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1 | /* |
2 | * Copyright (C) 2005-2016 Junjiro R. Okajima | |
3 | * | |
4 | * This program, aufs is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | /* | |
19 | * mount options/flags | |
20 | */ | |
21 | ||
22 | #include <linux/namei.h> | |
23 | #include <linux/types.h> /* a distribution requires */ | |
24 | #include <linux/parser.h> | |
25 | #include "aufs.h" | |
26 | ||
27 | /* ---------------------------------------------------------------------- */ | |
28 | ||
29 | enum { | |
30 | Opt_br, | |
31 | Opt_add, Opt_del, Opt_mod, Opt_append, Opt_prepend, | |
32 | Opt_idel, Opt_imod, | |
33 | Opt_dirwh, Opt_rdcache, Opt_rdblk, Opt_rdhash, | |
34 | Opt_rdblk_def, Opt_rdhash_def, | |
35 | Opt_xino, Opt_noxino, | |
36 | Opt_trunc_xino, Opt_trunc_xino_v, Opt_notrunc_xino, | |
37 | Opt_trunc_xino_path, Opt_itrunc_xino, | |
38 | Opt_trunc_xib, Opt_notrunc_xib, | |
39 | Opt_shwh, Opt_noshwh, | |
40 | Opt_plink, Opt_noplink, Opt_list_plink, | |
41 | Opt_udba, | |
42 | Opt_dio, Opt_nodio, | |
43 | Opt_diropq_a, Opt_diropq_w, | |
44 | Opt_warn_perm, Opt_nowarn_perm, | |
45 | Opt_wbr_copyup, Opt_wbr_create, | |
46 | Opt_fhsm_sec, | |
47 | Opt_verbose, Opt_noverbose, | |
48 | Opt_sum, Opt_nosum, Opt_wsum, | |
49 | Opt_dirperm1, Opt_nodirperm1, | |
50 | Opt_acl, Opt_noacl, | |
51 | Opt_tail, Opt_ignore, Opt_ignore_silent, Opt_err | |
52 | }; | |
53 | ||
54 | static match_table_t options = { | |
55 | {Opt_br, "br=%s"}, | |
56 | {Opt_br, "br:%s"}, | |
57 | ||
58 | {Opt_add, "add=%d:%s"}, | |
59 | {Opt_add, "add:%d:%s"}, | |
60 | {Opt_add, "ins=%d:%s"}, | |
61 | {Opt_add, "ins:%d:%s"}, | |
62 | {Opt_append, "append=%s"}, | |
63 | {Opt_append, "append:%s"}, | |
64 | {Opt_prepend, "prepend=%s"}, | |
65 | {Opt_prepend, "prepend:%s"}, | |
66 | ||
67 | {Opt_del, "del=%s"}, | |
68 | {Opt_del, "del:%s"}, | |
69 | /* {Opt_idel, "idel:%d"}, */ | |
70 | {Opt_mod, "mod=%s"}, | |
71 | {Opt_mod, "mod:%s"}, | |
72 | /* {Opt_imod, "imod:%d:%s"}, */ | |
73 | ||
74 | {Opt_dirwh, "dirwh=%d"}, | |
75 | ||
76 | {Opt_xino, "xino=%s"}, | |
77 | {Opt_noxino, "noxino"}, | |
78 | {Opt_trunc_xino, "trunc_xino"}, | |
79 | {Opt_trunc_xino_v, "trunc_xino_v=%d:%d"}, | |
80 | {Opt_notrunc_xino, "notrunc_xino"}, | |
81 | {Opt_trunc_xino_path, "trunc_xino=%s"}, | |
82 | {Opt_itrunc_xino, "itrunc_xino=%d"}, | |
83 | /* {Opt_zxino, "zxino=%s"}, */ | |
84 | {Opt_trunc_xib, "trunc_xib"}, | |
85 | {Opt_notrunc_xib, "notrunc_xib"}, | |
86 | ||
87 | #ifdef CONFIG_PROC_FS | |
88 | {Opt_plink, "plink"}, | |
89 | #else | |
90 | {Opt_ignore_silent, "plink"}, | |
91 | #endif | |
92 | ||
93 | {Opt_noplink, "noplink"}, | |
94 | ||
95 | #ifdef CONFIG_AUFS_DEBUG | |
96 | {Opt_list_plink, "list_plink"}, | |
97 | #endif | |
98 | ||
99 | {Opt_udba, "udba=%s"}, | |
100 | ||
101 | {Opt_dio, "dio"}, | |
102 | {Opt_nodio, "nodio"}, | |
103 | ||
104 | #ifdef CONFIG_AUFS_FHSM | |
105 | {Opt_fhsm_sec, "fhsm_sec=%d"}, | |
106 | #else | |
107 | {Opt_ignore_silent, "fhsm_sec=%d"}, | |
108 | #endif | |
109 | ||
110 | {Opt_diropq_a, "diropq=always"}, | |
111 | {Opt_diropq_a, "diropq=a"}, | |
112 | {Opt_diropq_w, "diropq=whiteouted"}, | |
113 | {Opt_diropq_w, "diropq=w"}, | |
114 | ||
115 | {Opt_warn_perm, "warn_perm"}, | |
116 | {Opt_nowarn_perm, "nowarn_perm"}, | |
117 | ||
118 | /* keep them temporary */ | |
119 | {Opt_ignore_silent, "nodlgt"}, | |
120 | {Opt_ignore_silent, "clean_plink"}, | |
121 | ||
122 | #ifdef CONFIG_AUFS_SHWH | |
123 | {Opt_shwh, "shwh"}, | |
124 | #endif | |
125 | {Opt_noshwh, "noshwh"}, | |
126 | ||
127 | {Opt_dirperm1, "dirperm1"}, | |
128 | {Opt_nodirperm1, "nodirperm1"}, | |
129 | ||
130 | {Opt_verbose, "verbose"}, | |
131 | {Opt_verbose, "v"}, | |
132 | {Opt_noverbose, "noverbose"}, | |
133 | {Opt_noverbose, "quiet"}, | |
134 | {Opt_noverbose, "q"}, | |
135 | {Opt_noverbose, "silent"}, | |
136 | ||
137 | {Opt_sum, "sum"}, | |
138 | {Opt_nosum, "nosum"}, | |
139 | {Opt_wsum, "wsum"}, | |
140 | ||
141 | {Opt_rdcache, "rdcache=%d"}, | |
142 | {Opt_rdblk, "rdblk=%d"}, | |
143 | {Opt_rdblk_def, "rdblk=def"}, | |
144 | {Opt_rdhash, "rdhash=%d"}, | |
145 | {Opt_rdhash_def, "rdhash=def"}, | |
146 | ||
147 | {Opt_wbr_create, "create=%s"}, | |
148 | {Opt_wbr_create, "create_policy=%s"}, | |
149 | {Opt_wbr_copyup, "cpup=%s"}, | |
150 | {Opt_wbr_copyup, "copyup=%s"}, | |
151 | {Opt_wbr_copyup, "copyup_policy=%s"}, | |
152 | ||
153 | /* generic VFS flag */ | |
154 | #ifdef CONFIG_FS_POSIX_ACL | |
155 | {Opt_acl, "acl"}, | |
156 | {Opt_noacl, "noacl"}, | |
157 | #else | |
158 | {Opt_ignore_silent, "acl"}, | |
159 | {Opt_ignore_silent, "noacl"}, | |
160 | #endif | |
161 | ||
162 | /* internal use for the scripts */ | |
163 | {Opt_ignore_silent, "si=%s"}, | |
164 | ||
165 | {Opt_br, "dirs=%s"}, | |
166 | {Opt_ignore, "debug=%d"}, | |
167 | {Opt_ignore, "delete=whiteout"}, | |
168 | {Opt_ignore, "delete=all"}, | |
169 | {Opt_ignore, "imap=%s"}, | |
170 | ||
171 | /* temporary workaround, due to old mount(8)? */ | |
172 | {Opt_ignore_silent, "relatime"}, | |
173 | ||
174 | {Opt_err, NULL} | |
175 | }; | |
176 | ||
177 | /* ---------------------------------------------------------------------- */ | |
178 | ||
179 | static const char *au_parser_pattern(int val, match_table_t tbl) | |
180 | { | |
181 | struct match_token *p; | |
182 | ||
183 | p = tbl; | |
184 | while (p->pattern) { | |
185 | if (p->token == val) | |
186 | return p->pattern; | |
187 | p++; | |
188 | } | |
189 | BUG(); | |
190 | return "??"; | |
191 | } | |
192 | ||
193 | static const char *au_optstr(int *val, match_table_t tbl) | |
194 | { | |
195 | struct match_token *p; | |
196 | int v; | |
197 | ||
198 | v = *val; | |
199 | if (!v) | |
200 | goto out; | |
201 | p = tbl; | |
202 | while (p->pattern) { | |
203 | if (p->token | |
204 | && (v & p->token) == p->token) { | |
205 | *val &= ~p->token; | |
206 | return p->pattern; | |
207 | } | |
208 | p++; | |
209 | } | |
210 | ||
211 | out: | |
212 | return NULL; | |
213 | } | |
214 | ||
215 | /* ---------------------------------------------------------------------- */ | |
216 | ||
217 | static match_table_t brperm = { | |
218 | {AuBrPerm_RO, AUFS_BRPERM_RO}, | |
219 | {AuBrPerm_RR, AUFS_BRPERM_RR}, | |
220 | {AuBrPerm_RW, AUFS_BRPERM_RW}, | |
221 | {0, NULL} | |
222 | }; | |
223 | ||
224 | static match_table_t brattr = { | |
225 | /* general */ | |
226 | {AuBrAttr_COO_REG, AUFS_BRATTR_COO_REG}, | |
227 | {AuBrAttr_COO_ALL, AUFS_BRATTR_COO_ALL}, | |
228 | /* 'unpin' attrib is meaningless since linux-3.18-rc1 */ | |
229 | {AuBrAttr_UNPIN, AUFS_BRATTR_UNPIN}, | |
230 | #ifdef CONFIG_AUFS_FHSM | |
231 | {AuBrAttr_FHSM, AUFS_BRATTR_FHSM}, | |
232 | #endif | |
233 | #ifdef CONFIG_AUFS_XATTR | |
234 | {AuBrAttr_ICEX, AUFS_BRATTR_ICEX}, | |
235 | {AuBrAttr_ICEX_SEC, AUFS_BRATTR_ICEX_SEC}, | |
236 | {AuBrAttr_ICEX_SYS, AUFS_BRATTR_ICEX_SYS}, | |
