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mtd: blktrans: allow FTL drivers to export sysfs attributes

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This patch adds an ability to export sysfs attributes below
the block disk device.

This can be used to pass the udev an information about the FTL
and could include the vendor, serial, version, etc...

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Maxim Levitsky 2010-02-22 20:39:33 +02:00 committed by David Woodhouse
parent 75c0b84d41
commit 026ec57886
2 changed files with 10 additions and 0 deletions
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8
drivers/mtd/mtd_blkdevs.c
View file

@ -379,6 +379,10 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
set_disk_ro(gd, 1);
add_disk(gd);
if (new->disk_attributes)
sysfs_create_group(&disk_to_dev(gd)->kobj,
new->disk_attributes);
return 0;
error4:
module_put(tr->owner);
@ -405,6 +409,10 @@ int del_mtd_blktrans_dev(struct mtd_blktrans_dev *old)
/* Stop new requests to arrive */
del_gendisk(old->disk);
if (old->disk_attributes)
sysfs_remove_group(&disk_to_dev(old->disk)->kobj,
old->disk_attributes);
/* Stop the thread */
kthread_stop(old->thread);

2
include/linux/mtd/blktrans.h
View file

@ -10,6 +10,7 @@
#include <linux/mutex.h>
#include <linux/kref.h>
#include <linux/sysfs.h>
struct hd_geometry;
struct mtd_info;
@ -28,6 +29,7 @@ struct mtd_blktrans_dev {
int open;
struct kref ref;
struct gendisk *disk;
struct attribute_group *disk_attributes;
struct task_struct *thread;
struct request_queue *rq;
spinlock_t queue_lock;