From: Hannes Reinecke <hare@suse.de>
To: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: James Bottomley <james.bottomley@hansenpartnership.com>,
Christoph Hellwig <hch@lst.de>,
Johannes Thumshirn <jth@kernel.org>,
linux-scsi@vger.kernel.org, Mike Snitzer <snitzer@redhat.com>,
Martin Wilck <martin.wilck@suse.com>,
Hannes Reinecke <hare@suse.de>, Hannes Reinecke <hare@suse.com>
Subject: [PATCH 17/30] libfc: sanitize E_D_TOV and R_A_TOV setting
Date: Fri, 26 Aug 2016 14:01:40 +0200 [thread overview]
Message-ID: <1472212913-39810-18-git-send-email-hare@suse.de> (raw)
In-Reply-To: <1472212913-39810-1-git-send-email-hare@suse.de>
When setting the FCP timeout we need to ensure a lower boundary
for E_D_TOV and R_A_TOV, otherwise we'd be getting spurious I/O
issues due to the fcp timer firing too early.
Signed-off-by: Hannes Reinecke <hare@suse.com>
---
drivers/scsi/libfc/fc_fcp.c | 9 +++++----
drivers/scsi/libfc/fc_lport.c | 8 +++++---
drivers/scsi/libfc/fc_rport.c | 6 ++++--
3 files changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index abddfe2..1cb2c59 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -1139,8 +1139,11 @@ static int fc_fcp_pkt_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp)
static inline unsigned int get_fsp_rec_tov(struct fc_fcp_pkt *fsp)
{
struct fc_rport_libfc_priv *rpriv = fsp->rport->dd_data;
+ unsigned int e_d_tov = FC_DEF_E_D_TOV;
- return msecs_to_jiffies(rpriv->e_d_tov) + HZ;
+ if (rpriv && rpriv->e_d_tov > e_d_tov)
+ e_d_tov = rpriv->e_d_tov;
+ return msecs_to_jiffies(e_d_tov) + HZ;
}
/**
@@ -1696,7 +1699,6 @@ static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum fc_rctl r_ctl, u32 offset)
struct fc_seq *seq;
struct fcp_srr *srr;
struct fc_frame *fp;
- unsigned int rec_tov;
rport = fsp->rport;
rpriv = rport->dd_data;
@@ -1720,10 +1722,9 @@ static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum fc_rctl r_ctl, u32 offset)
rpriv->local_port->port_id, FC_TYPE_FCP,
FC_FCTL_REQ, 0);
- rec_tov = get_fsp_rec_tov(fsp);
seq = lport->tt.exch_seq_send(lport, fp, fc_fcp_srr_resp,
fc_fcp_pkt_destroy,
- fsp, jiffies_to_msecs(rec_tov));
+ fsp, get_fsp_rec_tov(fsp));
if (!seq)
goto retry;
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 04ce7cf..ccf773a 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -1772,7 +1772,7 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
if ((csp_flags & FC_SP_FT_FPORT) == 0) {
if (e_d_tov > lport->e_d_tov)
lport->e_d_tov = e_d_tov;
- lport->r_a_tov = 2 * e_d_tov;
+ lport->r_a_tov = 2 * lport->e_d_tov;
fc_lport_set_port_id(lport, did, fp);
printk(KERN_INFO "host%d: libfc: "
"Port (%6.6x) entered "
@@ -1784,8 +1784,10 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
get_unaligned_be64(
&flp->fl_wwnn));
} else {
- lport->e_d_tov = e_d_tov;
- lport->r_a_tov = r_a_tov;
+ if (e_d_tov > lport->e_d_tov)
+ lport->e_d_tov = e_d_tov;
+ if (r_a_tov > lport->r_a_tov)
+ lport->r_a_tov = r_a_tov;
fc_host_fabric_name(lport->host) =
get_unaligned_be64(&flp->fl_wwnn);
fc_lport_set_port_id(lport, did, fp);
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 68d4c92..5a9c871 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1328,13 +1328,15 @@ static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp,
tov = ntohl(rtv->rtv_r_a_tov);
if (tov == 0)
tov = 1;
- rdata->r_a_tov = tov;
