mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-22 17:33:01 +00:00
618763958b
Commit13cfb7334emade cifs_ioctl use the tlink attached to the cifsFileInfo for a filp. This ignores the case of an open directory however, which in CIFS can have a NULL private_data until a readdir is done on it. This patch re-adds the NULL pointer checks that were removed in commit50ae28f01and moves the setting of tcon and "caps" variables lower. Long term, a better fix would be to establish a f_op->open routine for directories that populates that field at open time, but that requires some other changes to how readdir calls are handled. Reported-by: Kjell Rune Skaaraas <kjella79@yahoo.no> Reviewed-and-Tested-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*
|
|
* fs/cifs/ioctl.c
|
|
*
|
|
* vfs operations that deal with io control
|
|
*
|
|
* Copyright (C) International Business Machines Corp., 2005,2007
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
|
*
|
|
* 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 "cifspdu.h"
|
|
#include "cifsglob.h"
|
|
#include "cifsproto.h"
|
|
#include "cifs_debug.h"
|
|
#include "cifsfs.h"
|
|
|
|
#define CIFS_IOC_CHECKUMOUNT _IO(0xCF, 2)
|
|
|
|
long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
|
|
{
|
|
struct inode *inode = filep->f_dentry->d_inode;
|
|
int rc = -ENOTTY; /* strange error - but the precedent */
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
#ifdef CONFIG_CIFS_POSIX
|
|
struct cifsFileInfo *pSMBFile = filep->private_data;
|
|
struct cifsTconInfo *tcon;
|
|
__u64 ExtAttrBits = 0;
|
|
__u64 ExtAttrMask = 0;
|
|
__u64 caps;
|
|
#endif /* CONFIG_CIFS_POSIX */
|
|
|
|
xid = GetXid();
|
|
|
|
cFYI(1, "ioctl file %p cmd %u arg %lu", filep, command, arg);
|
|
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
|
|
switch (command) {
|
|
case CIFS_IOC_CHECKUMOUNT:
|
|
cFYI(1, "User unmount attempted");
|
|
if (cifs_sb->mnt_uid == current_uid())
|
|
rc = 0;
|
|
else {
|
|
rc = -EACCES;
|
|
cFYI(1, "uids do not match");
|
|
}
|
|
break;
|
|
#ifdef CONFIG_CIFS_POSIX
|
|
case FS_IOC_GETFLAGS:
|
|
if (pSMBFile == NULL)
|
|
break;
|
|
tcon = tlink_tcon(pSMBFile->tlink);
|
|
caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
|
|
if (CIFS_UNIX_EXTATTR_CAP & caps) {
|
|
rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid,
|
|
&ExtAttrBits, &ExtAttrMask);
|
|
if (rc == 0)
|
|
rc = put_user(ExtAttrBits &
|
|
FS_FL_USER_VISIBLE,
|
|
(int __user *)arg);
|
|
}
|
|
break;
|
|
|
|
case FS_IOC_SETFLAGS:
|
|
if (pSMBFile == NULL)
|
|
break;
|
|
tcon = tlink_tcon(pSMBFile->tlink);
|
|
caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
|
|
if (CIFS_UNIX_EXTATTR_CAP & caps) {
|
|
if (get_user(ExtAttrBits, (int __user *)arg)) {
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
/* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid,
|
|
extAttrBits, &ExtAttrMask);*/
|
|
}
|
|
cFYI(1, "set flags not implemented yet");
|
|
break;
|
|
#endif /* CONFIG_CIFS_POSIX */
|
|
default:
|
|
cFYI(1, "unsupported ioctl");
|
|
break;
|
|
}
|
|
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|