237 | {AuBrAttr_ICEX_TR, AUFS_BRATTR_ICEX_TR}, | |
238 | {AuBrAttr_ICEX_USR, AUFS_BRATTR_ICEX_USR}, | |
239 | {AuBrAttr_ICEX_OTH, AUFS_BRATTR_ICEX_OTH}, | |
240 | #endif | |
241 | ||
242 | /* ro/rr branch */ | |
243 | {AuBrRAttr_WH, AUFS_BRRATTR_WH}, | |
244 | ||
245 | /* rw branch */ | |
246 | {AuBrWAttr_MOO, AUFS_BRWATTR_MOO}, | |
247 | {AuBrWAttr_NoLinkWH, AUFS_BRWATTR_NLWH}, | |
248 | ||
249 | {0, NULL} | |
250 | }; | |
251 | ||
252 | static int br_attr_val(char *str, match_table_t table, substring_t args[]) | |
253 | { | |
254 | int attr, v; | |
255 | char *p; | |
256 | ||
257 | attr = 0; | |
258 | do { | |
259 | p = strchr(str, '+'); | |
260 | if (p) | |
261 | *p = 0; | |
262 | v = match_token(str, table, args); | |
263 | if (v) { | |
264 | if (v & AuBrAttr_CMOO_Mask) | |
265 | attr &= ~AuBrAttr_CMOO_Mask; | |
266 | attr |= v; | |
267 | } else { | |
268 | if (p) | |
269 | *p = '+'; | |
270 | pr_warn("ignored branch attribute %s\n", str); | |
271 | break; | |
272 | } | |
273 | if (p) | |
274 | str = p + 1; | |
275 | } while (p); | |
276 | ||
277 | return attr; | |
278 | } | |
279 | ||
280 | static int au_do_optstr_br_attr(au_br_perm_str_t *str, int perm) | |
281 | { | |
282 | int sz; | |
283 | const char *p; | |
284 | char *q; | |
285 | ||
286 | q = str->a; | |
287 | *q = 0; | |
288 | p = au_optstr(&perm, brattr); | |
289 | if (p) { | |
290 | sz = strlen(p); | |
291 | memcpy(q, p, sz + 1); | |
292 | q += sz; | |
293 | } else | |
294 | goto out; | |
295 | ||
296 | do { | |
297 | p = au_optstr(&perm, brattr); | |
298 | if (p) { | |
299 | *q++ = '+'; | |
300 | sz = strlen(p); | |
301 | memcpy(q, p, sz + 1); | |
302 | q += sz; | |
303 | } | |
304 | } while (p); | |
305 | ||
306 | out: | |
307 | return q - str->a; | |
308 | } | |
309 | ||
310 | static int noinline_for_stack br_perm_val(char *perm) | |
311 | { | |
312 | int val, bad, sz; | |
313 | char *p; | |
314 | substring_t args[MAX_OPT_ARGS]; | |
315 | au_br_perm_str_t attr; | |
316 | ||
317 | p = strchr(perm, '+'); | |
318 | if (p) | |
319 | *p = 0; | |
320 | val = match_token(perm, brperm, args); | |
321 | if (!val) { | |
322 | if (p) | |
323 | *p = '+'; | |
324 | pr_warn("ignored branch permission %s\n", perm); | |
325 | val = AuBrPerm_RO; | |
326 | goto out; | |
327 | } | |
328 | if (!p) | |
329 | goto out; | |
330 | ||
331 | val |= br_attr_val(p + 1, brattr, args); | |
332 | ||
333 | bad = 0; | |
334 | switch (val & AuBrPerm_Mask) { | |
335 | case AuBrPerm_RO: | |
336 | case AuBrPerm_RR: | |
337 | bad = val & AuBrWAttr_Mask; | |
338 | val &= ~AuBrWAttr_Mask; | |
339 | break; | |
340 | case AuBrPerm_RW: | |
341 | bad = val & AuBrRAttr_Mask; | |
342 | val &= ~AuBrRAttr_Mask; | |
343 | break; | |
344 | } | |
345 | ||
346 | /* | |
347 | * 'unpin' attrib becomes meaningless since linux-3.18-rc1, but aufs | |
348 | * does not treat it as an error, just warning. | |
349 | * this is a tiny guard for the user operation. | |
350 | */ | |
351 | if (val & AuBrAttr_UNPIN) { | |
352 | bad |= AuBrAttr_UNPIN; | |
353 | val &= ~AuBrAttr_UNPIN; | |
354 | } | |
355 | ||
356 | if (unlikely(bad)) { | |
357 | sz = au_do_optstr_br_attr(&attr, bad); | |
358 | AuDebugOn(!sz); | |
359 | pr_warn("ignored branch attribute %s\n", attr.a); | |
360 | } | |
361 | ||
362 | out: | |
363 | return val; | |
364 | } | |
365 | ||
366 | void au_optstr_br_perm(au_br_perm_str_t *str, int perm) | |
367 | { | |
368 | au_br_perm_str_t attr; | |
369 | const char *p; | |
370 | char *q; | |
371 | int sz; | |
372 | ||
373 | q = str->a; | |
374 | p = au_optstr(&perm, brperm); | |
375 | AuDebugOn(!p || !*p); | |
376 | sz = strlen(p); | |
377 | memcpy(q, p, sz + 1); | |
378 | q += sz; | |
379 | ||
380 | sz = au_do_optstr_br_attr(&attr, perm); | |
381 | if (sz) { | |
382 | *q++ = '+'; | |
383 | memcpy(q, attr.a, sz + 1); | |
384 | } | |
385 | ||
386 | AuDebugOn(strlen(str->a) >= sizeof(str->a)); | |
387 | } | |
388 | ||
389 | /* ---------------------------------------------------------------------- */ | |
390 | ||
391 | static match_table_t udbalevel = { | |
392 | {AuOpt_UDBA_REVAL, "reval"}, | |
393 | {AuOpt_UDBA_NONE, "none"}, | |
394 | #ifdef CONFIG_AUFS_HNOTIFY | |
395 | {AuOpt_UDBA_HNOTIFY, "notify"}, /* abstraction */ | |
396 | #ifdef CONFIG_AUFS_HFSNOTIFY | |
397 | {AuOpt_UDBA_HNOTIFY, "fsnotify"}, | |
398 | #endif | |
399 | #endif | |
400 | {-1, NULL} | |
401 | }; | |
402 | ||
403 | static int noinline_for_stack udba_val(char *str) | |
404 | { | |
405 | substring_t args[MAX_OPT_ARGS]; | |
406 | ||
407 | return match_token(str, udbalevel, args); | |
408 | } | |
409 | ||
410 | const char *au_optstr_udba(int udba) | |
411 | { | |
412 | return au_parser_pattern(udba, udbalevel); | |
413 | } | |
414 | ||
415 | /* ---------------------------------------------------------------------- */ | |
416 | ||
417 | static match_table_t au_wbr_create_policy = { | |
418 | {AuWbrCreate_TDP, "tdp"}, | |
419 | {AuWbrCreate_TDP, "top-down-parent"}, | |
420 | {AuWbrCreate_RR, "rr"}, | |
421 | {AuWbrCreate_RR, "round-robin"}, | |
422 | {AuWbrCreate_MFS, "mfs"}, | |
423 | {AuWbrCreate_MFS, "most-free-space"}, | |
424 | {AuWbrCreate_MFSV, "mfs:%d"}, | |
425 | {AuWbrCreate_MFSV, "most-free-space:%d"}, | |
426 | ||
427 | /* top-down regardless the parent, and then mfs */ | |
428 | {AuWbrCreate_TDMFS, "tdmfs:%d"}, | |
429 | {AuWbrCreate_TDMFSV, "tdmfs:%d:%d"}, | |
430 | ||
431 | {AuWbrCreate_MFSRR, "mfsrr:%d"}, | |
432 | {AuWbrCreate_MFSRRV, "mfsrr:%d:%d"}, | |
433 | {AuWbrCreate_PMFS, "pmfs"}, | |
434 | {AuWbrCreate_PMFSV, "pmfs:%d"}, | |
435 | {AuWbrCreate_PMFSRR, "pmfsrr:%d"}, | |
436 | {AuWbrCreate_PMFSRRV, "pmfsrr:%d:%d"}, | |
437 | ||
438 | {-1, NULL} | |
439 | }; | |
440 | ||
441 | static int au_wbr_mfs_wmark(substring_t *arg, char *str, | |
442 | struct au_opt_wbr_create *create) | |
443 | { | |
444 | int err; | |
445 | unsigned long long ull; | |
446 | ||
447 | err = 0; | |
448 | if (!match_u64(arg, &ull)) | |
449 | create->mfsrr_watermark = ull; | |
450 | else { | |
451 | pr_err("bad integer in %s\n", str); | |
452 | err = -EINVAL; | |
453 | } | |
454 | ||
455 | return err; | |
456 | } | |
457 | ||
458 | static int au_wbr_mfs_sec(substring_t *arg, char *str, | |
459 | struct au_opt_wbr_create *create) | |
460 | { | |
461 | int n, err; | |
462 | ||
463 | err = 0; | |
464 | if (!match_int(arg, &n) && 0 <= n && n <= AUFS_MFS_MAX_SEC) | |
465 | create->mfs_second = n; | |
466 | else { | |
467 | pr_err("bad integer in %s\n", str); | |
468 | err = -EINVAL; | |
469 | } | |
470 | ||
471 | return err; | |
472 | } | |
473 | ||
474 | static int noinline_for_stack | |
475 | au_wbr_create_val(char *str, struct au_opt_wbr_create *create) | |
476 | { | |
477 | int err, e; | |
478 | substring_t args[MAX_OPT_ARGS]; | |
479 | ||
480 | err = match_token(str, au_wbr_create_policy, args); | |
481 | create->wbr_create = err; | |
482 | switch (err) { | |
