These patches include a few enhancements to ses module:
1: close potential race condition by at enclosure race condition
2,3,4: add enclosure id and device slot, so we can create symlink
in /dev/disk/by-slot:
# ls -d /dev/disk/by-slot/*
/dev/disk/by-slot/enclosure-0x5000ae41fc1310ff-slot0
5: add ability to power on/off device with power_status file in
sysfs.
Due to the complexity of SES standard, the module is not to replace implement all features (which is the goal of sg_ses from sg3_utils). Patch 5 and existing features for device element and array device elements control of HDDs. It is helpful to handle some HDD related fields in the kernel, as the kernel can generate mapping between a device to the SES device element (or array device element):
/sys/block/sdc/device/enclosure_deviceXXX/
With patch 5, we can easily power off a running HDD by
echo off > /sys/block/sdc/device/enclosure_deviceXXX/power_status
This is very useful for systems like Cold Storage, where HDDs are being powered \ on/off frequently
Dan Williams (4):
SES: close potential registration race
SES: generate KOBJ_CHANGE on enclosure attach
SES: add enclosure logical id
SES: add reliable slot attribute
Song Liu (1):
SES: Add power_status to SES enclosure component
drivers/misc/enclosure.c | 107 +++++++++++++++++++++++++++++----
drivers/scsi/ses.c | 148 +++++++++++++++++++++++++++++++++++++++-------
include/linux/enclosure.h | 13 +++-
3 files changed, 232 insertions(+), 36 deletions(-)
--
1.8.1
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