mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-25 03:46:17 +00:00
2441 lines
68 KiB
C
2441 lines
68 KiB
C
/*
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* fs/cifs/file.c
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*
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* vfs operations that deal with files
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*
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* Copyright (C) International Business Machines Corp., 2002,2003
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* Author(s): Steve French (sfrench@us.ibm.com)
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library 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
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* the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/fs.h>
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#include <linux/stat.h>
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#include <linux/fcntl.h>
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#include <linux/pagemap.h>
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#include <linux/pagevec.h>
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#include <linux/smp_lock.h>
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#include <asm/div64.h>
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#include "cifsfs.h"
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#include "cifspdu.h"
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#include "cifsglob.h"
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#include "cifsproto.h"
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#include "cifs_unicode.h"
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#include "cifs_debug.h"
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#include "cifs_fs_sb.h"
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extern int cifs_readdir2(struct file *file, void *direntry, filldir_t filldir); /* BB removeme BB */
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int
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cifs_open(struct inode *inode, struct file *file)
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{
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int rc = -EACCES;
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int xid, oplock;
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struct cifs_sb_info *cifs_sb;
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struct cifsTconInfo *pTcon;
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struct cifsFileInfo *pCifsFile;
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struct cifsInodeInfo *pCifsInode;
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struct list_head * tmp;
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char *full_path = NULL;
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int desiredAccess = 0x20197;
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int disposition;
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__u16 netfid;
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FILE_ALL_INFO * buf = NULL;
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xid = GetXid();
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cifs_sb = CIFS_SB(inode->i_sb);
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pTcon = cifs_sb->tcon;
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if (file->f_flags & O_CREAT) {
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/* search inode for this file and fill in file->private_data = */
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pCifsInode = CIFS_I(file->f_dentry->d_inode);
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read_lock(&GlobalSMBSeslock);
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list_for_each(tmp, &pCifsInode->openFileList) {
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pCifsFile = list_entry(tmp,struct cifsFileInfo, flist);
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if((pCifsFile->pfile == NULL)&& (pCifsFile->pid == current->tgid)){
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/* mode set in cifs_create */
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pCifsFile->pfile = file; /* needed for writepage */
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file->private_data = pCifsFile;
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break;
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}
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}
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read_unlock(&GlobalSMBSeslock);
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if(file->private_data != NULL) {
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rc = 0;
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FreeXid(xid);
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return rc;
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} else {
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if(file->f_flags & O_EXCL)
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cERROR(1,("could not find file instance for new file %p ",file));
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}
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}
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down(&inode->i_sb->s_vfs_rename_sem);
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full_path = build_path_from_dentry(file->f_dentry);
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up(&inode->i_sb->s_vfs_rename_sem);
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if(full_path == NULL) {
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FreeXid(xid);
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return -ENOMEM;
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}
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cFYI(1, (" inode = 0x%p file flags are 0x%x for %s", inode, file->f_flags,full_path));
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if ((file->f_flags & O_ACCMODE) == O_RDONLY)
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desiredAccess = GENERIC_READ;
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else if ((file->f_flags & O_ACCMODE) == O_WRONLY)
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desiredAccess = GENERIC_WRITE;
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else if ((file->f_flags & O_ACCMODE) == O_RDWR) {
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/* GENERIC_ALL is too much permission to request */
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/* can cause unnecessary access denied on create */
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/* desiredAccess = GENERIC_ALL; */
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desiredAccess = GENERIC_READ | GENERIC_WRITE;
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}
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/*********************************************************************
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* open flag mapping table:
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*
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* POSIX Flag CIFS Disposition
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* ---------- ----------------
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* O_CREAT FILE_OPEN_IF
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* O_CREAT | O_EXCL FILE_CREATE
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* O_CREAT | O_TRUNC FILE_OVERWRITE_IF
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* O_TRUNC FILE_OVERWRITE
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* none of the above FILE_OPEN
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*
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* Note that there is not a direct match between disposition
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* FILE_SUPERSEDE (ie create whether or not file exists although
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* O_CREAT | O_TRUNC is similar but truncates the existing
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* file rather than creating a new file as FILE_SUPERSEDE does
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* (which uses the attributes / metadata passed in on open call)
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*?
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*? O_SYNC is a reasonable match to CIFS writethrough flag
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*? and the read write flags match reasonably. O_LARGEFILE
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*? is irrelevant because largefile support is always used
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*? by this client. Flags O_APPEND, O_DIRECT, O_DIRECTORY,
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* O_FASYNC, O_NOFOLLOW, O_NONBLOCK need further investigation
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*********************************************************************/
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if((file->f_flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
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disposition = FILE_CREATE;
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else if((file->f_flags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
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disposition = FILE_OVERWRITE_IF;
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else if((file->f_flags & O_CREAT) == O_CREAT)
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disposition = FILE_OPEN_IF;
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else
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disposition = FILE_OPEN;
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if (oplockEnabled)
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oplock = REQ_OPLOCK;
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else
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oplock = FALSE;
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/* BB pass O_SYNC flag through on file attributes .. BB */
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/* Also refresh inode by passing in file_info buf returned by SMBOpen
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and calling get_inode_info with returned buf (at least
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helps non-Unix server case */
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/* BB we can not do this if this is the second open of a file
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and the first handle has writebehind data, we might be
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able to simply do a filemap_fdatawrite/filemap_fdatawait first */
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buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL);
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if(buf== NULL) {
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if (full_path)
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kfree(full_path);
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FreeXid(xid);
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return -ENOMEM;
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}
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rc = CIFSSMBOpen(xid, pTcon, full_path, disposition, desiredAccess,
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CREATE_NOT_DIR, &netfid, &oplock, buf, cifs_sb->local_nls);
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if (rc) {
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cFYI(1, ("cifs_open returned 0x%x ", rc));
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cFYI(1, ("oplock: %d ", oplock));
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} else {
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file->private_data =
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kmalloc(sizeof (struct cifsFileInfo), GFP_KERNEL);
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if (file->private_data) {
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memset(file->private_data, 0, sizeof(struct cifsFileInfo));
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pCifsFile = (struct cifsFileInfo *) file->private_data;
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pCifsFile->netfid = netfid;
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pCifsFile->pid = current->tgid;
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init_MUTEX(&pCifsFile->fh_sem);
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pCifsFile->pfile = file; /* needed for writepage */
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pCifsFile->pInode = inode;
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pCifsFile->invalidHandle = FALSE;
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pCifsFile->closePend = FALSE;
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write_lock(&file->f_owner.lock);
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write_lock(&GlobalSMBSeslock);
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list_add(&pCifsFile->tlist,&pTcon->openFileList);
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pCifsInode = CIFS_I(file->f_dentry->d_inode);
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if(pCifsInode) {
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/* want handles we can use to read with first */
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/* in the list so we do not have to walk the */
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/* list to search for one in prepare_write */
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if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
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list_add_tail(&pCifsFile->flist,&pCifsInode->openFileList);
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} else {
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list_add(&pCifsFile->flist,&pCifsInode->openFileList);
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}
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write_unlock(&GlobalSMBSeslock);
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write_unlock(&file->f_owner.lock);
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if(pCifsInode->clientCanCacheRead) {
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/* we have the inode open somewhere else
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no need to discard cache data */
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} else {
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if(buf) {
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/* BB need same check in cifs_create too? */
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/* if not oplocked, invalidate inode pages if mtime
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or file size changed */
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struct timespec temp;
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temp = cifs_NTtimeToUnix(le64_to_cpu(buf->LastWriteTime));
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if(timespec_equal(&file->f_dentry->d_inode->i_mtime,&temp) &&
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(file->f_dentry->d_inode->i_size == (loff_t)le64_to_cpu(buf->EndOfFile))) {
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cFYI(1,("inode unchanged on server"));
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} else {
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if(file->f_dentry->d_inode->i_mapping) {
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/* BB no need to lock inode until after invalidate*/
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/* since namei code should already have it locked?*/
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filemap_fdatawrite(file->f_dentry->d_inode->i_mapping);
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filemap_fdatawait(file->f_dentry->d_inode->i_mapping);
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}
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cFYI(1,("invalidating remote inode since open detected it changed"));
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invalidate_remote_inode(file->f_dentry->d_inode);
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}
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}
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}
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if (pTcon->ses->capabilities & CAP_UNIX)
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rc = cifs_get_inode_info_unix(&file->f_dentry->d_inode,
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full_path, inode->i_sb,xid);
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else
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rc = cifs_get_inode_info(&file->f_dentry->d_inode,
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full_path, buf, inode->i_sb,xid);
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if((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
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pCifsInode->clientCanCacheAll = TRUE;
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pCifsInode->clientCanCacheRead = TRUE;
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cFYI(1,("Exclusive Oplock granted on inode %p",file->f_dentry->d_inode));
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} else if((oplock & 0xF) == OPLOCK_READ)
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pCifsInode->clientCanCacheRead = TRUE;
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} else {
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write_unlock(&GlobalSMBSeslock);
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write_unlock(&file->f_owner.lock);
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}
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if(oplock & CIFS_CREATE_ACTION) {
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/* time to set mode which we can not set earlier due
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to problems creating new read-only files */
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if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
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CIFSSMBUnixSetPerms(xid, pTcon, full_path, inode->i_mode,
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(__u64)-1,
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(__u64)-1,
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0 /* dev */,
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cifs_sb->local_nls);
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else {/* BB implement via Windows security descriptors */
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/* eg CIFSSMBWinSetPerms(xid,pTcon,full_path,mode,-1,-1,local_nls);*/
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/* in the meantime could set r/o dos attribute when perms are eg:
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mode & 0222 == 0 */
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}
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}
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}
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}
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if (buf)
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kfree(buf);
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if (full_path)
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kfree(full_path);
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FreeXid(xid);
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return rc;
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}
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/* Try to reaquire byte range locks that were released when session */
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/* to server was lost */
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static int cifs_relock_file(struct cifsFileInfo * cifsFile)
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{
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int rc = 0;
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/* BB list all locks open on this file and relock */
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return rc;
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}
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static int cifs_reopen_file(struct inode *inode, struct file *file, int can_flush)
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{
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int rc = -EACCES;
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int xid, oplock;
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struct cifs_sb_info *cifs_sb;
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struct cifsTconInfo *pTcon;
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struct cifsFileInfo *pCifsFile;
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struct cifsInodeInfo *pCifsInode;
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char *full_path = NULL;
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int desiredAccess = 0x20197;
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int disposition = FILE_OPEN;
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__u16 netfid;
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if(inode == NULL)
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return -EBADF;
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if (file->private_data) {
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pCifsFile = (struct cifsFileInfo *) file->private_data;
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} else
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return -EBADF;
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xid = GetXid();
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down(&pCifsFile->fh_sem);
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if(pCifsFile->invalidHandle == FALSE) {
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up(&pCifsFile->fh_sem);
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FreeXid(xid);
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return 0;
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}
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if(file->f_dentry == NULL) {
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up(&pCifsFile->fh_sem);
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cFYI(1,("failed file reopen, no valid name if dentry freed"));
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FreeXid(xid);
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return -EBADF;
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}
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cifs_sb = CIFS_SB(inode->i_sb);
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pTcon = cifs_sb->tcon;
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/* can not grab rename sem here because various ops, including
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those that already have the rename sem can end up causing writepage
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to get called and if the server was down that means we end up here,
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and we can never tell if the caller already has the rename_sem */
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full_path = build_path_from_dentry(file->f_dentry);
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if(full_path == NULL) {
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up(&pCifsFile->fh_sem);
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FreeXid(xid);
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return -ENOMEM;
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}
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cFYI(1, (" inode = 0x%p file flags are 0x%x for %s", inode, file->f_flags,full_path));
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if ((file->f_flags & O_ACCMODE) == O_RDONLY)
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desiredAccess = GENERIC_READ;
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else if ((file->f_flags & O_ACCMODE) == O_WRONLY)
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desiredAccess = GENERIC_WRITE;
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else if ((file->f_flags & O_ACCMODE) == O_RDWR) {
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/* GENERIC_ALL is too much permission to request */
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/* can cause unnecessary access denied on create */
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/* desiredAccess = GENERIC_ALL; */
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desiredAccess = GENERIC_READ | GENERIC_WRITE;
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}
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if (oplockEnabled)
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oplock = REQ_OPLOCK;
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else
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oplock = FALSE;
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/* Can not refresh inode by passing in file_info buf to be returned
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by SMBOpen and then calling get_inode_info with returned buf
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since file might have write behind data that needs to be flushed
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and server version of file size can be stale. If we
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knew for sure that inode was not dirty locally we could do this */
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/* buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL);
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if(buf==0) {
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up(&pCifsFile->fh_sem);
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if (full_path)
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kfree(full_path);
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FreeXid(xid);
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return -ENOMEM;
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}*/
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rc = CIFSSMBOpen(xid, pTcon, full_path, disposition, desiredAccess,
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CREATE_NOT_DIR, &netfid, &oplock, NULL, cifs_sb->local_nls);
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if (rc) {
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up(&pCifsFile->fh_sem);
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cFYI(1, ("cifs_open returned 0x%x ", rc));
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cFYI(1, ("oplock: %d ", oplock));
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} else {
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pCifsFile->netfid = netfid;
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pCifsFile->invalidHandle = FALSE;
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up(&pCifsFile->fh_sem);
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pCifsInode = CIFS_I(inode);
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if(pCifsInode) {
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if(can_flush) {
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filemap_fdatawrite(inode->i_mapping);
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filemap_fdatawait(inode->i_mapping);
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/* temporarily disable caching while we
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go to server to get inode info */
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pCifsInode->clientCanCacheAll = FALSE;
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pCifsInode->clientCanCacheRead = FALSE;
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if (pTcon->ses->capabilities & CAP_UNIX)
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rc = cifs_get_inode_info_unix(&inode,
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full_path, inode->i_sb,xid);
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else
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rc = cifs_get_inode_info(&inode,
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full_path, NULL, inode->i_sb,xid);
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} /* else we are writing out data to server already
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and could deadlock if we tried to flush data, and
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since we do not know if we have data that would
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invalidate the current end of file on the server
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we can not go to the server to get the new
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inod info */
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if((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
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pCifsInode->clientCanCacheAll = TRUE;
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pCifsInode->clientCanCacheRead = TRUE;
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cFYI(1,("Exclusive Oplock granted on inode %p",file->f_dentry->d_inode));
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} else if((oplock & 0xF) == OPLOCK_READ) {
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pCifsInode->clientCanCacheRead = TRUE;
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pCifsInode->clientCanCacheAll = FALSE;
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} else {
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pCifsInode->clientCanCacheRead = FALSE;
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pCifsInode->clientCanCacheAll = FALSE;
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}
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cifs_relock_file(pCifsFile);
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}
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}
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if (full_path)
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kfree(full_path);
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FreeXid(xid);
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return rc;
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}
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int
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cifs_close(struct inode *inode, struct file *file)
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{
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int rc = 0;
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int xid;
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struct cifs_sb_info *cifs_sb;
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struct cifsTconInfo *pTcon;
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struct cifsFileInfo *pSMBFile =
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(struct cifsFileInfo *) file->private_data;
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xid = GetXid();
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cifs_sb = CIFS_SB(inode->i_sb);
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pTcon = cifs_sb->tcon;
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if (pSMBFile) {
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pSMBFile->closePend = TRUE;
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write_lock(&file->f_owner.lock);
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if(pTcon) {
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/* no sense reconnecting to close a file that is
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already closed */
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if (pTcon->tidStatus != CifsNeedReconnect) {
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write_unlock(&file->f_owner.lock);
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rc = CIFSSMBClose(xid,pTcon,pSMBFile->netfid);
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write_lock(&file->f_owner.lock);
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}
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}
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list_del(&pSMBFile->flist);
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list_del(&pSMBFile->tlist);
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write_unlock(&file->f_owner.lock);
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if(pSMBFile->search_resume_name)
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kfree(pSMBFile->search_resume_name);
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kfree(file->private_data);
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file->private_data = NULL;
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} else
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rc = -EBADF;
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if(list_empty(&(CIFS_I(inode)->openFileList))) {
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cFYI(1,("closing last open instance for inode %p",inode));
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/* if the file is not open we do not know if we can cache
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info on this inode, much less write behind and read ahead */
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CIFS_I(inode)->clientCanCacheRead = FALSE;
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CIFS_I(inode)->clientCanCacheAll = FALSE;
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}
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if((rc ==0) && CIFS_I(inode)->write_behind_rc)
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rc = CIFS_I(inode)->write_behind_rc;
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FreeXid(xid);
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return rc;
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}
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|
|
int
|
|
cifs_closedir(struct inode *inode, struct file *file)
|
|
{
|
|
int rc = 0;
|
|
int xid;
|
|
struct cifsFileInfo *pCFileStruct =
|
|
(struct cifsFileInfo *) file->private_data;
|
|
char * ptmp;
|
|
|
|
cFYI(1, ("Closedir inode = 0x%p with ", inode));
|
|
|
|
xid = GetXid();
|
|
|
|
if (pCFileStruct) {
|
|
struct cifsTconInfo *pTcon;
|
|
struct cifs_sb_info * cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
cFYI(1, ("Freeing private data in close dir"));
|
|
if(pCFileStruct->srch_inf.endOfSearch == FALSE) {
|
|
pCFileStruct->invalidHandle = TRUE;
|
|
rc = CIFSFindClose(xid, pTcon, pCFileStruct->netfid);
|
|
cFYI(1,("Closing uncompleted readdir with rc %d",rc));
|
|
/* not much we can do if it fails anywway, ignore rc */
|
|
rc = 0;
|
|
}
|
|
ptmp = pCFileStruct->srch_inf.ntwrk_buf_start;
|
|
if(ptmp) {
|
|
cFYI(1,("freeing smb buf in srch struct in closedir")); /* BB removeme BB */
|
|
pCFileStruct->srch_inf.ntwrk_buf_start = NULL;
|
|
cifs_buf_release(ptmp);
|
|
}
|
|
ptmp = pCFileStruct->search_resume_name;
|
|
if(ptmp) {
|
|
cFYI(1,("freeing resume name in closedir")); /* BB removeme BB */
|
|
pCFileStruct->search_resume_name = NULL;
|
|
kfree(ptmp);
|
|
}
|
|
kfree(file->private_data);
|
|
file->private_data = NULL;
|
|
}
|
|
/* BB can we lock the filestruct while this is going on? */
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
|
|
{
|
|
int rc, xid;
|
|
__u32 lockType = LOCKING_ANDX_LARGE_FILES;
|
|
__u32 numLock = 0;
|
|
__u32 numUnlock = 0;
|
|
__u64 length;
|
|
int wait_flag = FALSE;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
length = 1 + pfLock->fl_end - pfLock->fl_start;
|
|
|
|
rc = -EACCES;
|
|
|
|
xid = GetXid();
|
|
|
|
cFYI(1,
|
|
("Lock parm: 0x%x flockflags: 0x%x flocktype: 0x%x start: %lld end: %lld",
|
|
cmd, pfLock->fl_flags, pfLock->fl_type, pfLock->fl_start,
|
|
pfLock->fl_end));
|
|
|
|
if (pfLock->fl_flags & FL_POSIX)
|
|
cFYI(1, ("Posix "));
|
|
if (pfLock->fl_flags & FL_FLOCK)
|
|
cFYI(1, ("Flock "));
|
|
if (pfLock->fl_flags & FL_SLEEP) {
|
|
cFYI(1, ("Blocking lock "));
|
|
wait_flag = TRUE;
|
|
}
|
|
if (pfLock->fl_flags & FL_ACCESS)
|
|
cFYI(1, ("Process suspended by mandatory locking - not implemented yet "));
|
|
if (pfLock->fl_flags & FL_LEASE)
|
|
cFYI(1, ("Lease on file - not implemented yet"));
|
|
if (pfLock->fl_flags & (~(FL_POSIX | FL_FLOCK | FL_SLEEP | FL_ACCESS | FL_LEASE)))
|
|
cFYI(1, ("Unknown lock flags 0x%x",pfLock->fl_flags));
|
|
|
|
if (pfLock->fl_type == F_WRLCK) {
|
|
cFYI(1, ("F_WRLCK "));
|
|
numLock = 1;
|
|
} else if (pfLock->fl_type == F_UNLCK) {
|
|
cFYI(1, ("F_UNLCK "));
|
|
numUnlock = 1;
|
|
} else if (pfLock->fl_type == F_RDLCK) {
|
|
cFYI(1, ("F_RDLCK "));
|
|
lockType |= LOCKING_ANDX_SHARED_LOCK;
|
|
numLock = 1;
|
|
} else if (pfLock->fl_type == F_EXLCK) {
|
|
cFYI(1, ("F_EXLCK "));
|
|
numLock = 1;
|
|
} else if (pfLock->fl_type == F_SHLCK) {
|
|
cFYI(1, ("F_SHLCK "));
|
|
lockType |= LOCKING_ANDX_SHARED_LOCK;
|
|
numLock = 1;
|
|
} else
|
|
cFYI(1, ("Unknown type of lock "));
|
|
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
if (file->private_data == NULL) {
|
|
FreeXid(xid);
|
|
return -EBADF;
|
|
}
|
|
|
|
if (IS_GETLK(cmd)) {
|
|
rc = CIFSSMBLock(xid, pTcon,
|
|
((struct cifsFileInfo *) file->
|
|
private_data)->netfid,
|
|
length,
|
|
pfLock->fl_start, 0, 1, lockType,
|
|
0 /* wait flag */ );
|
|
if (rc == 0) {
|
|
rc = CIFSSMBLock(xid, pTcon,
|
|
((struct cifsFileInfo *) file->
|
|
private_data)->netfid,
|
|
length,
|
|
pfLock->fl_start, 1 /* numUnlock */ ,
|
|
0 /* numLock */ , lockType,
|
|
0 /* wait flag */ );
|
|
pfLock->fl_type = F_UNLCK;
|
|
if (rc != 0)
|
|
cERROR(1,
|
|
("Error unlocking previously locked range %d during test of lock ",
|
|
rc));
|
|
rc = 0;
|
|
|
|
} else {
|
|
/* if rc == ERR_SHARING_VIOLATION ? */
|
|
rc = 0; /* do not change lock type to unlock since range in use */
|
|
}
|
|
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
rc = CIFSSMBLock(xid, pTcon,
|
|
((struct cifsFileInfo *) file->private_data)->
|
|
netfid, length,
|
|
pfLock->fl_start, numUnlock, numLock, lockType,
|
|
wait_flag);
|
|
if (rc == 0 && (pfLock->fl_flags & FL_POSIX))
|
|
posix_lock_file_wait(file, pfLock);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
ssize_t
|
|
cifs_user_write(struct file * file, const char __user * write_data,
|
|
size_t write_size, loff_t * poffset)
|
|
{
|
|
int rc = 0;
|
|
unsigned int bytes_written = 0;
|
|
unsigned int total_written;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
int xid, long_op;
|
|
struct cifsFileInfo * open_file;
|
|
|
|
if(file->f_dentry == NULL)
|
|
return -EBADF;
|
|
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
if(cifs_sb == NULL) {
|
|
return -EBADF;
|
|
}
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
/*cFYI(1,
|
|
(" write %d bytes to offset %lld of %s", write_size,
|
|
*poffset, file->f_dentry->d_name.name)); */
|
|
|
|
if (file->private_data == NULL) {
|
|
return -EBADF;
|
|
} else {
|
|
open_file = (struct cifsFileInfo *) file->private_data;
|
|
}
|
|
|
|
xid = GetXid();
|
|
if(file->f_dentry->d_inode == NULL) {
|
|
FreeXid(xid);
|
|
return -EBADF;
|
|
}
|
|
|
|
if (*poffset > file->f_dentry->d_inode->i_size)
|
|
long_op = 2; /* writes past end of file can take a long time */
|
|
else
|
|
long_op = 1;
|
|
|
|
for (total_written = 0; write_size > total_written;
|
|
total_written += bytes_written) {
|
|
rc = -EAGAIN;
|
|
while(rc == -EAGAIN) {
|
|
if(file->private_data == NULL) {
|
|
/* file has been closed on us */
|
|
FreeXid(xid);
|
|
/* if we have gotten here we have written some data
|
|
and blocked, and the file has been freed on us
|
|
while we blocked so return what we managed to write */
|
|
return total_written;
|
|
}
|
|
if(open_file->closePend) {
|
|
FreeXid(xid);
|
|
if(total_written)
|
|
return total_written;
|
|
else
|
|
return -EBADF;
|
|
}
|
|
if (open_file->invalidHandle) {
|
|
if((file->f_dentry == NULL) ||
|
|
(file->f_dentry->d_inode == NULL)) {
|
|
FreeXid(xid);
|
|
return total_written;
|
|
}
|
|
/* we could deadlock if we called
|
|
filemap_fdatawait from here so tell
|
|
reopen_file not to flush data to server now */
|
|
rc = cifs_reopen_file(file->f_dentry->d_inode,
|
|
file,FALSE);
|
|
if(rc != 0)
|
|
break;
|
|
}
|
|
|
|
rc = CIFSSMBWrite(xid, pTcon,
|
|
open_file->netfid,
|
|
write_size - total_written, *poffset,
|
|
&bytes_written,
|
|
NULL, write_data + total_written, long_op);
|
|
}
|
|
if (rc || (bytes_written == 0)) {
|
|
if (total_written)
|
|
break;
|
|
else {
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
} else
|
|
*poffset += bytes_written;
|
|
long_op = FALSE; /* subsequent writes fast - 15 seconds is plenty */
|
|
}
|
|
|
|
#ifdef CONFIG_CIFS_STATS
|
|
if(total_written > 0) {
|
|
atomic_inc(&pTcon->num_writes);
|
|
spin_lock(&pTcon->stat_lock);
|
|
pTcon->bytes_written += total_written;
|
|
spin_unlock(&pTcon->stat_lock);
|
|
}
|
|
#endif
|
|
|
|
/* since the write may have blocked check these pointers again */
|
|
if(file->f_dentry) {
|
|
if(file->f_dentry->d_inode) {
|
|
struct inode *inode = file->f_dentry->d_inode;
|
|
inode->i_ctime = inode->i_mtime =
|
|
current_fs_time(inode->i_sb);
|
|
if (total_written > 0) {
|
|
if (*poffset > file->f_dentry->d_inode->i_size)
|
|
i_size_write(file->f_dentry->d_inode, *poffset);
|
|
}
|
|
mark_inode_dirty_sync(file->f_dentry->d_inode);
|
|
}
|
|
}
|
|
FreeXid(xid);
|
|
return total_written;
|
|
}
|
|
|
|
static ssize_t
|
|
cifs_write(struct file * file, const char *write_data,
|
|
size_t write_size, loff_t * poffset)
|
|
{
|
|
int rc = 0;
|
|
unsigned int bytes_written = 0;
|
|
unsigned int total_written;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
int xid, long_op;
|
|
struct cifsFileInfo * open_file;
|
|
|
|
if(file->f_dentry == NULL)
|
|
return -EBADF;
|
|
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
if(cifs_sb == NULL) {
|
|
return -EBADF;
|
|
}
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
/*cFYI(1,
|
|
(" write %d bytes to offset %lld of %s", write_size,
|
|
*poffset, file->f_dentry->d_name.name)); */
|
|
|
|
if (file->private_data == NULL) {
|
|
return -EBADF;
|
|
} else {
|
|
open_file = (struct cifsFileInfo *) file->private_data;
|
|
}
|
|
|
|
xid = GetXid();
|
|
if(file->f_dentry->d_inode == NULL) {
|
|
FreeXid(xid);
|
|
return -EBADF;
|
|
}
|
|
|
|
if (*poffset > file->f_dentry->d_inode->i_size)
|
|
long_op = 2; /* writes past end of file can take a long time */
|
|
else
|
|
long_op = 1;
|
|
|
|
for (total_written = 0; write_size > total_written;
|
|
total_written += bytes_written) {
|
|
rc = -EAGAIN;
|
|
while(rc == -EAGAIN) {
|
|
if(file->private_data == NULL) {
|
|
/* file has been closed on us */
|
|
FreeXid(xid);
|
|
/* if we have gotten here we have written some data
|
|
and blocked, and the file has been freed on us
|
|
while we blocked so return what we managed to write */
|
|
return total_written;
|
|
}
|
|
if(open_file->closePend) {
|
|
FreeXid(xid);
|
|
if(total_written)
|
|
return total_written;
|
|
else
|
|
return -EBADF;
|
|
}
|
|
if (open_file->invalidHandle) {
|
|
if((file->f_dentry == NULL) ||
|
|
(file->f_dentry->d_inode == NULL)) {
|
|
FreeXid(xid);
|
|
return total_written;
|
|
}
|
|
/* we could deadlock if we called
|
|
filemap_fdatawait from here so tell
|
|
reopen_file not to flush data to server now */
|
|
rc = cifs_reopen_file(file->f_dentry->d_inode,
|
|
file,FALSE);
|
|
if(rc != 0)
|
|
break;
|
|
}
|
|
|
|
rc = CIFSSMBWrite(xid, pTcon,
|
|
open_file->netfid,
|
|
write_size - total_written, *poffset,
|
|
&bytes_written,
|
|
write_data + total_written, NULL, long_op);
|
|
}
|
|
if (rc || (bytes_written == 0)) {
|
|
if (total_written)
|
|
break;
|
|
else {
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
} else
|
|
*poffset += bytes_written;
|
|
long_op = FALSE; /* subsequent writes fast - 15 seconds is plenty */
|
|
}
|
|
|
|
#ifdef CONFIG_CIFS_STATS
|
|
if(total_written > 0) {
|
|
atomic_inc(&pTcon->num_writes);
|
|
spin_lock(&pTcon->stat_lock);
|
|
pTcon->bytes_written += total_written;
|
|
spin_unlock(&pTcon->stat_lock);
|
|
}
|
|
#endif
|
|
|
|
/* since the write may have blocked check these pointers again */
|
|
if(file->f_dentry) {
|
|
if(file->f_dentry->d_inode) {
|
|
file->f_dentry->d_inode->i_ctime = file->f_dentry->d_inode->i_mtime =
|
|
CURRENT_TIME;
|
|
if (total_written > 0) {
|
|
if (*poffset > file->f_dentry->d_inode->i_size)
|
|
i_size_write(file->f_dentry->d_inode, *poffset);
|
|
}
|
|
mark_inode_dirty_sync(file->f_dentry->d_inode);
|
|
}
|
|
}
|
|
FreeXid(xid);
|
|
return total_written;
|
|
}
|
|
|
|
static int
|
|
cifs_partialpagewrite(struct page *page,unsigned from, unsigned to)
|
|
{
|
|
struct address_space *mapping = page->mapping;
|
|
loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
|
|
char * write_data;
|
|
int rc = -EFAULT;
|
|
int bytes_written = 0;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
struct inode *inode;
|
|
struct cifsInodeInfo *cifsInode;
|
|
struct cifsFileInfo *open_file = NULL;
|
|
struct list_head *tmp;
|
|
struct list_head *tmp1;
|
|
|
|
if (!mapping) {
|
|
return -EFAULT;
|
|
} else if(!mapping->host) {
|
|
return -EFAULT;
|
|
}
|
|
|
|
inode = page->mapping->host;
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
offset += (loff_t)from;
|
|
write_data = kmap(page);
|
|
write_data += from;
|
|
|
|
if((to > PAGE_CACHE_SIZE) || (from > to)) {
|
|
kunmap(page);
|
|
return -EIO;
|
|
}
|
|
|
|
/* racing with truncate? */
|
|
if(offset > mapping->host->i_size) {
|
|
kunmap(page);
|
|
return 0; /* don't care */
|
|
}
|
|
|
|
/* check to make sure that we are not extending the file */
|
|
if(mapping->host->i_size - offset < (loff_t)to)
|
|
to = (unsigned)(mapping->host->i_size - offset);
|
|
|
|
|
|
cifsInode = CIFS_I(mapping->host);
|
|
read_lock(&GlobalSMBSeslock);
|
|
/* BB we should start at the end */
|
|
list_for_each_safe(tmp, tmp1, &cifsInode->openFileList) {
|
|
open_file = list_entry(tmp,struct cifsFileInfo, flist);
|
|
if(open_file->closePend)
|
|
continue;
|
|
/* We check if file is open for writing first */
|
|
if((open_file->pfile) &&
|
|
((open_file->pfile->f_flags & O_RDWR) ||
|
|
(open_file->pfile->f_flags & O_WRONLY))) {
|
|
read_unlock(&GlobalSMBSeslock);
|
|
bytes_written = cifs_write(open_file->pfile, write_data,
|
|
to-from, &offset);
|
|
read_lock(&GlobalSMBSeslock);
|
|
/* Does mm or vfs already set times? */
|
|
inode->i_atime = inode->i_mtime = current_fs_time(inode->i_sb);
|
|
if ((bytes_written > 0) && (offset)) {
|
|
rc = 0;
|
|
} else if(bytes_written < 0) {
|
|
if(rc == -EBADF) {
|
|
/* have seen a case in which
|
|
kernel seemed to have closed/freed a file
|
|
even with writes active so we might as well
|
|
see if there are other file structs to try
|
|
for the same inode before giving up */
|
|
continue;
|
|
} else
|
|
rc = bytes_written;
|
|
}
|
|
break; /* now that we found a valid file handle
|
|
and tried to write to it we are done, no
|
|
sense continuing to loop looking for another */
|
|
}
|
|
if(tmp->next == NULL) {
|
|
cFYI(1,("File instance %p removed",tmp));
|
|
break;
|
|
}
|
|
}
|
|
read_unlock(&GlobalSMBSeslock);
|
|
if(open_file == NULL) {
|
|
cFYI(1,("No writeable filehandles for inode"));
|
|
rc = -EIO;
|
|
}
|
|
|
|
kunmap(page);
|
|
return rc;
|
|
}
|
|
|
|
#if 0
|
|
static int
|
|
cifs_writepages(struct address_space *mapping, struct writeback_control *wbc)
|
|
{
|
|
int rc = -EFAULT;
|
|
int xid;
|
|
|
|
xid = GetXid();
|
|
/* call 16K write then Setpageuptodate */
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
cifs_writepage(struct page* page, struct writeback_control *wbc)
|
|
{
|
|
int rc = -EFAULT;
|
|
int xid;
|
|
|
|
xid = GetXid();
|
|
/* BB add check for wbc flags */
|
|
page_cache_get(page);
|
|
if (!PageUptodate(page)) {
|
|
cFYI(1,("ppw - page not up to date"));
|
|
}
|
|
|
|
rc = cifs_partialpagewrite(page,0,PAGE_CACHE_SIZE);
|
|
SetPageUptodate(page); /* BB add check for error and Clearuptodate? */
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
cifs_commit_write(struct file *file, struct page *page, unsigned offset,
|
|
unsigned to)
|
|
{
|
|
int xid;
|
|
int rc = 0;
|
|
struct inode *inode = page->mapping->host;
|
|
loff_t position = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
|
|
char * page_data;
|
|
|
|
xid = GetXid();
|
|
cFYI(1,("commit write for page %p up to position %lld for %d",page,position,to));
|
|
if (position > inode->i_size){
|
|
i_size_write(inode, position);
|
|
/*if (file->private_data == NULL) {
|
|
rc = -EBADF;
|
|
} else {
|
|
open_file = (struct cifsFileInfo *)file->private_data;
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
rc = -EAGAIN;
|
|
while(rc == -EAGAIN) {
|
|
if((open_file->invalidHandle) &&
|
|
(!open_file->closePend)) {
|
|
rc = cifs_reopen_file(file->f_dentry->d_inode,file);
|
|
if(rc != 0)
|
|
break;
|
|
}
|
|
if(!open_file->closePend) {
|
|
rc = CIFSSMBSetFileSize(xid, cifs_sb->tcon,
|
|
position, open_file->netfid,
|
|
open_file->pid,FALSE);
|
|
} else {
|
|
rc = -EBADF;
|
|
break;
|
|
}
|
|
}
|
|
cFYI(1,(" SetEOF (commit write) rc = %d",rc));
|
|
}*/
|
|
}
|
|
if (!PageUptodate(page)) {
|
|
position = ((loff_t)page->index << PAGE_CACHE_SHIFT) + offset;
|
|
/* can not rely on (or let) writepage write this data */
|
|
if(to < offset) {
|
|
cFYI(1,("Illegal offsets, can not copy from %d to %d",
|
|
offset,to));
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
/* this is probably better than directly calling
|
|
partialpage_write since in this function
|
|
the file handle is known which we might as well
|
|
leverage */
|
|
/* BB check if anything else missing out of ppw */
|
|
/* such as updating last write time */
|
|
page_data = kmap(page);
|
|
rc = cifs_write(file, page_data+offset,to-offset,
|
|
&position);
|
|
if(rc > 0)
|
|
rc = 0;
|
|
/* else if rc < 0 should we set writebehind rc? */
|
|
kunmap(page);
|
|
} else {
|
|
set_page_dirty(page);
|
|
}
|
|
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
cifs_fsync(struct file *file, struct dentry *dentry, int datasync)
|
|
{
|
|
int xid;
|
|
int rc = 0;
|
|
struct inode * inode = file->f_dentry->d_inode;
|
|
|
|
xid = GetXid();
|
|
|
|
cFYI(1, ("Sync file - name: %s datasync: 0x%x ",
|
|
dentry->d_name.name, datasync));
|
|
|
|
rc = filemap_fdatawrite(inode->i_mapping);
|
|
if(rc == 0)
|
|
CIFS_I(inode)->write_behind_rc = 0;
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
/* static int
|
|
cifs_sync_page(struct page *page)
|
|
{
|
|
struct address_space *mapping;
|
|
struct inode *inode;
|
|
unsigned long index = page->index;
|
|
unsigned int rpages = 0;
|
|
int rc = 0;
|
|
|
|
cFYI(1,("sync page %p",page));
|
|
mapping = page->mapping;
|
|
if (!mapping)
|
|
return 0;
|
|
inode = mapping->host;
|
|
if (!inode)
|
|
return 0;*/
|
|
|
|
/* fill in rpages then
|
|
result = cifs_pagein_inode(inode, index, rpages); *//* BB finish */
|
|
|
|
/* cFYI(1, ("rpages is %d for sync page of Index %ld ", rpages, index));
|
|
|
|
if (rc < 0)
|
|
return rc;
|
|
return 0;
|
|
} */
|
|
|
|
/*
|
|
* As file closes, flush all cached write data for this inode checking
|
|
* for write behind errors.
|
|
*
|
|
*/
|
|
int cifs_flush(struct file *file)
|
|
{
|
|
struct inode * inode = file->f_dentry->d_inode;
|
|
int rc = 0;
|
|
|
|
/* Rather than do the steps manually: */
|
|
/* lock the inode for writing */
|
|
/* loop through pages looking for write behind data (dirty pages) */
|
|
/* coalesce into contiguous 16K (or smaller) chunks to write to server */
|
|
/* send to server (prefer in parallel) */
|
|
/* deal with writebehind errors */
|
|
/* unlock inode for writing */
|
|
/* filemapfdatawrite appears easier for the time being */
|
|
|
|
rc = filemap_fdatawrite(inode->i_mapping);
|
|
if(rc == 0) /* reset wb rc if we were able to write out dirty pages */
|
|
CIFS_I(inode)->write_behind_rc = 0;
|
|
|
|
cFYI(1,("Flush inode %p file %p rc %d",inode,file,rc));
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
ssize_t
|
|
cifs_user_read(struct file * file, char __user *read_data, size_t read_size,
|
|
loff_t * poffset)
|
|
{
|
|
int rc = -EACCES;
|
|
unsigned int bytes_read = 0;
|
|
unsigned int total_read = 0;
|
|
unsigned int current_read_size;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
int xid;
|
|
struct cifsFileInfo * open_file;
|
|
char * smb_read_data;
|
|
char __user * current_offset;
|
|
struct smb_com_read_rsp * pSMBr;
|
|
|
|
xid = GetXid();
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
if (file->private_data == NULL) {
|
|
FreeXid(xid);
|
|
return -EBADF;
|
|
}
|
|
open_file = (struct cifsFileInfo *)file->private_data;
|
|
|
|
if((file->f_flags & O_ACCMODE) == O_WRONLY) {
|
|
cFYI(1,("attempting read on write only file instance"));
|
|
}
|
|
|
|
for (total_read = 0,current_offset=read_data; read_size > total_read;
|
|
total_read += bytes_read,current_offset+=bytes_read) {
|
|
current_read_size = min_t(const int,read_size - total_read,cifs_sb->rsize);
|
|
rc = -EAGAIN;
|
|
smb_read_data = NULL;
|
|
while(rc == -EAGAIN) {
|
|
if ((open_file->invalidHandle) && (!open_file->closePend)) {
|
|
rc = cifs_reopen_file(file->f_dentry->d_inode,
|
|
file,TRUE);
|
|
if(rc != 0)
|
|
break;
|
|
}
|
|
|
|
rc = CIFSSMBRead(xid, pTcon,
|
|
open_file->netfid,
|
|
current_read_size, *poffset,
|
|
&bytes_read, &smb_read_data);
|
|
|
|
pSMBr = (struct smb_com_read_rsp *)smb_read_data;
|
|
copy_to_user(current_offset,smb_read_data + 4/* RFC1001 hdr*/
|
|
+ le16_to_cpu(pSMBr->DataOffset), bytes_read);
|
|
if(smb_read_data) {
|
|
cifs_buf_release(smb_read_data);
|
|
smb_read_data = NULL;
|
|
}
|
|
}
|
|
if (rc || (bytes_read == 0)) {
|
|
if (total_read) {
|
|
break;
|
|
} else {
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
} else {
|
|
#ifdef CONFIG_CIFS_STATS
|
|
atomic_inc(&pTcon->num_reads);
|
|
spin_lock(&pTcon->stat_lock);
|
|
pTcon->bytes_read += total_read;
|
|
spin_unlock(&pTcon->stat_lock);
|
|
#endif
|
|
*poffset += bytes_read;
|
|
}
|
|
}
|
|
FreeXid(xid);
|
|
return total_read;
|
|
}
|
|
|
|
static ssize_t
|
|
cifs_read(struct file * file, char *read_data, size_t read_size,
|
|
loff_t * poffset)
|
|
{
|
|
int rc = -EACCES;
|
|
unsigned int bytes_read = 0;
|
|
unsigned int total_read;
|
|
unsigned int current_read_size;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
int xid;
|
|
char * current_offset;
|
|
struct cifsFileInfo * open_file;
|
|
|
|
xid = GetXid();
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
if (file->private_data == NULL) {
|
|
FreeXid(xid);
|
|
return -EBADF;
|
|
}
|
|
open_file = (struct cifsFileInfo *)file->private_data;
|
|
|
|
if((file->f_flags & O_ACCMODE) == O_WRONLY) {
|
|
cFYI(1,("attempting read on write only file instance"));
|
|
}
|
|
|
|
for (total_read = 0,current_offset=read_data; read_size > total_read;
|
|
total_read += bytes_read,current_offset+=bytes_read) {
|
|
current_read_size = min_t(const int,read_size - total_read,cifs_sb->rsize);
|
|
rc = -EAGAIN;
|
|
while(rc == -EAGAIN) {
|
|
if ((open_file->invalidHandle) && (!open_file->closePend)) {
|
|
rc = cifs_reopen_file(file->f_dentry->d_inode,
|
|
file,TRUE);
|
|
if(rc != 0)
|
|
break;
|
|
}
|
|
|
|
rc = CIFSSMBRead(xid, pTcon,
|
|
open_file->netfid,
|
|
current_read_size, *poffset,
|
|
&bytes_read, ¤t_offset);
|
|
}
|
|
if (rc || (bytes_read == 0)) {
|
|
if (total_read) {
|
|
break;
|
|
} else {
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
} else {
|
|
#ifdef CONFIG_CIFS_STATS
|
|
atomic_inc(&pTcon->num_reads);
|
|
spin_lock(&pTcon->stat_lock);
|
|
pTcon->bytes_read += total_read;
|
|
spin_unlock(&pTcon->stat_lock);
|
|
#endif
|
|
*poffset += bytes_read;
|
|
}
|
|
}
|
|
FreeXid(xid);
|
|
return total_read;
|
|
}
|
|
|
|
int cifs_file_mmap(struct file * file, struct vm_area_struct * vma)
|
|
{
|
|
struct dentry * dentry = file->f_dentry;
|
|
int rc, xid;
|
|
|
|
#ifdef CIFS_EXPERIMENTAL /* BB fixme reenable when cifs_read_wrapper fixed */
|
|
if(dentry->d_sb) {
|
|
struct cifs_sb_info *cifs_sb;
|
|
cifs_sb = CIFS_SB(sb);
|
|
if(cifs_sb != NULL) {
|
|
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
|
|
return -ENODEV
|
|
}
|
|
}
|
|
#endif /* CIFS_EXPERIMENTAL */
|
|
|
|
xid = GetXid();
|
|
rc = cifs_revalidate(dentry);
|
|
if (rc) {
|
|
cFYI(1,("Validation prior to mmap failed, error=%d", rc));
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
rc = generic_file_mmap(file, vma);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
static void cifs_copy_cache_pages(struct address_space *mapping,
|
|
struct list_head *pages, int bytes_read,
|
|
char *data,struct pagevec * plru_pvec)
|
|
{
|
|
struct page *page;
|
|
char * target;
|
|
|
|
while (bytes_read > 0) {
|
|
if(list_empty(pages))
|
|
break;
|
|
|
|
page = list_entry(pages->prev, struct page, lru);
|
|
list_del(&page->lru);
|
|
|
|
if (add_to_page_cache(page, mapping, page->index, GFP_KERNEL)) {
|
|
page_cache_release(page);
|
|
cFYI(1,("Add page cache failed"));
|
|
continue;
|
|
}
|
|
|
|
target = kmap_atomic(page,KM_USER0);
|
|
|
|
if(PAGE_CACHE_SIZE > bytes_read) {
|
|
memcpy(target,data,bytes_read);
|
|
/* zero the tail end of this partial page */
|
|
memset(target+bytes_read,0,PAGE_CACHE_SIZE-bytes_read);
|
|
bytes_read = 0;
|
|
} else {
|
|
memcpy(target,data,PAGE_CACHE_SIZE);
|
|
bytes_read -= PAGE_CACHE_SIZE;
|
|
}
|
|
kunmap_atomic(target,KM_USER0);
|
|
|
|
flush_dcache_page(page);
|
|
SetPageUptodate(page);
|
|
unlock_page(page);
|
|
if (!pagevec_add(plru_pvec, page))
|
|
__pagevec_lru_add(plru_pvec);
|
|
data += PAGE_CACHE_SIZE;
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static int
|
|
cifs_readpages(struct file *file, struct address_space *mapping,
|
|
struct list_head *page_list, unsigned num_pages)
|
|
{
|
|
int rc = -EACCES;
|
|
int xid;
|
|
loff_t offset;
|
|
struct page * page;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
int bytes_read = 0;
|
|
unsigned int read_size,i;
|
|
char * smb_read_data = NULL;
|
|
struct smb_com_read_rsp * pSMBr;
|
|
struct pagevec lru_pvec;
|
|
struct cifsFileInfo * open_file;
|
|
|
|
xid = GetXid();
|
|
if (file->private_data == NULL) {
|
|
FreeXid(xid);
|
|
return -EBADF;
|
|
}
|
|
open_file = (struct cifsFileInfo *)file->private_data;
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
pagevec_init(&lru_pvec, 0);
|
|
|
|
for(i = 0;i<num_pages;) {
|
|
unsigned contig_pages;
|
|
struct page * tmp_page;
|
|
unsigned long expected_index;
|
|
|
|
if(list_empty(page_list)) {
|
|
break;
|
|
}
|
|
page = list_entry(page_list->prev, struct page, lru);
|
|
offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
|
|
|
|
/* count adjacent pages that we will read into */
|
|
contig_pages = 0;
|
|
expected_index = list_entry(page_list->prev,struct page,lru)->index;
|
|
list_for_each_entry_reverse(tmp_page,page_list,lru) {
|
|
if(tmp_page->index == expected_index) {
|
|
contig_pages++;
|
|
expected_index++;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
if(contig_pages + i > num_pages) {
|
|
contig_pages = num_pages - i;
|
|
}
|
|
|
|
/* for reads over a certain size could initiate async read ahead */
|
|
|
|
read_size = contig_pages * PAGE_CACHE_SIZE;
|
|
/* Read size needs to be in multiples of one page */
|
|
read_size = min_t(const unsigned int,read_size,cifs_sb->rsize & PAGE_CACHE_MASK);
|
|
|
|
rc = -EAGAIN;
|
|
while(rc == -EAGAIN) {
|
|
if ((open_file->invalidHandle) && (!open_file->closePend)) {
|
|
rc = cifs_reopen_file(file->f_dentry->d_inode,
|
|
file, TRUE);
|
|
if(rc != 0)
|
|
break;
|
|
}
|
|
|
|
rc = CIFSSMBRead(xid, pTcon,
|
|
open_file->netfid,
|
|
read_size, offset,
|
|
&bytes_read, &smb_read_data);
|
|
/* BB need to check return code here */
|
|
if(rc== -EAGAIN) {
|
|
if(smb_read_data) {
|
|
cifs_buf_release(smb_read_data);
|
|
smb_read_data = NULL;
|
|
}
|
|
}
|
|
}
|
|
if ((rc < 0) || (smb_read_data == NULL)) {
|
|
cFYI(1,("Read error in readpages: %d",rc));
|
|
/* clean up remaing pages off list */
|
|
while (!list_empty(page_list) && (i < num_pages)) {
|
|
page = list_entry(page_list->prev, struct page, lru);
|
|
list_del(&page->lru);
|
|
page_cache_release(page);
|
|
}
|
|
break;
|
|
} else if (bytes_read > 0) {
|
|
pSMBr = (struct smb_com_read_rsp *)smb_read_data;
|
|
cifs_copy_cache_pages(mapping, page_list, bytes_read,
|
|
smb_read_data + 4 /* RFC1001 hdr */ +
|
|
le16_to_cpu(pSMBr->DataOffset), &lru_pvec);
|
|
|
|
i += bytes_read >> PAGE_CACHE_SHIFT;
|
|
#ifdef CONFIG_CIFS_STATS
|
|
atomic_inc(&pTcon->num_reads);
|
|
spin_lock(&pTcon->stat_lock);
|
|
pTcon->bytes_read += bytes_read;
|
|
spin_unlock(&pTcon->stat_lock);
|
|
#endif
|
|
if((int)(bytes_read & PAGE_CACHE_MASK) != bytes_read) {
|
|
i++; /* account for partial page */
|
|
|
|
/* server copy of file can have smaller size than client */
|
|
/* BB do we need to verify this common case ? this case is ok -
|
|
if we are at server EOF we will hit it on next read */
|
|
|
|
/* while(!list_empty(page_list) && (i < num_pages)) {
|
|
page = list_entry(page_list->prev,struct page, list);
|
|
list_del(&page->list);
|
|
page_cache_release(page);
|
|
}
|
|
break; */
|
|
}
|
|
} else {
|
|
cFYI(1,("No bytes read (%d) at offset %lld . Cleaning remaining pages from readahead list",bytes_read,offset));
|
|
/* BB turn off caching and do new lookup on file size at server? */
|
|
while (!list_empty(page_list) && (i < num_pages)) {
|
|
page = list_entry(page_list->prev, struct page, lru);
|
|
list_del(&page->lru);
|
|
page_cache_release(page); /* BB removeme - replace with zero of page? */
|
|
}
|
|
break;
|
|
}
|
|
if(smb_read_data) {
|
|
cifs_buf_release(smb_read_data);
|
|
smb_read_data = NULL;
|
|
}
|
|
bytes_read = 0;
|
|
}
|
|
|
|
pagevec_lru_add(&lru_pvec);
|
|
|
|
/* need to free smb_read_data buf before exit */
|
|
if(smb_read_data) {
|
|
cifs_buf_release(smb_read_data);
|
|
smb_read_data = NULL;
|
|
}
|
|
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
static int cifs_readpage_worker(struct file *file, struct page *page, loff_t * poffset)
|
|
{
|
|
char * read_data;
|
|
int rc;
|
|
|
|
page_cache_get(page);
|
|
read_data = kmap(page);
|
|
/* for reads over a certain size could initiate async read ahead */
|
|
|
|
rc = cifs_read(file, read_data, PAGE_CACHE_SIZE, poffset);
|
|
|
|
if (rc < 0)
|
|
goto io_error;
|
|
else {
|
|
cFYI(1,("Bytes read %d ",rc));
|
|
}
|
|
|
|
file->f_dentry->d_inode->i_atime =
|
|
current_fs_time(file->f_dentry->d_inode->i_sb);
|
|
|
|
if(PAGE_CACHE_SIZE > rc) {
|
|
memset(read_data+rc, 0, PAGE_CACHE_SIZE - rc);
|
|
}
|
|
flush_dcache_page(page);
|
|
SetPageUptodate(page);
|
|
rc = 0;
|
|
|
|
io_error:
|
|
kunmap(page);
|
|
page_cache_release(page);
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
cifs_readpage(struct file *file, struct page *page)
|
|
{
|
|
loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
|
|
int rc = -EACCES;
|
|
int xid;
|
|
|
|
xid = GetXid();
|
|
|
|
if (file->private_data == NULL) {
|
|
FreeXid(xid);
|
|
return -EBADF;
|
|
}
|
|
|
|
cFYI(1,("readpage %p at offset %d 0x%x\n",page,(int)offset,(int)offset));
|
|
|
|
rc = cifs_readpage_worker(file,page,&offset);
|
|
|
|
unlock_page(page);
|
|
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
/* We do not want to update the file size from server for inodes
|
|
open for write - to avoid races with writepage extending
|
|
the file - in the future we could consider allowing
|
|
refreshing the inode only on increases in the file size
|
|
but this is tricky to do without racing with writebehind
|
|
page caching in the current Linux kernel design */
|
|
|
|
int is_size_safe_to_change(struct cifsInodeInfo * cifsInode)
|
|
{
|
|
struct list_head *tmp;
|
|
struct list_head *tmp1;
|
|
struct cifsFileInfo *open_file = NULL;
|
|
int rc = TRUE;
|
|
|
|
if(cifsInode == NULL)
|
|
return rc;
|
|
|
|
read_lock(&GlobalSMBSeslock);
|
|
list_for_each_safe(tmp, tmp1, &cifsInode->openFileList) {
|
|
open_file = list_entry(tmp,struct cifsFileInfo, flist);
|
|
if(open_file == NULL)
|
|
break;
|
|
if(open_file->closePend)
|
|
continue;
|
|
/* We check if file is open for writing,
|
|
BB we could supplement this with a check to see if file size
|
|
changes have been flushed to server - ie inode metadata dirty */
|
|
if((open_file->pfile) &&
|
|
((open_file->pfile->f_flags & O_RDWR) ||
|
|
(open_file->pfile->f_flags & O_WRONLY))) {
|
|
rc = FALSE;
|
|
break;
|
|
}
|
|
if(tmp->next == NULL) {
|
|
cFYI(1,("File instance %p removed",tmp));
|
|
break;
|
|
}
|
|
}
|
|
read_unlock(&GlobalSMBSeslock);
|
|
return rc;
|
|
}
|
|
|
|
|
|
void
|
|
fill_in_inode(struct inode *tmp_inode,
|
|
FILE_DIRECTORY_INFO * pfindData, int *pobject_type)
|
|
{
|
|
struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
|
|
__u32 attr = le32_to_cpu(pfindData->ExtFileAttributes);
|
|
__u64 allocation_size = le64_to_cpu(pfindData->AllocationSize);
|
|
__u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
|
|
|
|
cifsInfo->cifsAttrs = attr;
|
|
cifsInfo->time = jiffies;
|
|
|
|
/* Linux can not store file creation time unfortunately so ignore it */
|
|
tmp_inode->i_atime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
|
|
tmp_inode->i_mtime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
|
|
tmp_inode->i_ctime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
|
|
/* treat dos attribute of read-only as read-only mode bit e.g. 555? */
|
|
/* 2767 perms - indicate mandatory locking */
|
|
/* BB fill in uid and gid here? with help from winbind?
|
|
or retrieve from NTFS stream extended attribute */
|
|
if(atomic_read(&cifsInfo->inUse) == 0) {
|
|
tmp_inode->i_uid = cifs_sb->mnt_uid;
|
|
tmp_inode->i_gid = cifs_sb->mnt_gid;
|
|
/* set default mode. will override for dirs below */
|
|
tmp_inode->i_mode = cifs_sb->mnt_file_mode;
|
|
}
|
|
|
|
cFYI(0,
|
|
("CIFS FFIRST: Attributes came in as 0x%x",
|
|
attr));
|
|
if (attr & ATTR_DIRECTORY) {
|
|
*pobject_type = DT_DIR;
|
|
/* override default perms since we do not lock dirs */
|
|
if(atomic_read(&cifsInfo->inUse) == 0) {
|
|
tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
|
|
}
|
|
tmp_inode->i_mode |= S_IFDIR;
|
|
/* we no longer mark these because we could not follow them */
|
|
/* } else if (attr & ATTR_REPARSE) {
|
|
*pobject_type = DT_LNK;
|
|
tmp_inode->i_mode |= S_IFLNK;*/
|
|
} else {
|
|
*pobject_type = DT_REG;
|
|
tmp_inode->i_mode |= S_IFREG;
|
|
if(attr & ATTR_READONLY)
|
|
tmp_inode->i_mode &= ~(S_IWUGO);
|
|
}/* could add code here - to validate if device or weird share type? */
|
|
|
|
/* can not fill in nlink here as in qpathinfo version and Unx search */
|
|
if(atomic_read(&cifsInfo->inUse) == 0) {
|
|
atomic_set(&cifsInfo->inUse,1);
|
|
}
|
|
|
|
if(is_size_safe_to_change(cifsInfo)) {
|
|
/* can not safely change the file size here if the
|
|
client is writing to it due to potential races */
|
|
i_size_write(tmp_inode,end_of_file);
|
|
|
|
/* 512 bytes (2**9) is the fake blocksize that must be used */
|
|
/* for this calculation, even though the reported blocksize is larger */
|
|
tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
|
|
}
|
|
|
|
if (allocation_size < end_of_file)
|
|
cFYI(1, ("Possible sparse file: allocation size less than end of file "));
|
|
cFYI(1,
|
|
("File Size %ld and blocks %ld and blocksize %ld",
|
|
(unsigned long) tmp_inode->i_size, tmp_inode->i_blocks,
|
|
tmp_inode->i_blksize));
|
|
if (S_ISREG(tmp_inode->i_mode)) {
|
|
cFYI(1, (" File inode "));
|
|
tmp_inode->i_op = &cifs_file_inode_ops;
|
|
tmp_inode->i_fop = &cifs_file_ops;
|
|
tmp_inode->i_data.a_ops = &cifs_addr_ops;
|
|
} else if (S_ISDIR(tmp_inode->i_mode)) {
|
|
cFYI(1, (" Directory inode"));
|
|
tmp_inode->i_op = &cifs_dir_inode_ops;
|
|
tmp_inode->i_fop = &cifs_dir_ops;
|
|
} else if (S_ISLNK(tmp_inode->i_mode)) {
|
|
cFYI(1, (" Symbolic Link inode "));
|
|
tmp_inode->i_op = &cifs_symlink_inode_ops;
|
|
} else {
|
|
cFYI(1, (" Init special inode "));
|
|
init_special_inode(tmp_inode, tmp_inode->i_mode,
|
|
tmp_inode->i_rdev);
|
|
}
|
|
}
|
|
|
|
void
|
|
unix_fill_in_inode(struct inode *tmp_inode,
|
|
FILE_UNIX_INFO * pfindData, int *pobject_type)
|
|
{
|
|
struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
|
|
__u32 type = le32_to_cpu(pfindData->Type);
|
|
__u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
|
|
__u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
|
|
cifsInfo->time = jiffies;
|
|
atomic_inc(&cifsInfo->inUse);
|
|
|
|
tmp_inode->i_atime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
|
|
tmp_inode->i_mtime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
|
|
tmp_inode->i_ctime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
|
|
|
|
tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
|
|
if (type == UNIX_FILE) {
|
|
*pobject_type = DT_REG;
|
|
tmp_inode->i_mode |= S_IFREG;
|
|
} else if (type == UNIX_SYMLINK) {
|
|
*pobject_type = DT_LNK;
|
|
tmp_inode->i_mode |= S_IFLNK;
|
|
} else if (type == UNIX_DIR) {
|
|
*pobject_type = DT_DIR;
|
|
tmp_inode->i_mode |= S_IFDIR;
|
|
} else if (type == UNIX_CHARDEV) {
|
|
*pobject_type = DT_CHR;
|
|
tmp_inode->i_mode |= S_IFCHR;
|
|
tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
|
|
le64_to_cpu(pfindData->DevMinor) & MINORMASK);
|
|
} else if (type == UNIX_BLOCKDEV) {
|
|
*pobject_type = DT_BLK;
|
|
tmp_inode->i_mode |= S_IFBLK;
|
|
tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
|
|
le64_to_cpu(pfindData->DevMinor) & MINORMASK);
|
|
} else if (type == UNIX_FIFO) {
|
|
*pobject_type = DT_FIFO;
|
|
tmp_inode->i_mode |= S_IFIFO;
|
|
} else if (type == UNIX_SOCKET) {
|
|
*pobject_type = DT_SOCK;
|
|
tmp_inode->i_mode |= S_IFSOCK;
|
|
}
|
|
|
|
tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
|
|
tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
|
|
tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
|
|
|
|
|
|
if(is_size_safe_to_change(cifsInfo)) {
|
|
/* can not safely change the file size here if the
|
|
client is writing to it due to potential races */
|
|
i_size_write(tmp_inode,end_of_file);
|
|
|
|
/* 512 bytes (2**9) is the fake blocksize that must be used */
|
|
/* for this calculation, not the real blocksize */
|
|
tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
|
|
}
|
|
|
|
if (S_ISREG(tmp_inode->i_mode)) {
|
|
cFYI(1, ("File inode"));
|
|
tmp_inode->i_op = &cifs_file_inode_ops;
|
|
tmp_inode->i_fop = &cifs_file_ops;
|
|
tmp_inode->i_data.a_ops = &cifs_addr_ops;
|
|
} else if (S_ISDIR(tmp_inode->i_mode)) {
|
|
cFYI(1, ("Directory inode"));
|
|
tmp_inode->i_op = &cifs_dir_inode_ops;
|
|
tmp_inode->i_fop = &cifs_dir_ops;
|
|
} else if (S_ISLNK(tmp_inode->i_mode)) {
|
|
cFYI(1, ("Symbolic Link inode"));
|
|
tmp_inode->i_op = &cifs_symlink_inode_ops;
|
|
/* tmp_inode->i_fop = *//* do not need to set to anything */
|
|
} else {
|
|
cFYI(1, ("Special inode"));
|
|
init_special_inode(tmp_inode, tmp_inode->i_mode,
|
|
tmp_inode->i_rdev);
|
|
}
|
|
}
|
|
|
|
/* Returns one if new inode created (which therefore needs to be hashed) */
|
|
/* Might check in the future if inode number changed so we can rehash inode */
|
|
int
|
|
construct_dentry(struct qstr *qstring, struct file *file,
|
|
struct inode **ptmp_inode, struct dentry **pnew_dentry)
|
|
{
|
|
struct dentry *tmp_dentry;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
int rc = 0;
|
|
|
|
cFYI(1, ("For %s ", qstring->name));
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
qstring->hash = full_name_hash(qstring->name, qstring->len);
|
|
tmp_dentry = d_lookup(file->f_dentry, qstring);
|
|
if (tmp_dentry) {
|
|
cFYI(0, (" existing dentry with inode 0x%p", tmp_dentry->d_inode));
|
|
*ptmp_inode = tmp_dentry->d_inode;
|
|
/* BB overwrite the old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len ?? */
|
|
if(*ptmp_inode == NULL) {
|
|
*ptmp_inode = new_inode(file->f_dentry->d_sb);
|
|
if(*ptmp_inode == NULL)
|
|
return rc;
|
|
rc = 1;
|
|
d_instantiate(tmp_dentry, *ptmp_inode);
|
|
}
|
|
} else {
|
|
tmp_dentry = d_alloc(file->f_dentry, qstring);
|
|
if(tmp_dentry == NULL) {
|
|
cERROR(1,("Failed allocating dentry"));
|
|
*ptmp_inode = NULL;
|
|
return rc;
|
|
}
|
|
|
|
*ptmp_inode = new_inode(file->f_dentry->d_sb);
|
|
tmp_dentry->d_op = &cifs_dentry_ops;
|
|
if(*ptmp_inode == NULL)
|
|
return rc;
|
|
rc = 1;
|
|
d_instantiate(tmp_dentry, *ptmp_inode);
|
|
d_rehash(tmp_dentry);
|
|
}
|
|
|
|
tmp_dentry->d_time = jiffies;
|
|
*pnew_dentry = tmp_dentry;
|
|
return rc;
|
|
}
|
|
|
|
static void reset_resume_key(struct file * dir_file,
|
|
unsigned char * filename,
|
|
unsigned int len,int Unicode,struct nls_table * nls_tab) {
|
|
struct cifsFileInfo *cifsFile;
|
|
|
|
cifsFile = (struct cifsFileInfo *)dir_file->private_data;
|
|
if(cifsFile == NULL)
|
|
return;
|
|
if(cifsFile->search_resume_name) {
|
|
kfree(cifsFile->search_resume_name);
|
|
}
|
|
|
|
if(Unicode)
|
|
len *= 2;
|
|
cifsFile->resume_name_length = len;
|
|
|
|
cifsFile->search_resume_name =
|
|
kmalloc(cifsFile->resume_name_length, GFP_KERNEL);
|
|
|
|
if(cifsFile->search_resume_name == NULL) {
|
|
cERROR(1,("failed new resume key allocate, length %d",
|
|
cifsFile->resume_name_length));
|
|
return;
|
|
}
|
|
if(Unicode)
|
|
cifs_strtoUCS((wchar_t *) cifsFile->search_resume_name,
|
|
filename, len, nls_tab);
|
|
else
|
|
memcpy(cifsFile->search_resume_name, filename,
|
|
cifsFile->resume_name_length);
|
|
cFYI(1,("Reset resume key to: %s with len %d",filename,len));
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
cifs_filldir(struct qstr *pqstring, FILE_DIRECTORY_INFO * pfindData,
|
|
struct file *file, filldir_t filldir, void *direntry)
|
|
{
|
|
struct inode *tmp_inode;
|
|
struct dentry *tmp_dentry;
|
|
int object_type,rc;
|
|
|
|
pqstring->name = pfindData->FileName;
|
|
/* pqstring->len is already set by caller */
|
|
|
|
rc = construct_dentry(pqstring, file, &tmp_inode, &tmp_dentry);
|
|
if((tmp_inode == NULL) || (tmp_dentry == NULL)) {
|
|
return -ENOMEM;
|
|
}
|
|
fill_in_inode(tmp_inode, pfindData, &object_type);
|
|
if(rc) {
|
|
/* We have no reliable way to get inode numbers
|
|
from servers w/o Unix extensions yet so we can not set
|
|
i_ino from pfindData yet */
|
|
|
|
/* new inode created, let us hash it */
|
|
insert_inode_hash(tmp_inode);
|
|
} /* else if inode number changed do we rehash it? */
|
|
rc = filldir(direntry, pfindData->FileName, pqstring->len, file->f_pos,
|
|
tmp_inode->i_ino, object_type);
|
|
if(rc) {
|
|
/* due to readdir error we need to recalculate resume
|
|
key so next readdir will restart on right entry */
|
|
cFYI(1,("Error %d on filldir of %s",rc ,pfindData->FileName));
|
|
}
|
|
dput(tmp_dentry);
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
cifs_filldir_unix(struct qstr *pqstring,
|
|
FILE_UNIX_INFO * pUnixFindData, struct file *file,
|
|
filldir_t filldir, void *direntry)
|
|
{
|
|
struct inode *tmp_inode;
|
|
struct dentry *tmp_dentry;
|
|
int object_type, rc;
|
|
|
|
pqstring->name = pUnixFindData->FileName;
|
|
pqstring->len = strnlen(pUnixFindData->FileName, MAX_PATHCONF);
|
|
|
|
rc = construct_dentry(pqstring, file, &tmp_inode, &tmp_dentry);
|
|
if((tmp_inode == NULL) || (tmp_dentry == NULL)) {
|
|
return -ENOMEM;
|
|
}
|
|
if(rc) {
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
|
|
|
|
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
|
|
tmp_inode->i_ino =
|
|
(unsigned long)pUnixFindData->UniqueId;
|
|
}
|
|
insert_inode_hash(tmp_inode);
|
|
} /* else if i_ino has changed should we rehash it? */
|
|
unix_fill_in_inode(tmp_inode, pUnixFindData, &object_type);
|
|
rc = filldir(direntry, pUnixFindData->FileName, pqstring->len,
|
|
file->f_pos, tmp_inode->i_ino, object_type);
|
|
if(rc) {
|
|
/* due to readdir error we need to recalculate resume
|
|
key so next readdir will restart on right entry */
|
|
cFYI(1,("Error %d on filldir of %s",rc ,pUnixFindData->FileName));
|
|
}
|
|
dput(tmp_dentry);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
|
|
{
|
|
int rc = 0;
|
|
int xid;
|
|
int Unicode = FALSE;
|
|
int UnixSearch = FALSE;
|
|
unsigned int bufsize, i;
|
|
__u16 searchHandle;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
struct cifsFileInfo *cifsFile = NULL;
|
|
char *full_path = NULL;
|
|
char *data;
|
|
struct qstr qstring;
|
|
T2_FFIRST_RSP_PARMS findParms;
|
|
T2_FNEXT_RSP_PARMS findNextParms;
|
|
FILE_DIRECTORY_INFO *pfindData;
|
|
FILE_DIRECTORY_INFO *lastFindData;
|
|
FILE_UNIX_INFO *pfindDataUnix;
|
|
|
|
|
|
/* BB removeme begin */
|
|
if(!experimEnabled)
|
|
return cifs_readdir2(file,direntry,filldir);
|
|
/* BB removeme end */
|
|
|
|
|
|
xid = GetXid();
|
|
|
|
if(file->f_dentry == NULL) {
|
|
rc = -EIO;
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
bufsize = pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE;
|
|
if(bufsize > CIFSMaxBufSize) {
|
|
rc = -EIO;
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
data = kmalloc(bufsize, GFP_KERNEL);
|
|
pfindData = (FILE_DIRECTORY_INFO *) data;
|
|
if(data == NULL) {
|
|
rc = -ENOMEM;
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
down(&file->f_dentry->d_sb->s_vfs_rename_sem);
|
|
full_path = build_wildcard_path_from_dentry(file->f_dentry);
|
|
up(&file->f_dentry->d_sb->s_vfs_rename_sem);
|
|
|
|
if(full_path == NULL) {
|
|
kfree(data);
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
cFYI(1, ("Full path: %s start at: %lld ", full_path, file->f_pos));
|
|
|
|
switch ((int) file->f_pos) {
|
|
case 0:
|
|
if (filldir(direntry, ".", 1, file->f_pos,
|
|
file->f_dentry->d_inode->i_ino, DT_DIR) < 0) {
|
|
cERROR(1, ("Filldir for current dir failed "));
|
|
break;
|
|
}
|
|
file->f_pos++;
|
|
/* fallthrough */
|
|
case 1:
|
|
if (filldir(direntry, "..", 2, file->f_pos,
|
|
file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
|
|
cERROR(1, ("Filldir for parent dir failed "));
|
|
break;
|
|
}
|
|
file->f_pos++;
|
|
/* fallthrough */
|
|
case 2:
|
|
if (file->private_data != NULL) {
|
|
cifsFile =
|
|
(struct cifsFileInfo *) file->private_data;
|
|
if (cifsFile->srch_inf.endOfSearch) {
|
|
if(cifsFile->srch_inf.emptyDir) {
|
|
cFYI(1, ("End of search, empty dir"));
|
|
rc = 0;
|
|
break;
|
|
}
|
|
} else {
|
|
cifsFile->invalidHandle = TRUE;
|
|
CIFSFindClose(xid, pTcon, cifsFile->netfid);
|
|
}
|
|
if(cifsFile->search_resume_name) {
|
|
kfree(cifsFile->search_resume_name);
|
|
cifsFile->search_resume_name = NULL;
|
|
}
|
|
}
|
|
rc = CIFSFindFirst(xid, pTcon, full_path, pfindData,
|
|
&findParms, cifs_sb->local_nls,
|
|
&Unicode, &UnixSearch);
|
|
cFYI(1, ("Count: %d End: %d ",
|
|
le16_to_cpu(findParms.SearchCount),
|
|
le16_to_cpu(findParms.EndofSearch)));
|
|
|
|
if (rc == 0) {
|
|
__u16 count = le16_to_cpu(findParms.SearchCount);
|
|
searchHandle = findParms.SearchHandle;
|
|
if(file->private_data == NULL)
|
|
file->private_data =
|
|
kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL);
|
|
if (file->private_data) {
|
|
memset(file->private_data, 0,
|
|
sizeof (struct cifsFileInfo));
|
|
cifsFile =
|
|
(struct cifsFileInfo *) file->private_data;
|
|
cifsFile->netfid = searchHandle;
|
|
cifsFile->invalidHandle = FALSE;
|
|
init_MUTEX(&cifsFile->fh_sem);
|
|
} else {
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
|
|
renew_parental_timestamps(file->f_dentry);
|
|
lastFindData =
|
|
(FILE_DIRECTORY_INFO *) ((char *) pfindData +
|
|
le16_to_cpu(findParms.LastNameOffset));
|
|
if((char *)lastFindData > (char *)pfindData + bufsize) {
|
|
cFYI(1,("last search entry past end of packet"));
|
|
rc = -EIO;
|
|
break;
|
|
}
|
|
/* Offset of resume key same for levels 257 and 514 */
|
|
cifsFile->srch_inf.resume_key = lastFindData->FileIndex;
|
|
if(UnixSearch == FALSE) {
|
|
cifsFile->resume_name_length =
|
|
le32_to_cpu(lastFindData->FileNameLength);
|
|
if(cifsFile->resume_name_length > bufsize - 64) {
|
|
cFYI(1,("Illegal resume file name length %d",
|
|
cifsFile->resume_name_length));
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
cifsFile->search_resume_name =
|
|
kmalloc(cifsFile->resume_name_length, GFP_KERNEL);
|
|
cFYI(1,("Last file: %s with name %d bytes long",
|
|
lastFindData->FileName,
|
|
cifsFile->resume_name_length));
|
|
if(cifsFile->search_resume_name == NULL) {
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
memcpy(cifsFile->search_resume_name,
|
|
lastFindData->FileName,
|
|
cifsFile->resume_name_length);
|
|
} else {
|
|
pfindDataUnix = (FILE_UNIX_INFO *)lastFindData;
|
|
if (Unicode == TRUE) {
|
|
for(i=0;(pfindDataUnix->FileName[i]
|
|
| pfindDataUnix->FileName[i+1]);
|
|
i+=2) {
|
|
if(i > bufsize-64)
|
|
break;
|
|
}
|
|
cifsFile->resume_name_length = i + 2;
|
|
} else {
|
|
cifsFile->resume_name_length =
|
|
strnlen(pfindDataUnix->FileName,
|
|
bufsize-63);
|
|
}
|
|
if(cifsFile->resume_name_length > bufsize - 64) {
|
|
cFYI(1,("Illegal resume file name length %d",
|
|
cifsFile->resume_name_length));
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
cifsFile->search_resume_name =
|
|
kmalloc(cifsFile->resume_name_length, GFP_KERNEL);
|
|
cFYI(1,("Last file: %s with name %d bytes long",
|
|
pfindDataUnix->FileName,
|
|
cifsFile->resume_name_length));
|
|
if(cifsFile->search_resume_name == NULL) {
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
memcpy(cifsFile->search_resume_name,
|
|
pfindDataUnix->FileName,
|
|
cifsFile->resume_name_length);
|
|
}
|
|
for (i = 2; i < count + 2; i++) {
|
|
if (UnixSearch == FALSE) {
|
|
__u32 len = le32_to_cpu(pfindData->FileNameLength);
|
|
if (Unicode == TRUE)
|
|
len =
|
|
cifs_strfromUCS_le
|
|
(pfindData->FileName,
|
|
(wchar_t *)
|
|
pfindData->FileName,
|
|
len / 2,
|
|
cifs_sb->local_nls);
|
|
qstring.len = len;
|
|
if (((len != 1)
|
|
|| (pfindData->FileName[0] != '.'))
|
|
&& ((len != 2)
|
|
|| (pfindData->
|
|
FileName[0] != '.')
|
|
|| (pfindData->
|
|
FileName[1] != '.'))) {
|
|
if(cifs_filldir(&qstring,
|
|
pfindData,
|
|
file, filldir,
|
|
direntry)) {
|
|
/* do not end search if
|
|
kernel not ready to take
|
|
remaining entries yet */
|
|
reset_resume_key(file, pfindData->FileName,qstring.len,
|
|
Unicode, cifs_sb->local_nls);
|
|
findParms.EndofSearch = 0;
|
|
break;
|
|
}
|
|
file->f_pos++;
|
|
}
|
|
} else { /* UnixSearch */
|
|
pfindDataUnix =
|
|
(FILE_UNIX_INFO *) pfindData;
|
|
if (Unicode == TRUE)
|
|
qstring.len =
|
|
cifs_strfromUCS_le
|
|
(pfindDataUnix->FileName,
|
|
(wchar_t *)
|
|
pfindDataUnix->FileName,
|
|
MAX_PATHCONF,
|
|
cifs_sb->local_nls);
|
|
else
|
|
qstring.len =
|
|
strnlen(pfindDataUnix->
|
|
FileName,
|
|
MAX_PATHCONF);
|
|
if (((qstring.len != 1)
|
|
|| (pfindDataUnix->
|
|
FileName[0] != '.'))
|
|
&& ((qstring.len != 2)
|
|
|| (pfindDataUnix->
|
|
FileName[0] != '.')
|
|
|| (pfindDataUnix->
|
|
FileName[1] != '.'))) {
|
|
if(cifs_filldir_unix(&qstring,
|
|
pfindDataUnix,
|
|
file,
|
|
filldir,
|
|
direntry)) {
|
|
/* do not end search if
|
|
kernel not ready to take
|
|
remaining entries yet */
|
|
findParms.EndofSearch = 0;
|
|
reset_resume_key(file, pfindDataUnix->FileName,
|
|
qstring.len,Unicode,cifs_sb->local_nls);
|
|
break;
|
|
}
|
|
file->f_pos++;
|
|
}
|
|
}
|
|
/* works also for Unix ff struct since first field of both */
|
|
pfindData =
|
|
(FILE_DIRECTORY_INFO *) ((char *) pfindData
|
|
+ le32_to_cpu(pfindData->NextEntryOffset));
|
|
/* BB also should check to make sure that pointer is not beyond the end of the SMB */
|
|
/* if(pfindData > lastFindData) rc = -EIO; break; */
|
|
} /* end for loop */
|
|
if ((findParms.EndofSearch != 0) && cifsFile) {
|
|
cifsFile->srch_inf.endOfSearch = TRUE;
|
|
if(findParms.SearchCount == cpu_to_le16(2))
|
|
cifsFile->srch_inf.emptyDir = TRUE;
|
|
}
|
|
} else {
|
|
if (cifsFile)
|
|
cifsFile->srch_inf.endOfSearch = TRUE;
|
|
/* unless parent directory gone do not return error */
|
|
rc = 0;
|
|
}
|
|
break;
|
|
default:
|
|
if (file->private_data == NULL) {
|
|
rc = -EBADF;
|
|
cFYI(1,
|
|
("Readdir on closed srch, pos = %lld",
|
|
file->f_pos));
|
|
} else {
|
|
cifsFile = (struct cifsFileInfo *) file->private_data;
|
|
if (cifsFile->srch_inf.endOfSearch) {
|
|
rc = 0;
|
|
cFYI(1, ("End of search "));
|
|
break;
|
|
}
|
|
searchHandle = cifsFile->netfid;
|
|
rc = CIFSFindNext(xid, pTcon, pfindData,
|
|
&findNextParms, searchHandle,
|
|
cifsFile->search_resume_name,
|
|
cifsFile->resume_name_length,
|
|
cifsFile->srch_inf.resume_key,
|
|
&Unicode, &UnixSearch);
|
|
cFYI(1,("Count: %d End: %d ",
|
|
le16_to_cpu(findNextParms.SearchCount),
|
|
le16_to_cpu(findNextParms.EndofSearch)));
|
|
if ((rc == 0) && (findNextParms.SearchCount != 0)) {
|
|
/* BB save off resume key, key name and name length */
|
|
__u16 count = le16_to_cpu(findNextParms.SearchCount);
|
|
lastFindData =
|
|
(FILE_DIRECTORY_INFO *) ((char *) pfindData
|
|
+ le16_to_cpu(findNextParms.LastNameOffset));
|
|
if((char *)lastFindData > (char *)pfindData + bufsize) {
|
|
cFYI(1,("last search entry past end of packet"));
|
|
rc = -EIO;
|
|
break;
|
|
}
|
|
/* Offset of resume key same for levels 257 and 514 */
|
|
cifsFile->srch_inf.resume_key = lastFindData->FileIndex;
|
|
|
|
if(UnixSearch == FALSE) {
|
|
cifsFile->resume_name_length =
|
|
le32_to_cpu(lastFindData->FileNameLength);
|
|
if(cifsFile->resume_name_length > bufsize - 64) {
|
|
cFYI(1,("Illegal resume file name length %d",
|
|
cifsFile->resume_name_length));
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
/* Free the memory allocated by previous findfirst
|
|
or findnext call - we can not reuse the memory since
|
|
the resume name may not be same string length */
|
|
if(cifsFile->search_resume_name)
|
|
kfree(cifsFile->search_resume_name);
|
|
cifsFile->search_resume_name =
|
|
kmalloc(cifsFile->resume_name_length, GFP_KERNEL);
|
|
cFYI(1,("Last file: %s with name %d bytes long",
|
|
lastFindData->FileName,
|
|
cifsFile->resume_name_length));
|
|
if(cifsFile->search_resume_name == NULL) {
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
|
|
memcpy(cifsFile->search_resume_name,
|
|
lastFindData->FileName,
|
|
cifsFile->resume_name_length);
|
|
} else {
|
|
pfindDataUnix = (FILE_UNIX_INFO *)lastFindData;
|
|
if (Unicode == TRUE) {
|
|
for(i=0;(pfindDataUnix->FileName[i]
|
|
| pfindDataUnix->FileName[i+1]);
|
|
i+=2) {
|
|
if(i > bufsize-64)
|
|
break;
|
|
}
|
|
cifsFile->resume_name_length = i + 2;
|
|
} else {
|
|
cifsFile->resume_name_length =
|
|
strnlen(pfindDataUnix->
|
|
FileName,
|
|
MAX_PATHCONF);
|
|
}
|
|
if(cifsFile->resume_name_length > bufsize - 64) {
|
|
cFYI(1,("Illegal resume file name length %d",
|
|
cifsFile->resume_name_length));
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
/* Free the memory allocated by previous findfirst
|
|
or findnext call - we can not reuse the memory since
|
|
the resume name may not be same string length */
|
|
if(cifsFile->search_resume_name)
|
|
kfree(cifsFile->search_resume_name);
|
|
cifsFile->search_resume_name =
|
|
kmalloc(cifsFile->resume_name_length, GFP_KERNEL);
|
|
cFYI(1,("fnext last file: %s with name %d bytes long",
|
|
pfindDataUnix->FileName,
|
|
cifsFile->resume_name_length));
|
|
if(cifsFile->search_resume_name == NULL) {
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
memcpy(cifsFile->search_resume_name,
|
|
pfindDataUnix->FileName,
|
|
cifsFile->resume_name_length);
|
|
}
|
|
|
|
for (i = 0; i < count; i++) {
|
|
__u32 len = le32_to_cpu(pfindData->
|
|
FileNameLength);
|
|
if (UnixSearch == FALSE) {
|
|
if (Unicode == TRUE)
|
|
len =
|
|
cifs_strfromUCS_le
|
|
(pfindData->FileName,
|
|
(wchar_t *)
|
|
pfindData->FileName,
|
|
len / 2,
|
|
cifs_sb->local_nls);
|
|
qstring.len = len;
|
|
if (((len != 1)
|
|
|| (pfindData->FileName[0] != '.'))
|
|
&& ((len != 2)
|
|
|| (pfindData->FileName[0] != '.')
|
|
|| (pfindData->FileName[1] !=
|
|
'.'))) {
|
|
if(cifs_filldir
|
|
(&qstring,
|
|
pfindData,
|
|
file, filldir,
|
|
direntry)) {
|
|
/* do not end search if
|
|
kernel not ready to take
|
|
remaining entries yet */
|
|
findNextParms.EndofSearch = 0;
|
|
reset_resume_key(file, pfindData->FileName,qstring.len,
|
|
Unicode,cifs_sb->local_nls);
|
|
break;
|
|
}
|
|
file->f_pos++;
|
|
}
|
|
} else { /* UnixSearch */
|
|
pfindDataUnix =
|
|
(FILE_UNIX_INFO *)
|
|
pfindData;
|
|
if (Unicode == TRUE)
|
|
qstring.len =
|
|
cifs_strfromUCS_le
|
|
(pfindDataUnix->FileName,
|
|
(wchar_t *)
|
|
pfindDataUnix->FileName,
|
|
MAX_PATHCONF,
|
|
cifs_sb->local_nls);
|
|
else
|
|
qstring.len =
|
|
strnlen
|
|
(pfindDataUnix->
|
|
FileName,
|
|
MAX_PATHCONF);
|
|
if (((qstring.len != 1)
|
|
|| (pfindDataUnix->
|
|
FileName[0] != '.'))
|
|
&& ((qstring.len != 2)
|
|
|| (pfindDataUnix->
|
|
FileName[0] != '.')
|
|
|| (pfindDataUnix->
|
|
FileName[1] !=
|
|
'.'))) {
|
|
if(cifs_filldir_unix
|
|
(&qstring,
|
|
pfindDataUnix,
|
|
file, filldir,
|
|
direntry)) {
|
|
/* do not end search if
|
|
kernel not ready to take
|
|
remaining entries yet */
|
|
findNextParms.EndofSearch = 0;
|
|
reset_resume_key(file, pfindDataUnix->FileName,qstring.len,
|
|
Unicode,cifs_sb->local_nls);
|
|
break;
|
|
}
|
|
file->f_pos++;
|
|
}
|
|
}
|
|
pfindData = (FILE_DIRECTORY_INFO *) ((char *) pfindData +
|
|
le32_to_cpu(pfindData->NextEntryOffset));
|
|
/* works also for Unix find struct since first field of both */
|
|
/* BB also should check to ensure pointer not beyond end of SMB */
|
|
} /* end for loop */
|
|
if (findNextParms.EndofSearch != 0) {
|
|
cifsFile->srch_inf.endOfSearch = TRUE;
|
|
}
|
|
} else {
|
|
cifsFile->srch_inf.endOfSearch = TRUE;
|
|
rc = 0; /* unless parent directory disappeared - do not
|
|
return error here (eg Access Denied or no more files) */
|
|
}
|
|
}
|
|
} /* end switch */
|
|
if (data)
|
|
kfree(data);
|
|
if (full_path)
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
|
|
return rc;
|
|
}
|
|
int cifs_prepare_write(struct file *file, struct page *page,
|
|
unsigned from, unsigned to)
|
|
{
|
|
int rc = 0;
|
|
loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
|
|
cFYI(1,("prepare write for page %p from %d to %d",page,from,to));
|
|
if (!PageUptodate(page)) {
|
|
/* if (to - from != PAGE_CACHE_SIZE) {
|
|
void *kaddr = kmap_atomic(page, KM_USER0);
|
|
memset(kaddr, 0, from);
|
|
memset(kaddr + to, 0, PAGE_CACHE_SIZE - to);
|
|
flush_dcache_page(page);
|
|
kunmap_atomic(kaddr, KM_USER0);
|
|
} */
|
|
/* If we are writing a full page it will be up to date,
|
|
no need to read from the server */
|
|
if((to==PAGE_CACHE_SIZE) && (from == 0))
|
|
SetPageUptodate(page);
|
|
|
|
/* might as well read a page, it is fast enough */
|
|
if((file->f_flags & O_ACCMODE) != O_WRONLY) {
|
|
rc = cifs_readpage_worker(file,page,&offset);
|
|
} else {
|
|
/* should we try using another
|
|
file handle if there is one - how would we lock it
|
|
to prevent close of that handle racing with this read? */
|
|
/* In any case this will be written out by commit_write */
|
|
}
|
|
}
|
|
|
|
/* BB should we pass any errors back? e.g. if we do not have read access to the file */
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct address_space_operations cifs_addr_ops = {
|
|
.readpage = cifs_readpage,
|
|
.readpages = cifs_readpages,
|
|
.writepage = cifs_writepage,
|
|
.prepare_write = cifs_prepare_write,
|
|
.commit_write = cifs_commit_write,
|
|
.set_page_dirty = __set_page_dirty_nobuffers,
|
|
/* .sync_page = cifs_sync_page, */
|
|
/*.direct_IO = */
|
|
};
|