From: Jim Jagielski <jim@apache.org>
Date: Sun, 23 Feb 2003 17:12:43 +0000 (+0000)
Subject: Right now SSLMutex is bogus. It just uses APR_LOCK_DEFAULT no
X-Git-Tag: pre_ajp_proxy~2089
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=694eb48baea2effb9782b3a28df609e3b6777cec;p=apache

Right now SSLMutex is bogus. It just uses APR_LOCK_DEFAULT no
matter what. We now allow for the full range of APR mutex
locking mechanims to be used, while maintaining backwards
compatibility.

PR: 8122
Obtained from:
Submitted by:
Reviewed by:	William Rowe


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@98771 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/CHANGES b/CHANGES
index 7bba34c25e..acb40a7eb6 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2,6 +2,11 @@ Changes with Apache 2.1.0-dev
 
   [Remove entries to the current 2.0 section below, when backported]
 
+  *) Allow SSLMutex to select/use the full range of APR locking
+     mechanisms available to it. Also, fix the bug that SSLMutex uses
+     APR_LOCK_DEFAULT no matter what.  PR 8122  [Jim Jagielski,
+     martin.t.kutschker@blackbox.net (Martin Kutschker)]
+
   *) Return 413 if chunk-ext-header is too long rather than reading from
      the truncated line.  PR 15857.  [Justin Erenkrantz]
 
diff --git a/modules/ssl/mod_ssl.c b/modules/ssl/mod_ssl.c
index 1b2e207b05..9195ee65fc 100644
--- a/modules/ssl/mod_ssl.c
+++ b/modules/ssl/mod_ssl.c
@@ -79,13 +79,36 @@
 
 #define AP_END_CMD { NULL }
 
+const char ssl_valid_ssl_mutex_string[] =
+    "Valid SSLMutex mechanisms are: `none', `default'"
+#if APR_HAS_FLOCK_SERIALIZE
+    ", `flock:/path/to/file'"
+#endif
+#if APR_HAS_FCNTL_SERIALIZE
+    ", `fcntl:/path/to/file'"
+#endif
+#if APR_HAS_SYSVSEM_SERIALIZE && !defined(PERCHILD_MPM)
+    ", `sysvsem'"
+#endif
+#if APR_HAS_POSIXSEM_SERIALIZE
+    ", `posixsem'"
+#endif
+#if APR_HAS_PROC_PTHREAD_SERIALIZE
+    ", `pthread'"
+#endif
+#if APR_HAS_FLOCK_SERIALIZE || APR_HAS_FCNTL_SERIALIZE
+    ", `file:/path/to/file'"
+#endif
+#if (APR_HAS_SYSVSEM_SERIALIZE && !defined(PERCHILD_MPM)) || APR_HAS_POSIXSEM_SERIALIZE
+    ", `sem'"
+#endif
+    " ";
+
 static const command_rec ssl_config_cmds[] = {
     /*
      * Global (main-server) context configuration directives
      */
-    SSL_CMD_SRV(Mutex, TAKE1,
-                "SSL lock for handling internal mutual exclusions "
-                "(`none', `file:/path/to/file')")
+    SSL_CMD_SRV(Mutex, TAKE1, ssl_valid_ssl_mutex_string)
     SSL_CMD_SRV(PassPhraseDialog, TAKE1,
                 "SSL dialog mechanism for the pass phrase query "
                 "(`builtin', `|/path/to/pipe_program`, "
diff --git a/modules/ssl/mod_ssl.h b/modules/ssl/mod_ssl.h
index 8eb1314075..bd451a9064 100644
--- a/modules/ssl/mod_ssl.h
+++ b/modules/ssl/mod_ssl.h
@@ -420,6 +420,7 @@ typedef struct {
     apr_rmm_t      *pSessionCacheDataRMM;
     apr_table_t    *tSessionCacheDataTable;
     ssl_mutexmode_t nMutexMode;
+    apr_lockmech_e  nMutexMech;
     const char     *szMutexFile;
     apr_global_mutex_t   *pMutex;
     apr_array_header_t   *aRandSeed;
@@ -529,6 +530,9 @@ typedef struct {
 /*  API glue structures  */
 extern module AP_MODULE_DECLARE_DATA ssl_module;
 
+/* "global" stuff */
+extern const char ssl_valid_ssl_mutex_string[];
+
 /*  configuration handling   */
 SSLModConfigRec *ssl_config_global_create(server_rec *);
 void         ssl_config_global_fix(SSLModConfigRec *);
diff --git a/modules/ssl/ssl_engine_config.c b/modules/ssl/ssl_engine_config.c
index 41ea45c46a..f3020edbe5 100644
--- a/modules/ssl/ssl_engine_config.c
+++ b/modules/ssl/ssl_engine_config.c
@@ -99,6 +99,7 @@ SSLModConfigRec *ssl_config_global_create(server_rec *s)
     mc->pSessionCacheDataRMM   = NULL;
     mc->tSessionCacheDataTable = NULL;
     mc->nMutexMode             = SSL_MUTEXMODE_UNSET;
+    mc->nMutexMech             = APR_LOCK_DEFAULT;
     mc->szMutexFile            = NULL;
     mc->pMutex                 = NULL;
     mc->aRandSeed              = apr_array_make(pool, 4,
@@ -383,6 +384,60 @@ const char *ssl_cmd_SSLMutex(cmd_parms *cmd,
     if (strcEQ(arg, "none") || strcEQ(arg, "no")) {
         mc->nMutexMode  = SSL_MUTEXMODE_NONE;
     }
+    /* NOTE: previously, 'yes' implied 'sem' */
+    else if (strcEQ(arg, "default") || strcEQ(arg, "yes")) {
+        mc->nMutexMode  = SSL_MUTEXMODE_USED;
+        mc->nMutexMech = APR_LOCK_DEFAULT;
+        mc->szMutexFile = NULL; /* APR determines temporary filename */
+    }
+#if APR_HAS_FLOCK_SERIALIZE
+    else if (strlen(arg) > 6 && strcEQn(arg, "flock:", 6)) {
+        const char *file = ap_server_root_relative(cmd->pool, arg+6);
+        if (!file) {
+            return apr_pstrcat(cmd->pool, "Invalid SSLMutex flock: path ", 
+                               arg+6, NULL);
+        }
+        mc->nMutexMode  = SSL_MUTEXMODE_USED;
+        mc->nMutexMech = APR_LOCK_FLOCK;
+        mc->szMutexFile = apr_psprintf(mc->pPool, "%s.%lu",
+                                       file, (unsigned long)getpid());
+    }
+#endif
+#if APR_HAS_FCNTL_SERIALIZE
+    else if (strlen(arg) > 6 && strcEQn(arg, "fcntl:", 6)) {
+        const char *file = ap_server_root_relative(cmd->pool, arg+6);
+        if (!file) {
+            return apr_pstrcat(cmd->pool, "Invalid SSLMutex fcntl: path ", 
+                               arg+6, NULL);
+        }
+        mc->nMutexMode  = SSL_MUTEXMODE_USED;
+        mc->nMutexMech = APR_LOCK_FCNTL;
+        mc->szMutexFile = apr_psprintf(mc->pPool, "%s.%lu",
+                                       file, (unsigned long)getpid());
+    }
+#endif
+#if APR_HAS_SYSVSEM_SERIALIZE && !defined(PERCHILD_MPM)
+    else if (strcEQ(arg, "sysvsem")) {
+        mc->nMutexMode  = SSL_MUTEXMODE_USED;
+        mc->nMutexMech = APR_LOCK_SYSVSEM;
+        mc->szMutexFile = NULL; /* APR determines temporary filename */
+    }
+#endif
+#if APR_HAS_POSIXSEM_SERIALIZE
+    else if (strcEQ(arg, "posixsem")) {
+        mc->nMutexMode  = SSL_MUTEXMODE_USED;
+        mc->nMutexMech = APR_LOCK_POSIXSEM;
+        mc->szMutexFile = NULL; /* APR determines temporary filename */
+    }
+#endif
+#if APR_HAS_PROC_PTHREAD_SERIALIZE
+    else if (strcEQ(arg, "pthread")) {
+        mc->nMutexMode  = SSL_MUTEXMODE_USED;
+        mc->nMutexMech = APR_LOCK_PROC_PTHREAD;
+        mc->szMutexFile = NULL; /* APR determines temporary filename */
+    }
+#endif
+#if APR_HAS_FLOCK_SERIALIZE || APR_HAS_FCNTL_SERIALIZE
     else if (strlen(arg) > 5 && strcEQn(arg, "file:", 5)) {
         const char *file = ap_server_root_relative(cmd->pool, arg+5);
         if (!file) {
@@ -390,17 +445,32 @@ const char *ssl_cmd_SSLMutex(cmd_parms *cmd,
                                arg+5, NULL);
         }
         mc->nMutexMode  = SSL_MUTEXMODE_USED;
+#if APR_HAS_FLOCK_SERIALIZE
+        mc->nMutexMech  = APR_LOCK_FLOCK;
+#endif
+#if APR_HAS_FCNTL_SERIALIZE
+        mc->nMutexMech  = APR_LOCK_FCNTL;
+#endif
         mc->szMutexFile =
             apr_psprintf(mc->pPool, "%s.%lu",
                          file, (unsigned long)getpid());
     }
-    else if (strcEQ(arg, "sem") || strcEQ(arg, "yes")) {
+#endif
+#if (APR_HAS_SYSVSEM_SERIALIZE && !defined(PERCHILD_MPM)) || APR_HAS_POSIXSEM_SERIALIZE
+    else if (strcEQ(arg, "sem")) {
         mc->nMutexMode  = SSL_MUTEXMODE_USED;
+#if APR_HAS_SYSVSEM_SERIALIZE && !defined(PERCHILD_MPM)
+        mc->nMutexMech  = APR_LOCK_SYSVSEM;
+#endif
+#if APR_HAS_POSIXSEM_SERIALIZE
+        mc->nMutexMech  = APR_LOCK_POSIXSEM;
+#endif
         mc->szMutexFile = NULL; /* APR determines temporary filename */
     }
+#endif
     else {
         return apr_pstrcat(cmd->pool, "Invalid SSLMutex argument ", 
-                           arg, NULL);
+                           arg, " (", ssl_valid_ssl_mutex_string, ")", NULL);
     }
 
     return NULL;
diff --git a/modules/ssl/ssl_engine_mutex.c b/modules/ssl/ssl_engine_mutex.c
index b407c98474..520f12beec 100644
--- a/modules/ssl/ssl_engine_mutex.c
+++ b/modules/ssl/ssl_engine_mutex.c
@@ -75,9 +75,13 @@ int ssl_mutex_init(server_rec *s, apr_pool_t *p)
 
     if ((rv = apr_global_mutex_create(&mc->pMutex, mc->szMutexFile,
                                 APR_LOCK_DEFAULT, p)) != APR_SUCCESS) {
-        ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
-                     "Cannot create SSLMutex file `%s'",
-                     mc->szMutexFile);
+        if (mc->szMutexFile)
+            ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
+                         "Cannot create SSLMutex with file `%s'",
+                         mc->szMutexFile);
+        else
+            ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
+                         "Cannot create SSLMutex");
         return FALSE;
     }
 
@@ -96,13 +100,22 @@ int ssl_mutex_init(server_rec *s, apr_pool_t *p)
 int ssl_mutex_reinit(server_rec *s, apr_pool_t *p)
 {
     SSLModConfigRec *mc = myModConfig(s);
+    apr_status_t rv;
 
     if (mc->nMutexMode == SSL_MUTEXMODE_NONE)
         return TRUE;
 
-    if (apr_global_mutex_child_init(&mc->pMutex,
-                                    mc->szMutexFile, p) != APR_SUCCESS)
+    if ((rv = apr_global_mutex_child_init(&mc->pMutex,
+                                    mc->szMutexFile, p)) != APR_SUCCESS) {
+        if (mc->szMutexFile)
+            ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
+                         "Cannot reinit SSLMutex with file `%s'",
+                         mc->szMutexFile);
+        else
+            ap_log_error(APLOG_MARK, APLOG_WARNING, rv, s,
+                         "Cannot reinit SSLMutex");
         return FALSE;
+    }
     return TRUE;
 }