linux/include/scsi/libfc.h, branch v3.0

Fix common misspellings

2011-03-31T14:26:23Z

Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi

[SCSI] libfc: introduce LLD event callback

2011-02-12T17:09:04Z

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: export seq_release() for users of seq_assign()

2011-02-12T17:03:40Z

Target modules using lport->tt.seq_assign() get a hold on the exchange but have no way of releasing it. Add that. Signed-off-by: Joe Eykholt Signed-off-by: James Bottomley

[SCSI] libfc: add hook to notify providers of local port changes

2011-02-12T17:02:20Z

When an SCST provider is registered, it needs to know what local ports are available for configuration as targets. Add a notifier chain that is invoked when any local port that is added or deleted. Maintain a global list of local ports and add an interator function that calls a given function for every existing local port. This is used when first loading a provider. Signed-off-by: Joe Eykholt Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfc: add local port hook for provider session lookup

2011-02-12T17:02:17Z

The target provider needs a per-instance lookup table or other way to lookup sessions quickly without going through a linear list or serializing too much. Add a simple void * array indexed by FC-4 type to the fc_lport. Signed-off-by: Joe Eykholt Committed-by: Nicholas A. Bellinger Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfc: add method for setting handler for incoming exchange

2011-02-12T17:01:21Z

Add a method for setting handler for incoming exchange. For multi-sequence exchanges, this allows the target driver to add a response handler for handling subsequent sequences, and exchange manager resets. The new function is called fc_seq_set_resp(). Signed-off-by: Joe Eykholt Signed-off-by: Robert Love Signed-off-by: James Bottomley

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

2011-02-12T17:00:40Z

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 statistics for FCP input/output megabytes

2010-12-21T18:24:34Z

The statistics for InputMegabytes and OutputMegabytes are misnamed. They're accumulating bytes, not megabytes. The statistic returned via /sys must be in megabytes, however, which is what the HBA-API wants. The FCP code needs to accumulate it in bytes and then divide by 1,000,000 (not 2^20) before it presented via sysfs. This affects fcoe.ko only, not fnic. The fnic driver correctly by accumulating bytes and then converts to megabytes. I checked that libhbalinux is using the /sys file directly without conversion. BTW, qla2xxx does divide by 2^20, which I'm not fixing here. Signed-off-by: Joe Eykholt Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfc: remove tgt_flags from fc_fcp_pkt struct

2010-12-21T18:24:22Z

We can easily remove the tgt_flags from fc_fcp_pkt struct and use rpriv->tgt_flags directly where needed. Signed-off-by: John Fastabend Signed-off-by: Robert Love Signed-off-by: James Bottomley

SCSI host lock push-down

2010-11-16T21:33:23Z

Move the mid-layer's ->queuecommand() invocation from being locked with the host lock to being unlocked to facilitate speeding up the critical path for drivers who don't need this lock taken anyway. The patch below presents a simple SCSI host lock push-down as an equivalent transformation. No locking or other behavior should change with this patch. All existing bugs and locking orders are preserved. Additionally, add one parameter to queuecommand, struct Scsi_Host * and remove one parameter from queuecommand, void (*done)(struct scsi_cmnd *) Scsi_Host* is a convenient pointer that most host drivers need anyway, and 'done' is redundant to struct scsi_cmnd->scsi_done. Minimal code disturbance was attempted with this change. Most drivers needed only two one-line modifications for their host lock push-down. Signed-off-by: Jeff Garzik Acked-by: James Bottomley Signed-off-by: Linus Torvalds