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95920cd6 DC |
1 | /* |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. | |
d2e448d5 | 3 | * Copyright (c) 2013 Red Hat, Inc. |
95920cd6 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 | */ | |
19 | #include "xfs.h" | |
20 | #include "xfs_fs.h" | |
632b89e8 | 21 | #include "xfs_shared.h" |
a4fbe6ab | 22 | #include "xfs_format.h" |
239880ef DC |
23 | #include "xfs_log_format.h" |
24 | #include "xfs_trans_resv.h" | |
95920cd6 | 25 | #include "xfs_bit.h" |
95920cd6 DC |
26 | #include "xfs_sb.h" |
27 | #include "xfs_ag.h" | |
28 | #include "xfs_mount.h" | |
57062787 | 29 | #include "xfs_da_format.h" |
95920cd6 | 30 | #include "xfs_da_btree.h" |
95920cd6 DC |
31 | #include "xfs_inode.h" |
32 | #include "xfs_alloc.h" | |
239880ef | 33 | #include "xfs_trans.h" |
95920cd6 DC |
34 | #include "xfs_inode_item.h" |
35 | #include "xfs_bmap.h" | |
68988114 | 36 | #include "xfs_bmap_util.h" |
95920cd6 DC |
37 | #include "xfs_attr.h" |
38 | #include "xfs_attr_leaf.h" | |
39 | #include "xfs_attr_remote.h" | |
40 | #include "xfs_trans_space.h" | |
41 | #include "xfs_trace.h" | |
d2e448d5 DC |
42 | #include "xfs_cksum.h" |
43 | #include "xfs_buf_item.h" | |
a4fbe6ab | 44 | #include "xfs_error.h" |
95920cd6 DC |
45 | |
46 | #define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */ | |
47 | ||
d2e448d5 DC |
48 | /* |
49 | * Each contiguous block has a header, so it is not just a simple attribute | |
50 | * length to FSB conversion. | |
51 | */ | |
7bc0dc27 | 52 | int |
d2e448d5 DC |
53 | xfs_attr3_rmt_blocks( |
54 | struct xfs_mount *mp, | |
55 | int attrlen) | |
56 | { | |
551b382f DC |
57 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
58 | int buflen = XFS_ATTR3_RMT_BUF_SPACE(mp, mp->m_sb.sb_blocksize); | |
59 | return (attrlen + buflen - 1) / buflen; | |
60 | } | |
61 | return XFS_B_TO_FSB(mp, attrlen); | |
d2e448d5 DC |
62 | } |
63 | ||
7bc0dc27 DC |
64 | /* |
65 | * Checking of the remote attribute header is split into two parts. The verifier | |
66 | * does CRC, location and bounds checking, the unpacking function checks the | |
67 | * attribute parameters and owner. | |
68 | */ | |
69 | static bool | |
70 | xfs_attr3_rmt_hdr_ok( | |
71 | struct xfs_mount *mp, | |
72 | void *ptr, | |
73 | xfs_ino_t ino, | |
74 | uint32_t offset, | |
75 | uint32_t size, | |
76 | xfs_daddr_t bno) | |
77 | { | |
78 | struct xfs_attr3_rmt_hdr *rmt = ptr; | |
79 | ||
80 | if (bno != be64_to_cpu(rmt->rm_blkno)) | |
81 | return false; | |
82 | if (offset != be32_to_cpu(rmt->rm_offset)) | |
83 | return false; | |
84 | if (size != be32_to_cpu(rmt->rm_bytes)) | |
85 | return false; | |
86 | if (ino != be64_to_cpu(rmt->rm_owner)) | |
87 | return false; | |
88 | ||
89 | /* ok */ | |
90 | return true; | |
91 | } | |
92 | ||
d2e448d5 DC |
93 | static bool |
94 | xfs_attr3_rmt_verify( | |
7bc0dc27 DC |
95 | struct xfs_mount *mp, |
96 | void *ptr, | |
97 | int fsbsize, | |
98 | xfs_daddr_t bno) | |
d2e448d5 | 99 | { |
7bc0dc27 | 100 | struct xfs_attr3_rmt_hdr *rmt = ptr; |
d2e448d5 DC |
101 | |
102 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
103 | return false; | |
104 | if (rmt->rm_magic != cpu_to_be32(XFS_ATTR3_RMT_MAGIC)) | |
105 | return false; | |
106 | if (!uuid_equal(&rmt->rm_uuid, &mp->m_sb.sb_uuid)) | |
107 | return false; | |
7bc0dc27 DC |
108 | if (be64_to_cpu(rmt->rm_blkno) != bno) |
109 | return false; | |
110 | if (be32_to_cpu(rmt->rm_bytes) > fsbsize - sizeof(*rmt)) | |
d2e448d5 DC |
111 | return false; |
112 | if (be32_to_cpu(rmt->rm_offset) + | |
bba719b5 | 113 | be32_to_cpu(rmt->rm_bytes) > XATTR_SIZE_MAX) |
d2e448d5 DC |
114 | return false; |
115 | if (rmt->rm_owner == 0) | |
116 | return false; | |
117 | ||
118 | return true; | |
119 | } | |
120 | ||
121 | static void | |
122 | xfs_attr3_rmt_read_verify( | |
123 | struct xfs_buf *bp) | |
124 | { | |
125 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
7bc0dc27 DC |
126 | char *ptr; |
127 | int len; | |
7bc0dc27 | 128 | xfs_daddr_t bno; |
d2e448d5 DC |
129 | |
130 | /* no verification of non-crc buffers */ | |
131 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
132 | return; | |
133 | ||
7bc0dc27 DC |
134 | ptr = bp->b_addr; |
135 | bno = bp->b_bn; | |
136 | len = BBTOB(bp->b_length); | |
137 | ASSERT(len >= XFS_LBSIZE(mp)); | |
138 | ||
139 | while (len > 0) { | |
140 | if (!xfs_verify_cksum(ptr, XFS_LBSIZE(mp), | |
141 | XFS_ATTR3_RMT_CRC_OFF)) { | |
ce5028cf | 142 | xfs_buf_ioerror(bp, EFSBADCRC); |
7bc0dc27 DC |
143 | break; |
144 | } | |
145 | if (!xfs_attr3_rmt_verify(mp, ptr, XFS_LBSIZE(mp), bno)) { | |
ce5028cf | 146 | xfs_buf_ioerror(bp, EFSCORRUPTED); |
7bc0dc27 DC |
147 | break; |
148 | } | |
149 | len -= XFS_LBSIZE(mp); | |
150 | ptr += XFS_LBSIZE(mp); | |
151 | bno += mp->m_bsize; | |
152 | } | |
153 | ||
ce5028cf ES |
154 | if (bp->b_error) |
155 | xfs_verifier_error(bp); | |
156 | else | |
7bc0dc27 | 157 | ASSERT(len == 0); |
d2e448d5 DC |
158 | } |
159 | ||
160 | static void | |
161 | xfs_attr3_rmt_write_verify( | |
162 | struct xfs_buf *bp) | |
163 | { | |
164 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
165 | struct xfs_buf_log_item *bip = bp->b_fspriv; | |
7bc0dc27 DC |
166 | char *ptr; |
167 | int len; | |
168 | xfs_daddr_t bno; | |
d2e448d5 DC |
169 | |
170 | /* no verification of non-crc buffers */ | |
171 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
172 | return; | |
173 | ||
7bc0dc27 DC |
174 | ptr = bp->b_addr; |
175 | bno = bp->b_bn; | |
176 | len = BBTOB(bp->b_length); | |
177 | ASSERT(len >= XFS_LBSIZE(mp)); | |
178 | ||
179 | while (len > 0) { | |
180 | if (!xfs_attr3_rmt_verify(mp, ptr, XFS_LBSIZE(mp), bno)) { | |
7bc0dc27 | 181 | xfs_buf_ioerror(bp, EFSCORRUPTED); |
ce5028cf | 182 | xfs_verifier_error(bp); |
7bc0dc27 DC |
183 | return; |
184 | } | |
185 | if (bip) { | |
186 | struct xfs_attr3_rmt_hdr *rmt; | |
d2e448d5 | 187 | |
7bc0dc27 DC |
188 | rmt = (struct xfs_attr3_rmt_hdr *)ptr; |
189 | rmt->rm_lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
190 | } | |
191 | xfs_update_cksum(ptr, XFS_LBSIZE(mp), XFS_ATTR3_RMT_CRC_OFF); | |
192 | ||
193 | len -= XFS_LBSIZE(mp); | |
194 | ptr += XFS_LBSIZE(mp); | |
195 | bno += mp->m_bsize; | |
d2e448d5 | 196 | } |
7bc0dc27 | 197 | ASSERT(len == 0); |
d2e448d5 DC |
198 | } |
199 | ||
200 | const struct xfs_buf_ops xfs_attr3_rmt_buf_ops = { | |
201 | .verify_read = xfs_attr3_rmt_read_verify, | |
202 | .verify_write = xfs_attr3_rmt_write_verify, | |
203 | }; | |
204 | ||
7bc0dc27 | 205 | STATIC int |
d2e448d5 DC |
206 | xfs_attr3_rmt_hdr_set( |
207 | struct xfs_mount *mp, | |
7bc0dc27 | 208 | void *ptr, |
d2e448d5 DC |
209 | xfs_ino_t ino, |
210 | uint32_t offset, | |
211 | uint32_t size, | |
7bc0dc27 | 212 | xfs_daddr_t bno) |
d2e448d5 | 213 | { |
7bc0dc27 | 214 | struct xfs_attr3_rmt_hdr *rmt = ptr; |
d2e448d5 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); | |
222 | uuid_copy(&rmt->rm_uuid, &mp->m_sb.sb_uuid); | |
223 | rmt->rm_owner = cpu_to_be64(ino); | |
7bc0dc27 | 224 | rmt->rm_blkno = cpu_to_be64(bno); |
d2e448d5 DC |
225 | |
226 | return sizeof(struct xfs_attr3_rmt_hdr); | |
227 | } | |
228 | ||
229 | /* | |
7bc0dc27 | 230 | * Helper functions to copy attribute data in and out of the one disk extents |
d2e448d5 | 231 | */ |
7bc0dc27 DC |
232 | STATIC int |
233 | xfs_attr_rmtval_copyout( | |
234 | struct xfs_mount *mp, | |
235 | struct xfs_buf *bp, | |
236 | xfs_ino_t ino, | |
237 | int *offset, | |
238 | int *valuelen, | |
836a94ad | 239 | __uint8_t **dst) |
d2e448d5 | 240 | { |
7bc0dc27 DC |
241 | char *src = bp->b_addr; |
242 | xfs_daddr_t bno = bp->b_bn; | |
243 | int len = BBTOB(bp->b_length); | |
d2e448d5 | 244 | |
7bc0dc27 | 245 | ASSERT(len >= XFS_LBSIZE(mp)); |
d2e448d5 | 246 | |
7bc0dc27 DC |
247 | while (len > 0 && *valuelen > 0) { |
248 | int hdr_size = 0; | |
249 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, XFS_LBSIZE(mp)); | |
250 | ||
c5c249b4 | 251 | byte_cnt = min(*valuelen, byte_cnt); |
7bc0dc27 DC |
252 | |
253 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
254 | if (!xfs_attr3_rmt_hdr_ok(mp, src, ino, *offset, | |
255 | byte_cnt, bno)) { | |
256 | xfs_alert(mp, | |
257 | "remote attribute header mismatch bno/off/len/owner (0x%llx/0x%x/Ox%x/0x%llx)", | |
258 | bno, *offset, byte_cnt, ino); | |
259 | return EFSCORRUPTED; | |
260 | } | |
261 | hdr_size = sizeof(struct xfs_attr3_rmt_hdr); | |
262 | } | |
263 | ||
264 | memcpy(*dst, src + hdr_size, byte_cnt); | |
265 | ||
266 | /* roll buffer forwards */ | |
267 | len -= XFS_LBSIZE(mp); | |
268 | src += XFS_LBSIZE(mp); | |
269 | bno += mp->m_bsize; | |
270 | ||
271 | /* roll attribute data forwards */ | |
272 | *valuelen -= byte_cnt; | |
273 | *dst += byte_cnt; | |
274 | *offset += byte_cnt; | |
275 | } | |
276 | return 0; | |
277 | } | |
278 | ||
279 | STATIC void | |
280 | xfs_attr_rmtval_copyin( | |
281 | struct xfs_mount *mp, | |
282 | struct xfs_buf *bp, | |
283 | xfs_ino_t ino, | |
284 | int *offset, | |
285 | int *valuelen, | |
836a94ad | 286 | __uint8_t **src) |
7bc0dc27 DC |
287 | { |
288 | char *dst = bp->b_addr; | |
289 | xfs_daddr_t bno = bp->b_bn; | |
290 | int len = BBTOB(bp->b_length); | |
291 | ||
292 | ASSERT(len >= XFS_LBSIZE(mp)); | |
293 | ||
294 | while (len > 0 && *valuelen > 0) { | |
295 | int hdr_size; | |
296 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, XFS_LBSIZE(mp)); | |
297 | ||
298 | byte_cnt = min(*valuelen, byte_cnt); | |
299 | hdr_size = xfs_attr3_rmt_hdr_set(mp, dst, ino, *offset, | |
300 | byte_cnt, bno); | |
301 | ||
302 | memcpy(dst + hdr_size, *src, byte_cnt); | |
303 | ||
304 | /* | |
305 | * If this is the last block, zero the remainder of it. | |
306 | * Check that we are actually the last block, too. | |
307 | */ | |
308 | if (byte_cnt + hdr_size < XFS_LBSIZE(mp)) { | |
309 | ASSERT(*valuelen - byte_cnt == 0); | |
310 | ASSERT(len == XFS_LBSIZE(mp)); | |
311 | memset(dst + hdr_size + byte_cnt, 0, | |
312 | XFS_LBSIZE(mp) - hdr_size - byte_cnt); | |
313 | } | |
314 | ||
315 | /* roll buffer forwards */ | |
316 | len -= XFS_LBSIZE(mp); | |
317 | dst += XFS_LBSIZE(mp); | |
318 | bno += mp->m_bsize; | |
319 | ||
320 | /* roll attribute data forwards */ | |
321 | *valuelen -= byte_cnt; | |
322 | *src += byte_cnt; | |
323 | *offset += byte_cnt; | |
324 | } | |
d2e448d5 DC |
325 | } |
326 | ||
95920cd6 DC |
327 | /* |
328 | * Read the value associated with an attribute from the out-of-line buffer | |
329 | * that we stored it in. | |
330 | */ | |
331 | int | |
d2e448d5 DC |
332 | xfs_attr_rmtval_get( |
333 | struct xfs_da_args *args) | |
95920cd6 | 334 | { |
d2e448d5 DC |
335 | struct xfs_bmbt_irec map[ATTR_RMTVALUE_MAPSIZE]; |
336 | struct xfs_mount *mp = args->dp->i_mount; | |
337 | struct xfs_buf *bp; | |
d2e448d5 | 338 | xfs_dablk_t lblkno = args->rmtblkno; |
836a94ad | 339 | __uint8_t *dst = args->value; |
d2e448d5 DC |
340 | int valuelen = args->valuelen; |
341 | int nmap; | |
342 | int error; | |
7bc0dc27 | 343 | int blkcnt = args->rmtblkcnt; |
d2e448d5 DC |
344 | int i; |
345 | int offset = 0; | |
95920cd6 DC |
346 | |
347 | trace_xfs_attr_rmtval_get(args); | |
348 | ||
349 | ASSERT(!(args->flags & ATTR_KERNOVAL)); | |
350 | ||
95920cd6 DC |
351 | while (valuelen > 0) { |
352 | nmap = ATTR_RMTVALUE_MAPSIZE; | |
353 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
551b382f | 354 | blkcnt, map, &nmap, |
95920cd6 DC |
355 | XFS_BMAPI_ATTRFORK); |
356 | if (error) | |
d2e448d5 | 357 | return error; |
95920cd6 DC |
358 | ASSERT(nmap >= 1); |
359 | ||
360 | for (i = 0; (i < nmap) && (valuelen > 0); i++) { | |
7bc0dc27 DC |
361 | xfs_daddr_t dblkno; |
362 | int dblkcnt; | |
d2e448d5 | 363 | |
95920cd6 DC |
364 | ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && |
365 | (map[i].br_startblock != HOLESTARTBLOCK)); | |
366 | dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); | |
7bc0dc27 | 367 | dblkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
95920cd6 | 368 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, |
