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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/core/net-sysfs.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'net/core/net-sysfs.c')
-rw-r--r-- | net/core/net-sysfs.c | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c new file mode 100644 index 0000000..060f703 --- /dev/null +++ b/net/core/net-sysfs.c @@ -0,0 +1,461 @@ +/* + * net-sysfs.c - network device class and attributes + * + * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/if_arp.h> +#include <net/sock.h> +#include <linux/rtnetlink.h> +#include <linux/wireless.h> + +#define to_class_dev(obj) container_of(obj,struct class_device,kobj) +#define to_net_dev(class) container_of(class, struct net_device, class_dev) + +static const char fmt_hex[] = "%#x\n"; +static const char fmt_dec[] = "%d\n"; +static const char fmt_ulong[] = "%lu\n"; + +static inline int dev_isalive(const struct net_device *dev) +{ + return dev->reg_state == NETREG_REGISTERED; +} + +/* use same locking rules as GIF* ioctl's */ +static ssize_t netdev_show(const struct class_device *cd, char *buf, + ssize_t (*format)(const struct net_device *, char *)) +{ + struct net_device *net = to_net_dev(cd); + ssize_t ret = -EINVAL; + + read_lock(&dev_base_lock); + if (dev_isalive(net)) + ret = (*format)(net, buf); + read_unlock(&dev_base_lock); + + return ret; +} + +/* generate a show function for simple field */ +#define NETDEVICE_SHOW(field, format_string) \ +static ssize_t format_##field(const struct net_device *net, char *buf) \ +{ \ + return sprintf(buf, format_string, net->field); \ +} \ +static ssize_t show_##field(struct class_device *cd, char *buf) \ +{ \ + return netdev_show(cd, buf, format_##field); \ +} + + +/* use same locking and permission rules as SIF* ioctl's */ +static ssize_t netdev_store(struct class_device *dev, + const char *buf, size_t len, + int (*set)(struct net_device *, unsigned long)) +{ + struct net_device *net = to_net_dev(dev); + char *endp; + unsigned long new; + int ret = -EINVAL; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + new = simple_strtoul(buf, &endp, 0); + if (endp == buf) + goto err; + + rtnl_lock(); + if (dev_isalive(net)) { + if ((ret = (*set)(net, new)) == 0) + ret = len; + } + rtnl_unlock(); + err: + return ret; +} + +/* generate a read-only network device class attribute */ +#define NETDEVICE_ATTR(field, format_string) \ +NETDEVICE_SHOW(field, format_string) \ +static CLASS_DEVICE_ATTR(field, S_IRUGO, show_##field, NULL) \ + +NETDEVICE_ATTR(addr_len, fmt_dec); +NETDEVICE_ATTR(iflink, fmt_dec); +NETDEVICE_ATTR(ifindex, fmt_dec); +NETDEVICE_ATTR(features, fmt_hex); +NETDEVICE_ATTR(type, fmt_dec); + +/* use same locking rules as GIFHWADDR ioctl's */ +static ssize_t format_addr(char *buf, const unsigned char *addr, int len) +{ + int i; + char *cp = buf; + + for (i = 0; i < len; i++) + cp += sprintf(cp, "%02x%c", addr[i], + i == (len - 1) ? '\n' : ':'); + return cp - buf; +} + +static ssize_t show_address(struct class_device *dev, char *buf) +{ + struct net_device *net = to_net_dev(dev); + ssize_t ret = -EINVAL; + + read_lock(&dev_base_lock); + if (dev_isalive(net)) + ret = format_addr(buf, net->dev_addr, net->addr_len); + read_unlock(&dev_base_lock); + return ret; +} + +static ssize_t show_broadcast(struct class_device *dev, char *buf) +{ + struct net_device *net = to_net_dev(dev); + if (dev_isalive(net)) + return format_addr(buf, net->broadcast, net->addr_len); + return -EINVAL; +} + +static ssize_t show_carrier(struct class_device *dev, char *buf) +{ + struct net_device *netdev = to_net_dev(dev); + if (netif_running(netdev)) { + return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); + } + return -EINVAL; +} + +static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL); +static CLASS_DEVICE_ATTR(broadcast, S_IRUGO, show_broadcast, NULL); +static CLASS_DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL); + +/* read-write attributes */ +NETDEVICE_SHOW(mtu, fmt_dec); + +static int change_mtu(struct net_device *net, unsigned long new_mtu) +{ + return dev_set_mtu(net, (int) new_mtu); +} + +static ssize_t store_mtu(struct class_device *dev, const char *buf, size_t len) +{ + return netdev_store(dev, buf, len, change_mtu); +} + +static