UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

dm: move zone related code to dm-zone.c 

Move core and table code used for zoned targets and conditionally
defined with #ifdef CONFIG_BLK_DEV_ZONED to the new file dm-zone.c.
This file is conditionally compiled depending on CONFIG_BLK_DEV_ZONED.
The small helper dm_set_zones_restrictions() is introduced to
initialize a mapped device request queue zone attributes in
dm_table_set_restrictions().

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Damien Le Moal 2021-05-26 06:24:56 +09:00 committed by Mike Snitzer
parent dd73c320ec
commit 7fc1872848
5 changed files with 119 additions and 89 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/md/Makefile
View File

@ -92,6 +92,10 @@ ifeq ($(CONFIG_DM_UEVENT),y)
dm-mod-objs += dm-uevent.o
endif
ifeq ($(CONFIG_BLK_DEV_ZONED),y)
dm-mod-objs += dm-zone.o
endif
ifeq ($(CONFIG_DM_VERITY_FEC),y)
dm-verity-objs += dm-verity-fec.o
endif

14
drivers/md/dm-table.c
View File

@ -2064,17 +2064,9 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
dm_table_any_dev_attr(t, device_is_not_random, NULL))
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
/*
* For a zoned target, the number of zones should be updated for the
* correct value to be exposed in sysfs queue/nr_zones. For a BIO based
* target, this is all that is needed.
*/
#ifdef CONFIG_BLK_DEV_ZONED
if (blk_queue_is_zoned(q)) {
WARN_ON_ONCE(queue_is_mq(q));
q->nr_zones = blkdev_nr_zones(t->md->disk);
}
#endif
/* For a zoned target, setup the zones related queue attributes */
if (blk_queue_is_zoned(q))
dm_set_zones_restrictions(t, q);
dm_update_keyslot_manager(q, t);
blk_queue_update_readahead(q);

101
drivers/md/dm-zone.c Normal file
View File

@ -0,0 +1,101 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2021 Western Digital Corporation or its affiliates.
*/
#include <linux/blkdev.h>
#include "dm-core.h"
/*
* User facing dm device block device report zone operation. This calls the
* report_zones operation for each target of a device table. This operation is
* generally implemented by targets using dm_report_zones().
*/
int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data)
{
struct mapped_device *md = disk->private_data;
struct dm_table *map;
int srcu_idx, ret;
struct dm_report_zones_args args = {
.next_sector = sector,
.orig_data = data,
.orig_cb = cb,
};
if (dm_suspended_md(md))
return -EAGAIN;
map = dm_get_live_table(md, &srcu_idx);
if (!map) {
ret = -EIO;
goto out;
}
do {
struct dm_target *tgt;
tgt = dm_table_find_target(map, args.next_sector);
if (WARN_ON_ONCE(!tgt->type->report_zones)) {
ret = -EIO;
goto out;
}
args.tgt = tgt;
ret = tgt->type->report_zones(tgt, &args,
nr_zones - args.zone_idx);
if (ret < 0)
goto out;
} while (args.zone_idx < nr_zones &&
args.next_sector < get_capacity(disk));
ret = args.zone_idx;
out:
dm_put_live_table(md, srcu_idx);
return ret;
}
int dm_report_zones_cb(struct blk_zone *zone, unsigned int idx, void *data)
{
struct dm_report_zones_args *args = data;
sector_t sector_diff = args->tgt->begin - args->start;
/*
* Ignore zones beyond the target range.
*/
if (zone->start >= args->start + args->tgt->len)
return 0;
/*
* Remap the start sector and write pointer position of the zone
* to match its position in the target range.
*/
zone->start += sector_diff;
if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL) {
if (zone->cond == BLK_ZONE_COND_FULL)
zone->wp = zone->start + zone->len;
else if (zone->cond == BLK_ZONE_COND_EMPTY)
zone->wp = zone->start;
else
zone->wp += sector_diff;
}
args->next_sector = zone->start + zone->len;
return args->orig_cb(zone, args->zone_idx++, args->orig_data);
}
EXPORT_SYMBOL_GPL(dm_report_zones_cb);
void dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q)
{
if (!blk_queue_is_zoned(q))
return;
/*
* For a zoned target, the number of zones should be updated for the
* correct value to be exposed in sysfs queue/nr_zones. For a BIO based
* target, this is all that is needed.
*/
WARN_ON_ONCE(queue_is_mq(q));
q->nr_zones = blkdev_nr_zones(t->md->disk);
}

78
drivers/md/dm.c
View File

@ -444,84 +444,6 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
return dm_get_geometry(md, geo);
}
#ifdef CONFIG_BLK_DEV_ZONED
int dm_report_zones_cb(struct blk_zone *zone, unsigned int idx, void *data)
{
struct dm_report_zones_args *args = data;
sector_t sector_diff = args->tgt->begin - args->start;
/*
* Ignore zones beyond the target range.
*/
if (zone->start >= args->start + args->tgt->len)
return 0;
/*
* Remap the start sector and write pointer position of the zone
* to match its position in the target range.
*/
zone->start += sector_diff;
if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL) {
if (zone->cond == BLK_ZONE_COND_FULL)
zone->wp = zone->start + zone->len;
else if (zone->cond == BLK_ZONE_COND_EMPTY)
zone->wp = zone->start;
else
zone->wp += sector_diff;
}
args->next_sector = zone->start + zone->len;
return args->orig_cb(zone, args->zone_idx++, args->orig_data);
}
EXPORT_SYMBOL_GPL(dm_report_zones_cb);
static int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data)
{
struct mapped_device *md = disk->private_data;
struct dm_table *map;
int srcu_idx, ret;
struct dm_report_zones_args args = {
.next_sector = sector,
.orig_data = data,
.orig_cb = cb,
};
if (dm_suspended_md(md))
return -EAGAIN;
map = dm_get_live_table(md, &srcu_idx);
if (!map) {
ret = -EIO;
goto out;
}
do {
struct dm_target *tgt;
tgt = dm_table_find_target(map, args.next_sector);
if (WARN_ON_ONCE(!tgt->type->report_zones)) {
ret = -EIO;
goto out;
}
args.tgt = tgt;
ret = tgt->type->report_zones(tgt, &args,
nr_zones - args.zone_idx);
if (ret < 0)
goto out;
} while (args.zone_idx < nr_zones &&
args.next_sector < get_capacity(disk));
ret = args.zone_idx;
out:
dm_put_live_table(md, srcu_idx);
return ret;
}
#else
#define dm_blk_report_zones NULL
#endif /* CONFIG_BLK_DEV_ZONED */
static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx,
struct block_device **bdev)
{

11
drivers/md/dm.h
View File

@ -100,6 +100,17 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
*/
#define dm_target_hybrid(t) (dm_target_bio_based(t) && dm_target_request_based(t))
/*
* Zoned targets related functions.
*/
void dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q);
#ifdef CONFIG_BLK_DEV_ZONED
int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data);
#else
#define dm_blk_report_zones NULL
#endif
/*-----------------------------------------------------------------
* A registry of target types.
*---------------------------------------------------------------*/