From be9b9ef42edcea314d3061a368c3ad52a5af647e Mon Sep 17 00:00:00 2001 From: "mwilck@arcor.de" Date: Wed, 3 Jul 2013 22:28:03 +0200 Subject: [PATCH] DDF: guid_str: convenience function to print GUID for debugging For debugging DDF structure changes, it is important to be able to identify VCs by their GUIDs. Signed-off-by: Martin Wilck Signed-off-by: NeilBrown --- super-ddf.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/super-ddf.c b/super-ddf.c index 0a04519..083b9e6 100644 --- 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)