linux-ext4 - [PATCH v3] ext2: add warning when specifying nocheck option

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Message-Id: <20180608025340.32711-1-cgxu519@gmx.com>
Date:   Fri,  8 Jun 2018 10:53:40 +0800
From:   Chengguang Xu <cgxu519@....com>
To:     jack@...e.com
Cc:     linux-ext4@...r.kernel.org, Chengguang Xu <cgxu519@....com>
Subject: [PATCH v3] ext2: add warning when specifying nocheck option

The option nocheck(nocheck/check=none) is useless but considering
backwards compatibility it's better to print warning for a while
before completely remove from the code.

This patch add proper warning message for option 'nocheck' and
remove unnecessary comment/function declaration which is used for
removed option 'check'.

Signed-off-by: Chengguang Xu <cgxu519@....com>
---
v1->v2:
- Keep option nocheck as is and only add warning message.

v2->v3:
- Add specific deprecation schedule to warning message.

 fs/ext2/ext2.h  | 2 --
 fs/ext2/super.c | 5 ++---
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index cc40802ddfa8..00e759f05161 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -748,7 +748,6 @@ extern void ext2_free_blocks (struct inode *, unsigned long,
 			      unsigned long);
 extern unsigned long ext2_count_free_blocks (struct super_block *);
 extern unsigned long ext2_count_dirs (struct super_block *);
-extern void ext2_check_blocks_bitmap (struct super_block *);
 extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
 						    unsigned int block_group,
 						    struct buffer_head ** bh);
@@ -771,7 +770,6 @@ extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page
 extern struct inode * ext2_new_inode (struct inode *, umode_t, const struct qstr *);
 extern void ext2_free_inode (struct inode *);
 extern unsigned long ext2_count_free_inodes (struct super_block *);
-extern void ext2_check_inodes_bitmap (struct super_block *);
 extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
 
 /* inode.c */
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index c09289a42dc5..543e92762952 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -557,6 +557,8 @@ static int parse_options(char *options, struct super_block *sb,
 			set_opt (opts->s_mount_opt, NO_UID32);
 			break;
 		case Opt_nocheck:
+			ext2_msg(sb, KERN_WARNING,
+				"Option nocheck/check=none is deprecated and will be removed in June 2020.");
 			clear_opt (opts->s_mount_opt, CHECK);
 			break;
 		case Opt_debug:
@@ -1333,9 +1335,6 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
 	new_opts.s_resgid = sbi->s_resgid;
 	spin_unlock(&sbi->s_lock);
 
-	/*
-	 * Allow the "check" option to be passed as a remount option.
-	 */
 	if (!parse_options(data, sb, &new_opts))
 		return -EINVAL;
 
-- 
2.17.1