diff options
Diffstat (limited to 'block/blk-integrity.c')
| -rw-r--r-- | block/blk-integrity.c | 77 |
1 files changed, 70 insertions, 7 deletions
diff --git a/block/blk-integrity.c b/block/blk-integrity.c index a1678f0a9f81..056b8948369d 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -13,6 +13,7 @@ #include <linux/scatterlist.h> #include <linux/export.h> #include <linux/slab.h> +#include <linux/t10-pi.h> #include "blk.h" @@ -54,6 +55,73 @@ new_segment: return segments; } +int blk_get_meta_cap(struct block_device *bdev, unsigned int cmd, + struct logical_block_metadata_cap __user *argp) +{ + struct blk_integrity *bi = blk_get_integrity(bdev->bd_disk); + struct logical_block_metadata_cap meta_cap = {}; + size_t usize = _IOC_SIZE(cmd); + + if (_IOC_DIR(cmd) != _IOC_DIR(FS_IOC_GETLBMD_CAP) || + _IOC_TYPE(cmd) != _IOC_TYPE(FS_IOC_GETLBMD_CAP) || + _IOC_NR(cmd) != _IOC_NR(FS_IOC_GETLBMD_CAP) || + _IOC_SIZE(cmd) < LBMD_SIZE_VER0) + return -ENOIOCTLCMD; + + if (!bi) + goto out; + + if (bi->flags & BLK_INTEGRITY_DEVICE_CAPABLE) + meta_cap.lbmd_flags |= LBMD_PI_CAP_INTEGRITY; + if (bi->flags & BLK_INTEGRITY_REF_TAG) + meta_cap.lbmd_flags |= LBMD_PI_CAP_REFTAG; + meta_cap.lbmd_interval = 1 << bi->interval_exp; + meta_cap.lbmd_size = bi->metadata_size; + meta_cap.lbmd_pi_size = bi->pi_tuple_size; + meta_cap.lbmd_pi_offset = bi->pi_offset; + meta_cap.lbmd_opaque_size = bi->metadata_size - bi->pi_tuple_size; + if (meta_cap.lbmd_opaque_size && !bi->pi_offset) + meta_cap.lbmd_opaque_offset = bi->pi_tuple_size; + + switch (bi->csum_type) { + case BLK_INTEGRITY_CSUM_NONE: + meta_cap.lbmd_guard_tag_type = LBMD_PI_CSUM_NONE; + break; + case BLK_INTEGRITY_CSUM_IP: + meta_cap.lbmd_guard_tag_type = LBMD_PI_CSUM_IP; + break; + case BLK_INTEGRITY_CSUM_CRC: + meta_cap.lbmd_guard_tag_type = LBMD_PI_CSUM_CRC16_T10DIF; + break; + case BLK_INTEGRITY_CSUM_CRC64: + meta_cap.lbmd_guard_tag_type = LBMD_PI_CSUM_CRC64_NVME; + break; + } + + if (bi->csum_type != BLK_INTEGRITY_CSUM_NONE) + meta_cap.lbmd_app_tag_size = 2; + + if (bi->flags & BLK_INTEGRITY_REF_TAG) { + switch (bi->csum_type) { + case BLK_INTEGRITY_CSUM_CRC64: + meta_cap.lbmd_ref_tag_size = + sizeof_field(struct crc64_pi_tuple, ref_tag); + break; + case BLK_INTEGRITY_CSUM_CRC: + case BLK_INTEGRITY_CSUM_IP: + meta_cap.lbmd_ref_tag_size = + sizeof_field(struct t10_pi_tuple, ref_tag); + break; + default: + break; + } + } + +out: + return copy_struct_to_user(argp, usize, &meta_cap, sizeof(meta_cap), + NULL); +} + /** * blk_rq_map_integrity_sg - Map integrity metadata into a scatterlist * @rq: request to map @@ -117,13 +185,8 @@ int blk_rq_integrity_map_user(struct request *rq, void __user *ubuf, { int ret; struct iov_iter iter; - unsigned int direction; - if (op_is_write(req_op(rq))) - direction = ITER_DEST; - else - direction = ITER_SOURCE; - iov_iter_ubuf(&iter, direction, ubuf, bytes); + iov_iter_ubuf(&iter, rq_data_dir(rq), ubuf, bytes); ret = bio_integrity_map_user(rq->bio, &iter); if (ret) return ret; @@ -244,7 +307,7 @@ static ssize_t format_show(struct device *dev, struct device_attribute *attr, { struct blk_integrity *bi = dev_to_bi(dev); - if (!bi->tuple_size) + if (!bi->metadata_size) return sysfs_emit(page, "none\n"); return sysfs_emit(page, "%s\n", blk_integrity_profile_name(bi)); } |