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[4/4] design: update metadump v2 format to reflect rt dumps

Message ID 173102187933.4143993.5785776084169738258.stgit@frogsfrogsfrogs (mailing list archive)
State New
Headers show
Series [1/4] design: move discussion of realtime volumes to a separate section | expand

Commit Message

Darrick J. Wong Nov. 7, 2024, 11:27 p.m. UTC 
From: Darrick J. Wong <djwong@kernel.org>

Update the metadump v2 format documentation to add realtime device
dumps.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 design/XFS_Filesystem_Structure/metadump.asciidoc |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
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Patch

diff --git a/design/XFS_Filesystem_Structure/metadump.asciidoc b/design/XFS_Filesystem_Structure/metadump.asciidoc
index a32d6423ea6e75..226622c0d2f20e 100644
--- a/design/XFS_Filesystem_Structure/metadump.asciidoc
+++ b/design/XFS_Filesystem_Structure/metadump.asciidoc
@@ -119,7 +119,16 @@  Dump contains external log contents.
 |=====
 
 *xmh_incompat_flags*::
-Must be zero.
+A combination of the following flags:
+
+.Metadump v2 incompat flags
+[options="header"]
+|=====
+| Flag				| Description
+| +XFS_MD2_INCOMPAT_RTDEVICE+	|
+Dump contains realtime device contents.
+
+|=====
 
 *xmh_reserved*::
 Must be zero.
@@ -143,6 +152,7 @@  Bits 55-56 determine the device from which the metadata dump data was extracted.
 | Value		| Description
 | 0		| Data device
 | 1		| External log
+| 2		| Realtime device
 |=====
 
 The lower 54 bits determine the device address from which the dump data was