embox

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/*
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 * @file
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 *
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 * @date Nov 29, 2012
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 * @author: Anton Bondarev
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 */
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#include <errno.h>
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#include <fs/inode.h>
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#include <fs/perm.h>
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#include <fs/vfs.h>
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#include <fs/path.h>
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#include <security/security.h>
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#include <fs/kfsop.h>
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static int umount_walker(struct inode *node) {
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	struct inode *child;
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	if (S_ISDIR(node->i_mode)) {
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		while (NULL != (child = vfs_subtree_get_child_next(node, NULL))) {
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			umount_walker(child);
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		}
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	}
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	vfs_del_leaf(node);
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	return 0;
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}
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int kumount(const char *dir) {
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	struct path dir_node, node;
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	const struct fs_driver *drv;
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	const char *lastpath;
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	int res;
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	/* find directory */
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	res = fs_perm_lookup(dir, &lastpath, &dir_node);
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	if (0 != res) {
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		errno = -res;
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		return -1;
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	}
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	if_mounted_follow_down(&dir_node);
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	node = dir_node;
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	drv = dir_node.node->i_sb->fs_drv;
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	if (!drv) {
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		return -EINVAL;
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	}
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	res = security_umount(dir_node.node);
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	if (0 != res) {
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		return res;
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	}
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	res = umount_walker(dir_node.node);
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	if (0 != res) {
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		return res;
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	}
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	super_block_free(dir_node.node->i_sb);
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	if (dir_node.node != vfs_get_root()) {
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		inode_free(dir_node.node);
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	}
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	mount_table_del(node.mnt_desc);
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	return 0;
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}
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