Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net-sysfs.c - network device class and attributes |
| 3 | * |
| 4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 5 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 12 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/kernel.h> |
| 14 | #include <linux/netdevice.h> |
| 15 | #include <linux/if_arp.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 16 | #include <linux/slab.h> |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 17 | #include <linux/nsproxy.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <net/sock.h> |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 19 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/rtnetlink.h> |
| 21 | #include <linux/wireless.h> |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 22 | #include <linux/vmalloc.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 23 | #include <linux/export.h> |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 24 | #include <linux/jiffies.h> |
Johannes Berg | 8f1546c | 2009-09-28 15:26:43 +0200 | [diff] [blame] | 25 | #include <net/wext.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
Pavel Emelyanov | 342709e | 2007-10-23 21:14:45 -0700 | [diff] [blame] | 27 | #include "net-sysfs.h" |
| 28 | |
Eric W. Biederman | 8b41d18 | 2007-09-26 22:02:53 -0700 | [diff] [blame] | 29 | #ifdef CONFIG_SYSFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | static const char fmt_hex[] = "%#x\n"; |
David S. Miller | d1102b5 | 2005-05-29 20:28:25 -0700 | [diff] [blame] | 31 | static const char fmt_long_hex[] = "%#lx\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | static const char fmt_dec[] = "%d\n"; |
David Decotigny | 8ae6dac | 2011-04-27 18:32:38 +0000 | [diff] [blame] | 33 | static const char fmt_udec[] = "%u\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | static const char fmt_ulong[] = "%lu\n"; |
Ben Hutchings | be1f3c2 | 2010-06-08 07:19:54 +0000 | [diff] [blame] | 35 | static const char fmt_u64[] = "%llu\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 37 | static inline int dev_isalive(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | { |
Stephen Hemminger | fe9925b | 2006-05-06 17:56:03 -0700 | [diff] [blame] | 39 | return dev->reg_state <= NETREG_REGISTERED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | /* use same locking rules as GIF* ioctl's */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 43 | static ssize_t netdev_show(const struct device *dev, |
| 44 | struct device_attribute *attr, char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | ssize_t (*format)(const struct net_device *, char *)) |
| 46 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 47 | struct net_device *net = to_net_dev(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | ssize_t ret = -EINVAL; |
| 49 | |
| 50 | read_lock(&dev_base_lock); |
| 51 | if (dev_isalive(net)) |
| 52 | ret = (*format)(net, buf); |
| 53 | read_unlock(&dev_base_lock); |
| 54 | |
| 55 | return ret; |
| 56 | } |
| 57 | |
| 58 | /* generate a show function for simple field */ |
| 59 | #define NETDEVICE_SHOW(field, format_string) \ |
| 60 | static ssize_t format_##field(const struct net_device *net, char *buf) \ |
| 61 | { \ |
| 62 | return sprintf(buf, format_string, net->field); \ |
| 63 | } \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 64 | static ssize_t show_##field(struct device *dev, \ |
| 65 | struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 67 | return netdev_show(dev, attr, buf, format_##field); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | |
| 71 | /* use same locking and permission rules as SIF* ioctl's */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 72 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | const char *buf, size_t len, |
| 74 | int (*set)(struct net_device *, unsigned long)) |
| 75 | { |
| 76 | struct net_device *net = to_net_dev(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | unsigned long new; |
| 78 | int ret = -EINVAL; |
| 79 | |
| 80 | if (!capable(CAP_NET_ADMIN)) |
| 81 | return -EPERM; |
| 82 | |
Shuah Khan | e1e420c | 2012-04-12 09:28:13 +0000 | [diff] [blame] | 83 | ret = kstrtoul(buf, 0, &new); |
| 84 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | goto err; |
| 86 | |
Stephen Hemminger | 5a5990d | 2009-02-26 06:49:24 +0000 | [diff] [blame] | 87 | if (!rtnl_trylock()) |
Eric W. Biederman | 336ca57 | 2009-05-13 16:57:25 +0000 | [diff] [blame] | 88 | return restart_syscall(); |
Stephen Hemminger | 5a5990d | 2009-02-26 06:49:24 +0000 | [diff] [blame] | 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | if (dev_isalive(net)) { |
| 91 | if ((ret = (*set)(net, new)) == 0) |
| 92 | ret = len; |
| 93 | } |
| 94 | rtnl_unlock(); |
| 95 | err: |
| 96 | return ret; |
| 97 | } |
| 98 | |
David Woodhouse | 9d29672 | 2008-04-20 16:07:43 -0700 | [diff] [blame] | 99 | NETDEVICE_SHOW(dev_id, fmt_hex); |
Stefan Assmann | c1f7942 | 2010-07-22 02:50:21 +0000 | [diff] [blame] | 100 | NETDEVICE_SHOW(addr_assign_type, fmt_dec); |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 101 | NETDEVICE_SHOW(addr_len, fmt_dec); |
| 102 | NETDEVICE_SHOW(iflink, fmt_dec); |
| 103 | NETDEVICE_SHOW(ifindex, fmt_dec); |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 104 | NETDEVICE_SHOW(type, fmt_dec); |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 105 | NETDEVICE_SHOW(link_mode, fmt_dec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
| 107 | /* use same locking rules as GIFHWADDR ioctl's */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 108 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
| 109 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { |
| 111 | struct net_device *net = to_net_dev(dev); |
| 112 | ssize_t ret = -EINVAL; |
| 113 | |
| 114 | read_lock(&dev_base_lock); |
| 115 | if (dev_isalive(net)) |
Michael Chan | 7ffc49a | 2007-12-24 21:28:09 -0800 | [diff] [blame] | 116 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | read_unlock(&dev_base_lock); |
| 118 | return ret; |
| 119 | } |
| 120 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 121 | static ssize_t show_broadcast(struct device *dev, |
| 122 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | { |
| 124 | struct net_device *net = to_net_dev(dev); |
| 125 | if (dev_isalive(net)) |
Michael Chan | 7ffc49a | 2007-12-24 21:28:09 -0800 | [diff] [blame] | 126 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | return -EINVAL; |
| 128 | } |
| 129 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 130 | static ssize_t show_carrier(struct device *dev, |
| 131 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
| 133 | struct net_device *netdev = to_net_dev(dev); |
| 134 | if (netif_running(netdev)) { |
| 135 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); |
| 136 | } |
| 137 | return -EINVAL; |
| 138 | } |
| 139 | |
Andy Gospodarek | d519e17 | 2009-10-02 09:26:12 +0000 | [diff] [blame] | 140 | static ssize_t show_speed(struct device *dev, |
| 141 | struct device_attribute *attr, char *buf) |
| 142 | { |
| 143 | struct net_device *netdev = to_net_dev(dev); |
| 144 | int ret = -EINVAL; |
| 145 | |
| 146 | if (!rtnl_trylock()) |
| 147 | return restart_syscall(); |
| 148 | |
David Decotigny | 8ae6dac | 2011-04-27 18:32:38 +0000 | [diff] [blame] | 149 | if (netif_running(netdev)) { |
| 150 | struct ethtool_cmd cmd; |
Jiri Pirko | 4bc71cb | 2011-09-03 03:34:30 +0000 | [diff] [blame] | 151 | if (!__ethtool_get_settings(netdev, &cmd)) |
David Decotigny | 8ae6dac | 2011-04-27 18:32:38 +0000 | [diff] [blame] | 152 | ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); |
Andy Gospodarek | d519e17 | 2009-10-02 09:26:12 +0000 | [diff] [blame] | 153 | } |
| 154 | rtnl_unlock(); |
| 155 | return ret; |
| 156 | } |
| 157 | |
| 158 | static ssize_t show_duplex(struct device *dev, |
| 159 | struct device_attribute *attr, char *buf) |
| 160 | { |
| 161 | struct net_device *netdev = to_net_dev(dev); |
| 162 | int ret = -EINVAL; |
| 163 | |
| 164 | if (!rtnl_trylock()) |
| 165 | return restart_syscall(); |
| 166 | |
David Decotigny | 8ae6dac | 2011-04-27 18:32:38 +0000 | [diff] [blame] | 167 | if (netif_running(netdev)) { |
| 168 | struct ethtool_cmd cmd; |
Jiri Pirko | 4bc71cb | 2011-09-03 03:34:30 +0000 | [diff] [blame] | 169 | if (!__ethtool_get_settings(netdev, &cmd)) |
David Decotigny | 8ae6dac | 2011-04-27 18:32:38 +0000 | [diff] [blame] | 170 | ret = sprintf(buf, "%s\n", |
| 171 | cmd.duplex ? "full" : "half"); |
Andy Gospodarek | d519e17 | 2009-10-02 09:26:12 +0000 | [diff] [blame] | 172 | } |
| 173 | rtnl_unlock(); |
| 174 | return ret; |
| 175 | } |
