diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libzfs/libzfs_mount.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/libzfs/libzfs_mount.c b/lib/libzfs/libzfs_mount.c index ac3b68226..0e3332e0e 100644 --- a/lib/libzfs/libzfs_mount.c +++ b/lib/libzfs/libzfs_mount.c @@ -388,6 +388,7 @@ zfs_mount(zfs_handle_t *zhp, const char *options, int flags) struct stat buf; char mountpoint[ZFS_MAXPROPLEN]; char mntopts[MNT_LINE_MAX]; + char overlay[ZFS_MAXPROPLEN]; libzfs_handle_t *hdl = zhp->zfs_hdl; int remount = 0, rc; @@ -442,6 +443,19 @@ zfs_mount(zfs_handle_t *zhp, const char *options, int flags) } /* + * Overlay mounts are disabled by default but may be enabled + * via the 'overlay' property or the 'zfs mount -O' option. + */ + if (!(flags & MS_OVERLAY)) { + if (zfs_prop_get(zhp, ZFS_PROP_OVERLAY, overlay, + sizeof (overlay), NULL, NULL, 0, B_FALSE) == 0) { + if (strcmp(overlay, "on") == 0) { + flags |= MS_OVERLAY; + } + } + } + + /* * Determine if the mountpoint is empty. If so, refuse to perform the * mount. We don't perform this check if 'remount' is * specified or if overlay option(-O) is given |