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 --- diff -p -u -r -N linux-2.6.23-rc5/fs/nfsd/export.c linux-2.6.23-rc5-IPv6-ipmap-cache/fs/nfsd/export.c --- linux-2.6.23-rc5/fs/nfsd/export.c 2007-09-04 13:55:02.000000000 +0200 +++ linux-2.6.23-rc5-IPv6-ipmap-cache/fs/nfsd/export.c 2007-09-04 17:05:47.000000000 +0200 @@ -35,6 +35,7 @@ #include #include #include +#include #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_v4map(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-rc5/fs/nfsd/nfsctl.c linux-2.6.23-rc5-IPv6-ipmap-cache/fs/nfsd/nfsctl.c --- linux-2.6.23-rc5/fs/nfsd/nfsctl.c 2007-09-04 13:55:02.000000000 +0200 +++ linux-2.6.23-rc5-IPv6-ipmap-cache/fs/nfsd/nfsctl.c 2007-09-06 11:17:00.000000000 +0200 @@ -38,6 +38,7 @@ #include +#include /* * We have a single directory with 9 nodes in it. */ @@ -222,7 +223,7 @@ 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 +237,11 @@ 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 */ + ipv6_addr_v4map(sin->sin_addr, in6); + + if (!(clp = auth_unix_lookup(in6))) err = -EPERM; else { err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); @@ -253,6 +258,7 @@ 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 +277,11 @@ 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 */ + ipv6_addr_v4map(sin->sin_addr, in6); + + 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-rc5/include/linux/sunrpc/svcauth.h linux-2.6.23-rc5-IPv6-ipmap-cache/include/linux/sunrpc/svcauth.h --- linux-2.6.23-rc5/include/linux/sunrpc/svcauth.h 2007-09-04 13:55:03.000000000 +0200 +++ linux-2.6.23-rc5-IPv6-ipmap-cache/include/linux/sunrpc/svcauth.h 2007-09-04 14:37:21.000000000 +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-rc5/include/net/ipv6.h linux-2.6.23-rc5-IPv6-ipmap-cache/include/net/ipv6.h --- linux-2.6.23-rc5/include/net/ipv6.h 2007-09-04 16:32:38.000000000 +0200 +++ linux-2.6.23-rc5-IPv6-ipmap-cache/include/net/ipv6.h 2007-09-05 10:01:51.000000000 +0200 @@ -21,6 +21,7 @@ #include #include #include +#include #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 +384,14 @@ static inline int ipv6_addr_any(const st a->s6_addr32[2] | a->s6_addr32[3] ) == 0); } +static inline void ipv6_addr_v4map(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; +} + static inline int ipv6_addr_v4mapped(const struct in6_addr *a) { return ((a->s6_addr32[0] | a->s6_addr32[1]) == 0 && diff -p -u -r -N linux-2.6.23-rc5/net/sunrpc/svcauth_unix.c linux-2.6.23-rc5-IPv6-ipmap-cache/net/sunrpc/svcauth_unix.c --- linux-2.6.23-rc5/net/sunrpc/svcauth_unix.c 2007-09-04 13:55:04.000000000 +0200 +++ linux-2.6.23-rc5-IPv6-ipmap-cache/net/sunrpc/svcauth_unix.c 2007-09-06 10:30:19.000000000 +0200 @@ -11,7 +11,8 @@ #include #include #include - +#include +#include #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; + ipv6_addr_copy(&(new->m_addr), &(item->m_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 (ipv6_addr_v4mapped(&(im->m_addr))) { + 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, 40, 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[0] = htons(b1); + addr.s6_addr16[1] = htons(b2); + addr.s6_addr16[2] = htons(b3); + addr.s6_addr16[3] = htons(b4); + addr.s6_addr16[4] = htons(b5); + addr.s6_addr16[5] = htons(b6); + addr.s6_addr16[6] = htons(b7); + addr.s6_addr16[7] = 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 +271,24 @@ static int ip_map_show(struct seq_file * } im = container_of(h, struct ip_map, h); /* class addr domain */ - addr = im->m_addr; + ipv6_addr_copy(&addr, &im->m_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 (ipv6_addr_v4mapped(&addr)) { + 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, NIP6(addr), dom); + } return 0; } @@ -280,16 +308,16 @@ 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; + ipv6_addr_copy(&ip.m_addr, &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 +346,14 @@ 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 +380,7 @@ 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 +669,19 @@ 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_v4map(sin->sin_addr, sin6->sin6_addr); + case AF_INET6: + sin6 = svc_addr_in6(rqstp); + } + struct ip_map *ipm; rqstp->rq_client = NULL; @@ -651,7 +691,7 @@ 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;