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authorMartin K. Petersen <martin.petersen@oracle.com>2015-10-21 13:19:49 -0400
committerJens Axboe <axboe@fb.com>2015-10-21 14:42:42 -0600
commit25520d55cdb6ee289abc68f553d364d22478ff54 (patch)
tree84e447f762e7f60095d0c4d24fdf2d9440f4b06d /block/genhd.c
parent4c241d08dbfcbdc7a949b91d72707a289d464954 (diff)
downloadlinux-25520d55cdb6ee289abc68f553d364d22478ff54.tar.bz2
block: Inline blk_integrity in struct gendisk
Up until now the_integrity profile has been dynamically allocated and attached to struct gendisk after the disk has been made active. This causes problems because NVMe devices need to register the profile prior to the partition table being read due to a mandatory metadata buffer requirement. In addition, DM goes through hoops to deal with preallocating, but not initializing integrity profiles. Since the integrity profile is small (4 bytes + a pointer), Christoph suggested moving it to struct gendisk proper. This requires several changes: - Moving the blk_integrity definition to genhd.h. - Inlining blk_integrity in struct gendisk. - Removing the dynamic allocation code. - Adding helper functions which allow gendisk to set up and tear down the integrity sysfs dir when a disk is added/deleted. - Adding a blk_integrity_revalidate() callback for updating the stable pages bdi setting. - The calls that depend on whether a device has an integrity profile or not now key off of the bi->profile pointer. - Simplifying the integrity support routines in DM (Mike Snitzer). Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Reported-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/genhd.c')
-rw-r--r--block/genhd.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 0c706f33a599..e5cafa51567c 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -630,6 +630,7 @@ void add_disk(struct gendisk *disk)
WARN_ON(retval);
disk_add_events(disk);
+ blk_integrity_add(disk);
}
EXPORT_SYMBOL(add_disk);
@@ -638,6 +639,7 @@ void del_gendisk(struct gendisk *disk)
struct disk_part_iter piter;
struct hd_struct *part;
+ blk_integrity_del(disk);
disk_del_events(disk);
/* invalidate stuff */