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9P2010.L handshake: Remove "dotu" variable 

Removes 'dotu' variable and make everything dependent
on 'proto_version' field.

Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Sripathi Kodi 2010-03-05 18:50:14 +00:00 committed by Eric Van Hensbergen
parent 0fb80abd91
commit 342fee1d5c
6 changed files with 87 additions and 65 deletions
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2
fs/9p/v9fs.c
View File

@ -262,7 +262,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
goto error;
}
if (!v9ses->clnt->dotu)
if (!p9_is_proto_dotu(v9ses->clnt))
v9ses->flags &= ~V9FS_PROTO_2000U;
v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ;

2
fs/9p/vfs_dir.c
View File

@ -135,7 +135,7 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
while (rdir->head < rdir->tail) {
err = p9stat_read(rdir->buf + rdir->head,
buflen - rdir->head, &st,
fid->clnt->dotu);
fid->clnt->proto_version);
if (err) {
P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err);
err = -EIO;

3
include/net/9p/client.h
View File

@ -151,7 +151,6 @@ struct p9_req_t {
struct p9_client {
spinlock_t lock; /* protect client structure */
int msize;
unsigned char dotu;
unsigned char proto_version;
struct p9_trans_module *trans_mod;
enum p9_trans_status status;
@ -224,5 +223,7 @@ int p9_parse_header(struct p9_fcall *, int32_t *, int8_t *, int16_t *, int);
int p9stat_read(char *, int, struct p9_wstat *, int);
void p9stat_free(struct p9_wstat *);
int p9_is_proto_dotu(struct p9_client *clnt);
int p9_is_proto_dotl(struct p9_client *clnt);
#endif /* NET_9P_CLIENT_H */

65
net/9p/client.c
View File

@ -58,6 +58,18 @@ static const match_table_t tokens = {
{Opt_err, NULL},
};
inline int p9_is_proto_dotl(struct p9_client *clnt)
{
return (clnt->proto_version == p9_proto_2010L);
}
EXPORT_SYMBOL(p9_is_proto_dotl);
inline int p9_is_proto_dotu(struct p9_client *clnt)
{
return (clnt->proto_version == p9_proto_2000u);
}
EXPORT_SYMBOL(p9_is_proto_dotu);
/* Interpret mount option for protocol version */
static unsigned char get_protocol_version(const substring_t *name)
{
@ -97,7 +109,7 @@ static int parse_opts(char *opts, struct p9_client *clnt)
int option;
int ret = 0;
clnt->dotu = 1;
clnt->proto_version = p9_proto_2000u;
clnt->msize = 8192;
if (!opts)
@ -140,7 +152,7 @@ static int parse_opts(char *opts, struct p9_client *clnt)
}
break;
case Opt_legacy:
clnt->dotu = 0;
clnt->proto_version = p9_proto_legacy;
break;
case Opt_version:
ret = get_protocol_version(&args[0]);
@ -438,14 +450,15 @@ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
int ecode;
char *ename;
err = p9pdu_readf(req->rc, c->dotu, "s?d", &ename, &ecode);
err = p9pdu_readf(req->rc, c->proto_version, "s?d",
&ename, &ecode);
if (err) {
P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n",
err);
return err;
}
if (c->dotu)
if (p9_is_proto_dotu(c))
err = -ecode;
if (!err || !IS_ERR_VALUE(err))
@ -543,7 +556,7 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
/* marshall the data */
p9pdu_prepare(req->tc, tag, type);
va_start(ap, fmt);
err = p9pdu_vwritef(req->tc, c->dotu, fmt, ap);
err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap);
va_end(ap);
p9pdu_finalize(req->tc);
@ -655,14 +668,14 @@ int p9_client_version(struct p9_client *c)
char *version;
int msize;
P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d extended %d\n",
c->msize, c->dotu);
P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n",
c->msize, c->proto_version);
req = p9_client_rpc(c, P9_TVERSION, "ds", c->msize,
c->dotu ? "9P2000.u" : "9P2000");
p9_is_proto_dotu(c) ? "9P2000.u" : "9P2000");
if (IS_ERR(req))
return PTR_ERR(req);
err = p9pdu_readf(req->rc, c->dotu, "ds", &msize, &version);
err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version);
if (err) {
P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
p9pdu_dump(1, req->rc);
@ -670,10 +683,10 @@ int p9_client_version(struct p9_client *c)
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version);
if (!memcmp(version, "9P2000.u", 8))
c->dotu = 1;
else if (!memcmp(version, "9P2000", 6))
c->dotu = 0;
if (!strncmp(version, "9P2000.u", 8))
c->proto_version = p9_proto_2000u;
else if (!strncmp(version, "9P2000", 6))
c->proto_version = p9_proto_legacy;
else {
err = -EREMOTEIO;
goto error;
@ -728,8 +741,8 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
goto put_trans;
}
P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d dotu %d\n",
clnt, clnt->trans_mod, clnt->msize, clnt->dotu);
P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n",
clnt, clnt->trans_mod, clnt->msize, clnt->proto_version);
err = clnt->trans_mod->create(clnt, dev_name, options);
if (err)
@ -812,7 +825,7 @@ struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
goto error;
}
err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid);
err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
if (err) {
p9pdu_dump(1, req->rc);
p9_free_req(clnt, req);
@ -861,7 +874,7 @@ p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname)
goto error;
}
err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid);
err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
if (err) {
p9pdu_dump(1, req->rc);
p9_free_req(clnt, req);
@ -919,7 +932,7 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
goto error;
}
err = p9pdu_readf(req->rc, clnt->dotu, "R", &nwqids, &wqids);
err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids);
if (err) {
p9pdu_dump(1, req->rc);
p9_free_req(clnt, req);
@ -980,7 +993,7 @@ int p9_client_open(struct p9_fid *fid, int mode)
goto error;
}
err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit);
err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
if (err) {
p9pdu_dump(1, req->rc);
goto free_and_error;
@ -1025,7 +1038,7 @@ int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
goto error;
}
err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit);
err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
if (err) {
p9pdu_dump(1, req->rc);
goto free_and_error;
@ -1126,7 +1139,7 @@ p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
goto error;
}
err = p9pdu_readf(req->rc, clnt->dotu, "D", &count, &dataptr);
err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
if (err) {
p9pdu_dump(1, req->rc);
goto free_and_error;
@ -1187,7 +1200,7 @@ p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
goto error;
}
err = p9pdu_readf(req->rc, clnt->dotu, "d", &count);
err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count);
if (err) {
p9pdu_dump(1, req->rc);
goto free_and_error;
@ -1227,7 +1240,7 @@ struct p9_wstat *p9_client_stat(struct p9_fid *fid)
goto error;
}
err = p9pdu_readf(req->rc, clnt->dotu, "wS", &ignored, ret);
err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret);
if (err) {
p9pdu_dump(1, req->rc);
p9_free_req(clnt, req);
@ -1254,7 +1267,7 @@ struct p9_wstat *p9_client_stat(struct p9_fid *fid)
}
EXPORT_SYMBOL(p9_client_stat);
static int p9_client_statsize(struct p9_wstat *wst, int optional)
static int p9_client_statsize(struct p9_wstat *wst, int proto_version)
{
int ret;
@ -1273,7 +1286,7 @@ static int p9_client_statsize(struct p9_wstat *wst, int optional)
if (wst->muid)
ret += strlen(wst->muid);
if (optional) {
if (proto_version == p9_proto_2000u) {
ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */
if (wst->extension)
ret += strlen(wst->extension);
@ -1290,7 +1303,7 @@ int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
err = 0;
clnt = fid->clnt;
wst->size = p9_client_statsize(wst, clnt->dotu);
wst->size = p9_client_statsize(wst, clnt->proto_version);
P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
P9_DPRINTK(P9_DEBUG_9P,
" sz=%x type=%x dev=%x qid=%x.%llx.%x\n"

74
net/9p/protocol.c
View File

@ -52,7 +52,7 @@
#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 +144,8 @@ 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 +195,8 @@ 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 +219,7 @@ 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 +232,7 @@ 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 +252,7 @@ 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 +265,8 @@ 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 +280,8 @@ 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 +309,7 @@ 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 +324,8 @@ 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 +340,7 @@ 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 +356,8 @@ 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 +394,8 @@ 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 +404,7 @@ 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 +412,7 @@ 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 +427,8 @@ 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 +437,8 @@ 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 +447,15 @@ 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 +469,15 @@ 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 +487,7 @@ 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 +502,32 @@ 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 +537,7 @@ 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);

6
net/9p/protocol.h
View File

@ -25,9 +25,9 @@
*
*/
int
p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap);
int p9pdu_readf(struct p9_fcall *pdu, int optional, const char *fmt, ...);
int p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
va_list ap);
int p9pdu_readf(struct p9_fcall *pdu, int proto_version, const char *fmt, ...);
int p9pdu_prepare(struct p9_fcall *pdu, int16_t tag, int8_t type);
int p9pdu_finalize(struct p9_fcall *pdu);
void p9pdu_dump(int, struct p9_fcall *);