| 1 | /* |
| 2 | * 9p Posix callback |
| 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 | * Not so fast! You might want to read the 9p developer docs first: |
| 15 | * https://wiki.qemu.org/Documentation/9p |
| 16 | */ |
| 17 | |
| 18 | #include "qemu/osdep.h" |
| 19 | #include "9p.h" |
| 20 | #include "9p-local.h" |
| 21 | #include "9p-xattr.h" |
| 22 | #include "9p-util.h" |
| 23 | #include "fsdev/qemu-fsdev.h" /* local_ops */ |
| 24 | #include <arpa/inet.h> |
| 25 | #include <pwd.h> |
| 26 | #include <grp.h> |
| 27 | #include <sys/socket.h> |
| 28 | #include <sys/un.h> |
| 29 | #include "qemu/xattr.h" |
| 30 | #include "qapi/error.h" |
| 31 | #include "qemu/bswap.h" |
| 32 | #include "qemu/cutils.h" |
| 33 | #include "qemu/error-report.h" |
| 34 | #include "qemu/option.h" |
| 35 | #include <libgen.h> |
| 36 | #ifdef CONFIG_LINUX |
| 37 | #include <linux/fs.h> |
| 38 | #ifdef CONFIG_LINUX_MAGIC_H |
| 39 | #include <linux/magic.h> |
| 40 | #endif |
| 41 | #endif |
| 42 | #include <sys/ioctl.h> |
| 43 | |
| 44 | #ifndef XFS_SUPER_MAGIC |
| 45 | #define XFS_SUPER_MAGIC 0x58465342 |
| 46 | #endif |
| 47 | #ifndef EXT2_SUPER_MAGIC |
| 48 | #define EXT2_SUPER_MAGIC 0xEF53 |
| 49 | #endif |
| 50 | #ifndef REISERFS_SUPER_MAGIC |
| 51 | #define REISERFS_SUPER_MAGIC 0x52654973 |
| 52 | #endif |
| 53 | #ifndef BTRFS_SUPER_MAGIC |
| 54 | #define BTRFS_SUPER_MAGIC 0x9123683E |
| 55 | #endif |
| 56 | |
| 57 | typedef struct { |
| 58 | int mountfd; |
| 59 | } LocalData; |
| 60 | |
| 61 | int local_open_nofollow(FsContext *fs_ctx, const char *path, int flags, |
| 62 | mode_t mode) |
| 63 | { |
| 64 | LocalData *data = fs_ctx->private; |
| 65 | int fd = data->mountfd; |
| 66 | |
| 67 | while (*path && fd != -1) { |
| 68 | const char *c; |
| 69 | int next_fd; |
| 70 | char *head; |
| 71 | |
| 72 | /* Only relative paths without consecutive slashes */ |
| 73 | assert(*path != '/'); |
| 74 | |
| 75 | head = g_strdup(path); |
| 76 | c = qemu_strchrnul(path, '/'); |
| 77 | if (*c) { |
| 78 | /* Intermediate path element */ |
| 79 | head[c - path] = 0; |
| 80 | path = c + 1; |
| 81 | next_fd = openat_dir(fd, head); |
| 82 | } else { |
| 83 | /* Rightmost path element */ |
| 84 | next_fd = openat_file(fd, head, flags, mode); |
| 85 | path = c; |
| 86 | } |
| 87 | g_free(head); |
| 88 | if (fd != data->mountfd) { |
| 89 | close_preserve_errno(fd); |
| 90 | } |
| 91 | fd = next_fd; |
| 92 | } |
| 93 | |
| 94 | assert(fd != data->mountfd); |
| 95 | return fd; |
| 96 | } |
| 97 | |
| 98 | int local_opendir_nofollow(FsContext *fs_ctx, const char *path) |
| 99 | { |
| 100 | return local_open_nofollow(fs_ctx, path, O_DIRECTORY | O_RDONLY, 0); |
| 101 | } |
| 102 | |
| 103 | static void renameat_preserve_errno(int odirfd, const char *opath, int ndirfd, |
| 104 | const char *npath) |
| 105 | { |
| 106 | int serrno = errno; |
| 107 | qemu_renameat(odirfd, opath, ndirfd, npath); |
| 108 | errno = serrno; |
| 109 | } |
| 110 | |
| 111 | static void unlinkat_preserve_errno(int dirfd, const char *path, int flags) |
| 112 | { |
| 113 | int serrno = errno; |
| 114 | qemu_unlinkat(dirfd, path, flags); |
| 115 | errno = serrno; |
| 116 | } |
| 117 | |
| 118 | #define VIRTFS_META_DIR ".virtfs_metadata" |
| 119 | #define VIRTFS_META_ROOT_FILE VIRTFS_META_DIR "_root" |
| 120 | |
| 121 | static FILE *local_fopenat(int dirfd, const char *name, const char *mode) |
| 122 | { |
| 123 | int fd, o_mode = 0; |
| 124 | FILE *fp; |
| 125 | int flags; |
| 126 | /* |
| 127 | * only supports two modes |
| 128 | */ |
| 129 | if (mode[0] == 'r') { |
| 130 | flags = O_RDONLY; |
| 131 | } else if (mode[0] == 'w') { |
| 132 | flags = O_WRONLY | O_TRUNC | O_CREAT; |
| 133 | o_mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; |
| 134 | } else { |
| 135 | return NULL; |
| 136 | } |
| 137 | fd = openat_file(dirfd, name, flags, o_mode); |
| 138 | if (fd == -1) { |
| 139 | return NULL; |
| 140 | } |
| 141 | fp = fdopen(fd, mode); |
| 142 | if (!fp) { |
| 143 | close(fd); |
| 144 | } |
| 145 | return fp; |
| 146 | } |
| 147 | |
| 148 | #define ATTR_MAX 100 |
| 149 | static void local_mapped_file_attr(int dirfd, const char *name, |
| 150 | struct stat *stbuf) |
| 151 | { |
| 152 | FILE *fp; |
| 153 | char buf[ATTR_MAX]; |
| 154 | int map_dirfd; |
| 155 | |
| 156 | if (strcmp(name, ".")) { |
| 157 | map_dirfd = openat_dir(dirfd, VIRTFS_META_DIR); |
| 158 | if (map_dirfd == -1) { |
| 159 | return; |
| 160 | } |
| 161 | |
| 162 | fp = local_fopenat(map_dirfd, name, "r"); |
| 163 | close_preserve_errno(map_dirfd); |
| 164 | } else { |
| 165 | fp = local_fopenat(dirfd, VIRTFS_META_ROOT_FILE, "r"); |
| 166 | } |
| 167 | if (!fp) { |
| 168 | return; |
| 169 | } |
| 170 | memset(buf, 0, ATTR_MAX); |
| 171 | while (fgets(buf, ATTR_MAX, fp)) { |
| 172 | if (!strncmp(buf, "virtfs.uid", 10)) { |
| 173 | stbuf->st_uid = atoi(buf + 11); |
| 174 | } else if (!strncmp(buf, "virtfs.gid", 10)) { |
| 175 | stbuf->st_gid = atoi(buf + 11); |
| 176 | } else if (!strncmp(buf, "virtfs.mode", 11)) { |
| 177 | stbuf->st_mode = atoi(buf + 12); |
| 178 | } else if (!strncmp(buf, "virtfs.rdev", 11)) { |
| 179 | stbuf->st_rdev = atoi(buf + 12); |
| 180 | } |
| 181 | memset(buf, 0, ATTR_MAX); |
| 182 | } |
| 183 | fclose(fp); |
| 184 | } |
| 185 | |
| 186 | static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf) |
| 187 | { |
| 188 | int err = -1; |
| 189 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 190 | char *name = g_path_get_basename(fs_path->data); |
| 191 | int dirfd; |
| 192 | |
| 193 | dirfd = local_opendir_nofollow(fs_ctx, dirpath); |
| 194 | if (dirfd == -1) { |
| 195 | goto out; |
| 196 | } |
| 197 | |
| 198 | err = qemu_fstatat(dirfd, name, stbuf, AT_SYMLINK_NOFOLLOW); |
| 199 | if (err) { |
| 200 | goto err_out; |
| 201 | } |
| 202 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 203 | /* Actual credentials are part of extended attrs */ |
| 204 | uid_t tmp_uid; |
| 205 | gid_t tmp_gid; |
| 206 | mode_t tmp_mode; |
| 207 | dev_t tmp_dev; |
| 208 | |
| 209 | if (fgetxattrat_nofollow(dirfd, name, "user.virtfs.uid", &tmp_uid, |
| 210 | sizeof(uid_t)) > 0) { |
| 211 | stbuf->st_uid = le32_to_cpu(tmp_uid); |
| 212 | } |
| 213 | if (fgetxattrat_nofollow(dirfd, name, "user.virtfs.gid", &tmp_gid, |
| 214 | sizeof(gid_t)) > 0) { |
| 215 | stbuf->st_gid = le32_to_cpu(tmp_gid); |
| 216 | } |
| 217 | if (fgetxattrat_nofollow(dirfd, name, "user.virtfs.mode", &tmp_mode, |
| 218 | sizeof(mode_t)) > 0) { |
| 219 | stbuf->st_mode = le32_to_cpu(tmp_mode); |
| 220 | } |
| 221 | if (fgetxattrat_nofollow(dirfd, name, "user.virtfs.rdev", &tmp_dev, |
| 222 | sizeof(dev_t)) > 0) { |
| 223 | stbuf->st_rdev = le64_to_cpu(tmp_dev); |
| 224 | } |
| 225 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 226 | local_mapped_file_attr(dirfd, name, stbuf); |
| 227 | } |
| 228 | |
| 229 | err_out: |
| 230 | close_preserve_errno(dirfd); |
| 231 | out: |
| 232 | g_free(name); |
| 233 | g_free(dirpath); |
| 234 | return err; |
| 235 | } |
| 236 | |
| 237 | static int local_set_mapped_file_attrat(int dirfd, const char *name, |
| 238 | FsCred *credp) |
| 239 | { |
| 240 | FILE *fp; |
| 241 | int ret; |
| 242 | char buf[ATTR_MAX]; |
| 243 | int uid = -1, gid = -1, mode = -1, rdev = -1; |
| 244 | int map_dirfd = -1, map_fd; |
| 245 | bool is_root = !strcmp(name, "."); |
| 246 | |
| 247 | if (is_root) { |
| 248 | fp = local_fopenat(dirfd, VIRTFS_META_ROOT_FILE, "r"); |
| 249 | if (!fp) { |
| 250 | if (errno == ENOENT) { |
| 251 | goto update_map_file; |
| 252 | } else { |
| 253 | return -1; |
| 254 | } |
| 255 | } |
| 256 | } else { |
| 257 | ret = qemu_mkdirat(dirfd, VIRTFS_META_DIR, 0700); |
| 258 | if (ret < 0 && errno != EEXIST) { |
| 259 | return -1; |
| 260 | } |
| 261 | |
| 262 | map_dirfd = openat_dir(dirfd, VIRTFS_META_DIR); |
| 263 | if (map_dirfd == -1) { |
| 264 | return -1; |
| 265 | } |
| 266 | |
| 267 | fp = local_fopenat(map_dirfd, name, "r"); |
| 268 | if (!fp) { |
| 269 | if (errno == ENOENT) { |
| 270 | goto update_map_file; |
| 271 | } else { |
| 272 | close_preserve_errno(map_dirfd); |
| 273 | return -1; |
| 274 | } |
| 275 | } |
| 276 | } |
| 277 | memset(buf, 0, ATTR_MAX); |
| 278 | while (fgets(buf, ATTR_MAX, fp)) { |
| 279 | if (!strncmp(buf, "virtfs.uid", 10)) { |
| 280 | uid = atoi(buf + 11); |
| 281 | } else if (!strncmp(buf, "virtfs.gid", 10)) { |
| 282 | gid = atoi(buf + 11); |
| 283 | } else if (!strncmp(buf, "virtfs.mode", 11)) { |
| 284 | mode = atoi(buf + 12); |
| 285 | } else if (!strncmp(buf, "virtfs.rdev", 11)) { |
| 286 | rdev = atoi(buf + 12); |
| 287 | } |
| 288 | memset(buf, 0, ATTR_MAX); |
| 289 | } |
| 290 | fclose(fp); |
| 291 | |
| 292 | update_map_file: |
| 293 | if (is_root) { |
| 294 | fp = local_fopenat(dirfd, VIRTFS_META_ROOT_FILE, "w"); |
| 295 | } else { |
| 296 | fp = local_fopenat(map_dirfd, name, "w"); |
| 297 | /* We can't go this far with map_dirfd not being a valid file descriptor |
| 298 | * but some versions of gcc aren't smart enough to see it. |
| 299 | */ |
| 300 | if (map_dirfd != -1) { |
| 301 | close_preserve_errno(map_dirfd); |
| 302 | } |
| 303 | } |
| 304 | if (!fp) { |
| 305 | return -1; |
| 306 | } |
| 307 | |
| 308 | map_fd = fileno(fp); |
| 309 | assert(map_fd != -1); |
| 310 | ret = fchmod(map_fd, 0600); |
| 311 | assert(ret == 0); |
| 312 | |
| 313 | if (credp->fc_uid != -1) { |
| 314 | uid = credp->fc_uid; |
| 315 | } |
| 316 | if (credp->fc_gid != -1) { |
| 317 | gid = credp->fc_gid; |
| 318 | } |
| 319 | if (credp->fc_mode != (mode_t)-1) { |
| 320 | mode = credp->fc_mode; |
| 321 | } |
| 322 | if (credp->fc_rdev != -1) { |
| 323 | rdev = credp->fc_rdev; |
| 324 | } |
| 325 | |
| 326 | if (uid != -1) { |
| 327 | fprintf(fp, "virtfs.uid=%d\n", uid); |
| 328 | } |
| 329 | if (gid != -1) { |
| 330 | fprintf(fp, "virtfs.gid=%d\n", gid); |
| 331 | } |
| 332 | if (mode != -1) { |
| 333 | fprintf(fp, "virtfs.mode=%d\n", mode); |
| 334 | } |
| 335 | if (rdev != -1) { |
| 336 | fprintf(fp, "virtfs.rdev=%d\n", rdev); |
| 337 | } |
| 338 | fclose(fp); |
| 339 | |
| 340 | return 0; |
| 341 | } |
| 342 | |
| 343 | static int fchmodat_nofollow(int dirfd, const char *name, mode_t mode) |
| 344 | { |
| 345 | struct stat stbuf; |
| 346 | int fd, ret; |
| 347 | |
| 348 | /* FIXME: this should be handled with fchmodat(AT_SYMLINK_NOFOLLOW). |
| 349 | * Unfortunately, the linux kernel doesn't implement it yet. |
| 350 | */ |
| 351 | |
| 352 | /* First, we clear non-racing symlinks out of the way. */ |
| 353 | if (qemu_fstatat(dirfd, name, &stbuf, AT_SYMLINK_NOFOLLOW)) { |
| 354 | return -1; |
| 355 | } |
| 356 | if (S_ISLNK(stbuf.st_mode)) { |
| 357 | errno = ELOOP; |
| 358 | return -1; |
| 359 | } |
| 360 | |
| 361 | fd = openat_file(dirfd, name, O_RDONLY | O_PATH_9P_UTIL | O_NOFOLLOW, 0); |
| 362 | #if O_PATH_9P_UTIL == 0 |
| 363 | /* Fallback for systems that don't support O_PATH: we depend on the file |
| 364 | * being readable or writable. |
| 365 | */ |
| 366 | if (fd == -1) { |
| 367 | /* In case the file is writable-only and isn't a directory. */ |
| 368 | if (errno == EACCES) { |
| 369 | fd = openat_file(dirfd, name, O_WRONLY, 0); |
| 370 | } |
| 371 | if (fd == -1 && errno == EISDIR) { |
| 372 | errno = EACCES; |
| 373 | } |
| 374 | } |
| 375 | if (fd == -1) { |
| 376 | return -1; |
| 377 | } |
| 378 | ret = fchmod(fd, mode); |
| 379 | #else |
| 380 | /* Access modes are ignored when O_PATH is supported. If name is a symbolic |
| 381 | * link, O_PATH | O_NOFOLLOW causes openat(2) to return a file descriptor |
| 382 | * referring to the symbolic link. |
| 383 | */ |
| 384 | if (fd == -1) { |
| 385 | return -1; |
| 386 | } |
| 387 | |
| 388 | /* Now we handle racing symlinks. */ |
| 389 | ret = fstat(fd, &stbuf); |
| 390 | if (!ret) { |
| 391 | if (S_ISLNK(stbuf.st_mode)) { |
| 392 | errno = ELOOP; |
| 393 | ret = -1; |
| 394 | } else { |
| 395 | char *proc_path = g_strdup_printf("/proc/self/fd/%d", fd); |
| 396 | ret = chmod(proc_path, mode); |
| 397 | g_free(proc_path); |
| 398 | } |
| 399 | } |
| 400 | #endif |
| 401 | close_preserve_errno(fd); |
| 402 | return ret; |
| 403 | } |
| 404 | |
| 405 | static int local_set_xattrat(int dirfd, const char *path, FsCred *credp) |
| 406 | { |
| 407 | int err; |
| 408 | |
| 409 | if (credp->fc_uid != -1) { |
| 410 | uint32_t tmp_uid = cpu_to_le32(credp->fc_uid); |
| 411 | err = fsetxattrat_nofollow(dirfd, path, "user.virtfs.uid", &tmp_uid, |
| 412 | sizeof(uid_t), 0); |
| 413 | if (err) { |
| 414 | return err; |
| 415 | } |
| 416 | } |
| 417 | if (credp->fc_gid != -1) { |
| 418 | uint32_t tmp_gid = cpu_to_le32(credp->fc_gid); |
| 419 | err = fsetxattrat_nofollow(dirfd, path, "user.virtfs.gid", &tmp_gid, |
| 420 | sizeof(gid_t), 0); |
| 421 | if (err) { |
| 422 | return err; |
| 423 | } |
| 424 | } |
| 425 | if (credp->fc_mode != (mode_t)-1) { |
| 426 | uint32_t tmp_mode = cpu_to_le32(credp->fc_mode); |
| 427 | err = fsetxattrat_nofollow(dirfd, path, "user.virtfs.mode", &tmp_mode, |
| 428 | sizeof(mode_t), 0); |
| 429 | if (err) { |
| 430 | return err; |
| 431 | } |
| 432 | } |
| 433 | if (credp->fc_rdev != -1) { |
| 434 | uint64_t tmp_rdev = cpu_to_le64(credp->fc_rdev); |
| 435 | err = fsetxattrat_nofollow(dirfd, path, "user.virtfs.rdev", &tmp_rdev, |
| 436 | sizeof(dev_t), 0); |
| 437 | if (err) { |
| 438 | return err; |
| 439 | } |
| 440 | } |
| 441 | return 0; |
| 442 | } |
| 443 | |
| 444 | static int local_set_cred_passthrough(FsContext *fs_ctx, int dirfd, |
| 445 | const char *name, FsCred *credp) |
| 446 | { |
| 447 | if (fchownat(dirfd, name, credp->fc_uid, credp->fc_gid, |
| 448 | AT_SYMLINK_NOFOLLOW) < 0) { |
| 449 | /* |
| 450 | * If we fail to change ownership and if we are |
| 451 | * using security model none. Ignore the error |
| 452 | */ |
| 453 | if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) { |
| 454 | return -1; |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | return fchmodat_nofollow(dirfd, name, credp->fc_mode & 07777); |
| 459 | } |
| 460 | |
| 461 | static ssize_t local_readlink(FsContext *fs_ctx, V9fsPath *fs_path, |
| 462 | char *buf, size_t bufsz) |
| 463 | { |
| 464 | ssize_t tsize = -1; |
| 465 | |
| 466 | if ((fs_ctx->export_flags & V9FS_SM_MAPPED) || |
| 467 | (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE)) { |
| 468 | int fd; |
| 469 | |
| 470 | fd = local_open_nofollow(fs_ctx, fs_path->data, O_RDONLY, 0); |
| 471 | if (fd == -1) { |
| 472 | if (errno == ELOOP) { |
| 473 | goto native_symlink; |
| 474 | } |
| 475 | return -1; |
| 476 | } |
| 477 | tsize = RETRY_ON_EINTR(read(fd, (void *)buf, bufsz)); |
| 478 | close_preserve_errno(fd); |
| 479 | } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 480 | (fs_ctx->export_flags & V9FS_SM_NONE)) { |
| 481 | native_symlink:; |
| 482 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 483 | char *name = g_path_get_basename(fs_path->data); |
| 484 | int dirfd; |
| 485 | |
| 486 | dirfd = local_opendir_nofollow(fs_ctx, dirpath); |
| 487 | if (dirfd == -1) { |
| 488 | goto out; |
| 489 | } |
| 490 | |
| 491 | tsize = readlinkat(dirfd, name, buf, bufsz); |
| 492 | close_preserve_errno(dirfd); |
| 493 | out: |
| 494 | g_free(name); |
| 495 | g_free(dirpath); |
| 496 | } |
| 497 | return tsize; |
| 498 | } |
| 499 | |
| 500 | static int local_close(FsContext *ctx, V9fsFidOpenState *fs) |
| 501 | { |
| 502 | return close(fs->fd); |
| 503 | } |
| 504 | |
| 505 | static int local_closedir(FsContext *ctx, V9fsFidOpenState *fs) |
| 506 | { |
| 507 | return closedir(fs->dir.stream); |
| 508 | } |
| 509 | |
| 510 | static int local_open(FsContext *ctx, V9fsPath *fs_path, |
| 511 | int flags, V9fsFidOpenState *fs) |
| 512 | { |
| 513 | int fd; |
| 514 | |
| 515 | fd = local_open_nofollow(ctx, fs_path->data, flags, 0); |
| 516 | if (fd == -1) { |
| 517 | return -1; |
| 518 | } |
| 519 | fs->fd = fd; |
| 520 | return fs->fd; |
| 521 | } |
| 522 | |
| 523 | static int local_opendir(FsContext *ctx, |
| 524 | V9fsPath *fs_path, V9fsFidOpenState *fs) |
| 525 | { |
| 526 | int dirfd; |
| 527 | DIR *stream; |
| 528 | |
| 529 | dirfd = local_opendir_nofollow(ctx, fs_path->data); |
| 530 | if (dirfd == -1) { |
| 531 | return -1; |
| 532 | } |
| 533 | |
| 534 | stream = fdopendir(dirfd); |
| 535 | if (!stream) { |
| 536 | close(dirfd); |
| 537 | return -1; |
| 538 | } |
| 539 | fs->dir.stream = stream; |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | static void local_rewinddir(FsContext *ctx, V9fsFidOpenState *fs) |
| 544 | { |
| 545 | rewinddir(fs->dir.stream); |
| 546 | } |
| 547 | |
| 548 | static off_t local_telldir(FsContext *ctx, V9fsFidOpenState *fs) |
| 549 | { |
| 550 | return telldir(fs->dir.stream); |
| 551 | } |
| 552 | |
| 553 | static bool local_is_mapped_file_metadata(FsContext *fs_ctx, const char *name) |
| 554 | { |
| 555 | return |
| 556 | !strcmp(name, VIRTFS_META_DIR) || !strcmp(name, VIRTFS_META_ROOT_FILE); |
| 557 | } |
| 558 | |
| 559 | static struct dirent *local_readdir(FsContext *ctx, V9fsFidOpenState *fs) |
| 560 | { |
| 561 | struct dirent *entry; |
| 562 | |
| 563 | again: |
| 564 | entry = readdir(fs->dir.stream); |
| 565 | if (!entry) { |
| 566 | return NULL; |
| 567 | } |
| 568 | #ifdef CONFIG_DARWIN |
| 569 | int off; |
| 570 | off = telldir(fs->dir.stream); |
| 571 | /* If telldir fails, fail the entire readdir call */ |
| 572 | if (off < 0) { |
| 573 | return NULL; |
| 574 | } |
| 575 | entry->d_seekoff = off; |
| 576 | #endif |
| 577 | |
| 578 | if (ctx->export_flags & V9FS_SM_MAPPED) { |
| 579 | entry->d_type = DT_UNKNOWN; |
| 580 | } else if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 581 | if (local_is_mapped_file_metadata(ctx, entry->d_name)) { |
| 582 | /* skip the meta data */ |
| 583 | goto again; |
| 584 | } |
| 585 | entry->d_type = DT_UNKNOWN; |
| 586 | } |
| 587 | |
| 588 | return entry; |
| 589 | } |
| 590 | |
| 591 | static void local_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off) |
| 592 | { |
| 593 | seekdir(fs->dir.stream, off); |
| 594 | } |
| 595 | |
| 596 | static ssize_t local_preadv(FsContext *ctx, V9fsFidOpenState *fs, |
| 597 | const struct iovec *iov, |
| 598 | int iovcnt, off_t offset) |
| 599 | { |
| 600 | #ifdef CONFIG_PREADV |
| 601 | return preadv(fs->fd, iov, iovcnt, offset); |
| 602 | #else |
| 603 | int err = lseek(fs->fd, offset, SEEK_SET); |
| 604 | if (err == -1) { |
| 605 | return err; |
| 606 | } else { |
| 607 | return readv(fs->fd, iov, iovcnt); |
| 608 | } |
| 609 | #endif |
| 610 | } |
| 611 | |
| 612 | static ssize_t local_pwritev(FsContext *ctx, V9fsFidOpenState *fs, |
| 613 | const struct iovec *iov, |
| 614 | int iovcnt, off_t offset) |
| 615 | { |
| 616 | ssize_t ret; |
| 617 | #ifdef CONFIG_PREADV |
| 618 | ret = pwritev(fs->fd, iov, iovcnt, offset); |
| 619 | #else |
| 620 | int err = lseek(fs->fd, offset, SEEK_SET); |
| 621 | if (err == -1) { |
| 622 | return err; |
| 623 | } else { |
| 624 | ret = writev(fs->fd, iov, iovcnt); |
| 625 | } |
| 626 | #endif |
| 627 | #ifdef CONFIG_SYNC_FILE_RANGE |
| 628 | if (ret > 0 && ctx->export_flags & V9FS_IMMEDIATE_WRITEOUT) { |
| 629 | /* |
| 630 | * Initiate a writeback. This is not a data integrity sync. |
| 631 | * We want to ensure that we don't leave dirty pages in the cache |
| 632 | * after write when writeout=immediate is specified. |
| 633 | */ |
| 634 | sync_file_range(fs->fd, offset, ret, |
| 635 | SYNC_FILE_RANGE_WAIT_BEFORE | SYNC_FILE_RANGE_WRITE); |
| 636 | } |
| 637 | #endif |
| 638 | return ret; |
| 639 | } |
| 640 | |
| 641 | static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
| 642 | { |
| 643 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 644 | char *name = g_path_get_basename(fs_path->data); |
| 645 | int ret = -1; |
| 646 | int dirfd; |
| 647 | |
| 648 | dirfd = local_opendir_nofollow(fs_ctx, dirpath); |
| 649 | if (dirfd == -1) { |
| 650 | goto out; |
| 651 | } |
| 652 | |
| 653 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 654 | ret = local_set_xattrat(dirfd, name, credp); |