| 176 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 177 | static ssize_t show_dormant(struct device *dev, |
| 178 | struct device_attribute *attr, char *buf) |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 179 | { |
| 180 | struct net_device *netdev = to_net_dev(dev); |
| 181 | |
| 182 | if (netif_running(netdev)) |
| 183 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); |
| 184 | |
| 185 | return -EINVAL; |
| 186 | } |
| 187 | |
Jan Engelhardt | 36cbd3d | 2009-08-05 10:42:58 -0700 | [diff] [blame] | 188 | static const char *const operstates[] = { |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 189 | "unknown", |
| 190 | "notpresent", /* currently unused */ |
| 191 | "down", |
| 192 | "lowerlayerdown", |
| 193 | "testing", /* currently unused */ |
| 194 | "dormant", |
| 195 | "up" |
| 196 | }; |
| 197 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 198 | static ssize_t show_operstate(struct device *dev, |
| 199 | struct device_attribute *attr, char *buf) |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 200 | { |
| 201 | const struct net_device *netdev = to_net_dev(dev); |
| 202 | unsigned char operstate; |
| 203 | |
| 204 | read_lock(&dev_base_lock); |
| 205 | operstate = netdev->operstate; |
| 206 | if (!netif_running(netdev)) |
| 207 | operstate = IF_OPER_DOWN; |
| 208 | read_unlock(&dev_base_lock); |
| 209 | |
Adrian Bunk | e3a5cd9 | 2006-04-05 22:19:47 -0700 | [diff] [blame] | 210 | if (operstate >= ARRAY_SIZE(operstates)) |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 211 | return -EINVAL; /* should not happen */ |
| 212 | |
| 213 | return sprintf(buf, "%s\n", operstates[operstate]); |
| 214 | } |
| 215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | /* read-write attributes */ |
| 217 | NETDEVICE_SHOW(mtu, fmt_dec); |
| 218 | |
| 219 | static int change_mtu(struct net_device *net, unsigned long new_mtu) |
| 220 | { |
| 221 | return dev_set_mtu(net, (int) new_mtu); |
| 222 | } |
| 223 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 224 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
| 225 | const char *buf, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 227 | return netdev_store(dev, attr, buf, len, change_mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
| 229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | NETDEVICE_SHOW(flags, fmt_hex); |
| 231 | |
| 232 | static int change_flags(struct net_device *net, unsigned long new_flags) |
| 233 | { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame^] | 234 | return dev_change_flags(net, (unsigned int) new_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | } |
| 236 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 237 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
| 238 | const char *buf, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 240 | return netdev_store(dev, attr, buf, len, change_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); |
| 244 | |
| 245 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) |
| 246 | { |
| 247 | net->tx_queue_len = new_len; |
| 248 | return 0; |
| 249 | } |
| 250 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 251 | static ssize_t store_tx_queue_len(struct device *dev, |
| 252 | struct device_attribute *attr, |
| 253 | const char *buf, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 255 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | |
Stephen Hemminger | 0b815a1 | 2008-09-22 21:28:11 -0700 | [diff] [blame] | 258 | static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, |
| 259 | const char *buf, size_t len) |
| 260 | { |
| 261 | struct net_device *netdev = to_net_dev(dev); |
| 262 | size_t count = len; |
| 263 | ssize_t ret; |
| 264 | |
| 265 | if (!capable(CAP_NET_ADMIN)) |
| 266 | return -EPERM; |
| 267 | |
| 268 | /* ignore trailing newline */ |
| 269 | if (len > 0 && buf[len - 1] == '\n') |
| 270 | --count; |
| 271 | |
Eric W. Biederman | 336ca57 | 2009-05-13 16:57:25 +0000 | [diff] [blame] | 272 | if (!rtnl_trylock()) |
| 273 | return restart_syscall(); |
Stephen Hemminger | 0b815a1 | 2008-09-22 21:28:11 -0700 | [diff] [blame] | 274 | ret = dev_set_alias(netdev, buf, count); |
| 275 | rtnl_unlock(); |
| 276 | |
| 277 | return ret < 0 ? ret : len; |
| 278 | } |
| 279 | |
| 280 | static ssize_t show_ifalias(struct device *dev, |
| 281 | struct device_attribute *attr, char *buf) |
| 282 | { |
| 283 | const struct net_device *netdev = to_net_dev(dev); |
| 284 | ssize_t ret = 0; |
| 285 | |
Eric W. Biederman | 336ca57 | 2009-05-13 16:57:25 +0000 | [diff] [blame] | 286 | if (!rtnl_trylock()) |
| 287 | return restart_syscall(); |
Stephen Hemminger | 0b815a1 | 2008-09-22 21:28:11 -0700 | [diff] [blame] | 288 | if (netdev->ifalias) |
| 289 | ret = sprintf(buf, "%s\n", netdev->ifalias); |
| 290 | rtnl_unlock(); |
| 291 | return ret; |
| 292 | } |
| 293 | |
Vlad Dogaru | a512b92 | 2011-01-24 03:37:29 +0000 | [diff] [blame] | 294 | NETDEVICE_SHOW(group, fmt_dec); |
| 295 | |
| 296 | static int change_group(struct net_device *net, unsigned long new_group) |
| 297 | { |
| 298 | dev_set_group(net, (int) new_group); |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | static ssize_t store_group(struct device *dev, struct device_attribute *attr, |
| 303 | const char *buf, size_t len) |
| 304 | { |
| 305 | return netdev_store(dev, attr, buf, len, change_group); |
| 306 | } |
| 307 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 308 | static struct device_attribute net_class_attributes[] = { |
Stefan Assmann | c1f7942 | 2010-07-22 02:50:21 +0000 | [diff] [blame] | 309 | __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 310 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
David Woodhouse | 9d29672 | 2008-04-20 16:07:43 -0700 | [diff] [blame] | 311 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
Stephen Hemminger | 0b815a1 | 2008-09-22 21:28:11 -0700 | [diff] [blame] | 312 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 313 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
| 314 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 315 | __ATTR(type, S_IRUGO, show_type, NULL), |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 316 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 317 | __ATTR(address, S_IRUGO, show_address, NULL), |
| 318 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), |
| 319 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), |
Andy Gospodarek | d519e17 | 2009-10-02 09:26:12 +0000 | [diff] [blame] | 320 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
| 321 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 322 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
| 323 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 324 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
| 325 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), |
| 326 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, |
| 327 | store_tx_queue_len), |
Xiaotian Feng | b6644cb | 2011-02-09 19:16:15 -0800 | [diff] [blame] | 328 | __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 329 | {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | }; |
| 331 | |
| 332 | /* Show a given an attribute in the statistics group */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 333 | static ssize_t netstat_show(const struct device *d, |
| 334 | struct device_attribute *attr, char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | unsigned long offset) |
| 336 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 337 | struct net_device *dev = to_net_dev(d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | ssize_t ret = -EINVAL; |
| 339 | |
Ben Hutchings | be1f3c2 | 2010-06-08 07:19:54 +0000 | [diff] [blame] | 340 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
| 341 | offset % sizeof(u64) != 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
| 343 | read_lock(&dev_base_lock); |
Pavel Emelyanov | 96e7408 | 2008-05-21 14:12:46 -0700 | [diff] [blame] | 344 | if (dev_isalive(dev)) { |
Eric Dumazet | 2817273 | 2010-07-07 14:58:56 -0700 | [diff] [blame] | 345 | struct rtnl_link_stats64 temp; |
| 346 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); |
| 347 | |
Ben Hutchings | be1f3c2 | 2010-06-08 07:19:54 +0000 | [diff] [blame] | 348 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
Pavel Emelyanov | 96e7408 | 2008-05-21 14:12:46 -0700 | [diff] [blame] | 349 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | read_unlock(&dev_base_lock); |
| 351 | return ret; |
| 352 | } |
| 353 | |
| 354 | /* generate a read-only statistics attribute */ |
| 355 | #define NETSTAT_ENTRY(name) \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 356 | static ssize_t show_##name(struct device *d, \ |
