22e3a02b9d
Cache client metadata, in order to be improve runtime behaviour under pressure. This is inspired by @vcaputo's work, specifically: https://github.com/systemd/systemd/pull/2280 That code implements related but different semantics. For a longer explanation what this change implements please have a look at the long source comment this patch adds to journald-context.c. After this commit: # time bash -c 'dd bs=$((1024*1024)) count=$((1*1024)) if=/dev/urandom | systemd-cat' 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 11.2783 s, 95.2 MB/s real 0m11.283s user 0m0.007s sys 0m6.216s Before this commit: # time bash -c 'dd bs=$((1024*1024)) count=$((1*1024)) if=/dev/urandom | systemd-cat' 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 52.0788 s, 20.6 MB/s real 0m52.099s user 0m0.014s sys 0m7.170s As side effect, this corrects the journal's rate limiter feature: we now always use the unit name as key for the ratelimiter.
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
#pragma once
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/***
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This file is part of systemd.
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Copyright 2017 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <inttypes.h>
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#include <sys/types.h>
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#include "sd-id128.h"
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typedef struct ClientContext ClientContext;
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#include "journald-server.h"
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struct ClientContext {
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unsigned n_ref;
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unsigned lru_index;
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usec_t timestamp;
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bool in_lru;
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pid_t pid;
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uid_t uid;
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gid_t gid;
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char *comm;
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char *exe;
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char *cmdline;
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char *capeff;
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uint32_t auditid;
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uid_t loginuid;
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char *cgroup;
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char *session;
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uid_t owner_uid;
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char *unit;
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char *user_unit;
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char *slice;
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char *user_slice;
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sd_id128_t invocation_id;
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char *label;
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size_t label_size;
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};
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int client_context_get(
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Server *s,
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pid_t pid,
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const struct ucred *ucred,
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const char *label, size_t label_len,
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const char *unit_id,
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ClientContext **ret);
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int client_context_acquire(
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Server *s,
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pid_t pid,
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const struct ucred *ucred,
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const char *label, size_t label_len,
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const char *unit_id,
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ClientContext **ret);
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ClientContext* client_context_release(Server *s, ClientContext *c);
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void client_context_maybe_refresh(
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Server *s,
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ClientContext *c,
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const struct ucred *ucred,
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const char *label, size_t label_size,
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const char *unit_id,
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usec_t tstamp);
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void client_context_acquire_default(Server *s);
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void client_context_flush_all(Server *s);
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