+ if (tov > rdata->r_a_tov)
+ rdata->r_a_tov = tov;
tov = ntohl(rtv->rtv_e_d_tov);
if (toq & FC_ELS_RTV_EDRES)
tov /= 1000000;
if (tov == 0)
tov = 1;
- rdata->e_d_tov = tov;
+ if (tov > rdata->e_d_tov)
+ rdata->e_d_tov = tov;
}
}
--
1.8.5.6
next prev parent reply other threads:[~2016-08-26 12:02 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-26 12:01 [PATCH 00/30] FCoE VN2VN fixes Hannes Reinecke
2016-08-26 12:01 ` [PATCH 01/30] libfc: Revisit kref handling Hannes Reinecke
2016-08-26 13:37 ` Johannes Thumshirn
2016-08-26 12:01 ` [PATCH 02/30] libfc: additional debugging messages Hannes Reinecke
2016-08-26 12:01 ` [PATCH 03/30] libfc: spurious I/O error under high load Hannes Reinecke
2016-08-26 12:01 ` [PATCH 04/30] libfc: Do not login if the port is already started Hannes Reinecke
2016-08-26 12:01 ` [PATCH 05/30] libfc: use configured lport R_A_TOV when sending Hannes Reinecke
2016-08-26 12:01 ` [PATCH 06/30] libfc: use configured e_d_tov for remote port state Hannes Reinecke
2016-08-26 12:01 ` [PATCH 07/30] libfc: do not overwrite DID_TIME_OUT status Hannes Reinecke
2016-08-26 12:01 ` [PATCH 08/30] libfc: use error code for fc_rport_error() Hannes Reinecke
2016-08-26 12:01 ` [PATCH 09/30] libfc: Send LS_RJT responses on frame allocation Hannes Reinecke
2016-08-26 12:01 ` [PATCH 10/30] libfc: don't advance state machine for incoming FLOGI Hannes Reinecke
2016-08-26 12:01 ` [PATCH 11/30] libfc: Fixup disc_mutex handling Hannes Reinecke
2016-08-26 12:01 ` [PATCH 12/30] libfc: Do not drop down to FLOGI for fc_rport_login() Hannes Reinecke
2016-08-26 12:01 ` [PATCH 13/30] libfc: Implement RTV responder Hannes Reinecke
2016-08-26 12:01 ` [PATCH 14/30] libfc: Rework PRLI handling Hannes Reinecke
2016-08-26 12:01 ` [PATCH 15/30] libfc: Return LS_RJT_BUSY for PRLI in status PLOGI Hannes Reinecke
2016-08-26 12:01 ` [PATCH 16/30] libfc: Clarify ramp-down messages Hannes Reinecke
2016-08-26 12:01 ` Hannes Reinecke [this message]
2016-08-26 12:01 ` [PATCH 18/30] libfc: safeguard against invalid exchange index Hannes Reinecke
2016-08-26 12:01 ` [PATCH 19/30] libfc: quarantine timed out xids Hannes Reinecke
2016-08-26 12:01 ` [PATCH 20/30] libfc: don't fail sequence abort for completed Hannes Reinecke
2016-08-26 12:01 ` [PATCH 21/30] libfc: Do not drop out-of-order frames Hannes Reinecke
2016-08-26 12:01 ` [PATCH 22/30] libfc: reset timeout on queue full Hannes Reinecke
2016-08-26 12:01 ` [PATCH 23/30] libfc: wait for E_D_TOV when out-of-order sequence is received Hannes Reinecke
2016-08-26 12:01 ` [PATCH 24/30] fcoe: Use kfree_skb() instead of kfree() Hannes Reinecke
2016-08-26 12:01 ` [PATCH 25/30] fcoe: set default TC priority Hannes Reinecke
2016-08-26 12:01 ` [PATCH 26/30] fcoe: inhibit writing invalid values into the 'enabled' Hannes Reinecke
2016-08-26 12:01 ` [PATCH 27/30] fcoe: correct sending FIP VLAN packets on VLAN 0 Hannes Reinecke
2016-08-26 12:01 ` [PATCH 28/30] fcoe: FIP debugging Hannes Reinecke
2016-08-26 12:01 ` [PATCH 29/30] fcoe: filter out frames from invalid vlans Hannes Reinecke
2016-08-26 12:01 ` [PATCH 30/30] fcoe: make R_A_TOV and E_D_TOV configurable Hannes Reinecke
2016-08-26 13:48 ` [PATCH 00/30] FCoE VN2VN fixes Johannes Thumshirn
2016-08-31 2:46 ` Martin K. Petersen
2016-08-31 7:25 ` Johannes Thumshirn
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