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[virtio-9p] Qemu 9p commandline options validity checks
[qemu.git] / hw / virtio-9p.c
CommitLineData
9f107513
AL		 1/*
2 * Virtio 9p backend
3 *
4 * Copyright IBM, Corp. 2010
5 *
6 * Authors:
7 * Anthony Liguori <[email protected]>
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 "virtio.h"
15#include "pc.h"
16#include "qemu_socket.h"
17#include "virtio-9p.h"
18#include "fsdev/qemu-fsdev.h"
19#include "virtio-9p-debug.h"
fc22118d 20#include "virtio-9p-xattr.h"
9f107513 21
9f107513
AL		 22int debug_9p_pdu;
23
fac4f111
VJ		 24enum {
25 Oread = 0x00,
26 Owrite = 0x01,
27 Ordwr = 0x02,
28 Oexec = 0x03,
29 Oexcl = 0x04,
30 Otrunc = 0x10,
31 Orexec = 0x20,
32 Orclose = 0x40,
33 Oappend = 0x80,
34};
35
36static int omode_to_uflags(int8_t mode)
37{
38 int ret = 0;
39
40 switch (mode & 3) {
41 case Oread:
42 ret = O_RDONLY;
43 break;
44 case Ordwr:
45 ret = O_RDWR;
46 break;
47 case Owrite:
48 ret = O_WRONLY;
49 break;
50 case Oexec:
51 ret = O_RDONLY;
52 break;
53 }
54
55 if (mode & Otrunc) {
56 ret |= O_TRUNC;
57 }
58
59 if (mode & Oappend) {
60 ret |= O_APPEND;
61 }
62
63 if (mode & Oexcl) {
64 ret |= O_EXCL;
65 }
66
67 return ret;
68}
69
758e8e38 70void cred_init(FsCred *credp)
131dcb25 71{
758e8e38
VJ		 72 credp->fc_uid = -1;
73 credp->fc_gid = -1;
74 credp->fc_mode = -1;
75 credp->fc_rdev = -1;
131dcb25
AL		 76}
77
758e8e38 78static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf)
131dcb25 79{
758e8e38 80 return s->ops->lstat(&s->ctx, path->data, stbuf);
131dcb25
AL		 81}
82
83static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
84{
85 ssize_t len;
86
87 buf->data = qemu_malloc(1024);
88
89 len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1);
90 if (len > -1) {
91 buf->size = len;
92 buf->data[len] = 0;
93 }
94
95 return len;
96}
97
98static int v9fs_do_close(V9fsState *s, int fd)
99{
100 return s->ops->close(&s->ctx, fd);
101}
102
103static int v9fs_do_closedir(V9fsState *s, DIR *dir)
104{
105 return s->ops->closedir(&s->ctx, dir);
106}
107
a6568fe2
AL		 108static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags)
109{
110 return s->ops->open(&s->ctx, path->data, flags);
111}
112
113static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path)
114{
115 return s->ops->opendir(&s->ctx, path->data);
116}
117
a9231555
AL		 118static void v9fs_do_rewinddir(V9fsState *s, DIR *dir)
119{
120 return s->ops->rewinddir(&s->ctx, dir);
121}
122
123static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
124{
125 return s->ops->telldir(&s->ctx, dir);
126}
127
128static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir)
129{
130 return s->ops->readdir(&s->ctx, dir);
131}
132
133static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off)
134{
135 return s->ops->seekdir(&s->ctx, dir, off);
136}
137
138static int v9fs_do_readv(V9fsState *s, int fd, const struct iovec *iov,
139 int iovcnt)
140{
141 return s->ops->readv(&s->ctx, fd, iov, iovcnt);
142}
143
144static off_t v9fs_do_lseek(V9fsState *s, int fd, off_t offset, int whence)
145{
146 return s->ops->lseek(&s->ctx, fd, offset, whence);
147}
148
8449360c
AL		 149static int v9fs_do_writev(V9fsState *s, int fd, const struct iovec *iov,
150 int iovcnt)
151{
152 return s->ops->writev(&s->ctx, fd, iov, iovcnt);
153}
154
c494dd6f
AL		 155static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
156{
e95ead32
VJ		 157 FsCred cred;
158 cred_init(&cred);
159 cred.fc_mode = mode;
160 return s->ops->chmod(&s->ctx, path->data, &cred);
c494dd6f
AL		 161}
162
5268cecc
MK		 163static int v9fs_do_mknod(V9fsState *s, char *name,
164 mode_t mode, dev_t dev, uid_t uid, gid_t gid)
c494dd6f 165{
1c293312
VJ		 166 FsCred cred;
167 cred_init(&cred);
5268cecc
MK		 168 cred.fc_uid = uid;
169 cred.fc_gid = gid;
1c293312
VJ		 170 cred.fc_mode = mode;
171 cred.fc_rdev = dev;
5268cecc 172 return s->ops->mknod(&s->ctx, name, &cred);
c494dd6f
AL		 173}
174
b67592ea
MK		 175static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode,
176 uid_t uid, gid_t gid)
c494dd6f 177{
00ec5c37
VJ		 178 FsCred cred;
179
180 cred_init(&cred);
b67592ea
MK		 181 cred.fc_uid = uid;
182 cred.fc_gid = gid;
183 cred.fc_mode = mode;
00ec5c37 184
b67592ea 185 return s->ops->mkdir(&s->ctx, name, &cred);
c494dd6f
AL		 186}
187
188static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf)
189{
190 return s->ops->fstat(&s->ctx, fd, stbuf);
191}
192
c1568af5
VJ		 193static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid,
194 int flags, int mode)
c494dd6f 195{
4750a96f 196 FsCred cred;
4750a96f
VJ		 197
198 cred_init(&cred);
c1568af5
VJ		 199 cred.fc_uid = uid;
200 cred.fc_gid = gid;
201 cred.fc_mode = mode & 07777;
202 flags = flags;
4750a96f 203
c1568af5 204 return s->ops->open2(&s->ctx, fullname, flags, &cred);
c494dd6f
AL		 205}
206
08c60fc9
VJ		 207static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp,
208 const char *oldpath, const char *newpath, gid_t gid)
c494dd6f 209{
879c2813
VJ		 210 FsCred cred;
211 cred_init(&cred);
08c60fc9
VJ		 212 cred.fc_uid = fidp->uid;
213 cred.fc_gid = gid;
214 cred.fc_mode = 0777;
879c2813 215
08c60fc9 216 return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
c494dd6f
AL		 217}
218
219static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
220{
221 return s->ops->link(&s->ctx, oldpath->data, newpath->data);
222}
223
8cf89e00
AL		 224static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size)
225{
226 return s->ops->truncate(&s->ctx, path->data, size);
227}
228
229static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath,
230 V9fsString *newpath)
231{
232 return s->ops->rename(&s->ctx, oldpath->data, newpath->data);
233}
234
235static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid)
236{
f7613bee
VJ		 237 FsCred cred;
238 cred_init(&cred);
239 cred.fc_uid = uid;
240 cred.fc_gid = gid;
241
242 return s->ops->chown(&s->ctx, path->data, &cred);
8cf89e00
AL		 243}
244
8fc39ae4
SK		 245static int v9fs_do_utimensat(V9fsState *s, V9fsString *path,
246 const struct timespec times[2])
8cf89e00 247{
8fc39ae4 248 return s->ops->utimensat(&s->ctx, path->data, times);
8cf89e00
AL		 249}
250
5bae1900
AL		 251static int v9fs_do_remove(V9fsState *s, V9fsString *path)
252{
253 return s->ops->remove(&s->ctx, path->data);
254}
255
8cf89e00
AL		 256static int v9fs_do_fsync(V9fsState *s, int fd)
257{
258 return s->ops->fsync(&s->ctx, fd);
259}
260
5e94c103
MK		 261static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf)
262{
263 return s->ops->statfs(&s->ctx, path->data, stbuf);
264}
265
fa32ef88
AK		 266static ssize_t v9fs_do_lgetxattr(V9fsState *s, V9fsString *path,
267 V9fsString *xattr_name,
268 void *value, size_t size)
269{
270 return s->ops->lgetxattr(&s->ctx, path->data,
271 xattr_name->data, value, size);
272}
273
274static ssize_t v9fs_do_llistxattr(V9fsState *s, V9fsString *path,
275 void *value, size_t size)
276{
277 return s->ops->llistxattr(&s->ctx, path->data,
278 value, size);
279}
280
10b468bd
AK		 281static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path,
282 V9fsString *xattr_name,
283 void *value, size_t size, int flags)
284{
285 return s->ops->lsetxattr(&s->ctx, path->data,
286 xattr_name->data, value, size, flags);
287}
288
9ed3ef26
AK		 289static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path,
290 V9fsString *xattr_name)
291{
292 return s->ops->lremovexattr(&s->ctx, path->data,
293 xattr_name->data);
294}
295
296
a03f7874
AL		 297static void v9fs_string_init(V9fsString *str)
298{
299 str->data = NULL;
300 str->size = 0;
301}
302
303static void v9fs_string_free(V9fsString *str)
304{
305 qemu_free(str->data);
306 str->data = NULL;
307 str->size = 0;
308}
309
310static void v9fs_string_null(V9fsString *str)
311{
312 v9fs_string_free(str);
313}
314
315static int number_to_string(void *arg, char type)
316{
317 unsigned int ret = 0;
318
319 switch (type) {
320 case 'u': {
321 unsigned int num = *(unsigned int *)arg;
322
323 do {
324 ret++;
325 num = num/10;
326 } while (num);
327 break;
328 }
329 default:
330 printf("Number_to_string: Unknown number format\n");
331 return -1;
332 }
333
334 return ret;
335}
336
c9ba47dc
SW		 337static int GCC_FMT_ATTR(2, 0)
338v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap)
a03f7874
AL		 339{
340 va_list ap2;
341 char *iter = (char *)fmt;
342 int len = 0;
343 int nr_args = 0;
344 char *arg_char_ptr;
345 unsigned int arg_uint;
346
347 /* Find the number of %'s that denotes an argument */
348 for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {
349 nr_args++;
350 iter++;
351 }
352
353 len = strlen(fmt) - 2*nr_args;
354
355 if (!nr_args) {
356 goto alloc_print;
357 }
358
359 va_copy(ap2, ap);
360
361 iter = (char *)fmt;
362
363 /* Now parse the format string */
364 for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {
365 iter++;
366 switch (*iter) {
367 case 'u':
368 arg_uint = va_arg(ap2, unsigned int);
369 len += number_to_string((void *)&arg_uint, 'u');
370 break;
371 case 's':
372 arg_char_ptr = va_arg(ap2, char *);
373 len += strlen(arg_char_ptr);
374 break;
375 case 'c':
376 len += 1;
377 break;
378 default:
379 fprintf(stderr,
380 "v9fs_string_alloc_printf:Incorrect format %c", *iter);
381 return -1;
382 }
383 iter++;
384 }
385
386alloc_print:
387 *strp = qemu_malloc((len + 1) * sizeof(**strp));
388
389 return vsprintf(*strp, fmt, ap);
390}
391
c9ba47dc
SW		 392static void GCC_FMT_ATTR(2, 3)
393v9fs_string_sprintf(V9fsString *str, const char *fmt, ...)
a03f7874
AL		 394{
395 va_list ap;
396 int err;
397
398 v9fs_string_free(str);
399
400 va_start(ap, fmt);
401 err = v9fs_string_alloc_printf(&str->data, fmt, ap);
402 BUG_ON(err == -1);
403 va_end(ap);
404
405 str->size = err;
406}
407
408static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs)
409{
410 v9fs_string_free(lhs);
411 v9fs_string_sprintf(lhs, "%s", rhs->data);
412}
413
414static size_t v9fs_string_size(V9fsString *str)
415{
416 return str->size;
417}
418
286d5652
AL		 419static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
420{
421 V9fsFidState *f;
422
423 for (f = s->fid_list; f; f = f->next) {
424 if (f->fid == fid) {
286d5652
AL		 425 return f;
426 }
427 }
428
429 return NULL;
430}
431
432static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
433{
434 V9fsFidState *f;
435
436 f = lookup_fid(s, fid);
437 if (f) {
438 return NULL;
439 }
440
441 f = qemu_mallocz(sizeof(V9fsFidState));
442
443 f->fid = fid;
d62dbb51 444 f->fid_type = P9_FID_NONE;
286d5652
AL		 445
446 f->next = s->fid_list;
447 s->fid_list = f;
448
449 return f;
450}
451
10b468bd
AK		 452static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp)
453{
454 int retval = 0;
455
456 if (fidp->fs.xattr.copied_len == -1) {
457 /* getxattr/listxattr fid */
458 goto free_value;
459 }
460 /*
461 * if this is fid for setxattr. clunk should
462 * result in setxattr localcall
463 */
464 if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
465 /* clunk after partial write */
466 retval = -EINVAL;
467 goto free_out;
468 }
9ed3ef26
AK		 469 if (fidp->fs.xattr.len) {
470 retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name,
471 fidp->fs.xattr.value,
472 fidp->fs.xattr.len,
473 fidp->fs.xattr.flags);
474 } else {
475 retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name);
476 }
10b468bd
AK		 477free_out:
478 v9fs_string_free(&fidp->fs.xattr.name);
479free_value:
480 if (fidp->fs.xattr.value) {
481 qemu_free(fidp->fs.xattr.value);
482 }
483 return retval;
484}
485
286d5652
AL		 486static int free_fid(V9fsState *s, int32_t fid)
487{
10b468bd 488 int retval = 0;
286d5652
AL		 489 V9fsFidState **fidpp, *fidp;
490
491 for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
492 if ((*fidpp)->fid == fid) {
493 break;
494 }
495 }
496
497 if (*fidpp == NULL) {
498 return -ENOENT;
499 }
500
501 fidp = *fidpp;
502 *fidpp = fidp->next;
503
d62dbb51
AK		 504 if (fidp->fid_type == P9_FID_FILE) {
505 v9fs_do_close(s, fidp->fs.fd);
506 } else if (fidp->fid_type == P9_FID_DIR) {
507 v9fs_do_closedir(s, fidp->fs.dir);
508 } else if (fidp->fid_type == P9_FID_XATTR) {
10b468bd 509 retval = v9fs_xattr_fid_clunk(s, fidp);
286d5652
AL		 510 }
511 v9fs_string_free(&fidp->path);
512 qemu_free(fidp);
513
10b468bd 514 return retval;
286d5652
AL		 515}
516
517#define P9_QID_TYPE_DIR 0x80
518#define P9_QID_TYPE_SYMLINK 0x02
519
520#define P9_STAT_MODE_DIR 0x80000000
521#define P9_STAT_MODE_APPEND 0x40000000
522#define P9_STAT_MODE_EXCL 0x20000000
523#define P9_STAT_MODE_MOUNT 0x10000000
524#define P9_STAT_MODE_AUTH 0x08000000
525#define P9_STAT_MODE_TMP 0x04000000
526#define P9_STAT_MODE_SYMLINK 0x02000000
527#define P9_STAT_MODE_LINK 0x01000000
528#define P9_STAT_MODE_DEVICE 0x00800000
529#define P9_STAT_MODE_NAMED_PIPE 0x00200000
530#define P9_STAT_MODE_SOCKET 0x00100000
531#define P9_STAT_MODE_SETUID 0x00080000
532#define P9_STAT_MODE_SETGID 0x00040000
533#define P9_STAT_MODE_SETVTX 0x00010000
534
535#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
536 P9_STAT_MODE_SYMLINK | \
537 P9_STAT_MODE_LINK | \
538 P9_STAT_MODE_DEVICE | \
539 P9_STAT_MODE_NAMED_PIPE | \
540 P9_STAT_MODE_SOCKET)
541
542/* This is the algorithm from ufs in spfs */
543static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp)
544{
545 size_t size;
546
547 size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path));
548 memcpy(&qidp->path, &stbuf->st_ino, size);
549 qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
550 qidp->type = 0;
551 if (S_ISDIR(stbuf->st_mode)) {
552 qidp->type |= P9_QID_TYPE_DIR;
553 }
554 if (S_ISLNK(stbuf->st_mode)) {
555 qidp->type |= P9_QID_TYPE_SYMLINK;
556 }
557}
558
559static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp)
560{
561 struct stat stbuf;
562 int err;
563
564 err = v9fs_do_lstat(s, &fidp->path, &stbuf);
565 if (err) {
566 return err;
567 }
568
569 stat_to_qid(&stbuf, qidp);
570 return 0;
571}
572
9f107513
AL		 573static V9fsPDU *alloc_pdu(V9fsState *s)
574{
575 V9fsPDU *pdu = NULL;
576
577 if (!QLIST_EMPTY(&s->free_list)) {
578 pdu = QLIST_FIRST(&s->free_list);
579 QLIST_REMOVE(pdu, next);
580 }
581 return pdu;
582}
583
584static void free_pdu(V9fsState *s, V9fsPDU *pdu)
585{
586 if (pdu) {
587 QLIST_INSERT_HEAD(&s->free_list, pdu, next);
588 }
589}
590
591size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
592 size_t offset, size_t size, int pack)
593{
594 int i = 0;
595 size_t copied = 0;
596
597 for (i = 0; size && i < sg_count; i++) {
598 size_t len;
599 if (offset >= sg[i].iov_len) {
600 /* skip this sg */
601 offset -= sg[i].iov_len;
602 continue;
603 } else {
604 len = MIN(sg[i].iov_len - offset, size);
605 if (pack) {
606 memcpy(sg[i].iov_base + offset, addr, len);
607 } else {
608 memcpy(addr, sg[i].iov_base + offset, len);
609 }
610 size -= len;
611 copied += len;
612 addr += len;
613 if (size) {
614 offset = 0;
615 continue;
616 }
617 }
618 }
619
620 return copied;
621}
622
405a549a
AL		 623static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size)
624{
625 return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
626 offset, size, 0);
627}
628
629static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src,
630 size_t size)
631{
632 return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num,
633 offset, size, 1);
634}
635
636static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg)
637{
638 size_t pos = 0;
639 int i, j;
640 struct iovec *src_sg;
641 unsigned int num;
642
643 if (rx) {
644 src_sg = pdu->elem.in_sg;
645 num = pdu->elem.in_num;
646 } else {
647 src_sg = pdu->elem.out_sg;
648 num = pdu->elem.out_num;
649 }
650
651 j = 0;
652 for (i = 0; i < num; i++) {
653 if (offset <= pos) {
654 sg[j].iov_base = src_sg[i].iov_base;
655 sg[j].iov_len = src_sg[i].iov_len;
656 j++;
657 } else if (offset < (src_sg[i].iov_len + pos)) {
658 sg[j].iov_base = src_sg[i].iov_base;
659 sg[j].iov_len = src_sg[i].iov_len;
660 sg[j].iov_base += (offset - pos);
661 sg[j].iov_len -= (offset - pos);
662 j++;
663 }
664 pos += src_sg[i].iov_len;
665 }
666
667 return j;
668}
669
670static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
671{
672 size_t old_offset = offset;
673 va_list ap;
674 int i;
675
676 va_start(ap, fmt);
677 for (i = 0; fmt[i]; i++) {
678 switch (fmt[i]) {
679 case 'b': {
680 uint8_t *valp = va_arg(ap, uint8_t *);
681 offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
682 break;
683 }
684 case 'w': {
685 uint16_t val, *valp;
686 valp = va_arg(ap, uint16_t *);
687 val = le16_to_cpupu(valp);
688 offset += pdu_unpack(&val, pdu, offset, sizeof(val));
689 *valp = val;
690 break;
691 }
692 case 'd': {
693 uint32_t val, *valp;
694 valp = va_arg(ap, uint32_t *);
695 val = le32_to_cpupu(valp);
696 offset += pdu_unpack(&val, pdu, offset, sizeof(val));
697 *valp = val;
698 break;
699 }
700 case 'q': {
701 uint64_t val, *valp;
702 valp = va_arg(ap, uint64_t *);
703 val = le64_to_cpup(valp);
704 offset += pdu_unpack(&val, pdu, offset, sizeof(val));
705 *valp = val;
706 break;
707 }
708 case 'v': {
709 struct iovec *iov = va_arg(ap, struct iovec *);
710 int *iovcnt = va_arg(ap, int *);
711 *iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
712 break;
713 }
714 case 's': {
715 V9fsString *str = va_arg(ap, V9fsString *);
716 offset += pdu_unmarshal(pdu, offset, "w", &str->size);
717 /* FIXME: sanity check str->size */
718 str->data = qemu_malloc(str->size + 1);
719 offset += pdu_unpack(str->data, pdu, offset, str->size);
720 str->data[str->size] = 0;
721 break;
722 }
723 case 'Q': {
724 V9fsQID *qidp = va_arg(ap, V9fsQID *);
725 offset += pdu_unmarshal(pdu, offset, "bdq",
726 &qidp->type, &qidp->version, &qidp->path);
727 break;
728 }
729 case 'S': {
730 V9fsStat *statp = va_arg(ap, V9fsStat *);
731 offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
732 &statp->size, &statp->type, &statp->dev,
733 &statp->qid, &statp->mode, &statp->atime,
734 &statp->mtime, &statp->length,
735 &statp->name, &statp->uid, &statp->gid,
736 &statp->muid, &statp->extension,
737 &statp->n_uid, &statp->n_gid,
738 &statp->n_muid);
739 break;
740 }
c79ce737
SK		 741 case 'I': {
742 V9fsIattr *iattr = va_arg(ap, V9fsIattr *);
743 offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
744 &iattr->valid, &iattr->mode,
745 &iattr->uid, &iattr->gid, &iattr->size,
746 &iattr->atime_sec, &iattr->atime_nsec,
747 &iattr->mtime_sec, &iattr->mtime_nsec);
748 break;
749 }
405a549a
AL		 750 default:
751 break;
752 }
753 }
754
755 va_end(ap);
756
757 return offset - old_offset;
758}
759
760static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
761{
762 size_t old_offset = offset;
763 va_list ap;
764 int i;
765
766 va_start(ap, fmt);
767 for (i = 0; fmt[i]; i++) {
768 switch (fmt[i]) {
769 case 'b': {
770 uint8_t val = va_arg(ap, int);
771 offset += pdu_pack(pdu, offset, &val, sizeof(val));
772 break;
773 }
774 case 'w': {
775 uint16_t val;
776 cpu_to_le16w(&val, va_arg(ap, int));
777 offset += pdu_pack(pdu, offset, &val, sizeof(val));
778 break;
779 }
780 case 'd': {
781 uint32_t val;
782 cpu_to_le32w(&val, va_arg(ap, uint32_t));
783 offset += pdu_pack(pdu, offset, &val, sizeof(val));
784 break;
785 }
786 case 'q': {
787 uint64_t val;
788 cpu_to_le64w(&val, va_arg(ap, uint64_t));
789 offset += pdu_pack(pdu, offset, &val, sizeof(val));
790 break;
791 }
792 case 'v': {
793 struct iovec *iov = va_arg(ap, struct iovec *);
794 int *iovcnt = va_arg(ap, int *);
795 *iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
796 break;
797 }
798 case 's': {
799 V9fsString *str = va_arg(ap, V9fsString *);
800 offset += pdu_marshal(pdu, offset, "w", str->size);
801 offset += pdu_pack(pdu, offset, str->data, str->size);
802 break;
803 }
804 case 'Q': {
805 V9fsQID *qidp = va_arg(ap, V9fsQID *);
806 offset += pdu_marshal(pdu, offset, "bdq",
807 qidp->type, qidp->version, qidp->path);
808 break;
809 }
810 case 'S': {
811 V9fsStat *statp = va_arg(ap, V9fsStat *);
812 offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
813 statp->size, statp->type, statp->dev,
814 &statp->qid, statp->mode, statp->atime,
815 statp->mtime, statp->length, &statp->name,
816 &statp->uid, &statp->gid, &statp->muid,
817 &statp->extension, statp->n_uid,
818 statp->n_gid, statp->n_muid);
819 break;
820 }
00ede4c2
SK		 821 case 'A': {
822 V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *);
823 offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
824 statp->st_result_mask,
825 &statp->qid, statp->st_mode,
826 statp->st_uid, statp->st_gid,
827 statp->st_nlink, statp->st_rdev,
828 statp->st_size, statp->st_blksize, statp->st_blocks,
829 statp->st_atime_sec, statp->st_atime_nsec,
830 statp->st_mtime_sec, statp->st_mtime_nsec,
831 statp->st_ctime_sec, statp->st_ctime_nsec,
832 statp->st_btime_sec, statp->st_btime_nsec,
833 statp->st_gen, statp->st_data_version);
834 break;
835 }
405a549a
AL		 836 default:
837 break;
838 }
839 }
840 va_end(ap);
841
842 return offset - old_offset;
843}
844
845static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len)
846{
847 int8_t id = pdu->id + 1; /* Response */
848
849 if (len < 0) {
405a549a 850 int err = -len;
8f4d1ca5 851 len = 7;
405a549a 852
8f4d1ca5
AB		 853 if (s->proto_version != V9FS_PROTO_2000L) {
854 V9fsString str;
855
856 str.data = strerror(err);
857 str.size = strlen(str.data);
858
859 len += pdu_marshal(pdu, len, "s", &str);
860 id = P9_RERROR;
861 }
405a549a 862
cf03eb2c 863 len += pdu_marshal(pdu, len, "d", err);
405a549a 864
8f4d1ca5
AB		 865 if (s->proto_version == V9FS_PROTO_2000L) {
866 id = P9_RLERROR;
867 }
405a549a
AL		 868 }
869
870 /* fill out the header */
871 pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag);
872
873 /* keep these in sync */
874 pdu->size = len;
875 pdu->id = id;
876
877 /* push onto queue and notify */
878 virtqueue_push(s->vq, &pdu->elem, len);
879
880 /* FIXME: we should batch these completions */
881 virtio_notify(&s->vdev, s->vq);
882
883 free_pdu(s, pdu);
884}
885
bb9e3216
AL		 886static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
887{
888 mode_t ret;
889
890 ret = mode & 0777;
891 if (mode & P9_STAT_MODE_DIR) {
892 ret |= S_IFDIR;
893 }
894
cf03eb2c
AB		 895 if (mode & P9_STAT_MODE_SYMLINK) {
896 ret |= S_IFLNK;
897 }
898 if (mode & P9_STAT_MODE_SOCKET) {
899 ret |= S_IFSOCK;
900 }
901 if (mode & P9_STAT_MODE_NAMED_PIPE) {
902 ret |= S_IFIFO;
903 }
904 if (mode & P9_STAT_MODE_DEVICE) {
905 if (extension && extension->data[0] == 'c') {
906 ret |= S_IFCHR;
907 } else {
908 ret |= S_IFBLK;
bb9e3216
AL		 909 }
910 }
911
912 if (!(ret&~0777)) {
913 ret |= S_IFREG;
914 }
915
916 if (mode & P9_STAT_MODE_SETUID) {
917 ret |= S_ISUID;
918 }
919 if (mode & P9_STAT_MODE_SETGID) {
920 ret |= S_ISGID;
921 }
922 if (mode & P9_STAT_MODE_SETVTX) {
923 ret |= S_ISVTX;
924 }
925
926 return ret;
927}
928
929static int donttouch_stat(V9fsStat *stat)
930{
931 if (stat->type == -1 &&
932 stat->dev == -1 &&
933 stat->qid.type == -1 &&
934 stat->qid.version == -1 &&
935 stat->qid.path == -1 &&
936 stat->mode == -1 &&
937 stat->atime == -1 &&
938 stat->mtime == -1 &&
939 stat->length == -1 &&
940 !stat->name.size &&
941 !stat->uid.size &&
942 !stat->gid.size &&
943 !stat->muid.size &&
944 stat->n_uid == -1 &&
945 stat->n_gid == -1 &&
946 stat->n_muid == -1) {
947 return 1;
948 }
949
950 return 0;
951}
952
953static void v9fs_stat_free(V9fsStat *stat)
954{
955 v9fs_string_free(&stat->name);
956 v9fs_string_free(&stat->uid);
957 v9fs_string_free(&stat->gid);
958 v9fs_string_free(&stat->muid);
959 v9fs_string_free(&stat->extension);
960}
961
962static uint32_t stat_to_v9mode(const struct stat *stbuf)
963{
964 uint32_t mode;
965
966 mode = stbuf->st_mode & 0777;
967 if (S_ISDIR(stbuf->st_mode)) {
968 mode |= P9_STAT_MODE_DIR;
969 }
970
cf03eb2c
AB		 971 if (S_ISLNK(stbuf->st_mode)) {
972 mode |= P9_STAT_MODE_SYMLINK;
973 }
bb9e3216 974
cf03eb2c
AB		 975 if (S_ISSOCK(stbuf->st_mode)) {
976 mode |= P9_STAT_MODE_SOCKET;
977 }
bb9e3216 978
cf03eb2c
AB		 979 if (S_ISFIFO(stbuf->st_mode)) {
980 mode |= P9_STAT_MODE_NAMED_PIPE;
981 }
bb9e3216 982
cf03eb2c
AB		 983 if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
984 mode |= P9_STAT_MODE_DEVICE;
985 }
bb9e3216 986
cf03eb2c
AB		 987 if (stbuf->st_mode & S_ISUID) {
988 mode |= P9_STAT_MODE_SETUID;
989 }
bb9e3216 990
cf03eb2c
AB		 991 if (stbuf->st_mode & S_ISGID) {
992 mode |= P9_STAT_MODE_SETGID;
993 }
bb9e3216 994
cf03eb2c
AB		 995 if (stbuf->st_mode & S_ISVTX) {
996 mode |= P9_STAT_MODE_SETVTX;
bb9e3216
AL		 997 }
998
999 return mode;
1000}
1001
1002static int stat_to_v9stat(V9fsState *s, V9fsString *name,
1003 const struct stat *stbuf,
1004 V9fsStat *v9stat)
1005{
1006 int err;
1007 const char *str;
1008
1009 memset(v9stat, 0, sizeof(*v9stat));
1010
1011 stat_to_qid(stbuf, &v9stat->qid);
1012 v9stat->mode = stat_to_v9mode(stbuf);
1013 v9stat->atime = stbuf->st_atime;
1014 v9stat->mtime = stbuf->st_mtime;
1015 v9stat->length = stbuf->st_size;
1016
1017 v9fs_string_null(&v9stat->uid);
1018 v9fs_string_null(&v9stat->gid);
1019 v9fs_string_null(&v9stat->muid);
1020
cf03eb2c
AB		 1021 v9stat->n_uid = stbuf->st_uid;
1022 v9stat->n_gid = stbuf->st_gid;
1023 v9stat->n_muid = 0;
bb9e3216 1024
cf03eb2c 1025 v9fs_string_null(&v9stat->extension);
bb9e3216 1026
cf03eb2c
AB		 1027 if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
1028 err = v9fs_do_readlink(s, name, &v9stat->extension);
1029 if (err == -1) {
1030 err = -errno;
1031 return err;
bb9e3216 1032 }
cf03eb2c
AB		 1033 v9stat->extension.data[err] = 0;
1034 v9stat->extension.size = err;
1035 } else if (v9stat->mode & P9_STAT_MODE_DEVICE) {
1036 v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
1037 S_ISCHR(stbuf->st_mode) ? 'c' : 'b',
1038 major(stbuf->st_rdev), minor(stbuf->st_rdev));
1039 } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) {
c9ba47dc
SW		 1040 v9fs_string_sprintf(&v9stat->extension, "%s %lu",
1041 "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink);
bb9e3216
AL		 1042 }
1043
1044 str = strrchr(name->data, '/');
1045 if (str) {
1046 str += 1;
1047 } else {
1048 str = name->data;
1049 }
1050
1051 v9fs_string_sprintf(&v9stat->name, "%s", str);
1052
1053 v9stat->size = 61 +
1054 v9fs_string_size(&v9stat->name) +
1055 v9fs_string_size(&v9stat->uid) +
1056 v9fs_string_size(&v9stat->gid) +
1057 v9fs_string_size(&v9stat->muid) +
1058 v9fs_string_size(&v9stat->extension);
1059 return 0;
1060}
1061
00ede4c2
SK		 1062#define P9_STATS_MODE 0x00000001ULL
1063#define P9_STATS_NLINK 0x00000002ULL
1064#define P9_STATS_UID 0x00000004ULL
1065#define P9_STATS_GID 0x00000008ULL
1066#define P9_STATS_RDEV 0x00000010ULL
1067#define P9_STATS_ATIME 0x00000020ULL
1068#define P9_STATS_MTIME 0x00000040ULL
1069#define P9_STATS_CTIME 0x00000080ULL
1070#define P9_STATS_INO 0x00000100ULL
1071#define P9_STATS_SIZE 0x00000200ULL
1072#define P9_STATS_BLOCKS 0x00000400ULL
1073
1074#define P9_STATS_BTIME 0x00000800ULL
1075#define P9_STATS_GEN 0x00001000ULL
1076#define P9_STATS_DATA_VERSION 0x00002000ULL
1077
1078#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1079#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1080
1081
1082static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf,
1083 V9fsStatDotl *v9lstat)
1084{
1085 memset(v9lstat, 0, sizeof(*v9lstat));
1086
1087 v9lstat->st_mode = stbuf->st_mode;
1088 v9lstat->st_nlink = stbuf->st_nlink;
1089 v9lstat->st_uid = stbuf->st_uid;
1090 v9lstat->st_gid = stbuf->st_gid;
1091 v9lstat->st_rdev = stbuf->st_rdev;
1092 v9lstat->st_size = stbuf->st_size;
1093 v9lstat->st_blksize = stbuf->st_blksize;
1094 v9lstat->st_blocks = stbuf->st_blocks;
1095 v9lstat->st_atime_sec = stbuf->st_atime;
1096 v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec;
1097 v9lstat->st_mtime_sec = stbuf->st_mtime;
1098 v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec;
1099 v9lstat->st_ctime_sec = stbuf->st_ctime;
1100 v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec;
1101 /* Currently we only support BASIC fields in stat */
1102 v9lstat->st_result_mask = P9_STATS_BASIC;
1103
1104 stat_to_qid(stbuf, &v9lstat->qid);
1105}
1106
1f5a89bf
AL		 1107static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt)
1108{
1109 while (len && *iovcnt) {
1110 if (len < sg->iov_len) {
1111 sg->iov_len -= len;
1112 sg->iov_base += len;
1113 len = 0;
1114 } else {
1115 len -= sg->iov_len;
1116 sg++;
1117 *iovcnt -= 1;
1118 }
1119 }
1120
1121 return sg;
1122}
1123
1124static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt)
1125{
1126 int i;
1127 int total = 0;
1128
1129 for (i = 0; i < *cnt; i++) {
1130 if ((total + sg[i].iov_len) > cap) {
1131 sg[i].iov_len -= ((total + sg[i].iov_len) - cap);
1132 i++;
1133 break;
1134 }
1135 total += sg[i].iov_len;
1136 }
1137
1138 *cnt = i;
1139
1140 return sg;
1141}
1142
1143static void print_sg(struct iovec *sg, int cnt)
1144{
1145 int i;
1146
1147 printf("sg[%d]: {", cnt);
1148 for (i = 0; i < cnt; i++) {
1149 if (i) {
1150 printf(", ");
1151 }
1152 printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
1153 }
1154 printf("}\n");
1155}
1156
8cf89e00
AL		 1157static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len)
1158{
1159 V9fsString str;
1160 v9fs_string_init(&str);
1161 v9fs_string_copy(&str, dst);
1162 v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
1163 v9fs_string_free(&str);
1164}
1165
9f107513
AL		 1166static void v9fs_version(V9fsState *s, V9fsPDU *pdu)
1167{
92c1ad03
AL		 1168 V9fsString version;
1169 size_t offset = 7;
1170
5e94c103 1171 pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
92c1ad03 1172
84151514
MK		 1173 if (!strcmp(version.data, "9P2000.u")) {
1174 s->proto_version = V9FS_PROTO_2000U;
1175 } else if (!strcmp(version.data, "9P2000.L")) {
1176 s->proto_version = V9FS_PROTO_2000L;
1177 } else {
92c1ad03 1178 v9fs_string_sprintf(&version, "unknown");
9f107513 1179 }
92c1ad03 1180
5e94c103 1181 offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
92c1ad03
AL		 1182 complete_pdu(s, pdu, offset);
1183
1184 v9fs_string_free(&version);
9f107513
AL		 1185}
1186
1187static void v9fs_attach(V9fsState *s, V9fsPDU *pdu)
1188{
955efc47
AL		 1189 int32_t fid, afid, n_uname;
1190 V9fsString uname, aname;
1191 V9fsFidState *fidp;
1192 V9fsQID qid;
1193 size_t offset = 7;
1194 ssize_t err;
1195
1196 pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
1197
1198 fidp = alloc_fid(s, fid);
1199 if (fidp == NULL) {
1200 err = -EINVAL;
1201 goto out;
9f107513 1202 }
955efc47
AL		 1203
1204 fidp->uid = n_uname;
1205
1206 v9fs_string_sprintf(&fidp->path, "%s", "/");
1207 err = fid_to_qid(s, fidp, &qid);
1208 if (err) {
1209 err = -EINVAL;
1210 free_fid(s, fid);
1211 goto out;
1212 }
1213
1214 offset += pdu_marshal(pdu, offset, "Q", &qid);
1215
1216 err = offset;
1217out:
1218 complete_pdu(s, pdu, err);
1219 v9fs_string_free(&uname);
1220 v9fs_string_free(&aname);
9f107513
AL		 1221}
1222
4da7d3fa
AL		 1223static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err)
1224{
1225 if (err == -1) {
1226 err = -errno;
1227 goto out;
1228 }
1229
1230 err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat);
1231 if (err) {
1232 goto out;
1233 }
1234 vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat);
1235 err = vs->offset;
1236
1237out:
1238 complete_pdu(s, vs->pdu, err);
1239 v9fs_stat_free(&vs->v9stat);
1240 qemu_free(vs);
1241}
1242
9f107513
AL		 1243static void v9fs_stat(V9fsState *s, V9fsPDU *pdu)
1244{
4da7d3fa
AL		 1245 int32_t fid;
1246 V9fsStatState *vs;
1247 ssize_t err = 0;
1248
1249 vs = qemu_malloc(sizeof(*vs));
1250 vs->pdu = pdu;
1251 vs->offset = 7;
1252
1253 memset(&vs->v9stat, 0, sizeof(vs->v9stat));
1254
1255 pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
1256
1257 vs->fidp = lookup_fid(s, fid);
1258 if (vs->fidp == NULL) {
1259 err = -ENOENT;
1260 goto out;
9f107513 1261 }
4da7d3fa
AL		 1262
1263 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1264 v9fs_stat_post_lstat(s, vs, err);
1265 return;
1266
1267out:
1268 complete_pdu(s, vs->pdu, err);
1269 v9fs_stat_free(&vs->v9stat);
1270 qemu_free(vs);
9f107513
AL		 1271}
1272
00ede4c2
SK		 1273static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs,
1274 int err)
1275{
1276 if (err == -1) {
1277 err = -errno;
1278 goto out;
1279 }
1280
1281 stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl);
1282 vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
1283 err = vs->offset;
1284
1285out:
1286 complete_pdu(s, vs->pdu, err);
1287 qemu_free(vs);
1288}
1289
1290static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu)
1291{
1292 int32_t fid;
1293 V9fsStatStateDotl *vs;
1294 ssize_t err = 0;
1295 V9fsFidState *fidp;
1296 uint64_t request_mask;
1297
1298 vs = qemu_malloc(sizeof(*vs));
1299 vs->pdu = pdu;
1300 vs->offset = 7;
1301
1302 memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl));
1303
1304 pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
1305
1306 fidp = lookup_fid(s, fid);
1307 if (fidp == NULL) {
1308 err = -ENOENT;
1309 goto out;
1310 }
1311
1312 /* Currently we only support BASIC fields in stat, so there is no
1313 * need to look at request_mask.
