static long do_locks(unsigned int fd, unsigned int cmd,
unsigned long arg)
{
struct flock64 kernel;
struct oabi_flock64 user;
mm_segment_t fs;
long ret;
if (copy_from_user(&user, (struct oabi_flock64 __user *)arg,
sizeof(user)))
return -EFAULT;
kernel.l_type = user.l_type;
kernel.l_whence = user.l_whence;
kernel.l_start = user.l_start;
kernel.l_len = user.l_len;
kernel.l_pid = user.l_pid;
fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_fcntl64(fd, cmd, (unsigned long)&kernel);
set_fs(fs);
if (!ret && (cmd == F_GETLK64 || cmd == F_OFD_GETLK)) {
user.l_type = kernel.l_type;
user.l_whence = kernel.l_whence;
user.l_start = kernel.l_start;
user.l_len = kernel.l_len;
user.l_pid = kernel.l_pid;
if (copy_to_user((struct oabi_flock64 __user *)arg,
&user, sizeof(user)))
ret = -EFAULT;
}
return ret;
}
asmlinkage long sys_oabi_fcntl64(unsigned int fd, unsigned int cmd,
unsigned long arg)
{
struct oabi_flock64 user;
struct flock64 kernel;
mm_segment_t fs = USER_DS; /* initialized to kill a warning */
unsigned long local_arg = arg;
int ret;
switch (cmd) {
case F_GETLKP:
case F_SETLKP:
case F_SETLKPW:
case F_GETLK64:
case F_SETLK64:
case F_SETLKW64:
if (copy_from_user(&user, (struct oabi_flock64 __user *)arg,
sizeof(user)))
return -EFAULT;
kernel.l_type = user.l_type;
kernel.l_whence = user.l_whence;
kernel.l_start = user.l_start;
kernel.l_len = user.l_len;
kernel.l_pid = user.l_pid;
local_arg = (unsigned long)&kernel;
fs = get_fs();
set_fs(KERNEL_DS);
}
ret = sys_fcntl64(fd, cmd, local_arg);
switch (cmd) {
case F_GETLK64:
if (!ret) {
user.l_type = kernel.l_type;
user.l_whence = kernel.l_whence;
user.l_start = kernel.l_start;
user.l_len = kernel.l_len;
user.l_pid = kernel.l_pid;
if (copy_to_user((struct oabi_flock64 __user *)arg,
&user, sizeof(user)))
ret = -EFAULT;
}
case F_SETLK64:
case F_SETLKW64:
set_fs(fs);
}
return ret;
}
asmlinkage long sys_oabi_fcntl64(unsigned int fd, unsigned int cmd,
unsigned long arg)
{
switch (cmd) {
case F_OFD_GETLK:
case F_OFD_SETLK:
case F_OFD_SETLKW:
case F_GETLK64:
case F_SETLK64:
case F_SETLKW64:
return do_locks(fd, cmd, arg);
default:
return sys_fcntl64(fd, cmd, arg);
}
}
/** Handler for doing an FCNTL64 in a FAF open file.
* @author Renaud Lottiaux
*
* @param from Node sending the request
* @param msgIn Request message
*/
void handle_faf_fcntl64 (struct rpc_desc* desc,
void *msgIn, size_t size)
{
struct faf_ctl_msg *msg = msgIn;
const struct cred *old_cred;
unsigned long arg;
long r;
int err;
if (msg->cmd == F_GETLK64 || msg->cmd == F_SETLK64 || msg->cmd == F_SETLKW64)
arg = (unsigned long) &msg->flock64;
else
arg = msg->arg;
old_cred = unpack_override_creds(desc);
if (IS_ERR(old_cred))
goto cancel;
err = remote_sleep_prepare(desc);
if (err) {
revert_creds(old_cred);
goto cancel;
}
r = sys_fcntl64 (msg->server_fd, msg->cmd, arg);
remote_sleep_finish();
revert_creds(old_cred);
err = rpc_pack_type(desc, r);
if (unlikely(err))
goto cancel;
if (!r && msg->cmd == F_GETLK64) {
err = rpc_pack_type(desc, msg->flock64);
if (unlikely(err))
goto cancel;
}
return;
cancel:
rpc_cancel(desc);
}
