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d96303cb07
Avoid assuming that a pointer can fit in a uint64_t and use uintptr_t instead. Reviewed-by: Matthew Ahrens <mahrens@delphix.com> Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Signed-off-by: Brooks Davis <brooks.davis@sri.com> Closes #14131
3037 lines
78 KiB
C
3037 lines
78 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2013 by Delphix. All rights reserved.
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* Copyright 2014 Nexenta Systems, Inc. All rights reserved.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/sysmacros.h>
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#include <sys/vfs.h>
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#include <sys/vnode.h>
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#include <sys/sid.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/kmem.h>
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#include <sys/cmn_err.h>
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#include <sys/errno.h>
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#include <sys/fs/zfs.h>
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#include <sys/policy.h>
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#include <sys/zfs_znode.h>
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#include <sys/zfs_fuid.h>
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#include <sys/zfs_acl.h>
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#include <sys/zfs_dir.h>
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#include <sys/zfs_quota.h>
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#include <sys/zfs_vfsops.h>
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#include <sys/dmu.h>
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#include <sys/dnode.h>
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#include <sys/zap.h>
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#include <sys/sa.h>
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#include <sys/trace_acl.h>
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#include <sys/zpl.h>
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#define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
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#define DENY ACE_ACCESS_DENIED_ACE_TYPE
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#define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
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#define MIN_ACE_TYPE ALLOW
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#define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP)
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#define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
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ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
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#define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
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ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
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#define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
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ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
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#define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
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ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
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ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
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ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
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#define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
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#define WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \
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ACE_DELETE|ACE_DELETE_CHILD)
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#define WRITE_MASK (WRITE_MASK_DATA|WRITE_MASK_ATTRS)
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#define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
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ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
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#define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
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ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
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#define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \
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ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE)
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#define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER)
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#define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\
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ZFS_ACL_PROTECTED)
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#define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\
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ZFS_ACL_OBJ_ACE)
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#define ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH)
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#define IDMAP_WK_CREATOR_OWNER_UID 2147483648U
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static uint16_t
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zfs_ace_v0_get_type(void *acep)
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{
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return (((zfs_oldace_t *)acep)->z_type);
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}
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static uint16_t
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zfs_ace_v0_get_flags(void *acep)
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{
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return (((zfs_oldace_t *)acep)->z_flags);
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}
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static uint32_t
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zfs_ace_v0_get_mask(void *acep)
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{
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return (((zfs_oldace_t *)acep)->z_access_mask);
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}
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static uint64_t
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zfs_ace_v0_get_who(void *acep)
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{
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return (((zfs_oldace_t *)acep)->z_fuid);
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}
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static void
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zfs_ace_v0_set_type(void *acep, uint16_t type)
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{
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((zfs_oldace_t *)acep)->z_type = type;
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}
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static void
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zfs_ace_v0_set_flags(void *acep, uint16_t flags)
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{
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((zfs_oldace_t *)acep)->z_flags = flags;
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}
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static void
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zfs_ace_v0_set_mask(void *acep, uint32_t mask)
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{
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((zfs_oldace_t *)acep)->z_access_mask = mask;
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}
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static void
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zfs_ace_v0_set_who(void *acep, uint64_t who)
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{
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((zfs_oldace_t *)acep)->z_fuid = who;
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}
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static size_t
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zfs_ace_v0_size(void *acep)
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{
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(void) acep;
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return (sizeof (zfs_oldace_t));
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}
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static size_t
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zfs_ace_v0_abstract_size(void)
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{
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return (sizeof (zfs_oldace_t));
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}
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static int
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zfs_ace_v0_mask_off(void)
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{
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return (offsetof(zfs_oldace_t, z_access_mask));
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}
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static int
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zfs_ace_v0_data(void *acep, void **datap)
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{
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(void) acep;
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*datap = NULL;
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return (0);
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}
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static const acl_ops_t zfs_acl_v0_ops = {
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.ace_mask_get = zfs_ace_v0_get_mask,
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.ace_mask_set = zfs_ace_v0_set_mask,
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.ace_flags_get = zfs_ace_v0_get_flags,
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.ace_flags_set = zfs_ace_v0_set_flags,
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.ace_type_get = zfs_ace_v0_get_type,
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.ace_type_set = zfs_ace_v0_set_type,
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.ace_who_get = zfs_ace_v0_get_who,
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.ace_who_set = zfs_ace_v0_set_who,
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.ace_size = zfs_ace_v0_size,
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.ace_abstract_size = zfs_ace_v0_abstract_size,
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.ace_mask_off = zfs_ace_v0_mask_off,
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.ace_data = zfs_ace_v0_data
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};
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static uint16_t
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zfs_ace_fuid_get_type(void *acep)
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{
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return (((zfs_ace_hdr_t *)acep)->z_type);
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}
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static uint16_t
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zfs_ace_fuid_get_flags(void *acep)
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{
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return (((zfs_ace_hdr_t *)acep)->z_flags);
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}
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static uint32_t
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zfs_ace_fuid_get_mask(void *acep)
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{
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return (((zfs_ace_hdr_t *)acep)->z_access_mask);
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}
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static uint64_t
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zfs_ace_fuid_get_who(void *args)
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{
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uint16_t entry_type;
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zfs_ace_t *acep = args;
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entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
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if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
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entry_type == ACE_EVERYONE)
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return (-1);
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return (((zfs_ace_t *)acep)->z_fuid);
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}
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static void
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zfs_ace_fuid_set_type(void *acep, uint16_t type)
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{
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((zfs_ace_hdr_t *)acep)->z_type = type;
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}
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static void
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zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
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{
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((zfs_ace_hdr_t *)acep)->z_flags = flags;
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}
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static void
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zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
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{
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((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
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}
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static void
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zfs_ace_fuid_set_who(void *arg, uint64_t who)
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{
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zfs_ace_t *acep = arg;
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uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
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if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
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entry_type == ACE_EVERYONE)
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return;
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acep->z_fuid = who;
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}
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static size_t
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zfs_ace_fuid_size(void *acep)
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{
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zfs_ace_hdr_t *zacep = acep;
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uint16_t entry_type;
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switch (zacep->z_type) {
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case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
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case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
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case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
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case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
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return (sizeof (zfs_object_ace_t));
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case ALLOW:
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case DENY:
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entry_type =
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(((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
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if (entry_type == ACE_OWNER ||
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entry_type == OWNING_GROUP ||
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entry_type == ACE_EVERYONE)
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return (sizeof (zfs_ace_hdr_t));
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zfs_fallthrough;
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default:
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return (sizeof (zfs_ace_t));
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}
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}
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static size_t
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zfs_ace_fuid_abstract_size(void)
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{
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return (sizeof (zfs_ace_hdr_t));
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}
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static int
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zfs_ace_fuid_mask_off(void)
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{
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return (offsetof(zfs_ace_hdr_t, z_access_mask));
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}
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static int
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zfs_ace_fuid_data(void *acep, void **datap)
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{
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zfs_ace_t *zacep = acep;
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zfs_object_ace_t *zobjp;
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switch (zacep->z_hdr.z_type) {
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case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
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case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
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case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
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case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
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zobjp = acep;
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*datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
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return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
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default:
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*datap = NULL;
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return (0);
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}
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}
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static const acl_ops_t zfs_acl_fuid_ops = {
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.ace_mask_get = zfs_ace_fuid_get_mask,
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.ace_mask_set = zfs_ace_fuid_set_mask,
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.ace_flags_get = zfs_ace_fuid_get_flags,
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.ace_flags_set = zfs_ace_fuid_set_flags,
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.ace_type_get = zfs_ace_fuid_get_type,
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.ace_type_set = zfs_ace_fuid_set_type,
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.ace_who_get = zfs_ace_fuid_get_who,
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.ace_who_set = zfs_ace_fuid_set_who,
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.ace_size = zfs_ace_fuid_size,
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.ace_abstract_size = zfs_ace_fuid_abstract_size,
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.ace_mask_off = zfs_ace_fuid_mask_off,
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.ace_data = zfs_ace_fuid_data
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};
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/*
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* The following three functions are provided for compatibility with
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* older ZPL version in order to determine if the file use to have
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* an external ACL and what version of ACL previously existed on the
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* file. Would really be nice to not need this, sigh.
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*/
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uint64_t
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zfs_external_acl(znode_t *zp)
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{
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zfs_acl_phys_t acl_phys;
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int error;
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if (zp->z_is_sa)
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return (0);
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/*
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* Need to deal with a potential
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* race where zfs_sa_upgrade could cause
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* z_isa_sa to change.
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*
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* If the lookup fails then the state of z_is_sa should have
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* changed.
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*/
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if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(ZTOZSB(zp)),
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&acl_phys, sizeof (acl_phys))) == 0)
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return (acl_phys.z_acl_extern_obj);
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else {
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/*
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* after upgrade the SA_ZPL_ZNODE_ACL should have been
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* removed
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*/
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VERIFY(zp->z_is_sa && error == ENOENT);
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return (0);
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}
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}
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/*
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* Determine size of ACL in bytes
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*
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* This is more complicated than it should be since we have to deal
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* with old external ACLs.
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*/
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static int
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zfs_acl_znode_info(znode_t *zp, int *aclsize, int *aclcount,
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zfs_acl_phys_t *aclphys)
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{
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zfsvfs_t *zfsvfs = ZTOZSB(zp);
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uint64_t acl_count;
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int size;
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int error;
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ASSERT(MUTEX_HELD(&zp->z_acl_lock));
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if (zp->z_is_sa) {
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if ((error = sa_size(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zfsvfs),
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&size)) != 0)
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return (error);
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*aclsize = size;
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if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_COUNT(zfsvfs),
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&acl_count, sizeof (acl_count))) != 0)
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return (error);
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*aclcount = acl_count;
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} else {
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if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs),
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aclphys, sizeof (*aclphys))) != 0)
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return (error);
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if (aclphys->z_acl_version == ZFS_ACL_VERSION_INITIAL) {
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*aclsize = ZFS_ACL_SIZE(aclphys->z_acl_size);
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*aclcount = aclphys->z_acl_size;
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} else {
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*aclsize = aclphys->z_acl_size;
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*aclcount = aclphys->z_acl_count;
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}
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}
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return (0);
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}
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int
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zfs_znode_acl_version(znode_t *zp)
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{
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zfs_acl_phys_t acl_phys;
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if (zp->z_is_sa)
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return (ZFS_ACL_VERSION_FUID);
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else {
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int error;
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/*
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* Need to deal with a potential
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* race where zfs_sa_upgrade could cause
|
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* z_isa_sa to change.
