mirror of
https://github.com/systemd/systemd.git
synced 2024-11-01 09:21:26 +03:00
The systemd System and Service Manager
24754f3694
Introduce journal_file_check_object(), which does lightweight object sanity checks, and use it in journal_file_move_to_object(), so that we will catch certain corrupted objects in the journal file. This fixes #6447, where we had only partially written out OBJECT_ENTRY (ObjectHeader written, but rest of object zero bytes), causing "journalctl --list-boots" to fail. $ builddir.vanilla/journalctl --list-boots -D bug6447/ Failed to determine boots: No data available $ builddir.patched/journalctl --list-boots -D bug6447/ -52 22633da1c5374a728d6c215e2c301dc2 Mon 2017-07-10 05:29:21 EEST—Mon 2017-07-10 05:31:51 EEST -51 2253aab9ea7e4a2598f2abda82939eff Mon 2017-07-10 05:32:22 EEST—Mon 2017-07-10 05:36:49 EEST -50 ef0d85d35c74486fa4104f9d6391b6ba Mon 2017-07-10 05:40:33 EEST—Mon 2017-07-10 05:40:40 EEST [...] Note that journal_file_check_object() is similar to journal_file_object_verify(). The most expensive checks are omitted, as they would slow down every journal_file_move_to_object() call too much. With this implementation, the added overhead is small, for example when dumping some journal content to /dev/null (built with -Dbuildtype=debugoptimized -Db_ndebug=true): Performance counter stats for 'builddir.vanilla/journalctl -D 76f4d4c3406945f9a60d3ca8763aa754/': 12542,311634 task-clock:u (msec) # 1,000 CPUs utilized 0 context-switches:u # 0,000 K/sec 0 cpu-migrations:u # 0,000 K/sec 80 100 page-faults:u # 0,006 M/sec 41 786 963 456 cycles:u # 3,332 GHz 105 453 864 770 instructions:u # 2,52 insn per cycle 24 342 227 334 branches:u # 1940,809 M/sec 105 709 217 branch-misses:u # 0,43% of all branches 12,545199291 seconds time elapsed Performance counter stats for 'builddir.patched/journalctl -D 76f4d4c3406945f9a60d3ca8763aa754/': 12734,723233 task-clock:u (msec) # 1,000 CPUs utilized 0 context-switches:u # 0,000 K/sec 0 cpu-migrations:u # 0,000 K/sec 80 693 page-faults:u # 0,006 M/sec 42 661 017 429 cycles:u # 3,350 GHz 107 696 985 865 instructions:u # 2,52 insn per cycle 24 950 526 745 branches:u # 1959,252 M/sec 101 762 806 branch-misses:u # 0,41% of all branches 12,737527327 seconds time elapsed Fixes #6447. |
||
|---|---|---|
| .github | ||
| .mkosi | ||
| catalog | ||
| coccinelle | ||
| docs | ||
| factory/etc | ||
| hwdb | ||
| man | ||
| modprobe.d | ||
| network | ||
| po | ||
| rules | ||
| shell-completion | ||
| src | ||
| sysctl.d | ||
| system-preset | ||
| sysusers.d | ||
| test | ||
| tmpfiles.d | ||
| tools | ||
| units | ||
| xorg | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .travis.yml | ||
| .vimrc | ||
| .ycm_extra_conf.py | ||
| CODING_STYLE | ||
| configure | ||
| DISTRO_PORTING | ||
| ENVIRONMENT.md | ||
| HACKING | ||
| LICENSE.GPL2 | ||
| LICENSE.LGPL2.1 | ||
| Makefile | ||
| meson_options.txt | ||
| meson.build | ||
| mkosi.build | ||
| mkosi.default | ||
| NEWS | ||
| README | ||
| README.md | ||
| TODO | ||
systemd - System and Service Manager
Details
General information about systemd can be found in the systemd Wiki.
Information about build requirements are provided in the README file.
Consult our NEWS file for information about what's new in the most recent systemd versions.
Please see the HACKING file for information how to hack on systemd and test your modifications.
Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.
When preparing patches for systemd, please follow our Coding Style Guidelines.
If you are looking for support, please contact our mailing list or join our IRC channel.