From: Chuck Lever Date: Wed, 5 May 2010 19:41:07 +0000 (-0400) Subject: mountd/exportfs: Make m_addrlist field a nfs_sockaddr X-Git-Tag: nfs-utils-1-2-3-rc3 X-Git-Url: https://git.decadent.org.uk/gitweb/?a=commitdiff_plain;h=6299a310d77e6495efdf7c50491f0b055fee2cfe;p=nfs-utils.git mountd/exportfs: Make m_addrlist field a nfs_sockaddr To store non-AF_INET addresses in the nfs_client structure, we need to use more than in_addr for the m_addrlist field. Make m_addrlist larger, then add a few helper functions to handle type casting and array indexing cleanly. We could treat the nfs_client address list as if all the addresses in the list were the same family. This might work for MCL_SUBNETWORK type nfs_clients. However, during the transition to IPv6, most hosts will have at least one IPv4 and one IPv6 address. For MCL_FQDN, I think we need to have the ability to store addresses from both families in one nfs_client. Additionally, IPv6 scope IDs are not part of struct sin6_addr. To support link-local IPv6 addresses and the like, a scope ID must be stored. Thus, each slot in the address list needs to be capable of storing an entire socket address, and not simply the network address part. Signed-off-by: Chuck Lever Signed-off-by: Steve Dickson --- diff --git a/support/export/client.c b/support/export/client.c index 4600255..21ad272 100644 --- a/support/export/client.c +++ b/support/export/client.c @@ -37,6 +37,9 @@ nfs_client *clientlist[MCL_MAXTYPES] = { NULL, }; static void init_addrlist(nfs_client *clp, const struct hostent *hp) { + struct sockaddr_in sin = { + .sin_family = AF_INET, + }; char **ap; int i; @@ -44,9 +47,10 @@ init_addrlist(nfs_client *clp, const struct hostent *hp) return; ap = hp->h_addr_list; - for (i = 0; *ap != NULL && i < NFSCLNT_ADDRMAX; i++, ap++) - clp->m_addrlist[i] = *(struct in_addr *)*ap; - + for (i = 0; *ap != NULL && i < NFSCLNT_ADDRMAX; i++, ap++) { + sin.sin_addr = *(struct in_addr *)*ap; + set_addrlist_in(clp, i, &sin); + } clp->m_naddr = i; } @@ -60,17 +64,22 @@ client_free(nfs_client *clp) static int init_netmask(nfs_client *clp, const char *slash) { + struct sockaddr_in sin = { + .sin_family = AF_INET, + }; + if (strchr(slash + 1, '.') != NULL) - clp->m_addrlist[1].s_addr = inet_addr(slash + 1); + sin.sin_addr.s_addr = inet_addr(slash + 1); else { int prefixlen = atoi(slash + 1); if (0 < prefixlen && prefixlen <= 32) - clp->m_addrlist[1].s_addr = + sin.sin_addr.s_addr = htonl((uint32_t)~0 << (32 - prefixlen)); else goto out_badprefix; } + set_addrlist_in(clp, 1, &sin); return 1; out_badprefix: @@ -81,6 +90,9 @@ out_badprefix: static int init_subnetwork(nfs_client *clp) { + struct sockaddr_in sin = { + .sin_family = AF_INET, + }; static char slash32[] = "/32"; char *cp; @@ -89,7 +101,8 @@ init_subnetwork(nfs_client *clp) cp = slash32; *cp = '\0'; - clp->m_addrlist[0].s_addr = inet_addr(clp->m_hostname); + sin.sin_addr.s_addr = inet_addr(clp->m_hostname); + set_addrlist_in(clp, 0, &sin); *cp = '/'; return init_netmask(clp, cp); @@ -366,6 +379,7 @@ add_name(char *old, const char *add) static int check_fqdn(const nfs_client *clp, const struct hostent *hp) { + const struct sockaddr_in *sin; struct in_addr addr; char **ap; int i; @@ -373,9 +387,11 @@ check_fqdn(const nfs_client *clp, const struct hostent *hp) for (ap = hp->h_addr_list; *ap; ap++) { addr = *(struct in_addr *)*ap; - for (i = 0; i < clp->m_naddr; i++) - if (clp->m_addrlist[i].s_addr == addr.s_addr) + for (i = 0; i < clp->m_naddr; i++) { + sin = get_addrlist_in(clp, i); + if (sin->sin_addr.s_addr == addr.s_addr) return 1; + } } return 0; } @@ -388,14 +404,17 @@ check_fqdn(const nfs_client *clp, const struct hostent *hp) static int check_subnetwork(const nfs_client *clp, const struct hostent *hp) { + const struct sockaddr_in *address, *mask; struct in_addr addr; char **ap; for (ap = hp->h_addr_list; *ap; ap++) { + address = get_addrlist_in(clp, 0); + mask = get_addrlist_in(clp, 1); addr = *(struct in_addr *)*ap; - if (!