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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" |
db725815 | 20 | #include "qemu/main-loop.h" |
1de7afc9 | 21 | #include "qemu/sockets.h" |
9f107513 AL |
22 | #include "virtio-9p.h" |
23 | #include "fsdev/qemu-fsdev.h" | |
267ae092 | 24 | #include "9p-xattr.h" |
fe52840c | 25 | #include "coth.h" |
c572f23a | 26 | #include "trace.h" |
795c40b8 | 27 | #include "migration/blocker.h" |
357e2f7f | 28 | #include "sysemu/qtest.h" |
1a6ed33c | 29 | #include "qemu/xxhash.h" |
9f107513 | 30 | |
7a462745 AK |
31 | int open_fd_hw; |
32 | int total_open_fd; | |
33 | static int open_fd_rc; | |
9f107513 | 34 | |
fac4f111 VJ |
35 | enum { |
36 | Oread = 0x00, | |
37 | Owrite = 0x01, | |
38 | Ordwr = 0x02, | |
39 | Oexec = 0x03, | |
40 | Oexcl = 0x04, | |
41 | Otrunc = 0x10, | |
42 | Orexec = 0x20, | |
43 | Orclose = 0x40, | |
44 | Oappend = 0x80, | |
45 | }; | |
46 | ||
75673590 | 47 | static ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
0e2082d9 WL |
48 | { |
49 | ssize_t ret; | |
50 | va_list ap; | |
51 | ||
52 | va_start(ap, fmt); | |
ea83441c | 53 | ret = pdu->s->transport->pdu_vmarshal(pdu, offset, fmt, ap); |
0e2082d9 WL |
54 | va_end(ap); |
55 | ||
56 | return ret; | |
57 | } | |
58 | ||
75673590 | 59 | static ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
0e2082d9 WL |
60 | { |
61 | ssize_t ret; | |
62 | va_list ap; | |
63 | ||
64 | va_start(ap, fmt); | |
ea83441c | 65 | ret = pdu->s->transport->pdu_vunmarshal(pdu, offset, fmt, ap); |
0e2082d9 WL |
66 | va_end(ap); |
67 | ||
68 | return ret; | |
69 | } | |
70 | ||
fac4f111 VJ |
71 | static int omode_to_uflags(int8_t mode) |
72 | { | |
73 | int ret = 0; | |
74 | ||
75 | switch (mode & 3) { | |
76 | case Oread: | |
77 | ret = O_RDONLY; | |
78 | break; | |
79 | case Ordwr: | |
80 | ret = O_RDWR; | |
81 | break; | |
82 | case Owrite: | |
83 | ret = O_WRONLY; | |
84 | break; | |
85 | case Oexec: | |
86 | ret = O_RDONLY; | |
87 | break; | |
88 | } | |
89 | ||
90 | if (mode & Otrunc) { | |
91 | ret |= O_TRUNC; | |
92 | } | |
93 | ||
94 | if (mode & Oappend) { | |
95 | ret |= O_APPEND; | |
96 | } | |
97 | ||
98 | if (mode & Oexcl) { | |
99 | ret |= O_EXCL; | |
100 | } | |
101 | ||
102 | return ret; | |
103 | } | |
104 | ||
8e71b96c | 105 | typedef struct DotlOpenflagMap { |
9844081b MK |
106 | int dotl_flag; |
107 | int open_flag; | |
8e71b96c | 108 | } DotlOpenflagMap; |
9844081b MK |
109 | |
110 | static int dotl_to_open_flags(int flags) | |
111 | { | |
112 | int i; | |
113 | /* | |
114 | * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY | |
115 | * and P9_DOTL_NOACCESS | |
116 | */ | |
117 | int oflags = flags & O_ACCMODE; | |
118 | ||
8e71b96c | 119 | DotlOpenflagMap dotl_oflag_map[] = { |
9844081b MK |
120 | { P9_DOTL_CREATE, O_CREAT }, |
121 | { P9_DOTL_EXCL, O_EXCL }, | |
122 | { P9_DOTL_NOCTTY , O_NOCTTY }, | |
123 | { P9_DOTL_TRUNC, O_TRUNC }, | |
124 | { P9_DOTL_APPEND, O_APPEND }, | |
125 | { P9_DOTL_NONBLOCK, O_NONBLOCK } , | |
126 | { P9_DOTL_DSYNC, O_DSYNC }, | |
127 | { P9_DOTL_FASYNC, FASYNC }, | |
128 | { P9_DOTL_DIRECT, O_DIRECT }, | |
129 | { P9_DOTL_LARGEFILE, O_LARGEFILE }, | |
130 | { P9_DOTL_DIRECTORY, O_DIRECTORY }, | |
131 | { P9_DOTL_NOFOLLOW, O_NOFOLLOW }, | |
132 | { P9_DOTL_NOATIME, O_NOATIME }, | |
133 | { P9_DOTL_SYNC, O_SYNC }, | |
134 | }; | |
135 | ||
136 | for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { | |
137 | if (flags & dotl_oflag_map[i].dotl_flag) { | |
138 | oflags |= dotl_oflag_map[i].open_flag; | |
139 | } | |
140 | } | |
141 | ||
142 | return oflags; | |
143 | } | |
144 | ||
758e8e38 | 145 | void cred_init(FsCred *credp) |
131dcb25 | 146 | { |
758e8e38 VJ |
147 | credp->fc_uid = -1; |
148 | credp->fc_gid = -1; | |
149 | credp->fc_mode = -1; | |
150 | credp->fc_rdev = -1; | |
131dcb25 AL |
151 | } |
152 | ||
d3ab98e6 AK |
153 | static int get_dotl_openflags(V9fsState *s, int oflags) |
154 | { | |
155 | int flags; | |
156 | /* | |
157 | * Filter the client open flags | |
158 | */ | |
9844081b MK |
159 | flags = dotl_to_open_flags(oflags); |
160 | flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); | |
d3ab98e6 AK |
161 | /* |
162 | * Ignore direct disk access hint until the server supports it. | |
163 | */ | |
164 | flags &= ~O_DIRECT; | |
165 | return flags; | |
166 | } | |
167 | ||
2289be19 AK |
168 | void v9fs_path_init(V9fsPath *path) |
169 | { | |
170 | path->data = NULL; | |
171 | path->size = 0; | |
172 | } | |
173 | ||
174 | void v9fs_path_free(V9fsPath *path) | |
175 | { | |
176 | g_free(path->data); | |
177 | path->data = NULL; | |
178 | path->size = 0; | |
179 | } | |
180 | ||
e3e83f2e GK |
181 | |
182 | void GCC_FMT_ATTR(2, 3) | |
183 | v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...) | |
184 | { | |
185 | va_list ap; | |
186 | ||
187 | v9fs_path_free(path); | |
188 | ||
189 | va_start(ap, fmt); | |
190 | /* Bump the size for including terminating NULL */ | |
191 | path->size = g_vasprintf(&path->data, fmt, ap) + 1; | |
192 | va_end(ap); | |
193 | } | |
194 | ||
e446a1eb | 195 | void v9fs_path_copy(V9fsPath *dst, const V9fsPath *src) |
2289be19 | 196 | { |
e446a1eb MAL |
197 | v9fs_path_free(dst); |
198 | dst->size = src->size; | |
199 | dst->data = g_memdup(src->data, src->size); | |
2289be19 AK |
200 | } |
201 | ||
202 | int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, | |
203 | const char *name, V9fsPath *path) | |
204 | { | |
205 | int err; | |
206 | err = s->ops->name_to_path(&s->ctx, dirpath, name, path); | |
207 | if (err < 0) { | |
208 | err = -errno; | |
209 | } | |
210 | return err; | |
211 | } | |
212 | ||
936532a4 MN |
213 | /* |
214 | * Return TRUE if s1 is an ancestor of s2. | |
215 | * | |
216 | * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". | |
217 | * As a special case, We treat s1 as ancestor of s2 if they are same! | |
218 | */ | |
2289be19 | 219 | static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) |
936532a4 | 220 | { |
2289be19 AK |
221 | if (!strncmp(s1->data, s2->data, s1->size - 1)) { |
222 | if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { | |
936532a4 MN |
223 | return 1; |
224 | } | |
225 | } | |
226 | return 0; | |
227 | } | |
228 | ||
a03f7874 AL |
229 | static size_t v9fs_string_size(V9fsString *str) |
230 | { | |
231 | return str->size; | |
232 | } | |
233 | ||
b9cb88b0 AK |
234 | /* |
235 | * returns 0 if fid got re-opened, 1 if not, < 0 on error */ | |
8440e22e | 236 | static int coroutine_fn v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) |
b9cb88b0 AK |
237 | { |
238 | int err = 1; | |
239 | if (f->fid_type == P9_FID_FILE) { | |
240 | if (f->fs.fd == -1) { | |
241 | do { | |
bccacf6c AK |
242 | err = v9fs_co_open(pdu, f, f->open_flags); |
243 | } while (err == -EINTR && !pdu->cancelled); | |
b9cb88b0 AK |
244 | } |
245 | } else if (f->fid_type == P9_FID_DIR) { | |
f314ea4e | 246 | if (f->fs.dir.stream == NULL) { |
b9cb88b0 | 247 | do { |
bccacf6c AK |
248 | err = v9fs_co_opendir(pdu, f); |
249 | } while (err == -EINTR && !pdu->cancelled); | |
b9cb88b0 AK |
250 | } |
251 | } | |
252 | return err; | |
253 | } | |
254 | ||
8440e22e | 255 | static V9fsFidState *coroutine_fn get_fid(V9fsPDU *pdu, int32_t fid) |
286d5652 | 256 | { |
7a462745 | 257 | int err; |
286d5652 | 258 | V9fsFidState *f; |
bccacf6c | 259 | V9fsState *s = pdu->s; |
286d5652 AL |
260 | |
261 | for (f = s->fid_list; f; f = f->next) { | |
84dfb926 | 262 | BUG_ON(f->clunked); |
286d5652 | 263 | if (f->fid == fid) { |
7a462745 AK |
264 | /* |
265 | * Update the fid ref upfront so that | |
266 | * we don't get reclaimed when we yield | |
267 | * in open later. | |
268 | */ | |
84dfb926 | 269 | f->ref++; |
7a462745 AK |
270 | /* |
271 | * check whether we need to reopen the | |
272 | * file. We might have closed the fd | |
273 | * while trying to free up some file | |
274 | * descriptors. | |
275 | */ | |
bccacf6c | 276 | err = v9fs_reopen_fid(pdu, f); |
b9cb88b0 AK |
277 | if (err < 0) { |
278 | f->ref--; | |
279 | return NULL; | |
280 | } | |
7a462745 AK |
281 | /* |
282 | * Mark the fid as referenced so that the LRU | |
283 | * reclaim won't close the file descriptor | |
284 | */ | |
285 | f->flags |= FID_REFERENCED; | |
286d5652 AL |
286 | return f; |
287 | } | |
288 | } | |
286d5652 AL |
289 | return NULL; |
290 | } | |
291 | ||
292 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
293 | { | |
294 | V9fsFidState *f; | |
295 | ||
84dfb926 AK |
296 | for (f = s->fid_list; f; f = f->next) { |
297 | /* If fid is already there return NULL */ | |
298 | BUG_ON(f->clunked); | |
299 | if (f->fid == fid) { | |
300 | return NULL; | |
301 | } | |
286d5652 | 302 | } |
7267c094 | 303 | f = g_malloc0(sizeof(V9fsFidState)); |
286d5652 | 304 | f->fid = fid; |
d62dbb51 | 305 | f->fid_type = P9_FID_NONE; |
84dfb926 | 306 | f->ref = 1; |
7a462745 AK |
307 | /* |
308 | * Mark the fid as referenced so that the LRU | |
309 | * reclaim won't close the file descriptor | |
310 | */ | |
311 | f->flags |= FID_REFERENCED; | |
286d5652 AL |
312 | f->next = s->fid_list; |
313 | s->fid_list = f; | |
314 | ||
7cde47d4 GK |
315 | v9fs_readdir_init(&f->fs.dir); |
316 | v9fs_readdir_init(&f->fs_reclaim.dir); | |
317 | ||
286d5652 AL |
318 | return f; |
319 | } | |
320 | ||
8440e22e | 321 | static int coroutine_fn v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) |
10b468bd AK |
322 | { |
323 | int retval = 0; | |
324 | ||
dd28fbbc | 325 | if (fidp->fs.xattr.xattrwalk_fid) { |
10b468bd AK |
326 | /* getxattr/listxattr fid */ |
327 | goto free_value; | |
328 | } | |
329 | /* | |
330 | * if this is fid for setxattr. clunk should | |
331 | * result in setxattr localcall | |
332 | */ | |
333 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { | |
334 | /* clunk after partial write */ | |
335 | retval = -EINVAL; | |
336 | goto free_out; | |
337 | } | |
9ed3ef26 | 338 | if (fidp->fs.xattr.len) { |
bccacf6c | 339 | retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, |
9ed3ef26 AK |
340 | fidp->fs.xattr.value, |
341 | fidp->fs.xattr.len, | |
342 | fidp->fs.xattr.flags); | |
343 | } else { | |
bccacf6c | 344 | retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); |
9ed3ef26 | 345 | } |
10b468bd AK |
346 | free_out: |
347 | v9fs_string_free(&fidp->fs.xattr.name); | |
348 | free_value: | |
9e288406 | 349 | g_free(fidp->fs.xattr.value); |
10b468bd AK |
350 | return retval; |
351 | } | |
352 | ||
8440e22e | 353 | static int coroutine_fn free_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
286d5652 | 354 | { |
10b468bd | 355 | int retval = 0; |
84dfb926 AK |
356 | |
357 | if (fidp->fid_type == P9_FID_FILE) { | |
7a462745 AK |
358 | /* If we reclaimed the fd no need to close */ |
359 | if (fidp->fs.fd != -1) { | |
cc720ddb | 360 | retval = v9fs_co_close(pdu, &fidp->fs); |
7a462745 | 361 | } |
84dfb926 | 362 | } else if (fidp->fid_type == P9_FID_DIR) { |
f314ea4e | 363 | if (fidp->fs.dir.stream != NULL) { |
cc720ddb | 364 | retval = v9fs_co_closedir(pdu, &fidp->fs); |
95f65511 | 365 | } |
84dfb926 | 366 | } else if (fidp->fid_type == P9_FID_XATTR) { |
bccacf6c | 367 | retval = v9fs_xattr_fid_clunk(pdu, fidp); |
84dfb926 | 368 | } |
2289be19 | 369 | v9fs_path_free(&fidp->path); |
84dfb926 AK |
370 | g_free(fidp); |
371 | return retval; | |
372 | } | |
373 | ||
8440e22e | 374 | static int coroutine_fn put_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
84dfb926 AK |
375 | { |
376 | BUG_ON(!fidp->ref); | |
377 | fidp->ref--; | |
7a462745 AK |
378 | /* |
379 | * Don't free the fid if it is in reclaim list | |
380 | */ | |
84dfb926 | 381 | if (!fidp->ref && fidp->clunked) { |
e9a0152b AK |
382 | if (fidp->fid == pdu->s->root_fid) { |
383 | /* | |
384 | * if the clunked fid is root fid then we | |
385 | * have unmounted the fs on the client side. | |
386 | * delete the migration blocker. Ideally, this | |
387 | * should be hooked to transport close notification | |
388 | */ | |
389 | if (pdu->s->migration_blocker) { | |
390 | migrate_del_blocker(pdu->s->migration_blocker); | |
391 | error_free(pdu->s->migration_blocker); | |
392 | pdu->s->migration_blocker = NULL; | |
393 | } | |
394 | } | |
a911a182 | 395 | return free_fid(pdu, fidp); |
84dfb926 | 396 | } |
a911a182 | 397 | return 0; |
84dfb926 AK |
398 | } |
399 | ||
ce421a19 | 400 | static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) |
84dfb926 | 401 | { |
286d5652 AL |
402 | V9fsFidState **fidpp, *fidp; |
403 | ||
404 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
405 | if ((*fidpp)->fid == fid) { | |
406 | break; | |
407 | } | |
408 | } | |
286d5652 | 409 | if (*fidpp == NULL) { |
ce421a19 | 410 | return NULL; |
286d5652 | 411 | } |
286d5652 AL |
412 | fidp = *fidpp; |
413 | *fidpp = fidp->next; | |
84dfb926 | 414 | fidp->clunked = 1; |
ce421a19 | 415 | return fidp; |
286d5652 AL |
416 | } |
417 | ||
8440e22e | 418 | void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu) |
7a462745 AK |
419 | { |
420 | int reclaim_count = 0; | |
bccacf6c | 421 | V9fsState *s = pdu->s; |
7a462745 AK |
422 | V9fsFidState *f, *reclaim_list = NULL; |
423 | ||
424 | for (f = s->fid_list; f; f = f->next) { | |
425 | /* | |
426 | * Unlink fids cannot be reclaimed. Check | |
427 | * for them and skip them. Also skip fids | |
428 | * currently being operated on. | |
429 | */ | |
430 | if (f->ref || f->flags & FID_NON_RECLAIMABLE) { | |
431 | continue; | |
432 | } | |
433 | /* | |
434 | * if it is a recently referenced fid | |
435 | * we leave the fid untouched and clear the | |
436 | * reference bit. We come back to it later | |
437 | * in the next iteration. (a simple LRU without | |
438 | * moving list elements around) | |
439 | */ | |
440 | if (f->flags & FID_REFERENCED) { | |
441 | f->flags &= ~FID_REFERENCED; | |
442 | continue; | |
443 | } | |
444 | /* | |
445 | * Add fids to reclaim list. | |
446 | */ | |
447 | if (f->fid_type == P9_FID_FILE) { | |
448 | if (f->fs.fd != -1) { | |
449 | /* | |
450 | * Up the reference count so that | |
451 | * a clunk request won't free this fid | |
452 | */ | |
453 | f->ref++; | |
454 | f->rclm_lst = reclaim_list; | |
455 | reclaim_list = f; | |
456 | f->fs_reclaim.fd = f->fs.fd; | |
457 | f->fs.fd = -1; | |
458 | reclaim_count++; | |
459 | } | |
95f65511 | 460 | } else if (f->fid_type == P9_FID_DIR) { |
f314ea4e | 461 | if (f->fs.dir.stream != NULL) { |
95f65511 AK |
462 | /* |
463 | * Up the reference count so that | |
464 | * a clunk request won't free this fid | |
465 | */ | |
466 | f->ref++; | |
467 | f->rclm_lst = reclaim_list; | |
468 | reclaim_list = f; | |
f314ea4e GK |
469 | f->fs_reclaim.dir.stream = f->fs.dir.stream; |
470 | f->fs.dir.stream = NULL; | |
95f65511 AK |
471 | reclaim_count++; |
472 | } | |
7a462745 AK |
473 | } |
474 | if (reclaim_count >= open_fd_rc) { | |
475 | break; | |
476 | } | |
477 | } | |
478 | /* | |
479 | * Now close the fid in reclaim list. Free them if they | |
480 | * are already clunked. | |
481 | */ | |
482 | while (reclaim_list) { | |
483 | f = reclaim_list; | |
484 | reclaim_list = f->rclm_lst; | |
485 | if (f->fid_type == P9_FID_FILE) { | |
cc720ddb | 486 | v9fs_co_close(pdu, &f->fs_reclaim); |
95f65511 | 487 | } else if (f->fid_type == P9_FID_DIR) { |
cc720ddb | 488 | v9fs_co_closedir(pdu, &f->fs_reclaim); |
7a462745 AK |
489 | } |
490 | f->rclm_lst = NULL; | |
491 | /* | |
492 | * Now drop the fid reference, free it | |
493 | * if clunked. | |
494 | */ | |
bccacf6c | 495 | put_fid(pdu, f); |
7a462745 AK |
496 | } |
497 | } | |
498 | ||
8440e22e | 499 | static int coroutine_fn v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) |
7a462745 AK |
500 | { |
501 | int err; | |
bccacf6c | 502 | V9fsState *s = pdu->s; |
7a462745 AK |
503 | V9fsFidState *fidp, head_fid; |
504 | ||
505 | head_fid.next = s->fid_list; | |
506 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2289be19 AK |
507 | if (fidp->path.size != path->size) { |
508 | continue; | |
509 | } | |
510 | if (!memcmp(fidp->path.data, path->data, path->size)) { | |
7a462745 AK |
511 | /* Mark the fid non reclaimable. */ |
512 | fidp->flags |= FID_NON_RECLAIMABLE; | |
b9cb88b0 AK |
513 | |
514 | /* reopen the file/dir if already closed */ | |
bccacf6c | 515 | err = v9fs_reopen_fid(pdu, fidp); |
b9cb88b0 | 516 | if (err < 0) { |
267fcadf | 517 | return err; |
b9cb88b0 AK |
518 | } |
519 | /* | |
520 | * Go back to head of fid list because | |
521 | * the list could have got updated when | |
522 | * switched to the worker thread | |
523 | */ | |
524 | if (err == 0) { | |
7a462745 AK |
525 | fidp = &head_fid; |
526 | } | |
527 | } | |
528 | } | |
529 | return 0; | |
530 | } | |
531 | ||
8440e22e | 532 | static void coroutine_fn virtfs_reset(V9fsPDU *pdu) |
b41e2992 DS |
533 | { |
534 | V9fsState *s = pdu->s; | |
79decce3 | 535 | V9fsFidState *fidp; |
b41e2992 DS |
536 | |
537 | /* Free all fids */ | |
538 | while (s->fid_list) { | |
6d54af0e | 539 | /* Get fid */ |
b41e2992 | 540 | fidp = s->fid_list; |
6d54af0e GK |
541 | fidp->ref++; |
542 | ||
543 | /* Clunk fid */ | |
b41e2992 | 544 | s->fid_list = fidp->next; |
6d54af0e | 545 | fidp->clunked = 1; |
b41e2992 | 546 | |
6d54af0e | 547 | put_fid(pdu, fidp); |
b41e2992 | 548 | } |
b41e2992 DS |
549 | } |
550 | ||
286d5652 AL |
551 | #define P9_QID_TYPE_DIR 0x80 |
552 | #define P9_QID_TYPE_SYMLINK 0x02 | |
553 | ||
554 | #define P9_STAT_MODE_DIR 0x80000000 | |
555 | #define P9_STAT_MODE_APPEND 0x40000000 | |
556 | #define P9_STAT_MODE_EXCL 0x20000000 | |
557 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
558 | #define P9_STAT_MODE_AUTH 0x08000000 | |
559 | #define P9_STAT_MODE_TMP 0x04000000 | |
560 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
561 | #define P9_STAT_MODE_LINK 0x01000000 | |
562 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
563 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
564 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
565 | #define P9_STAT_MODE_SETUID 0x00080000 | |
566 | #define P9_STAT_MODE_SETGID 0x00040000 | |
567 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
568 | ||
569 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
570 | P9_STAT_MODE_SYMLINK | \ | |
571 | P9_STAT_MODE_LINK | \ | |
572 | P9_STAT_MODE_DEVICE | \ | |
573 | P9_STAT_MODE_NAMED_PIPE | \ | |
574 | P9_STAT_MODE_SOCKET) | |
575 | ||
1a6ed33c AM |
576 | /* creative abuse of tb_hash_func7, which is based on xxhash */ |
577 | static uint32_t qpp_hash(QppEntry e) | |
578 | { | |
579 | return qemu_xxhash7(e.ino_prefix, e.dev, 0, 0, 0); | |
580 | } | |
581 | ||
f3fe4a2d AM |
582 | static uint32_t qpf_hash(QpfEntry e) |
583 | { | |
584 | return qemu_xxhash7(e.ino, e.dev, 0, 0, 0); | |
585 | } | |
586 | ||
1a6ed33c AM |
587 | static bool qpp_lookup_func(const void *obj, const void *userp) |
588 | { | |
589 | const QppEntry *e1 = obj, *e2 = userp; | |
590 | return e1->dev == e2->dev && e1->ino_prefix == e2->ino_prefix; | |
591 | } | |
592 | ||
f3fe4a2d AM |
593 | static bool qpf_lookup_func(const void *obj, const void *userp) |
594 | { | |
595 | const QpfEntry *e1 = obj, *e2 = userp; | |
596 | return e1->dev == e2->dev && e1->ino == e2->ino; | |
597 | } | |
598 | ||
599 | static void qp_table_remove(void *p, uint32_t h, void *up) | |
1a6ed33c AM |
600 | { |
601 | g_free(p); | |
602 | } | |
603 | ||
f3fe4a2d | 604 | static void qp_table_destroy(struct qht *ht) |
1a6ed33c AM |
605 | { |
606 | if (!ht || !ht->map) { | |
607 | return; | |
608 | } | |
f3fe4a2d | 609 | qht_iter(ht, qp_table_remove, NULL); |
1a6ed33c AM |
610 | qht_destroy(ht); |
611 | } | |
612 | ||
613 | static void qpp_table_init(struct qht *ht) | |
614 | { | |
615 | qht_init(ht, qpp_lookup_func, 1, QHT_MODE_AUTO_RESIZE); | |
616 | } | |
617 | ||
f3fe4a2d AM |
618 | static void qpf_table_init(struct qht *ht) |
619 | { | |
620 | qht_init(ht, qpf_lookup_func, 1 << 16, QHT_MODE_AUTO_RESIZE); | |
621 | } | |
622 | ||
623 | static int qid_path_fullmap(V9fsPDU *pdu, const struct stat *stbuf, | |
624 | uint64_t *path) | |
625 | { | |
626 | QpfEntry lookup = { | |
627 | .dev = stbuf->st_dev, | |
628 | .ino = stbuf->st_ino | |
629 | }, *val; | |
630 | uint32_t hash = qpf_hash(lookup); | |
631 | ||
632 | /* most users won't need the fullmap, so init the table lazily */ | |
633 | if (!pdu->s->qpf_table.map) { | |
634 | qpf_table_init(&pdu->s->qpf_table); | |
635 | } | |
636 | ||
637 | val = qht_lookup(&pdu->s->qpf_table, &lookup, hash); | |
638 | ||
639 | if (!val) { | |
640 | if (pdu->s->qp_fullpath_next == 0) { | |
641 | /* no more files can be mapped :'( */ | |
642 | error_report_once( | |
643 | "9p: No more prefixes available for remapping inodes from " | |
644 | "host to guest." | |
645 | ); | |
646 | return -ENFILE; | |
647 | } | |
648 | ||
649 | val = g_malloc0(sizeof(QppEntry)); | |
650 | *val = lookup; | |
651 | ||
652 | /* new unique inode and device combo */ | |
653 | val->path = pdu->s->qp_fullpath_next++; | |
654 | pdu->s->qp_fullpath_next &= QPATH_INO_MASK; | |
655 | qht_insert(&pdu->s->qpf_table, val, hash, NULL); | |
656 | } | |
657 | ||
658 | *path = val->path; | |
659 | return 0; | |
660 | } | |
661 | ||
1a6ed33c AM |
662 | /* |
663 | * stat_to_qid needs to map inode number (64 bits) and device id (32 bits) | |
664 | * to a unique QID path (64 bits). To avoid having to map and keep track | |
665 | * of up to 2^64 objects, we map only the 16 highest bits of the inode plus | |
666 | * the device id to the 16 highest bits of the QID path. The 48 lowest bits | |
667 | * of the QID path equal to the lowest bits of the inode number. | |
668 | * | |
669 | * This takes advantage of the fact that inode number are usually not | |
670 | * random but allocated sequentially, so we have fewer items to keep | |
671 | * track of. | |
672 | */ | |
673 | static int qid_path_prefixmap(V9fsPDU *pdu, const struct stat *stbuf, | |
674 | uint64_t *path) | |
675 | { | |
676 | QppEntry lookup = { | |
677 | .dev = stbuf->st_dev, | |
678 | .ino_prefix = (uint16_t) (stbuf->st_ino >> 48) | |
679 | }, *val; | |
680 | uint32_t hash = qpp_hash(lookup); | |
681 | ||
682 | val = qht_lookup(&pdu->s->qpp_table, &lookup, hash); | |
683 | ||
684 | if (!val) { | |
685 | if (pdu->s->qp_prefix_next == 0) { | |
686 | /* we ran out of prefixes */ | |
f3fe4a2d AM |
687 | warn_report_once( |
688 | "9p: Potential degraded performance of inode remapping" | |
1a6ed33c AM |
689 | ); |
690 | return -ENFILE; | |
691 | } | |
692 | ||
693 | val = g_malloc0(sizeof(QppEntry)); | |
694 | *val = lookup; | |
695 | ||
696 | /* new unique inode prefix and device combo */ | |
697 | val->qp_prefix = pdu->s->qp_prefix_next++; | |
698 | qht_insert(&pdu->s->qpp_table, val, hash, NULL); | |
699 | } | |
700 | ||
701 | *path = ((uint64_t)val->qp_prefix << 48) | (stbuf->st_ino & QPATH_INO_MASK); | |
702 | return 0; | |
703 | } | |
704 | ||
3b5ee9e8 | 705 | static int stat_to_qid(V9fsPDU *pdu, const struct stat *stbuf, V9fsQID *qidp) |
286d5652 | 706 | { |
1a6ed33c | 707 | int err; |
286d5652 AL |
708 | size_t size; |
709 | ||
1a6ed33c AM |
710 | if (pdu->s->ctx.export_flags & V9FS_REMAP_INODES) { |
711 | /* map inode+device to qid path (fast path) */ | |
712 | err = qid_path_prefixmap(pdu, stbuf, &qidp->path); | |
f3fe4a2d AM |
713 | if (err == -ENFILE) { |
714 | /* fast path didn't work, fall back to full map */ | |
715 | err = qid_path_fullmap(pdu, stbuf, &qidp->path); | |
716 | } | |
1a6ed33c AM |
717 | if (err) { |
718 | return err; | |
719 | } | |
720 | } else { | |
721 | if (pdu->s->dev_id != stbuf->st_dev) { | |
722 | if (pdu->s->ctx.export_flags & V9FS_FORBID_MULTIDEVS) { | |
723 | error_report_once( | |
724 | "9p: Multiple devices detected in same VirtFS export. " | |
725 | "Access of guest to additional devices is (partly) " | |
726 | "denied due to virtfs option 'multidevs=forbid' being " | |
727 | "effective." | |
728 | ); | |
729 | return -ENODEV; | |
730 | } else { | |
731 | warn_report_once( | |
732 | "9p: Multiple devices detected in same VirtFS export, " | |
733 | "which might lead to file ID collisions and severe " | |
734 | "misbehaviours on guest! You should either use a " | |
735 | "separate export for each device shared from host or " | |
736 | "use virtfs option 'multidevs=remap'!" | |
737 | ); | |
738 | } | |
739 | } | |
740 | memset(&qidp->path, 0, sizeof(qidp->path)); | |
741 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
742 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
3b5ee9e8 AM |
743 | } |
744 | ||
286d5652 AL |
745 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); |
746 | qidp->type = 0; | |
747 | if (S_ISDIR(stbuf->st_mode)) { | |
748 | qidp->type |= P9_QID_TYPE_DIR; | |
749 | } | |
750 | if (S_ISLNK(stbuf->st_mode)) { | |
751 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
752 | } | |
3b5ee9e8 AM |
753 | |
754 | return 0; | |
286d5652 AL |
755 | } |
756 | ||
8440e22e GK |
757 | static int coroutine_fn fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, |
758 | V9fsQID *qidp) | |
286d5652 AL |
759 | { |
760 | struct stat stbuf; | |
761 | int err; | |
762 | ||
bccacf6c | 763 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
8c158561 | 764 | if (err < 0) { |
286d5652 AL |
765 | return err; |
766 | } | |
3b5ee9e8 AM |
767 | err = stat_to_qid(pdu, &stbuf, qidp); |
768 | if (err < 0) { | |
769 | return err; | |
770 | } | |
286d5652 AL |
771 | return 0; |
772 | } | |
773 | ||
1a6ed33c AM |
774 | static int coroutine_fn dirent_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, |
775 | struct dirent *dent, V9fsQID *qidp) | |
776 | { | |
777 | struct stat stbuf; | |
778 | V9fsPath path; | |
779 | int err; | |
780 | ||
781 | v9fs_path_init(&path); | |
782 | ||
783 | err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); | |
784 | if (err < 0) { | |
785 | goto out; | |
786 | } | |
787 | err = v9fs_co_lstat(pdu, &path, &stbuf); | |
788 | if (err < 0) { | |
789 | goto out; | |
790 | } | |
791 | err = stat_to_qid(pdu, &stbuf, qidp); | |
792 | ||
793 | out: | |
794 | v9fs_path_free(&path); | |
795 | return err; | |
796 | } | |
797 | ||
4b311c5f | 798 | V9fsPDU *pdu_alloc(V9fsState *s) |
9f107513 AL |
799 | { |
800 | V9fsPDU *pdu = NULL; | |
801 | ||
802 | if (!QLIST_EMPTY(&s->free_list)) { | |
bccacf6c AK |
803 | pdu = QLIST_FIRST(&s->free_list); |
804 | QLIST_REMOVE(pdu, next); | |
805 | QLIST_INSERT_HEAD(&s->active_list, pdu, next); | |
9f107513 AL |
806 | } |
807 | return pdu; | |
808 | } | |
809 | ||
4b311c5f | 810 | void pdu_free(V9fsPDU *pdu) |
9f107513 | 811 | { |
6868a420 | 812 | V9fsState *s = pdu->s; |
f74e27bf GK |
813 | |
814 | g_assert(!pdu->cancelled); | |
815 | QLIST_REMOVE(pdu, next); | |
816 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
9f107513 AL |
817 | } |
818 | ||
8440e22e | 819 | static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len) |
405a549a AL |
820 | { |
821 | int8_t id = pdu->id + 1; /* Response */ | |
ad38ce9e | 822 | V9fsState *s = pdu->s; |
06a37db7 | 823 | int ret; |
405a549a | 824 | |
fc78d5ee KF |
825 | /* |
826 | * The 9p spec requires that successfully cancelled pdus receive no reply. | |
827 | * Sending a reply would confuse clients because they would | |
828 | * assume that any EINTR is the actual result of the operation, | |
829 | * rather than a consequence of the cancellation. However, if | |
830 | * the operation completed (succesfully or with an error other | |
831 | * than caused be cancellation), we do send out that reply, both | |
832 | * for efficiency and to avoid confusing the rest of the state machine | |
833 | * that assumes passing a non-error here will mean a successful | |
834 | * transmission of the reply. | |
835 | */ | |
836 | bool discard = pdu->cancelled && len == -EINTR; | |
837 | if (discard) { | |
838 | trace_v9fs_rcancel(pdu->tag, pdu->id); | |
839 | pdu->size = 0; | |
840 | goto out_notify; | |
841 | } | |
842 | ||
405a549a | 843 | if (len < 0) { |
405a549a | 844 | int err = -len; |
8f4d1ca5 | 845 | len = 7; |
405a549a | 846 | |
8f4d1ca5 AB |
847 | if (s->proto_version != V9FS_PROTO_2000L) { |
848 | V9fsString str; | |
849 | ||
850 | str.data = strerror(err); | |
851 | str.size = strlen(str.data); | |
852 | ||
06a37db7 GK |
853 | ret = pdu_marshal(pdu, len, "s", &str); |
854 | if (ret < 0) { | |
855 | goto out_notify; | |
856 | } | |
857 | len += ret; | |
8f4d1ca5 AB |
858 | id = P9_RERROR; |
859 | } | |
405a549a | 860 | |
06a37db7 GK |
861 | ret = pdu_marshal(pdu, len, "d", err); |
862 | if (ret < 0) { | |
863 | goto out_notify; | |
864 | } | |
865 | len += ret; | |
405a549a | 866 | |
8f4d1ca5 AB |
867 | if (s->proto_version == V9FS_PROTO_2000L) { |
868 | id = P9_RLERROR; | |
869 | } | |
7999f7e1 | 870 | trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ |
405a549a AL |
871 | } |
872 | ||
873 | /* fill out the header */ | |
06a37db7 GK |
874 | if (pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag) < 0) { |
875 | goto out_notify; | |
876 | } | |
405a549a AL |
877 | |
878 | /* keep these in sync */ | |
879 | pdu->size = len; | |
880 | pdu->id = id; | |
881 | ||
06a37db7 | 882 | out_notify: |
a17d8659 | 883 | pdu->s->transport->push_and_notify(pdu); |
405a549a | 884 | |
bccacf6c | 885 | /* Now wakeup anybody waiting in flush for this request */ |
f74e27bf GK |
886 | if (!qemu_co_queue_next(&pdu->complete)) { |
887 | pdu_free(pdu); | |
888 | } | |
405a549a AL |
889 | } |
890 | ||
bb9e3216 AL |
891 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
892 | { | |
893 | mode_t ret; | |
894 | ||
895 | ret = mode & 0777; | |
896 | if (mode & P9_STAT_MODE_DIR) { | |
897 | ret |= S_IFDIR; | |
898 | } | |
899 | ||
cf03eb2c AB |
900 | if (mode & P9_STAT_MODE_SYMLINK) { |
901 | ret |= S_IFLNK; | |
902 | } | |
903 | if (mode & P9_STAT_MODE_SOCKET) { | |
904 | ret |= S_IFSOCK; | |
905 | } | |
906 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
907 | ret |= S_IFIFO; | |
908 | } | |
909 | if (mode & P9_STAT_MODE_DEVICE) { | |
c7e587b7 | 910 | if (extension->size && extension->data[0] == 'c') { |
cf03eb2c AB |
911 | ret |= S_IFCHR; |
912 | } else { | |
913 | ret |= S_IFBLK; | |
bb9e3216 AL |
914 | } |
915 | } | |
916 | ||
917 | if (!(ret&~0777)) { | |
918 | ret |= S_IFREG; | |
919 | } | |
920 | ||
921 | if (mode & P9_STAT_MODE_SETUID) { | |
922 | ret |= S_ISUID; | |
923 | } | |
924 | if (mode & P9_STAT_MODE_SETGID) { | |
925 | ret |= S_ISGID; | |
926 | } | |
927 | if (mode & P9_STAT_MODE_SETVTX) { | |
928 | ret |= S_ISVTX; | |
929 | } | |
930 | ||
931 | return ret; | |
932 | } | |
933 | ||
934 | static int donttouch_stat(V9fsStat *stat) | |
935 | { | |
936 | if (stat->type == -1 && | |
937 | stat->dev == -1 && | |
87032833 AM |
938 | stat->qid.type == 0xff && |
939 | stat->qid.version == (uint32_t) -1 && | |
940 | stat->qid.path == (uint64_t) -1 && | |
bb9e3216 AL |
941 | stat->mode == -1 && |
942 | stat->atime == -1 && | |
943 | stat->mtime == -1 && | |
944 | stat->length == -1 && | |
945 | !stat->name.size && | |
946 | !stat->uid.size && | |
947 | !stat->gid.size && | |
948 | !stat->muid.size && | |
949 | stat->n_uid == -1 && | |
950 | stat->n_gid == -1 && | |
951 | stat->n_muid == -1) { | |
952 | return 1; | |
953 | } | |
954 | ||
955 | return 0; | |
956 | } | |
957 | ||
ddca7f86 MK |
958 | static void v9fs_stat_init(V9fsStat *stat) |
959 | { | |
960 | v9fs_string_init(&stat->name); | |
961 | v9fs_string_init(&stat->uid); | |
962 | v9fs_string_init(&stat->gid); | |
963 | v9fs_string_init(&stat->muid); | |
964 | v9fs_string_init(&stat->extension); | |
965 | } | |
966 | ||
bb9e3216 AL |
967 | static void v9fs_stat_free(V9fsStat *stat) |
968 | { | |
969 | v9fs_string_free(&stat->name); | |
970 | v9fs_string_free(&stat->uid); | |
971 | v9fs_string_free(&stat->gid); | |
972 | v9fs_string_free(&stat->muid); | |
973 | v9fs_string_free(&stat->extension); | |
974 | } | |
975 | ||
976 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
977 | { | |
978 | uint32_t mode; | |
979 | ||
980 | mode = stbuf->st_mode & 0777; | |
981 | if (S_ISDIR(stbuf->st_mode)) { | |
982 | mode |= P9_STAT_MODE_DIR; | |
983 | } | |
984 | ||
cf03eb2c AB |
985 | if (S_ISLNK(stbuf->st_mode)) { |
986 | mode |= P9_STAT_MODE_SYMLINK; | |
987 | } | |
bb9e3216 | 988 | |
cf03eb2c AB |
989 | if (S_ISSOCK(stbuf->st_mode)) { |
990 | mode |= P9_STAT_MODE_SOCKET; | |
991 | } | |
bb9e3216 | 992 | |
cf03eb2c AB |
993 | if (S_ISFIFO(stbuf->st_mode)) { |
994 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
995 | } | |
bb9e3216 | 996 | |
cf03eb2c AB |
997 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { |
998 | mode |= P9_STAT_MODE_DEVICE; | |
999 | } | |
bb9e3216 | 1000 | |
cf03eb2c AB |
1001 | if (stbuf->st_mode & S_ISUID) { |
1002 | mode |= P9_STAT_MODE_SETUID; | |
1003 | } | |
bb9e3216 | 1004 | |
cf03eb2c AB |
1005 | if (stbuf->st_mode & S_ISGID) { |
1006 | mode |= P9_STAT_MODE_SETGID; | |
1007 | } | |
bb9e3216 | 1008 | |
cf03eb2c AB |
1009 | if (stbuf->st_mode & S_ISVTX) { |
1010 | mode |= P9_STAT_MODE_SETVTX; | |
bb9e3216 AL |
1011 | } |
1012 | ||
1013 | return mode; | |
1014 | } | |
1015 | ||
6069537f JD |
1016 | static int coroutine_fn stat_to_v9stat(V9fsPDU *pdu, V9fsPath *path, |
1017 | const char *basename, | |
8440e22e GK |
1018 | const struct stat *stbuf, |
1019 | V9fsStat *v9stat) | |
bb9e3216 AL |
1020 | { |
1021 | int err; | |
bb9e3216 AL |
1022 | |
1023 | memset(v9stat, 0, sizeof(*v9stat)); | |
1024 | ||
3b5ee9e8 AM |
1025 | err = stat_to_qid(pdu, stbuf, &v9stat->qid); |
1026 | if (err < 0) { | |
1027 | return err; | |
1028 | } | |
bb9e3216 AL |
1029 | v9stat->mode = stat_to_v9mode(stbuf); |
1030 | v9stat->atime = stbuf->st_atime; | |
1031 | v9stat->mtime = stbuf->st_mtime; | |
1032 | v9stat->length = stbuf->st_size; | |
1033 | ||
abdf0086 GK |
1034 | v9fs_string_free(&v9stat->uid); |
1035 | v9fs_string_free(&v9stat->gid); | |
1036 | v9fs_string_free(&v9stat->muid); | |
bb9e3216 | 1037 | |
cf03eb2c AB |
1038 | v9stat->n_uid = stbuf->st_uid; |
1039 | v9stat->n_gid = stbuf->st_gid; | |
1040 | v9stat->n_muid = 0; | |
bb9e3216 | 1041 | |
abdf0086 | 1042 | v9fs_string_free(&v9stat->extension); |
bb9e3216 | 1043 | |
cf03eb2c | 1044 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { |
6069537f | 1045 | err = v9fs_co_readlink(pdu, path, &v9stat->extension); |
7a5ca31e | 1046 | if (err < 0) { |
cf03eb2c | 1047 | return err; |
bb9e3216 | 1048 | } |
cf03eb2c AB |
1049 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1050 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
1051 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
1052 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
1053 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
c9ba47dc SW |
1054 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
1055 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); | |
bb9e3216 AL |
1056 | } |
1057 | ||
6069537f | 1058 | v9fs_string_sprintf(&v9stat->name, "%s", basename); |
bb9e3216 AL |
1059 | |
1060 | v9stat->size = 61 + | |
1061 | v9fs_string_size(&v9stat->name) + | |
1062 | v9fs_string_size(&v9stat->uid) + | |
1063 | v9fs_string_size(&v9stat->gid) + | |
1064 | v9fs_string_size(&v9stat->muid) + | |
1065 | v9fs_string_size(&v9stat->extension); | |
1066 | return 0; | |
1067 | } | |
1068 | ||
00ede4c2 SK |
1069 | #define P9_STATS_MODE 0x00000001ULL |
1070 | #define P9_STATS_NLINK 0x00000002ULL | |
1071 | #define P9_STATS_UID 0x00000004ULL | |
1072 | #define P9_STATS_GID 0x00000008ULL | |
1073 | #define P9_STATS_RDEV 0x00000010ULL | |
1074 | #define P9_STATS_ATIME 0x00000020ULL | |
1075 | #define P9_STATS_MTIME 0x00000040ULL | |
1076 | #define P9_STATS_CTIME 0x00000080ULL | |
1077 | #define P9_STATS_INO 0x00000100ULL | |
1078 | #define P9_STATS_SIZE 0x00000200ULL | |
1079 | #define P9_STATS_BLOCKS 0x00000400ULL | |
1080 | ||
1081 | #define P9_STATS_BTIME 0x00000800ULL | |
1082 | #define P9_STATS_GEN 0x00001000ULL | |
1083 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
1084 | ||
1085 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
1086 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
1087 | ||
1088 | ||
3b5ee9e8 | 1089 | static int stat_to_v9stat_dotl(V9fsPDU *pdu, const struct stat *stbuf, |
8db21ce7 | 1090 | V9fsStatDotl *v9lstat) |
00ede4c2 SK |
1091 | { |
1092 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
1093 | ||
1094 | v9lstat->st_mode = stbuf->st_mode; | |
1095 | v9lstat->st_nlink = stbuf->st_nlink; | |
1096 | v9lstat->st_uid = stbuf->st_uid; | |
1097 | v9lstat->st_gid = stbuf->st_gid; | |
1098 | v9lstat->st_rdev = stbuf->st_rdev; | |
1099 | v9lstat->st_size = stbuf->st_size; | |
1100 | v9lstat->st_blksize = stbuf->st_blksize; | |
1101 | v9lstat->st_blocks = stbuf->st_blocks; | |
1102 | v9lstat->st_atime_sec = stbuf->st_atime; | |
1103 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
1104 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
1105 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
1106 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
1107 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
1108 | /* Currently we only support BASIC fields in stat */ | |
1109 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
1110 | ||
3b5ee9e8 | 1111 | return stat_to_qid(pdu, stbuf, &v9lstat->qid); |
00ede4c2 SK |
1112 | } |
1113 | ||
1f5a89bf AL |
1114 | static void print_sg(struct iovec *sg, int cnt) |
1115 | { | |
1116 | int i; | |
1117 | ||
1118 | printf("sg[%d]: {", cnt); | |
1119 | for (i = 0; i < cnt; i++) { | |
1120 | if (i) { | |
1121 | printf(", "); | |
1122 | } | |
1123 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1124 | } | |
1125 | printf("}\n"); | |
1126 | } | |
1127 | ||
2289be19 AK |
1128 | /* Will call this only for path name based fid */ |
1129 | static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) | |
8cf89e00 | 1130 | { |
2289be19 AK |
1131 | V9fsPath str; |
1132 | v9fs_path_init(&str); | |
1133 | v9fs_path_copy(&str, dst); | |
e3e83f2e | 1134 | v9fs_path_sprintf(dst, "%s%s", src->data, str.data + len); |
2289be19 | 1135 | v9fs_path_free(&str); |
8cf89e00 AL |
1136 | } |
1137 | ||
2c74c2cb MK |
1138 | static inline bool is_ro_export(FsContext *ctx) |
1139 | { | |
1140 | return ctx->export_flags & V9FS_RDONLY; | |
1141 | } | |
1142 | ||
8440e22e | 1143 | static void coroutine_fn v9fs_version(void *opaque) |
9f107513 | 1144 | { |
ddca7f86 | 1145 | ssize_t err; |
ff06030f VJ |
1146 | V9fsPDU *pdu = opaque; |
1147 | V9fsState *s = pdu->s; | |
92c1ad03 AL |
1148 | V9fsString version; |
1149 | size_t offset = 7; | |
1150 | ||
ddca7f86 MK |
1151 | v9fs_string_init(&version); |
1152 | err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); | |
1153 | if (err < 0) { | |
ddca7f86 MK |
1154 | goto out; |
1155 | } | |
c572f23a | 1156 | trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); |
92c1ad03 | 1157 | |
b41e2992 DS |
1158 | virtfs_reset(pdu); |
1159 | ||
84151514 MK |
1160 | if (!strcmp(version.data, "9P2000.u")) { |
1161 | s->proto_version = V9FS_PROTO_2000U; | |
1162 | } else if (!strcmp(version.data, "9P2000.L")) { | |
1163 | s->proto_version = V9FS_PROTO_2000L; | |
1164 | } else { | |
92c1ad03 | 1165 | v9fs_string_sprintf(&version, "unknown"); |
9f107513 | 1166 | } |
92c1ad03 | 1167 | |
ddca7f86 MK |
1168 | err = pdu_marshal(pdu, offset, "ds", s->msize, &version); |
1169 | if (err < 0) { | |
ddca7f86 MK |
1170 | goto out; |
1171 | } | |
403a905b | 1172 | err += offset; |
c572f23a | 1173 | trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); |
ddca7f86 | 1174 | out: |
403a905b | 1175 | pdu_complete(pdu, err); |
92c1ad03 | 1176 | v9fs_string_free(&version); |
9f107513 AL |
1177 | } |
1178 | ||
8440e22e | 1179 | static void coroutine_fn v9fs_attach(void *opaque) |
9f107513 | 1180 | { |
ff06030f VJ |
1181 | V9fsPDU *pdu = opaque; |
1182 | V9fsState *s = pdu->s; | |
955efc47 AL |
1183 | int32_t fid, afid, n_uname; |
1184 | V9fsString uname, aname; | |
1185 | V9fsFidState *fidp; | |
955efc47 | 1186 | size_t offset = 7; |
8c158561 | 1187 | V9fsQID qid; |
955efc47 | 1188 | ssize_t err; |
fe44dc91 | 1189 | Error *local_err = NULL; |
955efc47 | 1190 | |
ddca7f86 MK |
1191 | v9fs_string_init(&uname); |
1192 | v9fs_string_init(&aname); | |
1193 | err = pdu_unmarshal(pdu, offset, "ddssd", &fid, | |
1194 | &afid, &uname, &aname, &n_uname); | |
1195 | if (err < 0) { | |
1196 | goto out_nofid; | |
1197 | } | |
c572f23a | 1198 | trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); |
955efc47 AL |
1199 | |
1200 | fidp = alloc_fid(s, fid); | |
1201 | if (fidp == NULL) { | |
1202 | err = -EINVAL; | |
84dfb926 | 1203 | goto out_nofid; |
9f107513 | 1204 | } |
955efc47 | 1205 | fidp->uid = n_uname; |
bccacf6c | 1206 | err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); |
2289be19 AK |
1207 | if (err < 0) { |
1208 | err = -EINVAL; | |
1209 | clunk_fid(s, fid); | |
1210 | goto out; | |
1211 | } | |
bccacf6c | 1212 | err = fid_to_qid(pdu, fidp, &qid); |
8c158561 | 1213 | if (err < 0) { |
955efc47 | 1214 | err = -EINVAL; |
84dfb926 | 1215 | clunk_fid(s, fid); |
955efc47 AL |
1216 | goto out; |
1217 | } | |
fe44dc91 | 1218 | |
4cdc0789 AK |
1219 | /* |
1220 | * disable migration if we haven't done already. | |
1221 | * attach could get called multiple times for the same export. | |
1222 | */ | |
1223 | if (!s->migration_blocker) { | |
f231b88d CR |
1224 | error_setg(&s->migration_blocker, |
1225 | "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", | |
1226 | s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); | |
fe44dc91 AA |
1227 | err = migrate_add_blocker(s->migration_blocker, &local_err); |
1228 | if (local_err) { | |
1229 | error_free(local_err); | |
1230 | error_free(s->migration_blocker); | |
1231 | s->migration_blocker = NULL; | |
1232 | clunk_fid(s, fid); | |
1233 | goto out; | |
1234 | } | |
1235 | s->root_fid = fid; | |
1236 | } | |
1237 | ||
1238 | err = pdu_marshal(pdu, offset, "Q", &qid); | |
1239 | if (err < 0) { | |
1240 | clunk_fid(s, fid); | |
1241 | goto out; | |
4cdc0789 | 1242 | } |
fe44dc91 AA |
1243 | err += offset; |
1244 | ||
1245 | memcpy(&s->root_qid, &qid, sizeof(qid)); | |
1246 | trace_v9fs_attach_return(pdu->tag, pdu->id, | |
1247 | qid.type, qid.version, qid.path); | |
955efc47 | 1248 | out: |
bccacf6c | 1249 | put_fid(pdu, fidp); |
84dfb926 | 1250 | out_nofid: |
dc295f83 | 1251 | pdu_complete(pdu, err); |
955efc47 AL |
1252 | v9fs_string_free(&uname); |
1253 | v9fs_string_free(&aname); | |
9f107513 AL |
1254 | } |
1255 | ||
8440e22e | 1256 | static void coroutine_fn v9fs_stat(void *opaque) |
9f107513 | 1257 | { |
4da7d3fa | 1258 | int32_t fid; |
d8e0c29e | 1259 | V9fsStat v9stat; |
4da7d3fa | 1260 | ssize_t err = 0; |
d8e0c29e AK |
1261 | size_t offset = 7; |
1262 | struct stat stbuf; | |
1263 | V9fsFidState *fidp; | |
1264 | V9fsPDU *pdu = opaque; | |
6069537f | 1265 | char *basename; |
4da7d3fa | 1266 | |
ddca7f86 MK |
1267 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
1268 | if (err < 0) { | |
1269 | goto out_nofid; | |
1270 | } | |
c572f23a | 1271 | trace_v9fs_stat(pdu->tag, pdu->id, fid); |
84dfb926 | 1272 | |
bccacf6c | 1273 | fidp = get_fid(pdu, fid); |
d8e0c29e | 1274 | if (fidp == NULL) { |
4da7d3fa | 1275 | err = -ENOENT; |
84dfb926 | 1276 | goto out_nofid; |
9f107513 | 1277 | } |
bccacf6c | 1278 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
d8e0c29e AK |
1279 | if (err < 0) { |
1280 | goto out; | |
1281 | } | |
6069537f JD |
1282 | basename = g_path_get_basename(fidp->path.data); |
1283 | err = stat_to_v9stat(pdu, &fidp->path, basename, &stbuf, &v9stat); | |
1284 | g_free(basename); | |
d8e0c29e AK |
1285 | if (err < 0) { |
1286 | goto out; | |
1287 | } | |
ddca7f86 MK |
1288 | err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); |
1289 | if (err < 0) { | |
1290 | v9fs_stat_free(&v9stat); | |
1291 | goto out; | |
1292 | } | |
7999f7e1 AK |
1293 | trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, |
1294 | v9stat.atime, v9stat.mtime, v9stat.length); | |
ddca7f86 | 1295 | err += offset; |
d8e0c29e | 1296 | v9fs_stat_free(&v9stat); |
4da7d3fa | 1297 | out: |
bccacf6c | 1298 | put_fid(pdu, fidp); |
84dfb926 | 1299 | out_nofid: |
dc295f83 | 1300 | pdu_complete(pdu, err); |
9f107513 AL |
1301 | } |
1302 | ||
8440e22e | 1303 | static void coroutine_fn v9fs_getattr(void *opaque) |
00ede4c2 SK |
1304 | { |
1305 | int32_t fid; | |
8db21ce7 AK |
1306 | size_t offset = 7; |
1307 | ssize_t retval = 0; | |
1308 | struct stat stbuf; | |
00ede4c2 SK |
1309 | V9fsFidState *fidp; |
1310 | uint64_t request_mask; | |
8db21ce7 AK |
1311 | V9fsStatDotl v9stat_dotl; |
1312 | V9fsPDU *pdu = opaque; | |
00ede4c2 | 1313 | |
ddca7f86 MK |
1314 | retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); |
1315 | if (retval < 0) { | |
1316 | goto out_nofid; | |
1317 | } | |
c572f23a | 1318 | trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); |
00ede4c2 | 1319 | |
bccacf6c | 1320 | fidp = get_fid(pdu, fid); |
00ede4c2 | 1321 | if (fidp == NULL) { |
8db21ce7 | 1322 | retval = -ENOENT; |
84dfb926 | 1323 | goto out_nofid; |
00ede4c2 | 1324 | } |
8db21ce7 AK |
1325 | /* |
1326 | * Currently we only support BASIC fields in stat, so there is no | |
00ede4c2 SK |
1327 | * need to look at request_mask. |
1328 | */ | |
bccacf6c | 1329 | retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
8db21ce7 AK |
1330 | if (retval < 0) { |
1331 | goto out; | |
1332 | } | |
3b5ee9e8 AM |
1333 | retval = stat_to_v9stat_dotl(pdu, &stbuf, &v9stat_dotl); |
1334 | if (retval < 0) { | |
1335 | goto out; | |
1336 | } | |
e06a765e HPB |
1337 | |
1338 | /* fill st_gen if requested and supported by underlying fs */ | |
1339 | if (request_mask & P9_STATS_GEN) { | |
1340 | retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); | |
f8b7ee38 KS |
1341 | switch (retval) { |
1342 | case 0: | |
1343 | /* we have valid st_gen: update result mask */ | |
1344 | v9stat_dotl.st_result_mask |= P9_STATS_GEN; | |
1345 | break; | |
1346 | case -EINTR: | |
1347 | /* request cancelled, e.g. by Tflush */ | |
e06a765e | 1348 | goto out; |
f8b7ee38 KS |
1349 | default: |
1350 | /* failed to get st_gen: not fatal, ignore */ | |
1351 | break; | |
e06a765e | 1352 | } |
e06a765e | 1353 | } |
ddca7f86 MK |
1354 | retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); |
1355 | if (retval < 0) { | |
1356 | goto out; | |
1357 | } | |
1358 | retval += offset; | |
c572f23a HPB |
1359 | trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, |
1360 | v9stat_dotl.st_mode, v9stat_dotl.st_uid, | |
1361 | v9stat_dotl.st_gid); | |
7999f7e1 AK |
1362 | out: |
1363 | put_fid(pdu, fidp); | |
1364 | out_nofid: | |
dc295f83 | 1365 | pdu_complete(pdu, retval); |
00ede4c2 SK |
1366 | } |
1367 | ||
e4027caf AK |
1368 | /* Attribute flags */ |
1369 | #define P9_ATTR_MODE (1 << 0) | |
1370 | #define P9_ATTR_UID (1 << 1) | |
1371 | #define P9_ATTR_GID (1 << 2) | |
1372 | #define P9_ATTR_SIZE (1 << 3) | |
1373 | #define P9_ATTR_ATIME (1 << 4) | |
1374 | #define P9_ATTR_MTIME (1 << 5) | |
1375 | #define P9_ATTR_CTIME (1 << 6) | |
1376 | #define P9_ATTR_ATIME_SET (1 << 7) | |
1377 | #define P9_ATTR_MTIME_SET (1 << 8) | |
1378 | ||
1379 | #define P9_ATTR_MASK 127 | |
c79ce737 | 1380 | |
8440e22e | 1381 | static void coroutine_fn v9fs_setattr(void *opaque) |
c79ce737 | 1382 | { |
65c05f9a AK |
1383 | int err = 0; |
1384 | int32_t fid; | |
1385 | V9fsFidState *fidp; | |
1386 | size_t offset = 7; | |
1387 | V9fsIattr v9iattr; | |
1388 | V9fsPDU *pdu = opaque; | |
c79ce737 | 1389 | |
ddca7f86 MK |
1390 | err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); |
1391 | if (err < 0) { | |
1392 | goto out_nofid; | |
1393 | } | |
c79ce737 | 1394 | |
8f9c64bf GK |
1395 | trace_v9fs_setattr(pdu->tag, pdu->id, fid, |
1396 | v9iattr.valid, v9iattr.mode, v9iattr.uid, v9iattr.gid, | |
1397 | v9iattr.size, v9iattr.atime_sec, v9iattr.mtime_sec); | |
1398 | ||
bccacf6c | 1399 | fidp = get_fid(pdu, fid); |
65c05f9a AK |
1400 | if (fidp == NULL) { |
1401 | err = -EINVAL; | |
84dfb926 | 1402 | goto out_nofid; |
c79ce737 | 1403 | } |
e4027caf | 1404 | if (v9iattr.valid & P9_ATTR_MODE) { |
bccacf6c | 1405 | err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); |
65c05f9a AK |
1406 | if (err < 0) { |
1407 | goto out; | |
c79ce737 | 1408 | } |
c79ce737 | 1409 | } |
e4027caf | 1410 | if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { |
c79ce737 | 1411 | struct timespec times[2]; |
e4027caf AK |
1412 | if (v9iattr.valid & P9_ATTR_ATIME) { |
1413 | if (v9iattr.valid & P9_ATTR_ATIME_SET) { | |
65c05f9a AK |
1414 | times[0].tv_sec = v9iattr.atime_sec; |
1415 | times[0].tv_nsec = v9iattr.atime_nsec; | |
c79ce737 SK |
1416 | } else { |
1417 | times[0].tv_nsec = UTIME_NOW; | |
1418 | } | |
1419 | } else { | |
1420 | times[0].tv_nsec = UTIME_OMIT; | |
1421 | } | |
e4027caf AK |
1422 | if (v9iattr.valid & P9_ATTR_MTIME) { |
1423 | if (v9iattr.valid & P9_ATTR_MTIME_SET) { | |
65c05f9a AK |
1424 | times[1].tv_sec = v9iattr.mtime_sec; |
1425 | times[1].tv_nsec = v9iattr.mtime_nsec; | |
c79ce737 SK |
1426 | } else { |
1427 | times[1].tv_nsec = UTIME_NOW; | |
1428 | } | |
1429 | } else { | |
1430 | times[1].tv_nsec = UTIME_OMIT; | |
1431 | } | |
bccacf6c | 1432 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
65c05f9a AK |
1433 | if (err < 0) { |
1434 | goto out; | |
1435 | } | |
c79ce737 | 1436 | } |
65c05f9a AK |
1437 | /* |
1438 | * If the only valid entry in iattr is ctime we can call | |
1439 | * chown(-1,-1) to update the ctime of the file | |
1440 | */ | |
e4027caf AK |
1441 | if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || |
1442 | ((v9iattr.valid & P9_ATTR_CTIME) | |
1443 | && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { | |
1444 | if (!(v9iattr.valid & P9_ATTR_UID)) { | |
65c05f9a AK |
1445 | v9iattr.uid = -1; |
1446 | } | |
e4027caf | 1447 | if (!(v9iattr.valid & P9_ATTR_GID)) { |
65c05f9a AK |
1448 | v9iattr.gid = -1; |
1449 | } | |
bccacf6c | 1450 | err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, |
65c05f9a AK |
1451 | v9iattr.gid); |
1452 | if (err < 0) { | |
1453 | goto out; | |
1454 | } | |
c79ce737 | 1455 | } |
e4027caf | 1456 | if (v9iattr.valid & (P9_ATTR_SIZE)) { |
bccacf6c | 1457 | err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); |
65c05f9a AK |
1458 | if (err < 0) { |
1459 | goto out; | |
1460 | } | |
c79ce737 | 1461 | } |
65c05f9a | 1462 | err = offset; |
8f9c64bf | 1463 | trace_v9fs_setattr_return(pdu->tag, pdu->id); |
c79ce737 | 1464 | out: |
bccacf6c | 1465 | put_fid(pdu, fidp); |
84dfb926 | 1466 | out_nofid: |
dc295f83 | 1467 | pdu_complete(pdu, err); |
c79ce737 SK |
1468 | } |
1469 | ||
3cc19c0c | 1470 | static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) |
ff5e54c9 AL |
1471 | { |
1472 | int i; | |
ddca7f86 | 1473 | ssize_t err; |
3cc19c0c | 1474 | size_t offset = 7; |
ddca7f86 MK |
1475 | |
1476 | err = pdu_marshal(pdu, offset, "w", nwnames); | |
1477 | if (err < 0) { | |
1478 | return err; | |
1479 | } | |
1480 | offset += err; | |
3cc19c0c | 1481 | for (i = 0; i < nwnames; i++) { |
ddca7f86 MK |
1482 | err = pdu_marshal(pdu, offset, "Q", &qids[i]); |
1483 | if (err < 0) { | |
1484 | return err; | |
1485 | } | |
1486 | offset += err; | |
ff5e54c9 | 1487 | } |
3cc19c0c | 1488 | return offset; |
ff5e54c9 AL |
1489 | } |
1490 | ||
fff39a7a GK |
1491 | static bool name_is_illegal(const char *name) |
1492 | { | |
1493 | return !*name || strchr(name, '/') != NULL; | |
1494 | } | |
1495 | ||
56f101ec GK |
1496 | static bool not_same_qid(const V9fsQID *qid1, const V9fsQID *qid2) |
1497 | { | |
1498 | return | |
1499 | qid1->type != qid2->type || | |
1500 | qid1->version != qid2->version || | |
1501 | qid1->path != qid2->path; | |
1502 | } | |
1503 | ||
8440e22e | 1504 | static void coroutine_fn v9fs_walk(void *opaque) |
9f107513 | 1505 | { |
3cc19c0c AK |
1506 | int name_idx; |
1507 | V9fsQID *qids = NULL; | |
1508 | int i, err = 0; | |
2289be19 | 1509 | V9fsPath dpath, path; |
3cc19c0c AK |
1510 | uint16_t nwnames; |
1511 | struct stat stbuf; | |
1512 | size_t offset = 7; | |
1513 | int32_t fid, newfid; | |
1514 | V9fsString *wnames = NULL; | |
1515 | V9fsFidState *fidp; | |
3a93113a | 1516 | V9fsFidState *newfidp = NULL; |
ff06030f VJ |
1517 | V9fsPDU *pdu = opaque; |
1518 | V9fsState *s = pdu->s; | |
56f101ec | 1519 | V9fsQID qid; |
ff5e54c9 | 1520 | |
ddca7f86 MK |
1521 | err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); |
1522 | if (err < 0) { | |
dc295f83 | 1523 | pdu_complete(pdu, err); |
ddca7f86 MK |
1524 | return ; |
1525 | } | |
1526 | offset += err; | |
ff5e54c9 | 1527 | |
c572f23a HPB |
1528 | trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); |
1529 | ||
3cc19c0c | 1530 | if (nwnames && nwnames <= P9_MAXWELEM) { |
1923923b GK |
1531 | wnames = g_new0(V9fsString, nwnames); |
1532 | qids = g_new0(V9fsQID, nwnames); | |
3cc19c0c | 1533 | for (i = 0; i < nwnames; i++) { |
ddca7f86 MK |
1534 | err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); |
1535 | if (err < 0) { | |
1536 | goto out_nofid; | |
1537 | } | |
fff39a7a GK |
1538 | if (name_is_illegal(wnames[i].data)) { |
1539 | err = -ENOENT; | |
1540 | goto out_nofid; | |
1541 | } | |
ddca7f86 | 1542 | offset += err; |
ff5e54c9 | 1543 | } |
3cc19c0c | 1544 | } else if (nwnames > P9_MAXWELEM) { |
4f8dee2d | 1545 | err = -EINVAL; |
84dfb926 | 1546 | goto out_nofid; |
ff5e54c9 | 1547 | } |
bccacf6c | 1548 | fidp = get_fid(pdu, fid); |
3cc19c0c | 1549 | if (fidp == NULL) { |
ff5e54c9 | 1550 | err = -ENOENT; |
84dfb926 | 1551 | goto out_nofid; |
ff5e54c9 | 1552 | } |
56f101ec | 1553 | |
13fd08e6 GK |
1554 | v9fs_path_init(&dpath); |
1555 | v9fs_path_init(&path); | |
1556 | ||
56f101ec GK |
1557 | err = fid_to_qid(pdu, fidp, &qid); |
1558 | if (err < 0) { | |
1559 | goto out; | |
1560 | } | |
1561 | ||
2289be19 AK |
1562 | /* |
1563 | * Both dpath and path initially poin to fidp. | |
1564 | * Needed to handle request with nwnames == 0 | |
1565 | */ | |
1566 | v9fs_path_copy(&dpath, &fidp->path); | |
1567 | v9fs_path_copy(&path, &fidp->path); | |
1568 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
56f101ec GK |
1569 | if (not_same_qid(&pdu->s->root_qid, &qid) || |
1570 | strcmp("..", wnames[name_idx].data)) { | |
1571 | err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, | |
1572 | &path); | |
1573 | if (err < 0) { | |
1574 | goto out; | |
1575 | } | |
1576 | ||
1577 | err = v9fs_co_lstat(pdu, &path, &stbuf); | |
1578 | if (err < 0) { | |
1579 | goto out; | |
1580 | } | |
3b5ee9e8 AM |
1581 | err = stat_to_qid(pdu, &stbuf, &qid); |
1582 | if (err < 0) { | |
1583 | goto out; | |
1584 | } | |
56f101ec | 1585 | v9fs_path_copy(&dpath, &path); |
2289be19 | 1586 | } |
56f101ec | 1587 | memcpy(&qids[name_idx], &qid, sizeof(qid)); |
2289be19 | 1588 | } |
ff5e54c9 | 1589 | if (fid == newfid) { |
49dd946b GK |
1590 | if (fidp->fid_type != P9_FID_NONE) { |
1591 | err = -EINVAL; | |
1592 | goto out; | |
1593 | } | |
5b3c77aa | 1594 | v9fs_path_write_lock(s); |
2289be19 | 1595 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 1596 | v9fs_path_unlock(s); |
ff5e54c9 | 1597 | } else { |
3cc19c0c AK |
1598 | newfidp = alloc_fid(s, newfid); |
1599 | if (newfidp == NULL) { | |
ff5e54c9 AL |
1600 | err = -EINVAL; |
1601 | goto out; | |
1602 | } | |
3cc19c0c | 1603 | newfidp->uid = fidp->uid; |
2289be19 | 1604 | v9fs_path_copy(&newfidp->path, &path); |
9f107513 | 1605 | } |
3cc19c0c | 1606 | err = v9fs_walk_marshal(pdu, nwnames, qids); |
7999f7e1 | 1607 | trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); |
ff5e54c9 | 1608 | out: |
bccacf6c | 1609 | put_fid(pdu, fidp); |
84dfb926 | 1610 | if (newfidp) { |
bccacf6c | 1611 | put_fid(pdu, newfidp); |
84dfb926 | 1612 | } |
2289be19 AK |
1613 | v9fs_path_free(&dpath); |
1614 | v9fs_path_free(&path); | |
84dfb926 | 1615 | out_nofid: |
dc295f83 | 1616 | pdu_complete(pdu, err); |
3cc19c0c AK |
1617 | if (nwnames && nwnames <= P9_MAXWELEM) { |
1618 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
1619 | v9fs_string_free(&wnames[name_idx]); | |
1620 | } | |
1621 | g_free(wnames); | |
1622 | g_free(qids); | |
1623 | } | |
9f107513 AL |
1624 | } |
1625 | ||
8440e22e | 1626 | static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) |
5e94c103 MK |
1627 | { |
1628 | struct statfs stbuf; | |
1629 | int32_t iounit = 0; | |
bccacf6c | 1630 | V9fsState *s = pdu->s; |
5e94c103 MK |
1631 | |
1632 | /* | |
1633 | * iounit should be multiples of f_bsize (host filesystem block size | |
1634 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1635 | */ | |
bccacf6c | 1636 | if (!v9fs_co_statfs(pdu, path, &stbuf)) { |
5e94c103 MK |
1637 | iounit = stbuf.f_bsize; |
1638 | iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; | |
1639 | } | |
5e94c103 MK |
1640 | if (!iounit) { |
1641 | iounit = s->msize - P9_IOHDRSZ; | |
1642 | } | |
1643 | return iounit; | |
1644 | } | |
1645 | ||
8440e22e | 1646 | static void coroutine_fn v9fs_open(void *opaque) |
5e94c103 | 1647 | { |
857bc158 | 1648 | int flags; |
857bc158 AK |
1649 | int32_t fid; |
1650 | int32_t mode; | |
1651 | V9fsQID qid; | |
7999f7e1 | 1652 | int iounit = 0; |
857bc158 AK |
1653 | ssize_t err = 0; |
1654 | size_t offset = 7; | |
1655 | struct stat stbuf; | |
1656 | V9fsFidState *fidp; | |
1657 | V9fsPDU *pdu = opaque; | |
1658 | V9fsState *s = pdu->s; | |
5e94c103 | 1659 | |
857bc158 | 1660 | if (s->proto_version == V9FS_PROTO_2000L) { |
ddca7f86 | 1661 | err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); |
857bc158 | 1662 | } else { |
67d6fa53 BH |
1663 | uint8_t modebyte; |
1664 | err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); | |
1665 | mode = modebyte; | |
ddca7f86 MK |
1666 | } |
1667 | if (err < 0) { | |
1668 | goto out_nofid; | |
857bc158 | 1669 | } |
c572f23a HPB |
1670 | trace_v9fs_open(pdu->tag, pdu->id, fid, mode); |
1671 | ||
bccacf6c | 1672 | fidp = get_fid(pdu, fid); |
857bc158 AK |
1673 | if (fidp == NULL) { |
1674 | err = -ENOENT; | |
84dfb926 | 1675 | goto out_nofid; |
a6568fe2 | 1676 | } |
49dd946b GK |
1677 | if (fidp->fid_type != P9_FID_NONE) { |
1678 | err = -EINVAL; | |
1679 | goto out; | |
1680 | } | |
a6568fe2 | 1681 | |
bccacf6c | 1682 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
857bc158 | 1683 | if (err < 0) { |
a6568fe2 AL |
1684 | goto out; |
1685 | } | |
3b5ee9e8 AM |
1686 | err = stat_to_qid(pdu, &stbuf, &qid); |
1687 | if (err < 0) { | |
1688 | goto out; | |
1689 | } | |
857bc158 | 1690 | if (S_ISDIR(stbuf.st_mode)) { |
bccacf6c | 1691 | err = v9fs_co_opendir(pdu, fidp); |
857bc158 AK |
1692 | if (err < 0) { |
1693 | goto out; | |
1694 | } | |
1695 | fidp->fid_type = P9_FID_DIR; | |
ddca7f86 MK |
1696 | err = pdu_marshal(pdu, offset, "Qd", &qid, 0); |
1697 | if (err < 0) { | |
1698 | goto out; | |
1699 | } | |
1700 | err += offset; | |
a6568fe2 | 1701 | } else { |
771e9d4c | 1702 | if (s->proto_version == V9FS_PROTO_2000L) { |
d3ab98e6 | 1703 | flags = get_dotl_openflags(s, mode); |
771e9d4c | 1704 | } else { |
857bc158 | 1705 | flags = omode_to_uflags(mode); |
771e9d4c | 1706 | } |
2c74c2cb MK |
1707 | if (is_ro_export(&s->ctx)) { |
1708 | if (mode & O_WRONLY || mode & O_RDWR || | |
1709 | mode & O_APPEND || mode & O_TRUNC) { | |
1710 | err = -EROFS; | |
1711 | goto out; | |
1712 | } | |
2c74c2cb | 1713 | } |
bccacf6c | 1714 | err = v9fs_co_open(pdu, fidp, flags); |
857bc158 AK |
1715 | if (err < 0) { |
1716 | goto out; | |
1717 | } | |
1718 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
1719 | fidp->open_flags = flags; |
1720 | if (flags & O_EXCL) { | |
1721 | /* | |
1722 | * We let the host file system do O_EXCL check | |
1723 | * We should not reclaim such fd | |
1724 | */ | |
1725 | fidp->flags |= FID_NON_RECLAIMABLE; | |
1726 | } | |
bccacf6c | 1727 | iounit = get_iounit(pdu, &fidp->path); |
ddca7f86 MK |
1728 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
1729 | if (err < 0) { | |
1730 | goto out; | |
1731 | } | |
1732 | err += offset; | |
a6568fe2 | 1733 | } |
7999f7e1 AK |
1734 | trace_v9fs_open_return(pdu->tag, pdu->id, |
1735 | qid.type, qid.version, qid.path, iounit); | |
a6568fe2 | 1736 | out: |
bccacf6c | 1737 | put_fid(pdu, fidp); |
84dfb926 | 1738 | out_nofid: |
dc295f83 | 1739 | pdu_complete(pdu, err); |
a6568fe2 AL |
1740 | } |
1741 | ||
8440e22e | 1742 | static void coroutine_fn v9fs_lcreate(void *opaque) |
c1568af5 VJ |
1743 | { |
1744 | int32_t dfid, flags, mode; | |
1745 | gid_t gid; | |
c1568af5 | 1746 | ssize_t err = 0; |
36f8981f | 1747 | ssize_t offset = 7; |
36f8981f VJ |
1748 | V9fsString name; |
1749 | V9fsFidState *fidp; | |
1750 | struct stat stbuf; | |
1751 | V9fsQID qid; | |
1752 | int32_t iounit; | |
1753 | V9fsPDU *pdu = opaque; | |
c1568af5 | 1754 | |
ddca7f86 MK |
1755 | v9fs_string_init(&name); |
1756 | err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, | |
1757 | &name, &flags, &mode, &gid); | |
1758 | if (err < 0) { | |
1759 | goto out_nofid; | |
1760 | } | |
c572f23a | 1761 | trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); |
c1568af5 | 1762 | |
fff39a7a GK |
1763 | if (name_is_illegal(name.data)) { |
1764 | err = -ENOENT; | |
1765 | goto out_nofid; | |
1766 | } | |
1767 | ||
805b5d98 GK |
1768 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
1769 | err = -EEXIST; | |
1770 | goto out_nofid; | |
1771 | } | |
1772 | ||
bccacf6c | 1773 | fidp = get_fid(pdu, dfid); |
36f8981f | 1774 | if (fidp == NULL) { |
c1568af5 | 1775 | err = -ENOENT; |
84dfb926 | 1776 | goto out_nofid; |
c1568af5 | 1777 | } |
d63fb193 LQ |
1778 | if (fidp->fid_type != P9_FID_NONE) { |
1779 | err = -EINVAL; | |
1780 | goto out; | |
1781 | } | |
c1568af5 | 1782 | |
d3ab98e6 | 1783 | flags = get_dotl_openflags(pdu->s, flags); |
bccacf6c | 1784 | err = v9fs_co_open2(pdu, fidp, &name, gid, |
02cb7f3a | 1785 | flags | O_CREAT, mode, &stbuf); |
36f8981f VJ |
1786 | if (err < 0) { |
1787 | goto out; | |
1788 | } | |
1789 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
1790 | fidp->open_flags = flags; |
1791 | if (flags & O_EXCL) { | |
1792 | /* | |
1793 | * We let the host file system do O_EXCL check | |
1794 | * We should not reclaim such fd | |
1795 | */ | |
1796 | fidp->flags |= FID_NON_RECLAIMABLE; | |
1797 | } | |
bccacf6c | 1798 | iounit = get_iounit(pdu, &fidp->path); |
3b5ee9e8 AM |
1799 | err = stat_to_qid(pdu, &stbuf, &qid); |
1800 | if (err < 0) { | |
1801 | goto out; | |
1802 | } | |
ddca7f86 MK |
1803 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
1804 | if (err < 0) { | |
1805 | goto out; | |
1806 | } | |
1807 | err += offset; | |
7999f7e1 AK |
1808 | trace_v9fs_lcreate_return(pdu->tag, pdu->id, |
1809 | qid.type, qid.version, qid.path, iounit); | |
c1568af5 | 1810 | out: |
bccacf6c | 1811 | put_fid(pdu, fidp); |
84dfb926 | 1812 | out_nofid: |
dc295f83 | 1813 | pdu_complete(pdu, err); |
36f8981f | 1814 | v9fs_string_free(&name); |
c1568af5 VJ |
1815 | } |
1816 | ||
a1bf8b74 | 1817 | static void coroutine_fn v9fs_fsync(void *opaque) |
b41e95d3 | 1818 | { |
4e9ad444 | 1819 | int err; |
b41e95d3 | 1820 | int32_t fid; |
4e9ad444 | 1821 | int datasync; |
b41e95d3 VJ |
1822 | size_t offset = 7; |
1823 | V9fsFidState *fidp; | |
4e9ad444 | 1824 | V9fsPDU *pdu = opaque; |
b41e95d3 | 1825 | |
ddca7f86 MK |
1826 | err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); |
1827 | if (err < 0) { | |
1828 | goto out_nofid; | |
1829 | } | |
c572f23a HPB |
1830 | trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); |
1831 | ||
bccacf6c | 1832 | fidp = get_fid(pdu, fid); |
b41e95d3 VJ |
1833 | if (fidp == NULL) { |
1834 | err = -ENOENT; | |
84dfb926 | 1835 | goto out_nofid; |
b41e95d3 | 1836 | } |
bccacf6c | 1837 | err = v9fs_co_fsync(pdu, fidp, datasync); |
4e9ad444 AK |
1838 | if (!err) { |
1839 | err = offset; | |
1840 | } | |
bccacf6c | 1841 | put_fid(pdu, fidp); |
84dfb926 | 1842 | out_nofid: |
dc295f83 | 1843 | pdu_complete(pdu, err); |
b41e95d3 VJ |
1844 | } |
1845 | ||
8440e22e | 1846 | static void coroutine_fn v9fs_clunk(void *opaque) |
a6568fe2 | 1847 | { |
c540ee51 | 1848 | int err; |
bbd5697b AL |
1849 | int32_t fid; |
1850 | size_t offset = 7; | |
84dfb926 | 1851 | V9fsFidState *fidp; |
c540ee51 AK |
1852 | V9fsPDU *pdu = opaque; |
1853 | V9fsState *s = pdu->s; | |
bbd5697b | 1854 | |
ddca7f86 MK |
1855 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
1856 | if (err < 0) { | |
1857 | goto out_nofid; | |
1858 | } | |
c572f23a | 1859 | trace_v9fs_clunk(pdu->tag, pdu->id, fid); |
84dfb926 | 1860 | |
ce421a19 | 1861 | fidp = clunk_fid(s, fid); |
84dfb926 AK |
1862 | if (fidp == NULL) { |
1863 | err = -ENOENT; | |
1864 | goto out_nofid; | |
1865 | } | |
ce421a19 AK |
1866 | /* |
1867 | * Bump the ref so that put_fid will | |
1868 | * free the fid. | |
1869 | */ | |
1870 | fidp->ref++; | |
a911a182 AK |
1871 | err = put_fid(pdu, fidp); |
1872 | if (!err) { | |
1873 | err = offset; | |
1874 | } | |
84dfb926 | 1875 | out_nofid: |
dc295f83 | 1876 | pdu_complete(pdu, err); |
9f107513 AL |
1877 | } |
1878 | ||
bcb8998f SS |
1879 | /* |
1880 | * Create a QEMUIOVector for a sub-region of PDU iovecs | |
1881 | * | |
1882 | * @qiov: uninitialized QEMUIOVector | |
1883 | * @skip: number of bytes to skip from beginning of PDU | |
1884 | * @size: number of bytes to include | |
1885 | * @is_write: true - write, false - read | |
1886 | * | |
1887 | * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up | |
1888 | * with qemu_iovec_destroy(). | |
1889 | */ | |
1890 | static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, | |
1891 | size_t skip, size_t size, | |
1892 | bool is_write) | |
1893 | { | |
1894 | QEMUIOVector elem; | |
1895 | struct iovec *iov; | |
1896 | unsigned int niov; | |
1897 | ||
88da0b03 | 1898 | if (is_write) { |
8d37de41 | 1899 | pdu->s->transport->init_out_iov_from_pdu(pdu, &iov, &niov, size + skip); |
88da0b03 | 1900 | } else { |
fa0eb5c5 | 1901 | pdu->s->transport->init_in_iov_from_pdu(pdu, &iov, &niov, size + skip); |
88da0b03 | 1902 | } |
bcb8998f SS |
1903 | |
1904 | qemu_iovec_init_external(&elem, iov, niov); | |
1905 | qemu_iovec_init(qiov, niov); | |
1906 | qemu_iovec_concat(qiov, &elem, skip, size); | |
1907 | } | |
1908 | ||
2f008a8c AK |
1909 | static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
1910 | uint64_t off, uint32_t max_count) | |
a9231555 | 1911 | { |
ddca7f86 | 1912 | ssize_t err; |
d208a0e0 | 1913 | size_t offset = 7; |
7e55d65c | 1914 | uint64_t read_count; |
bcb8998f | 1915 | QEMUIOVector qiov_full; |
a9231555 | 1916 | |
7e55d65c LQ |
1917 | if (fidp->fs.xattr.len < off) { |
1918 | read_count = 0; | |
1919 | } else { | |
1920 | read_count = fidp->fs.xattr.len - off; | |
1921 | } | |
d208a0e0 AK |
1922 | if (read_count > max_count) { |
1923 | read_count = max_count; | |
a9231555 | 1924 | } |
ddca7f86 MK |
1925 | err = pdu_marshal(pdu, offset, "d", read_count); |
1926 | if (err < 0) { | |
1927 | return err; | |
1928 | } | |
1929 | offset += err; | |
00588a0a | 1930 | |
fa0eb5c5 GK |
1931 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, read_count, false); |
1932 | err = v9fs_pack(qiov_full.iov, qiov_full.niov, 0, | |
ddca7f86 MK |
1933 | ((char *)fidp->fs.xattr.value) + off, |
1934 | read_count); | |
bcb8998f | 1935 | qemu_iovec_destroy(&qiov_full); |
ddca7f86 MK |
1936 | if (err < 0) { |
1937 | return err; | |
1938 | } | |
1939 | offset += err; | |
d208a0e0 | 1940 | return offset; |
a9231555 AL |
1941 | } |
1942 | ||
8440e22e GK |
1943 | static int coroutine_fn v9fs_do_readdir_with_stat(V9fsPDU *pdu, |
1944 | V9fsFidState *fidp, | |
1945 | uint32_t max_count) | |
a9231555 | 1946 | { |
2289be19 | 1947 | V9fsPath path; |
d208a0e0 AK |
1948 | V9fsStat v9stat; |
1949 | int len, err = 0; | |
1950 | int32_t count = 0; | |
1951 | struct stat stbuf; | |
1952 | off_t saved_dir_pos; | |
635324e8 | 1953 | struct dirent *dent; |
a9231555 | 1954 | |
d208a0e0 | 1955 | /* save the directory position */ |
bccacf6c | 1956 | saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
d208a0e0 AK |
1957 | if (saved_dir_pos < 0) { |
1958 | return saved_dir_pos; | |
a9231555 | 1959 | } |
5f524c1e | 1960 | |
d208a0e0 | 1961 | while (1) { |
2289be19 | 1962 | v9fs_path_init(&path); |
7cde47d4 GK |
1963 | |
1964 | v9fs_readdir_lock(&fidp->fs.dir); | |
1965 | ||
635324e8 GK |
1966 | err = v9fs_co_readdir(pdu, fidp, &dent); |
1967 | if (err || !dent) { | |
d208a0e0 AK |
1968 | break; |
1969 | } | |
bccacf6c | 1970 | err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); |
d208a0e0 | 1971 | if (err < 0) { |
8762a46d | 1972 | break; |
d208a0e0 | 1973 | } |
bccacf6c | 1974 | err = v9fs_co_lstat(pdu, &path, &stbuf); |
2289be19 | 1975 | if (err < 0) { |
8762a46d | 1976 | break; |
2289be19 | 1977 | } |
6069537f | 1978 | err = stat_to_v9stat(pdu, &path, dent->d_name, &stbuf, &v9stat); |
d208a0e0 | 1979 | if (err < 0) { |
8762a46d | 1980 | break; |
a9231555 | 1981 | } |
772a7369 JD |
1982 | if ((count + v9stat.size + 2) > max_count) { |
1983 | v9fs_readdir_unlock(&fidp->fs.dir); | |
1984 | ||
1985 | /* Ran out of buffer. Set dir back to old position and return */ | |
1986 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); | |
1987 | v9fs_stat_free(&v9stat); | |
1988 | v9fs_path_free(&path); | |
1989 | return count; | |
1990 | } | |
1991 | ||
d208a0e0 AK |
1992 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
1993 | len = pdu_marshal(pdu, 11 + count, "S", &v9stat); | |
7cde47d4 GK |
1994 | |
1995 | v9fs_readdir_unlock(&fidp->fs.dir); | |
1996 | ||
772a7369 | 1997 | if (len < 0) { |
bccacf6c | 1998 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
d208a0e0 | 1999 | v9fs_stat_free(&v9stat); |
2289be19 | 2000 | v9fs_path_free(&path); |
772a7369 | 2001 | return len; |
d208a0e0 AK |
2002 | } |
2003 | count += len; | |
2004 | v9fs_stat_free(&v9stat); | |
2289be19 | 2005 | v9fs_path_free(&path); |
d208a0e0 | 2006 | saved_dir_pos = dent->d_off; |
a9231555 | 2007 | } |
8762a46d | 2008 | |
7cde47d4 GK |
2009 | v9fs_readdir_unlock(&fidp->fs.dir); |
2010 | ||
2289be19 | 2011 | v9fs_path_free(&path); |
d208a0e0 AK |
2012 | if (err < 0) { |
2013 | return err; | |
fa32ef88 | 2014 | } |
d208a0e0 | 2015 | return count; |
fa32ef88 AK |
2016 | } |
2017 | ||
8440e22e | 2018 | static void coroutine_fn v9fs_read(void *opaque) |
9f107513 | 2019 | { |
a9231555 | 2020 | int32_t fid; |
2f008a8c | 2021 | uint64_t off; |
a9231555 | 2022 | ssize_t err = 0; |
d208a0e0 AK |
2023 | int32_t count = 0; |
2024 | size_t offset = 7; | |
2f008a8c | 2025 | uint32_t max_count; |
d208a0e0 AK |
2026 | V9fsFidState *fidp; |
2027 | V9fsPDU *pdu = opaque; | |
2028 | V9fsState *s = pdu->s; | |
a9231555 | 2029 | |
ddca7f86 MK |
2030 | err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); |
2031 | if (err < 0) { | |
2032 | goto out_nofid; | |
2033 | } | |
c572f23a | 2034 | trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); |
84dfb926 | 2035 | |
bccacf6c | 2036 | fidp = get_fid(pdu, fid); |
d208a0e0 | 2037 | if (fidp == NULL) { |
a9231555 | 2038 | err = -EINVAL; |
84dfb926 | 2039 | goto out_nofid; |
a9231555 | 2040 | } |
d208a0e0 | 2041 | if (fidp->fid_type == P9_FID_DIR) { |
a9231555 | 2042 | |
d208a0e0 | 2043 | if (off == 0) { |
bccacf6c | 2044 | v9fs_co_rewinddir(pdu, fidp); |
a9231555 | 2045 | } |
bccacf6c | 2046 | count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); |
d208a0e0 AK |
2047 | if (count < 0) { |
2048 | err = count; | |
2049 | goto out; | |
56d15a53 | 2050 | } |
ddca7f86 MK |
2051 | err = pdu_marshal(pdu, offset, "d", count); |
2052 | if (err < 0) { | |
2053 | goto out; | |
2054 | } | |
2055 | err += offset + count; | |
d208a0e0 | 2056 | } else if (fidp->fid_type == P9_FID_FILE) { |
302a0d3e SH |
2057 | QEMUIOVector qiov_full; |
2058 | QEMUIOVector qiov; | |
d208a0e0 | 2059 | int32_t len; |
d208a0e0 | 2060 | |
302a0d3e SH |
2061 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); |
2062 | qemu_iovec_init(&qiov, qiov_full.niov); | |
d208a0e0 | 2063 | do { |
302a0d3e | 2064 | qemu_iovec_reset(&qiov); |
1b093c48 | 2065 | qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); |
d208a0e0 | 2066 | if (0) { |
302a0d3e | 2067 | print_sg(qiov.iov, qiov.niov); |
d208a0e0 AK |
2068 | } |
2069 | /* Loop in case of EINTR */ | |
2070 | do { | |
302a0d3e | 2071 | len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); |
d208a0e0 AK |
2072 | if (len >= 0) { |
2073 | off += len; | |
2074 | count += len; | |
2075 | } | |
bccacf6c | 2076 | } while (len == -EINTR && !pdu->cancelled); |
d208a0e0 AK |
2077 | if (len < 0) { |
2078 | /* IO error return the error */ | |
2079 | err = len; | |
e95c9a49 | 2080 | goto out_free_iovec; |
d208a0e0 | 2081 | } |
d208a0e0 | 2082 | } while (count < max_count && len > 0); |
ddca7f86 MK |
2083 | err = pdu_marshal(pdu, offset, "d", count); |
2084 | if (err < 0) { | |
e95c9a49 | 2085 | goto out_free_iovec; |
ddca7f86 MK |
2086 | } |
2087 | err += offset + count; | |
e95c9a49 | 2088 | out_free_iovec: |
302a0d3e SH |
2089 | qemu_iovec_destroy(&qiov); |
2090 | qemu_iovec_destroy(&qiov_full); | |
d208a0e0 AK |
2091 | } else if (fidp->fid_type == P9_FID_XATTR) { |
2092 | err = v9fs_xattr_read(s, pdu, fidp, off, max_count); | |
a9231555 AL |
2093 | } else { |
2094 | err = -EINVAL; | |
9f107513 | 2095 | } |
7999f7e1 | 2096 | trace_v9fs_read_return(pdu->tag, pdu->id, count, err); |
a9231555 | 2097 | out: |
bccacf6c | 2098 | put_fid(pdu, fidp); |
84dfb926 | 2099 | out_nofid: |
dc295f83 | 2100 | pdu_complete(pdu, err); |
9f107513 AL |
2101 | } |
2102 | ||
5e4eaa79 | 2103 | static size_t v9fs_readdir_data_size(V9fsString *name) |
c18e2f94 | 2104 | { |
5e4eaa79 AK |
2105 | /* |
2106 | * Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
2107 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
2108 | */ | |
2109 | return 24 + v9fs_string_size(name); | |
c18e2f94 SK |
2110 | } |
2111 | ||
8440e22e GK |
2112 | static int coroutine_fn v9fs_do_readdir(V9fsPDU *pdu, V9fsFidState *fidp, |
2113 | int32_t max_count) | |
c18e2f94 | 2114 | { |
c18e2f94 | 2115 | size_t size; |
5e4eaa79 AK |
2116 | V9fsQID qid; |
2117 | V9fsString name; | |
2118 | int len, err = 0; | |
2119 | int32_t count = 0; | |
2120 | off_t saved_dir_pos; | |
635324e8 | 2121 | struct dirent *dent; |
c18e2f94 | 2122 | |
5e4eaa79 | 2123 | /* save the directory position */ |
bccacf6c | 2124 | saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
5e4eaa79 AK |
2125 | if (saved_dir_pos < 0) { |
2126 | return saved_dir_pos; | |
2127 | } | |
5f524c1e | 2128 | |
5e4eaa79 | 2129 | while (1) { |
7cde47d4 GK |
2130 | v9fs_readdir_lock(&fidp->fs.dir); |
2131 | ||
635324e8 GK |
2132 | err = v9fs_co_readdir(pdu, fidp, &dent); |
2133 | if (err || !dent) { | |
5e4eaa79 AK |
2134 | break; |
2135 | } | |
2136 | v9fs_string_init(&name); | |
2137 | v9fs_string_sprintf(&name, "%s", dent->d_name); | |
2138 | if ((count + v9fs_readdir_data_size(&name)) > max_count) { | |
7cde47d4 GK |
2139 | v9fs_readdir_unlock(&fidp->fs.dir); |
2140 | ||
c18e2f94 | 2141 | /* Ran out of buffer. Set dir back to old position and return */ |
bccacf6c | 2142 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
5e4eaa79 AK |
2143 | v9fs_string_free(&name); |
2144 | return count; | |
c18e2f94 | 2145 | } |
1a6ed33c AM |
2146 | |
2147 | if (pdu->s->ctx.export_flags & V9FS_REMAP_INODES) { | |
2148 | /* | |
2149 | * dirent_to_qid() implies expensive stat call for each entry, | |
2150 | * we must do that here though since inode remapping requires | |
2151 | * the device id, which in turn might be different for | |
2152 | * different entries; we cannot make any assumption to avoid | |
2153 | * that here. | |
2154 | */ | |
2155 | err = dirent_to_qid(pdu, fidp, dent, &qid); | |
2156 | if (err < 0) { | |
2157 | v9fs_readdir_unlock(&fidp->fs.dir); | |
2158 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); | |
2159 | v9fs_string_free(&name); | |
2160 | return err; | |
2161 | } | |
2162 | } else { | |
2163 | /* | |
2164 | * Fill up just the path field of qid because the client uses | |
2165 | * only that. To fill the entire qid structure we will have | |
2166 | * to stat each dirent found, which is expensive. For the | |
2167 | * latter reason we don't call dirent_to_qid() here. Only drawback | |
2168 | * is that no multi-device export detection of stat_to_qid() | |
2169 | * would be done and provided as error to the user here. But | |
2170 | * user would get that error anyway when accessing those | |
2171 | * files/dirs through other ways. | |
2172 | */ | |
2173 | size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); | |
2174 | memcpy(&qid.path, &dent->d_ino, size); | |
2175 | /* Fill the other fields with dummy values */ | |
2176 | qid.type = 0; | |
2177 | qid.version = 0; | |
2178 | } | |
c18e2f94 | 2179 | |
5e4eaa79 AK |
2180 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
2181 | len = pdu_marshal(pdu, 11 + count, "Qqbs", | |
2182 | &qid, dent->d_off, | |
2183 | dent->d_type, &name); | |
7cde47d4 GK |
2184 | |
2185 | v9fs_readdir_unlock(&fidp->fs.dir); | |
2186 | ||
ddca7f86 MK |
2187 | if (len < 0) { |
2188 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); | |
2189 | v9fs_string_free(&name); | |
ddca7f86 MK |
2190 | return len; |
2191 | } | |
5e4eaa79 AK |
2192 | count += len; |
2193 | v9fs_string_free(&name); | |
2194 | saved_dir_pos = dent->d_off; | |
2195 | } | |
7cde47d4 GK |
2196 | |
2197 | v9fs_readdir_unlock(&fidp->fs.dir); | |
2198 | ||
5e4eaa79 AK |
2199 | if (err < 0) { |
2200 | return err; | |
2201 | } | |
2202 | return count; | |
c18e2f94 SK |
2203 | } |
2204 | ||
8440e22e | 2205 | static void coroutine_fn v9fs_readdir(void *opaque) |
c18e2f94 SK |
2206 | { |
2207 | int32_t fid; | |
5e4eaa79 AK |
2208 | V9fsFidState *fidp; |
2209 | ssize_t retval = 0; | |
c18e2f94 | 2210 | size_t offset = 7; |
2f008a8c AK |
2211 | uint64_t initial_offset; |
2212 | int32_t count; | |
2213 | uint32_t max_count; | |
5e4eaa79 | 2214 | V9fsPDU *pdu = opaque; |
c18e2f94 | 2215 | |
ddca7f86 MK |
2216 | retval = pdu_unmarshal(pdu, offset, "dqd", &fid, |
2217 | &initial_offset, &max_count); | |
2218 | if (retval < 0) { | |
2219 | goto out_nofid; | |
2220 | } | |
c572f23a HPB |
2221 | trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); |
2222 | ||
bccacf6c | 2223 | fidp = get_fid(pdu, fid); |
84dfb926 AK |
2224 | if (fidp == NULL) { |
2225 | retval = -EINVAL; | |
2226 | goto out_nofid; | |
2227 | } | |
f314ea4e | 2228 | if (!fidp->fs.dir.stream) { |
5e4eaa79 | 2229 | retval = -EINVAL; |
c18e2f94 SK |
2230 | goto out; |
2231 | } | |
5e4eaa79 | 2232 | if (initial_offset == 0) { |
bccacf6c | 2233 | v9fs_co_rewinddir(pdu, fidp); |
c18e2f94 | 2234 | } else { |
bccacf6c | 2235 | v9fs_co_seekdir(pdu, fidp, initial_offset); |
c18e2f94 | 2236 | } |
bccacf6c | 2237 | count = v9fs_do_readdir(pdu, fidp, max_count); |
5e4eaa79 AK |
2238 | if (count < 0) { |
2239 | retval = count; | |
2240 | goto out; | |
2241 | } | |
ddca7f86 MK |
2242 | retval = pdu_marshal(pdu, offset, "d", count); |
2243 | if (retval < 0) { | |
2244 | goto out; | |
2245 | } | |
2246 | retval += count + offset; | |
7999f7e1 | 2247 | trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); |
c18e2f94 | 2248 | out: |
bccacf6c | 2249 | put_fid(pdu, fidp); |
84dfb926 | 2250 | out_nofid: |
dc295f83 | 2251 | pdu_complete(pdu, retval); |
c18e2f94 SK |
2252 | } |
2253 | ||
d7a90491 | 2254 | static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
2f008a8c | 2255 | uint64_t off, uint32_t count, |
d7a90491 | 2256 | struct iovec *sg, int cnt) |
10b468bd AK |
2257 | { |
2258 | int i, to_copy; | |
2259 | ssize_t err = 0; | |
7e55d65c | 2260 | uint64_t write_count; |
d7a90491 | 2261 | size_t offset = 7; |
10b468bd | 2262 | |
d7a90491 | 2263 | |
7e55d65c | 2264 | if (fidp->fs.xattr.len < off) { |
10b468bd AK |
2265 | err = -ENOSPC; |
2266 | goto out; | |
2267 | } | |
7e55d65c LQ |
2268 | write_count = fidp->fs.xattr.len - off; |
2269 | if (write_count > count) { | |
2270 | write_count = count; | |
2271 | } | |
ddca7f86 MK |
2272 | err = pdu_marshal(pdu, offset, "d", write_count); |
2273 | if (err < 0) { | |
2274 | return err; | |
2275 | } | |
2276 | err += offset; | |
d7a90491 | 2277 | fidp->fs.xattr.copied_len += write_count; |
10b468bd AK |
2278 | /* |
2279 | * Now copy the content from sg list | |
2280 | */ | |
d7a90491 AK |
2281 | for (i = 0; i < cnt; i++) { |
2282 | if (write_count > sg[i].iov_len) { | |
2283 | to_copy = sg[i].iov_len; | |
10b468bd AK |
2284 | } else { |
2285 | to_copy = write_count; | |
2286 | } | |
d7a90491 | 2287 | memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); |
10b468bd | 2288 | /* updating vs->off since we are not using below */ |
d7a90491 | 2289 | off += to_copy; |
10b468bd AK |
2290 | write_count -= to_copy; |
2291 | } | |
2292 | out: | |
d7a90491 | 2293 | return err; |
10b468bd AK |
2294 | } |
2295 | ||
8440e22e | 2296 | static void coroutine_fn v9fs_write(void *opaque) |
9f107513 | 2297 | { |
d7a90491 AK |
2298 | ssize_t err; |
2299 | int32_t fid; | |
2f008a8c AK |
2300 | uint64_t off; |
2301 | uint32_t count; | |
d7a90491 AK |
2302 | int32_t len = 0; |
2303 | int32_t total = 0; | |
2304 | size_t offset = 7; | |
2305 | V9fsFidState *fidp; | |
ff06030f VJ |
2306 | V9fsPDU *pdu = opaque; |
2307 | V9fsState *s = pdu->s; | |
302a0d3e SH |
2308 | QEMUIOVector qiov_full; |
2309 | QEMUIOVector qiov; | |
8449360c | 2310 | |
ddca7f86 MK |
2311 | err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); |
2312 | if (err < 0) { | |
dc295f83 | 2313 | pdu_complete(pdu, err); |
0289a412 | 2314 | return; |
ddca7f86 MK |
2315 | } |
2316 | offset += err; | |
302a0d3e SH |
2317 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); |
2318 | trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); | |
84dfb926 | 2319 | |
bccacf6c | 2320 | fidp = get_fid(pdu, fid); |
d7a90491 | 2321 | if (fidp == NULL) { |
8449360c | 2322 | err = -EINVAL; |
84dfb926 | 2323 | goto out_nofid; |
9f107513 | 2324 | } |
d7a90491 AK |
2325 | if (fidp->fid_type == P9_FID_FILE) { |
2326 | if (fidp->fs.fd == -1) { | |
10b468bd AK |
2327 | err = -EINVAL; |
2328 | goto out; | |
2329 | } | |
d7a90491 | 2330 | } else if (fidp->fid_type == P9_FID_XATTR) { |
10b468bd AK |
2331 | /* |
2332 | * setxattr operation | |
2333 | */ | |
302a0d3e SH |
2334 | err = v9fs_xattr_write(s, pdu, fidp, off, count, |
2335 | qiov_full.iov, qiov_full.niov); | |
d7a90491 | 2336 | goto out; |
10b468bd | 2337 | } else { |
8449360c AL |
2338 | err = -EINVAL; |
2339 | goto out; | |
2340 | } | |
302a0d3e | 2341 | qemu_iovec_init(&qiov, qiov_full.niov); |
d7a90491 | 2342 | do { |
302a0d3e | 2343 | qemu_iovec_reset(&qiov); |
1b093c48 | 2344 | qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); |
d7a90491 | 2345 | if (0) { |
302a0d3e | 2346 | print_sg(qiov.iov, qiov.niov); |
56d15a53 | 2347 | } |
d7a90491 AK |
2348 | /* Loop in case of EINTR */ |
2349 | do { | |
302a0d3e | 2350 | len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); |
d7a90491 AK |
2351 | if (len >= 0) { |
2352 | off += len; | |
2353 | total += len; | |
2354 | } | |
bccacf6c | 2355 | } while (len == -EINTR && !pdu->cancelled); |
d7a90491 AK |
2356 | if (len < 0) { |
2357 | /* IO error return the error */ | |
2358 | err = len; | |
302a0d3e | 2359 | goto out_qiov; |
d7a90491 | 2360 | } |
d7a90491 | 2361 | } while (total < count && len > 0); |
302a0d3e SH |
2362 | |
2363 | offset = 7; | |
ddca7f86 MK |
2364 | err = pdu_marshal(pdu, offset, "d", total); |
2365 | if (err < 0) { | |
fdfcc9ae | 2366 | goto out_qiov; |
ddca7f86 MK |
2367 | } |
2368 | err += offset; | |
7999f7e1 | 2369 | trace_v9fs_write_return(pdu->tag, pdu->id, total, err); |
302a0d3e SH |
2370 | out_qiov: |
2371 | qemu_iovec_destroy(&qiov); | |
8449360c | 2372 | out: |
bccacf6c | 2373 | put_fid(pdu, fidp); |
84dfb926 | 2374 | out_nofid: |
302a0d3e | 2375 | qemu_iovec_destroy(&qiov_full); |
dc295f83 | 2376 | pdu_complete(pdu, err); |
9f107513 AL |
2377 | } |
2378 | ||
8440e22e | 2379 | static void coroutine_fn v9fs_create(void *opaque) |
5e94c103 | 2380 | { |
baaa86d9 VJ |
2381 | int32_t fid; |
2382 | int err = 0; | |
2383 | size_t offset = 7; | |
2384 | V9fsFidState *fidp; | |
2385 | V9fsQID qid; | |
2386 | int32_t perm; | |
2387 | int8_t mode; | |
2289be19 | 2388 | V9fsPath path; |
baaa86d9 VJ |
2389 | struct stat stbuf; |
2390 | V9fsString name; | |
2391 | V9fsString extension; | |
baaa86d9 VJ |
2392 | int iounit; |
2393 | V9fsPDU *pdu = opaque; | |
5b3c77aa | 2394 | V9fsState *s = pdu->s; |
c494dd6f | 2395 | |
2289be19 | 2396 | v9fs_path_init(&path); |
ddca7f86 MK |
2397 | v9fs_string_init(&name); |
2398 | v9fs_string_init(&extension); | |
2399 | err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, | |
2400 | &perm, &mode, &extension); | |
2401 | if (err < 0) { | |
2402 | goto out_nofid; | |
2403 | } | |
c572f23a HPB |
2404 | trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); |
2405 | ||
fff39a7a GK |
2406 | if (name_is_illegal(name.data)) { |
2407 | err = -ENOENT; | |
2408 | goto out_nofid; | |
2409 | } | |
2410 | ||
805b5d98 GK |
2411 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2412 | err = -EEXIST; | |
2413 | goto out_nofid; | |
2414 | } | |
2415 | ||
bccacf6c | 2416 | fidp = get_fid(pdu, fid); |
baaa86d9 VJ |
2417 | if (fidp == NULL) { |
2418 | err = -EINVAL; | |
84dfb926 | 2419 | goto out_nofid; |
c494dd6f | 2420 | } |
d63fb193 LQ |
2421 | if (fidp->fid_type != P9_FID_NONE) { |
2422 | err = -EINVAL; | |
2423 | goto out; | |
2424 | } | |
baaa86d9 | 2425 | if (perm & P9_STAT_MODE_DIR) { |
bccacf6c | 2426 | err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, |
02cb7f3a | 2427 | fidp->uid, -1, &stbuf); |
baaa86d9 VJ |
2428 | if (err < 0) { |
2429 | goto out; | |
2430 | } | |
bccacf6c | 2431 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2432 | if (err < 0) { |
2433 | goto out; | |
2434 | } | |
5b3c77aa | 2435 | v9fs_path_write_lock(s); |
2289be19 | 2436 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2437 | v9fs_path_unlock(s); |
bccacf6c | 2438 | err = v9fs_co_opendir(pdu, fidp); |
baaa86d9 VJ |
2439 | if (err < 0) { |
2440 | goto out; | |
2441 | } | |
2442 | fidp->fid_type = P9_FID_DIR; | |
2443 | } else if (perm & P9_STAT_MODE_SYMLINK) { | |
bccacf6c | 2444 | err = v9fs_co_symlink(pdu, fidp, &name, |
02cb7f3a | 2445 | extension.data, -1 , &stbuf); |
baaa86d9 | 2446 | if (err < 0) { |
baaa86d9 VJ |
2447 | goto out; |
2448 | } | |
bccacf6c | 2449 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2450 | if (err < 0) { |
2451 | goto out; | |
2452 | } | |
5b3c77aa | 2453 | v9fs_path_write_lock(s); |
2289be19 | 2454 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2455 | v9fs_path_unlock(s); |
baaa86d9 | 2456 | } else if (perm & P9_STAT_MODE_LINK) { |
2289be19 | 2457 | int32_t ofid = atoi(extension.data); |
bccacf6c | 2458 | V9fsFidState *ofidp = get_fid(pdu, ofid); |
2289be19 | 2459 | if (ofidp == NULL) { |
baaa86d9 VJ |
2460 | err = -EINVAL; |
2461 | goto out; | |
2462 | } | |
bccacf6c AK |
2463 | err = v9fs_co_link(pdu, ofidp, fidp, &name); |
2464 | put_fid(pdu, ofidp); | |
2289be19 AK |
2465 | if (err < 0) { |
2466 | goto out; | |
2467 | } | |
bccacf6c | 2468 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
baaa86d9 | 2469 | if (err < 0) { |
2289be19 | 2470 | fidp->fid_type = P9_FID_NONE; |
baaa86d9 | 2471 | goto out; |
c494dd6f | 2472 | } |
5b3c77aa | 2473 | v9fs_path_write_lock(s); |
2289be19 | 2474 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2475 | v9fs_path_unlock(s); |
bccacf6c | 2476 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
02cb7f3a AK |
2477 | if (err < 0) { |
2478 | fidp->fid_type = P9_FID_NONE; | |
2479 | goto out; | |
2480 | } | |
baaa86d9 | 2481 | } else if (perm & P9_STAT_MODE_DEVICE) { |
c494dd6f AL |
2482 | char ctype; |
2483 | uint32_t major, minor; | |
2484 | mode_t nmode = 0; | |
2485 | ||
baaa86d9 | 2486 | if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { |
c494dd6f | 2487 | err = -errno; |
baaa86d9 | 2488 | goto out; |
c494dd6f AL |
2489 | } |
2490 | ||
2491 | switch (ctype) { | |
2492 | case 'c': | |
2493 | nmode = S_IFCHR; | |
2494 | break; | |
2495 | case 'b': | |
2496 | nmode = S_IFBLK; | |
2497 | break; | |
2498 | default: | |
2499 | err = -EIO; | |
baaa86d9 VJ |
2500 | goto out; |
2501 | } | |
c1568af5 | 2502 | |
baaa86d9 | 2503 | nmode |= perm & 0777; |
bccacf6c | 2504 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2505 | makedev(major, minor), nmode, &stbuf); |
baaa86d9 VJ |
2506 | if (err < 0) { |
2507 | goto out; | |
2508 | } | |
bccacf6c | 2509 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2510 | if (err < 0) { |
2511 | goto out; | |
2512 | } | |
5b3c77aa | 2513 | v9fs_path_write_lock(s); |
2289be19 | 2514 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2515 | v9fs_path_unlock(s); |
baaa86d9 | 2516 | } else if (perm & P9_STAT_MODE_NAMED_PIPE) { |
bccacf6c | 2517 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2518 | 0, S_IFIFO | (perm & 0777), &stbuf); |
baaa86d9 VJ |
2519 | if (err < 0) { |
2520 | goto out; | |
2521 | } | |
bccacf6c | 2522 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2523 | if (err < 0) { |
2524 | goto out; | |
2525 | } | |
5b3c77aa | 2526 | v9fs_path_write_lock(s); |
2289be19 | 2527 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2528 | v9fs_path_unlock(s); |
baaa86d9 | 2529 | } else if (perm & P9_STAT_MODE_SOCKET) { |
bccacf6c | 2530 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2531 | 0, S_IFSOCK | (perm & 0777), &stbuf); |
baaa86d9 VJ |
2532 | if (err < 0) { |
2533 | goto out; | |
2534 | } | |
bccacf6c | 2535 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2536 | if (err < 0) { |
2537 | goto out; | |
2538 | } | |
5b3c77aa | 2539 | v9fs_path_write_lock(s); |
2289be19 | 2540 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2541 | v9fs_path_unlock(s); |
baaa86d9 | 2542 | } else { |
bccacf6c | 2543 | err = v9fs_co_open2(pdu, fidp, &name, -1, |
02cb7f3a | 2544 | omode_to_uflags(mode)|O_CREAT, perm, &stbuf); |
baaa86d9 VJ |
2545 | if (err < 0) { |
2546 | goto out; | |
2547 | } | |
2548 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
2549 | fidp->open_flags = omode_to_uflags(mode); |
2550 | if (fidp->open_flags & O_EXCL) { | |
2551 | /* | |
2552 | * We let the host file system do O_EXCL check | |
2553 | * We should not reclaim such fd | |
2554 | */ | |
2555 | fidp->flags |= FID_NON_RECLAIMABLE; | |
2556 | } | |
c494dd6f | 2557 | } |
bccacf6c | 2558 | iounit = get_iounit(pdu, &fidp->path); |
3b5ee9e8 AM |
2559 | err = stat_to_qid(pdu, &stbuf, &qid); |
2560 | if (err < 0) { | |
2561 | goto out; | |
2562 | } | |
ddca7f86 MK |
2563 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
2564 | if (err < 0) { | |
2565 | goto out; | |
2566 | } | |
2567 | err += offset; | |
7999f7e1 AK |
2568 | trace_v9fs_create_return(pdu->tag, pdu->id, |
2569 | qid.type, qid.version, qid.path, iounit); | |
c494dd6f | 2570 | out: |
bccacf6c | 2571 | put_fid(pdu, fidp); |
84dfb926 | 2572 | out_nofid: |
dc295f83 | 2573 | pdu_complete(pdu, err); |
baaa86d9 VJ |
2574 | v9fs_string_free(&name); |
2575 | v9fs_string_free(&extension); | |
2289be19 | 2576 | v9fs_path_free(&path); |
9f107513 AL |
2577 | } |
2578 | ||
8440e22e | 2579 | static void coroutine_fn v9fs_symlink(void *opaque) |
08c60fc9 | 2580 | { |
ff06030f | 2581 | V9fsPDU *pdu = opaque; |
3fa2a8d1 VJ |
2582 | V9fsString name; |
2583 | V9fsString symname; | |
3fa2a8d1 VJ |
2584 | V9fsFidState *dfidp; |
2585 | V9fsQID qid; | |
2586 | struct stat stbuf; | |
08c60fc9 | 2587 | int32_t dfid; |
08c60fc9 VJ |
2588 | int err = 0; |
2589 | gid_t gid; | |
3fa2a8d1 | 2590 | size_t offset = 7; |
08c60fc9 | 2591 | |
ddca7f86 MK |
2592 | v9fs_string_init(&name); |
2593 | v9fs_string_init(&symname); | |
2594 | err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); | |
2595 | if (err < 0) { | |
2596 | goto out_nofid; | |
2597 | } | |
c572f23a | 2598 | trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); |
08c60fc9 | 2599 | |
fff39a7a GK |
2600 | if (name_is_illegal(name.data)) { |
2601 | err = -ENOENT; | |
2602 | goto out_nofid; | |
2603 | } | |
2604 | ||
805b5d98 GK |
2605 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2606 | err = -EEXIST; | |
2607 | goto out_nofid; | |
2608 | } | |
2609 | ||
bccacf6c | 2610 | dfidp = get_fid(pdu, dfid); |
3fa2a8d1 | 2611 | if (dfidp == NULL) { |
08c60fc9 | 2612 | err = -EINVAL; |
84dfb926 | 2613 | goto out_nofid; |
08c60fc9 | 2614 | } |
bccacf6c | 2615 | err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); |
3fa2a8d1 VJ |
2616 | if (err < 0) { |
2617 | goto out; | |
2618 | } | |
3b5ee9e8 AM |
2619 | err = stat_to_qid(pdu, &stbuf, &qid); |
2620 | if (err < 0) { | |
2621 | goto out; | |
2622 | } | |
ddca7f86 MK |
2623 | err = pdu_marshal(pdu, offset, "Q", &qid); |
2624 | if (err < 0) { | |
2625 | goto out; | |
2626 | } | |
2627 | err += offset; | |
7999f7e1 AK |
2628 | trace_v9fs_symlink_return(pdu->tag, pdu->id, |
2629 | qid.type, qid.version, qid.path); | |
08c60fc9 | 2630 | out: |
bccacf6c | 2631 | put_fid(pdu, dfidp); |
84dfb926 | 2632 | out_nofid: |
dc295f83 | 2633 | pdu_complete(pdu, err); |
3fa2a8d1 VJ |
2634 | v9fs_string_free(&name); |
2635 | v9fs_string_free(&symname); | |
08c60fc9 VJ |
2636 | } |
2637 | ||
a1bf8b74 | 2638 | static void coroutine_fn v9fs_flush(void *opaque) |
9f107513 | 2639 | { |
ddca7f86 | 2640 | ssize_t err; |
bccacf6c AK |
2641 | int16_t tag; |
2642 | size_t offset = 7; | |
d5f2af7b | 2643 | V9fsPDU *cancel_pdu = NULL; |
ff06030f VJ |
2644 | V9fsPDU *pdu = opaque; |
2645 | V9fsState *s = pdu->s; | |
bccacf6c | 2646 | |
ddca7f86 MK |
2647 | err = pdu_unmarshal(pdu, offset, "w", &tag); |
2648 | if (err < 0) { | |
dc295f83 | 2649 | pdu_complete(pdu, err); |
ddca7f86 MK |
2650 | return; |
2651 | } | |
c572f23a | 2652 | trace_v9fs_flush(pdu->tag, pdu->id, tag); |
bccacf6c | 2653 | |
d5f2af7b | 2654 | if (pdu->tag == tag) { |
3dc6f869 | 2655 | warn_report("the guest sent a self-referencing 9P flush request"); |
d5f2af7b GK |
2656 | } else { |
2657 | QLIST_FOREACH(cancel_pdu, &s->active_list, next) { | |
2658 | if (cancel_pdu->tag == tag) { | |
2659 | break; | |
2660 | } | |
bccacf6c AK |
2661 | } |
2662 | } | |
2663 | if (cancel_pdu) { | |
2664 | cancel_pdu->cancelled = 1; | |
2665 | /* | |
2666 | * Wait for pdu to complete. | |
2667 | */ | |
1ace7cea | 2668 | qemu_co_queue_wait(&cancel_pdu->complete, NULL); |
18adde86 GK |
2669 | if (!qemu_co_queue_next(&cancel_pdu->complete)) { |
2670 | cancel_pdu->cancelled = 0; | |
2671 | pdu_free(cancel_pdu); | |
2672 | } | |
bccacf6c | 2673 | } |
dc295f83 | 2674 | pdu_complete(pdu, 7); |
9f107513 AL |
2675 | } |
2676 | ||
8440e22e | 2677 | static void coroutine_fn v9fs_link(void *opaque) |
b2c224be | 2678 | { |
ff06030f | 2679 | V9fsPDU *pdu = opaque; |
b2c224be VJ |
2680 | int32_t dfid, oldfid; |
2681 | V9fsFidState *dfidp, *oldfidp; | |
3a93113a | 2682 | V9fsString name; |
b2c224be VJ |
2683 | size_t offset = 7; |
2684 | int err = 0; | |
2685 | ||
ddca7f86 MK |
2686 | v9fs_string_init(&name); |
2687 | err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); | |
2688 | if (err < 0) { | |
2689 | goto out_nofid; | |
2690 | } | |
c572f23a | 2691 | trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); |
b2c224be | 2692 | |
fff39a7a GK |
2693 | if (name_is_illegal(name.data)) { |
2694 | err = -ENOENT; | |
2695 | goto out_nofid; | |
2696 | } | |
2697 | ||
805b5d98 GK |
2698 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2699 | err = -EEXIST; | |
2700 | goto out_nofid; | |
2701 | } | |
2702 | ||
bccacf6c | 2703 | dfidp = get_fid(pdu, dfid); |
b2c224be | 2704 | if (dfidp == NULL) { |
ffd66876 | 2705 | err = -ENOENT; |
84dfb926 | 2706 | goto out_nofid; |
b2c224be VJ |
2707 | } |
2708 | ||
bccacf6c | 2709 | oldfidp = get_fid(pdu, oldfid); |
b2c224be | 2710 | if (oldfidp == NULL) { |
ffd66876 | 2711 | err = -ENOENT; |
b2c224be VJ |
2712 | goto out; |
2713 | } | |
bccacf6c | 2714 | err = v9fs_co_link(pdu, oldfidp, dfidp, &name); |
ffd66876 VJ |
2715 | if (!err) { |
2716 | err = offset; | |
b2c224be | 2717 | } |
4c158678 | 2718 | put_fid(pdu, oldfidp); |
b2c224be | 2719 | out: |
bccacf6c | 2720 | put_fid(pdu, dfidp); |
84dfb926 | 2721 | out_nofid: |
b2c224be | 2722 | v9fs_string_free(&name); |
dc295f83 | 2723 | pdu_complete(pdu, err); |
b2c224be VJ |
2724 | } |
2725 | ||
532decb7 | 2726 | /* Only works with path name based fid */ |
8440e22e | 2727 | static void coroutine_fn v9fs_remove(void *opaque) |
9f107513 | 2728 | { |
5bae1900 | 2729 | int32_t fid; |
5bae1900 | 2730 | int err = 0; |
ae1ef571 VJ |
2731 | size_t offset = 7; |
2732 | V9fsFidState *fidp; | |
2733 | V9fsPDU *pdu = opaque; | |
5bae1900 | 2734 | |
ddca7f86 MK |
2735 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
2736 | if (err < 0) { | |
2737 | goto out_nofid; | |
2738 | } | |
c572f23a | 2739 | trace_v9fs_remove(pdu->tag, pdu->id, fid); |
5bae1900 | 2740 | |
bccacf6c | 2741 | fidp = get_fid(pdu, fid); |
ae1ef571 | 2742 | if (fidp == NULL) { |
5bae1900 | 2743 | err = -EINVAL; |
84dfb926 | 2744 | goto out_nofid; |
9f107513 | 2745 | } |
532decb7 | 2746 | /* if fs driver is not path based, return EOPNOTSUPP */ |
c98f1d4a | 2747 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { |
532decb7 AK |
2748 | err = -EOPNOTSUPP; |
2749 | goto out_err; | |
2750 | } | |
7a462745 AK |
2751 | /* |
2752 | * IF the file is unlinked, we cannot reopen | |
2753 | * the file later. So don't reclaim fd | |
2754 | */ | |
bccacf6c | 2755 | err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); |
7a462745 AK |
2756 | if (err < 0) { |
2757 | goto out_err; | |
2758 | } | |
bccacf6c | 2759 | err = v9fs_co_remove(pdu, &fidp->path); |
ae1ef571 VJ |
2760 | if (!err) { |
2761 | err = offset; | |
2762 | } | |
7a462745 | 2763 | out_err: |
ae1ef571 | 2764 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
84dfb926 | 2765 | clunk_fid(pdu->s, fidp->fid); |
bccacf6c | 2766 | put_fid(pdu, fidp); |
84dfb926 | 2767 | out_nofid: |
dc295f83 | 2768 | pdu_complete(pdu, err); |
9f107513 AL |
2769 | } |
2770 | ||
8440e22e | 2771 | static void coroutine_fn v9fs_unlinkat(void *opaque) |
7834cf77 AK |
2772 | { |
2773 | int err = 0; | |
2774 | V9fsString name; | |
67e87345 | 2775 | int32_t dfid, flags, rflags = 0; |
7834cf77 | 2776 | size_t offset = 7; |
2289be19 | 2777 | V9fsPath path; |
7834cf77 AK |
2778 | V9fsFidState *dfidp; |
2779 | V9fsPDU *pdu = opaque; | |
7834cf77 | 2780 | |
ddca7f86 MK |
2781 | v9fs_string_init(&name); |
2782 | err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); | |
2783 | if (err < 0) { | |
2784 | goto out_nofid; | |
2785 | } | |
fff39a7a GK |
2786 | |
2787 | if (name_is_illegal(name.data)) { | |
2788 | err = -ENOENT; | |
2789 | goto out_nofid; | |
2790 | } | |
2791 | ||
805b5d98 GK |
2792 | if (!strcmp(".", name.data)) { |
2793 | err = -EINVAL; | |
2794 | goto out_nofid; | |
2795 | } | |
2796 | ||
2797 | if (!strcmp("..", name.data)) { | |
2798 | err = -ENOTEMPTY; | |
2799 | goto out_nofid; | |
2800 | } | |
2801 | ||
67e87345 KF |
2802 | if (flags & ~P9_DOTL_AT_REMOVEDIR) { |
2803 | err = -EINVAL; | |
2804 | goto out_nofid; | |
2805 | } | |
2806 | ||
2807 | if (flags & P9_DOTL_AT_REMOVEDIR) { | |
2808 | rflags |= AT_REMOVEDIR; | |
2809 | } | |
2810 | ||
bccacf6c | 2811 | dfidp = get_fid(pdu, dfid); |
7834cf77 AK |
2812 | if (dfidp == NULL) { |
2813 | err = -EINVAL; | |
2814 | goto out_nofid; | |
2815 | } | |
7834cf77 AK |
2816 | /* |
2817 | * IF the file is unlinked, we cannot reopen | |
2818 | * the file later. So don't reclaim fd | |
2819 | */ | |
2289be19 | 2820 | v9fs_path_init(&path); |
bccacf6c | 2821 | err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); |
2289be19 AK |
2822 | if (err < 0) { |
2823 | goto out_err; | |
2824 | } | |
bccacf6c | 2825 | err = v9fs_mark_fids_unreclaim(pdu, &path); |
7834cf77 AK |
2826 | if (err < 0) { |
2827 | goto out_err; | |
2828 | } | |
67e87345 | 2829 | err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, rflags); |
7834cf77 AK |
2830 | if (!err) { |
2831 | err = offset; | |
2832 | } | |
2833 | out_err: | |
bccacf6c | 2834 | put_fid(pdu, dfidp); |
2289be19 | 2835 | v9fs_path_free(&path); |
7834cf77 | 2836 | out_nofid: |
dc295f83 | 2837 | pdu_complete(pdu, err); |
7834cf77 AK |
2838 | v9fs_string_free(&name); |
2839 | } | |
2840 | ||
2289be19 AK |
2841 | |
2842 | /* Only works with path name based fid */ | |
8440e22e GK |
2843 | static int coroutine_fn v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, |
2844 | int32_t newdirfid, | |
2845 | V9fsString *name) | |
8cf89e00 | 2846 | { |
c7b4b0b3 | 2847 | int err = 0; |
2289be19 AK |
2848 | V9fsPath new_path; |
2849 | V9fsFidState *tfidp; | |
bccacf6c | 2850 | V9fsState *s = pdu->s; |
84dfb926 | 2851 | V9fsFidState *dirfidp = NULL; |
8cf89e00 | 2852 | |
2289be19 | 2853 | v9fs_path_init(&new_path); |
930b1e17 | 2854 | if (newdirfid != -1) { |
bccacf6c | 2855 | dirfidp = get_fid(pdu, newdirfid); |
c7b4b0b3 MK |
2856 | if (dirfidp == NULL) { |
2857 | err = -ENOENT; | |
84dfb926 | 2858 | goto out_nofid; |
c7b4b0b3 | 2859 | } |
49dd946b GK |
2860 | if (fidp->fid_type != P9_FID_NONE) { |
2861 | err = -EINVAL; | |
2862 | goto out; | |
2863 | } | |
4fa62005 GK |
2864 | err = v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); |
2865 | if (err < 0) { | |
2866 | goto out; | |
2867 | } | |
c7b4b0b3 | 2868 | } else { |
4d8bc733 JD |
2869 | char *dir_name = g_path_get_dirname(fidp->path.data); |
2870 | V9fsPath dir_path; | |
2871 | ||
2872 | v9fs_path_init(&dir_path); | |
2873 | v9fs_path_sprintf(&dir_path, "%s", dir_name); | |
2874 | g_free(dir_name); | |
2875 | ||
2876 | err = v9fs_co_name_to_path(pdu, &dir_path, name->data, &new_path); | |
2877 | v9fs_path_free(&dir_path); | |
4fa62005 GK |
2878 | if (err < 0) { |
2879 | goto out; | |
2880 | } | |
c7b4b0b3 | 2881 | } |
bccacf6c | 2882 | err = v9fs_co_rename(pdu, &fidp->path, &new_path); |
2289be19 AK |
2883 | if (err < 0) { |
2884 | goto out; | |
2885 | } | |
2886 | /* | |
2887 | * Fixup fid's pointing to the old name to | |
2888 | * start pointing to the new name | |
2889 | */ | |
2890 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
2891 | if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { | |
2892 | /* replace the name */ | |
2893 | v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); | |
8cf89e00 AL |
2894 | } |
2895 | } | |
c7b4b0b3 | 2896 | out: |
84dfb926 | 2897 | if (dirfidp) { |
bccacf6c | 2898 | put_fid(pdu, dirfidp); |
84dfb926 | 2899 | } |
2289be19 | 2900 | v9fs_path_free(&new_path); |
84dfb926 | 2901 | out_nofid: |
c7b4b0b3 MK |
2902 | return err; |
2903 | } | |
2904 | ||
532decb7 | 2905 | /* Only works with path name based fid */ |
8440e22e | 2906 | static void coroutine_fn v9fs_rename(void *opaque) |
c7b4b0b3 MK |
2907 | { |
2908 | int32_t fid; | |
c7b4b0b3 | 2909 | ssize_t err = 0; |
930b1e17 AK |
2910 | size_t offset = 7; |
2911 | V9fsString name; | |
2912 | int32_t newdirfid; | |
2913 | V9fsFidState *fidp; | |
2914 | V9fsPDU *pdu = opaque; | |
2915 | V9fsState *s = pdu->s; | |
c7b4b0b3 | 2916 | |
ddca7f86 MK |
2917 | v9fs_string_init(&name); |
2918 | err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); | |
2919 | if (err < 0) { | |
2920 | goto out_nofid; | |
2921 | } | |
fff39a7a GK |
2922 | |
2923 | if (name_is_illegal(name.data)) { | |
2924 | err = -ENOENT; | |
2925 | goto out_nofid; | |
2926 | } | |
2927 | ||
805b5d98 GK |
2928 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2929 | err = -EISDIR; | |
2930 | goto out_nofid; | |
2931 | } | |
2932 | ||
bccacf6c | 2933 | fidp = get_fid(pdu, fid); |
930b1e17 | 2934 | if (fidp == NULL) { |
c7b4b0b3 | 2935 | err = -ENOENT; |
84dfb926 | 2936 | goto out_nofid; |
c7b4b0b3 | 2937 | } |
49dd946b GK |
2938 | if (fidp->fid_type != P9_FID_NONE) { |
2939 | err = -EINVAL; | |
2940 | goto out; | |
2941 | } | |
532decb7 | 2942 | /* if fs driver is not path based, return EOPNOTSUPP */ |
c98f1d4a | 2943 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { |
532decb7 AK |
2944 | err = -EOPNOTSUPP; |
2945 | goto out; | |
2946 | } | |
2947 | v9fs_path_write_lock(s); | |
bccacf6c | 2948 | err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); |
532decb7 | 2949 | v9fs_path_unlock(s); |
930b1e17 AK |
2950 | if (!err) { |
2951 | err = offset; | |
2952 | } | |
532decb7 | 2953 | out: |
bccacf6c | 2954 | put_fid(pdu, fidp); |
84dfb926 | 2955 | out_nofid: |
dc295f83 | 2956 | pdu_complete(pdu, err); |
930b1e17 | 2957 | v9fs_string_free(&name); |
c7b4b0b3 MK |
2958 | } |
2959 | ||
4fa62005 GK |
2960 | static int coroutine_fn v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, |
2961 | V9fsString *old_name, | |
2962 | V9fsPath *newdir, | |
2963 | V9fsString *new_name) | |
2289be19 AK |
2964 | { |
2965 | V9fsFidState *tfidp; | |
2966 | V9fsPath oldpath, newpath; | |
bccacf6c | 2967 | V9fsState *s = pdu->s; |
4fa62005 | 2968 | int err; |
2289be19 AK |
2969 | |
2970 | v9fs_path_init(&oldpath); | |
2971 | v9fs_path_init(&newpath); | |
4fa62005 GK |
2972 | err = v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); |
2973 | if (err < 0) { | |
2974 | goto out; | |
2975 | } | |
2976 | err = v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); | |
2977 | if (err < 0) { | |
2978 | goto out; | |
2979 | } | |
2289be19 AK |
2980 | |
2981 | /* | |
2982 | * Fixup fid's pointing to the old name to | |
2983 | * start pointing to the new name | |
2984 | */ | |
2985 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
2986 | if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { | |
2987 | /* replace the name */ | |
2988 | v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); | |
2989 | } | |
2990 | } | |
4fa62005 | 2991 | out: |
2289be19 AK |
2992 | v9fs_path_free(&oldpath); |
2993 | v9fs_path_free(&newpath); | |
4fa62005 | 2994 | return err; |
2289be19 AK |
2995 | } |
2996 | ||
8440e22e GK |
2997 | static int coroutine_fn v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, |
2998 | V9fsString *old_name, | |
2999 | int32_t newdirfid, | |
3000 | V9fsString *new_name) | |
89bf6593 AK |
3001 | { |
3002 | int err = 0; | |
bccacf6c | 3003 | V9fsState *s = pdu->s; |
89bf6593 AK |
3004 | V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; |
3005 | ||
bccacf6c | 3006 | olddirfidp = get_fid(pdu, olddirfid); |
89bf6593 AK |
3007 | if (olddirfidp == NULL) { |
3008 | err = -ENOENT; | |
3009 | goto out; | |
3010 | } | |
89bf6593 | 3011 | if (newdirfid != -1) { |
bccacf6c | 3012 | newdirfidp = get_fid(pdu, newdirfid); |
89bf6593 AK |
3013 | if (newdirfidp == NULL) { |
3014 | err = -ENOENT; | |
3015 | goto out; | |
3016 | } | |
89bf6593 | 3017 | } else { |
bccacf6c | 3018 | newdirfidp = get_fid(pdu, olddirfid); |
89bf6593 AK |
3019 | } |
3020 | ||
bccacf6c | 3021 | err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, |
2289be19 AK |
3022 | &newdirfidp->path, new_name); |
3023 | if (err < 0) { | |
3024 | goto out; | |
89bf6593 | 3025 | } |
c98f1d4a | 3026 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { |
532decb7 | 3027 | /* Only for path based fid we need to do the below fixup */ |
4fa62005 GK |
3028 | err = v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, |
3029 | &newdirfidp->path, new_name); | |
532decb7 | 3030 | } |
89bf6593 AK |
3031 | out: |
3032 | if (olddirfidp) { | |
bccacf6c | 3033 | put_fid(pdu, olddirfidp); |
89bf6593 AK |
3034 | } |
3035 | if (newdirfidp) { | |
bccacf6c | 3036 | put_fid(pdu, newdirfidp); |
89bf6593 | 3037 | } |
89bf6593 AK |
3038 | return err; |
3039 | } | |
3040 | ||
8440e22e | 3041 | static void coroutine_fn v9fs_renameat(void *opaque) |
89bf6593 AK |
3042 | { |
3043 | ssize_t err = 0; | |
3044 | size_t offset = 7; | |
3045 | V9fsPDU *pdu = opaque; | |
3046 | V9fsState *s = pdu->s; | |
3047 | int32_t olddirfid, newdirfid; | |
3048 | V9fsString old_name, new_name; | |
3049 | ||
ddca7f86 MK |
3050 | v9fs_string_init(&old_name); |
3051 | v9fs_string_init(&new_name); | |
3052 | err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, | |
3053 | &old_name, &newdirfid, &new_name); | |
3054 | if (err < 0) { | |
3055 | goto out_err; | |
3056 | } | |
89bf6593 | 3057 | |
fff39a7a GK |
3058 | if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { |
3059 | err = -ENOENT; | |
3060 | goto out_err; | |
3061 | } | |
3062 | ||
805b5d98 GK |
3063 | if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || |
3064 | !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { | |
3065 | err = -EISDIR; | |
3066 | goto out_err; | |
3067 | } | |
3068 | ||
532decb7 | 3069 | v9fs_path_write_lock(s); |
bccacf6c AK |
3070 | err = v9fs_complete_renameat(pdu, olddirfid, |
3071 | &old_name, newdirfid, &new_name); | |
532decb7 | 3072 | v9fs_path_unlock(s); |
89bf6593 AK |
3073 | if (!err) { |
3074 | err = offset; | |
3075 | } | |
ddca7f86 MK |
3076 | |
3077 | out_err: | |
dc295f83 | 3078 | pdu_complete(pdu, err); |
89bf6593 AK |
3079 | v9fs_string_free(&old_name); |
3080 | v9fs_string_free(&new_name); | |
3081 | } | |
3082 | ||
8440e22e | 3083 | static void coroutine_fn v9fs_wstat(void *opaque) |
8cf89e00 | 3084 | { |
b81d685e AK |
3085 | int32_t fid; |
3086 | int err = 0; | |
3087 | int16_t unused; | |
3088 | V9fsStat v9stat; | |
3089 | size_t offset = 7; | |
3090 | struct stat stbuf; | |
3091 | V9fsFidState *fidp; | |
3092 | V9fsPDU *pdu = opaque; | |
1d203986 | 3093 | V9fsState *s = pdu->s; |
8cf89e00 | 3094 | |
ddca7f86 MK |
3095 | v9fs_stat_init(&v9stat); |
3096 | err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); | |
3097 | if (err < 0) { | |
3098 | goto out_nofid; | |
3099 | } | |
c572f23a HPB |
3100 | trace_v9fs_wstat(pdu->tag, pdu->id, fid, |
3101 | v9stat.mode, v9stat.atime, v9stat.mtime); | |
84dfb926 | 3102 | |
bccacf6c | 3103 | fidp = get_fid(pdu, fid); |
b81d685e AK |
3104 | if (fidp == NULL) { |
3105 | err = -EINVAL; | |
84dfb926 | 3106 | goto out_nofid; |
8cf89e00 | 3107 | } |
b81d685e AK |
3108 | /* do we need to sync the file? */ |
3109 | if (donttouch_stat(&v9stat)) { | |
bccacf6c | 3110 | err = v9fs_co_fsync(pdu, fidp, 0); |
8cf89e00 AL |
3111 | goto out; |
3112 | } | |
b81d685e AK |
3113 | if (v9stat.mode != -1) { |
3114 | uint32_t v9_mode; | |
bccacf6c | 3115 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
b81d685e AK |
3116 | if (err < 0) { |
3117 | goto out; | |
3118 | } | |
3119 | v9_mode = stat_to_v9mode(&stbuf); | |
3120 | if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
3121 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
3122 | /* Attempting to change the type */ | |
3123 | err = -EIO; | |
3124 | goto out; | |
3125 | } | |
bccacf6c | 3126 | err = v9fs_co_chmod(pdu, &fidp->path, |
b81d685e AK |
3127 | v9mode_to_mode(v9stat.mode, |
3128 | &v9stat.extension)); | |
3129 | if (err < 0) { | |
3130 | goto out; | |
3131 | } | |
3132 | } | |
3133 | if (v9stat.mtime != -1 || v9stat.atime != -1) { | |
8fc39ae4 | 3134 | struct timespec times[2]; |
b81d685e AK |
3135 | if (v9stat.atime != -1) { |
3136 | times[0].tv_sec = v9stat.atime; | |
8fc39ae4 SK |
3137 | times[0].tv_nsec = 0; |
3138 | } else { | |
3139 | times[0].tv_nsec = UTIME_OMIT; | |
3140 | } | |
b81d685e AK |
3141 | if (v9stat.mtime != -1) { |
3142 | times[1].tv_sec = v9stat.mtime; | |
8fc39ae4 SK |
3143 | times[1].tv_nsec = 0; |
3144 | } else { | |
3145 | times[1].tv_nsec = UTIME_OMIT; | |
3146 | } | |
bccacf6c | 3147 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
b81d685e AK |
3148 | if (err < 0) { |
3149 | goto out; | |
8cf89e00 AL |
3150 | } |
3151 | } | |
b81d685e | 3152 | if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { |
bccacf6c | 3153 | err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); |
b81d685e | 3154 | if (err < 0) { |
8cf89e00 | 3155 | goto out; |
b81d685e | 3156 | } |
8cf89e00 | 3157 | } |
b81d685e | 3158 | if (v9stat.name.size != 0) { |
1d203986 | 3159 | v9fs_path_write_lock(s); |
bccacf6c | 3160 | err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); |
1d203986 | 3161 | v9fs_path_unlock(s); |
b81d685e AK |
3162 | if (err < 0) { |
3163 | goto out; | |
3164 | } | |
8cf89e00 | 3165 | } |
b81d685e | 3166 | if (v9stat.length != -1) { |
bccacf6c | 3167 | err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); |
b81d685e AK |
3168 | if (err < 0) { |
3169 | goto out; | |
3170 | } | |
8cf89e00 | 3171 | } |
b81d685e | 3172 | err = offset; |
8cf89e00 | 3173 | out: |
bccacf6c | 3174 | put_fid(pdu, fidp); |
84dfb926 | 3175 | out_nofid: |
b81d685e | 3176 | v9fs_stat_free(&v9stat); |
dc295f83 | 3177 | pdu_complete(pdu, err); |
9f107513 AL |
3178 | } |
3179 | ||
88a4763e AK |
3180 | static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
3181 | { | |
3182 | uint32_t f_type; | |
3183 | uint32_t f_bsize; | |
3184 | uint64_t f_blocks; | |
3185 | uint64_t f_bfree; | |
3186 | uint64_t f_bavail; | |
3187 | uint64_t f_files; | |
3188 | uint64_t f_ffree; | |
3189 | uint64_t fsid_val; | |
3190 | uint32_t f_namelen; | |
3191 | size_t offset = 7; | |
5e94c103 MK |
3192 | int32_t bsize_factor; |
3193 | ||
5e94c103 MK |
3194 | /* |
3195 | * compute bsize factor based on host file system block size | |
3196 | * and client msize | |
3197 | */ | |
88a4763e | 3198 | bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
5e94c103 MK |
3199 | if (!bsize_factor) { |
3200 | bsize_factor = 1; | |
3201 | } | |
88a4763e AK |
3202 | f_type = stbuf->f_type; |
3203 | f_bsize = stbuf->f_bsize; | |
3204 | f_bsize *= bsize_factor; | |
5e94c103 MK |
3205 | /* |
3206 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
3207 | * adjust(divide) the number of blocks, free blocks and available | |
3208 | * blocks by bsize factor | |
3209 | */ | |
88a4763e AK |
3210 | f_blocks = stbuf->f_blocks/bsize_factor; |
3211 | f_bfree = stbuf->f_bfree/bsize_factor; | |
3212 | f_bavail = stbuf->f_bavail/bsize_factor; | |
3213 | f_files = stbuf->f_files; | |
3214 | f_ffree = stbuf->f_ffree; | |
3215 | fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | | |
3216 | (unsigned long long)stbuf->f_fsid.__val[1] << 32; | |
3217 | f_namelen = stbuf->f_namelen; | |
be940c87 | 3218 | |
88a4763e AK |
3219 | return pdu_marshal(pdu, offset, "ddqqqqqqd", |
3220 | f_type, f_bsize, f_blocks, f_bfree, | |
3221 | f_bavail, f_files, f_ffree, | |
3222 | fsid_val, f_namelen); | |
be940c87 MK |
3223 | } |
3224 | ||
8440e22e | 3225 | static void coroutine_fn v9fs_statfs(void *opaque) |
be940c87 | 3226 | { |
88a4763e AK |
3227 | int32_t fid; |
3228 | ssize_t retval = 0; | |
3229 | size_t offset = 7; | |
3230 | V9fsFidState *fidp; | |
3231 | struct statfs stbuf; | |
ff06030f VJ |
3232 | V9fsPDU *pdu = opaque; |
3233 | V9fsState *s = pdu->s; | |
be940c87 | 3234 | |
ddca7f86 MK |
3235 | retval = pdu_unmarshal(pdu, offset, "d", &fid); |
3236 | if (retval < 0) { | |
3237 | goto out_nofid; | |
3238 | } | |
bccacf6c | 3239 | fidp = get_fid(pdu, fid); |
88a4763e AK |
3240 | if (fidp == NULL) { |
3241 | retval = -ENOENT; | |
84dfb926 | 3242 | goto out_nofid; |
be940c87 | 3243 | } |
bccacf6c | 3244 | retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); |
88a4763e AK |
3245 | if (retval < 0) { |
3246 | goto out; | |
3247 | } | |
ddca7f86 MK |
3248 | retval = v9fs_fill_statfs(s, pdu, &stbuf); |
3249 | if (retval < 0) { | |
3250 | goto out; | |
3251 | } | |
3252 | retval += offset; | |
be940c87 | 3253 | out: |
bccacf6c | 3254 | put_fid(pdu, fidp); |
84dfb926 | 3255 | out_nofid: |
dc295f83 | 3256 | pdu_complete(pdu, retval); |
be940c87 MK |
3257 | } |
3258 | ||
8440e22e | 3259 | static void coroutine_fn v9fs_mknod(void *opaque) |
5268cecc | 3260 | { |
1b733fed AK |
3261 | |
3262 | int mode; | |
3263 | gid_t gid; | |
5268cecc | 3264 | int32_t fid; |
1b733fed | 3265 | V9fsQID qid; |
5268cecc | 3266 | int err = 0; |
5268cecc | 3267 | int major, minor; |
1b733fed AK |
3268 | size_t offset = 7; |
3269 | V9fsString name; | |
3270 | struct stat stbuf; | |
1b733fed AK |
3271 | V9fsFidState *fidp; |
3272 | V9fsPDU *pdu = opaque; | |
5268cecc | 3273 | |
ddca7f86 MK |
3274 | v9fs_string_init(&name); |
3275 | err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, | |
3276 | &major, &minor, &gid); | |
3277 | if (err < 0) { | |
3278 | goto out_nofid; | |
3279 | } | |
c572f23a | 3280 | trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); |
5268cecc | 3281 | |
fff39a7a GK |
3282 | if (name_is_illegal(name.data)) { |
3283 | err = -ENOENT; | |
3284 | goto out_nofid; | |
3285 | } | |
3286 | ||
805b5d98 GK |
3287 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
3288 | err = -EEXIST; | |
3289 | goto out_nofid; | |
3290 | } | |
3291 | ||
bccacf6c | 3292 | fidp = get_fid(pdu, fid); |
5268cecc MK |
3293 | if (fidp == NULL) { |
3294 | err = -ENOENT; | |
84dfb926 | 3295 | goto out_nofid; |
5268cecc | 3296 | } |
bccacf6c | 3297 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, |
02cb7f3a | 3298 | makedev(major, minor), mode, &stbuf); |
1b733fed AK |
3299 | if (err < 0) { |
3300 | goto out; | |
3301 | } | |
3b5ee9e8 AM |
3302 | err = stat_to_qid(pdu, &stbuf, &qid); |
3303 | if (err < 0) { | |
3304 | goto out; | |
3305 | } | |
ddca7f86 MK |
3306 | err = pdu_marshal(pdu, offset, "Q", &qid); |
3307 | if (err < 0) { | |
3308 | goto out; | |
3309 | } | |
3310 | err += offset; | |
7999f7e1 AK |
3311 | trace_v9fs_mknod_return(pdu->tag, pdu->id, |
3312 | qid.type, qid.version, qid.path); | |
5268cecc | 3313 | out: |
bccacf6c | 3314 | put_fid(pdu, fidp); |
84dfb926 | 3315 | out_nofid: |
dc295f83 | 3316 | pdu_complete(pdu, err); |
1b733fed | 3317 | v9fs_string_free(&name); |
5268cecc MK |
3318 | } |
3319 | ||
82cc3ee8 MK |
3320 | /* |
3321 | * Implement posix byte range locking code | |
3322 | * Server side handling of locking code is very simple, because 9p server in | |
3323 | * QEMU can handle only one client. And most of the lock handling | |
3324 | * (like conflict, merging) etc is done by the VFS layer itself, so no need to | |
3325 | * do any thing in * qemu 9p server side lock code path. | |
3326 | * So when a TLOCK request comes, always return success | |
3327 | */ | |
8440e22e | 3328 | static void coroutine_fn v9fs_lock(void *opaque) |
82cc3ee8 | 3329 | { |
ddca7f86 | 3330 | V9fsFlock flock; |
0c27bf2a AK |
3331 | size_t offset = 7; |
3332 | struct stat stbuf; | |
3333 | V9fsFidState *fidp; | |
3334 | int32_t fid, err = 0; | |
ff06030f | 3335 | V9fsPDU *pdu = opaque; |
82cc3ee8 | 3336 | |
ddca7f86 MK |
3337 | v9fs_string_init(&flock.client_id); |
3338 | err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, | |
3339 | &flock.flags, &flock.start, &flock.length, | |
3340 | &flock.proc_id, &flock.client_id); | |
3341 | if (err < 0) { | |
3342 | goto out_nofid; | |
3343 | } | |
c572f23a | 3344 | trace_v9fs_lock(pdu->tag, pdu->id, fid, |
ddca7f86 | 3345 | flock.type, flock.start, flock.length); |
c572f23a | 3346 | |
82cc3ee8 MK |
3347 | |
3348 | /* We support only block flag now (that too ignored currently) */ | |
ddca7f86 | 3349 | if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { |
82cc3ee8 | 3350 | err = -EINVAL; |
84dfb926 | 3351 | goto out_nofid; |
82cc3ee8 | 3352 | } |
bccacf6c | 3353 | fidp = get_fid(pdu, fid); |
0c27bf2a | 3354 | if (fidp == NULL) { |
82cc3ee8 | 3355 | err = -ENOENT; |
84dfb926 | 3356 | goto out_nofid; |
82cc3ee8 | 3357 | } |
cc720ddb | 3358 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
82cc3ee8 | 3359 | if (err < 0) { |
82cc3ee8 MK |
3360 | goto out; |
3361 | } | |
4bae2b39 PB |
3362 | err = pdu_marshal(pdu, offset, "b", P9_LOCK_SUCCESS); |
3363 | if (err < 0) { | |
3364 | goto out; | |
3365 | } | |
3366 | err += offset; | |
3367 | trace_v9fs_lock_return(pdu->tag, pdu->id, P9_LOCK_SUCCESS); | |
82cc3ee8 | 3368 | out: |
bccacf6c | 3369 | put_fid(pdu, fidp); |
84dfb926 | 3370 | out_nofid: |
dc295f83 | 3371 | pdu_complete(pdu, err); |
ddca7f86 | 3372 | v9fs_string_free(&flock.client_id); |
82cc3ee8 MK |
3373 | } |
3374 | ||
8f354003 MK |
3375 | /* |
3376 | * When a TGETLOCK request comes, always return success because all lock | |
3377 | * handling is done by client's VFS layer. | |
3378 | */ | |
8440e22e | 3379 | static void coroutine_fn v9fs_getlock(void *opaque) |
8f354003 | 3380 | { |
e4e414a4 AK |
3381 | size_t offset = 7; |
3382 | struct stat stbuf; | |
3383 | V9fsFidState *fidp; | |
ddca7f86 | 3384 | V9fsGetlock glock; |
e4e414a4 | 3385 | int32_t fid, err = 0; |
ff06030f | 3386 | V9fsPDU *pdu = opaque; |
8f354003 | 3387 | |
ddca7f86 MK |
3388 | v9fs_string_init(&glock.client_id); |
3389 | err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, | |
3390 | &glock.start, &glock.length, &glock.proc_id, | |
3391 | &glock.client_id); | |
3392 | if (err < 0) { | |
3393 | goto out_nofid; | |
3394 | } | |
c572f23a | 3395 | trace_v9fs_getlock(pdu->tag, pdu->id, fid, |
ddca7f86 | 3396 | glock.type, glock.start, glock.length); |
c572f23a | 3397 | |
bccacf6c | 3398 | fidp = get_fid(pdu, fid); |
e4e414a4 | 3399 | if (fidp == NULL) { |
8f354003 | 3400 | err = -ENOENT; |
84dfb926 | 3401 | goto out_nofid; |
8f354003 | 3402 | } |
cc720ddb | 3403 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
8f354003 | 3404 | if (err < 0) { |
8f354003 MK |
3405 | goto out; |
3406 | } | |
ddca7f86 MK |
3407 | glock.type = P9_LOCK_TYPE_UNLCK; |
3408 | err = pdu_marshal(pdu, offset, "bqqds", glock.type, | |
3409 | glock.start, glock.length, glock.proc_id, | |
3410 | &glock.client_id); | |
3411 | if (err < 0) { | |
3412 | goto out; | |
3413 | } | |
3414 | err += offset; | |
3415 | trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, | |
3416 | glock.length, glock.proc_id); | |
8f354003 | 3417 | out: |
bccacf6c | 3418 | put_fid(pdu, fidp); |
84dfb926 | 3419 | out_nofid: |
dc295f83 | 3420 | pdu_complete(pdu, err); |
ddca7f86 | 3421 | v9fs_string_free(&glock.client_id); |
8f354003 MK |
3422 | } |
3423 | ||
8440e22e | 3424 | static void coroutine_fn v9fs_mkdir(void *opaque) |
b67592ea | 3425 | { |
ff06030f | 3426 | V9fsPDU *pdu = opaque; |
e84861f7 | 3427 | size_t offset = 7; |
b67592ea | 3428 | int32_t fid; |
e84861f7 | 3429 | struct stat stbuf; |
e84861f7 | 3430 | V9fsQID qid; |
02cb7f3a | 3431 | V9fsString name; |
b67592ea MK |
3432 | V9fsFidState *fidp; |
3433 | gid_t gid; | |
3434 | int mode; | |
e84861f7 | 3435 | int err = 0; |
b67592ea | 3436 | |
ddca7f86 MK |
3437 | v9fs_string_init(&name); |
3438 | err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); | |
3439 | if (err < 0) { | |
3440 | goto out_nofid; | |
3441 | } | |
c572f23a HPB |
3442 | trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); |
3443 | ||
fff39a7a GK |
3444 | if (name_is_illegal(name.data)) { |
3445 | err = -ENOENT; | |
3446 | goto out_nofid; | |
3447 | } | |
3448 | ||
805b5d98 GK |
3449 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
3450 | err = -EEXIST; | |
3451 | goto out_nofid; | |
3452 | } | |
3453 | ||
bccacf6c | 3454 | fidp = get_fid(pdu, fid); |
b67592ea MK |
3455 | if (fidp == NULL) { |
3456 | err = -ENOENT; | |
84dfb926 | 3457 | goto out_nofid; |
b67592ea | 3458 | } |
bccacf6c | 3459 | err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); |
e84861f7 VJ |
3460 | if (err < 0) { |
3461 | goto out; | |
3462 | } | |
3b5ee9e8 AM |
3463 | err = stat_to_qid(pdu, &stbuf, &qid); |
3464 | if (err < 0) { | |
3465 | goto out; | |
3466 | } | |
ddca7f86 MK |
3467 | err = pdu_marshal(pdu, offset, "Q", &qid); |
3468 | if (err < 0) { | |
3469 | goto out; | |
3470 | } | |
3471 | err += offset; | |
7999f7e1 AK |
3472 | trace_v9fs_mkdir_return(pdu->tag, pdu->id, |
3473 | qid.type, qid.version, qid.path, err); | |
b67592ea | 3474 | out: |
bccacf6c | 3475 | put_fid(pdu, fidp); |
84dfb926 | 3476 | out_nofid: |
dc295f83 | 3477 | pdu_complete(pdu, err); |
e84861f7 | 3478 | v9fs_string_free(&name); |
b67592ea MK |
3479 | } |
3480 | ||
8440e22e | 3481 | static void coroutine_fn v9fs_xattrwalk(void *opaque) |
fa32ef88 | 3482 | { |
670185a6 AK |
3483 | int64_t size; |
3484 | V9fsString name; | |
fa32ef88 | 3485 | ssize_t err = 0; |
670185a6 | 3486 | size_t offset = 7; |
fa32ef88 | 3487 | int32_t fid, newfid; |
670185a6 | 3488 | V9fsFidState *file_fidp; |
84dfb926 | 3489 | V9fsFidState *xattr_fidp = NULL; |
670185a6 AK |
3490 | V9fsPDU *pdu = opaque; |
3491 | V9fsState *s = pdu->s; | |
fa32ef88 | 3492 | |
ddca7f86 MK |
3493 | v9fs_string_init(&name); |
3494 | err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); | |
3495 | if (err < 0) { | |
3496 | goto out_nofid; | |
3497 | } | |
c572f23a HPB |
3498 | trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); |
3499 | ||
bccacf6c | 3500 | file_fidp = get_fid(pdu, fid); |
670185a6 | 3501 | if (file_fidp == NULL) { |
fa32ef88 | 3502 | err = -ENOENT; |
84dfb926 | 3503 | goto out_nofid; |
fa32ef88 | 3504 | } |
670185a6 AK |
3505 | xattr_fidp = alloc_fid(s, newfid); |
3506 | if (xattr_fidp == NULL) { | |
fa32ef88 AK |
3507 | err = -EINVAL; |
3508 | goto out; | |
3509 | } | |
2289be19 | 3510 | v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); |
ba42ebb8 | 3511 | if (!v9fs_string_size(&name)) { |
fa32ef88 AK |
3512 | /* |
3513 | * listxattr request. Get the size first | |
3514 | */ | |
bccacf6c | 3515 | size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); |
670185a6 AK |
3516 | if (size < 0) { |
3517 | err = size; | |
84dfb926 | 3518 | clunk_fid(s, xattr_fidp->fid); |
670185a6 | 3519 | goto out; |
fa32ef88 | 3520 | } |
670185a6 AK |
3521 | /* |
3522 | * Read the xattr value | |
3523 | */ | |
3524 | xattr_fidp->fs.xattr.len = size; | |
3525 | xattr_fidp->fid_type = P9_FID_XATTR; | |
dd28fbbc | 3526 | xattr_fidp->fs.xattr.xattrwalk_fid = true; |
a647502c | 3527 | xattr_fidp->fs.xattr.value = g_malloc0(size); |
670185a6 | 3528 | if (size) { |
bccacf6c | 3529 | err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3530 | xattr_fidp->fs.xattr.value, |
3531 | xattr_fidp->fs.xattr.len); | |
3532 | if (err < 0) { | |
84dfb926 | 3533 | clunk_fid(s, xattr_fidp->fid); |
670185a6 AK |
3534 | goto out; |
3535 | } | |
3536 | } | |
ddca7f86 MK |
3537 | err = pdu_marshal(pdu, offset, "q", size); |
3538 | if (err < 0) { | |
3539 | goto out; | |
3540 | } | |
3541 | err += offset; | |
fa32ef88 AK |
3542 | } else { |
3543 | /* | |
3544 | * specific xattr fid. We check for xattr | |
3545 | * presence also collect the xattr size | |
3546 | */ | |
bccacf6c | 3547 | size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3548 | &name, NULL, 0); |
3549 | if (size < 0) { | |
3550 | err = size; | |
84dfb926 | 3551 | clunk_fid(s, xattr_fidp->fid); |
670185a6 | 3552 | goto out; |
fa32ef88 | 3553 | } |
670185a6 AK |
3554 | /* |
3555 | * Read the xattr value | |
3556 | */ | |
3557 | xattr_fidp->fs.xattr.len = size; | |
3558 | xattr_fidp->fid_type = P9_FID_XATTR; | |
dd28fbbc | 3559 | xattr_fidp->fs.xattr.xattrwalk_fid = true; |
a647502c | 3560 | xattr_fidp->fs.xattr.value = g_malloc0(size); |
670185a6 | 3561 | if (size) { |
bccacf6c | 3562 | err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3563 | &name, xattr_fidp->fs.xattr.value, |
3564 | xattr_fidp->fs.xattr.len); | |
3565 | if (err < 0) { | |
84dfb926 | 3566 | clunk_fid(s, xattr_fidp->fid); |
670185a6 AK |
3567 | goto out; |
3568 | } | |
3569 | } | |
ddca7f86 MK |
3570 | err = pdu_marshal(pdu, offset, "q", size); |
3571 | if (err < 0) { | |
3572 | goto out; | |
3573 | } | |
3574 | err += offset; | |
fa32ef88 | 3575 | } |
7999f7e1 | 3576 | trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); |
fa32ef88 | 3577 | out: |
bccacf6c | 3578 | put_fid(pdu, file_fidp); |
84dfb926 | 3579 | if (xattr_fidp) { |
bccacf6c | 3580 | put_fid(pdu, xattr_fidp); |
84dfb926 AK |
3581 | } |
3582 | out_nofid: | |
dc295f83 | 3583 | pdu_complete(pdu, err); |
670185a6 | 3584 | v9fs_string_free(&name); |
fa32ef88 AK |
3585 | } |
3586 | ||
8440e22e | 3587 | static void coroutine_fn v9fs_xattrcreate(void *opaque) |
10b468bd | 3588 | { |
aca6897f | 3589 | int flags, rflags = 0; |
10b468bd | 3590 | int32_t fid; |
3b79ef2c | 3591 | uint64_t size; |
10b468bd | 3592 | ssize_t err = 0; |
f10ff58d AK |
3593 | V9fsString name; |
3594 | size_t offset = 7; | |
3595 | V9fsFidState *file_fidp; | |
3596 | V9fsFidState *xattr_fidp; | |
3597 | V9fsPDU *pdu = opaque; | |
10b468bd | 3598 | |
ddca7f86 MK |
3599 | v9fs_string_init(&name); |
3600 | err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); | |
3601 | if (err < 0) { | |
3602 | goto out_nofid; | |
3603 | } | |
c572f23a | 3604 | trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); |
10b468bd | 3605 | |
aca6897f KF |
3606 | if (flags & ~(P9_XATTR_CREATE | P9_XATTR_REPLACE)) { |
3607 | err = -EINVAL; | |
3608 | goto out_nofid; | |
3609 | } | |
3610 | ||
3611 | if (flags & P9_XATTR_CREATE) { | |
3612 | rflags |= XATTR_CREATE; | |
3613 | } | |
3614 | ||
3615 | if (flags & P9_XATTR_REPLACE) { | |
3616 | rflags |= XATTR_REPLACE; | |
3617 | } | |
3618 | ||
3b79ef2c GK |
3619 | if (size > XATTR_SIZE_MAX) { |
3620 | err = -E2BIG; | |
3621 | goto out_nofid; | |
3622 | } | |
3623 | ||
bccacf6c | 3624 | file_fidp = get_fid(pdu, fid); |
f10ff58d | 3625 | if (file_fidp == NULL) { |
10b468bd | 3626 | err = -EINVAL; |
84dfb926 | 3627 | goto out_nofid; |
10b468bd | 3628 | } |
dd654e03 GK |
3629 | if (file_fidp->fid_type != P9_FID_NONE) { |
3630 | err = -EINVAL; | |
3631 | goto out_put_fid; | |
3632 | } | |
3633 | ||
10b468bd | 3634 | /* Make the file fid point to xattr */ |
f10ff58d AK |
3635 | xattr_fidp = file_fidp; |
3636 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3637 | xattr_fidp->fs.xattr.copied_len = 0; | |
dd28fbbc | 3638 | xattr_fidp->fs.xattr.xattrwalk_fid = false; |
f10ff58d | 3639 | xattr_fidp->fs.xattr.len = size; |
aca6897f | 3640 | xattr_fidp->fs.xattr.flags = rflags; |
f10ff58d AK |
3641 | v9fs_string_init(&xattr_fidp->fs.xattr.name); |
3642 | v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); | |
eb687602 | 3643 | xattr_fidp->fs.xattr.value = g_malloc0(size); |
f10ff58d | 3644 | err = offset; |
dd654e03 | 3645 | out_put_fid: |
bccacf6c | 3646 | put_fid(pdu, file_fidp); |
84dfb926 | 3647 | out_nofid: |
dc295f83 | 3648 | pdu_complete(pdu, err); |
f10ff58d | 3649 | v9fs_string_free(&name); |
10b468bd | 3650 | } |
fa32ef88 | 3651 | |
8440e22e | 3652 | static void coroutine_fn v9fs_readlink(void *opaque) |
df0973a4 | 3653 | { |
ff06030f | 3654 | V9fsPDU *pdu = opaque; |
7a5ca31e VJ |
3655 | size_t offset = 7; |
3656 | V9fsString target; | |
df0973a4 | 3657 | int32_t fid; |
df0973a4 MK |
3658 | int err = 0; |
3659 | V9fsFidState *fidp; | |
3660 | ||
ddca7f86 MK |
3661 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
3662 | if (err < 0) { | |
3663 | goto out_nofid; | |
3664 | } | |
c572f23a | 3665 | trace_v9fs_readlink(pdu->tag, pdu->id, fid); |
bccacf6c | 3666 | fidp = get_fid(pdu, fid); |
df0973a4 MK |
3667 | if (fidp == NULL) { |
3668 | err = -ENOENT; | |
84dfb926 | 3669 | goto out_nofid; |
df0973a4 MK |
3670 | } |
3671 | ||
7a5ca31e | 3672 | v9fs_string_init(&target); |
bccacf6c | 3673 | err = v9fs_co_readlink(pdu, &fidp->path, &target); |
7a5ca31e VJ |
3674 | if (err < 0) { |
3675 | goto out; | |
3676 | } | |
ddca7f86 MK |
3677 | err = pdu_marshal(pdu, offset, "s", &target); |
3678 | if (err < 0) { | |
3679 | v9fs_string_free(&target); | |
3680 | goto out; | |
3681 | } | |
3682 | err += offset; | |
7999f7e1 | 3683 | trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); |
7a5ca31e | 3684 | v9fs_string_free(&target); |
df0973a4 | 3685 | out: |
bccacf6c | 3686 | put_fid(pdu, fidp); |
84dfb926 | 3687 | out_nofid: |
dc295f83 | 3688 | pdu_complete(pdu, err); |
df0973a4 MK |
3689 | } |
3690 | ||
ff06030f | 3691 | static CoroutineEntry *pdu_co_handlers[] = { |
c18e2f94 | 3692 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 3693 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 3694 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 3695 | [P9_TSETATTR] = v9fs_setattr, |
fa32ef88 | 3696 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
10b468bd | 3697 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
5268cecc | 3698 | [P9_TMKNOD] = v9fs_mknod, |
c7b4b0b3 | 3699 | [P9_TRENAME] = v9fs_rename, |
82cc3ee8 | 3700 | [P9_TLOCK] = v9fs_lock, |
8f354003 | 3701 | [P9_TGETLOCK] = v9fs_getlock, |
89bf6593 | 3702 | [P9_TRENAMEAT] = v9fs_renameat, |
df0973a4 | 3703 | [P9_TREADLINK] = v9fs_readlink, |
7834cf77 | 3704 | [P9_TUNLINKAT] = v9fs_unlinkat, |
b67592ea | 3705 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 | 3706 | [P9_TVERSION] = v9fs_version, |
771e9d4c | 3707 | [P9_TLOPEN] = v9fs_open, |
9f107513 AL |
3708 | [P9_TATTACH] = v9fs_attach, |
3709 | [P9_TSTAT] = v9fs_stat, | |
3710 | [P9_TWALK] = v9fs_walk, | |
3711 | [P9_TCLUNK] = v9fs_clunk, | |
b41e95d3 | 3712 | [P9_TFSYNC] = v9fs_fsync, |
9f107513 AL |
3713 | [P9_TOPEN] = v9fs_open, |
3714 | [P9_TREAD] = v9fs_read, | |
3715 | #if 0 | |
3716 | [P9_TAUTH] = v9fs_auth, | |
3717 | #endif | |
3718 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 3719 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 3720 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 3721 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 3722 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
3723 | [P9_TWRITE] = v9fs_write, |
3724 | [P9_TWSTAT] = v9fs_wstat, | |
3725 | [P9_TREMOVE] = v9fs_remove, | |
3726 | }; | |
3727 | ||
8440e22e | 3728 | static void coroutine_fn v9fs_op_not_supp(void *opaque) |
5c3234c6 | 3729 | { |
ff06030f | 3730 | V9fsPDU *pdu = opaque; |
dc295f83 | 3731 | pdu_complete(pdu, -EOPNOTSUPP); |
5c3234c6 AK |
3732 | } |
3733 | ||
8440e22e | 3734 | static void coroutine_fn v9fs_fs_ro(void *opaque) |
2c74c2cb MK |
3735 | { |
3736 | V9fsPDU *pdu = opaque; | |
dc295f83 | 3737 | pdu_complete(pdu, -EROFS); |
2c74c2cb MK |
3738 | } |
3739 | ||
3740 | static inline bool is_read_only_op(V9fsPDU *pdu) | |
3741 | { | |
3742 | switch (pdu->id) { | |
3743 | case P9_TREADDIR: | |
3744 | case P9_TSTATFS: | |
3745 | case P9_TGETATTR: | |
3746 | case P9_TXATTRWALK: | |
3747 | case P9_TLOCK: | |
3748 | case P9_TGETLOCK: | |
3749 | case P9_TREADLINK: | |
3750 | case P9_TVERSION: | |
3751 | case P9_TLOPEN: | |
3752 | case P9_TATTACH: | |
3753 | case P9_TSTAT: | |
3754 | case P9_TWALK: | |
3755 | case P9_TCLUNK: | |
3756 | case P9_TFSYNC: | |
3757 | case P9_TOPEN: | |
3758 | case P9_TREAD: | |
3759 | case P9_TAUTH: | |
3760 | case P9_TFLUSH: | |
3761 | return 1; | |
3762 | default: | |
3763 | return 0; | |
3764 | } | |
3765 | } | |
3766 | ||
506f3275 | 3767 | void pdu_submit(V9fsPDU *pdu, P9MsgHeader *hdr) |
9f107513 | 3768 | { |
ff06030f VJ |
3769 | Coroutine *co; |
3770 | CoroutineEntry *handler; | |
ad38ce9e | 3771 | V9fsState *s = pdu->s; |
9f107513 | 3772 | |
506f3275 GK |
3773 | pdu->size = le32_to_cpu(hdr->size_le); |
3774 | pdu->id = hdr->id; | |
3775 | pdu->tag = le16_to_cpu(hdr->tag_le); | |
3776 | ||
ff06030f VJ |
3777 | if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || |
3778 | (pdu_co_handlers[pdu->id] == NULL)) { | |
5c3234c6 | 3779 | handler = v9fs_op_not_supp; |
d1471233 GK |
3780 | } else if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { |
3781 | handler = v9fs_fs_ro; | |
5c3234c6 | 3782 | } else { |
ff06030f | 3783 | handler = pdu_co_handlers[pdu->id]; |
5c3234c6 | 3784 | } |
2c74c2cb | 3785 | |
506f3275 | 3786 | qemu_co_queue_init(&pdu->complete); |
0b8b8753 PB |
3787 | co = qemu_coroutine_create(handler, pdu); |
3788 | qemu_coroutine_enter(co); | |
9f107513 AL |
3789 | } |
3790 | ||
2a0c56aa | 3791 | /* Returns 0 on success, 1 on failure. */ |
066eb006 GK |
3792 | int v9fs_device_realize_common(V9fsState *s, const V9fsTransport *t, |
3793 | Error **errp) | |
2a0c56aa WL |
3794 | { |
3795 | int i, len; | |
3796 | struct stat stat; | |
3797 | FsDriverEntry *fse; | |
3798 | V9fsPath path; | |
3799 | int rc = 1; | |
3800 | ||
066eb006 GK |
3801 | assert(!s->transport); |
3802 | s->transport = t; | |
3803 | ||
2a0c56aa WL |
3804 | /* initialize pdu allocator */ |
3805 | QLIST_INIT(&s->free_list); | |
3806 | QLIST_INIT(&s->active_list); | |
0d78289c | 3807 | for (i = 0; i < MAX_REQ; i++) { |
583f21f8 SS |
3808 | QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
3809 | s->pdus[i].s = s; | |
3810 | s->pdus[i].idx = i; | |
2a0c56aa WL |
3811 | } |
3812 | ||
3813 | v9fs_path_init(&path); | |
3814 | ||
3815 | fse = get_fsdev_fsentry(s->fsconf.fsdev_id); | |
3816 | ||
3817 | if (!fse) { | |
3818 | /* We don't have a fsdev identified by fsdev_id */ | |
3819 | error_setg(errp, "9pfs device couldn't find fsdev with the " | |
3820 | "id = %s", | |
3821 | s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); | |
3822 | goto out; | |
3823 | } | |
3824 | ||
3825 | if (!s->fsconf.tag) { | |
3826 | /* we haven't specified a mount_tag */ | |
3827 | error_setg(errp, "fsdev with id %s needs mount_tag arguments", | |
3828 | s->fsconf.fsdev_id); | |
3829 | goto out; | |
3830 | } | |
3831 | ||
3832 | s->ctx.export_flags = fse->export_flags; | |
3833 | s->ctx.fs_root = g_strdup(fse->path); | |
3834 | s->ctx.exops.get_st_gen = NULL; | |
3835 | len = strlen(s->fsconf.tag); | |
3836 | if (len > MAX_TAG_LEN - 1) { | |
3837 | error_setg(errp, "mount tag '%s' (%d bytes) is longer than " | |
3838 | "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); | |
3839 | goto out; | |
3840 | } | |
3841 | ||
3842 | s->tag = g_strdup(s->fsconf.tag); | |
3843 | s->ctx.uid = -1; | |
3844 | ||
3845 | s->ops = fse->ops; | |
3846 | ||
b96feb2c TS |
3847 | s->ctx.fmode = fse->fmode; |
3848 | s->ctx.dmode = fse->dmode; | |
3849 | ||
2a0c56aa WL |
3850 | s->fid_list = NULL; |
3851 | qemu_co_rwlock_init(&s->rename_lock); | |
3852 | ||
65603a80 GK |
3853 | if (s->ops->init(&s->ctx, errp) < 0) { |
3854 | error_prepend(errp, "cannot initialize fsdev '%s': ", | |
3855 | s->fsconf.fsdev_id); | |
2a0c56aa WL |
3856 | goto out; |
3857 | } | |
3858 | ||
3859 | /* | |
3860 | * Check details of export path, We need to use fs driver | |
3861 | * call back to do that. Since we are in the init path, we don't | |
3862 | * use co-routines here. | |
3863 | */ | |
3864 | if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { | |
3865 | error_setg(errp, | |
3866 | "error in converting name to path %s", strerror(errno)); | |
3867 | goto out; | |
3868 | } | |
3869 | if (s->ops->lstat(&s->ctx, &path, &stat)) { | |
3870 | error_setg(errp, "share path %s does not exist", fse->path); | |
3871 | goto out; | |
3872 | } else if (!S_ISDIR(stat.st_mode)) { | |
3873 | error_setg(errp, "share path %s is not a directory", fse->path); | |
3874 | goto out; | |
3875 | } | |
b8bbdb88 | 3876 | |
3b5ee9e8 AM |
3877 | s->dev_id = stat.st_dev; |
3878 | ||
1a6ed33c AM |
3879 | qpp_table_init(&s->qpp_table); |
3880 | s->qp_prefix_next = 1; /* reserve 0 to detect overflow */ | |
f3fe4a2d | 3881 | s->qp_fullpath_next = 1; |
1a6ed33c | 3882 | |
b8bbdb88 PJ |
3883 | s->ctx.fst = &fse->fst; |
3884 | fsdev_throttle_init(s->ctx.fst); | |
3885 | ||
2a0c56aa WL |
3886 | rc = 0; |
3887 | out: | |
3888 | if (rc) { | |
c0da0cb7 | 3889 | v9fs_device_unrealize_common(s, NULL); |
2a0c56aa | 3890 | } |
c0da0cb7 | 3891 | v9fs_path_free(&path); |
2a0c56aa WL |
3892 | return rc; |
3893 | } | |
3894 | ||
3895 | void v9fs_device_unrealize_common(V9fsState *s, Error **errp) | |
3896 | { | |
c0da0cb7 | 3897 | if (s->ops && s->ops->cleanup) { |
702dbcc2 LQ |
3898 | s->ops->cleanup(&s->ctx); |
3899 | } | |
c0da0cb7 GK |
3900 | if (s->ctx.fst) { |
3901 | fsdev_throttle_cleanup(s->ctx.fst); | |
3902 | } | |
2a0c56aa | 3903 | g_free(s->tag); |
f3fe4a2d AM |
3904 | qp_table_destroy(&s->qpp_table); |
3905 | qp_table_destroy(&s->qpf_table); | |
4774718e | 3906 | g_free(s->ctx.fs_root); |
2a0c56aa WL |
3907 | } |
3908 | ||
0e44a0fd GK |
3909 | typedef struct VirtfsCoResetData { |
3910 | V9fsPDU pdu; | |
3911 | bool done; | |
3912 | } VirtfsCoResetData; | |
3913 | ||
3914 | static void coroutine_fn virtfs_co_reset(void *opaque) | |
3915 | { | |
3916 | VirtfsCoResetData *data = opaque; | |
3917 | ||
3918 | virtfs_reset(&data->pdu); | |
3919 | data->done = true; | |
3920 | } | |
3921 | ||
3922 | void v9fs_reset(V9fsState *s) | |
3923 | { | |
3924 | VirtfsCoResetData data = { .pdu = { .s = s }, .done = false }; | |
3925 | Coroutine *co; | |
3926 | ||
3927 | while (!QLIST_EMPTY(&s->active_list)) { | |
3928 | aio_poll(qemu_get_aio_context(), true); | |
3929 | } | |
3930 | ||
3931 | co = qemu_coroutine_create(virtfs_co_reset, &data); | |
3932 | qemu_coroutine_enter(co); | |
3933 | ||
3934 | while (!data.done) { | |
3935 | aio_poll(qemu_get_aio_context(), true); | |
3936 | } | |
3937 | } | |
3938 | ||
72a18977 | 3939 | static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) |
7a462745 AK |
3940 | { |
3941 | struct rlimit rlim; | |
3942 | if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { | |
63325b18 | 3943 | error_report("Failed to get the resource limit"); |
7a462745 AK |
3944 | exit(1); |
3945 | } | |
3946 | open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); | |
3947 | open_fd_rc = rlim.rlim_cur/2; | |
3948 | } |