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9p: fix endian issues [attempt 3]

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When the changes were done to the protocol last release, some endian
bugs crept in.  This patch fixes those endian problems and has been
verified to run on 32/64 bit and x86/ppc architectures.

This version of the patch incorporates the correct annotations
for endian variables.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Van Hensbergen 2009-02-06 22:07:41 -08:00 committed by David S. Miller
parent b4bd07c20b
commit beeebc92ee
1 changed files with 13 additions and 9 deletions
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22
net/9p/protocol.c
View file

@ -29,6 +29,7 @@
#include <linux/errno.h>
#include <linux/uaccess.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "protocol.h"
@ -160,29 +161,32 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
break;
case 'w':{
int16_t *val = va_arg(ap, int16_t *);
if (pdu_read(pdu, val, sizeof(*val))) {
__le16 le_val;
if (pdu_read(pdu, &le_val, sizeof(le_val))) {
errcode = -EFAULT;
break;
}
*val = cpu_to_le16(*val);
*val = le16_to_cpu(le_val);
}
break;
case 'd':{
int32_t *val = va_arg(ap, int32_t *);
if (pdu_read(pdu, val, sizeof(*val))) {
__le32 le_val;
if (pdu_read(pdu, &le_val, sizeof(le_val))) {
errcode = -EFAULT;
break;
}
*val = cpu_to_le32(*val);
*val = le32_to_cpu(le_val);
}
break;
case 'q':{
int64_t *val = va_arg(ap, int64_t *);
if (pdu_read(pdu, val, sizeof(*val))) {
__le64 le_val;
if (pdu_read(pdu, &le_val, sizeof(le_val))) {
errcode = -EFAULT;
break;
}
*val = cpu_to_le64(*val);
*val = le64_to_cpu(le_val);
}
break;
case 's':{
@ -362,19 +366,19 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
}
break;
case 'w':{
int16_t val = va_arg(ap, int);
__le16 val = cpu_to_le16(va_arg(ap, int));
if (pdu_write(pdu, &val, sizeof(val)))
errcode = -EFAULT;
}
break;
case 'd':{
int32_t val = va_arg(ap, int32_t);
__le32 val = cpu_to_le32(va_arg(ap, int32_t));
if (pdu_write(pdu, &val, sizeof(val)))
errcode = -EFAULT;
}
break;
case 'q':{
int64_t val = va_arg(ap, int64_t);
__le64 val = cpu_to_le64(va_arg(ap, int64_t));
if (pdu_write(pdu, &val, sizeof(val)))
errcode = -EFAULT;
}