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05 April 2024, 19:05:47 UTC
Revision 25cc72a33835ed8a6f53180a822cadab855852ac authored by Ido Schimmel on 01 September 2017, 08:52:31 UTC, committed by David S. Miller on 01 September 2017, 16:59:41 UTC 
mlxsw: spectrum: Forbid linking to devices that have uppers
 
The mlxsw driver relies on NETDEV_CHANGEUPPER events to configure the
device in case a port is enslaved to a master netdev such as bridge or
bond.

Since the driver ignores events unrelated to its ports and their
uppers, it's possible to engineer situations in which the device's data
path differs from the kernel's.

One example to such a situation is when a port is enslaved to a bond
that is already enslaved to a bridge. When the bond was enslaved the
driver ignored the event - as the bond wasn't one of its uppers - and
therefore a bridge port instance isn't created in the device.

Until such configurations are supported forbid them by checking that the
upper device doesn't have uppers of its own.

Fixes: 0d65fc13042f ("mlxsw: spectrum: Implement LAG port join/leave")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reported-by: Nogah Frankel <nogahf@mellanox.com>
Tested-by: Nogah Frankel <nogahf@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent f581a0d
History
Tip revision: 25cc72a33835ed8a6f53180a822cadab855852ac authored by Ido Schimmel on 01 September 2017, 08:52:31 UTC
mlxsw: spectrum: Forbid linking to devices that have uppers
Tip revision: 25cc72a
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.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 31 bytes
.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.3 KB
.mailmap -rw-r--r-- 8.1 KB
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