483 | case AuWbrCreate_MFSRRV: | |
484 | case AuWbrCreate_TDMFSV: | |
485 | case AuWbrCreate_PMFSRRV: | |
486 | e = au_wbr_mfs_wmark(&args[0], str, create); | |
487 | if (!e) | |
488 | e = au_wbr_mfs_sec(&args[1], str, create); | |
489 | if (unlikely(e)) | |
490 | err = e; | |
491 | break; | |
492 | case AuWbrCreate_MFSRR: | |
493 | case AuWbrCreate_TDMFS: | |
494 | case AuWbrCreate_PMFSRR: | |
495 | e = au_wbr_mfs_wmark(&args[0], str, create); | |
496 | if (unlikely(e)) { | |
497 | err = e; | |
498 | break; | |
499 | } | |
500 | /*FALLTHROUGH*/ | |
501 | case AuWbrCreate_MFS: | |
502 | case AuWbrCreate_PMFS: | |
503 | create->mfs_second = AUFS_MFS_DEF_SEC; | |
504 | break; | |
505 | case AuWbrCreate_MFSV: | |
506 | case AuWbrCreate_PMFSV: | |
507 | e = au_wbr_mfs_sec(&args[0], str, create); | |
508 | if (unlikely(e)) | |
509 | err = e; | |
510 | break; | |
511 | } | |
512 | ||
513 | return err; | |
514 | } | |
515 | ||
516 | const char *au_optstr_wbr_create(int wbr_create) | |
517 | { | |
518 | return au_parser_pattern(wbr_create, au_wbr_create_policy); | |
519 | } | |
520 | ||
521 | static match_table_t au_wbr_copyup_policy = { | |
522 | {AuWbrCopyup_TDP, "tdp"}, | |
523 | {AuWbrCopyup_TDP, "top-down-parent"}, | |
524 | {AuWbrCopyup_BUP, "bup"}, | |
525 | {AuWbrCopyup_BUP, "bottom-up-parent"}, | |
526 | {AuWbrCopyup_BU, "bu"}, | |
527 | {AuWbrCopyup_BU, "bottom-up"}, | |
528 | {-1, NULL} | |
529 | }; | |
530 | ||
531 | static int noinline_for_stack au_wbr_copyup_val(char *str) | |
532 | { | |
533 | substring_t args[MAX_OPT_ARGS]; | |
534 | ||
535 | return match_token(str, au_wbr_copyup_policy, args); | |
536 | } | |
537 | ||
538 | const char *au_optstr_wbr_copyup(int wbr_copyup) | |
539 | { | |
540 | return au_parser_pattern(wbr_copyup, au_wbr_copyup_policy); | |
541 | } | |
542 | ||
543 | /* ---------------------------------------------------------------------- */ | |
544 | ||
545 | static const int lkup_dirflags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY; | |
546 | ||
547 | static void dump_opts(struct au_opts *opts) | |
548 | { | |
549 | #ifdef CONFIG_AUFS_DEBUG | |
550 | /* reduce stack space */ | |
551 | union { | |
552 | struct au_opt_add *add; | |
553 | struct au_opt_del *del; | |
554 | struct au_opt_mod *mod; | |
555 | struct au_opt_xino *xino; | |
556 | struct au_opt_xino_itrunc *xino_itrunc; | |
557 | struct au_opt_wbr_create *create; | |
558 | } u; | |
559 | struct au_opt *opt; | |
560 | ||
561 | opt = opts->opt; | |
562 | while (opt->type != Opt_tail) { | |
563 | switch (opt->type) { | |
564 | case Opt_add: | |
565 | u.add = &opt->add; | |
566 | AuDbg("add {b%d, %s, 0x%x, %p}\n", | |
567 | u.add->bindex, u.add->pathname, u.add->perm, | |
568 | u.add->path.dentry); | |
569 | break; | |
570 | case Opt_del: | |
571 | case Opt_idel: | |
572 | u.del = &opt->del; | |
573 | AuDbg("del {%s, %p}\n", | |
574 | u.del->pathname, u.del->h_path.dentry); | |
575 | break; | |
576 | case Opt_mod: | |
577 | case Opt_imod: | |
578 | u.mod = &opt->mod; | |
579 | AuDbg("mod {%s, 0x%x, %p}\n", | |
580 | u.mod->path, u.mod->perm, u.mod->h_root); | |
581 | break; | |
582 | case Opt_append: | |
583 | u.add = &opt->add; | |
584 | AuDbg("append {b%d, %s, 0x%x, %p}\n", | |
585 | u.add->bindex, u.add->pathname, u.add->perm, | |
586 | u.add->path.dentry); | |
587 | break; | |
588 | case Opt_prepend: | |
589 | u.add = &opt->add; | |
590 | AuDbg("prepend {b%d, %s, 0x%x, %p}\n", | |
591 | u.add->bindex, u.add->pathname, u.add->perm, | |
592 | u.add->path.dentry); | |
593 | break; | |
594 | case Opt_dirwh: | |
595 | AuDbg("dirwh %d\n", opt->dirwh); | |
596 | break; | |
597 | case Opt_rdcache: | |
598 | AuDbg("rdcache %d\n", opt->rdcache); | |
599 | break; | |
600 | case Opt_rdblk: | |
601 | AuDbg("rdblk %u\n", opt->rdblk); | |
602 | break; | |
603 | case Opt_rdblk_def: | |
604 | AuDbg("rdblk_def\n"); | |
605 | break; | |
606 | case Opt_rdhash: | |
607 | AuDbg("rdhash %u\n", opt->rdhash); | |
608 | break; | |
609 | case Opt_rdhash_def: | |
610 | AuDbg("rdhash_def\n"); | |
611 | break; | |
612 | case Opt_xino: | |
613 | u.xino = &opt->xino; | |
614 | AuDbg("xino {%s %pD}\n", u.xino->path, u.xino->file); | |
615 | break; | |
616 | case Opt_trunc_xino: | |
617 | AuLabel(trunc_xino); | |
618 | break; | |
619 | case Opt_notrunc_xino: | |
620 | AuLabel(notrunc_xino); | |
621 | break; | |
622 | case Opt_trunc_xino_path: | |
623 | case Opt_itrunc_xino: | |
624 | u.xino_itrunc = &opt->xino_itrunc; | |
625 | AuDbg("trunc_xino %d\n", u.xino_itrunc->bindex); | |
626 | break; | |
627 | case Opt_noxino: | |
628 | AuLabel(noxino); | |
629 | break; | |
630 | case Opt_trunc_xib: | |
631 | AuLabel(trunc_xib); | |
632 | break; | |
633 | case Opt_notrunc_xib: | |
634 | AuLabel(notrunc_xib); | |
635 | break; | |
636 | case Opt_shwh: | |
637 | AuLabel(shwh); | |
638 | break; | |
639 | case Opt_noshwh: | |
640 | AuLabel(noshwh); | |
641 | break; | |
642 | case Opt_dirperm1: | |
643 | AuLabel(dirperm1); | |
644 | break; | |
645 | case Opt_nodirperm1: | |
646 | AuLabel(nodirperm1); | |
647 | break; | |
648 | case Opt_plink: | |
649 | AuLabel(plink); | |
650 | break; | |
651 | case Opt_noplink: | |
652 | AuLabel(noplink); | |
653 | break; | |
654 | case Opt_list_plink: | |
655 | AuLabel(list_plink); | |
656 | break; | |
657 | case Opt_udba: | |
658 | AuDbg("udba %d, %s\n", | |
659 | opt->udba, au_optstr_udba(opt->udba)); | |
660 | break; | |
661 | case Opt_dio: | |
662 | AuLabel(dio); | |
663 | break; | |
664 | case Opt_nodio: | |
665 | AuLabel(nodio); | |
666 | break; | |
667 | case Opt_diropq_a: | |
668 | AuLabel(diropq_a); | |
669 | break; | |
670 | case Opt_diropq_w: | |
671 | AuLabel(diropq_w); | |
672 | break; | |
673 | case Opt_warn_perm: | |
674 | AuLabel(warn_perm); | |
675 | break; | |
676 | case Opt_nowarn_perm: | |
677 | AuLabel(nowarn_perm); | |
678 | break; | |
679 | case Opt_verbose: | |
680 | AuLabel(verbose); | |
681 | break; | |
682 | case Opt_noverbose: | |
683 | AuLabel(noverbose); | |
684 | break; | |
685 | case Opt_sum: | |
686 | AuLabel(sum); | |
687 | break; | |
688 | case Opt_nosum: | |
689 | AuLabel(nosum); | |
690 | break; | |
691 | case Opt_wsum: | |
692 | AuLabel(wsum); | |
693 | break; | |
694 | case Opt_wbr_create: | |
695 | u.create = &opt->wbr_create; | |
696 | AuDbg("create %d, %s\n", u.create->wbr_create, | |
697 | au_optstr_wbr_create(u.create->wbr_create)); | |
698 | switch (u.create->wbr_create) { | |
699 | case AuWbrCreate_MFSV: | |
700 | case AuWbrCreate_PMFSV: | |
701 | AuDbg("%d sec\n", u.create->mfs_second); | |
702 | break; | |
703 | case AuWbrCreate_MFSRR: | |
704 | case AuWbrCreate_TDMFS: | |
705 | AuDbg("%llu watermark\n", | |
706 | u.create->mfsrr_watermark); | |
707 | break; | |
708 | case AuWbrCreate_MFSRRV: | |
709 | case AuWbrCreate_TDMFSV: | |
710 | case AuWbrCreate_PMFSRRV: | |
711 | AuDbg("%llu watermark, %d sec\n", | |
