TODO

@@ -30,6 +30,9 @@ Before v244:
 
 Features:
 
+* localed: if UTC is selected but timezone file for it doesn't exist, delete
+  /etc/localtime instead of creating a symlink
+
 * socket units: allow creating a udev monitor socket with ListenDevices= or so,
   with matches, then actviate app thorugh that passing socket oveer
 
@@ -37,8 +40,6 @@ Features:
   may be used to mark a whole binary as non-coredumpable. Would fix:
   https://bugs.freedesktop.org/show_bug.cgi?id=69447
 
-* teach parse_timestamp() timezones like the calendar spec already knows it
-
 * beef up hibernation to optionally do swapon/swapoff immediately before/after
   the hibernation
 

man/resolved.conf.xml

@@ -210,9 +210,8 @@
         send for setting up an encrypted connection, and thus results
         in a small DNS look-up time penalty.</para>
 
-        <para>Note that in <literal>opportunistic</literal> mode the
-        resolver is not capable of authenticating the server, so it is
-        vulnerable to "man-in-the-middle" attacks.</para>
+        <para>Note as the resolver is not capable of authenticating
+        the server, it is vulnerable for "man-in-the-middle" attacks.</para>
 
         <para>In addition to this global DNSOverTLS setting
         <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>

man/systemd-analyze.xml

@@ -778,13 +778,6 @@ Service b@0.service not loaded, b.socket cannot be started.
         iterations the specified calendar expression will elapse next. Defaults to 1.</para></listitem>
       </varlistentry>
 
-      <varlistentry>
-        <term><option>--base-time=<replaceable>TIMESTAMP</replaceable></option></term>
-
-        <listitem><para>When used with the <command>calendar</command> command, show next iterations relative
-        to the specified point in time. If not specified defaults to the current time.</para></listitem>
-      </varlistentry>
-
       <xi:include href="user-system-options.xml" xpointer="host" />
       <xi:include href="user-system-options.xml" xpointer="machine" />
 

man/systemd-run.xml

@@ -399,13 +399,8 @@
   <refsect1>
     <title>Exit status</title>
 
-    <para>On success, 0 is returned. If <command>systemd-run</command> failed to start the service, a
-    non-zero return value will be returned. If <command>systemd-run</command> waits for the service to
-    terminate, the return value will be propagated from the service. 0 will be returned on success, including
-    all the cases where systemd considers a service to have exited cleanly, see the discussion of
-    <varname>SuccessExitStatus=</varname> in
-    <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
-    </para>
+    <para>On success, 0 is returned, a non-zero failure
+    code otherwise.</para>
   </refsect1>
 
   <refsect1>
@@ -508,16 +503,6 @@ There is a screen on:
 
       <programlisting>$ loginctl enable-linger</programlisting>
     </example>
-
-    <example>
-      <title>Return value</title>
-
-      <programlisting>$ systemd-run --user --wait true
-$ systemd-run --user --wait -p SuccessExitStatus=11 bash -c 'exit 11'
-$ systemd-run --user --wait -p SuccessExitStatus=SIGUSR1 bash -c 'kill -SIGUSR1 $$$$'</programlisting>
-
-      <para>Those three invocations will succeed, i.e. terminate with an exit code of 0.</para>
-    </example>
   </refsect1>
 
   <refsect1>

src/analyze/analyze-verify.c

@@ -271,13 +271,10 @@ int verify_units(char **filenames, UnitFileScope scope, bool check_man, bool run
                 }
 
                 k = manager_load_startable_unit_or_warn(m, NULL, prepared, &units[count]);
-                if (k < 0) {
-                        if (r == 0)
-                                r = k;
-                        continue;
-                }
-
-                count++;
+                if (k < 0 && r == 0)
+                        r = k;
+                else
+                        count++;
         }
 
         for (i = 0; i < count; i++) {

src/analyze/analyze.c

@@ -84,7 +84,6 @@ static bool arg_man = true;
 static bool arg_generators = false;
 static const char *arg_root = NULL;
 static unsigned arg_iterations = 1;
-static usec_t arg_base_time = USEC_INFINITY;
 
 STATIC_DESTRUCTOR_REGISTER(arg_dot_from_patterns, strv_freep);
 STATIC_DESTRUCTOR_REGISTER(arg_dot_to_patterns, strv_freep);
@@ -2137,10 +2136,7 @@ static int test_calendar(int argc, char *argv[], void *userdata) {
         char **p;
         usec_t n;
 
-        if (arg_base_time != USEC_INFINITY)
-                n = arg_base_time;
-        else
-                n = now(CLOCK_REALTIME); /* We want to use the same "base" for all expressions */
+        n = now(CLOCK_REALTIME); /* We want to use the same "base" for all expressions */
 
         STRV_FOREACH(p, strv_skip(argv, 1)) {
                 r = test_calendar_one(n, *p);
@@ -2262,7 +2258,6 @@ static int help(int argc, char *argv[], void *userdata) {
                "     --man[=BOOL]          Do [not] check for existence of man pages\n"
                "     --generators[=BOOL]   Do [not] run unit generators (requires privileges)\n"
                "     --iterations=N        Show the specified number of iterations\n"
-               "     --base-time=TIMESTAMP Calculate calendar times relative to specified time\n"
                "\nCommands:\n"
                "  time                     Print time spent in the kernel\n"
                "  blame                    Print list of running units ordered by time to init\n"
@@ -2312,7 +2307,6 @@ static int parse_argv(int argc, char *argv[]) {
                 ARG_MAN,
                 ARG_GENERATORS,
                 ARG_ITERATIONS,
-                ARG_BASE_TIME,
         };
 
         static const struct option options[] = {
@@ -2333,7 +2327,6 @@ static int parse_argv(int argc, char *argv[]) {
                 { "host",         required_argument, NULL, 'H'                  },
                 { "machine",      required_argument, NULL, 'M'                  },
                 { "iterations",   required_argument, NULL, ARG_ITERATIONS       },
-                { "base-time",    required_argument, NULL, ARG_BASE_TIME        },
                 {}
         };
 
@@ -2440,13 +2433,6 @@ static int parse_argv(int argc, char *argv[]) {
 
                         break;
 
-                case ARG_BASE_TIME:
-                        r = parse_timestamp(optarg, &arg_base_time);
-                        if (r < 0)
-                                return log_error_errno(r, "Failed to parse --base-time= parameter: %s", optarg);
-
-                        break;
-
                 case '?':
                         return -EINVAL;
 
@@ -2486,6 +2472,7 @@ static int run(int argc, char *argv[]) {
                 { "get-log-level",     VERB_ANY, 1,        0,            get_log_level          },
                 { "set-log-target",    2,        2,        0,            set_log_target         },
                 { "get-log-target",    VERB_ANY, 1,        0,            get_log_target         },
+
                 { "dump",              VERB_ANY, 1,        0,            dump                   },
                 { "cat-config",        2,        VERB_ANY, 0,            cat_config             },
                 { "unit-files",        VERB_ANY, VERB_ANY, 0,            do_unit_files          },

src/basic/time-util.c

@@ -1391,22 +1391,13 @@ bool clock_supported(clockid_t clock) {
         }
 }
 
-int get_timezone(char **ret) {
+int get_timezone(char **tz) {
         _cleanup_free_ char *t = NULL;
         const char *e;
         char *z;
         int r;
 
         r = readlink_malloc("/etc/localtime", &t);
-        if (r == -ENOENT) {
-                /* If the symlink does not exist, assume "UTC", like glibc does*/
-                z = strdup("UTC");
-                if (!z)
-                        return -ENOMEM;
-
-                *ret = z;
-                return 0;
-        }
         if (r < 0)
                 return r; /* returns EINVAL if not a symlink */
 
@@ -1421,7 +1412,7 @@ int get_timezone(char **ret) {
         if (!z)
                 return -ENOMEM;
 
-        *ret = z;
+        *tz = z;
         return 0;
 }
 

src/core/bpf-devices.c

@@ -1,17 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
-
-#include <fnmatch.h>
 #include <linux/bpf_insn.h>
 
 #include "bpf-devices.h"
 #include "bpf-program.h"
-#include "fd-util.h"
-#include "fileio.h"
-#include "nulstr-util.h"
-#include "parse-util.h"
-#include "stat-util.h"
-#include "stdio-util.h"
-#include "string-util.h"
 
 #define PASS_JUMP_OFF 4096
 
@@ -38,117 +29,92 @@ static int bpf_access_type(const char *acc) {
         return r;
 }
 
-static int bpf_prog_whitelist_device(BPFProgram *prog, char type, int major, int minor, const char *acc) {
-        int r, access;
-
-        assert(prog);
-        assert(acc);
-
-        log_trace("%s: %c %d:%d %s", __func__, type, major, minor, acc);
-
-        access = bpf_access_type(acc);
-        if (access <= 0)
-                return -EINVAL;
-
-        assert(IN_SET(type, 'b', 'c'));
-        const int bpf_type = type == 'c' ? BPF_DEVCG_DEV_CHAR : BPF_DEVCG_DEV_BLOCK;
-
-        const struct bpf_insn insn[] = {
-                BPF_MOV32_REG(BPF_REG_1, BPF_REG_3),
-                BPF_ALU32_IMM(BPF_AND, BPF_REG_1, access),
-                BPF_JMP_REG(BPF_JNE, BPF_REG_1, BPF_REG_3, 4), /* compare access type */
-
-                BPF_JMP_IMM(BPF_JNE, BPF_REG_2, bpf_type, 3),  /* compare device type */
-                BPF_JMP_IMM(BPF_JNE, BPF_REG_4, major, 2),     /* compare major */
-                BPF_JMP_IMM(BPF_JNE, BPF_REG_5, minor, 1),     /* compare minor */
-                BPF_JMP_A(PASS_JUMP_OFF),                      /* jump to PASS */
-        };
-
-        if (FLAGS_SET(access, BPF_DEVCG_ACC_READ | BPF_DEVCG_ACC_WRITE | BPF_DEVCG_ACC_MKNOD))
-                r = bpf_program_add_instructions(prog, insn + 3, ELEMENTSOF(insn) - 3);
-        else
-                r = bpf_program_add_instructions(prog, insn, ELEMENTSOF(insn));
-        if (r < 0)
-                log_error_errno(r, "Extending device control BPF program failed: %m");
-
-        return r;
-}
-
-static int bpf_prog_whitelist_major(BPFProgram *prog, char type, int major, const char *acc) {
-        int r, access;
-
-        assert(prog);
-        assert(acc);
-
-        log_trace("%s: %c %d:* %s", __func__, type, major, acc);
-
-        access = bpf_access_type(acc);
-        if (access <= 0)
-                return -EINVAL;
-
-        assert(IN_SET(type, 'b', 'c'));
-        const int bpf_type = type == 'c' ? BPF_DEVCG_DEV_CHAR : BPF_DEVCG_DEV_BLOCK;
-
-        const struct bpf_insn insn[] = {
-                BPF_MOV32_REG(BPF_REG_1, BPF_REG_3),
-                BPF_ALU32_IMM(BPF_AND, BPF_REG_1, access),
+int cgroup_bpf_whitelist_device(BPFProgram *prog, int type, int major, int minor, const char *acc) {
+        struct bpf_insn insn[] = {
+                BPF_JMP_IMM(BPF_JNE, BPF_REG_2, type, 6), /* compare device type */
+                BPF_MOV32_REG(BPF_REG_1, BPF_REG_3), /* calculate access type */
+                BPF_ALU32_IMM(BPF_AND, BPF_REG_1, 0),
                 BPF_JMP_REG(BPF_JNE, BPF_REG_1, BPF_REG_3, 3), /* compare access type */
-
-                BPF_JMP_IMM(BPF_JNE, BPF_REG_2, bpf_type, 2),  /* compare device type */
-                BPF_JMP_IMM(BPF_JNE, BPF_REG_4, major, 1),     /* compare major */
-                BPF_JMP_A(PASS_JUMP_OFF),                      /* jump to PASS */
+                BPF_JMP_IMM(BPF_JNE, BPF_REG_4, major, 2), /* compare major */
+                BPF_JMP_IMM(BPF_JNE, BPF_REG_5, minor, 1), /* compare minor */
+                BPF_JMP_A(PASS_JUMP_OFF), /* jump to PASS */
         };
-
-        if (FLAGS_SET(access, BPF_DEVCG_ACC_READ | BPF_DEVCG_ACC_WRITE | BPF_DEVCG_ACC_MKNOD))
-                r = bpf_program_add_instructions(prog, insn + 3, ELEMENTSOF(insn) - 3);
-        else
-                r = bpf_program_add_instructions(prog, insn, ELEMENTSOF(insn));
-        if (r < 0)
-                log_error_errno(r, "Extending device control BPF program failed: %m");
-
-        return r;
-}
-
-static int bpf_prog_whitelist_class(BPFProgram *prog, char type, const char *acc) {
         int r, access;
 
         assert(prog);
         assert(acc);
 
-        log_trace("%s: %c *:* %s", __func__, type, acc);
-
         access = bpf_access_type(acc);
         if (access <= 0)
                 return -EINVAL;
 
-        assert(IN_SET(type, 'b', 'c'));
-        const int bpf_type = type == 'c' ? BPF_DEVCG_DEV_CHAR : BPF_DEVCG_DEV_BLOCK;
+        insn[2].imm = access;
 
-        const struct bpf_insn insn[] = {
-                BPF_MOV32_REG(BPF_REG_1, BPF_REG_3),
-                BPF_ALU32_IMM(BPF_AND, BPF_REG_1, access),
-                BPF_JMP_REG(BPF_JNE, BPF_REG_1, BPF_REG_3, 2), /* compare access type */
-
-                BPF_JMP_IMM(BPF_JNE, BPF_REG_2, bpf_type, 1), /* compare device type */
-                BPF_JMP_A(PASS_JUMP_OFF),                     /* jump to PASS */
-        };
-
-        if (FLAGS_SET(access, BPF_DEVCG_ACC_READ | BPF_DEVCG_ACC_WRITE | BPF_DEVCG_ACC_MKNOD))
-                r = bpf_program_add_instructions(prog, insn + 3, ELEMENTSOF(insn) - 3);
-        else
-                r = bpf_program_add_instructions(prog, insn, ELEMENTSOF(insn));
+        r = bpf_program_add_instructions(prog, insn, ELEMENTSOF(insn));
         if (r < 0)
                 log_error_errno(r, "Extending device control BPF program failed: %m");
 
         return r;
 }
 
-int bpf_devices_cgroup_init(BPFProgram **ret, CGroupDevicePolicy policy, bool whitelist) {
-        const struct bpf_insn pre_insn[] = {
+int cgroup_bpf_whitelist_major(BPFProgram *prog, int type, int major, const char *acc) {
+        struct bpf_insn insn[] = {
+                BPF_JMP_IMM(BPF_JNE, BPF_REG_2, type, 5), /* compare device type */
+                BPF_MOV32_REG(BPF_REG_1, BPF_REG_3), /* calculate access type */
+                BPF_ALU32_IMM(BPF_AND, BPF_REG_1, 0),
+                BPF_JMP_REG(BPF_JNE, BPF_REG_1, BPF_REG_3, 2), /* compare access type */
+                BPF_JMP_IMM(BPF_JNE, BPF_REG_4, major, 1), /* compare major */
+                BPF_JMP_A(PASS_JUMP_OFF), /* jump to PASS */
+        };
+        int r, access;
+
+        assert(prog);
+        assert(acc);
+
+        access = bpf_access_type(acc);
+        if (access <= 0)
+                return -EINVAL;
+
+        insn[2].imm = access;
+
+        r = bpf_program_add_instructions(prog, insn, ELEMENTSOF(insn));
+        if (r < 0)
+                log_error_errno(r, "Extending device control BPF program failed: %m");
+
+        return r;
+}
+
+int cgroup_bpf_whitelist_class(BPFProgram *prog, int type, const char *acc) {
+        struct bpf_insn insn[] = {
+                BPF_JMP_IMM(BPF_JNE, BPF_REG_2, type, 5), /* compare device type */
+                BPF_MOV32_REG(BPF_REG_1, BPF_REG_3), /* calculate access type */
+                BPF_ALU32_IMM(BPF_AND, BPF_REG_1, 0),
+                BPF_JMP_REG(BPF_JNE, BPF_REG_1, BPF_REG_3, 1), /* compare access type */
+                BPF_JMP_A(PASS_JUMP_OFF), /* jump to PASS */
+        };
+        int r, access;
+
+        assert(prog);
+        assert(acc);
+
+        access = bpf_access_type(acc);
+        if (access <= 0)
+                return -EINVAL;
+
+        insn[2].imm = access;
+
+        r = bpf_program_add_instructions(prog, insn, ELEMENTSOF(insn));
+        if (r < 0)
+                log_error_errno(r, "Extending device control BPF program failed: %m");
+
+        return r;
+}
+
+int cgroup_init_device_bpf(BPFProgram **ret, CGroupDevicePolicy policy, bool whitelist) {
+        struct bpf_insn pre_insn[] = {
                 /* load device type to r2 */
-                BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
+                BPF_LDX_MEM(BPF_H, BPF_REG_2, BPF_REG_1,
                             offsetof(struct bpf_cgroup_dev_ctx, access_type)),
-                BPF_ALU32_IMM(BPF_AND, BPF_REG_2, 0xFFFF),
 
                 /* load access type to r3 */
                 BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
@@ -169,14 +135,14 @@ int bpf_devices_cgroup_init(BPFProgram **ret, CGroupDevicePolicy policy, bool wh
 
         assert(ret);
 
-        if (policy == CGROUP_DEVICE_POLICY_AUTO && !whitelist)
+        if (policy == CGROUP_AUTO && !whitelist)
                 return 0;
 
         r = bpf_program_new(BPF_PROG_TYPE_CGROUP_DEVICE, &prog);
         if (r < 0)
                 return log_error_errno(r, "Loading device control BPF program failed: %m");
 
-        if (policy == CGROUP_DEVICE_POLICY_CLOSED || whitelist) {
+        if (policy == CGROUP_CLOSED || whitelist) {
                 r = bpf_program_add_instructions(prog, pre_insn, ELEMENTSOF(pre_insn));
                 if (r < 0)
                         return log_error_errno(r, "Extending device control BPF program failed: %m");
@@ -187,73 +153,70 @@ int bpf_devices_cgroup_init(BPFProgram **ret, CGroupDevicePolicy policy, bool wh
         return 0;
 }
 
-int bpf_devices_apply_policy(
-                BPFProgram *prog,
-                CGroupDevicePolicy policy,
-                bool whitelist,
-                const char *cgroup_path,
-                BPFProgram **prog_installed) {
-
-        _cleanup_free_ char *controller_path = NULL;
-        int r;
-
-        /* This will assign *keep_program if everything goes well. */
-
-        if (!prog)
-                goto finish;
-
-        const bool deny_everything = policy == CGROUP_DEVICE_POLICY_STRICT && !whitelist;
-
-        const struct bpf_insn post_insn[] = {
+int cgroup_apply_device_bpf(Unit *u, BPFProgram *prog, CGroupDevicePolicy policy, bool whitelist) {
+        struct bpf_insn post_insn[] = {
                 /* return DENY */
                 BPF_MOV64_IMM(BPF_REG_0, 0),
                 BPF_JMP_A(1),
+
         };
 
-        const struct bpf_insn exit_insn[] = {
-                /* finally return DENY if deny_everything else ALLOW */
-                BPF_MOV64_IMM(BPF_REG_0, deny_everything ? 0 : 1),
+        struct bpf_insn exit_insn[] = {
+                /* else return ALLOW */
+                BPF_MOV64_IMM(BPF_REG_0, 1),
                 BPF_EXIT_INSN()
         };
 
-        if (!deny_everything) {
+        _cleanup_free_ char *path = NULL;
+        int r;
+
+        if (!prog) {
+                /* Remove existing program. */
+                u->bpf_device_control_installed = bpf_program_unref(u->bpf_device_control_installed);
+                return 0;
+        }
+
+        if (policy != CGROUP_STRICT || whitelist) {
+                size_t off;
+
                 r = bpf_program_add_instructions(prog, post_insn, ELEMENTSOF(post_insn));
                 if (r < 0)
                         return log_error_errno(r, "Extending device control BPF program failed: %m");
 
                 /* Fixup PASS_JUMP_OFF jump offsets. */
-                for (size_t off = 0; off < prog->n_instructions; off++) {
+                for (off = 0; off < prog->n_instructions; off++) {
                         struct bpf_insn *ins = &prog->instructions[off];
 
                         if (ins->code == (BPF_JMP | BPF_JA) && ins->off == PASS_JUMP_OFF)
                                 ins->off = prog->n_instructions - off - 1;
                 }
-        }
+        } else
+                /* Explicitly forbid everything. */
+                exit_insn[0].imm = 0;
 
         r = bpf_program_add_instructions(prog, exit_insn, ELEMENTSOF(exit_insn));
         if (r < 0)
                 return log_error_errno(r, "Extending device control BPF program failed: %m");
 
-        r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, NULL, &controller_path);
+        r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, NULL, &path);
         if (r < 0)
                 return log_error_errno(r, "Failed to determine cgroup path: %m");
 
-        r = bpf_program_cgroup_attach(prog, BPF_CGROUP_DEVICE, controller_path, BPF_F_ALLOW_MULTI);
+        r = bpf_program_cgroup_attach(prog, BPF_CGROUP_DEVICE, path, BPF_F_ALLOW_MULTI);
         if (r < 0)
-                return log_error_errno(r, "Attaching device control BPF program to cgroup %s failed: %m",
-                                       cgroup_path);
+                return log_error_errno(r, "Attaching device control BPF program to cgroup %s failed: %m", path);
 
- finish:
         /* Unref the old BPF program (which will implicitly detach it) right before attaching the new program. */
-        if (prog_installed) {
-                bpf_program_unref(*prog_installed);
-                *prog_installed = bpf_program_ref(prog);
-        }
+        u->bpf_device_control_installed = bpf_program_unref(u->bpf_device_control_installed);
+
+        /* Remember that this BPF program is installed now. */
+        u->bpf_device_control_installed = bpf_program_ref(prog);
+
         return 0;
 }
 
 int bpf_devices_supported(void) {
-        const struct bpf_insn trivial[] = {
+        struct bpf_insn trivial[] = {
                 BPF_MOV64_IMM(BPF_REG_0, 1),
                 BPF_EXIT_INSN()
         };
@@ -305,185 +268,3 @@ int bpf_devices_supported(void) {
 
         return supported = 1;
 }
-
-static int whitelist_device_pattern(BPFProgram *prog, const char *path, char type, const unsigned *maj, const unsigned *min, const char *acc) {
-        assert(IN_SET(type, 'b', 'c'));
-
-        if (cg_all_unified() > 0) {
-                if (!prog)
-                        return 0;
-
-                if (maj && min)
-                        return bpf_prog_whitelist_device(prog, type, *maj, *min, acc);
-                else if (maj)
-                        return bpf_prog_whitelist_major(prog, type, *maj, acc);
-                else
-                        return bpf_prog_whitelist_class(prog, type, acc);
-
-        } else {
-                char buf[2+DECIMAL_STR_MAX(unsigned)*2+2+4];
-                int r;
-
-                if (maj && min)
-                        xsprintf(buf, "%c %u:%u %s", type, *maj, *min, acc);
-                else if (maj)
-                        xsprintf(buf, "%c %u:* %s", type, *maj, acc);
-                else
-                        xsprintf(buf, "%c *:* %s", type, acc);
-
-                /* Changing the devices list of a populated cgroup might result in EINVAL, hence ignore
-                 * EINVAL here. */
-
-                r = cg_set_attribute("devices", path, "devices.allow", buf);
-                if (r < 0)
-                        log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES, -EPERM) ? LOG_DEBUG : LOG_WARNING,
-                                       r, "Failed to set devices.allow on %s: %m", path);
-
-                return r;
-        }
-}
-
-int bpf_devices_whitelist_device(BPFProgram *prog, const char *path, const char *node, const char *acc) {
-        mode_t mode;
-        dev_t rdev;
-        int r;
-
-        assert(path);
-        assert(acc);
-        assert(strlen(acc) <= 3);
-
-        log_trace("%s: %s %s", __func__, node, acc);
-
-        /* Some special handling for /dev/block/%u:%u, /dev/char/%u:%u, /run/systemd/inaccessible/chr and
-         * /run/systemd/inaccessible/blk paths. Instead of stat()ing these we parse out the major/minor directly. This
-         * means clients can use these path without the device node actually around */
-        r = device_path_parse_major_minor(node, &mode, &rdev);
-        if (r < 0) {
-                if (r != -ENODEV)
-                        return log_warning_errno(r, "Couldn't parse major/minor from device path '%s': %m", node);
-
-                struct stat st;
-                if (stat(node, &st) < 0)
-                        return log_warning_errno(errno, "Couldn't stat device %s: %m", node);
-
-                if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode))
-                        return log_warning_errno(SYNTHETIC_ERRNO(ENODEV), "%s is not a device.", node);
-
-                mode = st.st_mode;
-                rdev = (dev_t) st.st_rdev;
-        }
-
-        unsigned maj = major(rdev), min = minor(rdev);
-        return whitelist_device_pattern(prog, path, S_ISCHR(mode) ? 'c' : 'b', &maj, &min, acc);
-}
-
-int bpf_devices_whitelist_major(BPFProgram *prog, const char *path, const char *name, char type, const char *acc) {
-        unsigned maj;
-        int r;
-
-        assert(path);
-        assert(acc);
-        assert(IN_SET(type, 'b', 'c'));
-
-        if (streq(name, "*"))
-                /* If the name is a wildcard, then apply this list to all devices of this type */
-                return whitelist_device_pattern(prog, path, type, NULL, NULL, acc);
-
-        if (safe_atou(name, &maj) >= 0 && DEVICE_MAJOR_VALID(maj))
-                /* The name is numeric and suitable as major. In that case, let's take its major, and create
-                 * the entry directly. */
-                return whitelist_device_pattern(prog, path, type, &maj, NULL, acc);
-
-        _cleanup_fclose_ FILE *f = NULL;
-        bool good = false, any = false;
-
-        f = fopen("/proc/devices", "re");
-        if (!f)
-                return log_warning_errno(errno, "Cannot open /proc/devices to resolve %s: %m", name);
-
-        for (;;) {
-                _cleanup_free_ char *line = NULL;
-                char *w, *p;
-
-                r = read_line(f, LONG_LINE_MAX, &line);
-                if (r < 0)
-                        return log_warning_errno(r, "Failed to read /proc/devices: %m");
-                if (r == 0)
-                        break;
-
-                if (type == 'c' && streq(line, "Character devices:")) {
-                        good = true;
-                        continue;
-                }
-
-                if (type == 'b' && streq(line, "Block devices:")) {
-                        good = true;
-                        continue;
-                }
-
-                if (isempty(line)) {
-                        good = false;
-                        continue;
-                }
-
-                if (!good)
-                        continue;
-
-                p = strstrip(line);
-
-                w = strpbrk(p, WHITESPACE);
-                if (!w)
-                        continue;
-                *w = 0;
-
-                r = safe_atou(p, &maj);
-                if (r < 0)
-                        continue;
-                if (maj <= 0)
-                        continue;
-
-                w++;
-                w += strspn(w, WHITESPACE);
-
-                if (fnmatch(name, w, 0) != 0)
-                        continue;
-
-                any = true;
-                (void) whitelist_device_pattern(prog, path, type, &maj, NULL, acc);
-        }
-
-        if (!any)
-                return log_debug_errno(SYNTHETIC_ERRNO(ENOENT),
-                                       "Device whitelist pattern \"%s\" did not match anything.", name);
-
-        return 0;
-}
-
-int bpf_devices_whitelist_static(BPFProgram *prog, const char *path) {
-        static const char auto_devices[] =
-                "/dev/null\0" "rwm\0"
-                "/dev/zero\0" "rwm\0"
-                "/dev/full\0" "rwm\0"
-                "/dev/random\0" "rwm\0"
-                "/dev/urandom\0" "rwm\0"
-                "/dev/tty\0" "rwm\0"
-                "/dev/ptmx\0" "rwm\0"
-                /* Allow /run/systemd/inaccessible/{chr,blk} devices for mapping InaccessiblePaths */
-                "/run/systemd/inaccessible/chr\0" "rwm\0"
-                "/run/systemd/inaccessible/blk\0" "rwm\0";
-        int r = 0, k;
-
-        const char *node, *acc;
-        NULSTR_FOREACH_PAIR(node, acc, auto_devices) {
-                k = bpf_devices_whitelist_device(prog, path, node, acc);
-                if (r >= 0 && k < 0)
-                        r = k;
-        }
-
-        /* PTS (/dev/pts) devices may not be duplicated, but accessed */
-        k = bpf_devices_whitelist_major(prog, path, "pts", 'c', "rw");
-        if (r >= 0 && k < 0)
-                r = k;
-
-        return r;
-}

src/core/bpf-devices.h

@@ -3,19 +3,15 @@
 
 #include <inttypes.h>
 
-#include "cgroup.h"
+#include "unit.h"
 
-typedef struct BPFProgram BPFProgram;
-
-int bpf_devices_cgroup_init(BPFProgram **ret, CGroupDevicePolicy policy, bool whitelist);
-int bpf_devices_apply_policy(
-                BPFProgram *prog,
-                CGroupDevicePolicy policy,
-                bool whitelist,
-                const char *cgroup_path,
-                BPFProgram **prog_installed);
+struct BPFProgram;
 
 int bpf_devices_supported(void);
-int bpf_devices_whitelist_device(BPFProgram *prog, const char *path, const char *node, const char *acc);
-int bpf_devices_whitelist_major(BPFProgram *prog, const char *path, const char *name, char type, const char *acc);
-int bpf_devices_whitelist_static(BPFProgram *prog, const char *path);
+
+int cgroup_bpf_whitelist_device(BPFProgram *p, int type, int major, int minor, const char *acc);
+int cgroup_bpf_whitelist_major(BPFProgram *p, int type, int major, const char *acc);
+int cgroup_bpf_whitelist_class(BPFProgram *prog, int type, const char *acc);
+
+int cgroup_init_device_bpf(BPFProgram **ret, CGroupDevicePolicy policy, bool whitelist);
+int cgroup_apply_device_bpf(Unit *u, BPFProgram *p, CGroupDevicePolicy policy, bool whitelist);

src/core/bpf-firewall.c

@@ -132,7 +132,7 @@ static int add_instructions_for_ip_any(
 
         assert(p);
 
-        const struct bpf_insn insn[] = {
+        struct bpf_insn insn[] = {
                 BPF_ALU32_IMM(BPF_OR, BPF_REG_8, verdict),
         };
 
@@ -150,7 +150,7 @@ static int bpf_firewall_compile_bpf(
                 bool ip_allow_any,
                 bool ip_deny_any) {
 
-        const struct bpf_insn pre_insn[] = {
+        struct bpf_insn pre_insn[] = {
                 /*
                  * When the eBPF program is entered, R1 contains the address of the skb.
                  * However, R1-R5 are scratch registers that are not preserved when calling
@@ -186,7 +186,7 @@ static int bpf_firewall_compile_bpf(
          * This means that if both ACCESS_DENIED and ACCESS_ALLOWED are set, the packet
          * is allowed to pass.
          */
-        const struct bpf_insn post_insn[] = {
+        struct bpf_insn post_insn[] = {
                 BPF_MOV64_IMM(BPF_REG_0, 1),
                 BPF_JMP_IMM(BPF_JNE, BPF_REG_8, ACCESS_DENIED, 1),
                 BPF_MOV64_IMM(BPF_REG_0, 0),
@@ -321,7 +321,7 @@ static int bpf_firewall_compile_bpf(
                  * Exit from the eBPF program, R0 contains the verdict.
                  * 0 means the packet is denied, 1 means the packet may pass.
                  */
-                const struct bpf_insn insn[] = {
+                struct bpf_insn insn[] = {
                         BPF_EXIT_INSN()
                 };
 
@@ -795,7 +795,7 @@ int bpf_firewall_reset_accounting(int map_fd) {
 static int bpf_firewall_unsupported_reason = 0;
 
 int bpf_firewall_supported(void) {
-        const struct bpf_insn trivial[] = {
+        struct bpf_insn trivial[] = {
                 BPF_MOV64_IMM(BPF_REG_0, 1),
                 BPF_EXIT_INSN()
         };

src/core/cgroup.c

@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 
 #include <fcntl.h>
+#include <fnmatch.h>
 
 #include "sd-messages.h"
 
@@ -16,6 +17,7 @@
 #include "fd-util.h"
 #include "fileio.h"
 #include "fs-util.h"
+#include "nulstr-util.h"
 #include "parse-util.h"
 #include "path-util.h"
 #include "process-util.h"
@@ -665,6 +667,192 @@ static int lookup_block_device(const char *p, dev_t *ret) {
         return 0;
 }
 
+static int whitelist_device(BPFProgram *prog, const char *path, const char *node, const char *acc) {
+        dev_t rdev;
+        mode_t mode;
+        int r;
+
+        assert(path);
+        assert(acc);
+
+        /* Some special handling for /dev/block/%u:%u, /dev/char/%u:%u, /run/systemd/inaccessible/chr and
+         * /run/systemd/inaccessible/blk paths. Instead of stat()ing these we parse out the major/minor directly. This
+         * means clients can use these path without the device node actually around */
+        r = device_path_parse_major_minor(node, &mode, &rdev);
+        if (r < 0) {
+                if (r != -ENODEV)
+                        return log_warning_errno(r, "Couldn't parse major/minor from device path '%s': %m", node);
+
+                struct stat st;
+                if (stat(node, &st) < 0)
+                        return log_warning_errno(errno, "Couldn't stat device %s: %m", node);
+
+                if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) {
+                        log_warning("%s is not a device.", node);
+                        return -ENODEV;
+                }
+                rdev = (dev_t) st.st_rdev;
+                mode = st.st_mode;
+        }
+
+        if (cg_all_unified() > 0) {
+                if (!prog)
+                        return 0;
+
+                return cgroup_bpf_whitelist_device(prog, S_ISCHR(mode) ? BPF_DEVCG_DEV_CHAR : BPF_DEVCG_DEV_BLOCK,
+                                                   major(rdev), minor(rdev), acc);
+
+        } else {
+                char buf[2+DECIMAL_STR_MAX(dev_t)*2+2+4];
+
+                sprintf(buf,
+                        "%c %u:%u %s",
+                        S_ISCHR(mode) ? 'c' : 'b',
+                        major(rdev), minor(rdev),
+                        acc);
+
+                /* Changing the devices list of a populated cgroup might result in EINVAL, hence ignore EINVAL here. */
+
+                r = cg_set_attribute("devices", path, "devices.allow", buf);
+                if (r < 0)
+                        return log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES, -EPERM) ? LOG_DEBUG : LOG_WARNING,
+                                              r, "Failed to set devices.allow on %s: %m", path);
+
+                return 0;
+        }
+}
+
+static int whitelist_major(BPFProgram *prog, const char *path, const char *name, char type, const char *acc) {
+        _cleanup_fclose_ FILE *f = NULL;
+        char buf[2+DECIMAL_STR_MAX(unsigned)+3+4];
+        bool good = false;
+        unsigned maj;
+        int r;
+
+        assert(path);
+        assert(acc);
+        assert(IN_SET(type, 'b', 'c'));
+
+        if (streq(name, "*")) {
+                /* If the name is a wildcard, then apply this list to all devices of this type */
+
+                if (cg_all_unified() > 0) {
+                        if (!prog)
+                                return 0;
+
+                        (void) cgroup_bpf_whitelist_class(prog, type == 'c' ? BPF_DEVCG_DEV_CHAR : BPF_DEVCG_DEV_BLOCK, acc);
+                } else {
+                        xsprintf(buf, "%c *:* %s", type, acc);
+
+                        r = cg_set_attribute("devices", path, "devices.allow", buf);
+                        if (r < 0)
+                                log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
+                                               "Failed to set devices.allow on %s: %m", path);
+                        return 0;
+                }
+        }
+
+        if (safe_atou(name, &maj) >= 0 && DEVICE_MAJOR_VALID(maj)) {
+                /* The name is numeric and suitable as major. In that case, let's take is major, and create the entry
+                 * directly */
+
+                if (cg_all_unified() > 0) {
+                        if (!prog)
+                                return 0;
+
+                        (void) cgroup_bpf_whitelist_major(prog,
+                                                          type == 'c' ? BPF_DEVCG_DEV_CHAR : BPF_DEVCG_DEV_BLOCK,
+                                                          maj, acc);
+                } else {
+                        xsprintf(buf, "%c %u:* %s", type, maj, acc);
+
+                        r = cg_set_attribute("devices", path, "devices.allow", buf);
+                        if (r < 0)
+                                log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
+                                               "Failed to set devices.allow on %s: %m", path);
+                }
+
+                return 0;
+        }
+
+        f = fopen("/proc/devices", "re");
+        if (!f)
+                return log_warning_errno(errno, "Cannot open /proc/devices to resolve %s (%c): %m", name, type);
+
+        for (;;) {
+                _cleanup_free_ char *line = NULL;
+                char *w, *p;
+
+                r = read_line(f, LONG_LINE_MAX, &line);
+                if (r < 0)
+                        return log_warning_errno(r, "Failed to read /proc/devices: %m");
+                if (r == 0)
+                        break;
+
+                if (type == 'c' && streq(line, "Character devices:")) {
+                        good = true;
+                        continue;
+                }
+
+                if (type == 'b' && streq(line, "Block devices:")) {
+                        good = true;
+                        continue;
+                }
+
+                if (isempty(line)) {
+                        good = false;
+                        continue;
+                }
+
+                if (!good)
+                        continue;
+
+                p = strstrip(line);
+
+                w = strpbrk(p, WHITESPACE);
+                if (!w)
+                        continue;
+                *w = 0;
+
+                r = safe_atou(p, &maj);
+                if (r < 0)
+                        continue;
+                if (maj <= 0)
+                        continue;
+
+                w++;
+                w += strspn(w, WHITESPACE);
+
+                if (fnmatch(name, w, 0) != 0)
+                        continue;
+
+                if (cg_all_unified() > 0) {
+                        if (!prog)
+                                continue;
+
+                        (void) cgroup_bpf_whitelist_major(prog,
+                                                          type == 'c' ? BPF_DEVCG_DEV_CHAR : BPF_DEVCG_DEV_BLOCK,
+                                                          maj, acc);
+                } else {
+                        sprintf(buf,
+                                "%c %u:* %s",
+                                type,
+                                maj,
+                                acc);
+
+                        /* Changing the devices list of a populated cgroup might result in EINVAL, hence ignore EINVAL
+                         * here. */
+
+                        r = cg_set_attribute("devices", path, "devices.allow", buf);
+                        if (r < 0)
+                                log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES, -EPERM) ? LOG_DEBUG : LOG_WARNING,
+                                               r, "Failed to set devices.allow on %s: %m", path);
+                }
+        }
+
+        return 0;
+}
+
 static bool cgroup_context_has_cpu_weight(CGroupContext *c) {
         return c->cpu_weight != CGROUP_WEIGHT_INVALID ||
                 c->startup_cpu_weight != CGROUP_WEIGHT_INVALID;
@@ -955,95 +1143,6 @@ static void cgroup_apply_firewall(Unit *u) {
         (void) bpf_firewall_install(u);
 }
 
-static int cgroup_apply_devices(Unit *u) {
-        _cleanup_(bpf_program_unrefp) BPFProgram *prog = NULL;
-        const char *path;
-        CGroupContext *c;
-        CGroupDeviceAllow *a;
-        CGroupDevicePolicy policy;
-        int r;
-
-        assert_se(c = unit_get_cgroup_context(u));
-        assert_se(path = u->cgroup_path);
-
-        policy = c->device_policy;
-
-        if (cg_all_unified() > 0) {
-                r = bpf_devices_cgroup_init(&prog, policy, c->device_allow);
-                if (r < 0)
-                        return log_unit_warning_errno(u, r, "Failed to initialize device control bpf program: %m");
-
-        } else {
-                /* Changing the devices list of a populated cgroup might result in EINVAL, hence ignore
-                 * EINVAL here. */
-
-                if (c->device_allow || policy != CGROUP_DEVICE_POLICY_AUTO)
-                        r = cg_set_attribute("devices", path, "devices.deny", "a");
-                else
-                        r = cg_set_attribute("devices", path, "devices.allow", "a");
-                if (r < 0)
-                        log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES, -EPERM) ? LOG_DEBUG : LOG_WARNING, r,
-                                      "Failed to reset devices.allow/devices.deny: %m");
-        }
-
-        bool whitelist_static = policy == CGROUP_DEVICE_POLICY_CLOSED ||
-                (policy == CGROUP_DEVICE_POLICY_AUTO && c->device_allow);
-        if (whitelist_static)
-                (void) bpf_devices_whitelist_static(prog, path);
-
-        bool any = whitelist_static;
-        LIST_FOREACH(device_allow, a, c->device_allow) {
-                char acc[4], *val;
-                unsigned k = 0;
-
-                if (a->r)
-                        acc[k++] = 'r';
-                if (a->w)
-                        acc[k++] = 'w';
-                if (a->m)
-                        acc[k++] = 'm';
-                if (k == 0)
-                        continue;
-                acc[k++] = 0;
-
-                if (path_startswith(a->path, "/dev/"))
-                        r = bpf_devices_whitelist_device(prog, path, a->path, acc);
-                else if ((val = startswith(a->path, "block-")))
-                        r = bpf_devices_whitelist_major(prog, path, val, 'b', acc);
-                else if ((val = startswith(a->path, "char-")))
-                        r = bpf_devices_whitelist_major(prog, path, val, 'c', acc);
-                else {
-                        log_unit_debug(u, "Ignoring device '%s' while writing cgroup attribute.", a->path);
-                        continue;
-                }
-
-                if (r >= 0)
-                        any = true;
-        }
-
-        if (prog && !any) {
-                log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENODEV), "No devices matched by device filter.");
-
-                /* The kernel verifier would reject a program we would build with the normal intro and outro
-                   but no whitelisting rules (outro would contain an unreachable instruction for successful
-                   return). */
-                policy = CGROUP_DEVICE_POLICY_STRICT;
-        }
-
-        r = bpf_devices_apply_policy(prog, policy, any, path, &u->bpf_device_control_installed);
-        if (r < 0) {
-                static bool warned = false;
-
-                log_full_errno(warned ? LOG_DEBUG : LOG_WARNING, r,
-                               "Unit %s configures device ACL, but the local system doesn't seem to support the BPF-based device controller.\n"
-                               "Proceeding WITHOUT applying ACL (all devices will be accessible)!\n"
-                               "(This warning is only shown for the first loaded unit using device ACL.)", u->id);
-
-                warned = true;
-        }
-        return r;
-}
-
 static void cgroup_context_apply(
                 Unit *u,
                 CGroupMask apply_mask,
@@ -1320,8 +1419,88 @@ static void cgroup_context_apply(
         /* On cgroup v2 we can apply BPF everywhere. On cgroup v1 we apply it everywhere except for the root of
          * containers, where we leave this to the manager */
         if ((apply_mask & (CGROUP_MASK_DEVICES | CGROUP_MASK_BPF_DEVICES)) &&
-            (is_host_root || cg_all_unified() > 0 || !is_local_root))
-                (void) cgroup_apply_devices(u);
+            (is_host_root || cg_all_unified() > 0 || !is_local_root)) {
+                _cleanup_(bpf_program_unrefp) BPFProgram *prog = NULL;
+                CGroupDeviceAllow *a;
+
+                if (cg_all_unified() > 0) {
+                        r = cgroup_init_device_bpf(&prog, c->device_policy, c->device_allow);
+                        if (r < 0)
+                                log_unit_warning_errno(u, r, "Failed to initialize device control bpf program: %m");
+                } else {
+                        /* Changing the devices list of a populated cgroup might result in EINVAL, hence ignore EINVAL
+                         * here. */
+
+                        if (c->device_allow || c->device_policy != CGROUP_AUTO)
+                                r = cg_set_attribute("devices", path, "devices.deny", "a");
+                        else
+                                r = cg_set_attribute("devices", path, "devices.allow", "a");
+                        if (r < 0)
+                                log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES, -EPERM) ? LOG_DEBUG : LOG_WARNING, r,
+                                              "Failed to reset devices.allow/devices.deny: %m");
+                }
+
+                if (c->device_policy == CGROUP_CLOSED ||
+                    (c->device_policy == CGROUP_AUTO && c->device_allow)) {
+                        static const char auto_devices[] =
+                                "/dev/null\0" "rwm\0"
+                                "/dev/zero\0" "rwm\0"
+                                "/dev/full\0" "rwm\0"
+                                "/dev/random\0" "rwm\0"
+                                "/dev/urandom\0" "rwm\0"
+                                "/dev/tty\0" "rwm\0"
+                                "/dev/ptmx\0" "rwm\0"
+                                /* Allow /run/systemd/inaccessible/{chr,blk} devices for mapping InaccessiblePaths */
+                                "/run/systemd/inaccessible/chr\0" "rwm\0"
+                                "/run/systemd/inaccessible/blk\0" "rwm\0";
+
+                        const char *x, *y;
+
+                        NULSTR_FOREACH_PAIR(x, y, auto_devices)
+                                (void) whitelist_device(prog, path, x, y);
+
+                        /* PTS (/dev/pts) devices may not be duplicated, but accessed */
+                        (void) whitelist_major(prog, path, "pts", 'c', "rw");
+                }
+
+                LIST_FOREACH(device_allow, a, c->device_allow) {
+                        char acc[4], *val;
+                        unsigned k = 0;
+
+                        if (a->r)
+                                acc[k++] = 'r';
+                        if (a->w)
+                                acc[k++] = 'w';
+                        if (a->m)
+                                acc[k++] = 'm';
+
+                        if (k == 0)
+                                continue;
+
+                        acc[k++] = 0;
+
+                        if (path_startswith(a->path, "/dev/"))
+                                (void) whitelist_device(prog, path, a->path, acc);
+                        else if ((val = startswith(a->path, "block-")))
+                                (void) whitelist_major(prog, path, val, 'b', acc);
+                        else if ((val = startswith(a->path, "char-")))
+                                (void) whitelist_major(prog, path, val, 'c', acc);
+                        else
+                                log_unit_debug(u, "Ignoring device '%s' while writing cgroup attribute.", a->path);
+                }
+
+                r = cgroup_apply_device_bpf(u, prog, c->device_policy, c->device_allow);
+                if (r < 0) {
+                        static bool warned = false;
+
+                        log_full_errno(warned ? LOG_DEBUG : LOG_WARNING, r,
+                                 "Unit %s configures device ACL, but the local system doesn't seem to support the BPF-based device controller.\n"
+                                 "Proceeding WITHOUT applying ACL (all devices will be accessible)!\n"
+                                 "(This warning is only shown for the first loaded unit using device ACL.)", u->id);
+
+                        warned = true;
+                }
+        }
 
         if (apply_mask & CGROUP_MASK_PIDS) {
 
@@ -1430,7 +1609,7 @@ static CGroupMask unit_get_cgroup_mask(Unit *u) {
                 mask |= CGROUP_MASK_MEMORY;
 
         if (c->device_allow ||
-            c->device_policy != CGROUP_DEVICE_POLICY_AUTO)
+            c->device_policy != CGROUP_AUTO)
                 mask |= CGROUP_MASK_DEVICES | CGROUP_MASK_BPF_DEVICES;
 
         if (c->tasks_accounting ||
@@ -3568,9 +3747,9 @@ int compare_job_priority(const void *a, const void *b) {
 }
 
 static const char* const cgroup_device_policy_table[_CGROUP_DEVICE_POLICY_MAX] = {
-        [CGROUP_DEVICE_POLICY_AUTO]   = "auto",
-        [CGROUP_DEVICE_POLICY_CLOSED] = "closed",
-        [CGROUP_DEVICE_POLICY_STRICT] = "strict",
+        [CGROUP_AUTO] = "auto",
+        [CGROUP_CLOSED] = "closed",
+        [CGROUP_STRICT] = "strict",
 };
 
 int unit_get_cpuset(Unit *u, CPUSet *cpus, const char *name) {

src/core/cgroup.h

@@ -18,15 +18,16 @@ typedef struct CGroupBlockIODeviceWeight CGroupBlockIODeviceWeight;
 typedef struct CGroupBlockIODeviceBandwidth CGroupBlockIODeviceBandwidth;
 
 typedef enum CGroupDevicePolicy {
-        /* When devices listed, will allow those, plus built-in ones, if none are listed will allow
-         * everything. */
-        CGROUP_DEVICE_POLICY_AUTO,
+
+        /* When devices listed, will allow those, plus built-in ones,
+        if none are listed will allow everything. */
+        CGROUP_AUTO,
 
         /* Everything forbidden, except built-in ones and listed ones. */
-        CGROUP_DEVICE_POLICY_CLOSED,
+        CGROUP_CLOSED,
 
         /* Everything forbidden, except for the listed devices */
-        CGROUP_DEVICE_POLICY_STRICT,
+        CGROUP_STRICT,
 
         _CGROUP_DEVICE_POLICY_MAX,
         _CGROUP_DEVICE_POLICY_INVALID = -1

src/core/unit.c

@@ -4303,11 +4303,11 @@ int unit_patch_contexts(Unit *u) {
         if (cc && ec) {
 
                 if (ec->private_devices &&
-                    cc->device_policy == CGROUP_DEVICE_POLICY_AUTO)
-                        cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED;
+                    cc->device_policy == CGROUP_AUTO)
+                        cc->device_policy = CGROUP_CLOSED;
 
                 if (ec->root_image &&
-                    (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) {
+                    (cc->device_policy != CGROUP_AUTO || cc->device_allow)) {
 
                         /* When RootImage= is specified, the following devices are touched. */
                         r = cgroup_add_device_allow(cc, "/dev/loop-control", "rw");

src/run/run.c

@@ -16,7 +16,6 @@
 #include "bus-wait-for-jobs.h"
 #include "calendarspec.h"
 #include "env-util.h"
-#include "exit-status.h"
 #include "fd-util.h"
 #include "format-util.h"
 #include "main-func.h"
@@ -1257,7 +1256,7 @@ static int start_transient_service(
 
                 if (arg_wait && !arg_quiet) {
 
-                        /* Explicitly destroy the PTY forwarder, so that the PTY device is usable again, with its
+                        /* Explicitly destroy the PTY forwarder, so that the PTY device is usable again, in its
                          * original settings (i.e. proper line breaks), so that we can show the summary in a pretty
                          * way. */
                         c.forward = pty_forward_free(c.forward);
@@ -1266,52 +1265,43 @@ static int start_transient_service(
                                 log_info("Finished with result: %s", strna(c.result));
 
                         if (c.exit_code == CLD_EXITED)
-                                log_info("Main processes terminated with: code=%s/status=%i",
-                                         sigchld_code_to_string(c.exit_code), c.exit_status);
+                                log_info("Main processes terminated with: code=%s/status=%i", sigchld_code_to_string(c.exit_code), c.exit_status);
                         else if (c.exit_code > 0)
-                                log_info("Main processes terminated with: code=%s/status=%s",
-                                         sigchld_code_to_string(c.exit_code), signal_to_string(c.exit_status));
+                                log_info("Main processes terminated with: code=%s/status=%s", sigchld_code_to_string(c.exit_code), signal_to_string(c.exit_status));
 
                         if (timestamp_is_set(c.inactive_enter_usec) &&
                             timestamp_is_set(c.inactive_exit_usec) &&
                             c.inactive_enter_usec > c.inactive_exit_usec) {
                                 char ts[FORMAT_TIMESPAN_MAX];
-                                log_info("Service runtime: %s",
-                                         format_timespan(ts, sizeof ts, c.inactive_enter_usec - c.inactive_exit_usec, USEC_PER_MSEC));
+                                log_info("Service runtime: %s", format_timespan(ts, sizeof(ts), c.inactive_enter_usec - c.inactive_exit_usec, USEC_PER_MSEC));
                         }
 
                         if (c.cpu_usage_nsec != NSEC_INFINITY) {
                                 char ts[FORMAT_TIMESPAN_MAX];
-                                log_info("CPU time consumed: %s",
-                                         format_timespan(ts, sizeof ts, (c.cpu_usage_nsec + NSEC_PER_USEC - 1) / NSEC_PER_USEC, USEC_PER_MSEC));
+                                log_info("CPU time consumed: %s", format_timespan(ts, sizeof(ts), (c.cpu_usage_nsec + NSEC_PER_USEC - 1) / NSEC_PER_USEC, USEC_PER_MSEC));
                         }
 
                         if (c.ip_ingress_bytes != UINT64_MAX) {
                                 char bytes[FORMAT_BYTES_MAX];
-                                log_info("IP traffic received: %s", format_bytes(bytes, sizeof bytes, c.ip_ingress_bytes));
+                                log_info("IP traffic received: %s", format_bytes(bytes, sizeof(bytes), c.ip_ingress_bytes));
                         }
                         if (c.ip_egress_bytes != UINT64_MAX) {
                                 char bytes[FORMAT_BYTES_MAX];
-                                log_info("IP traffic sent: %s", format_bytes(bytes, sizeof bytes, c.ip_egress_bytes));
+                                log_info("IP traffic sent: %s", format_bytes(bytes, sizeof(bytes), c.ip_egress_bytes));
                         }
                         if (c.io_read_bytes != UINT64_MAX) {
                                 char bytes[FORMAT_BYTES_MAX];
-                                log_info("IO bytes read: %s", format_bytes(bytes, sizeof bytes, c.io_read_bytes));
+                                log_info("IO bytes read: %s", format_bytes(bytes, sizeof(bytes), c.io_read_bytes));
                         }
                         if (c.io_write_bytes != UINT64_MAX) {
                                 char bytes[FORMAT_BYTES_MAX];
-                                log_info("IO bytes written: %s", format_bytes(bytes, sizeof bytes, c.io_write_bytes));
+                                log_info("IO bytes written: %s", format_bytes(bytes, sizeof(bytes), c.io_write_bytes));
                         }
                 }
 
-                /* Try to propagate the service's return value. But if the service defines
-                 * e.g. SuccessExitStatus, honour this, and return 0 to mean "success". */
-                if (streq_ptr(c.result, "success"))
-                        *retval = 0;
-                else if (streq_ptr(c.result, "exit-code") && c.exit_status > 0)
+                /* Try to propagate the service's return value */
+                if (c.result && STR_IN_SET(c.result, "success", "exit-code") && c.exit_code == CLD_EXITED)
                         *retval = c.exit_status;
-                else if (streq_ptr(c.result, "signal"))
-                        *retval = EXIT_EXCEPTION;
                 else
                         *retval = EXIT_FAILURE;
         }

src/shared/tests.c

@@ -3,7 +3,6 @@
 #include <sched.h>
 #include <signal.h>
 #include <stdlib.h>
-#include <sys/mman.h>
 #include <sys/mount.h>
 #include <sys/wait.h>
 #include <util.h>
@@ -15,14 +14,11 @@
 #undef basename
 
