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vfs_ceph: Replace libceph with libcephfs in comments
[Samba.git] / source3 / modules / vfs_ceph.c
blobaa68b5573c8f0cfe4514d389f5f2ec22d4528aca
1 /*
2 Unix SMB/CIFS implementation.
3 Wrap disk only vfs functions to sidestep dodgy compilers.
4 Copyright (C) Tim Potter 1998
5 Copyright (C) Jeremy Allison 2007
6 Copyright (C) Brian Chrisman 2011 <bchrisman@gmail.com>
7 Copyright (C) Richard Sharpe 2011 <realrichardsharpe@gmail.com>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 /*
24 * This VFS only works with the libcephfs.so user-space client. It is not needed
25 * if you are using the kernel client or the FUSE client.
26 *
27 * Add the following smb.conf parameter to each share that will be hosted on
28 * Ceph:
29 *
30 * vfs objects = [any others you need go here] ceph
31 */
32
33 #include "includes.h"
34 #include "smbd/smbd.h"
35 #include "system/filesys.h"
36 #include <dirent.h>
37 #include <sys/statvfs.h>
38 #include "cephfs/libcephfs.h"
39 #include "smbprofile.h"
40 #include "modules/posixacl_xattr.h"
41 #include "lib/util/tevent_unix.h"
42
43 #undef DBGC_CLASS
44 #define DBGC_CLASS DBGC_VFS
45
46 #ifndef LIBCEPHFS_VERSION
47 #define LIBCEPHFS_VERSION(maj, min, extra) ((maj << 16) + (min << 8) + extra)
48 #define LIBCEPHFS_VERSION_CODE LIBCEPHFS_VERSION(0, 0, 0)
49 #endif
50
51 /*
52 * Use %llu whenever we have a 64bit unsigned int, and cast to (long long unsigned)
53 */
54 #define llu(_var) ((long long unsigned)_var)
55
56 /*
57 * Note, libcephfs's return code model is to return -errno! So we have to
58 * convert to what Samba expects, with is set errno to -return and return -1
59 */
60 #define WRAP_RETURN(_res) \
61 errno = 0; \
62 if (_res < 0) { \
63 errno = -_res; \
64 return -1; \
65 } \
66 return _res \
67
68 /*
69 * Track unique connections, as virtual mounts, to cephfs file systems.
70 * Individual mounts will be set on the handle->data attribute, but
71 * the mounts themselves will be shared so as not to spawn extra mounts
72 * to the same cephfs.
73 *
74 * Individual mounts are IDed by a 'cookie' value that is a string built
75 * from identifying parameters found in smb.conf.
76 */
77
78 static struct cephmount_cached {
79 char *cookie;
80 uint32_t count;
81 struct ceph_mount_info *mount;
82 struct cephmount_cached *next, *prev;
83 } *cephmount_cached;
84
85 static int cephmount_cache_add(const char *cookie,
86 struct ceph_mount_info *mount)
87 {
88 struct cephmount_cached *entry = NULL;
89
90 entry = talloc_zero(NULL, struct cephmount_cached);
91 if (entry == NULL) {
92 errno = ENOMEM;
93 return -1;
94 }
95
96 entry->cookie = talloc_strdup(entry, cookie);
97 if (entry->cookie == NULL) {
98 talloc_free(entry);
99 errno = ENOMEM;
100 return -1;
101 }
102
103 entry->mount = mount;
104 entry->count = 1;
105
106 DBG_DEBUG("adding mount cache entry for %s\n", entry->cookie);
107 DLIST_ADD(cephmount_cached, entry);
108 return 0;
109 }
110
111 static struct ceph_mount_info *cephmount_cache_update(const char *cookie)
112 {
113 struct cephmount_cached *entry = NULL;
114
115 for (entry = cephmount_cached; entry; entry = entry->next) {
116 if (strcmp(entry->cookie, cookie) == 0) {
117 entry->count++;
118 DBG_DEBUG("updated mount cache: count is [%"
119 PRIu32 "]\n", entry->count);
120 return entry->mount;
121 }
122 }
123
124 errno = ENOENT;
125 return NULL;
126 }
127
128 static int cephmount_cache_remove(struct ceph_mount_info *mount)
129 {
130 struct cephmount_cached *entry = NULL;
131
132 for (entry = cephmount_cached; entry; entry = entry->next) {
133 if (entry->mount == mount) {
134 if (--entry->count) {
135 DBG_DEBUG("updated mount cache: count is [%"
136 PRIu32 "]\n", entry->count);
137 return entry->count;
138 }
139
140 DBG_DEBUG("removing mount cache entry for %s\n",
141 entry->cookie);
142 DLIST_REMOVE(cephmount_cached, entry);
143 talloc_free(entry);
144 return 0;
145 }
146 }
147 errno = ENOENT;
148 return -1;
149 }
150
151 static char *cephmount_get_cookie(TALLOC_CTX * mem_ctx, const int snum)
152 {
153 const char *conf_file =
154 lp_parm_const_string(snum, "ceph", "config_file", ".");
155 const char *user_id = lp_parm_const_string(snum, "ceph", "user_id", "");
156 const char *fsname =
157 lp_parm_const_string(snum, "ceph", "filesystem", "");
158 return talloc_asprintf(mem_ctx, "(%s/%s/%s)", conf_file, user_id,
159 fsname);
160 }
161
162 static int cephmount_select_fs(struct ceph_mount_info *mnt, const char *fsname)
163 {
164 /*
165 * ceph_select_filesystem was added in ceph 'nautilus' (v14).
166 * Earlier versions of libcephfs will lack that API function.
167 * At the time of this writing (Feb 2023) all versions of ceph
168 * supported by ceph upstream have this function.
169 */
170 #if defined(HAVE_CEPH_SELECT_FILESYSTEM)
171 DBG_DEBUG("[CEPH] calling: ceph_select_filesystem with %s\n", fsname);
172 return ceph_select_filesystem(mnt, fsname);
173 #else
174 DBG_ERR("[CEPH] ceph_select_filesystem not available\n");
175 return -ENOTSUP;
176 #endif
177 }
178
179 static struct ceph_mount_info *cephmount_mount_fs(const int snum)
180 {
181 int ret;
182 char buf[256];
183 struct ceph_mount_info *mnt = NULL;
184 /* if config_file and/or user_id are NULL, ceph will use defaults */
185 const char *conf_file =
186 lp_parm_const_string(snum, "ceph", "config_file", NULL);
187 const char *user_id =
188 lp_parm_const_string(snum, "ceph", "user_id", NULL);
189 const char *fsname =
190 lp_parm_const_string(snum, "ceph", "filesystem", NULL);
191
192 DBG_DEBUG("[CEPH] calling: ceph_create\n");
193 ret = ceph_create(&mnt, user_id);
194 if (ret) {
195 errno = -ret;
196 return NULL;
197 }
198
199 DBG_DEBUG("[CEPH] calling: ceph_conf_read_file with %s\n",
200 (conf_file == NULL ? "default path" : conf_file));
201 ret = ceph_conf_read_file(mnt, conf_file);
202 if (ret) {
203 goto err_cm_release;
204 }
205
206 DBG_DEBUG("[CEPH] calling: ceph_conf_get\n");
207 ret = ceph_conf_get(mnt, "log file", buf, sizeof(buf));
208 if (ret < 0) {
209 goto err_cm_release;
210 }
211
212 /* libcephfs disables POSIX ACL support by default, enable it... */
213 ret = ceph_conf_set(mnt, "client_acl_type", "posix_acl");
214 if (ret < 0) {
215 goto err_cm_release;
216 }
217 /* tell libcephfs to perform local permission checks */
218 ret = ceph_conf_set(mnt, "fuse_default_permissions", "false");
219 if (ret < 0) {
220 goto err_cm_release;
221 }
222 /*
223 * select a cephfs file system to use:
224 * In ceph, multiple file system support has been stable since 'pacific'.
225 * Permit different shares to access different file systems.
