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[SCSI] sr,sd: send media state change modification events

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This will send for a card reader slot (remove/add media):
  UEVENT[1187091572.155884] change   /devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/host7/target7:0:0/7:0:0:0 (scsi)
  UEVENT[1187091572.162314] remove   /block/sdb/sdb1 (block)
  UEVENT[1187091572.172464] add      /block/sdb/sdb1 (block)
  UEVENT[1187091572.175408] change   /devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/host7/target7:0:0/7:0:0:0 (scsi)

and for a DVD drive (add/eject media):
  UEVENT[1187091590.189159] change   /devices/pci0000:00/0000:00:1f.1/host4/target4:0:0/4:0:0:0 (scsi)
  UEVENT[1187091590.957124] add      /module/isofs (module)
  UEVENT[1187091604.468207] change   /devices/pci0000:00/0000:00:1f.1/host4/target4:0:0/4:0:0:0 (scsi)

Userspace gets events, even for unpartitioned media. This unifies
the event handling for asynchronoous events (AN) and events caused by
perodical polling the device from userspace.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>

[jejb: modified for new event API]

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Kay Sievers
2007-08-14 14:10:39 +02:00
committed by James Bottomley
parent d0c4c9d4a2
commit 285e9670d9
4 changed files with 28 additions and 12 deletions
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14
drivers/scsi/sr.c
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@@ -192,8 +192,9 @@ static int sr_media_change(struct cdrom_device_info *cdi, int slot)
* and we will figure it out later once the drive is
* available again. */
cd->device->changed = 1;
return 1; /* This will force a flush, if called from
* check_disk_change */
/* This will force a flush, if called from check_disk_change */
retval = 1;
goto out;
};
retval = cd->device->changed;
@@ -203,9 +204,16 @@ static int sr_media_change(struct cdrom_device_info *cdi, int slot)
if (retval) {
/* check multisession offset etc */
sr_cd_check(cdi);
get_sectorsize(cd);
}
out:
/* Notify userspace, that media has changed. */
if (retval != cd->previous_state)
sdev_evt_send_simple(cd->device, SDEV_EVT_MEDIA_CHANGE,
GFP_KERNEL);
cd->previous_state = retval;
return retval;
}