712 | u.create->mfsrr_watermark, | |
713 | u.create->mfs_second); | |
714 | break; | |
715 | } | |
716 | break; | |
717 | case Opt_wbr_copyup: | |
718 | AuDbg("copyup %d, %s\n", opt->wbr_copyup, | |
719 | au_optstr_wbr_copyup(opt->wbr_copyup)); | |
720 | break; | |
721 | case Opt_fhsm_sec: | |
722 | AuDbg("fhsm_sec %u\n", opt->fhsm_second); | |
723 | break; | |
724 | case Opt_acl: | |
725 | AuLabel(acl); | |
726 | break; | |
727 | case Opt_noacl: | |
728 | AuLabel(noacl); | |
729 | break; | |
730 | default: | |
731 | BUG(); | |
732 | } | |
733 | opt++; | |
734 | } | |
735 | #endif | |
736 | } | |
737 | ||
738 | void au_opts_free(struct au_opts *opts) | |
739 | { | |
740 | struct au_opt *opt; | |
741 | ||
742 | opt = opts->opt; | |
743 | while (opt->type != Opt_tail) { | |
744 | switch (opt->type) { | |
745 | case Opt_add: | |
746 | case Opt_append: | |
747 | case Opt_prepend: | |
748 | path_put(&opt->add.path); | |
749 | break; | |
750 | case Opt_del: | |
751 | case Opt_idel: | |
752 | path_put(&opt->del.h_path); | |
753 | break; | |
754 | case Opt_mod: | |
755 | case Opt_imod: | |
756 | dput(opt->mod.h_root); | |
757 | break; | |
758 | case Opt_xino: | |
759 | fput(opt->xino.file); | |
760 | break; | |
761 | } | |
762 | opt++; | |
763 | } | |
764 | } | |
765 | ||
766 | static int opt_add(struct au_opt *opt, char *opt_str, unsigned long sb_flags, | |
767 | aufs_bindex_t bindex) | |
768 | { | |
769 | int err; | |
770 | struct au_opt_add *add = &opt->add; | |
771 | char *p; | |
772 | ||
773 | add->bindex = bindex; | |
774 | add->perm = AuBrPerm_RO; | |
775 | add->pathname = opt_str; | |
776 | p = strchr(opt_str, '='); | |
777 | if (p) { | |
778 | *p++ = 0; | |
779 | if (*p) | |
780 | add->perm = br_perm_val(p); | |
781 | } | |
782 | ||
783 | err = vfsub_kern_path(add->pathname, lkup_dirflags, &add->path); | |
784 | if (!err) { | |
785 | if (!p) { | |
786 | add->perm = AuBrPerm_RO; | |
787 | if (au_test_fs_rr(add->path.dentry->d_sb)) | |
788 | add->perm = AuBrPerm_RR; | |
789 | else if (!bindex && !(sb_flags & MS_RDONLY)) | |
790 | add->perm = AuBrPerm_RW; | |
791 | } | |
792 | opt->type = Opt_add; | |
793 | goto out; | |
794 | } | |
795 | pr_err("lookup failed %s (%d)\n", add->pathname, err); | |
796 | err = -EINVAL; | |
797 | ||
798 | out: | |
799 | return err; | |
800 | } | |
801 | ||
802 | static int au_opts_parse_del(struct au_opt_del *del, substring_t args[]) | |
803 | { | |
804 | int err; | |
805 | ||
806 | del->pathname = args[0].from; | |
807 | AuDbg("del path %s\n", del->pathname); | |
808 | ||
809 | err = vfsub_kern_path(del->pathname, lkup_dirflags, &del->h_path); | |
810 | if (unlikely(err)) | |
811 | pr_err("lookup failed %s (%d)\n", del->pathname, err); | |
812 | ||
813 | return err; | |
814 | } | |
815 | ||
816 | #if 0 /* reserved for future use */ | |
817 | static int au_opts_parse_idel(struct super_block *sb, aufs_bindex_t bindex, | |
818 | struct au_opt_del *del, substring_t args[]) | |
819 | { | |
820 | int err; | |
821 | struct dentry *root; | |
822 | ||
823 | err = -EINVAL; | |
824 | root = sb->s_root; | |
825 | aufs_read_lock(root, AuLock_FLUSH); | |
826 | if (bindex < 0 || au_sbbot(sb) < bindex) { | |
827 | pr_err("out of bounds, %d\n", bindex); | |
828 | goto out; | |
829 | } | |
830 | ||
831 | err = 0; | |
832 | del->h_path.dentry = dget(au_h_dptr(root, bindex)); | |
833 | del->h_path.mnt = mntget(au_sbr_mnt(sb, bindex)); | |
834 | ||
835 | out: | |
836 | aufs_read_unlock(root, !AuLock_IR); | |
837 | return err; | |
838 | } | |
839 | #endif | |
840 | ||
841 | static int noinline_for_stack | |
842 | au_opts_parse_mod(struct au_opt_mod *mod, substring_t args[]) | |
843 | { | |
844 | int err; | |
845 | struct path path; | |
846 | char *p; | |
847 | ||
848 | err = -EINVAL; | |
849 | mod->path = args[0].from; | |
850 | p = strchr(mod->path, '='); | |
851 | if (unlikely(!p)) { | |
852 | pr_err("no permssion %s\n", args[0].from); | |
853 | goto out; | |
854 | } | |
855 | ||
856 | *p++ = 0; | |
857 | err = vfsub_kern_path(mod->path, lkup_dirflags, &path); | |
858 | if (unlikely(err)) { | |
859 | pr_err("lookup failed %s (%d)\n", mod->path, err); | |
860 | goto out; | |
861 | } | |
862 | ||
863 | mod->perm = br_perm_val(p); | |
864 | AuDbg("mod path %s, perm 0x%x, %s\n", mod->path, mod->perm, p); | |
865 | mod->h_root = dget(path.dentry); | |
866 | path_put(&path); | |
867 | ||
868 | out: | |
869 | return err; | |
870 | } | |
871 | ||
872 | #if 0 /* reserved for future use */ | |
873 | static int au_opts_parse_imod(struct super_block *sb, aufs_bindex_t bindex, | |
874 | struct au_opt_mod *mod, substring_t args[]) | |
875 | { | |
876 | int err; | |
877 | struct dentry *root; | |
878 | ||
879 | err = -EINVAL; | |
880 | root = sb->s_root; | |
881 | aufs_read_lock(root, AuLock_FLUSH); | |
882 | if (bindex < 0 || au_sbbot(sb) < bindex) { | |
883 | pr_err("out of bounds, %d\n", bindex); | |
884 | goto out; | |
885 | } | |
886 | ||
887 | err = 0; | |
888 | mod->perm = br_perm_val(args[1].from); | |
889 | AuDbg("mod path %s, perm 0x%x, %s\n", | |
890 | mod->path, mod->perm, args[1].from); | |
891 | mod->h_root = dget(au_h_dptr(root, bindex)); | |
892 | ||
893 | out: | |
894 | aufs_read_unlock(root, !AuLock_IR); | |
895 | return err; | |
896 | } | |
897 | #endif | |
898 | ||
899 | static int au_opts_parse_xino(struct super_block *sb, struct au_opt_xino *xino, | |
900 | substring_t args[]) | |
901 | { | |
902 | int err; | |
903 | struct file *file; | |
904 | ||
905 | file = au_xino_create(sb, args[0].from, /*silent*/0); | |
906 | err = PTR_ERR(file); | |
907 | if (IS_ERR(file)) | |
908 | goto out; | |
909 | ||
910 | err = -EINVAL; | |
911 | if (unlikely(file->f_path.dentry->d_sb == sb)) { | |
912 | fput(file); | |
913 | pr_err("%s must be outside\n", args[0].from); | |
914 | goto out; | |
915 | } | |
916 | ||
917 | err = 0; | |
918 | xino->file = file; | |
919 | xino->path = args[0].from; | |
920 | ||
921 | out: | |
922 | return err; | |
923 | } | |
924 | ||
925 | static int noinline_for_stack | |
926 | au_opts_parse_xino_itrunc_path(struct super_block *sb, | |
927 | struct au_opt_xino_itrunc *xino_itrunc, | |
928 | substring_t args[]) | |
929 | { | |
930 | int err; | |
931 | aufs_bindex_t bbot, bindex; | |
932 | struct path path; | |
933 | struct dentry *root; | |
934 | ||
935 | err = vfsub_kern_path(args[0].from, lkup_dirflags, &path); | |
936 | if (unlikely(err)) { | |
937 | pr_err("lookup failed %s (%d)\n", args[0].from, err); | |
938 | goto out; | |
939 | } | |
940 | ||
941 | xino_itrunc->bindex = -1; | |
942 | root = sb->s_root; | |
943 | aufs_read_lock(root, AuLock_FLUSH); | |
944 | bbot = au_sbbot(sb); | |
945 | for (bindex = 0; bindex <= bbot; bindex++) { | |
946 | if (au_h_dptr(root, bindex) == path.dentry) { | |
947 | xino_itrunc->bindex = bindex; | |
948 | break; | |
949 | } | |
950 | } | |
