[f2fs-dev,2/5,v2] f2fs: support norecovery mount option

Commit Message

Jaegeuk Kim Jan. 29, 2015, 6:31 p.m. UTC

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 <[e-mail]>
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 <[e-mail]>
---
 Documentation/filesystems/f2fs.txt | 2 ++
 fs/f2fs/super.c                    | 8 ++++++++
 2 files changed, 10 insertions(+)

Comments

?? Jan. 30, 2015, 5:11 a.m. UTC | #1

> -----Original Message-----
> From: Jaegeuk Kim [mailto:[e-mail]]
> Sent: Friday, January 30, 2015 2:31 AM
> To: Chao Yu
> Cc: [e-mail]; [e-mail];
> [e-mail]
> Subject: Re: [f2fs-dev] [PATCH 2/5 v2] f2fs: support norecovery mount option
> 
> 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 <[e-mail]>
> 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 <[e-mail]>

Reviewed-by: Chao Yu <[e-mail]>

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Patch

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;