Line data Source code
1 : /*
2 : * Store streams in xattrs
3 : *
4 : * Copyright (C) Volker Lendecke, 2008
5 : *
6 : * Partly based on James Peach's Darwin module, which is
7 : *
8 : * Copyright (C) James Peach 2006-2007
9 : *
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.
14 : *
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.
19 : *
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/>.
22 : */
23 :
24 : #include "includes.h"
25 : #include "smbd/smbd.h"
26 : #include "system/filesys.h"
27 : #include "lib/util/tevent_unix.h"
28 : #include "librpc/gen_ndr/ioctl.h"
29 : #include "hash_inode.h"
30 :
31 : #undef DBGC_CLASS
32 : #define DBGC_CLASS DBGC_VFS
33 :
34 : struct streams_xattr_config {
35 : const char *prefix;
36 : size_t prefix_len;
37 : bool store_stream_type;
38 : };
39 :
40 : struct stream_io {
41 : char *base;
42 : char *xattr_name;
43 : void *fsp_name_ptr;
44 : files_struct *fsp;
45 : vfs_handle_struct *handle;
46 : };
47 :
48 2674 : static ssize_t get_xattr_size_fsp(struct files_struct *fsp,
49 : const char *xattr_name)
50 : {
51 : NTSTATUS status;
52 : struct ea_struct ea;
53 : ssize_t result;
54 :
55 2674 : status = get_ea_value_fsp(talloc_tos(),
56 : fsp,
57 : xattr_name,
58 : &ea);
59 2674 : if (!NT_STATUS_IS_OK(status)) {
60 6 : return -1;
61 : }
62 :
63 2668 : result = ea.value.length-1;
64 2668 : TALLOC_FREE(ea.value.data);
65 2668 : return result;
66 : }
67 :
68 : /**
69 : * Given a stream name, populate xattr_name with the xattr name to use for
70 : * accessing the stream.
71 : */
72 5017 : static NTSTATUS streams_xattr_get_name(vfs_handle_struct *handle,
73 : TALLOC_CTX *ctx,
74 : const char *stream_name,
75 : char **xattr_name)
76 : {
77 5017 : size_t stream_name_len = strlen(stream_name);
78 : char *stype;
79 : struct streams_xattr_config *config;
80 :
81 5017 : SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
82 : return NT_STATUS_UNSUCCESSFUL);
83 :
84 5017 : SMB_ASSERT(stream_name[0] == ':');
85 5017 : stream_name += 1;
86 :
87 : /*
88 : * With vfs_fruit option "fruit:encoding = native" we're
89 : * already converting stream names that contain illegal NTFS
90 : * characters from their on-the-wire Unicode Private Range
91 : * encoding to their native ASCII representation.
92 : *
93 : * As as result the name of xattrs storing the streams (via
94 : * vfs_streams_xattr) may contain a colon, so we have to use
95 : * strrchr_m() instead of strchr_m() for matching the stream
96 : * type suffix.
97 : *
98 : * In check_path_syntax() we've already ensured the streamname
99 : * we got from the client is valid.
100 : */
101 5017 : stype = strrchr_m(stream_name, ':');
102 :
103 5017 : if (stype) {
104 : /*
105 : * We only support one stream type: "$DATA"
106 : */
107 3720 : if (strcasecmp_m(stype, ":$DATA") != 0) {
108 8 : return NT_STATUS_INVALID_PARAMETER;
109 : }
110 :
111 : /* Split name and type */
112 3712 : stream_name_len = (stype - stream_name);
113 : }
114 :
115 5009 : *xattr_name = talloc_asprintf(ctx, "%s%.*s%s",
116 : config->prefix,
117 : (int)stream_name_len,
118 : stream_name,
119 5009 : config->store_stream_type ? ":$DATA" : "");
120 5009 : if (*xattr_name == NULL) {
121 0 : return NT_STATUS_NO_MEMORY;
122 : }
123 :
124 5009 : DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name,
125 : stream_name));
126 :
127 5009 : return NT_STATUS_OK;
128 : }
129 :
130 3453 : static bool streams_xattr_recheck(struct stream_io *sio)
131 : {
132 : NTSTATUS status;
133 3453 : char *xattr_name = NULL;
134 :
135 3453 : if (sio->fsp->fsp_name == sio->fsp_name_ptr) {
136 3450 : return true;
137 : }
138 :
139 3 : if (sio->fsp->fsp_name->stream_name == NULL) {
140 : /* how can this happen */
141 0 : errno = EINVAL;
142 0 : return false;
143 : }
144 :
145 3 : status = streams_xattr_get_name(sio->handle, talloc_tos(),
146 3 : sio->fsp->fsp_name->stream_name,
147 : &xattr_name);
148 3 : if (!NT_STATUS_IS_OK(status)) {
149 0 : return false;
150 : }
151 :
152 3 : TALLOC_FREE(sio->xattr_name);
153 3 : TALLOC_FREE(sio->base);
154 3 : sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
155 : xattr_name);
156 3 : if (sio->xattr_name == NULL) {
157 0 : DBG_DEBUG("sio->xattr_name==NULL\n");
158 0 : return false;
159 : }
160 3 : TALLOC_FREE(xattr_name);
161 :
162 3 : sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
163 3 : sio->fsp->fsp_name->base_name);
164 3 : if (sio->base == NULL) {
165 0 : DBG_DEBUG("sio->base==NULL\n");
166 0 : return false;
167 : }
168 :
169 3 : sio->fsp_name_ptr = sio->fsp->fsp_name;
170 :
171 3 : return true;
172 : }
173 :
174 85818 : static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
175 : SMB_STRUCT_STAT *sbuf)
176 : {
177 85818 : int ret = -1;
178 : struct stream_io *io = (struct stream_io *)
179 85818 : VFS_FETCH_FSP_EXTENSION(handle, fsp);
180 :
181 85818 : if (io == NULL || !fsp_is_alternate_stream(fsp)) {
182 83156 : return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
183 : }
184 :
185 2662 : DBG_DEBUG("streams_xattr_fstat called for %s\n", fsp_str_dbg(io->fsp));
186 :
187 2662 : if (!streams_xattr_recheck(io)) {
188 0 : return -1;
189 : }
190 :
191 2662 : ret = SMB_VFS_NEXT_FSTAT(handle, fsp->base_fsp, sbuf);
192 2662 : if (ret == -1) {
193 0 : return -1;
194 : }
195 :
196 5324 : sbuf->st_ex_size = get_xattr_size_fsp(fsp->base_fsp,
197 2662 : io->xattr_name);
198 2662 : if (sbuf->st_ex_size == -1) {
199 0 : SET_STAT_INVALID(*sbuf);
200 0 : return -1;
201 : }
202 :
203 2662 : DEBUG(10, ("sbuf->st_ex_size = %d\n", (int)sbuf->st_ex_size));
204 :
205 2662 : sbuf->st_ex_ino = hash_inode(sbuf, io->xattr_name);
206 2662 : sbuf->st_ex_mode &= ~S_IFMT;
207 2662 : sbuf->st_ex_mode &= ~S_IFDIR;
208 2662 : sbuf->st_ex_mode |= S_IFREG;
209 2662 : sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
210 :
211 2662 : return 0;
212 : }
213 :
214 103262 : static int streams_xattr_stat(vfs_handle_struct *handle,
215 : struct smb_filename *smb_fname)
216 : {
217 : NTSTATUS status;
218 103262 : int result = -1;
219 103262 : char *xattr_name = NULL;
220 103262 : char *tmp_stream_name = NULL;
221 103262 : struct smb_filename *pathref = NULL;
222 103262 : struct files_struct *fsp = smb_fname->fsp;
223 :
224 103262 : if (!is_named_stream(smb_fname)) {
225 103250 : return SMB_VFS_NEXT_STAT(handle, smb_fname);
226 : }
227 :
228 : /* Note if lp_posix_paths() is true, we can never
229 : * get here as is_named_stream() is
230 : * always false. So we never need worry about
231 : * not following links here. */
232 :
233 : /* Populate the stat struct with info from the base file. */
234 12 : tmp_stream_name = smb_fname->stream_name;
235 12 : smb_fname->stream_name = NULL;
236 12 : result = SMB_VFS_NEXT_STAT(handle, smb_fname);
237 12 : smb_fname->stream_name = tmp_stream_name;
238 :
239 12 : if (result == -1) {
240 0 : return -1;
241 : }
242 :
243 : /* Derive the xattr name to lookup. */
244 12 : status = streams_xattr_get_name(handle, talloc_tos(),
245 12 : smb_fname->stream_name, &xattr_name);
246 12 : if (!NT_STATUS_IS_OK(status)) {
247 0 : errno = map_errno_from_nt_status(status);
248 0 : return -1;
249 : }
250 :
251 : /* Augment the base file's stat information before returning. */
252 12 : if (fsp == NULL) {
253 12 : status = synthetic_pathref(talloc_tos(),
254 12 : handle->conn->cwd_fsp,
255 12 : smb_fname->base_name,
256 : NULL,
257 : NULL,
258 : smb_fname->twrp,
259 : smb_fname->flags,
260 : &pathref);
261 12 : if (!NT_STATUS_IS_OK(status)) {
262 0 : TALLOC_FREE(xattr_name);
263 0 : SET_STAT_INVALID(smb_fname->st);
264 0 : errno = ENOENT;
265 0 : return -1;
266 : }
267 12 : fsp = pathref->fsp;
268 : } else {
269 0 : fsp = fsp->base_fsp;
270 : }
271 :
272 12 : smb_fname->st.st_ex_size = get_xattr_size_fsp(fsp,
273 : xattr_name);
274 12 : if (smb_fname->st.st_ex_size == -1) {
275 6 : TALLOC_FREE(xattr_name);
276 6 : TALLOC_FREE(pathref);
277 6 : SET_STAT_INVALID(smb_fname->st);
278 6 : errno = ENOENT;
279 6 : return -1;
280 : }
281 :
282 6 : smb_fname->st.st_ex_ino = hash_inode(&smb_fname->st, xattr_name);
283 6 : smb_fname->st.st_ex_mode &= ~S_IFMT;
284 6 : smb_fname->st.st_ex_mode |= S_IFREG;
285 6 : smb_fname->st.st_ex_blocks =
286 6 : smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
287 :
288 6 : TALLOC_FREE(xattr_name);
289 6 : TALLOC_FREE(pathref);
290 6 : return 0;
291 : }
292 :
293 4500 : static int streams_xattr_lstat(vfs_handle_struct *handle,
294 : struct smb_filename *smb_fname)
295 : {
296 4500 : if (is_named_stream(smb_fname)) {
297 : /*
298 : * There can never be EA's on a symlink.
299 : * Windows will never see a symlink, and
300 : * in SMB_FILENAME_POSIX_PATH mode we don't
301 : * allow EA's on a symlink.
302 : */
303 0 : SET_STAT_INVALID(smb_fname->st);
304 0 : errno = ENOENT;
305 0 : return -1;
306 : }
307 4500 : return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
308 : }
309 :
310 85002 : static int streams_xattr_openat(struct vfs_handle_struct *handle,
311 : const struct files_struct *dirfsp,
312 : const struct smb_filename *smb_fname,
313 : files_struct *fsp,
314 : const struct vfs_open_how *how)
315 : {
316 : NTSTATUS status;
317 85002 : struct streams_xattr_config *config = NULL;
318 85002 : struct stream_io *sio = NULL;
319 : struct ea_struct ea;
320 85002 : char *xattr_name = NULL;
321 85002 : int fakefd = -1;
322 85002 : bool set_empty_xattr = false;
323 : int ret;
324 :
325 85002 : SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
326 : return -1);
327 :
328 85002 : DBG_DEBUG("called for %s with flags 0x%x\n",
329 : smb_fname_str_dbg(smb_fname),
330 : how->flags);
331 :
332 85002 : if (!is_named_stream(smb_fname)) {
333 80404 : return SMB_VFS_NEXT_OPENAT(handle,
334 : dirfsp,
335 : smb_fname,
336 : fsp,
337 : how);
338 : }
339 :
340 4598 : if (how->resolve != 0) {
341 0 : errno = ENOSYS;
342 0 : return -1;
343 : }
344 :
345 4598 : SMB_ASSERT(fsp_is_alternate_stream(fsp));
346 4598 : SMB_ASSERT(dirfsp == NULL);
347 :
348 4598 : status = streams_xattr_get_name(handle, talloc_tos(),
349 4598 : smb_fname->stream_name, &xattr_name);
350 4598 : if (!NT_STATUS_IS_OK(status)) {
351 8 : errno = map_errno_from_nt_status(status);
352 8 : goto fail;
353 : }
354 :
355 4590 : status = get_ea_value_fsp(talloc_tos(),
356 4590 : fsp->base_fsp,
357 : xattr_name,
358 : &ea);
359 :
360 4590 : DBG_DEBUG("get_ea_value_fsp returned %s\n", nt_errstr(status));
361 :
362 4590 : if (!NT_STATUS_IS_OK(status)) {
363 2600 : if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
364 : /*
365 : * The base file is not there. This is an error even if
366 : * we got O_CREAT, the higher levels should have created
367 : * the base file for us.
368 : */
369 0 : DBG_DEBUG("streams_xattr_open: base file %s not around, "
370 : "returning ENOENT\n", smb_fname->base_name);
371 0 : errno = ENOENT;
372 0 : goto fail;
373 : }
374 :
375 2600 : if (!(how->flags & O_CREAT)) {
376 2162 : errno = ENOATTR;
377 2162 : goto fail;
378 : }
379 :
380 438 : set_empty_xattr = true;
381 : }
382 :
383 2428 : if (how->flags & O_TRUNC) {
384 0 : set_empty_xattr = true;
385 : }
386 :
387 2428 : if (set_empty_xattr) {
388 : /*
389 : * The attribute does not exist or needs to be truncated
390 : */
391 :
392 : /*
393 : * Darn, xattrs need at least 1 byte
394 : */
395 438 : char null = '\0';
396 :
397 438 : DEBUG(10, ("creating or truncating attribute %s on file %s\n",
398 : xattr_name, smb_fname->base_name));
399 :
400 438 : ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
401 : xattr_name,
402 : &null, sizeof(null),
403 : how->flags & O_EXCL ? XATTR_CREATE : 0);
404 438 : if (ret != 0) {
405 0 : goto fail;
406 : }
407 : }
408 :
409 2428 : fakefd = vfs_fake_fd();
410 :
411 2428 : sio = VFS_ADD_FSP_EXTENSION(handle, fsp, struct stream_io, NULL);
412 2428 : if (sio == NULL) {
413 0 : errno = ENOMEM;
414 0 : goto fail;
415 : }
416 :
417 2428 : sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
418 : xattr_name);
419 2428 : if (sio->xattr_name == NULL) {
420 0 : errno = ENOMEM;
421 0 : goto fail;
422 : }
423 :
424 : /*
425 : * so->base needs to be a copy of fsp->fsp_name->base_name,
426 : * making it identical to streams_xattr_recheck(). If the
427 : * open is changing directories, fsp->fsp_name->base_name
428 : * will be the full path from the share root, whilst
429 : * smb_fname will be relative to the $cwd.
430 : */
431 2428 : sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
432 2428 : fsp->fsp_name->base_name);
433 2428 : if (sio->base == NULL) {
434 0 : errno = ENOMEM;
435 0 : goto fail;
436 : }
437 :
438 2428 : sio->fsp_name_ptr = fsp->fsp_name;
439 2428 : sio->handle = handle;
440 2428 : sio->fsp = fsp;
441 :
442 2428 : return fakefd;
443 :
444 2170 : fail:
445 2170 : if (fakefd >= 0) {
446 0 : vfs_fake_fd_close(fakefd);
447 0 : fakefd = -1;
448 : }
449 :
450 2170 : return -1;
451 : }
452 :
453 55900 : static int streams_xattr_close(vfs_handle_struct *handle,
454 : files_struct *fsp)
455 : {
456 : int ret;
457 : int fd;
458 :
459 55900 : fd = fsp_get_pathref_fd(fsp);
460 :
461 55900 : DBG_DEBUG("streams_xattr_close called [%s] fd [%d]\n",
462 : smb_fname_str_dbg(fsp->fsp_name), fd);
463 :
464 55900 : if (!fsp_is_alternate_stream(fsp)) {
465 53478 : return SMB_VFS_NEXT_CLOSE(handle, fsp);
466 : }
467 :
468 2422 : ret = vfs_fake_fd_close(fd);
469 2422 : fsp_set_fd(fsp, -1);
470 :
471 2422 : return ret;
472 : }
473 :
474 2069 : static int streams_xattr_unlinkat(vfs_handle_struct *handle,
475 : struct files_struct *dirfsp,
476 : const struct smb_filename *smb_fname,
477 : int flags)
478 : {
479 : NTSTATUS status;
480 2069 : int ret = -1;
481 2069 : char *xattr_name = NULL;
482 2069 : struct smb_filename *pathref = NULL;
483 2069 : struct files_struct *fsp = smb_fname->fsp;
484 :
485 2069 : if (!is_named_stream(smb_fname)) {
486 1665 : return SMB_VFS_NEXT_UNLINKAT(handle,
487 : dirfsp,
488 : smb_fname,
489 : flags);
490 : }
491 :
492 : /* A stream can never be rmdir'ed */
493 404 : SMB_ASSERT((flags & AT_REMOVEDIR) == 0);
494 :
495 404 : status = streams_xattr_get_name(handle, talloc_tos(),
496 404 : smb_fname->stream_name, &xattr_name);
497 404 : if (!NT_STATUS_IS_OK(status)) {
498 0 : errno = map_errno_from_nt_status(status);
499 0 : goto fail;
500 : }
501 :
502 404 : if (fsp == NULL) {
503 2 : status = synthetic_pathref(talloc_tos(),
504 2 : handle->conn->cwd_fsp,
505 2 : smb_fname->base_name,
506 : NULL,
507 : NULL,
508 2 : smb_fname->twrp,
509 2 : smb_fname->flags,
510 : &pathref);
511 2 : if (!NT_STATUS_IS_OK(status)) {
512 0 : errno = ENOENT;
513 0 : goto fail;
514 : }
515 2 : fsp = pathref->fsp;
516 : } else {
517 402 : SMB_ASSERT(fsp_is_alternate_stream(smb_fname->fsp));
518 402 : fsp = fsp->base_fsp;
519 : }
520 :
521 404 : ret = SMB_VFS_FREMOVEXATTR(fsp, xattr_name);
522 :
523 404 : if ((ret == -1) && (errno == ENOATTR)) {
524 2 : errno = ENOENT;
525 2 : goto fail;
526 : }
527 :
528 402 : ret = 0;
529 :
530 404 : fail:
531 404 : TALLOC_FREE(xattr_name);
532 404 : TALLOC_FREE(pathref);
533 404 : return ret;
534 : }
535 :
536 8 : static int streams_xattr_renameat(vfs_handle_struct *handle,
537 : files_struct *srcfsp,
538 : const struct smb_filename *smb_fname_src,
539 : files_struct *dstfsp,
540 : const struct smb_filename *smb_fname_dst)
541 : {
542 : NTSTATUS status;
543 8 : int ret = -1;
544 8 : char *src_xattr_name = NULL;
545 8 : char *dst_xattr_name = NULL;
546 : bool src_is_stream, dst_is_stream;
547 : ssize_t oret;
548 : ssize_t nret;
549 : struct ea_struct ea;
550 8 : struct smb_filename *pathref_src = NULL;
551 8 : struct smb_filename *pathref_dst = NULL;
552 8 : struct smb_filename *full_src = NULL;
553 8 : struct smb_filename *full_dst = NULL;
554 :
555 8 : src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
556 8 : dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
557 :
558 8 : if (!src_is_stream && !dst_is_stream) {
559 8 : return SMB_VFS_NEXT_RENAMEAT(handle,
560 : srcfsp,
561 : smb_fname_src,
562 : dstfsp,
563 : smb_fname_dst);
564 : }
565 :
566 : /* For now don't allow renames from or to the default stream. */
567 0 : if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
568 0 : is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
569 0 : errno = ENOSYS;
570 0 : goto done;
571 : }
572 :
573 : /* Don't rename if the streams are identical. */
574 0 : if (strcasecmp_m(smb_fname_src->stream_name,
575 0 : smb_fname_dst->stream_name) == 0) {
576 0 : goto done;
577 : }
578 :
579 : /* Get the xattr names. */
580 0 : status = streams_xattr_get_name(handle, talloc_tos(),
581 0 : smb_fname_src->stream_name,
582 : &src_xattr_name);
583 0 : if (!NT_STATUS_IS_OK(status)) {
584 0 : errno = map_errno_from_nt_status(status);
585 0 : goto fail;
586 : }
587 0 : status = streams_xattr_get_name(handle, talloc_tos(),
588 0 : smb_fname_dst->stream_name,
589 : &dst_xattr_name);
590 0 : if (!NT_STATUS_IS_OK(status)) {
591 0 : errno = map_errno_from_nt_status(status);
592 0 : goto fail;
593 : }
594 :
595 0 : full_src = full_path_from_dirfsp_atname(talloc_tos(),
596 : srcfsp,
597 : smb_fname_src);
598 0 : if (full_src == NULL) {
599 0 : errno = ENOMEM;
600 0 : goto fail;
601 : }
602 0 : full_dst = full_path_from_dirfsp_atname(talloc_tos(),
603 : dstfsp,
604 : smb_fname_dst);
605 0 : if (full_dst == NULL) {
606 0 : errno = ENOMEM;
607 0 : goto fail;
608 : }
609 :
610 : /* Get a pathref for full_src (base file, no stream name). */
611 0 : status = synthetic_pathref(talloc_tos(),
612 0 : handle->conn->cwd_fsp,
613 0 : full_src->base_name,
614 : NULL,
615 : NULL,
616 : full_src->twrp,
617 : full_src->flags,
618 : &pathref_src);
619 0 : if (!NT_STATUS_IS_OK(status)) {
620 0 : errno = ENOENT;
621 0 : goto fail;
622 : }
623 :
624 : /* Read the old stream from the base file fsp. */
625 0 : status = get_ea_value_fsp(talloc_tos(),
626 0 : pathref_src->fsp,
627 : src_xattr_name,
628 : &ea);
629 0 : if (!NT_STATUS_IS_OK(status)) {
630 0 : errno = map_errno_from_nt_status(status);
631 0 : goto fail;
632 : }
633 :
634 : /* Get a pathref for full_dst (base file, no stream name). */
635 0 : status = synthetic_pathref(talloc_tos(),
636 0 : handle->conn->cwd_fsp,
637 0 : full_dst->base_name,
638 : NULL,
639 : NULL,
640 : full_dst->twrp,
641 : full_dst->flags,
642 : &pathref_dst);
643 0 : if (!NT_STATUS_IS_OK(status)) {
644 0 : errno = ENOENT;
645 0 : goto fail;
646 : }
647 :
648 : /* (Over)write the new stream on the base file fsp. */
649 0 : nret = SMB_VFS_FSETXATTR(
650 : pathref_dst->fsp,
651 : dst_xattr_name,
652 : ea.value.data,
653 : ea.value.length,
654 : 0);
655 0 : if (nret < 0) {
656 0 : if (errno == ENOATTR) {
657 0 : errno = ENOENT;
658 : }
659 0 : goto fail;
660 : }
661 :
662 : /*
663 : * Remove the old stream from the base file fsp.
664 : */
665 0 : oret = SMB_VFS_FREMOVEXATTR(pathref_src->fsp,
666 : src_xattr_name);
667 0 : if (oret < 0) {
668 0 : if (errno == ENOATTR) {
669 0 : errno = ENOENT;
670 : }
671 0 : goto fail;
672 : }
673 :
674 0 : done:
675 0 : errno = 0;
676 0 : ret = 0;
677 0 : fail:
678 0 : TALLOC_FREE(pathref_src);
679 0 : TALLOC_FREE(pathref_dst);
680 0 : TALLOC_FREE(full_src);
681 0 : TALLOC_FREE(full_dst);
682 0 : TALLOC_FREE(src_xattr_name);
683 0 : TALLOC_FREE(dst_xattr_name);
684 0 : return ret;
685 : }
686 :
687 6000 : static NTSTATUS walk_xattr_streams(vfs_handle_struct *handle,
688 : files_struct *fsp,
689 : const struct smb_filename *smb_fname,
690 : bool (*fn)(struct ea_struct *ea,
691 : void *private_data),
692 : void *private_data)
693 : {
694 : NTSTATUS status;
695 : char **names;
696 : size_t i, num_names;
697 : struct streams_xattr_config *config;
698 :
699 6000 : SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
700 : return NT_STATUS_UNSUCCESSFUL);
701 :
702 6000 : status = get_ea_names_from_fsp(talloc_tos(),
703 6000 : smb_fname->fsp,
704 : &names,
705 : &num_names);
706 6000 : if (!NT_STATUS_IS_OK(status)) {
707 0 : return status;
708 : }
709 :
710 20684 : for (i=0; i<num_names; i++) {
711 : struct ea_struct ea;
712 :
713 : /*
714 : * We want to check with samba_private_attr_name()
715 : * whether the xattr name is a private one,
716 : * unfortunately it flags xattrs that begin with the
717 : * default streams prefix as private.
718 : *
719 : * By only calling samba_private_attr_name() in case
720 : * the xattr does NOT begin with the default prefix,
721 : * we know that if it returns 'true' it definitely one
722 : * of our internal xattr like "user.DOSATTRIB".
723 : */
724 14684 : if (strncasecmp_m(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
725 : strlen(SAMBA_XATTR_DOSSTREAM_PREFIX)) != 0) {
726 13718 : if (samba_private_attr_name(names[i])) {
727 13718 : continue;
728 : }
729 : }
730 :
731 3122 : if (strncmp(names[i], config->prefix,
732 : config->prefix_len) != 0) {
733 2156 : continue;
734 : }
735 :
736 966 : status = get_ea_value_fsp(names,
737 966 : smb_fname->fsp,
738 966 : names[i],
739 : &ea);
740 966 : if (!NT_STATUS_IS_OK(status)) {
741 0 : DEBUG(10, ("Could not get ea %s for file %s: %s\n",
742 : names[i],
743 : smb_fname->base_name,
744 : nt_errstr(status)));
745 0 : continue;
746 : }
747 :
748 966 : ea.name = talloc_asprintf(
749 966 : ea.value.data, ":%s%s",
750 966 : names[i] + config->prefix_len,
751 966 : config->store_stream_type ? "" : ":$DATA");
752 966 : if (ea.name == NULL) {
753 0 : DEBUG(0, ("talloc failed\n"));
754 0 : continue;
755 : }
756 :
757 966 : if (!fn(&ea, private_data)) {
758 0 : TALLOC_FREE(ea.value.data);
759 0 : return NT_STATUS_OK;
760 : }
761 :
762 966 : TALLOC_FREE(ea.value.data);
763 : }
764 :
765 6000 : TALLOC_FREE(names);
766 6000 : return NT_STATUS_OK;
767 : }
768 :
769 966 : static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
770 : struct stream_struct **streams,
771 : const char *name, off_t size,
772 : off_t alloc_size)
773 : {
774 : struct stream_struct *tmp;
775 :
776 966 : tmp = talloc_realloc(mem_ctx, *streams, struct stream_struct,
777 : (*num_streams)+1);
778 966 : if (tmp == NULL) {
779 0 : return false;
780 : }
781 :
782 966 : tmp[*num_streams].name = talloc_strdup(tmp, name);
783 966 : if (tmp[*num_streams].name == NULL) {
784 0 : return false;
785 : }
786 :
787 966 : tmp[*num_streams].size = size;
788 966 : tmp[*num_streams].alloc_size = alloc_size;
789 :
790 966 : *streams = tmp;
791 966 : *num_streams += 1;
792 966 : return true;
793 : }
794 :
795 : struct streaminfo_state {
796 : TALLOC_CTX *mem_ctx;
797 : vfs_handle_struct *handle;
798 : unsigned int num_streams;
799 : struct stream_struct *streams;
800 : NTSTATUS status;
801 : };
802 :
803 966 : static bool collect_one_stream(struct ea_struct *ea, void *private_data)
804 : {
805 966 : struct streaminfo_state *state =
806 : (struct streaminfo_state *)private_data;
807 :
808 966 : if (!add_one_stream(state->mem_ctx,
809 : &state->num_streams, &state->streams,
810 966 : ea->name, ea->value.length-1,
811 966 : smb_roundup(state->handle->conn,
812 966 : ea->value.length-1))) {
813 0 : state->status = NT_STATUS_NO_MEMORY;
814 0 : return false;
815 : }
816 :
817 966 : return true;
818 : }
819 :
820 6000 : static NTSTATUS streams_xattr_fstreaminfo(vfs_handle_struct *handle,
821 : struct files_struct *fsp,
822 : TALLOC_CTX *mem_ctx,
823 : unsigned int *pnum_streams,
824 : struct stream_struct **pstreams)
825 : {
826 : NTSTATUS status;
827 : struct streaminfo_state state;
828 :
829 6000 : state.streams = *pstreams;
830 6000 : state.num_streams = *pnum_streams;
831 6000 : state.mem_ctx = mem_ctx;
832 6000 : state.handle = handle;
833 6000 : state.status = NT_STATUS_OK;
834 :
835 6000 : status = walk_xattr_streams(handle,
836 : fsp,
837 6000 : fsp->fsp_name,
838 : collect_one_stream,
839 : &state);
840 :
841 6000 : if (!NT_STATUS_IS_OK(status)) {
842 0 : TALLOC_FREE(state.streams);
843 0 : return status;
844 : }
845 :
846 6000 : if (!NT_STATUS_IS_OK(state.status)) {
847 0 : TALLOC_FREE(state.streams);
848 0 : return state.status;
849 : }
850 :
851 6000 : *pnum_streams = state.num_streams;
852 6000 : *pstreams = state.streams;
853 :
854 6000 : return SMB_VFS_NEXT_FSTREAMINFO(handle,
855 : fsp,
856 : mem_ctx,
857 : pnum_streams,
858 : pstreams);
859 : }
860 :
861 429 : static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle,
862 : enum timestamp_set_resolution *p_ts_res)
863 : {
864 429 : return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
865 : }
866 :
867 429 : static int streams_xattr_connect(vfs_handle_struct *handle,
868 : const char *service, const char *user)
869 : {
870 : struct streams_xattr_config *config;
871 429 : const char *default_prefix = SAMBA_XATTR_DOSSTREAM_PREFIX;
872 : const char *prefix;
873 : int rc;
874 :
875 429 : rc = SMB_VFS_NEXT_CONNECT(handle, service, user);
876 429 : if (rc != 0) {
877 0 : return rc;
878 : }
879 :
880 429 : config = talloc_zero(handle->conn, struct streams_xattr_config);
881 429 : if (config == NULL) {
882 0 : DEBUG(1, ("talloc_zero() failed\n"));
883 0 : errno = ENOMEM;
884 0 : return -1;
885 : }
886 :
887 429 : prefix = lp_parm_const_string(SNUM(handle->conn),
888 : "streams_xattr", "prefix",
889 : default_prefix);
890 429 : config->prefix = talloc_strdup(config, prefix);
891 429 : if (config->prefix == NULL) {
892 0 : DEBUG(1, ("talloc_strdup() failed\n"));
893 0 : errno = ENOMEM;
894 0 : return -1;
895 : }
896 429 : config->prefix_len = strlen(config->prefix);
897 429 : DEBUG(10, ("streams_xattr using stream prefix: %s\n", config->prefix));
898 :
899 429 : config->store_stream_type = lp_parm_bool(SNUM(handle->conn),
900 : "streams_xattr",
901 : "store_stream_type",
902 : true);
903 :
904 429 : SMB_VFS_HANDLE_SET_DATA(handle, config,
905 : NULL, struct stream_xattr_config,
906 : return -1);
907 :
908 429 : return 0;
909 : }
910 :
911 916 : static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
912 : files_struct *fsp, const void *data,
913 : size_t n, off_t offset)
914 : {
915 : struct stream_io *sio =
916 916 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
917 : struct ea_struct ea;
918 : NTSTATUS status;
919 : int ret;
920 :
921 916 : DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
922 :
923 916 : if (sio == NULL) {
924 492 : return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
925 : }
926 :
927 424 : if (!streams_xattr_recheck(sio)) {
928 0 : return -1;
929 : }
930 :
931 424 : if ((offset + n) >= lp_smbd_max_xattr_size(SNUM(handle->conn))) {
932 : /*
933 : * Requested write is beyond what can be read based on
934 : * samba configuration.
935 : * ReFS returns STATUS_FILESYSTEM_LIMITATION, which causes
936 : * entire file to be skipped by File Explorer. VFAT returns
937 : * NT_STATUS_OBJECT_NAME_COLLISION causes user to be prompted
938 : * to skip writing metadata, but copy data.
939 : */
940 0 : DBG_ERR("Write to xattr [%s] on file [%s] exceeds maximum "
941 : "supported extended attribute size. "
942 : "Depending on filesystem type and operating system "
943 : "(OS) specifics, this value may be increased using "
944 : "the value of the parameter: "
945 : "smbd max xattr size = <bytes>. Consult OS and "
946 : "filesystem manpages prior to increasing this limit.\n",
947 : sio->xattr_name, sio->base);
948 0 : errno = EOVERFLOW;
949 0 : return -1;
950 : }
951 :
952 424 : status = get_ea_value_fsp(talloc_tos(),
953 424 : fsp->base_fsp,
954 424 : sio->xattr_name,
955 : &ea);
956 424 : if (!NT_STATUS_IS_OK(status)) {
957 0 : return -1;
958 : }
959 :
960 424 : if ((offset + n) > ea.value.length-1) {
961 : uint8_t *tmp;
962 :
963 392 : tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
964 : offset + n + 1);
965 :
966 392 : if (tmp == NULL) {
967 0 : TALLOC_FREE(ea.value.data);
968 0 : errno = ENOMEM;
969 0 : return -1;
970 : }
971 392 : ea.value.data = tmp;
972 392 : ea.value.length = offset + n + 1;
973 392 : ea.value.data[offset+n] = 0;
974 : }
975 :
976 424 : memcpy(ea.value.data + offset, data, n);
977 :
978 424 : ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
979 : sio->xattr_name,
980 : ea.value.data,
981 : ea.value.length,
982 : 0);
983 424 : TALLOC_FREE(ea.value.data);
984 :
985 424 : if (ret == -1) {
986 0 : return -1;
987 : }
988 :
989 424 : return n;
990 : }
991 :
992 2703 : static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
993 : files_struct *fsp, void *data,
994 : size_t n, off_t offset)
995 : {
996 : struct stream_io *sio =
997 2703 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
998 : struct ea_struct ea;
999 : NTSTATUS status;
1000 : size_t length, overlap;
1001 :
1002 2703 : DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
1003 : (int)offset, (int)n));
1004 :
1005 2703 : if (sio == NULL) {
1006 2382 : return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
1007 : }
1008 :
1009 321 : if (!streams_xattr_recheck(sio)) {
1010 0 : return -1;
1011 : }
1012 :
1013 321 : status = get_ea_value_fsp(talloc_tos(),
1014 321 : fsp->base_fsp,
1015 321 : sio->xattr_name,
1016 : &ea);
1017 321 : if (!NT_STATUS_IS_OK(status)) {
1018 0 : return -1;
1019 : }
1020 :
1021 321 : length = ea.value.length-1;
1022 :
1023 321 : DBG_DEBUG("get_ea_value_fsp returned %d bytes\n",
1024 : (int)length);
1025 :
1026 : /* Attempt to read past EOF. */
1027 321 : if (length <= offset) {
1028 0 : return 0;
1029 : }
1030 :
1031 321 : overlap = (offset + n) > length ? (length - offset) : n;
1032 321 : memcpy(data, ea.value.data + offset, overlap);
1033 :
1034 321 : TALLOC_FREE(ea.value.data);
1035 321 : return overlap;
1036 : }
1037 :
