From: Kay Sievers <kay@vrfy.org>
Date: Tue, 18 Mar 2014 21:17:22 +0000 (+0100)
Subject: add debug log code
X-Git-Tag: upstream/0.20140325.112233cet~35
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4a3321d3143fbb0156c0233c26702fb6853fcbc4;p=platform%2Fcore%2Fsystem%2Fkdbus-bus.git

add debug log code
---

diff --git a/connection.c b/connection.c
index b3227ef..a226f08 100644
--- a/connection.c
+++ b/connection.c
@@ -702,6 +702,7 @@ static int kdbus_conn_queue_insert(struct kdbus_conn *conn,
 	/* link the message into the receiver's queue */
 	mutex_lock(&conn->lock);
 	kdbus_conn_queue_add(conn, queue);
+	kdbus_pool_log(conn->pool, queue->off, queue->size, "SEND", conn_src ? conn_src->id : 0, conn->id, queue->cookie);
 	mutex_unlock(&conn->lock);
 
 	/* wake up poll() */
@@ -1073,6 +1074,7 @@ int kdbus_cmd_msg_recv(struct kdbus_conn *conn,
 	}
 
 	ret = kdbus_conn_msg_install(conn, queue);
+	kdbus_pool_log(conn->pool, queue->off, queue->size, "RECV", 0 , conn->id, queue->cookie);
 	kdbus_conn_queue_remove(conn, queue);
 	kdbus_conn_queue_cleanup(queue);
 
diff --git a/pool.c b/pool.c
index cbf8ee7..16de369 100644
--- a/pool.c
+++ b/pool.c
@@ -24,6 +24,7 @@
 #include <linux/sizes.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
+#include <linux/ctype.h>
 
 #include "pool.h"
 #include "util.h"
@@ -678,3 +679,45 @@ int kdbus_pool_mmap(const struct kdbus_pool *pool, struct vm_area_struct *vma)
 
 	return pool->f->f_op->mmap(pool->f, vma);
 }
+
+void kdbus_pool_log(const struct kdbus_pool *pool, size_t off, size_t len,
+		    const char *s, u64 src, u64 dst, u64 cookie)
+{
+	struct address_space *mapping = pool->f->f_mapping;
+	struct page *page;
+	char *kaddr;
+	size_t o = off & (PAGE_CACHE_SIZE - 1);
+	char buf[256];
+	unsigned int i;
+
+	page = find_get_page(mapping, off >> PAGE_CACHE_SHIFT);
+	if (!page)
+		return;
+
+	kaddr = kmap(page);
+
+	for (i = 0; i < len && i < sizeof(buf)-1; i++) {
+		char c = kaddr[o + i];
+
+		switch (c) {
+		case '1' ... '9':
+		case 'a' ... 'z':
+		case 'A' ... 'Z':
+		case '-':
+		case '/':
+		case ':':
+			buf[i] = c;
+			break;
+		case '\0':
+			buf[i] = '_';
+			break;
+		default:
+			buf[i] = '.';
+		}
+	}
+	buf[i] = '\0';
+	printk(KERN_INFO "XXX %s %04llu %04llu %08zu %08zu %04llu '%s'\n", s, src, dst, len, off, cookie, buf);
+
+	kunmap(page);
+	put_page(page);
+}
diff --git a/pool.h b/pool.h
index d1df425..e0a1faa 100644
--- a/pool.h
+++ b/pool.h
@@ -31,4 +31,6 @@ int kdbus_pool_move(struct kdbus_pool *dst_pool,
 void kdbus_pool_flush_dcache(const struct kdbus_pool *pool,
 			     size_t off, size_t len);
 int kdbus_pool_mmap(const struct kdbus_pool *pool, struct vm_area_struct *vma);
+void kdbus_pool_log(const struct kdbus_pool *pool, size_t off, size_t len,
+		    const char *s, u64 src, u64 dst, u64 cookie);
 #endif