25 static int kernfs_sop_remount_fs(struct super_block *sb, int *flags, char *data)  in kernfs_sop_remount_fs()  argument
27 	struct kernfs_root *root = kernfs_info(sb)->root;  in kernfs_sop_remount_fs()
87 static struct inode *kernfs_fh_get_inode(struct super_block *sb,  in kernfs_fh_get_inode()  argument
90 	struct kernfs_super_info *info = kernfs_info(sb);  in kernfs_fh_get_inode()
100 	inode = kernfs_get_inode(sb, kn);  in kernfs_fh_get_inode()
113 static struct dentry *kernfs_fh_to_dentry(struct super_block *sb, struct fid *fid,  in kernfs_fh_to_dentry()  argument
116 	return generic_fh_to_dentry(sb, fid, fh_len, fh_type,  in kernfs_fh_to_dentry()
120 static struct dentry *kernfs_fh_to_parent(struct super_block *sb, struct fid *fid,  in kernfs_fh_to_parent()  argument
123 	return generic_fh_to_parent(sb, fid, fh_len, fh_type,  in kernfs_fh_to_parent()
147 struct kernfs_root *kernfs_root_from_sb(struct super_block *sb)  in kernfs_root_from_sb()  argument
149 	if (sb->s_op == &kernfs_sops)  in kernfs_root_from_sb()
150 		return kernfs_info(sb)->root;  in kernfs_root_from_sb()
185 				  struct super_block *sb)  in kernfs_node_dentry()  argument
190 	BUG_ON(sb->s_op != &kernfs_sops);  in kernfs_node_dentry()
192 	dentry = dget(sb->s_root);  in kernfs_node_dentry()
225 static int kernfs_fill_super(struct super_block *sb, unsigned long magic)  in kernfs_fill_super()  argument
227 	struct kernfs_super_info *info = kernfs_info(sb);  in kernfs_fill_super()
231 	info->sb = sb;  in kernfs_fill_super()
233 	sb->s_iflags |= SB_I_NOEXEC | SB_I_NODEV;  in kernfs_fill_super()
234 	sb->s_blocksize = PAGE_SIZE;  in kernfs_fill_super()
235 	sb->s_blocksize_bits = PAGE_SHIFT;  in kernfs_fill_super()
236 	sb->s_magic = magic;  in kernfs_fill_super()
237 	sb->s_op = &kernfs_sops;  in kernfs_fill_super()
238 	sb->s_xattr = kernfs_xattr_handlers;  in kernfs_fill_super()
240 		sb->s_export_op = &kernfs_export_ops;  in kernfs_fill_super()
241 	sb->s_time_gran = 1;  in kernfs_fill_super()
245 	inode = kernfs_get_inode(sb, info->root->kn);  in kernfs_fill_super()
258 	sb->s_root = root;  in kernfs_fill_super()
259 	sb->s_d_op = &kernfs_dops;  in kernfs_fill_super()
263 static int kernfs_test_super(struct super_block *sb, void *data)  in kernfs_test_super()  argument
265 	struct kernfs_super_info *sb_info = kernfs_info(sb);  in kernfs_test_super()
271 static int kernfs_set_super(struct super_block *sb, void *data)  in kernfs_set_super()  argument
274 	error = set_anon_super(sb, data);  in kernfs_set_super()
276 		sb->s_fs_info = data;  in kernfs_set_super()
286 const void *kernfs_super_ns(struct super_block *sb)  in kernfs_super_ns()  argument
288 	struct kernfs_super_info *info = kernfs_info(sb);  in kernfs_super_ns()
313 	struct super_block *sb;  in kernfs_mount_ns()  local
325 	sb = sget_userns(fs_type, kernfs_test_super, kernfs_set_super, flags,  in kernfs_mount_ns()
327 	if (IS_ERR(sb) || sb->s_fs_info != info)  in kernfs_mount_ns()
329 	if (IS_ERR(sb))  in kernfs_mount_ns()
330 		return ERR_CAST(sb);  in kernfs_mount_ns()
333 		*new_sb_created = !sb->s_root;  in kernfs_mount_ns()
335 	if (!sb->s_root) {  in kernfs_mount_ns()
336 		struct kernfs_super_info *info = kernfs_info(sb);  in kernfs_mount_ns()
338 		error = kernfs_fill_super(sb, magic);  in kernfs_mount_ns()
340 			deactivate_locked_super(sb);  in kernfs_mount_ns()
343 		sb->s_flags |= SB_ACTIVE;  in kernfs_mount_ns()
350 	return dget(sb->s_root);  in kernfs_mount_ns()
361 void kernfs_kill_sb(struct super_block *sb)  in kernfs_kill_sb()  argument
363 	struct kernfs_super_info *info = kernfs_info(sb);  in kernfs_kill_sb()
373 	kill_anon_super(sb);  in kernfs_kill_sb()
392 	struct super_block *sb = NULL;  in kernfs_pin_sb()  local
397 			sb = info->sb;  in kernfs_pin_sb()
398 			if (!atomic_inc_not_zero(&info->sb->s_active))  in kernfs_pin_sb()
399 				sb = ERR_PTR(-EINVAL);  in kernfs_pin_sb()
404 	return sb;  in kernfs_pin_sb()