#include "lib/util/dlinklist.h"
#include "lib/util/debug.h"
#include "lib/util/samba_util.h"
+#include "lib/util/sys_rw.h"
#include "ctdb_private.h"
-#include "ctdb_logging.h"
-#include "common/system.h"
#include "common/common.h"
+#include "common/logging.h"
/*
* Non-blocking Locking API
*
* ctdb_lock_record() - get a lock on a record
* ctdb_lock_db() - get a lock on a DB
- * ctdb_lock_alldb_prio() - get a lock on all DBs with given priority
- * ctdb_lock_alldb() - get a lock on all DBs
*
* auto_mark - whether to mark/unmark DBs in before/after callback
* = false is used for freezing databases for
enum lock_type {
LOCK_RECORD,
LOCK_DB,
- LOCK_ALLDB_PRIO,
- LOCK_ALLDB,
};
static const char * const lock_type_str[] = {
"lock_record",
"lock_db",
- "lock_alldb_prio",
- "lock_alldb",
};
struct lock_request;
};
-/*
- * Support samba 3.6.x (and older) versions which do not set db priority.
- *
- * By default, all databases are set to priority 1. So only when priority
- * is set to 1, check for databases that need higher priority.
- */
-static bool later_db(struct ctdb_context *ctdb, const char *name)
-{
- if (ctdb->tunable.samba3_hack == 0) {
- return false;
- }
-
- if (strstr(name, "brlock") ||
- strstr(name, "g_lock") ||
- strstr(name, "notify_onelevel") ||
- strstr(name, "serverid") ||
- strstr(name, "xattr_tdb")) {
- return true;
- }
-
- return false;
-}
-
-int ctdb_db_prio_iterator(struct ctdb_context *ctdb, uint32_t priority,
- ctdb_db_handler_t handler, void *private_data)
-{
- struct ctdb_db_context *ctdb_db;
- int ret;
-
- for (ctdb_db = ctdb->db_list; ctdb_db; ctdb_db = ctdb_db->next) {
- if (ctdb_db->priority != priority) {
- continue;
- }
- if (later_db(ctdb, ctdb_db->db_name)) {
- continue;
- }
- ret = handler(ctdb_db, private_data);
- if (ret != 0) {
- return -1;
- }
- }
-
- /* If priority != 1, later_db check is not required and can return */
- if (priority != 1) {
- return 0;
- }
-
- for (ctdb_db = ctdb->db_list; ctdb_db; ctdb_db = ctdb_db->next) {
- if (!later_db(ctdb, ctdb_db->db_name)) {
- continue;
- }
- ret = handler(ctdb_db, private_data);
- if (ret != 0) {
- return -1;
- }
- }
-
- return 0;
-}
-
int ctdb_db_iterator(struct ctdb_context *ctdb, ctdb_db_handler_t handler,
void *private_data)
{
return db_lock_mark_handler(ctdb_db, NULL);
}
-int ctdb_lockall_mark_prio(struct ctdb_context *ctdb, uint32_t priority)
-{
- /*
- * This function is only used by the main dameon during recovery.
- * At this stage, the databases have already been locked, by a
- * dedicated child process.
- */
-
- if (!ctdb_db_prio_frozen(ctdb, priority)) {
- DEBUG(DEBUG_ERR, ("Attempt to mark all databases locked when not frozen\n"));
- return -1;
- }
-
- return ctdb_db_prio_iterator(ctdb, priority, db_lock_mark_handler, NULL);
-}
-
-static int ctdb_lockall_mark(struct ctdb_context *ctdb)
-{
- uint32_t priority;
-
- for (priority=1; priority<=NUM_DB_PRIORITIES; priority++) {
- int ret;
-
- ret = ctdb_db_prio_iterator(ctdb, priority,
- db_lock_mark_handler, NULL);
- if (ret != 0) {
- return -1;
- }
- }
-
- return 0;
-}
-
-
/*
* lock all databases - unmark only
*/
return db_lock_unmark_handler(ctdb_db, NULL);
}
-int ctdb_lockall_unmark_prio(struct ctdb_context *ctdb, uint32_t priority)
-{
- /*
- * This function is only used by the main daemon during recovery.
- * At this stage, the databases have already been locked, by a
- * dedicated child process.
- */
-
- if (!ctdb_db_prio_frozen(ctdb, priority)) {
- DEBUG(DEBUG_ERR, ("Attempt to unmark all databases locked when not frozen\n"));
- return -1;
- }
-
- return ctdb_db_prio_iterator(ctdb, priority, db_lock_unmark_handler,
- NULL);
-}
-
-static int ctdb_lockall_unmark(struct ctdb_context *ctdb)
-{
- uint32_t priority;
-
- for (priority=NUM_DB_PRIORITIES; priority>0; priority--) {
- int ret;
-
- ret = ctdb_db_prio_iterator(ctdb, priority,
- db_lock_unmark_handler, NULL);
- if (ret != 0) {
- return -1;
- }
- }
-
- return 0;
-}
-
-
static void ctdb_lock_schedule(struct ctdb_context *ctdb);
/*
lock_ctx->request->lctx = NULL;
}
if (lock_ctx->child > 0) {
- ctdb_kill(lock_ctx->ctdb, lock_ctx->child, SIGKILL);
+ ctdb_kill(lock_ctx->ctdb, lock_ctx->child, SIGTERM);
if (lock_ctx->type == LOCK_RECORD) {
DLIST_REMOVE(lock_ctx->ctdb_db->lock_current, lock_ctx);
} else {
DLIST_REMOVE(lock_ctx->ctdb->lock_current, lock_ctx);
}
- if (lock_ctx->ctdb_db) {
- lock_ctx->ctdb_db->lock_num_current--;
- }
+ lock_ctx->ctdb_db->lock_num_current--;
CTDB_DECREMENT_STAT(lock_ctx->ctdb, locks.num_current);
- if (lock_ctx->ctdb_db) {
- CTDB_DECREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_current);
- }
+ CTDB_DECREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_current);
} else {
if (lock_ctx->type == LOCK_RECORD) {
DLIST_REMOVE(lock_ctx->ctdb_db->lock_pending, lock_ctx);
DLIST_REMOVE(lock_ctx->ctdb->lock_pending, lock_ctx);
}
CTDB_DECREMENT_STAT(lock_ctx->ctdb, locks.num_pending);
- if (lock_ctx->ctdb_db) {
- CTDB_DECREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_pending);
- }
+ CTDB_DECREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_pending);
}
ctdb_lock_schedule(lock_ctx->ctdb);
break;
case LOCK_DB:
- ctdb_lockdb_mark(lock_ctx->ctdb_db);
- break;
-
- case LOCK_ALLDB_PRIO:
- ctdb_lockall_mark_prio(lock_ctx->ctdb, lock_ctx->priority);
- break;
-
- case LOCK_ALLDB:
- ctdb_lockall_mark(lock_ctx->ctdb);
+ (void)ctdb_lockdb_mark(lock_ctx->ctdb_db);
break;
}
}
case LOCK_DB:
ctdb_lockdb_unmark(lock_ctx->ctdb_db);
break;
-
- case LOCK_ALLDB_PRIO:
- ctdb_lockall_unmark_prio(lock_ctx->ctdb, lock_ctx->priority);
- break;
-
- case LOCK_ALLDB:
- ctdb_lockall_unmark(lock_ctx->ctdb);
- break;
}
}
/* Update statistics */
CTDB_INCREMENT_STAT(lock_ctx->ctdb, locks.num_calls);
- if (lock_ctx->ctdb_db) {
- CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_calls);
- }
+ CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_calls);
if (locked) {
- if (lock_ctx->ctdb_db) {
- CTDB_INCREMENT_STAT(lock_ctx->ctdb, locks.buckets[id]);
- CTDB_UPDATE_LATENCY(lock_ctx->ctdb, lock_ctx->ctdb_db,
- lock_type_str[lock_ctx->type], locks.latency,
- lock_ctx->start_time);
-
- CTDB_UPDATE_DB_LATENCY(lock_ctx->ctdb_db, lock_type_str[lock_ctx->type], locks.latency, t);
- CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.buckets[id]);
- }
+ CTDB_INCREMENT_STAT(lock_ctx->ctdb, locks.buckets[id]);
+ CTDB_UPDATE_LATENCY(lock_ctx->ctdb, lock_ctx->ctdb_db,
+ lock_type_str[lock_ctx->type], locks.latency,
+ lock_ctx->start_time);
+
+ CTDB_UPDATE_DB_LATENCY(lock_ctx->ctdb_db, lock_type_str[lock_ctx->type], locks.latency, t);
+ CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.buckets[id]);
} else {
CTDB_INCREMENT_STAT(lock_ctx->ctdb, locks.num_failed);
- if (lock_ctx->ctdb_db) {
- CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_failed);
- }
+ CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_failed);
}
process_callbacks(lock_ctx, locked);
}
+struct lock_log_entry {
+ struct db_hash_context *lock_log;
+ TDB_DATA key;
+ unsigned long log_sec;
+ struct tevent_timer *timer;
+};
+
+static int lock_log_fetch_parser(uint8_t *keybuf, size_t keylen,
+ uint8_t *databuf, size_t datalen,
+ void *private_data)
+{
+ struct lock_log_entry **entry =
+ (struct lock_log_entry **)private_data;
+
+ if (datalen != sizeof(struct lock_log_entry *)) {
+ return EINVAL;
+ }
+
+ *entry = talloc_get_type_abort(*(void **)databuf,
+ struct lock_log_entry);
+ return 0;
+}
+
+static void lock_log_cleanup(struct tevent_context *ev,
+ struct tevent_timer *ttimer,
+ struct timeval current_time,
+ void *private_data)
+{
+ struct lock_log_entry *entry = talloc_get_type_abort(
+ private_data, struct lock_log_entry);
+ int ret;
+
+ entry->timer = NULL;
+
+ ret = db_hash_delete(entry->lock_log, entry->key.dptr,
+ entry->key.dsize);
+ if (ret != 0) {
+ return;
+ }
+ talloc_free(entry);
+}
+
+static bool lock_log_skip(struct tevent_context *ev,
+ struct db_hash_context *lock_log,
+ TDB_DATA key, unsigned long elapsed_sec)
+{
+ struct lock_log_entry *entry = NULL;
+ int ret;
+
+ ret = db_hash_fetch(lock_log, key.dptr, key.dsize,
+ lock_log_fetch_parser, &entry);
+ if (ret == ENOENT) {
+
+ entry = talloc_zero(lock_log, struct lock_log_entry);
+ if (entry == NULL) {
+ goto fail;
+ }
+
+ entry->lock_log = lock_log;
+
+ entry->key.dptr = talloc_memdup(entry, key.dptr, key.dsize);
+ if (entry->key.dptr == NULL) {
+ talloc_free(entry);
+ goto fail;
+ }
+ entry->key.dsize = key.dsize;
+
+ entry->log_sec = elapsed_sec;
+ entry->timer = tevent_add_timer(ev, entry,
+ timeval_current_ofs(30, 0),
+ lock_log_cleanup, entry);
+ if (entry->timer == NULL) {
+ talloc_free(entry);
+ goto fail;
+ }
+
+ ret = db_hash_add(lock_log, key.dptr, key.dsize,
+ (uint8_t *)&entry,
+ sizeof(struct lock_log_entry *));
+ if (ret != 0) {
+ talloc_free(entry);
+ goto fail;
+ }
+
+ return false;
+
+ } else if (ret == EINVAL) {
+
+ ret = db_hash_delete(lock_log, key.dptr, key.dsize);
+ if (ret != 0) {
+ goto fail;
+ }
+
+ return false;
+
+ } else if (ret == 0) {
+
+ if (elapsed_sec <= entry->log_sec) {
+ return true;
+ }
+
+ entry->log_sec = elapsed_sec;
+
+ TALLOC_FREE(entry->timer);
+ entry->timer = tevent_add_timer(ev, entry,
+ timeval_current_ofs(30, 0),
+ lock_log_cleanup, entry);
+ if (entry->timer == NULL) {
+ ret = db_hash_delete(lock_log, key.dptr, key.dsize);
+ if (ret != 0) {
+ goto fail;
+ }
+ talloc_free(entry);
+ }
+
+ return false;
+ }
+
+
+fail:
+ return false;
+
+}
/*
* Callback routine when required locks are not obtained within timeout
struct ctdb_context *ctdb;
pid_t pid;
double elapsed_time;
- int new_timer;
+ bool skip;
+ char *keystr;
lock_ctx = talloc_get_type_abort(private_data, struct lock_context);
ctdb = lock_ctx->ctdb;
- /* If a node stopped/banned, don't spam the logs */
- if (ctdb->nodes[ctdb->pnn]->flags & NODE_FLAGS_INACTIVE) {
- lock_ctx->ttimer = NULL;
- return;
- }
-
elapsed_time = timeval_elapsed(&lock_ctx->start_time);
- if (lock_ctx->ctdb_db) {
+
+ /* For database locks, always log */
+ if (lock_ctx->type == LOCK_DB) {
DEBUG(DEBUG_WARNING,
- ("Unable to get %s lock on database %s for %.0lf seconds\n",
- (lock_ctx->type == LOCK_RECORD ? "RECORD" : "DB"),
+ ("Unable to get DB lock on database %s for "
+ "%.0lf seconds\n",
lock_ctx->ctdb_db->db_name, elapsed_time));
- } else {
- DEBUG(DEBUG_WARNING,
- ("Unable to get ALLDB locks for %.0lf seconds\n",
- elapsed_time));
+ goto lock_debug;
+ }
+
+ /* For record locks, check if we have already logged */
+ skip = lock_log_skip(ev, lock_ctx->ctdb_db->lock_log,
+ lock_ctx->key, (unsigned long)elapsed_time);
+ if (skip) {
+ goto skip_lock_debug;
+ }
+
+ keystr = hex_encode_talloc(lock_ctx, lock_ctx->key.dptr,
+ lock_ctx->key.dsize);
+ DEBUG(DEBUG_WARNING,
+ ("Unable to get RECORD lock on database %s for %.0lf seconds"
+ " (key %s)\n",
+ lock_ctx->ctdb_db->db_name, elapsed_time,
+ keystr ? keystr : ""));
+ TALLOC_FREE(keystr);
+
+ /* If a node stopped/banned, don't spam the logs */
+ if (ctdb->nodes[ctdb->pnn]->flags & NODE_FLAGS_INACTIVE) {
+ goto skip_lock_debug;
}
+lock_debug:
+
if (ctdb_set_helper("lock debugging helper",
debug_locks, sizeof(debug_locks),
"CTDB_DEBUG_LOCKS",
" Unable to setup lock debugging\n"));
}
- /* Back-off logging if lock is not obtained for a long time */
- if (elapsed_time < 100.0) {
- new_timer = 10;
- } else if (elapsed_time < 1000.0) {
- new_timer = 100;
- } else {
- new_timer = 1000;
- }
+skip_lock_debug:
/* reset the timeout timer */
// talloc_free(lock_ctx->ttimer);
lock_ctx->ttimer = tevent_add_timer(ctdb->ev,
lock_ctx,
- timeval_current_ofs(new_timer, 0),
+ timeval_current_ofs(10, 0),
ctdb_lock_timeout_handler,
(void *)lock_ctx);
}
-
-static int db_count_handler(struct ctdb_db_context *ctdb_db, void *private_data)
-{
- int *count = (int *)private_data;
-
- (*count) += 2;
-
- return 0;
-}
-
-static int db_flags(struct ctdb_db_context *ctdb_db)
-{
- int tdb_flags = TDB_DEFAULT;
-
-#ifdef TDB_MUTEX_LOCKING
- if (!ctdb_db->persistent && ctdb_db->ctdb->tunable.mutex_enabled) {
- tdb_flags = (TDB_MUTEX_LOCKING | TDB_CLEAR_IF_FIRST);
- }
-#endif
- return tdb_flags;
-}
-
-struct db_namelist {
- const char **names;
- int n;
-};
-
-static int db_name_handler(struct ctdb_db_context *ctdb_db, void *private_data)
-{
- struct db_namelist *list = (struct db_namelist *)private_data;
-
- list->names[list->n] = talloc_strdup(list->names, ctdb_db->db_path);
- list->names[list->n+1] = talloc_asprintf(list->names, "0x%x",
- db_flags(ctdb_db));
- list->n += 2;
-
- return 0;
-}
-
static bool lock_helper_args(TALLOC_CTX *mem_ctx,
struct lock_context *lock_ctx, int fd,
int *argc, const char ***argv)
{
- struct ctdb_context *ctdb = lock_ctx->ctdb;
const char **args = NULL;
- int nargs, i;
- int priority;
- struct db_namelist list;
+ int nargs = 0, i;
switch (lock_ctx->type) {
case LOCK_RECORD:
case LOCK_DB:
nargs = 5;
break;
-
- case LOCK_ALLDB_PRIO:
- nargs = 3;
- ctdb_db_prio_iterator(ctdb, lock_ctx->priority,
- db_count_handler, &nargs);
- break;
-
- case LOCK_ALLDB:
- nargs = 3;
- for (priority=1; priority<NUM_DB_PRIORITIES; priority++) {
- ctdb_db_prio_iterator(ctdb, priority,
- db_count_handler, &nargs);
- }
- break;
}
/* Add extra argument for null termination */
args[2] = talloc_strdup(args, "RECORD");
args[3] = talloc_strdup(args, lock_ctx->ctdb_db->db_path);
args[4] = talloc_asprintf(args, "0x%x",
- db_flags(lock_ctx->ctdb_db));
+ tdb_get_flags(lock_ctx->ctdb_db->ltdb->tdb));
if (lock_ctx->key.dsize == 0) {
args[5] = talloc_strdup(args, "NULL");
} else {
args[2] = talloc_strdup(args, "DB");
args[3] = talloc_strdup(args, lock_ctx->ctdb_db->db_path);
args[4] = talloc_asprintf(args, "0x%x",
- db_flags(lock_ctx->ctdb_db));
- break;
-
- case LOCK_ALLDB_PRIO:
- args[2] = talloc_strdup(args, "DB");
- list.names = args;
- list.n = 3;
- ctdb_db_prio_iterator(ctdb, lock_ctx->priority,
- db_name_handler, &list);
- break;
-
- case LOCK_ALLDB:
- args[2] = talloc_strdup(args, "DB");
- list.names = args;
- list.n = 3;
- for (priority=1; priority<NUM_DB_PRIORITIES; priority++) {
- ctdb_db_prio_iterator(ctdb, priority,
- db_name_handler, &list);
- }
+ tdb_get_flags(lock_ctx->ctdb_db->ltdb->tdb));
break;
}
"request\n"));
DLIST_REMOVE(ctdb->lock_pending, lock_ctx);
CTDB_DECREMENT_STAT(ctdb, locks.num_pending);
- if (lock_ctx->ctdb_db) {
- CTDB_DECREMENT_DB_STAT(lock_ctx->ctdb_db,
- locks.num_pending);
- }
+ CTDB_DECREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_pending);
talloc_free(lock_ctx);
}
return;
}
+ if (! ctdb->do_setsched) {
+ ret = setenv("CTDB_NOSETSCHED", "1", 1);
+ if (ret != 0) {
+ DEBUG(DEBUG_WARNING,
+ ("Failed to set CTDB_NOSETSCHED variable\n"));
+ }
+ }
+
/* Create arguments for lock helper */
if (!lock_helper_args(tmp_ctx, lock_ctx, lock_ctx->fd[1],
&argc, &args)) {
return;
}
- if (!ctdb_vfork_with_logging(lock_ctx, ctdb, "lock_helper",
- prog, argc, (const char **)args,
- NULL, NULL, &lock_ctx->child)) {
+ lock_ctx->child = ctdb_vfork_exec(lock_ctx, ctdb, prog, argc,
+ (const char **)args);
+ if (lock_ctx->child == -1) {
DEBUG(DEBUG_ERR, ("Failed to create a child in ctdb_lock_schedule\n"));
close(lock_ctx->fd[0]);
close(lock_ctx->fd[1]);
ctdb_lock_timeout_handler,
(void *)lock_ctx);
if (lock_ctx->ttimer == NULL) {
- ctdb_kill(ctdb, lock_ctx->child, SIGKILL);
+ ctdb_kill(ctdb, lock_ctx->child, SIGTERM);
lock_ctx->child = -1;
close(lock_ctx->fd[0]);
return;
(void *)lock_ctx);
if (lock_ctx->tfd == NULL) {
TALLOC_FREE(lock_ctx->ttimer);
- ctdb_kill(ctdb, lock_ctx->child, SIGKILL);
+ ctdb_kill(ctdb, lock_ctx->child, SIGTERM);
lock_ctx->child = -1;
close(lock_ctx->fd[0]);
return;
/* Move the context from pending to current */
if (lock_ctx->type == LOCK_RECORD) {
DLIST_REMOVE(lock_ctx->ctdb_db->lock_pending, lock_ctx);
- DLIST_ADD_END(lock_ctx->ctdb_db->lock_current, lock_ctx, NULL);
+ DLIST_ADD_END(lock_ctx->ctdb_db->lock_current, lock_ctx);
} else {
DLIST_REMOVE(ctdb->lock_pending, lock_ctx);
- DLIST_ADD_END(ctdb->lock_current, lock_ctx, NULL);
+ DLIST_ADD_END(ctdb->lock_current, lock_ctx);
}
CTDB_DECREMENT_STAT(lock_ctx->ctdb, locks.num_pending);
CTDB_INCREMENT_STAT(lock_ctx->ctdb, locks.num_current);
- if (lock_ctx->ctdb_db) {
- lock_ctx->ctdb_db->lock_num_current++;
- CTDB_DECREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_pending);
- CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_current);
- }
+ lock_ctx->ctdb_db->lock_num_current++;
+ CTDB_DECREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_pending);
+ CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_current);
}
* immediately, so keep them at the head of the pending queue.
*/
if (lock_ctx->type == LOCK_RECORD) {
- DLIST_ADD_END(ctdb_db->lock_pending, lock_ctx, NULL);
+ DLIST_ADD_END(ctdb_db->lock_pending, lock_ctx);
} else {
- DLIST_ADD_END(ctdb->lock_pending, lock_ctx, NULL);
+ DLIST_ADD_END(ctdb->lock_pending, lock_ctx);
}
CTDB_INCREMENT_STAT(ctdb, locks.num_pending);
if (ctdb_db) {
LOCK_DB,
auto_mark);
}
-
-
-/*
- * obtain locks on all databases of specified priority
- */
-struct lock_request *ctdb_lock_alldb_prio(TALLOC_CTX *mem_ctx,
- struct ctdb_context *ctdb,
- uint32_t priority,
- bool auto_mark,
- void (*callback)(void *, bool),
- void *private_data)
-{
- if (priority < 1 || priority > NUM_DB_PRIORITIES) {
- DEBUG(DEBUG_ERR, ("Invalid db priority: %u\n", priority));
- return NULL;
- }
-
- return ctdb_lock_internal(mem_ctx,
- ctdb,
- NULL,
- tdb_null,
- priority,
- callback,
- private_data,
- LOCK_ALLDB_PRIO,
- auto_mark);
-}
-
-
-/*
- * obtain locks on all databases
- */
-struct lock_request *ctdb_lock_alldb(TALLOC_CTX *mem_ctx,
- struct ctdb_context *ctdb,
- bool auto_mark,
- void (*callback)(void *, bool),
- void *private_data)
-{
- return ctdb_lock_internal(mem_ctx,
- ctdb,
- NULL,
- tdb_null,
- 0,
- callback,
- private_data,
- LOCK_ALLDB,
- auto_mark);
-}
-
git.samba.org / samba.git / blobdiff