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| author | Michal Sekletar <msekleta@redhat.com> | 2016-02-09 09:57:45 +0100 |
|---|---|---|
| committer | Michal Sekletar <msekleta@redhat.com> | 2016-02-09 12:25:42 +0100 |
| commit | f073b1b3c0f4f0df1b0bd61042ce85fb5d27d407 (patch) | |
| tree | 0a849ee98e45e1c3ec8328d3636b3600f02fbdb9 /src/udev | |
| parent | 70b65964d7ef03621f5d4abd23150c1b121989b4 (diff) | |
path_id: reintroduce by-path links for virtio block devices
Enumeration of virtio buses is global and hence
non-deterministic. However, we are guaranteed there is never going to be
more than one virtio bus per parent PCI device. While populating
ID_PATH we simply skip virtio part of the syspath and we extend the path
using the sysname of the parent PCI device.
With this patch udev creates following by-path links for virtio-blk
device /dev/vda which contains two partitions.
ls -l /dev/disk/by-path/
total 0
lrwxrwxrwx 1 root root 9 Feb 9 10:47 virtio-pci-0000:00:05.0 -> ../../vda
lrwxrwxrwx 1 root root 10 Feb 9 10:47 virtio-pci-0000:00:05.0-part1 -> ../../vda1
lrwxrwxrwx 1 root root 10 Feb 9 10:47 virtio-pci-0000:00:05.0-part2 -> ../../vda2
See:
http://lists.linuxfoundation.org/pipermail/virtualization/2015-August/030328.html
Fixes #2501
Diffstat (limited to 'src/udev')
| -rw-r--r-- | src/udev/udev-builtin-path_id.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-path_id.c b/src/udev/udev-builtin-path_id.c index 7851cec17f..44fb5334b3 100644 --- a/src/udev/udev-builtin-path_id.c +++ b/src/udev/udev-builtin-path_id.c @@ -665,6 +665,12 @@ static int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool path_prepend(&path, "xen-%s", udev_device_get_sysname(parent)); parent = skip_subsystem(parent, "xen"); supported_parent = true; + } else if (streq(subsys, "virtio")) { + while (parent && streq_ptr("virtio", udev_device_get_subsystem(parent))) + parent = udev_device_get_parent(parent); + path_prepend(&path, "virtio-pci-%s", udev_device_get_sysname(parent)); + supported_transport = true; + supported_parent = true; } else if (streq(subsys, "scm")) { path_prepend(&path, "scm-%s", udev_device_get_sysname(parent)); parent = skip_subsystem(parent, "scm"); |