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-rw-r--r--common/zfs/zfs_deleg.c237
1 files changed, 237 insertions, 0 deletions
diff --git a/common/zfs/zfs_deleg.c b/common/zfs/zfs_deleg.c
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index 000000000000..83d9edb21389
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+++ b/common/zfs/zfs_deleg.c
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+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#include <sys/sunddi.h>
+#include <sys/ctype.h>
+#else
+#include <stdio.h>
+#include <unistd.h>
+#include <strings.h>
+#include <libnvpair.h>
+#include <ctype.h>
+#endif
+/* XXX includes zfs_context.h, so why bother with the above? */
+#include <sys/dsl_deleg.h>
+#include "zfs_prop.h"
+#include "zfs_deleg.h"
+#include "zfs_namecheck.h"
+
+/*
+ * permission table
+ *
+ * Keep this table in sorted order
+ *
+ * This table is used for displaying all permissions for
+ * zfs allow
+ */
+
+zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
+ {ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW},
+ {ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
+ {ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
+ {ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
+ {ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
+ {ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
+ {ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
+ {ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
+ {ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
+ {ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
+ {ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
+ {ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_NONE },
+ {ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
+ {ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_NOTE_USERQUOTA },
+ {ZFS_DELEG_PERM_GROUPQUOTA, ZFS_DELEG_NOTE_GROUPQUOTA },
+ {ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_NOTE_USERUSED },
+ {ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_NOTE_GROUPUSED },
+ {ZFS_DELEG_PERM_HOLD, ZFS_DELEG_NOTE_HOLD },
+ {ZFS_DELEG_PERM_RELEASE, ZFS_DELEG_NOTE_RELEASE },
+ {ZFS_DELEG_PERM_DIFF, ZFS_DELEG_NOTE_DIFF},
+ {NULL, ZFS_DELEG_NOTE_NONE }
+};
+
+static int
+zfs_valid_permission_name(const char *perm)
+{
+ if (zfs_deleg_canonicalize_perm(perm))
+ return (0);
+
+ return (permset_namecheck(perm, NULL, NULL));
+}
+
+const char *
+zfs_deleg_canonicalize_perm(const char *perm)
+{
+ int i;
+ zfs_prop_t prop;
+
+ for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
+ if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
+ return (perm);
+ }
+
+ prop = zfs_name_to_prop(perm);
+ if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
+ return (zfs_prop_to_name(prop));
+ return (NULL);
+
+}
+
+static int
+zfs_validate_who(char *who)
+{
+ char *p;
+
+ if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
+ return (-1);
+
+ switch (who[0]) {
+ case ZFS_DELEG_USER:
+ case ZFS_DELEG_GROUP:
+ case ZFS_DELEG_USER_SETS:
+ case ZFS_DELEG_GROUP_SETS:
+ if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
+ return (-1);
+ for (p = &who[3]; *p; p++)
+ if (!isdigit(*p))
+ return (-1);
+ break;
+
+ case ZFS_DELEG_NAMED_SET:
+ case ZFS_DELEG_NAMED_SET_SETS:
+ if (who[1] != ZFS_DELEG_NA)
+ return (-1);
+ return (permset_namecheck(&who[3], NULL, NULL));
+
+ case ZFS_DELEG_CREATE:
+ case ZFS_DELEG_CREATE_SETS:
+ if (who[1] != ZFS_DELEG_NA)
+ return (-1);
+ if (who[3] != '\0')
+ return (-1);
+ break;
+
+ case ZFS_DELEG_EVERYONE:
+ case ZFS_DELEG_EVERYONE_SETS:
+ if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
+ return (-1);
+ if (who[3] != '\0')
+ return (-1);
+ break;
+
+ default:
+ return (-1);
+ }
+
+ return (0);
+}
+
+int
+zfs_deleg_verify_nvlist(nvlist_t *nvp)
+{
+ nvpair_t *who, *perm_name;
+ nvlist_t *perms;
+ int error;
+
+ if (nvp == NULL)
+ return (-1);
+
+ who = nvlist_next_nvpair(nvp, NULL);
+ if (who == NULL)
+ return (-1);
+
+ do {
+ if (zfs_validate_who(nvpair_name(who)))
+ return (-1);
+
+ error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
+
+ if (error && error != ENOENT)
+ return (-1);
+ if (error == ENOENT)
+ continue;
+
+ perm_name = nvlist_next_nvpair(perms, NULL);
+ if (perm_name == NULL) {
+ return (-1);
+ }
+ do {
+ error = zfs_valid_permission_name(
+ nvpair_name(perm_name));
+ if (error)
+ return (-1);
+ } while (perm_name = nvlist_next_nvpair(perms, perm_name));
+ } while (who = nvlist_next_nvpair(nvp, who));
+ return (0);
+}
+
+/*
+ * Construct the base attribute name. The base attribute names
+ * are the "key" to locate the jump objects which contain the actual
+ * permissions. The base attribute names are encoded based on
+ * type of entry and whether it is a local or descendent permission.
+ *
+ * Arguments:
+ * attr - attribute name return string, attribute is assumed to be
+ * ZFS_MAX_DELEG_NAME long.
+ * type - type of entry to construct
+ * inheritchr - inheritance type (local,descendent, or NA for create and
+ * permission set definitions
+ * data - is either a permission set name or a 64 bit uid/gid.
+ */
+void
+zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
+ char inheritchr, void *data)
+{
+ int len = ZFS_MAX_DELEG_NAME;
+ uint64_t *id = data;
+
+ switch (type) {
+ case ZFS_DELEG_USER:
+ case ZFS_DELEG_GROUP:
+ case ZFS_DELEG_USER_SETS:
+ case ZFS_DELEG_GROUP_SETS:
+ (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
+ ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
+ break;
+ case ZFS_DELEG_NAMED_SET_SETS:
+ case ZFS_DELEG_NAMED_SET:
+ (void) snprintf(attr, len, "%c-%c%s", type,
+ ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
+ break;
+ case ZFS_DELEG_CREATE:
+ case ZFS_DELEG_CREATE_SETS:
+ (void) snprintf(attr, len, "%c-%c", type,
+ ZFS_DELEG_FIELD_SEP_CHR);
+ break;
+ case ZFS_DELEG_EVERYONE:
+ case ZFS_DELEG_EVERYONE_SETS:
+ (void) snprintf(attr, len, "%c%c%c", type, inheritchr,
+ ZFS_DELEG_FIELD_SEP_CHR);
+ break;
+ default:
+ ASSERT(!"bad zfs_deleg_who_type_t");
+ }
+}