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 #include <sys/ipc_impl.h> 30 #if defined(_KERNEL) || defined(_KMEMUSER) 31 #include <sys/shm.h> 32 #include <sys/avl.h> 33 #include <sys/t_lock.h> 34 #endif 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 /* 41 * shmsys system call subcodes 42 */ 43 #define SHMAT 0 44 #define SHMCTL 1 45 #define SHMDT 2 46 #define SHMGET 3 47 #define SHMIDS 4 48 49 /* 50 * There is a shared mem id data structure (shmid_ds) for each 51 * segment in the system. 52 */ 53 #if defined(_KERNEL) || defined(_KMEMUSER) 54 typedef struct kshmid { 55 kipc_perm_t shm_perm; /* operation permission struct */ 56 size_t shm_segsz; /* size of segment in bytes */ 57 struct anon_map *shm_amp; /* segment anon_map pointer */ 58 ushort_t shm_lkcnt; /* number of times it is being locked */ 59 pgcnt_t shm_lkpages; /* number of pages locked by shmctl */ 60 kmutex_t shm_mlock; /* held when locking physical pages */ 61 /* Therefore, protects p_lckcnt for */ 62 /* pages that back shm */ 63 pid_t shm_lpid; /* pid of last shmop */ 64 pid_t shm_cpid; /* pid of creator */ 65 ulong_t shm_ismattch; /* number of ISM attaches */ 66 time_t shm_atime; /* last shmat time */ 67 time_t shm_dtime; /* last shmdt time */ 68 time_t shm_ctime; /* last change time */ 69 struct sptinfo *shm_sptinfo; /* info about ISM segment */ 70 struct seg *shm_sptseg; /* pointer to ISM segment */ 71 long shm_sptprot; /* was reserved (still a "long") */ 72 } kshmid_t; 73 74 /* 75 * Segacct Flags. 76 */ 77 #define SHMSA_ISM 1 /* uses shared page table */ 78 79 typedef struct sptinfo { 80 struct as *sptas; /* dummy as ptr. for spt segment */ 81 } sptinfo_t; 82 83 /* 84 * Protected by p->p_lock 85 */ 86 typedef struct segacct { 87 avl_node_t sa_tree; 88 caddr_t sa_addr; 89 size_t sa_len; 90 ulong_t sa_flags; 91 kshmid_t *sa_id; 92 } segacct_t; 93 94 /* 95 * Error codes for shmgetid(). 96 */ 97 #define SHMID_NONE (-1) 98 #define SHMID_FREE (-2) 99 100 extern void shminit(void); 101 extern void shmfork(struct proc *, struct proc *); 102 extern void shmexit(struct proc *); 103 extern int shmgetid(struct proc *, caddr_t); 104 105 #endif /* _KERNEL */ 106 107 #if defined(_SYSCALL32) 108 /* 109 * LP64 view of the ILP32 shmid_ds structure 110 */ 111 struct shmid_ds32 { 112 struct ipc_perm32 shm_perm; /* operation permission struct */ 113 size32_t shm_segsz; /* size of segment in bytes */ 114 caddr32_t shm_amp; /* segment anon_map pointer */ 115 uint16_t shm_lkcnt; /* number of times it is being locked */ 116 pid32_t shm_lpid; /* pid of last shmop */ 117 pid32_t shm_cpid; /* pid of creator */ 118 uint32_t shm_nattch; /* number of attaches */ 119 uint32_t shm_cnattch; /* number of ISM attaches */ 120 time32_t shm_atime; /* last shmat time */ 121 int32_t shm_pad1; /* reserved for time_t expansion */ 122 time32_t shm_dtime; /* last shmdt time */ 123 int32_t shm_pad2; /* reserved for time_t expansion */ 124 time32_t shm_ctime; /* last change time */ 125 int32_t shm_pad3; /* reserved for time_t expansion */ 126 int32_t shm_pad4[4]; /* reserve area */ 127 }; 128 #endif 129 130 #ifdef __cplusplus 131 } 132 #endif 133 134 #endif /* _SYS_SHM_IMPL_H */ 135