1314 */
1315 err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf);
1316 v9fs_getattr_post_lstat(s, vs, err);
1317 return;
1318
1319out:
1320 complete_pdu(s, vs->pdu, err);
1321 qemu_free(vs);
1322}
1323
c79ce737
SK		 1324/* From Linux kernel code */
1325#define ATTR_MODE (1 << 0)
1326#define ATTR_UID (1 << 1)
1327#define ATTR_GID (1 << 2)
1328#define ATTR_SIZE (1 << 3)
1329#define ATTR_ATIME (1 << 4)
1330#define ATTR_MTIME (1 << 5)
1331#define ATTR_CTIME (1 << 6)
1332#define ATTR_MASK 127
1333#define ATTR_ATIME_SET (1 << 7)
1334#define ATTR_MTIME_SET (1 << 8)
1335
1336static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs,
1337 int err)
1338{
1339 if (err == -1) {
1340 err = -errno;
1341 goto out;
1342 }
1343 err = vs->offset;
1344
1345out:
1346 complete_pdu(s, vs->pdu, err);
1347 qemu_free(vs);
1348}
1349
1350static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err)
1351{
1352 if (err == -1) {
1353 err = -errno;
1354 goto out;
1355 }
1356
1357 if (vs->v9iattr.valid & (ATTR_SIZE)) {
1358 err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size);
1359 }
1360 v9fs_setattr_post_truncate(s, vs, err);
1361 return;
1362
1363out:
1364 complete_pdu(s, vs->pdu, err);
1365 qemu_free(vs);
1366}
1367
1368static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs,
1369 int err)
1370{
1371 if (err == -1) {
1372 err = -errno;
1373 goto out;
1374 }
1375
1376 /* If the only valid entry in iattr is ctime we can call
1377 * chown(-1,-1) to update the ctime of the file
1378 */
1379 if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
1380 ((vs->v9iattr.valid & ATTR_CTIME)
1381 && !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) {
1382 if (!(vs->v9iattr.valid & ATTR_UID)) {
1383 vs->v9iattr.uid = -1;
1384 }
1385 if (!(vs->v9iattr.valid & ATTR_GID)) {
1386 vs->v9iattr.gid = -1;
1387 }
1388 err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid,
1389 vs->v9iattr.gid);
1390 }
1391 v9fs_setattr_post_chown(s, vs, err);
1392 return;
1393
1394out:
1395 complete_pdu(s, vs->pdu, err);
1396 qemu_free(vs);
1397}
1398
1399static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err)
1400{
1401 if (err == -1) {
1402 err = -errno;
1403 goto out;
1404 }
1405
1406 if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
1407 struct timespec times[2];
1408 if (vs->v9iattr.valid & ATTR_ATIME) {
1409 if (vs->v9iattr.valid & ATTR_ATIME_SET) {
1410 times[0].tv_sec = vs->v9iattr.atime_sec;
1411 times[0].tv_nsec = vs->v9iattr.atime_nsec;
1412 } else {
1413 times[0].tv_nsec = UTIME_NOW;
1414 }
1415 } else {
1416 times[0].tv_nsec = UTIME_OMIT;
1417 }
1418
1419 if (vs->v9iattr.valid & ATTR_MTIME) {
1420 if (vs->v9iattr.valid & ATTR_MTIME_SET) {
1421 times[1].tv_sec = vs->v9iattr.mtime_sec;
1422 times[1].tv_nsec = vs->v9iattr.mtime_nsec;
1423 } else {
1424 times[1].tv_nsec = UTIME_NOW;
1425 }
1426 } else {
1427 times[1].tv_nsec = UTIME_OMIT;
1428 }
1429 err = v9fs_do_utimensat(s, &vs->fidp->path, times);
1430 }
1431 v9fs_setattr_post_utimensat(s, vs, err);
1432 return;
1433
1434out:
1435 complete_pdu(s, vs->pdu, err);
1436 qemu_free(vs);
1437}
1438
1439static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu)
1440{
1441 int32_t fid;
1442 V9fsSetattrState *vs;
1443 int err = 0;
1444
1445 vs = qemu_malloc(sizeof(*vs));
1446 vs->pdu = pdu;
1447 vs->offset = 7;
1448
1449 pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr);
1450
1451 vs->fidp = lookup_fid(s, fid);
1452 if (vs->fidp == NULL) {
1453 err = -EINVAL;
1454 goto out;
1455 }
1456
1457 if (vs->v9iattr.valid & ATTR_MODE) {
1458 err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode);
1459 }
1460
1461 v9fs_setattr_post_chmod(s, vs, err);
1462 return;
1463
1464out:
1465 complete_pdu(s, vs->pdu, err);
1466 qemu_free(vs);
1467}
1468
ff5e54c9
AL		 1469static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err)
1470{
1471 complete_pdu(s, vs->pdu, err);
1472
1473 if (vs->nwnames) {
1474 for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) {
1475 v9fs_string_free(&vs->wnames[vs->name_idx]);
1476 }
1477
1478 qemu_free(vs->wnames);
1479 qemu_free(vs->qids);
1480 }
1481}
1482
1483static void v9fs_walk_marshal(V9fsWalkState *vs)
1484{
1485 int i;
1486 vs->offset = 7;
1487 vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
1488
1489 for (i = 0; i < vs->nwnames; i++) {
1490 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
1491 }
1492}
1493
1494static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs,
1495 int err)
1496{
1497 if (err == -1) {
1498 free_fid(s, vs->newfidp->fid);
1499 v9fs_string_free(&vs->path);
1500 err = -ENOENT;
1501 goto out;
1502 }
1503
1504 stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
1505
1506 vs->name_idx++;
1507 if (vs->name_idx < vs->nwnames) {
1508 v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
1509 vs->wnames[vs->name_idx].data);
1510 v9fs_string_copy(&vs->newfidp->path, &vs->path);
1511
1512 err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
1513 v9fs_walk_post_newfid_lstat(s, vs, err);
1514 return;
1515 }
1516
1517 v9fs_string_free(&vs->path);
1518 v9fs_walk_marshal(vs);
1519 err = vs->offset;
1520out:
1521 v9fs_walk_complete(s, vs, err);
1522}
1523
1524static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs,
1525 int err)
1526{
1527 if (err == -1) {
1528 v9fs_string_free(&vs->path);
1529 err = -ENOENT;
1530 goto out;
1531 }
1532
1533 stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
1534 vs->name_idx++;
1535 if (vs->name_idx < vs->nwnames) {
1536
1537 v9fs_string_sprintf(&vs->path, "%s/%s",
1538 vs->fidp->path.data, vs->wnames[vs->name_idx].data);
1539 v9fs_string_copy(&vs->fidp->path, &vs->path);
1540
1541 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1542 v9fs_walk_post_oldfid_lstat(s, vs, err);
1543 return;
1544 }
1545
1546 v9fs_string_free(&vs->path);
1547 v9fs_walk_marshal(vs);
1548 err = vs->offset;
1549out:
1550 v9fs_walk_complete(s, vs, err);
1551}
1552
9f107513
AL		 1553static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
1554{
ff5e54c9
AL		 1555 int32_t fid, newfid;
1556 V9fsWalkState *vs;
1557 int err = 0;
1558 int i;
1559
1560 vs = qemu_malloc(sizeof(*vs));
1561 vs->pdu = pdu;
1562 vs->wnames = NULL;
1563 vs->qids = NULL;
1564 vs->offset = 7;
1565
1566 vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
1567 &newfid, &vs->nwnames);
1568
1569 if (vs->nwnames) {
1570 vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames);
1571
1572 vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames);
1573
1574 for (i = 0; i < vs->nwnames; i++) {
1575 vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
1576 &vs->wnames[i]);
1577 }
1578 }
1579
1580 vs->fidp = lookup_fid(s, fid);
1581 if (vs->fidp == NULL) {
1582 err = -ENOENT;
1583 goto out;
1584 }
1585
1586 /* FIXME: is this really valid? */
1587 if (fid == newfid) {
1588
d62dbb51 1589 BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
ff5e54c9
AL		 1590 v9fs_string_init(&vs->path);
1591 vs->name_idx = 0;
1592
1593 if (vs->name_idx < vs->nwnames) {
1594 v9fs_string_sprintf(&vs->path, "%s/%s",
1595 vs->fidp->path.data, vs->wnames[vs->name_idx].data);
1596 v9fs_string_copy(&vs->fidp->path, &vs->path);
1597
1598 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1599 v9fs_walk_post_oldfid_lstat(s, vs, err);
1600 return;
1601 }
1602 } else {
1603 vs->newfidp = alloc_fid(s, newfid);
1604 if (vs->newfidp == NULL) {
1605 err = -EINVAL;
1606 goto out;
1607 }
1608
1609 vs->newfidp->uid = vs->fidp->uid;
1610 v9fs_string_init(&vs->path);
1611 vs->name_idx = 0;
1612 v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path);
1613
1614 if (vs->name_idx < vs->nwnames) {
1615 v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
1616 vs->wnames[vs->name_idx].data);
1617 v9fs_string_copy(&vs->newfidp->path, &vs->path);
1618
1619 err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
1620 v9fs_walk_post_newfid_lstat(s, vs, err);
1621 return;
1622 }
9f107513 1623 }
ff5e54c9
AL		 1624
1625 v9fs_walk_marshal(vs);
1626 err = vs->offset;
1627out:
1628 v9fs_walk_complete(s, vs, err);
9f107513
AL		 1629}
1630
5e94c103
MK		 1631static int32_t get_iounit(V9fsState *s, V9fsString *name)
1632{
1633 struct statfs stbuf;
1634 int32_t iounit = 0;
1635
1636 /*
1637 * iounit should be multiples of f_bsize (host filesystem block size
1638 * and as well as less than (client msize - P9_IOHDRSZ))
1639 */
1640 if (!v9fs_do_statfs(s, name, &stbuf)) {
1641 iounit = stbuf.f_bsize;
1642 iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize;
1643 }
1644
1645 if (!iounit) {
1646 iounit = s->msize - P9_IOHDRSZ;
1647 }
1648 return iounit;
1649}
1650
a6568fe2
AL		 1651static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err)
1652{
d62dbb51 1653 if (vs->fidp->fs.dir == NULL) {
a6568fe2
AL		 1654 err = -errno;
1655 goto out;
1656 }
d62dbb51 1657 vs->fidp->fid_type = P9_FID_DIR;
a6568fe2
AL		 1658 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0);
1659 err = vs->offset;
1660out:
1661 complete_pdu(s, vs->pdu, err);
1662 qemu_free(vs);
1663
1664}
1665
5e94c103
MK		 1666static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs)
1667{
1668 int err;
1669 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
1670 err = vs->offset;
1671 complete_pdu(s, vs->pdu, err);
1672 qemu_free(vs);
1673}
1674
a6568fe2
AL		 1675static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err)
1676{
d62dbb51 1677 if (vs->fidp->fs.fd == -1) {
a6568fe2
AL		 1678 err = -errno;
1679 goto out;
1680 }
d62dbb51 1681 vs->fidp->fid_type = P9_FID_FILE;
5e94c103
MK		 1682 vs->iounit = get_iounit(s, &vs->fidp->path);
1683 v9fs_open_post_getiounit(s, vs);
1684 return;
a6568fe2
AL		 1685out:
1686 complete_pdu(s, vs->pdu, err);
1687 qemu_free(vs);
1688}
1689
1690static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err)
1691{
771e9d4c
MK		 1692 int flags;
1693
a6568fe2
AL		 1694 if (err) {
1695 err = -errno;
1696 goto out;
1697 }
1698
1699 stat_to_qid(&vs->stbuf, &vs->qid);
1700
1701 if (S_ISDIR(vs->stbuf.st_mode)) {
d62dbb51 1702 vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path);
a6568fe2
AL		 1703 v9fs_open_post_opendir(s, vs, err);
1704 } else {
771e9d4c 1705 if (s->proto_version == V9FS_PROTO_2000L) {
771e9d4c 1706 flags = vs->mode;
630c2689 1707 flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT);
0f8151cb
VJ		 1708 /* Ignore direct disk access hint until the server supports it. */
1709 flags &= ~O_DIRECT;
771e9d4c
MK		 1710 } else {
1711 flags = omode_to_uflags(vs->mode);
1712 }
d62dbb51 1713 vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags);
a6568fe2
AL		 1714 v9fs_open_post_open(s, vs, err);
1715 }
1716 return;
1717out:
1718 complete_pdu(s, vs->pdu, err);
1719 qemu_free(vs);
9f107513
AL		 1720}
1721
1722static void v9fs_open(V9fsState *s, V9fsPDU *pdu)
a6568fe2
AL		 1723{
1724 int32_t fid;
1725 V9fsOpenState *vs;
1726 ssize_t err = 0;
1727
a6568fe2
AL		 1728 vs = qemu_malloc(sizeof(*vs));
1729 vs->pdu = pdu;
1730 vs->offset = 7;
771e9d4c 1731 vs->mode = 0;
a6568fe2 1732
771e9d4c
MK		 1733 if (s->proto_version == V9FS_PROTO_2000L) {
1734 pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode);
1735 } else {
1736 pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
1737 }
a6568fe2
AL		 1738
1739 vs->fidp = lookup_fid(s, fid);
1740 if (vs->fidp == NULL) {
1741 err = -ENOENT;
1742 goto out;
1743 }
1744
d62dbb51 1745 BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
a6568fe2
AL		 1746
1747 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1748
1749 v9fs_open_post_lstat(s, vs, err);
1750 return;
1751out:
1752 complete_pdu(s, pdu, err);
1753 qemu_free(vs);
1754}
1755
c1568af5
VJ		 1756static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err)
1757{
1758 if (err == 0) {
1759 v9fs_string_copy(&vs->fidp->path, &vs->fullname);
1760 stat_to_qid(&vs->stbuf, &vs->qid);
1761 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
1762 &vs->iounit);
1763 err = vs->offset;
1764 } else {
d62dbb51 1765 vs->fidp->fid_type = P9_FID_NONE;
c1568af5 1766 err = -errno;
ab03b63d
SK		 1767 if (vs->fidp->fs.fd > 0) {
1768 close(vs->fidp->fs.fd);
1769 }
c1568af5
VJ		 1770 }
1771
1772 complete_pdu(s, vs->pdu, err);
1773 v9fs_string_free(&vs->name);
1774 v9fs_string_free(&vs->fullname);
1775 qemu_free(vs);
1776}
1777
1778static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs,
1779 int err)
1780{
1781 if (err) {
1782 err = -errno;
1783 goto out;
1784 }
1785 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
1786
1787out:
1788 v9fs_post_lcreate(s, vs, err);
1789}
1790
1791static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs,
1792 int err)
1793{
d62dbb51 1794 if (vs->fidp->fs.fd == -1) {
c1568af5
VJ		 1795 err = -errno;
1796 goto out;
1797 }
d62dbb51 1798 vs->fidp->fid_type = P9_FID_FILE;
c1568af5
VJ		 1799 vs->iounit = get_iounit(s, &vs->fullname);
1800 v9fs_lcreate_post_get_iounit(s, vs, err);
1801 return;
1802
1803out:
1804 v9fs_post_lcreate(s, vs, err);
1805}
1806
1807static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu)
1808{
1809 int32_t dfid, flags, mode;
1810 gid_t gid;
1811 V9fsLcreateState *vs;
1812 ssize_t err = 0;
1813
1814 vs = qemu_malloc(sizeof(*vs));
1815 vs->pdu = pdu;
1816 vs->offset = 7;
1817
1818 v9fs_string_init(&vs->fullname);
1819
1820 pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
1821 &mode, &gid);
1822
1823 vs->fidp = lookup_fid(s, dfid);
1824 if (vs->fidp == NULL) {
1825 err = -ENOENT;
1826 goto out;
1827 }
1828
1829 v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
1830 vs->name.data);
1831
0f8151cb
VJ		 1832 /* Ignore direct disk access hint until the server supports it. */
1833 flags &= ~O_DIRECT;
1834
d62dbb51 1835 vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
c1568af5
VJ		 1836 gid, flags, mode);
1837 v9fs_lcreate_post_do_open2(s, vs, err);
1838 return;
1839
1840out:
1841 complete_pdu(s, vs->pdu, err);
1842 v9fs_string_free(&vs->name);
1843 qemu_free(vs);
1844}
1845
b41e95d3
VJ		 1846static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err)
1847{
1848 if (err == -1) {
1849 err = -errno;
1850 }
1851 complete_pdu(s, pdu, err);
1852}
1853
1854static void v9fs_fsync(V9fsState *s, V9fsPDU *pdu)
1855{
1856 int32_t fid;
1857 size_t offset = 7;
1858 V9fsFidState *fidp;
1859 int err;
1860
1861 pdu_unmarshal(pdu, offset, "d", &fid);
1862 fidp = lookup_fid(s, fid);
1863 if (fidp == NULL) {
1864 err = -ENOENT;
1865 v9fs_post_do_fsync(s, pdu, err);
1866 return;
1867 }
1868 err = v9fs_do_fsync(s, fidp->fs.fd);
1869 v9fs_post_do_fsync(s, pdu, err);
1870}
1871
a6568fe2
AL		 1872static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu)
1873{
bbd5697b
AL		 1874 int32_t fid;
1875 size_t offset = 7;
1876 int err;
1877
1878 pdu_unmarshal(pdu, offset, "d", &fid);
1879
1880 err = free_fid(s, fid);
1881 if (err < 0) {
1882 goto out;
a6568fe2 1883 }
bbd5697b
AL		 1884
1885 offset = 7;
1886 err = offset;
1887out:
1888 complete_pdu(s, pdu, err);
9f107513
AL		 1889}
1890
a9231555
AL		 1891static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t);
1892
1893static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
1894{
1895 if (err) {
1896 goto out;
1897 }
1898 v9fs_stat_free(&vs->v9stat);
1899 v9fs_string_free(&vs->name);
1900 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
1901 vs->offset += vs->count;
1902 err = vs->offset;
1903out:
1904 complete_pdu(s, vs->pdu, err);
1905 qemu_free(vs);
1906 return;
1907}
1908
1909static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs,
1910 ssize_t err)
1911{
1912 if (err) {
1913 err = -errno;
1914 goto out;
1915 }
1916 err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat);
1917 if (err) {
1918 goto out;
1919 }
1920
1921 vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S",
1922 &vs->v9stat);
1923 if ((vs->len != (vs->v9stat.size + 2)) ||
1924 ((vs->count + vs->len) > vs->max_count)) {
d62dbb51 1925 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
a9231555
AL		 1926 v9fs_read_post_seekdir(s, vs, err);
1927 return;
1928 }
1929 vs->count += vs->len;
1930 v9fs_stat_free(&vs->v9stat);
1931 v9fs_string_free(&vs->name);
1932 vs->dir_pos = vs->dent->d_off;
d62dbb51 1933 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
a9231555
AL		 1934 v9fs_read_post_readdir(s, vs, err);
1935 return;
1936out:
d62dbb51 1937 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
a9231555
AL		 1938 v9fs_read_post_seekdir(s, vs, err);
1939 return;
1940
1941}
1942
1943static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
1944{
1945 if (vs->dent) {
1946 memset(&vs->v9stat, 0, sizeof(vs->v9stat));
1947 v9fs_string_init(&vs->name);
1948 v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
1949 vs->dent->d_name);
1950 err = v9fs_do_lstat(s, &vs->name, &vs->stbuf);
1951 v9fs_read_post_dir_lstat(s, vs, err);
1952 return;
1953 }
1954
1955 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
1956 vs->offset += vs->count;
1957 err = vs->offset;
1958 complete_pdu(s, vs->pdu, err);
1959 qemu_free(vs);
1960 return;
1961}
1962
1963static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err)
1964{
d62dbb51 1965 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
a9231555
AL		 1966 v9fs_read_post_readdir(s, vs, err);
1967 return;
1968}
1969
1970static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs,
1971 ssize_t err)
1972{
d62dbb51 1973 vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
a9231555
AL		 1974 v9fs_read_post_telldir(s, vs, err);
1975 return;
1976}
1977
1978static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err)
1979{
1980 if (err < 0) {
1981 /* IO error return the error */
1982 err = -errno;
1983 goto out;
1984 }
1985 vs->total += vs->len;
1986 vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
1987 if (vs->total < vs->count && vs->len > 0) {
1988 do {
1989 if (0) {
1990 print_sg(vs->sg, vs->cnt);
1991 }
d62dbb51 1992 vs->len = v9fs_do_readv(s, vs->fidp->fs.fd, vs->sg, vs->cnt);
a9231555
AL		 1993 } while (vs->len == -1 && errno == EINTR);
1994 if (vs->len == -1) {
1995 err = -errno;
1996 }
1997 v9fs_read_post_readv(s, vs, err);
1998 return;
1999 }
2000 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
2001 vs->offset += vs->count;
2002 err = vs->offset;
2003
2004out:
2005 complete_pdu(s, vs->pdu, err);
2006 qemu_free(vs);
2007}
2008
2009static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err)
2010{
2011 if (err == -1) {
2012 err = -errno;
2013 goto out;
2014 }
2015 vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
2016
2017 if (vs->total < vs->count) {
2018 do {
2019 if (0) {
2020 print_sg(vs->sg, vs->cnt);
2021 }
d62dbb51 2022 vs->len = v9fs_do_readv(s, vs->fidp->fs.fd, vs->sg, vs->cnt);
a9231555
AL		 2023 } while (vs->len == -1 && errno == EINTR);
2024 if (vs->len == -1) {
2025 err = -errno;
2026 }
2027 v9fs_read_post_readv(s, vs, err);
2028 return;
2029 }
2030out:
2031 complete_pdu(s, vs->pdu, err);
2032 qemu_free(vs);
2033}
2034
fa32ef88
AK		 2035static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs)
2036{
2037 ssize_t err = 0;
2038 int read_count;
2039 int64_t xattr_len;
2040
2041 xattr_len = vs->fidp->fs.xattr.len;
2042 read_count = xattr_len - vs->off;
2043 if (read_count > vs->count) {
2044 read_count = vs->count;
2045 } else if (read_count < 0) {
2046 /*
2047 * read beyond XATTR value
2048 */
2049 read_count = 0;
2050 }
2051 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
2052 vs->offset += pdu_pack(vs->pdu, vs->offset,
2053 ((char *)vs->fidp->fs.xattr.value) + vs->off,
2054 read_count);
2055 err = vs->offset;
2056 complete_pdu(s, vs->pdu, err);
2057 qemu_free(vs);
2058}
2059
9f107513
AL		 2060static void v9fs_read(V9fsState *s, V9fsPDU *pdu)
2061{
a9231555
AL		 2062 int32_t fid;
2063 V9fsReadState *vs;
2064 ssize_t err = 0;
2065
2066 vs = qemu_malloc(sizeof(*vs));
2067 vs->pdu = pdu;
2068 vs->offset = 7;
2069 vs->total = 0;
2070 vs->len = 0;
2071 vs->count = 0;
2072
2073 pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
2074
2075 vs->fidp = lookup_fid(s, fid);
2076 if (vs->fidp == NULL) {
2077 err = -EINVAL;
2078 goto out;
2079 }
2080
fa32ef88 2081 if (vs->fidp->fid_type == P9_FID_DIR) {
a9231555
AL		 2082 vs->max_count = vs->count;
2083 vs->count = 0;
2084 if (vs->off == 0) {
d62dbb51 2085 v9fs_do_rewinddir(s, vs->fidp->fs.dir);
a9231555
AL		 2086 }
2087 v9fs_read_post_rewinddir(s, vs, err);
2088 return;
fa32ef88 2089 } else if (vs->fidp->fid_type == P9_FID_FILE) {
a9231555
AL		 2090 vs->sg = vs->iov;
2091 pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt);
d62dbb51 2092 err = v9fs_do_lseek(s, vs->fidp->fs.fd, vs->off, SEEK_SET);
a9231555
AL		 2093 v9fs_read_post_lseek(s, vs, err);
2094 return;
fa32ef88
AK		 2095 } else if (vs->fidp->fid_type == P9_FID_XATTR) {
2096 v9fs_xattr_read(s, vs);
2097 return;
a9231555
AL		 2098 } else {
2099 err = -EINVAL;
9f107513 2100 }
a9231555
AL		 2101out:
2102 complete_pdu(s, pdu, err);
2103 qemu_free(vs);
9f107513
AL		 2104}
2105
c18e2f94
SK		 2106typedef struct V9fsReadDirState {
2107 V9fsPDU *pdu;
2108 V9fsFidState *fidp;
2109 V9fsQID qid;
2110 off_t saved_dir_pos;
2111 struct dirent *dent;
2112 int32_t count;
2113 int32_t max_count;
2114 size_t offset;
2115 int64_t initial_offset;
2116 V9fsString name;
2117} V9fsReadDirState;
2118
2119static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs)
2120{
2121 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
2122 vs->offset += vs->count;
2123 complete_pdu(s, vs->pdu, vs->offset);
2124 qemu_free(vs);
2125 return;
2126}
2127
2128/* Size of each dirent on the wire: size of qid (13) + size of offset (8)
2129 * size of type (1) + size of name.size (2) + strlen(name.data)
2130 */
2131#define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data))
2132
2133static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs)
2134{
2135 int len;
2136 size_t size;
2137
2138 if (vs->dent) {
2139 v9fs_string_init(&vs->name);
2140 v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name);
2141
2142 if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
2143 /* Ran out of buffer. Set dir back to old position and return */
d62dbb51 2144 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos);
c18e2f94
SK		 2145 v9fs_readdir_post_seekdir(s, vs);
2146 return;
2147 }
2148
2149 /* Fill up just the path field of qid because the client uses
2150 * only that. To fill the entire qid structure we will have
2151 * to stat each dirent found, which is expensive
2152 */
2153 size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path));
2154 memcpy(&vs->qid.path, &vs->dent->d_ino, size);
2155 /* Fill the other fields with dummy values */
2156 vs->qid.type = 0;
2157 vs->qid.version = 0;
2158
2159 len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs",
2160 &vs->qid, vs->dent->d_off,
2161 vs->dent->d_type, &vs->name);
2162 vs->count += len;
2163 v9fs_string_free(&vs->name);
2164 vs->saved_dir_pos = vs->dent->d_off;
d62dbb51 2165 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
c18e2f94
SK		 2166 v9fs_readdir_post_readdir(s, vs);
2167 return;
2168 }
2169
2170 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
2171 vs->offset += vs->count;
2172 complete_pdu(s, vs->pdu, vs->offset);
2173 qemu_free(vs);
2174 return;
2175}
2176
2177static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs)
2178{
d62dbb51 2179 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
c18e2f94
SK		 2180 v9fs_readdir_post_readdir(s, vs);
2181 return;
2182}
2183
2184static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs)
2185{
d62dbb51 2186 vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
c18e2f94
SK		 2187 v9fs_readdir_post_telldir(s, vs);
2188 return;
2189}
2190
2191static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu)
2192{
2193 int32_t fid;
2194 V9fsReadDirState *vs;
2195 ssize_t err = 0;
2196 size_t offset = 7;
2197
2198 vs = qemu_malloc(sizeof(*vs));
2199 vs->pdu = pdu;
2200 vs->offset = 7;
2201 vs->count = 0;
2202
2203 pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset,
2204 &vs->max_count);
2205
2206 vs->fidp = lookup_fid(s, fid);
d62dbb51 2207 if (vs->fidp == NULL || !(vs->fidp->fs.dir)) {
c18e2f94
SK		 2208 err = -EINVAL;
2209 goto out;
2210 }
2211
2212 if (vs->initial_offset == 0) {
d62dbb51 2213 v9fs_do_rewinddir(s, vs->fidp->fs.dir);
c18e2f94 2214 } else {
d62dbb51 2215 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset);
c18e2f94
SK		 2216 }
2217
2218 v9fs_readdir_post_setdir(s, vs);
2219 return;
2220
2221out:
2222 complete_pdu(s, pdu, err);
2223 qemu_free(vs);
2224 return;
2225}
2226
8449360c
AL		 2227static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs,
2228 ssize_t err)
2229{
2230 if (err < 0) {
2231 /* IO error return the error */
2232 err = -errno;
2233 goto out;
2234 }
2235 vs->total += vs->len;
2236 vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
2237 if (vs->total < vs->count && vs->len > 0) {
2238 do {
2239 if (0) {
2240 print_sg(vs->sg, vs->cnt);
2241 }
d62dbb51 2242 vs->len = v9fs_do_writev(s, vs->fidp->fs.fd, vs->sg, vs->cnt);
8449360c
AL		 2243 } while (vs->len == -1 && errno == EINTR);
2244 if (vs->len == -1) {
2245 err = -errno;
2246 }
2247 v9fs_write_post_writev(s, vs, err);
2248 return;
2249 }
2250 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
2251
2252 err = vs->offset;
2253out:
2254 complete_pdu(s, vs->pdu, err);
2255 qemu_free(vs);
2256}
2257
2258static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err)
2259{
2260 if (err == -1) {
2261 err = -errno;
2262 goto out;
2263 }
2264 vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
2265
2266 if (vs->total < vs->count) {
2267 do {
2268 if (0) {
2269 print_sg(vs->sg, vs->cnt);
2270 }
d62dbb51 2271 vs->len = v9fs_do_writev(s, vs->fidp->fs.fd, vs->sg, vs->cnt);
8449360c
AL		 2272 } while (vs->len == -1 && errno == EINTR);
2273 if (vs->len == -1) {
2274 err = -errno;
2275 }
2276 v9fs_write_post_writev(s, vs, err);
2277 return;
2278 }
2279
2280out:
2281 complete_pdu(s, vs->pdu, err);
2282 qemu_free(vs);
2283}
2284
10b468bd
AK		 2285static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs)
2286{
2287 int i, to_copy;
2288 ssize_t err = 0;
2289 int write_count;
2290 int64_t xattr_len;
2291
2292 xattr_len = vs->fidp->fs.xattr.len;
2293 write_count = xattr_len - vs->off;
2294 if (write_count > vs->count) {
2295 write_count = vs->count;
2296 } else if (write_count < 0) {
2297 /*
2298 * write beyond XATTR value len specified in
2299 * xattrcreate
2300 */
2301 err = -ENOSPC;
2302 goto out;
2303 }
2304 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count);
2305 err = vs->offset;
2306 vs->fidp->fs.xattr.copied_len += write_count;
2307 /*
2308 * Now copy the content from sg list
2309 */
2310 for (i = 0; i < vs->cnt; i++) {
2311 if (write_count > vs->sg[i].iov_len) {
2312 to_copy = vs->sg[i].iov_len;
2313 } else {
2314 to_copy = write_count;
2315 }
2316 memcpy((char *)vs->fidp->fs.xattr.value + vs->off,
2317 vs->sg[i].iov_base, to_copy);
2318 /* updating vs->off since we are not using below */
2319 vs->off += to_copy;
2320 write_count -= to_copy;
2321 }
2322out:
2323 complete_pdu(s, vs->pdu, err);
2324 qemu_free(vs);
2325}
2326
9f107513
AL		 2327static void v9fs_write(V9fsState *s, V9fsPDU *pdu)
2328{
8449360c
AL		 2329 int32_t fid;
2330 V9fsWriteState *vs;
2331 ssize_t err;
2332
2333 vs = qemu_malloc(sizeof(*vs));
2334
2335 vs->pdu = pdu;
2336 vs->offset = 7;
2337 vs->sg = vs->iov;
2338 vs->total = 0;
2339 vs->len = 0;
2340
2341 pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
10b468bd 2342 vs->sg, &vs->cnt);
8449360c
AL		 2343
2344 vs->fidp = lookup_fid(s, fid);
2345 if (vs->fidp == NULL) {
2346 err = -EINVAL;
2347 goto out;
9f107513 2348 }
8449360c 2349
10b468bd
AK		 2350 if (vs->fidp->fid_type == P9_FID_FILE) {
2351 if (vs->fidp->fs.fd == -1) {
2352 err = -EINVAL;
2353 goto out;
2354 }
2355 } else if (vs->fidp->fid_type == P9_FID_XATTR) {
2356 /*
2357 * setxattr operation
2358 */
2359 v9fs_xattr_write(s, vs);
2360 return;
2361 } else {
8449360c
AL		 2362 err = -EINVAL;
2363 goto out;
2364 }
d62dbb51 2365 err = v9fs_do_lseek(s, vs->fidp->fs.fd, vs->off, SEEK_SET);
8449360c
AL		 2366
2367 v9fs_write_post_lseek(s, vs, err);
2368 return;
2369
2370out:
2371 complete_pdu(s, vs->pdu, err);
2372 qemu_free(vs);
9f107513
AL		 2373}
2374
5e94c103 2375static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs)
c494dd6f 2376{
5e94c103
MK		 2377 int err;
2378 v9fs_string_copy(&vs->fidp->path, &vs->fullname);
2379 stat_to_qid(&vs->stbuf, &vs->qid);
c494dd6f 2380
5e94c103
MK		 2381 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
2382 err = vs->offset;
c494dd6f 2383
5e94c103
MK		 2384 complete_pdu(s, vs->pdu, err);
2385 v9fs_string_free(&vs->name);
2386 v9fs_string_free(&vs->extension);
2387 v9fs_string_free(&vs->fullname);
2388 qemu_free(vs);
2389}
2390
2391static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err)
2392{
2393 if (err == 0) {
2394 vs->iounit = get_iounit(s, &vs->fidp->path);
2395 v9fs_create_post_getiounit(s, vs);
2396 return;
c494dd6f
AL		 2397 }
2398
2399 complete_pdu(s, vs->pdu, err);
2400 v9fs_string_free(&vs->name);
2401 v9fs_string_free(&vs->extension);
2402 v9fs_string_free(&vs->fullname);
2403 qemu_free(vs);
2404}
2405
2406static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err)
2407{
2408 if (err) {
2409 err = -errno;
2410 }
2411 v9fs_post_create(s, vs, err);
2412}
2413
2414static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs,
2415 int err)
2416{
d62dbb51 2417 if (!vs->fidp->fs.dir) {
c494dd6f
AL		 2418 err = -errno;
2419 }
d62dbb51 2420 vs->fidp->fid_type = P9_FID_DIR;
c494dd6f
AL		 2421 v9fs_post_create(s, vs, err);
2422}
2423
2424static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs,
2425 int err)
2426{
2427 if (err) {
2428 err = -errno;
2429 goto out;
2430 }
2431
d62dbb51 2432 vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname);
c494dd6f
AL		 2433 v9fs_create_post_opendir(s, vs, err);
2434 return;
2435
2436out:
2437 v9fs_post_create(s, vs, err);
2438}
2439
2440static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err)
2441{
2442 if (err) {
2443 err = -errno;
2444 goto out;
2445 }
2446
2447 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
2448 v9fs_create_post_dir_lstat(s, vs, err);
2449 return;
2450
2451out:
2452 v9fs_post_create(s, vs, err);
2453}
2454
c494dd6f
AL		 2455static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err)
2456{
2457 if (err) {
d62dbb51
AK		 2458 vs->fidp->fid_type = P9_FID_NONE;
2459 close(vs->fidp->fs.fd);
c494dd6f
AL		 2460 err = -errno;
2461 }
c494dd6f
AL		 2462 v9fs_post_create(s, vs, err);
2463 return;
2464}
2465
2466static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err)
2467{
d62dbb51 2468 if (vs->fidp->fs.fd == -1) {
c494dd6f
AL		 2469 err = -errno;
2470 goto out;
2471 }
d62dbb51
AK		 2472 vs->fidp->fid_type = P9_FID_FILE;
2473 err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
c494dd6f
AL		 2474 v9fs_create_post_fstat(s, vs, err);
2475
2476 return;
2477
2478out:
2479 v9fs_post_create(s, vs, err);
2480
2481}
2482
2483static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
2484{
2485
2486 if (err == 0 || errno != ENOENT) {
2487 err = -errno;
2488 goto out;
2489 }
2490
2491 if (vs->perm & P9_STAT_MODE_DIR) {
b67592ea
MK		 2492 err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777,
2493 vs->fidp->uid, -1);
c494dd6f
AL		 2494 v9fs_create_post_mkdir(s, vs, err);
2495 } else if (vs->perm & P9_STAT_MODE_SYMLINK) {
08c60fc9
VJ		 2496 err = v9fs_do_symlink(s, vs->fidp, vs->extension.data,
2497 vs->fullname.data, -1);
c494dd6f
AL		 2498 v9fs_create_post_perms(s, vs, err);
2499 } else if (vs->perm & P9_STAT_MODE_LINK) {
2500 int32_t nfid = atoi(vs->extension.data);
2501 V9fsFidState *nfidp = lookup_fid(s, nfid);
2502 if (nfidp == NULL) {
2503 err = -errno;
2504 v9fs_post_create(s, vs, err);
2505 }
2506 err = v9fs_do_link(s, &nfidp->path, &vs->fullname);
2507 v9fs_create_post_perms(s, vs, err);
2508 } else if (vs->perm & P9_STAT_MODE_DEVICE) {
2509 char ctype;
2510 uint32_t major, minor;
2511 mode_t nmode = 0;
2512
2513 if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major,
2514 &minor) != 3) {
2515 err = -errno;
2516 v9fs_post_create(s, vs, err);
2517 }
2518
2519 switch (ctype) {
2520 case 'c':
2521 nmode = S_IFCHR;
2522 break;
2523 case 'b':
2524 nmode = S_IFBLK;
2525 break;
2526 default:
2527 err = -EIO;
2528 v9fs_post_create(s, vs, err);
2529 }
2530
2531 nmode |= vs->perm & 0777;
5268cecc
MK		 2532 err = v9fs_do_mknod(s, vs->fullname.data, nmode,
2533 makedev(major, minor), vs->fidp->uid, -1);
c494dd6f
AL		 2534 v9fs_create_post_perms(s, vs, err);
2535 } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) {
5268cecc
MK		 2536 err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
2537 0, vs->fidp->uid, -1);
c494dd6f
AL		 2538 v9fs_post_create(s, vs, err);
2539 } else if (vs->perm & P9_STAT_MODE_SOCKET) {
5268cecc
MK		 2540 err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
2541 0, vs->fidp->uid, -1);
63729c36 2542 v9fs_post_create(s, vs, err);
c494dd6f 2543 } else {
d62dbb51 2544 vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
c1568af5
VJ		 2545 -1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
2546
c494dd6f
AL		 2547 v9fs_create_post_open2(s, vs, err);
2548 }
2549
2550 return;
2551
2552out:
2553 v9fs_post_create(s, vs, err);
2554}
2555
9f107513
AL		 2556static void v9fs_create(V9fsState *s, V9fsPDU *pdu)
2557{
c494dd6f
AL		 2558 int32_t fid;
2559 V9fsCreateState *vs;
2560 int err = 0;
2561
2562 vs = qemu_malloc(sizeof(*vs));
2563 vs->pdu = pdu;
2564 vs->offset = 7;
2565
2566 v9fs_string_init(&vs->fullname);
2567
2568 pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
2569 &vs->perm, &vs->mode, &vs->extension);
2570
2571 vs->fidp = lookup_fid(s, fid);
2572 if (vs->fidp == NULL) {
2573 err = -EINVAL;
2574 goto out;
9f107513 2575 }
c494dd6f
AL		 2576
2577 v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
2578 vs->name.data);
2579
2580 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
2581 v9fs_create_post_lstat(s, vs, err);
2582 return;
2583
2584out:
2585 complete_pdu(s, vs->pdu, err);
2586 v9fs_string_free(&vs->name);
2587 v9fs_string_free(&vs->extension);
2588 qemu_free(vs);
9f107513
AL		 2589}
2590
08c60fc9
VJ		 2591static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err)
2592{
2593 if (err == 0) {
2594 stat_to_qid(&vs->stbuf, &vs->qid);
2595 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
2596 err = vs->offset;
2597 } else {
2598 err = -errno;
2599 }
2600 complete_pdu(s, vs->pdu, err);
2601 v9fs_string_free(&vs->name);
2602 v9fs_string_free(&vs->symname);
2603 v9fs_string_free(&vs->fullname);
2604 qemu_free(vs);
2605}
2606
2607static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs,
2608 int err)
2609{
2610 if (err) {
2611 goto out;
2612 }
2613 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
2614out:
2615 v9fs_post_symlink(s, vs, err);
2616}
2617
2618static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu)
2619{
2620 int32_t dfid;
2621 V9fsSymlinkState *vs;
2622 int err = 0;
2623 gid_t gid;
2624
2625 vs = qemu_malloc(sizeof(*vs));
2626 vs->pdu = pdu;
2627 vs->offset = 7;
2628
2629 v9fs_string_init(&vs->fullname);
2630
2631 pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
2632 &vs->symname, &gid);
2633
2634 vs->dfidp = lookup_fid(s, dfid);
2635 if (vs->dfidp == NULL) {
2636 err = -EINVAL;
2637 goto out;
2638 }
2639
2640 v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
2641 vs->name.data);
2642 err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data,
2643 vs->fullname.data, gid);
2644 v9fs_symlink_post_do_symlink(s, vs, err);
2645 return;
2646
2647out:
2648 complete_pdu(s, vs->pdu, err);
2649 v9fs_string_free(&vs->name);
2650 v9fs_string_free(&vs->symname);
2651 qemu_free(vs);
2652}
2653
9f107513
AL		 2654static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
2655{
9c5e9d89
AL		 2656 /* A nop call with no return */
2657 complete_pdu(s, pdu, 7);
9f107513
AL		 2658}
2659
b2c224be
VJ		 2660static void v9fs_link(V9fsState *s, V9fsPDU *pdu)
2661{
2662 int32_t dfid, oldfid;
2663 V9fsFidState *dfidp, *oldfidp;
2664 V9fsString name, fullname;
2665 size_t offset = 7;
2666 int err = 0;
2667
2668 v9fs_string_init(&fullname);
2669
2670 pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
2671
2672 dfidp = lookup_fid(s, dfid);
2673 if (dfidp == NULL) {
2674 err = -errno;
2675 goto out;
2676 }
2677
2678 oldfidp = lookup_fid(s, oldfid);
2679 if (oldfidp == NULL) {
2680 err = -errno;
2681 goto out;
2682 }
2683
2684 v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
2685 err = offset;
2686 err = v9fs_do_link(s, &oldfidp->path, &fullname);
2687 if (err) {
2688 err = -errno;
2689 }
2690 v9fs_string_free(&fullname);
2691
2692out:
2693 v9fs_string_free(&name);
2694 complete_pdu(s, pdu, err);
2695}
2696
5bae1900
AL		 2697static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs,
2698 int err)
2699{
5bae1900 2700 if (err < 0) {
926487b7
SK		 2701 err = -errno;
2702 } else {
2703 err = vs->offset;
5bae1900
AL		 2704 }
2705
926487b7
SK		 2706 /* For TREMOVE we need to clunk the fid even on failed remove */
2707 free_fid(s, vs->fidp->fid);
2708
5bae1900
AL		 2709 complete_pdu(s, vs->pdu, err);
2710 qemu_free(vs);
2711}
2712
9f107513
AL		 2713static void v9fs_remove(V9fsState *s, V9fsPDU *pdu)
2714{
5bae1900
AL		 2715 int32_t fid;
2716 V9fsRemoveState *vs;
2717 int err = 0;
2718
2719 vs = qemu_malloc(sizeof(*vs));
2720 vs->pdu = pdu;
2721 vs->offset = 7;
2722
2723 pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
2724
2725 vs->fidp = lookup_fid(s, fid);
2726 if (vs->fidp == NULL) {
2727 err = -EINVAL;
2728 goto out;
9f107513 2729 }
5bae1900
AL		 2730
2731 err = v9fs_do_remove(s, &vs->fidp->path);
2732 v9fs_remove_post_remove(s, vs, err);
2733 return;
2734
2735out:
2736 complete_pdu(s, pdu, err);
2737 qemu_free(vs);
9f107513
AL		 2738}
2739
8cf89e00
AL		 2740static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err)
2741{
2742 if (err < 0) {
2743 goto out;
2744 }
2745
2746 err = vs->offset;
2747
2748out:
2749 v9fs_stat_free(&vs->v9stat);
2750 complete_pdu(s, vs->pdu, err);
2751 qemu_free(vs);
2752}
2753
2754static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err)
2755{
2756 if (err < 0) {
2757 goto out;
2758 }
8cf89e00
AL		 2759 if (vs->v9stat.length != -1) {
2760 if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) {
2761 err = -errno;
2762 }
2763 }
2764 v9fs_wstat_post_truncate(s, vs, err);
2765 return;
2766
2767out:
2768 v9fs_stat_free(&vs->v9stat);
2769 complete_pdu(s, vs->pdu, err);
2770 qemu_free(vs);
2771}
2772
c7b4b0b3 2773static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs)
8cf89e00 2774{
c7b4b0b3
MK		 2775 int err = 0;
2776 char *old_name, *new_name;
2777 char *end;
8cf89e00 2778
c7b4b0b3
MK		 2779 if (vs->newdirfid != -1) {
2780 V9fsFidState *dirfidp;
2781 dirfidp = lookup_fid(s, vs->newdirfid);
2782
2783 if (dirfidp == NULL) {
2784 err = -ENOENT;
2785 goto out;
2786 }
2787
d62dbb51 2788 BUG_ON(dirfidp->fid_type != P9_FID_NONE);
8cf89e00 2789
c7b4b0b3
MK		 2790 new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2);
2791
2792 strcpy(new_name, dirfidp->path.data);
2793 strcat(new_name, "/");
2794 strcat(new_name + dirfidp->path.size, vs->name.data);
2795 } else {
8cf89e00
AL		 2796 old_name = vs->fidp->path.data;
2797 end = strrchr(old_name, '/');
2798 if (end) {
2799 end++;
2800 } else {
2801 end = old_name;
2802 }
c7b4b0b3 2803 new_name = qemu_mallocz(end - old_name + vs->name.size + 1);
8cf89e00 2804
c7b4b0b3
MK		 2805 strncat(new_name, old_name, end - old_name);
2806 strncat(new_name + (end - old_name), vs->name.data, vs->name.size);
2807 }
8cf89e00 2808
c7b4b0b3
MK		 2809 v9fs_string_free(&vs->name);
2810 vs->name.data = qemu_strdup(new_name);
2811 vs->name.size = strlen(new_name);
8cf89e00 2812
c7b4b0b3
MK		 2813 if (strcmp(new_name, vs->fidp->path.data) != 0) {
2814 if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) {
2815 err = -errno;
2816 } else {
2817 V9fsFidState *fidp;
2818 /*
2819 * Fixup fid's pointing to the old name to
2820 * start pointing to the new name
2821 */
2822 for (fidp = s->fid_list; fidp; fidp = fidp->next) {
2823 if (vs->fidp == fidp) {
2824 /*
2825 * we replace name of this fid towards the end
2826 * so that our below strcmp will work
2827 */
2828 continue;
2829 }
2830 if (!strncmp(vs->fidp->path.data, fidp->path.data,
2831 strlen(vs->fidp->path.data))) {
2832 /* replace the name */
2833 v9fs_fix_path(&fidp->path, &vs->name,
2834 strlen(vs->fidp->path.data));
8cf89e00 2835 }
8cf89e00 2836 }
c7b4b0b3 2837 v9fs_string_copy(&vs->fidp->path, &vs->name);
8cf89e00
AL		 2838 }
2839 }
c7b4b0b3
MK		 2840out:
2841 v9fs_string_free(&vs->name);
2842 return err;
2843}
2844
2845static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err)
2846{
2847 complete_pdu(s, vs->pdu, err);
2848 qemu_free(vs);
2849}
2850
2851static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err)
2852{
2853 if (err < 0) {
2854 goto out;
2855 }
2856
2857 if (vs->v9stat.name.size != 0) {
2858 V9fsRenameState *vr;
2859
783f04e1 2860 vr = qemu_mallocz(sizeof(V9fsRenameState));
c7b4b0b3
MK		 2861 vr->newdirfid = -1;
2862 vr->pdu = vs->pdu;
2863 vr->fidp = vs->fidp;
2864 vr->offset = vs->offset;
2865 vr->name.size = vs->v9stat.name.size;
2866 vr->name.data = qemu_strdup(vs->v9stat.name.data);
2867
2868 err = v9fs_complete_rename(s, vr);
2869 qemu_free(vr);
2870 }
8cf89e00
AL		 2871 v9fs_wstat_post_rename(s, vs, err);
2872 return;
2873
2874out:
2875 v9fs_stat_free(&vs->v9stat);
2876 complete_pdu(s, vs->pdu, err);
2877 qemu_free(vs);
2878}
2879
c7b4b0b3
MK		 2880static void v9fs_rename(V9fsState *s, V9fsPDU *pdu)
2881{
2882 int32_t fid;
2883 V9fsRenameState *vs;
2884 ssize_t err = 0;
2885
2886 vs = qemu_malloc(sizeof(*vs));
2887 vs->pdu = pdu;
2888 vs->offset = 7;
2889
2890 pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name);
2891
2892 vs->fidp = lookup_fid(s, fid);
2893 if (vs->fidp == NULL) {
2894 err = -ENOENT;
2895 goto out;
2896 }
2897
d62dbb51 2898 BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
c7b4b0b3
MK		 2899
2900 err = v9fs_complete_rename(s, vs);
2901 v9fs_rename_post_rename(s, vs, err);
2902 return;
2903out:
2904 complete_pdu(s, vs->pdu, err);
2905 qemu_free(vs);
2906}
2907
8cf89e00
AL		 2908static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err)
2909{
2910 if (err < 0) {
2911 goto out;
2912 }
2913
f7613bee 2914 if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) {
8cf89e00
AL		 2915 if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
2916 vs->v9stat.n_gid)) {
2917 err = -errno;
2918 }
2919 }
2920 v9fs_wstat_post_chown(s, vs, err);
2921 return;
2922
2923out:
2924 v9fs_stat_free(&vs->v9stat);
2925 complete_pdu(s, vs->pdu, err);
2926 qemu_free(vs);
2927}
2928
2929static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err)
2930{
2931 if (err < 0) {
2932 goto out;
2933 }
2934
74bc02b2 2935 if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) {
8fc39ae4
SK		 2936 struct timespec times[2];
2937 if (vs->v9stat.atime != -1) {
2938 times[0].tv_sec = vs->v9stat.atime;
2939 times[0].tv_nsec = 0;
2940 } else {
2941 times[0].tv_nsec = UTIME_OMIT;
2942 }
2943 if (vs->v9stat.mtime != -1) {
2944 times[1].tv_sec = vs->v9stat.mtime;
2945 times[1].tv_nsec = 0;
2946 } else {
2947 times[1].tv_nsec = UTIME_OMIT;
2948 }
2949
2950 if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
8cf89e00
AL		 2951 err = -errno;
2952 }
2953 }
2954
2955 v9fs_wstat_post_utime(s, vs, err);
2956 return;
2957
2958out:
2959 v9fs_stat_free(&vs->v9stat);
2960 complete_pdu(s, vs->pdu, err);
2961 qemu_free(vs);
2962}
2963
2964static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err)
2965{
2966 if (err == -1) {
2967 err = -errno;
2968 }
2969 v9fs_stat_free(&vs->v9stat);
2970 complete_pdu(s, vs->pdu, err);
2971 qemu_free(vs);
2972}
2973
2974static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err)
2975{
2976 uint32_t v9_mode;
2977
2978 if (err == -1) {
2979 err = -errno;
2980 goto out;
2981 }
2982
2983 v9_mode = stat_to_v9mode(&vs->stbuf);
2984
2985 if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
2986 (v9_mode & P9_STAT_MODE_TYPE_BITS)) {
2987 /* Attempting to change the type */
2988 err = -EIO;
2989 goto out;
2990 }
2991
2992 if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
2993 &vs->v9stat.extension))) {
2994 err = -errno;
2995 }
2996 v9fs_wstat_post_chmod(s, vs, err);
2997 return;
2998
2999out:
3000 v9fs_stat_free(&vs->v9stat);
3001 complete_pdu(s, vs->pdu, err);
3002 qemu_free(vs);
3003}
3004
9f107513
AL		 3005static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu)
3006{
8cf89e00
AL		 3007 int32_t fid;
3008 V9fsWstatState *vs;
3009 int err = 0;
3010
3011 vs = qemu_malloc(sizeof(*vs));
3012 vs->pdu = pdu;
3013 vs->offset = 7;
3014
3015 pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
3016
3017 vs->fidp = lookup_fid(s, fid);
3018 if (vs->fidp == NULL) {
3019 err = -EINVAL;
3020 goto out;
9f107513 3021 }
8cf89e00
AL		 3022
3023 /* do we need to sync the file? */
3024 if (donttouch_stat(&vs->v9stat)) {
d62dbb51 3025 err = v9fs_do_fsync(s, vs->fidp->fs.fd);
8cf89e00
AL		 3026 v9fs_wstat_post_fsync(s, vs, err);
3027 return;
3028 }
3029
3030 if (vs->v9stat.mode != -1) {
3031 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
3032 v9fs_wstat_post_lstat(s, vs, err);
3033 return;
3034 }
3035
3036 v9fs_wstat_post_chmod(s, vs, err);
3037 return;
3038
3039out:
3040 v9fs_stat_free(&vs->v9stat);
3041 complete_pdu(s, vs->pdu, err);
3042 qemu_free(vs);
9f107513
AL		 3043}
3044
be940c87
MK		 3045static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err)
3046{
5e94c103
MK		 3047 int32_t bsize_factor;
3048
be940c87
MK		 3049 if (err) {
3050 err = -errno;
3051 goto out;
3052 }
3053
5e94c103
MK		 3054 /*
3055 * compute bsize factor based on host file system block size
3056 * and client msize
3057 */
3058 bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize;
3059 if (!bsize_factor) {
3060 bsize_factor = 1;
3061 }
be940c87
MK		 3062 vs->v9statfs.f_type = vs->stbuf.f_type;
3063 vs->v9statfs.f_bsize = vs->stbuf.f_bsize;
5e94c103
MK		 3064 vs->v9statfs.f_bsize *= bsize_factor;
3065 /*
3066 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
3067 * adjust(divide) the number of blocks, free blocks and available
3068 * blocks by bsize factor
3069 */
3070 vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor;
3071 vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor;
3072 vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor;
be940c87
MK		 3073 vs->v9statfs.f_files = vs->stbuf.f_files;
3074 vs->v9statfs.f_ffree = vs->stbuf.f_ffree;
3075 vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] |
3076 (unsigned long long)vs->stbuf.f_fsid.__val[1] << 32;
3077 vs->v9statfs.f_namelen = vs->stbuf.f_namelen;
3078
3079 vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
3080 vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks,
3081 vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files,
3082 vs->v9statfs.f_ffree, vs->v9statfs.fsid_val,
3083 vs->v9statfs.f_namelen);
3084
3085out:
3086 complete_pdu(s, vs->pdu, vs->offset);
3087 qemu_free(vs);
3088}
3089
3090static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu)
3091{
3092 V9fsStatfsState *vs;
3093 ssize_t err = 0;
3094
3095 vs = qemu_malloc(sizeof(*vs));
3096 vs->pdu = pdu;
3097 vs->offset = 7;
3098
3099 memset(&vs->v9statfs, 0, sizeof(vs->v9statfs));
3100
3101 pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
3102
3103 vs->fidp = lookup_fid(s, vs->fid);
3104 if (vs->fidp == NULL) {
3105 err = -ENOENT;
3106 goto out;
3107 }
3108
3109 err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf);
3110 v9fs_statfs_post_statfs(s, vs, err);
3111 return;
3112
3113out:
3114 complete_pdu(s, vs->pdu, err);
3115 qemu_free(vs);
3116}
3117
5268cecc
MK		 3118static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err)
3119{
3120 if (err == -1) {
3121 err = -errno;
3122 goto out;
3123 }
3124
3125 stat_to_qid(&vs->stbuf, &vs->qid);
3126 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
3127 err = vs->offset;
3128out:
3129 complete_pdu(s, vs->pdu, err);
3130 v9fs_string_free(&vs->fullname);
3131 v9fs_string_free(&vs->name);
3132 qemu_free(vs);
3133}
3134
3135static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err)
3136{
3137 if (err == -1) {
3138 err = -errno;
3139 goto out;
3140 }
3141
3142 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
3143 v9fs_mknod_post_lstat(s, vs, err);
3144 return;
3145out:
3146 complete_pdu(s, vs->pdu, err);
3147 v9fs_string_free(&vs->fullname);
3148 v9fs_string_free(&vs->name);
3149 qemu_free(vs);
3150}
3151
3152static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu)
3153{
3154 int32_t fid;
3155 V9fsMkState *vs;
3156 int err = 0;
3157 V9fsFidState *fidp;
3158 gid_t gid;
3159 int mode;
3160 int major, minor;
3161
3162 vs = qemu_malloc(sizeof(*vs));
3163 vs->pdu = pdu;
3164 vs->offset = 7;
3165
3166 v9fs_string_init(&vs->fullname);
3167 pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode,
3168 &major, &minor, &gid);
3169
3170 fidp = lookup_fid(s, fid);
3171 if (fidp == NULL) {
3172 err = -ENOENT;
3173 goto out;
3174 }
3175
3176 v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
3177 err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor),
3178 fidp->uid, gid);
3179 v9fs_mknod_post_mknod(s, vs, err);
3180 return;
3181
3182out:
3183 complete_pdu(s, vs->pdu, err);
3184 v9fs_string_free(&vs->fullname);
3185 v9fs_string_free(&vs->name);
3186 qemu_free(vs);
3187}
3188
82cc3ee8
MK		 3189/*
3190 * Implement posix byte range locking code
3191 * Server side handling of locking code is very simple, because 9p server in
3192 * QEMU can handle only one client. And most of the lock handling
3193 * (like conflict, merging) etc is done by the VFS layer itself, so no need to
3194 * do any thing in * qemu 9p server side lock code path.
3195 * So when a TLOCK request comes, always return success
3196 */
3197
3198static void v9fs_lock(V9fsState *s, V9fsPDU *pdu)
3199{
3200 int32_t fid, err = 0;
3201 V9fsLockState *vs;
3202
3203 vs = qemu_mallocz(sizeof(*vs));
3204 vs->pdu = pdu;
3205 vs->offset = 7;
3206
3207 vs->flock = qemu_malloc(sizeof(*vs->flock));
3208 pdu_unmarshal(vs->pdu, vs->offset, "dbdqqds", &fid, &vs->flock->type,
3209 &vs->flock->flags, &vs->flock->start, &vs->flock->length,
3210 &vs->flock->proc_id, &vs->flock->client_id);
3211
3212 vs->status = P9_LOCK_ERROR;
3213
3214 /* We support only block flag now (that too ignored currently) */
3215 if (vs->flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
3216 err = -EINVAL;
3217 goto out;
3218 }
3219 vs->fidp = lookup_fid(s, fid);
3220 if (vs->fidp == NULL) {
3221 err = -ENOENT;
3222 goto out;
3223 }
3224
3225 err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
3226 if (err < 0) {
3227 err = -errno;
3228 goto out;
3229 }
3230 vs->status = P9_LOCK_SUCCESS;
3231out:
3232 vs->offset += pdu_marshal(vs->pdu, vs->offset, "b", vs->status);
3233 complete_pdu(s, vs->pdu, err);
3234 qemu_free(vs->flock);
3235 qemu_free(vs);
3236}
3237
8f354003
MK		 3238/*
3239 * When a TGETLOCK request comes, always return success because all lock
3240 * handling is done by client's VFS layer.
3241 */
3242
3243static void v9fs_getlock(V9fsState *s, V9fsPDU *pdu)
3244{
3245 int32_t fid, err = 0;
3246 V9fsGetlockState *vs;
3247
3248 vs = qemu_mallocz(sizeof(*vs));
3249 vs->pdu = pdu;
3250 vs->offset = 7;
3251
3252 vs->glock = qemu_malloc(sizeof(*vs->glock));
3253 pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type,
3254 &vs->glock->start, &vs->glock->length, &vs->glock->proc_id,
3255 &vs->glock->client_id);
3256
3257 vs->fidp = lookup_fid(s, fid);
3258 if (vs->fidp == NULL) {
3259 err = -ENOENT;
3260 goto out;
3261 }
3262
3263 err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
3264 if (err < 0) {
3265 err = -errno;
3266 goto out;
3267 }
3268 vs->glock->type = F_UNLCK;
3269 vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type,
3270 vs->glock->start, vs->glock->length, vs->glock->proc_id,
3271 &vs->glock->client_id);
3272out:
3273 complete_pdu(s, vs->pdu, err);
3274 qemu_free(vs->glock);
3275 qemu_free(vs);
3276}
3277
b67592ea
MK		 3278static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err)
3279{
3280 if (err == -1) {
3281 err = -errno;
3282 goto out;
3283 }
3284
3285 stat_to_qid(&vs->stbuf, &vs->qid);
3286 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
3287 err = vs->offset;
3288out:
3289 complete_pdu(s, vs->pdu, err);
3290 v9fs_string_free(&vs->fullname);
3291 v9fs_string_free(&vs->name);
3292 qemu_free(vs);
3293}
3294
3295static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err)
3296{
3297 if (err == -1) {
3298 err = -errno;
3299 goto out;
3300 }
3301
3302 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
3303 v9fs_mkdir_post_lstat(s, vs, err);
3304 return;
3305out:
3306 complete_pdu(s, vs->pdu, err);
3307 v9fs_string_free(&vs->fullname);
3308 v9fs_string_free(&vs->name);
3309 qemu_free(vs);
3310}
3311
3312static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu)
3313{
3314 int32_t fid;
3315 V9fsMkState *vs;
3316 int err = 0;
3317 V9fsFidState *fidp;
3318 gid_t gid;
3319 int mode;
3320
3321 vs = qemu_malloc(sizeof(*vs));
3322 vs->pdu = pdu;
3323 vs->offset = 7;
3324
3325 v9fs_string_init(&vs->fullname);
3326 pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode,
3327 &gid);
3328
3329 fidp = lookup_fid(s, fid);
3330 if (fidp == NULL) {
3331 err = -ENOENT;
3332 goto out;
3333 }
3334
3335 v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
3336 err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid);
3337 v9fs_mkdir_post_mkdir(s, vs, err);
3338 return;
3339
3340out:
3341 complete_pdu(s, vs->pdu, err);
3342 v9fs_string_free(&vs->fullname);
3343 v9fs_string_free(&vs->name);
3344 qemu_free(vs);
3345}
3346
fa32ef88
AK		 3347static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err)
3348{
3349
3350 if (err < 0) {
3351 err = -errno;
3352 free_fid(s, vs->xattr_fidp->fid);
3353 goto out;
3354 }
3355 vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
3356 err = vs->offset;
3357out:
3358 complete_pdu(s, vs->pdu, err);
3359 v9fs_string_free(&vs->name);
3360 qemu_free(vs);
3361 return;
3362}
3363
3364static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err)
3365{
3366 if (err < 0) {
3367 err = -errno;
3368 free_fid(s, vs->xattr_fidp->fid);
3369 goto out;
3370 }
3371 /*
3372 * Read the xattr value
3373 */
3374 vs->xattr_fidp->fs.xattr.len = vs->size;
3375 vs->xattr_fidp->fid_type = P9_FID_XATTR;
3376 vs->xattr_fidp->fs.xattr.copied_len = -1;
3377 if (vs->size) {
3378 vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
3379 err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
3380 &vs->name, vs->xattr_fidp->fs.xattr.value,
3381 vs->xattr_fidp->fs.xattr.len);
3382 }
3383 v9fs_post_xattr_getvalue(s, vs, err);
3384 return;
3385out:
3386 complete_pdu(s, vs->pdu, err);
3387 v9fs_string_free(&vs->name);
3388 qemu_free(vs);
3389}
3390
3391static void v9fs_post_lxattr_getvalue(V9fsState *s,
3392 V9fsXattrState *vs, int err)
3393{
3394 if (err < 0) {
3395 err = -errno;
3396 free_fid(s, vs->xattr_fidp->fid);
3397 goto out;
3398 }
3399 vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
3400 err = vs->offset;
3401out:
3402 complete_pdu(s, vs->pdu, err);
3403 v9fs_string_free(&vs->name);
3404 qemu_free(vs);
3405 return;
3406}
3407
3408static void v9fs_post_lxattr_check(V9fsState *s,
3409 V9fsXattrState *vs, ssize_t err)
3410{
3411 if (err < 0) {
3412 err = -errno;
3413 free_fid(s, vs->xattr_fidp->fid);
3414 goto out;
3415 }
3416 /*
3417 * Read the xattr value
3418 */
3419 vs->xattr_fidp->fs.xattr.len = vs->size;
3420 vs->xattr_fidp->fid_type = P9_FID_XATTR;
3421 vs->xattr_fidp->fs.xattr.copied_len = -1;
3422 if (vs->size) {
3423 vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
3424 err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
3425 vs->xattr_fidp->fs.xattr.value,
3426 vs->xattr_fidp->fs.xattr.len);
3427 }
3428 v9fs_post_lxattr_getvalue(s, vs, err);
3429 return;
3430out:
3431 complete_pdu(s, vs->pdu, err);
3432 v9fs_string_free(&vs->name);
3433 qemu_free(vs);
3434}
3435
3436static void v9fs_xattrwalk(V9fsState *s, V9fsPDU *pdu)
3437{
3438 ssize_t err = 0;
3439 V9fsXattrState *vs;
3440 int32_t fid, newfid;
3441
3442 vs = qemu_malloc(sizeof(*vs));
3443 vs->pdu = pdu;
3444 vs->offset = 7;
3445
3446 pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name);
3447 vs->file_fidp = lookup_fid(s, fid);
3448 if (vs->file_fidp == NULL) {
3449 err = -ENOENT;
3450 goto out;
3451 }
3452
3453 vs->xattr_fidp = alloc_fid(s, newfid);
3454 if (vs->xattr_fidp == NULL) {
3455 err = -EINVAL;
3456 goto out;
3457 }
3458
3459 v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path);
3460 if (vs->name.data[0] == 0) {
3461 /*
3462 * listxattr request. Get the size first
3463 */
3464 vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
3465 NULL, 0);
3466 if (vs->size < 0) {
3467 err = vs->size;
3468 }
3469 v9fs_post_lxattr_check(s, vs, err);
3470 return;
3471 } else {
3472 /*
3473 * specific xattr fid. We check for xattr
3474 * presence also collect the xattr size
3475 */
3476 vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
3477 &vs->name, NULL, 0);
3478 if (vs->size < 0) {
3479 err = vs->size;
3480 }
3481 v9fs_post_xattr_check(s, vs, err);
3482 return;
3483 }
3484out:
3485 complete_pdu(s, vs->pdu, err);
3486 v9fs_string_free(&vs->name);
3487 qemu_free(vs);
3488}
3489
10b468bd
AK		 3490static void v9fs_xattrcreate(V9fsState *s, V9fsPDU *pdu)
3491{
3492 int flags;
3493 int32_t fid;
3494 ssize_t err = 0;
3495 V9fsXattrState *vs;
3496
3497 vs = qemu_malloc(sizeof(*vs));
3498 vs->pdu = pdu;
3499 vs->offset = 7;
3500
3501 pdu_unmarshal(vs->pdu, vs->offset, "dsqd",
3502 &fid, &vs->name, &vs->size, &flags);
3503
3504 vs->file_fidp = lookup_fid(s, fid);
3505 if (vs->file_fidp == NULL) {
3506 err = -EINVAL;
3507 goto out;
3508 }
3509
3510 /* Make the file fid point to xattr */
3511 vs->xattr_fidp = vs->file_fidp;
3512 vs->xattr_fidp->fid_type = P9_FID_XATTR;
3513 vs->xattr_fidp->fs.xattr.copied_len = 0;
3514 vs->xattr_fidp->fs.xattr.len = vs->size;
3515 vs->xattr_fidp->fs.xattr.flags = flags;
3516 v9fs_string_init(&vs->xattr_fidp->fs.xattr.name);
3517 v9fs_string_copy(&vs->xattr_fidp->fs.xattr.name, &vs->name);
9ed3ef26
AK		 3518 if (vs->size)
3519 vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
3520 else
3521 vs->xattr_fidp->fs.xattr.value = NULL;
10b468bd
AK		 3522
3523out:
3524 complete_pdu(s, vs->pdu, err);
3525 v9fs_string_free(&vs->name);
3526 qemu_free(vs);
3527}
fa32ef88 3528
df0973a4
MK		 3529static void v9fs_readlink_post_readlink(V9fsState *s, V9fsReadLinkState *vs,
3530 int err)
3531{
3532 if (err < 0) {
3533 err = -errno;
3534 goto out;
3535 }
3536 vs->offset += pdu_marshal(vs->pdu, vs->offset, "s", &vs->target);
3537 err = vs->offset;
3538out:
3539 complete_pdu(s, vs->pdu, err);
3540 v9fs_string_free(&vs->target);
3541 qemu_free(vs);
3542}
3543
3544static void v9fs_readlink(V9fsState *s, V9fsPDU *pdu)
3545{
3546 int32_t fid;
3547 V9fsReadLinkState *vs;
3548 int err = 0;
3549 V9fsFidState *fidp;
3550
3551 vs = qemu_malloc(sizeof(*vs));
3552 vs->pdu = pdu;
3553 vs->offset = 7;
3554
3555 pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
3556
3557 fidp = lookup_fid(s, fid);
3558 if (fidp == NULL) {
3559 err = -ENOENT;
3560 goto out;
3561 }
3562
3563 v9fs_string_init(&vs->target);
3564 err = v9fs_do_readlink(s, &fidp->path, &vs->target);
3565 v9fs_readlink_post_readlink(s, vs, err);
3566 return;
3567out:
3568 complete_pdu(s, vs->pdu, err);
3569 qemu_free(vs);
3570}
3571
9f107513
AL		 3572typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu);
3573
3574static pdu_handler_t *pdu_handlers[] = {
c18e2f94 3575 [P9_TREADDIR] = v9fs_readdir,
be940c87 3576 [P9_TSTATFS] = v9fs_statfs,
00ede4c2 3577 [P9_TGETATTR] = v9fs_getattr,
c79ce737 3578 [P9_TSETATTR] = v9fs_setattr,
fa32ef88 3579 [P9_TXATTRWALK] = v9fs_xattrwalk,
10b468bd 3580 [P9_TXATTRCREATE] = v9fs_xattrcreate,
5268cecc 3581 [P9_TMKNOD] = v9fs_mknod,
c7b4b0b3 3582 [P9_TRENAME] = v9fs_rename,
82cc3ee8 3583 [P9_TLOCK] = v9fs_lock,
8f354003 3584 [P9_TGETLOCK] = v9fs_getlock,
df0973a4 3585 [P9_TREADLINK] = v9fs_readlink,
b67592ea 3586 [P9_TMKDIR] = v9fs_mkdir,
9f107513 3587 [P9_TVERSION] = v9fs_version,
771e9d4c 3588 [P9_TLOPEN] = v9fs_open,
9f107513
AL		 3589 [P9_TATTACH] = v9fs_attach,
3590 [P9_TSTAT] = v9fs_stat,
3591 [P9_TWALK] = v9fs_walk,
3592 [P9_TCLUNK] = v9fs_clunk,
b41e95d3 3593 [P9_TFSYNC] = v9fs_fsync,
9f107513
AL		 3594 [P9_TOPEN] = v9fs_open,
3595 [P9_TREAD] = v9fs_read,
3596#if 0
3597 [P9_TAUTH] = v9fs_auth,
3598#endif
3599 [P9_TFLUSH] = v9fs_flush,
b2c224be 3600 [P9_TLINK] = v9fs_link,
08c60fc9 3601 [P9_TSYMLINK] = v9fs_symlink,
9f107513 3602 [P9_TCREATE] = v9fs_create,
c1568af5 3603 [P9_TLCREATE] = v9fs_lcreate,
9f107513
AL		 3604 [P9_TWRITE] = v9fs_write,
3605 [P9_TWSTAT] = v9fs_wstat,
3606 [P9_TREMOVE] = v9fs_remove,
3607};
3608
3609static void submit_pdu(V9fsState *s, V9fsPDU *pdu)
3610{
3611 pdu_handler_t *handler;
3612
3613 if (debug_9p_pdu) {
3614 pprint_pdu(pdu);
3615 }
3616
3617 BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers));
3618
3619 handler = pdu_handlers[pdu->id];
3620 BUG_ON(handler == NULL);
3621
3622 handler(s, pdu);
3623}
3624
3625static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
3626{
3627 V9fsState *s = (V9fsState *)vdev;
3628 V9fsPDU *pdu;
3629 ssize_t len;
3630
3631 while ((pdu = alloc_pdu(s)) &&
3632 (len = virtqueue_pop(vq, &pdu->elem)) != 0) {
3633 uint8_t *ptr;
3634
3635 BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
3636 BUG_ON(pdu->elem.out_sg[0].iov_len < 7);
3637
3638 ptr = pdu->elem.out_sg[0].iov_base;
3639
3640 memcpy(&pdu->size, ptr, 4);
3641 pdu->id = ptr[4];
3642 memcpy(&pdu->tag, ptr + 5, 2);
3643
3644 submit_pdu(s, pdu);
3645 }
3646
3647 free_pdu(s, pdu);
3648}
3649
3650static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
3651{
3652 features |= 1 << VIRTIO_9P_MOUNT_TAG;
3653 return features;
3654}
3655
3656static V9fsState *to_virtio_9p(VirtIODevice *vdev)
3657{
3658 return (V9fsState *)vdev;
3659}
3660
3661static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
3662{
3663 struct virtio_9p_config *cfg;
3664 V9fsState *s = to_virtio_9p(vdev);
3665
3666 cfg = qemu_mallocz(sizeof(struct virtio_9p_config) +
3667 s->tag_len);
3668 stw_raw(&cfg->tag_len, s->tag_len);
3669 memcpy(cfg->tag, s->tag, s->tag_len);
3670 memcpy(config, cfg, s->config_size);
3671 qemu_free(cfg);
3672}
3673
3674VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
3675 {
3676 V9fsState *s;
3677 int i, len;
3678 struct stat stat;
3679 FsTypeEntry *fse;
3680
3681
3682 s = (V9fsState *)virtio_common_init("virtio-9p",
3683 VIRTIO_ID_9P,
3684 sizeof(struct virtio_9p_config)+
3685 MAX_TAG_LEN,
3686 sizeof(V9fsState));
3687
3688 /* initialize pdu allocator */
3689 QLIST_INIT(&s->free_list);
3690 for (i = 0; i < (MAX_REQ - 1); i++) {
3691 QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
3692 }
3693
3694 s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
3695
3696 fse = get_fsdev_fsentry(conf->fsdev_id);
3697
3698 if (!fse) {
3699 /* We don't have a fsdev identified by fsdev_id */
9f506893
HPB		 3700 fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
3701 "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
9f107513
AL		 3702 exit(1);
3703 }
3704
3705 if (!fse->path || !conf->tag) {
3706 /* we haven't specified a mount_tag or the path */
3707 fprintf(stderr, "fsdev with id %s needs path "
3708 "and Virtio-9p device needs mount_tag arguments\n",
3709 conf->fsdev_id);
3710 exit(1);
3711 }
3712
758e8e38
VJ		 3713 if (!strcmp(fse->security_model, "passthrough")) {
3714 /* Files on the Fileserver set to client user credentials */
3715 s->ctx.fs_sm = SM_PASSTHROUGH;
fc22118d 3716 s->ctx.xops = passthrough_xattr_ops;
758e8e38
VJ		 3717 } else if (!strcmp(fse->security_model, "mapped")) {
3718 /* Files on the fileserver are set to QEMU credentials.
3719 * Client user credentials are saved in extended attributes.
3720 */
3721 s->ctx.fs_sm = SM_MAPPED;
fc22118d 3722 s->ctx.xops = mapped_xattr_ops;
12848bfc
AK		 3723 } else if (!strcmp(fse->security_model, "none")) {
3724 /*
3725 * Files on the fileserver are set to QEMU credentials.
3726 */
3727 s->ctx.fs_sm = SM_NONE;
fc22118d 3728 s->ctx.xops = none_xattr_ops;
758e8e38 3729 } else {
12848bfc
AK		 3730 fprintf(stderr, "Default to security_model=none. You may want"
3731 " enable advanced security model using "
9ce56db6
VJ		 3732 "security option:\n\t security_model=passthrough \n\t "
3733 "security_model=mapped\n");
12848bfc 3734 s->ctx.fs_sm = SM_NONE;
fc22118d 3735 s->ctx.xops = none_xattr_ops;
9ce56db6
VJ		 3736 }
3737
9f107513
AL		 3738 if (lstat(fse->path, &stat)) {
3739 fprintf(stderr, "share path %s does not exist\n", fse->path);
3740 exit(1);
3741 } else if (!S_ISDIR(stat.st_mode)) {
3742 fprintf(stderr, "share path %s is not a directory \n", fse->path);
3743 exit(1);
3744 }
3745
3746 s->ctx.fs_root = qemu_strdup(fse->path);
3747 len = strlen(conf->tag);
3748 if (len > MAX_TAG_LEN) {
3749 len = MAX_TAG_LEN;
3750 }
3751 /* s->tag is non-NULL terminated string */
3752 s->tag = qemu_malloc(len);
3753 memcpy(s->tag, conf->tag, len);
3754 s->tag_len = len;
3755 s->ctx.uid = -1;
3756
3757 s->ops = fse->ops;
3758 s->vdev.get_features = virtio_9p_get_features;
3759 s->config_size = sizeof(struct virtio_9p_config) +
3760 s->tag_len;
3761 s->vdev.get_config = virtio_9p_get_config;
3762
3763 return &s->vdev;
3764}
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