2 * Store posix-level xattrs in a tdb (posix:eadb format)
4 * Copyright (C) Andrew Bartlett, 2011
6 * Based on vfs_xattr_tdb by
7 * Copyright (C) Volker Lendecke, 2007
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
24 #include "system/filesys.h"
25 #include "smbd/smbd.h"
26 #include "librpc/gen_ndr/xattr.h"
27 #include "librpc/gen_ndr/ndr_xattr.h"
28 #include "../librpc/gen_ndr/ndr_netlogon.h"
29 #include "tdb_compat.h"
30 #include "lib/tdb_wrap/tdb_wrap.h"
31 #include "ntvfs/posix/posix_eadb.h"
32 #include "param/param.h"
33 #include "lib/param/loadparm.h"
36 #define DBGC_CLASS DBGC_VFS
39 * Worker routine for getxattr and fgetxattr
42 static ssize_t posix_eadb_getattr(struct tdb_wrap *db_ctx,
43 const char *fname, int fd,
44 const char *name, void *value, size_t size)
50 DEBUG(10, ("posix_eadb_getattr called for file %s/fd %d, name %s\n",
53 status = pull_xattr_blob_tdb_raw(db_ctx, talloc_tos(), name, fname, fd, size, &blob);
55 if (!NT_STATUS_IS_OK(status)) {
56 DEBUG(10, ("posix_eadb_fetch_attrs failed: %s\n",
62 if (blob.length > size) {
67 memcpy(value, blob.data, blob.length);
74 static ssize_t posix_eadb_getxattr(struct vfs_handle_struct *handle,
75 const char *path, const char *name,
76 void *value, size_t size)
80 SMB_VFS_HANDLE_GET_DATA(handle, db, struct tdb_wrap, return -1);
82 return posix_eadb_getattr(db, path, -1, name, value, size);
85 static ssize_t posix_eadb_fgetxattr(struct vfs_handle_struct *handle,
86 struct files_struct *fsp,
87 const char *name, void *value, size_t size)
91 SMB_VFS_HANDLE_GET_DATA(handle, db, struct tdb_wrap, return -1);
93 return posix_eadb_getattr(db, fsp->fsp_name->base_name, fsp->fh->fd, name, value, size);
97 * Worker routine for setxattr and fsetxattr
100 static int posix_eadb_setattr(struct tdb_wrap *db_ctx,
101 const char *fname, int fd, const char *name,
102 const void *value, size_t size, int flags)
105 DATA_BLOB data = data_blob_const(value, size);
107 DEBUG(10, ("posix_eadb_setattr called for file %s/fd %d, name %s\n",
110 status = push_xattr_blob_tdb_raw(db_ctx, name, fname, fd, &data);
112 if (!NT_STATUS_IS_OK(status)) {
113 DEBUG(10, ("push_xattr_blob_tdb_raw failed: %s\n",
121 static int posix_eadb_setxattr(struct vfs_handle_struct *handle,
122 const char *path, const char *name,
123 const void *value, size_t size, int flags)
127 SMB_VFS_HANDLE_GET_DATA(handle, db, struct tdb_wrap, return -1);
129 return posix_eadb_setattr(db, path, -1, name, value, size, flags);
132 static int posix_eadb_fsetxattr(struct vfs_handle_struct *handle,
133 struct files_struct *fsp,
134 const char *name, const void *value,
135 size_t size, int flags)
139 SMB_VFS_HANDLE_GET_DATA(handle, db, struct tdb_wrap, return -1);
141 return posix_eadb_setattr(db, fsp->fsp_name->base_name, fsp->fh->fd, name, value, size, flags);
145 * Worker routine for listxattr and flistxattr
148 static ssize_t posix_eadb_listattr(struct tdb_wrap *db_ctx,
149 const char *fname, int fd, char *list,
155 status = list_posix_eadb_raw(db_ctx, talloc_tos(), fname, fd, &blob);
157 if (!NT_STATUS_IS_OK(status)) {
158 DEBUG(10, ("posix_eadb_fetch_attrs failed: %s\n",
164 if (blob.length > size) {
166 TALLOC_FREE(blob.data);
170 memcpy(list, blob.data, blob.length);
172 TALLOC_FREE(blob.data);
176 static ssize_t posix_eadb_listxattr(struct vfs_handle_struct *handle,
177 const char *path, char *list, size_t size)
181 SMB_VFS_HANDLE_GET_DATA(handle, db, struct tdb_wrap, return -1);
183 return posix_eadb_listattr(db, path, -1, list, size);
186 static ssize_t posix_eadb_flistxattr(struct vfs_handle_struct *handle,
187 struct files_struct *fsp, char *list,
192 SMB_VFS_HANDLE_GET_DATA(handle, db, struct tdb_wrap, return -1);
194 return posix_eadb_listattr(db, fsp->fsp_name->base_name, fsp->fh->fd, list, size);
198 * Worker routine for removexattr and fremovexattr
201 static int posix_eadb_removeattr(struct tdb_wrap *db_ctx,
202 const char *fname, int fd, const char *name)
206 status = delete_posix_eadb_raw(db_ctx, name, fname, fd);
208 if (!NT_STATUS_IS_OK(status)) {
209 DEBUG(10, ("delete_posix_eadb_raw failed: %s\n",
216 static int posix_eadb_removexattr(struct vfs_handle_struct *handle,
217 const char *path, const char *name)
221 SMB_VFS_HANDLE_GET_DATA(handle, db, struct tdb_wrap, return -1);
223 return posix_eadb_removeattr(db, path, -1, name);
226 static int posix_eadb_fremovexattr(struct vfs_handle_struct *handle,
227 struct files_struct *fsp, const char *name)
231 SMB_VFS_HANDLE_GET_DATA(handle, db, struct tdb_wrap, return -1);
233 return posix_eadb_removeattr(db, fsp->fsp_name->base_name, fsp->fh->fd, name);
237 * Open the tdb file upon VFS_CONNECT
240 static bool posix_eadb_init(int snum, struct tdb_wrap **p_db)
243 struct loadparm_context *lp_ctx;
244 const char *eadb = lp_parm_const_string(snum, "posix", "eadb", NULL);
247 DEBUG(0, ("Can not use vfs_posix_eadb without posix:eadb set\n"));
251 lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
254 db = tdb_wrap_open(NULL, eadb, 50000,
255 TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
259 talloc_unlink(NULL, lp_ctx);
260 /* now we know dbname is not NULL */
276 * On unlink we need to delete the tdb record
278 static int posix_eadb_unlink(vfs_handle_struct *handle,
279 const struct smb_filename *smb_fname)
281 struct smb_filename *smb_fname_tmp = NULL;
285 struct tdb_wrap *ea_tdb;
287 SMB_VFS_HANDLE_GET_DATA(handle, ea_tdb, struct tdb_wrap, return -1);
289 status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
290 if (!NT_STATUS_IS_OK(status)) {
291 errno = map_errno_from_nt_status(status);
295 if (lp_posix_pathnames()) {
296 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
298 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
304 if (smb_fname_tmp->st.st_ex_nlink == 1) {
305 /* Only remove record on last link to file. */
307 if (tdb_transaction_start(ea_tdb->tdb) != 0) {
312 status = unlink_posix_eadb_raw(ea_tdb, smb_fname->base_name, -1);
313 if (!NT_STATUS_IS_OK(status)) {
314 tdb_transaction_cancel(ea_tdb->tdb);
320 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
323 tdb_transaction_cancel(ea_tdb->tdb);
326 if (tdb_transaction_commit(ea_tdb->tdb) != 0) {
333 TALLOC_FREE(smb_fname_tmp);
338 * On rmdir we need to delete the tdb record
340 static int posix_eadb_rmdir(vfs_handle_struct *handle, const char *path)
343 struct tdb_wrap *ea_tdb;
346 SMB_VFS_HANDLE_GET_DATA(handle, ea_tdb, struct tdb_wrap, return -1);
348 if (tdb_transaction_start(ea_tdb->tdb) != 0) {
352 status = unlink_posix_eadb_raw(ea_tdb, path, -1);
353 if (!NT_STATUS_IS_OK(status)) {
354 tdb_transaction_cancel(ea_tdb->tdb);
357 ret = SMB_VFS_NEXT_RMDIR(handle, path);
360 tdb_transaction_cancel(ea_tdb->tdb);
362 if (tdb_transaction_commit(ea_tdb->tdb) != 0) {
371 * Destructor for the VFS private data
374 static void close_xattr_db(void **data)
376 struct tdb_wrap **p_db = (struct tdb_wrap **)data;
380 static int posix_eadb_connect(vfs_handle_struct *handle, const char *service,
387 res = SMB_VFS_NEXT_CONNECT(handle, service, user);
392 snum = find_service(talloc_tos(), service, &sname);
393 if (snum == -1 || sname == NULL) {
395 * Should not happen, but we should not fail just *here*.
400 if (!posix_eadb_init(snum, &db)) {
401 DEBUG(5, ("Could not init xattr tdb\n"));
402 lp_do_parameter(snum, "ea support", "False");
406 lp_do_parameter(snum, "ea support", "True");
408 SMB_VFS_HANDLE_SET_DATA(handle, db, close_xattr_db,
409 struct tdb_wrap, return -1);
414 static struct vfs_fn_pointers vfs_posix_eadb_fns = {
415 .getxattr_fn = posix_eadb_getxattr,
416 .fgetxattr_fn = posix_eadb_fgetxattr,
417 .setxattr_fn = posix_eadb_setxattr,
418 .fsetxattr_fn = posix_eadb_fsetxattr,
419 .listxattr_fn = posix_eadb_listxattr,
420 .flistxattr_fn = posix_eadb_flistxattr,
421 .removexattr_fn = posix_eadb_removexattr,
422 .fremovexattr_fn = posix_eadb_fremovexattr,
423 .unlink_fn = posix_eadb_unlink,
424 .rmdir_fn = posix_eadb_rmdir,
425 .connect_fn = posix_eadb_connect,
428 NTSTATUS vfs_posix_eadb_init(void);
429 NTSTATUS vfs_posix_eadb_init(void)
431 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "posix_eadb",
432 &vfs_posix_eadb_fns);