f2fs: sysfs: export linear_lookup in features directory

cat /sys/fs/f2fs/features/linear_lookup
supported

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

diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index 1fa140da5a1ac359462a71a20b68366f8886521f..8ff7e769a2f90bc6e590c6a93ecf8d8c3073c281 100644 (file)
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -270,7 +270,7 @@ Description:        Shows all enabled kernel features.
                inode_checksum, flexible_inline_xattr, quota_ino,
                inode_crtime, lost_found, verity, sb_checksum,
                casefold, readonly, compression, test_dummy_encryption_v2,
-               atomic_write, pin_file, encrypted_casefold.
+               atomic_write, pin_file, encrypted_casefold, linear_lookup.
 
 What:          /sys/fs/f2fs/<disk>/inject_rate
 Date:          May 2016

diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index cf98c5cbb98a8b07aacff7f6cfa3ca1edbcb2c9b..75134d69a0bdcd8d0d214c0dced74451aff45c8c 100644 (file)
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -1207,6 +1207,9 @@ F2FS_FEATURE_RO_ATTR(readonly);
 F2FS_FEATURE_RO_ATTR(compression);
 #endif
 F2FS_FEATURE_RO_ATTR(pin_file);
+#ifdef CONFIG_UNICODE
+F2FS_FEATURE_RO_ATTR(linear_lookup);
+#endif
 
 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 static struct attribute *f2fs_attrs[] = {
@@ -1356,6 +1359,9 @@ static struct attribute *f2fs_feat_attrs[] = {
        BASE_ATTR_LIST(compression),
 #endif
        BASE_ATTR_LIST(pin_file),
+#ifdef CONFIG_UNICODE
+       BASE_ATTR_LIST(linear_lookup),
+#endif
        NULL,
 };
 ATTRIBUTE_GROUPS(f2fs_feat);