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freebsd-nq/configure.ac
John Gallagher d12614521a Fixes for procfs files backed by linked lists 
There are some issues with the way the seq_file interface is implemented
for kstats backed by linked lists (zfs_dbgmsgs and certain per-pool
debugging info):

* We don't account for the fact that seq_file sometimes visits a node
  multiple times, which results in missing messages when read through
  procfs.
* We don't keep separate state for each reader of a file, so concurrent
  readers will receive incorrect results.
* We don't account for the fact that entries may have been removed from
  the list between read syscalls, so reading from these files in procfs
  can cause the system to crash.

This change fixes these issues and adds procfs_list, a wrapper around a
linked list which abstracts away the details of implementing the
seq_file interface for a list and exposing the contents of the list
through procfs.

Reviewed by: Don Brady <don.brady@delphix.com>
Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed by: Brad Lewis <brad.lewis@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: John Gallagher <john.gallagher@delphix.com>
External-issue: LX-1211
Closes #7819
2018-09-26 11:08:12 -07:00

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/*
* This file is part of the ZFS Linux port.
*
* Copyright (c) 2009 Lawrence Livermore National Security, LLC.
* Produced at Lawrence Livermore National Laboratory
* Written by:
* Brian Behlendorf <behlendorf1@llnl.gov>,
* Herb Wartens <wartens2@llnl.gov>,
* Jim Garlick <garlick@llnl.gov>
* LLNL-CODE-403049
*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
AC_INIT(m4_esyscmd(grep ^Name: META | cut -d ':' -f 2 | tr -d ' \n'),
m4_esyscmd(grep ^Version: META | cut -d ':' -f 2 | tr -d ' \n'))
AC_LANG(C)
ZFS_AC_META
AC_CONFIG_AUX_DIR([config])
AC_CONFIG_MACRO_DIR([config])
AC_CANONICAL_SYSTEM
AM_MAINTAINER_MODE
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AM_INIT_AUTOMAKE([subdir-objects])
AC_CONFIG_HEADERS([zfs_config.h], [
(mv zfs_config.h zfs_config.h.tmp &&
awk -f ${ac_srcdir}/config/config.awk zfs_config.h.tmp >zfs_config.h &&
rm zfs_config.h.tmp) || exit 1])
AC_PROG_INSTALL
AC_PROG_CC
AC_PROG_LIBTOOL
AM_PROG_AS
AM_PROG_CC_C_O
AX_CODE_COVERAGE
_AM_PROG_TAR(pax)
ZFS_AC_LICENSE
ZFS_AC_PACKAGE
ZFS_AC_CONFIG
ZFS_AC_DEBUG
ZFS_AC_DEBUGINFO
ZFS_AC_DEBUG_KMEM
ZFS_AC_DEBUG_KMEM_TRACKING
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udev/rules.d/Makefile
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tests/zfs-tests/tests/functional/cli_root/zfs_send/Makefile
tests/zfs-tests/tests/functional/cli_root/zfs_set/Makefile
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tests/zfs-tests/tests/functional/cli_root/zpool_expand/Makefile
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tests/zfs-tests/tests/functional/cli_root/zpool_history/Makefile
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tests/zfs-tests/tests/functional/cli_root/zpool_import/blockfiles/Makefile
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tests/zfs-tests/tests/functional/cli_root/zpool/Makefile
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AC_OUTPUT
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