Commit | Line | Data |
---|---|---|
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( | |
7bc0dc27 DC |
71 | void *ptr, |
72 | xfs_ino_t ino, | |
73 | uint32_t offset, | |
74 | uint32_t size, | |
75 | xfs_daddr_t bno) | |
76 | { | |
77 | struct xfs_attr3_rmt_hdr *rmt = ptr; | |
78 | ||
79 | if (bno != be64_to_cpu(rmt->rm_blkno)) | |
80 | return false; | |
81 | if (offset != be32_to_cpu(rmt->rm_offset)) | |
82 | return false; | |
83 | if (size != be32_to_cpu(rmt->rm_bytes)) | |
84 | return false; | |
85 | if (ino != be64_to_cpu(rmt->rm_owner)) | |
86 | return false; | |
87 | ||
88 | /* ok */ | |
89 | return true; | |
90 | } | |
91 | ||
d2e448d5 DC |
92 | static bool |
93 | xfs_attr3_rmt_verify( | |
7bc0dc27 DC |
94 | struct xfs_mount *mp, |
95 | void *ptr, | |
96 | int fsbsize, | |
97 | xfs_daddr_t bno) | |
d2e448d5 | 98 | { |
7bc0dc27 | 99 | struct xfs_attr3_rmt_hdr *rmt = ptr; |
d2e448d5 DC |
100 | |
101 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
102 | return false; | |
103 | if (rmt->rm_magic != cpu_to_be32(XFS_ATTR3_RMT_MAGIC)) | |
104 | return false; | |
105 | if (!uuid_equal(&rmt->rm_uuid, &mp->m_sb.sb_uuid)) | |
106 | return false; | |
7bc0dc27 DC |
107 | if (be64_to_cpu(rmt->rm_blkno) != bno) |
108 | return false; | |
109 | if (be32_to_cpu(rmt->rm_bytes) > fsbsize - sizeof(*rmt)) | |
d2e448d5 DC |
110 | return false; |
111 | if (be32_to_cpu(rmt->rm_offset) + | |
bba719b5 | 112 | be32_to_cpu(rmt->rm_bytes) > XATTR_SIZE_MAX) |
d2e448d5 DC |
113 | return false; |
114 | if (rmt->rm_owner == 0) | |
115 | return false; | |
116 | ||
117 | return true; | |
118 | } | |
119 | ||
120 | static void | |
121 | xfs_attr3_rmt_read_verify( | |
122 | struct xfs_buf *bp) | |
123 | { | |
124 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
7bc0dc27 DC |
125 | char *ptr; |
126 | int len; | |
7bc0dc27 | 127 | xfs_daddr_t bno; |
c2c4c477 | 128 | int blksize = mp->m_attr_geo->blksize; |
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); | |
c2c4c477 | 137 | ASSERT(len >= blksize); |
7bc0dc27 DC |
138 | |
139 | while (len > 0) { | |
c2c4c477 | 140 | if (!xfs_verify_cksum(ptr, blksize, XFS_ATTR3_RMT_CRC_OFF)) { |
2451337d | 141 | xfs_buf_ioerror(bp, -EFSBADCRC); |
7bc0dc27 DC |
142 | break; |
143 | } | |
c2c4c477 | 144 | if (!xfs_attr3_rmt_verify(mp, ptr, blksize, bno)) { |
2451337d | 145 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
7bc0dc27 DC |
146 | break; |
147 | } | |
c2c4c477 DC |
148 | len -= blksize; |
149 | ptr += blksize; | |
150 | bno += BTOBB(blksize); | |
7bc0dc27 DC |
151 | } |
152 | ||
ce5028cf ES |
153 | if (bp->b_error) |
154 | xfs_verifier_error(bp); | |
155 | else | |
7bc0dc27 | 156 | ASSERT(len == 0); |
d2e448d5 DC |
157 | } |
158 | ||
159 | static void | |
160 | xfs_attr3_rmt_write_verify( | |
161 | struct xfs_buf *bp) | |
162 | { | |
163 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
164 | struct xfs_buf_log_item *bip = bp->b_fspriv; | |
7bc0dc27 DC |
165 | char *ptr; |
166 | int len; | |
167 | xfs_daddr_t bno; | |
c2c4c477 | 168 | int blksize = mp->m_attr_geo->blksize; |
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); | |
c2c4c477 | 177 | ASSERT(len >= blksize); |
7bc0dc27 DC |
178 | |
179 | while (len > 0) { | |
c2c4c477 | 180 | if (!xfs_attr3_rmt_verify(mp, ptr, blksize, bno)) { |
2451337d | 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 | } | |
c2c4c477 | 191 | xfs_update_cksum(ptr, blksize, XFS_ATTR3_RMT_CRC_OFF); |
7bc0dc27 | 192 | |
c2c4c477 DC |
193 | len -= blksize; |
