Change log from v1:
o add description for the new mount option in Documentation/filesystems/f2fs.txt
>From 079dbb14c7d91d90863c9be4d9337b8ec086db7e Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Date: Fri, 23 Jan 2015 18:33:46 -0800
Subject: [PATCH] f2fs: support norecovery mount option
This patch adds a mount option, norecovery, which is mostly same as
disable_roll_forward. The only difference is that norecovery should be activated
with read-only mount option.
This can be used when user wants to check whether f2fs is mountable or not
without any recovery process. (e.g., xfstests/200)
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
Documentation/filesystems/f2fs.txt | 2 ++
fs/f2fs/super.c | 8 ++++++++
2 files changed, 10 insertions(+)
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index e0950c4..6758aa3 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -106,6 +106,8 @@ background_gc=%s Turn on/off cleaning operations, namely garbage
Default value for this option is on. So garbage
collection is on by default.
disable_roll_forward Disable the roll-forward recovery routine
+norecovery Disable the roll-forward recovery routine, mounted read-
+ only (i.e., -o ro,disable_roll_forward)
discard Issue discard/TRIM commands when a segment is cleaned.
no_heap Disable heap-style segment allocation which finds free
segments for data from the beginning of main area, while
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 47d9b04..a60fa1a 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -42,6 +42,7 @@ static struct kset *f2fs_kset;
enum {
Opt_gc_background,
Opt_disable_roll_forward,
+ Opt_norecovery,
Opt_discard,
Opt_noheap,
Opt_user_xattr,
@@ -62,6 +63,7 @@ enum {
static match_table_t f2fs_tokens = {
{Opt_gc_background, "background_gc=%s"},
{Opt_disable_roll_forward, "disable_roll_forward"},
+ {Opt_norecovery, "norecovery"},
{Opt_discard, "discard"},
{Opt_noheap, "no_heap"},
{Opt_user_xattr, "user_xattr"},
@@ -287,6 +289,12 @@ static int parse_options(struct super_block *sb, char *options)
case Opt_disable_roll_forward:
set_opt(sbi, DISABLE_ROLL_FORWARD);
break;
+ case Opt_norecovery:
+ /* this option mounts f2fs with ro */
+ set_opt(sbi, DISABLE_ROLL_FORWARD);
+ if (!f2fs_readonly(sb))
+ return -EINVAL;
+ break;
case Opt_discard:
set_opt(sbi, DISCARD);
break;
--
2.1.1
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