linux/drivers/scsi/libfc
Yi Zou 3b64b18811 [SCSI] libfc: fix lun reset failure bugs in fc_fcp_resp handling of FCP_RSP_INFO
In LUN RESET testing involving NetApp targets, it is observed that LUN
RESET is failing. The fc_fcp_resp() is not completing the completion
for the LUN RESET task since fc_fcp_resp assumes that the FCP_RSP_INFO
is 8 bytes with the 4 byte reserved field, where in case of NetApp targets
the FCP_RSP to LUN RESET only has 4 bytes of FCP_RSP_INFO. This leads
fc_fcp_resp to error out w/o completing the task completion, eventually
causing LUN RESET to be escalated to host reset, which is not very nice.

Per FCP-3 r04, clause 9.5.15 and Table 23, the FCP_RSP_INFO field can be either
4 bytes or 8 bytes, with the last 4 bytes as "Reserved (if any)". Therefore it
is valid to have 4 bytes FCP_RSP_INFO like some of the NetApp targets behave.
Fixing this by validating the FCP_RSP_INFO against both the two spec allowed
length.

Reported-by: Frank Zhang <frank_1.zhang@intel.com>
Signed-off-by: Yi Zou <yi.zou@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-10-07 11:52:55 +01:00
..
fc_disc.c [SCSI] libfc: Handle discovery failure during ctlr link down 2012-02-19 09:27:26 -06:00
fc_elsct.c [SCSI] libfc: Make the libfc Common Transport(CT) code generic 2012-02-19 08:08:58 -06:00
fc_exch.c [SCSI] libfc: add exch timer debug info 2012-07-20 08:58:55 +01:00
fc_fcp.c [SCSI] libfc: fix lun reset failure bugs in fc_fcp_resp handling of FCP_RSP_INFO 2012-10-07 11:52:55 +01:00
fc_frame.c [SCSI] libfc, fcoe, bnx2fc: cleanup fcoe_dev_stats 2012-07-20 08:31:47 +01:00
fc_libfc.c scsi: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:19 +08:00
fc_libfc.h scsi: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:19 +08:00
fc_lport.c [SCSI] libfc: fix retries with FDMI lport states 2012-07-20 08:58:56 +01:00
fc_npiv.c scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required 2011-10-31 19:31:23 -04:00
fc_rport.c [SCSI] libfc: Declare local functions static 2012-01-16 12:45:48 +04:00
Makefile [SCSI] libfc: add some generic NPIV support routines to libfc 2009-12-04 12:00:56 -06:00