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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" |
6b6aa828 | 30 | #include <math.h> |
03556ea9 | 31 | #include <linux/limits.h> |
9f107513 | 32 | |
7a462745 AK |
33 | int open_fd_hw; |
34 | int total_open_fd; | |
35 | static int open_fd_rc; | |
9f107513 | 36 | |
fac4f111 VJ |
37 | enum { |
38 | Oread = 0x00, | |
39 | Owrite = 0x01, | |
40 | Ordwr = 0x02, | |
41 | Oexec = 0x03, | |
42 | Oexcl = 0x04, | |
43 | Otrunc = 0x10, | |
44 | Orexec = 0x20, | |
45 | Orclose = 0x40, | |
46 | Oappend = 0x80, | |
47 | }; | |
48 | ||
75673590 | 49 | static ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
0e2082d9 WL |
50 | { |
51 | ssize_t ret; | |
52 | va_list ap; | |
53 | ||
54 | va_start(ap, fmt); | |
ea83441c | 55 | ret = pdu->s->transport->pdu_vmarshal(pdu, offset, fmt, ap); |
0e2082d9 WL |
56 | va_end(ap); |
57 | ||
58 | return ret; | |
59 | } | |
60 | ||
75673590 | 61 | static ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
0e2082d9 WL |
62 | { |
63 | ssize_t ret; | |
64 | va_list ap; | |
65 | ||
66 | va_start(ap, fmt); | |
ea83441c | 67 | ret = pdu->s->transport->pdu_vunmarshal(pdu, offset, fmt, ap); |
0e2082d9 WL |
68 | va_end(ap); |
69 | ||
70 | return ret; | |
71 | } | |
72 | ||
fac4f111 VJ |
73 | static int omode_to_uflags(int8_t mode) |
74 | { | |
75 | int ret = 0; | |
76 | ||
77 | switch (mode & 3) { | |
78 | case Oread: | |
79 | ret = O_RDONLY; | |
80 | break; | |
81 | case Ordwr: | |
82 | ret = O_RDWR; | |
83 | break; | |
84 | case Owrite: | |
85 | ret = O_WRONLY; | |
86 | break; | |
87 | case Oexec: | |
88 | ret = O_RDONLY; | |
89 | break; | |
90 | } | |
91 | ||
92 | if (mode & Otrunc) { | |
93 | ret |= O_TRUNC; | |
94 | } | |
95 | ||
96 | if (mode & Oappend) { | |
97 | ret |= O_APPEND; | |
98 | } | |
99 | ||
100 | if (mode & Oexcl) { | |
101 | ret |= O_EXCL; | |
102 | } | |
103 | ||
104 | return ret; | |
105 | } | |
106 | ||
8e71b96c | 107 | typedef struct DotlOpenflagMap { |
9844081b MK |
108 | int dotl_flag; |
109 | int open_flag; | |
8e71b96c | 110 | } DotlOpenflagMap; |
9844081b MK |
111 | |
112 | static int dotl_to_open_flags(int flags) | |
113 | { | |
114 | int i; | |
115 | /* | |
116 | * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY | |
117 | * and P9_DOTL_NOACCESS | |
118 | */ | |
119 | int oflags = flags & O_ACCMODE; | |
120 | ||
8e71b96c | 121 | DotlOpenflagMap dotl_oflag_map[] = { |
9844081b MK |
122 | { P9_DOTL_CREATE, O_CREAT }, |
123 | { P9_DOTL_EXCL, O_EXCL }, | |
124 | { P9_DOTL_NOCTTY , O_NOCTTY }, | |
125 | { P9_DOTL_TRUNC, O_TRUNC }, | |
126 | { P9_DOTL_APPEND, O_APPEND }, | |
127 | { P9_DOTL_NONBLOCK, O_NONBLOCK } , | |
128 | { P9_DOTL_DSYNC, O_DSYNC }, | |
129 | { P9_DOTL_FASYNC, FASYNC }, | |
130 | { P9_DOTL_DIRECT, O_DIRECT }, | |
131 | { P9_DOTL_LARGEFILE, O_LARGEFILE }, | |
132 | { P9_DOTL_DIRECTORY, O_DIRECTORY }, | |
133 | { P9_DOTL_NOFOLLOW, O_NOFOLLOW }, | |
134 | { P9_DOTL_NOATIME, O_NOATIME }, | |
135 | { P9_DOTL_SYNC, O_SYNC }, | |
136 | }; | |
137 | ||
138 | for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { | |
139 | if (flags & dotl_oflag_map[i].dotl_flag) { | |
140 | oflags |= dotl_oflag_map[i].open_flag; | |
141 | } | |
142 | } | |
143 | ||
144 | return oflags; | |
145 | } | |
146 | ||
758e8e38 | 147 | void cred_init(FsCred *credp) |
131dcb25 | 148 | { |
758e8e38 VJ |
149 | credp->fc_uid = -1; |
150 | credp->fc_gid = -1; | |
151 | credp->fc_mode = -1; | |
152 | credp->fc_rdev = -1; | |
131dcb25 AL |
153 | } |
154 | ||
d3ab98e6 AK |
155 | static int get_dotl_openflags(V9fsState *s, int oflags) |
156 | { | |
157 | int flags; | |
158 | /* | |
159 | * Filter the client open flags | |
160 | */ | |
9844081b MK |
161 | flags = dotl_to_open_flags(oflags); |
162 | flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); | |
d3ab98e6 AK |
163 | /* |
164 | * Ignore direct disk access hint until the server supports it. | |
165 | */ | |
166 | flags &= ~O_DIRECT; | |
167 | return flags; | |
168 | } | |
169 | ||
2289be19 AK |
170 | void v9fs_path_init(V9fsPath *path) |
171 | { | |
172 | path->data = NULL; | |
173 | path->size = 0; | |
174 | } | |
175 | ||
176 | void v9fs_path_free(V9fsPath *path) | |
177 | { | |
178 | g_free(path->data); | |
179 | path->data = NULL; | |
180 | path->size = 0; | |
181 | } | |
182 | ||
e3e83f2e GK |
183 | |
184 | void GCC_FMT_ATTR(2, 3) | |
185 | v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...) | |
186 | { | |
187 | va_list ap; | |
188 | ||
189 | v9fs_path_free(path); | |
190 | ||
191 | va_start(ap, fmt); | |
192 | /* Bump the size for including terminating NULL */ | |
193 | path->size = g_vasprintf(&path->data, fmt, ap) + 1; | |
194 | va_end(ap); | |
195 | } | |
196 | ||
e446a1eb | 197 | void v9fs_path_copy(V9fsPath *dst, const V9fsPath *src) |
2289be19 | 198 | { |
e446a1eb MAL |
199 | v9fs_path_free(dst); |
200 | dst->size = src->size; | |
201 | dst->data = g_memdup(src->data, src->size); | |
2289be19 AK |
202 | } |
203 | ||
204 | int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, | |
205 | const char *name, V9fsPath *path) | |
206 | { | |
207 | int err; | |
208 | err = s->ops->name_to_path(&s->ctx, dirpath, name, path); | |
209 | if (err < 0) { | |
210 | err = -errno; | |
211 | } | |
212 | return err; | |
213 | } | |
214 | ||
936532a4 MN |
215 | /* |
216 | * Return TRUE if s1 is an ancestor of s2. | |
217 | * | |
218 | * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". | |
219 | * As a special case, We treat s1 as ancestor of s2 if they are same! | |
220 | */ | |
2289be19 | 221 | static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) |
936532a4 | 222 | { |
2289be19 AK |
223 | if (!strncmp(s1->data, s2->data, s1->size - 1)) { |
224 | if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { | |
936532a4 MN |
225 | return 1; |
226 | } | |
227 | } | |
228 | return 0; | |
229 | } | |
230 | ||
a03f7874 AL |
231 | static size_t v9fs_string_size(V9fsString *str) |
232 | { | |
233 | return str->size; | |
234 | } | |
235 | ||
b9cb88b0 AK |
236 | /* |
237 | * returns 0 if fid got re-opened, 1 if not, < 0 on error */ | |
8440e22e | 238 | static int coroutine_fn v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) |
b9cb88b0 AK |
239 | { |
240 | int err = 1; | |
241 | if (f->fid_type == P9_FID_FILE) { | |
242 | if (f->fs.fd == -1) { | |
243 | do { | |
bccacf6c AK |
244 | err = v9fs_co_open(pdu, f, f->open_flags); |
245 | } while (err == -EINTR && !pdu->cancelled); | |
b9cb88b0 AK |
246 | } |
247 | } else if (f->fid_type == P9_FID_DIR) { | |
f314ea4e | 248 | if (f->fs.dir.stream == NULL) { |
b9cb88b0 | 249 | do { |
bccacf6c AK |
250 | err = v9fs_co_opendir(pdu, f); |
251 | } while (err == -EINTR && !pdu->cancelled); | |
b9cb88b0 AK |
252 | } |
253 | } | |
254 | return err; | |
255 | } | |
256 | ||
8440e22e | 257 | static V9fsFidState *coroutine_fn get_fid(V9fsPDU *pdu, int32_t fid) |
286d5652 | 258 | { |
7a462745 | 259 | int err; |
286d5652 | 260 | V9fsFidState *f; |
bccacf6c | 261 | V9fsState *s = pdu->s; |
286d5652 AL |
262 | |
263 | for (f = s->fid_list; f; f = f->next) { | |
84dfb926 | 264 | BUG_ON(f->clunked); |
286d5652 | 265 | if (f->fid == fid) { |
7a462745 AK |
266 | /* |
267 | * Update the fid ref upfront so that | |
268 | * we don't get reclaimed when we yield | |
269 | * in open later. | |
270 | */ | |
84dfb926 | 271 | f->ref++; |
7a462745 AK |
272 | /* |
273 | * check whether we need to reopen the | |
274 | * file. We might have closed the fd | |
275 | * while trying to free up some file | |
276 | * descriptors. | |
277 | */ | |
bccacf6c | 278 | err = v9fs_reopen_fid(pdu, f); |
b9cb88b0 AK |
279 | if (err < 0) { |
280 | f->ref--; | |
281 | return NULL; | |
282 | } | |
7a462745 AK |
283 | /* |
284 | * Mark the fid as referenced so that the LRU | |
285 | * reclaim won't close the file descriptor | |
286 | */ | |
287 | f->flags |= FID_REFERENCED; | |
286d5652 AL |
288 | return f; |
289 | } | |
290 | } | |
286d5652 AL |
291 | return NULL; |
292 | } | |
293 | ||
294 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
295 | { | |
296 | V9fsFidState *f; | |
297 | ||
84dfb926 AK |
298 | for (f = s->fid_list; f; f = f->next) { |
299 | /* If fid is already there return NULL */ | |
300 | BUG_ON(f->clunked); | |
301 | if (f->fid == fid) { | |
302 | return NULL; | |
303 | } | |
286d5652 | 304 | } |
7267c094 | 305 | f = g_malloc0(sizeof(V9fsFidState)); |
286d5652 | 306 | f->fid = fid; |
d62dbb51 | 307 | f->fid_type = P9_FID_NONE; |
84dfb926 | 308 | f->ref = 1; |
7a462745 AK |
309 | /* |
310 | * Mark the fid as referenced so that the LRU | |
311 | * reclaim won't close the file descriptor | |
312 | */ | |
313 | f->flags |= FID_REFERENCED; | |
286d5652 AL |
314 | f->next = s->fid_list; |
315 | s->fid_list = f; | |
316 | ||
7cde47d4 GK |
317 | v9fs_readdir_init(&f->fs.dir); |
318 | v9fs_readdir_init(&f->fs_reclaim.dir); | |
319 | ||
286d5652 AL |
320 | return f; |
321 | } | |
322 | ||
8440e22e | 323 | static int coroutine_fn v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) |
10b468bd AK |
324 | { |
325 | int retval = 0; | |
326 | ||
dd28fbbc | 327 | if (fidp->fs.xattr.xattrwalk_fid) { |
10b468bd AK |
328 | /* getxattr/listxattr fid */ |
329 | goto free_value; | |
330 | } | |
331 | /* | |
332 | * if this is fid for setxattr. clunk should | |
333 | * result in setxattr localcall | |
334 | */ | |
335 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { | |
336 | /* clunk after partial write */ | |
337 | retval = -EINVAL; | |
338 | goto free_out; | |
339 | } | |
9ed3ef26 | 340 | if (fidp->fs.xattr.len) { |
bccacf6c | 341 | retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, |
9ed3ef26 AK |
342 | fidp->fs.xattr.value, |
343 | fidp->fs.xattr.len, | |
344 | fidp->fs.xattr.flags); | |
345 | } else { | |
bccacf6c | 346 | retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); |
9ed3ef26 | 347 | } |
10b468bd AK |
348 | free_out: |
349 | v9fs_string_free(&fidp->fs.xattr.name); | |
350 | free_value: | |
9e288406 | 351 | g_free(fidp->fs.xattr.value); |
10b468bd AK |
352 | return retval; |
353 | } | |
354 | ||
8440e22e | 355 | static int coroutine_fn free_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
286d5652 | 356 | { |
10b468bd | 357 | int retval = 0; |
84dfb926 AK |
358 | |
359 | if (fidp->fid_type == P9_FID_FILE) { | |
7a462745 AK |
360 | /* If we reclaimed the fd no need to close */ |
361 | if (fidp->fs.fd != -1) { | |
cc720ddb | 362 | retval = v9fs_co_close(pdu, &fidp->fs); |
7a462745 | 363 | } |
84dfb926 | 364 | } else if (fidp->fid_type == P9_FID_DIR) { |
f314ea4e | 365 | if (fidp->fs.dir.stream != NULL) { |
cc720ddb | 366 | retval = v9fs_co_closedir(pdu, &fidp->fs); |
95f65511 | 367 | } |
84dfb926 | 368 | } else if (fidp->fid_type == P9_FID_XATTR) { |
bccacf6c | 369 | retval = v9fs_xattr_fid_clunk(pdu, fidp); |
84dfb926 | 370 | } |
2289be19 | 371 | v9fs_path_free(&fidp->path); |
84dfb926 AK |
372 | g_free(fidp); |
373 | return retval; | |
374 | } | |
375 | ||
8440e22e | 376 | static int coroutine_fn put_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
84dfb926 AK |
377 | { |
378 | BUG_ON(!fidp->ref); | |
379 | fidp->ref--; | |
7a462745 AK |
380 | /* |
381 | * Don't free the fid if it is in reclaim list | |
382 | */ | |
84dfb926 | 383 | if (!fidp->ref && fidp->clunked) { |
e9a0152b AK |
384 | if (fidp->fid == pdu->s->root_fid) { |
385 | /* | |
386 | * if the clunked fid is root fid then we | |
387 | * have unmounted the fs on the client side. | |
388 | * delete the migration blocker. Ideally, this | |
389 | * should be hooked to transport close notification | |
390 | */ | |
391 | if (pdu->s->migration_blocker) { | |
392 | migrate_del_blocker(pdu->s->migration_blocker); | |
393 | error_free(pdu->s->migration_blocker); | |
394 | pdu->s->migration_blocker = NULL; | |
395 | } | |
396 | } | |
a911a182 | 397 | return free_fid(pdu, fidp); |
84dfb926 | 398 | } |
a911a182 | 399 | return 0; |
84dfb926 AK |
400 | } |
401 | ||
ce421a19 | 402 | static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) |
84dfb926 | 403 | { |
286d5652 AL |
404 | V9fsFidState **fidpp, *fidp; |
405 | ||
406 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
407 | if ((*fidpp)->fid == fid) { | |
408 | break; | |
409 | } | |
410 | } | |
286d5652 | 411 | if (*fidpp == NULL) { |
ce421a19 | 412 | return NULL; |
286d5652 | 413 | } |
286d5652 AL |
414 | fidp = *fidpp; |
415 | *fidpp = fidp->next; | |
84dfb926 | 416 | fidp->clunked = 1; |
ce421a19 | 417 | return fidp; |
286d5652 AL |
418 | } |
419 | ||
8440e22e | 420 | void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu) |
7a462745 AK |
421 | { |
422 | int reclaim_count = 0; | |
bccacf6c | 423 | V9fsState *s = pdu->s; |
7a462745 AK |
424 | V9fsFidState *f, *reclaim_list = NULL; |
425 | ||
426 | for (f = s->fid_list; f; f = f->next) { | |
427 | /* | |
428 | * Unlink fids cannot be reclaimed. Check | |
429 | * for them and skip them. Also skip fids | |
430 | * currently being operated on. | |
431 | */ | |
432 | if (f->ref || f->flags & FID_NON_RECLAIMABLE) { | |
433 | continue; | |
434 | } | |
435 | /* | |
436 | * if it is a recently referenced fid | |
437 | * we leave the fid untouched and clear the | |
438 | * reference bit. We come back to it later | |
439 | * in the next iteration. (a simple LRU without | |
440 | * moving list elements around) | |
441 | */ | |
442 | if (f->flags & FID_REFERENCED) { | |
443 | f->flags &= ~FID_REFERENCED; | |
444 | continue; | |
445 | } | |
446 | /* | |
447 | * Add fids to reclaim list. | |
448 | */ | |
449 | if (f->fid_type == P9_FID_FILE) { | |
450 | if (f->fs.fd != -1) { | |
451 | /* | |
452 | * Up the reference count so that | |
453 | * a clunk request won't free this fid | |
454 | */ | |
455 | f->ref++; | |
456 | f->rclm_lst = reclaim_list; | |
457 | reclaim_list = f; | |
458 | f->fs_reclaim.fd = f->fs.fd; | |
459 | f->fs.fd = -1; | |
460 | reclaim_count++; | |
461 | } | |
95f65511 | 462 | } else if (f->fid_type == P9_FID_DIR) { |
f314ea4e | 463 | if (f->fs.dir.stream != NULL) { |
95f65511 AK |
464 | /* |
465 | * Up the reference count so that | |
466 | * a clunk request won't free this fid | |
467 | */ | |
468 | f->ref++; | |
469 | f->rclm_lst = reclaim_list; | |
470 | reclaim_list = f; | |
f314ea4e GK |
471 | f->fs_reclaim.dir.stream = f->fs.dir.stream; |
472 | f->fs.dir.stream = NULL; | |
95f65511 AK |
473 | reclaim_count++; |
474 | } | |
7a462745 AK |
475 | } |
476 | if (reclaim_count >= open_fd_rc) { | |
477 | break; | |
478 | } | |
479 | } | |
480 | /* | |
481 | * Now close the fid in reclaim list. Free them if they | |
482 | * are already clunked. | |
483 | */ | |
484 | while (reclaim_list) { | |
485 | f = reclaim_list; | |
486 | reclaim_list = f->rclm_lst; | |
487 | if (f->fid_type == P9_FID_FILE) { | |
cc720ddb | 488 | v9fs_co_close(pdu, &f->fs_reclaim); |
95f65511 | 489 | } else if (f->fid_type == P9_FID_DIR) { |
cc720ddb | 490 | v9fs_co_closedir(pdu, &f->fs_reclaim); |
7a462745 AK |
491 | } |
492 | f->rclm_lst = NULL; | |
493 | /* | |
494 | * Now drop the fid reference, free it | |
495 | * if clunked. | |
496 | */ | |
bccacf6c | 497 | put_fid(pdu, f); |
7a462745 AK |
498 | } |
499 | } | |
500 | ||
8440e22e | 501 | static int coroutine_fn v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) |
7a462745 AK |
502 | { |
503 | int err; | |
bccacf6c | 504 | V9fsState *s = pdu->s; |
7a462745 AK |
505 | V9fsFidState *fidp, head_fid; |
506 | ||
507 | head_fid.next = s->fid_list; | |
508 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2289be19 AK |
509 | if (fidp->path.size != path->size) { |
510 | continue; | |
511 | } | |
512 | if (!memcmp(fidp->path.data, path->data, path->size)) { | |
7a462745 AK |
513 | /* Mark the fid non reclaimable. */ |
514 | fidp->flags |= FID_NON_RECLAIMABLE; | |
b9cb88b0 AK |
515 | |
516 | /* reopen the file/dir if already closed */ | |
bccacf6c | 517 | err = v9fs_reopen_fid(pdu, fidp); |
b9cb88b0 | 518 | if (err < 0) { |
267fcadf | 519 | return err; |
b9cb88b0 AK |
520 | } |
521 | /* | |
522 | * Go back to head of fid list because | |
523 | * the list could have got updated when | |
524 | * switched to the worker thread | |
525 | */ | |
526 | if (err == 0) { | |
7a462745 AK |
527 | fidp = &head_fid; |
528 | } | |
529 | } | |
530 | } | |
531 | return 0; | |
532 | } | |
533 | ||
8440e22e | 534 | static void coroutine_fn virtfs_reset(V9fsPDU *pdu) |
b41e2992 DS |
535 | { |
536 | V9fsState *s = pdu->s; | |
79decce3 | 537 | V9fsFidState *fidp; |
b41e2992 DS |
538 | |
539 | /* Free all fids */ | |
540 | while (s->fid_list) { | |
6d54af0e | 541 | /* Get fid */ |
b41e2992 | 542 | fidp = s->fid_list; |
6d54af0e GK |
543 | fidp->ref++; |
544 | ||
545 | /* Clunk fid */ | |
b41e2992 | 546 | s->fid_list = fidp->next; |
6d54af0e | 547 | fidp->clunked = 1; |
b41e2992 | 548 | |
6d54af0e | 549 | put_fid(pdu, fidp); |
b41e2992 | 550 | } |
b41e2992 DS |
551 | } |
552 | ||
286d5652 AL |
553 | #define P9_QID_TYPE_DIR 0x80 |
554 | #define P9_QID_TYPE_SYMLINK 0x02 | |
555 | ||
556 | #define P9_STAT_MODE_DIR 0x80000000 | |
557 | #define P9_STAT_MODE_APPEND 0x40000000 | |
558 | #define P9_STAT_MODE_EXCL 0x20000000 | |
559 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
560 | #define P9_STAT_MODE_AUTH 0x08000000 | |
561 | #define P9_STAT_MODE_TMP 0x04000000 | |
562 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
563 | #define P9_STAT_MODE_LINK 0x01000000 | |
564 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
565 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
566 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
567 | #define P9_STAT_MODE_SETUID 0x00080000 | |
568 | #define P9_STAT_MODE_SETGID 0x00040000 | |
569 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
570 | ||
571 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
572 | P9_STAT_MODE_SYMLINK | \ | |
573 | P9_STAT_MODE_LINK | \ | |
574 | P9_STAT_MODE_DEVICE | \ | |
575 | P9_STAT_MODE_NAMED_PIPE | \ | |
576 | P9_STAT_MODE_SOCKET) | |
577 | ||
6b6aa828 CS |
578 | /* Mirrors all bits of a byte. So e.g. binary 10100000 would become 00000101. */ |
579 | static inline uint8_t mirror8bit(uint8_t byte) | |
580 | { | |
581 | return (byte * 0x0202020202ULL & 0x010884422010ULL) % 1023; | |
582 | } | |
583 | ||
584 | /* Same as mirror8bit() just for a 64 bit data type instead for a byte. */ | |
585 | static inline uint64_t mirror64bit(uint64_t value) | |
586 | { | |
587 | return ((uint64_t)mirror8bit(value & 0xff) << 56) | | |
588 | ((uint64_t)mirror8bit((value >> 8) & 0xff) << 48) | | |
589 | ((uint64_t)mirror8bit((value >> 16) & 0xff) << 40) | | |
590 | ((uint64_t)mirror8bit((value >> 24) & 0xff) << 32) | | |
591 | ((uint64_t)mirror8bit((value >> 32) & 0xff) << 24) | | |
592 | ((uint64_t)mirror8bit((value >> 40) & 0xff) << 16) | | |
593 | ((uint64_t)mirror8bit((value >> 48) & 0xff) << 8) | | |
594 | ((uint64_t)mirror8bit((value >> 56) & 0xff)); | |
595 | } | |
596 | ||
597 | /** | |
598 | * @brief Parameter k for the Exponential Golomb algorihm to be used. | |