CLASS_DEVICE_ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu); + +NETDEVICE_SHOW(flags, fmt_hex); + +static int change_flags(struct net_device *net, unsigned long new_flags) +{ + return dev_change_flags(net, (unsigned) new_flags); +} + +static ssize_t store_flags(struct class_device *dev, const char *buf, size_t len) +{ + return netdev_store(dev, buf, len, change_flags); +} + +static CLASS_DEVICE_ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags); + +NETDEVICE_SHOW(tx_queue_len, fmt_ulong); + +static int change_tx_queue_len(struct net_device *net, unsigned long new_len) +{ + net->tx_queue_len = new_len; + return 0; +} + +static ssize_t store_tx_queue_len(struct class_device *dev, const char *buf, size_t len) +{ + return netdev_store(dev, buf, len, change_tx_queue_len); +} + +static CLASS_DEVICE_ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, + store_tx_queue_len); + + +static struct class_device_attribute *net_class_attributes[] = { + &class_device_attr_ifindex, + &class_device_attr_iflink, + &class_device_attr_addr_len, + &class_device_attr_tx_queue_len, + &class_device_attr_features, + &class_device_attr_mtu, + &class_device_attr_flags, + &class_device_attr_type, + &class_device_attr_address, + &class_device_attr_broadcast, + &class_device_attr_carrier, + NULL +}; + +/* Show a given an attribute in the statistics group */ +static ssize_t netstat_show(const struct class_device *cd, char *buf, + unsigned long offset) +{ + struct net_device *dev = to_net_dev(cd); + struct net_device_stats *stats; + ssize_t ret = -EINVAL; + + if (offset > sizeof(struct net_device_stats) || + offset % sizeof(unsigned long) != 0) + WARN_ON(1); + + read_lock(&dev_base_lock); + if (dev_isalive(dev) && dev->get_stats && + (stats = (*dev->get_stats)(dev))) + ret = sprintf(buf, fmt_ulong, + *(unsigned long *)(((u8 *) stats) + offset)); + + read_unlock(&dev_base_lock); + return ret; +} + +/* generate a read-only statistics attribute */ +#define NETSTAT_ENTRY(name) \ +static ssize_t show_##name(struct class_device *cd, char *buf) \ +{ \ + return netstat_show(cd, buf, \ + offsetof(struct net_device_stats, name)); \ +} \ +static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) + +NETSTAT_ENTRY(rx_packets); +NETSTAT_ENTRY(tx_packets); +NETSTAT_ENTRY(rx_bytes); +NETSTAT_ENTRY(tx_bytes); +NETSTAT_ENTRY(rx_errors); +NETSTAT_ENTRY(tx_errors); +NETSTAT_ENTRY(rx_dropped); +NETSTAT_ENTRY(tx_dropped); +NETSTAT_ENTRY(multicast); +NETSTAT_ENTRY(collisions); +NETSTAT_ENTRY(rx_length_errors); +NETSTAT_ENTRY(rx_over_errors); +NETSTAT_ENTRY(rx_crc_errors); +NETSTAT_ENTRY(rx_frame_errors); +NETSTAT_ENTRY(rx_fifo_errors); +NETSTAT_ENTRY(rx_missed_errors); +NETSTAT_ENTRY(tx_aborted_errors); +NETSTAT_ENTRY(tx_carrier_errors); +NETSTAT_ENTRY(tx_fifo_errors); +NETSTAT_ENTRY(tx_heartbeat_errors); +NETSTAT_ENTRY(tx_window_errors); +NETSTAT_ENTRY(rx_compressed); +NETSTAT_ENTRY(tx_compressed); + +static struct attribute *netstat_attrs[] = { + &class_device_attr_rx_packets.attr, + &class_device_attr_tx_packets.attr, + &class_device_attr_rx_bytes.attr, + &class_device_attr_tx_bytes.attr, + &class_device_attr_rx_errors.attr, + &class_device_attr_tx_errors.attr, + &class_device_attr_rx_dropped.attr, + &class_device_attr_tx_dropped.attr, + &class_device_attr_multicast.attr, + &class_device_attr_collisions.attr, + &class_device_attr_rx_length_errors.attr, + &class_device_attr_rx_over_errors.attr, + &class_device_attr_rx_crc_errors.attr, + &class_device_attr_rx_frame_errors.attr, + &class_device_attr_rx_fifo_errors.attr, + &class_device_attr_rx_missed_errors.attr, + &class_device_attr_tx_aborted_errors.attr, + &class_device_attr_tx_carrier_errors.attr, + &class_device_attr_tx_fifo_errors.attr, + &class_device_attr_tx_heartbeat_errors.attr, + &class_device_attr_tx_window_errors.attr, + &class_device_attr_rx_compressed.attr, + &class_device_attr_tx_compressed.attr, + NULL +}; + + +static struct attribute_group netstat_group = { + .name = "statistics", + .attrs = netstat_attrs, +}; + +#ifdef WIRELESS_EXT +/* helper function that does all the locking etc for wireless stats */ +static ssize_t wireless_show(struct class_device *cd, char *buf, + ssize_t (*format)(const struct