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Subject[PATCH 4/7] FS-Cache: Use new core assertion macros
Date
Make FS-Cache use the new core assertion macros in place of its own.

Signed-off-by: David Howells <dhowells@redhat.com>
---
fs/fscache/debug.h | 82 +++++++++++++++++++++++++++++++
fs/fscache/internal.h | 128 +-----------------------------------------------
fs/fscache/operation.c | 3 -
3 files changed, 86 insertions(+), 127 deletions(-)
create mode 100644 fs/fscache/debug.h
diff --git a/fs/fscache/debug.h b/fs/fscache/debug.h
new file mode 100644
index 0000000..fcdbbab
--- /dev/null
+++ b/fs/fscache/debug.h
@@ -0,0 +1,82 @@
+/* Debug tracing
+ *
+ * Copyright (C) 2004-2011 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <linux/printk.h>
+#define ENABLE_ASSERTIONS
+#include <linux/assert.h>
+
+/*
+ * debug tracing
+ */
+#define dbgprintk(FMT, ...) \
+ printk(KERN_DEBUG "[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)
+
+#define kenter(FMT, ...) dbgprintk("==> %s("FMT")", __func__, ##__VA_ARGS__)
+#define kleave(FMT, ...) dbgprintk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
+#define kdebug(FMT, ...) dbgprintk(FMT, ##__VA_ARGS__)
+
+#define kjournal(FMT, ...) no_printk(FMT, ##__VA_ARGS__)
+
+#ifdef __KDEBUG
+#define _enter(FMT, ...) kenter(FMT, ##__VA_ARGS__)
+#define _leave(FMT, ...) kleave(FMT, ##__VA_ARGS__)
+#define _debug(FMT, ...) kdebug(FMT, ##__VA_ARGS__)
+
+#elif defined(CONFIG_FSCACHE_DEBUG)
+#define _enter(FMT, ...) \
+do { \
+ if (__do_kdebug(ENTER)) \
+ kenter(FMT, ##__VA_ARGS__); \
+} while (0)
+
+#define _leave(FMT, ...) \
+do { \
+ if (__do_kdebug(LEAVE)) \
+ kleave(FMT, ##__VA_ARGS__); \
+} while (0)
+
+#define _debug(FMT, ...) \
+do { \
+ if (__do_kdebug(DEBUG)) \
+ kdebug(FMT, ##__VA_ARGS__); \
+} while (0)
+
+#else
+#define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__)
+#define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
+#define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__)
+#endif
+
+/*
+ * determine whether a particular optional debugging point should be logged
+ * - we need to go through three steps to persuade cpp to correctly join the
+ * shorthand in FSCACHE_DEBUG_LEVEL with its prefix
+ */
+#define ____do_kdebug(LEVEL, POINT) \
+ unlikely((fscache_debug & \
+ (FSCACHE_POINT_##POINT << (FSCACHE_DEBUG_ ## LEVEL * 3))))
+#define ___do_kdebug(LEVEL, POINT) \
+ ____do_kdebug(LEVEL, POINT)
+#define __do_kdebug(POINT) \
+ ___do_kdebug(FSCACHE_DEBUG_LEVEL, POINT)
+
+#define FSCACHE_DEBUG_CACHE 0
+#define FSCACHE_DEBUG_COOKIE 1
+#define FSCACHE_DEBUG_PAGE 2
+#define FSCACHE_DEBUG_OPERATION 3
+
+#define FSCACHE_POINT_ENTER 1
+#define FSCACHE_POINT_LEAVE 2
+#define FSCACHE_POINT_DEBUG 4
+
+#ifndef FSCACHE_DEBUG_LEVEL
+#define FSCACHE_DEBUG_LEVEL CACHE
+#endif
diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
index dcb3e1d..4c1a1ba 100644
--- a/fs/fscache/internal.h
+++ b/fs/fscache/internal.h
@@ -24,6 +24,7 @@

#include <linux/fscache-cache.h>
#include <linux/sched.h>
+#include "debug.h"

#define FSCACHE_MIN_THREADS 4
#define FSCACHE_MAX_THREADS 32
@@ -288,7 +289,7 @@ extern const struct file_operations fscache_stats_fops;
static inline void fscache_raise_event(struct fscache_object *object,
unsigned event)
{
- BUG_ON(event >= NR_FSCACHE_OBJECT_EVENTS);
+ ASSERTCMP(event, <, NR_FSCACHE_OBJECT_EVENTS);
if (!test_and_set_bit(event, &object->events) &&
test_bit(event, &object->event_mask))
fscache_enqueue_object(object);
@@ -299,7 +300,7 @@ static inline void fscache_raise_event(struct fscache_object *object,
*/
static inline void fscache_cookie_put(struct fscache_cookie *cookie)
{
- BUG_ON(atomic_read(&cookie->usage) <= 0);
+ ASSERTCMP(atomic_read(&cookie->usage), >, 0);
if (atomic_dec_and_test(&cookie->usage))
__fscache_cookie_put(cookie);
}
@@ -324,126 +325,3 @@ void fscache_put_context(struct fscache_cookie *cookie, void *context)
if (cookie->def->put_context)
cookie->def->put_context(cookie->netfs_data, context);
}
-
-/*****************************************************************************/
-/*
- * debug tracing
- */
-#define dbgprintk(FMT, ...) \
- printk(KERN_DEBUG "[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)
-
-#define kenter(FMT, ...) dbgprintk("==> %s("FMT")", __func__, ##__VA_ARGS__)
-#define kleave(FMT, ...) dbgprintk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
-#define kdebug(FMT, ...) dbgprintk(FMT, ##__VA_ARGS__)
-
-#define kjournal(FMT, ...) no_printk(FMT, ##__VA_ARGS__)
-
-#ifdef __KDEBUG
-#define _enter(FMT, ...) kenter(FMT, ##__VA_ARGS__)
-#define _leave(FMT, ...) kleave(FMT, ##__VA_ARGS__)
-#define _debug(FMT, ...) kdebug(FMT, ##__VA_ARGS__)
-
-#elif defined(CONFIG_FSCACHE_DEBUG)
-#define _enter(FMT, ...) \
-do { \
- if (__do_kdebug(ENTER)) \
- kenter(FMT, ##__VA_ARGS__); \
-} while (0)
-
-#define _leave(FMT, ...) \
-do { \
- if (__do_kdebug(LEAVE)) \
- kleave(FMT, ##__VA_ARGS__); \
-} while (0)
-
-#define _debug(FMT, ...) \
-do { \
- if (__do_kdebug(DEBUG)) \
- kdebug(FMT, ##__VA_ARGS__); \
-} while (0)
-
-#else
-#define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__)
-#define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
-#define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__)
-#endif
-
-/*
- * determine whether a particular optional debugging point should be logged
- * - we need to go through three steps to persuade cpp to correctly join the
- * shorthand in FSCACHE_DEBUG_LEVEL with its prefix
- */
-#define ____do_kdebug(LEVEL, POINT) \
- unlikely((fscache_debug & \
- (FSCACHE_POINT_##POINT << (FSCACHE_DEBUG_ ## LEVEL * 3))))
-#define ___do_kdebug(LEVEL, POINT) \
- ____do_kdebug(LEVEL, POINT)
-#define __do_kdebug(POINT) \
- ___do_kdebug(FSCACHE_DEBUG_LEVEL, POINT)
-
-#define FSCACHE_DEBUG_CACHE 0
-#define FSCACHE_DEBUG_COOKIE 1
-#define FSCACHE_DEBUG_PAGE 2
-#define FSCACHE_DEBUG_OPERATION 3
-
-#define FSCACHE_POINT_ENTER 1
-#define FSCACHE_POINT_LEAVE 2
-#define FSCACHE_POINT_DEBUG 4
-
-#ifndef FSCACHE_DEBUG_LEVEL
-#define FSCACHE_DEBUG_LEVEL CACHE
-#endif
-
-/*
- * assertions
- */
-#if 1 /* defined(__KDEBUGALL) */
-
-#define ASSERT(X) \
-do { \
- if (unlikely(!(X))) { \
- printk(KERN_ERR "\n"); \
- printk(KERN_ERR "FS-Cache: Assertion failed\n"); \
- BUG(); \
- } \
-} while (0)
-
-#define ASSERTCMP(X, OP, Y) \
-do { \
- if (unlikely(!((X) OP (Y)))) { \
- printk(KERN_ERR "\n"); \
- printk(KERN_ERR "FS-Cache: Assertion failed\n"); \
- printk(KERN_ERR "%lx " #OP " %lx is false\n", \
- (unsigned long)(X), (unsigned long)(Y)); \
- BUG(); \
- } \
-} while (0)
-
-#define ASSERTIF(C, X) \
-do { \
- if (unlikely((C) && !(X))) { \
- printk(KERN_ERR "\n"); \
- printk(KERN_ERR "FS-Cache: Assertion failed\n"); \
- BUG(); \
- } \
-} while (0)
-
-#define ASSERTIFCMP(C, X, OP, Y) \
-do { \
- if (unlikely((C) && !((X) OP (Y)))) { \
- printk(KERN_ERR "\n"); \
- printk(KERN_ERR "FS-Cache: Assertion failed\n"); \
- printk(KERN_ERR "%lx " #OP " %lx is false\n", \
- (unsigned long)(X), (unsigned long)(Y)); \
- BUG(); \
- } \
-} while (0)
-
-#else
-
-#define ASSERT(X) do {} while (0)
-#define ASSERTCMP(X, OP, Y) do {} while (0)
-#define ASSERTIF(C, X) do {} while (0)
-#define ASSERTIFCMP(C, X, OP, Y) do {} while (0)
-
-#endif /* assert or not */
diff --git a/fs/fscache/operation.c b/fs/fscache/operation.c
index cafba83..be15b09 100644
--- a/fs/fscache/operation.c
+++ b/fs/fscache/operation.c
@@ -429,8 +429,7 @@ void fscache_put_operation(struct fscache_operation *op)
printk("FS-Cache: Asserting on %s operation\n",
fscache_op_names[op->name]);

- ASSERTIFCMP(op->state != FSCACHE_OP_ST_COMPLETE,
- op->state, ==, FSCACHE_OP_ST_CANCELLED);
+ ASSERTRANGE(FSCACHE_OP_ST_COMPLETE, <=, op->state, <=, FSCACHE_OP_ST_CANCELLED);
op->state = FSCACHE_OP_ST_DEAD;

fscache_stat(&fscache_n_op_release);


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