599 | * | |
600 | * The smaller this value, the smaller the minimum bit count for the Exp. | |
601 | * Golomb generated affixes will be (at lowest index) however for the | |
602 | * price of having higher maximum bit count of generated affixes (at highest | |
603 | * index). Likewise increasing this parameter yields in smaller maximum bit | |
604 | * count for the price of having higher minimum bit count. | |
605 | * | |
606 | * In practice that means: a good value for k depends on the expected amount | |
607 | * of devices to be exposed by one export. For a small amount of devices k | |
608 | * should be small, for a large amount of devices k might be increased | |
609 | * instead. The default of k=0 should be fine for most users though. | |
610 | * | |
611 | * @b IMPORTANT: In case this ever becomes a runtime parameter; the value of | |
612 | * k should not change as long as guest is still running! Because that would | |
613 | * cause completely different inode numbers to be generated on guest. | |
614 | */ | |
615 | #define EXP_GOLOMB_K 0 | |
616 | ||
617 | /** | |
618 | * @brief Exponential Golomb algorithm for arbitrary k (including k=0). | |
619 | * | |
620 | * The Exponential Golomb algorithm generates @b prefixes (@b not suffixes!) | |
621 | * with growing length and with the mathematical property of being | |
622 | * "prefix-free". The latter means the generated prefixes can be prepended | |
623 | * in front of arbitrary numbers and the resulting concatenated numbers are | |
624 | * guaranteed to be always unique. | |
625 | * | |
626 | * This is a minor adjustment to the original Exp. Golomb algorithm in the | |
627 | * sense that lowest allowed index (@param n) starts with 1, not with zero. | |
628 | * | |
629 | * @param n - natural number (or index) of the prefix to be generated | |
630 | * (1, 2, 3, ...) | |
631 | * @param k - parameter k of Exp. Golomb algorithm to be used | |
632 | * (see comment on EXP_GOLOMB_K macro for details about k) | |
633 | */ | |
634 | static VariLenAffix expGolombEncode(uint64_t n, int k) | |
635 | { | |
636 | const uint64_t value = n + (1 << k) - 1; | |
637 | const int bits = (int) log2(value) + 1; | |
638 | return (VariLenAffix) { | |
639 | .type = AffixType_Prefix, | |
640 | .value = value, | |
641 | .bits = bits + MAX((bits - 1 - k), 0) | |
642 | }; | |
643 | } | |
644 | ||
645 | /** | |
646 | * @brief Converts a suffix into a prefix, or a prefix into a suffix. | |
647 | * | |
648 | * Simply mirror all bits of the affix value, for the purpose to preserve | |
649 | * respectively the mathematical "prefix-free" or "suffix-free" property | |
650 | * after the conversion. | |
651 | * | |
652 | * If a passed prefix is suitable to create unique numbers, then the | |
653 | * returned suffix is suitable to create unique numbers as well (and vice | |
654 | * versa). | |
655 | */ | |
656 | static VariLenAffix invertAffix(const VariLenAffix *affix) | |
657 | { | |
658 | return (VariLenAffix) { | |
659 | .type = | |
660 | (affix->type == AffixType_Suffix) ? | |
661 | AffixType_Prefix : AffixType_Suffix, | |
662 | .value = | |
663 | mirror64bit(affix->value) >> | |
664 | ((sizeof(affix->value) * 8) - affix->bits), | |
665 | .bits = affix->bits | |
666 | }; | |
667 | } | |
668 | ||
669 | /** | |
670 | * @brief Generates suffix numbers with "suffix-free" property. | |
671 | * | |
672 | * This is just a wrapper function on top of the Exp. Golomb algorithm. | |
673 | * | |
674 | * Since the Exp. Golomb algorithm generates prefixes, but we need suffixes, | |
675 | * this function converts the Exp. Golomb prefixes into appropriate suffixes | |
676 | * which are still suitable for generating unique numbers. | |
677 | * | |
678 | * @param n - natural number (or index) of the suffix to be generated | |
679 | * (1, 2, 3, ...) | |
680 | */ | |
681 | static VariLenAffix affixForIndex(uint64_t index) | |
682 | { | |
683 | VariLenAffix prefix; | |
684 | prefix = expGolombEncode(index, EXP_GOLOMB_K); | |
685 | return invertAffix(&prefix); /* convert prefix to suffix */ | |
686 | } | |
687 | ||
1a6ed33c AM |
688 | /* creative abuse of tb_hash_func7, which is based on xxhash */ |
689 | static uint32_t qpp_hash(QppEntry e) | |
690 | { | |
691 | return qemu_xxhash7(e.ino_prefix, e.dev, 0, 0, 0); | |
692 | } | |
693 | ||
f3fe4a2d AM |
694 | static uint32_t qpf_hash(QpfEntry e) |
695 | { | |
696 | return qemu_xxhash7(e.ino, e.dev, 0, 0, 0); | |
697 | } | |
698 | ||
6b6aa828 CS |
699 | static bool qpd_cmp_func(const void *obj, const void *userp) |
700 | { | |
701 | const QpdEntry *e1 = obj, *e2 = userp; | |
702 | return e1->dev == e2->dev; | |
703 | } | |
704 | ||
705 | static bool qpp_cmp_func(const void *obj, const void *userp) | |
1a6ed33c AM |
706 | { |
707 | const QppEntry *e1 = obj, *e2 = userp; | |
708 | return e1->dev == e2->dev && e1->ino_prefix == e2->ino_prefix; | |
709 | } | |
710 | ||
6b6aa828 | 711 | static bool qpf_cmp_func(const void *obj, const void *userp) |
f3fe4a2d AM |
712 | { |
713 | const QpfEntry *e1 = obj, *e2 = userp; | |
714 | return e1->dev == e2->dev && e1->ino == e2->ino; | |
715 | } | |
716 | ||
717 | static void qp_table_remove(void *p, uint32_t h, void *up) | |
1a6ed33c AM |
718 | { |
719 | g_free(p); | |
720 | } | |
721 | ||
f3fe4a2d | 722 | static void qp_table_destroy(struct qht *ht) |
1a6ed33c AM |
723 | { |
724 | if (!ht || !ht->map) { | |
725 | return; | |
726 | } | |
f3fe4a2d | 727 | qht_iter(ht, qp_table_remove, NULL); |
1a6ed33c AM |
728 | qht_destroy(ht); |
729 | } | |
730 | ||
6b6aa828 CS |
731 | static void qpd_table_init(struct qht *ht) |
732 | { | |
733 | qht_init(ht, qpd_cmp_func, 1, QHT_MODE_AUTO_RESIZE); | |
734 | } | |
735 | ||
1a6ed33c AM |
736 | static void qpp_table_init(struct qht *ht) |
737 | { | |
6b6aa828 | 738 | qht_init(ht, qpp_cmp_func, 1, QHT_MODE_AUTO_RESIZE); |
1a6ed33c AM |
739 | } |
740 | ||
f3fe4a2d AM |
741 | static void qpf_table_init(struct qht *ht) |
742 | { | |
6b6aa828 CS |
743 | qht_init(ht, qpf_cmp_func, 1 << 16, QHT_MODE_AUTO_RESIZE); |
744 | } | |
745 | ||
746 | /* | |
747 | * Returns how many (high end) bits of inode numbers of the passed fs | |
748 | * device shall be used (in combination with the device number) to | |
749 | * generate hash values for qpp_table entries. | |
750 | * | |
751 | * This function is required if variable length suffixes are used for inode | |
752 | * number mapping on guest level. Since a device may end up having multiple | |
753 | * entries in qpp_table, each entry most probably with a different suffix | |
754 | * length, we thus need this function in conjunction with qpd_table to | |
755 | * "agree" about a fix amount of bits (per device) to be always used for | |
756 | * generating hash values for the purpose of accessing qpp_table in order | |
757 | * get consistent behaviour when accessing qpp_table. | |
758 | */ | |
759 | static int qid_inode_prefix_hash_bits(V9fsPDU *pdu, dev_t dev) | |
760 | { | |
761 | QpdEntry lookup = { | |
762 | .dev = dev | |
763 | }, *val; | |
764 | uint32_t hash = dev; | |
765 | VariLenAffix affix; | |
766 | ||
767 | val = qht_lookup(&pdu->s->qpd_table, &lookup, hash); | |
768 | if (!val) { | |
769 | val = g_malloc0(sizeof(QpdEntry)); | |
770 | *val = lookup; | |
771 | affix = affixForIndex(pdu->s->qp_affix_next); | |
772 | val->prefix_bits = affix.bits; | |
773 | qht_insert(&pdu->s->qpd_table, val, hash, NULL); | |
774 | pdu->s->qp_ndevices++; | |
775 | } | |
776 | return val->prefix_bits; | |
f3fe4a2d AM |
777 | } |
778 | ||
6b6aa828 CS |
779 | /** |
780 | * @brief Slow / full mapping host inode nr -> guest inode nr. | |
781 | * | |
782 | * This function performs a slower and much more costly remapping of an | |
783 | * original file inode number on host to an appropriate different inode | |
784 | * number on guest. For every (dev, inode) combination on host a new | |
785 | * sequential number is generated, cached and exposed as inode number on | |
786 | * guest. | |
787 | * | |
788 | * This is just a "last resort" fallback solution if the much faster/cheaper | |
789 | * qid_path_suffixmap() failed. In practice this slow / full mapping is not | |
790 | * expected ever to be used at all though. | |
791 | * | |
792 | * @see qid_path_suffixmap() for details | |
793 | * | |
794 | */ | |
f3fe4a2d AM |
795 | static int qid_path_fullmap(V9fsPDU *pdu, const struct stat *stbuf, |
796 | uint64_t *path) | |
797 | { | |
798 | QpfEntry lookup = { | |
799 | .dev = stbuf->st_dev, | |
800 | .ino = stbuf->st_ino | |
801 | }, *val; | |
802 | uint32_t hash = qpf_hash(lookup); | |
6b6aa828 | 803 | VariLenAffix affix; |
f3fe4a2d AM |
804 | |
805 | val = qht_lookup(&pdu->s->qpf_table, &lookup, hash); | |
806 | ||
807 | if (!val) { | |
808 | if (pdu->s->qp_fullpath_next == 0) { | |
809 | /* no more files can be mapped :'( */ | |
810 | error_report_once( | |
811 | "9p: No more prefixes available for remapping inodes from " | |
812 | "host to guest." | |
813 | ); | |
814 | return -ENFILE; | |
815 | } | |
816 | ||
817 | val = g_malloc0(sizeof(QppEntry)); | |
818 | *val = lookup; | |
819 | ||
820 | /* new unique inode and device combo */ | |
6b6aa828 CS |
821 | affix = affixForIndex( |
822 | 1ULL << (sizeof(pdu->s->qp_affix_next) * 8) | |
823 | ); | |
824 | val->path = (pdu->s->qp_fullpath_next++ << affix.bits) | affix.value; | |
825 | pdu->s->qp_fullpath_next &= ((1ULL << (64 - affix.bits)) - 1); | |
f3fe4a2d AM |
826 | qht_insert(&pdu->s->qpf_table, val, hash, NULL); |
827 | } | |
828 | ||
829 | *path = val->path; | |
830 | return 0; | |
831 | } | |
832 | ||
6b6aa828 CS |
833 | /** |
834 | * @brief Quick mapping host inode nr -> guest inode nr. | |
1a6ed33c | 835 | * |
6b6aa828 CS |
836 | * This function performs quick remapping of an original file inode number |
837 | * on host to an appropriate different inode number on guest. This remapping | |
838 | * of inodes is required to avoid inode nr collisions on guest which would | |
839 | * happen if the 9p export contains more than 1 exported file system (or | |
840 | * more than 1 file system data set), because unlike on host level where the | |
841 | * files would have different device nrs, all files exported by 9p would | |
842 | * share the same device nr on guest (the device nr of the virtual 9p device | |
843 | * that is). | |
844 | * | |
845 | * Inode remapping is performed by chopping off high end bits of the original | |
846 | * inode number from host, shifting the result upwards and then assigning a | |
847 | * generated suffix number for the low end bits, where the same suffix number | |
848 | * will be shared by all inodes with the same device id AND the same high end | |
849 | * bits that have been chopped off. That approach utilizes the fact that inode | |
850 | * numbers very likely share the same high end bits (i.e. due to their common | |
851 | * sequential generation by file systems) and hence we only have to generate | |
852 | * and track a very limited amount of suffixes in practice due to that. | |
853 | * | |
854 | * We generate variable size suffixes for that purpose. The 1st generated | |
855 | * suffix will only have 1 bit and hence we only need to chop off 1 bit from | |
856 | * the original inode number. The subsequent suffixes being generated will | |
857 | * grow in (bit) size subsequently, i.e. the 2nd and 3rd suffix being | |
858 | * generated will have 3 bits and hence we have to chop off 3 bits from their | |
859 | * original inodes, and so on. That approach of using variable length suffixes | |
860 | * (i.e. over fixed size ones) utilizes the fact that in practice only a very | |
861 | * limited amount of devices are shared by the same export (e.g. typically | |
862 | * less than 2 dozen devices per 9p export), so in practice we need to chop | |
863 | * off less bits than with fixed size prefixes and yet are flexible to add | |
864 | * new devices at runtime below host's export directory at any time without | |
865 | * having to reboot guest nor requiring to reconfigure guest for that. And due | |
866 | * to the very limited amount of original high end bits that we chop off that | |
867 | * way, the total amount of suffixes we need to generate is less than by using | |
868 | * fixed size prefixes and hence it also improves performance of the inode | |
869 | * remapping algorithm, and finally has the nice side effect that the inode | |
870 | * numbers on guest will be much smaller & human friendly. ;-) | |
1a6ed33c | 871 | */ |
6b6aa828 | 872 | static int qid_path_suffixmap(V9fsPDU *pdu, const struct stat *stbuf, |
1a6ed33c AM |
873 | uint64_t *path) |
874 | { | |
6b6aa828 | 875 | const int ino_hash_bits = qid_inode_prefix_hash_bits(pdu, stbuf->st_dev); |
1a6ed33c AM |
876 | QppEntry lookup = { |
877 | .dev = stbuf->st_dev, | |
6b6aa828 | 878 | .ino_prefix = (uint16_t) (stbuf->st_ino >> (64 - ino_hash_bits)) |
1a6ed33c AM |
879 | }, *val; |
880 | uint32_t hash = qpp_hash(lookup); | |
881 | ||
882 | val = qht_lookup(&pdu->s->qpp_table, &lookup, hash); | |
883 | ||
884 | if (!val) { | |
6b6aa828 CS |
885 | if (pdu->s->qp_affix_next == 0) { |
886 | /* we ran out of affixes */ | |
f3fe4a2d AM |
887 | warn_report_once( |
888 | "9p: Potential degraded performance of inode remapping" | |
1a6ed33c AM |
889 | ); |
890 | return -ENFILE; | |
891 | } | |
892 | ||
893 | val = g_malloc0(sizeof(QppEntry)); | |
894 | *val = lookup; | |
895 | ||
6b6aa828 CS |
896 | /* new unique inode affix and device combo */ |
897 | val->qp_affix_index = pdu->s->qp_affix_next++; | |
898 | val->qp_affix = affixForIndex(val->qp_affix_index); | |
1a6ed33c AM |
899 | qht_insert(&pdu->s->qpp_table, val, hash, NULL); |
900 | } | |
6b6aa828 CS |
901 | /* assuming generated affix to be suffix type, not prefix */ |
902 | *path = (stbuf->st_ino << val->qp_affix.bits) | val->qp_affix.value; | |
1a6ed33c AM |
903 | return 0; |
904 | } | |
905 | ||
3b5ee9e8 | 906 | static int stat_to_qid(V9fsPDU *pdu, const struct stat *stbuf, V9fsQID *qidp) |
286d5652 | 907 | { |
1a6ed33c | 908 | int err; |
286d5652 AL |
909 | size_t size; |
910 | ||
1a6ed33c AM |
911 | if (pdu->s->ctx.export_flags & V9FS_REMAP_INODES) { |
912 | /* map inode+device to qid path (fast path) */ | |
6b6aa828 | 913 | err = qid_path_suffixmap(pdu, stbuf, &qidp->path); |
f3fe4a2d AM |
914 | if (err == -ENFILE) { |
915 | /* fast path didn't work, fall back to full map */ | |
916 | err = qid_path_fullmap(pdu, stbuf, &qidp->path); | |
917 | } | |
1a6ed33c AM |
918 | if (err) { |
919 | return err; | |
920 | } | |
921 | } else { | |
922 | if (pdu->s->dev_id != stbuf->st_dev) { | |
923 | if (pdu->s->ctx.export_flags & V9FS_FORBID_MULTIDEVS) { | |
924 | error_report_once( | |
925 | "9p: Multiple devices detected in same VirtFS export. " | |
926 | "Access of guest to additional devices is (partly) " | |
927 | "denied due to virtfs option 'multidevs=forbid' being " | |
928 | "effective." | |
929 | ); | |
930 | return -ENODEV; | |
931 | } else { | |
932 | warn_report_once( | |
933 | "9p: Multiple devices detected in same VirtFS export, " | |
934 | "which might lead to file ID collisions and severe " | |
935 | "misbehaviours on guest! You should either use a " | |
936 | "separate export for each device shared from host or " | |
937 | "use virtfs option 'multidevs=remap'!" | |
938 | ); | |
939 | } | |
940 | } | |
941 | memset(&qidp->path, 0, sizeof(qidp->path)); | |
942 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
943 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
3b5ee9e8 AM |
944 | } |
945 | ||
286d5652 AL |
946 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); |
947 | qidp->type = 0; | |
948 | if (S_ISDIR(stbuf->st_mode)) { | |
949 | qidp->type |= P9_QID_TYPE_DIR; | |
950 | } | |
951 | if (S_ISLNK(stbuf->st_mode)) { | |
952 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
953 | } | |
3b5ee9e8 AM |
954 | |
955 | return 0; | |
286d5652 AL |
956 | } |
957 | ||
8440e22e GK |
958 | static int coroutine_fn fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, |
959 | V9fsQID *qidp) | |
286d5652 AL |
960 | { |
961 | struct stat stbuf; | |
962 | int err; | |
963 | ||
bccacf6c | 964 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
8c158561 | 965 | if (err < 0) { |
286d5652 AL |
966 | return err; |
967 | } | |
3b5ee9e8 AM |
968 | err = stat_to_qid(pdu, &stbuf, qidp); |
969 | if (err < 0) { | |
970 | return err; | |
971 | } | |
286d5652 AL |
972 | return 0; |
973 | } | |
974 | ||
4b311c5f | 975 | V9fsPDU *pdu_alloc(V9fsState *s) |
9f107513 AL |
976 | { |
977 | V9fsPDU *pdu = NULL; | |
978 | ||
979 | if (!QLIST_EMPTY(&s->free_list)) { | |
bccacf6c AK |
980 | pdu = QLIST_FIRST(&s->free_list); |
981 | QLIST_REMOVE(pdu, next); | |
982 | QLIST_INSERT_HEAD(&s->active_list, pdu, next); | |
9f107513 AL |
983 | } |
984 | return pdu; | |
985 | } | |
986 | ||
4b311c5f | 987 | void pdu_free(V9fsPDU *pdu) |
9f107513 | 988 | { |
6868a420 | 989 | V9fsState *s = pdu->s; |
f74e27bf GK |
990 | |
991 | g_assert(!pdu->cancelled); | |
992 | QLIST_REMOVE(pdu, next); | |
993 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
9f107513 AL |
994 | } |
995 | ||
8440e22e | 996 | static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len) |
405a549a AL |
997 | { |
998 | int8_t id = pdu->id + 1; /* Response */ | |
ad38ce9e | 999 | V9fsState *s = pdu->s; |
06a37db7 | 1000 | int ret; |
405a549a | 1001 | |
fc78d5ee KF |
1002 | /* |
1003 | * The 9p spec requires that successfully cancelled pdus receive no reply. | |
1004 | * Sending a reply would confuse clients because they would | |
1005 | * assume that any EINTR is the actual result of the operation, | |
1006 | * rather than a consequence of the cancellation. However, if | |
1007 | * the operation completed (succesfully or with an error other | |
1008 | * than caused be cancellation), we do send out that reply, both | |
1009 | * for efficiency and to avoid confusing the rest of the state machine | |
1010 | * that assumes passing a non-error here will mean a successful | |
1011 | * transmission of the reply. | |
1012 | */ | |
1013 | bool discard = pdu->cancelled && len == -EINTR; | |
1014 | if (discard) { | |
1015 | trace_v9fs_rcancel(pdu->tag, pdu->id); | |
1016 | pdu->size = 0; | |
1017 | goto out_notify; | |
1018 | } | |
1019 | ||
405a549a | 1020 | if (len < 0) { |
405a549a | 1021 | int err = -len; |
8f4d1ca5 | 1022 | len = 7; |
405a549a | 1023 | |
8f4d1ca5 AB |
1024 | if (s->proto_version != V9FS_PROTO_2000L) { |
1025 | V9fsString str; | |
1026 | ||
1027 | str.data = strerror(err); | |
1028 | str.size = strlen(str.data); | |
1029 | ||
06a37db7 GK |
1030 | ret = pdu_marshal(pdu, len, "s", &str); |
1031 | if (ret < 0) { | |
1032 | goto out_notify; | |
1033 | } | |
1034 | len += ret; | |
8f4d1ca5 AB |
1035 | id = P9_RERROR; |
1036 | } | |
405a549a | 1037 | |
06a37db7 GK |
1038 | ret = pdu_marshal(pdu, len, "d", err); |
1039 | if (ret < 0) { | |
1040 | goto out_notify; | |
1041 | } | |
1042 | len += ret; | |
405a549a | 1043 | |
8f4d1ca5 AB |
1044 | if (s->proto_version == V9FS_PROTO_2000L) { |
1045 | id = P9_RLERROR; | |
1046 | } | |
7999f7e1 | 1047 | trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ |
405a549a AL |
1048 | } |
1049 | ||
1050 | /* fill out the header */ | |
06a37db7 GK |
1051 | if (pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag) < 0) { |
1052 | goto out_notify; | |
1053 | } | |
405a549a AL |
1054 | |
1055 | /* keep these in sync */ | |
1056 | pdu->size = len; | |
1057 | pdu->id = id; | |
1058 | ||
06a37db7 | 1059 | out_notify: |
a17d8659 | 1060 | pdu->s->transport->push_and_notify(pdu); |
405a549a | 1061 | |
bccacf6c | 1062 | /* Now wakeup anybody waiting in flush for this request */ |
f74e27bf GK |
1063 | if (!qemu_co_queue_next(&pdu->complete)) { |
1064 | pdu_free(pdu); | |
1065 | } | |
405a549a AL |
1066 | } |
1067 | ||
bb9e3216 AL |
1068 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
1069 | { | |
1070 | mode_t ret; | |
1071 | ||
1072 | ret = mode & 0777; | |
1073 | if (mode & P9_STAT_MODE_DIR) { | |
1074 | ret |= S_IFDIR; | |
1075 | } | |
1076 | ||
cf03eb2c AB |
1077 | if (mode & P9_STAT_MODE_SYMLINK) { |
1078 | ret |= S_IFLNK; | |
1079 | } | |
1080 | if (mode & P9_STAT_MODE_SOCKET) { | |
1081 | ret |= S_IFSOCK; | |
1082 | } | |
1083 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
1084 | ret |= S_IFIFO; | |
1085 | } | |
1086 | if (mode & P9_STAT_MODE_DEVICE) { | |
c7e587b7 | 1087 | if (extension->size && extension->data[0] == 'c') { |
cf03eb2c AB |
1088 | ret |= S_IFCHR; |
1089 | } else { | |
1090 | ret |= S_IFBLK; | |
bb9e3216 AL |
1091 | } |
1092 | } | |
1093 | ||
1094 | if (!(ret&~0777)) { | |
1095 | ret |= S_IFREG; | |
1096 | } | |
1097 | ||
1098 | if (mode & P9_STAT_MODE_SETUID) { | |
1099 | ret |= S_ISUID; | |
1100 | } | |
1101 | if (mode & P9_STAT_MODE_SETGID) { | |
1102 | ret |= S_ISGID; | |
1103 | } | |
1104 | if (mode & P9_STAT_MODE_SETVTX) { | |
1105 | ret |= S_ISVTX; | |
1106 | } | |
1107 | ||
1108 | return ret; | |
1109 | } | |
1110 | ||
1111 | static int donttouch_stat(V9fsStat *stat) | |
1112 | { | |
1113 | if (stat->type == -1 && | |
1114 | stat->dev == -1 && | |
87032833 AM |
1115 | stat->qid.type == 0xff && |
1116 | stat->qid.version == (uint32_t) -1 && | |
1117 | stat->qid.path == (uint64_t) -1 && | |
bb9e3216 AL |
1118 | stat->mode == -1 && |
1119 | stat->atime == -1 && | |
1120 | stat->mtime == -1 && | |
1121 | stat->length == -1 && | |
1122 | !stat->name.size && | |
1123 | !stat->uid.size && | |
1124 | !stat->gid.size && | |
1125 | !stat->muid.size && | |
1126 | stat->n_uid == -1 && | |
1127 | stat->n_gid == -1 && | |
1128 | stat->n_muid == -1) { | |
1129 | return 1; | |
1130 | } | |
1131 | ||
1132 | return 0; | |
1133 | } | |
1134 | ||
ddca7f86 MK |
1135 | static void v9fs_stat_init(V9fsStat *stat) |
1136 | { | |
1137 | v9fs_string_init(&stat->name); | |
1138 | v9fs_string_init(&stat->uid); | |
1139 | v9fs_string_init(&stat->gid); | |
1140 | v9fs_string_init(&stat->muid); | |
1141 | v9fs_string_init(&stat->extension); | |
1142 | } | |
1143 | ||
bb9e3216 AL |
1144 | static void v9fs_stat_free(V9fsStat *stat) |
1145 | { | |
1146 | v9fs_string_free(&stat->name); | |
1147 | v9fs_string_free(&stat->uid); | |
1148 | v9fs_string_free(&stat->gid); | |
1149 | v9fs_string_free(&stat->muid); | |
1150 | v9fs_string_free(&stat->extension); | |
1151 | } | |
1152 | ||
1153 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
1154 | { | |
1155 | uint32_t mode; | |
1156 | ||
1157 | mode = stbuf->st_mode & 0777; | |
1158 | if (S_ISDIR(stbuf->st_mode)) { | |
1159 | mode |= P9_STAT_MODE_DIR; | |
1160 | } | |
1161 | ||
cf03eb2c AB |
1162 | if (S_ISLNK(stbuf->st_mode)) { |
1163 | mode |= P9_STAT_MODE_SYMLINK; | |
1164 | } | |
bb9e3216 | 1165 | |
cf03eb2c AB |
1166 | if (S_ISSOCK(stbuf->st_mode)) { |
1167 | mode |= P9_STAT_MODE_SOCKET; | |
1168 | } | |
bb9e3216 | 1169 | |
cf03eb2c AB |
1170 | if (S_ISFIFO(stbuf->st_mode)) { |
1171 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
1172 | } | |
bb9e3216 | 1173 | |
cf03eb2c AB |
1174 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { |
1175 | mode |= P9_STAT_MODE_DEVICE; | |
1176 | } | |
bb9e3216 | 1177 | |
cf03eb2c AB |
1178 | if (stbuf->st_mode & S_ISUID) { |
1179 | mode |= P9_STAT_MODE_SETUID; | |
1180 | } | |
bb9e3216 | 1181 | |
cf03eb2c AB |
1182 | if (stbuf->st_mode & S_ISGID) { |
1183 | mode |= P9_STAT_MODE_SETGID; | |
1184 | } | |
bb9e3216 | 1185 | |
cf03eb2c AB |
1186 | if (stbuf->st_mode & S_ISVTX) { |
1187 | mode |= P9_STAT_MODE_SETVTX; | |
bb9e3216 AL |
1188 | } |
1189 | ||
1190 | return mode; | |
1191 | } | |
1192 | ||
6069537f JD |
1193 | static int coroutine_fn stat_to_v9stat(V9fsPDU *pdu, V9fsPath *path, |
1194 | const char *basename, | |
8440e22e GK |
1195 | const struct stat *stbuf, |
1196 | V9fsStat *v9stat) | |
bb9e3216 AL |
1197 | { |
1198 | int err; | |
bb9e3216 AL |
1199 | |
1200 | memset(v9stat, 0, sizeof(*v9stat)); | |
1201 | ||
3b5ee9e8 AM |
1202 | err = stat_to_qid(pdu, stbuf, &v9stat->qid); |
1203 | if (err < 0) { | |
1204 | return err; | |
1205 | } | |
bb9e3216 AL |
1206 | v9stat->mode = stat_to_v9mode(stbuf); |
1207 | v9stat->atime = stbuf->st_atime; | |
1208 | v9stat->mtime = stbuf->st_mtime; | |
1209 | v9stat->length = stbuf->st_size; | |
1210 | ||
abdf0086 GK |
1211 | v9fs_string_free(&v9stat->uid); |
1212 | v9fs_string_free(&v9stat->gid); | |
1213 | v9fs_string_free(&v9stat->muid); | |
bb9e3216 | 1214 | |
cf03eb2c AB |
1215 | v9stat->n_uid = stbuf->st_uid; |
1216 | v9stat->n_gid = stbuf->st_gid; | |
1217 | v9stat->n_muid = 0; | |
bb9e3216 | 1218 | |
abdf0086 | 1219 | v9fs_string_free(&v9stat->extension); |
bb9e3216 | 1220 | |
cf03eb2c | 1221 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { |
6069537f | 1222 | err = v9fs_co_readlink(pdu, path, &v9stat->extension); |
7a5ca31e | 1223 | if (err < 0) { |
cf03eb2c | 1224 | return err; |
bb9e3216 | 1225 | } |
cf03eb2c AB |
1226 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1227 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
1228 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
1229 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
1230 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
c9ba47dc SW |
1231 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
1232 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); | |
bb9e3216 AL |
1233 | } |
1234 | ||
6069537f | 1235 | v9fs_string_sprintf(&v9stat->name, "%s", basename); |
bb9e3216 AL |
1236 | |
1237 | v9stat->size = 61 + | |
1238 | v9fs_string_size(&v9stat->name) + | |
1239 | v9fs_string_size(&v9stat->uid) + | |
1240 | v9fs_string_size(&v9stat->gid) + | |
1241 | v9fs_string_size(&v9stat->muid) + | |
1242 | v9fs_string_size(&v9stat->extension); | |
1243 | return 0; | |
1244 | } | |
1245 | ||
00ede4c2 SK |
1246 | #define P9_STATS_MODE 0x00000001ULL |
1247 | #define P9_STATS_NLINK 0x00000002ULL | |
1248 | #define P9_STATS_UID 0x00000004ULL | |
1249 | #define P9_STATS_GID 0x00000008ULL | |
1250 | #define P9_STATS_RDEV 0x00000010ULL | |
1251 | #define P9_STATS_ATIME 0x00000020ULL | |
1252 | #define P9_STATS_MTIME 0x00000040ULL | |
1253 | #define P9_STATS_CTIME 0x00000080ULL | |
1254 | #define P9_STATS_INO 0x00000100ULL | |
1255 | #define P9_STATS_SIZE 0x00000200ULL | |
1256 | #define P9_STATS_BLOCKS 0x00000400ULL | |
1257 | ||
1258 | #define P9_STATS_BTIME 0x00000800ULL | |
1259 | #define P9_STATS_GEN 0x00001000ULL | |
1260 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
1261 | ||
1262 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
1263 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
1264 | ||
1265 | ||
3b5ee9e8 | 1266 | static int stat_to_v9stat_dotl(V9fsPDU *pdu, const struct stat *stbuf, |
8db21ce7 | 1267 | V9fsStatDotl *v9lstat) |
00ede4c2 SK |
1268 | { |
1269 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
1270 | ||
1271 | v9lstat->st_mode = stbuf->st_mode; | |
1272 | v9lstat->st_nlink = stbuf->st_nlink; | |
1273 | v9lstat->st_uid = stbuf->st_uid; | |
1274 | v9lstat->st_gid = stbuf->st_gid; | |
1275 | v9lstat->st_rdev = stbuf->st_rdev; | |
1276 | v9lstat->st_size = stbuf->st_size; | |
1277 | v9lstat->st_blksize = stbuf->st_blksize; | |
1278 | v9lstat->st_blocks = stbuf->st_blocks; | |
1279 | v9lstat->st_atime_sec = stbuf->st_atime; | |
1280 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
1281 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
1282 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
1283 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
1284 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
1285 | /* Currently we only support BASIC fields in stat */ | |
1286 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
1287 | ||
3b5ee9e8 | 1288 | return stat_to_qid(pdu, stbuf, &v9lstat->qid); |
00ede4c2 SK |
1289 | } |
1290 | ||
1f5a89bf AL |
1291 | static void print_sg(struct iovec *sg, int cnt) |
1292 | { | |
1293 | int i; | |
1294 | ||
1295 | printf("sg[%d]: {", cnt); | |
1296 | for (i = 0; i < cnt; i++) { | |
1297 | if (i) { | |
1298 | printf(", "); | |
1299 | } | |
1300 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1301 | } | |
1302 | printf("}\n"); | |
1303 | } | |
1304 | ||
2289be19 AK |
1305 | /* Will call this only for path name based fid */ |
1306 | static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) | |
8cf89e00 | 1307 | { |
2289be19 AK |
1308 | V9fsPath str; |
1309 | v9fs_path_init(&str); | |
1310 | v9fs_path_copy(&str, dst); | |
e3e83f2e | 1311 | v9fs_path_sprintf(dst, "%s%s", src->data, str.data + len); |
2289be19 | 1312 | v9fs_path_free(&str); |
8cf89e00 AL |
1313 | } |
1314 | ||
2c74c2cb MK |
1315 | static inline bool is_ro_export(FsContext *ctx) |
1316 | { | |
1317 | return ctx->export_flags & V9FS_RDONLY; | |
1318 | } | |
1319 | ||
8440e22e | 1320 | static void coroutine_fn v9fs_version(void *opaque) |
9f107513 | 1321 | { |
ddca7f86 | 1322 | ssize_t err; |
ff06030f VJ |
1323 | V9fsPDU *pdu = opaque; |
1324 | V9fsState *s = pdu->s; | |
92c1ad03 AL |
1325 | V9fsString version; |
1326 | size_t offset = 7; | |
1327 | ||
ddca7f86 MK |
1328 | v9fs_string_init(&version); |
1329 | err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); | |
1330 | if (err < 0) { | |
ddca7f86 MK |
1331 | goto out; |
1332 | } | |
c572f23a | 1333 | trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); |
92c1ad03 | 1334 | |
b41e2992 DS |
1335 | virtfs_reset(pdu); |
1336 | ||
84151514 MK |
1337 | if (!strcmp(version.data, "9P2000.u")) { |
1338 | s->proto_version = V9FS_PROTO_2000U; | |
1339 | } else if (!strcmp(version.data, "9P2000.L")) { | |
1340 | s->proto_version = V9FS_PROTO_2000L; | |
1341 | } else { | |
92c1ad03 | 1342 | v9fs_string_sprintf(&version, "unknown"); |
e16453a3 CS |
1343 | /* skip min. msize check, reporting invalid version has priority */ |
1344 | goto marshal; | |
9f107513 | 1345 | } |
92c1ad03 | 1346 | |
e16453a3 CS |
1347 | if (s->msize < P9_MIN_MSIZE) { |
1348 | err = -EMSGSIZE; | |
1349 | error_report( | |
1350 | "9pfs: Client requested msize < minimum msize (" | |
1351 | stringify(P9_MIN_MSIZE) ") supported by this server." | |
1352 | ); | |
1353 | goto out; | |
1354 | } | |
1355 | ||
1356 | marshal: | |
ddca7f86 MK |
1357 | err = pdu_marshal(pdu, offset, "ds", s->msize, &version); |
1358 | if (err < 0) { | |
ddca7f86 MK |
1359 | goto out; |
1360 | } | |
403a905b | 1361 | err += offset; |
c572f23a | 1362 | trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); |
ddca7f86 | 1363 | out: |
403a905b | 1364 | pdu_complete(pdu, err); |
92c1ad03 | 1365 | v9fs_string_free(&version); |
9f107513 AL |
1366 | } |
1367 | ||
8440e22e | 1368 | static void coroutine_fn v9fs_attach(void *opaque) |
9f107513 | 1369 | { |
ff06030f VJ |
1370 | V9fsPDU *pdu = opaque; |
1371 | V9fsState *s = pdu->s; | |
955efc47 AL |
1372 | int32_t fid, afid, n_uname; |
1373 | V9fsString uname, aname; | |
1374 | V9fsFidState *fidp; | |
955efc47 | 1375 | size_t offset = 7; |
8c158561 | 1376 | V9fsQID qid; |
955efc47 AL |
1377 | ssize_t err; |
1378 | ||
ddca7f86 MK |
1379 | v9fs_string_init(&uname); |
1380 | v9fs_string_init(&aname); | |
1381 | err = pdu_unmarshal(pdu, offset, "ddssd", &fid, | |
1382 | &afid, &uname, &aname, &n_uname); | |
1383 | if (err < 0) { | |
1384 | goto out_nofid; | |
1385 | } | |
c572f23a | 1386 | trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); |
955efc47 AL |
1387 | |
1388 | fidp = alloc_fid(s, fid); | |
1389 | if (fidp == NULL) { | |
1390 | err = -EINVAL; | |
84dfb926 | 1391 | goto out_nofid; |
9f107513 | 1392 | } |
955efc47 | 1393 | fidp->uid = n_uname; |
bccacf6c | 1394 | err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); |
2289be19 AK |
1395 | if (err < 0) { |
1396 | err = -EINVAL; | |
1397 | clunk_fid(s, fid); | |
1398 | goto out; | |
1399 | } | |
bccacf6c | 1400 | err = fid_to_qid(pdu, fidp, &qid); |
8c158561 | 1401 | if (err < 0) { |
955efc47 | 1402 | err = -EINVAL; |
84dfb926 | 1403 | clunk_fid(s, fid); |
955efc47 AL |
1404 | goto out; |
1405 | } | |
fe44dc91 | 1406 | |
4cdc0789 AK |
1407 | /* |
1408 | * disable migration if we haven't done already. | |
1409 | * attach could get called multiple times for the same export. | |
1410 | */ | |
1411 | if (!s->migration_blocker) { | |
f231b88d CR |
1412 | error_setg(&s->migration_blocker, |
1413 | "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", | |
1414 | s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); | |
9261ef5e MA |
1415 | err = migrate_add_blocker(s->migration_blocker, NULL); |
1416 | if (err < 0) { | |
fe44dc91 AA |
1417 | error_free(s->migration_blocker); |
1418 | s->migration_blocker = NULL; | |
1419 | clunk_fid(s, fid); | |
1420 | goto out; | |
1421 | } | |
1422 | s->root_fid = fid; | |
1423 | } | |
1424 | ||
1425 | err = pdu_marshal(pdu, offset, "Q", &qid); | |
1426 | if (err < 0) { | |
1427 | clunk_fid(s, fid); | |
1428 | goto out; | |
4cdc0789 | 1429 | } |
fe44dc91 AA |
1430 | err += offset; |
1431 | ||
1432 | memcpy(&s->root_qid, &qid, sizeof(qid)); | |
1433 | trace_v9fs_attach_return(pdu->tag, pdu->id, | |
1434 | qid.type, qid.version, qid.path); | |
955efc47 | 1435 | out: |
bccacf6c | 1436 | put_fid(pdu, fidp); |
84dfb926 | 1437 | out_nofid: |
dc295f83 | 1438 | pdu_complete(pdu, err); |
955efc47 AL |
1439 | v9fs_string_free(&uname); |
1440 | v9fs_string_free(&aname); | |
9f107513 AL |
1441 | } |
1442 | ||
8440e22e | 1443 | static void coroutine_fn v9fs_stat(void *opaque) |
9f107513 | 1444 | { |
4da7d3fa | 1445 | int32_t fid; |
d8e0c29e | 1446 | V9fsStat v9stat; |
4da7d3fa | 1447 | ssize_t err = 0; |
d8e0c29e AK |
1448 | size_t offset = 7; |
1449 | struct stat stbuf; | |
1450 | V9fsFidState *fidp; | |
1451 | V9fsPDU *pdu = opaque; | |
6069537f | 1452 | char *basename; |
4da7d3fa | 1453 | |
ddca7f86 MK |
1454 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
1455 | if (err < 0) { | |
1456 | goto out_nofid; | |
1457 | } | |
c572f23a | 1458 | trace_v9fs_stat(pdu->tag, pdu->id, fid); |
84dfb926 | 1459 | |
bccacf6c | 1460 | fidp = get_fid(pdu, fid); |
d8e0c29e | 1461 | if (fidp == NULL) { |
4da7d3fa | 1462 | err = -ENOENT; |
84dfb926 | 1463 | goto out_nofid; |
9f107513 | 1464 | } |
bccacf6c | 1465 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
d8e0c29e AK |
1466 | if (err < 0) { |
1467 | goto out; | |
1468 | } | |
6069537f JD |
1469 | basename = g_path_get_basename(fidp->path.data); |
1470 | err = stat_to_v9stat(pdu, &fidp->path, basename, &stbuf, &v9stat); | |
1471 | g_free(basename); | |
d8e0c29e AK |
1472 | if (err < 0) { |
1473 | goto out; | |
1474 | } | |
ddca7f86 MK |
1475 | err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); |
1476 | if (err < 0) { | |
1477 | v9fs_stat_free(&v9stat); | |
1478 | goto out; | |
1479 | } | |
7999f7e1 AK |
1480 | trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, |
1481 | v9stat.atime, v9stat.mtime, v9stat.length); | |
ddca7f86 | 1482 | err += offset; |
d8e0c29e | 1483 | v9fs_stat_free(&v9stat); |
4da7d3fa | 1484 | out: |
bccacf6c | 1485 | put_fid(pdu, fidp); |
84dfb926 | 1486 | out_nofid: |
dc295f83 | 1487 | pdu_complete(pdu, err); |
9f107513 AL |
1488 | } |
1489 | ||
8440e22e | 1490 | static void coroutine_fn v9fs_getattr(void *opaque) |
00ede4c2 SK |
1491 | { |
1492 | int32_t fid; | |
8db21ce7 AK |
1493 | size_t offset = 7; |
1494 | ssize_t retval = 0; | |
1495 | struct stat stbuf; | |
00ede4c2 SK |
1496 | V9fsFidState *fidp; |
1497 | uint64_t request_mask; | |
8db21ce7 AK |
1498 | V9fsStatDotl v9stat_dotl; |
1499 | V9fsPDU *pdu = opaque; | |
00ede4c2 | 1500 | |
ddca7f86 MK |
1501 | retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); |
1502 | if (retval < 0) { | |
1503 | goto out_nofid; | |
1504 | } | |
c572f23a | 1505 | trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); |
00ede4c2 | 1506 | |
bccacf6c | 1507 | fidp = get_fid(pdu, fid); |
00ede4c2 | 1508 | if (fidp == NULL) { |
8db21ce7 | 1509 | retval = -ENOENT; |
84dfb926 | 1510 | goto out_nofid; |
00ede4c2 | 1511 | } |
8db21ce7 AK |
1512 | /* |
1513 | * Currently we only support BASIC fields in stat, so there is no | |
00ede4c2 SK |
1514 | * need to look at request_mask. |
1515 | */ | |
bccacf6c | 1516 | retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
8db21ce7 AK |
1517 | if (retval < 0) { |
1518 | goto out; | |
1519 | } | |
3b5ee9e8 AM |
1520 | retval = stat_to_v9stat_dotl(pdu, &stbuf, &v9stat_dotl); |
1521 | if (retval < 0) { | |
1522 | goto out; | |
1523 | } | |
e06a765e HPB |
1524 | |
1525 | /* fill st_gen if requested and supported by underlying fs */ | |
1526 | if (request_mask & P9_STATS_GEN) { | |
1527 | retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); | |
f8b7ee38 KS |
1528 | switch (retval) { |
1529 | case 0: | |
1530 | /* we have valid st_gen: update result mask */ | |
1531 | v9stat_dotl.st_result_mask |= P9_STATS_GEN; | |
1532 | break; | |
1533 | case -EINTR: | |
1534 | /* request cancelled, e.g. by Tflush */ | |
e06a765e | 1535 | goto out; |
f8b7ee38 KS |
1536 | default: |
1537 | /* failed to get st_gen: not fatal, ignore */ | |
1538 | break; | |
e06a765e | 1539 | } |
e06a765e | 1540 | } |
ddca7f86 MK |
1541 | retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); |
1542 | if (retval < 0) { | |
1543 | goto out; | |
1544 | } | |
1545 | retval += offset; | |
c572f23a HPB |
1546 | trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, |
1547 | v9stat_dotl.st_mode, v9stat_dotl.st_uid, | |
1548 | v9stat_dotl.st_gid); | |
7999f7e1 AK |
1549 | out: |
1550 | put_fid(pdu, fidp); | |
1551 | out_nofid: | |
dc295f83 | 1552 | pdu_complete(pdu, retval); |
00ede4c2 SK |
1553 | } |
1554 | ||
e4027caf AK |
1555 | /* Attribute flags */ |
1556 | #define P9_ATTR_MODE (1 << 0) | |
1557 | #define P9_ATTR_UID (1 << 1) | |
1558 | #define P9_ATTR_GID (1 << 2) | |
1559 | #define P9_ATTR_SIZE (1 << 3) | |
1560 | #define P9_ATTR_ATIME (1 << 4) | |
1561 | #define P9_ATTR_MTIME (1 << 5) | |
1562 | #define P9_ATTR_CTIME (1 << 6) | |
