It's currently a __be32, which isn't big enough to hold an IPv6 address.
While we're at it, add some new routines for comparing and copying
cl_addr's, and a function for formatting a cl_addr into a string.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 89 +++++++++++++++++++++++++++++++++++++-------
include/linux/nfsd/state.h | 2 +-
2 files changed, 76 insertions(+), 15 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 6a12219..f1caddd 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1198,6 +1198,62 @@ nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
clid->flags = new->cl_exchange_flags;
}
+/* Returns true if addresses are equal (ignoring port, scope, etc) */
+static bool
+cl_addr_equal(struct sockaddr *a, struct sockaddr *b)
+{
+ struct sockaddr_in *a4, *b4;
+
+ if (a->sa_family != b->sa_family)
+ return false;
+
+ switch (a->sa_family) {
+ case AF_INET:
+ a4 = (struct sockaddr_in *) a;
+ b4 = (struct sockaddr_in *) b;
+ return (a4->sin_addr.s_addr == b4->sin_addr.s_addr);
+ }
+
+ /* not sure how to compare, so just return false */
+ return false;
+}
+
+/* Given a sockaddr, fill in the cl_addr -- ignore port, scope, etc */
+static void
+cl_addr_copy(struct sockaddr *dst, struct sockaddr *src)
+{
+ struct sockaddr_in *s4, *d4;
+
+ dst->sa_family = src->sa_family;
+
+ switch (dst->sa_family) {
+ case AF_INET:
+ s4 = (struct sockaddr_in *) src;
+ d4 = (struct sockaddr_in *) dst;
+ d4->sin_addr.s_addr = s4->sin_addr.s_addr;
+ return;
+ default:
+ dst->sa_family = AF_UNSPEC;
+ }
+}
+
+/* format the cl_addr as text and stuff it into buf. Don't go beyond size. */
+static void
+cl_addr_snprintf(char *buf, size_t size, struct sockaddr *sa)
+{
+ switch (sa->sa_family) {
+ case AF_INET:
+ snprintf(buf, size, "%pI4",
+ &((struct sockaddr_in *) sa)->sin_addr.s_addr);
+ break;
+ default:
+ snprintf(buf, size, "(family=%hu)", sa->sa_family);
+ }
+
+ /* forcibly NULL terminate string, just in case */
+ buf[size - 1] = '\0';
+}
+
__be32
nfsd4_exchange_id(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
@@ -1207,13 +1263,15 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
int status;
unsigned int strhashval;
char dname[HEXDIR_LEN];
+ char addr_str[INET_ADDRSTRLEN];
nfs4_verifier verf = exid->verifier;
- u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr;
+ struct sockaddr *sa = svc_addr(rqstp);
+ cl_addr_snprintf(addr_str, INET_ADDRSTRLEN, sa);
dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
- " ip_addr=%u flags %x, spa_how %d\n",
+ "ip_addr=%s flags %x, spa_how %d\n",
__func__, rqstp, exid, exid->clname.len, exid->clname.data,
- ip_addr, exid->flags, exid->spa_how);
+ addr_str, exid->flags, exid->spa_how);
if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A))
return nfserr_inval;
@@ -1261,7 +1319,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
expire_client(conf);
goto out_new;
}
- if (ip_addr != conf->cl_addr &&
+ if (!cl_addr_equal((struct sockaddr *) &conf->cl_addr, sa) &&
!(exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A)) {
/* Client collision. 18.35.4 case 3 */
status = nfserr_clid_inuse;
@@ -1308,7 +1366,7 @@ out_new:
copy_verf(new, &verf);
copy_cred(&new->cl_cred, &rqstp->rq_cred);
- new->cl_addr = ip_addr;
+ cl_addr_copy((struct sockaddr *) &new->cl_addr, sa);
gen_clid(new);
gen_confirm(new);
add_to_unconfirmed(new, strhashval);
@@ -1362,7 +1420,7 @@ nfsd4_create_session(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_create_session *cr_ses)
{
- u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr;
+ struct sockaddr *sa = svc_addr(rqstp);
struct nfsd4_compoundres *resp = rqstp->rq_resp;
struct nfs4_client *conf, *unconf;
struct nfsd4_slot *slot = NULL;
@@ -1393,7 +1451,7 @@ nfsd4_create_session(struct svc_rqst *rqstp,
conf->cl_slot.sl_seqid++;
} else if (unconf) {
if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
- (ip_addr != unconf->cl_addr)) {
+ !cl_addr_equal(sa, (struct sockaddr *) &unconf->cl_addr)) {
status = nfserr_clid_inuse;
goto out;
}
@@ -1541,7 +1599,7 @@ __be32
nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_setclientid *setclid)
{
- struct sockaddr_in *sin = svc_addr_in(rqstp);
+ struct sockaddr *sa = svc_addr(rqstp);
struct xdr_netobj clname = {
.len = setclid->se_namelen,
.data = setclid->se_name,
@@ -1573,8 +1631,11 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
/* RFC 3530 14.2.33 CASE 0: */
status = nfserr_clid_inuse;
if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
- dprintk("NFSD: setclientid: string in use by client"
- " at %pI4\n", &conf->cl_addr);
+ char addr_str[INET_ADDRSTRLEN];
+ cl_addr_snprintf(addr_str, INET_ADDRSTRLEN,
+ (struct sockaddr *) &conf->cl_addr);
+ dprintk("NFSD: setclientid: string in use by client "
+ "at %s\n", addr_str);
goto out;
}
}
@@ -1636,7 +1697,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
gen_clid(new);
}
copy_verf(new, &clverifier);
- new->cl_addr = sin->sin_addr.s_addr;
+ cl_addr_copy((struct sockaddr *) &new->cl_addr, sa);
new->cl_flavor = rqstp->rq_flavor;
princ = svc_gss_principal(rqstp);
if (princ) {
@@ -1670,7 +1731,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_setclientid_confirm *setclientid_confirm)
{
- struct sockaddr_in *sin = svc_addr_in(rqstp);
+ struct sockaddr *sa = svc_addr(rqstp);
struct nfs4_client *conf, *unconf;
nfs4_verifier confirm = setclientid_confirm->sc_confirm;
clientid_t * clid = &setclientid_confirm->sc_clientid;
@@ -1689,9 +1750,9 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
unconf = find_unconfirmed_client(clid);
status = nfserr_clid_inuse;
- if (conf && conf->cl_addr != sin->sin_addr.s_addr)
+ if (conf && !cl_addr_equal((struct sockaddr *) &conf->cl_addr, sa))
goto out;
- if (unconf && unconf->cl_addr != sin->sin_addr.s_addr)
+ if (unconf && !cl_addr_equal((struct sockaddr *) &unconf->cl_addr, sa))
goto out;
/*
diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h
index 95a925c..d9728b9 100644
--- a/include/linux/nfsd/state.h
+++ b/include/linux/nfsd/state.h
@@ -179,7 +179,7 @@ struct nfs4_client {
char cl_recdir[HEXDIR_LEN]; /* recovery dir */
nfs4_verifier cl_verifier; /* generated by client */
time_t cl_time; /* time of last lease renewal */
- __be32 cl_addr; /* client ipaddress */
+ struct sockaddr_storage cl_addr; /* client ipaddress */
u32 cl_flavor; /* setclientid pseudoflavor */
char *cl_principal; /* setclientid principal name */
struct svc_cred cl_cred; /* setclientid principal */
--
1.6.0.6
--
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