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[PATCH 2/6] e2fsprogs: fix endian handling of ext3_extent_header
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This turned up when trying to resize a filesystem containing
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a file with many extents on PPC64.
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Fix all locations where ext3_extent_header members aren't
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handled in an endian-safe manner.
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(Note: inline data portion removed for rhel7 application)
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Signed-off-by: Eric Sandeen <sandeen@redhat.com>
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Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
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---
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lib/ext2fs/ext3_extents.h | 15 ++++++++++-----
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2 files changed, 11 insertions(+), 6 deletions(-)
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diff --git a/lib/ext2fs/ext3_extents.h b/lib/ext2fs/ext3_extents.h
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index 4163436..a18d705 100644
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--- a/lib/ext2fs/ext3_extents.h
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+++ b/lib/ext2fs/ext3_extents.h
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@@ -106,15 +106,20 @@ struct ext3_ext_path {
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((struct ext3_extent_idx *) (((char *) (__hdr__)) + \
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sizeof(struct ext3_extent_header)))
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#define EXT_HAS_FREE_INDEX(__path__) \
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- ((__path__)->p_hdr->eh_entries < (__path__)->p_hdr->eh_max)
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+ (ext2fs_le16_to_cpu((__path__)->p_hdr->eh_entries) < \
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+ ext2fs_le16_to_cpu((__path__)->p_hdr->eh_max))
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#define EXT_LAST_EXTENT(__hdr__) \
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- (EXT_FIRST_EXTENT((__hdr__)) + (__hdr__)->eh_entries - 1)
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+ (EXT_FIRST_EXTENT((__hdr__)) + \
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+ ext2fs_le16_to_cpu((__hdr__)->eh_entries) - 1)
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#define EXT_LAST_INDEX(__hdr__) \
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- (EXT_FIRST_INDEX((__hdr__)) + (__hdr__)->eh_entries - 1)
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+ (EXT_FIRST_INDEX((__hdr__)) + \
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+ ext2fs_le16_to_cpu((__hdr__)->eh_entries) - 1)
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#define EXT_MAX_EXTENT(__hdr__) \
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- (EXT_FIRST_EXTENT((__hdr__)) + (__hdr__)->eh_max - 1)
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+ (EXT_FIRST_EXTENT((__hdr__)) + \
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+ ext2fs_le16_to_cpu((__hdr__)->eh_max) - 1)
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#define EXT_MAX_INDEX(__hdr__) \
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- (EXT_FIRST_INDEX((__hdr__)) + (__hdr__)->eh_max - 1)
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+ (EXT_FIRST_INDEX((__hdr__)) + \
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+ ext2fs_le16_to_cpu((__hdr__)->eh_max) - 1)
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#endif /* _LINUX_EXT3_EXTENTS */
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