* \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,
struct lnet_process_id match_id,
__u64 match_bits, __u64 ignore_bits,
- enum lnet_unlink unlink, enum lnet_ins_pos pos,
- struct lnet_handle_me *handle)
+ enum lnet_unlink unlink, enum lnet_ins_pos pos)
{
struct lnet_match_table *mtable;
struct lnet_me *me;
LASSERT(the_lnet.ln_refcount > 0);
if ((int)portal >= the_lnet.ln_nportals)
- return -EINVAL;
+ 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;
+ return ERR_PTR(-EPERM);
me = lnet_me_alloc();
if (me == NULL)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
lnet_res_lock(mtable->mt_cpt);
me->me_unlink = unlink;
me->me_md = NULL;
- lnet_res_lh_initialize(the_lnet.ln_me_containers[mtable->mt_cpt],
- &me->me_lh);
+ me->me_cpt = mtable->mt_cpt;
+
if (ignore_bits != 0)
head = &mtable->mt_mhash[LNET_MT_HASH_IGNORE];
else
else
list_add(&me->me_list, head);
- lnet_me2handle(handle, me);
-
lnet_res_unlock(mtable->mt_cpt);
- return 0;
+ return me;
}
EXPORT_SYMBOL(LNetMEAttach);
/**
- * 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(struct lnet_handle_me current_meh,
- struct lnet_process_id match_id,
- __u64 match_bits, __u64 ignore_bits,
- enum lnet_unlink unlink, enum lnet_ins_pos pos,
- struct lnet_handle_me *handle)
-{
- struct lnet_me *current_me;
- struct lnet_me *new_me;
- struct lnet_portal *ptl;
- int cpt;
-
- LASSERT(the_lnet.ln_refcount > 0);
-
- if (pos == LNET_INS_LOCAL)
- return -EPERM;
-
- new_me = lnet_me_alloc();
- if (new_me == NULL)
- return -ENOMEM;
-
- cpt = lnet_cpt_of_cookie(current_meh.cookie);
-
- lnet_res_lock(cpt);
-
- current_me = lnet_handle2me(¤t_meh);
- if (current_me == NULL) {
- lnet_me_free(new_me);
-
- lnet_res_unlock(cpt);
- 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(new_me);
- lnet_res_unlock(cpt);
- return -EPERM;
- }
-
- new_me->me_pos = current_me->me_pos;
- 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_containers[cpt], &new_me->me_lh);
-
- if (pos == LNET_INS_AFTER)
- list_add(&new_me->me_list, ¤t_me->me_list);
- else
- list_add_tail(&new_me->me_list, ¤t_me->me_list);
-
- lnet_me2handle(handle, new_me);
-
- lnet_res_unlock(cpt);
-
- return 0;
-}
-EXPORT_SYMBOL(LNetMEInsert);
-
-/**
* Unlink a match entry from its match list.
*
* This operation also releases any resources associated with the ME. If a
* \retval -ENOENT If \a meh does not point to a valid ME.
* \see LNetMDUnlink() for the discussion on delivering unlink event.
*/
-int
-LNetMEUnlink(struct lnet_handle_me meh)
+void
+LNetMEUnlink(struct lnet_me *me)
{
- struct lnet_me *me;
struct lnet_libmd *md;
struct lnet_event ev;
int cpt;
LASSERT(the_lnet.ln_refcount > 0);
- cpt = lnet_cpt_of_cookie(meh.cookie);
+ cpt = me->me_cpt;
lnet_res_lock(cpt);
- me = lnet_handle2me(&meh);
- if (me == NULL) {
- lnet_res_unlock(cpt);
- return -ENOENT;
- }
-
md = me->me_md;
if (md != NULL) {
md->md_flags |= LNET_MD_FLAG_ABORTED;
lnet_me_unlink(me);
lnet_res_unlock(cpt);
- return 0;
}
EXPORT_SYMBOL(LNetMEUnlink);
lnet_md_unlink(md);
}
- lnet_res_lh_invalidate(&me->me_lh);
lnet_me_free(me);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff