Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * blk-integrity.c - Block layer data integrity extensions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2007, 2008 Oracle Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Written by: Martin K. Petersen <martin.petersen@oracle.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/backing-dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/mempool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/bio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "blk.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * blk_rq_count_integrity_sg - Count number of integrity scatterlist elements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * @q:		request queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * @bio:	bio with integrity metadata attached
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * Description: Returns the number of elements required in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * scatterlist corresponding to the integrity metadata in a bio.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) int blk_rq_count_integrity_sg(struct request_queue *q, struct bio *bio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct bio_vec iv, ivprv = { NULL };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	unsigned int segments = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	unsigned int seg_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	struct bvec_iter iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	int prev = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	bio_for_each_integrity_vec(iv, bio, iter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		if (prev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 			if (!biovec_phys_mergeable(q, &ivprv, &iv))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 				goto new_segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 			if (seg_size + iv.bv_len > queue_max_segment_size(q))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 				goto new_segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 			seg_size += iv.bv_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) new_segment:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 			segments++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 			seg_size = iv.bv_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		prev = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		ivprv = iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	return segments;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) EXPORT_SYMBOL(blk_rq_count_integrity_sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * blk_rq_map_integrity_sg - Map integrity metadata into a scatterlist
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  * @q:		request queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61)  * @bio:	bio with integrity metadata attached
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  * @sglist:	target scatterlist
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * Description: Map the integrity vectors in request into a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  * scatterlist.  The scatterlist must be big enough to hold all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  * elements.  I.e. sized using blk_rq_count_integrity_sg().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) int blk_rq_map_integrity_sg(struct request_queue *q, struct bio *bio,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 			    struct scatterlist *sglist)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct bio_vec iv, ivprv = { NULL };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	struct scatterlist *sg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	unsigned int segments = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct bvec_iter iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	int prev = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	bio_for_each_integrity_vec(iv, bio, iter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		if (prev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 			if (!biovec_phys_mergeable(q, &ivprv, &iv))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 				goto new_segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 			if (sg->length + iv.bv_len > queue_max_segment_size(q))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 				goto new_segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			sg->length += iv.bv_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) new_segment:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			if (!sg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 				sg = sglist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 				sg_unmark_end(sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 				sg = sg_next(sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			sg_set_page(sg, iv.bv_page, iv.bv_len, iv.bv_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			segments++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		prev = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		ivprv = iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	if (sg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		sg_mark_end(sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	return segments;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) EXPORT_SYMBOL(blk_rq_map_integrity_sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)  * blk_integrity_compare - Compare integrity profile of two disks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)  * @gd1:	Disk to compare
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)  * @gd2:	Disk to compare
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)  * Description: Meta-devices like DM and MD need to verify that all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)  * sub-devices use the same integrity format before advertising to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)  * upper layers that they can send/receive integrity metadata.  This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)  * function can be used to check whether two gendisk devices have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)  * compatible integrity formats.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int blk_integrity_compare(struct gendisk *gd1, struct gendisk *gd2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	struct blk_integrity *b1 = &gd1->queue->integrity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct blk_integrity *b2 = &gd2->queue->integrity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if (!b1->profile && !b2->profile)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (!b1->profile || !b2->profile)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (b1->interval_exp != b2->interval_exp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		pr_err("%s: %s/%s protection interval %u != %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		       __func__, gd1->disk_name, gd2->disk_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		       1 << b1->interval_exp, 1 << b2->interval_exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	if (b1->tuple_size != b2->tuple_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		pr_err("%s: %s/%s tuple sz %u != %u\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		       gd1->disk_name, gd2->disk_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		       b1->tuple_size, b2->tuple_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (b1->tag_size && b2->tag_size && (b1->tag_size != b2->tag_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		pr_err("%s: %s/%s tag sz %u != %u\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		       gd1->disk_name, gd2->disk_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		       b1->tag_size, b2->tag_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	if (b1->profile != b2->profile) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		pr_err("%s: %s/%s type %s != %s\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		       gd1->disk_name, gd2->disk_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		       b1->profile->name, b2->profile->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) EXPORT_SYMBOL(blk_integrity_compare);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) bool blk_integrity_merge_rq(struct request_queue *q, struct request *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			    struct request *next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (blk_integrity_rq(req) == 0 && blk_integrity_rq(next) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	if (blk_integrity_rq(req) == 0 || blk_integrity_rq(next) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (bio_integrity(req->bio)->bip_flags !