long do_handle_open(int mountdirfd,
struct file_handle __user *ufh, int open_flag)
{
long retval = 0;
struct path path;
struct file *file;
int fd;
retval = handle_to_path(mountdirfd, ufh, &path);
if (retval)
return retval;
fd = get_unused_fd_flags(open_flag);
if (fd < 0) {
path_put(&path);
return fd;
}
file = file_open_root(path.dentry, path.mnt, "", open_flag);
if (IS_ERR(file)) {
put_unused_fd(fd);
retval = PTR_ERR(file);
} else {
retval = fd;
fsnotify_open(file);
fd_install(fd, file);
}
path_put(&path);
return retval;
}
int
map_write(FSInfo *fs, char *path)
{
FileHandle *root;
FileHandle *bad;
if (!map_open_write(path))
return 0;
if ((root = file_open_root(fs)) == 0)
return 0;
walk_dir(root);
file_close(root);
map_close();
return 1;
}
static ssize_t binary_sysctl(const int *name, int nlen,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
const struct bin_table *table = NULL;
struct vfsmount *mnt;
struct file *file;
ssize_t result;
char *pathname;
int flags;
pathname = sysctl_getname(name, nlen, &table);
result = PTR_ERR(pathname);
if (IS_ERR(pathname))
goto out;
if (oldval && oldlen && newval && newlen) {
flags = O_RDWR;
} else if (newval && newlen) {
flags = O_WRONLY;
} else if (oldval && oldlen) {
flags = O_RDONLY;
} else {
result = 0;
goto out_putname;
}
mnt = current->nsproxy->pid_ns->proc_mnt;
file = file_open_root(mnt->mnt_root, mnt, pathname, flags);
result = PTR_ERR(file);
if (IS_ERR(file))
goto out_putname;
result = table->convert(file, oldval, oldlen, newval, newlen);
fput(file);
out_putname:
__putname(pathname);
out:
return result;
}
