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Message-ID: <46CD890C.2040502@ext.bull.net>
Date: Thu, 23 Aug 2007 15:18:04 +0200
From: Aurélien Charbon <aurelien.charbon@....bull.net>
To: Mailing list NFSv4 <nfsv4@...ux-nfs.org>,
netdev ML <netdev@...r.kernel.org>
Subject: [PATCH 1/1] NFS: change the ip_map cache code to handle IPv6 addresses
According to Neil's comments, I have tried to correct the mistakes of my first sending
Thank you for these comments Neil.
This is a small part of missing pieces of IPv6 support for the server.
It deals with the ip_map caching code part.
It changes the ip_map structure to be able to store INET6 addresses.
It adds also the changes in address hashing, and mapping to test it with INET addresses.
Signed-off-by: Aurelien Charbon <aurelien.charbon@....bull.net>
---
fs/nfsd/export.c | 10 ++-
fs/nfsd/nfsctl.c | 21 ++++++-
include/linux/sunrpc/svcauth.h | 4 -
include/net/ipv6.h | 17 +++++
net/sunrpc/svcauth_unix.c | 121
++++++++++++++++++++++++++++-------------
5 files changed, 129 insertions(+), 44 deletions(-)
diff -p -u -r -N linux-2.6.23-rc3/fs/nfsd/export.c
linux-2.6.23-rc3-IPv6-ipmap-cache/fs/nfsd/export.c
--- linux-2.6.23-rc3/fs/nfsd/export.c 2007-08-23 13:18:16.000000000 +0200
+++ linux-2.6.23-rc3-IPv6-ipmap-cache/fs/nfsd/export.c 2007-08-23
13:51:08.000000000 +0200
@@ -35,6 +35,7 @@
#include <linux/lockd/bind.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/gss_api.h>
+#include <net/ipv6.h>
#define NFSDDBG_FACILITY NFSDDBG_EXPORT
@@ -1559,6 +1560,7 @@ exp_addclient(struct nfsctl_client *ncp)
{
struct auth_domain *dom;
int i, err;
+ struct in6_addr addr6;
/* First, consistency check. */
err = -EINVAL;
@@ -1577,9 +1579,11 @@ exp_addclient(struct nfsctl_client *ncp)
goto out_unlock;
/* Insert client into hashtable. */
- for (i = 0; i < ncp->cl_naddr; i++)
- auth_unix_add_addr(ncp->cl_addrlist[i], dom);
-
+ for (i = 0; i < ncp->cl_naddr; i++) {
+ /* Mapping address */
+ ipv6_addr_map(ncp->cl_addrlist[i], addr6);
+ auth_unix_add_addr(addr6, dom);
+ }
auth_unix_forget_old(dom);
auth_domain_put(dom);
diff -p -u -r -N linux-2.6.23-rc3/fs/nfsd/nfsctl.c
linux-2.6.23-rc3-IPv6-ipmap-cache/fs/nfsd/nfsctl.c
--- linux-2.6.23-rc3/fs/nfsd/nfsctl.c 2007-08-23 13:18:16.000000000 +0200
+++ linux-2.6.23-rc3-IPv6-ipmap-cache/fs/nfsd/nfsctl.c 2007-08-23
13:25:28.000000000 +0200
@@ -222,7 +222,7 @@ static ssize_t write_getfs(struct file *
struct auth_domain *clp;
int err = 0;
struct knfsd_fh *res;
-
+ struct in6_addr in6;
if (size < sizeof(*data))
return -EINVAL;
data = (struct nfsctl_fsparm*)buf;
@@ -236,7 +236,14 @@ static ssize_t write_getfs(struct file *
res = (struct knfsd_fh*)buf;
exp_readlock();
- if (!(clp = auth_unix_lookup(sin->sin_addr)))
+
+ /* IPv6 address mapping */
+ in6.s6_addr32[0] = 0;
+ in6.s6_addr32[1] = 0;
+ in6.s6_addr32[2] = htonl(0xffff);
+ in6.s6_addr32[3] = (uint32_t)sin->sin_addr.s_addr;
+
+ if (!(clp = auth_unix_lookup(in6)))
err = -EPERM;
else {
err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
@@ -253,6 +260,7 @@ static ssize_t write_getfd(struct file *
{
struct nfsctl_fdparm *data;
struct sockaddr_in *sin;
+ struct in6_addr in6;
struct auth_domain *clp;
int err = 0;
struct knfsd_fh fh;
@@ -271,7 +279,14 @@ static ssize_t write_getfd(struct file *
res = buf;
sin = (struct sockaddr_in *)&data->gd_addr;
exp_readlock();
- if (!(clp = auth_unix_lookup(sin->sin_addr)))
+
+ /* IPv6 address mapping */
+ in6.s6_addr32[0] = 0;
+ in6.s6_addr32[1] = 0;
+ in6.s6_addr32[2] = htonl(0xffff);
+ in6.s6_addr32[3] = (uint32_t)sin->sin_addr.s_addr;
+
+ if (!(clp = auth_unix_lookup(in6)))
err = -EPERM;
else {
err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
diff -p -u -r -N linux-2.6.23-rc3/include/linux/sunrpc/svcauth.h
linux-2.6.23-rc3-IPv6-ipmap-cache/include/linux/sunrpc/svcauth.h
--- linux-2.6.23-rc3/include/linux/sunrpc/svcauth.h 2007-08-23
13:18:21.000000000 +0200
+++ linux-2.6.23-rc3-IPv6-ipmap-cache/include/linux/sunrpc/svcauth.h
2007-08-23 13:25:28.000000000 +0200
@@ -120,10 +120,10 @@ extern void svc_auth_unregister(rpc_auth
extern struct auth_domain *unix_domain_find(char *name);
extern void auth_domain_put(struct auth_domain *item);
-extern int auth_unix_add_addr(struct in_addr addr, struct auth_domain
*dom);
+extern int auth_unix_add_addr(struct in6_addr addr, struct auth_domain
*dom);
extern struct auth_domain *auth_domain_lookup(char *name, struct
auth_domain *new);
extern struct auth_domain *auth_domain_find(char *name);
-extern struct auth_domain *auth_unix_lookup(struct in_addr addr);
+extern struct auth_domain *auth_unix_lookup(struct in6_addr addr);
extern int auth_unix_forget_old(struct auth_domain *dom);
extern void svcauth_unix_purge(void);
extern void svcauth_unix_info_release(void *);
diff -p -u -r -N linux-2.6.23-rc3/include/net/ipv6.h
linux-2.6.23-rc3-IPv6-ipmap-cache/include/net/ipv6.h
--- linux-2.6.23-rc3/include/net/ipv6.h 2007-08-23 13:18:23.000000000
+0200
+++ linux-2.6.23-rc3-IPv6-ipmap-cache/include/net/ipv6.h 2007-08-23
13:25:28.000000000 +0200
@@ -21,6 +21,7 @@
#include <net/ndisc.h>
#include <net/flow.h>
#include <net/snmp.h>
+#include <linux/in.h>
#define SIN6_LEN_RFC2133 24
@@ -167,6 +168,12 @@ DECLARE_SNMP_STAT(struct udp_mib, udplit
if (is_udplite) SNMP_INC_STATS_USER(udplite_stats_in6,
field); \
else SNMP_INC_STATS_USER(udp_stats_in6, field); } while(0)
+#define IS_ADDR_MAPPED(a) \
+ (((uint32_t *) (a))[0] == 0 \
+ && ((uint32_t *) (a))[1] == 0 \
+ && (((uint32_t *) (a))[2] == 0 \
