linux-toradex.git/drivers/scsi/libfc/fc_rport.c, branch v3.2.48

scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required

2011-10-31T23:31:23+00:00

For the basic SCSI infrastructure files that are exporting symbols
but not modules themselves, add in the basic export.h header file
to allow the exports.

Signed-off-by: Paul Gortmaker

Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

2011-07-23T18:13:11+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (77 commits)
  [SCSI] fix crash in scsi_dispatch_cmd()
  [SCSI] sr: check_events() ignore GET_EVENT when TUR says otherwise
  [SCSI] bnx2i: Fixed kernel panic due to illegal usage of sc->request->cpu
  [SCSI] bfa: Update the driver version to 3.0.2.1
  [SCSI] bfa: Driver and BSG enhancements.
  [SCSI] bfa: Added support to query PHY.
  [SCSI] bfa: Added HBA diagnostics support.
  [SCSI] bfa: Added support for flash configuration
  [SCSI] bfa: Added support to obtain SFP info.
  [SCSI] bfa: Added support for CEE info and stats query.
  [SCSI] bfa: Extend BSG interface.
  [SCSI] bfa: FCS bug fixes.
  [SCSI] bfa: DMA memory allocation enhancement.
  [SCSI] bfa: Brocade-1860 Fabric Adapter vHBA support.
  [SCSI] bfa: Brocade-1860 Fabric Adapter PLL init fixes.
  [SCSI] bfa: Added Fabric Assigned Address(FAA) support
  [SCSI] bfa: IOC bug fixes.
  [SCSI] bfa: Enable ASIC block configuration and query.
  [SCSI] bnx2i: Updated copyright and bump version
  [SCSI] bnx2i: Modified to skip CNIC registration if iSCSI is not supported
  ...

Fix up some trivial conflicts in:
 - drivers/scsi/bnx2fc/{bnx2fc.h,bnx2fc_fcoe.c}:
	Crazy broadcom version number conflicts
 - drivers/target/tcm_fc/tfc_cmd.c
	Just trivial cleanups done on adjacent lines

scsi,rcu: Convert call_rcu(fc_rport_free_rcu) to kfree_rcu()

2011-07-20T21:10:12+00:00

The rcu callback fc_rport_free_rcu() just calls a kfree(),
so we use kfree_rcu() instead of the call_rcu(fc_rport_free_rcu).

Signed-off-by: Lai Jiangshan 
Signed-off-by: Paul E. McKenney 
Cc: Robert Love 
Cc: "James E.J. Bottomley" 
Reviewed-by: Josh Triplett

[SCSI] libfc: Enhancement to RPORT state machine applicable only for VN2VN mode

2011-06-29T21:28:33+00:00

Problem: Existing RPORT state machine continues witg FLOGI/PLOGI
process only after it receices beacon from other end. Once claiming
stage is over (either clain notify or clain repose), beacon is sent
and state machine enters into operational mode where it initiates the
rlogin process (FLOGI/PLOGI) to the peer but before this rlogin is
initiated, exitsing implementation checks if it received beacon from
other end, it beacon is not received yet, rlogin process is not
initiated. Other end initiates FLOGI but peer end keeps on rejecting
FLOGI, hence after 3 retries other end deletes associated rport, then
sends a beacon. Once the beacon is received, peer end now initiates
rlogin to the peer end but since associated rport is deleted FLOGI is
neither accepted nor the reject response send out because rport is
deleted. Hence unable to proceed withg FLOGI/PLOGI process and fails
to establish VN2VN connection.

Fix: VN2VN spec is not standard yet but based on exitsing collateral
on T11, it appears that, both end shall send beacon and enter into
'operational mode' without explictly waiting for beacon from other
end. Fix is to allow the RPORT login process as long as respective
RPORT is created (as part of claim notification / claim response) even
though state of RPORT is INIT. Means don't wait for beacon from peer
end, if peer end initiates FLOGI (means peer end exist and
responding).

Notes: This patch is preparing the FCoE stack for target wrt
offload. This is generic patch and harmless even if applied on storage
initiator because 'else if' condition of function 'fcoe_oem_found'
shall evaluate to TRUE only for targets.

Dependencies: None

Signed-off-by: Kiran Patil 
Signed-off-by: Robert Love 
Signed-off-by: James Bottomley

[SCSI] libfc: Fixing a memory leak when destroying an interface

2011-03-01T00:28:45+00:00

When an fcoe interface is being destroyed; in the process the
fcoe driver will try to release all the resources it had allocated
for that interface including rports. But, it seems that it does not
release the reference held for the name server rport in that process
resulting into a memory leak. This patch fixes that memory leak.

Signed-off-by: Neerav Parikh 
Tested-by: Ross Brattain 
Signed-off-by: Robert Love 
Signed-off-by: James Bottomley

[SCSI] libfc: introduce LLD event callback

2011-02-12T17:09:04+00:00

This patch enables LLD to listen to rport events and perform LLD
specific operations based on the rport event. This patch also stores
sp_features and spp_type in rdata for further reference by LLD.

Signed-off-by: Bhanu Prakash Gollapudi 
Signed-off-by: Robert Love 
Signed-off-by: James Bottomley

[SCSI] libfc: use PRLI hook to get parameters when sending outgoing PRLI

2011-02-12T17:02:22+00:00

When sending an outgoing PRLI as an initiator, get the parameters
from registered providers so that they all get a chance to decide
on roles.

The passive provider is called last, and could override the
initiator role.

Signed-off-by: Joe Eykholt 
Signed-off-by: Robert Love 
Signed-off-by: James Bottomley

[SCSI] libfc: add hook for FC-4 provider registration

2011-02-12T17:00:40+00:00

Allow FC-4 provider modules to hook into libfc, mostly for targets.
This should allow any FC-4 module to handle PRLI requests and maintain
process-association states.

Each provider registers its ops with libfc and then will be called for
any incoming PRLI for that FC-4 type on any instance.   The provider
can decide whether to handle that particular instance using any method
it likes, such as ACLs or other configuration information.

A count is kept of the number of successful PRLIs from the remote port.
Providers are called back with an implicit PRLO when the remote port
is about to be deleted or has been reset.

fc_lport_recv_req() now sends incoming FC-4 requests to FC-4 providers,
and there is a built-in provider always registered for handling
incoming ELS requests.

The call to provider recv() routines uses rcu_read_lock()
so that providers aren't removed during the call.  That lock is very
cheap and shouldn't affect any performance on ELS requests.
Providers can rely on the RCU lock to protect a session lookup as well.

Signed-off-by: Joe Eykholt 
Signed-off-by: Robert Love 
Signed-off-by: James Bottomley

[SCSI] libfc: fix sparse static and non-ANSI warnings

2011-02-12T17:00:08+00:00

Fix sparse warning for non-ANSI function declaration.
Declare workqueue structs as static.

Signed-off-by: Randy Dunlap 
Cc:	Robert Love 
Signed-off-by: Robert Love 
Signed-off-by: James Bottomley

[SCSI] libfc: Cleanup return paths in fc_rport_error_retry

2011-02-12T16:57:22+00:00

This patch makes it so that we only have one call to
fc_rport_error. This patch does not completely
consolidate return statements, there is still one return
used when not calling fc_rport_error, but alternative
solutions made the code more confusing.

[ Patch modified by Robert Love ]
[ Patch title and commit message edited by Robert Love
  to make it more relevant ]

Signed-off-by: Hillf Danton 
Signed-off-by: Robert Love 
Signed-off-by: James Bottomley