* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#define DEBUG_SUBSYSTEM S_PORTALS
#include <portals/api-support.h>
-int ptl_init;
-
/* Put some magic in the NI handle so uninitialised/zeroed handles are easy
* to spot */
#define NI_HANDLE_MAGIC 0xebc0de00
#define NI_HANDLE_MASK 0x000000ff
-
-static struct nal_t *ptl_nal_table[NAL_MAX_NR];
-
-#ifdef __KERNEL__
-DECLARE_MUTEX(ptl_mutex);
-
-static void ptl_mutex_enter (void)
-{
- down (&ptl_mutex);
-}
-
-static void ptl_mutex_exit (void)
-{
- up (&ptl_mutex);
-}
-#else
-static void ptl_mutex_enter (void)
-{
-}
-
-static void ptl_mutex_exit (void)
-{
-}
-#endif
+#define MAX_NIS 8
+static nal_t *ptl_interfaces[MAX_NIS];
+int ptl_num_interfaces = 0;
nal_t *ptl_hndl2nal(ptl_handle_any_t *handle)
{
return NULL;
idx &= NI_HANDLE_MASK;
-
- if (idx >= NAL_MAX_NR ||
- ptl_nal_table[idx] == NULL ||
- ptl_nal_table[idx]->nal_refct == 0)
- return NULL;
+ if (idx < MAX_NIS)
+ return ptl_interfaces[idx];
- return ptl_nal_table[idx];
+ return NULL;
}
-int ptl_register_nal (ptl_interface_t interface, nal_t *nal)
+int ptl_ni_init(void)
{
- int rc;
-
- ptl_mutex_enter();
+ int i;
+
+ LASSERT (MAX_NIS <= (NI_HANDLE_MASK + 1));
- if (interface < 0 || interface >= NAL_MAX_NR)
- rc = PTL_IFACE_INVALID;
- else if (ptl_nal_table[interface] != NULL)
- rc = PTL_IFACE_DUP;
- else {
- rc = PTL_OK;
- ptl_nal_table[interface] = nal;
- LASSERT(nal->nal_refct == 0);
- }
+ for (i = 0; i < MAX_NIS; i++)
+ ptl_interfaces[i] = NULL;
- ptl_mutex_exit();
- return (rc);
+ return PTL_OK;
}
-void ptl_unregister_nal (ptl_interface_t interface)
+void ptl_ni_fini(void)
{
- LASSERT(interface >= 0 && interface < NAL_MAX_NR);
- LASSERT(ptl_nal_table[interface] != NULL);
- LASSERT(ptl_nal_table[interface]->nal_refct == 0);
-
- ptl_mutex_enter();
-
- ptl_nal_table[interface] = NULL;
+ int i;
- ptl_mutex_exit();
+ for (i = 0; i < MAX_NIS; i++) {
+ nal_t *nal = ptl_interfaces[i];
+ if (!nal)
+ continue;
+
+ if (nal->shutdown)
+ nal->shutdown(nal, i);
+ }
}
-int ptl_ni_init(void)
+#ifdef __KERNEL__
+DECLARE_MUTEX(ptl_ni_init_mutex);
+
+static void ptl_ni_init_mutex_enter (void)
{
- /* If this assertion fails, we need more bits in NI_HANDLE_MASK and
- * to shift NI_HANDLE_MAGIC left appropriately */
- LASSERT (NAL_MAX_NR <= (NI_HANDLE_MASK + 1));
-
- ptl_mutex_enter();
-
- if (!ptl_init) {
- /* NULL pointers, clear flags */
- memset(ptl_nal_table, 0, sizeof(ptl_nal_table));
-#ifndef __KERNEL__
- /* Kernel NALs register themselves when their module loads,
- * and unregister themselves when their module is unloaded.
- * Userspace NALs, are plugged in explicitly here... */
- {
- extern nal_t procapi_nal;
-
- /* XXX pretend it's socknal to keep liblustre happy... */
- ptl_nal_table[SOCKNAL] = &procapi_nal;
- LASSERT (procapi_nal.nal_refct == 0);
- }
-#endif
- ptl_init = 1;
- }
+ down (&ptl_ni_init_mutex);
+}
- ptl_mutex_exit();
-
- return PTL_OK;
+static void ptl_ni_init_mutex_exit (void)
+{
+ up (&ptl_ni_init_mutex);
}
-void ptl_ni_fini(void)
+#else
+static void ptl_ni_init_mutex_enter (void)
{
- nal_t *nal;
- int i;
-
- ptl_mutex_enter();
-
- if (ptl_init) {
- for (i = 0; i < NAL_MAX_NR; i++) {
-
- nal = ptl_nal_table[i];
- if (nal == NULL)
- continue;
-
- if (nal->nal_refct != 0) {
- CWARN("NAL %d has outstanding refcount %d\n",
- i, nal->nal_refct);
- nal->shutdown(nal);
- }
-
- ptl_nal_table[i] = NULL;
- }
+}
- ptl_init = 0;
- }
-
- ptl_mutex_exit();
+static void ptl_ni_init_mutex_exit (void)
+{
}
-int PtlNIInit(ptl_interface_t interface, ptl_pid_t requested_pid,
- ptl_ni_limits_t *desired_limits, ptl_ni_limits_t *actual_limits,
- ptl_handle_ni_t *handle)
+#endif
+
+int PtlNIInit(ptl_interface_t interface, ptl_pt_index_t ptl_size,
+ ptl_ac_index_t acl_size, ptl_pid_t requested_pid,
+ ptl_handle_ni_t * handle)
{
nal_t *nal;
- int i;
- int rc;
+ int i;
if (!ptl_init)
return PTL_NO_INIT;
- ptl_mutex_enter ();
+ ptl_ni_init_mutex_enter ();
- if (interface == PTL_IFACE_DEFAULT) {
- for (i = 0; i < NAL_MAX_NR; i++)
- if (ptl_nal_table[i] != NULL) {
- interface = i;
- break;
- }
- /* NB if no interfaces are registered, 'interface' will
- * fail the valid test below */
+ nal = interface(ptl_num_interfaces, ptl_size, acl_size, requested_pid);
+
+ if (!nal) {
+ ptl_ni_init_mutex_exit ();
+ return PTL_NAL_FAILED;
}
-
- if (interface < 0 ||
- interface >= NAL_MAX_NR ||
- ptl_nal_table[interface] == NULL) {
- GOTO(out, rc = PTL_IFACE_INVALID);
+
+ for (i = 0; i < ptl_num_interfaces; i++) {
+ if (ptl_interfaces[i] == nal) {
+ nal->refct++;
+ handle->nal_idx = (NI_HANDLE_MAGIC & ~NI_HANDLE_MASK) | i;
+ CDEBUG(D_OTHER, "Returning existing NAL (%d)\n", i);
+ ptl_ni_init_mutex_exit ();
+ return PTL_OK;
+ }
}
+ nal->refct = 1;
- nal = ptl_nal_table[interface];
+ if (ptl_num_interfaces >= MAX_NIS) {
+ if (nal->shutdown)
+ nal->shutdown (nal, ptl_num_interfaces);
+ ptl_ni_init_mutex_exit ();
+ return PTL_NO_SPACE;
+ }
- CDEBUG(D_OTHER, "Starting up NAL (%d) refs %d\n", interface, nal->nal_refct);
- rc = nal->startup(nal, requested_pid, desired_limits, actual_limits);
+ handle->nal_idx = (NI_HANDLE_MAGIC & ~NI_HANDLE_MASK) | ptl_num_interfaces;
+ ptl_interfaces[ptl_num_interfaces++] = nal;
- if (rc != PTL_OK) {
- CERROR("Error %d starting up NAL %d, refs %d\n", rc,
- interface, nal->nal_refct);
- GOTO(out, rc);
- }
-
- if (nal->nal_refct != 0) {
- /* Caller gets to know if this was the first ref or not */
- rc = PTL_IFACE_DUP;
- }
-
- nal->nal_refct++;
- handle->nal_idx = (NI_HANDLE_MAGIC & ~NI_HANDLE_MASK) | interface;
+ ptl_eq_ni_init(nal);
+ ptl_me_ni_init(nal);
- out:
- ptl_mutex_exit ();
- return rc;
+ ptl_ni_init_mutex_exit ();
+ return PTL_OK;
}
+
int PtlNIFini(ptl_handle_ni_t ni)
{
nal_t *nal;
- int idx;
+ int idx;
+ int rc;
if (!ptl_init)
return PTL_NO_INIT;
- ptl_mutex_enter ();
+ ptl_ni_init_mutex_enter ();
nal = ptl_hndl2nal (&ni);
if (nal == NULL) {
- ptl_mutex_exit ();
+ ptl_ni_init_mutex_exit ();
return PTL_HANDLE_INVALID;
}
idx = ni.nal_idx & NI_HANDLE_MASK;
- LASSERT(nal->nal_refct > 0);
+ nal->refct--;
+ if (nal->refct > 0) {
+ ptl_ni_init_mutex_exit ();
+ return PTL_OK;
+ }
- nal->nal_refct--;
+ ptl_me_ni_fini(nal);
+ ptl_eq_ni_fini(nal);
- /* nal_refct == 0 tells nal->shutdown to really shut down */
- nal->shutdown(nal);
+ rc = PTL_OK;
+ if (nal->shutdown)
+ rc = nal->shutdown(nal, idx);
- ptl_mutex_exit ();
- return PTL_OK;
+ ptl_interfaces[idx] = NULL;
+ ptl_num_interfaces--;
+
+ ptl_ni_init_mutex_exit ();
+ return rc;
}
int PtlNIHandle(ptl_handle_any_t handle_in, ptl_handle_ni_t * ni_out)
git://git.whamcloud.com / fs / lustre-release.git / blobdiff