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Diffstat (limited to 'fs/dlm/lockspace.c')
-rw-r--r--fs/dlm/lockspace.c212
1 files changed, 63 insertions, 149 deletions
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 0455dddb07..475ab4370d 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -29,8 +29,6 @@ static int ls_count;
static struct mutex ls_lock;
static struct list_head lslist;
static spinlock_t lslist_lock;
-static struct task_struct * scand_task;
-
static ssize_t dlm_control_store(struct dlm_ls *ls, const char *buf, size_t len)
{
@@ -247,66 +245,11 @@ void dlm_lockspace_exit(void)
kset_unregister(dlm_kset);
}
-static struct dlm_ls *find_ls_to_scan(void)
-{
- struct dlm_ls *ls;
-
- spin_lock(&lslist_lock);
- list_for_each_entry(ls, &lslist, ls_list) {
- if (time_after_eq(jiffies, ls->ls_scan_time +
- dlm_config.ci_scan_secs * HZ)) {
- spin_unlock(&lslist_lock);
- return ls;
- }
- }
- spin_unlock(&lslist_lock);
- return NULL;
-}
-
-static int dlm_scand(void *data)
-{
- struct dlm_ls *ls;
-
- while (!kthread_should_stop()) {
- ls = find_ls_to_scan();
- if (ls) {
- if (dlm_lock_recovery_try(ls)) {
- ls->ls_scan_time = jiffies;
- dlm_scan_rsbs(ls);
- dlm_unlock_recovery(ls);
- } else {
- ls->ls_scan_time += HZ;
- }
- continue;
- }
- schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ);
- }
- return 0;
-}
-
-static int dlm_scand_start(void)
-{
- struct task_struct *p;
- int error = 0;
-
- p = kthread_run(dlm_scand, NULL, "dlm_scand");
- if (IS_ERR(p))
- error = PTR_ERR(p);
- else
- scand_task = p;
- return error;
-}
-
-static void dlm_scand_stop(void)
-{
- kthread_stop(scand_task);
-}
-
struct dlm_ls *dlm_find_lockspace_global(uint32_t id)
{
struct dlm_ls *ls;
- spin_lock(&lslist_lock);
+ spin_lock_bh(&lslist_lock);
list_for_each_entry(ls, &lslist, ls_list) {
if (ls->ls_global_id == id) {
@@ -316,7 +259,7 @@ struct dlm_ls *dlm_find_lockspace_global(uint32_t id)
}
ls = NULL;
out:
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
return ls;
}
@@ -324,7 +267,7 @@ struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace)
{
struct dlm_ls *ls;
- spin_lock(&lslist_lock);
+ spin_lock_bh(&lslist_lock);
list_for_each_entry(ls, &lslist, ls_list) {
if (ls->ls_local_handle == lockspace) {
atomic_inc(&ls->ls_count);
@@ -333,7 +276,7 @@ struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace)
}
ls = NULL;
out:
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
return ls;
}
@@ -341,7 +284,7 @@ struct dlm_ls *dlm_find_lockspace_device(int minor)
{
struct dlm_ls *ls;
- spin_lock(&lslist_lock);
+ spin_lock_bh(&lslist_lock);
list_for_each_entry(ls, &lslist, ls_list) {
if (ls->ls_device.minor == minor) {
atomic_inc(&ls->ls_count);
@@ -350,7 +293,7 @@ struct dlm_ls *dlm_find_lockspace_device(int minor)
}
ls = NULL;
out:
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
return ls;
}
@@ -365,15 +308,15 @@ static void remove_lockspace(struct dlm_ls *ls)
retry:
wait_event(ls->ls_count_wait, atomic_read(&ls->ls_count) == 0);
- spin_lock(&lslist_lock);
+ spin_lock_bh(&lslist_lock);
if (atomic_read(&ls->ls_count) != 0) {
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
goto retry;
}
WARN_ON(ls->ls_create_count != 0);
list_del(&ls->ls_list);
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
}
static int threads_start(void)
@@ -382,22 +325,9 @@ static int threads_start(void)
/* Thread for sending/receiving messages for all lockspace's */
error = dlm_midcomms_start();
- if (error) {
+ if (error)
log_print("cannot start dlm midcomms %d", error);
- goto fail;
- }
-
- error = dlm_scand_start();
- if (error) {
- log_print("cannot start dlm_scand thread %d", error);
- goto midcomms_fail;
- }
-
- return 0;
- midcomms_fail:
- dlm_midcomms_stop();
- fail:
return error;
}
@@ -407,9 +337,9 @@ static int new_lockspace(const char *name, const char *cluster,
int *ops_result, dlm_lockspace_t **lockspace)
{
struct dlm_ls *ls;
- int i, size, error;
int do_unreg = 0;
int namelen = strlen(name);
+ int error;
if (namelen > DLM_LOCKSPACE_LEN || namelen == 0)
return -EINVAL;
@@ -448,7 +378,7 @@ static int new_lockspace(const char *name, const char *cluster,
error = 0;
- spin_lock(&lslist_lock);
+ spin_lock_bh(&lslist_lock);
list_for_each_entry(ls, &lslist, ls_list) {
WARN_ON(ls->ls_create_count <= 0);
if (ls->ls_namelen != namelen)
@@ -464,7 +394,7 @@ static int new_lockspace(const char *name, const char *cluster,
error = 1;
break;
}
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
if (error)
goto out;
@@ -492,32 +422,21 @@ static int new_lockspace(const char *name, const char *cluster,
*/
ls->ls_exflags = (flags & ~(DLM_LSFL_FS | DLM_LSFL_NEWEXCL));
- size = READ_ONCE(dlm_config.ci_rsbtbl_size);
- ls->ls_rsbtbl_size = size;
+ INIT_LIST_HEAD(&ls->ls_toss);
+ INIT_LIST_HEAD(&ls->ls_keep);
+ rwlock_init(&ls->ls_rsbtbl_lock);
- ls->ls_rsbtbl = vmalloc(array_size(size, sizeof(struct dlm_rsbtable)));
- if (!ls->ls_rsbtbl)
+ error = rhashtable_init(&ls->ls_rsbtbl, &dlm_rhash_rsb_params);
+ if (error)
goto out_lsfree;
- for (i = 0; i < size; i++) {
- ls->ls_rsbtbl[i].keep.rb_node = NULL;
- ls->ls_rsbtbl[i].toss.rb_node = NULL;
- spin_lock_init(&ls->ls_rsbtbl[i].lock);
- }
-
- for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) {
- ls->ls_remove_names[i] = kzalloc(DLM_RESNAME_MAXLEN+1,
- GFP_KERNEL);
- if (!ls->ls_remove_names[i])
- goto out_rsbtbl;
- }
idr_init(&ls->ls_lkbidr);
- spin_lock_init(&ls->ls_lkbidr_spin);
+ rwlock_init(&ls->ls_lkbidr_lock);
INIT_LIST_HEAD(&ls->ls_waiters);
- mutex_init(&ls->ls_waiters_mutex);
+ spin_lock_init(&ls->ls_waiters_lock);
INIT_LIST_HEAD(&ls->ls_orphans);
- mutex_init(&ls->ls_orphans_mutex);
+ spin_lock_init(&ls->ls_orphans_lock);
INIT_LIST_HEAD(&ls->ls_new_rsb);
spin_lock_init(&ls->ls_new_rsb_spin);
@@ -552,11 +471,9 @@ static int new_lockspace(const char *name, const char *cluster,
ls->ls_recover_seq = get_random_u64();
ls->ls_recover_args = NULL;
init_rwsem(&ls->ls_in_recovery);
- init_rwsem(&ls->ls_recv_active);
+ rwlock_init(&ls->ls_recv_active);
INIT_LIST_HEAD(&ls->ls_requestqueue);
- atomic_set(&ls->ls_requestqueue_cnt, 0);
- init_waitqueue_head(&ls->ls_requestqueue_wait);
- mutex_init(&ls->ls_requestqueue_mutex);
+ rwlock_init(&ls->ls_requestqueue_lock);
spin_lock_init(&ls->ls_clear_proc_locks);
/* Due backwards compatibility with 3.1 we need to use maximum
@@ -565,8 +482,10 @@ static int new_lockspace(const char *name, const char *cluster,
* might send less.
*/
ls->ls_recover_buf = kmalloc(DLM_MAX_SOCKET_BUFSIZE, GFP_NOFS);
- if (!ls->ls_recover_buf)
+ if (!ls->ls_recover_buf) {
+ error = -ENOMEM;
goto out_lkbidr;
+ }
ls->ls_slot = 0;
ls->ls_num_slots = 0;
@@ -580,13 +499,20 @@ static int new_lockspace(const char *name, const char *cluster,
ls->ls_recover_list_count = 0;
ls->ls_local_handle = ls;
init_waitqueue_head(&ls->ls_wait_general);
- INIT_LIST_HEAD(&ls->ls_root_list);
- init_rwsem(&ls->ls_root_sem);
+ INIT_LIST_HEAD(&ls->ls_masters_list);
+ rwlock_init(&ls->ls_masters_lock);
+ INIT_LIST_HEAD(&ls->ls_dir_dump_list);
+ rwlock_init(&ls->ls_dir_dump_lock);
+
+ INIT_LIST_HEAD(&ls->ls_toss_q);
+ spin_lock_init(&ls->ls_toss_q_lock);
+ timer_setup(&ls->ls_timer, dlm_rsb_toss_timer,
+ TIMER_DEFERRABLE);
- spin_lock(&lslist_lock);
+ spin_lock_bh(&lslist_lock);
ls->ls_create_count = 1;
list_add(&ls->ls_list, &lslist);
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
if (flags & DLM_LSFL_FS) {
error = dlm_callback_start(ls);
@@ -655,17 +581,14 @@ static int new_lockspace(const char *name, const char *cluster,
out_callback:
dlm_callback_stop(ls);
out_delist:
- spin_lock(&lslist_lock);
+ spin_lock_bh(&lslist_lock);
list_del(&ls->ls_list);
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
idr_destroy(&ls->ls_recover_idr);
kfree(ls->ls_recover_buf);
out_lkbidr:
idr_destroy(&ls->ls_lkbidr);
- out_rsbtbl:
- for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++)
- kfree(ls->ls_remove_names[i]);
- vfree(ls->ls_rsbtbl);
+ rhashtable_destroy(&ls->ls_rsbtbl);
out_lsfree:
if (do_unreg)
kobject_put(&ls->ls_kobj);
@@ -697,7 +620,6 @@ static int __dlm_new_lockspace(const char *name, const char *cluster,
if (error > 0)
error = 0;
if (!ls_count) {
- dlm_scand_stop();
dlm_midcomms_shutdown();
dlm_midcomms_stop();
}
@@ -756,7 +678,7 @@ static int lockspace_busy(struct dlm_ls *ls, int force)
{
int rv;
- spin_lock(&ls->ls_lkbidr_spin);
+ read_lock_bh(&ls->ls_lkbidr_lock);
if (force == 0) {
rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls);
} else if (force == 1) {
@@ -764,19 +686,25 @@ static int lockspace_busy(struct dlm_ls *ls, int force)
} else {
rv = 0;
}
- spin_unlock(&ls->ls_lkbidr_spin);
+ read_unlock_bh(&ls->ls_lkbidr_lock);
return rv;
}
+static void rhash_free_rsb(void *ptr, void *arg)
+{
+ struct dlm_rsb *rsb = ptr;
+
+ dlm_free_rsb(rsb);
+}
+
static int release_lockspace(struct dlm_ls *ls, int force)
{
struct dlm_rsb *rsb;
- struct rb_node *n;
- int i, busy, rv;
+ int busy, rv;
busy = lockspace_busy(ls, force);
- spin_lock(&lslist_lock);
+ spin_lock_bh(&lslist_lock);
if (ls->ls_create_count == 1) {
if (busy) {
rv = -EBUSY;
@@ -790,7 +718,7 @@ static int release_lockspace(struct dlm_ls *ls, int force)
} else {
rv = -EINVAL;
}
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
if (rv) {
log_debug(ls, "release_lockspace no remove %d", rv);
@@ -807,8 +735,13 @@ static int release_lockspace(struct dlm_ls *ls, int force)
dlm_recoverd_stop(ls);
+ /* clear the LSFL_RUNNING flag to fast up
+ * time_shutdown_sync(), we don't care anymore
+ */
+ clear_bit(LSFL_RUNNING, &ls->ls_flags);
+ timer_shutdown_sync(&ls->ls_timer);
+
if (ls_count == 1) {
- dlm_scand_stop();
dlm_clear_members(ls);
dlm_midcomms_shutdown();
}
@@ -830,27 +763,9 @@ static int release_lockspace(struct dlm_ls *ls, int force)
idr_destroy(&ls->ls_lkbidr);
/*
- * Free all rsb's on rsbtbl[] lists
+ * Free all rsb's on rsbtbl
*/
-
- for (i = 0; i < ls->ls_rsbtbl_size; i++) {
- while ((n = rb_first(&ls->ls_rsbtbl[i].keep))) {
- rsb = rb_entry(n, struct dlm_rsb, res_hashnode);
- rb_erase(n, &ls->ls_rsbtbl[i].keep);
- dlm_free_rsb(rsb);
- }
-
- while ((n = rb_first(&ls->ls_rsbtbl[i].toss))) {
- rsb = rb_entry(n, struct dlm_rsb, res_hashnode);
- rb_erase(n, &ls->ls_rsbtbl[i].toss);
- dlm_free_rsb(rsb);
- }
- }
-
- vfree(ls->ls_rsbtbl);
-
- for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++)
- kfree(ls->ls_remove_names[i]);
+ rhashtable_free_and_destroy(&ls->ls_rsbtbl, rhash_free_rsb, NULL);
while (!list_empty(&ls->ls_new_rsb)) {
rsb = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb,
@@ -918,20 +833,19 @@ void dlm_stop_lockspaces(void)
restart:
count = 0;
- spin_lock(&lslist_lock);
+ spin_lock_bh(&lslist_lock);
list_for_each_entry(ls, &lslist, ls_list) {
if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) {
count++;
continue;
}
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
log_error(ls, "no userland control daemon, stopping lockspace");
dlm_ls_stop(ls);
goto restart;
}
- spin_unlock(&lslist_lock);
+ spin_unlock_bh(&lslist_lock);
if (count)
log_print("dlm user daemon left %d lockspaces", count);
}
-