prov/shm: fix shm multi recv setopt segfault

shm uses the util srx and sets the minimum multi receive size through
the srx. However, the srx code doesn't get initialized until the endpoint
gets enabled. So if the application calls setopt (before FI_ENABLE), this
will segfault because the srx has not been initialized. Instead, we need
to save the multi recv size in the shm endpoint to be valid during setopt
and then pass that into the util_srx creation to set the multi recv size

Signed-off-by: Alexia Ingerson <[email protected]>

prov/shm/src/smr.h

@@ -229,6 +229,7 @@ struct smr_ep {
 	struct smr_tx_fs	*tx_fs;
 	struct dlist_entry	sar_list;
 	struct dlist_entry	ipc_cpy_pend_list;
+	size_t			min_multi_recv_size;
 
 	int			ep_idx;
 	enum ofi_shm_p2p_type	p2p_type;

prov/shm/src/smr_ep.c

@@ -128,14 +128,12 @@ int smr_ep_setopt(fid_t fid, int level, int optname, const void *optval,
 {
 	struct smr_ep *smr_ep =
 		container_of(fid, struct smr_ep, util_ep.ep_fid);
-	struct util_srx_ctx *srx;
 
 	if (level != FI_OPT_ENDPOINT)
 		return -FI_ENOPROTOOPT;
 
 	if (optname == FI_OPT_MIN_MULTI_RECV) {
-		srx = smr_ep->srx->ep_fid.fid.context;
-		srx->min_multi_recv_size = *(size_t *)optval;
+		smr_ep->min_multi_recv_size = *(size_t *)optval;
 		return FI_SUCCESS;
 	}
 
@@ -1146,7 +1144,7 @@ static int smr_ep_ctrl(struct fid *fid, int command, void *arg)
 					      util_domain.domain_fid);
 			ret = util_ep_srx_context(&domain->util_domain,
 					ep->rx_size, SMR_IOV_LIMIT,
-					SMR_INJECT_SIZE, &smr_update,
+					ep->min_multi_recv_size, &smr_update,
 					&ep->util_ep.lock, &srx);
 			if (ret)
 				return ret;
@@ -1308,6 +1306,8 @@ int smr_endpoint(struct fid_domain *domain, struct fi_info *info,
 	dlist_init(&ep->sar_list);
 	dlist_init(&ep->ipc_cpy_pend_list);
 
+	ep->min_multi_recv_size = SMR_INJECT_SIZE;
+
 	ep->util_ep.ep_fid.fid.ops = &smr_ep_fi_ops;
 	ep->util_ep.ep_fid.ops = &smr_ep_ops;
 	ep->util_ep.ep_fid.cm = &smr_cm_ops;