diff options
Diffstat (limited to 'net/smc/smc_llc.c')
| -rw-r--r-- | net/smc/smc_llc.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index 8d2368accbad..0ea7ad6188ae 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -560,6 +560,25 @@ static int smc_llc_send_message(struct smc_link *link, void *llcbuf) return smc_wr_tx_send(link, pend); } +/* schedule an llc send on link, may wait for buffers, + * and wait for send completion notification. + * @return 0 on success + */ +static int smc_llc_send_message_wait(struct smc_link *link, void *llcbuf) +{ + struct smc_wr_tx_pend_priv *pend; + struct smc_wr_buf *wr_buf; + int rc; + + if (!smc_link_usable(link)) + return -ENOLINK; + rc = smc_llc_add_pending_send(link, &wr_buf, &pend); + if (rc) + return rc; + memcpy(wr_buf, llcbuf, sizeof(union smc_llc_msg)); + return smc_wr_tx_send_wait(link, pend, SMC_LLC_WAIT_TIME); +} + /********************************* receive ***********************************/ static int smc_llc_alloc_alt_link(struct smc_link_group *lgr, @@ -1215,6 +1234,29 @@ out: kfree(qentry); } +/* try to send a DELETE LINK ALL request on any active link, + * waiting for send completion + */ +void smc_llc_send_link_delete_all(struct smc_link_group *lgr, bool ord, u32 rsn) +{ + struct smc_llc_msg_del_link delllc = {0}; + int i; + + delllc.hd.common.type = SMC_LLC_DELETE_LINK; + delllc.hd.length = sizeof(delllc); + if (ord) + delllc.hd.flags |= SMC_LLC_FLAG_DEL_LINK_ORDERLY; + delllc.hd.flags |= SMC_LLC_FLAG_DEL_LINK_ALL; + delllc.reason = htonl(rsn); + + for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) { + if (!smc_link_usable(&lgr->lnk[i])) + continue; + if (!smc_llc_send_message_wait(&lgr->lnk[i], &delllc)) + break; + } +} + static void smc_llc_process_srv_delete_link(struct smc_link_group *lgr) { struct smc_llc_msg_del_link *del_llc; @@ -1230,6 +1272,8 @@ static void smc_llc_process_srv_delete_link(struct smc_link_group *lgr) if (qentry->msg.delete_link.hd.flags & SMC_LLC_FLAG_DEL_LINK_ALL) { /* delete entire lgr */ + smc_llc_send_link_delete_all(lgr, true, ntohl( + qentry->msg.delete_link.reason)); smc_lgr_terminate_sched(lgr); goto out; } |