65 lines
2.5 KiB
Diff
65 lines
2.5 KiB
Diff
diff -up util-linux-2.22.2/libblkid/src/blkidP.h.kzak util-linux-2.22.2/libblkid/src/blkidP.h
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--- util-linux-2.22.2/libblkid/src/blkidP.h.kzak 2012-12-12 21:04:47.902355093 +0100
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+++ util-linux-2.22.2/libblkid/src/blkidP.h 2013-02-20 10:54:33.885606609 +0100
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@@ -224,6 +224,9 @@ struct blkid_struct_probe
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/* private per-probing flags */
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#define BLKID_PROBE_FL_IGNORE_PT (1 << 1) /* ignore partition table */
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+#define BLKID_PROBE_FL_IGNORE_BACKUP (1 << 2) /* ignore backup superblocks or PT */
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+
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+extern int blkid_probe_ignore_backup(blkid_probe pr);
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extern blkid_probe blkid_clone_probe(blkid_probe parent);
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extern blkid_probe blkid_probe_get_wholedisk_probe(blkid_probe pr);
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diff -up util-linux-2.22.2/libblkid/src/probe.c.kzak util-linux-2.22.2/libblkid/src/probe.c
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--- util-linux-2.22.2/libblkid/src/probe.c.kzak 2012-12-12 21:04:47.903355101 +0100
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+++ util-linux-2.22.2/libblkid/src/probe.c 2013-02-20 11:02:48.525255696 +0100
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@@ -810,6 +810,7 @@ int blkid_probe_get_idmag(blkid_probe pr
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static inline void blkid_probe_start(blkid_probe pr)
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{
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if (pr) {
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+ DBG(DEBUG_LOWPROBE, printf("%p: start probe\n", pr));
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pr->cur_chain = NULL;
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pr->prob_flags = 0;
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blkid_probe_set_wiper(pr, 0, 0);
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@@ -819,6 +820,7 @@ static inline void blkid_probe_start(blk
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static inline void blkid_probe_end(blkid_probe pr)
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{
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if (pr) {
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+ DBG(DEBUG_LOWPROBE, printf("%p: end probe\n", pr));
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pr->cur_chain = NULL;
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pr->prob_flags = 0;
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blkid_probe_set_wiper(pr, 0, 0);
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@@ -1057,6 +1059,8 @@ int blkid_do_safeprobe(blkid_probe pr)
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blkid_probe_start(pr);
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+ pr->prob_flags |= BLKID_PROBE_FL_IGNORE_BACKUP;
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+
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for (i = 0; i < BLKID_NCHAINS; i++) {
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struct blkid_chain *chn;
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@@ -1679,3 +1683,7 @@ void blkid_probe_use_wiper(blkid_probe p
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}
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}
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+int blkid_probe_ignore_backup(blkid_probe pr)
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+{
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+ return pr && (pr->prob_flags & BLKID_PROBE_FL_IGNORE_BACKUP);
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+}
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diff -up util-linux-2.22.2/libblkid/src/superblocks/btrfs.c.kzak util-linux-2.22.2/libblkid/src/superblocks/btrfs.c
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--- util-linux-2.22.2/libblkid/src/superblocks/btrfs.c.kzak 2013-02-20 10:54:03.422381876 +0100
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+++ util-linux-2.22.2/libblkid/src/superblocks/btrfs.c 2013-02-20 10:54:33.886606616 +0100
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@@ -63,6 +63,11 @@ static int probe_btrfs(blkid_probe pr, c
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{
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struct btrfs_super_block *bfs;
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+ if (mag->kboff > 64 && blkid_probe_ignore_backup(pr)) {
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+ DBG(DEBUG_LOWPROBE, printf("btrfs: found backup superblock, ignore\n"));
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+ return 1;
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+ }
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+
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bfs = blkid_probe_get_sb(pr, mag, struct btrfs_super_block);
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if (!bfs)
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return -1;
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