nfsd: add a header describing upcall to nfsdcld
The daemon takes a versioned binary struct. Hopefully this should allow us to revise the struct later if it becomes necessary. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
parent
7ea34ac15e
commit
0ab628d856
56
include/linux/nfsd/cld.h
Normal file
56
include/linux/nfsd/cld.h
Normal file
|
@ -0,0 +1,56 @@
|
|||
/*
|
||||
* Upcall description for nfsdcld communication
|
||||
*
|
||||
* Copyright (c) 2012 Red Hat, Inc.
|
||||
* Author(s): Jeff Layton <jlayton@redhat.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#ifndef _NFSD_CLD_H
|
||||
#define _NFSD_CLD_H
|
||||
|
||||
/* latest upcall version available */
|
||||
#define CLD_UPCALL_VERSION 1
|
||||
|
||||
/* defined by RFC3530 */
|
||||
#define NFS4_OPAQUE_LIMIT 1024
|
||||
|
||||
enum cld_command {
|
||||
Cld_Create, /* create a record for this cm_id */
|
||||
Cld_Remove, /* remove record of this cm_id */
|
||||
Cld_Check, /* is this cm_id allowed? */
|
||||
Cld_GraceDone, /* grace period is complete */
|
||||
};
|
||||
|
||||
/* representation of long-form NFSv4 client ID */
|
||||
struct cld_name {
|
||||
uint16_t cn_len; /* length of cm_id */
|
||||
unsigned char cn_id[NFS4_OPAQUE_LIMIT]; /* client-provided */
|
||||
} __attribute__((packed));
|
||||
|
||||
/* message struct for communication with userspace */
|
||||
struct cld_msg {
|
||||
uint8_t cm_vers; /* upcall version */
|
||||
uint8_t cm_cmd; /* upcall command */
|
||||
int16_t cm_status; /* return code */
|
||||
uint32_t cm_xid; /* transaction id */
|
||||
union {
|
||||
int64_t cm_gracetime; /* grace period start time */
|
||||
struct cld_name cm_name;
|
||||
} __attribute__((packed)) cm_u;
|
||||
} __attribute__((packed));
|
||||
|
||||
#endif /* !_NFSD_CLD_H */
|
Loading…
Reference in a new issue