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f2fs: Reset sequential zones on zoned block devices

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commit f46e8809e8 upstream.

When a zoned block device is mounted, discarding sections
contained in sequential zones must reset the zone write pointer.
For sections contained in conventional zones, the regular discard
is used if the drive supports it.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Damien Le Moal
2016-10-28 17:45:06 +09:00
committed by Amit Pundir
parent 72f2351ba7
commit 5558039d0b
1 changed files with 45 additions and 0 deletions
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45
fs/f2fs/segment.c
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@@ -16,6 +16,7 @@
#include <linux/kthread.h>
#include <linux/swap.h>
#include <linux/timer.h>
#include <linux/timer.h>
#include "f2fs.h"
#include "segment.h"
@@ -584,6 +585,45 @@ static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
mutex_unlock(&dirty_i->seglist_lock);
}
#ifdef CONFIG_BLK_DEV_ZONED
static int f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
block_t blkstart, block_t blklen)
{
sector_t sector = SECTOR_FROM_BLOCK(blkstart);
sector_t nr_sects = SECTOR_FROM_BLOCK(blklen);
struct block_device *bdev = sbi->sb->s_bdev;
if (nr_sects != bdev_zone_size(bdev)) {
f2fs_msg(sbi->sb, KERN_INFO,
"Unaligned discard attempted (sector %llu + %llu)",
(unsigned long long)sector,
(unsigned long long)nr_sects);
return -EIO;
}
/*
* We need to know the type of the zone: for conventional zones,
* use regular discard if the drive supports it. For sequential
* zones, reset the zone write pointer.
*/
switch (get_blkz_type(sbi, blkstart)) {
case BLK_ZONE_TYPE_CONVENTIONAL:
if (!blk_queue_discard(bdev_get_queue(bdev)))
return 0;
return blkdev_issue_discard(bdev, sector, nr_sects,
GFP_NOFS, 0);
case BLK_ZONE_TYPE_SEQWRITE_REQ:
case BLK_ZONE_TYPE_SEQWRITE_PREF:
return blkdev_reset_zones(bdev, sector,
nr_sects, GFP_NOFS);
default:
/* Unknown zone type: broken device ? */
return -EIO;
}
}
#endif
static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
block_t blkstart, block_t blklen)
{
@@ -601,6 +641,11 @@ static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
sbi->discard_blks--;
}
trace_f2fs_issue_discard(sbi->sb, blkstart, blklen);
#ifdef CONFIG_BLK_DEV_ZONED
if (f2fs_sb_mounted_blkzoned(sbi->sb))
return f2fs_issue_discard_zone(sbi, blkstart, blklen);
#endif
return blkdev_issue_discard(sbi->sb->s_bdev, start, len, GFP_NOFS, 0);
}