| 655 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 656 | ret = local_set_mapped_file_attrat(dirfd, name, credp); |
| 657 | } else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH || |
| 658 | fs_ctx->export_flags & V9FS_SM_NONE) { |
| 659 | ret = fchmodat_nofollow(dirfd, name, credp->fc_mode); |
| 660 | } |
| 661 | close_preserve_errno(dirfd); |
| 662 | |
| 663 | out: |
| 664 | g_free(dirpath); |
| 665 | g_free(name); |
| 666 | return ret; |
| 667 | } |
| 668 | |
| 669 | static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path, |
| 670 | const char *name, FsCred *credp) |
| 671 | { |
| 672 | int err = -1; |
| 673 | int dirfd; |
| 674 | |
| 675 | if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 676 | local_is_mapped_file_metadata(fs_ctx, name)) { |
| 677 | errno = EINVAL; |
| 678 | return -1; |
| 679 | } |
| 680 | |
| 681 | dirfd = local_opendir_nofollow(fs_ctx, dir_path->data); |
| 682 | if (dirfd == -1) { |
| 683 | return -1; |
| 684 | } |
| 685 | |
| 686 | if (fs_ctx->export_flags & V9FS_SM_MAPPED || |
| 687 | fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 688 | err = qemu_mknodat(dirfd, name, fs_ctx->fmode | S_IFREG, 0); |
| 689 | if (err == -1) { |
| 690 | goto out; |
| 691 | } |
| 692 | |
| 693 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 694 | err = local_set_xattrat(dirfd, name, credp); |
| 695 | } else { |
| 696 | err = local_set_mapped_file_attrat(dirfd, name, credp); |
| 697 | } |
| 698 | if (err == -1) { |
| 699 | goto err_end; |
| 700 | } |
| 701 | } else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH || |
| 702 | fs_ctx->export_flags & V9FS_SM_NONE) { |
| 703 | err = qemu_mknodat(dirfd, name, credp->fc_mode, credp->fc_rdev); |
| 704 | if (err == -1) { |
| 705 | goto out; |
| 706 | } |
| 707 | err = local_set_cred_passthrough(fs_ctx, dirfd, name, credp); |
| 708 | if (err == -1) { |
| 709 | goto err_end; |
| 710 | } |
| 711 | } |
| 712 | goto out; |
| 713 | |
| 714 | err_end: |
| 715 | unlinkat_preserve_errno(dirfd, name, 0); |
| 716 | out: |
| 717 | close_preserve_errno(dirfd); |
| 718 | return err; |
| 719 | } |
| 720 | |
| 721 | static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path, |
| 722 | const char *name, FsCred *credp) |
| 723 | { |
| 724 | int err = -1; |
| 725 | int dirfd; |
| 726 | |
| 727 | if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 728 | local_is_mapped_file_metadata(fs_ctx, name)) { |
| 729 | errno = EINVAL; |
| 730 | return -1; |
| 731 | } |
| 732 | |
| 733 | dirfd = local_opendir_nofollow(fs_ctx, dir_path->data); |
| 734 | if (dirfd == -1) { |
| 735 | return -1; |
| 736 | } |
| 737 | |
| 738 | if (fs_ctx->export_flags & V9FS_SM_MAPPED || |
| 739 | fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 740 | err = qemu_mkdirat(dirfd, name, fs_ctx->dmode); |
| 741 | if (err == -1) { |
| 742 | goto out; |
| 743 | } |
| 744 | credp->fc_mode = credp->fc_mode | S_IFDIR; |
| 745 | |
| 746 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 747 | err = local_set_xattrat(dirfd, name, credp); |
| 748 | } else { |
| 749 | err = local_set_mapped_file_attrat(dirfd, name, credp); |
| 750 | } |
| 751 | if (err == -1) { |
| 752 | goto err_end; |
| 753 | } |
| 754 | } else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH || |
| 755 | fs_ctx->export_flags & V9FS_SM_NONE) { |
| 756 | err = qemu_mkdirat(dirfd, name, credp->fc_mode); |
| 757 | if (err == -1) { |
| 758 | goto out; |
| 759 | } |
| 760 | err = local_set_cred_passthrough(fs_ctx, dirfd, name, credp); |
| 761 | if (err == -1) { |
| 762 | goto err_end; |
| 763 | } |
| 764 | } |
| 765 | goto out; |
| 766 | |
| 767 | err_end: |
| 768 | unlinkat_preserve_errno(dirfd, name, AT_REMOVEDIR); |
| 769 | out: |
| 770 | close_preserve_errno(dirfd); |
| 771 | return err; |
| 772 | } |
| 773 | |
| 774 | static int local_fid_fd(int fid_type, V9fsFidOpenState *fs) |
| 775 | { |
| 776 | if (fid_type == P9_FID_DIR) { |
| 777 | return dirfd(fs->dir.stream); |
| 778 | } else if (fid_type == P9_FID_FILE) { |
| 779 | return fs->fd; |
| 780 | } else { |
| 781 | errno = EBADF; |
| 782 | return -1; |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | static int local_fstat(FsContext *fs_ctx, int fid_type, |
| 787 | V9fsFidOpenState *fs, struct stat *stbuf) |
| 788 | { |
| 789 | int err, fd = local_fid_fd(fid_type, fs); |
| 790 | |
| 791 | err = fstat(fd, stbuf); |
| 792 | if (err) { |
| 793 | return err; |
| 794 | } |
| 795 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 796 | /* Actual credentials are part of extended attrs */ |
| 797 | uid_t tmp_uid; |
| 798 | gid_t tmp_gid; |
| 799 | mode_t tmp_mode; |
| 800 | dev_t tmp_dev; |
| 801 | |
| 802 | if (qemu_fgetxattr(fd, "user.virtfs.uid", |
| 803 | &tmp_uid, sizeof(uid_t)) > 0) { |
| 804 | stbuf->st_uid = le32_to_cpu(tmp_uid); |
| 805 | } |
| 806 | if (qemu_fgetxattr(fd, "user.virtfs.gid", |
| 807 | &tmp_gid, sizeof(gid_t)) > 0) { |
| 808 | stbuf->st_gid = le32_to_cpu(tmp_gid); |
| 809 | } |
| 810 | if (qemu_fgetxattr(fd, "user.virtfs.mode", |
| 811 | &tmp_mode, sizeof(mode_t)) > 0) { |
| 812 | stbuf->st_mode = le32_to_cpu(tmp_mode); |
| 813 | } |
| 814 | if (qemu_fgetxattr(fd, "user.virtfs.rdev", |
| 815 | &tmp_dev, sizeof(dev_t)) > 0) { |
| 816 | stbuf->st_rdev = le64_to_cpu(tmp_dev); |
| 817 | } |
| 818 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 819 | errno = EOPNOTSUPP; |
| 820 | return -1; |
| 821 | } |
| 822 | return err; |
| 823 | } |
| 824 | |
| 825 | static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name, |
| 826 | int flags, FsCred *credp, V9fsFidOpenState *fs) |
| 827 | { |
| 828 | int fd = -1; |
| 829 | int err = -1; |
| 830 | int dirfd; |
| 831 | |
| 832 | if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 833 | local_is_mapped_file_metadata(fs_ctx, name)) { |
| 834 | errno = EINVAL; |
| 835 | return -1; |
| 836 | } |
| 837 | |
| 838 | /* |
| 839 | * Mark all the open to not follow symlinks |
| 840 | */ |
| 841 | flags |= O_NOFOLLOW; |
| 842 | |
| 843 | dirfd = local_opendir_nofollow(fs_ctx, dir_path->data); |
| 844 | if (dirfd == -1) { |
| 845 | return -1; |
| 846 | } |
| 847 | |
| 848 | /* Determine the security model */ |
| 849 | if (fs_ctx->export_flags & V9FS_SM_MAPPED || |
| 850 | fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 851 | fd = openat_file(dirfd, name, flags, fs_ctx->fmode); |
| 852 | if (fd == -1) { |
| 853 | goto out; |
| 854 | } |
| 855 | credp->fc_mode = credp->fc_mode | S_IFREG; |
| 856 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 857 | /* Set client credentials in xattr */ |
| 858 | err = local_set_xattrat(dirfd, name, credp); |
