freebsd-dev/sys/i386/ibcs2/ibcs2_file.c
Søren Schmidt 45d04cf11f Fix bug around VOP_READDIR, now takes 6 parameters not 4.
The MAXBSIZE has changed, so use DEFAULT_PAGE_SIZE instead.
1994-12-14 22:03:48 +00:00

526 lines
14 KiB
C

/*-
* Copyright (c) 1994 Søren Schmidt
* Copyright (c) 1994 Sean Eric Fagan
* All rights reserved.
*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: ibcs2_file.c,v 1.1 1994/10/14 08:53:01 sos Exp $
*/
#include <i386/ibcs2/ibcs2.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/malloc.h>
#include <sys/exec.h>
#include <vm/vm.h>
#include <ufs/ufs/dir.h>
struct ibcs2_close_args {
int fd;
};
int
ibcs2_close(struct proc *p, struct ibcs2_close_args *args, int *retval)
{
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("IBCS2: 'close' fd=%d\n", args->fd);
return close(p, args, retval);
}
struct ibcs2_creat_args {
char *fname;
int fmode;
};
int
ibcs2_creat(struct proc *p, struct ibcs2_creat_args *args, int *retval)
{
struct args {
char *fname;
int mode;
int crtmode;
} bsd_open_args;
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("IBCS2: 'creat' name=%s, mode=%x\n",
args->fname, args->fmode);
bsd_open_args.fname = args->fname;
bsd_open_args.crtmode = args->fmode;
bsd_open_args.mode = O_WRONLY | O_CREAT | O_TRUNC;
return open(p, &bsd_open_args, retval);
}
int
ibcs2_dup(struct proc *p, void *args, int *retval)
{
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("IBCS2: 'dup'\n");
return dup(p, args, retval);
}
struct ibcs2_flock {
short l_type;
short l_whence;
ibcs2_off_t l_start;
ibcs2_off_t l_len;
short l_sysid;
ibcs2_pid_t l_pid;
};
static void
ibcs2_to_bsd_flock(struct ibcs2_flock *ibcs2_flock, struct flock *bsd_flock)
{
switch (ibcs2_flock->l_type) {
case IBCS2_F_RDLCK:
bsd_flock->l_type = F_RDLCK;
break;
case IBCS2_F_WRLCK:
bsd_flock->l_type = F_WRLCK;
break;
case IBCS2_F_UNLCK:
bsd_flock->l_type = F_UNLCK;
break;
}
bsd_flock->l_whence = ibcs2_flock->l_whence;
bsd_flock->l_start = (off_t)ibcs2_flock->l_start;
bsd_flock->l_len = (off_t)ibcs2_flock->l_len;
bsd_flock->l_pid = (pid_t)ibcs2_flock->l_pid;
}
static void
bsd_to_ibcs2_flock(struct flock *bsd_flock, struct ibcs2_flock *ibcs2_flock)
{
switch (bsd_flock->l_type) {
case F_RDLCK:
ibcs2_flock->l_type = IBCS2_F_RDLCK;
break;
case F_WRLCK:
ibcs2_flock->l_type = IBCS2_F_WRLCK;
break;
case F_UNLCK:
ibcs2_flock->l_type = IBCS2_F_UNLCK;
break;
}
ibcs2_flock->l_whence = bsd_flock->l_whence;
ibcs2_flock->l_start = (ibcs2_off_t)bsd_flock->l_start;
ibcs2_flock->l_len = (ibcs2_off_t)bsd_flock->l_len;
ibcs2_flock->l_sysid = 0;
ibcs2_flock->l_pid = (ibcs2_pid_t)bsd_flock->l_pid;
}
struct ibcs2_fcntl_args {
int fd;
int cmd;
int arg;
};
int
ibcs2_fcntl(struct proc *p, struct ibcs2_fcntl_args *args, int *retval)
{
int error, result;
struct fcntl_args {
int fd;
int cmd;
int arg;
} fcntl_args;
struct ibcs2_flock ibcs2_flock;
struct flock *bsd_flock = (struct flock *)UA_ALLOC();