194 | ptr += blksize; | |
195 | bno += BTOBB(blksize); | |
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); | |
c2c4c477 | 244 | int blksize = mp->m_attr_geo->blksize; |
d2e448d5 | 245 | |
c2c4c477 | 246 | ASSERT(len >= blksize); |
d2e448d5 | 247 | |
7bc0dc27 DC |
248 | while (len > 0 && *valuelen > 0) { |
249 | int hdr_size = 0; | |
c2c4c477 | 250 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, blksize); |
7bc0dc27 | 251 | |
c5c249b4 | 252 | byte_cnt = min(*valuelen, byte_cnt); |
7bc0dc27 DC |
253 | |
254 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
6d0081a3 | 255 | if (!xfs_attr3_rmt_hdr_ok(src, ino, *offset, |
7bc0dc27 DC |
256 | byte_cnt, bno)) { |
257 | xfs_alert(mp, | |
258 | "remote attribute header mismatch bno/off/len/owner (0x%llx/0x%x/Ox%x/0x%llx)", | |
259 | bno, *offset, byte_cnt, ino); | |
2451337d | 260 | return -EFSCORRUPTED; |
7bc0dc27 DC |
261 | } |
262 | hdr_size = sizeof(struct xfs_attr3_rmt_hdr); | |
263 | } | |
264 | ||
265 | memcpy(*dst, src + hdr_size, byte_cnt); | |
266 | ||
267 | /* roll buffer forwards */ | |
c2c4c477 DC |
268 | len -= blksize; |
269 | src += blksize; | |
270 | bno += BTOBB(blksize); | |
7bc0dc27 DC |
271 | |
272 | /* roll attribute data forwards */ | |
273 | *valuelen -= byte_cnt; | |
274 | *dst += byte_cnt; | |
275 | *offset += byte_cnt; | |
276 | } | |
277 | return 0; | |
278 | } | |
279 | ||
280 | STATIC void | |
281 | xfs_attr_rmtval_copyin( | |
282 | struct xfs_mount *mp, | |
283 | struct xfs_buf *bp, | |
284 | xfs_ino_t ino, | |
285 | int *offset, | |
286 | int *valuelen, | |
836a94ad | 287 | __uint8_t **src) |
7bc0dc27 DC |
288 | { |
289 | char *dst = bp->b_addr; | |
290 | xfs_daddr_t bno = bp->b_bn; | |
291 | int len = BBTOB(bp->b_length); | |
c2c4c477 | 292 | int blksize = mp->m_attr_geo->blksize; |
7bc0dc27 | 293 | |
c2c4c477 | 294 | ASSERT(len >= blksize); |
7bc0dc27 DC |
295 | |
296 | while (len > 0 && *valuelen > 0) { | |
297 | int hdr_size; | |
c2c4c477 | 298 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, blksize); |
7bc0dc27 DC |
299 | |
300 | byte_cnt = min(*valuelen, byte_cnt); | |
301 | hdr_size = xfs_attr3_rmt_hdr_set(mp, dst, ino, *offset, | |
302 | byte_cnt, bno); | |
303 | ||
304 | memcpy(dst + hdr_size, *src, byte_cnt); | |
305 | ||
306 | /* | |
307 | * If this is the last block, zero the remainder of it. | |
308 | * Check that we are actually the last block, too. | |
309 | */ | |
c2c4c477 | 310 | if (byte_cnt + hdr_size < blksize) { |
7bc0dc27 | 311 | ASSERT(*valuelen - byte_cnt == 0); |
c2c4c477 | 312 | ASSERT(len == blksize); |
7bc0dc27 | 313 | memset(dst + hdr_size + byte_cnt, 0, |
c2c4c477 | 314 | blksize - hdr_size - byte_cnt); |
7bc0dc27 DC |
315 | } |
316 | ||
317 | /* roll buffer forwards */ | |
c2c4c477 DC |
318 | len -= blksize; |
319 | dst += blksize; | |
320 | bno += BTOBB(blksize); | |
7bc0dc27 DC |
321 | |
322 | /* roll attribute data forwards */ | |
323 | *valuelen -= byte_cnt; | |
324 | *src += byte_cnt; | |
325 | *offset += byte_cnt; | |
326 | } | |
d2e448d5 DC |
327 | } |
328 | ||
95920cd6 DC |
329 | /* |
330 | * Read the value associated with an attribute from the out-of-line buffer | |
331 | * that we stored it in. | |
332 | */ | |
333 | int | |
d2e448d5 DC |
334 | xfs_attr_rmtval_get( |
335 | struct xfs_da_args *args) | |
95920cd6 | 336 | { |
d2e448d5 DC |
337 | struct xfs_bmbt_irec map[ATTR_RMTVALUE_MAPSIZE]; |
338 | struct xfs_mount *mp = args->dp->i_mount; | |
339 | struct xfs_buf *bp; | |
d2e448d5 | 340 | xfs_dablk_t lblkno = args->rmtblkno; |
836a94ad | 341 | __uint8_t *dst = args->value; |
8275cdd0 | 342 | int valuelen; |
d2e448d5 DC |
343 | int nmap; |
344 | int error; | |
7bc0dc27 | 345 | int blkcnt = args->rmtblkcnt; |
d2e448d5 DC |
346 | int i; |
347 | int offset = 0; | |
95920cd6 DC |
348 | |
349 | trace_xfs_attr_rmtval_get(args); | |
350 | ||
351 | ASSERT(!(args->flags & ATTR_KERNOVAL)); | |
8275cdd0 | 352 | ASSERT(args->rmtvaluelen == args->valuelen); |
95920cd6 | 353 | |
8275cdd0 | 354 | valuelen = args->rmtvaluelen; |
95920cd6 DC |
355 | while (valuelen > 0) { |
356 | nmap = ATTR_RMTVALUE_MAPSIZE; | |
357 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
551b382f | 358 | blkcnt, map, &nmap, |
95920cd6 DC |
359 | XFS_BMAPI_ATTRFORK); |
360 | if (error) | |
d2e448d5 | 361 | return error; |
95920cd6 DC |
362 | ASSERT(nmap >= 1); |
363 | ||
364 | for (i = 0; (i < nmap) && (valuelen > 0); i++) { | |
7bc0dc27 DC |
365 | xfs_daddr_t dblkno; |
366 | int dblkcnt; | |
d2e448d5 | 367 | |
95920cd6 DC |
368 | ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && |
369 | (map[i].br_startblock != HOLESTARTBLOCK)); | |
370 | dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); | |
7bc0dc27 | 371 | dblkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
95920cd6 | 372 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, |
7bc0dc27 | 373 | dblkno, dblkcnt, 0, &bp, |
d2e448d5 | 374 | &xfs_attr3_rmt_buf_ops); |
95920cd6 | 375 | if (error) |
d2e448d5 DC |
376 | return error; |
377 | ||
7bc0dc27 DC |
378 | error = xfs_attr_rmtval_copyout(mp, bp, args->dp->i_ino, |
379 | &offset, &valuelen, | |
380 | &dst); | |
95920cd6 | 381 | xfs_buf_relse(bp); |
7bc0dc27 DC |
382 | if (error) |
383 | return error; | |
d2e448d5 | 384 | |
7bc0dc27 | 385 | /* roll attribute extent map forwards */ |
95920cd6 | 386 | lblkno += map[i].br_blockcount; |
7bc0dc27 | 387 | blkcnt -= map[i].br_blockcount; |
95920cd6 DC |
388 | } |
389 | } | |
390 | ASSERT(valuelen == 0); | |
d2e448d5 | 391 | return 0; |
95920cd6 DC |
392 | } |
393 | ||
394 | /* | |
395 | * Write the value associated with an attribute into the out-of-line buffer | |
396 | * that we have defined for it. | |
397 | */ | |
398 | int | |
d2e448d5 DC |
399 | xfs_attr_rmtval_set( |
400 | struct xfs_da_args *args) | |
95920cd6 | 401 | { |
d2e448d5 DC |
402 | struct xfs_inode *dp = args->dp; |
403 | struct xfs_mount *mp = dp->i_mount; | |
404 | struct xfs_bmbt_irec map; | |
d2e448d5 DC |
405 | xfs_dablk_t lblkno; |
406 | xfs_fileoff_t lfileoff = 0; | |
836a94ad | 407 | __uint8_t *src = args->value; |
d2e448d5 DC |
408 | int blkcnt; |
409 | int valuelen; | |
410 | int nmap; | |
411 | int error; | |
d2e448d5 | 412 | int offset = 0; |
95920cd6 DC |
413 | |
414 | trace_xfs_attr_rmtval_set(args); | |
415 | ||
95920cd6 DC |
416 | /* |
417 | * Find a "hole" in the attribute address space large enough for | |
d2e448d5 DC |
418 | * us to drop the new attribute's value into. Because CRC enable |
419 | * attributes have headers, we can't just do a straight byte to FSB | |
7bc0dc27 | 420 | * conversion and have to take the header space into account. |
95920cd6 | 421 | */ |
8275cdd0 | 422 | blkcnt = xfs_attr3_rmt_blocks(mp, args->rmtvaluelen); |
95920cd6 DC |
423 | error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, |
424 | XFS_ATTR_FORK); | |
d2e448d5 DC |
425 | if (error) |
426 | return error; | |
427 | ||
95920cd6 DC |
428 | args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff; |