7bc0dc27 | 369 | dblkno, dblkcnt, 0, &bp, |
d2e448d5 | 370 | &xfs_attr3_rmt_buf_ops); |
95920cd6 | 371 | if (error) |
d2e448d5 DC |
372 | return error; |
373 | ||
7bc0dc27 DC |
374 | error = xfs_attr_rmtval_copyout(mp, bp, args->dp->i_ino, |
375 | &offset, &valuelen, | |
376 | &dst); | |
95920cd6 | 377 | xfs_buf_relse(bp); |
7bc0dc27 DC |
378 | if (error) |
379 | return error; | |
d2e448d5 | 380 | |
7bc0dc27 | 381 | /* roll attribute extent map forwards */ |
95920cd6 | 382 | lblkno += map[i].br_blockcount; |
7bc0dc27 | 383 | blkcnt -= map[i].br_blockcount; |
95920cd6 DC |
384 | } |
385 | } | |
386 | ASSERT(valuelen == 0); | |
d2e448d5 | 387 | return 0; |
95920cd6 DC |
388 | } |
389 | ||
390 | /* | |
391 | * Write the value associated with an attribute into the out-of-line buffer | |
392 | * that we have defined for it. | |
393 | */ | |
394 | int | |
d2e448d5 DC |
395 | xfs_attr_rmtval_set( |
396 | struct xfs_da_args *args) | |
95920cd6 | 397 | { |
d2e448d5 DC |
398 | struct xfs_inode *dp = args->dp; |
399 | struct xfs_mount *mp = dp->i_mount; | |
400 | struct xfs_bmbt_irec map; | |
d2e448d5 DC |
401 | xfs_dablk_t lblkno; |
402 | xfs_fileoff_t lfileoff = 0; | |
836a94ad | 403 | __uint8_t *src = args->value; |
d2e448d5 DC |
404 | int blkcnt; |
405 | int valuelen; | |
406 | int nmap; | |
407 | int error; | |
d2e448d5 | 408 | int offset = 0; |
95920cd6 DC |
409 | |
410 | trace_xfs_attr_rmtval_set(args); | |
411 | ||
95920cd6 DC |
412 | /* |
413 | * Find a "hole" in the attribute address space large enough for | |
d2e448d5 DC |
414 | * us to drop the new attribute's value into. Because CRC enable |
415 | * attributes have headers, we can't just do a straight byte to FSB | |
7bc0dc27 | 416 | * conversion and have to take the header space into account. |
95920cd6 | 417 | */ |
26f71445 | 418 | blkcnt = xfs_attr3_rmt_blocks(mp, args->valuelen); |
95920cd6 DC |
419 | error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, |
420 | XFS_ATTR_FORK); | |
d2e448d5 DC |
421 | if (error) |
422 | return error; | |
423 | ||
95920cd6 DC |
424 | args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff; |
425 | args->rmtblkcnt = blkcnt; | |
426 | ||
427 | /* | |
428 | * Roll through the "value", allocating blocks on disk as required. | |
429 | */ | |
430 | while (blkcnt > 0) { | |
d2e448d5 DC |
431 | int committed; |
432 | ||
95920cd6 DC |
433 | /* |
434 | * Allocate a single extent, up to the size of the value. | |
435 | */ | |
436 | xfs_bmap_init(args->flist, args->firstblock); | |
437 | nmap = 1; | |
438 | error = xfs_bmapi_write(args->trans, dp, (xfs_fileoff_t)lblkno, | |
439 | blkcnt, | |
440 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, | |
441 | args->firstblock, args->total, &map, &nmap, | |
442 | args->flist); | |
443 | if (!error) { | |
444 | error = xfs_bmap_finish(&args->trans, args->flist, | |
445 | &committed); | |
446 | } | |
447 | if (error) { | |
448 | ASSERT(committed); | |
449 | args->trans = NULL; | |
450 | xfs_bmap_cancel(args->flist); | |
