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vfs_glusterfs: Implement AIO support
[Samba.git] / source3 / modules / vfs_glusterfs.c
blob68aea40c8782be8a747372f3eb5459de093f2f3d
1 /*
2 Unix SMB/CIFS implementation.
3
4 Wrap GlusterFS GFAPI calls in vfs functions.
5
6 Copyright (c) 2013 Anand Avati <avati@redhat.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 /**
23 * @file vfs_glusterfs.c
24 * @author Anand Avati <avati@redhat.com>
25 * @date May 2013
26 * @brief Samba VFS module for glusterfs
27 *
28 * @todo
29 * - sendfile/recvfile support
30 *
31 * A Samba VFS module for GlusterFS, based on Gluster's libgfapi.
32 * This is a "bottom" vfs module (not something to be stacked on top of
33 * another module), and translates (most) calls to the closest actions
34 * available in libgfapi.
35 *
36 */
37
38 #include "includes.h"
39 #include "smbd/smbd.h"
40 #include <stdio.h>
41 #include "api/glfs.h"
42 #include "lib/util/dlinklist.h"
43 #include "lib/util/tevent_unix.h"
44 #ifdef HAVE_SYS_EVENTFD_H
45 #include <sys/eventfd.h>
46 #endif
47 #include <pthread.h>
48 #include "smbd/globals.h"
49
50 #define DEFAULT_VOLFILE_SERVER "localhost"
51
52 #ifdef HAVE_EVENTFD
53 static pthread_mutex_t lock_req_list = PTHREAD_MUTEX_INITIALIZER;
54 static int event_fd = -1;
55 static struct tevent_fd *aio_read_event = NULL;
56 static struct tevent_req **req_producer_list = NULL;
57 static struct tevent_req **req_consumer_list = NULL;
58 static uint64_t req_counter = 0;
59 #endif
60
61 /**
62 * Helper to convert struct stat to struct stat_ex.
63 */
64 static void smb_stat_ex_from_stat(struct stat_ex *dst, const struct stat *src)
65 {
66 ZERO_STRUCTP(dst);
67
68 dst->st_ex_dev = src->st_dev;
69 dst->st_ex_ino = src->st_ino;
70 dst->st_ex_mode = src->st_mode;
71 dst->st_ex_nlink = src->st_nlink;
72 dst->st_ex_uid = src->st_uid;
73 dst->st_ex_gid = src->st_gid;
74 dst->st_ex_rdev = src->st_rdev;
75 dst->st_ex_size = src->st_size;
76 dst->st_ex_atime.tv_sec = src->st_atime;
77 dst->st_ex_mtime.tv_sec = src->st_mtime;
78 dst->st_ex_ctime.tv_sec = src->st_ctime;
79 dst->st_ex_btime.tv_sec = src->st_mtime;
80 dst->st_ex_blksize = src->st_blksize;
81 dst->st_ex_blocks = src->st_blocks;
82 #ifdef STAT_HAVE_NSEC
83 dst->st_ex_atime.tv_nsec = src->st_atime_nsec;
84 dst->st_ex_mtime.tv_nsec = src->st_mtime_nsec;
85 dst->st_ex_ctime.tv_nsec = src->st_ctime_nsec;
86 dst->st_ex_btime.tv_nsec = src->st_mtime_nsec;
87 #endif
88 }
89
90 /* pre-opened glfs_t */
91
92 static struct glfs_preopened {
93 char *volume;
94 char *connectpath;
95 glfs_t *fs;
96 int ref;
97 struct glfs_preopened *next, *prev;
98 } *glfs_preopened;
99
100
101 static int glfs_set_preopened(const char *volume, const char *connectpath, glfs_t *fs)
102 {
103 struct glfs_preopened *entry = NULL;
104
105 entry = talloc_zero(NULL, struct glfs_preopened);
106 if (!entry) {
107 errno = ENOMEM;
108 return -1;
109 }
110
111 entry->volume = talloc_strdup(entry, volume);
112 if (!entry->volume) {
113 talloc_free(entry);
114 errno = ENOMEM;
115 return -1;
116 }
117
118 entry->connectpath = talloc_strdup(entry, connectpath);
119 if (entry->connectpath == NULL) {
120 talloc_free(entry);
121 errno = ENOMEM;
122 return -1;
123 }
124
125 entry->fs = fs;
126 entry->ref = 1;
127
128 DLIST_ADD(glfs_preopened, entry);
129
130 return 0;
131 }
132
133 static glfs_t *glfs_find_preopened(const char *volume, const char *connectpath)
134 {
135 struct glfs_preopened *entry = NULL;
136
137 for (entry = glfs_preopened; entry; entry = entry->next) {
138 if (strcmp(entry->volume, volume) == 0 &&
139 strcmp(entry->connectpath, connectpath) == 0)
140 {
141 entry->ref++;
142 return entry->fs;
143 }
144 }
145
146 return NULL;
147 }
148
149 static void glfs_clear_preopened(glfs_t *fs)
150 {
151 struct glfs_preopened *entry = NULL;
152
153 for (entry = glfs_preopened; entry; entry = entry->next) {
154 if (entry->fs == fs) {
155 if (--entry->ref)
156 return;
157
158 DLIST_REMOVE(glfs_preopened, entry);
159
160 glfs_fini(entry->fs);
161 talloc_free(entry);
162 }
163 }
164 }
165
166 /* Disk Operations */
167
168 static int vfs_gluster_connect(struct vfs_handle_struct *handle,
169 const char *service,
170 const char *user)
171 {
172 const char *volfile_server;
173 const char *volume;
174 char *logfile;
175 int loglevel;
176 glfs_t *fs = NULL;
177 TALLOC_CTX *tmp_ctx;
178 int ret = 0;
179
180 tmp_ctx = talloc_new(NULL);
181 if (tmp_ctx == NULL) {
182 ret = -1;
183 goto done;
184 }
185 logfile = lp_parm_talloc_string(tmp_ctx, SNUM(handle->conn), "glusterfs",
186 "logfile", NULL);
187
188 loglevel = lp_parm_int(SNUM(handle->conn), "glusterfs", "loglevel", -1);
189
190 volfile_server = lp_parm_const_string(SNUM(handle->conn), "glusterfs",
191 "volfile_server", NULL);
192 if (volfile_server == NULL) {
193 volfile_server = DEFAULT_VOLFILE_SERVER;
194 }
195
196 volume = lp_parm_const_string(SNUM(handle->conn), "glusterfs", "volume",
197 NULL);
198 if (volume == NULL) {
199 volume = service;
200 }
201
202 fs = glfs_find_preopened(volume, handle->conn->connectpath);
203 if (fs) {
204 goto done;
205 }
206
207 fs = glfs_new(volume);
208 if (fs == NULL) {
209 ret = -1;
210 goto done;
211 }
212
213 ret = glfs_set_volfile_server(fs, "tcp", volfile_server, 0);
214 if (ret < 0) {
215 DEBUG(0, ("Failed to set volfile_server %s\n", volfile_server));
216 goto done;
217 }
218
219 ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-posix-acl",
220 "true");
221 if (ret < 0) {
222 DEBUG(0, ("%s: Failed to set xlator options\n", volume));
223 goto done;
224 }
225
226
227 ret = glfs_set_xlator_option(fs, "*-snapview-client",
228 "snapdir-entry-path",
229 handle->conn->connectpath);
230 if (ret < 0) {
231 DEBUG(0, ("%s: Failed to set xlator option:"
232 " snapdir-entry-path\n", volume));
233 glfs_fini(fs);
234 return -1;
235 }
236
237 ret = glfs_set_logging(fs, logfile, loglevel);
238 if (ret < 0) {
239 DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
240 volume, logfile, loglevel));
241 goto done;
242 }
243
244 ret = glfs_init(fs);
245 if (ret < 0) {
246 DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
247 volume, strerror(errno)));
248 goto done;
249 }
250
251 ret = glfs_set_preopened(volume, handle->conn->connectpath, fs);
252 if (ret < 0) {
253 DEBUG(0, ("%s: Failed to register volume (%s)\n",
254 volume, strerror(errno)));
255 goto done;
256 }
257 done:
258 talloc_free(tmp_ctx);
259 if (ret < 0) {
260 if (fs)
261 glfs_fini(fs);
262 return -1;
263 } else {
264 DEBUG(0, ("%s: Initialized volume from server %s\n",
265 volume, volfile_server));
266 handle->data = fs;
267 return 0;
268 }
269 }
270
271 static void vfs_gluster_disconnect(struct vfs_handle_struct *handle)
272 {
273 glfs_t *fs = NULL;
274
275 fs = handle->data;
276
277 glfs_clear_preopened(fs);
278 }
279
280 static uint64_t vfs_gluster_disk_free(struct vfs_handle_struct *handle,
281 const char *path, bool small_query,
282 uint64_t *bsize_p, uint64_t *dfree_p,
283 uint64_t *dsize_p)
284 {
285 struct statvfs statvfs = { 0, };
286 int ret;
287
288 ret = glfs_statvfs(handle->data, path, &statvfs);
289 if (ret < 0) {
290 return -1;
291 }
292
293 if (bsize_p != NULL) {
294 *bsize_p = (uint64_t)statvfs.f_bsize; /* Block size */
295 }
296 if (dfree_p != NULL) {
297 *dfree_p = (uint64_t)statvfs.f_bavail; /* Available Block units */
298 }
299 if (dsize_p != NULL) {
300 *dsize_p = (uint64_t)statvfs.f_blocks; /* Total Block units */
301 }
302
303 return (uint64_t)statvfs.f_bavail;
304 }
305
306 static int vfs_gluster_get_quota(struct vfs_handle_struct *handle,
307 enum SMB_QUOTA_TYPE qtype, unid_t id,
308 SMB_DISK_QUOTA *qt)
309 {
310 errno = ENOSYS;
311 return -1;
312 }
313
314 static int
315 vfs_gluster_set_quota(struct vfs_handle_struct *handle,
316 enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
317 {
318 errno = ENOSYS;
319 return -1;
320 }
321
322 static int vfs_gluster_statvfs(struct vfs_handle_struct *handle,
323 const char *path,
324 struct vfs_statvfs_struct *vfs_statvfs)
325 {
326 struct statvfs statvfs = { 0, };
327 int ret;
328
329 ret = glfs_statvfs(handle->data, path, &statvfs);
330 if (ret < 0) {
331 DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
332 path, strerror(errno)));
333 return -1;
334 }
335
336 ZERO_STRUCTP(vfs_statvfs);
337
338 vfs_statvfs->OptimalTransferSize = statvfs.f_frsize;
339 vfs_statvfs->BlockSize = statvfs.f_bsize;
340 vfs_statvfs->TotalBlocks = statvfs.f_blocks;
341 vfs_statvfs->BlocksAvail = statvfs.f_bfree;
342 vfs_statvfs->UserBlocksAvail = statvfs.f_bavail;
343 vfs_statvfs->TotalFileNodes = statvfs.f_files;
344 vfs_statvfs->FreeFileNodes = statvfs.f_ffree;
345 vfs_statvfs->FsIdentifier = statvfs.f_fsid;
346 vfs_statvfs->FsCapabilities =
347 FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
348
349 return ret;
350 }
351
352 static uint32_t vfs_gluster_fs_capabilities(struct vfs_handle_struct *handle,
353 enum timestamp_set_resolution *p_ts_res)
354 {
355 uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
356
357 #ifdef STAT_HAVE_NSEC
358 *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
359 #endif
360
361 return caps;
362 }
363
364 static DIR *vfs_gluster_opendir(struct vfs_handle_struct *handle,
365 const char *path, const char *mask,
366 uint32 attributes)
367 {
368 glfs_fd_t *fd;
369
370 fd = glfs_opendir(handle->data, path);
371 if (fd == NULL) {
372 DEBUG(0, ("glfs_opendir(%s) failed: %s\n",
373 path, strerror(errno)));
374 }
375
376 return (DIR *) fd;
377 }
378
379 static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
380 files_struct *fsp, const char *mask,
381 uint32 attributes)
382 {
383 return (DIR *) *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
384 }
385
386 static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
387 {
388 return glfs_closedir((void *)dirp);
389 }
390
391 static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
392 DIR *dirp, SMB_STRUCT_STAT *sbuf)
393 {
394 static char direntbuf[512];
395 int ret;
396 struct stat stat;
397 struct dirent *dirent = 0;
398
399 if (sbuf != NULL) {
400 ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
401 &dirent);
402 } else {
403 ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
404 }
405
406 if ((ret < 0) || (dirent == NULL)) {
407 return NULL;
408 }
409
410 if (sbuf != NULL) {
411 smb_stat_ex_from_stat(sbuf, &stat);
412 }
413
414 return dirent;
415 }
416
417 static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
418 {
419 return glfs_telldir((void *)dirp);
420 }
421
422 static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
423 long offset)
424 {
425 glfs_seekdir((void *)dirp, offset);
426 }
427
428 static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
429 {
430 glfs_seekdir((void *)dirp, 0);
431 }
432
433 static void vfs_gluster_init_search_op(struct vfs_handle_struct *handle,
434 DIR *dirp)
435 {
436 return;
437 }
438
439 static int vfs_gluster_mkdir(struct vfs_handle_struct *handle, const char *path,
440 mode_t mode)
441 {
442 return glfs_mkdir(handle->data, path, mode);
443 }
444
445 static int vfs_gluster_rmdir(struct vfs_handle_struct *handle, const char *path)
446 {
447 return glfs_rmdir(handle->data, path);
448 }
449
450 static int vfs_gluster_open(struct vfs_handle_struct *handle,
451 struct smb_filename *smb_fname, files_struct *fsp,
452 int flags, mode_t mode)
453 {
454 glfs_fd_t *glfd;
455 glfs_fd_t **p_tmp;
456
457 if (flags & O_DIRECTORY) {
458 glfd = glfs_opendir(handle->data, smb_fname->base_name);
459 } else if (flags & O_CREAT) {
460 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
461 mode);
462 } else {
463 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
464 }
465
466 if (glfd == NULL) {
467 return -1;
468 }
469 p_tmp = (glfs_fd_t **)VFS_ADD_FSP_EXTENSION(handle, fsp,
470 glfs_fd_t *, NULL);
471 *p_tmp = glfd;
472 /* An arbitrary value for error reporting, so you know its us. */
473 return 13371337;
474 }
475
476 static int vfs_gluster_close(struct vfs_handle_struct *handle,
477 files_struct *fsp)
478 {
479 glfs_fd_t *glfd;
480 glfd = *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
481 VFS_REMOVE_FSP_EXTENSION(handle, fsp);
482 return glfs_close(glfd);
483 }
484
485 static ssize_t vfs_gluster_read(struct vfs_handle_struct *handle,
486 files_struct *fsp, void *data, size_t n)
487 {
488 return glfs_read(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, 0);
489 }
490
491 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
492 files_struct *fsp, void *data, size_t n,
493 off_t offset)
494 {
495 return glfs_pread(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
496 }
497
498 struct glusterfs_aio_state {
499 ssize_t ret;
500 int err;
501 };
502
503 /*
504 * This function is the callback that will be called on glusterfs
505 * threads once the async IO submitted is complete. To notify
506 * Samba of the completion we use eventfd mechanism.
507 */
508 static void aio_glusterfs_done(glfs_fd_t *fd, ssize_t ret, void *data)
509 {
510 #if HAVE_EVENTFD
511 struct tevent_req *req = NULL;
512 struct glusterfs_aio_state *state = NULL;
513 int i, sts = 0;
514 uint64_t u = 1;
515
516 req = talloc_get_type_abort(data, struct tevent_req);
517 state = tevent_req_data(req, struct glusterfs_aio_state);
518
519 if (ret < 0) {
520 state->ret = -1;
521 state->err = errno;
522 } else {
523 state->ret = ret;
524 state->err = 0;
525 }
526
527 /*
528 * Store the reqs that needs to be completed by calling
529 * tevent_req_done(). tevent_req_done() cannot be called
530 * here, as it is not designed to be executed in the
531 * multithread environment, tevent_req_done() should be
532 * executed from the smbd main thread.
533 */
534 pthread_mutex_lock (&lock_req_list);
535 {
536 for (i = 0 ; i < aio_pending_size ; i++) {
537 if(!req_producer_list[i]) {
538 req_producer_list[i] = req;
539 req_counter = req_counter + 1;
540 break;
541 }
542 }
543 }
544 pthread_mutex_unlock (&lock_req_list);
545
546 /*
547 * For a bunch of fops notify only once
548 */
549 if (req_counter == 1) {
550 sts = write (event_fd, &u, sizeof(uint64_t));
551 if (sts < 0 && errno == EAGAIN)
552 DEBUG(0,("\nWRITE: reached max value"));
553 }
554 return;
555 #endif
556 }
557
558 #ifdef HAVE_EVENTFD
559 static void aio_tevent_fd_done(struct tevent_context *event_ctx,
560 struct tevent_fd *fde,
561 uint16 flags, void *data)
562 {
563 struct tevent_req *req = NULL;
564 struct tevent_req **temp = NULL;
565 int i = 0, sts = 0;
566 uint64_t u = 0;
567
568 sts = read (event_fd, &u, sizeof(uint64_t));
569 if (sts < 0 && errno == EAGAIN)
570 DEBUG(0,("\nREAD: eventfd read failed (%s)",strerror(errno)));
571
572 pthread_mutex_lock (&lock_req_list);
573 {
574 temp = req_producer_list;
575 req_producer_list = req_consumer_list;
576 req_consumer_list = temp;
577 req_counter = 0;
578 }
579 pthread_mutex_unlock (&lock_req_list);
580
581 for (i = 0 ; i < aio_pending_size ; i++) {
582 req = req_consumer_list[i];
583 if (req) {
584 tevent_req_done(req);
585 req_consumer_list[i] = 0;
586 }
587 }
588 return;
589 }
590 #endif
591
592 static bool init_gluster_aio(struct vfs_handle_struct *handle)
593 {
594 #ifdef HAVE_EVENTFD
595 if (event_fd != -1) {
596 /*
597 * Already initialized.
598 */
599 return true;
600 }
601
602 event_fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
603 if (event_fd == -1) {
604 goto fail;
605 }
606
607 aio_read_event = tevent_add_fd(handle->conn->sconn->ev_ctx,
608 NULL,
609 event_fd,
610 TEVENT_FD_READ,
611 aio_tevent_fd_done,
612 NULL);
613 if (aio_read_event == NULL) {
614 goto fail;
615 }
616
617 req_producer_list = talloc_zero_array(NULL, struct tevent_req *,
618 aio_pending_size);
619 req_consumer_list = talloc_zero_array(NULL, struct tevent_req *,
620 aio_pending_size);
621
622 return true;
623 fail:
624 TALLOC_FREE(aio_read_event);
625 if (event_fd != -1) {
626 close(event_fd);
627 event_fd = -1;
628 }
629 #endif
630 return false;
631 }
632
633 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
634 *handle, TALLOC_CTX *mem_ctx,
635 struct tevent_context *ev,
636 files_struct *fsp, void *data,
637 size_t n, off_t offset)
638 {
639 struct tevent_req *req = NULL;
640 struct glusterfs_aio_state *state = NULL;
641 int ret = 0;
642
643 #ifndef HAVE_EVENTFD
644 errno = ENOTSUP;
645 return NULL;
646 #endif
647
648 req = tevent_req_create(mem_ctx, &state, struct glusterfs_aio_state);
649 if (req == NULL) {
650 return NULL;
651 }
652
653 if (!init_gluster_aio(handle)) {
654 tevent_req_error(req, EIO);
655 return tevent_req_post(req, ev);
656 }
657 ret = glfs_pread_async(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle,
658 fsp), data, n, offset, 0, aio_glusterfs_done,
659 req);
660 if (ret < 0) {
661 tevent_req_error(req, -ret);
662 return tevent_req_post(req, ev);
663 }
664
665 return req;
666 }
667
668 static ssize_t vfs_gluster_write(struct vfs_handle_struct *handle,
669 files_struct *fsp, const void *data, size_t n)
670 {
671 return glfs_write(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, 0);
672 }
673
674 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
675 files_struct *fsp, const void *data,
676 size_t n, off_t offset)
677 {
678 return glfs_pwrite(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
679 }
680
681 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
682 *handle, TALLOC_CTX *mem_ctx,
683 struct tevent_context *ev,
684 files_struct *fsp,
685 const void *data, size_t n,
686 off_t offset)
687 {
688 struct tevent_req *req = NULL;
689 struct glusterfs_aio_state *state = NULL;
690 int ret = 0;
691
692 #ifndef HAVE_EVENTFD
693 errno = ENOTSUP;
694 return NULL;
695 #endif
696
697 req = tevent_req_create(mem_ctx, &state, struct glusterfs_aio_state);
698 if (req == NULL) {
699 return NULL;
700 }
701 if (!init_gluster_aio(handle)) {
702 tevent_req_error(req, EIO);
703 return tevent_req_post(req, ev);
704 }
705 ret = glfs_pwrite_async(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle,
706 fsp), data, n, offset, 0, aio_glusterfs_done,
707 req);
708 if (ret < 0) {
709 tevent_req_error(req, -ret);
710 return tevent_req_post(req, ev);
711 }
712 return req;
713 }
714
715 static ssize_t vfs_gluster_recv(struct tevent_req *req, int *err)
716 {
717 struct glusterfs_aio_state *state = NULL;
718
719 #ifndef HAVE_EVENTFD
720 errno = ENOTSUP;
721 return -1;
722 #endif
723 state = tevent_req_data(req, struct glusterfs_aio_state);
724 if (state == NULL) {
725 return -1;
726 }
727
728 if (tevent_req_is_unix_error(req, err)) {
729 return -1;
730 }
731 if (state->ret == -1) {
732 *err = state->err;
733 }
734 return state->ret;
735 }
736
737 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
738 files_struct *fsp, off_t offset, int whence)
739 {
740 return glfs_lseek(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset, whence);
741 }
742
743 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
744 files_struct *fromfsp,
745 const DATA_BLOB *hdr,
746 off_t offset, size_t n)
747 {
748 errno = ENOTSUP;
749 return -1;
750 }
751
752 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
753 int fromfd, files_struct *tofsp,
754 off_t offset, size_t n)
755 {
756 errno = ENOTSUP;
757 return -1;
758 }
759
760 static int vfs_gluster_rename(struct vfs_handle_struct *handle,
761 const struct smb_filename *smb_fname_src,
762 const struct smb_filename *smb_fname_dst)
763 {
764 return glfs_rename(handle->data, smb_fname_src->base_name,
765 smb_fname_dst->base_name);
766 }
767
768 static int vfs_gluster_fsync(struct vfs_handle_struct *handle,
769 files_struct *fsp)
770 {
771 return glfs_fsync(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp));
772 }
773
774 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
775 *handle, TALLOC_CTX *mem_ctx,
776 struct tevent_context *ev,
777 files_struct *fsp)
778 {
779 struct tevent_req *req = NULL;
780 struct glusterfs_aio_state *state = NULL;
781 int ret = 0;
782
783 #ifndef HAVE_EVENTFD
784 errno = ENOTSUP;
785 return NULL;
786 #endif
787
788 req = tevent_req_create(mem_ctx, &state, struct glusterfs_aio_state);
789 if (req == NULL) {
790 return NULL;
791 }
792 if (!init_gluster_aio(handle)) {
793 tevent_req_error(req, EIO);
794 return tevent_req_post(req, ev);
795 }
796 ret = glfs_fsync_async(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle,
797 fsp), aio_glusterfs_done, req);
798 if (ret < 0) {
799 tevent_req_error(req, -ret);
800 return tevent_req_post(req, ev);
801 }
802 return req;
803 }
804
805 static int vfs_gluster_fsync_recv(struct tevent_req *req, int *err)
806 {
807 /*
808 * Use implicit conversion ssize_t->int
809 */
810 return vfs_gluster_recv(req, err);
811 }
812
813 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
814 struct smb_filename *smb_fname)
815 {
816 struct stat st;
817 int ret;
818
819 ret = glfs_stat(handle->data, smb_fname->base_name, &st);
820 if (ret == 0) {
821 smb_stat_ex_from_stat(&smb_fname->st, &st);
822 }
823 if (ret < 0 && errno != ENOENT) {
824 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
825 smb_fname->base_name, strerror(errno)));
826 }
827 return ret;
828 }
829
830 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
831 files_struct *fsp, SMB_STRUCT_STAT *sbuf)
832 {
833 struct stat st;
834 int ret;
835
836 ret = glfs_fstat(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), &st);
837 if (ret == 0) {
838 smb_stat_ex_from_stat(sbuf, &st);
839 }
840 if (ret < 0) {
841 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
842 fsp->fh->fd, strerror(errno)));
843 }
844 return ret;
845 }
846
847 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
848 struct smb_filename *smb_fname)
849 {
850 struct stat st;
851 int ret;
852
853 ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
854 if (ret == 0) {
855 smb_stat_ex_from_stat(&smb_fname->st, &st);
856 }
857 if (ret < 0 && errno != ENOENT) {
858 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
859 smb_fname->base_name, strerror(errno)));
860 }
861 return ret;
862 }
863
864 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
865 files_struct *fsp,
866 const SMB_STRUCT_STAT *sbuf)
867 {
868 return sbuf->st_ex_blocks * 512;
869 }
870
871 static int vfs_gluster_unlink(struct vfs_handle_struct *handle,
872 const struct smb_filename *smb_fname)
873 {
874 return glfs_unlink(handle->data, smb_fname->base_name);
875 }
876
877 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
878 const char *path, mode_t mode)
879 {
880 return glfs_chmod(handle->data, path, mode);
881 }
882
883 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
884 files_struct *fsp, mode_t mode)
885 {
886 return glfs_fchmod(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), mode);
887 }
888
889 static int vfs_gluster_chown(struct vfs_handle_struct *handle,
890 const char *path, uid_t uid, gid_t gid)
891 {
892 return glfs_chown(handle->data, path, uid, gid);
893 }
894
895 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
896 files_struct *fsp, uid_t uid, gid_t gid)
897 {
898 return glfs_fchown(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), uid, gid);
899 }
900
901 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
902 const char *path, uid_t uid, gid_t gid)
903 {
904 return glfs_lchown(handle->data, path, uid, gid);
905 }
906
907 static int vfs_gluster_chdir(struct vfs_handle_struct *handle, const char *path)
908 {
909 return glfs_chdir(handle->data, path);
910 }
911
912 static char *vfs_gluster_getwd(struct vfs_handle_struct *handle)
913 {
914 char *cwd;
915 char *ret;
916
917 cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
918 if (cwd == NULL) {
919 return NULL;
920 }
921
922 ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
923 if (ret == 0) {
924 free(cwd);
925 }
926 return ret;
927 }
928
929 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
930 const struct smb_filename *smb_fname,
931 struct smb_file_time *ft)
932 {
933 struct timespec times[2];
934
935 if (null_timespec(ft->atime)) {
936 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
937 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
938 } else {
939 times[0].tv_sec = ft->atime.tv_sec;
940 times[0].tv_nsec = ft->atime.tv_nsec;
941 }
942
943 if (null_timespec(ft->mtime)) {
944 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
945 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
946 } else {
947 times[1].tv_sec = ft->mtime.tv_sec;
948 times[1].tv_nsec = ft->mtime.tv_nsec;
949 }
950
951 if ((timespec_compare(&times[0],
952 &smb_fname->st.st_ex_atime) == 0) &&
953 (timespec_compare(&times[1],
954 &smb_fname->st.st_ex_mtime) == 0)) {
955 return 0;
956 }
957
958 return glfs_utimens(handle->data, smb_fname->base_name, times);
959 }
960
961 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
962 files_struct *fsp, off_t offset)
963 {
964 return glfs_ftruncate(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset);
965 }
966
967 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
968 struct files_struct *fsp,
969 enum vfs_fallocate_mode mode,
970 off_t offset, off_t len)
971 {
972 errno = ENOTSUP;
973 return -1;
974 }
975
976 static char *vfs_gluster_realpath(struct vfs_handle_struct *handle,
977 const char *path)
978 {
979 return glfs_realpath(handle->data, path, 0);
980 }
981
982 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
983 files_struct *fsp, int op, off_t offset,
984 off_t count, int type)
985 {
986 struct flock flock = { 0, };
987 int ret;
988
989 flock.l_type = type;
990 flock.l_whence = SEEK_SET;
991 flock.l_start = offset;
992 flock.l_len = count;
993 flock.l_pid = 0;
994
995 ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), op, &flock);
996
997 if (op == F_GETLK) {
998 /* lock query, true if someone else has locked */
999 if ((ret != -1) &&
1000 (flock.l_type != F_UNLCK) &&
1001 (flock.l_pid != 0) && (flock.l_pid != getpid()))
1002 return true;
1003 /* not me */
1004 return false;
1005 }
1006
1007 if (ret == -1) {
1008 return false;
1009 }
1010
1011 return true;
1012 }
1013
1014 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
1015 files_struct *fsp, uint32 share_mode,
1016 uint32_t access_mask)
1017 {
1018 errno = ENOSYS;
1019 return -1;
1020 }
1021
1022 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
1023 files_struct *fsp, int leasetype)
1024 {
1025 errno = ENOSYS;
1026 return -1;
1027 }
1028
1029 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
1030 files_struct *fsp, off_t *poffset,
1031 off_t *pcount, int *ptype, pid_t *ppid)
1032 {
1033 struct flock flock = { 0, };
1034 int ret;
1035
1036 flock.l_type = *ptype;
1037 flock.l_whence = SEEK_SET;
1038 flock.l_start = *poffset;
1039 flock.l_len = *pcount;
1040 flock.l_pid = 0;
1041
1042 ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), F_GETLK, &flock);
1043
1044 if (ret == -1) {
1045 return false;
1046 }
1047
1048 *ptype = flock.l_type;
1049 *poffset = flock.l_start;
1050 *pcount = flock.l_len;
1051 *ppid = flock.l_pid;
1052
1053 return true;
1054 }
1055
1056 static int vfs_gluster_symlink(struct vfs_handle_struct *handle,
1057 const char *oldpath, const char *newpath)
1058 {
1059 return glfs_symlink(handle->data, oldpath, newpath);
1060 }
1061
1062 static int vfs_gluster_readlink(struct vfs_handle_struct *handle,
1063 const char *path, char *buf, size_t bufsiz)
1064 {
1065 return glfs_readlink(handle->data, path, buf, bufsiz);
1066 }
1067
1068 static int vfs_gluster_link(struct vfs_handle_struct *handle,
1069 const char *oldpath, const char *newpath)
1070 {
1071 return glfs_link(handle->data, oldpath, newpath);
1072 }
1073
1074 static int vfs_gluster_mknod(struct vfs_handle_struct *handle, const char *path,
1075 mode_t mode, SMB_DEV_T dev)
1076 {
1077 return glfs_mknod(handle->data, path, mode, dev);
1078 }
1079
1080 static NTSTATUS vfs_gluster_notify_watch(struct vfs_handle_struct *handle,
1081 struct sys_notify_context *ctx,
1082 const char *path, uint32_t *filter,
1083 uint32_t *subdir_filter,
1084 void (*callback) (struct sys_notify_context *ctx,
1085 void *private_data,
1086 struct notify_event *ev),
1087 void *private_data, void *handle_p)
1088 {
1089 return NT_STATUS_NOT_IMPLEMENTED;
1090 }
1091
1092 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
1093 const char *path, unsigned int flags)
1094 {
1095 errno = ENOSYS;
1096 return -1;
1097 }
1098
1099 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
1100 const char *path, const char *name,
1101 TALLOC_CTX *mem_ctx, char **found_name)
1102 {
1103 int ret;
1104 char key_buf[NAME_MAX + 64];
1105 char val_buf[NAME_MAX + 1];
1106
1107 if (strlen(name) >= NAME_MAX) {
1108 errno = ENAMETOOLONG;
1109 return -1;
1110 }
1111
1112 snprintf(key_buf, NAME_MAX + 64,
1113 "user.glusterfs.get_real_filename:%s", name);
1114
1115 ret = glfs_getxattr(handle->data, path, key_buf, val_buf, NAME_MAX + 1);
1116 if (ret == -1) {
1117 if (errno == ENODATA) {
1118 errno = EOPNOTSUPP;
1119 }
1120 return -1;
1121 }
1122
1123 *found_name = talloc_strdup(mem_ctx, val_buf);
1124 if (found_name[0] == NULL) {
1125 errno = ENOMEM;
1126 return -1;
1127 }
1128 return 0;
1129 }
1130
1131 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
1132 const char *filename)
1133 {
1134 return handle->conn->connectpath;
1135 }
1136
1137 /* EA Operations */
1138
1139 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
1140 const char *path, const char *name,
1141 void *value, size_t size)
1142 {
1143 return glfs_getxattr(handle->data, path, name, value, size);
1144 }
1145
1146 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
1147 files_struct *fsp, const char *name,
1148 void *value, size_t size)
1149 {
1150 return glfs_fgetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size);
1151 }
1152
1153 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
1154 const char *path, char *list, size_t size)
1155 {
1156 return glfs_listxattr(handle->data, path, list, size);
1157 }
1158
1159 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
1160 files_struct *fsp, char *list,
1161 size_t size)
1162 {
1163 return glfs_flistxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), list, size);
1164 }
1165
1166 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
1167 const char *path, const char *name)
1168 {
1169 return glfs_removexattr(handle->data, path, name);
1170 }
1171
1172 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
1173 files_struct *fsp, const char *name)
1174 {
1175 return glfs_fremovexattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name);
1176 }
1177
1178 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
1179 const char *path, const char *name,
1180 const void *value, size_t size, int flags)
1181 {
1182 return glfs_setxattr(handle->data, path, name, value, size, flags);
1183 }
1184
1185 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
1186 files_struct *fsp, const char *name,
1187 const void *value, size_t size, int flags)
1188 {
1189 return glfs_fsetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size,
1190 flags);
1191 }
1192
1193 /* AIO Operations */
1194
1195 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
1196 files_struct *fsp)
1197 {
1198 return false;
1199 }
1200
1201 /* Offline Operations */
1202
1203 static bool vfs_gluster_is_offline(struct vfs_handle_struct *handle,
1204 const struct smb_filename *fname,
1205 SMB_STRUCT_STAT *sbuf)
1206 {
1207 return false;
1208 }
1209
1210 static int vfs_gluster_set_offline(struct vfs_handle_struct *handle,
1211 const struct smb_filename *fname)
1212 {
1213 errno = ENOTSUP;
1214 return -1;
1215 }
1216
1217 /*
1218 Gluster ACL Format:
1219
1220 Size = 4 (header) + N * 8 (entry)
1221
1222 Offset Size Field (Little Endian)
1223 -------------------------------------
1224 0-3 4-byte Version
1225
1226 4-5 2-byte Entry-1 tag
1227 6-7 2-byte Entry-1 perm
1228 8-11 4-byte Entry-1 id
1229
1230 12-13 2-byte Entry-2 tag
1231 14-15 2-byte Entry-2 perm
1232 16-19 4-byte Entry-2 id
1233
1234 ...
1235
1236 */
1237
1238 /* header version */
1239 #define GLUSTER_ACL_VERSION 2
1240
1241 /* perm bits */
1242 #define GLUSTER_ACL_READ 0x04
1243 #define GLUSTER_ACL_WRITE 0x02
1244 #define GLUSTER_ACL_EXECUTE 0x01
1245
1246 /* tag values */
1247 #define GLUSTER_ACL_UNDEFINED_TAG 0x00
1248 #define GLUSTER_ACL_USER_OBJ 0x01
1249 #define GLUSTER_ACL_USER 0x02
1250 #define GLUSTER_ACL_GROUP_OBJ 0x04
1251 #define GLUSTER_ACL_GROUP 0x08
1252 #define GLUSTER_ACL_MASK 0x10
1253 #define GLUSTER_ACL_OTHER 0x20
1254
1255 #define GLUSTER_ACL_UNDEFINED_ID (-1)
1256
1257 #define GLUSTER_ACL_HEADER_SIZE 4
1258 #define GLUSTER_ACL_ENTRY_SIZE 8
1259
1260 #define GLUSTER_ACL_SIZE(n) (GLUSTER_ACL_HEADER_SIZE + (n * GLUSTER_ACL_ENTRY_SIZE))
1261
1262 static SMB_ACL_T mode_to_smb_acls(const struct stat *mode, TALLOC_CTX *mem_ctx)
1263 {
1264 struct smb_acl_t *result;
1265 int count;
1266
1267 count = 3;
1268 result = sys_acl_init(mem_ctx);
1269 if (!result) {
1270 errno = ENOMEM;
1271 return NULL;
1272 }
1273
1274 result->acl = talloc_array(result, struct smb_acl_entry, count);
1275 if (!result->acl) {
1276 errno = ENOMEM;
1277 talloc_free(result);
1278 return NULL;
1279 }
1280
1281 result->count = count;
1282
1283 result->acl[0].a_type = SMB_ACL_USER_OBJ;
1284 result->acl[0].a_perm = (mode->st_mode & S_IRWXU) >> 6;;
1285
1286 result->acl[1].a_type = SMB_ACL_GROUP_OBJ;
1287 result->acl[1].a_perm = (mode->st_mode & S_IRWXG) >> 3;;
1288
1289 result->acl[2].a_type = SMB_ACL_OTHER;
1290 result->acl[2].a_perm = mode->st_mode & S_IRWXO;;
1291
1292 return result;
1293 }
1294
1295 static SMB_ACL_T gluster_to_smb_acl(const char *buf, size_t xattr_size,
1296 TALLOC_CTX *mem_ctx)
1297 {
1298 int count;
1299 size_t size;
1300 struct smb_acl_entry *smb_ace;
1301 struct smb_acl_t *result;
1302 int i;
1303 int offset;
1304 uint16_t tag;
1305 uint16_t perm;
1306 uint32_t id;
1307
1308 size = xattr_size;
1309
1310 if (size < GLUSTER_ACL_HEADER_SIZE) {
1311 /* ACL should be at least as big as the header (4 bytes) */
1312 errno = EINVAL;
1313 return NULL;
1314 }
1315
1316 size -= GLUSTER_ACL_HEADER_SIZE; /* size of header = 4 bytes */
1317
1318 if (size % GLUSTER_ACL_ENTRY_SIZE) {
1319 /* Size of entries must strictly be a multiple of
1320 size of an ACE (8 bytes)
1321 */
1322 errno = EINVAL;
1323 return NULL;
1324 }
1325
1326 count = size / GLUSTER_ACL_ENTRY_SIZE;
1327
1328 /* Version is the first 4 bytes of the ACL */
1329 if (IVAL(buf, 0) != GLUSTER_ACL_VERSION) {
1330 DEBUG(0, ("Unknown gluster ACL version: %d\n",
1331 IVAL(buf, 0)));
1332 return NULL;
1333 }
1334 offset = GLUSTER_ACL_HEADER_SIZE;
1335
1336 result = sys_acl_init(mem_ctx);
1337 if (!result) {
1338 errno = ENOMEM;
1339 return NULL;
1340 }
1341
1342 result->acl = talloc_array(result, struct smb_acl_entry, count);
1343 if (!result->acl) {
1344 errno = ENOMEM;
1345 talloc_free(result);
1346 return NULL;
1347 }
1348
1349 result->count = count;
1350
1351 smb_ace = result->acl;
1352
1353 for (i = 0; i < count; i++) {
1354 /* TAG is the first 2 bytes of an entry */
1355 tag = SVAL(buf, offset);
1356 offset += 2;
1357
1358 /* PERM is the next 2 bytes of an entry */
1359 perm = SVAL(buf, offset);
1360 offset += 2;
1361
1362 /* ID is the last 4 bytes of an entry */
1363 id = IVAL(buf, offset);
1364 offset += 4;
1365
1366 switch(tag) {
1367 case GLUSTER_ACL_USER:
1368 smb_ace->a_type = SMB_ACL_USER;
1369 break;
1370 case GLUSTER_ACL_USER_OBJ:
1371 smb_ace->a_type = SMB_ACL_USER_OBJ;
1372 break;
1373 case GLUSTER_ACL_GROUP:
1374 smb_ace->a_type = SMB_ACL_GROUP;
1375 break;
1376 case GLUSTER_ACL_GROUP_OBJ:
1377 smb_ace->a_type = SMB_ACL_GROUP_OBJ;
1378 break;
1379 case GLUSTER_ACL_OTHER:
1380 smb_ace->a_type = SMB_ACL_OTHER;
1381 break;
1382 case GLUSTER_ACL_MASK:
1383 smb_ace->a_type = SMB_ACL_MASK;
1384 break;
1385 default:
1386 DEBUG(0, ("unknown tag type %d\n", (unsigned int) tag));
1387 return NULL;
1388 }
1389
1390
1391 switch(smb_ace->a_type) {
1392 case SMB_ACL_USER:
1393 smb_ace->info.user.uid = id;
1394 break;
1395 case SMB_ACL_GROUP:
1396 smb_ace->info.group.gid = id;
1397 break;
1398 default:
1399 break;
1400 }
1401
1402 smb_ace->a_perm = 0;
1403 smb_ace->a_perm |=
1404 ((perm & GLUSTER_ACL_READ) ? SMB_ACL_READ : 0);
1405 smb_ace->a_perm |=
1406 ((perm & GLUSTER_ACL_WRITE) ? SMB_ACL_WRITE : 0);
1407 smb_ace->a_perm |=
1408 ((perm & GLUSTER_ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
1409
1410 smb_ace++;
1411 }
1412
1413 return result;
1414 }
1415
1416
1417 static int gluster_ace_cmp(const void *left, const void *right)
1418 {
1419 int ret = 0;
1420 uint16_t tag_left, tag_right;
1421 uint32_t id_left, id_right;
1422
1423 /*
1424 Sorting precedence:
1425
1426 - Smaller TAG values must be earlier.
1427
1428 - Within same TAG, smaller identifiers must be earlier, E.g:
1429 UID 0 entry must be earlier than UID 200
1430 GID 17 entry must be earlier than GID 19
1431 */
1432
1433 /* TAG is the first element in the entry */
1434 tag_left = SVAL(left, 0);
1435 tag_right = SVAL(right, 0);
1436
1437 ret = (tag_left - tag_right);
1438 if (!ret) {
1439 /* ID is the third element in the entry, after two short
1440 integers (tag and perm), i.e at offset 4.
1441 */
1442 id_left = IVAL(left, 4);
1443 id_right = IVAL(right, 4);
1444 ret = id_left - id_right;
1445 }
1446
1447 return ret;
1448 }
1449
1450
1451 static ssize_t smb_to_gluster_acl(SMB_ACL_T theacl, char *buf, size_t len)
1452 {
1453 ssize_t size;
1454 struct smb_acl_entry *smb_ace;
1455 int i;
1456 int count;
1457 uint16_t tag;
1458 uint16_t perm;
1459 uint32_t id;
1460 int offset;
1461
1462 count = theacl->count;
1463
1464 size = GLUSTER_ACL_HEADER_SIZE + (count * GLUSTER_ACL_ENTRY_SIZE);
1465 if (!buf) {
1466 return size;
1467 }
1468
1469 if (len < size) {
1470 errno = ERANGE;
1471 return -1;
1472 }
1473
1474 smb_ace = theacl->acl;
1475
1476 /* Version is the first 4 bytes of the ACL */
1477 SIVAL(buf, 0, GLUSTER_ACL_VERSION);
1478 offset = GLUSTER_ACL_HEADER_SIZE;
1479
1480 for (i = 0; i < count; i++) {
1481 /* Calculate tag */
1482 switch(smb_ace->a_type) {
1483 case SMB_ACL_USER:
1484 tag = GLUSTER_ACL_USER;
1485 break;
1486 case SMB_ACL_USER_OBJ:
1487 tag = GLUSTER_ACL_USER_OBJ;
1488 break;
1489 case SMB_ACL_GROUP:
1490 tag = GLUSTER_ACL_GROUP;
1491 break;
1492 case SMB_ACL_GROUP_OBJ:
1493 tag = GLUSTER_ACL_GROUP_OBJ;
1494 break;
1495 case SMB_ACL_OTHER:
1496 tag = GLUSTER_ACL_OTHER;
1497 break;
1498 case SMB_ACL_MASK:
1499 tag = GLUSTER_ACL_MASK;
1500 break;
1501 default:
1502 DEBUG(0, ("Unknown tag value %d\n",
1503 smb_ace->a_type));
1504 errno = EINVAL;
1505 return -1;
1506 }
1507
1508
1509 /* Calculate id */
1510 switch(smb_ace->a_type) {
1511 case SMB_ACL_USER:
1512 id = smb_ace->info.user.uid;
1513 break;
1514 case SMB_ACL_GROUP:
1515 id = smb_ace->info.group.gid;
1516 break;
1517 default:
1518 id = GLUSTER_ACL_UNDEFINED_ID;
1519 break;
1520 }
1521
1522 /* Calculate perm */
1523 perm = 0;
1524
1525 perm |=
1526 ((smb_ace->a_perm & SMB_ACL_READ) ? GLUSTER_ACL_READ : 0);
1527 perm |=
1528 ((smb_ace->a_perm & SMB_ACL_WRITE) ? GLUSTER_ACL_WRITE : 0);
1529 perm |=
1530 ((smb_ace->a_perm & SMB_ACL_EXECUTE) ? GLUSTER_ACL_EXECUTE : 0);
1531
1532
1533 /* TAG is the first 2 bytes of an entry */
1534 SSVAL(buf, offset, tag);
1535 offset += 2;
1536
1537 /* PERM is the next 2 bytes of an entry */
1538 SSVAL(buf, offset, perm);
1539 offset += 2;
1540
1541 /* ID is the last 4 bytes of an entry */
1542 SIVAL(buf, offset, id);
1543 offset += 4;
1544
1545 smb_ace++;
1546 }
1547
1548 /* Skip the header, sort @count number of 8-byte entries */
1549 qsort(buf+GLUSTER_ACL_HEADER_SIZE, count, GLUSTER_ACL_ENTRY_SIZE,
1550 gluster_ace_cmp);
1551
1552 return size;
1553 }
1554
1555
1556 static SMB_ACL_T vfs_gluster_sys_acl_get_file(struct vfs_handle_struct *handle,
1557 const char *path_p,
1558 SMB_ACL_TYPE_T type,
1559 TALLOC_CTX *mem_ctx)
1560 {
1561 struct smb_acl_t *result;
1562 struct stat st;
1563 char *buf;
1564 const char *key;
1565 ssize_t ret, size = GLUSTER_ACL_SIZE(20);
1566
1567 switch (type) {
1568 case SMB_ACL_TYPE_ACCESS:
1569 key = "system.posix_acl_access";
1570 break;
1571 case SMB_ACL_TYPE_DEFAULT:
1572 key = "system.posix_acl_default";
1573 break;
1574 default:
1575 errno = EINVAL;
1576 return NULL;
1577 }
1578
1579 buf = alloca(size);
1580 if (!buf) {
1581 return NULL;
1582 }
1583
1584 ret = glfs_getxattr(handle->data, path_p, key, buf, size);
1585 if (ret == -1 && errno == ERANGE) {
1586 ret = glfs_getxattr(handle->data, path_p, key, 0, 0);
1587 if (ret > 0) {
1588 buf = alloca(ret);
1589 if (!buf) {
1590 return NULL;
1591 }
1592 ret = glfs_getxattr(handle->data, path_p, key, buf, ret);
1593 }
1594 }
1595
1596 /* retrieving the ACL from the xattr has finally failed, do a
1597 * mode-to-acl mapping */
1598
1599 if (ret == -1 && errno == ENODATA) {
1600 ret = glfs_stat(handle->data, path_p, &st);
1601 if (ret == 0) {
1602 result = mode_to_smb_acls(&st, mem_ctx);
1603 return result;
1604 }
1605 }
1606
1607 if (ret <= 0) {
1608 return NULL;
1609 }
1610
1611 result = gluster_to_smb_acl(buf, ret, mem_ctx);
1612
1613 return result;
1614 }
1615
1616 static SMB_ACL_T vfs_gluster_sys_acl_get_fd(struct vfs_handle_struct *handle,
1617 struct files_struct *fsp,
1618 TALLOC_CTX *mem_ctx)
1619 {
1620 struct smb_acl_t *result;
1621 struct stat st;
1622 ssize_t ret, size = GLUSTER_ACL_SIZE(20);
1623 char *buf;
1624 glfs_fd_t *glfd;
1625
1626 glfd = *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1627
1628 buf = alloca(size);
1629 if (!buf) {
1630 return NULL;
1631 }
1632
1633 ret = glfs_fgetxattr(glfd, "system.posix_acl_access", buf, size);
1634 if (ret == -1 && errno == ERANGE) {
1635 ret = glfs_fgetxattr(glfd, "system.posix_acl_access", 0, 0);
1636 if (ret > 0) {
1637 buf = alloca(ret);
1638 if (!buf) {
1639 return NULL;
1640 }
1641 ret = glfs_fgetxattr(glfd, "system.posix_acl_access",
1642 buf, ret);
1643 }
1644 }
1645
1646 /* retrieving the ACL from the xattr has finally failed, do a
1647 * mode-to-acl mapping */
1648
1649 if (ret == -1 && errno == ENODATA) {
1650 ret = glfs_fstat(glfd, &st);
1651 if (ret == 0) {
1652 result = mode_to_smb_acls(&st, mem_ctx);
1653 return result;
1654 }
1655 }
1656
1657 if (ret <= 0) {
1658 return NULL;
1659 }
1660
1661 result = gluster_to_smb_acl(buf, ret, mem_ctx);
1662
1663 return result;
1664 }
1665
1666 static int vfs_gluster_sys_acl_set_file(struct vfs_handle_struct *handle,
1667 const char *name,
1668 SMB_ACL_TYPE_T acltype,
1669 SMB_ACL_T theacl)
1670 {
1671 int ret;
1672 const char *key;
1673 char *buf;
1674 ssize_t size;
1675
1676 switch (acltype) {
1677 case SMB_ACL_TYPE_ACCESS:
1678 key = "system.posix_acl_access";
1679 break;
1680 case SMB_ACL_TYPE_DEFAULT:
1681 key = "system.posix_acl_default";
1682 break;
1683 default:
1684 errno = EINVAL;
1685 return -1;
1686 }
1687
1688 size = smb_to_gluster_acl(theacl, 0, 0);
1689 buf = alloca(size);
1690
1691 size = smb_to_gluster_acl(theacl, buf, size);
1692 if (size == -1) {
1693 return -1;
1694 }
1695
1696 ret = glfs_setxattr(handle->data, name, key, buf, size, 0);
1697
1698 return ret;
1699 }
1700
1701 static int vfs_gluster_sys_acl_set_fd(struct vfs_handle_struct *handle,
1702 struct files_struct *fsp,
1703 SMB_ACL_T theacl)
1704 {
1705 int ret;
1706 char *buf;
1707 ssize_t size;
1708
1709 size = smb_to_gluster_acl(theacl, 0, 0);
1710 buf = alloca(size);
1711
1712 size = smb_to_gluster_acl(theacl, buf, size);
1713 if (size == -1) {
1714 return -1;
1715 }
1716
1717 ret = glfs_fsetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp),
1718 "system.posix_acl_access", buf, size, 0);
1719 return ret;
1720 }
1721
1722 static int vfs_gluster_sys_acl_delete_def_file(struct vfs_handle_struct *handle,
1723 const char *path)
1724 {
1725 return glfs_removexattr(handle->data, path, "system.posix_acl_default");
1726 }
1727
1728 static struct vfs_fn_pointers glusterfs_fns = {
1729
1730 /* Disk Operations */
1731
1732 .connect_fn = vfs_gluster_connect,
1733 .disconnect_fn = vfs_gluster_disconnect,
1734 .disk_free_fn = vfs_gluster_disk_free,
1735 .get_quota_fn = vfs_gluster_get_quota,
1736 .set_quota_fn = vfs_gluster_set_quota,
1737 .statvfs_fn = vfs_gluster_statvfs,
1738 .fs_capabilities_fn = vfs_gluster_fs_capabilities,
1739
1740 .get_dfs_referrals_fn = NULL,
1741
1742 /* Directory Operations */
1743
1744 .opendir_fn = vfs_gluster_opendir,
1745 .fdopendir_fn = vfs_gluster_fdopendir,
1746 .readdir_fn = vfs_gluster_readdir,
1747 .seekdir_fn = vfs_gluster_seekdir,
1748 .telldir_fn = vfs_gluster_telldir,
1749 .rewind_dir_fn = vfs_gluster_rewinddir,
1750 .mkdir_fn = vfs_gluster_mkdir,
1751 .rmdir_fn = vfs_gluster_rmdir,
1752 .closedir_fn = vfs_gluster_closedir,
1753 .init_search_op_fn = vfs_gluster_init_search_op,
1754
1755 /* File Operations */
1756
1757 .open_fn = vfs_gluster_open,
1758 .create_file_fn = NULL,
1759 .close_fn = vfs_gluster_close,
1760 .read_fn = vfs_gluster_read,
1761 .pread_fn = vfs_gluster_pread,
1762 .pread_send_fn = vfs_gluster_pread_send,
1763 .pread_recv_fn = vfs_gluster_recv,
1764 .write_fn = vfs_gluster_write,
1765 .pwrite_fn = vfs_gluster_pwrite,
1766 .pwrite_send_fn = vfs_gluster_pwrite_send,
1767 .pwrite_recv_fn = vfs_gluster_recv,
1768 .lseek_fn = vfs_gluster_lseek,
1769 .sendfile_fn = vfs_gluster_sendfile,
1770 .recvfile_fn = vfs_gluster_recvfile,
1771 .rename_fn = vfs_gluster_rename,
1772 .fsync_fn = vfs_gluster_fsync,
1773 .fsync_send_fn = vfs_gluster_fsync_send,
1774 .fsync_recv_fn = vfs_gluster_fsync_recv,
1775
1776 .stat_fn = vfs_gluster_stat,
1777 .fstat_fn = vfs_gluster_fstat,
1778 .lstat_fn = vfs_gluster_lstat,
1779 .get_alloc_size_fn = vfs_gluster_get_alloc_size,
1780 .unlink_fn = vfs_gluster_unlink,
1781
1782 .chmod_fn = vfs_gluster_chmod,
1783 .fchmod_fn = vfs_gluster_fchmod,
1784 .chown_fn = vfs_gluster_chown,
1785 .fchown_fn = vfs_gluster_fchown,
1786 .lchown_fn = vfs_gluster_lchown,
1787 .chdir_fn = vfs_gluster_chdir,
1788 .getwd_fn = vfs_gluster_getwd,
1789 .ntimes_fn = vfs_gluster_ntimes,
1790 .ftruncate_fn = vfs_gluster_ftruncate,
1791 .fallocate_fn = vfs_gluster_fallocate,
1792 .lock_fn = vfs_gluster_lock,
1793 .kernel_flock_fn = vfs_gluster_kernel_flock,
1794 .linux_setlease_fn = vfs_gluster_linux_setlease,
1795 .getlock_fn = vfs_gluster_getlock,
1796 .symlink_fn = vfs_gluster_symlink,
1797 .readlink_fn = vfs_gluster_readlink,
1798 .link_fn = vfs_gluster_link,
1799 .mknod_fn = vfs_gluster_mknod,
1800 .realpath_fn = vfs_gluster_realpath,
1801 .notify_watch_fn = vfs_gluster_notify_watch,
1802 .chflags_fn = vfs_gluster_chflags,
1803 .file_id_create_fn = NULL,
1804 .copy_chunk_send_fn = NULL,
1805 .copy_chunk_recv_fn = NULL,
1806 .streaminfo_fn = NULL,
1807 .get_real_filename_fn = vfs_gluster_get_real_filename,
1808 .connectpath_fn = vfs_gluster_connectpath,
1809
1810 .brl_lock_windows_fn = NULL,
1811 .brl_unlock_windows_fn = NULL,
1812 .brl_cancel_windows_fn = NULL,
1813 .strict_lock_fn = NULL,
1814 .strict_unlock_fn = NULL,
1815 .translate_name_fn = NULL,
1816 .fsctl_fn = NULL,
1817
1818 /* NT ACL Operations */
1819 .fget_nt_acl_fn = NULL,
1820 .get_nt_acl_fn = NULL,
1821 .fset_nt_acl_fn = NULL,
1822 .audit_file_fn = NULL,
1823
1824 /* Posix ACL Operations */
1825 .chmod_acl_fn = NULL, /* passthrough to default */
1826 .fchmod_acl_fn = NULL, /* passthrough to default */
1827 .sys_acl_get_file_fn = vfs_gluster_sys_acl_get_file,
1828 .sys_acl_get_fd_fn = vfs_gluster_sys_acl_get_fd,
1829 .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
1830 .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
1831 .sys_acl_set_file_fn = vfs_gluster_sys_acl_set_file,
1832 .sys_acl_set_fd_fn = vfs_gluster_sys_acl_set_fd,
1833 .sys_acl_delete_def_file_fn = vfs_gluster_sys_acl_delete_def_file,
1834
1835 /* EA Operations */
1836 .getxattr_fn = vfs_gluster_getxattr,
1837 .fgetxattr_fn = vfs_gluster_fgetxattr,
1838 .listxattr_fn = vfs_gluster_listxattr,
1839 .flistxattr_fn = vfs_gluster_flistxattr,
1840 .removexattr_fn = vfs_gluster_removexattr,
1841 .fremovexattr_fn = vfs_gluster_fremovexattr,
1842 .setxattr_fn = vfs_gluster_setxattr,
1843 .fsetxattr_fn = vfs_gluster_fsetxattr,
1844
1845 /* AIO Operations */
1846 .aio_force_fn = vfs_gluster_aio_force,
1847
1848 /* Offline Operations */
1849 .is_offline_fn = vfs_gluster_is_offline,
1850 .set_offline_fn = vfs_gluster_set_offline,
1851
1852 /* Durable handle Operations */
1853 .durable_cookie_fn = NULL,
1854 .durable_disconnect_fn = NULL,
1855 .durable_reconnect_fn = NULL,
1856 };
1857
1858 NTSTATUS vfs_glusterfs_init(void);
1859 NTSTATUS vfs_glusterfs_init(void)
1860 {
1861 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
1862 "glusterfs", &glusterfs_fns);
1863 }
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