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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-02-28 07:41:11 +0300
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-03-02 03:55:18 +0300
commit72746ac643928f6c3113b5aa783d8ea1b13949d2 (patch)
treec1d151eae5e963dd3f57079e0287c2259257bc29 /fs/nilfs2/segment.c
parentdd9c1549edef02290edced639f67b54a25abbe0e (diff)
downloadlinux-72746ac643928f6c3113b5aa783d8ea1b13949d2.tar.xz
nilfs2: fix regression that i-flag is not set on changeless checkpoints
According to the report from Jiro SEKIBA titled "regression in 2.6.37?" (Message-Id: <8739n8vs1f.wl%jir@sekiba.com>), on 2.6.37 and later kernels, lscp command no longer displays "i" flag on checkpoints that snapshot operations or garbage collection created. This is a regression of nilfs2 checkpointing function, and it's critical since it broke behavior of a part of nilfs2 applications. For instance, snapshot manager of TimeBrowse gets to create meaningless snapshots continuously; snapshot creation triggers another checkpoint, but applications cannot distinguish whether the new checkpoint contains meaningful changes or not without the i-flag. This patch fixes the regression and brings that application behavior back to normal. Reported-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Tested-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Tested-by: Jiro SEKIBA <jir@unicus.jp> Cc: stable <stable@kernel.org> [2.6.37]
Diffstat (limited to 'fs/nilfs2/segment.c')
-rw-r--r--fs/nilfs2/segment.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 55ebae5c7f39..2de9f636792a 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -430,7 +430,8 @@ static void nilfs_segctor_begin_finfo(struct nilfs_sc_info *sci,
nilfs_segctor_map_segsum_entry(
sci, &sci->sc_binfo_ptr, sizeof(struct nilfs_finfo));
- if (inode->i_sb && !test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags))
+ if (NILFS_I(inode)->i_root &&
+ !test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags))
set_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags);
/* skip finfo */
}