File: | hw/9pfs/virtio-9p.c |
Location: | line 3257, column 14 |
Description: | Although the value stored to 'len' is used in the enclosing expression, the value is never actually read from 'len' |
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 | |
14 | #include "hw/virtio.h" |
15 | #include "hw/pc.h" |
16 | #include "qemu_socket.h" |
17 | #include "hw/virtio-pci.h" |
18 | #include "virtio-9p.h" |
19 | #include "fsdev/qemu-fsdev.h" |
20 | #include "virtio-9p-xattr.h" |
21 | #include "virtio-9p-coth.h" |
22 | #include "trace.h" |
23 | #include "migration.h" |
24 | |
25 | int open_fd_hw; |
26 | int total_open_fd; |
27 | static int open_fd_rc; |
28 | |
29 | enum { |
30 | Oread = 0x00, |
31 | Owrite = 0x01, |
32 | Ordwr = 0x02, |
33 | Oexec = 0x03, |
34 | Oexcl = 0x04, |
35 | Otrunc = 0x10, |
36 | Orexec = 0x20, |
37 | Orclose = 0x40, |
38 | Oappend = 0x80, |
39 | }; |
40 | |
41 | static int omode_to_uflags(int8_t mode) |
42 | { |
43 | int ret = 0; |
44 | |
45 | switch (mode & 3) { |
46 | case Oread: |
47 | ret = O_RDONLY00; |
48 | break; |
49 | case Ordwr: |
50 | ret = O_RDWR02; |
51 | break; |
52 | case Owrite: |
53 | ret = O_WRONLY01; |
54 | break; |
55 | case Oexec: |
56 | ret = O_RDONLY00; |
57 | break; |
58 | } |
59 | |
60 | if (mode & Otrunc) { |
61 | ret |= O_TRUNC01000; |
62 | } |
63 | |
64 | if (mode & Oappend) { |
65 | ret |= O_APPEND02000; |
66 | } |
67 | |
68 | if (mode & Oexcl) { |
69 | ret |= O_EXCL0200; |
70 | } |
71 | |
72 | return ret; |
73 | } |
74 | |
75 | struct dotl_openflag_map { |
76 | int dotl_flag; |
77 | int open_flag; |
78 | }; |
79 | |
80 | static int dotl_to_open_flags(int flags) |
81 | { |
82 | int i; |
83 | /* |
84 | * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY |
85 | * and P9_DOTL_NOACCESS |
86 | */ |
87 | int oflags = flags & O_ACCMODE0003; |
88 | |
89 | struct dotl_openflag_map dotl_oflag_map[] = { |
90 | { P9_DOTL_CREATE00000100, O_CREAT0100 }, |
91 | { P9_DOTL_EXCL00000200, O_EXCL0200 }, |
92 | { P9_DOTL_NOCTTY00000400 , O_NOCTTY0400 }, |
93 | { P9_DOTL_TRUNC00001000, O_TRUNC01000 }, |
94 | { P9_DOTL_APPEND00002000, O_APPEND02000 }, |
95 | { P9_DOTL_NONBLOCK00004000, O_NONBLOCK04000 } , |
96 | { P9_DOTL_DSYNC00010000, O_DSYNC010000 }, |
97 | { P9_DOTL_FASYNC00020000, FASYNC020000 }, |
98 | { P9_DOTL_DIRECT00040000, O_DIRECT040000 }, |
99 | { P9_DOTL_LARGEFILE00100000, O_LARGEFILE0 }, |
100 | { P9_DOTL_DIRECTORY00200000, O_DIRECTORY0200000 }, |
101 | { P9_DOTL_NOFOLLOW00400000, O_NOFOLLOW0400000 }, |
102 | { P9_DOTL_NOATIME01000000, O_NOATIME01000000 }, |
103 | { P9_DOTL_SYNC04000000, O_SYNC010000 }, |
104 | }; |
105 | |
106 | for (i = 0; i < ARRAY_SIZE(dotl_oflag_map)(sizeof(dotl_oflag_map) / sizeof((dotl_oflag_map)[0])); i++) { |
107 | if (flags & dotl_oflag_map[i].dotl_flag) { |
108 | oflags |= dotl_oflag_map[i].open_flag; |
109 | } |
110 | } |
111 | |
112 | return oflags; |
113 | } |
114 | |
115 | void cred_init(FsCred *credp) |
116 | { |
117 | credp->fc_uid = -1; |
118 | credp->fc_gid = -1; |
119 | credp->fc_mode = -1; |
120 | credp->fc_rdev = -1; |
121 | } |
122 | |
123 | static int get_dotl_openflags(V9fsState *s, int oflags) |
124 | { |
125 | int flags; |
126 | /* |
127 | * Filter the client open flags |
128 | */ |
129 | flags = dotl_to_open_flags(oflags); |
130 | flags &= ~(O_NOCTTY0400 | O_ASYNC020000 | O_CREAT0100); |
131 | /* |
132 | * Ignore direct disk access hint until the server supports it. |
133 | */ |
134 | flags &= ~O_DIRECT040000; |
135 | return flags; |
136 | } |
137 | |
138 | void v9fs_path_init(V9fsPath *path) |
139 | { |
140 | path->data = NULL((void*)0); |
141 | path->size = 0; |
142 | } |
143 | |
144 | void v9fs_path_free(V9fsPath *path) |
145 | { |
146 | g_free(path->data); |
147 | path->data = NULL((void*)0); |
148 | path->size = 0; |
149 | } |
150 | |
151 | void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs) |
152 | { |
153 | v9fs_path_free(lhs); |
154 | lhs->data = g_malloc(rhs->size); |
155 | memcpy(lhs->data, rhs->data, rhs->size); |
156 | lhs->size = rhs->size; |
157 | } |
158 | |
159 | int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, |
160 | const char *name, V9fsPath *path) |
161 | { |
162 | int err; |
163 | err = s->ops->name_to_path(&s->ctx, dirpath, name, path); |
164 | if (err < 0) { |
165 | err = -errno(*__errno_location ()); |
166 | } |
167 | return err; |
168 | } |
169 | |
170 | /* |
171 | * Return TRUE if s1 is an ancestor of s2. |
172 | * |
173 | * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". |
174 | * As a special case, We treat s1 as ancestor of s2 if they are same! |
175 | */ |
176 | static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) |
177 | { |
178 | if (!strncmp(s1->data, s2->data, s1->size - 1)) { |
179 | if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { |
180 | return 1; |
181 | } |
182 | } |
183 | return 0; |
184 | } |
185 | |
186 | static size_t v9fs_string_size(V9fsString *str) |
187 | { |
188 | return str->size; |
189 | } |
190 | |
191 | /* |
192 | * returns 0 if fid got re-opened, 1 if not, < 0 on error */ |
193 | static int v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) |
194 | { |
195 | int err = 1; |
196 | if (f->fid_type == P9_FID_FILE) { |
197 | if (f->fs.fd == -1) { |
198 | do { |
199 | err = v9fs_co_open(pdu, f, f->open_flags); |
200 | } while (err == -EINTR4 && !pdu->cancelled); |
201 | } |
202 | } else if (f->fid_type == P9_FID_DIR) { |
203 | if (f->fs.dir == NULL((void*)0)) { |
204 | do { |
205 | err = v9fs_co_opendir(pdu, f); |
206 | } while (err == -EINTR4 && !pdu->cancelled); |
207 | } |
208 | } |
209 | return err; |
210 | } |
211 | |
212 | static V9fsFidState *get_fid(V9fsPDU *pdu, int32_t fid) |
213 | { |
214 | int err; |
215 | V9fsFidState *f; |
216 | V9fsState *s = pdu->s; |
217 | |
218 | for (f = s->fid_list; f; f = f->next) { |
219 | BUG_ON(f->clunked)((!(f->clunked)) ? (void) (0) : __assert_fail ("!(f->clunked)" , "/home/stefan/src/qemu/qemu.org/qemu/hw/9pfs/virtio-9p.c", 219 , __PRETTY_FUNCTION__)); |
220 | if (f->fid == fid) { |
221 | /* |
222 | * Update the fid ref upfront so that |
223 | * we don't get reclaimed when we yield |
224 | * in open later. |
225 | */ |
226 | f->ref++; |
227 | /* |
228 | * check whether we need to reopen the |
229 | * file. We might have closed the fd |
230 | * while trying to free up some file |
231 | * descriptors. |
232 | */ |
233 | err = v9fs_reopen_fid(pdu, f); |
234 | if (err < 0) { |
235 | f->ref--; |
236 | return NULL((void*)0); |
237 | } |
238 | /* |
239 | * Mark the fid as referenced so that the LRU |
240 | * reclaim won't close the file descriptor |
241 | */ |
242 | f->flags |= FID_REFERENCED0x1; |
243 | return f; |
244 | } |
245 | } |
246 | return NULL((void*)0); |
247 | } |
248 | |
249 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) |
250 | { |
251 | V9fsFidState *f; |
252 | |
253 | for (f = s->fid_list; f; f = f->next) { |
254 | /* If fid is already there return NULL */ |
255 | BUG_ON(f->clunked)((!(f->clunked)) ? (void) (0) : __assert_fail ("!(f->clunked)" , "/home/stefan/src/qemu/qemu.org/qemu/hw/9pfs/virtio-9p.c", 255 , __PRETTY_FUNCTION__)); |
256 | if (f->fid == fid) { |
257 | return NULL((void*)0); |
258 | } |
259 | } |
260 | f = g_malloc0(sizeof(V9fsFidState)); |
261 | f->fid = fid; |
262 | f->fid_type = P9_FID_NONE; |
263 | f->ref = 1; |
264 | /* |
265 | * Mark the fid as referenced so that the LRU |
266 | * reclaim won't close the file descriptor |
267 | */ |
268 | f->flags |= FID_REFERENCED0x1; |
269 | f->next = s->fid_list; |
270 | s->fid_list = f; |
271 | |
272 | return f; |
273 | } |
274 | |
275 | static int v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) |
276 | { |
277 | int retval = 0; |
278 | |
279 | if (fidp->fs.xattr.copied_len == -1) { |
280 | /* getxattr/listxattr fid */ |
281 | goto free_value; |
282 | } |
283 | /* |
284 | * if this is fid for setxattr. clunk should |
285 | * result in setxattr localcall |
286 | */ |
287 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { |
288 | /* clunk after partial write */ |
289 | retval = -EINVAL22; |
290 | goto free_out; |
291 | } |
292 | if (fidp->fs.xattr.len) { |
293 | retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, |
294 | fidp->fs.xattr.value, |
295 | fidp->fs.xattr.len, |
296 | fidp->fs.xattr.flags); |
297 | } else { |
298 | retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); |
299 | } |
300 | free_out: |
301 | v9fs_string_free(&fidp->fs.xattr.name); |
302 | free_value: |
303 | if (fidp->fs.xattr.value) { |
304 | g_free(fidp->fs.xattr.value); |
305 | } |
306 | return retval; |
307 | } |
308 | |
309 | static int free_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
310 | { |
311 | int retval = 0; |
312 | |
313 | if (fidp->fid_type == P9_FID_FILE) { |
314 | /* If we reclaimed the fd no need to close */ |
315 | if (fidp->fs.fd != -1) { |
316 | retval = v9fs_co_close(pdu, &fidp->fs); |
317 | } |
318 | } else if (fidp->fid_type == P9_FID_DIR) { |
319 | if (fidp->fs.dir != NULL((void*)0)) { |
320 | retval = v9fs_co_closedir(pdu, &fidp->fs); |
321 | } |
322 | } else if (fidp->fid_type == P9_FID_XATTR) { |
323 | retval = v9fs_xattr_fid_clunk(pdu, fidp); |
324 | } |
325 | v9fs_path_free(&fidp->path); |
326 | g_free(fidp); |
327 | return retval; |
328 | } |
329 | |
330 | static void put_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
331 | { |
332 | BUG_ON(!fidp->ref)((!(!fidp->ref)) ? (void) (0) : __assert_fail ("!(!fidp->ref)" , "/home/stefan/src/qemu/qemu.org/qemu/hw/9pfs/virtio-9p.c", 332 , __PRETTY_FUNCTION__)); |
333 | fidp->ref--; |
334 | /* |
335 | * Don't free the fid if it is in reclaim list |
336 | */ |
337 | if (!fidp->ref && fidp->clunked) { |
338 | if (fidp->fid == pdu->s->root_fid) { |
339 | /* |
340 | * if the clunked fid is root fid then we |
341 | * have unmounted the fs on the client side. |
342 | * delete the migration blocker. Ideally, this |
343 | * should be hooked to transport close notification |
344 | */ |
345 | if (pdu->s->migration_blocker) { |
346 | migrate_del_blocker(pdu->s->migration_blocker); |
347 | error_free(pdu->s->migration_blocker); |
348 | pdu->s->migration_blocker = NULL((void*)0); |
349 | } |
350 | } |
351 | free_fid(pdu, fidp); |
352 | } |
353 | } |
354 | |
355 | static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) |
356 | { |
357 | V9fsFidState **fidpp, *fidp; |
358 | |
359 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { |
360 | if ((*fidpp)->fid == fid) { |
361 | break; |
362 | } |
363 | } |
364 | if (*fidpp == NULL((void*)0)) { |
365 | return NULL((void*)0); |
366 | } |
367 | fidp = *fidpp; |
368 | *fidpp = fidp->next; |
369 | fidp->clunked = 1; |
370 | return fidp; |
371 | } |
372 | |
373 | void v9fs_reclaim_fd(V9fsPDU *pdu) |
374 | { |
375 | int reclaim_count = 0; |
376 | V9fsState *s = pdu->s; |
377 | V9fsFidState *f, *reclaim_list = NULL((void*)0); |
378 | |
379 | for (f = s->fid_list; f; f = f->next) { |
380 | /* |
381 | * Unlink fids cannot be reclaimed. Check |
382 | * for them and skip them. Also skip fids |
383 | * currently being operated on. |
384 | */ |
385 | if (f->ref || f->flags & FID_NON_RECLAIMABLE0x2) { |
386 | continue; |
387 | } |
388 | /* |
389 | * if it is a recently referenced fid |
390 | * we leave the fid untouched and clear the |
391 | * reference bit. We come back to it later |
392 | * in the next iteration. (a simple LRU without |
393 | * moving list elements around) |
394 | */ |
395 | if (f->flags & FID_REFERENCED0x1) { |
396 | f->flags &= ~FID_REFERENCED0x1; |
397 | continue; |
398 | } |
399 | /* |
400 | * Add fids to reclaim list. |
401 | */ |
402 | if (f->fid_type == P9_FID_FILE) { |
403 | if (f->fs.fd != -1) { |
404 | /* |
405 | * Up the reference count so that |
406 | * a clunk request won't free this fid |
407 | */ |
408 | f->ref++; |
409 | f->rclm_lst = reclaim_list; |
410 | reclaim_list = f; |
411 | f->fs_reclaim.fd = f->fs.fd; |
412 | f->fs.fd = -1; |
413 | reclaim_count++; |
414 | } |
415 | } else if (f->fid_type == P9_FID_DIR) { |
416 | if (f->fs.dir != NULL((void*)0)) { |
417 | /* |
418 | * Up the reference count so that |
419 | * a clunk request won't free this fid |
420 | */ |
421 | f->ref++; |
422 | f->rclm_lst = reclaim_list; |
423 | reclaim_list = f; |
424 | f->fs_reclaim.dir = f->fs.dir; |
425 | f->fs.dir = NULL((void*)0); |
426 | reclaim_count++; |
427 | } |
428 | } |
429 | if (reclaim_count >= open_fd_rc) { |
430 | break; |
431 | } |
432 | } |
433 | /* |
434 | * Now close the fid in reclaim list. Free them if they |
435 | * are already clunked. |
436 | */ |
437 | while (reclaim_list) { |
438 | f = reclaim_list; |
439 | reclaim_list = f->rclm_lst; |
440 | if (f->fid_type == P9_FID_FILE) { |
441 | v9fs_co_close(pdu, &f->fs_reclaim); |
442 | } else if (f->fid_type == P9_FID_DIR) { |
443 | v9fs_co_closedir(pdu, &f->fs_reclaim); |
444 | } |
445 | f->rclm_lst = NULL((void*)0); |
446 | /* |
447 | * Now drop the fid reference, free it |
448 | * if clunked. |
449 | */ |
450 | put_fid(pdu, f); |
451 | } |
452 | } |
453 | |
454 | static int v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) |
455 | { |
456 | int err; |
457 | V9fsState *s = pdu->s; |
458 | V9fsFidState *fidp, head_fid; |
459 | |
460 | head_fid.next = s->fid_list; |
461 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { |
462 | if (fidp->path.size != path->size) { |
463 | continue; |
464 | } |
465 | if (!memcmp(fidp->path.data, path->data, path->size)) { |
466 | /* Mark the fid non reclaimable. */ |
467 | fidp->flags |= FID_NON_RECLAIMABLE0x2; |