((clp->m_addrlist[0].s_addr ^ addr.s_addr) & - clp->m_addrlist[1].s_addr)) + if (!((address->sin_addr.s_addr ^ addr.s_addr) & + mask->sin_addr.s_addr)) return 1; } return 0; diff --git a/support/export/nfsctl.c b/support/export/nfsctl.c index e2877b9..ae357c7 100644 --- a/support/export/nfsctl.c +++ b/support/export/nfsctl.c @@ -66,7 +66,7 @@ str_tolower(char *s) static int cltsetup(struct nfsctl_client *cltarg, nfs_client *clp) { - int i; + int i, j; if (clp->m_type != MCL_FQDN) { xlog(L_ERROR, "internal: can't export non-FQDN host"); @@ -76,10 +76,19 @@ cltsetup(struct nfsctl_client *cltarg, nfs_client *clp) strncpy(cltarg->cl_ident, clp->m_hostname, sizeof (cltarg->cl_ident) - 1); str_tolower(cltarg->cl_ident); - cltarg->cl_naddr = clp->m_naddr; - for (i = 0; i < cltarg->cl_naddr && i < NFSCLNT_ADDRMAX; i++) - cltarg->cl_addrlist[i] = clp->m_addrlist[i]; + j = 0; + for (i = 0; i < cltarg->cl_naddr && i < NFSCLNT_ADDRMAX; i++) { + struct sockaddr_in *sin = get_addrlist_in(clp, i); + if (sin->sin_family == AF_INET) + cltarg->cl_addrlist[j++] = sin->sin_addr; + } + if (j == 0) { + xlog(L_ERROR, "internal: no supported addresses in nfs_client"); + return 0; + } + + cltarg->cl_naddr = j; return 1; } diff --git a/support/include/exportfs.h b/support/include/exportfs.h index 05891c5..70bdd57 100644 --- a/support/include/exportfs.h +++ b/support/include/exportfs.h @@ -10,6 +10,8 @@ #define EXPORTFS_H #include + +#include "sockaddr.h" #include "nfslib.h" enum { @@ -35,11 +37,56 @@ typedef struct mclient { char * m_hostname; int m_type; int m_naddr; - struct in_addr m_addrlist[NFSCLNT_ADDRMAX]; + union nfs_sockaddr m_addrlist[NFSCLNT_ADDRMAX]; int m_exported; /* exported to nfsd */ int m_count; } nfs_client; +static inline const struct sockaddr * +get_addrlist(const nfs_client *clp, const int i) +{ + return &clp->m_addrlist[i].sa; +} + +static inline const struct sockaddr_in * +get_addrlist_in(const nfs_client *clp, const int i) +{ + return &clp->m_addrlist[i].s4; +} + +static inline const struct sockaddr_in6 * +get_addrlist_in6(const nfs_client *clp, const int i) +{ + return &clp->m_addrlist[i].s6; +} + +static inline void +set_addrlist_in(nfs_client *clp, const int i, const struct sockaddr_in *sin) +{ + memcpy(&clp->m_addrlist[i].s4, sin, sizeof(*sin)); +} + +static inline void +set_addrlist_in6(nfs_client *clp, const int i, const struct sockaddr_in6 *sin6) +{ + memcpy(&clp->m_addrlist[i].s6, sin6, sizeof(*sin6)); +} + +static inline void +set_addrlist(nfs_client *clp, const int i, const struct sockaddr *sap) +{ + switch (sap->sa_family) { + case AF_INET: + memcpy(&clp->m_addrlist[i].s4, sap, sizeof(struct sockaddr_in)); + break; +#ifdef IPV6_SUPPORTED + case AF_INET6: + memcpy(&clp->m_addrlist[i].s6, sap, sizeof(struct sockaddr_in6)); + break; +#endif + } +} + typedef struct mexport { struct mexport * m_next; struct mclient * m_client; diff --git a/utils/mountd/auth.c b/utils/mountd/auth.c index 13eba70..4b94b98 100644 --- a/utils/mountd/auth.c +++ b/utils/mountd/auth.c @@ -142,7 +142,7 @@ auth_authenticate_newcache(char *what, struct sockaddr_in *caller, return NULL; my_client.m_naddr = 1; - my_client.m_addrlist[0] = caller->sin_addr; + set_addrlist_in(&my_client, 0, caller); my_exp.m_client = &my_client; exp = NULL; diff --git a/utils/mountd/cache.c b/utils/mountd/cache.c index 6343325..caef5b2 100644 --- a/utils/mountd/cache.c +++ b/utils/mountd/cache.c @@ -863,6 +863,7 @@ int cache_export_ent(char *domain, struct exportent *exp, char *path) int cache_export(nfs_export *exp, char *path) { + struct sockaddr_in *sin = get_addrlist_in(exp->m_client, 0); int err; FILE *f; @@ -871,7 +872,7 @@ int cache_export(nfs_export *exp, char *path) return -1; qword_print(f, "nfsd"); - qword_print(f, inet_ntoa(exp->m_client->m_addrlist[0])); + qword_print(f, inet_ntoa(sin->sin_addr)); qword_printint(f, time(0)+30*60); qword_print(f, exp->m_client->m_hostname); err = qword_eol(f);