kernel.git/include/scsi/libiscsi.h, branch linux-2.6.31.y

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

2009-06-21T15:52:39Z

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

2009-05-23T20:44:13Z

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

2009-05-23T20:44:12Z

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

2009-05-23T20:44:10Z

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

2009-04-27T15:09:54Z

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

2009-03-13T20:29:12Z

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

2009-03-13T20:28:55Z

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

[SCSI] iscsi lib: have lib create work queue for transmitting IO

2009-03-13T20:28:37Z

We were using the shost work queue which ended up being a little akward since all iscsi hosts need a thread for scanning, but only drivers hooked into libiscsi need a workqueue for transmitting. So this patch moves the xmit workqueue to the lib. Signed-off-by: Mike Christie Signed-off-by: James Bottomley

[SCSI] libiscsi: don't cap queue depth in iscsi modules

2009-03-13T20:28:06Z

There is no need to cap the queue depth in the modules. We set this in userspace and can do that there. For performance testing with ram based targets, this is helpful since we can have very high queue depths. Signed-off-by: Mike Christie Signed-off-by: James Bottomley

[SCSI] libiscsi: replace scsi_debug logging with session/conn logging

2009-03-13T20:27:09Z

This makes the logging a compile time option and replaces the scsi_debug macro with session and connection ones that print out a driver model id prefix. Signed-off-by: Mike Christie Signed-off-by: James Bottomley