Hi Aurelien,
Aurélien Charbon wrote:
According to Neil's comments, I have tried to correct the mistakes of my
first sending
I have some more comments.
@@ -1559,6 +1560,7 @@ exp_addclient(struct nfsctl_client *ncp)
{
struct auth_domain *dom;
int i, err;
+ struct in6_addr addr6;
Indentation looks wrong.
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;
Indentation.
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;
Why didn't you use your new ipv6_addr_map() inline here?
@@ -253,6 +260,7 @@ static ssize_t write_getfd(struct file *
{
struct nfsctl_fdparm *data;
struct sockaddr_in *sin;
+ struct in6_addr in6;
Indentation.
@@ -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;
Why didn't you use your new ipv6_addr_map() inline here too?
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)))
I need to update a patch of mine that added a v4-mapped inline, let me
send that out. In the kernel you should use u32 too, is that why you
needed to include linux/net.h?
+/* 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;
+}
This can be void, noone ever checks the return status. Maybe change the
name to ipv6_addr_v4map() too?
@@ -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;
Indentation.
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));
Use ipv6_addr_copy().
@@ -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));
+ }
You'll need more than 20 bytes to print an IPv6 address, I'd make this
at least 44 to account for some fluff. Surprised you didn't crash
during testing.
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;
You might as well fix the indentation while you're here.
@@ -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;
Indentation.
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));
ipv6_addr_copy()
- 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);
These should be ntohs(), it's only a 16-bit quantity. Also, don't you
want to start printing this at addr[0], not addr[7]?
-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));
ipv6_addr_copy()
-Brian
-
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