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allow userspace to modify scsi command filter on per device basis

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This patch exports the per-gendisk command filter to user space through
sysfs, so it can be changed by the system administrator.
All users of the old cmd filter have been converted to use the new one.

Original patch from Peter Jones.

Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com>
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Adel Gadllah 2008-06-26 13:48:27 +02:00 • committed by Jens Axboe
parent 6e2401ad6f
commit 0b07de85a7
8 changed files with 389 additions and 159 deletions
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10
include/linux/blkdev.h
View file

@ -671,7 +671,6 @@ extern int blk_execute_rq(struct request_queue *, struct gendisk *,
struct request *, int);
extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
struct request *, int, rq_end_io_fn *);
extern int blk_verify_command(unsigned char *, int);
extern void blk_unplug(struct request_queue *q);
static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
@ -797,6 +796,15 @@ static inline struct request *blk_map_queue_find_tag(struct blk_queue_tag *bqt,
extern int blkdev_issue_flush(struct block_device *, sector_t *);
/*
* command filter functions
*/
extern int blk_verify_command(struct file *file, unsigned char *cmd);
extern int blk_cmd_filter_verify_command(struct blk_scsi_cmd_filter *filter,
unsigned char *cmd, mode_t *f_mode);
extern int blk_register_filter(struct gendisk *disk);
extern void blk_unregister_filter(struct gendisk *disk);
#define MAX_PHYS_SEGMENTS 128
#define MAX_HW_SEGMENTS 128
#define SAFE_MAX_SECTORS 255