From: Kirill Tkhai <ktk...@virtuozzo.com> Prohibit a notpriviliged user to reach balloon. Prohibit everything to unlink it.
https://jira.sw.ru/browse/PSBM-133811 Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com> Feature: fs/xfs: fast online shrink support --- fs/xfs/xfs_inode.c | 4 ++++ fs/xfs/xfs_iops.c | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 5ca561634164..9065e6d373cc 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -666,6 +666,10 @@ xfs_lookup( if (error) goto out_unlock; + error = -EPERM; + if (unlikely(inum == READ_ONCE(dp->i_mount->m_balloon_ino))) + goto out_free_name; + error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); if (error) goto out_free_name; diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index ca1f445dc8c2..12e4dd456e6d 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -382,6 +382,10 @@ xfs_vn_unlink( struct xfs_name name; int error; + if (unlikely(d_inode(dentry)->i_ino == + READ_ONCE(XFS_I(dir)->i_mount->m_balloon_ino))) + return -EPERM; + xfs_dentry_to_name(&name, dentry); error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry))); -- 2.43.5 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
