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Add virtio-blk support to path_id

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This patch adds a case handling path_id invoked on a virtio-blk device.
Currently path_id walks the parent path to virtio-pci but doesn't know
that it's the end of the path and exits without building the path (providing no
output resulting in no disk/by-path symlinks to virtio-blk devices).
This patch handles the virtio-pci path and updates the path accordingly.

/lib/udev/path_id --debug /block/vda
udev_device_new_from_syspath: device 0x2300120 has devpath '/devices/virtio-pci/virtio1/block/vda'
udev_device_new_from_syspath: device 0x2300380 has devpath '/devices/virtio-pci/virtio1'
udev_device_new_from_syspath: device 0x2300670 has devpath '/devices/virtio-pci'
ID_PATH=virtio-pci-virtio1

And with the current persistent-storage rules generates:

% ls -al /dev/disk/by-path | grep vda
lrwxrwxrwx. 1 root root   9 Jun  1 22:09 virtio-pci-virtio1 -> ../../vda

Signed-off-by: Ryan Harper <ryanh@us.ibm.com>
This commit is contained in:
Ryan Harper 2010-06-25 08:59:22 -05:00 committed by Kay Sievers
parent 310f2896eb
commit 8741f2defa
1 changed files with 3 additions and 0 deletions
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3
extras/path_id/path_id.c
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@ -448,6 +448,9 @@ int main(int argc, char **argv)
} else if (strcmp(subsys, "xen") == 0) {
path_prepend(&path, "xen-%s", udev_device_get_sysname(parent));
parent = skip_subsystem(parent, "xen");
} else if (strcmp(subsys, "virtio") == 0) {
path_prepend(&path, "virtio-pci-%s", udev_device_get_sysname(parent));
parent = skip_subsystem(parent, "virtio");
}
parent = udev_device_get_parent(parent);