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/*-
* Copyright (c) 2008, 2009 Edward Tomasz Napierała <trasz@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: releng/10.3/sys/cddl/compat/opensolaris/kern/opensolaris_acl.c 290893 2015-11-15 23:54:34Z ngie $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <sys/zfs_acl.h>
#include <sys/acl.h>
struct zfs2bsd {
uint32_t zb_zfs;
int zb_bsd;
};
struct zfs2bsd perms[] = {{ACE_READ_DATA, ACL_READ_DATA},
{ACE_WRITE_DATA, ACL_WRITE_DATA},
{ACE_EXECUTE, ACL_EXECUTE},
{ACE_APPEND_DATA, ACL_APPEND_DATA},
{ACE_DELETE_CHILD, ACL_DELETE_CHILD},
{ACE_DELETE, ACL_DELETE},
{ACE_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES},
{ACE_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES},
{ACE_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS},
{ACE_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS},
{ACE_READ_ACL, ACL_READ_ACL},
{ACE_WRITE_ACL, ACL_WRITE_ACL},
{ACE_WRITE_OWNER, ACL_WRITE_OWNER},
{ACE_SYNCHRONIZE, ACL_SYNCHRONIZE},
{0, 0}};
struct zfs2bsd flags[] = {{ACE_FILE_INHERIT_ACE,
ACL_ENTRY_FILE_INHERIT},
{ACE_DIRECTORY_INHERIT_ACE,
ACL_ENTRY_DIRECTORY_INHERIT},
{ACE_NO_PROPAGATE_INHERIT_ACE,
ACL_ENTRY_NO_PROPAGATE_INHERIT},
{ACE_INHERIT_ONLY_ACE,
ACL_ENTRY_INHERIT_ONLY},
{ACE_INHERITED_ACE,
ACL_ENTRY_INHERITED},
{ACE_SUCCESSFUL_ACCESS_ACE_FLAG,
ACL_ENTRY_SUCCESSFUL_ACCESS},
{ACE_FAILED_ACCESS_ACE_FLAG,
ACL_ENTRY_FAILED_ACCESS},
{0, 0}};
static int
_bsd_from_zfs(uint32_t zfs, const struct zfs2bsd *table)
{
const struct zfs2bsd *tmp;
int bsd = 0;
for (tmp = table; tmp->zb_zfs != 0; tmp++) {
if (zfs & tmp->zb_zfs)
bsd |= tmp->zb_bsd;
}
return (bsd);
}
static uint32_t
_zfs_from_bsd(int bsd, const struct zfs2bsd *table)
{
const struct zfs2bsd *tmp;
uint32_t zfs = 0;
for (tmp = table; tmp->zb_bsd != 0; tmp++) {
if (bsd & tmp->zb_bsd)
zfs |= tmp->zb_zfs;
}
return (zfs);
}
int
acl_from_aces(struct acl *aclp, const ace_t *aces, int nentries)
{
int i;
struct acl_entry *entry;
const ace_t *ace;
if (nentries < 1) {
printf("acl_from_aces: empty ZFS ACL; returning EINVAL.\n");
return (EINVAL);
}
if (nentries > ACL_MAX_ENTRIES) {
/*
* I believe it may happen only when moving a pool
* from SunOS to FreeBSD.
*/
printf("acl_from_aces: ZFS ACL too big to fit "
"into 'struct acl'; returning EINVAL.\n");
return (EINVAL);
}
bzero(aclp, sizeof(*aclp));
aclp->acl_maxcnt = ACL_MAX_ENTRIES;
aclp->acl_cnt = nentries;
for (i = 0; i < nentries; i++) {
entry = &(aclp->acl_entry[i]);
ace = &(aces[i]);
if (ace->a_flags & ACE_OWNER)
entry->ae_tag = ACL_USER_OBJ;
else if (ace->a_flags & ACE_GROUP)
entry->ae_tag = ACL_GROUP_OBJ;
else if (ace->a_flags & ACE_EVERYONE)
entry->ae_tag = ACL_EVERYONE;
else if (ace->a_flags & ACE_IDENTIFIER_GROUP)
entry->ae_tag = ACL_GROUP;
else
entry->ae_tag = ACL_USER;
if (entry->ae_tag == ACL_USER || entry->ae_tag == ACL_GROUP)
entry->ae_id = ace->a_who;
else
entry->ae_id = ACL_UNDEFINED_ID;
entry->ae_perm = _bsd_from_zfs(ace->a_access_mask, perms);
entry->ae_flags = _bsd_from_zfs(ace->a_flags, flags);
switch (ace->a_type) {
case ACE_ACCESS_ALLOWED_ACE_TYPE:
entry->ae_entry_type = ACL_ENTRY_TYPE_ALLOW;
break;
case ACE_ACCESS_DENIED_ACE_TYPE:
entry->ae_entry_type = ACL_ENTRY_TYPE_DENY;
break;
case ACE_SYSTEM_AUDIT_ACE_TYPE:
entry->ae_entry_type = ACL_ENTRY_TYPE_AUDIT;
break;
case ACE_SYSTEM_ALARM_ACE_TYPE:
entry->ae_entry_type = ACL_ENTRY_TYPE_ALARM;
break;
default:
panic("acl_from_aces: a_type is 0x%x", ace->a_type);
}
}
return (0);
}
void
aces_from_acl(ace_t *aces, int *nentries, const struct acl *aclp)
{
int i;
const struct acl_entry *entry;
ace_t *ace;
bzero(aces, sizeof(*aces) * aclp->acl_cnt);
*nentries = aclp->acl_cnt;
for (i = 0; i < aclp->acl_cnt; i++) {
entry = &(aclp->acl_entry[i]);
ace = &(aces[i]);
ace->a_who = entry->ae_id;
if (entry->ae_tag == ACL_USER_OBJ)
ace->a_flags = ACE_OWNER;
else if (entry->ae_tag == ACL_GROUP_OBJ)
ace->a_flags = (ACE_GROUP | ACE_IDENTIFIER_GROUP);
else if (entry->ae_tag == ACL_GROUP)
ace->a_flags = ACE_IDENTIFIER_GROUP;
else if (entry->ae_tag == ACL_EVERYONE)
ace->a_flags = ACE_EVERYONE;
else /* ACL_USER */
ace->a_flags = 0;
ace->a_access_mask = _zfs_from_bsd(entry->ae_perm, perms);
ace->a_flags |= _zfs_from_bsd(entry->ae_flags, flags);
switch (entry->ae_entry_type) {
case ACL_ENTRY_TYPE_ALLOW:
ace->a_type = ACE_ACCESS_ALLOWED_ACE_TYPE;
break;
case ACL_ENTRY_TYPE_DENY:
ace->a_type = ACE_ACCESS_DENIED_ACE_TYPE;
break;
case ACL_ENTRY_TYPE_ALARM:
ace->a_type = ACE_SYSTEM_ALARM_ACE_TYPE;
break;
case ACL_ENTRY_TYPE_AUDIT:
ace->a_type = ACE_SYSTEM_AUDIT_ACE_TYPE;
break;
default:
panic("aces_from_acl: ae_entry_type is 0x%x", entry->ae_entry_type);
}
}
}
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