[Ocfs2-tools-devel] [PATCH 1/7] ocfs2-tools: Import the latest ocfs2_fs.h

[Joel Becker]

The extended slot map is defined in the latest version of ocfs2_fs.h.  In
addition, it defines a proper data structure for the old slot map.

This is a straight import from te kernel sources.  The only modification
is to remove OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP from the SUPPORTED
bitmask.  It will be added back when the tools support is complete.

Signed-off-by: Joel Becker <joel.becker at oracle.com>
---
 libocfs2/include/ocfs2_fs.h |   41 ++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 40 insertions(+), 1 deletions(-)

diff --git a/libocfs2/include/ocfs2_fs.h b/libocfs2/include/ocfs2_fs.h
index cfaf28f..5d7f50c 100644
--- a/libocfs2/include/ocfs2_fs.h
+++ b/libocfs2/include/ocfs2_fs.h
@@ -87,7 +87,8 @@
 
 #define OCFS2_FEATURE_COMPAT_SUPP	OCFS2_FEATURE_COMPAT_BACKUP_SB
 #define OCFS2_FEATURE_INCOMPAT_SUPP	(OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \
-					 | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
+					 | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC \
+					 | OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
 #define OCFS2_FEATURE_RO_COMPAT_SUPP	OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
 
 /*
@@ -124,6 +125,10 @@
 /* Support for data packed into inode blocks */
 #define OCFS2_FEATURE_INCOMPAT_INLINE_DATA	0x0040
 
+/* Support for the extended slot map */
+#define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100
+
+
 /*
  * backup superblock flag is used to indicate that this volume
  * has backup superblocks.
@@ -452,6 +457,40 @@ struct ocfs2_extent_block
 };
 
 /*
+ * On disk slot map for OCFS2.  This defines the contents of the "slot_map"
+ * system file.  A slot is valid if it contains a node number >= 0.  The
+ * value -1 (0xFFFF) is OCFS2_INVALID_SLOT.  This marks a slot empty.
+ */
+struct ocfs2_slot_map {
+/*00*/	__le16 sm_slots[0];
+/*
+ * Actual on-disk size is one block.  OCFS2_MAX_SLOTS is 255,
+ * 255 * sizeof(__le16) == 512B, within the 512B block minimum blocksize.
+ */
+};
+
+struct ocfs2_extended_slot {
+/*00*/	__u8	es_valid;
+	__u8	es_reserved1[3];
+	__le32	es_node_num;
+/*10*/
+};
+
+/*
+ * The extended slot map, used when OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP
+ * is set.  It separates out the valid marker from the node number, and
+ * has room to grow.  Unlike the old slot map, this format is defined by
+ * i_size.
+ */
+struct ocfs2_slot_map_extended {
+/*00*/	struct ocfs2_extended_slot se_slots[0];
+/*
+ * Actual size is i_size of the slot_map system file.  It should
+ * match s_max_slots * sizeof(struct ocfs2_extended_slot)
+ */
+};
+
+/*
  * On disk superblock for OCFS2
  * Note that it is contained inside an ocfs2_dinode, so all offsets
  * are relative to the start of ocfs2_dinode.id2.
-- 
1.5.2.2