iw_statistics *, + char *)) +{ + struct net_device *dev = to_net_dev(cd); + const struct iw_statistics *iw; + ssize_t ret = -EINVAL; + + read_lock(&dev_base_lock); + if (dev_isalive(dev) && dev->get_wireless_stats + && (iw = dev->get_wireless_stats(dev)) != NULL) + ret = (*format)(iw, buf); + read_unlock(&dev_base_lock); + + return ret; +} + +/* show function template for wireless fields */ +#define WIRELESS_SHOW(name, field, format_string) \ +static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ +{ \ + return sprintf(buf, format_string, iw->field); \ +} \ +static ssize_t show_iw_##name(struct class_device *cd, char *buf) \ +{ \ + return wireless_show(cd, buf, format_iw_##name); \ +} \ +static CLASS_DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) + +WIRELESS_SHOW(status, status, fmt_hex); +WIRELESS_SHOW(link, qual.qual, fmt_dec); +WIRELESS_SHOW(level, qual.level, fmt_dec); +WIRELESS_SHOW(noise, qual.noise, fmt_dec); +WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); +WIRELESS_SHOW(crypt, discard.code, fmt_dec); +WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); +WIRELESS_SHOW(misc, discard.misc, fmt_dec); +WIRELESS_SHOW(retries, discard.retries, fmt_dec); +WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); + +static struct attribute *wireless_attrs[] = { + &class_device_attr_status.attr, + &class_device_attr_link.attr, + &class_device_attr_level.attr, + &class_device_attr_noise.attr, + &class_device_attr_nwid.attr, + &class_device_attr_crypt.attr, + &class_device_attr_fragment.attr, + &class_device_attr_retries.attr, + &class_device_attr_misc.attr, + &class_device_attr_beacon.attr, + NULL +}; + +static struct attribute_group wireless_group = { + .name = "wireless", + .attrs = wireless_attrs, +}; +#endif + +#ifdef CONFIG_HOTPLUG +static int netdev_hotplug(struct class_device *cd, char **envp, + int num_envp, char *buf, int size) +{ + struct net_device *dev = to_net_dev(cd); + int i = 0; + int n; + + /* pass interface in env to hotplug. */ + envp[i++] = buf; + n = snprintf(buf, size, "INTERFACE=%s", dev->name) + 1; + buf += n; + size -= n; + + if ((size <= 0) || (i >= num_envp)) + return -ENOMEM; + + envp[i] = NULL; + return 0; +} +#endif + +/* + * netdev_release -- destroy and free a dead device. + * Called when last reference to class_device kobject is gone. + */ +static void netdev_release(struct class_device *cd) +{ + struct net_device *dev + = container_of(cd, struct net_device, class_dev); + + BUG_ON(dev->reg_state != NETREG_RELEASED); + + kfree((char *)dev - dev->padded); +} + +static struct class net_class = { + .name = "net", + .release = netdev_release, +#ifdef CONFIG_HOTPLUG + .hotplug = netdev_hotplug, +#endif +}; + +void netdev_unregister_sysfs(struct net_device * net) +{ + struct class_device * class_dev = &(net->class_dev); + + if (net->get_stats) + sysfs_remove_group(&class_dev->kobj, &netstat_group); + +#ifdef WIRELESS_EXT + if (net->get_wireless_stats) + sysfs_remove_group(&class_dev->kobj, &wireless_group); +#endif + class_device_del(class_dev); + +} + +/* Create sysfs entries for network device. */ +int netdev_register_sysfs(struct net_device *net) +{ + struct class_device *class_dev = &(net->class_dev); + int i; + struct class_device_attribute *attr; + int ret; + + class_dev->class = &net_class; + class_dev->class_data = net; + + strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE); + if ((ret = class_device_register(class_dev))) + goto out; + + for (i = 0; (attr = net_class_attributes[i]) != NULL; i++) { + if ((ret = class_device_create_file(class_dev, attr))) + goto out_unreg; + } + + + if (net->get_stats && + (ret = sysfs_create_group(&class_dev->kobj, &netstat_group))) + goto out_unreg; + +#ifdef WIRELESS_EXT + if (net->get_wireless_stats && + (ret = sysfs_create_group(&class_dev->kobj, &wireless_group))) + goto out_cleanup; + + return 0; +out_cleanup: + if (net->get_stats) + sysfs_remove_group(&class_dev->kobj, &netstat_group); +#else + return 0; +#endif + +out_unreg: + printk(KERN_WARNING "%s: sysfs attribute registration failed %d\n", + net->name, ret); + class_device_unregister(class_dev); +out: + return ret; +} + +int netdev_sysfs_init(void) +{ + return class_register(&net_class); +} |