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9p: Improve debug support

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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>
This commit is contained in:
Eric Van Hensbergen 2008-10-17 16:20:07 -05:00
parent 02da398b95
commit e7f4b8f1a5
3 changed files with 72 additions and 29 deletions
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21
net/9p/protocol.c
View file

@ -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 @@ p9pdu_dump(int way, struct p9_fcall *pdu)
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 @@ p9pdu_writef(struct p9_fcall *pdu, int optional, const char *fmt, ...)
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 @@ int p9pdu_finalize(struct p9_fcall *pdu)
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;
}