[PATCH v3 03/19] scsi: Move sd_pr_type to header to share

Mike Christie
2022-10-26T23:20:31Z

LIO is going to want to do the same block to/from SCSI pr types as sd.c
so this moves the sd_pr_type helper to a new file. The next patch will
then also add a helper to go from the SCSI value to the block one for use
with PERSISTENT_RESERVE_IN commands.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
drivers/scsi/sd.c | 31 +++++++------------------------
include/scsi/scsi_block_pr.h | 36 ++++++++++++++++++++++++++++++++++++
2 files changed, 43 insertions(+), 24 deletions(-)
create mode 100644 include/scsi/scsi_block_pr.h

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 4dc5c932fbd3..ad9374b07585 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -67,6 +67,7 @@
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsicam.h>
+#include <scsi/scsi_block_pr.h>

#include "sd.h"
#include "scsi_priv.h"
@@ -1694,28 +1695,8 @@ static int sd_get_unique_id(struct gendisk *disk, u8 id[16],
return ret;
}

-static char sd_pr_type(enum pr_type type)
-{
- switch (type) {
- case PR_WRITE_EXCLUSIVE:
- return 0x01;
- case PR_EXCLUSIVE_ACCESS:
- return 0x03;
- case PR_WRITE_EXCLUSIVE_REG_ONLY:
- return 0x05;
- case PR_EXCLUSIVE_ACCESS_REG_ONLY:
- return 0x06;
- case PR_WRITE_EXCLUSIVE_ALL_REGS:
- return 0x07;
- case PR_EXCLUSIVE_ACCESS_ALL_REGS:
- return 0x08;
- default:
- return 0;
- }
-};
-
static int sd_pr_out_command(struct block_device *bdev, u8 sa,
- u64 key, u64 sa_key, u8 type, u8 flags)
+ u64 key, u64 sa_key, enum scsi_pr_type type, u8 flags)
{
struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
struct scsi_device *sdev = sdkp->device;
@@ -1778,19 +1759,21 @@ static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
{
if (flags)
return -EOPNOTSUPP;
- return sd_pr_out_command(bdev, 0x01, key, 0, sd_pr_type(type), 0);
+ return sd_pr_out_command(bdev, 0x01, key, 0,
+ block_pr_type_to_scsi(type), 0);
}

static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
{
- return sd_pr_out_command(bdev, 0x02, key, 0, sd_pr_type(type), 0);
+ return sd_pr_out_command(bdev, 0x02, key, 0,
+ block_pr_type_to_scsi(type), 0);
}

static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
enum pr_type type, bool abort)
{
return sd_pr_out_command(bdev, abort ? 0x05 : 0x04, old_key, new_key,
- sd_pr_type(type), 0);
+ block_pr_type_to_scsi(type), 0);
}

static int sd_pr_clear(struct block_device *bdev, u64 key)
diff --git a/include/scsi/scsi_block_pr.h b/include/scsi/scsi_block_pr.h
new file mode 100644
index 000000000000..6e99f844330d
--- /dev/null
+++ b/include/scsi/scsi_block_pr.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _SCSI_BLOCK_PR_H
+#define _SCSI_BLOCK_PR_H
+
+#include <uapi/linux/pr.h>
+
+enum scsi_pr_type {
+ SCSI_PR_WRITE_EXCLUSIVE = 0x01,
+ SCSI_PR_EXCLUSIVE_ACCESS = 0x03,
+ SCSI_PR_WRITE_EXCLUSIVE_REG_ONLY = 0x05,
+ SCSI_PR_EXCLUSIVE_ACCESS_REG_ONLY = 0x06,
+ SCSI_PR_WRITE_EXCLUSIVE_ALL_REGS = 0x07,
+ SCSI_PR_EXCLUSIVE_ACCESS_ALL_REGS = 0x08,
+};
+
+static inline enum scsi_pr_type block_pr_type_to_scsi(enum pr_type type)
+{
+ switch (type) {
+ case PR_WRITE_EXCLUSIVE:
+ return SCSI_PR_WRITE_EXCLUSIVE;
+ case PR_EXCLUSIVE_ACCESS:
+ return SCSI_PR_EXCLUSIVE_ACCESS;
+ case PR_WRITE_EXCLUSIVE_REG_ONLY:
+ return SCSI_PR_WRITE_EXCLUSIVE_REG_ONLY;
+ case PR_EXCLUSIVE_ACCESS_REG_ONLY:
+ return SCSI_PR_EXCLUSIVE_ACCESS_REG_ONLY;
+ case PR_WRITE_EXCLUSIVE_ALL_REGS:
+ return SCSI_PR_WRITE_EXCLUSIVE_ALL_REGS;
+ case PR_EXCLUSIVE_ACCESS_ALL_REGS:
+ return SCSI_PR_EXCLUSIVE_ACCESS_ALL_REGS;
+ default:
+ return 0;
+ }
+};
+
+#endif
--
2.25.1