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f2fs: expose # of overprivision segments 

This is useful when checking conditions during checkpoint=disable in Android.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2021-03-01 17:28:16 -08:00
parent 3c0315424f
commit 0823427989
2 changed files with 14 additions and 0 deletions
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5
Documentation/ABI/testing/sysfs-fs-f2fs
View File

@ -409,3 +409,8 @@ Description: Give a way to change checkpoint merge daemon's io priority.
I/O priority "3". We can select the class between "rt" and "be",
and set the I/O priority within valid range of it. "," delimiter
is necessary in between I/O class and priority number.
What: /sys/fs/f2fs/<disk>/ovp_segments
Date: March 2021
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description: Shows the number of overprovision segments.

9
fs/f2fs/sysfs.c
View File

@ -91,6 +91,13 @@ static ssize_t free_segments_show(struct f2fs_attr *a,
(unsigned long long)(free_segments(sbi)));
}
static ssize_t ovp_segments_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return sprintf(buf, "%llu\n",
(unsigned long long)(overprovision_segments(sbi)));
}
static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
@ -629,6 +636,7 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
F2FS_GENERAL_RO_ATTR(dirty_segments);
F2FS_GENERAL_RO_ATTR(free_segments);
F2FS_GENERAL_RO_ATTR(ovp_segments);
F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
F2FS_GENERAL_RO_ATTR(features);
F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
@ -715,6 +723,7 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(ckpt_thread_ioprio),
ATTR_LIST(dirty_segments),
ATTR_LIST(free_segments),
ATTR_LIST(ovp_segments),
ATTR_LIST(unusable),
ATTR_LIST(lifetime_write_kbytes),
ATTR_LIST(features),