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 36 : 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 36 : status = get_ea_value_fsp(talloc_tos(),
56 : fsp,
57 : xattr_name,
58 : &ea);
59 36 : if (!NT_STATUS_IS_OK(status)) {
60 0 : return -1;
61 : }
62 :
63 36 : result = ea.value.length-1;
64 36 : TALLOC_FREE(ea.value.data);
65 36 : 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 32 : 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 : char *sname;
78 : char *stype;
79 : struct streams_xattr_config *config;
80 :
81 32 : SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
82 : return NT_STATUS_UNSUCCESSFUL);
83 :
84 32 : sname = talloc_strdup(ctx, stream_name + 1);
85 32 : if (sname == NULL) {
86 0 : return NT_STATUS_NO_MEMORY;
87 : }
88 :
89 : /*
90 : * With vfs_fruit option "fruit:encoding = native" we're
91 : * already converting stream names that contain illegal NTFS
92 : * characters from their on-the-wire Unicode Private Range
93 : * encoding to their native ASCII representation.
94 : *
95 : * As as result the name of xattrs storing the streams (via
96 : * vfs_streams_xattr) may contain a colon, so we have to use
97 : * strrchr_m() instead of strchr_m() for matching the stream
98 : * type suffix.
99 : *
100 : * In check_path_syntax() we've already ensured the streamname
101 : * we got from the client is valid.
102 : */
103 32 : stype = strrchr_m(sname, ':');
104 :
105 32 : if (stype) {
106 : /*
107 : * We only support one stream type: "$DATA"
108 : */
109 12 : if (strcasecmp_m(stype, ":$DATA") != 0) {
110 0 : talloc_free(sname);
111 0 : return NT_STATUS_INVALID_PARAMETER;
112 : }
113 :
114 : /* Split name and type */
115 12 : stype[0] = '\0';
116 : }
117 :
118 32 : *xattr_name = talloc_asprintf(ctx, "%s%s%s",
119 : config->prefix,
120 : sname,
121 32 : config->store_stream_type ? ":$DATA" : "");
122 32 : if (*xattr_name == NULL) {
123 0 : talloc_free(sname);
124 0 : return NT_STATUS_NO_MEMORY;
125 : }
126 :
127 32 : DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name,
128 : stream_name));
129 :
130 32 : talloc_free(sname);
131 32 : return NT_STATUS_OK;
132 : }
133 :
134 40 : static bool streams_xattr_recheck(struct stream_io *sio)
135 : {
136 : NTSTATUS status;
137 40 : char *xattr_name = NULL;
138 :
139 40 : if (sio->fsp->fsp_name == sio->fsp_name_ptr) {
140 40 : return true;
141 : }
142 :
143 0 : if (sio->fsp->fsp_name->stream_name == NULL) {
144 : /* how can this happen */
145 0 : errno = EINVAL;
146 0 : return false;
147 : }
148 :
149 0 : status = streams_xattr_get_name(sio->handle, talloc_tos(),
150 0 : sio->fsp->fsp_name->stream_name,
151 : &xattr_name);
152 0 : if (!NT_STATUS_IS_OK(status)) {
153 0 : return false;
154 : }
155 :
156 0 : TALLOC_FREE(sio->xattr_name);
157 0 : TALLOC_FREE(sio->base);
158 0 : sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
159 : xattr_name);
160 0 : if (sio->xattr_name == NULL) {
161 0 : DBG_DEBUG("sio->xattr_name==NULL\n");
162 0 : return false;
163 : }
164 0 : TALLOC_FREE(xattr_name);
165 :
166 0 : sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
167 0 : sio->fsp->fsp_name->base_name);
168 0 : if (sio->base == NULL) {
169 0 : DBG_DEBUG("sio->base==NULL\n");
170 0 : return false;
171 : }
172 :
173 0 : sio->fsp_name_ptr = sio->fsp->fsp_name;
174 :
175 0 : return true;
176 : }
177 :
178 340 : static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
179 : SMB_STRUCT_STAT *sbuf)
180 : {
181 340 : int ret = -1;
182 170 : struct stream_io *io = (struct stream_io *)
183 170 : VFS_FETCH_FSP_EXTENSION(handle, fsp);
184 :
185 340 : if (io == NULL || !fsp_is_alternate_stream(fsp)) {
186 304 : return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
187 : }
188 :
189 36 : DBG_DEBUG("streams_xattr_fstat called for %s\n", fsp_str_dbg(io->fsp));
190 :
191 36 : if (!streams_xattr_recheck(io)) {
192 0 : return -1;
193 : }
194 :
195 36 : ret = SMB_VFS_NEXT_FSTAT(handle, fsp->base_fsp, sbuf);
196 36 : if (ret == -1) {
197 0 : return -1;
198 : }
199 :
200 54 : sbuf->st_ex_size = get_xattr_size_fsp(fsp->base_fsp,
201 36 : io->xattr_name);
202 36 : if (sbuf->st_ex_size == -1) {
203 0 : SET_STAT_INVALID(*sbuf);
204 0 : return -1;
205 : }
206 :
207 36 : DEBUG(10, ("sbuf->st_ex_size = %d\n", (int)sbuf->st_ex_size));
208 :
209 36 : sbuf->st_ex_ino = hash_inode(sbuf, io->xattr_name);
210 36 : sbuf->st_ex_mode &= ~S_IFMT;
211 36 : sbuf->st_ex_mode &= ~S_IFDIR;
212 36 : sbuf->st_ex_mode |= S_IFREG;
213 36 : sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
214 :
215 36 : return 0;
216 : }
217 :
218 76 : static int streams_xattr_stat(vfs_handle_struct *handle,
219 : struct smb_filename *smb_fname)
220 : {
221 : NTSTATUS status;
222 76 : int result = -1;
223 76 : char *xattr_name = NULL;
224 76 : char *tmp_stream_name = NULL;
225 76 : struct smb_filename *pathref = NULL;
226 76 : struct files_struct *fsp = smb_fname->fsp;
227 :
228 76 : if (!is_named_stream(smb_fname)) {
229 76 : return SMB_VFS_NEXT_STAT(handle, smb_fname);
230 : }
231 :
232 : /* Note if lp_posix_paths() is true, we can never
233 : * get here as is_named_stream() is
234 : * always false. So we never need worry about
235 : * not following links here. */
236 :
237 : /* Populate the stat struct with info from the base file. */
238 0 : tmp_stream_name = smb_fname->stream_name;
239 0 : smb_fname->stream_name = NULL;
240 0 : result = SMB_VFS_NEXT_STAT(handle, smb_fname);
241 0 : smb_fname->stream_name = tmp_stream_name;
242 :
243 0 : if (result == -1) {
244 0 : return -1;
245 : }
246 :
247 : /* Derive the xattr name to lookup. */
248 0 : status = streams_xattr_get_name(handle, talloc_tos(),
249 0 : smb_fname->stream_name, &xattr_name);
250 0 : if (!NT_STATUS_IS_OK(status)) {
251 0 : errno = map_errno_from_nt_status(status);
252 0 : return -1;
253 : }
254 :
255 : /* Augment the base file's stat information before returning. */
256 0 : if (fsp == NULL) {
257 0 : status = synthetic_pathref(talloc_tos(),
258 0 : handle->conn->cwd_fsp,
259 0 : smb_fname->base_name,
260 : NULL,
261 : NULL,
262 : smb_fname->twrp,
263 : smb_fname->flags,
264 : &pathref);
265 0 : if (!NT_STATUS_IS_OK(status)) {
266 0 : TALLOC_FREE(xattr_name);
267 0 : SET_STAT_INVALID(smb_fname->st);
268 0 : errno = ENOENT;
269 0 : return -1;
270 : }
271 0 : fsp = pathref->fsp;
272 : } else {
273 0 : fsp = fsp->base_fsp;
274 : }
275 :
276 0 : smb_fname->st.st_ex_size = get_xattr_size_fsp(fsp,
277 : xattr_name);
278 0 : if (smb_fname->st.st_ex_size == -1) {
279 0 : TALLOC_FREE(xattr_name);
280 0 : TALLOC_FREE(pathref);
281 0 : SET_STAT_INVALID(smb_fname->st);
282 0 : errno = ENOENT;
283 0 : return -1;
284 : }
285 :
286 0 : smb_fname->st.st_ex_ino = hash_inode(&smb_fname->st, xattr_name);
287 0 : smb_fname->st.st_ex_mode &= ~S_IFMT;
288 0 : smb_fname->st.st_ex_mode |= S_IFREG;
289 0 : smb_fname->st.st_ex_blocks =
290 0 : smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
291 :
292 0 : TALLOC_FREE(xattr_name);
293 0 : TALLOC_FREE(pathref);
294 0 : return 0;
295 : }
296 :
297 8 : static int streams_xattr_lstat(vfs_handle_struct *handle,
298 : struct smb_filename *smb_fname)
299 : {
300 8 : if (is_named_stream(smb_fname)) {
301 : /*
302 : * There can never be EA's on a symlink.
