From 76812d81238cda5c5c4060da27517a08287620fc Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Thu, 1 Sep 2005 11:29:20 +1000 Subject: [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 Signed-off-by: Jeff Garzik --- drivers/net/iseries_veth.c | 94 ++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 90 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/net/iseries_veth.c b/drivers/net/iseries_veth.c index b945bf02d257..25481ea67474 100644 --- a/drivers/net/iseries_veth.c +++ b/drivers/net/iseries_veth.c @@ -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: -- cgit v1.2.3