Btrfs-progs: check, fix false error reports for shared prealloc extents

[platform/upstream/btrfs-progs.git] / kerncompat.h

diff --git a/kerncompat.h b/kerncompat.h
index 8b9a84c..fa96715 100644 (file)
--- a/kerncompat.h
+++ b/kerncompat.h
@@ -68,6 +68,14 @@
 #define ULONG_MAX       (~0UL)
 #endif
 
+#define __token_glue(a,b,c)    ___token_glue(a,b,c)
+#define ___token_glue(a,b,c)   a ## b ## c
+#ifdef DEBUG_BUILD_CHECKS
+#define BUILD_ASSERT(x)                extern int __token_glue(compile_time_assert_,__LINE__,__COUNTER__)[1-2*!(x)] __attribute__((unused))
+#else
+#define BUILD_ASSERT(x)
+#endif
+
 #ifndef BTRFS_DISABLE_BACKTRACE
 #define MAX_BACKTRACE  16
 static inline void print_trace(void)
@@ -78,26 +86,35 @@ static inline void print_trace(void)
        size = backtrace(array, MAX_BACKTRACE);
        backtrace_symbols_fd(array, size, 2);
 }
+#endif
 
-static inline void assert_trace(const char *assertion, const char *filename,
-                             const char *func, unsigned line, int val)
+static inline void warning_trace(const char *assertion, const char *filename,
+                             const char *func, unsigned line, long val)
 {
-       if (val)
+       if (!val)
                return;
-       if (assertion)
-               fprintf(stderr, "%s:%d: %s: Assertion `%s` failed.\n",
-                       filename, line, func, assertion);
-       else
-               fprintf(stderr, "%s:%d: %s: Assertion failed.\n", filename,
-                       line, func);
+       fprintf(stderr,
+               "%s:%d: %s: Warning: assertion `%s` failed, value %ld\n",
+               filename, line, func, assertion, val);
+#ifndef BTRFS_DISABLE_BACKTRACE
        print_trace();
-       exit(1);
+#endif
 }
 
-#define BUG() assert_trace(NULL, __FILE__, __func__, __LINE__, 0)
-#else
-#define BUG() assert(0)
+static inline void bugon_trace(const char *assertion, const char *filename,
+                             const char *func, unsigned line, long val)
+{
+       if (!val)
+               return;
+       fprintf(stderr,
+               "%s:%d: %s: BUG_ON `%s` triggered, value %ld\n",
+               filename, line, func, assertion, val);
+#ifndef BTRFS_DISABLE_BACKTRACE
+       print_trace();
 #endif
+       abort();
+       exit(1);
+}
 
 #ifdef __CHECKER__
 #define __force    __attribute__((force))
@@ -236,11 +253,16 @@ static inline long PTR_ERR(const void *ptr)
        return (long) ptr;
 }
 
-static inline long IS_ERR(const void *ptr)
+static inline int IS_ERR(const void *ptr)
 {
        return IS_ERR_VALUE((unsigned long)ptr);
 }
 
+static inline int IS_ERR_OR_NULL(const void *ptr)
+{
+       return !ptr || IS_ERR(ptr);
+}
+
 /*
  * This looks more complex than it should be. But we need to
  * get the type for the ~ right in round_down (it needs to be
@@ -269,27 +291,39 @@ static inline long IS_ERR(const void *ptr)
 #define vfree(x) free(x)
 
 #ifndef BTRFS_DISABLE_BACKTRACE
-#define BUG_ON(c) assert_trace(#c, __FILE__, __func__, __LINE__, !(c))
-#else
-#define BUG_ON(c) assert(!(c))
-#endif
-
-#define WARN_ON(c) BUG_ON(c)
-
+static inline void assert_trace(const char *assertion, const char *filename,
+                             const char *func, unsigned line, long val)
+{
+       if (val)
+               return;
+       fprintf(stderr,
+               "%s:%d: %s: Assertion `%s` failed, value %ld\n",
+               filename, line, func, assertion, val);
 #ifndef BTRFS_DISABLE_BACKTRACE
-#define        ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (c))
+       print_trace();
+#endif
+       abort();
+       exit(1);
+}
+#define        ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
 #else
 #define ASSERT(c) assert(c)
 #endif
 
+#define BUG_ON(c) bugon_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
+#define BUG() BUG_ON(1)
+#define WARN_ON(c) warning_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
+
 #define container_of(ptr, type, member) ({                      \
         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
                (type *)( (char *)__mptr - offsetof(type,member) );})
+#ifndef __bitwise
 #ifdef __CHECKER__
 #define __bitwise __bitwise__
 #else
 #define __bitwise
-#endif
+#endif /* __CHECKER__ */
+#endif /* __bitwise */
 
 /* Alignment check */
 #define IS_ALIGNED(x, a)                (((x) & ((typeof(x))(a) - 1)) == 0)