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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
95920cd6 DC |
2 | /* |
3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. | |
d2e448d5 | 4 | * Copyright (c) 2013 Red Hat, Inc. |
95920cd6 | 5 | * All Rights Reserved. |
95920cd6 DC |
6 | */ |
7 | #include "xfs.h" | |
8 | #include "xfs_fs.h" | |
632b89e8 | 9 | #include "xfs_shared.h" |
a4fbe6ab | 10 | #include "xfs_format.h" |
239880ef DC |
11 | #include "xfs_log_format.h" |
12 | #include "xfs_trans_resv.h" | |
95920cd6 | 13 | #include "xfs_bit.h" |
95920cd6 | 14 | #include "xfs_mount.h" |
3ab78df2 | 15 | #include "xfs_defer.h" |
57062787 | 16 | #include "xfs_da_format.h" |
95920cd6 | 17 | #include "xfs_da_btree.h" |
95920cd6 | 18 | #include "xfs_inode.h" |
239880ef | 19 | #include "xfs_trans.h" |
95920cd6 DC |
20 | #include "xfs_bmap.h" |
21 | #include "xfs_attr.h" | |
5f213ddb | 22 | #include "xfs_attr_remote.h" |
95920cd6 | 23 | #include "xfs_trace.h" |
a4fbe6ab | 24 | #include "xfs_error.h" |
ca14c096 | 25 | #include "xfs_health.h" |
95920cd6 DC |
26 | |
27 | #define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */ | |
28 | ||
e8db2aaf DW |
29 | /* |
30 | * Remote Attribute Values | |
31 | * ======================= | |
32 | * | |
33 | * Remote extended attribute values are conceptually simple -- they're written | |
34 | * to data blocks mapped by an inode's attribute fork, and they have an upper | |
35 | * size limit of 64k. Setting a value does not involve the XFS log. | |
36 | * | |
37 | * However, on a v5 filesystem, maximally sized remote attr values require one | |
38 | * block more than 64k worth of space to hold both the remote attribute value | |
39 | * header (64 bytes). On a 4k block filesystem this results in a 68k buffer; | |
40 | * on a 64k block filesystem, this would be a 128k buffer. Note that the log | |
41 | * format can only handle a dirty buffer of XFS_MAX_BLOCKSIZE length (64k). | |
42 | * Therefore, we /must/ ensure that remote attribute value buffers never touch | |
43 | * the logging system and therefore never have a log item. | |
44 | */ | |
45 | ||
d2e448d5 DC |
46 | /* |
47 | * Each contiguous block has a header, so it is not just a simple attribute | |
48 | * length to FSB conversion. | |
49 | */ | |
7bc0dc27 | 50 | int |
d2e448d5 DC |
51 | xfs_attr3_rmt_blocks( |
52 | struct xfs_mount *mp, | |
53 | int attrlen) | |
54 | { | |
38c26bfd | 55 | if (xfs_has_crc(mp)) { |
551b382f DC |
56 | int buflen = XFS_ATTR3_RMT_BUF_SPACE(mp, mp->m_sb.sb_blocksize); |
57 | return (attrlen + buflen - 1) / buflen; | |
58 | } | |
59 | return XFS_B_TO_FSB(mp, attrlen); | |
d2e448d5 DC |
60 | } |
61 | ||
7bc0dc27 DC |
62 | /* |
63 | * Checking of the remote attribute header is split into two parts. The verifier | |
64 | * does CRC, location and bounds checking, the unpacking function checks the | |
65 | * attribute parameters and owner. | |
66 | */ | |
a6a781a5 | 67 | static xfs_failaddr_t |
7bc0dc27 | 68 | xfs_attr3_rmt_hdr_ok( |
7bc0dc27 DC |
69 | void *ptr, |
70 | xfs_ino_t ino, | |
71 | uint32_t offset, | |
72 | uint32_t size, | |
73 | xfs_daddr_t bno) | |
74 | { | |
75 | struct xfs_attr3_rmt_hdr *rmt = ptr; | |
76 | ||
77 | if (bno != be64_to_cpu(rmt->rm_blkno)) | |
a6a781a5 | 78 | return __this_address; |
7bc0dc27 | 79 | if (offset != be32_to_cpu(rmt->rm_offset)) |
a6a781a5 | 80 | return __this_address; |
