LU-1855 build: fix 'out-of-bounds access' errors

[fs/lustre-release.git] / libcfs / libcfs / user-prim.c

diff --git a/libcfs/libcfs/user-prim.c b/libcfs/libcfs/user-prim.c
index ee787e8..0cc1e3d 100644 (file)
--- a/libcfs/libcfs/user-prim.c
+++ b/libcfs/libcfs/user-prim.c
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -26,8 +24,10 @@
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Whamcloud, Inc.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -46,6 +46,7 @@
 
 #ifndef __KERNEL__
 
+#include <string.h>
 #include <libcfs/libcfs.h>
 
 /*
@@ -80,6 +81,11 @@ void cfs_waitq_add_exclusive(struct cfs_waitq *waitq, struct cfs_waitlink *link)
         (void)link;
 }
 
+void cfs_waitq_add_exclusive_head(struct cfs_waitq *waitq, struct cfs_waitlink *link)
+{
+        cfs_waitq_add_exclusive(waitq, link);
+}
+
 void cfs_waitq_del(struct cfs_waitq *waitq, struct cfs_waitlink *link)
 {
         LASSERT(waitq != NULL);
@@ -117,6 +123,9 @@ void cfs_waitq_wait(struct cfs_waitlink *link, cfs_task_state_t state)
 {
         LASSERT(link != NULL);
         (void)link;
+
+        /* well, wait for something to happen */
+        cfs_call_wait_handler(0);
 }
 
 int64_t cfs_waitq_timedwait(struct cfs_waitlink *link, cfs_task_state_t state,
@@ -124,10 +133,11 @@ int64_t cfs_waitq_timedwait(struct cfs_waitlink *link, cfs_task_state_t state,
 {
         LASSERT(link != NULL);
         (void)link;
+        cfs_call_wait_handler(timeout);
         return 0;
 }
 
-void cfs_schedule_timeout(cfs_task_state_t state, int64_t timeout)
+void cfs_schedule_timeout_and_set_state(cfs_task_state_t state, int64_t timeout)
 {
         cfs_waitlink_t    l;
         /* sleep(timeout) here instead? */
@@ -212,7 +222,8 @@ static void *cfs_thread_helper(void *data)
         (void)f(arg);
         return NULL;
 }
-int cfs_create_thread(cfs_thread_t func, void *arg)
+
+int cfs_create_thread(cfs_thread_t func, void *arg, unsigned long flags)
 {
         pthread_t tid;
         pthread_attr_t tattr;
@@ -238,6 +249,64 @@ uid_t cfs_curproc_uid(void)
         return getuid();
 }
 
+gid_t cfs_curproc_gid(void)
+{
+        return getgid();
+}
+
+uid_t cfs_curproc_fsuid(void)
+{
+        return getuid();
+}
+
+gid_t cfs_curproc_fsgid(void)
+{
+        return getgid();
+}
+
+#ifndef HAVE_STRLCPY /* not in glibc for RHEL 5.x, remove when obsolete */
+size_t strlcpy(char *tgt, const char *src, size_t tgt_len)
+{
+       int src_len = strlen(src);
+
+       strncpy(tgt, src, tgt_len - 1);
+       tgt[tgt_len - 1] = '\0';
+
+       return src_len + 1;
+}
+#endif
+
+#ifndef HAVE_STRLCAT /* not in glibc for RHEL 5.x, remove when obsolete */
+size_t strlcat(char *tgt, const char *src, size_t size)
+{
+       size_t tgt_len = strlen(tgt);
+
+       if (size > tgt_len) {
+               strncat(tgt, src, size - tgt_len - 1);
+               tgt[size - 1] = '\0';
+       }
+
+       return tgt_len + strlen(src);
+}
+#endif
+
+/* Read the environment variable of current process specified by @key. */
+int cfs_get_environ(const char *key, char *value, int *val_len)
+{
+       char *entry;
+       int len;
+
+       entry = getenv(key);
+       if (entry == NULL)
+               return -ENOENT;
+
+       len = strlcpy(value, entry, *val_len);
+       if (len >= *val_len)
+               return -EOVERFLOW;
+
+       return 0;
+}
+
 void cfs_enter_debugger(void)
 {
         /*
@@ -257,24 +326,39 @@ int cfs_daemonize_ctxt(char *str)
 
 cfs_sigset_t cfs_block_allsigs(void)
 {
-        cfs_sigset_t   all;
-        cfs_sigset_t   old;
-        int            rc;
+       cfs_sigset_t   all;
+       cfs_sigset_t   old;
+       int            rc;
 
-        sigfillset(&all);
-        rc = sigprocmask(SIG_SETMASK, &all, &old);
-        LASSERT(rc == 0);
+       sigfillset(&all);
+       rc = sigprocmask(SIG_BLOCK, &all, &old);
+       LASSERT(rc == 0);
 
-        return old;
+       return old;
 }
 
-cfs_sigset_t cfs_block_sigs(cfs_sigset_t blocks)
+cfs_sigset_t cfs_block_sigs(unsigned long sigs)
 {
-        cfs_sigset_t   old;
-        int   rc;
+       cfs_sigset_t   old;
+       cfs_sigset_t   blocks = { { sigs } }; /* kludge */
+       int   rc;
 
-        rc = sigprocmask(SIG_SETMASK, &blocks, &old);
-        LASSERT (rc == 0);
+       rc = sigprocmask(SIG_BLOCK, &blocks, &old);
+       LASSERT (rc == 0);
+
+       return old;
+}
+
+/* Block all signals except for the @sigs. It's only used in
+ * Linux kernel, just a dummy here. */
+cfs_sigset_t cfs_block_sigsinv(unsigned long sigs)
+{
+        cfs_sigset_t old;
+        int rc;
+
+        /* Return old blocked sigs */
+        rc = sigprocmask(SIG_SETMASK, NULL, &old);
+        LASSERT(rc == 0);
 
         return old;
 }
@@ -338,10 +422,10 @@ void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no)
 /* __linux__ */
 #endif
 
-void lbug_with_loc(const char *file, const char *func, const int line)
+void lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
 {
         /* No libcfs_catastrophe in userspace! */
-        libcfs_debug_msg(NULL, 0, D_EMERG, file, func, line, "LBUG\n");
+        libcfs_debug_msg(msgdata, "LBUG\n");
         abort();
 }