| 1 | /* |
| 2 | * 9p synthetic file system support |
| 3 | * |
| 4 | * Copyright IBM, Corp. 2011 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Malahal Naineni <malahal@us.ibm.com> |
| 8 | * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> |
| 9 | * |
| 10 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 11 | * the COPYING file in the top-level directory. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | /* |
| 16 | * Not so fast! You might want to read the 9p developer docs first: |
| 17 | * https://wiki.qemu.org/Documentation/9p |
| 18 | */ |
| 19 | |
| 20 | #include "qemu/osdep.h" |
| 21 | #include "9p.h" |
| 22 | #include "fsdev/qemu-fsdev.h" |
| 23 | #include "9p-synth.h" |
| 24 | #include "qemu/rcu.h" |
| 25 | #include "qemu/rcu_queue.h" |
| 26 | #include "qemu/cutils.h" |
| 27 | #include "system/qtest.h" |
| 28 | #include "qapi/error.h" |
| 29 | #include "qemu/option.h" |
| 30 | |
| 31 | /* Root node for synth file system */ |
| 32 | static V9fsSynthNode synth_root = { |
| 33 | .name = "/", |
| 34 | .actual_attr = { |
| 35 | .mode = 0555 | S_IFDIR, |
| 36 | .nlink = 1, |
| 37 | }, |
| 38 | .attr = &synth_root.actual_attr, |
| 39 | }; |
| 40 | |
| 41 | static QemuMutex synth_mutex; |
| 42 | static int synth_node_count; |
| 43 | /* set to 1 when the synth fs is ready */ |
| 44 | static int synth_fs; |
| 45 | |
| 46 | static V9fsSynthNode *v9fs_add_dir_node(V9fsSynthNode *parent, int mode, |
| 47 | const char *name, |
| 48 | V9fsSynthNodeAttr *attr, int inode) |
| 49 | { |
| 50 | V9fsSynthNode *node; |
| 51 | |
| 52 | /* Add directory type and remove write bits */ |
| 53 | mode = ((mode & 0777) | S_IFDIR) & ~(S_IWUSR | S_IWGRP | S_IWOTH); |
| 54 | node = g_new0(V9fsSynthNode, 1); |
| 55 | if (attr) { |
| 56 | /* We are adding .. or . entries */ |
| 57 | node->attr = attr; |
| 58 | node->attr->nlink++; |
| 59 | } else { |
| 60 | node->attr = &node->actual_attr; |
| 61 | node->attr->inode = inode; |
| 62 | node->attr->nlink = 1; |
| 63 | /* We don't allow write to directories */ |
| 64 | node->attr->mode = mode; |
| 65 | node->attr->write = NULL; |
| 66 | node->attr->read = NULL; |
| 67 | } |
| 68 | node->private = node; |
| 69 | pstrcpy(node->name, sizeof(node->name), name); |
| 70 | QLIST_INSERT_HEAD_RCU(&parent->child, node, sibling); |
| 71 | return node; |
| 72 | } |
| 73 | |
| 74 | int qemu_v9fs_synth_mkdir(V9fsSynthNode *parent, int mode, |
| 75 | const char *name, V9fsSynthNode **result) |
| 76 | { |
| 77 | V9fsSynthNode *node, *tmp; |
| 78 | |
| 79 | if (!synth_fs) { |
| 80 | return -EAGAIN; |
| 81 | } |
| 82 | if (!name || (strlen(name) >= NAME_MAX)) { |
| 83 | return -EINVAL; |
| 84 | } |
| 85 | if (!parent) { |
| 86 | parent = &synth_root; |
| 87 | } |
| 88 | QEMU_LOCK_GUARD(&synth_mutex); |
| 89 | QLIST_FOREACH(tmp, &parent->child, sibling) { |
| 90 | if (!strcmp(tmp->name, name)) { |
| 91 | return -EEXIST; |
| 92 | } |
| 93 | } |
| 94 | /* Add the name */ |
| 95 | node = v9fs_add_dir_node(parent, mode, name, NULL, ++synth_node_count); |
| 96 | v9fs_add_dir_node(node, parent->attr->mode, "..", |
| 97 | parent->attr, parent->attr->inode); |
| 98 | v9fs_add_dir_node(node, node->attr->mode, ".", |
| 99 | node->attr, node->attr->inode); |
| 100 | *result = node; |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | int qemu_v9fs_synth_add_file(V9fsSynthNode *parent, int mode, |
| 105 | const char *name, v9fs_synth_read read, |
| 106 | v9fs_synth_write write, void *arg) |
| 107 | { |
| 108 | V9fsSynthNode *node, *tmp; |
| 109 | |
| 110 | if (!synth_fs) { |
| 111 | return -EAGAIN; |
| 112 | } |
| 113 | if (!name || (strlen(name) >= NAME_MAX)) { |
| 114 | return -EINVAL; |
| 115 | } |
| 116 | if (!parent) { |
| 117 | parent = &synth_root; |
| 118 | } |
| 119 | |
| 120 | QEMU_LOCK_GUARD(&synth_mutex); |
| 121 | QLIST_FOREACH(tmp, &parent->child, sibling) { |
| 122 | if (!strcmp(tmp->name, name)) { |
| 123 | return -EEXIST; |
| 124 | } |
| 125 | } |
| 126 | /* Add file type and remove write bits */ |
| 127 | mode = ((mode & 0777) | S_IFREG); |
| 128 | node = g_new0(V9fsSynthNode, 1); |
| 129 | node->attr = &node->actual_attr; |
| 130 | node->attr->inode = ++synth_node_count; |
| 131 | node->attr->nlink = 1; |
| 132 | node->attr->read = read; |
| 133 | node->attr->write = write; |
| 134 | node->attr->mode = mode; |
| 135 | node->private = arg; |
| 136 | pstrcpy(node->name, sizeof(node->name), name); |
| 137 | QLIST_INSERT_HEAD_RCU(&parent->child, node, sibling); |
| 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | static void synth_fill_statbuf(V9fsSynthNode *node, struct stat *stbuf) |
| 142 | { |
| 143 | stbuf->st_dev = 0; |
| 144 | stbuf->st_ino = node->attr->inode; |
| 145 | stbuf->st_mode = node->attr->mode; |
| 146 | stbuf->st_nlink = node->attr->nlink; |
| 147 | stbuf->st_uid = 0; |
| 148 | stbuf->st_gid = 0; |
| 149 | stbuf->st_rdev = 0; |
| 150 | stbuf->st_size = 0; |
| 151 | stbuf->st_blksize = 0; |
| 152 | stbuf->st_blocks = 0; |
| 153 | stbuf->st_atime = 0; |
| 154 | stbuf->st_mtime = 0; |
| 155 | stbuf->st_ctime = 0; |
| 156 | } |
| 157 | |
| 158 | static int synth_lstat(FsContext *fs_ctx, |
| 159 | V9fsPath *fs_path, struct stat *stbuf) |
| 160 | { |
| 161 | V9fsSynthNode *node = *(V9fsSynthNode **)fs_path->data; |
| 162 | |
| 163 | synth_fill_statbuf(node, stbuf); |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static int synth_fstat(FsContext *fs_ctx, int fid_type, |
| 168 | V9fsFidOpenState *fs, struct stat *stbuf) |
| 169 | { |
| 170 | V9fsSynthOpenState *synth_open = fs->private; |
| 171 | synth_fill_statbuf(synth_open->node, stbuf); |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | static int synth_opendir(FsContext *ctx, |
| 176 | V9fsPath *fs_path, V9fsFidOpenState *fs) |
| 177 | { |
| 178 | V9fsSynthOpenState *synth_open; |
| 179 | V9fsSynthNode *node = *(V9fsSynthNode **)fs_path->data; |
| 180 | |
| 181 | /* |
| 182 | * V9fsSynthOpenState contains 'struct dirent' which have OS-specific |
| 183 | * properties, thus it's zero cleared on allocation here and below |
| 184 | * in synth_open. |
| 185 | */ |
| 186 | synth_open = g_new0(V9fsSynthOpenState, 1); |
| 187 | synth_open->node = node; |
| 188 | node->open_count++; |
| 189 | fs->private = synth_open; |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static int synth_closedir(FsContext *ctx, V9fsFidOpenState *fs) |
| 194 | { |
| 195 | V9fsSynthOpenState *synth_open = fs->private; |
| 196 | V9fsSynthNode *node = synth_open->node; |
