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qeth: bridgeport support - basic control

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Introduce functions to assign roles and check state of bridgeport-capable
HiperSocket devices, and sysfs attributes providing access to these
functions from userspace. Introduce udev events emitted when the state
of a bridgeport device changes.

Signed-off-by: Eugene Crosser <[email protected]>
Signed-off-by: Frank Blaschka <[email protected]>
Reviewed-by: Ursula Braun <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eugene Crosser 2014-01-14 15:54:11 +01:00 • committed by David S. Miller
commit b4d72c08b3
9 changed files with 685 additions and 2 deletions
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21
Documentation/s390/qeth.txt Normal file
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IBM s390 QDIO Ethernet Driver
HiperSockets Bridge Port Support
Uevents
To generate the events the device must be assigned a role of either
a primary or a secondary Bridge Port. For more information, see
"z/VM Connectivity, SC24-6174".
When run on HiperSockets Bridge Capable Port hardware, and the state
of some configured Bridge Port device on the channel changes, a udev
event with ACTION=CHANGE is emitted on behalf of the corresponding
ccwgroup device. The event has the following attributes:
BRIDGEPORT=statechange - indicates that the Bridge Port device changed
its state.
ROLE={primary|secondary|none} - the role assigned to the port.
STATE={active|standby|inactive} - the newly assumed state of the port.