diff options
| author | Karsten Graul <kgraul@linux.ibm.com> | 2020-05-03 14:38:44 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-03 16:06:51 -0700 |
| commit | 57b499242cb888a32815f8663b60338bcb0b5747 (patch) | |
| tree | bd9f0c7601942211655f017f9dd7147d3bb67c46 /net/smc | |
| parent | 2d2209f2018943d4152a21eff5b76f1952e0b435 (diff) | |
| download | linux-57b499242cb888a32815f8663b60338bcb0b5747.tar.gz | |
net/smc: rkey processing for a new link as SMC server
Part of SMC server new link establishment is the exchange of rkeys for
used buffers.
Loop over all used RMB buffers and send ADD_LINK_CONTINUE LLC messages
to the peer.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc')
| -rw-r--r-- | net/smc/smc_llc.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index e2f254e21759..de73432bd72f 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -863,6 +863,47 @@ static void smc_llc_process_cli_add_link(struct smc_link_group *lgr) mutex_unlock(&lgr->llc_conf_mutex); } +static int smc_llc_srv_rkey_exchange(struct smc_link *link, + struct smc_link *link_new) +{ + struct smc_llc_msg_add_link_cont *addc_llc; + struct smc_link_group *lgr = link->lgr; + u8 max, num_rkeys_send, num_rkeys_recv; + struct smc_llc_qentry *qentry = NULL; + struct smc_buf_desc *buf_pos; + int buf_lst; + int rc = 0; + int i; + + mutex_lock(&lgr->rmbs_lock); + num_rkeys_send = lgr->conns_num; + buf_pos = smc_llc_get_first_rmb(lgr, &buf_lst); + do { + smc_llc_add_link_cont(link, link_new, &num_rkeys_send, + &buf_lst, &buf_pos); + qentry = smc_llc_wait(lgr, link, SMC_LLC_WAIT_TIME, + SMC_LLC_ADD_LINK_CONT); + if (!qentry) { + rc = -ETIMEDOUT; + goto out; + } + addc_llc = &qentry->msg.add_link_cont; + num_rkeys_recv = addc_llc->num_rkeys; + max = min_t(u8, num_rkeys_recv, SMC_LLC_RKEYS_PER_CONT_MSG); + for (i = 0; i < max; i++) { + smc_rtoken_set(lgr, link->link_idx, link_new->link_idx, + addc_llc->rt[i].rmb_key, + addc_llc->rt[i].rmb_vaddr_new, + addc_llc->rt[i].rmb_key_new); + num_rkeys_recv--; + } + smc_llc_flow_qentry_del(&lgr->llc_flow_lcl); + } while (num_rkeys_send || num_rkeys_recv); +out: + mutex_unlock(&lgr->rmbs_lock); + return rc; +} + int smc_llc_srv_add_link(struct smc_link *link) { enum smc_lgr_type lgr_new_t = SMC_LGR_SYMMETRIC; @@ -923,7 +964,7 @@ int smc_llc_srv_add_link(struct smc_link *link) rc = smcr_buf_reg_lgr(link_new); if (rc) goto out_err; - /* tbd: rc = smc_llc_srv_rkey_exchange(link, link_new); */ + rc = smc_llc_srv_rkey_exchange(link, link_new); if (rc) goto out_err; /* tbd: rc = smc_llc_srv_conf_link(link, link_new, lgr_new_t); */ |