This commit introduces two helper functions
that facilitate the conversion between the
persistent reservation types used in the SCSI
protocol and those used in the block layer.
Signed-off-by: Changqi Lu <luchangqi....@bytedance.com>
Signed-off-by: zhenwei pi <pizhen...@bytedance.com>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
---
include/scsi/utils.h | 8 +++++
scsi/utils.c | 81 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 89 insertions(+)
diff --git a/include/scsi/utils.h b/include/scsi/utils.h
index d5c8efa16e..89a0b082fb 100644
--- a/include/scsi/utils.h
+++ b/include/scsi/utils.h
@@ -1,6 +1,8 @@
#ifndef SCSI_UTILS_H
#define SCSI_UTILS_H
+#include "block/block-common.h"
+#include "scsi/constants.h"
#ifdef CONFIG_LINUX
#include <scsi/sg.h>
#endif
@@ -135,6 +137,12 @@ uint32_t scsi_data_cdb_xfer(uint8_t *buf);
uint32_t scsi_cdb_xfer(uint8_t *buf);
int scsi_cdb_length(uint8_t *buf);
+BlockPrType scsi_pr_type_to_block(SCSIPrType type);
+SCSIPrType block_pr_type_to_scsi(BlockPrType type);
+
+uint8_t scsi_pr_cap_to_block(uint16_t scsi_pr_cap);
+uint16_t block_pr_cap_to_scsi(uint8_t block_pr_cap);
+
/* Linux SG_IO interface. */
#ifdef CONFIG_LINUX
#define SG_ERR_DRIVER_TIMEOUT 0x06
diff --git a/scsi/utils.c b/scsi/utils.c
index 357b036671..0dfdeb499d 100644
--- a/scsi/utils.c
+++ b/scsi/utils.c
@@ -658,3 +658,84 @@ int scsi_sense_from_host_status(uint8_t host_status,
}
return GOOD;
}
+
+BlockPrType scsi_pr_type_to_block(SCSIPrType type)
+{
+ switch (type) {
+ case SCSI_PR_WRITE_EXCLUSIVE:
+ return BLK_PR_WRITE_EXCLUSIVE;
+ case SCSI_PR_EXCLUSIVE_ACCESS:
+ return BLK_PR_EXCLUSIVE_ACCESS;
+ case SCSI_PR_WRITE_EXCLUSIVE_REGS_ONLY:
+ return BLK_PR_WRITE_EXCLUSIVE_REGS_ONLY;
+ case SCSI_PR_EXCLUSIVE_ACCESS_REGS_ONLY:
+ return BLK_PR_EXCLUSIVE_ACCESS_REGS_ONLY;
+ case SCSI_PR_WRITE_EXCLUSIVE_ALL_REGS:
+ return BLK_PR_WRITE_EXCLUSIVE_ALL_REGS;
+ case SCSI_PR_EXCLUSIVE_ACCESS_ALL_REGS:
+ return BLK_PR_EXCLUSIVE_ACCESS_ALL_REGS;
+ }
+
+ return 0;
+}
+
+SCSIPrType block_pr_type_to_scsi(BlockPrType type)
+{
+ switch (type) {
+ case BLK_PR_WRITE_EXCLUSIVE:
+ return SCSI_PR_WRITE_EXCLUSIVE;
+ case BLK_PR_EXCLUSIVE_ACCESS:
+ return SCSI_PR_EXCLUSIVE_ACCESS;
+ case BLK_PR_WRITE_EXCLUSIVE_REGS_ONLY:
+ return SCSI_PR_WRITE_EXCLUSIVE_REGS_ONLY;
+ case BLK_PR_EXCLUSIVE_ACCESS_REGS_ONLY:
+ return SCSI_PR_EXCLUSIVE_ACCESS_REGS_ONLY;
+ case BLK_PR_WRITE_EXCLUSIVE_ALL_REGS:
+ return SCSI_PR_WRITE_EXCLUSIVE_ALL_REGS;
+ case BLK_PR_EXCLUSIVE_ACCESS_ALL_REGS:
+ return SCSI_PR_EXCLUSIVE_ACCESS_ALL_REGS;
+ }
+
+ return 0;
+}
+
+
+uint8_t scsi_pr_cap_to_block(uint16_t scsi_pr_cap)
+{
+ uint8_t res = 0;
+
+ res |= (scsi_pr_cap & SCSI_PR_CAP_WR_EX) ?
+ BLK_PR_CAP_WR_EX : 0;
+ res |= (scsi_pr_cap & SCSI_PR_CAP_EX_AC) ?
+ BLK_PR_CAP_EX_AC : 0;
+ res |= (scsi_pr_cap & SCSI_PR_CAP_WR_EX_RO) ?
+ BLK_PR_CAP_WR_EX_RO : 0;
+ res |= (scsi_pr_cap & SCSI_PR_CAP_EX_AC_RO) ?
+ BLK_PR_CAP_EX_AC_RO : 0;
+ res |= (scsi_pr_cap & SCSI_PR_CAP_WR_EX_AR) ?
+ BLK_PR_CAP_WR_EX_AR : 0;
+ res |= (scsi_pr_cap & SCSI_PR_CAP_EX_AC_AR) ?
+ BLK_PR_CAP_EX_AC_AR : 0;
+
+ return res;
+}
+
+uint16_t block_pr_cap_to_scsi(uint8_t block_pr_cap)
+{
+ uint16_t res = 0;
+
+ res |= (block_pr_cap & BLK_PR_CAP_WR_EX) ?
+ SCSI_PR_CAP_WR_EX : 0;
+ res |= (block_pr_cap & BLK_PR_CAP_EX_AC) ?
+ SCSI_PR_CAP_EX_AC : 0;
+ res |= (block_pr_cap & BLK_PR_CAP_WR_EX_RO) ?
+ SCSI_PR_CAP_WR_EX_RO : 0;
+ res |= (block_pr_cap & BLK_PR_CAP_EX_AC_RO) ?
+ SCSI_PR_CAP_EX_AC_RO : 0;
+ res |= (block_pr_cap & BLK_PR_CAP_WR_EX_AR) ?
+ SCSI_PR_CAP_WR_EX_AR : 0;
+ res |= (block_pr_cap & BLK_PR_CAP_EX_AC_AR) ?
+ SCSI_PR_CAP_EX_AC_AR : 0;
+
+ return res;
+}
--
2.20.1
