On Mon, Aug 14, 2017 at 03:07:03PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
>
> Way back when we established inode block-map redo log items, it was
> discovered that we needed to prevent the VFS from evicting inodes during
> log recovery because any given inode might be have bmap redo items to
> replay even if the inode has no link count and is ultimately deleted,
> and any eviction of an unlinked inode causes the inode to be truncated
> and freed too early.
>
> To make this possible, we set MS_ACTIVE so that inodes would not be torn
> down immediately upon release. Unfortunately, this also results in the
> quota inodes not being released at all if a later part of the mount
> process should fail, because we never reclaim the inodes. So, set
> MS_ACTIVE right before we do the last part of log recovery and clear it
> immediately after we finish the log recovery so that everything
> will be torn down properly if we abort the mount.
>
> Fixes: 17c12bcd30 ("xfs: when replaying bmap operations, don't let unlinked inodes get reaped")
> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> ---
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
> fs/xfs/xfs_log.c | 11 +++++++++++
> fs/xfs/xfs_mount.c | 10 ----------
> 2 files changed, 11 insertions(+), 10 deletions(-)
>
>
> diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
> index 0053bcf..4ebd0ba 100644
> --- a/fs/xfs/xfs_log.c
> +++ b/fs/xfs/xfs_log.c
> @@ -749,9 +749,20 @@ xfs_log_mount_finish(
> return 0;
> }
>
> + /*
> + * During the second phase of log recovery, we need iget and
> + * iput to behave like they do for an active filesystem.
> + * xfs_fs_drop_inode needs to be able to prevent the deletion
> + * of inodes before we're done replaying log items on those
> + * inodes. Turn it off immediately after recovery finishes
> + * so that we don't leak the quota inodes if subsequent mount
> + * activities fail.
> + */
> + mp->m_super->s_flags |= MS_ACTIVE;
> error = xlog_recover_finish(mp->m_log);
> if (!error)
> xfs_log_work_queue(mp);
> + mp->m_super->s_flags &= ~MS_ACTIVE;
>
> return error;
> }
> diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
> index 40d4e8b..151a82db 100644
> --- a/fs/xfs/xfs_mount.c
> +++ b/fs/xfs/xfs_mount.c
> @@ -945,15 +945,6 @@ xfs_mountfs(
> }
>
> /*
> - * During the second phase of log recovery, we need iget and
> - * iput to behave like they do for an active filesystem.
> - * xfs_fs_drop_inode needs to be able to prevent the deletion
> - * of inodes before we're done replaying log items on those
> - * inodes.
> - */
> - mp->m_super->s_flags |= MS_ACTIVE;
> -
> - /*
> * Finish recovering the file system. This part needed to be delayed
> * until after the root and real-time bitmap inodes were consistently
> * read in.
> @@ -1028,7 +1019,6 @@ xfs_mountfs(
> out_quota:
> xfs_qm_unmount_quotas(mp);
> out_rtunmount:
> - mp->m_super->s_flags &= ~MS_ACTIVE;
> xfs_rtunmount_inodes(mp);
> out_rele_rip:
> IRELE(rip);
>
> --
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