 #include "alloc-util.h"
-#include "cgroup-setup.h"
-#include "cgroup-util.h"
 #include "env-file.h"
 #include "env-util.h"
 #include "fs-util.h"
 #include "log.h"
 #include "path-util.h"
-#include "random-util.h"
 #include "strv.h"
 #include "tests.h"
 
@@ -153,50 +149,3 @@ bool have_namespaces(void) {
 
         assert_not_reached("unexpected exit code");
 }
-
-bool can_memlock(void) {
-        /* Let's see if we can mlock() a larger blob of memory. BPF programs are charged against
-         * RLIMIT_MEMLOCK, hence let's first make sure we can lock memory at all, and skip the test if we
-         * cannot. Why not check RLIMIT_MEMLOCK explicitly? Because in container environments the
-         * RLIMIT_MEMLOCK value we see might not match the RLIMIT_MEMLOCK value actually in effect. */
-
-        void *p = mmap(NULL, CAN_MEMLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_SHARED, -1, 0);
-        if (p == MAP_FAILED)
-                return false;
-
-        bool b = mlock(p, CAN_MEMLOCK_SIZE) >= 0;
-        if (b)
-                assert_se(munlock(p, CAN_MEMLOCK_SIZE) >= 0);
-
-        assert_se(munmap(p, CAN_MEMLOCK_SIZE) >= 0);
-        return b;
-}
-
-int enter_cgroup_subroot(char **ret_cgroup) {
-        _cleanup_free_ char *cgroup_root = NULL, *cgroup_subroot = NULL;
-        CGroupMask supported;
-        int r;
-
-        r = cg_pid_get_path(NULL, 0, &cgroup_root);
-        if (r == -ENOMEDIUM)
-                return log_warning_errno(r, "cg_pid_get_path(NULL, 0, ...) failed: %m");
-        assert(r >= 0);
-
-        assert_se(asprintf(&cgroup_subroot, "%s/%" PRIx64, cgroup_root, random_u64()) >= 0);
-        assert_se(cg_mask_supported(&supported) >= 0);
-
-        /* If this fails, then we don't mind as the later cgroup operations will fail too, and it's fine if
-         * we handle any errors at that point. */
-
-        r = cg_create_everywhere(supported, _CGROUP_MASK_ALL, cgroup_subroot);
-        if (r < 0)
-                return r;
-
-        r = cg_attach_everywhere(supported, cgroup_subroot, 0, NULL, NULL);
-        if (r < 0)
-                return r;
-
-        if (ret_cgroup)
-                *ret_cgroup = TAKE_PTR(cgroup_subroot);
-        return 0;
-}

src/shared/tests.h

@@ -3,23 +3,7 @@
 
 #include <stdbool.h>
 
-#include "sd-daemon.h"
-
-#include "macro.h"
-
-static inline bool manager_errno_skip_test(int r) {
-        return IN_SET(abs(r),
-                      EPERM,
-                      EACCES,
-                      EADDRINUSE,
-                      EHOSTDOWN,
-                      ENOENT,
-                      ENOMEDIUM /* cannot determine cgroup */
-        );
-}
-
 char* setup_fake_runtime_dir(void);
-int enter_cgroup_subroot(char **ret_cgroup);
 const char* get_testdata_dir(void);
 const char* get_catalog_dir(void);
 bool slow_tests_enabled(void);
@@ -28,14 +12,3 @@ int log_tests_skipped(const char *message);
 int log_tests_skipped_errno(int r, const char *message);
 
 bool have_namespaces(void);
-
-/* We use the small but non-trivial limit here */
-#define CAN_MEMLOCK_SIZE (512 * 1024U)
-bool can_memlock(void);
-
-#define TEST_REQ_RUNNING_SYSTEMD(x)                                 \
-        if (sd_booted() > 0) {                                      \
-                x;                                                  \
-        } else {                                                    \
-                printf("systemd not booted skipping '%s'\n", #x);   \
-        }

src/test/meson.build

@@ -50,7 +50,8 @@ tests += [
          [],
          []],
 
-        [['src/test/test-engine.c'],
+        [['src/test/test-engine.c',
+          'src/test/test-helper.c'],
          [libcore,
           libudev,
           libshared],
@@ -139,7 +140,8 @@ tests += [
          [],
          []],
 
-        [['src/test/test-unit-name.c'],
+        [['src/test/test-unit-name.c',
+          'src/test/test-helper.c'],
          [libcore,
           libshared],
          [threads,
@@ -149,7 +151,8 @@ tests += [
           libmount,
           libblkid]],
 
-        [['src/test/test-load-fragment.c'],
+        [['src/test/test-load-fragment.c',
+          'src/test/test-helper.c'],
          [libcore,
           libshared],
          [threads,
@@ -424,7 +427,8 @@ tests += [
          [libbasic],
          []],
 
-        [['src/test/test-bpf-devices.c'],
+        [['src/test/test-bpf.c',
+          'src/test/test-helper.c'],
          [libcore,
           libshared],
          [libmount,
@@ -434,17 +438,8 @@ tests += [
           libselinux,
           libblkid]],
 
-        [['src/test/test-bpf-firewall.c'],
-         [libcore,
-          libshared],
-         [libmount,
-          threads,
-          librt,
-          libseccomp,
-          libselinux,
-          libblkid]],
-
-        [['src/test/test-watch-pid.c'],
+        [['src/test/test-watch-pid.c',
+          'src/test/test-helper.c'],
          [libcore,
           libshared],
          [libmount,
@@ -594,12 +589,14 @@ tests += [
           libshared],
          []],
 
-        [['src/test/test-cgroup-unit-default.c'],
+        [['src/test/test-cgroup-unit-default.c',
+          'src/test/test-helper.c'],
          [libcore,
           libshared],
          []],
 
-        [['src/test/test-cgroup-mask.c'],
+        [['src/test/test-cgroup-mask.c',
+          'src/test/test-helper.c'],
          [libcore,
           libshared],
          [threads,
@@ -646,7 +643,8 @@ tests += [
          [],
          '', 'manual'],
 
-        [['src/test/test-path.c'],
+        [['src/test/test-path.c',
+          'src/test/test-helper.c'],
          [libcore,
           libshared],
          [threads,
@@ -656,7 +654,8 @@ tests += [
           libmount,
           libblkid]],
 
-        [['src/test/test-execute.c'],
+        [['src/test/test-execute.c',
+          'src/test/test-helper.c'],
          [libcore,
           libshared],
          [threads,
@@ -685,7 +684,8 @@ tests += [
          [],
          []],
 
-        [['src/test/test-sched-prio.c'],
+        [['src/test/test-sched-prio.c',
+          'src/test/test-helper.c'],
          [libcore,
           libshared],
          [threads,

src/test/test-bpf-devices.c

@@ -1,306 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1+ */
-
-#include <sys/resource.h>
-#include <sys/time.h>
-#include <unistd.h>
-
-#include "alloc-util.h"
-#include "bpf-devices.h"
-#include "bpf-program.h"
-#include "cgroup-setup.h"
-#include "errno-list.h"
-#include "fd-util.h"
-#include "fs-util.h"
-#include "path-util.h"
-#include "tests.h"
-
-static void test_policy_closed(const char *cgroup_path, BPFProgram **installed_prog) {
-        _cleanup_(bpf_program_unrefp) BPFProgram *prog = NULL;
-        unsigned wrong = 0;
-        int r;
-
-        log_info("/* %s */", __func__);
-
-        r = bpf_devices_cgroup_init(&prog, CGROUP_DEVICE_POLICY_CLOSED, true);
-        assert_se(r >= 0);
-
-        r = bpf_devices_whitelist_static(prog, cgroup_path);
-        assert_se(r >= 0);
-
-        r = bpf_devices_apply_policy(prog, CGROUP_DEVICE_POLICY_CLOSED, true, cgroup_path, installed_prog);
-        assert_se(r >= 0);
-
-        const char *s;
-        FOREACH_STRING(s, "/dev/null",
-                          "/dev/zero",
-                          "/dev/full",
-                          "/dev/random",
-                          "/dev/urandom",
-                          "/dev/tty",
-                          "/dev/ptmx") {
-                _cleanup_close_ int fd, fd2;
-
-                fd = open(s, O_CLOEXEC|O_RDONLY|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                wrong += fd < 0 && errno == EPERM;
-                /* We ignore errors other than EPERM, e.g. ENOENT or ENXIO */
-
-                fd2 = open(s, O_CLOEXEC|O_WRONLY|O_NOCTTY);
-                log_debug("open(%s, \"w\") = %d/%s", s, fd2, fd2 < 0 ? errno_to_name(errno) : "-");
-                wrong += fd2 < 0 && errno == EPERM;
-        }
-        assert_se(wrong == 0);
-}
-
-static void test_policy_strict(const char *cgroup_path, BPFProgram **installed_prog) {
-        _cleanup_(bpf_program_unrefp) BPFProgram *prog = NULL;
-        unsigned wrong = 0;
-        int r;
-
-        log_info("/* %s */", __func__);
-
-        r = bpf_devices_cgroup_init(&prog, CGROUP_DEVICE_POLICY_STRICT, true);
-        assert_se(r >= 0);
-
-        r = bpf_devices_whitelist_device(prog, cgroup_path, "/dev/null", "rw");
-        assert_se(r >= 0);
-
-        r = bpf_devices_whitelist_device(prog, cgroup_path, "/dev/random", "r");
-        assert_se(r >= 0);
-
-        r = bpf_devices_whitelist_device(prog, cgroup_path, "/dev/zero", "w");
-        assert_se(r >= 0);
-
-        r = bpf_devices_apply_policy(prog, CGROUP_DEVICE_POLICY_STRICT, true, cgroup_path, installed_prog);
-        assert_se(r >= 0);
-
-        {
-                _cleanup_close_ int fd, fd2;
-                const char *s = "/dev/null";
-
-                fd = open(s, O_CLOEXEC|O_RDONLY|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                wrong += fd < 0;
-
-                fd2 = open(s, O_CLOEXEC|O_WRONLY|O_NOCTTY);
-                log_debug("open(%s, \"w\") = %d/%s", s, fd2, fd2 < 0 ? errno_to_name(errno) : "-");
-                wrong += fd2 < 0;
-        }
-
-        {
-                _cleanup_close_ int fd, fd2;
-                const char *s = "/dev/random";
-
-                fd = open(s, O_CLOEXEC|O_RDONLY|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                wrong += fd < 0;
-
-                fd2 = open(s, O_CLOEXEC|O_WRONLY|O_NOCTTY);
-                log_debug("open(%s, \"w\") = %d/%s", s, fd2, fd2 < 0 ? errno_to_name(errno) : "-");
-                wrong += fd2 >= 0;
-        }
-
-        {
-                _cleanup_close_ int fd, fd2;
-                const char *s = "/dev/zero";
-
-                fd = open(s, O_CLOEXEC|O_RDONLY|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                wrong += fd >= 0;
-
-                fd2 = open(s, O_CLOEXEC|O_WRONLY|O_NOCTTY);
-                log_debug("open(%s, \"w\") = %d/%s", s, fd2, fd2 < 0 ? errno_to_name(errno) : "-");
-                wrong += fd2 < 0;
-        }
-
-        {
-                _cleanup_close_ int fd, fd2;
-                const char *s = "/dev/full";
-
-                fd = open(s, O_CLOEXEC|O_RDONLY|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                wrong += fd >= 0;
-
-                fd2 = open(s, O_CLOEXEC|O_WRONLY|O_NOCTTY);
-                log_debug("open(%s, \"w\") = %d/%s", s, fd2, fd2 < 0 ? errno_to_name(errno) : "-");
-                wrong += fd2 >= 0;
-        }
-
-        assert_se(wrong == 0);
-}
-
-static void test_policy_whitelist_major(const char *pattern, const char *cgroup_path, BPFProgram **installed_prog) {
-        _cleanup_(bpf_program_unrefp) BPFProgram *prog = NULL;
-        unsigned wrong = 0;
-        int r;
-
-        log_info("/* %s(%s) */", __func__, pattern);
-
-        r = bpf_devices_cgroup_init(&prog, CGROUP_DEVICE_POLICY_STRICT, true);
-        assert_se(r >= 0);
-
-        r = bpf_devices_whitelist_major(prog, cgroup_path, pattern, 'c', "rw");
-        assert_se(r >= 0);
-
-        r = bpf_devices_apply_policy(prog, CGROUP_DEVICE_POLICY_STRICT, true, cgroup_path, installed_prog);
-        assert_se(r >= 0);
-
-        /* /dev/null, /dev/full have major==1, /dev/tty has major==5 */
-        {
-                _cleanup_close_ int fd, fd2;
-                const char *s = "/dev/null";
-
-                fd = open(s, O_CLOEXEC|O_RDONLY|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                wrong += fd < 0;
-
-                fd2 = open(s, O_CLOEXEC|O_WRONLY|O_NOCTTY);
-                log_debug("open(%s, \"w\") = %d/%s", s, fd2, fd2 < 0 ? errno_to_name(errno) : "-");
-                wrong += fd2 < 0;
-        }
-
-        {
-                _cleanup_close_ int fd, fd2;
-                const char *s = "/dev/full";
-
-                fd = open(s, O_CLOEXEC|O_RDONLY|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                wrong += fd < 0;
-
-                fd2 = open(s, O_CLOEXEC|O_WRONLY|O_NOCTTY);
-                log_debug("open(%s, \"w\") = %d/%s", s, fd2, fd2 < 0 ? errno_to_name(errno) : "-");
-                wrong += fd2 < 0;
-        }
-
-        {
-                _cleanup_close_ int fd, fd2;
-                const char *s = "/dev/tty";
-
-                fd = open(s, O_CLOEXEC|O_RDONLY|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                wrong += fd >= 0;
-
-                fd2 = open(s, O_CLOEXEC|O_WRONLY|O_NOCTTY);
-                log_debug("open(%s, \"w\") = %d/%s", s, fd2, fd2 < 0 ? errno_to_name(errno) : "-");
-                wrong += fd2 >= 0;
-        }
-
-        assert_se(wrong == 0);
-}
-
-static void test_policy_whitelist_major_star(char type, const char *cgroup_path, BPFProgram **installed_prog) {
-        _cleanup_(bpf_program_unrefp) BPFProgram *prog = NULL;
-        unsigned wrong = 0;
-        int r;
-
-        log_info("/* %s(type=%c) */", __func__, type);
-
-        r = bpf_devices_cgroup_init(&prog, CGROUP_DEVICE_POLICY_STRICT, true);
-        assert_se(r >= 0);
-
-        r = bpf_devices_whitelist_major(prog, cgroup_path, "*", type, "rw");
-        assert_se(r >= 0);
-
-        r = bpf_devices_apply_policy(prog, CGROUP_DEVICE_POLICY_STRICT, true, cgroup_path, installed_prog);
-        assert_se(r >= 0);
-
-        {
-                _cleanup_close_ int fd;
-                const char *s = "/dev/null";
-
-                fd = open(s, O_CLOEXEC|O_RDWR|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                if (type == 'c')
-                        wrong += fd < 0;
-                else
-                        wrong += fd >= 0;
-        }
-
-        assert_se(wrong == 0);
-}
-
-static void test_policy_empty(bool add_mismatched, const char *cgroup_path, BPFProgram **installed_prog) {
-        _cleanup_(bpf_program_unrefp) BPFProgram *prog = NULL;
-        unsigned wrong = 0;
-        int r;
-
-        log_info("/* %s(add_mismatched=%s) */", __func__, yes_no(add_mismatched));
-
-        r = bpf_devices_cgroup_init(&prog, CGROUP_DEVICE_POLICY_STRICT, add_mismatched);
-        assert_se(r >= 0);
-
-        if (add_mismatched) {
-                r = bpf_devices_whitelist_major(prog, cgroup_path, "foobarxxx", 'c', "rw");
-                assert_se(r < 0);
-        }
-
-        r = bpf_devices_apply_policy(prog, CGROUP_DEVICE_POLICY_STRICT, false, cgroup_path, installed_prog);
-        assert_se(r >= 0);
-
-        {
-                _cleanup_close_ int fd;
-                const char *s = "/dev/null";
-
-                fd = open(s, O_CLOEXEC|O_RDWR|O_NOCTTY);
-                log_debug("open(%s, \"r\") = %d/%s", s, fd, fd < 0 ? errno_to_name(errno) : "-");
-                wrong += fd >= 0;
-        }
-
-        assert_se(wrong == 0);
-}
-
-
-int main(int argc, char *argv[]) {
-        _cleanup_free_ char *cgroup = NULL, *parent = NULL;
-        _cleanup_(rmdir_and_freep) char *controller_path = NULL;
-        CGroupMask supported;
-        struct rlimit rl;
-        int r;
-
-        test_setup_logging(LOG_DEBUG);
-
-        assert_se(getrlimit(RLIMIT_MEMLOCK, &rl) >= 0);
-        rl.rlim_cur = rl.rlim_max = MAX(rl.rlim_max, CAN_MEMLOCK_SIZE);
-        (void) setrlimit(RLIMIT_MEMLOCK, &rl);
-
-        r = cg_all_unified();
-        if (r <= 0)
-                return log_tests_skipped("We don't seem to be running with unified cgroup hierarchy");
-
-        if (!can_memlock())
-                return log_tests_skipped("Can't use mlock()");
-
-        r = enter_cgroup_subroot(&cgroup);
-        if (r == -ENOMEDIUM)
-                return log_tests_skipped("cgroupfs not available");
-
-        r = bpf_devices_supported();
-        if (!r)
-                return log_tests_skipped("BPF device filter not supported");
-        assert_se(r == 1);
-
-        r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, cgroup, NULL, &controller_path);
-        assert_se(r >= 0);
-
-        _cleanup_(bpf_program_unrefp) BPFProgram *prog = NULL;
-
-        test_policy_closed(cgroup, &prog);
-        test_policy_strict(cgroup, &prog);
-
-        test_policy_whitelist_major("mem", cgroup, &prog);
-        test_policy_whitelist_major("1", cgroup, &prog);
-
-        test_policy_whitelist_major_star('c', cgroup, &prog);
-        test_policy_whitelist_major_star('b', cgroup, &prog);
-
-        test_policy_empty(false, cgroup, &prog);
-        test_policy_empty(true, cgroup, &prog);
-
-        assert_se(parent = dirname_malloc(cgroup));
-
-        assert_se(cg_mask_supported(&supported) >= 0);
-        r = cg_attach_everywhere(supported, parent, 0, NULL, NULL);
-        assert_se(r >= 0);
-
-        return 0;
-}

src/test/test-bpf.c

@@ -2,6 +2,7 @@
 
 #include <linux/bpf_insn.h>
 #include <string.h>
+#include <sys/mman.h>
 #include <unistd.h>
 
 #include "bpf-firewall.h"
@@ -10,12 +11,37 @@
 #include "manager.h"
 #include "rm-rf.h"
 #include "service.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "unit.h"
 #include "virt.h"
 
+/* We use the same limit here that PID 1 bumps RLIMIT_MEMLOCK to if it can */
+#define CAN_MEMLOCK_SIZE (64U*1024U*1024U)
+
+static bool can_memlock(void) {
+        void *p;
+        bool b;
+
+        /* Let's see if we can mlock() a larger blob of memory. BPF programs are charged against
+         * RLIMIT_MEMLOCK, hence let's first make sure we can lock memory at all, and skip the test if we
+         * cannot. Why not check RLIMIT_MEMLOCK explicitly? Because in container environments the
+         * RLIMIT_MEMLOCK value we see might not match the RLIMIT_MEMLOCK value actually in effect. */
+
+        p = mmap(NULL, CAN_MEMLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_SHARED, -1, 0);
+        if (p == MAP_FAILED)
+                return false;
+
+        b = mlock(p, CAN_MEMLOCK_SIZE) >= 0;
+        if (b)
+                assert_se(munlock(p, CAN_MEMLOCK_SIZE) >= 0);
+
+        assert_se(munmap(p, CAN_MEMLOCK_SIZE) >= 0);
+        return b;
+}
+
 int main(int argc, char *argv[]) {
-        const struct bpf_insn exit_insn[] = {
+        struct bpf_insn exit_insn[] = {
                 BPF_MOV64_IMM(BPF_REG_0, 0), /* drop */
                 BPF_EXIT_INSN()
         };
@@ -35,16 +61,16 @@ int main(int argc, char *argv[]) {
         test_setup_logging(LOG_DEBUG);
 
         if (detect_container() > 0)
-                return log_tests_skipped("test-bpf-firewall fails inside LXC and Docker containers: https://github.com/systemd/systemd/issues/9666");
+                return log_tests_skipped("test-bpf fails inside LXC and Docker containers: https://github.com/systemd/systemd/issues/9666");
 
         assert_se(getrlimit(RLIMIT_MEMLOCK, &rl) >= 0);
-        rl.rlim_cur = rl.rlim_max = MAX(rl.rlim_max, CAN_MEMLOCK_SIZE);
+        rl.rlim_cur = rl.rlim_max = MAX3(rl.rlim_cur, rl.rlim_max, CAN_MEMLOCK_SIZE);
         (void) setrlimit(RLIMIT_MEMLOCK, &rl);
 
         if (!can_memlock())
-                return log_tests_skipped("Can't use mlock()");
+                return log_tests_skipped("Can't use mlock(), skipping.");
 
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 

src/test/test-cgroup-mask.c

@@ -8,6 +8,7 @@
 #include "manager.h"
 #include "rm-rf.h"
 #include "string-util.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "unit.h"
 
@@ -33,7 +34,7 @@ static int test_cgroup_mask(void) {
         int r;
         CGroupMask cpu_accounting_mask = get_cpu_accounting_mask();
 
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 

src/test/test-cgroup-unit-default.c

@@ -5,6 +5,7 @@
 #include "cgroup.h"
 #include "manager.h"
 #include "rm-rf.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "unit.h"
 
@@ -18,7 +19,7 @@ static int test_default_memory_low(void) {
         uint64_t dml_tree_default;
         int r;
 
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 

src/test/test-cgroup-util.c

@@ -13,6 +13,7 @@
 #include "stat-util.h"
 #include "string-util.h"
 #include "strv.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "user-util.h"
 #include "util.h"

src/test/test-engine.c

@@ -7,6 +7,7 @@
 #include "manager.h"
 #include "rm-rf.h"
 #include "strv.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "service.h"
 
@@ -21,7 +22,7 @@ int main(int argc, char *argv[]) {
 
         test_setup_logging(LOG_DEBUG);
 
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 
@@ -29,7 +30,7 @@ int main(int argc, char *argv[]) {
         assert_se(set_unit_path(get_testdata_dir()) >= 0);
         assert_se(runtime_dir = setup_fake_runtime_dir());
         r = manager_new(UNIT_FILE_USER, MANAGER_TEST_RUN_BASIC, &m);
-        if (manager_errno_skip_test(r))
+        if (MANAGER_SKIP_TEST(r))
                 return log_tests_skipped_errno(r, "manager_new");
         assert_se(r >= 0);
         assert_se(manager_startup(m, NULL, NULL) >= 0);

src/test/test-execute.c

@@ -20,6 +20,7 @@
 #endif
 #include "service.h"
 #include "stat-util.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "unit.h"
 #include "user-util.h"
@@ -36,11 +37,6 @@ static int cld_dumped_to_killed(int code) {
         return code == CLD_DUMPED ? CLD_KILLED : code;
 }
 
-_unused_ static bool is_run_on_travis_ci(void) {
-        /* https://docs.travis-ci.com/user/environment-variables#default-environment-variables */
-        return streq_ptr(getenv("TRAVIS"), "true");
-}
-
 static void wait_for_service_finish(Manager *m, Unit *unit) {
         Service *service = NULL;
         usec_t ts;
@@ -785,7 +781,7 @@ static int run_tests(UnitFileScope scope, const test_entry tests[], char **patte
         assert_se(tests);
 
         r = manager_new(scope, MANAGER_TEST_RUN_BASIC, &m);
-        if (manager_errno_skip_test(r))
+        if (MANAGER_SKIP_TEST(r))
                 return log_tests_skipped_errno(r, "manager_new");
         assert_se(r >= 0);
         assert_se(manager_startup(m, NULL, NULL) >= 0);
@@ -869,7 +865,7 @@ int main(int argc, char *argv[]) {
         if (getuid() != 0)
                 return log_tests_skipped("not root");
 
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 

src/test/test-helper.c

@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "test-helper.h"
+#include "random-util.h"
+#include "alloc-util.h"
+#include "cgroup-setup.h"
+#include "string-util.h"
+
+int enter_cgroup_subroot(void) {
+        _cleanup_free_ char *cgroup_root = NULL, *cgroup_subroot = NULL;
+        CGroupMask supported;
+        int r;
+
+        r = cg_pid_get_path(NULL, 0, &cgroup_root);
+        if (r == -ENOMEDIUM)
+                return log_warning_errno(r, "cg_pid_get_path(NULL, 0, ...) failed: %m");
+        assert(r >= 0);
+
+        assert_se(asprintf(&cgroup_subroot, "%s/%" PRIx64, cgroup_root, random_u64()) >= 0);
+        assert_se(cg_mask_supported(&supported) >= 0);
+
+        /* If this fails, then we don't mind as the later cgroup operations will fail too, and it's fine if we handle
+         * any errors at that point. */
+
+        r = cg_create_everywhere(supported, _CGROUP_MASK_ALL, cgroup_subroot);
+        if (r < 0)
+                return r;
+
+        return cg_attach_everywhere(supported, cgroup_subroot, 0, NULL, NULL);
+}
+
+/* https://docs.travis-ci.com/user/environment-variables#default-environment-variables */
+bool is_run_on_travis_ci(void) {
+        return streq_ptr(getenv("TRAVIS"), "true");
+}

src/test/test-helper.h

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+/***
+  Copyright © 2013 Holger Hans Peter Freyther
+***/
+
+#include "sd-daemon.h"
+
+#include "macro.h"
+
+#define TEST_REQ_RUNNING_SYSTEMD(x)                                 \
+        if (sd_booted() > 0) {                                      \
+                x;                                                  \
+        } else {                                                    \
+                printf("systemd not booted skipping '%s'\n", #x);   \
+        }
+
+#define MANAGER_SKIP_TEST(r)                                    \
+        IN_SET(r,                                               \
+               -EPERM,                                          \
+               -EACCES,                                         \
+               -EADDRINUSE,                                     \
+               -EHOSTDOWN,                                      \
+               -ENOENT,                                         \
+               -ENOMEDIUM /* cannot determine cgroup */         \
+               )
+
+int enter_cgroup_subroot(void);
+
+bool is_run_on_travis_ci(void);

src/test/test-load-fragment.c

@@ -23,6 +23,7 @@
 #include "specifier.h"
 #include "string-util.h"
 #include "strv.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "tmpfile-util.h"
 #include "user-util.h"
@@ -96,7 +97,7 @@ static void test_config_parse_exec(void) {
         _cleanup_(unit_freep) Unit *u = NULL;
 
         r = manager_new(UNIT_FILE_USER, MANAGER_TEST_RUN_MINIMAL, &m);
-        if (manager_errno_skip_test(r)) {
+        if (MANAGER_SKIP_TEST(r)) {
                 log_notice_errno(r, "Skipping test: manager_new: %m");
                 return;
         }
@@ -441,7 +442,7 @@ static void test_config_parse_log_extra_fields(void) {
         ExecContext c = {};
 
         r = manager_new(UNIT_FILE_USER, MANAGER_TEST_RUN_MINIMAL, &m);
-        if (manager_errno_skip_test(r)) {
+        if (MANAGER_SKIP_TEST(r)) {
                 log_notice_errno(r, "Skipping test: manager_new: %m");
                 return;
         }
@@ -779,7 +780,7 @@ int main(int argc, char *argv[]) {
 
         test_setup_logging(LOG_INFO);
 
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 

src/test/test-path.c

@@ -16,6 +16,7 @@
 #include "rm-rf.h"
 #include "string-util.h"
 #include "strv.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "unit.h"
 #include "util.h"
@@ -31,12 +32,12 @@ static int setup_test(Manager **m) {
 
         assert_se(m);
 
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 
         r = manager_new(UNIT_FILE_USER, MANAGER_TEST_RUN_BASIC, &tmp);
-        if (manager_errno_skip_test(r))
+        if (MANAGER_SKIP_TEST(r))
                 return log_tests_skipped_errno(r, "manager_new");
         assert_se(r >= 0);
         assert_se(manager_startup(tmp, NULL, NULL) >= 0);

src/test/test-process-util.c

@@ -25,6 +25,7 @@
 #include "stdio-util.h"
 #include "string-util.h"
 #include "terminal-util.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "util.h"
 #include "virt.h"

src/test/test-sched-prio.c

@@ -9,6 +9,7 @@
 #include "macro.h"
 #include "manager.h"
 #include "rm-rf.h"
+#include "test-helper.h"
 #include "tests.h"
 
 int main(int argc, char *argv[]) {
@@ -20,7 +21,7 @@ int main(int argc, char *argv[]) {
 
         test_setup_logging(LOG_INFO);
 
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 
@@ -28,7 +29,7 @@ int main(int argc, char *argv[]) {
         assert_se(set_unit_path(get_testdata_dir()) >= 0);
         assert_se(runtime_dir = setup_fake_runtime_dir());
         r = manager_new(UNIT_FILE_USER, MANAGER_TEST_RUN_BASIC, &m);
-        if (manager_errno_skip_test(r))
+        if (MANAGER_SKIP_TEST(r))
                 return log_tests_skipped_errno(r, "manager_new");
         assert_se(r >= 0);
         assert_se(manager_startup(m, NULL, NULL) >= 0);

src/test/test-unit-name.c

@@ -15,6 +15,7 @@
 #include "special.h"
 #include "specifier.h"
 #include "string-util.h"
+#include "test-helper.h"
 #include "tests.h"
 #include "unit-def.h"
 #include "unit-name.h"
@@ -233,7 +234,7 @@ static int test_unit_printf(void) {
         assert_se(get_shell(&shell) >= 0);
 
         r = manager_new(UNIT_FILE_USER, MANAGER_TEST_RUN_MINIMAL, &m);
-        if (manager_errno_skip_test(r))
+        if (MANAGER_SKIP_TEST(r))
                 return log_tests_skipped_errno(r, "manager_new");
         assert_se(r == 0);
 
@@ -870,7 +871,7 @@ int main(int argc, char* argv[]) {
 
         test_setup_logging(LOG_INFO);
 
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 

src/test/test-watch-pid.c

@@ -4,6 +4,7 @@
 #include "manager.h"
 #include "rm-rf.h"
 #include "service.h"
+#include "test-helper.h"
 #include "tests.h"
 
 int main(int argc, char *argv[]) {
@@ -16,7 +17,7 @@ int main(int argc, char *argv[]) {
 
         if (getuid() != 0)
                 return log_tests_skipped("not root");
-        r = enter_cgroup_subroot(NULL);
+        r = enter_cgroup_subroot();
         if (r == -ENOMEDIUM)
                 return log_tests_skipped("cgroupfs not available");
 

src/timedate/timedated.c

@@ -277,35 +277,20 @@ static int context_read_data(Context *c) {
 
 static int context_write_data_timezone(Context *c) {
         _cleanup_free_ char *p = NULL;
-        const char *source;
 
         assert(c);
 
-        /* No timezone is very similar to UTC. Hence in either of these cases link the UTC file in. Except if
-         * it isn't installed, in which case we remove the symlink altogether. Since glibc defaults to an
-         * internal version of UTC in that case behaviour is mostly equivalent. We still prefer creating the
-         * symlink though, since things are more self explanatory then. */
-
-        if (isempty(c->zone) || streq(c->zone, "UTC")) {
-
-                if (access("/usr/share/zoneinfo/UTC", F_OK) < 0) {
-
-                        if (unlink("/etc/localtime") < 0 && errno != ENOENT)
-                                return -errno;
-
-                        return 0;
-                }
-
-                source = "../usr/share/zoneinfo/UTC";
-        } else {
-                p = path_join("../usr/share/zoneinfo", c->zone);
-                if (!p)
-                        return -ENOMEM;
-
-                source = p;
+        if (isempty(c->zone)) {
+                if (unlink("/etc/localtime") < 0 && errno != ENOENT)
+                        return -errno;
+                return 0;
         }
 
-        return symlink_atomic(source, "/etc/localtime");
+        p = path_join("../usr/share/zoneinfo", c->zone);
+        if (!p)
+                return log_oom();
+
+        return symlink_atomic(p, "/etc/localtime");
 }
 
 static int context_write_data_local_rtc(Context *c) {
@@ -653,7 +638,7 @@ static int method_set_timezone(sd_bus_message *m, void *userdata, sd_bus_error *
                 return r;
 
         if (!timezone_is_valid(z, LOG_DEBUG))
-                return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid or not installed time zone '%s'", z);
+                return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid time zone '%s'", z);
 
         if (streq_ptr(z, c->zone))
                 return sd_bus_reply_method_return(m, NULL);