File Pass-md_index-information-to-detect_md.patch of Package drbd-utils.7298

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File Pass-md_index-information-to-detect_md.patch of Package drbd-utils.7298

detect_md() assumes that the metadata index format is
DRBD_MD_INDEX_FLEX_INT, but in fact it can also be
DRBD_MD_INDEX_FLEX_EXT.

[lge: Actually, it could even be old-style indexed fixed size meta data,
but that can be fixed an other day, or worked around with dump/restore.

Thanks for noticing and fixing a regression when trying to detect and
"convert" external meta data.  We introduced said regression likely in
late 2011, even before 8.4 came out.]

Signed-off-by: Kristoffer Grönlund <krig@koru.se>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
---
 user/shared/drbdmeta.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/user/shared/drbdmeta.c b/user/shared/drbdmeta.c
index 649076e..2a79264 100644
--- a/user/shared/drbdmeta.c
+++ b/user/shared/drbdmeta.c
@@ -4348,25 +4348,25 @@ void check_for_existing_data(struct format *cfg)
 }
 
 /* tries to guess what is in the on_disk_buffer */
-enum md_format detect_md(struct md_cpu *md, const uint64_t ll_size)
+enum md_format detect_md(struct md_cpu *md, const uint64_t ll_size, int index_format)
 {
 	struct md_cpu md_test;
 	enum md_format have = DRBD_UNKNOWN;
 
 	md_disk_07_to_cpu(&md_test, (struct md_on_disk_07*)on_disk_buffer);
-	if (is_valid_md(DRBD_V07, &md_test, DRBD_MD_INDEX_FLEX_INT, ll_size)) {
+	if (is_valid_md(DRBD_V07, &md_test, index_format, ll_size)) {
 		have = DRBD_V07;
 		*md = md_test;
 	}
 
 	md_disk_08_to_cpu(&md_test, (struct md_on_disk_08*)on_disk_buffer);
-	if (is_valid_md(DRBD_V08, &md_test, DRBD_MD_INDEX_FLEX_INT, ll_size)) {
+	if (is_valid_md(DRBD_V08, &md_test, index_format, ll_size)) {
 		have = DRBD_V08;
 		*md = md_test;
 	}
 
 	md_disk_09_to_cpu(&md_test, (struct meta_data_on_disk_9*)on_disk_buffer);
-	if (is_valid_md(DRBD_V09, &md_test, DRBD_MD_INDEX_FLEX_INT, ll_size)) {
+	if (is_valid_md(DRBD_V09, &md_test, index_format, ll_size)) {
 		have = DRBD_V09;
 		*md = md_test;
 	}
@@ -4406,7 +4406,7 @@ void check_internal_md_flavours(struct format * cfg) {
 
 	if (have == DRBD_UNKNOWN) {
 		PREAD(cfg, on_disk_buffer, 4096, flex_offset);
-		have = detect_md(&md_now, cfg->bd_size);
+		have = detect_md(&md_now, cfg->bd_size, DRBD_MD_INDEX_FLEX_INT);
 	}
 
 	if (have == DRBD_UNKNOWN)
@@ -4515,7 +4515,7 @@ void check_external_md_flavours(struct format * cfg) {
 	}
 
 	PREAD(cfg, on_disk_buffer, 4096, cfg->md_offset);
-	have = detect_md(&md_now, cfg->bd_size);
+	have = detect_md(&md_now, cfg->bd_size, DRBD_MD_INDEX_FLEX_EXT);
 
 	if (have == DRBD_UNKNOWN)
 		return;
-- 
1.8.1.4

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File Pass-md_index-information-to-detect_md.patch of Package drbd-utils.7298

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