Chang log from v1:
o fix memory leak pointed by Chao
>From 82760814db6a01539ad15026b0469686110d92bc Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Date: Fri, 23 Jan 2015 17:41:39 -0800
Subject: [PATCH] f2fs: fix not to drop mount options when retrying fill_super
If wrong mount option was requested, f2fs tries to fill_super again.
But, during the next trial, f2fs has no valid mount options, since
parse_options deleted all the separators in the original string.
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
fs/f2fs/super.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 25f4291..47d9b04 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -951,6 +951,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root;
long err = -EINVAL;
bool retry = true;
+ char *options = NULL;
int i;
try_onemore:
@@ -982,9 +983,15 @@ try_onemore:
set_opt(sbi, POSIX_ACL);
#endif
/* parse mount options */
- err = parse_options(sb, (char *)data);
- if (err)
+ options = kstrdup((const char *)data, GFP_KERNEL);
+ if (data && !options) {
+ err = -ENOMEM;
goto free_sb_buf;
+ }
+
+ err = parse_options(sb, options);
+ if (err)
+ goto free_options;
sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
sb->s_max_links = F2FS_LINK_MAX;
@@ -1028,7 +1035,7 @@ try_onemore:
if (IS_ERR(sbi->meta_inode)) {
f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
err = PTR_ERR(sbi->meta_inode);
- goto free_sb_buf;
+ goto free_options;
}
err = get_valid_checkpoint(sbi);
@@ -1153,6 +1160,7 @@ try_onemore:
if (err)
goto free_kobj;
}
+ kfree(options);
return 0;
free_kobj:
@@ -1177,6 +1185,8 @@ free_cp:
free_meta_inode:
make_bad_inode(sbi->meta_inode);
iput(sbi->meta_inode);
+free_options:
+ kfree(options);
free_sb_buf:
brelse(raw_super_buf);
free_sbi:
--
2.1.1
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