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Commit a015d33c authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.dk/linux-block 

Pull block layer fixes from Jens Axboe:
 "Two smaller fixes for this cycle:

   - A fixup from Keith so that NVMe compiles without BLK_INTEGRITY,
     basically just moving the code around appropriately.

   - A fixup for shm, fixing an oops in shmem_mapping() for mapping with
     no inode.  From Sasha"

[ The shmem fix doesn't look block-layer-related, but fixes a bug that
  happened due to the backing_dev_info removal..  - Linus ]

* 'for-linus' of git://git.kernel.dk/linux-block:
  mm: shmem: check for mapping owner before dereferencing
  NVMe: Fix for BLK_DEV_INTEGRITY not set
parents 2aaeb784 f0774d88

drivers/block/nvme-core.c

+58 −41
Original line number Diff line number Diff line
@@ -482,6 +482,7 @@ static int nvme_error_status(u16 status) 
	}

}



#ifdef CONFIG_BLK_DEV_INTEGRITY

static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi)

{

	if (be32_to_cpu(pi->ref_tag) == v)
@@ -538,6 +539,58 @@ static void nvme_dif_remap(struct request *req, 
	kunmap_atomic(pmap);

}



static int nvme_noop_verify(struct blk_integrity_iter *iter)

{

	return 0;

}



static int nvme_noop_generate(struct blk_integrity_iter *iter)

{

	return 0;

}



struct blk_integrity nvme_meta_noop = {

	.name			= "NVME_META_NOOP",

	.generate_fn		= nvme_noop_generate,

	.verify_fn		= nvme_noop_verify,

};



static void nvme_init_integrity(struct nvme_ns *ns)

{

	struct blk_integrity integrity;



	switch (ns->pi_type) {

	case NVME_NS_DPS_PI_TYPE3:

		integrity = t10_pi_type3_crc;

		break;

	case NVME_NS_DPS_PI_TYPE1:

	case NVME_NS_DPS_PI_TYPE2:

		integrity = t10_pi_type1_crc;

		break;

	default:

		integrity = nvme_meta_noop;

		break;

	}

	integrity.tuple_size = ns->ms;

	blk_integrity_register(ns->disk, &integrity);

	blk_queue_max_integrity_segments(ns->queue, 1);

}

#else /* CONFIG_BLK_DEV_INTEGRITY */

static void nvme_dif_remap(struct request *req,

			void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi))

{

}

static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi)

{

}

static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi)

{

}

static void nvme_init_integrity(struct nvme_ns *ns)

{

}

#endif



static void req_completion(struct nvme_queue *nvmeq, void *ctx,

						struct nvme_completion *cqe)

{
@@ -1959,43 +2012,6 @@ static void nvme_config_discard(struct nvme_ns *ns) 
	queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue);

}



static int nvme_noop_verify(struct blk_integrity_iter *iter)

{

	return 0;

}



static int nvme_noop_generate(struct blk_integrity_iter *iter)

{

	return 0;

}



struct blk_integrity nvme_meta_noop = {

	.name			= "NVME_META_NOOP",

	.generate_fn		= nvme_noop_generate,

	.verify_fn		= nvme_noop_verify,

};



static void nvme_init_integrity(struct nvme_ns *ns)

{

	struct blk_integrity integrity;



	switch (ns->pi_type) {

	case NVME_NS_DPS_PI_TYPE3:

		integrity = t10_pi_type3_crc;

		break;

	case NVME_NS_DPS_PI_TYPE1:

	case NVME_NS_DPS_PI_TYPE2:

		integrity = t10_pi_type1_crc;

		break;

	default:

		integrity = nvme_meta_noop;

		break;

	}

	integrity.tuple_size = ns->ms;

	blk_integrity_register(ns->disk, &integrity);

	blk_queue_max_integrity_segments(ns->queue, 1);

}



static int nvme_revalidate_disk(struct gendisk *disk)

{

	struct nvme_ns *ns = disk->private_data;
@@ -2036,7 +2052,8 @@ static int nvme_revalidate_disk(struct gendisk *disk) 
	pi_type = ns->ms == sizeof(struct t10_pi_tuple) ?

					id->dps & NVME_NS_DPS_PI_MASK : 0;



	if (disk->integrity && (ns->pi_type != pi_type || ns->ms != old_ms ||

	if (blk_get_integrity(disk) && (ns->pi_type != pi_type ||

				ns->ms != old_ms ||

				bs != queue_logical_block_size(disk->queue) ||

				(ns->ms && id->flbas & NVME_NS_FLBAS_META_EXT)))

		blk_integrity_unregister(disk);
@@ -2044,11 +2061,11 @@ static int nvme_revalidate_disk(struct gendisk *disk) 
	ns->pi_type = pi_type;

	blk_queue_logical_block_size(ns->queue, bs);



	if (ns->ms && !disk->integrity && (disk->flags & GENHD_FL_UP) &&

	if (ns->ms && !blk_get_integrity(disk) && (disk->flags & GENHD_FL_UP) &&

				!(id->flbas & NVME_NS_FLBAS_META_EXT))

		nvme_init_integrity(ns);



	if (id->ncap == 0 || (ns->ms && !disk->integrity))

	if (id->ncap == 0 || (ns->ms && !blk_get_integrity(disk)))

		set_capacity(disk, 0);

	else

		set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9));
@@ -2652,7 +2669,7 @@ static void nvme_dev_remove(struct nvme_dev *dev) 


	list_for_each_entry(ns, &dev->namespaces, list) {

		if (ns->disk->flags & GENHD_FL_UP) {

			if (ns->disk->integrity)

			if (blk_get_integrity(ns->disk))

				blk_integrity_unregister(ns->disk);

			del_gendisk(ns->disk);

		}

mm/shmem.c

+3 −0
Original line number Diff line number Diff line
@@ -1455,6 +1455,9 @@ static struct inode *shmem_get_inode(struct super_block *sb, const struct inode 


bool shmem_mapping(struct address_space *mapping)

{

	if (!mapping->host)

		return false;



	return mapping->host->i_sb->s_op == &shmem_ops;

}