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From 99074eebc911728a41167c1962231e11b5e3cddd Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Fri, 6 Nov 2015 11:06:52 +0100
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Subject: [PATCH] core: support IEC suffixes for RLIMIT stuff
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Let's make things more user-friendly and support for example
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LimitAS=16G
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rather than force users to always use LimitAS=16106127360.
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The change is relevant for options:
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[Default]Limit{FSIZE,DATA,STACK,CORE,RSS,AS,MEMLOCK,MSGQUEUE}
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The patch introduces config_parse_bytes_limit(), it's the same as
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config_parse_limit() but uses parse_size() tu support the suffixes.
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Addresses: https://github.com/systemd/systemd/issues/1772
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Cherry-picked from: 412ea7a936ebaa5342a4c2abf48b9e408e6ba5dc
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Related: #1351415
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---
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man/systemd-system.conf.xml | 6 +++--
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man/systemd.exec.xml | 4 +++-
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src/core/load-fragment-gperf.gperf.m4 | 16 ++++++-------
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src/core/load-fragment.c | 43 +++++++++++++++++++++++++++++++++++
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src/core/load-fragment.h | 1 +
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src/core/main.c | 16 ++++++-------
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6 files changed, 67 insertions(+), 19 deletions(-)
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diff --git a/man/systemd-system.conf.xml b/man/systemd-system.conf.xml
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index ca25c93..b7d9cde 100644
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--- a/man/systemd-system.conf.xml
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+++ b/man/systemd-system.conf.xml
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@@ -327,8 +327,10 @@
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resource limits for units. See
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<citerefentry><refentrytitle>setrlimit</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details. Use the string <varname>infinity</varname> to
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- configure no limit on a specific resource. These settings may
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- be overridden in individual units using the corresponding
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+ configure no limit on a specific resource. The multiplicative suffixes
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+ K (=1024), M (=1024*1024) and so on for G, T, P and E may be used for
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+ resource limits measured in bytes (e.g. DefaultLimitAS=16G). These
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+ settings may be overridden in individual units using the corresponding
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LimitXXX= directives. Note that these resource limits are only
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defaults for units, they are not applied to PID 1
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itself.</para></listitem>
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diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
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index 6af7c7a..25aea16 100644
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--- a/man/systemd.exec.xml
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+++ b/man/systemd.exec.xml
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@@ -559,7 +559,9 @@
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of various resources for executed processes. See
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<citerefentry><refentrytitle>setrlimit</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details. Use the string <varname>infinity</varname> to
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- configure no limit on a specific resource.</para></listitem>
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+ configure no limit on a specific resource. The multiplicative suffixes
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+ K (=1024), M (=1024*1024) and so on for G, T, P and E may be used for
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+ resource limits measured in bytes (e.g. LimitAS=16G).</para></listitem>
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<title>Limit directives and their equivalent with ulimit</title>
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diff --git a/src/core/load-fragment-gperf.gperf.m4 b/src/core/load-fragment-gperf.gperf.m4
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index 85d9797..c3461a0 100644
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--- a/src/core/load-fragment-gperf.gperf.m4
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+++ b/src/core/load-fragment-gperf.gperf.m4
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@@ -59,18 +59,18 @@ $1.SystemCallArchitectures, config_parse_warn_compat, DISABLED_CO
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$1.SystemCallErrorNumber, config_parse_warn_compat, DISABLED_CONFIGURATION, 0
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$1.RestrictAddressFamilies, config_parse_warn_compat, DISABLED_CONFIGURATION, 0')
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$1.LimitCPU, config_parse_limit, RLIMIT_CPU, offsetof($1, exec_context.rlimit)
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-$1.LimitFSIZE, config_parse_limit, RLIMIT_FSIZE, offsetof($1, exec_context.rlimit)
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-$1.LimitDATA, config_parse_limit, RLIMIT_DATA, offsetof($1, exec_context.rlimit)
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-$1.LimitSTACK, config_parse_limit, RLIMIT_STACK, offsetof($1, exec_context.rlimit)
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-$1.LimitCORE, config_parse_limit, RLIMIT_CORE, offsetof($1, exec_context.rlimit)
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-$1.LimitRSS, config_parse_limit, RLIMIT_RSS, offsetof($1, exec_context.rlimit)
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+$1.LimitFSIZE, config_parse_bytes_limit, RLIMIT_FSIZE, offsetof($1, exec_context.rlimit)
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+$1.LimitDATA, config_parse_bytes_limit, RLIMIT_DATA, offsetof($1, exec_context.rlimit)
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+$1.LimitSTACK, config_parse_bytes_limit, RLIMIT_STACK, offsetof($1, exec_context.rlimit)
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+$1.LimitCORE, config_parse_bytes_limit, RLIMIT_CORE, offsetof($1, exec_context.rlimit)
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+$1.LimitRSS, config_parse_bytes_limit, RLIMIT_RSS, offsetof($1, exec_context.rlimit)
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$1.LimitNOFILE, config_parse_limit, RLIMIT_NOFILE, offsetof($1, exec_context.rlimit)
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-$1.LimitAS, config_parse_limit, RLIMIT_AS, offsetof($1, exec_context.rlimit)
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+$1.LimitAS, config_parse_bytes_limit, RLIMIT_AS, offsetof($1, exec_context.rlimit)
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$1.LimitNPROC, config_parse_limit, RLIMIT_NPROC, offsetof($1, exec_context.rlimit)
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-$1.LimitMEMLOCK, config_parse_limit, RLIMIT_MEMLOCK, offsetof($1, exec_context.rlimit)
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+$1.LimitMEMLOCK, config_parse_bytes_limit, RLIMIT_MEMLOCK, offsetof($1, exec_context.rlimit)
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$1.LimitLOCKS, config_parse_limit, RLIMIT_LOCKS, offsetof($1, exec_context.rlimit)
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$1.LimitSIGPENDING, config_parse_limit, RLIMIT_SIGPENDING, offsetof($1, exec_context.rlimit)
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-$1.LimitMSGQUEUE, config_parse_limit, RLIMIT_MSGQUEUE, offsetof($1, exec_context.rlimit)
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+$1.LimitMSGQUEUE, config_parse_bytes_limit, RLIMIT_MSGQUEUE, offsetof($1, exec_context.rlimit)
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$1.LimitNICE, config_parse_limit, RLIMIT_NICE, offsetof($1, exec_context.rlimit)
