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Date: Fri, 8 Jan 2021 18:31:52 +0200
From: Vladimir Oltean <olteanv@...il.com>
To: "David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Cong Wang <xiyou.wangcong@...il.com>,
Stephen Hemminger <stephen@...workplumber.org>,
Eric Dumazet <edumazet@...gle.com>,
George McCollister <george.mccollister@...il.com>,
Oleksij Rempel <o.rempel@...gutronix.de>,
Jay Vosburgh <j.vosburgh@...il.com>,
Veaceslav Falico <vfalico@...il.com>,
Andy Gospodarek <andy@...yhouse.net>,
Arnd Bergmann <arnd@...db.de>, Taehee Yoo <ap420073@...il.com>,
Jiri Pirko <jiri@...nulli.us>, Florian Westphal <fw@...len.de>,
Nikolay Aleksandrov <nikolay@...dia.com>,
Pravin B Shelar <pshelar@....org>,
Sridhar Samudrala <sridhar.samudrala@...el.com>,
Saeed Mahameed <saeedm@...dia.com>
Subject: [PATCH v5 net-next 09/16] scsi: fcoe: propagate errors from dev_get_stats
From: Vladimir Oltean <vladimir.oltean@....com>
The FCoE callback for the Link Error Status Block retrieves the FCS
error count using dev_get_stats. This function can now return errors.
Propagate these all the way to the sysfs device attributes.
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
Changes in v5:
None.
Changes in v4:
Patch is new (Eric's suggestion).
drivers/scsi/fcoe/fcoe_sysfs.c | 9 +++++++--
drivers/scsi/fcoe/fcoe_transport.c | 24 +++++++++++++++---------
drivers/scsi/libfc/fc_rport.c | 5 ++++-
include/scsi/fcoe_sysfs.h | 12 ++++++------
include/scsi/libfc.h | 2 +-
include/scsi/libfcoe.h | 8 ++++----
6 files changed, 37 insertions(+), 23 deletions(-)
diff --git a/drivers/scsi/fcoe/fcoe_sysfs.c b/drivers/scsi/fcoe/fcoe_sysfs.c
index af658aa38fed..a197e66ffa8a 100644
--- a/drivers/scsi/fcoe/fcoe_sysfs.c
+++ b/drivers/scsi/fcoe/fcoe_sysfs.c
@@ -139,8 +139,13 @@ static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
char *buf) \
{ \
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
- if (ctlr->f->get_fcoe_ctlr_##field) \
- ctlr->f->get_fcoe_ctlr_##field(ctlr); \
+ int err; \
+ \
+ if (ctlr->f->get_fcoe_ctlr_##field) { \
+ err = ctlr->f->get_fcoe_ctlr_##field(ctlr); \
+ if (err) \
+ return err; \
+ } \
return snprintf(buf, sz, format_string, \
cast fcoe_ctlr_##field(ctlr)); \
}
diff --git a/drivers/scsi/fcoe/fcoe_transport.c b/drivers/scsi/fcoe/fcoe_transport.c
index 213ee9efb044..5d19650e9bc1 100644
--- a/drivers/scsi/fcoe/fcoe_transport.c
+++ b/drivers/scsi/fcoe/fcoe_transport.c
@@ -166,15 +166,16 @@ EXPORT_SYMBOL_GPL(fcoe_link_speed_update);
* Note, the Link Error Status Block (LESB) for FCoE is defined in FC-BB-6
* Clause 7.11 in v1.04.
*/
-void __fcoe_get_lesb(struct fc_lport *lport,
- struct fc_els_lesb *fc_lesb,
- struct net_device *netdev)
+int __fcoe_get_lesb(struct fc_lport *lport,
+ struct fc_els_lesb *fc_lesb,
+ struct net_device *netdev)
{
struct rtnl_link_stats64 dev_stats;
unsigned int cpu;
u32 lfc, vlfc, mdac;
struct fc_stats *stats;
struct fcoe_fc_els_lesb *lesb;
+ int err;
lfc = 0;
vlfc = 0;
@@ -190,8 +191,14 @@ void __fcoe_get_lesb(struct fc_lport *lport,
lesb->lesb_link_fail = htonl(lfc);
lesb->lesb_vlink_fail = htonl(vlfc);
lesb->lesb_miss_fka = htonl(mdac);
- dev_get_stats(netdev, &dev_stats);
+
+ err = dev_get_stats(netdev, &dev_stats);
+ if (err)
+ return err;
+
lesb->lesb_fcs_error = htonl(dev_stats.rx_crc_errors);
+
+ return 0;
}
EXPORT_SYMBOL_GPL(__fcoe_get_lesb);
@@ -200,12 +207,11 @@ EXPORT_SYMBOL_GPL(__fcoe_get_lesb);
* @lport: the local port
* @fc_lesb: the link error status block
*/
-void fcoe_get_lesb(struct fc_lport *lport,
- struct fc_els_lesb *fc_lesb)
+int fcoe_get_lesb(struct fc_lport *lport, struct fc_els_lesb *fc_lesb)
{
struct net_device *netdev = fcoe_get_netdev(lport);
- __fcoe_get_lesb(lport, fc_lesb, netdev);
+ return __fcoe_get_lesb(lport, fc_lesb, netdev);
}
EXPORT_SYMBOL_GPL(fcoe_get_lesb);
@@ -215,14 +221,14 @@ EXPORT_SYMBOL_GPL(fcoe_get_lesb);
