mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 09:50:55 +07:00
737b758c96
Signed-off-by: Steve French (sfrench@us.ibm.com) Signed-off-by: Linus Torvalds <torvalds@osdl.org>
119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/*
|
|
* fs/cifs/fcntl.c
|
|
*
|
|
* vfs operations that deal with the file control API
|
|
*
|
|
* Copyright (C) International Business Machines Corp., 2003,2004
|
|
* 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 <linux/stat.h>
|
|
#include <linux/fcntl.h>
|
|
#include "cifsglob.h"
|
|
#include "cifsproto.h"
|
|
#include "cifs_unicode.h"
|
|
#include "cifs_debug.h"
|
|
#include "cifsfs.h"
|
|
|
|
static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags)
|
|
{
|
|
__u32 cifs_ntfy_flags = 0;
|
|
|
|
/* No way on Linux VFS to ask to monitor xattr
|
|
changes (and no stream support either */
|
|
if(fcntl_notify_flags & DN_ACCESS) {
|
|
cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS;
|
|
}
|
|
if(fcntl_notify_flags & DN_MODIFY) {
|
|
/* What does this mean on directories? */
|
|
cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE |
|
|
FILE_NOTIFY_CHANGE_SIZE;
|
|
}
|
|
if(fcntl_notify_flags & DN_CREATE) {
|
|
cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION |
|
|
FILE_NOTIFY_CHANGE_LAST_WRITE;
|
|
}
|
|
if(fcntl_notify_flags & DN_DELETE) {
|
|
cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE;
|
|
}
|
|
if(fcntl_notify_flags & DN_RENAME) {
|
|
/* BB review this - checking various server behaviors */
|
|
cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME |
|
|
FILE_NOTIFY_CHANGE_FILE_NAME;
|
|
}
|
|
if(fcntl_notify_flags & DN_ATTRIB) {
|
|
cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY |
|
|
FILE_NOTIFY_CHANGE_ATTRIBUTES;
|
|
}
|
|
/* if(fcntl_notify_flags & DN_MULTISHOT) {
|
|
cifs_ntfy_flags |= ;
|
|
} */ /* BB fixme - not sure how to handle this with CIFS yet */
|
|
|
|
|
|
return cifs_ntfy_flags;
|
|
}
|
|
|
|
int cifs_dir_notify(struct file * file, unsigned long arg)
|
|
{
|
|
int xid;
|
|
int rc = -EINVAL;
|
|
int oplock = FALSE;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
char *full_path = NULL;
|
|
__u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES;
|
|
__u16 netfid;
|
|
|
|
xid = GetXid();
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
down(&file->f_dentry->d_sb->s_vfs_rename_sem);
|
|
full_path = build_path_from_dentry(file->f_dentry);
|
|
up(&file->f_dentry->d_sb->s_vfs_rename_sem);
|
|
|
|
if(full_path == NULL) {
|
|
rc = -ENOMEM;
|
|
} else {
|
|
cERROR(1,("cifs dir notify on file %s with arg 0x%lx",full_path,arg)); /* BB removeme BB */
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
|
|
GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
|
|
&netfid, &oplock,NULL, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
/* BB fixme - add this handle to a notify handle list */
|
|
if(rc) {
|
|
cERROR(1,("Could not open directory for notify")); /* BB remove BB */
|
|
} else {
|
|
filter = convert_to_cifs_notify_flags(arg);
|
|
if(filter != 0) {
|
|
rc = CIFSSMBNotify(xid, pTcon, 0 /* no subdirs */, netfid,
|
|
filter, cifs_sb->local_nls);
|
|
} else {
|
|
rc = -EINVAL;
|
|
}
|
|
/* BB add code to close file eventually (at unmount
|
|
it would close automatically but may be a way
|
|
to do it easily when inode freed or when
|
|
notify info is cleared/changed */
|
|
cERROR(1,("notify rc %d",rc));
|
|
}
|
|
}
|
|
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|