mountd: regression in crossmounts

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

diff --git a/utils/mountd/cache.c b/utils/mountd/cache.c
index 70e1aa4629084cb2970e61fcb6898b6ed99cf261..978698d399875925cb43b6f33e363be6ae840e7a 100644 (file)
--- a/utils/mountd/cache.c
+++ b/utils/mountd/cache.c
@@ -29,7 +29,6 @@
 #include "nfslib.h"
 #include "exportfs.h"
 #include "mountd.h"
-#include "xmalloc.h"
 #include "fsloc.h"
 #include "pseudoflavors.h"
 
@@ -109,12 +108,10 @@ static void auth_unix_ip(FILE *f)
                struct addrinfo *ai = NULL;
 
                ai = client_resolve(tmp->ai_addr);
-               if (ai == NULL)
-                       goto out;
-               client = client_compose(ai);
-               freeaddrinfo(ai);
-               if (!client)
-                       goto out;
+               if (ai) {
+                       client = client_compose(ai);
+                       freeaddrinfo(ai);
+               }
        }
        qword_print(f, "nfsd");
        qword_print(f, ipaddr);
@@ -127,7 +124,6 @@ static void auth_unix_ip(FILE *f)
        xlog(D_CALL, "auth_unix_ip: client %p '%s'", client, client?client: "DEFAULT");
 
        free(client);
-out:
        freeaddrinfo(tmp);
 
 }
@@ -238,17 +234,17 @@ static const char *get_uuid_blkdev(char *path)
 #define get_uuid_blkdev(path) (NULL)
 #endif
 
-static int get_uuid(const char *val, int uuidlen, char *u)
+static int get_uuid(const char *val, size_t uuidlen, char *u)
 {
        /* extract hex digits from uuidstr and compose a uuid
         * of the given length (max 16), xoring bytes to make
         * a smaller uuid.
         */
-       int i = 0;
+       size_t i = 0;
        
        memset(u, 0, uuidlen);
        for ( ; *val ; val++) {
-               char c = *val;
+               int c = *val;
                if (!isxdigit(c))
                        continue;
                if (isalpha(c)) {
@@ -260,7 +256,7 @@ static int get_uuid(const char *val, int uuidlen, char *u)
                        c = c - '0' + 0;
                if ((i&1) == 0)
                        c <<= 4;
-               u[i/2] ^= c;
+               u[i/2] ^= (char)c;
                i++;
                if (i == uuidlen*2)
                        i = 0;
@@ -268,7 +264,7 @@ static int get_uuid(const char *val, int uuidlen, char *u)
        return 1;
 }
 
-static int uuid_by_path(char *path, int type, int uuidlen, char *uuid)
+static int uuid_by_path(char *path, int type, size_t uuidlen, char *uuid)
 {
        /* get a uuid for the filesystem found at 'path'.
         * There are several possible ways of generating the
@@ -347,6 +343,30 @@ static char *next_mnt(void **v, char *p)
        return me->mnt_dir;
 }
 
+static int is_subdirectory(char *child, char *parent)
+{
+       size_t l = strlen(parent);
+
+       if (strcmp(parent, "/") == 0)
+               return 1;
+
+       return strcmp(child, parent) == 0
+               || (strncmp(child, parent, l) == 0 && child[l] == '/');
+}
+
+static int path_matches(nfs_export *exp, char *path)
+{
+       if (exp->m_export.e_flags & NFSEXP_CROSSMOUNT)
+               return is_subdirectory(path, exp->m_export.e_path);
+       return strcmp(path, exp->m_export.e_path) == 0;
+}
+
+static int
+export_matches(nfs_export *exp, char *dom, char *path, struct addrinfo *ai)
+{
+       return path_matches(exp, path) && client_matches(exp, dom, ai);
+}
+
 /* True iff e1 is a child of e2 and e2 has crossmnt set: */
 static bool subexport(struct exportent *e1, struct exportent *e2)
 {
@@ -354,8 +374,8 @@ static bool subexport(struct exportent *e1, struct exportent *e2)
        size_t l2 = strlen(p2);
 
        return e2->e_flags & NFSEXP_CROSSMOUNT
-              && strncmp(p1, p2, l2) == 0
-              && p1[l2] == '/';
+               && strncmp(p1, p2, l2) == 0
+               && p1[l2] == '/';
 }
 
 struct parsed_fsid {
@@ -366,15 +386,17 @@ struct parsed_fsid {
        unsigned int minor;
        unsigned int major;
        unsigned int fsidnum;
-       int uuidlen;
+       size_t uuidlen;
        char *fhuuid;
 };
 
-int parse_fsid(int fsidtype, int fsidlen, char *fsid, struct parsed_fsid *parsed)
+static int parse_fsid(int fsidtype, int fsidlen, char *fsid,
+               struct parsed_fsid *parsed)
 {
        unsigned int dev;
        unsigned long long inode64;
 
+       memset(parsed, 0, sizeof(*parsed));
        parsed->fsidtype = fsidtype;
        switch(fsidtype) {
        case FSID_DEV: /* 4 bytes: 2 major, 2 minor, 4 inode */
@@ -501,7 +523,7 @@ static bool match_fsid(struct parsed_fsid *parsed, nfs_export *exp, char *path)
        return false;
 }
 
-struct addrinfo *lookup_client_addr(char *dom)
+static struct addrinfo *lookup_client_addr(char *dom)
 {
        struct addrinfo *ret;
        struct addrinfo *tmp;
@@ -754,27 +776,6 @@ static int dump_to_cache(FILE *f, char *domain, char *path, struct exportent *ex
        return qword_eol(f);
 }
 
-static int is_subdirectory(char *child, char *parent)
-{
-       int l = strlen(parent);
-
-       return strcmp(child, parent) == 0
-               || (strncmp(child, parent, l) == 0 && child[l] == '/');
-}
-
-static int path_matches(nfs_export *exp, char *path)
-{
-       if (exp->m_export.e_flags & NFSEXP_CROSSMOUNT)
-               return is_subdirectory(path, exp->m_export.e_path);
-       return strcmp(path, exp->m_export.e_path) == 0;
-}
-
-static int
-export_matches(nfs_export *exp, char *dom, char *path, struct addrinfo *ai)
-{
-       return path_matches(exp, path) && client_matches(exp, dom, ai);
-}
-
 static nfs_export *
 lookup_export(char *dom, char *path, struct addrinfo *ai)
 {
@@ -828,6 +829,7 @@ lookup_export(char *dom, char *path, struct addrinfo *ai)
 
 #ifdef HAVE_NFS_PLUGIN_H
 #include <dlfcn.h>
+#include <link.h>
 #include <nfs-plugin.h>
 
 /*
@@ -1092,6 +1094,7 @@ static struct exportent *lookup_junction(char *dom, const char *pathname,
                struct addrinfo *ai)
 {
        struct exportent *exp;
+       struct link_map *map;
        void *handle;
 
        handle = dlopen("libnfsjunct.so", RTLD_NOW);
@@ -1099,6 +1102,11 @@ static struct exportent *lookup_junction(char *dom, const char *pathname,
                xlog(D_GENERAL, "%s: dlopen: %s", __func__, dlerror());
                return NULL;
        }
+
+       if (dlinfo(handle, RTLD_DI_LINKMAP, &map) == 0)
+               xlog(D_GENERAL, "%s: loaded plug-in %s",
+                       __func__, map->l_name);
+
        (void)dlerror();        /* Clear any error */
 
        exp = invoke_junction_ops(handle, dom, pathname, ai);