7bc0dc27 | 81 | if (size != be32_to_cpu(rmt->rm_bytes)) |
a6a781a5 | 82 | return __this_address; |
7bc0dc27 | 83 | if (ino != be64_to_cpu(rmt->rm_owner)) |
a6a781a5 | 84 | return __this_address; |
7bc0dc27 DC |
85 | |
86 | /* ok */ | |
a6a781a5 | 87 | return NULL; |
7bc0dc27 DC |
88 | } |
89 | ||
a6a781a5 | 90 | static xfs_failaddr_t |
d2e448d5 | 91 | xfs_attr3_rmt_verify( |
7bc0dc27 | 92 | struct xfs_mount *mp, |
39708c20 | 93 | struct xfs_buf *bp, |
7bc0dc27 DC |
94 | void *ptr, |
95 | int fsbsize, | |
96 | xfs_daddr_t bno) | |
d2e448d5 | 97 | { |
7bc0dc27 | 98 | struct xfs_attr3_rmt_hdr *rmt = ptr; |
d2e448d5 | 99 | |
39708c20 | 100 | if (!xfs_verify_magic(bp, rmt->rm_magic)) |
a6a781a5 | 101 | return __this_address; |
ce748eaa | 102 | if (!uuid_equal(&rmt->rm_uuid, &mp->m_sb.sb_meta_uuid)) |
a6a781a5 | 103 | return __this_address; |
7bc0dc27 | 104 | if (be64_to_cpu(rmt->rm_blkno) != bno) |
a6a781a5 | 105 | return __this_address; |
7bc0dc27 | 106 | if (be32_to_cpu(rmt->rm_bytes) > fsbsize - sizeof(*rmt)) |
a6a781a5 | 107 | return __this_address; |
d2e448d5 | 108 | if (be32_to_cpu(rmt->rm_offset) + |
51fcbfe7 | 109 | be32_to_cpu(rmt->rm_bytes) > XFS_XATTR_SIZE_MAX) |
a6a781a5 | 110 | return __this_address; |
d2e448d5 | 111 | if (rmt->rm_owner == 0) |
a6a781a5 | 112 | return __this_address; |
d2e448d5 | 113 | |
a6a781a5 | 114 | return NULL; |
d2e448d5 DC |
115 | } |
116 | ||
b5572597 DW |
117 | static int |
118 | __xfs_attr3_rmt_read_verify( | |
119 | struct xfs_buf *bp, | |
120 | bool check_crc, | |
121 | xfs_failaddr_t *failaddr) | |
d2e448d5 | 122 | { |
dbd329f1 | 123 | struct xfs_mount *mp = bp->b_mount; |
7bc0dc27 DC |
124 | char *ptr; |
125 | int len; | |
7bc0dc27 | 126 | xfs_daddr_t bno; |
c2c4c477 | 127 | int blksize = mp->m_attr_geo->blksize; |
d2e448d5 DC |
128 | |
129 | /* no verification of non-crc buffers */ | |
38c26bfd | 130 | if (!xfs_has_crc(mp)) |
b5572597 | 131 | return 0; |
d2e448d5 | 132 | |
7bc0dc27 | 133 | ptr = bp->b_addr; |
9343ee76 | 134 | bno = xfs_buf_daddr(bp); |
7bc0dc27 | 135 | len = BBTOB(bp->b_length); |
c2c4c477 | 136 | ASSERT(len >= blksize); |
7bc0dc27 DC |
137 | |
138 | while (len > 0) { | |
b5572597 DW |
139 | if (check_crc && |
140 | !xfs_verify_cksum(ptr, blksize, XFS_ATTR3_RMT_CRC_OFF)) { | |
141 | *failaddr = __this_address; | |
142 | return -EFSBADCRC; | |
7bc0dc27 | 143 | } |
39708c20 | 144 | *failaddr = xfs_attr3_rmt_verify(mp, bp, ptr, blksize, bno); |
b5572597 DW |
145 | if (*failaddr) |
146 | return -EFSCORRUPTED; | |
c2c4c477 DC |
147 | len -= blksize; |
148 | ptr += blksize; | |
149 | bno += BTOBB(blksize); | |
7bc0dc27 DC |
150 | } |
151 | ||
b5572597 DW |
152 | if (len != 0) { |
153 | *failaddr = __this_address; | |
154 | return -EFSCORRUPTED; | |
155 | } | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | static void | |
161 | xfs_attr3_rmt_read_verify( | |
162 | struct xfs_buf *bp) | |
163 | { | |
164 | xfs_failaddr_t fa; | |
165 | int error; | |
166 | ||
167 | error = __xfs_attr3_rmt_read_verify(bp, true, &fa); | |
168 | if (error) | |
169 | xfs_verifier_error(bp, error, fa); | |
170 | } | |
171 | ||
172 | static xfs_failaddr_t | |
173 | xfs_attr3_rmt_verify_struct( | |
174 | struct xfs_buf *bp) | |
175 | { | |
176 | xfs_failaddr_t fa; | |
177 | int error; | |
178 | ||
179 | error = __xfs_attr3_rmt_read_verify(bp, false, &fa); | |
180 | return error ? fa : NULL; | |
d2e448d5 DC |
181 | } |
182 | ||
183 | static void | |
184 | xfs_attr3_rmt_write_verify( | |
185 | struct xfs_buf *bp) | |
186 | { | |
dbd329f1 | 187 | struct xfs_mount *mp = bp->b_mount; |
bc1a09b8 | 188 | xfs_failaddr_t fa; |
e3c32ee9 | 189 | int blksize = mp->m_attr_geo->blksize; |
7bc0dc27 DC |
190 | char *ptr; |
191 | int len; | |
192 | xfs_daddr_t bno; | |
d2e448d5 DC |
193 | |
194 | /* no verification of non-crc buffers */ | |
38c26bfd | 195 | if (!xfs_has_crc(mp)) |
d2e448d5 DC |
196 | return; |
197 | ||
7bc0dc27 | 198 | ptr = bp->b_addr; |
9343ee76 | 199 | bno = xfs_buf_daddr(bp); |
7bc0dc27 | 200 | len = BBTOB(bp->b_length); |
c2c4c477 | 201 | ASSERT(len >= blksize); |
7bc0dc27 DC |
202 | |
203 | while (len > 0) { | |
e3c32ee9 DC |
204 | struct xfs_attr3_rmt_hdr *rmt = (struct xfs_attr3_rmt_hdr *)ptr; |
205 | ||
39708c20 | 206 | fa = xfs_attr3_rmt_verify(mp, bp, ptr, blksize, bno); |
bc1a09b8 DW |
207 | if (fa) { |
208 | xfs_verifier_error(bp, -EFSCORRUPTED, fa); | |
7bc0dc27 DC |
209 | return; |
210 | } | |
d2e448d5 | 211 | |
e3c32ee9 DC |
212 | /* |
213 | * Ensure we aren't writing bogus LSNs to disk. See | |
214 | * xfs_attr3_rmt_hdr_set() for the explanation. | |
215 | */ | |
216 | if (rmt->rm_lsn != cpu_to_be64(NULLCOMMITLSN)) { | |
bc1a09b8 | 217 | xfs_verifier_error(bp, -EFSCORRUPTED, __this_address); |
e3c32ee9 | 218 | return; |
7bc0dc27 | 219 | } |
c2c4c477 | 220 | xfs_update_cksum(ptr, blksize, XFS_ATTR3_RMT_CRC_OFF); |
7bc0dc27 | 221 | |
c2c4c477 DC |
222 | len -= blksize; |
223 | ptr += blksize; | |
224 | bno += BTOBB(blksize); | |
d2e448d5 | 225 | } |
31ca03c9 DW |
226 | |
227 | if (len != 0) | |
bc1a09b8 | 228 | xfs_verifier_error(bp, -EFSCORRUPTED, __this_address); |
d2e448d5 DC |
229 | } |
230 | ||
231 | const struct xfs_buf_ops xfs_attr3_rmt_buf_ops = { | |
233135b7 | 232 | .name = "xfs_attr3_rmt", |
39708c20 | 233 | .magic = { 0, cpu_to_be32(XFS_ATTR3_RMT_MAGIC) }, |
d2e448d5 DC |
234 | .verify_read = xfs_attr3_rmt_read_verify, |
235 | .verify_write = xfs_attr3_rmt_write_verify, | |
b5572597 | 236 | .verify_struct = xfs_attr3_rmt_verify_struct, |
d2e448d5 DC |
237 | }; |
238 | ||
7bc0dc27 | 239 | STATIC int |
d2e448d5 DC |
240 | xfs_attr3_rmt_hdr_set( |
241 | struct xfs_mount *mp, | |
7bc0dc27 | 242 | void *ptr, |
d2e448d5 DC |
243 | xfs_ino_t ino, |
244 | uint32_t offset, | |
245 | uint32_t size, | |
7bc0dc27 | 246 | xfs_daddr_t bno) |
d2e448d5 | 247 | { |
7bc0dc27 | 248 | struct xfs_attr3_rmt_hdr *rmt = ptr; |
d2e448d5 | 249 | |
38c26bfd | 250 | if (!xfs_has_crc(mp)) |
d2e448d5 DC |
251 | return 0; |
252 | ||
253 | rmt->rm_magic = cpu_to_be32(XFS_ATTR3_RMT_MAGIC); | |
254 | rmt->rm_offset = cpu_to_be32(offset); | |
255 | rmt->rm_bytes = cpu_to_be32(size); | |
ce748eaa | 256 | uuid_copy(&rmt->rm_uuid, &mp->m_sb.sb_meta_uuid); |
d2e448d5 | 257 | rmt->rm_owner = cpu_to_be64(ino); |
7bc0dc27 | 258 | rmt->rm_blkno = cpu_to_be64(bno); |
d2e448d5 | 259 | |
e3c32ee9 DC |
260 | /* |
261 | * Remote attribute blocks are written synchronously, so we don't | |
262 | * have an LSN that we can stamp in them that makes any sense to log | |
263 | * recovery. To ensure that log recovery handles overwrites of these | |
264 | * blocks sanely (i.e. once they've been freed and reallocated as some | |
265 | * other type of metadata) we need to ensure that the LSN has a value | |
266 | * that tells log recovery to ignore the LSN and overwrite the buffer | |
267 | * with whatever is in it's log. To do this, we use the magic | |
268 | * NULLCOMMITLSN to indicate that the LSN is invalid. | |
269 | */ | |
270 | rmt->rm_lsn = cpu_to_be64(NULLCOMMITLSN); | |
271 | ||
d2e448d5 DC |
272 | return sizeof(struct xfs_attr3_rmt_hdr); |
273 | } | |
274 | ||
275 | /* | |
7bc0dc27 | 276 | * Helper functions to copy attribute data in and out of the one disk extents |
d2e448d5 | 277 | */ |
7bc0dc27 DC |
278 | STATIC int |
279 | xfs_attr_rmtval_copyout( | |
ca14c096 DW |
280 | struct xfs_mount *mp, |
281 | struct xfs_buf *bp, | |
282 | struct xfs_inode *dp, | |
283 | int *offset, | |
284 | int *valuelen, | |
285 | uint8_t **dst) | |
d2e448d5 | 286 | { |
ca14c096 DW |
287 | char *src = bp->b_addr; |
288 | xfs_ino_t ino = dp->i_ino; | |
289 | xfs_daddr_t bno = xfs_buf_daddr(bp); | |
290 | int len = BBTOB(bp->b_length); | |
291 | int blksize = mp->m_attr_geo->blksize; | |
d2e448d5 | 292 | |
c2c4c477 | 293 | ASSERT(len >= blksize); |
d2e448d5 | 294 | |
7bc0dc27 DC |
295 | while (len > 0 && *valuelen > 0) { |
296 | int hdr_size = 0; | |
c2c4c477 | 297 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, blksize); |
7bc0dc27 | 298 | |
c5c249b4 | 299 | byte_cnt = min(*valuelen, byte_cnt); |
7bc0dc27 | 300 | |
38c26bfd | 301 | if (xfs_has_crc(mp)) { |
a6a781a5 | 302 | if (xfs_attr3_rmt_hdr_ok(src, ino, *offset, |
7bc0dc27 DC |
303 | byte_cnt, bno)) { |
304 | xfs_alert(mp, | |
305 | "remote attribute header mismatch bno/off/len/owner (0x%llx/0x%x/Ox%x/0x%llx)", | |
306 | bno, *offset, byte_cnt, ino); | |
ca14c096 | 307 | xfs_dirattr_mark_sick(dp, XFS_ATTR_FORK); |
2451337d | 308 | return -EFSCORRUPTED; |
7bc0dc27 DC |
309 | } |
310 | hdr_size = sizeof(struct xfs_attr3_rmt_hdr); | |
311 | } | |
312 | ||
313 | memcpy(*dst, src + hdr_size, byte_cnt); | |
314 | ||
315 | /* roll buffer forwards */ | |
c2c4c477 DC |
316 | len -= blksize; |
317 | src += blksize; | |
318 | bno += BTOBB(blksize); | |
7bc0dc27 DC |
319 | |
320 | /* roll attribute data forwards */ | |
321 | *valuelen -= byte_cnt; | |
322 | *dst += byte_cnt; | |
323 | *offset += byte_cnt; | |
324 | } | |
325 | return 0; | |
326 | } | |
327 | ||
328 | STATIC void | |
329 | xfs_attr_rmtval_copyin( | |
330 | struct xfs_mount *mp, | |
331 | struct xfs_buf *bp, | |
332 | xfs_ino_t ino, | |
333 | int *offset, | |
334 | int *valuelen, | |
c8ce540d | 335 | uint8_t **src) |
7bc0dc27 DC |
336 | { |
337 | char *dst = bp->b_addr; | |
9343ee76 | 338 | xfs_daddr_t bno = xfs_buf_daddr(bp); |
7bc0dc27 | 339 | int len = BBTOB(bp->b_length); |
c2c4c477 | 340 | int blksize = mp->m_attr_geo->blksize; |
7bc0dc27 | 341 | |
c2c4c477 | 342 | ASSERT(len >= blksize); |
7bc0dc27 DC |
343 | |
344 | while (len > 0 && *valuelen > 0) { | |
345 | int hdr_size; | |
c2c4c477 | 346 | int byte_cnt = XFS_ATTR3_RMT_BUF_SPACE(mp, blksize); |
7bc0dc27 DC |
347 | |
348 | byte_cnt = min(*valuelen, byte_cnt); | |
349 | hdr_size = xfs_attr3_rmt_hdr_set(mp, dst, ino, *offset, | |
350 | byte_cnt, bno); | |
351 | ||
352 | memcpy(dst + hdr_size, *src, byte_cnt); | |
353 | ||
354 | /* | |
355 | * If this is the last block, zero the remainder of it. | |
356 | * Check that we are actually the last block, too. | |
357 | */ | |
c2c4c477 | 358 | if (byte_cnt + hdr_size < blksize) { |
7bc0dc27 | 359 | ASSERT(*valuelen - byte_cnt == 0); |
c2c4c477 | 360 | ASSERT(len == blksize); |
7bc0dc27 | 361 | memset(dst + hdr_size + byte_cnt, 0, |
c2c4c477 | 362 | blksize - hdr_size - byte_cnt); |
7bc0dc27 DC |
363 | } |
364 | ||
365 | /* roll buffer forwards */ | |
c2c4c477 DC |
366 | len -= blksize; |
367 | dst += blksize; | |
368 | bno += BTOBB(blksize); | |
7bc0dc27 DC |
369 | |
370 | /* roll attribute data forwards */ | |
371 | *valuelen -= byte_cnt; | |
372 | *src += byte_cnt; | |
373 | *offset += byte_cnt; | |
374 | } | |
d2e448d5 DC |
375 | } |
376 | ||
95920cd6 DC |
377 | /* |
378 | * Read the value associated with an attribute from the out-of-line buffer | |
379 | * that we stored it in. | |
728bcaa3 DC |
380 | * |
381 | * Returns 0 on successful retrieval, otherwise an error. | |
95920cd6 DC |
382 | */ |
383 | int | |
d2e448d5 DC |
384 | xfs_attr_rmtval_get( |
385 | struct xfs_da_args *args) | |
95920cd6 | 386 | { |
d2e448d5 DC |
387 | struct xfs_bmbt_irec map[ATTR_RMTVALUE_MAPSIZE]; |
388 | struct xfs_mount *mp = args->dp->i_mount; | |
389 | struct xfs_buf *bp; | |
d2e448d5 | 390 | xfs_dablk_t lblkno = args->rmtblkno; |
c8ce540d | 391 | uint8_t *dst = args->value; |
8275cdd0 | 392 | int valuelen; |
d2e448d5 DC |
393 | int nmap; |
394 | int error; | |
7bc0dc27 | 395 | int blkcnt = args->rmtblkcnt; |
d2e448d5 DC |
396 | int i; |
397 | int offset = 0; | |
95920cd6 DC |
398 | |
399 | trace_xfs_attr_rmtval_get(args); | |
400 | ||
e513e25c | 401 | ASSERT(args->valuelen != 0); |
8275cdd0 | 402 | ASSERT(args->rmtvaluelen == args->valuelen); |
95920cd6 | 403 | |
8275cdd0 | 404 | valuelen = args->rmtvaluelen; |
95920cd6 DC |
405 | while (valuelen > 0) { |
406 | nmap = ATTR_RMTVALUE_MAPSIZE; | |
407 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
551b382f | 408 | blkcnt, map, &nmap, |
95920cd6 DC |
409 | XFS_BMAPI_ATTRFORK); |
410 | if (error) | |
d2e448d5 | 411 | return error; |
95920cd6 DC |
412 | ASSERT(nmap >= 1); |
413 | ||
414 | for (i = 0; (i < nmap) && (valuelen > 0); i++) { | |
7bc0dc27 DC |
415 | xfs_daddr_t dblkno; |
416 | int dblkcnt; | |
d2e448d5 | 417 | |
95920cd6 DC |
418 | ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && |
419 | (map[i].br_startblock != HOLESTARTBLOCK)); | |
420 | dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); | |
7bc0dc27 | 421 | dblkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
0e3eccce DW |
422 | error = xfs_buf_read(mp->m_ddev_targp, dblkno, dblkcnt, |
423 | 0, &bp, &xfs_attr3_rmt_buf_ops); | |
ca14c096 DW |
424 | if (xfs_metadata_is_sick(error)) |
425 | xfs_dirattr_mark_sick(args->dp, XFS_ATTR_FORK); | |
0e3eccce DW |
426 | if (error) |
427 | return error; | |
d2e448d5 | 428 | |
ca14c096 | 429 | error = xfs_attr_rmtval_copyout(mp, bp, args->dp, |
7bc0dc27 DC |
430 | &offset, &valuelen, |
431 | &dst); | |
e8db2aaf | 432 | xfs_buf_relse(bp); |
7bc0dc27 DC |
433 | if (error) |
434 | return error; | |
d2e448d5 | 435 | |
7bc0dc27 | 436 | /* roll attribute extent map forwards */ |
95920cd6 | 437 | lblkno += map[i].br_blockcount; |
7bc0dc27 | 438 | blkcnt -= map[i].br_blockcount; |
95920cd6 DC |
439 | } |
440 | } | |
441 | ASSERT(valuelen == 0); | |
d2e448d5 | 442 | return 0; |
95920cd6 DC |
443 | } |
444 | ||
445 | /* | |
1a485fc1 | 446 | * Find a "hole" in the attribute address space large enough for us to drop the |
8f502a40 | 447 | * new attributes value into |
95920cd6 | 448 | */ |
8f502a40 | 449 | int |
1a485fc1 | 450 | xfs_attr_rmt_find_hole( |