+ || ((uint32_t *) (a))[2] == htonl(0xffff)))
+
struct ip6_ra_chain
{
struct ip6_ra_chain *next;
@@ -377,6 +384,16 @@ static inline int ipv6_addr_any(const st
a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
}
+/* Maps a IPv4 address into a wright IPv6 address */
+static inline int ipv6_addr_map(const struct in_addr a1, struct
in6_addr a2)
+{
+ a2.s6_addr32[0] = 0;
+ a2.s6_addr32[1] = 0;
+ a2.s6_addr32[2] = htonl(0xffff);
+ a2.s6_addr32[3] = (uint32_t)a1.s_addr;
+ return 0;
+}
+
/*
* find the first different bit between two addresses
* length of address must be a multiple of 32bits
diff -p -u -r -N linux-2.6.23-rc3/net/sunrpc/svcauth_unix.c
linux-2.6.23-rc3-IPv6-ipmap-cache/net/sunrpc/svcauth_unix.c
--- linux-2.6.23-rc3/net/sunrpc/svcauth_unix.c 2007-08-23
13:18:24.000000000 +0200
+++ linux-2.6.23-rc3-IPv6-ipmap-cache/net/sunrpc/svcauth_unix.c
2007-08-23 13:52:02.000000000 +0200
@@ -11,7 +11,8 @@
#include <linux/hash.h>
#include <linux/string.h>
#include <net/sock.h>
-
+#include <net/ipv6.h>
+#include <linux/kernel.h>
#define RPCDBG_FACILITY RPCDBG_AUTH
@@ -84,7 +85,7 @@ static void svcauth_unix_domain_release(
struct ip_map {
struct cache_head h;
char m_class[8]; /* e.g. "nfsd" */
- struct in_addr m_addr;
+ struct in6_addr m_addr;
struct unix_domain *m_client;
int m_add_change;
};
@@ -112,12 +113,19 @@ static inline int hash_ip(__be32 ip)
return (hash ^ (hash>>8)) & 0xff;
}
#endif
+static inline int hash_ip6(struct in6_addr ip)
+{
+ return (hash_ip(ip.s6_addr32[0]) ^
+ hash_ip(ip.s6_addr32[1]) ^
+ hash_ip(ip.s6_addr32[2]) ^
+ hash_ip(ip.s6_addr32[3]));
+}
static int ip_map_match(struct cache_head *corig, struct cache_head *cnew)
{
struct ip_map *orig = container_of(corig, struct ip_map, h);
struct ip_map *new = container_of(cnew, struct ip_map, h);
return strcmp(orig->m_class, new->m_class) == 0
- && orig->m_addr.s_addr == new->m_addr.s_addr;
+ && ipv6_addr_equal(&orig->m_addr, &new->m_addr);
}
static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
{
@@ -125,7 +133,7 @@ static void ip_map_init(struct cache_hea
struct ip_map *item = container_of(citem, struct ip_map, h);
strcpy(new->m_class, item->m_class);
- new->m_addr.s_addr = item->m_addr.s_addr;
+ memcpy(&(new->m_addr), &(item->m_addr), sizeof(struct in6_addr));
}
static void update(struct cache_head *cnew, struct cache_head *citem)
{
@@ -151,20 +159,22 @@ static void ip_map_request(struct cache_
{
char text_addr[20];
struct ip_map *im = container_of(h, struct ip_map, h);
- __be32 addr = im->m_addr.s_addr;
-
- snprintf(text_addr, 20, "%u.%u.%u.%u",
- ntohl(addr) >> 24 & 0xff,
- ntohl(addr) >> 16 & 0xff,
- ntohl(addr) >> 8 & 0xff,
- ntohl(addr) >> 0 & 0xff);
+ if (IS_ADDR_MAPPED(im->m_addr.s6_addr32)) {
+ snprintf(text_addr, 20, NIPQUAD_FMT,
+ ntohl(im->m_addr.s6_addr32[3]) >> 24 & 0xff,
+ ntohl(im->m_addr.s6_addr32[3]) >> 16 & 0xff,
+ ntohl(im->m_addr.s6_addr32[3]) >> 8 & 0xff,
+ ntohl(im->m_addr.s6_addr32[3]) >> 0 & 0xff);
+ } else {
+ snprintf(text_addr, 20, NIP6_FMT, NIP6(im->m_addr));
+ }
qword_add(bpp, blen, im->m_class);
qword_add(bpp, blen, text_addr);
(*bpp)[-1] = '\n';
}
-static struct ip_map *ip_map_lookup(char *class, struct in_addr addr);
+static struct ip_map *ip_map_lookup(char *class, struct in6_addr addr);
static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom,
time_t expiry);
static int ip_map_parse(struct cache_detail *cd,
@@ -175,10 +185,10 @@ static int ip_map_parse(struct cache_det
* for scratch: */
char *buf = mesg;
int len;
- int b1,b2,b3,b4;
+ int b1, b2, b3, b4, b5, b6, b7, b8;
char c;
char class[8];
- struct in_addr addr;
+ struct in6_addr addr;
int err;
struct ip_map *ipmp;
@@ -197,9 +207,26 @@ static int ip_map_parse(struct cache_det
len = qword_get(&mesg, buf, mlen);
if (len <= 0) return -EINVAL;
- if (sscanf(buf, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4)
+ if (sscanf(buf, NIPQUAD_FMT "%c", &b1, &b2, &b3, &b4, &c) == 4) {
+ addr.s6_addr32[0] = 0;
+ addr.s6_addr32[1] = 0;
+ addr.s6_addr32[2] = htonl(0xffff);
+ addr.s6_addr32[3] =
+ htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
+ } else if (sscanf(buf, NIP6_FMT "%c",
+ &b1, &b2, &b3, &b4, &b5, &b6, &b7, &b8, &c) == 8) {
+ addr.s6_addr16[7] = htons(b1);
+ addr.s6_addr16[6] = htons(b2);
+ addr.s6_addr16[5] = htons(b3);
+ addr.s6_addr16[4] = htons(b4);
+ addr.s6_addr16[3] = htons(b5);
+ addr.s6_addr16[2] = htons(b6);
+ addr.s6_addr16[1] = htons(b7);
+ addr.s6_addr16[0] = htons(b8);
+ } else
return -EINVAL;
+
expiry = get_expiry(&mesg);
if (expiry ==0)
return -EINVAL;
@@ -215,9 +242,6 @@ static int ip_map_parse(struct cache_det
} else
dom = NULL;
- addr.s_addr =
- htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
-
ipmp = ip_map_lookup(class,addr);
if (ipmp) {
err = ip_map_update(ipmp,
@@ -238,7 +262,7 @@ static int ip_map_show(struct seq_file *
struct cache_head *h)
{
struct ip_map *im;
- struct in_addr addr;
+ struct in6_addr addr;
char *dom = "-no-domain-";
if (h == NULL) {
@@ -247,20 +271,33 @@ static int ip_map_show(struct seq_file *
}
im = container_of(h, struct ip_map, h);
/* class addr domain */
- addr = im->m_addr;
+ memcpy(&addr, &im->m_addr, sizeof(struct in6_addr));
if (test_bit(CACHE_VALID, &h->flags) &&
!test_bit(CACHE_NEGATIVE, &h->flags))
dom = im->m_client->h.name;
- seq_printf(m, "%s %d.%d.%d.%d %s\n",
- im->m_class,
- ntohl(addr.s_addr) >> 24 & 0xff,
- ntohl(addr.s_addr) >> 16 & 0xff,
- ntohl(addr.s_addr) >> 8 & 0xff,
- ntohl(addr.s_addr) >> 0 & 0xff,
- dom
- );
+ if (IS_ADDR_MAPPED(addr.s6_addr32)) {
