/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2013, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#include <lnet/lib-lnet.h>
-/* must be called with LNET_LOCK held */
+/* must be called with lnet_res_lock held */
void
lnet_md_unlink(lnet_libmd_t *md)
{
/* Disassociate from ME (if any), and unlink it if it was created
* with LNET_UNLINK */
if (me != NULL) {
- md->md_me = NULL;
- me->me_md = NULL;
+ /* detach MD from portal */
+ lnet_ptl_detach_md(me, md);
if (me->me_unlink == LNET_UNLINK)
lnet_me_unlink(me);
}
/* ensure all future handle lookups fail */
- lnet_invalidate_handle(&md->md_lh);
+ lnet_res_lh_invalidate(&md->md_lh);
}
if (md->md_refcount != 0) {
CDEBUG(D_NET, "Unlinking md %p\n", md);
if (md->md_eq != NULL) {
- md->md_eq->eq_refcount--;
- LASSERT (md->md_eq->eq_refcount >= 0);
- }
+ int cpt = lnet_cpt_of_cookie(md->md_lh.lh_cookie);
- LASSERT (!cfs_list_empty(&md->md_list));
- cfs_list_del_init (&md->md_list);
- lnet_md_free(md);
+ LASSERT(*md->md_eq->eq_refs[cpt] > 0);
+ (*md->md_eq->eq_refs[cpt])--;
+ }
+
+ LASSERT(!list_empty(&md->md_list));
+ list_del_init(&md->md_list);
+ lnet_md_free(md);
}
-/* must be called with LNET_LOCK held */
static int
-lib_md_build(lnet_libmd_t *lmd, lnet_md_t *umd, int unlink)
+lnet_md_build(lnet_libmd_t *lmd, lnet_md_t *umd, int unlink)
{
- lnet_eq_t *eq = NULL;
int i;
unsigned int niov;
int total_length = 0;
- /* NB we are passed an allocated, but uninitialised/active md.
- * if we return success, caller may lnet_md_unlink() it.
- * otherwise caller may only lnet_md_free() it.
- */
-
- if (!LNetHandleIsInvalid (umd->eq_handle)) {
- eq = lnet_handle2eq(&umd->eq_handle);
- if (eq == NULL)
- return -ENOENT;
- }
-
- /* This implementation doesn't know how to create START events or
- * disable END events. Best to LASSERT our caller is compliant so
- * we find out quickly... */
- /* TODO - reevaluate what should be here in light of
- * the removal of the start and end events
- * maybe there we shouldn't even allow LNET_EQ_NONE!)
- LASSERT (eq == NULL);
- */
-
lmd->md_me = NULL;
lmd->md_start = umd->start;
lmd->md_offset = 0;
lmd->md_max_size = umd->max_size;
lmd->md_options = umd->options;
lmd->md_user_ptr = umd->user_ptr;
- lmd->md_eq = eq;
+ lmd->md_eq = NULL;
lmd->md_threshold = umd->threshold;
lmd->md_refcount = 0;
lmd->md_flags = (unlink == LNET_UNLINK) ? LNET_MD_FLAG_AUTO_UNLINK : 0;
return -EINVAL;
} else if ((umd->options & LNET_MD_KIOV) != 0) {
-#ifndef __KERNEL__
- return -EINVAL;
-#else
lmd->md_niov = niov = umd->length;
memcpy(lmd->md_iov.kiov, umd->start,
niov * sizeof (lmd->md_iov.kiov[0]));
for (i = 0; i < (int)niov; i++) {
/* We take the page pointer on trust */
if (lmd->md_iov.kiov[i].kiov_offset +
- lmd->md_iov.kiov[i].kiov_len > CFS_PAGE_SIZE )
+ lmd->md_iov.kiov[i].kiov_len > PAGE_CACHE_SIZE)
return -EINVAL; /* invalid length */
total_length += lmd->md_iov.kiov[i].kiov_len;
(umd->max_size < 0 ||
umd->max_size > total_length)) // illegal max_size
return -EINVAL;
-#endif
} else { /* contiguous */
lmd->md_length = umd->length;
lmd->md_niov = niov = 1;
return -EINVAL;
}
- if (eq != NULL)
- eq->eq_refcount++;
-
- /* It's good; let handle2md succeed and add to active mds */
- lnet_initialise_handle (&lmd->md_lh, LNET_COOKIE_TYPE_MD);
- LASSERT (cfs_list_empty(&lmd->md_list));
- cfs_list_add (&lmd->md_list, &the_lnet.ln_active_mds);
+ return 0;
+}
- return 0;
+/* must be called with resource lock held */
+static int
+lnet_md_link(lnet_libmd_t *md, lnet_handle_eq_t eq_handle, int cpt)
+{
+ struct lnet_res_container *container = the_lnet.ln_md_containers[cpt];
+
+ /* NB we are passed an allocated, but inactive md.
+ * if we return success, caller may lnet_md_unlink() it.
+ * otherwise caller may only lnet_md_free() it.
+ */
+ /* This implementation doesn't know how to create START events or
+ * disable END events. Best to LASSERT our caller is compliant so
+ * we find out quickly... */
+ /* TODO - reevaluate what should be here in light of
+ * the removal of the start and end events
+ * maybe there we shouldn't even allow LNET_EQ_NONE!)
+ * LASSERT (eq == NULL);
+ */
+ if (!LNetHandleIsInvalid(eq_handle)) {
+ md->md_eq = lnet_handle2eq(&eq_handle);
+
+ if (md->md_eq == NULL)
+ return -ENOENT;
+
+ (*md->md_eq->eq_refs[cpt])++;
+ }
+
+ lnet_res_lh_initialize(container, &md->md_lh);
+
+ LASSERT(list_empty(&md->md_list));
+ list_add(&md->md_list, &container->rec_active);
+
+ return 0;
}
-/* must be called with LNET_LOCK held */
+/* must be called with lnet_res_lock held */
void
lnet_md_deconstruct(lnet_libmd_t *lmd, lnet_md_t *umd)
{
lnet_eq2handle(&umd->eq_handle, lmd->md_eq);
}
-int
+static int
lnet_md_validate(lnet_md_t *umd)
{
if (umd->start == NULL && umd->length != 0) {
*/
int
LNetMDAttach(lnet_handle_me_t meh, lnet_md_t umd,
- lnet_unlink_t unlink, lnet_handle_md_t *handle)
+ lnet_unlink_t unlink, lnet_handle_md_t *handle)
{
- lnet_me_t *me;
- lnet_libmd_t *md;
- int rc;
+ struct list_head matches = LIST_HEAD_INIT(matches);
+ struct list_head drops = LIST_HEAD_INIT(drops);
+ struct lnet_me *me;
+ struct lnet_libmd *md;
+ int cpt;
+ int rc;
- LASSERT (the_lnet.ln_init);
LASSERT (the_lnet.ln_refcount > 0);
if (lnet_md_validate(&umd) != 0)
if (md == NULL)
return -ENOMEM;
- LNET_LOCK();
+ rc = lnet_md_build(md, &umd, unlink);
+ cpt = lnet_cpt_of_cookie(meh.cookie);
- me = lnet_handle2me(&meh);
- if (me == NULL) {
- rc = -ENOENT;
- } else if (me->me_md != NULL) {
- rc = -EBUSY;
- } else {
- rc = lib_md_build(md, &umd, unlink);
- if (rc == 0) {
- the_lnet.ln_portals[me->me_portal].ptl_ml_version++;
+ lnet_res_lock(cpt);
+ if (rc != 0)
+ goto failed;
- me->me_md = md;
- md->md_me = me;
+ me = lnet_handle2me(&meh);
+ if (me == NULL)
+ rc = -ENOENT;
+ else if (me->me_md != NULL)
+ rc = -EBUSY;
+ else
+ rc = lnet_md_link(md, umd.eq_handle, cpt);
- lnet_md2handle(handle, md);
+ if (rc != 0)
+ goto failed;
- /* check if this MD matches any blocked msgs */
- lnet_match_blocked_msg(md); /* expects LNET_LOCK held */
+ /* attach this MD to portal of ME and check if it matches any
+ * blocked msgs on this portal */
+ lnet_ptl_attach_md(me, md, &matches, &drops);
- LNET_UNLOCK();
- return (0);
- }
- }
+ lnet_md2handle(handle, md);
+
+ lnet_res_unlock(cpt);
+
+ lnet_drop_delayed_msg_list(&drops, "Bad match");
+ lnet_recv_delayed_msg_list(&matches);
- lnet_md_free (md);
+ return 0;
- LNET_UNLOCK();
- return (rc);
+ failed:
+ lnet_md_free(md);
+
+ lnet_res_unlock(cpt);
+ return rc;
}
+EXPORT_SYMBOL(LNetMDAttach);
/**
* Create a "free floating" memory descriptor - a MD that is not associated
int
LNetMDBind(lnet_md_t umd, lnet_unlink_t unlink, lnet_handle_md_t *handle)
{
- lnet_libmd_t *md;
- int rc;
+ lnet_libmd_t *md;
+ int cpt;
+ int rc;
- LASSERT (the_lnet.ln_init);
LASSERT (the_lnet.ln_refcount > 0);
if (lnet_md_validate(&umd) != 0)
if (md == NULL)
return -ENOMEM;
- LNET_LOCK();
+ rc = lnet_md_build(md, &umd, unlink);
- rc = lib_md_build(md, &umd, unlink);
+ cpt = lnet_res_lock_current();
+ if (rc != 0)
+ goto failed;
- if (rc == 0) {
- lnet_md2handle(handle, md);
+ rc = lnet_md_link(md, umd.eq_handle, cpt);
+ if (rc != 0)
+ goto failed;
- LNET_UNLOCK();
- return (0);
- }
+ lnet_md2handle(handle, md);
- lnet_md_free (md);
+ lnet_res_unlock(cpt);
+ return 0;
- LNET_UNLOCK();
- return (rc);
+ failed:
+ lnet_md_free(md);
+
+ lnet_res_unlock(cpt);
+ return rc;
}
+EXPORT_SYMBOL(LNetMDBind);
/**
* Unlink the memory descriptor from any ME it may be linked to and release
- * the internal resources associated with it.
+ * the internal resources associated with it. As a result, active messages
+ * associated with the MD may get aborted.
*
* This function does not free the memory region associated with the MD;
* i.e., the memory the user allocated for this MD. If the ME associated with
int
LNetMDUnlink (lnet_handle_md_t mdh)
{
- lnet_event_t ev;
- lnet_libmd_t *md;
+ lnet_event_t ev;
+ lnet_libmd_t *md;
+ int cpt;
- LASSERT (the_lnet.ln_init);
- LASSERT (the_lnet.ln_refcount > 0);
+ LASSERT(the_lnet.ln_refcount > 0);
- LNET_LOCK();
+ cpt = lnet_cpt_of_cookie(mdh.cookie);
+ lnet_res_lock(cpt);
- md = lnet_handle2md(&mdh);
- if (md == NULL) {
- LNET_UNLOCK();
+ md = lnet_handle2md(&mdh);
+ if (md == NULL) {
+ lnet_res_unlock(cpt);
return -ENOENT;
}
- /* If the MD is busy, lnet_md_unlink just marks it for deletion, and
- * when the NAL is done, the completion event flags that the MD was
- * unlinked. Otherwise, we enqueue an event now... */
-
- if (md->md_eq != NULL &&
- md->md_refcount == 0) {
- lnet_build_unlink_event(md, &ev);
- lnet_enq_event_locked(md->md_eq, &ev);
- }
+ md->md_flags |= LNET_MD_FLAG_ABORTED;
+ /* If the MD is busy, lnet_md_unlink just marks it for deletion, and
+ * when the LND is done, the completion event flags that the MD was
+ * unlinked. Otherwise, we enqueue an event now... */
+ if (md->md_eq != NULL && md->md_refcount == 0) {
+ lnet_build_unlink_event(md, &ev);
+ lnet_eq_enqueue_event(md->md_eq, &ev);
+ }
lnet_md_unlink(md);
- LNET_UNLOCK();
- return 0;
+ lnet_res_unlock(cpt);
+ return 0;
}
+EXPORT_SYMBOL(LNetMDUnlink);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff