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Date: Sat, 20 Jul 2013 19:53:54 +0200 From: Jiri Pirko <jiri@...nulli.us> To: netdev@...r.kernel.org Cc: davem@...emloft.net, stephen@...workplumber.org, Narendra_K@...l.com, bhutchings@...arflare.com, john.r.fastabend@...el.com Subject: [patch net-next v2 3/3] net: export physical port id via sysfs Signed-off-by: Jiri Pirko <jiri@...nulli.us> --- net/core/net-sysfs.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 981fed3..56b4635 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -334,6 +334,47 @@ static ssize_t store_group(struct device *dev, struct device_attribute *attr, return netdev_store(dev, attr, buf, len, change_group); } +static size_t _format_port_id(char *buf, int buflen, + const unsigned char *id, int len) +{ + int i; + char *cp = buf; + + for (i = 0; i < len; i++) + cp += scnprintf(cp, buflen - (cp - buf), "%02x", id[i]); + return cp - buf; +} + +ssize_t sysfs_format_port_id(char *buf, const unsigned char *id, int len) +{ + size_t l; + + l = _format_port_id(buf, PAGE_SIZE, id, len); + l += scnprintf(buf + l, PAGE_SIZE - l, "\n"); + return (ssize_t)l; +} + +static ssize_t show_phys_port_id(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct net_device *netdev = to_net_dev(dev); + ssize_t ret = -EINVAL; + + if (!rtnl_trylock()) + return restart_syscall(); + + if (dev_isalive(netdev)) { + struct netdev_phys_port_id ppid; + + ret = dev_get_phys_port_id(netdev, &ppid); + if (!ret) + ret = sysfs_format_port_id(buf, ppid.id, ppid.id_len); + } + rtnl_unlock(); + + return ret; +} + static struct device_attribute net_class_attributes[] = { __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), @@ -355,6 +396,7 @@ static struct device_attribute net_class_attributes[] = { __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, store_tx_queue_len), __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), + __ATTR(phys_port_id, S_IRUGO, show_phys_port_id, NULL), {} }; -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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