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Commit | Line | Data |
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9f107513 AL |
1 | /* |
2 | * Virtio 9p backend | |
3 | * | |
4 | * Copyright IBM, Corp. 2010 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
fbc04127 | 14 | #include "qemu/osdep.h" |
e3e83f2e | 15 | #include <glib/gprintf.h> |
0d09e41a | 16 | #include "hw/virtio/virtio.h" |
da34e65c | 17 | #include "qapi/error.h" |
d49b6836 | 18 | #include "qemu/error-report.h" |
cd4bfbb2 | 19 | #include "qemu/iov.h" |
1de7afc9 | 20 | #include "qemu/sockets.h" |
9f107513 AL |
21 | #include "virtio-9p.h" |
22 | #include "fsdev/qemu-fsdev.h" | |
267ae092 | 23 | #include "9p-xattr.h" |
fe52840c | 24 | #include "coth.h" |
c572f23a | 25 | #include "trace.h" |
caf71f86 | 26 | #include "migration/migration.h" |
9f107513 | 27 | |
7a462745 AK |
28 | int open_fd_hw; |
29 | int total_open_fd; | |
30 | static int open_fd_rc; | |
9f107513 | 31 | |
fac4f111 VJ |
32 | enum { |
33 | Oread = 0x00, | |
34 | Owrite = 0x01, | |
35 | Ordwr = 0x02, | |
36 | Oexec = 0x03, | |
37 | Oexcl = 0x04, | |
38 | Otrunc = 0x10, | |
39 | Orexec = 0x20, | |
40 | Orclose = 0x40, | |
41 | Oappend = 0x80, | |
42 | }; | |
43 | ||
0e2082d9 WL |
44 | ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
45 | { | |
46 | ssize_t ret; | |
47 | va_list ap; | |
48 | ||
49 | va_start(ap, fmt); | |
fe9fa96d | 50 | ret = virtio_pdu_vmarshal(pdu, offset, fmt, ap); |
0e2082d9 WL |
51 | va_end(ap); |
52 | ||
53 | return ret; | |
54 | } | |
55 | ||
56 | ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
57 | { | |
58 | ssize_t ret; | |
59 | va_list ap; | |
60 | ||
61 | va_start(ap, fmt); | |
fe9fa96d | 62 | ret = virtio_pdu_vunmarshal(pdu, offset, fmt, ap); |
0e2082d9 WL |
63 | va_end(ap); |
64 | ||
65 | return ret; | |
66 | } | |
67 | ||
f657b17a WL |
68 | static void pdu_push_and_notify(V9fsPDU *pdu) |
69 | { | |
0d3716b4 | 70 | virtio_9p_push_and_notify(pdu); |
f657b17a WL |
71 | } |
72 | ||
fac4f111 VJ |
73 | static int omode_to_uflags(int8_t mode) |
74 | { | |
75 | int ret = 0; | |
76 | ||
77 | switch (mode & 3) { | |
78 | case Oread: | |
79 | ret = O_RDONLY; | |
80 | break; | |
81 | case Ordwr: | |
82 | ret = O_RDWR; | |
83 | break; | |
84 | case Owrite: | |
85 | ret = O_WRONLY; | |
86 | break; | |
87 | case Oexec: | |
88 | ret = O_RDONLY; | |
89 | break; | |
90 | } | |
91 | ||
92 | if (mode & Otrunc) { | |
93 | ret |= O_TRUNC; | |
94 | } | |
95 | ||
96 | if (mode & Oappend) { | |
97 | ret |= O_APPEND; | |
98 | } | |
99 | ||
100 | if (mode & Oexcl) { | |
101 | ret |= O_EXCL; | |
102 | } | |
103 | ||
104 | return ret; | |
105 | } | |
106 | ||
9844081b MK |
107 | struct dotl_openflag_map { |
108 | int dotl_flag; | |
109 | int open_flag; | |
110 | }; | |
111 | ||
112 | static int dotl_to_open_flags(int flags) | |
113 | { | |
114 | int i; | |
115 | /* | |
116 | * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY | |
117 | * and P9_DOTL_NOACCESS | |
118 | */ | |
119 | int oflags = flags & O_ACCMODE; | |
120 | ||
121 | struct dotl_openflag_map dotl_oflag_map[] = { | |
122 | { P9_DOTL_CREATE, O_CREAT }, | |
123 | { P9_DOTL_EXCL, O_EXCL }, | |
124 | { P9_DOTL_NOCTTY , O_NOCTTY }, | |
125 | { P9_DOTL_TRUNC, O_TRUNC }, | |
126 | { P9_DOTL_APPEND, O_APPEND }, | |
127 | { P9_DOTL_NONBLOCK, O_NONBLOCK } , | |
128 | { P9_DOTL_DSYNC, O_DSYNC }, | |
129 | { P9_DOTL_FASYNC, FASYNC }, | |
130 | { P9_DOTL_DIRECT, O_DIRECT }, | |
131 | { P9_DOTL_LARGEFILE, O_LARGEFILE }, | |
132 | { P9_DOTL_DIRECTORY, O_DIRECTORY }, | |
133 | { P9_DOTL_NOFOLLOW, O_NOFOLLOW }, | |
134 | { P9_DOTL_NOATIME, O_NOATIME }, | |
135 | { P9_DOTL_SYNC, O_SYNC }, | |
136 | }; | |
137 | ||
138 | for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { | |
139 | if (flags & dotl_oflag_map[i].dotl_flag) { | |
140 | oflags |= dotl_oflag_map[i].open_flag; | |
141 | } | |
142 | } | |
143 | ||
144 | return oflags; | |
145 | } | |
146 | ||
758e8e38 | 147 | void cred_init(FsCred *credp) |
131dcb25 | 148 | { |
758e8e38 VJ |
149 | credp->fc_uid = -1; |
150 | credp->fc_gid = -1; | |
151 | credp->fc_mode = -1; | |
152 | credp->fc_rdev = -1; | |
131dcb25 AL |
153 | } |
154 | ||
d3ab98e6 AK |
155 | static int get_dotl_openflags(V9fsState *s, int oflags) |
156 | { | |
157 | int flags; | |
158 | /* | |
159 | * Filter the client open flags | |
160 | */ | |
9844081b MK |
161 | flags = dotl_to_open_flags(oflags); |
162 | flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); | |
d3ab98e6 AK |
163 | /* |
164 | * Ignore direct disk access hint until the server supports it. | |
165 | */ | |
166 | flags &= ~O_DIRECT; | |
167 | return flags; | |
168 | } | |
169 | ||
2289be19 AK |
170 | void v9fs_path_init(V9fsPath *path) |
171 | { | |
172 | path->data = NULL; | |
173 | path->size = 0; | |
174 | } | |
175 | ||
176 | void v9fs_path_free(V9fsPath *path) | |
177 | { | |
178 | g_free(path->data); | |
179 | path->data = NULL; | |
180 | path->size = 0; | |
181 | } | |
182 | ||
e3e83f2e GK |
183 | |
184 | void GCC_FMT_ATTR(2, 3) | |
185 | v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...) | |
186 | { | |
187 | va_list ap; | |
188 | ||
189 | v9fs_path_free(path); | |
190 | ||
191 | va_start(ap, fmt); | |
192 | /* Bump the size for including terminating NULL */ | |
193 | path->size = g_vasprintf(&path->data, fmt, ap) + 1; | |
194 | va_end(ap); | |
195 | } | |
196 | ||
2289be19 AK |
197 | void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs) |
198 | { | |
199 | v9fs_path_free(lhs); | |
200 | lhs->data = g_malloc(rhs->size); | |
201 | memcpy(lhs->data, rhs->data, rhs->size); | |
202 | lhs->size = rhs->size; | |
203 | } | |
204 | ||
205 | int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, | |
206 | const char *name, V9fsPath *path) | |
207 | { | |
208 | int err; | |
209 | err = s->ops->name_to_path(&s->ctx, dirpath, name, path); | |
210 | if (err < 0) { | |
211 | err = -errno; | |
212 | } | |
213 | return err; | |
214 | } | |
215 | ||
936532a4 MN |
216 | /* |
217 | * Return TRUE if s1 is an ancestor of s2. | |
218 | * | |
219 | * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". | |
220 | * As a special case, We treat s1 as ancestor of s2 if they are same! | |
221 | */ | |
2289be19 | 222 | static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) |
936532a4 | 223 | { |
2289be19 AK |
224 | if (!strncmp(s1->data, s2->data, s1->size - 1)) { |
225 | if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { | |
936532a4 MN |
226 | return 1; |
227 | } | |
228 | } | |
229 | return 0; | |
230 | } | |
231 | ||
a03f7874 AL |
232 | static size_t v9fs_string_size(V9fsString *str) |
233 | { | |
234 | return str->size; | |
235 | } | |
236 | ||
b9cb88b0 AK |
237 | /* |
238 | * returns 0 if fid got re-opened, 1 if not, < 0 on error */ | |
8440e22e | 239 | static int coroutine_fn v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) |
b9cb88b0 AK |
240 | { |
241 | int err = 1; | |
242 | if (f->fid_type == P9_FID_FILE) { | |
243 | if (f->fs.fd == -1) { | |
244 | do { | |
bccacf6c AK |
245 | err = v9fs_co_open(pdu, f, f->open_flags); |
246 | } while (err == -EINTR && !pdu->cancelled); | |
b9cb88b0 AK |
247 | } |
248 | } else if (f->fid_type == P9_FID_DIR) { | |
f314ea4e | 249 | if (f->fs.dir.stream == NULL) { |
b9cb88b0 | 250 | do { |
bccacf6c AK |
251 | err = v9fs_co_opendir(pdu, f); |
252 | } while (err == -EINTR && !pdu->cancelled); | |
b9cb88b0 AK |
253 | } |
254 | } | |
255 | return err; | |
256 | } | |
257 | ||
8440e22e | 258 | static V9fsFidState *coroutine_fn get_fid(V9fsPDU *pdu, int32_t fid) |
286d5652 | 259 | { |
7a462745 | 260 | int err; |
286d5652 | 261 | V9fsFidState *f; |
bccacf6c | 262 | V9fsState *s = pdu->s; |
286d5652 AL |
263 | |
264 | for (f = s->fid_list; f; f = f->next) { | |
84dfb926 | 265 | BUG_ON(f->clunked); |
286d5652 | 266 | if (f->fid == fid) { |
7a462745 AK |
267 | /* |
268 | * Update the fid ref upfront so that | |
269 | * we don't get reclaimed when we yield | |
270 | * in open later. | |
271 | */ | |
84dfb926 | 272 | f->ref++; |
7a462745 AK |
273 | /* |
274 | * check whether we need to reopen the | |
275 | * file. We might have closed the fd | |
276 | * while trying to free up some file | |
277 | * descriptors. | |
278 | */ | |
bccacf6c | 279 | err = v9fs_reopen_fid(pdu, f); |
b9cb88b0 AK |
280 | if (err < 0) { |
281 | f->ref--; | |
282 | return NULL; | |
283 | } | |
7a462745 AK |
284 | /* |
285 | * Mark the fid as referenced so that the LRU | |
286 | * reclaim won't close the file descriptor | |
287 | */ | |
288 | f->flags |= FID_REFERENCED; | |
286d5652 AL |
289 | return f; |
290 | } | |
291 | } | |
286d5652 AL |
292 | return NULL; |
293 | } | |
294 | ||
295 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
296 | { | |
297 | V9fsFidState *f; | |
298 | ||
84dfb926 AK |
299 | for (f = s->fid_list; f; f = f->next) { |
300 | /* If fid is already there return NULL */ | |
301 | BUG_ON(f->clunked); | |
302 | if (f->fid == fid) { | |
303 | return NULL; | |
304 | } | |
286d5652 | 305 | } |
7267c094 | 306 | f = g_malloc0(sizeof(V9fsFidState)); |
286d5652 | 307 | f->fid = fid; |
d62dbb51 | 308 | f->fid_type = P9_FID_NONE; |
84dfb926 | 309 | f->ref = 1; |
7a462745 AK |
310 | /* |
311 | * Mark the fid as referenced so that the LRU | |
312 | * reclaim won't close the file descriptor | |
313 | */ | |
314 | f->flags |= FID_REFERENCED; | |
286d5652 AL |
315 | f->next = s->fid_list; |
316 | s->fid_list = f; | |
317 | ||
7cde47d4 GK |
318 | v9fs_readdir_init(&f->fs.dir); |
319 | v9fs_readdir_init(&f->fs_reclaim.dir); | |
320 | ||
286d5652 AL |
321 | return f; |
322 | } | |
323 | ||
8440e22e | 324 | static int coroutine_fn v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) |
10b468bd AK |
325 | { |
326 | int retval = 0; | |
327 | ||
328 | if (fidp->fs.xattr.copied_len == -1) { | |
329 | /* getxattr/listxattr fid */ | |
330 | goto free_value; | |
331 | } | |
332 | /* | |
333 | * if this is fid for setxattr. clunk should | |
334 | * result in setxattr localcall | |
335 | */ | |
336 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { | |
337 | /* clunk after partial write */ | |
338 | retval = -EINVAL; | |
339 | goto free_out; | |
340 | } | |
9ed3ef26 | 341 | if (fidp->fs.xattr.len) { |
bccacf6c | 342 | retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, |
9ed3ef26 AK |
343 | fidp->fs.xattr.value, |
344 | fidp->fs.xattr.len, | |
345 | fidp->fs.xattr.flags); | |
346 | } else { | |
bccacf6c | 347 | retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); |
9ed3ef26 | 348 | } |
10b468bd AK |
349 | free_out: |
350 | v9fs_string_free(&fidp->fs.xattr.name); | |
351 | free_value: | |
9e288406 | 352 | g_free(fidp->fs.xattr.value); |
10b468bd AK |
353 | return retval; |
354 | } | |
355 | ||
8440e22e | 356 | static int coroutine_fn free_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
286d5652 | 357 | { |
10b468bd | 358 | int retval = 0; |
84dfb926 AK |
359 | |
360 | if (fidp->fid_type == P9_FID_FILE) { | |
7a462745 AK |
361 | /* If we reclaimed the fd no need to close */ |
362 | if (fidp->fs.fd != -1) { | |
cc720ddb | 363 | retval = v9fs_co_close(pdu, &fidp->fs); |
7a462745 | 364 | } |
84dfb926 | 365 | } else if (fidp->fid_type == P9_FID_DIR) { |
f314ea4e | 366 | if (fidp->fs.dir.stream != NULL) { |
cc720ddb | 367 | retval = v9fs_co_closedir(pdu, &fidp->fs); |
95f65511 | 368 | } |
84dfb926 | 369 | } else if (fidp->fid_type == P9_FID_XATTR) { |
bccacf6c | 370 | retval = v9fs_xattr_fid_clunk(pdu, fidp); |
84dfb926 | 371 | } |
2289be19 | 372 | v9fs_path_free(&fidp->path); |
84dfb926 AK |
373 | g_free(fidp); |
374 | return retval; | |
375 | } | |
376 | ||
8440e22e | 377 | static int coroutine_fn put_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
84dfb926 AK |
378 | { |
379 | BUG_ON(!fidp->ref); | |
380 | fidp->ref--; | |
7a462745 AK |
381 | /* |
382 | * Don't free the fid if it is in reclaim list | |
383 | */ | |
84dfb926 | 384 | if (!fidp->ref && fidp->clunked) { |
e9a0152b AK |
385 | if (fidp->fid == pdu->s->root_fid) { |
386 | /* | |
387 | * if the clunked fid is root fid then we | |
388 | * have unmounted the fs on the client side. | |
389 | * delete the migration blocker. Ideally, this | |
390 | * should be hooked to transport close notification | |
391 | */ | |
392 | if (pdu->s->migration_blocker) { | |
393 | migrate_del_blocker(pdu->s->migration_blocker); | |
394 | error_free(pdu->s->migration_blocker); | |
395 | pdu->s->migration_blocker = NULL; | |
396 | } | |
397 | } | |
a911a182 | 398 | return free_fid(pdu, fidp); |
84dfb926 | 399 | } |
a911a182 | 400 | return 0; |
84dfb926 AK |
401 | } |
402 | ||
ce421a19 | 403 | static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) |
84dfb926 | 404 | { |
286d5652 AL |
405 | V9fsFidState **fidpp, *fidp; |
406 | ||
407 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
408 | if ((*fidpp)->fid == fid) { | |
409 | break; | |
410 | } | |
411 | } | |
286d5652 | 412 | if (*fidpp == NULL) { |
ce421a19 | 413 | return NULL; |
286d5652 | 414 | } |
286d5652 AL |
415 | fidp = *fidpp; |
416 | *fidpp = fidp->next; | |
84dfb926 | 417 | fidp->clunked = 1; |
ce421a19 | 418 | return fidp; |
286d5652 AL |
419 | } |
420 | ||
8440e22e | 421 | void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu) |
7a462745 AK |
422 | { |
423 | int reclaim_count = 0; | |
bccacf6c | 424 | V9fsState *s = pdu->s; |
7a462745 AK |
425 | V9fsFidState *f, *reclaim_list = NULL; |
426 | ||
427 | for (f = s->fid_list; f; f = f->next) { | |
428 | /* | |
429 | * Unlink fids cannot be reclaimed. Check | |
430 | * for them and skip them. Also skip fids | |
431 | * currently being operated on. | |
432 | */ | |
433 | if (f->ref || f->flags & FID_NON_RECLAIMABLE) { | |
434 | continue; | |
435 | } | |
436 | /* | |
437 | * if it is a recently referenced fid | |
438 | * we leave the fid untouched and clear the | |
439 | * reference bit. We come back to it later | |
440 | * in the next iteration. (a simple LRU without | |
441 | * moving list elements around) | |
442 | */ | |
443 | if (f->flags & FID_REFERENCED) { | |
444 | f->flags &= ~FID_REFERENCED; | |
445 | continue; | |
446 | } | |
447 | /* | |
448 | * Add fids to reclaim list. | |
449 | */ | |
450 | if (f->fid_type == P9_FID_FILE) { | |
451 | if (f->fs.fd != -1) { | |
452 | /* | |
453 | * Up the reference count so that | |
454 | * a clunk request won't free this fid | |
455 | */ | |
456 | f->ref++; | |
457 | f->rclm_lst = reclaim_list; | |
458 | reclaim_list = f; | |
459 | f->fs_reclaim.fd = f->fs.fd; | |
460 | f->fs.fd = -1; | |
461 | reclaim_count++; | |
462 | } | |
95f65511 | 463 | } else if (f->fid_type == P9_FID_DIR) { |
f314ea4e | 464 | if (f->fs.dir.stream != NULL) { |
95f65511 AK |
465 | /* |
466 | * Up the reference count so that | |
467 | * a clunk request won't free this fid | |
468 | */ | |
469 | f->ref++; | |
470 | f->rclm_lst = reclaim_list; | |
471 | reclaim_list = f; | |
f314ea4e GK |
472 | f->fs_reclaim.dir.stream = f->fs.dir.stream; |
473 | f->fs.dir.stream = NULL; | |
95f65511 AK |
474 | reclaim_count++; |
475 | } | |
7a462745 AK |
476 | } |
477 | if (reclaim_count >= open_fd_rc) { | |
478 | break; | |
479 | } | |
480 | } | |
481 | /* | |
482 | * Now close the fid in reclaim list. Free them if they | |
483 | * are already clunked. | |
484 | */ | |
485 | while (reclaim_list) { | |
486 | f = reclaim_list; | |
487 | reclaim_list = f->rclm_lst; | |
488 | if (f->fid_type == P9_FID_FILE) { | |
cc720ddb | 489 | v9fs_co_close(pdu, &f->fs_reclaim); |
95f65511 | 490 | } else if (f->fid_type == P9_FID_DIR) { |
cc720ddb | 491 | v9fs_co_closedir(pdu, &f->fs_reclaim); |
7a462745 AK |
492 | } |
493 | f->rclm_lst = NULL; | |
494 | /* | |
495 | * Now drop the fid reference, free it | |
496 | * if clunked. | |
497 | */ | |
bccacf6c | 498 | put_fid(pdu, f); |
7a462745 AK |
499 | } |
500 | } | |
501 | ||
8440e22e | 502 | static int coroutine_fn v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) |
7a462745 AK |
503 | { |
504 | int err; | |
bccacf6c | 505 | V9fsState *s = pdu->s; |
7a462745 AK |
506 | V9fsFidState *fidp, head_fid; |
507 | ||
508 | head_fid.next = s->fid_list; | |
509 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2289be19 AK |
510 | if (fidp->path.size != path->size) { |
511 | continue; | |
512 | } | |
513 | if (!memcmp(fidp->path.data, path->data, path->size)) { | |
7a462745 AK |
514 | /* Mark the fid non reclaimable. */ |
515 | fidp->flags |= FID_NON_RECLAIMABLE; | |
b9cb88b0 AK |
516 | |
517 | /* reopen the file/dir if already closed */ | |
bccacf6c | 518 | err = v9fs_reopen_fid(pdu, fidp); |
b9cb88b0 AK |
519 | if (err < 0) { |
520 | return -1; | |
521 | } | |
522 | /* | |
523 | * Go back to head of fid list because | |
524 | * the list could have got updated when | |
525 | * switched to the worker thread | |
526 | */ | |
527 | if (err == 0) { | |
7a462745 AK |
528 | fidp = &head_fid; |
529 | } | |
530 | } | |
531 | } | |
532 | return 0; | |
533 | } | |
534 | ||
8440e22e | 535 | static void coroutine_fn virtfs_reset(V9fsPDU *pdu) |
b41e2992 DS |
536 | { |
537 | V9fsState *s = pdu->s; | |
538 | V9fsFidState *fidp = NULL; | |
539 | ||
540 | /* Free all fids */ | |
541 | while (s->fid_list) { | |
542 | fidp = s->fid_list; | |
543 | s->fid_list = fidp->next; | |
544 | ||
545 | if (fidp->ref) { | |
546 | fidp->clunked = 1; | |
547 | } else { | |
548 | free_fid(pdu, fidp); | |
549 | } | |
550 | } | |
551 | if (fidp) { | |
552 | /* One or more unclunked fids found... */ | |
553 | error_report("9pfs:%s: One or more uncluncked fids " | |
554 | "found during reset", __func__); | |
555 | } | |
b41e2992 DS |
556 | } |
557 | ||
286d5652 AL |
558 | #define P9_QID_TYPE_DIR 0x80 |
559 | #define P9_QID_TYPE_SYMLINK 0x02 | |
560 | ||
561 | #define P9_STAT_MODE_DIR 0x80000000 | |
562 | #define P9_STAT_MODE_APPEND 0x40000000 | |
563 | #define P9_STAT_MODE_EXCL 0x20000000 | |
564 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
565 | #define P9_STAT_MODE_AUTH 0x08000000 | |
566 | #define P9_STAT_MODE_TMP 0x04000000 | |
567 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
568 | #define P9_STAT_MODE_LINK 0x01000000 | |
569 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
570 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
571 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
572 | #define P9_STAT_MODE_SETUID 0x00080000 | |
573 | #define P9_STAT_MODE_SETGID 0x00040000 | |
574 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
575 | ||
576 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
577 | P9_STAT_MODE_SYMLINK | \ | |
578 | P9_STAT_MODE_LINK | \ | |
579 | P9_STAT_MODE_DEVICE | \ | |
580 | P9_STAT_MODE_NAMED_PIPE | \ | |
581 | P9_STAT_MODE_SOCKET) | |
582 | ||
583 | /* This is the algorithm from ufs in spfs */ | |
584 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
585 | { | |
586 | size_t size; | |
587 | ||
25427ec1 | 588 | memset(&qidp->path, 0, sizeof(qidp->path)); |
286d5652 AL |
589 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
590 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
591 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
592 | qidp->type = 0; | |
593 | if (S_ISDIR(stbuf->st_mode)) { | |
594 | qidp->type |= P9_QID_TYPE_DIR; | |
595 | } | |
596 | if (S_ISLNK(stbuf->st_mode)) { | |
597 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
598 | } | |
599 | } | |
600 | ||
8440e22e GK |
601 | static int coroutine_fn fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, |
602 | V9fsQID *qidp) | |
286d5652 AL |
603 | { |
604 | struct stat stbuf; | |
605 | int err; | |
606 | ||
bccacf6c | 607 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
8c158561 | 608 | if (err < 0) { |
286d5652 AL |
609 | return err; |
610 | } | |
286d5652 AL |
611 | stat_to_qid(&stbuf, qidp); |
612 | return 0; | |
613 | } | |
614 | ||
4b311c5f | 615 | V9fsPDU *pdu_alloc(V9fsState *s) |
9f107513 AL |
616 | { |
617 | V9fsPDU *pdu = NULL; | |
618 | ||
619 | if (!QLIST_EMPTY(&s->free_list)) { | |
bccacf6c AK |
620 | pdu = QLIST_FIRST(&s->free_list); |
621 | QLIST_REMOVE(pdu, next); | |
622 | QLIST_INSERT_HEAD(&s->active_list, pdu, next); | |
9f107513 AL |
623 | } |
624 | return pdu; | |
625 | } | |
626 | ||
4b311c5f | 627 | void pdu_free(V9fsPDU *pdu) |
9f107513 | 628 | { |
6868a420 GK |
629 | V9fsState *s = pdu->s; |
630 | /* | |
631 | * Cancelled pdu are added back to the freelist | |
632 | * by flush request . | |
633 | */ | |
634 | if (!pdu->cancelled) { | |
635 | QLIST_REMOVE(pdu, next); | |
636 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
9f107513 AL |
637 | } |
638 | } | |
639 | ||
ddca7f86 MK |
640 | /* |
641 | * We don't do error checking for pdu_marshal/unmarshal here | |
642 | * because we always expect to have enough space to encode | |
643 | * error details | |
644 | */ | |
8440e22e | 645 | static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len) |
405a549a AL |
646 | { |
647 | int8_t id = pdu->id + 1; /* Response */ | |
ad38ce9e | 648 | V9fsState *s = pdu->s; |
405a549a AL |
649 | |
650 | if (len < 0) { | |
405a549a | 651 | int err = -len; |
8f4d1ca5 | 652 | len = 7; |
405a549a | 653 | |
8f4d1ca5 AB |
654 | if (s->proto_version != V9FS_PROTO_2000L) { |
655 | V9fsString str; | |
656 | ||
657 | str.data = strerror(err); | |
658 | str.size = strlen(str.data); | |
659 | ||
660 | len += pdu_marshal(pdu, len, "s", &str); | |
661 | id = P9_RERROR; | |
662 | } | |
405a549a | 663 | |
cf03eb2c | 664 | len += pdu_marshal(pdu, len, "d", err); |
405a549a | 665 | |
8f4d1ca5 AB |
666 | if (s->proto_version == V9FS_PROTO_2000L) { |
667 | id = P9_RLERROR; | |
668 | } | |
7999f7e1 | 669 | trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ |
405a549a AL |
670 | } |
671 | ||
672 | /* fill out the header */ | |
673 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
674 | ||
675 | /* keep these in sync */ | |
676 | pdu->size = len; | |
677 | pdu->id = id; | |
678 | ||
f657b17a | 679 | pdu_push_and_notify(pdu); |
405a549a | 680 | |
bccacf6c AK |
681 | /* Now wakeup anybody waiting in flush for this request */ |
682 | qemu_co_queue_next(&pdu->complete); | |
683 | ||
dc295f83 | 684 | pdu_free(pdu); |
405a549a AL |
685 | } |
686 | ||
bb9e3216 AL |
687 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
688 | { | |
689 | mode_t ret; | |
690 | ||
691 | ret = mode & 0777; | |
692 | if (mode & P9_STAT_MODE_DIR) { | |
693 | ret |= S_IFDIR; | |
694 | } | |
695 | ||
cf03eb2c AB |
696 | if (mode & P9_STAT_MODE_SYMLINK) { |
697 | ret |= S_IFLNK; | |
698 | } | |
699 | if (mode & P9_STAT_MODE_SOCKET) { | |
700 | ret |= S_IFSOCK; | |
701 | } | |
702 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
703 | ret |= S_IFIFO; | |
704 | } | |
705 | if (mode & P9_STAT_MODE_DEVICE) { | |
c7e587b7 | 706 | if (extension->size && extension->data[0] == 'c') { |
cf03eb2c AB |
707 | ret |= S_IFCHR; |
708 | } else { | |
709 | ret |= S_IFBLK; | |
bb9e3216 AL |
710 | } |
711 | } | |
712 | ||
713 | if (!(ret&~0777)) { | |
714 | ret |= S_IFREG; | |
715 | } | |
716 | ||
717 | if (mode & P9_STAT_MODE_SETUID) { | |
718 | ret |= S_ISUID; | |
719 | } | |
720 | if (mode & P9_STAT_MODE_SETGID) { | |
721 | ret |= S_ISGID; | |
722 | } | |
723 | if (mode & P9_STAT_MODE_SETVTX) { | |
724 | ret |= S_ISVTX; | |
725 | } | |
726 | ||
727 | return ret; | |
728 | } | |
729 | ||
730 | static int donttouch_stat(V9fsStat *stat) | |
731 | { | |
732 | if (stat->type == -1 && | |
733 | stat->dev == -1 && | |
734 | stat->qid.type == -1 && | |
735 | stat->qid.version == -1 && | |
736 | stat->qid.path == -1 && | |
737 | stat->mode == -1 && | |
738 | stat->atime == -1 && | |
739 | stat->mtime == -1 && | |
740 | stat->length == -1 && | |
741 | !stat->name.size && | |
742 | !stat->uid.size && | |
743 | !stat->gid.size && | |
744 | !stat->muid.size && | |
745 | stat->n_uid == -1 && | |
746 | stat->n_gid == -1 && | |
747 | stat->n_muid == -1) { | |
748 | return 1; | |
749 | } | |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
ddca7f86 MK |
754 | static void v9fs_stat_init(V9fsStat *stat) |
755 | { | |
756 | v9fs_string_init(&stat->name); | |
757 | v9fs_string_init(&stat->uid); | |
758 | v9fs_string_init(&stat->gid); | |
759 | v9fs_string_init(&stat->muid); | |
760 | v9fs_string_init(&stat->extension); | |
761 | } | |
762 | ||
bb9e3216 AL |
763 | static void v9fs_stat_free(V9fsStat *stat) |
764 | { | |
765 | v9fs_string_free(&stat->name); | |
766 | v9fs_string_free(&stat->uid); | |
767 | v9fs_string_free(&stat->gid); | |
768 | v9fs_string_free(&stat->muid); | |
769 | v9fs_string_free(&stat->extension); | |
770 | } | |
771 | ||
772 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
773 | { | |
774 | uint32_t mode; | |
775 | ||
776 | mode = stbuf->st_mode & 0777; | |
777 | if (S_ISDIR(stbuf->st_mode)) { | |
778 | mode |= P9_STAT_MODE_DIR; | |
779 | } | |
780 | ||
cf03eb2c AB |
781 | if (S_ISLNK(stbuf->st_mode)) { |
782 | mode |= P9_STAT_MODE_SYMLINK; | |
783 | } | |
bb9e3216 | 784 | |
cf03eb2c AB |
785 | if (S_ISSOCK(stbuf->st_mode)) { |
786 | mode |= P9_STAT_MODE_SOCKET; | |
787 | } | |
bb9e3216 | 788 | |
cf03eb2c AB |
789 | if (S_ISFIFO(stbuf->st_mode)) { |
790 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
791 | } | |
bb9e3216 | 792 | |
cf03eb2c AB |
793 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { |
794 | mode |= P9_STAT_MODE_DEVICE; | |
795 | } | |
bb9e3216 | 796 | |
cf03eb2c AB |
797 | if (stbuf->st_mode & S_ISUID) { |
798 | mode |= P9_STAT_MODE_SETUID; | |
799 | } | |
bb9e3216 | 800 | |
cf03eb2c AB |
801 | if (stbuf->st_mode & S_ISGID) { |
802 | mode |= P9_STAT_MODE_SETGID; | |
803 | } | |
bb9e3216 | 804 | |
cf03eb2c AB |
805 | if (stbuf->st_mode & S_ISVTX) { |
806 | mode |= P9_STAT_MODE_SETVTX; | |
bb9e3216 AL |
807 | } |
808 | ||
809 | return mode; | |
810 | } | |
811 | ||
8440e22e GK |
812 | static int coroutine_fn stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name, |
813 | const struct stat *stbuf, | |
814 | V9fsStat *v9stat) | |
bb9e3216 AL |
815 | { |
816 | int err; | |
817 | const char *str; | |
818 | ||
819 | memset(v9stat, 0, sizeof(*v9stat)); | |
820 | ||
821 | stat_to_qid(stbuf, &v9stat->qid); | |
822 | v9stat->mode = stat_to_v9mode(stbuf); | |
823 | v9stat->atime = stbuf->st_atime; | |
824 | v9stat->mtime = stbuf->st_mtime; | |
825 | v9stat->length = stbuf->st_size; | |
826 | ||
abdf0086 GK |
827 | v9fs_string_free(&v9stat->uid); |
828 | v9fs_string_free(&v9stat->gid); | |
829 | v9fs_string_free(&v9stat->muid); | |
bb9e3216 | 830 | |
cf03eb2c AB |
831 | v9stat->n_uid = stbuf->st_uid; |
832 | v9stat->n_gid = stbuf->st_gid; | |
833 | v9stat->n_muid = 0; | |
bb9e3216 | 834 | |
abdf0086 | 835 | v9fs_string_free(&v9stat->extension); |
bb9e3216 | 836 | |
cf03eb2c | 837 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { |
bccacf6c | 838 | err = v9fs_co_readlink(pdu, name, &v9stat->extension); |
7a5ca31e | 839 | if (err < 0) { |
cf03eb2c | 840 | return err; |
bb9e3216 | 841 | } |
cf03eb2c AB |
842 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
843 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
844 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
845 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
846 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
c9ba47dc SW |
847 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
848 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); | |
bb9e3216 AL |
849 | } |
850 | ||
851 | str = strrchr(name->data, '/'); | |
852 | if (str) { | |
853 | str += 1; | |
854 | } else { | |
855 | str = name->data; | |
856 | } | |
857 | ||
858 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
859 | ||
860 | v9stat->size = 61 + | |
861 | v9fs_string_size(&v9stat->name) + | |
862 | v9fs_string_size(&v9stat->uid) + | |
863 | v9fs_string_size(&v9stat->gid) + | |
864 | v9fs_string_size(&v9stat->muid) + | |
865 | v9fs_string_size(&v9stat->extension); | |
866 | return 0; | |
867 | } | |
868 | ||
00ede4c2 SK |
869 | #define P9_STATS_MODE 0x00000001ULL |
870 | #define P9_STATS_NLINK 0x00000002ULL | |
871 | #define P9_STATS_UID 0x00000004ULL | |
872 | #define P9_STATS_GID 0x00000008ULL | |
873 | #define P9_STATS_RDEV 0x00000010ULL | |
874 | #define P9_STATS_ATIME 0x00000020ULL | |
875 | #define P9_STATS_MTIME 0x00000040ULL | |
876 | #define P9_STATS_CTIME 0x00000080ULL | |
877 | #define P9_STATS_INO 0x00000100ULL | |
878 | #define P9_STATS_SIZE 0x00000200ULL | |
879 | #define P9_STATS_BLOCKS 0x00000400ULL | |
880 | ||
881 | #define P9_STATS_BTIME 0x00000800ULL | |
882 | #define P9_STATS_GEN 0x00001000ULL | |
883 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
884 | ||
885 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
886 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
887 | ||
888 | ||
889 | static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, | |
8db21ce7 | 890 | V9fsStatDotl *v9lstat) |
00ede4c2 SK |
891 | { |
892 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
893 | ||
894 | v9lstat->st_mode = stbuf->st_mode; | |
895 | v9lstat->st_nlink = stbuf->st_nlink; | |
896 | v9lstat->st_uid = stbuf->st_uid; | |
897 | v9lstat->st_gid = stbuf->st_gid; | |
898 | v9lstat->st_rdev = stbuf->st_rdev; | |
899 | v9lstat->st_size = stbuf->st_size; | |
900 | v9lstat->st_blksize = stbuf->st_blksize; | |
901 | v9lstat->st_blocks = stbuf->st_blocks; | |
902 | v9lstat->st_atime_sec = stbuf->st_atime; | |
903 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
904 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
905 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
906 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
907 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
908 | /* Currently we only support BASIC fields in stat */ | |
909 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
910 | ||
911 | stat_to_qid(stbuf, &v9lstat->qid); | |
912 | } | |
913 | ||
1f5a89bf AL |
914 | static void print_sg(struct iovec *sg, int cnt) |
915 | { | |
916 | int i; | |
917 | ||
918 | printf("sg[%d]: {", cnt); | |
919 | for (i = 0; i < cnt; i++) { | |
920 | if (i) { | |
921 | printf(", "); | |
922 | } | |
923 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
924 | } | |
925 | printf("}\n"); | |
926 | } | |
927 | ||
2289be19 AK |
928 | /* Will call this only for path name based fid */ |
929 | static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) | |
8cf89e00 | 930 | { |
2289be19 AK |
931 | V9fsPath str; |
932 | v9fs_path_init(&str); | |
933 | v9fs_path_copy(&str, dst); | |
e3e83f2e | 934 | v9fs_path_sprintf(dst, "%s%s", src->data, str.data + len); |
2289be19 | 935 | v9fs_path_free(&str); |
8cf89e00 AL |
936 | } |
937 | ||
2c74c2cb MK |
938 | static inline bool is_ro_export(FsContext *ctx) |
939 | { | |
940 | return ctx->export_flags & V9FS_RDONLY; | |
941 | } | |
942 | ||
8440e22e | 943 | static void coroutine_fn v9fs_version(void *opaque) |
9f107513 | 944 | { |
ddca7f86 | 945 | ssize_t err; |
ff06030f VJ |
946 | V9fsPDU *pdu = opaque; |
947 | V9fsState *s = pdu->s; | |
92c1ad03 AL |
948 | V9fsString version; |
949 | size_t offset = 7; | |
950 | ||
ddca7f86 MK |
951 | v9fs_string_init(&version); |
952 | err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); | |
953 | if (err < 0) { | |
954 | offset = err; | |
955 | goto out; | |
956 | } | |
c572f23a | 957 | trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); |
92c1ad03 | 958 | |
b41e2992 DS |
959 | virtfs_reset(pdu); |
960 | ||
84151514 MK |
961 | if (!strcmp(version.data, "9P2000.u")) { |
962 | s->proto_version = V9FS_PROTO_2000U; | |
963 | } else if (!strcmp(version.data, "9P2000.L")) { | |
964 | s->proto_version = V9FS_PROTO_2000L; | |
965 | } else { | |
92c1ad03 | 966 | v9fs_string_sprintf(&version, "unknown"); |
9f107513 | 967 | } |
92c1ad03 | 968 | |
ddca7f86 MK |
969 | err = pdu_marshal(pdu, offset, "ds", s->msize, &version); |
970 | if (err < 0) { | |
971 | offset = err; | |
972 | goto out; | |
973 | } | |
974 | offset += err; | |
c572f23a | 975 | trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); |
ddca7f86 | 976 | out: |
dc295f83 | 977 | pdu_complete(pdu, offset); |
92c1ad03 | 978 | v9fs_string_free(&version); |
9f107513 AL |
979 | } |
980 | ||
8440e22e | 981 | static void coroutine_fn v9fs_attach(void *opaque) |
9f107513 | 982 | { |
ff06030f VJ |
983 | V9fsPDU *pdu = opaque; |
984 | V9fsState *s = pdu->s; | |
955efc47 AL |
985 | int32_t fid, afid, n_uname; |
986 | V9fsString uname, aname; | |
987 | V9fsFidState *fidp; | |
955efc47 | 988 | size_t offset = 7; |
8c158561 | 989 | V9fsQID qid; |
955efc47 AL |
990 | ssize_t err; |
991 | ||
ddca7f86 MK |
992 | v9fs_string_init(&uname); |
993 | v9fs_string_init(&aname); | |
994 | err = pdu_unmarshal(pdu, offset, "ddssd", &fid, | |
995 | &afid, &uname, &aname, &n_uname); | |
996 | if (err < 0) { | |
997 | goto out_nofid; | |
998 | } | |
c572f23a | 999 | trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); |
955efc47 AL |
1000 | |
1001 | fidp = alloc_fid(s, fid); | |
1002 | if (fidp == NULL) { | |
1003 | err = -EINVAL; | |
84dfb926 | 1004 | goto out_nofid; |
9f107513 | 1005 | } |
955efc47 | 1006 | fidp->uid = n_uname; |
bccacf6c | 1007 | err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); |
2289be19 AK |
1008 | if (err < 0) { |
1009 | err = -EINVAL; | |
1010 | clunk_fid(s, fid); | |
1011 | goto out; | |
1012 | } | |
bccacf6c | 1013 | err = fid_to_qid(pdu, fidp, &qid); |
8c158561 | 1014 | if (err < 0) { |
955efc47 | 1015 | err = -EINVAL; |
84dfb926 | 1016 | clunk_fid(s, fid); |
955efc47 AL |
1017 | goto out; |
1018 | } | |
ddca7f86 MK |
1019 | err = pdu_marshal(pdu, offset, "Q", &qid); |
1020 | if (err < 0) { | |
1021 | clunk_fid(s, fid); | |
1022 | goto out; | |
1023 | } | |
1024 | err += offset; | |
56f101ec | 1025 | memcpy(&s->root_qid, &qid, sizeof(qid)); |
7999f7e1 AK |
1026 | trace_v9fs_attach_return(pdu->tag, pdu->id, |
1027 | qid.type, qid.version, qid.path); | |
4cdc0789 AK |
1028 | /* |
1029 | * disable migration if we haven't done already. | |
1030 | * attach could get called multiple times for the same export. | |
1031 | */ | |
1032 | if (!s->migration_blocker) { | |
1033 | s->root_fid = fid; | |
f231b88d CR |
1034 | error_setg(&s->migration_blocker, |
1035 | "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", | |
1036 | s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); | |
4cdc0789 AK |
1037 | migrate_add_blocker(s->migration_blocker); |
1038 | } | |
955efc47 | 1039 | out: |
bccacf6c | 1040 | put_fid(pdu, fidp); |
84dfb926 | 1041 | out_nofid: |
dc295f83 | 1042 | pdu_complete(pdu, err); |
955efc47 AL |
1043 | v9fs_string_free(&uname); |
1044 | v9fs_string_free(&aname); | |
9f107513 AL |
1045 | } |
1046 | ||
8440e22e | 1047 | static void coroutine_fn v9fs_stat(void *opaque) |
9f107513 | 1048 | { |
4da7d3fa | 1049 | int32_t fid; |
d8e0c29e | 1050 | V9fsStat v9stat; |
4da7d3fa | 1051 | ssize_t err = 0; |
d8e0c29e AK |
1052 | size_t offset = 7; |
1053 | struct stat stbuf; | |
1054 | V9fsFidState *fidp; | |
1055 | V9fsPDU *pdu = opaque; | |
4da7d3fa | 1056 | |
ddca7f86 MK |
1057 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
1058 | if (err < 0) { | |
1059 | goto out_nofid; | |
1060 | } | |
c572f23a | 1061 | trace_v9fs_stat(pdu->tag, pdu->id, fid); |
84dfb926 | 1062 | |
bccacf6c | 1063 | fidp = get_fid(pdu, fid); |
d8e0c29e | 1064 | if (fidp == NULL) { |
4da7d3fa | 1065 | err = -ENOENT; |
84dfb926 | 1066 | goto out_nofid; |
9f107513 | 1067 | } |
bccacf6c | 1068 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
d8e0c29e AK |
1069 | if (err < 0) { |
1070 | goto out; | |
1071 | } | |
bccacf6c | 1072 | err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat); |
d8e0c29e AK |
1073 | if (err < 0) { |
1074 | goto out; | |
1075 | } | |
ddca7f86 MK |
1076 | err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); |
1077 | if (err < 0) { | |
1078 | v9fs_stat_free(&v9stat); | |
1079 | goto out; | |
1080 | } | |
7999f7e1 AK |
1081 | trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, |
1082 | v9stat.atime, v9stat.mtime, v9stat.length); | |
ddca7f86 | 1083 | err += offset; |
d8e0c29e | 1084 | v9fs_stat_free(&v9stat); |
4da7d3fa | 1085 | out: |
bccacf6c | 1086 | put_fid(pdu, fidp); |
84dfb926 | 1087 | out_nofid: |
dc295f83 | 1088 | pdu_complete(pdu, err); |
9f107513 AL |
1089 | } |
1090 | ||
8440e22e | 1091 | static void coroutine_fn v9fs_getattr(void *opaque) |
00ede4c2 SK |
1092 | { |
1093 | int32_t fid; | |
8db21ce7 AK |
1094 | size_t offset = 7; |
1095 | ssize_t retval = 0; | |
1096 | struct stat stbuf; | |
00ede4c2 SK |
1097 | V9fsFidState *fidp; |
1098 | uint64_t request_mask; | |
8db21ce7 AK |
1099 | V9fsStatDotl v9stat_dotl; |
1100 | V9fsPDU *pdu = opaque; | |
1101 | V9fsState *s = pdu->s; | |
00ede4c2 | 1102 | |
ddca7f86 MK |
1103 | retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); |
1104 | if (retval < 0) { | |
1105 | goto out_nofid; | |
1106 | } | |
c572f23a | 1107 | trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); |
00ede4c2 | 1108 | |
bccacf6c | 1109 | fidp = get_fid(pdu, fid); |
00ede4c2 | 1110 | if (fidp == NULL) { |
8db21ce7 | 1111 | retval = -ENOENT; |
84dfb926 | 1112 | goto out_nofid; |
00ede4c2 | 1113 | } |
8db21ce7 AK |
1114 | /* |
1115 | * Currently we only support BASIC fields in stat, so there is no | |
00ede4c2 SK |
1116 | * need to look at request_mask. |
1117 | */ | |
bccacf6c | 1118 | retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
8db21ce7 AK |
1119 | if (retval < 0) { |
1120 | goto out; | |
1121 | } | |
1122 | stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); | |
e06a765e HPB |
1123 | |
1124 | /* fill st_gen if requested and supported by underlying fs */ | |
1125 | if (request_mask & P9_STATS_GEN) { | |
1126 | retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); | |
f8b7ee38 KS |
1127 | switch (retval) { |
1128 | case 0: | |
1129 | /* we have valid st_gen: update result mask */ | |
1130 | v9stat_dotl.st_result_mask |= P9_STATS_GEN; | |
1131 | break; | |
1132 | case -EINTR: | |
1133 | /* request cancelled, e.g. by Tflush */ | |
e06a765e | 1134 | goto out; |
f8b7ee38 KS |
1135 | default: |
1136 | /* failed to get st_gen: not fatal, ignore */ | |
1137 | break; | |
e06a765e | 1138 | } |
e06a765e | 1139 | } |
ddca7f86 MK |
1140 | retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); |
1141 | if (retval < 0) { | |
1142 | goto out; | |
1143 | } | |
1144 | retval += offset; | |
c572f23a HPB |
1145 | trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, |
1146 | v9stat_dotl.st_mode, v9stat_dotl.st_uid, | |
1147 | v9stat_dotl.st_gid); | |
7999f7e1 AK |
1148 | out: |
1149 | put_fid(pdu, fidp); | |
1150 | out_nofid: | |
dc295f83 | 1151 | pdu_complete(pdu, retval); |
00ede4c2 SK |
1152 | } |
1153 | ||
e4027caf AK |
1154 | /* Attribute flags */ |
1155 | #define P9_ATTR_MODE (1 << 0) | |
1156 | #define P9_ATTR_UID (1 << 1) | |
1157 | #define P9_ATTR_GID (1 << 2) | |
1158 | #define P9_ATTR_SIZE (1 << 3) | |
1159 | #define P9_ATTR_ATIME (1 << 4) | |
1160 | #define P9_ATTR_MTIME (1 << 5) | |
1161 | #define P9_ATTR_CTIME (1 << 6) | |
1162 | #define P9_ATTR_ATIME_SET (1 << 7) | |
1163 | #define P9_ATTR_MTIME_SET (1 << 8) | |
1164 | ||
1165 | #define P9_ATTR_MASK 127 | |
c79ce737 | 1166 | |
8440e22e | 1167 | static void coroutine_fn v9fs_setattr(void *opaque) |
c79ce737 | 1168 | { |
65c05f9a AK |
1169 | int err = 0; |
1170 | int32_t fid; | |
1171 | V9fsFidState *fidp; | |
1172 | size_t offset = 7; | |
1173 | V9fsIattr v9iattr; | |
1174 | V9fsPDU *pdu = opaque; | |
c79ce737 | 1175 | |
ddca7f86 MK |
1176 | err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); |
1177 | if (err < 0) { | |
1178 | goto out_nofid; | |
1179 | } | |
c79ce737 | 1180 | |
bccacf6c | 1181 | fidp = get_fid(pdu, fid); |
65c05f9a AK |
1182 | if (fidp == NULL) { |
1183 | err = -EINVAL; | |
84dfb926 | 1184 | goto out_nofid; |
c79ce737 | 1185 | } |
e4027caf | 1186 | if (v9iattr.valid & P9_ATTR_MODE) { |
bccacf6c | 1187 | err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); |
65c05f9a AK |
1188 | if (err < 0) { |
1189 | goto out; | |
c79ce737 | 1190 | } |
c79ce737 | 1191 | } |
e4027caf | 1192 | if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { |
c79ce737 | 1193 | struct timespec times[2]; |
e4027caf AK |
1194 | if (v9iattr.valid & P9_ATTR_ATIME) { |
1195 | if (v9iattr.valid & P9_ATTR_ATIME_SET) { | |
65c05f9a AK |
1196 | times[0].tv_sec = v9iattr.atime_sec; |
1197 | times[0].tv_nsec = v9iattr.atime_nsec; | |
c79ce737 SK |
1198 | } else { |
1199 | times[0].tv_nsec = UTIME_NOW; | |
1200 | } | |
1201 | } else { | |
1202 | times[0].tv_nsec = UTIME_OMIT; | |
1203 | } | |
e4027caf AK |
1204 | if (v9iattr.valid & P9_ATTR_MTIME) { |
1205 | if (v9iattr.valid & P9_ATTR_MTIME_SET) { | |
65c05f9a AK |
1206 | times[1].tv_sec = v9iattr.mtime_sec; |
1207 | times[1].tv_nsec = v9iattr.mtime_nsec; | |
c79ce737 SK |
1208 | } else { |
1209 | times[1].tv_nsec = UTIME_NOW; | |
1210 | } | |
1211 | } else { | |
1212 | times[1].tv_nsec = UTIME_OMIT; | |
1213 | } | |
bccacf6c | 1214 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
65c05f9a AK |
1215 | if (err < 0) { |
1216 | goto out; | |
1217 | } | |
c79ce737 | 1218 | } |
65c05f9a AK |
1219 | /* |
1220 | * If the only valid entry in iattr is ctime we can call | |
1221 | * chown(-1,-1) to update the ctime of the file | |
1222 | */ | |
e4027caf AK |
1223 | if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || |
1224 | ((v9iattr.valid & P9_ATTR_CTIME) | |
1225 | && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { | |
1226 | if (!(v9iattr.valid & P9_ATTR_UID)) { | |
65c05f9a AK |
1227 | v9iattr.uid = -1; |
1228 | } | |
e4027caf | 1229 | if (!(v9iattr.valid & P9_ATTR_GID)) { |
65c05f9a AK |
1230 | v9iattr.gid = -1; |
1231 | } | |
bccacf6c | 1232 | err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, |
65c05f9a AK |
1233 | v9iattr.gid); |
1234 | if (err < 0) { | |
1235 | goto out; | |
1236 | } | |
c79ce737 | 1237 | } |
e4027caf | 1238 | if (v9iattr.valid & (P9_ATTR_SIZE)) { |
bccacf6c | 1239 | err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); |
65c05f9a AK |
1240 | if (err < 0) { |
1241 | goto out; | |
1242 | } | |
c79ce737 | 1243 | } |
65c05f9a | 1244 | err = offset; |
c79ce737 | 1245 | out: |
bccacf6c | 1246 | put_fid(pdu, fidp); |
84dfb926 | 1247 | out_nofid: |
dc295f83 | 1248 | pdu_complete(pdu, err); |
c79ce737 SK |
1249 | } |
1250 | ||
3cc19c0c | 1251 | static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) |
ff5e54c9 AL |
1252 | { |
1253 | int i; | |
ddca7f86 | 1254 | ssize_t err; |
3cc19c0c | 1255 | size_t offset = 7; |
ddca7f86 MK |
1256 | |
1257 | err = pdu_marshal(pdu, offset, "w", nwnames); | |
1258 | if (err < 0) { | |
1259 | return err; | |
1260 | } | |
1261 | offset += err; | |
3cc19c0c | 1262 | for (i = 0; i < nwnames; i++) { |
ddca7f86 MK |
1263 | err = pdu_marshal(pdu, offset, "Q", &qids[i]); |
1264 | if (err < 0) { | |
1265 | return err; | |
1266 | } | |
1267 | offset += err; | |
ff5e54c9 | 1268 | } |
3cc19c0c | 1269 | return offset; |
ff5e54c9 AL |
1270 | } |
1271 | ||
fff39a7a GK |
1272 | static bool name_is_illegal(const char *name) |
1273 | { | |
1274 | return !*name || strchr(name, '/') != NULL; | |
1275 | } | |
1276 | ||
56f101ec GK |
1277 | static bool not_same_qid(const V9fsQID *qid1, const V9fsQID *qid2) |
1278 | { | |
1279 | return | |
1280 | qid1->type != qid2->type || | |
1281 | qid1->version != qid2->version || | |
1282 | qid1->path != qid2->path; | |
1283 | } | |
1284 | ||
8440e22e | 1285 | static void coroutine_fn v9fs_walk(void *opaque) |
9f107513 | 1286 | { |
3cc19c0c AK |
1287 | int name_idx; |
1288 | V9fsQID *qids = NULL; | |
1289 | int i, err = 0; | |
2289be19 | 1290 | V9fsPath dpath, path; |
3cc19c0c AK |
1291 | uint16_t nwnames; |
1292 | struct stat stbuf; | |
1293 | size_t offset = 7; | |
1294 | int32_t fid, newfid; | |
1295 | V9fsString *wnames = NULL; | |
1296 | V9fsFidState *fidp; | |
3a93113a | 1297 | V9fsFidState *newfidp = NULL; |
ff06030f VJ |
1298 | V9fsPDU *pdu = opaque; |
1299 | V9fsState *s = pdu->s; | |
56f101ec | 1300 | V9fsQID qid; |
ff5e54c9 | 1301 | |
ddca7f86 MK |
1302 | err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); |
1303 | if (err < 0) { | |
dc295f83 | 1304 | pdu_complete(pdu, err); |
ddca7f86 MK |
1305 | return ; |
1306 | } | |
1307 | offset += err; | |
ff5e54c9 | 1308 | |
c572f23a HPB |
1309 | trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); |
1310 | ||
3cc19c0c AK |
1311 | if (nwnames && nwnames <= P9_MAXWELEM) { |
1312 | wnames = g_malloc0(sizeof(wnames[0]) * nwnames); | |
1313 | qids = g_malloc0(sizeof(qids[0]) * nwnames); | |
1314 | for (i = 0; i < nwnames; i++) { | |
ddca7f86 MK |
1315 | err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); |
1316 | if (err < 0) { | |
1317 | goto out_nofid; | |
1318 | } | |
fff39a7a GK |
1319 | if (name_is_illegal(wnames[i].data)) { |
1320 | err = -ENOENT; | |
1321 | goto out_nofid; | |
1322 | } | |
ddca7f86 | 1323 | offset += err; |
ff5e54c9 | 1324 | } |
3cc19c0c | 1325 | } else if (nwnames > P9_MAXWELEM) { |
4f8dee2d | 1326 | err = -EINVAL; |
84dfb926 | 1327 | goto out_nofid; |
ff5e54c9 | 1328 | } |
bccacf6c | 1329 | fidp = get_fid(pdu, fid); |
3cc19c0c | 1330 | if (fidp == NULL) { |
ff5e54c9 | 1331 | err = -ENOENT; |
84dfb926 | 1332 | goto out_nofid; |
ff5e54c9 | 1333 | } |
56f101ec | 1334 | |
13fd08e6 GK |
1335 | v9fs_path_init(&dpath); |
1336 | v9fs_path_init(&path); | |
1337 | ||
56f101ec GK |
1338 | err = fid_to_qid(pdu, fidp, &qid); |
1339 | if (err < 0) { | |
1340 | goto out; | |
1341 | } | |
1342 | ||
2289be19 AK |
1343 | /* |
1344 | * Both dpath and path initially poin to fidp. | |
1345 | * Needed to handle request with nwnames == 0 | |
1346 | */ | |
1347 | v9fs_path_copy(&dpath, &fidp->path); | |
1348 | v9fs_path_copy(&path, &fidp->path); | |
1349 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
56f101ec GK |
1350 | if (not_same_qid(&pdu->s->root_qid, &qid) || |
1351 | strcmp("..", wnames[name_idx].data)) { | |
1352 | err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, | |
1353 | &path); | |
1354 | if (err < 0) { | |
1355 | goto out; | |
1356 | } | |
1357 | ||
1358 | err = v9fs_co_lstat(pdu, &path, &stbuf); | |
1359 | if (err < 0) { | |
1360 | goto out; | |
1361 | } | |
1362 | stat_to_qid(&stbuf, &qid); | |
1363 | v9fs_path_copy(&dpath, &path); | |
2289be19 | 1364 | } |
56f101ec | 1365 | memcpy(&qids[name_idx], &qid, sizeof(qid)); |
2289be19 | 1366 | } |
ff5e54c9 | 1367 | if (fid == newfid) { |
3cc19c0c | 1368 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
2289be19 | 1369 | v9fs_path_copy(&fidp->path, &path); |
ff5e54c9 | 1370 | } else { |
3cc19c0c AK |
1371 | newfidp = alloc_fid(s, newfid); |
1372 | if (newfidp == NULL) { | |
ff5e54c9 AL |
1373 | err = -EINVAL; |
1374 | goto out; | |
1375 | } | |
3cc19c0c | 1376 | newfidp->uid = fidp->uid; |
2289be19 | 1377 | v9fs_path_copy(&newfidp->path, &path); |
9f107513 | 1378 | } |
3cc19c0c | 1379 | err = v9fs_walk_marshal(pdu, nwnames, qids); |
7999f7e1 | 1380 | trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); |
ff5e54c9 | 1381 | out: |
bccacf6c | 1382 | put_fid(pdu, fidp); |
84dfb926 | 1383 | if (newfidp) { |
bccacf6c | 1384 | put_fid(pdu, newfidp); |
84dfb926 | 1385 | } |
2289be19 AK |
1386 | v9fs_path_free(&dpath); |
1387 | v9fs_path_free(&path); | |
84dfb926 | 1388 | out_nofid: |
dc295f83 | 1389 | pdu_complete(pdu, err); |
3cc19c0c AK |
1390 | if (nwnames && nwnames <= P9_MAXWELEM) { |
1391 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
1392 | v9fs_string_free(&wnames[name_idx]); | |
1393 | } | |
1394 | g_free(wnames); | |
1395 | g_free(qids); | |
1396 | } | |
9f107513 AL |
1397 | } |
1398 | ||
8440e22e | 1399 | static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) |
5e94c103 MK |
1400 | { |
1401 | struct statfs stbuf; | |
1402 | int32_t iounit = 0; | |
bccacf6c | 1403 | V9fsState *s = pdu->s; |
5e94c103 MK |
1404 | |
1405 | /* | |
1406 | * iounit should be multiples of f_bsize (host filesystem block size | |
1407 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1408 | */ | |
bccacf6c | 1409 | if (!v9fs_co_statfs(pdu, path, &stbuf)) { |
5e94c103 MK |
1410 | iounit = stbuf.f_bsize; |
1411 | iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; | |
1412 | } | |
5e94c103 MK |
1413 | if (!iounit) { |
1414 | iounit = s->msize - P9_IOHDRSZ; | |
1415 | } | |
1416 | return iounit; | |
1417 | } | |
1418 | ||
8440e22e | 1419 | static void coroutine_fn v9fs_open(void *opaque) |
5e94c103 | 1420 | { |
857bc158 | 1421 | int flags; |
857bc158 AK |
1422 | int32_t fid; |
1423 | int32_t mode; | |
1424 | V9fsQID qid; | |
7999f7e1 | 1425 | int iounit = 0; |
857bc158 AK |
1426 | ssize_t err = 0; |
1427 | size_t offset = 7; | |
1428 | struct stat stbuf; | |
1429 | V9fsFidState *fidp; | |
1430 | V9fsPDU *pdu = opaque; | |
1431 | V9fsState *s = pdu->s; | |
5e94c103 | 1432 | |
857bc158 | 1433 | if (s->proto_version == V9FS_PROTO_2000L) { |
ddca7f86 | 1434 | err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); |
857bc158 | 1435 | } else { |
67d6fa53 BH |
1436 | uint8_t modebyte; |
1437 | err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); | |
1438 | mode = modebyte; | |
ddca7f86 MK |
1439 | } |
1440 | if (err < 0) { | |
1441 | goto out_nofid; | |
857bc158 | 1442 | } |
c572f23a HPB |
1443 | trace_v9fs_open(pdu->tag, pdu->id, fid, mode); |
1444 | ||
bccacf6c | 1445 | fidp = get_fid(pdu, fid); |
857bc158 AK |
1446 | if (fidp == NULL) { |
1447 | err = -ENOENT; | |
84dfb926 | 1448 | goto out_nofid; |
a6568fe2 | 1449 | } |
857bc158 | 1450 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
a6568fe2 | 1451 | |
bccacf6c | 1452 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
857bc158 | 1453 | if (err < 0) { |
a6568fe2 AL |
1454 | goto out; |
1455 | } | |
857bc158 AK |
1456 | stat_to_qid(&stbuf, &qid); |
1457 | if (S_ISDIR(stbuf.st_mode)) { | |
bccacf6c | 1458 | err = v9fs_co_opendir(pdu, fidp); |
857bc158 AK |
1459 | if (err < 0) { |
1460 | goto out; | |
1461 | } | |
1462 | fidp->fid_type = P9_FID_DIR; | |
ddca7f86 MK |
1463 | err = pdu_marshal(pdu, offset, "Qd", &qid, 0); |
1464 | if (err < 0) { | |
1465 | goto out; | |
1466 | } | |
1467 | err += offset; | |
a6568fe2 | 1468 | } else { |
771e9d4c | 1469 | if (s->proto_version == V9FS_PROTO_2000L) { |
d3ab98e6 | 1470 | flags = get_dotl_openflags(s, mode); |
771e9d4c | 1471 | } else { |
857bc158 | 1472 | flags = omode_to_uflags(mode); |
771e9d4c | 1473 | } |
2c74c2cb MK |
1474 | if (is_ro_export(&s->ctx)) { |
1475 | if (mode & O_WRONLY || mode & O_RDWR || | |
1476 | mode & O_APPEND || mode & O_TRUNC) { | |
1477 | err = -EROFS; | |
1478 | goto out; | |
1479 | } | |
2c74c2cb | 1480 | } |
bccacf6c | 1481 | err = v9fs_co_open(pdu, fidp, flags); |
857bc158 AK |
1482 | if (err < 0) { |
1483 | goto out; | |
1484 | } | |
1485 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
1486 | fidp->open_flags = flags; |
1487 | if (flags & O_EXCL) { | |
1488 | /* | |
1489 | * We let the host file system do O_EXCL check | |
1490 | * We should not reclaim such fd | |
1491 | */ | |
1492 | fidp->flags |= FID_NON_RECLAIMABLE; | |
1493 | } | |
bccacf6c | 1494 | iounit = get_iounit(pdu, &fidp->path); |
ddca7f86 MK |
1495 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
1496 | if (err < 0) { | |
1497 | goto out; | |
1498 | } | |
1499 | err += offset; | |
a6568fe2 | 1500 | } |
7999f7e1 AK |
1501 | trace_v9fs_open_return(pdu->tag, pdu->id, |
1502 | qid.type, qid.version, qid.path, iounit); | |
a6568fe2 | 1503 | out: |
bccacf6c | 1504 | put_fid(pdu, fidp); |
84dfb926 | 1505 | out_nofid: |
dc295f83 | 1506 | pdu_complete(pdu, err); |
a6568fe2 AL |
1507 | } |
1508 | ||
8440e22e | 1509 | static void coroutine_fn v9fs_lcreate(void *opaque) |
c1568af5 VJ |
1510 | { |
1511 | int32_t dfid, flags, mode; | |
1512 | gid_t gid; | |
c1568af5 | 1513 | ssize_t err = 0; |
36f8981f | 1514 | ssize_t offset = 7; |
36f8981f VJ |
1515 | V9fsString name; |
1516 | V9fsFidState *fidp; | |
1517 | struct stat stbuf; | |
1518 | V9fsQID qid; | |
1519 | int32_t iounit; | |
1520 | V9fsPDU *pdu = opaque; | |
c1568af5 | 1521 | |
ddca7f86 MK |
1522 | v9fs_string_init(&name); |
1523 | err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, | |
1524 | &name, &flags, &mode, &gid); | |
1525 | if (err < 0) { | |
1526 | goto out_nofid; | |
1527 | } | |
c572f23a | 1528 | trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); |
c1568af5 | 1529 | |
fff39a7a GK |
1530 | if (name_is_illegal(name.data)) { |
1531 | err = -ENOENT; | |
1532 | goto out_nofid; | |
1533 | } | |
1534 | ||
805b5d98 GK |
1535 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
1536 | err = -EEXIST; | |
1537 | goto out_nofid; | |
1538 | } | |
1539 | ||
bccacf6c | 1540 | fidp = get_fid(pdu, dfid); |
36f8981f | 1541 | if (fidp == NULL) { |
c1568af5 | 1542 | err = -ENOENT; |
84dfb926 | 1543 | goto out_nofid; |
c1568af5 | 1544 | } |
c1568af5 | 1545 | |
d3ab98e6 | 1546 | flags = get_dotl_openflags(pdu->s, flags); |
bccacf6c | 1547 | err = v9fs_co_open2(pdu, fidp, &name, gid, |
02cb7f3a | 1548 | flags | O_CREAT, mode, &stbuf); |
36f8981f VJ |
1549 | if (err < 0) { |
1550 | goto out; | |
1551 | } | |
1552 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
1553 | fidp->open_flags = flags; |
1554 | if (flags & O_EXCL) { | |
1555 | /* | |
1556 | * We let the host file system do O_EXCL check | |
1557 | * We should not reclaim such fd | |
1558 | */ | |
1559 | fidp->flags |= FID_NON_RECLAIMABLE; | |
1560 | } | |
bccacf6c | 1561 | iounit = get_iounit(pdu, &fidp->path); |
36f8981f | 1562 | stat_to_qid(&stbuf, &qid); |
ddca7f86 MK |
1563 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
1564 | if (err < 0) { | |
1565 | goto out; | |
1566 | } | |
1567 | err += offset; | |
7999f7e1 AK |
1568 | trace_v9fs_lcreate_return(pdu->tag, pdu->id, |
1569 | qid.type, qid.version, qid.path, iounit); | |
c1568af5 | 1570 | out: |
bccacf6c | 1571 | put_fid(pdu, fidp); |
84dfb926 | 1572 | out_nofid: |
dc295f83 | 1573 | pdu_complete(pdu, err); |
36f8981f | 1574 | v9fs_string_free(&name); |
c1568af5 VJ |
1575 | } |
1576 | ||
ff06030f | 1577 | static void v9fs_fsync(void *opaque) |
b41e95d3 | 1578 | { |
4e9ad444 | 1579 | int err; |
b41e95d3 | 1580 | int32_t fid; |
4e9ad444 | 1581 | int datasync; |
b41e95d3 VJ |
1582 | size_t offset = 7; |
1583 | V9fsFidState *fidp; | |
4e9ad444 | 1584 | V9fsPDU *pdu = opaque; |
b41e95d3 | 1585 | |
ddca7f86 MK |
1586 | err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); |
1587 | if (err < 0) { | |
1588 | goto out_nofid; | |
1589 | } | |
c572f23a HPB |
1590 | trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); |
1591 | ||
bccacf6c | 1592 | fidp = get_fid(pdu, fid); |
b41e95d3 VJ |
1593 | if (fidp == NULL) { |
1594 | err = -ENOENT; | |
84dfb926 | 1595 | goto out_nofid; |
b41e95d3 | 1596 | } |
bccacf6c | 1597 | err = v9fs_co_fsync(pdu, fidp, datasync); |
4e9ad444 AK |
1598 | if (!err) { |
1599 | err = offset; | |
1600 | } | |
bccacf6c | 1601 | put_fid(pdu, fidp); |
84dfb926 | 1602 | out_nofid: |
dc295f83 | 1603 | pdu_complete(pdu, err); |
b41e95d3 VJ |
1604 | } |
1605 | ||
8440e22e | 1606 | static void coroutine_fn v9fs_clunk(void *opaque) |
a6568fe2 | 1607 | { |
c540ee51 | 1608 | int err; |
bbd5697b AL |
1609 | int32_t fid; |
1610 | size_t offset = 7; | |
84dfb926 | 1611 | V9fsFidState *fidp; |
c540ee51 AK |
1612 | V9fsPDU *pdu = opaque; |
1613 | V9fsState *s = pdu->s; | |
bbd5697b | 1614 | |
ddca7f86 MK |
1615 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
1616 | if (err < 0) { | |
1617 | goto out_nofid; | |
1618 | } | |
c572f23a | 1619 | trace_v9fs_clunk(pdu->tag, pdu->id, fid); |
84dfb926 | 1620 | |
ce421a19 | 1621 | fidp = clunk_fid(s, fid); |
84dfb926 AK |
1622 | if (fidp == NULL) { |
1623 | err = -ENOENT; | |
1624 | goto out_nofid; | |
1625 | } | |
ce421a19 AK |
1626 | /* |
1627 | * Bump the ref so that put_fid will | |
1628 | * free the fid. | |
1629 | */ | |
1630 | fidp->ref++; | |
a911a182 AK |
1631 | err = put_fid(pdu, fidp); |
1632 | if (!err) { | |
1633 | err = offset; | |
1634 | } | |
84dfb926 | 1635 | out_nofid: |
dc295f83 | 1636 | pdu_complete(pdu, err); |
9f107513 AL |
1637 | } |
1638 | ||
2f008a8c AK |
1639 | static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
1640 | uint64_t off, uint32_t max_count) | |
a9231555 | 1641 | { |
ddca7f86 | 1642 | ssize_t err; |
d208a0e0 AK |
1643 | size_t offset = 7; |
1644 | int read_count; | |
1645 | int64_t xattr_len; | |
00588a0a | 1646 | V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); |
51b19ebe | 1647 | VirtQueueElement *elem = v->elems[pdu->idx]; |
a9231555 | 1648 | |
d208a0e0 AK |
1649 | xattr_len = fidp->fs.xattr.len; |
1650 | read_count = xattr_len - off; | |
1651 | if (read_count > max_count) { | |
1652 | read_count = max_count; | |
1653 | } else if (read_count < 0) { | |
1654 | /* | |
1655 | * read beyond XATTR value | |
1656 | */ | |
1657 | read_count = 0; | |
a9231555 | 1658 | } |
ddca7f86 MK |
1659 | err = pdu_marshal(pdu, offset, "d", read_count); |
1660 | if (err < 0) { | |
1661 | return err; | |
1662 | } | |
1663 | offset += err; | |
00588a0a WL |
1664 | |
1665 | err = v9fs_pack(elem->in_sg, elem->in_num, offset, | |
ddca7f86 MK |
1666 | ((char *)fidp->fs.xattr.value) + off, |
1667 | read_count); | |
1668 | if (err < 0) { | |
1669 | return err; | |
1670 | } | |
1671 | offset += err; | |
d208a0e0 | 1672 | return offset; |
a9231555 AL |
1673 | } |
1674 | ||
8440e22e GK |
1675 | static int coroutine_fn v9fs_do_readdir_with_stat(V9fsPDU *pdu, |
1676 | V9fsFidState *fidp, | |
1677 | uint32_t max_count) | |
a9231555 | 1678 | { |
2289be19 | 1679 | V9fsPath path; |
d208a0e0 AK |
1680 | V9fsStat v9stat; |
1681 | int len, err = 0; | |
1682 | int32_t count = 0; | |
1683 | struct stat stbuf; | |
1684 | off_t saved_dir_pos; | |
635324e8 | 1685 | struct dirent *dent; |
a9231555 | 1686 | |
d208a0e0 | 1687 | /* save the directory position */ |
bccacf6c | 1688 | saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
d208a0e0 AK |
1689 | if (saved_dir_pos < 0) { |
1690 | return saved_dir_pos; | |
a9231555 | 1691 | } |
5f524c1e | 1692 | |
d208a0e0 | 1693 | while (1) { |
2289be19 | 1694 | v9fs_path_init(&path); |
7cde47d4 GK |
1695 | |
1696 | v9fs_readdir_lock(&fidp->fs.dir); | |
1697 | ||
635324e8 GK |
1698 | err = v9fs_co_readdir(pdu, fidp, &dent); |
1699 | if (err || !dent) { | |
d208a0e0 AK |
1700 | break; |
1701 | } | |
bccacf6c | 1702 | err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); |
d208a0e0 | 1703 | if (err < 0) { |
8762a46d | 1704 | break; |
d208a0e0 | 1705 | } |
bccacf6c | 1706 | err = v9fs_co_lstat(pdu, &path, &stbuf); |
2289be19 | 1707 | if (err < 0) { |
8762a46d | 1708 | break; |
2289be19 | 1709 | } |
bccacf6c | 1710 | err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat); |
d208a0e0 | 1711 | if (err < 0) { |
8762a46d | 1712 | break; |
a9231555 | 1713 | } |
d208a0e0 AK |
1714 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
1715 | len = pdu_marshal(pdu, 11 + count, "S", &v9stat); | |
7cde47d4 GK |
1716 | |
1717 | v9fs_readdir_unlock(&fidp->fs.dir); | |
1718 | ||
d208a0e0 AK |
1719 | if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) { |
1720 | /* Ran out of buffer. Set dir back to old position and return */ | |
bccacf6c | 1721 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
d208a0e0 | 1722 | v9fs_stat_free(&v9stat); |
2289be19 | 1723 | v9fs_path_free(&path); |
d208a0e0 AK |
1724 | return count; |
1725 | } | |
1726 | count += len; | |
1727 | v9fs_stat_free(&v9stat); | |
2289be19 | 1728 | v9fs_path_free(&path); |
d208a0e0 | 1729 | saved_dir_pos = dent->d_off; |
a9231555 | 1730 | } |
8762a46d | 1731 | |
7cde47d4 GK |
1732 | v9fs_readdir_unlock(&fidp->fs.dir); |
1733 | ||
2289be19 | 1734 | v9fs_path_free(&path); |
d208a0e0 AK |
1735 | if (err < 0) { |
1736 | return err; | |
fa32ef88 | 1737 | } |
d208a0e0 | 1738 | return count; |
fa32ef88 AK |
1739 | } |
1740 | ||
302a0d3e SH |
1741 | /* |
1742 | * Create a QEMUIOVector for a sub-region of PDU iovecs | |
1743 | * | |
1744 | * @qiov: uninitialized QEMUIOVector | |
1745 | * @skip: number of bytes to skip from beginning of PDU | |
1746 | * @size: number of bytes to include | |
1747 | * @is_write: true - write, false - read | |
1748 | * | |
1749 | * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up | |
1750 | * with qemu_iovec_destroy(). | |
1751 | */ | |
1752 | static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, | |
1b093c48 | 1753 | size_t skip, size_t size, |
302a0d3e SH |
1754 | bool is_write) |
1755 | { | |
1756 | QEMUIOVector elem; | |
1757 | struct iovec *iov; | |
1758 | unsigned int niov; | |
1759 | ||
592707af | 1760 | virtio_init_iov_from_pdu(pdu, &iov, &niov, is_write); |
302a0d3e SH |
1761 | |
1762 | qemu_iovec_init_external(&elem, iov, niov); | |
1763 | qemu_iovec_init(qiov, niov); | |
1b093c48 | 1764 | qemu_iovec_concat(qiov, &elem, skip, size); |
302a0d3e SH |
1765 | } |
1766 | ||
8440e22e | 1767 | static void coroutine_fn v9fs_read(void *opaque) |
9f107513 | 1768 | { |
a9231555 | 1769 | int32_t fid; |
2f008a8c | 1770 | uint64_t off; |
a9231555 | 1771 | ssize_t err = 0; |
d208a0e0 AK |
1772 | int32_t count = 0; |
1773 | size_t offset = 7; | |
2f008a8c | 1774 | uint32_t max_count; |
d208a0e0 AK |
1775 | V9fsFidState *fidp; |
1776 | V9fsPDU *pdu = opaque; | |
1777 | V9fsState *s = pdu->s; | |
a9231555 | 1778 | |
ddca7f86 MK |
1779 | err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); |
1780 | if (err < 0) { | |
1781 | goto out_nofid; | |
1782 | } | |
c572f23a | 1783 | trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); |
84dfb926 | 1784 | |
bccacf6c | 1785 | fidp = get_fid(pdu, fid); |
d208a0e0 | 1786 | if (fidp == NULL) { |
a9231555 | 1787 | err = -EINVAL; |
84dfb926 | 1788 | goto out_nofid; |
a9231555 | 1789 | } |
d208a0e0 | 1790 | if (fidp->fid_type == P9_FID_DIR) { |
a9231555 | 1791 | |
d208a0e0 | 1792 | if (off == 0) { |
bccacf6c | 1793 | v9fs_co_rewinddir(pdu, fidp); |
a9231555 | 1794 | } |
bccacf6c | 1795 | count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); |
d208a0e0 AK |
1796 | if (count < 0) { |
1797 | err = count; | |
1798 | goto out; | |
56d15a53 | 1799 | } |
ddca7f86 MK |
1800 | err = pdu_marshal(pdu, offset, "d", count); |
1801 | if (err < 0) { | |
1802 | goto out; | |
1803 | } | |
1804 | err += offset + count; | |
d208a0e0 | 1805 | } else if (fidp->fid_type == P9_FID_FILE) { |
302a0d3e SH |
1806 | QEMUIOVector qiov_full; |
1807 | QEMUIOVector qiov; | |
d208a0e0 | 1808 | int32_t len; |
d208a0e0 | 1809 | |
302a0d3e SH |
1810 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); |
1811 | qemu_iovec_init(&qiov, qiov_full.niov); | |
d208a0e0 | 1812 | do { |
302a0d3e | 1813 | qemu_iovec_reset(&qiov); |
1b093c48 | 1814 | qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); |
d208a0e0 | 1815 | if (0) { |
302a0d3e | 1816 | print_sg(qiov.iov, qiov.niov); |
d208a0e0 AK |
1817 | } |
1818 | /* Loop in case of EINTR */ | |
1819 | do { | |
302a0d3e | 1820 | len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); |
d208a0e0 AK |
1821 | if (len >= 0) { |
1822 | off += len; | |
1823 | count += len; | |
1824 | } | |
bccacf6c | 1825 | } while (len == -EINTR && !pdu->cancelled); |
d208a0e0 AK |
1826 | if (len < 0) { |
1827 | /* IO error return the error */ | |
1828 | err = len; | |
e95c9a49 | 1829 | goto out_free_iovec; |
d208a0e0 | 1830 | } |
d208a0e0 | 1831 | } while (count < max_count && len > 0); |
ddca7f86 MK |
1832 | err = pdu_marshal(pdu, offset, "d", count); |
1833 | if (err < 0) { | |
e95c9a49 | 1834 | goto out_free_iovec; |
ddca7f86 MK |
1835 | } |
1836 | err += offset + count; | |
e95c9a49 | 1837 | out_free_iovec: |
302a0d3e SH |
1838 | qemu_iovec_destroy(&qiov); |
1839 | qemu_iovec_destroy(&qiov_full); | |
d208a0e0 AK |
1840 | } else if (fidp->fid_type == P9_FID_XATTR) { |
1841 | err = v9fs_xattr_read(s, pdu, fidp, off, max_count); | |
a9231555 AL |
1842 | } else { |
1843 | err = -EINVAL; | |
9f107513 | 1844 | } |
7999f7e1 | 1845 | trace_v9fs_read_return(pdu->tag, pdu->id, count, err); |
a9231555 | 1846 | out: |
bccacf6c | 1847 | put_fid(pdu, fidp); |
84dfb926 | 1848 | out_nofid: |
dc295f83 | 1849 | pdu_complete(pdu, err); |
9f107513 AL |
1850 | } |
1851 | ||
5e4eaa79 | 1852 | static size_t v9fs_readdir_data_size(V9fsString *name) |
c18e2f94 | 1853 | { |
5e4eaa79 AK |
1854 | /* |
1855 | * Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
1856 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
1857 | */ | |
1858 | return 24 + v9fs_string_size(name); | |
c18e2f94 SK |
1859 | } |
1860 | ||
8440e22e GK |
1861 | static int coroutine_fn v9fs_do_readdir(V9fsPDU *pdu, V9fsFidState *fidp, |
1862 | int32_t max_count) | |
c18e2f94 | 1863 | { |
c18e2f94 | 1864 | size_t size; |
5e4eaa79 AK |
1865 | V9fsQID qid; |
1866 | V9fsString name; | |
1867 | int len, err = 0; | |
1868 | int32_t count = 0; | |
1869 | off_t saved_dir_pos; | |
635324e8 | 1870 | struct dirent *dent; |
c18e2f94 | 1871 | |
5e4eaa79 | 1872 | /* save the directory position */ |
bccacf6c | 1873 | saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
5e4eaa79 AK |
1874 | if (saved_dir_pos < 0) { |
1875 | return saved_dir_pos; | |
1876 | } | |
5f524c1e | 1877 | |
5e4eaa79 | 1878 | while (1) { |
7cde47d4 GK |
1879 | v9fs_readdir_lock(&fidp->fs.dir); |
1880 | ||
635324e8 GK |
1881 | err = v9fs_co_readdir(pdu, fidp, &dent); |
1882 | if (err || !dent) { | |
5e4eaa79 AK |
1883 | break; |
1884 | } | |
1885 | v9fs_string_init(&name); | |
1886 | v9fs_string_sprintf(&name, "%s", dent->d_name); | |
1887 | if ((count + v9fs_readdir_data_size(&name)) > max_count) { | |
7cde47d4 GK |
1888 | v9fs_readdir_unlock(&fidp->fs.dir); |
1889 | ||
c18e2f94 | 1890 | /* Ran out of buffer. Set dir back to old position and return */ |
bccacf6c | 1891 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
5e4eaa79 AK |
1892 | v9fs_string_free(&name); |
1893 | return count; | |
c18e2f94 | 1894 | } |
5e4eaa79 AK |
1895 | /* |
1896 | * Fill up just the path field of qid because the client uses | |
c18e2f94 SK |
1897 | * only that. To fill the entire qid structure we will have |
1898 | * to stat each dirent found, which is expensive | |
1899 | */ | |
5e4eaa79 AK |
1900 | size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); |
1901 | memcpy(&qid.path, &dent->d_ino, size); | |
c18e2f94 | 1902 | /* Fill the other fields with dummy values */ |
5e4eaa79 AK |
1903 | qid.type = 0; |
1904 | qid.version = 0; | |
c18e2f94 | 1905 | |
5e4eaa79 AK |
1906 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
1907 | len = pdu_marshal(pdu, 11 + count, "Qqbs", | |
1908 | &qid, dent->d_off, | |
1909 | dent->d_type, &name); | |
7cde47d4 GK |
1910 | |
1911 | v9fs_readdir_unlock(&fidp->fs.dir); | |
1912 | ||
ddca7f86 MK |
1913 | if (len < 0) { |
1914 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); | |
1915 | v9fs_string_free(&name); | |
ddca7f86 MK |
1916 | return len; |
1917 | } | |
5e4eaa79 AK |
1918 | count += len; |
1919 | v9fs_string_free(&name); | |
1920 | saved_dir_pos = dent->d_off; | |
1921 | } | |
7cde47d4 GK |
1922 | |
1923 | v9fs_readdir_unlock(&fidp->fs.dir); | |
1924 | ||
5e4eaa79 AK |
1925 | if (err < 0) { |
1926 | return err; | |
1927 | } | |
1928 | return count; | |
c18e2f94 SK |
1929 | } |
1930 | ||
8440e22e | 1931 | static void coroutine_fn v9fs_readdir(void *opaque) |
c18e2f94 SK |
1932 | { |
1933 | int32_t fid; | |
5e4eaa79 AK |
1934 | V9fsFidState *fidp; |
1935 | ssize_t retval = 0; | |
c18e2f94 | 1936 | size_t offset = 7; |
2f008a8c AK |
1937 | uint64_t initial_offset; |
1938 | int32_t count; | |
1939 | uint32_t max_count; | |
5e4eaa79 | 1940 | V9fsPDU *pdu = opaque; |
c18e2f94 | 1941 | |
ddca7f86 MK |
1942 | retval = pdu_unmarshal(pdu, offset, "dqd", &fid, |
1943 | &initial_offset, &max_count); | |
1944 | if (retval < 0) { | |
1945 | goto out_nofid; | |
1946 | } | |
c572f23a HPB |
1947 | trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); |
1948 | ||
bccacf6c | 1949 | fidp = get_fid(pdu, fid); |
84dfb926 AK |
1950 | if (fidp == NULL) { |
1951 | retval = -EINVAL; | |
1952 | goto out_nofid; | |
1953 | } | |
f314ea4e | 1954 | if (!fidp->fs.dir.stream) { |
5e4eaa79 | 1955 | retval = -EINVAL; |
c18e2f94 SK |
1956 | goto out; |
1957 | } | |
5e4eaa79 | 1958 | if (initial_offset == 0) { |
bccacf6c | 1959 | v9fs_co_rewinddir(pdu, fidp); |
c18e2f94 | 1960 | } else { |
bccacf6c | 1961 | v9fs_co_seekdir(pdu, fidp, initial_offset); |
c18e2f94 | 1962 | } |
bccacf6c | 1963 | count = v9fs_do_readdir(pdu, fidp, max_count); |
5e4eaa79 AK |
1964 | if (count < 0) { |
1965 | retval = count; | |
1966 | goto out; | |
1967 | } | |
ddca7f86 MK |
1968 | retval = pdu_marshal(pdu, offset, "d", count); |
1969 | if (retval < 0) { | |
1970 | goto out; | |
1971 | } | |
1972 | retval += count + offset; | |
7999f7e1 | 1973 | trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); |
c18e2f94 | 1974 | out: |
bccacf6c | 1975 | put_fid(pdu, fidp); |
84dfb926 | 1976 | out_nofid: |
dc295f83 | 1977 | pdu_complete(pdu, retval); |
c18e2f94 SK |
1978 | } |
1979 | ||
d7a90491 | 1980 | static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
2f008a8c | 1981 | uint64_t off, uint32_t count, |
d7a90491 | 1982 | struct iovec *sg, int cnt) |
10b468bd AK |
1983 | { |
1984 | int i, to_copy; | |
1985 | ssize_t err = 0; | |
1986 | int write_count; | |
1987 | int64_t xattr_len; | |
d7a90491 | 1988 | size_t offset = 7; |
10b468bd | 1989 | |
d7a90491 AK |
1990 | |
1991 | xattr_len = fidp->fs.xattr.len; | |
1992 | write_count = xattr_len - off; | |
1993 | if (write_count > count) { | |
1994 | write_count = count; | |
10b468bd AK |
1995 | } else if (write_count < 0) { |
1996 | /* | |
1997 | * write beyond XATTR value len specified in | |
1998 | * xattrcreate | |
1999 | */ | |
2000 | err = -ENOSPC; | |
2001 | goto out; | |
2002 | } | |
ddca7f86 MK |
2003 | err = pdu_marshal(pdu, offset, "d", write_count); |
2004 | if (err < 0) { | |
2005 | return err; | |
2006 | } | |
2007 | err += offset; | |
d7a90491 | 2008 | fidp->fs.xattr.copied_len += write_count; |
10b468bd AK |
2009 | /* |
2010 | * Now copy the content from sg list | |
2011 | */ | |
d7a90491 AK |
2012 | for (i = 0; i < cnt; i++) { |
2013 | if (write_count > sg[i].iov_len) { | |
2014 | to_copy = sg[i].iov_len; | |
10b468bd AK |
2015 | } else { |
2016 | to_copy = write_count; | |
2017 | } | |
d7a90491 | 2018 | memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); |
10b468bd | 2019 | /* updating vs->off since we are not using below */ |
d7a90491 | 2020 | off += to_copy; |
10b468bd AK |
2021 | write_count -= to_copy; |
2022 | } | |
2023 | out: | |
d7a90491 | 2024 | return err; |
10b468bd AK |
2025 | } |
2026 | ||
8440e22e | 2027 | static void coroutine_fn v9fs_write(void *opaque) |
9f107513 | 2028 | { |
d7a90491 AK |
2029 | ssize_t err; |
2030 | int32_t fid; | |
2f008a8c AK |
2031 | uint64_t off; |
2032 | uint32_t count; | |
d7a90491 AK |
2033 | int32_t len = 0; |
2034 | int32_t total = 0; | |
2035 | size_t offset = 7; | |
2036 | V9fsFidState *fidp; | |
ff06030f VJ |
2037 | V9fsPDU *pdu = opaque; |
2038 | V9fsState *s = pdu->s; | |
302a0d3e SH |
2039 | QEMUIOVector qiov_full; |
2040 | QEMUIOVector qiov; | |
8449360c | 2041 | |
ddca7f86 MK |
2042 | err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); |
2043 | if (err < 0) { | |
dc295f83 | 2044 | pdu_complete(pdu, err); |
0289a412 | 2045 | return; |
ddca7f86 MK |
2046 | } |
2047 | offset += err; | |
302a0d3e SH |
2048 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); |
2049 | trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); | |
84dfb926 | 2050 | |
bccacf6c | 2051 | fidp = get_fid(pdu, fid); |
d7a90491 | 2052 | if (fidp == NULL) { |
8449360c | 2053 | err = -EINVAL; |
84dfb926 | 2054 | goto out_nofid; |
9f107513 | 2055 | } |
d7a90491 AK |
2056 | if (fidp->fid_type == P9_FID_FILE) { |
2057 | if (fidp->fs.fd == -1) { | |
10b468bd AK |
2058 | err = -EINVAL; |
2059 | goto out; | |
2060 | } | |
d7a90491 | 2061 | } else if (fidp->fid_type == P9_FID_XATTR) { |
10b468bd AK |
2062 | /* |
2063 | * setxattr operation | |
2064 | */ | |
302a0d3e SH |
2065 | err = v9fs_xattr_write(s, pdu, fidp, off, count, |
2066 | qiov_full.iov, qiov_full.niov); | |
d7a90491 | 2067 | goto out; |
10b468bd | 2068 | } else { |
8449360c AL |
2069 | err = -EINVAL; |
2070 | goto out; | |
2071 | } | |
302a0d3e | 2072 | qemu_iovec_init(&qiov, qiov_full.niov); |
d7a90491 | 2073 | do { |
302a0d3e | 2074 | qemu_iovec_reset(&qiov); |
1b093c48 | 2075 | qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); |
d7a90491 | 2076 | if (0) { |
302a0d3e | 2077 | print_sg(qiov.iov, qiov.niov); |
56d15a53 | 2078 | } |
d7a90491 AK |
2079 | /* Loop in case of EINTR */ |
2080 | do { | |
302a0d3e | 2081 | len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); |
d7a90491 AK |
2082 | if (len >= 0) { |
2083 | off += len; | |
2084 | total += len; | |
2085 | } | |
bccacf6c | 2086 | } while (len == -EINTR && !pdu->cancelled); |
d7a90491 AK |
2087 | if (len < 0) { |
2088 | /* IO error return the error */ | |
2089 | err = len; | |
302a0d3e | 2090 | goto out_qiov; |
d7a90491 | 2091 | } |
d7a90491 | 2092 | } while (total < count && len > 0); |
302a0d3e SH |
2093 | |
2094 | offset = 7; | |
ddca7f86 MK |
2095 | err = pdu_marshal(pdu, offset, "d", total); |
2096 | if (err < 0) { | |
2097 | goto out; | |
2098 | } | |
2099 | err += offset; | |
7999f7e1 | 2100 | trace_v9fs_write_return(pdu->tag, pdu->id, total, err); |
302a0d3e SH |
2101 | out_qiov: |
2102 | qemu_iovec_destroy(&qiov); | |
8449360c | 2103 | out: |
bccacf6c | 2104 | put_fid(pdu, fidp); |
84dfb926 | 2105 | out_nofid: |
302a0d3e | 2106 | qemu_iovec_destroy(&qiov_full); |
dc295f83 | 2107 | pdu_complete(pdu, err); |
9f107513 AL |
2108 | } |
2109 | ||
8440e22e | 2110 | static void coroutine_fn v9fs_create(void *opaque) |
5e94c103 | 2111 | { |
baaa86d9 VJ |
2112 | int32_t fid; |
2113 | int err = 0; | |
2114 | size_t offset = 7; | |
2115 | V9fsFidState *fidp; | |
2116 | V9fsQID qid; | |
2117 | int32_t perm; | |
2118 | int8_t mode; | |
2289be19 | 2119 | V9fsPath path; |
baaa86d9 VJ |
2120 | struct stat stbuf; |
2121 | V9fsString name; | |
2122 | V9fsString extension; | |
baaa86d9 VJ |
2123 | int iounit; |
2124 | V9fsPDU *pdu = opaque; | |
c494dd6f | 2125 | |
2289be19 | 2126 | v9fs_path_init(&path); |
ddca7f86 MK |
2127 | v9fs_string_init(&name); |
2128 | v9fs_string_init(&extension); | |
2129 | err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, | |
2130 | &perm, &mode, &extension); | |
2131 | if (err < 0) { | |
2132 | goto out_nofid; | |
2133 | } | |
c572f23a HPB |
2134 | trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); |
2135 | ||
fff39a7a GK |
2136 | if (name_is_illegal(name.data)) { |
2137 | err = -ENOENT; | |
2138 | goto out_nofid; | |
2139 | } | |
2140 | ||
805b5d98 GK |
2141 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2142 | err = -EEXIST; | |
2143 | goto out_nofid; | |
2144 | } | |
2145 | ||
bccacf6c | 2146 | fidp = get_fid(pdu, fid); |
baaa86d9 VJ |
2147 | if (fidp == NULL) { |
2148 | err = -EINVAL; | |
84dfb926 | 2149 | goto out_nofid; |
c494dd6f | 2150 | } |
baaa86d9 | 2151 | if (perm & P9_STAT_MODE_DIR) { |
bccacf6c | 2152 | err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, |
02cb7f3a | 2153 | fidp->uid, -1, &stbuf); |
baaa86d9 VJ |
2154 | if (err < 0) { |
2155 | goto out; | |
2156 | } | |
bccacf6c | 2157 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2158 | if (err < 0) { |
2159 | goto out; | |
2160 | } | |
2161 | v9fs_path_copy(&fidp->path, &path); | |
bccacf6c | 2162 | err = v9fs_co_opendir(pdu, fidp); |
baaa86d9 VJ |
2163 | if (err < 0) { |
2164 | goto out; | |
2165 | } | |
2166 | fidp->fid_type = P9_FID_DIR; | |
2167 | } else if (perm & P9_STAT_MODE_SYMLINK) { | |
bccacf6c | 2168 | err = v9fs_co_symlink(pdu, fidp, &name, |
02cb7f3a | 2169 | extension.data, -1 , &stbuf); |
baaa86d9 | 2170 | if (err < 0) { |
baaa86d9 VJ |
2171 | goto out; |
2172 | } | |
bccacf6c | 2173 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2174 | if (err < 0) { |
2175 | goto out; | |
2176 | } | |
2177 | v9fs_path_copy(&fidp->path, &path); | |
baaa86d9 | 2178 | } else if (perm & P9_STAT_MODE_LINK) { |
2289be19 | 2179 | int32_t ofid = atoi(extension.data); |
bccacf6c | 2180 | V9fsFidState *ofidp = get_fid(pdu, ofid); |
2289be19 | 2181 | if (ofidp == NULL) { |
baaa86d9 VJ |
2182 | err = -EINVAL; |
2183 | goto out; | |
2184 | } | |
bccacf6c AK |
2185 | err = v9fs_co_link(pdu, ofidp, fidp, &name); |
2186 | put_fid(pdu, ofidp); | |
2289be19 AK |
2187 | if (err < 0) { |
2188 | goto out; | |
2189 | } | |
bccacf6c | 2190 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
baaa86d9 | 2191 | if (err < 0) { |
2289be19 | 2192 | fidp->fid_type = P9_FID_NONE; |
baaa86d9 | 2193 | goto out; |
c494dd6f | 2194 | } |
2289be19 | 2195 | v9fs_path_copy(&fidp->path, &path); |
bccacf6c | 2196 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
02cb7f3a AK |
2197 | if (err < 0) { |
2198 | fidp->fid_type = P9_FID_NONE; | |
2199 | goto out; | |
2200 | } | |
baaa86d9 | 2201 | } else if (perm & P9_STAT_MODE_DEVICE) { |
c494dd6f AL |
2202 | char ctype; |
2203 | uint32_t major, minor; | |
2204 | mode_t nmode = 0; | |
2205 | ||
baaa86d9 | 2206 | if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { |
c494dd6f | 2207 | err = -errno; |
baaa86d9 | 2208 | goto out; |
c494dd6f AL |
2209 | } |
2210 | ||
2211 | switch (ctype) { | |
2212 | case 'c': | |
2213 | nmode = S_IFCHR; | |
2214 | break; | |
2215 | case 'b': | |
2216 | nmode = S_IFBLK; | |
2217 | break; | |
2218 | default: | |
2219 | err = -EIO; | |
baaa86d9 VJ |
2220 | goto out; |
2221 | } | |
c1568af5 | 2222 | |
baaa86d9 | 2223 | nmode |= perm & 0777; |
bccacf6c | 2224 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2225 | makedev(major, minor), nmode, &stbuf); |
baaa86d9 VJ |
2226 | if (err < 0) { |
2227 | goto out; | |
2228 | } | |
bccacf6c | 2229 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2230 | if (err < 0) { |
2231 | goto out; | |
2232 | } | |
2233 | v9fs_path_copy(&fidp->path, &path); | |
baaa86d9 | 2234 | } else if (perm & P9_STAT_MODE_NAMED_PIPE) { |
bccacf6c | 2235 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2236 | 0, S_IFIFO | (perm & 0777), &stbuf); |
baaa86d9 VJ |
2237 | if (err < 0) { |
2238 | goto out; | |
2239 | } | |
bccacf6c | 2240 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2241 | if (err < 0) { |
2242 | goto out; | |
2243 | } | |
2244 | v9fs_path_copy(&fidp->path, &path); | |
baaa86d9 | 2245 | } else if (perm & P9_STAT_MODE_SOCKET) { |
bccacf6c | 2246 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2247 | 0, S_IFSOCK | (perm & 0777), &stbuf); |
baaa86d9 VJ |
2248 | if (err < 0) { |
2249 | goto out; | |
2250 | } | |
bccacf6c | 2251 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2252 | if (err < 0) { |
2253 | goto out; | |
2254 | } | |
2255 | v9fs_path_copy(&fidp->path, &path); | |
baaa86d9 | 2256 | } else { |
bccacf6c | 2257 | err = v9fs_co_open2(pdu, fidp, &name, -1, |
02cb7f3a | 2258 | omode_to_uflags(mode)|O_CREAT, perm, &stbuf); |
baaa86d9 VJ |
2259 | if (err < 0) { |
2260 | goto out; | |
2261 | } | |
2262 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
2263 | fidp->open_flags = omode_to_uflags(mode); |
2264 | if (fidp->open_flags & O_EXCL) { | |
2265 | /* | |
2266 | * We let the host file system do O_EXCL check | |
2267 | * We should not reclaim such fd | |
2268 | */ | |
2269 | fidp->flags |= FID_NON_RECLAIMABLE; | |
2270 | } | |
c494dd6f | 2271 | } |
bccacf6c | 2272 | iounit = get_iounit(pdu, &fidp->path); |
baaa86d9 | 2273 | stat_to_qid(&stbuf, &qid); |
ddca7f86 MK |
2274 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
2275 | if (err < 0) { | |
2276 | goto out; | |
2277 | } | |
2278 | err += offset; | |
7999f7e1 AK |
2279 | trace_v9fs_create_return(pdu->tag, pdu->id, |
2280 | qid.type, qid.version, qid.path, iounit); | |
c494dd6f | 2281 | out: |
bccacf6c | 2282 | put_fid(pdu, fidp); |
84dfb926 | 2283 | out_nofid: |
dc295f83 | 2284 | pdu_complete(pdu, err); |
baaa86d9 VJ |
2285 | v9fs_string_free(&name); |
2286 | v9fs_string_free(&extension); | |
2289be19 | 2287 | v9fs_path_free(&path); |
9f107513 AL |
2288 | } |
2289 | ||
8440e22e | 2290 | static void coroutine_fn v9fs_symlink(void *opaque) |
08c60fc9 | 2291 | { |
ff06030f | 2292 | V9fsPDU *pdu = opaque; |
3fa2a8d1 VJ |
2293 | V9fsString name; |
2294 | V9fsString symname; | |
3fa2a8d1 VJ |
2295 | V9fsFidState *dfidp; |
2296 | V9fsQID qid; | |
2297 | struct stat stbuf; | |
08c60fc9 | 2298 | int32_t dfid; |
08c60fc9 VJ |
2299 | int err = 0; |
2300 | gid_t gid; | |
3fa2a8d1 | 2301 | size_t offset = 7; |
08c60fc9 | 2302 | |
ddca7f86 MK |
2303 | v9fs_string_init(&name); |
2304 | v9fs_string_init(&symname); | |
2305 | err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); | |
2306 | if (err < 0) { | |
2307 | goto out_nofid; | |
2308 | } | |
c572f23a | 2309 | trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); |
08c60fc9 | 2310 | |
fff39a7a GK |
2311 | if (name_is_illegal(name.data)) { |
2312 | err = -ENOENT; | |
2313 | goto out_nofid; | |
2314 | } | |
2315 | ||
805b5d98 GK |
2316 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2317 | err = -EEXIST; | |
2318 | goto out_nofid; | |
2319 | } | |
2320 | ||
bccacf6c | 2321 | dfidp = get_fid(pdu, dfid); |
3fa2a8d1 | 2322 | if (dfidp == NULL) { |
08c60fc9 | 2323 | err = -EINVAL; |
84dfb926 | 2324 | goto out_nofid; |
08c60fc9 | 2325 | } |
bccacf6c | 2326 | err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); |
3fa2a8d1 VJ |
2327 | if (err < 0) { |
2328 | goto out; | |
2329 | } | |
2330 | stat_to_qid(&stbuf, &qid); | |
ddca7f86 MK |
2331 | err = pdu_marshal(pdu, offset, "Q", &qid); |
2332 | if (err < 0) { | |
2333 | goto out; | |
2334 | } | |
2335 | err += offset; | |
7999f7e1 AK |
2336 | trace_v9fs_symlink_return(pdu->tag, pdu->id, |
2337 | qid.type, qid.version, qid.path); | |
08c60fc9 | 2338 | out: |
bccacf6c | 2339 | put_fid(pdu, dfidp); |
84dfb926 | 2340 | out_nofid: |
dc295f83 | 2341 | pdu_complete(pdu, err); |
3fa2a8d1 VJ |
2342 | v9fs_string_free(&name); |
2343 | v9fs_string_free(&symname); | |
08c60fc9 VJ |
2344 | } |
2345 | ||
ff06030f | 2346 | static void v9fs_flush(void *opaque) |
9f107513 | 2347 | { |
ddca7f86 | 2348 | ssize_t err; |
bccacf6c AK |
2349 | int16_t tag; |
2350 | size_t offset = 7; | |
2351 | V9fsPDU *cancel_pdu; | |
ff06030f VJ |
2352 | V9fsPDU *pdu = opaque; |
2353 | V9fsState *s = pdu->s; | |
bccacf6c | 2354 | |
ddca7f86 MK |
2355 | err = pdu_unmarshal(pdu, offset, "w", &tag); |
2356 | if (err < 0) { | |
dc295f83 | 2357 | pdu_complete(pdu, err); |
ddca7f86 MK |
2358 | return; |
2359 | } | |
c572f23a | 2360 | trace_v9fs_flush(pdu->tag, pdu->id, tag); |
bccacf6c AK |
2361 | |
2362 | QLIST_FOREACH(cancel_pdu, &s->active_list, next) { | |
2363 | if (cancel_pdu->tag == tag) { | |
2364 | break; | |
2365 | } | |
2366 | } | |
2367 | if (cancel_pdu) { | |
2368 | cancel_pdu->cancelled = 1; | |
2369 | /* | |
2370 | * Wait for pdu to complete. | |
2371 | */ | |
2372 | qemu_co_queue_wait(&cancel_pdu->complete); | |
2373 | cancel_pdu->cancelled = 0; | |
dc295f83 | 2374 | pdu_free(cancel_pdu); |
bccacf6c | 2375 | } |
dc295f83 | 2376 | pdu_complete(pdu, 7); |
9f107513 AL |
2377 | } |
2378 | ||
8440e22e | 2379 | static void coroutine_fn v9fs_link(void *opaque) |
b2c224be | 2380 | { |
ff06030f | 2381 | V9fsPDU *pdu = opaque; |
b2c224be VJ |
2382 | int32_t dfid, oldfid; |
2383 | V9fsFidState *dfidp, *oldfidp; | |
3a93113a | 2384 | V9fsString name; |
b2c224be VJ |
2385 | size_t offset = 7; |
2386 | int err = 0; | |
2387 | ||
ddca7f86 MK |
2388 | v9fs_string_init(&name); |
2389 | err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); | |
2390 | if (err < 0) { | |
2391 | goto out_nofid; | |
2392 | } | |
c572f23a | 2393 | trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); |
b2c224be | 2394 | |
fff39a7a GK |
2395 | if (name_is_illegal(name.data)) { |
2396 | err = -ENOENT; | |
2397 | goto out_nofid; | |
2398 | } | |
2399 | ||
805b5d98 GK |
2400 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2401 | err = -EEXIST; | |
2402 | goto out_nofid; | |
2403 | } | |
2404 | ||
bccacf6c | 2405 | dfidp = get_fid(pdu, dfid); |
b2c224be | 2406 | if (dfidp == NULL) { |
ffd66876 | 2407 | err = -ENOENT; |
84dfb926 | 2408 | goto out_nofid; |
b2c224be VJ |
2409 | } |
2410 | ||
bccacf6c | 2411 | oldfidp = get_fid(pdu, oldfid); |
b2c224be | 2412 | if (oldfidp == NULL) { |
ffd66876 | 2413 | err = -ENOENT; |
b2c224be VJ |
2414 | goto out; |
2415 | } | |
bccacf6c | 2416 | err = v9fs_co_link(pdu, oldfidp, dfidp, &name); |
ffd66876 VJ |
2417 | if (!err) { |
2418 | err = offset; | |
b2c224be | 2419 | } |
b2c224be | 2420 | out: |
bccacf6c | 2421 | put_fid(pdu, dfidp); |
84dfb926 | 2422 | out_nofid: |
b2c224be | 2423 | v9fs_string_free(&name); |
dc295f83 | 2424 | pdu_complete(pdu, err); |
b2c224be VJ |
2425 | } |
2426 | ||
532decb7 | 2427 | /* Only works with path name based fid */ |
8440e22e | 2428 | static void coroutine_fn v9fs_remove(void *opaque) |
9f107513 | 2429 | { |
5bae1900 | 2430 | int32_t fid; |
5bae1900 | 2431 | int err = 0; |
ae1ef571 VJ |
2432 | size_t offset = 7; |
2433 | V9fsFidState *fidp; | |
2434 | V9fsPDU *pdu = opaque; | |
5bae1900 | 2435 | |
ddca7f86 MK |
2436 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
2437 | if (err < 0) { | |
2438 | goto out_nofid; | |
2439 | } | |
c572f23a | 2440 | trace_v9fs_remove(pdu->tag, pdu->id, fid); |
5bae1900 | 2441 | |
bccacf6c | 2442 | fidp = get_fid(pdu, fid); |
ae1ef571 | 2443 | if (fidp == NULL) { |
5bae1900 | 2444 | err = -EINVAL; |
84dfb926 | 2445 | goto out_nofid; |
9f107513 | 2446 | } |
532decb7 | 2447 | /* if fs driver is not path based, return EOPNOTSUPP */ |
c98f1d4a | 2448 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { |
532decb7 AK |
2449 | err = -EOPNOTSUPP; |
2450 | goto out_err; | |
2451 | } | |
7a462745 AK |
2452 | /* |
2453 | * IF the file is unlinked, we cannot reopen | |
2454 | * the file later. So don't reclaim fd | |
2455 | */ | |
bccacf6c | 2456 | err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); |
7a462745 AK |
2457 | if (err < 0) { |
2458 | goto out_err; | |
2459 | } | |
bccacf6c | 2460 | err = v9fs_co_remove(pdu, &fidp->path); |
ae1ef571 VJ |
2461 | if (!err) { |
2462 | err = offset; | |
2463 | } | |
7a462745 | 2464 | out_err: |
ae1ef571 | 2465 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
84dfb926 | 2466 | clunk_fid(pdu->s, fidp->fid); |
bccacf6c | 2467 | put_fid(pdu, fidp); |
84dfb926 | 2468 | out_nofid: |
dc295f83 | 2469 | pdu_complete(pdu, err); |
9f107513 AL |
2470 | } |
2471 | ||
8440e22e | 2472 | static void coroutine_fn v9fs_unlinkat(void *opaque) |
7834cf77 AK |
2473 | { |
2474 | int err = 0; | |
2475 | V9fsString name; | |
2476 | int32_t dfid, flags; | |
2477 | size_t offset = 7; | |
2289be19 | 2478 | V9fsPath path; |
7834cf77 AK |
2479 | V9fsFidState *dfidp; |
2480 | V9fsPDU *pdu = opaque; | |
7834cf77 | 2481 | |
ddca7f86 MK |
2482 | v9fs_string_init(&name); |
2483 | err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); | |
2484 | if (err < 0) { | |
2485 | goto out_nofid; | |
2486 | } | |
fff39a7a GK |
2487 | |
2488 | if (name_is_illegal(name.data)) { | |
2489 | err = -ENOENT; | |
2490 | goto out_nofid; | |
2491 | } | |
2492 | ||
805b5d98 GK |
2493 | if (!strcmp(".", name.data)) { |
2494 | err = -EINVAL; | |
2495 | goto out_nofid; | |
2496 | } | |
2497 | ||
2498 | if (!strcmp("..", name.data)) { | |
2499 | err = -ENOTEMPTY; | |
2500 | goto out_nofid; | |
2501 | } | |
2502 | ||
bccacf6c | 2503 | dfidp = get_fid(pdu, dfid); |
7834cf77 AK |
2504 | if (dfidp == NULL) { |
2505 | err = -EINVAL; | |
2506 | goto out_nofid; | |
2507 | } | |
7834cf77 AK |
2508 | /* |
2509 | * IF the file is unlinked, we cannot reopen | |
2510 | * the file later. So don't reclaim fd | |
2511 | */ | |
2289be19 | 2512 | v9fs_path_init(&path); |
bccacf6c | 2513 | err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); |
2289be19 AK |
2514 | if (err < 0) { |
2515 | goto out_err; | |
2516 | } | |
bccacf6c | 2517 | err = v9fs_mark_fids_unreclaim(pdu, &path); |
7834cf77 AK |
2518 | if (err < 0) { |
2519 | goto out_err; | |
2520 | } | |
bccacf6c | 2521 | err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags); |
7834cf77 AK |
2522 | if (!err) { |
2523 | err = offset; | |
2524 | } | |
2525 | out_err: | |
bccacf6c | 2526 | put_fid(pdu, dfidp); |
2289be19 | 2527 | v9fs_path_free(&path); |
7834cf77 | 2528 | out_nofid: |
dc295f83 | 2529 | pdu_complete(pdu, err); |
7834cf77 AK |
2530 | v9fs_string_free(&name); |
2531 | } | |
2532 | ||
2289be19 AK |
2533 | |
2534 | /* Only works with path name based fid */ | |
8440e22e GK |
2535 | static int coroutine_fn v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, |
2536 | int32_t newdirfid, | |
2537 | V9fsString *name) | |
8cf89e00 | 2538 | { |
930b1e17 | 2539 | char *end; |
c7b4b0b3 | 2540 | int err = 0; |
2289be19 AK |
2541 | V9fsPath new_path; |
2542 | V9fsFidState *tfidp; | |
bccacf6c | 2543 | V9fsState *s = pdu->s; |
84dfb926 | 2544 | V9fsFidState *dirfidp = NULL; |
c7b4b0b3 | 2545 | char *old_name, *new_name; |
8cf89e00 | 2546 | |
2289be19 | 2547 | v9fs_path_init(&new_path); |
930b1e17 | 2548 | if (newdirfid != -1) { |
bccacf6c | 2549 | dirfidp = get_fid(pdu, newdirfid); |
c7b4b0b3 MK |
2550 | if (dirfidp == NULL) { |
2551 | err = -ENOENT; | |
84dfb926 | 2552 | goto out_nofid; |
c7b4b0b3 | 2553 | } |
d62dbb51 | 2554 | BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
bccacf6c | 2555 | v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); |
c7b4b0b3 | 2556 | } else { |
930b1e17 | 2557 | old_name = fidp->path.data; |
8cf89e00 AL |
2558 | end = strrchr(old_name, '/'); |
2559 | if (end) { | |
2560 | end++; | |
2561 | } else { | |
2562 | end = old_name; | |
2563 | } | |
7267c094 | 2564 | new_name = g_malloc0(end - old_name + name->size + 1); |
c7b4b0b3 | 2565 | strncat(new_name, old_name, end - old_name); |
930b1e17 | 2566 | strncat(new_name + (end - old_name), name->data, name->size); |
bccacf6c | 2567 | v9fs_co_name_to_path(pdu, NULL, new_name, &new_path); |
2289be19 | 2568 | g_free(new_name); |
c7b4b0b3 | 2569 | } |
bccacf6c | 2570 | err = v9fs_co_rename(pdu, &fidp->path, &new_path); |
2289be19 AK |
2571 | if (err < 0) { |
2572 | goto out; | |
2573 | } | |
2574 | /* | |
2575 | * Fixup fid's pointing to the old name to | |
2576 | * start pointing to the new name | |
2577 | */ | |
2578 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
2579 | if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { | |
2580 | /* replace the name */ | |
2581 | v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); | |
8cf89e00 AL |
2582 | } |
2583 | } | |
c7b4b0b3 | 2584 | out: |
84dfb926 | 2585 | if (dirfidp) { |
bccacf6c | 2586 | put_fid(pdu, dirfidp); |
84dfb926 | 2587 | } |
2289be19 | 2588 | v9fs_path_free(&new_path); |
84dfb926 | 2589 | out_nofid: |
c7b4b0b3 MK |
2590 | return err; |
2591 | } | |
2592 | ||
532decb7 | 2593 | /* Only works with path name based fid */ |
8440e22e | 2594 | static void coroutine_fn v9fs_rename(void *opaque) |
c7b4b0b3 MK |
2595 | { |
2596 | int32_t fid; | |
c7b4b0b3 | 2597 | ssize_t err = 0; |
930b1e17 AK |
2598 | size_t offset = 7; |
2599 | V9fsString name; | |
2600 | int32_t newdirfid; | |
2601 | V9fsFidState *fidp; | |
2602 | V9fsPDU *pdu = opaque; | |
2603 | V9fsState *s = pdu->s; | |
c7b4b0b3 | 2604 | |
ddca7f86 MK |
2605 | v9fs_string_init(&name); |
2606 | err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); | |
2607 | if (err < 0) { | |
2608 | goto out_nofid; | |
2609 | } | |
fff39a7a GK |
2610 | |
2611 | if (name_is_illegal(name.data)) { | |
2612 | err = -ENOENT; | |
2613 | goto out_nofid; | |
2614 | } | |
2615 | ||
805b5d98 GK |
2616 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2617 | err = -EISDIR; | |
2618 | goto out_nofid; | |
2619 | } | |
2620 | ||
bccacf6c | 2621 | fidp = get_fid(pdu, fid); |
930b1e17 | 2622 | if (fidp == NULL) { |
c7b4b0b3 | 2623 | err = -ENOENT; |
84dfb926 | 2624 | goto out_nofid; |
c7b4b0b3 | 2625 | } |
930b1e17 | 2626 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
532decb7 | 2627 | /* if fs driver is not path based, return EOPNOTSUPP */ |
c98f1d4a | 2628 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { |
532decb7 AK |
2629 | err = -EOPNOTSUPP; |
2630 | goto out; | |
2631 | } | |
2632 | v9fs_path_write_lock(s); | |
bccacf6c | 2633 | err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); |
532decb7 | 2634 | v9fs_path_unlock(s); |
930b1e17 AK |
2635 | if (!err) { |
2636 | err = offset; | |
2637 | } | |
532decb7 | 2638 | out: |
bccacf6c | 2639 | put_fid(pdu, fidp); |
84dfb926 | 2640 | out_nofid: |
dc295f83 | 2641 | pdu_complete(pdu, err); |
930b1e17 | 2642 | v9fs_string_free(&name); |
c7b4b0b3 MK |
2643 | } |
2644 | ||
8440e22e GK |
2645 | static void coroutine_fn v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, |
2646 | V9fsString *old_name, | |
2647 | V9fsPath *newdir, | |
2648 | V9fsString *new_name) | |
2289be19 AK |
2649 | { |
2650 | V9fsFidState *tfidp; | |
2651 | V9fsPath oldpath, newpath; | |
bccacf6c | 2652 | V9fsState *s = pdu->s; |
2289be19 AK |
2653 | |
2654 | ||
2655 | v9fs_path_init(&oldpath); | |
2656 | v9fs_path_init(&newpath); | |
bccacf6c AK |
2657 | v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); |
2658 | v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); | |
2289be19 AK |
2659 | |
2660 | /* | |
2661 | * Fixup fid's pointing to the old name to | |
2662 | * start pointing to the new name | |
2663 | */ | |
2664 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
2665 | if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { | |
2666 | /* replace the name */ | |
2667 | v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); | |
2668 | } | |
2669 | } | |
2670 | v9fs_path_free(&oldpath); | |
2671 | v9fs_path_free(&newpath); | |
2672 | } | |
2673 | ||
8440e22e GK |
2674 | static int coroutine_fn v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, |
2675 | V9fsString *old_name, | |
2676 | int32_t newdirfid, | |
2677 | V9fsString *new_name) | |
89bf6593 AK |
2678 | { |
2679 | int err = 0; | |
bccacf6c | 2680 | V9fsState *s = pdu->s; |
89bf6593 AK |
2681 | V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; |
2682 | ||
bccacf6c | 2683 | olddirfidp = get_fid(pdu, olddirfid); |
89bf6593 AK |
2684 | if (olddirfidp == NULL) { |
2685 | err = -ENOENT; | |
2686 | goto out; | |
2687 | } | |
89bf6593 | 2688 | if (newdirfid != -1) { |
bccacf6c | 2689 | newdirfidp = get_fid(pdu, newdirfid); |
89bf6593 AK |
2690 | if (newdirfidp == NULL) { |
2691 | err = -ENOENT; | |
2692 | goto out; | |
2693 | } | |
89bf6593 | 2694 | } else { |
bccacf6c | 2695 | newdirfidp = get_fid(pdu, olddirfid); |
89bf6593 AK |
2696 | } |
2697 | ||
bccacf6c | 2698 | err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, |
2289be19 AK |
2699 | &newdirfidp->path, new_name); |
2700 | if (err < 0) { | |
2701 | goto out; | |
89bf6593 | 2702 | } |
c98f1d4a | 2703 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { |
532decb7 | 2704 | /* Only for path based fid we need to do the below fixup */ |
bccacf6c | 2705 | v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, |
532decb7 AK |
2706 | &newdirfidp->path, new_name); |
2707 | } | |
89bf6593 AK |
2708 | out: |
2709 | if (olddirfidp) { | |
bccacf6c | 2710 | put_fid(pdu, olddirfidp); |
89bf6593 AK |
2711 | } |
2712 | if (newdirfidp) { | |
bccacf6c | 2713 | put_fid(pdu, newdirfidp); |
89bf6593 | 2714 | } |
89bf6593 AK |
2715 | return err; |
2716 | } | |
2717 | ||
8440e22e | 2718 | static void coroutine_fn v9fs_renameat(void *opaque) |
89bf6593 AK |
2719 | { |
2720 | ssize_t err = 0; | |
2721 | size_t offset = 7; | |
2722 | V9fsPDU *pdu = opaque; | |
2723 | V9fsState *s = pdu->s; | |
2724 | int32_t olddirfid, newdirfid; | |
2725 | V9fsString old_name, new_name; | |
2726 | ||
ddca7f86 MK |
2727 | v9fs_string_init(&old_name); |
2728 | v9fs_string_init(&new_name); | |
2729 | err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, | |
2730 | &old_name, &newdirfid, &new_name); | |
2731 | if (err < 0) { | |
2732 | goto out_err; | |
2733 | } | |
89bf6593 | 2734 | |
fff39a7a GK |
2735 | if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { |
2736 | err = -ENOENT; | |
2737 | goto out_err; | |
2738 | } | |
2739 | ||
805b5d98 GK |
2740 | if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || |
2741 | !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { | |
2742 | err = -EISDIR; | |
2743 | goto out_err; | |
2744 | } | |
2745 | ||
532decb7 | 2746 | v9fs_path_write_lock(s); |
bccacf6c AK |
2747 | err = v9fs_complete_renameat(pdu, olddirfid, |
2748 | &old_name, newdirfid, &new_name); | |
532decb7 | 2749 | v9fs_path_unlock(s); |
89bf6593 AK |
2750 | if (!err) { |
2751 | err = offset; | |
2752 | } | |
ddca7f86 MK |
2753 | |
2754 | out_err: | |
dc295f83 | 2755 | pdu_complete(pdu, err); |
89bf6593 AK |
2756 | v9fs_string_free(&old_name); |
2757 | v9fs_string_free(&new_name); | |
2758 | } | |
2759 | ||
8440e22e | 2760 | static void coroutine_fn v9fs_wstat(void *opaque) |
8cf89e00 | 2761 | { |
b81d685e AK |
2762 | int32_t fid; |
2763 | int err = 0; | |
2764 | int16_t unused; | |
2765 | V9fsStat v9stat; | |
2766 | size_t offset = 7; | |
2767 | struct stat stbuf; | |
2768 | V9fsFidState *fidp; | |
2769 | V9fsPDU *pdu = opaque; | |
8cf89e00 | 2770 | |
ddca7f86 MK |
2771 | v9fs_stat_init(&v9stat); |
2772 | err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); | |
2773 | if (err < 0) { | |
2774 | goto out_nofid; | |
2775 | } | |
c572f23a HPB |
2776 | trace_v9fs_wstat(pdu->tag, pdu->id, fid, |
2777 | v9stat.mode, v9stat.atime, v9stat.mtime); | |
84dfb926 | 2778 | |
bccacf6c | 2779 | fidp = get_fid(pdu, fid); |
b81d685e AK |
2780 | if (fidp == NULL) { |
2781 | err = -EINVAL; | |
84dfb926 | 2782 | goto out_nofid; |
8cf89e00 | 2783 | } |
b81d685e AK |
2784 | /* do we need to sync the file? */ |
2785 | if (donttouch_stat(&v9stat)) { | |
bccacf6c | 2786 | err = v9fs_co_fsync(pdu, fidp, 0); |
8cf89e00 AL |
2787 | goto out; |
2788 | } | |
b81d685e AK |
2789 | if (v9stat.mode != -1) { |
2790 | uint32_t v9_mode; | |
bccacf6c | 2791 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
b81d685e AK |
2792 | if (err < 0) { |
2793 | goto out; | |
2794 | } | |
2795 | v9_mode = stat_to_v9mode(&stbuf); | |
2796 | if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2797 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2798 | /* Attempting to change the type */ | |
2799 | err = -EIO; | |
2800 | goto out; | |
2801 | } | |
bccacf6c | 2802 | err = v9fs_co_chmod(pdu, &fidp->path, |
b81d685e AK |
2803 | v9mode_to_mode(v9stat.mode, |
2804 | &v9stat.extension)); | |
2805 | if (err < 0) { | |
2806 | goto out; | |
2807 | } | |
2808 | } | |
2809 | if (v9stat.mtime != -1 || v9stat.atime != -1) { | |
8fc39ae4 | 2810 | struct timespec times[2]; |
b81d685e AK |
2811 | if (v9stat.atime != -1) { |
2812 | times[0].tv_sec = v9stat.atime; | |
8fc39ae4 SK |
2813 | times[0].tv_nsec = 0; |
2814 | } else { | |
2815 | times[0].tv_nsec = UTIME_OMIT; | |
2816 | } | |
b81d685e AK |
2817 | if (v9stat.mtime != -1) { |
2818 | times[1].tv_sec = v9stat.mtime; | |
8fc39ae4 SK |
2819 | times[1].tv_nsec = 0; |
2820 | } else { | |
2821 | times[1].tv_nsec = UTIME_OMIT; | |
2822 | } | |
bccacf6c | 2823 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
b81d685e AK |
2824 | if (err < 0) { |
2825 | goto out; | |
8cf89e00 AL |
2826 | } |
2827 | } | |
b81d685e | 2828 | if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { |
bccacf6c | 2829 | err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); |
b81d685e | 2830 | if (err < 0) { |
8cf89e00 | 2831 | goto out; |
b81d685e | 2832 | } |
8cf89e00 | 2833 | } |
b81d685e | 2834 | if (v9stat.name.size != 0) { |
bccacf6c | 2835 | err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); |
b81d685e AK |
2836 | if (err < 0) { |
2837 | goto out; | |
2838 | } | |
8cf89e00 | 2839 | } |
b81d685e | 2840 | if (v9stat.length != -1) { |
bccacf6c | 2841 | err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); |
b81d685e AK |
2842 | if (err < 0) { |
2843 | goto out; | |
2844 | } | |
8cf89e00 | 2845 | } |
b81d685e | 2846 | err = offset; |
8cf89e00 | 2847 | out: |
bccacf6c | 2848 | put_fid(pdu, fidp); |
84dfb926 | 2849 | out_nofid: |
b81d685e | 2850 | v9fs_stat_free(&v9stat); |
dc295f83 | 2851 | pdu_complete(pdu, err); |
9f107513 AL |
2852 | } |
2853 | ||
88a4763e AK |
2854 | static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
2855 | { | |
2856 | uint32_t f_type; | |
2857 | uint32_t f_bsize; | |
2858 | uint64_t f_blocks; | |
2859 | uint64_t f_bfree; | |
2860 | uint64_t f_bavail; | |
2861 | uint64_t f_files; | |
2862 | uint64_t f_ffree; | |
2863 | uint64_t fsid_val; | |
2864 | uint32_t f_namelen; | |
2865 | size_t offset = 7; | |
5e94c103 MK |
2866 | int32_t bsize_factor; |
2867 | ||
5e94c103 MK |
2868 | /* |
2869 | * compute bsize factor based on host file system block size | |
2870 | * and client msize | |
2871 | */ | |
88a4763e | 2872 | bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
5e94c103 MK |
2873 | if (!bsize_factor) { |
2874 | bsize_factor = 1; | |
2875 | } | |
88a4763e AK |
2876 | f_type = stbuf->f_type; |
2877 | f_bsize = stbuf->f_bsize; | |
2878 | f_bsize *= bsize_factor; | |
5e94c103 MK |
2879 | /* |
2880 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
2881 | * adjust(divide) the number of blocks, free blocks and available | |
2882 | * blocks by bsize factor | |
2883 | */ | |
88a4763e AK |
2884 | f_blocks = stbuf->f_blocks/bsize_factor; |
2885 | f_bfree = stbuf->f_bfree/bsize_factor; | |
2886 | f_bavail = stbuf->f_bavail/bsize_factor; | |
2887 | f_files = stbuf->f_files; | |
2888 | f_ffree = stbuf->f_ffree; | |
2889 | fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | | |
2890 | (unsigned long long)stbuf->f_fsid.__val[1] << 32; | |
2891 | f_namelen = stbuf->f_namelen; | |
be940c87 | 2892 | |
88a4763e AK |
2893 | return pdu_marshal(pdu, offset, "ddqqqqqqd", |
2894 | f_type, f_bsize, f_blocks, f_bfree, | |
2895 | f_bavail, f_files, f_ffree, | |
2896 | fsid_val, f_namelen); | |
be940c87 MK |
2897 | } |
2898 | ||
8440e22e | 2899 | static void coroutine_fn v9fs_statfs(void *opaque) |
be940c87 | 2900 | { |
88a4763e AK |
2901 | int32_t fid; |
2902 | ssize_t retval = 0; | |
2903 | size_t offset = 7; | |
2904 | V9fsFidState *fidp; | |
2905 | struct statfs stbuf; | |
ff06030f VJ |
2906 | V9fsPDU *pdu = opaque; |
2907 | V9fsState *s = pdu->s; | |
be940c87 | 2908 | |
ddca7f86 MK |
2909 | retval = pdu_unmarshal(pdu, offset, "d", &fid); |
2910 | if (retval < 0) { | |
2911 | goto out_nofid; | |
2912 | } | |
bccacf6c | 2913 | fidp = get_fid(pdu, fid); |
88a4763e AK |
2914 | if (fidp == NULL) { |
2915 | retval = -ENOENT; | |
84dfb926 | 2916 | goto out_nofid; |
be940c87 | 2917 | } |
bccacf6c | 2918 | retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); |
88a4763e AK |
2919 | if (retval < 0) { |
2920 | goto out; | |
2921 | } | |
ddca7f86 MK |
2922 | retval = v9fs_fill_statfs(s, pdu, &stbuf); |
2923 | if (retval < 0) { | |
2924 | goto out; | |
2925 | } | |
2926 | retval += offset; | |
be940c87 | 2927 | out: |
bccacf6c | 2928 | put_fid(pdu, fidp); |
84dfb926 | 2929 | out_nofid: |
dc295f83 | 2930 | pdu_complete(pdu, retval); |
be940c87 MK |
2931 | } |
2932 | ||
8440e22e | 2933 | static void coroutine_fn v9fs_mknod(void *opaque) |
5268cecc | 2934 | { |
1b733fed AK |
2935 | |
2936 | int mode; | |
2937 | gid_t gid; | |
5268cecc | 2938 | int32_t fid; |
1b733fed | 2939 | V9fsQID qid; |
5268cecc | 2940 | int err = 0; |
5268cecc | 2941 | int major, minor; |
1b733fed AK |
2942 | size_t offset = 7; |
2943 | V9fsString name; | |
2944 | struct stat stbuf; | |
1b733fed AK |
2945 | V9fsFidState *fidp; |
2946 | V9fsPDU *pdu = opaque; | |
5268cecc | 2947 | |
ddca7f86 MK |
2948 | v9fs_string_init(&name); |
2949 | err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, | |
2950 | &major, &minor, &gid); | |
2951 | if (err < 0) { | |
2952 | goto out_nofid; | |
2953 | } | |
c572f23a | 2954 | trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); |
5268cecc | 2955 | |
fff39a7a GK |
2956 | if (name_is_illegal(name.data)) { |
2957 | err = -ENOENT; | |
2958 | goto out_nofid; | |
2959 | } | |
2960 | ||
805b5d98 GK |
2961 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2962 | err = -EEXIST; | |
2963 | goto out_nofid; | |
2964 | } | |
2965 | ||
bccacf6c | 2966 | fidp = get_fid(pdu, fid); |
5268cecc MK |
2967 | if (fidp == NULL) { |
2968 | err = -ENOENT; | |
84dfb926 | 2969 | goto out_nofid; |
5268cecc | 2970 | } |
bccacf6c | 2971 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, |
02cb7f3a | 2972 | makedev(major, minor), mode, &stbuf); |
1b733fed AK |
2973 | if (err < 0) { |
2974 | goto out; | |
2975 | } | |
2976 | stat_to_qid(&stbuf, &qid); | |
ddca7f86 MK |
2977 | err = pdu_marshal(pdu, offset, "Q", &qid); |
2978 | if (err < 0) { | |
2979 | goto out; | |
2980 | } | |
2981 | err += offset; | |
7999f7e1 AK |
2982 | trace_v9fs_mknod_return(pdu->tag, pdu->id, |
2983 | qid.type, qid.version, qid.path); | |
5268cecc | 2984 | out: |
bccacf6c | 2985 | put_fid(pdu, fidp); |
84dfb926 | 2986 | out_nofid: |
dc295f83 | 2987 | pdu_complete(pdu, err); |
1b733fed | 2988 | v9fs_string_free(&name); |
5268cecc MK |
2989 | } |
2990 | ||
82cc3ee8 MK |
2991 | /* |
2992 | * Implement posix byte range locking code | |
2993 | * Server side handling of locking code is very simple, because 9p server in | |
2994 | * QEMU can handle only one client. And most of the lock handling | |
2995 | * (like conflict, merging) etc is done by the VFS layer itself, so no need to | |
2996 | * do any thing in * qemu 9p server side lock code path. | |
2997 | * So when a TLOCK request comes, always return success | |
2998 | */ | |
8440e22e | 2999 | static void coroutine_fn v9fs_lock(void *opaque) |
82cc3ee8 | 3000 | { |
0c27bf2a | 3001 | int8_t status; |
ddca7f86 | 3002 | V9fsFlock flock; |
0c27bf2a AK |
3003 | size_t offset = 7; |
3004 | struct stat stbuf; | |
3005 | V9fsFidState *fidp; | |
3006 | int32_t fid, err = 0; | |
ff06030f | 3007 | V9fsPDU *pdu = opaque; |
82cc3ee8 | 3008 | |
ddca7f86 MK |
3009 | status = P9_LOCK_ERROR; |
3010 | v9fs_string_init(&flock.client_id); | |
3011 | err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, | |
3012 | &flock.flags, &flock.start, &flock.length, | |
3013 | &flock.proc_id, &flock.client_id); | |
3014 | if (err < 0) { | |
3015 | goto out_nofid; | |
3016 | } | |
c572f23a | 3017 | trace_v9fs_lock(pdu->tag, pdu->id, fid, |
ddca7f86 | 3018 | flock.type, flock.start, flock.length); |
c572f23a | 3019 | |
82cc3ee8 MK |
3020 | |
3021 | /* We support only block flag now (that too ignored currently) */ | |
ddca7f86 | 3022 | if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { |
82cc3ee8 | 3023 | err = -EINVAL; |
84dfb926 | 3024 | goto out_nofid; |
82cc3ee8 | 3025 | } |
bccacf6c | 3026 | fidp = get_fid(pdu, fid); |
0c27bf2a | 3027 | if (fidp == NULL) { |
82cc3ee8 | 3028 | err = -ENOENT; |
84dfb926 | 3029 | goto out_nofid; |
82cc3ee8 | 3030 | } |
cc720ddb | 3031 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
82cc3ee8 | 3032 | if (err < 0) { |
82cc3ee8 MK |
3033 | goto out; |
3034 | } | |
0c27bf2a | 3035 | status = P9_LOCK_SUCCESS; |
82cc3ee8 | 3036 | out: |
bccacf6c | 3037 | put_fid(pdu, fidp); |
84dfb926 | 3038 | out_nofid: |
ddca7f86 MK |
3039 | err = pdu_marshal(pdu, offset, "b", status); |
3040 | if (err > 0) { | |
3041 | err += offset; | |
3042 | } | |
c572f23a | 3043 | trace_v9fs_lock_return(pdu->tag, pdu->id, status); |
dc295f83 | 3044 | pdu_complete(pdu, err); |
ddca7f86 | 3045 | v9fs_string_free(&flock.client_id); |
82cc3ee8 MK |
3046 | } |
3047 | ||
8f354003 MK |
3048 | /* |
3049 | * When a TGETLOCK request comes, always return success because all lock | |
3050 | * handling is done by client's VFS layer. | |
3051 | */ | |
8440e22e | 3052 | static void coroutine_fn v9fs_getlock(void *opaque) |
8f354003 | 3053 | { |
e4e414a4 AK |
3054 | size_t offset = 7; |
3055 | struct stat stbuf; | |
3056 | V9fsFidState *fidp; | |
ddca7f86 | 3057 | V9fsGetlock glock; |
e4e414a4 | 3058 | int32_t fid, err = 0; |
ff06030f | 3059 | V9fsPDU *pdu = opaque; |
8f354003 | 3060 | |
ddca7f86 MK |
3061 | v9fs_string_init(&glock.client_id); |
3062 | err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, | |
3063 | &glock.start, &glock.length, &glock.proc_id, | |
3064 | &glock.client_id); | |
3065 | if (err < 0) { | |
3066 | goto out_nofid; | |
3067 | } | |
c572f23a | 3068 | trace_v9fs_getlock(pdu->tag, pdu->id, fid, |
ddca7f86 | 3069 | glock.type, glock.start, glock.length); |
c572f23a | 3070 | |
bccacf6c | 3071 | fidp = get_fid(pdu, fid); |
e4e414a4 | 3072 | if (fidp == NULL) { |
8f354003 | 3073 | err = -ENOENT; |
84dfb926 | 3074 | goto out_nofid; |
8f354003 | 3075 | } |
cc720ddb | 3076 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
8f354003 | 3077 | if (err < 0) { |
8f354003 MK |
3078 | goto out; |
3079 | } | |
ddca7f86 MK |
3080 | glock.type = P9_LOCK_TYPE_UNLCK; |
3081 | err = pdu_marshal(pdu, offset, "bqqds", glock.type, | |
3082 | glock.start, glock.length, glock.proc_id, | |
3083 | &glock.client_id); | |
3084 | if (err < 0) { | |
3085 | goto out; | |
3086 | } | |
3087 | err += offset; | |
3088 | trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, | |
3089 | glock.length, glock.proc_id); | |
8f354003 | 3090 | out: |
bccacf6c | 3091 | put_fid(pdu, fidp); |
84dfb926 | 3092 | out_nofid: |
dc295f83 | 3093 | pdu_complete(pdu, err); |
ddca7f86 | 3094 | v9fs_string_free(&glock.client_id); |
8f354003 MK |
3095 | } |
3096 | ||
8440e22e | 3097 | static void coroutine_fn v9fs_mkdir(void *opaque) |
b67592ea | 3098 | { |
ff06030f | 3099 | V9fsPDU *pdu = opaque; |
e84861f7 | 3100 | size_t offset = 7; |
b67592ea | 3101 | int32_t fid; |
e84861f7 | 3102 | struct stat stbuf; |
e84861f7 | 3103 | V9fsQID qid; |
02cb7f3a | 3104 | V9fsString name; |
b67592ea MK |
3105 | V9fsFidState *fidp; |
3106 | gid_t gid; | |
3107 | int mode; | |
e84861f7 | 3108 | int err = 0; |
b67592ea | 3109 | |
ddca7f86 MK |
3110 | v9fs_string_init(&name); |
3111 | err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); | |
3112 | if (err < 0) { | |
3113 | goto out_nofid; | |
3114 | } | |
c572f23a HPB |
3115 | trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); |
3116 | ||
fff39a7a GK |
3117 | if (name_is_illegal(name.data)) { |
3118 | err = -ENOENT; | |
3119 | goto out_nofid; | |
3120 | } | |
3121 | ||
805b5d98 GK |
3122 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
3123 | err = -EEXIST; | |
3124 | goto out_nofid; | |
3125 | } | |
3126 | ||
bccacf6c | 3127 | fidp = get_fid(pdu, fid); |
b67592ea MK |
3128 | if (fidp == NULL) { |
3129 | err = -ENOENT; | |
84dfb926 | 3130 | goto out_nofid; |
b67592ea | 3131 | } |
bccacf6c | 3132 | err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); |
e84861f7 VJ |
3133 | if (err < 0) { |
3134 | goto out; | |
3135 | } | |
3136 | stat_to_qid(&stbuf, &qid); | |
ddca7f86 MK |
3137 | err = pdu_marshal(pdu, offset, "Q", &qid); |
3138 | if (err < 0) { | |
3139 | goto out; | |
3140 | } | |
3141 | err += offset; | |
7999f7e1 AK |
3142 | trace_v9fs_mkdir_return(pdu->tag, pdu->id, |
3143 | qid.type, qid.version, qid.path, err); | |
b67592ea | 3144 | out: |
bccacf6c | 3145 | put_fid(pdu, fidp); |
84dfb926 | 3146 | out_nofid: |
dc295f83 | 3147 | pdu_complete(pdu, err); |
e84861f7 | 3148 | v9fs_string_free(&name); |
b67592ea MK |
3149 | } |
3150 | ||
8440e22e | 3151 | static void coroutine_fn v9fs_xattrwalk(void *opaque) |
fa32ef88 | 3152 | { |
670185a6 AK |
3153 | int64_t size; |
3154 | V9fsString name; | |
fa32ef88 | 3155 | ssize_t err = 0; |
670185a6 | 3156 | size_t offset = 7; |
fa32ef88 | 3157 | int32_t fid, newfid; |
670185a6 | 3158 | V9fsFidState *file_fidp; |
84dfb926 | 3159 | V9fsFidState *xattr_fidp = NULL; |
670185a6 AK |
3160 | V9fsPDU *pdu = opaque; |
3161 | V9fsState *s = pdu->s; | |
fa32ef88 | 3162 | |
ddca7f86 MK |
3163 | v9fs_string_init(&name); |
3164 | err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); | |
3165 | if (err < 0) { | |
3166 | goto out_nofid; | |
3167 | } | |
c572f23a HPB |
3168 | trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); |
3169 | ||
bccacf6c | 3170 | file_fidp = get_fid(pdu, fid); |
670185a6 | 3171 | if (file_fidp == NULL) { |
fa32ef88 | 3172 | err = -ENOENT; |
84dfb926 | 3173 | goto out_nofid; |
fa32ef88 | 3174 | } |
670185a6 AK |
3175 | xattr_fidp = alloc_fid(s, newfid); |
3176 | if (xattr_fidp == NULL) { | |
fa32ef88 AK |
3177 | err = -EINVAL; |
3178 | goto out; | |
3179 | } | |
2289be19 | 3180 | v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); |
ba42ebb8 | 3181 | if (!v9fs_string_size(&name)) { |
fa32ef88 AK |
3182 | /* |
3183 | * listxattr request. Get the size first | |
3184 | */ | |
bccacf6c | 3185 | size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); |
670185a6 AK |
3186 | if (size < 0) { |
3187 | err = size; | |
84dfb926 | 3188 | clunk_fid(s, xattr_fidp->fid); |
670185a6 | 3189 | goto out; |
fa32ef88 | 3190 | } |
670185a6 AK |
3191 | /* |
3192 | * Read the xattr value | |
3193 | */ | |
3194 | xattr_fidp->fs.xattr.len = size; | |
3195 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3196 | xattr_fidp->fs.xattr.copied_len = -1; | |
3197 | if (size) { | |
7267c094 | 3198 | xattr_fidp->fs.xattr.value = g_malloc(size); |
bccacf6c | 3199 | err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3200 | xattr_fidp->fs.xattr.value, |
3201 | xattr_fidp->fs.xattr.len); | |
3202 | if (err < 0) { | |
84dfb926 | 3203 | clunk_fid(s, xattr_fidp->fid); |
670185a6 AK |
3204 | goto out; |
3205 | } | |
3206 | } | |
ddca7f86 MK |
3207 | err = pdu_marshal(pdu, offset, "q", size); |
3208 | if (err < 0) { | |
3209 | goto out; | |
3210 | } | |
3211 | err += offset; | |
fa32ef88 AK |
3212 | } else { |
3213 | /* | |
3214 | * specific xattr fid. We check for xattr | |
3215 | * presence also collect the xattr size | |
3216 | */ | |
bccacf6c | 3217 | size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3218 | &name, NULL, 0); |
3219 | if (size < 0) { | |
3220 | err = size; | |
84dfb926 | 3221 | clunk_fid(s, xattr_fidp->fid); |
670185a6 | 3222 | goto out; |
fa32ef88 | 3223 | } |
670185a6 AK |
3224 | /* |
3225 | * Read the xattr value | |
3226 | */ | |
3227 | xattr_fidp->fs.xattr.len = size; | |
3228 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3229 | xattr_fidp->fs.xattr.copied_len = -1; | |
3230 | if (size) { | |
7267c094 | 3231 | xattr_fidp->fs.xattr.value = g_malloc(size); |
bccacf6c | 3232 | err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3233 | &name, xattr_fidp->fs.xattr.value, |
3234 | xattr_fidp->fs.xattr.len); | |
3235 | if (err < 0) { | |
84dfb926 | 3236 | clunk_fid(s, xattr_fidp->fid); |
670185a6 AK |
3237 | goto out; |
3238 | } | |
3239 | } | |
ddca7f86 MK |
3240 | err = pdu_marshal(pdu, offset, "q", size); |
3241 | if (err < 0) { | |
3242 | goto out; | |
3243 | } | |
3244 | err += offset; | |
fa32ef88 | 3245 | } |
7999f7e1 | 3246 | trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); |
fa32ef88 | 3247 | out: |
bccacf6c | 3248 | put_fid(pdu, file_fidp); |
84dfb926 | 3249 | if (xattr_fidp) { |
bccacf6c | 3250 | put_fid(pdu, xattr_fidp); |
84dfb926 AK |
3251 | } |
3252 | out_nofid: | |
dc295f83 | 3253 | pdu_complete(pdu, err); |
670185a6 | 3254 | v9fs_string_free(&name); |
fa32ef88 AK |
3255 | } |
3256 | ||
8440e22e | 3257 | static void coroutine_fn v9fs_xattrcreate(void *opaque) |
10b468bd AK |
3258 | { |
3259 | int flags; | |
3260 | int32_t fid; | |
f10ff58d | 3261 | int64_t size; |
10b468bd | 3262 | ssize_t err = 0; |
f10ff58d AK |
3263 | V9fsString name; |
3264 | size_t offset = 7; | |
3265 | V9fsFidState *file_fidp; | |
3266 | V9fsFidState *xattr_fidp; | |
3267 | V9fsPDU *pdu = opaque; | |
10b468bd | 3268 | |
ddca7f86 MK |
3269 | v9fs_string_init(&name); |
3270 | err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); | |
3271 | if (err < 0) { | |
3272 | goto out_nofid; | |
3273 | } | |
c572f23a | 3274 | trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); |
10b468bd | 3275 | |
bccacf6c | 3276 | file_fidp = get_fid(pdu, fid); |
f10ff58d | 3277 | if (file_fidp == NULL) { |
10b468bd | 3278 | err = -EINVAL; |
84dfb926 | 3279 | goto out_nofid; |
10b468bd | 3280 | } |
10b468bd | 3281 | /* Make the file fid point to xattr */ |
f10ff58d AK |
3282 | xattr_fidp = file_fidp; |
3283 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3284 | xattr_fidp->fs.xattr.copied_len = 0; | |
3285 | xattr_fidp->fs.xattr.len = size; | |
3286 | xattr_fidp->fs.xattr.flags = flags; | |
3287 | v9fs_string_init(&xattr_fidp->fs.xattr.name); | |
3288 | v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); | |
6528499f | 3289 | xattr_fidp->fs.xattr.value = g_malloc(size); |
f10ff58d | 3290 | err = offset; |
bccacf6c | 3291 | put_fid(pdu, file_fidp); |
84dfb926 | 3292 | out_nofid: |
dc295f83 | 3293 | pdu_complete(pdu, err); |
f10ff58d | 3294 | v9fs_string_free(&name); |
10b468bd | 3295 | } |
fa32ef88 | 3296 | |
8440e22e | 3297 | static void coroutine_fn v9fs_readlink(void *opaque) |
df0973a4 | 3298 | { |
ff06030f | 3299 | V9fsPDU *pdu = opaque; |
7a5ca31e VJ |
3300 | size_t offset = 7; |
3301 | V9fsString target; | |
df0973a4 | 3302 | int32_t fid; |
df0973a4 MK |
3303 | int err = 0; |
3304 | V9fsFidState *fidp; | |
3305 | ||
ddca7f86 MK |
3306 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
3307 | if (err < 0) { | |
3308 | goto out_nofid; | |
3309 | } | |
c572f23a | 3310 | trace_v9fs_readlink(pdu->tag, pdu->id, fid); |
bccacf6c | 3311 | fidp = get_fid(pdu, fid); |
df0973a4 MK |
3312 | if (fidp == NULL) { |
3313 | err = -ENOENT; | |
84dfb926 | 3314 | goto out_nofid; |
df0973a4 MK |
3315 | } |
3316 | ||
7a5ca31e | 3317 | v9fs_string_init(&target); |
bccacf6c | 3318 | err = v9fs_co_readlink(pdu, &fidp->path, &target); |
7a5ca31e VJ |
3319 | if (err < 0) { |
3320 | goto out; | |
3321 | } | |
ddca7f86 MK |
3322 | err = pdu_marshal(pdu, offset, "s", &target); |
3323 | if (err < 0) { | |
3324 | v9fs_string_free(&target); | |
3325 | goto out; | |
3326 | } | |
3327 | err += offset; | |
7999f7e1 | 3328 | trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); |
7a5ca31e | 3329 | v9fs_string_free(&target); |
df0973a4 | 3330 | out: |
bccacf6c | 3331 | put_fid(pdu, fidp); |
84dfb926 | 3332 | out_nofid: |
dc295f83 | 3333 | pdu_complete(pdu, err); |
df0973a4 MK |
3334 | } |
3335 | ||
ff06030f | 3336 | static CoroutineEntry *pdu_co_handlers[] = { |
c18e2f94 | 3337 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 3338 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 3339 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 3340 | [P9_TSETATTR] = v9fs_setattr, |
fa32ef88 | 3341 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
10b468bd | 3342 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
5268cecc | 3343 | [P9_TMKNOD] = v9fs_mknod, |
c7b4b0b3 | 3344 | [P9_TRENAME] = v9fs_rename, |
82cc3ee8 | 3345 | [P9_TLOCK] = v9fs_lock, |
8f354003 | 3346 | [P9_TGETLOCK] = v9fs_getlock, |
89bf6593 | 3347 | [P9_TRENAMEAT] = v9fs_renameat, |
df0973a4 | 3348 | [P9_TREADLINK] = v9fs_readlink, |
7834cf77 | 3349 | [P9_TUNLINKAT] = v9fs_unlinkat, |
b67592ea | 3350 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 | 3351 | [P9_TVERSION] = v9fs_version, |
771e9d4c | 3352 | [P9_TLOPEN] = v9fs_open, |
9f107513 AL |
3353 | [P9_TATTACH] = v9fs_attach, |
3354 | [P9_TSTAT] = v9fs_stat, | |
3355 | [P9_TWALK] = v9fs_walk, | |
3356 | [P9_TCLUNK] = v9fs_clunk, | |
b41e95d3 | 3357 | [P9_TFSYNC] = v9fs_fsync, |
9f107513 AL |
3358 | [P9_TOPEN] = v9fs_open, |
3359 | [P9_TREAD] = v9fs_read, | |
3360 | #if 0 | |
3361 | [P9_TAUTH] = v9fs_auth, | |
3362 | #endif | |
3363 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 3364 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 3365 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 3366 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 3367 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
3368 | [P9_TWRITE] = v9fs_write, |
3369 | [P9_TWSTAT] = v9fs_wstat, | |
3370 | [P9_TREMOVE] = v9fs_remove, | |
3371 | }; | |
3372 | ||
8440e22e | 3373 | static void coroutine_fn v9fs_op_not_supp(void *opaque) |
5c3234c6 | 3374 | { |
ff06030f | 3375 | V9fsPDU *pdu = opaque; |
dc295f83 | 3376 | pdu_complete(pdu, -EOPNOTSUPP); |
5c3234c6 AK |
3377 | } |
3378 | ||
8440e22e | 3379 | static void coroutine_fn v9fs_fs_ro(void *opaque) |
2c74c2cb MK |
3380 | { |
3381 | V9fsPDU *pdu = opaque; | |
dc295f83 | 3382 | pdu_complete(pdu, -EROFS); |
2c74c2cb MK |
3383 | } |
3384 | ||
3385 | static inline bool is_read_only_op(V9fsPDU *pdu) | |
3386 | { | |
3387 | switch (pdu->id) { | |
3388 | case P9_TREADDIR: | |
3389 | case P9_TSTATFS: | |
3390 | case P9_TGETATTR: | |
3391 | case P9_TXATTRWALK: | |
3392 | case P9_TLOCK: | |
3393 | case P9_TGETLOCK: | |
3394 | case P9_TREADLINK: | |
3395 | case P9_TVERSION: | |
3396 | case P9_TLOPEN: | |
3397 | case P9_TATTACH: | |
3398 | case P9_TSTAT: | |
3399 | case P9_TWALK: | |
3400 | case P9_TCLUNK: | |
3401 | case P9_TFSYNC: | |
3402 | case P9_TOPEN: | |
3403 | case P9_TREAD: | |
3404 | case P9_TAUTH: | |
3405 | case P9_TFLUSH: | |
3406 | return 1; | |
3407 | default: | |
3408 | return 0; | |
3409 | } | |
3410 | } | |
3411 | ||
4b311c5f | 3412 | void pdu_submit(V9fsPDU *pdu) |
9f107513 | 3413 | { |
ff06030f VJ |
3414 | Coroutine *co; |
3415 | CoroutineEntry *handler; | |
ad38ce9e | 3416 | V9fsState *s = pdu->s; |
9f107513 | 3417 | |
ff06030f VJ |
3418 | if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || |
3419 | (pdu_co_handlers[pdu->id] == NULL)) { | |
5c3234c6 AK |
3420 | handler = v9fs_op_not_supp; |
3421 | } else { | |
ff06030f | 3422 | handler = pdu_co_handlers[pdu->id]; |
5c3234c6 | 3423 | } |
2c74c2cb MK |
3424 | |
3425 | if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { | |
3426 | handler = v9fs_fs_ro; | |
3427 | } | |
0b8b8753 PB |
3428 | co = qemu_coroutine_create(handler, pdu); |
3429 | qemu_coroutine_enter(co); | |
9f107513 AL |
3430 | } |
3431 | ||
2a0c56aa WL |
3432 | /* Returns 0 on success, 1 on failure. */ |
3433 | int v9fs_device_realize_common(V9fsState *s, Error **errp) | |
3434 | { | |
00588a0a | 3435 | V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); |
2a0c56aa WL |
3436 | int i, len; |
3437 | struct stat stat; | |
3438 | FsDriverEntry *fse; | |
3439 | V9fsPath path; | |
3440 | int rc = 1; | |
3441 | ||
3442 | /* initialize pdu allocator */ | |
3443 | QLIST_INIT(&s->free_list); | |
3444 | QLIST_INIT(&s->active_list); | |
3445 | for (i = 0; i < (MAX_REQ - 1); i++) { | |
00588a0a WL |
3446 | QLIST_INSERT_HEAD(&s->free_list, &v->pdus[i], next); |
3447 | v->pdus[i].s = s; | |
3448 | v->pdus[i].idx = i; | |
2a0c56aa WL |
3449 | } |
3450 | ||
3451 | v9fs_path_init(&path); | |
3452 | ||
3453 | fse = get_fsdev_fsentry(s->fsconf.fsdev_id); | |
3454 | ||
3455 | if (!fse) { | |
3456 | /* We don't have a fsdev identified by fsdev_id */ | |
3457 | error_setg(errp, "9pfs device couldn't find fsdev with the " | |
3458 | "id = %s", | |
3459 | s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); | |
3460 | goto out; | |
3461 | } | |
3462 | ||
3463 | if (!s->fsconf.tag) { | |
3464 | /* we haven't specified a mount_tag */ | |
3465 | error_setg(errp, "fsdev with id %s needs mount_tag arguments", | |
3466 | s->fsconf.fsdev_id); | |
3467 | goto out; | |
3468 | } | |
3469 | ||
3470 | s->ctx.export_flags = fse->export_flags; | |
3471 | s->ctx.fs_root = g_strdup(fse->path); | |
3472 | s->ctx.exops.get_st_gen = NULL; | |
3473 | len = strlen(s->fsconf.tag); | |
3474 | if (len > MAX_TAG_LEN - 1) { | |
3475 | error_setg(errp, "mount tag '%s' (%d bytes) is longer than " | |
3476 | "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); | |
3477 | goto out; | |
3478 | } | |
3479 | ||
3480 | s->tag = g_strdup(s->fsconf.tag); | |
3481 | s->ctx.uid = -1; | |
3482 | ||
3483 | s->ops = fse->ops; | |
3484 | ||
3485 | s->fid_list = NULL; | |
3486 | qemu_co_rwlock_init(&s->rename_lock); | |
3487 | ||
3488 | if (s->ops->init(&s->ctx) < 0) { | |
3489 | error_setg(errp, "9pfs Failed to initialize fs-driver with id:%s" | |
3490 | " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root); | |
3491 | goto out; | |
3492 | } | |
3493 | ||
3494 | /* | |
3495 | * Check details of export path, We need to use fs driver | |
3496 | * call back to do that. Since we are in the init path, we don't | |
3497 | * use co-routines here. | |
3498 | */ | |
3499 | if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { | |
3500 | error_setg(errp, | |
3501 | "error in converting name to path %s", strerror(errno)); | |
3502 | goto out; | |
3503 | } | |
3504 | if (s->ops->lstat(&s->ctx, &path, &stat)) { | |
3505 | error_setg(errp, "share path %s does not exist", fse->path); | |
3506 | goto out; | |
3507 | } else if (!S_ISDIR(stat.st_mode)) { | |
3508 | error_setg(errp, "share path %s is not a directory", fse->path); | |
3509 | goto out; | |
3510 | } | |
3511 | v9fs_path_free(&path); | |
3512 | ||
3513 | rc = 0; | |
3514 | out: | |
3515 | if (rc) { | |
3516 | g_free(s->ctx.fs_root); | |
3517 | g_free(s->tag); | |
3518 | v9fs_path_free(&path); | |
3519 | } | |
3520 | return rc; | |
3521 | } | |
3522 | ||
3523 | void v9fs_device_unrealize_common(V9fsState *s, Error **errp) | |
3524 | { | |
3525 | g_free(s->ctx.fs_root); | |
3526 | g_free(s->tag); | |
3527 | } | |
3528 | ||
72a18977 | 3529 | static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) |
7a462745 AK |
3530 | { |
3531 | struct rlimit rlim; | |
3532 | if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { | |
63325b18 | 3533 | error_report("Failed to get the resource limit"); |
7a462745 AK |
3534 | exit(1); |
3535 | } | |
3536 | open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); | |
3537 | open_fd_rc = rlim.rlim_cur/2; | |
3538 | } |