5ffd5 DW |
384 | error = xfs_trans_read_buf(mp, args->trans, |
385 | mp->m_ddev_targp, | |
f08bc2a9 | 386 | dblkno, dblkcnt, 0, &bp, |
59915981 | 387 | &xfs_attr3_rmt_buf_ops); |
9d6fabc0 | 388 | if (error) |
59915981 DC |
389 | return error; |
390 | ||
f08bc2a9 DC |
391 | error = xfs_attr_rmtval_copyout(mp, bp, args->dp->i_ino, |
392 | &offset, &valuelen, | |
393 | &dst); | |
b2d5ffd5 | 394 | xfs_trans_brelse(args->trans, bp); |
f08bc2a9 DC |
395 | if (error) |
396 | return error; | |
59915981 | 397 | |
f08bc2a9 | 398 | /* roll attribute extent map forwards */ |
9d6fabc0 | 399 | lblkno += map[i].br_blockcount; |
f08bc2a9 | 400 | blkcnt -= map[i].br_blockcount; |
9d6fabc0 DC |
401 | } |
402 | } | |
403 | ASSERT(valuelen == 0); | |
59915981 | 404 | return 0; |
9d6fabc0 DC |
405 | } |
406 | ||
407 | /* | |
408 | * Write the value associated with an attribute into the out-of-line buffer | |
409 | * that we have defined for it. | |
410 | */ | |
411 | int | |
59915981 DC |
412 | xfs_attr_rmtval_set( |
413 | struct xfs_da_args *args) | |
9d6fabc0 | 414 | { |
59915981 DC |
415 | struct xfs_inode *dp = args->dp; |
416 | struct xfs_mount *mp = dp->i_mount; | |
417 | struct xfs_bmbt_irec map; | |
59915981 DC |
418 | xfs_dablk_t lblkno; |
419 | xfs_fileoff_t lfileoff = 0; | |
4a492e72 | 420 | uint8_t *src = args->value; |
59915981 DC |
421 | int blkcnt; |
422 | int valuelen; | |
423 | int nmap; | |
424 | int error; | |
59915981 | 425 | int offset = 0; |
9d6fabc0 DC |
426 | |
427 | trace_xfs_attr_rmtval_set(args); | |
428 | ||
9d6fabc0 DC |
429 | /* |
430 | * Find a "hole" in the attribute address space large enough for | |
59915981 DC |
431 | * us to drop the new attribute's value into. Because CRC enable |
432 | * attributes have headers, we can't just do a straight byte to FSB | |
f08bc2a9 | 433 | * conversion and have to take the header space into account. |
9d6fabc0 | 434 | */ |
ff105f75 | 435 | blkcnt = xfs_attr3_rmt_blocks(mp, args->rmtvaluelen); |
9d6fabc0 DC |
436 | error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, |
437 | XFS_ATTR_FORK); | |
59915981 DC |
438 | if (error) |
439 | return error; | |
440 | ||
9d6fabc0 DC |
441 | args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff; |
442 | args->rmtblkcnt = blkcnt; | |
443 | ||
444 | /* | |
445 | * Roll through the "value", allocating blocks on disk as required. | |
446 | */ | |
447 | while (blkcnt > 0) { | |
448 | /* | |
449 | * Allocate a single extent, up to the size of the value. | |
92a57a69 DC |
450 | * |
451 | * Note that we have to consider this a data allocation as we | |
452 | * write the remote attribute without logging the contents. | |
453 | * Hence we must ensure that we aren't using blocks that are on | |
454 | * the busy list so that we don't overwrite blocks which have | |
455 | * recently been freed but their transactions are not yet | |
456 | * committed to disk. If we overwrite the contents of a busy | |
457 | * extent and then crash then the block may not contain the | |
458 | * correct metadata after log recovery occurs. | |
9d6fabc0 | 459 | */ |
f33cea1a | 460 | xfs_defer_init(args->dfops, args->firstblock); |
9d6fabc0 DC |
461 | nmap = 1; |
462 | error = xfs_bmapi_write(args->trans, dp, (xfs_fileoff_t)lblkno, | |
92a57a69 | 463 | blkcnt, XFS_BMAPI_ATTRFORK, args->firstblock, |
f33cea1a | 464 | args->total, &map, &nmap, args->dfops); |
5c33baee CH |
465 | if (error) |
466 | goto out_defer_cancel; | |
467 | xfs_defer_ijoin(args->dfops, dp); | |
468 | error = xfs_defer_finish(&args->trans, args->dfops); | |
469 | if (error) | |
470 | goto out_defer_cancel; | |
9d6fabc0 | 471 | |
9d6fabc0 DC |
472 | ASSERT(nmap == 1); |
473 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
474 | (map.br_startblock != HOLESTARTBLOCK)); | |
475 | lblkno += map.br_blockcount; | |
476 | blkcnt -= map.br_blockcount; | |
477 | ||
478 | /* | |
479 | * Start the next trans in the chain. | |
480 | */ | |
d67406c9 | 481 | error = xfs_trans_roll_inode(&args->trans, dp); |
9d6fabc0 | 482 | if (error) |
af43ca9f | 483 | return error; |
9d6fabc0 DC |
484 | } |
485 | ||
486 | /* | |
487 | * Roll through the "value", copying the attribute value to the | |
488 | * already-allocated blocks. Blocks are written synchronously | |
489 | * so that we can know they are all on disk before we turn off | |
490 | * the INCOMPLETE flag. | |
491 | */ | |
492 | lblkno = args->rmtblkno; | |
4da23ca6 | 493 | blkcnt = args->rmtblkcnt; |
ff105f75 | 494 | valuelen = args->rmtvaluelen; |
9d6fabc0 | 495 | while (valuelen > 0) { |
f08bc2a9 DC |
496 | struct xfs_buf *bp; |
497 | xfs_daddr_t dblkno; | |
498 | int dblkcnt; | |
499 | ||
500 | ASSERT(blkcnt > 0); | |
9d6fabc0 | 501 | |
f33cea1a | 502 | xfs_defer_init(args->dfops, args->firstblock); |
9d6fabc0 DC |
503 | nmap = 1; |
504 | error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno, | |
4da23ca6 | 505 | blkcnt, &map, &nmap, |
9d6fabc0 DC |
506 | XFS_BMAPI_ATTRFORK); |
507 | if (error) | |
af43ca9f | 508 | return error; |
9d6fabc0 DC |
509 | ASSERT(nmap == 1); |
510 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
511 | (map.br_startblock != HOLESTARTBLOCK)); | |
512 | ||
513 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
4da23ca6 | 514 | dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
9d6fabc0 | 515 | |
4da23ca6 | 516 | bp = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt, 0); |
9d6fabc0 | 517 | if (!bp) |
12b53197 | 518 | return -ENOMEM; |
59915981 DC |
519 | bp->b_ops = &xfs_attr3_rmt_buf_ops; |
520 | ||
f08bc2a9 DC |
521 | xfs_attr_rmtval_copyin(mp, bp, args->dp->i_ino, &offset, |
522 | &valuelen, &src); | |
9d6fabc0 DC |
523 | |
524 | error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */ | |
525 | xfs_buf_relse(bp); | |
526 | if (error) | |
527 | return error; | |
59915981 | 528 | |
9d6fabc0 | 529 | |
f08bc2a9 | 530 | /* roll attribute extent map forwards */ |
9d6fabc0 | 531 | lblkno += map.br_blockcount; |
4da23ca6 | 532 | blkcnt -= map.br_blockcount; |
9d6fabc0 DC |
533 | } |
534 | ASSERT(valuelen == 0); | |
59915981 | 535 | return 0; |
5c33baee CH |
536 | out_defer_cancel: |
537 | xfs_defer_cancel(args->dfops); | |
538 | args->trans = NULL; | |
539 | return error; | |
9d6fabc0 DC |
540 | } |
541 | ||
542 | /* | |
