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/* This file contains mount and unmount functionality.
*
* The entry points into this file are:
* do_mount perform the READSUPER file system call
* do_unmount perform the UNMOUNT file system call
*
* Created:
* April 2009 (D.C. van Moolenbroek)
*/
#include "inc.h"
/*===========================================================================*
* do_mount *
*===========================================================================*/
int do_mount(dev_t __unused dev, unsigned int flags,
struct fsdriver_node *root_node, unsigned int *res_flags)
{
/* Mount the file system.
*/
char path[PATH_MAX];
struct inode *ino;
struct sffs_attr attr;
int r;
dprintf(("%s: mount (dev %"PRIx64", flags %x)\n", sffs_name, dev, flags));
if (flags & REQ_ISROOT) {
printf("%s: attempt to mount as root device\n", sffs_name);
return EINVAL;
}
read_only = !!(flags & REQ_RDONLY);
init_dentry();
ino = init_inode();
attr.a_mask = SFFS_ATTR_MODE | SFFS_ATTR_SIZE;
/* We cannot continue if we fail to get the properties of the root inode at
* all, because we cannot guess the details of the root node to return to
* VFS. Print a (hopefully) helpful error message, and abort the mount.
*/
if ((r = verify_inode(ino, path, &attr)) != OK) {
if (r == EAGAIN)
printf("%s: shared folders disabled\n", sffs_name);
else if (sffs_params->p_prefix[0] && (r == ENOENT || r == EACCES))
printf("%s: unable to access the given prefix directory\n",
sffs_name);
else
printf("%s: unable to access shared folders\n", sffs_name);
return r;
}
root_node->fn_ino_nr = INODE_NR(ino);
root_node->fn_mode = get_mode(ino, attr.a_mode);
root_node->fn_size = attr.a_size;
root_node->fn_uid = sffs_params->p_uid;
root_node->fn_gid = sffs_params->p_gid;
root_node->fn_dev = NO_DEV;
*res_flags = RES_64BIT;
return OK;
}
/*===========================================================================*
* do_unmount *
*===========================================================================*/
void do_unmount(void)
{
/* Unmount the file system.
*/
struct inode *ino;
dprintf(("%s: unmount\n", sffs_name));
/* Decrease the reference count of the root inode. */
if ((ino = find_inode(ROOT_INODE_NR)) == NULL)
return;
put_inode(ino);
/* There should not be any referenced inodes anymore now. */
if (have_used_inode())
printf("%s: in-use inodes left at unmount time!\n", sffs_name);
}
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