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-rw-r--r--src/libsystemd/sd-bus/bus-kernel.c27
1 files changed, 9 insertions, 18 deletions
diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index bd829459de..e73a5077b5 100644
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -1741,30 +1741,21 @@ int bus_kernel_fix_attach_mask(void) {
/* By default we don't want any kdbus metadata fields to be
* suppressed, hence we reset the kernel mask for it to
- * (uint64_t) -1. This is overridable via a kernel command
- * line option, however. */
+ * (uint64_t) -1. If the module argument was overwritten by
+ * the kernel cmdline, we leave it as is. */
- r = get_proc_cmdline_key("systemd.kdbus_attach_flags_mask=", &mask);
+ r = get_proc_cmdline_key("kdbus.attach_flags_mask=", &mask);
if (r < 0)
return log_warning_errno(r, "Failed to read kernel command line: %m");
- if (mask) {
- const char *p = mask;
-
- if (startswith(p, "0x"))
- p += 2;
-
- if (sscanf(p, "%" PRIx64, &m) != 1)
- log_warning("Couldn't parse systemd.kdbus_attach_flags_mask= kernel command line parameter.");
+ if (r == 0) {
+ sprintf(buf, "0x%" PRIx64 "\n", m);
+ r = write_string_file("/sys/module/kdbus/parameters/attach_flags_mask", buf);
+ if (r < 0)
+ return log_full_errno(IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r,
+ "Failed to write kdbus attach mask: %m");
}
- sprintf(buf, "0x%" PRIx64 "\n", m);
- r = write_string_file("/sys/module/kdbus/parameters/attach_flags_mask", buf);
- if (r < 0)
- return log_full_errno(
- IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r,
- "Failed to write kdbus attach mask: %m");
-
return 0;
}