d2e448d5 | 451 | struct xfs_da_args *args) |
95920cd6 | 452 | { |
d2e448d5 DC |
453 | struct xfs_inode *dp = args->dp; |
454 | struct xfs_mount *mp = dp->i_mount; | |
d2e448d5 | 455 | int error; |
1a485fc1 AC |
456 | int blkcnt; |
457 | xfs_fileoff_t lfileoff = 0; | |
95920cd6 | 458 | |
95920cd6 | 459 | /* |
1a485fc1 AC |
460 | * Because CRC enable attributes have headers, we can't just do a |
461 | * straight byte to FSB conversion and have to take the header space | |
462 | * into account. | |
95920cd6 | 463 | */ |
8275cdd0 | 464 | blkcnt = xfs_attr3_rmt_blocks(mp, args->rmtvaluelen); |
95920cd6 DC |
465 | error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, |
466 | XFS_ATTR_FORK); | |
d2e448d5 DC |
467 | if (error) |
468 | return error; | |
469 | ||
1a485fc1 | 470 | args->rmtblkno = (xfs_dablk_t)lfileoff; |
95920cd6 DC |
471 | args->rmtblkcnt = blkcnt; |
472 | ||
1a485fc1 AC |
473 | return 0; |
474 | } | |
95920cd6 | 475 | |
8f502a40 | 476 | int |
1a485fc1 AC |
477 | xfs_attr_rmtval_set_value( |
478 | struct xfs_da_args *args) | |
479 | { | |
480 | struct xfs_inode *dp = args->dp; | |
481 | struct xfs_mount *mp = dp->i_mount; | |
482 | struct xfs_bmbt_irec map; | |
483 | xfs_dablk_t lblkno; | |
484 | uint8_t *src = args->value; | |
485 | int blkcnt; | |
486 | int valuelen; | |
487 | int nmap; | |
488 | int error; | |
489 | int offset = 0; | |
95920cd6 DC |
490 | |
491 | /* | |
492 | * Roll through the "value", copying the attribute value to the | |
493 | * already-allocated blocks. Blocks are written synchronously | |
494 | * so that we can know they are all on disk before we turn off | |
495 | * the INCOMPLETE flag. | |
496 | */ | |
497 | lblkno = args->rmtblkno; | |
26f71445 | 498 | blkcnt = args->rmtblkcnt; |
8275cdd0 | 499 | valuelen = args->rmtvaluelen; |
95920cd6 | 500 | while (valuelen > 0) { |
7bc0dc27 DC |
501 | struct xfs_buf *bp; |
502 | xfs_daddr_t dblkno; | |
503 | int dblkcnt; | |
504 | ||
505 | ASSERT(blkcnt > 0); | |
95920cd6 | 506 | |
95920cd6 DC |
507 | nmap = 1; |
508 | error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno, | |
26f71445 | 509 | blkcnt, &map, &nmap, |
95920cd6 DC |
510 | XFS_BMAPI_ATTRFORK); |
511 | if (error) | |
d99831ff | 512 | return error; |
95920cd6 DC |
513 | ASSERT(nmap == 1); |
514 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
515 | (map.br_startblock != HOLESTARTBLOCK)); | |
516 | ||
517 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
26f71445 | 518 | dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
95920cd6 | 519 | |
841263e9 DW |
520 | error = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt, &bp); |
521 | if (error) | |
522 | return error; | |
d2e448d5 | 523 | bp->b_ops = &xfs_attr3_rmt_buf_ops; |
26f71445 | 524 | |
7bc0dc27 DC |
525 | xfs_attr_rmtval_copyin(mp, bp, args->dp->i_ino, &offset, |
526 | &valuelen, &src); | |
95920cd6 DC |
527 | |
528 | error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */ | |
529 | xfs_buf_relse(bp); | |
530 | if (error) | |
531 | return error; | |
d2e448d5 | 532 | |
95920cd6 | 533 | |
7bc0dc27 | 534 | /* roll attribute extent map forwards */ |
95920cd6 | 535 | lblkno += map.br_blockcount; |
26f71445 | 536 | blkcnt -= map.br_blockcount; |
95920cd6 DC |
537 | } |
538 | ASSERT(valuelen == 0); | |
d2e448d5 | 539 | return 0; |
95920cd6 DC |
540 | } |
541 | ||
8edbb26b DW |
542 | /* Mark stale any incore buffers for the remote value. */ |
543 | int | |
544 | xfs_attr_rmtval_stale( | |
545 | struct xfs_inode *ip, | |
546 | struct xfs_bmbt_irec *map, | |
547 | xfs_buf_flags_t incore_flags) | |
548 | { | |
549 | struct xfs_mount *mp = ip->i_mount; | |
550 | struct xfs_buf *bp; | |
85c73bf7 | 551 | int error; |
8edbb26b | 552 | |
3fed24ff | 553 | xfs_assert_ilocked(ip, XFS_ILOCK_EXCL); |
8edbb26b DW |
554 | |
555 | if (XFS_IS_CORRUPT(mp, map->br_startblock == DELAYSTARTBLOCK) || | |
989d5ec3 DW |
556 | XFS_IS_CORRUPT(mp, map->br_startblock == HOLESTARTBLOCK)) { |
557 | xfs_bmap_mark_sick(ip, XFS_ATTR_FORK); | |
8edbb26b | 558 | return -EFSCORRUPTED; |
989d5ec3 | 559 | } |
8edbb26b | 560 | |
85c73bf7 | 561 | error = xfs_buf_incore(mp->m_ddev_targp, |
8edbb26b | 562 | XFS_FSB_TO_DADDR(mp, map->br_startblock), |
85c73bf7 DC |
563 | XFS_FSB_TO_BB(mp, map->br_blockcount), |
564 | incore_flags, &bp); | |
565 | if (error) { | |
566 | if (error == -ENOENT) | |
567 | return 0; | |
568 | return error; | |
8edbb26b DW |
569 | } |
570 | ||
85c73bf7 DC |
571 | xfs_buf_stale(bp); |
572 | xfs_buf_relse(bp); | |
8edbb26b DW |
573 | return 0; |
574 | } | |
575 | ||
8f502a40 AH |
576 | /* |
577 | * Find a hole for the attr and store it in the delayed attr context. This | |
578 | * initializes the context to roll through allocating an attr extent for a | |
579 | * delayed attr operation | |
580 | */ | |
581 | int | |
582 | xfs_attr_rmtval_find_space( | |
e3c5de22 | 583 | struct xfs_attr_intent *attr) |
8f502a40 | 584 | { |
d68c51e9 AH |
585 | struct xfs_da_args *args = attr->xattri_da_args; |
586 | struct xfs_bmbt_irec *map = &attr->xattri_map; | |
8f502a40 AH |
587 | int error; |
588 | ||
d68c51e9 AH |
589 | attr->xattri_lblkno = 0; |
590 | attr->xattri_blkcnt = 0; | |
8f502a40 AH |
591 | args->rmtblkcnt = 0; |
592 | args->rmtblkno = 0; | |
593 | memset(map, 0, sizeof(struct xfs_bmbt_irec)); | |
594 | ||
595 | error = xfs_attr_rmt_find_hole(args); | |
596 | if (error) | |
597 | return error; | |
598 | ||
d68c51e9 AH |
599 | attr->xattri_blkcnt = args->rmtblkcnt; |
600 | attr->xattri_lblkno = args->rmtblkno; | |
8f502a40 AH |
601 | |
602 | return 0; | |
603 | } | |
604 | ||
605 | /* | |
606 | * Write one block of the value associated with an attribute into the | |
607 | * out-of-line buffer that we have defined for it. This is similar to a subset | |
608 | * of xfs_attr_rmtval_set, but records the current block to the delayed attr | |
609 | * context, and leaves transaction handling to the caller. | |
610 | */ | |
611 | int | |
612 | xfs_attr_rmtval_set_blk( | |
e3c5de22 | 613 | struct xfs_attr_intent *attr) |
8f502a40 | 614 | { |
d68c51e9 | 615 | struct xfs_da_args *args = attr->xattri_da_args; |
8f502a40 | 616 | struct xfs_inode *dp = args->dp; |
d68c51e9 | 617 | struct xfs_bmbt_irec *map = &attr->xattri_map; |
8f502a40 AH |
618 | int nmap; |
619 | int error; | |
620 | ||
621 | nmap = 1; | |
d68c51e9 AH |
622 | error = xfs_bmapi_write(args->trans, dp, |
623 | (xfs_fileoff_t)attr->xattri_lblkno, | |
624 | attr->xattri_blkcnt, XFS_BMAPI_ATTRFORK, args->total, | |
8f502a40 AH |
625 | map, &nmap); |
626 | if (error) | |
627 | return error; | |
628 | ||
629 | ASSERT(nmap == 1); | |
630 | ASSERT((map->br_startblock != DELAYSTARTBLOCK) && | |
631 | (map->br_startblock != HOLESTARTBLOCK)); | |
632 | ||
633 | /* roll attribute extent map forwards */ | |
d68c51e9 AH |
