block: Remove integrity tagging functions

None of the filesystems appear interested in using the integrity tagging
feature. Potentially because very few storage devices actually permit
using the application tag space.

Remove the tagging functions.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 0 insertions, 65 deletions

diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c
index 29f0477a8708..38a7778631be 100644
--- a/drivers/scsi/sd_dif.c
+++ b/drivers/scsi/sd_dif.c
@@ -128,39 +128,10 @@ static int sd_dif_type1_verify_ip(struct blk_integrity_exchg *bix)
 	return sd_dif_type1_verify(bix, sd_dif_ip_fn);
 }
 
-/*
- * Functions for interleaving and deinterleaving application tags
- */
-static void sd_dif_type1_set_tag(void *prot, void *tag_buf, unsigned int sectors)
-{
-	struct sd_dif_tuple *sdt = prot;
-	u8 *tag = tag_buf;
-	unsigned int i, j;
-
-	for (i = 0, j = 0 ; i < sectors ; i++, j += 2, sdt++) {
-		sdt->app_tag = tag[j] << 8 | tag[j+1];
-		BUG_ON(sdt->app_tag == 0xffff);
-	}
-}
-
-static void sd_dif_type1_get_tag(void *prot, void *tag_buf, unsigned int sectors)
-{
-	struct sd_dif_tuple *sdt = prot;
-	u8 *tag = tag_buf;
-	unsigned int i, j;
-
-	for (i = 0, j = 0 ; i < sectors ; i++, j += 2, sdt++) {
-		tag[j] = (sdt->app_tag & 0xff00) >> 8;
-		tag[j+1] = sdt->app_tag & 0xff;
-	}
-}
-
 static struct blk_integrity dif_type1_integrity_crc = {
 	.name			= "T10-DIF-TYPE1-CRC",
 	.generate_fn		= sd_dif_type1_generate_crc,
 	.verify_fn		= sd_dif_type1_verify_crc,
-	.get_tag_fn		= sd_dif_type1_get_tag,
-	.set_tag_fn		= sd_dif_type1_set_tag,
 	.tuple_size		= sizeof(struct sd_dif_tuple),
 	.tag_size		= 0,
 };
@@ -169,8 +140,6 @@ static struct blk_integrity dif_type1_integrity_ip = {
 	.name			= "T10-DIF-TYPE1-IP",
 	.generate_fn		= sd_dif_type1_generate_ip,
 	.verify_fn		= sd_dif_type1_verify_ip,
-	.get_tag_fn		= sd_dif_type1_get_tag,
-	.set_tag_fn		= sd_dif_type1_set_tag,
 	.tuple_size		= sizeof(struct sd_dif_tuple),
 	.tag_size		= 0,
 };
@@ -245,42 +214,10 @@ static int sd_dif_type3_verify_ip(struct blk_integrity_exchg *bix)
 	return sd_dif_type3_verify(bix, sd_dif_ip_fn);
 }
 
-static void sd_dif_type3_set_tag(void *prot, void *tag_buf, unsigned int sectors)
-{
-	struct sd_dif_tuple *sdt = prot;
-	u8 *tag = tag_buf;
-	unsigned int i, j;
-
-	for (i = 0, j = 0 ; i < sectors ; i++, j += 6, sdt++) {
-		sdt->app_tag = tag[j] << 8 | tag[j+1];
-		sdt->ref_tag = tag[j+2] << 24 | tag[j+3] << 16 |
-			tag[j+4] << 8 | tag[j+5];
-	}
-}
-
-static void sd_dif_type3_get_tag(void *prot, void *tag_buf, unsigned int sectors)
-{
-	struct sd_dif_tuple *sdt = prot;
-	u8 *tag = tag_buf;
-	unsigned int i, j;
-
-	for (i = 0, j = 0 ; i < sectors ; i++, j += 2, sdt++) {
-		tag[j] = (sdt->app_tag & 0xff00) >> 8;
-		tag[j+1] = sdt->app_tag & 0xff;
-		tag[j+2] = (sdt->ref_tag & 0xff000000) >> 24;
-		tag[j+3] = (sdt->ref_tag & 0xff0000) >> 16;
-		tag[j+4] = (sdt->ref_tag & 0xff00) >> 8;
-		tag[j+5] = sdt->ref_tag & 0xff;
-		BUG_ON(sdt->app_tag == 0xffff || sdt->ref_tag == 0xffffffff);
-	}
-}
-
 static struct blk_integrity dif_type3_integrity_crc = {
 	.name			= "T10-DIF-TYPE3-CRC",
 	.generate_fn		= sd_dif_type3_generate_crc,
 	.verify_fn		= sd_dif_type3_verify_crc,
-	.get_tag_fn		= sd_dif_type3_get_tag,
-	.set_tag_fn		= sd_dif_type3_set_tag,
 	.tuple_size		= sizeof(struct sd_dif_tuple),
 	.tag_size		= 0,
 };
@@ -289,8 +226,6 @@ static struct blk_integrity dif_type3_integrity_ip = {
 	.name			= "T10-DIF-TYPE3-IP",
 	.generate_fn		= sd_dif_type3_generate_ip,
 	.verify_fn		= sd_dif_type3_verify_ip,
-	.get_tag_fn		= sd_dif_type3_get_tag,
-	.set_tag_fn		= sd_dif_type3_set_tag,
 	.tuple_size		= sizeof(struct sd_dif_tuple),
 	.tag_size		= 0,
 };