scsi: qedf: Honor priority from DCBX FCoE App tag

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We currently hard code the priority in the 8021q tag to 3 for FCoE
traffic.  The vast majority of the time this is fine but if the priority
is something else besides 3, any VLAN ID comparison either in the
non-offload path or offload path will fail and cause dropped frames
where none are expected.

Change the behavior so that the driver default is 3 if we do not get any
DCBX convergence.

If DCBX does converge, then set the FIP/FCoE priority in the following
manner:

 1. If the qedf_default_prio modparam is set use that
 2. If the DCBX FCoE priority is not in range (0..7) use 3
 3. Use the DCBX FCoE priority we get in the driver's DCBX handler

Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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This commit is contained in:

Chad Dupuis 2018-04-25 06:08:52 -07:00 • committed by Martin K. Petersen

parent ba17d379c2

commit 84b2ba6e42

2 changed files with 39 additions and 14 deletions

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drivers/scsi/qedf/qedf.h

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52

drivers/scsi/qedf/qedf_main.c

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