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-rw-r--r--fs/ext4/super.c51
1 files changed, 33 insertions, 18 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9fdad843b30e..dda967efcbc2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5079,6 +5079,7 @@ static int ext4_load_journal(struct super_block *sb,
dev_t journal_dev;
int err = 0;
int really_read_only;
+ int journal_dev_ro;
if (WARN_ON_ONCE(!ext4_has_feature_journal(sb)))
return -EFSCORRUPTED;
@@ -5091,7 +5092,31 @@ static int ext4_load_journal(struct super_block *sb,
} else
journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
- really_read_only = bdev_read_only(sb->s_bdev);
+ if (journal_inum && journal_dev) {
+ ext4_msg(sb, KERN_ERR,
+ "filesystem has both journal inode and journal device!");
+ return -EINVAL;
+ }
+
+ if (journal_inum) {
+ journal = ext4_get_journal(sb, journal_inum);
+ if (!journal)
+ return -EINVAL;
+ } else {
+ journal = ext4_get_dev_journal(sb, journal_dev);
+ if (!journal)
+ return -EINVAL;
+ }
+
+ journal_dev_ro = bdev_read_only(journal->j_dev);
+ really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro;
+
+ if (journal_dev_ro && !sb_rdonly(sb)) {
+ ext4_msg(sb, KERN_ERR,
+ "journal device read-only, try mounting with '-o ro'");
+ err = -EROFS;
+ goto err_out;
+ }
/*
* Are we loading a blank journal or performing recovery after a
@@ -5106,27 +5131,14 @@ static int ext4_load_journal(struct super_block *sb,
ext4_msg(sb, KERN_ERR, "write access "
"unavailable, cannot proceed "
"(try mounting with noload)");
- return -EROFS;
+ err = -EROFS;
+ goto err_out;
}
ext4_msg(sb, KERN_INFO, "write access will "
"be enabled during recovery");
}
}
- if (journal_inum && journal_dev) {
- ext4_msg(sb, KERN_ERR, "filesystem has both journal "
- "and inode journals!");
- return -EINVAL;
- }
-
- if (journal_inum) {
- if (!(journal = ext4_get_journal(sb, journal_inum)))
- return -EINVAL;
- } else {
- if (!(journal = ext4_get_dev_journal(sb, journal_dev)))
- return -EINVAL;
- }
-
if (!(journal->j_flags & JBD2_BARRIER))
ext4_msg(sb, KERN_INFO, "barriers disabled");
@@ -5146,8 +5158,7 @@ static int ext4_load_journal(struct super_block *sb,
if (err) {
ext4_msg(sb, KERN_ERR, "error loading journal");
- jbd2_journal_destroy(journal);
- return err;
+ goto err_out;
}
EXT4_SB(sb)->s_journal = journal;
@@ -5167,6 +5178,10 @@ static int ext4_load_journal(struct super_block *sb,
}
return 0;
+
+err_out:
+ jbd2_journal_destroy(journal);
+ return err;
}
static int ext4_commit_super(struct super_block *sb, int sync)