303 : * Windows will never see a symlink, and
304 : * in SMB_FILENAME_POSIX_PATH mode we don't
305 : * allow EA's on a symlink.
306 : */
307 0 : SET_STAT_INVALID(smb_fname->st);
308 0 : errno = ENOENT;
309 0 : return -1;
310 : }
311 8 : return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
312 : }
313 :
314 224 : static int streams_xattr_openat(struct vfs_handle_struct *handle,
315 : const struct files_struct *dirfsp,
316 : const struct smb_filename *smb_fname,
317 : files_struct *fsp,
318 : const struct vfs_open_how *how)
319 : {
320 : NTSTATUS status;
321 224 : struct streams_xattr_config *config = NULL;
322 224 : struct stream_io *sio = NULL;
323 : struct ea_struct ea;
324 224 : char *xattr_name = NULL;
325 224 : int fakefd = -1;
326 224 : bool set_empty_xattr = false;
327 : int ret;
328 :
329 224 : SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
330 : return -1);
331 :
332 224 : DBG_DEBUG("called for %s with flags 0x%x\n",
333 : smb_fname_str_dbg(smb_fname),
334 : how->flags);
335 :
336 224 : if (!is_named_stream(smb_fname)) {
337 196 : return SMB_VFS_NEXT_OPENAT(handle,
338 : dirfsp,
339 : smb_fname,
340 : fsp,
341 : how);
342 : }
343 :
344 28 : if (how->resolve != 0) {
345 0 : errno = ENOSYS;
346 0 : return -1;
347 : }
348 :
349 28 : SMB_ASSERT(fsp_is_alternate_stream(fsp));
350 28 : SMB_ASSERT(dirfsp == NULL);
351 :
352 28 : status = streams_xattr_get_name(handle, talloc_tos(),
353 28 : smb_fname->stream_name, &xattr_name);
354 28 : if (!NT_STATUS_IS_OK(status)) {
355 0 : errno = map_errno_from_nt_status(status);
356 0 : goto fail;
357 : }
358 :
359 42 : status = get_ea_value_fsp(talloc_tos(),
360 28 : fsp->base_fsp,
361 : xattr_name,
362 : &ea);
363 :
364 28 : DBG_DEBUG("get_ea_value_fsp returned %s\n", nt_errstr(status));
365 :
366 28 : if (!NT_STATUS_IS_OK(status)) {
367 8 : if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
368 : /*
369 : * The base file is not there. This is an error even if
370 : * we got O_CREAT, the higher levels should have created
371 : * the base file for us.
372 : */
373 0 : DBG_DEBUG("streams_xattr_open: base file %s not around, "
374 : "returning ENOENT\n", smb_fname->base_name);
375 0 : errno = ENOENT;
376 0 : goto fail;
377 : }
378 :
379 8 : if (!(how->flags & O_CREAT)) {
380 4 : errno = ENOATTR;
381 4 : goto fail;
382 : }
383 :
384 4 : set_empty_xattr = true;
385 : }
386 :
387 24 : if (how->flags & O_TRUNC) {
388 0 : set_empty_xattr = true;
389 : }
390 :
391 24 : if (set_empty_xattr) {
392 : /*
393 : * The attribute does not exist or needs to be truncated
394 : */
395 :
396 : /*
397 : * Darn, xattrs need at least 1 byte
398 : */
399 4 : char null = '\0';
400 :
401 4 : DEBUG(10, ("creating or truncating attribute %s on file %s\n",
402 : xattr_name, smb_fname->base_name));
403 :
404 4 : ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
405 : xattr_name,
406 : &null, sizeof(null),
407 : how->flags & O_EXCL ? XATTR_CREATE : 0);
408 4 : if (ret != 0) {
409 0 : goto fail;
410 : }
411 : }
412 :
413 24 : fakefd = vfs_fake_fd();
414 :
415 24 : sio = VFS_ADD_FSP_EXTENSION(handle, fsp, struct stream_io, NULL);
416 24 : if (sio == NULL) {
417 0 : errno = ENOMEM;
418 0 : goto fail;
419 : }
420 :
421 24 : sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
422 : xattr_name);
423 24 : if (sio->xattr_name == NULL) {
424 0 : errno = ENOMEM;
425 0 : goto fail;
426 : }
427 :
428 : /*
429 : * so->base needs to be a copy of fsp->fsp_name->base_name,
430 : * making it identical to streams_xattr_recheck(). If the
431 : * open is changing directories, fsp->fsp_name->base_name
432 : * will be the full path from the share root, whilst
433 : * smb_fname will be relative to the $cwd.
434 : */
435 24 : sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
436 24 : fsp->fsp_name->base_name);
437 24 : if (sio->base == NULL) {
438 0 : errno = ENOMEM;
439 0 : goto fail;
440 : }
441 :
442 24 : sio->fsp_name_ptr = fsp->fsp_name;
443 24 : sio->handle = handle;
444 24 : sio->fsp = fsp;
445 :
446 24 : return fakefd;
447 :
448 4 : fail:
449 4 : if (fakefd >= 0) {
450 0 : vfs_fake_fd_close(fakefd);
451 0 : fakefd = -1;
452 : }
453 :
454 4 : return -1;
455 : }
456 :
457 192 : static int streams_xattr_close(vfs_handle_struct *handle,
458 : files_struct *fsp)
459 : {
460 : int ret;
461 : int fd;
462 :
463 192 : fd = fsp_get_pathref_fd(fsp);
464 :
465 192 : DBG_DEBUG("streams_xattr_close called [%s] fd [%d]\n",
466 : smb_fname_str_dbg(fsp->fsp_name), fd);
467 :
468 192 : if (!fsp_is_alternate_stream(fsp)) {
469 172 : return SMB_VFS_NEXT_CLOSE(handle, fsp);
470 : }
471 :
472 20 : ret = vfs_fake_fd_close(fd);
473 20 : fsp_set_fd(fsp, -1);
474 :
475 20 : return ret;
476 : }
477 :
478 8 : static int streams_xattr_unlinkat(vfs_handle_struct *handle,
479 : struct files_struct *dirfsp,
480 : const struct smb_filename *smb_fname,
481 : int flags)
482 : {
483 : NTSTATUS status;
484 8 : int ret = -1;
485 8 : char *xattr_name = NULL;
486 8 : struct smb_filename *pathref = NULL;
487 8 : struct files_struct *fsp = smb_fname->fsp;
488 :
489 8 : if (!is_named_stream(smb_fname)) {
490 4 : return SMB_VFS_NEXT_UNLINKAT(handle,
491 : dirfsp,
492 : smb_fname,
493 : flags);
494 : }
495 :
496 : /* A stream can never be rmdir'ed */
497 4 : SMB_ASSERT((flags & AT_REMOVEDIR) == 0);
498 :
499 4 : status = streams_xattr_get_name(handle, talloc_tos(),
500 4 : smb_fname->stream_name, &xattr_name);
501 4 : if (!NT_STATUS_IS_OK(status)) {
502 0 : errno = map_errno_from_nt_status(status);
503 0 : goto fail;
504 : }
505 :
506 4 : if (fsp == NULL) {
507 0 : status = synthetic_pathref(talloc_tos(),
508 0 : handle->conn->cwd_fsp,
509 0 : smb_fname->base_name,
510 : NULL,
511 : NULL,
512 0 : smb_fname->twrp,
513 0 : smb_fname->flags,
514 : &pathref);
515 0 : if (!NT_STATUS_IS_OK(status)) {
516 0 : errno = ENOENT;
517 0 : goto fail;
518 : }
519 0 : fsp = pathref->fsp;
520 : } else {
521 4 : SMB_ASSERT(fsp_is_alternate_stream(smb_fname->fsp));
522 4 : fsp = fsp->base_fsp;
523 : }
524 :
525 4 : ret = SMB_VFS_FREMOVEXATTR(fsp, xattr_name);
526 :
527 4 : if ((ret == -1) && (errno == ENOATTR)) {
528 0 : errno = ENOENT;
529 0 : goto fail;
530 : }
531 :
532 4 : ret = 0;
533 :
534 4 : fail:
535 4 : TALLOC_FREE(xattr_name);
536 4 : TALLOC_FREE(pathref);
537 4 : return ret;
538 : }
539 :
540 0 : static int streams_xattr_renameat(vfs_handle_struct *handle,
541 : files_struct *srcfsp,
542 : const struct smb_filename *smb_fname_src,
543 : files_struct *dstfsp,
544 : const struct smb_filename *smb_fname_dst)
545 : {
546 : NTSTATUS status;
547 0 : int ret = -1;
548 0 : char *src_xattr_name = NULL;
549 0 : char *dst_xattr_name = NULL;
550 : bool src_is_stream, dst_is_stream;
551 : ssize_t oret;
552 : ssize_t nret;
553 : struct ea_struct ea;
554 0 : struct smb_filename *pathref_src = NULL;
555 0 : struct smb_filename *pathref_dst = NULL;
556 0 : struct smb_filename *full_src = NULL;
557 0 : struct smb_filename *full_dst = NULL;
558 :
559 0 : src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
560 0 : dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
561 :
562 0 : if (!src_is_stream && !dst_is_stream) {
563 0 : return SMB_VFS_NEXT_RENAMEAT(handle,
564 : srcfsp,
565 : smb_fname_src,
566 : dstfsp,
567 : smb_fname_dst);
568 : }
569 :
570 : /* For now don't allow renames from or to the default stream. */
571 0 : if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
572 0 : is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
573 0 : errno = ENOSYS;
574 0 : goto done;
575 : }
576 :
577 : /* Don't rename if the streams are identical. */
578 0 : if (strcasecmp_m(smb_fname_src->stream_name,
579 0 : smb_fname_dst->stream_name) == 0) {
580 0 : goto done;
581 : }
582 :
583 : /* Get the xattr names. */
584 0 : status = streams_xattr_get_name(handle, talloc_tos(),
585 0 : smb_fname_src->stream_name,
586 : &src_xattr_name);
587 0 : if (!NT_STATUS_IS_OK(status)) {
588 0 : errno = map_errno_from_nt_status(status);
589 0 : goto fail;
590 : }
591 0 : status = streams_xattr_get_name(handle, talloc_tos(),
592 0 : smb_fname_dst->stream_name,
593 : &dst_xattr_name);
594 0 : if (!NT_STATUS_IS_OK(status)) {
595 0 : errno = map_errno_from_nt_status(status);
596 0 : goto fail;
597 : }
598 :
599 0 : full_src = full_path_from_dirfsp_atname(talloc_tos(),
600 : srcfsp,
601 : smb_fname_src);
602 0 : if (full_src == NULL) {
603 0 : errno = ENOMEM;
604 0 : goto fail;
605 : }
606 0 : full_dst = full_path_from_dirfsp_atname(talloc_tos(),
607 : dstfsp,
608 : smb_fname_dst);
609 0 : if (full_dst == NULL) {
610 0 : errno = ENOMEM;
611 0 : goto fail;
612 : }
613 :
614 : /* Get a pathref for full_src (base file, no stream name). */
615 0 : status = synthetic_pathref(talloc_tos(),
616 0 : handle->conn->cwd_fsp,
617 0 : full_src->base_name,
618 : NULL,
619 : NULL,
620 : full_src->twrp,
621 : full_src->flags,
622 : &pathref_src);
623 0 : if (!NT_STATUS_IS_OK(status)) {
624 0 : errno = ENOENT;
625 0 : goto fail;
626 : }
627 :
628 : /* Read the old stream from the base file fsp. */
629 0 : status = get_ea_value_fsp(talloc_tos(),
630 0 : pathref_src->fsp,
631 : src_xattr_name,
632 : &ea);
633 0 : if (!NT_STATUS_IS_OK(status)) {
634 0 : errno = map_errno_from_nt_status(status);
635 0 : goto fail;
636 : }
637 :
638 : /* Get a pathref for full_dst (base file, no stream name). */
639 0 : status = synthetic_pathref(talloc_tos(),
640 0 : handle->conn->cwd_fsp,
641 0 : full_dst->base_name,
642 : NULL,
643 : NULL,
644 : full_dst->twrp,
645 : full_dst->flags,
646 : &pathref_dst);
647 0 : if (!NT_STATUS_IS_OK(status)) {
648 0 : errno = ENOENT;
649 0 : goto fail;
650 : }
651 :
652 : /* (Over)write the new stream on the base file fsp. */
653 0 : nret = SMB_VFS_FSETXATTR(
654 : pathref_dst->fsp,
655 : dst_xattr_name,
656 : ea.value.data,
657 : ea.value.length,
658 : 0);
659 0 : if (nret < 0) {
660 0 : if (errno == ENOATTR) {
661 0 : errno = ENOENT;
662 : }
663 0 : goto fail;
664 : }
665 :
666 : /*
667 : * Remove the old stream from the base file fsp.
668 : */
669 0 : oret = SMB_VFS_FREMOVEXATTR(pathref_src->fsp,
670 : src_xattr_name);
671 0 : if (oret < 0) {
672 0 : if (errno == ENOATTR) {
673 0 : errno = ENOENT;
674 : }
675 0 : goto fail;
676 : }
677 :
678 0 : done:
679 0 : errno = 0;
680 0 : ret = 0;
681 0 : fail:
682 0 : TALLOC_FREE(pathref_src);
683 0 : TALLOC_FREE(pathref_dst);
684 0 : TALLOC_FREE(full_src);
685 0 : TALLOC_FREE(full_dst);
686 0 : TALLOC_FREE(src_xattr_name);
687 0 : TALLOC_FREE(dst_xattr_name);
688 0 : return ret;
689 : }
690 :
691 12 : static NTSTATUS walk_xattr_streams(vfs_handle_struct *handle,
692 : files_struct *fsp,
693 : const struct smb_filename *smb_fname,
694 : bool (*fn)(struct ea_struct *ea,
695 : void *private_data),
696 : void *private_data)
697 : {
698 : NTSTATUS status;
699 : char **names;
700 : size_t i, num_names;
701 : struct streams_xattr_config *config;
702 :
703 12 : SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
704 : return NT_STATUS_UNSUCCESSFUL);
705 :
706 12 : status = get_ea_names_from_fsp(talloc_tos(),
707 12 : smb_fname->fsp,
708 : &names,
709 : &num_names);
710 12 : if (!NT_STATUS_IS_OK(status)) {
711 0 : return status;
712 : }
713 :
714 32 : for (i=0; i<num_names; i++) {
715 : struct ea_struct ea;
716 :
717 : /*
718 : * We want to check with samba_private_attr_name()
719 : * whether the xattr name is a private one,
720 : * unfortunately it flags xattrs that begin with the
721 : * default streams prefix as private.
722 : *
723 : * By only calling samba_private_attr_name() in case
724 : * the xattr does NOT begin with the default prefix,
725 : * we know that if it returns 'true' it definitely one
726 : * of our internal xattr like "user.DOSATTRIB".
727 : */
728 20 : if (strncasecmp_m(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
729 : strlen(SAMBA_XATTR_DOSSTREAM_PREFIX)) != 0) {
730 12 : if (samba_private_attr_name(names[i])) {
731 18 : continue;
732 : }
733 : }
734 :
735 8 : if (strncmp(names[i], config->prefix,
736 : config->prefix_len) != 0) {
737 0 : continue;
738 : }
739 :
740 12 : status = get_ea_value_fsp(names,
741 8 : smb_fname->fsp,
742 8 : names[i],
743 : &ea);
744 8 : if (!NT_STATUS_IS_OK(status)) {
745 0 : DEBUG(10, ("Could not get ea %s for file %s: %s\n",
746 : names[i],
747 : smb_fname->base_name,
748 : nt_errstr(status)));
749 0 : continue;
750 : }
751 :
752 16 : ea.name = talloc_asprintf(
753 8 : ea.value.data, ":%s%s",
754 8 : names[i] + config->prefix_len,
755 8 : config->store_stream_type ? "" : ":$DATA");
756 8 : if (ea.name == NULL) {
757 0 : DEBUG(0, ("talloc failed\n"));
758 0 : continue;
759 : }
760 :
761 8 : if (!fn(&ea, private_data)) {
762 0 : TALLOC_FREE(ea.value.data);
763 0 : return NT_STATUS_OK;
764 : }
765 :
766 8 : TALLOC_FREE(ea.value.data);
767 : }
768 :
769 12 : TALLOC_FREE(names);
770 12 : return NT_STATUS_OK;
771 : }
772 :
773 8 : static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
774 : struct stream_struct **streams,
775 : const char *name, off_t size,
776 : off_t alloc_size)
777 : {
778 : struct stream_struct *tmp;
779 :
780 8 : tmp = talloc_realloc(mem_ctx, *streams, struct stream_struct,
781 : (*num_streams)+1);
782 8 : if (tmp == NULL) {
783 0 : return false;
784 : }
785 :
786 8 : tmp[*num_streams].name = talloc_strdup(tmp, name);
787 8 : if (tmp[*num_streams].name == NULL) {
788 0 : return false;
789 : }
790 :
791 8 : tmp[*num_streams].size = size;
792 8 : tmp[*num_streams].alloc_size = alloc_size;
793 :
794 8 : *streams = tmp;
795 8 : *num_streams += 1;
796 8 : return true;
797 : }
798 :
799 : struct streaminfo_state {
800 : TALLOC_CTX *mem_ctx;
801 : vfs_handle_struct *handle;
802 : unsigned int num_streams;
803 : struct stream_struct *streams;
804 : NTSTATUS status;
805 : };
806 :
807 8 : static bool collect_one_stream(struct ea_struct *ea, void *private_data)
808 : {
809 8 : struct streaminfo_state *state =
810 : (struct streaminfo_state *)private_data;
811 :
812 16 : if (!add_one_stream(state->mem_ctx,
813 : &state->num_streams, &state->streams,
814 12 : ea->name, ea->value.length-1,
815 8 : smb_roundup(state->handle->conn,
816 8 : ea->value.length-1))) {
817 0 : state->status = NT_STATUS_NO_MEMORY;
818 0 : return false;
819 : }
820 :
821 8 : return true;
822 : }
823 :
824 12 : static NTSTATUS streams_xattr_fstreaminfo(vfs_handle_struct *handle,
825 : struct files_struct *fsp,
826 : TALLOC_CTX *mem_ctx,
827 : unsigned int *pnum_streams,
828 : struct stream_struct **pstreams)
829 : {
830 : NTSTATUS status;
831 : struct streaminfo_state state;
832 :
833 12 : state.streams = *pstreams;
834 12 : state.num_streams = *pnum_streams;
835 12 : state.mem_ctx = mem_ctx;
836 12 : state.handle = handle;
837 12 : state.status = NT_STATUS_OK;
838 :
839 12 : status = walk_xattr_streams(handle,
840 : fsp,
841 12 : fsp->fsp_name,
842 : collect_one_stream,
843 : &state);
844 :
845 12 : if (!NT_STATUS_IS_OK(status)) {
846 0 : TALLOC_FREE(state.streams);
847 0 : return status;
848 : }
849 :
850 12 : if (!NT_STATUS_IS_OK(state.status)) {
851 0 : TALLOC_FREE(state.streams);
852 0 : return state.status;
853 : }
854 :
855 12 : *pnum_streams = state.num_streams;
856 12 : *pstreams = state.streams;
857 :
858 12 : return SMB_VFS_NEXT_FSTREAMINFO(handle,
859 : fsp,
860 : mem_ctx,
861 : pnum_streams,
862 : pstreams);
863 : }
864 :
865 4 : static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle,
866 : enum timestamp_set_resolution *p_ts_res)
867 : {
868 4 : return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
869 : }
870 :
871 4 : static int streams_xattr_connect(vfs_handle_struct *handle,
872 : const char *service, const char *user)
873 : {
874 : struct streams_xattr_config *config;
875 4 : const char *default_prefix = SAMBA_XATTR_DOSSTREAM_PREFIX;
876 : const char *prefix;
877 : int rc;
878 :
879 4 : rc = SMB_VFS_NEXT_CONNECT(handle, service, user);
880 4 : if (rc != 0) {
881 0 : return rc;
882 : }
883 :
884 4 : config = talloc_zero(handle->conn, struct streams_xattr_config);
885 4 : if (config == NULL) {
886 0 : DEBUG(1, ("talloc_zero() failed\n"));
887 0 : errno = ENOMEM;
888 0 : return -1;
889 : }
890 :
891 4 : prefix = lp_parm_const_string(SNUM(handle->conn),
892 : "streams_xattr", "prefix",
893 : default_prefix);
894 4 : config->prefix = talloc_strdup(config, prefix);
895 4 : if (config->prefix == NULL) {
896 0 : DEBUG(1, ("talloc_strdup() failed\n"));
897 0 : errno = ENOMEM;
898 0 : return -1;
899 : }
900 4 : config->prefix_len = strlen(config->prefix);
901 4 : DEBUG(10, ("streams_xattr using stream prefix: %s\n", config->prefix));
902 :
903 4 : config->store_stream_type = lp_parm_bool(SNUM(handle->conn),
904 : "streams_xattr",
905 : "store_stream_type",
906 : true);
907 :
908 4 : SMB_VFS_HANDLE_SET_DATA(handle, config,
909 : NULL, struct stream_xattr_config,
910 : return -1);
911 :
912 4 : return 0;
913 : }
914 :
915 4 : static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
916 : files_struct *fsp, const void *data,
917 : size_t n, off_t offset)
918 : {
919 2 : struct stream_io *sio =
920 2 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
921 : struct ea_struct ea;
922 : NTSTATUS status;
923 : int ret;
924 :
925 4 : DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
926 :
927 4 : if (sio == NULL) {
928 0 : return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
929 : }
930 :
931 4 : if (!streams_xattr_recheck(sio)) {
932 0 : return -1;
933 : }
934 :
935 4 : if ((offset + n) >= lp_smbd_max_xattr_size(SNUM(handle->conn))) {
936 : /*
937 : * Requested write is beyond what can be read based on
938 : * samba configuration.
939 : * ReFS returns STATUS_FILESYSTEM_LIMITATION, which causes
940 : * entire file to be skipped by File Explorer. VFAT returns
941 : * NT_STATUS_OBJECT_NAME_COLLISION causes user to be prompted
942 : * to skip writing metadata, but copy data.
943 : */
944 0 : DBG_ERR("Write to xattr [%s] on file [%s] exceeds maximum "
945 : "supported extended attribute size. "
946 : "Depending on filesystem type and operating system "
947 : "(OS) specifics, this value may be increased using "
948 : "the value of the parameter: "
949 : "smbd max xattr size = <bytes>. Consult OS and "
950 : "filesystem manpages prior to increasing this limit.\n",
951 : sio->xattr_name, sio->base);
952 0 : errno = EOVERFLOW;
953 0 : return -1;
954 : }
955 :
956 4 : status = get_ea_value_fsp(talloc_tos(),
957 4 : fsp->base_fsp,
958 4 : sio->xattr_name,
959 : &ea);
960 4 : if (!NT_STATUS_IS_OK(status)) {
961 0 : return -1;
962 : }
963 :
964 4 : if ((offset + n) > ea.value.length-1) {
965 : uint8_t *tmp;
966 4 : size_t new_sz = offset + n + 1;
967 :
968 4 : tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
969 : new_sz);
970 :
971 4 : if (tmp == NULL) {
972 0 : TALLOC_FREE(ea.value.data);
973 0 : errno = ENOMEM;
974 0 : return -1;
975 : }
976 :
977 4 : memset(tmp + ea.value.length, 0, new_sz - ea.value.length);
978 4 : ea.value.data = tmp;
979 4 : ea.value.length = offset + n + 1;
980 4 : ea.value.data[offset+n] = 0;
981 : }
982 :
983 4 : memcpy(ea.value.data + offset, data, n);
984 :
985 4 : ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
986 : sio->xattr_name,
987 : ea.value.data,
988 : ea.value.length,
989 : 0);
990 4 : TALLOC_FREE(ea.value.data);
991 :
992 4 : if (ret == -1) {
993 0 : return -1;
994 : }
995 :
996 4 : return n;
997 : }
998 :
999 0 : static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
1000 : files_struct *fsp, void *data,
1001 : size_t n, off_t offset)
1002 : {
1003 0 : struct stream_io *sio =
1004 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1005 : struct ea_struct ea;
1006 : NTSTATUS status;
1007 : size_t length, overlap;
1008 :
1009 0 : DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
1010 : (int)offset, (int)n));
1011 :
1012 0 : if (sio == NULL) {
1013 0 : return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
1014 : }
1015 :
1016 0 : if (!streams_xattr_recheck(sio)) {
1017 0 : return -1;
1018 : }
1019 :
1020 0 : status = get_ea_value_fsp(talloc_tos(),
1021 0 : fsp->base_fsp,
1022 0 : sio->xattr_name,
1023 : &ea);
1024 0 : if (!NT_STATUS_IS_OK(status)) {
1025 0 : return -1;
1026 : }
1027 :
1028 0 : length = ea.value.length-1;
1029 :
1030 0 : DBG_DEBUG("get_ea_value_fsp returned %d bytes\n",
1031 : (int)length);
1032 :
1033 : /* Attempt to read past EOF. */
1034 0 : if (length <= offset) {
1035 0 : return 0;
1036 : }
1037 :
1038 0 : overlap = (offset + n) > length ? (length - offset) : n;
1039 0 : memcpy(data, ea.value.data + offset, overlap);
1040 :
1041 0 : TALLOC_FREE(ea.value.data);
1042 0 : return overlap;
1043 : }
1044 :
1045 : struct streams_xattr_pread_state {
1046 : ssize_t nread;
1047 : struct vfs_aio_state vfs_aio_state;
1048 : };
1049 :
1050 : static void streams_xattr_pread_done(struct tevent_req *subreq);
1051 :
1052 0 : static struct tevent_req *streams_xattr_pread_send(
1053 : struct vfs_handle_struct *handle,
1054 : TALLOC_CTX *mem_ctx,
1055 : struct tevent_context *ev,
1056 : struct files_struct *fsp,
1057 : void *data,
1058 : size_t n, off_t offset)
1059 : {
1060 0 : struct tevent_req *req = NULL;
1061 0 : struct tevent_req *subreq = NULL;
1062 0 : struct streams_xattr_pread_state *state = NULL;
1063 0 : struct stream_io *sio =
1064 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1065 :
1066 0 : req = tevent_req_create(mem_ctx, &state,
1067 : struct streams_xattr_pread_state);
1068 0 : if (req == NULL) {
1069 0 : return NULL;
1070 : }
1071 :
1072 0 : if (sio == NULL) {
1073 0 : subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp,
1074 : data, n, offset);
1075 0 : if (tevent_req_nomem(req, subreq)) {
1076 0 : return tevent_req_post(req, ev);
1077 : }
1078 0 : tevent_req_set_callback(subreq, streams_xattr_pread_done, req);
1079 0 : return req;
1080 : }
1081 :
1082 0 : state->nread = SMB_VFS_PREAD(fsp, data, n, offset);
1083 0 : if (state->nread != n) {
1084 0 : if (state->nread != -1) {
1085 0 : errno = EIO;
1086 : }
1087 0 : tevent_req_error(req, errno);
1088 0 : return tevent_req_post(req, ev);
1089 : }
1090 :
1091 0 : tevent_req_done(req);
1092 0 : return tevent_req_post(req, ev);
1093 : }
1094 :
1095 0 : static void streams_xattr_pread_done(struct tevent_req *subreq)
1096 : {
1097 0 : struct tevent_req *req = tevent_req_callback_data(
1098 : subreq, struct tevent_req);
1099 0 : struct streams_xattr_pread_state *state = tevent_req_data(
1100 : req, struct streams_xattr_pread_state);
1101 :
1102 0 : state->nread = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
1103 0 : TALLOC_FREE(subreq);
1104 :
1105 0 : if (tevent_req_error(req, state->vfs_aio_state.error)) {
1106 0 : return;
1107 : }
1108 0 : tevent_req_done(req);
1109 : }
1110 :
1111 0 : static ssize_t streams_xattr_pread_recv(struct tevent_req *req,
1112 : struct vfs_aio_state *vfs_aio_state)
1113 : {
1114 0 : struct streams_xattr_pread_state *state = tevent_req_data(
1115 : req, struct streams_xattr_pread_state);
1116 :
1117 0 : if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1118 0 : return -1;
1119 : }
1120 :
1121 0 : *vfs_aio_state = state->vfs_aio_state;
1122 0 : return state->nread;
1123 : }
1124 :
1125 : struct streams_xattr_pwrite_state {
1126 : ssize_t nwritten;
1127 : struct vfs_aio_state vfs_aio_state;
1128 : };
1129 :
1130 : static void streams_xattr_pwrite_done(struct tevent_req *subreq);
1131 :
1132 0 : static struct tevent_req *streams_xattr_pwrite_send(
1133 : struct vfs_handle_struct *handle,
1134 : TALLOC_CTX *mem_ctx,
1135 : struct tevent_context *ev,
1136 : struct files_struct *fsp,
1137 : const void *data,
1138 : size_t n, off_t offset)
1139 : {
1140 0 : struct tevent_req *req = NULL;
1141 0 : struct tevent_req *subreq = NULL;
1142 0 : struct streams_xattr_pwrite_state *state = NULL;
1143 0 : struct stream_io *sio =
1144 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1145 :
1146 0 : req = tevent_req_create(mem_ctx, &state,
1147 : struct streams_xattr_pwrite_state);
1148 0 : if (req == NULL) {
1149 0 : return NULL;
1150 : }
1151 :
1152 0 : if (sio == NULL) {
1153 0 : subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp,
1154 : data, n, offset);
1155 0 : if (tevent_req_nomem(req, subreq)) {
1156 0 : return tevent_req_post(req, ev);
1157 : }
1158 0 : tevent_req_set_callback(subreq, streams_xattr_pwrite_done, req);
1159 0 : return req;
1160 : }
1161 :
1162 0 : state->nwritten = SMB_VFS_PWRITE(fsp, data, n, offset);
1163 0 : if (state->nwritten != n) {
1164 0 : if (state->nwritten != -1) {
1165 0 : errno = EIO;
1166 : }
1167 0 : tevent_req_error(req, errno);
1168 0 : return tevent_req_post(req, ev);
1169 : }
1170 :
1171 0 : tevent_req_done(req);
1172 0 : return tevent_req_post(req, ev);
1173 : }
1174 :
1175 0 : static void streams_xattr_pwrite_done(struct tevent_req *subreq)
1176 : {
1177 0 : struct tevent_req *req = tevent_req_callback_data(
1178 : subreq, struct tevent_req);
1179 0 : struct streams_xattr_pwrite_state *state = tevent_req_data(
1180 : req, struct streams_xattr_pwrite_state);
1181 :
1182 0 : state->nwritten = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
1183 0 : TALLOC_FREE(subreq);
1184 :
1185 0 : if (tevent_req_error(req, state->vfs_aio_state.error)) {
1186 0 : return;
1187 : }
1188 0 : tevent_req_done(req);
1189 : }
1190 :
1191 0 : static ssize_t streams_xattr_pwrite_recv(struct tevent_req *req,
1192 : struct vfs_aio_state *vfs_aio_state)
1193 : {
1194 0 : struct streams_xattr_pwrite_state *state = tevent_req_data(
1195 : req, struct streams_xattr_pwrite_state);
1196 :
1197 0 : if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1198 0 : return -1;
1199 : }
1200 :
1201 0 : *vfs_aio_state = state->vfs_aio_state;
1202 0 : return state->nwritten;
1203 : }
1204 :
1205 0 : static int streams_xattr_ftruncate(struct vfs_handle_struct *handle,
1206 : struct files_struct *fsp,
1207 : off_t offset)
1208 : {
1209 : int ret;
1210 : uint8_t *tmp;
1211 : struct ea_struct ea;
1212 : NTSTATUS status;
1213 0 : struct stream_io *sio =
1214 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1215 :
1216 0 : DEBUG(10, ("streams_xattr_ftruncate called for file %s offset %.0f\n",
1217 : fsp_str_dbg(fsp), (double)offset));
1218 :
1219 0 : if (sio == NULL) {
1220 0 : return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
1221 : }
1222 :
1223 0 : if (!streams_xattr_recheck(sio)) {
1224 0 : return -1;
1225 : }
1226 :
1227 0 : status = get_ea_value_fsp(talloc_tos(),
1228 0 : fsp->base_fsp,
1229 0 : sio->xattr_name,
1230 : &ea);
1231 0 : if (!NT_STATUS_IS_OK(status)) {
1232 0 : return -1;
1233 : }
1234 :
1235 0 : tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
1236 : offset + 1);
1237 :
1238 0 : if (tmp == NULL) {
1239 0 : TALLOC_FREE(ea.value.data);
1240 0 : errno = ENOMEM;
1241 0 : return -1;
1242 : }
1243 :
1244 : /* Did we expand ? */
1245 0 : if (ea.value.length < offset + 1) {
1246 0 : memset(&tmp[ea.value.length], '\0',
1247 0 : offset + 1 - ea.value.length);
1248 : }
1249 :
1250 0 : ea.value.data = tmp;
1251 0 : ea.value.length = offset + 1;
1252 0 : ea.value.data[offset] = 0;
1253 :
1254 0 : ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
1255 : sio->xattr_name,
1256 : ea.value.data,
1257 : ea.value.length,
1258 : 0);
1259 :
1260 0 : TALLOC_FREE(ea.value.data);
1261 :
1262 0 : if (ret == -1) {
1263 0 : return -1;
1264 : }
1265 :
1266 0 : return 0;
1267 : }
1268 :
1269 0 : static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
1270 : struct files_struct *fsp,
1271 : uint32_t mode,
1272 : off_t offset,
1273 : off_t len)
1274 : {
1275 0 : struct stream_io *sio =
1276 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1277 :
1278 0 : DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1279 : "len = %.0f\n",
1280 : fsp_str_dbg(fsp), (double)offset, (double)len));
1281 :
1282 0 : if (sio == NULL) {
1283 0 : return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1284 : }
1285 :
1286 0 : if (!streams_xattr_recheck(sio)) {
1287 0 : return -1;
1288 : }
1289 :
1290 : /* Let the pwrite code path handle it. */
1291 0 : errno = ENOSYS;
1292 0 : return -1;
1293 : }
1294 :
1295 0 : static int streams_xattr_fchown(vfs_handle_struct *handle, files_struct *fsp,
1296 : uid_t uid, gid_t gid)
1297 : {
1298 0 : struct stream_io *sio =
1299 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1300 :
1301 0 : if (sio == NULL) {
1302 0 : return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
1303 : }
1304 :
1305 0 : return 0;
1306 : }
1307 :
1308 0 : static int streams_xattr_fchmod(vfs_handle_struct *handle,
1309 : files_struct *fsp,
1310 : mode_t mode)
1311 : {
1312 0 : struct stream_io *sio =
1313 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1314 :
1315 0 : if (sio == NULL) {
1316 0 : return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1317 : }
1318 :
1319 0 : return 0;
1320 : }
1321 :
1322 244 : static ssize_t streams_xattr_fgetxattr(struct vfs_handle_struct *handle,
1323 : struct files_struct *fsp,
1324 : const char *name,
1325 : void *value,
1326 : size_t size)
1327 : {
1328 122 : struct stream_io *sio =
1329 122 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1330 :
1331 244 : if (sio == NULL) {
1332 244 : return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
1333 : }
1334 :
1335 0 : errno = ENOTSUP;
1336 0 : return -1;
1337 : }
1338 :
1339 40 : static ssize_t streams_xattr_flistxattr(struct vfs_handle_struct *handle,
1340 : struct files_struct *fsp,
1341 : char *list,
1342 : size_t size)
1343 : {
1344 20 : struct stream_io *sio =
1345 20 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1346 :
1347 40 : if (sio == NULL) {
1348 40 : return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
1349 : }
1350 :
1351 0 : errno = ENOTSUP;
1352 0 : return -1;
1353 : }
1354 :
1355 4 : static int streams_xattr_fremovexattr(struct vfs_handle_struct *handle,
1356 : struct files_struct *fsp,
1357 : const char *name)
1358 : {
1359 2 : struct stream_io *sio =
1360 2 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1361 :
1362 4 : if (sio == NULL) {
1363 4 : return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
1364 : }
1365 :
1366 0 : errno = ENOTSUP;
1367 0 : return -1;
1368 : }
1369 :
1370 20 : static int streams_xattr_fsetxattr(struct vfs_handle_struct *handle,
1371 : struct files_struct *fsp,
1372 : const char *name,
1373 : const void *value,
1374 : size_t size,
1375 : int flags)
1376 : {
1377 10 : struct stream_io *sio =
1378 10 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1379 :
1380 20 : if (sio == NULL) {
1381 20 : return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value,
1382 : size, flags);
1383 : }
1384 :
1385 0 : errno = ENOTSUP;
1386 0 : return -1;
1387 : }
1388 :
1389 : struct streams_xattr_fsync_state {
1390 : int ret;
1391 : struct vfs_aio_state vfs_aio_state;
1392 : };
1393 :
1394 : static void streams_xattr_fsync_done(struct tevent_req *subreq);
1395 :
1396 0 : static struct tevent_req *streams_xattr_fsync_send(
1397 : struct vfs_handle_struct *handle,
1398 : TALLOC_CTX *mem_ctx,
1399 : struct tevent_context *ev,
1400 : struct files_struct *fsp)
1401 : {
1402 0 : struct tevent_req *req = NULL;
1403 0 : struct tevent_req *subreq = NULL;
1404 0 : struct streams_xattr_fsync_state *state = NULL;
1405 0 : struct stream_io *sio =
1406 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1407 :
1408 0 : req = tevent_req_create(mem_ctx, &state,
1409 : struct streams_xattr_fsync_state);
1410 0 : if (req == NULL) {
1411 0 : return NULL;
1412 : }
1413 :
1414 0 : if (sio == NULL) {
1415 0 : subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
1416 0 : if (tevent_req_nomem(req, subreq)) {
1417 0 : return tevent_req_post(req, ev);
1418 : }
1419 0 : tevent_req_set_callback(subreq, streams_xattr_fsync_done, req);
1420 0 : return req;
1421 : }
1422 :
1423 : /*
1424 : * There's no pathname based sync variant and we don't have access to
1425 : * the basefile handle, so we can't do anything here.
