From fff80c5a2aba519d1c58a1bfc7c0fa96b1e4c30c Mon Sep 17 00:00:00 2001 From: Lukas Nykryn Date: Wed, 19 Nov 2014 12:17:19 +0100 Subject: [PATCH] Revert "readahead: wipe out readahead" This reverts commit d6bc8348d5be8576a475ac8ced2b0146e60fb71f. Conflicts: units/systemd-firstboot.service.in Conflicts: man/sd-daemon.xml man/sd-login.xml man/systemd-notify.xml src/notify/notify.c --- Makefile-man.am | 31 ++ Makefile.am | 54 +- configure.ac | 9 + man/sd-daemon.xml | 1 + man/sd-login.xml | 1 + man/sd-readahead.xml | 117 +++++ man/sd_readahead.xml | 178 +++++++ man/systemd-notify.xml | 11 + man/systemd-readahead-replay.service.xml | 203 ++++++++ po/POTFILES.skip | 1 + shell-completion/zsh/_systemd | 3 +- src/cryptsetup/cryptsetup-generator.c | 2 +- src/gpt-auto-generator/gpt-auto-generator.c | 1 + src/notify/notify.c | 20 +- src/readahead/Makefile | 1 + src/readahead/readahead-analyze.c | 146 ++++++ src/readahead/readahead-collect.c | 650 ++++++++++++++++++++++++ src/readahead/readahead-common.c | 398 +++++++++++++++ src/readahead/readahead-common.h | 61 +++ src/readahead/readahead-replay.c | 281 ++++++++++ src/readahead/readahead.c | 163 ++++++ src/readahead/sd-readahead.c | 89 ++++ src/readahead/test-ssd.c | 41 ++ src/systemd/sd-readahead.h | 73 +++ system-preset/90-systemd.preset | 1 + units/.gitignore | 3 + units/ldconfig.service | 2 +- units/quotaon.service.in | 2 +- units/system-update.target | 2 +- units/systemd-backlight@.service.in | 2 +- units/systemd-binfmt.service.in | 2 +- units/systemd-firstboot.service.in | 2 +- units/systemd-fsck-root.service.in | 1 + units/systemd-fsck@.service.in | 2 +- units/systemd-hwdb-update.service.in | 2 +- units/systemd-journal-catalog-update.service.in | 2 +- units/systemd-modules-load.service.in | 1 + units/systemd-quotacheck.service.in | 2 +- units/systemd-random-seed.service.in | 2 +- units/systemd-readahead-collect.service.in | 28 + units/systemd-readahead-done.service.in | 22 + units/systemd-readahead-done.timer | 22 + units/systemd-readahead-drop.service | 19 + units/systemd-readahead-replay.service.in | 26 + units/systemd-remount-fs.service.in | 2 +- units/systemd-rfkill@.service.in | 2 +- units/systemd-sysctl.service.in | 1 + units/systemd-sysusers.service.in | 2 +- units/systemd-tmpfiles-clean.service.in | 2 +- units/systemd-tmpfiles-setup-dev.service.in | 2 +- units/systemd-tmpfiles-setup.service.in | 2 +- units/systemd-update-done.service.in | 2 +- units/systemd-update-utmp.service.in | 2 +- units/systemd-vconsole-setup.service.in | 1 + 54 files changed, 2675 insertions(+), 23 deletions(-) create mode 100644 man/sd-readahead.xml create mode 100644 man/sd_readahead.xml create mode 100644 man/systemd-readahead-replay.service.xml create mode 120000 src/readahead/Makefile create mode 100644 src/readahead/readahead-analyze.c create mode 100644 src/readahead/readahead-collect.c create mode 100644 src/readahead/readahead-common.c create mode 100644 src/readahead/readahead-common.h create mode 100644 src/readahead/readahead-replay.c create mode 100644 src/readahead/readahead.c create mode 100644 src/readahead/sd-readahead.c create mode 100644 src/readahead/test-ssd.c create mode 100644 src/systemd/sd-readahead.h create mode 100644 units/systemd-readahead-collect.service.in create mode 100644 units/systemd-readahead-done.service.in create mode 100644 units/systemd-readahead-done.timer create mode 100644 units/systemd-readahead-drop.service create mode 100644 units/systemd-readahead-replay.service.in diff --git a/Makefile-man.am b/Makefile-man.am index d0fb9aa..ac6f69a 100644 --- a/Makefile-man.am +++ b/Makefile-man.am @@ -1234,6 +1234,34 @@ man/systemd-random-seed.html: man/systemd-random-seed.service.html endif +if ENABLE_READAHEAD +MANPAGES += \ + man/sd-readahead.3 \ + man/sd_readahead.3 \ + man/systemd-readahead-replay.service.8 +MANPAGES_ALIAS += \ + man/systemd-readahead-collect.service.8 \ + man/systemd-readahead-done.service.8 \ + man/systemd-readahead-done.timer.8 \ + man/systemd-readahead.8 +man/systemd-readahead-collect.service.8: man/systemd-readahead-replay.service.8 +man/systemd-readahead-done.service.8: man/systemd-readahead-replay.service.8 +man/systemd-readahead-done.timer.8: man/systemd-readahead-replay.service.8 +man/systemd-readahead.8: man/systemd-readahead-replay.service.8 +man/systemd-readahead-collect.service.html: man/systemd-readahead-replay.service.html + $(html-alias) + +man/systemd-readahead-done.service.html: man/systemd-readahead-replay.service.html + $(html-alias) + +man/systemd-readahead-done.timer.html: man/systemd-readahead-replay.service.html + $(html-alias) + +man/systemd-readahead.html: man/systemd-readahead-replay.service.html + $(html-alias) + +endif + if ENABLE_RESOLVED MANPAGES += \ man/resolved.conf.5 \ @@ -1660,6 +1688,7 @@ EXTRA_DIST += \ man/sd-id128.xml \ man/sd-journal.xml \ man/sd-login.xml \ + man/sd-readahead.xml \ man/sd_booted.xml \ man/sd_bus_creds_get_pid.xml \ man/sd_bus_creds_new_from_pid.xml \ @@ -1707,6 +1736,7 @@ EXTRA_DIST += \ man/sd_machine_get_class.xml \ man/sd_notify.xml \ man/sd_pid_get_session.xml \ + man/sd_readahead.xml \ man/sd_seat_get_active.xml \ man/sd_session_is_active.xml \ man/sd_uid_get_state.xml \ @@ -1766,6 +1796,7 @@ EXTRA_DIST += \ man/systemd-path.xml \ man/systemd-quotacheck.service.xml \ man/systemd-random-seed.service.xml \ + man/systemd-readahead-replay.service.xml \ man/systemd-remount-fs.service.xml \ man/systemd-resolved.service.xml \ man/systemd-rfkill@.service.xml \ diff --git a/Makefile.am b/Makefile.am index 70e4fbc..b0e4b5a 100644 --- a/Makefile.am +++ b/Makefile.am @@ -2603,7 +2603,8 @@ systemctl_LDADD = \ # ------------------------------------------------------------------------------ systemd_notify_SOURCES = \ - src/notify/notify.c + src/notify/notify.c \ + src/readahead/sd-readahead.c systemd_notify_LDADD = \ libsystemd-internal.la \ @@ -4736,6 +4737,57 @@ EXTRA_DIST += \ units/systemd-vconsole-setup.service.in # ------------------------------------------------------------------------------ +if ENABLE_READAHEAD +systemd_readahead_SOURCES = \ + src/readahead/readahead.c \ + src/readahead/readahead-collect.c \ + src/readahead/readahead-replay.c \ + src/readahead/readahead-analyze.c \ + src/readahead/readahead-common.c \ + src/readahead/readahead-common.h + +systemd_readahead_LDADD = \ + libsystemd-internal.la \ + libudev-internal.la \ + libsystemd-shared.la + +dist_doc_DATA += \ + src/readahead/sd-readahead.c \ + src/systemd/sd-readahead.h + +rootlibexec_PROGRAMS += \ + systemd-readahead + +dist_systemunit_DATA += \ + units/systemd-readahead-drop.service \ + units/systemd-readahead-done.timer + +nodist_systemunit_DATA += \ + units/systemd-readahead-collect.service \ + units/systemd-readahead-replay.service \ + units/systemd-readahead-done.service + +manual_tests += \ + test-ssd + +test_ssd_SOURCES = \ + src/readahead/test-ssd.c \ + src/readahead/readahead-common.c \ + src/readahead/readahead-common.h + +test_ssd_LDADD = \ + libsystemd-internal.la \ + libudev-internal.la \ + libsystemd-shared.la + +endif + +EXTRA_DIST += \ + units/systemd-readahead-collect.service.in \ + units/systemd-readahead-replay.service.in \ + units/systemd-readahead-done.service.in + +# ------------------------------------------------------------------------------ if ENABLE_BOOTCHART systemd_bootchart_SOURCES = \ src/bootchart/bootchart.c \ diff --git a/configure.ac b/configure.ac index 3f50887..f701bcf 100644 --- a/configure.ac +++ b/configure.ac @@ -931,6 +931,14 @@ fi AM_CONDITIONAL(ENABLE_VCONSOLE, [test "$have_vconsole" = "yes"]) # ------------------------------------------------------------------------------ +have_readahead=no +AC_ARG_ENABLE(readahead, AS_HELP_STRING([--disable-readahead], [disable readahead tools])) +if test "x$enable_readahead" != "xno"; then + have_readahead=yes +fi +AM_CONDITIONAL(ENABLE_READAHEAD, [test "$have_readahead" = "yes"]) + +# ------------------------------------------------------------------------------ have_bootchart=no AC_ARG_ENABLE(bootchart, AS_HELP_STRING([--disable-bootchart], [disable bootchart tool])) if test "x$enable_bootchart" != "xno"; then @@ -1474,6 +1482,7 @@ AC_MSG_RESULT([ ELFUTILS: ${have_elfutils} binfmt: ${have_binfmt} vconsole: ${have_vconsole} + readahead: ${have_readahead} bootchart: ${have_bootchart} quotacheck: ${have_quotacheck} tmpfiles: ${have_tmpfiles} diff --git a/man/sd-daemon.xml b/man/sd-daemon.xml index b7ba363..b12abe2 100644 --- a/man/sd-daemon.xml +++ b/man/sd-daemon.xml @@ -137,6 +137,7 @@ systemd.service5, systemd.socket5, fprintf3, + sd-readahead3, pkg-config1 diff --git a/man/sd-login.xml b/man/sd-login.xml index 328f711..abcdb99 100644 --- a/man/sd-login.xml +++ b/man/sd-login.xml @@ -128,6 +128,7 @@ sd_get_seats3, sd_login_monitor_new3, sd-daemon3, + sd-readahead3, pkg-config1 diff --git a/man/sd-readahead.xml b/man/sd-readahead.xml new file mode 100644 index 0000000..bcc46b2 --- /dev/null +++ b/man/sd-readahead.xml @@ -0,0 +1,117 @@ + + + + + + + + + sd-readahead + systemd + + + + Developer + Lennart + Poettering + lennart@poettering.net + + + + + + sd-readahead + 3 + + + + sd-readahead + Reference implementation of APIs for + controlling boot-time read-ahead + + + + + #include "sd-readahead.h" + + + + + Description + + sd-readahead.c and + sd-readahead.h provide a + reference implementation for APIs for controlling boot-time + read-ahead, as implemented by the read-ahead subsystem + of the + systemd1 + init system. + + See + sd_readahead3 + for more information about the function + implemented. + + + + Notes + + This interface is provided by the reference + implementation of APIs for controlling boot-time + read-ahead and distributed with the systemd + package. The algorithms it implements are simple, and + can easily be reimplemented in daemons if it is + important to support this interface without using the + reference implementation. See the respective function + man pages for details. + + In addition, for details about the algorithms, + check the liberally licensed reference implementation + sources: + + and + + These APIs are implemented in the reference + implementation's drop-in + sd-readahead.c and + sd-readahead.h files. It is + recommended that applications consuming these APIs copy + the implementation into their source tree, either + verbatim or in excerpts. These interfaces are + currently not available in a dynamic library. + + The functions provided by this interface become + NOPs when -DDISABLE_SYSTEMD is set during + compilation. In addition, if + sd-readhead.c is compiled on + non-Linux systems it becomes NOPs. + + + + See Also + + systemd1, + sd_readahead3, + sd-daemon3 + + + + diff --git a/man/sd_readahead.xml b/man/sd_readahead.xml new file mode 100644 index 0000000..9827299 --- /dev/null +++ b/man/sd_readahead.xml @@ -0,0 +1,178 @@ + + + + + + + + + sd_readahead + systemd + + + + Developer + Lennart + Poettering + lennart@poettering.net + + + + + + sd_readahead + 3 + + + + sd_readahead + Control ongoing disk boot-time read-ahead operations + + + + + #include "sd-readahead.h" + + + int sd_readahead + const char *action + + + + + + Description + sd_readahead() may be + called by programs involved with early boot-up to + control ongoing boot-time disk read-ahead operations. It may be + used to terminate read-ahead operations in case an + uncommon disk access pattern is to be expected and + hence read-ahead replay or collection is unlikely to + have the desired speed-up effect on the current or + future boot-ups. + + The action should be one + of the following strings: + + + + cancel + + Terminates read-ahead + data collection, and drops all + read-ahead data collected during this + boot-up. + + + + done + + Terminates read-ahead + data collection, but keeps all + read-ahead data collected during this + boot-up around for use during + subsequent boot-ups. + + + + noreplay + + Terminates read-ahead + replay. + + + + + + + + Return Value + + On failure, these calls return a negative + errno-style error code. It is generally recommended to + ignore the return value of this call. + + + + Notes + + 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. + + Internally, this function creates a file in + /run/systemd/readahead/ which is + then used as flag file to notify the read-ahead + subsystem. + + For details about the algorithm check the + liberally licensed reference implementation sources: + + and + + sd_readahead() is + implemented in the reference implementation's drop-in + sd-readahead.c and + sd-readahead.h files. It is + recommended that applications consuming this API copy + the implementation into their source tree. For more + details about the reference implementation, see + sd-readahead3 + + If -DDISABLE_SYSTEMD is set during compilation, + this function will always return 0 and otherwise + become a NOP. + + + + Examples + + + Cancelling all read-ahead operations + + 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. + + + sd_readahead("cancel"); +sd_readahead("noreplay"); + + + + + + See Also + + systemd1, + sd-readahead3, + daemon7 + + + + diff --git a/man/systemd-notify.xml b/man/systemd-notify.xml index 06d5ae5..46ede1a 100644 --- a/man/systemd-notify.xml +++ b/man/systemd-notify.xml @@ -127,6 +127,17 @@ sd_booted3. + + + + 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 + sd_readahead3. + + diff --git a/man/systemd-readahead-replay.service.xml b/man/systemd-readahead-replay.service.xml new file mode 100644 index 0000000..669fe78 --- /dev/null +++ b/man/systemd-readahead-replay.service.xml @@ -0,0 +1,203 @@ + + + + + + + + + systemd-readahead-replay.service + systemd + + + + Developer + Lennart + Poettering + lennart@poettering.net + + + + + + systemd-readahead-replay.service + 8 + + + + systemd-readahead-replay.service + systemd-readahead-collect.service + systemd-readahead-done.service + systemd-readahead-done.timer + systemd-readahead + Disk read ahead logic + + + + systemd-readahead-replay.service + systemd-readahead-collect.service + systemd-readahead-done.service + systemd-readahead-done.timer + + /usr/lib/systemd/systemd-readahead/systemd-readahead + OPTIONS + COMMAND + DIRECTORY | FILE + + + + + Description + + systemd-readahead-collect.service + is a service that collects disk usage patterns at boot + time. systemd-readahead-replay.service + 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. + + systemd-readahead-done.service + is executed a short while after boot completed and signals + systemd-readahead-collect.service + to end data collection. On this signal, this service + will then sort the collected disk accesses and store + information about them in + /.readahead. + + Normally, both + systemd-readahead-collect.service + and + systemd-readahead-replay.service + 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 + systemd-readahead-collect.service. + + On rotating media, when replaying disk accesses + at early boot, + systemd-readahead-replay.service + 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, + systemd-readahead-collect.service + will also defragment and rearrange files on disk to + optimize subsequent boot times. + + + + Options + + systemd-readahead understands + the following options: + + + + + + Maximum number of + files to read ahead. Only valid + for thes collect + command. + + + + + + Maximum size of files + in bytes to read ahead. Only valid + for the collect + and replay + commands. + + + + + + Maximum time in microseconds + to spend collecting data. Only valid + for the collect + command. + + + + + + + + + + Commands + + The following commands are understood by + systemd-readahead: + + collect + [DIRECTORY] + + 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. + + + + + replay + [DIRECTORY] + + Perform read-ahead on the + specified directory tree. + + + + + analyze + [FILE] + + 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 replay + command. + + + + + + + + See Also + + systemd1 + + + + diff --git a/po/POTFILES.skip b/po/POTFILES.skip index 51254ec..b552029 100644 --- a/po/POTFILES.skip +++ b/po/POTFILES.skip @@ -17,5 +17,6 @@ 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 diff --git a/shell-completion/zsh/_systemd b/shell-completion/zsh/_systemd index 58b1c7b..06f03bd 100644 --- a/shell-completion/zsh/_systemd +++ b/shell-completion/zsh/_systemd @@ -63,7 +63,8 @@ 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]' + '--booted[Returns 0 if the system was booted up with systemd]' \ + '--readahead=[Controls disk read-ahead operations]:arguments:(cancel done noreply)' ;; systemd-tty-ask-password-agent) _arguments \ diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c index 05061c0..dfbca87 100644 --- a/src/cryptsetup/cryptsetup-generator.c +++ b/src/cryptsetup/cryptsetup-generator.c @@ -111,7 +111,7 @@ static int create_disk( "Conflicts=umount.target\n" "BindsTo=dev-mapper-%i.device\n" "IgnoreOnIsolate=true\n" - "After=cryptsetup-pre.target\n", + "After=systemd-readahead-collect.service systemd-readahead-replay.service cryptsetup-pre.target\n", f); if (!nofail) diff --git a/src/gpt-auto-generator/gpt-auto-generator.c b/src/gpt-auto-generator/gpt-auto-generator.c index 5c58b58..7d5a6c6 100644 --- a/src/gpt-auto-generator/gpt-auto-generator.c +++ b/src/gpt-auto-generator/gpt-auto-generator.c @@ -133,6 +133,7 @@ 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" diff --git a/src/notify/notify.c b/src/notify/notify.c index f98075d..e4a128b 100644 --- a/src/notify/notify.c +++ b/src/notify/notify.c @@ -31,6 +31,7 @@ #include "strv.h" #include "util.h" #include "log.h" +#include "sd-readahead.h" #include "build.h" #include "env-util.h" @@ -38,6 +39,7 @@ 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" @@ -48,6 +50,7 @@ static void help(void) { " --pid[=PID] Set main pid of daemon\n" " --status=TEXT Set status text\n" " --booted Check if the system was booted up with systemd\n", + " --readahead=ACTION Controls read-ahead operations\n", program_invocation_short_name); } @@ -59,6 +62,7 @@ static int parse_argv(int argc, char *argv[]) { ARG_PID, ARG_STATUS, ARG_BOOTED, + ARG_READAHEAD }; static const struct option options[] = { @@ -68,6 +72,7 @@ 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 }, {} }; @@ -113,6 +118,10 @@ static int parse_argv(int argc, char *argv[]) { arg_booted = true; break; + case ARG_READAHEAD: + arg_readahead = optarg; + break; + case '?': return -EINVAL; @@ -125,7 +134,8 @@ static int parse_argv(int argc, char *argv[]) { !arg_ready && !arg_status && !arg_pid && - !arg_booted) { + !arg_booted && + !arg_readahead) { help(); return -EINVAL; } @@ -150,6 +160,14 @@ 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"; diff --git a/src/readahead/Makefile b/src/readahead/Makefile new file mode 120000 index 0000000..d0b0e8e --- /dev/null +++ b/src/readahead/Makefile @@ -0,0 +1 @@ +../Makefile \ No newline at end of file diff --git a/src/readahead/readahead-analyze.c b/src/readahead/readahead-analyze.c new file mode 100644 index 0000000..76db3cb --- /dev/null +++ b/src/readahead/readahead-analyze.c @@ -0,0 +1,146 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2012 Auke Kok + + 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 . +***/ + + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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; +} diff --git a/src/readahead/readahead-collect.c b/src/readahead/readahead-collect.c new file mode 100644 index 0000000..822a803 --- /dev/null +++ b/src/readahead/readahead-collect.c @@ -0,0 +1,650 @@ +/*-*- 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 . +***/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef HAVE_LINUX_BTRFS_H +#include +#endif + +#ifdef HAVE_FANOTIFY_INIT +#include +#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; +} diff --git a/src/readahead/readahead-common.c b/src/readahead/readahead-common.c new file mode 100644 index 0000000..3ca48a7 --- /dev/null +++ b/src/readahead/readahead-common.c @@ -0,0 +1,398 @@ +/*-*- 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 . +***/ + +#include +#include +#include +#include +#include +#include +#include +#include + +#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; +} diff --git a/src/readahead/readahead-common.h b/src/readahead/readahead-common.h new file mode 100644 index 0000000..b34f3aa --- /dev/null +++ b/src/readahead/readahead-common.h @@ -0,0 +1,61 @@ +/*-*- 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 . +***/ + +#include +#include + +#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); diff --git a/src/readahead/readahead-replay.c b/src/readahead/readahead-replay.c new file mode 100644 index 0000000..f81e0fe --- /dev/null +++ b/src/readahead/readahead-replay.c @@ -0,0 +1,281 @@ +/*-*- 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 . +***/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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; +} diff --git a/src/readahead/readahead.c b/src/readahead/readahead.c new file mode 100644 index 0000000..35176e9 --- /dev/null +++ b/src/readahead/readahead.c @@ -0,0 +1,163 @@ +/*-*- 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 . +***/ + +#include +#include +#include +#include +#include +#include +#include + +#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; +} diff --git a/src/readahead/sd-readahead.c b/src/readahead/sd-readahead.c new file mode 100644 index 0000000..675d82c --- /dev/null +++ b/src/readahead/sd-readahead.c @@ -0,0 +1,89 @@ +/*-*- 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 +#include +#include +#include +#include +#include + +#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; +} diff --git a/src/readahead/test-ssd.c b/src/readahead/test-ssd.c new file mode 100644 index 0000000..808faf3 --- /dev/null +++ b/src/readahead/test-ssd.c @@ -0,0 +1,41 @@ +/*-*- 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 . +***/ + +#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; +} diff --git a/src/systemd/sd-readahead.h b/src/systemd/sd-readahead.h new file mode 100644 index 0000000..bb30f9a --- /dev/null +++ b/src/systemd/sd-readahead.h @@ -0,0 +1,73 @@ +/*-*- 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 diff --git a/system-preset/90-systemd.preset b/system-preset/90-systemd.preset index ee1b864..24963f0 100644 --- a/system-preset/90-systemd.preset +++ b/system-preset/90-systemd.preset @@ -12,6 +12,7 @@ enable remote-fs.target enable machines.target enable getty@.service +enable systemd-readahead-* enable systemd-timesyncd.service enable systemd-networkd.service enable systemd-resolved.service diff --git a/units/.gitignore b/units/.gitignore index 6fdb629..638a7ab 100644 --- a/units/.gitignore +++ b/units/.gitignore @@ -52,6 +52,9 @@ /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 diff --git a/units/ldconfig.service b/units/ldconfig.service index f9691e2..43c145b 100644 --- a/units/ldconfig.service +++ b/units/ldconfig.service @@ -10,7 +10,7 @@ Description=Rebuild Dynamic Linker Cache Documentation=man:ldconfig(8) DefaultDependencies=no Conflicts=shutdown.target -After=systemd-remount-fs.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service Before=sysinit.target shutdown.target systemd-update-done.service ConditionNeedsUpdate=/etc diff --git a/units/quotaon.service.in b/units/quotaon.service.in index 7d59a40..49a50a7 100644 --- a/units/quotaon.service.in +++ b/units/quotaon.service.in @@ -9,7 +9,7 @@ Description=Enable File System Quotas Documentation=man:quotaon(8) DefaultDependencies=no -After=systemd-quotacheck.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-quotacheck.service Before=local-fs.target shutdown.target ConditionPathExists=@QUOTAON@ diff --git a/units/system-update.target b/units/system-update.target index 48d46fc..d0f847f 100644 --- a/units/system-update.target +++ b/units/system-update.target @@ -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 +Conflicts=shutdown.target systemd-readahead-collect.service systemd-readahead-replay.service After=sysinit.target Before=shutdown.target AllowIsolate=yes diff --git a/units/systemd-backlight@.service.in b/units/systemd-backlight@.service.in index 5e6706c..b146e30 100644 --- a/units/systemd-backlight@.service.in +++ b/units/systemd-backlight@.service.in @@ -11,7 +11,7 @@ Documentation=man:systemd-backlight@.service(8) DefaultDependencies=no RequiresMountsFor=/var/lib/systemd/backlight Conflicts=shutdown.target -After=systemd-remount-fs.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service Before=sysinit.target shutdown.target [Service] diff --git a/units/systemd-binfmt.service.in b/units/systemd-binfmt.service.in index 34a5d52..02dfe77 100644 --- a/units/systemd-binfmt.service.in +++ b/units/systemd-binfmt.service.in @@ -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=proc-sys-fs-binfmt_misc.automount +After=systemd-readahead-collect.service systemd-readahead-replay.service proc-sys-fs-binfmt_misc.automount Before=sysinit.target shutdown.target ConditionPathIsReadWrite=/proc/sys/ ConditionDirectoryNotEmpty=|/lib/binfmt.d diff --git a/units/systemd-firstboot.service.in b/units/systemd-firstboot.service.in index 405c6f3..89fa7e1 100644 --- a/units/systemd-firstboot.service.in +++ b/units/systemd-firstboot.service.in @@ -10,7 +10,7 @@ Description=First Boot Wizard Documentation=man:systemd-firstboot(1) DefaultDependencies=no Conflicts=shutdown.target -After=systemd-remount-fs.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service Before=systemd-sysusers.service sysinit.target shutdown.target ConditionPathIsReadWrite=/etc ConditionFirstBoot=yes diff --git a/units/systemd-fsck-root.service.in b/units/systemd-fsck-root.service.in index 6d76578..26cce51 100644 --- a/units/systemd-fsck-root.service.in +++ b/units/systemd-fsck-root.service.in @@ -9,6 +9,7 @@ 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=!/ diff --git a/units/systemd-fsck@.service.in b/units/systemd-fsck@.service.in index 857e625..d2cda6a 100644 --- a/units/systemd-fsck@.service.in +++ b/units/systemd-fsck@.service.in @@ -10,7 +10,7 @@ Description=File System Check on %f Documentation=man:systemd-fsck@.service(8) DefaultDependencies=no BindsTo=%i.device -After=%i.device systemd-fsck-root.service local-fs-pre.target +After=systemd-readahead-collect.service systemd-readahead-replay.service %i.device systemd-fsck-root.service local-fs-pre.target Before=shutdown.target [Service] diff --git a/units/systemd-hwdb-update.service.in b/units/systemd-hwdb-update.service.in index 791528e..4bed482 100644 --- a/units/systemd-hwdb-update.service.in +++ b/units/systemd-hwdb-update.service.in @@ -10,7 +10,7 @@ Description=Rebuild Hardware Database Documentation=man:hwdb(7) man:systemd-hwdb(8) DefaultDependencies=no Conflicts=shutdown.target -After=systemd-remount-fs.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service Before=sysinit.target shutdown.target systemd-update-done.service ConditionNeedsUpdate=/etc ConditionPathExists=|!@udevlibexecdir@/hwdb.bin diff --git a/units/systemd-journal-catalog-update.service.in b/units/systemd-journal-catalog-update.service.in index 6370dd4..5b85889 100644 --- a/units/systemd-journal-catalog-update.service.in +++ b/units/systemd-journal-catalog-update.service.in @@ -10,7 +10,7 @@ Description=Rebuild Journal Catalog Documentation=man:systemd-journald.service(8) man:journald.conf(5) DefaultDependencies=no Conflicts=shutdown.target -After=local-fs.target +After=systemd-readahead-collect.service systemd-readahead-replay.service local-fs.target Before=sysinit.target shutdown.target systemd-update-done.service ConditionNeedsUpdate=/etc diff --git a/units/systemd-modules-load.service.in b/units/systemd-modules-load.service.in index 040a0fe..32deb52 100644 --- a/units/systemd-modules-load.service.in +++ b/units/systemd-modules-load.service.in @@ -10,6 +10,7 @@ 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 diff --git a/units/systemd-quotacheck.service.in b/units/systemd-quotacheck.service.in index 5cb9bc3..f726ea1 100644 --- a/units/systemd-quotacheck.service.in +++ b/units/systemd-quotacheck.service.in @@ -9,7 +9,7 @@ Description=File System Quota Check Documentation=man:systemd-quotacheck.service(8) DefaultDependencies=no -After=systemd-remount-fs.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service Before=local-fs.target shutdown.target ConditionPathExists=@QUOTACHECK@ diff --git a/units/systemd-random-seed.service.in b/units/systemd-random-seed.service.in index b55844b..1879b2f 100644 --- a/units/systemd-random-seed.service.in +++ b/units/systemd-random-seed.service.in @@ -11,7 +11,7 @@ Documentation=man:systemd-random-seed.service(8) man:random(4) DefaultDependencies=no RequiresMountsFor=@RANDOM_SEED@ Conflicts=shutdown.target -After=systemd-remount-fs.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service Before=sysinit.target shutdown.target [Service] diff --git a/units/systemd-readahead-collect.service.in b/units/systemd-readahead-collect.service.in new file mode 100644 index 0000000..d4b8e67 --- /dev/null +++ b/units/systemd-readahead-collect.service.in @@ -0,0 +1,28 @@ +# 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 diff --git a/units/systemd-readahead-done.service.in b/units/systemd-readahead-done.service.in new file mode 100644 index 0000000..e0d9579 --- /dev/null +++ b/units/systemd-readahead-done.service.in @@ -0,0 +1,22 @@ +# 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 diff --git a/units/systemd-readahead-done.timer b/units/systemd-readahead-done.timer new file mode 100644 index 0000000..c58e096 --- /dev/null +++ b/units/systemd-readahead-done.timer @@ -0,0 +1,22 @@ +# 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 diff --git a/units/systemd-readahead-drop.service b/units/systemd-readahead-drop.service new file mode 100644 index 0000000..d9d12bc --- /dev/null +++ b/units/systemd-readahead-drop.service @@ -0,0 +1,19 @@ +# 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 diff --git a/units/systemd-readahead-replay.service.in b/units/systemd-readahead-replay.service.in new file mode 100644 index 0000000..c64a533 --- /dev/null +++ b/units/systemd-readahead-replay.service.in @@ -0,0 +1,26 @@ +# 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 diff --git a/units/systemd-remount-fs.service.in b/units/systemd-remount-fs.service.in index 8d9daac..70e1a86 100644 --- a/units/systemd-remount-fs.service.in +++ b/units/systemd-remount-fs.service.in @@ -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-fsck-root.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-fsck-root.service Before=local-fs-pre.target local-fs.target shutdown.target Wants=local-fs-pre.target ConditionPathExists=/etc/fstab diff --git a/units/systemd-rfkill@.service.in b/units/systemd-rfkill@.service.in index b48efe5..0d2757d 100644 --- a/units/systemd-rfkill@.service.in +++ b/units/systemd-rfkill@.service.in @@ -12,7 +12,7 @@ DefaultDependencies=no BindsTo=sys-subsystem-rfkill-devices-%i.device RequiresMountsFor=/var/lib/systemd/rfkill Conflicts=shutdown.target -After=systemd-remount-fs.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service Before=sysinit.target shutdown.target [Service] diff --git a/units/systemd-sysctl.service.in b/units/systemd-sysctl.service.in index fa72085..ade9dc3 100644 --- a/units/systemd-sysctl.service.in +++ b/units/systemd-sysctl.service.in @@ -10,6 +10,7 @@ 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/ diff --git a/units/systemd-sysusers.service.in b/units/systemd-sysusers.service.in index ffd6d77..69fea11 100644 --- a/units/systemd-sysusers.service.in +++ b/units/systemd-sysusers.service.in @@ -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-remount-fs.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service Before=sysinit.target shutdown.target systemd-update-done.service ConditionNeedsUpdate=/etc diff --git a/units/systemd-tmpfiles-clean.service.in b/units/systemd-tmpfiles-clean.service.in index 133c8c9..31b2378 100644 --- a/units/systemd-tmpfiles-clean.service.in +++ b/units/systemd-tmpfiles-clean.service.in @@ -10,7 +10,7 @@ Description=Cleanup of Temporary Directories Documentation=man:tmpfiles.d(5) man:systemd-tmpfiles(8) DefaultDependencies=no Conflicts=shutdown.target -After=local-fs.target time-sync.target +After=systemd-readahead-collect.service systemd-readahead-replay.service local-fs.target time-sync.target Before=shutdown.target [Service] diff --git a/units/systemd-tmpfiles-setup-dev.service.in b/units/systemd-tmpfiles-setup-dev.service.in index 0123a03..0b66c53 100644 --- a/units/systemd-tmpfiles-setup-dev.service.in +++ b/units/systemd-tmpfiles-setup-dev.service.in @@ -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-sysusers.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-sysusers.service Before=sysinit.target local-fs-pre.target systemd-udevd.service shutdown.target ConditionCapability=CAP_SYS_MODULE diff --git a/units/systemd-tmpfiles-setup.service.in b/units/systemd-tmpfiles-setup.service.in index e895cda..72ab083 100644 --- a/units/systemd-tmpfiles-setup.service.in +++ b/units/systemd-tmpfiles-setup.service.in @@ -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=local-fs.target systemd-sysusers.service +After=systemd-readahead-collect.service systemd-readahead-replay.service local-fs.target systemd-sysusers.service Before=sysinit.target shutdown.target RefuseManualStop=yes diff --git a/units/systemd-update-done.service.in b/units/systemd-update-done.service.in index ec7d906..7031bff 100644 --- a/units/systemd-update-done.service.in +++ b/units/systemd-update-done.service.in @@ -10,7 +10,7 @@ Description=Update is Completed Documentation=man:systemd-update-done.service(8) DefaultDependencies=no Conflicts=shutdown.target -After=local-fs.target +After=systemd-readahead-collect.service systemd-readahead-replay.service local-fs.target Before=sysinit.target shutdown.target ConditionNeedsUpdate=|/etc ConditionNeedsUpdate=|/var diff --git a/units/systemd-update-utmp.service.in b/units/systemd-update-utmp.service.in index 163eccd..da7dda7 100644 --- a/units/systemd-update-utmp.service.in +++ b/units/systemd-update-utmp.service.in @@ -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-remount-fs.service systemd-tmpfiles-setup.service auditd.service +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service systemd-tmpfiles-setup.service auditd.service Before=sysinit.target shutdown.target [Service] diff --git a/units/systemd-vconsole-setup.service.in b/units/systemd-vconsole-setup.service.in index 6160361..18faa63 100644 --- a/units/systemd-vconsole-setup.service.in +++ b/units/systemd-vconsole-setup.service.in @@ -10,6 +10,7 @@ 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