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WSL2-Linux-Kernel
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IPv6 support for NFS server export caches 

This adds IPv6 support to the interfaces that are used to express nfsd
exports.  All addressed are stored internally as IPv6; backwards
compatibility is maintained using mapped addresses.

Thanks to Bruce Fields, Brian Haley, Neil Brown and Hideaki Joshifuji
for comments

Signed-off-by: Aurelien Charbon <aurelien.charbon@bull.net>
Cc: Neil Brown <neilb@suse.de>
Cc: Brian Haley <brian.haley@hp.com>
Cc:  YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Aurélien Charbon 2008-01-18 15:50:56 +01:00 коммит произвёл J. Bruce Fields
Родитель d751a7cd06
Коммит f15364bd4c
5 изменённых файлов: 111 добавлений и 45 удалений
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9
fs/nfsd/export.c
Просмотреть файл

@ -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
@ -1548,6 +1549,7 @@ exp_addclient(struct nfsctl_client *ncp)
{
struct auth_domain *dom;
int i, err;
struct in6_addr addr6;
/* First, consistency check. */
err = -EINVAL;
@ -1566,9 +1568,10 @@ 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++) {
ipv6_addr_set_v4mapped(ncp->cl_addrlist[i].s_addr, &addr6);
auth_unix_add_addr(&addr6, dom);
}
auth_unix_forget_old(dom);
auth_domain_put(dom);

15
fs/nfsd/nfsctl.c
Просмотреть файл

@ -37,6 +37,7 @@
#include <linux/nfsd/syscall.h>
#include <asm/uaccess.h>
#include <net/ipv6.h>
/*
* We have a single directory with 9 nodes in it.
@ -222,6 +223,7 @@ static ssize_t write_getfs(struct file *file, char *buf, size_t size)
struct auth_domain *clp;
int err = 0;
struct knfsd_fh *res;
struct in6_addr in6;
if (size < sizeof(*data))
return -EINVAL;
@ -236,7 +238,11 @@ static ssize_t write_getfs(struct file *file, char *buf, size_t size)
res = (struct knfsd_fh*)buf;
exp_readlock();
if (!(clp = auth_unix_lookup(sin->sin_addr)))
ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
clp = auth_unix_lookup(&in6);
if (!clp)
err = -EPERM;
else {
err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
@ -257,6 +263,7 @@ static ssize_t write_getfd(struct file *file, char *buf, size_t size)
int err = 0;
struct knfsd_fh fh;
char *res;
struct in6_addr in6;
if (size < sizeof(*data))
return -EINVAL;
@ -271,7 +278,11 @@ static ssize_t write_getfd(struct file *file, char *buf, size_t size)
res = buf;
sin = (struct sockaddr_in *)&data->gd_addr;
exp_readlock();
if (!(clp = auth_unix_lookup(sin->sin_addr)))
ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
clp = auth_unix_lookup(&in6);
if (!clp)
err = -EPERM;
else {
err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);

5
include/linux/sunrpc/svcauth.h
Просмотреть файл

@ -24,6 +24,7 @@ struct svc_cred {
};
struct svc_rqst; /* forward decl */
struct in6_addr;
/* Authentication is done in the context of a domain.
*
@ -120,10 +121,10 @@ extern void svc_auth_unregister(rpc_authflavor_t flavor);
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 *);

9
include/net/ipv6.h
Просмотреть файл

@ -383,6 +383,15 @@ static inline int ipv6_addr_orchid(const struct in6_addr *a)
== htonl(0x20010010));
}
static inline void ipv6_addr_set_v4mapped(const __be32 addr,
struct in6_addr *v4mapped)
{
ipv6_addr_set(v4mapped,
0, 0,
htonl(0x0000FFFF),
addr);
}
/*
* find the first different bit between two addresses
* length of address must be a multiple of 32bits

118
net/sunrpc/svcauth_unix.c
Просмотреть файл

@ -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
@ -85,7 +86,7 @@ static void svcauth_unix_domain_release(struct auth_domain *dom)
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;
};
@ -113,12 +114,19 @@ 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)
{
@ -126,7 +134,7 @@ static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
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)
{
@ -150,22 +158,24 @@ static void ip_map_request(struct cache_detail *cd,
struct cache_head *h,
char **bpp, int *blen)
{
char text_addr[20];
char text_addr[40];
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,
@ -176,10 +186,10 @@ static int ip_map_parse(struct cache_detail *cd,
* 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;
@ -198,7 +208,23 @@ static int ip_map_parse(struct cache_detail *cd,
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);
@ -216,10 +242,7 @@ static int ip_map_parse(struct cache_detail *cd,
} else
dom = NULL;
addr.s_addr =
htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
ipmp = ip_map_lookup(class,addr);
ipmp = ip_map_lookup(class, &addr);
if (ipmp) {
err = ip_map_update(ipmp,
container_of(dom, struct unix_domain, h),
@ -239,7 +262,7 @@ static int ip_map_show(struct seq_file *m,
struct cache_head *h)
{
struct ip_map *im;
struct in_addr addr;
struct in6_addr addr;
char *dom = "-no-domain-";
if (h == NULL) {
@ -248,20 +271,24 @@ static int ip_map_show(struct seq_file *m,
}
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;
}
@ -281,16 +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);
@ -319,14 +346,14 @@ static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t ex
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;
@ -355,7 +382,7 @@ int auth_unix_forget_old(struct auth_domain *dom)
}
EXPORT_SYMBOL(auth_unix_forget_old);
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;
@ -650,9 +677,24 @@ static int unix_gid_find(uid_t uid, struct group_info **gip,
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, sin6_storage;
struct ip_map *ipm;
switch (rqstp->rq_addr.ss_family) {
case AF_INET:
sin = svc_addr_in(rqstp);
sin6 = &sin6_storage;
ipv6_addr_set(&sin6->sin6_addr, 0, 0,
htonl(0x0000FFFF), sin->sin_addr.s_addr);
break;
case AF_INET6:
sin6 = svc_addr_in6(rqstp);
break;
default:
BUG();
}
rqstp->rq_client = NULL;
if (rqstp->rq_proc == 0)
return SVC_OK;
@ -660,7 +702,7 @@ svcauth_unix_set_client(struct svc_rqst *rqstp)
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;