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02cb24e9d9
Vivien Didelot says:
====================
net: dsa: check out-of-range ageing time
The ageing time limits supported by DSA drivers vary depending on the
switch model. If a driver returns -ERANGE for out-of-range values, the
switchdev commit phase will fail with the following stacktrace:
# brctl setageing br0 4
[ 8530.082179] WARNING: CPU: 0 PID: 910 at net/switchdev/switchdev.c:291 switchdev_port_attr_set_now+0xbc/0xc0
[ 8530.090679] br0: Commit of attribute (id=5) failed.
[ 8530.094256] Modules linked in:
[ 8530.096032] CPU: 0 PID: 910 Comm: kworker/0:4 Tainted: G W 4.10.0 #361
[ 8530.102412] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
[ 8530.107571] Workqueue: events switchdev_deferred_process_work
[ 8530.112039] Backtrace:
[ 8530.113224] [<8010ca34>] (dump_backtrace) from [<8010cd3c>] (show_stack+0x20/0x24)
[ 8530.119521] r6:00000000 r5:80834da0 r4:80ca7e48 r3:8120ca3c
[ 8530.123908] [<8010cd1c>] (show_stack) from [<8037ad40>] (dump_stack+0x24/0x28)
[ 8530.129873] [<8037ad1c>] (dump_stack) from [<80118de4>] (__warn+0xf4/0x10c)
[ 8530.135545] [<80118cf0>] (__warn) from [<80118e44>] (warn_slowpath_fmt+0x48/0x50)
[ 8530.141760] r9:00000000 r8:81252bec r7:80f19d90 r6:9dc3c000 r5:80ca7e7c r4:80834de8
[ 8530.148235] [<80118e00>] (warn_slowpath_fmt) from [<80670b20>] (switchdev_port_attr_set_now+0xbc/0xc0)
[ 8530.156240] r3:9dc3c000 r2:80834de8
[ 8530.158539] r4:ffffffde
[ 8530.159788] [<80670a64>] (switchdev_port_attr_set_now) from [<80670b44>] (switchdev_port_attr_set_deferred+0x20/0x6c)
[ 8530.169118] r7:806705a8 r6:9dc3c000 r5:80f19d90 r4:80f19d80
[ 8530.173500] [<80670b24>] (switchdev_port_attr_set_deferred) from [<80670580>] (switchdev_deferred_process+0x50/0xe8)
[ 8530.182742] r6:80ca6000 r5:81252bec r4:80f19d80 r3:80670b24
[ 8530.187115] [<80670530>] (switchdev_deferred_process) from [<80670930>] (switchdev_deferred_process_work+0x1c/0x24)
[ 8530.196277] r8:00000000 r7:9ffdc100 r6:8120ad6c r5:9ddefc00 r4:81252bf4 r3:9de343c0
[ 8530.202756] [<80670914>] (switchdev_deferred_process_work) from [<8012f770>] (process_one_work+0x120/0x3b0)
[ 8530.211231] [<8012f650>] (process_one_work) from [<8012fa70>] (worker_thread+0x70/0x534)
[ 8530.218046] r10:9ddefc00 r9:8120ad6c r8:80ca6038 r7:8120ad80 r6:81211f80 r5:9ddefc18
[ 8530.224579] r4:8120ad6c
[ 8530.225830] [<8012fa00>] (worker_thread) from [<80135640>] (kthread+0x114/0x144)
[ 8530.231955] r10:9f4e9e94 r9:9de1fe58 r8:8012fa00 r7:9ddefc00 r6:9de1fdc0 r5:00000000
[ 8530.238497] r4:9de1fe40
[ 8530.239750] [<8013552c>] (kthread) from [<80108cd8>] (ret_from_fork+0x14/0x3c)
[ 8530.245679] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8013552c
[ 8530.252234] r4:9de1fdc0 r3:80ca6000
[ 8530.254512] ---[ end trace 87475cc71b80ef73 ]---
[ 8530.257852] br0: failed (err=-34) to set attribute (id=5)
This patchset fixes this by adding ageing_time_min and ageing_time_max
fields to the dsa_switch structure, which can optionally be set by a DSA
driver.
If provided, the DSA core will check for out-of-range values in the
SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME prepare phase and return -ERANGE
accordingly.
Finally set these limits in the mv88e6xxx driver.
====================
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.