| 357 | struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | { \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 359 | return netstat_show(d, attr, buf, \ |
Ben Hutchings | be1f3c2 | 2010-06-08 07:19:54 +0000 | [diff] [blame] | 360 | offsetof(struct rtnl_link_stats64, name)); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 362 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
| 364 | NETSTAT_ENTRY(rx_packets); |
| 365 | NETSTAT_ENTRY(tx_packets); |
| 366 | NETSTAT_ENTRY(rx_bytes); |
| 367 | NETSTAT_ENTRY(tx_bytes); |
| 368 | NETSTAT_ENTRY(rx_errors); |
| 369 | NETSTAT_ENTRY(tx_errors); |
| 370 | NETSTAT_ENTRY(rx_dropped); |
| 371 | NETSTAT_ENTRY(tx_dropped); |
| 372 | NETSTAT_ENTRY(multicast); |
| 373 | NETSTAT_ENTRY(collisions); |
| 374 | NETSTAT_ENTRY(rx_length_errors); |
| 375 | NETSTAT_ENTRY(rx_over_errors); |
| 376 | NETSTAT_ENTRY(rx_crc_errors); |
| 377 | NETSTAT_ENTRY(rx_frame_errors); |
| 378 | NETSTAT_ENTRY(rx_fifo_errors); |
| 379 | NETSTAT_ENTRY(rx_missed_errors); |
| 380 | NETSTAT_ENTRY(tx_aborted_errors); |
| 381 | NETSTAT_ENTRY(tx_carrier_errors); |
| 382 | NETSTAT_ENTRY(tx_fifo_errors); |
| 383 | NETSTAT_ENTRY(tx_heartbeat_errors); |
| 384 | NETSTAT_ENTRY(tx_window_errors); |
| 385 | NETSTAT_ENTRY(rx_compressed); |
| 386 | NETSTAT_ENTRY(tx_compressed); |
| 387 | |
| 388 | static struct attribute *netstat_attrs[] = { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 389 | &dev_attr_rx_packets.attr, |
| 390 | &dev_attr_tx_packets.attr, |
| 391 | &dev_attr_rx_bytes.attr, |
| 392 | &dev_attr_tx_bytes.attr, |
| 393 | &dev_attr_rx_errors.attr, |
| 394 | &dev_attr_tx_errors.attr, |
| 395 | &dev_attr_rx_dropped.attr, |
| 396 | &dev_attr_tx_dropped.attr, |
| 397 | &dev_attr_multicast.attr, |
| 398 | &dev_attr_collisions.attr, |
| 399 | &dev_attr_rx_length_errors.attr, |
| 400 | &dev_attr_rx_over_errors.attr, |
| 401 | &dev_attr_rx_crc_errors.attr, |
| 402 | &dev_attr_rx_frame_errors.attr, |
| 403 | &dev_attr_rx_fifo_errors.attr, |
| 404 | &dev_attr_rx_missed_errors.attr, |
| 405 | &dev_attr_tx_aborted_errors.attr, |
| 406 | &dev_attr_tx_carrier_errors.attr, |
| 407 | &dev_attr_tx_fifo_errors.attr, |
| 408 | &dev_attr_tx_heartbeat_errors.attr, |
| 409 | &dev_attr_tx_window_errors.attr, |
| 410 | &dev_attr_rx_compressed.attr, |
| 411 | &dev_attr_tx_compressed.attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | NULL |
| 413 | }; |
| 414 | |
| 415 | |
| 416 | static struct attribute_group netstat_group = { |
| 417 | .name = "statistics", |
| 418 | .attrs = netstat_attrs, |
| 419 | }; |
| 420 | |
Johannes Berg | 22bb1be | 2008-07-10 11:16:47 +0200 | [diff] [blame] | 421 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | /* helper function that does all the locking etc for wireless stats */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 423 | static ssize_t wireless_show(struct device *d, char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | ssize_t (*format)(const struct iw_statistics *, |
| 425 | char *)) |
| 426 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 427 | struct net_device *dev = to_net_dev(d); |
Johannes Berg | 8f1546c | 2009-09-28 15:26:43 +0200 | [diff] [blame] | 428 | const struct iw_statistics *iw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | ssize_t ret = -EINVAL; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 430 | |
Eric W. Biederman | b8afe64 | 2010-02-19 13:23:47 +0000 | [diff] [blame] | 431 | if (!rtnl_trylock()) |
| 432 | return restart_syscall(); |
Andrey Borzenkov | 6dd214b | 2006-01-09 20:51:28 -0800 | [diff] [blame] | 433 | if (dev_isalive(dev)) { |
Johannes Berg | 8f1546c | 2009-09-28 15:26:43 +0200 | [diff] [blame] | 434 | iw = get_wireless_stats(dev); |
| 435 | if (iw) |
Andrey Borzenkov | 6dd214b | 2006-01-09 20:51:28 -0800 | [diff] [blame] | 436 | ret = (*format)(iw, buf); |
| 437 | } |
Johannes Berg | a160ee6 | 2009-10-05 02:22:23 -0700 | [diff] [blame] | 438 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
| 440 | return ret; |
| 441 | } |
| 442 | |
| 443 | /* show function template for wireless fields */ |
| 444 | #define WIRELESS_SHOW(name, field, format_string) \ |
| 445 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ |
| 446 | { \ |
| 447 | return sprintf(buf, format_string, iw->field); \ |
| 448 | } \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 449 | static ssize_t show_iw_##name(struct device *d, \ |
| 450 | struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 452 | return wireless_show(d, buf, format_iw_##name); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | } \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 454 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
| 456 | WIRELESS_SHOW(status, status, fmt_hex); |
| 457 | WIRELESS_SHOW(link, qual.qual, fmt_dec); |
| 458 | WIRELESS_SHOW(level, qual.level, fmt_dec); |
| 459 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); |
| 460 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); |
| 461 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); |
| 462 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); |
| 463 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); |
| 464 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); |
| 465 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); |
| 466 | |
| 467 | static struct attribute *wireless_attrs[] = { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 468 | &dev_attr_status.attr, |
| 469 | &dev_attr_link.attr, |
| 470 | &dev_attr_level.attr, |
| 471 | &dev_attr_noise.attr, |
| 472 | &dev_attr_nwid.attr, |
| 473 | &dev_attr_crypt.attr, |
| 474 | &dev_attr_fragment.attr, |
| 475 | &dev_attr_retries.attr, |
| 476 | &dev_attr_misc.attr, |
| 477 | &dev_attr_beacon.attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | NULL |
| 479 | }; |
| 480 | |
| 481 | static struct attribute_group wireless_group = { |
| 482 | .name = "wireless", |
| 483 | .attrs = wireless_attrs, |
| 484 | }; |
| 485 | #endif |
Eric W. Biederman | d6523dd | 2010-05-16 21:59:45 -0700 | [diff] [blame] | 486 | #endif /* CONFIG_SYSFS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
Stephen Rothwell | 30bde1f | 2010-03-29 01:00:44 -0700 | [diff] [blame] | 488 | #ifdef CONFIG_RPS |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 489 | /* |
| 490 | * RX queue sysfs structures and functions. |
| 491 | */ |
| 492 | struct rx_queue_attribute { |
| 493 | struct attribute attr; |
| 494 | ssize_t (*show)(struct netdev_rx_queue *queue, |
| 495 | struct rx_queue_attribute *attr, char *buf); |
| 496 | ssize_t (*store)(struct netdev_rx_queue *queue, |
| 497 | struct rx_queue_attribute *attr, const char *buf, size_t len); |
| 498 | }; |
| 499 | #define to_rx_queue_attr(_attr) container_of(_attr, \ |
| 500 | struct rx_queue_attribute, attr) |
| 501 | |
| 502 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) |
| 503 | |
| 504 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, |
| 505 | char *buf) |
| 506 | { |
| 507 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
| 508 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
| 509 | |
| 510 | if (!attribute->show) |
| 511 | return -EIO; |
| 512 | |
| 513 | return attribute->show(queue, attribute, buf); |
| 514 | } |
| 515 | |
| 516 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, |
| 517 | const char *buf, size_t count) |
| 518 | { |
| 519 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
| 520 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
| 521 | |
| 522 | if (!attribute->store) |
| 523 | return -EIO; |
| 524 | |
| 525 | return attribute->store(queue, attribute, buf, count); |
| 526 | } |
| 527 | |
stephen hemminger | fa50d64 | 2010-08-31 12:14:13 +0000 | [diff] [blame] | 528 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 529 | .show = rx_queue_attr_show, |
| 530 | .store = rx_queue_attr_store, |
| 531 | }; |
| 532 | |
| 533 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, |
| 534 | struct rx_queue_attribute *attribute, char *buf) |
| 535 | { |
| 536 | struct rps_map *map; |
| 537 | cpumask_var_t mask; |
| 538 | size_t len = 0; |
| 539 | int i; |
| 540 | |
| 541 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) |
| 542 | return -ENOMEM; |
| 543 | |
| 544 | rcu_read_lock(); |
| 545 | map = rcu_dereference(queue->rps_map); |
| 546 | if (map) |
| 547 | for (i = 0; i < map->len; i++) |
| 548 | cpumask_set_cpu(map->cpus[i], mask); |
| 549 | |
| 550 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); |
| 551 | if (PAGE_SIZE - len < 3) { |
| 552 | rcu_read_unlock(); |
| 553 | free_cpumask_var(mask); |
| 554 | return -EINVAL; |
| 555 | } |
| 556 | rcu_read_unlock(); |
| 557 | |
| 558 | free_cpumask_var(mask); |
| 559 | len += sprintf(buf + len, "\n"); |
| 560 | return len; |
| 561 | } |
| 562 | |
Eric Dumazet | f5acb90 | 2010-04-19 14:40:57 -0700 | [diff] [blame] | 563 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 564 | struct rx_queue_attribute *attribute, |
| 565 | const char *buf, size_t len) |
| 566 | { |
| 567 | struct rps_map *old_map, *map; |
| 568 | cpumask_var_t mask; |
| 569 | int err, cpu, i; |
| 570 | static DEFINE_SPINLOCK(rps_map_lock); |
| 571 | |
| 572 | if (!capable(CAP_NET_ADMIN)) |
| 573 | return -EPERM; |
| 574 | |
| 575 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
| 576 | return -ENOMEM; |
| 577 | |
| 578 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); |
| 579 | if (err) { |
| 580 | free_cpumask_var(mask); |
| 581 | return err; |
| 582 | } |
| 583 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame^] | 584 | map = kzalloc(max_t(unsigned int, |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 585 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
| 586 | GFP_KERNEL); |
| 587 | if (!map) { |
| 588 | free_cpumask_var(mask); |
| 589 | return -ENOMEM; |
| 590 | } |
| 591 | |
| 592 | i = 0; |
| 593 | for_each_cpu_and(cpu, mask, cpu_online_mask) |
| 594 | map->cpus[i++] = cpu; |
| 595 | |
| 596 | if (i) |
| 597 | map->len = i; |
| 598 | else { |
| 599 | kfree(map); |
| 600 | map = NULL; |
| 601 | } |
| 602 | |
| 603 | spin_lock(&rps_map_lock); |
Eric Dumazet | 6e3f7fa | 2010-10-25 03:02:02 +0000 | [diff] [blame] | 604 | old_map = rcu_dereference_protected(queue->rps_map, |
| 605 | lockdep_is_held(&rps_map_lock)); |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 606 | rcu_assign_pointer(queue->rps_map, map); |
| 607 | spin_unlock(&rps_map_lock); |
| 608 | |
Eric Dumazet | adc9300 | 2011-11-17 03:13:26 +0000 | [diff] [blame] | 609 | if (map) |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 610 | static_key_slow_inc(&rps_needed); |
Eric Dumazet | adc9300 | 2011-11-17 03:13:26 +0000 | [diff] [blame] | 611 | if (old_map) { |
Lai Jiangshan | f6f8023 | 2011-03-18 12:01:31 +0800 | [diff] [blame] | 612 | kfree_rcu(old_map, rcu); |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 613 | static_key_slow_dec(&rps_needed); |
Eric Dumazet | adc9300 | 2011-11-17 03:13:26 +0000 | [diff] [blame] | 614 | } |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 615 | free_cpumask_var(mask); |
| 616 | return len; |
| 617 | } |
| 618 | |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 619 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
| 620 | struct rx_queue_attribute *attr, |
| 621 | char *buf) |
| 622 | { |
| 623 | struct rps_dev_flow_table *flow_table; |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 624 | unsigned long val = 0; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 625 | |
| 626 | rcu_read_lock(); |
| 627 | flow_table = rcu_dereference(queue->rps_flow_table); |
| 628 | if (flow_table) |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 629 | val = (unsigned long)flow_table->mask + 1; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 630 | rcu_read_unlock(); |
| 631 | |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 632 | return sprintf(buf, "%lu\n", val); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 633 | } |
| 634 | |
| 635 | static void rps_dev_flow_table_release_work(struct work_struct *work) |
| 636 | { |
| 637 | struct rps_dev_flow_table *table = container_of(work, |
| 638 | struct rps_dev_flow_table, free_work); |
| 639 | |
| 640 | vfree(table); |
| 641 | } |
| 642 | |
| 643 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
| 644 | { |
| 645 | struct rps_dev_flow_table *table = container_of(rcu, |
| 646 | struct rps_dev_flow_table, rcu); |
| 647 | |
| 648 | INIT_WORK(&table->free_work, rps_dev_flow_table_release_work); |
| 649 | schedule_work(&table->free_work); |
| 650 | } |
| 651 | |
Eric Dumazet | f5acb90 | 2010-04-19 14:40:57 -0700 | [diff] [blame] | 652 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 653 | struct rx_queue_attribute *attr, |
| 654 | const char *buf, size_t len) |
| 655 | { |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 656 | unsigned long mask, count; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 657 | struct rps_dev_flow_table *table, *old_table; |
| 658 | static DEFINE_SPINLOCK(rps_dev_flow_lock); |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 659 | int rc; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 660 | |
| 661 | if (!capable(CAP_NET_ADMIN)) |
| 662 | return -EPERM; |
| 663 | |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 664 | rc = kstrtoul(buf, 0, &count); |
| 665 | if (rc < 0) |
| 666 | return rc; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 667 | |
| 668 | if (count) { |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 669 | mask = count - 1; |
| 670 | /* mask = roundup_pow_of_two(count) - 1; |
| 671 | * without overflows... |
| 672 | */ |
| 673 | while ((mask | (mask >> 1)) != mask) |
| 674 | mask |= (mask >> 1); |
| 675 | /* On 64 bit arches, must check mask fits in table->mask (u32), |
| 676 | * and on 32bit arches, must check RPS_DEV_FLOW_TABLE_SIZE(mask + 1) |
| 677 | * doesnt overflow. |
| 678 | */ |
| 679 | #if BITS_PER_LONG > 32 |
| 680 | if (mask > (unsigned long)(u32)mask) |
Xi Wang | a0a129f | 2011-12-22 13:35:22 +0000 | [diff] [blame] | 681 | return -EINVAL; |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 682 | #else |
| 683 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) |
Xi Wang | a0a129f | 2011-12-22 13:35:22 +0000 | [diff] [blame] | 684 | / sizeof(struct rps_dev_flow)) { |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 685 | /* Enforce a limit to prevent overflow */ |
| 686 | return -EINVAL; |
| 687 | } |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 688 | #endif |
| 689 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 690 | if (!table) |
| 691 | return -ENOMEM; |
| 692 | |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 693 | table->mask = mask; |
| 694 | for (count = 0; count <= mask; count++) |
| 695 | table->flows[count].cpu = RPS_NO_CPU; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 696 | } else |
| 697 | table = NULL; |
| 698 | |
| 699 | spin_lock(&rps_dev_flow_lock); |
Eric Dumazet | 6e3f7fa | 2010-10-25 03:02:02 +0000 | [diff] [blame] | 700 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
| 701 | lockdep_is_held(&rps_dev_flow_lock)); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 702 | rcu_assign_pointer(queue->rps_flow_table, table); |
| 703 | spin_unlock(&rps_dev_flow_lock); |
| 704 | |
| 705 | if (old_table) |
| 706 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); |
| 707 | |
| 708 | return len; |
| 709 | } |
| 710 | |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 711 | static struct rx_queue_attribute rps_cpus_attribute = |
| 712 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); |
| 713 | |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 714 | |
| 715 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = |
| 716 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, |
| 717 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); |
| 718 | |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 719 | static struct attribute *rx_queue_default_attrs[] = { |
| 720 | &rps_cpus_attribute.attr, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 721 | &rps_dev_flow_table_cnt_attribute.attr, |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 722 | NULL |
| 723 | }; |
| 724 | |
| 725 | static void rx_queue_release(struct kobject *kobj) |
| 726 | { |
| 727 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
Eric Dumazet | 6e3f7fa | 2010-10-25 03:02:02 +0000 | [diff] [blame] | 728 | struct rps_map *map; |
| 729 | struct rps_dev_flow_table *flow_table; |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 730 | |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 731 | |
Eric Dumazet | 33d480c | 2011-08-11 19:30:52 +0000 | [diff] [blame] | 732 | map = rcu_dereference_protected(queue->rps_map, 1); |
John Fastabend | 9ea1948 | 2010-11-16 06:31:39 +0000 | [diff] [blame] | 733 | if (map) { |
| 734 | RCU_INIT_POINTER(queue->rps_map, NULL); |
Lai Jiangshan | f6f8023 | 2011-03-18 12:01:31 +0800 | [diff] [blame] | 735 | kfree_rcu(map, rcu); |
John Fastabend | 9ea1948 | 2010-11-16 06:31:39 +0000 | [diff] [blame] | 736 | } |
Eric Dumazet | 6e3f7fa | 2010-10-25 03:02:02 +0000 | [diff] [blame] | 737 | |
Eric Dumazet | 33d480c | 2011-08-11 19:30:52 +0000 | [diff] [blame] | 738 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
John Fastabend | 9ea1948 | 2010-11-16 06:31:39 +0000 | [diff] [blame] | 739 | if (flow_table) { |
| 740 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); |
Eric Dumazet | 6e3f7fa | 2010-10-25 03:02:02 +0000 | [diff] [blame] | 741 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
John Fastabend | 9ea1948 | 2010-11-16 06:31:39 +0000 | [diff] [blame] | 742 | } |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 743 | |
John Fastabend | 9ea1948 | 2010-11-16 06:31:39 +0000 | [diff] [blame] | 744 | memset(kobj, 0, sizeof(*kobj)); |
Tom Herbert | fe82224 | 2010-11-09 10:47:38 +0000 | [diff] [blame] | 745 | dev_put(queue->dev); |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | static struct kobj_type rx_queue_ktype = { |
| 749 | .sysfs_ops = &rx_queue_sysfs_ops, |
| 750 | .release = rx_queue_release, |
| 751 | .default_attrs = rx_queue_default_attrs, |
| 752 | }; |
| 753 | |
| 754 | static int rx_queue_add_kobject(struct net_device *net, int index) |
| 755 | { |
| 756 | struct netdev_rx_queue *queue = net->_rx + index; |
| 757 | struct kobject *kobj = &queue->kobj; |
| 758 | int error = 0; |
| 759 | |
| 760 | kobj->kset = net->queues_kset; |
| 761 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, |
| 762 | "rx-%u", index); |
| 763 | if (error) { |
| 764 | kobject_put(kobj); |
| 765 | return error; |
| 766 | } |
| 767 | |
| 768 | kobject_uevent(kobj, KOBJ_ADD); |
Tom Herbert | fe82224 | 2010-11-09 10:47:38 +0000 | [diff] [blame] | 769 | dev_hold(queue->dev); |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 770 | |
| 771 | return error; |
| 772 | } |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 773 | #endif /* CONFIG_RPS */ |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 774 | |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 775 | int |
| 776 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 777 | { |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 778 | #ifdef CONFIG_RPS |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 779 | int i; |
| 780 | int error = 0; |
| 781 | |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 782 | for (i = old_num; i < new_num; i++) { |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 783 | error = rx_queue_add_kobject(net, i); |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 784 | if (error) { |
| 785 | new_num = old_num; |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 786 | break; |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 787 | } |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 788 | } |
| 789 | |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 790 | while (--i >= new_num) |
| 791 | kobject_put(&net->_rx[i].kobj); |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 792 | |
| 793 | return error; |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 794 | #else |
| 795 | return 0; |
| 796 | #endif |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 797 | } |
| 798 | |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 799 | #ifdef CONFIG_SYSFS |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 800 | /* |
| 801 | * netdev_queue sysfs structures and functions. |
| 802 | */ |
| 803 | struct netdev_queue_attribute { |
| 804 | struct attribute attr; |
| 805 | ssize_t (*show)(struct netdev_queue *queue, |
| 806 | struct netdev_queue_attribute *attr, char *buf); |
| 807 | ssize_t (*store)(struct netdev_queue *queue, |
| 808 | struct netdev_queue_attribute *attr, const char *buf, size_t len); |
| 809 | }; |
| 810 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ |
| 811 | struct netdev_queue_attribute, attr) |
| 812 | |
| 813 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) |
| 814 | |
| 815 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, |
| 816 | struct attribute *attr, char *buf) |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 817 | { |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 818 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); |
| 819 | struct netdev_queue *queue = to_netdev_queue(kobj); |
| 820 | |
| 821 | if (!attribute->show) |
| 822 | return -EIO; |
| 823 | |
| 824 | return attribute->show(queue, attribute, buf); |
| 825 | } |
| 826 | |
| 827 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, |
| 828 | struct attribute *attr, |
| 829 | const char *buf, size_t count) |
| 830 | { |
| 831 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); |
| 832 | struct netdev_queue *queue = to_netdev_queue(kobj); |
| 833 | |
| 834 | if (!attribute->store) |
| 835 | return -EIO; |
| 836 | |
| 837 | return attribute->store(queue, attribute, buf, count); |
| 838 | } |
| 839 | |
| 840 | static const struct sysfs_ops netdev_queue_sysfs_ops = { |
| 841 | .show = netdev_queue_attr_show, |
| 842 | .store = netdev_queue_attr_store, |
| 843 | }; |
| 844 | |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 845 | static ssize_t show_trans_timeout(struct netdev_queue *queue, |
| 846 | struct netdev_queue_attribute *attribute, |
| 847 | char *buf) |
| 848 | { |
| 849 | unsigned long trans_timeout; |
| 850 | |
| 851 | spin_lock_irq(&queue->_xmit_lock); |
| 852 | trans_timeout = queue->trans_timeout; |
| 853 | spin_unlock_irq(&queue->_xmit_lock); |
| 854 | |
| 855 | return sprintf(buf, "%lu", trans_timeout); |
| 856 | } |
| 857 | |
| 858 | static struct netdev_queue_attribute queue_trans_timeout = |
| 859 | __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); |
| 860 | |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 861 | #ifdef CONFIG_BQL |
| 862 | /* |
| 863 | * Byte queue limits sysfs structures and functions. |
| 864 | */ |
| 865 | static ssize_t bql_show(char *buf, unsigned int value) |
| 866 | { |
| 867 | return sprintf(buf, "%u\n", value); |
| 868 | } |
| 869 | |
| 870 | static ssize_t bql_set(const char *buf, const size_t count, |
| 871 | unsigned int *pvalue) |
| 872 | { |
| 873 | unsigned int value; |
| 874 | int err; |
| 875 | |
| 876 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) |
| 877 | value = DQL_MAX_LIMIT; |
| 878 | else { |
| 879 | err = kstrtouint(buf, 10, &value); |
| 880 | if (err < 0) |
| 881 | return err; |
| 882 | if (value > DQL_MAX_LIMIT) |
| 883 | return -EINVAL; |
| 884 | } |
| 885 | |
| 886 | *pvalue = value; |
| 887 | |
| 888 | return count; |
| 889 | } |
| 890 | |
| 891 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, |
| 892 | struct netdev_queue_attribute *attr, |
| 893 | char *buf) |
| 894 | { |
| 895 | struct dql *dql = &queue->dql; |
| 896 | |
| 897 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); |
| 898 | } |
| 899 | |
| 900 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, |
| 901 | struct netdev_queue_attribute *attribute, |
| 902 | const char *buf, size_t len) |
| 903 | { |
| 904 | struct dql *dql = &queue->dql; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame^] | 905 | unsigned int value; |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 906 | int err; |
| 907 | |
| 908 | err = kstrtouint(buf, 10, &value); |
| 909 | if (err < 0) |
| 910 | return err; |
| 911 | |
| 912 | dql->slack_hold_time = msecs_to_jiffies(value); |
| 913 | |
| 914 | return len; |
| 915 | } |
| 916 | |
| 917 | static struct netdev_queue_attribute bql_hold_time_attribute = |
| 918 | __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, |
| 919 | bql_set_hold_time); |
| 920 | |
| 921 | static ssize_t bql_show_inflight(struct netdev_queue *queue, |
| 922 | struct netdev_queue_attribute *attr, |
| 923 | char *buf) |
| 924 | { |
| 925 | struct dql *dql = &queue->dql; |
| 926 | |
| 927 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); |
| 928 | } |
| 929 | |
| 930 | static struct netdev_queue_attribute bql_inflight_attribute = |
Hiroaki SHIMODA | 795d9a2 | 2012-01-14 07:10:21 +0000 | [diff] [blame] | 931 | __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 932 | |
| 933 | #define BQL_ATTR(NAME, FIELD) \ |
| 934 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ |
| 935 | struct netdev_queue_attribute *attr, \ |
| 936 | char *buf) \ |
| 937 | { \ |
| 938 | return bql_show(buf, queue->dql.FIELD); \ |
| 939 | } \ |
| 940 | \ |
| 941 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ |
| 942 | struct netdev_queue_attribute *attr, \ |
| 943 | const char *buf, size_t len) \ |
| 944 | { \ |
| 945 | return bql_set(buf, len, &queue->dql.FIELD); \ |
| 946 | } \ |
| 947 | \ |
| 948 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ |
| 949 | __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ |
| 950 | bql_set_ ## NAME); |
| 951 | |
| 952 | BQL_ATTR(limit, limit) |
| 953 | BQL_ATTR(limit_max, max_limit) |
| 954 | BQL_ATTR(limit_min, min_limit) |
