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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_SHM_IMPL_H
#define _SYS_SHM_IMPL_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/ipc_impl.h>
#if defined(_KERNEL) || defined(_KMEMUSER)
#include <sys/shm.h>
#include <sys/avl.h>
#include <sys/t_lock.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* shmsys system call subcodes
*/
#define SHMAT 0
#define SHMCTL 1
#define SHMDT 2
#define SHMGET 3
#define SHMIDS 4
/*
* There is a shared mem id data structure (shmid_ds) for each
* segment in the system.
*/
#if defined(_KERNEL) || defined(_KMEMUSER)
typedef struct kshmid {
kipc_perm_t shm_perm; /* operation permission struct */
size_t shm_segsz; /* size of segment in bytes */
struct anon_map *shm_amp; /* segment anon_map pointer */
ushort_t shm_lkcnt; /* number of times it is being locked */
pgcnt_t shm_lkpages; /* number of pages locked by shmctl */
kmutex_t shm_mlock; /* held when locking physical pages */
/* Therefore, protects p_lckcnt for */
/* pages that back shm */
pid_t shm_lpid; /* pid of last shmop */
pid_t shm_cpid; /* pid of creator */
ulong_t shm_ismattch; /* number of ISM attaches */
time_t shm_atime; /* last shmat time */
time_t shm_dtime; /* last shmdt time */
time_t shm_ctime; /* last change time */
struct sptinfo *shm_sptinfo; /* info about ISM segment */
struct seg *shm_sptseg; /* pointer to ISM segment */
long shm_sptprot; /* was reserved (still a "long") */
} kshmid_t;
/*
* Segacct Flags.
*/
#define SHMSA_ISM 1 /* uses shared page table */
typedef struct sptinfo {
struct as *sptas; /* dummy as ptr. for spt segment */
} sptinfo_t;
/*
* Protected by p->p_lock
*/
typedef struct segacct {
avl_node_t sa_tree;
caddr_t sa_addr;
size_t sa_len;
ulong_t sa_flags;
kshmid_t *sa_id;
} segacct_t;
/*
* Error codes for shmgetid().
*/
#define SHMID_NONE (-1)
#define SHMID_FREE (-2)
extern void shminit(void);
extern void shmfork(struct proc *, struct proc *);
extern void shmexit(struct proc *);
extern int shmgetid(struct proc *, caddr_t);
#endif /* _KERNEL */
#if defined(_SYSCALL32)
/*
* LP64 view of the ILP32 shmid_ds structure
*/
struct shmid_ds32 {
struct ipc_perm32 shm_perm; /* operation permission struct */
size32_t shm_segsz; /* size of segment in bytes */
caddr32_t shm_amp; /* segment anon_map pointer */
uint16_t shm_lkcnt; /* number of times it is being locked */
pid32_t shm_lpid; /* pid of last shmop */
pid32_t shm_cpid; /* pid of creator */
uint32_t shm_nattch; /* number of attaches */
uint32_t shm_cnattch; /* number of ISM attaches */
time32_t shm_atime; /* last shmat time */
int32_t shm_pad1; /* reserved for time_t expansion */
time32_t shm_dtime; /* last shmdt time */
int32_t shm_pad2; /* reserved for time_t expansion */
time32_t shm_ctime; /* last change time */
int32_t shm_pad3; /* reserved for time_t expansion */
int32_t shm_pad4[4]; /* reserve area */
};
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SHM_IMPL_H */
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