951 | aufs_read_unlock(root, !AuLock_IR); | |
952 | path_put(&path); | |
953 | ||
954 | if (unlikely(xino_itrunc->bindex < 0)) { | |
955 | pr_err("no such branch %s\n", args[0].from); | |
956 | err = -EINVAL; | |
957 | } | |
958 | ||
959 | out: | |
960 | return err; | |
961 | } | |
962 | ||
963 | /* called without aufs lock */ | |
964 | int au_opts_parse(struct super_block *sb, char *str, struct au_opts *opts) | |
965 | { | |
966 | int err, n, token; | |
967 | aufs_bindex_t bindex; | |
968 | unsigned char skipped; | |
969 | struct dentry *root; | |
970 | struct au_opt *opt, *opt_tail; | |
971 | char *opt_str; | |
972 | /* reduce the stack space */ | |
973 | union { | |
974 | struct au_opt_xino_itrunc *xino_itrunc; | |
975 | struct au_opt_wbr_create *create; | |
976 | } u; | |
977 | struct { | |
978 | substring_t args[MAX_OPT_ARGS]; | |
979 | } *a; | |
980 | ||
981 | err = -ENOMEM; | |
982 | a = kmalloc(sizeof(*a), GFP_NOFS); | |
983 | if (unlikely(!a)) | |
984 | goto out; | |
985 | ||
986 | root = sb->s_root; | |
987 | err = 0; | |
988 | bindex = 0; | |
989 | opt = opts->opt; | |
990 | opt_tail = opt + opts->max_opt - 1; | |
991 | opt->type = Opt_tail; | |
992 | while (!err && (opt_str = strsep(&str, ",")) && *opt_str) { | |
993 | err = -EINVAL; | |
994 | skipped = 0; | |
995 | token = match_token(opt_str, options, a->args); | |
996 | switch (token) { | |
997 | case Opt_br: | |
998 | err = 0; | |
999 | while (!err && (opt_str = strsep(&a->args[0].from, ":")) | |
1000 | && *opt_str) { | |
1001 | err = opt_add(opt, opt_str, opts->sb_flags, | |
1002 | bindex++); | |
1003 | if (unlikely(!err && ++opt > opt_tail)) { | |
1004 | err = -E2BIG; | |
1005 | break; | |
1006 | } | |
1007 | opt->type = Opt_tail; | |
1008 | skipped = 1; | |
1009 | } | |
1010 | break; | |
1011 | case Opt_add: | |
1012 | if (unlikely(match_int(&a->args[0], &n))) { | |
1013 | pr_err("bad integer in %s\n", opt_str); | |
1014 | break; | |
1015 | } | |
1016 | bindex = n; | |
1017 | err = opt_add(opt, a->args[1].from, opts->sb_flags, | |
1018 | bindex); | |
1019 | if (!err) | |
1020 | opt->type = token; | |
1021 | break; | |
1022 | case Opt_append: | |
1023 | err = opt_add(opt, a->args[0].from, opts->sb_flags, | |
1024 | /*dummy bindex*/1); | |
1025 | if (!err) | |
1026 | opt->type = token; | |
1027 | break; | |
1028 | case Opt_prepend: | |
1029 | err = opt_add(opt, a->args[0].from, opts->sb_flags, | |
1030 | /*bindex*/0); | |
1031 | if (!err) | |
1032 | opt->type = token; | |
1033 | break; | |
1034 | case Opt_del: | |
1035 | err = au_opts_parse_del(&opt->del, a->args); | |
1036 | if (!err) | |
1037 | opt->type = token; | |
1038 | break; | |
1039 | #if 0 /* reserved for future use */ | |
1040 | case Opt_idel: | |
1041 | del->pathname = "(indexed)"; | |
1042 | if (unlikely(match_int(&args[0], &n))) { | |
1043 | pr_err("bad integer in %s\n", opt_str); | |
1044 | break; | |
1045 | } | |
1046 | err = au_opts_parse_idel(sb, n, &opt->del, a->args); | |
1047 | if (!err) | |
1048 | opt->type = token; | |
1049 | break; | |
1050 | #endif | |
1051 | case Opt_mod: | |
1052 | err = au_opts_parse_mod(&opt->mod, a->args); | |
1053 | if (!err) | |
1054 | opt->type = token; | |
1055 | break; | |
1056 | #ifdef IMOD /* reserved for future use */ | |
1057 | case Opt_imod: | |
1058 | u.mod->path = "(indexed)"; | |
1059 | if (unlikely(match_int(&a->args[0], &n))) { | |
1060 | pr_err("bad integer in %s\n", opt_str); | |
1061 | break; | |
1062 | } | |
1063 | err = au_opts_parse_imod(sb, n, &opt->mod, a->args); | |
1064 | if (!err) | |
1065 | opt->type = token; | |
1066 | break; | |
1067 | #endif | |
1068 | case Opt_xino: | |
1069 | err = au_opts_parse_xino(sb, &opt->xino, a->args); | |
1070 | if (!err) | |
1071 | opt->type = token; | |
1072 | break; | |
1073 | ||
1074 | case Opt_trunc_xino_path: | |
1075 | err = au_opts_parse_xino_itrunc_path | |
1076 | (sb, &opt->xino_itrunc, a->args); | |
1077 | if (!err) | |
1078 | opt->type = token; | |
1079 | break; | |
1080 | ||
1081 | case Opt_itrunc_xino: | |
1082 | u.xino_itrunc = &opt->xino_itrunc; | |
1083 | if (unlikely(match_int(&a->args[0], &n))) { | |
1084 | pr_err("bad integer in %s\n", opt_str); | |
1085 | break; | |
1086 | } | |
1087 | u.xino_itrunc->bindex = n; | |
1088 | aufs_read_lock(root, AuLock_FLUSH); | |
1089 | if (n < 0 || au_sbbot(sb) < n) { | |
1090 | pr_err("out of bounds, %d\n", n); | |
1091 | aufs_read_unlock(root, !AuLock_IR); | |
1092 | break; | |
1093 | } | |
1094 | aufs_read_unlock(root, !AuLock_IR); | |
1095 | err = 0; | |
1096 | opt->type = token; | |
1097 | break; | |
1098 | ||
1099 | case Opt_dirwh: | |
1100 | if (unlikely(match_int(&a->args[0], &opt->dirwh))) | |
1101 | break; | |
1102 | err = 0; | |
1103 | opt->type = token; | |
1104 | break; | |
1105 | ||
1106 | case Opt_rdcache: | |
1107 | if (unlikely(match_int(&a->args[0], &n))) { | |
1108 | pr_err("bad integer in %s\n", opt_str); | |
1109 | break; | |
1110 | } | |
1111 | if (unlikely(n > AUFS_RDCACHE_MAX)) { | |
1112 | pr_err("rdcache must be smaller than %d\n", | |
1113 | AUFS_RDCACHE_MAX); | |
1114 | break; | |
1115 | } | |
1116 | opt->rdcache = n; | |
1117 | err = 0; | |
1118 | opt->type = token; | |
1119 | break; | |
1120 | case Opt_rdblk: | |
1121 | if (unlikely(match_int(&a->args[0], &n) | |
1122 | || n < 0 | |
1123 | || n > KMALLOC_MAX_SIZE)) { | |
1124 | pr_err("bad integer in %s\n", opt_str); | |
1125 | break; | |
1126 | } | |
1127 | if (unlikely(n && n < NAME_MAX)) { | |
1128 | pr_err("rdblk must be larger than %d\n", | |
1129 | NAME_MAX); | |
1130 | break; | |
1131 | } | |
1132 | opt->rdblk = n; | |
1133 | err = 0; | |
1134 | opt->type = token; | |
1135 | break; | |
1136 | case Opt_rdhash: | |
1137 | if (unlikely(match_int(&a->args[0], &n) | |
1138 | || n < 0 | |
1139 | || n * sizeof(struct hlist_head) | |
1140 | > KMALLOC_MAX_SIZE)) { | |
1141 | pr_err("bad integer in %s\n", opt_str); | |
1142 | break; | |
1143 | } | |
1144 | opt->rdhash = n; | |
1145 | err = 0; | |
1146 | opt->type = token; | |
1147 | break; | |
1148 | ||
1149 | case Opt_trunc_xino: | |
1150 | case Opt_notrunc_xino: | |
1151 | case Opt_noxino: | |
1152 | case Opt_trunc_xib: | |
1153 | case Opt_notrunc_xib: | |
1154 | case Opt_shwh: | |
1155 | case Opt_noshwh: | |
1156 | case Opt_dirperm1: | |
1157 | case Opt_nodirperm1: | |
1158 | case Opt_plink: | |
1159 | case Opt_noplink: | |
1160 | case Opt_list_plink: | |
1161 | case Opt_dio: | |
1162 | case Opt_nodio: | |
1163 | case Opt_diropq_a: | |
1164 | case Opt_diropq_w: | |
1165 | case Opt_warn_perm: | |
1166 | case Opt_nowarn_perm: | |
1167 | case Opt_verbose: | |
1168 | case Opt_noverbose: | |
1169 | case Opt_sum: | |
1170 | case Opt_nosum: | |
1171 | case Opt_wsum: | |
1172 | case Opt_rdblk_def: | |
1173 | case Opt_rdhash_def: | |
1174 | case Opt_acl: | |
1175 | case Opt_noacl: | |
1176 | err = 0; | |
1177 | opt->type = token; | |
1178 | break; | |
1179 | ||
1180 | case Opt_udba: | |
1181 | opt->udba = udba_val(a->args[0].from); | |
1182 | if (opt->udba >= 0) { | |
1183 | err = 0; | |
1184 | opt->type = token; | |
1185 | } else | |
1186 | pr_err("wrong value, %s\n", opt_str); | |
1187 | break; | |
1188 | ||
1189 | case Opt_wbr_create: | |
1190 | u.create = &opt->wbr_create; | |
1191 | u.create->wbr_create | |
1192 | = au_wbr_create_val(a->args[0].from, u.create); | |
1193 | if (u.create->wbr_create >= 0) { | |
1194 | err = 0; | |
1195 | opt->type = token; | |
1196 | } else | |
1197 | pr_err("wrong value, %s\n", opt_str); | |
1198 | break; | |
1199 | case Opt_wbr_copyup: | |
1200 | opt->wbr_copyup = au_wbr_copyup_val(a->args[0].from); | |
1201 | if (opt->wbr_copyup >= 0) { | |
1202 | err = 0; | |
1203 | opt->type = token; | |
1204 | } else | |
1205 | pr_err("wrong value, %s\n", opt_str); | |
1206 | break; | |
1207 | ||
1208 | case Opt_fhsm_sec: | |
1209 | if (unlikely(match_int(&a->args[0], &n) | |
1210 | || n < 0)) { | |
1211 | pr_err("bad integer in %s\n", opt_str); | |
1212 | break; | |
1213 | } | |
1214 | if (sysaufs_brs) { | |
1215 | opt->fhsm_second = n; | |
1216 | opt->type = token; | |
1217 | } else | |
1218 | pr_warn("ignored %s\n", opt_str); | |
1219 | err = 0; | |
1220 | break; | |
1221 | ||
1222 | case Opt_ignore: | |
1223 | pr_warn("ignored %s\n", opt_str); | |
1224 | /*FALLTHROUGH*/ | |
1225 | case Opt_ignore_silent: | |
1226 | skipped = 1; | |
1227 | err = 0; | |
1228 | break; | |
1229 | case Opt_err: | |
1230 | pr_err("unknown option %s\n", opt_str); | |
1231 | break; | |
1232 | } | |
1233 | ||
1234 | if (!err && !skipped) { | |
1235 | if (unlikely(++opt > opt_tail)) { | |
1236 | err = -E2BIG; | |
1237 | opt--; | |
1238 | opt->type = Opt_tail; | |
1239 | break; | |
1240 | } | |
1241 | opt->type = Opt_tail; | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | au_delayed_kfree(a); | |
1246 | dump_opts(opts); | |
1247 | if (unlikely(err)) | |
1248 | au_opts_free(opts); | |
1249 | ||
1250 | out: | |
1251 | return err; | |
1252 | } | |
1253 | ||
1254 | static int au_opt_wbr_create(struct super_block *sb, | |
1255 | struct au_opt_wbr_create *create) | |
1256 | { | |
1257 | int err; | |
1258 | struct au_sbinfo *sbinfo; | |
1259 | ||
1260 | SiMustWriteLock(sb); | |
1261 | ||
1262 | err = 1; /* handled */ | |
1263 | sbinfo = au_sbi(sb); | |
1264 | if (sbinfo->si_wbr_create_ops->fin) { | |
1265 | err = sbinfo->si_wbr_create_ops->fin(sb); | |
1266 | if (!err) | |
1267 | err = 1; | |
1268 | } | |
1269 | ||
1270 | sbinfo->si_wbr_create = create->wbr_create; | |
1271 | sbinfo->si_wbr_create_ops = au_wbr_create_ops + create->wbr_create; | |
1272 | switch (create->wbr_create) { | |
1273 | case AuWbrCreate_MFSRRV: | |
1274 | case AuWbrCreate_MFSRR: | |
1275 | case AuWbrCreate_TDMFS: | |
1276 | case AuWbrCreate_TDMFSV: | |
1277 | case AuWbrCreate_PMFSRR: | |
1278 | case AuWbrCreate_PMFSRRV: | |
1279 | sbinfo->si_wbr_mfs.mfsrr_watermark = create->mfsrr_watermark; | |
1280 | /*FALLTHROUGH*/ | |
1281 | case AuWbrCreate_MFS: | |
1282 | case AuWbrCreate_MFSV: | |
1283 | case AuWbrCreate_PMFS: | |
1284 | case AuWbrCreate_PMFSV: | |
1285 | sbinfo->si_wbr_mfs.mfs_expire | |
1286 | = msecs_to_jiffies(create->mfs_second * MSEC_PER_SEC); | |
1287 | break; | |
1288 | } | |
1289 | ||
1290 | if (sbinfo->si_wbr_create_ops->init) | |
1291 | sbinfo->si_wbr_create_ops->init(sb); /* ignore */ | |
1292 | ||
1293 | return err; | |
1294 | } | |
1295 | ||
1296 | /* | |
1297 | * returns, | |
1298 | * plus: processed without an error | |
1299 | * zero: unprocessed | |
1300 | */ | |
1301 | static int au_opt_simple(struct super_block *sb, struct au_opt *opt, | |
1302 | struct au_opts *opts) | |
1303 | { | |
1304 | int err; | |
1305 | struct au_sbinfo *sbinfo; | |
1306 | ||
1307 | SiMustWriteLock(sb); | |
1308 | ||
1309 | err = 1; /* handled */ | |
1310 | sbinfo = au_sbi(sb); | |
1311 | switch (opt->type) { | |
1312 | case Opt_udba: | |
1313 | sbinfo->si_mntflags &= ~AuOptMask_UDBA; | |
1314 | sbinfo->si_mntflags |= opt->udba; | |
1315 | opts->given_udba |= opt->udba; | |
1316 | break; | |
1317 | ||
1318 | case Opt_plink: | |
1319 | au_opt_set(sbinfo->si_mntflags, PLINK); | |
1320 | break; | |
1321 | case Opt_noplink: | |
1322 | if (au_opt_test(sbinfo->si_mntflags, PLINK)) | |
1323 | au_plink_put(sb, /*verbose*/1); | |
1324 | au_opt_clr(sbinfo->si_mntflags, PLINK); | |
1325 | break; | |
1326 | case Opt_list_plink: | |
1327 | if (au_opt_test(sbinfo->si_mntflags, PLINK)) | |
1328 | au_plink_list(sb); | |
1329 | break; | |
1330 | ||
1331 | case Opt_dio: | |
1332 | au_opt_set(sbinfo->si_mntflags, DIO); | |
1333 | au_fset_opts(opts->flags, REFRESH_DYAOP); | |
1334 | break; | |
1335 | case Opt_nodio: | |
1336 | au_opt_clr(sbinfo->si_mntflags, DIO); | |
1337 | au_fset_opts(opts->flags, REFRESH_DYAOP); | |
1338 | break; | |
1339 | ||
1340 | case Opt_fhsm_sec: | |
1341 | au_fhsm_set(sbinfo, opt->fhsm_second); | |
1342 | break; | |
1343 | ||
1344 | case Opt_diropq_a: | |
1345 | au_opt_set(sbinfo->si_mntflags, ALWAYS_DIROPQ); | |
1346 | break; | |
1347 | case Opt_diropq_w: | |
1348 | au_opt_clr(sbinfo->si_mntflags, ALWAYS_DIROPQ); | |
1349 | break; | |
1350 | ||
1351 | case Opt_warn_perm: | |
1352 | au_opt_set(sbinfo->si_mntflags, WARN_PERM); | |
1353 | break; | |
1354 | case Opt_nowarn_perm: | |
1355 | au_opt_clr(sbinfo->si_mntflags, WARN_PERM); | |
1356 | break; | |
1357 | ||
1358 | case Opt_verbose: | |
1359 | au_opt_set(sbinfo->si_mntflags, VERBOSE); | |
1360 | break; | |
1361 | case Opt_noverbose: | |
1362 | au_opt_clr(sbinfo->si_mntflags, VERBOSE); | |
1363 | break; | |
1364 | ||
1365 | case Opt_sum: | |
1366 | au_opt_set(sbinfo->si_mntflags, SUM); | |
1367 | break; | |
1368 | case Opt_wsum: | |
1369 | au_opt_clr(sbinfo->si_mntflags, SUM); | |
1370 | au_opt_set(sbinfo->si_mntflags, SUM_W); | |
1371 | case Opt_nosum: | |
1372 | au_opt_clr(sbinfo->si_mntflags, SUM); | |
1373 | au_opt_clr(sbinfo->si_mntflags, SUM_W); | |
1374 | break; | |
1375 | ||
1376 | case Opt_wbr_create: | |
1377 | err = au_opt_wbr_create(sb, &opt->wbr_create); | |
1378 | break; | |
1379 | case Opt_wbr_copyup: | |
1380 | sbinfo->si_wbr_copyup = opt->wbr_copyup; | |
1381 | sbinfo->si_wbr_copyup_ops = au_wbr_copyup_ops + opt->wbr_copyup; | |
1382 | break; | |
1383 | ||
1384 | case Opt_dirwh: | |
1385 | sbinfo->si_dirwh = opt->dirwh; | |
1386 | break; | |
1387 | ||
1388 | case Opt_rdcache: | |
1389 | sbinfo->si_rdcache | |
1390 | = msecs_to_jiffies(opt->rdcache * MSEC_PER_SEC); | |
1391 | break; | |
1392 | case Opt_rdblk: | |
1393 | sbinfo->si_rdblk = opt->rdblk; | |
1394 | break; | |
1395 | case Opt_rdblk_def: | |
1396 | sbinfo->si_rdblk = AUFS_RDBLK_DEF; | |
1397 | break; | |
1398 | case Opt_rdhash: | |
1399 | sbinfo->si_rdhash = opt->rdhash; | |
1400 | break; | |
1401 | case Opt_rdhash_def: | |
1402 | sbinfo->si_rdhash = AUFS_RDHASH_DEF; | |
1403 | break; | |
1404 | ||
1405 | case Opt_shwh: | |
1406 | au_opt_set(sbinfo->si_mntflags, SHWH); | |
1407 | break; | |
1408 | case Opt_noshwh: | |
1409 | au_opt_clr(sbinfo->si_mntflags, SHWH); | |
1410 | break; | |
1411 | ||
1412 | case Opt_dirperm1: | |
1413 | au_opt_set(sbinfo->si_mntflags, DIRPERM1); | |
1414 | break; | |
1415 | case Opt_nodirperm1: | |
1416 | au_opt_clr(sbinfo->si_mntflags, DIRPERM1); | |
1417 | break; | |
1418 | ||
1419 | case Opt_trunc_xino: | |
1420 | au_opt_set(sbinfo->si_mntflags, TRUNC_XINO); | |
1421 | break; | |
1422 | case Opt_notrunc_xino: | |
1423 | au_opt_clr(sbinfo->si_mntflags, TRUNC_XINO); | |
1424 | break; | |
1425 | ||
1426 | case Opt_trunc_xino_path: | |
1427 | case Opt_itrunc_xino: | |
1428 | err = au_xino_trunc(sb, opt->xino_itrunc.bindex); | |
1429 | if (!err) | |
1430 | err = 1; | |
1431 | break; | |
1432 | ||
1433 | case Opt_trunc_xib: | |
1434 | au_fset_opts(opts->flags, TRUNC_XIB); | |
1435 | break; | |
1436 | case Opt_notrunc_xib: | |
1437 | au_fclr_opts(opts->flags, TRUNC_XIB); | |
1438 | break; | |
1439 | ||
1440 | case Opt_acl: | |
1441 | sb->s_flags |= MS_POSIXACL; | |
1442 | break; | |
1443 | case Opt_noacl: | |
1444 | sb->s_flags &= ~MS_POSIXACL; | |
1445 | break; | |
1446 | ||
1447 | default: | |
1448 | err = 0; | |
1449 | break; | |
1450 | } | |
1451 | ||
1452 | return err; | |
1453 | } | |
1454 | ||
1455 | /* | |
1456 | * returns tri-state. | |
1457 | * plus: processed without an error | |
1458 | * zero: unprocessed | |
1459 | * minus: error | |
1460 | */ | |
1461 | static int au_opt_br(struct super_block *sb, struct au_opt *opt, | |
1462 | struct au_opts *opts) | |
1463 | { | |
1464 | int err, do_refresh; | |
1465 | ||
1466 | err = 0; | |
1467 | switch (opt->type) { | |
1468 | case Opt_append: | |
1469 | opt->add.bindex = au_sbbot(sb) + 1; | |
1470 | if (opt->add.bindex < 0) | |
1471 | opt->add.bindex = 0; | |
1472 | goto add; | |
1473 | case Opt_prepend: | |
1474 | opt->add.bindex = 0; | |
1475 | add: /* indented label */ | |
1476 | case Opt_add: | |
1477 | err = au_br_add(sb, &opt->add, | |
1478 | au_ftest_opts(opts->flags, REMOUNT)); | |
1479 | if (!err) { | |
1480 | err = 1; | |
1481 | au_fset_opts(opts->flags, REFRESH); | |
1482 | } | |
1483 | break; | |
1484 | ||
1485 | case Opt_del: | |
1486 | case Opt_idel: | |
1487 | err = au_br_del(sb, &opt->del, | |
1488 | au_ftest_opts(opts->flags, REMOUNT)); | |
1489 | if (!err) { | |
1490 | err = 1; | |
1491 | au_fset_opts(opts->flags, TRUNC_XIB); | |
1492 | au_fset_opts(opts->flags, REFRESH); | |
1493 | } | |
1494 | break; | |
1495 | ||
1496 | case Opt_mod: | |
1497 | case Opt_imod: | |
1498 | err = au_br_mod(sb, &opt->mod, | |
1499 | au_ftest_opts(opts->flags, REMOUNT), | |
1500 | &do_refresh); | |
1501 | if (!err) { | |
1502 | err = 1; | |
1503 | if (do_refresh) | |
1504 | au_fset_opts(opts->flags, REFRESH); | |
1505 | } | |
1506 | break; | |
1507 | } | |
1508 | ||
1509 | return err; | |
1510 | } | |
1511 | ||
1512 | static int au_opt_xino(struct super_block *sb, struct au_opt *opt, | |
1513 | struct au_opt_xino **opt_xino, | |
1514 | struct au_opts *opts) | |
1515 | { | |
1516 | int err; | |
1517 | aufs_bindex_t bbot, bindex; | |
1518 | struct dentry *root, *parent, *h_root; | |
1519 | ||
1520 | err = 0; | |
1521 | switch (opt->type) { | |
1522 | case Opt_xino: | |
1523 | err = au_xino_set(sb, &opt->xino, | |
1524 | !!au_ftest_opts(opts->flags, REMOUNT)); | |
1525 | if (unlikely(err)) | |
1526 | break; | |
1527 | ||
1528 | *opt_xino = &opt->xino; | |
1529 | au_xino_brid_set(sb, -1); | |
1530 | ||
1531 | /* safe d_parent access */ | |
1532 | parent = opt->xino.file->f_path.dentry->d_parent; | |
1533 | root = sb->s_root; | |
1534 | bbot = au_sbbot(sb); | |
1535 | for (bindex = 0; bindex <= bbot; bindex++) { | |
1536 | h_root = au_h_dptr(root, bindex); | |
1537 | if (h_root == parent) { | |
1538 | au_xino_brid_set(sb, au_sbr_id(sb, bindex)); | |
1539 | break; | |
1540 | } | |
1541 | } | |
1542 | break; | |
1543 | ||
1544 | case Opt_noxino: | |
1545 | au_xino_clr(sb); | |
1546 | au_xino_brid_set(sb, -1); | |
1547 | *opt_xino = (void *)-1; | |
1548 | break; | |
1549 | } | |
1550 | ||
1551 | return err; | |
1552 | } | |
1553 | ||
1554 | int au_opts_verify(struct super_block *sb, unsigned long sb_flags, | |
1555 | unsigned int pending) | |
1556 | { | |
1557 | int err, fhsm; | |
1558 | aufs_bindex_t bindex, bbot; | |
1559 | unsigned char do_plink, skip, do_free, can_no_dreval; | |
1560 | struct au_branch *br; | |
1561 | struct au_wbr *wbr; | |
1562 | struct dentry *root, *dentry; | |
1563 | struct inode *dir, *h_dir; | |
1564 | struct au_sbinfo *sbinfo; | |
1565 | struct au_hinode *hdir; | |
1566 | ||
1567 | SiMustAnyLock(sb); | |
1568 | ||
1569 | sbinfo = au_sbi(sb); | |
1570 | AuDebugOn(!(sbinfo->si_mntflags & AuOptMask_UDBA)); | |
1571 | ||
1572 | if (!(sb_flags & MS_RDONLY)) { | |
1573 | if (unlikely(!au_br_writable(au_sbr_perm(sb, 0)))) | |
1574 | pr_warn("first branch should be rw\n"); | |
1575 | if (unlikely(au_opt_test(sbinfo->si_mntflags, SHWH))) | |
1576 | pr_warn_once("shwh should be used with ro\n"); | |
1577 | } | |
1578 | ||
1579 | if (au_opt_test((sbinfo->si_mntflags | pending), UDBA_HNOTIFY) | |
1580 | && !au_opt_test(sbinfo->si_mntflags, XINO)) | |
1581 | pr_warn_once("udba=*notify requires xino\n"); | |
1582 | ||
1583 | if (au_opt_test(sbinfo->si_mntflags, DIRPERM1)) | |
1584 | pr_warn_once("dirperm1 breaks the protection" | |
1585 | " by the permission bits on the lower branch\n"); | |
1586 | ||
1587 | err = 0; | |
1588 | fhsm = 0; | |
1589 | root = sb->s_root; | |
1590 | dir = d_inode(root); | |
1591 | do_plink = !!au_opt_test(sbinfo->si_mntflags, PLINK); | |
1592 | can_no_dreval = !!au_opt_test((sbinfo->si_mntflags | pending), | |
1593 | UDBA_NONE); | |
1594 | bbot = au_sbbot(sb); | |
1595 | for (bindex = 0; !err && bindex <= bbot; bindex++) { | |
1596 | skip = 0; | |
1597 | h_dir = au_h_iptr(dir, bindex); | |
1598 | br = au_sbr(sb, bindex); | |
1599 | ||
1600 | if ((br->br_perm & AuBrAttr_ICEX) | |
1601 | && !h_dir->i_op->listxattr) | |
1602 | br->br_perm &= ~AuBrAttr_ICEX; | |
1603 | #if 0 | |
1604 | if ((br->br_perm & AuBrAttr_ICEX_SEC) | |
1605 | && (au_br_sb(br)->s_flags & MS_NOSEC)) | |
1606 | br->br_perm &= ~AuBrAttr_ICEX_SEC; | |
1607 | #endif | |
1608 | ||
1609 | do_free = 0; | |
1610 | wbr = br->br_wbr; | |
1611 | if (wbr) | |
1612 | wbr_wh_read_lock(wbr); | |
1613 | ||
1614 | if (!au_br_writable(br->br_perm)) { | |
1615 | do_free = !!wbr; | |
1616 | skip = (!wbr | |
1617 | || (!wbr->wbr_whbase | |
1618 | && !wbr->wbr_plink | |
1619 | && !wbr->wbr_orph)); | |
1620 | } else if (!au_br_wh_linkable(br->br_perm)) { | |
1621 | /* skip = (!br->br_whbase && !br->br_orph); */ | |
1622 | skip = (!wbr || !wbr->wbr_whbase); | |
1623 | if (skip && wbr) { | |
1624 | if (do_plink) | |
