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ext4: return EROFS if device is r/o and journal replay is needed 

commit 4753d8a24d4588657bc0a4cd66d4e282dff15c8c upstream.

If the file system requires journal recovery, and the device is
read-ony, return EROFS to the mount system call.  This allows xfstests
generic/050 to pass.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Theodore Ts'o 2017-02-05 01:26:48 -05:00 committed by syphyr
parent 7e51c812e6
commit bb9577e7fe
1 changed files with 2 additions and 1 deletions
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3
fs/ext4/super.c
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@ -3979,7 +3979,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
*/
if (!test_opt(sb, NOLOAD) &&
EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) {
if (ext4_load_journal(sb, es, journal_devnum))
err = ext4_load_journal(sb, es, journal_devnum);
if (err)
goto failed_mount3;
} else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) &&
EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) {