config: add 'homehost' option to 'AUTO' line.

[thirdparty/mdadm.git] / config.c

diff --git a/config.c b/config.c
index 07a12dcb3ff6f98d358c964378a6a3a6f4445879..20c46e9eb1fc058cb5290b1502f63d735defdc73 100644 (file)
--- a/config.c
+++ b/config.c
@@ -891,18 +891,26 @@ int conf_test_dev(char *devname)
        return 0;
 }
 
-int conf_test_metadata(const char *version)
+int conf_test_metadata(const char *version, int is_homehost)
 {
        /* Check if the given metadata version is allowed
         * to be auto-assembled.
         * The default is 'yes' but the 'auto' line might over-ride that.
-        * Word in auto_options are processed in order with the first
+        * Words in auto_options are processed in order with the first
         * match winning.
         * word can be:
         *   +version   - that version can be assembled
         *   -version   - that version cannot be auto-assembled
         *   yes or +all - any other version can be assembled
         *   no or -all  - no other version can be assembled.
+        *   homehost   - any array associated by 'homehost' to this
+        *                host can be assembled.
+        *
+        * Thus:
+        *   +ddf -0.90 homehost -all
+        * will auto-assemble any ddf array, no 0.90 array, and
+        * any other array (imsm, 1.x) if and only if it is identified
+        * as belonging to this host.
         */
        char *w;
        load_conffile();
@@ -914,6 +922,12 @@ int conf_test_metadata(const char *version)
                        return 1;
                if (strcasecmp(w, "no") == 0)
                        return 0;
+               if (strcasecmp(w, "homehost") == 0) {
+                       if (is_homehost)
+                               return 1;
+                       else
+                               continue;
+               }
                if (w[0] == '+')
                        rv = 1;
                else if (w[0] == '-')