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[PATCH] v9fs: VFS file, dentry, and directory operations
This part of the patch contains the VFS file, dentry & directory interfaces. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric Van Hensbergen
Linus Torvalds
parent
93fa58cb83
commit
e69e7fe5b0
3 changed files with 753 additions and 0 deletions
126
fs/9p/vfs_dentry.c
Normal file
126
fs/9p/vfs_dentry.c
Normal file
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@ -0,0 +1,126 @@
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/*
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* linux/fs/9p/vfs_dentry.c
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*
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* This file contians vfs dentry 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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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/pagemap.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/smp_lock.h>
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#include <linux/inet.h>
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#include <linux/namei.h>
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#include <linux/idr.h>
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#include "debug.h"
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#include "v9fs.h"
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#include "9p.h"
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#include "v9fs_vfs.h"
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#include "conv.h"
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#include "fid.h"
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/**
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* v9fs_dentry_validate - VFS dcache hook to validate cache
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* @dentry: dentry that is being validated
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* @nd: path data
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*
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* dcache really shouldn't be used for 9P2000 as at all due to
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* potential attached semantics to directory traversal (walk).
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*
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* FUTURE: look into how to use dcache to allow multi-stage
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* walks in Plan 9 & potential for better dcache operation which
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* would remain valid for Plan 9 semantics. Older versions
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* had validation via stat for those interested. However, since
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* stat has the same approximate overhead as walk there really
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* is no difference. The only improvement would be from a
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* time-decay cache like NFS has and that undermines the
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* synchronous nature of 9P2000.
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*
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*/
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static int v9fs_dentry_validate(struct dentry *dentry, struct nameidata *nd)
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{
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struct dentry *dc = current->fs->pwd;
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dprintk(DEBUG_VFS, "dentry: %s (%p)\n", dentry->d_iname, dentry);
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if (v9fs_fid_lookup(dentry, FID_OP)) {
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dprintk(DEBUG_VFS, "VALID\n");
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return 1;
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}
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while (dc != NULL) {
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if (dc == dentry) {
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dprintk(DEBUG_VFS, "VALID\n");
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return 1;
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}
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if (dc == dc->d_parent)
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break;
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dc = dc->d_parent;
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}
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dprintk(DEBUG_VFS, "INVALID\n");
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return 0;
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}
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/**
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* v9fs_dentry_release - called when dentry is going to be freed
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* @dentry: dentry that is being release
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*
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*/
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void v9fs_dentry_release(struct dentry *dentry)
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{
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dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
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if (dentry->d_fsdata != NULL) {
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struct list_head *fid_list = dentry->d_fsdata;
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struct v9fs_fid *temp = NULL;
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struct v9fs_fid *current_fid = NULL;
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struct v9fs_fcall *fcall = NULL;
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list_for_each_entry_safe(current_fid, temp, fid_list, list) {
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if (v9fs_t_clunk
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(current_fid->v9ses, current_fid->fid, &fcall))
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dprintk(DEBUG_ERROR, "clunk failed: %s\n",
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FCALL_ERROR(fcall));
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v9fs_put_idpool(current_fid->fid,
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¤t_fid->v9ses->fidpool);
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kfree(fcall);
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v9fs_fid_destroy(current_fid);
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}
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kfree(dentry->d_fsdata); /* free the list_head */
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}
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}
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struct dentry_operations v9fs_dentry_operations = {
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.d_revalidate = v9fs_dentry_validate,
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.d_release = v9fs_dentry_release,
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};
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226
fs/9p/vfs_dir.c
Normal file
226
fs/9p/vfs_dir.c
Normal file
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@ -0,0 +1,226 @@
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/*
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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/smp_lock.h>
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#include <linux/inet.h>
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#include <linux/idr.h>
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#include "debug.h"
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#include "v9fs.h"
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#include "9p.h"
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#include "v9fs_vfs.h"
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#include "conv.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 v9fs_stat *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 & V9FS_DMDIR)
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rettype = DT_DIR;
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if (perm & V9FS_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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* @filep: 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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struct v9fs_fcall *fcall = NULL;
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struct inode *inode = filp->f_dentry->d_inode;
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struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
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struct v9fs_fid *file = filp->private_data;
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unsigned int i, n;
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int fid = -1;
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int ret = 0;
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struct v9fs_stat *mi = NULL;
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int over = 0;
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dprintk(DEBUG_VFS, "name %s\n", filp->f_dentry->d_name.name);
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fid = file->fid;
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mi = kmalloc(v9ses->maxdata, GFP_KERNEL);
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if (!mi)
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return -ENOMEM;
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if (file->rdir_fcall && (filp->f_pos != file->rdir_pos)) {
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kfree(file->rdir_fcall);
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file->rdir_fcall = NULL;
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}
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if (file->rdir_fcall) {
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n = file->rdir_fcall->params.rread.count;
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i = file->rdir_fpos;
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while (i < n) {
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int s = v9fs_deserialize_stat(v9ses,
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file->rdir_fcall->params.rread.data + i,
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n - i, mi, v9ses->maxdata);
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if (s == 0) {
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dprintk(DEBUG_ERROR,
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"error while deserializing mistat\n");
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ret = -EIO;
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goto FreeStructs;
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}
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over = filldir(dirent, mi->name, strlen(mi->name),
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filp->f_pos, v9fs_qid2ino(&mi->qid),
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dt_type(mi));
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if (over) {
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file->rdir_fpos = i;
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file->rdir_pos = filp->f_pos;
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break;
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}
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i += s;
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filp->f_pos += s;
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}
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if (!over) {
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kfree(file->rdir_fcall);
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file->rdir_fcall = NULL;
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}
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}
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while (!over) {
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ret = v9fs_t_read(v9ses, fid, filp->f_pos,
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v9ses->maxdata-V9FS_IOHDRSZ, &fcall);
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if (ret < 0) {
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dprintk(DEBUG_ERROR, "error while reading: %d: %p\n",
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ret, fcall);
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goto FreeStructs;
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} else if (ret == 0)
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break;
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n = ret;
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i = 0;
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while (i < n) {
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int s = v9fs_deserialize_stat(v9ses,
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fcall->params.rread.data + i, n - i, mi,
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v9ses->maxdata);
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if (s == 0) {
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dprintk(DEBUG_ERROR,
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"error while deserializing mistat\n");
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return -EIO;
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}
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over = filldir(dirent, mi->name, strlen(mi->name),
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filp->f_pos, v9fs_qid2ino(&mi->qid),
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dt_type(mi));
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if (over) {
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file->rdir_fcall = fcall;
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file->rdir_fpos = i;
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file->rdir_pos = filp->f_pos;
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fcall = NULL;
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break;
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}
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i += s;
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filp->f_pos += s;
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}
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kfree(fcall);
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}
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FreeStructs:
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kfree(fcall);
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kfree(mi);
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return ret;
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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 v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
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struct v9fs_fid *fid = filp->private_data;
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int fidnum = -1;
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dprintk(DEBUG_VFS, "inode: %p filp: %p fid: %d\n", inode, filp,
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fid->fid);
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fidnum = fid->fid;
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filemap_fdatawrite(inode->i_mapping);
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filemap_fdatawait(inode->i_mapping);
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if (fidnum >= 0) {
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fid->fidopen--;
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dprintk(DEBUG_VFS, "fidopen: %d v9f->fid: %d\n", fid->fidopen,
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fid->fid);
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if (fid->fidopen == 0) {
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if (v9fs_t_clunk(v9ses, fidnum, NULL))
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dprintk(DEBUG_ERROR, "clunk failed\n");
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v9fs_put_idpool(fid->fid, &v9ses->fidpool);
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}
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kfree(fid->rdir_fcall);
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filp->private_data = NULL;
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v9fs_fid_destroy(fid);
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}
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d_drop(filp->f_dentry);
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return 0;
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}
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struct file_operations v9fs_dir_operations = {
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.read = generic_read_dir,
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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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401
fs/9p/vfs_file.c
Normal file
401
fs/9p/vfs_file.c
Normal file
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@ -0,0 +1,401 @@
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/*
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* linux/fs/9p/vfs_file.c
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*
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* This file contians vfs file ops for 9P2000.
|
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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>
|
||||
*
|
||||
* 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
|
||||
*
|
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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/smp_lock.h>
|
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#include <linux/inet.h>
|
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#include <linux/version.h>
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#include <linux/list.h>
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#include <asm/uaccess.h>
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#include <linux/idr.h>
|
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|
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#include "debug.h"
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#include "v9fs.h"
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#include "9p.h"
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#include "v9fs_vfs.h"
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#include "fid.h"
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/**
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* v9fs_file_open - open a file (or directory)
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* @inode: inode to be opened
|
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* @file: file being opened
|
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*
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*/
|
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|
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int v9fs_file_open(struct inode *inode, struct file *file)
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{
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struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
|
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struct v9fs_fid *v9fid = v9fs_fid_lookup(file->f_dentry, FID_WALK);
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struct v9fs_fid *v9newfid = NULL;
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struct v9fs_fcall *fcall = NULL;
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int open_mode = 0;
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unsigned int iounit = 0;
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int newfid = -1;
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long result = -1;
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dprintk(DEBUG_VFS, "inode: %p file: %p v9fid= %p\n", inode, file,
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v9fid);
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if (!v9fid) {
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struct dentry *dentry = file->f_dentry;
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dprintk(DEBUG_ERROR, "Couldn't resolve fid from dentry\n");
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|
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/* XXX - some duplication from lookup, generalize later */
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/* basically vfs_lookup is too heavy weight */
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v9fid = v9fs_fid_lookup(file->f_dentry, FID_OP);
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if (!v9fid)
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return -EBADF;
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|
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v9fid = v9fs_fid_lookup(dentry->d_parent, FID_WALK);
|
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if (!v9fid)
|
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return -EBADF;
|
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|
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newfid = v9fs_get_idpool(&v9ses->fidpool);
|
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if (newfid < 0) {
|
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eprintk(KERN_WARNING, "newfid fails!\n");
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return -ENOSPC;
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}
|
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|
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result =
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v9fs_t_walk(v9ses, v9fid->fid, newfid,
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(char *)file->f_dentry->d_name.name, NULL);
|
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if (result < 0) {
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v9fs_put_idpool(newfid, &v9ses->fidpool);
|
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dprintk(DEBUG_ERROR, "rewalk didn't work\n");
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return -EBADF;
|
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}
|
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|
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v9fid = v9fs_fid_create(dentry);
|
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if (v9fid == NULL) {
|
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dprintk(DEBUG_ERROR, "couldn't insert\n");
|
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return -ENOMEM;
|
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}
|
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v9fid->fid = newfid;
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}
|
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|
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if (v9fid->fidcreate) {
|
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/* create case */
|
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newfid = v9fid->fid;
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iounit = v9fid->iounit;
|
||||
v9fid->fidcreate = 0;
|
||||
} else {
|
||||
if (!S_ISDIR(inode->i_mode))
|
||||
newfid = v9fid->fid;
|
||||
else {
|
||||
newfid = v9fs_get_idpool(&v9ses->fidpool);
|
||||
if (newfid < 0) {
|
||||
eprintk(KERN_WARNING, "allocation failed\n");
|
||||
return -ENOSPC;
|
||||
}
|
||||
/* This would be a somewhat critical clone */
|
||||
result =
|
||||
v9fs_t_walk(v9ses, v9fid->fid, newfid, NULL,
|
||||
&fcall);
|
||||
if (result < 0) {
|
||||
dprintk(DEBUG_ERROR, "clone error: %s\n",
|
||||
FCALL_ERROR(fcall));
|
||||
kfree(fcall);
|
||||
return result;
|
||||
}
|
||||
|
||||
v9newfid = v9fs_fid_create(file->f_dentry);
|
||||
v9newfid->fid = newfid;
|
||||
v9newfid->qid = v9fid->qid;
|
||||
v9newfid->iounit = v9fid->iounit;
|
||||
v9newfid->fidopen = 0;
|
||||
v9newfid->fidclunked = 0;
|
||||
v9newfid->v9ses = v9ses;
|
||||
v9fid = v9newfid;
|
||||
kfree(fcall);
|
||||
}
|
||||
|
||||
/* TODO: do special things for O_EXCL, O_NOFOLLOW, O_SYNC */
|
||||
/* translate open mode appropriately */
|
||||
open_mode = file->f_flags & 0x3;
|
||||
|
||||
if (file->f_flags & O_EXCL)
|
||||
open_mode |= V9FS_OEXCL;
|
||||
|
||||
if (v9ses->extended) {
|
||||
if (file->f_flags & O_TRUNC)
|
||||
open_mode |= V9FS_OTRUNC;
|
||||
|
||||
if (file->f_flags & O_APPEND)
|
||||
open_mode |= V9FS_OAPPEND;
|
||||
}
|
||||
|
||||
result = v9fs_t_open(v9ses, newfid, open_mode, &fcall);
|
||||
if (result < 0) {
|
||||
dprintk(DEBUG_ERROR,
|
||||
"open failed, open_mode 0x%x: %s\n", open_mode,
|
||||
FCALL_ERROR(fcall));
|
||||
kfree(fcall);
|
||||
return result;
|
||||
}
|
||||
|
||||
iounit = fcall->params.ropen.iounit;
|
||||
kfree(fcall);
|
||||
}
|
||||
|
||||
|
||||
file->private_data = v9fid;
|
||||
|
||||
v9fid->rdir_pos = 0;
|
||||
v9fid->rdir_fcall = NULL;
|
||||
v9fid->fidopen = 1;
|
||||
v9fid->filp = file;
|
||||
v9fid->iounit = iounit;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_file_lock - lock a file (or directory)
|
||||
* @inode: inode to be opened
|
||||
* @file: file being opened
|
||||
*
|
||||
* XXX - this looks like a local only lock, we should extend into 9P
|
||||
* by using open exclusive
|
||||
*/
|
||||
|
||||
static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
|
||||
{
|
||||
int res = 0;
|
||||
struct inode *inode = filp->f_dentry->d_inode;
|
||||
|
||||
dprintk(DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
|
||||
|
||||
/* No mandatory locks */
|
||||
if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
|
||||
return -ENOLCK;
|
||||
|
||||
if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
|
||||
filemap_fdatawrite(inode->i_mapping);
|
||||
filemap_fdatawait(inode->i_mapping);
|
||||
invalidate_inode_pages(&inode->i_data);
|
||||
}
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_read - read from a file (internal)
|
||||
* @filep: file pointer to read
|
||||
* @data: data buffer to read data into
|
||||
* @count: size of buffer
|
||||
* @offset: offset at which to read data
|
||||
*
|
||||
*/
|
||||
|
||||
static ssize_t
|
||||
v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
|
||||
{
|
||||
struct inode *inode = filp->f_dentry->d_inode;
|
||||
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
|
||||
struct v9fs_fid *v9f = filp->private_data;
|
||||
struct v9fs_fcall *fcall = NULL;
|
||||
int fid = v9f->fid;
|
||||
int rsize = 0;
|
||||
int result = 0;
|
||||
int total = 0;
|
||||
|
||||
dprintk(DEBUG_VFS, "\n");
|
||||
|
||||
rsize = v9ses->maxdata - V9FS_IOHDRSZ;
|
||||
if (v9f->iounit != 0 && rsize > v9f->iounit)
|
||||
rsize = v9f->iounit;
|
||||
|
||||
do {
|
||||
if (count < rsize)
|
||||
rsize = count;
|
||||
|
||||
result = v9fs_t_read(v9ses, fid, *offset, rsize, &fcall);
|
||||
|
||||
if (result < 0) {
|
||||
printk(KERN_ERR "9P2000: v9fs_t_read returned %d\n",
|
||||
result);
|
||||
|
||||
kfree(fcall);
|
||||
return total;
|
||||
} else
|
||||
*offset += result;
|
||||
|
||||
/* XXX - extra copy */
|
||||
memcpy(buffer, fcall->params.rread.data, result);
|
||||
count -= result;
|
||||
buffer += result;
|
||||
total += result;
|
||||
|
||||
kfree(fcall);
|
||||
|
||||
if (result < rsize)
|
||||
break;
|
||||
} while (count);
|
||||
|
||||
return total;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_file_read - read from a file
|
||||
* @filep: file pointer to read
|
||||
* @data: data buffer to read data into
|
||||
* @count: size of buffer
|
||||
* @offset: offset at which to read data
|
||||
*
|
||||
*/
|
||||
|
||||
static ssize_t
|
||||
v9fs_file_read(struct file *filp, char __user * data, size_t count,
|
||||
loff_t * offset)
|
||||
{
|
||||
int retval = -1;
|
||||
int ret = 0;
|
||||
char *buffer;
|
||||
|
||||
buffer = kmalloc(count, GFP_KERNEL);
|
||||
if (!buffer)
|
||||
return -ENOMEM;
|
||||
|
||||
retval = v9fs_read(filp, buffer, count, offset);
|
||||
if (retval > 0) {
|
||||
if ((ret = copy_to_user(data, buffer, retval)) != 0) {
|
||||
dprintk(DEBUG_ERROR, "Problem copying to user %d\n",
|
||||
ret);
|
||||
retval = ret;
|
||||
}
|
||||
}
|
||||
|
||||
kfree(buffer);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_write - write to a file
|
||||
* @filep: file pointer to write
|
||||
* @data: data buffer to write data from
|
||||
* @count: size of buffer
|
||||
* @offset: offset at which to write data
|
||||
*
|
||||
*/
|
||||
|
||||
static ssize_t
|
||||
v9fs_write(struct file *filp, char *buffer, size_t count, loff_t * offset)
|
||||
{
|
||||
struct inode *inode = filp->f_dentry->d_inode;
|
||||
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
|
||||
struct v9fs_fid *v9fid = filp->private_data;
|
||||
struct v9fs_fcall *fcall;
|
||||
int fid = v9fid->fid;
|
||||
int result = -EIO;
|
||||
int rsize = 0;
|
||||
int total = 0;
|
||||
|
||||
dprintk(DEBUG_VFS, "data %p count %d offset %x\n", buffer, (int)count,
|
||||
(int)*offset);
|
||||
rsize = v9ses->maxdata - V9FS_IOHDRSZ;
|
||||
if (v9fid->iounit != 0 && rsize > v9fid->iounit)
|
||||
rsize = v9fid->iounit;
|
||||
|
||||
dump_data(buffer, count);
|
||||
|
||||
do {
|
||||
if (count < rsize)
|
||||
rsize = count;
|
||||
|
||||
result =
|
||||
v9fs_t_write(v9ses, fid, *offset, rsize, buffer, &fcall);
|
||||
if (result < 0) {
|
||||
eprintk(KERN_ERR, "error while writing: %s(%d)\n",
|
||||
FCALL_ERROR(fcall), result);
|
||||
kfree(fcall);
|
||||
return result;
|
||||
} else
|
||||
*offset += result;
|
||||
|
||||
kfree(fcall);
|
||||
|
||||
if (result != rsize) {
|
||||
eprintk(KERN_ERR,
|
||||
"short write: v9fs_t_write returned %d\n",
|
||||
result);
|
||||
break;
|
||||
}
|
||||
|
||||
count -= result;
|
||||
buffer += result;
|
||||
total += result;
|
||||
} while (count);
|
||||
|
||||
return total;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_file_write - write to a file
|
||||
* @filep: file pointer to write
|
||||
* @data: data buffer to write data from
|
||||
* @count: size of buffer
|
||||
* @offset: offset at which to write data
|
||||
*
|
||||
*/
|
||||
|
||||
static ssize_t
|
||||
v9fs_file_write(struct file *filp, const char __user * data,
|
||||
size_t count, loff_t * offset)
|
||||
{
|
||||
int ret = -1;
|
||||
char *buffer;
|
||||
|
||||
buffer = kmalloc(count, GFP_KERNEL);
|
||||
if (buffer == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = copy_from_user(buffer, data, count);
|
||||
if (ret) {
|
||||
dprintk(DEBUG_ERROR, "Problem copying from user\n");
|
||||
ret = -EFAULT;
|
||||
} else {
|
||||
ret = v9fs_write(filp, buffer, count, offset);
|
||||
}
|
||||
|
||||
kfree(buffer);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
struct file_operations v9fs_file_operations = {
|
||||
.llseek = generic_file_llseek,
|
||||
.read = v9fs_file_read,
|
||||
.write = v9fs_file_write,
|
||||
.open = v9fs_file_open,
|
||||
.release = v9fs_dir_release,
|
||||
.lock = v9fs_file_lock,
|
||||
};
|
||||
Loading…
Reference in a new issue