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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 | |
| 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)
| -rw-r--r-- | package/system/fstools/Makefile | 3 | ||||
| -rw-r--r-- | package/system/fstools/files/media-change.hotplug | 8 |
2 files changed, 10 insertions, 1 deletions
diff --git a/package/system/fstools/Makefile b/package/system/fstools/Makefile index 58be215f8f..60ccf09e11 100644 --- a/package/system/fstools/Makefile +++ b/package/system/fstools/Makefile @@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk PKG_NAME:=fstools -PKG_RELEASE:=3 +PKG_RELEASE:=4 PKG_SOURCE_PROTO:=git PKG_SOURCE_URL=$(PROJECT_GIT)/project/fstools.git @@ -110,6 +110,7 @@ define Package/block-mount/install $(INSTALL_BIN) ./files/fstab.init $(1)/etc/init.d/fstab $(INSTALL_CONF) ./files/fstab.default $(1)/etc/uci-defaults/10-fstab $(INSTALL_CONF) ./files/mount.hotplug $(1)/etc/hotplug.d/block/10-mount + $(INSTALL_CONF) ./files/media-change.hotplug $(1)/etc/hotplug.d/block/00-media-change $(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/block $(1)/sbin/ $(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/libblkid-tiny.so $(1)/lib/ diff --git a/package/system/fstools/files/media-change.hotplug b/package/system/fstools/files/media-change.hotplug new file mode 100644 index 0000000000..30fc3d5c4f --- /dev/null +++ b/package/system/fstools/files/media-change.hotplug @@ -0,0 +1,8 @@ +[ -n "$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 |