/* $OpenBSD: linux_file64.c,v 1.3 2002/03/14 01:26:50 millert Exp $ */ /* $NetBSD: linux_file64.c,v 1.2 2000/12/12 22:24:56 jdolecek Exp $ */ /*- * Copyright (c) 1995, 1998, 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Frank van der Linden and Eric Haszlakiewicz. * * 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. * 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 NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * Linux 64bit filesystem calls. Used on 32bit archs, not used on 64bit ones. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include void bsd_to_linux_flock64(struct flock *, struct linux_flock64 *); void linux_to_bsd_flock64(struct linux_flock64 *, struct flock *); static void bsd_to_linux_stat(struct stat *, struct linux_stat64 *); static int linux_do_stat64(struct proc *, void *, register_t *, int); /* * Convert a OpenBSD stat structure to a Linux stat structure. * Only the order of the fields and the padding in the structure * is different. linux_fakedev is a machine-dependent function * which optionally converts device driver major/minor numbers * (XXX horrible, but what can you do against code that compares * things against constant major device numbers? sigh) */ static void bsd_to_linux_stat(bsp, lsp) struct stat *bsp; struct linux_stat64 *lsp; { lsp->lst_dev = bsp->st_dev; lsp->lst_ino = bsp->st_ino; lsp->lst_mode = (linux_mode_t)bsp->st_mode; if (bsp->st_nlink >= (1 << 15)) lsp->lst_nlink = (1 << 15) - 1; else lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; lsp->lst_uid = bsp->st_uid; lsp->lst_gid = bsp->st_gid; lsp->lst_rdev = linux_fakedev(bsp->st_rdev); lsp->lst_size = bsp->st_size; lsp->lst_blksize = bsp->st_blksize; lsp->lst_blocks = bsp->st_blocks; lsp->lst_atime = bsp->st_atime; lsp->lst_mtime = bsp->st_mtime; lsp->lst_ctime = bsp->st_ctime; } /* * The stat functions below are plain sailing. stat and lstat are handled * by one function to avoid code duplication. */ int linux_sys_fstat64(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_fstat64_args /* { syscallarg(int) fd; syscallarg(linux_stat64 *) sp; } */ *uap = v; struct sys_fstat_args fsa; struct linux_stat64 tmplst; struct stat *st,tmpst; caddr_t sg; int error; sg = stackgap_init(p->p_emul); st = stackgap_alloc(&sg, sizeof (struct stat)); SCARG(&fsa, fd) = SCARG(uap, fd); SCARG(&fsa, sb) = st; if ((error = sys_fstat(p, &fsa, retval))) return error; if ((error = copyin(st, &tmpst, sizeof tmpst))) return error; bsd_to_linux_stat(&tmpst, &tmplst); if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) return error; return 0; } static int linux_do_stat64(p, v, retval, dolstat) struct proc *p; void *v; register_t *retval; int dolstat; { struct sys_stat_args sa; struct linux_stat64 tmplst; struct stat *st, tmpst; caddr_t sg; int error; struct linux_sys_stat64_args *uap = v; sg = stackgap_init(p->p_emul); st = stackgap_alloc(&sg, sizeof (struct stat)); LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); SCARG(&sa, ub) = st; SCARG(&sa, path) = SCARG(uap, path); if ((error = (dolstat ? sys_lstat(p, &sa, retval) : sys_stat(p, &sa, retval)))) return error; if ((error = copyin(st, &tmpst, sizeof tmpst))) return error; bsd_to_linux_stat(&tmpst, &tmplst); if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) return error; return 0; } int linux_sys_stat64(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_stat64_args /* { syscallarg(const char *) path; syscallarg(struct linux_stat64 *) sp; } */ *uap = v; return linux_do_stat64(p, uap, retval, 0); } int linux_sys_lstat64(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_lstat64_args /* { syscallarg(char *) path; syscallarg(struct linux_stat64 *) sp; } */ *uap = v; return linux_do_stat64(p, uap, retval, 1); } int linux_sys_truncate64(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_truncate64_args /* { syscallarg(char *) path; syscallarg(off_t) length; } */ *uap = v; caddr_t sg = stackgap_init(p->p_emul); LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); return sys_truncate(p, uap, retval); } /* * The next two functions take care of converting the flock * structure back and forth between Linux and OpenBSD format. * The only difference in the structures is the order of * the fields, and the 'whence' value. */ void bsd_to_linux_flock64(struct flock *bfp, struct linux_flock64 *lfp) { lfp->l_start = bfp->l_start; lfp->l_len = bfp->l_len; lfp->l_pid = bfp->l_pid; lfp->l_whence = bfp->l_whence; switch (bfp->l_type) { case F_RDLCK: lfp->l_type = LINUX_F_RDLCK; break; case F_UNLCK: lfp->l_type = LINUX_F_UNLCK; break; case F_WRLCK: lfp->l_type = LINUX_F_WRLCK; break; } } void linux_to_bsd_flock64(struct linux_flock64 *lfp, struct flock *bfp) { bfp->l_start = lfp->l_start; bfp->l_len = lfp->l_len; bfp->l_pid = lfp->l_pid; bfp->l_whence = lfp->l_whence; switch (lfp->l_type) { case LINUX_F_RDLCK: bfp->l_type = F_RDLCK; break; case LINUX_F_UNLCK: bfp->l_type = F_UNLCK; break; case LINUX_F_WRLCK: bfp->l_type = F_WRLCK; break; } } int linux_sys_fcntl64(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_fcntl64_args /* { syscallarg(u_int) fd; syscallarg(u_int) cmd; syscallarg(void *) arg; } */ *uap = v; int fd, cmd, error; caddr_t arg, sg; struct linux_flock64 lfl; struct flock *bfp, bfl; struct sys_fcntl_args fca; fd = SCARG(uap, fd); cmd = SCARG(uap, cmd); arg = (caddr_t) SCARG(uap, arg); switch (cmd) { case LINUX_F_GETLK64: sg = stackgap_init(p->p_emul); if ((error = copyin(arg, &lfl, sizeof lfl))) return error; linux_to_bsd_flock64(&lfl, &bfl); bfp = (struct flock *) stackgap_alloc(&sg, sizeof *bfp); SCARG(&fca, fd) = fd; SCARG(&fca, cmd) = F_GETLK; SCARG(&fca, arg) = bfp; if ((error = copyout(&bfl, bfp, sizeof bfl))) return error; if ((error = sys_fcntl(p, &fca, retval))) return error; if ((error = copyin(bfp, &bfl, sizeof bfl))) return error; bsd_to_linux_flock64(&bfl, &lfl); error = copyout(&lfl, arg, sizeof lfl); return (error); case LINUX_F_SETLK64: case LINUX_F_SETLKW64: cmd = (cmd == LINUX_F_SETLK64 ? F_SETLK : F_SETLKW); if ((error = copyin(arg, &lfl, sizeof lfl))) return error; linux_to_bsd_flock64(&lfl, &bfl); sg = stackgap_init(p->p_emul); bfp = (struct flock *) stackgap_alloc(&sg, sizeof *bfp); if ((error = copyout(&bfl, bfp, sizeof bfl))) return error; SCARG(&fca, fd) = fd; SCARG(&fca, cmd) = cmd; SCARG(&fca, arg) = bfp; return (sys_fcntl(p, &fca, retval)); default: return (linux_sys_fcntl(p, v, retval)); } /* NOTREACHED */ }