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| author | Jakub Kicinski <kuba@kernel.org> | 2021-12-07 03:06:03 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-12-07 03:06:04 +0300 |
| commit | 4c375272fb0ba19288e323928d1f6937e368851f (patch) | |
| tree | 54ecbe3957c2a4ea0edf2134b2a7272546fdd9ce /include/net/ip_tunnels.h | |
| parent | ce83278f313ce65a9bbd780a3e07fa3f62d82525 (diff) | |
| parent | 5fa5ae605821e0e10ee489d9a6e331fd287ccc57 (diff) | |
| download | linux-4c375272fb0ba19288e323928d1f6937e368851f.tar.xz | |
Merge branch 'net-add-preliminary-netdev-refcount-tracking'
Eric Dumazet says:
====================
net: add preliminary netdev refcount tracking
Two first patches add a generic infrastructure, that will be used
to get tracking of refcount increments/decrements.
The general idea is to be able to precisely pair each decrement with
a corresponding prior increment. Both share a cookie, basically
a pointer to private data storing stack traces.
The third patch adds dev_hold_track() and dev_put_track() helpers
(CONFIG_NET_DEV_REFCNT_TRACKER)
Then a series of 20 patches converts some dev_hold()/dev_put()
pairs to new hepers : dev_hold_track() and dev_put_track().
Hopefully this will be used by developpers and syzbot to
root cause bugs that cause netdevice dismantles freezes.
With CONFIG_PCPU_DEV_REFCNT=n option, we were able to detect
some class of bugs, but too late (when too many dev_put()
were happening).
Another series will be sent after this one is merged.
v3: moved NET_DEV_REFCNT_TRACKER to net/Kconfig.debug
added "depends on DEBUG_KERNEL && STACKTRACE_SUPPORT"
to hopefully get rid of kbuild reports for ARCH=nios2
Reworded patch 3 changelog.
Added missing htmldocs (Jakub)
v2: added four additional patches,
added netdev_tracker_alloc() and netdev_tracker_free()
addressed build error (kernel bots),
use GFP_ATOMIC in test_ref_tracker_timer_func()
====================
Link: https://lore.kernel.org/r/20211205042217.982127-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net/ip_tunnels.h')
| -rw-r--r-- | include/net/ip_tunnels.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h index bc3b13ec93c9..0219fe907b26 100644 --- a/include/net/ip_tunnels.h +++ b/include/net/ip_tunnels.h @@ -104,7 +104,10 @@ struct metadata_dst; struct ip_tunnel { struct ip_tunnel __rcu *next; struct hlist_node hash_node; + struct net_device *dev; + netdevice_tracker dev_tracker; + struct net *net; /* netns for packet i/o */ unsigned long err_time; /* Time when the last ICMP error |