1426 : */
1427 :
1428 0 : tevent_req_done(req);
1429 0 : return tevent_req_post(req, ev);
1430 : }
1431 :
1432 0 : static void streams_xattr_fsync_done(struct tevent_req *subreq)
1433 : {
1434 0 : struct tevent_req *req = tevent_req_callback_data(
1435 : subreq, struct tevent_req);
1436 0 : struct streams_xattr_fsync_state *state = tevent_req_data(
1437 : req, struct streams_xattr_fsync_state);
1438 :
1439 0 : state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->vfs_aio_state);
1440 0 : TALLOC_FREE(subreq);
1441 0 : if (state->ret != 0) {
1442 0 : tevent_req_error(req, errno);
1443 0 : return;
1444 : }
1445 :
1446 0 : tevent_req_done(req);
1447 : }
1448 :
1449 0 : static int streams_xattr_fsync_recv(struct tevent_req *req,
1450 : struct vfs_aio_state *vfs_aio_state)
1451 : {
1452 0 : struct streams_xattr_fsync_state *state = tevent_req_data(
1453 : req, struct streams_xattr_fsync_state);
1454 :
1455 0 : if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1456 0 : return -1;
1457 : }
1458 :
1459 0 : *vfs_aio_state = state->vfs_aio_state;
1460 0 : return state->ret;
1461 : }
1462 :
1463 0 : static bool streams_xattr_lock(vfs_handle_struct *handle,
1464 : files_struct *fsp,
1465 : int op,
1466 : off_t offset,
1467 : off_t count,
1468 : int type)
1469 : {
1470 0 : struct stream_io *sio =
1471 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1472 :
1473 0 : if (sio == NULL) {
1474 0 : return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
1475 : }
1476 :
1477 0 : return true;
1478 : }
1479 :
1480 0 : static bool streams_xattr_getlock(vfs_handle_struct *handle,
1481 : files_struct *fsp,
1482 : off_t *poffset,
1483 : off_t *pcount,
1484 : int *ptype,
1485 : pid_t *ppid)
1486 : {
1487 0 : struct stream_io *sio =
1488 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1489 :
1490 0 : if (sio == NULL) {
1491 0 : return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset,
1492 : pcount, ptype, ppid);
1493 : }
1494 :
1495 0 : errno = ENOTSUP;
1496 0 : return false;
1497 : }
1498 :
1499 0 : static int streams_xattr_filesystem_sharemode(vfs_handle_struct *handle,
1500 : files_struct *fsp,
1501 : uint32_t share_access,
1502 : uint32_t access_mask)
1503 : {
1504 0 : struct stream_io *sio =
1505 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1506 :
1507 0 : if (sio == NULL) {
1508 0 : return SMB_VFS_NEXT_FILESYSTEM_SHAREMODE(handle,
1509 : fsp,
1510 : share_access,
1511 : access_mask);
1512 : }
1513 :
1514 0 : return 0;
1515 : }
1516 :
1517 0 : static int streams_xattr_linux_setlease(vfs_handle_struct *handle,
1518 : files_struct *fsp,
1519 : int leasetype)
1520 : {
1521 0 : struct stream_io *sio =
1522 0 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1523 :
1524 0 : if (sio == NULL) {
1525 0 : return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
1526 : }
1527 :
1528 0 : return 0;
1529 : }
1530 :
1531 4 : static bool streams_xattr_strict_lock_check(struct vfs_handle_struct *handle,
1532 : files_struct *fsp,
1533 : struct lock_struct *plock)
1534 : {
1535 2 : struct stream_io *sio =
1536 2 : (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1537 :
1538 4 : if (sio == NULL) {
1539 0 : return SMB_VFS_NEXT_STRICT_LOCK_CHECK(handle, fsp, plock);
1540 : }
1541 :
1542 4 : return true;
1543 : }
1544 :
1545 8 : static int streams_xattr_fcntl(vfs_handle_struct *handle,
1546 : files_struct *fsp,
1547 : int cmd,
1548 : va_list cmd_arg)
1549 : {
1550 : va_list dup_cmd_arg;
1551 : void *arg;
1552 : int ret;
1553 :
1554 8 : if (fsp_is_alternate_stream(fsp)) {
1555 8 : switch (cmd) {
1556 8 : case F_GETFL:
1557 : case F_SETFL:
1558 8 : break;
1559 0 : default:
1560 0 : DBG_ERR("Unsupported fcntl() cmd [%d] on [%s]\n",
1561 : cmd, fsp_str_dbg(fsp));
1562 0 : errno = EINVAL;
1563 0 : return -1;
1564 : }
1565 0 : }
1566 :
1567 8 : va_copy(dup_cmd_arg, cmd_arg);
1568 8 : arg = va_arg(dup_cmd_arg, void *);
1569 :
1570 8 : ret = SMB_VFS_NEXT_FCNTL(handle, fsp, cmd, arg);
1571 :
1572 8 : va_end(dup_cmd_arg);
1573 :
1574 8 : return ret;
1575 : }
1576 :
1577 : static struct vfs_fn_pointers vfs_streams_xattr_fns = {
1578 : .fs_capabilities_fn = streams_xattr_fs_capabilities,
1579 : .connect_fn = streams_xattr_connect,
1580 : .openat_fn = streams_xattr_openat,
1581 : .close_fn = streams_xattr_close,
1582 : .stat_fn = streams_xattr_stat,
1583 : .fstat_fn = streams_xattr_fstat,
1584 : .lstat_fn = streams_xattr_lstat,
1585 : .pread_fn = streams_xattr_pread,
1586 : .pwrite_fn = streams_xattr_pwrite,
1587 : .pread_send_fn = streams_xattr_pread_send,
1588 : .pread_recv_fn = streams_xattr_pread_recv,
1589 : .pwrite_send_fn = streams_xattr_pwrite_send,
1590 : .pwrite_recv_fn = streams_xattr_pwrite_recv,
1591 : .unlinkat_fn = streams_xattr_unlinkat,
1592 : .renameat_fn = streams_xattr_renameat,
1593 : .ftruncate_fn = streams_xattr_ftruncate,
1594 : .fallocate_fn = streams_xattr_fallocate,
1595 : .fstreaminfo_fn = streams_xattr_fstreaminfo,
1596 :
1597 : .fsync_send_fn = streams_xattr_fsync_send,
1598 : .fsync_recv_fn = streams_xattr_fsync_recv,
1599 :
1600 : .lock_fn = streams_xattr_lock,
1601 : .getlock_fn = streams_xattr_getlock,
1602 : .filesystem_sharemode_fn = streams_xattr_filesystem_sharemode,
1603 : .linux_setlease_fn = streams_xattr_linux_setlease,
1604 : .strict_lock_check_fn = streams_xattr_strict_lock_check,
1605 : .fcntl_fn = streams_xattr_fcntl,
1606 :
1607 : .fchown_fn = streams_xattr_fchown,
1608 : .fchmod_fn = streams_xattr_fchmod,
1609 :
1610 : .fgetxattr_fn = streams_xattr_fgetxattr,
1611 : .flistxattr_fn = streams_xattr_flistxattr,
1612 : .fremovexattr_fn = streams_xattr_fremovexattr,
1613 : .fsetxattr_fn = streams_xattr_fsetxattr,
1614 : };
1615 :
1616 : static_decl_vfs;
1617 30 : NTSTATUS vfs_streams_xattr_init(TALLOC_CTX *ctx)
1618 : {
1619 30 : return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
1620 : &vfs_streams_xattr_fns);
1621 : }
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