-typedef struct option_map {
- const char *name;
- int mask;
-} option_map_t;
-
-static const option_map_t option_map[] = {
- /* Canonicalized filesystem independent options from mount(8) */
- { MNTOPT_NOAUTO, MS_COMMENT },
- { MNTOPT_DEFAULTS, MS_COMMENT },
- { MNTOPT_NODEVICES, MS_NODEV },
- { MNTOPT_DIRSYNC, MS_DIRSYNC },
- { MNTOPT_NOEXEC, MS_NOEXEC },
- { MNTOPT_GROUP, MS_GROUP },
- { MNTOPT_NETDEV, MS_COMMENT },
- { MNTOPT_NOFAIL, MS_COMMENT },
- { MNTOPT_NOSUID, MS_NOSUID },
- { MNTOPT_OWNER, MS_OWNER },
- { MNTOPT_REMOUNT, MS_REMOUNT },
- { MNTOPT_RO, MS_RDONLY },
- { MNTOPT_SYNC, MS_SYNCHRONOUS },
- { MNTOPT_USER, MS_USERS },
- { MNTOPT_USERS, MS_USERS },
-#ifdef MS_NOATIME
- { MNTOPT_NOATIME, MS_NOATIME },
-#endif
-#ifdef MS_NODIRATIME
- { MNTOPT_NODIRATIME, MS_NODIRATIME },
-#endif
-#ifdef MS_RELATIME
- { MNTOPT_RELATIME, MS_RELATIME },
-#endif
-#ifdef MS_STRICTATIME
- { MNTOPT_DFRATIME, MS_STRICTATIME },
-#endif
-#ifdef HAVE_SELINUX
- { MNTOPT_CONTEXT, MS_COMMENT },
- { MNTOPT_FSCONTEXT, MS_COMMENT },
- { MNTOPT_DEFCONTEXT, MS_COMMENT },
- { MNTOPT_ROOTCONTEXT, MS_COMMENT },
-#endif
-#ifdef MS_I_VERSION
- { MNTOPT_IVERSION, MS_I_VERSION },
-#endif
-#ifdef MS_MANDLOCK
- { MNTOPT_NBMAND, MS_MANDLOCK },
-#endif
- /* Valid options not found in mount(8) */
- { MNTOPT_BIND, MS_BIND },
- { MNTOPT_RBIND, MS_BIND|MS_REC },
- { MNTOPT_COMMENT, MS_COMMENT },
- { MNTOPT_BOOTWAIT, MS_COMMENT },
- { MNTOPT_NOBOOTWAIT, MS_COMMENT },
- { MNTOPT_OPTIONAL, MS_COMMENT },
- { MNTOPT_SHOWTHROUGH, MS_COMMENT },
-#ifdef MS_NOSUB
- { MNTOPT_NOSUB, MS_NOSUB },
-#endif
-#ifdef MS_SILENT
- { MNTOPT_QUIET, MS_SILENT },
-#endif
- /* Custom zfs options */
- { MNTOPT_NOXATTR, MS_COMMENT },
- { NULL, 0 } };
-
-/*
- * Break the mount option in to a name/value pair. The name is
- * validated against the option map and mount flags set accordingly.
- */
-static int
-parse_option(char *mntopt, unsigned long *mntflags, int sloppy)
-{
- const option_map_t *opt;
- char *ptr, *name, *value = NULL;
- int rc;
-
- name = strdup(mntopt);
- if (name == NULL)
- return (ENOMEM);
-
- for (ptr = name; ptr && *ptr; ptr++) {
- if (*ptr == '=') {
- *ptr = '\0';
- value = ptr+1;
- break;
- }
- }
-
- for (opt = option_map; opt->name != NULL; opt++) {
- if (strncmp(name, opt->name, strlen(name)) == 0) {
- *mntflags |= opt->mask;
-
- /* MS_USERS implies default user options */
- if (opt->mask & (MS_USERS))
- *mntflags |= (MS_NOEXEC|MS_NOSUID|MS_NODEV);
-
- /* MS_OWNER|MS_GROUP imply default owner options */
- if (opt->mask & (MS_OWNER | MS_GROUP))
- *mntflags |= (MS_NOSUID|MS_NODEV);
-
- rc = 0;
- goto out;
- }
- }
-
- if (!sloppy)
- rc = ENOENT;
-out:
- /* If required further process on the value may be done here */
- free(name);
- return (rc);
-}
-
-/*
- * Translate the mount option string in to MS_* mount flags for the
- * kernel vfs. When sloppy is non-zero unknown options will be ignored
- * otherwise they are considered fatal are copied in to badopt.