468 | |
469 | /* reopen the file/dir if already closed */ |
470 | err = v9fs_reopen_fid(pdu, fidp); |
471 | if (err < 0) { |
472 | return -1; |
473 | } |
474 | /* |
475 | * Go back to head of fid list because |
476 | * the list could have got updated when |
477 | * switched to the worker thread |
478 | */ |
479 | if (err == 0) { |
480 | fidp = &head_fid; |
481 | } |
482 | } |
483 | } |
484 | return 0; |
485 | } |
486 | |
487 | static void virtfs_reset(V9fsPDU *pdu) |
488 | { |
489 | V9fsState *s = pdu->s; |
490 | V9fsFidState *fidp = NULL((void*)0); |
491 | |
492 | /* Free all fids */ |
493 | while (s->fid_list) { |
494 | fidp = s->fid_list; |
495 | s->fid_list = fidp->next; |
496 | |
497 | if (fidp->ref) { |
498 | fidp->clunked = 1; |
499 | } else { |
500 | free_fid(pdu, fidp); |
501 | } |
502 | } |
503 | if (fidp) { |
504 | /* One or more unclunked fids found... */ |
505 | error_report("9pfs:%s: One or more uncluncked fids " |
506 | "found during reset", __func__); |
507 | } |
508 | return; |
509 | } |
510 | |
511 | #define P9_QID_TYPE_DIR0x80 0x80 |
512 | #define P9_QID_TYPE_SYMLINK0x02 0x02 |
513 | |
514 | #define P9_STAT_MODE_DIR0x80000000 0x80000000 |
515 | #define P9_STAT_MODE_APPEND0x40000000 0x40000000 |
516 | #define P9_STAT_MODE_EXCL0x20000000 0x20000000 |
517 | #define P9_STAT_MODE_MOUNT0x10000000 0x10000000 |
518 | #define P9_STAT_MODE_AUTH0x08000000 0x08000000 |
519 | #define P9_STAT_MODE_TMP0x04000000 0x04000000 |
520 | #define P9_STAT_MODE_SYMLINK0x02000000 0x02000000 |
521 | #define P9_STAT_MODE_LINK0x01000000 0x01000000 |
522 | #define P9_STAT_MODE_DEVICE0x00800000 0x00800000 |
523 | #define P9_STAT_MODE_NAMED_PIPE0x00200000 0x00200000 |
524 | #define P9_STAT_MODE_SOCKET0x00100000 0x00100000 |
525 | #define P9_STAT_MODE_SETUID0x00080000 0x00080000 |
526 | #define P9_STAT_MODE_SETGID0x00040000 0x00040000 |
527 | #define P9_STAT_MODE_SETVTX0x00010000 0x00010000 |
528 | |
529 | #define P9_STAT_MODE_TYPE_BITS(0x80000000 | 0x02000000 | 0x01000000 | 0x00800000 | 0x00200000 | 0x00100000) (P9_STAT_MODE_DIR0x80000000 | \ |
530 | P9_STAT_MODE_SYMLINK0x02000000 | \ |
531 | P9_STAT_MODE_LINK0x01000000 | \ |
532 | P9_STAT_MODE_DEVICE0x00800000 | \ |
533 | P9_STAT_MODE_NAMED_PIPE0x00200000 | \ |
534 | P9_STAT_MODE_SOCKET0x00100000) |
535 | |
536 | /* This is the algorithm from ufs in spfs */ |
537 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
538 | { |
539 | size_t size; |
540 | |
541 | memset(&qidp->path, 0, sizeof(qidp->path)); |
542 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path))(((sizeof(stbuf->st_ino)) < (sizeof(qidp->path))) ? ( sizeof(stbuf->st_ino)) : (sizeof(qidp->path))); |
543 | memcpy(&qidp->path, &stbuf->st_ino, size); |
544 | qidp->version = stbuf->st_mtimest_mtim.tv_sec ^ (stbuf->st_size << 8); |
545 | qidp->type = 0; |
546 | if (S_ISDIR(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0040000))) { |
547 | qidp->type |= P9_QID_TYPE_DIR0x80; |
548 | } |
549 | if (S_ISLNK(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0120000))) { |
550 | qidp->type |= P9_QID_TYPE_SYMLINK0x02; |
551 | } |
552 | } |
553 | |
554 | static int fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, V9fsQID *qidp) |
555 | { |
556 | struct stat stbuf; |
557 | int err; |
558 | |
559 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
560 | if (err < 0) { |
561 | return err; |
562 | } |
563 | stat_to_qid(&stbuf, qidp); |
564 | return 0; |
565 | } |
566 | |
567 | static V9fsPDU *alloc_pdu(V9fsState *s) |
568 | { |
569 | V9fsPDU *pdu = NULL((void*)0); |
570 | |
571 | if (!QLIST_EMPTY(&s->free_list)((&s->free_list)->lh_first == ((void*)0))) { |
572 | pdu = QLIST_FIRST(&s->free_list)((&s->free_list)->lh_first); |
573 | QLIST_REMOVE(pdu, next)do { if ((pdu)->next.le_next != ((void*)0)) (pdu)->next .le_next->next.le_prev = (pdu)->next.le_prev; *(pdu)-> next.le_prev = (pdu)->next.le_next; } while ( 0); |
574 | QLIST_INSERT_HEAD(&s->active_list, pdu, next)do { if (((pdu)->next.le_next = (&s->active_list)-> lh_first) != ((void*)0)) (&s->active_list)->lh_first ->next.le_prev = &(pdu)->next.le_next; (&s-> active_list)->lh_first = (pdu); (pdu)->next.le_prev = & (&s->active_list)->lh_first; } while ( 0); |
575 | } |
576 | return pdu; |
577 | } |
578 | |
579 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
580 | { |
581 | if (pdu) { |
582 | /* |
583 | * Cancelled pdu are added back to the freelist |
584 | * by flush request . |
585 | */ |
586 | if (!pdu->cancelled) { |
587 | QLIST_REMOVE(pdu, next)do { if ((pdu)->next.le_next != ((void*)0)) (pdu)->next .le_next->next.le_prev = (pdu)->next.le_prev; *(pdu)-> next.le_prev = (pdu)->next.le_next; } while ( 0); |
588 | QLIST_INSERT_HEAD(&s->free_list, pdu, next)do { if (((pdu)->next.le_next = (&s->free_list)-> lh_first) != ((void*)0)) (&s->free_list)->lh_first-> next.le_prev = &(pdu)->next.le_next; (&s->free_list )->lh_first = (pdu); (pdu)->next.le_prev = &(&s ->free_list)->lh_first; } while ( 0); |
589 | } |
590 | } |
591 | } |
592 | |
593 | /* |
594 | * We don't do error checking for pdu_marshal/unmarshal here |
595 | * because we always expect to have enough space to encode |
596 | * error details |
597 | */ |
598 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
599 | { |
600 | int8_t id = pdu->id + 1; /* Response */ |
601 | |
602 | if (len < 0) { |
603 | int err = -len; |
604 | len = 7; |
605 | |
606 | if (s->proto_version != V9FS_PROTO_2000L) { |
607 | V9fsString str; |
608 | |
609 | str.data = strerror(err); |
610 | str.size = strlen(str.data); |
611 | |
612 | len += pdu_marshal(pdu, len, "s", &str)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, len, 1, "s", &str); |
613 | id = P9_RERROR; |
614 | } |
615 | |
616 | len += pdu_marshal(pdu, len, "d", err)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, len, 1, "d", err); |
617 | |
618 | if (s->proto_version == V9FS_PROTO_2000L) { |
619 | id = P9_RLERROR; |
620 | } |
621 | trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ |
622 | } |
623 | |
624 | /* fill out the header */ |
625 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, 0, 1, "dbw" , (int32_t)len, id, pdu->tag); |
626 | |
627 | /* keep these in sync */ |
628 | pdu->size = len; |
629 | pdu->id = id; |
630 | |
631 | /* push onto queue and notify */ |
632 | virtqueue_push(s->vq, &pdu->elem, len); |
633 | |
634 | /* FIXME: we should batch these completions */ |
635 | virtio_notify(&s->vdev, s->vq); |
636 | |
637 | /* Now wakeup anybody waiting in flush for this request */ |
638 | qemu_co_queue_next(&pdu->complete); |
639 | |
640 | free_pdu(s, pdu); |
641 | } |
642 | |
643 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
644 | { |
645 | mode_t ret; |
646 | |
647 | ret = mode & 0777; |
648 | if (mode & P9_STAT_MODE_DIR0x80000000) { |
649 | ret |= S_IFDIR0040000; |
650 | } |
651 | |
652 | if (mode & P9_STAT_MODE_SYMLINK0x02000000) { |
653 | ret |= S_IFLNK0120000; |
654 | } |
655 | if (mode & P9_STAT_MODE_SOCKET0x00100000) { |
656 | ret |= S_IFSOCK0140000; |
657 | } |
658 | if (mode & P9_STAT_MODE_NAMED_PIPE0x00200000) { |
659 | ret |= S_IFIFO0010000; |
660 | } |
661 | if (mode & P9_STAT_MODE_DEVICE0x00800000) { |
662 | if (extension && extension->data[0] == 'c') { |
663 | ret |= S_IFCHR0020000; |
664 | } else { |
665 | ret |= S_IFBLK0060000; |
666 | } |
667 | } |
668 | |
669 | if (!(ret&~0777)) { |
670 | ret |= S_IFREG0100000; |
671 | } |
672 | |
673 | if (mode & P9_STAT_MODE_SETUID0x00080000) { |
674 | ret |= S_ISUID04000; |
675 | } |
676 | if (mode & P9_STAT_MODE_SETGID0x00040000) { |
677 | ret |= S_ISGID02000; |
678 | } |
679 | if (mode & P9_STAT_MODE_SETVTX0x00010000) { |
680 | ret |= S_ISVTX01000; |
681 | } |
682 | |
683 | return ret; |
684 | } |
685 | |
686 | static int donttouch_stat(V9fsStat *stat) |
687 | { |
688 | if (stat->type == -1 && |
689 | stat->dev == -1 && |
690 | stat->qid.type == -1 && |
691 | stat->qid.version == -1 && |
692 | stat->qid.path == -1 && |
693 | stat->mode == -1 && |
694 | stat->atime == -1 && |
695 | stat->mtime == -1 && |
696 | stat->length == -1 && |
697 | !stat->name.size && |
698 | !stat->uid.size && |
699 | !stat->gid.size && |
700 | !stat->muid.size && |
701 | stat->n_uid == -1 && |
702 | stat->n_gid == -1 && |
703 | stat->n_muid == -1) { |
704 | return 1; |
705 | } |
706 | |
707 | return 0; |
708 | } |
709 | |
710 | static void v9fs_stat_init(V9fsStat *stat) |
711 | { |
712 | v9fs_string_init(&stat->name); |
713 | v9fs_string_init(&stat->uid); |
714 | v9fs_string_init(&stat->gid); |
715 | v9fs_string_init(&stat->muid); |
716 | v9fs_string_init(&stat->extension); |
717 | } |
718 | |
719 | static void v9fs_stat_free(V9fsStat *stat) |
720 | { |
721 | v9fs_string_free(&stat->name); |
722 | v9fs_string_free(&stat->uid); |
723 | v9fs_string_free(&stat->gid); |
724 | v9fs_string_free(&stat->muid); |
725 | v9fs_string_free(&stat->extension); |
726 | } |
727 | |
728 | static uint32_t stat_to_v9mode(const struct stat *stbuf) |
729 | { |
730 | uint32_t mode; |
731 | |
732 | mode = stbuf->st_mode & 0777; |
733 | if (S_ISDIR(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0040000))) { |
734 | mode |= P9_STAT_MODE_DIR0x80000000; |
735 | } |
736 | |
737 | if (S_ISLNK(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0120000))) { |
738 | mode |= P9_STAT_MODE_SYMLINK0x02000000; |
739 | } |
740 | |
741 | if (S_ISSOCK(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0140000))) { |
742 | mode |= P9_STAT_MODE_SOCKET0x00100000; |
743 | } |
744 | |
745 | if (S_ISFIFO(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0010000))) { |
746 | mode |= P9_STAT_MODE_NAMED_PIPE0x00200000; |
747 | } |
748 | |
749 | if (S_ISBLK(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0060000)) || S_ISCHR(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0020000))) { |
750 | mode |= P9_STAT_MODE_DEVICE0x00800000; |
751 | } |
752 | |
753 | if (stbuf->st_mode & S_ISUID04000) { |
754 | mode |= P9_STAT_MODE_SETUID0x00080000; |
755 | } |
756 | |
757 | if (stbuf->st_mode & S_ISGID02000) { |
758 | mode |= P9_STAT_MODE_SETGID0x00040000; |
759 | } |
760 | |
761 | if (stbuf->st_mode & S_ISVTX01000) { |
762 | mode |= P9_STAT_MODE_SETVTX0x00010000; |
763 | } |
764 | |
765 | return mode; |
766 | } |
767 | |
768 | static int stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name, |
769 | const struct stat *stbuf, |
770 | V9fsStat *v9stat) |
771 | { |
772 | int err; |
773 | const char *str; |
774 | |
775 | memset(v9stat, 0, sizeof(*v9stat)); |
776 | |
777 | stat_to_qid(stbuf, &v9stat->qid); |
778 | v9stat->mode = stat_to_v9mode(stbuf); |
779 | v9stat->atime = stbuf->st_atimest_atim.tv_sec; |
780 | v9stat->mtime = stbuf->st_mtimest_mtim.tv_sec; |
781 | v9stat->length = stbuf->st_size; |
782 | |
783 | v9fs_string_null(&v9stat->uid); |
784 | v9fs_string_null(&v9stat->gid); |
785 | v9fs_string_null(&v9stat->muid); |
786 | |
787 | v9stat->n_uid = stbuf->st_uid; |
788 | v9stat->n_gid = stbuf->st_gid; |
789 | v9stat->n_muid = 0; |
790 | |
791 | v9fs_string_null(&v9stat->extension); |
792 | |
793 | if (v9stat->mode & P9_STAT_MODE_SYMLINK0x02000000) { |
794 | err = v9fs_co_readlink(pdu, name, &v9stat->extension); |
795 | if (err < 0) { |
796 | return err; |
797 | } |
798 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE0x00800000) { |
799 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", |
800 | S_ISCHR(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0020000)) ? 'c' : 'b', |
801 | major(stbuf->st_rdev)gnu_dev_major (stbuf->st_rdev), minor(stbuf->st_rdev)gnu_dev_minor (stbuf->st_rdev)); |
802 | } else if (S_ISDIR(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0040000)) || S_ISREG(stbuf->st_mode)((((stbuf->st_mode)) & 0170000) == (0100000))) { |
803 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
804 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); |
805 | } |
806 | |
807 | str = strrchr(name->data, '/'); |
808 | if (str) { |
809 | str += 1; |
810 | } else { |
811 | str = name->data; |
812 | } |
813 | |
814 | v9fs_string_sprintf(&v9stat->name, "%s", str); |
815 | |
816 | v9stat->size = 61 + |
817 | v9fs_string_size(&v9stat->name) + |
818 | v9fs_string_size(&v9stat->uid) + |
819 | v9fs_string_size(&v9stat->gid) + |
820 | v9fs_string_size(&v9stat->muid) + |
821 | v9fs_string_size(&v9stat->extension); |
822 | return 0; |
823 | } |
824 | |
825 | #define P9_STATS_MODE0x00000001ULL 0x00000001ULL |
826 | #define P9_STATS_NLINK0x00000002ULL 0x00000002ULL |
827 | #define P9_STATS_UID0x00000004ULL 0x00000004ULL |
828 | #define P9_STATS_GID0x00000008ULL 0x00000008ULL |
829 | #define P9_STATS_RDEV0x00000010ULL 0x00000010ULL |
830 | #define P9_STATS_ATIME0x00000020ULL 0x00000020ULL |
831 | #define P9_STATS_MTIME0x00000040ULL 0x00000040ULL |
832 | #define P9_STATS_CTIME0x00000080ULL 0x00000080ULL |
833 | #define P9_STATS_INO0x00000100ULL 0x00000100ULL |
834 | #define P9_STATS_SIZE0x00000200ULL 0x00000200ULL |
835 | #define P9_STATS_BLOCKS0x00000400ULL 0x00000400ULL |
836 | |
837 | #define P9_STATS_BTIME0x00000800ULL 0x00000800ULL |
838 | #define P9_STATS_GEN0x00001000ULL 0x00001000ULL |
839 | #define P9_STATS_DATA_VERSION0x00002000ULL 0x00002000ULL |
840 | |
841 | #define P9_STATS_BASIC0x000007ffULL 0x000007ffULL /* Mask for fields up to BLOCKS */ |
842 | #define P9_STATS_ALL0x00003fffULL 0x00003fffULL /* Mask for All fields above */ |
843 | |
844 | |
845 | static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, |
846 | V9fsStatDotl *v9lstat) |
847 | { |
848 | memset(v9lstat, 0, sizeof(*v9lstat)); |
849 | |
850 | v9lstat->st_mode = stbuf->st_mode; |
851 | v9lstat->st_nlink = stbuf->st_nlink; |
852 | v9lstat->st_uid = stbuf->st_uid; |
853 | v9lstat->st_gid = stbuf->st_gid; |
854 | v9lstat->st_rdev = stbuf->st_rdev; |
855 | v9lstat->st_size = stbuf->st_size; |
856 | v9lstat->st_blksize = stbuf->st_blksize; |
857 | v9lstat->st_blocks = stbuf->st_blocks; |
858 | v9lstat->st_atime_sec = stbuf->st_atimest_atim.tv_sec; |
859 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; |
860 | v9lstat->st_mtime_sec = stbuf->st_mtimest_mtim.tv_sec; |
861 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; |
862 | v9lstat->st_ctime_sec = stbuf->st_ctimest_ctim.tv_sec; |
863 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; |
864 | /* Currently we only support BASIC fields in stat */ |
865 | v9lstat->st_result_mask = P9_STATS_BASIC0x000007ffULL; |
866 | |
867 | stat_to_qid(stbuf, &v9lstat->qid); |
868 | } |
869 | |
870 | static void print_sg(struct iovec *sg, int cnt) |
871 | { |
872 | int i; |
873 | |
874 | printf("sg[%d]: {", cnt); |
875 | for (i = 0; i < cnt; i++) { |
876 | if (i) { |
877 | printf(", "); |
878 | } |
879 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); |
880 | } |
881 | printf("}\n"); |
882 | } |
883 | |
884 | /* Will call this only for path name based fid */ |
885 | static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) |
886 | { |
887 | V9fsPath str; |
888 | v9fs_path_init(&str); |
889 | v9fs_path_copy(&str, dst); |
890 | v9fs_string_sprintf((V9fsString *)dst, "%s%s", src->data, str.data+len); |
891 | v9fs_path_free(&str); |
892 | /* +1 to include terminating NULL */ |
893 | dst->size++; |
894 | } |
895 | |
896 | static inline bool_Bool is_ro_export(FsContext *ctx) |
897 | { |
898 | return ctx->export_flags & V9FS_RDONLY0x00000040; |
899 | } |
900 | |
901 | static void v9fs_version(void *opaque) |
902 | { |
903 | ssize_t err; |
904 | V9fsPDU *pdu = opaque; |
905 | V9fsState *s = pdu->s; |
906 | V9fsString version; |
907 | size_t offset = 7; |
908 | |
909 | v9fs_string_init(&version); |
910 | err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "ds", &s->msize, &version); |
911 | if (err < 0) { |
912 | offset = err; |
913 | goto out; |
914 | } |
915 | trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); |
916 | |
917 | virtfs_reset(pdu); |
918 | |
919 | if (!strcmp(version.data, "9P2000.u")) { |
920 | s->proto_version = V9FS_PROTO_2000U; |
921 | } else if (!strcmp(version.data, "9P2000.L")) { |
922 | s->proto_version = V9FS_PROTO_2000L; |
923 | } else { |
924 | v9fs_string_sprintf(&version, "unknown"); |
925 | } |
926 | |
927 | err = pdu_marshal(pdu, offset, "ds", s->msize, &version)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "ds", s->msize, &version); |
928 | if (err < 0) { |
929 | offset = err; |
930 | goto out; |
931 | } |
932 | offset += err; |
933 | trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); |
934 | out: |
935 | complete_pdu(s, pdu, offset); |
936 | v9fs_string_free(&version); |
937 | return; |
938 | } |
939 | |
940 | static void v9fs_attach(void *opaque) |
941 | { |
942 | V9fsPDU *pdu = opaque; |
943 | V9fsState *s = pdu->s; |
944 | int32_t fid, afid, n_uname; |
945 | V9fsString uname, aname; |
946 | V9fsFidState *fidp; |
947 | size_t offset = 7; |
948 | V9fsQID qid; |
949 | ssize_t err; |
950 | |
951 | v9fs_string_init(&uname); |
952 | v9fs_string_init(&aname); |
953 | err = pdu_unmarshal(pdu, offset, "ddssd", &fid,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "ddssd", &fid, &afid, &uname, &aname, & n_uname) |
954 | &afid, &uname, &aname, &n_uname)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "ddssd", &fid, &afid, &uname, &aname, & n_uname); |
955 | if (err < 0) { |
956 | goto out_nofid; |
957 | } |
958 | trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); |
959 | |
960 | fidp = alloc_fid(s, fid); |
961 | if (fidp == NULL((void*)0)) { |
962 | err = -EINVAL22; |
963 | goto out_nofid; |
964 | } |
965 | fidp->uid = n_uname; |
966 | err = v9fs_co_name_to_path(pdu, NULL((void*)0), "/", &fidp->path); |
967 | if (err < 0) { |
968 | err = -EINVAL22; |
969 | clunk_fid(s, fid); |
970 | goto out; |
971 | } |
972 | err = fid_to_qid(pdu, fidp, &qid); |
973 | if (err < 0) { |
974 | err = -EINVAL22; |
975 | clunk_fid(s, fid); |
976 | goto out; |
977 | } |
978 | err = pdu_marshal(pdu, offset, "Q", &qid)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "Q", &qid); |
979 | if (err < 0) { |
980 | clunk_fid(s, fid); |
981 | goto out; |
982 | } |
983 | err += offset; |
984 | trace_v9fs_attach_return(pdu->tag, pdu->id, |
985 | qid.type, qid.version, qid.path); |
986 | s->root_fid = fid; |
987 | /* disable migration */ |
988 | error_set(&s->migration_blocker, QERR_VIRTFS_FEATURE_BLOCKS_MIGRATION"{ 'class': 'VirtFSFeatureBlocksMigration', 'data': { 'path': %s, 'tag': %s } }", |
989 | s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); |
990 | migrate_add_blocker(s->migration_blocker); |
991 | out: |
992 | put_fid(pdu, fidp); |
993 | out_nofid: |
994 | complete_pdu(s, pdu, err); |
995 | v9fs_string_free(&uname); |
996 | v9fs_string_free(&aname); |
997 | } |
998 | |
999 | static void v9fs_stat(void *opaque) |
1000 | { |
1001 | int32_t fid; |
1002 | V9fsStat v9stat; |
1003 | ssize_t err = 0; |
1004 | size_t offset = 7; |
1005 | struct stat stbuf; |
1006 | V9fsFidState *fidp; |
1007 | V9fsPDU *pdu = opaque; |
1008 | V9fsState *s = pdu->s; |
1009 | |
1010 | err = pdu_unmarshal(pdu, offset, "d", &fid)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "d", &fid); |
1011 | if (err < 0) { |
1012 | goto out_nofid; |
1013 | } |
1014 | trace_v9fs_stat(pdu->tag, pdu->id, fid); |
1015 | |
1016 | fidp = get_fid(pdu, fid); |
1017 | if (fidp == NULL((void*)0)) { |
1018 | err = -ENOENT2; |
1019 | goto out_nofid; |
1020 | } |
1021 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
1022 | if (err < 0) { |
1023 | goto out; |
1024 | } |
1025 | err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat); |
1026 | if (err < 0) { |
1027 | goto out; |
1028 | } |
1029 | err = pdu_marshal(pdu, offset, "wS", 0, &v9stat)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "wS", 0, &v9stat); |
1030 | if (err < 0) { |
1031 | v9fs_stat_free(&v9stat); |
1032 | goto out; |
1033 | } |
1034 | trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, |
1035 | v9stat.atime, v9stat.mtime, v9stat.length); |
1036 | err += offset; |
1037 | v9fs_stat_free(&v9stat); |
1038 | out: |
1039 | put_fid(pdu, fidp); |
1040 | out_nofid: |
1041 | complete_pdu(s, pdu, err); |
1042 | } |
1043 | |
1044 | static void v9fs_getattr(void *opaque) |
1045 | { |
1046 | int32_t fid; |
1047 | size_t offset = 7; |
1048 | ssize_t retval = 0; |
1049 | struct stat stbuf; |
1050 | V9fsFidState *fidp; |
1051 | uint64_t request_mask; |
1052 | V9fsStatDotl v9stat_dotl; |
1053 | V9fsPDU *pdu = opaque; |
1054 | V9fsState *s = pdu->s; |
1055 | |
1056 | retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dq", &fid, &request_mask); |
1057 | if (retval < 0) { |
1058 | goto out_nofid; |
1059 | } |
1060 | trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); |
1061 | |
1062 | fidp = get_fid(pdu, fid); |
1063 | if (fidp == NULL((void*)0)) { |
1064 | retval = -ENOENT2; |
1065 | goto out_nofid; |
1066 | } |
1067 | /* |
1068 | * Currently we only support BASIC fields in stat, so there is no |
1069 | * need to look at request_mask. |
1070 | */ |
1071 | retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
1072 | if (retval < 0) { |
1073 | goto out; |
1074 | } |
1075 | stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); |
1076 | |
1077 | /* fill st_gen if requested and supported by underlying fs */ |
1078 | if (request_mask & P9_STATS_GEN0x00001000ULL) { |
1079 | retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); |
1080 | if (retval < 0) { |
1081 | goto out; |
1082 | } |
1083 | v9stat_dotl.st_result_mask |= P9_STATS_GEN0x00001000ULL; |
1084 | } |
1085 | retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "A", &v9stat_dotl); |
1086 | if (retval < 0) { |
1087 | goto out; |
1088 | } |
1089 | retval += offset; |
1090 | trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, |
1091 | v9stat_dotl.st_mode, v9stat_dotl.st_uid, |
1092 | v9stat_dotl.st_gid); |
1093 | out: |
1094 | put_fid(pdu, fidp); |
1095 | out_nofid: |
1096 | complete_pdu(s, pdu, retval); |
1097 | } |
1098 | |
1099 | /* Attribute flags */ |
1100 | #define P9_ATTR_MODE(1 << 0) (1 << 0) |
1101 | #define P9_ATTR_UID(1 << 1) (1 << 1) |
1102 | #define P9_ATTR_GID(1 << 2) (1 << 2) |
1103 | #define P9_ATTR_SIZE(1 << 3) (1 << 3) |
1104 | #define P9_ATTR_ATIME(1 << 4) (1 << 4) |
1105 | #define P9_ATTR_MTIME(1 << 5) (1 << 5) |
1106 | #define P9_ATTR_CTIME(1 << 6) (1 << 6) |
1107 | #define P9_ATTR_ATIME_SET(1 << 7) (1 << 7) |
1108 | #define P9_ATTR_MTIME_SET(1 << 8) (1 << 8) |
1109 | |
1110 | #define P9_ATTR_MASK127 127 |
1111 | |
1112 | static void v9fs_setattr(void *opaque) |
1113 | { |
1114 | int err = 0; |
1115 | int32_t fid; |
1116 | V9fsFidState *fidp; |
1117 | size_t offset = 7; |
1118 | V9fsIattr v9iattr; |
1119 | V9fsPDU *pdu = opaque; |
1120 | V9fsState *s = pdu->s; |
1121 | |
1122 | err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dI", &fid, &v9iattr); |
1123 | if (err < 0) { |
1124 | goto out_nofid; |
1125 | } |
1126 | |
1127 | fidp = get_fid(pdu, fid); |
1128 | if (fidp == NULL((void*)0)) { |
1129 | err = -EINVAL22; |
1130 | goto out_nofid; |
1131 | } |
1132 | if (v9iattr.valid & P9_ATTR_MODE(1 << 0)) { |
1133 | err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); |
1134 | if (err < 0) { |
1135 | goto out; |
1136 | } |
1137 | } |
1138 | if (v9iattr.valid & (P9_ATTR_ATIME(1 << 4) | P9_ATTR_MTIME(1 << 5))) { |
1139 | struct timespec times[2]; |
1140 | if (v9iattr.valid & P9_ATTR_ATIME(1 << 4)) { |
1141 | if (v9iattr.valid & P9_ATTR_ATIME_SET(1 << 7)) { |
1142 | times[0].tv_sec = v9iattr.atime_sec; |
1143 | times[0].tv_nsec = v9iattr.atime_nsec; |
1144 | } else { |
1145 | times[0].tv_nsec = UTIME_NOW((1l << 30) - 1l); |
1146 | } |
1147 | } else { |
1148 | times[0].tv_nsec = UTIME_OMIT((1l << 30) - 2l); |
1149 | } |
1150 | if (v9iattr.valid & P9_ATTR_MTIME(1 << 5)) { |
1151 | if (v9iattr.valid & P9_ATTR_MTIME_SET(1 << 8)) { |
1152 | times[1].tv_sec = v9iattr.mtime_sec; |
1153 | times[1].tv_nsec = v9iattr.mtime_nsec; |
1154 | } else { |
1155 | times[1].tv_nsec = UTIME_NOW((1l << 30) - 1l); |
1156 | } |
1157 | } else { |
1158 | times[1].tv_nsec = UTIME_OMIT((1l << 30) - 2l); |
1159 | } |
1160 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
1161 | if (err < 0) { |
1162 | goto out; |
1163 | } |
1164 | } |
1165 | /* |
1166 | * If the only valid entry in iattr is ctime we can call |
1167 | * chown(-1,-1) to update the ctime of the file |
1168 | */ |
1169 | if ((v9iattr.valid & (P9_ATTR_UID(1 << 1) | P9_ATTR_GID(1 << 2))) || |
1170 | ((v9iattr.valid & P9_ATTR_CTIME(1 << 6)) |
1171 | && !((v9iattr.valid & P9_ATTR_MASK127) & ~P9_ATTR_CTIME(1 << 6)))) { |
1172 | if (!(v9iattr.valid & P9_ATTR_UID(1 << 1))) { |
1173 | v9iattr.uid = -1; |
1174 | } |
1175 | if (!(v9iattr.valid & P9_ATTR_GID(1 << 2))) { |
1176 | v9iattr.gid = -1; |
1177 | } |
1178 | err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, |
1179 | v9iattr.gid); |
1180 | if (err < 0) { |
1181 | goto out; |
1182 | } |
1183 | } |
1184 | if (v9iattr.valid & (P9_ATTR_SIZE(1 << 3))) { |
1185 | err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); |
1186 | if (err < 0) { |
1187 | goto out; |
1188 | } |
1189 | } |
1190 | err = offset; |
1191 | out: |
1192 | put_fid(pdu, fidp); |
1193 | out_nofid: |
1194 | complete_pdu(s, pdu, err); |
1195 | } |
1196 | |
1197 | static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) |
1198 | { |
1199 | int i; |
1200 | ssize_t err; |
1201 | size_t offset = 7; |
1202 | |
1203 | err = pdu_marshal(pdu, offset, "w", nwnames)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "w", nwnames); |
1204 | if (err < 0) { |
1205 | return err; |
1206 | } |
1207 | offset += err; |
1208 | for (i = 0; i < nwnames; i++) { |
1209 | err = pdu_marshal(pdu, offset, "Q", &qids[i])v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "Q", &qids[i]); |
1210 | if (err < 0) { |
1211 | return err; |
1212 | } |
1213 | offset += err; |
1214 | } |
1215 | return offset; |
1216 | } |
1217 | |
1218 | static void v9fs_walk(void *opaque) |
1219 | { |
1220 | int name_idx; |
1221 | V9fsQID *qids = NULL((void*)0); |
1222 | int i, err = 0; |
1223 | V9fsPath dpath, path; |
1224 | uint16_t nwnames; |
1225 | struct stat stbuf; |
1226 | size_t offset = 7; |
1227 | int32_t fid, newfid; |
1228 | V9fsString *wnames = NULL((void*)0); |
1229 | V9fsFidState *fidp; |
1230 | V9fsFidState *newfidp = NULL((void*)0); |
1231 | V9fsPDU *pdu = opaque; |
1232 | V9fsState *s = pdu->s; |
1233 | |
1234 | err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "ddw", &fid, &newfid, &nwnames); |
1235 | if (err < 0) { |
1236 | complete_pdu(s, pdu, err); |
1237 | return ; |
1238 | } |
1239 | offset += err; |
1240 | |
1241 | trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); |
1242 | |
1243 | if (nwnames && nwnames <= P9_MAXWELEM16) { |
1244 | wnames = g_malloc0(sizeof(wnames[0]) * nwnames); |
1245 | qids = g_malloc0(sizeof(qids[0]) * nwnames); |
1246 | for (i = 0; i < nwnames; i++) { |
1247 | err = pdu_unmarshal(pdu, offset, "s", &wnames[i])v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "s", &wnames[i]); |
1248 | if (err < 0) { |
1249 | goto out_nofid; |
1250 | } |
1251 | offset += err; |
1252 | } |
1253 | } else if (nwnames > P9_MAXWELEM16) { |
1254 | err = -EINVAL22; |
1255 | goto out_nofid; |
1256 | } |
1257 | fidp = get_fid(pdu, fid); |
1258 | if (fidp == NULL((void*)0)) { |
1259 | err = -ENOENT2; |
1260 | goto out_nofid; |
1261 | } |
1262 | v9fs_path_init(&dpath); |
1263 | v9fs_path_init(&path); |
1264 | /* |
1265 | * Both dpath and path initially poin to fidp. |
1266 | * Needed to handle request with nwnames == 0 |
1267 | */ |
1268 | v9fs_path_copy(&dpath, &fidp->path); |
1269 | v9fs_path_copy(&path, &fidp->path); |
1270 | for (name_idx = 0; name_idx < nwnames; name_idx++) { |
1271 | err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, &path); |
1272 | if (err < 0) { |
1273 | goto out; |
1274 | } |
1275 | err = v9fs_co_lstat(pdu, &path, &stbuf); |
1276 | if (err < 0) { |
1277 | goto out; |
1278 | } |
1279 | stat_to_qid(&stbuf, &qids[name_idx]); |
1280 | v9fs_path_copy(&dpath, &path); |
1281 | } |
1282 | if (fid == newfid) { |
1283 | BUG_ON(fidp->fid_type != P9_FID_NONE)((!(fidp->fid_type != P9_FID_NONE)) ? (void) (0) : __assert_fail ("!(fidp->fid_type != P9_FID_NONE)", "/home/stefan/src/qemu/qemu.org/qemu/hw/9pfs/virtio-9p.c" , 1283, __PRETTY_FUNCTION__)); |
1284 | v9fs_path_copy(&fidp->path, &path); |
1285 | } else { |
1286 | newfidp = alloc_fid(s, newfid); |
1287 | if (newfidp == NULL((void*)0)) { |
1288 | err = -EINVAL22; |
1289 | goto out; |
1290 | } |
1291 | newfidp->uid = fidp->uid; |
1292 | v9fs_path_copy(&newfidp->path, &path); |
1293 | } |
1294 | err = v9fs_walk_marshal(pdu, nwnames, qids); |
1295 | trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); |
1296 | out: |
1297 | put_fid(pdu, fidp); |
1298 | if (newfidp) { |
1299 | put_fid(pdu, newfidp); |
1300 | } |
1301 | v9fs_path_free(&dpath); |
1302 | v9fs_path_free(&path); |
1303 | out_nofid: |
1304 | complete_pdu(s, pdu, err); |
1305 | if (nwnames && nwnames <= P9_MAXWELEM16) { |
1306 | for (name_idx = 0; name_idx < nwnames; name_idx++) { |
1307 | v9fs_string_free(&wnames[name_idx]); |
1308 | } |
1309 | g_free(wnames); |
1310 | g_free(qids); |
1311 | } |
1312 | return; |
1313 | } |
1314 | |
1315 | static int32_t get_iounit(V9fsPDU *pdu, V9fsPath *path) |
1316 | { |
1317 | struct statfs stbuf; |
1318 | int32_t iounit = 0; |
1319 | V9fsState *s = pdu->s; |
1320 | |
1321 | /* |
1322 | * iounit should be multiples of f_bsize (host filesystem block size |
1323 | * and as well as less than (client msize - P9_IOHDRSZ)) |
1324 | */ |
1325 | if (!v9fs_co_statfs(pdu, path, &stbuf)) { |
1326 | iounit = stbuf.f_bsize; |
1327 | iounit *= (s->msize - P9_IOHDRSZ24)/stbuf.f_bsize; |
1328 | } |
1329 | if (!iounit) { |
1330 | iounit = s->msize - P9_IOHDRSZ24; |
1331 | } |
1332 | return iounit; |
1333 | } |
1334 | |
1335 | static void v9fs_open(void *opaque) |
1336 | { |
1337 | int flags; |
1338 | int32_t fid; |
1339 | int32_t mode; |
1340 | V9fsQID qid; |
1341 | int iounit = 0; |
1342 | ssize_t err = 0; |
1343 | size_t offset = 7; |
1344 | struct stat stbuf; |
1345 | V9fsFidState *fidp; |
1346 | V9fsPDU *pdu = opaque; |
1347 | V9fsState *s = pdu->s; |
1348 | |
1349 | if (s->proto_version == V9FS_PROTO_2000L) { |
1350 | err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dd", &fid, &mode); |
1351 | } else { |
1352 | uint8_t modebyte; |
1353 | err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "db", &fid, &modebyte); |
1354 | mode = modebyte; |
1355 | } |
1356 | if (err < 0) { |
1357 | goto out_nofid; |
1358 | } |
1359 | trace_v9fs_open(pdu->tag, pdu->id, fid, mode); |
1360 | |
1361 | fidp = get_fid(pdu, fid); |
1362 | if (fidp == NULL((void*)0)) { |
1363 | err = -ENOENT2; |
1364 | goto out_nofid; |
1365 | } |
1366 | BUG_ON(fidp->fid_type != P9_FID_NONE)((!(fidp->fid_type != P9_FID_NONE)) ? (void) (0) : __assert_fail ("!(fidp->fid_type != P9_FID_NONE)", "/home/stefan/src/qemu/qemu.org/qemu/hw/9pfs/virtio-9p.c" , 1366, __PRETTY_FUNCTION__)); |
1367 | |
1368 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
1369 | if (err < 0) { |
1370 | goto out; |
1371 | } |
1372 | stat_to_qid(&stbuf, &qid); |
1373 | if (S_ISDIR(stbuf.st_mode)((((stbuf.st_mode)) & 0170000) == (0040000))) { |
1374 | err = v9fs_co_opendir(pdu, fidp); |
1375 | if (err < 0) { |
1376 | goto out; |
1377 | } |
1378 | fidp->fid_type = P9_FID_DIR; |
1379 | err = pdu_marshal(pdu, offset, "Qd", &qid, 0)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "Qd", &qid, 0); |
1380 | if (err < 0) { |
1381 | goto out; |
1382 | } |
1383 | err += offset; |
1384 | } else { |
1385 | if (s->proto_version == V9FS_PROTO_2000L) { |
1386 | flags = get_dotl_openflags(s, mode); |
1387 | } else { |
1388 | flags = omode_to_uflags(mode); |
1389 | } |
1390 | if (is_ro_export(&s->ctx)) { |
1391 | if (mode & O_WRONLY01 || mode & O_RDWR02 || |
1392 | mode & O_APPEND02000 || mode & O_TRUNC01000) { |
1393 | err = -EROFS30; |
1394 | goto out; |
1395 | } |
1396 | } |
1397 | err = v9fs_co_open(pdu, fidp, flags); |
1398 | if (err < 0) { |
1399 | goto out; |
1400 | } |
1401 | fidp->fid_type = P9_FID_FILE; |
1402 | fidp->open_flags = flags; |
1403 | if (flags & O_EXCL0200) { |
1404 | /* |
1405 | * We let the host file system do O_EXCL check |
1406 | * We should not reclaim such fd |
1407 | */ |
1408 | fidp->flags |= FID_NON_RECLAIMABLE0x2; |
1409 | } |
1410 | iounit = get_iounit(pdu, &fidp->path); |
1411 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "Qd", &qid, iounit); |
1412 | if (err < 0) { |
1413 | goto out; |
1414 | } |
1415 | err += offset; |
1416 | } |
1417 | trace_v9fs_open_return(pdu->tag, pdu->id, |
1418 | qid.type, qid.version, qid.path, iounit); |
1419 | out: |
1420 | put_fid(pdu, fidp); |
1421 | out_nofid: |
1422 | complete_pdu(s, pdu, err); |
1423 | } |
1424 | |
1425 | static void v9fs_lcreate(void *opaque) |
1426 | { |
1427 | int32_t dfid, flags, mode; |
1428 | gid_t gid; |
1429 | ssize_t err = 0; |
1430 | ssize_t offset = 7; |
1431 | V9fsString name; |
1432 | V9fsFidState *fidp; |
1433 | struct stat stbuf; |
1434 | V9fsQID qid; |
1435 | int32_t iounit; |
1436 | V9fsPDU *pdu = opaque; |
1437 | |
1438 | v9fs_string_init(&name); |
1439 | err = pdu_unmarshal(pdu, offset, "dsddd", &dfid,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsddd", &dfid, &name, &flags, &mode, & gid) |
1440 | &name, &flags, &mode, &gid)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsddd", &dfid, &name, &flags, &mode, & gid); |
1441 | if (err < 0) { |
1442 | goto out_nofid; |
1443 | } |
1444 | trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); |
1445 | |
1446 | fidp = get_fid(pdu, dfid); |
1447 | if (fidp == NULL((void*)0)) { |
1448 | err = -ENOENT2; |
1449 | goto out_nofid; |
1450 | } |
1451 | |
1452 | flags = get_dotl_openflags(pdu->s, flags); |
1453 | err = v9fs_co_open2(pdu, fidp, &name, gid, |
1454 | flags | O_CREAT0100, mode, &stbuf); |
1455 | if (err < 0) { |
1456 | goto out; |
1457 | } |
1458 | fidp->fid_type = P9_FID_FILE; |
1459 | fidp->open_flags = flags; |
1460 | if (flags & O_EXCL0200) { |
1461 | /* |
1462 | * We let the host file system do O_EXCL check |
1463 | * We should not reclaim such fd |
1464 | */ |
1465 | fidp->flags |= FID_NON_RECLAIMABLE0x2; |
1466 | } |
1467 | iounit = get_iounit(pdu, &fidp->path); |
1468 | stat_to_qid(&stbuf, &qid); |
1469 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "Qd", &qid, iounit); |
1470 | if (err < 0) { |
1471 | goto out; |
1472 | } |
1473 | err += offset; |
1474 | trace_v9fs_lcreate_return(pdu->tag, pdu->id, |
1475 | qid.type, qid.version, qid.path, iounit); |
1476 | out: |
1477 | put_fid(pdu, fidp); |
1478 | out_nofid: |
1479 | complete_pdu(pdu->s, pdu, err); |
1480 | v9fs_string_free(&name); |
1481 | } |
1482 | |
1483 | static void v9fs_fsync(void *opaque) |
1484 | { |
1485 | int err; |
1486 | int32_t fid; |
1487 | int datasync; |
1488 | size_t offset = 7; |
1489 | V9fsFidState *fidp; |
1490 | V9fsPDU *pdu = opaque; |
1491 | V9fsState *s = pdu->s; |
1492 | |
1493 | err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dd", &fid, &datasync); |
1494 | if (err < 0) { |
1495 | goto out_nofid; |
1496 | } |
1497 | trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); |
1498 | |
1499 | fidp = get_fid(pdu, fid); |
1500 | if (fidp == NULL((void*)0)) { |
1501 | err = -ENOENT2; |
1502 | goto out_nofid; |
1503 | } |
1504 | err = v9fs_co_fsync(pdu, fidp, datasync); |
1505 | if (!err) { |
1506 | err = offset; |
1507 | } |
1508 | put_fid(pdu, fidp); |
1509 | out_nofid: |
1510 | complete_pdu(s, pdu, err); |
1511 | } |
1512 | |
1513 | static void v9fs_clunk(void *opaque) |
1514 | { |
1515 | int err; |
1516 | int32_t fid; |
1517 | size_t offset = 7; |
1518 | V9fsFidState *fidp; |
1519 | V9fsPDU *pdu = opaque; |
1520 | V9fsState *s = pdu->s; |
1521 | |
1522 | err = pdu_unmarshal(pdu, offset, "d", &fid)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "d", &fid); |
1523 | if (err < 0) { |
1524 | goto out_nofid; |
1525 | } |
1526 | trace_v9fs_clunk(pdu->tag, pdu->id, fid); |
1527 | |
1528 | fidp = clunk_fid(s, fid); |
1529 | if (fidp == NULL((void*)0)) { |
1530 | err = -ENOENT2; |
1531 | goto out_nofid; |
1532 | } |
1533 | /* |
1534 | * Bump the ref so that put_fid will |
1535 | * free the fid. |
1536 | */ |
1537 | fidp->ref++; |
1538 | err = offset; |
1539 | |
1540 | put_fid(pdu, fidp); |
1541 | out_nofid: |
1542 | complete_pdu(s, pdu, err); |
1543 | } |
1544 | |
1545 | static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
1546 | uint64_t off, uint32_t max_count) |
1547 | { |
1548 | ssize_t err; |
1549 | size_t offset = 7; |
1550 | int read_count; |
1551 | int64_t xattr_len; |
1552 | |
1553 | xattr_len = fidp->fs.xattr.len; |
1554 | read_count = xattr_len - off; |
1555 | if (read_count > max_count) { |
1556 | read_count = max_count; |
1557 | } else if (read_count < 0) { |
1558 | /* |
1559 | * read beyond XATTR value |
1560 | */ |
1561 | read_count = 0; |
1562 | } |
1563 | err = pdu_marshal(pdu, offset, "d", read_count)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "d", read_count); |
1564 | if (err < 0) { |
1565 | return err; |
1566 | } |
1567 | offset += err; |
1568 | err = v9fs_pack(pdu->elem.in_sg, pdu->elem.in_num, offset, |
1569 | ((char *)fidp->fs.xattr.value) + off, |
1570 | read_count); |
1571 | if (err < 0) { |
1572 | return err; |
1573 | } |
1574 | offset += err; |
1575 | return offset; |
1576 | } |
1577 | |
1578 | static int v9fs_do_readdir_with_stat(V9fsPDU *pdu, |
1579 | V9fsFidState *fidp, uint32_t max_count) |
1580 | { |
1581 | V9fsPath path; |
1582 | V9fsStat v9stat; |
1583 | int len, err = 0; |
1584 | int32_t count = 0; |
1585 | struct stat stbuf; |
1586 | off_t saved_dir_pos; |
1587 | struct dirent *dent, *result; |
1588 | |
1589 | /* save the directory position */ |
1590 | saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
1591 | if (saved_dir_pos < 0) { |
1592 | return saved_dir_pos; |
1593 | } |
1594 | |
1595 | dent = g_malloc(sizeof(struct dirent)); |
1596 | |
1597 | while (1) { |
1598 | v9fs_path_init(&path); |
1599 | err = v9fs_co_readdir_r(pdu, fidp, dent, &result); |
1600 | if (err || !result) { |
1601 | break; |
1602 | } |
1603 | err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); |
1604 | if (err < 0) { |
1605 | goto out; |
1606 | } |
1607 | err = v9fs_co_lstat(pdu, &path, &stbuf); |
1608 | if (err < 0) { |
1609 | goto out; |
1610 | } |
1611 | err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat); |
1612 | if (err < 0) { |
1613 | goto out; |
1614 | } |
1615 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
1616 | len = pdu_marshal(pdu, 11 + count, "S", &v9stat)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, 11 + count , 1, "S", &v9stat); |
1617 | if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) { |
1618 | /* Ran out of buffer. Set dir back to old position and return */ |
1619 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
1620 | v9fs_stat_free(&v9stat); |
1621 | v9fs_path_free(&path); |
1622 | g_free(dent); |
1623 | return count; |
1624 | } |
1625 | count += len; |
1626 | v9fs_stat_free(&v9stat); |
1627 | v9fs_path_free(&path); |
1628 | saved_dir_pos = dent->d_off; |
1629 | } |
1630 | out: |
1631 | g_free(dent); |
1632 | v9fs_path_free(&path); |
1633 | if (err < 0) { |
1634 | return err; |
1635 | } |
1636 | return count; |
1637 | } |
1638 | |
1639 | /* |
1640 | * Create a QEMUIOVector for a sub-region of PDU iovecs |
1641 | * |
1642 | * @qiov: uninitialized QEMUIOVector |
1643 | * @skip: number of bytes to skip from beginning of PDU |
1644 | * @size: number of bytes to include |
1645 | * @is_write: true - write, false - read |
1646 | * |
1647 | * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up |
1648 | * with qemu_iovec_destroy(). |
1649 | */ |
1650 | static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, |
1651 | uint64_t skip, size_t size, |
1652 | bool_Bool is_write) |
1653 | { |
1654 | QEMUIOVector elem; |
1655 | struct iovec *iov; |
1656 | unsigned int niov; |
1657 | |
1658 | if (is_write) { |
1659 | iov = pdu->elem.out_sg; |
1660 | niov = pdu->elem.out_num; |
1661 | } else { |
1662 | iov = pdu->elem.in_sg; |
1663 | niov = pdu->elem.in_num; |
1664 | } |
1665 | |
1666 | qemu_iovec_init_external(&elem, iov, niov); |
1667 | qemu_iovec_init(qiov, niov); |
1668 | qemu_iovec_copy(qiov, &elem, skip, size); |
1669 | } |
1670 | |
1671 | static void v9fs_read(void *opaque) |
1672 | { |
1673 | int32_t fid; |
1674 | uint64_t off; |
1675 | ssize_t err = 0; |
1676 | int32_t count = 0; |
1677 | size_t offset = 7; |
1678 | uint32_t max_count; |
1679 | V9fsFidState *fidp; |
1680 | V9fsPDU *pdu = opaque; |
1681 | V9fsState *s = pdu->s; |
1682 | |
1683 | err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dqd", &fid, &off, &max_count); |
1684 | if (err < 0) { |
1685 | goto out_nofid; |
1686 | } |
1687 | trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); |
1688 | |
1689 | fidp = get_fid(pdu, fid); |
1690 | if (fidp == NULL((void*)0)) { |
1691 | err = -EINVAL22; |
1692 | goto out_nofid; |
1693 | } |
1694 | if (fidp->fid_type == P9_FID_DIR) { |
1695 | |
1696 | if (off == 0) { |
1697 | v9fs_co_rewinddir(pdu, fidp); |
1698 | } |
1699 | count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); |
1700 | if (count < 0) { |
1701 | err = count; |
1702 | goto out; |
1703 | } |
1704 | err = pdu_marshal(pdu, offset, "d", count)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "d", count); |
1705 | if (err < 0) { |
1706 | goto out; |
1707 | } |
1708 | err += offset + count; |
1709 | } else if (fidp->fid_type == P9_FID_FILE) { |
1710 | QEMUIOVector qiov_full; |
1711 | QEMUIOVector qiov; |
1712 | int32_t len; |
1713 | |
1714 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false0); |
1715 | qemu_iovec_init(&qiov, qiov_full.niov); |
1716 | do { |
1717 | qemu_iovec_reset(&qiov); |
1718 | qemu_iovec_copy(&qiov, &qiov_full, count, qiov_full.size - count); |
1719 | if (0) { |
1720 | print_sg(qiov.iov, qiov.niov); |
1721 | } |
1722 | /* Loop in case of EINTR */ |
1723 | do { |
1724 | len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); |
1725 | if (len >= 0) { |
1726 | off += len; |
1727 | count += len; |
1728 | } |
1729 | } while (len == -EINTR4 && !pdu->cancelled); |
1730 | if (len < 0) { |
1731 | /* IO error return the error */ |
1732 | err = len; |
1733 | goto out; |
1734 | } |
1735 | } while (count < max_count && len > 0); |
1736 | err = pdu_marshal(pdu, offset, "d", count)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "d", count); |
1737 | if (err < 0) { |
1738 | goto out; |
1739 | } |
1740 | err += offset + count; |
1741 | qemu_iovec_destroy(&qiov); |
1742 | qemu_iovec_destroy(&qiov_full); |
1743 | } else if (fidp->fid_type == P9_FID_XATTR) { |
1744 | err = v9fs_xattr_read(s, pdu, fidp, off, max_count); |
1745 | } else { |
1746 | err = -EINVAL22; |
1747 | } |
1748 | trace_v9fs_read_return(pdu->tag, pdu->id, count, err); |
1749 | out: |
1750 | put_fid(pdu, fidp); |
1751 | out_nofid: |
1752 | complete_pdu(s, pdu, err); |
1753 | } |
1754 | |
1755 | static size_t v9fs_readdir_data_size(V9fsString *name) |
1756 | { |
1757 | /* |
1758 | * Size of each dirent on the wire: size of qid (13) + size of offset (8) |
1759 | * size of type (1) + size of name.size (2) + strlen(name.data) |
1760 | */ |
1761 | return 24 + v9fs_string_size(name); |
1762 | } |
1763 | |
1764 | static int v9fs_do_readdir(V9fsPDU *pdu, |
1765 | V9fsFidState *fidp, int32_t max_count) |
1766 | { |
1767 | size_t size; |
1768 | V9fsQID qid; |
1769 | V9fsString name; |
1770 | int len, err = 0; |
1771 | int32_t count = 0; |
1772 | off_t saved_dir_pos; |
1773 | struct dirent *dent, *result; |
1774 | |
1775 | /* save the directory position */ |
1776 | saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
1777 | if (saved_dir_pos < 0) { |
1778 | return saved_dir_pos; |
1779 | } |
1780 | |
1781 | dent = g_malloc(sizeof(struct dirent)); |
1782 | |
1783 | while (1) { |
1784 | err = v9fs_co_readdir_r(pdu, fidp, dent, &result); |
1785 | if (err || !result) { |
1786 | break; |
1787 | } |
1788 | v9fs_string_init(&name); |
1789 | v9fs_string_sprintf(&name, "%s", dent->d_name); |
1790 | if ((count + v9fs_readdir_data_size(&name)) > max_count) { |
1791 | /* Ran out of buffer. Set dir back to old position and return */ |
1792 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
1793 | v9fs_string_free(&name); |
1794 | g_free(dent); |
1795 | return count; |
1796 | } |
1797 | /* |
1798 | * Fill up just the path field of qid because the client uses |
1799 | * only that. To fill the entire qid structure we will have |
1800 | * to stat each dirent found, which is expensive |
1801 | */ |
1802 | size = MIN(sizeof(dent->d_ino), sizeof(qid.path))(((sizeof(dent->d_ino)) < (sizeof(qid.path))) ? (sizeof (dent->d_ino)) : (sizeof(qid.path))); |
1803 | memcpy(&qid.path, &dent->d_ino, size); |
1804 | /* Fill the other fields with dummy values */ |
1805 | qid.type = 0; |
1806 | qid.version = 0; |
1807 | |
1808 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
1809 | len = pdu_marshal(pdu, 11 + count, "Qqbs",v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, 11 + count , 1, "Qqbs", &qid, dent->d_off, dent->d_type, & name) |
1810 | &qid, dent->d_off,v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, 11 + count , 1, "Qqbs", &qid, dent->d_off, dent->d_type, & name) |
1811 | dent->d_type, &name)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, 11 + count , 1, "Qqbs", &qid, dent->d_off, dent->d_type, & name); |
1812 | if (len < 0) { |
1813 | v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
1814 | v9fs_string_free(&name); |
1815 | g_free(dent); |
1816 | return len; |
1817 | } |
1818 | count += len; |
1819 | v9fs_string_free(&name); |
1820 | saved_dir_pos = dent->d_off; |
1821 | } |
1822 | g_free(dent); |
1823 | if (err < 0) { |
1824 | return err; |
1825 | } |
1826 | return count; |
1827 | } |
1828 | |
1829 | static void v9fs_readdir(void *opaque) |
1830 | { |
1831 | int32_t fid; |
1832 | V9fsFidState *fidp; |
1833 | ssize_t retval = 0; |
1834 | size_t offset = 7; |
1835 | uint64_t initial_offset; |
1836 | int32_t count; |
1837 | uint32_t max_count; |
1838 | V9fsPDU *pdu = opaque; |
1839 | V9fsState *s = pdu->s; |
1840 | |
1841 | retval = pdu_unmarshal(pdu, offset, "dqd", &fid,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dqd", &fid, &initial_offset, &max_count) |
1842 | &initial_offset, &max_count)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dqd", &fid, &initial_offset, &max_count); |
1843 | if (retval < 0) { |
1844 | goto out_nofid; |
1845 | } |
1846 | trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); |
1847 | |
1848 | fidp = get_fid(pdu, fid); |
1849 | if (fidp == NULL((void*)0)) { |
1850 | retval = -EINVAL22; |
1851 | goto out_nofid; |
1852 | } |
1853 | if (!fidp->fs.dir) { |
1854 | retval = -EINVAL22; |
1855 | goto out; |
1856 | } |
1857 | if (initial_offset == 0) { |
1858 | v9fs_co_rewinddir(pdu, fidp); |
1859 | } else { |
1860 | v9fs_co_seekdir(pdu, fidp, initial_offset); |
1861 | } |
1862 | count = v9fs_do_readdir(pdu, fidp, max_count); |
1863 | if (count < 0) { |
1864 | retval = count; |
1865 | goto out; |
1866 | } |
1867 | retval = pdu_marshal(pdu, offset, "d", count)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "d", count); |
1868 | if (retval < 0) { |
1869 | goto out; |
1870 | } |
1871 | retval += count + offset; |
1872 | trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); |
1873 | out: |
1874 | put_fid(pdu, fidp); |
1875 | out_nofid: |
1876 | complete_pdu(s, pdu, retval); |
1877 | } |
1878 | |
1879 | static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
1880 | uint64_t off, uint32_t count, |
1881 | struct iovec *sg, int cnt) |
1882 | { |
1883 | int i, to_copy; |
1884 | ssize_t err = 0; |
1885 | int write_count; |
1886 | int64_t xattr_len; |
1887 | size_t offset = 7; |
1888 | |
1889 | |
1890 | xattr_len = fidp->fs.xattr.len; |
1891 | write_count = xattr_len - off; |
1892 | if (write_count > count) { |
1893 | write_count = count; |
1894 | } else if (write_count < 0) { |
1895 | /* |
1896 | * write beyond XATTR value len specified in |
1897 | * xattrcreate |
1898 | */ |
1899 | err = -ENOSPC28; |
1900 | goto out; |
1901 | } |
1902 | err = pdu_marshal(pdu, offset, "d", write_count)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "d", write_count); |
1903 | if (err < 0) { |
1904 | return err; |
1905 | } |
1906 | err += offset; |
1907 | fidp->fs.xattr.copied_len += write_count; |
1908 | /* |
1909 | * Now copy the content from sg list |
1910 | */ |
1911 | for (i = 0; i < cnt; i++) { |
1912 | if (write_count > sg[i].iov_len) { |
1913 | to_copy = sg[i].iov_len; |
1914 | } else { |
1915 | to_copy = write_count; |
1916 | } |
1917 | memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); |
1918 | /* updating vs->off since we are not using below */ |
1919 | off += to_copy; |
1920 | write_count -= to_copy; |
1921 | } |
1922 | out: |
1923 | return err; |
1924 | } |
1925 | |
1926 | static void v9fs_write(void *opaque) |
1927 | { |
1928 | ssize_t err; |
1929 | int32_t fid; |
1930 | uint64_t off; |
1931 | uint32_t count; |
1932 | int32_t len = 0; |
1933 | int32_t total = 0; |
1934 | size_t offset = 7; |
1935 | V9fsFidState *fidp; |
1936 | V9fsPDU *pdu = opaque; |
1937 | V9fsState *s = pdu->s; |
1938 | QEMUIOVector qiov_full; |
1939 | QEMUIOVector qiov; |
1940 | |
1941 | err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dqd", &fid, &off, &count); |
1942 | if (err < 0) { |
1943 | return complete_pdu(s, pdu, err); |
1944 | } |
1945 | offset += err; |
1946 | v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true1); |
1947 | trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); |
1948 | |
1949 | fidp = get_fid(pdu, fid); |
1950 | if (fidp == NULL((void*)0)) { |
1951 | err = -EINVAL22; |
1952 | goto out_nofid; |
1953 | } |
1954 | if (fidp->fid_type == P9_FID_FILE) { |
1955 | if (fidp->fs.fd == -1) { |
1956 | err = -EINVAL22; |
1957 | goto out; |
1958 | } |
1959 | } else if (fidp->fid_type == P9_FID_XATTR) { |
1960 | /* |
1961 | * setxattr operation |
1962 | */ |
1963 | err = v9fs_xattr_write(s, pdu, fidp, off, count, |
1964 | qiov_full.iov, qiov_full.niov); |
1965 | goto out; |
1966 | } else { |
1967 | err = -EINVAL22; |
1968 | goto out; |
1969 | } |
1970 | qemu_iovec_init(&qiov, qiov_full.niov); |
1971 | do { |
1972 | qemu_iovec_reset(&qiov); |
1973 | qemu_iovec_copy(&qiov, &qiov_full, total, qiov_full.size - total); |
1974 | if (0) { |
1975 | print_sg(qiov.iov, qiov.niov); |
1976 | } |
1977 | /* Loop in case of EINTR */ |
1978 | do { |
1979 | len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); |
1980 | if (len >= 0) { |
1981 | off += len; |
1982 | total += len; |
1983 | } |
1984 | } while (len == -EINTR4 && !pdu->cancelled); |
1985 | if (len < 0) { |
1986 | /* IO error return the error */ |
1987 | err = len; |
1988 | goto out_qiov; |
1989 | } |
1990 | } while (total < count && len > 0); |
1991 | |
1992 | offset = 7; |
1993 | err = pdu_marshal(pdu, offset, "d", total)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "d", total); |
1994 | if (err < 0) { |
1995 | goto out; |
1996 | } |
1997 | err += offset; |
1998 | trace_v9fs_write_return(pdu->tag, pdu->id, total, err); |
1999 | out_qiov: |
2000 | qemu_iovec_destroy(&qiov); |
2001 | out: |
2002 | put_fid(pdu, fidp); |
2003 | out_nofid: |
2004 | qemu_iovec_destroy(&qiov_full); |
2005 | complete_pdu(s, pdu, err); |
2006 | } |
2007 | |
2008 | static void v9fs_create(void *opaque) |
2009 | { |
2010 | int32_t fid; |
2011 | int err = 0; |
2012 | size_t offset = 7; |
2013 | V9fsFidState *fidp; |
2014 | V9fsQID qid; |
2015 | int32_t perm; |
2016 | int8_t mode; |
2017 | V9fsPath path; |
2018 | struct stat stbuf; |
2019 | V9fsString name; |
2020 | V9fsString extension; |
2021 | int iounit; |
2022 | V9fsPDU *pdu = opaque; |
2023 | |
2024 | v9fs_path_init(&path); |
2025 | v9fs_string_init(&name); |
2026 | v9fs_string_init(&extension); |
2027 | err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsdbs", &fid, &name, &perm, &mode, & extension) |
2028 | &perm, &mode, &extension)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsdbs", &fid, &name, &perm, &mode, & extension); |
2029 | if (err < 0) { |
2030 | goto out_nofid; |
2031 | } |
2032 | trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); |
2033 | |
2034 | fidp = get_fid(pdu, fid); |
2035 | if (fidp == NULL((void*)0)) { |
2036 | err = -EINVAL22; |
2037 | goto out_nofid; |
2038 | } |
2039 | if (perm & P9_STAT_MODE_DIR0x80000000) { |
2040 | err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, |
2041 | fidp->uid, -1, &stbuf); |
2042 | if (err < 0) { |
2043 | goto out; |
2044 | } |
2045 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2046 | if (err < 0) { |
2047 | goto out; |
2048 | } |
2049 | v9fs_path_copy(&fidp->path, &path); |
2050 | err = v9fs_co_opendir(pdu, fidp); |
2051 | if (err < 0) { |
2052 | goto out; |
2053 | } |
2054 | fidp->fid_type = P9_FID_DIR; |
2055 | } else if (perm & P9_STAT_MODE_SYMLINK0x02000000) { |
2056 | err = v9fs_co_symlink(pdu, fidp, &name, |
2057 | extension.data, -1 , &stbuf); |
2058 | if (err < 0) { |
2059 | goto out; |
2060 | } |
2061 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2062 | if (err < 0) { |
2063 | goto out; |
2064 | } |
2065 | v9fs_path_copy(&fidp->path, &path); |
2066 | } else if (perm & P9_STAT_MODE_LINK0x01000000) { |
2067 | int32_t ofid = atoi(extension.data); |
2068 | V9fsFidState *ofidp = get_fid(pdu, ofid); |
2069 | if (ofidp == NULL((void*)0)) { |
2070 | err = -EINVAL22; |
2071 | goto out; |
2072 | } |
2073 | err = v9fs_co_link(pdu, ofidp, fidp, &name); |
2074 | put_fid(pdu, ofidp); |
2075 | if (err < 0) { |
2076 | goto out; |
2077 | } |
2078 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2079 | if (err < 0) { |
2080 | fidp->fid_type = P9_FID_NONE; |
2081 | goto out; |
2082 | } |
2083 | v9fs_path_copy(&fidp->path, &path); |
2084 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
2085 | if (err < 0) { |
2086 | fidp->fid_type = P9_FID_NONE; |
2087 | goto out; |
2088 | } |
2089 | } else if (perm & P9_STAT_MODE_DEVICE0x00800000) { |
2090 | char ctype; |
2091 | uint32_t major, minor; |
