Author: pjd
Date: Fri Sep 24 19:31:08 2010
New Revision: 213133
URL: http://svn.freebsd.org/changeset/base/213133
Log:
Add three GPT attributes:
GPT_ENT_ATTR_BOOTME - this is bootable partition
GPT_ENT_ATTR_BOOTONCE - try to boot only once from this partition
GPT_ENT_ATTR_BOOTFAILED - set this flag if we cannot boot from partition
containing GPT_ENT_ATTR_BOOTONCE flag; note that if we cannot
boot from partition that contains only GPT_ENT_ATTR_BOOTME flag,
the GPT_ENT_ATTR_BOOTFAILED flag won't be set
According to wikipedia Microsoft TechNet says that attributes are divided into
two halves: the lower 4 bytes representing partition independent attributes,
and the upper 4 bytes are partition type dependent. Microsoft is already using
bits 60 (read-only), 62 (hidden) and 63 (do not automount) and I'd like to not
collide with those, so we are using bit 59 (bootme), 58 (bootonce) and 57
(bootfailed).
Reviewed by: arch (Message-ID: <20100917234542.ge1...@garage.freebsd.pl>)
MFC after: 2 weeks
Modified:
head/sys/sys/gpt.h
Modified: head/sys/sys/gpt.h
==============================================================================
--- head/sys/sys/gpt.h Fri Sep 24 19:30:34 2010 (r213132)
+++ head/sys/sys/gpt.h Fri Sep 24 19:31:08 2010 (r213133)
@@ -65,6 +65,9 @@ struct gpt_ent {
uint64_t ent_lba_end;
uint64_t ent_attr;
#define GPT_ENT_ATTR_PLATFORM (1ULL << 0)
+#define GPT_ENT_ATTR_BOOTME (1ULL << 59)
+#define GPT_ENT_ATTR_BOOTONCE (1ULL << 58)
+#define GPT_ENT_ATTR_BOOTFAILED (1ULL << 57)
uint16_t ent_name[36]; /* UTF-16. */
};
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