[Devel] Re: [PATCH] Remove struct timeval from socket header

[Serge E. Hallyn]

Quoting Dan Smith (danms at us.ibm.com):
> This patch removes the 'struct timeval' from the socket header and replaces
> it with a fixed-size type as suggested by Oren.
> 
> Signed-off-by: Dan Smith <danms at us.ibm.com>

Acked-by: Serge Hallyn <serue at us.ibm.com>

> ---
>  include/linux/checkpoint_hdr.h |    5 +++--
>  net/checkpoint.c               |   22 ++++++++++++++++++++--
>  2 files changed, 23 insertions(+), 4 deletions(-)
> 
> diff --git a/include/linux/checkpoint_hdr.h b/include/linux/checkpoint_hdr.h
> index 5473a4f..01be039 100644
> --- a/include/linux/checkpoint_hdr.h
> +++ b/include/linux/checkpoint_hdr.h
> @@ -385,6 +385,9 @@ struct ckpt_hdr_socket {
>  		__s64 rcvlowat;
>  		__u64 flags;
> 
> +		__s64 rcvtimeo;
> +		__s64 sndtimeo;
> +
>  		__u32 err;
>  		__u32 err_soft;
>  		__u32 priority;
> @@ -400,8 +403,6 @@ struct ckpt_hdr_socket {
>  		__u8 no_check;
> 
>  		struct linger linger;
> -		struct timeval rcvtimeo;
> -		struct timeval sndtimeo;
>  	} sock __attribute__ ((aligned(8)));
>  } __attribute__ ((aligned(8)));
> 
> diff --git a/net/checkpoint.c b/net/checkpoint.c
> index a7e7db0..2c62d54 100644
> --- a/net/checkpoint.c
> +++ b/net/checkpoint.c
> @@ -349,6 +349,24 @@ static int sock_restore_flags(struct socket *sock,
>         return 0;
>  }
> 
> +static int sock_copy_timeval(int op, struct sock *sk,
> +			     int sockopt, __s64 *saved)
> +{
> +	struct timeval tv;
> +
> +	if (op == CKPT_CPT) {
> +		if (CKPT_COPY_SOPT(op, sk, sockopt, &tv))
> +			return -EINVAL;
> +		*saved = timeval_to_ns(&tv);
> +	} else {
> +		tv = ns_to_timeval(*saved);
> +		if (CKPT_COPY_SOPT(op, sk, sockopt, &tv))
> +			return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
>  static int sock_cptrst(struct ckpt_ctx *ctx, struct sock *sk,
>  		       struct ckpt_hdr_socket *h, int op)
>  {
> @@ -392,12 +410,12 @@ static int sock_cptrst(struct ckpt_ctx *ctx, struct sock *sk,
>  		return -EINVAL;
>  	}
> 
> -	if (CKPT_COPY_SOPT(op, sk, SO_SNDTIMEO, &h->sock.sndtimeo)) {
> +	if (sock_copy_timeval(op, sk, SO_SNDTIMEO, &h->sock.sndtimeo)) {
>  		ckpt_debug("Failed to set SO_SNDTIMEO");
>  		return -EINVAL;
>  	}
> 
> -	if (CKPT_COPY_SOPT(op, sk, SO_RCVTIMEO, &h->sock.rcvtimeo)) {
> +	if (sock_copy_timeval(op, sk, SO_RCVTIMEO, &h->sock.rcvtimeo)) {
>  		ckpt_debug("Failed to set SO_RCVTIMEO");
>  		return -EINVAL;
>  	}
> -- 
> 1.6.2.5
> 
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