From 288dab8a35a0bde426a09870943c8d3ee3a50dab Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 9 Jun 2016 16:00:36 +0200 Subject: [PATCH] block: add a separate operation type for secure erase Instead of overloading the discard support with the REQ_SECURE flag. Use the opportunity to rename the queue flag as well, and remove the dead checks for this flag in the RAID 1 and RAID 10 drivers that don't claim support for secure erase. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- block/blk-core.c | 27 +++++++++++++++++---------- block/blk-lib.c | 25 ++++++++++++++----------- block/blk-merge.c | 6 ++---- drivers/block/xen-blkback/xenbus.c | 2 +- drivers/block/xen-blkfront.c | 14 +++++++++----- drivers/md/raid1.c | 3 +-- drivers/md/raid10.c | 5 ++--- drivers/mmc/card/block.c | 10 ++++++---- drivers/mmc/card/queue.c | 2 +- include/linux/blk_types.h | 5 ++--- include/linux/blkdev.h | 23 ++++------------------- kernel/trace/blktrace.c | 6 ++++-- 12 files changed, 63 insertions(+), 65 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 32a283eb7274..db31a2981223 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1977,16 +1977,21 @@ generic_make_request_checks(struct bio *bio) } } - if ((bio_op(bio) == REQ_OP_DISCARD) && - (!blk_queue_discard(q) || - ((bio->bi_rw & REQ_SECURE) && !blk_queue_secdiscard(q)))) { - err = -EOPNOTSUPP; - goto end_io; - } - - if (bio_op(bio) == REQ_OP_WRITE_SAME && !bdev_write_same(bio->bi_bdev)) { - err = -EOPNOTSUPP; - goto end_io; + switch (bio_op(bio)) { + case REQ_OP_DISCARD: + if (!blk_queue_discard(q)) + goto not_supported; + break; + case REQ_OP_SECURE_ERASE: + if (!blk_queue_secure_erase(q)) + goto not_supported; + break; + case REQ_OP_WRITE_SAME: + if (!bdev_write_same(bio->bi_bdev)) + goto not_supported; + break; + default: + break; } /* @@ -2003,6 +2008,8 @@ generic_make_request_checks(struct bio *bio) trace_block_bio_queue(q, bio); return true; +not_supported: + err = -EOPNOTSUPP; end_io: bio->bi_error = err; bio_endio(bio); diff --git a/block/blk-lib.c b/block/blk-lib.c index ff2a7f04af4d..78626c2fde33 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -23,20 +23,27 @@ static struct bio *next_bio(struct bio *bio, unsigned int nr_pages, } int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, - sector_t nr_sects, gfp_t gfp_mask, int op_flags, + sector_t nr_sects, gfp_t gfp_mask, int flags, struct bio **biop) { struct request_queue *q = bdev_get_queue(bdev); struct bio *bio = *biop; unsigned int granularity; + enum req_op op; int alignment; if (!q) return -ENXIO; - if (!blk_queue_discard(q)) - return -EOPNOTSUPP; - if ((op_flags & REQ_SECURE) && !blk_queue_secdiscard(q)) - return -EOPNOTSUPP; + + if (flags & BLKDEV_DISCARD_SECURE) { + if (!blk_queue_secure_erase(q)) + return -EOPNOTSUPP; + op = REQ_OP_SECURE_ERASE; + } else { + if (!blk_queue_discard(q)) + return -EOPNOTSUPP; + op = REQ_OP_DISCARD; + } /* Zero-sector (unknown) and one-sector granularities are the same. */ granularity = max(q->limits.discard_granularity >> 9, 1U); @@ -66,7 +73,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, bio = next_bio(bio, 1, gfp_mask); bio->bi_iter.bi_sector = sector; bio->bi_bdev = bdev; - bio_set_op_attrs(bio, REQ_OP_DISCARD, op_flags); + bio_set_op_attrs(bio, op, 0); bio->bi_iter.bi_size = req_sects << 9; nr_sects -= req_sects; @@ -100,16 +107,12 @@ EXPORT_SYMBOL(__blkdev_issue_discard); int blkdev_issue_discard(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, unsigned long flags) { - int op_flags = 0; struct bio *bio = NULL; struct blk_plug plug; int ret; - if (flags & BLKDEV_DISCARD_SECURE) - op_flags |= REQ_SECURE; - blk_start_plug(&plug); - ret = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, op_flags, + ret = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, flags, &bio); if (!ret && bio) { ret = submit_bio_wait(bio); diff --git a/block/blk-merge.c b/block/blk-merge.c index c265348b75d1..9772308a8391 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -649,8 +649,7 @@ static int attempt_merge(struct request_queue *q, struct request *req, if (!rq_mergeable(req) || !rq_mergeable(next)) return 0; - if (!blk_check_merge_flags(req->cmd_flags, req_op(req), next->cmd_flags, - req_op(next))) + if (req_op(req) != req_op(next)) return 0; /* @@ -752,8 +751,7 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio) if (!rq_mergeable(rq) || !bio_mergeable(bio)) return false; - if (!blk_check_merge_flags(rq->cmd_flags, req_op(rq), bio->bi_rw, - bio_op(bio))) + if (req_op(rq) != bio_op(bio)) return false; /* different data direction or already started, don't merge */ diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c index 3355f1cdd4e5..2994cfa44c8a 100644 --- a/drivers/block/xen-blkback/xenbus.c +++ b/drivers/block/xen-blkback/xenbus.c @@ -480,7 +480,7 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle, if (q && test_bit(QUEUE_FLAG_WC, &q->queue_flags)) vbd->flush_support = true; - if (q && blk_queue_secdiscard(q)) + if (q && blk_queue_secure_erase(q)) vbd->discard_secure = true; pr_debug("Successful creation of handle=%04x (dom=%u)\n", diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 343ef7abe5fd..10711292da2c 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -545,7 +545,7 @@ static int blkif_queue_discard_req(struct request *req, struct blkfront_ring_inf ring_req->u.discard.nr_sectors = blk_rq_sectors(req); ring_req->u.discard.id = id; ring_req->u.discard.sector_number = (blkif_sector_t)blk_rq_pos(req); - if ((req->cmd_flags & REQ_SECURE) && info->feature_secdiscard) + if (req_op(req) == REQ_OP_SECURE_ERASE && info->feature_secdiscard) ring_req->u.discard.flag = BLKIF_DISCARD_SECURE; else ring_req->u.discard.flag = 0; @@ -841,7 +841,7 @@ static int blkif_queue_request(struct request *req, struct blkfront_ring_info *r return 1; if (unlikely(req_op(req) == REQ_OP_DISCARD || - req->cmd_flags & REQ_SECURE)) + req_op(req) == REQ_OP_SECURE_ERASE)) return blkif_queue_discard_req(req, rinfo); else return blkif_queue_rw_req(req, rinfo); @@ -955,7 +955,7 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size, rq->limits.discard_granularity = info->discard_granularity; rq->limits.discard_alignment = info->discard_alignment; if (info->feature_secdiscard) - queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, rq); + queue_flag_set_unlocked(QUEUE_FLAG_SECERASE, rq); } /* Hard sector size and max sectors impersonate the equiv. hardware. */ @@ -1595,7 +1595,7 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id) info->feature_discard = 0; info->feature_secdiscard = 0; queue_flag_clear(QUEUE_FLAG_DISCARD, rq); - queue_flag_clear(QUEUE_FLAG_SECDISCARD, rq); + queue_flag_clear(QUEUE_FLAG_SECERASE, rq); } blk_mq_complete_request(req, error); break; @@ -2052,10 +2052,14 @@ static int blkif_recover(struct blkfront_info *info) */ if (req_op(copy[i].request) == REQ_OP_FLUSH || req_op(copy[i].request) == REQ_OP_DISCARD || - copy[i].request->cmd_flags & (REQ_FUA | REQ_SECURE)) { + req_op(copy[i].request) == REQ_OP_SECURE_ERASE || + copy[i].request->cmd_flags & REQ_FUA) { /* * Flush operations don't contain bios, so * we need to requeue the whole request + * + * XXX: but this doesn't make any sense for a + * write with the FUA flag set.. */ list_add(©[i].request->queuelist, &requests); continue; diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 10e53cd6a995..41d9c31da3b3 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1058,7 +1058,6 @@ static void raid1_make_request(struct mddev *mddev, struct bio * bio) const unsigned long do_sync = (bio->bi_rw & REQ_SYNC); const unsigned long do_flush_fua = (bio->bi_rw & (REQ_PREFLUSH | REQ_FUA)); - const unsigned long do_sec = (bio->bi_rw & REQ_SECURE); struct md_rdev *blocked_rdev; struct blk_plug_cb *cb; struct raid1_plug_cb *plug = NULL; @@ -1376,7 +1375,7 @@ read_again: conf->mirrors[i].rdev->data_offset); mbio->bi_bdev = conf->mirrors[i].rdev->bdev; mbio->bi_end_io = raid1_end_write_request; - bio_set_op_attrs(mbio, op, do_flush_fua | do_sync | do_sec); + bio_set_op_attrs(mbio, op, do_flush_fua | do_sync); mbio->bi_private = r1_bio; atomic_inc(&r1_bio->remaining); diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 245640b50153..26ae74fd0d01 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1062,7 +1062,6 @@ static void __make_request(struct mddev *mddev, struct bio *bio) const int rw = bio_data_dir(bio); const unsigned long do_sync = (bio->bi_rw & REQ_SYNC); const unsigned long do_fua = (bio->bi_rw & REQ_FUA); - const unsigned long do_sec = (bio->bi_rw & REQ_SECURE); unsigned long flags; struct md_rdev *blocked_rdev; struct blk_plug_cb *cb; @@ -1362,7 +1361,7 @@ retry_write: rdev)); mbio->bi_bdev = rdev->bdev; mbio->bi_end_io = raid10_end_write_request; - bio_set_op_attrs(mbio, op, do_sync | do_fua | do_sec); + bio_set_op_attrs(mbio, op, do_sync | do_fua); mbio->bi_private = r10_bio; atomic_inc(&r10_bio->remaining); @@ -1404,7 +1403,7 @@ retry_write: r10_bio, rdev)); mbio->bi_bdev = rdev->bdev; mbio->bi_end_io = raid10_end_write_request; - bio_set_op_attrs(mbio, op, do_sync | do_fua | do_sec); + bio_set_op_attrs(mbio, op, do_sync | do_fua); mbio->bi_private = r10_bio; atomic_inc(&r10_bio->remaining); diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index bca20f88a8b2..383184743f9a 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -2167,10 +2167,12 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) /* complete ongoing async transfer before issuing discard */ if (card->host->areq) mmc_blk_issue_rw_rq(mq, NULL); - if (req->cmd_flags & REQ_SECURE) - ret = mmc_blk_issue_secdiscard_rq(mq, req); - else - ret = mmc_blk_issue_discard_rq(mq, req); + ret = mmc_blk_issue_discard_rq(mq, req); + } else if (req && req_op(req) == REQ_OP_SECURE_ERASE) { + /* complete ongoing async transfer before issuing secure erase*/ + if (card->host->areq) + mmc_blk_issue_rw_rq(mq, NULL); + ret = mmc_blk_issue_secdiscard_rq(mq, req); } else if (req && req_op(req) == REQ_OP_FLUSH) { /* complete ongoing async transfer before issuing flush */ if (card->host->areq) diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index c2d5f6f35145..bf14642a576a 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -171,7 +171,7 @@ static void mmc_queue_setup_discard(struct request_queue *q, if (card->pref_erase > max_discard) q->limits.discard_granularity = 0; if (mmc_can_secure_erase_trim(card)) - queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q); + queue_flag_set_unlocked(QUEUE_FLAG_SECERASE, q); } /** diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 562ab8301217..efba1f2ace2e 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -163,7 +163,6 @@ enum rq_flag_bits { __REQ_SYNC, /* request is sync (sync write or read) */ __REQ_META, /* metadata io request */ __REQ_PRIO, /* boost priority in cfq */ - __REQ_SECURE, /* secure discard (used with REQ_OP_DISCARD) */ __REQ_NOIDLE, /* don't anticipate more IO after this one */ __REQ_INTEGRITY, /* I/O includes block integrity payload */ @@ -212,7 +211,7 @@ enum rq_flag_bits { (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER) #define REQ_COMMON_MASK \ (REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | REQ_NOIDLE | \ - REQ_PREFLUSH | REQ_FUA | REQ_SECURE | REQ_INTEGRITY | REQ_NOMERGE) + REQ_PREFLUSH | REQ_FUA | REQ_INTEGRITY | REQ_NOMERGE) #define REQ_CLONE_MASK REQ_COMMON_MASK /* This mask is used for both bio and request merge checking */ @@ -239,7 +238,6 @@ enum rq_flag_bits { #define REQ_FLUSH_SEQ (1ULL << __REQ_FLUSH_SEQ) #define REQ_IO_STAT (1ULL << __REQ_IO_STAT) #define REQ_MIXED_MERGE (1ULL << __REQ_MIXED_MERGE) -#define REQ_SECURE (1ULL << __REQ_SECURE) #define REQ_PM (1ULL << __REQ_PM) #define REQ_HASHED (1ULL << __REQ_HASHED) #define REQ_MQ_INFLIGHT (1ULL << __REQ_MQ_INFLIGHT) @@ -248,6 +246,7 @@ enum req_op { REQ_OP_READ, REQ_OP_WRITE, REQ_OP_DISCARD, /* request to discard sectors */ + REQ_OP_SECURE_ERASE, /* request to securely erase sectors */ REQ_OP_WRITE_SAME, /* write same block many times */ REQ_OP_FLUSH, /* request for cache flush */ }; diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 0c9f8793c87e..53fee6123893 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -497,7 +497,7 @@ struct request_queue { #define QUEUE_FLAG_DISCARD 14 /* supports DISCARD */ #define QUEUE_FLAG_NOXMERGES 15 /* No extended merges */ #define QUEUE_FLAG_ADD_RANDOM 16 /* Contributes to random pool */ -#define QUEUE_FLAG_SECDISCARD 17 /* supports SECDISCARD */ +#define QUEUE_FLAG_SECERASE 17 /* supports secure erase */ #define QUEUE_FLAG_SAME_FORCE 18 /* force complete on same CPU */ #define QUEUE_FLAG_DEAD 19 /* queue tear-down finished */ #define QUEUE_FLAG_INIT_DONE 20 /* queue is initialized */ @@ -593,8 +593,8 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q) #define blk_queue_stackable(q) \ test_bit(QUEUE_FLAG_STACKABLE, &(q)->queue_flags) #define blk_queue_discard(q) test_bit(QUEUE_FLAG_DISCARD, &(q)->queue_flags) -#define blk_queue_secdiscard(q) (blk_queue_discard(q) && \ - test_bit(QUEUE_FLAG_SECDISCARD, &(q)->queue_flags)) +#define blk_queue_secure_erase(q) \ + (test_bit(QUEUE_FLAG_SECERASE, &(q)->queue_flags)) #define blk_noretry_request(rq) \ ((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \ @@ -675,21 +675,6 @@ static inline bool rq_mergeable(struct request *rq) return true; } -static inline bool blk_check_merge_flags(unsigned int flags1, unsigned int op1, - unsigned int flags2, unsigned int op2) -{ - if ((op1 == REQ_OP_DISCARD) != (op2 == REQ_OP_DISCARD)) - return false; - - if ((flags1 & REQ_SECURE) != (flags2 & REQ_SECURE)) - return false; - - if ((op1 == REQ_OP_WRITE_SAME) != (op2 == REQ_OP_WRITE_SAME)) - return false; - - return true; -} - static inline bool blk_write_same_mergeable(struct bio *a, struct bio *b) { if (bio_data(a) == bio_data(b)) @@ -1158,7 +1143,7 @@ extern int blkdev_issue_flush(struct block_device *, gfp_t, sector_t *); extern int blkdev_issue_discard(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, unsigned long flags); extern int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, - sector_t nr_sects, gfp_t gfp_mask, int op_flags, + sector_t nr_sects, gfp_t gfp_mask, int flags, struct bio **biop); extern int blkdev_issue_write_same(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, struct page *page); diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 03b0dd98ff0e..af49caf973eb 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -1791,6 +1791,10 @@ void blk_fill_rwbs(char *rwbs, int op, u32 rw, int bytes) case REQ_OP_DISCARD: rwbs[i++] = 'D'; break; + case REQ_OP_SECURE_ERASE: + rwbs[i++] = 'D'; + rwbs[i++] = 'E'; + break; case REQ_OP_FLUSH: rwbs[i++] = 'F'; break; @@ -1809,8 +1813,6 @@ void blk_fill_rwbs(char *rwbs, int op, u32 rw, int bytes) rwbs[i++] = 'S'; if (rw & REQ_META) rwbs[i++] = 'M'; - if (rw & REQ_SECURE) - rwbs[i++] = 'E'; rwbs[i] = '\0'; } -- 2.20.1