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9p: rework client code to use new protocol support functions

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Now that the new protocol functions are in place, this patch switches
the client code to using the new support code.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Eric Van Hensbergen
2008-10-16 08:30:07 -05:00
parent cb198131b0
commit 51a87c552d
12 changed files with 617 additions and 550 deletions
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85
net/9p/protocol.c
View File

@@ -27,6 +27,7 @@
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/uaccess.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "protocol.h"
@@ -51,6 +52,38 @@
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)
{
int i, n;
u8 *data = pdu->sdata;
int datalen = pdu->size;
char buf[255];
int buflen = 255;
i = n = 0;
if (datalen > (buflen-16))
datalen = buflen-16;
while (i < datalen) {
n += scnprintf(buf + n, buflen - n, "%02x ", data[i]);
if (i%4 == 3)
n += scnprintf(buf + n, buflen - n, " ");
if (i%32 == 31)
n += scnprintf(buf + n, buflen - n, "\n");
i++;
}
n += scnprintf(buf + n, buflen - n, "\n");
if (way)
printk(KERN_NOTICE "[[(%d)[ %s\n", datalen, buf);
else
printk(KERN_NOTICE "]](%d)] %s\n", datalen, buf);
}
EXPORT_SYMBOL(p9pdu_dump);
void p9stat_free(struct p9_wstat *stbuf)
{
kfree(stbuf->name);
@@ -77,6 +110,18 @@ static size_t pdu_write(struct p9_fcall *pdu, const void *data, size_t size)
return size - len;
}
static size_t
pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size)
{
size_t len = MIN(pdu->capacity - pdu->size, size);
int err = copy_from_user(&pdu->sdata[pdu->size], udata, len);
if (err)
printk(KERN_WARNING "pdu_write_u returning: %d\n", err);
pdu->size += len;
return size - len;
}
/*
b - int8_t
w - int16_t
@@ -174,7 +219,6 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
stbuf->extension = NULL;
stbuf->n_uid = stbuf->n_gid = stbuf->n_muid =
-1;
errcode =
p9pdu_readf(pdu, optional,
"wwdQdddqssss?sddd",
@@ -332,7 +376,6 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
case 's':{
const char *ptr = va_arg(ap, const char *);
int16_t len = 0;
if (ptr)
len = MIN(strlen(ptr), USHORT_MAX);
@@ -356,7 +399,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
p9pdu_writef(pdu, optional,
"wwdQdddqssss?sddd",
stbuf->size, stbuf->type,
stbuf->dev, stbuf->qid,
stbuf->dev, &stbuf->qid,
stbuf->mode, stbuf->atime,
stbuf->mtime, stbuf->length,
stbuf->name, stbuf->uid,
@@ -374,6 +417,16 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
errcode = -EFAULT;
}
break;
case 'U':{
int32_t count = va_arg(ap, int32_t);
const char __user *udata =
va_arg(ap, const void *);
errcode =
p9pdu_writef(pdu, optional, "d", count);
if (!errcode && pdu_write_u(pdu, udata, count))
errcode = -EFAULT;
}
break;
case 'T':{
int16_t nwname = va_arg(ap, int);
const char **wnames = va_arg(ap, const char **);
@@ -455,3 +508,29 @@ p9pdu_writef(struct p9_fcall *pdu, int optional, const char *fmt, ...)
return ret;
}
int p9pdu_prepare(struct p9_fcall *pdu, int16_t tag, int8_t type)
{
return p9pdu_writef(pdu, 0, "dbw", 0, type, tag);
}
int p9pdu_finalize(struct p9_fcall *pdu)
{
int size = pdu->size;
int err;
pdu->size = 0;
err = p9pdu_writef(pdu, 0, "d", size);
pdu->size = size;
if (PACKET_DEBUG)
p9pdu_dump(0, pdu);
return err;
}
void p9pdu_reset(struct p9_fcall *pdu)
{
pdu->offset = 0;
pdu->size = 0;
}