mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-01 08:04:22 +08:00
a3d8a25736
Currently, for zoned disks, since blk_revalidate_disk_zones() requires the disk capacity to be set already to operate correctly, zones revalidation can only be done on the second revalidate scan once the gendisk capacity is set at the end of the first scan. As a result, if zone revalidation fails, there is no second chance to recover from the failure and the disk capacity is changed to 0, with the disk left unusable. This can be improved by shuffling around code, specifically, by moving the call to sd_zbc_revalidate_zones() from sd_zbc_read_zones() to the end of sd_revalidate_disk(), after set_capacity_revalidate_and_notify() is called to set the gendisk capacity. With this change, if sd_zbc_revalidate_zones() fails on the first scan, the second scan will call it again to recover, if possible. Using the new struct scsi_disk fields rev_nr_zones and rev_zone_blocks, sd_zbc_revalidate_zones() does actual work only if it detects a change with the disk zone configuration. This means that for a successful zones revalidation on the first scan, the second scan will not cause another heavy full check. While at it, remove the unecesary "extern" declaration of sd_zbc_read_zones(). Link: https://lore.kernel.org/r/20200731054928.668547-1-damien.lemoal@wdc.com Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
280 lines
7.0 KiB
C
280 lines
7.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _SCSI_DISK_H
|
|
#define _SCSI_DISK_H
|
|
|
|
/*
|
|
* More than enough for everybody ;) The huge number of majors
|
|
* is a leftover from 16bit dev_t days, we don't really need that
|
|
* much numberspace.
|
|
*/
|
|
#define SD_MAJORS 16
|
|
|
|
/*
|
|
* Time out in seconds for disks and Magneto-opticals (which are slower).
|
|
*/
|
|
#define SD_TIMEOUT (30 * HZ)
|
|
#define SD_MOD_TIMEOUT (75 * HZ)
|
|
/*
|
|
* Flush timeout is a multiplier over the standard device timeout which is
|
|
* user modifiable via sysfs but initially set to SD_TIMEOUT
|
|
*/
|
|
#define SD_FLUSH_TIMEOUT_MULTIPLIER 2
|
|
#define SD_WRITE_SAME_TIMEOUT (120 * HZ)
|
|
|
|
/*
|
|
* Number of allowed retries
|
|
*/
|
|
#define SD_MAX_RETRIES 5
|
|
#define SD_PASSTHROUGH_RETRIES 1
|
|
#define SD_MAX_MEDIUM_TIMEOUTS 2
|
|
|
|
/*
|
|
* Size of the initial data buffer for mode and read capacity data
|
|
*/
|
|
#define SD_BUF_SIZE 512
|
|
|
|
/*
|
|
* Number of sectors at the end of the device to avoid multi-sector
|
|
* accesses to in the case of last_sector_bug
|
|
*/
|
|
#define SD_LAST_BUGGY_SECTORS 8
|
|
|
|
enum {
|
|
SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
|
|
SD_MEMPOOL_SIZE = 2, /* CDB pool size */
|
|
};
|
|
|
|
enum {
|
|
SD_DEF_XFER_BLOCKS = 0xffff,
|
|
SD_MAX_XFER_BLOCKS = 0xffffffff,
|
|
SD_MAX_WS10_BLOCKS = 0xffff,
|
|
SD_MAX_WS16_BLOCKS = 0x7fffff,
|
|
};
|
|
|
|
enum {
|
|
SD_LBP_FULL = 0, /* Full logical block provisioning */
|
|
SD_LBP_UNMAP, /* Use UNMAP command */
|
|
SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */
|
|
SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */
|
|
SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */
|
|
SD_LBP_DISABLE, /* Discard disabled due to failed cmd */
|
|
};
|
|
|
|
enum {
|
|
SD_ZERO_WRITE = 0, /* Use WRITE(10/16) command */
|
|
SD_ZERO_WS, /* Use WRITE SAME(10/16) command */
|
|
SD_ZERO_WS16_UNMAP, /* Use WRITE SAME(16) with UNMAP */
|
|
SD_ZERO_WS10_UNMAP, /* Use WRITE SAME(10) with UNMAP */
|
|
};
|
|
|
|
struct scsi_disk {
|
|
struct scsi_driver *driver; /* always &sd_template */
|
|
struct scsi_device *device;
|
|
struct device dev;
|
|
struct gendisk *disk;
|
|
struct opal_dev *opal_dev;
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
u32 nr_zones;
|
|
u32 rev_nr_zones;
|
|
u32 zone_blocks;
|
|
u32 rev_zone_blocks;
|
|
u32 zones_optimal_open;
|
|
u32 zones_optimal_nonseq;
|
|
u32 zones_max_open;
|
|
u32 *zones_wp_offset;
|
|
spinlock_t zones_wp_offset_lock;
|
|
u32 *rev_wp_offset;
|
|
struct mutex rev_mutex;
|
|
struct work_struct zone_wp_offset_work;
|
|
char *zone_wp_update_buf;
|
|
#endif
|
|
atomic_t openers;
|
|
sector_t capacity; /* size in logical blocks */
|
|
u32 max_xfer_blocks;
|
|
u32 opt_xfer_blocks;
|
|
u32 max_ws_blocks;
|
|
u32 max_unmap_blocks;
|
|
u32 unmap_granularity;
|
|
u32 unmap_alignment;
|
|
u32 index;
|
|
unsigned int physical_block_size;
|
|
unsigned int max_medium_access_timeouts;
|
|
unsigned int medium_access_timed_out;
|
|
u8 media_present;
|
|
u8 write_prot;
|
|
u8 protection_type;/* Data Integrity Field */
