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![Nikolay Aleksandrov](/assets/img/avatar_default.png)
commitc62987bbd8
("bridge: push bridge setting ageing_time down to switchdev") introduced a timer race condition because the gc_timer can get rearmed after it's supposedly stopped and flushed in br_dev_delete() leading to a use of freed memory. So take rtnl to sync with bridge destruction when setting ageing_timer. Here's the trace reproduced with these two commands running in parallel: while :; do echo 10000 > /sys/class/net/br0/bridge/ageing_timer; done; while :; do brctl addbr br0; ip l set br0 up; ip l set br0 down; brctl delbr br0; done; [ 300.000029] BUG: unable to handle kernel paging request at ffffffff811c59d3 [ 300.000263] IP: [<ffffffff810f168e>] __internal_add_timer+0x2e/0xd0 [ 300.000422] PGD 1a0f067 PUD 1a10063 PMD 10001e1 [ 300.000639] Oops: 0003 [#1] SMP [ 300.000793] Modules linked in: bridge stp llc nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel ppdev aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd snd_hda_codec_generic qxl drm_kms_helper psmouse pcspkr ttm snd_hda_intel 9pnet_virtio evdev serio_raw joydev snd_hda_codec 9pnet virtio_balloon drm snd_hwdep virtio_console snd_hda_core pvpanic snd_pcm i2c_piix4 snd_timer acpi_cpufreq parport_pc snd parport soundcore button processor i2c_core ipv6 autofs4 hid_generic usbhid hid ext4 crc16 mbcache jbd2 sg sr_mod cdrom ata_generic virtio_blk virtio_net e1000 ehci_pci uhci_hcd ehci_hcd usbcore usb_common floppy ata_piix libata virtio_pci virtio_ring virtio scsi_mod [ 300.004008] CPU: 1 PID: 1169 Comm: bash Not tainted 4.3.0-rc3+ #46 [ 300.004008] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 300.004008] task: ffff880035be2200 ti: ffff88003795c000 task.ti: ffff88003795c000 [ 300.004008] RIP: 0010:[<ffffffff810f168e>] [<ffffffff810f168e>] __internal_add_timer+0x2e/0xd0 [ 300.004008] RSP: 0018:ffff88003fd03e78 EFLAGS: 00010046 [ 300.004008] RAX: ffff88003fd0ef60 RBX: 840fc78949c08548 RCX: 00000001ffffffff [ 300.004008] RDX: 0000000000000000 RSI: ffffffff811c59d3 RDI: ffff88003fd0df00 [ 300.004008] RBP: ffff88003fd03e78 R08: 00000000ffffffff R09: 0000000000000000 [ 300.004008] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88003fd0df00 [ 300.004008] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff816032e0 [ 300.004008] FS: 00007fcbdd609700(0000) GS:ffff88003fd00000(0000) knlGS:0000000000000000 [ 300.004008] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 300.004008] CR2: ffffffff811c59d3 CR3: 0000000037879000 CR4: 00000000000406e0 [ 300.004008] Stack: [ 300.004008] ffff88003fd03ea8 ffffffff810f1775 ffff88003c8cb958 ffff88003fd0df00 [ 300.004008] 0000000000000000 0000000000000001 ffff88003fd03f18 ffffffff810f28c4 [ 300.004008] ffff88003fd0eb68 ffff88003fd0e968 ffff88003fd0e768 ffff88003fd0df68 [ 300.004008] Call Trace: [ 300.004008] <IRQ> [ 300.004008] [<ffffffff810f1775>] cascade+0x45/0x70 [ 300.004008] [<ffffffff810f28c4>] run_timer_softirq+0x2f4/0x340 [ 300.004008] [<ffffffff8107e380>] __do_softirq+0xd0/0x440 [ 300.004008] [<ffffffff8107e8a3>] irq_exit+0xb3/0xc0 [ 300.004008] [<ffffffff815c2032>] smp_apic_timer_interrupt+0x42/0x50 [ 300.004008] [<ffffffff815bfe37>] apic_timer_interrupt+0x87/0x90 [ 300.004008] <EOI> [ 300.004008] [<ffffffff811fb80c>] ? create_object+0x13c/0x2e0 [ 300.004008] [<ffffffff8109b23e>] ? __kernel_text_address+0x4e/0x70 [ 300.004008] [<ffffffff8109b23e>] ? __kernel_text_address+0x4e/0x70 [ 300.004008] [<ffffffff8101e17f>] print_context_stack+0x7f/0xf0 [ 300.004008] [<ffffffff8101d55b>] dump_trace+0x11b/0x300 [ 300.004008] [<ffffffff8102970b>] save_stack_trace+0x2b/0x50 [ 300.004008] [<ffffffff811fb80c>] create_object+0x13c/0x2e0 [ 300.004008] [<ffffffff815b2e8e>] kmemleak_alloc+0x4e/0xb0 [ 300.004008] [<ffffffff811e475d>] kmem_cache_alloc_trace+0x18d/0x2f0 [ 300.004008] [<ffffffff8128b139>] kernfs_fop_open+0xc9/0x380 [ 300.004008] [<ffffffff8120214f>] do_dentry_open+0x1ff/0x2f0 [ 300.004008] [<ffffffff8128b070>] ? kernfs_fop_release+0x70/0x70 [ 300.004008] [<ffffffff812034f9>] vfs_open+0x59/0x60 [ 300.004008] [<ffffffff812130de>] path_openat+0x1ce/0x1260 [ 300.004008] [<ffffffff812154ae>] do_filp_open+0x7e/0xe0 [ 300.004008] [<ffffffff812251ff>] ? __alloc_fd+0xaf/0x180 [ 300.004008] [<ffffffff8120387b>] do_sys_open+0x12b/0x210 [ 300.004008] [<ffffffff8120397e>] SyS_open+0x1e/0x20 [ 300.004008] [<ffffffff815bf0b6>] entry_SYSCALL_64_fastpath+0x16/0x7a [ 300.004008] Code: 66 90 48 8b 46 10 48 8b 4f 40 55 48 89 c2 48 89 e5 48 29 ca 48 81 fa ff 00 00 00 77 20 0f b6 c0 48 8d 44 c7 68 48 8b 10 48 85 d2 <48> 89 16 74 04 48 89 72 08 48 89 30 48 89 46 08 5d c3 48 81 fa [ 300.004008] RIP [<ffffffff810f168e>] __internal_add_timer+0x2e/0xd0 [ 300.004008] RSP <ffff88003fd03e78> [ 300.004008] CR2: ffffffff811c59d3 Fixes:c62987bbd8
("bridge: push bridge setting ageing_time down to switchdev") Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
896 lines
24 KiB
C
896 lines
24 KiB
C
/*
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* Sysfs attributes of bridge
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* Linux ethernet bridge
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*
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* Authors:
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* Stephen Hemminger <shemminger@osdl.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/capability.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_bridge.h>
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#include <linux/rtnetlink.h>
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#include <linux/spinlock.h>
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#include <linux/times.h>
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#include "br_private.h"
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#define to_dev(obj) container_of(obj, struct device, kobj)
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#define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
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/*
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* Common code for storing bridge parameters.
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*/
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static ssize_t store_bridge_parm(struct device *d,
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const char *buf, size_t len,
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int (*set)(struct net_bridge *, unsigned long))