1563 | #define P9_ATTR_ATIME_SET (1 << 7) | |
1564 | #define P9_ATTR_MTIME_SET (1 << 8) | |
1565 | ||
1566 | #define P9_ATTR_MASK 127 | |
c79ce737 | 1567 | |
8440e22e | 1568 | static void coroutine_fn v9fs_setattr(void *opaque) |
c79ce737 | 1569 | { |
65c05f9a AK |
1570 | int err = 0; |
1571 | int32_t fid; | |
1572 | V9fsFidState *fidp; | |
1573 | size_t offset = 7; | |
1574 | V9fsIattr v9iattr; | |
1575 | V9fsPDU *pdu = opaque; | |
c79ce737 | 1576 | |
ddca7f86 MK |
1577 | err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); |
1578 | if (err < 0) { | |
1579 | goto out_nofid; | |
1580 | } | |
c79ce737 | 1581 | |
8f9c64bf GK |
1582 | trace_v9fs_setattr(pdu->tag, pdu->id, fid, |
1583 | v9iattr.valid, v9iattr.mode, v9iattr.uid, v9iattr.gid, | |
1584 | v9iattr.size, v9iattr.atime_sec, v9iattr.mtime_sec); | |
1585 | ||
bccacf6c | 1586 | fidp = get_fid(pdu, fid); |
65c05f9a AK |
1587 | if (fidp == NULL) { |
1588 | err = -EINVAL; | |
84dfb926 | 1589 | goto out_nofid; |
c79ce737 | 1590 | } |
e4027caf | 1591 | if (v9iattr.valid & P9_ATTR_MODE) { |
bccacf6c | 1592 | err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); |
65c05f9a AK |
1593 | if (err < 0) { |
1594 | goto out; | |
c79ce737 | 1595 | } |
c79ce737 | 1596 | } |
e4027caf | 1597 | if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { |
c79ce737 | 1598 | struct timespec times[2]; |
e4027caf AK |
1599 | if (v9iattr.valid & P9_ATTR_ATIME) { |
1600 | if (v9iattr.valid & P9_ATTR_ATIME_SET) { | |
65c05f9a AK |
1601 | times[0].tv_sec = v9iattr.atime_sec; |
1602 | times[0].tv_nsec = v9iattr.atime_nsec; | |
c79ce737 SK |
1603 | } else { |
1604 | times[0].tv_nsec = UTIME_NOW; | |
1605 | } | |
1606 | } else { | |
1607 | times[0].tv_nsec = UTIME_OMIT; | |
1608 | } | |
e4027caf AK |
1609 | if (v9iattr.valid & P9_ATTR_MTIME) { |
1610 | if (v9iattr.valid & P9_ATTR_MTIME_SET) { | |
65c05f9a AK |
1611 | times[1].tv_sec = v9iattr.mtime_sec; |
1612 | times[1].tv_nsec = v9iattr.mtime_nsec; | |
c79ce737 SK |
1613 | } else { |
1614 | times[1].tv_nsec = UTIME_NOW; | |
1615 | } | |
1616 | } else { | |
1617 | times[1].tv_nsec = UTIME_OMIT; | |
1618 | } | |
bccacf6c | 1619 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
65c05f9a AK |
1620 | if (err < 0) { |
1621 | goto out; | |
1622 | } | |
c79ce737 | 1623 | } |
65c05f9a AK |
1624 | /* |
1625 | * If the only valid entry in iattr is ctime we can call | |
1626 | * chown(-1,-1) to update the ctime of the file | |
1627 | */ | |
e4027caf AK |
1628 | if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || |
1629 | ((v9iattr.valid & P9_ATTR_CTIME) | |
1630 | && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { | |
1631 | if (!(v9iattr.valid & P9_ATTR_UID)) { | |
65c05f9a AK |
1632 | v9iattr.uid = -1; |
1633 | } | |
e4027caf | 1634 | if (!(v9iattr.valid & P9_ATTR_GID)) { |
65c05f9a AK |
1635 | v9iattr.gid = -1; |
1636 | } | |
bccacf6c | 1637 | err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, |
65c05f9a AK |
1638 | v9iattr.gid); |
1639 | if (err < 0) { | |
1640 | goto out; | |
1641 | } | |
c79ce737 | 1642 | } |
e4027caf | 1643 | if (v9iattr.valid & (P9_ATTR_SIZE)) { |
bccacf6c | 1644 | err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); |
65c05f9a AK |
1645 | if (err < 0) { |
1646 | goto out; | |
1647 | } | |
c79ce737 | 1648 | } |
65c05f9a | 1649 | err = offset; |
8f9c64bf | 1650 | trace_v9fs_setattr_return(pdu->tag, pdu->id); |
c79ce737 | 1651 | out: |
bccacf6c | 1652 | put_fid(pdu, fidp); |
84dfb926 | 1653 | out_nofid: |
dc295f83 | 1654 | pdu_complete(pdu, err); |
c79ce737 SK |
1655 | } |
1656 | ||
3cc19c0c | 1657 | static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) |
ff5e54c9 AL |
1658 | { |
1659 | int i; | |
ddca7f86 | 1660 | ssize_t err; |
3cc19c0c | 1661 | size_t offset = 7; |
ddca7f86 MK |
1662 | |
1663 | err = pdu_marshal(pdu, offset, "w", nwnames); | |
1664 | if (err < 0) { | |
1665 | return err; | |
1666 | } | |
1667 | offset += err; | |
3cc19c0c | 1668 | for (i = 0; i < nwnames; i++) { |
ddca7f86 MK |
1669 | err = pdu_marshal(pdu, offset, "Q", &qids[i]); |
1670 | if (err < 0) { | |
1671 | return err; | |
1672 | } | |
1673 | offset += err; | |
ff5e54c9 | 1674 | } |
3cc19c0c | 1675 | return offset; |
ff5e54c9 AL |
1676 | } |
1677 | ||
fff39a7a GK |
1678 | static bool name_is_illegal(const char *name) |
1679 | { | |
1680 | return !*name || strchr(name, '/') != NULL; | |
1681 | } | |
1682 | ||
56f101ec GK |
1683 | static bool not_same_qid(const V9fsQID *qid1, const V9fsQID *qid2) |
1684 | { | |
1685 | return | |
1686 | qid1->type != qid2->type || | |
1687 | qid1->version != qid2->version || | |
1688 | qid1->path != qid2->path; | |
1689 | } | |
1690 | ||
8440e22e | 1691 | static void coroutine_fn v9fs_walk(void *opaque) |
9f107513 | 1692 | { |
3cc19c0c AK |
1693 | int name_idx; |
1694 | V9fsQID *qids = NULL; | |
1695 | int i, err = 0; | |
2289be19 | 1696 | V9fsPath dpath, path; |
3cc19c0c AK |
1697 | uint16_t nwnames; |
1698 | struct stat stbuf; | |
1699 | size_t offset = 7; | |
1700 | int32_t fid, newfid; | |
1701 | V9fsString *wnames = NULL; | |
1702 | V9fsFidState *fidp; | |
3a93113a | 1703 | V9fsFidState *newfidp = NULL; |
ff06030f VJ |
1704 | V9fsPDU *pdu = opaque; |
1705 | V9fsState *s = pdu->s; | |
56f101ec | 1706 | V9fsQID qid; |
ff5e54c9 | 1707 | |
ddca7f86 MK |
1708 | err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); |
1709 | if (err < 0) { | |
dc295f83 | 1710 | pdu_complete(pdu, err); |
ddca7f86 MK |
1711 | return ; |
1712 | } | |
1713 | offset += err; | |
ff5e54c9 | 1714 | |
c572f23a HPB |
1715 | trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); |
1716 | ||
3cc19c0c | 1717 | if (nwnames && nwnames <= P9_MAXWELEM) { |
1923923b GK |
1718 | wnames = g_new0(V9fsString, nwnames); |
1719 | qids = g_new0(V9fsQID, nwnames); | |
3cc19c0c | 1720 | for (i = 0; i < nwnames; i++) { |
ddca7f86 MK |
1721 | err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); |
1722 | if (err < 0) { | |
1723 | goto out_nofid; | |
1724 | } | |
fff39a7a GK |
1725 | if (name_is_illegal(wnames[i].data)) { |
1726 | err = -ENOENT; | |
1727 | goto out_nofid; | |
1728 | } | |
ddca7f86 | 1729 | offset += err; |
ff5e54c9 | 1730 | } |
3cc19c0c | 1731 | } else if (nwnames > P9_MAXWELEM) { |
4f8dee2d | 1732 | err = -EINVAL; |
84dfb926 | 1733 | goto out_nofid; |
ff5e54c9 | 1734 | } |
bccacf6c | 1735 | fidp = get_fid(pdu, fid); |
3cc19c0c | 1736 | if (fidp == NULL) { |
ff5e54c9 | 1737 | err = -ENOENT; |
84dfb926 | 1738 | goto out_nofid; |
ff5e54c9 | 1739 | } |
56f101ec | 1740 | |
13fd08e6 GK |
1741 | v9fs_path_init(&dpath); |
1742 | v9fs_path_init(&path); | |
1743 | ||
56f101ec GK |
1744 | err = fid_to_qid(pdu, fidp, &qid); |
1745 | if (err < 0) { | |
1746 | goto out; | |
1747 | } | |
1748 | ||
2289be19 AK |
1749 | /* |
1750 | * Both dpath and path initially poin to fidp. | |
1751 | * Needed to handle request with nwnames == 0 | |
1752 | */ | |
1753 | v9fs_path_copy(&dpath, &fidp->path); | |
1754 | v9fs_path_copy(&path, &fidp->path); | |
1755 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
56f101ec GK |
1756 | if (not_same_qid(&pdu->s->root_qid, &qid) || |
1757 | strcmp("..", wnames[name_idx].data)) { | |
1758 | err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, | |
1759 | &path); | |
1760 | if (err < 0) { | |
1761 | goto out; | |
1762 | } | |
1763 | ||
1764 | err = v9fs_co_lstat(pdu, &path, &stbuf); | |
1765 | if (err < 0) { | |
1766 | goto out; | |
1767 | } | |
3b5ee9e8 AM |
1768 | err = stat_to_qid(pdu, &stbuf, &qid); |
1769 | if (err < 0) { | |
1770 | goto out; | |
1771 | } | |
56f101ec | 1772 | v9fs_path_copy(&dpath, &path); |
2289be19 | 1773 | } |
56f101ec | 1774 | memcpy(&qids[name_idx], &qid, sizeof(qid)); |
2289be19 | 1775 | } |
ff5e54c9 | 1776 | if (fid == newfid) { |
49dd946b GK |
1777 | if (fidp->fid_type != P9_FID_NONE) { |
1778 | err = -EINVAL; | |
1779 | goto out; | |
1780 | } | |
5b3c77aa | 1781 | v9fs_path_write_lock(s); |
2289be19 | 1782 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 1783 | v9fs_path_unlock(s); |
ff5e54c9 | 1784 | } else { |
3cc19c0c AK |
1785 | newfidp = alloc_fid(s, newfid); |
1786 | if (newfidp == NULL) { | |
ff5e54c9 AL |
1787 | err = -EINVAL; |
1788 | goto out; | |
1789 | } | |
3cc19c0c | 1790 | newfidp->uid = fidp->uid; |
2289be19 | 1791 | v9fs_path_copy(&newfidp->path, &path); |
9f107513 | 1792 | } |
3cc19c0c | 1793 | err = v9fs_walk_marshal(pdu, nwnames, qids); |
7999f7e1 | 1794 | trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); |
ff5e54c9 | 1795 | out: |
bccacf6c | 1796 | put_fid(pdu, fidp); |
84dfb926 | 1797 | if (newfidp) { |
bccacf6c | 1798 | put_fid(pdu, newfidp); |
84dfb926 | 1799 | } |
2289be19 AK |
1800 | v9fs_path_free(&dpath); |
1801 | v9fs_path_free(&path); | |
84dfb926 | 1802 | out_nofid: |
dc295f83 | 1803 | pdu_complete(pdu, err); |
3cc19c0c AK |
1804 | if (nwnames && nwnames <= P9_MAXWELEM) { |
1805 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
1806 | v9fs_string_free(&wnames[name_idx]); | |
1807 | } | |
1808 | g_free(wnames); | |
1809 | g_free(qids); | |
1810 | } | |
9f107513 AL |
1811 | } |
1812 | ||
8440e22e | 1813 | static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) |
5e94c103 MK |
1814 | { |
1815 | struct statfs stbuf; | |
1816 | int32_t iounit = 0; | |
bccacf6c | 1817 | V9fsState *s = pdu->s; |
5e94c103 MK |
1818 | |
1819 | /* | |
1820 | * iounit should be multiples of f_bsize (host filesystem block size | |
1821 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1822 | */ | |
bccacf6c | 1823 | if (!v9fs_co_statfs(pdu, path, &stbuf)) { |
68d654da DS |
1824 | if (stbuf.f_bsize) { |
1825 | iounit = stbuf.f_bsize; | |
1826 | iounit *= (s->msize - P9_IOHDRSZ) / stbuf.f_bsize; | |
1827 | } | |
5e94c103 | 1828 | } |
5e94c103 MK |
1829 | if (!iounit) { |
1830 | iounit = s->msize - P9_IOHDRSZ; | |
1831 | } | |
1832 | return iounit; | |
1833 | } | |
1834 | ||
8440e22e | 1835 | static void coroutine_fn v9fs_open(void *opaque) |
5e94c103 | 1836 | { |
857bc158 | 1837 | int flags; |
857bc158 AK |
1838 | int32_t fid; |
1839 | int32_t mode; | |
1840 | V9fsQID qid; | |
7999f7e1 | 1841 | int iounit = 0; |
857bc158 AK |
1842 | ssize_t err = 0; |
1843 | size_t offset = 7; | |
1844 | struct stat stbuf; | |
1845 | V9fsFidState *fidp; | |
1846 | V9fsPDU *pdu = opaque; | |
1847 | V9fsState *s = pdu->s; | |
5e94c103 | 1848 | |
857bc158 | 1849 | if (s->proto_version == V9FS_PROTO_2000L) { |
ddca7f86 | 1850 | err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); |
857bc158 | 1851 | } else { |
67d6fa53 BH |
1852 | uint8_t modebyte; |
1853 | err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); | |
1854 | mode = modebyte; | |
ddca7f86 MK |
1855 | } |
1856 | if (err < 0) { | |
1857 | goto out_nofid; | |
857bc158 | 1858 | } |
c572f23a HPB |
1859 | trace_v9fs_open(pdu->tag, pdu->id, fid, mode); |
1860 | ||
bccacf6c | 1861 | fidp = get_fid(pdu, fid); |
857bc158 AK |
1862 | if (fidp == NULL) { |
1863 | err = -ENOENT; | |
84dfb926 | 1864 | goto out_nofid; |
a6568fe2 | 1865 | } |
49dd946b GK |
1866 | if (fidp->fid_type != P9_FID_NONE) { |
1867 | err = -EINVAL; | |
1868 | goto out; | |
1869 | } | |
a6568fe2 | 1870 | |
bccacf6c | 1871 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
857bc158 | 1872 | if (err < 0) { |
a6568fe2 AL |
1873 | goto out; |
1874 | } | |
3b5ee9e8 AM |
1875 | err = stat_to_qid(pdu, &stbuf, &qid); |
1876 | if (err < 0) { | |
1877 | goto out; | |
1878 | } | |
857bc158 | 1879 | if (S_ISDIR(stbuf.st_mode)) { |
bccacf6c | 1880 | err = v9fs_co_opendir(pdu, fidp); |
857bc158 AK |
1881 | if (err < 0) { |
1882 | goto out; | |
1883 | } | |
1884 | fidp->fid_type = P9_FID_DIR; | |
ddca7f86 MK |
1885 | err = pdu_marshal(pdu, offset, "Qd", &qid, 0); |
1886 | if (err < 0) { | |
1887 | goto out; | |
1888 | } | |
1889 | err += offset; | |
a6568fe2 | 1890 | } else { |
771e9d4c | 1891 | if (s->proto_version == V9FS_PROTO_2000L) { |
d3ab98e6 | 1892 | flags = get_dotl_openflags(s, mode); |
771e9d4c | 1893 | } else { |
857bc158 | 1894 | flags = omode_to_uflags(mode); |
771e9d4c | 1895 | } |
2c74c2cb MK |
1896 | if (is_ro_export(&s->ctx)) { |
1897 | if (mode & O_WRONLY || mode & O_RDWR || | |
1898 | mode & O_APPEND || mode & O_TRUNC) { | |
1899 | err = -EROFS; | |
1900 | goto out; | |
1901 | } | |
2c74c2cb | 1902 | } |
bccacf6c | 1903 | err = v9fs_co_open(pdu, fidp, flags); |
857bc158 AK |
1904 | if (err < 0) { |
1905 | goto out; | |
1906 | } | |
1907 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
1908 | fidp->open_flags = flags; |
1909 | if (flags & O_EXCL) { | |
1910 | /* | |
1911 | * We let the host file system do O_EXCL check | |
1912 | * We should not reclaim such fd | |
1913 | */ | |
1914 | fidp->flags |= FID_NON_RECLAIMABLE; | |
1915 | } | |
bccacf6c | 1916 | iounit = get_iounit(pdu, &fidp->path); |
ddca7f86 MK |
1917 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
1918 | if (err < 0) { | |
1919 | goto out; | |
1920 | } | |
1921 | err += offset; | |
a6568fe2 | 1922 | } |
7999f7e1 AK |
1923 | trace_v9fs_open_return(pdu->tag, pdu->id, |
1924 | qid.type, qid.version, qid.path, iounit); | |
a6568fe2 | 1925 | out: |
bccacf6c | 1926 | put_fid(pdu, fidp); |
84dfb926 | 1927 | out_nofid: |
dc295f83 | 1928 | pdu_complete(pdu, err); |
a6568fe2 AL |
1929 | } |
1930 | ||
8440e22e | 1931 | static void coroutine_fn v9fs_lcreate(void *opaque) |
c1568af5 VJ |
1932 | { |
1933 | int32_t dfid, flags, mode; | |
1934 | gid_t gid; | |
c1568af5 | 1935 | ssize_t err = 0; |
36f8981f | 1936 | ssize_t offset = 7; |
36f8981f VJ |
1937 | V9fsString name; |
1938 | V9fsFidState *fidp; | |
1939 | struct stat stbuf; | |
1940 | V9fsQID qid; | |
1941 | int32_t iounit; | |
1942 | V9fsPDU *pdu = opaque; | |
c1568af5 | 1943 | |
ddca7f86 MK |
1944 | v9fs_string_init(&name); |
1945 | err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, | |
1946 | &name, &flags, &mode, &gid); | |
1947 | if (err < 0) { | |
1948 | goto out_nofid; | |
1949 | } | |
c572f23a | 1950 | trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); |
c1568af5 | 1951 | |
fff39a7a GK |
1952 | if (name_is_illegal(name.data)) { |
1953 | err = -ENOENT; | |
1954 | goto out_nofid; | |
1955 | } | |
1956 | ||
805b5d98 GK |
1957 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
1958 | err = -EEXIST; | |
1959 | goto out_nofid; | |
1960 | } | |
1961 | ||
bccacf6c | 1962 | fidp = get_fid(pdu, dfid); |
36f8981f | 1963 | if (fidp == NULL) { |
c1568af5 | 1964 | err = -ENOENT; |
84dfb926 | 1965 | goto out_nofid; |
c1568af5 | 1966 | } |
d63fb193 LQ |
1967 | if (fidp->fid_type != P9_FID_NONE) { |
1968 | err = -EINVAL; | |
1969 | goto out; | |
1970 | } | |
c1568af5 | 1971 | |
d3ab98e6 | 1972 | flags = get_dotl_openflags(pdu->s, flags); |
bccacf6c | 1973 | err = v9fs_co_open2(pdu, fidp, &name, gid, |
02cb7f3a | 1974 | flags | O_CREAT, mode, &stbuf); |
36f8981f VJ |
1975 | if (err < 0) { |
1976 | goto out; | |
1977 | } | |
1978 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
1979 | fidp->open_flags = flags; |
1980 | if (flags & O_EXCL) { | |
1981 | /* | |
1982 | * We let the host file system do O_EXCL check | |
1983 | * We should not reclaim such fd | |
1984 | */ | |
1985 | fidp->flags |= FID_NON_RECLAIMABLE; | |
1986 | } | |
bccacf6c | 1987 | iounit = get_iounit(pdu, &fidp->path); |
3b5ee9e8 AM |
1988 | err = stat_to_qid(pdu, &stbuf, &qid); |
1989 | if (err < 0) { | |
1990 | goto out; | |
1991 | } | |
ddca7f86 MK |
1992 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
1993 | if (err < 0) { | |
1994 | goto out; | |
1995 | } | |
1996 | err += offset; | |
7999f7e1 AK |
1997 | trace_v9fs_lcreate_return(pdu->tag, pdu->id, |
1998 | qid.type, qid.version, qid.path, iounit); | |
c1568af5 | 1999 | out: |
bccacf6c | 2000 | put_fid(pdu, fidp); |
84dfb926 | 2001 | out_nofid: |
dc295f83 | 2002 | pdu_complete(pdu, err); |
36f8981f | 2003 | v9fs_string_free(&name); |
c1568af5 VJ |
2004 | } |
2005 | ||
a1bf8b74 | 2006 | static void coroutine_fn v9fs_fsync(void *opaque) |
b41e95d3 | 2007 | { |
4e9ad444 | 2008 | int err; |
b41e95d3 | 2009 | int32_t fid; |
4e9ad444 | 2010 | int datasync; |
b41e95d3 VJ |
2011 | size_t offset = 7; |
2012 | V9fsFidState *fidp; | |
4e9ad444 | 2013 | V9fsPDU *pdu = opaque; |
b41e95d3 | 2014 | |
ddca7f86 MK |
2015 | err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); |
2016 | if (err < 0) { | |
2017 | goto out_nofid; | |
2018 | } | |
c572f23a HPB |
2019 | trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); |
2020 | ||
bccacf6c | 2021 | fidp = get_fid(pdu, fid); |
b41e95d3 VJ |
2022 | if (fidp == NULL) { |
2023 | err = -ENOENT; | |
84dfb926 | 2024 | goto out_nofid; |
b41e95d3 | 2025 | } |
bccacf6c | 2026 | err = v9fs_co_fsync(pdu, fidp, datasync); |
4e9ad444 AK |
2027 | if (!err) { |
2028 | err = offset; | |
2029 | } | |
bccacf6c | 2030 | put_fid(pdu, fidp); |
84dfb926 | 2031 | out_nofid: |
dc295f83 | 2032 | pdu_complete(pdu, err); |
b41e95d3 VJ |
2033 | } |
2034 | ||
8440e22e | 2035 | static void coroutine_fn v9fs_clunk(void *opaque) |
a6568fe2 | 2036 | { |
c540ee51 | 2037 | int err; |
bbd5697b AL |
2038 | int32_t fid; |
2039 | size_t offset = 7; | |
84dfb926 | 2040 | V9fsFidState *fidp; |
c540ee51 AK |
2041 | V9fsPDU *pdu = opaque; |
2042 | V9fsState *s = pdu->s; | |
bbd5697b | 2043 | |
ddca7f86 MK |
2044 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
2045 | if (err < 0) { | |
2046 | goto out_nofid; | |
2047 | } | |
c572f23a | 2048 | trace_v9fs_clunk(pdu->tag, pdu->id, fid); |
84dfb926 | 2049 | |
ce421a19 | 2050 | fidp = clunk_fid(s, fid); |
84dfb926 AK |
2051 | if (fidp == NULL) { |
2052 | err = -ENOENT; | |
2053 | goto out_nofid; | |
2054 | } | |
ce421a19 AK |
2055 | /* |
2056 | * Bump the ref so that put_fid will | |
2057 | * free the fid. | |
2058 | */ | |
2059 | fidp->ref++; | |
a911a182 AK |
2060 | err = put_fid(pdu, fidp); |
2061 | if (!err) { | |
2062 | err = offset; | |
2063 | } | |
84dfb926 | 2064 | out_nofid: |
dc295f83 | 2065 | pdu_complete(pdu, err); |
9f107513 AL |
2066 | } |
2067 | ||
bcb8998f SS |
2068 | /* |
2069 | * Create a QEMUIOVector for a sub-region of PDU iovecs | |
2070 | * | |
2071 | * @qiov: uninitialized QEMUIOVector | |
2072 | * @skip: number of bytes to skip from beginning of PDU | |
2073 | * @size: number of bytes to include | |
2074 | * @is_write: true - write, false - read | |
2075 | * | |
2076 | * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up | |
2077 | * with qemu_iovec_destroy(). | |
2078 | */ | |
2079 | static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, | |
cf45183b | 2080 | size_t skip, size_t size, |
bcb8998f SS |
2081 | bool is_write) |
2082 | { | |
2083 | QEMUIOVector elem; | |
2084 | struct iovec *iov; | |
2085 | unsigned int niov; | |
2086 | ||
88da0b03 | 2087 | if (is_write) { |
cf45183b | 2088 | pdu->s->transport->init_out_iov_from_pdu(pdu, &iov, &niov, size + skip); |
88da0b03 | 2089 | } else { |
cf45183b | 2090 | pdu->s->transport->init_in_iov_from_pdu(pdu, &iov, &niov, size + skip); |
88da0b03 | 2091 | } |
bcb8998f SS |
2092 | |
2093 | qemu_iovec_init_external(&elem, iov, niov); | |
2094 | qemu_iovec_init(qiov, niov); | |
cf45183b | 2095 | qemu_iovec_concat(qiov, &elem, skip, size); |
bcb8998f SS |
2096 | } |
2097 | ||
2f008a8c AK |
2098 | static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
2099 | uint64_t off, uint32_t max_count) | |
a9231555 | 2100 | { |
ddca7f86 | 2101 | ssize_t err; |
d208a0e0 | 2102 | size_t offset = 7; |
cf45183b | 2103 | uint64_t read_count; |
bcb8998f | 2104 | QEMUIOVector qiov_full; |
a9231555 | 2105 | |
7e55d65c LQ |
2106 | if (fidp->fs.xattr.len < off) { |
2107 | read_count = 0; | |
16724a17 | 2108 | } else { |
cf45183b SS |
2109 | read_count = fidp->fs.xattr.len - off; |
2110 | } | |
2111 | if (read_count > max_count) { | |
d208a0e0 | 2112 | read_count = max_count; |
a9231555 | 2113 | } |
ddca7f86 MK |
2114 | err = pdu_marshal(pdu, offset, "d", read_count); |
2115 | if (err < 0) { | |
2116 | return err; | |
2117 | } | |
2118 | offset += err; | |
00588a0a | 2119 | |
cf45183b | 2120 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, read_count, false); |
fa0eb5c5 | 2121 | err = v9fs_pack(qiov_full.iov, qiov_full.niov, 0, |
ddca7f86 MK |
2122 | ((char *)fidp->fs.xattr.value) + off, |
2123 | read_count); | |
bcb8998f | 2124 | qemu_iovec_destroy(&qiov_full); |
ddca7f86 MK |
2125 | if (err < 0) { |
2126 | return err; | |
2127 | } | |
2128 | offset += err; | |
d208a0e0 | 2129 | return offset; |
a9231555 AL |
2130 | } |
2131 | ||
8440e22e GK |
2132 | static int coroutine_fn v9fs_do_readdir_with_stat(V9fsPDU *pdu, |
2133 | V9fsFidState *fidp, | |
2134 | uint32_t max_count) | |
a9231555 | 2135 | { |
2289be19 | 2136 | V9fsPath path; |
d208a0e0 AK |
2137 | V9fsStat v9stat; |
2138 | int len, err = 0; | |
2139 | int32_t count = 0; | |
2140 | struct stat stbuf; | |
2141 | off_t saved_dir_pos; | |
635324e8 | 2142 | struct dirent *dent; |
a9231555 | 2143 | |
d208a0e0 | 2144 | /* save the directory position */ |
bccacf6c | 2145 | saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
d208a0e0 AK |
2146 | if (saved_dir_pos < 0) { |
2147 | return saved_dir_pos; | |
a9231555 | 2148 | } |
5f524c1e | 2149 | |
d208a0e0 | 2150 | while (1) { |
2289be19 | 2151 | v9fs_path_init(&path); |
7cde47d4 GK |
2152 | |
2153 | v9fs_readdir_lock(&fidp->fs.dir); | |
2154 | ||
635324e8 GK |
2155 | err = v9fs_co_readdir(pdu, fidp, &dent); |
2156 | if (err || !dent) { | |
d208a0e0 AK |
2157 | break; |
2158 | } | |
bccacf6c | 2159 | err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); |
d208a0e0 | 2160 | if (err < 0) { |
8762a46d | 2161 | break; |
d208a0e0 | 2162 | } |
bccacf6c | 2163 | err = v9fs_co_lstat(pdu, &path, &stbuf); |
2289be19 | 2164 | if (err < 0) { |
8762a46d | 2165 | break; |
2289be19 | 2166 | } |
6069537f | 2167 | err = stat_to_v9stat(pdu, &path, dent->d_name, &stbuf, &v9stat); |
d208a0e0 | 2168 | if (err < 0) { |
8762a46d | 2169 | break; |
a9231555 | 2170 | } |
772a7369 JD |
2171 | if ((count + v9stat.size + 2) > max_count) { |
2172 | v9fs_readdir_unlock(&fidp->fs.dir); | |
2173 | ||
2174 | /* Ran out of buffer. Set dir back to old position and return */ | |
2175 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); | |
2176 | v9fs_stat_free(&v9stat); | |
2177 | v9fs_path_free(&path); | |
2178 | return count; | |
2179 | } | |
2180 | ||
d208a0e0 AK |
2181 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
2182 | len = pdu_marshal(pdu, 11 + count, "S", &v9stat); | |
7cde47d4 GK |
2183 | |
2184 | v9fs_readdir_unlock(&fidp->fs.dir); | |
2185 | ||
772a7369 | 2186 | if (len < 0) { |
bccacf6c | 2187 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
d208a0e0 | 2188 | v9fs_stat_free(&v9stat); |
2289be19 | 2189 | v9fs_path_free(&path); |
772a7369 | 2190 | return len; |
d208a0e0 AK |
2191 | } |
2192 | count += len; | |
2193 | v9fs_stat_free(&v9stat); | |
2289be19 | 2194 | v9fs_path_free(&path); |
d208a0e0 | 2195 | saved_dir_pos = dent->d_off; |
a9231555 | 2196 | } |
8762a46d | 2197 | |
7cde47d4 GK |
2198 | v9fs_readdir_unlock(&fidp->fs.dir); |
2199 | ||
2289be19 | 2200 | v9fs_path_free(&path); |
d208a0e0 AK |
2201 | if (err < 0) { |
2202 | return err; | |
fa32ef88 | 2203 | } |
d208a0e0 | 2204 | return count; |
fa32ef88 AK |
2205 | } |
2206 | ||
8440e22e | 2207 | static void coroutine_fn v9fs_read(void *opaque) |
9f107513 | 2208 | { |
a9231555 | 2209 | int32_t fid; |
2f008a8c | 2210 | uint64_t off; |
a9231555 | 2211 | ssize_t err = 0; |
d208a0e0 AK |
2212 | int32_t count = 0; |
2213 | size_t offset = 7; | |
2f008a8c | 2214 | uint32_t max_count; |
d208a0e0 AK |
2215 | V9fsFidState *fidp; |
2216 | V9fsPDU *pdu = opaque; | |
2217 | V9fsState *s = pdu->s; | |
a9231555 | 2218 | |
ddca7f86 MK |
2219 | err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); |
2220 | if (err < 0) { | |
2221 | goto out_nofid; | |
2222 | } | |
c572f23a | 2223 | trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); |
84dfb926 | 2224 | |
bccacf6c | 2225 | fidp = get_fid(pdu, fid); |
d208a0e0 | 2226 | if (fidp == NULL) { |
a9231555 | 2227 | err = -EINVAL; |
84dfb926 | 2228 | goto out_nofid; |
a9231555 | 2229 | } |
d208a0e0 | 2230 | if (fidp->fid_type == P9_FID_DIR) { |
a9231555 | 2231 | |
d208a0e0 | 2232 | if (off == 0) { |
bccacf6c | 2233 | v9fs_co_rewinddir(pdu, fidp); |
a9231555 | 2234 | } |
bccacf6c | 2235 | count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); |
d208a0e0 AK |
2236 | if (count < 0) { |
2237 | err = count; | |
2238 | goto out; | |
56d15a53 | 2239 | } |
ddca7f86 MK |
2240 | err = pdu_marshal(pdu, offset, "d", count); |
2241 | if (err < 0) { | |
2242 | goto out; | |
2243 | } | |
2244 | err += offset + count; | |
d208a0e0 | 2245 | } else if (fidp->fid_type == P9_FID_FILE) { |
302a0d3e SH |
2246 | QEMUIOVector qiov_full; |
2247 | QEMUIOVector qiov; | |
d208a0e0 | 2248 | int32_t len; |
d208a0e0 | 2249 | |
cf45183b | 2250 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); |
302a0d3e | 2251 | qemu_iovec_init(&qiov, qiov_full.niov); |
d208a0e0 | 2252 | do { |
302a0d3e | 2253 | qemu_iovec_reset(&qiov); |
1b093c48 | 2254 | qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); |
d208a0e0 | 2255 | if (0) { |
302a0d3e | 2256 | print_sg(qiov.iov, qiov.niov); |
d208a0e0 AK |
2257 | } |
2258 | /* Loop in case of EINTR */ | |
2259 | do { | |
302a0d3e | 2260 | len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); |
d208a0e0 AK |
2261 | if (len >= 0) { |
2262 | off += len; | |
2263 | count += len; | |
2264 | } | |
bccacf6c | 2265 | } while (len == -EINTR && !pdu->cancelled); |
d208a0e0 AK |
2266 | if (len < 0) { |
2267 | /* IO error return the error */ | |
2268 | err = len; | |
e95c9a49 | 2269 | goto out_free_iovec; |
d208a0e0 | 2270 | } |
d208a0e0 | 2271 | } while (count < max_count && len > 0); |
ddca7f86 MK |
2272 | err = pdu_marshal(pdu, offset, "d", count); |
2273 | if (err < 0) { | |
e95c9a49 | 2274 | goto out_free_iovec; |
ddca7f86 MK |
2275 | } |
2276 | err += offset + count; | |
e95c9a49 | 2277 | out_free_iovec: |
302a0d3e SH |
2278 | qemu_iovec_destroy(&qiov); |
2279 | qemu_iovec_destroy(&qiov_full); | |
d208a0e0 AK |
2280 | } else if (fidp->fid_type == P9_FID_XATTR) { |
2281 | err = v9fs_xattr_read(s, pdu, fidp, off, max_count); | |
a9231555 AL |
2282 | } else { |
2283 | err = -EINVAL; | |
9f107513 | 2284 | } |
7999f7e1 | 2285 | trace_v9fs_read_return(pdu->tag, pdu->id, count, err); |
a9231555 | 2286 | out: |
bccacf6c | 2287 | put_fid(pdu, fidp); |
84dfb926 | 2288 | out_nofid: |
dc295f83 | 2289 | pdu_complete(pdu, err); |
9f107513 AL |
2290 | } |
2291 | ||
29c9d2ca CS |
2292 | /** |
2293 | * Returns size required in Rreaddir response for the passed dirent @p name. | |
2294 | * | |
2295 | * @param name - directory entry's name (i.e. file name, directory name) | |
2296 | * @returns required size in bytes | |
2297 | */ | |
2298 | size_t v9fs_readdir_response_size(V9fsString *name) | |
c18e2f94 | 2299 | { |
5e4eaa79 AK |
2300 | /* |
2301 | * Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
2302 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
2303 | */ | |
2304 | return 24 + v9fs_string_size(name); | |
c18e2f94 SK |
2305 | } |
2306 | ||
0c4356ba CS |
2307 | static void v9fs_free_dirents(struct V9fsDirEnt *e) |
2308 | { | |
2309 | struct V9fsDirEnt *next = NULL; | |
2310 | ||
2311 | for (; e; e = next) { | |
2312 | next = e->next; | |
2313 | g_free(e->dent); | |
2314 | g_free(e->st); | |
2315 | g_free(e); | |
2316 | } | |
2317 | } | |
2318 | ||
8440e22e | 2319 | static int coroutine_fn v9fs_do_readdir(V9fsPDU *pdu, V9fsFidState *fidp, |
0c4356ba | 2320 | off_t offset, int32_t max_count) |
c18e2f94 | 2321 | { |
c18e2f94 | 2322 | size_t size; |
5e4eaa79 AK |
2323 | V9fsQID qid; |
2324 | V9fsString name; | |
2325 | int len, err = 0; | |
2326 | int32_t count = 0; | |
635324e8 | 2327 | struct dirent *dent; |
0c4356ba CS |
2328 | struct stat *st; |
2329 | struct V9fsDirEnt *entries = NULL; | |
c18e2f94 | 2330 | |
0c4356ba CS |
2331 | /* |
2332 | * inode remapping requires the device id, which in turn might be | |
2333 | * different for different directory entries, so if inode remapping is | |
2334 | * enabled we have to make a full stat for each directory entry | |
2335 | */ | |
2336 | const bool dostat = pdu->s->ctx.export_flags & V9FS_REMAP_INODES; | |
7cde47d4 | 2337 | |
0c4356ba CS |
2338 | /* |
2339 | * Fetch all required directory entries altogether on a background IO | |
2340 | * thread from fs driver. We don't want to do that for each entry | |
2341 | * individually, because hopping between threads (this main IO thread | |
2342 | * and background IO driver thread) would sum up to huge latencies. | |
2343 | */ | |
2344 | count = v9fs_co_readdir_many(pdu, fidp, &entries, offset, max_count, | |
2345 | dostat); | |
2346 | if (count < 0) { | |
2347 | err = count; | |
2348 | count = 0; | |
2349 | goto out; | |
2350 | } | |
2351 | count = 0; | |
7cde47d4 | 2352 | |
0c4356ba CS |
2353 | for (struct V9fsDirEnt *e = entries; e; e = e->next) { |
2354 | dent = e->dent; | |
1a6ed33c AM |
2355 | |
2356 | if (pdu->s->ctx.export_flags & V9FS_REMAP_INODES) { | |
0c4356ba CS |
2357 | st = e->st; |
2358 | /* e->st should never be NULL, but just to be sure */ | |
2359 | if (!st) { | |
2360 | err = -1; | |
2361 | break; | |
2362 | } | |
2363 | ||
2364 | /* remap inode */ | |
2365 | err = stat_to_qid(pdu, st, &qid); | |
1a6ed33c | 2366 | if (err < 0) { |
0c4356ba | 2367 | break; |
1a6ed33c AM |
2368 | } |
2369 | } else { | |
2370 | /* | |
2371 | * Fill up just the path field of qid because the client uses | |
2372 | * only that. To fill the entire qid structure we will have | |
2373 | * to stat each dirent found, which is expensive. For the | |
0c4356ba | 2374 | * latter reason we don't call stat_to_qid() here. Only drawback |
1a6ed33c AM |
2375 | * is that no multi-device export detection of stat_to_qid() |
2376 | * would be done and provided as error to the user here. But | |
2377 | * user would get that error anyway when accessing those | |
2378 | * files/dirs through other ways. | |
2379 | */ | |
2380 | size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); | |
2381 | memcpy(&qid.path, &dent->d_ino, size); | |
2382 | /* Fill the other fields with dummy values */ | |
2383 | qid.type = 0; | |
2384 | qid.version = 0; | |
2385 | } | |
c18e2f94 | 2386 | |
0c4356ba CS |
2387 | v9fs_string_init(&name); |
2388 | v9fs_string_sprintf(&name, "%s", dent->d_name); | |
2389 | ||
5e4eaa79 AK |
2390 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
2391 | len = pdu_marshal(pdu, 11 + count, "Qqbs", | |
2392 | &qid, dent->d_off, | |
2393 | dent->d_type, &name); | |
7cde47d4 | 2394 | |
0c4356ba | 2395 | v9fs_string_free(&name); |
7cde47d4 | 2396 | |
ddca7f86 | 2397 | if (len < 0) { |
0c4356ba CS |
2398 | err = len; |
2399 | break; | |
ddca7f86 | 2400 | } |
0c4356ba | 2401 | |
5e4eaa79 | 2402 | count += len; |
5e4eaa79 | 2403 | } |
7cde47d4 | 2404 | |
0c4356ba CS |
2405 | out: |
2406 | v9fs_free_dirents(entries); | |
5e4eaa79 AK |
2407 | if (err < 0) { |
2408 | return err; | |
2409 | } | |
2410 | return count; | |
c18e2f94 SK |
2411 | } |
2412 | ||
8440e22e | 2413 | static void coroutine_fn v9fs_readdir(void *opaque) |
c18e2f94 SK |
2414 | { |
2415 | int32_t fid; | |
5e4eaa79 AK |
2416 | V9fsFidState *fidp; |
2417 | ssize_t retval = 0; | |
c18e2f94 | 2418 | size_t offset = 7; |
2f008a8c AK |
2419 | uint64_t initial_offset; |
2420 | int32_t count; | |
2421 | uint32_t max_count; | |
5e4eaa79 | 2422 | V9fsPDU *pdu = opaque; |
d36a5c22 | 2423 | V9fsState *s = pdu->s; |
c18e2f94 | 2424 | |
ddca7f86 MK |
2425 | retval = pdu_unmarshal(pdu, offset, "dqd", &fid, |
2426 | &initial_offset, &max_count); | |
2427 | if (retval < 0) { | |
2428 | goto out_nofid; | |
2429 | } | |
c572f23a HPB |
2430 | trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); |
2431 | ||
d36a5c22 CS |
2432 | /* Enough space for a R_readdir header: size[4] Rreaddir tag[2] count[4] */ |
2433 | if (max_count > s->msize - 11) { | |
2434 | max_count = s->msize - 11; | |
2435 | warn_report_once( | |
2436 | "9p: bad client: T_readdir with count > msize - 11" | |
2437 | ); | |
2438 | } | |
2439 | ||
bccacf6c | 2440 | fidp = get_fid(pdu, fid); |
84dfb926 AK |
2441 | if (fidp == NULL) { |
2442 | retval = -EINVAL; | |
2443 | goto out_nofid; | |
2444 | } | |
f314ea4e | 2445 | if (!fidp->fs.dir.stream) { |
5e4eaa79 | 2446 | retval = -EINVAL; |
c18e2f94 SK |
2447 | goto out; |
2448 | } | |
0c4356ba | 2449 | count = v9fs_do_readdir(pdu, fidp, (off_t) initial_offset, max_count); |
5e4eaa79 AK |
2450 | if (count < 0) { |
2451 | retval = count; | |
2452 | goto out; | |
2453 | } | |
ddca7f86 MK |
2454 | retval = pdu_marshal(pdu, offset, "d", count); |
2455 | if (retval < 0) { | |
2456 | goto out; | |
2457 | } | |
2458 | retval += count + offset; | |
7999f7e1 | 2459 | trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); |
c18e2f94 | 2460 | out: |
bccacf6c | 2461 | put_fid(pdu, fidp); |
84dfb926 | 2462 | out_nofid: |
dc295f83 | 2463 | pdu_complete(pdu, retval); |
c18e2f94 SK |
2464 | } |
2465 | ||
d7a90491 | 2466 | static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
2f008a8c | 2467 | uint64_t off, uint32_t count, |
d7a90491 | 2468 | struct iovec *sg, int cnt) |
10b468bd AK |
2469 | { |
2470 | int i, to_copy; | |
2471 | ssize_t err = 0; | |
7e55d65c | 2472 | uint64_t write_count; |
d7a90491 | 2473 | size_t offset = 7; |
10b468bd | 2474 | |
d7a90491 | 2475 | |
7e55d65c | 2476 | if (fidp->fs.xattr.len < off) { |
b858e80a | 2477 | return -ENOSPC; |
10b468bd | 2478 | } |
7e55d65c LQ |
2479 | write_count = fidp->fs.xattr.len - off; |
2480 | if (write_count > count) { | |
2481 | write_count = count; | |
2482 | } | |
ddca7f86 MK |
2483 | err = pdu_marshal(pdu, offset, "d", write_count); |
2484 | if (err < 0) { | |
2485 | return err; | |
2486 | } | |
2487 | err += offset; | |
d7a90491 | 2488 | fidp->fs.xattr.copied_len += write_count; |
10b468bd AK |
2489 | /* |
2490 | * Now copy the content from sg list | |
2491 | */ | |
d7a90491 AK |
2492 | for (i = 0; i < cnt; i++) { |
2493 | if (write_count > sg[i].iov_len) { | |
2494 | to_copy = sg[i].iov_len; | |
10b468bd AK |
2495 | } else { |
2496 | to_copy = write_count; | |
2497 | } | |
d7a90491 | 2498 | memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); |
10b468bd | 2499 | /* updating vs->off since we are not using below */ |
d7a90491 | 2500 | off += to_copy; |
10b468bd AK |
2501 | write_count -= to_copy; |
2502 | } | |
b858e80a | 2503 | |
d7a90491 | 2504 | return err; |
10b468bd AK |
2505 | } |
2506 | ||
8440e22e | 2507 | static void coroutine_fn v9fs_write(void *opaque) |
9f107513 | 2508 | { |
d7a90491 AK |
2509 | ssize_t err; |
2510 | int32_t fid; | |
2f008a8c AK |
2511 | uint64_t off; |
2512 | uint32_t count; | |
d7a90491 AK |
2513 | int32_t len = 0; |
2514 | int32_t total = 0; | |
2515 | size_t offset = 7; | |
2516 | V9fsFidState *fidp; | |
ff06030f VJ |
2517 | V9fsPDU *pdu = opaque; |
2518 | V9fsState *s = pdu->s; | |
302a0d3e SH |
2519 | QEMUIOVector qiov_full; |
2520 | QEMUIOVector qiov; | |
8449360c | 2521 | |
ddca7f86 MK |
2522 | err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); |
2523 | if (err < 0) { | |
dc295f83 | 2524 | pdu_complete(pdu, err); |
0289a412 | 2525 | return; |
ddca7f86 MK |
2526 | } |
2527 | offset += err; | |
cf45183b | 2528 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); |
302a0d3e | 2529 | trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); |
84dfb926 | 2530 | |
bccacf6c | 2531 | fidp = get_fid(pdu, fid); |
d7a90491 | 2532 | if (fidp == NULL) { |
8449360c | 2533 | err = -EINVAL; |
84dfb926 | 2534 | goto out_nofid; |
9f107513 | 2535 | } |
d7a90491 AK |
2536 | if (fidp->fid_type == P9_FID_FILE) { |
2537 | if (fidp->fs.fd == -1) { | |
10b468bd AK |
2538 | err = -EINVAL; |
2539 | goto out; | |
2540 | } | |
d7a90491 | 2541 | } else if (fidp->fid_type == P9_FID_XATTR) { |
10b468bd AK |
2542 | /* |
2543 | * setxattr operation | |
2544 | */ | |
302a0d3e SH |
2545 | err = v9fs_xattr_write(s, pdu, fidp, off, count, |
2546 | qiov_full.iov, qiov_full.niov); | |
d7a90491 | 2547 | goto out; |
10b468bd | 2548 | } else { |
8449360c AL |
2549 | err = -EINVAL; |
2550 | goto out; | |
2551 | } | |
302a0d3e | 2552 | qemu_iovec_init(&qiov, qiov_full.niov); |
d7a90491 | 2553 | do { |
302a0d3e | 2554 | qemu_iovec_reset(&qiov); |
1b093c48 | 2555 | qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); |
d7a90491 | 2556 | if (0) { |
302a0d3e | 2557 | print_sg(qiov.iov, qiov.niov); |
56d15a53 | 2558 | } |
d7a90491 AK |
2559 | /* Loop in case of EINTR */ |
2560 | do { | |
302a0d3e | 2561 | len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); |
d7a90491 AK |
2562 | if (len >= 0) { |
2563 | off += len; | |
2564 | total += len; | |
2565 | } | |
bccacf6c | 2566 | } while (len == -EINTR && !pdu->cancelled); |
d7a90491 AK |
2567 | if (len < 0) { |
2568 | /* IO error return the error */ | |
2569 | err = len; | |
302a0d3e | 2570 | goto out_qiov; |
d7a90491 | 2571 | } |
d7a90491 | 2572 | } while (total < count && len > 0); |
302a0d3e SH |
2573 | |
2574 | offset = 7; | |
ddca7f86 MK |
2575 | err = pdu_marshal(pdu, offset, "d", total); |
2576 | if (err < 0) { | |
fdfcc9ae | 2577 | goto out_qiov; |
ddca7f86 MK |
2578 | } |
2579 | err += offset; | |
7999f7e1 | 2580 | trace_v9fs_write_return(pdu->tag, pdu->id, total, err); |
302a0d3e SH |
2581 | out_qiov: |
2582 | qemu_iovec_destroy(&qiov); | |
8449360c | 2583 | out: |
bccacf6c | 2584 | put_fid(pdu, fidp); |
84dfb926 | 2585 | out_nofid: |
302a0d3e | 2586 | qemu_iovec_destroy(&qiov_full); |
dc295f83 | 2587 | pdu_complete(pdu, err); |
9f107513 AL |
2588 | } |
2589 | ||
8440e22e | 2590 | static void coroutine_fn v9fs_create(void *opaque) |
5e94c103 | 2591 | { |
baaa86d9 VJ |
2592 | int32_t fid; |
2593 | int err = 0; | |
2594 | size_t offset = 7; | |
2595 | V9fsFidState *fidp; | |
2596 | V9fsQID qid; | |
2597 | int32_t perm; | |
2598 | int8_t mode; | |
2289be19 | 2599 | V9fsPath path; |
baaa86d9 VJ |
2600 | struct stat stbuf; |
2601 | V9fsString name; | |
2602 | V9fsString extension; | |
baaa86d9 VJ |
2603 | int iounit; |
2604 | V9fsPDU *pdu = opaque; | |
5b3c77aa | 2605 | V9fsState *s = pdu->s; |
c494dd6f | 2606 | |
2289be19 | 2607 | v9fs_path_init(&path); |
ddca7f86 MK |
2608 | v9fs_string_init(&name); |
2609 | v9fs_string_init(&extension); | |
2610 | err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, | |
2611 | &perm, &mode, &extension); | |
2612 | if (err < 0) { | |
2613 | goto out_nofid; | |
2614 | } | |
c572f23a HPB |
2615 | trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); |
2616 | ||
fff39a7a GK |
2617 | if (name_is_illegal(name.data)) { |
2618 | err = -ENOENT; | |
2619 | goto out_nofid; | |
2620 | } | |
2621 | ||
805b5d98 GK |
2622 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2623 | err = -EEXIST; | |
2624 | goto out_nofid; | |
2625 | } | |
2626 | ||
bccacf6c | 2627 | fidp = get_fid(pdu, fid); |
baaa86d9 VJ |
2628 | if (fidp == NULL) { |
2629 | err = -EINVAL; | |
84dfb926 | 2630 | goto out_nofid; |
c494dd6f | 2631 | } |
d63fb193 LQ |
2632 | if (fidp->fid_type != P9_FID_NONE) { |
2633 | err = -EINVAL; | |
2634 | goto out; | |
2635 | } | |
baaa86d9 | 2636 | if (perm & P9_STAT_MODE_DIR) { |
bccacf6c | 2637 | err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, |
02cb7f3a | 2638 | fidp->uid, -1, &stbuf); |
baaa86d9 VJ |
2639 | if (err < 0) { |
2640 | goto out; | |
2641 | } | |
bccacf6c | 2642 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2643 | if (err < 0) { |
2644 | goto out; | |
2645 | } | |
5b3c77aa | 2646 | v9fs_path_write_lock(s); |
2289be19 | 2647 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2648 | v9fs_path_unlock(s); |
bccacf6c | 2649 | err = v9fs_co_opendir(pdu, fidp); |
baaa86d9 VJ |
2650 | if (err < 0) { |
2651 | goto out; | |
2652 | } | |
2653 | fidp->fid_type = P9_FID_DIR; | |
2654 | } else if (perm & P9_STAT_MODE_SYMLINK) { | |
bccacf6c | 2655 | err = v9fs_co_symlink(pdu, fidp, &name, |
02cb7f3a | 2656 | extension.data, -1 , &stbuf); |
baaa86d9 | 2657 | if (err < 0) { |
baaa86d9 VJ |
2658 | goto out; |
2659 | } | |
bccacf6c | 2660 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2661 | if (err < 0) { |
2662 | goto out; | |
2663 | } | |
5b3c77aa | 2664 | v9fs_path_write_lock(s); |
2289be19 | 2665 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2666 | v9fs_path_unlock(s); |
baaa86d9 | 2667 | } else if (perm & P9_STAT_MODE_LINK) { |
2289be19 | 2668 | int32_t ofid = atoi(extension.data); |
bccacf6c | 2669 | V9fsFidState *ofidp = get_fid(pdu, ofid); |
2289be19 | 2670 | if (ofidp == NULL) { |
baaa86d9 VJ |
2671 | err = -EINVAL; |
2672 | goto out; | |
2673 | } | |
bccacf6c AK |
2674 | err = v9fs_co_link(pdu, ofidp, fidp, &name); |
2675 | put_fid(pdu, ofidp); | |
2289be19 AK |
2676 | if (err < 0) { |
2677 | goto out; | |
2678 | } | |
bccacf6c | 2679 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
baaa86d9 | 2680 | if (err < 0) { |
2289be19 | 2681 | fidp->fid_type = P9_FID_NONE; |
baaa86d9 | 2682 | goto out; |
c494dd6f | 2683 | } |
5b3c77aa | 2684 | v9fs_path_write_lock(s); |
2289be19 | 2685 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2686 | v9fs_path_unlock(s); |
bccacf6c | 2687 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
02cb7f3a AK |
2688 | if (err < 0) { |
2689 | fidp->fid_type = P9_FID_NONE; | |
2690 | goto out; | |
2691 | } | |
baaa86d9 | 2692 | } else if (perm & P9_STAT_MODE_DEVICE) { |
c494dd6f AL |
2693 | char ctype; |
2694 | uint32_t major, minor; | |
2695 | mode_t nmode = 0; | |
2696 | ||
baaa86d9 | 2697 | if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { |
c494dd6f | 2698 | err = -errno; |
baaa86d9 | 2699 | goto out; |
c494dd6f AL |
2700 | } |
2701 | ||
2702 | switch (ctype) { | |
2703 | case 'c': | |
2704 | nmode = S_IFCHR; | |
2705 | break; | |
2706 | case 'b': | |
2707 | nmode = S_IFBLK; | |
2708 | break; | |
2709 | default: | |
2710 | err = -EIO; | |
baaa86d9 VJ |
2711 | goto out; |
2712 | } | |
c1568af5 | 2713 | |
baaa86d9 | 2714 | nmode |= perm & 0777; |
bccacf6c | 2715 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2716 | makedev(major, minor), nmode, &stbuf); |
baaa86d9 VJ |
2717 | if (err < 0) { |
2718 | goto out; | |
2719 | } | |
bccacf6c | 2720 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2721 | if (err < 0) { |
2722 | goto out; | |
2723 | } | |
5b3c77aa | 2724 | v9fs_path_write_lock(s); |
2289be19 | 2725 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2726 | v9fs_path_unlock(s); |
baaa86d9 | 2727 | } else if (perm & P9_STAT_MODE_NAMED_PIPE) { |
bccacf6c | 2728 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2729 | 0, S_IFIFO | (perm & 0777), &stbuf); |
baaa86d9 VJ |
2730 | if (err < 0) { |
2731 | goto out; | |
2732 | } | |
bccacf6c | 2733 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2734 | if (err < 0) { |
2735 | goto out; | |
2736 | } | |
5b3c77aa | 2737 | v9fs_path_write_lock(s); |
2289be19 | 2738 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2739 | v9fs_path_unlock(s); |
baaa86d9 | 2740 | } else if (perm & P9_STAT_MODE_SOCKET) { |
bccacf6c | 2741 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2742 | 0, S_IFSOCK | (perm & 0777), &stbuf); |
baaa86d9 VJ |
2743 | if (err < 0) { |
2744 | goto out; | |
2745 | } | |
bccacf6c | 2746 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2747 | if (err < 0) { |
2748 | goto out; | |
2749 | } | |
5b3c77aa | 2750 | v9fs_path_write_lock(s); |
2289be19 | 2751 | v9fs_path_copy(&fidp->path, &path); |
5b3c77aa | 2752 | v9fs_path_unlock(s); |
baaa86d9 | 2753 | } else { |
bccacf6c | 2754 | err = v9fs_co_open2(pdu, fidp, &name, -1, |
02cb7f3a | 2755 | omode_to_uflags(mode)|O_CREAT, perm, &stbuf); |
baaa86d9 VJ |
2756 | if (err < 0) { |
2757 | goto out; | |
2758 | } | |
2759 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
2760 | fidp->open_flags = omode_to_uflags(mode); |
2761 | if (fidp->open_flags & O_EXCL) { | |
2762 | /* | |
2763 | * We let the host file system do O_EXCL check | |
2764 | * We should not reclaim such fd | |
2765 | */ | |
2766 | fidp->flags |= FID_NON_RECLAIMABLE; | |
2767 | } | |
c494dd6f | 2768 | } |
bccacf6c | 2769 | iounit = get_iounit(pdu, &fidp->path); |
3b5ee9e8 AM |
2770 | err = stat_to_qid(pdu, &stbuf, &qid); |
2771 | if (err < 0) { | |
2772 | goto out; | |
2773 | } | |
ddca7f86 MK |
2774 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
2775 | if (err < 0) { | |
2776 | goto out; | |
2777 | } | |
2778 | err += offset; | |
7999f7e1 AK |
2779 | trace_v9fs_create_return(pdu->tag, pdu->id, |
2780 | qid.type, qid.version, qid.path, iounit); | |
c494dd6f | 2781 | out: |
bccacf6c | 2782 | put_fid(pdu, fidp); |
84dfb926 | 2783 | out_nofid: |
dc295f83 | 2784 | pdu_complete(pdu, err); |
baaa86d9 VJ |
2785 | v9fs_string_free(&name); |
2786 | v9fs_string_free(&extension); | |
2289be19 | 2787 | v9fs_path_free(&path); |
9f107513 AL |
2788 | } |
2789 | ||
8440e22e | 2790 | static void coroutine_fn v9fs_symlink(void *opaque) |
08c60fc9 | 2791 | { |
ff06030f | 2792 | V9fsPDU *pdu = opaque; |
3fa2a8d1 VJ |
2793 | V9fsString name; |
2794 | V9fsString symname; | |
3fa2a8d1 VJ |
2795 | V9fsFidState *dfidp; |
2796 | V9fsQID qid; | |
2797 | struct stat stbuf; | |
08c60fc9 | 2798 | int32_t dfid; |
08c60fc9 VJ |
2799 | int err = 0; |
2800 | gid_t gid; | |
3fa2a8d1 | 2801 | size_t offset = 7; |
08c60fc9 | 2802 | |
ddca7f86 MK |
2803 | v9fs_string_init(&name); |
2804 | v9fs_string_init(&symname); | |
2805 | err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); | |
2806 | if (err < 0) { | |
2807 | goto out_nofid; | |
2808 | } | |
c572f23a | 2809 | trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); |
08c60fc9 | 2810 | |
fff39a7a GK |
2811 | if (name_is_illegal(name.data)) { |
2812 | err = -ENOENT; | |
2813 | goto out_nofid; | |
2814 | } | |
2815 | ||
805b5d98 GK |
2816 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2817 | err = -EEXIST; | |
2818 | goto out_nofid; | |
2819 | } | |
2820 | ||
bccacf6c | 2821 | dfidp = get_fid(pdu, dfid); |
3fa2a8d1 | 2822 | if (dfidp == NULL) { |
08c60fc9 | 2823 | err = -EINVAL; |
84dfb926 | 2824 | goto out_nofid; |
08c60fc9 | 2825 | } |
bccacf6c | 2826 | err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); |
3fa2a8d1 VJ |
2827 | if (err < 0) { |
2828 | goto out; | |
2829 | } | |
3b5ee9e8 AM |
2830 | err = stat_to_qid(pdu, &stbuf, &qid); |
2831 | if (err < 0) { | |
2832 | goto out; | |
2833 | } | |
ddca7f86 MK |
2834 | err = pdu_marshal(pdu, offset, "Q", &qid); |
2835 | if (err < 0) { | |
2836 | goto out; | |
2837 | } | |
2838 | err += offset; | |
7999f7e1 AK |
2839 | trace_v9fs_symlink_return(pdu->tag, pdu->id, |
2840 | qid.type, qid.version, qid.path); | |
08c60fc9 | 2841 | out: |
bccacf6c | 2842 | put_fid(pdu, dfidp); |
84dfb926 | 2843 | out_nofid: |
dc295f83 | 2844 | pdu_complete(pdu, err); |
3fa2a8d1 VJ |
2845 | v9fs_string_free(&name); |
2846 | v9fs_string_free(&symname); | |
08c60fc9 VJ |
2847 | } |
2848 | ||
a1bf8b74 | 2849 | static void coroutine_fn v9fs_flush(void *opaque) |
9f107513 | 2850 | { |
ddca7f86 | 2851 | ssize_t err; |
bccacf6c AK |
2852 | int16_t tag; |
2853 | size_t offset = 7; | |
d5f2af7b | 2854 | V9fsPDU *cancel_pdu = NULL; |
ff06030f VJ |
2855 | V9fsPDU *pdu = opaque; |
2856 | V9fsState *s = pdu->s; | |
bccacf6c | 2857 | |
ddca7f86 MK |
2858 | err = pdu_unmarshal(pdu, offset, "w", &tag); |
2859 | if (err < 0) { | |
dc295f83 | 2860 | pdu_complete(pdu, err); |
ddca7f86 MK |
2861 | return; |
2862 | } | |
c572f23a | 2863 | trace_v9fs_flush(pdu->tag, pdu->id, tag); |
bccacf6c | 2864 | |
d5f2af7b | 2865 | if (pdu->tag == tag) { |
3dc6f869 | 2866 | warn_report("the guest sent a self-referencing 9P flush request"); |
d5f2af7b GK |
2867 | } else { |
2868 | QLIST_FOREACH(cancel_pdu, &s->active_list, next) { | |
2869 | if (cancel_pdu->tag == tag) { | |
2870 | break; | |
2871 | } | |
bccacf6c AK |
2872 | } |
2873 | } | |
2874 | if (cancel_pdu) { | |
2875 | cancel_pdu->cancelled = 1; | |
2876 | /* | |
2877 | * Wait for pdu to complete. | |
2878 | */ | |
1ace7cea | 2879 | qemu_co_queue_wait(&cancel_pdu->complete, NULL); |
18adde86 GK |
2880 | if (!qemu_co_queue_next(&cancel_pdu->complete)) { |
2881 | cancel_pdu->cancelled = 0; | |
2882 | pdu_free(cancel_pdu); | |
2883 | } | |
bccacf6c | 2884 | } |
dc295f83 | 2885 | pdu_complete(pdu, 7); |
9f107513 AL |
2886 | } |
2887 | ||
8440e22e | 2888 | static void coroutine_fn v9fs_link(void *opaque) |
b2c224be | 2889 | { |
ff06030f | 2890 | V9fsPDU *pdu = opaque; |
b2c224be VJ |
2891 | int32_t dfid, oldfid; |
2892 | V9fsFidState *dfidp, *oldfidp; | |
3a93113a | 2893 | V9fsString name; |
b2c224be VJ |
2894 | size_t offset = 7; |
2895 | int err = 0; | |
2896 | ||
ddca7f86 MK |
2897 | v9fs_string_init(&name); |
2898 | err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); | |
2899 | if (err < 0) { | |
2900 | goto out_nofid; | |
2901 | } | |
c572f23a | 2902 | trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); |
b2c224be | 2903 | |
fff39a7a GK |
2904 | if (name_is_illegal(name.data)) { |
2905 | err = -ENOENT; | |
2906 | goto out_nofid; | |
2907 | } | |
2908 | ||
805b5d98 GK |
2909 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
2910 | err = -EEXIST; | |
2911 | goto out_nofid; | |
2912 | } | |
2913 | ||
bccacf6c | 2914 | dfidp = get_fid(pdu, dfid); |
b2c224be | 2915 | if (dfidp == NULL) { |
ffd66876 | 2916 | err = -ENOENT; |
84dfb926 | 2917 | goto out_nofid; |
b2c224be VJ |
2918 | } |
2919 | ||
bccacf6c | 2920 | oldfidp = get_fid(pdu, oldfid); |
b2c224be | 2921 | if (oldfidp == NULL) { |
ffd66876 | 2922 | err = -ENOENT; |
b2c224be VJ |
2923 | goto out; |
2924 | } | |
bccacf6c | 2925 | err = v9fs_co_link(pdu, oldfidp, dfidp, &name); |
ffd66876 VJ |
2926 | if (!err) { |
2927 | err = offset; | |
b2c224be | 2928 | } |
4c158678 | 2929 | put_fid(pdu, oldfidp); |
b2c224be | 2930 | out: |
bccacf6c | 2931 | put_fid(pdu, dfidp); |
84dfb926 | 2932 | out_nofid: |
b2c224be | 2933 | v9fs_string_free(&name); |
dc295f83 | 2934 | pdu_complete(pdu, err); |
b2c224be VJ |
2935 | } |
2936 | ||
532decb7 | 2937 | /* Only works with path name based fid */ |
8440e22e | 2938 | static void coroutine_fn v9fs_remove(void *opaque) |
9f107513 | 2939 | { |
5bae1900 | 2940 | int32_t fid; |
5bae1900 | 2941 | int err = 0; |
ae1ef571 VJ |
2942 | size_t offset = 7; |
2943 | V9fsFidState *fidp; | |
2944 | V9fsPDU *pdu = opaque; | |
5bae1900 | 2945 | |
ddca7f86 MK |
2946 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
2947 | if (err < 0) { | |
2948 | goto out_nofid; | |
2949 | } | |
c572f23a | 2950 | trace_v9fs_remove(pdu->tag, pdu->id, fid); |
5bae1900 | 2951 | |
bccacf6c | 2952 | fidp = get_fid(pdu, fid); |
ae1ef571 | 2953 | if (fidp == NULL) { |
5bae1900 | 2954 | err = -EINVAL; |
84dfb926 | 2955 | goto out_nofid; |
9f107513 | 2956 | } |
532decb7 | 2957 | /* if fs driver is not path based, return EOPNOTSUPP */ |
c98f1d4a | 2958 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { |
532decb7 AK |
2959 | err = -EOPNOTSUPP; |
2960 | goto out_err; | |
2961 | } | |
7a462745 AK |
2962 | /* |
2963 | * IF the file is unlinked, we cannot reopen | |
2964 | * the file later. So don't reclaim fd | |
2965 | */ | |
bccacf6c | 2966 | err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); |
7a462745 AK |
2967 | if (err < 0) { |
2968 | goto out_err; | |
2969 | } | |
bccacf6c | 2970 | err = v9fs_co_remove(pdu, &fidp->path); |
ae1ef571 VJ |
2971 | if (!err) { |
2972 | err = offset; | |
2973 | } | |
7a462745 | 2974 | out_err: |
ae1ef571 | 2975 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
84dfb926 | 2976 | clunk_fid(pdu->s, fidp->fid); |
bccacf6c | 2977 | put_fid(pdu, fidp); |
84dfb926 | 2978 | out_nofid: |
dc295f83 | 2979 | pdu_complete(pdu, err); |
9f107513 AL |
2980 | } |
2981 | ||
8440e22e | 2982 | static void coroutine_fn v9fs_unlinkat(void *opaque) |
7834cf77 AK |
2983 | { |
2984 | int err = 0; | |
2985 | V9fsString name; | |
67e87345 | 2986 | int32_t dfid, flags, rflags = 0; |
7834cf77 | 2987 | size_t offset = 7; |
2289be19 | 2988 | V9fsPath path; |
7834cf77 AK |
2989 | V9fsFidState *dfidp; |
2990 | V9fsPDU *pdu = opaque; | |
7834cf77 | 2991 | |
ddca7f86 MK |
2992 | v9fs_string_init(&name); |
2993 | err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); | |
2994 | if (err < 0) { | |
2995 | goto out_nofid; | |
2996 | } | |
fff39a7a GK |
2997 | |
2998 | if (name_is_illegal(name.data)) { | |
2999 | err = -ENOENT; | |
3000 | goto out_nofid; | |
3001 | } | |
3002 | ||
805b5d98 GK |
3003 | if (!strcmp(".", name.data)) { |
3004 | err = -EINVAL; | |
3005 | goto out_nofid; | |
3006 | } | |
3007 | ||
3008 | if (!strcmp("..", name.data)) { | |
3009 | err = -ENOTEMPTY; | |
3010 | goto out_nofid; | |
3011 | } | |
3012 | ||
67e87345 KF |
3013 | if (flags & ~P9_DOTL_AT_REMOVEDIR) { |
3014 | err = -EINVAL; | |
3015 | goto out_nofid; | |
3016 | } | |
3017 | ||
3018 | if (flags & P9_DOTL_AT_REMOVEDIR) { | |
3019 | rflags |= AT_REMOVEDIR; | |
3020 | } | |
3021 | ||
bccacf6c | 3022 | dfidp = get_fid(pdu, dfid); |
7834cf77 AK |
3023 | if (dfidp == NULL) { |
3024 | err = -EINVAL; | |
3025 | goto out_nofid; | |
3026 | } | |
7834cf77 AK |
3027 | /* |
3028 | * IF the file is unlinked, we cannot reopen | |
3029 | * the file later. So don't reclaim fd | |
3030 | */ | |
2289be19 | 3031 | v9fs_path_init(&path); |
bccacf6c | 3032 | err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); |
2289be19 AK |
3033 | if (err < 0) { |
3034 | goto out_err; | |
3035 | } | |
bccacf6c | 3036 | err = v9fs_mark_fids_unreclaim(pdu, &path); |
7834cf77 AK |
3037 | if (err < 0) { |
3038 | goto out_err; | |
3039 | } | |
67e87345 | 3040 | err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, rflags); |
7834cf77 AK |
3041 | if (!err) { |
3042 | err = offset; | |
3043 | } | |
3044 | out_err: | |
bccacf6c | 3045 | put_fid(pdu, dfidp); |
2289be19 | 3046 | v9fs_path_free(&path); |
7834cf77 | 3047 | out_nofid: |
dc295f83 | 3048 | pdu_complete(pdu, err); |
7834cf77 AK |
3049 | v9fs_string_free(&name); |
3050 | } | |
3051 | ||
2289be19 AK |
3052 | |
3053 | /* Only works with path name based fid */ | |
8440e22e GK |
3054 | static int coroutine_fn v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, |
3055 | int32_t newdirfid, | |
3056 | V9fsString *name) | |
8cf89e00 | 3057 | { |
c7b4b0b3 | 3058 | int err = 0; |
2289be19 AK |
3059 | V9fsPath new_path; |
3060 | V9fsFidState *tfidp; | |
bccacf6c | 3061 | V9fsState *s = pdu->s; |
84dfb926 | 3062 | V9fsFidState *dirfidp = NULL; |
8cf89e00 | 3063 | |
2289be19 | 3064 | v9fs_path_init(&new_path); |
930b1e17 | 3065 | if (newdirfid != -1) { |
bccacf6c | 3066 | dirfidp = get_fid(pdu, newdirfid); |
c7b4b0b3 | 3067 | if (dirfidp == NULL) { |
b858e80a | 3068 | return -ENOENT; |
c7b4b0b3 | 3069 | } |
49dd946b GK |
3070 | if (fidp->fid_type != P9_FID_NONE) { |
3071 | err = -EINVAL; | |
3072 | goto out; | |
3073 | } | |
4fa62005 GK |
3074 | err = v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); |
3075 | if (err < 0) { | |
3076 | goto out; | |
3077 | } | |
c7b4b0b3 | 3078 | } else { |
4d8bc733 JD |
3079 | char *dir_name = g_path_get_dirname(fidp->path.data); |
3080 | V9fsPath dir_path; | |
3081 | ||
3082 | v9fs_path_init(&dir_path); | |
3083 | v9fs_path_sprintf(&dir_path, "%s", dir_name); | |
3084 | g_free(dir_name); | |
3085 | ||
3086 | err = v9fs_co_name_to_path(pdu, &dir_path, name->data, &new_path); | |
3087 | v9fs_path_free(&dir_path); | |
4fa62005 GK |
3088 | if (err < 0) { |
3089 | goto out; | |
3090 | } | |
c7b4b0b3 | 3091 | } |
bccacf6c | 3092 | err = v9fs_co_rename(pdu, &fidp->path, &new_path); |
2289be19 AK |
3093 | if (err < 0) { |
3094 | goto out; | |
3095 | } | |
3096 | /* | |
3097 | * Fixup fid's pointing to the old name to | |
3098 | * start pointing to the new name | |
3099 | */ | |
3100 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
3101 | if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { | |
3102 | /* replace the name */ | |
3103 | v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); | |
8cf89e00 AL |
3104 | } |
3105 | } | |
c7b4b0b3 | 3106 | out: |
84dfb926 | 3107 | if (dirfidp) { |
bccacf6c | 3108 | put_fid(pdu, dirfidp); |
84dfb926 | 3109 | } |
2289be19 | 3110 | v9fs_path_free(&new_path); |
c7b4b0b3 MK |
3111 | return err; |
3112 | } | |
3113 | ||
532decb7 | 3114 | /* Only works with path name based fid */ |
8440e22e | 3115 | static void coroutine_fn v9fs_rename(void *opaque) |
c7b4b0b3 MK |
3116 | { |
3117 | int32_t fid; | |
c7b4b0b3 | 3118 | ssize_t err = 0; |
930b1e17 AK |
3119 | size_t offset = 7; |
3120 | V9fsString name; | |
3121 | int32_t newdirfid; | |
3122 | V9fsFidState *fidp; | |
3123 | V9fsPDU *pdu = opaque; | |
3124 | V9fsState *s = pdu->s; | |
c7b4b0b3 | 3125 | |
ddca7f86 MK |
3126 | v9fs_string_init(&name); |
3127 | err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); | |
3128 | if (err < 0) { | |
3129 | goto out_nofid; | |
3130 | } | |
fff39a7a GK |
3131 | |
3132 | if (name_is_illegal(name.data)) { | |
3133 | err = -ENOENT; | |
3134 | goto out_nofid; | |
3135 | } | |
3136 | ||
805b5d98 GK |
3137 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
3138 | err = -EISDIR; | |
3139 | goto out_nofid; | |
3140 | } | |
3141 | ||
bccacf6c | 3142 | fidp = get_fid(pdu, fid); |
930b1e17 | 3143 | if (fidp == NULL) { |
c7b4b0b3 | 3144 | err = -ENOENT; |
84dfb926 | 3145 | goto out_nofid; |
c7b4b0b3 | 3146 | } |
49dd946b GK |
3147 | if (fidp->fid_type != P9_FID_NONE) { |
3148 | err = -EINVAL; | |
3149 | goto out; | |
3150 | } | |
532decb7 | 3151 | /* if fs driver is not path based, return EOPNOTSUPP */ |
c98f1d4a | 3152 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { |
532decb7 AK |
3153 | err = -EOPNOTSUPP; |
3154 | goto out; | |
3155 | } | |
3156 | v9fs_path_write_lock(s); | |
bccacf6c | 3157 | err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); |
532decb7 | 3158 | v9fs_path_unlock(s); |
930b1e17 AK |
3159 | if (!err) { |
3160 | err = offset; | |
3161 | } | |
532decb7 | 3162 | out: |
bccacf6c | 3163 | put_fid(pdu, fidp); |
84dfb926 | 3164 | out_nofid: |
dc295f83 | 3165 | pdu_complete(pdu, err); |
930b1e17 | 3166 | v9fs_string_free(&name); |
c7b4b0b3 MK |
3167 | } |
3168 | ||
4fa62005 GK |
3169 | static int coroutine_fn v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, |
3170 | V9fsString *old_name, | |
3171 | V9fsPath *newdir, | |
3172 | V9fsString *new_name) | |
2289be19 AK |
3173 | { |
3174 | V9fsFidState *tfidp; | |
3175 | V9fsPath oldpath, newpath; | |
bccacf6c | 3176 | V9fsState *s = pdu->s; |
4fa62005 | 3177 | int err; |
2289be19 AK |
3178 | |
3179 | v9fs_path_init(&oldpath); | |
3180 | v9fs_path_init(&newpath); | |
4fa62005 GK |
3181 | err = v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); |
3182 | if (err < 0) { | |
3183 | goto out; | |
3184 | } | |
3185 | err = v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); | |
3186 | if (err < 0) { | |
3187 | goto out; | |
3188 | } | |
2289be19 AK |
3189 | |
3190 | /* | |
3191 | * Fixup fid's pointing to the old name to | |
3192 | * start pointing to the new name | |
3193 | */ | |
3194 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
3195 | if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { | |
3196 | /* replace the name */ | |
3197 | v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); | |
3198 | } | |
3199 | } | |
4fa62005 | 3200 | out: |
2289be19 AK |
3201 | v9fs_path_free(&oldpath); |
3202 | v9fs_path_free(&newpath); | |
4fa62005 | 3203 | return err; |
2289be19 AK |
3204 | } |
3205 | ||
8440e22e GK |
3206 | static int coroutine_fn v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, |
3207 | V9fsString *old_name, | |
3208 | int32_t newdirfid, | |
3209 | V9fsString *new_name) | |
89bf6593 AK |
3210 | { |
3211 | int err = 0; | |
bccacf6c | 3212 | V9fsState *s = pdu->s; |
89bf6593 AK |
3213 | V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; |
3214 | ||
bccacf6c | 3215 | olddirfidp = get_fid(pdu, olddirfid); |
89bf6593 AK |
3216 | if (olddirfidp == NULL) { |
3217 | err = -ENOENT; | |
3218 | goto out; | |
3219 | } | |
89bf6593 | 3220 | if (newdirfid != -1) { |
bccacf6c | 3221 | newdirfidp = get_fid(pdu, newdirfid); |
89bf6593 AK |
3222 | if (newdirfidp == NULL) { |
3223 | err = -ENOENT; | |
3224 | goto out; | |
3225 | } | |
89bf6593 | 3226 | } else { |
bccacf6c | 3227 | newdirfidp = get_fid(pdu, olddirfid); |
89bf6593 AK |
3228 | } |
3229 | ||
bccacf6c | 3230 | err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, |
2289be19 AK |
3231 | &newdirfidp->path, new_name); |
3232 | if (err < 0) { | |
3233 | goto out; | |
89bf6593 | 3234 | } |
c98f1d4a | 3235 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { |
532decb7 | 3236 | /* Only for path based fid we need to do the below fixup */ |
4fa62005 GK |
3237 | err = v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, |
3238 | &newdirfidp->path, new_name); | |
532decb7 | 3239 | } |
89bf6593 AK |
3240 | out: |
3241 | if (olddirfidp) { | |
bccacf6c | 3242 | put_fid(pdu, olddirfidp); |
89bf6593 AK |
3243 | } |
3244 | if (newdirfidp) { | |
bccacf6c | 3245 | put_fid(pdu, newdirfidp); |
89bf6593 | 3246 | } |
89bf6593 AK |
3247 | return err; |
3248 | } | |
3249 | ||
8440e22e | 3250 | static void coroutine_fn v9fs_renameat(void *opaque) |
89bf6593 AK |
3251 | { |
3252 | ssize_t err = 0; | |
3253 | size_t offset = 7; | |
3254 | V9fsPDU *pdu = opaque; | |
3255 | V9fsState *s = pdu->s; | |
3256 | int32_t olddirfid, newdirfid; | |
3257 | V9fsString old_name, new_name; | |
3258 | ||
ddca7f86 MK |
3259 | v9fs_string_init(&old_name); |
3260 | v9fs_string_init(&new_name); | |
3261 | err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, | |
3262 | &old_name, &newdirfid, &new_name); | |
3263 | if (err < 0) { | |
3264 | goto out_err; | |
3265 | } | |
89bf6593 | 3266 | |
fff39a7a GK |
3267 | if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { |
3268 | err = -ENOENT; | |
3269 | goto out_err; | |
3270 | } | |
3271 | ||
805b5d98 GK |
3272 | if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || |
3273 | !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { | |
3274 | err = -EISDIR; | |
3275 | goto out_err; | |
3276 | } | |
3277 | ||
532decb7 | 3278 | v9fs_path_write_lock(s); |
bccacf6c AK |
3279 | err = v9fs_complete_renameat(pdu, olddirfid, |
3280 | &old_name, newdirfid, &new_name); | |
532decb7 | 3281 | v9fs_path_unlock(s); |
89bf6593 AK |
3282 | if (!err) { |
3283 | err = offset; | |
3284 | } | |
ddca7f86 MK |
3285 | |
3286 | out_err: | |
dc295f83 | 3287 | pdu_complete(pdu, err); |
89bf6593 AK |
3288 | v9fs_string_free(&old_name); |
3289 | v9fs_string_free(&new_name); | |
3290 | } | |
3291 | ||
8440e22e | 3292 | static void coroutine_fn v9fs_wstat(void *opaque) |
8cf89e00 | 3293 | { |
b81d685e AK |
3294 | int32_t fid; |
3295 | int err = 0; | |
3296 | int16_t unused; | |
3297 | V9fsStat v9stat; | |
3298 | size_t offset = 7; | |
3299 | struct stat stbuf; | |
3300 | V9fsFidState *fidp; | |
3301 | V9fsPDU *pdu = opaque; | |
1d203986 | 3302 | V9fsState *s = pdu->s; |
8cf89e00 | 3303 | |
ddca7f86 MK |
3304 | v9fs_stat_init(&v9stat); |
3305 | err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); | |
3306 | if (err < 0) { | |
3307 | goto out_nofid; | |
3308 | } | |
c572f23a HPB |
3309 | trace_v9fs_wstat(pdu->tag, pdu->id, fid, |
3310 | v9stat.mode, v9stat.atime, v9stat.mtime); | |
84dfb926 | 3311 | |
bccacf6c | 3312 | fidp = get_fid(pdu, fid); |
b81d685e AK |
3313 | if (fidp == NULL) { |
3314 | err = -EINVAL; | |
84dfb926 | 3315 | goto out_nofid; |
8cf89e00 | 3316 | } |
b81d685e AK |
3317 | /* do we need to sync the file? */ |
3318 | if (donttouch_stat(&v9stat)) { | |
bccacf6c | 3319 | err = v9fs_co_fsync(pdu, fidp, 0); |
8cf89e00 AL |
3320 | goto out; |
3321 | } | |
b81d685e AK |
3322 | if (v9stat.mode != -1) { |
3323 | uint32_t v9_mode; | |
bccacf6c | 3324 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
b81d685e AK |
3325 | if (err < 0) { |
3326 | goto out; | |
3327 | } | |
3328 | v9_mode = stat_to_v9mode(&stbuf); | |
3329 | if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
3330 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
3331 | /* Attempting to change the type */ | |
3332 | err = -EIO; | |
3333 | goto out; | |
3334 | } | |
bccacf6c | 3335 | err = v9fs_co_chmod(pdu, &fidp->path, |
b81d685e AK |
3336 | v9mode_to_mode(v9stat.mode, |
3337 | &v9stat.extension)); | |
3338 | if (err < 0) { | |
3339 | goto out; | |
3340 | } | |
3341 | } | |
3342 | if (v9stat.mtime != -1 || v9stat.atime != -1) { | |
8fc39ae4 | 3343 | struct timespec times[2]; |
b81d685e AK |
3344 | if (v9stat.atime != -1) { |
3345 | times[0].tv_sec = v9stat.atime; | |
8fc39ae4 SK |
3346 | times[0].tv_nsec = 0; |
3347 | } else { | |
3348 | times[0].tv_nsec = UTIME_OMIT; | |
3349 | } | |
b81d685e AK |
3350 | if (v9stat.mtime != -1) { |
3351 | times[1].tv_sec = v9stat.mtime; | |
8fc39ae4 SK |
3352 | times[1].tv_nsec = 0; |
3353 | } else { | |
3354 | times[1].tv_nsec = UTIME_OMIT; | |
3355 | } | |
bccacf6c | 3356 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
b81d685e AK |
3357 | if (err < 0) { |
3358 | goto out; | |
8cf89e00 AL |
3359 | } |
3360 | } | |
b81d685e | 3361 | if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { |
bccacf6c | 3362 | err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); |
b81d685e | 3363 | if (err < 0) { |
8cf89e00 | 3364 | goto out; |
b81d685e | 3365 | } |
8cf89e00 | 3366 | } |
b81d685e | 3367 | if (v9stat.name.size != 0) { |
1d203986 | 3368 | v9fs_path_write_lock(s); |
bccacf6c | 3369 | err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); |
1d203986 | 3370 | v9fs_path_unlock(s); |
b81d685e AK |
3371 | if (err < 0) { |
3372 | goto out; | |
3373 | } | |
8cf89e00 | 3374 | } |
b81d685e | 3375 | if (v9stat.length != -1) { |
bccacf6c | 3376 | err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); |
b81d685e AK |
3377 | if (err < 0) { |
3378 | goto out; | |
3379 | } | |
8cf89e00 | 3380 | } |
b81d685e | 3381 | err = offset; |
8cf89e00 | 3382 | out: |
bccacf6c | 3383 | put_fid(pdu, fidp); |
84dfb926 | 3384 | out_nofid: |
b81d685e | 3385 | v9fs_stat_free(&v9stat); |
dc295f83 | 3386 | pdu_complete(pdu, err); |
9f107513 AL |
3387 | } |
3388 | ||
88a4763e AK |
3389 | static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
3390 | { | |
3391 | uint32_t f_type; | |
3392 | uint32_t f_bsize; | |
3393 | uint64_t f_blocks; | |
3394 | uint64_t f_bfree; | |
3395 | uint64_t f_bavail; | |
3396 | uint64_t f_files; | |
3397 | uint64_t f_ffree; | |
3398 | uint64_t fsid_val; | |
3399 | uint32_t f_namelen; | |
3400 | size_t offset = 7; | |
5e94c103 MK |
3401 | int32_t bsize_factor; |
3402 | ||
5e94c103 MK |
3403 | /* |
3404 | * compute bsize factor based on host file system block size | |
3405 | * and client msize | |
3406 | */ | |
88a4763e | 3407 | bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
5e94c103 MK |
3408 | if (!bsize_factor) { |
3409 | bsize_factor = 1; | |
3410 | } | |
88a4763e AK |
3411 | f_type = stbuf->f_type; |
3412 | f_bsize = stbuf->f_bsize; | |
3413 | f_bsize *= bsize_factor; | |
5e94c103 MK |
3414 | /* |
3415 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
3416 | * adjust(divide) the number of blocks, free blocks and available | |
3417 | * blocks by bsize factor | |
3418 | */ | |
88a4763e AK |
3419 | f_blocks = stbuf->f_blocks/bsize_factor; |
3420 | f_bfree = stbuf->f_bfree/bsize_factor; | |
3421 | f_bavail = stbuf->f_bavail/bsize_factor; | |
3422 | f_files = stbuf->f_files; | |
3423 | f_ffree = stbuf->f_ffree; | |
3424 | fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | | |
3425 | (unsigned long long)stbuf->f_fsid.__val[1] << 32; | |
3426 | f_namelen = stbuf->f_namelen; | |
be940c87 | 3427 | |
88a4763e AK |
3428 | return pdu_marshal(pdu, offset, "ddqqqqqqd", |
3429 | f_type, f_bsize, f_blocks, f_bfree, | |
3430 | f_bavail, f_files, f_ffree, | |
3431 | fsid_val, f_namelen); | |
be940c87 MK |
3432 | } |
3433 | ||
8440e22e | 3434 | static void coroutine_fn v9fs_statfs(void *opaque) |
be940c87 | 3435 | { |
88a4763e AK |
3436 | int32_t fid; |
3437 | ssize_t retval = 0; | |
3438 | size_t offset = 7; | |
3439 | V9fsFidState *fidp; | |
3440 | struct statfs stbuf; | |
ff06030f VJ |
3441 | V9fsPDU *pdu = opaque; |
3442 | V9fsState *s = pdu->s; | |
be940c87 | 3443 | |
ddca7f86 MK |
3444 | retval = pdu_unmarshal(pdu, offset, "d", &fid); |
3445 | if (retval < 0) { | |
3446 | goto out_nofid; | |
3447 | } | |
bccacf6c | 3448 | fidp = get_fid(pdu, fid); |
88a4763e AK |
3449 | if (fidp == NULL) { |
3450 | retval = -ENOENT; | |
84dfb926 | 3451 | goto out_nofid; |
be940c87 | 3452 | } |
bccacf6c | 3453 | retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); |
88a4763e AK |
3454 | if (retval < 0) { |
3455 | goto out; | |
3456 | } | |
ddca7f86 MK |
3457 | retval = v9fs_fill_statfs(s, pdu, &stbuf); |
3458 | if (retval < 0) { | |
3459 | goto out; | |
3460 | } | |
3461 | retval += offset; | |
be940c87 | 3462 | out: |
bccacf6c | 3463 | put_fid(pdu, fidp); |
84dfb926 | 3464 | out_nofid: |
dc295f83 | 3465 | pdu_complete(pdu, retval); |
be940c87 MK |
3466 | } |
3467 | ||
8440e22e | 3468 | static void coroutine_fn v9fs_mknod(void *opaque) |
5268cecc | 3469 | { |
1b733fed AK |
3470 | |
3471 | int mode; | |
3472 | gid_t gid; | |
5268cecc | 3473 | int32_t fid; |
1b733fed | 3474 | V9fsQID qid; |
5268cecc | 3475 | int err = 0; |
5268cecc | 3476 | int major, minor; |
1b733fed AK |
3477 | size_t offset = 7; |
3478 | V9fsString name; | |
3479 | struct stat stbuf; | |
1b733fed AK |
3480 | V9fsFidState *fidp; |
3481 | V9fsPDU *pdu = opaque; | |
5268cecc | 3482 | |
ddca7f86 MK |
3483 | v9fs_string_init(&name); |
3484 | err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, | |
3485 | &major, &minor, &gid); | |
3486 | if (err < 0) { | |
3487 | goto out_nofid; | |
3488 | } | |
c572f23a | 3489 | trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); |
5268cecc | 3490 | |
fff39a7a GK |
3491 | if (name_is_illegal(name.data)) { |
3492 | err = -ENOENT; | |
3493 | goto out_nofid; | |
3494 | } | |
3495 | ||
805b5d98 GK |
3496 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
3497 | err = -EEXIST; | |
3498 | goto out_nofid; | |
3499 | } | |
3500 | ||
bccacf6c | 3501 | fidp = get_fid(pdu, fid); |
5268cecc MK |
3502 | if (fidp == NULL) { |
3503 | err = -ENOENT; | |
84dfb926 | 3504 | goto out_nofid; |
5268cecc | 3505 | } |
bccacf6c | 3506 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, |
02cb7f3a | 3507 | makedev(major, minor), mode, &stbuf); |
1b733fed AK |
3508 | if (err < 0) { |
3509 | goto out; | |
3510 | } | |
3b5ee9e8 AM |
3511 | err = stat_to_qid(pdu, &stbuf, &qid); |
3512 | if (err < 0) { | |
3513 | goto out; | |
3514 | } | |
ddca7f86 MK |
3515 | err = pdu_marshal(pdu, offset, "Q", &qid); |
3516 | if (err < 0) { | |
3517 | goto out; | |
3518 | } | |
3519 | err += offset; | |
7999f7e1 AK |
3520 | trace_v9fs_mknod_return(pdu->tag, pdu->id, |
3521 | qid.type, qid.version, qid.path); | |
5268cecc | 3522 | out: |
bccacf6c | 3523 | put_fid(pdu, fidp); |
84dfb926 | 3524 | out_nofid: |
dc295f83 | 3525 | pdu_complete(pdu, err); |
1b733fed | 3526 | v9fs_string_free(&name); |
5268cecc MK |
3527 | } |
3528 | ||
82cc3ee8 MK |
3529 | /* |
3530 | * Implement posix byte range locking code | |
3531 | * Server side handling of locking code is very simple, because 9p server in | |
3532 | * QEMU can handle only one client. And most of the lock handling | |
3533 | * (like conflict, merging) etc is done by the VFS layer itself, so no need to | |
3534 | * do any thing in * qemu 9p server side lock code path. | |
3535 | * So when a TLOCK request comes, always return success | |
3536 | */ | |
8440e22e | 3537 | static void coroutine_fn v9fs_lock(void *opaque) |
82cc3ee8 | 3538 | { |
ddca7f86 | 3539 | V9fsFlock flock; |
0c27bf2a AK |
3540 | size_t offset = 7; |
3541 | struct stat stbuf; | |
3542 | V9fsFidState *fidp; | |
3543 | int32_t fid, err = 0; | |
ff06030f | 3544 | V9fsPDU *pdu = opaque; |
82cc3ee8 | 3545 | |
ddca7f86 MK |
3546 | v9fs_string_init(&flock.client_id); |
3547 | err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, | |
3548 | &flock.flags, &flock.start, &flock.length, | |
3549 | &flock.proc_id, &flock.client_id); | |
3550 | if (err < 0) { | |
3551 | goto out_nofid; | |
3552 | } | |
c572f23a | 3553 | trace_v9fs_lock(pdu->tag, pdu->id, fid, |
ddca7f86 | 3554 | flock.type, flock.start, flock.length); |
c572f23a | 3555 | |
82cc3ee8 MK |
3556 | |
3557 | /* We support only block flag now (that too ignored currently) */ | |
ddca7f86 | 3558 | if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { |
82cc3ee8 | 3559 | err = -EINVAL; |
84dfb926 | 3560 | goto out_nofid; |
82cc3ee8 | 3561 | } |
bccacf6c | 3562 | fidp = get_fid(pdu, fid); |
0c27bf2a | 3563 | if (fidp == NULL) { |
82cc3ee8 | 3564 | err = -ENOENT; |
84dfb926 | 3565 | goto out_nofid; |
82cc3ee8 | 3566 | } |
cc720ddb | 3567 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
82cc3ee8 | 3568 | if (err < 0) { |
82cc3ee8 MK |
3569 | goto out; |
3570 | } | |
4bae2b39 PB |
3571 | err = pdu_marshal(pdu, offset, "b", P9_LOCK_SUCCESS); |
3572 | if (err < 0) { | |
3573 | goto out; | |
3574 | } | |
3575 | err += offset; | |
3576 | trace_v9fs_lock_return(pdu->tag, pdu->id, P9_LOCK_SUCCESS); | |
82cc3ee8 | 3577 | out: |
bccacf6c | 3578 | put_fid(pdu, fidp); |
84dfb926 | 3579 | out_nofid: |
dc295f83 | 3580 | pdu_complete(pdu, err); |
ddca7f86 | 3581 | v9fs_string_free(&flock.client_id); |
82cc3ee8 MK |
3582 | } |
3583 | ||
8f354003 MK |
3584 | /* |
3585 | * When a TGETLOCK request comes, always return success because all lock | |
3586 | * handling is done by client's VFS layer. | |
3587 | */ | |
8440e22e | 3588 | static void coroutine_fn v9fs_getlock(void *opaque) |
8f354003 | 3589 | { |
e4e414a4 AK |
3590 | size_t offset = 7; |
3591 | struct stat stbuf; | |
3592 | V9fsFidState *fidp; | |
ddca7f86 | 3593 | V9fsGetlock glock; |
e4e414a4 | 3594 | int32_t fid, err = 0; |
ff06030f | 3595 | V9fsPDU *pdu = opaque; |
8f354003 | 3596 | |
ddca7f86 MK |
3597 | v9fs_string_init(&glock.client_id); |
3598 | err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, | |
3599 | &glock.start, &glock.length, &glock.proc_id, | |
3600 | &glock.client_id); | |
3601 | if (err < 0) { | |
3602 | goto out_nofid; | |
3603 | } | |
c572f23a | 3604 | trace_v9fs_getlock(pdu->tag, pdu->id, fid, |
ddca7f86 | 3605 | glock.type, glock.start, glock.length); |
c572f23a | 3606 | |
bccacf6c | 3607 | fidp = get_fid(pdu, fid); |
e4e414a4 | 3608 | if (fidp == NULL) { |
8f354003 | 3609 | err = -ENOENT; |
84dfb926 | 3610 | goto out_nofid; |
8f354003 | 3611 | } |
cc720ddb | 3612 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
8f354003 | 3613 | if (err < 0) { |
8f354003 MK |
3614 | goto out; |
3615 | } | |
ddca7f86 MK |
3616 | glock.type = P9_LOCK_TYPE_UNLCK; |
3617 | err = pdu_marshal(pdu, offset, "bqqds", glock.type, | |
3618 | glock.start, glock.length, glock.proc_id, | |
3619 | &glock.client_id); | |
3620 | if (err < 0) { | |
3621 | goto out; | |
3622 | } | |
3623 | err += offset; | |
3624 | trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, | |
3625 | glock.length, glock.proc_id); | |
8f354003 | 3626 | out: |
bccacf6c | 3627 | put_fid(pdu, fidp); |
84dfb926 | 3628 | out_nofid: |
dc295f83 | 3629 | pdu_complete(pdu, err); |
ddca7f86 | 3630 | v9fs_string_free(&glock.client_id); |
8f354003 MK |
3631 | } |
3632 | ||
8440e22e | 3633 | static void coroutine_fn v9fs_mkdir(void *opaque) |
b67592ea | 3634 | { |
ff06030f | 3635 | V9fsPDU *pdu = opaque; |
e84861f7 | 3636 | size_t offset = 7; |
b67592ea | 3637 | int32_t fid; |
e84861f7 | 3638 | struct stat stbuf; |
e84861f7 | 3639 | V9fsQID qid; |
02cb7f3a | 3640 | V9fsString name; |
b67592ea MK |
3641 | V9fsFidState *fidp; |
3642 | gid_t gid; | |
3643 | int mode; | |
e84861f7 | 3644 | int err = 0; |
b67592ea | 3645 | |
ddca7f86 MK |
3646 | v9fs_string_init(&name); |
3647 | err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); | |
3648 | if (err < 0) { | |
3649 | goto out_nofid; | |
3650 | } | |
c572f23a HPB |
3651 | trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); |
3652 | ||
fff39a7a GK |
3653 | if (name_is_illegal(name.data)) { |
3654 | err = -ENOENT; | |
3655 | goto out_nofid; | |
3656 | } | |
3657 | ||
805b5d98 GK |
3658 | if (!strcmp(".", name.data) || !strcmp("..", name.data)) { |
3659 | err = -EEXIST; | |
3660 | goto out_nofid; | |
3661 | } | |
3662 | ||
bccacf6c | 3663 | fidp = get_fid(pdu, fid); |
b67592ea MK |
3664 | if (fidp == NULL) { |
3665 | err = -ENOENT; | |
84dfb926 | 3666 | goto out_nofid; |
b67592ea | 3667 | } |
bccacf6c | 3668 | err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); |
e84861f7 VJ |
3669 | if (err < 0) { |
3670 | goto out; | |
3671 | } | |
3b5ee9e8 AM |
3672 | err = stat_to_qid(pdu, &stbuf, &qid); |
3673 | if (err < 0) { | |
3674 | goto out; | |
3675 | } | |
ddca7f86 MK |
3676 | err = pdu_marshal(pdu, offset, "Q", &qid); |
3677 | if (err < 0) { | |
3678 | goto out; | |
3679 | } | |
3680 | err += offset; | |
7999f7e1 AK |
3681 | trace_v9fs_mkdir_return(pdu->tag, pdu->id, |
3682 | qid.type, qid.version, qid.path, err); | |
b67592ea | 3683 | out: |
bccacf6c | 3684 | put_fid(pdu, fidp); |
84dfb926 | 3685 | out_nofid: |
dc295f83 | 3686 | pdu_complete(pdu, err); |
e84861f7 | 3687 | v9fs_string_free(&name); |
b67592ea MK |
3688 | } |
3689 | ||
8440e22e | 3690 | static void coroutine_fn v9fs_xattrwalk(void *opaque) |
fa32ef88 | 3691 | { |
670185a6 AK |
3692 | int64_t size; |
3693 | V9fsString name; | |
fa32ef88 | 3694 | ssize_t err = 0; |
670185a6 | 3695 | size_t offset = 7; |
fa32ef88 | 3696 | int32_t fid, newfid; |
670185a6 | 3697 | V9fsFidState *file_fidp; |
84dfb926 | 3698 | V9fsFidState *xattr_fidp = NULL; |
670185a6 AK |
3699 | V9fsPDU *pdu = opaque; |
3700 | V9fsState *s = pdu->s; | |
fa32ef88 | 3701 | |
ddca7f86 MK |
3702 | v9fs_string_init(&name); |
3703 | err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); | |
3704 | if (err < 0) { | |
3705 | goto out_nofid; | |
3706 | } | |
c572f23a HPB |
3707 | trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); |
3708 | ||
bccacf6c | 3709 | file_fidp = get_fid(pdu, fid); |
670185a6 | 3710 | if (file_fidp == NULL) { |
fa32ef88 | 3711 | err = -ENOENT; |
84dfb926 | 3712 | goto out_nofid; |
fa32ef88 | 3713 | } |
670185a6 AK |
3714 | xattr_fidp = alloc_fid(s, newfid); |
3715 | if (xattr_fidp == NULL) { | |
fa32ef88 AK |
3716 | err = -EINVAL; |
3717 | goto out; | |
3718 | } | |
2289be19 | 3719 | v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); |
ba42ebb8 | 3720 | if (!v9fs_string_size(&name)) { |
fa32ef88 AK |
3721 | /* |
3722 | * listxattr request. Get the size first | |
3723 | */ | |
bccacf6c | 3724 | size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); |
670185a6 AK |
3725 | if (size < 0) { |
3726 | err = size; | |
84dfb926 | 3727 | clunk_fid(s, xattr_fidp->fid); |
670185a6 | 3728 | goto out; |
fa32ef88 | 3729 | } |
670185a6 AK |
3730 | /* |
3731 | * Read the xattr value | |
3732 | */ | |
3733 | xattr_fidp->fs.xattr.len = size; | |
3734 | xattr_fidp->fid_type = P9_FID_XATTR; | |
dd28fbbc | 3735 | xattr_fidp->fs.xattr.xattrwalk_fid = true; |
a647502c | 3736 | xattr_fidp->fs.xattr.value = g_malloc0(size); |
670185a6 | 3737 | if (size) { |
bccacf6c | 3738 | err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3739 | xattr_fidp->fs.xattr.value, |
3740 | xattr_fidp->fs.xattr.len); | |
3741 | if (err < 0) { | |
84dfb926 | 3742 | clunk_fid(s, xattr_fidp->fid); |
670185a6 AK |
3743 | goto out; |
3744 | } | |
3745 | } | |
ddca7f86 MK |
3746 | err = pdu_marshal(pdu, offset, "q", size); |
3747 | if (err < 0) { | |
3748 | goto out; | |
3749 | } | |
3750 | err += offset; | |
fa32ef88 AK |
3751 | } else { |
3752 | /* | |
3753 | * specific xattr fid. We check for xattr | |
3754 | * presence also collect the xattr size | |
3755 | */ | |
bccacf6c | 3756 | size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3757 | &name, NULL, 0); |
3758 | if (size < 0) { | |
3759 | err = size; | |
84dfb926 | 3760 | clunk_fid(s, xattr_fidp->fid); |
670185a6 | 3761 | goto out; |
fa32ef88 | 3762 | } |
670185a6 AK |
3763 | /* |
3764 | * Read the xattr value | |
3765 | */ | |
3766 | xattr_fidp->fs.xattr.len = size; | |
3767 | xattr_fidp->fid_type = P9_FID_XATTR; | |
dd28fbbc | 3768 | xattr_fidp->fs.xattr.xattrwalk_fid = true; |
a647502c | 3769 | xattr_fidp->fs.xattr.value = g_malloc0(size); |
670185a6 | 3770 | if (size) { |
bccacf6c | 3771 | err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3772 | &name, xattr_fidp->fs.xattr.value, |
3773 | xattr_fidp->fs.xattr.len); | |
3774 | if (err < 0) { | |
84dfb926 | 3775 | clunk_fid(s, xattr_fidp->fid); |
670185a6 AK |
3776 | goto out; |
3777 | } | |
3778 | } | |
ddca7f86 MK |
3779 | err = pdu_marshal(pdu, offset, "q", size); |
3780 | if (err < 0) { | |
3781 | goto out; | |
3782 | } | |
3783 | err += offset; | |
fa32ef88 | 3784 | } |
7999f7e1 | 3785 | trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); |
fa32ef88 | 3786 | out: |
bccacf6c | 3787 | put_fid(pdu, file_fidp); |
84dfb926 | 3788 | if (xattr_fidp) { |
bccacf6c | 3789 | put_fid(pdu, xattr_fidp); |
84dfb926 AK |
3790 | } |
3791 | out_nofid: | |
dc295f83 | 3792 | pdu_complete(pdu, err); |
670185a6 | 3793 | v9fs_string_free(&name); |
fa32ef88 AK |
3794 | } |
3795 | ||
8440e22e | 3796 | static void coroutine_fn v9fs_xattrcreate(void *opaque) |
10b468bd | 3797 | { |
aca6897f | 3798 | int flags, rflags = 0; |
10b468bd | 3799 | int32_t fid; |
3b79ef2c | 3800 | uint64_t size; |
10b468bd | 3801 | ssize_t err = 0; |
f10ff58d AK |
3802 | V9fsString name; |
3803 | size_t offset = 7; | |
3804 | V9fsFidState *file_fidp; | |
3805 | V9fsFidState *xattr_fidp; | |
3806 | V9fsPDU *pdu = opaque; | |
10b468bd | 3807 | |
ddca7f86 MK |
3808 | v9fs_string_init(&name); |
3809 | err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); | |
3810 | if (err < 0) { | |
3811 | goto out_nofid; | |
3812 | } | |
c572f23a | 3813 | trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); |
10b468bd | 3814 | |
aca6897f KF |
3815 | if (flags & ~(P9_XATTR_CREATE | P9_XATTR_REPLACE)) { |
3816 | err = -EINVAL; | |
3817 | goto out_nofid; | |
3818 | } | |
3819 | ||
3820 | if (flags & P9_XATTR_CREATE) { | |
3821 | rflags |= XATTR_CREATE; | |
3822 | } | |
3823 | ||
3824 | if (flags & P9_XATTR_REPLACE) { | |
3825 | rflags |= XATTR_REPLACE; | |
3826 | } | |
3827 | ||
3b79ef2c GK |
3828 | if (size > XATTR_SIZE_MAX) { |
3829 | err = -E2BIG; | |
3830 | goto out_nofid; | |
3831 | } | |
3832 | ||
bccacf6c | 3833 | file_fidp = get_fid(pdu, fid); |
f10ff58d | 3834 | if (file_fidp == NULL) { |
10b468bd | 3835 | err = -EINVAL; |
84dfb926 | 3836 | goto out_nofid; |
10b468bd | 3837 | } |
dd654e03 GK |
3838 | if (file_fidp->fid_type != P9_FID_NONE) { |
3839 | err = -EINVAL; | |
3840 | goto out_put_fid; | |
3841 | } | |
3842 | ||
10b468bd | 3843 | /* Make the file fid point to xattr */ |
f10ff58d AK |
3844 | xattr_fidp = file_fidp; |
3845 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3846 | xattr_fidp->fs.xattr.copied_len = 0; | |
dd28fbbc | 3847 | xattr_fidp->fs.xattr.xattrwalk_fid = false; |
f10ff58d | 3848 | xattr_fidp->fs.xattr.len = size; |
aca6897f | 3849 | xattr_fidp->fs.xattr.flags = rflags; |
f10ff58d AK |
3850 | v9fs_string_init(&xattr_fidp->fs.xattr.name); |
3851 | v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); | |
eb687602 | 3852 | xattr_fidp->fs.xattr.value = g_malloc0(size); |
f10ff58d | 3853 | err = offset; |
dd654e03 | 3854 | out_put_fid: |
bccacf6c | 3855 | put_fid(pdu, file_fidp); |
84dfb926 | 3856 | out_nofid: |
dc295f83 | 3857 | pdu_complete(pdu, err); |
f10ff58d | 3858 | v9fs_string_free(&name); |
10b468bd | 3859 | } |
fa32ef88 | 3860 | |
8440e22e | 3861 | static void coroutine_fn v9fs_readlink(void *opaque) |
df0973a4 | 3862 | { |
ff06030f | 3863 | V9fsPDU *pdu = opaque; |
7a5ca31e VJ |
3864 | size_t offset = 7; |
3865 | V9fsString target; | |
df0973a4 | 3866 | int32_t fid; |
df0973a4 MK |
3867 | int err = 0; |
3868 | V9fsFidState *fidp; | |
3869 | ||
ddca7f86 MK |
3870 | err = pdu_unmarshal(pdu, offset, "d", &fid); |
3871 | if (err < 0) { | |
3872 | goto out_nofid; | |
3873 | } | |
c572f23a | 3874 | trace_v9fs_readlink(pdu->tag, pdu->id, fid); |
bccacf6c | 3875 | fidp = get_fid(pdu, fid); |
df0973a4 MK |
3876 | if (fidp == NULL) { |
3877 | err = -ENOENT; | |
84dfb926 | 3878 | goto out_nofid; |
df0973a4 MK |
3879 | } |
3880 | ||
7a5ca31e | 3881 | v9fs_string_init(&target); |
bccacf6c | 3882 | err = v9fs_co_readlink(pdu, &fidp->path, &target); |
7a5ca31e VJ |
3883 | if (err < 0) { |
3884 | goto out; | |
3885 | } | |
ddca7f86 MK |
3886 | err = pdu_marshal(pdu, offset, "s", &target); |
3887 | if (err < 0) { | |
3888 | v9fs_string_free(&target); | |
3889 | goto out; | |
3890 | } | |
3891 | err += offset; | |
7999f7e1 | 3892 | trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); |
7a5ca31e | 3893 | v9fs_string_free(&target); |
df0973a4 | 3894 | out: |
bccacf6c | 3895 | put_fid(pdu, fidp); |
84dfb926 | 3896 | out_nofid: |
dc295f83 | 3897 | pdu_complete(pdu, err); |
df0973a4 MK |
3898 | } |
3899 | ||
ff06030f | 3900 | static CoroutineEntry *pdu_co_handlers[] = { |
c18e2f94 | 3901 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 3902 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 3903 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 3904 | [P9_TSETATTR] = v9fs_setattr, |
fa32ef88 | 3905 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
10b468bd | 3906 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
5268cecc | 3907 | [P9_TMKNOD] = v9fs_mknod, |
c7b4b0b3 | 3908 | [P9_TRENAME] = v9fs_rename, |
82cc3ee8 | 3909 | [P9_TLOCK] = v9fs_lock, |
8f354003 | 3910 | [P9_TGETLOCK] = v9fs_getlock, |
89bf6593 | 3911 | [P9_TRENAMEAT] = v9fs_renameat, |
df0973a4 | 3912 | [P9_TREADLINK] = v9fs_readlink, |
7834cf77 | 3913 | [P9_TUNLINKAT] = v9fs_unlinkat, |
b67592ea | 3914 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 | 3915 | [P9_TVERSION] = v9fs_version, |
771e9d4c | 3916 | [P9_TLOPEN] = v9fs_open, |
9f107513 AL |
3917 | [P9_TATTACH] = v9fs_attach, |
3918 | [P9_TSTAT] = v9fs_stat, | |
3919 | [P9_TWALK] = v9fs_walk, | |
3920 | [P9_TCLUNK] = v9fs_clunk, | |
b41e95d3 | 3921 | [P9_TFSYNC] = v9fs_fsync, |
9f107513 AL |
3922 | [P9_TOPEN] = v9fs_open, |
3923 | [P9_TREAD] = v9fs_read, | |
3924 | #if 0 | |
3925 | [P9_TAUTH] = v9fs_auth, | |
3926 | #endif | |
3927 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 3928 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 3929 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 3930 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 3931 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
3932 | [P9_TWRITE] = v9fs_write, |
3933 | [P9_TWSTAT] = v9fs_wstat, | |
3934 | [P9_TREMOVE] = v9fs_remove, | |
3935 | }; | |
3936 | ||
8440e22e | 3937 | static void coroutine_fn v9fs_op_not_supp(void *opaque) |
5c3234c6 | 3938 | { |
ff06030f | 3939 | V9fsPDU *pdu = opaque; |
dc295f83 | 3940 | pdu_complete(pdu, -EOPNOTSUPP); |
5c3234c6 AK |
3941 | } |
3942 | ||
8440e22e | 3943 | static void coroutine_fn v9fs_fs_ro(void *opaque) |
2c74c2cb MK |
3944 | { |
3945 | V9fsPDU *pdu = opaque; | |
dc295f83 | 3946 | pdu_complete(pdu, -EROFS); |
2c74c2cb MK |
3947 | } |
3948 | ||
3949 | static inline bool is_read_only_op(V9fsPDU *pdu) | |
3950 | { | |
3951 | switch (pdu->id) { | |
3952 | case P9_TREADDIR: | |
3953 | case P9_TSTATFS: | |
3954 | case P9_TGETATTR: | |
3955 | case P9_TXATTRWALK: | |
3956 | case P9_TLOCK: | |
3957 | case P9_TGETLOCK: | |
3958 | case P9_TREADLINK: | |
3959 | case P9_TVERSION: | |
3960 | case P9_TLOPEN: | |
3961 | case P9_TATTACH: | |
3962 | case P9_TSTAT: | |
3963 | case P9_TWALK: | |
3964 | case P9_TCLUNK: | |
3965 | case P9_TFSYNC: | |
3966 | case P9_TOPEN: | |
3967 | case P9_TREAD: | |
3968 | case P9_TAUTH: | |
3969 | case P9_TFLUSH: | |
3970 | return 1; | |
3971 | default: | |
3972 | return 0; | |
3973 | } | |
3974 | } | |
3975 | ||
506f3275 | 3976 | void pdu_submit(V9fsPDU *pdu, P9MsgHeader *hdr) |
9f107513 | 3977 | { |
ff06030f VJ |
3978 | Coroutine *co; |
3979 | CoroutineEntry *handler; | |
ad38ce9e | 3980 | V9fsState *s = pdu->s; |
9f107513 | 3981 | |
506f3275 GK |
3982 | pdu->size = le32_to_cpu(hdr->size_le); |
3983 | pdu->id = hdr->id; | |
3984 | pdu->tag = le16_to_cpu(hdr->tag_le); | |
3985 | ||
ff06030f VJ |
3986 | if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || |
3987 | (pdu_co_handlers[pdu->id] == NULL)) { | |
5c3234c6 | 3988 | handler = v9fs_op_not_supp; |
d1471233 GK |
3989 | } else if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { |
3990 | handler = v9fs_fs_ro; | |
5c3234c6 | 3991 | } else { |
ff06030f | 3992 | handler = pdu_co_handlers[pdu->id]; |
5c3234c6 | 3993 | } |
2c74c2cb | 3994 | |
506f3275 | 3995 | qemu_co_queue_init(&pdu->complete); |
0b8b8753 PB |
3996 | co = qemu_coroutine_create(handler, pdu); |
3997 | qemu_coroutine_enter(co); | |
9f107513 AL |
3998 | } |
3999 | ||
2a0c56aa | 4000 | /* Returns 0 on success, 1 on failure. */ |
066eb006 GK |
4001 | int v9fs_device_realize_common(V9fsState *s, const V9fsTransport *t, |
4002 | Error **errp) | |
2a0c56aa | 4003 | { |
92c45122 | 4004 | ERRP_GUARD(); |
2a0c56aa WL |
4005 | int i, len; |
4006 | struct stat stat; | |
4007 | FsDriverEntry *fse; | |
4008 | V9fsPath path; | |
4009 | int rc = 1; | |
4010 | ||
066eb006 GK |
4011 | assert(!s->transport); |
4012 | s->transport = t; | |
4013 | ||
2a0c56aa WL |
4014 | /* initialize pdu allocator */ |
4015 | QLIST_INIT(&s->free_list); | |
4016 | QLIST_INIT(&s->active_list); | |
0d78289c | 4017 | for (i = 0; i < MAX_REQ; i++) { |
583f21f8 SS |
4018 | QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
4019 | s->pdus[i].s = s; | |
4020 | s->pdus[i].idx = i; | |
2a0c56aa WL |
4021 | } |
4022 | ||
4023 | v9fs_path_init(&path); | |
4024 | ||
4025 | fse = get_fsdev_fsentry(s->fsconf.fsdev_id); | |
4026 | ||
4027 | if (!fse) { | |
4028 | /* We don't have a fsdev identified by fsdev_id */ | |
4029 | error_setg(errp, "9pfs device couldn't find fsdev with the " | |
4030 | "id = %s", | |
4031 | s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); | |
4032 | goto out; | |
4033 | } | |
4034 | ||
4035 | if (!s->fsconf.tag) { | |
4036 | /* we haven't specified a mount_tag */ | |
4037 | error_setg(errp, "fsdev with id %s needs mount_tag arguments", | |
4038 | s->fsconf.fsdev_id); | |
4039 | goto out; | |
4040 | } | |
4041 | ||
4042 | s->ctx.export_flags = fse->export_flags; | |
4043 | s->ctx.fs_root = g_strdup(fse->path); | |
4044 | s->ctx.exops.get_st_gen = NULL; | |
4045 | len = strlen(s->fsconf.tag); | |
4046 | if (len > MAX_TAG_LEN - 1) { | |
4047 | error_setg(errp, "mount tag '%s' (%d bytes) is longer than " | |
4048 | "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); | |
4049 | goto out; | |
4050 | } | |
4051 | ||
4052 | s->tag = g_strdup(s->fsconf.tag); | |
4053 | s->ctx.uid = -1; | |
4054 | ||
4055 | s->ops = fse->ops; | |
4056 | ||
b96feb2c TS |
4057 | s->ctx.fmode = fse->fmode; |
4058 | s->ctx.dmode = fse->dmode; | |
4059 | ||
2a0c56aa WL |
4060 | s->fid_list = NULL; |
4061 | qemu_co_rwlock_init(&s->rename_lock); | |
4062 | ||
65603a80 GK |
4063 | if (s->ops->init(&s->ctx, errp) < 0) { |
4064 | error_prepend(errp, "cannot initialize fsdev '%s': ", | |
4065 | s->fsconf.fsdev_id); | |
2a0c56aa WL |
4066 | goto out; |
4067 | } | |
4068 | ||
4069 | /* | |
4070 | * Check details of export path, We need to use fs driver | |
4071 | * call back to do that. Since we are in the init path, we don't | |
4072 | * use co-routines here. | |
4073 | */ | |
4074 | if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { | |
4075 | error_setg(errp, | |
4076 | "error in converting name to path %s", strerror(errno)); | |
4077 | goto out; | |
4078 | } | |
4079 | if (s->ops->lstat(&s->ctx, &path, &stat)) { | |
4080 | error_setg(errp, "share path %s does not exist", fse->path); | |
4081 | goto out; | |
4082 | } else if (!S_ISDIR(stat.st_mode)) { | |
4083 | error_setg(errp, "share path %s is not a directory", fse->path); | |
4084 | goto out; | |
4085 | } | |
b8bbdb88 | 4086 | |
3b5ee9e8 AM |
4087 | s->dev_id = stat.st_dev; |
4088 | ||
6b6aa828 CS |
4089 | /* init inode remapping : */ |
4090 | /* hash table for variable length inode suffixes */ | |
4091 | qpd_table_init(&s->qpd_table); | |
4092 | /* hash table for slow/full inode remapping (most users won't need it) */ | |
4093 | qpf_table_init(&s->qpf_table); | |
4094 | /* hash table for quick inode remapping */ | |
1a6ed33c | 4095 | qpp_table_init(&s->qpp_table); |
6b6aa828 CS |
4096 | s->qp_ndevices = 0; |
4097 | s->qp_affix_next = 1; /* reserve 0 to detect overflow */ | |
f3fe4a2d | 4098 | s->qp_fullpath_next = 1; |
1a6ed33c | 4099 | |
b8bbdb88 PJ |
4100 | s->ctx.fst = &fse->fst; |
4101 | fsdev_throttle_init(s->ctx.fst); | |
4102 | ||
2a0c56aa WL |
4103 | rc = 0; |
4104 | out: | |
4105 | if (rc) { | |
b69c3c21 | 4106 | v9fs_device_unrealize_common(s); |
2a0c56aa | 4107 | } |
c0da0cb7 | 4108 | v9fs_path_free(&path); |
2a0c56aa WL |
4109 | return rc; |
4110 | } | |
4111 | ||
b69c3c21 | 4112 | void v9fs_device_unrealize_common(V9fsState *s) |
2a0c56aa | 4113 | { |
c0da0cb7 | 4114 | if (s->ops && s->ops->cleanup) { |
702dbcc2 LQ |
4115 | s->ops->cleanup(&s->ctx); |
4116 | } | |
c0da0cb7 GK |
4117 | if (s->ctx.fst) { |
4118 | fsdev_throttle_cleanup(s->ctx.fst); | |
4119 | } | |
2a0c56aa | 4120 | g_free(s->tag); |
6b6aa828 | 4121 | qp_table_destroy(&s->qpd_table); |
f3fe4a2d AM |
4122 | qp_table_destroy(&s->qpp_table); |
4123 | qp_table_destroy(&s->qpf_table); | |
4774718e | 4124 | g_free(s->ctx.fs_root); |
2a0c56aa WL |
4125 | } |
4126 | ||
0e44a0fd GK |
4127 | typedef struct VirtfsCoResetData { |
4128 | V9fsPDU pdu; | |
4129 | bool done; | |
4130 | } VirtfsCoResetData; | |
4131 | ||
4132 | static void coroutine_fn virtfs_co_reset(void *opaque) | |
4133 | { | |
4134 | VirtfsCoResetData *data = opaque; | |
4135 | ||
4136 | virtfs_reset(&data->pdu); | |
4137 | data->done = true; | |
4138 | } | |
4139 | ||
4140 | void v9fs_reset(V9fsState *s) | |
4141 | { | |
4142 | VirtfsCoResetData data = { .pdu = { .s = s }, .done = false }; | |
4143 | Coroutine *co; | |
4144 | ||
4145 | while (!QLIST_EMPTY(&s->active_list)) { | |
4146 | aio_poll(qemu_get_aio_context(), true); | |
4147 | } | |
4148 | ||
4149 | co = qemu_coroutine_create(virtfs_co_reset, &data); | |
4150 | qemu_coroutine_enter(co); | |
4151 | ||
4152 | while (!data.done) { | |
4153 | aio_poll(qemu_get_aio_context(), true); | |
4154 | } | |
4155 | } | |
4156 | ||
72a18977 | 4157 | static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) |
7a462745 AK |
4158 | { |
4159 | struct rlimit rlim; | |
4160 | if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { | |
63325b18 | 4161 | error_report("Failed to get the resource limit"); |
7a462745 AK |
4162 | exit(1); |
4163 | } | |
4164 | open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); | |
4165 | open_fd_rc = rlim.rlim_cur/2; | |
4166 | } |