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path: root/drivers/scsi/fnic/fnic_trace.h
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2014-05-19fnic: fnic Control Path Trace UtilityHiral Shah
Fnic Ctlr Path Trace utility is a tracing functionality built directly into fnic driver to trace the control path frames like discovery, FLOGI request/reply, PLOGI request/reply, link event etc. It will be one trace file for all fnics. It will help us to debug and resolve the discovery and initialization related issues in more convenient way. This trace information includes time stamp, Host Number, Frame type, Frame Length and Frame. By default,64 pages are allocated but we can change the number of allocated pages by module parameter fnic_fc_trace_max_page. Each entry is of 256 byte and available entries are depends on allocated number of pages. We can turn on or off the fnic control path trace functionality by module paramter fc_trace_enable and/or reset the trace contain by module paramter fc_trace_clear. Signed-off-by: Hiral Shah <hishah@cisco.com> Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2013-10-25[SCSI] fnic: Fnic Statistics CollectionHiral Patel
This feature gathers active and cumulative per fnic stats for io, abort, terminate, reset, vlan discovery path and it also includes various important stats for debugging issues. It also provided debugfs and ioctl interface for user to retrieve these stats. It also provides functionality to reset cumulative stats through user interface. Signed-off-by: Hiral Patel <hiralpat@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-02-22[SCSI] fnic: Fnic Trace UtilityHiral Patel
Fnic Trace utility is a tracing functionality built directly into fnic driver to trace events. The benefit that trace buffer brings to fnic driver is the ability to see what it happening inside the fnic driver. It also provides the capability to trace every IO event inside fnic driver to debug panics, hangs and potentially IO corruption issues. This feature makes it easy to find problems in fnic driver and it also helps in tracking down strange bugs in a more manageable way. Trace buffer is shared across all fnic instances for this implementation. Signed-off-by: Hiral Patel <hiralpat@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>