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{
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struct net_bridge *br = to_bridge(d);
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char *endp;
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unsigned long val;
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int err;
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if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
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return -EPERM;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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return -EINVAL;
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err = (*set)(br, val);
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return err ? err : len;
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}
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static ssize_t forward_delay_show(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
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}
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static ssize_t forward_delay_store(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, br_set_forward_delay);
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}
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static DEVICE_ATTR_RW(forward_delay);
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static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%lu\n",
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jiffies_to_clock_t(to_bridge(d)->hello_time));
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}
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static ssize_t hello_time_store(struct device *d,
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struct device_attribute *attr, const char *buf,
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size_t len)
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{
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return store_bridge_parm(d, buf, len, br_set_hello_time);
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}
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static DEVICE_ATTR_RW(hello_time);
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static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%lu\n",
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jiffies_to_clock_t(to_bridge(d)->max_age));
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}
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static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, br_set_max_age);
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}
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static DEVICE_ATTR_RW(max_age);
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static ssize_t ageing_time_show(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
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}
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static int set_ageing_time(struct net_bridge *br, unsigned long val)
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{
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int ret;
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if (!rtnl_trylock())
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return restart_syscall();
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ret = br_set_ageing_time(br, val);
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rtnl_unlock();
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return ret;
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}
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static ssize_t ageing_time_store(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, set_ageing_time);
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}
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static DEVICE_ATTR_RW(ageing_time);
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static ssize_t stp_state_show(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n", br->stp_enabled);
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}
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static ssize_t stp_state_store(struct device *d,
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struct device_attribute *attr, const char *buf,
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size_t len)
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{
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struct net_bridge *br = to_bridge(d);
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char *endp;
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unsigned long val;
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if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
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return -EPERM;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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return -EINVAL;
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if (!rtnl_trylock())
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return restart_syscall();
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br_stp_set_enabled(br, val);
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rtnl_unlock();
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return len;
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}
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static DEVICE_ATTR_RW(stp_state);
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static ssize_t group_fwd_mask_show(struct device *d,
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struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%#x\n", br->group_fwd_mask);
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}
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static ssize_t group_fwd_mask_store(struct device *d,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct net_bridge *br = to_bridge(d);
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char *endp;
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unsigned long val;
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if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
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return -EPERM;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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return -EINVAL;
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if (val & BR_GROUPFWD_RESTRICTED)
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return -EINVAL;
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br->group_fwd_mask = val;
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return len;
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}
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static DEVICE_ATTR_RW(group_fwd_mask);
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static ssize_t priority_show(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n",
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(br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
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}
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static int set_priority(struct net_bridge *br, unsigned long val)
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{
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br_stp_set_bridge_priority(br, (u16) val);
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return 0;
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}
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static ssize_t priority_store(struct device *d, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, set_priority);
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}
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static DEVICE_ATTR_RW(priority);
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static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
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}
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static DEVICE_ATTR_RO(root_id);
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static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
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}
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static DEVICE_ATTR_RO(bridge_id);
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static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%d\n", to_bridge(d)->root_port);
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}
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static DEVICE_ATTR_RO(root_port);
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static ssize_t root_path_cost_show(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
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}
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static DEVICE_ATTR_RO(root_path_cost);
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static ssize_t topology_change_show(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
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}
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static DEVICE_ATTR_RO(topology_change);
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static ssize_t topology_change_detected_show(struct device *d,
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struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n", br->topology_change_detected);
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}
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static DEVICE_ATTR_RO(topology_change_detected);
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static ssize_t hello_timer_show(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
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}
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static DEVICE_ATTR_RO(hello_timer);
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static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
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}
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static DEVICE_ATTR_RO(tcn_timer);
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static ssize_t topology_change_timer_show(struct device *d,
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struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
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}
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static DEVICE_ATTR_RO(topology_change_timer);
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static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
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}
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static DEVICE_ATTR_RO(gc_timer);
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static ssize_t group_addr_show(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
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br->group_addr[0], br->group_addr[1],
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br->group_addr[2], br->group_addr[3],
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br->group_addr[4], br->group_addr[5]);
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}
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static ssize_t group_addr_store(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct net_bridge *br = to_bridge(d);
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u8 new_addr[6];
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int i;
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if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
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return -EPERM;
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if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
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&new_addr[0], &new_addr[1], &new_addr[2],
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&new_addr[3], &new_addr[4], &new_addr[5]) != 6)
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return -EINVAL;
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if (!is_link_local_ether_addr(new_addr))
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return -EINVAL;
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if (new_addr[5] == 1 || /* 802.3x Pause address */
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new_addr[5] == 2 || /* 802.3ad Slow protocols */
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new_addr[5] == 3) /* 802.1X PAE address */
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return -EINVAL;
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if (!rtnl_trylock())
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return restart_syscall();
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spin_lock_bh(&br->lock);
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for (i = 0; i < 6; i++)
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br->group_addr[i] = new_addr[i];
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spin_unlock_bh(&br->lock);
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br->group_addr_set = true;
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br_recalculate_fwd_mask(br);
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rtnl_unlock();
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return len;
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}
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static DEVICE_ATTR_RW(group_addr);
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static ssize_t flush_store(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct net_bridge *br = to_bridge(d);
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if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
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return -EPERM;
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br_fdb_flush(br);
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return len;
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}
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static DEVICE_ATTR_WO(flush);
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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static ssize_t multicast_router_show(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n", br->multicast_router);
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}
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static ssize_t multicast_router_store(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, br_multicast_set_router);
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}
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static DEVICE_ATTR_RW(multicast_router);
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static ssize_t multicast_snooping_show(struct device *d,
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struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n", !br->multicast_disabled);
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}
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static ssize_t multicast_snooping_store(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, br_multicast_toggle);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_snooping);
|
|
|
|
static ssize_t multicast_query_use_ifaddr_show(struct device *d,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%d\n", br->multicast_query_use_ifaddr);
|
|
}
|
|
|
|
static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->multicast_query_use_ifaddr = !!val;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t
|
|
multicast_query_use_ifaddr_store(struct device *d,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
|
|
|
|
static ssize_t multicast_querier_show(struct device *d,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%d\n", br->multicast_querier);
|
|
}
|
|
|
|
static ssize_t multicast_querier_store(struct device *d,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, br_multicast_set_querier);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_querier);
|
|
|
|
static ssize_t hash_elasticity_show(struct device *d,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%u\n", br->hash_elasticity);
|
|
}
|
|
|
|
static int set_elasticity(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->hash_elasticity = val;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t hash_elasticity_store(struct device *d,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_elasticity);
|
|
}
|
|
static DEVICE_ATTR_RW(hash_elasticity);
|
|
|
|
static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%u\n", br->hash_max);
|
|
}
|
|
|
|
static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
|
|
}
|
|
static DEVICE_ATTR_RW(hash_max);
|
|
|
|
static ssize_t multicast_last_member_count_show(struct device *d,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%u\n", br->multicast_last_member_count);
|
|
}
|
|
|
|
static int set_last_member_count(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->multicast_last_member_count = val;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t multicast_last_member_count_store(struct device *d,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_last_member_count);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_last_member_count);
|
|
|
|
static ssize_t multicast_startup_query_count_show(
|
|
struct device *d, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%u\n", br->multicast_startup_query_count);
|
|
}
|
|
|
|
static int set_startup_query_count(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->multicast_startup_query_count = val;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t multicast_startup_query_count_store(
|
|
struct device *d, struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_startup_query_count);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_startup_query_count);
|
|
|
|
static ssize_t multicast_last_member_interval_show(
|
|
struct device *d, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%lu\n",
|
|
jiffies_to_clock_t(br->multicast_last_member_interval));
|
|
}
|
|
|
|
static int set_last_member_interval(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->multicast_last_member_interval = clock_t_to_jiffies(val);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t multicast_last_member_interval_store(
|
|
struct device *d, struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_last_member_interval);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_last_member_interval);
|
|
|
|
static ssize_t multicast_membership_interval_show(
|
|
struct device *d, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%lu\n",
|
|
jiffies_to_clock_t(br->multicast_membership_interval));
|
|
}
|
|
|
|
static int set_membership_interval(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->multicast_membership_interval = clock_t_to_jiffies(val);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t multicast_membership_interval_store(
|
|
struct device *d, struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_membership_interval);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_membership_interval);
|
|
|
|
static ssize_t multicast_querier_interval_show(struct device *d,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%lu\n",
|
|
jiffies_to_clock_t(br->multicast_querier_interval));
|
|
}
|
|
|
|
static int set_querier_interval(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->multicast_querier_interval = clock_t_to_jiffies(val);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t multicast_querier_interval_store(struct device *d,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_querier_interval);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_querier_interval);
|
|
|
|
static ssize_t multicast_query_interval_show(struct device *d,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%lu\n",
|
|
jiffies_to_clock_t(br->multicast_query_interval));
|
|
}
|
|
|
|
static int set_query_interval(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->multicast_query_interval = clock_t_to_jiffies(val);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t multicast_query_interval_store(struct device *d,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_query_interval);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_query_interval);
|
|
|
|
static ssize_t multicast_query_response_interval_show(
|
|
struct device *d, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(
|
|
buf, "%lu\n",
|
|
jiffies_to_clock_t(br->multicast_query_response_interval));
|
|
}
|
|
|
|
static int set_query_response_interval(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->multicast_query_response_interval = clock_t_to_jiffies(val);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t multicast_query_response_interval_store(
|
|
struct device *d, struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_query_response_interval);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_query_response_interval);
|
|
|
|
static ssize_t multicast_startup_query_interval_show(
|
|
struct device *d, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(
|
|
buf, "%lu\n",
|
|
jiffies_to_clock_t(br->multicast_startup_query_interval));
|
|
}
|
|
|
|
static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->multicast_startup_query_interval = clock_t_to_jiffies(val);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t multicast_startup_query_interval_store(
|
|
struct device *d, struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_startup_query_interval);
|
|
}
|
|
static DEVICE_ATTR_RW(multicast_startup_query_interval);
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
|
|
static ssize_t nf_call_iptables_show(
|
|
struct device *d, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%u\n", br->nf_call_iptables);
|
|
}
|
|
|
|
static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->nf_call_iptables = val ? true : false;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t nf_call_iptables_store(
|
|
struct device *d, struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_nf_call_iptables);
|
|
}
|
|
static DEVICE_ATTR_RW(nf_call_iptables);
|
|
|
|
static ssize_t nf_call_ip6tables_show(
|
|
struct device *d, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%u\n", br->nf_call_ip6tables);
|
|
}
|
|
|
|
static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->nf_call_ip6tables = val ? true : false;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t nf_call_ip6tables_store(
|
|
struct device *d, struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
|
|
}
|
|
static DEVICE_ATTR_RW(nf_call_ip6tables);
|
|
|
|
static ssize_t nf_call_arptables_show(
|
|
struct device *d, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%u\n", br->nf_call_arptables);
|
|
}
|
|
|
|
static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->nf_call_arptables = val ? true : false;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t nf_call_arptables_store(
|
|
struct device *d, struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, set_nf_call_arptables);
|
|
}
|
|
static DEVICE_ATTR_RW(nf_call_arptables);
|
|
#endif
|
|
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
|
|
static ssize_t vlan_filtering_show(struct device *d,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%d\n", br->vlan_enabled);
|
|
}
|
|
|
|
static ssize_t vlan_filtering_store(struct device *d,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
|
|
}
|
|
static DEVICE_ATTR_RW(vlan_filtering);
|
|
|
|
static ssize_t vlan_protocol_show(struct device *d,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
|
|
}
|
|
|
|
static ssize_t vlan_protocol_store(struct device *d,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, br_vlan_set_proto);
|
|
}
|
|
static DEVICE_ATTR_RW(vlan_protocol);
|
|
|
|
static ssize_t default_pvid_show(struct device *d,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(d);
|
|
return sprintf(buf, "%d\n", br->default_pvid);
|
|
}
|
|
|
|
static ssize_t default_pvid_store(struct device *d,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
|
|
}
|
|
static DEVICE_ATTR_RW(default_pvid);
|
|
#endif
|
|
|
|
static struct attribute *bridge_attrs[] = {
|
|
&dev_attr_forward_delay.attr,
|
|
&dev_attr_hello_time.attr,
|
|
&dev_attr_max_age.attr,
|
|
&dev_attr_ageing_time.attr,
|
|
&dev_attr_stp_state.attr,
|
|
&dev_attr_group_fwd_mask.attr,
|
|
&dev_attr_priority.attr,
|
|
&dev_attr_bridge_id.attr,
|
|
&dev_attr_root_id.attr,
|
|
&dev_attr_root_path_cost.attr,
|
|
&dev_attr_root_port.attr,
|
|
&dev_attr_topology_change.attr,
|
|
&dev_attr_topology_change_detected.attr,
|
|
&dev_attr_hello_timer.attr,
|
|
&dev_attr_tcn_timer.attr,
|
|
&dev_attr_topology_change_timer.attr,
|
|
&dev_attr_gc_timer.attr,
|
|
&dev_attr_group_addr.attr,
|
|
&dev_attr_flush.attr,
|
|
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
|
|
&dev_attr_multicast_router.attr,
|
|
&dev_attr_multicast_snooping.attr,
|
|
&dev_attr_multicast_querier.attr,
|
|
&dev_attr_multicast_query_use_ifaddr.attr,
|
|
&dev_attr_hash_elasticity.attr,
|
|
&dev_attr_hash_max.attr,
|
|
&dev_attr_multicast_last_member_count.attr,
|
|
&dev_attr_multicast_startup_query_count.attr,
|
|
&dev_attr_multicast_last_member_interval.attr,
|
|
&dev_attr_multicast_membership_interval.attr,
|
|
&dev_attr_multicast_querier_interval.attr,
|
|
&dev_attr_multicast_query_interval.attr,
|
|
&dev_attr_multicast_query_response_interval.attr,
|
|
&dev_attr_multicast_startup_query_interval.attr,
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
|
|
&dev_attr_nf_call_iptables.attr,
|
|
&dev_attr_nf_call_ip6tables.attr,
|
|
&dev_attr_nf_call_arptables.attr,
|
|
#endif
|
|
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
|
|
&dev_attr_vlan_filtering.attr,
|
|
&dev_attr_vlan_protocol.attr,
|
|
&dev_attr_default_pvid.attr,
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group bridge_group = {
|
|
.name = SYSFS_BRIDGE_ATTR,
|
|
.attrs = bridge_attrs,
|
|
};
|
|
|
|
/*
|
|
* Export the forwarding information table as a binary file
|
|
* The records are struct __fdb_entry.
|
|
*
|
|
* Returns the number of bytes read.
|
|
*/
|
|
static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
|
|
struct bin_attribute *bin_attr,
|
|
char *buf, loff_t off, size_t count)
|
|
{
|
|
struct device *dev = to_dev(kobj);
|
|
struct net_bridge *br = to_bridge(dev);
|
|
int n;
|
|
|
|
/* must read whole records */
|
|
if (off % sizeof(struct __fdb_entry) != 0)
|
|
return -EINVAL;
|
|
|
|
n = br_fdb_fillbuf(br, buf,
|
|
count / sizeof(struct __fdb_entry),
|
|
off / sizeof(struct __fdb_entry));
|
|
|
|
if (n > 0)
|
|
n *= sizeof(struct __fdb_entry);
|
|
|
|
return n;
|
|
}
|
|
|
|
static struct bin_attribute bridge_forward = {
|
|
.attr = { .name = SYSFS_BRIDGE_FDB,
|
|
.mode = S_IRUGO, },
|
|
.read = brforward_read,
|
|
};
|
|
|
|
/*
|
|
* Add entries in sysfs onto the existing network class device
|
|
* for the bridge.
|
|
* Adds a attribute group "bridge" containing tuning parameters.
|
|
* Binary attribute containing the forward table
|
|
* Sub directory to hold links to interfaces.
|
|
*
|
|
* Note: the ifobj exists only to be a subdirectory
|
|
* to hold links. The ifobj exists in same data structure
|
|
* as it's parent the bridge so reference counting works.
|
|
*/
|
|
int br_sysfs_addbr(struct net_device *dev)
|
|
{
|
|
struct kobject *brobj = &dev->dev.kobj;
|
|
struct net_bridge *br = netdev_priv(dev);
|
|
int err;
|
|
|
|
err = sysfs_create_group(brobj, &bridge_group);
|
|
if (err) {
|
|
pr_info("%s: can't create group %s/%s\n",
|
|
__func__, dev->name, bridge_group.name);
|
|
goto out1;
|
|
}
|
|
|
|
err = sysfs_create_bin_file(brobj, &bridge_forward);
|
|
if (err) {
|
|
pr_info("%s: can't create attribute file %s/%s\n",
|
|
__func__, dev->name, bridge_forward.attr.name);
|
|
goto out2;
|
|
}
|
|
|
|
br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
|
|
if (!br->ifobj) {
|
|
pr_info("%s: can't add kobject (directory) %s/%s\n",
|
|
__func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
|
|
goto out3;
|
|
}
|
|
return 0;
|
|
out3:
|
|
sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
|
|
out2:
|
|
sysfs_remove_group(&dev->dev.kobj, &bridge_group);
|
|
out1:
|
|
return err;
|
|
|
|
}
|
|
|
|
void br_sysfs_delbr(struct net_device *dev)
|
|
{
|
|
struct kobject *kobj = &dev->dev.kobj;
|
|
struct net_bridge *br = netdev_priv(dev);
|
|
|
|
kobject_put(br->ifobj);
|
|
sysfs_remove_bin_file(kobj, &bridge_forward);
|
|
sysfs_remove_group(kobj, &bridge_group);
|
|
}
|