634 | attr->xattri_lblkno += map->br_blockcount; |
635 | attr->xattri_blkcnt -= map->br_blockcount; | |
8f502a40 AH |
636 | |
637 | return 0; | |
638 | } | |
639 | ||
95920cd6 DC |
640 | /* |
641 | * Remove the value associated with an attribute by deleting the | |
642 | * out-of-line buffer that it is stored on. | |
643 | */ | |
644 | int | |
79514109 | 645 | xfs_attr_rmtval_invalidate( |
7bc0dc27 | 646 | struct xfs_da_args *args) |
95920cd6 | 647 | { |
7bc0dc27 DC |
648 | xfs_dablk_t lblkno; |
649 | int blkcnt; | |
650 | int error; | |
95920cd6 | 651 | |
95920cd6 | 652 | /* |
58a72281 | 653 | * Roll through the "value", invalidating the attribute value's blocks. |
95920cd6 DC |
654 | */ |
655 | lblkno = args->rmtblkno; | |
7bc0dc27 DC |
656 | blkcnt = args->rmtblkcnt; |
657 | while (blkcnt > 0) { | |
658 | struct xfs_bmbt_irec map; | |
7bc0dc27 | 659 | int nmap; |
58a72281 | 660 | |
95920cd6 DC |
661 | /* |
662 | * Try to remember where we decided to put the value. | |
663 | */ | |
664 | nmap = 1; | |
665 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, | |
58a72281 | 666 | blkcnt, &map, &nmap, XFS_BMAPI_ATTRFORK); |
95920cd6 | 667 | if (error) |
d99831ff | 668 | return error; |
989d5ec3 DW |
669 | if (XFS_IS_CORRUPT(args->dp->i_mount, nmap != 1)) { |
670 | xfs_bmap_mark_sick(args->dp, XFS_ATTR_FORK); | |
8edbb26b | 671 | return -EFSCORRUPTED; |
989d5ec3 | 672 | } |
8edbb26b DW |
673 | error = xfs_attr_rmtval_stale(args->dp, &map, XBF_TRYLOCK); |
674 | if (error) | |
675 | return error; | |
95920cd6 | 676 | |
95920cd6 | 677 | lblkno += map.br_blockcount; |
58a72281 | 678 | blkcnt -= map.br_blockcount; |
95920cd6 | 679 | } |
79514109 AC |
680 | return 0; |
681 | } | |
95920cd6 | 682 | |
8b8e0cc0 AC |
683 | /* |
684 | * Remove the value associated with an attribute by deleting the out-of-line | |
2b74b03c AH |
685 | * buffer that it is stored on. Returns -EAGAIN for the caller to refresh the |
686 | * transaction and re-call the function. Callers should keep calling this | |
687 | * routine until it returns something other than -EAGAIN. | |
8b8e0cc0 AC |
688 | */ |
689 | int | |
5e68b4c7 | 690 | xfs_attr_rmtval_remove( |
e3c5de22 | 691 | struct xfs_attr_intent *attr) |
8b8e0cc0 | 692 | { |
d68c51e9 | 693 | struct xfs_da_args *args = attr->xattri_da_args; |
2b74b03c | 694 | int error, done; |
8b8e0cc0 AC |
695 | |
696 | /* | |
697 | * Unmap value blocks for this attr. | |
698 | */ | |
699 | error = xfs_bunmapi(args->trans, args->dp, args->rmtblkno, | |
700 | args->rmtblkcnt, XFS_BMAPI_ATTRFORK, 1, &done); | |
701 | if (error) | |
702 | return error; | |
703 | ||
2b74b03c AH |
704 | /* |
705 | * We don't need an explicit state here to pick up where we left off. We | |
706 | * can figure it out using the !done return code. The actual value of | |
707 | * attr->xattri_dela_state may be some value reminiscent of the calling | |
708 | * function, but it's value is irrelevant with in the context of this | |
709 | * function. Once we are done here, the next state is set as needed by | |
710 | * the parent | |
711 | */ | |
712 | if (!done) { | |
d68c51e9 AH |
713 | trace_xfs_attr_rmtval_remove_return(attr->xattri_dela_state, |
714 | args->dp); | |
8b8e0cc0 | 715 | return -EAGAIN; |
2b74b03c | 716 | } |
8b8e0cc0 | 717 | |
2b74b03c AH |
718 | args->rmtblkno = 0; |
719 | args->rmtblkcnt = 0; | |
720 | return 0; | |
8b8e0cc0 | 721 | } |