| 197 | |
| 198 | node->open_count--; |
| 199 | g_free(synth_open); |
| 200 | fs->private = NULL; |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | static off_t synth_telldir(FsContext *ctx, V9fsFidOpenState *fs) |
| 205 | { |
| 206 | V9fsSynthOpenState *synth_open = fs->private; |
| 207 | return synth_open->offset; |
| 208 | } |
| 209 | |
| 210 | static void synth_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off) |
| 211 | { |
| 212 | V9fsSynthOpenState *synth_open = fs->private; |
| 213 | synth_open->offset = off; |
| 214 | } |
| 215 | |
| 216 | static void synth_rewinddir(FsContext *ctx, V9fsFidOpenState *fs) |
| 217 | { |
| 218 | synth_seekdir(ctx, fs, 0); |
| 219 | } |
| 220 | |
| 221 | static void synth_direntry(V9fsSynthNode *node, |
| 222 | struct dirent *entry, off_t off) |
| 223 | { |
| 224 | size_t sz = strlen(node->name) + 1; |
| 225 | /* |
| 226 | * 'entry' is always inside of V9fsSynthOpenState which have NAME_MAX |
| 227 | * back padding. Ensure we do not overflow it. |
| 228 | */ |
| 229 | g_assert(sizeof(struct dirent) + NAME_MAX >= |
| 230 | offsetof(struct dirent, d_name) + sz); |
| 231 | memcpy(entry->d_name, node->name, sz); |
| 232 | entry->d_ino = node->attr->inode; |
| 233 | #ifdef CONFIG_DARWIN |
| 234 | entry->d_seekoff = off + 1; |
| 235 | #else |
| 236 | entry->d_off = off + 1; |
| 237 | #endif |
| 238 | } |
| 239 | |
| 240 | static struct dirent *synth_get_dentry(V9fsSynthNode *dir, |
| 241 | struct dirent *entry, off_t off) |
| 242 | { |
| 243 | int i = 0; |
| 244 | V9fsSynthNode *node; |
| 245 | |
| 246 | rcu_read_lock(); |
| 247 | QLIST_FOREACH(node, &dir->child, sibling) { |
| 248 | /* This is the off child of the directory */ |
| 249 | if (i == off) { |
| 250 | break; |
| 251 | } |
| 252 | i++; |
| 253 | } |
| 254 | rcu_read_unlock(); |
| 255 | if (!node) { |
| 256 | /* end of directory */ |
| 257 | return NULL; |
| 258 | } |
| 259 | synth_direntry(node, entry, off); |
| 260 | return entry; |
| 261 | } |
| 262 | |
| 263 | static struct dirent *synth_readdir(FsContext *ctx, V9fsFidOpenState *fs) |
| 264 | { |
| 265 | struct dirent *entry; |
| 266 | V9fsSynthOpenState *synth_open = fs->private; |
| 267 | V9fsSynthNode *node = synth_open->node; |
| 268 | entry = synth_get_dentry(node, &synth_open->dent, synth_open->offset); |
| 269 | if (entry) { |
| 270 | synth_open->offset++; |
| 271 | } |
| 272 | return entry; |
| 273 | } |
| 274 | |
| 275 | static int synth_open(FsContext *ctx, V9fsPath *fs_path, |
| 276 | int flags, V9fsFidOpenState *fs) |
| 277 | { |
| 278 | V9fsSynthOpenState *synth_open; |
| 279 | V9fsSynthNode *node = *(V9fsSynthNode **)fs_path->data; |
| 280 | |
| 281 | synth_open = g_new0(V9fsSynthOpenState, 1); |
| 282 | synth_open->node = node; |
| 283 | node->open_count++; |
| 284 | fs->private = synth_open; |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | static int synth_open2(FsContext *fs_ctx, V9fsPath *dir_path, |
| 289 | const char *name, int flags, |
| 290 | FsCred *credp, V9fsFidOpenState *fs) |
| 291 | { |
| 292 | errno = ENOSYS; |
| 293 | return -1; |
| 294 | } |
| 295 | |
| 296 | static int synth_close(FsContext *ctx, V9fsFidOpenState *fs) |
| 297 | { |
| 298 | V9fsSynthOpenState *synth_open = fs->private; |
| 299 | V9fsSynthNode *node = synth_open->node; |
| 300 | |
| 301 | node->open_count--; |
| 302 | g_free(synth_open); |
| 303 | fs->private = NULL; |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | static ssize_t synth_pwritev(FsContext *ctx, V9fsFidOpenState *fs, |
| 308 | const struct iovec *iov, |
| 309 | int iovcnt, off_t offset) |
| 310 | { |
| 311 | int i, count = 0, wcount; |
| 312 | V9fsSynthOpenState *synth_open = fs->private; |
| 313 | V9fsSynthNode *node = synth_open->node; |
| 314 | if (!node->attr->write) { |
| 315 | errno = EPERM; |
| 316 | return -1; |
| 317 | } |
| 318 | for (i = 0; i < iovcnt; i++) { |
| 319 | wcount = node->attr->write(iov[i].iov_base, iov[i].iov_len, |
| 320 | offset, node->private); |
| 321 | offset += wcount; |
| 322 | count += wcount; |
| 323 | /* If we wrote less than requested. we are done */ |
| 324 | if (wcount < iov[i].iov_len) { |
| 325 | break; |
| 326 | } |
| 327 | } |
| 328 | return count; |
| 329 | } |
| 330 | |
| 331 | static ssize_t synth_preadv(FsContext *ctx, V9fsFidOpenState *fs, |
| 332 | const struct iovec *iov, |
| 333 | int iovcnt, off_t offset) |
| 334 | { |
| 335 | int i, count = 0, rcount; |
| 336 | V9fsSynthOpenState *synth_open = fs->private; |
| 337 | V9fsSynthNode *node = synth_open->node; |
| 338 | if (!node->attr->read) { |
| 339 | errno = EPERM; |
| 340 | return -1; |
| 341 | } |
| 342 | for (i = 0; i < iovcnt; i++) { |
| 343 | rcount = node->attr->read(iov[i].iov_base, iov[i].iov_len, |
| 344 | offset, node->private); |
| 345 | offset += rcount; |
| 346 | count += rcount; |
| 347 | /* If we read less than requested. we are done */ |
| 348 | if (rcount < iov[i].iov_len) { |
| 349 | break; |
| 350 | } |
| 351 | } |
| 352 | return count; |
| 353 | } |
| 354 | |
| 355 | static int synth_truncate(FsContext *ctx, V9fsPath *path, off_t offset) |
| 356 | { |
| 357 | errno = ENOSYS; |
| 358 | return -1; |
| 359 | } |
| 360 | |
| 361 | static int synth_ftruncate(FsContext *ctx, int fid_type, V9fsFidOpenState *fs, |
| 362 | off_t size) |
| 363 | { |
| 364 | errno = ENOSYS; |
| 365 | return -1; |
| 366 | } |
| 367 | |
| 368 | static int synth_chmod(FsContext *fs_ctx, V9fsPath *path, FsCred *credp) |
| 369 | { |
| 370 | errno = EPERM; |
| 371 | return -1; |
| 372 | } |
| 373 | |
| 374 | static int synth_mknod(FsContext *fs_ctx, V9fsPath *path, |
| 375 | const char *buf, FsCred *credp) |
| 376 | { |
| 377 | errno = EPERM; |
| 378 | return -1; |
| 379 | } |
| 380 | |
| 381 | static int synth_mkdir(FsContext *fs_ctx, V9fsPath *path, |
| 382 | const char *buf, FsCred *credp) |
| 383 | { |
| 384 | errno = EPERM; |
| 385 | return -1; |
| 386 | } |
| 387 | |
| 388 | static ssize_t synth_readlink(FsContext *fs_ctx, V9fsPath *path, |
| 389 | char *buf, size_t bufsz) |
| 390 | { |
| 391 | errno = ENOSYS; |
| 392 | return -1; |
| 393 | } |
| 394 | |
| 395 | static int synth_symlink(FsContext *fs_ctx, const char *oldpath, |
| 396 | V9fsPath *newpath, const char *buf, FsCred *credp) |
| 397 | { |
| 398 | errno = EPERM; |
| 399 | return -1; |
| 400 | } |
| 401 | |
| 402 | static int synth_link(FsContext *fs_ctx, V9fsPath *oldpath, |
| 403 | V9fsPath *newpath, const char *buf) |
| 404 | { |
| 405 | errno = EPERM; |
| 406 | return -1; |
| 407 | } |
| 408 | |
| 409 | static int synth_rename(FsContext *ctx, const char *oldpath, |
| 410 | const char *newpath) |
| 411 | { |
| 412 | errno = EPERM; |
| 413 | return -1; |
| 414 | } |
| 415 | |
| 416 | static int synth_chown(FsContext *fs_ctx, V9fsPath *path, FsCred *credp) |
| 417 | { |
| 418 | errno = EPERM; |
| 419 | return -1; |
| 420 | } |
| 421 | |
| 422 | static int synth_utimensat(FsContext *fs_ctx, V9fsPath *path, |
| 423 | const struct timespec *buf) |
| 424 | { |
| 425 | errno = EPERM; |
| 426 | return 0; |
| 427 | } |
| 428 | |
| 429 | static int synth_futimens(FsContext *fs_ctx, int fid_type, V9fsFidOpenState *fs, |
| 430 | const struct timespec *buf) |
| 431 | { |
| 432 | errno = ENOSYS; |
| 433 | return -1; |
| 434 | } |
| 435 | |
| 436 | static int synth_remove(FsContext *ctx, const char *path) |
| 437 | { |
| 438 | errno = EPERM; |
| 439 | return -1; |
| 440 | } |
| 441 | |
| 442 | static int synth_fsync(FsContext *ctx, int fid_type, |
| 443 | V9fsFidOpenState *fs, int datasync) |
| 444 | { |
| 445 | errno = ENOSYS; |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | static int synth_statfs(FsContext *s, V9fsPath *fs_path, |
| 450 | struct statfs *stbuf) |
| 451 | { |
| 452 | stbuf->f_type = 0xABCD; |
| 453 | stbuf->f_bsize = 512; |
| 454 | stbuf->f_blocks = 0; |
| 455 | stbuf->f_files = synth_node_count; |
| 456 | #if !defined(CONFIG_DARWIN) && !defined(CONFIG_FREEBSD) |
| 457 | stbuf->f_namelen = NAME_MAX; |
| 458 | #endif |
| 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | static ssize_t synth_lgetxattr(FsContext *ctx, V9fsPath *path, |
| 463 | const char *name, void *value, size_t size) |
| 464 | { |
| 465 | errno = ENOTSUP; |
| 466 | return -1; |
| 467 | } |
| 468 | |
| 469 | static ssize_t synth_llistxattr(FsContext *ctx, V9fsPath *path, |
| 470 | void *value, size_t size) |
| 471 | { |
| 472 | errno = ENOTSUP; |
| 473 | return -1; |
| 474 | } |
| 475 | |
| 476 | static int synth_lsetxattr(FsContext *ctx, V9fsPath *path, |
| 477 | const char *name, void *value, |
| 478 | size_t size, int flags) |
| 479 | { |
| 480 | /* pretend it worked */ |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | static int synth_lremovexattr(FsContext *ctx, |
| 485 | V9fsPath *path, const char *name) |
| 486 | { |
| 487 | /* pretend it worked */ |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static int synth_name_to_path(FsContext *ctx, V9fsPath *dir_path, |
| 492 | const char *name, V9fsPath *target) |
| 493 | { |
| 494 | V9fsSynthNode *node; |
| 495 | V9fsSynthNode *dir_node; |
| 496 | |
| 497 | /* "." and ".." are not allowed */ |
| 498 | if (!strcmp(name, ".") || !strcmp(name, "..")) { |
| 499 | errno = EINVAL; |
| 500 | return -1; |
| 501 | |
| 502 | } |
| 503 | if (!dir_path) { |
| 504 | dir_node = &synth_root; |
| 505 | } else { |
| 506 | dir_node = *(V9fsSynthNode **)dir_path->data; |
| 507 | } |
| 508 | if (!strcmp(name, "/")) { |
| 509 | node = dir_node; |
| 510 | goto out; |
| 511 | } |
| 512 | /* search for the name in the children */ |
| 513 | rcu_read_lock(); |
| 514 | QLIST_FOREACH(node, &dir_node->child, sibling) { |
| 515 | if (!strcmp(node->name, name)) { |
| 516 | break; |
| 517 | } |
| 518 | } |
| 519 | rcu_read_unlock(); |
| 520 | |
| 521 | if (!node) { |
| 522 | errno = ENOENT; |
| 523 | return -1; |
| 524 | } |
| 525 | out: |
| 526 | /* Copy the node pointer to fid */ |
| 527 | g_free(target->data); |
| 528 | target->data = g_memdup(&node, sizeof(void *)); |
| 529 | target->size = sizeof(void *); |
| 530 | return 0; |
| 531 | } |
| 532 | |
| 533 | static int synth_renameat(FsContext *ctx, V9fsPath *olddir, |
| 534 | const char *old_name, V9fsPath *newdir, |
| 535 | const char *new_name) |
| 536 | { |
| 537 | errno = EPERM; |
| 538 | return -1; |
| 539 | } |
| 540 | |
| 541 | static int synth_unlinkat(FsContext *ctx, V9fsPath *dir, |
| 542 | const char *name, int flags) |
| 543 | { |
| 544 | errno = EPERM; |
| 545 | return -1; |
| 546 | } |
| 547 | |
| 548 | static ssize_t v9fs_synth_qtest_write(void *buf, int len, off_t offset, |
| 549 | void *arg) |
| 550 | { |
| 551 | return 1; |
| 552 | } |
| 553 | |
| 554 | static ssize_t v9fs_synth_qtest_flush_write(void *buf, int len, off_t offset, |
| 555 | void *arg) |
| 556 | { |
| 557 | bool should_block = !!*(uint8_t *)buf; |
| 558 | |
| 559 | if (should_block) { |
| 560 | /* This will cause the server to call us again until we're cancelled */ |
| 561 | errno = EINTR; |
| 562 | return -1; |
| 563 | } |
| 564 | |
| 565 | return 1; |
| 566 | } |
| 567 | |
| 568 | /* transmits internal xattr counter to client */ |
| 569 | static ssize_t v9fs_synth_read_xattr_count(void *buf, int len, off_t offset, |
| 570 | void *arg) |
| 571 | { |
| 572 | FsContext *ctx = arg; |
| 573 | size_t local_count = ctx->xattr_fid_count; |
| 574 | if (len < (int)sizeof(size_t)) { |
| 575 | return -ENOSPC; |
| 576 | } |
| 577 | memcpy(buf, &local_count, sizeof(size_t)); |
| 578 | return sizeof(size_t); |
| 579 | } |
| 580 | |
| 581 | static int synth_init(FsContext *ctx, Error **errp) |
| 582 | { |
| 583 | QLIST_INIT(&synth_root.child); |
| 584 | qemu_mutex_init(&synth_mutex); |
| 585 | |
| 586 | /* Add "." and ".." entries for root */ |
| 587 | v9fs_add_dir_node(&synth_root, synth_root.attr->mode, |
| 588 | "..", synth_root.attr, synth_root.attr->inode); |
| 589 | v9fs_add_dir_node(&synth_root, synth_root.attr->mode, |
| 590 | ".", synth_root.attr, synth_root.attr->inode); |
| 591 | |
| 592 | /* Mark the subsystem is ready for use */ |
| 593 | synth_fs = 1; |
| 594 | |
| 595 | if (qtest_enabled()) { |
| 596 | V9fsSynthNode *node = NULL; |
| 597 | int i, ret; |
| 598 | |
| 599 | /* Directory hierarchy for WALK test */ |
| 600 | for (i = 0; i < P9_MAXWELEM; i++) { |
| 601 | char *name = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i); |
| 602 | |
| 603 | ret = qemu_v9fs_synth_mkdir(node, 0700, name, &node); |
| 604 | assert(!ret); |
| 605 | g_free(name); |
| 606 | } |
| 607 | |
| 608 | /* File for LOPEN test */ |
| 609 | ret = qemu_v9fs_synth_add_file(NULL, 0, QTEST_V9FS_SYNTH_LOPEN_FILE, |
| 610 | NULL, NULL, ctx); |
| 611 | assert(!ret); |
| 612 | |
| 613 | /* File for WRITE test */ |
| 614 | ret = qemu_v9fs_synth_add_file(NULL, 0, QTEST_V9FS_SYNTH_WRITE_FILE, |
| 615 | NULL, v9fs_synth_qtest_write, ctx); |
| 616 | assert(!ret); |
| 617 | |
| 618 | /* File for FLUSH test */ |
| 619 | ret = qemu_v9fs_synth_add_file(NULL, 0, QTEST_V9FS_SYNTH_FLUSH_FILE, |
| 620 | NULL, v9fs_synth_qtest_flush_write, |
| 621 | ctx); |
| 622 | assert(!ret); |
| 623 | |
| 624 | /* Directory for READDIR test */ |
| 625 | { |
| 626 | V9fsSynthNode *dir = NULL; |
| 627 | ret = qemu_v9fs_synth_mkdir( |
| 628 | NULL, 0700, QTEST_V9FS_SYNTH_READDIR_DIR, &dir |
| 629 | ); |
| 630 | assert(!ret); |
| 631 | for (i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) { |
| 632 | char *name = g_strdup_printf( |
| 633 | QTEST_V9FS_SYNTH_READDIR_FILE, i |
| 634 | ); |
| 635 | ret = qemu_v9fs_synth_add_file( |
| 636 | dir, 0, name, NULL, NULL, ctx |
| 637 | ); |
| 638 | assert(!ret); |
| 639 | g_free(name); |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | /* Directory for internal statistic queries */ |
| 644 | { |
| 645 | V9fsSynthNode *stat_dir = NULL; |
| 646 | ret = qemu_v9fs_synth_mkdir(NULL, 0755, "stat", &stat_dir); |
| 647 | assert(!ret); |
| 648 | |
| 649 | /* File for internal xattr count query */ |
| 650 | ret = qemu_v9fs_synth_add_file(stat_dir, 0444, "xattr_count", |
| 651 | v9fs_synth_read_xattr_count, |
| 652 | NULL, ctx); |
| 653 | assert(!ret); |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | return 0; |
| 658 | } |
| 659 | |
| 660 | static int synth_parse_opts(QemuOpts *opts, FsDriverEntry *fse, Error **errp) |
| 661 | { |
| 662 | uint64_t val = qemu_opt_get_number(opts, "max_xattr", |
| 663 | V9FS_MAX_XATTR_DEFAULT); |
| 664 | if (val > UINT32_MAX) { |
| 665 | error_setg(errp, "max_xattr value '%s' too large", |
| 666 | qemu_opt_get(opts, "max_xattr")); |
| 667 | return -1; |
| 668 | } |
| 669 | fse->max_xattr = val; |
| 670 | |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | static bool synth_has_valid_file_handle(int fid_type, V9fsFidOpenState *fs) |
| 675 | { |
| 676 | return false; |
| 677 | } |
| 678 | |
| 679 | FileOperations synth_ops = { |
| 680 | .parse_opts = synth_parse_opts, |
| 681 | .init = synth_init, |
| 682 | .lstat = synth_lstat, |
| 683 | .readlink = synth_readlink, |
| 684 | .close = synth_close, |
| 685 | .closedir = synth_closedir, |
| 686 | .open = synth_open, |
| 687 | .opendir = synth_opendir, |
| 688 | .rewinddir = synth_rewinddir, |
| 689 | .telldir = synth_telldir, |
| 690 | .readdir = synth_readdir, |
| 691 | .seekdir = synth_seekdir, |
| 692 | .preadv = synth_preadv, |
| 693 | .pwritev = synth_pwritev, |
| 694 | .chmod = synth_chmod, |
| 695 | .mknod = synth_mknod, |
| 696 | .mkdir = synth_mkdir, |
| 697 | .fstat = synth_fstat, |
| 698 | .open2 = synth_open2, |
| 699 | .symlink = synth_symlink, |
| 700 | .link = synth_link, |
| 701 | .truncate = synth_truncate, |
| 702 | .rename = synth_rename, |
| 703 | .chown = synth_chown, |
| 704 | .utimensat = synth_utimensat, |
| 705 | .remove = synth_remove, |
| 706 | .fsync = synth_fsync, |
| 707 | .statfs = synth_statfs, |
| 708 | .lgetxattr = synth_lgetxattr, |
| 709 | .llistxattr = synth_llistxattr, |
| 710 | .lsetxattr = synth_lsetxattr, |
| 711 | .lremovexattr = synth_lremovexattr, |
| 712 | .name_to_path = synth_name_to_path, |
| 713 | .renameat = synth_renameat, |
| 714 | .unlinkat = synth_unlinkat, |
| 715 | .has_valid_file_handle = synth_has_valid_file_handle, |
| 716 | .ftruncate = synth_ftruncate, |
| 717 | .futimens = synth_futimens, |
| 718 | }; |