diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2008-10-01 03:38:39 -0400 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:21 +0200 |
| commit | ad7fce93147d32ae53d25d9ea1a8ba31a239deee (patch) | |
| tree | baa8c613c1d34ec247f13b860c3bf7671b07f586 | |
| parent | 0c032ab889e7b20b8a5a7d09313e4aca214a15f7 (diff) | |
block: Switch blk_integrity_compare from bdev to gendisk
The DM and MD integrity support now depends on being able to use
gendisks instead of block_devices when comparing integrity profiles.
Change function parameters accordingly.
Also update comparison logic so that two NULL profiles are a valid
configuration.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| -rw-r--r-- | block/blk-integrity.c | 28 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 2 |
2 files changed, 15 insertions, 15 deletions
diff --git a/block/blk-integrity.c b/block/blk-integrity.c index e3817a016a1..61a8e2f8fdd 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -108,51 +108,51 @@ new_segment: EXPORT_SYMBOL(blk_rq_map_integrity_sg); /** - * blk_integrity_compare - Compare integrity profile of two block devices - * @bd1: Device to compare - * @bd2: Device to compare + * blk_integrity_compare - Compare integrity profile of two disks + * @gd1: Disk to compare + * @gd2: Disk to compare * * Description: Meta-devices like DM and MD need to verify that all * sub-devices use the same integrity format before advertising to * upper layers that they can send/receive integrity metadata. This - * function can be used to check whether two block devices have + * function can be used to check whether two gendisk devices have * compatible integrity formats. */ -int blk_integrity_compare(struct block_device *bd1, struct block_device *bd2) +int blk_integrity_compare(struct gendisk *gd1, struct gendisk *gd2) { - struct blk_integrity *b1 = bd1->bd_disk->integrity; - struct blk_integrity *b2 = bd2->bd_disk->integrity; + struct blk_integrity *b1 = gd1->integrity; + struct blk_integrity *b2 = gd2->integrity; - BUG_ON(bd1->bd_disk == NULL); - BUG_ON(bd2->bd_disk == NULL); + if (!b1 && !b2) + return 0; if (!b1 || !b2) - return 0; + return -1; if (b1->sector_size != b2->sector_size) { printk(KERN_ERR "%s: %s/%s sector sz %u != %u\n", __func__, - bd1->bd_disk->disk_name, bd2->bd_disk->disk_name, + gd1->disk_name, gd2->disk_name, b1->sector_size, b2->sector_size); return -1; } if (b1->tuple_size != b2->tuple_size) { printk(KERN_ERR "%s: %s/%s tuple sz %u != %u\n", __func__, - bd1->bd_disk->disk_name, bd2->bd_disk->disk_name, + gd1->disk_name, gd2->disk_name, b1->tuple_size, b2->tuple_size); return -1; } if (b1->tag_size && b2->tag_size && (b1->tag_size != b2->tag_size)) { printk(KERN_ERR "%s: %s/%s tag sz %u != %u\n", __func__, - bd1->bd_disk->disk_name, bd2->bd_disk->disk_name, + gd1->disk_name, gd2->disk_name, b1->tag_size, b2->tag_size); return -1; } if (strcmp(b1->name, b2->name)) { printk(KERN_ERR "%s: %s/%s type %s != %s\n", __func__, - bd1->bd_disk->disk_name, bd2->bd_disk->disk_name, + gd1->disk_name, gd2->disk_name, b1->name, b2->name); return -1; } diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index bc693f5c388..00d340b0f75 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1012,7 +1012,7 @@ struct blk_integrity { extern int blk_integrity_register(struct gendisk *, struct blk_integrity *); extern void blk_integrity_unregister(struct gendisk *); -extern int blk_integrity_compare(struct block_device *, struct block_device *); +extern int blk_integrity_compare(struct gendisk *, struct gendisk *); extern int blk_rq_map_integrity_sg(struct request *, struct scatterlist *); extern int blk_rq_count_integrity_sg(struct request *); |