static void config_log_put(struct config_llog_data *cld)
{
ENTRY;
+
CDEBUG(D_INFO, "log %s refs %d\n", cld->cld_logname,
atomic_read(&cld->cld_refcount));
- if (atomic_dec_and_test(&cld->cld_refcount)) {
- CDEBUG(D_MGC, "dropping config log %s\n", cld->cld_logname);
- class_export_put(cld->cld_mgcexp);
- spin_lock(&config_list_lock);
+ LASSERT(atomic_read(&cld->cld_refcount) > 0);
+
+ /* spinlock to make sure no item with 0 refcount in the list */
+ spin_lock(&config_list_lock);
+ if (unlikely(atomic_dec_and_test(&cld->cld_refcount))) {
list_del(&cld->cld_list_chain);
spin_unlock(&config_list_lock);
+
+ CDEBUG(D_MGC, "dropping config log %s\n", cld->cld_logname);
+
+ if (cld->cld_sptlrpc)
+ config_log_put(cld->cld_sptlrpc);
+ if (cld->cld_is_sptlrpc)
+ sptlrpc_conf_log_stop(cld->cld_logname);
+
+ class_export_put(cld->cld_mgcexp);
OBD_FREE(cld->cld_logname, strlen(cld->cld_logname) + 1);
if (cld->cld_cfg.cfg_instance != NULL)
OBD_FREE(cld->cld_cfg.cfg_instance,
strlen(cld->cld_cfg.cfg_instance) + 1);
OBD_FREE(cld, sizeof(*cld));
+ } else {
+ spin_unlock(&config_list_lock);
}
+
EXIT;
}
/* Find a config log by name */
-static struct config_llog_data *config_log_find(char *logname,
- struct config_llog_instance *cfg)
+static
+struct config_llog_data *config_log_find(char *logname,
+ struct config_llog_instance *cfg)
{
- struct list_head *tmp;
struct config_llog_data *cld;
char *logid = logname;
int match_instance = 0;
}
spin_lock(&config_list_lock);
- list_for_each(tmp, &config_llog_list) {
- cld = list_entry(tmp, struct config_llog_data, cld_list_chain);
+ list_for_each_entry(cld, &config_llog_list, cld_list_chain) {
if (match_instance && cld->cld_cfg.cfg_instance &&
strcmp(logid, cld->cld_cfg.cfg_instance) == 0)
goto out_found;
out_found:
atomic_inc(&cld->cld_refcount);
spin_unlock(&config_list_lock);
+ LASSERT(cld->cld_stopping == 0 || cld->cld_is_sptlrpc == 0);
RETURN(cld);
}
-/* Add this log to our list of active logs.
- We have one active log per "mount" - client instance or servername.
- Each instance may be at a different point in the log. */
-static int config_log_add(char *logname, struct config_llog_instance *cfg,
- struct super_block *sb)
+static
+struct config_llog_data *do_config_log_add(struct obd_device *obd,
+ char *logname,
+ unsigned int is_sptlrpc,
+ struct config_llog_instance *cfg,
+ struct super_block *sb)
{
struct config_llog_data *cld;
- struct lustre_sb_info *lsi = s2lsi(sb);
- int rc;
+ int rc;
ENTRY;
- CDEBUG(D_MGC, "adding config log %s:%s\n", logname, cfg->cfg_instance);
+ CDEBUG(D_MGC, "do adding config log %s:%s\n", logname,
+ cfg ? cfg->cfg_instance : "NULL");
OBD_ALLOC(cld, sizeof(*cld));
if (!cld)
- RETURN(-ENOMEM);
+ RETURN(ERR_PTR(-ENOMEM));
OBD_ALLOC(cld->cld_logname, strlen(logname) + 1);
if (!cld->cld_logname) {
OBD_FREE(cld, sizeof(*cld));
- RETURN(-ENOMEM);
+ RETURN(ERR_PTR(-ENOMEM));
}
strcpy(cld->cld_logname, logname);
- cld->cld_cfg = *cfg;
+ if (cfg)
+ cld->cld_cfg = *cfg;
cld->cld_cfg.cfg_last_idx = 0;
cld->cld_cfg.cfg_flags = 0;
cld->cld_cfg.cfg_sb = sb;
+ cld->cld_is_sptlrpc = is_sptlrpc;
atomic_set(&cld->cld_refcount, 1);
/* Keep the mgc around until we are done */
- cld->cld_mgcexp = class_export_get(lsi->lsi_mgc->obd_self_export);
+ cld->cld_mgcexp = class_export_get(obd->obd_self_export);
- if (cfg->cfg_instance != NULL) {
+ if (cfg && cfg->cfg_instance != NULL) {
OBD_ALLOC(cld->cld_cfg.cfg_instance,
strlen(cfg->cfg_instance) + 1);
strcpy(cld->cld_cfg.cfg_instance, cfg->cfg_instance);
}
+
+ if (is_sptlrpc) {
+ sptlrpc_conf_log_start(logname);
+ cld->cld_cfg.cfg_obdname = obd->obd_name;
+ }
+
rc = mgc_logname2resid(logname, &cld->cld_resid);
+
spin_lock(&config_list_lock);
list_add(&cld->cld_list_chain, &config_llog_list);
spin_unlock(&config_list_lock);
if (rc) {
config_log_put(cld);
- RETURN(rc);
+ RETURN(ERR_PTR(rc));
}
- RETURN(rc);
+ if (is_sptlrpc) {
+ rc = mgc_process_log(obd, cld);
+ if (rc)
+ CERROR("failed processing sptlrpc log: %d\n", rc);
+ }
+
+ RETURN(cld);
+}
+
+/**
+ * Add this log to our list of active logs.
+ * We have one active log per "mount" - client instance or servername.
+ * Each instance may be at a different point in the log.
+ */
+static int config_log_add(struct obd_device *obd, char *logname,
+ struct config_llog_instance *cfg,
+ struct super_block *sb)
+{
+ struct config_llog_data *cld, *sptlrpc_cld;
+ char seclogname[20];
+ char *ptr;
+ ENTRY;
+
+ CDEBUG(D_MGC, "adding config log %s:%s\n", logname, cfg->cfg_instance);
+
+ /*
+ * for each regular log, the depended sptlrpc log name is
+ * <fsname>-sptlrpc. multiple regular logs may share one sptlrpc log.
+ */
+ ptr = strrchr(logname, '-');
+ if (ptr == NULL || ptr - logname > 8) {
+ CERROR("logname %s is too long\n", logname);
+ RETURN(-EINVAL);
+ }
+
+ memcpy(seclogname, logname, ptr - logname);
+ strcpy(seclogname + (ptr - logname), "-sptlrpc");
+
+ sptlrpc_cld = config_log_find(seclogname, NULL);
+ if (IS_ERR(sptlrpc_cld)) {
+ sptlrpc_cld = do_config_log_add(obd, seclogname, 1, NULL, NULL);
+ if (IS_ERR(sptlrpc_cld)) {
+ CERROR("can't create sptlrpc log: %s\n", seclogname);
+ RETURN(PTR_ERR(sptlrpc_cld));
+ }
+ }
+
+ cld = do_config_log_add(obd, logname, 0, cfg, sb);
+ if (IS_ERR(cld)) {
+ CERROR("can't create log: %s\n", logname);
+ config_log_put(sptlrpc_cld);
+ RETURN(PTR_ERR(cld));
+ }
+
+ cld->cld_sptlrpc = sptlrpc_cld;
+
+ RETURN(0);
}
DECLARE_MUTEX(llog_process_lock);
/* Stop watching for updates on this log. */
static int config_log_end(char *logname, struct config_llog_instance *cfg)
{
- struct config_llog_data *cld;
+ struct config_llog_data *cld, *cld_sptlrpc;
int rc = 0;
ENTRY;
cld->cld_stopping = 1;
up(&llog_process_lock);
+ spin_lock(&config_list_lock);
+ cld_sptlrpc = cld->cld_sptlrpc;
+ cld->cld_sptlrpc = NULL;
+ spin_unlock(&config_list_lock);
+
+ if (cld_sptlrpc)
+ config_log_put(cld_sptlrpc);
+
/* drop the start ref */
config_log_put(cld);
CDEBUG(D_MGC, "end config log %s (%d)\n", logname ? logname : "client",
static int rq_state = 0;
static cfs_waitq_t rq_waitq;
-static int mgc_process_log(struct obd_device *mgc,
- struct config_llog_data *cld);
static int mgc_requeue_add(struct config_llog_data *cld, int later);
+static void do_requeue(struct config_llog_data *cld)
+{
+ LASSERT(atomic_read(&cld->cld_refcount) > 0);
+
+ if (cld->cld_mgcexp->exp_obd->u.cli.cl_conn_count != 0) {
+ CDEBUG(D_MGC, "updating log %s\n", cld->cld_logname);
+ mgc_process_log(cld->cld_mgcexp->exp_obd, cld);
+ } else {
+ CDEBUG(D_MGC, "disconnecting, won't update log %s\n",
+ cld->cld_logname);
+ }
+
+ /* Whether we enqueued again or not in mgc_process_log, we're done
+ * with the ref from the old enqueue */
+ config_log_put(cld);
+}
+
static int mgc_requeue_thread(void *data)
{
struct l_wait_info lwi_now, lwi_later;
- struct config_llog_data *cld, *n;
+ struct config_llog_data *cld, *cld_next, *cld_prev;
char name[] = "ll_cfg_requeue";
int rc = 0;
ENTRY;
NULL, NULL);
l_wait_event(rq_waitq, rq_state & RQ_STOP, &lwi_now);
+ /*
+ * iterate & processing through the list. for each cld, process
+ * its depending sptlrpc cld firstly (if any) and then itself.
+ *
+ * it's guaranteed any item in the list must have
+ * reference > 0; and if cld_lostlock is set, at
+ * least one reference is taken by the previous enqueue.
+ *
+ * Note: releasing a cld might lead to itself and its depended
+ * sptlrpc cld be unlinked from the list. to safely iterate
+ * we need to take a reference on next cld before processing.
+ */
+ cld_prev = NULL;
+
spin_lock(&config_list_lock);
- list_for_each_entry_safe(cld, n, &config_llog_list,
+ list_for_each_entry_safe(cld, cld_next, &config_llog_list,
cld_list_chain) {
- spin_unlock(&config_list_lock);
+ if (cld->cld_list_chain.next != &config_llog_list)
+ atomic_inc(&cld_next->cld_refcount);
+
if (cld->cld_lostlock) {
- CDEBUG(D_MGC, "updating log %s\n",
- cld->cld_logname);
+ if (cld->cld_sptlrpc &&
+ cld->cld_sptlrpc->cld_lostlock) {
+ cld->cld_sptlrpc->cld_lostlock = 0;
+
+ spin_unlock(&config_list_lock);
+ do_requeue(cld->cld_sptlrpc);
+ spin_lock(&config_list_lock);
+ LASSERT(cld->cld_lostlock);
+ }
+
cld->cld_lostlock = 0;
- rc = mgc_process_log(cld->cld_mgcexp->exp_obd,
- cld);
- /* Whether we enqueued again or not in
- mgc_process_log, we're done with the ref
- from the old enqueue */
- config_log_put(cld);
+
+ spin_unlock(&config_list_lock);
+ do_requeue(cld);
+ spin_lock(&config_list_lock);
}
- spin_lock(&config_list_lock);
+
+
+ if (cld_prev) {
+ spin_unlock(&config_list_lock);
+ config_log_put(cld_prev);
+ spin_lock(&config_list_lock);
+ }
+
+ cld_prev = cld_next;
}
spin_unlock(&config_list_lock);
CDEBUG(D_INFO, "log %s: requeue (l=%d r=%d sp=%d st=%x)\n",
cld->cld_logname, later, atomic_read(&cld->cld_refcount),
cld->cld_stopping, rq_state);
+ LASSERT(atomic_read(&cld->cld_refcount) > 0);
/* Hold lock for rq_state */
spin_lock(&config_list_lock);
if (cld->cld_stopping || (rq_state & RQ_STOP)) {
+ cld->cld_lostlock = 0;
spin_unlock(&config_list_lock);
config_log_put(cld);
RETURN(0);
break;
}
/* Did we fail to get the lock? */
- if (lock->l_req_mode != lock->l_granted_mode) {
+ if (lock->l_req_mode != lock->l_granted_mode &&
+ !cld->cld_is_sptlrpc) {
CDEBUG(D_MGC, "log %s: original grant failed, will "
"requeue later\n", cld->cld_logname);
/* Try to re-enqueue later */
/* Get a config log from the MGS and process it.
This func is called for both clients and servers. */
-static int mgc_process_log(struct obd_device *mgc,
- struct config_llog_data *cld)
+int mgc_process_log(struct obd_device *mgc,
+ struct config_llog_data *cld)
{
struct llog_ctxt *ctxt, *lctxt;
struct lustre_handle lockh;
struct client_obd *cli = &mgc->u.cli;
struct lvfs_run_ctxt saved;
- struct lustre_sb_info *lsi;
+ struct lustre_sb_info *lsi = NULL;
int rc = 0, rcl, flags = 0, must_pop = 0;
ENTRY;
- if (!cld || !cld->cld_cfg.cfg_sb) {
- /* This should never happen */
- CERROR("Missing cld, aborting log update\n");
- RETURN(-EINVAL);
- }
+ LASSERT(cld);
/* I don't want mutliple processes running process_log at once --
sounds like badness. It actually might be fine, as long as
OBD_FAIL_TIMEOUT(OBD_FAIL_MGC_PAUSE_PROCESS_LOG, 20);
- lsi = s2lsi(cld->cld_cfg.cfg_sb);
+ if (cld->cld_cfg.cfg_sb)
+ lsi = s2lsi(cld->cld_cfg.cfg_sb);
CDEBUG(D_MGC, "Process log %s:%s from %d\n", cld->cld_logname,
cld->cld_cfg.cfg_instance, cld->cld_cfg.cfg_last_idx + 1);
lctxt = llog_get_context(mgc, LLOG_CONFIG_ORIG_CTXT);
+ /*
+ * local copy of sptlrpc log is controlled elsewhere, don't try to
+ * read it up here.
+ */
+ if (rcl && cld->cld_is_sptlrpc)
+ goto out_pop;
+
/* Copy the setup log locally if we can. Don't mess around if we're
running an MGS though (logs are already local). */
if (lctxt && lsi && (lsi->lsi_flags & LSI_SERVER) &&
ctxt = lctxt;
}
+ if (cld->cld_is_sptlrpc)
+ sptlrpc_conf_log_update_begin(cld->cld_logname);
+
/* logname and instance info should be the same, so use our
copy of the instance for the update. The cfg_last_idx will
be updated here. */
if (must_pop)
pop_ctxt(&saved, &mgc->obd_lvfs_ctxt, NULL);
+ /*
+ * update settings on existing OBDs. doing it inside
+ * of llog_process_lock so no device is attaching/detaching
+ * in parallel.
+ * the logname must be <fsname>-sptlrpc
+ */
+ if (cld->cld_is_sptlrpc && rcl == 0) {
+ sptlrpc_conf_log_update_end(cld->cld_logname);
+ class_notify_sptlrpc_conf(cld->cld_logname,
+ strlen(cld->cld_logname) -
+ strlen("-sptlrpc"));
+ }
+
/* Now drop the lock so MGS can revoke it */
if (!rcl) {
rcl = mgc_cancel(mgc->u.cli.cl_mgc_mgsexp, NULL,
CERROR("lov_del_obd unimplemented\n");
rc = -ENOSYS;
break;
+ case LCFG_SPTLRPC_CONF: {
+ rc = sptlrpc_process_config(lcfg);
+ break;
+ }
case LCFG_LOG_START: {
struct config_llog_data *cld;
struct config_llog_instance *cfg;
cfg->cfg_last_idx);
/* We're only called through here on the initial mount */
- rc = config_log_add(logname, cfg, sb);
+ rc = config_log_add(obd, logname, cfg, sb);
if (rc)
break;
cld = config_log_find(logname, cfg);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff