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426da3bcfb
freebsd/sys/compat/linux/linux_file.c
Alfred Perlstein 426da3bcfb SMP Lock struct file, filedesc and the global file list. 
Seigo Tanimura (tanimura) posted the initial delta.

I've polished it quite a bit reducing the need for locking and
adapting it for KSE.

Locks:

1 mutex in each filedesc
   protects all the fields.
   protects "struct file" initialization, while a struct file
     is being changed from &badfileops -> &pipeops or something
     the filedesc should be locked.

1 mutex in each struct file
   protects the refcount fields.
   doesn't protect anything else.
   the flags used for garbage collection have been moved to
     f_gcflag which was the FILLER short, this doesn't need
     locking because the garbage collection is a single threaded
     container.
  could likely be made to use a pool mutex.

1 sx lock for the global filelist.

struct file *	fhold(struct file *fp);
        /* increments reference count on a file */

struct file *	fhold_locked(struct file *fp);
        /* like fhold but expects file to locked */

struct file *	ffind_hold(struct thread *, int fd);
        /* finds the struct file in thread, adds one reference and
                returns it unlocked */

struct file *	ffind_lock(struct thread *, int fd);
        /* ffind_hold, but returns file locked */

I still have to smp-safe the fget cruft, I'll get to that asap.
2002-01-13 11:58:06 +00:00

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/*-
* Copyright (c) 1994-1995 Søren Schmidt
* 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. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
#include "opt_compat.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/dirent.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sysproto.h>
#include <sys/tty.h>
#include <sys/vnode.h>
#include <ufs/ufs/extattr.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/ufsmount.h>
#include <machine/../linux/linux.h>
#include <machine/../linux/linux_proto.h>
#include <compat/linux/linux_util.h>
#ifndef __alpha__
int
linux_creat(struct thread *td, struct linux_creat_args *args)
{
struct open_args /* {
char *path;
int flags;
int mode;
} */ bsd_open_args;
caddr_t sg;
sg = stackgap_init();
CHECKALTCREAT(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(creat))
printf(ARGS(creat, "%s, %d"), args->path, args->mode);
#endif
bsd_open_args.path = args->path;
bsd_open_args.mode = args->mode;
bsd_open_args.flags = O_WRONLY | O_CREAT | O_TRUNC;
return open(td, &bsd_open_args);
}
#endif /*!__alpha__*/
int
linux_open(struct thread *td, struct linux_open_args *args)
{
struct open_args /* {
char *path;
int flags;
int mode;
} */ bsd_open_args;
struct proc *p = td->td_proc;
int error;
caddr_t sg;
sg = stackgap_init();
if (args->flags & LINUX_O_CREAT)
CHECKALTCREAT(td, &sg, args->path);
else
CHECKALTEXIST(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(open))
printf(ARGS(open, "%s, 0x%x, 0x%x"),
args->path, args->flags, args->mode);
#endif
bsd_open_args.flags = 0;
if (args->flags & LINUX_O_RDONLY)
bsd_open_args.flags |= O_RDONLY;
if (args->flags & LINUX_O_WRONLY)
bsd_open_args.flags |= O_WRONLY;
if (args->flags & LINUX_O_RDWR)
bsd_open_args.flags |= O_RDWR;
if (args->flags & LINUX_O_NDELAY)
bsd_open_args.flags |= O_NONBLOCK;
if (args->flags & LINUX_O_APPEND)
bsd_open_args.flags |= O_APPEND;
if (args->flags & LINUX_O_SYNC)
bsd_open_args.flags |= O_FSYNC;
if (args->flags & LINUX_O_NONBLOCK)
bsd_open_args.flags |= O_NONBLOCK;
if (args->flags & LINUX_FASYNC)
bsd_open_args.flags |= O_ASYNC;
if (args->flags & LINUX_O_CREAT)
bsd_open_args.flags |= O_CREAT;
if (args->flags & LINUX_O_TRUNC)
bsd_open_args.flags |= O_TRUNC;
if (args->flags & LINUX_O_EXCL)
bsd_open_args.flags |= O_EXCL;
if (args->flags & LINUX_O_NOCTTY)
bsd_open_args.flags |= O_NOCTTY;
bsd_open_args.path = args->path;
bsd_open_args.mode = args->mode;
error = open(td, &bsd_open_args);
PROC_LOCK(p);
if (!error && !(bsd_open_args.flags & O_NOCTTY) &&
SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
struct file *fp;
fp = ffind_hold(td, td->td_retval[0]);
PROC_UNLOCK(p);
if (fp->f_type == DTYPE_VNODE)
fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, td);
fdrop(fp, td);
} else
PROC_UNLOCK(p);
#ifdef DEBUG
if (ldebug(open))
printf(LMSG("open returns error %d"), error);
#endif
return error;
}
int
linux_lseek(struct thread *td, struct linux_lseek_args *args)
{
struct lseek_args /* {
int fd;
int pad;
off_t offset;
int whence;
} */ tmp_args;
int error;
#ifdef DEBUG
if (ldebug(lseek))
printf(ARGS(lseek, "%d, %ld, %d"),
args->fdes, (long)args->off, args->whence);
#endif
tmp_args.fd = args->fdes;
tmp_args.offset = (off_t)args->off;
tmp_args.whence = args->whence;
error = lseek(td, &tmp_args);
return error;
}
#ifndef __alpha__
int
linux_llseek(struct thread *td, struct linux_llseek_args *args)
{
struct lseek_args bsd_args;
int error;
off_t off;
#ifdef DEBUG
if (ldebug(llseek))
printf(ARGS(llseek, "%d, %d:%d, %d"),
args->fd, args->ohigh, args->olow, args->whence);
#endif
off = (args->olow) | (((off_t) args->ohigh) << 32);
bsd_args.fd = args->fd;
bsd_args.offset = off;
bsd_args.whence = args->whence;
if ((error = lseek(td, &bsd_args)))
return error;
if ((error = copyout(td->td_retval, (caddr_t)args->res, sizeof (off_t))))
return error;
td->td_retval[0] = 0;
return 0;
}
#endif /*!__alpha__*/
#ifndef __alpha__
int
linux_readdir(struct thread *td, struct linux_readdir_args *args)
{
struct linux_getdents_args lda;
lda.fd = args->fd;
lda.dent = args->dent;
lda.count = 1;
return linux_getdents(td, &lda);
}
#endif /*!__alpha__*/
/*
* Note that linux_getdents(2) and linux_getdents64(2) have the same
* arguments. They only differ in the definition of struct dirent they
* operate on. We use this to common the code, with the exception of
* accessing struct dirent. Note that linux_readdir(2) is implemented
* by means of linux_getdents(2). In this case we never operate on
* struct dirent64 and thus don't need to handle it...
*/
struct l_dirent {
l_long d_ino;
l_off_t d_off;
l_ushort d_reclen;
char d_name[LINUX_NAME_MAX + 1];
};
struct l_dirent64 {
uint64_t d_ino;
int64_t d_off;
l_ushort d_reclen;
u_char d_type;
char d_name[LINUX_NAME_MAX + 1];
};
#define LINUX_RECLEN(de,namlen) \
ALIGN((((char *)&(de)->d_name - (char *)de) + (namlen) + 1))
#define LINUX_DIRBLKSIZ 512
static int
getdents_common(struct thread *td, struct linux_getdents64_args *args,
int is64bit)
{
register struct dirent *bdp;
struct vnode *vp;
caddr_t inp, buf; /* BSD-format */
int len, reclen; /* BSD-format */
caddr_t outp; /* Linux-format */
int resid, linuxreclen=0; /* Linux-format */
struct file *fp;
struct uio auio;
struct iovec aiov;
struct vattr va;
off_t off;
struct l_dirent linux_dirent;
struct l_dirent64 linux_dirent64;
int buflen, error, eofflag, nbytes, justone;
u_long *cookies = NULL, *cookiep;
int ncookies;
if ((error = getvnode(td->td_proc->p_fd, args->fd, &fp)) != 0)
return (error);
if ((fp->f_flag & FREAD) == 0) {
fdrop(fp, td);
return (EBADF);
}
vp = (struct vnode *) fp->f_data;
if (vp->v_type != VDIR) {
fdrop(fp, td);
return (EINVAL);
}
if ((error = VOP_GETATTR(vp, &va, td->td_proc->p_ucred, td))) {
fdrop(fp, td);
return (error);
}
nbytes = args->count;
if (nbytes == 1) {
/* readdir(2) case. Always struct dirent. */
if (is64bit) {
fdrop(fp, td);
return (EINVAL);
}
nbytes = sizeof(linux_dirent);
justone = 1;
} else
justone = 0;
off = fp->f_offset;
buflen = max(LINUX_DIRBLKSIZ, nbytes);
buflen = min(buflen, MAXBSIZE);
buf = malloc(buflen, M_TEMP, M_WAITOK);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
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_td = td;
auio.uio_resid = buflen;
auio.uio_offset = off;
if (cookies) {
free(cookies, M_TEMP);
cookies = NULL;
}
if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies,
&cookies)))
goto out;
inp = buf;
outp = (caddr_t)args->dirent;
resid = nbytes;
if ((len = buflen - auio.uio_resid) <= 0)
goto eof;
cookiep = cookies;
if (cookies) {
/*
* When using cookies, the vfs has the option of reading from
* a different offset than that supplied (UFS truncates the
* offset to a block boundary to make sure that it never reads
* partway through a directory entry, even if the directory
* has been compacted).
*/
while (len > 0 && ncookies > 0 && *cookiep <= off) {
bdp = (struct dirent *) inp;
len -= bdp->d_reclen;
inp += bdp->d_reclen;
cookiep++;
ncookies--;
}
}
while (len > 0) {
if (cookiep && ncookies == 0)
break;
bdp = (struct dirent *) inp;
reclen = bdp->d_reclen;
if (reclen & 3) {
error = EFAULT;
goto out;
}
if (bdp->d_fileno == 0) {
inp += reclen;
if (cookiep) {
off = *cookiep++;
ncookies--;
} else
off += reclen;
len -= reclen;
continue;
}
linuxreclen = (is64bit)
? LINUX_RECLEN(&linux_dirent64, bdp->d_namlen)
: LINUX_RECLEN(&linux_dirent, bdp->d_namlen);
if (reclen > len || resid < linuxreclen) {
outp++;
break;
}
if (justone) {
/* readdir(2) case. */
linux_dirent.d_ino = (l_long)bdp->d_fileno;
linux_dirent.d_off = (l_off_t)linuxreclen;
linux_dirent.d_reclen = (l_ushort)bdp->d_namlen;
strcpy(linux_dirent.d_name, bdp->d_name);
error = copyout(&linux_dirent, outp, linuxreclen);
} else {
if (is64bit) {
linux_dirent64.d_ino = bdp->d_fileno;
linux_dirent64.d_off = (cookiep)
? (l_off_t)*cookiep
: (l_off_t)(off + reclen);
linux_dirent64.d_reclen =
(l_ushort)linuxreclen;
linux_dirent64.d_type = bdp->d_type;
strcpy(linux_dirent64.d_name, bdp->d_name);
error = copyout(&linux_dirent64, outp,
linuxreclen);
} else {
linux_dirent.d_ino = bdp->d_fileno;
linux_dirent.d_off = (cookiep)
? (l_off_t)*cookiep
: (l_off_t)(off + reclen);
linux_dirent.d_reclen = (l_ushort)linuxreclen;
strcpy(linux_dirent.d_name, bdp->d_name);
error = copyout(&linux_dirent, outp,
linuxreclen);
}
}
if (error)
goto out;
inp += reclen;
if (cookiep) {
off = *cookiep++;
ncookies--;
} else
off += reclen;
outp += linuxreclen;
resid -= linuxreclen;
len -= reclen;
if (justone)
break;
}
if (outp == (caddr_t)args->dirent)
goto again;
fp->f_offset = off;
if (justone)
nbytes = resid + linuxreclen;
eof:
td->td_retval[0] = nbytes - resid;
out:
if (cookies)
free(cookies, M_TEMP);
VOP_UNLOCK(vp, 0, td);
fdrop(fp, td);
free(buf, M_TEMP);
return (error);
}
int
linux_getdents(struct thread *td, struct linux_getdents_args *args)
{
#ifdef DEBUG
if (ldebug(getdents))
printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count);
#endif
return (getdents_common(td, (struct linux_getdents64_args*)args, 0));
}
int
linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
{
#ifdef DEBUG
if (ldebug(getdents64))
printf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count);
#endif
return (getdents_common(td, args, 1));
}
/*
* These exist mainly for hooks for doing /compat/linux translation.
*/
int
linux_access(struct thread *td, struct linux_access_args *args)
{
struct access_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(access))
printf(ARGS(access, "%s, %d"), args->path, args->flags);
#endif
bsd.path = args->path;
bsd.flags = args->flags;
return access(td, &bsd);
}
int
linux_unlink(struct thread *td, struct linux_unlink_args *args)
{
struct unlink_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(unlink))
printf(ARGS(unlink, "%s"), args->path);
#endif
bsd.path = args->path;
return unlink(td, &bsd);
}
int
linux_chdir(struct thread *td, struct linux_chdir_args *args)
{
struct chdir_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(chdir))
printf(ARGS(chdir, "%s"), args->path);
#endif
bsd.path = args->path;
return chdir(td, &bsd);
}
int
linux_chmod(struct thread *td, struct linux_chmod_args *args)
{
struct chmod_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(chmod))
printf(ARGS(chmod, "%s, %d"), args->path, args->mode);
#endif
bsd.path = args->path;
bsd.mode = args->mode;
return chmod(td, &bsd);
}
int
linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
{
struct mkdir_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTCREAT(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(mkdir))
printf(ARGS(mkdir, "%s, %d"), args->path, args->mode);
#endif
bsd.path = args->path;
bsd.mode = args->mode;
return mkdir(td, &bsd);
}
int
linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
{
struct rmdir_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(rmdir))
printf(ARGS(rmdir, "%s"), args->path);
#endif
bsd.path = args->path;
return rmdir(td, &bsd);
}
int
linux_rename(struct thread *td, struct linux_rename_args *args)
{
struct rename_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->from);
CHECKALTCREAT(td, &sg, args->to);
#ifdef DEBUG
if (ldebug(rename))
printf(ARGS(rename, "%s, %s"), args->from, args->to);
#endif
bsd.from = args->from;
bsd.to = args->to;
return rename(td, &bsd);
}
int
linux_symlink(struct thread *td, struct linux_symlink_args *args)
{
struct symlink_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
CHECKALTCREAT(td, &sg, args->to);
#ifdef DEBUG
if (ldebug(symlink))
printf(ARGS(symlink, "%s, %s"), args->path, args->to);
#endif
bsd.path = args->path;
bsd.link = args->to;
return symlink(td, &bsd);
}
int
linux_readlink(struct thread *td, struct linux_readlink_args *args)
{
struct readlink_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->name);
#ifdef DEBUG
if (ldebug(readlink))
printf(ARGS(readlink, "%s, %p, %d"),
args->name, (void *)args->buf, args->count);
#endif
bsd.path = args->name;
bsd.buf = args->buf;
bsd.count = args->count;
return readlink(td, &bsd);
}
int
linux_truncate(struct thread *td, struct linux_truncate_args *args)
{
struct truncate_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(truncate))
printf(ARGS(truncate, "%s, %ld"), args->path,
(long)args->length);
#endif
bsd.path = args->path;
bsd.length = args->length;
return truncate(td, &bsd);
}
int
linux_link(struct thread *td, struct linux_link_args *args)
{
struct link_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
CHECKALTCREAT(td, &sg, args->to);
#ifdef DEBUG
if (ldebug(link))
printf(ARGS(link, "%s, %s"), args->path, args->to);
#endif
bsd.path = args->path;
bsd.link = args->to;
return link(td, &bsd);
}
#ifndef __alpha__
int
linux_fdatasync(td, uap)
struct thread *td;
struct linux_fdatasync_args *uap;
{
struct fsync_args bsd;
bsd.fd = uap->fd;
return fsync(td, &bsd);
}
#endif /*!__alpha__*/
int
linux_pread(td, uap)
struct thread *td;
struct linux_pread_args *uap;
{
struct pread_args bsd;
bsd.fd = uap->fd;
bsd.buf = uap->buf;
bsd.nbyte = uap->nbyte;
bsd.offset = uap->offset;
return pread(td, &bsd);
}
int
linux_pwrite(td, uap)
struct thread *td;
struct linux_pwrite_args *uap;
{
struct pwrite_args bsd;
bsd.fd = uap->fd;
bsd.buf = uap->buf;
bsd.nbyte = uap->nbyte;
bsd.offset = uap->offset;
return pwrite(td, &bsd);
}
int
linux_mount(struct thread *td, struct linux_mount_args *args)
{
struct ufs_args ufs;
char fstypename[MFSNAMELEN];
char mntonname[MNAMELEN], mntfromname[MNAMELEN];
int error;
int fsflags;
const char *fstype;
void *fsdata;
error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1,
NULL);
if (error)
return (error);
error = copyinstr(args->specialfile, mntfromname, MFSNAMELEN - 1, NULL);
if (error)
return (error);
error = copyinstr(args->dir, mntonname, MFSNAMELEN - 1, NULL);
if (error)
return (error);
#ifdef DEBUG
if (ldebug(mount))
printf(ARGS(mount, "%s, %s, %s"),
fstypename, mntfromname, mntonname);
#endif
if (strcmp(fstypename, "ext2") == 0) {
fstype = "ext2fs";
fsdata = &ufs;
ufs.fspec = mntfromname;
#define DEFAULT_ROOTID -2
ufs.export.ex_root = DEFAULT_ROOTID;
ufs.export.ex_flags =
args->rwflag & LINUX_MS_RDONLY ? MNT_EXRDONLY : 0;
} else if (strcmp(fstypename, "proc") == 0) {
fstype = "linprocfs";
fsdata = NULL;
} else {
return (ENODEV);
}
fsflags = 0;
if ((args->rwflag & 0xffff0000) == 0xc0ed0000) {
/*
* Linux SYNC flag is not included; the closest equivalent
* FreeBSD has is !ASYNC, which is our default.
*/
if (args->rwflag & LINUX_MS_RDONLY)
fsflags |= MNT_RDONLY;
if (args->rwflag & LINUX_MS_NOSUID)
fsflags |= MNT_NOSUID;
if (args->rwflag & LINUX_MS_NODEV)
fsflags |= MNT_NODEV;
if (args->rwflag & LINUX_MS_NOEXEC)
fsflags |= MNT_NOEXEC;
if (args->rwflag & LINUX_MS_REMOUNT)
fsflags |= MNT_UPDATE;
}
return (vfs_mount(td, fstype, mntonname, fsflags, fsdata));
}
int
linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
{
struct linux_umount_args args2;
args2.path = args->path;
args2.flags = 0;
return (linux_umount(td, &args2));
}
int
linux_umount(struct thread *td, struct linux_umount_args *args)
{
struct unmount_args bsd;
bsd.path = args->path;
bsd.flags = args->flags; /* XXX correct? */
return (unmount(td, &bsd));
}
/*
* fcntl family of syscalls
*/
struct l_flock {
l_short l_type;
l_short l_whence;
l_off_t l_start;
l_off_t l_len;
l_pid_t l_pid;
};
static void
linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
{
switch (linux_flock->l_type) {
case LINUX_F_RDLCK:
bsd_flock->l_type = F_RDLCK;
break;
case LINUX_F_WRLCK:
bsd_flock->l_type = F_WRLCK;
break;
case LINUX_F_UNLCK:
bsd_flock->l_type = F_UNLCK;
break;
default:
bsd_flock->l_type = -1;
break;
}
bsd_flock->l_whence = linux_flock->l_whence;
bsd_flock->l_start = (off_t)linux_flock->l_start;
bsd_flock->l_len = (off_t)linux_flock->l_len;
bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
}
static void
bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
{
switch (bsd_flock->l_type) {
case F_RDLCK:
linux_flock->l_type = LINUX_F_RDLCK;
break;
case F_WRLCK:
linux_flock->l_type = LINUX_F_WRLCK;
break;
case F_UNLCK:
linux_flock->l_type = LINUX_F_UNLCK;
break;
}
linux_flock->l_whence = bsd_flock->l_whence;
linux_flock->l_start = (l_off_t)bsd_flock->l_start;
linux_flock->l_len = (l_off_t)bsd_flock->l_len;
linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
}
#if defined(__i386__)
struct l_flock64 {
l_short l_type;
l_short l_whence;
l_loff_t l_start;
l_loff_t l_len;
l_pid_t l_pid;
};
static void
linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
{
switch (linux_flock->l_type) {
case LINUX_F_RDLCK:
bsd_flock->l_type = F_RDLCK;
break;
case LINUX_F_WRLCK:
bsd_flock->l_type = F_WRLCK;
break;
case LINUX_F_UNLCK:
bsd_flock->l_type = F_UNLCK;
break;
default:
bsd_flock->l_type = -1;
break;
}
bsd_flock->l_whence = linux_flock->l_whence;
bsd_flock->l_start = (off_t)linux_flock->l_start;
bsd_flock->l_len = (off_t)linux_flock->l_len;
bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
}
static void
bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
{
switch (bsd_flock->l_type) {
case F_RDLCK:
linux_flock->l_type = LINUX_F_RDLCK;
break;
case F_WRLCK:
linux_flock->l_type = LINUX_F_WRLCK;
break;
case F_UNLCK:
linux_flock->l_type = LINUX_F_UNLCK;
break;
}
linux_flock->l_whence = bsd_flock->l_whence;
linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
}
#endif /* __i386__ */
#if defined(__alpha__)
#define linux_fcntl64_args linux_fcntl_args
#endif
static int
fcntl_common(struct thread *td, struct linux_fcntl64_args *args)
{
struct fcntl_args fcntl_args;
struct filedesc *fdp;
struct file *fp;
int error, result;
fcntl_args.fd = args->fd;
switch (args->cmd) {
case LINUX_F_DUPFD:
fcntl_args.cmd = F_DUPFD;
fcntl_args.arg = args->arg;
return (fcntl(td, &fcntl_args));
case LINUX_F_GETFD:
fcntl_args.cmd = F_GETFD;
return (fcntl(td, &fcntl_args));
case LINUX_F_SETFD:
fcntl_args.cmd = F_SETFD;
fcntl_args.arg = args->arg;
return (fcntl(td, &fcntl_args));
case LINUX_F_GETFL:
fcntl_args.cmd = F_GETFL;
error = fcntl(td, &fcntl_args);
result = td->td_retval[0];
td->td_retval[0] = 0;
if (result & O_RDONLY)
td->td_retval[0] |= LINUX_O_RDONLY;
if (result & O_WRONLY)
td->td_retval[0] |= LINUX_O_WRONLY;
if (result & O_RDWR)
td->td_retval[0] |= LINUX_O_RDWR;
if (result & O_NDELAY)
td->td_retval[0] |= LINUX_O_NONBLOCK;
if (result & O_APPEND)
td->td_retval[0] |= LINUX_O_APPEND;
if (result & O_FSYNC)
td->td_retval[0] |= LINUX_O_SYNC;
if (result & O_ASYNC)
td->td_retval[0] |= LINUX_FASYNC;
return (error);
case LINUX_F_SETFL:
fcntl_args.arg = 0;
if (args->arg & LINUX_O_NDELAY)
fcntl_args.arg |= O_NONBLOCK;
if (args->arg & LINUX_O_APPEND)
fcntl_args.arg |= O_APPEND;
if (args->arg & LINUX_O_SYNC)
fcntl_args.arg |= O_FSYNC;
if (args->arg & LINUX_FASYNC)
fcntl_args.arg |= O_ASYNC;
fcntl_args.cmd = F_SETFL;
return (fcntl(td, &fcntl_args));
case LINUX_F_GETOWN:
fcntl_args.cmd = F_GETOWN;
return (fcntl(td, &fcntl_args));
case LINUX_F_SETOWN:
/*
* XXX some Linux applications depend on F_SETOWN having no
* significant effect for pipes (SIGIO is not delivered for
* pipes under Linux-2.2.35 at least).
*/
fp = ffind_hold(td, args->fd);
if (fp == NULL)
return EBADF;
if (fp->f_type == DTYPE_PIPE) {
fdrop(fp, td);
return (EINVAL);
}
fdrop(fp, td);
fcntl_args.cmd = F_SETOWN;
fcntl_args.arg = args->arg;
return (fcntl(td, &fcntl_args));
}
return (EINVAL);
}
int
linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
{
struct linux_fcntl64_args args64;
struct fcntl_args fcntl_args;
struct l_flock linux_flock;
struct flock *bsd_flock;
int error;
caddr_t sg;
sg = stackgap_init();
bsd_flock = (struct flock *)stackgap_alloc(&sg, sizeof(bsd_flock));
#ifdef DEBUG
if (ldebug(fcntl))
printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd);
#endif
switch (args->cmd) {
case LINUX_F_GETLK:
error = copyin((caddr_t)args->arg, &linux_flock,
sizeof(linux_flock));
if (error)
return (error);
linux_to_bsd_flock(&linux_flock, bsd_flock);
fcntl_args.fd = args->fd;
fcntl_args.cmd = F_GETLK;
fcntl_args.arg = (long)bsd_flock;
error = fcntl(td, &fcntl_args);
if (error)
return (error);
bsd_to_linux_flock(bsd_flock, &linux_flock);
return (copyout(&linux_flock, (caddr_t)args->arg,
sizeof(linux_flock)));
case LINUX_F_SETLK:
error = copyin((caddr_t)args->arg, &linux_flock,
sizeof(linux_flock));
if (error)
return (error);
linux_to_bsd_flock(&linux_flock, bsd_flock);
fcntl_args.fd = args->fd;
fcntl_args.cmd = F_SETLK;
fcntl_args.arg = (long)bsd_flock;
return (fcntl(td, &fcntl_args));
case LINUX_F_SETLKW:
error = copyin((caddr_t)args->arg, &linux_flock,
sizeof(linux_flock));
if (error)
return (error);
linux_to_bsd_flock(&linux_flock, bsd_flock);
fcntl_args.fd = args->fd;
fcntl_args.cmd = F_SETLKW;
fcntl_args.arg = (long)bsd_flock;
return (fcntl(td, &fcntl_args));
}
args64.fd = args->fd;
args64.cmd = args->cmd;
args64.arg = args->arg;
return (fcntl_common(td, &args64));
}
#if defined(__i386__)
int
linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
{
struct fcntl_args fcntl_args;
struct l_flock64 linux_flock;
struct flock *bsd_flock;
int error;
caddr_t sg;
sg = stackgap_init();
bsd_flock = (struct flock *)stackgap_alloc(&sg, sizeof(bsd_flock));
#ifdef DEBUG
if (ldebug(fcntl64))
printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd);
#endif
switch (args->cmd) {
case LINUX_F_GETLK:
error = copyin((caddr_t)args->arg, &linux_flock,
sizeof(linux_flock));
if (error)
return (error);
linux_to_bsd_flock64(&linux_flock, bsd_flock);
fcntl_args.fd = args->fd;
fcntl_args.cmd = F_GETLK;
fcntl_args.arg = (long)bsd_flock;
error = fcntl(td, &fcntl_args);
if (error)
return (error);
bsd_to_linux_flock64(bsd_flock, &linux_flock);
return (copyout(&linux_flock, (caddr_t)args->arg,
sizeof(linux_flock)));
case LINUX_F_SETLK:
error = copyin((caddr_t)args->arg, &linux_flock,
sizeof(linux_flock));
if (error)
return (error);
linux_to_bsd_flock64(&linux_flock, bsd_flock);
fcntl_args.fd = args->fd;
fcntl_args.cmd = F_SETLK;
fcntl_args.arg = (long)bsd_flock;
return (fcntl(td, &fcntl_args));
case LINUX_F_SETLKW:
error = copyin((caddr_t)args->arg, &linux_flock,
sizeof(linux_flock));
if (error)
return (error);
linux_to_bsd_flock64(&linux_flock, bsd_flock);
fcntl_args.fd = args->fd;
fcntl_args.cmd = F_SETLKW;
fcntl_args.arg = (long)bsd_flock;
return (fcntl(td, &fcntl_args));
}
return (fcntl_common(td, args));
}
#endif /* __i386__ */
int
linux_chown(struct thread *td, struct linux_chown_args *args)
{
struct chown_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(chown))
printf(ARGS(chown, "%s, %d, %d"), args->path, args->uid,
args->gid);
#endif
bsd.path = args->path;
bsd.uid = args->uid;
bsd.gid = args->gid;
return (chown(td, &bsd));
}
int
linux_lchown(struct thread *td, struct linux_lchown_args *args)
{
struct lchown_args bsd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(td, &sg, args->path);
#ifdef DEBUG
if (ldebug(lchown))
printf(ARGS(lchown, "%s, %d, %d"), args->path, args->uid,
args->gid);
#endif
bsd.path = args->path;
bsd.uid = args->uid;
bsd.gid = args->gid;
return (lchown(td, &bsd));
}
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