parseMountOptions takes fstab style mount options and parses them for use with a standard mount() syscall
(options []string)
| 335 | // parseMountOptions takes fstab style mount options and parses them for |
| 336 | // use with a standard mount() syscall |
| 337 | func parseMountOptions(options []string) (opt mountOpt, err error) { |
| 338 | loopOpt := "loop" |
| 339 | flagsMap := map[string]struct { |
| 340 | clear bool |
| 341 | flag int |
| 342 | }{ |
| 343 | "async": {true, unix.MS_SYNCHRONOUS}, |
| 344 | "atime": {true, unix.MS_NOATIME}, |
| 345 | "bind": {false, unix.MS_BIND}, |
| 346 | "defaults": {false, 0}, |
| 347 | "dev": {true, unix.MS_NODEV}, |
| 348 | "diratime": {true, unix.MS_NODIRATIME}, |
| 349 | "dirsync": {false, unix.MS_DIRSYNC}, |
| 350 | "exec": {true, unix.MS_NOEXEC}, |
| 351 | "mand": {false, unix.MS_MANDLOCK}, |
| 352 | "noatime": {false, unix.MS_NOATIME}, |
| 353 | "nodev": {false, unix.MS_NODEV}, |
| 354 | "nodiratime": {false, unix.MS_NODIRATIME}, |
| 355 | "noexec": {false, unix.MS_NOEXEC}, |
| 356 | "nomand": {true, unix.MS_MANDLOCK}, |
| 357 | "norelatime": {true, unix.MS_RELATIME}, |
| 358 | "nostrictatime": {true, unix.MS_STRICTATIME}, |
| 359 | "nosuid": {false, unix.MS_NOSUID}, |
| 360 | "rbind": {false, unix.MS_BIND | unix.MS_REC}, |
| 361 | "relatime": {false, unix.MS_RELATIME}, |
| 362 | "remount": {false, unix.MS_REMOUNT}, |
| 363 | "ro": {false, unix.MS_RDONLY}, |
| 364 | "rw": {true, unix.MS_RDONLY}, |
| 365 | "strictatime": {false, unix.MS_STRICTATIME}, |
| 366 | "suid": {true, unix.MS_NOSUID}, |
| 367 | "sync": {false, unix.MS_SYNCHRONOUS}, |
| 368 | } |
| 369 | for _, o := range options { |
| 370 | // X-containerd.* options are internal mount options that should be processed |
| 371 | // by the mount manager before reaching this layer. |
| 372 | if strings.HasPrefix(o, "X-containerd.") { |
| 373 | return opt, fmt.Errorf("internal mount option %q was not consumed by the mount manager", o) |
| 374 | } |
| 375 | // If the option does not exist in the flags table or the flag |
| 376 | // is not supported on the platform, |
| 377 | // then it is a data value for a specific fs type |
| 378 | if f, exists := flagsMap[o]; exists && f.flag != 0 { |
| 379 | if f.clear { |
| 380 | opt.flags &^= f.flag |
| 381 | } else { |
| 382 | opt.flags |= f.flag |
| 383 | } |
| 384 | } else if o == loopOpt { |
| 385 | opt.losetup = true |
| 386 | } else if after, ok := strings.CutPrefix(o, "uidmap="); ok { |
| 387 | opt.uidmap = after |
| 388 | } else if after, ok := strings.CutPrefix(o, "gidmap="); ok { |
| 389 | opt.gidmap = after |
| 390 | } else { |
| 391 | opt.data = append(opt.data, o) |
| 392 | } |
| 393 | } |
| 394 | return |
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