iscsi_conn_setup can fail so we must check for NULL being
returned.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

With open-iscsi support, target entries persisted in the FLASH were not
login. Added support in the qla4xxx driver to do the login on probe
time to the target entries saved in the FLASH by user.
With this changes upgrade to the new kernel with open-iscsi support in
qla4xxx will ensure users original target entries login on driver load
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NRavi Anand <ravi.anand@qlogic.com>
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Udev uses the connection's persistent address/port in the
/dev/disk/by-path name. qla4xxx is not exporting this value
so its iscsi disk names have been lacking the iscsi info.
In the old driver we did not have this information but
we do now and can fix this by just setting the flags to tell
libiscsi/scsi_transport_iscsi to export this info in sysfs.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Userspace was sending the priority/id part of the vlan tag
and sysfs was displaying the id in the vlan file. This
renames the vlan sysfs file to vlan_id to reflect that it
was showing the id and to match the vlan_priority file.
This also adds a ISCSI_NET_PARAM_VLAN_TAG iscsi nl command
to relfect that we are sending down the vlan/priority
part of the tag.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

This has the driver use helpers for a common operation and fixes
a issue where if multiple iscsi params are sent they could be
sent at offsets that cause unaligned accesses. The nla helpers
account for the padding needed to align properly for the driver.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

JIRA Key: UPSISCSI-75
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

When sendtargets response is greater then max receive data segment length,
the passthrough IOCB failed with data overrun status. Solution is to
allocate space for iSCSI header in the IOCB response buffer.

JIRA Key: UPSISCSI-147
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

When iscsid restarted for an existing active session, set DDB will
fail with status already logged in. In this case, we have to send
logged in event to iscsid.

JIRA Key: OPENISCSI-21
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Devices are getting blocked during continuous link up and down.
Solution is, during relogin unblock the session, using iscsi_conn_start,
before sending connection logged in event.

JIRA Key: UPSISCSI-138
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

During link down, iscsid tries to do re-login to failed session. In case of
link down-up-down, LLD was sending connection login failed event to iscsid,
which is destroying the session, instead we have to continue re-login by
sending connection err event.

JIRA Key: UPSISCSI-134
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Unable to login to session if login-logout issued consecutively for
multiple sessions. Solution is to clear idx in DDB map on the basis
of no-active connection asynchronous event (AEN).

JIRA Key: UPSISCSI-135
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

If a boot target has a BIDI CHAP enabled, then read the user/secret from
CHAP table. Do not assume BIDI chap at peer CHAP index + 1

JIRA Key: UPSISCSI-156
Signed-off-by: NLalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

The driver failed to export primary boot target if secondary target did not
exist in the FLASH. If boot targets are not valid then driver assumed 0 and
1 as default boot targets. Since these target did not exist in flash, the
driver failed exporting all the targets.

JIRA Key: UPSISCSI-148
Signed-off-by: NLalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

QLogic applications store the CHAP information in FLASH. During login,
authentication information is provided using an index into the CHAP region.

In order to support QLogic applications along with iscsiadm, updated the
LLD to not add duplicate CHAP entries in the CHAP region and preserve the
existing CHAP info in the CHAP region in FLASH.
This allows QLogic applications to pre-write the CHAP entries in the
CHAP region.

With iscsiadm, when the CHAP authentication information is sent to the LLD, the
LLD searches for the entry in CHAP region in FLASH, if exists then do not add.
If CHAP entry does not exist then add the CHAP entry in the CHAP region.

JIRA Key: UPSISCSI-146
Signed-off-by: NLalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Export the name of iface session is attached to. This is needed
so tools like iscsiadm/iscsistart can match the sessions to
userspace ifaces when rebuilding iscsid's state during boot.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Hook qla4xxx in fw boot sysfs interface so iscsi tools
can use the info to create boot sessions.
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

1. Remove device database entry (ddb) state.
2. Remove device database (DDB) list building.
                With open-iscsi integration the logins to the target devices are
        handled by the user space. So the information of target is now
        maintained in the iscsi_session object. This is handled at
        libiscsi level so there is no need to maintain a list of DDBs in
        the qla4xxx LLD.
3. qla4xxx: Remove add_device_dynamically.
                Since autologin in FW is disabled with open-iscsi integration,
        driver will never get an AEN for which driver has not requested
        a DDB index. So remove the add_device_dynamically function.
4. Remove qla4xxx_tgt_dscvr
        Since firmware autologin is disabled this function will not work.
        Now user has the ability to do the target discovery and login to
        each target individually. Firwmare will not do the login on its own.
5. Remove relogin related code
        All relogin is handled by userspace now. qla4xxx just need to
        notify userspace of a connection failure, this triggers the
        relogin.
6. Remove add_session and alloc_session
        Now qla4xxx uses iscsi_session_setup that would do the necessary
        allocations for session and ddb_entry.
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NLalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Add scsi_transport_iscsi hooks in qla4xxx to support
iSCSI session management using iscsiadm.

This patch is based on discussion here
http://groups.google.com/group/open-iscsi/browse_thread/thread/e89fd888baf656a0#

Now users can use iscsiadm to do target discovery and do login/logout to
individual targets using the qla4xxx iSCSI class interface.

This patch leaves some dead code, but to make it easier to review
we are leaving and in the next patch we will remove that old code.

V2 - NOTE: Added code to avoid waiting for AEN during login/logout
in the driver, instead added a kernel to user event
to notify iscsid about login status. Because of this
iscsid will not get blocked.
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NLalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

This patch adds bsg support to qla4xxx.
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: NHarish Zunjarrao <harish.zunjarrao@qlogic.com>
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Add support to set VLAN and show vlan settings in sysfs
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: NHarish Zunjarrao <harish.zunjarrao@qlogic.com>
[Patch updated to new defines]
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

The iscsi class currently does not support writable sysfs
attrs for LLD sysfs settings. This patch converts the
iscsi class and driver's host attrs to use the attribute
container sysfs group and the sysfs group's is_visible callout
to be able to support readable or writable sysfs attrs.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

We can replace the iface param mask with the
attr_is_visible callback.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

The iscsi class currently does not support writable sysfs
attrs for LLD sysfs settings. This patch converts the
iscsi class and driver's session attrs to use the attribute
container sysfs group and the sysfs group's is_visible callout
to be able to support readable or writable sysfs attrs.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

The iscsi class currently does not support writable sysfs
attrs for LLD sysfs settings. This patch converts the
iscsi class and drivers to use the attribute container
sysfs group and the sysfs group's is_visible callout
to be able to support readable or writable sysfs attrs.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Add support for default ipv4 and ipv6 ifaces in qla4xxx.
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NLalit Chandivade <lalit.chandivade@qlogic.com>
Reviewed-by: NHarish Zunjarrao <harish.zunjarrao@qlogic.com>
[make iface creation dynamic]
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

- Move all ipaddress related param to "struct ipaddress_config"
  from "struct scsi_qla_host"
- update function - qla4xxx_update_local_ip()
- Rename IPOPT_IPv4_PROTOCOL_ENABLE to IPOPT_IPV4_PROTOCOL_ENABLE
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
[update for new ISCSI_IFACE values]
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Allows user space (iscsiadm) to send down network configuration
parameters for LLD to set private network configuration on the iSCSI
adapters.

Based on patches from Vikas Chaudhary.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Added fw_version, serial_num, iscsi version and boot loader version
sysfs attributes.
Signed-off-by: NHarish Zunjarrao <harish.zunjarrao@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <jbottomley@parallels.com>

Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <jbottomley@parallels.com>

Since queue_work does not requeue, there is no need to check
if a work is in progress using the AF_DPC_SCHEDULED flag.
queue_work would return if work is pending without adding the
work, do_dpc would again get invoked from qla4xxx_timer if
there is still DPC flags set.
Signed-off-by: NLalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <jbottomley@parallels.com>

Corrected logic to don't check for F/W is alive if reset is already
in progress for ISP82XX
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <jbottomley@parallels.com>

Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <jbottomley@parallels.com>

Stop using cmd->serial_number in printks.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: NLucas De Marchi <lucas.demarchi@profusion.mobi>

Move relogin to all devices code from do_dpc to new
fuction qla4xxx_relogin_all_devices()
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Target Session Recovery Timeout
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

This provides the flexibility to modify the qdepth based on different
target devices to make the best use of system resources.
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>