From 3eddc569770a76f2ca65621cdde3c0a2552b5b0c Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 15 Aug 2008 10:59:21 -0500 Subject: [SCSI] ibmvfc: Fix another hang on module removal This fixes a hang on module removal. The module removal code was setting the hosts's state to IBMVFC_HOST_OFFLINE before tearing down the kernel thread, but, due to a bug in ibmvfc_wait_while_resetting, was not waiting for the kernel thread's offlining work to be done prior to destroying the kernel thread, which left the scsi host in a blocked state which we never got out of. Signed-off-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ibmvscsi/ibmvfc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/scsi/ibmvscsi/ibmvfc.c') diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index ae560bc04f9d..ee11568d581f 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -1059,9 +1059,10 @@ static void ibmvfc_get_starget_port_id(struct scsi_target *starget) static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) { long timeout = wait_event_timeout(vhost->init_wait_q, - (vhost->state == IBMVFC_ACTIVE || - vhost->state == IBMVFC_HOST_OFFLINE || - vhost->state == IBMVFC_LINK_DEAD), + ((vhost->state == IBMVFC_ACTIVE || + vhost->state == IBMVFC_HOST_OFFLINE || + vhost->state == IBMVFC_LINK_DEAD) && + vhost->action == IBMVFC_HOST_ACTION_NONE), (init_timeout * HZ)); return timeout ? 0 : -EIO; -- cgit v1.2.1 From 915be024414c52e311f795566ac938223ba3c847 Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 15 Aug 2008 10:59:22 -0500 Subject: [SCSI] ibmvfc: Fixup host state during reinit If an ELS is received while the virtual fibre channel adapter is going through its discovery, a flag is set which causes discovery to get re-driven. However, the hosts's state does not get set back to IBMVFC_INITIALIZING and scsi_block_requests does not get called again, which can result in queuecommand ops getting sent during discovery. This should not occur and may cause problems. One example is that we may no longer be logged into the target we send the command to, resulting in a failure which should not have occurred. Signed-off-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ibmvscsi/ibmvfc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/ibmvscsi/ibmvfc.c') diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index ee11568d581f..406ab27f80e9 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -3602,8 +3602,9 @@ static void ibmvfc_do_work(struct ibmvfc_host *vhost) } } - if (vhost->reinit) { + if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { vhost->reinit = 0; + scsi_block_requests(vhost->host); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); } else { ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); -- cgit v1.2.1 From cf6f10d794ab4a9bd84fce345c3947588670d5f5 Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 15 Aug 2008 10:59:23 -0500 Subject: [SCSI] ibmvfc: Fix for lost async events If the client virtual fibre channel adapter is already logged into the server and does an NPIV Login again, the async queue, which is used for reporting Link Up/Link Down type of events, does not get reset on the server side. Fix up the client driver so that we also do not reset it. This fixes a problem of lost async events following relogins. Signed-off-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ibmvscsi/ibmvfc.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) (limited to 'drivers/scsi/ibmvscsi/ibmvfc.c') diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index 406ab27f80e9..58f8c9e39ae8 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -556,11 +556,12 @@ static void ibmvfc_link_down(struct ibmvfc_host *vhost, /** * ibmvfc_init_host - Start host initialization * @vhost: ibmvfc host struct + * @relogin: is this a re-login? * * Return value: * nothing **/ -static void ibmvfc_init_host(struct ibmvfc_host *vhost) +static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) { struct ibmvfc_target *tgt; @@ -574,6 +575,11 @@ static void ibmvfc_init_host(struct ibmvfc_host *vhost) } if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { + if (!relogin) { + memset(vhost->async_crq.msgs, 0, PAGE_SIZE); + vhost->async_crq.cur = 0; + } + list_for_each_entry(tgt, &vhost->targets, queue) tgt->need_login = 1; scsi_block_requests(vhost->host); @@ -2084,11 +2090,11 @@ static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, case IBMVFC_AE_LINK_UP: case IBMVFC_AE_RESUME: vhost->events_to_log |= IBMVFC_AE_LINKUP; - ibmvfc_init_host(vhost); + ibmvfc_init_host(vhost, 1); break; case IBMVFC_AE_SCN_FABRIC: vhost->events_to_log |= IBMVFC_AE_RSCN; - ibmvfc_init_host(vhost); + ibmvfc_init_host(vhost, 1); break; case IBMVFC_AE_SCN_NPORT: case IBMVFC_AE_SCN_GROUP: @@ -2134,13 +2140,13 @@ static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) /* Send back a response */ rc = ibmvfc_send_crq_init_complete(vhost); if (rc == 0) - ibmvfc_init_host(vhost); + ibmvfc_init_host(vhost, 0); else dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); break; case IBMVFC_CRQ_INIT_COMPLETE: dev_info(vhost->dev, "Partner initialization complete\n"); - ibmvfc_init_host(vhost); + ibmvfc_init_host(vhost, 0); break; default: dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); @@ -3358,8 +3364,6 @@ static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) mad->buffer.va = vhost->login_buf_dma; mad->buffer.len = sizeof(*vhost->login_buf); - memset(vhost->async_crq.msgs, 0, PAGE_SIZE); - vhost->async_crq.cur = 0; ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); if (!ibmvfc_send_event(evt, vhost, default_timeout)) -- cgit v1.2.1 From 2bac406df52100aec42e230a2cc2986d34e86218 Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 15 Aug 2008 10:59:26 -0500 Subject: [SCSI] ibmvfc: Sanitize response lengths Sanitize the response lengths in order to prevent possible oopses in the command response path. Signed-off-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ibmvscsi/ibmvfc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/scsi/ibmvscsi/ibmvfc.c') diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index 58f8c9e39ae8..6ecc0ddd4440 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -1457,8 +1457,8 @@ static void ibmvfc_scsi_done(struct ibmvfc_event *evt) struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; struct scsi_cmnd *cmnd = evt->cmnd; - int rsp_len = 0; - int sense_len = rsp->fcp_sense_len; + u32 rsp_len = 0; + u32 sense_len = rsp->fcp_sense_len; if (cmnd) { if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) @@ -1475,7 +1475,7 @@ static void ibmvfc_scsi_done(struct ibmvfc_event *evt) rsp_len = rsp->fcp_rsp_len; if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; - if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len) + if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); ibmvfc_log_error(evt); -- cgit v1.2.1 From 3e3399467d4c4aefe6a24225b5b277cf7d6e58a7 Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 15 Aug 2008 10:59:27 -0500 Subject: [SCSI] ibmvfc: Add details to async event log When logging async events, also print the payload in addition to the event received. Signed-off-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ibmvscsi/ibmvfc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/ibmvscsi/ibmvfc.c') diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index 6ecc0ddd4440..4e0b7c8eb32e 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -2084,7 +2084,8 @@ static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, { const char *desc = ibmvfc_get_ae_desc(crq->event); - ibmvfc_log(vhost, 3, "%s event received\n", desc); + ibmvfc_log(vhost, 3, "%s event received. scsi_id: %lx, wwpn: %lx," + " node_name: %lx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); switch (crq->event) { case IBMVFC_AE_LINK_UP: -- cgit v1.2.1