Improve ZVOL queue behavior.

[zfs.git] / cmd / mount_zfs / mount_zfs.c

diff --git a/cmd/mount_zfs/mount_zfs.c b/cmd/mount_zfs/mount_zfs.c
index aff9e10..6a2e9ff 100644 (file)
--- a/cmd/mount_zfs/mount_zfs.c
+++ b/cmd/mount_zfs/mount_zfs.c
@@ -96,6 +96,7 @@ static const option_map_t option_map[] = {
        { MNTOPT_QUIET,         MS_SILENT,      ZS_COMMENT      },
 #endif
        /* Custom zfs options */
+       { MNTOPT_XATTR,         MS_COMMENT,     ZS_COMMENT      },
        { MNTOPT_NOXATTR,       MS_COMMENT,     ZS_COMMENT      },
        { MNTOPT_ZFSUTIL,       MS_COMMENT,     ZS_ZFSUTIL      },
        { NULL,                 0,              0               } };
@@ -120,6 +121,7 @@ parse_option(char *mntopt, unsigned long *mntflags,
                if (*ptr == '=') {
                        *ptr = '\0';
                        value = ptr+1;
+                       VERIFY3P(value, !=, NULL);
                        break;
                }
        }
@@ -251,7 +253,7 @@ mtab_is_writeable(void)
        struct stat st;
        int error, fd;
 
-       error = stat(MNTTAB, &st);
+       error = lstat(MNTTAB, &st);
        if (error || S_ISLNK(st.st_mode))
                return (0);
 
@@ -427,15 +429,20 @@ main(int argc, char **argv)
                return (MOUNT_SYSERR);
 
        /* try to open the dataset to access the mount point */
-       if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL) {
+       if ((zhp = zfs_open(g_zfs, dataset,
+           ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT)) == NULL) {
                (void) fprintf(stderr, gettext("filesystem '%s' cannot be "
                    "mounted, unable to open the dataset\n"), dataset);
                libzfs_fini(g_zfs);
                return (MOUNT_USAGE);
        }
 
-       (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, legacy,
-           sizeof (legacy), NULL, NULL, 0, B_FALSE);
+       /* treat all snapshots as legacy mount points */
+       if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT)
+               (void) strlcpy(legacy, ZFS_MOUNTPOINT_LEGACY, ZFS_MAXPROPLEN);
+       else
+               (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, legacy,
+                   sizeof (legacy), NULL, NULL, 0, B_FALSE);
 
        zfs_close(zhp);
        libzfs_fini(g_zfs);