Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * net-sysfs.c - network device class and attributes | |
4 | * | |
5 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
1da177e4 LT |
6 | */ |
7 | ||
4fc268d2 | 8 | #include <linux/capability.h> |
1da177e4 LT |
9 | #include <linux/kernel.h> |
10 | #include <linux/netdevice.h> | |
11 | #include <linux/if_arp.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
174cd4b1 | 13 | #include <linux/sched/signal.h> |
608b4b95 | 14 | #include <linux/nsproxy.h> |
1da177e4 | 15 | #include <net/sock.h> |
608b4b95 | 16 | #include <net/net_namespace.h> |
1da177e4 | 17 | #include <linux/rtnetlink.h> |
fec5e652 | 18 | #include <linux/vmalloc.h> |
bc3b2d7f | 19 | #include <linux/export.h> |
114cf580 | 20 | #include <linux/jiffies.h> |
9802c8e2 | 21 | #include <linux/pm_runtime.h> |
aa836df9 | 22 | #include <linux/of.h> |
88832a22 | 23 | #include <linux/of_net.h> |
4d99f660 | 24 | #include <linux/cpu.h> |
1da177e4 | 25 | |
342709ef PE |
26 | #include "net-sysfs.h" |
27 | ||
8b41d188 | 28 | #ifdef CONFIG_SYSFS |
1da177e4 LT |
29 | static const char fmt_hex[] = "%#x\n"; |
30 | static const char fmt_dec[] = "%d\n"; | |
31 | static const char fmt_ulong[] = "%lu\n"; | |
be1f3c2c | 32 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 33 | |
4ec93edb | 34 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 35 | { |
fe9925b5 | 36 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
37 | } |
38 | ||
39 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
40 | static ssize_t netdev_show(const struct device *dev, |
41 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
42 | ssize_t (*format)(const struct net_device *, char *)) |
43 | { | |
6b53dafe | 44 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
45 | ssize_t ret = -EINVAL; |
46 | ||
47 | read_lock(&dev_base_lock); | |
6b53dafe WC |
48 | if (dev_isalive(ndev)) |
49 | ret = (*format)(ndev, buf); | |
1da177e4 LT |
50 | read_unlock(&dev_base_lock); |
51 | ||
52 | return ret; | |
53 | } | |
54 | ||
55 | /* generate a show function for simple field */ | |
56 | #define NETDEVICE_SHOW(field, format_string) \ | |
6b53dafe | 57 | static ssize_t format_##field(const struct net_device *dev, char *buf) \ |
1da177e4 | 58 | { \ |
6b53dafe | 59 | return sprintf(buf, format_string, dev->field); \ |
1da177e4 | 60 | } \ |
6be8aeef | 61 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 62 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 63 | { \ |
43cb76d9 | 64 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
65 | } \ |
66 | ||
67 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
68 | NETDEVICE_SHOW(field, format_string); \ | |
69 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 70 | |
6be8aeef GKH |
71 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
72 | NETDEVICE_SHOW(field, format_string); \ | |
73 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
74 | |
75 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 76 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
77 | const char *buf, size_t len, |
78 | int (*set)(struct net_device *, unsigned long)) | |
79 | { | |
5e1fccc0 EB |
80 | struct net_device *netdev = to_net_dev(dev); |
81 | struct net *net = dev_net(netdev); | |
1da177e4 LT |
82 | unsigned long new; |
83 | int ret = -EINVAL; | |
84 | ||
5e1fccc0 | 85 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
86 | return -EPERM; |
87 | ||
e1e420c7 SK |
88 | ret = kstrtoul(buf, 0, &new); |
89 | if (ret) | |
1da177e4 LT |
90 | goto err; |
91 | ||
5a5990d3 | 92 | if (!rtnl_trylock()) |
336ca57c | 93 | return restart_syscall(); |
5a5990d3 | 94 | |
5e1fccc0 | 95 | if (dev_isalive(netdev)) { |
6648c65e | 96 | ret = (*set)(netdev, new); |
97 | if (ret == 0) | |
1da177e4 LT |
98 | ret = len; |
99 | } | |
100 | rtnl_unlock(); | |
101 | err: | |
102 | return ret; | |
103 | } | |
104 | ||
6be8aeef | 105 | NETDEVICE_SHOW_RO(dev_id, fmt_hex); |
3f85944f | 106 | NETDEVICE_SHOW_RO(dev_port, fmt_dec); |
6be8aeef GKH |
107 | NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); |
108 | NETDEVICE_SHOW_RO(addr_len, fmt_dec); | |
6be8aeef GKH |
109 | NETDEVICE_SHOW_RO(ifindex, fmt_dec); |
110 | NETDEVICE_SHOW_RO(type, fmt_dec); | |
111 | NETDEVICE_SHOW_RO(link_mode, fmt_dec); | |
1da177e4 | 112 | |
a54acb3a ND |
113 | static ssize_t iflink_show(struct device *dev, struct device_attribute *attr, |
114 | char *buf) | |
115 | { | |
116 | struct net_device *ndev = to_net_dev(dev); | |
117 | ||
118 | return sprintf(buf, fmt_dec, dev_get_iflink(ndev)); | |
119 | } | |
120 | static DEVICE_ATTR_RO(iflink); | |
121 | ||
6b53dafe | 122 | static ssize_t format_name_assign_type(const struct net_device *dev, char *buf) |
685343fc | 123 | { |
6b53dafe | 124 | return sprintf(buf, fmt_dec, dev->name_assign_type); |
685343fc TG |
125 | } |
126 | ||
127 | static ssize_t name_assign_type_show(struct device *dev, | |
128 | struct device_attribute *attr, | |
129 | char *buf) | |
130 | { | |
6b53dafe | 131 | struct net_device *ndev = to_net_dev(dev); |
685343fc TG |
132 | ssize_t ret = -EINVAL; |
133 | ||
6b53dafe | 134 | if (ndev->name_assign_type != NET_NAME_UNKNOWN) |
685343fc TG |
135 | ret = netdev_show(dev, attr, buf, format_name_assign_type); |
136 | ||
137 | return ret; | |
138 | } | |
139 | static DEVICE_ATTR_RO(name_assign_type); | |
140 | ||
1da177e4 | 141 | /* use same locking rules as GIFHWADDR ioctl's */ |
6be8aeef | 142 | static ssize_t address_show(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 143 | char *buf) |
1da177e4 | 144 | { |
6b53dafe | 145 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
146 | ssize_t ret = -EINVAL; |
147 | ||
148 | read_lock(&dev_base_lock); | |
6b53dafe WC |
149 | if (dev_isalive(ndev)) |
150 | ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len); | |
1da177e4 LT |
151 | read_unlock(&dev_base_lock); |
152 | return ret; | |
153 | } | |
6be8aeef | 154 | static DEVICE_ATTR_RO(address); |
1da177e4 | 155 | |
6be8aeef GKH |
156 | static ssize_t broadcast_show(struct device *dev, |
157 | struct device_attribute *attr, char *buf) | |
1da177e4 | 158 | { |
6b53dafe | 159 | struct net_device *ndev = to_net_dev(dev); |
6648c65e | 160 | |
6b53dafe WC |
161 | if (dev_isalive(ndev)) |
162 | return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); | |
1da177e4 LT |
163 | return -EINVAL; |
164 | } | |
6be8aeef | 165 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 166 | |
6b53dafe | 167 | static int change_carrier(struct net_device *dev, unsigned long new_carrier) |
fdae0fde | 168 | { |
6b53dafe | 169 | if (!netif_running(dev)) |
fdae0fde | 170 | return -EINVAL; |
6648c65e | 171 | return dev_change_carrier(dev, (bool)new_carrier); |
fdae0fde JP |
172 | } |
173 | ||
6be8aeef GKH |
174 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
175 | const char *buf, size_t len) | |
fdae0fde JP |
176 | { |
177 | return netdev_store(dev, attr, buf, len, change_carrier); | |
178 | } | |
179 | ||
6be8aeef | 180 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 181 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
182 | { |
183 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 184 | |
185 | if (netif_running(netdev)) | |
1da177e4 | 186 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); |
6648c65e | 187 | |
1da177e4 LT |
188 | return -EINVAL; |
189 | } | |
6be8aeef | 190 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 191 | |
6be8aeef | 192 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
193 | struct device_attribute *attr, char *buf) |
194 | { | |
195 | struct net_device *netdev = to_net_dev(dev); | |
196 | int ret = -EINVAL; | |
197 | ||
198 | if (!rtnl_trylock()) | |
199 | return restart_syscall(); | |
200 | ||
8ae6daca | 201 | if (netif_running(netdev)) { |
7cad1bac DD |
202 | struct ethtool_link_ksettings cmd; |
203 | ||
204 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) | |
205 | ret = sprintf(buf, fmt_dec, cmd.base.speed); | |
d519e17e AG |
206 | } |
207 | rtnl_unlock(); | |
208 | return ret; | |
209 | } | |
6be8aeef | 210 | static DEVICE_ATTR_RO(speed); |
d519e17e | 211 | |