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*
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* If the lookup fails then the state of z_is_sa should have
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* changed.
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*/
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if ((error = sa_lookup(zp->z_sa_hdl,
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SA_ZPL_ZNODE_ACL(ZTOZSB(zp)),
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&acl_phys, sizeof (acl_phys))) == 0)
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return (acl_phys.z_acl_version);
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else {
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/*
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* After upgrade SA_ZPL_ZNODE_ACL should have
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* been removed.
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*/
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VERIFY(zp->z_is_sa && error == ENOENT);
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return (ZFS_ACL_VERSION_FUID);
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}
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}
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}
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static int
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zfs_acl_version(int version)
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{
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if (version < ZPL_VERSION_FUID)
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return (ZFS_ACL_VERSION_INITIAL);
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else
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return (ZFS_ACL_VERSION_FUID);
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}
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static int
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zfs_acl_version_zp(znode_t *zp)
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{
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return (zfs_acl_version(ZTOZSB(zp)->z_version));
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}
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zfs_acl_t *
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zfs_acl_alloc(int vers)
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{
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zfs_acl_t *aclp;
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aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP);
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list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
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offsetof(zfs_acl_node_t, z_next));
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aclp->z_version = vers;
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if (vers == ZFS_ACL_VERSION_FUID)
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aclp->z_ops = &zfs_acl_fuid_ops;
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else
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aclp->z_ops = &zfs_acl_v0_ops;
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return (aclp);
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}
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zfs_acl_node_t *
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|
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 <= MAX_ACE_TYPE)
|
|
return (B_TRUE);
|
|
}
|
|
return (B_FALSE);
|
|
}
|
|
|
|
static boolean_t
|
|
zfs_ace_valid(umode_t obj_mode, 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 (S_ISDIR(obj_mode) &&
|
|
(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;
|
|
|
|
ASSERT(aclp);
|
|
|
|
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);
|
|
}
|
|
|
|
static uintptr_t
|
|
zfs_ace_walk(void *datap, uintptr_t cookie, int aclcnt,
|
|
uint16_t *flags, uint16_t *type, uint32_t *mask)
|
|
{
|
|
(void) aclcnt;
|
|
zfs_acl_t *aclp = datap;
|
|
zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)cookie;
|
|
uint64_t who;
|
|
|
|
acep = zfs_acl_next_ace(aclp, acep, &who, mask,
|
|
flags, type);
|
|
return ((uintptr_t)acep);
|
|
}
|
|
|
|
/*
|
|
* Copy ACE to internal ZFS format.
|
|
* While processing the ACL each ACE will be validated for correctness.
|
|
* ACE FUIDs will be created later.
|
|
*/
|
|
static int
|
|
zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, umode_t obj_mode, zfs_acl_t *aclp,
|
|
void *datap, zfs_ace_t *z_acl, uint64_t aclcnt, size_t *size,
|
|
zfs_fuid_info_t **fuidp, cred_t *cr)
|
|
{
|
|
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) {
|
|
aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who,
|
|
cr, (entry_type == 0) ?
|
|
ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
|
|
}
|
|
|
|
/*
|
|
* Make sure ACE is valid
|
|
*/
|
|
if (zfs_ace_valid(obj_mode, aclp, aceptr->z_hdr.z_type,
|
|
aceptr->z_hdr.z_flags) != B_TRUE)
|
|
return (SET_ERROR(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;
|
|
|
|
memcpy(zobjacep->z_object_type, aceobjp->a_obj_type,
|
|
sizeof (aceobjp->a_obj_type));
|
|
memcpy(zobjacep->z_inherit_type,
|
|
aceobjp->a_inherit_obj_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;
|
|
memcpy(objacep->a_obj_type,
|
|
zobjacep->z_object_type,
|
|
sizeof (zobjacep->z_object_type));
|
|
memcpy(objacep->a_inherit_obj_type,
|
|
zobjacep->z_inherit_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(umode_t obj_mode, 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_mode, aclp, aceptr->z_type,
|
|
aceptr->z_flags) != B_TRUE)
|
|
return (SET_ERROR(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, cred_t *cr)
|
|
{
|
|
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
|
|
* every time.
|
|
*/
|
|
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(ZTOZSB(zp), ZTOI(zp)->i_mode,
|
|
aclp, oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
|
|
&newaclnode->z_size, NULL, cr) == 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 int
|
|
zfs_v4_to_unix(uint32_t access_mask, int *unmapped)
|
|
{
|
|
int new_mask = 0;
|
|
|
|
*unmapped = access_mask &
|
|
(ACE_WRITE_OWNER | ACE_WRITE_ACL | ACE_DELETE);
|
|
|
|
if (access_mask & WRITE_MASK)
|
|
new_mask |= S_IWOTH;
|
|
if (access_mask & ACE_READ_DATA)
|
|
new_mask |= S_IROTH;
|
|
if (access_mask & ACE_EXECUTE)
|
|
new_mask |= S_IXOTH;
|
|
|
|
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.
|
|
*/
|
|
uint64_t
|
|
zfs_mode_compute(uint64_t fmode, zfs_acl_t *aclp,
|
|
uint64_t *pflags, uint64_t fuid, uint64_t fgid)
|
|
{
|
|
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;
|
|
boolean_t an_exec_denied = B_FALSE;
|
|
|
|
mode = (fmode & (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 any inherit_only ACEs
|
|
*/
|
|
if (iflags & ACE_INHERIT_ONLY_ACE)
|
|
continue;
|
|
|
|
if (entry_type == ACE_OWNER || (entry_type == 0 &&
|
|
who == fuid)) {
|
|
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 ||
|
|
(entry_type == ACE_IDENTIFIER_GROUP && who == fgid)) {
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* Only care if this IDENTIFIER_GROUP or
|
|
* USER ACE denies execute access to someone,
|
|
* mode is not affected
|
|
*/
|
|
if ((access_mask & ACE_EXECUTE) && type == DENY)
|
|
an_exec_denied = B_TRUE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Failure to allow is effectively a deny, so execute permission
|
|
* is denied if it was never mentioned or if we explicitly
|
|
* weren't allowed it.
|
|
*/
|
|
if (!an_exec_denied &&
|
|
((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS ||
|
|
(mode & ALL_MODE_EXECS) != ALL_MODE_EXECS))
|
|
an_exec_denied = B_TRUE;
|
|
|
|
if (an_exec_denied)
|
|
*pflags &= ~ZFS_NO_EXECS_DENIED;
|
|
else
|
|
*pflags |= ZFS_NO_EXECS_DENIED;
|
|
|
|
return (mode);
|
|
}
|
|
|
|
/*
|
|
* Read an external acl object. If the intent is to modify, always
|
|
* create a new acl and leave any cached acl in place.
|
|
*/
|
|
int
|
|
zfs_acl_node_read(struct znode *zp, boolean_t have_lock, zfs_acl_t **aclpp,
|
|
boolean_t will_modify)
|
|
{
|
|
zfs_acl_t *aclp;
|
|
int aclsize = 0;
|
|
int acl_count = 0;
|
|
zfs_acl_node_t *aclnode;
|
|
zfs_acl_phys_t znode_acl;
|
|
int version;
|
|
int error;
|
|
boolean_t drop_lock = B_FALSE;
|
|
|
|
ASSERT(MUTEX_HELD(&zp->z_acl_lock));
|
|
|
|
if (zp->z_acl_cached && !will_modify) {
|
|
*aclpp = zp->z_acl_cached;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* close race where znode could be upgrade while trying to
|
|
* read the znode attributes.
|
|
*
|
|
* But this could only happen if the file isn't already an SA
|
|
* znode
|
|
*/
|
|
if (!zp->z_is_sa && !have_lock) {
|
|
mutex_enter(&zp->z_lock);
|
|
drop_lock = B_TRUE;
|
|
}
|
|
version = zfs_znode_acl_version(zp);
|
|
|
|
if ((error = zfs_acl_znode_info(zp, &aclsize,
|
|
&acl_count, &znode_acl)) != 0) {
|
|
goto done;
|
|
}
|
|
|
|
aclp = zfs_acl_alloc(version);
|
|
|
|
aclp->z_acl_count = acl_count;
|
|
aclp->z_acl_bytes = aclsize;
|
|
|
|
aclnode = zfs_acl_node_alloc(aclsize);
|
|
aclnode->z_ace_count = aclp->z_acl_count;
|
|
aclnode->z_size = aclsize;
|
|
|
|
if (!zp->z_is_sa) {
|
|
if (znode_acl.z_acl_extern_obj) {
|
|
error = dmu_read(ZTOZSB(zp)->z_os,
|
|
znode_acl.z_acl_extern_obj, 0, aclnode->z_size,
|
|
aclnode->z_acldata, DMU_READ_PREFETCH);
|
|
} else {
|
|
memcpy(aclnode->z_acldata, znode_acl.z_ace_data,
|
|
aclnode->z_size);
|
|
}
|
|
} else {
|
|
error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_ACES(ZTOZSB(zp)),
|
|
aclnode->z_acldata, aclnode->z_size);
|
|
}
|
|
|
|
if (error != 0) {
|
|
zfs_acl_free(aclp);
|
|
zfs_acl_node_free(aclnode);
|
|
/* convert checksum errors into IO errors */
|
|
if (error == ECKSUM)
|
|
error = SET_ERROR(EIO);
|
|
goto done;
|
|
}
|
|
|
|
list_insert_head(&aclp->z_acl, aclnode);
|
|
|
|
*aclpp = aclp;
|
|
if (!will_modify)
|
|
zp->z_acl_cached = aclp;
|
|
done:
|
|
if (drop_lock)
|
|
mutex_exit(&zp->z_lock);
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
zfs_acl_data_locator(void **dataptr, uint32_t *length, uint32_t buflen,
|
|
boolean_t start, void *userdata)
|
|
{
|
|
(void) buflen;
|
|
zfs_acl_locator_cb_t *cb = (zfs_acl_locator_cb_t *)userdata;
|
|
|
|
if (start) {
|
|
cb->cb_acl_node = list_head(&cb->cb_aclp->z_acl);
|
|
} else {
|
|
cb->cb_acl_node = list_next(&cb->cb_aclp->z_acl,
|
|
cb->cb_acl_node);
|
|
}
|
|
ASSERT3P(cb->cb_acl_node, !=, NULL);
|
|
*dataptr = cb->cb_acl_node->z_acldata;
|
|
*length = cb->cb_acl_node->z_size;
|
|
}
|
|
|
|
int
|
|
zfs_acl_chown_setattr(znode_t *zp)
|
|
{
|
|
int error;
|
|
zfs_acl_t *aclp;
|
|
|
|
if (ZTOZSB(zp)->z_acl_type == ZFS_ACLTYPE_POSIX)
|
|
return (0);
|
|
|
|
ASSERT(MUTEX_HELD(&zp->z_lock));
|
|
ASSERT(MUTEX_HELD(&zp->z_acl_lock));
|
|
|
|
error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE);
|
|
if (error == 0 && aclp->z_acl_count > 0)
|
|
zp->z_mode = ZTOI(zp)->i_mode =
|
|
zfs_mode_compute(zp->z_mode, aclp,
|
|
&zp->z_pflags, KUID_TO_SUID(ZTOI(zp)->i_uid),
|
|
KGID_TO_SGID(ZTOI(zp)->i_gid));
|
|
|
|
/*
|
|
* Some ZFS implementations (ZEVO) create neither a ZNODE_ACL
|
|
* nor a DACL_ACES SA in which case ENOENT is returned from
|
|
* zfs_acl_node_read() when the SA can't be located.
|
|
* Allow chown/chgrp to succeed in these cases rather than
|
|
* returning an error that makes no sense in the context of
|
|
* the caller.
|
|
*/
|
|
if (error == ENOENT)
|
|
return (0);
|
|
|
|
return (error);
|
|
}
|
|
|
|
typedef struct trivial_acl {
|
|
uint32_t allow0; /* allow mask for bits only in owner */
|
|
uint32_t deny1; /* deny mask for bits not in owner */
|
|
uint32_t deny2; /* deny mask for bits not in group */
|
|
uint32_t owner; /* allow mask matching mode */
|
|
uint32_t group; /* allow mask matching mode */
|
|
uint32_t everyone; /* allow mask matching mode */
|
|
} trivial_acl_t;
|
|
|
|
static void
|
|
acl_trivial_access_masks(mode_t mode, boolean_t isdir, trivial_acl_t *masks)
|
|
{
|
|
uint32_t read_mask = ACE_READ_DATA;
|
|
uint32_t write_mask = ACE_WRITE_DATA|ACE_APPEND_DATA;
|
|
uint32_t execute_mask = ACE_EXECUTE;
|
|
|
|
if (isdir)
|
|
write_mask |= ACE_DELETE_CHILD;
|
|
|
|
masks->deny1 = 0;
|
|
|
|
if (!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH)))
|
|
masks->deny1 |= read_mask;
|
|
if (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH)))
|
|
masks->deny1 |= write_mask;
|
|
if (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH)))
|
|
masks->deny1 |= execute_mask;
|
|
|
|
masks->deny2 = 0;
|
|
if (!(mode & S_IRGRP) && (mode & S_IROTH))
|
|
masks->deny2 |= read_mask;
|
|
if (!(mode & S_IWGRP) && (mode & S_IWOTH))
|
|
masks->deny2 |= write_mask;
|
|
if (!(mode & S_IXGRP) && (mode & S_IXOTH))
|
|
masks->deny2 |= execute_mask;
|
|
|
|
masks->allow0 = 0;
|
|
if ((mode & S_IRUSR) && (!(mode & S_IRGRP) && (mode & S_IROTH)))
|
|
masks->allow0 |= read_mask;
|
|
if ((mode & S_IWUSR) && (!(mode & S_IWGRP) && (mode & S_IWOTH)))
|
|
masks->allow0 |= write_mask;
|
|
if ((mode & S_IXUSR) && (!(mode & S_IXGRP) && (mode & S_IXOTH)))
|
|
masks->allow0 |= execute_mask;
|
|
|
|
masks->owner = ACE_WRITE_ATTRIBUTES|ACE_WRITE_OWNER|ACE_WRITE_ACL|
|
|
ACE_WRITE_NAMED_ATTRS|ACE_READ_ACL|ACE_READ_ATTRIBUTES|
|
|
ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE;
|
|
if (mode & S_IRUSR)
|
|
masks->owner |= read_mask;
|
|
if (mode & S_IWUSR)
|
|
masks->owner |= write_mask;
|
|
if (mode & S_IXUSR)
|
|
masks->owner |= execute_mask;
|
|
|
|
masks->group = ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_NAMED_ATTRS|
|
|
ACE_SYNCHRONIZE;
|
|
if (mode & S_IRGRP)
|
|
masks->group |= read_mask;
|
|
if (mode & S_IWGRP)
|
|
masks->group |= write_mask;
|
|
if (mode & S_IXGRP)
|
|
masks->group |= execute_mask;
|
|
|
|
masks->everyone = ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_NAMED_ATTRS|
|
|
ACE_SYNCHRONIZE;
|
|
if (mode & S_IROTH)
|
|
masks->everyone |= read_mask;
|
|
if (mode & S_IWOTH)
|
|
masks->everyone |= write_mask;
|
|
if (mode & S_IXOTH)
|
|
masks->everyone |= execute_mask;
|
|
}
|
|
|
|
/*
|
|
* ace_trivial:
|
|
* determine whether an ace_t acl is trivial
|
|
*
|
|
* Trivialness implies that the acl is composed of only
|
|
* owner, group, everyone entries. ACL can't
|
|
* have read_acl denied, and write_owner/write_acl/write_attributes
|
|
* can only be owner@ entry.
|
|
*/
|
|
static int
|
|
ace_trivial_common(void *acep, int aclcnt,
|
|
uintptr_t (*walk)(void *, uintptr_t, int,
|
|
uint16_t *, uint16_t *, uint32_t *))
|
|
{
|
|
uint16_t flags;
|
|
uint32_t mask;
|
|
uint16_t type;
|
|
uint64_t cookie = 0;
|
|
|
|
while ((cookie = walk(acep, cookie, aclcnt, &flags, &type, &mask))) {
|
|
switch (flags & ACE_TYPE_FLAGS) {
|
|
case ACE_OWNER:
|
|
case ACE_GROUP|ACE_IDENTIFIER_GROUP:
|
|
case ACE_EVERYONE:
|
|
break;
|
|
default:
|
|
return (1);
|
|
}
|
|
|
|
if (flags & (ACE_FILE_INHERIT_ACE|
|
|
ACE_DIRECTORY_INHERIT_ACE|ACE_NO_PROPAGATE_INHERIT_ACE|
|
|
ACE_INHERIT_ONLY_ACE))
|
|
return (1);
|
|
|
|
/*
|
|
* Special check for some special bits
|
|
*
|
|
* Don't allow anybody to deny reading basic
|
|
* attributes or a files ACL.
|
|
*/
|
|
if ((mask & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
|
|
(type == ACE_ACCESS_DENIED_ACE_TYPE))
|
|
return (1);
|
|
|
|
/*
|
|
* Delete permission is never set by default
|
|
*/
|
|
if (mask & ACE_DELETE)
|
|
return (1);
|
|
|
|
/*
|
|
* Child delete permission should be accompanied by write
|
|
*/
|
|
if ((mask & ACE_DELETE_CHILD) && !(mask & ACE_WRITE_DATA))
|
|
return (1);
|
|
|
|
/*
|
|
* only allow owner@ to have
|
|
* write_acl/write_owner/write_attributes/write_xattr/
|
|
*/
|
|
if (type == ACE_ACCESS_ALLOWED_ACE_TYPE &&
|
|
(!(flags & ACE_OWNER) && (mask &
|
|
(ACE_WRITE_OWNER|ACE_WRITE_ACL| ACE_WRITE_ATTRIBUTES|
|
|
ACE_WRITE_NAMED_ATTRS))))
|
|
return (1);
|
|
|
|
}
|
|
|
|
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, dmu_tx_t *tx)
|
|
{
|
|
int error;
|
|
zfsvfs_t *zfsvfs = ZTOZSB(zp);
|
|
dmu_object_type_t otype;
|
|
zfs_acl_locator_cb_t locate = { 0 };
|
|
uint64_t mode;
|
|
sa_bulk_attr_t bulk[5];
|
|
uint64_t ctime[2];
|
|
int count = 0;
|
|
zfs_acl_phys_t acl_phys;
|
|
|
|
mode = zp->z_mode;
|
|
|
|
mode = zfs_mode_compute(mode, aclp, &zp->z_pflags,
|
|
KUID_TO_SUID(ZTOI(zp)->i_uid), KGID_TO_SGID(ZTOI(zp)->i_gid));
|
|
|
|
zp->z_mode = ZTOI(zp)->i_mode = mode;
|
|
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
|
|
&mode, sizeof (mode));
|
|
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
|
|
&zp->z_pflags, sizeof (zp->z_pflags));
|
|
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
|
|
&ctime, sizeof (ctime));
|
|
|
|
if (zp->z_acl_cached) {
|
|
zfs_acl_free(zp->z_acl_cached);
|
|
zp->z_acl_cached = NULL;
|
|
}
|
|
|
|
/*
|
|
* Upgrade needed?
|
|
*/
|
|
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, cr);
|
|
ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
|
|
otype = DMU_OT_ACL;
|
|
}
|
|
|
|
/*
|
|
* Arrgh, we have to handle old on disk format
|
|
* as well as newer (preferred) SA format.
|
|
*/
|
|
|
|
if (zp->z_is_sa) { /* the easy case, just update the ACL attribute */
|
|
locate.cb_aclp = aclp;
|
|
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_ACES(zfsvfs),
|
|
zfs_acl_data_locator, &locate, aclp->z_acl_bytes);
|
|
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_COUNT(zfsvfs),
|
|
NULL, &aclp->z_acl_count, sizeof (uint64_t));
|
|
} else { /* Painful legacy way */
|
|
zfs_acl_node_t *aclnode;
|
|
uint64_t off = 0;
|
|
uint64_t aoid;
|
|
|
|
if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs),
|
|
&acl_phys, sizeof (acl_phys))) != 0)
|
|
return (error);
|
|
|
|
aoid = acl_phys.z_acl_extern_obj;
|
|
|
|
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 != acl_phys.z_acl_version) {
|
|
error = dmu_object_free(zfsvfs->z_os, aoid, 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_OLD_MAX_BONUSLEN : 0, tx);
|
|
} else {
|
|
(void) dmu_object_set_blocksize(zfsvfs->z_os,
|
|
aoid, aclp->z_acl_bytes, 0, tx);
|
|
}
|
|
acl_phys.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 = acl_phys.z_ace_data;
|
|
/*
|
|
* Migrating back embedded?
|
|
*/
|
|
if (acl_phys.z_acl_extern_obj) {
|
|
error = dmu_object_free(zfsvfs->z_os,
|
|
acl_phys.z_acl_extern_obj, tx);
|
|
if (error)
|
|
return (error);
|
|
acl_phys.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;
|
|
memcpy(start, aclnode->z_acldata,
|
|
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) {
|
|
acl_phys.z_acl_size = aclp->z_acl_count;
|
|
acl_phys.z_acl_count = aclp->z_acl_bytes;
|
|
} else {
|
|
acl_phys.z_acl_size = aclp->z_acl_bytes;
|
|
acl_phys.z_acl_count = aclp->z_acl_count;
|
|
}
|
|
acl_phys.z_acl_version = aclp->z_version;
|
|
|
|
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
|
|
&acl_phys, sizeof (acl_phys));
|
|
}
|
|
|
|
/*
|
|
* Replace ACL wide bits, but first clear them.
|
|
*/
|
|
zp->z_pflags &= ~ZFS_ACL_WIDE_FLAGS;
|
|
|
|
zp->z_pflags |= aclp->z_hints;
|
|
|
|
if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
|
|
zp->z_pflags |= ZFS_ACL_TRIVIAL;
|
|
|
|
zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime);
|
|
return (sa_bulk_update(zp->z_sa_hdl, bulk, count, tx));
|
|
}
|
|
|
|
static void
|
|
zfs_acl_chmod(boolean_t isdir, uint64_t mode, boolean_t split, boolean_t trim,
|
|
zfs_acl_t *aclp)
|
|
{
|
|
void *acep = NULL;
|
|
uint64_t who;
|
|
int new_count, new_bytes;
|
|
int ace_size;
|
|
int entry_type;
|
|
uint16_t iflags, type;
|
|
uint32_t access_mask;
|
|
zfs_acl_node_t *newnode;
|
|
size_t abstract_size = aclp->z_ops->ace_abstract_size();
|
|
void *zacep;
|
|
trivial_acl_t masks;
|
|
|
|
new_count = new_bytes = 0;
|
|
|
|
acl_trivial_access_masks((mode_t)mode, isdir, &masks);
|
|
|
|
newnode = zfs_acl_node_alloc((abstract_size * 6) + aclp->z_acl_bytes);
|
|
|
|
zacep = newnode->z_acldata;
|
|
if (masks.allow0) {
|
|
zfs_set_ace(aclp, zacep, masks.allow0, ALLOW, -1, ACE_OWNER);
|
|
zacep = (void *)((uintptr_t)zacep + abstract_size);
|
|
new_count++;
|
|
new_bytes += abstract_size;
|
|
}
|
|
if (masks.deny1) {
|
|
zfs_set_ace(aclp, zacep, masks.deny1, DENY, -1, ACE_OWNER);
|
|
zacep = (void *)((uintptr_t)zacep + abstract_size);
|
|
new_count++;
|
|
new_bytes += abstract_size;
|
|
}
|
|
if (masks.deny2) {
|
|
zfs_set_ace(aclp, zacep, masks.deny2, DENY, -1, OWNING_GROUP);
|
|
zacep = (void *)((uintptr_t)zacep + abstract_size);
|
|
new_count++;
|
|
new_bytes += abstract_size;
|
|
}
|
|
|
|
while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
|
|
&iflags, &type))) {
|
|
entry_type = (iflags & ACE_TYPE_FLAGS);
|
|
/*
|
|
* ACEs used to represent the file mode may be divided
|
|
* into an equivalent pair of inherit-only and regular
|
|
* ACEs, if they are inheritable.
|
|
* Skip regular ACEs, which are replaced by the new mode.
|
|
*/
|
|
if (split && (entry_type == ACE_OWNER ||
|
|
entry_type == OWNING_GROUP ||
|
|
entry_type == ACE_EVERYONE)) {
|
|
if (!isdir || !(iflags &
|
|
(ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
|
|
continue;
|
|
/*
|
|
* We preserve owner@, group@, or @everyone
|
|
* permissions, if they are inheritable, by
|
|
* copying them to inherit_only ACEs. This
|
|
* prevents inheritable permissions from being
|
|
* altered along with the file mode.
|
|
*/
|
|
iflags |= ACE_INHERIT_ONLY_ACE;
|
|
}
|
|
|
|
/*
|
|
* If this ACL has any inheritable ACEs, mark that in
|
|
* the hints (which are later masked into the pflags)
|
|
* so create knows to do inheritance.
|
|
*/
|
|
if (isdir && (iflags &
|
|
(ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
|
|
aclp->z_hints |= ZFS_INHERIT_ACE;
|
|
|
|
if ((type != ALLOW && type != DENY) ||
|
|
(iflags & ACE_INHERIT_ONLY_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;
|
|
}
|
|
} else {
|
|
/*
|
|
* Limit permissions to be no greater than
|
|
* group permissions.
|
|
* The "aclinherit" and "aclmode" properties
|
|
* affect policy for create and chmod(2),
|
|
* respectively.
|
|
*/
|
|
if ((type == ALLOW) && trim)
|
|
access_mask &= masks.group;
|
|
}
|
|
zfs_set_ace(aclp, zacep, access_mask, type, who, iflags);
|
|
ace_size = aclp->z_ops->ace_size(acep);
|
|
zacep = (void *)((uintptr_t)zacep + ace_size);
|
|
new_count++;
|
|
new_bytes += ace_size;
|
|
}
|
|
zfs_set_ace(aclp, zacep, masks.owner, ALLOW, -1, ACE_OWNER);
|
|
zacep = (void *)((uintptr_t)zacep + abstract_size);
|
|
zfs_set_ace(aclp, zacep, masks.group, ALLOW, -1, OWNING_GROUP);
|
|
zacep = (void *)((uintptr_t)zacep + abstract_size);
|
|
zfs_set_ace(aclp, zacep, masks.everyone, ALLOW, -1, ACE_EVERYONE);
|
|
|
|
new_count += 3;
|
|
new_bytes += abstract_size * 3;
|
|
zfs_acl_release_nodes(aclp);
|
|
aclp->z_acl_count = new_count;
|
|
aclp->z_acl_bytes = new_bytes;
|
|
newnode->z_ace_count = new_count;
|
|
newnode->z_size = new_bytes;
|
|
list_insert_tail(&aclp->z_acl, newnode);
|
|
}
|
|
|
|
int
|
|
zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
|
|
{
|
|
int error = 0;
|
|
|
|
mutex_enter(&zp->z_acl_lock);
|
|
mutex_enter(&zp->z_lock);
|
|
if (ZTOZSB(zp)->z_acl_mode == ZFS_ACL_DISCARD)
|
|
*aclp = zfs_acl_alloc(zfs_acl_version_zp(zp));
|
|
else
|
|
error = zfs_acl_node_read(zp, B_TRUE, aclp, B_TRUE);
|
|
|
|
if (error == 0) {
|
|
(*aclp)->z_hints = zp->z_pflags & V4_ACL_WIDE_FLAGS;
|
|
zfs_acl_chmod(S_ISDIR(ZTOI(zp)->i_mode), mode, B_TRUE,
|
|
(ZTOZSB(zp)->z_acl_mode == ZFS_ACL_GROUPMASK), *aclp);
|
|
}
|
|
mutex_exit(&zp->z_lock);
|
|
mutex_exit(&zp->z_acl_lock);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Should ACE be inherited?
|
|
*/
|
|
static int
|
|
zfs_ace_can_use(umode_t obj_mode, uint16_t acep_flags)
|
|
{
|
|
int iflags = (acep_flags & 0xf);
|
|
|
|
if (S_ISDIR(obj_mode) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
|
|
return (1);
|
|
else if (iflags & ACE_FILE_INHERIT_ACE)
|
|
return (!(S_ISDIR(obj_mode) &&
|
|
(iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* inherit inheritable ACEs from parent
|
|
*/
|
|
static zfs_acl_t *
|
|
zfs_acl_inherit(zfsvfs_t *zfsvfs, umode_t va_mode, zfs_acl_t *paclp,
|
|
uint64_t mode, boolean_t *need_chmod)
|
|
{
|
|
void *pacep = NULL;
|
|
void *acep;
|
|
zfs_acl_node_t *aclnode;
|
|
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;
|
|
uint_t aclinherit;
|
|
boolean_t isdir = S_ISDIR(va_mode);
|
|
boolean_t isreg = S_ISREG(va_mode);
|
|
|
|
*need_chmod = B_TRUE;
|
|
|
|
aclp = zfs_acl_alloc(paclp->z_version);
|
|
aclinherit = zfsvfs->z_acl_inherit;
|
|
if (aclinherit == ZFS_ACL_DISCARD || S_ISLNK(va_mode))
|
|
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;
|
|
|
|
/*
|
|
* Check if ACE is inheritable by this vnode
|
|
*/
|
|
if ((aclinherit == ZFS_ACL_NOALLOW && type == ALLOW) ||
|
|
!zfs_ace_can_use(va_mode, iflags))
|
|
continue;
|
|
|
|
/*
|
|
* If owner@, group@, or everyone@ inheritable
|
|
* then zfs_acl_chmod() isn't needed.
|
|
*/
|
|
if ((aclinherit == ZFS_ACL_PASSTHROUGH ||
|
|
aclinherit == ZFS_ACL_PASSTHROUGH_X) &&
|
|
((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
|
|
((iflags & OWNING_GROUP) == OWNING_GROUP)) &&
|
|
(isreg || (isdir && (iflags & ACE_DIRECTORY_INHERIT_ACE))))
|
|
*need_chmod = B_FALSE;
|
|
|
|
/*
|
|
* Strip inherited execute permission from file if
|
|
* not in mode
|
|
*/
|
|
if (aclinherit == ZFS_ACL_PASSTHROUGH_X && type == ALLOW &&
|
|
!isdir && ((mode & (S_IXUSR|S_IXGRP|S_IXOTH)) == 0)) {
|
|
access_mask &= ~ACE_EXECUTE;
|
|
}
|
|
|
|
/*
|
|
* Strip write_acl and write_owner from permissions
|
|
* when inheriting an ACE
|
|
*/
|
|
if (aclinherit == ZFS_ACL_RESTRICTED && type == ALLOW) {
|
|
access_mask &= ~RESTRICTED_CLEAR;
|
|
}
|
|
|
|
ace_size = aclp->z_ops->ace_size(pacep);
|
|
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);
|
|
memcpy(data2, data1, 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 ACE is not to be inherited further, or if the vnode is
|
|
* not a directory, remove all inheritance flags
|
|
*/
|
|
if (!isdir || (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)) {
|
|
newflags &= ~ALL_INHERIT;
|
|
aclp->z_ops->ace_flags_set(acep,
|
|
newflags|ACE_INHERITED_ACE);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* This directory has an inheritable ACE
|
|
*/
|
|
aclp->z_hints |= ZFS_INHERIT_ACE;
|
|
|
|
/*
|
|
* If only FILE_INHERIT is set then turn on
|
|
* inherit_only
|
|
*/
|
|
if ((iflags & (ACE_FILE_INHERIT_ACE |
|
|
ACE_DIRECTORY_INHERIT_ACE)) == ACE_FILE_INHERIT_ACE) {
|
|
newflags |= ACE_INHERIT_ONLY_ACE;
|
|
aclp->z_ops->ace_flags_set(acep,
|
|
newflags|ACE_INHERITED_ACE);
|
|
} else {
|
|
newflags &= ~ACE_INHERIT_ONLY_ACE;
|
|
aclp->z_ops->ace_flags_set(acep,
|
|
newflags|ACE_INHERITED_ACE);
|
|
}
|
|
}
|
|
if (zfsvfs->z_acl_mode == ZFS_ACL_RESTRICTED &&
|
|
aclp->z_acl_count != 0) {
|
|
*need_chmod = B_FALSE;
|
|
}
|
|
|
|
return (aclp);
|
|
}
|
|
|
|
/*
|
|
* Create file system object initial permissions
|
|
* including inheritable ACEs.
|
|
* Also, create FUIDs for owner and group.
|
|
*/
|
|
int
|
|
zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
|
|
vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids, zuserns_t *mnt_ns)
|
|
{
|
|
int error;
|
|
zfsvfs_t *zfsvfs = ZTOZSB(dzp);
|
|
zfs_acl_t *paclp;
|
|
gid_t gid = vap->va_gid;
|
|
boolean_t need_chmod = B_TRUE;
|
|
boolean_t trim = B_FALSE;
|
|
boolean_t inherited = B_FALSE;
|
|
|
|
memset(acl_ids, 0, sizeof (zfs_acl_ids_t));
|
|
acl_ids->z_mode = vap->va_mode;
|
|
|
|
if (vsecp)
|
|
if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_mode, vsecp,
|
|
cr, &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
|
|
return (error);
|
|
|
|
acl_ids->z_fuid = vap->va_uid;
|
|
acl_ids->z_fgid = vap->va_gid;
|
|
#ifdef HAVE_KSID
|
|
/*
|
|
* Determine uid and gid.
|
|
*/
|
|
if ((flag & IS_ROOT_NODE) || zfsvfs->z_replay ||
|
|
((flag & IS_XATTR) && (S_ISDIR(vap->va_mode)))) {
|
|
acl_ids->z_fuid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_uid,
|
|
cr, ZFS_OWNER, &acl_ids->z_fuidp);
|
|
acl_ids->z_fgid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid,
|
|
cr, ZFS_GROUP, &acl_ids->z_fuidp);
|
|
gid = vap->va_gid;
|
|
} else {
|
|
acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER,
|
|
cr, &acl_ids->z_fuidp);
|
|
acl_ids->z_fgid = 0;
|
|
if (vap->va_mask & AT_GID) {
|
|
acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
|
|
(uint64_t)vap->va_gid,
|
|
cr, ZFS_GROUP, &acl_ids->z_fuidp);
|
|
gid = vap->va_gid;
|
|
if (acl_ids->z_fgid != KGID_TO_SGID(ZTOI(dzp)->i_gid) &&
|
|
!groupmember(vap->va_gid, cr) &&
|
|
secpolicy_vnode_create_gid(cr) != 0)
|
|
acl_ids->z_fgid = 0;
|
|
}
|
|
if (acl_ids->z_fgid == 0) {
|
|
if (dzp->z_mode & S_ISGID) {
|
|
char *domain;
|
|
uint32_t rid;
|
|
|
|
acl_ids->z_fgid = KGID_TO_SGID(
|
|
ZTOI(dzp)->i_gid);
|
|
gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
|
|
cr, ZFS_GROUP);
|
|
|
|
if (zfsvfs->z_use_fuids &&
|
|
IS_EPHEMERAL(acl_ids->z_fgid)) {
|
|
domain = zfs_fuid_idx_domain(
|
|
&zfsvfs->z_fuid_idx,
|
|
FUID_INDEX(acl_ids->z_fgid));
|
|
rid = FUID_RID(acl_ids->z_fgid);
|
|
zfs_fuid_node_add(&acl_ids->z_fuidp,
|
|
domain, rid,
|
|
FUID_INDEX(acl_ids->z_fgid),
|
|
acl_ids->z_fgid, ZFS_GROUP);
|
|
}
|
|
} else {
|
|
acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
|
|
ZFS_GROUP, cr, &acl_ids->z_fuidp);
|
|
gid = crgetgid(cr);
|
|
}
|
|
}
|
|
}
|
|
#endif /* HAVE_KSID */
|
|
|
|
/*
|
|
* 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 (!(flag & IS_ROOT_NODE) && (dzp->z_mode & S_ISGID) &&
|
|
(S_ISDIR(vap->va_mode))) {
|
|
acl_ids->z_mode |= S_ISGID;
|
|
} else {
|
|
if ((acl_ids->z_mode & S_ISGID) &&
|
|
secpolicy_vnode_setids_setgids(cr, gid, mnt_ns) != 0) {
|
|
acl_ids->z_mode &= ~S_ISGID;
|
|
}
|
|
}
|
|
|
|
if (acl_ids->z_aclp == NULL) {
|
|
mutex_enter(&dzp->z_acl_lock);
|
|
mutex_enter(&dzp->z_lock);
|
|
if (!(flag & IS_ROOT_NODE) &&
|
|
(dzp->z_pflags & ZFS_INHERIT_ACE) &&
|
|
!(dzp->z_pflags & ZFS_XATTR)) {
|
|
VERIFY(0 == zfs_acl_node_read(dzp, B_TRUE,
|
|
&paclp, B_FALSE));
|
|
acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
|
|
vap->va_mode, paclp, acl_ids->z_mode, &need_chmod);
|
|
inherited = B_TRUE;
|
|
} else {
|
|
acl_ids->z_aclp =
|
|
zfs_acl_alloc(zfs_acl_version_zp(dzp));
|
|
acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
|
|
}
|
|
mutex_exit(&dzp->z_lock);
|
|
mutex_exit(&dzp->z_acl_lock);
|
|
|
|
if (need_chmod) {
|
|
if (S_ISDIR(vap->va_mode))
|
|
acl_ids->z_aclp->z_hints |=
|
|
ZFS_ACL_AUTO_INHERIT;
|
|
|
|
if (zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK &&
|
|
zfsvfs->z_acl_inherit != ZFS_ACL_PASSTHROUGH &&
|
|
zfsvfs->z_acl_inherit != ZFS_ACL_PASSTHROUGH_X)
|
|
trim = B_TRUE;
|
|
zfs_acl_chmod(vap->va_mode, acl_ids->z_mode, B_FALSE,
|
|
trim, acl_ids->z_aclp);
|
|
}
|
|
}
|
|
|
|
if (inherited || vsecp) {
|
|
acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode,
|
|
acl_ids->z_aclp, &acl_ids->z_aclp->z_hints,
|
|
acl_ids->z_fuid, acl_ids->z_fgid);
|
|
if (ace_trivial_common(acl_ids->z_aclp, 0, zfs_ace_walk) == 0)
|
|
acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Free ACL and fuid_infop, but not the acl_ids structure
|
|
*/
|
|
void
|
|
zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
|
|
{
|
|
if (acl_ids->z_aclp)
|
|
zfs_acl_free(acl_ids->z_aclp);
|
|
if (acl_ids->z_fuidp)
|
|
zfs_fuid_info_free(acl_ids->z_fuidp);
|
|
acl_ids->z_aclp = NULL;
|
|
acl_ids->z_fuidp = NULL;
|
|
}
|
|
|
|
boolean_t
|
|
zfs_acl_ids_overquota(zfsvfs_t *zv, zfs_acl_ids_t *acl_ids, uint64_t projid)
|
|
{
|
|
return (zfs_id_overquota(zv, DMU_USERUSED_OBJECT, acl_ids->z_fuid) ||
|
|
zfs_id_overquota(zv, DMU_GROUPUSED_OBJECT, acl_ids->z_fgid) ||
|
|
(projid != ZFS_DEFAULT_PROJID && projid != ZFS_INVALID_PROJID &&
|
|
zfs_id_overquota(zv, DMU_PROJECTUSED_OBJECT, projid)));
|
|
}
|
|
|
|
/*
|
|
* Retrieve a file's 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 (mask == 0)
|
|
return (SET_ERROR(ENOSYS));
|
|
|
|
if ((error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr, NULL)))
|
|
return (error);
|
|
|
|
mutex_enter(&zp->z_acl_lock);
|
|
|
|
error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
|
|
if (error != 0) {
|
|
mutex_exit(&zp->z_acl_lock);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Scan ACL to determine number of ACEs
|
|
*/
|
|
if ((zp->z_pflags & 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 = (int)aclp->z_acl_count;
|
|
|
|
if (mask & VSA_ACECNT) {
|
|
vsecp->vsa_aclcnt = count;
|
|
}
|
|
|
|
if (mask & VSA_ACE) {
|
|
size_t aclsz;
|
|
|
|
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(ZTOZSB(zp), aclp, cr,
|
|
vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
|
|
else {
|
|
zfs_acl_node_t *aclnode;
|
|
void *start = vsecp->vsa_aclentp;
|
|
|
|
for (aclnode = list_head(&aclp->z_acl); aclnode;
|
|
aclnode = list_next(&aclp->z_acl, aclnode)) {
|
|
memcpy(start, aclnode->z_acldata,
|
|
aclnode->z_size);
|
|
start = (caddr_t)start + aclnode->z_size;
|
|
}
|
|
ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp ==
|
|
aclp->z_acl_bytes);
|
|
}
|
|
}
|
|
if (mask & VSA_ACE_ACLFLAGS) {
|
|
vsecp->vsa_aclflags = 0;
|
|
if (zp->z_pflags & ZFS_ACL_DEFAULTED)
|
|
vsecp->vsa_aclflags |= ACL_DEFAULTED;