226 */
227 if (fsname != NULL) {
228 ret = cephmount_select_fs(mnt, fsname);
229 if (ret < 0) {
230 goto err_cm_release;
231 }
232 }
233
234 DBG_DEBUG("[CEPH] calling: ceph_mount\n");
235 ret = ceph_mount(mnt, NULL);
236 if (ret >= 0) {
237 goto cm_done;
238 }
239
240 err_cm_release:
241 ceph_release(mnt);
242 mnt = NULL;
243 DBG_DEBUG("[CEPH] Error mounting fs: %s\n", strerror(-ret));
244 cm_done:
245 /*
246 * Handle the error correctly. Ceph returns -errno.
247 */
248 if (ret) {
249 errno = -ret;
250 }
251 return mnt;
252 }
253
254 /* Check for NULL pointer parameters in cephwrap_* functions */
255
256 /* We don't want to have NULL function pointers lying around. Someone
257 is sure to try and execute them. These stubs are used to prevent
258 this possibility. */
259
260 static int cephwrap_connect(struct vfs_handle_struct *handle,
261 const char *service, const char *user)
262 {
263 int ret = 0;
264 struct ceph_mount_info *cmount = NULL;
265 int snum = SNUM(handle->conn);
266 char *cookie = cephmount_get_cookie(handle, snum);
267 if (cookie == NULL) {
268 return -1;
269 }
270
271 cmount = cephmount_cache_update(cookie);
272 if (cmount != NULL) {
273 goto connect_ok;
274 }
275
276 cmount = cephmount_mount_fs(snum);
277 if (cmount == NULL) {
278 ret = -1;
279 goto connect_fail;
280 }
281 ret = cephmount_cache_add(cookie, cmount);
282 if (ret) {
283 goto connect_fail;
284 }
285
286 connect_ok:
287 handle->data = cmount;
288 /*
289 * Unless we have an async implementation of getxattrat turn this off.
290 */
291 lp_do_parameter(SNUM(handle->conn), "smbd async dosmode", "false");
292 connect_fail:
293 talloc_free(cookie);
294 return ret;
295 }
296
297 static void cephwrap_disconnect(struct vfs_handle_struct *handle)
298 {
299 int ret = cephmount_cache_remove(handle->data);
300 if (ret < 0) {
301 DBG_ERR("failed to remove ceph mount from cache: %s\n",
302 strerror(errno));
303 return;
304 }
305 if (ret > 0) {
306 DBG_DEBUG("mount cache entry still in use\n");
307 return;
308 }
309
310 ret = ceph_unmount(handle->data);
311 if (ret < 0) {
312 DBG_ERR("[CEPH] failed to unmount: %s\n", strerror(-ret));
313 }
314
315 ret = ceph_release(handle->data);
316 if (ret < 0) {
317 DBG_ERR("[CEPH] failed to release: %s\n", strerror(-ret));
318 }
319 handle->data = NULL;
320 }
321
322 /* Disk operations */
323
324 static uint64_t cephwrap_disk_free(struct vfs_handle_struct *handle,
325 const struct smb_filename *smb_fname,
326 uint64_t *bsize,
327 uint64_t *dfree,
328 uint64_t *dsize)
329 {
330 struct statvfs statvfs_buf;
331 int ret;
332
333 if (!(ret = ceph_statfs(handle->data, smb_fname->base_name,
334 &statvfs_buf))) {
335 /*
336 * Provide all the correct values.
337 */
338 *bsize = statvfs_buf.f_bsize;
339 *dfree = statvfs_buf.f_bavail;
340 *dsize = statvfs_buf.f_blocks;
341 DBG_DEBUG("[CEPH] bsize: %llu, dfree: %llu, dsize: %llu\n",
342 llu(*bsize), llu(*dfree), llu(*dsize));
343 return *dfree;
344 } else {
345 DBG_DEBUG("[CEPH] ceph_statfs returned %d\n", ret);
346 WRAP_RETURN(ret);
347 }
348 }
349
350 static int cephwrap_get_quota(struct vfs_handle_struct *handle,
351 const struct smb_filename *smb_fname,
352 enum SMB_QUOTA_TYPE qtype,
353 unid_t id,
354 SMB_DISK_QUOTA *qt)
355 {
356 /* libcephfs: Ceph does not implement this */
357 #if 0
358 /* was ifdef HAVE_SYS_QUOTAS */
359 int ret;
360
361 ret = ceph_get_quota(handle->conn->connectpath, qtype, id, qt);
362
363 if (ret) {
364 errno = -ret;
365 ret = -1;
366 }
367
368 return ret;
369 #else
370 errno = ENOSYS;
371 return -1;
372 #endif
373 }
374
375 static int cephwrap_set_quota(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
376 {
377 /* libcephfs: Ceph does not implement this */
378 #if 0
379 /* was ifdef HAVE_SYS_QUOTAS */
380 int ret;
381
382 ret = ceph_set_quota(handle->conn->connectpath, qtype, id, qt);
383 if (ret) {
384 errno = -ret;
385 ret = -1;
386 }
387
388 return ret;
389 #else
390 WRAP_RETURN(-ENOSYS);
391 #endif
392 }
393
394 static int cephwrap_statvfs(struct vfs_handle_struct *handle,
395 const struct smb_filename *smb_fname,
396 struct vfs_statvfs_struct *statbuf)
397 {
398 struct statvfs statvfs_buf;
399 int ret;
400
401 ret = ceph_statfs(handle->data, smb_fname->base_name, &statvfs_buf);
402 if (ret < 0) {
403 WRAP_RETURN(ret);
404 }
405
406 statbuf->OptimalTransferSize = statvfs_buf.f_frsize;
407 statbuf->BlockSize = statvfs_buf.f_bsize;
408 statbuf->TotalBlocks = statvfs_buf.f_blocks;
409 statbuf->BlocksAvail = statvfs_buf.f_bfree;
410 statbuf->UserBlocksAvail = statvfs_buf.f_bavail;
411 statbuf->TotalFileNodes = statvfs_buf.f_files;
412 statbuf->FreeFileNodes = statvfs_buf.f_ffree;
413 statbuf->FsIdentifier = statvfs_buf.f_fsid;
414 DBG_DEBUG("[CEPH] f_bsize: %ld, f_blocks: %ld, f_bfree: %ld, f_bavail: %ld\n",
415 (long int)statvfs_buf.f_bsize, (long int)statvfs_buf.f_blocks,
416 (long int)statvfs_buf.f_bfree, (long int)statvfs_buf.f_bavail);
417
418 return ret;
419 }
420
421 static uint32_t cephwrap_fs_capabilities(struct vfs_handle_struct *handle,
422 enum timestamp_set_resolution *p_ts_res)
423 {
424 uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
425
426 *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
427
428 return caps;
429 }
430
431 /* Directory operations */
432
433 static DIR *cephwrap_fdopendir(struct vfs_handle_struct *handle,
434 struct files_struct *fsp,
435 const char *mask,
436 uint32_t attributes)
437 {
438 int ret = 0;
439 struct ceph_dir_result *result;
440 DBG_DEBUG("[CEPH] fdopendir(%p, %p)\n", handle, fsp);
441
442 ret = ceph_opendir(handle->data, fsp->fsp_name->base_name, &result);
443 if (ret < 0) {
444 result = NULL;
445 errno = -ret; /* We return result which is NULL in this case */
446 }
447
448 DBG_DEBUG("[CEPH] fdopendir(...) = %d\n", ret);
449 return (DIR *) result;
450 }
451
452 static struct dirent *cephwrap_readdir(struct vfs_handle_struct *handle,
453 struct files_struct *dirfsp,
454 DIR *dirp)
455 {
456 struct dirent *result;
457
458 DBG_DEBUG("[CEPH] readdir(%p, %p)\n", handle, dirp);
459 result = ceph_readdir(handle->data, (struct ceph_dir_result *) dirp);
460 DBG_DEBUG("[CEPH] readdir(...) = %p\n", result);
461
462 return result;
463 }
464
465 static void cephwrap_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
466 {
467 DBG_DEBUG("[CEPH] rewinddir(%p, %p)\n", handle, dirp);
468 ceph_rewinddir(handle->data, (struct ceph_dir_result *) dirp);
469 }
470
471 static int cephwrap_mkdirat(struct vfs_handle_struct *handle,
472 files_struct *dirfsp,
473 const struct smb_filename *smb_fname,
474 mode_t mode)
475 {
476 struct smb_filename *full_fname = NULL;
477 int result;
478
479 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
480 dirfsp,
481 smb_fname);
482 if (full_fname == NULL) {
483 return -1;
484 }
485
486 DBG_DEBUG("[CEPH] mkdir(%p, %s)\n",
487 handle, smb_fname_str_dbg(full_fname));
488
489 result = ceph_mkdir(handle->data, full_fname->base_name, mode);
490
491 TALLOC_FREE(full_fname);
492
493 return WRAP_RETURN(result);
494 }
495
496 static int cephwrap_closedir(struct vfs_handle_struct *handle, DIR *dirp)
497 {
498 int result;
499
500 DBG_DEBUG("[CEPH] closedir(%p, %p)\n", handle, dirp);
501 result = ceph_closedir(handle->data, (struct ceph_dir_result *) dirp);
502 DBG_DEBUG("[CEPH] closedir(...) = %d\n", result);
503 WRAP_RETURN(result);
504 }
505
506 /* File operations */
507
508 static int cephwrap_openat(struct vfs_handle_struct *handle,
509 const struct files_struct *dirfsp,
510 const struct smb_filename *smb_fname,
511 files_struct *fsp,
512 const struct vfs_open_how *how)
513 {
514 int flags = how->flags;
515 mode_t mode = how->mode;
516 struct smb_filename *name = NULL;
517 bool have_opath = false;
518 bool became_root = false;
519 int result = -ENOENT;
520
521 if (how->resolve != 0) {
522 errno = ENOSYS;
523 return -1;
524 }
525
526 /*
527 * ceph doesn't have openat().
528 */
529 if (fsp_get_pathref_fd(dirfsp) != AT_FDCWD) {
530 name = full_path_from_dirfsp_atname(talloc_tos(),
531 dirfsp,
532 smb_fname);
533 if (name == NULL) {
534 return -1;
535 }
536 smb_fname = name;
537 }
538
539 DBG_DEBUG("[CEPH] openat(%p, %s, %p, %d, %d)\n", handle,
540 smb_fname_str_dbg(smb_fname), fsp, flags, mode);
541
542 if (smb_fname->stream_name) {
543 goto out;
544 }
545
546 #ifdef O_PATH
547 have_opath = true;
548 if (fsp->fsp_flags.is_pathref) {
549 flags |= O_PATH;
550 }
551 #endif
552
553 if (fsp->fsp_flags.is_pathref && !have_opath) {
554 become_root();
555 became_root = true;
556 }
557
558 result = ceph_open(handle->data, smb_fname->base_name, flags, mode);
559
560 if (became_root) {
561 unbecome_root();
562 }
563
564 out:
565 TALLOC_FREE(name);
566 fsp->fsp_flags.have_proc_fds = false;
567 DBG_DEBUG("[CEPH] open(...) = %d\n", result);
568 WRAP_RETURN(result);
569 }
570
571 static int cephwrap_close(struct vfs_handle_struct *handle, files_struct *fsp)
572 {
573 int result;
574
575 DBG_DEBUG("[CEPH] close(%p, %p)\n", handle, fsp);
576 result = ceph_close(handle->data, fsp_get_pathref_fd(fsp));
577 DBG_DEBUG("[CEPH] close(...) = %d\n", result);
578
579 WRAP_RETURN(result);
580 }
581
582 static ssize_t cephwrap_pread(struct vfs_handle_struct *handle, files_struct *fsp, void *data,
583 size_t n, off_t offset)
584 {
585 ssize_t result;
586
587 DBG_DEBUG("[CEPH] pread(%p, %p, %p, %llu, %llu)\n", handle, fsp, data, llu(n), llu(offset));
588
589 result = ceph_read(handle->data, fsp_get_io_fd(fsp), data, n, offset);
590 DBG_DEBUG("[CEPH] pread(...) = %llu\n", llu(result));
591 WRAP_RETURN(result);
592 }
593
594 struct cephwrap_pread_state {
595 ssize_t bytes_read;
596 struct vfs_aio_state vfs_aio_state;
597 };
598
599 /*
600 * Fake up an async ceph read by calling the synchronous API.
601 */
602 static struct tevent_req *cephwrap_pread_send(struct vfs_handle_struct *handle,
603 TALLOC_CTX *mem_ctx,
604 struct tevent_context *ev,
605 struct files_struct *fsp,
606 void *data,
607 size_t n, off_t offset)
608 {
609 struct tevent_req *req = NULL;
610 struct cephwrap_pread_state *state = NULL;
611 int ret = -1;
612
613 DBG_DEBUG("[CEPH] %s\n", __func__);
614 req = tevent_req_create(mem_ctx, &state, struct cephwrap_pread_state);
615 if (req == NULL) {
616 return NULL;
617 }
618
619 ret = ceph_read(handle->data, fsp_get_io_fd(fsp), data, n, offset);
620 if (ret < 0) {
621 /* ceph returns -errno on error. */
622 tevent_req_error(req, -ret);
623 return tevent_req_post(req, ev);
624 }
625
626 state->bytes_read = ret;
627 tevent_req_done(req);
628 /* Return and schedule the completion of the call. */
629 return tevent_req_post(req, ev);
630 }
631
632 static ssize_t cephwrap_pread_recv(struct tevent_req *req,
633 struct vfs_aio_state *vfs_aio_state)
634 {
635 struct cephwrap_pread_state *state =
636 tevent_req_data(req, struct cephwrap_pread_state);
637
638 DBG_DEBUG("[CEPH] %s\n", __func__);
639 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
640 return -1;
641 }
642 *vfs_aio_state = state->vfs_aio_state;
643 return state->bytes_read;
644 }
645
646 static ssize_t cephwrap_pwrite(struct vfs_handle_struct *handle, files_struct *fsp, const void *data,
647 size_t n, off_t offset)
648 {
649 ssize_t result;
650
651 DBG_DEBUG("[CEPH] pwrite(%p, %p, %p, %llu, %llu)\n", handle, fsp, data, llu(n), llu(offset));
652 result = ceph_write(handle->data, fsp_get_io_fd(fsp), data, n, offset);
653 DBG_DEBUG("[CEPH] pwrite(...) = %llu\n", llu(result));
654 WRAP_RETURN(result);
655 }
656
657 struct cephwrap_pwrite_state {
658 ssize_t bytes_written;
659 struct vfs_aio_state vfs_aio_state;
660 };
661
662 /*
663 * Fake up an async ceph write by calling the synchronous API.
664 */
665 static struct tevent_req *cephwrap_pwrite_send(struct vfs_handle_struct *handle,
666 TALLOC_CTX *mem_ctx,
667 struct tevent_context *ev,
668 struct files_struct *fsp,
669 const void *data,
670 size_t n, off_t offset)
671 {
672 struct tevent_req *req = NULL;
673 struct cephwrap_pwrite_state *state = NULL;
674 int ret = -1;
675
676 DBG_DEBUG("[CEPH] %s\n", __func__);
677 req = tevent_req_create(mem_ctx, &state, struct cephwrap_pwrite_state);
678 if (req == NULL) {
679 return NULL;
680 }
681
682 ret = ceph_write(handle->data, fsp_get_io_fd(fsp), data, n, offset);
683 if (ret < 0) {
684 /* ceph returns -errno on error. */
685 tevent_req_error(req, -ret);
686 return tevent_req_post(req, ev);
687 }
688
689 state->bytes_written = ret;
690 tevent_req_done(req);
691 /* Return and schedule the completion of the call. */
692 return tevent_req_post(req, ev);
693 }
694
695 static ssize_t cephwrap_pwrite_recv(struct tevent_req *req,
696 struct vfs_aio_state *vfs_aio_state)
697 {
698 struct cephwrap_pwrite_state *state =
699 tevent_req_data(req, struct cephwrap_pwrite_state);
700
701 DBG_DEBUG("[CEPH] %s\n", __func__);
702 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
703 return -1;
704 }
705 *vfs_aio_state = state->vfs_aio_state;
706 return state->bytes_written;
707 }
708
709 static off_t cephwrap_lseek(struct vfs_handle_struct *handle, files_struct *fsp, off_t offset, int whence)
710 {
711 off_t result = 0;
712
713 DBG_DEBUG("[CEPH] cephwrap_lseek\n");
714 result = ceph_lseek(handle->data, fsp_get_io_fd(fsp), offset, whence);
715 WRAP_RETURN(result);
716 }
717
718 static ssize_t cephwrap_sendfile(struct vfs_handle_struct *handle, int tofd, files_struct *fromfsp, const DATA_BLOB *hdr,
719 off_t offset, size_t n)
720 {
721 /*
722 * We cannot support sendfile because libcephfs is in user space.
723 */
724 DBG_DEBUG("[CEPH] cephwrap_sendfile\n");
725 errno = ENOTSUP;
726 return -1;
727 }
728
729 static ssize_t cephwrap_recvfile(struct vfs_handle_struct *handle,
730 int fromfd,
731 files_struct *tofsp,
732 off_t offset,
733 size_t n)
734 {
735 /*
736 * We cannot support recvfile because libcephfs is in user space.
737 */
738 DBG_DEBUG("[CEPH] cephwrap_recvfile\n");
739 errno=ENOTSUP;
740 return -1;
741 }
742
743 static int cephwrap_renameat(struct vfs_handle_struct *handle,
744 files_struct *srcfsp,
745 const struct smb_filename *smb_fname_src,
746 files_struct *dstfsp,
747 const struct smb_filename *smb_fname_dst)
748 {
749 struct smb_filename *full_fname_src = NULL;
750 struct smb_filename *full_fname_dst = NULL;
751 int result = -1;
752
753 DBG_DEBUG("[CEPH] cephwrap_renameat\n");
754 if (smb_fname_src->stream_name || smb_fname_dst->stream_name) {
755 errno = ENOENT;
756 return result;
757 }
758
759 full_fname_src = full_path_from_dirfsp_atname(talloc_tos(),
760 srcfsp,
761 smb_fname_src);
762 if (full_fname_src == NULL) {
763 errno = ENOMEM;
764 return -1;
765 }
766 full_fname_dst = full_path_from_dirfsp_atname(talloc_tos(),
767 dstfsp,
768 smb_fname_dst);
769 if (full_fname_dst == NULL) {
770 TALLOC_FREE(full_fname_src);
771 errno = ENOMEM;
772 return -1;
773 }
774
775 result = ceph_rename(handle->data,
776 full_fname_src->base_name,
777 full_fname_dst->base_name);
778
779 TALLOC_FREE(full_fname_src);
780 TALLOC_FREE(full_fname_dst);
781
782 WRAP_RETURN(result);
783 }
784
785 /*
786 * Fake up an async ceph fsync by calling the synchronous API.
787 */
788
789 static struct tevent_req *cephwrap_fsync_send(struct vfs_handle_struct *handle,
790 TALLOC_CTX *mem_ctx,
791 struct tevent_context *ev,
792 files_struct *fsp)
793 {
794 struct tevent_req *req = NULL;
795 struct vfs_aio_state *state = NULL;
796 int ret = -1;
797
798 DBG_DEBUG("[CEPH] cephwrap_fsync_send\n");
799
800 req = tevent_req_create(mem_ctx, &state, struct vfs_aio_state);
801 if (req == NULL) {
802 return NULL;
803 }
804
805 /* Make sync call. */
806 ret = ceph_fsync(handle->data, fsp_get_io_fd(fsp), false);
807
808 if (ret != 0) {
809 /* ceph_fsync returns -errno on error. */
810 tevent_req_error(req, -ret);
811 return tevent_req_post(req, ev);
812 }
813
814 /* Mark it as done. */
815 tevent_req_done(req);
816 /* Return and schedule the completion of the call. */
817 return tevent_req_post(req, ev);
818 }
819
820 static int cephwrap_fsync_recv(struct tevent_req *req,
821 struct vfs_aio_state *vfs_aio_state)
822 {
823 struct vfs_aio_state *state =
824 tevent_req_data(req, struct vfs_aio_state);
825
826 DBG_DEBUG("[CEPH] cephwrap_fsync_recv\n");
827
828 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
829 return -1;
830 }
831 *vfs_aio_state = *state;
832 return 0;
833 }
834
835 #define SAMBA_STATX_ATTR_MASK (CEPH_STATX_BASIC_STATS|CEPH_STATX_BTIME)
836
837 static void init_stat_ex_from_ceph_statx(struct stat_ex *dst, const struct ceph_statx *stx)
838 {
839 DBG_DEBUG("[CEPH]\tstx = {dev = %llx, ino = %llu, mode = 0x%x, "
840 "nlink = %llu, uid = %d, gid = %d, rdev = %llx, size = %llu, "
841 "blksize = %llu, blocks = %llu, atime = %llu, mtime = %llu, "
842 "ctime = %llu, btime = %llu}\n",
843 llu(stx->stx_dev), llu(stx->stx_ino), stx->stx_mode,
844 llu(stx->stx_nlink), stx->stx_uid, stx->stx_gid,
845 llu(stx->stx_rdev), llu(stx->stx_size), llu(stx->stx_blksize),
846 llu(stx->stx_blocks), llu(stx->stx_atime.tv_sec),
847 llu(stx->stx_mtime.tv_sec), llu(stx->stx_ctime.tv_sec),
848 llu(stx->stx_btime.tv_sec));
849
850 if ((stx->stx_mask & SAMBA_STATX_ATTR_MASK) != SAMBA_STATX_ATTR_MASK) {
851 DBG_WARNING("%s: stx->stx_mask is incorrect (wanted %x, got %x)\n",
852 __func__, SAMBA_STATX_ATTR_MASK, stx->stx_mask);
853 }
854
855 dst->st_ex_dev = stx->stx_dev;
856 dst->st_ex_rdev = stx->stx_rdev;
857 dst->st_ex_ino = stx->stx_ino;
858 dst->st_ex_mode = stx->stx_mode;
859 dst->st_ex_uid = stx->stx_uid;
860 dst->st_ex_gid = stx->stx_gid;
861 dst->st_ex_size = stx->stx_size;
862 dst->st_ex_nlink = stx->stx_nlink;
863 dst->st_ex_atime = stx->stx_atime;
864 dst->st_ex_btime = stx->stx_btime;
865 dst->st_ex_ctime = stx->stx_ctime;
866 dst->st_ex_mtime = stx->stx_mtime;
867 dst->st_ex_blksize = stx->stx_blksize;
868 dst->st_ex_blocks = stx->stx_blocks;
869 }
870
871 static int cephwrap_stat(struct vfs_handle_struct *handle,
872 struct smb_filename *smb_fname)
873 {
874 int result = -1;
875 struct ceph_statx stx;
876
877 DBG_DEBUG("[CEPH] stat(%p, %s)\n", handle, smb_fname_str_dbg(smb_fname));
878
879 if (smb_fname->stream_name) {
880 errno = ENOENT;
881 return result;
882 }
883
884 result = ceph_statx(handle->data, smb_fname->base_name, &stx,
885 SAMBA_STATX_ATTR_MASK, 0);
886 DBG_DEBUG("[CEPH] statx(...) = %d\n", result);
887 if (result < 0) {
888 WRAP_RETURN(result);
889 }
890
891 init_stat_ex_from_ceph_statx(&smb_fname->st, &stx);
892 DBG_DEBUG("[CEPH] mode = 0x%x\n", smb_fname->st.st_ex_mode);
893 return result;
894 }
895
896 static int cephwrap_fstat(struct vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf)
897 {
898 int result = -1;
899 struct ceph_statx stx;
900 int fd = fsp_get_pathref_fd(fsp);
901
902 DBG_DEBUG("[CEPH] fstat(%p, %d)\n", handle, fd);
903 result = ceph_fstatx(handle->data, fd, &stx,
904 SAMBA_STATX_ATTR_MASK, 0);
905 DBG_DEBUG("[CEPH] fstat(...) = %d\n", result);
906 if (result < 0) {
907 WRAP_RETURN(result);
908 }
909
910 init_stat_ex_from_ceph_statx(sbuf, &stx);
911 DBG_DEBUG("[CEPH] mode = 0x%x\n", sbuf->st_ex_mode);
912 return result;
913 }
914
915 static int cephwrap_lstat(struct vfs_handle_struct *handle,
916 struct smb_filename *smb_fname)
917 {
918 int result = -1;
919 struct ceph_statx stx;
920
921 DBG_DEBUG("[CEPH] lstat(%p, %s)\n", handle, smb_fname_str_dbg(smb_fname));
922
923 if (smb_fname->stream_name) {
924 errno = ENOENT;
925 return result;
926 }
927
928 result = ceph_statx(handle->data, smb_fname->base_name, &stx,
929 SAMBA_STATX_ATTR_MASK, AT_SYMLINK_NOFOLLOW);
930 DBG_DEBUG("[CEPH] lstat(...) = %d\n", result);
931 if (result < 0) {
932 WRAP_RETURN(result);
933 }
934
935 init_stat_ex_from_ceph_statx(&smb_fname->st, &stx);
936 return result;
937 }
938
939 static int cephwrap_fntimes(struct vfs_handle_struct *handle,
940 files_struct *fsp,
941 struct smb_file_time *ft)
942 {
943 struct ceph_statx stx = { 0 };
944 int result;
945 int mask = 0;
946
947 if (!is_omit_timespec(&ft->atime)) {
948 stx.stx_atime = ft->atime;
949 mask |= CEPH_SETATTR_ATIME;
950 }
951 if (!is_omit_timespec(&ft->mtime)) {
952 stx.stx_mtime = ft->mtime;
953 mask |= CEPH_SETATTR_MTIME;
954 }
955 if (!is_omit_timespec(&ft->create_time)) {
956 stx.stx_btime = ft->create_time;
957 mask |= CEPH_SETATTR_BTIME;
958 }
959
960 if (!mask) {
961 return 0;
962 }
963
964 if (!fsp->fsp_flags.is_pathref) {
965 /*
966 * We can use an io_fd to set xattrs.
967 */
968 result = ceph_fsetattrx(handle->data,
969 fsp_get_io_fd(fsp),
970 &stx,
971 mask);
972 } else {
973 /*
974 * This is no longer a handle based call.
975 */
976 result = ceph_setattrx(handle->data,
977 fsp->fsp_name->base_name,
978 &stx,
979 mask,
980 0);
981 }
982
983 DBG_DEBUG("[CEPH] ntimes(%p, %s, {%ld, %ld, %ld, %ld}) = %d\n",
984 handle, fsp_str_dbg(fsp), ft->mtime.tv_sec, ft->atime.tv_sec,
985 ft->ctime.tv_sec, ft->create_time.tv_sec, result);
986
987 return result;
988 }
989
990 static int cephwrap_unlinkat(struct vfs_handle_struct *handle,
991 struct files_struct *dirfsp,
992 const struct smb_filename *smb_fname,
993 int flags)
994 {
995 struct smb_filename *full_fname = NULL;
996 int result = -1;
997
998 DBG_DEBUG("[CEPH] unlink(%p, %s)\n",
999 handle,
1000 smb_fname_str_dbg(smb_fname));
1001
1002 if (smb_fname->stream_name) {
1003 errno = ENOENT;
1004 return result;
1005 }
1006
1007 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1008 dirfsp,
1009 smb_fname);
1010 if (full_fname == NULL) {
1011 return -1;
1012 }
1013
1014 if (flags & AT_REMOVEDIR) {
1015 result = ceph_rmdir(handle->data, full_fname->base_name);
1016 } else {
1017 result = ceph_unlink(handle->data, full_fname->base_name);
1018 }
1019 TALLOC_FREE(full_fname);
1020 DBG_DEBUG("[CEPH] unlink(...) = %d\n", result);
1021 WRAP_RETURN(result);
1022 }
1023
1024 static int cephwrap_fchmod(struct vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
1025 {
1026 int result;
1027
1028 DBG_DEBUG("[CEPH] fchmod(%p, %p, %d)\n", handle, fsp, mode);
1029 if (!fsp->fsp_flags.is_pathref) {
1030 /*
1031 * We can use an io_fd to change permissions.
1032 */
1033 result = ceph_fchmod(handle->data, fsp_get_io_fd(fsp), mode);
1034 } else {
1035 /*
1036 * This is no longer a handle based call.
1037 */
1038 result = ceph_chmod(handle->data,
1039 fsp->fsp_name->base_name,
1040 mode);
1041 }
1042 DBG_DEBUG("[CEPH] fchmod(...) = %d\n", result);
1043 WRAP_RETURN(result);
1044 }
1045
1046 static int cephwrap_fchown(struct vfs_handle_struct *handle, files_struct *fsp, uid_t uid, gid_t gid)
1047 {
1048 int result;
1049
1050 DBG_DEBUG("[CEPH] fchown(%p, %p, %d, %d)\n", handle, fsp, uid, gid);
1051 if (!fsp->fsp_flags.is_pathref) {
1052 /*
1053 * We can use an io_fd to change ownership.
1054 */
1055 result = ceph_fchown(handle->data,
1056 fsp_get_io_fd(fsp),
1057 uid,
1058 gid);
1059 } else {
1060 /*
1061 * This is no longer a handle based call.
1062 */
1063 result = ceph_chown(handle->data,
1064 fsp->fsp_name->base_name,
1065 uid,
1066 gid);
1067 }
1068
1069 DBG_DEBUG("[CEPH] fchown(...) = %d\n", result);
1070 WRAP_RETURN(result);
1071 }
1072
1073 static int cephwrap_lchown(struct vfs_handle_struct *handle,
1074 const struct smb_filename *smb_fname,
1075 uid_t uid,
1076 gid_t gid)
1077 {
1078 int result;
1079 DBG_DEBUG("[CEPH] lchown(%p, %s, %d, %d)\n", handle, smb_fname->base_name, uid, gid);
1080 result = ceph_lchown(handle->data, smb_fname->base_name, uid, gid);
1081 DBG_DEBUG("[CEPH] lchown(...) = %d\n", result);
1082 WRAP_RETURN(result);
1083 }
1084
1085 static int cephwrap_chdir(struct vfs_handle_struct *handle,
1086 const struct smb_filename *smb_fname)
1087 {
1088 int result = -1;
1089 DBG_DEBUG("[CEPH] chdir(%p, %s)\n", handle, smb_fname->base_name);
1090 result = ceph_chdir(handle->data, smb_fname->base_name);
1091 DBG_DEBUG("[CEPH] chdir(...) = %d\n", result);
1092 WRAP_RETURN(result);
1093 }
1094
1095 static struct smb_filename *cephwrap_getwd(struct vfs_handle_struct *handle,
1096 TALLOC_CTX *ctx)
1097 {
1098 const char *cwd = ceph_getcwd(handle->data);
1099 DBG_DEBUG("[CEPH] getwd(%p) = %s\n", handle, cwd);
1100 return synthetic_smb_fname(ctx,
1101 cwd,
1102 NULL,
1103 NULL,
1104 0,
1105 0);
1106 }
1107
1108 static int strict_allocate_ftruncate(struct vfs_handle_struct *handle, files_struct *fsp, off_t len)
1109 {
1110 off_t space_to_write;
1111 int result;
1112 NTSTATUS status;
1113 SMB_STRUCT_STAT *pst;
1114
1115 status = vfs_stat_fsp(fsp);
1116 if (!NT_STATUS_IS_OK(status)) {
1117 return -1;
1118 }
1119 pst = &fsp->fsp_name->st;
1120
1121 #ifdef S_ISFIFO
1122 if (S_ISFIFO(pst->st_ex_mode))
1123 return 0;
1124 #endif
1125
1126 if (pst->st_ex_size == len)
1127 return 0;
1128
1129 /* Shrink - just ftruncate. */
1130 if (pst->st_ex_size > len) {
1131 result = ceph_ftruncate(handle->data, fsp_get_io_fd(fsp), len);
1132 WRAP_RETURN(result);
1133 }
1134
1135 space_to_write = len - pst->st_ex_size;
1136 result = ceph_fallocate(handle->data, fsp_get_io_fd(fsp), 0, pst->st_ex_size,
1137 space_to_write);
1138 WRAP_RETURN(result);
1139 }
1140
1141 static int cephwrap_ftruncate(struct vfs_handle_struct *handle, files_struct *fsp, off_t len)
1142 {
1143 int result = -1;
1144
1145 DBG_DEBUG("[CEPH] ftruncate(%p, %p, %llu\n", handle, fsp, llu(len));
1146
1147 if (lp_strict_allocate(SNUM(fsp->conn))) {
1148 return strict_allocate_ftruncate(handle, fsp, len);
1149 }
1150
1151 result = ceph_ftruncate(handle->data, fsp_get_io_fd(fsp), len);
1152 WRAP_RETURN(result);
1153 }
1154
1155 static int cephwrap_fallocate(struct vfs_handle_struct *handle,
1156 struct files_struct *fsp,
1157 uint32_t mode,
1158 off_t offset,
1159 off_t len)
1160 {
1161 int result;
1162
1163 DBG_DEBUG("[CEPH] fallocate(%p, %p, %u, %llu, %llu\n",
1164 handle, fsp, mode, llu(offset), llu(len));
1165 /* unsupported mode flags are rejected by libcephfs */
1166 result = ceph_fallocate(handle->data, fsp_get_io_fd(fsp), mode, offset, len);
1167 DBG_DEBUG("[CEPH] fallocate(...) = %d\n", result);
1168 WRAP_RETURN(result);
1169 }
1170
1171 static bool cephwrap_lock(struct vfs_handle_struct *handle, files_struct *fsp, int op, off_t offset, off_t count, int type)
1172 {
1173 DBG_DEBUG("[CEPH] lock\n");
1174 return true;
1175 }
1176
1177 static int cephwrap_filesystem_sharemode(struct vfs_handle_struct *handle,
1178 files_struct *fsp,
1179 uint32_t share_access,
1180 uint32_t access_mask)
1181 {
1182 DBG_ERR("[CEPH] filesystem sharemodes unsupported! Consider setting "
1183 "\"kernel share modes = no\"\n");
1184
1185 errno = ENOSYS;
1186 return -1;
1187 }
1188
1189 static int cephwrap_fcntl(vfs_handle_struct *handle,
1190 files_struct *fsp, int cmd, va_list cmd_arg)
1191 {
1192 /*
1193 * SMB_VFS_FCNTL() is currently only called by vfs_set_blocking() to
1194 * clear O_NONBLOCK, etc for LOCK_MAND and FIFOs. Ignore it.
1195 */
1196 if (cmd == F_GETFL) {
1197 return 0;
1198 } else if (cmd == F_SETFL) {
1199 va_list dup_cmd_arg;
1200 int opt;
1201
1202 va_copy(dup_cmd_arg, cmd_arg);
1203 opt = va_arg(dup_cmd_arg, int);
1204 va_end(dup_cmd_arg);
1205 if (opt == 0) {
1206 return 0;
1207 }
1208 DBG_ERR("unexpected fcntl SETFL(%d)\n", opt);
1209 goto err_out;
1210 }
1211 DBG_ERR("unexpected fcntl: %d\n", cmd);
1212 err_out:
1213 errno = EINVAL;
1214 return -1;
1215 }
1216
1217 static bool cephwrap_getlock(struct vfs_handle_struct *handle, files_struct *fsp, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid)
1218 {
1219 DBG_DEBUG("[CEPH] getlock returning false and errno=0\n");
1220
1221 errno = 0;
1222 return false;
1223 }
1224
1225 /*
1226 * We cannot let this fall through to the default, because the file might only
1227 * be accessible from libcephfs (which is a user-space client) but the fd might
1228 * be for some file the kernel knows about.
1229 */
1230 static int cephwrap_linux_setlease(struct vfs_handle_struct *handle, files_struct *fsp,
1231 int leasetype)
1232 {
1233 int result = -1;
1234
1235 DBG_DEBUG("[CEPH] linux_setlease\n");
1236 errno = ENOSYS;
1237 return result;
1238 }
1239
1240 static int cephwrap_symlinkat(struct vfs_handle_struct *handle,
1241 const struct smb_filename *link_target,
1242 struct files_struct *dirfsp,
1243 const struct smb_filename *new_smb_fname)
1244 {
1245 struct smb_filename *full_fname = NULL;
1246 int result = -1;
1247
1248 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1249 dirfsp,
1250 new_smb_fname);
1251 if (full_fname == NULL) {
1252 return -1;
1253 }
1254
1255 DBG_DEBUG("[CEPH] symlink(%p, %s, %s)\n", handle,
1256 link_target->base_name,
1257 full_fname->base_name);
1258
1259 result = ceph_symlink(handle->data,
1260 link_target->base_name,
1261 full_fname->base_name);
1262 TALLOC_FREE(full_fname);
1263 DBG_DEBUG("[CEPH] symlink(...) = %d\n", result);
1264 WRAP_RETURN(result);
1265 }
1266
1267 static int cephwrap_readlinkat(struct vfs_handle_struct *handle,
1268 const struct files_struct *dirfsp,
1269 const struct smb_filename *smb_fname,
1270 char *buf,
1271 size_t bufsiz)
1272 {
1273 struct smb_filename *full_fname = NULL;
1274 int result = -1;
1275
1276 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1277 dirfsp,
1278 smb_fname);
1279 if (full_fname == NULL) {
1280 return -1;
1281 }
1282
1283 DBG_DEBUG("[CEPH] readlink(%p, %s, %p, %llu)\n", handle,
1284 full_fname->base_name, buf, llu(bufsiz));
1285
1286 result = ceph_readlink(handle->data, full_fname->base_name, buf, bufsiz);
1287 TALLOC_FREE(full_fname);
1288 DBG_DEBUG("[CEPH] readlink(...) = %d\n", result);
1289 WRAP_RETURN(result);
1290 }
1291
1292 static int cephwrap_linkat(struct vfs_handle_struct *handle,
1293 files_struct *srcfsp,
1294 const struct smb_filename *old_smb_fname,
1295 files_struct *dstfsp,
1296 const struct smb_filename *new_smb_fname,
1297 int flags)
1298 {
1299 struct smb_filename *full_fname_old = NULL;
1300 struct smb_filename *full_fname_new = NULL;
1301 int result = -1;
1302
1303 full_fname_old = full_path_from_dirfsp_atname(talloc_tos(),
1304 srcfsp,
1305 old_smb_fname);
1306 if (full_fname_old == NULL) {
1307 return -1;
1308 }
1309 full_fname_new = full_path_from_dirfsp_atname(talloc_tos(),
1310 dstfsp,
1311 new_smb_fname);
1312 if (full_fname_new == NULL) {
1313 TALLOC_FREE(full_fname_old);
1314 return -1;
1315 }
1316
1317 DBG_DEBUG("[CEPH] link(%p, %s, %s)\n", handle,
1318 full_fname_old->base_name,
1319 full_fname_new->base_name);
1320
1321 result = ceph_link(handle->data,
1322 full_fname_old->base_name,
1323 full_fname_new->base_name);
1324 DBG_DEBUG("[CEPH] link(...) = %d\n", result);
1325 TALLOC_FREE(full_fname_old);
1326 TALLOC_FREE(full_fname_new);
1327 WRAP_RETURN(result);
1328 }
1329
1330 static int cephwrap_mknodat(struct vfs_handle_struct *handle,
1331 files_struct *dirfsp,
1332 const struct smb_filename *smb_fname,
1333 mode_t mode,
1334 SMB_DEV_T dev)
1335 {
1336 struct smb_filename *full_fname = NULL;
1337 int result = -1;
1338
1339 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1340 dirfsp,
1341 smb_fname);
1342 if (full_fname == NULL) {
1343 return -1;
1344 }
1345
1346 DBG_DEBUG("[CEPH] mknodat(%p, %s)\n", handle, full_fname->base_name);
1347 result = ceph_mknod(handle->data, full_fname->base_name, mode, dev);
1348 DBG_DEBUG("[CEPH] mknodat(...) = %d\n", result);
1349
1350 TALLOC_FREE(full_fname);
1351
1352 WRAP_RETURN(result);
1353 }
1354
1355 /*
1356 * This is a simple version of real-path ... a better version is needed to
1357 * ask libcephfs about symbolic links.
1358 */
1359 static struct smb_filename *cephwrap_realpath(struct vfs_handle_struct *handle,
1360 TALLOC_CTX *ctx,
1361 const struct smb_filename *smb_fname)
1362 {
1363 char *result = NULL;
1364 const char *path = smb_fname->base_name;
1365 size_t len = strlen(path);
1366 struct smb_filename *result_fname = NULL;
1367 int r = -1;
1368
1369 if (len && (path[0] == '/')) {
1370 r = asprintf(&result, "%s", path);
1371 } else if ((len >= 2) && (path[0] == '.') && (path[1] == '/')) {
1372 if (len == 2) {
1373 r = asprintf(&result, "%s",
1374 handle->conn->cwd_fsp->fsp_name->base_name);
1375 } else {
1376 r = asprintf(&result, "%s/%s",
1377 handle->conn->cwd_fsp->fsp_name->base_name, &path[2]);
1378 }
1379 } else {
1380 r = asprintf(&result, "%s/%s",
1381 handle->conn->cwd_fsp->fsp_name->base_name, path);
1382 }
1383
1384 if (r < 0) {
1385 return NULL;
1386 }
1387
1388 DBG_DEBUG("[CEPH] realpath(%p, %s) = %s\n", handle, path, result);
1389 result_fname = synthetic_smb_fname(ctx,
1390 result,
1391 NULL,
1392 NULL,
1393 0,
1394 0);
1395 SAFE_FREE(result);
1396 return result_fname;
1397 }
1398
1399
1400 static int cephwrap_fchflags(struct vfs_handle_struct *handle,
1401 struct files_struct *fsp,
1402 unsigned int flags)
1403 {
1404 errno = ENOSYS;
1405 return -1;
1406 }
1407
1408 static NTSTATUS cephwrap_get_real_filename_at(
1409 struct vfs_handle_struct *handle,
1410 struct files_struct *dirfsp,
1411 const char *name,
1412 TALLOC_CTX *mem_ctx,
1413 char **found_name)
1414 {
1415 /*
1416 * Don't fall back to get_real_filename so callers can differentiate
1417 * between a full directory scan and an actual case-insensitive stat.
1418 */
1419 return NT_STATUS_NOT_SUPPORTED;
1420 }
1421
1422 static const char *cephwrap_connectpath(
1423 struct vfs_handle_struct *handle,
1424 const struct files_struct *dirfsp,
1425 const struct smb_filename *smb_fname)
1426 {
1427 return handle->conn->connectpath;
1428 }
1429
1430 /****************************************************************
1431 Extended attribute operations.
1432 *****************************************************************/
1433
1434 static ssize_t cephwrap_fgetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, void *value, size_t size)
1435 {
1436 int ret;
1437 DBG_DEBUG("[CEPH] fgetxattr(%p, %p, %s, %p, %llu)\n", handle, fsp, name, value, llu(size));
1438 ret = ceph_fgetxattr(handle->data, fsp_get_io_fd(fsp), name, value, size);
1439 DBG_DEBUG("[CEPH] fgetxattr(...) = %d\n", ret);
1440 if (ret < 0) {
1441 WRAP_RETURN(ret);
1442 }
1443 return (ssize_t)ret;
1444 }
1445
1446 static ssize_t cephwrap_flistxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, char *list, size_t size)
1447 {
1448 int ret;
1449 DBG_DEBUG("[CEPH] flistxattr(%p, %p, %p, %llu)\n",
1450 handle, fsp, list, llu(size));
1451 if (!fsp->fsp_flags.is_pathref) {
1452 /*
1453 * We can use an io_fd to list xattrs.
1454 */
1455 ret = ceph_flistxattr(handle->data,
1456 fsp_get_io_fd(fsp),
1457 list,
1458 size);
1459 } else {
1460 /*
1461 * This is no longer a handle based call.
1462 */
1463 ret = ceph_listxattr(handle->data,
1464 fsp->fsp_name->base_name,
1465 list,
1466 size);
1467 }
1468 DBG_DEBUG("[CEPH] flistxattr(...) = %d\n", ret);
1469 if (ret < 0) {
1470 WRAP_RETURN(ret);
1471 }
1472 return (ssize_t)ret;
1473 }
1474
1475 static int cephwrap_fremovexattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name)
1476 {
1477 int ret;
1478 DBG_DEBUG("[CEPH] fremovexattr(%p, %p, %s)\n", handle, fsp, name);
1479 if (!fsp->fsp_flags.is_pathref) {
1480 /*
1481 * We can use an io_fd to remove xattrs.
1482 */
1483 ret = ceph_fremovexattr(handle->data, fsp_get_io_fd(fsp), name);
1484 } else {
1485 /*
1486 * This is no longer a handle based call.
1487 */
1488 ret = ceph_removexattr(handle->data,
1489 fsp->fsp_name->base_name,
1490 name);
1491 }
1492 DBG_DEBUG("[CEPH] fremovexattr(...) = %d\n", ret);
1493 WRAP_RETURN(ret);
1494 }
1495
1496 static int cephwrap_fsetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, const void *value, size_t size, int flags)
1497 {
1498 int ret;
1499 DBG_DEBUG("[CEPH] fsetxattr(%p, %p, %s, %p, %llu, %d)\n", handle, fsp, name, value, llu(size), flags);
1500 if (!fsp->fsp_flags.is_pathref) {
1501 /*
1502 * We can use an io_fd to set xattrs.
1503 */
1504 ret = ceph_fsetxattr(handle->data,
1505 fsp_get_io_fd(fsp),
1506 name,
1507 value,
1508 size,
1509 flags);
1510 } else {
1511 /*
1512 * This is no longer a handle based call.
1513 */
1514 ret = ceph_setxattr(handle->data,
1515 fsp->fsp_name->base_name,
1516 name,
1517 value,
1518 size,
1519 flags);
1520 }
1521 DBG_DEBUG("[CEPH] fsetxattr(...) = %d\n", ret);
1522 WRAP_RETURN(ret);
1523 }
1524
1525 static bool cephwrap_aio_force(struct vfs_handle_struct *handle, struct files_struct *fsp)
1526 {
1527
1528 /*
1529 * We do not support AIO yet.
1530 */
1531
1532 DBG_DEBUG("[CEPH] cephwrap_aio_force(%p, %p) = false (errno = ENOTSUP)\n", handle, fsp);
1533 errno = ENOTSUP;
1534 return false;
1535 }
1536
1537 static NTSTATUS cephwrap_create_dfs_pathat(struct vfs_handle_struct *handle,
1538 struct files_struct *dirfsp,
1539 const struct smb_filename *smb_fname,
1540 const struct referral *reflist,
1541 size_t referral_count)
1542 {
1543 TALLOC_CTX *frame = talloc_stackframe();
1544 NTSTATUS status = NT_STATUS_NO_MEMORY;
1545 int ret;
1546 char *msdfs_link = NULL;
1547 struct smb_filename *full_fname = NULL;
1548
1549 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1550 dirfsp,
1551 smb_fname);
1552 if (full_fname == NULL) {
1553 goto out;
1554 }
1555
1556 /* Form the msdfs_link contents */
1557 msdfs_link = msdfs_link_string(frame,
1558 reflist,
1559 referral_count);
1560 if (msdfs_link == NULL) {
1561 goto out;
1562 }
1563
1564 ret = ceph_symlink(handle->data,
1565 msdfs_link,
1566 full_fname->base_name);
1567 if (ret == 0) {
1568 status = NT_STATUS_OK;
1569 } else {
1570 status = map_nt_error_from_unix(-ret);
1571 }
1572
1573 out:
1574
1575 DBG_DEBUG("[CEPH] create_dfs_pathat(%s) = %s\n",
1576 full_fname != NULL ? full_fname->base_name : "",
1577 nt_errstr(status));
1578
1579 TALLOC_FREE(frame);
1580 return status;
1581 }
1582
1583 /*
1584 * Read and return the contents of a DFS redirect given a
1585 * pathname. A caller can pass in NULL for ppreflist and
1586 * preferral_count but still determine if this was a
1587 * DFS redirect point by getting NT_STATUS_OK back
1588 * without incurring the overhead of reading and parsing
1589 * the referral contents.
1590 */
1591
1592 static NTSTATUS cephwrap_read_dfs_pathat(struct vfs_handle_struct *handle,
1593 TALLOC_CTX *mem_ctx,
1594 struct files_struct *dirfsp,
1595 struct smb_filename *smb_fname,
1596 struct referral **ppreflist,
1597 size_t *preferral_count)
1598 {
1599 NTSTATUS status = NT_STATUS_NO_MEMORY;
1600 size_t bufsize;
1601 char *link_target = NULL;
1602 int referral_len;
1603 bool ok;
1604 #if defined(HAVE_BROKEN_READLINK)
1605 char link_target_buf[PATH_MAX];
1606 #else
1607 char link_target_buf[7];
1608 #endif
1609 struct ceph_statx stx;
1610 struct smb_filename *full_fname = NULL;
1611 int ret;
1612
1613 if (is_named_stream(smb_fname)) {
1614 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
1615 goto err;
1616 }
1617
1618 if (ppreflist == NULL && preferral_count == NULL) {
1619 /*
1620 * We're only checking if this is a DFS
1621 * redirect. We don't need to return data.
1622 */
1623 bufsize = sizeof(link_target_buf);
1624 link_target = link_target_buf;
1625 } else {
1626 bufsize = PATH_MAX;
1627 link_target = talloc_array(mem_ctx, char, bufsize);
1628 if (!link_target) {
1629 goto err;
1630 }
1631 }
1632
1633 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1634 dirfsp,
1635 smb_fname);
1636 if (full_fname == NULL) {
1637 status = NT_STATUS_NO_MEMORY;
1638 goto err;
1639 }
1640
1641 ret = ceph_statx(handle->data,
1642 full_fname->base_name,
1643 &stx,
1644 SAMBA_STATX_ATTR_MASK,
1645 AT_SYMLINK_NOFOLLOW);
1646 if (ret < 0) {
1647 status = map_nt_error_from_unix(-ret);
1648 goto err;
1649 }
1650
1651 referral_len = ceph_readlink(handle->data,
1652 full_fname->base_name,
1653 link_target,
1654 bufsize - 1);
1655 if (referral_len < 0) {
1656 /* ceph errors are -errno. */
1657 if (-referral_len == EINVAL) {
1658 DBG_INFO("%s is not a link.\n",
1659 full_fname->base_name);
1660 status = NT_STATUS_OBJECT_TYPE_MISMATCH;
1661 } else {
1662 status = map_nt_error_from_unix(-referral_len);
1663 DBG_ERR("Error reading "
1664 "msdfs link %s: %s\n",
1665 full_fname->base_name,
1666 strerror(errno));
1667 }
1668 goto err;
1669 }
1670 link_target[referral_len] = '\0';
1671
1672 DBG_INFO("%s -> %s\n",
1673 full_fname->base_name,
1674 link_target);
1675
1676 if (!strnequal(link_target, "msdfs:", 6)) {
1677 status = NT_STATUS_OBJECT_TYPE_MISMATCH;
1678 goto err;
1679 }
1680
1681 if (ppreflist == NULL && preferral_count == NULL) {
1682 /* Early return for checking if this is a DFS link. */
1683 TALLOC_FREE(full_fname);
1684 init_stat_ex_from_ceph_statx(&smb_fname->st, &stx);
1685 return NT_STATUS_OK;
1686 }
1687
1688 ok = parse_msdfs_symlink(mem_ctx,
1689 lp_msdfs_shuffle_referrals(SNUM(handle->conn)),
1690 link_target,
1691 ppreflist,
1692 preferral_count);
1693
1694 if (ok) {
1695 init_stat_ex_from_ceph_statx(&smb_fname->st, &stx);
1696 status = NT_STATUS_OK;
1697 } else {
1698 status = NT_STATUS_NO_MEMORY;
1699 }
1700
1701 err:
1702
1703 if (link_target != link_target_buf) {
1704 TALLOC_FREE(link_target);
1705 }
1706 TALLOC_FREE(full_fname);
1707 return status;
1708 }
1709
1710 static struct vfs_fn_pointers ceph_fns = {
1711 /* Disk operations */
1712
1713 .connect_fn = cephwrap_connect,
1714 .disconnect_fn = cephwrap_disconnect,
1715 .disk_free_fn = cephwrap_disk_free,
1716 .get_quota_fn = cephwrap_get_quota,
1717 .set_quota_fn = cephwrap_set_quota,
1718 .statvfs_fn = cephwrap_statvfs,
1719 .fs_capabilities_fn = cephwrap_fs_capabilities,
1720
1721 /* Directory operations */
1722
1723 .fdopendir_fn = cephwrap_fdopendir,
1724 .readdir_fn = cephwrap_readdir,
1725 .rewind_dir_fn = cephwrap_rewinddir,
1726 .mkdirat_fn = cephwrap_mkdirat,
1727 .closedir_fn = cephwrap_closedir,
1728
1729 /* File operations */
1730
1731 .create_dfs_pathat_fn = cephwrap_create_dfs_pathat,
1732 .read_dfs_pathat_fn = cephwrap_read_dfs_pathat,
1733 .openat_fn = cephwrap_openat,
1734 .close_fn = cephwrap_close,
1735 .pread_fn = cephwrap_pread,
1736 .pread_send_fn = cephwrap_pread_send,
1737 .pread_recv_fn = cephwrap_pread_recv,
1738 .pwrite_fn = cephwrap_pwrite,
1739 .pwrite_send_fn = cephwrap_pwrite_send,
1740 .pwrite_recv_fn = cephwrap_pwrite_recv,
1741 .lseek_fn = cephwrap_lseek,
1742 .sendfile_fn = cephwrap_sendfile,
1743 .recvfile_fn = cephwrap_recvfile,
1744 .renameat_fn = cephwrap_renameat,
1745 .fsync_send_fn = cephwrap_fsync_send,
1746 .fsync_recv_fn = cephwrap_fsync_recv,
1747 .stat_fn = cephwrap_stat,
1748 .fstat_fn = cephwrap_fstat,
1749 .lstat_fn = cephwrap_lstat,
1750 .unlinkat_fn = cephwrap_unlinkat,
1751 .fchmod_fn = cephwrap_fchmod,
1752 .fchown_fn = cephwrap_fchown,
1753 .lchown_fn = cephwrap_lchown,
1754 .chdir_fn = cephwrap_chdir,
1755 .getwd_fn = cephwrap_getwd,
1756 .fntimes_fn = cephwrap_fntimes,
1757 .ftruncate_fn = cephwrap_ftruncate,
1758 .fallocate_fn = cephwrap_fallocate,
1759 .lock_fn = cephwrap_lock,
1760 .filesystem_sharemode_fn = cephwrap_filesystem_sharemode,
1761 .fcntl_fn = cephwrap_fcntl,
1762 .linux_setlease_fn = cephwrap_linux_setlease,
1763 .getlock_fn = cephwrap_getlock,
1764 .symlinkat_fn = cephwrap_symlinkat,
1765 .readlinkat_fn = cephwrap_readlinkat,
1766 .linkat_fn = cephwrap_linkat,
1767 .mknodat_fn = cephwrap_mknodat,
1768 .realpath_fn = cephwrap_realpath,
1769 .fchflags_fn = cephwrap_fchflags,
1770 .get_real_filename_at_fn = cephwrap_get_real_filename_at,
1771 .connectpath_fn = cephwrap_connectpath,
1772
1773 /* EA operations. */
1774 .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
1775 .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
1776 .fgetxattr_fn = cephwrap_fgetxattr,
1777 .flistxattr_fn = cephwrap_flistxattr,
1778 .fremovexattr_fn = cephwrap_fremovexattr,
1779 .fsetxattr_fn = cephwrap_fsetxattr,
1780
1781 /* Posix ACL Operations */
1782 .sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
1783 .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
1784 .sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
1785 .sys_acl_delete_def_fd_fn = posixacl_xattr_acl_delete_def_fd,
1786
1787 /* aio operations */
1788 .aio_force_fn = cephwrap_aio_force,
1789 };
1790
1791 static_decl_vfs;
1792 NTSTATUS vfs_ceph_init(TALLOC_CTX *ctx)
1793 {
1794 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
1795 "ceph", &ceph_fns);
1796 }
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