diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-core.c | 2 | ||||
| -rw-r--r-- | block/blk-lib.c | 64 | ||||
| -rw-r--r-- | block/blk-mq-debugfs.c | 1 | ||||
| -rw-r--r-- | block/blk-settings.c | 16 | ||||
| -rw-r--r-- | block/fops.c | 2 | ||||
| -rw-r--r-- | block/ioctl.c | 43 |
6 files changed, 97 insertions, 31 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index b5c3a8049134..ee18b6a699bd 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -824,7 +824,7 @@ void submit_bio_noacct(struct bio *bio) goto not_supported; break; case REQ_OP_SECURE_ERASE: - if (!blk_queue_secure_erase(q)) + if (!bdev_max_secure_erase_sectors(bdev)) goto not_supported; break; case REQ_OP_ZONE_APPEND: diff --git a/block/blk-lib.c b/block/blk-lib.c index 43aa4d7fe859..09b7e1200c0f 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -36,26 +36,15 @@ static sector_t bio_discard_limit(struct block_device *bdev, sector_t sector) } int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, - sector_t nr_sects, gfp_t gfp_mask, int flags, - struct bio **biop) + sector_t nr_sects, gfp_t gfp_mask, struct bio **biop) { - struct request_queue *q = bdev_get_queue(bdev); struct bio *bio = *biop; - unsigned int op; sector_t bs_mask; if (bdev_read_only(bdev)) return -EPERM; - - if (flags & BLKDEV_DISCARD_SECURE) { - if (!blk_queue_secure_erase(q)) - return -EOPNOTSUPP; - op = REQ_OP_SECURE_ERASE; - } else { - if (!bdev_max_discard_sectors(bdev)) - return -EOPNOTSUPP; - op = REQ_OP_DISCARD; - } + if (!bdev_max_discard_sectors(bdev)) + return -EOPNOTSUPP; /* In case the discard granularity isn't set by buggy device driver */ if (WARN_ON_ONCE(!bdev_discard_granularity(bdev))) { @@ -77,7 +66,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, sector_t req_sects = min(nr_sects, bio_discard_limit(bdev, sector)); - bio = blk_next_bio(bio, bdev, 0, op, gfp_mask); + bio = blk_next_bio(bio, bdev, 0, REQ_OP_DISCARD, gfp_mask); bio->bi_iter.bi_sector = sector; bio->bi_iter.bi_size = req_sects << 9; sector += req_sects; @@ -103,21 +92,19 @@ EXPORT_SYMBOL(__blkdev_issue_discard); * @sector: start sector * @nr_sects: number of sectors to discard * @gfp_mask: memory allocation flags (for bio_alloc) - * @flags: BLKDEV_DISCARD_* flags to control behaviour * * Description: * Issue a discard request for the sectors in question. */ int blkdev_issue_discard(struct block_device *bdev, sector_t sector, - sector_t nr_sects, gfp_t gfp_mask, unsigned long flags) + sector_t nr_sects, gfp_t gfp_mask) { struct bio *bio = NULL; struct blk_plug plug; int ret; blk_start_plug(&plug); - ret = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, flags, - &bio); + ret = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, &bio); if (!ret && bio) { ret = submit_bio_wait(bio); if (ret == -EOPNOTSUPP) @@ -314,3 +301,42 @@ retry: return ret; } EXPORT_SYMBOL(blkdev_issue_zeroout); + +int blkdev_issue_secure_erase(struct block_device *bdev, sector_t sector, + sector_t nr_sects, gfp_t gfp) +{ + sector_t bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1; + unsigned int max_sectors = bdev_max_secure_erase_sectors(bdev); + struct bio *bio = NULL; + struct blk_plug plug; + int ret = 0; + + if (max_sectors == 0) + return -EOPNOTSUPP; + if ((sector | nr_sects) & bs_mask) + return -EINVAL; + if (bdev_read_only(bdev)) + return -EPERM; + + blk_start_plug(&plug); + for (;;) { + unsigned int len = min_t(sector_t, nr_sects, max_sectors); + + bio = blk_next_bio(bio, bdev, 0, REQ_OP_SECURE_ERASE, gfp); + bio->bi_iter.bi_sector = sector; + bio->bi_iter.bi_size = len; + + sector += len << SECTOR_SHIFT; + nr_sects -= len << SECTOR_SHIFT; + if (!nr_sects) { + ret = submit_bio_wait(bio); + bio_put(bio); + break; + } + cond_resched(); + } + blk_finish_plug(&plug); + + return ret; +} +EXPORT_SYMBOL(blkdev_issue_secure_erase); diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index fd111c500125..7e4136a60e1c 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -115,7 +115,6 @@ static const char *const