kernel/drivers/scsi/libfc/fc_disc.c, branch linux-4.3.y

libfc, fcoe, bnx2fc: Split fc_disc_init into fc_disc_{init, config}

2013-03-25T23:03:03Z

Split discovery initialization in code that is setup once (fcoe_disc_init) and code that can be re-configured (fcoe_disc_config). Signed-off-by: Robert Love Tested-by: Jack Morgan Reviewed-by: Bhanu Prakash Gollapudi

libfc, fcoe, bnx2fc: Always use fcoe_disc_init for discovery layer initialization

2013-03-25T23:01:10Z

Currently libfcoe is doing some libfc discovery layer initialization outside of libfc. This patch moves this code into libfc and sets up a split in discovery (one time) initialization code and (re-configurable) settings that will come in the next patch. Signed-off-by: Robert Love Tested-by: Jack Morgan Reviewed-by: Bhanu Prakash Gollapudi

[SCSI] libfc: Handle discovery failure during ctlr link down

2012-02-19T15:27:26Z

While we wait for GPN_FT response, if the ctlr link goes down, the stack generates a completion for GPN_FT with error FC_EXCH_CLOSED, and reports a discovery error. Discovery is not retried in this case, and rightly so. However, the 'pending' flag stays set, which does not allow subsequent discovery to succeed as GPN_FT will never be issued. Fix it by clearing the pending flag when the discovery fails due to GPN_FT failure. Signed-off-by: Bhanu Prakash Gollapudi Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfc: Declare local functions static

2012-01-16T08:45:48Z

Avoid that sparse complains about missing declarations for local functions by declaring these static or by adding an #include directive. Add the __percpu annotation where it is missing. Signed-off-by: Bart Van Assche Reviewed-by: Yi Zou Signed-off-by: Robert Love Signed-off-by: James Bottomley

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

2011-10-31T23:31:23Z

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

[SCSI] libfc: fix mm leak in handling incoming request for target discovery

2011-05-24T16:36:41Z

When handling incoming request, if the operation code carried by the received frame is not RSCN, the frame should be freed as in the RSCN case, or there is memory leakage. Signed-off-by: Hillf Danton Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfc: Do not let disc work cancel itself

2010-10-25T20:11:37Z

When number of NPIV ports created are greater than the xids allocated per pool -- for eg., creating 255 NPIV ports on a system with nr_cpu_ids of 32, with each pool containing 128 xids -- and then generating a link event - for eg., shutdown/no shutdown -- on the switch port causes the hang with the following stack trace. Call Trace: schedule_timeout+0x19d/0x230 wait_for_common+0xc0/0x170 __cancel_work_timer+0xcf/0x1b0 fc_disc_stop+0x16/0x30 [libfc] fc_lport_reset_locked+0x47/0x90 [libfc] fc_lport_enter_reset+0x67/0xe0 [libfc] fc_lport_disc_callback+0xbc/0xe0 [libfc] fc_disc_done+0xa8/0xf0 [libfc] fc_disc_timeout+0x29/0x40 [libfc] run_workqueue+0xb8/0x140 worker_thread+0x96/0x110 kthread+0x96/0xa0 child_rip+0xa/0x20 Fix is to not cancel the disc_work if discovery is already stopped, thus allowing lport state machine to restart and try discovery again. Signed-off-by: Bhanu Prakash Gollapudi Acked-by: Joe Eykholt Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfc: don't require a local exchange for incoming requests

2010-07-28T14:06:02Z

Incoming requests shouldn't require a local exchange if we're just going to reply with one or two frames and don't expect anything further. Don't allocate exchanges for such requests until requested by the upper-layer protocol. The sequence is always NULL for new requests, so remove that as an argument to request handlers. Also change the first argument to lport->tt.seq_els_rsp_send from the sequence pointer to the received frame pointer, to supply the exchange IDs and destination ID info. Signed-off-by: Joe Eykholt Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfc: add discovery-private pointer for LLD

2010-07-28T14:05:52Z

For VN_port to VN_port mode, FIP will do discovery and needs a way to find its state from the local port or discovery structure. It seems that any other LLD that implements its own discovery would also need something like this. Replace disc->lport with disc->priv, and use container_of to find the lport. We could use disc->priv for that, but container_of is smaller and faster. Signed-off-by: Joe Eykholt Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfc: convert rport lookup to be RCU safe

2010-07-28T14:05:48Z

To allow LLD to do lookups on rports without grabbing a mutex, make them RCU-safe. The caller of lport->tt.rport_lookup will have the choice of holding disc_mutex or the rcu_read_lock(). Signed-off-by: Joe Eykholt Signed-off-by: Robert Love Signed-off-by: James Bottomley