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s3: VFS: streams_xattr: Compression is only set/get on base filenames.
[Samba.git] / source3 / modules / vfs_streams_xattr.c
blobf75f6a18dd6611d571274958f517ef500e79c42b
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/crypto/md5.h"
28 #include "lib/util/tevent_unix.h"
29 #include "librpc/gen_ndr/ioctl.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 SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
49 {
50 MD5_CTX ctx;
51 unsigned char hash[16];
52 SMB_INO_T result;
53 char *upper_sname;
54
55 DEBUG(10, ("stream_inode called for %lu/%lu [%s]\n",
56 (unsigned long)sbuf->st_ex_dev,
57 (unsigned long)sbuf->st_ex_ino, sname));
58
59 upper_sname = talloc_strdup_upper(talloc_tos(), sname);
60 SMB_ASSERT(upper_sname != NULL);
61
62 MD5Init(&ctx);
63 MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_dev),
64 sizeof(sbuf->st_ex_dev));
65 MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_ino),
66 sizeof(sbuf->st_ex_ino));
67 MD5Update(&ctx, (unsigned char *)upper_sname,
68 talloc_get_size(upper_sname)-1);
69 MD5Final(hash, &ctx);
70
71 TALLOC_FREE(upper_sname);
72
73 /* Hopefully all the variation is in the lower 4 (or 8) bytes! */
74 memcpy(&result, hash, sizeof(result));
75
76 DEBUG(10, ("stream_inode returns %lu\n", (unsigned long)result));
77
78 return result;
79 }
80
81 static ssize_t get_xattr_size(connection_struct *conn,
82 const struct smb_filename *smb_fname,
83 const char *xattr_name)
84 {
85 NTSTATUS status;
86 struct ea_struct ea;
87 ssize_t result;
88
89 status = get_ea_value(talloc_tos(), conn, NULL, smb_fname,
90 xattr_name, &ea);
91
92 if (!NT_STATUS_IS_OK(status)) {
93 return -1;
94 }
95
96 result = ea.value.length-1;
97 TALLOC_FREE(ea.value.data);
98 return result;
99 }
100
101 /**
102 * Given a stream name, populate xattr_name with the xattr name to use for
103 * accessing the stream.
104 */
105 static NTSTATUS streams_xattr_get_name(vfs_handle_struct *handle,
106 TALLOC_CTX *ctx,
107 const char *stream_name,
108 char **xattr_name)
109 {
110 char *sname;
111 char *stype;
112 struct streams_xattr_config *config;
113
114 SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
115 return NT_STATUS_UNSUCCESSFUL);
116
117 sname = talloc_strdup(ctx, stream_name + 1);
118 if (sname == NULL) {
119 return NT_STATUS_NO_MEMORY;
120 }
121
122 /*
123 * With vfs_fruit option "fruit:encoding = native" we're
124 * already converting stream names that contain illegal NTFS
125 * characters from their on-the-wire Unicode Private Range
126 * encoding to their native ASCII representation.
127 *
128 * As as result the name of xattrs storing the streams (via
129 * vfs_streams_xattr) may contain a colon, so we have to use
130 * strrchr_m() instead of strchr_m() for matching the stream
131 * type suffix.
132 *
133 * In check_path_syntax() we've already ensured the streamname
134 * we got from the client is valid.
135 */
136 stype = strrchr_m(sname, ':');
137
138 if (stype) {
139 /*
140 * We only support one stream type: "$DATA"
141 */
142 if (strcasecmp_m(stype, ":$DATA") != 0) {
143 talloc_free(sname);
144 return NT_STATUS_INVALID_PARAMETER;
145 }
146
147 /* Split name and type */
148 stype[0] = '\0';
149 }
150
151 *xattr_name = talloc_asprintf(ctx, "%s%s%s",
152 config->prefix,
153 sname,
154 config->store_stream_type ? ":$DATA" : "");
155 if (*xattr_name == NULL) {
156 talloc_free(sname);
157 return NT_STATUS_NO_MEMORY;
158 }
159
160 DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name,
161 stream_name));
162
163 talloc_free(sname);
164 return NT_STATUS_OK;
165 }
166
167 static bool streams_xattr_recheck(struct stream_io *sio)
168 {
169 NTSTATUS status;
170 char *xattr_name = NULL;
171
172 if (sio->fsp->fsp_name == sio->fsp_name_ptr) {
173 return true;
174 }
175
176 if (sio->fsp->fsp_name->stream_name == NULL) {
177 /* how can this happen */
178 errno = EINVAL;
179 return false;
180 }
181
182 status = streams_xattr_get_name(sio->handle, talloc_tos(),
183 sio->fsp->fsp_name->stream_name,
184 &xattr_name);
185 if (!NT_STATUS_IS_OK(status)) {
186 return false;
187 }
188
189 TALLOC_FREE(sio->xattr_name);
190 TALLOC_FREE(sio->base);
191 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
192 xattr_name);
193 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
194 sio->fsp->fsp_name->base_name);
195 sio->fsp_name_ptr = sio->fsp->fsp_name;
196
197 TALLOC_FREE(xattr_name);
198
199 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
200 return false;
201 }
202
203 return true;
204 }
205
206 /**
207 * Helper to stat/lstat the base file of an smb_fname.
208 */
209 static int streams_xattr_stat_base(vfs_handle_struct *handle,
210 struct smb_filename *smb_fname,
211 bool follow_links)
212 {
213 char *tmp_stream_name;
214 int result;
215
216 tmp_stream_name = smb_fname->stream_name;
217 smb_fname->stream_name = NULL;
218 if (follow_links) {
219 result = SMB_VFS_NEXT_STAT(handle, smb_fname);
220 } else {
221 result = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
222 }
223 smb_fname->stream_name = tmp_stream_name;
224 return result;
225 }
226
227 static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
228 SMB_STRUCT_STAT *sbuf)
229 {
230 struct smb_filename *smb_fname_base = NULL;
231 int ret = -1;
232 struct stream_io *io = (struct stream_io *)
233 VFS_FETCH_FSP_EXTENSION(handle, fsp);
234
235 if (io == NULL || fsp->base_fsp == NULL) {
236 return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
237 }
238
239 DBG_DEBUG("streams_xattr_fstat called for %s\n", fsp_str_dbg(io->fsp));
240
241 if (!streams_xattr_recheck(io)) {
242 return -1;
243 }
244
245 /* Create an smb_filename with stream_name == NULL. */
246 smb_fname_base = synthetic_smb_fname(talloc_tos(),
247 io->base,
248 NULL,
249 NULL,
250 fsp->fsp_name->flags);
251 if (smb_fname_base == NULL) {
252 errno = ENOMEM;
253 return -1;
254 }
255
256 if (smb_fname_base->flags & SMB_FILENAME_POSIX_PATH) {
257 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_base);
258 } else {
259 ret = SMB_VFS_STAT(handle->conn, smb_fname_base);
260 }
261 *sbuf = smb_fname_base->st;
262
263 if (ret == -1) {
264 TALLOC_FREE(smb_fname_base);
265 return -1;
266 }
267
268 sbuf->st_ex_size = get_xattr_size(handle->conn,
269 smb_fname_base, io->xattr_name);
270 if (sbuf->st_ex_size == -1) {
271 TALLOC_FREE(smb_fname_base);
272 SET_STAT_INVALID(*sbuf);
273 return -1;
274 }
275
276 DEBUG(10, ("sbuf->st_ex_size = %d\n", (int)sbuf->st_ex_size));
277
278 sbuf->st_ex_ino = stream_inode(sbuf, io->xattr_name);
279 sbuf->st_ex_mode &= ~S_IFMT;
280 sbuf->st_ex_mode |= S_IFREG;
281 sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
282
283 TALLOC_FREE(smb_fname_base);
284 return 0;
285 }
286
287 static int streams_xattr_stat(vfs_handle_struct *handle,
288 struct smb_filename *smb_fname)
289 {
290 NTSTATUS status;
291 int result = -1;
292 char *xattr_name = NULL;
293
294 if (!is_ntfs_stream_smb_fname(smb_fname)) {
295 return SMB_VFS_NEXT_STAT(handle, smb_fname);
296 }
297
298 /* Note if lp_posix_paths() is true, we can never
299 * get here as is_ntfs_stream_smb_fname() is
300 * always false. So we never need worry about
301 * not following links here. */
302
303 /* If the default stream is requested, just stat the base file. */
304 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
305 return streams_xattr_stat_base(handle, smb_fname, true);
306 }
307
308 /* Populate the stat struct with info from the base file. */
309 if (streams_xattr_stat_base(handle, smb_fname, true) == -1) {
310 return -1;
311 }
312
313 /* Derive the xattr name to lookup. */
314 status = streams_xattr_get_name(handle, talloc_tos(),
315 smb_fname->stream_name, &xattr_name);
316 if (!NT_STATUS_IS_OK(status)) {
317 errno = map_errno_from_nt_status(status);
318 return -1;
319 }
320
321 /* Augment the base file's stat information before returning. */
322 smb_fname->st.st_ex_size = get_xattr_size(handle->conn,
323 smb_fname,
324 xattr_name);
325 if (smb_fname->st.st_ex_size == -1) {
326 SET_STAT_INVALID(smb_fname->st);
327 errno = ENOENT;
328 result = -1;
329 goto fail;
330 }
331
332 smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
333 smb_fname->st.st_ex_mode &= ~S_IFMT;
334 smb_fname->st.st_ex_mode |= S_IFREG;
335 smb_fname->st.st_ex_blocks =
336 smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
337
338 result = 0;
339 fail:
340 TALLOC_FREE(xattr_name);
341 return result;
342 }
343
344 static int streams_xattr_lstat(vfs_handle_struct *handle,
345 struct smb_filename *smb_fname)
346 {
347 NTSTATUS status;
348 int result = -1;
349 char *xattr_name = NULL;
350
351 if (!is_ntfs_stream_smb_fname(smb_fname)) {
352 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
353 }
354
355 /* If the default stream is requested, just stat the base file. */
356 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
357 return streams_xattr_stat_base(handle, smb_fname, false);
358 }
359
360 /* Populate the stat struct with info from the base file. */
361 if (streams_xattr_stat_base(handle, smb_fname, false) == -1) {
362 return -1;
363 }
364
365 /* Derive the xattr name to lookup. */
366 status = streams_xattr_get_name(handle, talloc_tos(),
367 smb_fname->stream_name, &xattr_name);
368 if (!NT_STATUS_IS_OK(status)) {
369 errno = map_errno_from_nt_status(status);
370 return -1;
371 }
372
373 /* Augment the base file's stat information before returning. */
374 smb_fname->st.st_ex_size = get_xattr_size(handle->conn,
375 smb_fname,
376 xattr_name);
377 if (smb_fname->st.st_ex_size == -1) {
378 SET_STAT_INVALID(smb_fname->st);
379 errno = ENOENT;
380 result = -1;
381 goto fail;
382 }
383
384 smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
385 smb_fname->st.st_ex_mode &= ~S_IFMT;
386 smb_fname->st.st_ex_mode |= S_IFREG;
387 smb_fname->st.st_ex_blocks =
388 smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
389
390 result = 0;
391
392 fail:
393 TALLOC_FREE(xattr_name);
394 return result;
395 }
396
397 static int streams_xattr_open(vfs_handle_struct *handle,
398 struct smb_filename *smb_fname,
399 files_struct *fsp, int flags, mode_t mode)
400 {
401 NTSTATUS status;
402 struct streams_xattr_config *config = NULL;
403 struct stream_io *sio = NULL;
404 struct ea_struct ea;
405 char *xattr_name = NULL;
406 int pipe_fds[2];
407 int fakefd = -1;
408 int ret;
409
410 SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
411 return -1);
412
413 DEBUG(10, ("streams_xattr_open called for %s with flags 0x%x\n",
414 smb_fname_str_dbg(smb_fname), flags));
415
416 if (!is_ntfs_stream_smb_fname(smb_fname)) {
417 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
418 }
419
420 /* If the default stream is requested, just open the base file. */
421 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
422 char *tmp_stream_name;
423
424 tmp_stream_name = smb_fname->stream_name;
425 smb_fname->stream_name = NULL;
426
427 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
428
429 smb_fname->stream_name = tmp_stream_name;
430
431 return ret;
432 }
433
434 status = streams_xattr_get_name(handle, talloc_tos(),
435 smb_fname->stream_name, &xattr_name);
436 if (!NT_STATUS_IS_OK(status)) {
437 errno = map_errno_from_nt_status(status);
438 goto fail;
439 }
440
441 /*
442 * Return a valid fd, but ensure any attempt to use it returns an error
443 * (EPIPE).
444 */
445 ret = pipe(pipe_fds);
446 if (ret != 0) {
447 goto fail;
448 }
449
450 close(pipe_fds[1]);
451 pipe_fds[1] = -1;
452 fakefd = pipe_fds[0];
453
454 status = get_ea_value(talloc_tos(), handle->conn, NULL,
455 smb_fname, xattr_name, &ea);
456
457 DEBUG(10, ("get_ea_value returned %s\n", nt_errstr(status)));
458
459 if (!NT_STATUS_IS_OK(status)
460 && !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
461 /*
462 * The base file is not there. This is an error even if we got
463 * O_CREAT, the higher levels should have created the base
464 * file for us.
465 */
466 DEBUG(10, ("streams_xattr_open: base file %s not around, "
467 "returning ENOENT\n", smb_fname->base_name));
468 errno = ENOENT;
469 goto fail;
470 }
471
472 if ((!NT_STATUS_IS_OK(status) && (flags & O_CREAT)) ||
473 (flags & O_TRUNC)) {
474 /*
475 * The attribute does not exist or needs to be truncated
476 */
477
478 /*
479 * Darn, xattrs need at least 1 byte
480 */
481 char null = '\0';
482
483 DEBUG(10, ("creating or truncating attribute %s on file %s\n",
484 xattr_name, smb_fname->base_name));
485
486 ret = SMB_VFS_SETXATTR(fsp->conn,
487 smb_fname,
488 xattr_name,
489 &null, sizeof(null),
490 flags & O_EXCL ? XATTR_CREATE : 0);
491 if (ret != 0) {
492 goto fail;
493 }
494 }
495
496 sio = (struct stream_io *)VFS_ADD_FSP_EXTENSION(handle, fsp,
497 struct stream_io,
498 NULL);
499 if (sio == NULL) {
500 errno = ENOMEM;
501 goto fail;
502 }
503
504 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
505 xattr_name);
506 /*
507 * so->base needs to be a copy of fsp->fsp_name->base_name,
508 * making it identical to streams_xattr_recheck(). If the
509 * open is changing directories, fsp->fsp_name->base_name
510 * will be the full path from the share root, whilst
511 * smb_fname will be relative to the $cwd.
512 */
513 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
514 fsp->fsp_name->base_name);
515 sio->fsp_name_ptr = fsp->fsp_name;
516 sio->handle = handle;
517 sio->fsp = fsp;
518
519 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
520 errno = ENOMEM;
521 goto fail;
522 }
523
524 return fakefd;
525
526 fail:
527 if (fakefd >= 0) {
528 close(fakefd);
529 fakefd = -1;
530 }
531
532 return -1;
533 }
534
535 static int streams_xattr_unlink(vfs_handle_struct *handle,
536 const struct smb_filename *smb_fname)
537 {
538 NTSTATUS status;
539 int ret = -1;
540 char *xattr_name = NULL;
541
542 if (!is_ntfs_stream_smb_fname(smb_fname)) {
543 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
544 }
545
546 /* If the default stream is requested, just open the base file. */
547 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
548 struct smb_filename *smb_fname_base = NULL;
549
550 smb_fname_base = cp_smb_filename(talloc_tos(), smb_fname);
551 if (smb_fname_base == NULL) {
552 errno = ENOMEM;
553 return -1;
554 }
555
556 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_base);
557
558 TALLOC_FREE(smb_fname_base);
559 return ret;
560 }
561
562 status = streams_xattr_get_name(handle, talloc_tos(),
563 smb_fname->stream_name, &xattr_name);
564 if (!NT_STATUS_IS_OK(status)) {
565 errno = map_errno_from_nt_status(status);
566 goto fail;
567 }
568
569 ret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname, xattr_name);
570
571 if ((ret == -1) && (errno == ENOATTR)) {
572 errno = ENOENT;
573 goto fail;
574 }
575
576 ret = 0;
577
578 fail:
579 TALLOC_FREE(xattr_name);
580 return ret;
581 }
582
583 static int streams_xattr_rename(vfs_handle_struct *handle,
584 const struct smb_filename *smb_fname_src,
585 const struct smb_filename *smb_fname_dst)
586 {
587 NTSTATUS status;
588 int ret = -1;
589 char *src_xattr_name = NULL;
590 char *dst_xattr_name = NULL;
591 bool src_is_stream, dst_is_stream;
592 ssize_t oret;
593 ssize_t nret;
594 struct ea_struct ea;
595
596 src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
597 dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
598
599 if (!src_is_stream && !dst_is_stream) {
600 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src,
601 smb_fname_dst);
602 }
603
604 /* For now don't allow renames from or to the default stream. */
605 if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
606 is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
607 errno = ENOSYS;
608 goto done;
609 }
610
611 /* Don't rename if the streams are identical. */
612 if (strcasecmp_m(smb_fname_src->stream_name,
613 smb_fname_dst->stream_name) == 0) {
614 goto done;
615 }
616
617 /* Get the xattr names. */
618 status = streams_xattr_get_name(handle, talloc_tos(),
619 smb_fname_src->stream_name,
620 &src_xattr_name);
621 if (!NT_STATUS_IS_OK(status)) {
622 errno = map_errno_from_nt_status(status);
623 goto fail;
624 }
625 status = streams_xattr_get_name(handle, talloc_tos(),
626 smb_fname_dst->stream_name,
627 &dst_xattr_name);
628 if (!NT_STATUS_IS_OK(status)) {
629 errno = map_errno_from_nt_status(status);
630 goto fail;
631 }
632
633 /* read the old stream */
634 status = get_ea_value(talloc_tos(), handle->conn, NULL,
635 smb_fname_src, src_xattr_name, &ea);
636 if (!NT_STATUS_IS_OK(status)) {
637 errno = ENOENT;
638 goto fail;
639 }
640
641 /* (over)write the new stream */
642 nret = SMB_VFS_SETXATTR(handle->conn, smb_fname_src,
643 dst_xattr_name, ea.value.data, ea.value.length,
644 0);
645 if (nret < 0) {
646 if (errno == ENOATTR) {
647 errno = ENOENT;
648 }
649 goto fail;
650 }
651
652 /* remove the old stream */
653 oret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname_src,
654 src_xattr_name);
655 if (oret < 0) {
656 if (errno == ENOATTR) {
657 errno = ENOENT;
658 }
659 goto fail;
660 }
661
662 done:
663 errno = 0;
664 ret = 0;
665 fail:
666 TALLOC_FREE(src_xattr_name);
667 TALLOC_FREE(dst_xattr_name);
668 return ret;
669 }
670
671 static NTSTATUS walk_xattr_streams(vfs_handle_struct *handle,
672 files_struct *fsp,
673 const struct smb_filename *smb_fname,
674 bool (*fn)(struct ea_struct *ea,
675 void *private_data),
676 void *private_data)
677 {
678 NTSTATUS status;
679 char **names;
680 size_t i, num_names;
681 struct streams_xattr_config *config;
682
683 SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
684 return NT_STATUS_UNSUCCESSFUL);
685
686 status = get_ea_names_from_file(talloc_tos(),
687 handle->conn,
688 fsp,
689 smb_fname,
690 &names,
691 &num_names);
692 if (!NT_STATUS_IS_OK(status)) {
693 return status;
694 }
695
696 for (i=0; i<num_names; i++) {
697 struct ea_struct ea;
698
699 /*
700 * We want to check with samba_private_attr_name()
701 * whether the xattr name is a private one,
702 * unfortunately it flags xattrs that begin with the
703 * default streams prefix as private.
704 *
705 * By only calling samba_private_attr_name() in case
706 * the xattr does NOT begin with the default prefix,
707 * we know that if it returns 'true' it definitely one
708 * of our internal xattr like "user.DOSATTRIB".
709 */
710 if (strncasecmp_m(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
711 strlen(SAMBA_XATTR_DOSSTREAM_PREFIX)) != 0) {
712 if (samba_private_attr_name(names[i])) {
713 continue;
714 }
715 }
716
717 if (strncmp(names[i], config->prefix,
718 config->prefix_len) != 0) {
719 continue;
720 }
721
722 status = get_ea_value(names,
723 handle->conn,
724 NULL,
725 smb_fname,
726 names[i],
727 &ea);
728 if (!NT_STATUS_IS_OK(status)) {
729 DEBUG(10, ("Could not get ea %s for file %s: %s\n",
730 names[i],
731 smb_fname->base_name,
732 nt_errstr(status)));
733 continue;
734 }
735
736 ea.name = talloc_asprintf(
737 ea.value.data, ":%s%s",
738 names[i] + config->prefix_len,
739 config->store_stream_type ? "" : ":$DATA");
740 if (ea.name == NULL) {
741 DEBUG(0, ("talloc failed\n"));
742 continue;
743 }
744
745 if (!fn(&ea, private_data)) {
746 TALLOC_FREE(ea.value.data);
747 return NT_STATUS_OK;
748 }
749
750 TALLOC_FREE(ea.value.data);
751 }
752
753 TALLOC_FREE(names);
754 return NT_STATUS_OK;
755 }
756
757 static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
758 struct stream_struct **streams,
759 const char *name, off_t size,
760 off_t alloc_size)
761 {
762 struct stream_struct *tmp;
763
764 tmp = talloc_realloc(mem_ctx, *streams, struct stream_struct,
765 (*num_streams)+1);
766 if (tmp == NULL) {
767 return false;
768 }
769
770 tmp[*num_streams].name = talloc_strdup(tmp, name);
771 if (tmp[*num_streams].name == NULL) {
772 return false;
773 }
774
775 tmp[*num_streams].size = size;
776 tmp[*num_streams].alloc_size = alloc_size;
777
778 *streams = tmp;
779 *num_streams += 1;
780 return true;
781 }
782
783 struct streaminfo_state {
784 TALLOC_CTX *mem_ctx;
785 vfs_handle_struct *handle;
786 unsigned int num_streams;
787 struct stream_struct *streams;
788 NTSTATUS status;
789 };
790
791 static bool collect_one_stream(struct ea_struct *ea, void *private_data)
792 {
793 struct streaminfo_state *state =
794 (struct streaminfo_state *)private_data;
795
796 if (!add_one_stream(state->mem_ctx,
797 &state->num_streams, &state->streams,
798 ea->name, ea->value.length-1,
799 smb_roundup(state->handle->conn,
800 ea->value.length-1))) {
801 state->status = NT_STATUS_NO_MEMORY;
802 return false;
803 }
804
805 return true;
806 }
807
808 static NTSTATUS streams_xattr_streaminfo(vfs_handle_struct *handle,
809 struct files_struct *fsp,
810 const struct smb_filename *smb_fname,
811 TALLOC_CTX *mem_ctx,
812 unsigned int *pnum_streams,
813 struct stream_struct **pstreams)
814 {
815 SMB_STRUCT_STAT sbuf;
816 int ret;
817 NTSTATUS status;
818 struct streaminfo_state state;
819
820 ret = vfs_stat_smb_basename(handle->conn, smb_fname, &sbuf);
821 if (ret == -1) {
822 return map_nt_error_from_unix(errno);
823 }
824
825 state.streams = *pstreams;
826 state.num_streams = *pnum_streams;
827 state.mem_ctx = mem_ctx;
828 state.handle = handle;
829 state.status = NT_STATUS_OK;
830
831 if (S_ISLNK(sbuf.st_ex_mode)) {
832 /*
833 * Currently we do't have SMB_VFS_LLISTXATTR
834 * inside the VFS which means there's no way
835 * to cope with a symlink when lp_posix_pathnames().
836 * returns true. For now ignore links.
837 * FIXME - by adding SMB_VFS_LLISTXATTR. JRA.
838 */
839 status = NT_STATUS_OK;
840 } else {
841 status = walk_xattr_streams(handle, fsp, smb_fname,
842 collect_one_stream, &state);
843 }
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_STREAMINFO(handle,
859 fsp,
860 smb_fname,
861 mem_ctx,
862 pnum_streams,
863 pstreams);
864 }
865
866 static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle,
867 enum timestamp_set_resolution *p_ts_res)
868 {
869 return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
870 }
871
872 static int streams_xattr_connect(vfs_handle_struct *handle,
873 const char *service, const char *user)
874 {
875 struct streams_xattr_config *config;
876 const char *default_prefix = SAMBA_XATTR_DOSSTREAM_PREFIX;
877 const char *prefix;
878 int rc;
879
880 rc = SMB_VFS_NEXT_CONNECT(handle, service, user);
881 if (rc != 0) {
882 return rc;
883 }
884
885 config = talloc_zero(handle->conn, struct streams_xattr_config);
886 if (config == NULL) {
887 DEBUG(1, ("talloc_zero() failed\n"));
888 errno = ENOMEM;
889 return -1;
890 }
891
892 prefix = lp_parm_const_string(SNUM(handle->conn),
893 "streams_xattr", "prefix",
894 default_prefix);
895 config->prefix = talloc_strdup(config, prefix);
896 if (config->prefix == NULL) {
897 DEBUG(1, ("talloc_strdup() failed\n"));
898 errno = ENOMEM;
899 return -1;
900 }
901 config->prefix_len = strlen(config->prefix);
902 DEBUG(10, ("streams_xattr using stream prefix: %s\n", config->prefix));
903
904 config->store_stream_type = lp_parm_bool(SNUM(handle->conn),
905 "streams_xattr",
906 "store_stream_type",
907 true);
908
909 SMB_VFS_HANDLE_SET_DATA(handle, config,
910 NULL, struct stream_xattr_config,
911 return -1);
912
913 return 0;
914 }
915
916 static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
917 files_struct *fsp, const void *data,
918 size_t n, off_t offset)
919 {
920 struct stream_io *sio =
921 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
922 struct ea_struct ea;
923 NTSTATUS status;
924 struct smb_filename *smb_fname_base = NULL;
925 int ret;
926
927 DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
928
929 if (sio == NULL) {
930 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
931 }
932
933 if (!streams_xattr_recheck(sio)) {
934 return -1;
935 }
936
937 /* Create an smb_filename with stream_name == NULL. */
938 smb_fname_base = synthetic_smb_fname(talloc_tos(),
939 sio->base,
940 NULL,
941 NULL,
942 fsp->fsp_name->flags);
943 if (smb_fname_base == NULL) {
944 errno = ENOMEM;
945 return -1;
946 }
947
948 status = get_ea_value(talloc_tos(), handle->conn, NULL,
949 smb_fname_base, sio->xattr_name, &ea);
950 if (!NT_STATUS_IS_OK(status)) {
951 return -1;
952 }
953
954 if ((offset + n) > ea.value.length-1) {
955 uint8_t *tmp;
956
957 tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
958 offset + n + 1);
959
960 if (tmp == NULL) {
961 TALLOC_FREE(ea.value.data);
962 errno = ENOMEM;
963 return -1;
964 }
965 ea.value.data = tmp;
966 ea.value.length = offset + n + 1;
967 ea.value.data[offset+n] = 0;
968 }
969
970 memcpy(ea.value.data + offset, data, n);
971
972 ret = SMB_VFS_SETXATTR(fsp->conn,
973 fsp->fsp_name,
974 sio->xattr_name,
975 ea.value.data, ea.value.length, 0);
976 TALLOC_FREE(ea.value.data);
977
978 if (ret == -1) {
979 return -1;
980 }
981
982 return n;
983 }
984
985 static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
986 files_struct *fsp, void *data,
987 size_t n, off_t offset)
988 {
989 struct stream_io *sio =
990 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
991 struct ea_struct ea;
992 NTSTATUS status;
993 size_t length, overlap;
994 struct smb_filename *smb_fname_base = NULL;
995
996 DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
997 (int)offset, (int)n));
998
999 if (sio == NULL) {
1000 return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
1001 }
1002
1003 if (!streams_xattr_recheck(sio)) {
1004 return -1;
1005 }
1006
1007 /* Create an smb_filename with stream_name == NULL. */
1008 smb_fname_base = synthetic_smb_fname(talloc_tos(),
1009 sio->base,
1010 NULL,
1011 NULL,
1012 fsp->fsp_name->flags);
1013 if (smb_fname_base == NULL) {
1014 errno = ENOMEM;
1015 return -1;
1016 }
1017
1018 status = get_ea_value(talloc_tos(), handle->conn, NULL,
1019 smb_fname_base, sio->xattr_name, &ea);
1020 if (!NT_STATUS_IS_OK(status)) {
1021 return -1;
1022 }
1023
1024 length = ea.value.length-1;
1025
1026 DEBUG(10, ("streams_xattr_pread: get_ea_value returned %d bytes\n",
1027 (int)length));
1028
1029 /* Attempt to read past EOF. */
1030 if (length <= offset) {
1031 return 0;
1032 }
1033
1034 overlap = (offset + n) > length ? (length - offset) : n;
1035 memcpy(data, ea.value.data + offset, overlap);
1036
1037 TALLOC_FREE(ea.value.data);
1038 return overlap;
1039 }
1040
1041 struct streams_xattr_pread_state {
1042 ssize_t nread;
1043 struct vfs_aio_state vfs_aio_state;
1044 };
1045
1046 static void streams_xattr_pread_done(struct tevent_req *subreq);
1047
1048 static struct tevent_req *streams_xattr_pread_send(
1049 struct vfs_handle_struct *handle,
1050 TALLOC_CTX *mem_ctx,
1051 struct tevent_context *ev,
1052 struct files_struct *fsp,
1053 void *data,
1054 size_t n, off_t offset)
1055 {
1056 struct tevent_req *req = NULL;
1057 struct tevent_req *subreq = NULL;
1058 struct streams_xattr_pread_state *state = NULL;
1059 struct stream_io *sio =
1060 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1061
1062 req = tevent_req_create(mem_ctx, &state,
1063 struct streams_xattr_pread_state);
1064 if (req == NULL) {
1065 return NULL;
1066 }
1067
1068 if (sio == NULL) {
1069 subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp,
1070 data, n, offset);
1071 if (tevent_req_nomem(req, subreq)) {
1072 return tevent_req_post(req, ev);
1073 }
1074 tevent_req_set_callback(subreq, streams_xattr_pread_done, req);
1075 return req;
1076 }
1077
1078 state->nread = SMB_VFS_PREAD(fsp, data, n, offset);
1079 if (state->nread != n) {
1080 if (state->nread != -1) {
1081 errno = EIO;
1082 }
1083 tevent_req_error(req, errno);
