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ipc.c

/* $Id: ipc.c,v 1.5 1999/12/09 00:41:00 davem Exp $
 * ipc.c: Solaris IPC emulation
 *
 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/shm.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/ipc.h>

#include <asm/uaccess.h>
#include <asm/string.h>

#include "conv.h"

struct solaris_ipc_perm {
      s32   uid;
      s32   gid;
      s32   cuid;
      s32   cgid;
      u32   mode;
      u32   seq;
      int   key;
      s32   pad[4];
};

struct solaris_shmid_ds {
      struct solaris_ipc_perm shm_perm;
      int               shm_segsz;
      u32               shm_amp;
      unsigned short          shm_lkcnt;
      char              __padxx[2];
      s32               shm_lpid;
      s32               shm_cpid;
      u32               shm_nattch;
      u32               shm_cnattch;
      s32               shm_atime;
      s32               shm_pad1;
      s32               shm_dtime;
      s32               shm_pad2;
      s32               shm_ctime;
      s32               shm_pad3;
      unsigned short          shm_cv;
      char              shm_pad4[2];
      u32               shm_sptas;
      s32               shm_pad5[2];
};

asmlinkage long solaris_shmsys(int cmd, u32 arg1, u32 arg2, u32 arg3)
{
      int (*sys_ipc)(unsigned,int,int,unsigned long,void __user *,long) = 
            (int (*)(unsigned,int,int,unsigned long,void __user *,long))SYS(ipc);
      mm_segment_t old_fs;
      unsigned long raddr;
      int ret;
            
      switch (cmd) {
      case 0: /* shmat */
            old_fs = get_fs();
            set_fs(KERNEL_DS);
            ret = sys_ipc(SHMAT, arg1, arg3 & ~0x4000, (unsigned long)&raddr, A(arg2), 0);
            set_fs(old_fs);
            if (ret >= 0) return (u32)raddr;
            else return ret;
      case 1: /* shmctl */
            switch (arg2) {
            case 3: /* SHM_LOCK */
            case 4: /* SHM_UNLOCK */
                  return sys_ipc(SHMCTL, arg1, (arg2 == 3) ? SHM_LOCK : SHM_UNLOCK, 0, NULL, 0);
            case 10: /* IPC_RMID */
                  return sys_ipc(SHMCTL, arg1, IPC_RMID, 0, NULL, 0);
            case 11: /* IPC_SET */
                  {
                        struct shmid_ds s;
                        struct solaris_shmid_ds __user *p = A(arg3);
                        
                        if (get_user (s.shm_perm.uid, &p->shm_perm.uid) ||
                            __get_user (s.shm_perm.gid, &p->shm_perm.gid) || 
                            __get_user (s.shm_perm.mode, &p->shm_perm.mode))
                              return -EFAULT;
                        old_fs = get_fs();
                        set_fs(KERNEL_DS);
                        ret = sys_ipc(SHMCTL, arg1, IPC_SET, 0, &s, 0);
                        set_fs(old_fs);
                        return ret;
                  }
            case 12: /* IPC_STAT */
                  {
                        struct shmid_ds s;
                        struct solaris_shmid_ds __user *p = A(arg3);
                        
                        old_fs = get_fs();
                        set_fs(KERNEL_DS);
                        ret = sys_ipc(SHMCTL, arg1, IPC_SET, 0, &s, 0);
                        set_fs(old_fs);
                        if (put_user (s.shm_perm.uid, &(p->shm_perm.uid)) ||
                            __put_user (s.shm_perm.gid, &(p->shm_perm.gid)) || 
                            __put_user (s.shm_perm.cuid, &(p->shm_perm.cuid)) ||
                            __put_user (s.shm_perm.cgid, &(p->shm_perm.cgid)) || 
                            __put_user (s.shm_perm.mode, &(p->shm_perm.mode)) ||
                            __put_user (s.shm_perm.seq, &(p->shm_perm.seq)) ||
                            __put_user (s.shm_perm.key, &(p->shm_perm.key)) ||
                            __put_user (s.shm_segsz, &(p->shm_segsz)) ||
                            __put_user (s.shm_lpid, &(p->shm_lpid)) ||
                            __put_user (s.shm_cpid, &(p->shm_cpid)) ||
                            __put_user (s.shm_nattch, &(p->shm_nattch)) ||
                            __put_user (s.shm_atime, &(p->shm_atime)) ||
                            __put_user (s.shm_dtime, &(p->shm_dtime)) ||
                            __put_user (s.shm_ctime, &(p->shm_ctime)))
                              return -EFAULT;
                        return ret;
                  }
            default: return -EINVAL;
            }
      case 2: /* shmdt */
            return sys_ipc(SHMDT, 0, 0, 0, A(arg1), 0);
      case 3: /* shmget */
            return sys_ipc(SHMGET, arg1, arg2, arg3, NULL, 0);
      }
      return -EINVAL;
}

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