From: Giridhar Malavali <giridhar.malavali@xxxxxxxxxx>
Date: April 17, 2009 6:01:30 PM PDT
To: James Smart <James.Smart@xxxxxxxxxx>
Cc: linux-scsi@xxxxxxxxxxxxxxx
Subject: Patch - To display FCoE Host information and statistics in
sysfs
Hi All,
Attached is the patch for displaying FCoE Host bus adapter
information in sysfs.
This patch adds fcoe directory (/sys/class/fc_host/hostX/fcoe)
and a
statistics sub-directory (/sys/class/fc_host/hostX/fcoe/statistics)
to display FCoE host specific and it statistics respectively.
A new port type definition called VF_PORT (Virtual Fabric Port) is
added to identify the virtual link between ENode and the FCF
switch.
The contents in the fcoe and its sub-directory will be valid, if
the
FC port type is a VF_PORT.
Following are the members added to display host specific
information
under /sys/class/fc_host/hostX/fcoe directory
1) enode_mac_address - The burnt in MAC address used by the
FCoE
adapter
2) vn_port_mac_address - The current MAC address used by the
FCoE
adapter. This can be same as ENode MAC address or different based
on
the MAC addressing mode.
3) vf_port_mac_address - MAC address of the FCF.
4) mac_addressing_mode - The type of FCoE MAC addressing mode
FCF_SELECTED - The FCF selects either SPMA or FPMA
addressing mode
SPMA_ONLY - Only SPMA addressing mode is supported by
ENode
FPMA_ONLY - Only FPMA addressing mode is supported by
ENode
SPMA_PREFERRED - SPMA addressing mode is preferred by
ENode
FPMA_PREFERRED - FPMA addressing mode is preferred by
ENode
5) vlan_id - The Vlan ID used
Following counters are added to display host statistics information
under /sys/class/fc_host/hostX/fcoe/statistics directory
The statistics information displayed is similar to FC host
statistics. The FCoE statistics carries the same naming as FC host
statistics but the information displayed are mapped to related MAC
statistics.
This information is based on the proposal made to T11 for
mapping
FC LESB ( Link Error Status Block) to FC_BB_E. Please refer to FCoE
Link Error Status Block (09-204v1.pdf) document at www.t11.org/index.html
.
The various counters are
1) Invalid_crc_count
2) Invalid_tx_word_count
3) link_failure_count
4) loss_of_signal_count
5) loss_of_sync_count
6) prim_seq_protocol_error.
Thanks,
Giridhar.M.B
From: Giridhar Malavali <giridhar.malavali@xxxxxxxxxx>
Date: Fri, 17 Apr 2009 15:51:42 -0700
Subject: [PATCH 1/2] Addition of FCoE information to sysfs.
The information contains both FCoE host specific as well as its
statistics.
The FCoE specific information are displayed under /sys/class/
fc_host/
hostX/fcoe
and /sys/class/fc_host/hostX/fcoe/statistics directories
respectively.
Signed-off-by: Giridhar Malavali <giridhar.malavali@xxxxxxxxxx>
---
drivers/scsi/scsi_transport_fc.c | 292 ++++++++++++++++++++++++++
+++
++++-----
include/scsi/scsi_transport_fc.h | 53 +++++++
2 files changed, 311 insertions(+), 34 deletions(-)
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/
scsi_transport_fc.c
index a152f89..55e3757 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -44,6 +44,18 @@ static int fc_vport_setup(struct Scsi_Host
*shost, int channel,
struct device *pdev, struct fc_vport_identifiers *ids,
struct fc_vport **vport);
+/* Kobjects for /sys/class/fc_host/hostx/fcoe
+ * and /sys/class/fc_host/hostx/fcoe/statistics objects
+ */
+struct kobject *private_fcoe_kobj;
+struct kobject *private_fcoe_stat_kobj;
+
+/* Kobject attributes defined for /sys/class/fc_host/hostx/fcoe
+ * and /sys/class/fc_host/hostx/fcoe/statistics objects
+ */
+#define
FCOE_KOBJECT_ATTR(_prefix,_name,_mode,_show,_store) \
+struct kobj_attribute kobject_attr_##_prefix##_##_name
= \
+ __ATTR(_name,_mode,_show,_store)
/*
* Redefine so that we can have same named attributes in the
* sdev/starget/host objects.
@@ -97,6 +109,7 @@ static struct {
{ FC_PORTTYPE_LPORT, "LPort (private loop)" },
{ FC_PORTTYPE_PTP, "Point-To-Point (direct nport
connection)" },
{ FC_PORTTYPE_NPIV, "NPIV VPORT" },
+ { FC_PORTTYPE_VFPORT, "VFPort (Virtual fabric via
point-to-
point)" },
};
fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
#define FC_PORTTYPE_MAX_NAMELEN 50
@@ -414,12 +427,6 @@ static int fc_host_setup(struct
transport_container *tc, struct device *dev,
return 0;
}
-static DECLARE_TRANSPORT_CLASS(fc_host_class,
- "fc_host",
- fc_host_setup,
- NULL,
- NULL);
-
/*
* Setup and Remove actions for remote ports are handled
* in the service functions below.
@@ -617,34 +624,6 @@ send_vendor_fail:
}
EXPORT_SYMBOL(fc_host_post_vendor_event);
-
-
-static __init int fc_transport_init(void)
-{
- int error;
-
- atomic_set(&fc_event_seq, 0);
-
- error = transport_class_register(&fc_host_class);
- if (error)
- return error;
- error = transport_class_register(&fc_vport_class);
- if (error)
- return error;
- error = transport_class_register(&fc_rport_class);
- if (error)
- return error;
- return transport_class_register(&fc_transport_class);
-}
-
-static void __exit fc_transport_exit(void)
-{
- transport_class_unregister(&fc_transport_class);
- transport_class_unregister(&fc_rport_class);
- transport_class_unregister(&fc_host_class);
- transport_class_unregister(&fc_vport_class);
-}
-
/*
* FC Remote Port Attribute Management
*/
@@ -1655,6 +1634,224 @@ static struct attribute_group
fc_statistics_group = {
.attrs = fc_statistics_attrs,
};
+/*
+ * FCoE Host attributes
+ */
+
+/* Convert mac_addressing_mode values to ascii string name */
+static struct {
+ enum fcoe_mac_addressing_mode value;
+ char *name;
+} mac_addressing_mode_names [] = {
+ { FCF_SELECTED, "FCF selcted - Either FPMA
or SPMA" },
+ { SPMA_ONLY, "SPMA only - ENode
Solicites SPMA only support" },
+ { FPMA_ONLY, "FPMA only - ENode
Solicites SPMA only support" },
+ { SPMA_PREFERRED, "SPMA preferred - ENode
Solicites SPMA
preferred support" },
+ { FPMA_PREFERRED, "FPMA preferred - ENode
Solicites FPMA
preferred support" },
+};
+fc_enum_name_search(mac_addressing_mode, fcoe_mac_addressing_mode,
mac_addressing_mode_names)
+#define FCOE_MAC_ADDR_MODE_MAX_NAMELEN 80
+
+/* Show MAC address members of the FCoE host attributes */
+static ssize_t
+fcoe_host_attrs_show(const struct kobject *kobj, char *buf,
unsigned long offset)
+{
+ struct device *dev = kobj_to_dev(kobj->parent);
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fcoe_host_attrs *stats;
+ ssize_t ret = -ENOENT;
+
+ if (i->f->get_fcoe_host) {
+ stats = (i->f->get_fcoe_host)(shost);
+ if (stats)
+ ret = snprintf(buf, 20, "0x%x\n",
+ *(u16 *)(((u8 *) stats) + offset));
+ }
+ return ret;
+}
+
+/* generate a read-only FCoE Host attribute */
+#define
fcoe_host_attrs
(name) \
+static ssize_t show_fcoe_host_attrs_##name(struct kobject
*cd, \
+ struct kobj_attribute
*attr, \
+ char
*buf) \
+
{ \
+ return fcoe_host_attrs_show(cd,
buf, \
+ offsetof(struct fcoe_host_attrs,
name)); \
+
} \
+static FCOE_KOBJECT_ATTR(fcoe, name, S_IRUGO,
show_fcoe_host_attrs_##name, NULL)
+
+fcoe_host_attrs(vlan_id);
+
+#define fcoe_host_attrs_enum_attr(title,
maxlen) \
+static ssize_t show_fcoe_host_attrs_##title(struct kobject
*kobj, \
+ struct kobj_attribute
*attr, \
+ char
*buf) \
+
{ \
+ struct device *dev = kobj_to_dev(kobj-
>parent); \
+ struct Scsi_Host *shost =
transport_class_to_shost(dev); \
+ struct fc_internal *i = to_fc_internal(shost-
>transportt); \
+ struct fcoe_host_attrs
*stats; \
+ ssize_t ret = -
EINVAL; \
+ const char
*name; \
+
\
+ if (i->f->get_fcoe_host)
{ \
+ stats = (i->f->get_fcoe_host)
(shost); \
+ if(stats)
{ \
+ name = get_fc_##title##_name(stats-
>mac_addressing_mode); \
+ if
(name) \
+ ret= snprintf(buf, maxlen, "%s\n",
name); \
+
} \
+
} \
+ return
ret
; \
+
} \
+static FCOE_KOBJECT_ATTR(fcoe, title, S_IRUGO,
show_fcoe_host_attrs_##title, NULL)
+
+fcoe_host_attrs_enum_attr(mac_addressing_mode,
FCOE_MAC_ADDR_MODE_MAX_NAMELEN);
+
+static ssize_t
+fcoe_mac_addr_show(const struct kobject *kobj, char *buf, unsigned
long offset)
+{
+ struct device *dev = kobj_to_dev(kobj->parent);
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fcoe_host_attrs *stats;
+ ssize_t ret = -ENOENT;
+
+ if (offset > sizeof(struct fcoe_host_attrs))
+ WARN_ON(1);
+
+ if (i->f->get_fcoe_host) {
+ stats = (i->f->get_fcoe_host)(shost);
+ if (stats) {
+ u8 *macaddr = (u8*)(((u8 *) stats) + offset);
+ ret = sysfs_format_mac(buf, macaddr, 6);
+ }
+ }
+ return ret;
+}
+
+/* generate a read-only FCoE MAC address host attribute */
+#define
fcoe_mac_addr(name) \
+static ssize_t show_fcoe_mac_addr_##name(struct kobject
*cd, \
+ struct kobj_attribute
*attr, \
+ char
*buf) \
+
{ \
+ return fcoe_mac_addr_show(cd,
buf, \
+ offsetof(struct fcoe_host_attrs,
name)); \
+
} \
+static FCOE_KOBJECT_ATTR(fcoe, name, S_IRUGO,
show_fcoe_mac_addr_##name, NULL)
+
+fcoe_mac_addr(enode_mac_address);
+fcoe_mac_addr(vn_port_mac_address);
+fcoe_mac_addr(vf_port_mac_address);
+
+static struct attribute *fcoe_host_attrs[] = {
+ &kobject_attr_fcoe_enode_mac_address.attr,
+ &kobject_attr_fcoe_vn_port_mac_address.attr,
+ &kobject_attr_fcoe_vf_port_mac_address.attr,
+ &kobject_attr_fcoe_vlan_id.attr,
+ &kobject_attr_fcoe_mac_addressing_mode.attr,
+ NULL
+};
+
+static struct attribute_group fcoe_host_attrs_group = {
+ .attrs = fcoe_host_attrs,
+};
+
+/* Read FCoE host statistics */
+static ssize_t
+fcoe_host_statistics_show(const struct kobject *kobj, char *buf,
unsigned long offset)
+{
+ struct device *dev = kobj_to_dev(kobj->parent->parent);
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fcoe_host_statistics *stats;
+ ssize_t ret = -ENOENT;
+
+ if (offset > sizeof(struct fcoe_host_statistics) ||
+ offset % sizeof(u64) != 0)
