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net/smc: improve server ISM device determination 

Move check whether peer can be reached into smc_pnet_find_ism_by_pnetid().
Thus searching continues for another ism device, if check fails.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2020-09-10 18:48:24 +02:00 committed by David S. Miller
parent 3d9725a6a1
commit 7b2977d083
3 changed files with 7 additions and 16 deletions
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17
net/smc/af_smc.c
View File

@ -1188,26 +1188,12 @@ static int smc_listen_ism_init(struct smc_sock *new_smc,
struct smc_clc_msg_proposal *pclc,
struct smc_init_info *ini)
{
struct smc_clc_msg_smcd *pclc_smcd;
int rc;
pclc_smcd = smc_get_clc_msg_smcd(pclc);
ini->ism_peer_gid = pclc_smcd->gid;
rc = smc_conn_create(new_smc, ini);
if (rc)
return rc;
/* Check if peer can be reached via ISM device */
if (smc_ism_cantalk(new_smc->conn.lgr->peer_gid,
new_smc->conn.lgr->vlan_id,
new_smc->conn.lgr->smcd)) {
if (ini->first_contact_local)
smc_lgr_cleanup_early(&new_smc->conn);
else
smc_conn_free(&new_smc->conn);
return SMC_CLC_DECL_SMCDNOTALK;
}
/* Create send and receive buffers */
rc = smc_buf_create(new_smc, true);
if (rc) {
@ -1338,7 +1324,10 @@ static void smc_listen_work(struct work_struct *work)
/* check if ISM is available */
if (pclc->hdr.path == SMC_TYPE_D || pclc->hdr.path == SMC_TYPE_B) {
struct smc_clc_msg_smcd *pclc_smcd = smc_get_clc_msg_smcd(pclc);
ini.is_smcd = true; /* prepare ISM check */
ini.ism_peer_gid = pclc_smcd->gid;
rc = smc_find_ism_device(new_smc, &ini);
if (!rc)
rc = smc_listen_ism_init(new_smc, pclc, &ini);

1
net/smc/smc_clc.h
View File

@ -37,7 +37,6 @@
#define SMC_CLC_DECL_NOSMCDEV 0x03030000 /* no SMC device found (R or D) */
#define SMC_CLC_DECL_NOSMCDDEV 0x03030001 /* no SMC-D device found */
#define SMC_CLC_DECL_NOSMCRDEV 0x03030002 /* no SMC-R device found */
#define SMC_CLC_DECL_SMCDNOTALK 0x03030003 /* SMC-D dev can't talk to peer */
#define SMC_CLC_DECL_MODEUNSUPP 0x03040000 /* smc modes do not match (R or D)*/
#define SMC_CLC_DECL_RMBE_EC 0x03050000 /* peer has eyecatcher in RMBE */
#define SMC_CLC_DECL_OPTUNSUPP 0x03060000 /* fastopen sockopt not supported */

5
net/smc/smc_pnet.c
View File

@ -928,7 +928,10 @@ static void smc_pnet_find_ism_by_pnetid(struct net_device *ndev,
mutex_lock(&smcd_dev_list.mutex);
list_for_each_entry(ismdev, &smcd_dev_list.list, list) {
if (smc_pnet_match(ismdev->pnetid, ndev_pnetid) &&
!ismdev->going_away) {
!ismdev->going_away &&
(!ini->ism_peer_gid ||
!smc_ism_cantalk(ini->ism_peer_gid, ini->vlan_id,
ismdev))) {
ini->ism_dev = ismdev;
break;
}