1084 return tevent_req_post(req, ev);
1085 }
1086
1087 tevent_req_done(req);
1088 return tevent_req_post(req, ev);
1089 }
1090
1091 static void streams_xattr_pread_done(struct tevent_req *subreq)
1092 {
1093 struct tevent_req *req = tevent_req_callback_data(
1094 subreq, struct tevent_req);
1095 struct streams_xattr_pread_state *state = tevent_req_data(
1096 req, struct streams_xattr_pread_state);
1097
1098 state->nread = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
1099 TALLOC_FREE(subreq);
1100
1101 if (tevent_req_error(req, state->vfs_aio_state.error)) {
1102 return;
1103 }
1104 tevent_req_done(req);
1105 }
1106
1107 static ssize_t streams_xattr_pread_recv(struct tevent_req *req,
1108 struct vfs_aio_state *vfs_aio_state)
1109 {
1110 struct streams_xattr_pread_state *state = tevent_req_data(
1111 req, struct streams_xattr_pread_state);
1112
1113 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1114 return -1;
1115 }
1116
1117 *vfs_aio_state = state->vfs_aio_state;
1118 return state->nread;
1119 }
1120
1121 struct streams_xattr_pwrite_state {
1122 ssize_t nwritten;
1123 struct vfs_aio_state vfs_aio_state;
1124 };
1125
1126 static void streams_xattr_pwrite_done(struct tevent_req *subreq);
1127
1128 static struct tevent_req *streams_xattr_pwrite_send(
1129 struct vfs_handle_struct *handle,
1130 TALLOC_CTX *mem_ctx,
1131 struct tevent_context *ev,
1132 struct files_struct *fsp,
1133 const void *data,
1134 size_t n, off_t offset)
1135 {
1136 struct tevent_req *req = NULL;
1137 struct tevent_req *subreq = NULL;
1138 struct streams_xattr_pwrite_state *state = NULL;
1139 struct stream_io *sio =
1140 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1141
1142 req = tevent_req_create(mem_ctx, &state,
1143 struct streams_xattr_pwrite_state);
1144 if (req == NULL) {
1145 return NULL;
1146 }
1147
1148 if (sio == NULL) {
1149 subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp,
1150 data, n, offset);
1151 if (tevent_req_nomem(req, subreq)) {
1152 return tevent_req_post(req, ev);
1153 }
1154 tevent_req_set_callback(subreq, streams_xattr_pwrite_done, req);
1155 return req;
1156 }
1157
1158 state->nwritten = SMB_VFS_PWRITE(fsp, data, n, offset);
1159 if (state->nwritten != n) {
1160 if (state->nwritten != -1) {
1161 errno = EIO;
1162 }
1163 tevent_req_error(req, errno);
1164 return tevent_req_post(req, ev);
1165 }
1166
1167 tevent_req_done(req);
1168 return tevent_req_post(req, ev);
1169 }
1170
1171 static void streams_xattr_pwrite_done(struct tevent_req *subreq)
1172 {
1173 struct tevent_req *req = tevent_req_callback_data(
1174 subreq, struct tevent_req);
1175 struct streams_xattr_pwrite_state *state = tevent_req_data(
1176 req, struct streams_xattr_pwrite_state);
1177
1178 state->nwritten = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
1179 TALLOC_FREE(subreq);
1180
1181 if (tevent_req_error(req, state->vfs_aio_state.error)) {
1182 return;
1183 }
1184 tevent_req_done(req);
1185 }
1186
1187 static ssize_t streams_xattr_pwrite_recv(struct tevent_req *req,
1188 struct vfs_aio_state *vfs_aio_state)
1189 {
1190 struct streams_xattr_pwrite_state *state = tevent_req_data(
1191 req, struct streams_xattr_pwrite_state);
1192
1193 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1194 return -1;
1195 }
1196
1197 *vfs_aio_state = state->vfs_aio_state;
1198 return state->nwritten;
1199 }
1200
1201 static int streams_xattr_ftruncate(struct vfs_handle_struct *handle,
1202 struct files_struct *fsp,
1203 off_t offset)
1204 {
1205 int ret;
1206 uint8_t *tmp;
1207 struct ea_struct ea;
1208 NTSTATUS status;
1209 struct stream_io *sio =
1210 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1211 struct smb_filename *smb_fname_base = NULL;
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 /* Create an smb_filename with stream_name == NULL. */
1225 smb_fname_base = synthetic_smb_fname(talloc_tos(),
1226 sio->base,
1227 NULL,
1228 NULL,
1229 fsp->fsp_name->flags);
1230 if (smb_fname_base == NULL) {
1231 errno = ENOMEM;
1232 return -1;
1233 }
1234
1235 status = get_ea_value(talloc_tos(), handle->conn, NULL,
1236 smb_fname_base, sio->xattr_name, &ea);
1237 if (!NT_STATUS_IS_OK(status)) {
1238 return -1;
1239 }
1240
1241 tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
1242 offset + 1);
1243
1244 if (tmp == NULL) {
1245 TALLOC_FREE(ea.value.data);
1246 errno = ENOMEM;
1247 return -1;
1248 }
1249
1250 /* Did we expand ? */
1251 if (ea.value.length < offset + 1) {
1252 memset(&tmp[ea.value.length], '\0',
1253 offset + 1 - ea.value.length);
1254 }
1255
1256 ea.value.data = tmp;
1257 ea.value.length = offset + 1;
1258 ea.value.data[offset] = 0;
1259
1260 ret = SMB_VFS_SETXATTR(fsp->conn,
1261 fsp->fsp_name,
1262 sio->xattr_name,
1263 ea.value.data, ea.value.length, 0);
1264 TALLOC_FREE(ea.value.data);
1265
1266 if (ret == -1) {
1267 return -1;
1268 }
1269
1270 return 0;
1271 }
1272
1273 static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
1274 struct files_struct *fsp,
1275 uint32_t mode,
1276 off_t offset,
1277 off_t len)
1278 {
1279 struct stream_io *sio =
1280 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1281
1282 DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1283 "len = %.0f\n",
1284 fsp_str_dbg(fsp), (double)offset, (double)len));
1285
1286 if (sio == NULL) {
1287 return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1288 }
1289
1290 if (!streams_xattr_recheck(sio)) {
1291 return -1;
1292 }
1293
1294 /* Let the pwrite code path handle it. */
1295 errno = ENOSYS;
1296 return -1;
1297 }
1298
1299 static int streams_xattr_fchown(vfs_handle_struct *handle, files_struct *fsp,
1300 uid_t uid, gid_t gid)
1301 {
1302 struct stream_io *sio =
1303 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1304
1305 if (sio == NULL) {
1306 return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
1307 }
1308
1309 return 0;
1310 }
1311
1312 static int streams_xattr_fchmod(vfs_handle_struct *handle,
1313 files_struct *fsp,
1314 mode_t mode)
1315 {
1316 struct stream_io *sio =
1317 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1318
1319 if (sio == NULL) {
1320 return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1321 }
1322
1323 return 0;
1324 }
1325
1326 static int streams_xattr_fsync(vfs_handle_struct *handle, files_struct *fsp)
1327 {
1328 struct stream_io *sio =
1329 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1330
1331 if (sio == NULL) {
1332 return SMB_VFS_NEXT_FSYNC(handle, fsp);
1333 }
1334
1335 return 0;
1336 }
1337
1338 static ssize_t streams_xattr_fgetxattr(struct vfs_handle_struct *handle,
1339 struct files_struct *fsp,
1340 const char *name,
1341 void *value,
1342 size_t size)
1343 {
1344 struct stream_io *sio =
1345 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1346
1347 if (sio == NULL) {
1348 return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
1349 }
1350
1351 errno = ENOTSUP;
1352 return -1;
1353 }
1354
1355 static ssize_t streams_xattr_flistxattr(struct vfs_handle_struct *handle,
1356 struct files_struct *fsp,
1357 char *list,
1358 size_t size)
1359 {
1360 struct stream_io *sio =
1361 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1362
1363 if (sio == NULL) {
1364 return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
1365 }
1366
1367 errno = ENOTSUP;
1368 return -1;
1369 }
1370
1371 static int streams_xattr_fremovexattr(struct vfs_handle_struct *handle,
1372 struct files_struct *fsp,
1373 const char *name)
1374 {
1375 struct stream_io *sio =
1376 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1377
1378 if (sio == NULL) {
1379 return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
1380 }
1381
1382 errno = ENOTSUP;
1383 return -1;
1384 }
1385
1386 static int streams_xattr_fsetxattr(struct vfs_handle_struct *handle,
1387 struct files_struct *fsp,
1388 const char *name,
1389 const void *value,
1390 size_t size,
1391 int flags)
1392 {
1393 struct stream_io *sio =
1394 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1395
1396 if (sio == NULL) {
1397 return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value,
1398 size, flags);
1399 }
1400
1401 errno = ENOTSUP;
1402 return -1;
1403 }
1404
1405 static int streams_xattr_fchmod_acl(vfs_handle_struct *handle,
1406 files_struct *fsp,
1407 mode_t mode)
1408 {
1409 struct stream_io *sio =
1410 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1411
1412 if (sio == NULL) {
1413 return SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
1414 }
1415
1416 return 0;
1417 }
1418
1419 static SMB_ACL_T streams_xattr_sys_acl_get_fd(vfs_handle_struct *handle,
1420 files_struct *fsp,
1421 TALLOC_CTX *mem_ctx)
1422 {
1423 struct stream_io *sio =
1424 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1425
1426 if (sio == NULL) {
1427 return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, mem_ctx);
1428 }
1429
1430 return SMB_VFS_NEXT_SYS_ACL_GET_FILE(
1431 handle, fsp->base_fsp->fsp_name,
1432 SMB_ACL_TYPE_ACCESS, mem_ctx);
1433 }
1434
1435 static int streams_xattr_sys_acl_set_fd(vfs_handle_struct *handle,
1436 files_struct *fsp,
1437 SMB_ACL_T theacl)
1438 {
1439 struct stream_io *sio =
1440 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1441
1442 if (sio == NULL) {
1443 return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, theacl);
1444 }
1445
1446 return 0;
1447 }
1448
1449 static int streams_xattr_sys_acl_blob_get_fd(vfs_handle_struct *handle,
1450 files_struct *fsp,
1451 TALLOC_CTX *mem_ctx,
1452 char **blob_description,
1453 DATA_BLOB *blob)
1454 {
1455 struct stream_io *sio =
1456 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1457
1458 if (sio == NULL) {
1459 return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
1460 blob_description, blob);
1461 }
1462
1463 return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FILE(
1464 handle, fsp->base_fsp->fsp_name, mem_ctx,
1465 blob_description, blob);
1466 }
1467
1468 static NTSTATUS streams_xattr_fget_nt_acl(vfs_handle_struct *handle,
1469 files_struct *fsp,
1470 uint32_t security_info,
1471 TALLOC_CTX *mem_ctx,
1472 struct security_descriptor **ppdesc)
1473 {
1474 struct stream_io *sio =
1475 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1476
1477 if (sio == NULL) {
1478 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
1479 mem_ctx, ppdesc);
1480 }
1481
1482 return SMB_VFS_NEXT_GET_NT_ACL(handle, fsp->base_fsp->fsp_name,
1483 security_info, mem_ctx, ppdesc);
1484 }
1485
1486 static NTSTATUS streams_xattr_fset_nt_acl(vfs_handle_struct *handle,
1487 files_struct *fsp,
1488 uint32_t security_info_sent,
1489 const struct security_descriptor *psd)
1490 {
1491 struct stream_io *sio =
1492 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1493
1494 if (sio == NULL) {
1495 return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp,
1496 security_info_sent, psd);
1497 }
1498
1499 return NT_STATUS_OK;
1500 }
1501
1502 struct streams_xattr_fsync_state {
1503 int ret;
1504 struct vfs_aio_state vfs_aio_state;
1505 };
1506
1507 static void streams_xattr_fsync_done(struct tevent_req *subreq);
1508
1509 static struct tevent_req *streams_xattr_fsync_send(
1510 struct vfs_handle_struct *handle,
1511 TALLOC_CTX *mem_ctx,
1512 struct tevent_context *ev,
1513 struct files_struct *fsp)
1514 {
1515 struct tevent_req *req = NULL;
1516 struct tevent_req *subreq = NULL;
1517 struct streams_xattr_fsync_state *state = NULL;
1518 struct stream_io *sio =
1519 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1520
1521 req = tevent_req_create(mem_ctx, &state,
1522 struct streams_xattr_fsync_state);
1523 if (req == NULL) {
1524 return NULL;
1525 }
1526
1527 if (sio == NULL) {
1528 subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
1529 if (tevent_req_nomem(req, subreq)) {
1530 return tevent_req_post(req, ev);
1531 }
1532 tevent_req_set_callback(subreq, streams_xattr_fsync_done, req);
1533 return req;
1534 }
1535
1536 /*
1537 * There's no pathname based sync variant and we don't have access to
1538 * the basefile handle, so we can't do anything here.
