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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2011-02-28 13:41:11 +0900 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2011-03-02 09:55:18 +0900 |
| commit | 72746ac643928f6c3113b5aa783d8ea1b13949d2 (patch) | |
| tree | c1d151eae5e963dd3f57079e0287c2259257bc29 /fs | |
| parent | dd9c1549edef02290edced639f67b54a25abbe0e (diff) | |
| download | blackbird-op-linux-72746ac643928f6c3113b5aa783d8ea1b13949d2.tar.gz blackbird-op-linux-72746ac643928f6c3113b5aa783d8ea1b13949d2.zip | |
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')
| -rw-r--r-- | fs/nilfs2/segment.c | 3 |
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 */ } |
