sys_sunos.c

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	int        retrans;    /* times to retry send */
	char       *hostname;  /* server's hostname */
	int        acregmin;   /* attr cache file min secs */
	int        acregmax;   /* attr cache file max secs */
	int        acdirmin;   /* attr cache dir min secs */
	int        acdirmax;   /* attr cache dir max secs */
	char       *netname;   /* server's netname */
};


extern dev_t get_unnamed_dev(void);
extern void put_unnamed_dev(dev_t);
extern asmlinkage int sys_connect(int fd, struct sockaddr *uservaddr, int addrlen);
extern asmlinkage int sys_socket(int family, int type, int protocol);
extern asmlinkage int sys_bind(int fd, struct sockaddr *umyaddr, int addrlen);


/* Bind the socket on a local reserved port and connect it to the
 * remote server.  This on Linux/i386 is done by the mount program,
 * not by the kernel.
 */
static int
sunos_nfs_get_server_fd (int fd, struct sockaddr_in *addr)
{
	struct sockaddr_in local;
	struct sockaddr_in server;
	int    try_port;
	struct socket *socket;
	struct inode  *inode;
	struct file   *file;
	int    ret, result = 0;

	file = fget(fd);
	if (!file)
		goto out;

	inode = file->f_dentry->d_inode;

	socket = &inode->u.socket_i;
	local.sin_family = AF_INET;
	local.sin_addr.s_addr = INADDR_ANY;

	/* IPPORT_RESERVED = 1024, can't find the definition in the kernel */
	try_port = 1024;
	do {
		local.sin_port = htons (--try_port);
		ret = socket->ops->bind(socket, (struct sockaddr*)&local,
					sizeof(local));
	} while (ret && try_port > (1024 / 2));

	if (ret)
		goto out_putf;

	server.sin_family = AF_INET;
	server.sin_addr = addr->sin_addr;
	server.sin_port = NFS_PORT;

	/* Call sys_connect */
	ret = socket->ops->connect (socket, (struct sockaddr *) &server,
				    sizeof (server), file->f_flags);
	if (ret >= 0)
		result = 1;

out_putf:
	fput(file);
out:
	return result;
}

static int get_default (int value, int def_value)
{
    if (value)
	return value;
    else
	return def_value;
}

static int sunos_nfs_mount(char *dir_name, int linux_flags, void *data)
{
	int  server_fd;
	char *the_name;
	struct nfs_mount_data linux_nfs_mount;
	struct sunos_nfs_mount_args sunos_mount;

	/* Ok, here comes the fun part: Linux's nfs mount needs a
	 * socket connection to the server, but SunOS mount does not
	 * require this, so we use the information on the destination
	 * address to create a socket and bind it to a reserved
	 * port on this system
	 */
	if (copy_from_user(&sunos_mount, data, sizeof(sunos_mount)))
		return -EFAULT;

	server_fd = sys_socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (server_fd < 0)
		return -ENXIO;

	if (copy_from_user(&linux_nfs_mount.addr,sunos_mount.addr,
				sizeof(*sunos_mount.addr)) ||
	    copy_from_user(&linux_nfs_mount.root,sunos_mount.fh,
				sizeof(*sunos_mount.fh))) {
		sys_close (server_fd);
		return -EFAULT;
	}

	if (!sunos_nfs_get_server_fd (server_fd, &linux_nfs_mount.addr)){
		sys_close (server_fd);
		return -ENXIO;
	}

	/* Now, bind it to a locally reserved port */
	linux_nfs_mount.version  = NFS_MOUNT_VERSION;
	linux_nfs_mount.flags    = sunos_mount.flags;
	linux_nfs_mount.fd       = server_fd;
	
	linux_nfs_mount.rsize    = get_default (sunos_mount.rsize, 8192);
	linux_nfs_mount.wsize    = get_default (sunos_mount.wsize, 8192);
	linux_nfs_mount.timeo    = get_default (sunos_mount.timeo, 10);
	linux_nfs_mount.retrans  = sunos_mount.retrans;
	
	linux_nfs_mount.acregmin = sunos_mount.acregmin;
	linux_nfs_mount.acregmax = sunos_mount.acregmax;
	linux_nfs_mount.acdirmin = sunos_mount.acdirmin;
	linux_nfs_mount.acdirmax = sunos_mount.acdirmax;

	the_name = getname(sunos_mount.hostname);
	if(IS_ERR(the_name))
		return PTR_ERR(the_name);

	strncpy (linux_nfs_mount.hostname, the_name, 254);
	linux_nfs_mount.hostname [255] = 0;
	putname (the_name);
	
	return do_mount ("", dir_name, "nfs", linux_flags, &linux_nfs_mount);
}

asmlinkage int
sunos_mount(char *type, char *dir, int flags, void *data)
{
	int linux_flags = MS_MGC_MSK; /* new semantics */
	int ret = -EINVAL;
	char *dev_fname = 0;
	char *dir_page, *type_page;

	if (!capable (CAP_SYS_ADMIN))
		return -EPERM;
		
	lock_kernel();
	/* We don't handle the integer fs type */
	if ((flags & SMNT_NEWTYPE) == 0)
		goto out;

	/* Do not allow for those flags we don't support */
	if (flags & (SMNT_GRPID|SMNT_NOSUB|SMNT_MULTI|SMNT_SYS5))
		goto out;

	if(flags & SMNT_REMOUNT)
		linux_flags |= MS_REMOUNT;
	if(flags & SMNT_RDONLY)
		linux_flags |= MS_RDONLY;
	if(flags & SMNT_NOSUID)
		linux_flags |= MS_NOSUID;

	dir_page = getname(dir);
	ret = PTR_ERR(dir_page);
	if (IS_ERR(dir_page))
		goto out;

	type_page = getname(type);
	ret = PTR_ERR(type_page);
	if (IS_ERR(type_page))
		goto out1;

	if(strcmp(type_page, "ext2") == 0) {
		dev_fname = getname(data);
	} else if(strcmp(type_page, "iso9660") == 0) {
		dev_fname = getname(data);
	} else if(strcmp(type_page, "minix") == 0) {
		dev_fname = getname(data);
	} else if(strcmp(type_page, "nfs") == 0) {
		ret = sunos_nfs_mount (dir_page, flags, data);
		goto out2;
        } else if(strcmp(type_page, "ufs") == 0) {
		printk("Warning: UFS filesystem mounts unsupported.\n");
		ret = -ENODEV;
		goto out2;
	} else if(strcmp(type_page, "proc")) {
		ret = -ENODEV;
		goto out2;
	}
	ret = PTR_ERR(dev_fname);
	if (IS_ERR(dev_fname))
		goto out2;
	ret = do_mount(dev_fname, dir_page, type_page, linux_flags, NULL);
	if (dev_fname)
		putname(dev_fname);
out2:
	putname(type_page);
out1:
	putname(dir_page);
out:
	unlock_kernel();
	return ret;
}

extern asmlinkage int sys_setsid(void);
extern asmlinkage int sys_setpgid(pid_t, pid_t);

asmlinkage int sunos_setpgrp(pid_t pid, pid_t pgid)
{
	int ret;

	/* So stupid... */
	if((!pid || pid == current->pid) &&
	   !pgid) {
		sys_setsid();
		ret = 0;
	} else {
		ret = sys_setpgid(pid, pgid);
	}
	return ret;
}

/* So stupid... */
extern asmlinkage int sys_wait4(pid_t, unsigned int *, int, struct rusage *);
asmlinkage int sunos_wait4(pid_t pid, unsigned int *stat_addr, int options, struct rusage *ru)
{
	int ret;

	ret = sys_wait4((pid ? pid : -1), stat_addr, options, ru);
	return ret;
}

extern int kill_pg(int, int, int);
asmlinkage int sunos_killpg(int pgrp, int sig)
{
	int ret;

	lock_kernel();
	ret = kill_pg(pgrp, sig, 0);
	unlock_kernel();
	return ret;
}

asmlinkage int sunos_audit(void)
{
	lock_kernel();
	printk ("sys_audit\n");
	unlock_kernel();
	return -1;
}

extern asmlinkage unsigned long sunos_gethostid(void)
{
	unsigned long ret;

	lock_kernel();
	ret = ((unsigned long)idprom->id_machtype << 24) |
		(unsigned long)idprom->id_sernum;
	unlock_kernel();
	return ret;
}

/* sysconf options, for SunOS compatibility */
#define   _SC_ARG_MAX             1
#define   _SC_CHILD_MAX           2
#define   _SC_CLK_TCK             3
#define   _SC_NGROUPS_MAX         4
#define   _SC_OPEN_MAX            5
#define   _SC_JOB_CONTROL         6
#define   _SC_SAVED_IDS           7
#define   _SC_VERSION             8

extern asmlinkage long sunos_sysconf (int name)
{
	long ret;

	switch (name){
	case _SC_ARG_MAX:
		ret = ARG_MAX;
		break;
	case _SC_CHILD_MAX:
		ret = CHILD_MAX;
		break;
	case _SC_CLK_TCK:
		ret = HZ;
		break;
	case _SC_NGROUPS_MAX:
		ret = NGROUPS_MAX;
		break;
	case _SC_OPEN_MAX:
		ret = OPEN_MAX;
		break;
	case _SC_JOB_CONTROL:
		ret = 1;	/* yes, we do support job control */
		break;
	case _SC_SAVED_IDS:
		ret = 1;	/* yes, we do support saved uids  */
		break;
	case _SC_VERSION:
		/* mhm, POSIX_VERSION is in /usr/include/unistd.h
		 * should it go on /usr/include/linux?
		 */
		ret = 199009L; 
		break;
	default:
		ret = -1;
		break;
	};
	return ret;
}

asmlinkage int sunos_semsys(int op, unsigned long arg1, unsigned long arg2,
			    unsigned long arg3, void *ptr)
{
	union semun arg4;
	int ret;

	switch (op) {
	case 0:
		/* Most arguments match on a 1:1 basis but cmd doesn't */
		switch(arg3) {
		case 4:
			arg3=GETPID; break;
		case 5:
			arg3=GETVAL; break;
		case 6:
			arg3=GETALL; break;
		case 3:
			arg3=GETNCNT; break;
		case 7:
			arg3=GETZCNT; break;
		case 8:
			arg3=SETVAL; break;
		case 9:
			arg3=SETALL; break;
		}
		/* sys_semctl(): */
		arg4.__pad=ptr; /* value to modify semaphore to */
		ret = sys_semctl((int)arg1, (int)arg2, (int)arg3, arg4 );
		break;
	case 1:
		/* sys_semget(): */
		ret = sys_semget((key_t)arg1, (int)arg2, (int)arg3);
		break;
	case 2:
		/* sys_semop(): */
		ret = sys_semop((int)arg1, (struct sembuf *)arg2, (unsigned)arg3);
		break;
	default:
		ret = -EINVAL;
		break;
	};
	return ret;
}

asmlinkage int sunos_msgsys(int op, unsigned long arg1, unsigned long arg2,
			    unsigned long arg3, unsigned long arg4)
{
	struct sparc_stackf *sp;
	unsigned long arg5;
	int rval;

	switch(op) {
	case 0:
		rval = sys_msgget((key_t)arg1, (int)arg2);
		break;
	case 1:
		rval = sys_msgctl((int)arg1, (int)arg2,
				  (struct msqid_ds *)arg3);
		break;
	case 2:
		lock_kernel();
		sp = (struct sparc_stackf *)current->thread.kregs->u_regs[UREG_FP];
		arg5 = sp->xxargs[0];
		unlock_kernel();
		rval = sys_msgrcv((int)arg1, (struct msgbuf *)arg2,
				  (size_t)arg3, (long)arg4, (int)arg5);
		break;
	case 3:
		rval = sys_msgsnd((int)arg1, (struct msgbuf *)arg2,
				  (size_t)arg3, (int)arg4);
		break;
	default:
		rval = -EINVAL;
		break;
	}
	return rval;
}

asmlinkage int sunos_shmsys(int op, unsigned long arg1, unsigned long arg2,
			    unsigned long arg3)
{
	unsigned long raddr;
	int rval;

	switch(op) {
	case 0:
		/* sys_shmat(): attach a shared memory area */
		rval = sys_shmat((int)arg1,(char *)arg2,(int)arg3,&raddr);
		if(!rval)
			rval = (int) raddr;
		break;
	case 1:
		/* sys_shmctl(): modify shared memory area attr. */
		rval = sys_shmctl((int)arg1,(int)arg2,(struct shmid_ds *)arg3);
		break;
	case 2:
		/* sys_shmdt(): detach a shared memory area */
		rval = sys_shmdt((char *)arg1);
		break;
	case 3:
		/* sys_shmget(): get a shared memory area */
		rval = sys_shmget((key_t)arg1,(int)arg2,(int)arg3);
		break;
	default:
		rval = -EINVAL;
		break;
	};
	return rval;
}

#define SUNOS_EWOULDBLOCK 35

/* see the sunos man page read(2v) for an explanation
   of this garbage. We use O_NDELAY to mark
   file descriptors that have been set non-blocking 
   using 4.2BSD style calls. (tridge) */

static inline int check_nonblock(int ret, int fd)
{
	if (ret == -EAGAIN) {
		struct file * file = fget(fd);
		if (file) {
			if (file->f_flags & O_NDELAY)
				ret = -SUNOS_EWOULDBLOCK;
			fput(file);
		}
	}
	return ret;
}

extern asmlinkage int sys_read(unsigned int fd,char *buf,int count);
extern asmlinkage int sys_write(unsigned int fd,char *buf,int count);
extern asmlinkage int sys_recv(int fd, void * ubuf, int size, unsigned flags);
extern asmlinkage int sys_send(int fd, void * buff, int len, unsigned flags);
extern asmlinkage int sys_accept(int fd, struct sockaddr *sa, int *addrlen);
extern asmlinkage int sys_readv(unsigned long fd, const struct iovec * vector, long count);
extern asmlinkage int sys_writev(unsigned long fd, const struct iovec * vector, long count);


asmlinkage int sunos_read(unsigned int fd,char *buf,int count)
{
	int ret;

	ret = check_nonblock(sys_read(fd,buf,count),fd);
	return ret;
}

asmlinkage int sunos_readv(unsigned long fd, const struct iovec * vector, long count)
{
	int ret;

	ret = check_nonblock(sys_readv(fd,vector,count),fd);
	return ret;
}

asmlinkage int sunos_write(unsigned int fd,char *buf,int count)
{
	int ret;

	ret = check_nonblock(sys_write(fd,buf,count),fd);
	return ret;
}

asmlinkage int sunos_writev(unsigned long fd, const struct iovec * vector, long count)
{
	int ret;

	ret = check_nonblock(sys_writev(fd,vector,count),fd);
	return ret;
}

asmlinkage int sunos_recv(int fd, void * ubuf, int size, unsigned flags)
{
	int ret;

	ret = check_nonblock(sys_recv(fd,ubuf,size,flags),fd);
	return ret;
}

asmlinkage int sunos_send(int fd, void * buff, int len, unsigned flags)
{
	int ret;

	ret = check_nonblock(sys_send(fd,buff,len,flags),fd);
	return ret;
}

extern asmlinkage int sys_setsockopt(int fd, int level, int optname,
				     char *optval, int optlen);

asmlinkage int sunos_socket(int family, int type, int protocol)
{
	int ret, one = 1;

	ret = sys_socket(family, type, protocol);
	if (ret < 0)
		goto out;

	sys_setsockopt(ret, SOL_SOCKET, SO_BSDCOMPAT,
		       (char *)&one, sizeof(one));
out:
	return ret;
}

asmlinkage int sunos_accept(int fd, struct sockaddr *sa, int *addrlen)
{
	int ret, one = 1;

	while (1) {
		ret = check_nonblock(sys_accept(fd,sa,addrlen),fd);	
		if (ret != -ENETUNREACH && ret != -EHOSTUNREACH)
			break;
	}
	if (ret < 0)
		goto out;

	sys_setsockopt(ret, SOL_SOCKET, SO_BSDCOMPAT,
		       (char *)&one, sizeof(one));
out:
	return ret;
}

#define SUNOS_SV_INTERRUPT 2

asmlinkage int
sunos_sigaction(int sig, const struct old_sigaction *act,
		struct old_sigaction *oact)
{
	struct k_sigaction new_ka, old_ka;
	int ret;

	if(act) {
		old_sigset_t mask;

		if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
		    __get_user(new_ka.sa.sa_flags, &act->sa_flags))
			return -EFAULT;
		__get_user(mask, &act->sa_mask);
		new_ka.sa.sa_restorer = NULL;
		new_ka.ka_restorer = NULL;
		siginitset(&new_ka.sa.sa_mask, mask);
		new_ka.sa.sa_flags ^= SUNOS_SV_INTERRUPT;
	}

	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);

	if (!ret && oact) {
		/* In the clone() case we could copy half consistant
		 * state to the user, however this could sleep and
		 * deadlock us if we held the signal lock on SMP.  So for
		 * now I take the easy way out and do no locking.
		 * But then again we don't support SunOS lwp's anyways ;-)
		 */
		old_ka.sa.sa_flags ^= SUNOS_SV_INTERRUPT;
		if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags))
			 return -EFAULT;
		__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
	}

	return ret;
}


extern asmlinkage int sys_setsockopt(int fd, int level, int optname, char *optval, int optlen);
extern asmlinkage int sys_getsockopt(int fd, int level, int optname, char *optval, int *optlen);

asmlinkage int sunos_setsockopt(int fd, int level, int optname, char *optval,
				int optlen)
{
	int tr_opt = optname;
	int ret;

	if (level == SOL_IP) {
		/* Multicast socketopts (ttl, membership) */
		if (tr_opt >=2 && tr_opt <= 6)
			tr_opt += 30;
	}
	ret = sys_setsockopt(fd, level, tr_opt, optval, optlen);
	return ret;
}

asmlinkage int sunos_getsockopt(int fd, int level, int optname, char *optval,
				int *optlen)
{
	int tr_opt = optname;
	int ret;

	if (level == SOL_IP) {
		/* Multicast socketopts (ttl, membership) */
		if (tr_opt >=2 && tr_opt <= 6)
			tr_opt += 30;
	}
	ret = sys_getsockopt(fd, level, tr_opt, optval, optlen);
	return ret;
}