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	    bio_integrity(next->bio)->bip_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (req->nr_integrity_segments + next->nr_integrity_segments >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	    q->limits.max_integrity_segments)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	if (integrity_req_gap_back_merge(req, next->bio))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) bool blk_integrity_merge_bio(struct request_queue *q, struct request *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 			     struct bio *bio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	int nr_integrity_segs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct bio *next = bio->bi_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (blk_integrity_rq(req) == 0 && bio_integrity(bio) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	if (blk_integrity_rq(req) == 0 || bio_integrity(bio) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (bio_integrity(req->bio)->bip_flags != bio_integrity(bio)->bip_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	bio->bi_next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	nr_integrity_segs = blk_rq_count_integrity_sg(q, bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	bio->bi_next = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	if (req->nr_integrity_segments + nr_integrity_segs >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	    q->limits.max_integrity_segments)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	req->nr_integrity_segments += nr_integrity_segs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct integrity_sysfs_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	struct attribute attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	ssize_t (*show)(struct blk_integrity *, char *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	ssize_t (*store)(struct blk_integrity *, const char *, size_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) static ssize_t integrity_attr_show(struct kobject *kobj, struct attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 				   char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	struct gendisk *disk = container_of(kobj, struct gendisk, integrity_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	struct blk_integrity *bi = &disk->queue->integrity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	struct integrity_sysfs_entry *entry =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		container_of(attr, struct integrity_sysfs_entry, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	return entry->show(bi, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static ssize_t integrity_attr_store(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 				    struct attribute *attr, const char *page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 				    size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	struct gendisk *disk = container_of(kobj, struct gendisk, integrity_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	struct blk_integrity *bi = &disk->queue->integrity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	struct integrity_sysfs_entry *entry =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		container_of(attr, struct integrity_sysfs_entry, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	ssize_t ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	if (entry->store)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		ret = entry->store(bi, page, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static ssize_t integrity_format_show(struct blk_integrity *bi, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	if (bi->profile && bi->profile->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		return sprintf(page, "%s\n", bi->profile->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		return sprintf(page, "none\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) static ssize_t integrity_tag_size_show(struct blk_integrity *bi, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	return sprintf(page, "%u\n", bi->tag_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static ssize_t integrity_interval_show(struct blk_integrity *bi, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	return sprintf(page, "%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		       bi->interval_exp ? 1 << bi->interval_exp : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static ssize_t integrity_verify_store(struct blk_integrity *bi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 				      const char *page, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	char *p = (char *) page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	unsigned long val = simple_strtoul(p, &p, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	if (val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		bi->flags |= BLK_INTEGRITY_VERIFY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		bi->flags &= ~BLK_INTEGRITY_VERIFY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) static ssize_t integrity_verify_show(struct blk_integrity *bi, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	return sprintf(page, "%d\n", (bi->flags & BLK_INTEGRITY_VERIFY) != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static ssize_t integrity_generate_store(struct blk_integrity *bi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 					const char *page, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	char *p = (char *) page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	unsigned long val = simple_strtoul(p, &p, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	if (val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		bi->flags |= BLK_INTEGRITY_GENERATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		bi->flags &= ~BLK_INTEGRITY_GENERATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static ssize_t integrity_generate_show(struct blk_integrity *bi, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	return sprintf(page, "%d\n", (bi->flags & BLK_INTEGRITY_GENERATE) != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) static ssize_t integrity_device_show(struct blk_integrity *bi, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	return sprintf(page, "%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		       (bi->flags & BLK_INTEGRITY_DEVICE_CAPABLE) != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) static struct integrity_sysfs_entry integrity_format_entry = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	.attr = { .name = "format", .mode = 0444 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	.show = integrity_format_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static struct integrity_sysfs_entry integrity_tag_size_entry = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	.attr = { .name = "tag_size", .mode = 0444 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	.show = integrity_tag_size_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) static struct integrity_sysfs_entry integrity_interval_entry = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	.attr = { .name = "protection_interval_bytes", .mode = 0444 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	.show = integrity_interval_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) static struct integrity_sysfs_entry integrity_verify_entry = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	.attr = { .name = "read_verify", .mode = 0644 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	.show = integrity_verify_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	.store = integrity_verify_store,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) static struct integrity_sysfs_entry integrity_generate_entry = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	.attr = { .name = "write_generate", .mode = 0644 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	.show = integrity_generate_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	.store = integrity_generate_store,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static struct integrity_sysfs_entry integrity_device_entry = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	.attr = { .name = "device_is_integrity_capable", .mode = 0444 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	.show = integrity_device_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static struct attribute *integrity_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	&integrity_format_entry.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	&integrity_tag_size_entry.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	&integrity_interval_entry.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	&integrity_verify_entry.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	&integrity_generate_entry.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	&integrity_device_entry.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) ATTRIBUTE_GROUPS(integrity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static const struct sysfs_ops integrity_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	.show	= &integrity_attr_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	.store	= &integrity_attr_store,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static struct kobj_type integrity_ktype = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	.default_groups = integrity_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	.sysfs_ops	= &integrity_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) static blk_status_t blk_integrity_nop_fn(struct blk_integrity_iter *iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	return BLK_STS_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) static void blk_integrity_nop_prepare(struct request *rq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static void blk_integrity_nop_complete(struct request *rq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		unsigned int nr_bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) static const struct blk_integrity_profile nop_profile = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	.name = "nop",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	.generate_fn = blk_integrity_nop_fn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	.verify_fn = blk_integrity_nop_fn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	.prepare_fn = blk_integrity_nop_prepare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	.complete_fn = blk_integrity_nop_complete,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)  * blk_integrity_register - Register a gendisk as being integrity-capable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)  * @disk:	struct gendisk pointer to make integrity-aware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)  * @template:	block integrity profile to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)  * Description: When a device needs to advertise itself as being able to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)  * send/receive integrity metadata it must use this function to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)  * the capability with the block layer. The template is a blk_integrity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)  * struct with values appropriate for the underlying hardware. See
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)  * Documentation/block/data-integrity.rst.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) void blk_integrity_register(struct gendisk *disk, struct blk_integrity *template)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	struct blk_integrity *bi = &disk->queue->integrity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	bi->flags = BLK_INTEGRITY_VERIFY | BLK_INTEGRITY_GENERATE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		template->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	bi->interval_exp = template->interval_exp ? :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		ilog2(queue_logical_block_size(disk->queue));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	bi->profile = template->profile ? template->profile : &nop_profile;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	bi->tuple_size = template->tuple_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	bi->tag_size = template->tag_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, disk->queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) #ifdef CONFIG_BLK_INLINE_ENCRYPTION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	if (disk->queue->ksm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 		pr_warn("blk-integrity: Integrity and hardware inline encryption are not supported together. Disabling hardware inline encryption.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 		blk_ksm_unregister(disk->queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) EXPORT_SYMBOL(blk_integrity_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)  * blk_integrity_unregister - Unregister block integrity profile
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)  * @disk:	disk whose integrity profile to unregister
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)  * Description: This function unregisters the integrity capability from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)  * a block device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) void blk_integrity_unregister(struct gendisk *disk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	struct blk_integrity *bi = &disk->queue->integrity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	if (!bi->profile)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	/* ensure all bios are off the integrity workqueue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	blk_flush_integrity();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	blk_queue_flag_clear(QUEUE_FLAG_STABLE_WRITES, disk->queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	memset(bi, 0, sizeof(*bi));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) EXPORT_SYMBOL(blk_integrity_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) void blk_integrity_add(struct gendisk *disk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	if (kobject_init_and_add(&disk->integrity_kobj, &integrity_ktype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 				 &disk_to_dev(disk)->kobj, "%s", "integrity"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 	kobject_uevent(&disk->integrity_kobj, KOBJ_ADD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) void blk_integrity_del(struct gendisk *disk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	kobject_uevent(&disk->integrity_kobj, KOBJ_REMOVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 	kobject_del(&disk->integrity_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	kobject_put(&disk->integrity_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }