mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-12-22 13:33:56 +03:00
readahead: wipe out readahead
This commit is contained in:
Daniel Buch
Tom Gundersen
parent
4a3bb59960
commit
d6bc8348d5
@ -1141,34 +1141,6 @@ man/systemd-random-seed.html: man/systemd-random-seed.service.html
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endif
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if ENABLE_READAHEAD
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MANPAGES += \
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man/sd-readahead.3 \
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man/sd_readahead.3 \
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man/systemd-readahead-replay.service.8
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MANPAGES_ALIAS += \
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man/systemd-readahead-collect.service.8 \
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man/systemd-readahead-done.service.8 \
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man/systemd-readahead-done.timer.8 \
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man/systemd-readahead.8
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man/systemd-readahead-collect.service.8: man/systemd-readahead-replay.service.8
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man/systemd-readahead-done.service.8: man/systemd-readahead-replay.service.8
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man/systemd-readahead-done.timer.8: man/systemd-readahead-replay.service.8
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man/systemd-readahead.8: man/systemd-readahead-replay.service.8
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man/systemd-readahead-collect.service.html: man/systemd-readahead-replay.service.html
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$(html-alias)
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man/systemd-readahead-done.service.html: man/systemd-readahead-replay.service.html
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$(html-alias)
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man/systemd-readahead-done.timer.html: man/systemd-readahead-replay.service.html
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$(html-alias)
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man/systemd-readahead.html: man/systemd-readahead-replay.service.html
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$(html-alias)
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endif
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if ENABLE_RESOLVED
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MANPAGES += \
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man/resolved.conf.5 \
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@ -1549,7 +1521,6 @@ EXTRA_DIST += \
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man/sd-id128.xml \
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man/sd-journal.xml \
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man/sd-login.xml \
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man/sd-readahead.xml \
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man/sd_booted.xml \
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man/sd_bus_creds_get_pid.xml \
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man/sd_bus_creds_new_from_pid.xml \
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@ -1591,7 +1562,6 @@ EXTRA_DIST += \
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man/sd_login_monitor_new.xml \
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man/sd_notify.xml \
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man/sd_pid_get_session.xml \
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man/sd_readahead.xml \
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man/sd_seat_get_active.xml \
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man/sd_session_is_active.xml \
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man/sd_uid_get_state.xml \
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@ -1647,7 +1617,6 @@ EXTRA_DIST += \
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man/systemd-path.xml \
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man/systemd-quotacheck.service.xml \
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man/systemd-random-seed.service.xml \
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man/systemd-readahead-replay.service.xml \
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man/systemd-remount-fs.service.xml \
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man/systemd-resolved.service.xml \
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man/systemd-rfkill@.service.xml \
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54
Makefile.am
54
Makefile.am
@ -2346,8 +2346,7 @@ systemctl_LDADD = \
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# ------------------------------------------------------------------------------
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systemd_notify_SOURCES = \
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src/notify/notify.c \
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src/readahead/sd-readahead.c
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src/notify/notify.c
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systemd_notify_LDADD = \
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libsystemd-internal.la \
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@ -4332,57 +4331,6 @@ endif
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EXTRA_DIST += \
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units/systemd-vconsole-setup.service.in
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# ------------------------------------------------------------------------------
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if ENABLE_READAHEAD
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systemd_readahead_SOURCES = \
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src/readahead/readahead.c \
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src/readahead/readahead-collect.c \
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src/readahead/readahead-replay.c \
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src/readahead/readahead-analyze.c \
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src/readahead/readahead-common.c \
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src/readahead/readahead-common.h
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systemd_readahead_LDADD = \
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libsystemd-internal.la \
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libudev-internal.la \
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libsystemd-shared.la
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dist_doc_DATA += \
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src/readahead/sd-readahead.c \
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src/systemd/sd-readahead.h
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rootlibexec_PROGRAMS += \
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systemd-readahead
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dist_systemunit_DATA += \
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units/systemd-readahead-drop.service \
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units/systemd-readahead-done.timer
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nodist_systemunit_DATA += \
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units/systemd-readahead-collect.service \
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units/systemd-readahead-replay.service \
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units/systemd-readahead-done.service
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manual_tests += \
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test-ssd
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test_ssd_SOURCES = \
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src/readahead/test-ssd.c \
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src/readahead/readahead-common.c \
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src/readahead/readahead-common.h
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test_ssd_LDADD = \
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libsystemd-internal.la \
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libudev-internal.la \
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libsystemd-shared.la
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endif
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EXTRA_DIST += \
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units/systemd-readahead-collect.service.in \
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units/systemd-readahead-replay.service.in \
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units/systemd-readahead-done.service.in
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# ------------------------------------------------------------------------------
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if ENABLE_BOOTCHART
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systemd_bootchart_SOURCES = \
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@ -841,14 +841,6 @@ if test "x$enable_vconsole" != "xno"; then
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fi
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AM_CONDITIONAL(ENABLE_VCONSOLE, [test "$have_vconsole" = "yes"])
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# ------------------------------------------------------------------------------
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have_readahead=no
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AC_ARG_ENABLE(readahead, AS_HELP_STRING([--disable-readahead], [disable readahead tools]))
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if test "x$enable_readahead" != "xno"; then
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have_readahead=yes
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fi
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AM_CONDITIONAL(ENABLE_READAHEAD, [test "$have_readahead" = "yes"])
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# ------------------------------------------------------------------------------
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have_bootchart=no
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AC_ARG_ENABLE(bootchart, AS_HELP_STRING([--disable-bootchart], [disable bootchart tool]))
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@ -1341,7 +1333,6 @@ AC_MSG_RESULT([
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ELFUTILS: ${have_elfutils}
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binfmt: ${have_binfmt}
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vconsole: ${have_vconsole}
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readahead: ${have_readahead}
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bootchart: ${have_bootchart}
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quotacheck: ${have_quotacheck}
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tmpfiles: ${have_tmpfiles}
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@ -140,7 +140,6 @@
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<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>fprintf</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-readahead</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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</para>
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</refsect1>
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@ -131,7 +131,6 @@
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<citerefentry><refentrytitle>sd_get_seats</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_login_monitor_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-readahead</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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</para>
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</refsect1>
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@ -1,117 +0,0 @@
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<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="sd-readahead" conditional='ENABLE_READAHEAD'>
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<refentryinfo>
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<title>sd-readahead</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>sd-readahead</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>sd-readahead</refname>
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<refpurpose>Reference implementation of APIs for
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controlling boot-time read-ahead</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include "sd-readahead.h"</funcsynopsisinfo>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><filename>sd-readahead.c</filename> and
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<filename>sd-readahead.h</filename> provide a
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reference implementation for APIs for controlling boot-time
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read-ahead, as implemented by the read-ahead subsystem
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of the
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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init system.</para>
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<para>See
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<citerefentry><refentrytitle>sd_readahead</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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for more information about the function
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implemented.</para>
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</refsect1>
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<refsect1>
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<title>Notes</title>
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<para>This interface is provided by the reference
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implementation of APIs for controlling boot-time
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read-ahead and distributed with the systemd
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package. The algorithms it implements are simple, and
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can easily be reimplemented in daemons if it is
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important to support this interface without using the
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reference implementation. See the respective function
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man pages for details.</para>
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<para>In addition, for details about the algorithms,
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check the liberally licensed reference implementation
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sources:
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<ulink url="http://cgit.freedesktop.org/systemd/systemd/plain/src/readahead/sd-readahead.c"/>
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and <ulink url="http://cgit.freedesktop.org/systemd/systemd/plain/src/systemd/sd-readahead.h"/></para>
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<para>These APIs are implemented in the reference
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implementation's drop-in
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<filename>sd-readahead.c</filename> and
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<filename>sd-readahead.h</filename> files. It is
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recommended that applications consuming these APIs copy
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the implementation into their source tree, either
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verbatim or in excerpts. These interfaces are
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currently not available in a dynamic library.</para>
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<para>The functions provided by this interface become
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NOPs when -DDISABLE_SYSTEMD is set during
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compilation. In addition, if
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<filename>sd-readhead.c</filename> is compiled on
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non-Linux systems it becomes NOPs.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_readahead</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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@ -1,178 +0,0 @@
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<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
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|
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<!--
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This file is part of systemd.
|
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|
||||
Copyright 2010 Lennart Poettering
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
-->
|
||||
|
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<refentry id="sd_readahead" conditional='ENABLE_READAHEAD'>
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|
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<refentryinfo>
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<title>sd_readahead</title>
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<productname>systemd</productname>
|
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
|
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<firstname>Lennart</firstname>
|
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<surname>Poettering</surname>
|
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<email>lennart@poettering.net</email>
|
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</author>
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</authorgroup>
|
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</refentryinfo>
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|
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<refmeta>
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<refentrytitle>sd_readahead</refentrytitle>
|
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<manvolnum>3</manvolnum>
|
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</refmeta>
|
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|
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<refnamediv>
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<refname>sd_readahead</refname>
|
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<refpurpose>Control ongoing disk boot-time read-ahead operations</refpurpose>
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</refnamediv>
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|
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<refsynopsisdiv>
|
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<funcsynopsis>
|
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<funcsynopsisinfo>#include "sd-readahead.h"</funcsynopsisinfo>
|
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|
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<funcprototype>
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<funcdef>int <function>sd_readahead</function></funcdef>
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<paramdef>const char *<parameter>action</parameter></paramdef>
|
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</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
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<refsect1>
|
||||
<title>Description</title>
|
||||
<para><function>sd_readahead()</function> may be
|
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called by programs involved with early boot-up to
|
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control ongoing boot-time disk read-ahead operations. It may be
|
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used to terminate read-ahead operations in case an
|
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uncommon disk access pattern is to be expected and
|
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hence read-ahead replay or collection is unlikely to
|
||||
have the desired speed-up effect on the current or
|
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future boot-ups.</para>
|
||||
|
||||
<para>The <parameter>action</parameter> should be one
|
||||
of the following strings:</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term>cancel</term>
|
||||
|
||||
<listitem><para>Terminates read-ahead
|
||||
data collection, and drops all
|
||||
read-ahead data collected during this
|
||||
boot-up.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term>done</term>
|
||||
|
||||
<listitem><para>Terminates read-ahead
|
||||
data collection, but keeps all
|
||||
read-ahead data collected during this
|
||||
boot-up around for use during
|
||||
subsequent boot-ups.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term>noreplay</term>
|
||||
|
||||
<listitem><para>Terminates read-ahead
|
||||
replay.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>On failure, these calls return a negative
|
||||
errno-style error code. It is generally recommended to
|
||||
ignore the return value of this call.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Notes</title>
|
||||
|
||||
<para>This function is provided by the reference
|
||||
implementation of APIs for controlling boot-time
|
||||
read-ahead and distributed with the systemd
|
||||
package. The algorithm it implements is simple, and
|
||||
can easily be reimplemented in daemons if it is
|
||||
important to support this interface without using the
|
||||
reference implementation.</para>
|
||||
|
||||
<para>Internally, this function creates a file in
|
||||
<filename>/run/systemd/readahead/</filename> which is
|
||||
then used as flag file to notify the read-ahead
|
||||
subsystem.</para>
|
||||
|
||||
<para>For details about the algorithm check the
|
||||
liberally licensed reference implementation sources:
|
||||
<ulink url="http://cgit.freedesktop.org/systemd/systemd/plain/src/readahead/sd-readahead.c"/>
|
||||
and <ulink
|
||||
url="http://cgit.freedesktop.org/systemd/systemd/plain/src/systemd/sd-readahead.h"/></para>
|
||||
|
||||
<para><function>sd_readahead()</function> is
|
||||
implemented in the reference implementation's drop-in
|
||||
<filename>sd-readahead.c</filename> and
|
||||
<filename>sd-readahead.h</filename> files. It is
|
||||
recommended that applications consuming this API copy
|
||||
the implementation into their source tree. For more
|
||||
details about the reference implementation, see
|
||||
<citerefentry><refentrytitle>sd-readahead</refentrytitle><manvolnum>3</manvolnum></citerefentry></para>
|
||||
|
||||
<para>If -DDISABLE_SYSTEMD is set during compilation,
|
||||
this function will always return 0 and otherwise
|
||||
become a NOP.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Examples</title>
|
||||
|
||||
<example>
|
||||
<title>Cancelling all read-ahead operations</title>
|
||||
|
||||
<para>During boots where SELinux has to
|
||||
relabel the file system hierarchy, it will
|
||||
create a large amount of disk accesses that
|
||||
are not necessary during normal boots. Hence
|
||||
it is a good idea to disable both read-ahead replay and read-ahead collection.
|
||||
</para>
|
||||
|
||||
<programlisting>sd_readahead("cancel");
|
||||
sd_readahead("noreplay");</programlisting>
|
||||
</example>
|
||||
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-readahead</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>daemon</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
||||
@ -141,17 +141,6 @@
|
||||
<citerefentry><refentrytitle>sd_booted</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--readahead=</option></term>
|
||||
|
||||
<listitem><para>Controls disk
|
||||
read-ahead operations. The argument
|
||||
must be a string, and either "cancel",
|
||||
"done" or "noreplay". For details
|
||||
about the semantics of this option see
|
||||
<citerefentry><refentrytitle>sd_readahead</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<xi:include href="standard-options.xml" xpointer="help" />
|
||||
<xi:include href="standard-options.xml" xpointer="version" />
|
||||
</variablelist>
|
||||
|
||||
@ -1,203 +0,0 @@
|
||||
<?xml version='1.0'?> <!--*-nxml-*-->
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
|
||||
<!--
|
||||
This file is part of systemd.
|
||||
|
||||
Copyright 2010 Lennart Poettering
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
-->
|
||||
|
||||
<refentry id="systemd-readahead-replay.service" conditional='ENABLE_READAHEAD'
|
||||
xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
|
||||
<refentryinfo>
|
||||
<title>systemd-readahead-replay.service</title>
|
||||
<productname>systemd</productname>
|
||||
|
||||
<authorgroup>
|
||||
<author>
|
||||
<contrib>Developer</contrib>
|
||||
<firstname>Lennart</firstname>
|
||||
<surname>Poettering</surname>
|
||||
<email>lennart@poettering.net</email>
|
||||
</author>
|
||||
</authorgroup>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>systemd-readahead-replay.service</refentrytitle>
|
||||
<manvolnum>8</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>systemd-readahead-replay.service</refname>
|
||||
<refname>systemd-readahead-collect.service</refname>
|
||||
<refname>systemd-readahead-done.service</refname>
|
||||
<refname>systemd-readahead-done.timer</refname>
|
||||
<refname>systemd-readahead</refname>
|
||||
<refpurpose>Disk read ahead logic</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<para><filename>systemd-readahead-replay.service</filename></para>
|
||||
<para><filename>systemd-readahead-collect.service</filename></para>
|
||||
<para><filename>systemd-readahead-done.service</filename></para>
|
||||
<para><filename>systemd-readahead-done.timer</filename></para>
|
||||
<cmdsynopsis>
|
||||
<command>/usr/lib/systemd/systemd-readahead/systemd-readahead</command>
|
||||
<arg choice="opt" rep="repeat">OPTIONS</arg>
|
||||
<arg choice="plain">COMMAND</arg>
|
||||
<arg choice="opt">DIRECTORY | FILE</arg>
|
||||
</cmdsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para><filename>systemd-readahead-collect.service</filename>
|
||||
is a service that collects disk usage patterns at boot
|
||||
time. <filename>systemd-readahead-replay.service</filename>
|
||||
is a service that replays this access data collected
|
||||
at the subsequent boot. Since disks tend to be
|
||||
magnitudes slower than RAM, this is intended to improve
|
||||
boot speeds by pre-loading early at boot all data on
|
||||
disk that is known to be read for the complete boot
|
||||
process.</para>
|
||||
|
||||
<para><filename>systemd-readahead-done.service</filename>
|
||||
is executed a short while after boot completed and signals
|
||||
<filename>systemd-readahead-collect.service</filename>
|
||||
to end data collection. On this signal, this service
|
||||
will then sort the collected disk accesses and store
|
||||
information about them in
|
||||
<filename>/.readahead</filename>.</para>
|
||||
|
||||
<para>Normally, both
|
||||
<filename>systemd-readahead-collect.service</filename>
|
||||
and
|
||||
<filename>systemd-readahead-replay.service</filename>
|
||||
are activated at boot so that access patterns from the
|
||||
preceding boot are replayed and new data collected
|
||||
for the subsequent boot. However, on read-only media
|
||||
where the collected data cannot be stored, it might
|
||||
be a good idea to disable
|
||||
<filename>systemd-readahead-collect.service</filename>.</para>
|
||||
|
||||
<para>On rotating media, when replaying disk accesses
|
||||
at early boot,
|
||||
<filename>systemd-readahead-replay.service</filename>
|
||||
will order read requests by their location on disk. On
|
||||
non-rotating media, they will be ordered by their
|
||||
original access timestamp. If the file system supports
|
||||
it,
|
||||
<filename>systemd-readahead-collect.service</filename>
|
||||
will also defragment and rearrange files on disk to
|
||||
optimize subsequent boot times.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Options</title>
|
||||
|
||||
<para><filename>systemd-readahead</filename> understands
|
||||
the following options:</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><option>--files-max=</option></term>
|
||||
|
||||
<listitem><para>Maximum number of
|
||||
files to read ahead. Only valid
|
||||
for thes <command>collect</command>
|
||||
command.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--file-size-max=</option></term>
|
||||
|
||||
<listitem><para>Maximum size of files
|
||||
in bytes to read ahead. Only valid
|
||||
for the <command>collect</command>
|
||||
and <command>replay</command>
|
||||
commands.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--timeout=</option></term>
|
||||
|
||||
<listitem><para>Maximum time in microseconds
|
||||
to spend collecting data. Only valid
|
||||
for the <command>collect</command>
|
||||
command.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<xi:include href="standard-options.xml" xpointer="help" />
|
||||
<xi:include href="standard-options.xml" xpointer="version" />
|
||||
</variablelist>
|
||||
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Commands</title>
|
||||
|
||||
<para>The following commands are understood by
|
||||
<filename>systemd-readahead</filename>:</para> <variablelist>
|
||||
<varlistentry>
|
||||
<term><command>collect
|
||||
[<replaceable>DIRECTORY</replaceable>]</command></term>
|
||||
<listitem>
|
||||
<para>Collect read-ahead data on
|
||||
early boot. When terminating, it will
|
||||
write out a pack file to the indicated
|
||||
directory containing the read-ahead
|
||||
data. </para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><command>replay
|
||||
[<replaceable>DIRECTORY</replaceable>]</command></term>
|
||||
<listitem>
|
||||
<para>Perform read-ahead on the
|
||||
specified directory tree.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><command>analyze
|
||||
[<replaceable>FILE</replaceable>]</command></term>
|
||||
<listitem>
|
||||
<para>Dumps the content of the
|
||||
read-ahead pack file to the
|
||||
terminal. For each file, the
|
||||
output lists approximately how
|
||||
much will be read ahead by
|
||||
the <command>replay</command>
|
||||
command.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
||||
@ -17,6 +17,5 @@ src/hostname/hostnamed.c
|
||||
src/locale/localed.c
|
||||
src/core/org.freedesktop.systemd1.policy.in
|
||||
src/timedate/timedated.c
|
||||
units/systemd-readahead-done.service.in
|
||||
units/user@.service.in
|
||||
units/debug-shell.service.in
|
||||
|
||||
@ -63,8 +63,7 @@ case "$service" in
|
||||
'--ready[Inform the init system about service start-up completion.]' \
|
||||
'--pid=[Inform the init system about the main PID of the daemon]' \
|
||||
'--status=[Send a free-form status string for the daemon to the init systemd]' \
|
||||
'--booted[Returns 0 if the system was booted up with systemd]' \
|
||||
'--readahead=[Controls disk read-ahead operations]:arguments:(cancel done noreply)'
|
||||
'--booted[Returns 0 if the system was booted up with systemd]'
|
||||
;;
|
||||
systemd-tty-ask-password-agent)
|
||||
_arguments \
|
||||
|
||||
@ -131,7 +131,7 @@ static int create_disk(
|
||||
"Conflicts=umount.target\n"
|
||||
"BindsTo=dev-mapper-%i.device\n"
|
||||
"IgnoreOnIsolate=true\n"
|
||||
"After=systemd-readahead-collect.service systemd-readahead-replay.service cryptsetup-pre.target\n",
|
||||
"After=cryptsetup-pre.target\n",
|
||||
f);
|
||||
|
||||
if (!nofail)
|
||||
|
||||
@ -144,7 +144,6 @@ static int add_cryptsetup(const char *id, const char *what, bool rw, char **devi
|
||||
"Before=umount.target cryptsetup.target\n"
|
||||
"After=%s\n"
|
||||
"IgnoreOnIsolate=true\n"
|
||||
"After=systemd-readahead-collect.service systemd-readahead-replay.service\n\n"
|
||||
"[Service]\n"
|
||||
"Type=oneshot\n"
|
||||
"RemainAfterExit=yes\n"
|
||||
|
||||
@ -31,7 +31,6 @@
|
||||
#include "strv.h"
|
||||
#include "util.h"
|
||||
#include "log.h"
|
||||
#include "sd-readahead.h"
|
||||
#include "build.h"
|
||||
#include "env-util.h"
|
||||
|
||||
@ -39,7 +38,6 @@ static bool arg_ready = false;
|
||||
static pid_t arg_pid = 0;
|
||||
static const char *arg_status = NULL;
|
||||
static bool arg_booted = false;
|
||||
static const char *arg_readahead = NULL;
|
||||
|
||||
static void help(void) {
|
||||
printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n"
|
||||
@ -49,8 +47,7 @@ static void help(void) {
|
||||
" --ready Inform the init system about service start-up completion\n"
|
||||
" --pid[=PID] Set main pid of daemon\n"
|
||||
" --status=TEXT Set status text\n"
|
||||
" --booted Returns 0 if the system was booted up with systemd, non-zero otherwise\n"
|
||||
" --readahead=ACTION Controls read-ahead operations\n",
|
||||
" --booted Returns 0 if the system was booted up with systemd, non-zero otherwise\n",
|
||||
program_invocation_short_name);
|
||||
}
|
||||
|
||||
@ -62,7 +59,6 @@ static int parse_argv(int argc, char *argv[]) {
|
||||
ARG_PID,
|
||||
ARG_STATUS,
|
||||
ARG_BOOTED,
|
||||
ARG_READAHEAD
|
||||
};
|
||||
|
||||
static const struct option options[] = {
|
||||
@ -72,7 +68,6 @@ static int parse_argv(int argc, char *argv[]) {
|
||||
{ "pid", optional_argument, NULL, ARG_PID },
|
||||
{ "status", required_argument, NULL, ARG_STATUS },
|
||||
{ "booted", no_argument, NULL, ARG_BOOTED },
|
||||
{ "readahead", required_argument, NULL, ARG_READAHEAD },
|
||||
{}
|
||||
};
|
||||
|
||||
@ -118,10 +113,6 @@ static int parse_argv(int argc, char *argv[]) {
|
||||
arg_booted = true;
|
||||
break;
|
||||
|
||||
case ARG_READAHEAD:
|
||||
arg_readahead = optarg;
|
||||
break;
|
||||
|
||||
case '?':
|
||||
return -EINVAL;
|
||||
|
||||
@ -134,8 +125,7 @@ static int parse_argv(int argc, char *argv[]) {
|
||||
!arg_ready &&
|
||||
!arg_status &&
|
||||
!arg_pid &&
|
||||
!arg_booted &&
|
||||
!arg_readahead) {
|
||||
!arg_booted) {
|
||||
help();
|
||||
return -EINVAL;
|
||||
}
|
||||
@ -160,14 +150,6 @@ int main(int argc, char* argv[]) {
|
||||
if (arg_booted)
|
||||
return sd_booted() <= 0;
|
||||
|
||||
if (arg_readahead) {
|
||||
r = sd_readahead(arg_readahead);
|
||||
if (r < 0) {
|
||||
log_error("Failed to issue read-ahead control command: %s", strerror(-r));
|
||||
goto finish;
|
||||
}
|
||||
}
|
||||
|
||||
if (arg_ready)
|
||||
our_env[i++] = (char*) "READY=1";
|
||||
|
||||
|
||||
@ -1 +0,0 @@
|
||||
../Makefile
|
||||
@ -1,146 +0,0 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
/***
|
||||
This file is part of systemd.
|
||||
|
||||
Copyright 2012 Auke Kok <auke-jan.h.kok@intel.com>
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
***/
|
||||
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdbool.h>
|
||||
#include <unistd.h>
|
||||
#include <inttypes.h>
|
||||
#include <linux/limits.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "readahead-common.h"
|
||||
|
||||
int main_analyze(const char *pack_path) {
|
||||
char line[LINE_MAX];
|
||||
_cleanup_fclose_ FILE *pack = NULL;
|
||||
int a;
|
||||
int missing = 0;
|
||||
size_t tsize = 0;
|
||||
|
||||
if (!pack_path)
|
||||
pack_path = "/.readahead";
|
||||
|
||||
pack = fopen(pack_path, "re");
|
||||
if (!pack) {
|
||||
log_error("Pack file missing.");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (!fgets(line, sizeof(line), pack)) {
|
||||
log_error("Pack file corrupt.");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
char_array_0(line);
|
||||
|
||||
if (!endswith(line, READAHEAD_PACK_FILE_VERSION)) {
|
||||
log_error("Pack file version incompatible with this parser.");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if ((a = getc(pack)) == EOF) {
|
||||
log_error("Pack file corrupt.");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
fputs(" pct sections size: path\n"
|
||||
" === ======== ====: ====\n", stdout);
|
||||
|
||||
for (;;) {
|
||||
char path[PATH_MAX];
|
||||
struct stat st;
|
||||
uint64_t inode;
|
||||
int pages = 0;
|
||||
int sections = 0;
|
||||
|
||||
if (!fgets(path, sizeof(path), pack))
|
||||
break; /* done */
|
||||
|
||||
path[strlen(path)-1] = 0;
|
||||
|
||||
if (fread(&inode, sizeof(inode), 1, pack) != 1) {
|
||||
log_error("Pack file corrupt.");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
for (;;) {
|
||||
uint32_t b, c;
|
||||
|
||||
if (fread(&b, sizeof(b), 1, pack) != 1 ||
|
||||
fread(&c, sizeof(c), 1, pack) != 1) {
|
||||
log_error("Pack file corrupt.");
|
||||
goto fail;
|
||||
}
|
||||
if ((b == 0) && (c == 0))
|
||||
break;
|
||||
|
||||
/* Uncomment this to get all the chunks separately
|
||||
printf(" %d: %d %d\n", sections, b, c);
|
||||
*/
|
||||
|
||||
pages += (c - b);
|
||||
sections++;
|
||||
}
|
||||
|
||||
if (stat(path, &st) == 0) {
|
||||
off_t size;
|
||||
|
||||
if (sections == 0)
|
||||
size = st.st_size;
|
||||
else
|
||||
size = pages * page_size();
|
||||
|
||||
tsize += size;
|
||||
|
||||
printf(" %4jd%% (%2d) %12jd: %s\n",
|
||||
(intmax_t) (sections && st.st_size ? size * 100 / st.st_size : 100),
|
||||
sections ? sections : 1,
|
||||
(intmax_t) size,
|
||||
path);
|
||||
} else {
|
||||
printf(" %4dp (%2d) %12s: %s (MISSING)\n",
|
||||
sections ? pages : -1,
|
||||
sections ? sections : 1,
|
||||
"???",
|
||||
path);
|
||||
missing++;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
printf("\nHOST: %s"
|
||||
"TYPE: %c\n"
|
||||
"MISSING: %d\n"
|
||||
"TOTAL: %zu\n",
|
||||
line,
|
||||
a,
|
||||
missing,
|
||||
tsize);
|
||||
|
||||
return EXIT_SUCCESS;
|
||||
|
||||
fail:
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
@ -1,650 +0,0 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
/***
|
||||
This file is part of systemd.
|
||||
|
||||
Copyright 2010 Lennart Poettering
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
***/
|
||||
|
||||
#include <errno.h>
|
||||
#include <inttypes.h>
|
||||
#include <fcntl.h>
|
||||
#include <linux/limits.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <sys/select.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <unistd.h>
|
||||
#include <linux/fanotify.h>
|
||||
#include <sys/signalfd.h>
|
||||
#include <sys/poll.h>
|
||||
#include <sys/mman.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/fiemap.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/vfs.h>
|
||||
#include <getopt.h>
|
||||
#include <sys/inotify.h>
|
||||
#include <math.h>
|
||||
|
||||
#ifdef HAVE_LINUX_BTRFS_H
|
||||
#include <linux/btrfs.h>
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_FANOTIFY_INIT
|
||||
#include <sys/fanotify.h>
|
||||
#endif
|
||||
|
||||
#include "systemd/sd-daemon.h"
|
||||
|
||||
#include "missing.h"
|
||||
#include "util.h"
|
||||
#include "set.h"
|
||||
#include "ioprio.h"
|
||||
#include "readahead-common.h"
|
||||
#include "virt.h"
|
||||
|
||||
/* fixme:
|
||||
*
|
||||
* - detect ssd on btrfs/lvm...
|
||||
* - read ahead directories
|
||||
* - gzip?
|
||||
* - remount rw?
|
||||
* - handle files where nothing is in mincore
|
||||
* - does ioprio_set work with fadvise()?
|
||||
*/
|
||||
|
||||
static ReadaheadShared *shared = NULL;
|
||||
static usec_t starttime;
|
||||
|
||||
/* Avoid collisions with the NULL pointer */
|
||||
#define SECTOR_TO_PTR(s) ULONG_TO_PTR((s)+1)
|
||||
#define PTR_TO_SECTOR(p) (PTR_TO_ULONG(p)-1)
|
||||
|
||||
static int btrfs_defrag(int fd) {
|
||||
struct btrfs_ioctl_vol_args data = { .fd = fd };
|
||||
|
||||
return ioctl(fd, BTRFS_IOC_DEFRAG, &data);
|
||||
}
|
||||
|
||||
static int pack_file(FILE *pack, const char *fn, bool on_btrfs) {
|
||||
struct stat st;
|
||||
void *start = MAP_FAILED;
|
||||
uint8_t *vec;
|
||||
uint32_t b, c;
|
||||
uint64_t inode;
|
||||
size_t l, pages;
|
||||
bool mapped;
|
||||
int r = 0, fd = -1, k;
|
||||
|
||||
assert(pack);
|
||||
assert(fn);
|
||||
|
||||
fd = open(fn, O_RDONLY|O_CLOEXEC|O_NOATIME|O_NOCTTY|O_NOFOLLOW);
|
||||
if (fd < 0) {
|
||||
|
||||
if (errno == ENOENT)
|
||||
return 0;
|
||||
|
||||
if (errno == EPERM || errno == EACCES)
|
||||
return 0;
|
||||
|
||||
log_warning("open(%s) failed: %m", fn);
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
k = file_verify(fd, fn, arg_file_size_max, &st);
|
||||
if (k <= 0) {
|
||||
r = k;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (on_btrfs)
|
||||
btrfs_defrag(fd);
|
||||
|
||||
l = PAGE_ALIGN(st.st_size);
|
||||
start = mmap(NULL, l, PROT_READ, MAP_SHARED, fd, 0);
|
||||
if (start == MAP_FAILED) {
|
||||
log_warning("mmap(%s) failed: %m", fn);
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
pages = l / page_size();
|
||||
vec = alloca0(pages);
|
||||
if (mincore(start, l, vec) < 0) {
|
||||
log_warning("mincore(%s) failed: %m", fn);
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
fputs(fn, pack);
|
||||
fputc('\n', pack);
|
||||
|
||||
/* Store the inode, so that we notice when the file is deleted */
|
||||
inode = (uint64_t) st.st_ino;
|
||||
fwrite(&inode, sizeof(inode), 1, pack);
|
||||
|
||||
mapped = false;
|
||||
for (c = 0; c < pages; c++) {
|
||||
bool new_mapped = !!(vec[c] & 1);
|
||||
|
||||
if (!mapped && new_mapped)
|
||||
b = c;
|
||||
else if (mapped && !new_mapped) {
|
||||
fwrite(&b, sizeof(b), 1, pack);
|
||||
fwrite(&c, sizeof(c), 1, pack);
|
||||
|
||||
log_debug("%s: page %u to %u", fn, b, c);
|
||||
}
|
||||
|
||||
mapped = new_mapped;
|
||||
}
|
||||
|
||||
/* We don't write any range data if we should read the entire file */
|
||||
if (mapped && b > 0) {
|
||||
fwrite(&b, sizeof(b), 1, pack);
|
||||
fwrite(&c, sizeof(c), 1, pack);
|
||||
|
||||
log_debug("%s: page %u to %u", fn, b, c);
|
||||
}
|
||||
|
||||
/* End marker */
|
||||
b = 0;
|
||||
fwrite(&b, sizeof(b), 1, pack);
|
||||
fwrite(&b, sizeof(b), 1, pack);
|
||||
|
||||
finish:
|
||||
if (start != MAP_FAILED)
|
||||
munmap(start, l);
|
||||
|
||||
safe_close(fd);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
static unsigned long fd_first_block(int fd) {
|
||||
struct {
|
||||
struct fiemap fiemap;
|
||||
struct fiemap_extent extent;
|
||||
} data = {
|
||||
.fiemap.fm_length = ~0ULL,
|
||||
.fiemap.fm_extent_count = 1,
|
||||
};
|
||||
|
||||
if (ioctl(fd, FS_IOC_FIEMAP, &data) < 0)
|
||||
return 0;
|
||||
|
||||
if (data.fiemap.fm_mapped_extents <= 0)
|
||||
return 0;
|
||||
|
||||
if (data.fiemap.fm_extents[0].fe_flags & FIEMAP_EXTENT_UNKNOWN)
|
||||
return 0;
|
||||
|
||||
return (unsigned long) data.fiemap.fm_extents[0].fe_physical;
|
||||
}
|
||||
|
||||
struct item {
|
||||
const char *path;
|
||||
unsigned long block;
|
||||
unsigned long bin;
|
||||
};
|
||||
|
||||
static int qsort_compare(const void *a, const void *b) {
|
||||
const struct item *i, *j;
|
||||
|
||||
i = a;
|
||||
j = b;
|
||||
|
||||
/* sort by bin first */
|
||||
if (i->bin < j->bin)
|
||||
return -1;
|
||||
if (i->bin > j->bin)
|
||||
return 1;
|
||||
|
||||
/* then sort by sector */
|
||||
if (i->block < j->block)
|
||||
return -1;
|
||||
if (i->block > j->block)
|
||||
return 1;
|
||||
|
||||
return strcmp(i->path, j->path);
|
||||
}
|
||||
|
||||
static int collect(const char *root) {
|
||||
enum {
|
||||
FD_FANOTIFY, /* Get the actual fs events */
|
||||
FD_SIGNAL,
|
||||
FD_INOTIFY, /* We get notifications to quit early via this fd */
|
||||
_FD_MAX
|
||||
};
|
||||
struct pollfd pollfd[_FD_MAX] = {};
|
||||
int fanotify_fd = -1, signal_fd = -1, inotify_fd = -1, r = 0;
|
||||
pid_t my_pid;
|
||||
Hashmap *files = NULL;
|
||||
Iterator i;
|
||||
char *p, *q;
|
||||
sigset_t mask;
|
||||
FILE *pack = NULL;
|
||||
char *pack_fn_new = NULL, *pack_fn = NULL;
|
||||
bool on_ssd, on_btrfs;
|
||||
struct statfs sfs;
|
||||
usec_t not_after;
|
||||
uint64_t previous_block_readahead;
|
||||
bool previous_block_readahead_set = false;
|
||||
|
||||
assert(root);
|
||||
|
||||
if (asprintf(&pack_fn, "%s/.readahead", root) < 0) {
|
||||
r = log_oom();
|
||||
goto finish;
|
||||
}
|
||||
|
||||
starttime = now(CLOCK_MONOTONIC);
|
||||
|
||||
/* If there's no pack file yet we lower the kernel readahead
|
||||
* so that mincore() is accurate. If there is a pack file
|
||||
* already we assume it is accurate enough so that kernel
|
||||
* readahead is never triggered. */
|
||||
previous_block_readahead_set =
|
||||
access(pack_fn, F_OK) < 0 &&
|
||||
block_get_readahead(root, &previous_block_readahead) >= 0 &&
|
||||
block_set_readahead(root, 8*1024) >= 0;
|
||||
|
||||
if (ioprio_set(IOPRIO_WHO_PROCESS, getpid(), IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) < 0)
|
||||
log_warning("Failed to set IDLE IO priority class: %m");
|
||||
|
||||
assert_se(sigemptyset(&mask) == 0);
|
||||
sigset_add_many(&mask, SIGINT, SIGTERM, -1);
|
||||
assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
|
||||
|
||||
if ((signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0) {
|
||||
log_error("signalfd(): %m");
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
files = hashmap_new(&string_hash_ops);
|
||||
if (!files) {
|
||||
log_error("Failed to allocate set.");
|
||||
r = -ENOMEM;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
fanotify_fd = fanotify_init(FAN_CLOEXEC|FAN_NONBLOCK, O_RDONLY|O_LARGEFILE|O_CLOEXEC|O_NOATIME);
|
||||
if (fanotify_fd < 0) {
|
||||
log_error("Failed to create fanotify object: %m");
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (fanotify_mark(fanotify_fd, FAN_MARK_ADD|FAN_MARK_MOUNT, FAN_OPEN, AT_FDCWD, root) < 0) {
|
||||
log_error("Failed to mark %s: %m", root);
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
inotify_fd = open_inotify();
|
||||
if (inotify_fd < 0) {
|
||||
r = inotify_fd;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
not_after = now(CLOCK_MONOTONIC) + arg_timeout;
|
||||
|
||||
my_pid = getpid();
|
||||
|
||||
pollfd[FD_FANOTIFY].fd = fanotify_fd;
|
||||
pollfd[FD_FANOTIFY].events = POLLIN;
|
||||
pollfd[FD_SIGNAL].fd = signal_fd;
|
||||
pollfd[FD_SIGNAL].events = POLLIN;
|
||||
pollfd[FD_INOTIFY].fd = inotify_fd;
|
||||
pollfd[FD_INOTIFY].events = POLLIN;
|
||||
|
||||
sd_notify(0,
|
||||
"READY=1\n"
|
||||
"STATUS=Collecting readahead data");
|
||||
|
||||
log_debug("Collecting...");
|
||||
|
||||
if (access("/run/systemd/readahead/cancel", F_OK) >= 0) {
|
||||
log_debug("Collection canceled");
|
||||
r = -ECANCELED;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (access("/run/systemd/readahead/done", F_OK) >= 0) {
|
||||
log_debug("Got termination request");
|
||||
goto done;
|
||||
}
|
||||
|
||||
for (;;) {
|
||||
union {
|
||||
struct fanotify_event_metadata metadata;
|
||||
char buffer[4096];
|
||||
} data;
|
||||
ssize_t n;
|
||||
struct fanotify_event_metadata *m;
|
||||
usec_t t;
|
||||
int h;
|
||||
|
||||
if (hashmap_size(files) > arg_files_max) {
|
||||
log_debug("Reached maximum number of read ahead files, ending collection.");
|
||||
break;
|
||||
}
|
||||
|
||||
t = now(CLOCK_MONOTONIC);
|
||||
if (t >= not_after) {
|
||||
log_debug("Reached maximum collection time, ending collection.");
|
||||
break;
|
||||
}
|
||||
|
||||
if ((h = poll(pollfd, _FD_MAX, (int) ((not_after - t) / USEC_PER_MSEC))) < 0) {
|
||||
|
||||
if (errno == EINTR)
|
||||
continue;
|
||||
|
||||
log_error("poll(): %m");
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (h == 0) {
|
||||
log_debug("Reached maximum collection time, ending collection.");
|
||||
break;
|
||||
}
|
||||
|
||||
if (pollfd[FD_SIGNAL].revents) {
|
||||
log_debug("Got signal.");
|
||||
break;
|
||||
}
|
||||
|
||||
if (pollfd[FD_INOTIFY].revents) {
|
||||
uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX];
|
||||
struct inotify_event *e;
|
||||
|
||||
if ((n = read(inotify_fd, &inotify_buffer, sizeof(inotify_buffer))) < 0) {
|
||||
if (errno == EINTR || errno == EAGAIN)
|
||||
continue;
|
||||
|
||||
log_error("Failed to read inotify event: %m");
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
e = (struct inotify_event*) inotify_buffer;
|
||||
while (n > 0) {
|
||||
size_t step;
|
||||
|
||||
if ((e->mask & IN_CREATE) && streq(e->name, "cancel")) {
|
||||
log_debug("Collection canceled");
|
||||
r = -ECANCELED;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if ((e->mask & IN_CREATE) && streq(e->name, "done")) {
|
||||
log_debug("Got termination request");
|
||||
goto done;
|
||||
}
|
||||
|
||||
step = sizeof(struct inotify_event) + e->len;
|
||||
assert(step <= (size_t) n);
|
||||
|
||||
e = (struct inotify_event*) ((uint8_t*) e + step);
|
||||
n -= step;
|
||||
}
|
||||
}
|
||||
|
||||
n = read(fanotify_fd, &data, sizeof(data));
|
||||
if (n < 0) {
|
||||
|
||||
if (errno == EINTR || errno == EAGAIN)
|
||||
continue;
|
||||
|
||||
/* fanotify sometimes returns EACCES on read()
|
||||
* where it shouldn't. For now let's just
|
||||
* ignore it here (which is safe), but
|
||||
* eventually this should be
|
||||
* dropped when the kernel is fixed.
|
||||
*
|
||||
* https://bugzilla.redhat.com/show_bug.cgi?id=707577 */
|
||||
if (errno == EACCES)
|
||||
continue;
|
||||
|
||||
log_error("Failed to read event: %m");
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
for (m = &data.metadata; FAN_EVENT_OK(m, n); m = FAN_EVENT_NEXT(m, n)) {
|
||||
char fn[sizeof("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
|
||||
int k;
|
||||
|
||||
if (m->fd < 0)
|
||||
goto next_iteration;
|
||||
|
||||
if (m->pid == my_pid)
|
||||
goto next_iteration;
|
||||
|
||||
__sync_synchronize();
|
||||
if (m->pid == shared->replay)
|
||||
goto next_iteration;
|
||||
|
||||
snprintf(fn, sizeof(fn), "/proc/self/fd/%i", m->fd);
|
||||
k = readlink_malloc(fn, &p);
|
||||
if (k >= 0) {
|
||||
if (startswith(p, "/tmp") ||
|
||||
endswith(p, " (deleted)") ||
|
||||
hashmap_get(files, p))
|
||||
/* Not interesting, or
|
||||
* already read */
|
||||
free(p);
|
||||
else {
|
||||
unsigned long ul;
|
||||
usec_t entrytime;
|
||||
struct item *entry;
|
||||
|
||||
entry = new0(struct item, 1);
|
||||
if (!entry) {
|
||||
r = log_oom();
|
||||
goto finish;
|
||||
}
|
||||
|
||||
ul = fd_first_block(m->fd);
|
||||
|
||||
entrytime = now(CLOCK_MONOTONIC);
|
||||
|
||||
entry->block = ul;
|
||||
entry->path = strdup(p);
|
||||
if (!entry->path) {
|
||||
free(entry);
|
||||
r = log_oom();
|
||||
goto finish;
|
||||
}
|
||||
entry->bin = (entrytime - starttime) / 2000000;
|
||||
|
||||
k = hashmap_put(files, p, entry);
|
||||
if (k < 0) {
|
||||
log_warning("hashmap_put() failed: %s", strerror(-k));
|
||||
free(p);
|
||||
}
|
||||
}
|
||||
|
||||
} else
|
||||
log_warning("readlink(%s) failed: %s", fn, strerror(-k));
|
||||
|
||||
next_iteration:
|
||||
safe_close(m->fd);
|
||||
}
|
||||
}
|
||||
|
||||
done:
|
||||
fanotify_fd = safe_close(fanotify_fd);
|
||||
|
||||
log_debug("Writing Pack File...");
|
||||
|
||||
on_ssd = fs_on_ssd(root) > 0;
|
||||
log_debug("On SSD: %s", yes_no(on_ssd));
|
||||
|
||||
on_btrfs = statfs(root, &sfs) >= 0 && F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC);
|
||||
log_debug("On btrfs: %s", yes_no(on_btrfs));
|
||||
|
||||
if (asprintf(&pack_fn_new, "%s/.readahead.new", root) < 0) {
|
||||
r = log_oom();
|
||||
goto finish;
|
||||
}
|
||||
|
||||
pack = fopen(pack_fn_new, "we");
|
||||
if (!pack) {
|
||||
log_error("Failed to open pack file: %m");
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
fputs(CANONICAL_HOST READAHEAD_PACK_FILE_VERSION, pack);
|
||||
putc(on_ssd ? 'S' : 'R', pack);
|
||||
|
||||
if (on_ssd || on_btrfs) {
|
||||
|
||||
/* On SSD or on btrfs, just write things out in the
|
||||
* order the files were accessed. */
|
||||
|
||||
HASHMAP_FOREACH_KEY(q, p, files, i)
|
||||
pack_file(pack, p, on_btrfs);
|
||||
} else {
|
||||
unsigned n;
|
||||
|
||||
/* On rotating media, order things by the block
|
||||
* numbers */
|
||||
|
||||
log_debug("Ordering...");
|
||||
|
||||
n = hashmap_size(files);
|
||||
if (n) {
|
||||
_cleanup_free_ struct item *ordered;
|
||||
struct item *j;
|
||||
unsigned k;
|
||||
|
||||
ordered = new(struct item, n);
|
||||
if (!ordered) {
|
||||
r = log_oom();
|
||||
goto finish;
|
||||
}
|
||||
|
||||
j = ordered;
|
||||
HASHMAP_FOREACH_KEY(q, p, files, i) {
|
||||
memcpy(j, q, sizeof(struct item));
|
||||
j++;
|
||||
}
|
||||
|
||||
assert(ordered + n == j);
|
||||
|
||||
qsort(ordered, n, sizeof(struct item), qsort_compare);
|
||||
|
||||
for (k = 0; k < n; k++)
|
||||
pack_file(pack, ordered[k].path, on_btrfs);
|
||||
} else
|
||||
log_warning("No pack files");
|
||||
}
|
||||
|
||||
log_debug("Finalizing...");
|
||||
|
||||
fflush(pack);
|
||||
|
||||
if (ferror(pack)) {
|
||||
log_error("Failed to write pack file.");
|
||||
r = -EIO;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (rename(pack_fn_new, pack_fn) < 0) {
|
||||
log_error("Failed to rename readahead file: %m");
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
fclose(pack);
|
||||
pack = NULL;
|
||||
|
||||
log_debug("Done.");
|
||||
|
||||
finish:
|
||||
safe_close(fanotify_fd);
|
||||
safe_close(signal_fd);
|
||||
safe_close(inotify_fd);
|
||||
|
||||
if (pack) {
|
||||
fclose(pack);
|
||||
unlink(pack_fn_new);
|
||||
}
|
||||
free(pack_fn_new);
|
||||
free(pack_fn);
|
||||
|
||||
while ((p = hashmap_steal_first_key(files)))
|
||||
free(p);
|
||||
|
||||
hashmap_free(files);
|
||||
|
||||
if (previous_block_readahead_set) {
|
||||
uint64_t bytes;
|
||||
|
||||
/* Restore the original kernel readahead setting if we
|
||||
* changed it, and nobody has overwritten it since
|
||||
* yet. */
|
||||
if (block_get_readahead(root, &bytes) >= 0 && bytes == 8*1024)
|
||||
block_set_readahead(root, previous_block_readahead);
|
||||
}
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
int main_collect(const char *root) {
|
||||
|
||||
if (!root)
|
||||
root = "/";
|
||||
|
||||
/* Skip this step on read-only media. Note that we check the
|
||||
* underlying block device here, not he read-only flag of the
|
||||
* file system on top, since that one is most likely mounted
|
||||
* read-only anyway at boot, even if the underlying block
|
||||
* device is theoretically writable. */
|
||||
if (fs_on_read_only(root) > 0) {
|
||||
log_info("Disabling readahead collector due to read-only media.");
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
if (!enough_ram()) {
|
||||
log_info("Disabling readahead collector due to low memory.");
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
shared = shared_get();
|
||||
if (!shared)
|
||||
return EXIT_FAILURE;
|
||||
|
||||
shared->collect = getpid();
|
||||
__sync_synchronize();
|
||||
|
||||
if (collect(root) < 0)
|
||||
return EXIT_FAILURE;
|
||||
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
@ -1,398 +0,0 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
/***
|
||||
This file is part of systemd.
|
||||
|
||||
Copyright 2010 Lennart Poettering
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
***/
|
||||
|
||||
#include <errno.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <sys/sysinfo.h>
|
||||
#include <sys/inotify.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/mman.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#include "log.h"
|
||||
#include "readahead-common.h"
|
||||
#include "util.h"
|
||||
#include "missing.h"
|
||||
#include "fileio.h"
|
||||
#include "libudev.h"
|
||||
#include "udev-util.h"
|
||||
|
||||
int file_verify(int fd, const char *fn, off_t file_size_max, struct stat *st) {
|
||||
assert(fd >= 0);
|
||||
assert(fn);
|
||||
assert(st);
|
||||
|
||||
if (fstat(fd, st) < 0) {
|
||||
log_warning("fstat(%s) failed: %m", fn);
|
||||
return -errno;
|
||||
}
|
||||
|
||||
if (!S_ISREG(st->st_mode)) {
|
||||
log_debug("Not preloading special file %s", fn);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (st->st_size <= 0 || st->st_size > file_size_max) {
|
||||
assert_cc(sizeof(st->st_size) == 8);
|
||||
log_debug("Not preloading file %s with size out of bounds %"PRIu64,
|
||||
fn, st->st_size);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int fs_on_ssd(const char *p) {
|
||||
struct stat st;
|
||||
_cleanup_udev_unref_ struct udev *udev = NULL;
|
||||
_cleanup_udev_device_unref_ struct udev_device *udev_device = NULL;
|
||||
struct udev_device *look_at = NULL;
|
||||
const char *devtype, *rotational, *model, *id;
|
||||
int r;
|
||||
|
||||
assert(p);
|
||||
|
||||
if (stat(p, &st) < 0)
|
||||
return -errno;
|
||||
|
||||
if (major(st.st_dev) == 0) {
|
||||
_cleanup_fclose_ FILE *f = NULL;
|
||||
int mount_id;
|
||||
union file_handle_union h = { .handle.handle_bytes = MAX_HANDLE_SZ, };
|
||||
|
||||
/* Might be btrfs, which exposes "ssd" as mount flag if it is on ssd.
|
||||
*
|
||||
* We first determine the mount ID here, if we can,
|
||||
* and then lookup the mount ID in mountinfo to find
|
||||
* the mount options. */
|
||||
|
||||
r = name_to_handle_at(AT_FDCWD, p, &h.handle, &mount_id, AT_SYMLINK_FOLLOW);
|
||||
if (r < 0)
|
||||
return false;
|
||||
|
||||
f = fopen("/proc/self/mountinfo", "re");
|
||||
if (!f)
|
||||
return false;
|
||||
|
||||
for (;;) {
|
||||
char line[LINE_MAX], *e;
|
||||
_cleanup_free_ char *opts = NULL;
|
||||
int mid;
|
||||
|
||||
if (!fgets(line, sizeof(line), f))
|
||||
return false;
|
||||
|
||||
truncate_nl(line);
|
||||
|
||||
if (sscanf(line, "%i", &mid) != 1)
|
||||
continue;
|
||||
|
||||
if (mid != mount_id)
|
||||
continue;
|
||||
|
||||
e = strstr(line, " - ");
|
||||
if (!e)
|
||||
continue;
|
||||
|
||||
if (sscanf(e+3, "%*s %*s %ms", &opts) != 1)
|
||||
continue;
|
||||
|
||||
if (streq(opts, "ssd") || startswith(opts, "ssd,") || endswith(opts, ",ssd") || strstr(opts, ",ssd,"))
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
udev = udev_new();
|
||||
if (!udev)
|
||||
return -ENOMEM;
|
||||
|
||||
udev_device = udev_device_new_from_devnum(udev, 'b', st.st_dev);
|
||||
if (!udev_device)
|
||||
return false;
|
||||
|
||||
devtype = udev_device_get_property_value(udev_device, "DEVTYPE");
|
||||
if (devtype && streq(devtype, "partition"))
|
||||
look_at = udev_device_get_parent(udev_device);
|
||||
else
|
||||
look_at = udev_device;
|
||||
|
||||
if (!look_at)
|
||||
return false;
|
||||
|
||||
/* First, try high-level property */
|
||||
id = udev_device_get_property_value(look_at, "ID_SSD");
|
||||
if (id)
|
||||
return streq(id, "1");
|
||||
|
||||
/* Second, try kernel attribute */
|
||||
rotational = udev_device_get_sysattr_value(look_at, "queue/rotational");
|
||||
if (rotational)
|
||||
return streq(rotational, "0");
|
||||
|
||||
/* Finally, fallback to heuristics */
|
||||
look_at = udev_device_get_parent(look_at);
|
||||
if (!look_at)
|
||||
return false;
|
||||
|
||||
model = udev_device_get_sysattr_value(look_at, "model");
|
||||
if (model)
|
||||
return !!strstr(model, "SSD");
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
int fs_on_read_only(const char *p) {
|
||||
struct stat st;
|
||||
_cleanup_udev_unref_ struct udev *udev = NULL;
|
||||
_cleanup_udev_device_unref_ struct udev_device *udev_device = NULL;
|
||||
const char *read_only;
|
||||
|
||||
assert(p);
|
||||
|
||||
if (stat(p, &st) < 0)
|
||||
return -errno;
|
||||
|
||||
if (major(st.st_dev) == 0)
|
||||
return false;
|
||||
|
||||
udev = udev_new();
|
||||
if (!udev)
|
||||
return -ENOMEM;
|
||||
|
||||
udev_device = udev_device_new_from_devnum(udev, 'b', st.st_dev);
|
||||
if (!udev_device)
|
||||
return false;
|
||||
|
||||
read_only = udev_device_get_sysattr_value(udev_device, "ro");
|
||||
if (read_only)
|
||||
return streq(read_only, "1");
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
bool enough_ram(void) {
|
||||
struct sysinfo si;
|
||||
|
||||
assert_se(sysinfo(&si) >= 0);
|
||||
|
||||
/* Enable readahead only with at least 128MB memory */
|
||||
return si.totalram > 127 * 1024*1024 / si.mem_unit;
|
||||
}
|
||||
|
||||
static void mkdirs(void) {
|
||||
if (mkdir("/run/systemd", 0755) && errno != EEXIST)
|
||||
log_warning("Failed to create /run/systemd: %m");
|
||||
if (mkdir("/run/systemd/readahead", 0755) && errno != EEXIST)
|
||||
log_warning("Failed to create /run/systemd: %m");
|
||||
}
|
||||
|
||||
int open_inotify(void) {
|
||||
int fd;
|
||||
|
||||
fd = inotify_init1(IN_CLOEXEC|IN_NONBLOCK);
|
||||
if (fd < 0) {
|
||||
log_error("Failed to create inotify handle: %m");
|
||||
return -errno;
|
||||
}
|
||||
|
||||
mkdirs();
|
||||
|
||||
if (inotify_add_watch(fd, "/run/systemd/readahead", IN_CREATE) < 0) {
|
||||
log_error("Failed to watch /run/systemd/readahead: %m");
|
||||
safe_close(fd);
|
||||
return -errno;
|
||||
}
|
||||
|
||||
return fd;
|
||||
}
|
||||
|
||||
ReadaheadShared *shared_get(void) {
|
||||
_cleanup_close_ int fd = -1;
|
||||
ReadaheadShared *m = NULL;
|
||||
|
||||
mkdirs();
|
||||
|
||||
fd = open("/run/systemd/readahead/shared", O_CREAT|O_RDWR|O_CLOEXEC, 0644);
|
||||
if (fd < 0) {
|
||||
log_error("Failed to create shared memory segment: %m");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (ftruncate(fd, sizeof(ReadaheadShared)) < 0) {
|
||||
log_error("Failed to truncate shared memory segment: %m");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
m = mmap(NULL, sizeof(ReadaheadShared), PROT_WRITE|PROT_READ, MAP_SHARED, fd, 0);
|
||||
if (m == MAP_FAILED) {
|
||||
log_error("Failed to mmap shared memory segment: %m");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return m;
|
||||
}
|
||||
|
||||
/* We use 20K instead of the more human digestable 16K here. Why?
|
||||
Simply so that it is more unlikely that users end up picking this
|
||||
value too so that we can recognize better whether the user changed
|
||||
the value while we had it temporarily bumped. */
|
||||
#define BUMP_REQUEST_NR (20*1024u)
|
||||
|
||||
int block_bump_request_nr(const char *p) {
|
||||
struct stat st;
|
||||
uint64_t u;
|
||||
char *ap = NULL, *line = NULL;
|
||||
int r;
|
||||
dev_t d;
|
||||
|
||||
assert(p);
|
||||
|
||||
if (stat(p, &st) < 0)
|
||||
return -errno;
|
||||
|
||||
if (major(st.st_dev) == 0)
|
||||
return 0;
|
||||
|
||||
d = st.st_dev;
|
||||
block_get_whole_disk(d, &d);
|
||||
|
||||
if (asprintf(&ap, "/sys/dev/block/%u:%u/queue/nr_requests", major(d), minor(d)) < 0) {
|
||||
r= -ENOMEM;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
r = read_one_line_file(ap, &line);
|
||||
if (r < 0) {
|
||||
if (r == -ENOENT)
|
||||
r = 0;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
r = safe_atou64(line, &u);
|
||||
if (r >= 0 && u >= BUMP_REQUEST_NR) {
|
||||
r = 0;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
free(line);
|
||||
line = NULL;
|
||||
|
||||
if (asprintf(&line, "%u", BUMP_REQUEST_NR) < 0) {
|
||||
r = -ENOMEM;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
r = write_string_file(ap, line);
|
||||
if (r < 0)
|
||||
goto finish;
|
||||
|
||||
log_info("Bumped block_nr parameter of %u:%u to %u. This is a temporary hack and should be removed one day.", major(d), minor(d), BUMP_REQUEST_NR);
|
||||
r = 1;
|
||||
|
||||
finish:
|
||||
free(ap);
|
||||
free(line);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
int block_get_readahead(const char *p, uint64_t *bytes) {
|
||||
struct stat st;
|
||||
char *ap = NULL, *line = NULL;
|
||||
int r;
|
||||
dev_t d;
|
||||
uint64_t u;
|
||||
|
||||
assert(p);
|
||||
assert(bytes);
|
||||
|
||||
if (stat(p, &st) < 0)
|
||||
return -errno;
|
||||
|
||||
if (major(st.st_dev) == 0)
|
||||
return 0;
|
||||
|
||||
d = st.st_dev;
|
||||
block_get_whole_disk(d, &d);
|
||||
|
||||
if (asprintf(&ap, "/sys/dev/block/%u:%u/bdi/read_ahead_kb", major(d), minor(d)) < 0) {
|
||||
r = -ENOMEM;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
r = read_one_line_file(ap, &line);
|
||||
if (r < 0)
|
||||
goto finish;
|
||||
|
||||
r = safe_atou64(line, &u);
|
||||
if (r < 0)
|
||||
goto finish;
|
||||
|
||||
*bytes = u * 1024ULL;
|
||||
|
||||
finish:
|
||||
free(ap);
|
||||
free(line);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
int block_set_readahead(const char *p, uint64_t bytes) {
|
||||
struct stat st;
|
||||
char *ap = NULL, *line = NULL;
|
||||
int r;
|
||||
dev_t d;
|
||||
|
||||
assert(p);
|
||||
assert(bytes);
|
||||
|
||||
if (stat(p, &st) < 0)
|
||||
return -errno;
|
||||
|
||||
if (major(st.st_dev) == 0)
|
||||
return 0;
|
||||
|
||||
d = st.st_dev;
|
||||
block_get_whole_disk(d, &d);
|
||||
|
||||
if (asprintf(&ap, "/sys/dev/block/%u:%u/bdi/read_ahead_kb", major(d), minor(d)) < 0) {
|
||||
r = -ENOMEM;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (asprintf(&line, "%llu", bytes / 1024ULL) < 0) {
|
||||
r = -ENOMEM;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
r = write_string_file(ap, line);
|
||||
if (r < 0)
|
||||
goto finish;
|
||||
|
||||
finish:
|
||||
free(ap);
|
||||
free(line);
|
||||
|
||||
return r;
|
||||
}
|
||||
@ -1,61 +0,0 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
#pragma once
|
||||
|
||||
/***
|
||||
This file is part of systemd.
|
||||
|
||||
Copyright 2010 Lennart Poettering
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
***/
|
||||
|
||||
#include <sys/stat.h>
|
||||
#include <sys/types.h>
|
||||
|
||||
#include "macro.h"
|
||||
#include "util.h"
|
||||
|
||||
#define READAHEAD_FILE_SIZE_MAX (10*1024*1024)
|
||||
|
||||
#define READAHEAD_PACK_FILE_VERSION ";VERSION=2\n"
|
||||
|
||||
extern unsigned arg_files_max;
|
||||
extern off_t arg_file_size_max;
|
||||
extern usec_t arg_timeout;
|
||||
|
||||
int file_verify(int fd, const char *fn, off_t file_size_max, struct stat *st);
|
||||
|
||||
int fs_on_ssd(const char *p);
|
||||
int fs_on_read_only(const char *p);
|
||||
|
||||
bool enough_ram(void);
|
||||
|
||||
int open_inotify(void);
|
||||
|
||||
typedef struct ReadaheadShared {
|
||||
pid_t collect;
|
||||
pid_t replay;
|
||||
} _packed_ ReadaheadShared;
|
||||
|
||||
ReadaheadShared *shared_get(void);
|
||||
|
||||
int block_bump_request_nr(const char *p);
|
||||
|
||||
int block_get_readahead(const char *p, uint64_t *bytes);
|
||||
int block_set_readahead(const char *p, uint64_t bytes);
|
||||
|
||||
int main_collect(const char *root);
|
||||
int main_replay(const char *root);
|
||||
int main_analyze(const char *pack_path);
|
||||
@ -1,281 +0,0 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
/***
|
||||
This file is part of systemd.
|
||||
|
||||
Copyright 2010 Lennart Poettering
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
***/
|
||||
|
||||
#include <errno.h>
|
||||
#include <inttypes.h>
|
||||
#include <fcntl.h>
|
||||
#include <linux/limits.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <sys/select.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <unistd.h>
|
||||
#include <getopt.h>
|
||||
#include <sys/inotify.h>
|
||||
|
||||
#include "systemd/sd-daemon.h"
|
||||
|
||||
#include "missing.h"
|
||||
#include "util.h"
|
||||
#include "set.h"
|
||||
#include "ioprio.h"
|
||||
#include "readahead-common.h"
|
||||
#include "virt.h"
|
||||
|
||||
static ReadaheadShared *shared = NULL;
|
||||
|
||||
static int unpack_file(FILE *pack) {
|
||||
_cleanup_close_ int fd = -1;
|
||||
char fn[PATH_MAX];
|
||||
bool any = false;
|
||||
struct stat st;
|
||||
uint64_t inode;
|
||||
|
||||
assert(pack);
|
||||
|
||||
if (!fgets(fn, sizeof(fn), pack))
|
||||
return 0;
|
||||
|
||||
char_array_0(fn);
|
||||
truncate_nl(fn);
|
||||
|
||||
fd = open(fn, O_RDONLY|O_CLOEXEC|O_NOATIME|O_NOCTTY|O_NOFOLLOW);
|
||||
if (fd < 0) {
|
||||
if (errno != ENOENT && errno != EPERM && errno != EACCES && errno != ELOOP)
|
||||
log_warning("open(%s) failed: %m", fn);
|
||||
|
||||
} else if (file_verify(fd, fn, arg_file_size_max, &st) <= 0)
|
||||
fd = safe_close(fd);
|
||||
|
||||
if (fread(&inode, sizeof(inode), 1, pack) != 1) {
|
||||
log_error("Premature end of pack file.");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
if (fd >= 0) {
|
||||
/* If the inode changed the file got deleted, so just
|
||||
* ignore this entry */
|
||||
if (st.st_ino != (uint64_t) inode)
|
||||
fd = safe_close(fd);
|
||||
}
|
||||
|
||||
for (;;) {
|
||||
uint32_t b, c;
|
||||
|
||||
if (fread(&b, sizeof(b), 1, pack) != 1 ||
|
||||
fread(&c, sizeof(c), 1, pack) != 1) {
|
||||
log_error("Premature end of pack file.");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
if (b == 0 && c == 0)
|
||||
break;
|
||||
|
||||
if (c <= b) {
|
||||
log_error("Invalid pack file.");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
log_debug("%s: page %u to %u", fn, b, c);
|
||||
|
||||
any = true;
|
||||
|
||||
if (fd >= 0) {
|
||||
if (posix_fadvise(fd, b * page_size(), (c - b) * page_size(), POSIX_FADV_WILLNEED) < 0) {
|
||||
log_warning("posix_fadvise() failed: %m");
|
||||
return -errno;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!any && fd >= 0) {
|
||||
/* if no range is encoded in the pack file this is
|
||||
* intended to mean that the whole file shall be
|
||||
* read */
|
||||
|
||||
if (posix_fadvise(fd, 0, st.st_size, POSIX_FADV_WILLNEED) < 0) {
|
||||
log_warning("posix_fadvise() failed: %m");
|
||||
return -errno;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int replay(const char *root) {
|
||||
_cleanup_close_ int inotify_fd = -1;
|
||||
_cleanup_free_ char *pack_fn = NULL;
|
||||
_cleanup_fclose_ FILE *pack = NULL;
|
||||
bool on_ssd, ready = false;
|
||||
char line[LINE_MAX];
|
||||
int prio, c;
|
||||
|
||||
assert(root);
|
||||
|
||||
block_bump_request_nr(root);
|
||||
|
||||
if (asprintf(&pack_fn, "%s/.readahead", root) < 0)
|
||||
return log_oom();
|
||||
|
||||
pack = fopen(pack_fn, "re");
|
||||
if (!pack) {
|
||||
if (errno == ENOENT) {
|
||||
log_debug("No pack file found.");
|
||||
return 0;
|
||||
}
|
||||
|
||||
log_error("Failed to open pack file: %m");
|
||||
return -errno;
|
||||
}
|
||||
|
||||
posix_fadvise(fileno(pack), 0, 0, POSIX_FADV_WILLNEED);
|
||||
|
||||
inotify_fd = open_inotify();
|
||||
if (inotify_fd < 0)
|
||||
return inotify_fd;
|
||||
|
||||
if (!fgets(line, sizeof(line), pack)) {
|
||||
log_error("Premature end of pack file.");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
char_array_0(line);
|
||||
|
||||
if (!streq(line, CANONICAL_HOST READAHEAD_PACK_FILE_VERSION)) {
|
||||
log_debug("Pack file host or version type mismatch.");
|
||||
goto done;
|
||||
}
|
||||
|
||||
c = getc(pack);
|
||||
if (c == EOF) {
|
||||
log_debug("Premature end of pack file.");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* We do not retest SSD here, so that we can start replaying
|
||||
* before udev is up.*/
|
||||
on_ssd = c == 'S';
|
||||
log_debug("On SSD: %s", yes_no(on_ssd));
|
||||
|
||||
if (on_ssd)
|
||||
prio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0);
|
||||
else
|
||||
/* We are not using RT here, since we'd starve IO that
|
||||
we didn't record (which is for example blkid, since
|
||||
its disk accesses go directly to the block device and
|
||||
are thus not visible in fallocate) to death. However,
|
||||
we do ask for an IO prio that is slightly higher than
|
||||
the default (which is BE. 4) */
|
||||
prio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 2);
|
||||
|
||||
if (ioprio_set(IOPRIO_WHO_PROCESS, getpid(), prio) < 0)
|
||||
log_warning("Failed to set IDLE IO priority class: %m");
|
||||
|
||||
sd_notify(0, "STATUS=Replaying readahead data");
|
||||
|
||||
log_debug("Replaying...");
|
||||
|
||||
if (access("/run/systemd/readahead/noreplay", F_OK) >= 0) {
|
||||
log_debug("Got termination request");
|
||||
goto done;
|
||||
}
|
||||
|
||||
while (!feof(pack) && !ferror(pack)) {
|
||||
uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX];
|
||||
int k;
|
||||
ssize_t n;
|
||||
|
||||
n = read(inotify_fd, &inotify_buffer, sizeof(inotify_buffer));
|
||||
if (n < 0) {
|
||||
if (errno != EINTR && errno != EAGAIN) {
|
||||
log_error("Failed to read inotify event: %m");
|
||||
return -errno;
|
||||
}
|
||||
} else {
|
||||
struct inotify_event *e = (struct inotify_event*) inotify_buffer;
|
||||
|
||||
while (n > 0) {
|
||||
size_t step;
|
||||
|
||||
if ((e->mask & IN_CREATE) && streq(e->name, "noreplay")) {
|
||||
log_debug("Got termination request");
|
||||
goto done;
|
||||
}
|
||||
|
||||
step = sizeof(struct inotify_event) + e->len;
|
||||
assert(step <= (size_t) n);
|
||||
|
||||
e = (struct inotify_event*) ((uint8_t*) e + step);
|
||||
n -= step;
|
||||
}
|
||||
}
|
||||
|
||||
k = unpack_file(pack);
|
||||
if (k < 0)
|
||||
return k;
|
||||
|
||||
if (!ready) {
|
||||
/* We delay the ready notification until we
|
||||
* queued at least one read */
|
||||
sd_notify(0, "READY=1");
|
||||
ready = true;
|
||||
}
|
||||
}
|
||||
|
||||
done:
|
||||
if (ferror(pack)) {
|
||||
log_error("Failed to read pack file.");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
if (!ready)
|
||||
sd_notify(0, "READY=1");
|
||||
|
||||
log_debug("Done.");
|
||||
return 0;
|
||||
}
|
||||
|
||||
int main_replay(const char *root) {
|
||||
|
||||
if (!root)
|
||||
root = "/";
|
||||
|
||||
if (!enough_ram()) {
|
||||
log_info("Disabling readahead replay due to low memory.");
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
shared = shared_get();
|
||||
if (!shared)
|
||||
return EXIT_FAILURE;
|
||||
|
||||
shared->replay = getpid();
|
||||
__sync_synchronize();
|
||||
|
||||
if (replay(root) < 0)
|
||||
return EXIT_FAILURE;
|
||||
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
@ -1,163 +0,0 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
/***
|
||||
This file is part of systemd.
