2 * Convert ZFS/NFSv4 acls to NT acls and vice versa.
4 * Copyright (C) Jiri Sasek, 2007
5 * based on the foobar.c module which is copyrighted by Volker Lendecke
7 * Many thanks to Axel Apitz for help to fix the special ace's handling
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
26 #include "smbd/smbd.h"
27 #include "nfs4_acls.h"
29 #if HAVE_FREEBSD_SUNACL_H
34 #define DBGC_CLASS DBGC_VFS
36 #define ZFSACL_MODULE_NAME "zfsacl"
39 * read the local file's acls and return it in NT form
40 * using the NFSv4 format conversion
42 static NTSTATUS zfs_get_nt_acl_common(const char *name,
51 /* read the number of file aces */
52 if((naces = acl(name, ACE_GETACLCNT, 0, NULL)) == -1) {
54 DEBUG(9, ("acl(ACE_GETACLCNT, %s): Operation is not "
55 "supported on the filesystem where the file "
58 DEBUG(9, ("acl(ACE_GETACLCNT, %s): %s ", name,
61 return map_nt_error_from_unix(errno);
63 /* allocate the field of ZFS aces */
64 mem_ctx = talloc_tos();
65 acebuf = (ace_t *) talloc_size(mem_ctx, sizeof(ace_t)*naces);
67 return NT_STATUS_NO_MEMORY;
69 /* read the aces into the field */
70 if(acl(name, ACE_GETACL, naces, acebuf) < 0) {
71 DEBUG(9, ("acl(ACE_GETACL, %s): %s ", name,
73 return map_nt_error_from_unix(errno);
75 /* create SMB4ACL data */
76 if((pacl = smb_create_smb4acl()) == NULL) {
77 return NT_STATUS_NO_MEMORY;
79 for(i=0; i<naces; i++) {
80 SMB_ACE4PROP_T aceprop;
82 aceprop.aceType = (uint32) acebuf[i].a_type;
83 aceprop.aceFlags = (uint32) acebuf[i].a_flags;
84 aceprop.aceMask = (uint32) acebuf[i].a_access_mask;
85 aceprop.who.id = (uint32) acebuf[i].a_who;
87 if(aceprop.aceFlags & ACE_OWNER) {
88 aceprop.flags = SMB_ACE4_ID_SPECIAL;
89 aceprop.who.special_id = SMB_ACE4_WHO_OWNER;
90 } else if(aceprop.aceFlags & ACE_GROUP) {
91 aceprop.flags = SMB_ACE4_ID_SPECIAL;
92 aceprop.who.special_id = SMB_ACE4_WHO_GROUP;
93 } else if(aceprop.aceFlags & ACE_EVERYONE) {
94 aceprop.flags = SMB_ACE4_ID_SPECIAL;
95 aceprop.who.special_id = SMB_ACE4_WHO_EVERYONE;
99 if(smb_add_ace4(pacl, &aceprop) == NULL)
100 return NT_STATUS_NO_MEMORY;
107 /* call-back function processing the NT acl -> ZFS acl using NFSv4 conv. */
108 static bool zfs_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
110 int naces = smb_get_naces(smbacl), i;
114 bool have_special_id = false;
116 /* allocate the field of ZFS aces */
117 mem_ctx = talloc_tos();
118 acebuf = (ace_t *) talloc_size(mem_ctx, sizeof(ace_t)*naces);
123 /* handle all aces */
124 for(smbace = smb_first_ace4(smbacl), i = 0;
126 smbace = smb_next_ace4(smbace), i++) {
127 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
129 acebuf[i].a_type = aceprop->aceType;
130 acebuf[i].a_flags = aceprop->aceFlags;
131 acebuf[i].a_access_mask = aceprop->aceMask;
132 /* SYNC on acls is a no-op on ZFS.
