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vfs_glusterfs: Use glfs_readlinkat() for SMB_VFS_READLINKAT
[Samba.git] / source3 / modules / vfs_streams_xattr.c
blobf3371ca9b7ed146e2b8c2b838a0c2153c6cd55c8
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 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 status = get_ea_value_fsp(talloc_tos(),
56 fsp,
57 xattr_name,
58 &ea);
59 if (!NT_STATUS_IS_OK(status)) {
60 return -1;
61 }
62
63 result = ea.value.length-1;
64 TALLOC_FREE(ea.value.data);
65 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 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 SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
82 return NT_STATUS_UNSUCCESSFUL);
83
84 sname = talloc_strdup(ctx, stream_name + 1);
85 if (sname == NULL) {
86 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 stype = strrchr_m(sname, ':');
104
105 if (stype) {
106 /*
107 * We only support one stream type: "$DATA"
108 */
109 if (strcasecmp_m(stype, ":$DATA") != 0) {
110 talloc_free(sname);
111 return NT_STATUS_INVALID_PARAMETER;
112 }
113
114 /* Split name and type */
115 stype[0] = '\0';
116 }
117
118 *xattr_name = talloc_asprintf(ctx, "%s%s%s",
119 config->prefix,
120 sname,
121 config->store_stream_type ? ":$DATA" : "");
122 if (*xattr_name == NULL) {
123 talloc_free(sname);
124 return NT_STATUS_NO_MEMORY;
125 }
126
127 DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name,
128 stream_name));
129
130 talloc_free(sname);
131 return NT_STATUS_OK;
132 }
133
134 static bool streams_xattr_recheck(struct stream_io *sio)
135 {
136 NTSTATUS status;
137 char *xattr_name = NULL;
138
139 if (sio->fsp->fsp_name == sio->fsp_name_ptr) {
140 return true;
141 }
142
143 if (sio->fsp->fsp_name->stream_name == NULL) {
144 /* how can this happen */
145 errno = EINVAL;
146 return false;
147 }
148
149 status = streams_xattr_get_name(sio->handle, talloc_tos(),
150 sio->fsp->fsp_name->stream_name,
151 &xattr_name);
152 if (!NT_STATUS_IS_OK(status)) {
153 return false;
154 }
155
156 TALLOC_FREE(sio->xattr_name);
157 TALLOC_FREE(sio->base);
158 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
159 xattr_name);
160 if (sio->xattr_name == NULL) {
161 DBG_DEBUG("sio->xattr_name==NULL\n");
162 return false;
163 }
164 TALLOC_FREE(xattr_name);
165
166 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
167 sio->fsp->fsp_name->base_name);
168 if (sio->base == NULL) {
169 DBG_DEBUG("sio->base==NULL\n");
170 return false;
171 }
172
173 sio->fsp_name_ptr = sio->fsp->fsp_name;
174
175 return true;
176 }
177
178 static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
179 SMB_STRUCT_STAT *sbuf)
180 {
181 int ret = -1;
182 struct stream_io *io = (struct stream_io *)
183 VFS_FETCH_FSP_EXTENSION(handle, fsp);
184
185 if (io == NULL || !fsp_is_alternate_stream(fsp)) {
186 return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
187 }
188
189 DBG_DEBUG("streams_xattr_fstat called for %s\n", fsp_str_dbg(io->fsp));
190
191 if (!streams_xattr_recheck(io)) {
192 return -1;
193 }
194
195 ret = SMB_VFS_NEXT_FSTAT(handle, fsp->base_fsp, sbuf);
196 if (ret == -1) {
197 return -1;
198 }
199
200 sbuf->st_ex_size = get_xattr_size_fsp(fsp->base_fsp,
201 io->xattr_name);
202 if (sbuf->st_ex_size == -1) {
203 SET_STAT_INVALID(*sbuf);
204 return -1;
205 }
206
207 DEBUG(10, ("sbuf->st_ex_size = %d\n", (int)sbuf->st_ex_size));
208
209 sbuf->st_ex_ino = hash_inode(sbuf, io->xattr_name);
210 sbuf->st_ex_mode &= ~S_IFMT;
211 sbuf->st_ex_mode &= ~S_IFDIR;
212 sbuf->st_ex_mode |= S_IFREG;
213 sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
214
215 return 0;
216 }
217
218 static int streams_xattr_stat(vfs_handle_struct *handle,
219 struct smb_filename *smb_fname)
220 {
221 NTSTATUS status;
222 int result = -1;
223 char *xattr_name = NULL;
224 char *tmp_stream_name = NULL;
225 struct smb_filename *pathref = NULL;
226 struct files_struct *fsp = smb_fname->fsp;
227
228 if (!is_named_stream(smb_fname)) {
229 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 tmp_stream_name = smb_fname->stream_name;
239 smb_fname->stream_name = NULL;
240 result = SMB_VFS_NEXT_STAT(handle, smb_fname);
241 smb_fname->stream_name = tmp_stream_name;
242
243 if (result == -1) {
244 return -1;
245 }
246
247 /* Derive the xattr name to lookup. */
248 status = streams_xattr_get_name(handle, talloc_tos(),
249 smb_fname->stream_name, &xattr_name);
250 if (!NT_STATUS_IS_OK(status)) {
251 errno = map_errno_from_nt_status(status);
252 return -1;
253 }
254
255 /* Augment the base file's stat information before returning. */
256 if (fsp == NULL) {
257 status = synthetic_pathref(talloc_tos(),
258 handle->conn->cwd_fsp,
259 smb_fname->base_name,
260 NULL,
261 NULL,
262 smb_fname->twrp,
263 smb_fname->flags,
264 &pathref);
265 if (!NT_STATUS_IS_OK(status)) {
266 TALLOC_FREE(xattr_name);
267 SET_STAT_INVALID(smb_fname->st);
268 errno = ENOENT;
269 return -1;
270 }
271 fsp = pathref->fsp;
272 } else {
273 fsp = fsp->base_fsp;
274 }
275
276 smb_fname->st.st_ex_size = get_xattr_size_fsp(fsp,
277 xattr_name);
278 if (smb_fname->st.st_ex_size == -1) {
279 TALLOC_FREE(xattr_name);
280 TALLOC_FREE(pathref);
281 SET_STAT_INVALID(smb_fname->st);
282 errno = ENOENT;
283 return -1;
284 }
285
286 smb_fname->st.st_ex_ino = hash_inode(&smb_fname->st, xattr_name);
287 smb_fname->st.st_ex_mode &= ~S_IFMT;
288 smb_fname->st.st_ex_mode |= S_IFREG;
289 smb_fname->st.st_ex_blocks =
290 smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
291
292 TALLOC_FREE(xattr_name);
293 TALLOC_FREE(pathref);
294 return 0;
295 }
296
297 static int streams_xattr_lstat(vfs_handle_struct *handle,
298 struct smb_filename *smb_fname)
299 {
300 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 SET_STAT_INVALID(smb_fname->st);
308 errno = ENOENT;
309 return -1;
310 }
311 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
312 }
313
314 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 struct streams_xattr_config *config = NULL;
322 struct stream_io *sio = NULL;
323 struct ea_struct ea;
324 char *xattr_name = NULL;
325 int fakefd = -1;
326 bool set_empty_xattr = false;
327 int ret;
328
329 SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
330 return -1);
331
332 DBG_DEBUG("called for %s with flags 0x%x\n",
333 smb_fname_str_dbg(smb_fname),
334 how->flags);
335
336 if (!is_named_stream(smb_fname)) {
337 return SMB_VFS_NEXT_OPENAT(handle,
338 dirfsp,
339 smb_fname,
340 fsp,
341 how);
342 }
343
344 if (how->resolve != 0) {
345 errno = ENOSYS;
346 return -1;
347 }
348
349 SMB_ASSERT(fsp_is_alternate_stream(fsp));
350 SMB_ASSERT(dirfsp == NULL);
351
352 status = streams_xattr_get_name(handle, talloc_tos(),
353 smb_fname->stream_name, &xattr_name);
354 if (!NT_STATUS_IS_OK(status)) {
355 errno = map_errno_from_nt_status(status);
356 goto fail;
357 }
358
359 status = get_ea_value_fsp(talloc_tos(),
360 fsp->base_fsp,
361 xattr_name,
362 &ea);
363
364 DBG_DEBUG("get_ea_value_fsp returned %s\n", nt_errstr(status));
365
366 if (!NT_STATUS_IS_OK(status)) {
367 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 DBG_DEBUG("streams_xattr_open: base file %s not around, "
374 "returning ENOENT\n", smb_fname->base_name);
375 errno = ENOENT;
376 goto fail;
377 }
378
379 if (!(how->flags & O_CREAT)) {
380 errno = ENOATTR;
381 goto fail;
382 }
383
384 set_empty_xattr = true;
385 }
386
387 if (how->flags & O_TRUNC) {
388 set_empty_xattr = true;
389 }
390
391 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 char null = '\0';
400
401 DEBUG(10, ("creating or truncating attribute %s on file %s\n",
402 xattr_name, smb_fname->base_name));
403
404 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
405 xattr_name,
406 &null, sizeof(null),
407 how->flags & O_EXCL ? XATTR_CREATE : 0);
408 if (ret != 0) {
409 goto fail;
410 }
411 }
412
413 fakefd = vfs_fake_fd();
414
415 sio = VFS_ADD_FSP_EXTENSION(handle, fsp, struct stream_io, NULL);
416 if (sio == NULL) {
417 errno = ENOMEM;
418 goto fail;
419 }
420
421 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
422 xattr_name);
423 if (sio->xattr_name == NULL) {
424 errno = ENOMEM;
425 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 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
436 fsp->fsp_name->base_name);
437 if (sio->base == NULL) {
438 errno = ENOMEM;
439 goto fail;
440 }
441
442 sio->fsp_name_ptr = fsp->fsp_name;
443 sio->handle = handle;
444 sio->fsp = fsp;
445
446 return fakefd;
447
448 fail:
449 if (fakefd >= 0) {
450 vfs_fake_fd_close(fakefd);
451 fakefd = -1;
452 }
453
454 return -1;
455 }
456
457 static int streams_xattr_close(vfs_handle_struct *handle,
458 files_struct *fsp)
459 {
460 int ret;
461 int fd;
462
463 fd = fsp_get_pathref_fd(fsp);
464
465 DBG_DEBUG("streams_xattr_close called [%s] fd [%d]\n",
466 smb_fname_str_dbg(fsp->fsp_name), fd);
