TODO

@@ -49,6 +49,11 @@ Features:
 * nspawn: make --bind= work sanely with --private-users when uid mapping mounts
   are used.
 
+* cryptsetup: tweak tpm2-device=auto logic, abort quickly if firmware tells us
+  there isn't any TPM2 device anyway. that way, we'll wait for the TPM2 device
+  to show up only if registered in LUKS header + the firmware suggests there is
+  a device worth waiting for.
+
 * systemd-sysext: optionally, run it in initrd already, before transitioning
   into host, to open up possibility for services shipped like that.
 
@@ -97,6 +102,20 @@ Features:
 
 * move multiseat vid/pid matches from logind udev rule to hwdb
 
+* nspawn: default to 1:1 userns
+
+* Provide a reasonably bespoke solution for mounting host $HOME directories
+  into containers:
+  • add new option --mount-user=$USER for mounting $HOME of the user into the
+    container at the same place
+  • check /etc/passwd for UID or user name clashes. If UID clash pick a different
+    UID in container, and map via userns. If user name clash, refuse. If
+    matching user already exists use that.
+  • otherwise: write user record of specified user into /run/host/passwd or so
+  • in nss-systemd pick up user record from there and make available to system
+  With all that in place if nspawn host and container payload are up-to-date
+  enough we have a very simple way to make host users available in containers.
+
 * whenever we receive fds via SCM_RIGHTS make sure none got dropped due to the
   reception limit the kernel silently enforces.
 
@@ -223,6 +242,8 @@ Features:
 * homed: keep an fd to the homedir open at all times, to keep the fs pinned
   (autofs and such) while user is logged in.
 
+* nss-systemd: also synthesize shadow records for users/groups
+
 * make use of new glibc 2.32 APIs sigabbrev_np() and strerrorname_np().
 
 * when main nspawn supervisor process gets suspended due to SIGSTOP/SIGTTOU or
@@ -435,6 +456,9 @@ Features:
   shouldn't operate in a volatile mode unless we got told so from a trusted
   source.
 
+* figure out automatic partition discovery when combining writable root dir
+  with immutable /usr
+
 * coredump: maybe when coredumping read a new xattr from /proc/$PID/exe that
   may be used to mark a whole binary as non-coredumpable. Would fix:
   https://bugs.freedesktop.org/show_bug.cgi?id=69447
@@ -555,6 +579,10 @@ Features:
   a seccomp option we don't have to set NNP. For that, change uid first whil
   keeping CAP_SYS_ADMIN, then apply seccomp, the drop cap.
 
+* add a concept for automatically loading per-unit secrets off disk and
+  inserting them into the kernel keyring. Maybe SecretsDirectory= similar to
+  ConfigurationDirectory=.
+
 * when no locale is configured, default to UEFI's PlatformLang variable
 
 * bootctl,sd-boot: actually honour the "architecture" key
@@ -607,6 +635,13 @@ Features:
   output of "systemctl list-units" slightly by showing the tree structure of
   the slices, and the units attached to them.
 
+* the a-posteriori stopping of units bound to units that disappeared logic
+  should be reworked: there should be a queue of units, and we should only
+  enqueue stop jobs from a defer event that processes queue instead of
+  right-away when we find a unit that is bound to one that doesn't exist
+  anymore. (similar to how the stop-unneeded queue has been reworked the same
+  way)
+
 * nspawn: make nspawn suitable for shell pipelines: instead of triggering a
   hangup when input is finished, send ^D, which synthesizes an EOF. Then wait
   for hangup or ^D before passing on the EOF.
@@ -1368,6 +1403,7 @@ Features:
     https://bugzilla.redhat.com/show_bug.cgi?id=723942
   - allow writing multiple conditions in unit files on one line
   - introduce Type=pid-file
+  - introduce mix of BindTo and Requisite
   - add a concept of RemainAfterExit= to scope units
   - Allow multiple ExecStart= for all Type= settings, so that we can cover rescue.service nicely
   - add verification of [Install] section to systemd-analyze verify

docs/CODING_STYLE.md

@@ -143,37 +143,18 @@ layout: default
 
 ## Using C Constructs
 
-- Allocate local variables where it makes sense: at the top of the block, or at
-  the point where they can be initialized. `r` is typically used for a local
-  state variable, but should almost always be declared at the top of the
-  function.
+- Preferably allocate local variables on the top of the block:
 
   ```c
   {
-          uint64_t a, b;
-          int r;
+          int a, b;
 
-          a = frobnicate();
-          b = a + 5;
-
-          r = do_something();
-          if (r < 0)
-                  …
+          a = 5;
+          b = a;
   }
   ```
 
-- Do not mix function invocations with variable definitions in one line.
-
-  ```c
-  {
-          uint64_t x = 7;
-          int a;
-
-          a = foobar();
-  }
-  ```
-
-  instead of:
+- Do not mix function invocations with variable definitions in one line. Wrong:
 
   ```c
   {
@@ -182,7 +163,18 @@ layout: default
   }
   ```
 
-- Use `goto` for cleaning up, and only use it for that. I.e. you may only jump
+  Right:
+
+  ```c
+  {
+          int a;
+          uint64_t x = 7;
+
+          a = foobar();
+  }
+  ```
+
+- Use `goto` for cleaning up, and only use it for that. i.e. you may only jump
   to the end of a function, and little else. Never jump backwards!
 
 - To minimize strict aliasing violations, we prefer unions over casting.
@@ -355,7 +347,8 @@ layout: default
   `log_oom()` for then printing a short message, but not in "library" code.
 
 - Avoid fixed-size string buffers, unless you really know the maximum size and
-  that maximum size is small. It is often nicer to use dynamic memory,
+  that maximum size is small. They are a source of errors, since they possibly
+  result in truncated strings. It is often nicer to use dynamic memory,
   `alloca()` or VLAs. If you do allocate fixed-size strings on the stack, then
   it is probably only OK if you either use a maximum size such as `LINE_MAX`,
   or count in detail the maximum size a string can have. (`DECIMAL_STR_MAX` and

src/test/test-stat-util.c

@@ -6,14 +6,12 @@
 #include <unistd.h>
 
 #include "alloc-util.h"
-#include "errno-list.h"
 #include "fd-util.h"
 #include "macro.h"
 #include "mountpoint-util.h"
 #include "namespace-util.h"
 #include "path-util.h"
 #include "stat-util.h"
-#include "tests.h"
 #include "tmpfile-util.h"
 
 static void test_files_same(void) {
@@ -21,8 +19,6 @@ static void test_files_same(void) {
         char name[] = "/tmp/test-files_same.XXXXXX";
         char name_alias[] = "/tmp/test-files_same.alias";
 
-        log_info("/* %s */", __func__);
-
         fd = mkostemp_safe(name);
         assert_se(fd >= 0);
         assert_se(symlink(name, name_alias) >= 0);
@@ -41,8 +37,6 @@ static void test_is_symlink(void) {
         char name_link[] = "/tmp/test-is_symlink.link";
         _cleanup_close_ int fd = -1;
 
-        log_info("/* %s */", __func__);
-
         fd = mkostemp_safe(name);
         assert_se(fd >= 0);
         assert_se(symlink(name, name_link) >= 0);
@@ -56,33 +50,17 @@ static void test_is_symlink(void) {
 }
 
 static void test_path_is_fs_type(void) {
-        log_info("/* %s */", __func__);
-
         /* run might not be a mount point in build chroots */
         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0) {
                 assert_se(path_is_fs_type("/run", TMPFS_MAGIC) > 0);
                 assert_se(path_is_fs_type("/run", BTRFS_SUPER_MAGIC) == 0);
         }
-        if (path_is_mount_point("/proc", NULL, AT_SYMLINK_FOLLOW) > 0) {
-                assert_se(path_is_fs_type("/proc", PROC_SUPER_MAGIC) > 0);
-                assert_se(path_is_fs_type("/proc", BTRFS_SUPER_MAGIC) == 0);
-        }
+        assert_se(path_is_fs_type("/proc", PROC_SUPER_MAGIC) > 0);
+        assert_se(path_is_fs_type("/proc", BTRFS_SUPER_MAGIC) == 0);
         assert_se(path_is_fs_type("/i-dont-exist", BTRFS_SUPER_MAGIC) == -ENOENT);
 }
 
 static void test_path_is_temporary_fs(void) {
-        const char *s;
-        int r;
-
-        log_info("/* %s */", __func__);
-
-        FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
-                r = path_is_temporary_fs(s);
-
-                log_info_errno(r, "path_is_temporary_fs(\"%s\"): %d, %s",
-                               s, r, r < 0 ? errno_to_name(r) : yes_no(r));
-        }
-
         /* run might not be a mount point in build chroots */
         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0)
                 assert_se(path_is_temporary_fs("/run") > 0);
@@ -90,42 +68,13 @@ static void test_path_is_temporary_fs(void) {
         assert_se(path_is_temporary_fs("/i-dont-exist") == -ENOENT);
 }
 
-static void test_path_is_read_only_fs(void) {
-        const char *s;
-        int r;
-
-        log_info("/* %s */", __func__);
-
-        FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
-                r = path_is_read_only_fs(s);
-
-                log_info_errno(r, "path_is_read_only_fs(\"%s\"): %d, %s",
-                               s, r, r < 0 ? errno_to_name(r) : yes_no(r));
-        }
-
-        if (path_is_mount_point("/sys", NULL, AT_SYMLINK_FOLLOW) > 0)
-                assert_se(IN_SET(path_is_read_only_fs("/sys"), 0, 1));
-
-        assert_se(path_is_read_only_fs("/proc") == 0);
-        assert_se(path_is_read_only_fs("/i-dont-exist") == -ENOENT);
-}
-
 static void test_fd_is_ns(void) {
         _cleanup_close_ int fd = -1;
-
-        log_info("/* %s */", __func__);
-
         assert_se(fd_is_ns(STDIN_FILENO, CLONE_NEWNET) == 0);
         assert_se(fd_is_ns(STDERR_FILENO, CLONE_NEWNET) == 0);
         assert_se(fd_is_ns(STDOUT_FILENO, CLONE_NEWNET) == 0);
 
-        fd = open("/proc/self/ns/mnt", O_CLOEXEC|O_RDONLY);
-        if (fd < 0) {
-                assert_se(errno == ENOENT);
-                log_notice("Path %s not found, skipping test", "/proc/self/ns/mnt");
-                return;
-        }
-        assert_se(fd >= 0);
+        assert_se((fd = open("/proc/self/ns/mnt", O_CLOEXEC|O_RDONLY)) >= 0);
         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 0, -EUCLEAN));
         fd = safe_close(fd);
 
@@ -138,8 +87,6 @@ static void test_fd_is_ns(void) {
 }
 
 static void test_device_major_minor_valid(void) {
-        log_info("/* %s */", __func__);
-
         /* on glibc dev_t is 64bit, even though in the kernel it is only 32bit */
         assert_cc(sizeof(dev_t) == sizeof(uint64_t));
 
@@ -181,21 +128,11 @@ static void test_device_path_make_canonical_one(const char *path) {
         mode_t mode;
         int r;
 
-        log_debug("> %s", path);
-
-        if (stat(path, &st) < 0) {
-                assert(errno == ENOENT);
-                log_notice("Path %s not found, skipping test", path);
-                return;
-        }
-
+        assert_se(stat(path, &st) >= 0);
         r = device_path_make_canonical(st.st_mode, st.st_rdev, &resolved);
-        if (r == -ENOENT) {
-                /* maybe /dev/char/x:y and /dev/block/x:y are missing in this test environment, because we
-                 * run in a container or so? */
-                log_notice("Device %s cannot be resolved, skipping test", path);
+        if (r == -ENOENT) /* maybe /dev/char/x:y and /dev/block/x:y are missing in this test environment, because we
+                           * run in a container or so? */
                 return;
-        }
 
         assert_se(r >= 0);
         assert_se(path_equal(path, resolved));
@@ -208,7 +145,6 @@ static void test_device_path_make_canonical_one(const char *path) {
 }
 
 static void test_device_path_make_canonical(void) {
-        log_info("/* %s */", __func__);
 
         test_device_path_make_canonical_one("/dev/null");
         test_device_path_make_canonical_one("/dev/zero");
@@ -224,14 +160,10 @@ static void test_device_path_make_canonical(void) {
 }
 
 int main(int argc, char *argv[]) {
-        log_show_color(true);
-        test_setup_logging(LOG_INFO);
-
         test_files_same();
         test_is_symlink();
         test_path_is_fs_type();
         test_path_is_temporary_fs();
-        test_path_is_read_only_fs();
         test_fd_is_ns();
         test_device_major_minor_valid();
         test_device_path_make_canonical();