| 955 | |
| 956 | static struct attribute *dql_attrs[] = { |
| 957 | &bql_limit_attribute.attr, |
| 958 | &bql_limit_max_attribute.attr, |
| 959 | &bql_limit_min_attribute.attr, |
| 960 | &bql_hold_time_attribute.attr, |
| 961 | &bql_inflight_attribute.attr, |
| 962 | NULL |
| 963 | }; |
| 964 | |
| 965 | static struct attribute_group dql_group = { |
| 966 | .name = "byte_queue_limits", |
| 967 | .attrs = dql_attrs, |
| 968 | }; |
| 969 | #endif /* CONFIG_BQL */ |
| 970 | |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 971 | #ifdef CONFIG_XPS |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 972 | static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
| 973 | { |
| 974 | struct net_device *dev = queue->dev; |
| 975 | int i; |
| 976 | |
| 977 | for (i = 0; i < dev->num_tx_queues; i++) |
| 978 | if (queue == &dev->_tx[i]) |
| 979 | break; |
| 980 | |
| 981 | BUG_ON(i >= dev->num_tx_queues); |
| 982 | |
| 983 | return i; |
| 984 | } |
| 985 | |
| 986 | |
| 987 | static ssize_t show_xps_map(struct netdev_queue *queue, |
| 988 | struct netdev_queue_attribute *attribute, char *buf) |
| 989 | { |
| 990 | struct net_device *dev = queue->dev; |
| 991 | struct xps_dev_maps *dev_maps; |
| 992 | cpumask_var_t mask; |
| 993 | unsigned long index; |
| 994 | size_t len = 0; |
| 995 | int i; |
| 996 | |
| 997 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) |
| 998 | return -ENOMEM; |
| 999 | |
| 1000 | index = get_netdev_queue_index(queue); |
| 1001 | |
| 1002 | rcu_read_lock(); |
| 1003 | dev_maps = rcu_dereference(dev->xps_maps); |
| 1004 | if (dev_maps) { |
| 1005 | for_each_possible_cpu(i) { |
| 1006 | struct xps_map *map = |
| 1007 | rcu_dereference(dev_maps->cpu_map[i]); |
| 1008 | if (map) { |
| 1009 | int j; |
| 1010 | for (j = 0; j < map->len; j++) { |
| 1011 | if (map->queues[j] == index) { |
| 1012 | cpumask_set_cpu(i, mask); |
| 1013 | break; |
| 1014 | } |
| 1015 | } |
| 1016 | } |
| 1017 | } |
| 1018 | } |
| 1019 | rcu_read_unlock(); |
| 1020 | |
| 1021 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); |
| 1022 | if (PAGE_SIZE - len < 3) { |
| 1023 | free_cpumask_var(mask); |
| 1024 | return -EINVAL; |
| 1025 | } |
| 1026 | |
| 1027 | free_cpumask_var(mask); |
| 1028 | len += sprintf(buf + len, "\n"); |
| 1029 | return len; |
| 1030 | } |
| 1031 | |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1032 | static DEFINE_MUTEX(xps_map_mutex); |
Eric Dumazet | a417786 | 2010-11-28 21:43:02 +0000 | [diff] [blame] | 1033 | #define xmap_dereference(P) \ |
| 1034 | rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex)) |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1035 | |
Tom Herbert | 927fbec | 2011-11-28 16:33:02 +0000 | [diff] [blame] | 1036 | static void xps_queue_release(struct netdev_queue *queue) |
| 1037 | { |
| 1038 | struct net_device *dev = queue->dev; |
| 1039 | struct xps_dev_maps *dev_maps; |
| 1040 | struct xps_map *map; |
| 1041 | unsigned long index; |
| 1042 | int i, pos, nonempty = 0; |
| 1043 | |
| 1044 | index = get_netdev_queue_index(queue); |
| 1045 | |
| 1046 | mutex_lock(&xps_map_mutex); |
| 1047 | dev_maps = xmap_dereference(dev->xps_maps); |
| 1048 | |
| 1049 | if (dev_maps) { |
| 1050 | for_each_possible_cpu(i) { |
| 1051 | map = xmap_dereference(dev_maps->cpu_map[i]); |
| 1052 | if (!map) |
| 1053 | continue; |
| 1054 | |
| 1055 | for (pos = 0; pos < map->len; pos++) |
| 1056 | if (map->queues[pos] == index) |
| 1057 | break; |
| 1058 | |
| 1059 | if (pos < map->len) { |
| 1060 | if (map->len > 1) |
| 1061 | map->queues[pos] = |
| 1062 | map->queues[--map->len]; |
| 1063 | else { |
| 1064 | RCU_INIT_POINTER(dev_maps->cpu_map[i], |
| 1065 | NULL); |
| 1066 | kfree_rcu(map, rcu); |
| 1067 | map = NULL; |
| 1068 | } |
| 1069 | } |
| 1070 | if (map) |
| 1071 | nonempty = 1; |
| 1072 | } |
| 1073 | |
| 1074 | if (!nonempty) { |
| 1075 | RCU_INIT_POINTER(dev->xps_maps, NULL); |
| 1076 | kfree_rcu(dev_maps, rcu); |
| 1077 | } |
| 1078 | } |
| 1079 | mutex_unlock(&xps_map_mutex); |
| 1080 | } |
| 1081 | |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1082 | static ssize_t store_xps_map(struct netdev_queue *queue, |
| 1083 | struct netdev_queue_attribute *attribute, |
| 1084 | const char *buf, size_t len) |
| 1085 | { |
| 1086 | struct net_device *dev = queue->dev; |
| 1087 | cpumask_var_t mask; |
| 1088 | int err, i, cpu, pos, map_len, alloc_len, need_set; |
| 1089 | unsigned long index; |
| 1090 | struct xps_map *map, *new_map; |
| 1091 | struct xps_dev_maps *dev_maps, *new_dev_maps; |
| 1092 | int nonempty = 0; |
david decotigny | 19b05f8 | 2011-11-16 12:15:08 +0000 | [diff] [blame] | 1093 | int numa_node_id = -2; |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1094 | |
| 1095 | if (!capable(CAP_NET_ADMIN)) |
| 1096 | return -EPERM; |
| 1097 | |
| 1098 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
| 1099 | return -ENOMEM; |
| 1100 | |
| 1101 | index = get_netdev_queue_index(queue); |
| 1102 | |
| 1103 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); |
| 1104 | if (err) { |
| 1105 | free_cpumask_var(mask); |
| 1106 | return err; |
| 1107 | } |
| 1108 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame^] | 1109 | new_dev_maps = kzalloc(max_t(unsigned int, |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1110 | XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL); |
| 1111 | if (!new_dev_maps) { |
| 1112 | free_cpumask_var(mask); |
| 1113 | return -ENOMEM; |
| 1114 | } |
| 1115 | |
| 1116 | mutex_lock(&xps_map_mutex); |
| 1117 | |
Eric Dumazet | a417786 | 2010-11-28 21:43:02 +0000 | [diff] [blame] | 1118 | dev_maps = xmap_dereference(dev->xps_maps); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1119 | |
| 1120 | for_each_possible_cpu(cpu) { |
Eric Dumazet | a417786 | 2010-11-28 21:43:02 +0000 | [diff] [blame] | 1121 | map = dev_maps ? |
| 1122 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; |
| 1123 | new_map = map; |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1124 | if (map) { |
| 1125 | for (pos = 0; pos < map->len; pos++) |
| 1126 | if (map->queues[pos] == index) |
| 1127 | break; |
| 1128 | map_len = map->len; |
| 1129 | alloc_len = map->alloc_len; |
| 1130 | } else |
| 1131 | pos = map_len = alloc_len = 0; |
| 1132 | |
KOSAKI Motohiro | 2142c13 | 2011-05-16 11:53:49 -0700 | [diff] [blame] | 1133 | need_set = cpumask_test_cpu(cpu, mask) && cpu_online(cpu); |
Eric Dumazet | f2cd2d3 | 2010-11-29 08:14:37 +0000 | [diff] [blame] | 1134 | #ifdef CONFIG_NUMA |
| 1135 | if (need_set) { |
david decotigny | 19b05f8 | 2011-11-16 12:15:08 +0000 | [diff] [blame] | 1136 | if (numa_node_id == -2) |
| 1137 | numa_node_id = cpu_to_node(cpu); |
| 1138 | else if (numa_node_id != cpu_to_node(cpu)) |
| 1139 | numa_node_id = -1; |
Eric Dumazet | f2cd2d3 | 2010-11-29 08:14:37 +0000 | [diff] [blame] | 1140 | } |
| 1141 | #endif |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1142 | if (need_set && pos >= map_len) { |
| 1143 | /* Need to add queue to this CPU's map */ |
| 1144 | if (map_len >= alloc_len) { |
| 1145 | alloc_len = alloc_len ? |
| 1146 | 2 * alloc_len : XPS_MIN_MAP_ALLOC; |
Eric Dumazet | b02038a | 2010-11-28 05:43:24 +0000 | [diff] [blame] | 1147 | new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len), |
| 1148 | GFP_KERNEL, |
| 1149 | cpu_to_node(cpu)); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1150 | if (!new_map) |
| 1151 | goto error; |
| 1152 | new_map->alloc_len = alloc_len; |
| 1153 | for (i = 0; i < map_len; i++) |
| 1154 | new_map->queues[i] = map->queues[i]; |
| 1155 | new_map->len = map_len; |
| 1156 | } |
| 1157 | new_map->queues[new_map->len++] = index; |
| 1158 | } else if (!need_set && pos < map_len) { |
| 1159 | /* Need to remove queue from this CPU's map */ |
| 1160 | if (map_len > 1) |
| 1161 | new_map->queues[pos] = |
| 1162 | new_map->queues[--new_map->len]; |
| 1163 | else |
| 1164 | new_map = NULL; |
| 1165 | } |
Eric Dumazet | a417786 | 2010-11-28 21:43:02 +0000 | [diff] [blame] | 1166 | RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1167 | } |
| 1168 | |
| 1169 | /* Cleanup old maps */ |
| 1170 | for_each_possible_cpu(cpu) { |
Eric Dumazet | a417786 | 2010-11-28 21:43:02 +0000 | [diff] [blame] | 1171 | map = dev_maps ? |
| 1172 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; |
| 1173 | if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map) |
Lai Jiangshan | edc86d8 | 2011-03-18 12:02:20 +0800 | [diff] [blame] | 1174 | kfree_rcu(map, rcu); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1175 | if (new_dev_maps->cpu_map[cpu]) |
| 1176 | nonempty = 1; |
| 1177 | } |