- */
-static int
-parse_options(char *mntopts, unsigned long *mntflags, int sloppy, char *badopt)
-{
- int rc = 0, quote = 0;
- char *ptr, *opt, *opts;
-
- opts = strdup(mntopts);
- if (opts == NULL)
- return (ENOMEM);
-
- *mntflags = 0;
- opt = NULL;
-
- /*
- * Scan through all mount options which must be comma delimited.
- * We must be careful to notice regions which are double quoted
- * and skip commas in these regions. Each option is then checked
- * to determine if it is a known option.
- */
- for (ptr = opts; ptr && *ptr; ptr++) {
- if (opt == NULL)
- opt = ptr;
-
- if (*ptr == '"')
- quote = !quote;
-
- if (quote)
- continue;
-
- if ((*ptr == ',') || (*ptr == '\0')) {
- *ptr = '\0';
- rc = parse_option(opt, mntflags, sloppy);
- if (rc) {
- strcpy(badopt, opt);
- goto out;
- }
-
- opt = NULL;
- }
- }
-out:
- free(opts);
- return (rc);
-}
-
-/*
- * Called when invoked as /sbin/mount.zfs, mount helper for mount(8).
- */
-static int
-manual_mount(int argc, char **argv)
-{
- zfs_handle_t *zhp;
- char legacy[ZFS_MAXPROPLEN];
- char mntopts[MNT_LINE_MAX] = { '\0' };
- char badopt[MNT_LINE_MAX] = { '\0' };
- char *dataset, *mntpoint;
- unsigned long mntflags;
- int sloppy = 0, fake = 0, verbose = 0;
- int rc, c;
-
- /* check options */
- while ((c = getopt(argc, argv, "sfnvo:h?")) != -1) {
- switch (c) {
- case 's':
- sloppy = 1;
- break;
- case 'f':
- fake = 1;
- break;
- case 'n':
- /* Ignored, handled by mount(8) */
- break;
- case 'v':
- verbose++;
- break;
- case 'o':
- (void) strlcpy(mntopts, optarg, sizeof (mntopts));
- break;
- case 'h':
- case '?':
- (void) fprintf(stderr, gettext("Invalid option '%c'\n"),
- optopt);
- (void) fprintf(stderr, gettext("Usage: mount.zfs "
- "[-sfnv] [-o options] <dataset> <mountpoint>\n"));
- return (MOUNT_USAGE);
- }
- }
-
- argc -= optind;
- argv += optind;
-
- /* check that we only have two arguments */
- if (argc != 2) {
- if (argc == 0)
- (void) fprintf(stderr, gettext("missing dataset "
- "argument\n"));
- else if (argc == 1)
- (void) fprintf(stderr,
- gettext("missing mountpoint argument\n"));
- else
- (void) fprintf(stderr, gettext("too many arguments\n"));
- (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
- return (2);
- }
-
- dataset = argv[0];
- path = argv[1];
-
- /* try to open the dataset */
- if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
- return (1);
-
- (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
- sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
-
- /* check for legacy mountpoint and complain appropriately */
- ret = 0;
- if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
- if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS,
- NULL, 0, mntopts, sizeof (mntopts)) != 0) {
- (void) fprintf(stderr, gettext("mount failed: %s\n"),
- strerror(errno));
- ret = 1;
- }
- } else {
- (void) fprintf(stderr, gettext("filesystem '%s' cannot be "
- "mounted using 'mount -F zfs'\n"), dataset);
- (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
- "instead.\n"), path);
- (void) fprintf(stderr, gettext("If you must use 'mount -F zfs' "
- "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n"));
- (void) fprintf(stderr, gettext("See zfs(1M) for more "
- "information.\n"));
- ret = 1;
- }
-
- return (ret);
-}
-
-/*
- * Called when invoked as /etc/fs/zfs/umount. Unlike a manual mount, we allow
- * unmounts of non-legacy filesystems, as this is the dominant administrative
- * interface.
- */
-static int
-manual_unmount(int argc, char **argv)
-{
- int flags = 0;
- int c;
-
- /* check options */
- while ((c = getopt(argc, argv, "f")) != -1) {
- switch (c) {
- case 'f':
- flags = MS_FORCE;
- break;
- case '?':
- (void) fprintf(stderr, gettext("invalid option '%c'\n"),
- optopt);
- (void) fprintf(stderr, gettext("usage: unmount [-f] "
- "<path>\n"));
- return (2);
- }
- }
-
- argc -= optind;
- argv += optind;
-
- /* check arguments */
- if (argc != 1) {
- if (argc == 0)
- (void) fprintf(stderr, gettext("missing path "
- "argument\n"));
- else
- (void) fprintf(stderr, gettext("too many arguments\n"));
- (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
- return (2);
- }
-
- return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
-}
-