1539 */
1540
1541 tevent_req_done(req);
1542 return tevent_req_post(req, ev);
1543 }
1544
1545 static void streams_xattr_fsync_done(struct tevent_req *subreq)
1546 {
1547 struct tevent_req *req = tevent_req_callback_data(
1548 subreq, struct tevent_req);
1549 struct streams_xattr_fsync_state *state = tevent_req_data(
1550 req, struct streams_xattr_fsync_state);
1551
1552 state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->vfs_aio_state);
1553 TALLOC_FREE(subreq);
1554 if (state->ret != 0) {
1555 tevent_req_error(req, errno);
1556 return;
1557 }
1558
1559 tevent_req_done(req);
1560 }
1561
1562 static int streams_xattr_fsync_recv(struct tevent_req *req,
1563 struct vfs_aio_state *vfs_aio_state)
1564 {
1565 struct streams_xattr_fsync_state *state = tevent_req_data(
1566 req, struct streams_xattr_fsync_state);
1567
1568 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1569 return -1;
1570 }
1571
1572 *vfs_aio_state = state->vfs_aio_state;
1573 return state->ret;
1574 }
1575
1576 static bool streams_xattr_lock(vfs_handle_struct *handle,
1577 files_struct *fsp,
1578 int op,
1579 off_t offset,
1580 off_t count,
1581 int type)
1582 {
1583 struct stream_io *sio =
1584 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1585
1586 if (sio == NULL) {
1587 return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
1588 }
1589
1590 return true;
1591 }
1592
1593 static bool streams_xattr_getlock(vfs_handle_struct *handle,
1594 files_struct *fsp,
1595 off_t *poffset,
1596 off_t *pcount,
1597 int *ptype,
1598 pid_t *ppid)
1599 {
1600 struct stream_io *sio =
1601 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1602
1603 if (sio == NULL) {
1604 return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset,
1605 pcount, ptype, ppid);
1606 }
1607
1608 errno = ENOTSUP;
1609 return false;
1610 }
1611
1612 static int streams_xattr_kernel_flock(vfs_handle_struct *handle,
1613 files_struct *fsp,
1614 uint32_t share_mode,
1615 uint32_t access_mask)
1616 {
1617 struct stream_io *sio =
1618 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1619
1620 if (sio == NULL) {
1621 return SMB_VFS_NEXT_KERNEL_FLOCK(handle, fsp,
1622 share_mode, access_mask);
1623 }
1624
1625 return 0;
1626 }
1627
1628 static int streams_xattr_linux_setlease(vfs_handle_struct *handle,
1629 files_struct *fsp,
1630 int leasetype)
1631 {
1632 struct stream_io *sio =
1633 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1634
1635 if (sio == NULL) {
1636 return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
1637 }
1638
1639 return 0;
1640 }
1641
1642 static bool streams_xattr_strict_lock_check(struct vfs_handle_struct *handle,
1643 files_struct *fsp,
1644 struct lock_struct *plock)
1645 {
1646 struct stream_io *sio =
1647 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1648
1649 if (sio == NULL) {
1650 return SMB_VFS_NEXT_STRICT_LOCK_CHECK(handle, fsp, plock);
1651 }
1652
1653 return true;
1654 }
1655
1656 static struct vfs_fn_pointers vfs_streams_xattr_fns = {
1657 .fs_capabilities_fn = streams_xattr_fs_capabilities,
1658 .connect_fn = streams_xattr_connect,
1659 .open_fn = streams_xattr_open,
1660 .stat_fn = streams_xattr_stat,
1661 .fstat_fn = streams_xattr_fstat,
1662 .lstat_fn = streams_xattr_lstat,
1663 .pread_fn = streams_xattr_pread,
1664 .pwrite_fn = streams_xattr_pwrite,
1665 .pread_send_fn = streams_xattr_pread_send,
1666 .pread_recv_fn = streams_xattr_pread_recv,
1667 .pwrite_send_fn = streams_xattr_pwrite_send,
1668 .pwrite_recv_fn = streams_xattr_pwrite_recv,
1669 .unlink_fn = streams_xattr_unlink,
1670 .rename_fn = streams_xattr_rename,
1671 .ftruncate_fn = streams_xattr_ftruncate,
1672 .fallocate_fn = streams_xattr_fallocate,
1673 .streaminfo_fn = streams_xattr_streaminfo,
1674
1675 .fsync_send_fn = streams_xattr_fsync_send,
1676 .fsync_recv_fn = streams_xattr_fsync_recv,
1677
1678 .lock_fn = streams_xattr_lock,
1679 .getlock_fn = streams_xattr_getlock,
1680 .kernel_flock_fn = streams_xattr_kernel_flock,
1681 .linux_setlease_fn = streams_xattr_linux_setlease,
1682 .strict_lock_check_fn = streams_xattr_strict_lock_check,
1683
1684 .fchown_fn = streams_xattr_fchown,
1685 .fchmod_fn = streams_xattr_fchmod,
1686 .fsync_fn = streams_xattr_fsync,
1687
1688 .fgetxattr_fn = streams_xattr_fgetxattr,
1689 .flistxattr_fn = streams_xattr_flistxattr,
1690 .fremovexattr_fn = streams_xattr_fremovexattr,
1691 .fsetxattr_fn = streams_xattr_fsetxattr,
1692
1693 .fchmod_acl_fn = streams_xattr_fchmod_acl,
1694
1695 .sys_acl_get_fd_fn = streams_xattr_sys_acl_get_fd,
1696 .sys_acl_blob_get_fd_fn = streams_xattr_sys_acl_blob_get_fd,
1697 .sys_acl_set_fd_fn = streams_xattr_sys_acl_set_fd,
1698
1699 .fget_nt_acl_fn = streams_xattr_fget_nt_acl,
1700 .fset_nt_acl_fn = streams_xattr_fset_nt_acl,
1701 };
1702
1703 NTSTATUS vfs_streams_xattr_init(TALLOC_CTX *);
1704 NTSTATUS vfs_streams_xattr_init(TALLOC_CTX *ctx)
1705 {
1706 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
1707 &vfs_streams_xattr_fns);
1708 }
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