Matty,
While playing around with COMSTAR, I noticed that the logs weren't all
that useful for debugging problems. Does anyone happen to know if
there is a way to get verbose debugging data from the STMF framework?
Within STMF there is an in-kernel trace buffer called @
stmf_trace_buf, enabled by setting 'stmf_trace_on' to 1 (the default
for now).
echo '*stmf_trace_buf/s' |mdb -k > stmftrace.txt
Some of the STMF data structures are available from MDB
# mdb -k
mdb> ::dmods -l stmf
stmf
dcmd fct_find_cmds - Find all fct_i_cmd_t for a given local
port
dcmd fct_icmds - Print all cached fct_i_cmd_t on
fct_i_local_port
dcmd fct_irps - Print all fct_i_remote_port for a given
fct_i_local_port
dcmd ilport2iport - Convert stmf_i_local_port to
corresponding fct_i_local_port
dcmd stmf_find_fct_irp - Print fct remote port information based
on its wwn
dcmd stmf_find_ilport - Find local port information based on its
wwn
dcmd stmf_find_tasks - Find all pending task for a local port
or remote port
dcmd stmf_i_lu_providers - Print a list of stmf_i_lu_provider
dcmd stmf_i_port_providers - Print a list of stmf_i_port_provider
dcmd stmf_ilports - Print a list of stmf_i_local_port
dcmd stmf_ilus - Print a list of stmf_i_lu
dcmd stmf_iss - List all active sessions for a given
local port
dcmd stmf_scsi_task - List all the active STMF SCSI tasks per
worker
dcmd stmf_worker - List all the stmf_worker entries
walk stmf_scsi_task - Walk active STMF SCSI tasks per worker
walk stmf_worker - Walk STMF worker queue
Also, is there a way to view the SCSI commands sent from a given
initiator?
On Solaris:
# snoop -d <Ethernet device> -o <filename>
Analyze using the tool WireShark, available on many platforms:
http://www.wireshark.org/
- Jim
These two items would be extremely useful for isolating
problems, especially ones related to client hangs (one of my Linux
hosts periodically hangs during the device discovery process, and it
would be nice if I could see what it was doing from the target's
perspective).
Thanks for any insight,
- Ryan
--
http://prefetch.net
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