ipc.c
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- /* $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/smp_lock.h>
- #include <linux/wait.h>
- #include <linux/mm.h>
- #include <linux/shm.h>
- #include <linux/sem.h>
- #include <linux/msg.h>
- #include <asm/uaccess.h>
- #include <asm/string.h>
- #include <asm/ipc.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 *,long) =
- (int (*)(unsigned,int,int,unsigned long,void *,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, (void *)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;
-
- if (get_user (s.shm_perm.uid, &(((struct solaris_shmid_ds *)A(arg3))->shm_perm.uid)) ||
- __get_user (s.shm_perm.gid, &(((struct solaris_shmid_ds *)A(arg3))->shm_perm.gid)) ||
- __get_user (s.shm_perm.mode, &(((struct solaris_shmid_ds *)A(arg3))->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;
-
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- ret = sys_ipc(SHMCTL, arg1, IPC_SET, 0, &s, 0);
- set_fs(old_fs);
- if (get_user (s.shm_perm.uid, &(((struct solaris_shmid_ds *)A(arg3))->shm_perm.uid)) ||
- __get_user (s.shm_perm.gid, &(((struct solaris_shmid_ds *)A(arg3))->shm_perm.gid)) ||
- __get_user (s.shm_perm.cuid, &(((struct solaris_shmid_ds *)A(arg3))->shm_perm.cuid)) ||
- __get_user (s.shm_perm.cgid, &(((struct solaris_shmid_ds *)A(arg3))->shm_perm.cgid)) ||
- __get_user (s.shm_perm.mode, &(((struct solaris_shmid_ds *)A(arg3))->shm_perm.mode)) ||
- __get_user (s.shm_perm.seq, &(((struct solaris_shmid_ds *)A(arg3))->shm_perm.seq)) ||
- __get_user (s.shm_perm.key, &(((struct solaris_shmid_ds *)A(arg3))->shm_perm.key)) ||
- __get_user (s.shm_segsz, &(((struct solaris_shmid_ds *)A(arg3))->shm_segsz)) ||
- __get_user (s.shm_lpid, &(((struct solaris_shmid_ds *)A(arg3))->shm_lpid)) ||
- __get_user (s.shm_cpid, &(((struct solaris_shmid_ds *)A(arg3))->shm_cpid)) ||
- __get_user (s.shm_nattch, &(((struct solaris_shmid_ds *)A(arg3))->shm_nattch)) ||
- __get_user (s.shm_atime, &(((struct solaris_shmid_ds *)A(arg3))->shm_atime)) ||
- __get_user (s.shm_dtime, &(((struct solaris_shmid_ds *)A(arg3))->shm_dtime)) ||
- __get_user (s.shm_ctime, &(((struct solaris_shmid_ds *)A(arg3))->shm_ctime)))
- return -EFAULT;
- return ret;
- }
- default: return -EINVAL;
- }
- case 2: /* shmdt */
- return sys_ipc(SHMDT, 0, 0, 0, (void *)A(arg1), 0);
- case 3: /* shmget */
- return sys_ipc(SHMGET, arg1, arg2, arg3, NULL, 0);
- }
- return -EINVAL;
- }