mirror of
https://github.com/samba-team/samba.git
synced 2024-12-23 17:34:34 +03:00
afbfbd7f4c
Michael
316 lines
8.8 KiB
C
316 lines
8.8 KiB
C
/*
|
|
* Convert ZFS/NFSv4 acls to NT acls and vice versa.
|
|
*
|
|
* Copyright (C) Jiri Sasek, 2007
|
|
* based on the foobar.c module which is copyrighted by Volker Lendecke
|
|
*
|
|
* Many thanks to Axel Apitz for help to fix the special ace's handling
|
|
* issues.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include "includes.h"
|
|
#include "nfs4_acls.h"
|
|
|
|
#undef DBGC_CLASS
|
|
#define DBGC_CLASS DBGC_VFS
|
|
|
|
#define ZFSACL_MODULE_NAME "zfsacl"
|
|
|
|
/* zfs_get_nt_acl()
|
|
* read the local file's acls and return it in NT form
|
|
* using the NFSv4 format conversion
|
|
*/
|
|
static NTSTATUS zfs_get_nt_acl_common(const char *name,
|
|
uint32 security_info,
|
|
SMB4ACL_T **ppacl)
|
|
{
|
|
int naces, i;
|
|
ace_t *acebuf;
|
|
SMB4ACL_T *pacl;
|
|
TALLOC_CTX *mem_ctx;
|
|
|
|
/* read the number of file aces */
|
|
if((naces = acl(name, ACE_GETACLCNT, 0, NULL)) == -1) {
|
|
if(errno == ENOSYS) {
|
|
DEBUG(9, ("acl(ACE_GETACLCNT, %s): Operation is not "
|
|
"supported on the filesystem where the file "
|
|
"reside", name));
|
|
} else {
|
|
DEBUG(9, ("acl(ACE_GETACLCNT, %s): %s ", name,
|
|
strerror(errno)));
|
|
}
|
|
return map_nt_error_from_unix(errno);
|
|
}
|
|
/* allocate the field of ZFS aces */
|
|
mem_ctx = talloc_tos();
|
|
acebuf = (ace_t *) talloc_size(mem_ctx, sizeof(ace_t)*naces);
|
|
if(acebuf == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
/* read the aces into the field */
|
|
if(acl(name, ACE_GETACL, naces, acebuf) < 0) {
|
|
DEBUG(9, ("acl(ACE_GETACL, %s): %s ", name,
|
|
strerror(errno)));
|
|
return map_nt_error_from_unix(errno);
|
|
}
|
|
/* create SMB4ACL data */
|
|
if((pacl = smb_create_smb4acl()) == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
for(i=0; i<naces; i++) {
|
|
SMB_ACE4PROP_T aceprop;
|
|
|
|
aceprop.aceType = (uint32) acebuf[i].a_type;
|
|
aceprop.aceFlags = (uint32) acebuf[i].a_flags;
|
|
aceprop.aceMask = (uint32) acebuf[i].a_access_mask;
|
|
aceprop.who.id = (uint32) acebuf[i].a_who;
|
|
|
|
if(aceprop.aceFlags & ACE_OWNER) {
|
|
aceprop.flags = SMB_ACE4_ID_SPECIAL;
|
|
aceprop.who.special_id = SMB_ACE4_WHO_OWNER;
|
|
} else if(aceprop.aceFlags & ACE_GROUP) {
|
|
aceprop.flags = SMB_ACE4_ID_SPECIAL;
|
|
aceprop.who.special_id = SMB_ACE4_WHO_GROUP;
|
|
} else if(aceprop.aceFlags & ACE_EVERYONE) {
|
|
aceprop.flags = SMB_ACE4_ID_SPECIAL;
|
|
aceprop.who.special_id = SMB_ACE4_WHO_EVERYONE;
|
|
} else {
|
|
aceprop.flags = 0;
|
|
}
|
|
if(smb_add_ace4(pacl, &aceprop) == NULL)
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
*ppacl = pacl;
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/* call-back function processing the NT acl -> ZFS acl using NFSv4 conv. */
|
|
static bool zfs_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
|
|
{
|
|
int naces = smb_get_naces(smbacl), i;
|
|
ace_t *acebuf;
|
|
SMB4ACE_T *smbace;
|
|
TALLOC_CTX *mem_ctx;
|
|
|
|
/* allocate the field of ZFS aces */
|
|
mem_ctx = talloc_tos();
|
|
acebuf = (ace_t *) talloc_size(mem_ctx, sizeof(ace_t)*naces);
|
|
if(acebuf == NULL) {
|
|
errno = ENOMEM;
|
|
return False;
|
|
}
|
|
/* handle all aces */
|
|
for(smbace = smb_first_ace4(smbacl), i = 0;
|
|
smbace!=NULL;
|
|
smbace = smb_next_ace4(smbace), i++) {
|
|
SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
|
|
|
|
acebuf[i].a_type = aceprop->aceType;
|
|
acebuf[i].a_flags = aceprop->aceFlags;
|
|
acebuf[i].a_access_mask = aceprop->aceMask;
|
|
acebuf[i].a_who = aceprop->who.id;
|
|
if(aceprop->flags & SMB_ACE4_ID_SPECIAL) {
|
|
switch(aceprop->who.special_id) {
|
|
case SMB_ACE4_WHO_EVERYONE:
|
|
acebuf[i].a_flags |= ACE_EVERYONE;
|
|
break;
|
|
case SMB_ACE4_WHO_OWNER:
|
|
acebuf[i].a_flags |= ACE_OWNER;
|
|
break;
|
|
case SMB_ACE4_WHO_GROUP:
|
|
acebuf[i].a_flags |= ACE_GROUP;
|
|
break;
|
|
default:
|
|
DEBUG(8, ("unsupported special_id %d\n", \
|
|
aceprop->who.special_id));
|
|
continue; /* don't add it !!! */
|
|
}
|
|
}
|
|
}
|
|
SMB_ASSERT(i == naces);
|
|
|
|
/* store acl */
|
|
if(acl(fsp->fsp_name, ACE_SETACL, naces, acebuf)) {
|
|
if(errno == ENOSYS) {
|
|
DEBUG(9, ("acl(ACE_SETACL, %s): Operation is not "
|
|
"supported on the filesystem where the file "
|
|
"reside", fsp->fsp_name));
|
|
} else {
|
|
DEBUG(9, ("acl(ACE_SETACL, %s): %s ", fsp->fsp_name,
|
|
strerror(errno)));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
return True;
|
|
}
|
|
|
|
/* zfs_set_nt_acl()
|
|
* set the local file's acls obtaining it in NT form
|
|
* using the NFSv4 format conversion
|
|
*/
|
|
static NTSTATUS zfs_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
|
|
uint32 security_info_sent,
|
|
const struct security_descriptor *psd)
|
|
{
|
|
return smb_set_nt_acl_nfs4(fsp, security_info_sent, psd,
|
|
zfs_process_smbacl);
|
|
}
|
|
|
|
static NTSTATUS zfsacl_fget_nt_acl(struct vfs_handle_struct *handle,
|
|
struct files_struct *fsp,
|
|
uint32 security_info,
|
|
struct security_descriptor **ppdesc)
|
|
{
|
|
SMB4ACL_T *pacl;
|
|
NTSTATUS status;
|
|
|
|
status = zfs_get_nt_acl_common(fsp->fsp_name, security_info, &pacl);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc, pacl);
|
|
}
|
|
|
|
static NTSTATUS zfsacl_get_nt_acl(struct vfs_handle_struct *handle,
|
|
const char *name, uint32 security_info,
|
|
struct security_descriptor **ppdesc)
|
|
{
|
|
SMB4ACL_T *pacl;
|
|
NTSTATUS status;
|
|
|
|
status = zfs_get_nt_acl_common(name, security_info, &pacl);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
return smb_get_nt_acl_nfs4(handle->conn, name, security_info, ppdesc,
|
|
pacl);
|
|
}
|
|
|
|
static NTSTATUS zfsacl_fset_nt_acl(vfs_handle_struct *handle,
|
|
files_struct *fsp,
|
|
uint32 security_info_sent,
|
|
const SEC_DESC *psd)
|
|
{
|
|
return zfs_set_nt_acl(handle, fsp, security_info_sent, psd);
|
|
}
|
|
|
|
/* nils.goroll@hamburg.de 2008-06-16 :
|
|
|
|
See also
|
|
- https://bugzilla.samba.org/show_bug.cgi?id=5446
|
|
- http://bugs.opensolaris.org/view_bug.do?bug_id=6688240
|
|
|
|
Solaris supports NFSv4 and ZFS ACLs through a common system call, acl(2)
|
|
with ACE_SETACL / ACE_GETACL / ACE_GETACLCNT, which is being wrapped for
|
|
use by samba in this module.
|
|
|
|
As the acl(2) interface is identical for ZFS and for NFS, this module,
|
|
vfs_zfsacl, can not only be used for ZFS, but also for sharing NFSv4
|
|
mounts on Solaris.
|
|
|
|
But while "traditional" POSIX DRAFT ACLs (using acl(2) with SETACL
|
|
/ GETACL / GETACLCNT) fail for ZFS, the Solaris NFS client
|
|
implemets a compatibility wrapper, which will make calls to
|
|
traditional ACL calls though vfs_solarisacl succeed. As the
|
|
compatibility wrapper's implementation is (by design) incomplete,
|
|
we want to make sure that it is never being called.
|
|
|
|
As long as Samba does not support an exiplicit method for a module
|
|
to define conflicting vfs methods, we should override all conflicting
|
|
methods here.
|
|
|
|
For this to work, we need to make sure that this module is initialised
|
|
*after* vfs_solarisacl
|
|
|
|
Function declarations taken from vfs_solarisacl
|
|
*/
|
|
|
|
SMB_ACL_T zfsacl_fail__sys_acl_get_file(vfs_handle_struct *handle,
|
|
const char *path_p,
|
|
SMB_ACL_TYPE_T type)
|
|
{
|
|
return (SMB_ACL_T)NULL;
|
|
}
|
|
SMB_ACL_T zfsacl_fail__sys_acl_get_fd(vfs_handle_struct *handle,
|
|
files_struct *fsp,
|
|
int fd)
|
|
{
|
|
return (SMB_ACL_T)NULL;
|
|
}
|
|
|
|
int zfsacl_fail__sys_acl_set_file(vfs_handle_struct *handle,
|
|
const char *name,
|
|
SMB_ACL_TYPE_T type,
|
|
SMB_ACL_T theacl)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
int zfsacl_fail__sys_acl_set_fd(vfs_handle_struct *handle,
|
|
files_struct *fsp,
|
|
int fd, SMB_ACL_T theacl)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
int zfsacl_fail__sys_acl_delete_def_file(vfs_handle_struct *handle,
|
|
const char *path)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
/* VFS operations structure */
|
|
|
|
static vfs_op_tuple zfsacl_ops[] = {
|
|
/* invalidate conflicting VFS methods */
|
|
{SMB_VFS_OP(zfsacl_fail__sys_acl_get_file),
|
|
SMB_VFS_OP_SYS_ACL_GET_FILE,
|
|
SMB_VFS_LAYER_OPAQUE},
|
|
{SMB_VFS_OP(zfsacl_fail__sys_acl_get_fd),
|
|
SMB_VFS_OP_SYS_ACL_GET_FD,
|
|
SMB_VFS_LAYER_OPAQUE},
|
|
{SMB_VFS_OP(zfsacl_fail__sys_acl_set_file),
|
|
SMB_VFS_OP_SYS_ACL_SET_FILE,
|
|
SMB_VFS_LAYER_OPAQUE},
|
|
{SMB_VFS_OP(zfsacl_fail__sys_acl_set_fd),
|
|
SMB_VFS_OP_SYS_ACL_SET_FD,
|
|
SMB_VFS_LAYER_OPAQUE},
|
|
{SMB_VFS_OP(zfsacl_fail__sys_acl_delete_def_file),
|
|
SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
|
|
SMB_VFS_LAYER_OPAQUE},
|
|
|
|
/* actual methods */
|
|
{SMB_VFS_OP(zfsacl_fget_nt_acl), SMB_VFS_OP_FGET_NT_ACL,
|
|
SMB_VFS_LAYER_OPAQUE},
|
|
{SMB_VFS_OP(zfsacl_get_nt_acl), SMB_VFS_OP_GET_NT_ACL,
|
|
SMB_VFS_LAYER_OPAQUE},
|
|
{SMB_VFS_OP(zfsacl_fset_nt_acl), SMB_VFS_OP_FSET_NT_ACL,
|
|
SMB_VFS_LAYER_OPAQUE},
|
|
{SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
|
|
};
|
|
|
|
NTSTATUS vfs_zfsacl_init(void);
|
|
NTSTATUS vfs_zfsacl_init(void)
|
|
{
|
|
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "zfsacl",
|
|
zfsacl_ops);
|
|
}
|