xref: /minix3/minix/lib/libvtreefs/mount.c (revision 289b04677a1b234d09a045a727f5e614a6c8d716)

/* VTreeFS - mount.c - mounting and unmounting */

#include "inc.h"
#include <minix/vfsif.h>

/*
 * Mount the file system.  Obtain the root inode and send back its details.
 */
int
fs_mount(dev_t __unused dev, unsigned int flags,
	struct fsdriver_node * root_node, unsigned int * res_flags)
{
	struct inode *root;

	/* VTreeFS must not be mounted as a root file system. */
	if (flags & REQ_ISROOT)
		return EINVAL;

	/* Get the root inode and increase its reference count. */
	root = get_root_inode();
	ref_inode(root);

	/* The system is now mounted.  Call the initialization hook. */
	if (vtreefs_hooks->init_hook != NULL)
		vtreefs_hooks->init_hook();

	/* Return the root inode's properties. */
	root_node->fn_ino_nr = get_inode_number(root);
	root_node->fn_mode = root->i_stat.mode;
	root_node->fn_size = root->i_stat.size;
	root_node->fn_uid = root->i_stat.uid;
	root_node->fn_gid = root->i_stat.gid;
	root_node->fn_dev = NO_DEV;

	*res_flags = RES_NOFLAGS;

	return OK;
}

/*
 * Unmount the file system.
 */
void
fs_unmount(void)
{
	struct inode *root;

	/* Decrease the count of the root inode. */
	root = get_root_inode();

	put_inode(root);

	/* The system is unmounted.  Call the cleanup hook. */
	if (vtreefs_hooks->cleanup_hook != NULL)
		vtreefs_hooks->cleanup_hook();
}