On 2011å04æ18æ 17:01, liubo Wrote: > On 04/18/2011 04:41 PM, Coly Li wrote: >> On 2011å04æ18æ 15:37, liubo Wrote: >>> Signed-off-by: Liu Bo <liubo2009@xxxxxxxxxxxxxx> >>> --- >>> debugfs/htree.c | 2 +- >>> e2fsck/pass1.c | 22 +++++++++++----------- >>> e2fsck/pass2.c | 2 +- >>> e2fsck/pass4.c | 2 +- >>> e2fsck/rehash.c | 4 ++-- >>> ext2ed/inode_com.c | 14 +++++++------- >>> lib/e2p/fgetflags.c | 6 +++--- >>> lib/e2p/fsetflags.c | 6 +++--- >>> lib/e2p/getflags.c | 6 +++--- >>> lib/e2p/pf.c | 34 +++++++++++++++++----------------- >>> lib/e2p/setflags.c | 6 +++--- >>> lib/ext2fs/ext2_fs.h | 44 ++++++++++++++++++++++---------------------- >>> lib/ext2fs/link.c | 4 ++-- >>> lib/ext2fs/mkjournal.c | 2 +- >>> misc/chattr.c | 26 +++++++++++++------------- >>> misc/tune2fs.c | 2 +- >>> 16 files changed, 91 insertions(+), 91 deletions(-) >>> [snip] >> >> Hi Bo, >> >> Could you please to introduce the motivation of this patch set a little bit more? Thanks. >> > > Hi Li, > > Since we want to control COW and compression attribute on a per file or per directory basis, > and find that the generic command "chattr" is the "Mr Right". > > Currently only btrfs supports both, of course. > > With these patches, we can do the followings: > > c: compress > C: nocow > > set compress & nocow: > > # ./misc/chattr -V +c +C /mnt/btrfs/dir/ > chattr 1.41.14 (22-Dec-2010) > Flags of /mnt/btrfs/dir/ set as --------c------C > > # ./misc/lsattr -d /mnt/btrfs/dir/ > --------c------C /mnt/btrfs/dir/ > Thank you for the explaining. Now I understand this patch set is to make chattr of e2fsprogs to support a (currently-only) btrfs feature. It seems chattr and lsattr is not an ext[234] only utilities any more... -- Coly Li -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
