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These patches enable usb autosuspend for the qemu emulated HID devices.
This reduces the cpu load for idle guests with a hid device attached
because the linux kernel will suspend the usb bus then and qemu can stop
running a 1000 Hz to emulate the (active) UHCI controller.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
The bsg devices node are created after the LUN, so we fail in the
hotplug case, but succeed at coldplug, and create inconsistent data
that way.
The bsg device event order will need to be sorted out, by changing the
kernel.
The major benefit here, is that we get the ATAPI device serial
number. With SCSI ID we didn't get this since it's not part of the
SCSI INQUIRY command. Specifically this means that we get symlinks to
empty optical drives, e.g.
/dev/disk/by-id/ata-VBOX_CD-ROM_VB2-01700376
which we didn't get earlier. So this is a major win.
Also make ata_id work on CD-ROM devices when using /dev/bsg nodes so
this works on both the scsi_device as well as the block device. We do
this, basically, by issuing the ATA IDENTIFY PACKET DEVICE command
instead of the ATA IDENTIFY command. We also use 16-byte pass-through
ATA passthrough instead of 12-byte passthrough to avoid clashing with
the MMC BLANK command.
This means that we get this output
# udevadm info -q all -p /sys/devices/pci0000:00/0000:00:01.1/host3/target3:0:0/3:0:0:0
P: /devices/pci0000:00/0000:00:01.1/host3/target3:0:0/3:0:0:0
E: UDEV_LOG=3
E: DEVPATH=/devices/pci0000:00/0000:00:01.1/host3/target3:0:0/3:0:0:0
E: DEVTYPE=scsi_device
E: DRIVER=sr
E: MODALIAS=scsi:t-0x05
E: SUBSYSTEM=scsi
E: ID_ATA=1
E: ID_TYPE=cd
E: ID_BUS=ata
E: ID_MODEL=VBOX_CD-ROM
E: ID_MODEL_ENC=VBOX\x20CD-ROM\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x 20\x20\x20\x20\x20\x20\x20
E: ID_REVISION=1.0
E: ID_SERIAL=VBOX_CD-ROM_VB2-01700376
E: ID_SERIAL_SHORT=VB2-01700376
instead of just
# udevadm info -q all -p /sys/devices/pci0000:00/0000:00:01.1/host3/target3:0:0/3:0:0:0
P: /devices/pci0000:00/0000:00:01.1/host3/target3:0:0/3:0:0:0
E: UDEV_LOG=3
E: DEVPATH=/devices/pci0000:00/0000:00:01.1/host3/target3:0:0/3:0:0:0
E: DEVTYPE=scsi_device
E: DRIVER=sr
E: MODALIAS=scsi:t-0x05
E: SUBSYSTEM=scsi
E: ID_SCSI=1
E: ID_VENDOR=VBOX
E: ID_VENDOR_ENC=VBOX\x20\x20\x20\x20
E: ID_MODEL=CD-ROM
E: ID_MODEL_ENC=CD-ROM\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20
E: ID_REVISION=1.0
E: ID_TYPE=cd
Signed-off-by: David Zeuthen <davidz@redhat.com>
In a multi-initiator setup, the HBA may very well export a SCSI device
for a device that another initiator has already logged into. But since
another initiator has already logged in, the kernel will not create a
block device.
Note that this is also the case for some RAID HBAs - for example, the
LSI 1068 series cards will export a SCSI device for a disk that is in
use by the HBAs RAID engine (no block device will be created here).
Running scsi_id and ata_id on the actual SCSI device means that we can
inquire the capabilities of the device. For example, we can check
whether ID_ATA_FEATURE_SET_SMART and ID_ATA_FEATURE_SET_SMART_ENABLED
is set and, if so, periodically poll the SMART status of the
disk. Even when other initiators has claimed the disk and if the disk
is in use by the RAID engine of the HBA.
Note that we run scsi_id and ata_id on /dev/bsg/* nodes - this is safe
to do because the scsi core guarantees that the bsg device has been
created before the actual add uevent for the scsi_device is emitted.
Since the block device is a direct child of the scsi_device we can
avoid running scsi_id and ata_id again by simply importing the
resulting ID_* properties from the parent.
Signed-off-by: David Zeuthen <davidz@redhat.com>
1. IIDC cameras from Point Grey use the vendor OUI as Specifier_ID
instead of the 1394 TA's OUI but are otherwise fully compliant to the
IIDC spec. Their device files should be accessible like those of any
other IIDC cameras.
2. Originally, the Software_Version of devices that implement FCP
(IEC 61883-1 Function Control Protocol) was meant to be a bitmap of all
command sets that an FCP capable unit supports. Bitmap flags are
defined for AV/C, CAL, EHS, HAVi, and vendor unique command sets.
Software_Version was revised to be a simple identifier instead, and
devices that support several command sets were meant to instantiate one
unit directory for each command set. Still, some devices with the flags
for AV/C and vendor unique command sets combined were released (but
apparently no devices with any other flag combinations). These rare but
existing AV/C + vendor unique devices need to be accessible just like
plain AV/C devices.
Side notes:
- Many AV/C devices make use of the Vendor Dependent AV/C command, but
this is unrelated to vendor unique FCP command sets.
- Here are all standardized FireWire protocol identifiers that I know
of, listed as Specifier_ID:Software_Version | specifier | protocol.
0x00005e:0x000001 | IANA | IPv4 over 1394 (RFC 2734)
0x00005e:0x000002 | IANA | IPv6 over 1394 (RFC 3146)
0x00609e:0x010483 | INCITS | SBP-2 (or SCSI command sets over SBP-3)
0x00609e:0x0105bb | INCITS | AV/C over SBP-3
0x00a02d:0x010001 | 1394 TA | AV/C (over FCP)
0x00a02d:0x010002 | 1394 TA | CAL
0x00a02d:0x010004 | 1394 TA | EHS
0x00a02d:0x010008 | 1394 TA | HAVi
0x00a02d:0x014000 | 1394 TA | Vendor Unique
0x00a02d:0x014001 | 1394 TA | Vendor Unique and AV/C (over FCP)
0x00a02d:0x000100 | 1394 TA | IIDC 1.04
0x00a02d:0x000101 | 1394 TA | IIDC 1.20
0x00a02d:0x000102 | 1394 TA | IIDC 1.30
0x00a02d:0x0A6BE2 | 1394 TA | DPP 1.0
0x00a02d:0x4B661F | 1394 TA | IICP 1.0
For now we are only interested in udev rules for AV/C and IIDC.
Reported-by: Damien Douxchamps <ddsf@douxchamps.net> (Point Grey IIDC ID)
Reported-by: Clemens Ladisch <clemens@ladisch.de> (AV/C + vendor unique ID)
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Using virtio-blk serial attributes add rules to extract drive serial numbers and
generate by-id links for the block device and partitions.
With these rules added, we now see the following symlinks in disk/by-id
% ls -al /dev/disk/by-id | grep vdb
lrwxrwxrwx. 1 root root 9 Jun 1 22:09 virtio-QM00001 -> ../../vda
lrwxrwxrwx. 1 root root 10 Jun 1 22:09 virtio-QM00001-part1 -> ../../vda1
Signed-off-by: Ryan Harper <ryanh@us.ibm.com>
Commit f61e72d89 failed to match for the case where an USB printer has multiple
interfaces, such as
ID_USB_INTERFACES=:ffffff:070102:
Thanks to Pablo Mazzini for spotting this!
virtio ports spawned by the virtio_console.c driver can have 'names'
assigned to them by hosts. The ports are distinguishable using these
names. Make a rule to create a symlink to the chardev associated for a
port with a name.
The symlink created is:
/dev/virtio-ports/org.libvirt.console0 -> /dev/vport0p0
if the first port for the first device was given a name of
'org.libvirt.console0'.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Some SCSI devices use the same WWN and have a WWN extension that we
need to take into account when creating the /dev/disk/by-id/wwn
symlinks. Thus, introduce ID_WWN_WITH_EXTENSION. This property will
contain either the WWN (if no extension is present) or the WWN with
the vendor extension appended.
Example:
# /lib/udev/ata_id/ata_id --export /dev/sda |grep WWN
ID_WWN=0x5001517387d61905
ID_WWN_WITH_EXTENSION=0x5001517387d61905
# /lib/udev/scsi_id --whitelisted --export -d /dev/sdb |grep WWN
ID_WWN=0x600508b400105df7
ID_WWN_VENDOR_EXTENSION=0x0000e00000d80000
ID_WWN_WITH_EXTENSION=0x600508b400105df70000e00000d80000
# /lib/udev/scsi_id --whitelisted --export -d /dev/sdc |grep WWN
ID_WWN=0x600508b400105df7
ID_WWN_VENDOR_EXTENSION=0x0000e00000db0000
ID_WWN_WITH_EXTENSION=0x600508b400105df70000e00000db0000
Signed-off-by: David Zeuthen <davidz@redhat.com>
The ID_CLASS property on input devices has been replaced by the more accurate
set of flags ID_INPUT_{KEYBOARD,KEYS,MOUSE,TOUCHPAD,TABLET,JOYSTICK}.
Rewrite 60-persistent-input.rules to use the new properties now and not export
ID_CLASS any more, since it is not used by anything else any more.
Add note about migration to NEWS, in case this is being used in custom rules.
input_id probes input/event devices for their class (keyboard, keys, mouse,
touchpad, tablet, joystick). This is based on the corresponding hal code in
hald/linux/device.c, input_test_{abs,rel,...}.
This should provide enough functionality to get hal-less X.org working (which
in particular needs to know exactly which devices are touchpads).
Replace the brittle hacks in 60-persistent-input.rules with checking for the
new ID_INPUT_* flags. This keeps the old ID_CLASS properties for now (but they
are to be removed later on).
Note: The current code has several hacks still, which are to be replaced with
proper libudev calls later on.
Now that both ata_id and scsi_id exports the World Wide Name in the
ID_WWN property, use this to create persistent symlinks. Example
/dev/disk/by-id/wwn-0x500000e01b83f360 -> ../../sdn
/dev/disk/by-id/wwn-0x500000e01b83f440 -> ../../sdm
Signed-off-by: David Zeuthen <davidz@redhat.com>
The kernel IDE drivers get deprecated now:
http://article.gmane.org/gmane.linux.ide/43151
Almost everybody has switched over to libata devices long ago.
Recent services do not work with the now deprecated IDE drivers
at all and require libata drivers and SCSI infrastructure.
Systems who care about the old stuff need to add the rules to the
compat rules.
This reverts commit 68bffc607f.
After discussing this with Kay we decided to drop this again as by-id
links only make sense for devices that have a unique serial id. If they
don't any attempts to make them unique have the side effect of
nourishing assumptions by users that cannot be met, as the by-id device
link of a device could differ depending on the history of simultaneously
plugged in device.
So, to make sure that all device nodes follow the same rules for by-id/
symlinks, drop this patch again.
If two USB sound cards that have the same serial number are plugged in
make sure the by-id/ device node symlink is unique at least during
runtime, by including the ALSA card id in the symlink name.
This is a followup to ed1b2d9fc7.
If two USB sound cards that have the same serial number are plugged in
make sure ID_ID is unique at least during runtime, by including the ALSA
card id in the ID_ID string.
Fixes issues like this one:
http://pulseaudio.org/ticket/661
