diff options
author | Ursula Braun <ubraun@linux.ibm.com> | 2019-11-14 13:02:42 +0100 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-11-15 12:28:28 -0800 |
commit | 5421ec281df9dfda4418c02959e1f76097cabd9a (patch) | |
tree | ee4914cb9269d7d823bbb48fba48f7d359e4675b /net/smc | |
parent | 42bfba9eaa33dd4af0b50b87508062a41ec26653 (diff) |
net/smc: abnormal termination of SMCD link groups
A final cleanup due to SMCD device removal means immediate freeing
of all link groups belonging to this device in interrupt context.
This patch introduces a separate SMCD link group termination routine,
which terminates all link groups of an SMCD device.
This new routine smcd_terminate_all ()is reused if the smc module is
unloaded.
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>
Diffstat (limited to 'net/smc')
-rw-r--r-- | net/smc/smc_clc.c | 2 | ||||
-rw-r--r-- | net/smc/smc_core.c | 67 | ||||
-rw-r--r-- | net/smc/smc_core.h | 3 | ||||
-rw-r--r-- | net/smc/smc_ism.c | 2 | ||||
-rw-r--r-- | net/smc/smc_llc.c | 2 | ||||
-rw-r--r-- | net/smc/smc_tx.c | 2 |
6 files changed, 57 insertions, 21 deletions
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index 49bcebff6378..0879f7bed967 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -349,7 +349,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen, smc->peer_diagnosis = ntohl(dclc->peer_diagnosis); if (((struct smc_clc_msg_decline *)buf)->hdr.flag) { smc->conn.lgr->sync_err = 1; - smc_lgr_terminate(smc->conn.lgr); + smc_lgr_terminate(smc->conn.lgr, true); } } diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 9d6da2c7413d..d79dd78c1cd8 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -224,7 +224,7 @@ static void smc_lgr_terminate_work(struct work_struct *work) struct smc_link_group *lgr = container_of(work, struct smc_link_group, terminate_work); - smc_lgr_terminate(lgr); + smc_lgr_terminate(lgr, true); } /* create a new SMC link group */ @@ -528,7 +528,7 @@ static void smc_sk_wake_ups(struct smc_sock *smc) } /* kill a connection */ -static void smc_conn_kill(struct smc_connection *conn) +static void smc_conn_kill(struct smc_connection *conn, bool soft) { struct smc_sock *smc = container_of(conn, struct smc_sock, conn); @@ -541,7 +541,10 @@ static void smc_conn_kill(struct smc_connection *conn) smc_sk_wake_ups(smc); if (conn->lgr->is_smcd) { smc_ism_unset_conn(conn); - tasklet_kill(&conn->rx_tsklet); + if (soft) + tasklet_kill(&conn->rx_tsklet); + else + tasklet_unlock_wait(&conn->rx_tsklet); } smc_lgr_unregister_conn(conn); smc_close_active_abort(smc); @@ -562,7 +565,7 @@ static void smc_lgr_cleanup(struct smc_link_group *lgr) } /* terminate link group */ -static void __smc_lgr_terminate(struct smc_link_group *lgr) +static void __smc_lgr_terminate(struct smc_link_group *lgr, bool soft) { struct smc_connection *conn; struct smc_sock *smc; @@ -570,6 +573,8 @@ static void __smc_lgr_terminate(struct smc_link_group *lgr) if (lgr->terminating) return; /* lgr already terminating */ + if (!soft) + cancel_delayed_work_sync(&lgr->free_work); lgr->terminating = 1; if (!lgr->is_smcd) smc_llc_link_inactive(&lgr->lnk[SMC_SINGLE_LINK]); @@ -583,7 +588,7 @@ static void __smc_lgr_terminate(struct smc_link_group *lgr) smc = container_of(conn, struct smc_sock, conn); sock_hold(&smc->sk); /* sock_put below */ lock_sock(&smc->sk); - smc_conn_kill(conn); + smc_conn_kill(conn, soft); release_sock(&smc->sk); sock_put(&smc->sk); /* sock_hold above */ read_lock_bh(&lgr->conns_lock); @@ -591,11 +596,17 @@ static void __smc_lgr_terminate(struct smc_link_group *lgr) } read_unlock_bh(&lgr->conns_lock); smc_lgr_cleanup(lgr); - smc_lgr_schedule_free_work_fast(lgr); + if (soft) + smc_lgr_schedule_free_work_fast(lgr); + else + smc_lgr_free(lgr); } -/* unlink and terminate link group */ -void smc_lgr_terminate(struct smc_link_group *lgr) +/* unlink and terminate link group + * @soft: true if link group shutdown can take its time + * false if immediate link group shutdown is required + */ +void smc_lgr_terminate(struct smc_link_group *lgr, bool soft) { spinlock_t *lgr_lock; @@ -605,9 +616,11 @@ void smc_lgr_terminate(struct smc_link_group *lgr) spin_unlock_bh(lgr_lock); return; /* lgr already terminating */ } + if (!soft) + lgr->freeing = 1; list_del_init(&lgr->list); spin_unlock_bh(lgr_lock); - __smc_lgr_terminate(lgr); + __smc_lgr_terminate(lgr, soft); } /* Called