leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

net/smc: rkey processing for a new link as SMC server

Browse Source 
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>
This commit is contained in:
Karsten Graul 2020-05-03 14:38:44 +02:00 committed by David S. Miller
parent 2d2209f201
commit 57b499242c
1 changed files with 42 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
net/smc/smc_llc.c
View File

@ -863,6 +863,47 @@ static void smc_llc_process_cli_add_link(struct smc_link_group *lgr)
mutex_unlock(&lgr->llc_conf_mutex); 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) int smc_llc_srv_add_link(struct smc_link *link)
{ {
enum smc_lgr_type lgr_new_t = SMC_LGR_SYMMETRIC; 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); rc = smcr_buf_reg_lgr(link_new);
if (rc) if (rc)
goto out_err; goto out_err;
/* tbd: rc = smc_llc_srv_rkey_exchange(link, link_new); */ rc = smc_llc_srv_rkey_exchange(link, link_new);
if (rc) if (rc)
goto out_err; goto out_err;
/* tbd: rc = smc_llc_srv_conf_link(link, link_new, lgr_new_t); */ /* tbd: rc = smc_llc_srv_conf_link(link, link_new, lgr_new_t); */