s3-prefork: Do not use mmap/mremap/munmap directly

Use the wrappers in util.h as they deal with trying to do the best they can on
platfroms that do not support mmap extensions.

Autobuild-User: Simo Sorce <idra@samba.org>
Autobuild-Date: Mon Aug 15 04:13:51 CEST 2011 on sn-devel-104

diff --git a/source3/lib/server_prefork.c b/source3/lib/server_prefork.c
index 501fbc1b884a63d707f9f79d140e512edf4d53a4..5206c36e8d32bd69bcef9f9b1012d208afc6848e 100644 (file)
--- a/source3/lib/server_prefork.c
+++ b/source3/lib/server_prefork.c
@@ -50,7 +50,7 @@ static bool prefork_setup_sigchld_handler(struct tevent_context *ev_ctx,
 
 static int prefork_pool_destructor(struct prefork_pool *pfp)
 {
-       munmap(pfp->pool, pfp->pool_size * sizeof(struct pf_worker_data));
+       anonymous_shared_free(pfp->pool);
        return 0;
 }
 
@@ -97,9 +97,8 @@ bool prefork_create_pool(TALLOC_CTX *mem_ctx,
        pfp->pool_size = max_children;
        data_size = sizeof(struct pf_worker_data) * max_children;
 
-       pfp->pool = mmap(NULL, data_size, PROT_READ|PROT_WRITE,
-                        MAP_SHARED|MAP_ANONYMOUS, -1, 0);
-       if (pfp->pool == MAP_FAILED) {
+       pfp->pool = anonymous_shared_allocate(data_size);
+       if (pfp->pool == NULL) {
                DEBUG(1, ("Failed to mmap memory for prefork pool!\n"));
                talloc_free(pfp);
                return false;
@@ -153,9 +152,10 @@ bool prefork_create_pool(TALLOC_CTX *mem_ctx,
  */
 int prefork_expand_pool(struct prefork_pool *pfp, int new_max)
 {
-       struct pf_worker_data *pool;
+       struct prefork_pool *pool;
        size_t old_size;
        size_t new_size;
+       int ret;
 
        if (new_max <= pfp->pool_size) {
                return EINVAL;
@@ -164,10 +164,12 @@ int prefork_expand_pool(struct prefork_pool *pfp, int new_max)
        old_size = sizeof(struct pf_worker_data) * pfp->pool_size;
        new_size = sizeof(struct pf_worker_data) * new_max;
 
-       pool = mremap(pfp->pool, old_size, new_size, 0);
-       if (pool == MAP_FAILED) {
-               DEBUG(3, ("Failed to mremap memory for prefork pool!\n"));
-               return ENOSPC;
+       pool = anonymous_shared_resize(&pfp->pool, new_size, false);
+       if (pool == NULL) {
+               ret = errno;
+               DEBUG(3, ("Failed to mremap memory (%d: %s)!\n",
+                         ret, strerror(ret)));
+               return ret;
        }
 
        memset(&pool[pfp->pool_size], 0, new_size - old_size);