2 Unix SMB/Netbios implementation.
3 VFS module to get and set posix acls
4 Copyright (C) Volker Lendecke 2006
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "system/filesys.h"
22 #include "smbd/smbd.h"
23 #include "modules/vfs_posixacl.h"
25 /* prototypes for static functions first - for clarity */
27 static bool smb_ace_to_internal(acl_entry_t posix_ace,
28 struct smb_acl_entry *ace);
29 static struct smb_acl_t *smb_acl_to_internal(acl_t acl, TALLOC_CTX *mem_ctx);
30 static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm);
31 static acl_t smb_acl_to_posix(const struct smb_acl_t *acl);
34 /* public functions - the api */
36 SMB_ACL_T posixacl_sys_acl_get_file(vfs_handle_struct *handle,
37 const struct smb_filename *smb_fname,
41 struct smb_acl_t *result;
46 case SMB_ACL_TYPE_ACCESS:
47 acl_type = ACL_TYPE_ACCESS;
49 case SMB_ACL_TYPE_DEFAULT:
50 acl_type = ACL_TYPE_DEFAULT;
57 acl = acl_get_file(smb_fname->base_name, acl_type);
63 result = smb_acl_to_internal(acl, mem_ctx);
68 SMB_ACL_T posixacl_sys_acl_get_fd(vfs_handle_struct *handle,
69 files_struct *fsp, TALLOC_CTX *mem_ctx)
71 struct smb_acl_t *result;
72 acl_t acl = acl_get_fd(fsp->fh->fd);
78 result = smb_acl_to_internal(acl, mem_ctx);
83 int posixacl_sys_acl_set_file(vfs_handle_struct *handle,
84 const struct smb_filename *smb_fname,
92 DEBUG(10, ("Calling acl_set_file: %s, %d\n",
97 case SMB_ACL_TYPE_ACCESS:
98 acl_type = ACL_TYPE_ACCESS;
100 case SMB_ACL_TYPE_DEFAULT:
101 acl_type = ACL_TYPE_DEFAULT;
108 if ((acl = smb_acl_to_posix(theacl)) == NULL) {
111 res = acl_set_file(smb_fname->base_name, acl_type, acl);
113 DEBUG(10, ("acl_set_file failed: %s\n", strerror(errno)));
119 int posixacl_sys_acl_set_fd(vfs_handle_struct *handle,
124 acl_t acl = smb_acl_to_posix(theacl);
128 res = acl_set_fd(fsp->fh->fd, acl);
133 int posixacl_sys_acl_delete_def_file(vfs_handle_struct *handle,
134 const struct smb_filename *smb_fname)
136 return acl_delete_def_file(smb_fname->base_name);
140 /* private functions */
142 static bool smb_ace_to_internal(acl_entry_t posix_ace,
143 struct smb_acl_entry *ace)
146 acl_permset_t permset;
148 if (acl_get_tag_type(posix_ace, &tag) != 0) {
149 DEBUG(0, ("smb_acl_get_tag_type failed\n"));
155 ace->a_type = SMB_ACL_USER;
158 ace->a_type = SMB_ACL_USER_OBJ;
161 ace->a_type = SMB_ACL_GROUP;
164 ace->a_type = SMB_ACL_GROUP_OBJ;
167 ace->a_type = SMB_ACL_OTHER;
170 ace->a_type = SMB_ACL_MASK;
172 #ifdef HAVE_ACL_EVERYONE
174 DEBUG(1, ("ACL tag type ACL_EVERYONE. FreeBSD with ZFS? Use 'vfs objects = zfsacl'\n"));
178 DEBUG(0, ("unknown tag type %d\n", (unsigned int)tag));
181 switch(ace->a_type) {
183 uid_t *puid = (uid_t *)acl_get_qualifier(posix_ace);
185 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
188 ace->info.user.uid = *puid;
193 case SMB_ACL_GROUP: {
194 gid_t *pgid = (uid_t *)acl_get_qualifier(posix_ace);
196 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
199 ace->info.group.gid = *pgid;
206 if (acl_get_permset(posix_ace, &permset) != 0) {
207 DEBUG(0, ("smb_acl_get_mode failed\n"));
211 #ifdef HAVE_ACL_GET_PERM_NP
212 ace->a_perm |= (acl_get_perm_np(permset, ACL_READ) ? SMB_ACL_READ : 0);
213 ace->a_perm |= (acl_get_perm_np(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
214 ace->a_perm |= (acl_get_perm_np(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
216 ace->a_perm |= (acl_get_perm(permset, ACL_READ) ? SMB_ACL_READ : 0);
217 ace->a_perm |= (acl_get_perm(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
218 ace->a_perm |= (acl_get_perm(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
223 static struct smb_acl_t *smb_acl_to_internal(acl_t acl, TALLOC_CTX *mem_ctx)
225 struct smb_acl_t *result = sys_acl_init(mem_ctx);
226 int entry_id = ACL_FIRST_ENTRY;
228 if (result == NULL) {
231 while (acl_get_entry(acl, entry_id, &e) == 1) {
233 entry_id = ACL_NEXT_ENTRY;
235 result->acl = talloc_realloc(result, result->acl,
236 struct smb_acl_entry, result->count+1);
237 if (result->acl == NULL) {
239 DEBUG(0, ("talloc_realloc failed\n"));
244 if (!smb_ace_to_internal(e, &result->acl[result->count])) {
254 static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm)
257 acl_permset_t permset;
259 if ((ret = acl_get_permset(entry, &permset)) != 0) {
262 if ((ret = acl_clear_perms(permset)) != 0) {
265 if ((perm & SMB_ACL_READ) &&
266 ((ret = acl_add_perm(permset, ACL_READ)) != 0)) {
269 if ((perm & SMB_ACL_WRITE) &&
270 ((ret = acl_add_perm(permset, ACL_WRITE)) != 0)) {
273 if ((perm & SMB_ACL_EXECUTE) &&
274 ((ret = acl_add_perm(permset, ACL_EXECUTE)) != 0)) {
277 return acl_set_permset(entry, permset);
280 static acl_t smb_acl_to_posix(const struct smb_acl_t *acl)
285 result = acl_init(acl->count);
286 if (result == NULL) {
287 DEBUG(10, ("acl_init failed\n"));
291 for (i=0; i<acl->count; i++) {
292 const struct smb_acl_entry *entry = &acl->acl[i];
296 if (acl_create_entry(&result, &e) != 0) {
297 DEBUG(1, ("acl_create_entry failed: %s\n",
302 switch (entry->a_type) {
306 case SMB_ACL_USER_OBJ:
312 case SMB_ACL_GROUP_OBJ:
322 DEBUG(1, ("Unknown tag value %d\n", entry->a_type));
326 if (acl_set_tag_type(e, tag) != 0) {
327 DEBUG(10, ("acl_set_tag_type(%d) failed: %s\n",
328 tag, strerror(errno)));
332 switch (entry->a_type) {
334 if (acl_set_qualifier(e, &entry->info.user.uid) != 0) {
335 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
341 if (acl_set_qualifier(e, &entry->info.group.gid) != 0) {
342 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
347 default: /* Shut up, compiler! :-) */
351 if (smb_acl_set_mode(e, entry->a_perm) != 0) {
356 if (acl_valid(result) != 0) {
357 char *acl_string = sys_acl_to_text(acl, NULL);
358 DEBUG(0, ("smb_acl_to_posix: ACL %s is invalid for set (%s)\n",
359 acl_string, strerror(errno)));
360 SAFE_FREE(acl_string);
367 if (result != NULL) {
373 /* VFS operations structure */
375 static struct vfs_fn_pointers posixacl_fns = {
376 .sys_acl_get_file_fn = posixacl_sys_acl_get_file,
377 .sys_acl_get_fd_fn = posixacl_sys_acl_get_fd,
378 .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
379 .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
380 .sys_acl_set_file_fn = posixacl_sys_acl_set_file,
381 .sys_acl_set_fd_fn = posixacl_sys_acl_set_fd,
382 .sys_acl_delete_def_file_fn = posixacl_sys_acl_delete_def_file,
386 NTSTATUS vfs_posixacl_init(TALLOC_CTX *ctx)
388 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "posixacl",