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$1.LimitRTPRIO, config_parse_limit, RLIMIT_RTPRIO, offsetof($1, exec_context.rlimit)
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$1.LimitRTTIME, config_parse_limit, RLIMIT_RTTIME, offsetof($1, exec_context.rlimit)
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diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
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index b188ec9..dbb45b2 100644
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--- a/src/core/load-fragment.c
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+++ b/src/core/load-fragment.c
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@@ -1119,6 +1119,49 @@ int config_parse_limit(const char *unit,
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return 0;
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}
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+int config_parse_bytes_limit(const char *unit,
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+ const char *filename,
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+ unsigned line,
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+ const char *section,
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+ unsigned section_line,
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+ const char *lvalue,
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+ int ltype,
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+ const char *rvalue,
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+ void *data,
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+ void *userdata) {
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+
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+ struct rlimit **rl = data;
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+ uint64_t bytes;
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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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+
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+ rl += ltype;
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+
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+ if (streq(rvalue, "infinity"))
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+ bytes = (uint64_t) RLIM_INFINITY;
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+ else {
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+ int r;
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+
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+ r = parse_size(rvalue, 1024, &bytes);
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+ if (r < 0) {
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+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, 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 (!*rl) {
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+ *rl = new(struct rlimit, 1);
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+ if (!*rl)
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+ return log_oom();
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+ }
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+
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+ (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) bytes;
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+ return 0;
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+}
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+
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#ifdef HAVE_SYSV_COMPAT
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int config_parse_sysv_priority(const char *unit,
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const char *filename,
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diff --git a/src/core/load-fragment.h b/src/core/load-fragment.h
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index ce10d03..2d509d0 100644
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--- a/src/core/load-fragment.h
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+++ b/src/core/load-fragment.h
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@@ -56,6 +56,7 @@ int config_parse_exec_capabilities(const char *unit, const char *filename, unsig
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int config_parse_exec_secure_bits(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
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int config_parse_bounding_set(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
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int config_parse_limit(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
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+int config_parse_bytes_limit(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
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int config_parse_sysv_priority(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
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int config_parse_kill_signal(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
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int config_parse_exec_mount_flags(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
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diff --git a/src/core/main.c b/src/core/main.c
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index 2aec40b..60ea36c 100644
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--- a/src/core/main.c
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+++ b/src/core/main.c
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@@ -655,18 +655,18 @@ static int parse_config_file(void) {
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{ "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
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{ "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
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{ "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
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- { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
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- { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
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- { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
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- { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
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- { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
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+ { "Manager", "DefaultLimitFSIZE", config_parse_bytes_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
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+ { "Manager", "DefaultLimitDATA", config_parse_bytes_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
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+ { "Manager", "DefaultLimitSTACK", config_parse_bytes_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
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+ { "Manager", "DefaultLimitCORE", config_parse_bytes_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
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+ { "Manager", "DefaultLimitRSS", config_parse_bytes_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
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{ "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
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- { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
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+ { "Manager", "DefaultLimitAS", config_parse_bytes_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
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{ "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
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- { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
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+ { "Manager", "DefaultLimitMEMLOCK", config_parse_bytes_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
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{ "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
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{ "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
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- { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
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+ { "Manager", "DefaultLimitMSGQUEUE", config_parse_bytes_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
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{ "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
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{ "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
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{ "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
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