45 lines
2.1 KiB
Diff
45 lines
2.1 KiB
Diff
From 3d1922335f63c10b50527f210c05e039a51f69de Mon Sep 17 00:00:00 2001
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From: George McCollister <george.mccollister@gmail.com>
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Date: Thu, 25 May 2017 21:13:50 -0500
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Subject: [PATCH] rules: Handle MMC boot partitions by-path correctly (#6026)
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Many eMMC devices have separate boot partitions that aren't part of the
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normal partition table that show up as /dev/mmcblk[0-9]boot[0-9]. These
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partitions are generally small (128KB to 16MB) and typically hold a boot
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loader, boot loader data or a recovery image. Match these and create
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-boot%n by-path symlinks.
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Prior to this change by-path symlinks for the main device would be
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incorrectly linked to one of the boot partitions.
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For instance before:
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/dev/disk/by-path/platform-219c000.usdhc linked to /dev/mmcblk1boot1
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Now:
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/dev/disk/by-path/platform-219c000.usdhc links to /dev/mmcblk1
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/dev/disk/by-path/platform-219c000.usdhc-boot0 links to /dev/mmcblk1boot0
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/dev/disk/by-path/platform-219c000.usdhc-boot1 links to /dev/mmcblk1boot1
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On systems that support multiple SD/MMC devices it can be essential to
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have by-path links to these devices since device names vary depending on
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which other devices are connected.
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(cherry picked from commit 4e3f07029ad7b86773ce85db422bbce95ac578cf)
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---
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rules/60-persistent-storage.rules | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/rules/60-persistent-storage.rules b/rules/60-persistent-storage.rules
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index 9817e9c64b..d2745f65f4 100644
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--- a/rules/60-persistent-storage.rules
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+++ b/rules/60-persistent-storage.rules
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@@ -64,7 +64,8 @@ KERNEL=="msblk[0-9]p[0-9]|mspblk[0-9]p[0-9]", ENV{ID_NAME}=="?*", ENV{ID_SERIAL}
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# by-path
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ENV{DEVTYPE}=="disk", DEVPATH!="*/virtual/*", IMPORT{builtin}="path_id"
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-ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}"
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+KERNEL=="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}-boot%n"
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+KERNEL!="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}"
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ENV{DEVTYPE}=="partition", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}-part%n"
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# legacy virtio-pci by-path links (deprecated)
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