451 | return(error); | |
452 | } | |
453 | ||
454 | /* | |
455 | * bmap_finish() may have committed the last trans and started | |
456 | * a new one. We need the inode to be in all transactions. | |
457 | */ | |
458 | if (committed) | |
459 | xfs_trans_ijoin(args->trans, dp, 0); | |
460 | ||
461 | ASSERT(nmap == 1); | |
462 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
463 | (map.br_startblock != HOLESTARTBLOCK)); | |
464 | lblkno += map.br_blockcount; | |
465 | blkcnt -= map.br_blockcount; | |
466 | ||
467 | /* | |
468 | * Start the next trans in the chain. | |
469 | */ | |
470 | error = xfs_trans_roll(&args->trans, dp); | |
471 | if (error) | |
472 | return (error); | |
473 | } | |
474 | ||
475 | /* | |
476 | * Roll through the "value", copying the attribute value to the | |
477 | * already-allocated blocks. Blocks are written synchronously | |
478 | * so that we can know they are all on disk before we turn off | |
479 | * the INCOMPLETE flag. | |
480 | */ | |
481 | lblkno = args->rmtblkno; | |
26f71445 | 482 | blkcnt = args->rmtblkcnt; |
7bc0dc27 | 483 | valuelen = args->valuelen; |
95920cd6 | 484 | while (valuelen > 0) { |
7bc0dc27 DC |
485 | struct xfs_buf *bp; |
486 | xfs_daddr_t dblkno; | |
487 | int dblkcnt; | |
488 | ||
489 | ASSERT(blkcnt > 0); | |
95920cd6 | 490 | |
95920cd6 DC |
491 | xfs_bmap_init(args->flist, args->firstblock); |
492 | nmap = 1; | |
493 | error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno, | |
26f71445 | 494 | blkcnt, &map, &nmap, |
95920cd6 DC |
495 | XFS_BMAPI_ATTRFORK); |
496 | if (error) | |
497 | return(error); | |
498 | ASSERT(nmap == 1); | |
499 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
500 | (map.br_startblock != HOLESTARTBLOCK)); | |
501 | ||
502 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
26f71445 | 503 | dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
95920cd6 | 504 | |
26f71445 | 505 | bp = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt, 0); |
95920cd6 DC |
506 | if (!bp) |
507 | return ENOMEM; | |
d2e448d5 | 508 | bp->b_ops = &xfs_attr3_rmt_buf_ops; |
26f71445 | 509 | |
7bc0dc27 DC |
510 | xfs_attr_rmtval_copyin(mp, bp, args->dp->i_ino, &offset, |
511 | &valuelen, &src); | |
95920cd6 DC |
512 | |
513 | error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */ | |
514 | xfs_buf_relse(bp); | |
515 | if (error) | |
516 | return error; | |
d2e448d5 | 517 | |
95920cd6 | 518 | |
7bc0dc27 | 519 | /* roll attribute extent map forwards */ |
95920cd6 | 520 | lblkno += map.br_blockcount; |
26f71445 | 521 | blkcnt -= map.br_blockcount; |
95920cd6 DC |
522 | } |
523 | ASSERT(valuelen == 0); | |
d2e448d5 | 524 | return 0; |
95920cd6 DC |
525 | } |
526 | ||
527 | /* | |
528 | * Remove the value associated with an attribute by deleting the | |
529 | * out-of-line buffer that it is stored on. | |
530 | */ | |
531 | int | |
7bc0dc27 DC |
532 | xfs_attr_rmtval_remove( |
533 | struct xfs_da_args *args) | |
95920cd6 | 534 | { |
7bc0dc27 DC |