1038 : struct streams_xattr_pread_state {
1039 : ssize_t nread;
1040 : struct vfs_aio_state vfs_aio_state;
1041 : };
1042 :
1043 : static void streams_xattr_pread_done(struct tevent_req *subreq);
1044 :
1045 12 : static struct tevent_req *streams_xattr_pread_send(
1046 : struct vfs_handle_struct *handle,
1047 : TALLOC_CTX *mem_ctx,
1048 : struct tevent_context *ev,
1049 : struct files_struct *fsp,
1050 : void *data,
1051 : size_t n, off_t offset)
1052 : {
1053 12 : struct tevent_req *req = NULL;
1054 12 : struct tevent_req *subreq = NULL;
1055 12 : struct streams_xattr_pread_state *state = NULL;
1056 : struct stream_io *sio =
1057 12 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1058 :
1059 12 : req = tevent_req_create(mem_ctx, &state,
1060 : struct streams_xattr_pread_state);
1061 12 : if (req == NULL) {
1062 0 : return NULL;
1063 : }
1064 :
1065 12 : if (sio == NULL) {
1066 6 : subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp,
1067 : data, n, offset);
1068 6 : if (tevent_req_nomem(req, subreq)) {
1069 0 : return tevent_req_post(req, ev);
1070 : }
1071 6 : tevent_req_set_callback(subreq, streams_xattr_pread_done, req);
1072 6 : return req;
1073 : }
1074 :
1075 6 : state->nread = SMB_VFS_PREAD(fsp, data, n, offset);
1076 6 : if (state->nread != n) {
1077 0 : if (state->nread != -1) {
1078 0 : errno = EIO;
1079 : }
1080 0 : tevent_req_error(req, errno);
1081 0 : return tevent_req_post(req, ev);
1082 : }
1083 :
1084 6 : tevent_req_done(req);
1085 6 : return tevent_req_post(req, ev);
1086 : }
1087 :
1088 6 : static void streams_xattr_pread_done(struct tevent_req *subreq)
1089 : {
1090 6 : struct tevent_req *req = tevent_req_callback_data(
1091 : subreq, struct tevent_req);
1092 6 : struct streams_xattr_pread_state *state = tevent_req_data(
1093 : req, struct streams_xattr_pread_state);
1094 :
1095 6 : state->nread = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
1096 6 : TALLOC_FREE(subreq);
1097 :
1098 6 : if (tevent_req_error(req, state->vfs_aio_state.error)) {
1099 0 : return;
1100 : }
1101 6 : tevent_req_done(req);
1102 : }
1103 :
1104 12 : static ssize_t streams_xattr_pread_recv(struct tevent_req *req,
1105 : struct vfs_aio_state *vfs_aio_state)
1106 : {
1107 12 : struct streams_xattr_pread_state *state = tevent_req_data(
1108 : req, struct streams_xattr_pread_state);
1109 :
1110 12 : if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1111 0 : return -1;
1112 : }
1113 :
1114 12 : *vfs_aio_state = state->vfs_aio_state;
1115 12 : return state->nread;
1116 : }
1117 :
1118 : struct streams_xattr_pwrite_state {
1119 : ssize_t nwritten;
1120 : struct vfs_aio_state vfs_aio_state;
1121 : };
1122 :
1123 : static void streams_xattr_pwrite_done(struct tevent_req *subreq);
1124 :
1125 50 : static struct tevent_req *streams_xattr_pwrite_send(
1126 : struct vfs_handle_struct *handle,
1127 : TALLOC_CTX *mem_ctx,
1128 : struct tevent_context *ev,
1129 : struct files_struct *fsp,
1130 : const void *data,
1131 : size_t n, off_t offset)
1132 : {
1133 50 : struct tevent_req *req = NULL;
1134 50 : struct tevent_req *subreq = NULL;
1135 50 : struct streams_xattr_pwrite_state *state = NULL;
1136 : struct stream_io *sio =
1137 50 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1138 :
1139 50 : req = tevent_req_create(mem_ctx, &state,
1140 : struct streams_xattr_pwrite_state);
1141 50 : if (req == NULL) {
1142 0 : return NULL;
1143 : }
1144 :
1145 50 : if (sio == NULL) {
1146 44 : subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp,
1147 : data, n, offset);
1148 44 : if (tevent_req_nomem(req, subreq)) {
1149 0 : return tevent_req_post(req, ev);
1150 : }
1151 44 : tevent_req_set_callback(subreq, streams_xattr_pwrite_done, req);
1152 44 : return req;
1153 : }
1154 :
1155 6 : state->nwritten = SMB_VFS_PWRITE(fsp, data, n, offset);
1156 6 : if (state->nwritten != n) {
1157 0 : if (state->nwritten != -1) {
1158 0 : errno = EIO;
1159 : }
1160 0 : tevent_req_error(req, errno);
1161 0 : return tevent_req_post(req, ev);
1162 : }
1163 :
1164 6 : tevent_req_done(req);
1165 6 : return tevent_req_post(req, ev);
1166 : }
1167 :
1168 44 : static void streams_xattr_pwrite_done(struct tevent_req *subreq)
1169 : {
1170 44 : struct tevent_req *req = tevent_req_callback_data(
1171 : subreq, struct tevent_req);
1172 44 : struct streams_xattr_pwrite_state *state = tevent_req_data(
1173 : req, struct streams_xattr_pwrite_state);
1174 :
1175 44 : state->nwritten = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
1176 44 : TALLOC_FREE(subreq);
1177 :
1178 44 : if (tevent_req_error(req, state->vfs_aio_state.error)) {
1179 0 : return;
1180 : }
1181 44 : tevent_req_done(req);
1182 : }
1183 :
1184 50 : static ssize_t streams_xattr_pwrite_recv(struct tevent_req *req,
1185 : struct vfs_aio_state *vfs_aio_state)
1186 : {
1187 50 : struct streams_xattr_pwrite_state *state = tevent_req_data(
1188 : req, struct streams_xattr_pwrite_state);
1189 :
1190 50 : if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1191 0 : return -1;
1192 : }
1193 :
1194 50 : *vfs_aio_state = state->vfs_aio_state;
1195 50 : return state->nwritten;
1196 : }
1197 :
1198 119 : static int streams_xattr_ftruncate(struct vfs_handle_struct *handle,
1199 : struct files_struct *fsp,
1200 : off_t offset)
1201 : {
1202 : int ret;
1203 : uint8_t *tmp;
1204 : struct ea_struct ea;
1205 : NTSTATUS status;
1206 : struct stream_io *sio =
1207 119 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1208 :
1209 119 : DEBUG(10, ("streams_xattr_ftruncate called for file %s offset %.0f\n",
1210 : fsp_str_dbg(fsp), (double)offset));
1211 :
1212 119 : if (sio == NULL) {
1213 73 : return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
1214 : }
1215 :
