forked from pool/systemd
186 lines
5.7 KiB
Diff
186 lines
5.7 KiB
Diff
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From d3acd5b49a6a321dc3b1512416132b8724b2fd20 Mon Sep 17 00:00:00 2001
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From: Franck Bui <fbui@suse.com>
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Date: Tue, 6 Nov 2018 11:51:26 +0100
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Subject: [PATCH] logind: keep backward compatibility with UserTasksMax= in
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logind.conf
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Since commit 284149392755f086d0a71, UserTasksMax= support has been simply
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dropped.
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A generator is used to automatically create an appropriate dropin that has the
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same effect. However since the snippet is generated in /run, sysadmin is
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encouraged to copy it in /etc to make it persistent.
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The main advantages to use a generator are:
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- sysadmin is aware of this backward incompatible change
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- he will be the one who will fix logind.conf manually (to remove the use of
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UserTasksMax=)
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- he will decide how to name the snippet and possibly merge it with an
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existing one
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Expect this generator to be dropped in the future.
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---
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meson.build | 8 ++++
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src/login/compat-tasks-max-generator.c | 66 ++++++++++++++++++++++++++
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src/login/logind-user.c | 43 +++++++++++++++--
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3 files changed, 112 insertions(+), 5 deletions(-)
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create mode 100644 src/login/compat-tasks-max-generator.c
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diff --git a/meson.build b/meson.build
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index 5c7c165ba..7e3e8ca16 100644
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--- a/meson.build
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+++ b/meson.build
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@@ -1701,6 +1701,14 @@ if conf.get('ENABLE_LOGIND') == 1
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endif
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endif
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+executable('logind-compat-tasks-max-generator',
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+ 'src/login/compat-tasks-max-generator.c',
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+ include_directories : includes,
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+ link_with : [libshared, liblogind_core],
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+ install_rpath : rootlibexecdir,
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+ install : true,
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+ install_dir : systemgeneratordir)
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+
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executable('systemd-user-runtime-dir',
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user_runtime_dir_sources,
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include_directories : includes,
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diff --git a/src/login/compat-tasks-max-generator.c b/src/login/compat-tasks-max-generator.c
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new file mode 100644
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index 000000000..404ca5f23
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--- /dev/null
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+++ b/src/login/compat-tasks-max-generator.c
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@@ -0,0 +1,66 @@
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+#include <stdint.h>
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+
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+#include "alloc-util.h"
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+#include "dropin.h"
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+#include "logind.h"
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+#include "path-util.h"
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+
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+static const char *arg_dest = "/tmp";
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+
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+static int read_manager_configuration(uint64_t *user_tasks_max) {
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+ Manager m = {};
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+ int r;
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+
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+ manager_reset_config(&m);
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+ m.user_tasks_max = 0;
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+
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+ r = manager_parse_config_file(&m);
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+ if (r < 0)
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+ return log_warning_errno(r, "Failed to parse logind.conf: %m");
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+
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+ if (m.user_tasks_max == 0)
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+ return 0;
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+
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+ *user_tasks_max = m.user_tasks_max;
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+ return 1;
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+}
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+
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+int main(int argc, char *argv[]) {
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+ _cleanup_free_ char *p = NULL;
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+ uint64_t user_tasks_max;
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+ int r = 0;
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+
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+ if (argc > 1 && argc != 4) {
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+ log_error("This program takes three or no arguments.");
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+ return EXIT_FAILURE;
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+ }
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+
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+ if (argc > 1)
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+ arg_dest = argv[1];
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+
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+ log_set_prohibit_ipc(true);
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+ log_set_target(LOG_TARGET_AUTO);
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+ log_parse_environment();
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+ log_open();
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+
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+ umask(0022);
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+
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+ r = read_manager_configuration(&user_tasks_max);
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+ if (r == 0)
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+ return EXIT_SUCCESS;
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+ if (r < 0)
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+ return EXIT_FAILURE;
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+
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+ p = path_join(arg_dest, "user-.slice.d", "50-limits.conf");
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+ if (!p)
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+ return EXIT_FAILURE;
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+
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+ log_warning("Creating %s to keep compability\n"
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+ "Consider copying the snippet in /etc/systemd/system/user-.slice.d/\n", p);
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+
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+ r = write_drop_in_format(arg_dest, "user-.slice", 50, "limits",
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+ "# Automatically generated by logind-compat-tasks-max-generator\n\n"
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+ "[Slice]\nTasksMax=%" PRIu64, user_tasks_max);
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+
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+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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+}
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diff --git a/src/login/logind-user.c b/src/login/logind-user.c
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index 66f5c896d..fe58b0398 100644
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--- a/src/login/logind-user.c
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+++ b/src/login/logind-user.c
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@@ -743,17 +743,50 @@ int config_parse_compat_user_tasks_max(
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void *data,
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void *userdata) {
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+ uint64_t *m = data;
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+ uint64_t k;
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+ int r;
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+
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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- log_syntax(unit, LOG_NOTICE, filename, line, 0,
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+ log_syntax(unit, LOG_WARNING, filename, line, 0,
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"Support for option %s= has been removed.",
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lvalue);
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- log_info("Hint: try creating /etc/systemd/system/user-.slice.d/50-limits.conf with:\n"
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- " [Slice]\n"
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- " TasksMax=%s",
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- rvalue);
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+
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+ if (isempty(rvalue)) {
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+ *m = system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 100U);
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+ return 0;
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+ }
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+
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+ if (streq(rvalue, "infinity")) {
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+ *m = CGROUP_LIMIT_MAX;
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+ return 0;
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+ }
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+
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+ /* Try to parse as percentage */
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+ r = parse_percent(rvalue);
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+ if (r >= 0)
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+ k = system_tasks_max_scale(r, 100U);
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+ else {
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+
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+ /* If the passed argument was not a percentage, or out of range, parse as byte size */
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+
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+ r = safe_atou64(rvalue, &k);
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+ if (r < 0) {
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+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse tasks maximum, ignoring: %s", rvalue);
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+ return 0;
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+ }
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+ }
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+
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+ if (k <= 0 || k >= UINT64_MAX) {
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+ log_syntax(unit, LOG_ERR, filename, line, 0, "Tasks maximum out of range, ignoring: %s", rvalue);
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+ return 0;
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+ }
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+
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+ *m = k;
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+
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return 0;
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}
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--
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2.19.0
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