static void
umount_usb_path(disk_info_t *disks_info, int port, const char *dev_name, int do_spindown)
{
disk_info_t *follow_disk;
partition_info_t *follow_partition;
if (!disks_info)
return;
for (follow_disk = disks_info; follow_disk != NULL; follow_disk = follow_disk->next) {
if (port != 0) {
if (follow_disk->port_root != port)
continue;
}
if (dev_name && follow_disk->device) {
if (strcmp(follow_disk->device, dev_name) != 0)
continue;
}
for (follow_partition = follow_disk->partitions; follow_partition != NULL; follow_partition = follow_partition->next)
umount_dev(follow_partition->device);
umount_dev_all(follow_disk->device);
if (do_spindown)
spindown_hdd(follow_disk->device);
}
}
asmlinkage int sys_umount(char * name, int flags)
{
struct dentry * dentry;
int retval;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
lock_kernel();
dentry = namei(name);
retval = PTR_ERR(dentry);
if (!IS_ERR(dentry)) {
struct inode * inode = dentry->d_inode;
kdev_t dev = inode->i_rdev;
retval = 0;
if (S_ISBLK(inode->i_mode)) {
if (IS_NODEV(inode))
retval = -EACCES;
} else {
struct super_block *sb = inode->i_sb;
retval = -EINVAL;
if (sb && inode == sb->s_root->d_inode) {
dev = sb->s_dev;
retval = 0;
}
}
dput(dentry);
if (!retval)
retval = umount_dev(dev, flags);
}
unlock_kernel();
return retval;
}