+ WARN_ON(1);
+
+ if (i->f->get_fcoe_host_stats) {
+ stats = (i->f->get_fcoe_host_stats)(shost);
+ if (stats)
+ ret = snprintf(buf, 20, "0x%llx\n",
+ (unsigned long long)*(u64 *)(((u8 *)
stats) + offset));
+ }
+ return ret;
+}
+
+/* generate a read-only FCoE host staistics attribute */
+#define
fcoe_host_statistics
(name) \
+static ssize_t show_fcoe_host_statistics_##name(struct kobject
*cd, \
+ struct kobj_attribute
*attr, \
+ char
*buf) \
+
{ \
+ return fcoe_host_statistics_show(cd,
buf, \
+ offsetof(struct fcoe_host_statistics,
name)); \
+
} \
+static FCOE_KOBJECT_ATTR(fcoe, name, S_IRUGO,
show_fcoe_host_statistics_##name, NULL)
+
+fcoe_host_statistics(link_failure_count);
+fcoe_host_statistics(loss_of_sync_count);
+fcoe_host_statistics(loss_of_signal_count);
+fcoe_host_statistics(prim_seq_protocol_err_count);
+fcoe_host_statistics(invalid_tx_word_count);
+fcoe_host_statistics(invalid_crc_count);
+
+static struct attribute *fcoe_host_statistics[] = {
+ &kobject_attr_fcoe_link_failure_count.attr,
+ &kobject_attr_fcoe_loss_of_sync_count.attr,
+ &kobject_attr_fcoe_loss_of_signal_count.attr,
+ &kobject_attr_fcoe_prim_seq_protocol_err_count.attr,
+ &kobject_attr_fcoe_invalid_tx_word_count.attr,
+ &kobject_attr_fcoe_invalid_crc_count.attr,
+ NULL
+};
+
+static struct attribute_group fcoe_host_statistics_group = {
+ .attrs = fcoe_host_statistics,
+};
+
+static int fc_host_configure(struct transport_container *tc,
struct
device *dev,
+ struct device *cdev)
+{
+ int error;
+
+ /* Create a fcoe sub-directory under /sys/class/fc_host/
hostX/ */
+ private_fcoe_kobj = kobject_create_and_add("fcoe", &cdev-
>kobj);
+ if (private_fcoe_kobj) {
+ /* Create the files associated with this kobject */
+ error = sysfs_create_group(private_fcoe_kobj,
&fcoe_host_attrs_group);
+ if (error) {
+ kobject_put(private_fcoe_kobj);
+ goto error;
+ }
+ }
+
+ /* Create a statistics sub-directory under /sys/class/
fc_host/
hostX/fcoe/ */
+ private_fcoe_stat_kobj = kobject_create_and_add("statistics",
private_fcoe_kobj);
+ if (private_fcoe_stat_kobj) {
+ /* Create the files associated with this kobject */
+ error = sysfs_create_group(private_fcoe_stat_kobj,
&fcoe_host_statistics_group);
+ if (error) {
+ kobject_put(private_fcoe_stat_kobj);
+ goto error;
+ }
+ }
+
+error:
+ return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(fc_host_class,
+ "fc_host",
+ fc_host_setup,
+ NULL,
+ fc_host_configure);
+
/* Host Vport Attributes */
@@ -3342,6 +3539,33 @@ fc_vport_sched_delete(struct work_struct
*work)
vport->channel, stat);
}
+static __init int fc_transport_init(void)
+{
+ int error;
+
+ atomic_set(&fc_event_seq, 0);
+
+ error = transport_class_register(&fc_host_class);
+ if (error)
+ return error;
+ error = transport_class_register(&fc_vport_class);
+ if (error)
+ return error;
+ error = transport_class_register(&fc_rport_class);
+ if (error)
+ return error;
+ return transport_class_register(&fc_transport_class);
+}
+
+static void __exit fc_transport_exit(void)
+{
+ transport_class_unregister(&fc_transport_class);
+ transport_class_unregister(&fc_rport_class);
+ transport_class_unregister(&fc_host_class);
+ transport_class_unregister(&fc_vport_class);
+ kobject_put(private_fcoe_kobj);
+ kobject_put(private_fcoe_stat_kobj);
+}
/* Original Author: Martin Hicks */
MODULE_AUTHOR("James Smart");
diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/
scsi_transport_fc.h
index c9184f7..def2e23 100644
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -30,6 +30,8 @@
#include <linux/sched.h>
#include <scsi/scsi.h>
#include <scsi/scsi_netlink.h>
+#include <scsi/scsi_netlink.h>
+#include <linux/etherdevice.h>
struct scsi_transport_template;
@@ -63,6 +65,7 @@ enum fc_port_type {
FC_PORTTYPE_LPORT, /* (Private) Loop w/o FLPort */
FC_PORTTYPE_PTP, /* Point to Point w/ another
NPort */
FC_PORTTYPE_NPIV, /* VPORT based on NPIV */
+ FC_PORTTYPE_VFPORT, /* Virtual Fabric PORT */
};
@@ -428,6 +431,53 @@ struct fc_host_statistics {
u64 fcp_output_megabytes;
};
+/*
+ * FCoE Local Port (Host) Attributes
+ *
+ * Fixed attributes are not expected to change. The driver is
+ * expected to set these values after successfully calling
scsi_add_host().
+ * The transport fully manages all get functions w/o driver
interaction.
+ *
+ * Dynamic attributes are expected to change. The driver
participates
+ * in all get/set operations via functions provided by the driver.
+ *
+ */
+struct fcoe_host_attrs {
+ /* Fixed attributes */
+ uint8_t enode_mac_address[ETH_ALEN];
+
+ /* Dynamic attributes */
+ uint8_t vn_port_mac_address[ETH_ALEN];
+ uint8_t vf_port_mac_address[ETH_ALEN];
+ u16 vlan_id;
+ u16 mac_addressing_mode;
+};
+
+/* FCoE Statistics - Following proposal for FC_BB_E FC Link error
status block representation
+ * from T11/09-204v0 guidelines
+ */
+struct fcoe_host_statistics {
+ /* Port statistics */
+ u64 link_failure_count;
+ u64 loss_of_sync_count;
+ u64 loss_of_signal_count;
+ u64 prim_seq_protocol_err_count;
+ u64 invalid_tx_word_count;
+ u64 invalid_crc_count;
+};
+
+
+/*
+ * mac_addressing_mode: If you alter this, you also need to alter
+ * scsi_transport_fc.c (for the ascii descriptions).
+ */
+enum fcoe_mac_addressing_mode {
+ FCF_SELECTED,
+ SPMA_ONLY,
+ FPMA_ONLY,
+ SPMA_PREFERRED,
+ FPMA_PREFERRED,
+};
/*
* FC Event Codes - Polled and Async, following FC HBAAPI v2.0
guidelines
@@ -600,6 +650,9 @@ struct fc_function_template {
struct fc_host_statistics * (*get_fc_host_stats)(struct
Scsi_Host *);
void (*reset_fc_host_stats)(struct Scsi_Host *);
+ struct fcoe_host_attrs* (*get_fcoe_host)(struct Scsi_Host *);
+ struct fcoe_host_statistics* (*get_fcoe_host_stats)(struct
Scsi_Host *);
+
int (*issue_fc_host_lip)(struct Scsi_Host *);
void (*dev_loss_tmo_callbk)(struct fc_rport *);
--
1.6.2.rc1.30.gd43c
