*
* Copyright (C) 2006 by Russ Cox <rsc@swtch.com>
* Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
- * Copyright (C) 2004-2005 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2004-2007 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
*
* This program is free software; you can redistribute it and/or modify
#include <linux/inet.h>
#include <linux/idr.h>
#include <linux/file.h>
+#include <linux/parser.h>
#include <net/9p/9p.h>
#include <net/9p/transport.h>
#define P9_PORT 564
+#define MAX_SOCK_BUF (64*1024)
+
+
+struct p9_fd_opts {
+ int rfd;
+ int wfd;
+ u16 port;
+};
struct p9_trans_fd {
struct file *rd;
struct file *wr;
};
-static int p9_socket_open(struct p9_transport *trans, struct socket *csocket);
-static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd);
-static int p9_fd_read(struct p9_transport *trans, void *v, int len);
-static int p9_fd_write(struct p9_transport *trans, void *v, int len);
-static unsigned int p9_fd_poll(struct p9_transport *trans,
- struct poll_table_struct *pt);
-static void p9_fd_close(struct p9_transport *trans);
-
-struct p9_transport *p9_trans_create_tcp(const char *addr, int port)
-{
- int err;
- struct p9_transport *trans;
- struct socket *csocket;
- struct sockaddr_in sin_server;
-
- csocket = NULL;
- trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
- if (!trans)
- return ERR_PTR(-ENOMEM);
-
- trans->write = p9_fd_write;
- trans->read = p9_fd_read;
- trans->close = p9_fd_close;
- trans->poll = p9_fd_poll;
-
- sin_server.sin_family = AF_INET;
- sin_server.sin_addr.s_addr = in_aton(addr);
- sin_server.sin_port = htons(port);
- sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
-
- if (!csocket) {
- P9_EPRINTK(KERN_ERR, "p9_trans_tcp: problem creating socket\n");
- err = -EIO;
- goto error;
- }
-
- err = csocket->ops->connect(csocket,
- (struct sockaddr *)&sin_server,
- sizeof(struct sockaddr_in), 0);
- if (err < 0) {
- P9_EPRINTK(KERN_ERR,
- "p9_trans_tcp: problem connecting socket to %s\n",
- addr);
- goto error;
- }
-
- err = p9_socket_open(trans, csocket);
- if (err < 0)
- goto error;
+/*
+ * Option Parsing (code inspired by NFS code)
+ * - a little lazy - parse all fd-transport options
+ */
- return trans;
+enum {
+ /* Options that take integer arguments */
+ Opt_port, Opt_rfdno, Opt_wfdno,
+};
-error:
- if (csocket)
- sock_release(csocket);
+static match_table_t tokens = {
+ {Opt_port, "port=%u"},
+ {Opt_rfdno, "rfdno=%u"},
+ {Opt_wfdno, "wfdno=%u"},
+};
- kfree(trans);
- return ERR_PTR(err);
-}
-EXPORT_SYMBOL(p9_trans_create_tcp);
+/**
+ * v9fs_parse_options - parse mount options into session structure
+ * @options: options string passed from mount
+ * @v9ses: existing v9fs session information
+ *
+ */
-struct p9_transport *p9_trans_create_unix(const char *addr)
+static void parse_opts(char *options, struct p9_fd_opts *opts)
{
- int err;
- struct socket *csocket;
- struct sockaddr_un sun_server;
- struct p9_transport *trans;
-
- csocket = NULL;
- trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
- if (!trans)
- return ERR_PTR(-ENOMEM);
+ char *p;
+ substring_t args[MAX_OPT_ARGS];
+ int option;
+ int ret;
- trans->write = p9_fd_write;
- trans->read = p9_fd_read;
- trans->close = p9_fd_close;
- trans->poll = p9_fd_poll;
+ opts->port = P9_PORT;
+ opts->rfd = ~0;
+ opts->wfd = ~0;
- if (strlen(addr) > UNIX_PATH_MAX) {
- P9_EPRINTK(KERN_ERR, "p9_trans_unix: address too long: %s\n",
- addr);
- err = -ENAMETOOLONG;
- goto error;
- }
+ if (!options)
+ return;
- sun_server.sun_family = PF_UNIX;
- strcpy(sun_server.sun_path, addr);
- sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
- err = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
- sizeof(struct sockaddr_un) - 1, 0);
- if (err < 0) {
- P9_EPRINTK(KERN_ERR,
- "p9_trans_unix: problem connecting socket: %s: %d\n",
- addr, err);
- goto error;
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+ if (!*p)
+ continue;
+ token = match_token(p, tokens, args);
+ 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_port:
+ opts->port = option;
+ break;
+ case Opt_rfdno:
+ opts->rfd = option;
+ break;
+ case Opt_wfdno:
+ opts->wfd = option;
+ break;
+ default:
+ continue;
+ }
}
-
- err = p9_socket_open(trans, csocket);
- if (err < 0)
- goto error;
-
- return trans;
-
-error:
- if (csocket)
- sock_release(csocket);
-
- kfree(trans);
- return ERR_PTR(err);
}
-EXPORT_SYMBOL(p9_trans_create_unix);
-struct p9_transport *p9_trans_create_fd(int rfd, int wfd)
+static int p9_fd_open(struct p9_trans *trans, int rfd, int wfd)
{
- int err;
- struct p9_transport *trans;
+ struct p9_trans_fd *ts = kmalloc(sizeof(struct p9_trans_fd),
+ GFP_KERNEL);
+ if (!ts)
+ return -ENOMEM;
- if (rfd == ~0 || wfd == ~0) {
- printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
- return ERR_PTR(-ENOPROTOOPT);
+ ts->rd = fget(rfd);
+ ts->wr = fget(wfd);
+ if (!ts->rd || !ts->wr) {
+ if (ts->rd)
+ fput(ts->rd);
+ if (ts->wr)
+ fput(ts->wr);
+ kfree(ts);
+ return -EIO;
}
- trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
- if (!trans)
- return ERR_PTR(-ENOMEM);
-
- trans->write = p9_fd_write;
- trans->read = p9_fd_read;
- trans->close = p9_fd_close;
- trans->poll = p9_fd_poll;
-
- err = p9_fd_open(trans, rfd, wfd);
- if (err < 0)
- goto error;
-
- return trans;
+ trans->priv = ts;
+ trans->status = Connected;
-error:
- kfree(trans);
- return ERR_PTR(err);
+ return 0;
}
-EXPORT_SYMBOL(p9_trans_create_fd);
-static int p9_socket_open(struct p9_transport *trans, struct socket *csocket)
+static int p9_socket_open(struct p9_trans *trans, struct socket *csocket)
{
int fd, ret;
return 0;
}
-static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd)
-{
- struct p9_trans_fd *ts = kmalloc(sizeof(struct p9_trans_fd),
- GFP_KERNEL);
- if (!ts)
- return -ENOMEM;
-
- ts->rd = fget(rfd);
- ts->wr = fget(wfd);
- if (!ts->rd || !ts->wr) {
- if (ts->rd)
- fput(ts->rd);
- if (ts->wr)
- fput(ts->wr);
- kfree(ts);
- return -EIO;
- }
-
- trans->priv = ts;
- trans->status = Connected;
-
- return 0;
-}
-
/**
* p9_fd_read- read from a fd
* @v9ses: session information
* @len: size of receive buffer
*
*/
-static int p9_fd_read(struct p9_transport *trans, void *v, int len)
+static int p9_fd_read(struct p9_trans *trans, void *v, int len)
{
int ret;
struct p9_trans_fd *ts = NULL;
* @len: size of send buffer
*
*/
-static int p9_fd_write(struct p9_transport *trans, void *v, int len)
+static int p9_fd_write(struct p9_trans *trans, void *v, int len)
{
int ret;
mm_segment_t oldfs;
}
static unsigned int
-p9_fd_poll(struct p9_transport *trans, struct poll_table_struct *pt)
+p9_fd_poll(struct p9_trans *trans, struct poll_table_struct *pt)
{
int ret, n;
struct p9_trans_fd *ts = NULL;
* @trans: private socket structure
*
*/
-static void p9_fd_close(struct p9_transport *trans)
+static void p9_fd_close(struct p9_trans *trans)
{
struct p9_trans_fd *ts;
kfree(ts);
}
+static struct p9_trans *p9_trans_create_tcp(const char *addr, char *args)
+{
+ int err;
+ struct p9_trans *trans;
+ struct socket *csocket;
+ struct sockaddr_in sin_server;
+ struct p9_fd_opts opts;
+
+ parse_opts(args, &opts);
+
+ csocket = NULL;
+ trans = kmalloc(sizeof(struct p9_trans), GFP_KERNEL);
+ if (!trans)
+ return ERR_PTR(-ENOMEM);