6be8aeef | 212 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
213 | struct device_attribute *attr, char *buf) |
214 | { | |
215 | struct net_device *netdev = to_net_dev(dev); | |
216 | int ret = -EINVAL; | |
217 | ||
218 | if (!rtnl_trylock()) | |
219 | return restart_syscall(); | |
220 | ||
8ae6daca | 221 | if (netif_running(netdev)) { |
7cad1bac DD |
222 | struct ethtool_link_ksettings cmd; |
223 | ||
224 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) { | |
c6c13965 | 225 | const char *duplex; |
7cad1bac DD |
226 | |
227 | switch (cmd.base.duplex) { | |
c6c13965 NA |
228 | case DUPLEX_HALF: |
229 | duplex = "half"; | |
230 | break; | |
231 | case DUPLEX_FULL: | |
232 | duplex = "full"; | |
233 | break; | |
234 | default: | |
235 | duplex = "unknown"; | |
236 | break; | |
237 | } | |
238 | ret = sprintf(buf, "%s\n", duplex); | |
239 | } | |
d519e17e AG |
240 | } |
241 | rtnl_unlock(); | |
242 | return ret; | |
243 | } | |
6be8aeef | 244 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 245 | |
6be8aeef | 246 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 247 | struct device_attribute *attr, char *buf) |
b00055aa SR |
248 | { |
249 | struct net_device *netdev = to_net_dev(dev); | |
250 | ||
251 | if (netif_running(netdev)) | |
252 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
253 | ||
254 | return -EINVAL; | |
255 | } | |
6be8aeef | 256 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 257 | |
36cbd3dc | 258 | static const char *const operstates[] = { |
b00055aa SR |
259 | "unknown", |
260 | "notpresent", /* currently unused */ | |
261 | "down", | |
262 | "lowerlayerdown", | |
263 | "testing", /* currently unused */ | |
264 | "dormant", | |
265 | "up" | |
266 | }; | |
267 | ||
6be8aeef | 268 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 269 | struct device_attribute *attr, char *buf) |
b00055aa SR |
270 | { |
271 | const struct net_device *netdev = to_net_dev(dev); | |
272 | unsigned char operstate; | |
273 | ||
274 | read_lock(&dev_base_lock); | |
275 | operstate = netdev->operstate; | |
276 | if (!netif_running(netdev)) | |
277 | operstate = IF_OPER_DOWN; | |
278 | read_unlock(&dev_base_lock); | |
279 | ||
e3a5cd9e | 280 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
281 | return -EINVAL; /* should not happen */ |
282 | ||
283 | return sprintf(buf, "%s\n", operstates[operstate]); | |
284 | } | |
6be8aeef | 285 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 286 | |
2d3b479d | 287 | static ssize_t carrier_changes_show(struct device *dev, |
288 | struct device_attribute *attr, | |
289 | char *buf) | |
290 | { | |
291 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 292 | |
2d3b479d | 293 | return sprintf(buf, fmt_dec, |
b2d3bcfa DD |
294 | atomic_read(&netdev->carrier_up_count) + |
295 | atomic_read(&netdev->carrier_down_count)); | |
2d3b479d | 296 | } |
297 | static DEVICE_ATTR_RO(carrier_changes); | |
298 | ||
b2d3bcfa DD |
299 | static ssize_t carrier_up_count_show(struct device *dev, |
300 | struct device_attribute *attr, | |
301 | char *buf) | |
302 | { | |
303 | struct net_device *netdev = to_net_dev(dev); | |
304 | ||
305 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_up_count)); | |
306 | } | |
307 | static DEVICE_ATTR_RO(carrier_up_count); | |
308 | ||
309 | static ssize_t carrier_down_count_show(struct device *dev, | |
310 | struct device_attribute *attr, | |
311 | char *buf) | |
312 | { | |
313 | struct net_device *netdev = to_net_dev(dev); | |
314 | ||
315 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_down_count)); | |
316 | } | |
317 | static DEVICE_ATTR_RO(carrier_down_count); | |
318 | ||
1da177e4 | 319 | /* read-write attributes */ |
1da177e4 | 320 | |
6b53dafe | 321 | static int change_mtu(struct net_device *dev, unsigned long new_mtu) |
1da177e4 | 322 | { |
6648c65e | 323 | return dev_set_mtu(dev, (int)new_mtu); |
1da177e4 LT |
324 | } |
325 | ||
6be8aeef | 326 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 327 | const char *buf, size_t len) |
1da177e4 | 328 | { |
43cb76d9 | 329 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 330 | } |
6be8aeef | 331 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 | 332 | |
6b53dafe | 333 | static int change_flags(struct net_device *dev, unsigned long new_flags) |
1da177e4 | 334 | { |
567c5e13 | 335 | return dev_change_flags(dev, (unsigned int)new_flags, NULL); |
1da177e4 LT |
336 | } |
337 | ||
6be8aeef | 338 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 339 | const char *buf, size_t len) |
1da177e4 | 340 | { |
43cb76d9 | 341 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 342 | } |
6be8aeef | 343 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 | 344 | |
6be8aeef | 345 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
346 | struct device_attribute *attr, |
347 | const char *buf, size_t len) | |
1da177e4 | 348 | { |
5e1fccc0 EB |
349 | if (!capable(CAP_NET_ADMIN)) |
350 | return -EPERM; | |
351 | ||
6a643ddb | 352 | return netdev_store(dev, attr, buf, len, dev_change_tx_queue_len); |
1da177e4 | 353 | } |
0cd29503 | 354 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_dec); |
1da177e4 | 355 | |
3b47d303 ED |
356 | static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) |
357 | { | |
358 | dev->gro_flush_timeout = val; | |
359 | return 0; | |
360 | } | |
361 | ||
362 | static ssize_t gro_flush_timeout_store(struct device *dev, | |
6648c65e | 363 | struct device_attribute *attr, |
364 | const char *buf, size_t len) | |
3b47d303 ED |
365 | { |
366 | if (!capable(CAP_NET_ADMIN)) | |
367 | return -EPERM; | |
368 | ||
369 | return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); | |
370 | } | |
371 | NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); | |
372 | ||
6be8aeef | 373 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
374 | const char *buf, size_t len) |
375 | { | |
376 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 377 | struct net *net = dev_net(netdev); |
0b815a1a | 378 | size_t count = len; |
c92eb77a | 379 | ssize_t ret = 0; |
0b815a1a | 380 | |
5e1fccc0 | 381 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
382 | return -EPERM; |
383 | ||
384 | /* ignore trailing newline */ | |
385 | if (len > 0 && buf[len - 1] == '\n') | |
386 | --count; | |
387 | ||
c92eb77a RP |
388 | if (!rtnl_trylock()) |
389 | return restart_syscall(); | |
0b815a1a | 390 | |
c92eb77a RP |
391 | if (dev_isalive(netdev)) { |
392 | ret = dev_set_alias(netdev, buf, count); | |
393 | if (ret < 0) | |
394 | goto err; | |
395 | ret = len; | |
396 | netdev_state_change(netdev); | |
397 | } | |
398 | err: | |
399 | rtnl_unlock(); | |
400 | ||
401 | return ret; | |
0b815a1a SH |
402 | } |
403 | ||
6be8aeef | 404 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
405 | struct device_attribute *attr, char *buf) |
406 | { | |
407 | const struct net_device *netdev = to_net_dev(dev); | |
6c557001 | 408 | char tmp[IFALIASZ]; |
0b815a1a SH |
409 | ssize_t ret = 0; |
410 | ||
6c557001 FW |
411 | ret = dev_get_alias(netdev, tmp, sizeof(tmp)); |
412 | if (ret > 0) | |
413 | ret = sprintf(buf, "%s\n", tmp); | |
0b815a1a SH |
414 | return ret; |
415 | } | |
6be8aeef | 416 | static DEVICE_ATTR_RW(ifalias); |
a512b92b | 417 | |
6b53dafe | 418 | static int change_group(struct net_device *dev, unsigned long new_group) |
a512b92b | 419 | { |
6648c65e | 420 | dev_set_group(dev, (int)new_group); |
a512b92b VD |
421 | return 0; |
422 | } | |
423 | ||
6be8aeef GKH |
424 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
425 | const char *buf, size_t len) | |
a512b92b VD |
426 | { |
427 | return netdev_store(dev, attr, buf, len, change_group); | |
428 | } | |
6be8aeef | 429 | NETDEVICE_SHOW(group, fmt_dec); |
d6444062 | 430 | static DEVICE_ATTR(netdev_group, 0644, group_show, group_store); |
6be8aeef | 431 | |
d746d707 AK |
432 | static int change_proto_down(struct net_device *dev, unsigned long proto_down) |
433 | { | |
6648c65e | 434 | return dev_change_proto_down(dev, (bool)proto_down); |
d746d707 AK |
435 | } |
436 | ||
437 | static ssize_t proto_down_store(struct device *dev, | |
438 | struct device_attribute *attr, | |
439 | const char *buf, size_t len) | |
440 | { | |
441 | return netdev_store(dev, attr, buf, len, change_proto_down); | |
442 | } | |
443 | NETDEVICE_SHOW_RW(proto_down, fmt_dec); | |
444 | ||
cc998ff8 | 445 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
446 | struct device_attribute *attr, char *buf) |
447 | { | |
448 | struct net_device *netdev = to_net_dev(dev); | |
449 | ssize_t ret = -EINVAL; | |
450 | ||
451 | if (!rtnl_trylock()) | |
452 | return restart_syscall(); | |
453 | ||
454 | if (dev_isalive(netdev)) { | |
02637fce | 455 | struct netdev_phys_item_id ppid; |
ff80e519 JP |
456 | |
457 | ret = dev_get_phys_port_id(netdev, &ppid); | |
458 | if (!ret) | |
459 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
460 | } | |
461 | rtnl_unlock(); | |
462 | ||
463 | return ret; | |
464 | } | |
cc998ff8 LT |
465 | static DEVICE_ATTR_RO(phys_port_id); |
466 | ||
db24a904 DA |
467 | static ssize_t phys_port_name_show(struct device *dev, |
468 | struct device_attribute *attr, char *buf) | |
469 | { | |
470 | struct net_device *netdev = to_net_dev(dev); | |
471 | ssize_t ret = -EINVAL; | |
472 | ||
473 | if (!rtnl_trylock()) | |
474 | return restart_syscall(); | |
475 | ||
476 | if (dev_isalive(netdev)) { | |
477 | char name[IFNAMSIZ]; | |
478 | ||
479 | ret = dev_get_phys_port_name(netdev, name, sizeof(name)); | |
480 | if (!ret) | |
481 | ret = sprintf(buf, "%s\n", name); | |
482 | } | |
483 | rtnl_unlock(); | |
484 | ||
485 | return ret; | |
486 | } | |
487 | static DEVICE_ATTR_RO(phys_port_name); | |
488 | ||
aecbe01e JP |
489 | static ssize_t phys_switch_id_show(struct device *dev, |
490 | struct device_attribute *attr, char *buf) | |
491 | { | |
492 | struct net_device *netdev = to_net_dev(dev); | |
493 | ssize_t ret = -EINVAL; | |
494 | ||
495 | if (!rtnl_trylock()) | |
496 | return restart_syscall(); | |
497 | ||
498 | if (dev_isalive(netdev)) { | |
bccb3025 FF |
499 | struct netdev_phys_item_id ppid = { }; |
500 | ||
501 | ret = dev_get_port_parent_id(netdev, &ppid, false); | |
aecbe01e | 502 | if (!ret) |
bccb3025 | 503 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); |
aecbe01e JP |
504 | } |
505 | rtnl_unlock(); | |
506 | ||
507 | return ret; | |
508 | } | |
509 | static DEVICE_ATTR_RO(phys_switch_id); | |
510 | ||
ec6cc599 | 511 | static struct attribute *net_class_attrs[] __ro_after_init = { |
6be8aeef GKH |
512 | &dev_attr_netdev_group.attr, |
513 | &dev_attr_type.attr, | |
514 | &dev_attr_dev_id.attr, | |
3f85944f | 515 | &dev_attr_dev_port.attr, |
6be8aeef GKH |
516 | &dev_attr_iflink.attr, |
517 | &dev_attr_ifindex.attr, | |
685343fc | 518 | &dev_attr_name_assign_type.attr, |
6be8aeef GKH |
519 | &dev_attr_addr_assign_type.attr, |
520 | &dev_attr_addr_len.attr, | |
521 | &dev_attr_link_mode.attr, | |
522 | &dev_attr_address.attr, | |
523 | &dev_attr_broadcast.attr, | |
524 | &dev_attr_speed.attr, | |
525 | &dev_attr_duplex.attr, | |
526 | &dev_attr_dormant.attr, | |
527 | &dev_attr_operstate.attr, | |
2d3b479d | 528 | &dev_attr_carrier_changes.attr, |
6be8aeef GKH |
529 | &dev_attr_ifalias.attr, |
530 | &dev_attr_carrier.attr, | |
531 | &dev_attr_mtu.attr, | |
532 | &dev_attr_flags.attr, | |
533 | &dev_attr_tx_queue_len.attr, | |
3b47d303 | 534 | &dev_attr_gro_flush_timeout.attr, |
cc998ff8 | 535 | &dev_attr_phys_port_id.attr, |
db24a904 | 536 | &dev_attr_phys_port_name.attr, |
aecbe01e | 537 | &dev_attr_phys_switch_id.attr, |
d746d707 | 538 | &dev_attr_proto_down.attr, |
b2d3bcfa DD |
539 | &dev_attr_carrier_up_count.attr, |
540 | &dev_attr_carrier_down_count.attr, | |
6be8aeef | 541 | NULL, |
1da177e4 | 542 | }; |
6be8aeef | 543 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
544 | |
545 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
546 | static ssize_t netstat_show(const struct device *d, |
547 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
548 | unsigned long offset) |
549 | { | |
43cb76d9 | 550 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
551 | ssize_t ret = -EINVAL; |
552 | ||
be1f3c2c | 553 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
6648c65e | 554 | offset % sizeof(u64) != 0); |
1da177e4 LT |
555 | |
556 | read_lock(&dev_base_lock); | |
96e74088 | 557 | if (dev_isalive(dev)) { |
28172739 ED |
558 | struct rtnl_link_stats64 temp; |
559 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
560 | ||
6648c65e | 561 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *)stats) + offset)); |
96e74088 | 562 | } |
1da177e4 LT |
563 | read_unlock(&dev_base_lock); |
564 | return ret; | |
565 | } | |
566 | ||
567 | /* generate a read-only statistics attribute */ | |
568 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 569 | static ssize_t name##_show(struct device *d, \ |
6648c65e | 570 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 571 | { \ |
43cb76d9 | 572 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 573 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 574 | } \ |
6be8aeef | 575 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
576 | |
577 | NETSTAT_ENTRY(rx_packets); | |
578 | NETSTAT_ENTRY(tx_packets); | |
579 | NETSTAT_ENTRY(rx_bytes); | |
580 | NETSTAT_ENTRY(tx_bytes); | |
581 | NETSTAT_ENTRY(rx_errors); | |
582 | NETSTAT_ENTRY(tx_errors); | |
583 | NETSTAT_ENTRY(rx_dropped); | |
584 | NETSTAT_ENTRY(tx_dropped); | |
585 | NETSTAT_ENTRY(multicast); | |
586 | NETSTAT_ENTRY(collisions); | |
587 | NETSTAT_ENTRY(rx_length_errors); | |
588 | NETSTAT_ENTRY(rx_over_errors); | |
589 | NETSTAT_ENTRY(rx_crc_errors); | |
590 | NETSTAT_ENTRY(rx_frame_errors); | |
591 | NETSTAT_ENTRY(rx_fifo_errors); | |
592 | NETSTAT_ENTRY(rx_missed_errors); | |
593 | NETSTAT_ENTRY(tx_aborted_errors); | |
594 | NETSTAT_ENTRY(tx_carrier_errors); | |
595 | NETSTAT_ENTRY(tx_fifo_errors); | |
596 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
597 | NETSTAT_ENTRY(tx_window_errors); | |
598 | NETSTAT_ENTRY(rx_compressed); | |
599 | NETSTAT_ENTRY(tx_compressed); | |
6e7333d3 | 600 | NETSTAT_ENTRY(rx_nohandler); |
1da177e4 | 601 | |
ec6cc599 | 602 | static struct attribute *netstat_attrs[] __ro_after_init = { |
43cb76d9 GKH |
603 | &dev_attr_rx_packets.attr, |
604 | &dev_attr_tx_packets.attr, | |
605 | &dev_attr_rx_bytes.attr, | |
606 | &dev_attr_tx_bytes.attr, | |
607 | &dev_attr_rx_errors.attr, | |
608 | &dev_attr_tx_errors.attr, | |
609 | &dev_attr_rx_dropped.attr, | |
610 | &dev_attr_tx_dropped.attr, | |
611 | &dev_attr_multicast.attr, | |
612 | &dev_attr_collisions.attr, | |
613 | &dev_attr_rx_length_errors.attr, | |
614 | &dev_attr_rx_over_errors.attr, | |
615 | &dev_attr_rx_crc_errors.attr, | |
616 | &dev_attr_rx_frame_errors.attr, | |
617 | &dev_attr_rx_fifo_errors.attr, | |
618 | &dev_attr_rx_missed_errors.attr, | |
619 | &dev_attr_tx_aborted_errors.attr, | |
620 | &dev_attr_tx_carrier_errors.attr, | |
621 | &dev_attr_tx_fifo_errors.attr, | |
622 | &dev_attr_tx_heartbeat_errors.attr, | |
623 | &dev_attr_tx_window_errors.attr, | |
624 | &dev_attr_rx_compressed.attr, | |
625 | &dev_attr_tx_compressed.attr, | |
6e7333d3 | 626 | &dev_attr_rx_nohandler.attr, |
1da177e4 LT |
627 | NULL |
628 | }; | |
629 | ||
38ef00cc | 630 | static const struct attribute_group netstat_group = { |
1da177e4 LT |
631 | .name = "statistics", |
632 | .attrs = netstat_attrs, | |
633 | }; | |
38c1a01c JB |
634 | |
635 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
636 | static struct attribute *wireless_attrs[] = { | |
637 | NULL | |
638 | }; | |
639 | ||
38ef00cc | 640 | static const struct attribute_group wireless_group = { |
38c1a01c JB |
641 | .name = "wireless", |
642 | .attrs = wireless_attrs, | |
643 | }; | |
644 | #endif | |
6be8aeef GKH |
645 | |
646 | #else /* CONFIG_SYSFS */ | |
647 | #define net_class_groups NULL | |
d6523ddf | 648 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 649 | |
a953be53 | 650 | #ifdef CONFIG_SYSFS |
6648c65e | 651 | #define to_rx_queue_attr(_attr) \ |
652 | container_of(_attr, struct rx_queue_attribute, attr) | |
0a9627f2 TH |
653 | |
654 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
655 | ||
656 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
657 | char *buf) | |
658 | { | |
667e427b | 659 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
660 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
661 | ||
662 | if (!attribute->show) | |
663 | return -EIO; | |
664 | ||
718ad681 | 665 | return attribute->show(queue, buf); |
0a9627f2 TH |
666 | } |
667 | ||
668 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
669 | const char *buf, size_t count) | |
670 | { | |
667e427b | 671 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
672 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
673 | ||
674 | if (!attribute->store) | |
675 | return -EIO; | |
676 | ||
718ad681 | 677 | return attribute->store(queue, buf, count); |
0a9627f2 TH |
678 | } |
679 | ||
fa50d645 | 680 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
681 | .show = rx_queue_attr_show, |
682 | .store = rx_queue_attr_store, | |
683 | }; | |
684 | ||
a953be53 | 685 | #ifdef CONFIG_RPS |
718ad681 | 686 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, char *buf) |
0a9627f2 TH |
687 | { |
688 | struct rps_map *map; | |
689 | cpumask_var_t mask; | |
f0906827 | 690 | int i, len; |
0a9627f2 TH |
691 | |
692 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
693 | return -ENOMEM; | |
694 | ||
695 | rcu_read_lock(); | |
696 | map = rcu_dereference(queue->rps_map); | |
697 | if (map) | |
698 | for (i = 0; i < map->len; i++) | |
699 | cpumask_set_cpu(map->cpus[i], mask); | |
700 | ||
f0906827 | 701 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
0a9627f2 | 702 | rcu_read_unlock(); |
0a9627f2 | 703 | free_cpumask_var(mask); |
f0906827 TH |
704 | |
705 | return len < PAGE_SIZE ? len : -EINVAL; | |
0a9627f2 TH |
706 | } |
707 | ||
f5acb907 | 708 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
718ad681 | 709 | const char *buf, size_t len) |
0a9627f2 TH |
710 | { |
711 | struct rps_map *old_map, *map; | |
712 | cpumask_var_t mask; | |
713 | int err, cpu, i; | |
da65ad1f | 714 | static DEFINE_MUTEX(rps_map_mutex); |
0a9627f2 TH |
715 | |
716 | if (!capable(CAP_NET_ADMIN)) | |
717 | return -EPERM; | |
718 | ||
719 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
720 | return -ENOMEM; | |
721 | ||
722 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
723 | if (err) { | |
724 | free_cpumask_var(mask); | |
725 | return err; | |
726 | } | |
727 | ||
95c96174 | 728 | map = kzalloc(max_t(unsigned int, |
6648c65e | 729 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
730 | GFP_KERNEL); | |
0a9627f2 TH |
731 | if (!map) { |
732 | free_cpumask_var(mask); | |
733 | return -ENOMEM; | |
734 | } | |
735 | ||
736 | i = 0; | |
737 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
738 | map->cpus[i++] = cpu; | |
739 | ||
6648c65e | 740 | if (i) { |
0a9627f2 | 741 | map->len = i; |
6648c65e | 742 | } else { |
0a9627f2 TH |
743 | kfree(map); |
744 | map = NULL; | |
745 | } | |
746 | ||
da65ad1f | 747 | mutex_lock(&rps_map_mutex); |
6e3f7faf | 748 | old_map = rcu_dereference_protected(queue->rps_map, |
da65ad1f | 749 | mutex_is_locked(&rps_map_mutex)); |
0a9627f2 | 750 | rcu_assign_pointer(queue->rps_map, map); |
0a9627f2 | 751 | |
adc9300e | 752 | if (map) |
dc05360f | 753 | static_branch_inc(&rps_needed); |
10e4ea75 | 754 | if (old_map) |
dc05360f | 755 | static_branch_dec(&rps_needed); |
10e4ea75 | 756 | |
da65ad1f | 757 | mutex_unlock(&rps_map_mutex); |
10e4ea75 TH |
758 | |
759 | if (old_map) | |
760 | kfree_rcu(old_map, rcu); | |
761 | ||
0a9627f2 TH |
762 | free_cpumask_var(mask); |
763 | return len; | |
764 | } | |
765 | ||
fec5e652 | 766 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
767 | char *buf) |
768 | { | |
769 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 770 | unsigned long val = 0; |
fec5e652 TH |
771 | |
772 | rcu_read_lock(); | |
773 | flow_table = rcu_dereference(queue->rps_flow_table); | |
774 | if (flow_table) | |
60b778ce | 775 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
776 | rcu_read_unlock(); |
777 | ||
60b778ce | 778 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
779 | } |
780 | ||
fec5e652 TH |
781 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
782 | { | |
783 | struct rps_dev_flow_table *table = container_of(rcu, | |
784 | struct rps_dev_flow_table, rcu); | |
243198d0 | 785 | vfree(table); |
fec5e652 TH |
786 | } |
787 | ||
f5acb907 | 788 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
718ad681 | 789 | const char *buf, size_t len) |
fec5e652 | 790 | { |
60b778ce | 791 | unsigned long mask, count; |
fec5e652 TH |
792 | struct rps_dev_flow_table *table, *old_table; |
793 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 794 | int rc; |
fec5e652 TH |
795 | |
796 | if (!capable(CAP_NET_ADMIN)) | |
797 | return -EPERM; | |
798 | ||
60b778ce ED |
799 | rc = kstrtoul(buf, 0, &count); |
800 | if (rc < 0) | |
801 | return rc; | |
fec5e652 TH |
802 | |
803 | if (count) { | |
60b778ce ED |
804 | mask = count - 1; |
805 | /* mask = roundup_pow_of_two(count) - 1; | |
806 | * without overflows... | |
807 | */ | |
808 | while ((mask | (mask >> 1)) != mask) | |
809 | mask |= (mask >> 1); | |
810 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 811 | * and on 32bit arches, must check |
812 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
813 | */ |
814 | #if BITS_PER_LONG > 32 | |
815 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 816 | return -EINVAL; |
60b778ce ED |
817 | #else |
818 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 819 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
820 | /* Enforce a limit to prevent overflow */ |
821 | return -EINVAL; | |
822 | } | |
60b778ce ED |
823 | #endif |
824 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
825 | if (!table) |
826 | return -ENOMEM; | |
827 | ||
60b778ce ED |
828 | table->mask = mask; |
829 | for (count = 0; count <= mask; count++) | |
830 | table->flows[count].cpu = RPS_NO_CPU; | |
6648c65e | 831 | } else { |
fec5e652 | 832 | table = NULL; |
6648c65e | 833 | } |
fec5e652 TH |
834 | |
835 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
836 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
837 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
838 | rcu_assign_pointer(queue->rps_flow_table, table); |
839 | spin_unlock(&rps_dev_flow_lock); | |
840 | ||
841 | if (old_table) | |
842 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
843 | ||
844 | return len; | |
845 | } | |
846 | ||
667e427b | 847 | static struct rx_queue_attribute rps_cpus_attribute __ro_after_init |
d6444062 | 848 | = __ATTR(rps_cpus, 0644, show_rps_map, store_rps_map); |
0a9627f2 | 849 | |
667e427b | 850 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute __ro_after_init |
d6444062 | 851 | = __ATTR(rps_flow_cnt, 0644, |
667e427b | 852 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); |
a953be53 | 853 | #endif /* CONFIG_RPS */ |
fec5e652 | 854 | |
667e427b | 855 | static struct attribute *rx_queue_default_attrs[] __ro_after_init = { |
a953be53 | 856 | #ifdef CONFIG_RPS |
0a9627f2 | 857 | &rps_cpus_attribute.attr, |
fec5e652 | 858 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 859 | #endif |
0a9627f2 TH |
860 | NULL |
861 | }; | |
be0d6926 | 862 | ATTRIBUTE_GROUPS(rx_queue_default); |
0a9627f2 TH |
863 | |
864 | static void rx_queue_release(struct kobject *kobj) | |
865 | { | |
866 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 867 | #ifdef CONFIG_RPS |
6e3f7faf ED |
868 | struct rps_map *map; |
869 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 870 | |
33d480ce | 871 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
872 | if (map) { |
873 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 874 | kfree_rcu(map, rcu); |
9ea19481 | 875 | } |
6e3f7faf | 876 | |
33d480ce | 877 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
878 | if (flow_table) { |
879 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 880 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 881 | } |
a953be53 | 882 | #endif |
0a9627f2 | 883 | |
9ea19481 | 884 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 885 | dev_put(queue->dev); |
0a9627f2 TH |
886 | } |
887 | ||
82ef3d5d WC |
888 | static const void *rx_queue_namespace(struct kobject *kobj) |
889 | { | |
890 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
891 | struct device *dev = &queue->dev->dev; | |
892 | const void *ns = NULL; | |
893 | ||
894 | if (dev->class && dev->class->ns_type) | |
895 | ns = dev->class->namespace(dev); | |
896 | ||
897 | return ns; | |
898 | } | |
899 | ||
b0e37c0d DT |
900 | static void rx_queue_get_ownership(struct kobject *kobj, |
901 | kuid_t *uid, kgid_t *gid) | |
902 | { | |
903 | const struct net *net = rx_queue_namespace(kobj); | |
904 | ||
905 | net_ns_get_ownership(net, uid, gid); | |
906 | } | |
907 | ||
667e427b | 908 | static struct kobj_type rx_queue_ktype __ro_after_init = { |
0a9627f2 TH |
909 | .sysfs_ops = &rx_queue_sysfs_ops, |
910 | .release = rx_queue_release, | |
be0d6926 | 911 | .default_groups = rx_queue_default_groups, |
b0e37c0d DT |
912 | .namespace = rx_queue_namespace, |
913 | .get_ownership = rx_queue_get_ownership, | |
0a9627f2 TH |
914 | }; |
915 | ||
6b53dafe | 916 | static int rx_queue_add_kobject(struct net_device *dev, int index) |
0a9627f2 | 917 | { |
6b53dafe | 918 | struct netdev_rx_queue *queue = dev->_rx + index; |
0a9627f2 TH |
919 | struct kobject *kobj = &queue->kobj; |
920 | int error = 0; | |
921 | ||
6b53dafe | 922 | kobj->kset = dev->queues_kset; |
0a9627f2 | 923 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, |
6648c65e | 924 | "rx-%u", index); |
a953be53 | 925 | if (error) |
b8eb7183 | 926 | goto err; |
a953be53 | 927 | |
a3e23f71 Y |
928 | dev_hold(queue->dev); |
929 | ||
6b53dafe WC |
930 | if (dev->sysfs_rx_queue_group) { |
931 | error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); | |
b8eb7183 JH |
932 | if (error) |
933 | goto err; | |
0a9627f2 TH |
934 | } |
935 | ||
936 | kobject_uevent(kobj, KOBJ_ADD); | |
937 | ||
938 | return error; | |
b8eb7183 JH |
939 | |
940 | err: | |
941 | kobject_put(kobj); | |
942 | return error; | |
0a9627f2 | 943 | } |
80dd6eac | 944 | #endif /* CONFIG_SYSFS */ |
0a9627f2 | 945 | |
62fe0b40 | 946 | int |
6b53dafe | 947 | net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
0a9627f2 | 948 | { |
a953be53 | 949 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
950 | int i; |
951 | int error = 0; | |
952 | ||
a953be53 | 953 | #ifndef CONFIG_RPS |
6b53dafe | 954 | if (!dev->sysfs_rx_queue_group) |
a953be53 MD |
955 | return 0; |
956 | #endif | |
62fe0b40 | 957 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 958 | error = rx_queue_add_kobject(dev, i); |
62fe0b40 BH |
959 | if (error) { |
960 | new_num = old_num; | |
0a9627f2 | 961 | break; |
62fe0b40 | 962 | } |
0a9627f2 TH |
963 | } |
964 | ||
a953be53 | 965 | while (--i >= new_num) { |
002d8a1a AV |
966 | struct kobject *kobj = &dev->_rx[i].kobj; |
967 | ||
273c28bc | 968 | if (!refcount_read(&dev_net(dev)->count)) |
002d8a1a | 969 | kobj->uevent_suppress = 1; |
6b53dafe | 970 | if (dev->sysfs_rx_queue_group) |
002d8a1a AV |
971 | sysfs_remove_group(kobj, dev->sysfs_rx_queue_group); |
972 | kobject_put(kobj); | |
a953be53 | 973 | } |
0a9627f2 TH |
974 | |
975 | return error; | |
bf264145 TH |
976 | #else |
977 | return 0; | |
978 | #endif | |
0a9627f2 TH |
979 | } |
980 | ||
ccf5ff69 | 981 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
982 | /* |
983 | * netdev_queue sysfs structures and functions. | |
984 | */ | |
985 | struct netdev_queue_attribute { | |
986 | struct attribute attr; | |
718ad681 | 987 | ssize_t (*show)(struct netdev_queue *queue, char *buf); |
1d24eb48 | 988 | ssize_t (*store)(struct netdev_queue *queue, |
718ad681 | 989 | const char *buf, size_t len); |
1d24eb48 | 990 | }; |
6648c65e | 991 | #define to_netdev_queue_attr(_attr) \ |
992 | container_of(_attr, struct netdev_queue_attribute, attr) | |
1d24eb48 TH |
993 | |
994 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
995 | ||
996 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
997 | struct attribute *attr, char *buf) | |
998 | { | |
667e427b | 999 | const struct netdev_queue_attribute *attribute |
1000 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1001 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1002 | ||
1003 | if (!attribute->show) | |
1004 | return -EIO; | |
1005 | ||
718ad681 | 1006 | return attribute->show(queue, buf); |
1d24eb48 TH |
1007 | } |
1008 | ||
1009 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
1010 | struct attribute *attr, | |
1011 | const char *buf, size_t count) | |
1012 | { | |
667e427b | 1013 | const struct netdev_queue_attribute *attribute |
1014 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1015 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1016 | ||
1017 | if (!attribute->store) | |
1018 | return -EIO; | |
1019 | ||
718ad681 | 1020 | return attribute->store(queue, buf, count); |
1d24eb48 TH |
1021 | } |
1022 | ||
1023 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
1024 | .show = netdev_queue_attr_show, | |
1025 | .store = netdev_queue_attr_store, | |
1026 | }; | |
1027 | ||
2b9c7581 | 1028 | static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf) |
ccf5ff69 | 1029 | { |
1030 | unsigned long trans_timeout; | |
1031 | ||
1032 | spin_lock_irq(&queue->_xmit_lock); | |
1033 | trans_timeout = queue->trans_timeout; | |
1034 | spin_unlock_irq(&queue->_xmit_lock); | |
1035 | ||
1036 | return sprintf(buf, "%lu", trans_timeout); | |
1037 | } | |
1038 | ||
c4047f53 | 1039 | static unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
822b3b2e JF |
1040 | { |
1041 | struct net_device *dev = queue->dev; | |
c4047f53 | 1042 | unsigned int i; |
822b3b2e | 1043 | |
c4047f53 | 1044 | i = queue - dev->_tx; |
822b3b2e JF |
1045 | BUG_ON(i >= dev->num_tx_queues); |
1046 | ||
1047 | return i; | |
1048 | } | |
1049 | ||
2b9c7581 | 1050 | static ssize_t traffic_class_show(struct netdev_queue *queue, |
8d059b0f AD |
1051 | char *buf) |
1052 | { | |
1053 | struct net_device *dev = queue->dev; | |
d7be9775 AD |
1054 | int index; |
1055 | int tc; | |
8d059b0f | 1056 | |
d7be9775 AD |
1057 | if (!netif_is_multiqueue(dev)) |
1058 | return -ENOENT; | |
1059 | ||
1060 | index = get_netdev_queue_index(queue); | |
ffcfe25b AD |
1061 | |
1062 | /* If queue belongs to subordinate dev use its TC mapping */ | |
1063 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1064 | ||
d7be9775 | 1065 | tc = netdev_txq_to_tc(dev, index); |
8d059b0f AD |
1066 | if (tc < 0) |
1067 | return -EINVAL; | |
1068 | ||
ffcfe25b AD |
1069 | /* We can report the traffic class one of two ways: |
1070 | * Subordinate device traffic classes are reported with the traffic | |
1071 | * class first, and then the subordinate class so for example TC0 on | |
1072 | * subordinate device 2 will be reported as "0-2". If the queue | |
1073 | * belongs to the root device it will be reported with just the | |
1074 | * traffic class, so just "0" for TC 0 for example. | |
1075 | */ | |
1076 | return dev->num_tc < 0 ? sprintf(buf, "%u%d\n", tc, dev->num_tc) : | |
1077 | sprintf(buf, "%u\n", tc); | |
8d059b0f AD |
1078 | } |
1079 | ||
1080 | #ifdef CONFIG_XPS | |
2b9c7581 | 1081 | static ssize_t tx_maxrate_show(struct netdev_queue *queue, |
822b3b2e JF |
1082 | char *buf) |
1083 | { | |
1084 | return sprintf(buf, "%lu\n", queue->tx_maxrate); | |
1085 | } | |
1086 | ||
2b9c7581 | 1087 | static ssize_t tx_maxrate_store(struct netdev_queue *queue, |
1088 | const char *buf, size_t len) | |
822b3b2e JF |
1089 | { |
1090 | struct net_device *dev = queue->dev; | |
1091 | int err, index = get_netdev_queue_index(queue); | |
1092 | u32 rate = 0; | |
1093 | ||
3033fced TH |
1094 | if (!capable(CAP_NET_ADMIN)) |
1095 | return -EPERM; | |
1096 | ||
822b3b2e JF |
1097 | err = kstrtou32(buf, 10, &rate); |
1098 | if (err < 0) | |
1099 | return err; | |
1100 | ||
1101 | if (!rtnl_trylock()) | |
1102 | return restart_syscall(); | |
1103 | ||
1104 | err = -EOPNOTSUPP; | |
1105 | if (dev->netdev_ops->ndo_set_tx_maxrate) | |
1106 | err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); | |
1107 | ||
1108 | rtnl_unlock(); | |
1109 | if (!err) { | |
1110 | queue->tx_maxrate = rate; | |
1111 | return len; | |
1112 | } | |
1113 | return err; | |
1114 | } | |
1115 | ||
2b9c7581 | 1116 | static struct netdev_queue_attribute queue_tx_maxrate __ro_after_init |
1117 | = __ATTR_RW(tx_maxrate); | |
822b3b2e JF |
1118 | #endif |
1119 | ||
2b9c7581 | 1120 | static struct netdev_queue_attribute queue_trans_timeout __ro_after_init |
1121 | = __ATTR_RO(tx_timeout); | |
ccf5ff69 | 1122 | |
2b9c7581 | 1123 | static struct netdev_queue_attribute queue_traffic_class __ro_after_init |
1124 | = __ATTR_RO(traffic_class); | |
8d059b0f | 1125 | |
114cf580 TH |
1126 | #ifdef CONFIG_BQL |
1127 | /* | |
1128 | * Byte queue limits sysfs structures and functions. | |
1129 | */ | |
1130 | static ssize_t bql_show(char *buf, unsigned int value) | |
1131 | { | |
1132 | return sprintf(buf, "%u\n", value); | |
1133 | } | |
1134 | ||
1135 | static ssize_t bql_set(const char *buf, const size_t count, | |
1136 | unsigned int *pvalue) | |
1137 | { | |
1138 | unsigned int value; | |
1139 | int err; | |
1140 | ||
6648c65e | 1141 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) { |
114cf580 | 1142 | value = DQL_MAX_LIMIT; |
6648c65e | 1143 | } else { |
114cf580 TH |
1144 | err = kstrtouint(buf, 10, &value); |
1145 | if (err < 0) | |
1146 | return err; | |
1147 | if (value > DQL_MAX_LIMIT) | |
1148 | return -EINVAL; | |
1149 | } | |
1150 | ||
1151 | *pvalue = value; | |
1152 | ||
1153 | return count; | |
1154 | } | |
1155 | ||
1156 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1157 | char *buf) |
1158 | { | |
1159 | struct dql *dql = &queue->dql; | |
1160 | ||
1161 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
1162 | } | |
1163 | ||
1164 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1165 | const char *buf, size_t len) |
1166 | { | |
1167 | struct dql *dql = &queue->dql; | |
95c96174 | 1168 | unsigned int value; |
114cf580 TH |
1169 | int err; |
1170 | ||
1171 | err = kstrtouint(buf, 10, &value); | |
1172 | if (err < 0) | |
1173 | return err; | |
1174 | ||
1175 | dql->slack_hold_time = msecs_to_jiffies(value); | |
1176 | ||
1177 | return len; | |
1178 | } | |
1179 | ||
170c658a | 1180 | static struct netdev_queue_attribute bql_hold_time_attribute __ro_after_init |
d6444062 | 1181 | = __ATTR(hold_time, 0644, |
170c658a | 1182 | bql_show_hold_time, bql_set_hold_time); |
114cf580 TH |
1183 | |
1184 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
114cf580 TH |
1185 | char *buf) |
1186 | { | |
1187 | struct dql *dql = &queue->dql; | |
1188 | ||
1189 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
1190 | } | |
1191 | ||
170c658a | 1192 | static struct netdev_queue_attribute bql_inflight_attribute __ro_after_init = |
d6444062 | 1193 | __ATTR(inflight, 0444, bql_show_inflight, NULL); |
114cf580 TH |
1194 | |
1195 | #define BQL_ATTR(NAME, FIELD) \ | |
1196 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1197 | char *buf) \ |
1198 | { \ | |
1199 | return bql_show(buf, queue->dql.FIELD); \ | |
1200 | } \ | |
1201 | \ | |
1202 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1203 | const char *buf, size_t len) \ |
1204 | { \ | |
1205 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
1206 | } \ | |
1207 | \ | |
170c658a | 1208 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute __ro_after_init \ |
d6444062 | 1209 | = __ATTR(NAME, 0644, \ |
170c658a | 1210 | bql_show_ ## NAME, bql_set_ ## NAME) |
114cf580 | 1211 | |
170c658a | 1212 | BQL_ATTR(limit, limit); |
1213 | BQL_ATTR(limit_max, max_limit); | |
1214 | BQL_ATTR(limit_min, min_limit); | |
114cf580 | 1215 | |
170c658a | 1216 | static struct attribute *dql_attrs[] __ro_after_init = { |
114cf580 TH |
1217 | &bql_limit_attribute.attr, |
1218 | &bql_limit_max_attribute.attr, | |
1219 | &bql_limit_min_attribute.attr, | |
1220 | &bql_hold_time_attribute.attr, | |
1221 | &bql_inflight_attribute.attr, | |
1222 | NULL | |
1223 | }; | |
1224 | ||
38ef00cc | 1225 | static const struct attribute_group dql_group = { |
114cf580 TH |
1226 | .name = "byte_queue_limits", |
1227 | .attrs = dql_attrs, | |
1228 | }; | |
1229 | #endif /* CONFIG_BQL */ | |
1230 | ||
ccf5ff69 | 1231 | #ifdef CONFIG_XPS |
2b9c7581 | 1232 | static ssize_t xps_cpus_show(struct netdev_queue *queue, |
1233 | char *buf) | |
1d24eb48 TH |
1234 | { |
1235 | struct net_device *dev = queue->dev; | |
184c449f | 1236 | int cpu, len, num_tc = 1, tc = 0; |
1d24eb48 TH |
1237 | struct xps_dev_maps *dev_maps; |
1238 | cpumask_var_t mask; | |
1239 | unsigned long index; | |
1d24eb48 | 1240 | |
d7be9775 AD |
1241 | if (!netif_is_multiqueue(dev)) |
1242 | return -ENOENT; | |
1243 | ||
1d24eb48 TH |
1244 | index = get_netdev_queue_index(queue); |
1245 | ||
184c449f | 1246 | if (dev->num_tc) { |
ffcfe25b | 1247 | /* Do not allow XPS on subordinate device directly */ |
184c449f | 1248 | num_tc = dev->num_tc; |
ffcfe25b AD |
1249 | if (num_tc < 0) |
1250 | return -EINVAL; | |
1251 | ||
1252 | /* If queue belongs to subordinate dev use its map */ | |
1253 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1254 | ||
184c449f AD |
1255 | tc = netdev_txq_to_tc(dev, index); |
1256 | if (tc < 0) | |
1257 | return -EINVAL; | |
1258 | } | |
1259 | ||
664088f8 AD |
1260 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) |
1261 | return -ENOMEM; | |
1262 | ||
1d24eb48 | 1263 | rcu_read_lock(); |
80d19669 | 1264 | dev_maps = rcu_dereference(dev->xps_cpus_map); |
1d24eb48 | 1265 | if (dev_maps) { |
184c449f AD |
1266 | for_each_possible_cpu(cpu) { |
1267 | int i, tci = cpu * num_tc + tc; | |
1268 | struct xps_map *map; | |
1269 | ||
80d19669 | 1270 | map = rcu_dereference(dev_maps->attr_map[tci]); |
184c449f AD |
1271 | if (!map) |
1272 | continue; | |
1273 | ||
1274 | for (i = map->len; i--;) { | |
1275 | if (map->queues[i] == index) { | |
1276 | cpumask_set_cpu(cpu, mask); | |
1277 | break; | |
1d24eb48 TH |
1278 | } |
1279 | } | |
1280 | } | |
1281 | } | |
1282 | rcu_read_unlock(); | |
1283 | ||
f0906827 | 1284 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
1d24eb48 | 1285 | free_cpumask_var(mask); |
f0906827 | 1286 | return len < PAGE_SIZE ? len : -EINVAL; |
1d24eb48 TH |
1287 | } |
1288 | ||
2b9c7581 | 1289 | static ssize_t xps_cpus_store(struct netdev_queue *queue, |
1290 | const char *buf, size_t len) | |
1d24eb48 TH |
1291 | { |
1292 | struct net_device *dev = queue->dev; | |
1d24eb48 | 1293 | unsigned long index; |
537c00de AD |
1294 | cpumask_var_t mask; |
1295 | int err; | |
1d24eb48 | 1296 | |
d7be9775 AD |
1297 | if (!netif_is_multiqueue(dev)) |
1298 | return -ENOENT; | |
1299 | ||
1d24eb48 TH |
1300 | if (!capable(CAP_NET_ADMIN)) |
1301 | return -EPERM; | |
1302 | ||
1303 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1304 | return -ENOMEM; | |
1305 | ||
1306 | index = get_netdev_queue_index(queue); | |
1307 | ||
1308 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1309 | if (err) { | |
1310 | free_cpumask_var(mask); | |
1311 | return err; | |
1312 | } | |
1313 | ||
537c00de | 1314 | err = netif_set_xps_queue(dev, mask, index); |
1d24eb48 TH |
1315 | |
1316 | free_cpumask_var(mask); | |
1d24eb48 | 1317 | |
537c00de | 1318 | return err ? : len; |
1d24eb48 TH |
1319 | } |
1320 | ||
2b9c7581 | 1321 | static struct netdev_queue_attribute xps_cpus_attribute __ro_after_init |
1322 | = __ATTR_RW(xps_cpus); | |
8af2c06f AN |
1323 | |
1324 | static ssize_t xps_rxqs_show(struct netdev_queue *queue, char *buf) | |
1325 | { | |
1326 | struct net_device *dev = queue->dev; | |
1327 | struct xps_dev_maps *dev_maps; | |
1328 | unsigned long *mask, index; | |
1329 | int j, len, num_tc = 1, tc = 0; | |
1330 | ||
1331 | index = get_netdev_queue_index(queue); | |
1332 | ||
1333 | if (dev->num_tc) { | |
1334 | num_tc = dev->num_tc; | |
1335 | tc = netdev_txq_to_tc(dev, index); | |
1336 | if (tc < 0) | |
1337 | return -EINVAL; | |
1338 | } | |
29ca1c5a | 1339 | mask = bitmap_zalloc(dev->num_rx_queues, GFP_KERNEL); |
8af2c06f AN |
1340 | if (!mask) |
1341 | return -ENOMEM; | |
1342 | ||
1343 | rcu_read_lock(); | |
1344 | dev_maps = rcu_dereference(dev->xps_rxqs_map); | |
1345 | if (!dev_maps) | |
1346 | goto out_no_maps; | |
1347 | ||
1348 | for (j = -1; j = netif_attrmask_next(j, NULL, dev->num_rx_queues), | |
1349 | j < dev->num_rx_queues;) { | |
1350 | int i, tci = j * num_tc + tc; | |
1351 | struct xps_map *map; | |
1352 | ||
1353 | map = rcu_dereference(dev_maps->attr_map[tci]); | |
1354 | if (!map) | |
1355 | continue; | |
1356 | ||
1357 | for (i = map->len; i--;) { | |
1358 | if (map->queues[i] == index) { | |
1359 | set_bit(j, mask); | |
1360 | break; | |
1361 | } | |
1362 | } | |
1363 | } | |
1364 | out_no_maps: | |
1365 | rcu_read_unlock(); | |
1366 | ||
1367 | len = bitmap_print_to_pagebuf(false, buf, mask, dev->num_rx_queues); | |
29ca1c5a | 1368 | bitmap_free(mask); |
8af2c06f AN |
1369 | |
1370 | return len < PAGE_SIZE ? len : -EINVAL; | |
1371 | } | |
1372 | ||
1373 | static ssize_t xps_rxqs_store(struct netdev_queue *queue, const char *buf, | |
1374 | size_t len) | |
1375 | { | |
1376 | struct net_device *dev = queue->dev; | |
1377 | struct net *net = dev_net(dev); | |
1378 | unsigned long *mask, index; | |
1379 | int err; | |
1380 | ||
1381 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1382 | return -EPERM; | |
1383 | ||
29ca1c5a | 1384 | mask = bitmap_zalloc(dev->num_rx_queues, GFP_KERNEL); |
8af2c06f AN |
1385 | if (!mask) |
1386 | return -ENOMEM; | |
1387 | ||
1388 | index = get_netdev_queue_index(queue); | |
1389 | ||
1390 | err = bitmap_parse(buf, len, mask, dev->num_rx_queues); | |
1391 | if (err) { | |
29ca1c5a | 1392 | bitmap_free(mask); |
8af2c06f AN |
1393 | return err; |
1394 | } | |
1395 | ||
4d99f660 | 1396 | cpus_read_lock(); |
8af2c06f | 1397 | err = __netif_set_xps_queue(dev, mask, index, true); |
4d99f660 AV |
1398 | cpus_read_unlock(); |
1399 | ||
29ca1c5a | 1400 | bitmap_free(mask); |
8af2c06f AN |
1401 | return err ? : len; |
1402 | } | |
1403 | ||
1404 | static struct netdev_queue_attribute xps_rxqs_attribute __ro_after_init | |
1405 | = __ATTR_RW(xps_rxqs); | |
ccf5ff69 | 1406 | #endif /* CONFIG_XPS */ |
1d24eb48 | 1407 | |
2b9c7581 | 1408 | static struct attribute *netdev_queue_default_attrs[] __ro_after_init = { |
ccf5ff69 | 1409 | &queue_trans_timeout.attr, |
8d059b0f | 1410 | &queue_traffic_class.attr, |
ccf5ff69 | 1411 | #ifdef CONFIG_XPS |
1d24eb48 | 1412 | &xps_cpus_attribute.attr, |
8af2c06f | 1413 | &xps_rxqs_attribute.attr, |
822b3b2e | 1414 | &queue_tx_maxrate.attr, |
ccf5ff69 | 1415 | #endif |
1d24eb48 TH |
1416 | NULL |
1417 | }; | |
be0d6926 | 1418 | ATTRIBUTE_GROUPS(netdev_queue_default); |
1d24eb48 TH |
1419 | |
1420 | static void netdev_queue_release(struct kobject *kobj) | |
1421 | { | |
1422 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1423 | |
1d24eb48 TH |
1424 | memset(kobj, 0, sizeof(*kobj)); |
1425 | dev_put(queue->dev); | |
1426 | } | |
1427 | ||
82ef3d5d WC |
1428 | static const void *netdev_queue_namespace(struct kobject *kobj) |
1429 | { | |
1430 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1431 | struct device *dev = &queue->dev->dev; | |
1432 | const void *ns = NULL; | |
1433 | ||
1434 | if (dev->class && dev->class->ns_type) | |
1435 | ns = dev->class->namespace(dev); | |
1436 | ||
1437 | return ns; | |
1438 | } | |
1439 | ||
b0e37c0d DT |
1440 | static void netdev_queue_get_ownership(struct kobject *kobj, |
1441 | kuid_t *uid, kgid_t *gid) | |
1442 | { | |
1443 | const struct net *net = netdev_queue_namespace(kobj); | |
1444 | ||
1445 | net_ns_get_ownership(net, uid, gid); | |
1446 | } | |
1447 | ||
2b9c7581 | 1448 | static struct kobj_type netdev_queue_ktype __ro_after_init = { |
1d24eb48 TH |
1449 | .sysfs_ops = &netdev_queue_sysfs_ops, |
1450 | .release = netdev_queue_release, | |
be0d6926 | 1451 | .default_groups = netdev_queue_default_groups, |
82ef3d5d | 1452 | .namespace = netdev_queue_namespace, |
b0e37c0d | 1453 | .get_ownership = netdev_queue_get_ownership, |
1d24eb48 TH |
1454 | }; |
1455 | ||
6b53dafe | 1456 | static int netdev_queue_add_kobject(struct net_device *dev, int index) |
1d24eb48 | 1457 | { |
6b53dafe | 1458 | struct netdev_queue *queue = dev->_tx + index; |
1d24eb48 TH |
1459 | struct kobject *kobj = &queue->kobj; |
1460 | int error = 0; | |
1461 | ||
6b53dafe | 1462 | kobj->kset = dev->queues_kset; |
1d24eb48 | 1463 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, |
6648c65e | 1464 | "tx-%u", index); |
114cf580 | 1465 | if (error) |
b8eb7183 | 1466 | goto err; |
114cf580 | 1467 | |
a3e23f71 Y |
1468 | dev_hold(queue->dev); |
1469 | ||
114cf580 TH |
1470 | #ifdef CONFIG_BQL |
1471 | error = sysfs_create_group(kobj, &dql_group); | |
b8eb7183 JH |
1472 | if (error) |
1473 | goto err; | |
114cf580 | 1474 | #endif |
1d24eb48 TH |
1475 | |
1476 | kobject_uevent(kobj, KOBJ_ADD); | |
48a322b6 | 1477 | return 0; |
1d24eb48 | 1478 | |
b8eb7183 JH |
1479 | err: |
1480 | kobject_put(kobj); | |
1481 | return error; | |
1d24eb48 | 1482 | } |
ccf5ff69 | 1483 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1484 | |
1485 | int | |
6b53dafe | 1486 | netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
1d24eb48 | 1487 | { |
ccf5ff69 | 1488 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1489 | int i; |
1490 | int error = 0; | |
1491 | ||
1492 | for (i = old_num; i < new_num; i++) { | |
6b53dafe | 1493 | error = netdev_queue_add_kobject(dev, i); |
1d24eb48 TH |
1494 | if (error) { |
1495 | new_num = old_num; | |
1496 | break; | |
1497 | } | |
1498 | } | |
1499 | ||
114cf580 | 1500 | while (--i >= new_num) { |
6b53dafe | 1501 | struct netdev_queue *queue = dev->_tx + i; |
114cf580 | 1502 | |
273c28bc | 1503 | if (!refcount_read(&dev_net(dev)->count)) |
002d8a1a | 1504 | queue->kobj.uevent_suppress = 1; |
114cf580 TH |
1505 | #ifdef CONFIG_BQL |
1506 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1507 | #endif | |
1508 | kobject_put(&queue->kobj); | |
1509 | } | |
1d24eb48 TH |
1510 | |
1511 | return error; | |
bf264145 TH |
1512 | #else |
1513 | return 0; | |
ccf5ff69 | 1514 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1515 | } |
1516 | ||
6b53dafe | 1517 | static int register_queue_kobjects(struct net_device *dev) |
1d24eb48 | 1518 | { |
bf264145 | 1519 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1520 | |
ccf5ff69 | 1521 | #ifdef CONFIG_SYSFS |
6b53dafe | 1522 | dev->queues_kset = kset_create_and_add("queues", |
6648c65e | 1523 | NULL, &dev->dev.kobj); |
6b53dafe | 1524 | if (!dev->queues_kset) |
62fe0b40 | 1525 | return -ENOMEM; |
6b53dafe | 1526 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1527 | #endif |
6b53dafe | 1528 | real_tx = dev->real_num_tx_queues; |
1d24eb48 | 1529 | |
6b53dafe | 1530 | error = net_rx_queue_update_kobjects(dev, 0, real_rx); |
1d24eb48 TH |
1531 | if (error) |
1532 | goto error; | |
bf264145 | 1533 | rxq = real_rx; |
1d24eb48 | 1534 | |
6b53dafe | 1535 | error = netdev_queue_update_kobjects(dev, 0, real_tx); |
1d24eb48 TH |
1536 | if (error) |
1537 | goto error; | |
bf264145 | 1538 | txq = real_tx; |
1d24eb48 TH |
1539 | |
1540 | return 0; | |
1541 | ||
1542 | error: | |
6b53dafe WC |
1543 | netdev_queue_update_kobjects(dev, txq, 0); |
1544 | net_rx_queue_update_kobjects(dev, rxq, 0); | |
895a5e96 Y |
1545 | #ifdef CONFIG_SYSFS |
1546 | kset_unregister(dev->queues_kset); | |
1547 | #endif | |
1d24eb48 | 1548 | return error; |
62fe0b40 | 1549 | } |
0a9627f2 | 1550 | |
6b53dafe | 1551 | static void remove_queue_kobjects(struct net_device *dev) |
62fe0b40 | 1552 | { |
bf264145 TH |
1553 | int real_rx = 0, real_tx = 0; |
1554 | ||
a953be53 | 1555 | #ifdef CONFIG_SYSFS |
6b53dafe | 1556 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1557 | #endif |
6b53dafe | 1558 | real_tx = dev->real_num_tx_queues; |
bf264145 | 1559 | |
6b53dafe WC |
1560 | net_rx_queue_update_kobjects(dev, real_rx, 0); |
1561 | netdev_queue_update_kobjects(dev, real_tx, 0); | |
ccf5ff69 | 1562 | #ifdef CONFIG_SYSFS |
6b53dafe | 1563 | kset_unregister(dev->queues_kset); |
bf264145 | 1564 | #endif |
0a9627f2 | 1565 | } |
608b4b95 | 1566 | |
7dc5dbc8 EB |
1567 | static bool net_current_may_mount(void) |
1568 | { | |
1569 | struct net *net = current->nsproxy->net_ns; | |
1570 | ||
1571 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1572 | } | |
1573 | ||
a685e089 | 1574 | static void *net_grab_current_ns(void) |
608b4b95 | 1575 | { |
a685e089 AV |
1576 | struct net *ns = current->nsproxy->net_ns; |
1577 | #ifdef CONFIG_NET_NS | |
1578 | if (ns) | |
c122e14d | 1579 | refcount_inc(&ns->passive); |
a685e089 AV |
1580 | #endif |
1581 | return ns; | |
608b4b95 EB |
1582 | } |
1583 | ||
1584 | static const void *net_initial_ns(void) | |
1585 | { | |
1586 | return &init_net; | |
1587 | } | |
1588 | ||
1589 | static const void *net_netlink_ns(struct sock *sk) | |
1590 | { | |
1591 | return sock_net(sk); | |
1592 | } | |
1593 | ||
737aec57 | 1594 | const struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1595 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1596 | .current_may_mount = net_current_may_mount, |
a685e089 | 1597 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1598 | .netlink_ns = net_netlink_ns, |
1599 | .initial_ns = net_initial_ns, | |
a685e089 | 1600 | .drop_ns = net_drop_ns, |
608b4b95 | 1601 | }; |
04600794 | 1602 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1603 | |
7eff2e7a | 1604 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1605 | { |
43cb76d9 | 1606 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1607 | int retval; |
1da177e4 | 1608 | |
312c004d | 1609 | /* pass interface to uevent. */ |
7eff2e7a | 1610 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1611 | if (retval) |
1612 | goto exit; | |
ca2f37db JT |
1613 | |
1614 | /* pass ifindex to uevent. | |
1615 | * ifindex is useful as it won't change (interface name may change) | |
6648c65e | 1616 | * and is what RtNetlink uses natively. |
1617 | */ | |
7eff2e7a | 1618 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1619 | |
bf62456e | 1620 | exit: |
bf62456e | 1621 | return retval; |
1da177e4 | 1622 | } |
1da177e4 LT |
1623 | |
1624 | /* | |
4ec93edb | 1625 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1626 | * Called when last reference to device kobject is gone. |
1da177e4 | 1627 | */ |
43cb76d9 | 1628 | static void netdev_release(struct device *d) |
1da177e4 | 1629 | { |
43cb76d9 | 1630 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1631 | |
1632 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1633 | ||
6c557001 FW |
1634 | /* no need to wait for rcu grace period: |
1635 | * device is dead and about to be freed. | |
1636 | */ | |
1637 | kfree(rcu_access_pointer(dev->ifalias)); | |
74d332c1 | 1638 | netdev_freemem(dev); |
1da177e4 LT |
1639 | } |
1640 | ||
608b4b95 EB |
1641 | static const void *net_namespace(struct device *d) |
1642 | { | |
5c29482d GT |
1643 | struct net_device *dev = to_net_dev(d); |
1644 | ||
608b4b95 EB |
1645 | return dev_net(dev); |
1646 | } | |
1647 | ||
b0e37c0d DT |
1648 | static void net_get_ownership(struct device *d, kuid_t *uid, kgid_t *gid) |
1649 | { | |
1650 | struct net_device *dev = to_net_dev(d); | |
1651 | const struct net *net = dev_net(dev); | |
1652 | ||
1653 | net_ns_get_ownership(net, uid, gid); | |
1654 | } | |
1655 | ||
e6d473e6 | 1656 | static struct class net_class __ro_after_init = { |
1da177e4 | 1657 | .name = "net", |
43cb76d9 | 1658 | .dev_release = netdev_release, |
6be8aeef | 1659 | .dev_groups = net_class_groups, |
43cb76d9 | 1660 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1661 | .ns_type = &net_ns_type_operations, |
1662 | .namespace = net_namespace, | |
b0e37c0d | 1663 | .get_ownership = net_get_ownership, |
1da177e4 LT |
1664 | }; |
1665 | ||
aa836df9 FF |
1666 | #ifdef CONFIG_OF_NET |
1667 | static int of_dev_node_match(struct device *dev, const void *data) | |
1668 | { | |
1669 | int ret = 0; | |
1670 | ||
1671 | if (dev->parent) | |
1672 | ret = dev->parent->of_node == data; | |
1673 | ||
1674 | return ret == 0 ? dev->of_node == data : ret; | |
1675 | } | |
1676 | ||
9861f720 RK |
1677 | /* |
1678 | * of_find_net_device_by_node - lookup the net device for the device node | |
1679 | * @np: OF device node | |
1680 | * | |
1681 | * Looks up the net_device structure corresponding with the device node. | |
1682 | * If successful, returns a pointer to the net_device with the embedded | |
1683 | * struct device refcount incremented by one, or NULL on failure. The | |
1684 | * refcount must be dropped when done with the net_device. | |
1685 | */ | |
aa836df9 FF |
1686 | struct net_device *of_find_net_device_by_node(struct device_node *np) |
1687 | { | |
1688 | struct device *dev; | |
1689 | ||
1690 | dev = class_find_device(&net_class, NULL, np, of_dev_node_match); | |
1691 | if (!dev) | |
1692 | return NULL; | |
1693 | ||
1694 | return to_net_dev(dev); | |
1695 | } | |
1696 | EXPORT_SYMBOL(of_find_net_device_by_node); | |
1697 | #endif | |
1698 | ||
9093bbb2 SH |
1699 | /* Delete sysfs entries but hold kobject reference until after all |
1700 | * netdev references are gone. | |
1701 | */ | |
6b53dafe | 1702 | void netdev_unregister_kobject(struct net_device *ndev) |
1da177e4 | 1703 | { |
6648c65e | 1704 | struct device *dev = &ndev->dev; |
9093bbb2 | 1705 | |
273c28bc | 1706 | if (!refcount_read(&dev_net(ndev)->count)) |
002d8a1a AV |
1707 | dev_set_uevent_suppress(dev, 1); |
1708 | ||
9093bbb2 | 1709 | kobject_get(&dev->kobj); |
3891845e | 1710 | |
6b53dafe | 1711 | remove_queue_kobjects(ndev); |
0a9627f2 | 1712 | |
9802c8e2 ML |
1713 | pm_runtime_set_memalloc_noio(dev, false); |
1714 | ||
9093bbb2 | 1715 | device_del(dev); |
1da177e4 LT |
1716 | } |
1717 | ||
1718 | /* Create sysfs entries for network device. */ | |
6b53dafe | 1719 | int netdev_register_kobject(struct net_device *ndev) |
1da177e4 | 1720 | { |
6648c65e | 1721 | struct device *dev = &ndev->dev; |
6b53dafe | 1722 | const struct attribute_group **groups = ndev->sysfs_groups; |
0a9627f2 | 1723 | int error = 0; |
1da177e4 | 1724 | |
a1b3f594 | 1725 | device_initialize(dev); |
43cb76d9 | 1726 | dev->class = &net_class; |
6b53dafe | 1727 | dev->platform_data = ndev; |
43cb76d9 | 1728 | dev->groups = groups; |
1da177e4 | 1729 | |
6b53dafe | 1730 | dev_set_name(dev, "%s", ndev->name); |
1da177e4 | 1731 | |
8b41d188 | 1732 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1733 | /* Allow for a device specific group */ |
1734 | if (*groups) | |
1735 | groups++; | |
1da177e4 | 1736 | |
0c509a6c | 1737 | *groups++ = &netstat_group; |
38c1a01c JB |
1738 | |
1739 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
6b53dafe | 1740 | if (ndev->ieee80211_ptr) |
38c1a01c JB |
1741 | *groups++ = &wireless_group; |
1742 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) | |
6b53dafe | 1743 | else if (ndev->wireless_handlers) |
38c1a01c JB |
1744 | *groups++ = &wireless_group; |
1745 | #endif | |
1746 | #endif | |
8b41d188 | 1747 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1748 | |
0a9627f2 TH |
1749 | error = device_add(dev); |
1750 | if (error) | |
8ed633b9 | 1751 | return error; |
0a9627f2 | 1752 | |
6b53dafe | 1753 | error = register_queue_kobjects(ndev); |
8ed633b9 WH |
1754 | if (error) { |
1755 | device_del(dev); | |
1756 | return error; | |
1757 | } | |
0a9627f2 | 1758 | |
9802c8e2 ML |
1759 | pm_runtime_set_memalloc_noio(dev, true); |
1760 | ||
0a9627f2 | 1761 | return error; |
1da177e4 LT |
1762 | } |
1763 | ||
b793dc5c | 1764 | int netdev_class_create_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1765 | const void *ns) |
b8a9787e | 1766 | { |
58292cbe | 1767 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1768 | } |
58292cbe | 1769 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 1770 | |
b793dc5c | 1771 | void netdev_class_remove_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1772 | const void *ns) |
b8a9787e | 1773 | { |
58292cbe | 1774 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1775 | } |
58292cbe | 1776 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 1777 | |
a48d4bb0 | 1778 | int __init netdev_kobject_init(void) |
1da177e4 | 1779 | { |
608b4b95 | 1780 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1781 | return class_register(&net_class); |
1782 | } |