|
||||
|
||||
Copyright 2012 Lennart Poettering
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
***/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <getopt.h>
|
||||
#include <stddef.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "util.h"
|
||||
#include "def.h"
|
||||
#include "build.h"
|
||||
#include "readahead-common.h"
|
||||
|
||||
unsigned arg_files_max = 16*1024;
|
||||
off_t arg_file_size_max = READAHEAD_FILE_SIZE_MAX;
|
||||
usec_t arg_timeout = 2*USEC_PER_MINUTE;
|
||||
|
||||
static void help(void) {
|
||||
printf("%1$s [OPTIONS...] collect [DIRECTORY]\n\n"
|
||||
"Collect read-ahead data on early boot.\n\n"
|
||||
" -h --help Show this help\n"
|
||||
" --version Show package version\n"
|
||||
" --files-max=INT Maximum number of files to read ahead\n"
|
||||
" --file-size-max=BYTES Maximum size of files to read ahead\n"
|
||||
" --timeout=USEC Maximum time to spend collecting data\n"
|
||||
"\n\n"
|
||||
"%1$s [OPTIONS...] replay [DIRECTORY]\n\n"
|
||||
"Replay collected read-ahead data on early boot.\n\n"
|
||||
" -h --help Show this help\n"
|
||||
" --version Show package version\n"
|
||||
" --file-size-max=BYTES Maximum size of files to read ahead\n"
|
||||
"\n\n"
|
||||
"%1$s [OPTIONS...] analyze [PACK-FILE]\n\n"
|
||||
"Analyze collected read-ahead data.\n\n"
|
||||
" -h --help Show this help\n"
|
||||
" --version Show package version\n",
|
||||
program_invocation_short_name);
|
||||
}
|
||||
|
||||
static int parse_argv(int argc, char *argv[]) {
|
||||
|
||||
enum {
|
||||
ARG_VERSION = 0x100,
|
||||
ARG_FILES_MAX,
|
||||
ARG_FILE_SIZE_MAX,
|
||||
ARG_TIMEOUT
|
||||
};
|
||||
|
||||
static const struct option options[] = {
|
||||
{ "help", no_argument, NULL, 'h' },
|
||||
{ "version", no_argument, NULL, ARG_VERSION },
|
||||
{ "files-max", required_argument, NULL, ARG_FILES_MAX },
|
||||
{ "file-size-max", required_argument, NULL, ARG_FILE_SIZE_MAX },
|
||||
{ "timeout", required_argument, NULL, ARG_TIMEOUT },
|
||||
{}
|
||||
};
|
||||
|
||||
int c;
|
||||
|
||||
assert(argc >= 0);
|
||||
assert(argv);
|
||||
|
||||
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
|
||||
|
||||
switch (c) {
|
||||
|
||||
case 'h':
|
||||
help();
|
||||
return 0;
|
||||
|
||||
case ARG_VERSION:
|
||||
puts(PACKAGE_STRING);
|
||||
puts(SYSTEMD_FEATURES);
|
||||
return 0;
|
||||
|
||||
case ARG_FILES_MAX:
|
||||
if (safe_atou(optarg, &arg_files_max) < 0 || arg_files_max <= 0) {
|
||||
log_error("Failed to parse maximum number of files %s.", optarg);
|
||||
return -EINVAL;
|
||||
}
|
||||
break;
|
||||
|
||||
case ARG_FILE_SIZE_MAX: {
|
||||
unsigned long long ull;
|
||||
|
||||
if (safe_atollu(optarg, &ull) < 0 || ull <= 0) {
|
||||
log_error("Failed to parse maximum file size %s.", optarg);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
arg_file_size_max = (off_t) ull;
|
||||
break;
|
||||
}
|
||||
|
||||
case ARG_TIMEOUT:
|
||||
if (parse_sec(optarg, &arg_timeout) < 0 || arg_timeout <= 0) {
|
||||
log_error("Failed to parse timeout %s.", optarg);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
case '?':
|
||||
return -EINVAL;
|
||||
|
||||
default:
|
||||
assert_not_reached("Unhandled option");
|
||||
}
|
||||
|
||||
if (optind != argc-1 &&
|
||||
optind != argc-2) {
|
||||
log_error("%s: wrong number of arguments.",
|
||||
program_invocation_short_name);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
int r;
|
||||
|
||||
log_set_target(LOG_TARGET_SAFE);
|
||||
log_parse_environment();
|
||||
log_open();
|
||||
|
||||
umask(0022);
|
||||
|
||||
r = parse_argv(argc, argv);
|
||||
if (r <= 0)
|
||||
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
|
||||
|
||||
if (streq(argv[optind], "collect"))
|
||||
return main_collect(argv[optind+1]);
|
||||
else if (streq(argv[optind], "replay"))
|
||||
return main_replay(argv[optind+1]);
|
||||
else if (streq(argv[optind], "analyze"))
|
||||
return main_analyze(argv[optind+1]);
|
||||
|
||||
log_error("Unknown verb %s.", argv[optind]);
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
@ -1,89 +0,0 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
/***
|
||||
Copyright 2010 Lennart Poettering
|
||||
|
||||
Permission is hereby granted, free of charge, to any person
|
||||
obtaining a copy of this software and associated documentation files
|
||||
(the "Software"), to deal in the Software without restriction,
|
||||
including without limitation the rights to use, copy, modify, merge,
|
||||
publish, distribute, sublicense, and/or sell copies of the Software,
|
||||
and to permit persons to whom the Software is furnished to do so,
|
||||
subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be
|
||||
included in all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
||||
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
||||
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
||||
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
SOFTWARE.
|
||||
***/
|
||||
|
||||
#ifndef _GNU_SOURCE
|
||||
# define _GNU_SOURCE
|
||||
#endif
|
||||
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <sys/stat.h>
|
||||
#include <sys/types.h>
|
||||
#include <fcntl.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "sd-readahead.h"
|
||||
|
||||
#if (__GNUC__ >= 4)
|
||||
# ifdef SD_EXPORT_SYMBOLS
|
||||
/* Export symbols */
|
||||
# define _sd_export_ __attribute__ ((visibility("default")))
|
||||
# else
|
||||
/* Don't export the symbols */
|
||||
# define _sd_export_ __attribute__ ((visibility("hidden")))
|
||||
# endif
|
||||
#else
|
||||
# define _sd_export_
|
||||
#endif
|
||||
|
||||
static int touch(const char *path) {
|
||||
|
||||
#if !defined(DISABLE_SYSTEMD) && defined(__linux__)
|
||||
int fd;
|
||||
|
||||
mkdir("/run/systemd", 0755);
|
||||
mkdir("/run/systemd/readahead", 0755);
|
||||
|
||||
fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0666);
|
||||
if (fd < 0)
|
||||
return -errno;
|
||||
|
||||
for (;;) {
|
||||
if (close(fd) >= 0)
|
||||
break;
|
||||
|
||||
if (errno != EINTR)
|
||||
return -errno;
|
||||
}
|
||||
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
_sd_export_ int sd_readahead(const char *action) {
|
||||
|
||||
if (!action)
|
||||
return -EINVAL;
|
||||
|
||||
if (strcmp(action, "cancel") == 0)
|
||||
return touch("/run/systemd/readahead/cancel");
|
||||
else if (strcmp(action, "done") == 0)
|
||||
return touch("/run/systemd/readahead/done");
|
||||
else if (strcmp(action, "noreplay") == 0)
|
||||
return touch("/run/systemd/readahead/noreplay");
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
@ -1,41 +0,0 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
/***
|
||||
This file is part of systemd.
|
||||
|
||||
Copyright 2014 Zbigniew Jędrzejewski-Szmek
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
***/
|
||||
|
||||
#include "readahead-common.h"
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
int i;
|
||||
|
||||
for (i = 1; i < argc; i++) {
|
||||
char *name = argv[i];
|
||||
int r;
|
||||
|
||||
r = fs_on_ssd(name);
|
||||
if (r < 0) {
|
||||
log_error("%s: %s", name, strerror(-r));
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
|
||||
log_info("%s: %s", name, r ? "SSD" : "---");
|
||||
}
|
||||
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
@ -1,73 +0,0 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
#ifndef foosdreadaheadhfoo
|
||||
#define foosdreadaheadhfoo
|
||||
|
||||
/***
|
||||
Copyright 2010 Lennart Poettering
|
||||
|
||||
Permission is hereby granted, free of charge, to any person
|
||||
obtaining a copy of this software and associated documentation files
|
||||
(the "Software"), to deal in the Software without restriction,
|
||||
including without limitation the rights to use, copy, modify, merge,
|
||||
publish, distribute, sublicense, and/or sell copies of the Software,
|
||||
and to permit persons to whom the Software is furnished to do so,
|
||||
subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be
|
||||
included in all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
||||
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
||||
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
||||
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
SOFTWARE.
|
||||
***/
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/*
|
||||
Reference implementation of a few boot read-ahead-related
|
||||
interfaces. These interfaces are trivial to implement. To simplify
|
||||
porting, we provide this reference implementation. Applications are
|
||||
welcome to reimplement the algorithms described here if they do not
|
||||
want to include these two source files.
|
||||
|
||||
You may compile this with -DDISABLE_SYSTEMD to disable systemd
|
||||
support. This makes all calls NOPs.
|
||||
|
||||
Because this is drop-in code, we don't want any of our symbols to be
|
||||
exported in any case. Hence, we declare hidden visibility for all of
|
||||
them.
|
||||
|
||||
You may find an up-to-date version of these source files online:
|
||||
|
||||
http://cgit.freedesktop.org/systemd/systemd/plain/src/systemd/sd-readahead.h
|
||||
http://cgit.freedesktop.org/systemd/systemd/plain/src/readahead/sd-readahead.c
|
||||
|
||||
This should compile on non-Linux systems too, but all functions
|
||||
will become NOPs.
|
||||
|
||||
See sd-readahead(3) for more information.
|
||||
*/
|
||||
|
||||
/*
|
||||
Controls on-going disk read-ahead operations during boot-up. The argument
|
||||
must be one of the following strings: "cancel", "done", or "noreplay".
|
||||
|
||||
cancel = terminate read-ahead data collection, and drop collected information
|
||||
done = terminate read-ahead data collection, and keep collected information
|
||||
noreplay = terminate read-ahead replay
|
||||
*/
|
||||
int sd_readahead(const char *action);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
@ -10,7 +10,6 @@
|
||||
|
||||
enable remote-fs.target
|
||||
enable getty@.service
|
||||
enable systemd-readahead-*
|
||||
enable systemd-timesyncd.service
|
||||
enable systemd-networkd.service
|
||||
enable systemd-resolved.service
|
||||
|
||||
3
units/.gitignore
vendored
3
units/.gitignore
vendored
@ -47,9 +47,6 @@
|
||||
/systemd-poweroff.service
|
||||
/systemd-quotacheck.service
|
||||
/systemd-random-seed.service
|
||||
/systemd-readahead-collect.service
|
||||
/systemd-readahead-done.service
|
||||
/systemd-readahead-replay.service
|
||||
/systemd-reboot.service
|
||||
/systemd-remount-fs.service
|
||||
/systemd-resolved.service
|
||||
|
||||
@ -10,7 +10,7 @@ Description=Rebuild Dynamic Linker Cache
|
||||
Documentation=man:ldconfig(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service
|
||||
After=systemd-remount-fs.service
|
||||
Before=sysinit.target shutdown.target systemd-update-done.service
|
||||
ConditionNeedsUpdate=/etc
|
||||
|
||||
|
||||
@ -9,7 +9,7 @@
|
||||
Description=Enable File System Quotas
|
||||
Documentation=man:quotaon(8)
|
||||
DefaultDependencies=no
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-quotacheck.service
|
||||
After=systemd-quotacheck.service
|
||||
Before=local-fs.target shutdown.target
|
||||
ConditionPathExists=@QUOTAON@
|
||||
|
||||
|
||||
@ -10,7 +10,7 @@ Description=System Update
|
||||
Documentation=http://freedesktop.org/wiki/Software/systemd/SystemUpdates
|
||||
Documentation=man:systemd.special(7) man:systemd-system-update-generator(8)
|
||||
Requires=sysinit.target
|
||||
Conflicts=shutdown.target systemd-readahead-collect.service systemd-readahead-replay.service
|
||||
Conflicts=shutdown.target
|
||||
After=sysinit.target
|
||||
Before=shutdown.target
|
||||
AllowIsolate=yes
|
||||
|
||||
@ -11,7 +11,7 @@ Documentation=man:systemd-backlight@.service(8)
|
||||
DefaultDependencies=no
|
||||
RequiresMountsFor=/var/lib/systemd/backlight
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service
|
||||
After=systemd-remount-fs.service
|
||||
Before=sysinit.target shutdown.target
|
||||
|
||||
[Service]
|
||||
|
||||
@ -11,7 +11,7 @@ Documentation=man:systemd-binfmt.service(8) man:binfmt.d(5)
|
||||
Documentation=https://www.kernel.org/doc/Documentation/binfmt_misc.txt
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service proc-sys-fs-binfmt_misc.automount
|
||||
After=proc-sys-fs-binfmt_misc.automount
|
||||
Before=sysinit.target shutdown.target
|
||||
ConditionPathIsReadWrite=/proc/sys/
|
||||
ConditionDirectoryNotEmpty=|/lib/binfmt.d
|
||||
|
||||
@ -10,7 +10,7 @@ Description=First Boot Wizard
|
||||
Documentation=man:systemd-firstboot(1)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service systemd-sysusers.service
|
||||
After=systemd-remount-fs.service systemd-sysusers.service
|
||||
Before=sysinit.target shutdown.target
|
||||
ConditionPathIsReadWrite=/etc
|
||||
ConditionFirstBoot=yes
|
||||
|
||||
@ -9,7 +9,6 @@
|
||||
Description=File System Check on Root Device
|
||||
Documentation=man:systemd-fsck-root.service(8)
|
||||
DefaultDependencies=no
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service
|
||||
Before=local-fs.target shutdown.target
|
||||
ConditionPathIsReadWrite=!/
|
||||
|
||||
|
||||
@ -10,7 +10,7 @@ Description=File System Check on %f
|
||||
Documentation=man:systemd-fsck@.service(8)
|
||||
DefaultDependencies=no
|
||||
BindsTo=%i.device
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service %i.device systemd-fsck-root.service local-fs-pre.target
|
||||
After=%i.device systemd-fsck-root.service local-fs-pre.target
|
||||
Before=shutdown.target
|
||||
|
||||
[Service]
|
||||
|
||||
@ -10,7 +10,7 @@ Description=Rebuild Journal Catalog
|
||||
Documentation=man:systemd-journald.service(8) man:journald.conf(5)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service local-fs.target
|
||||
After=local-fs.target
|
||||
Before=sysinit.target shutdown.target systemd-update-done.service
|
||||
ConditionNeedsUpdate=/etc
|
||||
|
||||
|
||||
@ -10,7 +10,6 @@ Description=Load Kernel Modules
|
||||
Documentation=man:systemd-modules-load.service(8) man:modules-load.d(5)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service
|
||||
Before=sysinit.target shutdown.target
|
||||
ConditionCapability=CAP_SYS_MODULE
|
||||
ConditionDirectoryNotEmpty=|/lib/modules-load.d
|
||||
|
||||
@ -9,7 +9,7 @@
|
||||
Description=File System Quota Check
|
||||
Documentation=man:systemd-quotacheck.service(8)
|
||||
DefaultDependencies=no
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service
|
||||
After=systemd-remount-fs.service
|
||||
Before=local-fs.target shutdown.target
|
||||
ConditionPathExists=@QUOTACHECK@
|
||||
|
||||
|
||||
@ -11,7 +11,7 @@ Documentation=man:systemd-random-seed.service(8) man:random(4)
|
||||
DefaultDependencies=no
|
||||
RequiresMountsFor=@RANDOM_SEED@
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service
|
||||
After=systemd-remount-fs.service
|
||||
Before=sysinit.target shutdown.target
|
||||
|
||||
[Service]
|
||||
|
||||
@ -1,28 +0,0 @@
|
||||
# This file is part of systemd.
|
||||
#
|
||||
# systemd is free software; you can redistribute it and/or modify it
|
||||
# under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation; either version 2.1 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
[Unit]
|
||||
Description=Collect Read-Ahead Data
|
||||
Documentation=man:systemd-readahead-replay.service(8)
|
||||
DefaultDependencies=no
|
||||
Wants=systemd-readahead-done.timer
|
||||
Conflicts=shutdown.target
|
||||
Before=sysinit.target shutdown.target
|
||||
ConditionPathExists=!/run/systemd/readahead/cancel
|
||||
ConditionPathExists=!/run/systemd/readahead/done
|
||||
ConditionVirtualization=no
|
||||
|
||||
[Service]
|
||||
Type=notify
|
||||
ExecStart=@rootlibexecdir@/systemd-readahead collect
|
||||
RemainAfterExit=yes
|
||||
StandardOutput=null
|
||||
OOMScoreAdjust=1000
|
||||
|
||||
[Install]
|
||||
WantedBy=default.target
|
||||
Also=systemd-readahead-drop.service
|
||||
@ -1,22 +0,0 @@
|
||||
# This file is part of systemd.
|
||||
#
|
||||
# systemd is free software; you can redistribute it and/or modify it
|
||||
# under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation; either version 2.1 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
[Unit]
|
||||
Description=Stop Read-Ahead Data Collection
|
||||
Documentation=man:systemd-readahead-replay.service(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=default.target
|
||||
Before=shutdown.target
|
||||
ConditionVirtualization=no
|
||||
|
||||
[Service]
|
||||
Type=oneshot
|
||||
ExecStart=@SYSTEMD_NOTIFY@ --readahead=done
|
||||
|
||||
[Install]
|
||||
Also=systemd-readahead-collect.service
|
||||
@ -1,22 +0,0 @@
|
||||
# This file is part of systemd.
|
||||
#
|
||||
# systemd is free software; you can redistribute it and/or modify it
|
||||
# under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation; either version 2.1 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
[Unit]
|
||||
Description=Stop Read-Ahead Data Collection 10s After Completed Startup
|
||||
Documentation=man:systemd-readahead-replay.service(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=default.target
|
||||
Before=shutdown.target
|
||||
ConditionVirtualization=no
|
||||
|
||||
[Timer]
|
||||
OnActiveSec=30s
|
||||
AccuracySec=1s
|
||||
|
||||
[Install]
|
||||
Also=systemd-readahead-collect.service
|
||||
@ -1,19 +0,0 @@
|
||||
# This file is part of systemd.
|
||||
#
|
||||
# systemd is free software; you can redistribute it and/or modify it
|
||||
# under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation; either version 2.1 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
[Unit]
|
||||
Description=Drop Read-Ahead Data
|
||||
Documentation=man:systemd-readahead-replay.service(8)
|
||||
ConditionPathExists=/.readahead
|
||||
|
||||
[Service]
|
||||
Type=oneshot
|
||||
ExecStart=/bin/rm -f /.readahead
|
||||
|
||||
[Install]
|
||||
WantedBy=system-update.target
|
||||
Also=systemd-readahead-collect.service
|
||||
@ -1,26 +0,0 @@
|
||||
# This file is part of systemd.
|
||||
#
|
||||
# systemd is free software; you can redistribute it and/or modify it
|
||||
# under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation; either version 2.1 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
[Unit]
|
||||
Description=Replay Read-Ahead Data
|
||||
Documentation=man:systemd-readahead-replay.service(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
Before=sysinit.target shutdown.target
|
||||
ConditionPathExists=!/run/systemd/readahead/noreplay
|
||||
ConditionPathExists=/.readahead
|
||||
ConditionVirtualization=no
|
||||
|
||||
[Service]
|
||||
Type=notify
|
||||
ExecStart=@rootlibexecdir@/systemd-readahead replay
|
||||
RemainAfterExit=yes
|
||||
StandardOutput=null
|
||||
OOMScoreAdjust=1000
|
||||
|
||||
[Install]
|
||||
WantedBy=default.target
|
||||
@ -11,7 +11,7 @@ Documentation=man:systemd-remount-fs.service(8)
|
||||
Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-fsck-root.service
|
||||
After=systemd-fsck-root.service
|
||||
Before=local-fs-pre.target local-fs.target shutdown.target
|
||||
Wants=local-fs-pre.target
|
||||
ConditionPathExists=/etc/fstab
|
||||
|
||||
@ -11,7 +11,7 @@ Documentation=man:systemd-rfkill@.service(8)
|
||||
DefaultDependencies=no
|
||||
RequiresMountsFor=/var/lib/systemd/rfkill
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service
|
||||
After=systemd-remount-fs.service
|
||||
Before=sysinit.target shutdown.target
|
||||
|
||||
[Service]
|
||||
|
||||
@ -10,7 +10,6 @@ Description=Apply Kernel Variables
|
||||
Documentation=man:systemd-sysctl.service(8) man:sysctl.d(5)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service
|
||||
After=systemd-modules-load.service
|
||||
Before=sysinit.target shutdown.target
|
||||
ConditionPathIsReadWrite=/proc/sys/
|
||||
|
||||
@ -10,7 +10,7 @@ Description=Create System Users
|
||||
Documentation=man:sysusers.d(5) man:systemd-sysusers.service(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service
|
||||
After=systemd-remount-fs.service
|
||||
Before=sysinit.target shutdown.target systemd-update-done.service
|
||||
ConditionNeedsUpdate=/etc
|
||||
|
||||
|
||||
@ -10,7 +10,7 @@ Description=Cleanup of Temporary Directories
|
||||
Documentation=man:tmpfiles.d(5) man:systemd-tmpfiles(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service local-fs.target time-sync.target
|
||||
After=local-fs.target time-sync.target
|
||||
Before=shutdown.target
|
||||
|
||||
[Service]
|
||||
|
||||
@ -10,7 +10,7 @@ Description=Create Static Device Nodes in /dev
|
||||
Documentation=man:tmpfiles.d(5) man:systemd-tmpfiles(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-sysusers.service
|
||||
After=systemd-sysusers.service
|
||||
Before=sysinit.target local-fs-pre.target systemd-udevd.service shutdown.target
|
||||
ConditionCapability=CAP_SYS_MODULE
|
||||
|
||||
|
||||
@ -10,7 +10,7 @@ Description=Create Volatile Files and Directories
|
||||
Documentation=man:tmpfiles.d(5) man:systemd-tmpfiles(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service local-fs.target systemd-sysusers.service
|
||||
After=local-fs.target systemd-sysusers.service
|
||||
Before=sysinit.target shutdown.target
|
||||
RefuseManualStop=yes
|
||||
|
||||
|
||||
@ -10,7 +10,7 @@ Description=Rebuild Hardware Database
|
||||
Documentation=man:udev(7) man:systemd-udevd.service(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service
|
||||
After=systemd-remount-fs.service
|
||||
Before=sysinit.target shutdown.target systemd-update-done.service
|
||||
ConditionNeedsUpdate=/etc
|
||||
|
||||
|
||||
@ -10,7 +10,7 @@ Description=Update is Completed
|
||||
Documentation=man:systemd-update-done.service(8)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service local-fs.target
|
||||
After=local-fs.target
|
||||
Before=sysinit.target shutdown.target
|
||||
ConditionNeedsUpdate=|/etc
|
||||
ConditionNeedsUpdate=|/var
|
||||
|
||||
@ -11,7 +11,7 @@ Documentation=man:systemd-update-utmp.service(8) man:utmp(5)
|
||||
DefaultDependencies=no
|
||||
RequiresMountsFor=/var/log/wtmp
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service systemd-tmpfiles-setup.service auditd.service
|
||||
After=systemd-remount-fs.service systemd-tmpfiles-setup.service auditd.service
|
||||
Before=sysinit.target shutdown.target
|
||||
|
||||
[Service]
|
||||
|
||||
@ -10,7 +10,6 @@ Description=Setup Virtual Console
|
||||
Documentation=man:systemd-vconsole-setup.service(8) man:vconsole.conf(5)
|
||||
DefaultDependencies=no
|
||||
Conflicts=shutdown.target
|
||||
After=systemd-readahead-collect.service systemd-readahead-replay.service
|
||||
Before=sysinit.target shutdown.target
|
||||
ConditionPathExists=/dev/tty0
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user