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nfs4: set source address when callback is generated 

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@redhat.com>
[bfields@redhat.com: Simplify gen_callback arguments, use helper function]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Takuma Umeya 2010-12-15 14:09:01 +09:00 committed by J. Bruce Fields
parent 3c72602340
commit 6f3d772fb8
3 changed files with 21 additions and 3 deletions
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1
fs/nfsd/nfs4callback.c
View File

@ -484,6 +484,7 @@ static int setup_callback_client(struct nfs4_client *clp,
.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,

22
fs/nfsd/nfs4state.c
View File

@ -1163,10 +1163,26 @@ find_unconfirmed_client_by_str(const char *dname, unsigned int hashval)
return NULL;
}
static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr)
{
switch (family) {
case AF_INET:
((struct sockaddr_in *)sa)->sin_family = AF_INET;
((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr;
return;
case AF_INET6:
((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6;
((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6;
return;
}
}
static void
gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid)
gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
{
struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
struct sockaddr *sa = svc_addr(rqstp);
u32 scopeid = rpc_get_scope_id(sa);
unsigned short expected_family;
/* Currently, we only support tcp and tcp6 for the callback channel */
@ -1192,6 +1208,7 @@ 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;
rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr);
return;
out_err:
conn->cb_addr.ss_family = AF_UNSPEC;
@ -1768,7 +1785,6 @@ __be32
nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_setclientid *setclid)
{
struct sockaddr *sa = svc_addr(rqstp);
struct xdr_netobj clname = {
.len = setclid->se_namelen,
.data = setclid->se_name,
@ -1871,7 +1887,7 @@ 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, 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;

1
fs/nfsd/state.h
View File

@ -96,6 +96,7 @@ 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 */