2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-2000
5 Copyright (C) Jeremy Allison 1992-2006
6 Copyright (C) Volker Lendecke 2005
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.
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.
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/>.
23 12 aug 96: Erik.Devriendt@te6.siemens.be
24 added support for shared memory implementation of share mode locking
26 May 1997. Jeremy Allison (jallison@whistle.com). Modified share mode
27 locking to deal with multiple share modes per open file.
29 September 1997. Jeremy Allison (jallison@whistle.com). Added oplock
32 rewritten completely to use new tdb code. Tridge, Dec '99
34 Added POSIX locking support. Jeremy Allison (jeremy@valinux.com), Apr. 2000.
35 Added Unix Extensions POSIX locking support. Jeremy Allison Mar 2006.
39 #include "system/filesys.h"
40 #include "lib/util/server_id.h"
41 #include "locking/proto.h"
42 #include "smbd/globals.h"
43 #include "dbwrap/dbwrap.h"
44 #include "dbwrap/dbwrap_open.h"
45 #include "../libcli/security/security.h"
49 #include "../librpc/gen_ndr/ndr_open_files.h"
50 #include "source3/lib/dbwrap/dbwrap_watch.h"
51 #include "locking/leases_db.h"
52 #include "../lib/util/memcache.h"
53 #include "lib/util/tevent_ntstatus.h"
56 #define DBGC_CLASS DBGC_LOCKING
58 #define NO_LOCKING_COUNT (-1)
60 /* the locking database handle */
61 static struct db_context *lock_db;
63 static bool locking_init_internal(bool read_only)
65 struct db_context *backend;
73 db_path = lock_path(talloc_tos(), "locking.tdb");
74 if (db_path == NULL) {
78 backend = db_open(NULL, db_path,
79 SMB_OPEN_DATABASE_TDB_HASH_SIZE,
80 TDB_DEFAULT|TDB_VOLATILE|TDB_CLEAR_IF_FIRST|TDB_INCOMPATIBLE_HASH,
81 read_only?O_RDONLY:O_RDWR|O_CREAT, 0644,
82 DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
85 DEBUG(0,("ERROR: Failed to initialise locking database\n"));
89 lock_db = db_open_watched(NULL, &backend, global_messaging_context());
90 if (lock_db == NULL) {
91 DBG_ERR("db_open_watched failed\n");
96 if (!posix_locking_init(read_only)) {
104 bool locking_init(void)
106 return locking_init_internal(false);
109 bool locking_init_readonly(void)
111 return locking_init_internal(true);
114 /*******************************************************************
115 Deinitialize the share_mode management.
116 ******************************************************************/
118 bool locking_end(void)
121 TALLOC_FREE(lock_db);
125 /*******************************************************************
126 Form a static locking key for a dev/inode pair.
127 ******************************************************************/
129 static TDB_DATA locking_key(const struct file_id *id)
131 return make_tdb_data((const uint8_t *)id, sizeof(*id));
134 /*******************************************************************
135 Share mode cache utility functions that store/delete/retrieve
136 entries from memcache.
138 For now share the statcache (global cache) memory space. If
139 a lock record gets orphaned (which shouldn't happen as we're
140 using the same locking_key data as lookup) it will eventually
141 fall out of the cache via the normal LRU trim mechanism. If
142 necessary we can always make this a separate (smaller) cache.
143 ******************************************************************/
145 static DATA_BLOB memcache_key(const struct file_id *id)
147 return data_blob_const((const void *)id, sizeof(*id));
150 static void share_mode_memcache_delete(struct share_mode_data *d)
152 const DATA_BLOB key = memcache_key(&d->id);
154 DBG_DEBUG("deleting entry for file %s seq %"PRIx64" key %s\n",
157 file_id_string(talloc_tos(), &d->id));
159 memcache_delete(NULL,
160 SHARE_MODE_LOCK_CACHE,
164 static void share_mode_memcache_store(struct share_mode_data *d)
166 const DATA_BLOB key = memcache_key(&d->id);
168 DBG_DEBUG("stored entry for file %s seq %"PRIx64" key %s\n",
171 file_id_string(talloc_tos(), &d->id));
173 /* Ensure everything stored in the cache is pristine. */
178 * Ensure the memory going into the cache
179 * doesn't have a destructor so it can be
180 * cleanly freed by share_mode_memcache_delete().
182 talloc_set_destructor(d, NULL);
184 /* Cache will own d after this call. */
185 memcache_add_talloc(NULL,
186 SHARE_MODE_LOCK_CACHE,
192 * NB. We use ndr_pull_hyper on a stack-created
193 * struct ndr_pull with no talloc allowed, as we
194 * need this to be really fast as an ndr-peek into
195 * the first 8 bytes of the blob.
198 static enum ndr_err_code get_blob_sequence_number(DATA_BLOB *blob,
201 struct ndr_pull ndr = {.data = blob->data, .data_size = blob->length};
202 NDR_CHECK(ndr_pull_hyper(&ndr, NDR_SCALARS, pseq));
203 return NDR_ERR_SUCCESS;
206 static int share_mode_data_nofree_destructor(struct share_mode_data *d)
211 static struct share_mode_data *share_mode_memcache_fetch(TALLOC_CTX *mem_ctx,
212 const TDB_DATA id_key,
215 enum ndr_err_code ndr_err;
216 struct share_mode_data *d;
217 uint64_t sequence_number;
222 /* Ensure this is a locking_key record. */
223 if (id_key.dsize != sizeof(id)) {
227 memcpy(&id, id_key.dptr, id_key.dsize);
228 key = memcache_key(&id);
230 ptr = memcache_lookup_talloc(NULL,
231 SHARE_MODE_LOCK_CACHE,
234 DEBUG(10,("failed to find entry for key %s\n",
235 file_id_string(mem_ctx, &id)));
238 /* sequence number key is at start of blob. */
239 ndr_err = get_blob_sequence_number(blob, &sequence_number);
240 if (ndr_err != NDR_ERR_SUCCESS) {
241 /* Bad blob. Remove entry. */
242 DEBUG(10,("bad blob %u key %s\n",
243 (unsigned int)ndr_err,
244 file_id_string(mem_ctx, &id)));
245 memcache_delete(NULL,
246 SHARE_MODE_LOCK_CACHE,
251 d = (struct share_mode_data *)ptr;
252 if (d->sequence_number != sequence_number) {
253 DBG_DEBUG("seq changed (cached %"PRIx64") (new %"PRIx64") "
257 file_id_string(mem_ctx, &id));
258 /* Cache out of date. Remove entry. */
259 memcache_delete(NULL,
260 SHARE_MODE_LOCK_CACHE,
265 /* Move onto mem_ctx. */
266 d = talloc_move(mem_ctx, &ptr);
269 * Now we own d, prevent the cache from freeing it
270 * when we delete the entry.
272 talloc_set_destructor(d, share_mode_data_nofree_destructor);
274 /* Remove from the cache. We own it now. */
275 memcache_delete(NULL,
276 SHARE_MODE_LOCK_CACHE,
279 /* And reset the destructor to none. */
280 talloc_set_destructor(d, NULL);
282 DBG_DEBUG("fetched entry for file %s seq %"PRIx64" key %s\n",
285 file_id_string(mem_ctx, &id));
290 /*******************************************************************
291 Get all share mode entries for a dev/inode pair.
292 ********************************************************************/
294 static struct share_mode_data *parse_share_modes(TALLOC_CTX *mem_ctx,
298 struct share_mode_data *d;
299 enum ndr_err_code ndr_err;
302 blob.data = dbuf.dptr;
303 blob.length = dbuf.dsize;
305 /* See if we already have a cached copy of this key. */
306 d = share_mode_memcache_fetch(mem_ctx, key, &blob);
311 d = talloc(mem_ctx, struct share_mode_data);
313 DEBUG(0, ("talloc failed\n"));
317 ndr_err = ndr_pull_struct_blob_all(
318 &blob, d, d, (ndr_pull_flags_fn_t)ndr_pull_share_mode_data);
319 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
320 DEBUG(1, ("ndr_pull_share_mode_lock failed: %s\n",
321 ndr_errstr(ndr_err)));
325 if (DEBUGLEVEL >= 10) {
326 DEBUG(10, ("parse_share_modes:\n"));
327 NDR_PRINT_DEBUG(share_mode_data, d);
336 /*******************************************************************
337 Create a storable data blob from a modified share_mode_data struct.
338 ********************************************************************/
340 static TDB_DATA unparse_share_modes(struct share_mode_data *d)
343 enum ndr_err_code ndr_err;
345 if (DEBUGLEVEL >= 10) {
346 DEBUG(10, ("unparse_share_modes:\n"));
347 NDR_PRINT_DEBUG(share_mode_data, d);
350 share_mode_memcache_delete(d);
352 /* Update the sequence number. */
353 d->sequence_number += 1;
355 remove_stale_share_mode_entries(d);
357 if (d->num_share_modes == 0) {
358 DEBUG(10, ("No used share mode found\n"));
359 return make_tdb_data(NULL, 0);
362 ndr_err = ndr_push_struct_blob(
363 &blob, d, d, (ndr_push_flags_fn_t)ndr_push_share_mode_data);
364 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
365 smb_panic("ndr_push_share_mode_lock failed");
368 return make_tdb_data(blob.data, blob.length);
371 /*******************************************************************
372 If modified, store the share_mode_data back into the database.
373 ********************************************************************/
375 static int share_mode_data_destructor(struct share_mode_data *d)
384 data = unparse_share_modes(d);
386 if (data.dptr == NULL) {
388 /* There has been an entry before, delete it */
390 status = dbwrap_record_delete(d->record);
391 if (!NT_STATUS_IS_OK(status)) {
394 DEBUG(0, ("delete_rec returned %s\n",
397 if (asprintf(&errmsg, "could not delete share "
399 nt_errstr(status)) == -1) {
400 smb_panic("could not delete share"
407 * Nothing to store in cache - allow the normal
408 * release of record lock and memory free.
413 status = dbwrap_record_store(d->record, data, TDB_REPLACE);
414 if (!NT_STATUS_IS_OK(status)) {
417 DEBUG(0, ("store returned %s\n", nt_errstr(status)));
419 if (asprintf(&errmsg, "could not store share mode entry: %s",
420 nt_errstr(status)) == -1) {
421 smb_panic("could not store share mode entry");
427 * Release the record lock before putting in the cache.
429 TALLOC_FREE(d->record);
432 * Release the dptr as well before reparenting to NULL
433 * (in-memory cache) context.
435 TALLOC_FREE(data.dptr);
437 * Reparent d into the in-memory cache so it can be reused if the
438 * sequence number matches. See parse_share_modes()
442 share_mode_memcache_store(d);
446 /*******************************************************************
447 Allocate a new share_mode_data struct, mark it unmodified.
448 fresh is set to note that currently there is no database entry.
449 ********************************************************************/
451 static struct share_mode_data *fresh_share_mode_lock(
452 TALLOC_CTX *mem_ctx, const char *servicepath,
453 const struct smb_filename *smb_fname,
454 const struct timespec *old_write_time)
456 struct share_mode_data *d;
458 if ((servicepath == NULL) || (smb_fname == NULL) ||
459 (old_write_time == NULL)) {
463 d = talloc_zero(mem_ctx, struct share_mode_data);
467 /* New record - new sequence number. */
468 generate_random_buffer((uint8_t *)&d->sequence_number, 8);
470 d->base_name = talloc_strdup(d, smb_fname->base_name);
471 if (d->base_name == NULL) {
474 if (smb_fname->stream_name != NULL) {
475 d->stream_name = talloc_strdup(d, smb_fname->stream_name);
476 if (d->stream_name == NULL) {
480 d->servicepath = talloc_strdup(d, servicepath);
481 if (d->servicepath == NULL) {
484 d->old_write_time = *old_write_time;
489 DEBUG(0, ("talloc failed\n"));
494 /*******************************************************************
495 Either fetch a share mode from the database, or allocate a fresh
496 one if the record doesn't exist.
497 ********************************************************************/
499 static struct share_mode_lock *get_share_mode_lock_internal(
500 TALLOC_CTX *mem_ctx, struct file_id id,
501 const char *servicepath, const struct smb_filename *smb_fname,
502 const struct timespec *old_write_time)
504 struct share_mode_lock *lck;
505 struct share_mode_data *d;
506 struct db_record *rec;
507 TDB_DATA key = locking_key(&id);
510 rec = dbwrap_fetch_locked(lock_db, mem_ctx, key);
512 DEBUG(3, ("Could not lock share entry\n"));
516 value = dbwrap_record_get_value(rec);
518 if (value.dptr == NULL) {
519 d = fresh_share_mode_lock(mem_ctx, servicepath, smb_fname,
522 d = parse_share_modes(mem_ctx, key, value);
526 DEBUG(5, ("get_share_mode_lock_internal: "
527 "Could not get share mode lock\n"));
532 d->record = talloc_move(d, &rec);
533 talloc_set_destructor(d, share_mode_data_destructor);
535 lck = talloc(mem_ctx, struct share_mode_lock);
537 DEBUG(1, ("talloc failed\n"));
541 lck->data = talloc_move(lck, &d);
546 * We can only ever have one share mode locked. Users of
547 * get_share_mode_lock never see this, it will be refcounted by
550 static struct share_mode_lock *the_lock;
552 static int the_lock_destructor(struct share_mode_lock *l)
558 /*******************************************************************
559 Get a share_mode_lock, Reference counted to allow nested calls.
560 ********************************************************************/
562 struct share_mode_lock *get_share_mode_lock(
565 const char *servicepath,
566 const struct smb_filename *smb_fname,
567 const struct timespec *old_write_time)
569 struct share_mode_lock *lck;
571 lck = talloc(mem_ctx, struct share_mode_lock);
573 DEBUG(1, ("talloc failed\n"));
577 if (the_lock == NULL) {
578 the_lock = get_share_mode_lock_internal(
579 lck, id, servicepath, smb_fname, old_write_time);
580 if (the_lock == NULL) {
583 talloc_set_destructor(the_lock, the_lock_destructor);
585 if (!file_id_equal(&the_lock->data->id, &id)) {
586 DEBUG(1, ("Can not lock two share modes "
587 "simultaneously\n"));
590 if (talloc_reference(lck, the_lock) == NULL) {
591 DEBUG(1, ("talloc_reference failed\n"));
595 lck->data = the_lock->data;
602 struct fetch_share_mode_unlocked_state {
604 struct share_mode_lock *lck;
607 static void fetch_share_mode_unlocked_parser(
608 TDB_DATA key, TDB_DATA data, void *private_data)
610 struct fetch_share_mode_unlocked_state *state = private_data;
612 if (data.dsize == 0) {
613 /* Likely a ctdb tombstone record, ignore it */
617 state->lck = talloc(state->mem_ctx, struct share_mode_lock);
618 if (state->lck == NULL) {
619 DEBUG(0, ("talloc failed\n"));
623 state->lck->data = parse_share_modes(state->lck, key, data);
626 /*******************************************************************
627 Get a share_mode_lock without locking the database or reference
628 counting. Used by smbstatus to display existing share modes.
629 ********************************************************************/
631 struct share_mode_lock *fetch_share_mode_unlocked(TALLOC_CTX *mem_ctx,
634 struct fetch_share_mode_unlocked_state state = { .mem_ctx = mem_ctx };
635 TDB_DATA key = locking_key(&id);
638 status = dbwrap_parse_record(
639 lock_db, key, fetch_share_mode_unlocked_parser, &state);
640 if (!NT_STATUS_IS_OK(status)) {
646 static void fetch_share_mode_done(struct tevent_req *subreq);
648 struct fetch_share_mode_state {
651 struct fetch_share_mode_unlocked_state parser_state;
652 enum dbwrap_req_state req_state;
656 * @brief Get a share_mode_lock without locking or refcounting
658 * This can be used in a clustered Samba environment where the async dbwrap
659 * request is sent over a socket to the local ctdbd. If the send queue is full
660 * and the caller was issuing multiple async dbwrap requests in a loop, the
661 * caller knows it's probably time to stop sending requests for now and try
664 * @param[in] mem_ctx The talloc memory context to use.
666 * @param[in] ev The event context to work on.
668 * @param[in] id The file id for the locking.tdb key
670 * @param[out] queued This boolean out parameter tells the caller whether the
671 * async request is blocked in a full send queue:
673 * false := request is dispatched
675 * true := send queue is full, request waiting to be
678 * @return The new async request, NULL on error.
680 struct tevent_req *fetch_share_mode_send(TALLOC_CTX *mem_ctx,
681 struct tevent_context *ev,
685 struct tevent_req *req = NULL;
686 struct fetch_share_mode_state *state = NULL;
687 struct tevent_req *subreq = NULL;
691 req = tevent_req_create(mem_ctx, &state,
692 struct fetch_share_mode_state);
698 state->key = locking_key(&state->id);
699 state->parser_state.mem_ctx = state;
701 subreq = dbwrap_parse_record_send(state,
705 fetch_share_mode_unlocked_parser,
706 &state->parser_state,
708 if (tevent_req_nomem(subreq, req)) {
709 return tevent_req_post(req, ev);
711 tevent_req_set_callback(subreq, fetch_share_mode_done, req);
713 if (state->req_state < DBWRAP_REQ_DISPATCHED) {
719 static void fetch_share_mode_done(struct tevent_req *subreq)
721 struct tevent_req *req = tevent_req_callback_data(
722 subreq, struct tevent_req);
725 status = dbwrap_parse_record_recv(subreq);
727 if (tevent_req_nterror(req, status)) {
731 tevent_req_done(req);
735 NTSTATUS fetch_share_mode_recv(struct tevent_req *req,
737 struct share_mode_lock **_lck)
739 struct fetch_share_mode_state *state = tevent_req_data(
740 req, struct fetch_share_mode_state);
741 struct share_mode_lock *lck = NULL;
745 if (tevent_req_is_nterror(req, &status)) {
746 tevent_req_received(req);
750 if (state->parser_state.lck->data == NULL) {
751 tevent_req_received(req);
752 return NT_STATUS_NOT_FOUND;
755 lck = talloc_move(mem_ctx, &state->parser_state.lck);
757 if (DEBUGLEVEL >= 10) {
758 DBG_DEBUG("share_mode_data:\n");
759 NDR_PRINT_DEBUG(share_mode_data, lck->data);
763 tevent_req_received(req);
767 struct share_mode_forall_state {
768 int (*fn)(struct file_id fid, const struct share_mode_data *data,
773 static int share_mode_traverse_fn(struct db_record *rec, void *_state)
775 struct share_mode_forall_state *state =
776 (struct share_mode_forall_state *)_state;
780 enum ndr_err_code ndr_err;
781 struct share_mode_data *d;
785 key = dbwrap_record_get_key(rec);
786 value = dbwrap_record_get_value(rec);
788 /* Ensure this is a locking_key record. */
789 if (key.dsize != sizeof(fid)) {
792 memcpy(&fid, key.dptr, sizeof(fid));
794 d = talloc(talloc_tos(), struct share_mode_data);
799 blob.data = value.dptr;
800 blob.length = value.dsize;
802 ndr_err = ndr_pull_struct_blob_all(
803 &blob, d, d, (ndr_pull_flags_fn_t)ndr_pull_share_mode_data);
804 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
805 DEBUG(1, ("ndr_pull_share_mode_lock failed\n"));
809 if (DEBUGLEVEL > 10) {
810 DEBUG(11, ("parse_share_modes:\n"));
811 NDR_PRINT_DEBUG(share_mode_data, d);
814 ret = state->fn(fid, d, state->private_data);
820 int share_mode_forall(int (*fn)(struct file_id fid,
821 const struct share_mode_data *data,
825 struct share_mode_forall_state state = {
827 .private_data = private_data
832 if (lock_db == NULL) {
836 status = dbwrap_traverse_read(lock_db, share_mode_traverse_fn,
838 if (!NT_STATUS_IS_OK(status)) {
845 struct share_entry_forall_state {
846 int (*fn)(struct file_id fid,
847 const struct share_mode_data *data,
848 const struct share_mode_entry *entry,
853 static int share_entry_traverse_fn(struct file_id fid,
854 const struct share_mode_data *data,
857 struct share_entry_forall_state *state = private_data;
860 for (i=0; i<data->num_share_modes; i++) {
865 &data->share_modes[i],
866 state->private_data);
875 /*******************************************************************
876 Call the specified function on each entry under management by the
878 ********************************************************************/
880 int share_entry_forall(int (*fn)(struct file_id fid,
881 const struct share_mode_data *data,
882 const struct share_mode_entry *entry,
886 struct share_entry_forall_state state = {
887 .fn = fn, .private_data = private_data };
889 return share_mode_forall(share_entry_traverse_fn, &state);
892 static bool cleanup_disconnected_lease(struct share_mode_lock *lck,
893 struct share_mode_entry *e,
896 struct share_mode_data *d = lck->data;
899 status = leases_db_del(&e->client_guid, &e->lease_key, &d->id);
901 if (!NT_STATUS_IS_OK(status)) {
902 DBG_DEBUG("leases_db_del failed: %s\n",
909 bool share_mode_cleanup_disconnected(struct file_id fid,
910 uint64_t open_persistent_id)
913 TALLOC_CTX *frame = talloc_stackframe();
915 struct share_mode_data *data;
916 struct share_mode_lock *lck;
919 lck = get_existing_share_mode_lock(frame, fid);
921 DEBUG(5, ("share_mode_cleanup_disconnected: "
922 "Could not fetch share mode entry for %s\n",
923 file_id_string(frame, &fid)));
928 for (n=0; n < data->num_share_modes; n++) {
929 struct share_mode_entry *entry = &data->share_modes[n];
931 if (!server_id_is_disconnected(&entry->pid)) {
932 struct server_id_buf tmp;
933 DEBUG(5, ("share_mode_cleanup_disconnected: "
934 "file (file-id='%s', servicepath='%s', "
935 "base_name='%s%s%s') "
936 "is used by server %s ==> do not cleanup\n",
937 file_id_string(frame, &fid),
940 (data->stream_name == NULL)
941 ? "" : "', stream_name='",
942 (data->stream_name == NULL)
943 ? "" : data->stream_name,
944 server_id_str_buf(entry->pid, &tmp)));
947 if (open_persistent_id != entry->share_file_id) {
948 DBG_INFO("entry for file "
949 "(file-id='%s', servicepath='%s', "
950 "base_name='%s%s%s') "
951 "has share_file_id %"PRIu64" but expected "
952 "%"PRIu64"==> do not cleanup\n",
953 file_id_string(frame, &fid),
956 (data->stream_name == NULL)
957 ? "" : "', stream_name='",
958 (data->stream_name == NULL)
959 ? "" : data->stream_name,
960 entry->share_file_id,
966 ok = share_mode_forall_leases(lck, cleanup_disconnected_lease, NULL);
968 DBG_DEBUG("failed to clean up leases associated "
969 "with file (file-id='%s', servicepath='%s', "
970 "base_name='%s%s%s') and open_persistent_id %"PRIu64" "
971 "==> do not cleanup\n",
972 file_id_string(frame, &fid),
975 (data->stream_name == NULL)
976 ? "" : "', stream_name='",
977 (data->stream_name == NULL)
978 ? "" : data->stream_name,
982 ok = brl_cleanup_disconnected(fid, open_persistent_id);
984 DBG_DEBUG("failed to clean up byte range locks associated "
985 "with file (file-id='%s', servicepath='%s', "
986 "base_name='%s%s%s') and open_persistent_id %"PRIu64" "
987 "==> do not cleanup\n",
988 file_id_string(frame, &fid),
991 (data->stream_name == NULL)
992 ? "" : "', stream_name='",
993 (data->stream_name == NULL)
994 ? "" : data->stream_name,
999 DBG_DEBUG("cleaning up %u entries for file "
1000 "(file-id='%s', servicepath='%s', "
1001 "base_name='%s%s%s') "
1002 "from open_persistent_id %"PRIu64"\n",
1003 data->num_share_modes,
1004 file_id_string(frame, &fid),
1007 (data->stream_name == NULL)
1008 ? "" : "', stream_name='",
1009 (data->stream_name == NULL)
1010 ? "" : data->stream_name,
1011 open_persistent_id);
1013 data->num_share_modes = 0;
1014 data->modified = true;