1216 46 : if (!streams_xattr_recheck(sio)) {
1217 0 : return -1;
1218 : }
1219 :
1220 46 : status = get_ea_value_fsp(talloc_tos(),
1221 46 : fsp->base_fsp,
1222 46 : sio->xattr_name,
1223 : &ea);
1224 46 : if (!NT_STATUS_IS_OK(status)) {
1225 0 : return -1;
1226 : }
1227 :
1228 46 : tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
1229 : offset + 1);
1230 :
1231 46 : if (tmp == NULL) {
1232 0 : TALLOC_FREE(ea.value.data);
1233 0 : errno = ENOMEM;
1234 0 : return -1;
1235 : }
1236 :
1237 : /* Did we expand ? */
1238 46 : if (ea.value.length < offset + 1) {
1239 12 : memset(&tmp[ea.value.length], '\0',
1240 12 : offset + 1 - ea.value.length);
1241 : }
1242 :
1243 46 : ea.value.data = tmp;
1244 46 : ea.value.length = offset + 1;
1245 46 : ea.value.data[offset] = 0;
1246 :
1247 46 : ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
1248 : sio->xattr_name,
1249 : ea.value.data,
1250 : ea.value.length,
1251 : 0);
1252 :
1253 46 : TALLOC_FREE(ea.value.data);
1254 :
1255 46 : if (ret == -1) {
1256 0 : return -1;
1257 : }
1258 :
1259 46 : return 0;
1260 : }
1261 :
1262 0 : static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
1263 : struct files_struct *fsp,
1264 : uint32_t mode,
1265 : off_t offset,
1266 : off_t len)
1267 : {
1268 : struct stream_io *sio =
1269 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1270 :
1271 0 : DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1272 : "len = %.0f\n",
1273 : fsp_str_dbg(fsp), (double)offset, (double)len));
1274 :
1275 0 : if (sio == NULL) {
1276 0 : return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1277 : }
1278 :
1279 0 : if (!streams_xattr_recheck(sio)) {
1280 0 : return -1;
1281 : }
1282 :
1283 : /* Let the pwrite code path handle it. */
1284 0 : errno = ENOSYS;
1285 0 : return -1;
1286 : }
1287 :
1288 1960 : static int streams_xattr_fchown(vfs_handle_struct *handle, files_struct *fsp,
1289 : uid_t uid, gid_t gid)
1290 : {
1291 : struct stream_io *sio =
1292 1960 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1293 :
1294 1960 : if (sio == NULL) {
1295 1960 : return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
1296 : }
1297 :
1298 0 : return 0;
1299 : }
1300 :
1301 123 : static int streams_xattr_fchmod(vfs_handle_struct *handle,
1302 : files_struct *fsp,
1303 : mode_t mode)
1304 : {
1305 : struct stream_io *sio =
1306 123 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1307 :
1308 123 : if (sio == NULL) {
1309 53 : return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1310 : }
1311 :
1312 70 : return 0;
1313 : }
1314 :
1315 69238 : static ssize_t streams_xattr_fgetxattr(struct vfs_handle_struct *handle,
1316 : struct files_struct *fsp,
1317 : const char *name,
1318 : void *value,
1319 : size_t size)
1320 : {
1321 : struct stream_io *sio =
1322 69238 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1323 :
1324 69238 : if (sio == NULL) {
1325 69238 : return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
1326 : }
1327 :
1328 0 : errno = ENOTSUP;
1329 0 : return -1;
1330 : }
1331 :
1332 6596 : static ssize_t streams_xattr_flistxattr(struct vfs_handle_struct *handle,
1333 : struct files_struct *fsp,
1334 : char *list,
1335 : size_t size)
1336 : {
1337 : struct stream_io *sio =
1338 6596 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1339 :
1340 6596 : if (sio == NULL) {
1341 6596 : return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
1342 : }
1343 :
1344 0 : errno = ENOTSUP;
1345 0 : return -1;
1346 : }
1347 :
1348 528 : static int streams_xattr_fremovexattr(struct vfs_handle_struct *handle,
1349 : struct files_struct *fsp,
1350 : const char *name)
1351 : {
1352 : struct stream_io *sio =
1353 528 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1354 :
1355 528 : if (sio == NULL) {
1356 528 : return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
1357 : }
1358 :
1359 0 : errno = ENOTSUP;
1360 0 : return -1;
1361 : }
1362 :
1363 4619 : static int streams_xattr_fsetxattr(struct vfs_handle_struct *handle,
1364 : struct files_struct *fsp,
1365 : const char *name,
1366 : const void *value,
1367 : size_t size,
1368 : int flags)
1369 : {
1370 : struct stream_io *sio =
1371 4619 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1372 :
1373 4619 : if (sio == NULL) {
1374 4619 : return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value,
1375 : size, flags);
1376 : }
1377 :
1378 0 : errno = ENOTSUP;
1379 0 : return -1;
1380 : }
1381 :
1382 : struct streams_xattr_fsync_state {
1383 : int ret;
1384 : struct vfs_aio_state vfs_aio_state;
1385 : };
1386 :
1387 : static void streams_xattr_fsync_done(struct tevent_req *subreq);
1388 :
1389 6 : static struct tevent_req *streams_xattr_fsync_send(
1390 : struct vfs_handle_struct *handle,
1391 : TALLOC_CTX *mem_ctx,
1392 : struct tevent_context *ev,
1393 : struct files_struct *fsp)
1394 : {
1395 6 : struct tevent_req *req = NULL;
1396 6 : struct tevent_req *subreq = NULL;
1397 6 : struct streams_xattr_fsync_state *state = NULL;
1398 : struct stream_io *sio =
1399 6 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1400 :
1401 6 : req = tevent_req_create(mem_ctx, &state,
1402 : struct streams_xattr_fsync_state);
1403 6 : if (req == NULL) {
1404 0 : return NULL;
1405 : }
1406 :
1407 6 : if (sio == NULL) {
1408 6 : subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
1409 6 : if (tevent_req_nomem(req, subreq)) {
1410 0 : return tevent_req_post(req, ev);
1411 : }
1412 6 : tevent_req_set_callback(subreq, streams_xattr_fsync_done, req);
1413 6 : return req;
1414 : }
1415 :
1416 : /*
1417 : * There's no pathname based sync variant and we don't have access to
1418 : * the basefile handle, so we can't do anything here.
