From: Dan Williams <djbw@xxxxxx>
sysfs deprecated makes forwarding udev events from a scsi device to its
block device difficult. Provide a workalike for the udev rule:
ACTION=="change", SUBSYSTEM=="scsi", ENV{DEVTYPE}=="scsi_device", \
TEST=="block", ATTR{block/*/uevent}="change"
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Song Liu <songliubraving@xxxxxx>
---
Makefile | 17 +++++++++++++++--
forward-scsi-uevents | 14 ++++++++++++++
...enclosure-slot.rules => udev-enclosure-slot.rules.in | 2 --
udev-workaround-sysfs-deprecated.in | 2 ++
4 files changed, 31 insertions(+), 4 deletions(-)
create mode 100755 forward-scsi-uevents
rename udev-enclosure-slot.rules => udev-enclosure-slot.rules.in (87%)
create mode 100644 udev-workaround-sysfs-deprecated.in
diff --git a/Makefile b/Makefile
index 4eb2dad..2963884 100644
--- a/Makefile
+++ b/Makefile
@@ -292,7 +292,17 @@ install-man: mdadm.8 md.4 mdadm.conf.5 mdmon.8
$(INSTALL) -D -m 644 md.4 $(DESTDIR)$(MAN4DIR)/md.4
$(INSTALL) -D -m 644 mdadm.conf.5 $(DESTDIR)$(MAN5DIR)/mdadm.conf.5
-install-udev: udev-md-raid-arrays.rules udev-md-raid-assembly.rules
+udev-enclosure-slot.rules: udev-enclosure-slot.rules.in udev-workaround-sysfs-deprecated.in Makefile
+ @echo "$@: generate"
+ @/bin/echo -e "# do not edit this file, it will be overwritten on update\n" > $@
+ @if [ ! -d /sys/class/block ]; then \
+ echo "$@: applying sysfs-deprecated workaround"; \
+ cat udev-workaround-sysfs-deprecated.in >> $@; \
+ fi
+ @cat udev-enclosure-slot.rules.in >> $@
+
+install-udev: udev-md-raid-arrays.rules udev-md-raid-assembly.rules udev-enclosure-slot.rules \
+ forward-scsi-uevents
$(INSTALL) -D -m 655 ses_slot_id $(DESTDIR)$(LIBDIR)/ses_slot_id
$(INSTALL) -D -m 644 udev-enclosure-slot.rules $(DESTDIR)$(UDEVDIR)/rules.d/62-md-enclosure-slot.rules
@for file in 63-md-raid-arrays.rules 64-md-raid-assembly.rules ; \
@@ -301,6 +311,9 @@ install-udev: udev-md-raid-arrays.rules udev-md-raid-assembly.rules
$(INSTALL) -D -m 644 .install.tmp.1 $(DESTDIR)$(UDEVDIR)/rules.d/$$file ; \
rm -f .install.tmp.1; \
done
+ @if [ ! -d /sys/class/block ]; then \
+ $(INSTALL) -D -m 655 forward-scsi-uevents $(DESTDIR)$(UDEVDIR)/forward-scsi-uevents; \
+ fi
install-systemd: systemd/mdmon@.service
@for file in mdmon@.service mdmonitor.service mdadm-last-resort@.timer \
@@ -331,7 +344,7 @@ clean :
mdassemble mdassemble.static mdassemble.auto mdassemble.uclibc \
mdassemble.klibc swap_super \
init.cpio.gz mdadm.uclibc.static test_stripe raid6check raid6check.o mdmon \
- mdadm.8
+ mdadm.8 udev-enclosure-slot.rules
dist : clean
./makedist
diff --git a/forward-scsi-uevents b/forward-scsi-uevents
new file mode 100755
index 0000000..d43687f
--- /dev/null
+++ b/forward-scsi-uevents
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# on sysfs-deprecated hosts the default udev rules are unable to forward
+# udev events to the block device, this is a hack to enable this
+# forwarding by searching for the matching device path
+
+for i in /sys/block/sd*
+do
+ DEV=$(readlink -f $i/device)
+ if [ $DEV = /sys$1 ]; then
+ echo "change" > $i/uevent
+ break
+ fi
+done
diff --git a/udev-enclosure-slot.rules b/udev-enclosure-slot.rules.in
similarity index 87%
rename from udev-enclosure-slot.rules
rename to udev-enclosure-slot.rules.in
index 75c6376..50e3c45 100644
--- a/udev-enclosure-slot.rules
+++ b/udev-enclosure-slot.rules.in
@@ -1,5 +1,3 @@
-# do not edit this file, it will be overwritten on update
-
SUBSYSTEM!="block", GOTO="ses_slot_end"
ACTION!="add|change", GOTO="ses_slot_end"
diff --git a/udev-workaround-sysfs-deprecated.in b/udev-workaround-sysfs-deprecated.in
new file mode 100644
index 0000000..65a21b3
--- /dev/null
+++ b/udev-workaround-sysfs-deprecated.in
@@ -0,0 +1,2 @@
+ACTION=="change", SUBSYSTEM=="scsi", ENV{DEVTYPE}=="scsi_device", TEST=="scsi_disk", RUN="forward-scsi-uevents %p"
+
--
2.4.6
--
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