[Xen-devel] [PATCH for-4.6 4/5] oxenstored: fix systemd socket activation

[Wei Liu <wei.liu2@xxxxxxxxxx>]

Use the correct API sd_listen_fds to determine whether the process is
started by systemd.

Change sd_booted to booted_by_systemd to avoid confusion with systemd's
API.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
Cc: Dave Scott <dave.scott@xxxxxxxxxxxxx>

For 4.6: without this oxenstored is broken when running on a system with
systemd but not started by systemd.
---
 tools/ocaml/xenstored/systemd.ml      | 2 +-
 tools/ocaml/xenstored/systemd.mli     | 4 ++--
 tools/ocaml/xenstored/systemd_stubs.c | 6 +++---
 tools/ocaml/xenstored/utils.ml        | 2 +-
 tools/ocaml/xenstored/xenstored.ml    | 2 +-
 5 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/tools/ocaml/xenstored/systemd.ml b/tools/ocaml/xenstored/systemd.ml
index 2aa39ea..6120fd4 100644
--- a/tools/ocaml/xenstored/systemd.ml
+++ b/tools/ocaml/xenstored/systemd.ml
@@ -13,5 +13,5 @@
  *)
 
 external sd_listen_fds: string -> Unix.file_descr = "ocaml_sd_listen_fds"
-external sd_booted: unit -> bool = "ocaml_sd_booted"
+external booted_by_systemd: unit -> bool = "ocaml_booted_by_systemd"
 external sd_notify_ready: unit -> unit = "ocaml_sd_notify_ready"
diff --git a/tools/ocaml/xenstored/systemd.mli 
b/tools/ocaml/xenstored/systemd.mli
index 85c9f2e..293b5bc 100644
--- a/tools/ocaml/xenstored/systemd.mli
+++ b/tools/ocaml/xenstored/systemd.mli
@@ -17,8 +17,8 @@
  *  us do sanity checks on the expected sockets *)
 val sd_listen_fds: string -> Unix.file_descr
 
-(** Tells us whether or not systemd support was compiled in *)
-val sd_booted: unit -> bool
+(** Tells us whether or not the process is booted by systemd *)
+val booted_by_systemd: unit -> bool
 
 (** Tells systemd we're ready *)
 external sd_notify_ready: unit -> unit = "ocaml_sd_notify_ready"
diff --git a/tools/ocaml/xenstored/systemd_stubs.c 
b/tools/ocaml/xenstored/systemd_stubs.c
index d924ff1..354539e 100644
--- a/tools/ocaml/xenstored/systemd_stubs.c
+++ b/tools/ocaml/xenstored/systemd_stubs.c
@@ -92,14 +92,14 @@ CAMLprim value ocaml_sd_listen_fds(value connect_to)
        CAMLreturn(sock_ret);
 }
 
-CAMLprim value ocaml_sd_booted(value ignore)
+CAMLprim value ocaml_booted_by_systemd(value ignore)
 {
        CAMLparam1(ignore);
        CAMLlocal1(ret);
 
        ret = Val_false;
 
-       if (sd_booted())
+       if (sd_listen_fds(0) > 0)
                ret = Val_true;
 
        CAMLreturn(ret);
@@ -129,7 +129,7 @@ CAMLprim value ocaml_sd_listen_fds(value connect_to)
        CAMLreturn(sock_ret);
 }
 
-CAMLprim value ocaml_sd_booted(value ignore)
+CAMLprim value ocaml_booted_by_systemd(value ignore)
 {
        CAMLparam1(ignore);
        CAMLlocal1(ret);
diff --git a/tools/ocaml/xenstored/utils.ml b/tools/ocaml/xenstored/utils.ml
index 61321c6..fad15b3 100644
--- a/tools/ocaml/xenstored/utils.ml
+++ b/tools/ocaml/xenstored/utils.ml
@@ -84,7 +84,7 @@ let create_regular_unix_socket name =
         sock
 
 let create_unix_socket name =
-        if Systemd.sd_booted() then
+        if Systemd.booted_by_systemd() then
                 Systemd.sd_listen_fds name
         else
                 create_regular_unix_socket name
diff --git a/tools/ocaml/xenstored/xenstored.ml 
b/tools/ocaml/xenstored/xenstored.ml
index bfe689b..409223d 100644
--- a/tools/ocaml/xenstored/xenstored.ml
+++ b/tools/ocaml/xenstored/xenstored.ml
@@ -431,7 +431,7 @@ let _ =
        while not !quit
        do
                try
-                        if Systemd.sd_booted() then
+                        if Systemd.booted_by_systemd() then
                                 Systemd.sd_notify_ready ();
                        main_loop ()
                with exc ->
-- 
2.1.4


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