From 33dd6f92a1a7ad85c54d47fd9d73371a32c0bde4 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Fri, 20 Feb 2009 06:53:48 -0700 Subject: [SCSI] sd: Don't try to spin up drives that are connected to an inactive port We currently try to spin up drives connected to standby and unavailable ports. This will never succeed and wastes a lot of time. Fail quickly if the sense data reports the port is in standby or unavailable state. Reported-by: Narayanan Rengarajan Tested-by: Narayanan Rengarajan Signed-off-by: Matthew Wilcox Signed-off-by: James Bottomley --- drivers/scsi/sd.c | 26 +++++++++++--------------- 1 file changed, 11 insertions(+), 15 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 55310dbc10a..4970ae4a62d 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1167,23 +1167,19 @@ sd_spinup_disk(struct scsi_disk *sdkp) /* * The device does not want the automatic start to be issued. */ - if (sdkp->device->no_start_on_add) { + if (sdkp->device->no_start_on_add) break; - } - - /* - * If manual intervention is required, or this is an - * absent USB storage device, a spinup is meaningless. - */ - if (sense_valid && - sshdr.sense_key == NOT_READY && - sshdr.asc == 4 && sshdr.ascq == 3) { - break; /* manual intervention required */ - /* - * Issue command to spin up drive when not ready - */ - } else if (sense_valid && sshdr.sense_key == NOT_READY) { + if (sense_valid && sshdr.sense_key == NOT_READY) { + if (sshdr.asc == 4 && sshdr.ascq == 3) + break; /* manual intervention required */ + if (sshdr.asc == 4 && sshdr.ascq == 0xb) + break; /* standby */ + if (sshdr.asc == 4 && sshdr.ascq == 0xc) + break; /* unavailable */ + /* + * Issue command to spin up drive when not ready + */ if (!spintime) { sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); cmd[0] = START_STOP; -- cgit v1.2.3-18-g5258 From 1f6ff364ceda516f88351a8ab640e656beed0b26 Mon Sep 17 00:00:00 2001 From: Abhijeet Joglekar Date: Fri, 27 Feb 2009 10:54:35 -0800 Subject: [SCSI] libfc: Pass lport in exch_mgr_reset fc_exch_mgr structure is private to fc_exch.c. To export exch_mgr_reset to transport, transport needs access to the exch manager. Change exch_mgr_reset to use lport param which is the shared structure between libFC and transport. Alternatively, fc_exch_mgr definition can be moved to libfc.h so that lport can be accessed from mp*. Signed-off-by: Abhijeet Joglekar Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_exch.c | 3 ++- drivers/scsi/libfc/fc_lport.c | 4 ++-- drivers/scsi/libfc/fc_rport.c | 4 ++-- 3 files changed, 6 insertions(+), 5 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c index 66db08a5f27..a09416fd843 100644 --- a/drivers/scsi/libfc/fc_exch.c +++ b/drivers/scsi/libfc/fc_exch.c @@ -1480,10 +1480,11 @@ static void fc_exch_reset(struct fc_exch *ep) * If sid is non-zero, reset only exchanges we source from that FID. * If did is non-zero, reset only exchanges destined to that FID. */ -void fc_exch_mgr_reset(struct fc_exch_mgr *mp, u32 sid, u32 did) +void fc_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) { struct fc_exch *ep; struct fc_exch *next; + struct fc_exch_mgr *mp = lp->emp; spin_lock_bh(&mp->em_lock); restart: diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c index 0b9bdb1fb80..5db223ce3b2 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -663,7 +663,7 @@ int fc_lport_destroy(struct fc_lport *lport) { lport->tt.frame_send = fc_frame_drop; lport->tt.fcp_abort_io(lport); - lport->tt.exch_mgr_reset(lport->emp, 0, 0); + lport->tt.exch_mgr_reset(lport, 0, 0); return 0; } EXPORT_SYMBOL(fc_lport_destroy); @@ -973,7 +973,7 @@ static void fc_lport_enter_reset(struct fc_lport *lport) lport->tt.disc_stop(lport); - lport->tt.exch_mgr_reset(lport->emp, 0, 0); + lport->tt.exch_mgr_reset(lport, 0, 0); fc_host_fabric_name(lport->host) = 0; fc_host_port_id(lport->host) = 0; diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c index e780d8caf70..dec7bae0e56 100644 --- a/drivers/scsi/libfc/fc_rport.c +++ b/drivers/scsi/libfc/fc_rport.c @@ -1285,7 +1285,7 @@ void fc_rport_terminate_io(struct fc_rport *rport) struct fc_rport_libfc_priv *rdata = rport->dd_data; struct fc_lport *lport = rdata->local_port; - lport->tt.exch_mgr_reset(lport->emp, 0, rport->port_id); - lport->tt.exch_mgr_reset(lport->emp, rport->port_id, 0); + lport->tt.exch_mgr_reset(lport, 0, rport->port_id); + lport->tt.exch_mgr_reset(lport, rport->port_id, 0); } EXPORT_SYMBOL(fc_rport_terminate_io); -- cgit v1.2.3-18-g5258 From 571f824c3cd7b7f5a40ba100f7e576b6b0fe826a Mon Sep 17 00:00:00 2001 From: Abhijeet Joglekar Date: Fri, 27 Feb 2009 10:54:41 -0800 Subject: [SCSI] libfc: when rport goes away (re-plogi), clean up exchanges to/from rport When a rport goes away, libFC does a plogi which will reset exchanges at the rport. Clean exchanges at our end, both in transport and libFC. If transport hooks into exch_mgr_reset, it will call back into fc_exch_mgr_reset() to clean up libFC exchanges. Signed-off-by: Abhijeet Joglekar Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_rport.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c index dec7bae0e56..71757593415 100644 --- a/drivers/scsi/libfc/fc_rport.c +++ b/drivers/scsi/libfc/fc_rport.c @@ -214,6 +214,7 @@ static void fc_rport_state_enter(struct fc_rport *rport, static void fc_rport_work(struct work_struct *work) { + u32 port_id; struct fc_rport_libfc_priv *rdata = container_of(work, struct fc_rport_libfc_priv, event_work); enum fc_rport_event event; @@ -279,8 +280,12 @@ static void fc_rport_work(struct work_struct *work) rport_ops->event_callback(lport, rport, event); if (trans_state == FC_PORTSTATE_ROGUE) put_device(&rport->dev); - else + else { + port_id = rport->port_id; fc_remote_port_delete(rport); + lport->tt.exch_mgr_reset(lport, 0, port_id); + lport->tt.exch_mgr_reset(lport, port_id, 0); + } } else mutex_unlock(&rdata->rp_mutex); } -- cgit v1.2.3-18-g5258 From 78342da3682ec843e3e6301af5c723c88a46c408 Mon Sep 17 00:00:00 2001 From: Vasu Dev Date: Fri, 27 Feb 2009 10:54:46 -0800 Subject: [SCSI] libfc: handle RRQ exch timeout Cleanup exchange held due to RRQ when RRQ exch times out, in this case the ABTS is already done causing RRQ req therefore proceeding with cleanup in fc_exch_rrq_resp should be okay to restore exch resource. Signed-off-by: Vasu Dev Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_exch.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c index a09416fd843..e874e77b740 100644 --- a/drivers/scsi/libfc/fc_exch.c +++ b/drivers/scsi/libfc/fc_exch.c @@ -1608,7 +1608,7 @@ static void fc_exch_rrq_resp(struct fc_seq *sp, struct fc_frame *fp, void *arg) if (IS_ERR(fp)) { int err = PTR_ERR(fp); - if (err == -FC_EX_CLOSED) + if (err == -FC_EX_CLOSED || err == -FC_EX_TIMEOUT) goto cleanup; FC_DBG("Cannot process RRQ, because of frame error %d\n", err); return; -- cgit v1.2.3-18-g5258 From a7e84f2b83f17f8f11da34ccef3ba5a862dc0182 Mon Sep 17 00:00:00 2001 From: Vasu Dev Date: Fri, 27 Feb 2009 10:54:51 -0800 Subject: [SCSI] libfc: fixed a soft lockup issue in fc_exch_recv_abts The fc_seq_start_next grabs ep->ex_lock but this lock was already held here, so instead called fc_seq_start_next_locked to avoid soft lockup. Signed-off-by: Vasu Dev Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_exch.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c index e874e77b740..dd269e5f953 100644 --- a/drivers/scsi/libfc/fc_exch.c +++ b/drivers/scsi/libfc/fc_exch.c @@ -1096,7 +1096,7 @@ static void fc_exch_recv_abts(struct fc_exch *ep, struct fc_frame *rx_fp) ap->ba_high_seq_cnt = fh->fh_seq_cnt; ap->ba_low_seq_cnt = htons(sp->cnt); } - sp = fc_seq_start_next(sp); + sp = fc_seq_start_next_locked(sp); spin_unlock_bh(&ep->ex_lock); fc_seq_send_last(sp, fp, FC_RCTL_BA_ACC, FC_TYPE_BLS); fc_frame_free(rx_fp); -- cgit v1.2.3-18-g5258 From bc0e17f691085315ae9303eb5b0883fe16dfe6b1 Mon Sep 17 00:00:00 2001 From: Vasu Dev Date: Fri, 27 Feb 2009 10:54:57 -0800 Subject: [SCSI] libfc, fcoe: fixed locking issues with lport->lp_mutex around lport->link_status The fcoe_xmit could call fc_pause in case the pending skb queue len is larger than FCOE_MAX_QUEUE_DEPTH, the fc_pause was trying to grab lport->lp_muex to change lport->link_status and that had these issues :- 1. The fcoe_xmit was getting called with bh disabled, thus causing "BUG: scheduling while atomic" when grabbing lport->lp_muex with bh disabled. 2. fc_linkup and fc_linkdown function calls lport_enter function with lport->lp_mutex held and these enter function in turn calls fcoe_xmit to send lport related FC frame, e.g. fc_linkup => fc_lport_enter_flogi to send flogi req. In this case grabbing the same lport->lp_mutex again in fc_puase from fcoe_xmit would cause deadlock. The lport->lp_mutex was used for setting FC_PAUSE in fcoe_xmit path but FC_PAUSE bit was not used anywhere beside just setting and clear this bit in lport->link_status, instead used a separate field qfull in fc_lport to eliminate need for lport->lp_mutex to track pending queue full condition and in turn avoid above described two locking issues. Also added check for lp->qfull in fc_fcp_lport_queue_ready to trigger SCSI_MLQUEUE_HOST_BUSY when lp->qfull is set to prevent more scsi-ml cmds while lp->qfull is set. This patch eliminated FC_LINK_UP and FC_PAUSE and instead used dedicated fields in fc_lport for this, this simplified all related conditional code. Also removed fc_pause and fc_unpause functions and instead used newly added lport->qfull directly in fcoe. Signed-off-by: Vasu Dev Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/fcoe/fcoe_sw.c | 6 +++--- drivers/scsi/fcoe/libfcoe.c | 41 +++++++++++++++++------------------------ drivers/scsi/libfc/fc_fcp.c | 4 ++-- drivers/scsi/libfc/fc_lport.c | 36 ++++++------------------------------ 4 files changed, 28 insertions(+), 59 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/fcoe/fcoe_sw.c b/drivers/scsi/fcoe/fcoe_sw.c index dc4cd5e2576..cf83675a0fb 100644 --- a/drivers/scsi/fcoe/fcoe_sw.c +++ b/drivers/scsi/fcoe/fcoe_sw.c @@ -116,7 +116,8 @@ static int fcoe_sw_lport_config(struct fc_lport *lp) { int i = 0; - lp->link_status = 0; + lp->link_up = 0; + lp->qfull = 0; lp->max_retry_count = 3; lp->e_d_tov = 2 * 1000; /* FC-FS default */ lp->r_a_tov = 2 * 2 * 1000; @@ -181,9 +182,8 @@ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev) if (fc_set_mfs(lp, mfs)) return -EINVAL; - lp->link_status = ~FC_PAUSE & ~FC_LINK_UP; if (!fcoe_link_ok(lp)) - lp->link_status |= FC_LINK_UP; + lp->link_up = 1; /* offload features support */ if (fc->real_dev->features & NETIF_F_SG) diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c index e419f486cdb..296071043f5 100644 --- a/drivers/scsi/fcoe/libfcoe.c +++ b/drivers/scsi/fcoe/libfcoe.c @@ -504,7 +504,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) if (rc) { fcoe_insert_wait_queue(lp, skb); if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) - fc_pause(lp); + lp->qfull = 1; } return 0; @@ -718,7 +718,7 @@ static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa) * fcoe_watchdog - fcoe timer callback * @vp: * - * This checks the pending queue length for fcoe and put fcoe to be paused state + * This checks the pending queue length for fcoe and set lport qfull * if the FCOE_MAX_QUEUE_DEPTH is reached. This is done for all fc_lport on the * fcoe_hostlist. * @@ -728,17 +728,17 @@ void fcoe_watchdog(ulong vp) { struct fc_lport *lp; struct fcoe_softc *fc; - int paused = 0; + int qfilled = 0; read_lock(&fcoe_hostlist_lock); list_for_each_entry(fc, &fcoe_hostlist, list) { lp = fc->lp; if (lp) { if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) - paused = 1; + qfilled = 1; if (fcoe_check_wait_queue(lp) < FCOE_MAX_QUEUE_DEPTH) { - if (paused) - fc_unpause(lp); + if (qfilled) + lp->qfull = 0; } } } @@ -767,8 +767,7 @@ void fcoe_watchdog(ulong vp) **/ static int fcoe_check_wait_queue(struct fc_lport *lp) { - int rc, unpause = 0; - int paused = 0; + int rc; struct sk_buff *skb; struct fcoe_softc *fc; @@ -776,10 +775,10 @@ static int fcoe_check_wait_queue(struct fc_lport *lp) spin_lock_bh(&fc->fcoe_pending_queue.lock); /* - * is this interface paused? + * if interface pending queue full then set qfull in lport. */ if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) - paused = 1; + lp->qfull = 1; if (fc->fcoe_pending_queue.qlen) { while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) { spin_unlock_bh(&fc->fcoe_pending_queue.lock); @@ -791,11 +790,9 @@ static int fcoe_check_wait_queue(struct fc_lport *lp) spin_lock_bh(&fc->fcoe_pending_queue.lock); } if (fc->fcoe_pending_queue.qlen < FCOE_MAX_QUEUE_DEPTH) - unpause = 1; + lp->qfull = 0; } spin_unlock_bh(&fc->fcoe_pending_queue.lock); - if ((unpause) && (paused)) - fc_unpause(lp); return fc->fcoe_pending_queue.qlen; } @@ -873,7 +870,7 @@ static int fcoe_device_notification(struct notifier_block *notifier, struct net_device *real_dev = ptr; struct fcoe_softc *fc; struct fcoe_dev_stats *stats; - u16 new_status; + u32 new_link_up; u32 mfs; int rc = NOTIFY_OK; @@ -890,17 +887,15 @@ static int fcoe_device_notification(struct notifier_block *notifier, goto out; } - new_status = lp->link_status; + new_link_up = lp->link_up; switch (event) { case NETDEV_DOWN: case NETDEV_GOING_DOWN: - new_status &= ~FC_LINK_UP; + new_link_up = 0; break; case NETDEV_UP: case NETDEV_CHANGE: - new_status &= ~FC_LINK_UP; - if (!fcoe_link_ok(lp)) - new_status |= FC_LINK_UP; + new_link_up = !fcoe_link_ok(lp); break; case NETDEV_CHANGEMTU: mfs = fc->real_dev->mtu - @@ -908,17 +903,15 @@ static int fcoe_device_notification(struct notifier_block *notifier, sizeof(struct fcoe_crc_eof)); if (mfs >= FC_MIN_MAX_FRAME) fc_set_mfs(lp, mfs); - new_status &= ~FC_LINK_UP; - if (!fcoe_link_ok(lp)) - new_status |= FC_LINK_UP; + new_link_up = !fcoe_link_ok(lp); break; case NETDEV_REGISTER: break; default: FC_DBG("unknown event %ld call", event); } - if (lp->link_status != new_status) { - if ((new_status & FC_LINK_UP) == FC_LINK_UP) + if (lp->link_up != new_link_up) { + if (new_link_up) fc_linkup(lp); else { stats = lp->dev_stats[smp_processor_id()]; diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c index 404e63ff46b..f440aaca39c 100644 --- a/drivers/scsi/libfc/fc_fcp.c +++ b/drivers/scsi/libfc/fc_fcp.c @@ -1621,7 +1621,7 @@ out: static inline int fc_fcp_lport_queue_ready(struct fc_lport *lp) { /* lock ? */ - return (lp->state == LPORT_ST_READY) && (lp->link_status & FC_LINK_UP); + return (lp->state == LPORT_ST_READY) && lp->link_up && !lp->qfull; } /** @@ -1890,7 +1890,7 @@ int fc_eh_abort(struct scsi_cmnd *sc_cmd) lp = shost_priv(sc_cmd->device->host); if (lp->state != LPORT_ST_READY) return rc; - else if (!(lp->link_status & FC_LINK_UP)) + else if (!lp->link_up) return rc; spin_lock_irqsave(lp->host->host_lock, flags); diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c index 5db223ce3b2..a6ab692f5f5 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -250,7 +250,7 @@ void fc_get_host_port_state(struct Scsi_Host *shost) { struct fc_lport *lp = shost_priv(shost); - if ((lp->link_status & FC_LINK_UP) == FC_LINK_UP) + if (lp->link_up) fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; else fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; @@ -577,8 +577,8 @@ void fc_linkup(struct fc_lport *lport) fc_host_port_id(lport->host)); mutex_lock(&lport->lp_mutex); - if ((lport->link_status & FC_LINK_UP) != FC_LINK_UP) { - lport->link_status |= FC_LINK_UP; + if (!lport->link_up) { + lport->link_up = 1; if (lport->state == LPORT_ST_RESET) fc_lport_enter_flogi(lport); @@ -597,8 +597,8 @@ void fc_linkdown(struct fc_lport *lport) FC_DEBUG_LPORT("Link is down for port (%6x)\n", fc_host_port_id(lport->host)); - if ((lport->link_status & FC_LINK_UP) == FC_LINK_UP) { - lport->link_status &= ~(FC_LINK_UP); + if (lport->link_up) { + lport->link_up = 0; fc_lport_enter_reset(lport); lport->tt.fcp_cleanup(lport); } @@ -606,30 +606,6 @@ void fc_linkdown(struct fc_lport *lport) } EXPORT_SYMBOL(fc_linkdown); -/** - * fc_pause - Pause the flow of frames - * @lport: The lport to be paused - */ -void fc_pause(struct fc_lport *lport) -{ - mutex_lock(&lport->lp_mutex); - lport->link_status |= FC_PAUSE; - mutex_unlock(&lport->lp_mutex); -} -EXPORT_SYMBOL(fc_pause); - -/** - * fc_unpause - Unpause the flow of frames - * @lport: The lport to be unpaused - */ -void fc_unpause(struct fc_lport *lport) -{ - mutex_lock(&lport->lp_mutex); - lport->link_status &= ~(FC_PAUSE); - mutex_unlock(&lport->lp_mutex); -} -EXPORT_SYMBOL(fc_unpause); - /** * fc_fabric_logoff - Logout of the fabric * @lport: fc_lport pointer to logoff the fabric @@ -977,7 +953,7 @@ static void fc_lport_enter_reset(struct fc_lport *lport) fc_host_fabric_name(lport->host) = 0; fc_host_port_id(lport->host) = 0; - if ((lport->link_status & FC_LINK_UP) == FC_LINK_UP) + if (lport->link_up) fc_lport_enter_flogi(lport); } -- cgit v1.2.3-18-g5258 From 6755db1cd4587084be85f860b7aa7c0cc9d776dc Mon Sep 17 00:00:00 2001 From: Chris Leech Date: Fri, 27 Feb 2009 10:55:02 -0800 Subject: [SCSI] libfc: rport retry on LS_RJT from certain ELS This allows any rport ELS to retry on LS_RJT. The rport error handling would only retry on resource allocation failures and exchange timeouts. I have a target that will occasionally reject PLOGI when we do a quick LOGO/PLOGI. When a critical ELS was rejected, libfc would fail silently leaving the rport in a dead state. The retry count and delay are managed by fc_rport_error_retry. If the retry count is exceeded fc_rport_error will be called. When retrying is not the correct course of action, fc_rport_error can be called directly. Signed-off-by: Chris Leech Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_exch.c | 2 - drivers/scsi/libfc/fc_rport.c | 111 ++++++++++++++++++++++++------------------ 2 files changed, 64 insertions(+), 49 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c index dd269e5f953..8c4018956d4 100644 --- a/drivers/scsi/libfc/fc_exch.c +++ b/drivers/scsi/libfc/fc_exch.c @@ -32,8 +32,6 @@ #include #include -#define FC_DEF_R_A_TOV (10 * 1000) /* resource allocation timeout */ - /* * fc_exch_debug can be set in debugger or at compile time to get more logs. */ diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c index 71757593415..600a8fffa94 100644 --- a/drivers/scsi/libfc/fc_rport.c +++ b/drivers/scsi/libfc/fc_rport.c @@ -81,6 +81,7 @@ static void fc_rport_recv_logo_req(struct fc_rport *, struct fc_seq *, struct fc_frame *); static void fc_rport_timeout(struct work_struct *); static void fc_rport_error(struct fc_rport *, struct fc_frame *); +static void fc_rport_error_retry(struct fc_rport *, struct fc_frame *); static void fc_rport_work(struct work_struct *); static const char *fc_rport_state_names[] = { @@ -410,57 +411,73 @@ static void fc_rport_timeout(struct work_struct *work) } /** - * fc_rport_error - Handler for any errors + * fc_rport_error - Error handler, called once retries have been exhausted * @rport: The fc_rport object * @fp: The frame pointer * - * If the error was caused by a resource allocation failure - * then wait for half a second and retry, otherwise retry - * immediately. - * * Locking Note: The rport lock is expected to be held before * calling this routine */ static void fc_rport_error(struct fc_rport *rport, struct fc_frame *fp) { struct fc_rport_libfc_priv *rdata = rport->dd_data; - unsigned long delay = 0; FC_DEBUG_RPORT("Error %ld in state %s, retries %d\n", PTR_ERR(fp), fc_rport_state(rport), rdata->retries); - if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { - /* - * Memory allocation failure, or the exchange timed out. - * Retry after delay - */ - if (rdata->retries < rdata->local_port->max_retry_count) { - rdata->retries++; - if (!fp) - delay = msecs_to_jiffies(500); - get_device(&rport->dev); - schedule_delayed_work(&rdata->retry_work, delay); - } else { - switch (rdata->rp_state) { - case RPORT_ST_PLOGI: - case RPORT_ST_PRLI: - case RPORT_ST_LOGO: - rdata->event = RPORT_EV_FAILED; - queue_work(rport_event_queue, - &rdata->event_work); - break; - case RPORT_ST_RTV: - fc_rport_enter_ready(rport); - break; - case RPORT_ST_NONE: - case RPORT_ST_READY: - case RPORT_ST_INIT: - break; - } - } + switch (rdata->rp_state) { + case RPORT_ST_PLOGI: + case RPORT_ST_PRLI: + case RPORT_ST_LOGO: + rdata->event = RPORT_EV_FAILED; + queue_work(rport_event_queue, + &rdata->event_work); + break; + case RPORT_ST_RTV: + fc_rport_enter_ready(rport); + break; + case RPORT_ST_NONE: + case RPORT_ST_READY: + case RPORT_ST_INIT: + break; } } +/** + * fc_rport_error_retry - Error handler when retries are desired + * @rport: The fc_rport object + * @fp: The frame pointer + * + * If the error was an exchange timeout retry immediately, + * otherwise wait for E_D_TOV. + * + * Locking Note: The rport lock is expected to be held before + * calling this routine + */ +static void fc_rport_error_retry(struct fc_rport *rport, struct fc_frame *fp) +{ + struct fc_rport_libfc_priv *rdata = rport->dd_data; + unsigned long delay = FC_DEF_E_D_TOV; + + /* make sure this isn't an FC_EX_CLOSED error, never retry those */ + if (PTR_ERR(fp) == -FC_EX_CLOSED) + return fc_rport_error(rport, fp); + + if (rdata->retries < rdata->local_port->max_retry_count) { + FC_DEBUG_RPORT("Error %ld in state %s, retrying\n", + PTR_ERR(fp), fc_rport_state(rport)); + rdata->retries++; + /* no additional delay on exchange timeouts */ + if (PTR_ERR(fp) == -FC_EX_TIMEOUT) + delay = 0; + get_device(&rport->dev); + schedule_delayed_work(&rdata->retry_work, delay); + return; + } + + return fc_rport_error(rport, fp); +} + /** * fc_rport_plogi_recv_resp - Handle incoming ELS PLOGI response * @sp: current sequence in the PLOGI exchange @@ -495,7 +512,7 @@ static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, } if (IS_ERR(fp)) { - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); goto err; } @@ -527,7 +544,7 @@ static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, else fc_rport_enter_prli(rport); } else - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); out: fc_frame_free(fp); @@ -557,14 +574,14 @@ static void fc_rport_enter_plogi(struct fc_rport *rport) rport->maxframe_size = FC_MIN_MAX_PAYLOAD; fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); if (!fp) { - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); return; } rdata->e_d_tov = lport->e_d_tov; if (!lport->tt.elsct_send(lport, rport, fp, ELS_PLOGI, fc_rport_plogi_resp, rport, lport->e_d_tov)) - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); else get_device(&rport->dev); } @@ -604,7 +621,7 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, } if (IS_ERR(fp)) { - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); goto err; } @@ -662,7 +679,7 @@ static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, rport->port_id); if (IS_ERR(fp)) { - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); goto err; } @@ -712,13 +729,13 @@ static void fc_rport_enter_prli(struct fc_rport *rport) fp = fc_frame_alloc(lport, sizeof(*pp)); if (!fp) { - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); return; } if (!lport->tt.elsct_send(lport, rport, fp, ELS_PRLI, fc_rport_prli_resp, rport, lport->e_d_tov)) - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); else get_device(&rport->dev); } @@ -809,13 +826,13 @@ static void fc_rport_enter_rtv(struct fc_rport *rport) fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); if (!fp) { - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); return; } if (!lport->tt.elsct_send(lport, rport, fp, ELS_RTV, fc_rport_rtv_resp, rport, lport->e_d_tov)) - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); else get_device(&rport->dev); } @@ -840,13 +857,13 @@ static void fc_rport_enter_logo(struct fc_rport *rport) fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); if (!fp) { - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); return; } if (!lport->tt.elsct_send(lport, rport, fp, ELS_LOGO, fc_rport_logo_resp, rport, lport->e_d_tov)) - fc_rport_error(rport, fp); + fc_rport_error_retry(rport, fp); else get_device(&rport->dev); } -- cgit v1.2.3-18-g5258 From 26d9cab558f901051d0b69b2c445c8588931ce8d Mon Sep 17 00:00:00 2001 From: Vasu Dev Date: Fri, 27 Feb 2009 10:55:07 -0800 Subject: [SCSI] libfc: fixed a read IO data integrity issue when a IO data frame lost The fc_fcp_complete_locked detected data underrun in this case and set the FC_DATA_UNDRUN but that was ignored by fc_io_compl for all cases including read underrun. Added code to not to ignore FC_DATA_UNDRUN for read IO and instead suggested scsi-ml to retry cmd to recover from lost data frame. Not sure if it is okay to ignore FC_DATA_UNDRUN for other case, so let code as is for other cases but removed or-ing with zero valued fsp->cdb_status for those cases. Signed-off-by: Vasu Dev Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_fcp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c index f440aaca39c..ecc72612c38 100644 --- a/drivers/scsi/libfc/fc_fcp.c +++ b/drivers/scsi/libfc/fc_fcp.c @@ -1810,12 +1810,12 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp) sc_cmd->result = DID_ERROR << 16; break; case FC_DATA_UNDRUN: - if (fsp->cdb_status == 0) { + if ((fsp->cdb_status == 0) && !(fsp->req_flags & FC_SRB_READ)) { /* * scsi status is good but transport level - * underrun. for read it should be an error?? + * underrun. */ - sc_cmd->result = (DID_OK << 16) | fsp->cdb_status; + sc_cmd->result = DID_OK << 16; } else { /* * scsi got underrun, this is an error -- cgit v1.2.3-18-g5258 From f7db2c150cf5082cf74555f30a1305938041de80 Mon Sep 17 00:00:00 2001 From: Steve Ma Date: Fri, 27 Feb 2009 10:55:13 -0800 Subject: [SCSI] libfc: exch mgr is freed while lport still retrying sequences When a sequence cannot be delivered to the target, the local port will schedule retries, While this process is in progress, if we destroy the FCoE interface, the fcoe_sw_destroy routine is entered, and the fc_exch_mgr_free(lp->emp) is called. Thus if fc_exch_alloc() is called when retrying the sequence, the mempool_alloc() will fail to allocate the exchange because the mempool of the exchange manager has already been released. This patch is to cancel any pending retry work of the local port before we start to destroy the interface. Also, when resetting the local port, we should also stop the scheduled pending retries. Signed-off-by: Steve Ma Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_lport.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c index a6ab692f5f5..e6ea4f11953 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -619,6 +619,7 @@ int fc_fabric_logoff(struct fc_lport *lport) mutex_lock(&lport->lp_mutex); fc_lport_enter_logo(lport); mutex_unlock(&lport->lp_mutex); + cancel_delayed_work_sync(&lport->retry_work); return 0; } EXPORT_SYMBOL(fc_fabric_logoff); @@ -918,6 +919,7 @@ static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, */ int fc_lport_reset(struct fc_lport *lport) { + cancel_delayed_work_sync(&lport->retry_work); mutex_lock(&lport->lp_mutex); fc_lport_enter_reset(lport); mutex_unlock(&lport->lp_mutex); -- cgit v1.2.3-18-g5258 From 5101ff99f59aefb72e0c96e82aa32048ac9f8425 Mon Sep 17 00:00:00 2001 From: Robert Love Date: Fri, 27 Feb 2009 10:55:18 -0800 Subject: [SCSI] libfc: Don't violate transport template for rogue port creation Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_disc.c | 6 +++--- drivers/scsi/libfc/fc_lport.c | 4 ++-- drivers/scsi/libfc/fc_rport.c | 3 +++ 3 files changed, 8 insertions(+), 5 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c index dd1564c9e04..15e3f840c04 100644 --- a/drivers/scsi/libfc/fc_disc.c +++ b/drivers/scsi/libfc/fc_disc.c @@ -430,7 +430,7 @@ static int fc_disc_new_target(struct fc_disc *disc, dp.ids.port_name = ids->port_name; dp.ids.node_name = ids->node_name; dp.ids.roles = ids->roles; - rport = fc_rport_rogue_create(&dp); + rport = lport->tt.rport_create(&dp); } if (!rport) error = -ENOMEM; @@ -617,7 +617,7 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len) if ((dp.ids.port_id != fc_host_port_id(lport->host)) && (dp.ids.port_name != lport->wwpn)) { - rport = fc_rport_rogue_create(&dp); + rport = lport->tt.rport_create(&dp); if (rport) { rdata = rport->dd_data; rdata->ops = &fc_disc_rport_ops; @@ -769,7 +769,7 @@ static void fc_disc_single(struct fc_disc *disc, struct fc_disc_port *dp) if (rport) fc_disc_del_target(disc, rport); - new_rport = fc_rport_rogue_create(dp); + new_rport = lport->tt.rport_create(dp); if (new_rport) { rdata = new_rport->dd_data; rdata->ops = &fc_disc_rport_ops; diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c index e6ea4f11953..07335ae2947 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -232,7 +232,7 @@ static void fc_lport_ptp_setup(struct fc_lport *lport, lport->ptp_rp = NULL; } - lport->ptp_rp = fc_rport_rogue_create(&dp); + lport->ptp_rp = lport->tt.rport_create(&dp); lport->tt.rport_login(lport->ptp_rp); @@ -1282,7 +1282,7 @@ static void fc_lport_enter_dns(struct fc_lport *lport) fc_lport_state_enter(lport, LPORT_ST_DNS); - rport = fc_rport_rogue_create(&dp); + rport = lport->tt.rport_create(&dp); if (!rport) goto err; diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c index 600a8fffa94..81b3ca18878 100644 --- a/drivers/scsi/libfc/fc_rport.c +++ b/drivers/scsi/libfc/fc_rport.c @@ -1271,6 +1271,9 @@ static void fc_rport_flush_queue(void) int fc_rport_init(struct fc_lport *lport) { + if (!lport->tt.rport_create) + lport->tt.rport_create = fc_rport_rogue_create; + if (!lport->tt.rport_login) lport->tt.rport_login = fc_rport_login; -- cgit v1.2.3-18-g5258 From 23f11f9076fcd6ee20c56e413b11f1b5658e3f82 Mon Sep 17 00:00:00 2001 From: Robert Love Date: Fri, 27 Feb 2009 10:55:23 -0800 Subject: [SCSI] libfc: correct RPORT_TO_PRIV usage We only need to use this macro when assigning a value to rport->dd_data. All other accesses should just use dd_data. Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_disc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c index 15e3f840c04..9f4e408bc7f 100644 --- a/drivers/scsi/libfc/fc_disc.c +++ b/drivers/scsi/libfc/fc_disc.c @@ -246,7 +246,7 @@ static void fc_disc_recv_rscn_req(struct fc_seq *sp, struct fc_frame *fp, list_del(&dp->peers); rport = lport->tt.rport_lookup(lport, dp->ids.port_id); if (rport) { - rdata = RPORT_TO_PRIV(rport); + rdata = rport->dd_data; list_del(&rdata->peers); lport->tt.rport_logoff(rport); } @@ -453,7 +453,7 @@ static int fc_disc_new_target(struct fc_disc *disc, static void fc_disc_del_target(struct fc_disc *disc, struct fc_rport *rport) { struct fc_lport *lport = disc->lport; - struct fc_rport_libfc_priv *rdata = RPORT_TO_PRIV(rport); + struct fc_rport_libfc_priv *rdata = rport->dd_data; list_del(&rdata->peers); lport->tt.rport_logoff(rport); } -- cgit v1.2.3-18-g5258 From d3b33327cab0c8e9cae2c12d908ca79433c0d1ac Mon Sep 17 00:00:00 2001 From: Robert Love Date: Fri, 27 Feb 2009 10:55:29 -0800 Subject: [SCSI] libfc: rename rp to rdata in fc_disc_new_target() Just rename the variable as per our naming convention. Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_disc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c index 9f4e408bc7f..cfbce893941 100644 --- a/drivers/scsi/libfc/fc_disc.c +++ b/drivers/scsi/libfc/fc_disc.c @@ -396,7 +396,7 @@ static int fc_disc_new_target(struct fc_disc *disc, struct fc_rport_identifiers *ids) { struct fc_lport *lport = disc->lport; - struct fc_rport_libfc_priv *rp; + struct fc_rport_libfc_priv *rdata; int error = 0; if (rport && ids->port_name) { @@ -436,9 +436,9 @@ static int fc_disc_new_target(struct fc_disc *disc, error = -ENOMEM; } if (rport) { - rp = rport->dd_data; - rp->ops = &fc_disc_rport_ops; - rp->rp_state = RPORT_ST_INIT; + rdata = rport->dd_data; + rdata->ops = &fc_disc_rport_ops; + rdata->rp_state = RPORT_ST_INIT; lport->tt.rport_login(rport); } } -- cgit v1.2.3-18-g5258 From efaf5c085dd2d31757b0ff7886970dfddd8d1808 Mon Sep 17 00:00:00 2001 From: Robert Love Date: Fri, 27 Feb 2009 10:55:34 -0800 Subject: [SCSI] libfc: check for err when recv and state is incorrect If we've just created an interface and the an rport is logging in we may have a request on the wire (say PRLI). If we destroy the interface, we'll go through each rport on the disc->rports list and set each rport's state to NONE. Then the lport will reset the EM. The EM reset will send a CLOSED event to the prli_resp() handler which will notice that the state != PRLI. In this case it frees the frame pointer, decrements the refcount and unlocks the rport. The problem is that there isn't a frame in this case. It's just a pointer with an embedded error code. The free causes an Oops. This patch moves the error checking to be before the state checking. Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_lport.c | 50 +++++++++++++++++++++---------------------- drivers/scsi/libfc/fc_rport.c | 30 +++++++++++++------------- 2 files changed, 40 insertions(+), 40 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c index 07335ae2947..c00de2244c7 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -1031,17 +1031,17 @@ static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp, FC_DEBUG_LPORT("Received a RFT_ID response\n"); + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + if (lport->state != LPORT_ST_RFT_ID) { FC_DBG("Received a RFT_ID response, but in state %s\n", fc_lport_state(lport)); goto out; } - if (IS_ERR(fp)) { - fc_lport_error(lport, fp); - goto err; - } - fh = fc_frame_header_get(fp); ct = fc_frame_payload_get(fp, sizeof(*ct)); @@ -1083,17 +1083,17 @@ static void fc_lport_rpn_id_resp(struct fc_seq *sp, struct fc_frame *fp, FC_DEBUG_LPORT("Received a RPN_ID response\n"); + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + if (lport->state != LPORT_ST_RPN_ID) { FC_DBG("Received a RPN_ID response, but in state %s\n", fc_lport_state(lport)); goto out; } - if (IS_ERR(fp)) { - fc_lport_error(lport, fp); - goto err; - } - fh = fc_frame_header_get(fp); ct = fc_frame_payload_get(fp, sizeof(*ct)); if (fh && ct && fh->fh_type == FC_TYPE_CT && @@ -1133,17 +1133,17 @@ static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, FC_DEBUG_LPORT("Received a SCR response\n"); + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + if (lport->state != LPORT_ST_SCR) { FC_DBG("Received a SCR response, but in state %s\n", fc_lport_state(lport)); goto out; } - if (IS_ERR(fp)) { - fc_lport_error(lport, fp); - goto err; - } - op = fc_frame_payload_op(fp); if (op == ELS_LS_ACC) fc_lport_enter_ready(lport); @@ -1359,17 +1359,17 @@ static void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, FC_DEBUG_LPORT("Received a LOGO response\n"); + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + if (lport->state != LPORT_ST_LOGO) { FC_DBG("Received a LOGO response, but in state %s\n", fc_lport_state(lport)); goto out; } - if (IS_ERR(fp)) { - fc_lport_error(lport, fp); - goto err; - } - op = fc_frame_payload_op(fp); if (op == ELS_LS_ACC) fc_lport_enter_reset(lport); @@ -1443,17 +1443,17 @@ static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, FC_DEBUG_LPORT("Received a FLOGI response\n"); + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + if (lport->state != LPORT_ST_FLOGI) { FC_DBG("Received a FLOGI response, but in state %s\n", fc_lport_state(lport)); goto out; } - if (IS_ERR(fp)) { - fc_lport_error(lport, fp); - goto err; - } - fh = fc_frame_header_get(fp); did = ntoh24(fh->fh_d_id); if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c index 81b3ca18878..4f23a9bb15a 100644 --- a/drivers/scsi/libfc/fc_rport.c +++ b/drivers/scsi/libfc/fc_rport.c @@ -505,17 +505,17 @@ static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, FC_DEBUG_RPORT("Received a PLOGI response from port (%6x)\n", rport->port_id); + if (IS_ERR(fp)) { + fc_rport_error_retry(rport, fp); + goto err; + } + if (rdata->rp_state != RPORT_ST_PLOGI) { FC_DBG("Received a PLOGI response, but in state %s\n", fc_rport_state(rport)); goto out; } - if (IS_ERR(fp)) { - fc_rport_error_retry(rport, fp); - goto err; - } - op = fc_frame_payload_op(fp); if (op == ELS_LS_ACC && (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { @@ -614,17 +614,17 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, FC_DEBUG_RPORT("Received a PRLI response from port (%6x)\n", rport->port_id); + if (IS_ERR(fp)) { + fc_rport_error_retry(rport, fp); + goto err; + } + if (rdata->rp_state != RPORT_ST_PRLI) { FC_DBG("Received a PRLI response, but in state %s\n", fc_rport_state(rport)); goto out; } - if (IS_ERR(fp)) { - fc_rport_error_retry(rport, fp); - goto err; - } - op = fc_frame_payload_op(fp); if (op == ELS_LS_ACC) { pp = fc_frame_payload_get(fp, sizeof(*pp)); @@ -764,17 +764,17 @@ static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, FC_DEBUG_RPORT("Received a RTV response from port (%6x)\n", rport->port_id); + if (IS_ERR(fp)) { + fc_rport_error(rport, fp); + goto err; + } + if (rdata->rp_state != RPORT_ST_RTV) { FC_DBG("Received a RTV response, but in state %s\n", fc_rport_state(rport)); goto out; } - if (IS_ERR(fp)) { - fc_rport_error(rport, fp); - goto err; - } - op = fc_frame_payload_op(fp); if (op == ELS_LS_ACC) { struct fc_els_rtv_acc *rtv; -- cgit v1.2.3-18-g5258 From 34f42a070fc98f5dc07e9fa2338b7b8d1dc347eb Mon Sep 17 00:00:00 2001 From: Robert Love Date: Fri, 27 Feb 2009 10:55:45 -0800 Subject: [SCSI] libfc, fcoe: Fix kerneldoc comments 1) Added '()' for function names in kerneldoc comments 2) Changed comment bookends from '**/' to '*/'. The comment on the the mailing list was that '**/' "is consistently unconventional. Not wrong, just odd." The Documentation/kernel-doc-nano-HOWTO.txt states that kerneldoc comment blocks should end with '**/' but most (if not all) instance I found under drivers/scsi/ were only using the '*/' so I converted to that style. 3) Removed incorrect linebreaks in kerneldoc comments where found 4) Removed a few unnecessary blank comment lines in kerneldoc comment blocks Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/fcoe/fc_transport_fcoe.c | 77 ++++++++-------- drivers/scsi/fcoe/fcoe_sw.c | 42 ++++----- drivers/scsi/fcoe/libfcoe.c | 162 +++++++++++++++++----------------- drivers/scsi/libfc/fc_disc.c | 45 +++++----- drivers/scsi/libfc/fc_fcp.c | 46 +++++----- drivers/scsi/libfc/fc_lport.c | 77 ++++++++-------- drivers/scsi/libfc/fc_rport.c | 46 +++++----- 7 files changed, 245 insertions(+), 250 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/fcoe/fc_transport_fcoe.c b/drivers/scsi/fcoe/fc_transport_fcoe.c index bf7fe6fc082..0eea4c434c3 100644 --- a/drivers/scsi/fcoe/fc_transport_fcoe.c +++ b/drivers/scsi/fcoe/fc_transport_fcoe.c @@ -33,19 +33,19 @@ static LIST_HEAD(fcoe_transports); static DEFINE_MUTEX(fcoe_transports_lock); /** - * fcoe_transport_default - returns ptr to the default transport fcoe_sw - **/ + * fcoe_transport_default() - Returns ptr to the default transport fcoe_sw + */ struct fcoe_transport *fcoe_transport_default(void) { return &fcoe_sw_transport; } /** - * fcoe_transport_to_pcidev - get the pci dev from a netdev + * fcoe_transport_to_pcidev() - get the pci dev from a netdev * @netdev: the netdev that pci dev will be retrived from * * Returns: NULL or the corrsponding pci_dev - **/ + */ struct pci_dev *fcoe_transport_pcidev(const struct net_device *netdev) { if (!netdev->dev.parent) @@ -54,16 +54,14 @@ struct pci_dev *fcoe_transport_pcidev(const struct net_device *netdev) } /** - * fcoe_transport_device_lookup - find out netdev is managed by the - * transport - * assign a transport to a device + * fcoe_transport_device_lookup() - Lookup a transport * @netdev: the netdev the transport to be attached to * * This will look for existing offload driver, if not found, it falls back to * the default sw hba (fcoe_sw) as its fcoe transport. * * Returns: 0 for success - **/ + */ static struct fcoe_transport_internal *fcoe_transport_device_lookup( struct fcoe_transport *t, struct net_device *netdev) { @@ -81,14 +79,14 @@ static struct fcoe_transport_internal *fcoe_transport_device_lookup( return NULL; } /** - * fcoe_transport_device_add - assign a transport to a device + * fcoe_transport_device_add() - Assign a transport to a device * @netdev: the netdev the transport to be attached to * * This will look for existing offload driver, if not found, it falls back to * the default sw hba (fcoe_sw) as its fcoe transport. * * Returns: 0 for success - **/ + */ static int fcoe_transport_device_add(struct fcoe_transport *t, struct net_device *netdev) { @@ -123,14 +121,14 @@ static int fcoe_transport_device_add(struct fcoe_transport *t, } /** - * fcoe_transport_device_remove - remove a device from its transport + * fcoe_transport_device_remove() - Remove a device from its transport * @netdev: the netdev the transport to be attached to * - * this removes the device from the transport so the given transport will + * This removes the device from the transport so the given transport will * not manage this device any more * * Returns: 0 for success - **/ + */ static int fcoe_transport_device_remove(struct fcoe_transport *t, struct net_device *netdev) { @@ -155,13 +153,13 @@ static int fcoe_transport_device_remove(struct fcoe_transport *t, } /** - * fcoe_transport_device_remove_all - remove all from transport devlist + * fcoe_transport_device_remove_all() - Remove all from transport devlist * - * this removes the device from the transport so the given transport will + * This removes the device from the transport so the given transport will * not manage this device any more * * Returns: 0 for success - **/ + */ static void fcoe_transport_device_remove_all(struct fcoe_transport *t) { struct fcoe_transport_internal *ti, *tmp; @@ -175,16 +173,16 @@ static void fcoe_transport_device_remove_all(struct fcoe_transport *t) } /** - * fcoe_transport_match - use the bus device match function to match the hw - * @t: the fcoe transport - * @netdev: + * fcoe_transport_match() - Use the bus device match function to match the hw + * @t: The fcoe transport to check + * @netdev: The netdev to match against * - * This function is used to check if the givne transport wants to manage the + * This function is used to check if the given transport wants to manage the * input netdev. if the transports implements the match function, it will be * called, o.w. we just compare the pci vendor and device id. * * Returns: true for match up - **/ + */ static bool fcoe_transport_match(struct fcoe_transport *t, struct net_device *netdev) { @@ -210,15 +208,15 @@ static bool fcoe_transport_match(struct fcoe_transport *t, } /** - * fcoe_transport_lookup - check if the transport is already registered + * fcoe_transport_lookup() - Check if the transport is already registered * @t: the transport to be looked up * * This compares the parent device (pci) vendor and device id * * Returns: NULL if not found * - * TODO - return default sw transport if no other transport is found - **/ + * TODO: return default sw transport if no other transport is found + */ static struct fcoe_transport *fcoe_transport_lookup( struct net_device *netdev) { @@ -239,11 +237,11 @@ static struct fcoe_transport *fcoe_transport_lookup( } /** - * fcoe_transport_register - adds a fcoe transport to the fcoe transports list + * fcoe_transport_register() - Adds a fcoe transport to the fcoe transports list * @t: ptr to the fcoe transport to be added * * Returns: 0 for success - **/ + */ int fcoe_transport_register(struct fcoe_transport *t) { struct fcoe_transport *tt; @@ -269,11 +267,11 @@ int fcoe_transport_register(struct fcoe_transport *t) EXPORT_SYMBOL_GPL(fcoe_transport_register); /** - * fcoe_transport_unregister - remove the tranport fro the fcoe transports list + * fcoe_transport_unregister() - Remove the tranport fro the fcoe transports list * @t: ptr to the fcoe transport to be removed * * Returns: 0 for success - **/ + */ int fcoe_transport_unregister(struct fcoe_transport *t) { struct fcoe_transport *tt, *tmp; @@ -294,8 +292,8 @@ int fcoe_transport_unregister(struct fcoe_transport *t) } EXPORT_SYMBOL_GPL(fcoe_transport_unregister); -/* - * fcoe_load_transport_driver - load an offload driver by alias name +/** + * fcoe_load_transport_driver() - Load an offload driver by alias name * @netdev: the target net device * * Requests for an offload driver module as the fcoe transport, if fails, it @@ -307,7 +305,7 @@ EXPORT_SYMBOL_GPL(fcoe_transport_unregister); * 3. pure hw fcoe hba may not have netdev * * Returns: 0 for success - **/ + */ int fcoe_load_transport_driver(struct net_device *netdev) { struct pci_dev *pci; @@ -335,14 +333,14 @@ int fcoe_load_transport_driver(struct net_device *netdev) EXPORT_SYMBOL_GPL(fcoe_load_transport_driver); /** - * fcoe_transport_attach - load transport to fcoe + * fcoe_transport_attach() - Load transport to fcoe * @netdev: the netdev the transport to be attached to * * This will look for existing offload driver, if not found, it falls back to * the default sw hba (fcoe_sw) as its fcoe transport. * * Returns: 0 for success - **/ + */ int fcoe_transport_attach(struct net_device *netdev) { struct fcoe_transport *t; @@ -373,11 +371,11 @@ int fcoe_transport_attach(struct net_device *netdev) EXPORT_SYMBOL_GPL(fcoe_transport_attach); /** - * fcoe_transport_release - unload transport from fcoe + * fcoe_transport_release() - Unload transport from fcoe * @netdev: the net device on which fcoe is to be released * * Returns: 0 for success - **/ + */ int fcoe_transport_release(struct net_device *netdev) { struct fcoe_transport *t; @@ -410,12 +408,12 @@ int fcoe_transport_release(struct net_device *netdev) EXPORT_SYMBOL_GPL(fcoe_transport_release); /** - * fcoe_transport_init - initializes fcoe transport layer + * fcoe_transport_init() - Initializes fcoe transport layer * * This prepares for the fcoe transport layer * * Returns: none - **/ + */ int __init fcoe_transport_init(void) { INIT_LIST_HEAD(&fcoe_transports); @@ -424,12 +422,13 @@ int __init fcoe_transport_init(void) } /** - * fcoe_transport_exit - cleans up the fcoe transport layer + * fcoe_transport_exit() - Cleans up the fcoe transport layer + * * This cleans up the fcoe transport layer. removing any transport on the list, * note that the transport destroy func is not called here. * * Returns: none - **/ + */ int __exit fcoe_transport_exit(void) { struct fcoe_transport *t, *tmp; diff --git a/drivers/scsi/fcoe/fcoe_sw.c b/drivers/scsi/fcoe/fcoe_sw.c index cf83675a0fb..007d1fbae80 100644 --- a/drivers/scsi/fcoe/fcoe_sw.c +++ b/drivers/scsi/fcoe/fcoe_sw.c @@ -104,13 +104,12 @@ static struct scsi_host_template fcoe_sw_shost_template = { .max_sectors = 0xffff, }; -/* - * fcoe_sw_lport_config - sets up the fc_lport +/** + * fcoe_sw_lport_config() - sets up the fc_lport * @lp: ptr to the fc_lport * @shost: ptr to the parent scsi host * * Returns: 0 for success - * */ static int fcoe_sw_lport_config(struct fc_lport *lp) { @@ -137,16 +136,14 @@ static int fcoe_sw_lport_config(struct fc_lport *lp) return 0; } -/* - * fcoe_sw_netdev_config - sets up fcoe_softc for lport and network - * related properties +/** + * fcoe_sw_netdev_config() - Set up netdev for SW FCoE * @lp : ptr to the fc_lport * @netdev : ptr to the associated netdevice struct * * Must be called after fcoe_sw_lport_config() as it will use lport mutex * * Returns : 0 for success - * */ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev) { @@ -224,16 +221,15 @@ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev) return 0; } -/* - * fcoe_sw_shost_config - sets up fc_lport->host +/** + * fcoe_sw_shost_config() - Sets up fc_lport->host * @lp : ptr to the fc_lport * @shost : ptr to the associated scsi host * @dev : device associated to scsi host * - * Must be called after fcoe_sw_lport_config) and fcoe_sw_netdev_config() + * Must be called after fcoe_sw_lport_config() and fcoe_sw_netdev_config() * * Returns : 0 for success - * */ static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost, struct device *dev) @@ -261,8 +257,8 @@ static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost, return 0; } -/* - * fcoe_sw_em_config - allocates em for this lport +/** + * fcoe_sw_em_config() - allocates em for this lport * @lp: the port that em is to allocated for * * Returns : 0 on success @@ -279,8 +275,8 @@ static inline int fcoe_sw_em_config(struct fc_lport *lp) return 0; } -/* - * fcoe_sw_destroy - FCoE software HBA tear-down function +/** + * fcoe_sw_destroy() - FCoE software HBA tear-down function * @netdev: ptr to the associated net_device * * Returns: 0 if link is OK for use by FCoE. @@ -353,8 +349,8 @@ static struct libfc_function_template fcoe_sw_libfc_fcn_templ = { .frame_send = fcoe_xmit, }; -/* - * fcoe_sw_create - this function creates the fcoe interface +/** + * fcoe_sw_create() - this function creates the fcoe interface * @netdev: pointer the associated netdevice * * Creates fc_lport struct and scsi_host for lport, configures lport @@ -440,8 +436,8 @@ out_host_put: return rc; } -/* - * fcoe_sw_match - the fcoe sw transport match function +/** + * fcoe_sw_match() - The FCoE SW transport match function * * Returns : false always */ @@ -461,8 +457,8 @@ struct fcoe_transport fcoe_sw_transport = { .device = 0xffff, }; -/* - * fcoe_sw_init - registers fcoe_sw_transport +/** + * fcoe_sw_init() - Registers fcoe_sw_transport * * Returns : 0 on success */ @@ -480,8 +476,8 @@ int __init fcoe_sw_init(void) return 0; } -/* - * fcoe_sw_exit - unregisters fcoe_sw_transport +/** + * fcoe_sw_exit() - Unregisters fcoe_sw_transport * * Returns : 0 on success */ diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c index 296071043f5..5e68652985b 100644 --- a/drivers/scsi/fcoe/libfcoe.c +++ b/drivers/scsi/fcoe/libfcoe.c @@ -91,13 +91,13 @@ static struct notifier_block fcoe_cpu_notifier = { }; /** - * fcoe_create_percpu_data - creates the associated cpu data + * fcoe_create_percpu_data() - creates the associated cpu data * @cpu: index for the cpu where fcoe cpu data will be created * * create percpu stats block, from cpu add notifier * * Returns: none - **/ + */ static void fcoe_create_percpu_data(int cpu) { struct fc_lport *lp; @@ -115,13 +115,13 @@ static void fcoe_create_percpu_data(int cpu) } /** - * fcoe_destroy_percpu_data - destroys the associated cpu data + * fcoe_destroy_percpu_data() - destroys the associated cpu data * @cpu: index for the cpu where fcoe cpu data will destroyed * * destroy percpu stats block called by cpu add/remove notifier * * Retuns: none - **/ + */ static void fcoe_destroy_percpu_data(int cpu) { struct fc_lport *lp; @@ -137,7 +137,7 @@ static void fcoe_destroy_percpu_data(int cpu) } /** - * fcoe_cpu_callback - fcoe cpu hotplug event callback + * fcoe_cpu_callback() - fcoe cpu hotplug event callback * @nfb: callback data block * @action: event triggering the callback * @hcpu: index for the cpu of this event @@ -145,7 +145,7 @@ static void fcoe_destroy_percpu_data(int cpu) * this creates or destroys per cpu data for fcoe * * Returns NOTIFY_OK always. - **/ + */ static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) { @@ -166,7 +166,7 @@ static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action, #endif /* CONFIG_HOTPLUG_CPU */ /** - * fcoe_rcv - this is the fcoe receive function called by NET_RX_SOFTIRQ + * fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ * @skb: the receive skb * @dev: associated net device * @ptype: context @@ -175,7 +175,7 @@ static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action, * this function will receive the packet and build fc frame and pass it up * * Returns: 0 for success - **/ + */ int fcoe_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *olddev) { @@ -265,11 +265,11 @@ err2: EXPORT_SYMBOL_GPL(fcoe_rcv); /** - * fcoe_start_io - pass to netdev to start xmit for fcoe + * fcoe_start_io() - pass to netdev to start xmit for fcoe * @skb: the skb to be xmitted * * Returns: 0 for success - **/ + */ static inline int fcoe_start_io(struct sk_buff *skb) { int rc; @@ -283,12 +283,12 @@ static inline int fcoe_start_io(struct sk_buff *skb) } /** - * fcoe_get_paged_crc_eof - in case we need alloc a page for crc_eof + * fcoe_get_paged_crc_eof() - in case we need alloc a page for crc_eof * @skb: the skb to be xmitted * @tlen: total len * * Returns: 0 for success - **/ + */ static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) { struct fcoe_percpu_s *fps; @@ -326,13 +326,12 @@ static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) } /** - * fcoe_fc_crc - calculates FC CRC in this fcoe skb + * fcoe_fc_crc() - calculates FC CRC in this fcoe skb * @fp: the fc_frame containg data to be checksummed * * This uses crc32() to calculate the crc for fc frame * Return : 32 bit crc - * - **/ + */ u32 fcoe_fc_crc(struct fc_frame *fp) { struct sk_buff *skb = fp_skb(fp); @@ -363,13 +362,12 @@ u32 fcoe_fc_crc(struct fc_frame *fp) EXPORT_SYMBOL_GPL(fcoe_fc_crc); /** - * fcoe_xmit - FCoE frame transmit function + * fcoe_xmit() - FCoE frame transmit function * @lp: the associated local port * @fp: the fc_frame to be transmitted * * Return : 0 for success - * - **/ + */ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) { int wlen, rc = 0; @@ -511,12 +509,11 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) } EXPORT_SYMBOL_GPL(fcoe_xmit); -/* - * fcoe_percpu_receive_thread - recv thread per cpu +/** + * fcoe_percpu_receive_thread() - recv thread per cpu * @arg: ptr to the fcoe per cpu struct * * Return: 0 for success - * */ int fcoe_percpu_receive_thread(void *arg) { @@ -658,7 +655,7 @@ int fcoe_percpu_receive_thread(void *arg) } /** - * fcoe_recv_flogi - flogi receive function + * fcoe_recv_flogi() - flogi receive function * @fc: associated fcoe_softc * @fp: the recieved frame * @sa: the source address of this flogi @@ -667,7 +664,7 @@ int fcoe_percpu_receive_thread(void *arg) * mac address for the initiator, eitehr OUI based or GW based. * * Returns: none - **/ + */ static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa) { struct fc_frame_header *fh; @@ -715,7 +712,7 @@ static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa) } /** - * fcoe_watchdog - fcoe timer callback + * fcoe_watchdog() - fcoe timer callback * @vp: * * This checks the pending queue length for fcoe and set lport qfull @@ -723,7 +720,7 @@ static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa) * fcoe_hostlist. * * Returns: 0 for success - **/ + */ void fcoe_watchdog(ulong vp) { struct fc_lport *lp; @@ -750,7 +747,7 @@ void fcoe_watchdog(ulong vp) /** - * fcoe_check_wait_queue - put the skb into fcoe pending xmit queue + * fcoe_check_wait_queue() - put the skb into fcoe pending xmit queue * @lp: the fc_port for this skb * @skb: the associated skb to be xmitted * @@ -764,7 +761,7 @@ void fcoe_watchdog(ulong vp) * by the next skb transmit. * * Returns: 0 for success - **/ + */ static int fcoe_check_wait_queue(struct fc_lport *lp) { int rc; @@ -797,12 +794,12 @@ static int fcoe_check_wait_queue(struct fc_lport *lp) } /** - * fcoe_insert_wait_queue_head - puts skb to fcoe pending queue head + * fcoe_insert_wait_queue_head() - puts skb to fcoe pending queue head * @lp: the fc_port for this skb * @skb: the associated skb to be xmitted * * Returns: none - **/ + */ static void fcoe_insert_wait_queue_head(struct fc_lport *lp, struct sk_buff *skb) { @@ -815,12 +812,12 @@ static void fcoe_insert_wait_queue_head(struct fc_lport *lp, } /** - * fcoe_insert_wait_queue - put the skb into fcoe pending queue tail + * fcoe_insert_wait_queue() - put the skb into fcoe pending queue tail * @lp: the fc_port for this skb * @skb: the associated skb to be xmitted * * Returns: none - **/ + */ static void fcoe_insert_wait_queue(struct fc_lport *lp, struct sk_buff *skb) { @@ -833,10 +830,9 @@ static void fcoe_insert_wait_queue(struct fc_lport *lp, } /** - * fcoe_dev_setup - setup link change notification interface - * - **/ -static void fcoe_dev_setup(void) + * fcoe_dev_setup() - setup link change notification interface + */ +static void fcoe_dev_setup() { /* * here setup a interface specific wd time to @@ -846,15 +842,15 @@ static void fcoe_dev_setup(void) } /** - * fcoe_dev_setup - cleanup link change notification interface - **/ + * fcoe_dev_setup() - cleanup link change notification interface + */ static void fcoe_dev_cleanup(void) { unregister_netdevice_notifier(&fcoe_notifier); } /** - * fcoe_device_notification - netdev event notification callback + * fcoe_device_notification() - netdev event notification callback * @notifier: context of the notification * @event: type of event * @ptr: fixed array for output parsed ifname @@ -862,7 +858,7 @@ static void fcoe_dev_cleanup(void) * This function is called by the ethernet driver in case of link change event * * Returns: 0 for success - **/ + */ static int fcoe_device_notification(struct notifier_block *notifier, ulong event, void *ptr) { @@ -926,12 +922,12 @@ out: } /** - * fcoe_if_to_netdev - parse a name buffer to get netdev + * fcoe_if_to_netdev() - parse a name buffer to get netdev * @ifname: fixed array for output parsed ifname * @buffer: incoming buffer to be copied * * Returns: NULL or ptr to netdeive - **/ + */ static struct net_device *fcoe_if_to_netdev(const char *buffer) { char *cp; @@ -948,11 +944,11 @@ static struct net_device *fcoe_if_to_netdev(const char *buffer) } /** - * fcoe_netdev_to_module_owner - finds out the nic drive moddule of the netdev + * fcoe_netdev_to_module_owner() - finds out the nic drive moddule of the netdev * @netdev: the target netdev * * Returns: ptr to the struct module, NULL for failure - **/ + */ static struct module *fcoe_netdev_to_module_owner( const struct net_device *netdev) { @@ -972,12 +968,14 @@ static struct module *fcoe_netdev_to_module_owner( } /** - * fcoe_ethdrv_get - holds the nic driver module by try_module_get() for - * the corresponding netdev. + * fcoe_ethdrv_get() - Hold the Ethernet driver * @netdev: the target netdev * + * Holds the Ethernet driver module by try_module_get() for + * the corresponding netdev. + * * Returns: 0 for succsss - **/ + */ static int fcoe_ethdrv_get(const struct net_device *netdev) { struct module *owner; @@ -992,12 +990,14 @@ static int fcoe_ethdrv_get(const struct net_device *netdev) } /** - * fcoe_ethdrv_get - releases the nic driver module by module_put for - * the corresponding netdev. + * fcoe_ethdrv_put() - Release the Ethernet driver * @netdev: the target netdev * + * Releases the Ethernet driver module by module_put for + * the corresponding netdev. + * * Returns: 0 for succsss - **/ + */ static int fcoe_ethdrv_put(const struct net_device *netdev) { struct module *owner; @@ -1013,12 +1013,12 @@ static int fcoe_ethdrv_put(const struct net_device *netdev) } /** - * fcoe_destroy- handles the destroy from sysfs + * fcoe_destroy() - handles the d