134 acebuf[i].a_access_mask &= ~SMB_ACE4_SYNCHRONIZE;
135 acebuf[i].a_who = aceprop->who.id;
136 if(aceprop->flags & SMB_ACE4_ID_SPECIAL) {
137 switch(aceprop->who.special_id) {
138 case SMB_ACE4_WHO_EVERYONE:
139 acebuf[i].a_flags |= ACE_EVERYONE;
141 case SMB_ACE4_WHO_OWNER:
142 acebuf[i].a_flags |= ACE_OWNER;
144 case SMB_ACE4_WHO_GROUP:
145 acebuf[i].a_flags |= ACE_GROUP;
148 DEBUG(8, ("unsupported special_id %d\n", \
149 aceprop->who.special_id));
150 continue; /* don't add it !!! */
152 have_special_id = true;
157 && lp_parm_bool(fsp->conn->params->service, "zfsacl",
158 "denymissingspecial", false)) {
163 SMB_ASSERT(i == naces);
166 if(acl(fsp->fsp_name->base_name, ACE_SETACL, naces, acebuf)) {
167 if(errno == ENOSYS) {
168 DEBUG(9, ("acl(ACE_SETACL, %s): Operation is not "
169 "supported on the filesystem where the file "
170 "reside", fsp_str_dbg(fsp)));
172 DEBUG(9, ("acl(ACE_SETACL, %s): %s ", fsp_str_dbg(fsp),
182 * set the local file's acls obtaining it in NT form
183 * using the NFSv4 format conversion
185 static NTSTATUS zfs_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
186 uint32 security_info_sent,
187 const struct security_descriptor *psd)
189 return smb_set_nt_acl_nfs4(fsp, security_info_sent, psd,
193 static NTSTATUS zfsacl_fget_nt_acl(struct vfs_handle_struct *handle,
194 struct files_struct *fsp,
195 uint32 security_info,
196 struct security_descriptor **ppdesc)
201 status = zfs_get_nt_acl_common(fsp->fsp_name->base_name, security_info,
203 if (!NT_STATUS_IS_OK(status)) {
207 return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc, pacl);
210 static NTSTATUS zfsacl_get_nt_acl(struct vfs_handle_struct *handle,
211 const char *name, uint32 security_info,
212 struct security_descriptor **ppdesc)
217 status = zfs_get_nt_acl_common(name, security_info, &pacl);
218 if (!NT_STATUS_IS_OK(status)) {
222 return smb_get_nt_acl_nfs4(handle->conn, name, security_info, ppdesc,
226 static NTSTATUS zfsacl_fset_nt_acl(vfs_handle_struct *handle,
228 uint32 security_info_sent,
229 const struct security_descriptor *psd)
231 return zfs_set_nt_acl(handle, fsp, security_info_sent, psd);
234 /* nils.goroll@hamburg.de 2008-06-16 :
237 - https://bugzilla.samba.org/show_bug.cgi?id=5446
238 - http://bugs.opensolaris.org/view_bug.do?bug_id=6688240
240 Solaris supports NFSv4 and ZFS ACLs through a common system call, acl(2)
241 with ACE_SETACL / ACE_GETACL / ACE_GETACLCNT, which is being wrapped for
242 use by samba in this module.
244 As the acl(2) interface is identical for ZFS and for NFS, this module,
245 vfs_zfsacl, can not only be used for ZFS, but also for sharing NFSv4
248 But while "traditional" POSIX DRAFT ACLs (using acl(2) with SETACL
249 / GETACL / GETACLCNT) fail for ZFS, the Solaris NFS client
250 implemets a compatibility wrapper, which will make calls to
251 traditional ACL calls though vfs_solarisacl succeed. As the
252 compatibility wrapper's implementation is (by design) incomplete,
253 we want to make sure that it is never being called.
255 As long as Samba does not support an exiplicit method for a module
256 to define conflicting vfs methods, we should override all conflicting
259 For this to work, we need to make sure that this module is initialised
260 *after* vfs_solarisacl
262 Function declarations taken from vfs_solarisacl
265 static SMB_ACL_T zfsacl_fail__sys_acl_get_file(vfs_handle_struct *handle,
269 return (SMB_ACL_T)NULL;
272 static SMB_ACL_T zfsacl_fail__sys_acl_get_fd(vfs_handle_struct *handle,
275 return (SMB_ACL_T)NULL;
278 static int zfsacl_fail__sys_acl_set_file(vfs_handle_struct *handle,
286 static int zfsacl_fail__sys_acl_set_fd(vfs_handle_struct *handle,
293 static int zfsacl_fail__sys_acl_delete_def_file(vfs_handle_struct *handle,
299 /* VFS operations structure */
301 static struct vfs_fn_pointers zfsacl_fns = {
302 .sys_acl_get_file = zfsacl_fail__sys_acl_get_file,
303 .sys_acl_get_fd = zfsacl_fail__sys_acl_get_fd,
304 .sys_acl_set_file = zfsacl_fail__sys_acl_set_file,
305 .sys_acl_set_fd = zfsacl_fail__sys_acl_set_fd,
306 .sys_acl_delete_def_file = zfsacl_fail__sys_acl_delete_def_file,
307 .fget_nt_acl = zfsacl_fget_nt_acl,
308 .get_nt_acl = zfsacl_get_nt_acl,
309 .fset_nt_acl = zfsacl_fset_nt_acl,
312 NTSTATUS vfs_zfsacl_init(void);
313 NTSTATUS vfs_zfsacl_init(void)
315 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "zfsacl",