net/smc: separate function for link initialization
Move the initialization of a new link into its own function, separate from smc_lgr_create, to allow more than one link per link group. Do an extra check if the IB device initialization was successful, and reset the link state if any error occurs during smcr_link_init(). And rename two existing functions to use the prefix smcr_ to indicate that they belong to the SMC-R code path. 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
David S. Miller
Родитель
fdff704dc6
Коммит
f3c1deddb2
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@ -179,7 +179,7 @@ void smc_lgr_cleanup_early(struct smc_connection *conn)
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* of the DELETE LINK sequence from server; or as server to
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* initiate the delete processing. See smc_llc_rx_delete_link().
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*/
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static int smc_link_send_delete(struct smc_link *lnk, bool orderly)
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static int smcr_link_send_delete(struct smc_link *lnk, bool orderly)
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{
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if (lnk->state == SMC_LNK_ACTIVE &&
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!smc_llc_send_delete_link(lnk, SMC_LLC_REQ, orderly)) {
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@ -219,7 +219,7 @@ static void smc_lgr_free_work(struct work_struct *work)
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if (!lgr->is_smcd && !lgr->terminating) {
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/* try to send del link msg, on error free lgr immediately */
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if (lnk->state == SMC_LNK_ACTIVE &&
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!smc_link_send_delete(lnk, true)) {
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!smcr_link_send_delete(lnk, true)) {
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/* reschedule in case we never receive a response */
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smc_lgr_schedule_free_work(lgr);
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spin_unlock_bh(lgr_lock);
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@ -245,6 +245,64 @@ static void smc_lgr_terminate_work(struct work_struct *work)
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__smc_lgr_terminate(lgr, true);
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}
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static int smcr_link_init(struct smc_link *lnk, u8 link_id,
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struct smc_init_info *ini)
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{
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u8 rndvec[3];
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int rc;
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get_device(&ini->ib_dev->ibdev->dev);
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atomic_inc(&ini->ib_dev->lnk_cnt);
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lnk->state = SMC_LNK_ACTIVATING;
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lnk->link_id = link_id;
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lnk->smcibdev = ini->ib_dev;
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lnk->ibport = ini->ib_port;
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lnk->path_mtu = ini->ib_dev->pattr[ini->ib_port - 1].active_mtu;
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if (!ini->ib_dev->initialized) {
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rc = (int)smc_ib_setup_per_ibdev(ini->ib_dev);
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if (rc)
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goto out;
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}
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get_random_bytes(rndvec, sizeof(rndvec));
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lnk->psn_initial = rndvec[0] + (rndvec[1] << 8) +
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(rndvec[2] << 16);
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rc = smc_ib_determine_gid(lnk->smcibdev, lnk->ibport,
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ini->vlan_id, lnk->gid, &lnk->sgid_index);
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if (rc)
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goto out;
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rc = smc_llc_link_init(lnk);
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if (rc)
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goto out;
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rc = smc_wr_alloc_link_mem(lnk);
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if (rc)
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goto clear_llc_lnk;
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rc = smc_ib_create_protection_domain(lnk);
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if (rc)
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goto free_link_mem;
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rc = smc_ib_create_queue_pair(lnk);
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if (rc)
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goto dealloc_pd;
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rc = smc_wr_create_link(lnk);
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if (rc)
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goto destroy_qp;
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return 0;
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destroy_qp:
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smc_ib_destroy_queue_pair(lnk);
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dealloc_pd:
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smc_ib_dealloc_protection_domain(lnk);
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free_link_mem:
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smc_wr_free_link_mem(lnk);
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clear_llc_lnk:
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smc_llc_link_clear(lnk);
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out:
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put_device(&ini->ib_dev->ibdev->dev);
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memset(lnk, 0, sizeof(struct smc_link));
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if (!atomic_dec_return(&ini->ib_dev->lnk_cnt))
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wake_up(&ini->ib_dev->lnks_deleted);
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return rc;
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}
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/* create a new SMC link group */
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static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
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{
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@ -252,7 +310,6 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
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struct list_head *lgr_list;
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struct smc_link *lnk;
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spinlock_t *lgr_lock;
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u8 rndvec[3];
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int rc = 0;
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int i;
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@ -297,48 +354,17 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
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atomic_inc(&ini->ism_dev->lgr_cnt);
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} else {
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/* SMC-R specific settings */
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get_device(&ini->ib_dev->ibdev->dev);
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lgr->role = smc->listen_smc ? SMC_SERV : SMC_CLNT;
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memcpy(lgr->peer_systemid, ini->ib_lcl->id_for_peer,
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SMC_SYSTEMID_LEN);
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lnk = &lgr->lnk[SMC_SINGLE_LINK];
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/* initialize link */
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lnk->state = SMC_LNK_ACTIVATING;
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lnk->link_id = SMC_SINGLE_LINK;
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lnk->smcibdev = ini->ib_dev;
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lnk->ibport = ini->ib_port;
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rc = smcr_link_init(lnk, SMC_SINGLE_LINK, ini);
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if (rc)
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goto free_lgr;
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lgr_list = &smc_lgr_list.list;
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lgr_lock = &smc_lgr_list.lock;
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lnk->path_mtu =
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ini->ib_dev->pattr[ini->ib_port - 1].active_mtu;
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if (!ini->ib_dev->initialized)
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smc_ib_setup_per_ibdev(ini->ib_dev);
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get_random_bytes(rndvec, sizeof(rndvec));
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lnk->psn_initial = rndvec[0] + (rndvec[1] << 8) +
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(rndvec[2] << 16);
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rc = smc_ib_determine_gid(lnk->smcibdev, lnk->ibport,
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ini->vlan_id, lnk->gid,
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&lnk->sgid_index);
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if (rc)
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goto free_lgr;
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rc = smc_llc_link_init(lnk);
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if (rc)
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goto free_lgr;
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rc = smc_wr_alloc_link_mem(lnk);
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if (rc)
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goto clear_llc_lnk;
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rc = smc_ib_create_protection_domain(lnk);
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if (rc)
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goto free_link_mem;
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rc = smc_ib_create_queue_pair(lnk);
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if (rc)
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goto dealloc_pd;
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rc = smc_wr_create_link(lnk);
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if (rc)
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goto destroy_qp;
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atomic_inc(&lgr_cnt);
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atomic_inc(&ini->ib_dev->lnk_cnt);
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}
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smc->conn.lgr = lgr;
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spin_lock_bh(lgr_lock);
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@ -346,14 +372,6 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
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spin_unlock_bh(lgr_lock);
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return 0;
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destroy_qp:
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smc_ib_destroy_queue_pair(lnk);
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dealloc_pd:
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smc_ib_dealloc_protection_domain(lnk);
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free_link_mem:
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smc_wr_free_link_mem(lnk);
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clear_llc_lnk:
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smc_llc_link_clear(lnk);
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free_lgr:
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kfree(lgr);
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ism_put_vlan:
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@ -417,7 +435,7 @@ void smc_conn_free(struct smc_connection *conn)
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smc_lgr_schedule_free_work(lgr);
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}
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static void smc_link_clear(struct smc_link *lnk)
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static void smcr_link_clear(struct smc_link *lnk)
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{
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lnk->peer_qpn = 0;
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smc_llc_link_clear(lnk);
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@ -426,6 +444,7 @@ static void smc_link_clear(struct smc_link *lnk)
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smc_ib_destroy_queue_pair(lnk);
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smc_ib_dealloc_protection_domain(lnk);
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smc_wr_free_link_mem(lnk);
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put_device(&lnk->smcibdev->ibdev->dev);
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if (!atomic_dec_return(&lnk->smcibdev->lnk_cnt))
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wake_up(&lnk->smcibdev->lnks_deleted);
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}
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@ -512,8 +531,7 @@ static void smc_lgr_free(struct smc_link_group *lgr)
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if (!atomic_dec_return(&lgr->smcd->lgr_cnt))
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wake_up(&lgr->smcd->lgrs_deleted);
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} else {
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smc_link_clear(&lgr->lnk[SMC_SINGLE_LINK]);
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put_device(&lgr->lnk[SMC_SINGLE_LINK].smcibdev->ibdev->dev);
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smcr_link_clear(&lgr->lnk[SMC_SINGLE_LINK]);
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if (!atomic_dec_return(&lgr_cnt))
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wake_up(&lgrs_deleted);
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}
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