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| author | Eric Dumazet <edumazet@google.com> | 2016-03-17 17:23:36 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-18 23:14:15 -0400 |
| commit | fe30937b65354c7fec244caebbdaae68e28ca797 (patch) | |
| tree | 76597e789e2eac26153f116c8dfe991f934bc96a /include/linux/bcma/bcma_driver_chipcommon.h | |
| parent | eee577232203842b4dcadb7ab477a298479633ed (diff) | |
bonding: fix bond_get_stats()
bond_get_stats() can be called from rtnetlink (with RTNL held)
or from /proc/net/dev seq handler (with RCU held)
The logic added in commit 5f0c5f73e5ef ("bonding: make global bonding
stats more reliable") kind of assumed only one cpu could run there.
If multiple threads are reading /proc/net/dev, stats can be really
messed up after a while.
A second problem is that some fields are 32bit, so we need to properly
handle the wrap around problem.
Given that RTNL is not always held, we need to use
bond_for_each_slave_rcu().
Fixes: 5f0c5f73e5ef ("bonding: make global bonding stats more reliable")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Andy Gospodarek <gospo@cumulusnetworks.com>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/bcma/bcma_driver_chipcommon.h')
0 files changed, 0 insertions, 0 deletions