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authorJames Bottomley <James.Bottomley@HansenPartnership.com>2008-03-23 06:42:27 +0300
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-04-23 00:16:31 +0400
commit643eb2d932c97a0583381629d632d486934cf7ee (patch)
tree514d860d8b6c22f50b8fdd7afd25047707321650 /drivers/scsi/scsi_sysfs.c
parentf7120a4f75168df3c02efacd10403a4ba0bcb29d (diff)
downloadlinux-643eb2d932c97a0583381629d632d486934cf7ee.tar.xz
[SCSI] rework scsi_target allocation
The current target allocation code registeres each possible target with sysfs; it will be deleted again if no useable LUN on this target was found. This results in a string of 'target add/target remove' uevents. Based on a patch by Hannes Reinecke <hare@suse.de> this patch reworks the target allocation code so that only uevents for existing targets are sent. The sysfs registration is split off from the existing scsi_target_alloc() into a in a new scsi_add_target() function, which should be called whenever an existing target is found. Only then a uevent is sent, so we'll be generating events for existing targets only. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
-rw-r--r--drivers/scsi/scsi_sysfs.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 84e2a8ad83c9..198aa4571e35 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -809,6 +809,27 @@ sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
return count;
}
+static int scsi_target_add(struct scsi_target *starget)
+{
+ int error;
+
+ if (starget->state != STARGET_CREATED)
+ return 0;
+
+ error = device_add(&starget->dev);
+ if (error) {
+ dev_err(&starget->dev, "target device_add failed, error %d\n", error);
+ get_device(&starget->dev);
+ scsi_target_reap(starget);
+ put_device(&starget->dev);
+ return error;
+ }
+ transport_add_device(&starget->dev);
+ starget->state = STARGET_RUNNING;
+
+ return 0;
+}
+
static struct device_attribute sdev_attr_queue_type_rw =
__ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
sdev_store_queue_type_rw);
@@ -824,10 +845,16 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
{
int error, i;
struct request_queue *rq = sdev->request_queue;
+ struct scsi_target *starget = sdev->sdev_target;
if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0)
return error;
+ error = scsi_target_add(starget);
+ if (error)
+ return error;
+
+ transport_configure_device(&starget->dev);
error = device_add(&sdev->sdev_gendev);
if (error) {
put_device(sdev->sdev_gendev.parent);