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[PATCH] iseries_veth: Add sysfs support for connection structs 

To aid in field debugging, add sysfs support for iseries_veth's connection
structures. At the moment this is all read-only, however we could think about
adding write support for some attributes in future.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Michael Ellerman 2005-09-01 11:29:20 +10:00 committed by Jeff Garzik
parent db5e8718ea
commit 76812d8123
1 changed files with 90 additions and 4 deletions
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94
drivers/net/iseries_veth.c
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@ -182,10 +182,6 @@ static void veth_release_connection(struct kobject *kobject);
static void veth_timed_ack(unsigned long ptr);
static void veth_timed_reset(unsigned long ptr);
static struct kobj_type veth_lpar_connection_ktype = {
.release = veth_release_connection
};
/*
* Utility functions
*/
@ -279,6 +275,81 @@ static int veth_allocate_events(HvLpIndex rlp, int number)
return vc.num;
}
/*
* sysfs support
*/
struct veth_cnx_attribute {
struct attribute attr;
ssize_t (*show)(struct veth_lpar_connection *, char *buf);
ssize_t (*store)(struct veth_lpar_connection *, const char *buf);
};
static ssize_t veth_cnx_attribute_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
struct veth_cnx_attribute *cnx_attr;
struct veth_lpar_connection *cnx;
cnx_attr = container_of(attr, struct veth_cnx_attribute, attr);
cnx = container_of(kobj, struct veth_lpar_connection, kobject);
if (!cnx_attr->show)
return -EIO;
return cnx_attr->show(cnx, buf);
}
#define CUSTOM_CNX_ATTR(_name, _format, _expression) \
static ssize_t _name##_show(struct veth_lpar_connection *cnx, char *buf)\
{ \
return sprintf(buf, _format, _expression); \
} \
struct veth_cnx_attribute veth_cnx_attr_##_name = __ATTR_RO(_name)
#define SIMPLE_CNX_ATTR(_name) \
CUSTOM_CNX_ATTR(_name, "%lu\n", (unsigned long)cnx->_name)
SIMPLE_CNX_ATTR(outstanding_tx);
SIMPLE_CNX_ATTR(remote_lp);
SIMPLE_CNX_ATTR(num_events);
SIMPLE_CNX_ATTR(src_inst);
SIMPLE_CNX_ATTR(dst_inst);
SIMPLE_CNX_ATTR(num_pending_acks);
SIMPLE_CNX_ATTR(num_ack_events);
CUSTOM_CNX_ATTR(ack_timeout, "%d\n", jiffies_to_msecs(cnx->ack_timeout));
CUSTOM_CNX_ATTR(reset_timeout, "%d\n", jiffies_to_msecs(cnx->reset_timeout));
CUSTOM_CNX_ATTR(state, "0x%.4lX\n", cnx->state);
CUSTOM_CNX_ATTR(last_contact, "%d\n", cnx->last_contact ?
jiffies_to_msecs(jiffies - cnx->last_contact) : 0);
#define GET_CNX_ATTR(_name) (&veth_cnx_attr_##_name.attr)
static struct attribute *veth_cnx_default_attrs[] = {
GET_CNX_ATTR(outstanding_tx),
GET_CNX_ATTR(remote_lp),
GET_CNX_ATTR(num_events),
GET_CNX_ATTR(reset_timeout),
GET_CNX_ATTR(last_contact),
GET_CNX_ATTR(state),
GET_CNX_ATTR(src_inst),
GET_CNX_ATTR(dst_inst),
GET_CNX_ATTR(num_pending_acks),
GET_CNX_ATTR(num_ack_events),
GET_CNX_ATTR(ack_timeout),
NULL
};
static struct sysfs_ops veth_cnx_sysfs_ops = {
.show = veth_cnx_attribute_show
};
static struct kobj_type veth_lpar_connection_ktype = {
.release = veth_release_connection,
.sysfs_ops = &veth_cnx_sysfs_ops,
.default_attrs = veth_cnx_default_attrs
};
/*
* LPAR connection code
*/
@ -1493,6 +1564,8 @@ void __exit veth_module_cleanup(void)
if (!cnx)
continue;
/* Remove the connection from sysfs */
kobject_del(&cnx->kobject);
/* Drop the driver's reference to the connection */
kobject_put(&cnx->kobject);
}
@ -1523,6 +1596,19 @@ int __init veth_module_init(void)
if (rc != 0)
goto error;
for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
struct kobject *kobj;
if (!veth_cnx[i])
continue;
kobj = &veth_cnx[i]->kobject;
kobj->parent = &veth_driver.driver.kobj;
/* If the add failes, complain but otherwise continue */
if (0 != kobject_add(kobj))
veth_error("cnx %d: Failed adding to sysfs.\n", i);
}
return 0;
error: