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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 | ||
779b5b04 SH |
14 | #include <glib.h> |
15 | #include <glib/gprintf.h> | |
16 | ||
873c3213 SW |
17 | #include "hw/virtio.h" |
18 | #include "hw/pc.h" | |
9f107513 | 19 | #include "qemu_socket.h" |
873c3213 | 20 | #include "hw/virtio-pci.h" |
9f107513 AL |
21 | #include "virtio-9p.h" |
22 | #include "fsdev/qemu-fsdev.h" | |
fc22118d | 23 | #include "virtio-9p-xattr.h" |
ff06030f | 24 | #include "virtio-9p-coth.h" |
c572f23a | 25 | #include "trace.h" |
e9a0152b | 26 | #include "migration.h" |
9f107513 | 27 | |
7a462745 AK |
28 | int open_fd_hw; |
29 | int total_open_fd; | |
30 | static int open_fd_rc; | |
9f107513 | 31 | |
fac4f111 VJ |
32 | enum { |
33 | Oread = 0x00, | |
34 | Owrite = 0x01, | |
35 | Ordwr = 0x02, | |
36 | Oexec = 0x03, | |
37 | Oexcl = 0x04, | |
38 | Otrunc = 0x10, | |
39 | Orexec = 0x20, | |
40 | Orclose = 0x40, | |
41 | Oappend = 0x80, | |
42 | }; | |
43 | ||
44 | static int omode_to_uflags(int8_t mode) | |
45 | { | |
46 | int ret = 0; | |
47 | ||
48 | switch (mode & 3) { | |
49 | case Oread: | |
50 | ret = O_RDONLY; | |
51 | break; | |
52 | case Ordwr: | |
53 | ret = O_RDWR; | |
54 | break; | |
55 | case Owrite: | |
56 | ret = O_WRONLY; | |
57 | break; | |
58 | case Oexec: | |
59 | ret = O_RDONLY; | |
60 | break; | |
61 | } | |
62 | ||
63 | if (mode & Otrunc) { | |
64 | ret |= O_TRUNC; | |
65 | } | |
66 | ||
67 | if (mode & Oappend) { | |
68 | ret |= O_APPEND; | |
69 | } | |
70 | ||
71 | if (mode & Oexcl) { | |
72 | ret |= O_EXCL; | |
73 | } | |
74 | ||
75 | return ret; | |
76 | } | |
77 | ||
9844081b MK |
78 | struct dotl_openflag_map { |
79 | int dotl_flag; | |
80 | int open_flag; | |
81 | }; | |
82 | ||
83 | static int dotl_to_open_flags(int flags) | |
84 | { | |
85 | int i; | |
86 | /* | |
87 | * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY | |
88 | * and P9_DOTL_NOACCESS | |
89 | */ | |
90 | int oflags = flags & O_ACCMODE; | |
91 | ||
92 | struct dotl_openflag_map dotl_oflag_map[] = { | |
93 | { P9_DOTL_CREATE, O_CREAT }, | |
94 | { P9_DOTL_EXCL, O_EXCL }, | |
95 | { P9_DOTL_NOCTTY , O_NOCTTY }, | |
96 | { P9_DOTL_TRUNC, O_TRUNC }, | |
97 | { P9_DOTL_APPEND, O_APPEND }, | |
98 | { P9_DOTL_NONBLOCK, O_NONBLOCK } , | |
99 | { P9_DOTL_DSYNC, O_DSYNC }, | |
100 | { P9_DOTL_FASYNC, FASYNC }, | |
101 | { P9_DOTL_DIRECT, O_DIRECT }, | |
102 | { P9_DOTL_LARGEFILE, O_LARGEFILE }, | |
103 | { P9_DOTL_DIRECTORY, O_DIRECTORY }, | |
104 | { P9_DOTL_NOFOLLOW, O_NOFOLLOW }, | |
105 | { P9_DOTL_NOATIME, O_NOATIME }, | |
106 | { P9_DOTL_SYNC, O_SYNC }, | |
107 | }; | |
108 | ||
109 | for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { | |
110 | if (flags & dotl_oflag_map[i].dotl_flag) { | |
111 | oflags |= dotl_oflag_map[i].open_flag; | |
112 | } | |
113 | } | |
114 | ||
115 | return oflags; | |
116 | } | |
117 | ||
758e8e38 | 118 | void cred_init(FsCred *credp) |
131dcb25 | 119 | { |
758e8e38 VJ |
120 | credp->fc_uid = -1; |
121 | credp->fc_gid = -1; | |
122 | credp->fc_mode = -1; | |
123 | credp->fc_rdev = -1; | |
131dcb25 AL |
124 | } |
125 | ||
d3ab98e6 AK |
126 | static int get_dotl_openflags(V9fsState *s, int oflags) |
127 | { | |
128 | int flags; | |
129 | /* | |
130 | * Filter the client open flags | |
131 | */ | |
9844081b MK |
132 | flags = dotl_to_open_flags(oflags); |
133 | flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); | |
d3ab98e6 AK |
134 | /* |
135 | * Ignore direct disk access hint until the server supports it. | |
136 | */ | |
137 | flags &= ~O_DIRECT; | |
138 | return flags; | |
139 | } | |
140 | ||
70c18fc0 | 141 | void v9fs_string_init(V9fsString *str) |
a03f7874 AL |
142 | { |
143 | str->data = NULL; | |
144 | str->size = 0; | |
145 | } | |
146 | ||
70c18fc0 | 147 | void v9fs_string_free(V9fsString *str) |
a03f7874 | 148 | { |
7267c094 | 149 | g_free(str->data); |
a03f7874 AL |
150 | str->data = NULL; |
151 | str->size = 0; | |
152 | } | |
153 | ||
70c18fc0 | 154 | void v9fs_string_null(V9fsString *str) |
a03f7874 AL |
155 | { |
156 | v9fs_string_free(str); | |
157 | } | |
158 | ||
70c18fc0 | 159 | void GCC_FMT_ATTR(2, 3) |
c9ba47dc | 160 | v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
a03f7874 AL |
161 | { |
162 | va_list ap; | |
a03f7874 AL |
163 | |
164 | v9fs_string_free(str); | |
165 | ||
166 | va_start(ap, fmt); | |
779b5b04 | 167 | str->size = g_vasprintf(&str->data, fmt, ap); |
a03f7874 | 168 | va_end(ap); |
a03f7874 AL |
169 | } |
170 | ||
70c18fc0 | 171 | void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
a03f7874 AL |
172 | { |
173 | v9fs_string_free(lhs); | |
174 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
175 | } | |
176 | ||
2289be19 AK |
177 | void v9fs_path_init(V9fsPath *path) |
178 | { | |
179 | path->data = NULL; | |
180 | path->size = 0; | |
181 | } | |
182 | ||
183 | void v9fs_path_free(V9fsPath *path) | |
184 | { | |
185 | g_free(path->data); | |
186 | path->data = NULL; | |
187 | path->size = 0; | |
188 | } | |
189 | ||
190 | void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs) | |
191 | { | |
192 | v9fs_path_free(lhs); | |
193 | lhs->data = g_malloc(rhs->size); | |
194 | memcpy(lhs->data, rhs->data, rhs->size); | |
195 | lhs->size = rhs->size; | |
196 | } | |
197 | ||
198 | int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, | |
199 | const char *name, V9fsPath *path) | |
200 | { | |
201 | int err; | |
202 | err = s->ops->name_to_path(&s->ctx, dirpath, name, path); | |
203 | if (err < 0) { | |
204 | err = -errno; | |
205 | } | |
206 | return err; | |
207 | } | |
208 | ||
936532a4 MN |
209 | /* |
210 | * Return TRUE if s1 is an ancestor of s2. | |
211 | * | |
212 | * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". | |
213 | * As a special case, We treat s1 as ancestor of s2 if they are same! | |
214 | */ | |
2289be19 | 215 | static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) |
936532a4 | 216 | { |
2289be19 AK |
217 | if (!strncmp(s1->data, s2->data, s1->size - 1)) { |
218 | if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { | |
936532a4 MN |
219 | return 1; |
220 | } | |
221 | } | |
222 | return 0; | |
223 | } | |
224 | ||
a03f7874 AL |
225 | static size_t v9fs_string_size(V9fsString *str) |
226 | { | |
227 | return str->size; | |
228 | } | |
229 | ||
b9cb88b0 AK |
230 | /* |
231 | * returns 0 if fid got re-opened, 1 if not, < 0 on error */ | |
bccacf6c | 232 | static int v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) |
b9cb88b0 AK |
233 | { |
234 | int err = 1; | |
235 | if (f->fid_type == P9_FID_FILE) { | |
236 | if (f->fs.fd == -1) { | |
237 | do { | |
bccacf6c AK |
238 | err = v9fs_co_open(pdu, f, f->open_flags); |
239 | } while (err == -EINTR && !pdu->cancelled); | |
b9cb88b0 AK |
240 | } |
241 | } else if (f->fid_type == P9_FID_DIR) { | |
242 | if (f->fs.dir == NULL) { | |
243 | do { | |
bccacf6c AK |
244 | err = v9fs_co_opendir(pdu, f); |
245 | } while (err == -EINTR && !pdu->cancelled); | |
b9cb88b0 AK |
246 | } |
247 | } | |
248 | return err; | |
249 | } | |
250 | ||
bccacf6c | 251 | static V9fsFidState *get_fid(V9fsPDU *pdu, int32_t fid) |
286d5652 | 252 | { |
7a462745 | 253 | int err; |
286d5652 | 254 | V9fsFidState *f; |
bccacf6c | 255 | V9fsState *s = pdu->s; |
286d5652 AL |
256 | |
257 | for (f = s->fid_list; f; f = f->next) { | |
84dfb926 | 258 | BUG_ON(f->clunked); |
286d5652 | 259 | if (f->fid == fid) { |
7a462745 AK |
260 | /* |
261 | * Update the fid ref upfront so that | |
262 | * we don't get reclaimed when we yield | |
263 | * in open later. | |
264 | */ | |
84dfb926 | 265 | f->ref++; |
7a462745 AK |
266 | /* |
267 | * check whether we need to reopen the | |
268 | * file. We might have closed the fd | |
269 | * while trying to free up some file | |
270 | * descriptors. | |
271 | */ | |
bccacf6c | 272 | err = v9fs_reopen_fid(pdu, f); |
b9cb88b0 AK |
273 | if (err < 0) { |
274 | f->ref--; | |
275 | return NULL; | |
276 | } | |
7a462745 AK |
277 | /* |
278 | * Mark the fid as referenced so that the LRU | |
279 | * reclaim won't close the file descriptor | |
280 | */ | |
281 | f->flags |= FID_REFERENCED; | |
286d5652 AL |
282 | return f; |
283 | } | |
284 | } | |
286d5652 AL |
285 | return NULL; |
286 | } | |
287 | ||
288 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
289 | { | |
290 | V9fsFidState *f; | |
291 | ||
84dfb926 AK |
292 | for (f = s->fid_list; f; f = f->next) { |
293 | /* If fid is already there return NULL */ | |
294 | BUG_ON(f->clunked); | |
295 | if (f->fid == fid) { | |
296 | return NULL; | |
297 | } | |
286d5652 | 298 | } |
7267c094 | 299 | f = g_malloc0(sizeof(V9fsFidState)); |
286d5652 | 300 | f->fid = fid; |
d62dbb51 | 301 | f->fid_type = P9_FID_NONE; |
84dfb926 | 302 | f->ref = 1; |
7a462745 AK |
303 | /* |
304 | * Mark the fid as referenced so that the LRU | |
305 | * reclaim won't close the file descriptor | |
306 | */ | |
307 | f->flags |= FID_REFERENCED; | |
286d5652 AL |
308 | f->next = s->fid_list; |
309 | s->fid_list = f; | |
310 | ||
311 | return f; | |
312 | } | |
313 | ||
bccacf6c | 314 | static int v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) |
10b468bd AK |
315 | { |
316 | int retval = 0; | |
317 | ||
318 | if (fidp->fs.xattr.copied_len == -1) { | |
319 | /* getxattr/listxattr fid */ | |
320 | goto free_value; | |
321 | } | |
322 | /* | |
323 | * if this is fid for setxattr. clunk should | |
324 | * result in setxattr localcall | |
325 | */ | |
326 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { | |
327 | /* clunk after partial write */ | |
328 | retval = -EINVAL; | |
329 | goto free_out; | |
330 | } | |
9ed3ef26 | 331 | if (fidp->fs.xattr.len) { |
bccacf6c | 332 | retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, |
9ed3ef26 AK |
333 | fidp->fs.xattr.value, |
334 | fidp->fs.xattr.len, | |
335 | fidp->fs.xattr.flags); | |
336 | } else { | |
bccacf6c | 337 | retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); |
9ed3ef26 | 338 | } |
10b468bd AK |
339 | free_out: |
340 | v9fs_string_free(&fidp->fs.xattr.name); | |
341 | free_value: | |
342 | if (fidp->fs.xattr.value) { | |
7267c094 | 343 | g_free(fidp->fs.xattr.value); |
10b468bd AK |
344 | } |
345 | return retval; | |
346 | } | |
347 | ||
bccacf6c | 348 | static int free_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
286d5652 | 349 | { |
10b468bd | 350 | int retval = 0; |
84dfb926 AK |
351 | |
352 | if (fidp->fid_type == P9_FID_FILE) { | |
7a462745 AK |
353 | /* If we reclaimed the fd no need to close */ |
354 | if (fidp->fs.fd != -1) { | |
cc720ddb | 355 | retval = v9fs_co_close(pdu, &fidp->fs); |
7a462745 | 356 | } |
84dfb926 | 357 | } else if (fidp->fid_type == P9_FID_DIR) { |
95f65511 | 358 | if (fidp->fs.dir != NULL) { |
cc720ddb | 359 | retval = v9fs_co_closedir(pdu, &fidp->fs); |
95f65511 | 360 | } |
84dfb926 | 361 | } else if (fidp->fid_type == P9_FID_XATTR) { |
bccacf6c | 362 | retval = v9fs_xattr_fid_clunk(pdu, fidp); |
84dfb926 | 363 | } |
2289be19 | 364 | v9fs_path_free(&fidp->path); |
84dfb926 AK |
365 | g_free(fidp); |
366 | return retval; | |
367 | } | |
368 | ||
bccacf6c | 369 | static void put_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
84dfb926 AK |
370 | { |
371 | BUG_ON(!fidp->ref); | |
372 | fidp->ref--; | |
7a462745 AK |
373 | /* |
374 | * Don't free the fid if it is in reclaim list | |
375 | */ | |
84dfb926 | 376 | if (!fidp->ref && fidp->clunked) { |
e9a0152b AK |
377 | if (fidp->fid == pdu->s->root_fid) { |
378 | /* | |
379 | * if the clunked fid is root fid then we | |
380 | * have unmounted the fs on the client side. | |
381 | * delete the migration blocker. Ideally, this | |
382 | * should be hooked to transport close notification | |
383 | */ | |
384 | if (pdu->s->migration_blocker) { | |
385 | migrate_del_blocker(pdu->s->migration_blocker); | |
386 | error_free(pdu->s->migration_blocker); | |
387 | pdu->s->migration_blocker = NULL; | |
388 | } | |
389 | } | |
bccacf6c | 390 | free_fid(pdu, fidp); |
84dfb926 AK |
391 | } |
392 | } | |
393 | ||
ce421a19 | 394 | static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) |
84dfb926 | 395 | { |
286d5652 AL |
396 | V9fsFidState **fidpp, *fidp; |
397 | ||
398 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
399 | if ((*fidpp)->fid == fid) { | |
400 | break; | |
401 | } | |
402 | } | |
286d5652 | 403 | if (*fidpp == NULL) { |
ce421a19 | 404 | return NULL; |
286d5652 | 405 | } |
286d5652 AL |
406 | fidp = *fidpp; |
407 | *fidpp = fidp->next; | |
84dfb926 | 408 | fidp->clunked = 1; |
ce421a19 | 409 | return fidp; |
286d5652 AL |
410 | } |
411 | ||
bccacf6c | 412 | void v9fs_reclaim_fd(V9fsPDU *pdu) |
7a462745 AK |
413 | { |
414 | int reclaim_count = 0; | |
bccacf6c | 415 | V9fsState *s = pdu->s; |
7a462745 AK |
416 | V9fsFidState *f, *reclaim_list = NULL; |
417 | ||
418 | for (f = s->fid_list; f; f = f->next) { | |
419 | /* | |
420 | * Unlink fids cannot be reclaimed. Check | |
421 | * for them and skip them. Also skip fids | |
422 | * currently being operated on. | |
423 | */ | |
424 | if (f->ref || f->flags & FID_NON_RECLAIMABLE) { | |
425 | continue; | |
426 | } | |
427 | /* | |
428 | * if it is a recently referenced fid | |
429 | * we leave the fid untouched and clear the | |
430 | * reference bit. We come back to it later | |
431 | * in the next iteration. (a simple LRU without | |
432 | * moving list elements around) | |
433 | */ | |
434 | if (f->flags & FID_REFERENCED) { | |
435 | f->flags &= ~FID_REFERENCED; | |
436 | continue; | |
437 | } | |
438 | /* | |
439 | * Add fids to reclaim list. | |
440 | */ | |
441 | if (f->fid_type == P9_FID_FILE) { | |
442 | if (f->fs.fd != -1) { | |
443 | /* | |
444 | * Up the reference count so that | |
445 | * a clunk request won't free this fid | |
446 | */ | |
447 | f->ref++; | |
448 | f->rclm_lst = reclaim_list; | |
449 | reclaim_list = f; | |
450 | f->fs_reclaim.fd = f->fs.fd; | |
451 | f->fs.fd = -1; | |
452 | reclaim_count++; | |
453 | } | |
95f65511 AK |
454 | } else if (f->fid_type == P9_FID_DIR) { |
455 | if (f->fs.dir != NULL) { | |
456 | /* | |
457 | * Up the reference count so that | |
458 | * a clunk request won't free this fid | |
459 | */ | |
460 | f->ref++; | |
461 | f->rclm_lst = reclaim_list; | |
462 | reclaim_list = f; | |
463 | f->fs_reclaim.dir = f->fs.dir; | |
464 | f->fs.dir = NULL; | |
465 | reclaim_count++; | |
466 | } | |
7a462745 AK |
467 | } |
468 | if (reclaim_count >= open_fd_rc) { | |
469 | break; | |
470 | } | |
471 | } | |
472 | /* | |
473 | * Now close the fid in reclaim list. Free them if they | |
474 | * are already clunked. | |
475 | */ | |
476 | while (reclaim_list) { | |
477 | f = reclaim_list; | |
478 | reclaim_list = f->rclm_lst; | |
479 | if (f->fid_type == P9_FID_FILE) { | |
cc720ddb | 480 | v9fs_co_close(pdu, &f->fs_reclaim); |
95f65511 | 481 | } else if (f->fid_type == P9_FID_DIR) { |
cc720ddb | 482 | v9fs_co_closedir(pdu, &f->fs_reclaim); |
7a462745 AK |
483 | } |
484 | f->rclm_lst = NULL; | |
485 | /* | |
486 | * Now drop the fid reference, free it | |
487 | * if clunked. | |
488 | */ | |
bccacf6c | 489 | put_fid(pdu, f); |
7a462745 AK |
490 | } |
491 | } | |
492 | ||
bccacf6c | 493 | static int v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) |
7a462745 AK |
494 | { |
495 | int err; | |
bccacf6c | 496 | V9fsState *s = pdu->s; |
7a462745 AK |
497 | V9fsFidState *fidp, head_fid; |
498 | ||
499 | head_fid.next = s->fid_list; | |
500 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2289be19 AK |
501 | if (fidp->path.size != path->size) { |
502 | continue; | |
503 | } | |
504 | if (!memcmp(fidp->path.data, path->data, path->size)) { | |
7a462745 AK |
505 | /* Mark the fid non reclaimable. */ |
506 | fidp->flags |= FID_NON_RECLAIMABLE; | |
b9cb88b0 AK |
507 | |
508 | /* reopen the file/dir if already closed */ | |
bccacf6c | 509 | err = v9fs_reopen_fid(pdu, fidp); |
b9cb88b0 AK |
510 | if (err < 0) { |
511 | return -1; | |
512 | } | |
513 | /* | |
514 | * Go back to head of fid list because | |
515 | * the list could have got updated when | |
516 | * switched to the worker thread | |
517 | */ | |
518 | if (err == 0) { | |
7a462745 AK |
519 | fidp = &head_fid; |
520 | } | |
521 | } | |
522 | } | |
523 | return 0; | |
524 | } | |
525 | ||
b41e2992 DS |
526 | static void virtfs_reset(V9fsPDU *pdu) |
527 | { | |
528 | V9fsState *s = pdu->s; | |
529 | V9fsFidState *fidp = NULL; | |
530 | ||
531 | /* Free all fids */ | |
532 | while (s->fid_list) { | |
533 | fidp = s->fid_list; | |
534 | s->fid_list = fidp->next; | |
535 | ||
536 | if (fidp->ref) { | |
537 | fidp->clunked = 1; | |
538 | } else { | |
539 | free_fid(pdu, fidp); | |
540 | } | |
541 | } | |
542 | if (fidp) { | |
543 | /* One or more unclunked fids found... */ | |
544 | error_report("9pfs:%s: One or more uncluncked fids " | |
545 | "found during reset", __func__); | |
546 | } | |
547 | return; | |
548 | } | |
549 | ||
286d5652 AL |
550 | #define P9_QID_TYPE_DIR 0x80 |
551 | #define P9_QID_TYPE_SYMLINK 0x02 | |
552 | ||
553 | #define P9_STAT_MODE_DIR 0x80000000 | |
554 | #define P9_STAT_MODE_APPEND 0x40000000 | |
555 | #define P9_STAT_MODE_EXCL 0x20000000 | |
556 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
557 | #define P9_STAT_MODE_AUTH 0x08000000 | |
558 | #define P9_STAT_MODE_TMP 0x04000000 | |
559 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
560 | #define P9_STAT_MODE_LINK 0x01000000 | |
561 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
562 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
563 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
564 | #define P9_STAT_MODE_SETUID 0x00080000 | |
565 | #define P9_STAT_MODE_SETGID 0x00040000 | |
566 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
567 | ||
568 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
569 | P9_STAT_MODE_SYMLINK | \ | |
570 | P9_STAT_MODE_LINK | \ | |
571 | P9_STAT_MODE_DEVICE | \ | |
572 | P9_STAT_MODE_NAMED_PIPE | \ | |
573 | P9_STAT_MODE_SOCKET) | |
574 | ||
575 | /* This is the algorithm from ufs in spfs */ | |
576 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
577 | { | |
578 | size_t size; | |
579 | ||
25427ec1 | 580 | memset(&qidp->path, 0, sizeof(qidp->path)); |
286d5652 AL |
581 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
582 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
583 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
584 | qidp->type = 0; | |
585 | if (S_ISDIR(stbuf->st_mode)) { | |
586 | qidp->type |= P9_QID_TYPE_DIR; | |
587 | } | |
588 | if (S_ISLNK(stbuf->st_mode)) { | |
589 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
590 | } | |
591 | } | |
592 | ||
bccacf6c | 593 | static int fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, V9fsQID *qidp) |
286d5652 AL |
594 | { |
595 | struct stat stbuf; | |
596 | int err; | |
597 | ||
bccacf6c | 598 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
8c158561 | 599 | if (err < 0) { |
286d5652 AL |
600 | return err; |
601 | } | |
286d5652 AL |
602 | stat_to_qid(&stbuf, qidp); |
603 | return 0; | |
604 | } | |
605 | ||
9f107513 AL |
606 | static V9fsPDU *alloc_pdu(V9fsState *s) |
607 | { | |
608 | V9fsPDU *pdu = NULL; | |
609 | ||
610 | if (!QLIST_EMPTY(&s->free_list)) { | |
bccacf6c AK |
611 | pdu = QLIST_FIRST(&s->free_list); |
612 | QLIST_REMOVE(pdu, next); | |
613 | QLIST_INSERT_HEAD(&s->active_list, pdu, next); | |
9f107513 AL |
614 | } |
615 | return pdu; | |
616 | } | |
617 | ||
618 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
619 | { | |
620 | if (pdu) { | |
bccacf6c AK |
621 | /* |
622 | * Cancelled pdu are added back to the freelist | |
623 | * by flush request . | |
624 | */ | |
625 | if (!pdu->cancelled) { | |
626 | QLIST_REMOVE(pdu, next); | |
627 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
628 | } | |
9f107513 AL |
629 | } |
630 | } | |
631 | ||
632 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
633 | size_t offset, size_t size, int pack) | |
634 | { | |
635 | int i = 0; | |
636 | size_t copied = 0; | |
637 | ||
638 | for (i = 0; size && i < sg_count; i++) { | |
639 | size_t len; | |
640 | if (offset >= sg[i].iov_len) { | |
641 | /* skip this sg */ | |
642 | offset -= sg[i].iov_len; | |
643 | continue; | |
644 | } else { | |
645 | len = MIN(sg[i].iov_len - offset, size); | |
646 | if (pack) { | |
647 | memcpy(sg[i].iov_base + offset, addr, len); | |
648 | } else { | |
649 | memcpy(addr, sg[i].iov_base + offset, len); | |
650 | } | |
651 | size -= len; | |
652 | copied += len; | |
653 | addr += len; | |
654 | if (size) { | |
655 | offset = 0; | |
656 | continue; | |
657 | } | |
658 | } | |
659 | } | |
660 | ||
661 | return copied; | |
662 | } | |
663 | ||
405a549a AL |
664 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
665 | { | |
666 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
667 | offset, size, 0); | |
668 | } | |
669 | ||
670 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
671 | size_t size) | |
672 | { | |
673 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
674 | offset, size, 1); | |
675 | } | |
676 | ||
677 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
678 | { | |
679 | size_t pos = 0; | |
680 | int i, j; | |
681 | struct iovec *src_sg; | |
682 | unsigned int num; | |
683 | ||
684 | if (rx) { | |
685 | src_sg = pdu->elem.in_sg; | |
686 | num = pdu->elem.in_num; | |
687 | } else { | |
688 | src_sg = pdu->elem.out_sg; | |
689 | num = pdu->elem.out_num; | |
690 | } | |
691 | ||
692 | j = 0; | |
693 | for (i = 0; i < num; i++) { | |
694 | if (offset <= pos) { | |
695 | sg[j].iov_base = src_sg[i].iov_base; | |
696 | sg[j].iov_len = src_sg[i].iov_len; | |
697 | j++; | |
698 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
699 | sg[j].iov_base = src_sg[i].iov_base; | |
700 | sg[j].iov_len = src_sg[i].iov_len; | |
701 | sg[j].iov_base += (offset - pos); | |
702 | sg[j].iov_len -= (offset - pos); | |
703 | j++; | |
704 | } | |
705 | pos += src_sg[i].iov_len; | |
706 | } | |
707 | ||
708 | return j; | |
709 | } | |
710 | ||
711 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
712 | { | |
713 | size_t old_offset = offset; | |
714 | va_list ap; | |
715 | int i; | |
716 | ||
717 | va_start(ap, fmt); | |
718 | for (i = 0; fmt[i]; i++) { | |
719 | switch (fmt[i]) { | |
720 | case 'b': { | |
721 | uint8_t *valp = va_arg(ap, uint8_t *); | |
722 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
723 | break; | |
724 | } | |
725 | case 'w': { | |
726 | uint16_t val, *valp; | |
727 | valp = va_arg(ap, uint16_t *); | |
405a549a | 728 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 729 | *valp = le16_to_cpu(val); |
405a549a AL |
730 | break; |
731 | } | |
732 | case 'd': { | |
733 | uint32_t val, *valp; | |
734 | valp = va_arg(ap, uint32_t *); | |
405a549a | 735 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 736 | *valp = le32_to_cpu(val); |
405a549a AL |
737 | break; |
738 | } | |
739 | case 'q': { | |
740 | uint64_t val, *valp; | |
741 | valp = va_arg(ap, uint64_t *); | |
405a549a | 742 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 743 | *valp = le64_to_cpu(val); |
405a549a AL |
744 | break; |
745 | } | |
746 | case 'v': { | |
747 | struct iovec *iov = va_arg(ap, struct iovec *); | |
748 | int *iovcnt = va_arg(ap, int *); | |
749 | *iovcnt = pdu_copy_sg(pdu, offset, 0, iov); | |
750 | break; | |
751 | } | |
752 | case 's': { | |
753 | V9fsString *str = va_arg(ap, V9fsString *); | |
754 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
755 | /* FIXME: sanity check str->size */ | |
7267c094 | 756 | str->data = g_malloc(str->size + 1); |
405a549a AL |
757 | offset += pdu_unpack(str->data, pdu, offset, str->size); |
758 | str->data[str->size] = 0; | |
759 | break; | |
760 | } | |
761 | case 'Q': { | |
762 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
763 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
764 | &qidp->type, &qidp->version, &qidp->path); | |
765 | break; | |
766 | } | |
767 | case 'S': { | |
768 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
769 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
770 | &statp->size, &statp->type, &statp->dev, | |
771 | &statp->qid, &statp->mode, &statp->atime, | |
772 | &statp->mtime, &statp->length, | |
773 | &statp->name, &statp->uid, &statp->gid, | |
774 | &statp->muid, &statp->extension, | |
775 | &statp->n_uid, &statp->n_gid, | |
776 | &statp->n_muid); | |
777 | break; | |
778 | } | |
c79ce737 SK |
779 | case 'I': { |
780 | V9fsIattr *iattr = va_arg(ap, V9fsIattr *); | |
781 | offset += pdu_unmarshal(pdu, offset, "ddddqqqqq", | |
782 | &iattr->valid, &iattr->mode, | |
783 | &iattr->uid, &iattr->gid, &iattr->size, | |
784 | &iattr->atime_sec, &iattr->atime_nsec, | |
785 | &iattr->mtime_sec, &iattr->mtime_nsec); | |
786 | break; | |
787 | } | |
405a549a AL |
788 | default: |
789 | break; | |
790 | } | |
791 | } | |
792 | ||
793 | va_end(ap); | |
794 | ||
795 | return offset - old_offset; | |
796 | } | |
797 | ||
798 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
799 | { | |
800 | size_t old_offset = offset; | |
801 | va_list ap; | |
802 | int i; | |
803 | ||
804 | va_start(ap, fmt); | |
805 | for (i = 0; fmt[i]; i++) { | |
806 | switch (fmt[i]) { | |
807 | case 'b': { | |
808 | uint8_t val = va_arg(ap, int); | |
809 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
810 | break; | |
811 | } | |
812 | case 'w': { | |
813 | uint16_t val; | |
814 | cpu_to_le16w(&val, va_arg(ap, int)); | |
815 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
816 | break; | |
817 | } | |
818 | case 'd': { | |
819 | uint32_t val; | |
820 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
821 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
822 | break; | |
823 | } | |
824 | case 'q': { | |
825 | uint64_t val; | |
826 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
827 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
828 | break; | |
829 | } | |
830 | case 'v': { | |
831 | struct iovec *iov = va_arg(ap, struct iovec *); | |
832 | int *iovcnt = va_arg(ap, int *); | |
833 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
834 | break; | |
835 | } | |
836 | case 's': { | |
837 | V9fsString *str = va_arg(ap, V9fsString *); | |
838 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
839 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
840 | break; | |
841 | } | |
842 | case 'Q': { | |
843 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
844 | offset += pdu_marshal(pdu, offset, "bdq", | |
845 | qidp->type, qidp->version, qidp->path); | |
846 | break; | |
847 | } | |
848 | case 'S': { | |
849 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
850 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
851 | statp->size, statp->type, statp->dev, | |
852 | &statp->qid, statp->mode, statp->atime, | |
853 | statp->mtime, statp->length, &statp->name, | |
854 | &statp->uid, &statp->gid, &statp->muid, | |
855 | &statp->extension, statp->n_uid, | |
856 | statp->n_gid, statp->n_muid); | |
857 | break; | |
858 | } | |
00ede4c2 SK |
859 | case 'A': { |
860 | V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); | |
861 | offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq", | |
862 | statp->st_result_mask, | |
863 | &statp->qid, statp->st_mode, | |
864 | statp->st_uid, statp->st_gid, | |
865 | statp->st_nlink, statp->st_rdev, | |
866 | statp->st_size, statp->st_blksize, statp->st_blocks, | |
867 | statp->st_atime_sec, statp->st_atime_nsec, | |
868 | statp->st_mtime_sec, statp->st_mtime_nsec, | |
869 | statp->st_ctime_sec, statp->st_ctime_nsec, | |
870 | statp->st_btime_sec, statp->st_btime_nsec, | |
871 | statp->st_gen, statp->st_data_version); | |
872 | break; | |
873 | } | |
405a549a AL |
874 | default: |
875 | break; | |
876 | } | |
877 | } | |
878 | va_end(ap); | |
879 | ||
880 | return offset - old_offset; | |
881 | } | |
882 | ||
883 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
884 | { | |
885 | int8_t id = pdu->id + 1; /* Response */ | |
886 | ||
887 | if (len < 0) { | |
405a549a | 888 | int err = -len; |
8f4d1ca5 | 889 | len = 7; |
405a549a | 890 | |
8f4d1ca5 AB |
891 | if (s->proto_version != V9FS_PROTO_2000L) { |
892 | V9fsString str; | |
893 | ||
894 | str.data = strerror(err); | |
895 | str.size = strlen(str.data); | |
896 | ||
897 | len += pdu_marshal(pdu, len, "s", &str); | |
898 | id = P9_RERROR; | |
899 | } | |
405a549a | 900 | |
cf03eb2c | 901 | len += pdu_marshal(pdu, len, "d", err); |
405a549a | 902 | |
8f4d1ca5 AB |
903 | if (s->proto_version == V9FS_PROTO_2000L) { |
904 | id = P9_RLERROR; | |
905 | } | |
7999f7e1 | 906 | trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ |
405a549a AL |
907 | } |
908 | ||
909 | /* fill out the header */ | |
910 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
911 | ||
912 | /* keep these in sync */ | |
913 | pdu->size = len; | |
914 | pdu->id = id; | |
915 | ||
916 | /* push onto queue and notify */ | |
917 | virtqueue_push(s->vq, &pdu->elem, len); | |
918 | ||
919 | /* FIXME: we should batch these completions */ | |
920 | virtio_notify(&s->vdev, s->vq); | |
921 | ||
bccacf6c AK |
922 | /* Now wakeup anybody waiting in flush for this request */ |
923 | qemu_co_queue_next(&pdu->complete); | |
924 | ||
405a549a AL |
925 | free_pdu(s, pdu); |
926 | } | |
927 | ||
bb9e3216 AL |
928 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
929 | { | |
930 | mode_t ret; | |
931 | ||
932 | ret = mode & 0777; | |
933 | if (mode & P9_STAT_MODE_DIR) { | |
934 | ret |= S_IFDIR; | |
935 | } | |
936 | ||
cf03eb2c AB |
937 | if (mode & P9_STAT_MODE_SYMLINK) { |
938 | ret |= S_IFLNK; | |
939 | } | |
940 | if (mode & P9_STAT_MODE_SOCKET) { | |
941 | ret |= S_IFSOCK; | |
942 | } | |
943 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
944 | ret |= S_IFIFO; | |
945 | } | |
946 | if (mode & P9_STAT_MODE_DEVICE) { | |
947 | if (extension && extension->data[0] == 'c') { | |
948 | ret |= S_IFCHR; | |
949 | } else { | |
950 | ret |= S_IFBLK; | |
bb9e3216 AL |
951 | } |
952 | } | |
953 | ||
954 | if (!(ret&~0777)) { | |
955 | ret |= S_IFREG; | |
956 | } | |
957 | ||
958 | if (mode & P9_STAT_MODE_SETUID) { | |
959 | ret |= S_ISUID; | |
960 | } | |
961 | if (mode & P9_STAT_MODE_SETGID) { | |
962 | ret |= S_ISGID; | |
963 | } | |
964 | if (mode & P9_STAT_MODE_SETVTX) { | |
965 | ret |= S_ISVTX; | |
966 | } | |
967 | ||
968 | return ret; | |
969 | } | |
970 | ||
971 | static int donttouch_stat(V9fsStat *stat) | |
972 | { | |
973 | if (stat->type == -1 && | |
974 | stat->dev == -1 && | |
975 | stat->qid.type == -1 && | |
976 | stat->qid.version == -1 && | |
977 | stat->qid.path == -1 && | |
978 | stat->mode == -1 && | |
979 | stat->atime == -1 && | |
980 | stat->mtime == -1 && | |
981 | stat->length == -1 && | |
982 | !stat->name.size && | |
983 | !stat->uid.size && | |
984 | !stat->gid.size && | |
985 | !stat->muid.size && | |
986 | stat->n_uid == -1 && | |
987 | stat->n_gid == -1 && | |
988 | stat->n_muid == -1) { | |
989 | return 1; | |
990 | } | |
991 | ||
992 | return 0; | |
993 | } | |
994 | ||
995 | static void v9fs_stat_free(V9fsStat *stat) | |
996 | { | |
997 | v9fs_string_free(&stat->name); | |
998 | v9fs_string_free(&stat->uid); | |
999 | v9fs_string_free(&stat->gid); | |
1000 | v9fs_string_free(&stat->muid); | |
1001 | v9fs_string_free(&stat->extension); | |
1002 | } | |
1003 | ||
1004 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
1005 | { | |
1006 | uint32_t mode; | |
1007 | ||
1008 | mode = stbuf->st_mode & 0777; | |
1009 | if (S_ISDIR(stbuf->st_mode)) { | |
1010 | mode |= P9_STAT_MODE_DIR; | |
1011 | } | |
1012 | ||
cf03eb2c AB |
1013 | if (S_ISLNK(stbuf->st_mode)) { |
1014 | mode |= P9_STAT_MODE_SYMLINK; | |
1015 | } | |
bb9e3216 | 1016 | |
cf03eb2c AB |
1017 | if (S_ISSOCK(stbuf->st_mode)) { |
1018 | mode |= P9_STAT_MODE_SOCKET; | |
1019 | } | |
bb9e3216 | 1020 | |
cf03eb2c AB |
1021 | if (S_ISFIFO(stbuf->st_mode)) { |
1022 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
1023 | } | |
bb9e3216 | 1024 | |
cf03eb2c AB |
1025 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { |
1026 | mode |= P9_STAT_MODE_DEVICE; | |
1027 | } | |
bb9e3216 | 1028 | |
cf03eb2c AB |
1029 | if (stbuf->st_mode & S_ISUID) { |
1030 | mode |= P9_STAT_MODE_SETUID; | |
1031 | } | |
bb9e3216 | 1032 | |
cf03eb2c AB |
1033 | if (stbuf->st_mode & S_ISGID) { |
1034 | mode |= P9_STAT_MODE_SETGID; | |
1035 | } | |
bb9e3216 | 1036 | |
cf03eb2c AB |
1037 | if (stbuf->st_mode & S_ISVTX) { |
1038 | mode |= P9_STAT_MODE_SETVTX; | |
bb9e3216 AL |
1039 | } |
1040 | ||
1041 | return mode; | |
1042 | } | |
1043 | ||
bccacf6c | 1044 | static int stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name, |
bb9e3216 AL |
1045 | const struct stat *stbuf, |
1046 | V9fsStat *v9stat) | |
1047 | { | |
1048 | int err; | |
1049 | const char *str; | |
1050 | ||
1051 | memset(v9stat, 0, sizeof(*v9stat)); | |
1052 | ||
1053 | stat_to_qid(stbuf, &v9stat->qid); | |
1054 | v9stat->mode = stat_to_v9mode(stbuf); | |
1055 | v9stat->atime = stbuf->st_atime; | |
1056 | v9stat->mtime = stbuf->st_mtime; | |
1057 | v9stat->length = stbuf->st_size; | |
1058 | ||
1059 | v9fs_string_null(&v9stat->uid); | |
1060 | v9fs_string_null(&v9stat->gid); | |
1061 | v9fs_string_null(&v9stat->muid); | |
1062 | ||
cf03eb2c AB |
1063 | v9stat->n_uid = stbuf->st_uid; |
1064 | v9stat->n_gid = stbuf->st_gid; | |
1065 | v9stat->n_muid = 0; | |
bb9e3216 | 1066 | |
cf03eb2c | 1067 | v9fs_string_null(&v9stat->extension); |
bb9e3216 | 1068 | |
cf03eb2c | 1069 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { |
bccacf6c | 1070 | err = v9fs_co_readlink(pdu, name, &v9stat->extension); |
7a5ca31e | 1071 | if (err < 0) { |
cf03eb2c | 1072 | return err; |
bb9e3216 | 1073 | } |
cf03eb2c AB |
1074 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1075 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
1076 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
1077 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
1078 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
c9ba47dc SW |
1079 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
1080 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); | |
bb9e3216 AL |
1081 | } |
1082 | ||
1083 | str = strrchr(name->data, '/'); | |
1084 | if (str) { | |
1085 | str += 1; | |
1086 | } else { | |
1087 | str = name->data; | |
1088 | } | |
1089 | ||
1090 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
1091 | ||
1092 | v9stat->size = 61 + | |
1093 | v9fs_string_size(&v9stat->name) + | |
1094 | v9fs_string_size(&v9stat->uid) + | |
1095 | v9fs_string_size(&v9stat->gid) + | |
1096 | v9fs_string_size(&v9stat->muid) + | |
1097 | v9fs_string_size(&v9stat->extension); | |
1098 | return 0; | |
1099 | } | |
1100 | ||
00ede4c2 SK |
1101 | #define P9_STATS_MODE 0x00000001ULL |
1102 | #define P9_STATS_NLINK 0x00000002ULL | |
1103 | #define P9_STATS_UID 0x00000004ULL | |
1104 | #define P9_STATS_GID 0x00000008ULL | |
1105 | #define P9_STATS_RDEV 0x00000010ULL | |
1106 | #define P9_STATS_ATIME 0x00000020ULL | |
1107 | #define P9_STATS_MTIME 0x00000040ULL | |
1108 | #define P9_STATS_CTIME 0x00000080ULL | |
1109 | #define P9_STATS_INO 0x00000100ULL | |
1110 | #define P9_STATS_SIZE 0x00000200ULL | |
1111 | #define P9_STATS_BLOCKS 0x00000400ULL | |
1112 | ||
1113 | #define P9_STATS_BTIME 0x00000800ULL | |
1114 | #define P9_STATS_GEN 0x00001000ULL | |
1115 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
1116 | ||
1117 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
1118 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
1119 | ||
1120 | ||
1121 | static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, | |
8db21ce7 | 1122 | V9fsStatDotl *v9lstat) |
00ede4c2 SK |
1123 | { |
1124 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
1125 | ||
1126 | v9lstat->st_mode = stbuf->st_mode; | |
1127 | v9lstat->st_nlink = stbuf->st_nlink; | |
1128 | v9lstat->st_uid = stbuf->st_uid; | |
1129 | v9lstat->st_gid = stbuf->st_gid; | |
1130 | v9lstat->st_rdev = stbuf->st_rdev; | |
1131 | v9lstat->st_size = stbuf->st_size; | |
1132 | v9lstat->st_blksize = stbuf->st_blksize; | |
1133 | v9lstat->st_blocks = stbuf->st_blocks; | |
1134 | v9lstat->st_atime_sec = stbuf->st_atime; | |
1135 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
1136 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
1137 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
1138 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
1139 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
1140 | /* Currently we only support BASIC fields in stat */ | |
1141 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
1142 | ||
1143 | stat_to_qid(stbuf, &v9lstat->qid); | |
1144 | } | |
1145 | ||
1f5a89bf AL |
1146 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1147 | { | |
1148 | while (len && *iovcnt) { | |
1149 | if (len < sg->iov_len) { | |
1150 | sg->iov_len -= len; | |
1151 | sg->iov_base += len; | |
1152 | len = 0; | |
1153 | } else { | |
1154 | len -= sg->iov_len; | |
1155 | sg++; | |
1156 | *iovcnt -= 1; | |
1157 | } | |
1158 | } | |
1159 | ||
1160 | return sg; | |
1161 | } | |
1162 | ||
1163 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
1164 | { | |
1165 | int i; | |
1166 | int total = 0; | |
1167 | ||
1168 | for (i = 0; i < *cnt; i++) { | |
1169 | if ((total + sg[i].iov_len) > cap) { | |
1170 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
1171 | i++; | |
1172 | break; | |
1173 | } | |
1174 | total += sg[i].iov_len; | |
1175 | } | |
1176 | ||
1177 | *cnt = i; | |
1178 | ||
1179 | return sg; | |
1180 | } | |
1181 | ||
1182 | static void print_sg(struct iovec *sg, int cnt) | |
1183 | { | |
1184 | int i; | |
1185 | ||
1186 | printf("sg[%d]: {", cnt); | |
1187 | for (i = 0; i < cnt; i++) { | |
1188 | if (i) { | |
1189 | printf(", "); | |
1190 | } | |
1191 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1192 | } | |
1193 | printf("}\n"); | |
1194 | } | |
1195 | ||
2289be19 AK |
1196 | /* Will call this only for path name based fid */ |
1197 | static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) | |
8cf89e00 | 1198 | { |
2289be19 AK |
1199 | V9fsPath str; |
1200 | v9fs_path_init(&str); | |
1201 | v9fs_path_copy(&str, dst); | |
1202 | v9fs_string_sprintf((V9fsString *)dst, "%s%s", src->data, str.data+len); | |
1203 | v9fs_path_free(&str); | |
1204 | /* +1 to include terminating NULL */ | |
1205 | dst->size++; | |
8cf89e00 AL |
1206 | } |
1207 | ||
2c74c2cb MK |
1208 | static inline bool is_ro_export(FsContext *ctx) |
1209 | { | |
1210 | return ctx->export_flags & V9FS_RDONLY; | |
1211 | } | |
1212 | ||
ff06030f | 1213 | static void v9fs_version(void *opaque) |
9f107513 | 1214 | { |
ff06030f VJ |
1215 | V9fsPDU *pdu = opaque; |
1216 | V9fsState *s = pdu->s; | |
92c1ad03 AL |
1217 | V9fsString version; |
1218 | size_t offset = 7; | |
1219 | ||
5e94c103 | 1220 | pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); |
c572f23a | 1221 | trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); |
92c1ad03 | 1222 | |
b41e2992 DS |
1223 | virtfs_reset(pdu); |
1224 | ||
84151514 MK |
1225 | if (!strcmp(version.data, "9P2000.u")) { |
1226 | s->proto_version = V9FS_PROTO_2000U; | |
1227 | } else if (!strcmp(version.data, "9P2000.L")) { | |
1228 | s->proto_version = V9FS_PROTO_2000L; | |
1229 | } else { | |
92c1ad03 | 1230 | v9fs_string_sprintf(&version, "unknown"); |
9f107513 | 1231 | } |
92c1ad03 | 1232 | |
5e94c103 | 1233 | offset += pdu_marshal(pdu, offset, "ds", s->msize, &version); |
c572f23a HPB |
1234 | trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); |
1235 | ||
92c1ad03 AL |
1236 | complete_pdu(s, pdu, offset); |
1237 | ||
1238 | v9fs_string_free(&version); | |
ff06030f | 1239 | return; |
9f107513 AL |
1240 | } |
1241 | ||
ff06030f | 1242 | static void v9fs_attach(void *opaque) |
9f107513 | 1243 | { |
ff06030f VJ |
1244 | V9fsPDU *pdu = opaque; |
1245 | V9fsState *s = pdu->s; | |
955efc47 AL |
1246 | int32_t fid, afid, n_uname; |
1247 | V9fsString uname, aname; | |
1248 | V9fsFidState *fidp; | |
955efc47 | 1249 | size_t offset = 7; |
8c158561 | 1250 | V9fsQID qid; |
955efc47 AL |
1251 | ssize_t err; |
1252 | ||
1253 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
c572f23a | 1254 | trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); |
955efc47 AL |
1255 | |
1256 | fidp = alloc_fid(s, fid); | |
1257 | if (fidp == NULL) { | |
1258 | err = -EINVAL; | |
84dfb926 | 1259 | goto out_nofid; |
9f107513 | 1260 | } |
955efc47 | 1261 | fidp->uid = n_uname; |
bccacf6c | 1262 | err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); |
2289be19 AK |
1263 | if (err < 0) { |
1264 | err = -EINVAL; | |
1265 | clunk_fid(s, fid); | |
1266 | goto out; | |
1267 | } | |
bccacf6c | 1268 | err = fid_to_qid(pdu, fidp, &qid); |
8c158561 | 1269 | if (err < 0) { |
955efc47 | 1270 | err = -EINVAL; |
84dfb926 | 1271 | clunk_fid(s, fid); |
955efc47 AL |
1272 | goto out; |
1273 | } | |
955efc47 | 1274 | offset += pdu_marshal(pdu, offset, "Q", &qid); |
955efc47 | 1275 | err = offset; |
7999f7e1 AK |
1276 | trace_v9fs_attach_return(pdu->tag, pdu->id, |
1277 | qid.type, qid.version, qid.path); | |
e9a0152b AK |
1278 | s->root_fid = fid; |
1279 | /* disable migration */ | |
1280 | error_set(&s->migration_blocker, QERR_VIRTFS_FEATURE_BLOCKS_MIGRATION, | |
1281 | s->ctx.fs_root, s->tag); | |
1282 | migrate_add_blocker(s->migration_blocker); | |
955efc47 | 1283 | out: |
bccacf6c | 1284 | put_fid(pdu, fidp); |
84dfb926 | 1285 | out_nofid: |
955efc47 AL |
1286 | complete_pdu(s, pdu, err); |
1287 | v9fs_string_free(&uname); | |
1288 | v9fs_string_free(&aname); | |
9f107513 AL |
1289 | } |
1290 | ||
ff06030f | 1291 | static void v9fs_stat(void *opaque) |
9f107513 | 1292 | { |
4da7d3fa | 1293 | int32_t fid; |
d8e0c29e | 1294 | V9fsStat v9stat; |
4da7d3fa | 1295 | ssize_t err = 0; |
d8e0c29e AK |
1296 | size_t offset = 7; |
1297 | struct stat stbuf; | |
1298 | V9fsFidState *fidp; | |
1299 | V9fsPDU *pdu = opaque; | |
1300 | V9fsState *s = pdu->s; | |
4da7d3fa | 1301 | |
d8e0c29e | 1302 | pdu_unmarshal(pdu, offset, "d", &fid); |
c572f23a | 1303 | trace_v9fs_stat(pdu->tag, pdu->id, fid); |
84dfb926 | 1304 | |
bccacf6c | 1305 | fidp = get_fid(pdu, fid); |
d8e0c29e | 1306 | if (fidp == NULL) { |
4da7d3fa | 1307 | err = -ENOENT; |
84dfb926 | 1308 | goto out_nofid; |
9f107513 | 1309 | } |
bccacf6c | 1310 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
d8e0c29e AK |
1311 | if (err < 0) { |
1312 | goto out; | |
1313 | } | |
bccacf6c | 1314 | err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat); |
d8e0c29e AK |
1315 | if (err < 0) { |
1316 | goto out; | |
1317 | } | |
1318 | offset += pdu_marshal(pdu, offset, "wS", 0, &v9stat); | |
1319 | err = offset; | |
7999f7e1 AK |
1320 | trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, |
1321 | v9stat.atime, v9stat.mtime, v9stat.length); | |
d8e0c29e | 1322 | v9fs_stat_free(&v9stat); |
4da7d3fa | 1323 | out: |
bccacf6c | 1324 | put_fid(pdu, fidp); |
84dfb926 | 1325 | out_nofid: |
d8e0c29e | 1326 | complete_pdu(s, pdu, err); |
9f107513 AL |
1327 | } |
1328 | ||
ff06030f | 1329 | static void v9fs_getattr(void *opaque) |
00ede4c2 SK |
1330 | { |
1331 | int32_t fid; | |
8db21ce7 AK |
1332 | size_t offset = 7; |
1333 | ssize_t retval = 0; | |
1334 | struct stat stbuf; | |
00ede4c2 SK |
1335 | V9fsFidState *fidp; |
1336 | uint64_t request_mask; | |
8db21ce7 AK |
1337 | V9fsStatDotl v9stat_dotl; |
1338 | V9fsPDU *pdu = opaque; | |
1339 | V9fsState *s = pdu->s; | |
00ede4c2 | 1340 | |
8db21ce7 | 1341 | pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); |
c572f23a | 1342 | trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); |
00ede4c2 | 1343 | |
bccacf6c | 1344 | fidp = get_fid(pdu, fid); |
00ede4c2 | 1345 | if (fidp == NULL) { |
8db21ce7 | 1346 | retval = -ENOENT; |
84dfb926 | 1347 | goto out_nofid; |
00ede4c2 | 1348 | } |
8db21ce7 AK |
1349 | /* |
1350 | * Currently we only support BASIC fields in stat, so there is no | |
00ede4c2 SK |
1351 | * need to look at request_mask. |
1352 | */ | |
bccacf6c | 1353 | retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
8db21ce7 AK |
1354 | if (retval < 0) { |
1355 | goto out; | |
1356 | } | |
1357 | stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); | |
e06a765e HPB |
1358 | |
1359 | /* fill st_gen if requested and supported by underlying fs */ | |
1360 | if (request_mask & P9_STATS_GEN) { | |
1361 | retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); | |
1362 | if (retval < 0) { | |
1363 | goto out; | |
1364 | } | |
1365 | v9stat_dotl.st_result_mask |= P9_STATS_GEN; | |