when IB port is terminated */ @@ -627,11 +640,11 @@ void smc_port_terminate(struct smc_ib_device *smcibdev, u8 ibport) list_for_each_entry_safe(lgr, l, &lgr_free_list, list) { list_del_init(&lgr->list); - __smc_lgr_terminate(lgr); + __smc_lgr_terminate(lgr, true); } } -/* Called when SMC-D device is terminated or peer is lost */ +/* Called when peer lgr shutdown (regularly or abnormally) is received */ void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid, unsigned short vlan) { struct smc_link_group *lgr, *l; @@ -656,6 +669,24 @@ void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid, unsigned short vlan) } } +/* Called when an SMCD device is removed or the smc module is unloaded */ +void smc_smcd_terminate_all(struct smcd_dev *smcd) +{ + struct smc_link_group *lgr, *lg; + LIST_HEAD(lgr_free_list); + + spin_lock_bh(&smcd->lgr_lock); + list_splice_init(&smcd->lgr_list, &lgr_free_list); + list_for_each_entry(lgr, &lgr_free_list, list) + lgr->freeing = 1; + spin_unlock_bh(&smcd->lgr_lock); + + list_for_each_entry_safe(lgr, lg, &lgr_free_list, list) { + list_del_init(&lgr->list); + __smc_lgr_terminate(lgr, false); + } +} + /* Determine vlan of internal TCP socket. * @vlan_id: address to store the determined vlan id into */ @@ -1173,8 +1204,8 @@ static void smc_core_going_away(void) spin_unlock(&smcd_dev_list.lock); } -/* Called (from smc_exit) when module is removed */ -void smc_core_exit(void) +/* Clean up all SMC link groups */ +static void smc_lgrs_shutdown(void) { struct smc_link_group *lgr, *lg; LIST_HEAD(lgr_freeing_list); @@ -1188,7 +1219,7 @@ void smc_core_exit(void) spin_lock(&smcd_dev_list.lock); list_for_each_entry(smcd, &smcd_dev_list.list, list) - list_splice_init(&smcd->lgr_list, &lgr_freeing_list); + smc_smcd_terminate_all(smcd); spin_unlock(&smcd_dev_list.lock); list_for_each_entry_safe(lgr, lg, &lgr_freeing_list, list) { @@ -1202,8 +1233,12 @@ void smc_core_exit(void) smc_llc_link_inactive(lnk); } cancel_delayed_work_sync(&lgr->free_work); - if (lgr->is_smcd) - smc_ism_signal_shutdown(lgr); smc_lgr_free(lgr); /* free link group */ } } + +/* Called (from smc_exit) when module is removed */ +void smc_core_exit(void) +{ + smc_lgrs_shutdown(); +} diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index 097ceba86caf..7f34f4d5a514 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -296,10 +296,11 @@ struct smc_clc_msg_accept_confirm; struct smc_clc_msg_local; void smc_lgr_forget(struct smc_link_group *lgr); -void smc_lgr_terminate(struct smc_link_group *lgr); +void smc_lgr_terminate(struct smc_link_group *lgr, bool soft); void smc_port_terminate(struct smc_ib_device *smcibdev, u8 ibport); void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid, unsigned short vlan); +void smc_smcd_terminate_all(struct smcd_dev *dev); int smc_buf_create(struct smc_sock *smc, bool is_smcd); int smc_uncompress_bufsize(u8 compressed); int smc_rmb_rtoken_handling(struct smc_connection *conn, diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c index 903da947b20d..56cdab8be1fa 100644 --- a/net/smc/smc_ism.c +++ b/net/smc/smc_ism.c @@ -329,7 +329,7 @@ void smcd_unregister_dev(struct smcd_dev *smcd) list_del_init(&smcd->list); spin_unlock(&smcd_dev_list.lock); smcd->going_away = 1; - smc_smcd_terminate(smcd, 0, VLAN_VID_MASK); + smc_smcd_terminate_all(smcd); flush_workqueue(smcd->event_wq); destroy_workqueue(smcd->event_wq); diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index e1918ffaf125..26a18c872455 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -614,7 +614,7 @@ static void smc_llc_testlink_work(struct work_struct *work) rc = wait_for_completion_interruptible_timeout(&link->llc_testlink_resp, SMC_LLC_WAIT_TIME); if (rc <= 0) { - smc_lgr_terminate(smc_get_lgr(link)); + smc_lgr_terminate(smc_get_lgr(link), true); return; } next_interval = link->llc_testlink_time; diff --git a/net/smc/smc_tx.c b/net/smc/smc_tx.c index 824f096ee7de..0d42e7716b91 100644 --- a/net/smc/smc_tx.c +++ b/net/smc/smc_tx.c @@ -284,7 +284,7 @@ static int smc_tx_rdma_write(struct smc_connection *conn, int peer_rmbe_offset, rdma_wr->rkey = lgr->rtokens[conn->rtoken_idx][SMC_SINGLE_LINK].rkey; rc = ib_post_send(link->roce_qp, &rdma_wr->wr, NULL); if (rc) - smc_lgr_terminate(lgr); + smc_lgr_terminate(lgr, true); return rc; } |