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NFSv4.x: Allow callers of nfs_remove_bad_delegation() to specify a stateid 

Allow the callers of nfs_remove_bad_delegation() to specify the stateid
that needs to be marked as bad.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Tested-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
steinar/wifi_calib_4_9_kernel
Trond Myklebust 2016-09-22 13:38:58 -04:00 committed by Anna Schumaker
parent 4586f6e283
commit 41020b671a
4 changed files with 37 additions and 19 deletions
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38
fs/nfs/delegation.c
View File

@ -652,23 +652,39 @@ static void nfs_client_mark_return_unused_delegation_types(struct nfs_client *cl
rcu_read_unlock();
}
static void nfs_revoke_delegation(struct inode *inode)
static void nfs_mark_delegation_revoked(struct nfs_server *server,
struct nfs_delegation *delegation)
{
struct nfs_delegation *delegation;
rcu_read_lock();
delegation = rcu_dereference(NFS_I(inode)->delegation);
if (delegation != NULL) {
set_bit(NFS_DELEGATION_REVOKED, &delegation->flags);
nfs_mark_return_delegation(NFS_SERVER(inode), delegation);
}
rcu_read_unlock();
set_bit(NFS_DELEGATION_REVOKED, &delegation->flags);
nfs_mark_return_delegation(server, delegation);
}
void nfs_remove_bad_delegation(struct inode *inode)
static bool nfs_revoke_delegation(struct inode *inode,
const nfs4_stateid *stateid)
{
struct nfs_delegation *delegation;
bool ret = false;
rcu_read_lock();
delegation = rcu_dereference(NFS_I(inode)->delegation);
if (delegation == NULL)
goto out;
if (stateid && !nfs4_stateid_match(stateid, &delegation->stateid))
goto out;
nfs_mark_delegation_revoked(NFS_SERVER(inode), delegation);
ret = true;
out:
rcu_read_unlock();
return ret;
}
void nfs_remove_bad_delegation(struct inode *inode,
const nfs4_stateid *stateid)
{
struct nfs_delegation *delegation;
nfs_revoke_delegation(inode);
if (!nfs_revoke_delegation(inode, stateid))
return;
delegation = nfs_inode_detach_delegation(inode);
if (delegation) {
nfs_inode_find_state_and_recover(inode, &delegation->stateid);

2
fs/nfs/delegation.h
View File

@ -47,7 +47,7 @@ void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags);
void nfs_expire_unreferenced_delegations(struct nfs_client *clp);
int nfs_client_return_marked_delegations(struct nfs_client *clp);
int nfs_delegations_present(struct nfs_client *clp);
void nfs_remove_bad_delegation(struct inode *inode);
void nfs_remove_bad_delegation(struct inode *inode, const nfs4_stateid *stateid);
void nfs_delegation_mark_reclaim(struct nfs_client *clp);
void nfs_delegation_reap_unclaimed(struct nfs_client *clp);

2
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -1080,7 +1080,7 @@ static int ff_layout_async_handle_error_v4(struct rpc_task *task,
case -NFS4ERR_BAD_STATEID:
if (state == NULL)
break;
nfs_remove_bad_delegation(state->inode);
nfs_remove_bad_delegation(state->inode, NULL);
case -NFS4ERR_OPENMODE:
if (state == NULL)
break;

14
fs/nfs/nfs4proc.c
View File

@ -2385,9 +2385,10 @@ static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *sta
return ret;
}
static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
const nfs4_stateid *stateid)
{
nfs_remove_bad_delegation(state->inode);
nfs_remove_bad_delegation(state->inode, stateid);
write_seqlock(&state->seqlock);
nfs4_stateid_copy(&state->stateid, &state->open_stateid);
write_sequnlock(&state->seqlock);
@ -2397,7 +2398,7 @@ static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
{
if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
nfs_finish_clear_delegation_stateid(state);
nfs_finish_clear_delegation_stateid(state, NULL);
}
static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
@ -2443,19 +2444,20 @@ static void nfs41_check_delegation_stateid(struct nfs4_state *state)
rcu_read_unlock();
return;
}
nfs4_stateid_copy(&stateid, &delegation->stateid);
if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
rcu_read_unlock();
nfs_finish_clear_delegation_stateid(state);
nfs_finish_clear_delegation_stateid(state, &stateid);
return;
}
nfs4_stateid_copy(&stateid, &delegation->stateid);
cred = get_rpccred(delegation->cred);
rcu_read_unlock();
status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
trace_nfs4_test_delegation_stateid(state, NULL, status);
if (status != NFS_OK)
nfs_finish_clear_delegation_stateid(state);
nfs_finish_clear_delegation_stateid(state, &stateid);
put_rpccred(cred);
}