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scsi: Move sd_pr_type to scsi_common

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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 scsi_common and renames it. 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>
Link: https://lore.kernel.org/r/20230407200551.12660-5-michael.christie@oracle.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Mike Christie 2023-04-07 15:05:37 -05:00 committed by Martin K. Petersen
parent 20bebccbc4
commit 0730b1632b
3 changed files with 42 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/scsi/scsi_common.c
View File

@ -8,6 +8,7 @@
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <uapi/linux/pr.h>
#include <asm/unaligned.h>
#include <scsi/scsi_common.h>
@ -63,6 +64,27 @@ const char *scsi_device_type(unsigned type)
}
EXPORT_SYMBOL(scsi_device_type);
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;
}
return 0;
}
EXPORT_SYMBOL_GPL(block_pr_type_to_scsi);
/**
* scsilun_to_int - convert a scsi_lun to an int
* @scsilun: struct scsi_lun to be converted.

33
drivers/scsi/sd.c
View File

@ -67,6 +67,7 @@
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_common.h>
#include "sd.h"
#include "scsi_priv.h"
@ -1692,26 +1693,6 @@ out_unlock:
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_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result)
{
switch (host_byte(result)) {
@ -1742,8 +1723,8 @@ static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result)
}
}
static int sd_pr_out_command(struct block_device *bdev, u8 sa,
u64 key, u64 sa_key, u8 type, u8 flags)
static int sd_pr_out_command(struct block_device *bdev, u8 sa, 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;
@ -1795,19 +1776,21 @@ 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)

12
include/scsi/scsi_common.h
View File

@ -7,8 +7,20 @@
#define _SCSI_COMMON_H_
#include <linux/types.h>
#include <uapi/linux/pr.h>
#include <scsi/scsi_proto.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,
};
enum scsi_pr_type block_pr_type_to_scsi(enum pr_type type);
static inline unsigned
scsi_varlen_cdb_length(const void *hdr)
{