535 | struct xfs_mount *mp = args->dp->i_mount; |
536 | xfs_dablk_t lblkno; | |
537 | int blkcnt; | |
538 | int error; | |
539 | int done; | |
95920cd6 DC |
540 | |
541 | trace_xfs_attr_rmtval_remove(args); | |
542 | ||
95920cd6 | 543 | /* |
58a72281 | 544 | * Roll through the "value", invalidating the attribute value's blocks. |
95920cd6 DC |
545 | */ |
546 | lblkno = args->rmtblkno; | |
7bc0dc27 DC |
547 | blkcnt = args->rmtblkcnt; |
548 | while (blkcnt > 0) { | |
549 | struct xfs_bmbt_irec map; | |
550 | struct xfs_buf *bp; | |
551 | xfs_daddr_t dblkno; | |
552 | int dblkcnt; | |
553 | int nmap; | |
58a72281 | 554 | |
95920cd6 DC |
555 | /* |
556 | * Try to remember where we decided to put the value. | |
557 | */ | |
558 | nmap = 1; | |
559 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
58a72281 | 560 | blkcnt, &map, &nmap, XFS_BMAPI_ATTRFORK); |
95920cd6 DC |
561 | if (error) |
562 | return(error); | |
563 | ASSERT(nmap == 1); | |
564 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
565 | (map.br_startblock != HOLESTARTBLOCK)); | |
566 | ||
567 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
58a72281 | 568 | dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
95920cd6 DC |
569 | |
570 | /* | |
571 | * If the "remote" value is in the cache, remove it. | |
572 | */ | |
58a72281 | 573 | bp = xfs_incore(mp->m_ddev_targp, dblkno, dblkcnt, XBF_TRYLOCK); |
95920cd6 DC |
574 | if (bp) { |
575 | xfs_buf_stale(bp); | |
576 | xfs_buf_relse(bp); | |
577 | bp = NULL; | |
578 | } | |
579 | ||
95920cd6 | 580 | lblkno += map.br_blockcount; |
58a72281 | 581 | blkcnt -= map.br_blockcount; |
95920cd6 DC |
582 | } |
583 | ||
584 | /* | |
585 | * Keep de-allocating extents until the remote-value region is gone. | |
586 | */ | |
587 | lblkno = args->rmtblkno; | |
7bc0dc27 | 588 | blkcnt = args->rmtblkcnt; |
95920cd6 DC |
589 | done = 0; |
590 | while (!done) { | |
7bc0dc27 DC |
591 | int committed; |
592 | ||
95920cd6 DC |
593 | xfs_bmap_init(args->flist, args->firstblock); |
594 | error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt, | |
595 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, | |
596 | 1, args->firstblock, args->flist, | |
597 | &done); | |
598 | if (!error) { | |
599 | error = xfs_bmap_finish(&args->trans, args->flist, | |
600 | &committed); | |
601 | } | |
602 | if (error) { | |
603 | ASSERT(committed); | |
604 | args->trans = NULL; | |
605 | xfs_bmap_cancel(args->flist); | |
d2e448d5 | 606 | return error; |
95920cd6 DC |
607 | } |
608 | ||
609 | /* | |
610 | * bmap_finish() may have committed the last trans and started | |
611 | * a new one. We need the inode to be in all transactions. | |
612 | */ | |
613 | if (committed) | |
614 | xfs_trans_ijoin(args->trans, args->dp, 0); | |
615 | ||
616 | /* | |
617 | * Close out trans and start the next one in the chain. | |
618 | */ | |
619 | error = xfs_trans_roll(&args->trans, args->dp); | |
620 | if (error) | |
621 | return (error); | |
622 | } | |
623 | return(0); | |
624 | } |