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   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 }