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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
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# $FreeBSD$ | ||
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SRCDIR=${.CURDIR}/../../.. | ||
.include "Makefile.common" | ||
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PROG_CXX= zfsd | ||
MAN= zfsd.8 | ||
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.include <bsd.prog.mk> | ||
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# The unittests require devel/googletest and devel/googlemock from ports. | ||
# Don't automatically build them. | ||
SUBDIR= |
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# $FreeBSD$ | ||
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SRCS= callout.cc \ | ||
case_file.cc \ | ||
zfsd_event.cc \ | ||
vdev.cc \ | ||
vdev_iterator.cc \ | ||
zfsd.cc \ | ||
zfsd_exception.cc \ | ||
zpool_list.cc \ | ||
zfsd_main.cc | ||
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WARNS?= 3 | ||
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# Ignore warnings about Solaris specific pragmas. | ||
IGNORE_PRAGMA= YES | ||
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INCFLAGS+= -I${SRCDIR}/cddl/contrib/opensolaris/lib/libzpool/common | ||
INCFLAGS+= -I${SRCDIR}/cddl/compat/opensolaris/include | ||
INCFLAGS+= -I${SRCDIR}/cddl/compat/opensolaris/lib/libumem | ||
INCFLAGS+= -I${SRCDIR}/sys/cddl/compat/opensolaris | ||
INCFLAGS+= -I${SRCDIR}/cddl/contrib/opensolaris/head | ||
INCFLAGS+= -I${SRCDIR}/cddl/contrib/opensolaris/lib/libuutil/common | ||
INCFLAGS+= -I${SRCDIR}/cddl/contrib/opensolaris/lib/libumem/common | ||
INCFLAGS+= -I${SRCDIR}/cddl/contrib/opensolaris/lib/libzfs_core/common | ||
INCFLAGS+= -I${SRCDIR}/cddl/contrib/opensolaris/lib/libzfs/common | ||
INCFLAGS+= -I${SRCDIR}/cddl/contrib/opensolaris/lib/libnvpair | ||
INCFLAGS+= -I${SRCDIR}/sys/cddl/contrib/opensolaris/common/zfs | ||
INCFLAGS+= -I${SRCDIR}/sys/cddl/contrib/opensolaris/uts/common | ||
INCFLAGS+= -I${SRCDIR}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs | ||
INCFLAGS+= -I${SRCDIR}/sys/cddl/contrib/opensolaris/uts/common/sys | ||
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CFLAGS= -g -DNEED_SOLARIS_BOOLEAN ${INCFLAGS} | ||
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DPADD= ${LIBDEVDCTL} ${LIBZFS} ${LIBZFS_CORE} ${LIBUTIL} ${LIBGEOM} \ | ||
${LIBBSDXML} ${LIBSBUF} ${LIBNVPAIR} ${LIBUUTIL} | ||
LIBADD= devdctl zfs zfs_core util geom bsdxml sbuf nvpair uutil | ||
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cscope: | ||
find ${.CURDIR} -type f -a \( -name "*.[ch]" -o -name "*.cc" \) \ | ||
> ${.CURDIR}/cscope.files | ||
cd ${.CURDIR} && cscope -buq ${INCFLAGS} |
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/*- | ||
* Copyright (c) 2011, 2012, 2013 Spectra Logic Corporation | ||
* All rights reserved. | ||
* | ||
* 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, | ||
* without modification. | ||
* 2. Redistributions in binary form must reproduce at minimum a disclaimer | ||
* substantially similar to the "NO WARRANTY" disclaimer below | ||
* ("Disclaimer") and any redistribution must be conditioned upon | ||
* including a substantially similar Disclaimer requirement for further | ||
* binary redistribution. | ||
* | ||
* NO WARRANTY | ||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | ||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. | ||
* | ||
* Authors: Justin T. Gibbs (Spectra Logic Corporation) | ||
* | ||
* $FreeBSD$ | ||
*/ | ||
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/** | ||
* \file callout.cc | ||
* | ||
* \brief Implementation of the Callout class - multi-client | ||
* timer services built on top of the POSIX interval timer. | ||
*/ | ||
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#include <sys/time.h> | ||
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#include <signal.h> | ||
#include <syslog.h> | ||
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#include <climits> | ||
#include <list> | ||
#include <map> | ||
#include <string> | ||
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#include <devdctl/guid.h> | ||
#include <devdctl/event.h> | ||
#include <devdctl/event_factory.h> | ||
#include <devdctl/consumer.h> | ||
#include <devdctl/exception.h> | ||
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#include "callout.h" | ||
#include "vdev_iterator.h" | ||
#include "zfsd.h" | ||
#include "zfsd_exception.h" | ||
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std::list<Callout *> Callout::s_activeCallouts; | ||
bool Callout::s_alarmFired(false); | ||
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void | ||
Callout::Init() | ||
{ | ||
signal(SIGALRM, Callout::AlarmSignalHandler); | ||
} | ||
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bool | ||
Callout::Stop() | ||
{ | ||
if (!IsPending()) | ||
return (false); | ||
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for (std::list<Callout *>::iterator it(s_activeCallouts.begin()); | ||
it != s_activeCallouts.end(); it++) { | ||
if (*it != this) | ||
continue; | ||
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it = s_activeCallouts.erase(it); | ||
if (it != s_activeCallouts.end()) { | ||
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/* | ||
* Maintain correct interval for the | ||
* callouts that follow the just removed | ||
* entry. | ||
*/ | ||
timeradd(&(*it)->m_interval, &m_interval, | ||
&(*it)->m_interval); | ||
} | ||
break; | ||
} | ||
m_pending = false; | ||
return (true); | ||
} | ||
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bool | ||
Callout::Reset(const timeval &interval, CalloutFunc_t *func, void *arg) | ||
{ | ||
bool cancelled(false); | ||
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if (!timerisset(&interval)) | ||
throw ZfsdException("Callout::Reset: interval of 0"); | ||
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cancelled = Stop(); | ||
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m_interval = interval; | ||
m_func = func; | ||
m_arg = arg; | ||
m_pending = true; | ||
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std::list<Callout *>::iterator it(s_activeCallouts.begin()); | ||
for (; it != s_activeCallouts.end(); it++) { | ||
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if (timercmp(&(*it)->m_interval, &m_interval, <=)) { | ||
/* | ||
* Decrease our interval by those that come | ||
* before us. | ||
*/ | ||
timersub(&m_interval, &(*it)->m_interval, &m_interval); | ||
} else { | ||
/* | ||
* Account for the time between the newly | ||
* inserted event and those that follow. | ||
*/ | ||
timersub(&(*it)->m_interval, &m_interval, | ||
&(*it)->m_interval); | ||
break; | ||
} | ||
} | ||
s_activeCallouts.insert(it, this); | ||
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if (s_activeCallouts.front() == this) { | ||
itimerval timerval = { {0, 0}, m_interval }; | ||
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setitimer(ITIMER_REAL, &timerval, NULL); | ||
} | ||
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return (cancelled); | ||
} | ||
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void | ||
Callout::AlarmSignalHandler(int) | ||
{ | ||
s_alarmFired = true; | ||
ZfsDaemon::WakeEventLoop(); | ||
} | ||
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void | ||
Callout::ExpireCallouts() | ||
{ | ||
if (!s_alarmFired) | ||
return; | ||
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s_alarmFired = false; | ||
if (s_activeCallouts.empty()) { | ||
/* Callout removal/SIGALRM race was lost. */ | ||
return; | ||
} | ||
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/* | ||
* Expire the first callout (the one we used to set the | ||
* interval timer) as well as any callouts following that | ||
* expire at the same time (have a zero interval from | ||
* the callout before it). | ||
*/ | ||
do { | ||
Callout *cur(s_activeCallouts.front()); | ||
s_activeCallouts.pop_front(); | ||
cur->m_pending = false; | ||
cur->m_func(cur->m_arg); | ||
} while (!s_activeCallouts.empty() | ||
&& timerisset(&s_activeCallouts.front()->m_interval) == 0); | ||
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if (!s_activeCallouts.empty()) { | ||
Callout *next(s_activeCallouts.front()); | ||
itimerval timerval = { { 0, 0 }, next->m_interval }; | ||
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setitimer(ITIMER_REAL, &timerval, NULL); | ||
} | ||
} | ||
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timeval | ||
Callout::TimeRemaining() const | ||
{ | ||
/* | ||
* Outline: Add the m_interval for each callout in s_activeCallouts | ||
* ahead of this, except for the first callout. Add to that the result | ||
* of getitimer (That's because the first callout stores its original | ||
* interval setting while the timer is ticking). | ||
*/ | ||
itimerval timervalToAlarm; | ||
timeval timeToExpiry; | ||
std::list<Callout *>::iterator it; | ||
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if (!IsPending()) { | ||
timeToExpiry.tv_sec = INT_MAX; | ||
timeToExpiry.tv_usec = 999999; /*maximum normalized value*/ | ||
return (timeToExpiry); | ||
} | ||
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timerclear(&timeToExpiry); | ||
getitimer(ITIMER_REAL, &timervalToAlarm); | ||
timeval& timeToAlarm = timervalToAlarm.it_value; | ||
timeradd(&timeToExpiry, &timeToAlarm, &timeToExpiry); | ||
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it =s_activeCallouts.begin(); | ||
it++; /*skip the first callout in the list*/ | ||
for (; it != s_activeCallouts.end(); it++) { | ||
timeradd(&timeToExpiry, &(*it)->m_interval, &timeToExpiry); | ||
if ((*it) == this) | ||
break; | ||
} | ||
return (timeToExpiry); | ||
} |
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