543 | * Remove the value associated with an attribute by deleting the | |
544 | * out-of-line buffer that it is stored on. | |
545 | */ | |
546 | int | |
f08bc2a9 DC |
547 | xfs_attr_rmtval_remove( |
548 | struct xfs_da_args *args) | |
9d6fabc0 | 549 | { |
f08bc2a9 DC |
550 | struct xfs_mount *mp = args->dp->i_mount; |
551 | xfs_dablk_t lblkno; | |
552 | int blkcnt; | |
553 | int error; | |
554 | int done; | |
9d6fabc0 DC |
555 | |
556 | trace_xfs_attr_rmtval_remove(args); | |
557 | ||
9d6fabc0 | 558 | /* |
526f9be5 | 559 | * Roll through the "value", invalidating the attribute value's blocks. |
9d6fabc0 DC |
560 | */ |
561 | lblkno = args->rmtblkno; | |
f08bc2a9 DC |
562 | blkcnt = args->rmtblkcnt; |
563 | while (blkcnt > 0) { | |
564 | struct xfs_bmbt_irec map; | |
565 | struct xfs_buf *bp; | |
566 | xfs_daddr_t dblkno; | |
567 | int dblkcnt; | |
568 | int nmap; | |
526f9be5 | 569 | |
9d6fabc0 DC |
570 | /* |
571 | * Try to remember where we decided to put the value. | |
572 | */ | |
573 | nmap = 1; | |
574 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
526f9be5 | 575 | blkcnt, &map, &nmap, XFS_BMAPI_ATTRFORK); |
9d6fabc0 | 576 | if (error) |
af43ca9f | 577 | return error; |
9d6fabc0 DC |
578 | ASSERT(nmap == 1); |
579 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
580 | (map.br_startblock != HOLESTARTBLOCK)); | |
581 | ||
582 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
526f9be5 | 583 | dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
9d6fabc0 DC |
584 | |
585 | /* | |
586 | * If the "remote" value is in the cache, remove it. | |
587 | */ | |
526f9be5 | 588 | bp = xfs_incore(mp->m_ddev_targp, dblkno, dblkcnt, XBF_TRYLOCK); |
9d6fabc0 DC |
589 | if (bp) { |
590 | xfs_buf_stale(bp); | |
591 | xfs_buf_relse(bp); | |
592 | bp = NULL; | |
593 | } | |
594 | ||
9d6fabc0 | 595 | lblkno += map.br_blockcount; |
526f9be5 | 596 | blkcnt -= map.br_blockcount; |
9d6fabc0 DC |
597 | } |
598 | ||
599 | /* | |
600 | * Keep de-allocating extents until the remote-value region is gone. | |
601 | */ | |
602 | lblkno = args->rmtblkno; | |
f08bc2a9 | 603 | blkcnt = args->rmtblkcnt; |
9d6fabc0 DC |
604 | done = 0; |
605 | while (!done) { | |
f33cea1a | 606 | xfs_defer_init(args->dfops, args->firstblock); |
9d6fabc0 | 607 | error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt, |
db9cba4e | 608 | XFS_BMAPI_ATTRFORK, 1, args->firstblock, |
f33cea1a | 609 | args->dfops, &done); |
5c33baee CH |
610 | if (error) |
611 | goto out_defer_cancel; | |
612 | xfs_defer_ijoin(args->dfops, args->dp); | |
613 | error = xfs_defer_finish(&args->trans, args->dfops); | |
614 | if (error) | |
615 | goto out_defer_cancel; | |
9d6fabc0 | 616 | |
9d6fabc0 DC |
617 | /* |
618 | * Close out trans and start the next one in the chain. | |
619 | */ | |
d67406c9 | 620 | error = xfs_trans_roll_inode(&args->trans, args->dp); |
9d6fabc0 | 621 | if (error) |
af43ca9f | 622 | return error; |
9d6fabc0 | 623 | } |
af43ca9f | 624 | return 0; |
5c33baee CH |
625 | out_defer_cancel: |
626 | xfs_defer_cancel(args->dfops); | |
627 | args->trans = NULL; | |
628 | return error; | |
9d6fabc0 | 629 | } |