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block: Fix secure erase

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Commit 288dab8a35 ("block: add a separate operation type for secure
erase") split REQ_OP_SECURE_ERASE from REQ_OP_DISCARD without considering
all the places REQ_OP_DISCARD was being used to mean either. Fix those.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: 288dab8a35 ("block: add a separate operation type for secure erase")
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Adrian Hunter 2016-08-16 10:59:35 +03:00 committed by Jens Axboe
parent f6b6a28e2d
commit 7afafc8a44
9 changed files with 50 additions and 32 deletions
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21
block/bio.c
View File

@ -667,18 +667,19 @@ struct bio *bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
bio->bi_iter.bi_sector = bio_src->bi_iter.bi_sector;
bio->bi_iter.bi_size = bio_src->bi_iter.bi_size;
if (bio_op(bio) == REQ_OP_DISCARD)
goto integrity_clone;
if (bio_op(bio) == REQ_OP_WRITE_SAME) {
switch (bio_op(bio)) {
case REQ_OP_DISCARD:
case REQ_OP_SECURE_ERASE:
break;
case REQ_OP_WRITE_SAME:
bio->bi_io_vec[bio->bi_vcnt++] = bio_src->bi_io_vec[0];
goto integrity_clone;
break;
default:
bio_for_each_segment(bv, bio_src, iter)
bio->bi_io_vec[bio->bi_vcnt++] = bv;
break;
}
bio_for_each_segment(bv, bio_src, iter)
bio->bi_io_vec[bio->bi_vcnt++] = bv;
integrity_clone:
if (bio_integrity(bio_src)) {
int ret;
@ -1788,7 +1789,7 @@ struct bio *bio_split(struct bio *bio, int sectors,
* Discards need a mutable bio_vec to accommodate the payload
* required by the DSM TRIM and UNMAP commands.
*/
if (bio_op(bio) == REQ_OP_DISCARD)
if (bio_op(bio) == REQ_OP_DISCARD || bio_op(bio) == REQ_OP_SECURE_ERASE)
split = bio_clone_bioset(bio, gfp, bs);
else
split = bio_clone_fast(bio, gfp, bs);

33
block/blk-merge.c
View File

@ -172,12 +172,18 @@ void blk_queue_split(struct request_queue *q, struct bio **bio,
struct bio *split, *res;
unsigned nsegs;
if (bio_op(*bio) == REQ_OP_DISCARD)
switch (bio_op(*bio)) {
case REQ_OP_DISCARD:
case REQ_OP_SECURE_ERASE:
split = blk_bio_discard_split(q, *bio, bs, &nsegs);
else if (bio_op(*bio) == REQ_OP_WRITE_SAME)
break;
case REQ_OP_WRITE_SAME:
split = blk_bio_write_same_split(q, *bio, bs, &nsegs);
else
break;
default:
split = blk_bio_segment_split(q, *bio, q->bio_split, &nsegs);
break;
}
/* physical segments can be figured out during splitting */
res = split ? split : *bio;
@ -213,7 +219,7 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
* This should probably be returning 0, but blk_add_request_payload()
* (Christoph!!!!)
*/
if (bio_op(bio) == REQ_OP_DISCARD)
if (bio_op(bio) == REQ_OP_DISCARD || bio_op(bio) == REQ_OP_SECURE_ERASE)
return 1;
if (bio_op(bio) == REQ_OP_WRITE_SAME)
@ -385,7 +391,9 @@ static int __blk_bios_map_sg(struct request_queue *q, struct bio *bio,
nsegs = 0;
cluster = blk_queue_cluster(q);
if (bio_op(bio) == REQ_OP_DISCARD) {
switch (bio_op(bio)) {
case REQ_OP_DISCARD:
case REQ_OP_SECURE_ERASE:
/*
* This is a hack - drivers should be neither modifying the
* biovec, nor relying on bi_vcnt - but because of
@ -393,19 +401,16 @@ static int __blk_bios_map_sg(struct request_queue *q, struct bio *bio,
* a payload we need to set up here (thank you Christoph) and
* bi_vcnt is really the only way of telling if we need to.
*/
if (bio->bi_vcnt)
goto single_segment;
return 0;
}
if (bio_op(bio) == REQ_OP_WRITE_SAME) {
single_segment:
if (!bio->bi_vcnt)
return 0;
/* Fall through */
case REQ_OP_WRITE_SAME:
*sg = sglist;
bvec = bio_iovec(bio);
sg_set_page(*sg, bvec.bv_page, bvec.bv_len, bvec.bv_offset);
return 1;
default:
break;
}
for_each_bio(bio)

2
block/elevator.c
View File

@ -366,7 +366,7 @@ void elv_dispatch_sort(struct request_queue *q, struct request *rq)
list_for_each_prev(entry, &q->queue_head) {
struct request *pos = list_entry_rq(entry);
if ((req_op(rq) == REQ_OP_DISCARD) != (req_op(pos) == REQ_OP_DISCARD))
if (req_op(rq) != req_op(pos))
break;
if (rq_data_dir(rq) != rq_data_dir(pos))
break;

1
drivers/mmc/card/block.c
View File

@ -1726,6 +1726,7 @@ static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
break;
if (req_op(next) == REQ_OP_DISCARD ||
req_op(next) == REQ_OP_SECURE_ERASE ||
req_op(next) == REQ_OP_FLUSH)
break;

3
drivers/mmc/card/queue.c
View File

@ -33,7 +33,8 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
/*
* We only like normal block requests and discards.
*/
if (req->cmd_type != REQ_TYPE_FS && req_op(req) != REQ_OP_DISCARD) {
if (req->cmd_type != REQ_TYPE_FS && req_op(req) != REQ_OP_DISCARD &&
req_op(req) != REQ_OP_SECURE_ERASE) {
blk_dump_rq_flags(req, "MMC bad request");
return BLKPREP_KILL;
}

4
drivers/mmc/card/queue.h
View File

@ -4,7 +4,9 @@
static inline bool mmc_req_is_special(struct request *req)
{
return req &&
(req_op(req) == REQ_OP_FLUSH || req_op(req) == REQ_OP_DISCARD);
(req_op(req) == REQ_OP_FLUSH ||
req_op(req) == REQ_OP_DISCARD ||
req_op(req) == REQ_OP_SECURE_ERASE);
}
struct request;

10
include/linux/bio.h
View File

@ -71,7 +71,8 @@ static inline bool bio_has_data(struct bio *bio)
{
if (bio &&
bio->bi_iter.bi_size &&
bio_op(bio) != REQ_OP_DISCARD)
bio_op(bio) != REQ_OP_DISCARD &&
bio_op(bio) != REQ_OP_SECURE_ERASE)
return true;
return false;
@ -79,7 +80,9 @@ static inline bool bio_has_data(struct bio *bio)
static inline bool bio_no_advance_iter(struct bio *bio)
{
return bio_op(bio) == REQ_OP_DISCARD || bio_op(bio) == REQ_OP_WRITE_SAME;
return bio_op(bio) == REQ_OP_DISCARD ||
bio_op(bio) == REQ_OP_SECURE_ERASE ||
bio_op(bio) == REQ_OP_WRITE_SAME;
}
static inline bool bio_is_rw(struct bio *bio)
@ -199,6 +202,9 @@ static inline unsigned bio_segments(struct bio *bio)
if (bio_op(bio) == REQ_OP_DISCARD)
return 1;
if (bio_op(bio) == REQ_OP_SECURE_ERASE)
return 1;
if (bio_op(bio) == REQ_OP_WRITE_SAME)
return 1;

6
include/linux/blkdev.h
View File

@ -882,7 +882,7 @@ static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
int op)
{
if (unlikely(op == REQ_OP_DISCARD))
if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE))
return min(q->limits.max_discard_sectors, UINT_MAX >> 9);
if (unlikely(op == REQ_OP_WRITE_SAME))
@ -913,7 +913,9 @@ static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
if (unlikely(rq->cmd_type != REQ_TYPE_FS))
return q->limits.max_hw_sectors;
if (!q->limits.chunk_sectors || (req_op(rq) == REQ_OP_DISCARD))
if (!q->limits.chunk_sectors ||
req_op(rq) == REQ_OP_DISCARD ||
req_op(rq) == REQ_OP_SECURE_ERASE)
return blk_queue_get_max_sectors(q, req_op(rq));
return min(blk_max_size_offset(q, offset),

2
kernel/trace/blktrace.c
View File

@ -223,7 +223,7 @@ static void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
what |= MASK_TC_BIT(op_flags, META);
what |= MASK_TC_BIT(op_flags, PREFLUSH);
what |= MASK_TC_BIT(op_flags, FUA);
if (op == REQ_OP_DISCARD)
if (op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE)
what |= BLK_TC_ACT(BLK_TC_DISCARD);
if (op == REQ_OP_FLUSH)
what |= BLK_TC_ACT(BLK_TC_FLUSH);