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ceph: update ceph_dentry_info::lease_session when necessary 

Current code does not update ceph_dentry_info::lease_session once
it is set. If auth mds of corresponding dentry changes, dentry lease
keeps in an invalid state.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng 2017-07-03 09:09:10 +08:00 committed by Ilya Dryomov
parent 1d8f83604c
commit 481f001ffa
1 changed files with 7 additions and 2 deletions
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9
fs/ceph/inode.c
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@ -1016,6 +1016,7 @@ static void update_dentry_lease(struct dentry *dentry,
long unsigned ttl = from_time + (duration * HZ) / 1000;
long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
struct inode *dir;
struct ceph_mds_session *old_lease_session = NULL;
/*
* Make sure dentry's inode matches tgt_vino. NULL tgt_vino means that
@ -1051,8 +1052,10 @@ static void update_dentry_lease(struct dentry *dentry,
time_before(ttl, di->time))
goto out_unlock; /* we already have a newer lease. */
if (di->lease_session && di->lease_session != session)
goto out_unlock;
if (di->lease_session && di->lease_session != session) {
old_lease_session = di->lease_session;
di->lease_session = NULL;
}
ceph_dentry_lru_touch(dentry);
@ -1065,6 +1068,8 @@ static void update_dentry_lease(struct dentry *dentry,
di->time = ttl;
out_unlock:
spin_unlock(&dentry->d_lock);
if (old_lease_session)
ceph_put_mds_session(old_lease_session);
return;
}