ef04503da8
for passing to the bsd system calls, rather than inveninting our own equivalent structures.
453 lines
12 KiB
C
453 lines
12 KiB
C
/*-
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* Copyright (c) 1994-1995 Søren Schmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software withough specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: linux_file.c,v 1.4 1995/11/22 07:43:45 bde Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/fcntl.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/proc.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/exec.h>
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#include <sys/dirent.h>
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#include <ufs/ufs/dir.h>
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#include <i386/linux/linux.h>
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#include <i386/linux/sysproto.h>
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struct linux_creat_args {
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char *path;
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int mode;
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};
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int
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linux_creat(struct proc *p, struct linux_creat_args *args, int *retval)
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{
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struct open_args /* {
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char *path;
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int flags;
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int mode;
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} */ bsd_open_args;
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#ifdef DEBUG
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printf("Linux-emul(%d): creat(%s, %d)\n",
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p->p_pid, args->path, args->mode);
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#endif
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bsd_open_args.path = args->path;
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bsd_open_args.mode = args->mode;
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bsd_open_args.flags = O_WRONLY | O_CREAT | O_TRUNC;
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return open(p, &bsd_open_args, retval);
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}
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struct linux_open_args {
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char *path;
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int flags;
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int mode;
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};
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int
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linux_open(struct proc *p, struct linux_open_args *args, int *retval)
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{
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struct open_args /* {
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char *path;
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int flags;
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int mode;
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} */ bsd_open_args;
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int error;
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#ifdef DEBUG
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printf("Linux-emul(%d): open(%s, 0x%x, 0x%x)\n",
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p->p_pid, args->path, args->flags, args->mode);
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#endif
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bsd_open_args.flags = 0;
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if (args->flags & LINUX_O_RDONLY)
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bsd_open_args.flags |= O_RDONLY;
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if (args->flags & LINUX_O_WRONLY)
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bsd_open_args.flags |= O_WRONLY;
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if (args->flags & LINUX_O_RDWR)
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bsd_open_args.flags |= O_RDWR;
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if (args->flags & LINUX_O_NDELAY)
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bsd_open_args.flags |= O_NONBLOCK;
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if (args->flags & LINUX_O_APPEND)
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bsd_open_args.flags |= O_APPEND;
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if (args->flags & LINUX_O_SYNC)
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bsd_open_args.flags |= O_FSYNC;
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if (args->flags & LINUX_O_NONBLOCK)
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bsd_open_args.flags |= O_NONBLOCK;
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if (args->flags & LINUX_FASYNC)
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bsd_open_args.flags |= O_ASYNC;
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if (args->flags & LINUX_O_CREAT)
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bsd_open_args.flags |= O_CREAT;
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if (args->flags & LINUX_O_TRUNC)
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bsd_open_args.flags |= O_TRUNC;
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if (args->flags & LINUX_O_EXCL)
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bsd_open_args.flags |= O_EXCL;
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if (args->flags & LINUX_O_NOCTTY)
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bsd_open_args.flags |= O_NOCTTY;
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bsd_open_args.path = args->path;
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bsd_open_args.mode = args->mode;
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error = open(p, &bsd_open_args, retval);
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if (!error && !(bsd_open_args.flags & O_NOCTTY) &&
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SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
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struct filedesc *fdp = p->p_fd;
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struct file *fp = fdp->fd_ofiles[*retval];
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if (fp->f_type == DTYPE_VNODE)
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(fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, (caddr_t) 0, p);
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}
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return error;
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}
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struct linux_flock {
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short l_type;
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short l_whence;
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linux_off_t l_start;
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linux_off_t l_len;
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linux_pid_t l_pid;
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};
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static void
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linux_to_bsd_flock(struct linux_flock *linux_flock, struct flock *bsd_flock)
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{
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switch (linux_flock->l_type) {
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case LINUX_F_RDLCK:
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bsd_flock->l_type = F_RDLCK;
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break;
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case LINUX_F_WRLCK:
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bsd_flock->l_type = F_WRLCK;
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break;
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case LINUX_F_UNLCK:
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bsd_flock->l_type = F_UNLCK;
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break;
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}
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bsd_flock->l_whence = linux_flock->l_whence;
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bsd_flock->l_start = (off_t)linux_flock->l_start;
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bsd_flock->l_len = (off_t)linux_flock->l_len;
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bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
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}
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static void
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bsd_to_linux_flock(struct flock *bsd_flock, struct linux_flock *linux_flock)
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{
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switch (bsd_flock->l_type) {
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case F_RDLCK:
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linux_flock->l_type = LINUX_F_RDLCK;
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break;
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case F_WRLCK:
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linux_flock->l_type = LINUX_F_WRLCK;
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break;
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case F_UNLCK:
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linux_flock->l_type = LINUX_F_UNLCK;
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break;
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}
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linux_flock->l_whence = bsd_flock->l_whence;
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linux_flock->l_start = (linux_off_t)bsd_flock->l_start;
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linux_flock->l_len = (linux_off_t)bsd_flock->l_len;
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linux_flock->l_pid = (linux_pid_t)bsd_flock->l_pid;
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}
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struct linux_fcntl_args {
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int fd;
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int cmd;
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int arg;
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};
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int
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linux_fcntl(struct proc *p, struct linux_fcntl_args *args, int *retval)
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{
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int error, result;
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struct fcntl_args /* {
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int fd;
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int cmd;
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int arg;
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} */ fcntl_args;
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struct linux_flock linux_flock;
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struct flock *bsd_flock =
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(struct flock *)ua_alloc_init(sizeof(struct flock));
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#ifdef DEBUG
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printf("Linux-emul(%d): fcntl(%d, %08x, *)\n",
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p->p_pid, args->fd, args->cmd);
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#endif
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fcntl_args.fd = args->fd;
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fcntl_args.arg = 0;
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switch (args->cmd) {
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case LINUX_F_DUPFD:
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fcntl_args.cmd = F_DUPFD;
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return fcntl(p, &fcntl_args, retval);
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case LINUX_F_GETFD:
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fcntl_args.cmd = F_GETFD;
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return fcntl(p, &fcntl_args, retval);
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case LINUX_F_SETFD:
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fcntl_args.cmd = F_SETFD;
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return fcntl(p, &fcntl_args, retval);
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case LINUX_F_GETFL:
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fcntl_args.cmd = F_GETFL;
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error = fcntl(p, &fcntl_args, &result);
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*retval = 0;
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if (result & O_RDONLY) *retval |= LINUX_O_RDONLY;
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if (result & O_WRONLY) *retval |= LINUX_O_WRONLY;
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if (result & O_RDWR) *retval |= LINUX_O_RDWR;
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if (result & O_NDELAY) *retval |= LINUX_O_NONBLOCK;
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if (result & O_APPEND) *retval |= LINUX_O_APPEND;
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if (result & O_FSYNC) *retval |= LINUX_O_SYNC;
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return error;
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case LINUX_F_SETFL:
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if (args->arg & LINUX_O_NDELAY) fcntl_args.arg |= O_NONBLOCK;
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if (args->arg & LINUX_O_APPEND) fcntl_args.arg |= O_APPEND;
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if (args->arg & LINUX_O_SYNC) fcntl_args.arg |= O_FSYNC;
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fcntl_args.cmd = F_SETFL;
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return fcntl(p, &fcntl_args, retval);
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case LINUX_F_GETLK:
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if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
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sizeof(struct linux_flock))))
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return error;
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linux_to_bsd_flock(&linux_flock, bsd_flock);
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fcntl_args.cmd = F_GETLK;
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fcntl_args.arg = (int)bsd_flock;
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if (error = fcntl(p, &fcntl_args, retval))
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return error;
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bsd_to_linux_flock(bsd_flock, &linux_flock);
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return copyout((caddr_t)&linux_flock, (caddr_t)args->arg,
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sizeof(struct linux_flock));
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case LINUX_F_SETLK:
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if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
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sizeof(struct linux_flock))))
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return error;
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linux_to_bsd_flock(&linux_flock, bsd_flock);
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fcntl_args.cmd = F_SETLK;
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fcntl_args.arg = (int)bsd_flock;
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return fcntl(p, &fcntl_args, retval);
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case LINUX_F_SETLKW:
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if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
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sizeof(struct linux_flock))))
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return error;
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linux_to_bsd_flock(&linux_flock, bsd_flock);
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fcntl_args.cmd = F_SETLKW;
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fcntl_args.arg = (int)bsd_flock;
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return fcntl(p, &fcntl_args, retval);
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case LINUX_F_SETOWN:
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fcntl_args.cmd = F_SETOWN;
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return fcntl(p, &fcntl_args, retval);
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case LINUX_F_GETOWN:
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fcntl_args.cmd = F_GETOWN;
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return fcntl(p, &fcntl_args, retval);
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}
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return EINVAL;
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}
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struct linux_lseek_args {
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int fdes;
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unsigned long off;
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int whence;
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};
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int
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linux_lseek(struct proc *p, struct linux_lseek_args *args, int *retval)
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{
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struct lseek_args /* {
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int fd;
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int pad;
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off_t offset;
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int whence;
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} */ tmp_args;
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int error;
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#ifdef DEBUG
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printf("Linux-emul(%d): lseek(%d, %d, %d)\n",
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p->p_pid, args->fdes, args->off, args->whence);
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#endif
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tmp_args.fd = args->fdes;
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tmp_args.offset = (off_t)args->off;
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tmp_args.whence = args->whence;
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error = lseek(p, &tmp_args, retval);
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return error;
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}
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struct linux_dirent {
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long dino;
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linux_off_t doff;
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unsigned short dreclen;
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char dname[LINUX_NAME_MAX + 1];
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};
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#define LINUX_RECLEN(de,namlen) \
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ALIGN((((char *)&(de)->dname - (char *)de) + (namlen) + 1))
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struct linux_readdir_args {
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int fd;
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struct linux_dirent *dent;
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unsigned int count;
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};
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int
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linux_readdir(struct proc *p, struct linux_readdir_args *args, int *retval)
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{
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register struct dirent *bdp;
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struct vnode *vp;
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caddr_t inp, buf; /* BSD-format */
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int len, reclen; /* BSD-format */
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caddr_t outp; /* Linux-format */
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int resid, linuxreclen=0; /* Linux-format */
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struct file *fp;
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struct uio auio;
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struct iovec aiov;
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struct vattr va;
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off_t off;
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struct linux_dirent linux_dirent;
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int buflen, error, eofflag, nbytes, justone, blockoff;
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#ifdef DEBUG
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printf("Linux-emul(%d): readdir(%d, *, %d)\n",
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p->p_pid, args->fd, args->count);
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#endif
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if ((error = getvnode(p->p_fd, args->fd, &fp)) != 0) {
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return (error);
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}
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if ((fp->f_flag & FREAD) == 0)
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return (EBADF);
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vp = (struct vnode *) fp->f_data;
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if (vp->v_type != VDIR)
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return (EINVAL);
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if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) {
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return error;
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}
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nbytes = args->count;
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if (nbytes == 1) {
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nbytes = sizeof (struct linux_dirent);
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justone = 1;
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}
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else
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justone = 0;
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off = fp->f_offset;
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blockoff = off % DIRBLKSIZ;
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buflen = max(DIRBLKSIZ, nbytes + blockoff);
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buflen = min(buflen, MAXBSIZE);
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buf = malloc(buflen, M_TEMP, M_WAITOK);
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VOP_LOCK(vp);
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again:
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aiov.iov_base = buf;
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aiov.iov_len = buflen;
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auio.uio_iov = &aiov;
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auio.uio_iovcnt = 1;
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auio.uio_rw = UIO_READ;
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auio.uio_segflg = UIO_SYSSPACE;
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auio.uio_procp = p;
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auio.uio_resid = buflen;
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auio.uio_offset = off - (off_t)blockoff;
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error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (int *) NULL,
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(u_int **) NULL);
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if (error) {
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goto out;
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}
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inp = buf;
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inp += blockoff;
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outp = (caddr_t) args->dent;
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resid = nbytes;
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if ((len = buflen - auio.uio_resid - blockoff) == 0) {
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goto eof;
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}
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while (len > 0) {
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bdp = (struct dirent *) inp;
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reclen = bdp->d_reclen;
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if (reclen & 3) {
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printf("linux_readdir: reclen=%d\n", reclen);
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error = EFAULT;
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goto out;
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}
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if (bdp->d_fileno == 0) {
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inp += reclen;
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off += reclen;
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len -= reclen;
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continue;
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}
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linuxreclen = LINUX_RECLEN(&linux_dirent, bdp->d_namlen);
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if (reclen > len || resid < linuxreclen) {
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outp++;
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break;
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}
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linux_dirent.dino = (long) bdp->d_fileno;
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linux_dirent.doff = (linux_off_t) linuxreclen;
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linux_dirent.dreclen = (u_short) bdp->d_namlen;
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strcpy(linux_dirent.dname, bdp->d_name);
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if ((error = copyout((caddr_t)&linux_dirent, outp, linuxreclen))) {
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goto out;
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}
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inp += reclen;
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off += reclen;
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outp += linuxreclen;
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resid -= linuxreclen;
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len -= reclen;
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if (justone)
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break;
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}
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if (outp == (caddr_t) args->dent)
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goto again;
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fp->f_offset = off;
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if (justone)
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nbytes = resid + linuxreclen;
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eof:
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*retval = nbytes - resid;
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out:
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VOP_UNLOCK(vp);
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free(buf, M_TEMP);
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return error;
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}
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