linux-toradex.git/include/scsi/libiscsi.h, branch v2.6.24.2

[SCSI] libiscsi: sync up iscsi and scsi eh's access to the connection

2007-08-15T18:09:21+00:00

The iscsi eh could be tearing down the session/connection while
the scsi eh is still sending task management functions. If when
we drop the session lock to grab the recv lock, the iscsi eh
tears down the connection we will oops.

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

[SCSI] libiscsi: fix cmd seqeunce number checking

2007-07-27T13:12:05+00:00

We should not be checking the cmd windown for just handling r2t responses.
And if the window closes in on us, always have scsi-ml requeue the command
from our queuecommand function.

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

[SCSI] iscsi class, iscsi_tcp, iser, qla4xxx: add netdevname sysfs attr

2007-06-02T19:38:04+00:00

iSCSI must support software iscsi (iscsi_tcp, iser), hardware iscsi (qla4xxx),
and partial offload (broadcom). To be able to allow each stack or driver
or port (virtual or physical) to be able to log into the same target portal
we use the initiator tuple [[HWADDRESS | NETDEVNAME], INITIATOR_NAME] and
the target tuple [TARGETNAME, CONN_ADDRESS, CONN_PORT] to id a session.
This patch adds the netdev name, which is used by software iscsi when
it binds a session to a netdevice using the SO_BINDTODEVICE sock opt.
It cannot use HWADDRESS because if someone did vlans then the same netdevice
will have the same mac and the initiator,target id will not be unique.

Signed-off-by: Mike Christie 
Cc: Roland Dreier 
Cc: David C Somayajulu 
Signed-off-by: James Bottomley

[SCSI] iscsi class, qla4xxx, iscsi_tcp: export local address

2007-06-02T19:37:19+00:00

This patch exports the local address for the session. For
qla4xxx this is the ip of the hba's port. For software
this is the src addr of the socket.

Signed-off-by: Mike Christie 
Cc: David C Somayajulu 
Signed-off-by: James Bottomley

[SCSI] libiscsi: make can_queue configurable

2007-06-02T19:34:46+00:00

This patch allows us to set can_queue and cmds_per_lun from userspace
when we create the session/host. From there we can set it on a per
target basis. The patch fully converts iscsi_tcp, but only hooks
up ib_iser for cmd_per_lun since it currently has a lots of preallocations
based on can_queue.

Signed-off-by: Mike Christie 
Cc: Roland Dreier 
Signed-off-by: James Bottomley

[SCSI] libiscsi: fix iscsi cmdsn allocation

2007-06-02T19:34:14+00:00

The cmdsn allocation and pdu transmit code can race, and we can end
up sending a pdu with cmdsn 10 before a pdu with 5. The target will
then fail the connection/session. This patch fixes the problem by
delaying the cmdsn allocation until we are about to send the pdu.

This also removes the xmitmutex. We were using the connection xmitmutex
during error handling to handle races with mtask and ctask cleanup and
completion. For ctasks we now have nice refcounting and for the mtask,
if we hit the case where the mtask timesout and it is floating
around somewhere in the driver, we end up dropping the session.
And to handle session level cleanup, we use the xmit suspend bit
along with scsi_flush_queue and the session lock to make sure
that the xmit thread is not possibly transmitting a task while
we are trying to kill it.

Signed-off-by: Mike Christie 
Cc: Roland Dreier 
Signed-off-by: James Bottomley

[SCSI] iscsi class, iscsi_tcp, ib_iser: add sysfs chap file

2007-06-01T16:58:58+00:00

The attached patches add sysfs files for the chap settings
to the iscsi transport class, iscsi_tcp and ib_iser. This is
needed for software iscsi because there are times when iscsid
can die and it will need to reread the values it was using.
And it is needed by qla4xxx for basic management opertaions.
This patch does not hook in qla4xxx yet, because I am not sure
the mbx command to use.

Signed-off-by: Mike Christie 
Cc: Roland Dreier 
Signed-off-by: James Bottomley

[SCSI] iscsi: Some fixes in preparation for bidirectional support - total_length

2007-06-01T16:58:22+00:00

- Remove shadow of request length from struct iscsi_cmd_task.
- change all users to use scsi_cmnd->request_bufflen directly

(With bidi we will use scsi-ml API to retrieve in/out length)

Signed-off-by: Boaz Harrosh 
Signed-off-by: Benny Halevy 
Signed-off-by: Mike Christie 
Cc: Roland Dreier 
Signed-off-by: James Bottomley

[SCSI] iscsi: Some fixes in preparation for bidirectional support - exp_datasn

2007-06-01T16:57:17+00:00

This patch fixes handling of expected datasn/r2tsn as received from
target. It is done according to: T10 rfc3720 section 3.2.2.3. Data Sequencing.

. unify expected datasn/r2tsn into one counter
. calculate than check expected datasn/r2tsn. On error print a message
  and fail the request. (TODO use iscsi retransmits)
. remove the FIXME   ;)
. avoid zero length memset

Signed-off-by: Boaz Harrosh 
Signed-off-by: Benny Halevy 
Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] iscsi class, qla4xxx, iscsi_tcp, ib_iser: export/set initiator name

2007-06-01T16:56:40+00:00

For iscsi root boot, software iscsi needs to know what the BIOS/OF
initiator used for the initiator name so this puts it in sysfs
for userspace to be able to pick up.

For hw iscsi, it is nice to see what the card is using.

This patch adds the new param, and hooks in qla4xxx, iscsi_tcp, and ib_iser.

Signed-off-by: Mike Christie 
Cc: Roland Dreier 
Cc: David C Somayajulu 
Signed-off-by: James Bottomley