f2fs: add support for FS_IOC_GETFSSYSFSPATH

FS_IOC_GETFSSYSFSPATH ioctl expects sysfs sub-path of a filesystem, the
format can be "$FSTYP/$SYSFS_IDENTIFIER" under /sys/fs, it can helps to
standardizes exporting sysfs datas across filesystems.

This patch wires up FS_IOC_GETFSSYSFSPATH for f2fs, it will output
"f2fs/<dev>".

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 1f1b3647a998c00054eace82ec46d6bf18d89a1c..4a1bc8f40f9ab195cee52123b53548b64b2245d5 100644 (file)
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -4481,6 +4481,7 @@ try_onemore:
        sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
                (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
        super_set_uuid(sb, (void *) raw_super->uuid, sizeof(raw_super->uuid));
+       super_set_sysfs_name_bdev(sb);
        sb->s_iflags |= SB_I_CGROUPWB;
 
        /* init f2fs-specific super block info */