* @ctlr_dev: The given fcoe controller device
*
*/
-void fcoe_ctlr_get_lesb(struct fcoe_ctlr_device *ctlr_dev)
+int fcoe_ctlr_get_lesb(struct fcoe_ctlr_device *ctlr_dev)
{
struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev);
struct net_device *netdev = fcoe_get_netdev(fip->lp);
struct fc_els_lesb *fc_lesb;
fc_lesb = (struct fc_els_lesb *)(&ctlr_dev->lesb);
- __fcoe_get_lesb(fip->lp, fc_lesb, netdev);
+ return __fcoe_get_lesb(fip->lp, fc_lesb, netdev);
}
EXPORT_SYMBOL_GPL(fcoe_ctlr_get_lesb);
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 56003208d2e7..cb299fef7a78 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1633,6 +1633,7 @@ static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata,
struct fc_els_lesb *lesb;
struct fc_seq_els_data rjt_data;
struct fc_host_statistics *hst;
+ int err;
lockdep_assert_held(&rdata->rp_mutex);
@@ -1659,7 +1660,9 @@ static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata,
lesb = &rsp->rls_lesb;
if (lport->tt.get_lesb) {
/* get LESB from LLD if it supports it */
- lport->tt.get_lesb(lport, lesb);
+ err = lport->tt.get_lesb(lport, lesb);
+ if (err)
+ goto out_rjt;
} else {
fc_get_host_stats(lport->host);
hst = &lport->host_stats;
diff --git a/include/scsi/fcoe_sysfs.h b/include/scsi/fcoe_sysfs.h
index 4b1216de3f22..076b593f2625 100644
--- a/include/scsi/fcoe_sysfs.h
+++ b/include/scsi/fcoe_sysfs.h
@@ -16,12 +16,12 @@ struct fcoe_ctlr_device;
struct fcoe_fcf_device;
struct fcoe_sysfs_function_template {
- void (*get_fcoe_ctlr_link_fail)(struct fcoe_ctlr_device *);
- void (*get_fcoe_ctlr_vlink_fail)(struct fcoe_ctlr_device *);
- void (*get_fcoe_ctlr_miss_fka)(struct fcoe_ctlr_device *);
- void (*get_fcoe_ctlr_symb_err)(struct fcoe_ctlr_device *);
- void (*get_fcoe_ctlr_err_block)(struct fcoe_ctlr_device *);
- void (*get_fcoe_ctlr_fcs_error)(struct fcoe_ctlr_device *);
+ int (*get_fcoe_ctlr_link_fail)(struct fcoe_ctlr_device *);
+ int (*get_fcoe_ctlr_vlink_fail)(struct fcoe_ctlr_device *);
+ int (*get_fcoe_ctlr_miss_fka)(struct fcoe_ctlr_device *);
+ int (*get_fcoe_ctlr_symb_err)(struct fcoe_ctlr_device *);
+ int (*get_fcoe_ctlr_err_block)(struct fcoe_ctlr_device *);
+ int (*get_fcoe_ctlr_fcs_error)(struct fcoe_ctlr_device *);
void (*set_fcoe_ctlr_mode)(struct fcoe_ctlr_device *);
int (*set_fcoe_ctlr_enabled)(struct fcoe_ctlr_device *);
void (*get_fcoe_fcf_selected)(struct fcoe_fcf_device *);
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 9b87e1a1c646..510654796db5 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -501,7 +501,7 @@ struct libfc_function_template {
*
* STATUS: OPTIONAL
*/
- void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);
+ int (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);
/*
* Reset an exchange manager, completing all sequences and exchanges.
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index 2568cb0627ec..a42cbe847ce6 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -255,13 +255,13 @@ int fcoe_libfc_config(struct fc_lport *, struct fcoe_ctlr *,
u32 fcoe_fc_crc(struct fc_frame *fp);
int fcoe_start_io(struct sk_buff *skb);
int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type);
-void __fcoe_get_lesb(struct fc_lport *lport, struct fc_els_lesb *fc_lesb,
- struct net_device *netdev);
+int __fcoe_get_lesb(struct fc_lport *lport, struct fc_els_lesb *fc_lesb,
+ struct net_device *netdev);
void fcoe_wwn_to_str(u64 wwn, char *buf, int len);
int fcoe_validate_vport_create(struct fc_vport *vport);
int fcoe_link_speed_update(struct fc_lport *);
-void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
-void fcoe_ctlr_get_lesb(struct fcoe_ctlr_device *ctlr_dev);
+int fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
+int fcoe_ctlr_get_lesb(struct fcoe_ctlr_device *ctlr_dev);
/**
* is_fip_mode() - returns true if FIP mode selected.
--
2.25.1
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