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Message-Id: <1379317284-20311-1-git-send-email-bo.li.liu@oracle.com> Date: Mon, 16 Sep 2013 15:41:24 +0800 From: Liu Bo <bo.li.liu@...cle.com> To: linux-ext4@...r.kernel.org Cc: linux-btrfs@...r.kernel.org, dsterba@...e.cz, jeff.liu@...cle.com Subject: [PATCH] E2fsprogs: introduce FIEMAP_EXTENT_SHARED support Filesystems, such as ocfs2 and btrfs, support shared space that is shared among different files, so the upstream introduces flag FIEMAP_EXTENT_SHARED for that. With this, e2fsprogs's filefrag also support the flag. Signed-off-by: Liu Bo <bo.li.liu@...cle.com> --- lib/ext2fs/fiemap.h | 2 ++ misc/filefrag.c | 2 ++ 2 files changed, 4 insertions(+), 0 deletions(-) diff --git a/lib/ext2fs/fiemap.h b/lib/ext2fs/fiemap.h index 30bf555..895cd0b 100644 --- a/lib/ext2fs/fiemap.h +++ b/lib/ext2fs/fiemap.h @@ -64,5 +64,7 @@ struct fiemap { #define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively * support extents. Result * merged for efficiency. */ +#define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other + * files. */ #endif /* _LINUX_FIEMAP_H */ diff --git a/misc/filefrag.c b/misc/filefrag.c index 35b3544..31dfb64 100644 --- a/misc/filefrag.c +++ b/misc/filefrag.c @@ -165,6 +165,8 @@ static void print_extent_info(struct fiemap_extent *fm_extent, int cur_ex, strcat(flags, "unwritten,"); if (fm_extent->fe_flags & FIEMAP_EXTENT_MERGED) strcat(flags, "merged,"); + if (fm_extent->fe_flags & FIEMAP_EXTENT_SHARED) + strcat(flags, "shared,"); if (fm_extent->fe_logical + fm_extent->fe_length >= (__u64) st->st_size) strcat(flags, "eof,"); -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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