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[2/3] btrfs-progs: add getters for ioctl search_header

Message ID 99993863d5906bb4987502ea08411fab56b64f35.1462291729.git.dsterba@suse.com (mailing list archive)
State Accepted
Headers show

Commit Message

David Sterba May 3, 2016, 4:12 p.m. UTC 
The search header is usually accessed in an unaligned way, we could
trigger errors (SIGBUS) on architectures that do not support that.

Signed-off-by: David Sterba <dsterba@suse.com>
---
 ctree.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
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Patch

diff --git a/ctree.h b/ctree.h
index 2da6f7786a78..13ed05052301 100644
--- a/ctree.h
+++ b/ctree.h
@@ -2196,6 +2196,32 @@  static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
        return btrfs_item_size(eb, e) - offset;
 }
 
+/* struct btrfs_ioctl_search_header */
+static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
+{
+	return get_unaligned_64(&sh->transid);
+}
+
+static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
+{
+	return get_unaligned_64(&sh->objectid);
+}
+
+static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
+{
+	return get_unaligned_64(&sh->offset);
+}
+
+static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
+{
+	return get_unaligned_32(&sh->type);
+}
+
+static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
+{
+	return get_unaligned_32(&sh->len);
+}
+
 /* this returns the number of file bytes represented by the inline item.
  * If an item is compressed, this is the uncompressed size
  */