1419 : */
1420 :
1421 0 : tevent_req_done(req);
1422 0 : return tevent_req_post(req, ev);
1423 : }
1424 :
1425 6 : static void streams_xattr_fsync_done(struct tevent_req *subreq)
1426 : {
1427 6 : struct tevent_req *req = tevent_req_callback_data(
1428 : subreq, struct tevent_req);
1429 6 : struct streams_xattr_fsync_state *state = tevent_req_data(
1430 : req, struct streams_xattr_fsync_state);
1431 :
1432 6 : state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->vfs_aio_state);
1433 6 : TALLOC_FREE(subreq);
1434 6 : if (state->ret != 0) {
1435 0 : tevent_req_error(req, errno);
1436 0 : return;
1437 : }
1438 :
1439 6 : tevent_req_done(req);
1440 : }
1441 :
1442 6 : static int streams_xattr_fsync_recv(struct tevent_req *req,
1443 : struct vfs_aio_state *vfs_aio_state)
1444 : {
1445 6 : struct streams_xattr_fsync_state *state = tevent_req_data(
1446 : req, struct streams_xattr_fsync_state);
1447 :
1448 6 : if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1449 0 : return -1;
1450 : }
1451 :
1452 6 : *vfs_aio_state = state->vfs_aio_state;
1453 6 : return state->ret;
1454 : }
1455 :
1456 1330 : static bool streams_xattr_lock(vfs_handle_struct *handle,
1457 : files_struct *fsp,
1458 : int op,
1459 : off_t offset,
1460 : off_t count,
1461 : int type)
1462 : {
1463 : struct stream_io *sio =
1464 1330 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1465 :
1466 1330 : if (sio == NULL) {
1467 1330 : return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
1468 : }
1469 :
1470 0 : return true;
1471 : }
1472 :
1473 5366 : static bool streams_xattr_getlock(vfs_handle_struct *handle,
1474 : files_struct *fsp,
1475 : off_t *poffset,
1476 : off_t *pcount,
1477 : int *ptype,
1478 : pid_t *ppid)
1479 : {
1480 : struct stream_io *sio =
1481 5366 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1482 :
1483 5366 : if (sio == NULL) {
1484 5366 : return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset,
1485 : pcount, ptype, ppid);
1486 : }
1487 :
1488 0 : errno = ENOTSUP;
1489 0 : return false;
1490 : }
1491 :
1492 0 : static int streams_xattr_filesystem_sharemode(vfs_handle_struct *handle,
1493 : files_struct *fsp,
1494 : uint32_t share_access,
1495 : uint32_t access_mask)
1496 : {
1497 : struct stream_io *sio =
1498 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1499 :
1500 0 : if (sio == NULL) {
1501 0 : return SMB_VFS_NEXT_FILESYSTEM_SHAREMODE(handle,
1502 : fsp,
1503 : share_access,
1504 : access_mask);
1505 : }
1506 :
1507 0 : return 0;
1508 : }
1509 :
1510 14 : static int streams_xattr_linux_setlease(vfs_handle_struct *handle,
1511 : files_struct *fsp,
1512 : int leasetype)
1513 : {
1514 : struct stream_io *sio =
1515 14 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1516 :
1517 14 : if (sio == NULL) {
1518 12 : return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
1519 : }
1520 :
1521 2 : return 0;
1522 : }
1523 :
1524 2839 : static bool streams_xattr_strict_lock_check(struct vfs_handle_struct *handle,
1525 : files_struct *fsp,
1526 : struct lock_struct *plock)
1527 : {
1528 : struct stream_io *sio =
1529 2839 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1530 :
1531 2839 : if (sio == NULL) {
1532 2424 : return SMB_VFS_NEXT_STRICT_LOCK_CHECK(handle, fsp, plock);
1533 : }
1534 :
1535 415 : return true;
1536 : }
1537 :
1538 8582 : static int streams_xattr_fcntl(vfs_handle_struct *handle,
1539 : files_struct *fsp,
1540 : int cmd,
1541 : va_list cmd_arg)
1542 : {
1543 : va_list dup_cmd_arg;
1544 : void *arg;
1545 : int ret;
1546 :
1547 8582 : if (fsp_is_alternate_stream(fsp)) {
1548 4758 : switch (cmd) {
1549 4758 : case F_GETFL:
1550 : case F_SETFL:
1551 4758 : break;
1552 0 : default:
1553 0 : DBG_ERR("Unsupported fcntl() cmd [%d] on [%s]\n",
1554 : cmd, fsp_str_dbg(fsp));
1555 0 : errno = EINVAL;
1556 0 : return -1;
1557 : }
1558 : }
1559 :
1560 8582 : va_copy(dup_cmd_arg, cmd_arg);
1561 8582 : arg = va_arg(dup_cmd_arg, void *);
1562 :
1563 8582 : ret = SMB_VFS_NEXT_FCNTL(handle, fsp, cmd, arg);
1564 :
1565 8582 : va_end(dup_cmd_arg);
1566 :
1567 8582 : return ret;
1568 : }
1569 :
1570 : static struct vfs_fn_pointers vfs_streams_xattr_fns = {
1571 : .fs_capabilities_fn = streams_xattr_fs_capabilities,
1572 : .connect_fn = streams_xattr_connect,
1573 : .openat_fn = streams_xattr_openat,
1574 : .close_fn = streams_xattr_close,
1575 : .stat_fn = streams_xattr_stat,
1576 : .fstat_fn = streams_xattr_fstat,
1577 : .lstat_fn = streams_xattr_lstat,
1578 : .pread_fn = streams_xattr_pread,
1579 : .pwrite_fn = streams_xattr_pwrite,
1580 : .pread_send_fn = streams_xattr_pread_send,
1581 : .pread_recv_fn = streams_xattr_pread_recv,
1582 : .pwrite_send_fn = streams_xattr_pwrite_send,
1583 : .pwrite_recv_fn = streams_xattr_pwrite_recv,
1584 : .unlinkat_fn = streams_xattr_unlinkat,
1585 : .renameat_fn = streams_xattr_renameat,
1586 : .ftruncate_fn = streams_xattr_ftruncate,
1587 : .fallocate_fn = streams_xattr_fallocate,
1588 : .fstreaminfo_fn = streams_xattr_fstreaminfo,
1589 :
1590 : .fsync_send_fn = streams_xattr_fsync_send,
1591 : .fsync_recv_fn = streams_xattr_fsync_recv,
1592 :
1593 : .lock_fn = streams_xattr_lock,
1594 : .getlock_fn = streams_xattr_getlock,
1595 : .filesystem_sharemode_fn = streams_xattr_filesystem_sharemode,
1596 : .linux_setlease_fn = streams_xattr_linux_setlease,
1597 : .strict_lock_check_fn = streams_xattr_strict_lock_check,
1598 : .fcntl_fn = streams_xattr_fcntl,
1599 :
1600 : .fchown_fn = streams_xattr_fchown,
1601 : .fchmod_fn = streams_xattr_fchmod,
1602 :
1603 : .fgetxattr_fn = streams_xattr_fgetxattr,
1604 : .flistxattr_fn = streams_xattr_flistxattr,
1605 : .fremovexattr_fn = streams_xattr_fremovexattr,
1606 : .fsetxattr_fn = streams_xattr_fsetxattr,
1607 : };
1608 :
1609 : static_decl_vfs;
1610 378 : NTSTATUS vfs_streams_xattr_init(TALLOC_CTX *ctx)
1611 : {
1612 378 : return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
1613 : &vfs_streams_xattr_fns);
1614 : }
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