fs: implement iget_locked and iget_failed

Implement in fs core rather than using a private version in UBIFS.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 24 insertions, 29 deletions

diff --git a/fs/fs.c b/fs/fs.c
index 5bfc6f8b78..12851b7ae3 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -1051,6 +1051,30 @@ struct inode *new_inode(struct super_block *sb)
 	return inode;
 }
 
+struct inode *iget_locked(struct super_block *sb, unsigned long ino)
+{
+	struct inode *inode;
+
+	list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
+		if (inode->i_ino == ino)
+			return iget(inode);
+	}
+
+	inode = new_inode(sb);
+	if (!inode)
+		return NULL;
+
+	inode->i_state = I_NEW;
+	inode->i_ino = ino;
+
+	return inode;
+}
+
+void iget_failed(struct inode *inode)
+{
+	iput(inode);
+}
+
 void iput(struct inode *inode)
 {
 	if (!inode->i_count)
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index bfc0a4714a..8bd1803bce 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -55,26 +55,6 @@ int set_anon_super(struct super_block *s, void *data)
 	return 0;
 }
 
-struct inode *iget_locked(struct super_block *sb, unsigned long ino)
-{
-	struct inode *inode;
-
-	inode = (struct inode *)kzalloc(
-			sizeof(struct ubifs_inode), 0);
-	if (inode) {
-		inode->i_ino = ino;
-		inode->i_sb = sb;
-		list_add(&inode->i_sb_list, &sb->s_inodes);
-		inode->i_state = I_SYNC | I_NEW;
-	}
-
-	return inode;
-}
-
-void iget_failed(struct inode *inode)
-{
-}
-
 int ubifs_iput(struct inode *inode)
 {
 	list_del_init(&inode->i_sb_list);
@@ -2574,15 +2554,6 @@ int ubifs_get_super(struct device_d *dev, struct ubi_volume_desc *ubi, int silen
 	}
 	sb->s_dev = c->vi.cdev;
 
-	if (c->rw_incompat) {
-		ubifs_err(c, "the file-system is not R/W-compatible");
-		ubifs_msg(c, "on-flash format version is w%d/r%d, but software only supports up to version w%d/r%d",
-			  c->fmt_version, c->ro_compat_version,
-			  UBIFS_FORMAT_VERSION, UBIFS_RO_COMPAT_VERSION);
-		err = -EROFS;
-		goto out;
-	}
-
 	return 0;
 out:
 	kfree(c);