|
|
if (zp->z_pflags & ZFS_ACL_PROTECTED)
|
|
vsecp->vsa_aclflags |= ACL_PROTECTED;
|
|
if (zp->z_pflags & ZFS_ACL_AUTO_INHERIT)
|
|
vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
|
|
}
|
|
|
|
mutex_exit(&zp->z_acl_lock);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, umode_t obj_mode,
|
|
vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, 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 (SET_ERROR(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_mode, 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(zfsvfs, obj_mode, aclp,
|
|
vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
|
|
&aclnode->z_size, fuidp, cr)) != 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 file's ACL
|
|
*/
|
|
int
|
|
zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
|
|
{
|
|
zfsvfs_t *zfsvfs = ZTOZSB(zp);
|
|
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;
|
|
boolean_t fuid_dirtied;
|
|
uint64_t acl_obj;
|
|
|
|
if (mask == 0)
|
|
return (SET_ERROR(ENOSYS));
|
|
|
|
if (zp->z_pflags & ZFS_IMMUTABLE)
|
|
return (SET_ERROR(EPERM));
|
|
|
|
if ((error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr, NULL)))
|
|
return (error);
|
|
|
|
error = zfs_vsec_2_aclp(zfsvfs, ZTOI(zp)->i_mode, vsecp, cr, &fuidp,
|
|
&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_pflags & V4_ACL_WIDE_FLAGS);
|
|
}
|
|
top:
|
|
mutex_enter(&zp->z_acl_lock);
|
|
mutex_enter(&zp->z_lock);
|
|
|
|
tx = dmu_tx_create(zfsvfs->z_os);
|
|
|
|
dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
|
|
|
|
fuid_dirtied = zfsvfs->z_fuid_dirty;
|
|
if (fuid_dirtied)
|
|
zfs_fuid_txhold(zfsvfs, tx);
|
|
|
|
/*
|
|
* If old version and ACL won't fit in bonus and we aren't
|
|
* upgrading then take out necessary DMU holds
|
|
*/
|
|
|
|
if ((acl_obj = zfs_external_acl(zp)) != 0) {
|
|
if (zfsvfs->z_version >= ZPL_VERSION_FUID &&
|
|
zfs_znode_acl_version(zp) <= ZFS_ACL_VERSION_INITIAL) {
|
|
dmu_tx_hold_free(tx, acl_obj, 0,
|
|
DMU_OBJECT_END);
|
|
dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
|
|
aclp->z_acl_bytes);
|
|
} else {
|
|
dmu_tx_hold_write(tx, acl_obj, 0, aclp->z_acl_bytes);
|
|
}
|
|
} else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
|
|
dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
|
|
}
|
|
|
|
zfs_sa_upgrade_txholds(tx, zp);
|
|
error = dmu_tx_assign(tx, TXG_NOWAIT);
|
|
if (error) {
|
|
mutex_exit(&zp->z_acl_lock);
|
|
mutex_exit(&zp->z_lock);
|
|
|
|
if (error == ERESTART) {
|
|
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, tx);
|
|
ASSERT(error == 0);
|
|
ASSERT(zp->z_acl_cached == NULL);
|
|
zp->z_acl_cached = aclp;
|
|
|
|
if (fuid_dirtied)
|
|
zfs_fuid_sync(zfsvfs, tx);
|
|
|
|
zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
|
|
|
|
if (fuidp)
|
|
zfs_fuid_info_free(fuidp);
|
|
dmu_tx_commit(tx);
|
|
|
|
mutex_exit(&zp->z_lock);
|
|
mutex_exit(&zp->z_acl_lock);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check accesses of interest (AoI) against attributes of the dataset
|
|
* such as read-only. Returns zero if no AoI conflict with dataset
|
|
* attributes, otherwise an appropriate errno is returned.
|
|
*/
|
|
static int
|
|
zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
|
|
{
|
|
if ((v4_mode & WRITE_MASK) && (zfs_is_readonly(ZTOZSB(zp))) &&
|
|
(!Z_ISDEV(ZTOI(zp)->i_mode) ||
|
|
(Z_ISDEV(ZTOI(zp)->i_mode) && (v4_mode & WRITE_MASK_ATTRS)))) {
|
|
return (SET_ERROR(EROFS));
|
|
}
|
|
|
|
/*
|
|
* Intentionally allow ZFS_READONLY through here.
|
|
* See zfs_zaccess_common().
|
|
*/
|
|
if ((v4_mode & WRITE_MASK_DATA) &&
|
|
(zp->z_pflags & ZFS_IMMUTABLE)) {
|
|
return (SET_ERROR(EPERM));
|
|
}
|
|
|
|
if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
|
|
(zp->z_pflags & ZFS_NOUNLINK)) {
|
|
return (SET_ERROR(EPERM));
|
|
}
|
|
|
|
if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
|
|
(zp->z_pflags & ZFS_AV_QUARANTINED))) {
|
|
return (SET_ERROR(EACCES));
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The primary usage of this function is to loop through all of the
|
|
* ACEs in the znode, determining what accesses of interest (AoI) to
|
|
* the caller are allowed or denied. The AoI are expressed as bits in
|
|
* the working_mode parameter. As each ACE is processed, bits covered
|
|
* by that ACE are removed from the working_mode. This removal
|
|
* facilitates two things. The first is that when the working mode is
|
|
* empty (= 0), we know we've looked at all the AoI. The second is
|
|
* that the ACE interpretation rules don't allow a later ACE to undo
|
|
* something granted or denied by an earlier ACE. Removing the
|
|
* discovered access or denial enforces this rule. At the end of
|
|
* processing the ACEs, all AoI that were found to be denied are
|
|
* placed into the working_mode, giving the caller a mask of denied
|
|
* accesses. Returns:
|
|
* 0 if all AoI granted
|
|
* EACCES if the denied mask is non-zero
|
|
* other error if abnormal failure (e.g., IO error)
|
|
*
|
|
* A secondary usage of the function is to determine if any of the
|
|
* AoI are granted. If an ACE grants any access in
|
|
* the working_mode, we immediately short circuit out of the function.
|
|
* This mode is chosen by setting anyaccess to B_TRUE. The
|
|
* working_mode is not a denied access mask upon exit if the function
|
|
* is used in this manner.
|
|
*/
|
|
static int
|
|
zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
|
|
boolean_t anyaccess, cred_t *cr, zuserns_t *mnt_ns)
|
|
{
|
|
zfsvfs_t *zfsvfs = ZTOZSB(zp);
|
|
zfs_acl_t *aclp;
|
|
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 gowner;
|
|
uid_t fowner;
|
|
|
|
if (mnt_ns) {
|
|
fowner = zfs_uid_into_mnt(mnt_ns,
|
|
KUID_TO_SUID(ZTOI(zp)->i_uid));
|
|
gowner = zfs_gid_into_mnt(mnt_ns,
|
|
KGID_TO_SGID(ZTOI(zp)->i_gid));
|
|
} else
|
|
zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
|
|
|
|
mutex_enter(&zp->z_acl_lock);
|
|
|
|
error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
|
|
if (error != 0) {
|
|
mutex_exit(&zp->z_acl_lock);
|
|
return (error);
|
|
}
|
|
|
|
ASSERT(zp->z_acl_cached);
|
|
|
|
while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
|
|
&iflags, &type))) {
|
|
uint32_t mask_matched;
|
|
|
|
if (!zfs_acl_valid_ace_type(type, iflags))
|
|
continue;
|
|
|
|
if (S_ISDIR(ZTOI(zp)->i_mode) &&
|
|
(iflags & ACE_INHERIT_ONLY_ACE))
|
|
continue;
|
|
|
|
/* Skip ACE if it does not affect any AoI */
|
|
mask_matched = (access_mask & *working_mode);
|
|
if (!mask_matched)
|
|
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;
|
|
zfs_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 {
|
|
mutex_exit(&zp->z_acl_lock);
|
|
return (SET_ERROR(EIO));
|
|
}
|
|
}
|
|
|
|
if (checkit) {
|
|
if (type == DENY) {
|
|
DTRACE_PROBE3(zfs__ace__denies,
|
|
znode_t *, zp,
|
|
zfs_ace_hdr_t *, acep,
|
|
uint32_t, mask_matched);
|
|
deny_mask |= mask_matched;
|
|
} else {
|
|
DTRACE_PROBE3(zfs__ace__allows,
|
|
znode_t *, zp,
|
|
zfs_ace_hdr_t *, acep,
|
|
uint32_t, mask_matched);
|
|
if (anyaccess) {
|
|
mutex_exit(&zp->z_acl_lock);
|
|
return (0);
|
|
}
|
|
}
|
|
*working_mode &= ~mask_matched;
|
|
}
|
|
|
|
/* Are we done? */
|
|
if (*working_mode == 0)
|
|
break;
|
|
}
|
|
|
|
mutex_exit(&zp->z_acl_lock);
|
|
|
|
/* Put the found 'denies' back on the working mode */
|
|
if (deny_mask) {
|
|
*working_mode |= deny_mask;
|
|
return (SET_ERROR(EACCES));
|
|
} else if (*working_mode) {
|
|
return (-1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return true if any access whatsoever granted, we don't actually
|
|
* care what access is granted.
|
|
*/
|
|
boolean_t
|
|
zfs_has_access(znode_t *zp, cred_t *cr)
|
|
{
|
|
uint32_t have = ACE_ALL_PERMS;
|
|
|
|
if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr, NULL) != 0) {
|
|
uid_t owner;
|
|
|
|
owner = zfs_fuid_map_id(ZTOZSB(zp),
|
|
KUID_TO_SUID(ZTOI(zp)->i_uid), cr, ZFS_OWNER);
|
|
return (secpolicy_vnode_any_access(cr, ZTOI(zp), owner) == 0);
|
|
}
|
|
return (B_TRUE);
|
|
}
|
|
|
|
/*
|
|
* Simplified access check for case where ACL is known to not contain
|
|
* information beyond what is defined in the mode. In this case, we
|
|
* can pass along to the kernel / vfs generic_permission() check, which
|
|
* evaluates the mode and POSIX ACL.
|
|
*
|
|
* NFSv4 ACLs allow granting permissions that are usually relegated only
|
|
* to the file owner or superuser. Examples are ACE_WRITE_OWNER (chown),
|
|
* ACE_WRITE_ACL(chmod), and ACE_DELETE. ACE_DELETE requests must fail
|
|
* because with conventional posix permissions, right to delete file
|
|
* is determined by write bit on the parent dir.
|
|
*
|
|
* If unmappable perms are requested, then we must return EPERM
|
|
* and include those bits in the working_mode so that the caller of
|
|
* zfs_zaccess_common() can decide whether to perform additional
|
|
* policy / capability checks. EACCES is used in zfs_zaccess_aces_check()
|
|
* to indicate access check failed due to explicit DENY entry, and so
|
|
* we want to avoid that here.
|
|
*/
|
|
static int
|
|
zfs_zaccess_trivial(znode_t *zp, uint32_t *working_mode, cred_t *cr,
|
|
zuserns_t *mnt_ns)
|
|
{
|
|
int err, mask;
|
|
int unmapped = 0;
|
|
|
|
ASSERT(zp->z_pflags & ZFS_ACL_TRIVIAL);
|
|
|
|
mask = zfs_v4_to_unix(*working_mode, &unmapped);
|
|
if (mask == 0 || unmapped) {
|
|
*working_mode = unmapped;
|
|
return (unmapped ? SET_ERROR(EPERM) : 0);
|
|
}
|
|
|
|
#if defined(HAVE_IOPS_PERMISSION_USERNS)
|
|
if (mnt_ns)
|
|
err = generic_permission(mnt_ns, ZTOI(zp), mask);
|
|
else
|
|
err = generic_permission(cr->user_ns, ZTOI(zp), mask);
|
|
#else
|
|
err = generic_permission(ZTOI(zp), mask);
|
|
#endif
|
|
if (err != 0) {
|
|
return (SET_ERROR(EPERM));
|
|
}
|
|
|
|
*working_mode = unmapped;
|
|
|
|
return (0);
|
|
}
|
|
|
|
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, zuserns_t *mnt_ns)
|
|
{
|
|
zfsvfs_t *zfsvfs = ZTOZSB(zp);
|
|
int err;
|
|
|
|
*working_mode = v4_mode;
|
|
*check_privs = B_TRUE;
|
|
|
|
/*
|
|
* Short circuit empty requests
|
|
*/
|
|
if (v4_mode == 0 || zfsvfs->z_replay) {
|
|
*working_mode = 0;
|
|
return (0);
|
|
}
|
|
|
|
if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
|
|
*check_privs = B_FALSE;
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/*
|
|
* Note: ZFS_READONLY represents the "DOS R/O" attribute.
|
|
* When that flag is set, we should behave as if write access
|
|
* were not granted by anything in the ACL. In particular:
|
|
* We _must_ allow writes after opening the file r/w, then
|
|
* setting the DOS R/O attribute, and writing some more.
|
|
* (Similar to how you can write after fchmod(fd, 0444).)
|
|
*
|
|
* Therefore ZFS_READONLY is ignored in the dataset check
|
|
* above, and checked here as if part of the ACL check.
|
|
* Also note: DOS R/O is ignored for directories.
|
|
*/
|
|
if ((v4_mode & WRITE_MASK_DATA) &&
|
|
S_ISDIR(ZTOI(zp)->i_mode) &&
|
|
(zp->z_pflags & ZFS_READONLY)) {
|
|
return (SET_ERROR(EPERM));
|
|
}
|
|
|
|
if (zp->z_pflags & ZFS_ACL_TRIVIAL)
|
|
return (zfs_zaccess_trivial(zp, working_mode, cr, mnt_ns));
|
|
|
|
return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr, mnt_ns));
|
|
}
|
|
|
|
static int
|
|
zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
|
|
cred_t *cr, zuserns_t *mnt_ns)
|
|
{
|
|
if (*working_mode != ACE_WRITE_DATA)
|
|
return (SET_ERROR(EACCES));
|
|
|
|
return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
|
|
check_privs, B_FALSE, cr, mnt_ns));
|
|
}
|
|
|
|
int
|
|
zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
|
|
{
|
|
boolean_t owner = B_FALSE;
|
|
boolean_t groupmbr = B_FALSE;
|
|
boolean_t is_attr;
|
|
uid_t uid = crgetuid(cr);
|
|
int error;
|
|
|
|
if (zdp->z_pflags & ZFS_AV_QUARANTINED)
|
|
return (SET_ERROR(EACCES));
|
|
|
|
is_attr = ((zdp->z_pflags & ZFS_XATTR) &&
|
|
(S_ISDIR(ZTOI(zdp)->i_mode)));
|
|
if (is_attr)
|
|
goto slow;
|
|
|
|
|
|
mutex_enter(&zdp->z_acl_lock);
|
|
|
|
if (zdp->z_pflags & ZFS_NO_EXECS_DENIED) {
|
|
mutex_exit(&zdp->z_acl_lock);
|
|
return (0);
|
|
}
|
|
|
|
if (KUID_TO_SUID(ZTOI(zdp)->i_uid) != 0 ||
|
|
KGID_TO_SGID(ZTOI(zdp)->i_gid) != 0) {
|
|
mutex_exit(&zdp->z_acl_lock);
|
|
goto slow;
|
|
}
|
|
|
|
if (uid == KUID_TO_SUID(ZTOI(zdp)->i_uid)) {
|
|
owner = B_TRUE;
|
|
if (zdp->z_mode & S_IXUSR) {
|
|
mutex_exit(&zdp->z_acl_lock);
|
|
return (0);
|
|
} else {
|
|
mutex_exit(&zdp->z_acl_lock);
|
|
goto slow;
|
|
}
|
|
}
|
|
if (groupmember(KGID_TO_SGID(ZTOI(zdp)->i_gid), cr)) {
|
|
groupmbr = B_TRUE;
|
|
if (zdp->z_mode & S_IXGRP) {
|
|
mutex_exit(&zdp->z_acl_lock);
|
|
return (0);
|
|
} else {
|
|
mutex_exit(&zdp->z_acl_lock);
|
|
goto slow;
|
|
}
|
|
}
|
|
if (!owner && !groupmbr) {
|
|
if (zdp->z_mode & S_IXOTH) {
|
|
mutex_exit(&zdp->z_acl_lock);
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
mutex_exit(&zdp->z_acl_lock);
|
|
|
|
slow:
|
|
DTRACE_PROBE(zfs__fastpath__execute__access__miss);
|
|
if ((error = zfs_enter(ZTOZSB(zdp), FTAG)) != 0)
|
|
return (error);
|
|
error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr, NULL);
|
|
zfs_exit(ZTOZSB(zdp), FTAG);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Determine whether Access should be granted/denied.
|
|
*
|
|
* The least priv subsystem is always consulted as a basic privilege
|
|
* can define any form of access.
|
|
*/
|
|
int
|
|
zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr,
|
|
zuserns_t *mnt_ns)
|
|
{
|
|
uint32_t working_mode;
|
|
int error;
|
|
int is_attr;
|
|
boolean_t check_privs;
|
|
znode_t *xzp;
|
|
znode_t *check_zp = zp;
|
|
mode_t needed_bits;
|
|
uid_t owner;
|
|
|
|
is_attr = ((zp->z_pflags & ZFS_XATTR) && S_ISDIR(ZTOI(zp)->i_mode));
|
|
|
|
/*
|
|
* If attribute then validate against base file
|
|
*/
|
|
if (is_attr) {
|
|
if ((error = zfs_zget(ZTOZSB(zp),
|
|
zp->z_xattr_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;
|
|
}
|
|
}
|
|
|
|
owner = zfs_uid_into_mnt(mnt_ns, KUID_TO_SUID(ZTOI(zp)->i_uid));
|
|
owner = zfs_fuid_map_id(ZTOZSB(zp), owner, cr, ZFS_OWNER);
|
|
|
|
/*
|
|
* Map the bits required to the standard inode flags
|
|
* S_IRUSR|S_IWUSR|S_IXUSR in the needed_bits. Map the bits
|
|
* mapped by working_mode (currently missing) in missing_bits.
|
|
* Call secpolicy_vnode_access2() with (needed_bits & ~checkmode),
|
|
* needed_bits.
|
|
*/
|
|
needed_bits = 0;
|
|
|
|
working_mode = mode;
|
|
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))
|
|
needed_bits |= S_IRUSR;
|
|
if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
|
|
ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
|
|
needed_bits |= S_IWUSR;
|
|
if (working_mode & ACE_EXECUTE)
|
|
needed_bits |= S_IXUSR;
|
|
|
|
if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
|
|
&check_privs, skipaclchk, cr, mnt_ns)) == 0) {
|
|
if (is_attr)
|
|
zrele(xzp);
|
|
return (secpolicy_vnode_access2(cr, ZTOI(zp), owner,
|
|
needed_bits, needed_bits));
|
|
}
|
|
|
|
if (error && !check_privs) {
|
|
if (is_attr)
|
|
zrele(xzp);
|
|
return (error);
|
|
}
|
|
|
|
if (error && (flags & V_APPEND)) {
|
|
error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr,
|
|
mnt_ns);
|
|
}
|
|
|
|
if (error && check_privs) {
|
|
mode_t checkmode = 0;
|
|
|
|
/*
|
|
* 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 |= S_IRUSR;
|
|
if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
|
|
ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
|
|
checkmode |= S_IWUSR;
|
|
if (working_mode & ACE_EXECUTE)
|
|
checkmode |= S_IXUSR;
|
|
|
|
error = secpolicy_vnode_access2(cr, ZTOI(check_zp), owner,
|
|
needed_bits & ~checkmode, needed_bits);
|
|
|
|
if (error == 0 && (working_mode & ACE_WRITE_OWNER))
|
|
error = secpolicy_vnode_chown(cr, owner);
|
|
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, owner);
|
|
}
|
|
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 = SET_ERROR(EACCES);
|
|
}
|
|
}
|
|
} else if (error == 0) {
|
|
error = secpolicy_vnode_access2(cr, ZTOI(zp), owner,
|
|
needed_bits, needed_bits);
|
|
}
|
|
|
|
if (is_attr)
|
|
zrele(xzp);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Translate traditional unix S_IRUSR/S_IWUSR/S_IXUSR mode into
|
|
* NFSv4-style ZFS ACL format and call zfs_zaccess()
|
|
*/
|
|
int
|
|
zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr,
|
|
zuserns_t *mnt_ns)
|
|
{
|
|
return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr,
|
|
mnt_ns));
|
|
}
|
|
|
|
/*
|
|
* 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, NULL));
|
|
}
|
|
|
|
/* See zfs_zaccess_delete() */
|
|
static const boolean_t zfs_write_implies_delete_child = B_TRUE;
|
|
|
|
/*
|
|
* Determine whether delete access should be granted.
|
|
*
|
|
* The following chart outlines how we handle delete permissions which is
|
|
* how recent versions of windows (Windows 2008) handles it. The efficiency
|
|
* comes from not having to check the parent ACL where the object itself grants
|
|
* delete:
|
|
*
|
|
* -------------------------------------------------------
|
|
* | Parent Dir | Target Object Permissions |
|
|
* | permissions | |
|
|
* -------------------------------------------------------
|
|
* | | ACL Allows | ACL Denies| Delete |
|
|
* | | Delete | Delete | unspecified|
|
|
* -------------------------------------------------------
|
|
* | ACL Allows | Permit | Deny * | Permit |
|
|
* | DELETE_CHILD | | | |
|
|
* -------------------------------------------------------
|
|
* | ACL Denies | Permit | Deny | Deny |
|
|
* | DELETE_CHILD | | | |
|
|
* -------------------------------------------------------
|
|
* | ACL specifies | | | |
|
|
* | only allow | Permit | Deny * | Permit |
|
|
* | write and | | | |
|
|
* | execute | | | |
|
|
* -------------------------------------------------------
|
|
* | ACL denies | | | |
|
|
* | write and | Permit | Deny | Deny |
|
|
* | execute | | | |
|
|
* -------------------------------------------------------
|
|
* ^
|
|
* |
|
|
* Re. execute permission on the directory: if that's missing,
|
|
* the vnode lookup of the target will fail before we get here.
|
|
*
|
|
* Re [*] in the table above: NFSv4 would normally Permit delete for
|
|
* these two cells of the matrix.
|
|
* See acl.h for notes on which ACE_... flags should be checked for which
|
|
* operations. Specifically, the NFSv4 committee recommendation is in
|
|
* conflict with the Windows interpretation of DENY ACEs, where DENY ACEs
|
|
* should take precedence ahead of ALLOW ACEs.
|
|
*
|
|
* This implementation always consults the target object's ACL first.
|
|
* If a DENY ACE is present on the target object that specifies ACE_DELETE,
|
|
* delete access is denied. If an ALLOW ACE with ACE_DELETE is present on
|
|
* the target object, access is allowed. If and only if no entries with
|
|
* ACE_DELETE are present in the object's ACL, check the container's ACL
|
|
* for entries with ACE_DELETE_CHILD.
|
|
*
|
|
* A summary of the logic implemented from the table above is as follows:
|
|
*
|
|
* First check for DENY ACEs that apply.
|
|
* If either target or container has a deny, EACCES.
|
|
*
|
|
* Delete access can then be summarized as follows:
|
|
* 1: The object to be deleted grants ACE_DELETE, or
|
|
* 2: The containing directory grants ACE_DELETE_CHILD.
|
|
* In a Windows system, that would be the end of the story.
|
|
* In this system, (2) has some complications...
|
|
* 2a: "sticky" bit on a directory adds restrictions, and
|
|
* 2b: existing ACEs from previous versions of ZFS may
|
|
* not carry ACE_DELETE_CHILD where they should, so we
|
|
* also allow delete when ACE_WRITE_DATA is granted.
|
|
*
|
|
* Note: 2b is technically a work-around for a prior bug,
|
|
* which hopefully can go away some day. For those who
|
|
* no longer need the work around, and for testing, this
|
|
* work-around is made conditional via the tunable:
|
|
* zfs_write_implies_delete_child
|
|
*/
|
|
int
|
|
zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr, zuserns_t *mnt_ns)
|
|
{
|
|
uint32_t wanted_dirperms;
|
|
uint32_t dzp_working_mode = 0;
|
|
uint32_t zp_working_mode = 0;
|
|
int dzp_error, zp_error;
|
|
boolean_t dzpcheck_privs;
|
|
boolean_t zpcheck_privs;
|
|
|
|
if (zp->z_pflags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
|
|
return (SET_ERROR(EPERM));
|
|
|
|
/*
|
|
* Case 1:
|
|
* If target object grants ACE_DELETE then we are done. This is
|
|
* indicated by a return value of 0. For this case we don't worry
|
|
* about the sticky bit because sticky only applies to the parent
|
|
* directory and this is the child access result.
|
|
*
|
|
* If we encounter a DENY ACE here, we're also done (EACCES).
|
|
* Note that if we hit a DENY ACE here (on the target) it should
|
|
* take precedence over a DENY ACE on the container, so that when
|
|
* we have more complete auditing support we will be able to
|
|
* report an access failure against the specific target.
|
|
* (This is part of why we're checking the target first.)
|
|
*/
|
|
zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
|
|
&zpcheck_privs, B_FALSE, cr, mnt_ns);
|
|
if (zp_error == EACCES) {
|
|
/* We hit a DENY ACE. */
|
|
if (!zpcheck_privs)
|
|
return (SET_ERROR(zp_error));
|
|
return (secpolicy_vnode_remove(cr));
|
|
|
|
}
|
|
if (zp_error == 0)
|
|
return (0);
|
|
|
|
/*
|
|
* Case 2:
|
|
* If the containing directory grants ACE_DELETE_CHILD,
|
|
* or we're in backward compatibility mode and the
|
|
* containing directory has ACE_WRITE_DATA, allow.
|
|
* Case 2b is handled with wanted_dirperms.
|
|
*/
|
|
wanted_dirperms = ACE_DELETE_CHILD;
|
|
if (zfs_write_implies_delete_child)
|
|
wanted_dirperms |= ACE_WRITE_DATA;
|
|
dzp_error = zfs_zaccess_common(dzp, wanted_dirperms,
|
|
&dzp_working_mode, &dzpcheck_privs, B_FALSE, cr, mnt_ns);
|
|
if (dzp_error == EACCES) {
|
|
/* We hit a DENY ACE. */
|
|
if (!dzpcheck_privs)
|
|
return (SET_ERROR(dzp_error));
|
|
return (secpolicy_vnode_remove(cr));
|
|
}
|
|
|
|
/*
|
|
* Cases 2a, 2b (continued)
|
|
*
|
|
* Note: dzp_working_mode now contains any permissions
|
|
* that were NOT granted. Therefore, if any of the
|
|
* wanted_dirperms WERE granted, we will have:
|
|
* dzp_working_mode != wanted_dirperms
|
|
* We're really asking if ANY of those permissions
|
|
* were granted, and if so, grant delete access.
|
|
*/
|
|
if (dzp_working_mode != wanted_dirperms)
|
|
dzp_error = 0;
|
|
|
|
/*
|
|
* dzp_error is 0 if the container granted us permissions to "modify".
|
|
* If we do not have permission via one or more ACEs, our current
|
|
* privileges may still permit us to modify the container.
|
|
*
|
|
* dzpcheck_privs is false when i.e. the FS is read-only.
|
|
* Otherwise, do privilege checks for the container.
|
|
*/
|
|
if (dzp_error != 0 && dzpcheck_privs) {
|
|
uid_t owner;
|
|
|
|
/*
|
|
* The secpolicy call needs the requested access and
|
|
* the current access mode of the container, but it
|
|
* only knows about Unix-style modes (VEXEC, VWRITE),
|
|
* so this must condense the fine-grained ACE bits into
|
|
* Unix modes.
|
|
*
|
|
* The VEXEC flag is easy, because we know that has
|
|
* always been checked before we get here (during the
|
|
* lookup of the target vnode). The container has not
|
|
* granted us permissions to "modify", so we do not set
|
|
* the VWRITE flag in the current access mode.
|
|
*/
|
|
owner = zfs_fuid_map_id(ZTOZSB(dzp),
|
|
KUID_TO_SUID(ZTOI(dzp)->i_uid), cr, ZFS_OWNER);
|
|
dzp_error = secpolicy_vnode_access2(cr, ZTOI(dzp),
|
|
owner, S_IXUSR, S_IWUSR|S_IXUSR);
|
|
}
|
|
if (dzp_error != 0) {
|
|
/*
|
|
* Note: We may have dzp_error = -1 here (from
|
|
* zfs_zacess_common). Don't return that.
|
|
*/
|
|
return (SET_ERROR(EACCES));
|
|
}
|
|
|
|
|
|
/*
|
|
* At this point, we know that the directory permissions allow
|
|
* us to modify, but we still need to check for the additional
|
|
* restrictions that apply when the "sticky bit" is set.
|
|
*
|
|
* Yes, zfs_sticky_remove_access() also checks this bit, but
|
|
* checking it here and skipping the call below is nice when
|
|
* you're watching all of this with dtrace.
|
|
*/
|
|
if ((dzp->z_mode & S_ISVTX) == 0)
|
|
return (0);
|
|
|
|
/*
|
|
* zfs_sticky_remove_access will succeed if:
|
|
* 1. The sticky bit is absent.
|
|
* 2. We pass the sticky bit restrictions.
|
|
* 3. We have privileges that always allow file removal.
|
|
*/
|
|
return (zfs_sticky_remove_access(dzp, zp, cr));
|
|
}
|
|
|
|
int
|
|
zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
|
|
znode_t *tzp, cred_t *cr, zuserns_t *mnt_ns)
|
|
{
|
|
int add_perm;
|
|
int error;
|
|
|
|
if (szp->z_pflags & ZFS_AV_QUARANTINED)
|
|
return (SET_ERROR(EACCES));
|
|
|
|
add_perm = S_ISDIR(ZTOI(szp)->i_mode) ?
|
|
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, mnt_ns)))
|
|
return (error);
|
|
|
|
/*
|
|
* If we have a tzp, see if we can delete it?
|
|
*/
|
|
if (tzp) {
|
|
if ((error = zfs_zaccess_delete(tdzp, tzp, cr, mnt_ns)))
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Now check for add permissions
|
|
*/
|
|
error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr, mnt_ns);
|
|
|
|
return (error);
|
|
}
|