--- /dev/null
+/*
+ * 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 2008 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/resource.h>
+#include <sys/vfs.h>
+#include <sys/vnode.h>
+#include <sys/sid.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/kmem.h>
+#include <sys/cmn_err.h>
+#include <sys/errno.h>
+#include <sys/unistd.h>
+#include <sys/sdt.h>
+#include <sys/fs/zfs.h>
+#include <sys/mode.h>
+#include <sys/policy.h>
+#include <sys/zfs_znode.h>
+#include <sys/zfs_fuid.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_vfsops.h>
+#include <sys/dmu.h>
+#include <sys/dnode.h>
+#include <sys/zap.h>
+#include "fs/fs_subr.h"
+#include <acl/acl_common.h>
+
+#define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
+#define DENY ACE_ACCESS_DENIED_ACE_TYPE
+#define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
+#define MIN_ACE_TYPE ALLOW
+
+#define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP)
+#define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
+ ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
+#define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
+ ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
+#define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
+ ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
+#define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
+
+#define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
+ ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
+ ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
+ ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
+
+#define WRITE_MASK (WRITE_MASK_DATA|ACE_WRITE_ATTRIBUTES|ACE_WRITE_ACL|\
+ ACE_WRITE_OWNER|ACE_DELETE|ACE_DELETE_CHILD)
+
+#define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
+ ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
+
+#define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
+ ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
+
+#define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \
+ ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE)
+
+#define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER)
+
+#define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\
+ ZFS_ACL_PROTECTED)
+
+#define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\
+ ZFS_ACL_OBJ_ACE)
+
+static uint16_t
+zfs_ace_v0_get_type(void *acep)
+{
+ return (((zfs_oldace_t *)acep)->z_type);
+}
+
+static uint16_t
+zfs_ace_v0_get_flags(void *acep)
+{
+ return (((zfs_oldace_t *)acep)->z_flags);
+}
+
+static uint32_t
+zfs_ace_v0_get_mask(void *acep)
+{
+ return (((zfs_oldace_t *)acep)->z_access_mask);
+}
+
+static uint64_t
+zfs_ace_v0_get_who(void *acep)
+{
+ return (((zfs_oldace_t *)acep)->z_fuid);
+}
+
+static void
+zfs_ace_v0_set_type(void *acep, uint16_t type)
+{
+ ((zfs_oldace_t *)acep)->z_type = type;
+}
+
+static void
+zfs_ace_v0_set_flags(void *acep, uint16_t flags)
+{
+ ((zfs_oldace_t *)acep)->z_flags = flags;
+}
+
+static void
+zfs_ace_v0_set_mask(void *acep, uint32_t mask)
+{
+ ((zfs_oldace_t *)acep)->z_access_mask = mask;
+}
+
+static void
+zfs_ace_v0_set_who(void *acep, uint64_t who)
+{
+ ((zfs_oldace_t *)acep)->z_fuid = who;
+}
+
+/*ARGSUSED*/
+static size_t
+zfs_ace_v0_size(void *acep)
+{
+ return (sizeof (zfs_oldace_t));
+}
+
+static size_t
+zfs_ace_v0_abstract_size(void)
+{
+ return (sizeof (zfs_oldace_t));
+}
+
+static int
+zfs_ace_v0_mask_off(void)
+{
+ return (offsetof(zfs_oldace_t, z_access_mask));
+}
+
+/*ARGSUSED*/
+static int
+zfs_ace_v0_data(void *acep, void **datap)
+{
+ *datap = NULL;
+ return (0);
+}
+
+static acl_ops_t zfs_acl_v0_ops = {
+ zfs_ace_v0_get_mask,
+ zfs_ace_v0_set_mask,
+ zfs_ace_v0_get_flags,
+ zfs_ace_v0_set_flags,
+ zfs_ace_v0_get_type,
+ zfs_ace_v0_set_type,
+ zfs_ace_v0_get_who,
+ zfs_ace_v0_set_who,
+ zfs_ace_v0_size,
+ zfs_ace_v0_abstract_size,
+ zfs_ace_v0_mask_off,
+ zfs_ace_v0_data
+};
+
+static uint16_t
+zfs_ace_fuid_get_type(void *acep)
+{
+ return (((zfs_ace_hdr_t *)acep)->z_type);
+}
+
+static uint16_t
+zfs_ace_fuid_get_flags(void *acep)
+{
+ return (((zfs_ace_hdr_t *)acep)->z_flags);
+}
+
+static uint32_t
+zfs_ace_fuid_get_mask(void *acep)
+{
+ return (((zfs_ace_hdr_t *)acep)->z_access_mask);
+}
+
+static uint64_t
+zfs_ace_fuid_get_who(void *args)
+{
+ uint16_t entry_type;
+ zfs_ace_t *acep = args;
+
+ entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
+
+ if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
+ entry_type == ACE_EVERYONE)
+ return (-1);
+ return (((zfs_ace_t *)acep)->z_fuid);
+}
+
+static void
+zfs_ace_fuid_set_type(void *acep, uint16_t type)
+{
+ ((zfs_ace_hdr_t *)acep)->z_type = type;
+}
+
+static void
+zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
+{
+ ((zfs_ace_hdr_t *)acep)->z_flags = flags;
+}
+
+static void
+zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
+{
+ ((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
+}
+
+static void
+zfs_ace_fuid_set_who(void *arg, uint64_t who)
+{
+ zfs_ace_t *acep = arg;
+
+ uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
+
+ if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
+ entry_type == ACE_EVERYONE)
+ return;
+ acep->z_fuid = who;
+}
+
+static size_t
+zfs_ace_fuid_size(void *acep)
+{
+ zfs_ace_hdr_t *zacep = acep;
+ uint16_t entry_type;
+
+ switch (zacep->z_type) {
+ case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+ case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+ return (sizeof (zfs_object_ace_t));
+ case ALLOW:
+ case DENY:
+ entry_type =
+ (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
+ if (entry_type == ACE_OWNER ||
+ entry_type == OWNING_GROUP ||
+ entry_type == ACE_EVERYONE)
+ return (sizeof (zfs_ace_hdr_t));
+ /*FALLTHROUGH*/
+ default:
+ return (sizeof (zfs_ace_t));
+ }
+}
+
+static size_t
+zfs_ace_fuid_abstract_size(void)
+{
+ return (sizeof (zfs_ace_hdr_t));
+}
+
+static int
+zfs_ace_fuid_mask_off(void)
+{
+ return (offsetof(zfs_ace_hdr_t, z_access_mask));
+}
+
+static int
+zfs_ace_fuid_data(void *acep, void **datap)
+{
+ zfs_ace_t *zacep = acep;
+ zfs_object_ace_t *zobjp;
+
+ switch (zacep->z_hdr.z_type) {
+ case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+ case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+ zobjp = acep;
+ *datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
+ return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
+ default:
+ *datap = NULL;
+ return (0);
+ }
+}
+
+static acl_ops_t zfs_acl_fuid_ops = {
+ zfs_ace_fuid_get_mask,
+ zfs_ace_fuid_set_mask,
+ zfs_ace_fuid_get_flags,
+ zfs_ace_fuid_set_flags,
+ zfs_ace_fuid_get_type,
+ zfs_ace_fuid_set_type,
+ zfs_ace_fuid_get_who,
+ zfs_ace_fuid_set_who,
+ zfs_ace_fuid_size,
+ zfs_ace_fuid_abstract_size,
+ zfs_ace_fuid_mask_off,
+ zfs_ace_fuid_data
+};
+
+static int
+zfs_acl_version(int version)
+{
+ if (version < ZPL_VERSION_FUID)
+ return (ZFS_ACL_VERSION_INITIAL);
+ else
+ return (ZFS_ACL_VERSION_FUID);
+}
+
+static int
+zfs_acl_version_zp(znode_t *zp)
+{
+ return (zfs_acl_version(zp->z_zfsvfs->z_version));
+}
+
+static zfs_acl_t *
+zfs_acl_alloc(int vers)
+{
+ zfs_acl_t *aclp;
+
+ aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP);
+ list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
+ offsetof(zfs_acl_node_t, z_next));
+ aclp->z_version = vers;
+ if (vers == ZFS_ACL_VERSION_FUID)
+ aclp->z_ops = zfs_acl_fuid_ops;
+ else
+ aclp->z_ops = zfs_acl_v0_ops;
+ return (aclp);
+}
+
+static zfs_acl_node_t *
+zfs_acl_node_alloc(size_t bytes)
+{
+ zfs_acl_node_t *aclnode;
+
+ aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP);
+ if (bytes) {
+ aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP);
+ aclnode->z_allocdata = aclnode->z_acldata;
+ aclnode->z_allocsize = bytes;
+ aclnode->z_size = bytes;
+ }
+
+ return (aclnode);
+}
+
+static void
+zfs_acl_node_free(zfs_acl_node_t *aclnode)
+{
+ if (aclnode->z_allocsize)
+ kmem_free(aclnode->z_allocdata, aclnode->z_allocsize);
+ kmem_free(aclnode, sizeof (zfs_acl_node_t));
+}
+
+static void
+zfs_acl_release_nodes(zfs_acl_t *aclp)
+{
+ zfs_acl_node_t *aclnode;
+
+ while (aclnode = list_head(&aclp->z_acl)) {
+ list_remove(&aclp->z_acl, aclnode);
+ zfs_acl_node_free(aclnode);
+ }
+ aclp->z_acl_count = 0;
+ aclp->z_acl_bytes = 0;
+}
+
+void
+zfs_acl_free(zfs_acl_t *aclp)
+{
+ zfs_acl_release_nodes(aclp);
+ list_destroy(&aclp->z_acl);
+ kmem_free(aclp, sizeof (zfs_acl_t));
+}
+
+static boolean_t
+zfs_acl_valid_ace_type(uint_t type, uint_t flags)
+{
+ uint16_t entry_type;
+
+ switch (type) {
+ case ALLOW:
+ case DENY:
+ case ACE_SYSTEM_AUDIT_ACE_TYPE:
+ case ACE_SYSTEM_ALARM_ACE_TYPE:
+ entry_type = flags & ACE_TYPE_FLAGS;
+ return (entry_type == ACE_OWNER ||
+ entry_type == OWNING_GROUP ||
+ entry_type == ACE_EVERYONE || entry_type == 0 ||
+ entry_type == ACE_IDENTIFIER_GROUP);
+ default:
+ if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE)
+ return (B_TRUE);
+ }
+ return (B_FALSE);
+}
+
+static boolean_t
+zfs_ace_valid(vtype_t obj_type, zfs_acl_t *aclp, uint16_t type, uint16_t iflags)
+{
+ /*
+ * first check type of entry
+ */
+
+ if (!zfs_acl_valid_ace_type(type, iflags))
+ return (B_FALSE);
+
+ switch (type) {
+ case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+ case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+ if (aclp->z_version < ZFS_ACL_VERSION_FUID)
+ return (B_FALSE);
+ aclp->z_hints |= ZFS_ACL_OBJ_ACE;
+ }
+
+ /*
+ * next check inheritance level flags
+ */
+
+ if (obj_type == VDIR &&
+ (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
+ aclp->z_hints |= ZFS_INHERIT_ACE;
+
+ if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) {
+ if ((iflags & (ACE_FILE_INHERIT_ACE|
+ ACE_DIRECTORY_INHERIT_ACE)) == 0) {
+ return (B_FALSE);
+ }
+ }
+
+ return (B_TRUE);
+}
+
+static void *
+zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who,
+ uint32_t *access_mask, uint16_t *iflags, uint16_t *type)
+{
+ zfs_acl_node_t *aclnode;
+
+ if (start == NULL) {
+ aclnode = list_head(&aclp->z_acl);
+ if (aclnode == NULL)
+ return (NULL);
+
+ aclp->z_next_ace = aclnode->z_acldata;
+ aclp->z_curr_node = aclnode;
+ aclnode->z_ace_idx = 0;
+ }
+
+ aclnode = aclp->z_curr_node;
+
+ if (aclnode == NULL)
+ return (NULL);
+
+ if (aclnode->z_ace_idx >= aclnode->z_ace_count) {
+ aclnode = list_next(&aclp->z_acl, aclnode);
+ if (aclnode == NULL)
+ return (NULL);
+ else {
+ aclp->z_curr_node = aclnode;
+ aclnode->z_ace_idx = 0;
+ aclp->z_next_ace = aclnode->z_acldata;
+ }
+ }
+
+ if (aclnode->z_ace_idx < aclnode->z_ace_count) {
+ void *acep = aclp->z_next_ace;
+ size_t ace_size;
+
+ /*
+ * Make sure we don't overstep our bounds
+ */
+ ace_size = aclp->z_ops.ace_size(acep);
+
+ if (((caddr_t)acep + ace_size) >
+ ((caddr_t)aclnode->z_acldata + aclnode->z_size)) {
+ return (NULL);
+ }
+
+ *iflags = aclp->z_ops.ace_flags_get(acep);
+ *type = aclp->z_ops.ace_type_get(acep);
+ *access_mask = aclp->z_ops.ace_mask_get(acep);
+ *who = aclp->z_ops.ace_who_get(acep);
+ aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size;
+ aclnode->z_ace_idx++;
+ return ((void *)acep);
+ }
+ return (NULL);
+}
+
+/*ARGSUSED*/
+static uint64_t
+zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt,
+ uint16_t *flags, uint16_t *type, uint32_t *mask)
+{
+ zfs_acl_t *aclp = datap;
+ zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie;
+ uint64_t who;
+
+ acep = zfs_acl_next_ace(aclp, acep, &who, mask,
+ flags, type);
+ return ((uint64_t)(uintptr_t)acep);
+}
+
+static zfs_acl_node_t *
+zfs_acl_curr_node(zfs_acl_t *aclp)
+{
+ ASSERT(aclp->z_curr_node);
+ return (aclp->z_curr_node);
+}
+
+/*
+ * Copy ACE to internal ZFS format.
+ * While processing the ACL each ACE will be validated for correctness.
+ * ACE FUIDs will be created later.
+ */
+int
+zfs_copy_ace_2_fuid(vtype_t obj_type, zfs_acl_t *aclp, void *datap,
+ zfs_ace_t *z_acl, int aclcnt, size_t *size)
+{
+ int i;
+ uint16_t entry_type;
+ zfs_ace_t *aceptr = z_acl;
+ ace_t *acep = datap;
+ zfs_object_ace_t *zobjacep;
+ ace_object_t *aceobjp;
+
+ for (i = 0; i != aclcnt; i++) {
+ aceptr->z_hdr.z_access_mask = acep->a_access_mask;
+ aceptr->z_hdr.z_flags = acep->a_flags;
+ aceptr->z_hdr.z_type = acep->a_type;
+ entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
+ if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
+ entry_type != ACE_EVERYONE) {
+ if (!aclp->z_has_fuids)
+ aclp->z_has_fuids = IS_EPHEMERAL(acep->a_who);
+ aceptr->z_fuid = (uint64_t)acep->a_who;
+ }
+
+ /*
+ * Make sure ACE is valid
+ */
+ if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type,
+ aceptr->z_hdr.z_flags) != B_TRUE)
+ return (EINVAL);
+
+ switch (acep->a_type) {
+ case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+ case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+ zobjacep = (zfs_object_ace_t *)aceptr;
+ aceobjp = (ace_object_t *)acep;
+
+ bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
+ sizeof (aceobjp->a_obj_type));
+ bcopy(aceobjp->a_inherit_obj_type,
+ zobjacep->z_inherit_type,
+ sizeof (aceobjp->a_inherit_obj_type));
+ acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
+ break;
+ default:
+ acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
+ }
+
+ aceptr = (zfs_ace_t *)((caddr_t)aceptr +
+ aclp->z_ops.ace_size(aceptr));
+ }
+
+ *size = (caddr_t)aceptr - (caddr_t)z_acl;
+
+ return (0);
+}
+
+/*
+ * Copy ZFS ACEs to fixed size ace_t layout
+ */
+static void
+zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr,
+ void *datap, int filter)
+{
+ uint64_t who;
+ uint32_t access_mask;
+ uint16_t iflags, type;
+ zfs_ace_hdr_t *zacep = NULL;
+ ace_t *acep = datap;
+ ace_object_t *objacep;
+ zfs_object_ace_t *zobjacep;
+ size_t ace_size;
+ uint16_t entry_type;
+
+ while (zacep = zfs_acl_next_ace(aclp, zacep,
+ &who, &access_mask, &iflags, &type)) {
+
+ switch (type) {
+ case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+ case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+ if (filter) {
+ continue;
+ }
+ zobjacep = (zfs_object_ace_t *)zacep;
+ objacep = (ace_object_t *)acep;
+ bcopy(zobjacep->z_object_type,
+ objacep->a_obj_type,
+ sizeof (zobjacep->z_object_type));
+ bcopy(zobjacep->z_inherit_type,
+ objacep->a_inherit_obj_type,
+ sizeof (zobjacep->z_inherit_type));
+ ace_size = sizeof (ace_object_t);
+ break;
+ default:
+ ace_size = sizeof (ace_t);
+ break;
+ }
+
+ entry_type = (iflags & ACE_TYPE_FLAGS);
+ if ((entry_type != ACE_OWNER &&
+ entry_type != OWNING_GROUP &&
+ entry_type != ACE_EVERYONE)) {
+ acep->a_who = zfs_fuid_map_id(zfsvfs, who,
+ cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
+ ZFS_ACE_GROUP : ZFS_ACE_USER);
+ } else {
+ acep->a_who = (uid_t)(int64_t)who;
+ }
+ acep->a_access_mask = access_mask;
+ acep->a_flags = iflags;
+ acep->a_type = type;
+ acep = (ace_t *)((caddr_t)acep + ace_size);
+ }
+}
+
+static int
+zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep,
+ zfs_oldace_t *z_acl, int aclcnt, size_t *size)
+{
+ int i;
+ zfs_oldace_t *aceptr = z_acl;
+
+ for (i = 0; i != aclcnt; i++, aceptr++) {
+ aceptr->z_access_mask = acep[i].a_access_mask;
+ aceptr->z_type = acep[i].a_type;
+ aceptr->z_flags = acep[i].a_flags;
+ aceptr->z_fuid = acep[i].a_who;
+ /*
+ * Make sure ACE is valid
+ */
+ if (zfs_ace_valid(obj_type, aclp, aceptr->z_type,
+ aceptr->z_flags) != B_TRUE)
+ return (EINVAL);
+ }
+ *size = (caddr_t)aceptr - (caddr_t)z_acl;
+ return (0);
+}
+
+/*
+ * convert old ACL format to new
+ */
+void
+zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp)
+{
+ zfs_oldace_t *oldaclp;
+ int i;
+ uint16_t type, iflags;
+ uint32_t access_mask;
+ uint64_t who;
+ void *cookie = NULL;
+ zfs_acl_node_t *newaclnode;
+
+ ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
+ /*
+ * First create the ACE in a contiguous piece of memory
+ * for zfs_copy_ace_2_fuid().
+ *
+ * We only convert an ACL once, so this won't happen
+ * everytime.
+ */
+ oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
+ KM_SLEEP);
+ i = 0;
+ while (cookie = zfs_acl_next_ace(aclp, cookie, &who,
+ &access_mask, &iflags, &type)) {
+ oldaclp[i].z_flags = iflags;
+ oldaclp[i].z_type = type;
+ oldaclp[i].z_fuid = who;
+ oldaclp[i++].z_access_mask = access_mask;
+ }
+
+ newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
+ sizeof (zfs_object_ace_t));
+ aclp->z_ops = zfs_acl_fuid_ops;
+ VERIFY(zfs_copy_ace_2_fuid(ZTOV(zp)->v_type, aclp, oldaclp,
+ newaclnode->z_acldata, aclp->z_acl_count,
+ &newaclnode->z_size) == 0);
+ newaclnode->z_ace_count = aclp->z_acl_count;
+ aclp->z_version = ZFS_ACL_VERSION;
+ kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
+
+ /*
+ * Release all previous ACL nodes
+ */
+
+ zfs_acl_release_nodes(aclp);
+
+ list_insert_head(&aclp->z_acl, newaclnode);
+
+ aclp->z_acl_bytes = newaclnode->z_size;
+ aclp->z_acl_count = newaclnode->z_ace_count;
+
+}
+
+/*
+ * Convert unix access mask to v4 access mask
+ */
+static uint32_t
+zfs_unix_to_v4(uint32_t access_mask)
+{
+ uint32_t new_mask = 0;
+
+ if (access_mask & S_IXOTH)
+ new_mask |= ACE_EXECUTE;
+ if (access_mask & S_IWOTH)
+ new_mask |= ACE_WRITE_DATA;
+ if (access_mask & S_IROTH)
+ new_mask |= ACE_READ_DATA;
+ return (new_mask);
+}
+
+static void
+zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
+ uint16_t access_type, uint64_t fuid, uint16_t entry_type)
+{
+ uint16_t type = entry_type & ACE_TYPE_FLAGS;
+
+ aclp->z_ops.ace_mask_set(acep, access_mask);
+ aclp->z_ops.ace_type_set(acep, access_type);
+ aclp->z_ops.ace_flags_set(acep, entry_type);
+ if ((type != ACE_OWNER && type != OWNING_GROUP &&
+ type != ACE_EVERYONE))
+ aclp->z_ops.ace_who_set(acep, fuid);
+}
+
+/*
+ * Determine mode of file based on ACL.
+ * Also, create FUIDs for any User/Group ACEs
+ */
+static uint64_t
+zfs_mode_fuid_compute(znode_t *zp, zfs_acl_t *aclp, cred_t *cr,
+ zfs_fuid_info_t **fuidp, dmu_tx_t *tx)
+{
+ int entry_type;
+ mode_t mode;
+ mode_t seen = 0;
+ zfs_ace_hdr_t *acep = NULL;
+ uint64_t who;
+ uint16_t iflags, type;
+ uint32_t access_mask;
+
+ mode = (zp->z_phys->zp_mode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
+
+ while (acep = zfs_acl_next_ace(aclp, acep, &who,
+ &access_mask, &iflags, &type)) {
+
+ if (!zfs_acl_valid_ace_type(type, iflags))
+ continue;
+
+ entry_type = (iflags & ACE_TYPE_FLAGS);
+
+ /*
+ * Skip over owner@, group@ or everyone@ inherit only ACEs
+ */
+ if ((iflags & ACE_INHERIT_ONLY_ACE) &&
+ (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
+ entry_type == OWNING_GROUP))
+ continue;
+
+ if (entry_type == ACE_OWNER) {
+ if ((access_mask & ACE_READ_DATA) &&
+ (!(seen & S_IRUSR))) {
+ seen |= S_IRUSR;
+ if (type == ALLOW) {
+ mode |= S_IRUSR;
+ }
+ }
+ if ((access_mask & ACE_WRITE_DATA) &&
+ (!(seen & S_IWUSR))) {
+ seen |= S_IWUSR;
+ if (type == ALLOW) {
+ mode |= S_IWUSR;
+ }
+ }
+ if ((access_mask & ACE_EXECUTE) &&
+ (!(seen & S_IXUSR))) {
+ seen |= S_IXUSR;
+ if (type == ALLOW) {
+ mode |= S_IXUSR;
+ }
+ }
+ } else if (entry_type == OWNING_GROUP) {
+ if ((access_mask & ACE_READ_DATA) &&
+ (!(seen & S_IRGRP))) {
+ seen |= S_IRGRP;
+ if (type == ALLOW) {
+ mode |= S_IRGRP;
+ }
+ }
+ if ((access_mask & ACE_WRITE_DATA) &&
+ (!(seen & S_IWGRP))) {
+ seen |= S_IWGRP;
+ if (type == ALLOW) {
+ mode |= S_IWGRP;
+ }
+ }
+ if ((access_mask & ACE_EXECUTE) &&
+ (!(seen & S_IXGRP))) {
+ seen |= S_IXGRP;
+ if (type == ALLOW) {
+ mode |= S_IXGRP;
+ }
+ }
+ } else if (entry_type == ACE_EVERYONE) {
+ if ((access_mask & ACE_READ_DATA)) {
+ if (!(seen & S_IRUSR)) {
+ seen |= S_IRUSR;
+ if (type == ALLOW) {
+ mode |= S_IRUSR;
+ }
+ }
+ if (!(seen & S_IRGRP)) {
+ seen |= S_IRGRP;
+ if (type == ALLOW) {
+ mode |= S_IRGRP;
+ }
+ }
+ if (!(seen & S_IROTH)) {
+ seen |= S_IROTH;
+ if (type == ALLOW) {
+ mode |= S_IROTH;
+ }
+ }
+ }
+ if ((access_mask & ACE_WRITE_DATA)) {
+ if (!(seen & S_IWUSR)) {
+ seen |= S_IWUSR;
+ if (type == ALLOW) {
+ mode |= S_IWUSR;
+ }
+ }
+ if (!(seen & S_IWGRP)) {
+ seen |= S_IWGRP;
+ if (type == ALLOW) {
+ mode |= S_IWGRP;
+ }
+ }
+ if (!(seen & S_IWOTH)) {
+ seen |= S_IWOTH;
+ if (type == ALLOW) {
+ mode |= S_IWOTH;
+ }
+ }
+ }
+ if ((access_mask & ACE_EXECUTE)) {
+ if (!(seen & S_IXUSR)) {
+ seen |= S_IXUSR;
+ if (type == ALLOW) {
+ mode |= S_IXUSR;
+ }
+ }
+ if (!(seen & S_IXGRP)) {
+ seen |= S_IXGRP;
+ if (type == ALLOW) {
+ mode |= S_IXGRP;
+ }
+ }
+ if (!(seen & S_IXOTH)) {
+ seen |= S_IXOTH;
+ if (type == ALLOW) {
+ mode |= S_IXOTH;
+ }
+ }
+ }
+ }
+ /*
+ * Now handle FUID create for user/group ACEs
+ */
+ if (entry_type == 0 || entry_type == ACE_IDENTIFIER_GROUP) {
+ aclp->z_ops.ace_who_set(acep,
+ zfs_fuid_create(zp->z_zfsvfs, who, cr,
+ (entry_type == 0) ? ZFS_ACE_USER : ZFS_ACE_GROUP,
+ tx, fuidp));
+ }
+ }
+ return (mode);
+}
+
+static zfs_acl_t *
+zfs_acl_node_read_internal(znode_t *zp, boolean_t will_modify)
+{
+ zfs_acl_t *aclp;
+ zfs_acl_node_t *aclnode;
+
+ aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
+
+ /*
+ * Version 0 to 1 znode_acl_phys has the size/count fields swapped.
+ * Version 0 didn't have a size field, only a count.
+ */
+ if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
+ aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_size;
+ aclp->z_acl_bytes = ZFS_ACL_SIZE(aclp->z_acl_count);
+ } else {
+ aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_count;
+ aclp->z_acl_bytes = zp->z_phys->zp_acl.z_acl_size;
+ }
+
+ aclnode = zfs_acl_node_alloc(will_modify ? aclp->z_acl_bytes : 0);
+ aclnode->z_ace_count = aclp->z_acl_count;
+ if (will_modify) {
+ bcopy(zp->z_phys->zp_acl.z_ace_data, aclnode->z_acldata,
+ aclp->z_acl_bytes);
+ } else {
+ aclnode->z_size = aclp->z_acl_bytes;
+ aclnode->z_acldata = &zp->z_phys->zp_acl.z_ace_data[0];
+ }
+
+ list_insert_head(&aclp->z_acl, aclnode);
+
+ return (aclp);
+}
+
+/*
+ * Read an external acl object.
+ */
+static int
+zfs_acl_node_read(znode_t *zp, zfs_acl_t **aclpp, boolean_t will_modify)
+{
+ uint64_t extacl = zp->z_phys->zp_acl.z_acl_extern_obj;
+ zfs_acl_t *aclp;
+ size_t aclsize;
+ size_t acl_count;
+ zfs_acl_node_t *aclnode;
+ int error;
+
+ ASSERT(MUTEX_HELD(&zp->z_acl_lock));
+
+ if (zp->z_phys->zp_acl.z_acl_extern_obj == 0) {
+ *aclpp = zfs_acl_node_read_internal(zp, will_modify);
+ return (0);
+ }
+
+ aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
+ if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
+ zfs_acl_phys_v0_t *zacl0 =
+ (zfs_acl_phys_v0_t *)&zp->z_phys->zp_acl;
+
+ aclsize = ZFS_ACL_SIZE(zacl0->z_acl_count);
+ acl_count = zacl0->z_acl_count;
+ } else {
+ aclsize = zp->z_phys->zp_acl.z_acl_size;
+ acl_count = zp->z_phys->zp_acl.z_acl_count;
+ if (aclsize == 0)
+ aclsize = acl_count * sizeof (zfs_ace_t);
+ }
+ aclnode = zfs_acl_node_alloc(aclsize);
+ list_insert_head(&aclp->z_acl, aclnode);
+ error = dmu_read(zp->z_zfsvfs->z_os, extacl, 0,
+ aclsize, aclnode->z_acldata);
+ aclnode->z_ace_count = acl_count;
+ aclp->z_acl_count = acl_count;
+ aclp->z_acl_bytes = aclsize;
+
+ if (error != 0) {
+ zfs_acl_free(aclp);
+ /* convert checksum errors into IO errors */
+ if (error == ECKSUM)
+ error = EIO;
+ return (error);
+ }
+
+ *aclpp = aclp;
+ return (0);
+}
+
+/*
+ * common code for setting ACLs.
+ *
+ * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
+ * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
+ * already checked the acl and knows whether to inherit.
+ */
+int
+zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr,
+ zfs_fuid_info_t **fuidp, dmu_tx_t *tx)
+{
+ int error;
+ znode_phys_t *zphys = zp->z_phys;
+ zfs_acl_phys_t *zacl = &zphys->zp_acl;
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ uint64_t aoid = zphys->zp_acl.z_acl_extern_obj;
+ uint64_t off = 0;
+ dmu_object_type_t otype;
+ zfs_acl_node_t *aclnode;
+
+ ASSERT(MUTEX_HELD(&zp->z_lock));
+ ASSERT(MUTEX_HELD(&zp->z_acl_lock));
+
+ dmu_buf_will_dirty(zp->z_dbuf, tx);
+
+ zphys->zp_mode = zfs_mode_fuid_compute(zp, aclp, cr, fuidp, tx);
+
+ /*
+ * Decide which opbject type to use. If we are forced to
+ * use old ACL format than transform ACL into zfs_oldace_t
+ * layout.
+ */
+ if (!zfsvfs->z_use_fuids) {
+ otype = DMU_OT_OLDACL;
+ } else {
+ if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
+ (zfsvfs->z_version >= ZPL_VERSION_FUID))
+ zfs_acl_xform(zp, aclp);
+ ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
+ otype = DMU_OT_ACL;
+ }
+
+ if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ /*
+ * If ACL was previously external and we are now
+ * converting to new ACL format then release old
+ * ACL object and create a new one.
+ */
+ if (aoid && aclp->z_version != zacl->z_acl_version) {
+ error = dmu_object_free(zfsvfs->z_os,
+ zp->z_phys->zp_acl.z_acl_extern_obj, tx);
+ if (error)
+ return (error);
+ aoid = 0;
+ }
+ if (aoid == 0) {
+ aoid = dmu_object_alloc(zfsvfs->z_os,
+ otype, aclp->z_acl_bytes,
+ otype == DMU_OT_ACL ? DMU_OT_SYSACL : DMU_OT_NONE,
+ otype == DMU_OT_ACL ? DN_MAX_BONUSLEN : 0, tx);
+ } else {
+ (void) dmu_object_set_blocksize(zfsvfs->z_os, aoid,
+ aclp->z_acl_bytes, 0, tx);
+ }
+ zphys->zp_acl.z_acl_extern_obj = aoid;
+ for (aclnode = list_head(&aclp->z_acl); aclnode;
+ aclnode = list_next(&aclp->z_acl, aclnode)) {
+ if (aclnode->z_ace_count == 0)
+ continue;
+ dmu_write(zfsvfs->z_os, aoid, off,
+ aclnode->z_size, aclnode->z_acldata, tx);
+ off += aclnode->z_size;
+ }
+ } else {
+ void *start = zacl->z_ace_data;
+ /*
+ * Migrating back embedded?
+ */
+ if (zphys->zp_acl.z_acl_extern_obj) {
+ error = dmu_object_free(zfsvfs->z_os,
+ zp->z_phys->zp_acl.z_acl_extern_obj, tx);
+ if (error)
+ return (error);
+ zphys->zp_acl.z_acl_extern_obj = 0;
+ }
+
+ for (aclnode = list_head(&aclp->z_acl); aclnode;
+ aclnode = list_next(&aclp->z_acl, aclnode)) {
+ if (aclnode->z_ace_count == 0)
+ continue;
+ bcopy(aclnode->z_acldata, start, aclnode->z_size);
+ start = (caddr_t)start + aclnode->z_size;
+ }
+ }
+
+ /*
+ * If Old version then swap count/bytes to match old
+ * layout of znode_acl_phys_t.
+ */
+ if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
+ zphys->zp_acl.z_acl_size = aclp->z_acl_count;
+ zphys->zp_acl.z_acl_count = aclp->z_acl_bytes;
+ } else {
+ zphys->zp_acl.z_acl_size = aclp->z_acl_bytes;
+ zphys->zp_acl.z_acl_count = aclp->z_acl_count;
+ }
+
+ zphys->zp_acl.z_acl_version = aclp->z_version;
+
+ /*
+ * Replace ACL wide bits, but first clear them.
+ */
+ zp->z_phys->zp_flags &= ~ZFS_ACL_WIDE_FLAGS;
+
+ zp->z_phys->zp_flags |= aclp->z_hints;
+
+ if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
+ zp->z_phys->zp_flags |= ZFS_ACL_TRIVIAL;
+
+ zfs_time_stamper_locked(zp, STATE_CHANGED, tx);
+ return (0);
+}
+
+/*
+ * Update access mask for prepended ACE
+ *
+ * This applies the "groupmask" value for aclmode property.
+ */
+static void
+zfs_acl_prepend_fixup(zfs_acl_t *aclp, void *acep, void *origacep,
+ mode_t mode, uint64_t owner)
+{
+ int rmask, wmask, xmask;
+ int user_ace;
+ uint16_t aceflags;
+ uint32_t origmask, acepmask;
+ uint64_t fuid;
+
+ aceflags = aclp->z_ops.ace_flags_get(acep);
+ fuid = aclp->z_ops.ace_who_get(acep);
+ origmask = aclp->z_ops.ace_mask_get(origacep);
+ acepmask = aclp->z_ops.ace_mask_get(acep);
+
+ user_ace = (!(aceflags &
+ (ACE_OWNER|ACE_GROUP|ACE_IDENTIFIER_GROUP)));
+
+ if (user_ace && (fuid == owner)) {
+ rmask = S_IRUSR;
+ wmask = S_IWUSR;
+ xmask = S_IXUSR;
+ } else {
+ rmask = S_IRGRP;
+ wmask = S_IWGRP;
+ xmask = S_IXGRP;
+ }
+
+ if (origmask & ACE_READ_DATA) {
+ if (mode & rmask) {
+ acepmask &= ~ACE_READ_DATA;
+ } else {
+ acepmask |= ACE_READ_DATA;
+ }
+ }
+
+ if (origmask & ACE_WRITE_DATA) {
+ if (mode & wmask) {
+ acepmask &= ~ACE_WRITE_DATA;
+ } else {
+ acepmask |= ACE_WRITE_DATA;
+ }
+ }
+
+ if (origmask & ACE_APPEND_DATA) {
+ if (mode & wmask) {
+ acepmask &= ~ACE_APPEND_DATA;
+ } else {
+ acepmask |= ACE_APPEND_DATA;
+ }
+ }
+
+ if (origmask & ACE_EXECUTE) {
+ if (mode & xmask) {
+ acepmask &= ~ACE_EXECUTE;
+ } else {
+ acepmask |= ACE_EXECUTE;
+ }
+ }
+ aclp->z_ops.ace_mask_set(acep, acepmask);
+}
+
+/*
+ * Apply mode to canonical six ACEs.
+ */
+static void
+zfs_acl_fixup_canonical_six(zfs_acl_t *aclp, mode_t mode)
+{
+ zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
+ void *acep;
+ int maskoff = aclp->z_ops.ace_mask_off();
+ size_t abstract_size = aclp->z_ops.ace_abstract_size();
+
+ ASSERT(aclnode != NULL);
+
+ acep = (void *)((caddr_t)aclnode->z_acldata +
+ aclnode->z_size - (abstract_size * 6));
+
+ /*
+ * Fixup final ACEs to match the mode
+ */
+
+ adjust_ace_pair_common(acep, maskoff, abstract_size,
+ (mode & 0700) >> 6); /* owner@ */
+
+ acep = (caddr_t)acep + (abstract_size * 2);
+
+ adjust_ace_pair_common(acep, maskoff, abstract_size,
+ (mode & 0070) >> 3); /* group@ */
+
+ acep = (caddr_t)acep + (abstract_size * 2);
+ adjust_ace_pair_common(acep, maskoff,
+ abstract_size, mode); /* everyone@ */
+}
+
+
+static int
+zfs_acl_ace_match(zfs_acl_t *aclp, void *acep, int allow_deny,
+ int entry_type, int accessmask)
+{
+ uint32_t mask = aclp->z_ops.ace_mask_get(acep);
+ uint16_t type = aclp->z_ops.ace_type_get(acep);
+ uint16_t flags = aclp->z_ops.ace_flags_get(acep);
+
+ return (mask == accessmask && type == allow_deny &&
+ ((flags & ACE_TYPE_FLAGS) == entry_type));
+}
+
+/*
+ * Can prepended ACE be reused?
+ */
+static int
+zfs_reuse_deny(zfs_acl_t *aclp, void *acep, void *prevacep)
+{
+ int okay_masks;
+ uint16_t prevtype;
+ uint16_t prevflags;
+ uint16_t flags;
+ uint32_t mask, prevmask;
+
+ if (prevacep == NULL)
+ return (B_FALSE);
+
+ prevtype = aclp->z_ops.ace_type_get(prevacep);
+ prevflags = aclp->z_ops.ace_flags_get(prevacep);
+ flags = aclp->z_ops.ace_flags_get(acep);
+ mask = aclp->z_ops.ace_mask_get(acep);
+ prevmask = aclp->z_ops.ace_mask_get(prevacep);
+
+ if (prevtype != DENY)
+ return (B_FALSE);
+
+ if (prevflags != (flags & ACE_IDENTIFIER_GROUP))
+ return (B_FALSE);
+
+ okay_masks = (mask & OKAY_MASK_BITS);
+
+ if (prevmask & ~okay_masks)
+ return (B_FALSE);
+
+ return (B_TRUE);
+}
+
+
+/*
+ * Insert new ACL node into chain of zfs_acl_node_t's
+ *
+ * This will result in two possible results.
+ * 1. If the ACL is currently just a single zfs_acl_node and
+ * we are prepending the entry then current acl node will have
+ * a new node inserted above it.
+ *
+ * 2. If we are inserting in the middle of current acl node then
+ * the current node will be split in two and new node will be inserted
+ * in between the two split nodes.
+ */
+static zfs_acl_node_t *
+zfs_acl_ace_insert(zfs_acl_t *aclp, void *acep)
+{
+ zfs_acl_node_t *newnode;
+ zfs_acl_node_t *trailernode = NULL;
+ zfs_acl_node_t *currnode = zfs_acl_curr_node(aclp);
+ int curr_idx = aclp->z_curr_node->z_ace_idx;
+ int trailer_count;
+ size_t oldsize;
+
+ newnode = zfs_acl_node_alloc(aclp->z_ops.ace_size(acep));
+ newnode->z_ace_count = 1;
+
+ oldsize = currnode->z_size;
+
+ if (curr_idx != 1) {
+ trailernode = zfs_acl_node_alloc(0);
+ trailernode->z_acldata = acep;
+
+ trailer_count = currnode->z_ace_count - curr_idx + 1;
+ currnode->z_ace_count = curr_idx - 1;
+ currnode->z_size = (caddr_t)acep - (caddr_t)currnode->z_acldata;
+ trailernode->z_size = oldsize - currnode->z_size;
+ trailernode->z_ace_count = trailer_count;
+ }
+
+ aclp->z_acl_count += 1;
+ aclp->z_acl_bytes += aclp->z_ops.ace_size(acep);
+
+ if (curr_idx == 1)
+ list_insert_before(&aclp->z_acl, currnode, newnode);
+ else
+ list_insert_after(&aclp->z_acl, currnode, newnode);
+ if (trailernode) {
+ list_insert_after(&aclp->z_acl, newnode, trailernode);
+ aclp->z_curr_node = trailernode;
+ trailernode->z_ace_idx = 1;
+ }
+
+ return (newnode);
+}
+
+/*
+ * Prepend deny ACE
+ */
+static void *
+zfs_acl_prepend_deny(znode_t *zp, zfs_acl_t *aclp, void *acep,
+ mode_t mode)
+{
+ zfs_acl_node_t *aclnode;
+ void *newacep;
+ uint64_t fuid;
+ uint16_t flags;
+
+ aclnode = zfs_acl_ace_insert(aclp, acep);
+ newacep = aclnode->z_acldata;
+ fuid = aclp->z_ops.ace_who_get(acep);
+ flags = aclp->z_ops.ace_flags_get(acep);
+ zfs_set_ace(aclp, newacep, 0, DENY, fuid, (flags & ACE_TYPE_FLAGS));
+ zfs_acl_prepend_fixup(aclp, newacep, acep, mode, zp->z_phys->zp_uid);
+
+ return (newacep);
+}
+
+/*
+ * Split an inherited ACE into inherit_only ACE
+ * and original ACE with inheritance flags stripped off.
+ */
+static void
+zfs_acl_split_ace(zfs_acl_t *aclp, zfs_ace_hdr_t *acep)
+{
+ zfs_acl_node_t *aclnode;
+ zfs_acl_node_t *currnode;
+ void *newacep;
+ uint16_t type, flags;
+ uint32_t mask;
+ uint64_t fuid;
+
+ type = aclp->z_ops.ace_type_get(acep);
+ flags = aclp->z_ops.ace_flags_get(acep);
+ mask = aclp->z_ops.ace_mask_get(acep);
+ fuid = aclp->z_ops.ace_who_get(acep);
+
+ aclnode = zfs_acl_ace_insert(aclp, acep);
+ newacep = aclnode->z_acldata;
+
+ aclp->z_ops.ace_type_set(newacep, type);
+ aclp->z_ops.ace_flags_set(newacep, flags | ACE_INHERIT_ONLY_ACE);
+ aclp->z_ops.ace_mask_set(newacep, mask);
+ aclp->z_ops.ace_type_set(newacep, type);
+ aclp->z_ops.ace_who_set(newacep, fuid);
+ aclp->z_next_ace = acep;
+ flags &= ~ALL_INHERIT;
+ aclp->z_ops.ace_flags_set(acep, flags);
+ currnode = zfs_acl_curr_node(aclp);
+ ASSERT(currnode->z_ace_idx >= 1);
+ currnode->z_ace_idx -= 1;
+}
+
+/*
+ * Are ACES started at index i, the canonical six ACES?
+ */
+static int
+zfs_have_canonical_six(zfs_acl_t *aclp)
+{
+ void *acep;
+ zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
+ int i = 0;
+ size_t abstract_size = aclp->z_ops.ace_abstract_size();
+
+ ASSERT(aclnode != NULL);
+
+ if (aclnode->z_ace_count < 6)
+ return (0);
+
+ acep = (void *)((caddr_t)aclnode->z_acldata +
+ aclnode->z_size - (aclp->z_ops.ace_abstract_size() * 6));
+
+ if ((zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
+ DENY, ACE_OWNER, 0) &&
+ zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
+ ALLOW, ACE_OWNER, OWNER_ALLOW_MASK) &&
+ zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), DENY,
+ OWNING_GROUP, 0) && zfs_acl_ace_match(aclp, (caddr_t)acep +
+ (abstract_size * i++),
+ ALLOW, OWNING_GROUP, 0) &&
+ zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
+ DENY, ACE_EVERYONE, EVERYONE_DENY_MASK) &&
+ zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
+ ALLOW, ACE_EVERYONE, EVERYONE_ALLOW_MASK))) {
+ return (1);
+ } else {
+ return (0);
+ }
+}
+
+
+/*
+ * Apply step 1g, to group entries
+ *
+ * Need to deal with corner case where group may have
+ * greater permissions than owner. If so then limit
+ * group permissions, based on what extra permissions
+ * group has.
+ */
+static void
+zfs_fixup_group_entries(zfs_acl_t *aclp, void *acep, void *prevacep,
+ mode_t mode)
+{
+ uint32_t prevmask = aclp->z_ops.ace_mask_get(prevacep);
+ uint32_t mask = aclp->z_ops.ace_mask_get(acep);
+ uint16_t prevflags = aclp->z_ops.ace_flags_get(prevacep);
+ mode_t extramode = (mode >> 3) & 07;
+ mode_t ownermode = (mode >> 6);
+
+ if (prevflags & ACE_IDENTIFIER_GROUP) {
+
+ extramode &= ~ownermode;
+
+ if (extramode) {
+ if (extramode & S_IROTH) {
+ prevmask &= ~ACE_READ_DATA;
+ mask &= ~ACE_READ_DATA;
+ }
+ if (extramode & S_IWOTH) {
+ prevmask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
+ mask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
+ }
+ if (extramode & S_IXOTH) {
+ prevmask &= ~ACE_EXECUTE;
+ mask &= ~ACE_EXECUTE;
+ }
+ }
+ }
+ aclp->z_ops.ace_mask_set(acep, mask);
+ aclp->z_ops.ace_mask_set(prevacep, prevmask);
+}
+
+/*
+ * Apply the chmod algorithm as described
+ * in PSARC/2002/240
+ */
+static void
+zfs_acl_chmod(znode_t *zp, uint64_t mode, zfs_acl_t *aclp)
+{
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ void *acep = NULL, *prevacep = NULL;
+ uint64_t who;
+ int i;
+ int entry_type;
+ int reuse_deny;
+ int need_canonical_six = 1;
+ uint16_t iflags, type;
+ uint32_t access_mask;
+
+ ASSERT(MUTEX_HELD(&zp->z_acl_lock));
+ ASSERT(MUTEX_HELD(&zp->z_lock));
+
+ aclp->z_hints = (zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS);
+
+ /*
+ * If discard then just discard all ACL nodes which
+ * represent the ACEs.
+ *
+ * New owner@/group@/everone@ ACEs will be added
+ * later.
+ */
+ if (zfsvfs->z_acl_mode == ZFS_ACL_DISCARD)
+ zfs_acl_release_nodes(aclp);
+
+ while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
+ &iflags, &type)) {
+
+ entry_type = (iflags & ACE_TYPE_FLAGS);
+ iflags = (iflags & ALL_INHERIT);
+
+ if ((type != ALLOW && type != DENY) ||
+ (iflags & ACE_INHERIT_ONLY_ACE)) {
+ if (iflags)
+ aclp->z_hints |= ZFS_INHERIT_ACE;
+ switch (type) {
+ case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+ case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+ aclp->z_hints |= ZFS_ACL_OBJ_ACE;
+ break;
+ }
+ goto nextace;
+ }
+
+ /*
+ * Need to split ace into two?
+ */
+ if ((iflags & (ACE_FILE_INHERIT_ACE|
+ ACE_DIRECTORY_INHERIT_ACE)) &&
+ (!(iflags & ACE_INHERIT_ONLY_ACE))) {
+ zfs_acl_split_ace(aclp, acep);
+ aclp->z_hints |= ZFS_INHERIT_ACE;
+ goto nextace;
+ }
+
+ if (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
+ (entry_type == OWNING_GROUP)) {
+ access_mask &= ~OGE_CLEAR;
+ aclp->z_ops.ace_mask_set(acep, access_mask);
+ goto nextace;
+ } else {
+ reuse_deny = B_TRUE;
+ if (type == ALLOW) {
+
+ /*
+ * Check preceding ACE if any, to see
+ * if we need to prepend a DENY ACE.
+ * This is only applicable when the acl_mode
+ * property == groupmask.
+ */
+ if (zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK) {
+
+ reuse_deny = zfs_reuse_deny(aclp, acep,
+ prevacep);
+
+ if (!reuse_deny) {
+ prevacep =
+ zfs_acl_prepend_deny(zp,
+ aclp, acep, mode);
+ } else {
+ zfs_acl_prepend_fixup(
+ aclp, prevacep,
+ acep, mode,
+ zp->z_phys->zp_uid);
+ }
+ zfs_fixup_group_entries(aclp, acep,
+ prevacep, mode);
+
+ }
+ }
+ }
+nextace:
+ prevacep = acep;
+ }
+
+ /*
+ * Check out last six aces, if we have six.
+ */
+
+ if (aclp->z_acl_count >= 6) {
+ if (zfs_have_canonical_six(aclp)) {
+ need_canonical_six = 0;
+ }
+ }
+
+ if (need_canonical_six) {
+ size_t abstract_size = aclp->z_ops.ace_abstract_size();
+ void *zacep;
+ zfs_acl_node_t *aclnode =
+ zfs_acl_node_alloc(abstract_size * 6);
+
+ aclnode->z_size = abstract_size * 6;
+ aclnode->z_ace_count = 6;
+ aclp->z_acl_bytes += aclnode->z_size;
+ list_insert_tail(&aclp->z_acl, aclnode);
+
+ zacep = aclnode->z_acldata;
+
+ i = 0;
+ zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
+ 0, DENY, -1, ACE_OWNER);
+ zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
+ OWNER_ALLOW_MASK, ALLOW, -1, ACE_OWNER);
+ zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
+ DENY, -1, OWNING_GROUP);
+ zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
+ ALLOW, -1, OWNING_GROUP);
+ zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
+ EVERYONE_DENY_MASK, DENY, -1, ACE_EVERYONE);
+ zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
+ EVERYONE_ALLOW_MASK, ALLOW, -1, ACE_EVERYONE);
+ aclp->z_acl_count += 6;
+ }
+
+ zfs_acl_fixup_canonical_six(aclp, mode);
+}
+
+int
+zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
+{
+ int error;
+
+ mutex_enter(&zp->z_lock);
+ mutex_enter(&zp->z_acl_lock);
+ *aclp = NULL;
+ error = zfs_acl_node_read(zp, aclp, B_TRUE);
+ if (error == 0)
+ zfs_acl_chmod(zp, mode, *aclp);
+ mutex_exit(&zp->z_acl_lock);
+ mutex_exit(&zp->z_lock);
+ return (error);
+}
+
+/*
+ * strip off write_owner and write_acl
+ */
+static void
+zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep)
+{
+ uint32_t mask = aclp->z_ops.ace_mask_get(acep);
+
+ if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
+ (aclp->z_ops.ace_type_get(acep) == ALLOW)) {
+ mask &= ~RESTRICTED_CLEAR;
+ aclp->z_ops.ace_mask_set(acep, mask);
+ }
+}
+
+/*
+ * Should ACE be inherited?
+ */
+static int
+zfs_ace_can_use(znode_t *zp, uint16_t acep_flags)
+{
+ int vtype = ZTOV(zp)->v_type;
+ int iflags = (acep_flags & 0xf);
+
+ if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
+ return (1);
+ else if (iflags & ACE_FILE_INHERIT_ACE)
+ return (!((vtype == VDIR) &&
+ (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
+ return (0);
+}
+
+/*
+ * inherit inheritable ACEs from parent
+ */
+static zfs_acl_t *
+zfs_acl_inherit(znode_t *zp, zfs_acl_t *paclp, uint64_t mode,
+ boolean_t *need_chmod)
+{
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ void *pacep;
+ void *acep, *acep2;
+ zfs_acl_node_t *aclnode, *aclnode2;
+ zfs_acl_t *aclp = NULL;
+ uint64_t who;
+ uint32_t access_mask;
+ uint16_t iflags, newflags, type;
+ size_t ace_size;
+ void *data1, *data2;
+ size_t data1sz, data2sz;
+ boolean_t vdir = ZTOV(zp)->v_type == VDIR;
+ boolean_t vreg = ZTOV(zp)->v_type == VREG;
+ boolean_t passthrough, passthrough_x, noallow;
+
+ passthrough_x =
+ zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
+ passthrough = passthrough_x ||
+ zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
+ noallow =
+ zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW;
+
+ *need_chmod = B_TRUE;
+ pacep = NULL;
+ aclp = zfs_acl_alloc(paclp->z_version);
+ if (zfsvfs->z_acl_inherit == ZFS_ACL_DISCARD)
+ return (aclp);
+ while (pacep = zfs_acl_next_ace(paclp, pacep, &who,
+ &access_mask, &iflags, &type)) {
+
+ /*
+ * don't inherit bogus ACEs
+ */
+ if (!zfs_acl_valid_ace_type(type, iflags))
+ continue;
+
+ if (noallow && type == ALLOW)
+ continue;
+
+ ace_size = aclp->z_ops.ace_size(pacep);
+
+ if (!zfs_ace_can_use(zp, iflags))
+ continue;
+
+ /*
+ * If owner@, group@, or everyone@ inheritable
+ * then zfs_acl_chmod() isn't needed.
+ */
+ if (passthrough &&
+ ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
+ ((iflags & OWNING_GROUP) ==
+ OWNING_GROUP)) && (vreg || (vdir && (iflags &
+ ACE_DIRECTORY_INHERIT_ACE)))) {
+ *need_chmod = B_FALSE;
+
+ if (!vdir && passthrough_x &&
+ ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
+ access_mask &= ~ACE_EXECUTE;
+ }
+ }
+
+ aclnode = zfs_acl_node_alloc(ace_size);
+ list_insert_tail(&aclp->z_acl, aclnode);
+ acep = aclnode->z_acldata;
+
+ zfs_set_ace(aclp, acep, access_mask, type,
+ who, iflags|ACE_INHERITED_ACE);
+
+ /*
+ * Copy special opaque data if any
+ */
+ if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) {
+ VERIFY((data2sz = aclp->z_ops.ace_data(acep,
+ &data2)) == data1sz);
+ bcopy(data1, data2, data2sz);
+ }
+ aclp->z_acl_count++;
+ aclnode->z_ace_count++;
+ aclp->z_acl_bytes += aclnode->z_size;
+ newflags = aclp->z_ops.ace_flags_get(acep);
+
+ if (vdir)
+ aclp->z_hints |= ZFS_INHERIT_ACE;
+
+ if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
+ newflags &= ~ALL_INHERIT;
+ aclp->z_ops.ace_flags_set(acep,
+ newflags|ACE_INHERITED_ACE);
+ zfs_restricted_update(zfsvfs, aclp, acep);
+ continue;
+ }
+
+ ASSERT(vdir);
+
+ newflags = aclp->z_ops.ace_flags_get(acep);
+ if ((iflags & (ACE_FILE_INHERIT_ACE |
+ ACE_DIRECTORY_INHERIT_ACE)) !=
+ ACE_FILE_INHERIT_ACE) {
+ aclnode2 = zfs_acl_node_alloc(ace_size);
+ list_insert_tail(&aclp->z_acl, aclnode2);
+ acep2 = aclnode2->z_acldata;
+ zfs_set_ace(aclp, acep2,
+ access_mask, type, who,
+ iflags|ACE_INHERITED_ACE);
+ newflags |= ACE_INHERIT_ONLY_ACE;
+ aclp->z_ops.ace_flags_set(acep, newflags);
+ newflags &= ~ALL_INHERIT;
+ aclp->z_ops.ace_flags_set(acep2,
+ newflags|ACE_INHERITED_ACE);
+
+ /*
+ * Copy special opaque data if any
+ */
+ if ((data1sz = aclp->z_ops.ace_data(acep,
+ &data1)) != 0) {
+ VERIFY((data2sz =
+ aclp->z_ops.ace_data(acep2,
+ &data2)) == data1sz);
+ bcopy(data1, data2, data1sz);
+ }
+ aclp->z_acl_count++;
+ aclnode2->z_ace_count++;
+ aclp->z_acl_bytes += aclnode->z_size;
+ zfs_restricted_update(zfsvfs, aclp, acep2);
+ } else {
+ newflags |= ACE_INHERIT_ONLY_ACE;
+ aclp->z_ops.ace_flags_set(acep,
+ newflags|ACE_INHERITED_ACE);
+ }
+ }
+ return (aclp);
+}
+
+/*
+ * Create file system object initial permissions
+ * including inheritable ACEs.
+ */
+void
+zfs_perm_init(znode_t *zp, znode_t *parent, int flag,
+ vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
+ zfs_acl_t *setaclp, zfs_fuid_info_t **fuidp)
+{
+ uint64_t mode, fuid, fgid;
+ int error;
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ zfs_acl_t *aclp = NULL;
+ zfs_acl_t *paclp;
+ xvattr_t *xvap = (xvattr_t *)vap;
+ gid_t gid;
+ boolean_t need_chmod = B_TRUE;
+
+ if (setaclp)
+ aclp = setaclp;
+
+ mode = MAKEIMODE(vap->va_type, vap->va_mode);
+
+ /*
+ * Determine uid and gid.
+ */
+ if ((flag & (IS_ROOT_NODE | IS_REPLAY)) ||
+ ((flag & IS_XATTR) && (vap->va_type == VDIR))) {
+ fuid = zfs_fuid_create(zfsvfs, vap->va_uid, cr,
+ ZFS_OWNER, tx, fuidp);
+ fgid = zfs_fuid_create(zfsvfs, vap->va_gid, cr,
+ ZFS_GROUP, tx, fuidp);
+ gid = vap->va_gid;
+ } else {
+ fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER, tx, cr, fuidp);
+ fgid = 0;
+ if (vap->va_mask & AT_GID) {
+ fgid = zfs_fuid_create(zfsvfs, vap->va_gid, cr,
+ ZFS_GROUP, tx, fuidp);
+ gid = vap->va_gid;
+ if (fgid != parent->z_phys->zp_gid &&
+ !groupmember(vap->va_gid, cr) &&
+ secpolicy_vnode_create_gid(cr) != 0)
+ fgid = 0;
+ }
+ if (fgid == 0) {
+ if (parent->z_phys->zp_mode & S_ISGID) {
+ fgid = parent->z_phys->zp_gid;
+ gid = zfs_fuid_map_id(zfsvfs, fgid,
+ cr, ZFS_GROUP);
+ } else {
+ fgid = zfs_fuid_create_cred(zfsvfs,
+ ZFS_GROUP, tx, cr, fuidp);
+ gid = crgetgid(cr);
+ }
+ }
+ }
+
+ /*
+ * If we're creating a directory, and the parent directory has the
+ * set-GID bit set, set in on the new directory.
+ * Otherwise, if the user is neither privileged nor a member of the
+ * file's new group, clear the file's set-GID bit.
+ */
+
+ if ((parent->z_phys->zp_mode & S_ISGID) && (vap->va_type == VDIR)) {
+ mode |= S_ISGID;
+ } else {
+ if ((mode & S_ISGID) &&
+ secpolicy_vnode_setids_setgids(cr, gid) != 0)
+ mode &= ~S_ISGID;
+ }
+
+ zp->z_phys->zp_uid = fuid;
+ zp->z_phys->zp_gid = fgid;
+ zp->z_phys->zp_mode = mode;
+
+ if (aclp == NULL) {
+ mutex_enter(&parent->z_lock);
+ if ((ZTOV(parent)->v_type == VDIR &&
+ (parent->z_phys->zp_flags & ZFS_INHERIT_ACE)) &&
+ !(zp->z_phys->zp_flags & ZFS_XATTR)) {
+ mutex_enter(&parent->z_acl_lock);
+ VERIFY(0 == zfs_acl_node_read(parent, &paclp, B_FALSE));
+ mutex_exit(&parent->z_acl_lock);
+ aclp = zfs_acl_inherit(zp, paclp, mode, &need_chmod);
+ zfs_acl_free(paclp);
+ } else {
+ aclp = zfs_acl_alloc(zfs_acl_version_zp(zp));
+ }
+ mutex_exit(&parent->z_lock);
+ mutex_enter(&zp->z_lock);
+ mutex_enter(&zp->z_acl_lock);
+ if (need_chmod)
+ zfs_acl_chmod(zp, mode, aclp);
+ } else {
+ mutex_enter(&zp->z_lock);
+ mutex_enter(&zp->z_acl_lock);
+ }
+
+ /* Force auto_inherit on all new directory objects */
+ if (vap->va_type == VDIR)
+ aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
+
+ error = zfs_aclset_common(zp, aclp, cr, fuidp, tx);
+
+ /* Set optional attributes if any */
+ if (vap->va_mask & AT_XVATTR)
+ zfs_xvattr_set(zp, xvap);
+
+ mutex_exit(&zp->z_lock);
+ mutex_exit(&zp->z_acl_lock);
+ ASSERT3U(error, ==, 0);
+
+ if (aclp != setaclp)
+ zfs_acl_free(aclp);
+}
+
+/*
+ * Retrieve a files ACL
+ */
+int
+zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
+{
+ zfs_acl_t *aclp;
+ ulong_t mask;
+ int error;
+ int count = 0;
+ int largeace = 0;
+
+ mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
+ VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
+
+ if (error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr))
+ return (error);
+
+ if (mask == 0)
+ return (ENOSYS);
+
+ mutex_enter(&zp->z_acl_lock);
+
+ error = zfs_acl_node_read(zp, &aclp, B_FALSE);
+ if (error != 0) {
+ mutex_exit(&zp->z_acl_lock);
+ return (error);
+ }
+
+ /*
+ * Scan ACL to determine number of ACEs
+ */
+ if ((zp->z_phys->zp_flags & ZFS_ACL_OBJ_ACE) &&
+ !(mask & VSA_ACE_ALLTYPES)) {
+ void *zacep = NULL;
+ uint64_t who;
+ uint32_t access_mask;
+ uint16_t type, iflags;
+
+ while (zacep = zfs_acl_next_ace(aclp, zacep,
+ &who, &access_mask, &iflags, &type)) {
+ switch (type) {
+ case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+ case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+ case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+ largeace++;
+ continue;
+ default:
+ count++;
+ }
+ }
+ vsecp->vsa_aclcnt = count;
+ } else
+ count = aclp->z_acl_count;
+
+ if (mask & VSA_ACECNT) {
+ vsecp->vsa_aclcnt = count;
+ }
+
+ if (mask & VSA_ACE) {
+ size_t aclsz;
+
+ zfs_acl_node_t *aclnode = list_head(&aclp->z_acl);
+
+ aclsz = count * sizeof (ace_t) +
+ sizeof (ace_object_t) * largeace;
+
+ vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
+ vsecp->vsa_aclentsz = aclsz;
+
+ if (aclp->z_version == ZFS_ACL_VERSION_FUID)
+ zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr,
+ vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
+ else {
+ bcopy(aclnode->z_acldata, vsecp->vsa_aclentp,
+ count * sizeof (ace_t));
+ }
+ }
+ if (mask & VSA_ACE_ACLFLAGS) {
+ vsecp->vsa_aclflags = 0;
+ if (zp->z_phys->zp_flags & ZFS_ACL_DEFAULTED)
+ vsecp->vsa_aclflags |= ACL_DEFAULTED;
+ if (zp->z_phys->zp_flags & ZFS_ACL_PROTECTED)
+ vsecp->vsa_aclflags |= ACL_PROTECTED;
+ if (zp->z_phys->zp_flags & ZFS_ACL_AUTO_INHERIT)
+ vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
+ }
+
+ mutex_exit(&zp->z_acl_lock);
+
+ zfs_acl_free(aclp);
+
+ return (0);
+}
+
+int
+zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
+ vsecattr_t *vsecp, zfs_acl_t **zaclp)
+{
+ zfs_acl_t *aclp;
+ zfs_acl_node_t *aclnode;
+ int aclcnt = vsecp->vsa_aclcnt;
+ int error;
+
+ if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
+ return (EINVAL);
+
+ aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version));
+
+ aclp->z_hints = 0;
+ aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
+ if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
+ if ((error = zfs_copy_ace_2_oldace(obj_type, aclp,
+ (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
+ aclcnt, &aclnode->z_size)) != 0) {
+ zfs_acl_free(aclp);
+ zfs_acl_node_free(aclnode);
+ return (error);
+ }
+ } else {
+ if ((error = zfs_copy_ace_2_fuid(obj_type, aclp,
+ vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
+ &aclnode->z_size)) != 0) {
+ zfs_acl_free(aclp);
+ zfs_acl_node_free(aclnode);
+ return (error);
+ }
+ }
+ aclp->z_acl_bytes = aclnode->z_size;
+ aclnode->z_ace_count = aclcnt;
+ aclp->z_acl_count = aclcnt;
+ list_insert_head(&aclp->z_acl, aclnode);
+
+ /*
+ * If flags are being set then add them to z_hints
+ */
+ if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
+ if (vsecp->vsa_aclflags & ACL_PROTECTED)
+ aclp->z_hints |= ZFS_ACL_PROTECTED;
+ if (vsecp->vsa_aclflags & ACL_DEFAULTED)
+ aclp->z_hints |= ZFS_ACL_DEFAULTED;
+ if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
+ aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
+ }
+
+ *zaclp = aclp;
+
+ return (0);
+}
+
+/*
+ * Set a files ACL
+ */
+int
+zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
+{
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ zilog_t *zilog = zfsvfs->z_log;
+ ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
+ dmu_tx_t *tx;
+ int error;
+ zfs_acl_t *aclp;
+ zfs_fuid_info_t *fuidp = NULL;
+
+ if (mask == 0)
+ return (ENOSYS);
+
+ if (zp->z_phys->zp_flags & ZFS_IMMUTABLE)
+ return (EPERM);
+
+ if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))
+ return (error);
+
+ error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, &aclp);
+ if (error)
+ return (error);
+
+ /*
+ * If ACL wide flags aren't being set then preserve any
+ * existing flags.
+ */
+ if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
+ aclp->z_hints |= (zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS);
+ }
+top:
+ if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr)) {
+ zfs_acl_free(aclp);
+ return (error);
+ }
+
+ mutex_enter(&zp->z_lock);
+ mutex_enter(&zp->z_acl_lock);
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_bonus(tx, zp->z_id);
+
+ if (zp->z_phys->zp_acl.z_acl_extern_obj) {
+ /* Are we upgrading ACL? */
+ if (zfsvfs->z_version <= ZPL_VERSION_FUID &&
+ zp->z_phys->zp_acl.z_acl_version ==
+ ZFS_ACL_VERSION_INITIAL) {
+ dmu_tx_hold_free(tx,
+ zp->z_phys->zp_acl.z_acl_extern_obj,
+ 0, DMU_OBJECT_END);
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+ 0, aclp->z_acl_bytes);
+ } else {
+ dmu_tx_hold_write(tx,
+ zp->z_phys->zp_acl.z_acl_extern_obj,
+ 0, aclp->z_acl_bytes);
+ }
+ } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
+ }
+ if (aclp->z_has_fuids) {
+ if (zfsvfs->z_fuid_obj == 0) {
+ dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
+ FUID_SIZE_ESTIMATE(zfsvfs));
+ dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL);
+ } else {
+ dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj);
+ dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0,
+ FUID_SIZE_ESTIMATE(zfsvfs));
+ }
+ }
+
+ error = dmu_tx_assign(tx, zfsvfs->z_assign);
+ if (error) {
+ mutex_exit(&zp->z_acl_lock);
+ mutex_exit(&zp->z_lock);
+
+ if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) {
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ goto top;
+ }
+ dmu_tx_abort(tx);
+ zfs_acl_free(aclp);
+ return (error);
+ }
+
+ error = zfs_aclset_common(zp, aclp, cr, &fuidp, tx);
+ ASSERT(error == 0);
+
+ zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
+
+ if (fuidp)
+ zfs_fuid_info_free(fuidp);
+ zfs_acl_free(aclp);
+ dmu_tx_commit(tx);
+done:
+ mutex_exit(&zp->z_acl_lock);
+ mutex_exit(&zp->z_lock);
+
+ return (error);
+}
+
+/*
+ * working_mode returns the permissions that were not granted
+ */
+static int
+zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
+ boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
+{
+ zfs_acl_t *aclp;
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ int error;
+ uid_t uid = crgetuid(cr);
+ uint64_t who;
+ uint16_t type, iflags;
+ uint16_t entry_type;
+ uint32_t access_mask;
+ uint32_t deny_mask = 0;
+ zfs_ace_hdr_t *acep = NULL;
+ boolean_t checkit;
+ uid_t fowner;
+ uid_t gowner;
+
+ /*
+ * Short circuit empty requests
+ */
+ if (v4_mode == 0)
+ return (0);
+
+ *check_privs = B_TRUE;
+
+ if (zfsvfs->z_assign >= TXG_INITIAL) { /* ZIL replay */
+ *working_mode = 0;
+ return (0);
+ }
+
+ *working_mode = v4_mode;
+
+ if ((v4_mode & WRITE_MASK) &&
+ (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
+ (!IS_DEVVP(ZTOV(zp)))) {
+ *check_privs = B_FALSE;
+ return (EROFS);
+ }
+
+ /*
+ * Only check for READONLY on non-directories.
+ */
+ if ((v4_mode & WRITE_MASK_DATA) &&
+ (((ZTOV(zp)->v_type != VDIR) &&
+ (zp->z_phys->zp_flags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
+ (ZTOV(zp)->v_type == VDIR &&
+ (zp->z_phys->zp_flags & ZFS_IMMUTABLE)))) {
+ *check_privs = B_FALSE;
+ return (EPERM);
+ }
+
+ if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
+ (zp->z_phys->zp_flags & ZFS_NOUNLINK)) {
+ *check_privs = B_FALSE;
+ return (EPERM);
+ }
+
+ if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
+ (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED))) {
+ *check_privs = B_FALSE;
+ return (EACCES);
+ }
+
+ /*
+ * The caller requested that the ACL check be skipped. This
+ * would only happen if the caller checked VOP_ACCESS() with a
+ * 32 bit ACE mask and already had the appropriate permissions.
+ */
+ if (skipaclchk) {
+ *working_mode = 0;
+ return (0);
+ }
+
+ zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
+
+ mutex_enter(&zp->z_acl_lock);
+
+ error = zfs_acl_node_read(zp, &aclp, B_FALSE);
+ if (error != 0) {
+ mutex_exit(&zp->z_acl_lock);
+ return (error);
+ }
+
+ while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
+ &iflags, &type)) {
+
+ if (!zfs_acl_valid_ace_type(type, iflags))
+ continue;
+
+ if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE))
+ continue;
+
+ entry_type = (iflags & ACE_TYPE_FLAGS);
+
+ checkit = B_FALSE;
+
+ switch (entry_type) {
+ case ACE_OWNER:
+ if (uid == fowner)
+ checkit = B_TRUE;
+ break;
+ case OWNING_GROUP:
+ who = gowner;
+ /*FALLTHROUGH*/
+ case ACE_IDENTIFIER_GROUP:
+ checkit = zfs_groupmember(zfsvfs, who, cr);
+ break;
+ case ACE_EVERYONE:
+ checkit = B_TRUE;
+ break;
+
+ /* USER Entry */
+ default:
+ if (entry_type == 0) {
+ uid_t newid;
+
+ newid = zfs_fuid_map_id(zfsvfs, who, cr,
+ ZFS_ACE_USER);
+ if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
+ uid == newid)
+ checkit = B_TRUE;
+ break;
+ } else {
+ zfs_acl_free(aclp);
+ mutex_exit(&zp->z_acl_lock);
+ return (EIO);
+ }
+ }
+
+ if (checkit) {
+ uint32_t mask_matched = (access_mask & *working_mode);
+
+ if (mask_matched) {
+ if (type == DENY)
+ deny_mask |= mask_matched;
+
+ *working_mode &= ~mask_matched;
+ }
+ }
+
+ /* Are we done? */
+ if (*working_mode == 0)
+ break;
+ }
+
+ mutex_exit(&zp->z_acl_lock);
+ zfs_acl_free(aclp);
+
+ /* Put the found 'denies' back on the working mode */
+ if (deny_mask) {
+ *working_mode |= deny_mask;
+ return (EACCES);
+ } else if (*working_mode) {
+ return (-1);
+ }
+
+ return (0);
+}
+
+static int
+zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
+ cred_t *cr)
+{
+ if (*working_mode != ACE_WRITE_DATA)
+ return (EACCES);
+
+ return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
+ check_privs, B_FALSE, cr));
+}
+
+/*
+ * Determine whether Access should be granted/denied, invoking least
+ * priv subsytem when a deny is determined.
+ */
+int
+zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
+{
+ uint32_t working_mode;
+ int error;
+ int is_attr;
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ boolean_t check_privs;
+ znode_t *xzp;
+ znode_t *check_zp = zp;
+
+ is_attr = ((zp->z_phys->zp_flags & ZFS_XATTR) &&
+ (ZTOV(zp)->v_type == VDIR));
+
+ /*
+ * If attribute then validate against base file
+ */
+ if (is_attr) {
+ if ((error = zfs_zget(zp->z_zfsvfs,
+ zp->z_phys->zp_parent, &xzp)) != 0) {
+ return (error);
+ }
+
+ check_zp = xzp;
+
+ /*
+ * fixup mode to map to xattr perms
+ */
+
+ if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
+ mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
+ mode |= ACE_WRITE_NAMED_ATTRS;
+ }
+
+ if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
+ mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
+ mode |= ACE_READ_NAMED_ATTRS;
+ }
+ }
+
+ if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
+ &check_privs, skipaclchk, cr)) == 0) {
+ if (is_attr)
+ VN_RELE(ZTOV(xzp));
+ return (0);
+ }
+
+ if (error && !check_privs) {
+ if (is_attr)
+ VN_RELE(ZTOV(xzp));
+ return (error);
+ }
+
+ if (error && (flags & V_APPEND)) {
+ error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
+ }
+
+ if (error && check_privs) {
+ uid_t owner;
+ mode_t checkmode = 0;
+
+ owner = zfs_fuid_map_id(zfsvfs, check_zp->z_phys->zp_uid, cr,
+ ZFS_OWNER);
+
+ /*
+ * First check for implicit owner permission on
+ * read_acl/read_attributes
+ */
+
+ error = 0;
+ ASSERT(working_mode != 0);
+
+ if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
+ owner == crgetuid(cr)))
+ working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
+
+ if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
+ ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
+ checkmode |= VREAD;
+ if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
+ ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
+ checkmode |= VWRITE;
+ if (working_mode & ACE_EXECUTE)
+ checkmode |= VEXEC;
+
+ if (checkmode)
+ error = secpolicy_vnode_access(cr, ZTOV(check_zp),
+ owner, checkmode);
+
+ if (error == 0 && (working_mode & ACE_WRITE_OWNER))
+ error = secpolicy_vnode_chown(cr, B_TRUE);
+ if (error == 0 && (working_mode & ACE_WRITE_ACL))
+ error = secpolicy_vnode_setdac(cr, owner);
+
+ if (error == 0 && (working_mode &
+ (ACE_DELETE|ACE_DELETE_CHILD)))
+ error = secpolicy_vnode_remove(cr);
+
+ if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
+ error = secpolicy_vnode_chown(cr, B_FALSE);
+ }
+ if (error == 0) {
+ /*
+ * See if any bits other than those already checked
+ * for are still present. If so then return EACCES
+ */
+ if (working_mode & ~(ZFS_CHECKED_MASKS)) {
+ error = EACCES;
+ }
+ }
+ }
+
+ if (is_attr)
+ VN_RELE(ZTOV(xzp));
+
+ return (error);
+}
+
+/*
+ * Translate traditional unix VREAD/VWRITE/VEXEC mode into
+ * native ACL format and call zfs_zaccess()
+ */
+int
+zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
+{
+ return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
+}
+
+/*
+ * Access function for secpolicy_vnode_setattr
+ */
+int
+zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
+{
+ int v4_mode = zfs_unix_to_v4(mode >> 6);
+
+ return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
+}
+
+static int
+zfs_delete_final_check(znode_t *zp, znode_t *dzp,
+ mode_t missing_perms, cred_t *cr)
+{
+ int error;
+ uid_t downer;
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+ downer = zfs_fuid_map_id(zfsvfs, dzp->z_phys->zp_uid, cr, ZFS_OWNER);
+
+ error = secpolicy_vnode_access(cr, ZTOV(dzp), downer, missing_perms);
+
+ if (error == 0)
+ error = zfs_sticky_remove_access(dzp, zp, cr);
+
+ return (error);
+}
+
+/*
+ * Determine whether Access should be granted/deny, without
+ * consulting least priv subsystem.
+ *
+ *
+ * The following chart is the recommended NFSv4 enforcement for
+ * ability to delete an object.
+ *
+ * -------------------------------------------------------
+ * | Parent Dir | Target Object Permissions |
+ * | permissions | |
+ * -------------------------------------------------------
+ * | | ACL Allows | ACL Denies| Delete |
+ * | | Delete | Delete | unspecified|
+ * -------------------------------------------------------
+ * | ACL Allows | Permit | Permit | Permit |
+ * | DELETE_CHILD | |
+ * -------------------------------------------------------
+ * | ACL Denies | Permit | Deny | Deny |
+ * | DELETE_CHILD | | | |
+ * -------------------------------------------------------
+ * | ACL specifies | | | |
+ * | only allow | Permit | Permit | Permit |
+ * | write and | | | |
+ * | execute | | | |
+ * -------------------------------------------------------
+ * | ACL denies | | | |
+ * | write and | Permit | Deny | Deny |
+ * | execute | | | |
+ * -------------------------------------------------------
+ * ^
+ * |
+ * No search privilege, can't even look up file?
+ *
+ */
+int
+zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
+{
+ uint32_t dzp_working_mode = 0;
+ uint32_t zp_working_mode = 0;
+ int dzp_error, zp_error;
+ mode_t missing_perms;
+ boolean_t dzpcheck_privs = B_TRUE;
+ boolean_t zpcheck_privs = B_TRUE;
+
+ /*
+ * We want specific DELETE permissions to
+ * take precedence over WRITE/EXECUTE. We don't
+ * want an ACL such as this to mess us up.
+ * user:joe:write_data:deny,user:joe:delete:allow
+ *
+ * However, deny permissions may ultimately be overridden
+ * by secpolicy_vnode_access().
+ *
+ * We will ask for all of the necessary permissions and then
+ * look at the working modes from the directory and target object
+ * to determine what was found.
+ */
+
+ if (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
+ return (EPERM);
+
+ /*
+ * First row
+ * If the directory permissions allow the delete, we are done.
+ */
+ if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
+ &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
+ return (0);
+
+ /*
+ * If target object has delete permission then we are done
+ */
+ if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
+ &zpcheck_privs, B_FALSE, cr)) == 0)
+ return (0);
+
+ ASSERT(dzp_error && zp_error);
+
+ if (!dzpcheck_privs)
+ return (dzp_error);
+ if (!zpcheck_privs)
+ return (zp_error);
+
+ /*
+ * Second row
+ *
+ * If directory returns EACCES then delete_child was denied
+ * due to deny delete_child. In this case send the request through
+ * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
+ * since that *could* allow the delete based on write/execute permission
+ * and we want delete permissions to override write/execute.
+ */
+
+ if (dzp_error == EACCES)
+ return (secpolicy_vnode_remove(cr));
+
+ /*
+ * Third Row
+ * only need to see if we have write/execute on directory.
+ */
+
+ if ((dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
+ &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
+ return (zfs_sticky_remove_access(dzp, zp, cr));
+
+ if (!dzpcheck_privs)
+ return (dzp_error);
+
+ /*
+ * Fourth row
+ */
+
+ missing_perms = (dzp_working_mode & ACE_WRITE_DATA) ? VWRITE : 0;
+ missing_perms |= (dzp_working_mode & ACE_EXECUTE) ? VEXEC : 0;
+
+ ASSERT(missing_perms);
+
+ return (zfs_delete_final_check(zp, dzp, missing_perms, cr));
+
+}
+
+int
+zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
+ znode_t *tzp, cred_t *cr)
+{
+ int add_perm;
+ int error;
+
+ if (szp->z_phys->zp_flags & ZFS_AV_QUARANTINED)
+ return (EACCES);
+
+ add_perm = (ZTOV(szp)->v_type == VDIR) ?
+ ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
+
+ /*
+ * Rename permissions are combination of delete permission +
+ * add file/subdir permission.
+ */
+
+ /*
+ * first make sure we do the delete portion.
+ *
+ * If that succeeds then check for add_file/add_subdir permissions
+ */
+
+ if (error = zfs_zaccess_delete(sdzp, szp, cr))
+ return (error);
+
+ /*
+ * If we have a tzp, see if we can delete it?
+ */
+ if (tzp) {
+ if (error = zfs_zaccess_delete(tdzp, tzp, cr))
+ return (error);
+ }
+
+ /*
+ * Now check for add permissions
+ */
+ error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);
+
+ return (error);
+}
git://git.camperquake.de / zfs.git / blobdiff