+
+ trans->write = p9_fd_write;
+ trans->read = p9_fd_read;
+ trans->close = p9_fd_close;
+ trans->poll = p9_fd_poll;
+
+ sin_server.sin_family = AF_INET;
+ sin_server.sin_addr.s_addr = in_aton(addr);
+ sin_server.sin_port = htons(opts.port);
+ sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
+
+ if (!csocket) {
+ P9_EPRINTK(KERN_ERR, "p9_trans_tcp: problem creating socket\n");
+ err = -EIO;
+ goto error;
+ }
+
+ err = csocket->ops->connect(csocket,
+ (struct sockaddr *)&sin_server,
+ sizeof(struct sockaddr_in), 0);
+ if (err < 0) {
+ P9_EPRINTK(KERN_ERR,
+ "p9_trans_tcp: problem connecting socket to %s\n",
+ addr);
+ goto error;
+ }
+
+ err = p9_socket_open(trans, csocket);
+ if (err < 0)
+ goto error;
+
+ return trans;
+
+error:
+ if (csocket)
+ sock_release(csocket);
+
+ kfree(trans);
+ return ERR_PTR(err);
+}
+
+static struct p9_trans *p9_trans_create_unix(const char *addr, char *args)
+{
+ int err;
+ struct socket *csocket;
+ struct sockaddr_un sun_server;
+ struct p9_trans *trans;
+
+ csocket = NULL;
+ trans = kmalloc(sizeof(struct p9_trans), GFP_KERNEL);
+ if (!trans)
+ return ERR_PTR(-ENOMEM);
+
+ trans->write = p9_fd_write;
+ trans->read = p9_fd_read;
+ trans->close = p9_fd_close;
+ trans->poll = p9_fd_poll;
+
+ if (strlen(addr) > UNIX_PATH_MAX) {
+ P9_EPRINTK(KERN_ERR, "p9_trans_unix: address too long: %s\n",
+ addr);
+ err = -ENAMETOOLONG;
+ goto error;
+ }
+
+ sun_server.sun_family = PF_UNIX;
+ strcpy(sun_server.sun_path, addr);
+ sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
+ err = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
+ sizeof(struct sockaddr_un) - 1, 0);
+ if (err < 0) {
+ P9_EPRINTK(KERN_ERR,
+ "p9_trans_unix: problem connecting socket: %s: %d\n",
+ addr, err);
+ goto error;
+ }
+
+ err = p9_socket_open(trans, csocket);
+ if (err < 0)
+ goto error;
+
+ return trans;
+
+error:
+ if (csocket)
+ sock_release(csocket);
+
+ kfree(trans);
+ return ERR_PTR(err);
+}
+
+static struct p9_trans *p9_trans_create_fd(const char *name, char *args)
+{
+ int err;
+ struct p9_trans *trans;
+ struct p9_fd_opts opts;
+
+ parse_opts(args, &opts);
+
+ if (opts.rfd == ~0 || opts.wfd == ~0) {
+ printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
+ return ERR_PTR(-ENOPROTOOPT);
+ }
+
+ trans = kmalloc(sizeof(struct p9_trans), GFP_KERNEL);
+ if (!trans)
+ return ERR_PTR(-ENOMEM);
+
+ trans->write = p9_fd_write;
+ trans->read = p9_fd_read;
+ trans->close = p9_fd_close;
+ trans->poll = p9_fd_poll;
+
+ err = p9_fd_open(trans, opts.rfd, opts.wfd);
+ if (err < 0)
+ goto error;
+
+ return trans;
+
+error:
+ kfree(trans);
+ return ERR_PTR(err);
+}
+
+static struct p9_trans_module p9_tcp_trans = {
+ .name = "tcp",
+ .maxsize = MAX_SOCK_BUF,
+ .def = 1,
+ .create = p9_trans_create_tcp,
+};
+
+static struct p9_trans_module p9_unix_trans = {
+ .name = "unix",
+ .maxsize = MAX_SOCK_BUF,
+ .def = 0,
+ .create = p9_trans_create_unix,
+};
+
+static struct p9_trans_module p9_fd_trans = {
+ .name = "fd",
+ .maxsize = MAX_SOCK_BUF,
+ .def = 0,
+ .create = p9_trans_create_fd,
+};
+
+static int __init p9_trans_fd_init(void)
+{
+ v9fs_register_trans(&p9_tcp_trans);
+ v9fs_register_trans(&p9_unix_trans);
+ v9fs_register_trans(&p9_fd_trans);
+
+ return 1;
+}
+
+static void __exit p9_trans_fd_exit(void) {
+ printk(KERN_ERR "Removal of 9p transports not implemented\n");
+ BUG();
+}
+
+module_init(p9_trans_fd_init);
+module_exit(p9_trans_fd_exit);
+
+MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
+MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
+MODULE_LICENSE("GPL");
projects / firefly-linux-kernel-4.4.55.git / blobdiff