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BACKPORT: f2fs: expose # of overprivision segments

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

Bug: 330501081
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit ed5309ad137e1f467ca1e1b61be3dc39d144316c)
[hakan: Resolved minor conflict in Documentation/ABI/testing/sysfs-fs-f2fs]
Signed-off-by: Håkan Kvist <hakan.kvist@sony.com>
Change-Id: I0bd59501836fbe8fe361da2872ae660f3ac1f541
This commit is contained in:
Jaegeuk Kim 2021-03-01 17:28:16 -08:00 committed by Daniel Rosenberg
parent ffb0cc5261
commit b558f0cc4d
2 changed files with 14 additions and 0 deletions
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5
Documentation/ABI/testing/sysfs-fs-f2fs
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@ -347,3 +347,8 @@ Date: April 2020
Contact: "Daeho Jeong" <daehojeong@google.com>
Description: Give a way to change iostat_period time. 3secs by default.
The new iostat trace gives stats gap given the period.
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

@ -87,6 +87,13 @@ 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)
{
@ -570,6 +577,7 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
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);
@ -659,6 +667,7 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(node_io_flag),
ATTR_LIST(dirty_segments),
ATTR_LIST(free_segments),
ATTR_LIST(ovp_segments),
ATTR_LIST(unusable),
ATTR_LIST(lifetime_write_kbytes),
ATTR_LIST(features),