2092 | mode_t nmode = 0; |
2093 | |
2094 | if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { |
2095 | err = -errno(*__errno_location ()); |
2096 | goto out; |
2097 | } |
2098 | |
2099 | switch (ctype) { |
2100 | case 'c': |
2101 | nmode = S_IFCHR0020000; |
2102 | break; |
2103 | case 'b': |
2104 | nmode = S_IFBLK0060000; |
2105 | break; |
2106 | default: |
2107 | err = -EIO5; |
2108 | goto out; |
2109 | } |
2110 | |
2111 | nmode |= perm & 0777; |
2112 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
2113 | makedev(major, minor)gnu_dev_makedev (major, minor), nmode, &stbuf); |
2114 | if (err < 0) { |
2115 | goto out; |
2116 | } |
2117 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2118 | if (err < 0) { |
2119 | goto out; |
2120 | } |
2121 | v9fs_path_copy(&fidp->path, &path); |
2122 | } else if (perm & P9_STAT_MODE_NAMED_PIPE0x00200000) { |
2123 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
2124 | 0, S_IFIFO0010000 | (perm & 0777), &stbuf); |
2125 | if (err < 0) { |
2126 | goto out; |
2127 | } |
2128 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2129 | if (err < 0) { |
2130 | goto out; |
2131 | } |
2132 | v9fs_path_copy(&fidp->path, &path); |
2133 | } else if (perm & P9_STAT_MODE_SOCKET0x00100000) { |
2134 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, |
2135 | 0, S_IFSOCK0140000 | (perm & 0777), &stbuf); |
2136 | if (err < 0) { |
2137 | goto out; |
2138 | } |
2139 | err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
2140 | if (err < 0) { |
2141 | goto out; |
2142 | } |
2143 | v9fs_path_copy(&fidp->path, &path); |
2144 | } else { |
2145 | err = v9fs_co_open2(pdu, fidp, &name, -1, |
2146 | omode_to_uflags(mode)|O_CREAT0100, perm, &stbuf); |
2147 | if (err < 0) { |
2148 | goto out; |
2149 | } |
2150 | fidp->fid_type = P9_FID_FILE; |
2151 | fidp->open_flags = omode_to_uflags(mode); |
2152 | if (fidp->open_flags & O_EXCL0200) { |
2153 | /* |
2154 | * We let the host file system do O_EXCL check |
2155 | * We should not reclaim such fd |
2156 | */ |
2157 | fidp->flags |= FID_NON_RECLAIMABLE0x2; |
2158 | } |
2159 | } |
2160 | iounit = get_iounit(pdu, &fidp->path); |
2161 | stat_to_qid(&stbuf, &qid); |
2162 | err = pdu_marshal(pdu, offset, "Qd", &qid, iounit)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "Qd", &qid, iounit); |
2163 | if (err < 0) { |
2164 | goto out; |
2165 | } |
2166 | err += offset; |
2167 | trace_v9fs_create_return(pdu->tag, pdu->id, |
2168 | qid.type, qid.version, qid.path, iounit); |
2169 | out: |
2170 | put_fid(pdu, fidp); |
2171 | out_nofid: |
2172 | complete_pdu(pdu->s, pdu, err); |
2173 | v9fs_string_free(&name); |
2174 | v9fs_string_free(&extension); |
2175 | v9fs_path_free(&path); |
2176 | } |
2177 | |
2178 | static void v9fs_symlink(void *opaque) |
2179 | { |
2180 | V9fsPDU *pdu = opaque; |
2181 | V9fsString name; |
2182 | V9fsString symname; |
2183 | V9fsFidState *dfidp; |
2184 | V9fsQID qid; |
2185 | struct stat stbuf; |
2186 | int32_t dfid; |
2187 | int err = 0; |
2188 | gid_t gid; |
2189 | size_t offset = 7; |
2190 | |
2191 | v9fs_string_init(&name); |
2192 | v9fs_string_init(&symname); |
2193 | err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dssd", &dfid, &name, &symname, &gid); |
2194 | if (err < 0) { |
2195 | goto out_nofid; |
2196 | } |
2197 | trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); |
2198 | |
2199 | dfidp = get_fid(pdu, dfid); |
2200 | if (dfidp == NULL((void*)0)) { |
2201 | err = -EINVAL22; |
2202 | goto out_nofid; |
2203 | } |
2204 | err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); |
2205 | if (err < 0) { |
2206 | goto out; |
2207 | } |
2208 | stat_to_qid(&stbuf, &qid); |
2209 | err = pdu_marshal(pdu, offset, "Q", &qid)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "Q", &qid); |
2210 | if (err < 0) { |
2211 | goto out; |
2212 | } |
2213 | err += offset; |
2214 | trace_v9fs_symlink_return(pdu->tag, pdu->id, |
2215 | qid.type, qid.version, qid.path); |
2216 | out: |
2217 | put_fid(pdu, dfidp); |
2218 | out_nofid: |
2219 | complete_pdu(pdu->s, pdu, err); |
2220 | v9fs_string_free(&name); |
2221 | v9fs_string_free(&symname); |
2222 | } |
2223 | |
2224 | static void v9fs_flush(void *opaque) |
2225 | { |
2226 | ssize_t err; |
2227 | int16_t tag; |
2228 | size_t offset = 7; |
2229 | V9fsPDU *cancel_pdu; |
2230 | V9fsPDU *pdu = opaque; |
2231 | V9fsState *s = pdu->s; |
2232 | |
2233 | err = pdu_unmarshal(pdu, offset, "w", &tag)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "w", &tag); |
2234 | if (err < 0) { |
2235 | complete_pdu(s, pdu, err); |
2236 | return; |
2237 | } |
2238 | trace_v9fs_flush(pdu->tag, pdu->id, tag); |
2239 | |
2240 | QLIST_FOREACH(cancel_pdu, &s->active_list, next)for ((cancel_pdu) = ((&s->active_list)->lh_first); ( cancel_pdu); (cancel_pdu) = ((cancel_pdu)->next.le_next)) { |
2241 | if (cancel_pdu->tag == tag) { |
2242 | break; |
2243 | } |
2244 | } |
2245 | if (cancel_pdu) { |
2246 | cancel_pdu->cancelled = 1; |
2247 | /* |
2248 | * Wait for pdu to complete. |
2249 | */ |
2250 | qemu_co_queue_wait(&cancel_pdu->complete); |
2251 | cancel_pdu->cancelled = 0; |
2252 | free_pdu(pdu->s, cancel_pdu); |
2253 | } |
2254 | complete_pdu(s, pdu, 7); |
2255 | return; |
2256 | } |
2257 | |
2258 | static void v9fs_link(void *opaque) |
2259 | { |
2260 | V9fsPDU *pdu = opaque; |
2261 | V9fsState *s = pdu->s; |
2262 | int32_t dfid, oldfid; |
2263 | V9fsFidState *dfidp, *oldfidp; |
2264 | V9fsString name; |
2265 | size_t offset = 7; |
2266 | int err = 0; |
2267 | |
2268 | v9fs_string_init(&name); |
2269 | err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dds", &dfid, &oldfid, &name); |
2270 | if (err < 0) { |
2271 | goto out_nofid; |
2272 | } |
2273 | trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); |
2274 | |
2275 | dfidp = get_fid(pdu, dfid); |
2276 | if (dfidp == NULL((void*)0)) { |
2277 | err = -ENOENT2; |
2278 | goto out_nofid; |
2279 | } |
2280 | |
2281 | oldfidp = get_fid(pdu, oldfid); |
2282 | if (oldfidp == NULL((void*)0)) { |
2283 | err = -ENOENT2; |
2284 | goto out; |
2285 | } |
2286 | err = v9fs_co_link(pdu, oldfidp, dfidp, &name); |
2287 | if (!err) { |
2288 | err = offset; |
2289 | } |
2290 | out: |
2291 | put_fid(pdu, dfidp); |
2292 | out_nofid: |
2293 | v9fs_string_free(&name); |
2294 | complete_pdu(s, pdu, err); |
2295 | } |
2296 | |
2297 | /* Only works with path name based fid */ |
2298 | static void v9fs_remove(void *opaque) |
2299 | { |
2300 | int32_t fid; |
2301 | int err = 0; |
2302 | size_t offset = 7; |
2303 | V9fsFidState *fidp; |
2304 | V9fsPDU *pdu = opaque; |
2305 | |
2306 | err = pdu_unmarshal(pdu, offset, "d", &fid)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "d", &fid); |
2307 | if (err < 0) { |
2308 | goto out_nofid; |
2309 | } |
2310 | trace_v9fs_remove(pdu->tag, pdu->id, fid); |
2311 | |
2312 | fidp = get_fid(pdu, fid); |
2313 | if (fidp == NULL((void*)0)) { |
2314 | err = -EINVAL22; |
2315 | goto out_nofid; |
2316 | } |
2317 | /* if fs driver is not path based, return EOPNOTSUPP */ |
2318 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT0x00000002)) { |
2319 | err = -EOPNOTSUPP95; |
2320 | goto out_err; |
2321 | } |
2322 | /* |
2323 | * IF the file is unlinked, we cannot reopen |
2324 | * the file later. So don't reclaim fd |
2325 | */ |
2326 | err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); |
2327 | if (err < 0) { |
2328 | goto out_err; |
2329 | } |
2330 | err = v9fs_co_remove(pdu, &fidp->path); |
2331 | if (!err) { |
2332 | err = offset; |
2333 | } |
2334 | out_err: |
2335 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
2336 | clunk_fid(pdu->s, fidp->fid); |
2337 | put_fid(pdu, fidp); |
2338 | out_nofid: |
2339 | complete_pdu(pdu->s, pdu, err); |
2340 | } |
2341 | |
2342 | static void v9fs_unlinkat(void *opaque) |
2343 | { |
2344 | int err = 0; |
2345 | V9fsString name; |
2346 | int32_t dfid, flags; |
2347 | size_t offset = 7; |
2348 | V9fsPath path; |
2349 | V9fsFidState *dfidp; |
2350 | V9fsPDU *pdu = opaque; |
2351 | |
2352 | v9fs_string_init(&name); |
2353 | err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsd", &dfid, &name, &flags); |
2354 | if (err < 0) { |
2355 | goto out_nofid; |
2356 | } |
2357 | dfidp = get_fid(pdu, dfid); |
2358 | if (dfidp == NULL((void*)0)) { |
2359 | err = -EINVAL22; |
2360 | goto out_nofid; |
2361 | } |
2362 | /* |
2363 | * IF the file is unlinked, we cannot reopen |
2364 | * the file later. So don't reclaim fd |
2365 | */ |
2366 | v9fs_path_init(&path); |
2367 | err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); |
2368 | if (err < 0) { |
2369 | goto out_err; |
2370 | } |
2371 | err = v9fs_mark_fids_unreclaim(pdu, &path); |
2372 | if (err < 0) { |
2373 | goto out_err; |
2374 | } |
2375 | err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags); |
2376 | if (!err) { |
2377 | err = offset; |
2378 | } |
2379 | out_err: |
2380 | put_fid(pdu, dfidp); |
2381 | v9fs_path_free(&path); |
2382 | out_nofid: |
2383 | complete_pdu(pdu->s, pdu, err); |
2384 | v9fs_string_free(&name); |
2385 | } |
2386 | |
2387 | |
2388 | /* Only works with path name based fid */ |
2389 | static int v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, |
2390 | int32_t newdirfid, V9fsString *name) |
2391 | { |
2392 | char *end; |
2393 | int err = 0; |
2394 | V9fsPath new_path; |
2395 | V9fsFidState *tfidp; |
2396 | V9fsState *s = pdu->s; |
2397 | V9fsFidState *dirfidp = NULL((void*)0); |
2398 | char *old_name, *new_name; |
2399 | |
2400 | v9fs_path_init(&new_path); |
2401 | if (newdirfid != -1) { |
2402 | dirfidp = get_fid(pdu, newdirfid); |
2403 | if (dirfidp == NULL((void*)0)) { |
2404 | err = -ENOENT2; |
2405 | goto out_nofid; |
2406 | } |
2407 | BUG_ON(dirfidp->fid_type != P9_FID_NONE)((!(dirfidp->fid_type != P9_FID_NONE)) ? (void) (0) : __assert_fail ("!(dirfidp->fid_type != P9_FID_NONE)", "/home/stefan/src/qemu/qemu.org/qemu/hw/9pfs/virtio-9p.c" , 2407, __PRETTY_FUNCTION__)); |
2408 | v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); |
2409 | } else { |
2410 | old_name = fidp->path.data; |
2411 | end = strrchr(old_name, '/'); |
2412 | if (end) { |
2413 | end++; |
2414 | } else { |
2415 | end = old_name; |
2416 | } |
2417 | new_name = g_malloc0(end - old_name + name->size + 1); |
2418 | strncat(new_name, old_name, end - old_name); |
2419 | strncat(new_name + (end - old_name), name->data, name->size); |
2420 | v9fs_co_name_to_path(pdu, NULL((void*)0), new_name, &new_path); |
2421 | g_free(new_name); |
2422 | } |
2423 | err = v9fs_co_rename(pdu, &fidp->path, &new_path); |
2424 | if (err < 0) { |
2425 | goto out; |
2426 | } |
2427 | /* |
2428 | * Fixup fid's pointing to the old name to |
2429 | * start pointing to the new name |
2430 | */ |
2431 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { |
2432 | if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { |
2433 | /* replace the name */ |
2434 | v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); |
2435 | } |
2436 | } |
2437 | out: |
2438 | if (dirfidp) { |
2439 | put_fid(pdu, dirfidp); |
2440 | } |
2441 | v9fs_path_free(&new_path); |
2442 | out_nofid: |
2443 | return err; |
2444 | } |
2445 | |
2446 | /* Only works with path name based fid */ |
2447 | static void v9fs_rename(void *opaque) |
2448 | { |
2449 | int32_t fid; |
2450 | ssize_t err = 0; |
2451 | size_t offset = 7; |
2452 | V9fsString name; |
2453 | int32_t newdirfid; |
2454 | V9fsFidState *fidp; |
2455 | V9fsPDU *pdu = opaque; |
2456 | V9fsState *s = pdu->s; |
2457 | |
2458 | v9fs_string_init(&name); |
2459 | err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dds", &fid, &newdirfid, &name); |
2460 | if (err < 0) { |
2461 | goto out_nofid; |
2462 | } |
2463 | fidp = get_fid(pdu, fid); |
2464 | if (fidp == NULL((void*)0)) { |
2465 | err = -ENOENT2; |
2466 | goto out_nofid; |
2467 | } |
2468 | BUG_ON(fidp->fid_type != P9_FID_NONE)((!(fidp->fid_type != P9_FID_NONE)) ? (void) (0) : __assert_fail ("!(fidp->fid_type != P9_FID_NONE)", "/home/stefan/src/qemu/qemu.org/qemu/hw/9pfs/virtio-9p.c" , 2468, __PRETTY_FUNCTION__)); |
2469 | /* if fs driver is not path based, return EOPNOTSUPP */ |
2470 | if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT0x00000002)) { |
2471 | err = -EOPNOTSUPP95; |
2472 | goto out; |
2473 | } |
2474 | v9fs_path_write_lock(s); |
2475 | err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); |
2476 | v9fs_path_unlock(s); |
2477 | if (!err) { |
2478 | err = offset; |
2479 | } |
2480 | out: |
2481 | put_fid(pdu, fidp); |
2482 | out_nofid: |
2483 | complete_pdu(s, pdu, err); |
2484 | v9fs_string_free(&name); |
2485 | } |
2486 | |
2487 | static void v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, |
2488 | V9fsString *old_name, V9fsPath *newdir, |
2489 | V9fsString *new_name) |
2490 | { |
2491 | V9fsFidState *tfidp; |
2492 | V9fsPath oldpath, newpath; |
2493 | V9fsState *s = pdu->s; |
2494 | |
2495 | |
2496 | v9fs_path_init(&oldpath); |
2497 | v9fs_path_init(&newpath); |
2498 | v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); |
2499 | v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); |
2500 | |
2501 | /* |
2502 | * Fixup fid's pointing to the old name to |
2503 | * start pointing to the new name |
2504 | */ |
2505 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { |
2506 | if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { |
2507 | /* replace the name */ |
2508 | v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); |
2509 | } |
2510 | } |
2511 | v9fs_path_free(&oldpath); |
2512 | v9fs_path_free(&newpath); |
2513 | } |
2514 | |
2515 | static int v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, |
2516 | V9fsString *old_name, int32_t newdirfid, |
2517 | V9fsString *new_name) |
2518 | { |
2519 | int err = 0; |
2520 | V9fsState *s = pdu->s; |
2521 | V9fsFidState *newdirfidp = NULL((void*)0), *olddirfidp = NULL((void*)0); |
2522 | |
2523 | olddirfidp = get_fid(pdu, olddirfid); |
2524 | if (olddirfidp == NULL((void*)0)) { |
2525 | err = -ENOENT2; |
2526 | goto out; |
2527 | } |
2528 | if (newdirfid != -1) { |
2529 | newdirfidp = get_fid(pdu, newdirfid); |
2530 | if (newdirfidp == NULL((void*)0)) { |
2531 | err = -ENOENT2; |
2532 | goto out; |
2533 | } |
2534 | } else { |
2535 | newdirfidp = get_fid(pdu, olddirfid); |
2536 | } |
2537 | |
2538 | err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, |
2539 | &newdirfidp->path, new_name); |
2540 | if (err < 0) { |
2541 | goto out; |
2542 | } |
2543 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT0x00000002) { |
2544 | /* Only for path based fid we need to do the below fixup */ |
2545 | v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, |
2546 | &newdirfidp->path, new_name); |
2547 | } |
2548 | out: |
2549 | if (olddirfidp) { |
2550 | put_fid(pdu, olddirfidp); |
2551 | } |
2552 | if (newdirfidp) { |
2553 | put_fid(pdu, newdirfidp); |
2554 | } |
2555 | return err; |
2556 | } |
2557 | |
2558 | static void v9fs_renameat(void *opaque) |
2559 | { |
2560 | ssize_t err = 0; |
2561 | size_t offset = 7; |
2562 | V9fsPDU *pdu = opaque; |
2563 | V9fsState *s = pdu->s; |
2564 | int32_t olddirfid, newdirfid; |
2565 | V9fsString old_name, new_name; |
2566 | |
2567 | v9fs_string_init(&old_name); |
2568 | v9fs_string_init(&new_name); |
2569 | err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsds", &olddirfid, &old_name, &newdirfid, & new_name) |
2570 | &old_name, &newdirfid, &new_name)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsds", &olddirfid, &old_name, &newdirfid, & new_name); |
2571 | if (err < 0) { |
2572 | goto out_err; |
2573 | } |
2574 | |
2575 | v9fs_path_write_lock(s); |
2576 | err = v9fs_complete_renameat(pdu, olddirfid, |
2577 | &old_name, newdirfid, &new_name); |
2578 | v9fs_path_unlock(s); |
2579 | if (!err) { |
2580 | err = offset; |
2581 | } |
2582 | |
2583 | out_err: |
2584 | complete_pdu(s, pdu, err); |
2585 | v9fs_string_free(&old_name); |
2586 | v9fs_string_free(&new_name); |
2587 | } |
2588 | |
2589 | static void v9fs_wstat(void *opaque) |
2590 | { |
2591 | int32_t fid; |
2592 | int err = 0; |
2593 | int16_t unused; |
2594 | V9fsStat v9stat; |
2595 | size_t offset = 7; |
2596 | struct stat stbuf; |
2597 | V9fsFidState *fidp; |
2598 | V9fsPDU *pdu = opaque; |
2599 | V9fsState *s = pdu->s; |
2600 | |
2601 | v9fs_stat_init(&v9stat); |
2602 | err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dwS", &fid, &unused, &v9stat); |
2603 | if (err < 0) { |
2604 | goto out_nofid; |
2605 | } |
2606 | trace_v9fs_wstat(pdu->tag, pdu->id, fid, |
2607 | v9stat.mode, v9stat.atime, v9stat.mtime); |
2608 | |
2609 | fidp = get_fid(pdu, fid); |
2610 | if (fidp == NULL((void*)0)) { |
2611 | err = -EINVAL22; |
2612 | goto out_nofid; |
2613 | } |
2614 | /* do we need to sync the file? */ |
2615 | if (donttouch_stat(&v9stat)) { |
2616 | err = v9fs_co_fsync(pdu, fidp, 0); |
2617 | goto out; |
2618 | } |
2619 | if (v9stat.mode != -1) { |
2620 | uint32_t v9_mode; |
2621 | err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
2622 | if (err < 0) { |
2623 | goto out; |
2624 | } |
2625 | v9_mode = stat_to_v9mode(&stbuf); |
2626 | if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS(0x80000000 | 0x02000000 | 0x01000000 | 0x00800000 | 0x00200000 | 0x00100000)) != |
2627 | (v9_mode & P9_STAT_MODE_TYPE_BITS(0x80000000 | 0x02000000 | 0x01000000 | 0x00800000 | 0x00200000 | 0x00100000))) { |
2628 | /* Attempting to change the type */ |
2629 | err = -EIO5; |
2630 | goto out; |
2631 | } |
2632 | err = v9fs_co_chmod(pdu, &fidp->path, |
2633 | v9mode_to_mode(v9stat.mode, |
2634 | &v9stat.extension)); |
2635 | if (err < 0) { |
2636 | goto out; |
2637 | } |
2638 | } |
2639 | if (v9stat.mtime != -1 || v9stat.atime != -1) { |
2640 | struct timespec times[2]; |
2641 | if (v9stat.atime != -1) { |
2642 | times[0].tv_sec = v9stat.atime; |
2643 | times[0].tv_nsec = 0; |
2644 | } else { |
2645 | times[0].tv_nsec = UTIME_OMIT((1l << 30) - 2l); |
2646 | } |
2647 | if (v9stat.mtime != -1) { |
2648 | times[1].tv_sec = v9stat.mtime; |
2649 | times[1].tv_nsec = 0; |
2650 | } else { |
2651 | times[1].tv_nsec = UTIME_OMIT((1l << 30) - 2l); |
2652 | } |
2653 | err = v9fs_co_utimensat(pdu, &fidp->path, times); |
2654 | if (err < 0) { |
2655 | goto out; |
2656 | } |
2657 | } |
2658 | if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { |
2659 | err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); |
2660 | if (err < 0) { |
2661 | goto out; |
2662 | } |
2663 | } |
2664 | if (v9stat.name.size != 0) { |
2665 | err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); |
2666 | if (err < 0) { |
2667 | goto out; |
2668 | } |
2669 | } |
2670 | if (v9stat.length != -1) { |
2671 | err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); |
2672 | if (err < 0) { |
2673 | goto out; |
2674 | } |
2675 | } |
2676 | err = offset; |
2677 | out: |
2678 | put_fid(pdu, fidp); |
2679 | out_nofid: |
2680 | v9fs_stat_free(&v9stat); |
2681 | complete_pdu(s, pdu, err); |
2682 | } |
2683 | |
2684 | static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
2685 | { |
2686 | uint32_t f_type; |
2687 | uint32_t f_bsize; |
2688 | uint64_t f_blocks; |
2689 | uint64_t f_bfree; |
2690 | uint64_t f_bavail; |
2691 | uint64_t f_files; |
2692 | uint64_t f_ffree; |
2693 | uint64_t fsid_val; |
2694 | uint32_t f_namelen; |
2695 | size_t offset = 7; |
2696 | int32_t bsize_factor; |
2697 | |
2698 | /* |
2699 | * compute bsize factor based on host file system block size |
2700 | * and client msize |
2701 | */ |
2702 | bsize_factor = (s->msize - P9_IOHDRSZ24)/stbuf->f_bsize; |
2703 | if (!bsize_factor) { |
2704 | bsize_factor = 1; |
2705 | } |
2706 | f_type = stbuf->f_type; |
2707 | f_bsize = stbuf->f_bsize; |
2708 | f_bsize *= bsize_factor; |
2709 | /* |
2710 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to |
2711 | * adjust(divide) the number of blocks, free blocks and available |
2712 | * blocks by bsize factor |
2713 | */ |
2714 | f_blocks = stbuf->f_blocks/bsize_factor; |
2715 | f_bfree = stbuf->f_bfree/bsize_factor; |
2716 | f_bavail = stbuf->f_bavail/bsize_factor; |
2717 | f_files = stbuf->f_files; |
2718 | f_ffree = stbuf->f_ffree; |
2719 | fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | |
2720 | (unsigned long long)stbuf->f_fsid.__val[1] << 32; |
2721 | f_namelen = stbuf->f_namelen; |
2722 | |
2723 | return pdu_marshal(pdu, offset, "ddqqqqqqd",v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "ddqqqqqqd", f_type, f_bsize, f_blocks, f_bfree, f_bavail , f_files, f_ffree, fsid_val, f_namelen) |
2724 | f_type, f_bsize, f_blocks, f_bfree,v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "ddqqqqqqd", f_type, f_bsize, f_blocks, f_bfree, f_bavail , f_files, f_ffree, fsid_val, f_namelen) |
2725 | f_bavail, f_files, f_ffree,v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "ddqqqqqqd", f_type, f_bsize, f_blocks, f_bfree, f_bavail , f_files, f_ffree, fsid_val, f_namelen) |
2726 | fsid_val, f_namelen)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "ddqqqqqqd", f_type, f_bsize, f_blocks, f_bfree, f_bavail , f_files, f_ffree, fsid_val, f_namelen); |
2727 | } |
2728 | |
2729 | static void v9fs_statfs(void *opaque) |
2730 | { |
2731 | int32_t fid; |
2732 | ssize_t retval = 0; |
2733 | size_t offset = 7; |
2734 | V9fsFidState *fidp; |
2735 | struct statfs stbuf; |
2736 | V9fsPDU *pdu = opaque; |
2737 | V9fsState *s = pdu->s; |
2738 | |
2739 | retval = pdu_unmarshal(pdu, offset, "d", &fid)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "d", &fid); |
2740 | if (retval < 0) { |
2741 | goto out_nofid; |
2742 | } |
2743 | fidp = get_fid(pdu, fid); |
2744 | if (fidp == NULL((void*)0)) { |
2745 | retval = -ENOENT2; |
2746 | goto out_nofid; |
2747 | } |
2748 | retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); |
2749 | if (retval < 0) { |
2750 | goto out; |
2751 | } |
2752 | retval = v9fs_fill_statfs(s, pdu, &stbuf); |
2753 | if (retval < 0) { |
2754 | goto out; |
2755 | } |
2756 | retval += offset; |
2757 | out: |
2758 | put_fid(pdu, fidp); |
2759 | out_nofid: |
2760 | complete_pdu(s, pdu, retval); |
2761 | return; |
2762 | } |
2763 | |
2764 | static void v9fs_mknod(void *opaque) |
2765 | { |
2766 | |
2767 | int mode; |
2768 | gid_t gid; |
2769 | int32_t fid; |
2770 | V9fsQID qid; |
2771 | int err = 0; |
2772 | int major, minor; |
2773 | size_t offset = 7; |
2774 | V9fsString name; |
2775 | struct stat stbuf; |
2776 | V9fsFidState *fidp; |
2777 | V9fsPDU *pdu = opaque; |
2778 | V9fsState *s = pdu->s; |
2779 | |
2780 | v9fs_string_init(&name); |
2781 | err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsdddd", &fid, &name, &mode, &major, & minor, &gid) |
2782 | &major, &minor, &gid)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsdddd", &fid, &name, &mode, &major, & minor, &gid); |
2783 | if (err < 0) { |
2784 | goto out_nofid; |
2785 | } |
2786 | trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); |
2787 | |
2788 | fidp = get_fid(pdu, fid); |
2789 | if (fidp == NULL((void*)0)) { |
2790 | err = -ENOENT2; |
2791 | goto out_nofid; |
2792 | } |
2793 | err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, |
2794 | makedev(major, minor)gnu_dev_makedev (major, minor), mode, &stbuf); |
2795 | if (err < 0) { |
2796 | goto out; |
2797 | } |
2798 | stat_to_qid(&stbuf, &qid); |
2799 | err = pdu_marshal(pdu, offset, "Q", &qid)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "Q", &qid); |
2800 | if (err < 0) { |
2801 | goto out; |
2802 | } |
2803 | err += offset; |
2804 | trace_v9fs_mknod_return(pdu->tag, pdu->id, |
2805 | qid.type, qid.version, qid.path); |
2806 | out: |
2807 | put_fid(pdu, fidp); |
2808 | out_nofid: |
2809 | complete_pdu(s, pdu, err); |
2810 | v9fs_string_free(&name); |
2811 | } |
2812 | |
2813 | /* |
2814 | * Implement posix byte range locking code |
2815 | * Server side handling of locking code is very simple, because 9p server in |
2816 | * QEMU can handle only one client. And most of the lock handling |
2817 | * (like conflict, merging) etc is done by the VFS layer itself, so no need to |
2818 | * do any thing in * qemu 9p server side lock code path. |
2819 | * So when a TLOCK request comes, always return success |
2820 | */ |
2821 | static void v9fs_lock(void *opaque) |
2822 | { |
2823 | int8_t status; |
2824 | V9fsFlock flock; |
2825 | size_t offset = 7; |
2826 | struct stat stbuf; |
2827 | V9fsFidState *fidp; |
2828 | int32_t fid, err = 0; |
2829 | V9fsPDU *pdu = opaque; |
2830 | V9fsState *s = pdu->s; |
2831 | |
2832 | status = P9_LOCK_ERROR2; |
2833 | v9fs_string_init(&flock.client_id); |
2834 | err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dbdqqds", &fid, &flock.type, &flock.flags, & flock.start, &flock.length, &flock.proc_id, &flock .client_id) |
2835 | &flock.flags, &flock.start, &flock.length,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dbdqqds", &fid, &flock.type, &flock.flags, & flock.start, &flock.length, &flock.proc_id, &flock .client_id) |
2836 | &flock.proc_id, &flock.client_id)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dbdqqds", &fid, &flock.type, &flock.flags, & flock.start, &flock.length, &flock.proc_id, &flock .client_id); |
2837 | if (err < 0) { |
2838 | goto out_nofid; |
2839 | } |
2840 | trace_v9fs_lock(pdu->tag, pdu->id, fid, |
2841 | flock.type, flock.start, flock.length); |
2842 | |
2843 | |
2844 | /* We support only block flag now (that too ignored currently) */ |
2845 | if (flock.flags & ~P9_LOCK_FLAGS_BLOCK1) { |
2846 | err = -EINVAL22; |
2847 | goto out_nofid; |
2848 | } |
2849 | fidp = get_fid(pdu, fid); |
2850 | if (fidp == NULL((void*)0)) { |
2851 | err = -ENOENT2; |
2852 | goto out_nofid; |
2853 | } |
2854 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
2855 | if (err < 0) { |
2856 | goto out; |
2857 | } |
2858 | status = P9_LOCK_SUCCESS0; |
2859 | out: |
2860 | put_fid(pdu, fidp); |
2861 | out_nofid: |
2862 | err = pdu_marshal(pdu, offset, "b", status)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "b", status); |
2863 | if (err > 0) { |
2864 | err += offset; |
2865 | } |
2866 | trace_v9fs_lock_return(pdu->tag, pdu->id, status); |
2867 | complete_pdu(s, pdu, err); |
2868 | v9fs_string_free(&flock.client_id); |
2869 | } |
2870 | |
2871 | /* |
2872 | * When a TGETLOCK request comes, always return success because all lock |
2873 | * handling is done by client's VFS layer. |
2874 | */ |
2875 | static void v9fs_getlock(void *opaque) |
2876 | { |
2877 | size_t offset = 7; |
2878 | struct stat stbuf; |
2879 | V9fsFidState *fidp; |
2880 | V9fsGetlock glock; |
2881 | int32_t fid, err = 0; |
2882 | V9fsPDU *pdu = opaque; |
2883 | V9fsState *s = pdu->s; |
2884 | |
2885 | v9fs_string_init(&glock.client_id); |
2886 | err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dbqqds", &fid, &glock.type, &glock.start, & glock.length, &glock.proc_id, &glock.client_id) |
2887 | &glock.start, &glock.length, &glock.proc_id,v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dbqqds", &fid, &glock.type, &glock.start, & glock.length, &glock.proc_id, &glock.client_id) |