| 859 | } else { |
| 860 | err = local_set_mapped_file_attrat(dirfd, name, credp); |
| 861 | } |
| 862 | if (err == -1) { |
| 863 | goto err_end; |
| 864 | } |
| 865 | } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 866 | (fs_ctx->export_flags & V9FS_SM_NONE)) { |
| 867 | fd = openat_file(dirfd, name, flags, credp->fc_mode); |
| 868 | if (fd == -1) { |
| 869 | goto out; |
| 870 | } |
| 871 | err = local_set_cred_passthrough(fs_ctx, dirfd, name, credp); |
| 872 | if (err == -1) { |
| 873 | goto err_end; |
| 874 | } |
| 875 | } |
| 876 | err = fd; |
| 877 | fs->fd = fd; |
| 878 | goto out; |
| 879 | |
| 880 | err_end: |
| 881 | unlinkat_preserve_errno(dirfd, name, |
| 882 | flags & O_DIRECTORY ? AT_REMOVEDIR : 0); |
| 883 | close_preserve_errno(fd); |
| 884 | out: |
| 885 | close_preserve_errno(dirfd); |
| 886 | return err; |
| 887 | } |
| 888 | |
| 889 | |
| 890 | static int local_symlink(FsContext *fs_ctx, const char *oldpath, |
| 891 | V9fsPath *dir_path, const char *name, FsCred *credp) |
| 892 | { |
| 893 | int err = -1; |
| 894 | int dirfd; |
| 895 | |
| 896 | if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 897 | local_is_mapped_file_metadata(fs_ctx, name)) { |
| 898 | errno = EINVAL; |
| 899 | return -1; |
| 900 | } |
| 901 | |
| 902 | dirfd = local_opendir_nofollow(fs_ctx, dir_path->data); |
| 903 | if (dirfd == -1) { |
| 904 | return -1; |
| 905 | } |
| 906 | |
| 907 | /* Determine the security model */ |
| 908 | if (fs_ctx->export_flags & V9FS_SM_MAPPED || |
| 909 | fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 910 | int fd; |
| 911 | ssize_t oldpath_size, write_size; |
| 912 | |
| 913 | fd = openat_file(dirfd, name, O_CREAT | O_EXCL | O_RDWR, |
| 914 | fs_ctx->fmode); |
| 915 | if (fd == -1) { |
| 916 | goto out; |
| 917 | } |
| 918 | /* Write the oldpath (target) to the file. */ |
| 919 | oldpath_size = strlen(oldpath); |
| 920 | write_size = RETRY_ON_EINTR(write(fd, (void *)oldpath, oldpath_size)); |
| 921 | close_preserve_errno(fd); |
| 922 | |
| 923 | if (write_size != oldpath_size) { |
| 924 | goto err_end; |
| 925 | } |
| 926 | /* Set client credentials in symlink's xattr */ |
| 927 | credp->fc_mode = credp->fc_mode | S_IFLNK; |
| 928 | |
| 929 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 930 | err = local_set_xattrat(dirfd, name, credp); |
| 931 | } else { |
| 932 | err = local_set_mapped_file_attrat(dirfd, name, credp); |
| 933 | } |
| 934 | if (err == -1) { |
| 935 | goto err_end; |
| 936 | } |
| 937 | } else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH || |
| 938 | fs_ctx->export_flags & V9FS_SM_NONE) { |
| 939 | err = symlinkat(oldpath, dirfd, name); |
| 940 | if (err) { |
| 941 | goto out; |
| 942 | } |
| 943 | err = fchownat(dirfd, name, credp->fc_uid, credp->fc_gid, |
| 944 | AT_SYMLINK_NOFOLLOW); |
| 945 | if (err == -1) { |
| 946 | /* |
| 947 | * If we fail to change ownership and if we are |
| 948 | * using security model none. Ignore the error |
| 949 | */ |
| 950 | if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) { |
| 951 | goto err_end; |
| 952 | } else { |
| 953 | err = 0; |
| 954 | } |
| 955 | } |
| 956 | } |
| 957 | goto out; |
| 958 | |
| 959 | err_end: |
| 960 | unlinkat_preserve_errno(dirfd, name, 0); |
| 961 | out: |
| 962 | close_preserve_errno(dirfd); |
| 963 | return err; |
| 964 | } |
| 965 | |
| 966 | static int local_link(FsContext *ctx, V9fsPath *oldpath, |
| 967 | V9fsPath *dirpath, const char *name) |
| 968 | { |
| 969 | char *odirpath = g_path_get_dirname(oldpath->data); |
| 970 | char *oname = g_path_get_basename(oldpath->data); |
| 971 | int ret = -1; |
| 972 | int odirfd, ndirfd; |
| 973 | |
| 974 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 975 | local_is_mapped_file_metadata(ctx, name)) { |
| 976 | errno = EINVAL; |
| 977 | goto out; |
| 978 | } |
| 979 | |
| 980 | odirfd = local_opendir_nofollow(ctx, odirpath); |
| 981 | if (odirfd == -1) { |
| 982 | goto out; |
| 983 | } |
| 984 | |
| 985 | ndirfd = local_opendir_nofollow(ctx, dirpath->data); |
| 986 | if (ndirfd == -1) { |
| 987 | close_preserve_errno(odirfd); |
| 988 | goto out; |
| 989 | } |
| 990 | |
| 991 | ret = linkat(odirfd, oname, ndirfd, name, 0); |
| 992 | if (ret < 0) { |
| 993 | goto out_close; |
| 994 | } |
| 995 | |
| 996 | /* now link the virtfs_metadata files */ |
| 997 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 998 | int omap_dirfd, nmap_dirfd; |
| 999 | |
| 1000 | ret = qemu_mkdirat(ndirfd, VIRTFS_META_DIR, 0700); |
| 1001 | if (ret < 0 && errno != EEXIST) { |
| 1002 | goto err_undo_link; |
| 1003 | } |
| 1004 | |
| 1005 | omap_dirfd = openat_dir(odirfd, VIRTFS_META_DIR); |
| 1006 | if (omap_dirfd == -1) { |
| 1007 | goto err; |
| 1008 | } |
| 1009 | |
| 1010 | nmap_dirfd = openat_dir(ndirfd, VIRTFS_META_DIR); |
| 1011 | if (nmap_dirfd == -1) { |
| 1012 | close_preserve_errno(omap_dirfd); |
| 1013 | goto err; |
| 1014 | } |
| 1015 | |
| 1016 | ret = linkat(omap_dirfd, oname, nmap_dirfd, name, 0); |
| 1017 | close_preserve_errno(nmap_dirfd); |
| 1018 | close_preserve_errno(omap_dirfd); |
| 1019 | if (ret < 0 && errno != ENOENT) { |
| 1020 | goto err_undo_link; |
| 1021 | } |
| 1022 | |
| 1023 | ret = 0; |
| 1024 | } |
| 1025 | goto out_close; |
| 1026 | |
| 1027 | err: |
| 1028 | ret = -1; |
| 1029 | err_undo_link: |
| 1030 | unlinkat_preserve_errno(ndirfd, name, 0); |
| 1031 | out_close: |
| 1032 | close_preserve_errno(ndirfd); |
| 1033 | close_preserve_errno(odirfd); |
| 1034 | out: |
| 1035 | g_free(oname); |
| 1036 | g_free(odirpath); |
| 1037 | return ret; |
| 1038 | } |
| 1039 | |
| 1040 | static int local_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size) |
| 1041 | { |
| 1042 | int fd, ret; |
| 1043 | |
| 1044 | fd = local_open_nofollow(ctx, fs_path->data, O_WRONLY, 0); |
| 1045 | if (fd == -1) { |
| 1046 | return -1; |
| 1047 | } |
| 1048 | ret = ftruncate(fd, size); |
| 1049 | close_preserve_errno(fd); |
| 1050 | return ret; |
| 1051 | } |
| 1052 | |
| 1053 | static int local_ftruncate(FsContext *ctx, int fid_type, V9fsFidOpenState *fs, |
| 1054 | off_t size) |
| 1055 | { |
| 1056 | int fd = local_fid_fd(fid_type, fs); |
| 1057 | |
| 1058 | return ftruncate(fd, size); |
| 1059 | } |
| 1060 | |
| 1061 | static int local_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
| 1062 | { |
| 1063 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 1064 | char *name = g_path_get_basename(fs_path->data); |
| 1065 | int ret = -1; |
| 1066 | int dirfd; |
| 1067 | |
| 1068 | dirfd = local_opendir_nofollow(fs_ctx, dirpath); |
| 1069 | if (dirfd == -1) { |
| 1070 | goto out; |
| 1071 | } |
| 1072 | |
| 1073 | if ((credp->fc_uid == -1 && credp->fc_gid == -1) || |
| 1074 | (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 1075 | (fs_ctx->export_flags & V9FS_SM_NONE)) { |
| 1076 | ret = fchownat(dirfd, name, credp->fc_uid, credp->fc_gid, |
| 1077 | AT_SYMLINK_NOFOLLOW); |
| 1078 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 1079 | ret = local_set_xattrat(dirfd, name, credp); |
| 1080 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 1081 | ret = local_set_mapped_file_attrat(dirfd, name, credp); |
| 1082 | } |
| 1083 | |
| 1084 | close_preserve_errno(dirfd); |
| 1085 | out: |
| 1086 | g_free(name); |
| 1087 | g_free(dirpath); |
| 1088 | return ret; |
| 1089 | } |
| 1090 | |
| 1091 | static int local_utimensat(FsContext *s, V9fsPath *fs_path, |
| 1092 | const struct timespec *buf) |
| 1093 | { |
| 1094 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 1095 | char *name = g_path_get_basename(fs_path->data); |
| 1096 | int dirfd, ret = -1; |
| 1097 | |
| 1098 | dirfd = local_opendir_nofollow(s, dirpath); |
| 1099 | if (dirfd == -1) { |
| 1100 | goto out; |
| 1101 | } |
| 1102 | |
| 1103 | ret = qemu_utimensat(dirfd, name, buf, AT_SYMLINK_NOFOLLOW); |
| 1104 | close_preserve_errno(dirfd); |
| 1105 | out: |
| 1106 | g_free(dirpath); |
| 1107 | g_free(name); |
| 1108 | return ret; |
| 1109 | } |
| 1110 | |
| 1111 | static int local_futimens(FsContext *s, int fid_type, V9fsFidOpenState *fs, |
| 1112 | const struct timespec *times) |
| 1113 | { |
| 1114 | int fd = local_fid_fd(fid_type, fs); |
| 1115 | |
| 1116 | return qemu_futimens(fd, times); |
| 1117 | } |
| 1118 | |
| 1119 | static int local_unlinkat_common(FsContext *ctx, int dirfd, const char *name, |
| 1120 | int flags) |
| 1121 | { |
| 1122 | int ret; |
| 1123 | |
| 1124 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 1125 | int map_dirfd; |
| 1126 | |
| 1127 | /* We need to remove the metadata as well: |
| 1128 | * - the metadata directory if we're removing a directory |
| 1129 | * - the metadata file in the parent's metadata directory |
| 1130 | * |
| 1131 | * If any of these are missing (ie, ENOENT) then we're probably |
| 1132 | * trying to remove something that wasn't created in mapped-file |
| 1133 | * mode. We just ignore the error. |
| 1134 | */ |
| 1135 | if (flags == AT_REMOVEDIR) { |
| 1136 | int fd; |
| 1137 | |
| 1138 | fd = openat_dir(dirfd, name); |
| 1139 | if (fd == -1) { |
| 1140 | return -1; |
| 1141 | } |
| 1142 | ret = qemu_unlinkat(fd, VIRTFS_META_DIR, AT_REMOVEDIR); |
| 1143 | close_preserve_errno(fd); |
| 1144 | if (ret < 0 && errno != ENOENT) { |
| 1145 | return -1; |
| 1146 | } |
| 1147 | } |
| 1148 | map_dirfd = openat_dir(dirfd, VIRTFS_META_DIR); |
| 1149 | if (map_dirfd != -1) { |
| 1150 | ret = qemu_unlinkat(map_dirfd, name, 0); |
| 1151 | close_preserve_errno(map_dirfd); |
| 1152 | if (ret < 0 && errno != ENOENT) { |
| 1153 | return -1; |
| 1154 | } |
| 1155 | } else if (errno != ENOENT) { |
| 1156 | return -1; |
| 1157 | } |
| 1158 | } |
| 1159 | |
| 1160 | return qemu_unlinkat(dirfd, name, flags); |
| 1161 | } |
| 1162 | |
| 1163 | static int local_remove(FsContext *ctx, const char *path) |
| 1164 | { |
| 1165 | struct stat stbuf; |
| 1166 | char *dirpath = g_path_get_dirname(path); |
| 1167 | char *name = g_path_get_basename(path); |
| 1168 | int flags = 0; |
| 1169 | int dirfd; |
| 1170 | int err = -1; |
| 1171 | |
| 1172 | dirfd = local_opendir_nofollow(ctx, dirpath); |
| 1173 | if (dirfd == -1) { |
| 1174 | goto out; |
| 1175 | } |
| 1176 | |
| 1177 | if (qemu_fstatat(dirfd, name, &stbuf, AT_SYMLINK_NOFOLLOW) < 0) { |
| 1178 | goto err_out; |
| 1179 | } |
| 1180 | |
| 1181 | if (S_ISDIR(stbuf.st_mode)) { |
| 1182 | flags |= AT_REMOVEDIR; |
| 1183 | } |
| 1184 | |
| 1185 | err = local_unlinkat_common(ctx, dirfd, name, flags); |
| 1186 | err_out: |
| 1187 | close_preserve_errno(dirfd); |
| 1188 | out: |
| 1189 | g_free(name); |
| 1190 | g_free(dirpath); |
| 1191 | return err; |
| 1192 | } |
| 1193 | |
| 1194 | static int local_fsync(FsContext *ctx, int fid_type, |
| 1195 | V9fsFidOpenState *fs, int datasync) |
| 1196 | { |
| 1197 | int fd = local_fid_fd(fid_type, fs); |
| 1198 | |
| 1199 | if (datasync) { |
| 1200 | return qemu_fdatasync(fd); |
| 1201 | } else { |
| 1202 | return fsync(fd); |
| 1203 | } |
| 1204 | } |
| 1205 | |
| 1206 | static int local_statfs(FsContext *s, V9fsPath *fs_path, struct statfs *stbuf) |
| 1207 | { |
| 1208 | int fd, ret; |
| 1209 | |
| 1210 | fd = local_open_nofollow(s, fs_path->data, O_RDONLY, 0); |
| 1211 | if (fd == -1) { |
| 1212 | return -1; |
| 1213 | } |
| 1214 | ret = fstatfs(fd, stbuf); |
| 1215 | close_preserve_errno(fd); |
| 1216 | return ret; |
| 1217 | } |
| 1218 | |
| 1219 | static ssize_t local_lgetxattr(FsContext *ctx, V9fsPath *fs_path, |
| 1220 | const char *name, void *value, size_t size) |
| 1221 | { |
| 1222 | char *path = fs_path->data; |
| 1223 | |
| 1224 | return v9fs_get_xattr(ctx, path, name, value, size); |
| 1225 | } |
| 1226 | |
| 1227 | static ssize_t local_llistxattr(FsContext *ctx, V9fsPath *fs_path, |
| 1228 | void *value, size_t size) |
| 1229 | { |
| 1230 | char *path = fs_path->data; |
| 1231 | |
| 1232 | return v9fs_list_xattr(ctx, path, value, size); |
| 1233 | } |
| 1234 | |
| 1235 | static int local_lsetxattr(FsContext *ctx, V9fsPath *fs_path, const char *name, |
| 1236 | void *value, size_t size, int flags) |
| 1237 | { |
| 1238 | char *path = fs_path->data; |
| 1239 | |
| 1240 | return v9fs_set_xattr(ctx, path, name, value, size, flags); |
| 1241 | } |
| 1242 | |
| 1243 | static int local_lremovexattr(FsContext *ctx, V9fsPath *fs_path, |
| 1244 | const char *name) |
| 1245 | { |
| 1246 | char *path = fs_path->data; |
| 1247 | |
| 1248 | return v9fs_remove_xattr(ctx, path, name); |
| 1249 | } |
| 1250 | |
| 1251 | static int local_name_to_path(FsContext *ctx, V9fsPath *dir_path, |
| 1252 | const char *name, V9fsPath *target) |
| 1253 | { |
| 1254 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 1255 | local_is_mapped_file_metadata(ctx, name)) { |
| 1256 | errno = EINVAL; |
| 1257 | return -1; |
| 1258 | } |
| 1259 | |
| 1260 | if (dir_path) { |
| 1261 | if (!strcmp(name, ".")) { |
| 1262 | /* "." relative to "foo/bar" is "foo/bar" */ |
| 1263 | v9fs_path_copy(target, dir_path); |
| 1264 | } else if (!strcmp(name, "..")) { |
| 1265 | if (!strcmp(dir_path->data, ".")) { |
| 1266 | /* ".." relative to the root is "." */ |
| 1267 | if (v9fs_path_sprintf(target, ".") < 0) { |
| 1268 | return -1; |
| 1269 | } |
| 1270 | } else { |
| 1271 | g_autofree char *tmp = g_path_get_dirname(dir_path->data); |
| 1272 | /* Symbolic links are resolved by the client. We can assume |
| 1273 | * that ".." relative to "foo/bar" is equivalent to "foo" |
| 1274 | */ |
| 1275 | if (v9fs_path_sprintf(target, "%s", tmp) < 0) { |
| 1276 | return -1; |
| 1277 | } |
| 1278 | } |
| 1279 | } else { |
| 1280 | assert(!strchr(name, '/')); |
| 1281 | if (v9fs_path_sprintf(target, "%s/%s", dir_path->data, name) < 0) { |
| 1282 | return -1; |
| 1283 | } |
| 1284 | } |
| 1285 | } else if (!strcmp(name, "/") || !strcmp(name, ".") || |
| 1286 | !strcmp(name, "..")) { |
| 1287 | /* This is the root fid */ |
| 1288 | if (v9fs_path_sprintf(target, ".") < 0) { |
| 1289 | return -1; |
| 1290 | } |
| 1291 | } else { |
| 1292 | assert(!strchr(name, '/')); |
| 1293 | if (v9fs_path_sprintf(target, "./%s", name) < 0) { |
| 1294 | return -1; |
| 1295 | } |
| 1296 | } |
| 1297 | return 0; |
| 1298 | } |
| 1299 | |
| 1300 | static int local_renameat(FsContext *ctx, V9fsPath *olddir, |
| 1301 | const char *old_name, V9fsPath *newdir, |
| 1302 | const char *new_name) |
| 1303 | { |
| 1304 | int ret; |
| 1305 | int odirfd, ndirfd; |
| 1306 | |
| 1307 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 1308 | (local_is_mapped_file_metadata(ctx, old_name) || |
| 1309 | local_is_mapped_file_metadata(ctx, new_name))) { |
| 1310 | errno = EINVAL; |
| 1311 | return -1; |
| 1312 | } |
| 1313 | |
| 1314 | odirfd = local_opendir_nofollow(ctx, olddir->data); |
| 1315 | if (odirfd == -1) { |
| 1316 | return -1; |
| 1317 | } |
| 1318 | |
| 1319 | ndirfd = local_opendir_nofollow(ctx, newdir->data); |
| 1320 | if (ndirfd == -1) { |
| 1321 | close_preserve_errno(odirfd); |
| 1322 | return -1; |
| 1323 | } |
| 1324 | |
| 1325 | ret = qemu_renameat(odirfd, old_name, ndirfd, new_name); |
| 1326 | if (ret < 0) { |
| 1327 | goto out; |
| 1328 | } |
| 1329 | |
| 1330 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 1331 | int omap_dirfd, nmap_dirfd; |
| 1332 | |
| 1333 | ret = qemu_mkdirat(ndirfd, VIRTFS_META_DIR, 0700); |
| 1334 | if (ret < 0 && errno != EEXIST) { |
| 1335 | goto err_undo_rename; |
| 1336 | } |
| 1337 | |
| 1338 | omap_dirfd = openat_dir(odirfd, VIRTFS_META_DIR); |
| 1339 | if (omap_dirfd == -1) { |
| 1340 | goto err; |
| 1341 | } |
| 1342 | |
| 1343 | nmap_dirfd = openat_dir(ndirfd, VIRTFS_META_DIR); |
| 1344 | if (nmap_dirfd == -1) { |
| 1345 | close_preserve_errno(omap_dirfd); |
| 1346 | goto err; |
| 1347 | } |
| 1348 | |
| 1349 | /* rename the .virtfs_metadata files */ |
| 1350 | ret = qemu_renameat(omap_dirfd, old_name, nmap_dirfd, new_name); |
| 1351 | close_preserve_errno(nmap_dirfd); |
| 1352 | close_preserve_errno(omap_dirfd); |
| 1353 | if (ret < 0 && errno != ENOENT) { |
| 1354 | goto err_undo_rename; |
| 1355 | } |
| 1356 | |
| 1357 | ret = 0; |
| 1358 | } |
| 1359 | goto out; |
| 1360 | |
| 1361 | err: |
| 1362 | ret = -1; |
| 1363 | err_undo_rename: |
| 1364 | renameat_preserve_errno(ndirfd, new_name, odirfd, old_name); |
| 1365 | out: |
| 1366 | close_preserve_errno(ndirfd); |
| 1367 | close_preserve_errno(odirfd); |
| 1368 | return ret; |
| 1369 | } |
| 1370 | |
| 1371 | static void v9fs_path_init_dirname(V9fsPath *path, const char *str) |
| 1372 | { |
| 1373 | path->data = g_path_get_dirname(str); |
| 1374 | path->size = strlen(path->data) + 1; |
| 1375 | } |
| 1376 | |
| 1377 | static int local_rename(FsContext *ctx, const char *oldpath, |
| 1378 | const char *newpath) |
| 1379 | { |
| 1380 | int err; |
| 1381 | char *oname = g_path_get_basename(oldpath); |
| 1382 | char *nname = g_path_get_basename(newpath); |
| 1383 | V9fsPath olddir, newdir; |
| 1384 | |
| 1385 | v9fs_path_init_dirname(&olddir, oldpath); |
| 1386 | v9fs_path_init_dirname(&newdir, newpath); |
| 1387 | |
| 1388 | err = local_renameat(ctx, &olddir, oname, &newdir, nname); |
| 1389 | |
| 1390 | v9fs_path_free(&newdir); |
| 1391 | v9fs_path_free(&olddir); |
| 1392 | g_free(nname); |
| 1393 | g_free(oname); |
| 1394 | |
| 1395 | return err; |
| 1396 | } |
| 1397 | |
| 1398 | static int local_unlinkat(FsContext *ctx, V9fsPath *dir, |
| 1399 | const char *name, int flags) |
| 1400 | { |
| 1401 | int ret; |
| 1402 | int dirfd; |
| 1403 | |
| 1404 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 1405 | local_is_mapped_file_metadata(ctx, name)) { |
| 1406 | errno = EINVAL; |
| 1407 | return -1; |
| 1408 | } |
| 1409 | |
| 1410 | dirfd = local_opendir_nofollow(ctx, dir->data); |
| 1411 | if (dirfd == -1) { |
| 1412 | return -1; |
| 1413 | } |
| 1414 | |
| 1415 | ret = local_unlinkat_common(ctx, dirfd, name, flags); |
| 1416 | close_preserve_errno(dirfd); |
| 1417 | return ret; |
| 1418 | } |
| 1419 | |
| 1420 | #ifdef FS_IOC_GETVERSION |
| 1421 | static int local_ioc_getversion(FsContext *ctx, V9fsPath *path, |
| 1422 | mode_t st_mode, uint64_t *st_gen) |
| 1423 | { |
| 1424 | int err; |
| 1425 | V9fsFidOpenState fid_open; |
| 1426 | |
| 1427 | /* |
| 1428 | * Do not try to open special files like device nodes, fifos etc |
| 1429 | * We can get fd for regular files and directories only |
| 1430 | */ |
| 1431 | if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) { |
| 1432 | errno = ENOTTY; |
| 1433 | return -1; |
| 1434 | } |
| 1435 | err = local_open(ctx, path, O_RDONLY, &fid_open); |
| 1436 | if (err < 0) { |
| 1437 | return err; |
| 1438 | } |
| 1439 | err = ioctl(fid_open.fd, FS_IOC_GETVERSION, st_gen); |
| 1440 | local_close(ctx, &fid_open); |
| 1441 | return err; |
| 1442 | } |
| 1443 | #endif |
| 1444 | |
| 1445 | static int local_ioc_getversion_init(FsContext *ctx, LocalData *data, Error **errp) |
| 1446 | { |
| 1447 | #ifdef FS_IOC_GETVERSION |
| 1448 | struct statfs stbuf; |
| 1449 | |
| 1450 | /* |
| 1451 | * use ioc_getversion only if the ioctl is defined |
| 1452 | */ |
| 1453 | if (fstatfs(data->mountfd, &stbuf) < 0) { |
| 1454 | error_setg_errno(errp, errno, |
| 1455 | "failed to stat file system at '%s'", ctx->fs_root); |
| 1456 | return -1; |
| 1457 | } |
| 1458 | switch (stbuf.f_type) { |
| 1459 | case EXT2_SUPER_MAGIC: |
| 1460 | case BTRFS_SUPER_MAGIC: |
| 1461 | case REISERFS_SUPER_MAGIC: |
| 1462 | case XFS_SUPER_MAGIC: |
| 1463 | ctx->exops.get_st_gen = local_ioc_getversion; |
| 1464 | break; |
| 1465 | } |
| 1466 | #endif |
| 1467 | return 0; |
| 1468 | } |
| 1469 | |
| 1470 | static int local_init(FsContext *ctx, Error **errp) |
| 1471 | { |
| 1472 | LocalData *data = g_malloc(sizeof(*data)); |
| 1473 | |
| 1474 | data->mountfd = open(ctx->fs_root, O_DIRECTORY | O_RDONLY); |
| 1475 | if (data->mountfd == -1) { |
| 1476 | error_setg_file_open(errp, errno, ctx->fs_root); |
| 1477 | goto err; |
| 1478 | } |
| 1479 | |
| 1480 | if (local_ioc_getversion_init(ctx, data, errp) < 0) { |
| 1481 | close(data->mountfd); |
| 1482 | goto err; |
| 1483 | } |
| 1484 | |
| 1485 | if (ctx->export_flags & V9FS_SM_PASSTHROUGH) { |
| 1486 | ctx->xops = passthrough_xattr_ops; |
| 1487 | } else if (ctx->export_flags & V9FS_SM_MAPPED) { |
| 1488 | ctx->xops = mapped_xattr_ops; |
| 1489 | } else if (ctx->export_flags & V9FS_SM_NONE) { |
| 1490 | ctx->xops = none_xattr_ops; |
| 1491 | } else if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 1492 | /* |
| 1493 | * xattr operation for mapped-file and passthrough |
| 1494 | * remain same. |
| 1495 | */ |
| 1496 | ctx->xops = passthrough_xattr_ops; |
| 1497 | } |
| 1498 | ctx->export_flags |= V9FS_PATHNAME_FSCONTEXT; |
| 1499 | |
| 1500 | ctx->private = data; |
| 1501 | return 0; |
| 1502 | |
| 1503 | err: |
| 1504 | g_free(data); |
| 1505 | return -1; |
| 1506 | } |
| 1507 | |
| 1508 | static void local_cleanup(FsContext *ctx) |
| 1509 | { |
| 1510 | LocalData *data = ctx->private; |
| 1511 | |
| 1512 | if (!data) { |
| 1513 | return; |
| 1514 | } |
| 1515 | |
| 1516 | close(data->mountfd); |
| 1517 | g_free(data); |
| 1518 | } |
| 1519 | |
| 1520 | static void error_append_security_model_hint(Error *const *errp) |
| 1521 | { |
| 1522 | error_append_hint(errp, "Valid options are: security_model=" |
| 1523 | "[passthrough|mapped-xattr|mapped-file|none]\n"); |
| 1524 | } |
| 1525 | |
| 1526 | static int local_parse_opts(QemuOpts *opts, FsDriverEntry *fse, Error **errp) |
| 1527 | { |
| 1528 | ERRP_GUARD(); |
| 1529 | const char *sec_model = qemu_opt_get(opts, "security_model"); |
| 1530 | const char *path = qemu_opt_get(opts, "path"); |
| 1531 | const char *multidevs = qemu_opt_get(opts, "multidevs"); |
| 1532 | |
| 1533 | uint64_t val = qemu_opt_get_number(opts, "max_xattr", |
| 1534 | V9FS_MAX_XATTR_DEFAULT); |
| 1535 | if (val > UINT32_MAX) { |
| 1536 | error_setg(errp, "max_xattr value '%s' too large", |
| 1537 | qemu_opt_get(opts, "max_xattr")); |
| 1538 | return -1; |
| 1539 | } |
| 1540 | fse->max_xattr = val; |
| 1541 | |
| 1542 | if (!sec_model) { |
| 1543 | error_setg(errp, "security_model property not set"); |
| 1544 | error_append_security_model_hint(errp); |
| 1545 | return -1; |
| 1546 | } |
| 1547 | |
| 1548 | if (!strcmp(sec_model, "passthrough")) { |
| 1549 | fse->export_flags |= V9FS_SM_PASSTHROUGH; |
| 1550 | } else if (!strcmp(sec_model, "mapped") || |
| 1551 | !strcmp(sec_model, "mapped-xattr")) { |
| 1552 | fse->export_flags |= V9FS_SM_MAPPED; |
| 1553 | } else if (!strcmp(sec_model, "none")) { |
| 1554 | fse->export_flags |= V9FS_SM_NONE; |
| 1555 | } else if (!strcmp(sec_model, "mapped-file")) { |
| 1556 | fse->export_flags |= V9FS_SM_MAPPED_FILE; |
| 1557 | } else { |
| 1558 | error_setg(errp, "invalid security_model property '%s'", sec_model); |
| 1559 | error_append_security_model_hint(errp); |
| 1560 | return -1; |
| 1561 | } |
| 1562 | |
| 1563 | if (multidevs) { |
| 1564 | if (!strcmp(multidevs, "remap")) { |
| 1565 | fse->export_flags &= ~V9FS_FORBID_MULTIDEVS; |
| 1566 | fse->export_flags |= V9FS_REMAP_INODES; |
| 1567 | } else if (!strcmp(multidevs, "forbid")) { |
| 1568 | fse->export_flags &= ~V9FS_REMAP_INODES; |
| 1569 | fse->export_flags |= V9FS_FORBID_MULTIDEVS; |
| 1570 | } else if (!strcmp(multidevs, "warn")) { |
| 1571 | fse->export_flags &= ~V9FS_FORBID_MULTIDEVS; |
| 1572 | fse->export_flags &= ~V9FS_REMAP_INODES; |
| 1573 | } else { |
| 1574 | error_setg(errp, "invalid multidevs property '%s'", |
| 1575 | multidevs); |
| 1576 | error_append_hint(errp, "Valid options are: multidevs=" |
| 1577 | "[remap|forbid|warn]\n"); |
| 1578 | return -1; |
| 1579 | } |
| 1580 | } else { |
| 1581 | fse->export_flags &= ~V9FS_FORBID_MULTIDEVS; |
| 1582 | fse->export_flags |= V9FS_REMAP_INODES; |
| 1583 | } |
| 1584 | |
| 1585 | if (!path) { |
| 1586 | error_setg(errp, "path property not set"); |
| 1587 | return -1; |
| 1588 | } |
| 1589 | |
| 1590 | if (fsdev_throttle_parse_opts(opts, &fse->fst, errp)) { |
| 1591 | error_prepend(errp, "invalid throttle configuration: "); |
| 1592 | return -1; |
| 1593 | } |
| 1594 | |
| 1595 | if (fse->export_flags & V9FS_SM_MAPPED || |
| 1596 | fse->export_flags & V9FS_SM_MAPPED_FILE) { |
| 1597 | fse->fmode = |
| 1598 | qemu_opt_get_number(opts, "fmode", SM_LOCAL_MODE_BITS) & 0777; |
| 1599 | fse->dmode = |
| 1600 | qemu_opt_get_number(opts, "dmode", SM_LOCAL_DIR_MODE_BITS) & 0777; |
| 1601 | } else { |
| 1602 | if (qemu_opt_find(opts, "fmode")) { |
| 1603 | error_setg(errp, "fmode is only valid for mapped security modes"); |
| 1604 | return -1; |
| 1605 | } |
| 1606 | if (qemu_opt_find(opts, "dmode")) { |
| 1607 | error_setg(errp, "dmode is only valid for mapped security modes"); |
| 1608 | return -1; |
| 1609 | } |
| 1610 | } |
| 1611 | |
| 1612 | fse->path = g_strdup(path); |
| 1613 | |
| 1614 | return 0; |
| 1615 | } |
| 1616 | |
| 1617 | static bool local_has_valid_file_handle(int fid_type, V9fsFidOpenState *fs) |
| 1618 | { |
| 1619 | return |
| 1620 | (fid_type == P9_FID_FILE && fs->fd != -1) || |
| 1621 | (fid_type == P9_FID_DIR && fs->dir.stream != NULL); |
| 1622 | } |
| 1623 | |
| 1624 | FileOperations local_ops = { |
| 1625 | .parse_opts = local_parse_opts, |
| 1626 | .init = local_init, |
| 1627 | .cleanup = local_cleanup, |
| 1628 | .lstat = local_lstat, |
| 1629 | .readlink = local_readlink, |
| 1630 | .close = local_close, |
| 1631 | .closedir = local_closedir, |
| 1632 | .open = local_open, |
| 1633 | .opendir = local_opendir, |
| 1634 | .rewinddir = local_rewinddir, |
| 1635 | .telldir = local_telldir, |
| 1636 | .readdir = local_readdir, |
| 1637 | .seekdir = local_seekdir, |
| 1638 | .preadv = local_preadv, |
| 1639 | .pwritev = local_pwritev, |
| 1640 | .chmod = local_chmod, |
| 1641 | .mknod = local_mknod, |
| 1642 | .mkdir = local_mkdir, |
| 1643 | .fstat = local_fstat, |
| 1644 | .open2 = local_open2, |
| 1645 | .symlink = local_symlink, |
| 1646 | .link = local_link, |
| 1647 | .truncate = local_truncate, |
| 1648 | .rename = local_rename, |
| 1649 | .chown = local_chown, |
| 1650 | .utimensat = local_utimensat, |
| 1651 | .remove = local_remove, |
| 1652 | .fsync = local_fsync, |
| 1653 | .statfs = local_statfs, |
| 1654 | .lgetxattr = local_lgetxattr, |
| 1655 | .llistxattr = local_llistxattr, |
| 1656 | .lsetxattr = local_lsetxattr, |
| 1657 | .lremovexattr = local_lremovexattr, |
| 1658 | .name_to_path = local_name_to_path, |
| 1659 | .renameat = local_renameat, |
| 1660 | .unlinkat = local_unlinkat, |
| 1661 | .has_valid_file_handle = local_has_valid_file_handle, |
| 1662 | .ftruncate = local_ftruncate, |
| 1663 | .futimens = local_futimens, |
| 1664 | }; |