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| author | Matthias Badaire <mbadaire@gmail.com> | 2018-05-16 00:07:37 +0200 |
|---|---|---|
| committer | Jo-Philipp Wich <jo@mein.io> | 2019-06-21 14:17:22 +0200 |
| commit | fc39d5fc4500c512bd7e0427000f72b324486e5e (patch) | |
| tree | 6ce05446e9b9e9e6bcd30d5e88fa3090c40a9726 /package/system/fstools/files/media-change.hotplug | |
| parent | b463a13881d3699c0f2d67ceeda146c76af58ac6 (diff) | |
| download | upstream-fc39d5fc4500c512bd7e0427000f72b324486e5e.tar.gz upstream-fc39d5fc4500c512bd7e0427000f72b324486e5e.tar.bz2 upstream-fc39d5fc4500c512bd7e0427000f72b324486e5e.zip | |
fstools: media change detection (eg:sdcard) using kernel polling
Linux kernel has a polling mechanism that can be activated by changing
the parameter /sys/module/block/parameters/events_dfl_poll_msecs which
is deactivated by default or the /sys/block/[device]/events_poll_msecs
for one device.
This patch set the events_poll_msecs when a disk is inserted.
Once the media disk change event is sent by the kernel then we force a
re-read of the devices using /sbin/block info.
With this patch, insertion and ejection of sd card will automatically
generate partition devices in /dev.
Signed-off-by: Matthias Badaire <mbadaire@gmail.com>
[rewrap commit message, fix bashisms, fix non-matching condition,
bump pkg release]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
(cherry picked from commit cf8483cb4ffc99bf3f512bb134860ccc8c099abe)
Diffstat (limited to 'package/system/fstools/files/media-change.hotplug')
| -rw-r--r-- | package/system/fstools/files/media-change.hotplug | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/package/system/fstools/files/media-change.hotplug b/package/system/fstools/files/media-change.hotplug new file mode 100644 index 0000000000..30fc3d5c4f --- /dev/null +++ b/package/system/fstools/files/media-change.hotplug @@ -0,0 +1,8 @@ +[ -n "$DISK_MEDIA_CHANGE" ] && /sbin/block info + +if [ "$ACTION" = "add" -a "$DEVTYPE" = "disk" ]; then + case "$DEVNAME" in + mtd*) : ;; + *) echo 2000 > /sys/block/$DEVNAME/events_poll_msecs ;; + esac +fi |