From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f175.google.com ([209.85.212.175]:49477 "EHLO mail-wi0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753399AbaEaXst (ORCPT ); Sat, 31 May 2014 19:48:49 -0400 Received: by mail-wi0-f175.google.com with SMTP id f8so2858432wiw.2 for ; Sat, 31 May 2014 16:48:48 -0700 (PDT) From: Philip Worrall To: linux-btrfs@vger.kernel.org Cc: Philip Worrall Subject: [PATCH 5/8] Btrfs: Add feature flags for LZ4 support Date: Sat, 31 May 2014 23:48:33 +0000 Message-Id: <1401580116-10458-6-git-send-email-philip.worrall@googlemail.com> In-Reply-To: <1401580116-10458-1-git-send-email-philip.worrall@googlemail.com> References: <1401580116-10458-1-git-send-email-philip.worrall@googlemail.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: Add various feature flags for LZ4 so that older kernels refuse to mount btrfs filesystems that have been used with LZ4 Signed-off-by: Philip Worrall --- fs/btrfs/ctree.h | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index d8a669e..b5118cfa 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -523,6 +523,7 @@ struct btrfs_super_block { #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7) #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8) #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9) +#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZ4 (1ULL << 10) #define BTRFS_FEATURE_COMPAT_SUPP 0ULL #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL @@ -540,7 +541,8 @@ struct btrfs_super_block { BTRFS_FEATURE_INCOMPAT_RAID56 | \ BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ - BTRFS_FEATURE_INCOMPAT_NO_HOLES) + BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ + BTRFS_FEATURE_INCOMPAT_COMPRESS_LZ4) #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) @@ -709,8 +711,10 @@ enum btrfs_compression_type { BTRFS_COMPRESS_NONE = 0, BTRFS_COMPRESS_ZLIB = 1, BTRFS_COMPRESS_LZO = 2, - BTRFS_COMPRESS_TYPES = 2, - BTRFS_COMPRESS_LAST = 3, + BTRFS_COMPRESS_LZ4 = 3, + BTRFS_COMPRESS_TYPES = 3, + BTRFS_COMPRESS_LAST = 4, + }; struct btrfs_inode_item { -- 1.9.1