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("IBCS2: 'fcntl' fd=%d, cmd=%d arg=%d\n",
args->fd, args->cmd, args->arg);
fcntl_args.fd = args->fd;
fcntl_args.arg = 0;
switch (args->cmd) {
case IBCS2_F_DUPFD:
fcntl_args.cmd = F_DUPFD;
return fcntl(p, &fcntl_args, retval);
case IBCS2_F_GETFD:
fcntl_args.cmd = F_GETFD;
return fcntl(p, &fcntl_args, retval);
case IBCS2_F_SETFD:
fcntl_args.cmd = F_SETFD;
return fcntl(p, &fcntl_args, retval);
case IBCS2_F_GETFL:
fcntl_args.cmd = F_GETFL;
error = fcntl(p, &fcntl_args, &result);
*retval = 0;
if (result & O_RDONLY) *retval |= IBCS2_RDONLY;
if (result & O_WRONLY) *retval |= IBCS2_WRONLY;
if (result & O_RDWR) *retval |= IBCS2_RDWR;
if (result & O_NDELAY) *retval |= IBCS2_NONBLOCK;
if (result & O_APPEND) *retval |= IBCS2_APPEND;
if (result & O_FSYNC) *retval |= IBCS2_SYNC;
return error;
case IBCS2_F_SETFL:
if (args->arg & IBCS2_NDELAY) fcntl_args.arg |= O_NONBLOCK;
if (args->arg & IBCS2_APPEND) fcntl_args.arg |= O_APPEND;
if (args->arg & IBCS2_SYNC) fcntl_args.arg |= O_FSYNC;
fcntl_args.cmd = F_SETFL;
return fcntl(p, &fcntl_args, retval);
case IBCS2_F_GETLK:
if ((error = copyin((caddr_t)args->arg, (caddr_t)&ibcs2_flock,
sizeof(struct ibcs2_flock))))
return error;
ibcs2_to_bsd_flock(&ibcs2_flock, bsd_flock);
fcntl_args.cmd = F_GETLK;
fcntl_args.arg = (int)bsd_flock;
if (error = fcntl(p, &fcntl_args, retval))
return error;
bsd_to_ibcs2_flock(bsd_flock, &ibcs2_flock);
return copyout((caddr_t)&ibcs2_flock, (caddr_t)args->arg,
sizeof(struct ibcs2_flock));
case IBCS2_F_SETLK:
if ((error = copyin((caddr_t)args->arg, (caddr_t)&ibcs2_flock,
sizeof(struct ibcs2_flock))))
return error;
ibcs2_to_bsd_flock(&ibcs2_flock, bsd_flock);
fcntl_args.cmd = F_SETLK;
fcntl_args.arg = (int)bsd_flock;
return fcntl(p, &fcntl_args, retval);
case IBCS2_F_SETLKW:
if ((error = copyin((caddr_t)args->arg, (caddr_t)&ibcs2_flock,
sizeof(struct ibcs2_flock))))
return error;
ibcs2_to_bsd_flock(&ibcs2_flock, bsd_flock);
fcntl_args.cmd = F_SETLKW;
fcntl_args.arg = (int)bsd_flock;
return fcntl(p, &fcntl_args, retval);
}
return EINVAL;
}
struct ibcs2_dirent {
ibcs2_ino_t d_ino;
ibcs2_off_t d_off;
unsigned short d_reclen;
char d_name[256];
};
struct ibcs2_getdents_args {
int fd;
char *buf;
int nbytes;
};
#define BSD_DIRENT(cp) ((struct direct *)(cp))
#define IBCS2_RECLEN(p) \
(((2*sizeof(long)+sizeof(short)+BSD_DIRENT(p)->d_namlen+1)+3)&~3)
int
ibcs2_getdents(struct proc *p, struct ibcs2_getdents_args *args, int *retval)
{
struct vnode *vp;
struct ibcs2_dirent dir;
struct file *fp;
struct uio auio;
struct iovec aiov;
off_t off;
caddr_t inp, buf, outp;
int len, reclen, resid;
int buflen, error, eofflag;
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("IBCS2: 'getdents' fd = %d, size = %d\n",
args->fd, args->nbytes);
if ((error = getvnode(p->p_fd, args->fd, &fp)) != 0)
return error;
if ((fp->f_flag & FREAD) == 0)
return EBADF;
vp = (struct vnode *)fp->f_data;
if (vp->v_type != VDIR)
return EINVAL;
buflen = min(DEFAULT_PAGE_SIZE, max(DIRBLKSIZ, args->nbytes));
buf = malloc(buflen, M_TEMP, M_WAITOK);
VOP_LOCK(vp);
off = fp->f_offset;
again:
aiov.iov_base = buf;
aiov.iov_len = buflen;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_rw = UIO_READ;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_procp = p;
auio.uio_resid = buflen;
auio.uio_offset = off & ~(DIRBLKSIZ-1);
if (error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL, NULL))
goto out;
inp = buf + (off & (DIRBLKSIZ-1));
buflen -= off & (DIRBLKSIZ-1);
outp = args->buf;
resid = args->nbytes;
if ((len = (buflen - auio.uio_resid)) <= 0)
goto eof;
for (; len > 0 && resid > 0; len -= reclen) {
reclen = BSD_DIRENT(inp)->d_reclen;
if (reclen & 3)
panic("ibcs2_getdents");
if (BSD_DIRENT(inp)->d_ino == 0) {
off += reclen;
inp += reclen;
continue;
}
if (IBCS2_RECLEN(inp) > len || resid < IBCS2_RECLEN(inp)) {
outp++;
break;
}
bzero(&dir, sizeof(struct ibcs2_dirent));
dir.d_ino = BSD_DIRENT(inp)->d_ino;
dir.d_off = (ibcs2_off_t)off;
dir.d_reclen = IBCS2_RECLEN(inp);
bcopy(BSD_DIRENT(inp)->d_name, &dir.d_name,
BSD_DIRENT(inp)->d_namlen);
if (error = copyout(&dir, outp, dir.d_reclen))
goto out;
outp += IBCS2_RECLEN(inp);
resid -= IBCS2_RECLEN(inp);
off += reclen;
inp += reclen;
}
if (outp == args->buf)
goto again;
fp->f_offset = off;
eof:
*retval = args->nbytes - resid;
out:
VOP_UNLOCK(vp);
free(buf, M_TEMP);
return error;
}
struct ibcs2_open_args {
char *fname;
int fmode;
int crtmode;
};
int
ibcs2_open(struct proc *p, struct ibcs2_open_args *args, int *retval)
{
int bsd_mode = 0;
int noctty = args->fmode & 0x8000;
int error;
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("IBCS2: 'open' name=%s, flags=%x, mode=%x\n",
args->fname, args->fmode, args->crtmode);
if (args->fmode & IBCS2_RDONLY) bsd_mode |= O_RDONLY;
if (args->fmode & IBCS2_WRONLY) bsd_mode |= O_WRONLY;
if (args->fmode & IBCS2_RDWR) bsd_mode |= O_RDWR;
if (args->fmode & IBCS2_NDELAY) bsd_mode |= O_NONBLOCK;
if (args->fmode & IBCS2_APPEND) bsd_mode |= O_APPEND;
if (args->fmode & IBCS2_SYNC) bsd_mode |= O_FSYNC;
if (args->fmode & IBCS2_NONBLOCK) bsd_mode |= O_NONBLOCK;
if (args->fmode & IBCS2_PRIV) bsd_mode |= O_EXLOCK;
if (args->fmode & IBCS2_CREAT) bsd_mode |= O_CREAT;
if (args->fmode & IBCS2_TRUNC) bsd_mode |= O_TRUNC | O_CREAT;
if (args->fmode & IBCS2_EXCL) bsd_mode |= O_EXCL;
if (args->fmode & IBCS2_NOCTTY) bsd_mode |= O_NOCTTY;
args->fmode = bsd_mode;
error = open(p, args, retval);
if (!error && !noctty && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
struct filedesc *fdp = p->p_fd;
struct file *fp = fdp->fd_ofiles[*retval];
if (fp->f_type == DTYPE_VNODE)
(fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, (caddr_t) 0, p);
}
return error;
}
struct ibcs2_read_args {
int fd;
char *buffer;
unsigned int count;
};
int
ibcs2_read(struct proc *p, struct ibcs2_read_args *args, int *retval)
{
struct ibcs2_dir {
ibcs2_ino_t inode;
char fname[14];
} dirbuf;
struct vnode *vp;
struct file *fp;
struct uio auio;
struct iovec aiov;
caddr_t inp, buf, outp;
off_t off;
int buflen, error, eofflag;
int len, reclen, resid;
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("IBCS2: 'read' fd=%d, count=%d\n",
args->fd, args->count);
if (error = getvnode(p->p_fd, args->fd, &fp))
if (error == EINVAL)
return read(p, args, retval);
else
return error;
if ((fp->f_flag & FREAD) == 0)
return EBADF;
vp = (struct vnode *)fp->f_data;
if (vp->v_type != VDIR) {
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("normal read\n");
return read(p, args, retval);
}
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("read directory\n");
buflen = min(DEFAULT_PAGE_SIZE, max(DIRBLKSIZ, args->count));
buf = malloc(buflen, M_TEMP, M_WAITOK);
VOP_LOCK(vp);
off = fp->f_offset;
again:
aiov.iov_base = buf;
aiov.iov_len = buflen;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_rw = UIO_READ;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_procp = p;
auio.uio_resid = buflen;
auio.uio_offset = off & ~(DIRBLKSIZ-1);
if (error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL, NULL))
goto out;
inp = buf + (off & (DIRBLKSIZ-1));
buflen -= off & (DIRBLKSIZ-1);
outp = args->buffer;
resid = args->count;
if ((len = (buflen - auio.uio_resid)) == 0)
goto eof;
for (; len > 0 && resid > 0; len -= reclen) {
reclen = BSD_DIRENT(inp)->d_reclen;
if (reclen & 3)
panic("ibcs2_read");
if (BSD_DIRENT(inp)->d_ino == 0) {
inp += reclen;
off += reclen;
continue;
}
if (reclen > len || resid < sizeof(struct ibcs2_dir)) {
outp++;
break;
}
/*
* TODO: break up name if > 14 chars
* put 14 chars in each dir entry wtih d_ino = 0xffff
* and set the last dir entry's d_ino = inode
*/
dirbuf.inode = (BSD_DIRENT(inp)->d_ino > 0x0000fffe) ?
0xfffe : BSD_DIRENT(inp)->d_ino;
bcopy(BSD_DIRENT(inp)->d_name, &dirbuf.fname, 14); /* XXX */
if (error = copyout(&dirbuf, outp, sizeof(dirbuf)))
goto out;
off += reclen;
inp += reclen;
outp += sizeof(struct ibcs2_dir);
resid -= sizeof(struct ibcs2_dir);
}
if (outp == args->buffer)
goto again;
fp->f_offset = off;
eof:
*retval = args->count - resid;
out:
VOP_UNLOCK(vp);
free(buf, M_TEMP);
return error;
}
struct ibcs2_seek_args {
int fdes;
ibcs2_off_t off;
int whence;
};
int
ibcs2_seek(struct proc *p, struct ibcs2_seek_args *args, int *retval)
{
struct seek_args {
int fdes;
int pad;
off_t off;
int whence;
} tmp_args;
off_t tmp_retval;
int error;
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("IBCS2: 'seek' fd=%d, offset=%d, how=%d\n",
args->fdes, args->off, args->whence);
tmp_args.fdes = args->fdes;
tmp_args.off = (off_t)args->off;
tmp_args.whence = args->whence;
error = lseek(p, &tmp_args, &tmp_retval);
*retval = (int)tmp_retval;
return error;
}
struct ibcs2_write_args {
int fd;
char *buffer;
unsigned int count;
};
int
ibcs2_write(struct proc *p, struct ibcs2_write_args *args, int *retval)
{
if (ibcs2_trace & IBCS2_TRACE_FILE)
printf("IBCS2: 'write' fd=%d, count=%d\n",
args->fd, args->count);
return write(p, args, retval);
}