The concept seems OK to me here. I have only a few minor comments.
On Thu, May 24, 2012 at 06:08:57PM +0900, Simon Horman wrote:
> +#define TNL_F_CSUM (1 << 0) /* Checksum packets. */
> +#define TNL_F_TOS_INHERIT (1 << 1) /* Inherit ToS from inner packet. */
> +#define TNL_F_TTL_INHERIT (1 << 2) /* Inherit TTL from inner packet. */
> +#define TNL_F_DF_INHERIT (1 << 3) /* Inherit DF bit from inner packet. */
> +#define TNL_F_DF_DEFAULT (1 << 4) /* Set DF bit if inherit off or
> + * not IP. */
> +#define TNL_F_PMTUD (1 << 5) /* Enable path MTU discovery. */
> +#define TNL_F_HDR_CACHE (1 << 6) /* Enable tunnel header
> caching. */
> +#define TNL_F_IPSEC (1 << 7) /* Traffic is IPsec encrypted. */
> +#define TNL_F_IN_KEY (1 << 8) /* Tunnel port has input key. */
> +#define TNL_F_OUT_KEY (1 << 9) /* Tunnel port has output key. */
Some of the above definitions use all spaces, others use tabs. It's
OVS userspace code so it's better to use all spaces, I think.
> + if (is_ipsec) {
> + char *file_name = xasprintf("%s/%s", ovs_rundir(),
> + "ovs-monitor-ipsec.pid");
> + pid_t pid = read_pidfile(file_name);
> + free(file_name);
> + if (pid < 0) {
> + VLOG_ERR("%s: IPsec requires the ovs-monitor-ipsec daemon",
> + iface_cfg->name);
> + goto err;
> + }
I just noticed that we re-read this pidfile every time we parse an
IPsec tunnel. I guess that would be a big waste of time if we have a
lot of IPsec tunnels. I'll make a note to consider fixing this
separately (it's not your problem).
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