linux-kernel - [RFC PATCH 20/68] vfs: Kill off mount_pseudo() and mount_pseudo

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Message-ID: <155373018685.7602.13175035775252327410.stgit@warthog.procyon.org.uk>
Date:   Wed, 27 Mar 2019 23:43:06 +0000
From:   David Howells <dhowells@...hat.com>
To:     viro@...iv.linux.org.uk
Cc:     linux-fsdevel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, dhowells@...hat.com
Subject: [RFC PATCH 20/68] vfs: Kill off mount_pseudo() and
 mount_pseudo_xattr()

Kill off mount_pseudo() and mount_pseudo_xattr() as they're replaced with
vfs_init_pseudo_fs_context().

Signed-off-by: David Howells <dhowells@...hat.com>
cc: linux-fsdevel@...r.kernel.org
---

 fs/libfs.c         |   53 ----------------------------------------------------
 include/linux/fs.h |   13 -------------
 2 files changed, 66 deletions(-)

diff --git a/fs/libfs.c b/fs/libfs.c
index ceaf69c885c2..9a15590b65da 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -326,59 +326,6 @@ int vfs_init_pseudo_fs_context(struct fs_context *fc,
 }
 EXPORT_SYMBOL(vfs_init_pseudo_fs_context);
 
-/*
- * Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that
- * will never be mountable)
- */
-struct dentry *mount_pseudo_xattr(struct file_system_type *fs_type, char *name,
-	const struct super_operations *ops, const struct xattr_handler **xattr,
-	const struct dentry_operations *dops, unsigned long magic)
-{
-	struct super_block *s;
-	struct dentry *dentry;
-	struct inode *root;
-	struct qstr d_name = QSTR_INIT(name, strlen(name));
-
-	s = sget_userns(fs_type, NULL, set_anon_super, SB_KERNMOUNT|SB_NOUSER,
-			&init_user_ns, NULL);
-	if (IS_ERR(s))
-		return ERR_CAST(s);
-
-	s->s_maxbytes = MAX_LFS_FILESIZE;
-	s->s_blocksize = PAGE_SIZE;
-	s->s_blocksize_bits = PAGE_SHIFT;
-	s->s_magic = magic;
-	s->s_op = ops ? ops : &simple_super_operations;
-	s->s_xattr = xattr;
-	s->s_time_gran = 1;
-	root = new_inode(s);
-	if (!root)
-		goto Enomem;
-	/*
-	 * since this is the first inode, make it number 1. New inodes created
-	 * after this must take care not to collide with it (by passing
-	 * max_reserved of 1 to iunique).
-	 */
-	root->i_ino = 1;
-	root->i_mode = S_IFDIR | S_IRUSR | S_IWUSR;
-	root->i_atime = root->i_mtime = root->i_ctime = current_time(root);
-	dentry = __d_alloc(s, &d_name);
-	if (!dentry) {
-		iput(root);
-		goto Enomem;
-	}
-	d_instantiate(dentry, root);
-	s->s_root = dentry;
-	s->s_d_op = dops;
-	s->s_flags |= SB_ACTIVE;
-	return dget(s->s_root);
-
-Enomem:
-	deactivate_locked_super(s);
-	return ERR_PTR(-ENOMEM);
-}
-EXPORT_SYMBOL(mount_pseudo_xattr);
-
 int simple_open(struct inode *inode, struct file *file)
 {
 	if (inode->i_private)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8b42df09b04c..b738e8e5b096 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2245,19 +2245,6 @@ struct super_block *sget(struct file_system_type *type,
 			int (*test)(struct super_block *,void *),
 			int (*set)(struct super_block *,void *),
 			int flags, void *data);
-extern struct dentry *mount_pseudo_xattr(struct file_system_type *, char *,
-					 const struct super_operations *ops,
-					 const struct xattr_handler **xattr,
-					 const struct dentry_operations *dops,
-					 unsigned long);
-
-static inline struct dentry *
-mount_pseudo(struct file_system_type *fs_type, char *name,
-	     const struct super_operations *ops,
-	     const struct dentry_operations *dops, unsigned long magic)
-{
-	return mount_pseudo_xattr(fs_type, name, ops, NULL, dops, magic);
-}
 
 /* Alas, no aliases. Too much hassle with bringing module.h everywhere */
 #define fops_get(fops) \