Commit a3951cd1 authored by Yangtao Li's avatar Yangtao Li Committed by Jaegeuk Kim
Browse files

f2fs: introduce gc_mode sysfs node 



Revert "f2fs: make gc_urgent and gc_segment_mode sysfs node readable".

Add a gc_mode sysfs node to show the current gc_mode as a string.

Signed-off-by: default avatarYangtao Li <frank.li@vivo.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 7b02b220

Documentation/ABI/testing/sysfs-fs-f2fs

+6 −0
Original line number Diff line number Diff line
@@ -640,3 +640,9 @@ Date: July 2022 
Contact:	"Daeho Jeong" <daehojeong@google.com>

Description:	Show the accumulated total revoked atomic write block count after boot.

		If you write "0" here, you can initialize to "0".



What:		/sys/fs/f2fs/<disk>/gc_mode

Date:		October 2022

Contact:	"Yangtao Li" <frank.li@vivo.com>

Description:	Show the current gc_mode as a string.

		This is a read-only entry.

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -1319,6 +1319,7 @@ enum { 
	MAX_TIME,

};



/* Note that you need to keep synchronization with this gc_mode_names array */

enum {

	GC_NORMAL,

	GC_IDLE_CB,

fs/f2fs/sysfs.c

+9 −6
Original line number Diff line number Diff line
@@ -143,6 +143,12 @@ static ssize_t pending_discard_show(struct f2fs_attr *a, 
				&SM_I(sbi)->dcc_info->discard_cmd_cnt));

}



static ssize_t gc_mode_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{

	return sysfs_emit(buf, "%s\n", gc_mode_names[sbi->gc_mode]);

}



static ssize_t features_show(struct f2fs_attr *a,

		struct f2fs_sb_info *sbi, char *buf)

{
@@ -332,13 +338,8 @@ static ssize_t f2fs_sbi_show(struct f2fs_attr *a, 
		return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);

#endif



	if (!strcmp(a->attr.name, "gc_urgent"))

		return sysfs_emit(buf, "%s\n",

				gc_mode_names[sbi->gc_mode]);



	if (!strcmp(a->attr.name, "gc_segment_mode"))

		return sysfs_emit(buf, "%s\n",

				gc_mode_names[sbi->gc_segment_mode]);

		return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);



	if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {

		return sysfs_emit(buf, "%u\n",
@@ -844,6 +845,7 @@ F2FS_GENERAL_RO_ATTR(encoding); 
F2FS_GENERAL_RO_ATTR(mounted_time_sec);

F2FS_GENERAL_RO_ATTR(main_blkaddr);

F2FS_GENERAL_RO_ATTR(pending_discard);

F2FS_GENERAL_RO_ATTR(gc_mode);

#ifdef CONFIG_F2FS_STAT_FS

F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);

F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
@@ -926,6 +928,7 @@ static struct attribute *f2fs_attrs[] = { 
	ATTR_LIST(discard_granularity),

	ATTR_LIST(max_ordered_discard),

	ATTR_LIST(pending_discard),

	ATTR_LIST(gc_mode),

	ATTR_LIST(ipu_policy),

	ATTR_LIST(min_ipu_util),

	ATTR_LIST(min_fsync_blocks),