From d09c35c48005669c4c4663e3ba8a6f979432cead Mon Sep 17 00:00:00 2001

From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>

Date: Tue, 5 Sep 2017 11:30:33 +0200

Subject: [PATCH] cryptsetup-generator: use remote-cryptsetup.target when

 _netdev is present

This allows such devices to depend on the network. Their startup will

be delayed similarly to network mount units.

Fixes #4642.

Cherry-picked from: b001ad61e91b6499897f0c977045c7608c233bfa

Resolves: #1384014

---

 man/crypttab.xml                      | 13 ++++++++++

 src/cryptsetup/cryptsetup-generator.c | 36 ++++++++++++++++++---------

 2 files changed, 37 insertions(+), 12 deletions(-)

diff --git a/man/crypttab.xml b/man/crypttab.xml

index 3e249ad23..7085a1623 100644

--- a/man/crypttab.xml

+++ b/man/crypttab.xml

@@ -189,6 +189,19 @@

         <option>size=</option>.</para></listitem>

       </varlistentry>

+      <varlistentry>

+        <term><option>_netdev</option></term>

+

+        <listitem><para>Marks this cryptsetup device as requiring network. It will be

+        started after the network is available, similarly to

+        <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>

+        units marked with <option>_netdev</option>. The service unit to set up this device

+        will be ordered between <filename>remote-cryptsetup-pre.target</filename> and

+        <filename>remote-cryptsetup.target</filename>, instead of

+        <filename>cryptsetup-pre.target</filename> and

+        <filename>cryptsetup.target</filename>.</para></listitem>

+      </varlistentry>

+

       <varlistentry>

         <term><option>noauto</option></term>

diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c

index d191def5f..49dc8f14b 100644

--- a/src/cryptsetup/cryptsetup-generator.c

+++ b/src/cryptsetup/cryptsetup-generator.c

@@ -60,7 +60,7 @@ static int create_disk(

         _cleanup_free_ char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *to = NULL, *e = NULL,

                 *filtered = NULL;

         _cleanup_fclose_ FILE *f = NULL;

-        bool noauto, nofail, tmp, swap;

+        bool noauto, nofail, tmp, swap, netdev;

         char *from;

         int r;

@@ -71,6 +71,7 @@ static int create_disk(

         nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0");

         tmp = fstab_test_option(options, "tmp\0");

         swap = fstab_test_option(options, "swap\0");

+        netdev = fstab_test_option(options, "_netdev\0");

         if (tmp && swap) {

                 log_error("Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", name);

@@ -101,22 +102,24 @@ static int create_disk(

         if (!f)

                 return log_error_errno(errno, "Failed to create unit file %s: %m", p);

-        fputs(

+        fprintf(f,

                 "# Automatically generated by systemd-cryptsetup-generator\n\n"

                 "[Unit]\n"

-                "Description=Cryptography Setup for %I\n"

+                "Description=Cryptography Setup for %%I\n"

                 "Documentation=man:crypttab(5) man:systemd-cryptsetup-generator(8) man:systemd-cryptsetup@.service(8)\n"

                 "SourcePath=/etc/crypttab\n"

                 "DefaultDependencies=no\n"

                 "Conflicts=umount.target\n"

-                "BindsTo=dev-mapper-%i.device\n"

+                "BindsTo=dev-mapper-%%i.device\n"

                 "IgnoreOnIsolate=true\n"

-                "After=systemd-readahead-collect.service systemd-readahead-replay.service cryptsetup-pre.target\n",

-                f);

+                "After=systemd-readahead-collect.service systemd-readahead-replay.service\n"

+                "After=%s\n",

+                netdev ? "remote-cryptsetup-pre.target" : "cryptsetup-pre.target");

         if (!nofail)

                 fprintf(f,

-                        "Before=cryptsetup.target\n");

+                        "Before=%s\n",

+                        netdev ? "remote-cryptsetup.target" : "cryptsetup.target");

         if (password) {

                 if (STR_IN_SET(password, "/dev/urandom", "/dev/random", "/dev/hw_random"))

@@ -196,16 +199,25 @@ static int create_disk(

                         return log_error_errno(errno, "Failed to create symlink %s: %m", to);

                 free(to);

-                if (!nofail)

-                        to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);

-                else

-                        to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL);

+                if (!netdev) {

+                        if (!nofail)

+                                to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);

+                        else

+                                to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL);

+                } else {

+                        if (!nofail)

+                                to = strjoin(arg_dest, "/remote-cryptsetup.target.requires/", n, NULL);

+                        else

+                                to = strjoin(arg_dest, "/remote-cryptsetup.target.wants/", n, NULL);

+                }

                 if (!to)

                         return log_oom();

                 mkdir_parents_label(to, 0755);

-                if (symlink(from, to) < 0)

+                if (symlink(from, to) < 0) {

+                        free(to);

                         return log_error_errno(errno, "Failed to create symlink %s: %m", to);

+                }

         }

         free(to);