On Wed, Dec 15, 2010 at 02:09:01PM +0900, Takuma Umeya wrote:
> when callback is generated in NFSv4 server, it doesn't set the source
> address. When an alias IP is utilized on NFSv4 server and suppose the
> client is accessing via that alias IP (e.g. eth0:0), the client invokes
> the callback to the IP address that is set on the original device (e.g.
> eth0). This behavior results in timeout of xprt.
> The patch sets the IP address that the client should invoke callback to.
>
> Signed-off-by: Takuma Umeya <tumeya@xxxxxxxxxx>
>
>
> diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
> index 143da2e..bb5de7f 100644
> --- a/fs/nfsd/nfs4callback.c
> +++ b/fs/nfsd/nfs4callback.c
> @@ -483,6 +483,7 @@ int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *conn)
> .net = &init_net,
> .address = (struct sockaddr *) &conn->cb_addr,
> .addrsize = conn->cb_addrlen,
> + .saddress = (struct sockaddr *) &conn->cb_saddr,
> .timeout = &timeparms,
> .program = &cb_program,
> .version = 0,
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index 116cab9..c7d3171 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -1177,9 +1177,11 @@ find_unconfirmed_client_by_str(const char *dname, unsigned int hashval,
> }
>
> static void
> -gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid)
> +gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se,
> + u32 scopeid, struct svc_rqst *rqstp)
> {
> struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
> + struct sockaddr s_sa;
> unsigned short expected_family;
>
> /* Currently, we only support tcp and tcp6 for the callback channel */
> @@ -1205,6 +1207,19 @@ gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid)
>
> conn->cb_prog = se->se_callback_prog;
> conn->cb_ident = se->se_callback_ident;
> + switch(expected_family){
> + case AF_INET:
> + ((struct sockaddr_in *)&s_sa)->sin_family = AF_INET;
> + ((struct sockaddr_in *)&s_sa)->sin_addr = rqstp->
> + rq_daddr.addr;
> + break;
> + case AF_INET6:
> + ((struct sockaddr_in6 *)&s_sa)->sin6_family = AF_INET6;
> + ((struct sockaddr_in6 *)&s_sa)->sin6_addr = rqstp->
> + rq_daddr.addr6;
> + break;
> + }
> + rpc_copy_addr((struct sockaddr *)&conn->cb_saddr, &s_sa);
Chuck, is there any reason we use this special svc_addr_u union and not
a struct sockaddr_storage? This seems more verbose than necessary....
--b.
> return;
> out_err:
> conn->cb_addr.ss_family = AF_UNSPEC;
> @@ -1876,7 +1891,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
> * for consistent minorversion use throughout:
> */
> new->cl_minorversion = 0;
> - gen_callback(new, setclid, rpc_get_scope_id(sa));
> + gen_callback(new, setclid, rpc_get_scope_id(sa), rqstp);
> add_to_unconfirmed(new, strhashval);
> setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
> setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
> diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
> index 39adc27..0cee03d 100644
> --- a/fs/nfsd/state.h
> +++ b/fs/nfsd/state.h
> @@ -95,6 +95,7 @@ struct nfs4_delegation {
> struct nfs4_cb_conn {
> /* SETCLIENTID info */
> struct sockaddr_storage cb_addr;
> + struct sockaddr_storage cb_saddr;
> size_t cb_addrlen;
> u32 cb_prog; /* used only in 4.0 case;
> per-session otherwise */
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
