net/smc: introduce link group termination worker
Use a worker for link group termination to guarantee process context. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
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2a0674fffb
Коммит
f528ba24a8
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@ -219,6 +219,14 @@ static void smc_lgr_free_work(struct work_struct *work)
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smc_lgr_free(lgr);
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}
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static void smc_lgr_terminate_work(struct work_struct *work)
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{
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struct smc_link_group *lgr = container_of(work, struct smc_link_group,
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terminate_work);
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smc_lgr_terminate(lgr);
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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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@ -258,6 +266,7 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
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smc_lgr_list.num += SMC_LGR_NUM_INCR;
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memcpy(&lgr->id, (u8 *)&smc_lgr_list.num, SMC_LGR_ID_SIZE);
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INIT_DELAYED_WORK(&lgr->free_work, smc_lgr_free_work);
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INIT_WORK(&lgr->terminate_work, smc_lgr_terminate_work);
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lgr->conns_all = RB_ROOT;
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if (ini->is_smcd) {
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/* SMC-D specific settings */
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@ -202,6 +202,7 @@ struct smc_link_group {
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u8 id[SMC_LGR_ID_SIZE]; /* unique lgr id */
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struct delayed_work free_work; /* delayed freeing of an lgr */
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struct work_struct terminate_work; /* abnormal lgr termination */
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u8 sync_err : 1; /* lgr no longer fits to peer */
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u8 terminating : 1;/* lgr is terminating */
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u8 freefast : 1; /* free worker scheduled fast */
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@ -282,6 +283,12 @@ static inline struct smc_connection *smc_lgr_find_conn(
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return res;
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}
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static inline void smc_lgr_terminate_sched(struct smc_link_group *lgr)
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{
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if (!lgr->terminating)
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schedule_work(&lgr->terminate_work);
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}
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struct smc_sock;
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struct smc_clc_msg_accept_confirm;
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struct smc_clc_msg_local;
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@ -475,7 +475,7 @@ static void smc_llc_rx_delete_link(struct smc_link *link,
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smc_llc_prep_delete_link(llc, link, SMC_LLC_RESP, true);
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}
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smc_llc_send_message(link, llc, sizeof(*llc));
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smc_lgr_schedule_free_work_fast(lgr);
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smc_lgr_terminate_sched(lgr);
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}
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}
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@ -101,7 +101,7 @@ static inline void smc_wr_tx_process_cqe(struct ib_wc *wc)
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clear_bit(i, link->wr_tx_mask);
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}
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/* terminate connections of this link group abnormally */
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smc_lgr_terminate(smc_get_lgr(link));
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smc_lgr_terminate_sched(smc_get_lgr(link));
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}
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if (pnd_snd.handler)
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pnd_snd.handler(&pnd_snd.priv, link, wc->status);
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@ -191,7 +191,7 @@ int smc_wr_tx_get_free_slot(struct smc_link *link,
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SMC_WR_TX_WAIT_FREE_SLOT_TIME);
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if (!rc) {
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/* timeout - terminate connections */
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smc_lgr_terminate(smc_get_lgr(link));
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smc_lgr_terminate_sched(smc_get_lgr(link));
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return -EPIPE;
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}
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if (idx == link->wr_tx_cnt)
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@ -247,7 +247,7 @@ int smc_wr_tx_send(struct smc_link *link, struct smc_wr_tx_pend_priv *priv)
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rc = ib_post_send(link->roce_qp, &link->wr_tx_ibs[pend->idx], NULL);
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if (rc) {
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smc_wr_tx_put_slot(link, priv);
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smc_lgr_terminate(smc_get_lgr(link));
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smc_lgr_terminate_sched(smc_get_lgr(link));
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}
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return rc;
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}
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@ -272,7 +272,7 @@ int smc_wr_reg_send(struct smc_link *link, struct ib_mr *mr)
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SMC_WR_REG_MR_WAIT_TIME);
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if (!rc) {
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/* timeout - terminate connections */
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smc_lgr_terminate(smc_get_lgr(link));
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smc_lgr_terminate_sched(smc_get_lgr(link));
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return -EPIPE;
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}
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if (rc == -ERESTARTSYS)
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@ -373,7 +373,7 @@ static inline void smc_wr_rx_process_cqes(struct ib_wc wc[], int num)
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/* terminate connections of this link group
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* abnormally
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*/
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smc_lgr_terminate(smc_get_lgr(link));
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smc_lgr_terminate_sched(smc_get_lgr(link));
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break;
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default:
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smc_wr_rx_post(link); /* refill WR RX */
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