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Diffstat (limited to 'fs/9p/trans_fd.c')
-rw-r--r--fs/9p/trans_fd.c308
1 files changed, 0 insertions, 308 deletions
diff --git a/fs/9p/trans_fd.c b/fs/9p/trans_fd.c
deleted file mode 100644
index 34d43355beb7..000000000000
--- a/fs/9p/trans_fd.c
+++ /dev/null
@@ -1,308 +0,0 @@
-/*
- * linux/fs/9p/trans_fd.c
- *
- * Fd transport layer. Includes deprecated socket layer.
- *
- * 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) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#include <linux/in.h>
-#include <linux/module.h>
-#include <linux/net.h>
-#include <linux/ipv6.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/un.h>
-#include <asm/uaccess.h>
-#include <linux/inet.h>
-#include <linux/idr.h>
-#include <linux/file.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "transport.h"
-
-#define V9FS_PORT 564
-
-struct v9fs_trans_fd {
- struct file *rd;
- struct file *wr;
-};
-
-/**
- * v9fs_fd_read- read from a fd
- * @v9ses: session information
- * @v: buffer to receive data into
- * @len: size of receive buffer
- *
- */
-static int v9fs_fd_read(struct v9fs_transport *trans, void *v, int len)
-{
- int ret;
- struct v9fs_trans_fd *ts;
-
- if (!trans || trans->status == Disconnected || !(ts = trans->priv))
- return -EREMOTEIO;
-
- if (!(ts->rd->f_flags & O_NONBLOCK))
- dprintk(DEBUG_ERROR, "blocking read ...\n");
-
- ret = kernel_read(ts->rd, ts->rd->f_pos, v, len);
- if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
- trans->status = Disconnected;
- return ret;
-}
-
-/**
- * v9fs_fd_write - write to a socket
- * @v9ses: session information
- * @v: buffer to send data from
- * @len: size of send buffer
- *
- */
-static int v9fs_fd_write(struct v9fs_transport *trans, void *v, int len)
-{
- int ret;
- mm_segment_t oldfs;
- struct v9fs_trans_fd *ts;
-
- if (!trans || trans->status == Disconnected || !(ts = trans->priv))
- return -EREMOTEIO;
-
- if (!(ts->wr->f_flags & O_NONBLOCK))
- dprintk(DEBUG_ERROR, "blocking write ...\n");
-
- oldfs = get_fs();
- set_fs(get_ds());
- /* The cast to a user pointer is valid due to the set_fs() */
- ret = vfs_write(ts->wr, (void __user *)v, len, &ts->wr->f_pos);
- set_fs(oldfs);
-
- if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
- trans->status = Disconnected;
- return ret;
-}
-
-static unsigned int
-v9fs_fd_poll(struct v9fs_transport *trans, struct poll_table_struct *pt)
-{
- int ret, n;
- struct v9fs_trans_fd *ts;
- mm_segment_t oldfs;
-
- if (!trans || trans->status != Connected || !(ts = trans->priv))
- return -EREMOTEIO;
-
- if (!ts->rd->f_op || !ts->rd->f_op->poll)
- return -EIO;
-
- if (!ts->wr->f_op || !ts->wr->f_op->poll)
- return -EIO;
-
- oldfs = get_fs();
- set_fs(get_ds());
-
- ret = ts->rd->f_op->poll(ts->rd, pt);
- if (ret < 0)
- goto end;
-
- if (ts->rd != ts->wr) {
- n = ts->wr->f_op->poll(ts->wr, pt);
- if (n < 0) {
- ret = n;
- goto end;
- }
- ret = (ret & ~POLLOUT) | (n & ~POLLIN);
- }
-
- end:
- set_fs(oldfs);
- return ret;
-}
-
-static int v9fs_fd_open(struct v9fs_session_info *v9ses, int rfd, int wfd)
-{
- struct v9fs_transport *trans = v9ses->transport;
- struct v9fs_trans_fd *ts = kmalloc(sizeof(struct v9fs_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;
-}
-
-static int v9fs_fd_init(struct v9fs_session_info *v9ses, const char *addr,
- char *data)
-{
- if (v9ses->rfdno == ~0 || v9ses->wfdno == ~0) {
- printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
- return -ENOPROTOOPT;
- }
-
- return v9fs_fd_open(v9ses, v9ses->rfdno, v9ses->wfdno);
-}
-
-static int v9fs_socket_open(struct v9fs_session_info *v9ses,
- struct socket *csocket)
-{
- int fd, ret;
-
- csocket->sk->sk_allocation = GFP_NOIO;
- if ((fd = sock_map_fd(csocket)) < 0) {
- eprintk(KERN_ERR, "v9fs_socket_open: failed to map fd\n");
- ret = fd;
- release_csocket:
- sock_release(csocket);
- return ret;
- }
-
- if ((ret = v9fs_fd_open(v9ses, fd, fd)) < 0) {
- sockfd_put(csocket);
- eprintk(KERN_ERR, "v9fs_socket_open: failed to open fd\n");
- goto release_csocket;
- }
-
- ((struct v9fs_trans_fd *)v9ses->transport->priv)->rd->f_flags |=
- O_NONBLOCK;
- return 0;
-}
-
-static int v9fs_tcp_init(struct v9fs_session_info *v9ses, const char *addr,
- char *data)
-{
- int ret;
- struct socket *csocket = NULL;
- struct sockaddr_in sin_server;
-
- sin_server.sin_family = AF_INET;
- sin_server.sin_addr.s_addr = in_aton(addr);
- sin_server.sin_port = htons(v9ses->port);
- sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
-
- if (!csocket) {
- eprintk(KERN_ERR, "v9fs_trans_tcp: problem creating socket\n");
- return -1;
- }
-
- ret = csocket->ops->connect(csocket,
- (struct sockaddr *)&sin_server,
- sizeof(struct sockaddr_in), 0);
- if (ret < 0) {
- eprintk(KERN_ERR,
- "v9fs_trans_tcp: problem connecting socket to %s\n",
- addr);
- return ret;
- }
-
- return v9fs_socket_open(v9ses, csocket);
-}
-
-static int
-v9fs_unix_init(struct v9fs_session_info *v9ses, const char *addr, char *data)
-{
- int ret;
- struct socket *csocket;
- struct sockaddr_un sun_server;
-
- if (strlen(addr) > UNIX_PATH_MAX) {
- eprintk(KERN_ERR, "v9fs_trans_unix: address too long: %s\n",
- addr);
- return -ENAMETOOLONG;
- }
-
- sun_server.sun_family = PF_UNIX;
- strcpy(sun_server.sun_path, addr);
- sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
- ret = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
- sizeof(struct sockaddr_un) - 1, 0);
- if (ret < 0) {
- eprintk(KERN_ERR,
- "v9fs_trans_unix: problem connecting socket: %s: %d\n",
- addr, ret);
- return ret;
- }
-
- return v9fs_socket_open(v9ses, csocket);
-}
-
-/**
- * v9fs_sock_close - shutdown socket
- * @trans: private socket structure
- *
- */
-static void v9fs_fd_close(struct v9fs_transport *trans)
-{
- struct v9fs_trans_fd *ts;
-
- if (!trans)
- return;
-
- ts = xchg(&trans->priv, NULL);
-
- if (!ts)
- return;
-
- trans->status = Disconnected;
- if (ts->rd)
- fput(ts->rd);
- if (ts->wr)
- fput(ts->wr);
- kfree(ts);
-}
-
-struct v9fs_transport v9fs_trans_fd = {
- .init = v9fs_fd_init,
- .write = v9fs_fd_write,
- .read = v9fs_fd_read,
- .close = v9fs_fd_close,
- .poll = v9fs_fd_poll,
-};
-
-struct v9fs_transport v9fs_trans_tcp = {
- .init = v9fs_tcp_init,
- .write = v9fs_fd_write,
- .read = v9fs_fd_read,
- .close = v9fs_fd_close,
- .poll = v9fs_fd_poll,
-};
-
-struct v9fs_transport v9fs_trans_unix = {
- .init = v9fs_unix_init,
- .write = v9fs_fd_write,
- .read = v9fs_fd_read,
- .close = v9fs_fd_close,
- .poll = v9fs_fd_poll,
-};
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-23 17:43:21 +0000