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nfsd: improve client_has_state to check for unused openowners 

At least in the v4.0 case openowners can hang around for a while after
last close, but they shouldn't really block (for example), a new mount
with a different principal.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2015-10-15 16:11:01 -04:00
parent 2b63482185
commit 4eaea13425
1 changed files with 12 additions and 8 deletions
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20
fs/nfsd/nfs4state.c
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@ -2256,16 +2256,20 @@ nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
clid->flags = new->cl_exchange_flags;
}
static bool client_has_openowners(struct nfs4_client *clp)
{
struct nfs4_openowner *oo;
list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) {
if (!list_empty(&oo->oo_owner.so_stateids))
return true;
}
return false;
}
static bool client_has_state(struct nfs4_client *clp)
{
/*
* Note clp->cl_openowners check isn't quite right: there's no
* need to count owners without stateid's.
*
* Also note in 4.0 case should also be checking for openowners
* kept around just for close handling.
*/
return !list_empty(&clp->cl_openowners)
return client_has_openowners(clp)
#ifdef CONFIG_NFSD_PNFS
|| !list_empty(&clp->cl_lo_states)
#endif