zfsd(8), the ZFS fault management daemon
Add zfsd, which deals with hard drive faults in ZFS pools. It manages
hotspares and replements in drive slots that publish physical paths.
cddl/usr.sbin/zfsd
Add zfsd(8) and its unit tests
cddl/usr.sbin/Makefile
Add zfsd to the build
lib/libdevdctl
A C++ library that helps devd clients process events
lib/Makefile
share/mk/bsd.libnames.mk
share/mk/src.libnames.mk
Add libdevdctl to the build. It's a private library, unusable by
out-of-tree software.
etc/defaults/rc.conf
By default, set zfsd_enable to NO
etc/mtree/BSD.include.dist
Add a directory for libdevdctl's include files
etc/mtree/BSD.tests.dist
Add a directory for zfsd's unit tests
etc/mtree/BSD.var.dist
Add /var/db/zfsd/cases, where zfsd stores case files while it's shut
down.
etc/rc.d/Makefile
etc/rc.d/zfsd
Add zfsd's rc script
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c
Fix the resource.fs.zfs.statechange message. It had a number of
problems:
It was only being emitted on a transition to the HEALTHY state.
That made it impossible for zfsd to take actions based on drives
getting sicker.
It compared the new state to vdev_prevstate, which is the state that
the vdev had the last time it was opened. That doesn't make sense,
because a vdev can change state multiple times without being
reopened.
vdev_set_state contains logic that will change the device's new
state based on various conditions. However, the statechange event
was being posted _before_ that logic took effect. Now it's being
posted after.
Submitted by: gibbs, asomers, mav, allanjude
Reviewed by: mav, delphij
Relnotes: yes
Sponsored by: Spectra Logic Corp, iX Systems
Differential Revision: https://reviews.freebsd.org/D6564
2016-05-28 17:43:40 +00:00
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/*-
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* Copyright (c) 2011, 2012, 2013, 2014 Spectra Logic Corporation
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* All rights reserved.
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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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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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* Authors: Justin T. Gibbs (Spectra Logic Corporation)
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*/
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/**
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* \file consumer.cc
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*/
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#include <sys/cdefs.h>
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#include <sys/poll.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <cstdarg>
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#include <cstring>
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#include <list>
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#include <map>
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#include <string>
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#include "guid.h"
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#include "event.h"
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#include "event_factory.h"
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#include "exception.h"
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#include "consumer.h"
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__FBSDID("$FreeBSD$");
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/*================================== Macros ==================================*/
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#define NUM_ELEMENTS(x) (sizeof(x) / sizeof(*x))
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/*============================ Namespace Control =============================*/
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using std::string;
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namespace DevdCtl
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{
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/*============================= Class Definitions ============================*/
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/*----------------------------- DevdCtl::Consumer ----------------------------*/
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//- Consumer Static Private Data -----------------------------------------------
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const char Consumer::s_devdSockPath[] = "/var/run/devd.seqpacket.pipe";
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//- Consumer Public Methods ----------------------------------------------------
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Consumer::Consumer(Event::BuildMethod *defBuilder,
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EventFactory::Record *regEntries,
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size_t numEntries)
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: m_devdSockFD(-1),
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m_eventFactory(defBuilder),
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m_replayingEvents(false)
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{
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m_eventFactory.UpdateRegistry(regEntries, numEntries);
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}
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Consumer::~Consumer()
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{
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DisconnectFromDevd();
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}
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bool
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Consumer::ConnectToDevd()
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{
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struct sockaddr_un devdAddr;
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int sLen;
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int result;
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if (m_devdSockFD != -1) {
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/* Already connected. */
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syslog(LOG_DEBUG, "%s: Already connected.", __func__);
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return (true);
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}
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syslog(LOG_INFO, "%s: Connecting to devd.", __func__);
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memset(&devdAddr, 0, sizeof(devdAddr));
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devdAddr.sun_family= AF_UNIX;
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strlcpy(devdAddr.sun_path, s_devdSockPath, sizeof(devdAddr.sun_path));
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sLen = SUN_LEN(&devdAddr);
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m_devdSockFD = socket(AF_UNIX, SOCK_SEQPACKET, 0);
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if (m_devdSockFD == -1)
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err(1, "Unable to create socket");
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if (fcntl(m_devdSockFD, F_SETFL, O_NONBLOCK) < 0)
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err(1, "fcntl");
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result = connect(m_devdSockFD,
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reinterpret_cast<sockaddr *>(&devdAddr),
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sLen);
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if (result == -1) {
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syslog(LOG_INFO, "Unable to connect to devd");
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DisconnectFromDevd();
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return (false);
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}
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syslog(LOG_INFO, "Connection to devd successful");
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return (true);
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}
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void
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Consumer::DisconnectFromDevd()
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{
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2016-05-31 23:26:45 +00:00
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if (m_devdSockFD != -1) {
|
zfsd(8), the ZFS fault management daemon
Add zfsd, which deals with hard drive faults in ZFS pools. It manages
hotspares and replements in drive slots that publish physical paths.
cddl/usr.sbin/zfsd
Add zfsd(8) and its unit tests
cddl/usr.sbin/Makefile
Add zfsd to the build
lib/libdevdctl
A C++ library that helps devd clients process events
lib/Makefile
share/mk/bsd.libnames.mk
share/mk/src.libnames.mk
Add libdevdctl to the build. It's a private library, unusable by
out-of-tree software.
etc/defaults/rc.conf
By default, set zfsd_enable to NO
etc/mtree/BSD.include.dist
Add a directory for libdevdctl's include files
etc/mtree/BSD.tests.dist
Add a directory for zfsd's unit tests
etc/mtree/BSD.var.dist
Add /var/db/zfsd/cases, where zfsd stores case files while it's shut
down.
etc/rc.d/Makefile
etc/rc.d/zfsd
Add zfsd's rc script
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c
Fix the resource.fs.zfs.statechange message. It had a number of
problems:
It was only being emitted on a transition to the HEALTHY state.
That made it impossible for zfsd to take actions based on drives
getting sicker.
It compared the new state to vdev_prevstate, which is the state that
the vdev had the last time it was opened. That doesn't make sense,
because a vdev can change state multiple times without being
reopened.
vdev_set_state contains logic that will change the device's new
state based on various conditions. However, the statechange event
was being posted _before_ that logic took effect. Now it's being
posted after.
Submitted by: gibbs, asomers, mav, allanjude
Reviewed by: mav, delphij
Relnotes: yes
Sponsored by: Spectra Logic Corp, iX Systems
Differential Revision: https://reviews.freebsd.org/D6564
2016-05-28 17:43:40 +00:00
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syslog(LOG_INFO, "Disconnecting from devd.");
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2016-05-31 23:26:45 +00:00
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close(m_devdSockFD);
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}
|
zfsd(8), the ZFS fault management daemon
Add zfsd, which deals with hard drive faults in ZFS pools. It manages
hotspares and replements in drive slots that publish physical paths.
cddl/usr.sbin/zfsd
Add zfsd(8) and its unit tests
cddl/usr.sbin/Makefile
Add zfsd to the build
lib/libdevdctl
A C++ library that helps devd clients process events
lib/Makefile
share/mk/bsd.libnames.mk
share/mk/src.libnames.mk
Add libdevdctl to the build. It's a private library, unusable by
out-of-tree software.
etc/defaults/rc.conf
By default, set zfsd_enable to NO
etc/mtree/BSD.include.dist
Add a directory for libdevdctl's include files
etc/mtree/BSD.tests.dist
Add a directory for zfsd's unit tests
etc/mtree/BSD.var.dist
Add /var/db/zfsd/cases, where zfsd stores case files while it's shut
down.
etc/rc.d/Makefile
etc/rc.d/zfsd
Add zfsd's rc script
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c
Fix the resource.fs.zfs.statechange message. It had a number of
problems:
It was only being emitted on a transition to the HEALTHY state.
That made it impossible for zfsd to take actions based on drives
getting sicker.
It compared the new state to vdev_prevstate, which is the state that
the vdev had the last time it was opened. That doesn't make sense,
because a vdev can change state multiple times without being
reopened.
vdev_set_state contains logic that will change the device's new
state based on various conditions. However, the statechange event
was being posted _before_ that logic took effect. Now it's being
posted after.
Submitted by: gibbs, asomers, mav, allanjude
Reviewed by: mav, delphij
Relnotes: yes
Sponsored by: Spectra Logic Corp, iX Systems
Differential Revision: https://reviews.freebsd.org/D6564
2016-05-28 17:43:40 +00:00
|
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m_devdSockFD = -1;
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}
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std::string
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Consumer::ReadEvent()
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{
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char buf[MAX_EVENT_SIZE + 1];
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ssize_t len;
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len = ::recv(m_devdSockFD, buf, MAX_EVENT_SIZE, MSG_WAITALL);
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if (len == -1)
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return (std::string(""));
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else {
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/* NULL-terminate the result */
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buf[len] = '\0';
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return (std::string(buf));
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}
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}
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void
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Consumer::ReplayUnconsumedEvents(bool discardUnconsumed)
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{
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EventList::iterator event(m_unconsumedEvents.begin());
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bool replayed_any = (event != m_unconsumedEvents.end());
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m_replayingEvents = true;
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if (replayed_any)
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syslog(LOG_INFO, "Started replaying unconsumed events");
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while (event != m_unconsumedEvents.end()) {
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bool consumed((*event)->Process());
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if (consumed || discardUnconsumed) {
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delete *event;
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event = m_unconsumedEvents.erase(event);
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} else {
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event++;
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}
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}
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if (replayed_any)
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syslog(LOG_INFO, "Finished replaying unconsumed events");
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m_replayingEvents = false;
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}
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bool
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Consumer::SaveEvent(const Event &event)
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|
|
{
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|
|
if (m_replayingEvents)
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|
|
return (false);
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m_unconsumedEvents.push_back(event.DeepCopy());
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|
return (true);
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|
}
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|
Event *
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|
Consumer::NextEvent()
|
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|
|
{
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|
|
if (!Connected())
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return(NULL);
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Event *event(NULL);
|
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|
|
try {
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|
|
string evString;
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|
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|
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evString = ReadEvent();
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|
|
if (! evString.empty()) {
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|
|
Event::TimestampEventString(evString);
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|
|
event = Event::CreateEvent(m_eventFactory, evString);
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|
|
}
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|
|
} catch (const Exception &exp) {
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|
|
exp.Log();
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|
|
DisconnectFromDevd();
|
|
|
|
}
|
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|
return (event);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Capture and process buffered events. */
|
|
|
|
void
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|
|
Consumer::ProcessEvents()
|
|
|
|
{
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|
|
|
Event *event;
|
|
|
|
while ((event = NextEvent()) != NULL) {
|
|
|
|
if (event->Process())
|
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|
|
SaveEvent(*event);
|
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|
|
delete event;
|
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|
|
}
|
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|
}
|
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|
|
void
|
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|
|
Consumer::FlushEvents()
|
|
|
|
{
|
|
|
|
std::string s;
|
|
|
|
|
|
|
|
do
|
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|
|
s = ReadEvent();
|
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|
|
while (! s.empty()) ;
|
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|
|
}
|
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|
bool
|
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|
|
Consumer::EventsPending()
|
|
|
|
{
|
|
|
|
struct pollfd fds[1];
|
|
|
|
int result;
|
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|
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do {
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|
|
fds->fd = m_devdSockFD;
|
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|
|
fds->events = POLLIN;
|
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|
|
fds->revents = 0;
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result = poll(fds, NUM_ELEMENTS(fds), /*timeout*/0);
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|
} while (result == -1 && errno == EINTR);
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|
if (result == -1)
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|
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err(1, "Polling for devd events failed");
|
|
|
|
|
|
|
|
if ((fds->revents & POLLERR) != 0)
|
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|
throw Exception("Consumer::EventsPending(): "
|
|
|
|
"POLLERR detected on devd socket.");
|
|
|
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|
|
if ((fds->revents & POLLHUP) != 0)
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throw Exception("Consumer::EventsPending(): "
|
|
|
|
"POLLHUP detected on devd socket.");
|
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return ((fds->revents & POLLIN) != 0);
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}
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} // namespace DevdCtl
|