02da398b95
Remove depricated conv functions which have been replaced with new protocol routines. This patch also reworks the one instance of the file-system code which directly calls conversion routines (to accomplish unpacking dirreads). Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
152 lines
3.3 KiB
C
152 lines
3.3 KiB
C
/*
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* linux/fs/9p/vfs_dir.c
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*
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* This file contains vfs directory ops for the 9P2000 protocol.
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*
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* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/sched.h>
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#include <linux/inet.h>
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#include <linux/idr.h>
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#include <net/9p/9p.h>
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#include <net/9p/client.h>
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#include "v9fs.h"
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#include "v9fs_vfs.h"
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#include "fid.h"
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/**
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* dt_type - return file type
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* @mistat: mistat structure
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*
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*/
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static inline int dt_type(struct p9_wstat *mistat)
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{
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unsigned long perm = mistat->mode;
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int rettype = DT_REG;
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if (perm & P9_DMDIR)
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rettype = DT_DIR;
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if (perm & P9_DMSYMLINK)
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rettype = DT_LNK;
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return rettype;
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}
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/**
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* v9fs_dir_readdir - read a directory
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* @filp: opened file structure
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* @dirent: directory structure ???
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* @filldir: function to populate directory structure ???
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*
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*/
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static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
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{
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int over;
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struct p9_wstat st;
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int err;
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struct p9_fid *fid;
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int buflen;
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char *statbuf;
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int n, i = 0;
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P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
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fid = filp->private_data;
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buflen = fid->clnt->msize - P9_IOHDRSZ;
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statbuf = kmalloc(buflen, GFP_KERNEL);
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if (!statbuf)
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return -ENOMEM;
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while (1) {
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err = v9fs_file_readn(filp, statbuf, NULL, buflen,
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fid->rdir_fpos);
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if (err <= 0)
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break;
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n = err;
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while (i < n) {
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err = p9stat_read(statbuf + i, buflen-i, &st,
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fid->clnt->dotu);
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if (err) {
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P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err);
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err = -EIO;
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p9stat_free(&st);
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goto free_and_exit;
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}
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i += st.size+2;
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fid->rdir_fpos += st.size+2;
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over = filldir(dirent, st.name, strlen(st.name),
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filp->f_pos, v9fs_qid2ino(&st.qid), dt_type(&st));
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filp->f_pos += st.size+2;
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p9stat_free(&st);
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if (over) {
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err = 0;
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goto free_and_exit;
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}
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}
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}
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free_and_exit:
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kfree(statbuf);
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return err;
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}
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/**
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* v9fs_dir_release - close a directory
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* @inode: inode of the directory
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* @filp: file pointer to a directory
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*
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*/
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int v9fs_dir_release(struct inode *inode, struct file *filp)
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{
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struct p9_fid *fid;
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fid = filp->private_data;
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P9_DPRINTK(P9_DEBUG_VFS,
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"inode: %p filp: %p fid: %d\n", inode, filp, fid->fid);
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filemap_write_and_wait(inode->i_mapping);
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p9_client_clunk(fid);
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return 0;
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}
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const struct file_operations v9fs_dir_operations = {
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.read = generic_read_dir,
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.llseek = generic_file_llseek,
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.readdir = v9fs_dir_readdir,
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.open = v9fs_file_open,
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.release = v9fs_dir_release,
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};
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