t10-pi: Move opencoded contants to common header

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/t10-pi.c b/block/t10-pi.c
index 3416dadf7b15b3c66cd71d04d9a954d7d0238657..a98db384048fa0f1e497fc740faebaabce79c955 100644 (file)
--- a/block/t10-pi.c
+++ b/block/t10-pi.c
@@ -28,9 +28,6 @@
 
 typedef __be16 (csum_fn) (void *, unsigned int);
 
-static const __be16 APP_ESCAPE = (__force __be16) 0xffff;
-static const __be32 REF_ESCAPE = (__force __be32) 0xffffffff;
-
 static __be16 t10_pi_crc_fn(void *data, unsigned int len)
 {
        return cpu_to_be16(crc_t10dif(data, len));
@@ -82,7 +79,7 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
                switch (type) {
                case 1:
                case 2:
-                       if (pi->app_tag == APP_ESCAPE)
+                       if (pi->app_tag == T10_PI_APP_ESCAPE)
                                goto next;
 
                        if (be32_to_cpu(pi->ref_tag) !=
@@ -95,8 +92,8 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
                        }
                        break;
                case 3:
-                       if (pi->app_tag == APP_ESCAPE &&
-                           pi->ref_tag == REF_ESCAPE)
+                       if (pi->app_tag == T10_PI_APP_ESCAPE &&
+                           pi->ref_tag == T10_PI_REF_ESCAPE)
                                goto next;
                        break;
                }

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 54fd0c81ceaf69a7ceb475acb87e309df7e10de1..99d2e990b231bc70566cea254c91759ab4ae19d3 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -26,6 +26,7 @@
 #include <linux/export.h>
 #include <linux/delay.h>
 #include <asm/unaligned.h>
+#include <linux/t10-pi.h>
 #include <linux/crc-t10dif.h>
 #include <net/checksum.h>
 
@@ -2934,8 +2935,8 @@ lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
                                 * First check to see if a protection data
                                 * check is valid
                                 */
-                               if ((src->ref_tag == 0xffffffff) ||
-                                   (src->app_tag == 0xffff)) {
+                               if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
+                                   (src->app_tag == T10_PI_APP_ESCAPE)) {
                                        start_ref_tag++;
                                        goto skipit;
                                }

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 2572121b765b488b4ee5dbec726e9240e0df25a9..de031aed94f65365239419889e5d406549652439 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1950,9 +1950,9 @@ qla2x00_handle_dif_error(srb_t *sp, struct sts_entry_24xx *sts24)
         * For type     3: ref & app tag is all 'f's
         * For type 0,1,2: app tag is all 'f's
         */
-       if ((a_app_tag == 0xffff) &&
+       if ((a_app_tag == T10_PI_APP_ESCAPE) &&
            ((scsi_get_prot_type(cmd) != SCSI_PROT_DIF_TYPE3) ||
-            (a_ref_tag == 0xffffffff))) {
+            (a_ref_tag == T10_PI_REF_ESCAPE))) {
                uint32_t blocks_done, resid;
                sector_t lba_s = scsi_get_lba(cmd);
 
@@ -1994,9 +1994,9 @@ qla2x00_handle_dif_error(srb_t *sp, struct sts_entry_24xx *sts24)
                        spt = page_address(sg_page(sg)) + sg->offset;
                        spt += j;
 
-                       spt->app_tag = 0xffff;
+                       spt->app_tag = T10_PI_APP_ESCAPE;
                        if (scsi_get_prot_type(cmd) == SCSI_PROT_DIF_TYPE3)
-                               spt->ref_tag = 0xffffffff;
+                               spt->ref_tag = T10_PI_REF_ESCAPE;
                }
 
                return 0;

diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 4316f7b65fb7691fa38e81ce7ed4d4d62b9520df..dc9456e7dac985534ea72c4f8a7d9883ada53644 100644 (file)
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -1450,7 +1450,7 @@ sbc_dif_verify(struct se_cmd *cmd, sector_t start, unsigned int sectors,
                                 (unsigned long long)sector, sdt->guard_tag,
                                 sdt->app_tag, be32_to_cpu(sdt->ref_tag));
 
-                       if (sdt->app_tag == cpu_to_be16(0xffff)) {
+                       if (sdt->app_tag == T10_PI_APP_ESCAPE) {
                                dsg_off += block_size;
                                goto next;
                        }

diff --git a/include/linux/t10-pi.h b/include/linux/t10-pi.h
index 9375d23a24e7aba97504d743e77d3b78f4d72493..635a3c5706bdeb75378b22d93ce77ba811be0cf3 100644 (file)
--- a/include/linux/t10-pi.h
+++ b/include/linux/t10-pi.h
@@ -33,6 +33,8 @@ struct t10_pi_tuple {
        __be32 ref_tag;         /* Target LBA or indirect LBA */
 };
 
+#define T10_PI_APP_ESCAPE cpu_to_be16(0xffff)
+#define T10_PI_REF_ESCAPE cpu_to_be32(0xffffffff)
 
 extern const struct blk_integrity_profile t10_pi_type1_crc;
 extern const struct blk_integrity_profile t10_pi_type1_ip;