| 1178 | |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 1179 | if (nonempty) { |
| 1180 | rcu_assign_pointer(dev->xps_maps, new_dev_maps); |
| 1181 | } else { |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1182 | kfree(new_dev_maps); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1183 | RCU_INIT_POINTER(dev->xps_maps, NULL); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1184 | } |
| 1185 | |
| 1186 | if (dev_maps) |
Lai Jiangshan | b55071e | 2011-03-18 12:02:47 +0800 | [diff] [blame] | 1187 | kfree_rcu(dev_maps, rcu); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1188 | |
david decotigny | 19b05f8 | 2011-11-16 12:15:08 +0000 | [diff] [blame] | 1189 | netdev_queue_numa_node_write(queue, (numa_node_id >= 0) ? numa_node_id : |
Changli Gao | b236da6 | 2010-12-14 03:09:15 +0000 | [diff] [blame] | 1190 | NUMA_NO_NODE); |
Eric Dumazet | f2cd2d3 | 2010-11-29 08:14:37 +0000 | [diff] [blame] | 1191 | |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1192 | mutex_unlock(&xps_map_mutex); |
| 1193 | |
| 1194 | free_cpumask_var(mask); |
| 1195 | return len; |
| 1196 | |
| 1197 | error: |
| 1198 | mutex_unlock(&xps_map_mutex); |
| 1199 | |
| 1200 | if (new_dev_maps) |
| 1201 | for_each_possible_cpu(i) |
Eric Dumazet | a417786 | 2010-11-28 21:43:02 +0000 | [diff] [blame] | 1202 | kfree(rcu_dereference_protected( |
| 1203 | new_dev_maps->cpu_map[i], |
| 1204 | 1)); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1205 | kfree(new_dev_maps); |
| 1206 | free_cpumask_var(mask); |
| 1207 | return -ENOMEM; |
| 1208 | } |
| 1209 | |
| 1210 | static struct netdev_queue_attribute xps_cpus_attribute = |
| 1211 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1212 | #endif /* CONFIG_XPS */ |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1213 | |
| 1214 | static struct attribute *netdev_queue_default_attrs[] = { |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1215 | &queue_trans_timeout.attr, |
| 1216 | #ifdef CONFIG_XPS |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1217 | &xps_cpus_attribute.attr, |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1218 | #endif |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1219 | NULL |
| 1220 | }; |
| 1221 | |
| 1222 | static void netdev_queue_release(struct kobject *kobj) |
| 1223 | { |
| 1224 | struct netdev_queue *queue = to_netdev_queue(kobj); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1225 | |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1226 | #ifdef CONFIG_XPS |
Tom Herbert | 927fbec | 2011-11-28 16:33:02 +0000 | [diff] [blame] | 1227 | xps_queue_release(queue); |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1228 | #endif |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1229 | |
| 1230 | memset(kobj, 0, sizeof(*kobj)); |
| 1231 | dev_put(queue->dev); |
| 1232 | } |
| 1233 | |
| 1234 | static struct kobj_type netdev_queue_ktype = { |
| 1235 | .sysfs_ops = &netdev_queue_sysfs_ops, |
| 1236 | .release = netdev_queue_release, |
| 1237 | .default_attrs = netdev_queue_default_attrs, |
| 1238 | }; |
| 1239 | |
| 1240 | static int netdev_queue_add_kobject(struct net_device *net, int index) |
| 1241 | { |
| 1242 | struct netdev_queue *queue = net->_tx + index; |
| 1243 | struct kobject *kobj = &queue->kobj; |
| 1244 | int error = 0; |
| 1245 | |
| 1246 | kobj->kset = net->queues_kset; |
| 1247 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, |
| 1248 | "tx-%u", index); |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1249 | if (error) |
| 1250 | goto exit; |
| 1251 | |
| 1252 | #ifdef CONFIG_BQL |
| 1253 | error = sysfs_create_group(kobj, &dql_group); |
| 1254 | if (error) |
| 1255 | goto exit; |
| 1256 | #endif |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1257 | |
| 1258 | kobject_uevent(kobj, KOBJ_ADD); |
| 1259 | dev_hold(queue->dev); |
| 1260 | |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1261 | return 0; |
| 1262 | exit: |
| 1263 | kobject_put(kobj); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1264 | return error; |
| 1265 | } |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1266 | #endif /* CONFIG_SYSFS */ |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1267 | |
| 1268 | int |
| 1269 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) |
| 1270 | { |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1271 | #ifdef CONFIG_SYSFS |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1272 | int i; |
| 1273 | int error = 0; |
| 1274 | |
| 1275 | for (i = old_num; i < new_num; i++) { |
| 1276 | error = netdev_queue_add_kobject(net, i); |
| 1277 | if (error) { |
| 1278 | new_num = old_num; |
| 1279 | break; |
| 1280 | } |
| 1281 | } |
| 1282 | |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1283 | while (--i >= new_num) { |
| 1284 | struct netdev_queue *queue = net->_tx + i; |
| 1285 | |
| 1286 | #ifdef CONFIG_BQL |
| 1287 | sysfs_remove_group(&queue->kobj, &dql_group); |
| 1288 | #endif |
| 1289 | kobject_put(&queue->kobj); |
| 1290 | } |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1291 | |
| 1292 | return error; |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1293 | #else |
| 1294 | return 0; |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1295 | #endif /* CONFIG_SYSFS */ |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1296 | } |
| 1297 | |
| 1298 | static int register_queue_kobjects(struct net_device *net) |
| 1299 | { |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1300 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1301 | |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1302 | #ifdef CONFIG_SYSFS |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 1303 | net->queues_kset = kset_create_and_add("queues", |
| 1304 | NULL, &net->dev.kobj); |
| 1305 | if (!net->queues_kset) |
| 1306 | return -ENOMEM; |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1307 | #endif |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1308 | |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1309 | #ifdef CONFIG_RPS |
| 1310 | real_rx = net->real_num_rx_queues; |
| 1311 | #endif |
| 1312 | real_tx = net->real_num_tx_queues; |
| 1313 | |
| 1314 | error = net_rx_queue_update_kobjects(net, 0, real_rx); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1315 | if (error) |
| 1316 | goto error; |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1317 | rxq = real_rx; |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1318 | |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1319 | error = netdev_queue_update_kobjects(net, 0, real_tx); |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1320 | if (error) |
| 1321 | goto error; |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1322 | txq = real_tx; |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1323 | |
| 1324 | return 0; |
| 1325 | |
| 1326 | error: |
| 1327 | netdev_queue_update_kobjects(net, txq, 0); |
| 1328 | net_rx_queue_update_kobjects(net, rxq, 0); |
| 1329 | return error; |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 1330 | } |
| 1331 | |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1332 | static void remove_queue_kobjects(struct net_device *net) |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1333 | { |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1334 | int real_rx = 0, real_tx = 0; |
| 1335 | |
| 1336 | #ifdef CONFIG_RPS |
| 1337 | real_rx = net->real_num_rx_queues; |
| 1338 | #endif |
| 1339 | real_tx = net->real_num_tx_queues; |
| 1340 | |
| 1341 | net_rx_queue_update_kobjects(net, real_rx, 0); |
| 1342 | netdev_queue_update_kobjects(net, real_tx, 0); |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1343 | #ifdef CONFIG_SYSFS |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1344 | kset_unregister(net->queues_kset); |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1345 | #endif |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1346 | } |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1347 | |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 1348 | static void *net_grab_current_ns(void) |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1349 | { |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 1350 | struct net *ns = current->nsproxy->net_ns; |
| 1351 | #ifdef CONFIG_NET_NS |
| 1352 | if (ns) |
| 1353 | atomic_inc(&ns->passive); |
| 1354 | #endif |
| 1355 | return ns; |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1356 | } |
| 1357 | |
| 1358 | static const void *net_initial_ns(void) |
| 1359 | { |
| 1360 | return &init_net; |
| 1361 | } |
| 1362 | |
| 1363 | static const void *net_netlink_ns(struct sock *sk) |
| 1364 | { |
| 1365 | return sock_net(sk); |
| 1366 | } |
| 1367 | |
Johannes Berg | 0460079 | 2010-08-05 17:45:15 +0200 | [diff] [blame] | 1368 | struct kobj_ns_type_operations net_ns_type_operations = { |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1369 | .type = KOBJ_NS_TYPE_NET, |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 1370 | .grab_current_ns = net_grab_current_ns, |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1371 | .netlink_ns = net_netlink_ns, |
| 1372 | .initial_ns = net_initial_ns, |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 1373 | .drop_ns = net_drop_ns, |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1374 | }; |
Johannes Berg | 0460079 | 2010-08-05 17:45:15 +0200 | [diff] [blame] | 1375 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | #ifdef CONFIG_HOTPLUG |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1378 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1380 | struct net_device *dev = to_net_dev(d); |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1381 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 1383 | /* pass interface to uevent. */ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1384 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
Eric Rannaud | bf62456 | 2007-03-30 22:23:12 -0700 | [diff] [blame] | 1385 | if (retval) |
| 1386 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | |
Jean Tourrilhes | ca2f37d | 2007-03-07 10:49:30 -0800 | [diff] [blame] | 1388 | /* pass ifindex to uevent. |
| 1389 | * ifindex is useful as it won't change (interface name may change) |
| 1390 | * and is what RtNetlink uses natively. */ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1391 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
Jean Tourrilhes | ca2f37d | 2007-03-07 10:49:30 -0800 | [diff] [blame] | 1392 | |
Eric Rannaud | bf62456 | 2007-03-30 22:23:12 -0700 | [diff] [blame] | 1393 | exit: |
Eric Rannaud | bf62456 | 2007-03-30 22:23:12 -0700 | [diff] [blame] | 1394 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | } |
| 1396 | #endif |
| 1397 | |
| 1398 | /* |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1399 | * netdev_release -- destroy and free a dead device. |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1400 | * Called when last reference to device kobject is gone. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1402 | static void netdev_release(struct device *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1404 | struct net_device *dev = to_net_dev(d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | |
| 1406 | BUG_ON(dev->reg_state != NETREG_RELEASED); |
| 1407 | |
Stephen Hemminger | 0b815a1 | 2008-09-22 21:28:11 -0700 | [diff] [blame] | 1408 | kfree(dev->ifalias); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | kfree((char *)dev - dev->padded); |
| 1410 | } |
| 1411 | |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1412 | static const void *net_namespace(struct device *d) |
| 1413 | { |
| 1414 | struct net_device *dev; |
| 1415 | dev = container_of(d, struct net_device, dev); |
| 1416 | return dev_net(dev); |
| 1417 | } |
| 1418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | static struct class net_class = { |
| 1420 | .name = "net", |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1421 | .dev_release = netdev_release, |
Eric W. Biederman | 8b41d18 | 2007-09-26 22:02:53 -0700 | [diff] [blame] | 1422 | #ifdef CONFIG_SYSFS |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1423 | .dev_attrs = net_class_attributes, |
Eric W. Biederman | 8b41d18 | 2007-09-26 22:02:53 -0700 | [diff] [blame] | 1424 | #endif /* CONFIG_SYSFS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | #ifdef CONFIG_HOTPLUG |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1426 | .dev_uevent = netdev_uevent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | #endif |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1428 | .ns_type = &net_ns_type_operations, |
| 1429 | .namespace = net_namespace, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | }; |
| 1431 | |
Stephen Hemminger | 9093bbb | 2007-05-19 15:39:25 -0700 | [diff] [blame] | 1432 | /* Delete sysfs entries but hold kobject reference until after all |
| 1433 | * netdev references are gone. |
| 1434 | */ |
Eric W. Biederman | 8b41d18 | 2007-09-26 22:02:53 -0700 | [diff] [blame] | 1435 | void netdev_unregister_kobject(struct net_device * net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | { |
Stephen Hemminger | 9093bbb | 2007-05-19 15:39:25 -0700 | [diff] [blame] | 1437 | struct device *dev = &(net->dev); |
| 1438 | |
| 1439 | kobject_get(&dev->kobj); |
Eric W. Biederman | 3891845 | 2008-10-27 17:51:47 -0700 | [diff] [blame] | 1440 | |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1441 | remove_queue_kobjects(net); |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1442 | |
Stephen Hemminger | 9093bbb | 2007-05-19 15:39:25 -0700 | [diff] [blame] | 1443 | device_del(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | } |
| 1445 | |
| 1446 | /* Create sysfs entries for network device. */ |
Eric W. Biederman | 8b41d18 | 2007-09-26 22:02:53 -0700 | [diff] [blame] | 1447 | int netdev_register_kobject(struct net_device *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1449 | struct device *dev = &(net->dev); |
David Brownell | a4dbd67 | 2009-06-24 10:06:31 -0700 | [diff] [blame] | 1450 | const struct attribute_group **groups = net->sysfs_groups; |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1451 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | |
Eric W. Biederman | a1b3f59 | 2010-05-04 17:36:49 -0700 | [diff] [blame] | 1453 | device_initialize(dev); |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1454 | dev->class = &net_class; |
| 1455 | dev->platform_data = net; |
| 1456 | dev->groups = groups; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
Stephen Hemminger | a220547 | 2009-03-09 13:51:55 +0000 | [diff] [blame] | 1458 | dev_set_name(dev, "%s", net->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | |
Eric W. Biederman | 8b41d18 | 2007-09-26 22:02:53 -0700 | [diff] [blame] | 1460 | #ifdef CONFIG_SYSFS |
Eric W. Biederman | 0c509a6 | 2009-10-29 14:18:21 +0000 | [diff] [blame] | 1461 | /* Allow for a device specific group */ |
| 1462 | if (*groups) |
| 1463 | groups++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | |
Eric W. Biederman | 0c509a6 | 2009-10-29 14:18:21 +0000 | [diff] [blame] | 1465 | *groups++ = &netstat_group; |
Johannes Berg | 22bb1be | 2008-07-10 11:16:47 +0200 | [diff] [blame] | 1466 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1467 | if (net->ieee80211_ptr) |
Stephen Hemminger | fe9925b | 2006-05-06 17:56:03 -0700 | [diff] [blame] | 1468 | *groups++ = &wireless_group; |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1469 | #ifdef CONFIG_WIRELESS_EXT |
| 1470 | else if (net->wireless_handlers) |
| 1471 | *groups++ = &wireless_group; |
| 1472 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | #endif |
Eric W. Biederman | 8b41d18 | 2007-09-26 22:02:53 -0700 | [diff] [blame] | 1474 | #endif /* CONFIG_SYSFS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1476 | error = device_add(dev); |
| 1477 | if (error) |
| 1478 | return error; |
| 1479 | |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1480 | error = register_queue_kobjects(net); |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1481 | if (error) { |
| 1482 | device_del(dev); |
| 1483 | return error; |
| 1484 | } |
| 1485 | |
| 1486 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | } |
| 1488 | |
Jay Vosburgh | b8a9787 | 2008-06-13 18:12:04 -0700 | [diff] [blame] | 1489 | int netdev_class_create_file(struct class_attribute *class_attr) |
| 1490 | { |
| 1491 | return class_create_file(&net_class, class_attr); |
| 1492 | } |
Eric Dumazet | 9e34a5b | 2010-07-09 21:22:04 +0000 | [diff] [blame] | 1493 | EXPORT_SYMBOL(netdev_class_create_file); |
Jay Vosburgh | b8a9787 | 2008-06-13 18:12:04 -0700 | [diff] [blame] | 1494 | |
| 1495 | void netdev_class_remove_file(struct class_attribute *class_attr) |
| 1496 | { |
| 1497 | class_remove_file(&net_class, class_attr); |
| 1498 | } |
Jay Vosburgh | b8a9787 | 2008-06-13 18:12:04 -0700 | [diff] [blame] | 1499 | EXPORT_SYMBOL(netdev_class_remove_file); |
| 1500 | |
Eric W. Biederman | 8b41d18 | 2007-09-26 22:02:53 -0700 | [diff] [blame] | 1501 | int netdev_kobject_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | { |
Eric W. Biederman | 608b4b9 | 2010-05-04 17:36:45 -0700 | [diff] [blame] | 1503 | kobj_ns_type_register(&net_ns_type_operations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | return class_register(&net_class); |
| 1505 | } |