diff options
Diffstat (limited to 'fs/9p/trans_fd.c')
| -rw-r--r-- | fs/9p/trans_fd.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/fs/9p/trans_fd.c b/fs/9p/trans_fd.c deleted file mode 100644 index 1a28ef97a3d..00000000000 --- a/fs/9p/trans_fd.c +++ /dev/null @@ -1,215 +0,0 @@ -/* - * linux/fs/9p/trans_fd.c - * - * File Descriptor Transport Layer - * - * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net> - * Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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/config.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" - -struct v9fs_trans_fd { - struct file *in_file; - struct file *out_file; -}; - -/** - * v9fs_fd_recv - receive from a socket - * @v9ses: session information - * @v: buffer to receive data into - * @len: size of receive buffer - * - */ - -static int v9fs_fd_recv(struct v9fs_transport *trans, void *v, int len) -{ - struct v9fs_trans_fd *ts = trans ? trans->priv : NULL; - - if (!trans || trans->status != Connected || !ts) - return -EIO; - - return kernel_read(ts->in_file, ts->in_file->f_pos, v, len); -} - -/** - * v9fs_fd_send - send to a socket - * @v9ses: session information - * @v: buffer to send data from - * @len: size of send buffer - * - */ - -static int v9fs_fd_send(struct v9fs_transport *trans, void *v, int len) -{ - struct v9fs_trans_fd *ts = trans ? trans->priv : NULL; - mm_segment_t oldfs = get_fs(); - int ret = 0; - - if (!trans || trans->status != Connected || !ts) - return -EIO; - - set_fs(get_ds()); - /* The cast to a user pointer is valid due to the set_fs() */ - ret = vfs_write(ts->out_file, (void __user *)v, len, &ts->out_file->f_pos); - set_fs(oldfs); - - return ret; -} - -/** - * v9fs_fd_init - initialize file descriptor transport - * @v9ses: session information - * @addr: address of server to mount - * @data: mount options - * - */ - -static int -v9fs_fd_init(struct v9fs_session_info *v9ses, const char *addr, char *data) -{ - struct v9fs_trans_fd *ts = NULL; - struct v9fs_transport *trans = v9ses->transport; - - if((v9ses->wfdno == ~0) || (v9ses->rfdno == ~0)) { - printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n"); - return -ENOPROTOOPT; - } - - ts = kmalloc(sizeof(struct v9fs_trans_fd), GFP_KERNEL); - - if (!ts) - return -ENOMEM; - - ts->in_file = fget( v9ses->rfdno ); - ts->out_file = fget( v9ses->wfdno ); - - if (!ts->in_file || !ts->out_file) { - if (ts->in_file) - fput(ts->in_file); - - if (ts->out_file) - fput(ts->out_file); - - kfree(ts); - return -EIO; - } - - trans->priv = ts; - trans->status = Connected; - - return 0; -} - - -/** - * v9fs_fd_close - shutdown file descriptor - * @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->in_file) - fput(ts->in_file); - - if (ts->out_file) - fput(ts->out_file); - - kfree(ts); -} - -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) - return -EIO; - - ts = trans->priv; - if (trans->status != Connected || !ts) - return -EIO; - - oldfs = get_fs(); - set_fs(get_ds()); - - if (!ts->in_file->f_op || !ts->in_file->f_op->poll) { - ret = -EIO; - goto end; - } - - ret = ts->in_file->f_op->poll(ts->in_file, pt); - - if (ts->out_file != ts->in_file) { - if (!ts->out_file->f_op || !ts->out_file->f_op->poll) { - ret = -EIO; - goto end; - } - - n = ts->out_file->f_op->poll(ts->out_file, pt); - - ret &= ~POLLOUT; - n &= ~POLLIN; - - ret |= n; - } - -end: - set_fs(oldfs); - return ret; -} - - -struct v9fs_transport v9fs_trans_fd = { - .init = v9fs_fd_init, - .write = v9fs_fd_send, - .read = v9fs_fd_recv, - .close = v9fs_fd_close, - .poll = v9fs_fd_poll, -}; - |