1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_SHM_IMPL_H 27 #define _SYS_SHM_IMPL_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/ipc_impl.h> 32 #if defined(_KERNEL) || defined(_KMEMUSER) 33 #include <sys/shm.h> 34 #include <sys/avl.h> 35 #include <sys/t_lock.h> 36 #endif 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * shmsys system call subcodes 44 */ 45 #define SHMAT 0 46 #define SHMCTL 1 47 #define SHMDT 2 48 #define SHMGET 3 49 #define SHMIDS 4 50 51 /* 52 * There is a shared mem id data structure (shmid_ds) for each 53 * segment in the system. 54 */ 55 #if defined(_KERNEL) || defined(_KMEMUSER) 56 typedef struct kshmid { 57 kipc_perm_t shm_perm; /* operation permission struct */ 58 size_t shm_segsz; /* size of segment in bytes */ 59 struct anon_map *shm_amp; /* segment anon_map pointer */ 60 ushort_t shm_lkcnt; /* number of times it is being locked */ 61 pgcnt_t shm_lkpages; /* number of pages locked by shmctl */ 62 kmutex_t shm_mlock; /* held when locking physical pages */ 63 /* Therefore, protects p_lckcnt for */ 64 /* pages that back shm */ 65 pid_t shm_lpid; /* pid of last shmop */ 66 pid_t shm_cpid; /* pid of creator */ 67 ulong_t shm_ismattch; /* number of ISM attaches */ 68 time_t shm_atime; /* last shmat time */ 69 time_t shm_dtime; /* last shmdt time */ 70 time_t shm_ctime; /* last change time */ 71 struct sptinfo *shm_sptinfo; /* info about ISM segment */ 72 struct seg *shm_sptseg; /* pointer to ISM segment */ 73 long shm_sptprot; /* was reserved (still a "long") */ 74 } kshmid_t; 75 76 /* 77 * Segacct Flags. 78 */ 79 #define SHMSA_ISM 1 /* uses shared page table */ 80 81 typedef struct sptinfo { 82 struct as *sptas; /* dummy as ptr. for spt segment */ 83 } sptinfo_t; 84 85 /* 86 * Protected by p->p_lock 87 */ 88 typedef struct segacct { 89 avl_node_t sa_tree; 90 caddr_t sa_addr; 91 size_t sa_len; 92 ulong_t sa_flags; 93 kshmid_t *sa_id; 94 } segacct_t; 95 96 /* 97 * Error codes for shmgetid(). 98 */ 99 #define SHMID_NONE (-1) 100 #define SHMID_FREE (-2) 101 102 extern void shminit(void); 103 extern void shmfork(struct proc *, struct proc *); 104 extern void shmexit(struct proc *); 105 extern int shmgetid(struct proc *, caddr_t); 106 107 #endif /* _KERNEL */ 108 109 #if defined(_SYSCALL32) 110 /* 111 * LP64 view of the ILP32 shmid_ds structure 112 */ 113 struct shmid_ds32 { 114 struct ipc_perm32 shm_perm; /* operation permission struct */ 115 size32_t shm_segsz; /* size of segment in bytes */ 116 caddr32_t shm_amp; /* segment anon_map pointer */ 117 uint16_t shm_lkcnt; /* number of times it is being locked */ 118 pid32_t shm_lpid; /* pid of last shmop */ 119 pid32_t shm_cpid; /* pid of creator */ 120 uint32_t shm_nattch; /* number of attaches */ 121 uint32_t shm_cnattch; /* number of ISM attaches */ 122 time32_t shm_atime; /* last shmat time */ 123 int32_t shm_pad1; /* reserved for time_t expansion */ 124 time32_t shm_dtime; /* last shmdt time */ 125 int32_t shm_pad2; /* reserved for time_t expansion */ 126 time32_t shm_ctime; /* last change time */ 127 int32_t shm_pad3; /* reserved for time_t expansion */ 128 int32_t shm_pad4[4]; /* reserve area */ 129 }; 130 #endif 131 132 #ifdef __cplusplus 133 } 134 #endif 135 136 #endif /* _SYS_SHM_IMPL_H */ 137