root / hw / virtio-9p.c @ 00ec5c37
History | View | Annotate | Download (55.6 kB)
1 |
/*
|
---|---|
2 |
* Virtio 9p backend
|
3 |
*
|
4 |
* Copyright IBM, Corp. 2010
|
5 |
*
|
6 |
* Authors:
|
7 |
* Anthony Liguori <aliguori@us.ibm.com>
|
8 |
*
|
9 |
* This work is licensed under the terms of the GNU GPL, version 2. See
|
10 |
* the COPYING file in the top-level directory.
|
11 |
*
|
12 |
*/
|
13 |
|
14 |
#include "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" |
20 |
|
21 |
int dotu = 1; |
22 |
int debug_9p_pdu;
|
23 |
|
24 |
enum {
|
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 |
|
36 |
static 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 |
|
70 |
void cred_init(FsCred *credp)
|
71 |
{ |
72 |
credp->fc_uid = -1;
|
73 |
credp->fc_gid = -1;
|
74 |
credp->fc_mode = -1;
|
75 |
credp->fc_rdev = -1;
|
76 |
} |
77 |
|
78 |
static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
79 |
{ |
80 |
return s->ops->lstat(&s->ctx, path->data, stbuf);
|
81 |
} |
82 |
|
83 |
static 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 |
|
98 |
static int v9fs_do_close(V9fsState *s, int fd) |
99 |
{ |
100 |
return s->ops->close(&s->ctx, fd);
|
101 |
} |
102 |
|
103 |
static int v9fs_do_closedir(V9fsState *s, DIR *dir) |
104 |
{ |
105 |
return s->ops->closedir(&s->ctx, dir);
|
106 |
} |
107 |
|
108 |
static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
109 |
{ |
110 |
return s->ops->open(&s->ctx, path->data, flags);
|
111 |
} |
112 |
|
113 |
static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path)
|
114 |
{ |
115 |
return s->ops->opendir(&s->ctx, path->data);
|
116 |
} |
117 |
|
118 |
static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
119 |
{ |
120 |
return s->ops->rewinddir(&s->ctx, dir);
|
121 |
} |
122 |
|
123 |
static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
|
124 |
{ |
125 |
return s->ops->telldir(&s->ctx, dir);
|
126 |
} |
127 |
|
128 |
static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir) |
129 |
{ |
130 |
return s->ops->readdir(&s->ctx, dir);
|
131 |
} |
132 |
|
133 |
static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
134 |
{ |
135 |
return s->ops->seekdir(&s->ctx, dir, off);
|
136 |
} |
137 |
|
138 |
static 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 |
|
144 |
static 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 |
|
149 |
static 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 |
|
155 |
static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
156 |
{ |
157 |
FsCred cred; |
158 |
cred_init(&cred); |
159 |
cred.fc_mode = mode; |
160 |
return s->ops->chmod(&s->ctx, path->data, &cred);
|
161 |
} |
162 |
|
163 |
static int v9fs_do_mknod(V9fsState *s, V9fsString *path, mode_t mode, dev_t dev) |
164 |
{ |
165 |
return s->ops->mknod(&s->ctx, path->data, mode, dev);
|
166 |
} |
167 |
|
168 |
static int v9fs_do_mksock(V9fsState *s, V9fsString *path) |
169 |
{ |
170 |
return s->ops->mksock(&s->ctx, path->data);
|
171 |
} |
172 |
|
173 |
static int v9fs_do_mkdir(V9fsState *s, V9fsCreateState *vs) |
174 |
{ |
175 |
FsCred cred; |
176 |
|
177 |
cred_init(&cred); |
178 |
cred.fc_uid = vs->fidp->uid; |
179 |
cred.fc_mode = vs->perm & 0777;
|
180 |
|
181 |
return s->ops->mkdir(&s->ctx, vs->fullname.data, &cred);
|
182 |
} |
183 |
|
184 |
static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) |
185 |
{ |
186 |
return s->ops->fstat(&s->ctx, fd, stbuf);
|
187 |
} |
188 |
|
189 |
static int v9fs_do_open2(V9fsState *s, V9fsCreateState *vs) |
190 |
{ |
191 |
FsCred cred; |
192 |
int flags;
|
193 |
|
194 |
cred_init(&cred); |
195 |
cred.fc_uid = vs->fidp->uid; |
196 |
cred.fc_mode = vs->perm & 0777;
|
197 |
flags = omode_to_uflags(vs->mode) | O_CREAT; |
198 |
|
199 |
return s->ops->open2(&s->ctx, vs->fullname.data, flags, &cred);
|
200 |
} |
201 |
|
202 |
static int v9fs_do_symlink(V9fsState *s, V9fsString *oldpath, |
203 |
V9fsString *newpath) |
204 |
{ |
205 |
return s->ops->symlink(&s->ctx, oldpath->data, newpath->data);
|
206 |
} |
207 |
|
208 |
static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) |
209 |
{ |
210 |
return s->ops->link(&s->ctx, oldpath->data, newpath->data);
|
211 |
} |
212 |
|
213 |
static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
214 |
{ |
215 |
return s->ops->truncate(&s->ctx, path->data, size);
|
216 |
} |
217 |
|
218 |
static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, |
219 |
V9fsString *newpath) |
220 |
{ |
221 |
return s->ops->rename(&s->ctx, oldpath->data, newpath->data);
|
222 |
} |
223 |
|
224 |
static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) |
225 |
{ |
226 |
FsCred cred; |
227 |
cred_init(&cred); |
228 |
cred.fc_uid = uid; |
229 |
cred.fc_gid = gid; |
230 |
|
231 |
return s->ops->chown(&s->ctx, path->data, &cred);
|
232 |
} |
233 |
|
234 |
static int v9fs_do_utime(V9fsState *s, V9fsString *path, |
235 |
const struct utimbuf *buf) |
236 |
{ |
237 |
return s->ops->utime(&s->ctx, path->data, buf);
|
238 |
} |
239 |
|
240 |
static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
241 |
{ |
242 |
return s->ops->remove(&s->ctx, path->data);
|
243 |
} |
244 |
|
245 |
static int v9fs_do_fsync(V9fsState *s, int fd) |
246 |
{ |
247 |
return s->ops->fsync(&s->ctx, fd);
|
248 |
} |
249 |
|
250 |
static void v9fs_string_init(V9fsString *str) |
251 |
{ |
252 |
str->data = NULL;
|
253 |
str->size = 0;
|
254 |
} |
255 |
|
256 |
static void v9fs_string_free(V9fsString *str) |
257 |
{ |
258 |
qemu_free(str->data); |
259 |
str->data = NULL;
|
260 |
str->size = 0;
|
261 |
} |
262 |
|
263 |
static void v9fs_string_null(V9fsString *str) |
264 |
{ |
265 |
v9fs_string_free(str); |
266 |
} |
267 |
|
268 |
static int number_to_string(void *arg, char type) |
269 |
{ |
270 |
unsigned int ret = 0; |
271 |
|
272 |
switch (type) {
|
273 |
case 'u': { |
274 |
unsigned int num = *(unsigned int *)arg; |
275 |
|
276 |
do {
|
277 |
ret++; |
278 |
num = num/10;
|
279 |
} while (num);
|
280 |
break;
|
281 |
} |
282 |
default:
|
283 |
printf("Number_to_string: Unknown number format\n");
|
284 |
return -1; |
285 |
} |
286 |
|
287 |
return ret;
|
288 |
} |
289 |
|
290 |
static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) |
291 |
{ |
292 |
va_list ap2; |
293 |
char *iter = (char *)fmt; |
294 |
int len = 0; |
295 |
int nr_args = 0; |
296 |
char *arg_char_ptr;
|
297 |
unsigned int arg_uint; |
298 |
|
299 |
/* Find the number of %'s that denotes an argument */
|
300 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
301 |
nr_args++; |
302 |
iter++; |
303 |
} |
304 |
|
305 |
len = strlen(fmt) - 2*nr_args;
|
306 |
|
307 |
if (!nr_args) {
|
308 |
goto alloc_print;
|
309 |
} |
310 |
|
311 |
va_copy(ap2, ap); |
312 |
|
313 |
iter = (char *)fmt;
|
314 |
|
315 |
/* Now parse the format string */
|
316 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
317 |
iter++; |
318 |
switch (*iter) {
|
319 |
case 'u': |
320 |
arg_uint = va_arg(ap2, unsigned int); |
321 |
len += number_to_string((void *)&arg_uint, 'u'); |
322 |
break;
|
323 |
case 's': |
324 |
arg_char_ptr = va_arg(ap2, char *);
|
325 |
len += strlen(arg_char_ptr); |
326 |
break;
|
327 |
case 'c': |
328 |
len += 1;
|
329 |
break;
|
330 |
default:
|
331 |
fprintf(stderr, |
332 |
"v9fs_string_alloc_printf:Incorrect format %c", *iter);
|
333 |
return -1; |
334 |
} |
335 |
iter++; |
336 |
} |
337 |
|
338 |
alloc_print:
|
339 |
*strp = qemu_malloc((len + 1) * sizeof(**strp)); |
340 |
|
341 |
return vsprintf(*strp, fmt, ap);
|
342 |
} |
343 |
|
344 |
static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
345 |
{ |
346 |
va_list ap; |
347 |
int err;
|
348 |
|
349 |
v9fs_string_free(str); |
350 |
|
351 |
va_start(ap, fmt); |
352 |
err = v9fs_string_alloc_printf(&str->data, fmt, ap); |
353 |
BUG_ON(err == -1);
|