1625 | skip = !!wbr->wbr_plink; | |
1626 | else | |
1627 | skip = !wbr->wbr_plink; | |
1628 | } | |
1629 | } else { | |
1630 | /* skip = (br->br_whbase && br->br_ohph); */ | |
1631 | skip = (wbr && wbr->wbr_whbase); | |
1632 | if (skip) { | |
1633 | if (do_plink) | |
1634 | skip = !!wbr->wbr_plink; | |
1635 | else | |
1636 | skip = !wbr->wbr_plink; | |
1637 | } | |
1638 | } | |
1639 | if (wbr) | |
1640 | wbr_wh_read_unlock(wbr); | |
1641 | ||
1642 | if (can_no_dreval) { | |
1643 | dentry = br->br_path.dentry; | |
1644 | spin_lock(&dentry->d_lock); | |
1645 | if (dentry->d_flags & | |
1646 | (DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE)) | |
1647 | can_no_dreval = 0; | |
1648 | spin_unlock(&dentry->d_lock); | |
1649 | } | |
1650 | ||
1651 | if (au_br_fhsm(br->br_perm)) { | |
1652 | fhsm++; | |
1653 | AuDebugOn(!br->br_fhsm); | |
1654 | } | |
1655 | ||
1656 | if (skip) | |
1657 | continue; | |
1658 | ||
1659 | hdir = au_hi(dir, bindex); | |
1660 | au_hn_inode_lock_nested(hdir, AuLsc_I_PARENT); | |
1661 | if (wbr) | |
1662 | wbr_wh_write_lock(wbr); | |
1663 | err = au_wh_init(br, sb); | |
1664 | if (wbr) | |
1665 | wbr_wh_write_unlock(wbr); | |
1666 | au_hn_inode_unlock(hdir); | |
1667 | ||
1668 | if (!err && do_free) { | |
1669 | if (wbr) | |
1670 | au_delayed_kfree(wbr); | |
1671 | br->br_wbr = NULL; | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | if (can_no_dreval) | |
1676 | au_fset_si(sbinfo, NO_DREVAL); | |
1677 | else | |
1678 | au_fclr_si(sbinfo, NO_DREVAL); | |
1679 | ||
1680 | if (fhsm >= 2) { | |
1681 | au_fset_si(sbinfo, FHSM); | |
1682 | for (bindex = bbot; bindex >= 0; bindex--) { | |
1683 | br = au_sbr(sb, bindex); | |
1684 | if (au_br_fhsm(br->br_perm)) { | |
1685 | au_fhsm_set_bottom(sb, bindex); | |
1686 | break; | |
1687 | } | |
1688 | } | |
1689 | } else { | |
1690 | au_fclr_si(sbinfo, FHSM); | |
1691 | au_fhsm_set_bottom(sb, -1); | |
1692 | } | |
1693 | ||
1694 | return err; | |
1695 | } | |
1696 | ||
1697 | int au_opts_mount(struct super_block *sb, struct au_opts *opts) | |
1698 | { | |
1699 | int err; | |
1700 | unsigned int tmp; | |
1701 | aufs_bindex_t bindex, bbot; | |
1702 | struct au_opt *opt; | |
1703 | struct au_opt_xino *opt_xino, xino; | |
1704 | struct au_sbinfo *sbinfo; | |
1705 | struct au_branch *br; | |
1706 | struct inode *dir; | |
1707 | ||
1708 | SiMustWriteLock(sb); | |
1709 | ||
1710 | err = 0; | |
1711 | opt_xino = NULL; | |
1712 | opt = opts->opt; | |
1713 | while (err >= 0 && opt->type != Opt_tail) | |
1714 | err = au_opt_simple(sb, opt++, opts); | |
1715 | if (err > 0) | |
1716 | err = 0; | |
1717 | else if (unlikely(err < 0)) | |
1718 | goto out; | |
1719 | ||
1720 | /* disable xino and udba temporary */ | |
1721 | sbinfo = au_sbi(sb); | |
1722 | tmp = sbinfo->si_mntflags; | |
1723 | au_opt_clr(sbinfo->si_mntflags, XINO); | |
1724 | au_opt_set_udba(sbinfo->si_mntflags, UDBA_REVAL); | |
1725 | ||
1726 | opt = opts->opt; | |
1727 | while (err >= 0 && opt->type != Opt_tail) | |
1728 | err = au_opt_br(sb, opt++, opts); | |
1729 | if (err > 0) | |
1730 | err = 0; | |
1731 | else if (unlikely(err < 0)) | |
1732 | goto out; | |
1733 | ||
1734 | bbot = au_sbbot(sb); | |
1735 | if (unlikely(bbot < 0)) { | |
1736 | err = -EINVAL; | |
1737 | pr_err("no branches\n"); | |
1738 | goto out; | |
1739 | } | |
1740 | ||
1741 | if (au_opt_test(tmp, XINO)) | |
1742 | au_opt_set(sbinfo->si_mntflags, XINO); | |
1743 | opt = opts->opt; | |
1744 | while (!err && opt->type != Opt_tail) | |
1745 | err = au_opt_xino(sb, opt++, &opt_xino, opts); | |
1746 | if (unlikely(err)) | |
1747 | goto out; | |
1748 | ||
1749 | err = au_opts_verify(sb, sb->s_flags, tmp); | |
1750 | if (unlikely(err)) | |
1751 | goto out; | |
1752 | ||
1753 | /* restore xino */ | |
1754 | if (au_opt_test(tmp, XINO) && !opt_xino) { | |
1755 | xino.file = au_xino_def(sb); | |
1756 | err = PTR_ERR(xino.file); | |
1757 | if (IS_ERR(xino.file)) | |
1758 | goto out; | |
1759 | ||
1760 | err = au_xino_set(sb, &xino, /*remount*/0); | |
1761 | fput(xino.file); | |
1762 | if (unlikely(err)) | |
1763 | goto out; | |
1764 | } | |
1765 | ||
1766 | /* restore udba */ | |
1767 | tmp &= AuOptMask_UDBA; | |
1768 | sbinfo->si_mntflags &= ~AuOptMask_UDBA; | |
1769 | sbinfo->si_mntflags |= tmp; | |
1770 | bbot = au_sbbot(sb); | |
1771 | for (bindex = 0; bindex <= bbot; bindex++) { | |
1772 | br = au_sbr(sb, bindex); | |
1773 | err = au_hnotify_reset_br(tmp, br, br->br_perm); | |
1774 | if (unlikely(err)) | |
1775 | AuIOErr("hnotify failed on br %d, %d, ignored\n", | |
1776 | bindex, err); | |
1777 | /* go on even if err */ | |
1778 | } | |
1779 | if (au_opt_test(tmp, UDBA_HNOTIFY)) { | |
1780 | dir = d_inode(sb->s_root); | |
1781 | au_hn_reset(dir, au_hi_flags(dir, /*isdir*/1) & ~AuHi_XINO); | |
1782 | } | |
1783 | ||
1784 | out: | |
1785 | return err; | |
1786 | } | |
1787 | ||
1788 | int au_opts_remount(struct super_block *sb, struct au_opts *opts) | |
1789 | { | |
1790 | int err, rerr; | |
1791 | unsigned char no_dreval; | |
1792 | struct inode *dir; | |
1793 | struct au_opt_xino *opt_xino; | |
1794 | struct au_opt *opt; | |
1795 | struct au_sbinfo *sbinfo; | |
1796 | ||
1797 | SiMustWriteLock(sb); | |
1798 | ||
1799 | err = 0; | |
1800 | dir = d_inode(sb->s_root); | |
1801 | sbinfo = au_sbi(sb); | |
1802 | opt_xino = NULL; | |
1803 | opt = opts->opt; | |
1804 | while (err >= 0 && opt->type != Opt_tail) { | |
1805 | err = au_opt_simple(sb, opt, opts); | |
1806 | if (!err) | |
1807 | err = au_opt_br(sb, opt, opts); | |
1808 | if (!err) | |
1809 | err = au_opt_xino(sb, opt, &opt_xino, opts); | |
1810 | opt++; | |
1811 | } | |
1812 | if (err > 0) | |
1813 | err = 0; | |
1814 | AuTraceErr(err); | |
1815 | /* go on even err */ | |
1816 | ||
1817 | no_dreval = !!au_ftest_si(sbinfo, NO_DREVAL); | |
1818 | rerr = au_opts_verify(sb, opts->sb_flags, /*pending*/0); | |
1819 | if (unlikely(rerr && !err)) | |
1820 | err = rerr; | |
1821 | ||
1822 | if (no_dreval != !!au_ftest_si(sbinfo, NO_DREVAL)) | |
1823 | au_fset_opts(opts->flags, REFRESH_IDOP); | |
1824 | ||
1825 | if (au_ftest_opts(opts->flags, TRUNC_XIB)) { | |
1826 | rerr = au_xib_trunc(sb); | |
1827 | if (unlikely(rerr && !err)) | |
1828 | err = rerr; | |
1829 | } | |
1830 | ||
1831 | /* will be handled by the caller */ | |
1832 | if (!au_ftest_opts(opts->flags, REFRESH) | |
1833 | && (opts->given_udba | |
1834 | || au_opt_test(sbinfo->si_mntflags, XINO) | |
1835 | || au_ftest_opts(opts->flags, REFRESH_IDOP) | |
1836 | )) | |
1837 | au_fset_opts(opts->flags, REFRESH); | |
1838 | ||
1839 | AuDbg("status 0x%x\n", opts->flags); | |
1840 | return err; | |
1841 | } | |
1842 | ||
1843 | /* ---------------------------------------------------------------------- */ | |
1844 | ||
1845 | unsigned int au_opt_udba(struct super_block *sb) | |
1846 | { | |
1847 | return au_mntflags(sb) & AuOptMask_UDBA; | |
1848 | } |