akpm@xxxxxxxxxxxxxxxxxxxx wrote:
From: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
If a scsi_device supports async notification for media change, then let user
space know this capability exists by creating a new sysfs entry
"media_change_notify", which will be 1 if it is supported, and 0 if not
supported. Create a routine which allows scsi devices to send a uevent when
media change events occur.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
Cc: Jeff Garzik <jeff@xxxxxxxxxx>
Cc: Tejun Heo <htejun@xxxxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
ACK
Though I either (a) would like SCSI maintainers to apply this, or (b)
would like SCSI maintainers to ACK this before I apply it myself.
Or IOW, if others are happy, I'm happy :)
The follow-up patch "libata: expose AN to user space" requires this one
in order to compile, so it has the same fate.
Additional background, for those interested: libata-dev.git#upstream
(2.6.24 queue) already contains Kristen's libata-specific portions of
the media event notification. Internally, all the "guts" are there, and
we currently call a no-op function that's waiting for the SCSI guts:
void ata_scsi_media_change_notify(struct ata_device *dev)
{
#ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
if (dev->sdev)
scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE);
#endif
}
Regards,
Jeff
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