Kernel portion of the fsync_range(2) system call. Written by Bill
Studenmund, and contributed by Wasabi Systems, Inc.
This commit is contained in:
thorpej
parent
bafaeff914
commit
857f24339f
@ -1,4 +1,4 @@
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$NetBSD: syscalls.master,v 1.133 2003/09/30 20:36:10 christos Exp $
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$NetBSD: syscalls.master,v 1.134 2003/11/15 01:19:38 thorpej Exp $
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; @(#)syscalls.master 8.2 (Berkeley) 1/13/94
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@ -705,3 +705,6 @@
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351 UNIMPL sys_sched_get_priority_max
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352 UNIMPL sys_sched_get_priority_min
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353 UNIMPL sys_sched_rr_get_interval
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354 STD { int sys_fsync_range(int fd, int flags, off_t start, \
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off_t length); }
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@ -1,4 +1,4 @@
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/* $NetBSD: vfs_syscalls.c,v 1.200 2003/11/09 07:55:38 yamt Exp $ */
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/* $NetBSD: vfs_syscalls.c,v 1.201 2003/11/15 01:19:38 thorpej Exp $ */
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/*
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* Copyright (c) 1989, 1993
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@ -37,7 +37,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.200 2003/11/09 07:55:38 yamt Exp $");
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__KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.201 2003/11/15 01:19:38 thorpej Exp $");
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#include "opt_compat_netbsd.h"
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#include "opt_compat_43.h"
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@ -3005,6 +3005,80 @@ sys_fsync(l, v, retval)
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return (error);
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}
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/*
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* Sync a range of file data. API modeled after that found in AIX.
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*
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* FDATASYNC indicates that we need only save enough metadata to be able
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* to re-read the written data. Note we duplicate AIX's requirement that
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* the file be open for writing.
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*/
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/* ARGSUSED */
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int
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sys_fsync_range(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct sys_fsync_range_args /* {
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syscallarg(int) fd;
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syscallarg(int) flags;
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syscallarg(off_t) start;
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syscallarg(int) length;
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} */ *uap = v;
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struct proc *p = l->l_proc;
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struct vnode *vp;
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struct file *fp;
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int flags, nflags;
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off_t s, e, len;
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int error;
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/* getvnode() will use the descriptor for us */
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if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
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return (error);
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if ((fp->f_flag & FWRITE) == 0) {
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FILE_UNUSE(fp, p);
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return (EBADF);
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}
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flags = SCARG(uap, flags);
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if (((flags & (FDATASYNC | FFILESYNC)) == 0) ||
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((~flags & (FDATASYNC | FFILESYNC)) == 0)) {
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return (EINVAL);
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}
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/* Now set up the flags for value(s) to pass to VOP_FSYNC() */
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if (flags & FDATASYNC)
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nflags = FSYNC_DATAONLY | FSYNC_WAIT;
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else
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nflags = FSYNC_WAIT;
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len = SCARG(uap, length);
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/* If length == 0, we do the whole file, and s = l = 0 will do that */
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if (len) {
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s = SCARG(uap, start);
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e = s + len;
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if (e < s) {
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FILE_UNUSE(fp, p);
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return (EINVAL);
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}
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} else {
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e = 0;
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s = 0;
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}
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vp = (struct vnode *)fp->f_data;
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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error = VOP_FSYNC(vp, fp->f_cred, nflags, s, e, p);
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if (error == 0 && bioops.io_fsync != NULL &&
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vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP))
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(*bioops.io_fsync)(vp);
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VOP_UNLOCK(vp, 0);
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FILE_UNUSE(fp, p);
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return (error);
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}
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/*
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* Sync the data of an open file.
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*/
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@ -1,4 +1,4 @@
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/* $NetBSD: unistd.h,v 1.29 2003/08/07 16:34:21 agc Exp $ */
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/* $NetBSD: unistd.h,v 1.30 2003/11/15 01:19:38 thorpej Exp $ */
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/*
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* Copyright (c) 1989, 1993
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@ -112,6 +112,17 @@
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#define L_SET SEEK_SET
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#define L_INCR SEEK_CUR
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#define L_XTND SEEK_END
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/*
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* fsync_range values.
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*
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* Note the following flag values were chosen to not overlap
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* values for SEEK_XXX flags. While not currently implemented,
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* it is possible to extend this call to respect SEEK_CUR and
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* SEEK_END offset addressing modes.
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*/
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#define FDATASYNC 0x0010 /* sync data and minimal metadata */
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#define FFILESYNC 0x0020 /* sync data and metadata */
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#endif
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/* configurable pathname variables */
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@ -1,4 +1,4 @@
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/* $NetBSD: ffs_vnops.c,v 1.65 2003/11/08 07:13:57 jdolecek Exp $ */
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/* $NetBSD: ffs_vnops.c,v 1.66 2003/11/15 01:19:38 thorpej Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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@ -32,7 +32,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.65 2003/11/08 07:13:57 jdolecek Exp $");
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__KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.66 2003/11/15 01:19:38 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -318,7 +318,8 @@ ffs_fsync(v)
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splx(s);
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return (VOP_UPDATE(vp, NULL, NULL,
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(ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0));
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((ap->a_flags & (FSYNC_WAIT | FSYNC_DATAONLY)) == FSYNC_WAIT)
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? UPDATE_WAIT : 0));
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}
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/*
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