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authorDan Williams <dan.j.williams@intel.com>2015-10-21 13:20:18 -0400
committerJens Axboe <axboe@fb.com>2015-10-21 14:43:42 -0600
commitac6fc48c9fb7d3220ec4e0be0c29bb314ea75f9f (patch)
treeb9f2aed362449db3f27c233202eb08d5267c5812 /block/blk-integrity.c
parent3ef28e83ab15799742e55fd13243a5f678b04242 (diff)
downloadlinux-stericsson-ac6fc48c9fb7d3220ec4e0be0c29bb314ea75f9f.tar.gz
block: move blk_integrity to request_queue
A trace like the following proceeds a crash in bio_integrity_process() when it goes to use an already freed blk_integrity profile. BUG: unable to handle kernel paging request at ffff8800d31b10d8 IP: [<ffff8800d31b10d8>] 0xffff8800d31b10d8 PGD 2f65067 PUD 21fffd067 PMD 80000000d30001e3 Oops: 0011 [#1] SMP Dumping ftrace buffer: --------------------------------- ndctl-2222 2.... 44526245us : disk_release: pmem1s systemd--2223 4.... 44573945us : bio_integrity_endio: pmem1s <...>-409 4.... 44574005us : bio_integrity_process: pmem1s --------------------------------- [..] Call Trace: [<ffffffff8144e0f9>] ? bio_integrity_process+0x159/0x2d0 [<ffffffff8144e4f6>] bio_integrity_verify_fn+0x36/0x60 [<ffffffff810bd2dc>] process_one_work+0x1cc/0x4e0 Given that a request_queue is pinned while i/o is in flight and that a gendisk is allowed to have a shorter lifetime, move blk_integrity to request_queue to satisfy requests arriving after the gendisk has been torn down. Cc: Christoph Hellwig <hch@lst.de> Cc: Martin K. Petersen <martin.petersen@oracle.com> [martin: fix the CONFIG_BLK_DEV_INTEGRITY=n case] Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-integrity.c')
-rw-r--r--block/blk-integrity.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index 4615a3386798..5d339ae64d56 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -142,8 +142,8 @@ EXPORT_SYMBOL(blk_rq_map_integrity_sg);
*/
int blk_integrity_compare(struct gendisk *gd1, struct gendisk *gd2)
{
- struct blk_integrity *b1 = &gd1->integrity;
- struct blk_integrity *b2 = &gd2->integrity;
+ struct blk_integrity *b1 = &gd1->queue->integrity;
+ struct blk_integrity *b2 = &gd2->queue->integrity;
if (!b1->profile && !b2->profile)
return 0;
@@ -246,7 +246,7 @@ static ssize_t integrity_attr_show(struct kobject *kobj, struct attribute *attr,
char *page)
{
struct gendisk *disk = container_of(kobj, struct gendisk, integrity_kobj);
- struct blk_integrity *bi = &disk->integrity;
+ struct blk_integrity *bi = &disk->queue->integrity;
struct integrity_sysfs_entry *entry =
container_of(attr, struct integrity_sysfs_entry, attr);
@@ -258,7 +258,7 @@ static ssize_t integrity_attr_store(struct kobject *kobj,
size_t count)
{
struct gendisk *disk = container_of(kobj, struct gendisk, integrity_kobj);
- struct blk_integrity *bi = &disk->integrity;
+ struct blk_integrity *bi = &disk->queue->integrity;
struct integrity_sysfs_entry *entry =
container_of(attr, struct integrity_sysfs_entry, attr);
ssize_t ret = 0;
@@ -397,7 +397,7 @@ static struct kobj_type integrity_ktype = {
*/
void blk_integrity_register(struct gendisk *disk, struct blk_integrity *template)
{
- struct blk_integrity *bi = &disk->integrity;
+ struct blk_integrity *bi = &disk->queue->integrity;
bi->flags = BLK_INTEGRITY_VERIFY | BLK_INTEGRITY_GENERATE |
template->flags;
@@ -420,13 +420,13 @@ EXPORT_SYMBOL(blk_integrity_register);
void blk_integrity_unregister(struct gendisk *disk)
{
blk_integrity_revalidate(disk);
- memset(&disk->integrity, 0, sizeof(struct blk_integrity));
+ memset(&disk->queue->integrity, 0, sizeof(struct blk_integrity));
}
EXPORT_SYMBOL(blk_integrity_unregister);
void blk_integrity_revalidate(struct gendisk *disk)
{
- struct blk_integrity *bi = &disk->integrity;
+ struct blk_integrity *bi = &disk->queue->integrity;
if (!(disk->flags & GENHD_FL_UP))
return;