From: Jeff Mahoney <je...@suse.com>
Commit 324d4c1857a (btrfs-progs: convert: Add larger device support)
introduced new dependencies on the 64-bit API provided by e2fsprogs.
That API was introduced in v1.42 (along with bigalloc).
This patch maps the following to their equivalents in e2fsprogs < 1.42.
- ext2fs_get_block_bitmap_range2
- ext2fs_inode_data_blocks2
- ext2fs_read_ext_attr2
Since we need to detect and define EXT2_FLAG_64BITS for compatibilty
anyway, it makes sense to use that to detect the older e2fsprogs instead
of defining a new flag ourselves.
Signed-off-by: Jeff Mahoney <je...@suse.com>
---
configure.ac | 6 +-----
convert/source-ext2.h | 12 +++++++++++-
2 files changed, 12 insertions(+), 6 deletions(-)
diff --git a/configure.ac b/configure.ac
index af13a95..2dea1c6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -140,11 +140,7 @@ BTRFSCONVERT_EXT2=0
BTRFSCONVERT_REISERFS=0
if test "x$enable_convert" = xyes; then
if test "x$with_convert" = "xauto" || echo "$with_convert" | grep -q
"ext2"; then
- PKG_CHECK_MODULES(EXT2FS, [ext2fs >= 1.42],,
- [PKG_CHECK_MODULES(EXT2FS, [ext2fs],
- [AC_DEFINE([HAVE_OLD_E2FSPROGS], [1],
- [E2fsprogs does not support
BIGALLOC])]
- )])
+ PKG_CHECK_MODULES(EXT2FS, [ext2fs])
PKG_CHECK_MODULES(COM_ERR, [com_err])
convertfs="${convertfs:+$convertfs,}ext2"
BTRFSCONVERT_EXT2=1
diff --git a/convert/source-ext2.h b/convert/source-ext2.h
index 80833b2..c321412 100644
--- a/convert/source-ext2.h
+++ b/convert/source-ext2.h
@@ -33,8 +33,18 @@
* BIGALLOC.
* Unlike normal RO compat flag, BIGALLOC affects how e2fsprogs check used
* space, and btrfs-convert heavily relies on it.
+ *
+ * e2fsprogs 1.42 also introduced the 64-bit API. Any file system
+ * that requires it will have EXT4_FEATURE_INCOMPAT_64BIT set and
+ * will fail to open with earlier releases. We can map it to the
+ * older API without risk of corruption.
*/
-#ifdef HAVE_OLD_E2FSPROGS
+#ifndef EXT2_FLAG_64BITS
+#define EXT2_FLAG_64BITS (0)
+#define ext2fs_get_block_bitmap_range2 ext2fs_get_block_bitmap_range
+#define ext2fs_inode_data_blocks2 ext2fs_inode_data_blocks
+#define ext2fs_read_ext_attr2 ext2fs_read_ext_attr
+#define ext2fs_blocks_count(s) ((s)->s_blocks_count)
#define EXT2FS_CLUSTER_RATIO(fs) (1)
#define EXT2_CLUSTERS_PER_GROUP(s) (EXT2_BLOCKS_PER_GROUP(s))
#define EXT2FS_B2C(fs, blk) (blk)
--
1.7.12.4
--
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