354 |
va_end(ap); |
355 |
|
356 |
str->size = err; |
357 |
} |
358 |
|
359 |
static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
360 |
{ |
361 |
v9fs_string_free(lhs); |
362 |
v9fs_string_sprintf(lhs, "%s", rhs->data);
|
363 |
} |
364 |
|
365 |
static size_t v9fs_string_size(V9fsString *str)
|
366 |
{ |
367 |
return str->size;
|
368 |
} |
369 |
|
370 |
static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
|
371 |
{ |
372 |
V9fsFidState *f; |
373 |
|
374 |
for (f = s->fid_list; f; f = f->next) {
|
375 |
if (f->fid == fid) {
|
376 |
return f;
|
377 |
} |
378 |
} |
379 |
|
380 |
return NULL; |
381 |
} |
382 |
|
383 |
static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
384 |
{ |
385 |
V9fsFidState *f; |
386 |
|
387 |
f = lookup_fid(s, fid); |
388 |
if (f) {
|
389 |
return NULL; |
390 |
} |
391 |
|
392 |
f = qemu_mallocz(sizeof(V9fsFidState));
|
393 |
|
394 |
f->fid = fid; |
395 |
f->fd = -1;
|
396 |
f->dir = NULL;
|
397 |
|
398 |
f->next = s->fid_list; |
399 |
s->fid_list = f; |
400 |
|
401 |
return f;
|
402 |
} |
403 |
|
404 |
static int free_fid(V9fsState *s, int32_t fid) |
405 |
{ |
406 |
V9fsFidState **fidpp, *fidp; |
407 |
|
408 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
409 |
if ((*fidpp)->fid == fid) {
|
410 |
break;
|
411 |
} |
412 |
} |
413 |
|
414 |
if (*fidpp == NULL) { |
415 |
return -ENOENT;
|
416 |
} |
417 |
|
418 |
fidp = *fidpp; |
419 |
*fidpp = fidp->next; |
420 |
|
421 |
if (fidp->fd != -1) { |
422 |
v9fs_do_close(s, fidp->fd); |
423 |
} |
424 |
if (fidp->dir) {
|
425 |
v9fs_do_closedir(s, fidp->dir); |
426 |
} |
427 |
v9fs_string_free(&fidp->path); |
428 |
qemu_free(fidp); |
429 |
|
430 |
return 0; |
431 |
} |
432 |
|
433 |
#define P9_QID_TYPE_DIR 0x80 |
434 |
#define P9_QID_TYPE_SYMLINK 0x02 |
435 |
|
436 |
#define P9_STAT_MODE_DIR 0x80000000 |
437 |
#define P9_STAT_MODE_APPEND 0x40000000 |
438 |
#define P9_STAT_MODE_EXCL 0x20000000 |
439 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
440 |
#define P9_STAT_MODE_AUTH 0x08000000 |
441 |
#define P9_STAT_MODE_TMP 0x04000000 |
442 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
443 |
#define P9_STAT_MODE_LINK 0x01000000 |
444 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
445 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
446 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
447 |
#define P9_STAT_MODE_SETUID 0x00080000 |
448 |
#define P9_STAT_MODE_SETGID 0x00040000 |
449 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
450 |
|
451 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
452 |
P9_STAT_MODE_SYMLINK | \ |
453 |
P9_STAT_MODE_LINK | \ |
454 |
P9_STAT_MODE_DEVICE | \ |
455 |
P9_STAT_MODE_NAMED_PIPE | \ |
456 |
P9_STAT_MODE_SOCKET) |
457 |
|
458 |
/* This is the algorithm from ufs in spfs */
|
459 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
460 |
{ |
461 |
size_t size; |
462 |
|
463 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
464 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
465 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
466 |
qidp->type = 0;
|
467 |
if (S_ISDIR(stbuf->st_mode)) {
|
468 |
qidp->type |= P9_QID_TYPE_DIR; |
469 |
} |
470 |
if (S_ISLNK(stbuf->st_mode)) {
|
471 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
472 |
} |
473 |
} |
474 |
|
475 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
476 |
{ |
477 |
struct stat stbuf;
|
478 |
int err;
|
479 |
|
480 |
err = v9fs_do_lstat(s, &fidp->path, &stbuf); |
481 |
if (err) {
|
482 |
return err;
|
483 |
} |
484 |
|
485 |
stat_to_qid(&stbuf, qidp); |
486 |
return 0; |
487 |
} |
488 |
|
489 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
490 |
{ |
491 |
V9fsPDU *pdu = NULL;
|
492 |
|
493 |
if (!QLIST_EMPTY(&s->free_list)) {
|
494 |
pdu = QLIST_FIRST(&s->free_list); |
495 |
QLIST_REMOVE(pdu, next); |
496 |
} |
497 |
return pdu;
|
498 |
} |
499 |
|
500 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
501 |
{ |
502 |
if (pdu) {
|
503 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
504 |
} |
505 |
} |
506 |
|
507 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
508 |
size_t offset, size_t size, int pack)
|
509 |
{ |
510 |
int i = 0; |
511 |
size_t copied = 0;
|
512 |
|
513 |
for (i = 0; size && i < sg_count; i++) { |
514 |
size_t len; |
515 |
if (offset >= sg[i].iov_len) {
|
516 |
/* skip this sg */
|
517 |
offset -= sg[i].iov_len; |
518 |
continue;
|
519 |
} else {
|
520 |
len = MIN(sg[i].iov_len - offset, size); |
521 |
if (pack) {
|
522 |
memcpy(sg[i].iov_base + offset, addr, len); |
523 |
} else {
|
524 |
memcpy(addr, sg[i].iov_base + offset, len); |
525 |
} |
526 |
size -= len; |
527 |
copied += len; |
528 |
addr += len; |
529 |
if (size) {
|
530 |
offset = 0;
|
531 |
continue;
|
532 |
} |
533 |
} |
534 |
} |
535 |
|
536 |
return copied;
|
537 |
} |
538 |
|
539 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
540 |
{ |
541 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
542 |
offset, size, 0);
|
543 |
} |
544 |
|
545 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
546 |
size_t size) |
547 |
{ |
548 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
549 |
offset, size, 1);
|
550 |
} |
551 |
|
552 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
553 |
{ |
554 |
size_t pos = 0;
|
555 |
int i, j;
|
556 |
struct iovec *src_sg;
|
557 |
unsigned int num; |
558 |
|
559 |
if (rx) {
|
560 |
src_sg = pdu->elem.in_sg; |
561 |
num = pdu->elem.in_num; |
562 |
} else {
|
563 |
src_sg = pdu->elem.out_sg; |
564 |
num = pdu->elem.out_num; |
565 |
} |
566 |
|
567 |
j = 0;
|
568 |
for (i = 0; i < num; i++) { |
569 |
if (offset <= pos) {
|
570 |
sg[j].iov_base = src_sg[i].iov_base; |
571 |
sg[j].iov_len = src_sg[i].iov_len; |
572 |
j++; |
573 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
574 |
sg[j].iov_base = src_sg[i].iov_base; |
575 |
sg[j].iov_len = src_sg[i].iov_len; |
576 |
sg[j].iov_base += (offset - pos); |
577 |
sg[j].iov_len -= (offset - pos); |
578 |
j++; |
579 |
} |
580 |
pos += src_sg[i].iov_len; |
581 |
} |
582 |
|
583 |
return j;
|
584 |
} |
585 |
|
586 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
587 |
{ |
588 |
size_t old_offset = offset; |
589 |
va_list ap; |
590 |
int i;
|
591 |
|
592 |
va_start(ap, fmt); |
593 |
for (i = 0; fmt[i]; i++) { |
594 |
switch (fmt[i]) {
|
595 |
case 'b': { |
596 |
uint8_t *valp = va_arg(ap, uint8_t *); |
597 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
598 |
break;
|
599 |
} |
600 |
case 'w': { |
601 |
uint16_t val, *valp; |
602 |
valp = va_arg(ap, uint16_t *); |
603 |
val = le16_to_cpupu(valp); |
604 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
605 |
*valp = val; |
606 |
break;
|
607 |
} |
608 |
case 'd': { |
609 |
uint32_t val, *valp; |
610 |
valp = va_arg(ap, uint32_t *); |
611 |
val = le32_to_cpupu(valp); |
612 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
613 |
*valp = val; |
614 |
break;
|
615 |
} |
616 |
case 'q': { |
617 |
uint64_t val, *valp; |
618 |
valp = va_arg(ap, uint64_t *); |
619 |
val = le64_to_cpup(valp); |
620 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
621 |
*valp = val; |
622 |
break;
|
623 |
} |
624 |
case 'v': { |
625 |
struct iovec *iov = va_arg(ap, struct iovec *); |
626 |
int *iovcnt = va_arg(ap, int *); |
627 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
628 |
break;
|
629 |
} |
630 |
case 's': { |
631 |
V9fsString *str = va_arg(ap, V9fsString *); |
632 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
633 |
/* FIXME: sanity check str->size */
|
634 |
str->data = qemu_malloc(str->size + 1);
|
635 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
636 |
str->data[str->size] = 0;
|
637 |
break;
|
638 |
} |
639 |
case 'Q': { |
640 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
