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f2fs: add a sysfs entry to show max open zones 

This patch adds a sysfs entry showing the max zones that F2FS can write
concurrently.

Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
pull/1354/merge
Yongpeng Yang 2025-11-10 16:22:22 +08:00 committed by Jaegeuk Kim
parent 581251e030
commit 8973201789
2 changed files with 8 additions and 0 deletions
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6
Documentation/ABI/testing/sysfs-fs-f2fs
View File

@ -643,6 +643,12 @@ Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description: Shows the number of unusable blocks in a section which was defined by
the zone capacity reported by underlying zoned device.
What: /sys/fs/f2fs/<disk>/max_open_zones
Date: November 2025
Contact: "Yongpeng Yang" <yangyongpeng@xiaomi.com>
Description: Shows the max number of zones that F2FS can write concurrently when a zoned
device is mounted.
What: /sys/fs/f2fs/<disk>/current_atomic_write
Date: July 2022
Contact: "Daeho Jeong" <daehojeong@google.com>

2
fs/f2fs/sysfs.c
View File

@ -1213,6 +1213,7 @@ F2FS_SBI_GENERAL_RW_ATTR(last_age_weight);
F2FS_SBI_GENERAL_RW_ATTR(max_read_extent_count);
#ifdef CONFIG_BLK_DEV_ZONED
F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
F2FS_SBI_GENERAL_RO_ATTR(max_open_zones);
F2FS_SBI_GENERAL_RW_ATTR(blkzone_alloc_policy);
#endif
F2FS_SBI_GENERAL_RW_ATTR(carve_out);
@ -1388,6 +1389,7 @@ static struct attribute *f2fs_attrs[] = {
#endif
#ifdef CONFIG_BLK_DEV_ZONED
ATTR_LIST(unusable_blocks_per_sec),
ATTR_LIST(max_open_zones),
ATTR_LIST(blkzone_alloc_policy),
#endif
#ifdef CONFIG_F2FS_FS_COMPRESSION