DDF: guid_str: convenience function to print GUID for debugging

[thirdparty/mdadm.git] / super-ddf.c

diff --git a/super-ddf.c b/super-ddf.c
index 0a04519d10ffa8ef7c404968c20d0a97cc2cdeea..083b9e61b2fd832a10e39f5b61b678b439b8f330 100644 (file)
--- a/super-ddf.c
+++ b/super-ddf.c
@@ -1296,6 +1296,17 @@ static void print_guid(char *guid, int tstamp)
        printf(")");
 }
 
+static const char *guid_str(const char *guid)
+{
+       static char buf[DDF_GUID_LEN*2+1];
+       int i;
+       char *p = buf;
+       for (i = 0; i < DDF_GUID_LEN; i++)
+               p += sprintf(p, "%02x", (unsigned char)guid[i]);
+       *p = '\0';
+       return (const char *) buf;
+}
+
 static void examine_vd(int n, struct ddf_super *sb, char *guid)
 {
        int crl = sb->conf_rec_len;
@@ -2792,6 +2803,9 @@ static int __write_ddf_structure(struct dl *d, struct ddf_super *ddf, __u8 type,
                                        &dummy);
                }
                if (c) {
+                       dprintf("writing conf record %i on disk %08x for %s/%u\n",
+                               i, d->disk.refnum, guid_str(vdc->guid),
+                               vdc->sec_elmnt_seq);
                        vdc->seqnum = header->seq;
                        vdc->crc = calc_crc(vdc, conf_size);
                        if (write(fd, vdc, conf_size) < 0)