mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
113 lines
4.4 KiB
C
113 lines
4.4 KiB
C
/*-
|
|
* Copyright (c) 1998 Berkeley Software Design, Inc. All rights reserved.
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Berkeley Software Design Inc's name may not be used to endorse or
|
|
* promote products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from nfs_lock.h,v 2.2 1998/04/28 19:38:41 don Exp
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* lockd uses the nfssvc system call to get the unique kernel services it needs.
|
|
* It passes in a request structure with a version number at the start.
|
|
* This prevents libc from needing to change if the information passed
|
|
* between lockd and the kernel needs to change.
|
|
*
|
|
* If a structure changes, you must bump the version number.
|
|
*/
|
|
|
|
#include <nfs/nfsproto.h>
|
|
|
|
|
|
#define LOCKD_REQ_VERSION 1
|
|
|
|
struct lockd_req {
|
|
int vers; /* keep in sync with kernel please */
|
|
int op; /* F_GETLK | F_SETLK | F_UNLCK */
|
|
int owner; /* owner of lock, -1 to allocate one */
|
|
int owner_rel_ok; /* release owner if no locks left ? */
|
|
int *owner_ret; /* owner alloc/free result target */
|
|
void *fh; /* NFS file handle */
|
|
size_t fh_len; /* NFS file handle length */
|
|
u_quad_t offset; /* offset of where to start lock */
|
|
u_quad_t len; /* length of range to lock */
|
|
int type; /* F_RDLCK | F_WRLCK | F_UNLCK */
|
|
struct ucred cred; /* user credentials to use for lock */
|
|
struct sockaddr saddr; /* XXX how about non AF_INET ?? */
|
|
int pid; /* pid of lock requester */
|
|
};
|
|
|
|
/*
|
|
* The fifo where the kernel writes requests for locks on remote NFS files,
|
|
* and where lockd reads these requests.
|
|
*
|
|
*/
|
|
#define _PATH_LCKFIFO "/var/run/lock"
|
|
|
|
/*
|
|
* This structure is used to uniquely identify the process which originated
|
|
* a particular message to lockd. A sequence number is used to differentiate
|
|
* multiple messages from the same process. A process start time is used to
|
|
* detect the unlikely, but possible, event of the recycling of a pid.
|
|
*/
|
|
struct lockd_msg_ident {
|
|
pid_t pid; /* The process ID. */
|
|
struct timeval pid_start; /* Start time of process id */
|
|
int msg_seq; /* Sequence number of message */
|
|
};
|
|
|
|
#define LOCKD_MSG_VERSION 1
|
|
|
|
/*
|
|
* The structure that the kernel hands us for each lock request.
|
|
*/
|
|
typedef struct __lock_msg {
|
|
int lm_version; /* which version is this */
|
|
struct lockd_msg_ident lm_msg_ident; /* originator of the message */
|
|
struct flock lm_fl; /* The lock request. */
|
|
int lm_wait; /* The F_WAIT flag. */
|
|
int lm_getlk; /* is this a F_GETLK request */
|
|
struct sockaddr lm_addr; /* The address. */
|
|
int lm_nfsv3; /* If NFS version 3. */
|
|
size_t lm_fh_len; /* The file handle length. */
|
|
struct ucred lm_cred; /* user cred for lock req */
|
|
u_int8_t lm_fh[NFS_SMALLFH];/* The file handle. */
|
|
} LOCKD_MSG;
|
|
|
|
#define LOCKD_ANS_VERSION 1
|
|
|
|
struct lockd_ans {
|
|
int la_vers;
|
|
struct lockd_msg_ident la_msg_ident; /* originator of the message */
|
|
int la_errno;
|
|
int la_set_getlk_pid; /* use returned pid */
|
|
int la_getlk_pid; /* returned pid for F_GETLK */
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
int nfs_dolock(struct vop_advlock_args *ap);
|
|
int nfslockdans(struct proc *p, struct lockd_ans *ansp);
|
|
int nfslockdreq(struct proc *p, struct lockd_req *reqp);
|
|
#endif
|