2888 | &glock.client_id)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dbqqds", &fid, &glock.type, &glock.start, & glock.length, &glock.proc_id, &glock.client_id); |
2889 | if (err < 0) { |
2890 | goto out_nofid; |
2891 | } |
2892 | trace_v9fs_getlock(pdu->tag, pdu->id, fid, |
2893 | glock.type, glock.start, glock.length); |
2894 | |
2895 | fidp = get_fid(pdu, fid); |
2896 | if (fidp == NULL((void*)0)) { |
2897 | err = -ENOENT2; |
2898 | goto out_nofid; |
2899 | } |
2900 | err = v9fs_co_fstat(pdu, fidp, &stbuf); |
2901 | if (err < 0) { |
2902 | goto out; |
2903 | } |
2904 | glock.type = P9_LOCK_TYPE_UNLCK2; |
2905 | err = pdu_marshal(pdu, offset, "bqqds", glock.type,v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "bqqds", glock.type, glock.start, glock.length, glock.proc_id , &glock.client_id) |
2906 | glock.start, glock.length, glock.proc_id,v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "bqqds", glock.type, glock.start, glock.length, glock.proc_id , &glock.client_id) |
2907 | &glock.client_id)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "bqqds", glock.type, glock.start, glock.length, glock.proc_id , &glock.client_id); |
2908 | if (err < 0) { |
2909 | goto out; |
2910 | } |
2911 | err += offset; |
2912 | trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, |
2913 | glock.length, glock.proc_id); |
2914 | out: |
2915 | put_fid(pdu, fidp); |
2916 | out_nofid: |
2917 | complete_pdu(s, pdu, err); |
2918 | v9fs_string_free(&glock.client_id); |
2919 | } |
2920 | |
2921 | static void v9fs_mkdir(void *opaque) |
2922 | { |
2923 | V9fsPDU *pdu = opaque; |
2924 | size_t offset = 7; |
2925 | int32_t fid; |
2926 | struct stat stbuf; |
2927 | V9fsQID qid; |
2928 | V9fsString name; |
2929 | V9fsFidState *fidp; |
2930 | gid_t gid; |
2931 | int mode; |
2932 | int err = 0; |
2933 | |
2934 | v9fs_string_init(&name); |
2935 | err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsdd", &fid, &name, &mode, &gid); |
2936 | if (err < 0) { |
2937 | goto out_nofid; |
2938 | } |
2939 | trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); |
2940 | |
2941 | fidp = get_fid(pdu, fid); |
2942 | if (fidp == NULL((void*)0)) { |
2943 | err = -ENOENT2; |
2944 | goto out_nofid; |
2945 | } |
2946 | err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); |
2947 | if (err < 0) { |
2948 | goto out; |
2949 | } |
2950 | stat_to_qid(&stbuf, &qid); |
2951 | err = pdu_marshal(pdu, offset, "Q", &qid)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "Q", &qid); |
2952 | if (err < 0) { |
2953 | goto out; |
2954 | } |
2955 | err += offset; |
2956 | trace_v9fs_mkdir_return(pdu->tag, pdu->id, |
2957 | qid.type, qid.version, qid.path, err); |
2958 | out: |
2959 | put_fid(pdu, fidp); |
2960 | out_nofid: |
2961 | complete_pdu(pdu->s, pdu, err); |
2962 | v9fs_string_free(&name); |
2963 | } |
2964 | |
2965 | static void v9fs_xattrwalk(void *opaque) |
2966 | { |
2967 | int64_t size; |
2968 | V9fsString name; |
2969 | ssize_t err = 0; |
2970 | size_t offset = 7; |
2971 | int32_t fid, newfid; |
2972 | V9fsFidState *file_fidp; |
2973 | V9fsFidState *xattr_fidp = NULL((void*)0); |
2974 | V9fsPDU *pdu = opaque; |
2975 | V9fsState *s = pdu->s; |
2976 | |
2977 | v9fs_string_init(&name); |
2978 | err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dds", &fid, &newfid, &name); |
2979 | if (err < 0) { |
2980 | goto out_nofid; |
2981 | } |
2982 | trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); |
2983 | |
2984 | file_fidp = get_fid(pdu, fid); |
2985 | if (file_fidp == NULL((void*)0)) { |
2986 | err = -ENOENT2; |
2987 | goto out_nofid; |
2988 | } |
2989 | xattr_fidp = alloc_fid(s, newfid); |
2990 | if (xattr_fidp == NULL((void*)0)) { |
2991 | err = -EINVAL22; |
2992 | goto out; |
2993 | } |
2994 | v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); |
2995 | if (name.data == NULL((void*)0)) { |
2996 | /* |
2997 | * listxattr request. Get the size first |
2998 | */ |
2999 | size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL((void*)0), 0); |
3000 | if (size < 0) { |
3001 | err = size; |
3002 | clunk_fid(s, xattr_fidp->fid); |
3003 | goto out; |
3004 | } |
3005 | /* |
3006 | * Read the xattr value |
3007 | */ |
3008 | xattr_fidp->fs.xattr.len = size; |
3009 | xattr_fidp->fid_type = P9_FID_XATTR; |
3010 | xattr_fidp->fs.xattr.copied_len = -1; |
3011 | if (size) { |
3012 | xattr_fidp->fs.xattr.value = g_malloc(size); |
3013 | err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, |
3014 | xattr_fidp->fs.xattr.value, |
3015 | xattr_fidp->fs.xattr.len); |
3016 | if (err < 0) { |
3017 | clunk_fid(s, xattr_fidp->fid); |
3018 | goto out; |
3019 | } |
3020 | } |
3021 | err = pdu_marshal(pdu, offset, "q", size)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "q", size); |
3022 | if (err < 0) { |
3023 | goto out; |
3024 | } |
3025 | err += offset; |
3026 | } else { |
3027 | /* |
3028 | * specific xattr fid. We check for xattr |
3029 | * presence also collect the xattr size |
3030 | */ |
3031 | size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
3032 | &name, NULL((void*)0), 0); |
3033 | if (size < 0) { |
3034 | err = size; |
3035 | clunk_fid(s, xattr_fidp->fid); |
3036 | goto out; |
3037 | } |
3038 | /* |
3039 | * Read the xattr value |
3040 | */ |
3041 | xattr_fidp->fs.xattr.len = size; |
3042 | xattr_fidp->fid_type = P9_FID_XATTR; |
3043 | xattr_fidp->fs.xattr.copied_len = -1; |
3044 | if (size) { |
3045 | xattr_fidp->fs.xattr.value = g_malloc(size); |
3046 | err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
3047 | &name, xattr_fidp->fs.xattr.value, |
3048 | xattr_fidp->fs.xattr.len); |
3049 | if (err < 0) { |
3050 | clunk_fid(s, xattr_fidp->fid); |
3051 | goto out; |
3052 | } |
3053 | } |
3054 | err = pdu_marshal(pdu, offset, "q", size)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "q", size); |
3055 | if (err < 0) { |
3056 | goto out; |
3057 | } |
3058 | err += offset; |
3059 | } |
3060 | trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); |
3061 | out: |
3062 | put_fid(pdu, file_fidp); |
3063 | if (xattr_fidp) { |
3064 | put_fid(pdu, xattr_fidp); |
3065 | } |
3066 | out_nofid: |
3067 | complete_pdu(s, pdu, err); |
3068 | v9fs_string_free(&name); |
3069 | } |
3070 | |
3071 | static void v9fs_xattrcreate(void *opaque) |
3072 | { |
3073 | int flags; |
3074 | int32_t fid; |
3075 | int64_t size; |
3076 | ssize_t err = 0; |
3077 | V9fsString name; |
3078 | size_t offset = 7; |
3079 | V9fsFidState *file_fidp; |
3080 | V9fsFidState *xattr_fidp; |
3081 | V9fsPDU *pdu = opaque; |
3082 | V9fsState *s = pdu->s; |
3083 | |
3084 | v9fs_string_init(&name); |
3085 | err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "dsqd", &fid, &name, &size, &flags); |
3086 | if (err < 0) { |
3087 | goto out_nofid; |
3088 | } |
3089 | trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); |
3090 | |
3091 | file_fidp = get_fid(pdu, fid); |
3092 | if (file_fidp == NULL((void*)0)) { |
3093 | err = -EINVAL22; |
3094 | goto out_nofid; |
3095 | } |
3096 | /* Make the file fid point to xattr */ |
3097 | xattr_fidp = file_fidp; |
3098 | xattr_fidp->fid_type = P9_FID_XATTR; |
3099 | xattr_fidp->fs.xattr.copied_len = 0; |
3100 | xattr_fidp->fs.xattr.len = size; |
3101 | xattr_fidp->fs.xattr.flags = flags; |
3102 | v9fs_string_init(&xattr_fidp->fs.xattr.name); |
3103 | v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); |
3104 | if (size) { |
3105 | xattr_fidp->fs.xattr.value = g_malloc(size); |
3106 | } else { |
3107 | xattr_fidp->fs.xattr.value = NULL((void*)0); |
3108 | } |
3109 | err = offset; |
3110 | put_fid(pdu, file_fidp); |
3111 | out_nofid: |
3112 | complete_pdu(s, pdu, err); |
3113 | v9fs_string_free(&name); |
3114 | } |
3115 | |
3116 | static void v9fs_readlink(void *opaque) |
3117 | { |
3118 | V9fsPDU *pdu = opaque; |
3119 | size_t offset = 7; |
3120 | V9fsString target; |
3121 | int32_t fid; |
3122 | int err = 0; |
3123 | V9fsFidState *fidp; |
3124 | |
3125 | err = pdu_unmarshal(pdu, offset, "d", &fid)v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset , 1, "d", &fid); |
3126 | if (err < 0) { |
3127 | goto out_nofid; |
3128 | } |
3129 | trace_v9fs_readlink(pdu->tag, pdu->id, fid); |
3130 | fidp = get_fid(pdu, fid); |
3131 | if (fidp == NULL((void*)0)) { |
3132 | err = -ENOENT2; |
3133 | goto out_nofid; |
3134 | } |
3135 | |
3136 | v9fs_string_init(&target); |
3137 | err = v9fs_co_readlink(pdu, &fidp->path, &target); |
3138 | if (err < 0) { |
3139 | goto out; |
3140 | } |
3141 | err = pdu_marshal(pdu, offset, "s", &target)v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, "s", &target); |
3142 | if (err < 0) { |
3143 | v9fs_string_free(&target); |
3144 | goto out; |
3145 | } |
3146 | err += offset; |
3147 | trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); |
3148 | v9fs_string_free(&target); |
3149 | out: |
3150 | put_fid(pdu, fidp); |
3151 | out_nofid: |
3152 | complete_pdu(pdu->s, pdu, err); |
3153 | } |
3154 | |
3155 | static CoroutineEntry *pdu_co_handlers[] = { |
3156 | [P9_TREADDIR] = v9fs_readdir, |
3157 | [P9_TSTATFS] = v9fs_statfs, |
3158 | [P9_TGETATTR] = v9fs_getattr, |
3159 | [P9_TSETATTR] = v9fs_setattr, |
3160 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
3161 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
3162 | [P9_TMKNOD] = v9fs_mknod, |
3163 | [P9_TRENAME] = v9fs_rename, |
3164 | [P9_TLOCK] = v9fs_lock, |
3165 | [P9_TGETLOCK] = v9fs_getlock, |
3166 | [P9_TRENAMEAT] = v9fs_renameat, |
3167 | [P9_TREADLINK] = v9fs_readlink, |
3168 | [P9_TUNLINKAT] = v9fs_unlinkat, |
3169 | [P9_TMKDIR] = v9fs_mkdir, |
3170 | [P9_TVERSION] = v9fs_version, |
3171 | [P9_TLOPEN] = v9fs_open, |
3172 | [P9_TATTACH] = v9fs_attach, |
3173 | [P9_TSTAT] = v9fs_stat, |
3174 | [P9_TWALK] = v9fs_walk, |
3175 | [P9_TCLUNK] = v9fs_clunk, |
3176 | [P9_TFSYNC] = v9fs_fsync, |
3177 | [P9_TOPEN] = v9fs_open, |
3178 | [P9_TREAD] = v9fs_read, |
3179 | #if 0 |
3180 | [P9_TAUTH] = v9fs_auth, |
3181 | #endif |
3182 | [P9_TFLUSH] = v9fs_flush, |
3183 | [P9_TLINK] = v9fs_link, |
3184 | [P9_TSYMLINK] = v9fs_symlink, |
3185 | [P9_TCREATE] = v9fs_create, |
3186 | [P9_TLCREATE] = v9fs_lcreate, |
3187 | [P9_TWRITE] = v9fs_write, |
3188 | [P9_TWSTAT] = v9fs_wstat, |
3189 | [P9_TREMOVE] = v9fs_remove, |
3190 | }; |
3191 | |
3192 | static void v9fs_op_not_supp(void *opaque) |
3193 | { |
3194 | V9fsPDU *pdu = opaque; |
3195 | complete_pdu(pdu->s, pdu, -EOPNOTSUPP95); |
3196 | } |
3197 | |
3198 | static void v9fs_fs_ro(void *opaque) |
3199 | { |
3200 | V9fsPDU *pdu = opaque; |
3201 | complete_pdu(pdu->s, pdu, -EROFS30); |
3202 | } |
3203 | |
3204 | static inline bool_Bool is_read_only_op(V9fsPDU *pdu) |
3205 | { |
3206 | switch (pdu->id) { |
3207 | case P9_TREADDIR: |
3208 | case P9_TSTATFS: |
3209 | case P9_TGETATTR: |
3210 | case P9_TXATTRWALK: |
3211 | case P9_TLOCK: |
3212 | case P9_TGETLOCK: |
3213 | case P9_TREADLINK: |
3214 | case P9_TVERSION: |
3215 | case P9_TLOPEN: |
3216 | case P9_TATTACH: |
3217 | case P9_TSTAT: |
3218 | case P9_TWALK: |
3219 | case P9_TCLUNK: |
3220 | case P9_TFSYNC: |
3221 | case P9_TOPEN: |
3222 | case P9_TREAD: |
3223 | case P9_TAUTH: |
3224 | case P9_TFLUSH: |
3225 | return 1; |
3226 | default: |
3227 | return 0; |
3228 | } |
3229 | } |
3230 | |
3231 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3232 | { |
3233 | Coroutine *co; |
3234 | CoroutineEntry *handler; |
3235 | |
3236 | if (pdu->id >= ARRAY_SIZE(pdu_co_handlers)(sizeof(pdu_co_handlers) / sizeof((pdu_co_handlers)[0])) || |
3237 | (pdu_co_handlers[pdu->id] == NULL((void*)0))) { |
3238 | handler = v9fs_op_not_supp; |
3239 | } else { |
3240 | handler = pdu_co_handlers[pdu->id]; |
3241 | } |
3242 | |
3243 | if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { |
3244 | handler = v9fs_fs_ro; |
3245 | } |
3246 | co = qemu_coroutine_create(handler); |
3247 | qemu_coroutine_enter(co, pdu); |
3248 | } |
3249 | |
3250 | void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
3251 | { |
3252 | V9fsState *s = (V9fsState *)vdev; |
3253 | V9fsPDU *pdu; |
3254 | ssize_t len; |
3255 | |
3256 | while ((pdu = alloc_pdu(s)) && |
3257 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { |
Although the value stored to 'len' is used in the enclosing expression, the value is never actually read from 'len' | |
3258 | uint8_t *ptr; |
3259 | pdu->s = s; |
3260 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0)((!(pdu->elem.out_num == 0 || pdu->elem.in_num == 0)) ? (void) (0) : __assert_fail ("!(pdu->elem.out_num == 0 || pdu->elem.in_num == 0)" , "/home/stefan/src/qemu/qemu.org/qemu/hw/9pfs/virtio-9p.c", 3260 , __PRETTY_FUNCTION__)); |
3261 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7)((!(pdu->elem.out_sg[0].iov_len < 7)) ? (void) (0) : __assert_fail ("!(pdu->elem.out_sg[0].iov_len < 7)", "/home/stefan/src/qemu/qemu.org/qemu/hw/9pfs/virtio-9p.c" , 3261, __PRETTY_FUNCTION__)); |
3262 | |
3263 | ptr = pdu->elem.out_sg[0].iov_base; |
3264 | |
3265 | pdu->size = le32_to_cpu(*(uint32_t *)ptr); |
3266 | pdu->id = ptr[4]; |
3267 | pdu->tag = le16_to_cpu(*(uint16_t *)(ptr + 5)); |
3268 | qemu_co_queue_init(&pdu->complete); |
3269 | submit_pdu(s, pdu); |
3270 | } |
3271 | free_pdu(s, pdu); |
3272 | } |
3273 | |
3274 | void virtio_9p_set_fd_limit(void) |
3275 | { |
3276 | struct rlimit rlim; |
3277 | if (getrlimit(RLIMIT_NOFILERLIMIT_NOFILE, &rlim) < 0) { |
3278 | fprintf(stderrstderr, "Failed to get the resource limit\n"); |
3279 | exit(1); |
3280 | } |
3281 | open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3)(((400) < (rlim.rlim_cur/3)) ? (400) : (rlim.rlim_cur/3)); |
3282 | open_fd_rc = rlim.rlim_cur/2; |
3283 | } |