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9p: transport API reorganization

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This merges the mux.c (including the connection interface) with trans_fd
in preparation for transport API changes.  Ultimately, trans_fd will need
to be rewritten to clean it up and simplify the implementation, but this
reorganization is viewed as the first step.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Eric Van Hensbergen
2008-02-06 19:25:03 -06:00
parent f39335453f
commit 8a0dc95fd9
11 changed files with 1208 additions and 1253 deletions
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115
net/9p/client.c
View File

@ -3,6 +3,7 @@
*
* 9P Client
*
* Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
*
* This program is free software; you can redistribute it and/or modify
@ -25,6 +26,7 @@
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/poll.h>
#include <linux/idr.h>
#include <linux/mutex.h>
#include <linux/sched.h>
@ -32,13 +34,82 @@
#include <net/9p/9p.h>
#include <linux/parser.h>
#include <net/9p/transport.h>
#include <net/9p/conn.h>
#include <net/9p/client.h>
static struct p9_fid *p9_fid_create(struct p9_client *clnt);
static void p9_fid_destroy(struct p9_fid *fid);
static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu);
/*
* Client Option Parsing (code inspired by NFS code)
* - a little lazy - parse all client options
*/
enum {
Opt_msize,
Opt_trans,
Opt_legacy,
Opt_err,
};
static match_table_t tokens = {
{Opt_msize, "msize=%u"},
{Opt_legacy, "noextend"},
{Opt_trans, "trans=%s"},
{Opt_err, NULL},
};
/**
* v9fs_parse_options - parse mount options into session structure
* @options: options string passed from mount
* @v9ses: existing v9fs session information
*
*/
static void parse_opts(char *options, struct p9_client *clnt)
{
char *p;
substring_t args[MAX_OPT_ARGS];
int option;
int ret;
clnt->trans_mod = v9fs_default_trans();
clnt->dotu = 1;
clnt->msize = 8192;
if (!options)
return;
while ((p = strsep(&options, ",")) != NULL) {
int token;
if (!*p)
continue;
token = match_token(p, tokens, args);
if (token < Opt_trans) {
ret = match_int(&args[0], &option);
if (ret < 0) {
P9_DPRINTK(P9_DEBUG_ERROR,
"integer field, but no integer?\n");
continue;
}
}
switch (token) {
case Opt_msize:
clnt->msize = option;
break;
case Opt_trans:
clnt->trans_mod = v9fs_match_trans(&args[0]);
break;
case Opt_legacy:
clnt->dotu = 0;
break;
default:
continue;
}
}
}
/**
* p9_client_rpc - sends 9P request and waits until a response is available.
* The function can be interrupted.
@ -50,14 +121,10 @@ int
p9_client_rpc(struct p9_client *c, struct p9_fcall *tc,
struct p9_fcall **rc)
{
if (c->trans->rpc)
return c->trans->rpc(c->trans, tc, rc, c->msize, c->dotu);
else
return p9_conn_rpc(c->conn, tc, rc);
return c->trans->rpc(c->trans, tc, rc);
}
struct p9_client *p9_client_create(struct p9_trans *trans, int msize,
int dotu)
struct p9_client *p9_client_create(const char *dev_name, char *options)
{
int err, n;
struct p9_client *clnt;
@ -71,12 +138,7 @@ struct p9_client *p9_client_create(struct p9_trans *trans, int msize,
if (!clnt)
return ERR_PTR(-ENOMEM);
P9_DPRINTK(P9_DEBUG_9P, "clnt %p trans %p msize %d dotu %d\n",
clnt, trans, msize, dotu);
spin_lock_init(&clnt->lock);
clnt->trans = trans;
clnt->msize = msize;
clnt->dotu = dotu;
INIT_LIST_HEAD(&clnt->fidlist);
clnt->fidpool = p9_idpool_create();
if (!clnt->fidpool) {
@ -85,13 +147,29 @@ struct p9_client *p9_client_create(struct p9_trans *trans, int msize,
goto error;
}
clnt->conn = p9_conn_create(clnt->trans, clnt->msize, &clnt->dotu);
if (IS_ERR(clnt->conn)) {
err = PTR_ERR(clnt->conn);
clnt->conn = NULL;
parse_opts(options, clnt);
if (clnt->trans_mod == NULL) {
err = -EPROTONOSUPPORT;
P9_DPRINTK(P9_DEBUG_ERROR,
"No transport defined or default transport\n");
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "clnt %p trans %p msize %d dotu %d\n",
clnt, clnt->trans_mod, clnt->msize, clnt->dotu);
clnt->trans = clnt->trans_mod->create(dev_name, options, clnt->msize,
clnt->dotu);
if (IS_ERR(clnt->trans)) {
err = PTR_ERR(clnt->trans);
clnt->trans = NULL;
goto error;
}
if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize)
clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ;
tc = p9_create_tversion(clnt->msize, clnt->dotu?"9P2000.u":"9P2000");
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
@ -134,10 +212,6 @@ void p9_client_destroy(struct p9_client *clnt)
struct p9_fid *fid, *fidptr;
P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
if (clnt->conn) {
p9_conn_destroy(clnt->conn);
clnt->conn = NULL;
}
if (clnt->trans) {
clnt->trans->close(clnt->trans);
@ -159,7 +233,6 @@ void p9_client_disconnect(struct p9_client *clnt)
{
P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
clnt->trans->status = Disconnected;
p9_conn_cancel(clnt->conn, -EIO);
}
EXPORT_SYMBOL(p9_client_disconnect);