From b558f0cc4d19c04eb29832b37898f3fff5f006a8 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Mon, 1 Mar 2021 17:28:16 -0800 Subject: [PATCH] BACKPORT: f2fs: expose # of overprivision segments MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This is useful when checking conditions during checkpoint=disable in Android. Bug: 330501081 Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim (cherry picked from commit ed5309ad137e1f467ca1e1b61be3dc39d144316c) [hakan: Resolved minor conflict in Documentation/ABI/testing/sysfs-fs-f2fs] Signed-off-by: Håkan Kvist Change-Id: I0bd59501836fbe8fe361da2872ae660f3ac1f541 --- Documentation/ABI/testing/sysfs-fs-f2fs | 5 +++++ fs/f2fs/sysfs.c | 9 +++++++++ 2 files changed, 14 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 4bb93a06d8ab..e8daa3bf7c03 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -347,3 +347,8 @@ Date: April 2020 Contact: "Daeho Jeong" 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//ovp_segments +Date: March 2021 +Contact: "Jaegeuk Kim" +Description: Shows the number of overprovision segments. diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 15ebf922251c..461c21b4ac3b 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -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),