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NFSv4: Clean up NFS4ERR_CB_PATH_DOWN error management... 

Add a delegation cleanup phase to the state management loop, and do the
NFS4ERR_CB_PATH_DOWN recovery there.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2008-12-23 15:21:47 -05:00
parent 515d861177
commit 707fb4b324
4 changed files with 16 additions and 10 deletions
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14
fs/nfs/delegation.c
View File

@ -258,7 +258,7 @@ static int __nfs_inode_return_delegation(struct inode *inode, struct nfs_delegat
/*
* Return all delegations that have been marked for return
*/
static void nfs_client_return_marked_delegations(struct nfs_client *clp)
void nfs_client_return_marked_delegations(struct nfs_client *clp)
{
struct nfs_delegation *delegation;
struct inode *inode;
@ -342,15 +342,16 @@ void nfs_super_return_all_delegations(struct super_block *sb)
nfs_client_return_marked_delegations(clp);
}
static void nfs_client_return_all_delegations(struct nfs_client *clp)
static void nfs_client_mark_return_all_delegations(struct nfs_client *clp)
{
struct nfs_delegation *delegation;
rcu_read_lock();
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list)
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
}
rcu_read_unlock();
nfs_client_return_marked_delegations(clp);
}
static int nfs_do_expire_all_delegations(void *ptr)
@ -363,7 +364,8 @@ static int nfs_do_expire_all_delegations(void *ptr)
goto out;
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0)
goto out;
nfs_client_return_all_delegations(clp);
nfs_client_mark_return_all_delegations(clp);
nfs_client_return_marked_delegations(clp);
out:
nfs_put_client(clp);
module_put_and_exit(0);
@ -392,7 +394,7 @@ void nfs_handle_cb_pathdown(struct nfs_client *clp)
{
if (clp == NULL)
return;
nfs_client_return_all_delegations(clp);
nfs_client_mark_return_all_delegations(clp);
}
struct recall_threadargs {

1
fs/nfs/delegation.h
View File

@ -40,6 +40,7 @@ struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs
void nfs_super_return_all_delegations(struct super_block *sb);
void nfs_expire_all_delegations(struct nfs_client *clp);
void nfs_handle_cb_pathdown(struct nfs_client *clp);
void nfs_client_return_marked_delegations(struct nfs_client *clp);
void nfs_delegation_mark_reclaim(struct nfs_client *clp);
void nfs_delegation_reap_unclaimed(struct nfs_client *clp);

2
fs/nfs/nfs4_fs.h
View File

@ -43,7 +43,7 @@ enum nfs4_client_state {
NFS4CLNT_LEASE_EXPIRED,
NFS4CLNT_RECLAIM_REBOOT,
NFS4CLNT_RECLAIM_NOGRACE,
NFS4CLNT_CB_PATH_DOWN,
NFS4CLNT_DELEGRETURN,
};
/*

9
fs/nfs/nfs4state.c
View File

@ -1027,7 +1027,7 @@ static void nfs4_recovery_handle_error(struct nfs_client *clp, int error)
{
switch (error) {
case -NFS4ERR_CB_PATH_DOWN:
set_bit(NFS4CLNT_CB_PATH_DOWN, &clp->cl_state);
nfs_handle_cb_pathdown(clp);
break;
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_LEASE_MOVED:
@ -1156,11 +1156,14 @@ static int reclaimer(void *ptr)
nfs4_state_end_reclaim_nograce(clp);
continue;
}
if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) {
nfs_client_return_marked_delegations(clp);
continue;
}
break;
}
out:
if (test_and_clear_bit(NFS4CLNT_CB_PATH_DOWN, &clp->cl_state))
nfs_handle_cb_pathdown(clp);
nfs4_clear_recover_bit(clp);
nfs_put_client(clp);
module_put_and_exit(0);