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_fd(vfs_handle_struct *handle,
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;
56 if (!fsp->fsp_flags.is_pathref && (acl_type == ACL_TYPE_ACCESS)) {
57 /* POSIX API only allows ACL_TYPE_ACCESS fetched on fd. */
58 acl = acl_get_fd(fsp_get_io_fd(fsp));
59 } else if (fsp->fsp_flags.have_proc_fds) {
60 int fd = fsp_get_pathref_fd(fsp);
61 const char *proc_fd_path = NULL;
64 proc_fd_path = sys_proc_fd_path(fd, buf, sizeof(buf));
65 if (proc_fd_path == NULL) {
69 acl = acl_get_file(proc_fd_path, acl_type);
72 * This is no longer a handle based call.
74 acl = acl_get_file(fsp->fsp_name->base_name, acl_type);
80 result = smb_acl_to_internal(acl, mem_ctx);
85 int posixacl_sys_acl_set_fd(vfs_handle_struct *handle,
91 acl_t acl = smb_acl_to_posix(theacl);
93 int fd = fsp_get_pathref_fd(fsp);
100 case SMB_ACL_TYPE_ACCESS:
101 acl_type = ACL_TYPE_ACCESS;
103 case SMB_ACL_TYPE_DEFAULT:
104 acl_type = ACL_TYPE_DEFAULT;
112 if (!fsp->fsp_flags.is_pathref && type == SMB_ACL_TYPE_ACCESS) {
113 res = acl_set_fd(fd, acl);
114 } else if (fsp->fsp_flags.have_proc_fds) {
115 const char *proc_fd_path = NULL;
118 proc_fd_path = sys_proc_fd_path(fd, buf, sizeof(buf));
119 if (proc_fd_path == NULL) {
123 res = acl_set_file(proc_fd_path, acl_type, acl);
126 * This is no longer a handle based call.
128 res = acl_set_file(fsp->fsp_name->base_name,
137 int posixacl_sys_acl_delete_def_fd(vfs_handle_struct *handle,
140 if (fsp->fsp_flags.have_proc_fds) {
141 int fd = fsp_get_pathref_fd(fsp);
142 const char *proc_fd_path = NULL;
145 proc_fd_path = sys_proc_fd_path(fd, buf, sizeof(buf));
146 if (proc_fd_path == NULL) {
149 return acl_delete_def_file(proc_fd_path);
153 * This is no longer a handle based call.
155 return acl_delete_def_file(fsp->fsp_name->base_name);
158 /* private functions */
160 static bool smb_ace_to_internal(acl_entry_t posix_ace,
161 struct smb_acl_entry *ace)
164 acl_permset_t permset;
166 if (acl_get_tag_type(posix_ace, &tag) != 0) {
167 DEBUG(0, ("smb_acl_get_tag_type failed\n"));
173 ace->a_type = SMB_ACL_USER;
176 ace->a_type = SMB_ACL_USER_OBJ;
179 ace->a_type = SMB_ACL_GROUP;
182 ace->a_type = SMB_ACL_GROUP_OBJ;
185 ace->a_type = SMB_ACL_OTHER;
188 ace->a_type = SMB_ACL_MASK;
190 #ifdef HAVE_ACL_EVERYONE
192 DEBUG(1, ("ACL tag type ACL_EVERYONE. FreeBSD with ZFS? Use 'vfs objects = zfsacl'\n"));
196 DEBUG(0, ("unknown tag type %d\n", (unsigned int)tag));
199 switch(ace->a_type) {
201 uid_t *puid = (uid_t *)acl_get_qualifier(posix_ace);
203 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
206 ace->info.user.uid = *puid;
211 case SMB_ACL_GROUP: {
212 gid_t *pgid = (uid_t *)acl_get_qualifier(posix_ace);
214 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
217 ace->info.group.gid = *pgid;
224 if (acl_get_permset(posix_ace, &permset) != 0) {
225 DEBUG(0, ("smb_acl_get_mode failed\n"));
229 #ifdef HAVE_ACL_GET_PERM_NP
230 ace->a_perm |= (acl_get_perm_np(permset, ACL_READ) ? SMB_ACL_READ : 0);
231 ace->a_perm |= (acl_get_perm_np(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
232 ace->a_perm |= (acl_get_perm_np(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
234 ace->a_perm |= (acl_get_perm(permset, ACL_READ) ? SMB_ACL_READ : 0);
235 ace->a_perm |= (acl_get_perm(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
236 ace->a_perm |= (acl_get_perm(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
241 static struct smb_acl_t *smb_acl_to_internal(acl_t acl, TALLOC_CTX *mem_ctx)
243 struct smb_acl_t *result = sys_acl_init(mem_ctx);
244 int entry_id = ACL_FIRST_ENTRY;
246 if (result == NULL) {
249 while (acl_get_entry(acl, entry_id, &e) == 1) {
251 entry_id = ACL_NEXT_ENTRY;
253 result->acl = talloc_realloc(result, result->acl,
254 struct smb_acl_entry, result->count+1);
255 if (result->acl == NULL) {
257 DEBUG(0, ("talloc_realloc failed\n"));
262 if (!smb_ace_to_internal(e, &result->acl[result->count])) {
272 static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm)
275 acl_permset_t permset;
277 if ((ret = acl_get_permset(entry, &permset)) != 0) {
280 if ((ret = acl_clear_perms(permset)) != 0) {
283 if ((perm & SMB_ACL_READ) &&
284 ((ret = acl_add_perm(permset, ACL_READ)) != 0)) {
287 if ((perm & SMB_ACL_WRITE) &&
288 ((ret = acl_add_perm(permset, ACL_WRITE)) != 0)) {
291 if ((perm & SMB_ACL_EXECUTE) &&
292 ((ret = acl_add_perm(permset, ACL_EXECUTE)) != 0)) {
299 static acl_t smb_acl_to_posix(const struct smb_acl_t *acl)
304 result = acl_init(acl->count);
305 if (result == NULL) {
306 DEBUG(10, ("acl_init failed\n"));
310 for (i=0; i<acl->count; i++) {
311 const struct smb_acl_entry *entry = &acl->acl[i];
315 if (acl_create_entry(&result, &e) != 0) {
316 DEBUG(1, ("acl_create_entry failed: %s\n",
321 switch (entry->a_type) {
325 case SMB_ACL_USER_OBJ:
331 case SMB_ACL_GROUP_OBJ:
341 DEBUG(1, ("Unknown tag value %d\n", entry->a_type));
345 if (acl_set_tag_type(e, tag) != 0) {
346 DEBUG(10, ("acl_set_tag_type(%d) failed: %s\n",
347 tag, strerror(errno)));
351 switch (entry->a_type) {
353 if (acl_set_qualifier(e, &entry->info.user.uid) != 0) {
354 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
360 if (acl_set_qualifier(e, &entry->info.group.gid) != 0) {
361 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
366 default: /* Shut up, compiler! :-) */
370 if (smb_acl_set_mode(e, entry->a_perm) != 0) {
375 if (acl_valid(result) != 0) {
376 char *acl_string = sys_acl_to_text(acl, NULL);
377 DEBUG(0, ("smb_acl_to_posix: ACL %s is invalid for set (%s)\n",
378 acl_string, strerror(errno)));
379 SAFE_FREE(acl_string);
386 if (result != NULL) {
392 /* VFS operations structure */
394 static struct vfs_fn_pointers posixacl_fns = {
395 .sys_acl_get_fd_fn = posixacl_sys_acl_get_fd,
396 .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
397 .sys_acl_set_fd_fn = posixacl_sys_acl_set_fd,
398 .sys_acl_delete_def_fd_fn = posixacl_sys_acl_delete_def_fd,
402 NTSTATUS vfs_posixacl_init(TALLOC_CTX *ctx)
404 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "posixacl",