467
468 if (!fsp_is_alternate_stream(fsp)) {
469 return SMB_VFS_NEXT_CLOSE(handle, fsp);
470 }
471
472 ret = vfs_fake_fd_close(fd);
473 fsp_set_fd(fsp, -1);
474
475 return ret;
476 }
477
478 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 int ret = -1;
485 char *xattr_name = NULL;
486 struct smb_filename *pathref = NULL;
487 struct files_struct *fsp = smb_fname->fsp;
488
489 if (!is_named_stream(smb_fname)) {
490 return SMB_VFS_NEXT_UNLINKAT(handle,
491 dirfsp,
492 smb_fname,
493 flags);
494 }
495
496 /* A stream can never be rmdir'ed */
497 SMB_ASSERT((flags & AT_REMOVEDIR) == 0);
498
499 status = streams_xattr_get_name(handle, talloc_tos(),
500 smb_fname->stream_name, &xattr_name);
501 if (!NT_STATUS_IS_OK(status)) {
502 errno = map_errno_from_nt_status(status);
503 goto fail;
504 }
505
506 if (fsp == NULL) {
507 status = synthetic_pathref(talloc_tos(),
508 handle->conn->cwd_fsp,
509 smb_fname->base_name,
510 NULL,
511 NULL,
512 smb_fname->twrp,
513 smb_fname->flags,
514 &pathref);
515 if (!NT_STATUS_IS_OK(status)) {
516 errno = ENOENT;
517 goto fail;
518 }
519 fsp = pathref->fsp;
520 } else {
521 SMB_ASSERT(fsp_is_alternate_stream(smb_fname->fsp));
522 fsp = fsp->base_fsp;
523 }
524
525 ret = SMB_VFS_FREMOVEXATTR(fsp, xattr_name);
526
527 if ((ret == -1) && (errno == ENOATTR)) {
528 errno = ENOENT;
529 goto fail;
530 }
531
532 ret = 0;
533
534 fail:
535 TALLOC_FREE(xattr_name);
536 TALLOC_FREE(pathref);
537 return ret;
538 }
539
540 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 int ret = -1;
548 char *src_xattr_name = NULL;
549 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 struct smb_filename *pathref_src = NULL;
555 struct smb_filename *pathref_dst = NULL;
556 struct smb_filename *full_src = NULL;
557 struct smb_filename *full_dst = NULL;
558
559 src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
560 dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
561
562 if (!src_is_stream && !dst_is_stream) {
563 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 if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
572 is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
573 errno = ENOSYS;
574 goto done;
575 }
576
577 /* Don't rename if the streams are identical. */
578 if (strcasecmp_m(smb_fname_src->stream_name,
579 smb_fname_dst->stream_name) == 0) {
580 goto done;
581 }
582
583 /* Get the xattr names. */
584 status = streams_xattr_get_name(handle, talloc_tos(),
585 smb_fname_src->stream_name,
586 &src_xattr_name);
587 if (!NT_STATUS_IS_OK(status)) {
588 errno = map_errno_from_nt_status(status);
589 goto fail;
590 }
591 status = streams_xattr_get_name(handle, talloc_tos(),
592 smb_fname_dst->stream_name,
593 &dst_xattr_name);
594 if (!NT_STATUS_IS_OK(status)) {
595 errno = map_errno_from_nt_status(status);
596 goto fail;
597 }
598
599 full_src = full_path_from_dirfsp_atname(talloc_tos(),
600 srcfsp,
601 smb_fname_src);
602 if (full_src == NULL) {
603 errno = ENOMEM;
604 goto fail;
605 }
606 full_dst = full_path_from_dirfsp_atname(talloc_tos(),
607 dstfsp,
608 smb_fname_dst);
609 if (full_dst == NULL) {
610 errno = ENOMEM;
611 goto fail;
612 }
613
614 /* Get a pathref for full_src (base file, no stream name). */
615 status = synthetic_pathref(talloc_tos(),
616 handle->conn->cwd_fsp,
617 full_src->base_name,
618 NULL,
619 NULL,
620 full_src->twrp,
621 full_src->flags,
622 &pathref_src);
623 if (!NT_STATUS_IS_OK(status)) {
624 errno = ENOENT;
625 goto fail;
626 }
627
628 /* Read the old stream from the base file fsp. */
629 status = get_ea_value_fsp(talloc_tos(),
630 pathref_src->fsp,
631 src_xattr_name,
632 &ea);
633 if (!NT_STATUS_IS_OK(status)) {
634 errno = map_errno_from_nt_status(status);
635 goto fail;
636 }
637
638 /* Get a pathref for full_dst (base file, no stream name). */
639 status = synthetic_pathref(talloc_tos(),
640 handle->conn->cwd_fsp,
641 full_dst->base_name,
642 NULL,
643 NULL,
644 full_dst->twrp,
645 full_dst->flags,
646 &pathref_dst);
647 if (!NT_STATUS_IS_OK(status)) {
648 errno = ENOENT;
649 goto fail;
650 }
651
652 /* (Over)write the new stream on the base file fsp. */
653 nret = SMB_VFS_FSETXATTR(
654 pathref_dst->fsp,
655 dst_xattr_name,
656 ea.value.data,
657 ea.value.length,
658 0);
659 if (nret < 0) {
660 if (errno == ENOATTR) {
661 errno = ENOENT;
662 }
663 goto fail;
664 }
665
666 /*
667 * Remove the old stream from the base file fsp.
668 */
669 oret = SMB_VFS_FREMOVEXATTR(pathref_src->fsp,
670 src_xattr_name);
671 if (oret < 0) {
672 if (errno == ENOATTR) {
673 errno = ENOENT;
674 }
675 goto fail;
676 }
677
678 done:
679 errno = 0;
680 ret = 0;
681 fail:
682 TALLOC_FREE(pathref_src);
683 TALLOC_FREE(pathref_dst);
684 TALLOC_FREE(full_src);
685 TALLOC_FREE(full_dst);
686 TALLOC_FREE(src_xattr_name);
687 TALLOC_FREE(dst_xattr_name);
688 return ret;
689 }
690
691 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 SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
704 return NT_STATUS_UNSUCCESSFUL);
705
706 status = get_ea_names_from_fsp(talloc_tos(),
707 smb_fname->fsp,
708 &names,
709 &num_names);
710 if (!NT_STATUS_IS_OK(status)) {
711 return status;
712 }
713
714 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 if (strncasecmp_m(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
729 strlen(SAMBA_XATTR_DOSSTREAM_PREFIX)) != 0) {
730 if (samba_private_attr_name(names[i])) {
731 continue;
732 }
733 }
734
735 if (strncmp(names[i], config->prefix,
736 config->prefix_len) != 0) {
737 continue;
738 }
739
740 status = get_ea_value_fsp(names,
741 smb_fname->fsp,
742 names[i],
743 &ea);
744 if (!NT_STATUS_IS_OK(status)) {
745 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 continue;
750 }
751
752 ea.name = talloc_asprintf(
753 ea.value.data, ":%s%s",
754 names[i] + config->prefix_len,
755 config->store_stream_type ? "" : ":$DATA");
756 if (ea.name == NULL) {
757 DEBUG(0, ("talloc failed\n"));
758 continue;
759 }
760
761 if (!fn(&ea, private_data)) {
762 TALLOC_FREE(ea.value.data);
763 return NT_STATUS_OK;
764 }
765
766 TALLOC_FREE(ea.value.data);
767 }
768
769 TALLOC_FREE(names);
770 return NT_STATUS_OK;
771 }
772
773 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 tmp = talloc_realloc(mem_ctx, *streams, struct stream_struct,
781 (*num_streams)+1);
782 if (tmp == NULL) {
783 return false;
784 }
785
786 tmp[*num_streams].name = talloc_strdup(tmp, name);
787 if (tmp[*num_streams].name == NULL) {
788 return false;
789 }
790
791 tmp[*num_streams].size = size;
792 tmp[*num_streams].alloc_size = alloc_size;
793
794 *streams = tmp;
795 *num_streams += 1;
796 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 static bool collect_one_stream(struct ea_struct *ea, void *private_data)
808 {
809 struct streaminfo_state *state =
810 (struct streaminfo_state *)private_data;
811
812 if (!add_one_stream(state->mem_ctx,
813 &state->num_streams, &state->streams,
814 ea->name, ea->value.length-1,
815 smb_roundup(state->handle->conn,
816 ea->value.length-1))) {
817 state->status = NT_STATUS_NO_MEMORY;
818 return false;
819 }
820
821 return true;
822 }
823
824 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 state.streams = *pstreams;
834 state.num_streams = *pnum_streams;
835 state.mem_ctx = mem_ctx;
836 state.handle = handle;
837 state.status = NT_STATUS_OK;
838
839 status = walk_xattr_streams(handle,
840 fsp,
841 fsp->fsp_name,
842 collect_one_stream,
843 &state);
844
845 if (!NT_STATUS_IS_OK(status)) {
846 TALLOC_FREE(state.streams);
847 return status;
848 }
849
850 if (!NT_STATUS_IS_OK(state.status)) {
851 TALLOC_FREE(state.streams);
852 return state.status;
853 }
854
855 *pnum_streams = state.num_streams;
856 *pstreams = state.streams;
857
858 return SMB_VFS_NEXT_FSTREAMINFO(handle,
859 fsp,
860 mem_ctx,
861 pnum_streams,
862 pstreams);
863 }
864
865 static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle,
866 enum timestamp_set_resolution *p_ts_res)
867 {
868 return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
869 }
870
871 static int streams_xattr_connect(vfs_handle_struct *handle,
872 const char *service, const char *user)
873 {
874 struct streams_xattr_config *config;
875 const char *default_prefix = SAMBA_XATTR_DOSSTREAM_PREFIX;
876 const char *prefix;
877 int rc;
878
879 rc = SMB_VFS_NEXT_CONNECT(handle, service, user);
880 if (rc != 0) {
881 return rc;
882 }
883
884 config = talloc_zero(handle->conn, struct streams_xattr_config);
885 if (config == NULL) {
886 DEBUG(1, ("talloc_zero() failed\n"));
887 errno = ENOMEM;
888 return -1;
889 }
890
891 prefix = lp_parm_const_string(SNUM(handle->conn),
892 "streams_xattr", "prefix",
893 default_prefix);
894 config->prefix = talloc_strdup(config, prefix);
895 if (config->prefix == NULL) {
896 DEBUG(1, ("talloc_strdup() failed\n"));
897 errno = ENOMEM;
898 return -1;
899 }
900 config->prefix_len = strlen(config->prefix);
901 DEBUG(10, ("streams_xattr using stream prefix: %s\n", config->prefix));
902
903 config->store_stream_type = lp_parm_bool(SNUM(handle->conn),
904 "streams_xattr",
905 "store_stream_type",
906 true);
907
908 SMB_VFS_HANDLE_SET_DATA(handle, config,
909 NULL, struct stream_xattr_config,
910 return -1);
911
912 return 0;
913 }
914
915 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 struct stream_io *sio =
920 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
921 struct ea_struct ea;
922 NTSTATUS status;
923 int ret;
924
925 DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
926
927 if (sio == NULL) {
928 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
929 }
930
931 if (!streams_xattr_recheck(sio)) {
932 return -1;
933 }
934
935 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 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 errno = EOVERFLOW;
953 return -1;
954 }
955
956 status = get_ea_value_fsp(talloc_tos(),
957 fsp->base_fsp,
958 sio->xattr_name,
959 &ea);
960 if (!NT_STATUS_IS_OK(status)) {
961 return -1;
962 }
963
964 if ((offset + n) > ea.value.length-1) {
965 uint8_t *tmp;
966
967 tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
968 offset + n + 1);
969
970 if (tmp == NULL) {
971 TALLOC_FREE(ea.value.data);
972 errno = ENOMEM;
973 return -1;
974 }
975 ea.value.data = tmp;
976 ea.value.length = offset + n + 1;
977 ea.value.data[offset+n] = 0;
978 }
979
980 memcpy(ea.value.data + offset, data, n);
981
982 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
983 sio->xattr_name,
984 ea.value.data,
985 ea.value.length,
986 0);
987 TALLOC_FREE(ea.value.data);
988
989 if (ret == -1) {
990 return -1;
991 }
992
993 return n;
994 }
995
996 static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
997 files_struct *fsp, void *data,
998 size_t n, off_t offset)
999 {
1000 struct stream_io *sio =
1001 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1002 struct ea_struct ea;
1003 NTSTATUS status;
1004 size_t length, overlap;
1005
1006 DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
1007 (int)offset, (int)n));
1008
1009 if (sio == NULL) {
1010 return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
1011 }
1012
1013 if (!streams_xattr_recheck(sio)) {
1014 return -1;
1015 }
1016
1017 status = get_ea_value_fsp(talloc_tos(),
1018 fsp->base_fsp,
1019 sio->xattr_name,
1020 &ea);
1021 if (!NT_STATUS_IS_OK(status)) {
1022 return -1;
1023 }
1024
1025 length = ea.value.length-1;
1026
1027 DBG_DEBUG("get_ea_value_fsp returned %d bytes\n",
1028 (int)length);
1029
1030 /* Attempt to read past EOF. */
1031 if (length <= offset) {
1032 return 0;
1033 }
1034
1035 overlap = (offset + n) > length ? (length - offset) : n;
1036 memcpy(data, ea.value.data + offset, overlap);
1037
1038 TALLOC_FREE(ea.value.data);
1039 return overlap;
1040 }
1041
1042 struct streams_xattr_pread_state {
1043 ssize_t nread;
1044 struct vfs_aio_state vfs_aio_state;
1045 };
1046
1047 static void streams_xattr_pread_done(struct tevent_req *subreq);
1048
1049 static struct tevent_req *streams_xattr_pread_send(
1050 struct vfs_handle_struct *handle,
1051 TALLOC_CTX *mem_ctx,
1052 struct tevent_context *ev,
1053 struct files_struct *fsp,
1054 void *data,
1055 size_t n, off_t offset)
1056 {
1057 struct tevent_req *req = NULL;
1058 struct tevent_req *subreq = NULL;
1059 struct streams_xattr_pread_state *state = NULL;
1060 struct stream_io *sio =
1061 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1062
1063 req = tevent_req_create(mem_ctx, &state,
1064 struct streams_xattr_pread_state);
1065 if (req == NULL) {
1066 return NULL;
1067 }
1068
1069 if (sio == NULL) {
1070 subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp,
1071 data, n, offset);
1072 if (tevent_req_nomem(req, subreq)) {
1073 return tevent_req_post(req, ev);
1074 }
1075 tevent_req_set_callback(subreq, streams_xattr_pread_done, req);
1076 return req;
1077 }
1078
1079 state->nread = SMB_VFS_PREAD(fsp, data, n, offset);
1080 if (state->nread != n) {
1081 if (state->nread != -1) {
1082 errno = EIO;
1083 }
1084 tevent_req_error(req, errno);
1085 return tevent_req_post(req, ev);
1086 }
1087
1088 tevent_req_done(req);
1089 return tevent_req_post(req, ev);
1090 }
1091
1092 static void streams_xattr_pread_done(struct tevent_req *subreq)
1093 {
1094 struct tevent_req *req = tevent_req_callback_data(
1095 subreq, struct tevent_req);
1096 struct streams_xattr_pread_state *state = tevent_req_data(
1097 req, struct streams_xattr_pread_state);
1098
1099 state->nread = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
1100 TALLOC_FREE(subreq);
1101
1102 if (tevent_req_error(req, state->vfs_aio_state.error)) {
1103 return;
1104 }
1105 tevent_req_done(req);
1106 }
1107
1108 static ssize_t streams_xattr_pread_recv(struct tevent_req *req,
1109 struct vfs_aio_state *vfs_aio_state)
1110 {
1111 struct streams_xattr_pread_state *state = tevent_req_data(
1112 req, struct streams_xattr_pread_state);
1113
1114 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1115 return -1;
1116 }
1117
1118 *vfs_aio_state = state->vfs_aio_state;
1119 return state->nread;
1120 }
1121
1122 struct streams_xattr_pwrite_state {
1123 ssize_t nwritten;
1124 struct vfs_aio_state vfs_aio_state;
1125 };
1126
1127 static void streams_xattr_pwrite_done(struct tevent_req *subreq);
1128
1129 static struct tevent_req *streams_xattr_pwrite_send(
1130 struct vfs_handle_struct *handle,
1131 TALLOC_CTX *mem_ctx,
1132 struct tevent_context *ev,
1133 struct files_struct *fsp,
1134 const void *data,
1135 size_t n, off_t offset)
1136 {
1137 struct tevent_req *req = NULL;
1138 struct tevent_req *subreq = NULL;
1139 struct streams_xattr_pwrite_state *state = NULL;
1140 struct stream_io *sio =
1141 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1142
1143 req = tevent_req_create(mem_ctx, &state,
1144 struct streams_xattr_pwrite_state);
1145 if (req == NULL) {
1146 return NULL;
1147 }
1148
1149 if (sio == NULL) {
1150 subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp,
1151 data, n, offset);
1152 if (tevent_req_nomem(req, subreq)) {
1153 return tevent_req_post(req, ev);
1154 }
1155 tevent_req_set_callback(subreq, streams_xattr_pwrite_done, req);
1156 return req;
1157 }
1158
1159 state->nwritten = SMB_VFS_PWRITE(fsp, data, n, offset);
1160 if (state->nwritten != n) {
1161 if (state->nwritten != -1) {
1162 errno = EIO;
1163 }
1164 tevent_req_error(req, errno);
1165 return tevent_req_post(req, ev);
1166 }
1167
1168 tevent_req_done(req);
1169 return tevent_req_post(req, ev);
1170 }
1171
1172 static void streams_xattr_pwrite_done(struct tevent_req *subreq)
1173 {
1174 struct tevent_req *req = tevent_req_callback_data(
1175 subreq, struct tevent_req);
1176 struct streams_xattr_pwrite_state *state = tevent_req_data(
1177 req, struct streams_xattr_pwrite_state);
1178
1179 state->nwritten = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
1180 TALLOC_FREE(subreq);
1181
1182 if (tevent_req_error(req, state->vfs_aio_state.error)) {
1183 return;
1184 }
1185 tevent_req_done(req);
1186 }
1187
1188 static ssize_t streams_xattr_pwrite_recv(struct tevent_req *req,
1189 struct vfs_aio_state *vfs_aio_state)
1190 {
1191 struct streams_xattr_pwrite_state *state = tevent_req_data(
1192 req, struct streams_xattr_pwrite_state);
1193
1194 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1195 return -1;
1196 }
1197
1198 *vfs_aio_state = state->vfs_aio_state;
1199 return state->nwritten;
1200 }
1201
1202 static int streams_xattr_ftruncate(struct vfs_handle_struct *handle,
1203 struct files_struct *fsp,
1204 off_t offset)
1205 {
1206 int ret;
1207 uint8_t *tmp;
1208 struct ea_struct ea;
1209 NTSTATUS status;
1210 struct stream_io *sio =
1211 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1212
1213 DEBUG(10, ("streams_xattr_ftruncate called for file %s offset %.0f\n",
1214 fsp_str_dbg(fsp), (double)offset));
1215
1216 if (sio == NULL) {
1217 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
1218 }
1219
1220 if (!streams_xattr_recheck(sio)) {
1221 return -1;
1222 }
1223
1224 status = get_ea_value_fsp(talloc_tos(),
1225 fsp->base_fsp,
1226 sio->xattr_name,
1227 &ea);
1228 if (!NT_STATUS_IS_OK(status)) {
1229 return -1;
1230 }
1231
1232 tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
1233 offset + 1);
1234
1235 if (tmp == NULL) {
1236 TALLOC_FREE(ea.value.data);
1237 errno = ENOMEM;
1238 return -1;
1239 }
1240
1241 /* Did we expand ? */
1242 if (ea.value.length < offset + 1) {
1243 memset(&tmp[ea.value.length], '\0',
1244 offset + 1 - ea.value.length);
1245 }
1246
1247 ea.value.data = tmp;
1248 ea.value.length = offset + 1;
1249 ea.value.data[offset] = 0;
1250
1251 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
1252 sio->xattr_name,
1253 ea.value.data,
1254 ea.value.length,
1255 0);
1256
1257 TALLOC_FREE(ea.value.data);
1258
1259 if (ret == -1) {
1260 return -1;
1261 }
1262
1263 return 0;
1264 }
1265
1266 static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
1267 struct files_struct *fsp,
1268 uint32_t mode,
1269 off_t offset,
1270 off_t len)
1271 {
1272 struct stream_io *sio =
1273 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1274
1275 DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1276 "len = %.0f\n",
1277 fsp_str_dbg(fsp), (double)offset, (double)len));
1278
1279 if (sio == NULL) {
1280 return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1281 }
1282
1283 if (!streams_xattr_recheck(sio)) {
1284 return -1;
1285 }
1286
1287 /* Let the pwrite code path handle it. */
1288 errno = ENOSYS;
1289 return -1;
1290 }
1291
1292 static int streams_xattr_fchown(vfs_handle_struct *handle, files_struct *fsp,
1293 uid_t uid, gid_t gid)
1294 {
1295 struct stream_io *sio =
1296 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1297
1298 if (sio == NULL) {
1299 return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
1300 }
1301
1302 return 0;
1303 }
1304
1305 static int streams_xattr_fchmod(vfs_handle_struct *handle,
1306 files_struct *fsp,
1307 mode_t mode)
1308 {
1309 struct stream_io *sio =
1310 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1311
1312 if (sio == NULL) {
1313 return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1314 }
1315
1316 return 0;
1317 }
1318
1319 static ssize_t streams_xattr_fgetxattr(struct vfs_handle_struct *handle,
1320 struct files_struct *fsp,
1321 const char *name,
1322 void *value,
1323 size_t size)
1324 {
1325 struct stream_io *sio =
1326 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1327
1328 if (sio == NULL) {
1329 return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
1330 }
1331
1332 errno = ENOTSUP;
1333 return -1;
1334 }
1335
1336 static ssize_t streams_xattr_flistxattr(struct vfs_handle_struct *handle,
1337 struct files_struct *fsp,
1338 char *list,
1339 size_t size)
1340 {
1341 struct stream_io *sio =
1342 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1343
1344 if (sio == NULL) {
1345 return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
1346 }
1347
1348 errno = ENOTSUP;
1349 return -1;
1350 }
1351
1352 static int streams_xattr_fremovexattr(struct vfs_handle_struct *handle,
1353 struct files_struct *fsp,
1354 const char *name)
1355 {
1356 struct stream_io *sio =
1357 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1358
1359 if (sio == NULL) {
1360 return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
1361 }
1362
1363 errno = ENOTSUP;
1364 return -1;
1365 }
1366
1367 static int streams_xattr_fsetxattr(struct vfs_handle_struct *handle,
1368 struct files_struct *fsp,
1369 const char *name,
1370 const void *value,
1371 size_t size,
1372 int flags)
1373 {
1374 struct stream_io *sio =
1375 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1376
1377 if (sio == NULL) {
1378 return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value,
1379 size, flags);
1380 }
1381
1382 errno = ENOTSUP;
1383 return -1;
1384 }
1385
1386 struct streams_xattr_fsync_state {
1387 int ret;
1388 struct vfs_aio_state vfs_aio_state;
1389 };
1390
1391 static void streams_xattr_fsync_done(struct tevent_req *subreq);
1392
1393 static struct tevent_req *streams_xattr_fsync_send(
1394 struct vfs_handle_struct *handle,
1395 TALLOC_CTX *mem_ctx,
1396 struct tevent_context *ev,
1397 struct files_struct *fsp)
1398 {
1399 struct tevent_req *req = NULL;
1400 struct tevent_req *subreq = NULL;
1401 struct streams_xattr_fsync_state *state = NULL;
1402 struct stream_io *sio =
1403 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1404
1405 req = tevent_req_create(mem_ctx, &state,
1406 struct streams_xattr_fsync_state);
1407 if (req == NULL) {
1408 return NULL;
1409 }
1410
1411 if (sio == NULL) {
1412 subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
1413 if (tevent_req_nomem(req, subreq)) {
1414 return tevent_req_post(req, ev);
1415 }
1416 tevent_req_set_callback(subreq, streams_xattr_fsync_done, req);
1417 return req;
1418 }
1419
1420 /*
1421 * There's no pathname based sync variant and we don't have access to
1422 * the basefile handle, so we can't do anything here.
1423 */
1424
1425 tevent_req_done(req);
1426 return tevent_req_post(req, ev);
1427 }
1428
1429 static void streams_xattr_fsync_done(struct tevent_req *subreq)
1430 {
1431 struct tevent_req *req = tevent_req_callback_data(
1432 subreq, struct tevent_req);
1433 struct streams_xattr_fsync_state *state = tevent_req_data(
1434 req, struct streams_xattr_fsync_state);
1435
1436 state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->vfs_aio_state);
1437 TALLOC_FREE(subreq);
1438 if (state->ret != 0) {
1439 tevent_req_error(req, errno);
1440 return;
1441 }
1442
1443 tevent_req_done(req);
1444 }
1445
1446 static int streams_xattr_fsync_recv(struct tevent_req *req,
1447 struct vfs_aio_state *vfs_aio_state)
1448 {
1449 struct streams_xattr_fsync_state *state = tevent_req_data(
1450 req, struct streams_xattr_fsync_state);
1451
1452 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1453 return -1;
1454 }
1455
1456 *vfs_aio_state = state->vfs_aio_state;
1457 return state->ret;
1458 }
1459
1460 static bool streams_xattr_lock(vfs_handle_struct *handle,
1461 files_struct *fsp,
1462 int op,
1463 off_t offset,
1464 off_t count,
1465 int type)
1466 {
1467 struct stream_io *sio =
1468 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1469
1470 if (sio == NULL) {
1471 return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
1472 }
1473
1474 return true;
1475 }
1476
1477 static bool streams_xattr_getlock(vfs_handle_struct *handle,
1478 files_struct *fsp,
1479 off_t *poffset,
1480 off_t *pcount,
1481 int *ptype,
1482 pid_t *ppid)
1483 {
1484 struct stream_io *sio =
1485 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1486
1487 if (sio == NULL) {
1488 return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset,
1489 pcount, ptype, ppid);
1490 }
1491
1492 errno = ENOTSUP;
1493 return false;
1494 }
1495
1496 static int streams_xattr_filesystem_sharemode(vfs_handle_struct *handle,
1497 files_struct *fsp,
1498 uint32_t share_access,
1499 uint32_t access_mask)
1500 {
1501 struct stream_io *sio =
1502 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1503
1504 if (sio == NULL) {
1505 return SMB_VFS_NEXT_FILESYSTEM_SHAREMODE(handle,
1506 fsp,
1507 share_access,
1508 access_mask);
1509 }
1510
1511 return 0;
1512 }
1513
1514 static int streams_xattr_linux_setlease(vfs_handle_struct *handle,
1515 files_struct *fsp,
1516 int leasetype)
1517 {
1518 struct stream_io *sio =
1519 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1520
1521 if (sio == NULL) {
1522 return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
1523 }
1524
1525 return 0;
1526 }
1527
1528 static bool streams_xattr_strict_lock_check(struct vfs_handle_struct *handle,
1529 files_struct *fsp,
1530 struct lock_struct *plock)
1531 {
1532 struct stream_io *sio =
1533 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1534
1535 if (sio == NULL) {
1536 return SMB_VFS_NEXT_STRICT_LOCK_CHECK(handle, fsp, plock);
1537 }
1538
1539 return true;
1540 }
1541
1542 static int streams_xattr_fcntl(vfs_handle_struct *handle,
1543 files_struct *fsp,
1544 int cmd,
1545 va_list cmd_arg)
1546 {
1547 va_list dup_cmd_arg;
1548 void *arg;
1549 int ret;
1550
1551 if (fsp_is_alternate_stream(fsp)) {
1552 switch (cmd) {
1553 case F_GETFL:
1554 case F_SETFL:
1555 break;
1556 default:
1557 DBG_ERR("Unsupported fcntl() cmd [%d] on [%s]\n",
1558 cmd, fsp_str_dbg(fsp));
1559 errno = EINVAL;
1560 return -1;
1561 }
1562 }
1563
1564 va_copy(dup_cmd_arg, cmd_arg);
1565 arg = va_arg(dup_cmd_arg, void *);
1566
1567 ret = SMB_VFS_NEXT_FCNTL(handle, fsp, cmd, arg);
1568
1569 va_end(dup_cmd_arg);
1570
1571 return ret;
1572 }
1573
1574 static struct vfs_fn_pointers vfs_streams_xattr_fns = {
1575 .fs_capabilities_fn = streams_xattr_fs_capabilities,
1576 .connect_fn = streams_xattr_connect,
1577 .openat_fn = streams_xattr_openat,
1578 .close_fn = streams_xattr_close,
1579 .stat_fn = streams_xattr_stat,
1580 .fstat_fn = streams_xattr_fstat,
1581 .lstat_fn = streams_xattr_lstat,
1582 .pread_fn = streams_xattr_pread,
1583 .pwrite_fn = streams_xattr_pwrite,
1584 .pread_send_fn = streams_xattr_pread_send,
1585 .pread_recv_fn = streams_xattr_pread_recv,
1586 .pwrite_send_fn = streams_xattr_pwrite_send,
1587 .pwrite_recv_fn = streams_xattr_pwrite_recv,
1588 .unlinkat_fn = streams_xattr_unlinkat,
1589 .renameat_fn = streams_xattr_renameat,
1590 .ftruncate_fn = streams_xattr_ftruncate,
1591 .fallocate_fn = streams_xattr_fallocate,
1592 .fstreaminfo_fn = streams_xattr_fstreaminfo,
1593
1594 .fsync_send_fn = streams_xattr_fsync_send,
1595 .fsync_recv_fn = streams_xattr_fsync_recv,
1596
1597 .lock_fn = streams_xattr_lock,
1598 .getlock_fn = streams_xattr_getlock,
1599 .filesystem_sharemode_fn = streams_xattr_filesystem_sharemode,
1600 .linux_setlease_fn = streams_xattr_linux_setlease,
1601 .strict_lock_check_fn = streams_xattr_strict_lock_check,
1602 .fcntl_fn = streams_xattr_fcntl,
1603
1604 .fchown_fn = streams_xattr_fchown,
1605 .fchmod_fn = streams_xattr_fchmod,
1606
1607 .fgetxattr_fn = streams_xattr_fgetxattr,
1608 .flistxattr_fn = streams_xattr_flistxattr,
1609 .fremovexattr_fn = streams_xattr_fremovexattr,
1610 .fsetxattr_fn = streams_xattr_fsetxattr,
1611 };
1612
1613 static_decl_vfs;
1614 NTSTATUS vfs_streams_xattr_init(TALLOC_CTX *ctx)
1615 {
1616 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
1617 &vfs_streams_xattr_fns);
1618 }
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