linux-toradex.git/include/scsi/libiscsi.h, branch v2.6.32.64

[SCSI] libiscsi: iscsi_session_setup to allow for private space

2009-10-02T19:01:39+00:00

This patch contains changes that allow iscsi_session_setup
to allocate private space for LLD's

Signed-off-by: Jayamohan Kallickal 
Acked-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] libiscsi, bnx2i: make bound ep check common

2009-09-12T14:35:33+00:00

bnx2i currently has a check for if a ep is properly bound, so if
iscsi_queuecommand/xmit_task is called while there is no ep
we will not queue IO.

be2iscsi sends IO from queuecommand/xmit_task like how bnx2i does
and needs a similar test. This patch has us just use the suspend_bit
test for this.

When ep_poll has succeeed iscsid will call conn_bind, the LLD will
then call iscsi_conn_bind which will clear the suspend bit.
When ep_disconnect is called (or if there is a conn error) we set
the suspend bit. For the ep_disconnect case I am adding a helper
in this patch that will take the session lock to make sure
iscsi_queuecommand/xmit_task is not running and it will set
the suspend bit.

Signed-off-by: Mike Christie 
Signed-off-by: Jayamohan Kallickal 
Signed-off-by: James Bottomley

[SCSI] libiscsi: add completion function for drivers that do not need pdu processing

2009-09-12T14:35:33+00:00

beiscsi does not need the iscsi scsi cmd processing. It does not
even get this info on the completion path. This adds a function
to just update the sequencing numbers and complete a task.

Signed-off-by: Mike Christie 
Signed-off-by: Jayamohan Kallickal 
Signed-off-by: James Bottomley

libiscsi: don't run scsi eh if iscsi task is making progress

2009-06-21T15:52:39+00:00

If we are sending or receiving data for the task successfully do
not run the scsi eh, because we know the task is making progress.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] libiscsi: add task aborted state

2009-05-23T20:44:13+00:00

If a task did not complete normally due to a TMF, libiscsi will
now complete the task with the state ISCSI_TASK_ABRT_TMF. Drivers
like bnx2i that need to free resources if a command did not complete normally
can then check the task state. If a driver does not need to send
a special command if we have dropped the session then they can check
for ISCSI_TASK_ABRT_SESS_RECOV.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] libiscsi: handle cleanup task races

2009-05-23T20:44:12+00:00

bnx2i needs to send a hardware specific cleanup command if
a command has not completed normally (iscsi/scsi response from
target), and the session is still ok (this is the case when we
send a TMF to stop the command).

At this time it will need to drop the session lock. The problem
with the current code is that fail_all_commands assumes we
will hold the lock the entire time, so it uses list_for_each_entry_safe.
If while bnx2i drops the session lock multiple cmds complete then
list_for_each_entry_safe will not handle this correctly.

This patch removes the running lists and just has us loop over
the cmds array (in later patches we will then replace that
array with a block tag map at the session level). It also fixes
up the completion path so that if the TMF code and the normal recv
path were completing the same command then they both do not try
to do release the refcount taken when the task is queued.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] libiscsi: export iscsi_itt_to_task for bnx2i

2009-05-23T20:44:10+00:00

bnx2i needs to be able to look up mgmt task like login and nop, because
it does some processing of them on the completion path. This exports
iscsi_itt_to_task so it can look up the task.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] cxgb3i, iser, iscsi_tcp: set target can queue

2009-04-27T15:09:54+00:00

Set target can queue limit to the number of preallocated
session tasks we have.

This along with the cxgb3i can_queue patch will fix a throughput
problem where it could only queue one LU worth of data at a time.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] libiscsi: pass session failure a session struct

2009-03-13T20:29:12+00:00

The api for conn and session failures is akward because
one takes a conn from the lib and one takes a session
from the class. This syncs up the interfaces to use
structs from the lib.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] iscsi lib: remove qdepth param from iscsi host allocation

2009-03-13T20:28:55+00:00

The qdepth setting was useful when we needed libiscsi to verify
the setting. Now we just need to make sure if older tools
passed in zero then we need to set some default.

So this patch just has us use the sht->cmd_per_lun or if
for LLD does a host per session then we can set it on per
host basis.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley