107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/*
|
|
* fs/cifs/smb2file.c
|
|
*
|
|
* Copyright (C) International Business Machines Corp., 2002, 2011
|
|
* Author(s): Steve French (sfrench@us.ibm.com),
|
|
* Pavel Shilovsky ((pshilovsky@samba.org) 2012
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published
|
|
* by the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
|
* the GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include <linux/fs.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/pagemap.h>
|
|
#include <asm/div64.h>
|
|
#include "cifsfs.h"
|
|
#include "cifspdu.h"
|
|
#include "cifsglob.h"
|
|
#include "cifsproto.h"
|
|
#include "cifs_debug.h"
|
|
#include "cifs_fs_sb.h"
|
|
#include "cifs_unicode.h"
|
|
#include "fscache.h"
|
|
#include "smb2proto.h"
|
|
|
|
void
|
|
smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock)
|
|
{
|
|
oplock &= 0xFF;
|
|
if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
|
|
cinode->clientCanCacheAll = true;
|
|
cinode->clientCanCacheRead = true;
|
|
cFYI(1, "Exclusive Oplock granted on inode %p",
|
|
&cinode->vfs_inode);
|
|
} else if (oplock == SMB2_OPLOCK_LEVEL_II) {
|
|
cinode->clientCanCacheAll = false;
|
|
cinode->clientCanCacheRead = true;
|
|
cFYI(1, "Level II Oplock granted on inode %p",
|
|
&cinode->vfs_inode);
|
|
} else {
|
|
cinode->clientCanCacheAll = false;
|
|
cinode->clientCanCacheRead = false;
|
|
}
|
|
}
|
|
|
|
int
|
|
smb2_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path,
|
|
int disposition, int desired_access, int create_options,
|
|
struct cifs_fid *fid, __u32 *oplock, FILE_ALL_INFO *buf,
|
|
struct cifs_sb_info *cifs_sb)
|
|
{
|
|
int rc;
|
|
__le16 *smb2_path;
|
|
struct smb2_file_all_info *smb2_data = NULL;
|
|
|
|
smb2_path = cifs_convert_path_to_utf16(path, cifs_sb);
|
|
if (smb2_path == NULL) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
|
|
GFP_KERNEL);
|
|
if (smb2_data == NULL) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
desired_access |= FILE_READ_ATTRIBUTES;
|
|
*oplock = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
|
|
|
|
rc = SMB2_open(xid, tcon, smb2_path, &fid->persistent_fid,
|
|
&fid->volatile_fid, desired_access, disposition,
|
|
0, 0, (__u8 *)oplock, smb2_data);
|
|
if (rc)
|
|
goto out;
|
|
|
|
if (buf) {
|
|
/* open response does not have IndexNumber field - get it */
|
|
rc = SMB2_get_srv_num(xid, tcon, fid->persistent_fid,
|
|
fid->volatile_fid,
|
|
&smb2_data->IndexNumber);
|
|
if (rc) {
|
|
/* let get_inode_info disable server inode numbers */
|
|
smb2_data->IndexNumber = 0;
|
|
rc = 0;
|
|
}
|
|
move_smb2_info_to_cifs(buf, smb2_data);
|
|
}
|
|
|
|
out:
|
|
kfree(smb2_data);
|
|
kfree(smb2_path);
|
|
return rc;
|
|
}
|