mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-01 08:04:22 +08:00
51a87c552d
Now that the new protocol functions are in place, this patch switches the client code to using the new support code. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
149 lines
3.2 KiB
C
149 lines
3.2 KiB
C
/*
|
|
* linux/fs/9p/vfs_dir.c
|
|
*
|
|
* This file contains vfs directory ops for the 9P2000 protocol.
|
|
*
|
|
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
|
|
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
|
|
*
|
|
* 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/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/file.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/inet.h>
|
|
#include <linux/idr.h>
|
|
#include <net/9p/9p.h>
|
|
#include <net/9p/client.h>
|
|
|
|
#include "v9fs.h"
|
|
#include "v9fs_vfs.h"
|
|
#include "fid.h"
|
|
|
|
/**
|
|
* dt_type - return file type
|
|
* @mistat: mistat structure
|
|
*
|
|
*/
|
|
|
|
static inline int dt_type(struct p9_stat *mistat)
|
|
{
|
|
unsigned long perm = mistat->mode;
|
|
int rettype = DT_REG;
|
|
|
|
if (perm & P9_DMDIR)
|
|
rettype = DT_DIR;
|
|
if (perm & P9_DMSYMLINK)
|
|
rettype = DT_LNK;
|
|
|
|
return rettype;
|
|
}
|
|
|
|
/**
|
|
* v9fs_dir_readdir - read a directory
|
|
* @filp: opened file structure
|
|
* @dirent: directory structure ???
|
|
* @filldir: function to populate directory structure ???
|
|
*
|
|
*/
|
|
|
|
static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
|
|
{
|
|
int over;
|
|
struct p9_stat st;
|
|
int err;
|
|
struct p9_fid *fid;
|
|
int buflen;
|
|
char *statbuf;
|
|
int n, i = 0;
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
|
|
fid = filp->private_data;
|
|
|
|
buflen = fid->clnt->msize - P9_IOHDRSZ;
|
|
statbuf = kmalloc(buflen, GFP_KERNEL);
|
|
if (!statbuf)
|
|
return -ENOMEM;
|
|
|
|
while (1) {
|
|
err = v9fs_file_readn(filp, statbuf, NULL, buflen,
|
|
fid->rdir_fpos);
|
|
if (err <= 0)
|
|
break;
|
|
|
|
n = err;
|
|
while (i < n) {
|
|
err = p9_deserialize_stat(statbuf + i, buflen-i, &st,
|
|
fid->clnt->dotu);
|
|
if (!err) {
|
|
err = -EIO;
|
|
goto free_and_exit;
|
|
}
|
|
|
|
i += err;
|
|
fid->rdir_fpos += err;
|
|
|
|
over = filldir(dirent, st.name.str, st.name.len,
|
|
filp->f_pos, v9fs_qid2ino(&st.qid), dt_type(&st));
|
|
|
|
filp->f_pos += st.size;
|
|
|
|
if (over) {
|
|
err = 0;
|
|
goto free_and_exit;
|
|
}
|
|
}
|
|
}
|
|
|
|
free_and_exit:
|
|
kfree(statbuf);
|
|
return err;
|
|
}
|
|
|
|
|
|
/**
|
|
* v9fs_dir_release - close a directory
|
|
* @inode: inode of the directory
|
|
* @filp: file pointer to a directory
|
|
*
|
|
*/
|
|
|
|
int v9fs_dir_release(struct inode *inode, struct file *filp)
|
|
{
|
|
struct p9_fid *fid;
|
|
|
|
fid = filp->private_data;
|
|
P9_DPRINTK(P9_DEBUG_VFS,
|
|
"inode: %p filp: %p fid: %d\n", inode, filp, fid->fid);
|
|
filemap_write_and_wait(inode->i_mapping);
|
|
p9_client_clunk(fid);
|
|
return 0;
|
|
}
|
|
|
|
const struct file_operations v9fs_dir_operations = {
|
|
.read = generic_read_dir,
|
|
.llseek = generic_file_llseek,
|
|
.readdir = v9fs_dir_readdir,
|
|
.open = v9fs_file_open,
|
|
.release = v9fs_dir_release,
|
|
};
|