9p: Improve debug support
The new debug support lacks some of the information that the previous fcprint
code provided -- this patch focuses on better presentation of debug data along
with more helpful debug along error paths.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index 92cb60b..84fa2127 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -28,6 +28,7 @@
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/uaccess.h>
+#include <linux/sched.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "protocol.h"
@@ -52,8 +53,6 @@
static int
p9pdu_writef(struct p9_fcall *pdu, int optional, const char *fmt, ...);
-#define PACKET_DEBUG 0
-
void
p9pdu_dump(int way, struct p9_fcall *pdu)
{
@@ -78,9 +77,9 @@
n += scnprintf(buf + n, buflen - n, "\n");
if (way)
- printk(KERN_NOTICE "[[(%d)[ %s\n", datalen, buf);
+ P9_DPRINTK(P9_DEBUG_PKT, "[[[(%d) %s\n", datalen, buf);
else
- printk(KERN_NOTICE "]](%d)] %s\n", datalen, buf);
+ P9_DPRINTK(P9_DEBUG_PKT, "]]](%d) %s\n", datalen, buf);
}
EXPORT_SYMBOL(p9pdu_dump);
@@ -512,13 +511,20 @@
int p9stat_read(char *buf, int len, struct p9_wstat *st, int dotu)
{
struct p9_fcall fake_pdu;
+ int ret;
fake_pdu.size = len;
fake_pdu.capacity = len;
fake_pdu.sdata = buf;
fake_pdu.offset = 0;
- return p9pdu_readf(&fake_pdu, dotu, "S", st);
+ ret = p9pdu_readf(&fake_pdu, dotu, "S", st);
+ if (ret) {
+ P9_DPRINTK(P9_DEBUG_9P, "<<< p9stat_read failed: %d\n", ret);
+ p9pdu_dump(1, &fake_pdu);
+ }
+
+ return ret;
}
EXPORT_SYMBOL(p9stat_read);
@@ -536,9 +542,12 @@
err = p9pdu_writef(pdu, 0, "d", size);
pdu->size = size;
- if (PACKET_DEBUG)
+ if ((p9_debug_level & P9_DEBUG_PKT) == P9_DEBUG_PKT)
p9pdu_dump(0, pdu);
+ P9_DPRINTK(P9_DEBUG_9P, ">>> size=%d type: %d tag: %d\n", pdu->size,
+ pdu->id, pdu->tag);
+
return err;
}
