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-rw-r--r--man/systemd.swap.xml16
-rw-r--r--src/core/dbus-swap.c13
-rw-r--r--src/core/load-fragment-gperf.gperf.m42
-rw-r--r--src/core/swap.c91
-rw-r--r--src/core/swap.h2
-rw-r--r--src/fstab-generator/fstab-generator.c56
6 files changed, 103 insertions, 77 deletions
diff --git a/man/systemd.swap.xml b/man/systemd.swap.xml
index 00fafdce2a..44c16e7bcc 100644
--- a/man/systemd.swap.xml
+++ b/man/systemd.swap.xml
@@ -171,14 +171,14 @@
</varlistentry>
<varlistentry>
- <term><varname>Discard=</varname></term>
-
- <listitem><para>Enable discards, if the swap
- backing device supports the discard or trim
- operation. Can be one of <literal>none</literal>,
- <literal>once</literal>, <literal>pages</literal>
- or <literal>all</literal>. Defaults to
- <literal>none</literal>. (See
+ <term><varname>Options=</varname></term>
+
+ <listitem><para>May contain an option
+ string for the swap device. This may
+ be used for controlling discard
+ options among other functionality, if
+ the swap backing device supports the
+ discard or trim operation. (See
<citerefentry><refentrytitle>swapon</refentrytitle><manvolnum>8</manvolnum></citerefentry>
for more information.)
</para></listitem>
diff --git a/src/core/dbus-swap.c b/src/core/dbus-swap.c
index c854716b48..1e7f66d053 100644
--- a/src/core/dbus-swap.c
+++ b/src/core/dbus-swap.c
@@ -55,7 +55,7 @@ static int property_get_priority(
return sd_bus_message_append(reply, "i", p);
}
-static int property_get_discard(
+static int property_get_options(
sd_bus *bus,
const char *path,
const char *interface,
@@ -65,17 +65,16 @@ static int property_get_discard(
sd_bus_error *error) {
Swap *s = SWAP(userdata);
- const char *p;
+ const char *options = NULL;
assert(bus);
assert(reply);
assert(s);
if (s->from_fragment)
- p = s->parameters_fragment.discard ?: "none";
- else
- p = "none";
- return sd_bus_message_append(reply, "s", p);
+ options = s->parameters_fragment.options;
+
+ return sd_bus_message_append(reply, "s", options);
}
static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, swap_result, SwapResult);
@@ -84,7 +83,7 @@ const sd_bus_vtable bus_swap_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("What", "s", NULL, offsetof(Swap, what), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("Priority", "i", property_get_priority, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
- SD_BUS_PROPERTY("Discard", "s", property_get_discard, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+ SD_BUS_PROPERTY("Options", "s", property_get_options, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("TimeoutUSec", "t", bus_property_get_usec, offsetof(Swap, timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Swap, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Swap, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
diff --git a/src/core/load-fragment-gperf.gperf.m4 b/src/core/load-fragment-gperf.gperf.m4
index 26d40fbc6d..ca0139479b 100644
--- a/src/core/load-fragment-gperf.gperf.m4
+++ b/src/core/load-fragment-gperf.gperf.m4
@@ -299,7 +299,7 @@ Automount.DirectoryMode, config_parse_mode, 0,
m4_dnl
Swap.What, config_parse_path, 0, offsetof(Swap, parameters_fragment.what)
Swap.Priority, config_parse_int, 0, offsetof(Swap, parameters_fragment.priority)
-Swap.Discard, config_parse_string, 0, offsetof(Swap, parameters_fragment.discard)
+Swap.Options, config_parse_string, 0, offsetof(Swap, parameters_fragment.options)
Swap.TimeoutSec, config_parse_sec, 0, offsetof(Swap, timeout_usec)
EXEC_CONTEXT_CONFIG_ITEMS(Swap)m4_dnl
CGROUP_CONTEXT_CONFIG_ITEMS(Swap)m4_dnl
diff --git a/src/core/swap.c b/src/core/swap.c
index b2ca048bcb..1204386cdb 100644
--- a/src/core/swap.c
+++ b/src/core/swap.c
@@ -152,8 +152,8 @@ static void swap_done(Unit *u) {
free(s->parameters_fragment.what);
s->parameters_fragment.what = NULL;
- free(s->parameters_fragment.discard);
- s->parameters_fragment.discard = NULL;
+ free(s->parameters_fragment.options);
+ s->parameters_fragment.options = NULL;
s->exec_runtime = exec_runtime_unref(s->exec_runtime);
exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX);
@@ -608,11 +608,11 @@ static void swap_dump(Unit *u, FILE *f, const char *prefix) {
"%sPriority: %i\n"
"%sNoAuto: %s\n"
"%sNoFail: %s\n"
- "%sDiscard: %s\n",
+ "%sOptions: %s\n",
prefix, p->priority,
prefix, yes_no(p->noauto),
prefix, yes_no(p->nofail),
- prefix, p->discard ?: "none");
+ prefix, strempty(p->options));
if (s->control_pid > 0)
fprintf(f,
@@ -739,9 +739,74 @@ fail:
swap_enter_dead(s, SWAP_FAILURE_RESOURCES);
}
+static int mount_find_pri(const char *options, int *ret) {
+ const char *opt;
+ char *end;
+ unsigned long r;
+
+ assert(ret);
+
+ if (!options)
+ return 0;
+
+ opt = mount_test_option(options, "pri");
+ if (!opt)
+ return 0;
+
+ opt += strlen("pri");
+ if (*opt != '=')
+ return -EINVAL;
+
+ errno = 0;
+ r = strtoul(opt + 1, &end, 10);
+ if (errno > 0)
+ return -errno;
+
+ if (end == opt + 1 || (*end != ',' && *end != 0))
+ return -EINVAL;
+
+ *ret = (int) r;
+ return 1;
+}
+
+static int mount_find_discard(const char *options, char **ret) {
+ const char *opt;
+ char *ans;
+ size_t len;
+
+ assert(ret);
+
+ if (!options)
+ return 0;
+
+ opt = mount_test_option(options, "discard");
+ if (!opt)
+ return 0;
+
+ opt += strlen("discard");
+ if (*opt == ',' || *opt == '\0')
+ ans = strdup("all");
+ else {
+ if (*opt != '=')
+ return -EINVAL;
+
+ len = strcspn(opt + 1, ",");
+ if (len == 0)
+ return -EINVAL;
+
+ ans = strndup(opt + 1, len);
+ }
+
+ if (!ans)
+ return -ENOMEM;
+
+ *ret = ans;
+ return 1;
+}
+
static void swap_enter_activating(Swap *s) {
- int r, priority;
- char *discard;
+ _cleanup_free_ char *discard = NULL;
+ int r, priority = -1;
assert(s);
@@ -749,11 +814,11 @@ static void swap_enter_activating(Swap *s) {
s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE;
if (s->from_fragment) {
+ mount_find_discard(s->parameters_fragment.options, &discard);
+
priority = s->parameters_fragment.priority;
- discard = s->parameters_fragment.discard;
- } else {
- priority = -1;
- discard = NULL;
+ if (priority < 0)
+ mount_find_pri(s->parameters_fragment.options, &priority);
}
r = exec_command_set(s->control_command, "/sbin/swapon", NULL);
@@ -770,9 +835,11 @@ static void swap_enter_activating(Swap *s) {
}
if (discard && !streq(discard, "none")) {
- const char *discard_arg = "--discard";
+ const char *discard_arg;
- if (!streq(discard, "all"))
+ if (streq(discard, "all"))
+ discard_arg = "--discard";
+ else
discard_arg = strappenda("--discard=", discard);
r = exec_command_append(s->control_command, discard_arg, NULL);
diff --git a/src/core/swap.h b/src/core/swap.h
index 3482d651ec..053c8492b2 100644
--- a/src/core/swap.h
+++ b/src/core/swap.h
@@ -63,7 +63,7 @@ typedef enum SwapResult {
typedef struct SwapParameters {
char *what;
- char *discard;
+ char *options;
int priority;
bool noauto:1;
bool nofail:1;
diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c
index 32a8f9bd51..e257c121e5 100644
--- a/src/fstab-generator/fstab-generator.c
+++ b/src/fstab-generator/fstab-generator.c
@@ -47,7 +47,6 @@ static char *arg_usr_what = NULL;
static char *arg_usr_fstype = NULL;
static char *arg_usr_options = NULL;
-
static int mount_find_pri(struct mntent *me, int *ret) {
char *end, *opt;
unsigned long r;
@@ -60,7 +59,6 @@ static int mount_find_pri(struct mntent *me, int *ret) {
return 0;
opt += strlen("pri");
-
if (*opt != '=')
return -EINVAL;
@@ -76,43 +74,9 @@ static int mount_find_pri(struct mntent *me, int *ret) {
return 1;
}
-static int mount_find_discard(struct mntent *me, char **ret) {
- char *opt, *ans;
- size_t len;
-
- assert(me);
- assert(ret);
-
- opt = hasmntopt(me, "discard");
- if (!opt)
- return 0;
-
- opt += strlen("discard");
-
- if (*opt == ',' || *opt == '\0')
- ans = strdup("all");
- else {
- if (*opt != '=')
- return -EINVAL;
-
- len = strcspn(opt + 1, ",");
- if (len == 0)
- return -EINVAL;
-
- ans = strndup(opt + 1, len);
- }
-
- if (!ans)
- return -ENOMEM;
-
- *ret = ans;
- return 1;
-}
-
static int add_swap(const char *what, struct mntent *me) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
- _cleanup_free_ char *discard = NULL;
bool noauto;
int r, pri = -1;
@@ -131,12 +95,6 @@ static int add_swap(const char *what, struct mntent *me) {
return r;
}
- r = mount_find_discard(me, &discard);
- if (r < 0) {
- log_error("Failed to parse discard");
- return r;
- }
-
noauto = !!hasmntopt(me, "noauto");
name = unit_name_from_path(what, ".swap");
@@ -165,16 +123,18 @@ static int add_swap(const char *what, struct mntent *me) {
"What=%s\n",
what);
+ /* Note that we currently pass the priority field twice, once
+ * in Priority=, and once in Options= */
if (pri >= 0)
fprintf(f, "Priority=%i\n", pri);
- if (discard)
- fprintf(f, "Discard=%s\n", discard);
+ if (!isempty(me->mnt_opts) && !streq(me->mnt_opts, "defaults"))
+ fprintf(f, "Options=%s\n", me->mnt_opts);
- fflush(f);
- if (ferror(f)) {
- log_error("Failed to write unit file %s: %m", unit);
- return -errno;
+ r = fflush_and_check(f);
+ if (r < 0) {
+ log_error("Failed to write unit file %s: %s", unit, strerror(-r));
+ return r;
}
/* use what as where, to have a nicer error message */
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-11 12:56:54 +0000