*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* 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/
- * Lustre is a trademark of Sun Microsystems, Inc.
*
* lnet/lnet/lib-me.c
*
* \param portal The portal table index where the ME should be attached.
* \param match_id Specifies the match criteria for the process ID of
* the requester. The constants LNET_PID_ANY and LNET_NID_ANY can be
- * used to wildcard either of the identifiers in the lnet_process_id_t
+ * used to wildcard either of the identifiers in the struct lnet_process_id
* structure.
* \param match_bits,ignore_bits Specify the match criteria to apply
* to the match bits in the incoming request. The ignore bits are used
* \param pos Indicates whether the new ME should be prepended or
* appended to the match list. Allowed constants: LNET_INS_BEFORE,
* LNET_INS_AFTER.
- * \param handle On successful returns, a handle to the newly created ME
- * object is saved here. This handle can be used later in LNetMEInsert(),
- * LNetMEUnlink(), or LNetMDAttach() functions.
*
- * \retval 0 On success.
- * \retval -EINVAL If \a portal is invalid.
- * \retval -ENOMEM If new ME object cannot be allocated.
+ * \retval A handle to the newly created ME is returned on success
+ * \retval ERR_PTR(-EINVAL) If \a portal is invalid.
+ * \retval ERR_PTR(-ENOMEM) If new ME object cannot be allocated.
*/
-int
+struct lnet_me *
LNetMEAttach(unsigned int portal,
- lnet_process_id_t match_id,
- __u64 match_bits, __u64 ignore_bits,
- lnet_unlink_t unlink, lnet_ins_pos_t pos,
- lnet_handle_me_t *handle)
+ struct lnet_processid *match_id,
+ __u64 match_bits, __u64 ignore_bits,
+ enum lnet_unlink unlink, enum lnet_ins_pos pos)
{
struct lnet_match_table *mtable;
- lnet_me_t *me;
- cfs_list_t *head;
+ struct lnet_me *me;
+ struct list_head *head;
- LASSERT (the_lnet.ln_init);
- LASSERT (the_lnet.ln_refcount > 0);
+ LASSERT(the_lnet.ln_refcount > 0);
- if ((int)portal >= the_lnet.ln_nportals)
- return -EINVAL;
+ if ((int)portal >= the_lnet.ln_nportals)
+ return ERR_PTR(-EINVAL);
mtable = lnet_mt_of_attach(portal, match_id,
match_bits, ignore_bits, pos);
if (mtable == NULL) /* can't match portal type */
- return -EPERM;
-
- me = lnet_me_alloc();
- if (me == NULL)
- return -ENOMEM;
-
- LNET_LOCK();
-
- me->me_portal = portal;
- me->me_match_id = match_id;
- me->me_match_bits = match_bits;
- me->me_ignore_bits = ignore_bits;
- me->me_unlink = unlink;
- me->me_md = NULL;
-
- lnet_res_lh_initialize(&the_lnet.ln_me_container, &me->me_lh);
- head = lnet_mt_match_head(mtable, match_id, match_bits);
- LASSERT (head != NULL);
-
- if (pos == LNET_INS_AFTER)
- cfs_list_add_tail(&me->me_list, head);
- else
- cfs_list_add(&me->me_list, head);
-
- lnet_me2handle(handle, me);
-
- LNET_UNLOCK();
-
- return 0;
-}
-
-/**
- * Create and a match entry and insert it before or after the ME pointed to by
- * \a current_meh. The new ME is empty, i.e. not associated with a memory
- * descriptor. LNetMDAttach() can be used to attach a MD to an empty ME.
- *
- * This function is identical to LNetMEAttach() except for the position
- * where the new ME is inserted.
- *
- * \param current_meh A handle for a ME. The new ME will be inserted
- * immediately before or immediately after this ME.
- * \param match_id,match_bits,ignore_bits,unlink,pos,handle See the discussion
- * for LNetMEAttach().
- *
- * \retval 0 On success.
- * \retval -ENOMEM If new ME object cannot be allocated.
- * \retval -ENOENT If \a current_meh does not point to a valid match entry.
- */
-int
-LNetMEInsert(lnet_handle_me_t current_meh,
- lnet_process_id_t match_id,
- __u64 match_bits, __u64 ignore_bits,
- lnet_unlink_t unlink, lnet_ins_pos_t pos,
- lnet_handle_me_t *handle)
-{
- lnet_me_t *current_me;
- lnet_me_t *new_me;
- lnet_portal_t *ptl;
-
- LASSERT (the_lnet.ln_init);
- LASSERT (the_lnet.ln_refcount > 0);
-
- new_me = lnet_me_alloc();
- if (new_me == NULL)
- return -ENOMEM;
+ return ERR_PTR(-EPERM);
- LNET_LOCK();
-
- current_me = lnet_handle2me(¤t_meh);
- if (current_me == NULL) {
- lnet_me_free_locked(new_me);
-
- LNET_UNLOCK();
- return -ENOENT;
- }
-
- LASSERT (current_me->me_portal < the_lnet.ln_nportals);
-
- ptl = the_lnet.ln_portals[current_me->me_portal];
- if (lnet_ptl_is_unique(ptl)) {
- /* nosense to insertion on unique portal */
- lnet_me_free_locked(new_me);
- LNET_UNLOCK();
- return -EPERM;
- }
-
- new_me->me_portal = current_me->me_portal;
- new_me->me_match_id = match_id;
- new_me->me_match_bits = match_bits;
- new_me->me_ignore_bits = ignore_bits;
- new_me->me_unlink = unlink;
- new_me->me_md = NULL;
-
- lnet_res_lh_initialize(&the_lnet.ln_me_container, &new_me->me_lh);
-
- if (pos == LNET_INS_AFTER)
- cfs_list_add(&new_me->me_list, ¤t_me->me_list);
- else
- cfs_list_add_tail(&new_me->me_list, ¤t_me->me_list);
-
- lnet_me2handle(handle, new_me);
-
- LNET_UNLOCK();
-
- return 0;
-}
-
-/**
- * Unlink a match entry from its match list.
