You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
2.2 KiB
49 lines
2.2 KiB
7 years ago
|
From b6fea1a0e0fd830e1aa82accf389cb8bfd0f0f37 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Michal Sekletar <msekleta@redhat.com>
|
||
|
|
Date: Tue, 9 Feb 2016 09:57:45 +0100
|
||
|
|
Subject: [PATCH] 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
|
||
|
|
|
||
|
|
Cherry-picked from: f073b1b3c0f4f0df1b0bd61042ce85fb5d27d407
|
||
|
|
Resolves: #952567
|
||
|
|
---
|
||
|
|
src/udev/udev-builtin-path_id.c | 6 ++++++
|
||
|
|
1 file changed, 6 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/src/udev/udev-builtin-path_id.c b/src/udev/udev-builtin-path_id.c
|
||
|
|
index 3b72922d4..8359e236a 100644
|
||
|
|
--- a/src/udev/udev-builtin-path_id.c
|
||
|
|
+++ b/src/udev/udev-builtin-path_id.c
|
||
|
|
@@ -698,6 +698,12 @@ restart:
|
||
|
|
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");
|