641 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
642 |
&qidp->type, &qidp->version, &qidp->path); |
643 |
break;
|
644 |
} |
645 |
case 'S': { |
646 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
647 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
648 |
&statp->size, &statp->type, &statp->dev, |
649 |
&statp->qid, &statp->mode, &statp->atime, |
650 |
&statp->mtime, &statp->length, |
651 |
&statp->name, &statp->uid, &statp->gid, |
652 |
&statp->muid, &statp->extension, |
653 |
&statp->n_uid, &statp->n_gid, |
654 |
&statp->n_muid); |
655 |
break;
|
656 |
} |
657 |
default:
|
658 |
break;
|
659 |
} |
660 |
} |
661 |
|
662 |
va_end(ap); |
663 |
|
664 |
return offset - old_offset;
|
665 |
} |
666 |
|
667 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
668 |
{ |
669 |
size_t old_offset = offset; |
670 |
va_list ap; |
671 |
int i;
|
672 |
|
673 |
va_start(ap, fmt); |
674 |
for (i = 0; fmt[i]; i++) { |
675 |
switch (fmt[i]) {
|
676 |
case 'b': { |
677 |
uint8_t val = va_arg(ap, int);
|
678 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
679 |
break;
|
680 |
} |
681 |
case 'w': { |
682 |
uint16_t val; |
683 |
cpu_to_le16w(&val, va_arg(ap, int));
|
684 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
685 |
break;
|
686 |
} |
687 |
case 'd': { |
688 |
uint32_t val; |
689 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
690 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
691 |
break;
|
692 |
} |
693 |
case 'q': { |
694 |
uint64_t val; |
695 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
696 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
697 |
break;
|
698 |
} |
699 |
case 'v': { |
700 |
struct iovec *iov = va_arg(ap, struct iovec *); |
701 |
int *iovcnt = va_arg(ap, int *); |
702 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
703 |
break;
|
704 |
} |
705 |
case 's': { |
706 |
V9fsString *str = va_arg(ap, V9fsString *); |
707 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
708 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
709 |
break;
|
710 |
} |
711 |
case 'Q': { |
712 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
713 |
offset += pdu_marshal(pdu, offset, "bdq",
|
714 |
qidp->type, qidp->version, qidp->path); |
715 |
break;
|
716 |
} |
717 |
case 'S': { |
718 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
719 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
720 |
statp->size, statp->type, statp->dev, |
721 |
&statp->qid, statp->mode, statp->atime, |
722 |
statp->mtime, statp->length, &statp->name, |
723 |
&statp->uid, &statp->gid, &statp->muid, |
724 |
&statp->extension, statp->n_uid, |
725 |
statp->n_gid, statp->n_muid); |
726 |
break;
|
727 |
} |
728 |
default:
|
729 |
break;
|
730 |
} |
731 |
} |
732 |
va_end(ap); |
733 |
|
734 |
return offset - old_offset;
|
735 |
} |
736 |
|
737 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
738 |
{ |
739 |
int8_t id = pdu->id + 1; /* Response */ |
740 |
|
741 |
if (len < 0) { |
742 |
V9fsString str; |
743 |
int err = -len;
|
744 |
|
745 |
str.data = strerror(err); |
746 |
str.size = strlen(str.data); |
747 |
|
748 |
len = 7;
|
749 |
len += pdu_marshal(pdu, len, "s", &str);
|
750 |
if (dotu) {
|
751 |
len += pdu_marshal(pdu, len, "d", err);
|
752 |
} |
753 |
|
754 |
id = P9_RERROR; |
755 |
} |
756 |
|
757 |
/* fill out the header */
|
758 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
759 |
|
760 |
/* keep these in sync */
|
761 |
pdu->size = len; |
762 |
pdu->id = id; |
763 |
|
764 |
/* push onto queue and notify */
|
765 |
virtqueue_push(s->vq, &pdu->elem, len); |
766 |
|
767 |
/* FIXME: we should batch these completions */
|
768 |
virtio_notify(&s->vdev, s->vq); |
769 |
|
770 |
free_pdu(s, pdu); |
771 |
} |
772 |
|
773 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
774 |
{ |
775 |
mode_t ret; |
776 |
|
777 |
ret = mode & 0777;
|
778 |
if (mode & P9_STAT_MODE_DIR) {
|
779 |
ret |= S_IFDIR; |
780 |
} |
781 |
|
782 |
if (dotu) {
|
783 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
784 |
ret |= S_IFLNK; |
785 |
} |
786 |
if (mode & P9_STAT_MODE_SOCKET) {
|
787 |
ret |= S_IFSOCK; |
788 |
} |
789 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
790 |
ret |= S_IFIFO; |
791 |
} |
792 |
if (mode & P9_STAT_MODE_DEVICE) {
|
793 |
if (extension && extension->data[0] == 'c') { |
794 |
ret |= S_IFCHR; |
795 |
} else {
|
796 |
ret |= S_IFBLK; |
797 |
} |
798 |
} |
799 |
} |
800 |
|
801 |
if (!(ret&~0777)) { |
802 |
ret |= S_IFREG; |
803 |
} |
804 |
|
805 |
if (mode & P9_STAT_MODE_SETUID) {
|
806 |
ret |= S_ISUID; |
807 |
} |
808 |
if (mode & P9_STAT_MODE_SETGID) {
|
809 |
ret |= S_ISGID; |
810 |
} |
811 |
if (mode & P9_STAT_MODE_SETVTX) {
|
812 |
ret |= S_ISVTX; |
813 |
} |
814 |
|
815 |
return ret;
|
816 |
} |
817 |
|
818 |
static int donttouch_stat(V9fsStat *stat) |
819 |
{ |
820 |
if (stat->type == -1 && |
821 |
stat->dev == -1 &&
|
822 |
stat->qid.type == -1 &&
|
823 |
stat->qid.version == -1 &&
|
824 |
stat->qid.path == -1 &&
|
825 |
stat->mode == -1 &&
|
826 |
stat->atime == -1 &&
|
827 |
stat->mtime == -1 &&
|
828 |
stat->length == -1 &&
|
829 |
!stat->name.size && |
830 |
!stat->uid.size && |
831 |
!stat->gid.size && |
832 |
!stat->muid.size && |
833 |
stat->n_uid == -1 &&
|
834 |
stat->n_gid == -1 &&
|
835 |
stat->n_muid == -1) {
|
836 |
return 1; |
837 |
} |
838 |
|
839 |
return 0; |
840 |
} |
841 |
|
842 |
static void v9fs_stat_free(V9fsStat *stat) |
843 |
{ |
844 |
v9fs_string_free(&stat->name); |
845 |
v9fs_string_free(&stat->uid); |
846 |
v9fs_string_free(&stat->gid); |
847 |
v9fs_string_free(&stat->muid); |
848 |
v9fs_string_free(&stat->extension); |
849 |
} |
850 |
|
851 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
852 |
{ |
853 |
uint32_t mode; |
854 |
|
855 |
mode = stbuf->st_mode & 0777;
|
856 |
if (S_ISDIR(stbuf->st_mode)) {
|
857 |
mode |= P9_STAT_MODE_DIR; |
858 |
} |
859 |
|
860 |
if (dotu) {
|
861 |
if (S_ISLNK(stbuf->st_mode)) {
|
862 |
mode |= P9_STAT_MODE_SYMLINK; |
863 |
} |
864 |
|
865 |
if (S_ISSOCK(stbuf->st_mode)) {
|
866 |
mode |= P9_STAT_MODE_SOCKET; |
867 |
} |
868 |
|
869 |
if (S_ISFIFO(stbuf->st_mode)) {
|
870 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
871 |
} |
872 |
|
873 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
874 |
mode |= P9_STAT_MODE_DEVICE; |
875 |
} |
876 |
|
877 |
if (stbuf->st_mode & S_ISUID) {
|
878 |
mode |= P9_STAT_MODE_SETUID; |
879 |
} |
880 |
|
881 |
if (stbuf->st_mode & S_ISGID) {
|
882 |
mode |= P9_STAT_MODE_SETGID; |
883 |
} |
884 |
|
885 |
if (stbuf->st_mode & S_ISVTX) {
|
886 |
mode |= P9_STAT_MODE_SETVTX; |
887 |
} |
888 |
} |
889 |
|
890 |
return mode;
|
891 |
} |
892 |
|
893 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
894 |
const struct stat *stbuf, |
895 |
V9fsStat *v9stat) |
896 |
{ |
897 |
int err;
|
898 |
const char *str; |
899 |
|
900 |
memset(v9stat, 0, sizeof(*v9stat)); |
901 |
|
902 |
stat_to_qid(stbuf, &v9stat->qid); |
903 |
v9stat->mode = stat_to_v9mode(stbuf); |
904 |
v9stat->atime = stbuf->st_atime; |
905 |
v9stat->mtime = stbuf->st_mtime; |
906 |
v9stat->length = stbuf->st_size; |
907 |
|
908 |
v9fs_string_null(&v9stat->uid); |
909 |
v9fs_string_null(&v9stat->gid); |
910 |
v9fs_string_null(&v9stat->muid); |
911 |
|
912 |
if (dotu) {
|
913 |
v9stat->n_uid = stbuf->st_uid; |
914 |
v9stat->n_gid = stbuf->st_gid; |
915 |
v9stat->n_muid = 0;
|
916 |
|
917 |
v9fs_string_null(&v9stat->extension); |
918 |
|
919 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
920 |
err = v9fs_do_readlink(s, name, &v9stat->extension); |
921 |
if (err == -1) { |
922 |
err = -errno; |
923 |
return err;
|
924 |
} |
925 |
v9stat->extension.data[err] = 0;
|
926 |
v9stat->extension.size = err; |
927 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
928 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
929 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
930 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
931 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
932 |
v9fs_string_sprintf(&v9stat->extension, "%s %u",
|
933 |
"HARDLINKCOUNT", stbuf->st_nlink);
|
934 |
} |
935 |
} |
936 |
|
937 |
str = strrchr(name->data, '/');
|
938 |
if (str) {
|
939 |
str += 1;
|
940 |
} else {
|
941 |
str = name->data; |
942 |
} |
943 |
|
944 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
945 |
|
946 |
v9stat->size = 61 +
|
947 |
v9fs_string_size(&v9stat->name) + |
948 |
v9fs_string_size(&v9stat->uid) + |
949 |
v9fs_string_size(&v9stat->gid) + |
950 |
v9fs_string_size(&v9stat->muid) + |
951 |
v9fs_string_size(&v9stat->extension); |
952 |
return 0; |
953 |
} |
954 |
|
955 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
956 |
{ |
957 |
while (len && *iovcnt) {
|
958 |
if (len < sg->iov_len) {
|
959 |
sg->iov_len -= len; |
960 |
sg->iov_base += len; |
961 |
len = 0;
|
962 |
} else {
|
963 |
len -= sg->iov_len; |
964 |
sg++; |
965 |
*iovcnt -= 1;
|
966 |
} |
967 |
} |
968 |
|
969 |
return sg;
|
970 |
} |
971 |
|
972 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
973 |
{ |
974 |
int i;
|
975 |
int total = 0; |
976 |
|
977 |
for (i = 0; i < *cnt; i++) { |
978 |
if ((total + sg[i].iov_len) > cap) {
|
979 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
980 |
i++; |
981 |
break;
|
982 |
} |
983 |
total += sg[i].iov_len; |
984 |
} |
985 |
|
986 |
*cnt = i; |
987 |
|
988 |
return sg;
|
989 |
} |
990 |
|
991 |
static void print_sg(struct iovec *sg, int cnt) |
992 |
{ |
993 |
int i;
|
994 |
|
995 |
printf("sg[%d]: {", cnt);
|
996 |
for (i = 0; i < cnt; i++) { |
997 |
if (i) {
|
998 |
printf(", ");
|
999 |
} |
1000 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
1001 |
} |
1002 |
printf("}\n");
|
1003 |
} |
1004 |
|
1005 |
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1006 |
{ |
1007 |
V9fsString str; |
1008 |
v9fs_string_init(&str); |
1009 |
v9fs_string_copy(&str, dst); |
1010 |
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
1011 |
v9fs_string_free(&str); |
1012 |
} |
1013 |
|
1014 |
static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
1015 |
{ |
1016 |
int32_t msize; |
1017 |
V9fsString version; |
1018 |
size_t offset = 7;
|
1019 |
|
1020 |
pdu_unmarshal(pdu, offset, "ds", &msize, &version);
|
1021 |
|
1022 |
if (strcmp(version.data, "9P2000.u")) { |
1023 |
v9fs_string_sprintf(&version, "unknown");
|
1024 |
} |
1025 |
|
1026 |
offset += pdu_marshal(pdu, offset, "ds", msize, &version);
|
1027 |
complete_pdu(s, pdu, offset); |
1028 |
|
1029 |
v9fs_string_free(&version); |
1030 |
} |
1031 |
|
1032 |
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) |
1033 |
{ |
1034 |
int32_t fid, afid, n_uname; |
1035 |
V9fsString uname, aname; |
1036 |
V9fsFidState *fidp; |
1037 |
V9fsQID qid; |
1038 |
size_t offset = 7;
|
1039 |
ssize_t err; |
1040 |
|
1041 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
1042 |
|
1043 |
fidp = alloc_fid(s, fid); |
1044 |
if (fidp == NULL) { |
1045 |
err = -EINVAL; |
1046 |
goto out;
|
1047 |
} |
1048 |
|
1049 |
fidp->uid = n_uname; |
1050 |
|
1051 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
1052 |
err = fid_to_qid(s, fidp, &qid); |
1053 |
if (err) {
|
1054 |
err = -EINVAL; |
1055 |
free_fid(s, fid); |
1056 |
goto out;
|
1057 |
} |
1058 |
|
1059 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
1060 |
|
1061 |
err = offset; |
1062 |
out:
|
1063 |
complete_pdu(s, pdu, err); |
1064 |
v9fs_string_free(&uname); |
1065 |
v9fs_string_free(&aname); |
1066 |
} |
1067 |
|
1068 |
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1069 |
{ |
1070 |
if (err == -1) { |
1071 |
err = -errno; |
1072 |
goto out;
|
1073 |
} |
1074 |
|
1075 |
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); |
1076 |
if (err) {
|
1077 |
goto out;
|
1078 |
} |
1079 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); |
1080 |
err = vs->offset; |
1081 |
|
1082 |
out:
|
1083 |
complete_pdu(s, vs->pdu, err); |
1084 |
v9fs_stat_free(&vs->v9stat); |
1085 |
qemu_free(vs); |
1086 |
} |
1087 |
|
1088 |
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1089 |
{ |
1090 |
int32_t fid; |
1091 |
V9fsStatState *vs; |
1092 |
ssize_t err = 0;
|
1093 |
|
1094 |
vs = qemu_malloc(sizeof(*vs));
|
1095 |
vs->pdu = pdu; |
1096 |
vs->offset = 7;
|
1097 |
|
1098 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1099 |
|
1100 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
1101 |
|
1102 |
vs->fidp = lookup_fid(s, fid); |
1103 |
if (vs->fidp == NULL) { |
1104 |
err = -ENOENT; |
1105 |
goto out;
|
1106 |
} |
1107 |
|
1108 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1109 |
v9fs_stat_post_lstat(s, vs, err); |
1110 |
return;
|
1111 |
|
1112 |
out:
|
1113 |
complete_pdu(s, vs->pdu, err); |
1114 |
v9fs_stat_free(&vs->v9stat); |
1115 |
qemu_free(vs); |
1116 |
} |
1117 |
|
1118 |
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1119 |
{ |
1120 |
complete_pdu(s, vs->pdu, err); |
1121 |
|
1122 |
if (vs->nwnames) {
|
1123 |
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1124 |
v9fs_string_free(&vs->wnames[vs->name_idx]); |
1125 |
} |
1126 |
|
1127 |
qemu_free(vs->wnames); |
1128 |
qemu_free(vs->qids); |
1129 |
} |
1130 |
} |
1131 |
|
1132 |
static void v9fs_walk_marshal(V9fsWalkState *vs) |
1133 |
{ |
1134 |
int i;
|
1135 |
vs->offset = 7;
|
1136 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
1137 |
|
1138 |
for (i = 0; i < vs->nwnames; i++) { |
1139 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
1140 |
} |
1141 |
} |
1142 |
|
1143 |
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1144 |
int err)
|
1145 |
{ |
1146 |
if (err == -1) { |
1147 |
free_fid(s, vs->newfidp->fid); |
1148 |
v9fs_string_free(&vs->path); |
1149 |
err = -ENOENT; |
1150 |
goto out;
|
1151 |
} |
1152 |
|
1153 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1154 |
|
1155 |
vs->name_idx++; |
1156 |
if (vs->name_idx < vs->nwnames) {
|
1157 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1158 |
vs->wnames[vs->name_idx].data); |
1159 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1160 |
|
1161 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1162 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1163 |
return;
|
1164 |
} |
1165 |
|
1166 |
v9fs_string_free(&vs->path); |
1167 |
v9fs_walk_marshal(vs); |
1168 |
err = vs->offset; |
1169 |
out:
|
1170 |
v9fs_walk_complete(s, vs, err); |
1171 |
} |
1172 |
|
1173 |
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1174 |
int err)
|
1175 |
{ |
1176 |
if (err == -1) { |
1177 |
v9fs_string_free(&vs->path); |
1178 |
err = -ENOENT; |
1179 |
goto out;
|
1180 |
} |
1181 |
|
1182 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1183 |
vs->name_idx++; |
1184 |
if (vs->name_idx < vs->nwnames) {
|
1185 |
|
1186 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1187 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1188 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1189 |
|
1190 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1191 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1192 |
return;
|
1193 |
} |
1194 |
|
1195 |
v9fs_string_free(&vs->path); |
1196 |
v9fs_walk_marshal(vs); |
1197 |
err = vs->offset; |
1198 |
out:
|
1199 |
v9fs_walk_complete(s, vs, err); |
1200 |
} |
1201 |
|
1202 |
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1203 |
{ |
1204 |
int32_t fid, newfid; |
1205 |
V9fsWalkState *vs; |
1206 |
int err = 0; |
1207 |
int i;
|
1208 |
|
1209 |
vs = qemu_malloc(sizeof(*vs));
|
1210 |
vs->pdu = pdu; |
1211 |
vs->wnames = NULL;
|
1212 |
vs->qids = NULL;
|
1213 |
vs->offset = 7;
|
1214 |
|
1215 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
1216 |
&newfid, &vs->nwnames); |
1217 |
|
1218 |
if (vs->nwnames) {
|
1219 |
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
1220 |
|
1221 |
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); |
1222 |
|
1223 |
for (i = 0; i < vs->nwnames; i++) { |
1224 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
1225 |
&vs->wnames[i]); |
1226 |
} |
1227 |
} |
1228 |
|
1229 |
vs->fidp = lookup_fid(s, fid); |
1230 |
if (vs->fidp == NULL) { |
1231 |
err = -ENOENT; |
1232 |
goto out;
|
1233 |
} |
1234 |
|
1235 |
/* FIXME: is this really valid? */
|
1236 |
if (fid == newfid) {
|
1237 |
|
1238 |
BUG_ON(vs->fidp->fd != -1);
|
1239 |
BUG_ON(vs->fidp->dir); |
1240 |
v9fs_string_init(&vs->path); |
1241 |
vs->name_idx = 0;
|
1242 |
|
1243 |
if (vs->name_idx < vs->nwnames) {
|
1244 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1245 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1246 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1247 |
|
1248 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1249 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1250 |
return;
|
1251 |
} |
1252 |
} else {
|
1253 |
vs->newfidp = alloc_fid(s, newfid); |
1254 |
if (vs->newfidp == NULL) { |
1255 |
err = -EINVAL; |
1256 |
goto out;
|
1257 |
} |
1258 |
|
1259 |
vs->newfidp->uid = vs->fidp->uid; |
1260 |
v9fs_string_init(&vs->path); |
1261 |
vs->name_idx = 0;
|
1262 |
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); |
1263 |
|
1264 |
if (vs->name_idx < vs->nwnames) {
|
1265 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1266 |
vs->wnames[vs->name_idx].data); |
1267 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1268 |
|
1269 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1270 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1271 |
return;
|
1272 |
} |
1273 |
} |
1274 |
|
1275 |
v9fs_walk_marshal(vs); |
1276 |
err = vs->offset; |
1277 |
out:
|
1278 |
v9fs_walk_complete(s, vs, err); |
1279 |
} |
1280 |
|
1281 |
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1282 |
{ |
1283 |
if (vs->fidp->dir == NULL) { |
1284 |
err = -errno; |
1285 |
goto out;
|
1286 |
} |
1287 |
|
1288 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1289 |
err = vs->offset; |
1290 |
out:
|
1291 |
complete_pdu(s, vs->pdu, err); |
1292 |
qemu_free(vs); |
1293 |
|
1294 |
} |
1295 |
|
1296 |
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1297 |
{ |
1298 |
if (vs->fidp->fd == -1) { |
1299 |
err = -errno; |
1300 |
goto out;
|
1301 |
} |
1302 |
|
1303 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1304 |
err = vs->offset; |
1305 |
out:
|
1306 |
complete_pdu(s, vs->pdu, err); |
1307 |
qemu_free(vs); |
1308 |
} |
1309 |
|
1310 |
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) |
1311 |
{ |
1312 |
if (err) {
|
1313 |
err = -errno; |
1314 |
goto out;
|
1315 |
} |
1316 |
|
1317 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1318 |
|
1319 |
if (S_ISDIR(vs->stbuf.st_mode)) {
|
1320 |
vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path); |
1321 |
v9fs_open_post_opendir(s, vs, err); |
1322 |
} else {
|
1323 |
vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path, |
1324 |
omode_to_uflags(vs->mode)); |
1325 |
v9fs_open_post_open(s, vs, err); |
1326 |
} |
1327 |
return;
|
1328 |
out:
|
1329 |
complete_pdu(s, vs->pdu, err); |
1330 |
qemu_free(vs); |
1331 |
} |
1332 |
|
1333 |
static void v9fs_open(V9fsState *s, V9fsPDU *pdu) |
1334 |
{ |
1335 |
int32_t fid; |
1336 |
V9fsOpenState *vs; |
1337 |
ssize_t err = 0;
|
1338 |
|
1339 |
|
1340 |
vs = qemu_malloc(sizeof(*vs));
|
1341 |
vs->pdu = pdu; |
1342 |
vs->offset = 7;
|
1343 |
|
1344 |
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
1345 |
|
1346 |
vs->fidp = lookup_fid(s, fid); |
1347 |
if (vs->fidp == NULL) { |
1348 |
err = -ENOENT; |
1349 |
goto out;
|
1350 |
} |
1351 |
|
1352 |
BUG_ON(vs->fidp->fd != -1);
|
1353 |
BUG_ON(vs->fidp->dir); |
1354 |
|
1355 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1356 |
|
1357 |
v9fs_open_post_lstat(s, vs, err); |
1358 |
return;
|
1359 |
out:
|
1360 |
complete_pdu(s, pdu, err); |
1361 |
qemu_free(vs); |
1362 |
} |
1363 |
|
1364 |
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
1365 |
{ |
1366 |
int32_t fid; |
1367 |
size_t offset = 7;
|
1368 |
int err;
|
1369 |
|
1370 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1371 |
|
1372 |
err = free_fid(s, fid); |
1373 |
if (err < 0) { |
1374 |
goto out;
|
1375 |
} |
1376 |
|
1377 |
offset = 7;
|
1378 |
err = offset; |
1379 |
out:
|
1380 |
complete_pdu(s, pdu, err); |
1381 |
} |
1382 |
|
1383 |
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1384 |
|
1385 |
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1386 |
{ |
1387 |
if (err) {
|
1388 |
goto out;
|
1389 |
} |
1390 |
v9fs_stat_free(&vs->v9stat); |
1391 |
v9fs_string_free(&vs->name); |
1392 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1393 |
vs->offset += vs->count; |
1394 |
err = vs->offset; |
1395 |
out:
|
1396 |
complete_pdu(s, vs->pdu, err); |
1397 |
qemu_free(vs); |
1398 |
return;
|
1399 |
} |
1400 |
|
1401 |
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, |
1402 |
ssize_t err) |
1403 |
{ |
1404 |
if (err) {
|
1405 |
err = -errno; |
1406 |
goto out;
|
1407 |
} |
1408 |
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); |
1409 |
if (err) {
|
1410 |
goto out;
|
1411 |
} |
1412 |
|
1413 |
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", |
1414 |
&vs->v9stat); |
1415 |
if ((vs->len != (vs->v9stat.size + 2)) || |
1416 |
((vs->count + vs->len) > vs->max_count)) { |
1417 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); |
1418 |
v9fs_read_post_seekdir(s, vs, err); |
1419 |
return;
|
1420 |
} |
1421 |
vs->count += vs->len; |
1422 |
v9fs_stat_free(&vs->v9stat); |
1423 |
v9fs_string_free(&vs->name); |
1424 |
vs->dir_pos = vs->dent->d_off; |
1425 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
1426 |
v9fs_read_post_readdir(s, vs, err); |
1427 |
return;
|
1428 |
out:
|
1429 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); |
1430 |
v9fs_read_post_seekdir(s, vs, err); |
1431 |
return;
|
1432 |
|
1433 |
} |
1434 |
|
1435 |
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1436 |
{ |
1437 |
if (vs->dent) {
|
1438 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1439 |
v9fs_string_init(&vs->name); |
1440 |
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
1441 |
vs->dent->d_name); |
1442 |
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); |
1443 |
v9fs_read_post_dir_lstat(s, vs, err); |
1444 |
return;
|
1445 |
} |
1446 |
|
1447 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1448 |
vs->offset += vs->count; |
1449 |
err = vs->offset; |
1450 |
complete_pdu(s, vs->pdu, err); |
1451 |
qemu_free(vs); |
1452 |
return;
|
1453 |
} |
1454 |
|
1455 |
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1456 |
{ |
1457 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
1458 |
v9fs_read_post_readdir(s, vs, err); |
1459 |
return;
|
1460 |
} |
1461 |
|
1462 |
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, |
1463 |
ssize_t err) |
1464 |
{ |
1465 |
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir); |
1466 |
v9fs_read_post_telldir(s, vs, err); |
1467 |
return;
|
1468 |
} |
1469 |
|
1470 |
static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1471 |
{ |
1472 |
if (err < 0) { |
1473 |
/* IO error return the error */
|
1474 |
err = -errno; |
1475 |
goto out;
|
1476 |
} |
1477 |
vs->total += vs->len; |
1478 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
1479 |
if (vs->total < vs->count && vs->len > 0) { |
1480 |
do {
|
1481 |
if (0) { |
1482 |
print_sg(vs->sg, vs->cnt); |
1483 |
} |
1484 |
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); |
1485 |
} while (vs->len == -1 && errno == EINTR); |
1486 |
if (vs->len == -1) { |
1487 |
err = -errno; |
1488 |
} |
1489 |
v9fs_read_post_readv(s, vs, err); |
1490 |
return;
|
1491 |
} |
1492 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
1493 |
vs->offset += vs->count; |
1494 |
err = vs->offset; |
1495 |
|
1496 |
out:
|
1497 |
complete_pdu(s, vs->pdu, err); |
1498 |
qemu_free(vs); |
1499 |
} |
1500 |
|
1501 |
static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1502 |
{ |
1503 |
if (err == -1) { |
1504 |
err = -errno; |
1505 |
goto out;
|
1506 |
} |
1507 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1508 |
|
1509 |
if (vs->total < vs->count) {
|
1510 |
do {
|
1511 |
if (0) { |
1512 |
print_sg(vs->sg, vs->cnt); |
1513 |
} |
1514 |
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); |
1515 |
} while (vs->len == -1 && errno == EINTR); |
1516 |
if (vs->len == -1) { |
1517 |
err = -errno; |
1518 |
} |
1519 |
v9fs_read_post_readv(s, vs, err); |
1520 |
return;
|
1521 |
} |
1522 |
out:
|
1523 |
complete_pdu(s, vs->pdu, err); |
1524 |
qemu_free(vs); |
1525 |
} |
1526 |
|
1527 |
static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
1528 |
{ |
1529 |
int32_t fid; |
1530 |
V9fsReadState *vs; |
1531 |
ssize_t err = 0;
|
1532 |
|
1533 |
vs = qemu_malloc(sizeof(*vs));
|
1534 |
vs->pdu = pdu; |
1535 |
vs->offset = 7;
|
1536 |
vs->total = 0;
|
1537 |
vs->len = 0;
|
1538 |
vs->count = 0;
|
1539 |
|
1540 |
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
1541 |
|
1542 |
vs->fidp = lookup_fid(s, fid); |
1543 |
if (vs->fidp == NULL) { |
1544 |
err = -EINVAL; |
1545 |
goto out;
|
1546 |
} |
1547 |
|
1548 |
if (vs->fidp->dir) {
|
1549 |
vs->max_count = vs->count; |
1550 |
vs->count = 0;
|
1551 |
if (vs->off == 0) { |
1552 |
v9fs_do_rewinddir(s, vs->fidp->dir); |
1553 |
} |
1554 |
v9fs_read_post_rewinddir(s, vs, err); |
1555 |
return;
|
1556 |
} else if (vs->fidp->fd != -1) { |
1557 |
vs->sg = vs->iov; |
1558 |
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); |
1559 |
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); |
1560 |
v9fs_read_post_lseek(s, vs, err); |
1561 |
return;
|
1562 |
} else {
|
1563 |
err = -EINVAL; |
1564 |
} |
1565 |
out:
|
1566 |
complete_pdu(s, pdu, err); |
1567 |
qemu_free(vs); |
1568 |
} |
1569 |
|
1570 |
static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, |
1571 |
ssize_t err) |
1572 |
{ |
1573 |
if (err < 0) { |
1574 |
/* IO error return the error */
|
1575 |
err = -errno; |
1576 |
goto out;
|
1577 |
} |
1578 |
vs->total += vs->len; |
1579 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
1580 |
if (vs->total < vs->count && vs->len > 0) { |
1581 |
do {
|
1582 |
if (0) { |
1583 |
print_sg(vs->sg, vs->cnt); |
1584 |
} |
1585 |
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); |
1586 |
} while (vs->len == -1 && errno == EINTR); |
1587 |
if (vs->len == -1) { |
1588 |
err = -errno; |
1589 |
} |
1590 |
v9fs_write_post_writev(s, vs, err); |
1591 |
return;
|
1592 |
} |
1593 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
1594 |
|
1595 |
err = vs->offset; |
1596 |
out:
|
1597 |
complete_pdu(s, vs->pdu, err); |
1598 |
qemu_free(vs); |
1599 |
} |
1600 |
|
1601 |
static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) |
1602 |
{ |
1603 |
if (err == -1) { |
1604 |
err = -errno; |
1605 |
goto out;
|
1606 |
} |
1607 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1608 |
|
1609 |
if (vs->total < vs->count) {
|
1610 |
do {
|
1611 |
if (0) { |
1612 |
print_sg(vs->sg, vs->cnt); |
1613 |
} |
1614 |
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); |
1615 |
} while (vs->len == -1 && errno == EINTR); |
1616 |
if (vs->len == -1) { |
1617 |
err = -errno; |
1618 |
} |
1619 |
v9fs_write_post_writev(s, vs, err); |
1620 |
return;
|
1621 |
} |
1622 |
|
1623 |
out:
|
1624 |
complete_pdu(s, vs->pdu, err); |
1625 |
qemu_free(vs); |
1626 |
} |
1627 |
|
1628 |
static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
1629 |
{ |
1630 |
int32_t fid; |
1631 |
V9fsWriteState *vs; |
1632 |
ssize_t err; |
1633 |
|
1634 |
vs = qemu_malloc(sizeof(*vs));
|
1635 |
|
1636 |
vs->pdu = pdu; |
1637 |
vs->offset = 7;
|
1638 |
vs->sg = vs->iov; |
1639 |
vs->total = 0;
|
1640 |
vs->len = 0;
|
1641 |
|
1642 |
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
1643 |
vs->sg, &vs->cnt); |
1644 |
|
1645 |
vs->fidp = lookup_fid(s, fid); |
1646 |
if (vs->fidp == NULL) { |
1647 |
err = -EINVAL; |
1648 |
goto out;
|
1649 |
} |
1650 |
|
1651 |
if (vs->fidp->fd == -1) { |
1652 |
err = -EINVAL; |
1653 |
goto out;
|
1654 |
} |
1655 |
|
1656 |
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); |
1657 |
|
1658 |
v9fs_write_post_lseek(s, vs, err); |
1659 |
return;
|
1660 |
|
1661 |
out:
|
1662 |
complete_pdu(s, vs->pdu, err); |
1663 |
qemu_free(vs); |
1664 |
} |
1665 |
|
1666 |
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
1667 |
{ |
1668 |
if (err == 0) { |
1669 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
1670 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1671 |
|
1672 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1673 |
|
1674 |
err = vs->offset; |
1675 |
} |
1676 |
|
1677 |
complete_pdu(s, vs->pdu, err); |
1678 |
v9fs_string_free(&vs->name); |
1679 |
v9fs_string_free(&vs->extension); |
1680 |
v9fs_string_free(&vs->fullname); |
1681 |
qemu_free(vs); |
1682 |
} |
1683 |
|
1684 |
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) |
1685 |
{ |
1686 |
if (err) {
|
1687 |
err = -errno; |
1688 |
} |
1689 |
v9fs_post_create(s, vs, err); |
1690 |
} |
1691 |
|
1692 |
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, |
1693 |
int err)
|
1694 |
{ |
1695 |
if (!vs->fidp->dir) {
|
1696 |
err = -errno; |
1697 |
} |
1698 |
v9fs_post_create(s, vs, err); |
1699 |
} |
1700 |
|
1701 |
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, |
1702 |
int err)
|
1703 |
{ |
1704 |
if (err) {
|
1705 |
err = -errno; |
1706 |
goto out;
|
1707 |
} |
1708 |
|
1709 |
vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname); |
1710 |
v9fs_create_post_opendir(s, vs, err); |
1711 |
return;
|
1712 |
|
1713 |
out:
|
1714 |
v9fs_post_create(s, vs, err); |
1715 |
} |
1716 |
|
1717 |
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) |
1718 |
{ |
1719 |
if (err) {
|
1720 |
err = -errno; |
1721 |
goto out;
|
1722 |
} |
1723 |
|
1724 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
1725 |
v9fs_create_post_dir_lstat(s, vs, err); |
1726 |
return;
|
1727 |
|
1728 |
out:
|
1729 |
v9fs_post_create(s, vs, err); |
1730 |
} |
1731 |
|
1732 |
static void v9fs_create_post_mksock(V9fsState *s, V9fsCreateState *vs, |
1733 |
int err)
|
1734 |
{ |
1735 |
if (err) {
|
1736 |
err = -errno; |
1737 |
goto out;
|
1738 |
} |
1739 |
|
1740 |
err = v9fs_do_chmod(s, &vs->fullname, vs->perm & 0777);
|
1741 |
v9fs_create_post_perms(s, vs, err); |
1742 |
return;
|
1743 |
|
1744 |
out:
|
1745 |
v9fs_post_create(s, vs, err); |
1746 |
} |
1747 |
|
1748 |
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
1749 |
{ |
1750 |
if (err) {
|
1751 |
vs->fidp->fd = -1;
|
1752 |
err = -errno; |
1753 |
} |
1754 |
|
1755 |
v9fs_post_create(s, vs, err); |
1756 |
return;
|
1757 |
} |
1758 |
|
1759 |
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) |
1760 |
{ |
1761 |
if (vs->fidp->fd == -1) { |
1762 |
err = -errno; |
1763 |
goto out;
|
1764 |
} |
1765 |
|
1766 |
err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf); |
1767 |
v9fs_create_post_fstat(s, vs, err); |
1768 |
|
1769 |
return;
|
1770 |
|
1771 |
out:
|
1772 |
v9fs_post_create(s, vs, err); |
1773 |
|
1774 |
} |
1775 |
|
1776 |
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) |
1777 |
{ |
1778 |
|
1779 |
if (err == 0 || errno != ENOENT) { |
1780 |
err = -errno; |
1781 |
goto out;
|
1782 |
} |
1783 |
|
1784 |
if (vs->perm & P9_STAT_MODE_DIR) {
|
1785 |
err = v9fs_do_mkdir(s, vs); |
1786 |
v9fs_create_post_mkdir(s, vs, err); |
1787 |
} else if (vs->perm & P9_STAT_MODE_SYMLINK) { |
1788 |
err = v9fs_do_symlink(s, &vs->extension, &vs->fullname); |
1789 |
v9fs_create_post_perms(s, vs, err); |
1790 |
} else if (vs->perm & P9_STAT_MODE_LINK) { |
1791 |
int32_t nfid = atoi(vs->extension.data); |
1792 |
V9fsFidState *nfidp = lookup_fid(s, nfid); |
1793 |
if (nfidp == NULL) { |
1794 |
err = -errno; |
1795 |
v9fs_post_create(s, vs, err); |
1796 |
} |
1797 |
err = v9fs_do_link(s, &nfidp->path, &vs->fullname); |
1798 |
v9fs_create_post_perms(s, vs, err); |
1799 |
} else if (vs->perm & P9_STAT_MODE_DEVICE) { |
1800 |
char ctype;
|
1801 |
uint32_t major, minor; |
1802 |
mode_t nmode = 0;
|
1803 |
|
1804 |
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, |
1805 |
&minor) != 3) {
|
1806 |
err = -errno; |
1807 |
v9fs_post_create(s, vs, err); |
1808 |
} |
1809 |
|
1810 |
switch (ctype) {
|
1811 |
case 'c': |
1812 |
nmode = S_IFCHR; |
1813 |
break;
|
1814 |
case 'b': |
1815 |
nmode = S_IFBLK; |
1816 |
break;
|
1817 |
default:
|
1818 |
err = -EIO; |
1819 |
v9fs_post_create(s, vs, err); |
1820 |
} |
1821 |
|
1822 |
nmode |= vs->perm & 0777;
|
1823 |
err = v9fs_do_mknod(s, &vs->fullname, nmode, makedev(major, minor)); |
1824 |
v9fs_create_post_perms(s, vs, err); |
1825 |
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { |
1826 |
err = v9fs_do_mknod(s, &vs->fullname, S_IFIFO | (vs->mode & 0777), 0); |
1827 |
v9fs_post_create(s, vs, err); |
1828 |
} else if (vs->perm & P9_STAT_MODE_SOCKET) { |
1829 |
err = v9fs_do_mksock(s, &vs->fullname); |
1830 |
v9fs_create_post_mksock(s, vs, err); |
1831 |
} else {
|
1832 |
vs->fidp->fd = v9fs_do_open2(s, vs); |
1833 |
v9fs_create_post_open2(s, vs, err); |
1834 |
} |
1835 |
|
1836 |
return;
|
1837 |
|
1838 |
out:
|
1839 |
v9fs_post_create(s, vs, err); |
1840 |
} |
1841 |
|
1842 |
static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
1843 |
{ |
1844 |
int32_t fid; |
1845 |
V9fsCreateState *vs; |
1846 |
int err = 0; |
1847 |
|
1848 |
vs = qemu_malloc(sizeof(*vs));
|
1849 |
vs->pdu = pdu; |
1850 |
vs->offset = 7;
|
1851 |
|
1852 |
v9fs_string_init(&vs->fullname); |
1853 |
|
1854 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
1855 |
&vs->perm, &vs->mode, &vs->extension); |
1856 |
|
1857 |
vs->fidp = lookup_fid(s, fid); |
1858 |
if (vs->fidp == NULL) { |
1859 |
err = -EINVAL; |
1860 |
goto out;
|
1861 |
} |
1862 |
|
1863 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
1864 |
vs->name.data); |
1865 |
|
1866 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
1867 |
v9fs_create_post_lstat(s, vs, err); |
1868 |
return;
|
1869 |
|
1870 |
out:
|
1871 |
complete_pdu(s, vs->pdu, err); |
1872 |
v9fs_string_free(&vs->name); |
1873 |
v9fs_string_free(&vs->extension); |
1874 |
qemu_free(vs); |
1875 |
} |
1876 |
|
1877 |
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
1878 |
{ |
1879 |
/* A nop call with no return */
|
1880 |
complete_pdu(s, pdu, 7);
|
1881 |
} |
1882 |
|
1883 |
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
1884 |
int err)
|
1885 |
{ |
1886 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
1887 |
err = free_fid(s, vs->fidp->fid); |
1888 |
if (err < 0) { |
1889 |
goto out;
|
1890 |
} |
1891 |
|
1892 |
err = vs->offset; |
1893 |
out:
|
1894 |
complete_pdu(s, vs->pdu, err); |
1895 |
qemu_free(vs); |
1896 |
} |
1897 |
|
1898 |
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
1899 |
{ |
1900 |
int32_t fid; |
1901 |
V9fsRemoveState *vs; |
1902 |
int err = 0; |
1903 |
|
1904 |
vs = qemu_malloc(sizeof(*vs));
|
1905 |
vs->pdu = pdu; |
1906 |
vs->offset = 7;
|
1907 |
|
1908 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
1909 |
|
1910 |
vs->fidp = lookup_fid(s, fid); |
1911 |
if (vs->fidp == NULL) { |
1912 |
err = -EINVAL; |
1913 |
goto out;
|
1914 |
} |
1915 |
|
1916 |
err = v9fs_do_remove(s, &vs->fidp->path); |
1917 |
v9fs_remove_post_remove(s, vs, err); |
1918 |
return;
|
1919 |
|
1920 |
out:
|
1921 |
complete_pdu(s, pdu, err); |
1922 |
qemu_free(vs); |
1923 |
} |
1924 |
|
1925 |
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
1926 |
{ |
1927 |
if (err < 0) { |
1928 |
goto out;
|
1929 |
} |
1930 |
|
1931 |
err = vs->offset; |
1932 |
|
1933 |
out:
|
1934 |
v9fs_stat_free(&vs->v9stat); |
1935 |
complete_pdu(s, vs->pdu, err); |
1936 |
qemu_free(vs); |
1937 |
} |
1938 |
|
1939 |
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) |
1940 |
{ |
1941 |
if (err < 0) { |
1942 |
goto out;
|
1943 |
} |
1944 |
|
1945 |
if (vs->v9stat.name.size != 0) { |
1946 |
v9fs_string_free(&vs->nname); |
1947 |
} |
1948 |
|
1949 |
if (vs->v9stat.length != -1) { |
1950 |
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { |
1951 |
err = -errno; |
1952 |
} |
1953 |
} |
1954 |
v9fs_wstat_post_truncate(s, vs, err); |
1955 |
return;
|
1956 |
|
1957 |
out:
|
1958 |
v9fs_stat_free(&vs->v9stat); |
1959 |
complete_pdu(s, vs->pdu, err); |
1960 |
qemu_free(vs); |
1961 |
} |
1962 |
|
1963 |
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
1964 |
{ |
1965 |
V9fsFidState *fidp; |
1966 |
if (err < 0) { |
1967 |
goto out;
|
1968 |
} |
1969 |
|
1970 |
if (vs->v9stat.name.size != 0) { |
1971 |
char *old_name, *new_name;
|
1972 |
char *end;
|
1973 |
|
1974 |
old_name = vs->fidp->path.data; |
1975 |
end = strrchr(old_name, '/');
|
1976 |
if (end) {
|
1977 |
end++; |
1978 |
} else {
|
1979 |
end = old_name; |
1980 |
} |
1981 |
|
1982 |
new_name = qemu_malloc(end - old_name + vs->v9stat.name.size + 1);
|
1983 |
|
1984 |
memset(new_name, 0, end - old_name + vs->v9stat.name.size + 1); |
1985 |
memcpy(new_name, old_name, end - old_name); |
1986 |
memcpy(new_name + (end - old_name), vs->v9stat.name.data, |
1987 |
vs->v9stat.name.size); |
1988 |
vs->nname.data = new_name; |
1989 |
vs->nname.size = strlen(new_name); |
1990 |
|
1991 |
if (strcmp(new_name, vs->fidp->path.data) != 0) { |
1992 |
if (v9fs_do_rename(s, &vs->fidp->path, &vs->nname)) {
|
1993 |
err = -errno; |
1994 |
} else {
|
1995 |
/*
|
1996 |
* Fixup fid's pointing to the old name to
|
1997 |
* start pointing to the new name
|
1998 |
*/
|
1999 |
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
2000 |
|
2001 |
if (vs->fidp == fidp) {
|
2002 |
/*
|
2003 |
* we replace name of this fid towards the end
|
2004 |
* so that our below strcmp will work
|
2005 |
*/
|
2006 |
continue;
|
2007 |
} |
2008 |
if (!strncmp(vs->fidp->path.data, fidp->path.data,
|
2009 |
strlen(vs->fidp->path.data))) { |
2010 |
/* replace the name */
|
2011 |
v9fs_fix_path(&fidp->path, &vs->nname, |
2012 |
strlen(vs->fidp->path.data)); |
2013 |
} |
2014 |
} |
2015 |
v9fs_string_copy(&vs->fidp->path, &vs->nname); |
2016 |
} |
2017 |
} |
2018 |
} |
2019 |
v9fs_wstat_post_rename(s, vs, err); |
2020 |
return;
|
2021 |
|
2022 |
out:
|
2023 |
v9fs_stat_free(&vs->v9stat); |
2024 |
complete_pdu(s, vs->pdu, err); |
2025 |
qemu_free(vs); |
2026 |
} |
2027 |
|
2028 |
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2029 |
{ |
2030 |
if (err < 0) { |
2031 |
goto out;
|
2032 |
} |
2033 |
|
2034 |
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
2035 |
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
2036 |
vs->v9stat.n_gid)) { |
2037 |
err = -errno; |
2038 |
} |
2039 |
} |
2040 |
v9fs_wstat_post_chown(s, vs, err); |
2041 |
return;
|
2042 |
|
2043 |
out:
|
2044 |
v9fs_stat_free(&vs->v9stat); |
2045 |
complete_pdu(s, vs->pdu, err); |
2046 |
qemu_free(vs); |
2047 |
} |
2048 |
|
2049 |
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) |
2050 |
{ |
2051 |
if (err < 0) { |
2052 |
goto out;
|
2053 |
} |
2054 |
|
2055 |
if (vs->v9stat.mtime != -1) { |
2056 |
struct utimbuf tb;
|
2057 |
tb.actime = 0;
|
2058 |
tb.modtime = vs->v9stat.mtime; |
2059 |
if (v9fs_do_utime(s, &vs->fidp->path, &tb)) {
|
2060 |
err = -errno; |
2061 |
} |
2062 |
} |
2063 |
|
2064 |
v9fs_wstat_post_utime(s, vs, err); |
2065 |
return;
|
2066 |
|
2067 |
out:
|
2068 |
v9fs_stat_free(&vs->v9stat); |
2069 |
complete_pdu(s, vs->pdu, err); |
2070 |
qemu_free(vs); |
2071 |
} |
2072 |
|
2073 |
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) |
2074 |
{ |
2075 |
if (err == -1) { |
2076 |
err = -errno; |
2077 |
} |
2078 |
v9fs_stat_free(&vs->v9stat); |
2079 |
complete_pdu(s, vs->pdu, err); |
2080 |
qemu_free(vs); |
2081 |
} |
2082 |
|
2083 |
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) |
2084 |
{ |
2085 |
uint32_t v9_mode; |
2086 |
|
2087 |
if (err == -1) { |
2088 |
err = -errno; |
2089 |
goto out;
|
2090 |
} |
2091 |
|
2092 |
v9_mode = stat_to_v9mode(&vs->stbuf); |
2093 |
|
2094 |
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
2095 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) { |
2096 |
/* Attempting to change the type */
|
2097 |
err = -EIO; |
2098 |
goto out;
|
2099 |
} |
2100 |
|
2101 |
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
2102 |
&vs->v9stat.extension))) { |
2103 |
err = -errno; |
2104 |
} |
2105 |
v9fs_wstat_post_chmod(s, vs, err); |
2106 |
return;
|
2107 |
|
2108 |
out:
|
2109 |
v9fs_stat_free(&vs->v9stat); |
2110 |
complete_pdu(s, vs->pdu, err); |
2111 |
qemu_free(vs); |
2112 |
} |
2113 |
|
2114 |
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
2115 |
{ |
2116 |
int32_t fid; |
2117 |
V9fsWstatState *vs; |
2118 |
int err = 0; |
2119 |
|
2120 |
vs = qemu_malloc(sizeof(*vs));
|
2121 |
vs->pdu = pdu; |
2122 |
vs->offset = 7;
|
2123 |
|
2124 |
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
2125 |
|
2126 |
vs->fidp = lookup_fid(s, fid); |
2127 |
if (vs->fidp == NULL) { |
2128 |
err = -EINVAL; |
2129 |
goto out;
|
2130 |
} |
2131 |
|
2132 |
/* do we need to sync the file? */
|
2133 |
if (donttouch_stat(&vs->v9stat)) {
|
2134 |
err = v9fs_do_fsync(s, vs->fidp->fd); |
2135 |
v9fs_wstat_post_fsync(s, vs, err); |
2136 |
return;
|
2137 |
} |
2138 |
|
2139 |
if (vs->v9stat.mode != -1) { |
2140 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
2141 |
v9fs_wstat_post_lstat(s, vs, err); |
2142 |
return;
|
2143 |
} |
2144 |
|
2145 |
v9fs_wstat_post_chmod(s, vs, err); |
2146 |
return;
|
2147 |
|
2148 |
out:
|
2149 |
v9fs_stat_free(&vs->v9stat); |
2150 |
complete_pdu(s, vs->pdu, err); |
2151 |
qemu_free(vs); |
2152 |
} |
2153 |
|
2154 |
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
2155 |
|
2156 |
static pdu_handler_t *pdu_handlers[] = {
|
2157 |
[P9_TVERSION] = v9fs_version, |
2158 |
[P9_TATTACH] = v9fs_attach, |
2159 |
[P9_TSTAT] = v9fs_stat, |
2160 |
[P9_TWALK] = v9fs_walk, |
2161 |
[P9_TCLUNK] = v9fs_clunk, |
2162 |
[P9_TOPEN] = v9fs_open, |
2163 |
[P9_TREAD] = v9fs_read, |
2164 |
#if 0
|
2165 |
[P9_TAUTH] = v9fs_auth,
|
2166 |
#endif
|
2167 |
[P9_TFLUSH] = v9fs_flush, |
2168 |
[P9_TCREATE] = v9fs_create, |
2169 |
[P9_TWRITE] = v9fs_write, |
2170 |
[P9_TWSTAT] = v9fs_wstat, |
2171 |
[P9_TREMOVE] = v9fs_remove, |
2172 |
}; |
2173 |
|
2174 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
2175 |
{ |
2176 |
pdu_handler_t *handler; |
2177 |
|
2178 |
if (debug_9p_pdu) {
|
2179 |
pprint_pdu(pdu); |
2180 |
} |
2181 |
|
2182 |
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); |
2183 |
|
2184 |
handler = pdu_handlers[pdu->id]; |
2185 |
BUG_ON(handler == NULL);
|
2186 |
|
2187 |
handler(s, pdu); |
2188 |
} |
2189 |
|
2190 |
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
2191 |
{ |
2192 |
V9fsState *s = (V9fsState *)vdev; |
2193 |
V9fsPDU *pdu; |
2194 |
ssize_t len; |
2195 |
|
2196 |
while ((pdu = alloc_pdu(s)) &&
|
2197 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
2198 |
uint8_t *ptr; |
2199 |
|
2200 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
2201 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
2202 |
|
2203 |
ptr = pdu->elem.out_sg[0].iov_base;
|
2204 |
|
2205 |
memcpy(&pdu->size, ptr, 4);
|
2206 |
pdu->id = ptr[4];
|
2207 |
memcpy(&pdu->tag, ptr + 5, 2); |
2208 |
|
2209 |
submit_pdu(s, pdu); |
2210 |
} |
2211 |
|
2212 |
free_pdu(s, pdu); |
2213 |
} |
2214 |
|
2215 |
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
2216 |
{ |
2217 |
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
2218 |
return features;
|
2219 |
} |
2220 |
|
2221 |
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
2222 |
{ |
2223 |
return (V9fsState *)vdev;
|
2224 |
} |
2225 |
|
2226 |
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) |
2227 |
{ |
2228 |
struct virtio_9p_config *cfg;
|
2229 |
V9fsState *s = to_virtio_9p(vdev); |
2230 |
|
2231 |
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + |
2232 |
s->tag_len); |
2233 |
stw_raw(&cfg->tag_len, s->tag_len); |
2234 |
memcpy(cfg->tag, s->tag, s->tag_len); |
2235 |
memcpy(config, cfg, s->config_size); |
2236 |
qemu_free(cfg); |
2237 |
} |
2238 |
|
2239 |
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) |
2240 |
{ |
2241 |
V9fsState *s; |
2242 |
int i, len;
|
2243 |
struct stat stat;
|
2244 |
FsTypeEntry *fse; |
2245 |
|
2246 |
|
2247 |
s = (V9fsState *)virtio_common_init("virtio-9p",
|
2248 |
VIRTIO_ID_9P, |
2249 |
sizeof(struct virtio_9p_config)+ |
2250 |
MAX_TAG_LEN, |
2251 |
sizeof(V9fsState));
|
2252 |
|
2253 |
/* initialize pdu allocator */
|
2254 |
QLIST_INIT(&s->free_list); |
2255 |
for (i = 0; i < (MAX_REQ - 1); i++) { |
2256 |
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
2257 |
} |
2258 |
|
2259 |
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); |
2260 |
|
2261 |
fse = get_fsdev_fsentry(conf->fsdev_id); |
2262 |
|
2263 |
if (!fse) {
|
2264 |
/* We don't have a fsdev identified by fsdev_id */
|
2265 |
fprintf(stderr, "Virtio-9p device couldn't find fsdev "
|
2266 |
"with the id %s\n", conf->fsdev_id);
|
2267 |
exit(1);
|
2268 |
} |
2269 |
|
2270 |
if (!fse->path || !conf->tag) {
|
2271 |
/* we haven't specified a mount_tag or the path */
|
2272 |
fprintf(stderr, "fsdev with id %s needs path "
|
2273 |
"and Virtio-9p device needs mount_tag arguments\n",
|
2274 |
conf->fsdev_id); |
2275 |
exit(1);
|
2276 |
} |
2277 |
|
2278 |
if (!strcmp(fse->security_model, "passthrough")) { |
2279 |
/* Files on the Fileserver set to client user credentials */
|
2280 |
s->ctx.fs_sm = SM_PASSTHROUGH; |
2281 |
} else if (!strcmp(fse->security_model, "mapped")) { |
2282 |
/* Files on the fileserver are set to QEMU credentials.
|
2283 |
* Client user credentials are saved in extended attributes.
|
2284 |
*/
|
2285 |
s->ctx.fs_sm = SM_MAPPED; |
2286 |
} else {
|
2287 |
/* user haven't specified a correct security option */
|
2288 |
fprintf(stderr, "one of the following must be specified as the"
|
2289 |
"security option:\n\t security_model=passthrough \n\t "
|
2290 |
"security_model=mapped\n");
|
2291 |
return NULL; |
2292 |
} |
2293 |
|
2294 |
if (lstat(fse->path, &stat)) {
|
2295 |
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
2296 |
exit(1);
|
2297 |
} else if (!S_ISDIR(stat.st_mode)) { |
2298 |
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
2299 |
exit(1);
|
2300 |
} |
2301 |
|
2302 |
s->ctx.fs_root = qemu_strdup(fse->path); |
2303 |
len = strlen(conf->tag); |
2304 |
if (len > MAX_TAG_LEN) {
|
2305 |
len = MAX_TAG_LEN; |
2306 |
} |
2307 |
/* s->tag is non-NULL terminated string */
|
2308 |
s->tag = qemu_malloc(len); |
2309 |
memcpy(s->tag, conf->tag, len); |
2310 |
s->tag_len = len; |
2311 |
s->ctx.uid = -1;
|
2312 |
|
2313 |
s->ops = fse->ops; |
2314 |
s->vdev.get_features = virtio_9p_get_features; |
2315 |
s->config_size = sizeof(struct virtio_9p_config) + |
2316 |
s->tag_len; |
2317 |
s->vdev.get_config = virtio_9p_get_config; |
2318 |
|
2319 |
return &s->vdev;
|
2320 |
} |