|
|
u8 provisioning_mode;
|
|
u8 zeroing_mode;
|
|
unsigned ATO : 1; /* state of disk ATO bit */
|
|
unsigned cache_override : 1; /* temp override of WCE,RCD */
|
|
unsigned WCE : 1; /* state of disk WCE bit */
|
|
unsigned RCD : 1; /* state of disk RCD bit, unused */
|
|
unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
|
|
unsigned first_scan : 1;
|
|
unsigned lbpme : 1;
|
|
unsigned lbprz : 1;
|
|
unsigned lbpu : 1;
|
|
unsigned lbpws : 1;
|
|
unsigned lbpws10 : 1;
|
|
unsigned lbpvpd : 1;
|
|
unsigned ws10 : 1;
|
|
unsigned ws16 : 1;
|
|
unsigned rc_basis: 2;
|
|
unsigned zoned: 2;
|
|
unsigned urswrz : 1;
|
|
unsigned security : 1;
|
|
unsigned ignore_medium_access_errors : 1;
|
|
};
|
|
#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
|
|
|
|
static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
|
|
{
|
|
return container_of(disk->private_data, struct scsi_disk, driver);
|
|
}
|
|
|
|
#define sd_printk(prefix, sdsk, fmt, a...) \
|
|
(sdsk)->disk ? \
|
|
sdev_prefix_printk(prefix, (sdsk)->device, \
|
|
(sdsk)->disk->disk_name, fmt, ##a) : \
|
|
sdev_printk(prefix, (sdsk)->device, fmt, ##a)
|
|
|
|
#define sd_first_printk(prefix, sdsk, fmt, a...) \
|
|
do { \
|
|
if ((sdsk)->first_scan) \
|
|
sd_printk(prefix, sdsk, fmt, ##a); \
|
|
} while (0)
|
|
|
|
static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
|
|
{
|
|
switch (scmd->cmnd[0]) {
|
|
case READ_6:
|
|
case READ_10:
|
|
case READ_12:
|
|
case READ_16:
|
|
case SYNCHRONIZE_CACHE:
|
|
case VERIFY:
|
|
case VERIFY_12:
|
|
case VERIFY_16:
|
|
case WRITE_6:
|
|
case WRITE_10:
|
|
case WRITE_12:
|
|
case WRITE_16:
|
|
case WRITE_SAME:
|
|
case WRITE_SAME_16:
|
|
case UNMAP:
|
|
return 1;
|
|
case VARIABLE_LENGTH_CMD:
|
|
switch (scmd->cmnd[9]) {
|
|
case READ_32:
|
|
case VERIFY_32:
|
|
case WRITE_32:
|
|
case WRITE_SAME_32:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks)
|
|
{
|
|
return blocks << (ilog2(sdev->sector_size) - 9);
|
|
}
|
|
|
|
static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks)
|
|
{
|
|
return blocks * sdev->sector_size;
|
|
}
|
|
|
|
static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes)
|
|
{
|
|
return bytes >> ilog2(sdev->sector_size);
|
|
}
|
|
|
|
static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector)
|
|
{
|
|
return sector >> (ilog2(sdev->sector_size) - 9);
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INTEGRITY
|
|
|
|
extern void sd_dif_config_host(struct scsi_disk *);
|
|
|
|
#else /* CONFIG_BLK_DEV_INTEGRITY */
|
|
|
|
static inline void sd_dif_config_host(struct scsi_disk *disk)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_BLK_DEV_INTEGRITY */
|
|
|
|
static inline int sd_is_zoned(struct scsi_disk *sdkp)
|
|
{
|
|
return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC;
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
|
|
int sd_zbc_init_disk(struct scsi_disk *sdkp);
|
|
void sd_zbc_release_disk(struct scsi_disk *sdkp);
|
|
int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer);
|
|
int sd_zbc_revalidate_zones(struct scsi_disk *sdkp);
|
|
blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd,
|
|
unsigned char op, bool all);
|
|
unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
|
|
struct scsi_sense_hdr *sshdr);
|
|
int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
|
|
unsigned int nr_zones, report_zones_cb cb, void *data);
|
|
|
|
blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, sector_t *lba,
|
|
unsigned int nr_blocks);
|
|
|
|
#else /* CONFIG_BLK_DEV_ZONED */
|
|
|
|
static inline int sd_zbc_init_disk(struct scsi_disk *sdkp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sd_zbc_release_disk(struct scsi_disk *sdkp) {}
|
|
|
|
static inline int sd_zbc_read_zones(struct scsi_disk *sdkp,
|
|
unsigned char *buf)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int sd_zbc_revalidate_zones(struct scsi_disk *sdkp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd,
|
|
unsigned char op,
|
|
bool all)
|
|
{
|
|
return BLK_STS_TARGET;
|
|
}
|
|
|
|
static inline unsigned int sd_zbc_complete(struct scsi_cmnd *cmd,
|
|
unsigned int good_bytes, struct scsi_sense_hdr *sshdr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd,
|
|
sector_t *lba,
|
|
unsigned int nr_blocks)
|
|
{
|
|
return BLK_STS_TARGET;
|
|
}
|
|
|
|
#define sd_zbc_report_zones NULL
|
|
|
|
#endif /* CONFIG_BLK_DEV_ZONED */
|
|
|
|
void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr);
|
|
void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result);
|
|
|
|
#endif /* _SCSI_DISK_H */
|