cfs_mem_cache_t *ldlm_resource_slab, *ldlm_lock_slab;
-struct semaphore ldlm_namespace_lock;
-struct list_head ldlm_namespace_list = CFS_LIST_HEAD_INIT(ldlm_namespace_list);
+atomic_t ldlm_srv_namespace_nr = ATOMIC_INIT(0);
+atomic_t ldlm_cli_namespace_nr = ATOMIC_INIT(0);
+
+struct semaphore ldlm_srv_namespace_lock;
+struct list_head ldlm_srv_namespace_list =
+ CFS_LIST_HEAD_INIT(ldlm_srv_namespace_list);
+
+struct semaphore ldlm_cli_namespace_lock;
+struct list_head ldlm_cli_namespace_list =
+ CFS_LIST_HEAD_INIT(ldlm_cli_namespace_list);
+
cfs_proc_dir_entry_t *ldlm_type_proc_dir = NULL;
cfs_proc_dir_entry_t *ldlm_ns_proc_dir = NULL;
cfs_proc_dir_entry_t *ldlm_svc_proc_dir = NULL;
static int ldlm_proc_dump_ns(struct file *file, const char *buffer,
unsigned long count, void *data)
{
- ldlm_dump_all_namespaces(D_DLMTRACE);
+ ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
+ ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
RETURN(count);
}
lprocfs_remove(&ldlm_type_proc_dir);
}
-static int lprocfs_uint_rd(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- unsigned int *temp = (unsigned int *)data;
- return snprintf(page, count, "%u\n", *temp);
-}
-
-#define MAX_STRING_SIZE 128
-static int lprocfs_uint_wr(struct file *file, const char *buffer,
- unsigned long count, void *data)
-{
- unsigned *p = data;
- char dummy[MAX_STRING_SIZE + 1], *end;
- unsigned long tmp;
-
- dummy[MAX_STRING_SIZE] = '\0';
- if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
- return -EFAULT;
-
- tmp = simple_strtoul(dummy, &end, 0);
- if (dummy == end)
- return -EINVAL;
-
- *p = (unsigned int)tmp;
- return count;
-}
-
-static int lprocfs_read_lru_size(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int lprocfs_rd_lru_size(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
{
struct ldlm_namespace *ns = data;
- return snprintf(page, count, "%u\n", ns->ns_max_unused);
+ __u32 *nr = &ns->ns_max_unused;
+
+ if (ns_connect_lru_resize(ns))
+ nr = &ns->ns_nr_unused;
+ return lprocfs_rd_uint(page, start, off, count, eof, nr);
}
-static int lprocfs_write_lru_size(struct file *file, const char *buffer,
- unsigned long count, void *data)
+static int lprocfs_wr_lru_size(struct file *file, const char *buffer,
+ unsigned long count, void *data)
{
struct ldlm_namespace *ns = data;
char dummy[MAX_STRING_SIZE + 1], *end;
CDEBUG(D_DLMTRACE,
"dropping all unused locks from namespace %s\n",
ns->ns_name);
- tmp = ns->ns_max_unused;
- ns->ns_max_unused = 0;
- ldlm_cancel_lru(ns, LDLM_SYNC);
- ns->ns_max_unused = tmp;
+ if (ns_connect_lru_resize(ns)) {
+ int canceled, unused = ns->ns_nr_unused;
+
+ /* Try to cancel all @ns_nr_unused locks. */
+ canceled = ldlm_cancel_lru(ns, unused, LDLM_SYNC);
+ if (canceled < unused) {
+ CERROR("not all requested locks are canceled, "
+ "requested: %d, canceled: %d\n", unused,
+ canceled);
+ return -EINVAL;
+ }
+ } else {
+ tmp = ns->ns_max_unused;
+ ns->ns_max_unused = 0;
+ ldlm_cancel_lru(ns, 0, LDLM_SYNC);
+ ns->ns_max_unused = tmp;
+ }
return count;
}
tmp = simple_strtoul(dummy, &end, 0);
- if (tmp == 0 && *end) {
+ if (*end) {
CERROR("invalid value written\n");
return -EINVAL;
}
- CDEBUG(D_DLMTRACE, "changing namespace %s max_unused from %u to %u\n",
- ns->ns_name, ns->ns_max_unused, (unsigned int)tmp);
- ns->ns_max_unused = (unsigned int)tmp;
-
- ldlm_cancel_lru(ns, LDLM_ASYNC);
+ if (ns_connect_lru_resize(ns)) {
+ if (tmp > ns->ns_nr_unused)
+ tmp = ns->ns_nr_unused;
+ tmp = ns->ns_nr_unused - tmp;
+
+ CDEBUG(D_DLMTRACE, "changing namespace %s unused locks from %u to %u\n",
+ ns->ns_name, ns->ns_nr_unused, (unsigned int)tmp);
+ ldlm_cancel_lru(ns, (unsigned int)tmp, LDLM_ASYNC);
+ } else {
+ CDEBUG(D_DLMTRACE, "changing namespace %s max_unused from %u to %u\n",
+ ns->ns_name, ns->ns_max_unused, (unsigned int)tmp);
+ ns->ns_max_unused = (unsigned int)tmp;
+ ldlm_cancel_lru(ns, 0, LDLM_ASYNC);
+ }
return count;
}
snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_unused_count",
ns->ns_name);
lock_vars[0].data = &ns->ns_nr_unused;
- lock_vars[0].read_fptr = lprocfs_uint_rd;
+ lock_vars[0].read_fptr = lprocfs_rd_uint;
lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
snprintf(lock_name, MAX_STRING_SIZE, "%s/lru_size",
ns->ns_name);
lock_vars[0].data = ns;
- lock_vars[0].read_fptr = lprocfs_read_lru_size;
- lock_vars[0].write_fptr = lprocfs_write_lru_size;
+ lock_vars[0].read_fptr = lprocfs_rd_lru_size;
+ lock_vars[0].write_fptr = lprocfs_wr_lru_size;
lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
snprintf(lock_name, MAX_STRING_SIZE, "%s/lru_max_age",
ns->ns_name);
lock_vars[0].data = &ns->ns_max_age;
- lock_vars[0].read_fptr = lprocfs_uint_rd;
- lock_vars[0].write_fptr = lprocfs_uint_wr;
+ lock_vars[0].read_fptr = lprocfs_rd_uint;
+ lock_vars[0].write_fptr = lprocfs_wr_uint;
lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
}
#define ldlm_proc_namespace(ns) do {} while (0)
#endif /* LPROCFS */
-struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 client)
+struct ldlm_namespace *ldlm_namespace_new(char *name, ldlm_side_t client,
+ ldlm_appetite_t apt)
{
struct ldlm_namespace *ns = NULL;
struct list_head *bucket;
- int rc;
+ int rc, idx;
ENTRY;
- rc = ldlm_get_ref();
+ rc = ldlm_get_ref(client);
if (rc) {
CERROR("ldlm_get_ref failed: %d\n", rc);
RETURN(NULL);
}
- OBD_ALLOC(ns, sizeof(*ns));
+ OBD_ALLOC_PTR(ns);
if (!ns)
GOTO(out_ref, NULL);
if (!ns->ns_hash)
GOTO(out_ns, NULL);
+ ns->ns_appetite = apt;
OBD_ALLOC(ns->ns_name, strlen(name) + 1);
if (!ns->ns_name)
GOTO(out_hash, NULL);
ns->ns_max_age = LDLM_DEFAULT_MAX_ALIVE;
spin_lock_init(&ns->ns_unused_lock);
- mutex_down(&ldlm_namespace_lock);
- list_add(&ns->ns_list_chain, &ldlm_namespace_list);
- mutex_up(&ldlm_namespace_lock);
+ ns->ns_connect_flags = 0;
+ mutex_down(ldlm_namespace_lock(client));
+ list_add(&ns->ns_list_chain, ldlm_namespace_list(client));
+ idx = atomic_read(ldlm_namespace_nr(client));
+ atomic_inc(ldlm_namespace_nr(client));
+ mutex_up(ldlm_namespace_lock(client));
ldlm_proc_namespace(ns);
+
+ rc = ldlm_pool_init(&ns->ns_pool, ns, idx, client);
+ if (rc) {
+ CERROR("can't initialize lock pool, rc %d\n", rc);
+ GOTO(out_del, rc);
+ }
RETURN(ns);
+out_del:
+ mutex_down(ldlm_namespace_lock(client));
+ list_del(&ns->ns_list_chain);
+ atomic_dec(ldlm_namespace_nr(client));
+ mutex_up(ldlm_namespace_lock(client));
out_hash:
POISON(ns->ns_hash, 0x5a, sizeof(*ns->ns_hash) * RES_HASH_SIZE);
OBD_VFREE(ns->ns_hash, sizeof(*ns->ns_hash) * RES_HASH_SIZE);
out_ns:
- OBD_FREE(ns, sizeof(*ns));
+ OBD_FREE_PTR(ns);
out_ref:
- ldlm_put_ref(0);
+ ldlm_put_ref(client, 0);
RETURN(NULL);
}
/* Cleanup, but also free, the namespace */
int ldlm_namespace_free(struct ldlm_namespace *ns, int force)
{
+ ldlm_side_t client;
ENTRY;
if (!ns)
RETURN(ELDLM_OK);
- mutex_down(&ldlm_namespace_lock);
+ client = ns->ns_client;
+ mutex_down(ldlm_namespace_lock(client));
list_del(&ns->ns_list_chain);
- mutex_up(&ldlm_namespace_lock);
+ atomic_dec(ldlm_namespace_nr(ns->ns_client));
+ ldlm_pool_fini(&ns->ns_pool);
+ mutex_up(ldlm_namespace_lock(client));
/* At shutdown time, don't call the cancellation callback */
ldlm_namespace_cleanup(ns, 0);
POISON(ns->ns_hash, 0x5a, sizeof(*ns->ns_hash) * RES_HASH_SIZE);
OBD_VFREE(ns->ns_hash, sizeof(*ns->ns_hash) * RES_HASH_SIZE);
OBD_FREE(ns->ns_name, strlen(ns->ns_name) + 1);
- OBD_FREE(ns, sizeof(*ns));
+ OBD_FREE_PTR(ns);
- ldlm_put_ref(force);
+ ldlm_put_ref(client, force);
RETURN(ELDLM_OK);
}
+void ldlm_namespace_get_nolock(struct ldlm_namespace *ns)
+{
+ LASSERT(ns->ns_refcount >= 0);
+ ns->ns_refcount++;
+}
+
+void ldlm_namespace_get(struct ldlm_namespace *ns)
+{
+ spin_lock(&ns->ns_hash_lock);
+ ldlm_namespace_get_nolock(ns);
+ spin_unlock(&ns->ns_hash_lock);
+}
+
+void ldlm_namespace_put_nolock(struct ldlm_namespace *ns, int wakeup)
+{
+ LASSERT(ns->ns_refcount > 0);
+ ns->ns_refcount--;
+ if (ns->ns_refcount == 0 && wakeup)
+ wake_up(&ns->ns_waitq);
+}
+
+void ldlm_namespace_put(struct ldlm_namespace *ns, int wakeup)
+{
+ spin_lock(&ns->ns_hash_lock);
+ ldlm_namespace_put_nolock(ns, wakeup);
+ spin_unlock(&ns->ns_hash_lock);
+}
+
+/* Should be called under ldlm_namespace_lock(client) taken */
+void ldlm_namespace_move(struct ldlm_namespace *ns, ldlm_side_t client)
+{
+ LASSERT(!list_empty(&ns->ns_list_chain));
+ LASSERT_SEM_LOCKED(ldlm_namespace_lock(client));
+ list_move_tail(&ns->ns_list_chain, ldlm_namespace_list(client));
+}
+
+/* Should be called under ldlm_namespace_lock(client) taken */
+struct ldlm_namespace *ldlm_namespace_first(ldlm_side_t client)
+{
+ LASSERT_SEM_LOCKED(ldlm_namespace_lock(client));
+ LASSERT(!list_empty(ldlm_namespace_list(client)));
+ return container_of(ldlm_namespace_list(client)->next,
+ struct ldlm_namespace, ns_list_chain);
+}
static __u32 ldlm_hash_fn(struct ldlm_resource *parent,
const struct ldlm_res_id *name)
{
bucket = ns->ns_hash + hash;
list_add(&res->lr_hash, bucket);
ns->ns_resources++;
- ns->ns_refcount++;
+ ldlm_namespace_get_nolock(ns);
if (parent == NULL) {
list_add(&res->lr_childof, &ns->ns_root_list);
LBUG();
}
- ns->ns_refcount--;
+ /* Pass 0 here to not wake ->ns_waitq up yet, we will do it few
+ * lines below when all children are freed. */
+ ldlm_namespace_put_nolock(ns, 0);
list_del_init(&res->lr_hash);
list_del_init(&res->lr_childof);
desc->lr_name = res->lr_name;
}
-void ldlm_dump_all_namespaces(int level)
+void ldlm_dump_all_namespaces(ldlm_side_t client, int level)
{
struct list_head *tmp;
if (!((libcfs_debug | D_ERROR) & level))
return;
- mutex_down(&ldlm_namespace_lock);
+ mutex_down(ldlm_namespace_lock(client));
- list_for_each(tmp, &ldlm_namespace_list) {
+ list_for_each(tmp, ldlm_namespace_list(client)) {
struct ldlm_namespace *ns;
ns = list_entry(tmp, struct ldlm_namespace, ns_list_chain);
ldlm_namespace_dump(level, ns);
}
- mutex_up(&ldlm_namespace_lock);
+ mutex_up(ldlm_namespace_lock(client));
}
void ldlm_namespace_dump(int level, struct ldlm_namespace *ns)
git://git.whamcloud.com / fs / lustre-release.git / blobdiff