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block: Kill gfp_t argument of blkdev_report_zones() 

Only GFP_KERNEL and GFP_NOIO are used with blkdev_report_zones(). In
preparation of using vmalloc() for large report buffer and zone array
allocations used by this function, remove its "gfp_t gfp_mask" argument
and rely on the caller context to use memalloc_noio_save/restore() where
necessary (block layer zone revalidation and dm-zoned I/O error path).

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal 2019-07-01 14:09:16 +09:00 committed by Jens Axboe
parent b4c5875d36
commit bd976e5272
12 changed files with 46 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
block/blk-zoned.c
View File

@ -14,6 +14,7 @@
#include <linux/rbtree.h>
#include <linux/blkdev.h>
#include <linux/blk-mq.h>
#include <linux/sched/mm.h>
#include "blk.h"
@ -117,8 +118,7 @@ static bool blkdev_report_zone(struct block_device *bdev, struct blk_zone *rep)
}
static int blk_report_zones(struct gendisk *disk, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask)
struct blk_zone *zones, unsigned int *nr_zones)
{
struct request_queue *q = disk->queue;
unsigned int z = 0, n, nrz = *nr_zones;
@ -127,8 +127,7 @@ static int blk_report_zones(struct gendisk *disk, sector_t sector,
while (z < nrz && sector < capacity) {
n = nrz - z;
ret = disk->fops->report_zones(disk, sector, &zones[z], &n,
gfp_mask);
ret = disk->fops->report_zones(disk, sector, &zones[z], &n);
if (ret)
return ret;
if (!n)
@ -149,17 +148,18 @@ static int blk_report_zones(struct gendisk *disk, sector_t sector,
* @sector: Sector from which to report zones
* @zones: Array of zone structures where to return the zones information
* @nr_zones: Number of zone structures in the zone array
* @gfp_mask: Memory allocation flags (for bio_alloc)
*
* Description:
* Get zone information starting from the zone containing @sector.
* The number of zone information reported may be less than the number
* requested by @nr_zones. The number of zones actually reported is
* returned in @nr_zones.
* The caller must use memalloc_noXX_save/restore() calls to control
* memory allocations done within this function (zone array and command
* buffer allocation by the device driver).
*/
int blkdev_report_zones(struct block_device *bdev, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask)
struct blk_zone *zones, unsigned int *nr_zones)
{
struct request_queue *q = bdev_get_queue(bdev);
unsigned int i, nrz;
@ -184,7 +184,7 @@ int blkdev_report_zones(struct block_device *bdev, sector_t sector,
nrz = min(*nr_zones,
__blkdev_nr_zones(q, bdev->bd_part->nr_sects - sector));
ret = blk_report_zones(bdev->bd_disk, get_start_sect(bdev) + sector,
zones, &nrz, gfp_mask);
zones, &nrz);
if (ret)
return ret;
@ -305,9 +305,7 @@ int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
if (!zones)
return -ENOMEM;
ret = blkdev_report_zones(bdev, rep.sector,
zones, &rep.nr_zones,
GFP_KERNEL);
ret = blkdev_report_zones(bdev, rep.sector, zones, &rep.nr_zones);
if (ret)
goto out;
@ -415,6 +413,7 @@ int blk_revalidate_disk_zones(struct gendisk *disk)
unsigned long *seq_zones_wlock = NULL, *seq_zones_bitmap = NULL;
unsigned int i, rep_nr_zones = 0, z = 0, nrz;
struct blk_zone *zones = NULL;
unsigned int noio_flag;
sector_t sector = 0;
int ret = 0;
@ -427,6 +426,12 @@ int blk_revalidate_disk_zones(struct gendisk *disk)
return 0;
}
/*
* Ensure that all memory allocations in this context are done as
* if GFP_NOIO was specified.
*/
noio_flag = memalloc_noio_save();
if (!blk_queue_is_zoned(q) || !nr_zones) {
nr_zones = 0;
goto update;
@ -449,7 +454,7 @@ int blk_revalidate_disk_zones(struct gendisk *disk)
while (z < nr_zones) {
nrz = min(nr_zones - z, rep_nr_zones);
ret = blk_report_zones(disk, sector, zones, &nrz, GFP_NOIO);
ret = blk_report_zones(disk, sector, zones, &nrz);
if (ret)
goto out;
if (!nrz)
@ -480,6 +485,8 @@ int blk_revalidate_disk_zones(struct gendisk *disk)
blk_mq_unfreeze_queue(q);
out:
memalloc_noio_restore(noio_flag);
free_pages((unsigned long)zones,
get_order(rep_nr_zones * sizeof(struct blk_zone)));
kfree(seq_zones_wlock);

3
drivers/block/null_blk.h
View File

@ -89,8 +89,7 @@ struct nullb {
int null_zone_init(struct nullb_device *dev);
void null_zone_exit(struct nullb_device *dev);
int null_zone_report(struct gendisk *disk, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask);
struct blk_zone *zones, unsigned int *nr_zones);
void null_zone_write(struct nullb_cmd *cmd, sector_t sector,
unsigned int nr_sectors);
void null_zone_reset(struct nullb_cmd *cmd, sector_t sector);

3
drivers/block/null_blk_zoned.c
View File

@ -67,8 +67,7 @@ void null_zone_exit(struct nullb_device *dev)
}
int null_zone_report(struct gendisk *disk, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask)
struct blk_zone *zones, unsigned int *nr_zones)
{
struct nullb *nullb = disk->private_data;
struct nullb_device *dev = nullb->dev;

5
drivers/md/dm-flakey.c
View File

@ -461,15 +461,14 @@ static int flakey_prepare_ioctl(struct dm_target *ti, struct block_device **bdev
#ifdef CONFIG_BLK_DEV_ZONED
static int flakey_report_zones(struct dm_target *ti, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask)
struct blk_zone *zones, unsigned int *nr_zones)
{
struct flakey_c *fc = ti->private;
int ret;
/* Do report and remap it */
ret = blkdev_report_zones(fc->dev->bdev, flakey_map_sector(ti, sector),
zones, nr_zones, gfp_mask);
zones, nr_zones);
if (ret != 0)
return ret;

5
drivers/md/dm-linear.c
View File

@ -137,15 +137,14 @@ static int linear_prepare_ioctl(struct dm_target *ti, struct block_device **bdev
#ifdef CONFIG_BLK_DEV_ZONED
static int linear_report_zones(struct dm_target *ti, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask)
struct blk_zone *zones, unsigned int *nr_zones)
{
struct linear_c *lc = (struct linear_c *) ti->private;
int ret;
/* Do report and remap it */
ret = blkdev_report_zones(lc->dev->bdev, linear_map_sector(ti, sector),
zones, nr_zones, gfp_mask);
zones, nr_zones);
if (ret != 0)
return ret;

16
drivers/md/dm-zoned-metadata.c
View File

@ -8,6 +8,7 @@
#include <linux/module.h>
#include <linux/crc32.h>
#include <linux/sched/mm.h>
#define DM_MSG_PREFIX "zoned metadata"
@ -1162,8 +1163,7 @@ static int dmz_init_zones(struct dmz_metadata *zmd)
while (sector < dev->capacity) {
/* Get zone information */
nr_blkz = DMZ_REPORT_NR_ZONES;
ret = blkdev_report_zones(dev->bdev, sector, blkz,
&nr_blkz, GFP_KERNEL);
ret = blkdev_report_zones(dev->bdev, sector, blkz, &nr_blkz);
if (ret) {
dmz_dev_err(dev, "Report zones failed %d", ret);
goto out;
@ -1201,12 +1201,20 @@ static int dmz_init_zones(struct dmz_metadata *zmd)
static int dmz_update_zone(struct dmz_metadata *zmd, struct dm_zone *zone)
{
unsigned int nr_blkz = 1;
unsigned int noio_flag;
struct blk_zone blkz;
int ret;
/* Get zone information from disk */
/*
* Get zone information from disk. Since blkdev_report_zones() uses
* GFP_KERNEL by default for memory allocations, set the per-task
* PF_MEMALLOC_NOIO flag so that all allocations are done as if
* GFP_NOIO was specified.
*/
noio_flag = memalloc_noio_save();
ret = blkdev_report_zones(zmd->dev->bdev, dmz_start_sect(zmd, zone),
&blkz, &nr_blkz, GFP_NOIO);
&blkz, &nr_blkz);
memalloc_noio_restore(noio_flag);
if (!nr_blkz)
ret = -EIO;
if (ret) {

6
drivers/md/dm.c
View File

@ -441,8 +441,7 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
}
static int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask)
struct blk_zone *zones, unsigned int *nr_zones)
{
#ifdef CONFIG_BLK_DEV_ZONED
struct mapped_device *md = disk->private_data;
@ -480,8 +479,7 @@ static int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
* So there is no need to loop here trying to fill the entire array
* of zones.
*/
ret = tgt->type->report_zones(tgt, sector, zones,
nr_zones, gfp_mask);
ret = tgt->type->report_zones(tgt, sector, zones, nr_zones);
out:
dm_put_live_table(md, srcu_idx);

3
drivers/scsi/sd.h
View File

@ -213,8 +213,7 @@ extern blk_status_t sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd);
extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
struct scsi_sense_hdr *sshdr);
extern int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask);
struct blk_zone *zones, unsigned int *nr_zones);
#else /* CONFIG_BLK_DEV_ZONED */

6
drivers/scsi/sd_zbc.c
View File

@ -109,13 +109,11 @@ static int sd_zbc_do_report_zones(struct scsi_disk *sdkp, unsigned char *buf,
* @sector: Start 512B sector of the report
* @zones: Array of zone descriptors
* @nr_zones: Number of descriptors in the array
* @gfp_mask: Memory allocation mask
*
* Execute a report zones command on the target disk.
*/
int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask)
struct blk_zone *zones, unsigned int *nr_zones)
{
struct scsi_disk *sdkp = scsi_disk(disk);
unsigned int i, buflen, nrz = *nr_zones;
@ -134,7 +132,7 @@ int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
*/
buflen = min(queue_max_hw_sectors(disk->queue) << 9,
roundup((nrz + 1) * 64, 512));
buf = kmalloc(buflen, gfp_mask);
buf = kmalloc(buflen, GFP_KERNEL);
if (!buf)
return -ENOMEM;

4
fs/f2fs/super.c
View File

@ -2841,9 +2841,7 @@ static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
while (zones && sector < nr_sectors) {
nr_zones = F2FS_REPORT_NR_ZONES;
err = blkdev_report_zones(bdev, sector,
zones, &nr_zones,
GFP_KERNEL);
err = blkdev_report_zones(bdev, sector, zones, &nr_zones);
if (err)
break;
if (!nr_zones) {

5
include/linux/blkdev.h
View File

@ -347,7 +347,7 @@ struct queue_limits {
extern unsigned int blkdev_nr_zones(struct block_device *bdev);
extern int blkdev_report_zones(struct block_device *bdev,
sector_t sector, struct blk_zone *zones,
unsigned int *nr_zones, gfp_t gfp_mask);
unsigned int *nr_zones);
extern int blkdev_reset_zones(struct block_device *bdev, sector_t sectors,
sector_t nr_sectors, gfp_t gfp_mask);
extern int blk_revalidate_disk_zones(struct gendisk *disk);
@ -1673,8 +1673,7 @@ struct block_device_operations {
/* this callback is with swap_lock and sometimes page table lock held */
void (*swap_slot_free_notify) (struct block_device *, unsigned long);
int (*report_zones)(struct gendisk *, sector_t sector,
struct blk_zone *zones, unsigned int *nr_zones,
gfp_t gfp_mask);
struct blk_zone *zones, unsigned int *nr_zones);
struct module *owner;
const struct pr_ops *pr_ops;
};

3
include/linux/device-mapper.h
View File

@ -95,8 +95,7 @@ typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **
typedef int (*dm_report_zones_fn) (struct dm_target *ti, sector_t sector,
struct blk_zone *zones,
unsigned int *nr_zones,
gfp_t gfp_mask);
unsigned int *nr_zones);
/*
* These iteration functions are typically used to check (and combine)