blk_queue_flag_name[] = { QUEUE_FLAG_NAME(IO_STAT), QUEUE_FLAG_NAME(NOXMERGES), QUEUE_FLAG_NAME(ADD_RANDOM), - QUEUE_FLAG_NAME(SECERASE), QUEUE_FLAG_NAME(SAME_FORCE), QUEUE_FLAG_NAME(DEAD), QUEUE_FLAG_NAME(INIT_DONE), diff --git a/block/blk-settings.c b/block/blk-settings.c index fd83d674afd0..6ccceb421ed2 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -46,6 +46,7 @@ void blk_set_default_limits(struct queue_limits *lim) lim->max_zone_append_sectors = 0; lim->max_discard_sectors = 0; lim->max_hw_discard_sectors = 0; + lim->max_secure_erase_sectors = 0; lim->discard_granularity = 0; lim->discard_alignment = 0; lim->discard_misaligned = 0; @@ -177,6 +178,18 @@ void blk_queue_max_discard_sectors(struct request_queue *q, EXPORT_SYMBOL(blk_queue_max_discard_sectors); /** + * blk_queue_max_secure_erase_sectors - set max sectors for a secure erase + * @q: the request queue for the device + * @max_sectors: maximum number of sectors to secure_erase + **/ +void blk_queue_max_secure_erase_sectors(struct request_queue *q, + unsigned int max_sectors) +{ + q->limits.max_secure_erase_sectors = max_sectors; +} +EXPORT_SYMBOL(blk_queue_max_secure_erase_sectors); + +/** * blk_queue_max_write_zeroes_sectors - set max sectors for a single * write zeroes * @q: the request queue for the device @@ -661,7 +674,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, t->discard_alignment = lcm_not_zero(t->discard_alignment, alignment) % t->discard_granularity; } - + t->max_secure_erase_sectors = min_not_zero(t->max_secure_erase_sectors, + b->max_secure_erase_sectors); t->zone_write_granularity = max(t->zone_write_granularity, b->zone_write_granularity); t->zoned = max(t->zoned, b->zoned); diff --git a/block/fops.c b/block/fops.c index ba5e7d5ff9a5..e3643362c244 100644 --- a/block/fops.c +++ b/block/fops.c @@ -677,7 +677,7 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE | FALLOC_FL_NO_HIDE_STALE: error = blkdev_issue_discard(bdev, start >> SECTOR_SHIFT, - len >> SECTOR_SHIFT, GFP_KERNEL, 0); + len >> SECTOR_SHIFT, GFP_KERNEL); break; default: error = -EOPNOTSUPP; diff --git a/block/ioctl.c b/block/ioctl.c index eaee0efc0bea..46949f1b0dba 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -83,7 +83,7 @@ static int compat_blkpg_ioctl(struct block_device *bdev, #endif static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, - unsigned long arg, unsigned long flags) + unsigned long arg) { uint64_t range[2]; uint64_t start, len; @@ -114,15 +114,43 @@ static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, err = truncate_bdev_range(bdev, mode, start, start + len - 1); if (err) goto fail; - - err = blkdev_issue_discard(bdev, start >> 9, len >> 9, - GFP_KERNEL, flags); - + err = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL); fail: filemap_invalidate_unlock(inode->i_mapping); return err; } +static int blk_ioctl_secure_erase(struct block_device *bdev, fmode_t mode, + void __user *argp) +{ + uint64_t start, len; + uint64_t range[2]; + int err; + + if (!(mode & FMODE_WRITE)) + return -EBADF; + if (!bdev_max_secure_erase_sectors(bdev)) + return -EOPNOTSUPP; + if (copy_from_user(range, argp, sizeof(range))) + return -EFAULT; + + start = range[0]; + len = range[1]; + if ((start & 511) || (len & 511)) + return -EINVAL; + if (start + len > bdev_nr_bytes(bdev)) + return -EINVAL; + + filemap_invalidate_lock(bdev->bd_inode->i_mapping); + err = truncate_bdev_range(bdev, mode, start, start + len - 1); + if (!err) + err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9, + GFP_KERNEL); + filemap_invalidate_unlock(bdev->bd_inode->i_mapping); + return err; +} + + static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, unsigned long arg) { @@ -450,10 +478,9 @@ static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode, case BLKROSET: return blkdev_roset(bdev, mode, cmd, arg); case BLKDISCARD: - return blk_ioctl_discard(bdev, mode, arg, 0); + return blk_ioctl_discard(bdev, mode, arg); case BLKSECDISCARD: - return blk_ioctl_discard(bdev, mode, arg, - BLKDEV_DISCARD_SECURE); + return blk_ioctl_secure_erase(bdev, mode, argp); case BLKZEROOUT: return blk_ioctl_zeroout(bdev, mode, arg); case BLKGETDISKSEQ: |