1366 | } | |
8db21ce7 AK |
1367 | retval = offset; |
1368 | retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl); | |
c572f23a HPB |
1369 | trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, |
1370 | v9stat_dotl.st_mode, v9stat_dotl.st_uid, | |
1371 | v9stat_dotl.st_gid); | |
7999f7e1 AK |
1372 | out: |
1373 | put_fid(pdu, fidp); | |
1374 | out_nofid: | |
8db21ce7 | 1375 | complete_pdu(s, pdu, retval); |
00ede4c2 SK |
1376 | } |
1377 | ||
c79ce737 SK |
1378 | /* From Linux kernel code */ |
1379 | #define ATTR_MODE (1 << 0) | |
1380 | #define ATTR_UID (1 << 1) | |
1381 | #define ATTR_GID (1 << 2) | |
1382 | #define ATTR_SIZE (1 << 3) | |
1383 | #define ATTR_ATIME (1 << 4) | |
1384 | #define ATTR_MTIME (1 << 5) | |
1385 | #define ATTR_CTIME (1 << 6) | |
1386 | #define ATTR_MASK 127 | |
1387 | #define ATTR_ATIME_SET (1 << 7) | |
1388 | #define ATTR_MTIME_SET (1 << 8) | |
1389 | ||
65c05f9a | 1390 | static void v9fs_setattr(void *opaque) |
c79ce737 | 1391 | { |
65c05f9a AK |
1392 | int err = 0; |
1393 | int32_t fid; | |
1394 | V9fsFidState *fidp; | |
1395 | size_t offset = 7; | |
1396 | V9fsIattr v9iattr; | |
1397 | V9fsPDU *pdu = opaque; | |
1398 | V9fsState *s = pdu->s; | |
c79ce737 | 1399 | |
65c05f9a | 1400 | pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); |
c79ce737 | 1401 | |
bccacf6c | 1402 | fidp = get_fid(pdu, fid); |
65c05f9a AK |
1403 | if (fidp == NULL) { |
1404 | err = -EINVAL; | |
84dfb926 | 1405 | goto out_nofid; |
c79ce737 | 1406 | } |
65c05f9a | 1407 | if (v9iattr.valid & ATTR_MODE) { |
bccacf6c | 1408 | err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); |
65c05f9a AK |
1409 | if (err < 0) { |
1410 | goto out; | |
c79ce737 | 1411 | } |
c79ce737 | 1412 | } |
65c05f9a | 1413 | if (v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) { |
c79ce737 | 1414 | struct timespec times[2]; |
65c05f9a AK |
1415 | if (v9iattr.valid & ATTR_ATIME) { |
1416 | if (v9iattr.valid & ATTR_ATIME_SET) { | |
1417 | times[0].tv_sec = v9iattr.atime_sec; | |
1418 | times[0].tv_nsec = v9iattr.atime_nsec; | |
c79ce737 SK |
1419 | } else { |
1420 | times[0].tv_nsec = UTIME_NOW; | |
1421 | } | |
1422 | } else { | |
1423 | times[0].tv_nsec = UTIME_OMIT; | |
1424 | } | |
65c05f9a AK |
1425 | if (v9iattr.valid & ATTR_MTIME) { |
1426 | if (v9iattr.valid & ATTR_MTIME_SET) { | |
1427 | times[1].tv_sec = v9iattr.mtime_sec; | |
1428 | times[1].tv_nsec = v9iattr.mtime_nsec; | |
c79ce737 SK |
1429 | } else { |
1430 | times[1].tv_nsec = UTIME_NOW; | |
1431 | } | |
1432 | } else { | |
1433 | times[1].tv_nsec = UTIME_OMIT; | |
1434 | } | |
bccacf6c | 1435 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
65c05f9a AK |
1436 | if (err < 0) { |
1437 | goto out; | |
1438 | } | |
c79ce737 | 1439 | } |
65c05f9a AK |
1440 | /* |
1441 | * If the only valid entry in iattr is ctime we can call | |
1442 | * chown(-1,-1) to update the ctime of the file | |
1443 | */ | |
1444 | if ((v9iattr.valid & (ATTR_UID | ATTR_GID)) || | |
1445 | ((v9iattr.valid & ATTR_CTIME) | |
1446 | && !((v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { | |
1447 | if (!(v9iattr.valid & ATTR_UID)) { | |
1448 | v9iattr.uid = -1; | |
1449 | } | |
1450 | if (!(v9iattr.valid & ATTR_GID)) { | |
1451 | v9iattr.gid = -1; | |
1452 | } | |
bccacf6c | 1453 | err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, |
65c05f9a AK |
1454 | v9iattr.gid); |
1455 | if (err < 0) { | |
1456 | goto out; | |
1457 | } | |
c79ce737 | 1458 | } |
65c05f9a | 1459 | if (v9iattr.valid & (ATTR_SIZE)) { |
bccacf6c | 1460 | err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); |
65c05f9a AK |
1461 | if (err < 0) { |
1462 | goto out; | |
1463 | } | |
c79ce737 | 1464 | } |
65c05f9a | 1465 | err = offset; |
c79ce737 | 1466 | out: |
bccacf6c | 1467 | put_fid(pdu, fidp); |
84dfb926 | 1468 | out_nofid: |
65c05f9a | 1469 | complete_pdu(s, pdu, err); |
c79ce737 SK |
1470 | } |
1471 | ||
3cc19c0c | 1472 | static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) |
ff5e54c9 AL |
1473 | { |
1474 | int i; | |
3cc19c0c AK |
1475 | size_t offset = 7; |
1476 | offset += pdu_marshal(pdu, offset, "w", nwnames); | |
1477 | for (i = 0; i < nwnames; i++) { | |
1478 | offset += pdu_marshal(pdu, offset, "Q", &qids[i]); | |
ff5e54c9 | 1479 | } |
3cc19c0c | 1480 | return offset; |
ff5e54c9 AL |
1481 | } |
1482 | ||
ff06030f | 1483 | static void v9fs_walk(void *opaque) |
9f107513 | 1484 | { |
3cc19c0c AK |
1485 | int name_idx; |
1486 | V9fsQID *qids = NULL; | |
1487 | int i, err = 0; | |
2289be19 | 1488 | V9fsPath dpath, path; |
3cc19c0c AK |
1489 | uint16_t nwnames; |
1490 | struct stat stbuf; | |
1491 | size_t offset = 7; | |
1492 | int32_t fid, newfid; | |
1493 | V9fsString *wnames = NULL; | |
1494 | V9fsFidState *fidp; | |
84dfb926 | 1495 | V9fsFidState *newfidp = NULL;; |
ff06030f VJ |
1496 | V9fsPDU *pdu = opaque; |
1497 | V9fsState *s = pdu->s; | |
ff5e54c9 | 1498 | |
3cc19c0c AK |
1499 | offset += pdu_unmarshal(pdu, offset, "ddw", &fid, |
1500 | &newfid, &nwnames); | |
ff5e54c9 | 1501 | |
c572f23a HPB |
1502 | trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); |
1503 | ||
3cc19c0c AK |
1504 | if (nwnames && nwnames <= P9_MAXWELEM) { |
1505 | wnames = g_malloc0(sizeof(wnames[0]) * nwnames); | |
1506 | qids = g_malloc0(sizeof(qids[0]) * nwnames); | |
1507 | for (i = 0; i < nwnames; i++) { | |
1508 | offset += pdu_unmarshal(pdu, offset, "s", &wnames[i]); | |
ff5e54c9 | 1509 | } |
3cc19c0c | 1510 | } else if (nwnames > P9_MAXWELEM) { |
4f8dee2d | 1511 | err = -EINVAL; |
84dfb926 | 1512 | goto out_nofid; |
ff5e54c9 | 1513 | } |
bccacf6c | 1514 | fidp = get_fid(pdu, fid); |
3cc19c0c | 1515 | if (fidp == NULL) { |
ff5e54c9 | 1516 | err = -ENOENT; |
84dfb926 | 1517 | goto out_nofid; |
ff5e54c9 | 1518 | } |
2289be19 AK |
1519 | v9fs_path_init(&dpath); |
1520 | v9fs_path_init(&path); | |
1521 | /* | |
1522 | * Both dpath and path initially poin to fidp. | |
1523 | * Needed to handle request with nwnames == 0 | |
1524 | */ | |
1525 | v9fs_path_copy(&dpath, &fidp->path); | |
1526 | v9fs_path_copy(&path, &fidp->path); | |
1527 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
bccacf6c | 1528 | err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, &path); |
2289be19 AK |
1529 | if (err < 0) { |
1530 | goto out; | |
1531 | } | |
bccacf6c | 1532 | err = v9fs_co_lstat(pdu, &path, &stbuf); |
2289be19 AK |
1533 | if (err < 0) { |
1534 | goto out; | |
1535 | } | |
1536 | stat_to_qid(&stbuf, &qids[name_idx]); | |
1537 | v9fs_path_copy(&dpath, &path); | |
1538 | } | |
ff5e54c9 | 1539 | if (fid == newfid) { |
3cc19c0c | 1540 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
2289be19 | 1541 | v9fs_path_copy(&fidp->path, &path); |
ff5e54c9 | 1542 | } else { |
3cc19c0c AK |
1543 | newfidp = alloc_fid(s, newfid); |
1544 | if (newfidp == NULL) { | |
ff5e54c9 AL |
1545 | err = -EINVAL; |
1546 | goto out; | |
1547 | } | |
3cc19c0c | 1548 | newfidp->uid = fidp->uid; |
2289be19 | 1549 | v9fs_path_copy(&newfidp->path, &path); |
9f107513 | 1550 | } |
3cc19c0c | 1551 | err = v9fs_walk_marshal(pdu, nwnames, qids); |
7999f7e1 | 1552 | trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); |
ff5e54c9 | 1553 | out: |
bccacf6c | 1554 | put_fid(pdu, fidp); |
84dfb926 | 1555 | if (newfidp) { |
bccacf6c | 1556 | put_fid(pdu, newfidp); |
84dfb926 | 1557 | } |
2289be19 AK |
1558 | v9fs_path_free(&dpath); |
1559 | v9fs_path_free(&path); | |
84dfb926 | 1560 | out_nofid: |
3cc19c0c AK |
1561 | complete_pdu(s, pdu, err); |
1562 | if (nwnames && nwnames <= P9_MAXWELEM) { | |
1563 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
1564 | v9fs_string_free(&wnames[name_idx]); | |
1565 | } | |
1566 | g_free(wnames); | |
1567 | g_free(qids); | |
1568 | } | |
2289be19 | 1569 | return; |
9f107513 AL |
1570 | } |
1571 | ||
bccacf6c | 1572 | static int32_t get_iounit(V9fsPDU *pdu, V9fsPath *path) |
5e94c103 MK |
1573 | { |
1574 | struct statfs stbuf; | |
1575 | int32_t iounit = 0; | |
bccacf6c | 1576 | V9fsState *s = pdu->s; |
5e94c103 MK |
1577 | |
1578 | /* | |
1579 | * iounit should be multiples of f_bsize (host filesystem block size | |
1580 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1581 | */ | |
bccacf6c | 1582 | if (!v9fs_co_statfs(pdu, path, &stbuf)) { |
5e94c103 MK |
1583 | iounit = stbuf.f_bsize; |
1584 | iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; | |
1585 | } | |
5e94c103 MK |
1586 | if (!iounit) { |
1587 | iounit = s->msize - P9_IOHDRSZ; | |
1588 | } | |
1589 | return iounit; | |
1590 | } | |
1591 | ||
857bc158 | 1592 | static void v9fs_open(void *opaque) |
5e94c103 | 1593 | { |
857bc158 | 1594 | int flags; |
857bc158 AK |
1595 | int32_t fid; |
1596 | int32_t mode; | |
1597 | V9fsQID qid; | |
7999f7e1 | 1598 | int iounit = 0; |
857bc158 AK |
1599 | ssize_t err = 0; |
1600 | size_t offset = 7; | |
1601 | struct stat stbuf; | |
1602 | V9fsFidState *fidp; | |
1603 | V9fsPDU *pdu = opaque; | |
1604 | V9fsState *s = pdu->s; | |
5e94c103 | 1605 | |
857bc158 AK |
1606 | if (s->proto_version == V9FS_PROTO_2000L) { |
1607 | pdu_unmarshal(pdu, offset, "dd", &fid, &mode); | |
1608 | } else { | |
1609 | pdu_unmarshal(pdu, offset, "db", &fid, &mode); | |
1610 | } | |
c572f23a HPB |
1611 | trace_v9fs_open(pdu->tag, pdu->id, fid, mode); |
1612 | ||
bccacf6c | 1613 | fidp = get_fid(pdu, fid); |
857bc158 AK |
1614 | if (fidp == NULL) { |
1615 | err = -ENOENT; | |
84dfb926 | 1616 | goto out_nofid; |
a6568fe2 | 1617 | } |
857bc158 | 1618 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
a6568fe2 | 1619 | |
bccacf6c | 1620 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
857bc158 | 1621 | if (err < 0) { |
a6568fe2 AL |
1622 | goto out; |
1623 | } | |
857bc158 AK |
1624 | stat_to_qid(&stbuf, &qid); |
1625 | if (S_ISDIR(stbuf.st_mode)) { | |
bccacf6c | 1626 | err = v9fs_co_opendir(pdu, fidp); |
857bc158 AK |
1627 | if (err < 0) { |
1628 | goto out; | |
1629 | } | |
1630 | fidp->fid_type = P9_FID_DIR; | |
1631 | offset += pdu_marshal(pdu, offset, "Qd", &qid, 0); | |
1632 | err = offset; | |
a6568fe2 | 1633 | } else { |
771e9d4c | 1634 | if (s->proto_version == V9FS_PROTO_2000L) { |
d3ab98e6 | 1635 | flags = get_dotl_openflags(s, mode); |
771e9d4c | 1636 | } else { |
857bc158 | 1637 | flags = omode_to_uflags(mode); |
771e9d4c | 1638 | } |
2c74c2cb MK |
1639 | if (is_ro_export(&s->ctx)) { |
1640 | if (mode & O_WRONLY || mode & O_RDWR || | |
1641 | mode & O_APPEND || mode & O_TRUNC) { | |
1642 | err = -EROFS; | |
1643 | goto out; | |
1644 | } | |
1645 | flags |= O_NOATIME; | |
1646 | } | |
bccacf6c | 1647 | err = v9fs_co_open(pdu, fidp, flags); |
857bc158 AK |
1648 | if (err < 0) { |
1649 | goto out; | |
1650 | } | |
1651 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
1652 | fidp->open_flags = flags; |
1653 | if (flags & O_EXCL) { | |
1654 | /* | |
1655 | * We let the host file system do O_EXCL check | |
1656 | * We should not reclaim such fd | |
1657 | */ | |
1658 | fidp->flags |= FID_NON_RECLAIMABLE; | |
1659 | } | |
bccacf6c | 1660 | iounit = get_iounit(pdu, &fidp->path); |
857bc158 AK |
1661 | offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit); |
1662 | err = offset; | |
a6568fe2 | 1663 | } |
7999f7e1 AK |
1664 | trace_v9fs_open_return(pdu->tag, pdu->id, |
1665 | qid.type, qid.version, qid.path, iounit); | |
a6568fe2 | 1666 | out: |
bccacf6c | 1667 | put_fid(pdu, fidp); |
84dfb926 | 1668 | out_nofid: |
a6568fe2 | 1669 | complete_pdu(s, pdu, err); |
a6568fe2 AL |
1670 | } |
1671 | ||
ff06030f | 1672 | static void v9fs_lcreate(void *opaque) |
c1568af5 VJ |
1673 | { |
1674 | int32_t dfid, flags, mode; | |
1675 | gid_t gid; | |
c1568af5 | 1676 | ssize_t err = 0; |
36f8981f | 1677 | ssize_t offset = 7; |
36f8981f VJ |
1678 | V9fsString name; |
1679 | V9fsFidState *fidp; | |
1680 | struct stat stbuf; | |
1681 | V9fsQID qid; | |
1682 | int32_t iounit; | |
1683 | V9fsPDU *pdu = opaque; | |
c1568af5 | 1684 | |
36f8981f VJ |
1685 | pdu_unmarshal(pdu, offset, "dsddd", &dfid, &name, &flags, |
1686 | &mode, &gid); | |
c572f23a | 1687 | trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); |
c1568af5 | 1688 | |
bccacf6c | 1689 | fidp = get_fid(pdu, dfid); |
36f8981f | 1690 | if (fidp == NULL) { |
c1568af5 | 1691 | err = -ENOENT; |
84dfb926 | 1692 | goto out_nofid; |
c1568af5 | 1693 | } |
c1568af5 | 1694 | |
d3ab98e6 | 1695 | flags = get_dotl_openflags(pdu->s, flags); |
bccacf6c | 1696 | err = v9fs_co_open2(pdu, fidp, &name, gid, |
02cb7f3a | 1697 | flags | O_CREAT, mode, &stbuf); |
36f8981f VJ |
1698 | if (err < 0) { |
1699 | goto out; | |
1700 | } | |
1701 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
1702 | fidp->open_flags = flags; |
1703 | if (flags & O_EXCL) { | |
1704 | /* | |
1705 | * We let the host file system do O_EXCL check | |
1706 | * We should not reclaim such fd | |
1707 | */ | |
1708 | fidp->flags |= FID_NON_RECLAIMABLE; | |
1709 | } | |
bccacf6c | 1710 | iounit = get_iounit(pdu, &fidp->path); |
36f8981f VJ |
1711 | stat_to_qid(&stbuf, &qid); |
1712 | offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit); | |
1713 | err = offset; | |
7999f7e1 AK |
1714 | trace_v9fs_lcreate_return(pdu->tag, pdu->id, |
1715 | qid.type, qid.version, qid.path, iounit); | |
c1568af5 | 1716 | out: |
bccacf6c | 1717 | put_fid(pdu, fidp); |
84dfb926 | 1718 | out_nofid: |
36f8981f VJ |
1719 | complete_pdu(pdu->s, pdu, err); |
1720 | v9fs_string_free(&name); | |
c1568af5 VJ |
1721 | } |
1722 | ||
ff06030f | 1723 | static void v9fs_fsync(void *opaque) |
b41e95d3 | 1724 | { |
4e9ad444 | 1725 | int err; |
b41e95d3 | 1726 | int32_t fid; |
4e9ad444 | 1727 | int datasync; |
b41e95d3 VJ |
1728 | size_t offset = 7; |
1729 | V9fsFidState *fidp; | |
4e9ad444 AK |
1730 | V9fsPDU *pdu = opaque; |
1731 | V9fsState *s = pdu->s; | |
b41e95d3 | 1732 | |
49594973 | 1733 | pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); |
c572f23a HPB |
1734 | trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); |
1735 | ||
bccacf6c | 1736 | fidp = get_fid(pdu, fid); |
b41e95d3 VJ |
1737 | if (fidp == NULL) { |
1738 | err = -ENOENT; | |
84dfb926 | 1739 | goto out_nofid; |
b41e95d3 | 1740 | } |
bccacf6c | 1741 | err = v9fs_co_fsync(pdu, fidp, datasync); |
4e9ad444 AK |
1742 | if (!err) { |
1743 | err = offset; | |
1744 | } | |
bccacf6c | 1745 | put_fid(pdu, fidp); |
84dfb926 | 1746 | out_nofid: |
4e9ad444 | 1747 | complete_pdu(s, pdu, err); |
b41e95d3 VJ |
1748 | } |
1749 | ||
ff06030f | 1750 | static void v9fs_clunk(void *opaque) |
a6568fe2 | 1751 | { |
c540ee51 | 1752 | int err; |
bbd5697b AL |
1753 | int32_t fid; |
1754 | size_t offset = 7; | |
84dfb926 | 1755 | V9fsFidState *fidp; |
c540ee51 AK |
1756 | V9fsPDU *pdu = opaque; |
1757 | V9fsState *s = pdu->s; | |
bbd5697b AL |
1758 | |
1759 | pdu_unmarshal(pdu, offset, "d", &fid); | |
c572f23a | 1760 | trace_v9fs_clunk(pdu->tag, pdu->id, fid); |
84dfb926 | 1761 | |
ce421a19 | 1762 | fidp = clunk_fid(s, fid); |
84dfb926 AK |
1763 | if (fidp == NULL) { |
1764 | err = -ENOENT; | |
1765 | goto out_nofid; | |
1766 | } | |
ce421a19 AK |
1767 | /* |
1768 | * Bump the ref so that put_fid will | |
1769 | * free the fid. | |
1770 | */ | |
1771 | fidp->ref++; | |
bbd5697b | 1772 | err = offset; |
ce421a19 | 1773 | |
bccacf6c | 1774 | put_fid(pdu, fidp); |
84dfb926 | 1775 | out_nofid: |
bbd5697b | 1776 | complete_pdu(s, pdu, err); |
9f107513 AL |
1777 | } |
1778 | ||
d208a0e0 AK |
1779 | static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, |
1780 | V9fsFidState *fidp, int64_t off, int32_t max_count) | |
a9231555 | 1781 | { |
d208a0e0 AK |
1782 | size_t offset = 7; |
1783 | int read_count; | |
1784 | int64_t xattr_len; | |
a9231555 | 1785 | |
d208a0e0 AK |
1786 | xattr_len = fidp->fs.xattr.len; |
1787 | read_count = xattr_len - off; | |
1788 | if (read_count > max_count) { | |
1789 | read_count = max_count; | |
1790 | } else if (read_count < 0) { | |
1791 | /* | |
1792 | * read beyond XATTR value | |
1793 | */ | |
1794 | read_count = 0; | |
a9231555 | 1795 | } |
d208a0e0 AK |
1796 | offset += pdu_marshal(pdu, offset, "d", read_count); |
1797 | offset += pdu_pack(pdu, offset, | |
1798 | ((char *)fidp->fs.xattr.value) + off, | |
1799 | read_count); | |
1800 | return offset; | |
a9231555 AL |
1801 | } |
1802 | ||
bccacf6c | 1803 | static int v9fs_do_readdir_with_stat(V9fsPDU *pdu, |
d208a0e0 | 1804 | V9fsFidState *fidp, int32_t max_count) |
a9231555 | 1805 | { |
2289be19 | 1806 | V9fsPath path; |
d208a0e0 AK |
1807 | V9fsStat v9stat; |
1808 | int len, err = 0; | |
1809 | int32_t count = 0; | |
1810 | struct stat stbuf; | |
1811 | off_t saved_dir_pos; | |
5f524c1e | 1812 | struct dirent *dent, *result; |
a9231555 | 1813 | |
d208a0e0 | 1814 | /* save the directory position */ |
bccacf6c | 1815 | saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
d208a0e0 AK |
1816 | if (saved_dir_pos < 0) { |
1817 | return saved_dir_pos; | |
a9231555 | 1818 | } |
5f524c1e HPB |
1819 | |
1820 | dent = g_malloc(sizeof(struct dirent)); | |
1821 | ||
d208a0e0 | 1822 | while (1) { |
2289be19 | 1823 | v9fs_path_init(&path); |
bccacf6c | 1824 | err = v9fs_co_readdir_r(pdu, fidp, dent, &result); |
5f524c1e | 1825 | if (err || !result) { |
d208a0e0 AK |
1826 | break; |
1827 | } | |
bccacf6c | 1828 | err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); |
d208a0e0 AK |
1829 | if (err < 0) { |
1830 | goto out; | |
1831 | } | |
bccacf6c | 1832 | err = v9fs_co_lstat(pdu, &path, &stbuf); |
2289be19 AK |
1833 | if (err < 0) { |
1834 | goto out; | |
1835 | } | |
bccacf6c | 1836 | err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat); |
d208a0e0 AK |
1837 | if (err < 0) { |
1838 | goto out; | |
a9231555 | 1839 | } |
d208a0e0 AK |
1840 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
1841 | len = pdu_marshal(pdu, 11 + count, "S", &v9stat); | |
1842 | if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) { | |
1843 | /* Ran out of buffer. Set dir back to old position and return */ | |
bccacf6c | 1844 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
d208a0e0 | 1845 | v9fs_stat_free(&v9stat); |
2289be19 | 1846 | v9fs_path_free(&path); |
5f524c1e | 1847 | g_free(dent); |
d208a0e0 AK |
1848 | return count; |
1849 | } | |
1850 | count += len; | |
1851 | v9fs_stat_free(&v9stat); | |
2289be19 | 1852 | v9fs_path_free(&path); |
d208a0e0 | 1853 | saved_dir_pos = dent->d_off; |
a9231555 | 1854 | } |
a9231555 | 1855 | out: |
5f524c1e | 1856 | g_free(dent); |
2289be19 | 1857 | v9fs_path_free(&path); |
d208a0e0 AK |
1858 | if (err < 0) { |
1859 | return err; | |
fa32ef88 | 1860 | } |
d208a0e0 | 1861 | return count; |
fa32ef88 AK |
1862 | } |
1863 | ||
ff06030f | 1864 | static void v9fs_read(void *opaque) |
9f107513 | 1865 | { |
a9231555 | 1866 | int32_t fid; |
d208a0e0 | 1867 | int64_t off; |
a9231555 | 1868 | ssize_t err = 0; |
d208a0e0 AK |
1869 | int32_t count = 0; |
1870 | size_t offset = 7; | |
1871 | int32_t max_count; | |
1872 | V9fsFidState *fidp; | |
1873 | V9fsPDU *pdu = opaque; | |
1874 | V9fsState *s = pdu->s; | |
a9231555 | 1875 | |
d208a0e0 | 1876 | pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); |
c572f23a | 1877 | trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); |
84dfb926 | 1878 | |
bccacf6c | 1879 | fidp = get_fid(pdu, fid); |
d208a0e0 | 1880 | if (fidp == NULL) { |
a9231555 | 1881 | err = -EINVAL; |
84dfb926 | 1882 | goto out_nofid; |
a9231555 | 1883 | } |
d208a0e0 | 1884 | if (fidp->fid_type == P9_FID_DIR) { |
a9231555 | 1885 | |
d208a0e0 | 1886 | if (off == 0) { |
bccacf6c | 1887 | v9fs_co_rewinddir(pdu, fidp); |
a9231555 | 1888 | } |
bccacf6c | 1889 | count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); |
d208a0e0 AK |
1890 | if (count < 0) { |
1891 | err = count; | |
1892 | goto out; | |
56d15a53 | 1893 | } |
d208a0e0 AK |
1894 | err = offset; |
1895 | err += pdu_marshal(pdu, offset, "d", count); | |
1896 | err += count; | |
1897 | } else if (fidp->fid_type == P9_FID_FILE) { | |
1898 | int32_t cnt; | |
1899 | int32_t len; | |
1900 | struct iovec *sg; | |
1901 | struct iovec iov[128]; /* FIXME: bad, bad, bad */ | |
1902 | ||
1903 | sg = iov; | |
1904 | pdu_marshal(pdu, offset + 4, "v", sg, &cnt); | |
1905 | sg = cap_sg(sg, max_count, &cnt); | |
1906 | do { | |
1907 | if (0) { | |
1908 | print_sg(sg, cnt); | |
1909 | } | |
1910 | /* Loop in case of EINTR */ | |
1911 | do { | |
bccacf6c | 1912 | len = v9fs_co_preadv(pdu, fidp, sg, cnt, off); |
d208a0e0 AK |
1913 | if (len >= 0) { |
1914 | off += len; | |
1915 | count += len; | |
1916 | } | |
bccacf6c | 1917 | } while (len == -EINTR && !pdu->cancelled); |
d208a0e0 AK |
1918 | if (len < 0) { |
1919 | /* IO error return the error */ | |
1920 | err = len; | |
1921 | goto out; | |
1922 | } | |
1923 | sg = adjust_sg(sg, len, &cnt); | |
1924 | } while (count < max_count && len > 0); | |
1925 | err = offset; | |
1926 | err += pdu_marshal(pdu, offset, "d", count); | |
1927 | err += count; | |
1928 | } else if (fidp->fid_type == P9_FID_XATTR) { | |
1929 | err = v9fs_xattr_read(s, pdu, fidp, off, max_count); | |
a9231555 AL |
1930 | } else { |
1931 | err = -EINVAL; | |
9f107513 | 1932 | } |
7999f7e1 | 1933 | trace_v9fs_read_return(pdu->tag, pdu->id, count, err); |
a9231555 | 1934 | out: |
bccacf6c | 1935 | put_fid(pdu, fidp); |
84dfb926 | 1936 | out_nofid: |
a9231555 | 1937 | complete_pdu(s, pdu, err); |
9f107513 AL |
1938 | } |
1939 | ||
5e4eaa79 | 1940 | static size_t v9fs_readdir_data_size(V9fsString *name) |
c18e2f94 | 1941 | { |
5e4eaa79 AK |
1942 | /* |
1943 | * Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
1944 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
1945 | */ | |
1946 | return 24 + v9fs_string_size(name); | |
c18e2f94 SK |
1947 | } |
1948 | ||
bccacf6c | 1949 | static int v9fs_do_readdir(V9fsPDU *pdu, |
5e4eaa79 | 1950 | V9fsFidState *fidp, int32_t max_count) |
c18e2f94 | 1951 | { |
c18e2f94 | 1952 | size_t size; |
5e4eaa79 AK |
1953 | V9fsQID qid; |
1954 | V9fsString name; | |
1955 | int len, err = 0; | |
1956 | int32_t count = 0; | |
1957 | off_t saved_dir_pos; | |
5f524c1e | 1958 | struct dirent *dent, *result; |
c18e2f94 | 1959 | |
5e4eaa79 | 1960 | /* save the directory position */ |
bccacf6c | 1961 | saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
5e4eaa79 AK |
1962 | if (saved_dir_pos < 0) { |
1963 | return saved_dir_pos; | |
1964 | } | |
5f524c1e HPB |
1965 | |
1966 | dent = g_malloc(sizeof(struct dirent)); | |
1967 | ||
5e4eaa79 | 1968 | while (1) { |
bccacf6c | 1969 | err = v9fs_co_readdir_r(pdu, fidp, dent, &result); |
5f524c1e | 1970 | if (err || !result) { |
5e4eaa79 AK |
1971 | break; |
1972 | } | |
1973 | v9fs_string_init(&name); | |
1974 | v9fs_string_sprintf(&name, "%s", dent->d_name); | |
1975 | if ((count + v9fs_readdir_data_size(&name)) > max_count) { | |
c18e2f94 | 1976 | /* Ran out of buffer. Set dir back to old position and return */ |
bccacf6c | 1977 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
5e4eaa79 | 1978 | v9fs_string_free(&name); |
5f524c1e | 1979 | g_free(dent); |
5e4eaa79 | 1980 | return count; |
c18e2f94 | 1981 | } |
5e4eaa79 AK |
1982 | /* |
1983 | * Fill up just the path field of qid because the client uses | |
c18e2f94 SK |
1984 | * only that. To fill the entire qid structure we will have |
1985 | * to stat each dirent found, which is expensive | |
1986 | */ | |
5e4eaa79 AK |
1987 | size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); |
1988 | memcpy(&qid.path, &dent->d_ino, size); | |
c18e2f94 | 1989 | /* Fill the other fields with dummy values */ |
5e4eaa79 AK |
1990 | qid.type = 0; |
1991 | qid.version = 0; | |
c18e2f94 | 1992 | |
5e4eaa79 AK |
1993 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
1994 | len = pdu_marshal(pdu, 11 + count, "Qqbs", | |
1995 | &qid, dent->d_off, | |
1996 | dent->d_type, &name); | |
1997 | count += len; | |
1998 | v9fs_string_free(&name); | |
1999 | saved_dir_pos = dent->d_off; | |
2000 | } | |
5f524c1e | 2001 | g_free(dent); |
5e4eaa79 AK |
2002 | if (err < 0) { |
2003 | return err; | |
2004 | } | |
2005 | return count; | |
c18e2f94 SK |
2006 | } |
2007 | ||
ff06030f | 2008 | static void v9fs_readdir(void *opaque) |
c18e2f94 SK |
2009 | { |
2010 | int32_t fid; | |
5e4eaa79 AK |
2011 | V9fsFidState *fidp; |
2012 | ssize_t retval = 0; | |
c18e2f94 | 2013 | size_t offset = 7; |
5e4eaa79 AK |
2014 | int64_t initial_offset; |
2015 | int32_t count, max_count; | |
2016 | V9fsPDU *pdu = opaque; | |
2017 | V9fsState *s = pdu->s; | |
c18e2f94 | 2018 | |
5e4eaa79 | 2019 | pdu_unmarshal(pdu, offset, "dqd", &fid, &initial_offset, &max_count); |
c18e2f94 | 2020 | |
c572f23a HPB |
2021 | trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); |
2022 | ||
bccacf6c | 2023 | fidp = get_fid(pdu, fid); |
84dfb926 AK |
2024 | if (fidp == NULL) { |
2025 | retval = -EINVAL; | |
2026 | goto out_nofid; | |
2027 | } | |
2028 | if (!fidp->fs.dir) { | |
5e4eaa79 | 2029 | retval = -EINVAL; |
c18e2f94 SK |
2030 | goto out; |
2031 | } | |
5e4eaa79 | 2032 | if (initial_offset == 0) { |
bccacf6c | 2033 | v9fs_co_rewinddir(pdu, fidp); |
c18e2f94 | 2034 | } else { |
bccacf6c | 2035 | v9fs_co_seekdir(pdu, fidp, initial_offset); |
c18e2f94 | 2036 | } |
bccacf6c | 2037 | count = v9fs_do_readdir(pdu, fidp, max_count); |
5e4eaa79 AK |
2038 | if (count < 0) { |
2039 | retval = count; | |
2040 | goto out; | |
2041 | } | |
2042 | retval = offset; | |
2043 | retval += pdu_marshal(pdu, offset, "d", count); | |
2044 | retval += count; | |
7999f7e1 | 2045 | trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); |
c18e2f94 | 2046 | out: |
bccacf6c | 2047 | put_fid(pdu, fidp); |
84dfb926 | 2048 | out_nofid: |
5e4eaa79 | 2049 | complete_pdu(s, pdu, retval); |
c18e2f94 SK |
2050 | } |
2051 | ||
d7a90491 AK |
2052 | static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
2053 | int64_t off, int32_t count, | |
2054 | struct iovec *sg, int cnt) | |
10b468bd AK |
2055 | { |
2056 | int i, to_copy; | |
2057 | ssize_t err = 0; | |
2058 | int write_count; | |
2059 | int64_t xattr_len; | |
d7a90491 | 2060 | size_t offset = 7; |
10b468bd | 2061 | |
d7a90491 AK |
2062 | |
2063 | xattr_len = fidp->fs.xattr.len; | |
2064 | write_count = xattr_len - off; | |
2065 | if (write_count > count) { | |
2066 | write_count = count; | |
10b468bd AK |
2067 | } else if (write_count < 0) { |
2068 | /* | |
2069 | * write beyond XATTR value len specified in | |
2070 | * xattrcreate | |
2071 | */ | |
2072 | err = -ENOSPC; | |
2073 | goto out; | |
2074 | } | |
d7a90491 AK |
2075 | offset += pdu_marshal(pdu, offset, "d", write_count); |
2076 | err = offset; | |
2077 | fidp->fs.xattr.copied_len += write_count; | |
10b468bd AK |
2078 | /* |
2079 | * Now copy the content from sg list | |
2080 | */ | |
d7a90491 AK |
2081 | for (i = 0; i < cnt; i++) { |
2082 | if (write_count > sg[i].iov_len) { | |
2083 | to_copy = sg[i].iov_len; | |
10b468bd AK |
2084 | } else { |
2085 | to_copy = write_count; | |
2086 | } | |
d7a90491 | 2087 | memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); |
10b468bd | 2088 | /* updating vs->off since we are not using below */ |
d7a90491 | 2089 | off += to_copy; |
10b468bd AK |
2090 | write_count -= to_copy; |
2091 | } | |
2092 | out: | |
d7a90491 | 2093 | return err; |
10b468bd AK |
2094 | } |
2095 | ||
ff06030f | 2096 | static void v9fs_write(void *opaque) |
9f107513 | 2097 | { |
d7a90491 AK |
2098 | int cnt; |
2099 | ssize_t err; | |
2100 | int32_t fid; | |
2101 | int64_t off; | |
2102 | int32_t count; | |
2103 | int32_t len = 0; | |
2104 | int32_t total = 0; | |
2105 | size_t offset = 7; | |
2106 | V9fsFidState *fidp; | |
2107 | struct iovec iov[128]; /* FIXME: bad, bad, bad */ | |
2108 | struct iovec *sg = iov; | |
ff06030f VJ |
2109 | V9fsPDU *pdu = opaque; |
2110 | V9fsState *s = pdu->s; | |
8449360c | 2111 | |
d7a90491 | 2112 | pdu_unmarshal(pdu, offset, "dqdv", &fid, &off, &count, sg, &cnt); |
c572f23a | 2113 | trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, cnt); |
84dfb926 | 2114 | |
bccacf6c | 2115 | fidp = get_fid(pdu, fid); |
d7a90491 | 2116 | if (fidp == NULL) { |
8449360c | 2117 | err = -EINVAL; |
84dfb926 | 2118 | goto out_nofid; |
9f107513 | 2119 | } |
d7a90491 AK |
2120 | if (fidp->fid_type == P9_FID_FILE) { |
2121 | if (fidp->fs.fd == -1) { | |
10b468bd AK |
2122 | err = -EINVAL; |
2123 | goto out; | |
2124 | } | |
d7a90491 | 2125 | } else if (fidp->fid_type == P9_FID_XATTR) { |
10b468bd AK |
2126 | /* |
2127 | * setxattr operation | |
2128 | */ | |
d7a90491 AK |
2129 | err = v9fs_xattr_write(s, pdu, fidp, off, count, sg, cnt); |
2130 | goto out; | |
10b468bd | 2131 | } else { |
8449360c AL |
2132 | err = -EINVAL; |
2133 | goto out; | |
2134 | } | |
d7a90491 AK |
2135 | sg = cap_sg(sg, count, &cnt); |
2136 | do { | |
2137 | if (0) { | |
2138 | print_sg(sg, cnt); | |
56d15a53 | 2139 | } |
d7a90491 AK |
2140 | /* Loop in case of EINTR */ |
2141 | do { | |
bccacf6c | 2142 | len = v9fs_co_pwritev(pdu, fidp, sg, cnt, off); |
d7a90491 AK |
2143 | if (len >= 0) { |
2144 | off += len; | |
2145 | total += len; | |
2146 | } | |
bccacf6c | 2147 | } while (len == -EINTR && !pdu->cancelled); |
d7a90491 AK |
2148 | if (len < 0) { |
2149 | /* IO error return the error */ | |
2150 | err = len; | |
2151 | goto out; | |
2152 | } | |
2153 | sg = adjust_sg(sg, len, &cnt); | |
2154 | } while (total < count && len > 0); | |
2155 | offset += pdu_marshal(pdu, offset, "d", total); | |
2156 | err = offset; | |
7999f7e1 | 2157 | trace_v9fs_write_return(pdu->tag, pdu->id, total, err); |
8449360c | 2158 | out: |
bccacf6c | 2159 | put_fid(pdu, fidp); |
84dfb926 | 2160 | out_nofid: |
d7a90491 | 2161 | complete_pdu(s, pdu, err); |
9f107513 AL |
2162 | } |
2163 | ||
baaa86d9 | 2164 | static void v9fs_create(void *opaque) |
5e94c103 | 2165 | { |
baaa86d9 VJ |
2166 | int32_t fid; |
2167 | int err = 0; | |
2168 | size_t offset = 7; | |
2169 | V9fsFidState *fidp; | |
2170 | V9fsQID qid; | |
2171 | int32_t perm; | |
2172 | int8_t mode; | |
2289be19 | 2173 | V9fsPath path; |
baaa86d9 VJ |
2174 | struct stat stbuf; |
2175 | V9fsString name; | |
2176 | V9fsString extension; | |
baaa86d9 VJ |
2177 | int iounit; |
2178 | V9fsPDU *pdu = opaque; | |
c494dd6f | 2179 | |
2289be19 | 2180 | v9fs_path_init(&path); |
c494dd6f | 2181 | |
baaa86d9 VJ |
2182 | pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, |
2183 | &perm, &mode, &extension); | |
c494dd6f | 2184 | |
c572f23a HPB |
2185 | trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); |
2186 | ||
bccacf6c | 2187 | fidp = get_fid(pdu, fid); |
baaa86d9 VJ |
2188 | if (fidp == NULL) { |
2189 | err = -EINVAL; | |
84dfb926 | 2190 | goto out_nofid; |
c494dd6f | 2191 | } |
baaa86d9 | 2192 | if (perm & P9_STAT_MODE_DIR) { |
bccacf6c | 2193 | err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, |
02cb7f3a | 2194 | fidp->uid, -1, &stbuf); |
baaa86d9 VJ |
2195 | if (err < 0) { |
2196 | goto out; | |
2197 | } | |
bccacf6c | 2198 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2199 | if (err < 0) { |
2200 | goto out; | |
2201 | } | |
2202 | v9fs_path_copy(&fidp->path, &path); | |
bccacf6c | 2203 | err = v9fs_co_opendir(pdu, fidp); |
baaa86d9 VJ |
2204 | if (err < 0) { |
2205 | goto out; | |
2206 | } | |
2207 | fidp->fid_type = P9_FID_DIR; | |
2208 | } else if (perm & P9_STAT_MODE_SYMLINK) { | |
bccacf6c | 2209 | err = v9fs_co_symlink(pdu, fidp, &name, |
02cb7f3a | 2210 | extension.data, -1 , &stbuf); |
baaa86d9 | 2211 | if (err < 0) { |
baaa86d9 VJ |
2212 | goto out; |
2213 | } | |
bccacf6c | 2214 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2215 | if (err < 0) { |
2216 | goto out; | |
2217 | } | |
2218 | v9fs_path_copy(&fidp->path, &path); | |
baaa86d9 | 2219 | } else if (perm & P9_STAT_MODE_LINK) { |
2289be19 | 2220 | int32_t ofid = atoi(extension.data); |
bccacf6c | 2221 | V9fsFidState *ofidp = get_fid(pdu, ofid); |
2289be19 | 2222 | if (ofidp == NULL) { |
baaa86d9 VJ |
2223 | err = -EINVAL; |
2224 | goto out; | |
2225 | } | |
bccacf6c AK |
2226 | err = v9fs_co_link(pdu, ofidp, fidp, &name); |
2227 | put_fid(pdu, ofidp); | |
2289be19 AK |
2228 | if (err < 0) { |
2229 | goto out; | |
2230 | } | |
bccacf6c | 2231 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
baaa86d9 | 2232 | if (err < 0) { |
2289be19 | 2233 | fidp->fid_type = P9_FID_NONE; |
baaa86d9 | 2234 | goto out; |
c494dd6f | 2235 | } |
2289be19 | 2236 | v9fs_path_copy(&fidp->path, &path); |
bccacf6c | 2237 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
02cb7f3a AK |
2238 | if (err < 0) { |
2239 | fidp->fid_type = P9_FID_NONE; | |
2240 | goto out; | |
2241 | } | |
baaa86d9 | 2242 | } else if (perm & P9_STAT_MODE_DEVICE) { |
c494dd6f AL |
2243 | char ctype; |
2244 | uint32_t major, minor; | |
2245 | mode_t nmode = 0; | |
2246 | ||
baaa86d9 | 2247 | if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { |
c494dd6f | 2248 | err = -errno; |
baaa86d9 | 2249 | goto out; |
c494dd6f AL |
2250 | } |
2251 | ||
2252 | switch (ctype) { | |
2253 | case 'c': | |
2254 | nmode = S_IFCHR; | |
2255 | break; | |
2256 | case 'b': | |
2257 | nmode = S_IFBLK; | |
2258 | break; | |
2259 | default: | |
2260 | err = -EIO; | |
baaa86d9 VJ |
2261 | goto out; |
2262 | } | |
c1568af5 | 2263 | |
baaa86d9 | 2264 | nmode |= perm & 0777; |
bccacf6c | 2265 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2266 | makedev(major, minor), nmode, &stbuf); |
baaa86d9 VJ |
2267 | if (err < 0) { |
2268 | goto out; | |
2269 | } | |
bccacf6c | 2270 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2271 | if (err < 0) { |
2272 | goto out; | |
2273 | } | |
2274 | v9fs_path_copy(&fidp->path, &path); | |
baaa86d9 | 2275 | } else if (perm & P9_STAT_MODE_NAMED_PIPE) { |
bccacf6c | 2276 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2277 | 0, S_IFIFO | (perm & 0777), &stbuf); |
baaa86d9 VJ |
2278 | if (err < 0) { |
2279 | goto out; | |
2280 | } | |
bccacf6c | 2281 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2282 | if (err < 0) { |
2283 | goto out; | |
2284 | } | |
2285 | v9fs_path_copy(&fidp->path, &path); | |
baaa86d9 | 2286 | } else if (perm & P9_STAT_MODE_SOCKET) { |
bccacf6c | 2287 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
02cb7f3a | 2288 | 0, S_IFSOCK | (perm & 0777), &stbuf); |
baaa86d9 VJ |
2289 | if (err < 0) { |
2290 | goto out; | |
2291 | } | |
bccacf6c | 2292 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2289be19 AK |
2293 | if (err < 0) { |
2294 | goto out; | |
2295 | } | |
2296 | v9fs_path_copy(&fidp->path, &path); | |
baaa86d9 | 2297 | } else { |
bccacf6c | 2298 | err = v9fs_co_open2(pdu, fidp, &name, -1, |
02cb7f3a | 2299 | omode_to_uflags(mode)|O_CREAT, perm, &stbuf); |
baaa86d9 VJ |
2300 | if (err < 0) { |
2301 | goto out; | |
2302 | } | |
2303 | fidp->fid_type = P9_FID_FILE; | |
7a462745 AK |
2304 | fidp->open_flags = omode_to_uflags(mode); |
2305 | if (fidp->open_flags & O_EXCL) { | |
2306 | /* | |
2307 | * We let the host file system do O_EXCL check | |
2308 | * We should not reclaim such fd | |
2309 | */ | |
2310 | fidp->flags |= FID_NON_RECLAIMABLE; | |
2311 | } | |
c494dd6f | 2312 | } |
bccacf6c | 2313 | iounit = get_iounit(pdu, &fidp->path); |
baaa86d9 VJ |
2314 | stat_to_qid(&stbuf, &qid); |
2315 | offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit); | |
2316 | err = offset; | |
7999f7e1 AK |
2317 | trace_v9fs_create_return(pdu->tag, pdu->id, |
2318 | qid.type, qid.version, qid.path, iounit); | |
c494dd6f | 2319 | out: |
bccacf6c | 2320 | put_fid(pdu, fidp); |
84dfb926 | 2321 | out_nofid: |
baaa86d9 VJ |
2322 | complete_pdu(pdu->s, pdu, err); |
2323 | v9fs_string_free(&name); | |
2324 | v9fs_string_free(&extension); | |
2289be19 | 2325 | v9fs_path_free(&path); |
9f107513 AL |
2326 | } |
2327 | ||
ff06030f | 2328 | static void v9fs_symlink(void *opaque) |
08c60fc9 | 2329 | { |
ff06030f | 2330 | V9fsPDU *pdu = opaque; |
3fa2a8d1 VJ |
2331 | V9fsString name; |
2332 | V9fsString symname; | |
3fa2a8d1 VJ |
2333 | V9fsFidState *dfidp; |
2334 | V9fsQID qid; | |
2335 | struct stat stbuf; | |
08c60fc9 | 2336 | int32_t dfid; |
08c60fc9 VJ |
2337 | int err = 0; |
2338 | gid_t gid; | |
3fa2a8d1 | 2339 | size_t offset = 7; |
08c60fc9 | 2340 | |
3fa2a8d1 | 2341 | pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); |
c572f23a | 2342 | trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); |
08c60fc9 | 2343 | |
bccacf6c | 2344 | dfidp = get_fid(pdu, dfid); |
3fa2a8d1 | 2345 | if (dfidp == NULL) { |
08c60fc9 | 2346 | err = -EINVAL; |
84dfb926 | 2347 | goto out_nofid; |
08c60fc9 | 2348 | } |
bccacf6c | 2349 | err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); |
3fa2a8d1 VJ |
2350 | if (err < 0) { |
2351 | goto out; | |
2352 | } | |
2353 | stat_to_qid(&stbuf, &qid); | |
2354 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
2355 | err = offset; | |
7999f7e1 AK |
2356 | trace_v9fs_symlink_return(pdu->tag, pdu->id, |
2357 | qid.type, qid.version, qid.path); | |
08c60fc9 | 2358 | out: |
bccacf6c | 2359 | put_fid(pdu, dfidp); |
84dfb926 | 2360 | out_nofid: |
3fa2a8d1 VJ |
2361 | complete_pdu(pdu->s, pdu, err); |
2362 | v9fs_string_free(&name); | |
2363 | v9fs_string_free(&symname); | |
08c60fc9 VJ |
2364 | } |
2365 | ||
ff06030f | 2366 | static void v9fs_flush(void *opaque) |
9f107513 | 2367 | { |
bccacf6c AK |
2368 | int16_t tag; |
2369 | size_t offset = 7; | |
2370 | V9fsPDU *cancel_pdu; | |
ff06030f VJ |
2371 | V9fsPDU *pdu = opaque; |
2372 | V9fsState *s = pdu->s; | |
bccacf6c AK |
2373 | |
2374 | pdu_unmarshal(pdu, offset, "w", &tag); | |
c572f23a | 2375 | trace_v9fs_flush(pdu->tag, pdu->id, tag); |
bccacf6c AK |
2376 | |
2377 | QLIST_FOREACH(cancel_pdu, &s->active_list, next) { | |
2378 | if (cancel_pdu->tag == tag) { | |
2379 | break; | |
2380 | } | |
2381 | } | |
2382 | if (cancel_pdu) { | |
2383 | cancel_pdu->cancelled = 1; | |
2384 | /* | |
2385 | * Wait for pdu to complete. | |
2386 | */ | |
2387 | qemu_co_queue_wait(&cancel_pdu->complete); | |
2388 | cancel_pdu->cancelled = 0; | |
2389 | free_pdu(pdu->s, cancel_pdu); | |
2390 | } | |
9c5e9d89 | 2391 | complete_pdu(s, pdu, 7); |
ff06030f | 2392 | return; |
9f107513 AL |
2393 | } |
2394 | ||
ff06030f | 2395 | static void v9fs_link(void *opaque) |
b2c224be | 2396 | { |
ff06030f VJ |
2397 | V9fsPDU *pdu = opaque; |
2398 | V9fsState *s = pdu->s; | |
b2c224be VJ |
2399 | int32_t dfid, oldfid; |
2400 | V9fsFidState *dfidp, *oldfidp; | |
2289be19 | 2401 | V9fsString name;; |
b2c224be VJ |
2402 | size_t offset = 7; |
2403 | int err = 0; | |
2404 | ||
b2c224be | 2405 | pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); |
c572f23a | 2406 | trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); |
b2c224be | 2407 | |
bccacf6c | 2408 | dfidp = get_fid(pdu, dfid); |
b2c224be | 2409 | if (dfidp == NULL) { |
ffd66876 | 2410 | err = -ENOENT; |
84dfb926 | 2411 | goto out_nofid; |
b2c224be VJ |
2412 | } |
2413 | ||
bccacf6c | 2414 | oldfidp = get_fid(pdu, oldfid); |
b2c224be | 2415 | if (oldfidp == NULL) { |
ffd66876 | 2416 | err = -ENOENT; |
b2c224be VJ |
2417 | goto out; |
2418 | } | |
bccacf6c | 2419 | err = v9fs_co_link(pdu, oldfidp, dfidp, &name); |
ffd66876 VJ |
2420 | if (!err) { |
2421 | err = offset; | |
b2c224be | 2422 | } |
b2c224be | 2423 | out: |
bccacf6c | 2424 | put_fid(pdu, dfidp); |
84dfb926 | 2425 | out_nofid: |
b2c224be VJ |
2426 | v9fs_string_free(&name); |
2427 | complete_pdu(s, pdu, err); | |
2428 | } | |
2429 | ||
532decb7 | 2430 | /* Only works with path name based fid */ |
ff06030f | 2431 | static void v9fs_remove(void *opaque) |
9f107513 | 2432 | { |
5bae1900 | 2433 | int32_t fid; |
5bae1900 | 2434 | int err = 0; |
ae1ef571 VJ |
2435 | size_t offset = 7; |
2436 | V9fsFidState *fidp; | |
2437 | V9fsPDU *pdu = opaque; | |
5bae1900 | 2438 | |
ae1ef571 | 2439 | pdu_unmarshal(pdu, offset, "d", &fid); |
c572f23a | 2440 | trace_v9fs_remove(pdu->tag, pdu->id, fid); |
5bae1900 | 2441 | |
bccacf6c | 2442 | fidp = get_fid(pdu, fid); |
ae1ef571 | 2443 | if (fidp == NULL) { |
5bae1900 | 2444 | err = -EINVAL; |
84dfb926 | 2445 | goto out_nofid; |
9f107513 | 2446 | } |
532decb7 | 2447 | /* if fs driver is not path based, return EOPNOTSUPP */ |
c98f1d4a | 2448 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { |
532decb7 AK |
2449 | err = -EOPNOTSUPP; |
2450 | goto out_err; | |
2451 | } | |
7a462745 AK |
2452 | /* |
2453 | * IF the file is unlinked, we cannot reopen | |
2454 | * the file later. So don't reclaim fd | |
2455 | */ | |
bccacf6c | 2456 | err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); |
7a462745 AK |
2457 | if (err < 0) { |
2458 | goto out_err; | |
2459 | } | |
bccacf6c | 2460 | err = v9fs_co_remove(pdu, &fidp->path); |
ae1ef571 VJ |
2461 | if (!err) { |
2462 | err = offset; | |
2463 | } | |
7a462745 | 2464 | out_err: |
ae1ef571 | 2465 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
84dfb926 | 2466 | clunk_fid(pdu->s, fidp->fid); |
bccacf6c | 2467 | put_fid(pdu, fidp); |
84dfb926 | 2468 | out_nofid: |
ae1ef571 | 2469 | complete_pdu(pdu->s, pdu, err); |
9f107513 AL |
2470 | } |
2471 | ||
7834cf77 AK |
2472 | static void v9fs_unlinkat(void *opaque) |
2473 | { | |
2474 | int err = 0; | |
2475 | V9fsString name; | |
2476 | int32_t dfid, flags; | |
2477 | size_t offset = 7; | |
2289be19 | 2478 | V9fsPath path; |
7834cf77 AK |
2479 | V9fsFidState *dfidp; |
2480 | V9fsPDU *pdu = opaque; | |
7834cf77 AK |
2481 | |
2482 | pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); | |
2483 | ||
bccacf6c | 2484 | dfidp = get_fid(pdu, dfid); |
7834cf77 AK |
2485 | if (dfidp == NULL) { |
2486 | err = -EINVAL; | |
2487 | goto out_nofid; | |
2488 | } | |
7834cf77 AK |
2489 | /* |
2490 | * IF the file is unlinked, we cannot reopen | |
2491 | * the file later. So don't reclaim fd | |
2492 | */ | |
2289be19 | 2493 | v9fs_path_init(&path); |
bccacf6c | 2494 | err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); |
2289be19 AK |
2495 | if (err < 0) { |
2496 | goto out_err; | |
2497 | } | |
bccacf6c | 2498 | err = v9fs_mark_fids_unreclaim(pdu, &path); |
7834cf77 AK |
2499 | if (err < 0) { |
2500 | goto out_err; | |
2501 | } | |
bccacf6c | 2502 | err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags); |
7834cf77 AK |
2503 | if (!err) { |
2504 | err = offset; | |
2505 | } | |
2506 | out_err: | |
bccacf6c | 2507 | put_fid(pdu, dfidp); |
2289be19 | 2508 | v9fs_path_free(&path); |
7834cf77 AK |
2509 | out_nofid: |
2510 | complete_pdu(pdu->s, pdu, err); | |
2511 | v9fs_string_free(&name); | |
2512 | } | |
2513 | ||
2289be19 AK |
2514 | |
2515 | /* Only works with path name based fid */ | |
bccacf6c | 2516 | static int v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, |
930b1e17 | 2517 | int32_t newdirfid, V9fsString *name) |
8cf89e00 | 2518 | { |
930b1e17 | 2519 | char *end; |
c7b4b0b3 | 2520 | int err = 0; |
2289be19 AK |
2521 | V9fsPath new_path; |
2522 | V9fsFidState *tfidp; | |
bccacf6c | 2523 | V9fsState *s = pdu->s; |
84dfb926 | 2524 | V9fsFidState *dirfidp = NULL; |
c7b4b0b3 | 2525 | char *old_name, *new_name; |
8cf89e00 | 2526 | |
2289be19 | 2527 | v9fs_path_init(&new_path); |
930b1e17 | 2528 | if (newdirfid != -1) { |
bccacf6c | 2529 | dirfidp = get_fid(pdu, newdirfid); |
c7b4b0b3 MK |
2530 | if (dirfidp == NULL) { |
2531 | err = -ENOENT; | |
84dfb926 | 2532 | goto out_nofid; |
c7b4b0b3 | 2533 | } |
d62dbb51 | 2534 | BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
bccacf6c | 2535 | v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); |
c7b4b0b3 | 2536 | } else { |
930b1e17 | 2537 | old_name = fidp->path.data; |
8cf89e00 AL |
2538 | end = strrchr(old_name, '/'); |
2539 | if (end) { | |
2540 | end++; | |
2541 | } else { | |
2542 | end = old_name; | |
2543 | } | |
7267c094 | 2544 | new_name = g_malloc0(end - old_name + name->size + 1); |
c7b4b0b3 | 2545 | strncat(new_name, old_name, end - old_name); |
930b1e17 | 2546 | strncat(new_name + (end - old_name), name->data, name->size); |
bccacf6c | 2547 | v9fs_co_name_to_path(pdu, NULL, new_name, &new_path); |
2289be19 | 2548 | g_free(new_name); |
c7b4b0b3 | 2549 | } |
bccacf6c | 2550 | err = v9fs_co_rename(pdu, &fidp->path, &new_path); |
2289be19 AK |
2551 | if (err < 0) { |
2552 | goto out; | |
2553 | } | |
2554 | /* | |
2555 | * Fixup fid's pointing to the old name to | |
2556 | * start pointing to the new name | |
2557 | */ | |
2558 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
2559 | if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { | |
2560 | /* replace the name */ | |
2561 | v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); | |
8cf89e00 AL |
2562 | } |
2563 | } | |
c7b4b0b3 | 2564 | out: |
84dfb926 | 2565 | if (dirfidp) { |
bccacf6c | 2566 | put_fid(pdu, dirfidp); |
84dfb926 | 2567 | } |
2289be19 | 2568 | v9fs_path_free(&new_path); |
84dfb926 | 2569 | out_nofid: |
c7b4b0b3 MK |
2570 | return err; |
2571 | } | |
2572 | ||
532decb7 | 2573 | /* Only works with path name based fid */ |
ff06030f | 2574 | static void v9fs_rename(void *opaque) |
c7b4b0b3 MK |
2575 | { |
2576 | int32_t fid; | |
c7b4b0b3 | 2577 | ssize_t err = 0; |
930b1e17 AK |
2578 | size_t offset = 7; |
2579 | V9fsString name; | |
2580 | int32_t newdirfid; | |
2581 | V9fsFidState *fidp; | |
2582 | V9fsPDU *pdu = opaque; | |
2583 | V9fsState *s = pdu->s; | |
c7b4b0b3 | 2584 | |
930b1e17 | 2585 | pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); |
c7b4b0b3 | 2586 | |
bccacf6c | 2587 | fidp = get_fid(pdu, fid); |
930b1e17 | 2588 | if (fidp == NULL) { |
c7b4b0b3 | 2589 | err = -ENOENT; |
84dfb926 | 2590 | goto out_nofid; |
c7b4b0b3 | 2591 | } |
930b1e17 | 2592 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
532decb7 | 2593 | /* if fs driver is not path based, return EOPNOTSUPP */ |
c98f1d4a | 2594 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { |
532decb7 AK |
2595 | err = -EOPNOTSUPP; |
2596 | goto out; | |
2597 | } | |
2598 | v9fs_path_write_lock(s); | |
bccacf6c | 2599 | err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); |
532decb7 | 2600 | v9fs_path_unlock(s); |
930b1e17 AK |
2601 | if (!err) { |
2602 | err = offset; | |
2603 | } | |
532decb7 | 2604 | out: |
bccacf6c | 2605 | put_fid(pdu, fidp); |
84dfb926 | 2606 | out_nofid: |
930b1e17 AK |
2607 | complete_pdu(s, pdu, err); |
2608 | v9fs_string_free(&name); | |
c7b4b0b3 MK |
2609 | } |
2610 | ||
bccacf6c | 2611 | static void v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, |
2289be19 AK |
2612 | V9fsString *old_name, V9fsPath *newdir, |
2613 | V9fsString *new_name) | |
2614 | { | |
2615 | V9fsFidState *tfidp; | |
2616 | V9fsPath oldpath, newpath; | |
bccacf6c | 2617 | V9fsState *s = pdu->s; |
2289be19 AK |
2618 | |
2619 | ||
2620 | v9fs_path_init(&oldpath); | |
2621 | v9fs_path_init(&newpath); | |
bccacf6c AK |
2622 | v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); |
2623 | v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); | |
2289be19 AK |
2624 | |
2625 | /* | |
2626 | * Fixup fid's pointing to the old name to | |
2627 | * start pointing to the new name | |
2628 | */ | |
2629 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
2630 | if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { | |
2631 | /* replace the name */ | |
2632 | v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); | |
2633 | } | |
2634 | } | |
2635 | v9fs_path_free(&oldpath); | |
2636 | v9fs_path_free(&newpath); | |
2637 | } | |
2638 | ||
bccacf6c | 2639 | static int v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, |
89bf6593 AK |
2640 | V9fsString *old_name, int32_t newdirfid, |
2641 | V9fsString *new_name) | |
2642 | { | |
2643 | int err = 0; | |
bccacf6c | 2644 | V9fsState *s = pdu->s; |
89bf6593 AK |
2645 | V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; |
2646 | ||
bccacf6c | 2647 | olddirfidp = get_fid(pdu, olddirfid); |
89bf6593 AK |
2648 | if (olddirfidp == NULL) { |
2649 | err = -ENOENT; | |
2650 | goto out; | |
2651 | } | |
89bf6593 | 2652 | if (newdirfid != -1) { |
bccacf6c | 2653 | newdirfidp = get_fid(pdu, newdirfid); |
89bf6593 AK |
2654 | if (newdirfidp == NULL) { |
2655 | err = -ENOENT; | |
2656 | goto out; | |
2657 | } | |
89bf6593 | 2658 | } else { |
bccacf6c | 2659 | newdirfidp = get_fid(pdu, olddirfid); |
89bf6593 AK |
2660 | } |
2661 | ||
bccacf6c | 2662 | err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, |
2289be19 AK |
2663 | &newdirfidp->path, new_name); |
2664 | if (err < 0) { | |
2665 | goto out; | |
89bf6593 | 2666 | } |
c98f1d4a | 2667 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { |
532decb7 | 2668 | /* Only for path based fid we need to do the below fixup */ |
bccacf6c | 2669 | v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, |
532decb7 AK |
2670 | &newdirfidp->path, new_name); |
2671 | } | |
89bf6593 AK |
2672 | out: |
2673 | if (olddirfidp) { | |
bccacf6c | 2674 | put_fid(pdu, olddirfidp); |
89bf6593 AK |
2675 | } |
2676 | if (newdirfidp) { | |
bccacf6c | 2677 | put_fid(pdu, newdirfidp); |
89bf6593 | 2678 | } |
89bf6593 AK |
2679 | return err; |
2680 | } | |
2681 | ||
2682 | static void v9fs_renameat(void *opaque) | |
2683 | { | |
2684 | ssize_t err = 0; | |
2685 | size_t offset = 7; | |
2686 | V9fsPDU *pdu = opaque; | |
2687 | V9fsState *s = pdu->s; | |
2688 | int32_t olddirfid, newdirfid; | |
2689 | V9fsString old_name, new_name; | |
2690 | ||
2691 | pdu_unmarshal(pdu, offset, "dsds", &olddirfid, | |
2692 | &old_name, &newdirfid, &new_name); | |
2693 | ||
532decb7 | 2694 | v9fs_path_write_lock(s); |
bccacf6c AK |
2695 | err = v9fs_complete_renameat(pdu, olddirfid, |
2696 | &old_name, newdirfid, &new_name); | |
532decb7 | 2697 | v9fs_path_unlock(s); |
89bf6593 AK |
2698 | if (!err) { |
2699 | err = offset; | |
2700 | } | |
2701 | complete_pdu(s, pdu, err); | |
2702 | v9fs_string_free(&old_name); | |
2703 | v9fs_string_free(&new_name); | |
2704 | } | |
2705 | ||
b81d685e | 2706 | static void v9fs_wstat(void *opaque) |
8cf89e00 | 2707 | { |
b81d685e AK |
2708 | int32_t fid; |
2709 | int err = 0; | |
2710 | int16_t unused; | |
2711 | V9fsStat v9stat; | |
2712 | size_t offset = 7; | |
2713 | struct stat stbuf; | |
2714 | V9fsFidState *fidp; | |
2715 | V9fsPDU *pdu = opaque; | |
2716 | V9fsState *s = pdu->s; | |
8cf89e00 | 2717 | |
b81d685e | 2718 | pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); |
c572f23a HPB |
2719 | trace_v9fs_wstat(pdu->tag, pdu->id, fid, |
2720 | v9stat.mode, v9stat.atime, v9stat.mtime); | |
84dfb926 | 2721 | |
bccacf6c | 2722 | fidp = get_fid(pdu, fid); |
b81d685e AK |
2723 | if (fidp == NULL) { |
2724 | err = -EINVAL; | |
84dfb926 | 2725 | goto out_nofid; |
8cf89e00 | 2726 | } |
b81d685e AK |
2727 | /* do we need to sync the file? */ |
2728 | if (donttouch_stat(&v9stat)) { | |
bccacf6c | 2729 | err = v9fs_co_fsync(pdu, fidp, 0); |
8cf89e00 AL |
2730 | goto out; |
2731 | } | |
b81d685e AK |
2732 | if (v9stat.mode != -1) { |
2733 | uint32_t v9_mode; | |
bccacf6c | 2734 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
b81d685e AK |
2735 | if (err < 0) { |
2736 | goto out; | |
2737 | } | |
2738 | v9_mode = stat_to_v9mode(&stbuf); | |
2739 | if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2740 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2741 | /* Attempting to change the type */ | |
2742 | err = -EIO; | |
2743 | goto out; | |
2744 | } | |
bccacf6c | 2745 | err = v9fs_co_chmod(pdu, &fidp->path, |
b81d685e AK |
2746 | v9mode_to_mode(v9stat.mode, |
2747 | &v9stat.extension)); | |
2748 | if (err < 0) { | |
2749 | goto out; | |
2750 | } | |
2751 | } | |
2752 | if (v9stat.mtime != -1 || v9stat.atime != -1) { | |
8fc39ae4 | 2753 | struct timespec times[2]; |
b81d685e AK |
2754 | if (v9stat.atime != -1) { |
2755 | times[0].tv_sec = v9stat.atime; | |
8fc39ae4 SK |
2756 | times[0].tv_nsec = 0; |
2757 | } else { | |
2758 | times[0].tv_nsec = UTIME_OMIT; | |
2759 | } | |
b81d685e AK |
2760 | if (v9stat.mtime != -1) { |
2761 | times[1].tv_sec = v9stat.mtime; | |
8fc39ae4 SK |
2762 | times[1].tv_nsec = 0; |
2763 | } else { | |
2764 | times[1].tv_nsec = UTIME_OMIT; | |
2765 | } | |
bccacf6c | 2766 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
b81d685e AK |
2767 | if (err < 0) { |
2768 | goto out; | |
8cf89e00 AL |
2769 | } |
2770 | } | |
b81d685e | 2771 | if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { |
bccacf6c | 2772 | err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); |
b81d685e | 2773 | if (err < 0) { |
8cf89e00 | 2774 | goto out; |
b81d685e | 2775 | } |
8cf89e00 | 2776 | } |
b81d685e | 2777 | if (v9stat.name.size != 0) { |
bccacf6c | 2778 | err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); |
b81d685e AK |
2779 | if (err < 0) { |
2780 | goto out; | |
2781 | } | |
8cf89e00 | 2782 | } |
b81d685e | 2783 | if (v9stat.length != -1) { |
bccacf6c | 2784 | err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); |
b81d685e AK |
2785 | if (err < 0) { |
2786 | goto out; | |
2787 | } | |
8cf89e00 | 2788 | } |
b81d685e | 2789 | err = offset; |
8cf89e00 | 2790 | out: |
bccacf6c | 2791 | put_fid(pdu, fidp); |
84dfb926 | 2792 | out_nofid: |
b81d685e AK |
2793 | v9fs_stat_free(&v9stat); |
2794 | complete_pdu(s, pdu, err); | |
9f107513 AL |
2795 | } |
2796 | ||
88a4763e AK |
2797 | static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
2798 | { | |
2799 | uint32_t f_type; | |
2800 | uint32_t f_bsize; | |
2801 | uint64_t f_blocks; | |
2802 | uint64_t f_bfree; | |
2803 | uint64_t f_bavail; | |
2804 | uint64_t f_files; | |
2805 | uint64_t f_ffree; | |
2806 | uint64_t fsid_val; | |
2807 | uint32_t f_namelen; | |
2808 | size_t offset = 7; | |
5e94c103 MK |
2809 | int32_t bsize_factor; |
2810 | ||
5e94c103 MK |
2811 | /* |
2812 | * compute bsize factor based on host file system block size | |
2813 | * and client msize | |
2814 | */ | |
88a4763e | 2815 | bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
5e94c103 MK |
2816 | if (!bsize_factor) { |
2817 | bsize_factor = 1; | |
2818 | } | |
88a4763e AK |
2819 | f_type = stbuf->f_type; |
2820 | f_bsize = stbuf->f_bsize; | |
2821 | f_bsize *= bsize_factor; | |
5e94c103 MK |
2822 | /* |
2823 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
2824 | * adjust(divide) the number of blocks, free blocks and available | |
2825 | * blocks by bsize factor | |
2826 | */ | |
88a4763e AK |
2827 | f_blocks = stbuf->f_blocks/bsize_factor; |
2828 | f_bfree = stbuf->f_bfree/bsize_factor; | |
2829 | f_bavail = stbuf->f_bavail/bsize_factor; | |
2830 | f_files = stbuf->f_files; | |
2831 | f_ffree = stbuf->f_ffree; | |
2832 | fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | | |
2833 | (unsigned long long)stbuf->f_fsid.__val[1] << 32; | |
2834 | f_namelen = stbuf->f_namelen; | |
be940c87 | 2835 | |
88a4763e AK |
2836 | return pdu_marshal(pdu, offset, "ddqqqqqqd", |
2837 | f_type, f_bsize, f_blocks, f_bfree, | |
2838 | f_bavail, f_files, f_ffree, | |
2839 | fsid_val, f_namelen); | |
be940c87 MK |
2840 | } |
2841 | ||
ff06030f | 2842 | static void v9fs_statfs(void *opaque) |
be940c87 | 2843 | { |
88a4763e AK |
2844 | int32_t fid; |
2845 | ssize_t retval = 0; | |
2846 | size_t offset = 7; | |
2847 | V9fsFidState *fidp; | |
2848 | struct statfs stbuf; | |
ff06030f VJ |
2849 | V9fsPDU *pdu = opaque; |
2850 | V9fsState *s = pdu->s; | |
be940c87 | 2851 | |
88a4763e | 2852 | pdu_unmarshal(pdu, offset, "d", &fid); |
bccacf6c | 2853 | fidp = get_fid(pdu, fid); |
88a4763e AK |
2854 | if (fidp == NULL) { |
2855 | retval = -ENOENT; | |
84dfb926 | 2856 | goto out_nofid; |
be940c87 | 2857 | } |
bccacf6c | 2858 | retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); |
88a4763e AK |
2859 | if (retval < 0) { |
2860 | goto out; | |
2861 | } | |
2862 | retval = offset; | |
2863 | retval += v9fs_fill_statfs(s, pdu, &stbuf); | |
be940c87 | 2864 | out: |
bccacf6c | 2865 | put_fid(pdu, fidp); |
84dfb926 | 2866 | out_nofid: |
88a4763e | 2867 | complete_pdu(s, pdu, retval); |
ff06030f | 2868 | return; |
be940c87 MK |
2869 | } |
2870 | ||
ff06030f | 2871 | static void v9fs_mknod(void *opaque) |
5268cecc | 2872 | { |
1b733fed AK |
2873 | |
2874 | int mode; | |
2875 | gid_t gid; | |
5268cecc | 2876 | int32_t fid; |
1b733fed | 2877 | V9fsQID qid; |
5268cecc | 2878 | int err = 0; |
5268cecc | 2879 | int major, minor; |
1b733fed AK |
2880 | size_t offset = 7; |
2881 | V9fsString name; | |
2882 | struct stat stbuf; | |
1b733fed AK |
2883 | V9fsFidState *fidp; |
2884 | V9fsPDU *pdu = opaque; | |
2885 | V9fsState *s = pdu->s; | |
5268cecc | 2886 | |
1b733fed AK |
2887 | pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, |
2888 | &major, &minor, &gid); | |
c572f23a | 2889 | trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); |
5268cecc | 2890 | |
bccacf6c | 2891 | fidp = get_fid(pdu, fid); |
5268cecc MK |
2892 | if (fidp == NULL) { |
2893 | err = -ENOENT; | |
84dfb926 | 2894 | goto out_nofid; |
5268cecc | 2895 | } |
bccacf6c | 2896 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, |
02cb7f3a | 2897 | makedev(major, minor), mode, &stbuf); |
1b733fed AK |
2898 | if (err < 0) { |
2899 | goto out; | |
2900 | } | |
2901 | stat_to_qid(&stbuf, &qid); | |
2902 | err = offset; | |
2903 | err += pdu_marshal(pdu, offset, "Q", &qid); | |
7999f7e1 AK |
2904 | trace_v9fs_mknod_return(pdu->tag, pdu->id, |
2905 | qid.type, qid.version, qid.path); | |
5268cecc | 2906 | out: |
bccacf6c | 2907 | put_fid(pdu, fidp); |
84dfb926 | 2908 | out_nofid: |
1b733fed | 2909 | complete_pdu(s, pdu, err); |
1b733fed | 2910 | v9fs_string_free(&name); |
5268cecc MK |
2911 | } |
2912 | ||
82cc3ee8 MK |
2913 | /* |
2914 | * Implement posix byte range locking code | |
2915 | * Server side handling of locking code is very simple, because 9p server in | |
2916 | * QEMU can handle only one client. And most of the lock handling | |
2917 | * (like conflict, merging) etc is done by the VFS layer itself, so no need to | |
2918 | * do any thing in * qemu 9p server side lock code path. | |
2919 | * So when a TLOCK request comes, always return success | |
2920 | */ | |
ff06030f | 2921 | static void v9fs_lock(void *opaque) |
82cc3ee8 | 2922 | { |
0c27bf2a AK |
2923 | int8_t status; |
2924 | V9fsFlock *flock; | |
2925 | size_t offset = 7; | |
2926 | struct stat stbuf; | |
2927 | V9fsFidState *fidp; | |
2928 | int32_t fid, err = 0; | |
ff06030f VJ |
2929 | V9fsPDU *pdu = opaque; |
2930 | V9fsState *s = pdu->s; | |
82cc3ee8 | 2931 | |
0c27bf2a AK |
2932 | flock = g_malloc(sizeof(*flock)); |
2933 | pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock->type, | |
2934 | &flock->flags, &flock->start, &flock->length, | |
2935 | &flock->proc_id, &flock->client_id); | |
c572f23a HPB |
2936 | |
2937 | trace_v9fs_lock(pdu->tag, pdu->id, fid, | |
2938 | flock->type, flock->start, flock->length); | |
2939 | ||
0c27bf2a | 2940 | status = P9_LOCK_ERROR; |
82cc3ee8 MK |
2941 | |
2942 | /* We support only block flag now (that too ignored currently) */ | |
0c27bf2a | 2943 | if (flock->flags & ~P9_LOCK_FLAGS_BLOCK) { |
82cc3ee8 | 2944 | err = -EINVAL; |
84dfb926 | 2945 | goto out_nofid; |
82cc3ee8 | 2946 | } |
bccacf6c | 2947 | fidp = get_fid(pdu, fid); |
0c27bf2a | 2948 | if (fidp == NULL) { |
82cc3ee8 | 2949 | err = -ENOENT; |
84dfb926 | 2950 | goto out_nofid; |
82cc3ee8 | 2951 | } |
cc720ddb | 2952 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
82cc3ee8 | 2953 | if (err < 0) { |
82cc3ee8 MK |
2954 | goto out; |
2955 | } | |
0c27bf2a | 2956 | status = P9_LOCK_SUCCESS; |
82cc3ee8 | 2957 | out: |
bccacf6c | 2958 | put_fid(pdu, fidp); |
84dfb926 | 2959 | out_nofid: |
0c27bf2a AK |
2960 | err = offset; |
2961 | err += pdu_marshal(pdu, offset, "b", status); | |
c572f23a | 2962 | trace_v9fs_lock_return(pdu->tag, pdu->id, status); |
0c27bf2a | 2963 | complete_pdu(s, pdu, err); |
10e72295 | 2964 | v9fs_string_free(&flock->client_id); |
0c27bf2a | 2965 | g_free(flock); |
82cc3ee8 MK |
2966 | } |
2967 | ||
8f354003 MK |
2968 | /* |
2969 | * When a TGETLOCK request comes, always return success because all lock | |
2970 | * handling is done by client's VFS layer. | |
2971 | */ | |
ff06030f | 2972 | static void v9fs_getlock(void *opaque) |
8f354003 | 2973 | { |
e4e414a4 AK |
2974 | size_t offset = 7; |
2975 | struct stat stbuf; | |
2976 | V9fsFidState *fidp; | |
2977 | V9fsGetlock *glock; | |
2978 | int32_t fid, err = 0; | |
ff06030f VJ |
2979 | V9fsPDU *pdu = opaque; |
2980 | V9fsState *s = pdu->s; | |
8f354003 | 2981 | |
e4e414a4 AK |
2982 | glock = g_malloc(sizeof(*glock)); |
2983 | pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock->type, | |
2984 | &glock->start, &glock->length, &glock->proc_id, | |
2985 | &glock->client_id); | |
8f354003 | 2986 | |
c572f23a HPB |
2987 | trace_v9fs_getlock(pdu->tag, pdu->id, fid, |
2988 | glock->type, glock->start, glock->length); | |
2989 | ||
bccacf6c | 2990 | fidp = get_fid(pdu, fid); |
e4e414a4 | 2991 | if (fidp == NULL) { |
8f354003 | 2992 | err = -ENOENT; |
84dfb926 | 2993 | goto out_nofid; |
8f354003 | 2994 | } |
cc720ddb | 2995 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
8f354003 | 2996 | if (err < 0) { |
8f354003 MK |
2997 | goto out; |
2998 | } | |
ea60f315 | 2999 | glock->type = P9_LOCK_TYPE_UNLCK; |
e4e414a4 AK |
3000 | offset += pdu_marshal(pdu, offset, "bqqds", glock->type, |
3001 | glock->start, glock->length, glock->proc_id, | |
3002 | &glock->client_id); | |
3003 | err = offset; | |
7999f7e1 AK |
3004 | trace_v9fs_getlock_return(pdu->tag, pdu->id, glock->type, glock->start, |
3005 | glock->length, glock->proc_id); | |
8f354003 | 3006 | out: |
bccacf6c | 3007 | put_fid(pdu, fidp); |
84dfb926 | 3008 | out_nofid: |
e4e414a4 | 3009 | complete_pdu(s, pdu, err); |
10e72295 | 3010 | v9fs_string_free(&glock->client_id); |
e4e414a4 | 3011 | g_free(glock); |
8f354003 MK |
3012 | } |
3013 | ||
ff06030f | 3014 | static void v9fs_mkdir(void *opaque) |
b67592ea | 3015 | { |
ff06030f | 3016 | V9fsPDU *pdu = opaque; |
e84861f7 | 3017 | size_t offset = 7; |
b67592ea | 3018 | int32_t fid; |
e84861f7 | 3019 | struct stat stbuf; |
e84861f7 | 3020 | V9fsQID qid; |
02cb7f3a | 3021 | V9fsString name; |
b67592ea MK |
3022 | V9fsFidState *fidp; |
3023 | gid_t gid; | |
3024 | int mode; | |
e84861f7 | 3025 | int err = 0; |
b67592ea | 3026 | |
e84861f7 | 3027 | pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); |
b67592ea | 3028 | |
c572f23a HPB |
3029 | trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); |
3030 | ||
bccacf6c | 3031 | fidp = get_fid(pdu, fid); |
b67592ea MK |
3032 | if (fidp == NULL) { |
3033 | err = -ENOENT; | |
84dfb926 | 3034 | goto out_nofid; |
b67592ea | 3035 | } |
bccacf6c | 3036 | err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); |
e84861f7 VJ |
3037 | if (err < 0) { |
3038 | goto out; | |
3039 | } | |
3040 | stat_to_qid(&stbuf, &qid); | |
3041 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
3042 | err = offset; | |
7999f7e1 AK |
3043 | trace_v9fs_mkdir_return(pdu->tag, pdu->id, |
3044 | qid.type, qid.version, qid.path, err); | |
b67592ea | 3045 | out: |
bccacf6c | 3046 | put_fid(pdu, fidp); |
84dfb926 | 3047 | out_nofid: |
e84861f7 | 3048 | complete_pdu(pdu->s, pdu, err); |
e84861f7 | 3049 | v9fs_string_free(&name); |
b67592ea MK |
3050 | } |
3051 | ||
ff06030f | 3052 | static void v9fs_xattrwalk(void *opaque) |
fa32ef88 | 3053 | { |
670185a6 AK |
3054 | int64_t size; |
3055 | V9fsString name; | |
fa32ef88 | 3056 | ssize_t err = 0; |
670185a6 | 3057 | size_t offset = 7; |
fa32ef88 | 3058 | int32_t fid, newfid; |
670185a6 | 3059 | V9fsFidState *file_fidp; |
84dfb926 | 3060 | V9fsFidState *xattr_fidp = NULL; |
670185a6 AK |
3061 | V9fsPDU *pdu = opaque; |
3062 | V9fsState *s = pdu->s; | |
fa32ef88 | 3063 | |
670185a6 | 3064 | pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); |
c572f23a HPB |
3065 | trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); |
3066 | ||
bccacf6c | 3067 | file_fidp = get_fid(pdu, fid); |
670185a6 | 3068 | if (file_fidp == NULL) { |
fa32ef88 | 3069 | err = -ENOENT; |
84dfb926 | 3070 | goto out_nofid; |
fa32ef88 | 3071 | } |
670185a6 AK |
3072 | xattr_fidp = alloc_fid(s, newfid); |
3073 | if (xattr_fidp == NULL) { | |
fa32ef88 AK |
3074 | err = -EINVAL; |
3075 | goto out; | |
3076 | } | |
2289be19 | 3077 | v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); |
670185a6 | 3078 | if (name.data[0] == 0) { |
fa32ef88 AK |
3079 | /* |
3080 | * listxattr request. Get the size first | |
3081 | */ | |
bccacf6c | 3082 | size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); |
670185a6 AK |
3083 | if (size < 0) { |
3084 | err = size; | |
84dfb926 | 3085 | clunk_fid(s, xattr_fidp->fid); |
670185a6 | 3086 | goto out; |
fa32ef88 | 3087 | } |
670185a6 AK |
3088 | /* |
3089 | * Read the xattr value | |
3090 | */ | |
3091 | xattr_fidp->fs.xattr.len = size; | |
3092 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3093 | xattr_fidp->fs.xattr.copied_len = -1; | |
3094 | if (size) { | |
7267c094 | 3095 | xattr_fidp->fs.xattr.value = g_malloc(size); |
bccacf6c | 3096 | err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3097 | xattr_fidp->fs.xattr.value, |
3098 | xattr_fidp->fs.xattr.len); | |
3099 | if (err < 0) { | |
84dfb926 | 3100 | clunk_fid(s, xattr_fidp->fid); |
670185a6 AK |
3101 | goto out; |
3102 | } | |
3103 | } | |
3104 | offset += pdu_marshal(pdu, offset, "q", size); | |
3105 | err = offset; | |
fa32ef88 AK |
3106 | } else { |
3107 | /* | |
3108 | * specific xattr fid. We check for xattr | |
3109 | * presence also collect the xattr size | |
3110 | */ | |
bccacf6c | 3111 | size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3112 | &name, NULL, 0); |
3113 | if (size < 0) { | |
3114 | err = size; | |
84dfb926 | 3115 | clunk_fid(s, xattr_fidp->fid); |
670185a6 | 3116 | goto out; |
fa32ef88 | 3117 | } |
670185a6 AK |
3118 | /* |
3119 | * Read the xattr value | |
3120 | */ | |
3121 | xattr_fidp->fs.xattr.len = size; | |
3122 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3123 | xattr_fidp->fs.xattr.copied_len = -1; | |
3124 | if (size) { | |
7267c094 | 3125 | xattr_fidp->fs.xattr.value = g_malloc(size); |
bccacf6c | 3126 | err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
670185a6 AK |
3127 | &name, xattr_fidp->fs.xattr.value, |
3128 | xattr_fidp->fs.xattr.len); | |
3129 | if (err < 0) { | |
84dfb926 | 3130 | clunk_fid(s, xattr_fidp->fid); |
670185a6 AK |
3131 | goto out; |
3132 | } | |
3133 | } | |
3134 | offset += pdu_marshal(pdu, offset, "q", size); | |
3135 | err = offset; | |
fa32ef88 | 3136 | } |
7999f7e1 | 3137 | trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); |
fa32ef88 | 3138 | out: |
bccacf6c | 3139 | put_fid(pdu, file_fidp); |
84dfb926 | 3140 | if (xattr_fidp) { |
bccacf6c | 3141 | put_fid(pdu, xattr_fidp); |
84dfb926 AK |
3142 | } |
3143 | out_nofid: | |
670185a6 AK |
3144 | complete_pdu(s, pdu, err); |
3145 | v9fs_string_free(&name); | |
fa32ef88 AK |
3146 | } |
3147 | ||
ff06030f | 3148 | static void v9fs_xattrcreate(void *opaque) |
10b468bd AK |
3149 | { |
3150 | int flags; | |
3151 | int32_t fid; | |
f10ff58d | 3152 | int64_t size; |
10b468bd | 3153 | ssize_t err = 0; |
f10ff58d AK |
3154 | V9fsString name; |
3155 | size_t offset = 7; | |
3156 | V9fsFidState *file_fidp; | |
3157 | V9fsFidState *xattr_fidp; | |
3158 | V9fsPDU *pdu = opaque; | |
3159 | V9fsState *s = pdu->s; | |
10b468bd | 3160 | |
f10ff58d AK |
3161 | pdu_unmarshal(pdu, offset, "dsqd", |
3162 | &fid, &name, &size, &flags); | |
c572f23a | 3163 | trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); |
10b468bd | 3164 | |
bccacf6c | 3165 | file_fidp = get_fid(pdu, fid); |
f10ff58d | 3166 | if (file_fidp == NULL) { |
10b468bd | 3167 | err = -EINVAL; |
84dfb926 | 3168 | goto out_nofid; |
10b468bd | 3169 | } |
10b468bd | 3170 | /* Make the file fid point to xattr */ |
f10ff58d AK |
3171 | xattr_fidp = file_fidp; |
3172 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3173 | xattr_fidp->fs.xattr.copied_len = 0; | |
3174 | xattr_fidp->fs.xattr.len = size; | |
3175 | xattr_fidp->fs.xattr.flags = flags; | |
3176 | v9fs_string_init(&xattr_fidp->fs.xattr.name); | |
3177 | v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); | |
3178 | if (size) { | |
7267c094 | 3179 | xattr_fidp->fs.xattr.value = g_malloc(size); |
f10ff58d AK |
3180 | } else { |
3181 | xattr_fidp->fs.xattr.value = NULL; | |
3182 | } | |
3183 | err = offset; | |
bccacf6c | 3184 | put_fid(pdu, file_fidp); |
84dfb926 | 3185 | out_nofid: |
f10ff58d AK |
3186 | complete_pdu(s, pdu, err); |
3187 | v9fs_string_free(&name); | |
10b468bd | 3188 | } |
fa32ef88 | 3189 | |
ff06030f | 3190 | static void v9fs_readlink(void *opaque) |
df0973a4 | 3191 | { |
ff06030f | 3192 | V9fsPDU *pdu = opaque; |
7a5ca31e VJ |
3193 | size_t offset = 7; |
3194 | V9fsString target; | |
df0973a4 | 3195 | int32_t fid; |
df0973a4 MK |
3196 | int err = 0; |
3197 | V9fsFidState *fidp; | |
3198 | ||
7a5ca31e | 3199 | pdu_unmarshal(pdu, offset, "d", &fid); |
c572f23a | 3200 | trace_v9fs_readlink(pdu->tag, pdu->id, fid); |
bccacf6c | 3201 | fidp = get_fid(pdu, fid); |
df0973a4 MK |
3202 | if (fidp == NULL) { |
3203 | err = -ENOENT; | |
84dfb926 | 3204 | goto out_nofid; |
df0973a4 MK |
3205 | } |
3206 | ||
7a5ca31e | 3207 | v9fs_string_init(&target); |
bccacf6c | 3208 | err = v9fs_co_readlink(pdu, &fidp->path, &target); |
7a5ca31e VJ |
3209 | if (err < 0) { |
3210 | goto out; | |
3211 | } | |
3212 | offset += pdu_marshal(pdu, offset, "s", &target); | |
3213 | err = offset; | |
7999f7e1 | 3214 | trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); |
7a5ca31e | 3215 | v9fs_string_free(&target); |
df0973a4 | 3216 | out: |
bccacf6c | 3217 | put_fid(pdu, fidp); |
84dfb926 | 3218 | out_nofid: |
7a5ca31e | 3219 | complete_pdu(pdu->s, pdu, err); |
df0973a4 MK |
3220 | } |
3221 | ||
ff06030f | 3222 | static CoroutineEntry *pdu_co_handlers[] = { |
c18e2f94 | 3223 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 3224 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 3225 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 3226 | [P9_TSETATTR] = v9fs_setattr, |
fa32ef88 | 3227 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
10b468bd | 3228 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
5268cecc | 3229 | [P9_TMKNOD] = v9fs_mknod, |
c7b4b0b3 | 3230 | [P9_TRENAME] = v9fs_rename, |
82cc3ee8 | 3231 | [P9_TLOCK] = v9fs_lock, |
8f354003 | 3232 | [P9_TGETLOCK] = v9fs_getlock, |
89bf6593 | 3233 | [P9_TRENAMEAT] = v9fs_renameat, |
df0973a4 | 3234 | [P9_TREADLINK] = v9fs_readlink, |
7834cf77 | 3235 | [P9_TUNLINKAT] = v9fs_unlinkat, |
b67592ea | 3236 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 | 3237 | [P9_TVERSION] = v9fs_version, |
771e9d4c | 3238 | [P9_TLOPEN] = v9fs_open, |
9f107513 AL |
3239 | [P9_TATTACH] = v9fs_attach, |
3240 | [P9_TSTAT] = v9fs_stat, | |
3241 | [P9_TWALK] = v9fs_walk, | |
3242 | [P9_TCLUNK] = v9fs_clunk, | |
b41e95d3 | 3243 | [P9_TFSYNC] = v9fs_fsync, |
9f107513 AL |
3244 | [P9_TOPEN] = v9fs_open, |
3245 | [P9_TREAD] = v9fs_read, | |
3246 | #if 0 | |
3247 | [P9_TAUTH] = v9fs_auth, | |
3248 | #endif | |
3249 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 3250 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 3251 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 3252 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 3253 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
3254 | [P9_TWRITE] = v9fs_write, |
3255 | [P9_TWSTAT] = v9fs_wstat, | |
3256 | [P9_TREMOVE] = v9fs_remove, | |
3257 | }; | |
3258 | ||
ff06030f | 3259 | static void v9fs_op_not_supp(void *opaque) |
5c3234c6 | 3260 | { |
ff06030f VJ |
3261 | V9fsPDU *pdu = opaque; |
3262 | complete_pdu(pdu->s, pdu, -EOPNOTSUPP); | |
5c3234c6 AK |
3263 | } |
3264 | ||
2c74c2cb MK |
3265 | static void v9fs_fs_ro(void *opaque) |
3266 | { | |
3267 | V9fsPDU *pdu = opaque; | |
3268 | complete_pdu(pdu->s, pdu, -EROFS); | |
3269 | } | |
3270 | ||
3271 | static inline bool is_read_only_op(V9fsPDU *pdu) | |
3272 | { | |
3273 | switch (pdu->id) { | |
3274 | case P9_TREADDIR: | |
3275 | case P9_TSTATFS: | |
3276 | case P9_TGETATTR: | |
3277 | case P9_TXATTRWALK: | |
3278 | case P9_TLOCK: | |
3279 | case P9_TGETLOCK: | |
3280 | case P9_TREADLINK: | |
3281 | case P9_TVERSION: | |
3282 | case P9_TLOPEN: | |
3283 | case P9_TATTACH: | |
3284 | case P9_TSTAT: | |
3285 | case P9_TWALK: | |
3286 | case P9_TCLUNK: | |
3287 | case P9_TFSYNC: | |
3288 | case P9_TOPEN: | |
3289 | case P9_TREAD: | |
3290 | case P9_TAUTH: | |
3291 | case P9_TFLUSH: | |
3292 | return 1; | |
3293 | default: | |
3294 | return 0; | |
3295 | } | |
3296 | } | |
3297 | ||
9f107513 AL |
3298 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3299 | { | |
ff06030f VJ |
3300 | Coroutine *co; |
3301 | CoroutineEntry *handler; | |
9f107513 | 3302 | |
ff06030f VJ |
3303 | if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || |
3304 | (pdu_co_handlers[pdu->id] == NULL)) { | |
5c3234c6 AK |
3305 | handler = v9fs_op_not_supp; |
3306 | } else { | |
ff06030f | 3307 | handler = pdu_co_handlers[pdu->id]; |
5c3234c6 | 3308 | } |
2c74c2cb MK |
3309 | |
3310 | if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { | |
3311 | handler = v9fs_fs_ro; | |
3312 | } | |
ff06030f VJ |
3313 | co = qemu_coroutine_create(handler); |
3314 | qemu_coroutine_enter(co, pdu); | |
9f107513 AL |
3315 | } |
3316 | ||
f4f61d27 | 3317 | void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
9f107513 AL |
3318 | { |
3319 | V9fsState *s = (V9fsState *)vdev; | |
3320 | V9fsPDU *pdu; | |
3321 | ssize_t len; | |
3322 | ||
3323 | while ((pdu = alloc_pdu(s)) && | |
3324 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
3325 | uint8_t *ptr; | |
ff06030f | 3326 | pdu->s = s; |
9f107513 AL |
3327 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
3328 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
3329 | ||
3330 | ptr = pdu->elem.out_sg[0].iov_base; | |
3331 | ||
3332 | memcpy(&pdu->size, ptr, 4); | |
3333 | pdu->id = ptr[4]; | |
3334 | memcpy(&pdu->tag, ptr + 5, 2); | |
bccacf6c | 3335 | qemu_co_queue_init(&pdu->complete); |
9f107513 AL |
3336 | submit_pdu(s, pdu); |
3337 | } | |
9f107513 AL |
3338 | free_pdu(s, pdu); |
3339 | } | |
7a462745 AK |
3340 | |
3341 | void virtio_9p_set_fd_limit(void) | |
3342 | { | |
3343 | struct rlimit rlim; | |
3344 | if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { | |
3345 | fprintf(stderr, "Failed to get the resource limit\n"); | |
3346 | exit(1); | |
3347 | } | |
3348 | open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); | |
3349 | open_fd_rc = rlim.rlim_cur/2; | |
3350 | } |