generators: rework mount generators

- Add support for finding and mounting /srv based on GPT data, similar
  to how we already handly /home.

- Share the fsck logic between GPT, EFI and fstab generators

- Make sure we never run the EFI generator inside containers

- Drop DefaultDependencies=no from EFI mount units

- Other fixes

1 files changed, 50 insertions, 21 deletions

diff --git a/src/efi-boot-generator/efi-boot-generator.c b/src/efi-boot-generator/efi-boot-generator.c
index 606d35bf79..270dc226ef 100644
--- a/src/efi-boot-generator/efi-boot-generator.c
+++ b/src/efi-boot-generator/efi-boot-generator.c
@@ -27,15 +27,18 @@
 #include "util.h"
 #include "mkdir.h"
 #include "unit-name.h"
+#include "virt.h"
+#include "generator.h"
+#include "special.h"
 
 static const char *arg_dest = "/tmp";
 
 int main(int argc, char *argv[]) {
+        _cleanup_free_ char *what = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
         int r = EXIT_SUCCESS;
         sd_id128_t id;
-        _cleanup_free_ char *what = NULL, *fsck = NULL;
         char *name;
-        _cleanup_fclose_ FILE *f = NULL, *f2 = NULL;
 
         if (argc > 1 && argc != 4) {
                 log_error("This program takes three or no arguments.");
@@ -51,16 +54,30 @@ int main(int argc, char *argv[]) {
 
         umask(0022);
 
-        if (!is_efi_boot())
+        if (in_initrd()) {
+                log_debug("In initrd, exiting.");
                 return EXIT_SUCCESS;
+        }
+        if (detect_container(NULL) > 0) {
+                log_debug("In a container, exiting.");
+                return EXIT_SUCCESS;
+        }
 
-        if (dir_is_empty("/boot") <= 0)
+        if (!is_efi_boot()) {
+                log_debug("Not an EFI boot, exiting.");
                 return EXIT_SUCCESS;
+        }
+
+        if (dir_is_empty("/boot") <= 0) {
+                log_debug("/boot already populated, exiting.");
+                return EXIT_SUCCESS;
+        }
 
         r = efi_loader_get_device_part_uuid(&id);
-        if (r == -ENOENT)
+        if (r == -ENOENT) {
+                log_debug("EFI loader partition unknown exiting.");
                 return EXIT_SUCCESS;
-        if (r < 0) {
+        } else if (r < 0) {
                 log_error("Failed to read ESP partition UUID: %s", strerror(-r));
                 return EXIT_FAILURE;
         }
@@ -80,28 +97,34 @@ int main(int argc, char *argv[]) {
                 return EXIT_FAILURE;
         }
 
-        fsck = unit_name_from_path_instance("systemd-fsck", what, ".service");
-        if (!fsck) {
-                log_oom();
-                return EXIT_FAILURE;
-        }
-
         fprintf(f,
                 "# Automatially generated by systemd-efi-boot-generator\n\n"
                 "[Unit]\n"
-                "Description=EFI System Partition\n"
-                "Requires=%s\n"
-                "After=%s\n"
+                "Description=EFI System Partition\n");
+
+        r = generator_write_fsck_deps(f, arg_dest, what, "/boot", "vfat");
+        if (r < 0)
+                return EXIT_FAILURE;
+
+        fprintf(f,
                 "\n"
                 "[Mount]\n"
-                "Where=/boot\n"
                 "What=%s\n"
+                "Where=/boot\n"
+                "Type=vfat\n"
                 "Options=umask=0077,noauto\n",
-                fsck, fsck, what);
+                what);
+
+        fflush(f);
+        if (ferror(f)) {
+                log_error("Failed to write mount unit file: %m");
+                return EXIT_FAILURE;
+        }
 
         name = strappenda(arg_dest, "/boot.automount");
-        f2 = fopen(name, "wxe");
-        if (!f2) {
+        fclose(f);
+        f = fopen(name, "wxe");
+        if (!f) {
                 log_error("Failed to create automount unit file %s: %m", name);
                 return EXIT_FAILURE;
         }
@@ -110,9 +133,15 @@ int main(int argc, char *argv[]) {
               "[Unit]\n"
               "Description=EFI System Partition Automount\n\n"
               "[Automount]\n"
-              "Where=/boot\n", f2);
+              "Where=/boot\n", f);
+
+        fflush(f);
+        if (ferror(f)) {
+                log_error("Failed to write automount unit file: %m");
+                return EXIT_FAILURE;
+        }
 
-        name = strappenda(arg_dest, "/local-fs.target.wants/boot.automount");
+        name = strappenda(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/boot.automount");
         mkdir_parents(name, 0755);
 
         if (symlink("../boot.automount", name) < 0) {