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Diffstat (limited to 'net/9p/protocol.c')
-rw-r--r--net/9p/protocol.c75
1 files changed, 42 insertions, 33 deletions
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index fc70147c771e..e7541d5b0118 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/slab.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <net/9p/9p.h>
@@ -52,7 +53,7 @@
#endif
static int
-p9pdu_writef(struct p9_fcall *pdu, int optional, const char *fmt, ...);
+p9pdu_writef(struct p9_fcall *pdu, int proto_version, const char *fmt, ...);
#ifdef CONFIG_NET_9P_DEBUG
void
@@ -144,7 +145,8 @@ pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size)
*/
static int
-p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
+p9pdu_vreadf(struct p9_fcall *pdu, int proto_version, const char *fmt,
+ va_list ap)
{
const char *ptr;
int errcode = 0;
@@ -194,7 +196,8 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
int16_t len;
int size;
- errcode = p9pdu_readf(pdu, optional, "w", &len);
+ errcode = p9pdu_readf(pdu, proto_version,
+ "w", &len);
if (errcode)
break;
@@ -217,7 +220,7 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
struct p9_qid *qid =
va_arg(ap, struct p9_qid *);
- errcode = p9pdu_readf(pdu, optional, "bdq",
+ errcode = p9pdu_readf(pdu, proto_version, "bdq",
&qid->type, &qid->version,
&qid->path);
}
@@ -230,7 +233,7 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
stbuf->n_uid = stbuf->n_gid = stbuf->n_muid =
-1;
errcode =
- p9pdu_readf(pdu, optional,
+ p9pdu_readf(pdu, proto_version,
"wwdQdddqssss?sddd",
&stbuf->size, &stbuf->type,
&stbuf->dev, &stbuf->qid,
@@ -250,7 +253,7 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
void **data = va_arg(ap, void **);
errcode =
- p9pdu_readf(pdu, optional, "d", count);
+ p9pdu_readf(pdu, proto_version, "d", count);
if (!errcode) {
*count =
MIN(*count,
@@ -263,8 +266,8 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
int16_t *nwname = va_arg(ap, int16_t *);
char ***wnames = va_arg(ap, char ***);
- errcode =
- p9pdu_readf(pdu, optional, "w", nwname);
+ errcode = p9pdu_readf(pdu, proto_version,
+ "w", nwname);
if (!errcode) {
*wnames =
kmalloc(sizeof(char *) * *nwname,
@@ -278,7 +281,8 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
for (i = 0; i < *nwname; i++) {
errcode =
- p9pdu_readf(pdu, optional,
+ p9pdu_readf(pdu,
+ proto_version,
"s",
&(*wnames)[i]);
if (errcode)
@@ -306,7 +310,7 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
*wqids = NULL;
errcode =
- p9pdu_readf(pdu, optional, "w", nwqid);
+ p9pdu_readf(pdu, proto_version, "w", nwqid);
if (!errcode) {
*wqids =
kmalloc(*nwqid *
@@ -321,7 +325,8 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
for (i = 0; i < *nwqid; i++) {
errcode =
- p9pdu_readf(pdu, optional,
+ p9pdu_readf(pdu,
+ proto_version,
"Q",
&(*wqids)[i]);
if (errcode)
@@ -336,7 +341,7 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
}
break;
case '?':
- if (!optional)
+ if (proto_version != p9_proto_2000u)
return 0;
break;
default:
@@ -352,7 +357,8 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
}
int
-p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
+p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
+ va_list ap)
{
const char *ptr;
int errcode = 0;
@@ -389,7 +395,8 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
if (sptr)
len = MIN(strlen(sptr), USHORT_MAX);
- errcode = p9pdu_writef(pdu, optional, "w", len);
+ errcode = p9pdu_writef(pdu, proto_version,
+ "w", len);
if (!errcode && pdu_write(pdu, sptr, len))
errcode = -EFAULT;
}
@@ -398,7 +405,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
const struct p9_qid *qid =
va_arg(ap, const struct p9_qid *);
errcode =
- p9pdu_writef(pdu, optional, "bdq",
+ p9pdu_writef(pdu, proto_version, "bdq",
qid->type, qid->version,
qid->path);
} break;
@@ -406,7 +413,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
const struct p9_wstat *stbuf =
va_arg(ap, const struct p9_wstat *);
errcode =
- p9pdu_writef(pdu, optional,
+ p9pdu_writef(pdu, proto_version,
"wwdQdddqssss?sddd",
stbuf->size, stbuf->type,
stbuf->dev, &stbuf->qid,
@@ -421,8 +428,8 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
int32_t count = va_arg(ap, int32_t);
const void *data = va_arg(ap, const void *);
- errcode =
- p9pdu_writef(pdu, optional, "d", count);
+ errcode = p9pdu_writef(pdu, proto_version, "d",
+ count);
if (!errcode && pdu_write(pdu, data, count))
errcode = -EFAULT;
}
@@ -431,8 +438,8 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
int32_t count = va_arg(ap, int32_t);
const char __user *udata =
va_arg(ap, const void __user *);
- errcode =
- p9pdu_writef(pdu, optional, "d", count);
+ errcode = p9pdu_writef(pdu, proto_version, "d",
+ count);
if (!errcode && pdu_write_u(pdu, udata, count))
errcode = -EFAULT;
}
@@ -441,14 +448,15 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
int16_t nwname = va_arg(ap, int);
const char **wnames = va_arg(ap, const char **);
- errcode =
- p9pdu_writef(pdu, optional, "w", nwname);
+ errcode = p9pdu_writef(pdu, proto_version, "w",
+ nwname);
if (!errcode) {
int i;
for (i = 0; i < nwname; i++) {
errcode =
- p9pdu_writef(pdu, optional,
+ p9pdu_writef(pdu,
+ proto_version,
"s",
wnames[i]);
if (errcode)
@@ -462,14 +470,15 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
struct p9_qid *wqids =
va_arg(ap, struct p9_qid *);
- errcode =
- p9pdu_writef(pdu, optional, "w", nwqid);
+ errcode = p9pdu_writef(pdu, proto_version, "w",
+ nwqid);
if (!errcode) {
int i;
for (i = 0; i < nwqid; i++) {
errcode =
- p9pdu_writef(pdu, optional,
+ p9pdu_writef(pdu,
+ proto_version,
"Q",
&wqids[i]);
if (errcode)
@@ -479,7 +488,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
}
break;
case '?':
- if (!optional)
+ if (proto_version != p9_proto_2000u)
return 0;
break;
default:
@@ -494,32 +503,32 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
return errcode;
}
-int p9pdu_readf(struct p9_fcall *pdu, int optional, const char *fmt, ...)
+int p9pdu_readf(struct p9_fcall *pdu, int proto_version, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
- ret = p9pdu_vreadf(pdu, optional, fmt, ap);
+ ret = p9pdu_vreadf(pdu, proto_version, fmt, ap);
va_end(ap);
return ret;
}
static int
-p9pdu_writef(struct p9_fcall *pdu, int optional, const char *fmt, ...)
+p9pdu_writef(struct p9_fcall *pdu, int proto_version, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
- ret = p9pdu_vwritef(pdu, optional, fmt, ap);
+ ret = p9pdu_vwritef(pdu, proto_version, fmt, ap);
va_end(ap);
return ret;
}
-int p9stat_read(char *buf, int len, struct p9_wstat *st, int dotu)
+int p9stat_read(char *buf, int len, struct p9_wstat *st, int proto_version)
{
struct p9_fcall fake_pdu;
int ret;
@@ -529,7 +538,7 @@ int p9stat_read(char *buf, int len, struct p9_wstat *st, int dotu)
fake_pdu.sdata = buf;
fake_pdu.offset = 0;
- ret = p9pdu_readf(&fake_pdu, dotu, "S", st);
+ ret = p9pdu_readf(&fake_pdu, proto_version, "S", st);
if (ret) {
P9_DPRINTK(P9_DEBUG_9P, "<<< p9stat_read failed: %d\n", ret);
p9pdu_dump(1, &fake_pdu);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-19 01:26:37 +0300