/*
* Get the label if any of a zfs filesystem. Get the dataset, then
* get its mlslabel property, convert as needed, and return it. If
* there's no mlslabel or it is the default one, return NULL.
*/
static ts_label_t *
getflabel_zfs(vfs_t *vfsp)
{
int error;
ts_label_t *tsl = NULL;
refstr_t *resource_ref;
bslabel_t ds_sl;
char ds_hexsl[MAXNAMELEN];
const char *osname;
resource_ref = vfs_getresource(vfsp);
osname = refstr_value(resource_ref);
error = dsl_prop_get(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
1, sizeof (ds_hexsl), &ds_hexsl, NULL);
refstr_rele(resource_ref);
if ((error) || (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0))
return (NULL);
if (hexstr_to_label(ds_hexsl, &ds_sl) != 0)
return (NULL);
tsl = labelalloc(&ds_sl, default_doi, KM_SLEEP);
return (tsl);
}
/*
* There's no protocol today to obtain the label from the server.
* So we rely on conventions: zones, zone names, and zone paths
* must match across TX servers and their TX clients. Now use
* the exported name to find the equivalent local zone and its
* label. Caller is responsible for doing a label_rele of the
* returned ts_label.
*/
ts_label_t *
getflabel_cipso(vfs_t *vfsp)
{
zone_t *reszone;
zone_t *new_reszone;
char *nfspath, *respath;
refstr_t *resource_ref;
boolean_t treat_abs = B_FALSE;
if (vfsp->vfs_resource == NULL)
return (NULL); /* error */
resource_ref = vfs_getresource(vfsp);
nfspath = (char *)refstr_value(resource_ref);
respath = strchr(nfspath, ':'); /* skip server name */
if (respath)
respath++; /* skip over ":" */
if (*respath != '/') {
/* treat path as absolute but it doesn't have leading '/' */
treat_abs = B_TRUE;
}
reszone = zone_find_by_any_path(respath, treat_abs);
if (reszone == global_zone) {
refstr_rele(resource_ref);
label_hold(l_admin_low);
zone_rele(reszone);
return (l_admin_low);
}
/*
* Skip over zonepath (not including "root"), e.g. /zone/internal
*/
respath += reszone->zone_rootpathlen - 7;
if (treat_abs)
respath--; /* no leading '/' to skip */
if (strncmp(respath, "/root/", 6) == 0) {
/* Check if we now have something like "/zone/public/" */
respath += 5; /* skip "/root" first */
new_reszone = zone_find_by_any_path(respath, B_FALSE);
if (new_reszone != global_zone) {
zone_rele(reszone);
reszone = new_reszone;
} else {
zone_rele(new_reszone);
}
}
refstr_rele(resource_ref);
label_hold(reszone->zone_slabel);
zone_rele(reszone);
return (reszone->zone_slabel);
}
static void
zfsctl_rename_snap(zfsctl_snapdir_t *sdp, zfs_snapentry_t *sep, const char *nm)
{
avl_index_t where;
vfs_t *vfsp;
refstr_t *pathref;
char newpath[MAXNAMELEN];
char *tail;
ASSERT(MUTEX_HELD(&sdp->sd_lock));
ASSERT(sep != NULL);
vfsp = vn_mountedvfs(sep->se_root);
ASSERT(vfsp != NULL);
vfs_lock_wait(vfsp);
/*
* Change the name in the AVL tree.
*/
avl_remove(&sdp->sd_snaps, sep);
kmem_free(sep->se_name, strlen(sep->se_name) + 1);
sep->se_name = kmem_alloc(strlen(nm) + 1, KM_SLEEP);
(void) strcpy(sep->se_name, nm);
VERIFY(avl_find(&sdp->sd_snaps, sep, &where) == NULL);
avl_insert(&sdp->sd_snaps, sep, where);
/*
* Change the current mountpoint info:
* - update the tail of the mntpoint path
* - update the tail of the resource path
*/
pathref = vfs_getmntpoint(vfsp);
(void) strncpy(newpath, refstr_value(pathref), sizeof (newpath));
VERIFY((tail = strrchr(newpath, '/')) != NULL);
*(tail+1) = '\0';
ASSERT3U(strlen(newpath) + strlen(nm), <, sizeof (newpath));
(void) strcat(newpath, nm);
refstr_rele(pathref);
vfs_setmntpoint(vfsp, newpath);
pathref = vfs_getresource(vfsp);
(void) strncpy(newpath, refstr_value(pathref), sizeof (newpath));
VERIFY((tail = strrchr(newpath, '@')) != NULL);
*(tail+1) = '\0';
ASSERT3U(strlen(newpath) + strlen(nm), <, sizeof (newpath));
(void) strcat(newpath, nm);
refstr_rele(pathref);
vfs_setresource(vfsp, newpath);
vfs_unlock(vfsp);
}
