statd: Replace note() with xlog() in rpc.statd

[nfs-utils.git] / utils / mountd / auth.c

diff --git a/utils/mountd/auth.c b/utils/mountd/auth.c
index 183c9ea8c5b27b747925b832405333543eba97f0..5a7ff8cd0fb81239eb5b717db3749bc7a665f196 100644 (file)
--- a/utils/mountd/auth.c
+++ b/utils/mountd/auth.c
@@ -14,6 +14,7 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <errno.h>
+#include <unistd.h>
 #include "misc.h"
 #include "nfslib.h"
 #include "exportfs.h"
@@ -36,6 +37,7 @@ static nfs_export my_exp;
 static nfs_client my_client;
 
 extern int new_cache;
+extern int use_ipaddr;
 
 void
 auth_init(char *exports)
@@ -46,24 +48,63 @@ auth_init(char *exports)
        xtab_mount_write();
 }
 
-time_t
+/*
+ * A client can match many different netgroups and it's tough to know
+ * beforehand whether it will. If the concatenated string of netgroup
+ * m_hostnames is >512 bytes, then enable the "use_ipaddr" mode. This
+ * makes mountd change how it matches a client ip address when a mount
+ * request comes in. It's more efficient at handling netgroups at the
+ * expense of larger kernel caches.
+ */
+static void
+check_useipaddr(void)
+{
+       nfs_client *clp;
+       int old_use_ipaddr = use_ipaddr;
+       unsigned int len = 0;
+
+       /* add length of m_hostname + 1 for the comma */
+       for (clp = clientlist[MCL_NETGROUP]; clp; clp = clp->m_next)
+               len += (strlen(clp->m_hostname) + 1);
+
+       if (len > (NFSCLNT_IDMAX / 2))
+               use_ipaddr = 1;
+       else
+               use_ipaddr = 0;
+
+       if (use_ipaddr != old_use_ipaddr)
+               cache_flush(1);
+}
+
+unsigned int
 auth_reload()
 {
        struct stat             stb;
-       static time_t           last_modified = 0;
-
-       if (stat(_PATH_ETAB, &stb) < 0)
+       static ino_t            last_inode;
+       static int              last_fd;
+       static unsigned int     counter;
+       int                     fd;
+
+       if ((fd = open(_PATH_ETAB, O_RDONLY)) < 0) {
+               xlog(L_FATAL, "couldn't open %s", _PATH_ETAB);
+       } else if (fstat(fd, &stb) < 0) {
                xlog(L_FATAL, "couldn't stat %s", _PATH_ETAB);
-       if (stb.st_mtime == last_modified)
-               return last_modified;
-       last_modified = stb.st_mtime;
+       } else if (stb.st_ino == last_inode) {
+               close(fd);
+               return counter;
+       } else {
+               close(last_fd);
+               last_fd = fd;
+               last_inode = stb.st_ino;
+       }
 
        export_freeall();
        memset(&my_client, 0, sizeof(my_client));
-       // export_read(export_file);
        xtab_export_read();
+       check_useipaddr();
+       ++counter;
 
-       return last_modified;
+       return counter;
 }
 
 static nfs_export *
@@ -77,23 +118,37 @@ auth_authenticate_internal(char *what, struct sockaddr_in *caller,
                int i;
                /* return static nfs_export with details filled in */
                char *n;
-               my_client.m_addrlist[0] = caller->sin_addr;
-               n = client_compose(caller->sin_addr);
-               *error = unknown_host;
-               if (!n)
+               free(my_client.m_hostname);
+               if (use_ipaddr) {
+                       my_client.m_hostname =
+                               strdup(inet_ntoa(caller->sin_addr));
+               } else {
+                       n = client_compose(hp);
+                       *error = unknown_host;
+                       if (!n)
+                               my_client.m_hostname = NULL;
+                       else if (*n)
+                               my_client.m_hostname = n;
+                       else {
+                               free(n);
+                               my_client.m_hostname = strdup("DEFAULT");
+                       }
+               }
+               if (my_client.m_hostname == NULL)
                        return NULL;
-               strcpy(my_client.m_hostname, *n?n:"DEFAULT");
-               free(n);
                my_client.m_naddr = 1;
+               my_client.m_addrlist[0] = caller->sin_addr;
                my_exp.m_client = &my_client;
 
                exp = NULL;
                for (i = 0; !exp && i < MCL_MAXTYPES; i++) 
-                       for (exp = exportlist[i]; exp; exp = exp->m_next) {
-                               if (!client_member(my_client.m_hostname, exp->m_client->m_hostname))
-                                       continue;
+                       for (exp = exportlist[i].p_head; exp; exp = exp->m_next) {
                                if (strcmp(path, exp->m_export.e_path))
                                        continue;
+                               if (!use_ipaddr && !client_member(my_client.m_hostname, exp->m_client->m_hostname))
+                                       continue;
+                               if (use_ipaddr && !client_check(exp->m_client, hp))
+                                       continue;
                                break;
                        }
                *error = not_exported;
@@ -114,8 +169,7 @@ auth_authenticate_internal(char *what, struct sockaddr_in *caller,
                }
        }
        if (!(exp->m_export.e_flags & NFSEXP_INSECURE_PORT) &&
-                   (ntohs(caller->sin_port) <  IPPORT_RESERVED/2 ||
-                    ntohs(caller->sin_port) >= IPPORT_RESERVED)) {
+                    ntohs(caller->sin_port) >= IPPORT_RESERVED) {
                *error = illegal_port;
                return NULL;
        }
@@ -132,7 +186,7 @@ auth_authenticate(char *what, struct sockaddr_in *caller, char *path)
        char            *p = NULL;
        struct hostent  *hp = NULL;
        struct in_addr  addr = caller->sin_addr;
-       enum auth_error error;
+       enum auth_error error = bad_path;
 
        if (path [0] != '/') {
                xlog(L_WARNING, "bad path in %s request from %s: \"%s\"",
@@ -144,11 +198,7 @@ auth_authenticate(char *what, struct sockaddr_in *caller, char *path)
        epath[sizeof (epath) - 1] = '\0';
        auth_fixpath(epath); /* strip duplicate '/' etc */
 
-       hp = get_reliable_hostbyaddr((const char*)&caller->sin_addr, sizeof(struct in_addr),
-                                    AF_INET);
-       if (!hp)
-               hp = get_hostent((const char*)&caller->sin_addr, sizeof(struct in_addr),
-                                    AF_INET);
+       hp = client_resolve(caller->sin_addr);
        if (!hp)
                return exp;
 
@@ -172,7 +222,7 @@ auth_authenticate(char *what, struct sockaddr_in *caller, char *path)
                break;
 
        case unknown_host:
-               xlog(L_WARNING, "%s request from unknown host %s for %s (%s)",
+               xlog(L_WARNING, "refused %s request from %s for %s (%s): unmatched host",
                     what, inet_ntoa(addr), path, epath);
                break;