+ seq_printf(m, "%s" NIPQUAD_FMT "%s\n",
+ im->m_class,
+ ntohl(addr.s6_addr32[3]) >> 24 & 0xff,
+ ntohl(addr.s6_addr32[3]) >> 16 & 0xff,
+ ntohl(addr.s6_addr32[3]) >> 8 & 0xff,
+ ntohl(addr.s6_addr32[3]) >> 0 & 0xff,
+ dom);
+ } else {
+ seq_printf(m, "%s" NIP6_FMT "%s\n",
+ im->m_class,
+ ntohl(addr.s6_addr16[7]),
+ ntohl(addr.s6_addr16[6]),
+ ntohl(addr.s6_addr16[5]),
+ ntohl(addr.s6_addr16[4]),
+ ntohl(addr.s6_addr16[3]),
+ ntohl(addr.s6_addr16[2]),
+ ntohl(addr.s6_addr16[1]),
+ ntohl(addr.s6_addr16[0]),
+ dom);
+ }
return 0;
}
@@ -280,16 +317,16 @@ struct cache_detail ip_map_cache = {
.alloc = ip_map_alloc,
};
-static struct ip_map *ip_map_lookup(char *class, struct in_addr addr)
+static struct ip_map *ip_map_lookup(char *class, struct in6_addr addr)
{
struct ip_map ip;
struct cache_head *ch;
strcpy(ip.m_class, class);
- ip.m_addr = addr;
+ memcpy(&ip.m_addr, &addr, sizeof(struct in6_addr));
ch = sunrpc_cache_lookup(&ip_map_cache, &ip.h,
hash_str(class, IP_HASHBITS) ^
- hash_ip(addr.s_addr));
+ hash_ip6(addr));
if (ch)
return container_of(ch, struct ip_map, h);
@@ -318,14 +355,14 @@ static int ip_map_update(struct ip_map *
ch = sunrpc_cache_update(&ip_map_cache,
&ip.h, &ipm->h,
hash_str(ipm->m_class, IP_HASHBITS) ^
- hash_ip(ipm->m_addr.s_addr));
+ hash_ip6(ipm->m_addr));
if (!ch)
return -ENOMEM;
cache_put(ch, &ip_map_cache);
return 0;
}
-int auth_unix_add_addr(struct in_addr addr, struct auth_domain *dom)
+int auth_unix_add_addr(struct in6_addr addr, struct auth_domain *dom)
{
struct unix_domain *udom;
struct ip_map *ipmp;
@@ -352,7 +389,7 @@ int auth_unix_forget_old(struct auth_dom
return 0;
}
-struct auth_domain *auth_unix_lookup(struct in_addr addr)
+struct auth_domain *auth_unix_lookup(struct in6_addr addr)
{
struct ip_map *ipm;
struct auth_domain *rv;
@@ -641,7 +678,19 @@ static int unix_gid_find(uid_t uid, stru
int
svcauth_unix_set_client(struct svc_rqst *rqstp)
{
- struct sockaddr_in *sin = svc_addr_in(rqstp);
+ struct sockaddr_in *sin;
+ struct sockaddr_in6 *sin6;
+
+ switch (rqstp->rq_addr.ss_family) {
+ default:
+ BUG();
+ case AF_INET:
+ sin = svc_addr_in(rqstp);
+ ipv6_addr_map(sin->sin_addr, sin6->sin6_addr);
+ case AF_INET6:
+ sin6 = svc_addr_in6(rqstp);
+ }
+
struct ip_map *ipm;
rqstp->rq_client = NULL;
@@ -651,7 +700,7 @@ svcauth_unix_set_client(struct svc_rqst
ipm = ip_map_cached_get(rqstp);
if (ipm == NULL)
ipm = ip_map_lookup(rqstp->rq_server->sv_program->pg_class,
- sin->sin_addr);
+ sin6->sin6_addr);
if (ipm == NULL)
return SVC_DENIED;
--
********************************
Aurelien Charbon
Linux NFSv4 team
Bull SAS
Echirolles - France
http://nfsv4.bullopensource.org/
********************************
-
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