qemu: add patches

1 files changed, 65 insertions, 0 deletions

diff --git a/qemu-fix-agent-paths.patch b/qemu-fix-agent-paths.patch
new file mode 100644
index 0000000..0c29890
--- /dev/null
+++ b/qemu-fix-agent-paths.patch
@@ -0,0 +1,65 @@
+Allow a QEMU host to set the time and shutdown Guix guests.  Styled
+after the patch from the Nix package:
+
+https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/virtualization/qemu/fix-qemu-ga.patch
+
+diff --git a/qga/commands-posix.c b/qga/commands-posix.c
+--- a/qga/commands-posix.c
++++ b/qga/commands-posix.c
+@@ -84,6 +84,7 @@ static void ga_wait_child(pid_t pid, int *status, Error **errp)
+ void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
+ {
+     const char *shutdown_flag;
++    const char *command;
+     Error *local_err = NULL;
+     pid_t pid;
+     int status;
+@@ -101,10 +102,13 @@ void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
+     slog("guest-shutdown called, mode: %s", mode);
+     if (!has_mode || strcmp(mode, "powerdown") == 0) {
+         shutdown_flag = powerdown_flag;
++        command = "shutdown";
+     } else if (strcmp(mode, "halt") == 0) {
+         shutdown_flag = halt_flag;
++        command = "halt";
+     } else if (strcmp(mode, "reboot") == 0) {
+         shutdown_flag = reboot_flag;
++        command = "reboot";
+     } else {
+         error_setg(errp,
+                    "mode is invalid (valid values are: halt|powerdown|reboot");
+@@ -123,6 +127,11 @@ void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
+         execl("/sbin/shutdown", "shutdown", shutdown_flag, "-g0", "-y",
+               "hypervisor initiated shutdown", (char *)NULL);
+ #else
++        /* try Guix’s shutdown/halt/reboot first */
++        char *path = g_strdup_printf("/run/current-system/profile/sbin/%s", command);
++        execl(path, command, (char *)NULL);
++        g_free(path);
++
+         execl("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
+                "hypervisor initiated shutdown", (char *)NULL);
+ #endif
+@@ -159,10 +168,12 @@ void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
+     Error *local_err = NULL;
+     struct timeval tv;
+     static const char hwclock_path[] = "/sbin/hwclock";
++    static const char hwclock_path_guix[] = "/run/current-system/profile/sbin/hwclock";
+     static int hwclock_available = -1;
+ 
+     if (hwclock_available < 0) {
+-        hwclock_available = (access(hwclock_path, X_OK) == 0);
++        hwclock_available = (access(hwclock_path_guix, X_OK) == 0) ||
++                            (access(hwclock_path, X_OK) == 0);
+     }
+ 
+     if (!hwclock_available) {
+@@ -208,6 +219,8 @@ void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
+ 
+         /* Use '/sbin/hwclock -w' to set RTC from the system time,
+          * or '/sbin/hwclock -s' to set the system time from RTC. */
++        execl(hwclock_path_guix, "hwclock", has_time ? "-w" : "-s",
++               NULL);
+         execl(hwclock_path, "hwclock", has_time ? "-w" : "-s", NULL);
+         _exit(EXIT_FAILURE);
+     } else if (pid < 0) {