2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
130 lines
3.9 KiB
Groff
130 lines
3.9 KiB
Groff
.\" $NetBSD: lfs_markv.2,v 1.11 2008/04/30 13:10:51 martin Exp $
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.\"
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.\" Copyright (c) 2000 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Konrad Schroder.
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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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.\" 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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd May 23, 2000
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.Dt LFS_MARKV 2
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.Os
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.Sh NAME
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.Nm lfs_markv
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.Nd rewrite disk blocks to new disk locations
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/types.h
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.In ufs/lfs/lfs.h
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.Ft int
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.Fn lfs_markv "fsid_t *fsidp" "BLOCK_INFO *blkiov" "int blkcnt"
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.Sh DESCRIPTION
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.Fn lfs_markv
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rewrites the blocks specified in
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.Fa blkiov
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to new disk locations, for the purposes of grouping them next to one
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another, or to move them out of a segment to clean it.
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All fields of the BLOCK_INFO structure must be filled in, except for
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.Fa bi_segcreate .
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If
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.Fa bi_daddr
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is not the correct current address for logical block
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.Fa bi_lbn
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of the file with inode number
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.Fa bi_inode ,
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or if the file's version number does not match
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.Fa bi_version ,
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the block will not be written to disk, but no error will be returned.
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.Pp
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The
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.Fa fsidp
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argument contains the id of the filesystem to which the inodes and
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blocks belong.
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The
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.Fa bi_bp
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field contains
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.Fa bi_size
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bytes of data to be written into the appropriate block.
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If
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.Fa bi_lbn
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is specified as LFS_UNUSED_LBN, the inode itself will be rewritten.
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.Pp
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The
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.Fa blkiov
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argument is an array of BLOCK_INFO structures (see below).
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The
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.Fa blkcnt
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argument determines the size of the
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.Fa blkiov
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array.
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.Bd -literal
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typedef struct block_info {
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ino_t bi_inode; /* inode # */
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ufs_daddr_t bi_lbn; /* logical block w/in file */
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ufs_daddr_t bi_daddr; /* disk address of block */
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time_t bi_segcreate; /* origin segment create time */
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int bi_version; /* file version number */
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void *bi_bp; /* data buffer */
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int bi_size; /* size of the block (if fragment) */
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} BLOCK_INFO;
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.Ed
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.Sh RETURN VALUES
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.Fn lfs_markv
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returns 0 on success, or \-1 on error.
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.Sh ERRORS
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An error return from
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.Fn lfs_markv
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indicates:
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.Bl -tag -width Er
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.It Bq Er EFAULT
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.Fa fsidp
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points outside the process's allocated address space.
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.It Bq Er EINVAL
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.Fa *fsidp
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does not specify a valid filesystem.
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.It Bq Er EBUSY
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One or more of the inodes whose blocks were to be written was locked,
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and its blocks were not rewritten.
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.El
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.Sh SEE ALSO
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.Xr lfs_segclean 2 ,
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.Xr lfs_segwait 2 ,
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.Xr lfs_cleanerd 8
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.Sh HISTORY
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The
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.Fn lfs_markv
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function call appeared in
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.Bx 4.4 .
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.Sh BUGS
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The functionality of
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.Fn lfs_markv
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does not really belong in user space.
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Among other things it could be used to work around the
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SF_IMMUTABLE
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and
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SF_APPEND
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file flags (see
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.Xr chflags 2 ) .
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