From e02f3f59225d8c3b2a0ad0dc941a09865e27da61 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 13 Jan 2006 19:04:00 +0100 Subject: [SCSI] remove target parent limitiation When James Smart fixed the issue of the userspace scan atributes crashing the system with the FC transport class he added a patch to let the transport class check if the parent is valid for a given transport class. When adding support for the integrated raid of fusion sas devices we ran into a problem with that, as it didn't allow adding virtual raid volumes without the transport class knowing about it. So this patch adds a user_scan attribute instead, that takes over from scsi_scan_host_selected if the transport class sets it and thus lets the transport class control the user-initiated scanning. As this plugs the hole about user-initiated scanning the target_parent hook goes away and we rely on callers of the scanning routines to do something sensible. For SAS this meant I had to switch from a spinlock to a mutex to synchronize the topology linked lists, in FC they were completely unsynchronized which seems wrong. Signed-off-by: Christoph Hellwig Signed-off-by: James Bottomley --- drivers/scsi/scsi_transport_fc.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) (limited to 'drivers/scsi/scsi_transport_fc.c') diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c index 625f4a6..f2c9acf 100644 --- a/drivers/scsi/scsi_transport_fc.c +++ b/drivers/scsi/scsi_transport_fc.c @@ -1093,17 +1093,23 @@ static int fc_rport_match(struct attribute_container *cont, /* * Must be called with shost->host_lock held */ -static struct device *fc_target_parent(struct Scsi_Host *shost, - int channel, uint id) +static int fc_user_scan(struct Scsi_Host *shost, uint channel, + uint id, uint lun) { struct fc_rport *rport; - list_for_each_entry(rport, &fc_host_rports(shost), peers) - if ((rport->channel == channel) && - (rport->scsi_target_id == id)) - return &rport->dev; + list_for_each_entry(rport, &fc_host_rports(shost), peers) { + if (rport->scsi_target_id == -1) + continue; - return NULL; + if ((channel == SCAN_WILD_CARD || channel == rport->channel) && + (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) { + scsi_scan_target(&rport->dev, rport->channel, + rport->scsi_target_id, lun, 1); + } + } + + return 0; } struct scsi_transport_template * @@ -1142,7 +1148,7 @@ fc_attach_transport(struct fc_function_template *ft) /* Transport uses the shost workq for scsi scanning */ i->t.create_work_queue = 1; - i->t.target_parent = fc_target_parent; + i->t.user_scan = fc_user_scan; /* * Setup SCSI Target Attributes. -- cgit v1.1