429 | args->rmtblkcnt = blkcnt; | |
430 | ||
431 | /* | |
432 | * Roll through the "value", allocating blocks on disk as required. | |
433 | */ | |
434 | while (blkcnt > 0) { | |
d2e448d5 DC |
435 | int committed; |
436 | ||
95920cd6 DC |
437 | /* |
438 | * Allocate a single extent, up to the size of the value. | |
439 | */ | |
440 | xfs_bmap_init(args->flist, args->firstblock); | |
441 | nmap = 1; | |
442 | error = xfs_bmapi_write(args->trans, dp, (xfs_fileoff_t)lblkno, | |
443 | blkcnt, | |
444 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, | |
445 | args->firstblock, args->total, &map, &nmap, | |
446 | args->flist); | |
447 | if (!error) { | |
448 | error = xfs_bmap_finish(&args->trans, args->flist, | |
449 | &committed); | |
450 | } | |
451 | if (error) { | |
452 | ASSERT(committed); | |
453 | args->trans = NULL; | |
454 | xfs_bmap_cancel(args->flist); | |
d99831ff | 455 | return error; |
95920cd6 DC |
456 | } |
457 | ||
458 | /* | |
459 | * bmap_finish() may have committed the last trans and started | |
460 | * a new one. We need the inode to be in all transactions. | |
461 | */ | |
462 | if (committed) | |
463 | xfs_trans_ijoin(args->trans, dp, 0); | |
464 | ||
465 | ASSERT(nmap == 1); | |
466 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
467 | (map.br_startblock != HOLESTARTBLOCK)); | |
468 | lblkno += map.br_blockcount; | |
469 | blkcnt -= map.br_blockcount; | |
470 | ||
471 | /* | |
472 | * Start the next trans in the chain. | |
473 | */ | |
474 | error = xfs_trans_roll(&args->trans, dp); | |
475 | if (error) | |
d99831ff | 476 | return error; |
95920cd6 DC |
477 | } |
478 | ||
479 | /* | |
480 | * Roll through the "value", copying the attribute value to the | |
481 | * already-allocated blocks. Blocks are written synchronously | |
482 | * so that we can know they are all on disk before we turn off | |
483 | * the INCOMPLETE flag. | |
484 | */ | |
485 | lblkno = args->rmtblkno; | |
26f71445 | 486 | blkcnt = args->rmtblkcnt; |
8275cdd0 | 487 | valuelen = args->rmtvaluelen; |
95920cd6 | 488 | while (valuelen > 0) { |
7bc0dc27 DC |
489 | struct xfs_buf *bp; |
490 | xfs_daddr_t dblkno; | |
491 | int dblkcnt; | |
492 | ||
493 | ASSERT(blkcnt > 0); | |
95920cd6 | 494 | |
95920cd6 DC |
495 | xfs_bmap_init(args->flist, args->firstblock); |
496 | nmap = 1; | |
497 | error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno, | |
26f71445 | 498 | blkcnt, &map, &nmap, |
95920cd6 DC |
499 | XFS_BMAPI_ATTRFORK); |
500 | if (error) | |
d99831ff | 501 | return error; |
95920cd6 DC |
502 | ASSERT(nmap == 1); |
503 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
504 | (map.br_startblock != HOLESTARTBLOCK)); | |
505 | ||
506 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
26f71445 | 507 | dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
95920cd6 | 508 | |
26f71445 | 509 | bp = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt, 0); |
95920cd6 | 510 | if (!bp) |
2451337d | 511 | return -ENOMEM; |
d2e448d5 | 512 | bp->b_ops = &xfs_attr3_rmt_buf_ops; |
26f71445 | 513 | |
7bc0dc27 DC |
514 | xfs_attr_rmtval_copyin(mp, bp, args->dp->i_ino, &offset, |
515 | &valuelen, &src); | |
95920cd6 DC |
516 | |
517 | error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */ | |
518 | xfs_buf_relse(bp); | |
519 | if (error) | |
520 | return error; | |
d2e448d5 | 521 | |
95920cd6 | 522 | |
7bc0dc27 | 523 | /* roll attribute extent map forwards */ |
95920cd6 | 524 | lblkno += map.br_blockcount; |
26f71445 | 525 | blkcnt -= map.br_blockcount; |
95920cd6 DC |
526 | } |
527 | ASSERT(valuelen == 0); | |
d2e448d5 | 528 | return 0; |
95920cd6 DC |
529 | } |
530 | ||
531 | /* | |
532 | * Remove the value associated with an attribute by deleting the | |
533 | * out-of-line buffer that it is stored on. | |
534 | */ | |
535 | int | |
7bc0dc27 DC |
536 | xfs_attr_rmtval_remove( |
537 | struct xfs_da_args *args) | |
95920cd6 | 538 | { |
7bc0dc27 DC |
539 | struct xfs_mount *mp = args->dp->i_mount; |
540 | xfs_dablk_t lblkno; | |
541 | int blkcnt; | |
542 | int error; | |
543 | int done; | |
95920cd6 DC |
544 | |
545 | trace_xfs_attr_rmtval_remove(args); | |
546 | ||
95920cd6 | 547 | /* |
58a72281 | 548 | * Roll through the "value", invalidating the attribute value's blocks. |
95920cd6 DC |
549 | */ |
550 | lblkno = args->rmtblkno; | |
7bc0dc27 DC |
551 | blkcnt = args->rmtblkcnt; |
552 | while (blkcnt > 0) { | |
553 | struct xfs_bmbt_irec map; | |
554 | struct xfs_buf *bp; | |
555 | xfs_daddr_t dblkno; | |
556 | int dblkcnt; | |
557 | int nmap; | |
58a72281 | 558 | |
95920cd6 DC |
559 | /* |
560 | * Try to remember where we decided to put the value. | |
561 | */ | |
562 | nmap = 1; | |
563 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
58a72281 | 564 | blkcnt, &map, &nmap, XFS_BMAPI_ATTRFORK); |
95920cd6 | 565 | if (error) |
d99831ff | 566 | return error; |
95920cd6 DC |
567 | ASSERT(nmap == 1); |
568 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
569 | (map.br_startblock != HOLESTARTBLOCK)); | |
570 | ||
571 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
58a72281 | 572 | dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
95920cd6 DC |
573 | |
574 | /* | |
575 | * If the "remote" value is in the cache, remove it. | |
576 | */ | |
58a72281 | 577 | bp = xfs_incore(mp->m_ddev_targp, dblkno, dblkcnt, XBF_TRYLOCK); |
95920cd6 DC |
578 | if (bp) { |
579 | xfs_buf_stale(bp); | |
580 | xfs_buf_relse(bp); | |
581 | bp = NULL; | |
582 | } | |
583 | ||
95920cd6 | 584 | lblkno += map.br_blockcount; |
58a72281 | 585 | blkcnt -= map.br_blockcount; |
95920cd6 DC |
586 | } |
587 | ||
588 | /* | |
589 | * Keep de-allocating extents until the remote-value region is gone. | |
590 | */ | |
591 | lblkno = args->rmtblkno; | |
7bc0dc27 | 592 | blkcnt = args->rmtblkcnt; |
95920cd6 DC |
593 | done = 0; |
594 | while (!done) { | |
7bc0dc27 DC |
595 | int committed; |
596 | ||
95920cd6 DC |
597 | xfs_bmap_init(args->flist, args->firstblock); |
598 | error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt, | |
599 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, | |
600 | 1, args->firstblock, args->flist, | |
601 | &done); | |
602 | if (!error) { | |
603 | error = xfs_bmap_finish(&args->trans, args->flist, | |
604 | &committed); | |
605 | } | |
606 | if (error) { | |
607 | ASSERT(committed); | |
608 | args->trans = NULL; | |
609 | xfs_bmap_cancel(args->flist); | |
d2e448d5 | 610 | return error; |
95920cd6 DC |
611 | } |
612 | ||
613 | /* | |
614 | * bmap_finish() may have committed the last trans and started | |
615 | * a new one. We need the inode to be in all transactions. | |
616 | */ | |
617 | if (committed) | |
618 | xfs_trans_ijoin(args->trans, args->dp, 0); | |
619 | ||
620 | /* | |
621 | * Close out trans and start the next one in the chain. | |
622 | */ | |
623 | error = xfs_trans_roll(&args->trans, args->dp); | |
624 | if (error) | |
d99831ff | 625 | return error; |
95920cd6 | 626 | } |
d99831ff | 627 | return 0; |
95920cd6 | 628 | } |