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101 lines
3.1 KiB
101 lines
3.1 KiB
7 years ago
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diff -up util-linux-2.23.2/libblkid/src/partitions/gpt.c.kzak util-linux-2.23.2/libblkid/src/partitions/gpt.c
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--- util-linux-2.23.2/libblkid/src/partitions/gpt.c.kzak 2013-07-30 10:39:26.206738239 +0200
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+++ util-linux-2.23.2/libblkid/src/partitions/gpt.c 2014-01-23 11:06:17.364011293 +0100
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@@ -156,13 +156,15 @@ static int last_lba(blkid_probe pr, uint
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* Note that the PMBR detection is optional (enabled by default) and could be
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* disabled by BLKID_PARTS_FOPCE_GPT flag (see also blkid_paertitions_set_flags()).
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*/
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-static int is_pmbr_valid(blkid_probe pr)
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+static int is_pmbr_valid(blkid_probe pr, int *has)
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{
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int flags = blkid_partitions_get_flags(pr);
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unsigned char *data;
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struct dos_partition *p;
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int i;
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+ if (has)
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+ *has = 0;
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if (flags & BLKID_PARTS_FORCE_GPT)
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goto ok; /* skip PMBR check */
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@@ -182,6 +184,8 @@ static int is_pmbr_valid(blkid_probe pr)
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failed:
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return 0;
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ok:
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+ if (has)
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+ *has = 1;
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return 1;
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}
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@@ -305,7 +309,7 @@ static int probe_gpt_pt(blkid_probe pr,
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if (last_lba(pr, &lastlba))
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goto nothing;
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- if (!is_pmbr_valid(pr))
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+ if (!is_pmbr_valid(pr, NULL))
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goto nothing;
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h = get_gpt_header(pr, &hdr, &e, (lba = GPT_PRIMARY_LBA), lastlba);
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@@ -410,3 +414,39 @@ const struct blkid_idinfo gpt_pt_idinfo
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.magics = BLKID_NONE_MAGIC
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};
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+
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+
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+/* probe for *alone* protective MBR */
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+static int probe_pmbr_pt(blkid_probe pr,
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+ const struct blkid_idmag *mag __attribute__((__unused__)))
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+{
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+ int has = 0;
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+ struct gpt_entry *e;
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+ uint64_t lastlba = 0;
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+ struct gpt_header hdr;
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+
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+ if (last_lba(pr, &lastlba))
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+ goto nothing;
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+
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+ is_pmbr_valid(pr, &has);
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+ if (!has)
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+ goto nothing;
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+
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+ if (!get_gpt_header(pr, &hdr, &e, GPT_PRIMARY_LBA, lastlba) &&
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+ !get_gpt_header(pr, &hdr, &e, lastlba, lastlba))
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+ return 0;
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+nothing:
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+ return 1;
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+}
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+
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+const struct blkid_idinfo pmbr_pt_idinfo =
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+{
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+ .name = "PMBR",
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+ .probefunc = probe_pmbr_pt,
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+ .magics =
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+ {
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+ { .magic = "\x55\xAA", .len = 2, .sboff = 510 },
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+ { NULL }
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+ }
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+};
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+
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diff -up util-linux-2.23.2/libblkid/src/partitions/partitions.c.kzak util-linux-2.23.2/libblkid/src/partitions/partitions.c
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--- util-linux-2.23.2/libblkid/src/partitions/partitions.c.kzak 2013-07-30 10:39:26.207738249 +0200
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+++ util-linux-2.23.2/libblkid/src/partitions/partitions.c 2014-01-23 11:06:17.364011293 +0100
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@@ -125,6 +125,7 @@ static const struct blkid_idinfo *idinfo
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&sun_pt_idinfo,
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&dos_pt_idinfo,
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&gpt_pt_idinfo,
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+ &pmbr_pt_idinfo, /* always after GPT */
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&mac_pt_idinfo,
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&ultrix_pt_idinfo,
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&bsd_pt_idinfo,
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diff -up util-linux-2.23.2/libblkid/src/partitions/partitions.h.kzak util-linux-2.23.2/libblkid/src/partitions/partitions.h
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--- util-linux-2.23.2/libblkid/src/partitions/partitions.h.kzak 2013-07-30 10:39:26.208738259 +0200
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+++ util-linux-2.23.2/libblkid/src/partitions/partitions.h 2014-01-23 11:06:17.364011293 +0100
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@@ -59,6 +59,7 @@ extern const struct blkid_idinfo mac_pt_
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extern const struct blkid_idinfo dos_pt_idinfo;
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extern const struct blkid_idinfo minix_pt_idinfo;
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extern const struct blkid_idinfo gpt_pt_idinfo;
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+extern const struct blkid_idinfo pmbr_pt_idinfo;
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extern const struct blkid_idinfo ultrix_pt_idinfo;
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#endif /* BLKID_PARTITIONS_H */
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