- *
- * This operation also releases any resources associated with the ME. If a
- * memory descriptor is attached to the ME, then it will be unlinked as well
- * and an unlink event will be generated. It is an error to use the ME handle
- * after calling LNetMEUnlink().
- *
- * \param meh A handle for the ME to be unlinked.
- *
- * \retval 0 On success.
- * \retval -ENOENT If \a meh does not point to a valid ME.
- * \see LNetMDUnlink() for the discussion on delivering unlink event.
- */
-int
-LNetMEUnlink(lnet_handle_me_t meh)
-{
- lnet_me_t *me;
- lnet_libmd_t *md;
- lnet_event_t ev;
+ me = kmem_cache_zalloc(lnet_mes_cachep, GFP_NOFS);
+ if (me == NULL) {
+ CDEBUG(D_MALLOC, "failed to allocate 'me'\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ CDEBUG(D_MALLOC, "slab-alloced 'me' at %p.\n", me);
- LASSERT (the_lnet.ln_init);
- LASSERT (the_lnet.ln_refcount > 0);
+ lnet_res_lock(mtable->mt_cpt);
- LNET_LOCK();
+ me->me_portal = portal;
+ me->me_match_id = *match_id;
+ me->me_match_bits = match_bits;
+ me->me_ignore_bits = ignore_bits;
+ me->me_unlink = unlink;
+ me->me_md = NULL;
- me = lnet_handle2me(&meh);
- if (me == NULL) {
- LNET_UNLOCK();
- return -ENOENT;
- }
+ me->me_cpt = mtable->mt_cpt;
- md = me->me_md;
- if (md != NULL &&
- md->md_eq != NULL &&
- md->md_refcount == 0) {
- lnet_build_unlink_event(md, &ev);
- lnet_eq_enqueue_event(md->md_eq, &ev);
- }
+ if (ignore_bits != 0)
+ head = &mtable->mt_mhash[LNET_MT_HASH_IGNORE];
+ else
+ head = lnet_mt_match_head(mtable, match_id, match_bits);
- lnet_me_unlink(me);
+ me->me_pos = head - &mtable->mt_mhash[0];
+ if (pos == LNET_INS_AFTER || pos == LNET_INS_LOCAL)
+ list_add_tail(&me->me_list, head);
+ else
+ list_add(&me->me_list, head);
- LNET_UNLOCK();
- return 0;
+ lnet_res_unlock(mtable->mt_cpt);
+ return me;
}
+EXPORT_SYMBOL(LNetMEAttach);
-/* call with LNET_LOCK please */
+/* call with lnet_res_lock please */
void
-lnet_me_unlink(lnet_me_t *me)
+lnet_me_unlink(struct lnet_me *me)
{
- cfs_list_del(&me->me_list);
+ list_del(&me->me_list);
if (me->me_md != NULL) {
- lnet_libmd_t *md = me->me_md;
+ struct lnet_libmd *md = me->me_md;
/* detach MD from portal of this ME */
lnet_ptl_detach_md(me, md);
lnet_md_unlink(md);
}
- lnet_res_lh_invalidate(&me->me_lh);
- lnet_me_free_locked(me);
+ CDEBUG(D_MALLOC, "slab-freed 'me' at %p.\n", me);
+ kmem_cache_free(lnet_mes_cachep, me);
}
#if 0
static void
-lib_me_dump(lnet_me_t *me)
+lib_me_dump(struct lnet_me *me)
{
- CWARN("Match Entry %p ("LPX64")\n", me,
- me->me_lh.lh_cookie);
+ CWARN("Match Entry %p (%#llx)\n", me,
+ me->me_lh.lh_cookie);
- CWARN("\tMatch/Ignore\t= %016lx / %016lx\n",
- me->me_match_bits, me->me_ignore_bits);
+ CWARN("\tMatch/Ignore\t= %016lx / %016lx\n",
+ me->me_match_bits, me->me_ignore_bits);
- CWARN("\tMD\t= %p\n", me->md);
- CWARN("\tprev\t= %p\n",
- cfs_list_entry(me->me_list.prev, lnet_me_t, me_list));
- CWARN("\tnext\t= %p\n",
- cfs_list_entry(me->me_list.next, lnet_me_t, me_list));
+ CWARN("\tMD\t= %p\n", me->md);
+ CWARN("\tprev\t= %p\n",
+ list_entry(me->me_list.prev, struct lnet_me, me_list));
+ CWARN("\tnext\t= %p\n",
+ list_entry(me->me_list.next, struct lnet_me, me_list));
}
#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff