Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: ipc.c,v 1.5 1999/12/09 00:41:00 davem Exp $ |
| 2 | * ipc.c: Solaris IPC emulation |
| 3 | * |
| 4 | * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
| 5 | */ |
| 6 | |
| 7 | #include <linux/kernel.h> |
| 8 | #include <linux/types.h> |
| 9 | #include <linux/smp_lock.h> |
| 10 | #include <linux/wait.h> |
| 11 | #include <linux/mm.h> |
| 12 | #include <linux/shm.h> |
| 13 | #include <linux/sem.h> |
| 14 | #include <linux/msg.h> |
| 15 | |
| 16 | #include <asm/uaccess.h> |
| 17 | #include <asm/string.h> |
| 18 | #include <asm/ipc.h> |
| 19 | |
| 20 | #include "conv.h" |
| 21 | |
| 22 | struct solaris_ipc_perm { |
| 23 | s32 uid; |
| 24 | s32 gid; |
| 25 | s32 cuid; |
| 26 | s32 cgid; |
| 27 | u32 mode; |
| 28 | u32 seq; |
| 29 | int key; |
| 30 | s32 pad[4]; |
| 31 | }; |
| 32 | |
| 33 | struct solaris_shmid_ds { |
| 34 | struct solaris_ipc_perm shm_perm; |
| 35 | int shm_segsz; |
| 36 | u32 shm_amp; |
| 37 | unsigned short shm_lkcnt; |
| 38 | char __padxx[2]; |
| 39 | s32 shm_lpid; |
| 40 | s32 shm_cpid; |
| 41 | u32 shm_nattch; |
| 42 | u32 shm_cnattch; |
| 43 | s32 shm_atime; |
| 44 | s32 shm_pad1; |
| 45 | s32 shm_dtime; |
| 46 | s32 shm_pad2; |
| 47 | s32 shm_ctime; |
| 48 | s32 shm_pad3; |
| 49 | unsigned short shm_cv; |
| 50 | char shm_pad4[2]; |
| 51 | u32 shm_sptas; |
| 52 | s32 shm_pad5[2]; |
| 53 | }; |
| 54 | |
| 55 | asmlinkage long solaris_shmsys(int cmd, u32 arg1, u32 arg2, u32 arg3) |
| 56 | { |
| 57 | int (*sys_ipc)(unsigned,int,int,unsigned long,void __user *,long) = |
| 58 | (int (*)(unsigned,int,int,unsigned long,void __user *,long))SYS(ipc); |
| 59 | mm_segment_t old_fs; |
| 60 | unsigned long raddr; |
| 61 | int ret; |
| 62 | |
| 63 | switch (cmd) { |
| 64 | case 0: /* shmat */ |
| 65 | old_fs = get_fs(); |
| 66 | set_fs(KERNEL_DS); |
| 67 | ret = sys_ipc(SHMAT, arg1, arg3 & ~0x4000, (unsigned long)&raddr, A(arg2), 0); |
| 68 | set_fs(old_fs); |
| 69 | if (ret >= 0) return (u32)raddr; |
| 70 | else return ret; |
| 71 | case 1: /* shmctl */ |
| 72 | switch (arg2) { |
| 73 | case 3: /* SHM_LOCK */ |
| 74 | case 4: /* SHM_UNLOCK */ |
| 75 | return sys_ipc(SHMCTL, arg1, (arg2 == 3) ? SHM_LOCK : SHM_UNLOCK, 0, NULL, 0); |
| 76 | case 10: /* IPC_RMID */ |
| 77 | return sys_ipc(SHMCTL, arg1, IPC_RMID, 0, NULL, 0); |
| 78 | case 11: /* IPC_SET */ |
| 79 | { |
| 80 | struct shmid_ds s; |
| 81 | struct solaris_shmid_ds __user *p = A(arg3); |
| 82 | |
| 83 | if (get_user (s.shm_perm.uid, &p->shm_perm.uid) || |
| 84 | __get_user (s.shm_perm.gid, &p->shm_perm.gid) || |
| 85 | __get_user (s.shm_perm.mode, &p->shm_perm.mode)) |
| 86 | return -EFAULT; |
| 87 | old_fs = get_fs(); |
| 88 | set_fs(KERNEL_DS); |
| 89 | ret = sys_ipc(SHMCTL, arg1, IPC_SET, 0, &s, 0); |
| 90 | set_fs(old_fs); |
| 91 | return ret; |
| 92 | } |
| 93 | case 12: /* IPC_STAT */ |
| 94 | { |
| 95 | struct shmid_ds s; |
| 96 | struct solaris_shmid_ds __user *p = A(arg3); |
| 97 | |
| 98 | old_fs = get_fs(); |
| 99 | set_fs(KERNEL_DS); |
| 100 | ret = sys_ipc(SHMCTL, arg1, IPC_SET, 0, &s, 0); |
| 101 | set_fs(old_fs); |
| 102 | if (put_user (s.shm_perm.uid, &(p->shm_perm.uid)) || |
| 103 | __put_user (s.shm_perm.gid, &(p->shm_perm.gid)) || |
| 104 | __put_user (s.shm_perm.cuid, &(p->shm_perm.cuid)) || |
| 105 | __put_user (s.shm_perm.cgid, &(p->shm_perm.cgid)) || |
| 106 | __put_user (s.shm_perm.mode, &(p->shm_perm.mode)) || |
| 107 | __put_user (s.shm_perm.seq, &(p->shm_perm.seq)) || |
| 108 | __put_user (s.shm_perm.key, &(p->shm_perm.key)) || |
| 109 | __put_user (s.shm_segsz, &(p->shm_segsz)) || |
| 110 | __put_user (s.shm_lpid, &(p->shm_lpid)) || |
| 111 | __put_user (s.shm_cpid, &(p->shm_cpid)) || |
| 112 | __put_user (s.shm_nattch, &(p->shm_nattch)) || |
| 113 | __put_user (s.shm_atime, &(p->shm_atime)) || |
| 114 | __put_user (s.shm_dtime, &(p->shm_dtime)) || |
| 115 | __put_user (s.shm_ctime, &(p->shm_ctime))) |
| 116 | return -EFAULT; |
| 117 | return ret; |
| 118 | } |
| 119 | default: return -EINVAL; |
| 120 | } |
| 121 | case 2: /* shmdt */ |
| 122 | return sys_ipc(SHMDT, 0, 0, 0, A(arg1), 0); |
| 123 | case 3: /* shmget */ |
| 124 | return sys_ipc(SHMGET, arg1, arg2, arg3, NULL, 0); |
| 125 | } |
| 126 | return -EINVAL; |
| 127 | } |