On Sat, 20 Feb 2010 19:47:49 +0900, Jiro SEKIBA <j...@unicus.jp> wrote:
> Hi,
>
> This adds reader's lock for the_nilfs->cno in nilfs_ioctl_sync,
> for the_nilfs->cno should be proctected by segctor_sem when reading.
>
> Signed-off-by: Jiro SEKIBA <j...@unicus.jp>
> ---
> fs/nilfs2/ioctl.c | 6 +++++-
> 1 files changed, 5 insertions(+), 1 deletions(-)
>
> diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
> index d6b2b83..32d5103 100644
> --- a/fs/nilfs2/ioctl.c
> +++ b/fs/nilfs2/ioctl.c
> @@ -575,13 +575,17 @@ static int nilfs_ioctl_sync(struct inode *inode, struct
> file *filp,
> {
> __u64 cno;
> int ret;
> + struct the_nilfs *nilfs;
>
> ret = nilfs_construct_segment(inode->i_sb);
> if (ret < 0)
> return ret;
>
> if (argp != NULL) {
> - cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1;
> + nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
> + down_read(&nilfs->ns_segctor_sem);
> + cno = nilfs->ns_cno - 1;
> + up_read(&nilfs->ns_segctor_sem);
> if (copy_to_user(argp, &cno, sizeof(cno)))
> return -EFAULT;
> }
> --
> 1.5.6.5
Right, this should be applied.
Thanks.
Ryusuke Konishi
--
To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
