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nfsd: protect the close_lru list and oo_last_closed_stid with client_lock 

Currently, it's protected by the client_mutex. Move it so that the list
and the fields in the openowner are protected by the client_lock.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Jeff Layton 2014-07-30 08:27:11 -04:00 committed by J. Bruce Fields
parent 0a880a28f8
commit 217526e7ec
1 changed files with 31 additions and 7 deletions
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38
fs/nfsd/nfs4state.c
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@ -1122,13 +1122,19 @@ static void unhash_openowner_locked(struct nfs4_openowner *oo)
static void release_last_closed_stateid(struct nfs4_openowner *oo)
{
struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
nfsd_net_id);
struct nfs4_ol_stateid *s;
spin_lock(&nn->client_lock);
s = oo->oo_last_closed_stid;
if (s) {
list_del_init(&oo->oo_close_lru);
oo->oo_last_closed_stid = NULL;
nfs4_put_stid(&s->st_stid);
}
spin_unlock(&nn->client_lock);
if (s)
nfs4_put_stid(&s->st_stid);
}
static void release_openowner(struct nfs4_openowner *oo)
@ -3265,6 +3271,7 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp,
static void
move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
{
struct nfs4_ol_stateid *last;
struct nfs4_openowner *oo = openowner(s->st_stateowner);
struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,
nfsd_net_id);
@ -3287,10 +3294,15 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
put_nfs4_file(s->st_stid.sc_file);
s->st_stid.sc_file = NULL;
}
release_last_closed_stateid(oo);
spin_lock(&nn->client_lock);
last = oo->oo_last_closed_stid;
oo->oo_last_closed_stid = s;
list_move_tail(&oo->oo_close_lru, &nn->close_lru);
oo->oo_time = get_seconds();
spin_unlock(&nn->client_lock);
if (last)
nfs4_put_stid(&last->st_stid);
}
/* search file_hashtbl[] for file */
@ -4148,6 +4160,7 @@ nfs4_laundromat(struct nfsd_net *nn)
struct nfs4_client *clp;
struct nfs4_openowner *oo;
struct nfs4_delegation *dp;
struct nfs4_ol_stateid *stp;
struct list_head *pos, *next, reaplist;
time_t cutoff = get_seconds() - nn->nfsd4_lease;
time_t t, new_timeo = nn->nfsd4_lease;
@ -4201,15 +4214,26 @@ nfs4_laundromat(struct nfsd_net *nn)
list_del_init(&dp->dl_recall_lru);
revoke_delegation(dp);
}
list_for_each_safe(pos, next, &nn->close_lru) {
oo = container_of(pos, struct nfs4_openowner, oo_close_lru);
if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) {
spin_lock(&nn->client_lock);
while (!list_empty(&nn->close_lru)) {
oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
oo_close_lru);
if (time_after((unsigned long)oo->oo_time,
(unsigned long)cutoff)) {
t = oo->oo_time - cutoff;
new_timeo = min(new_timeo, t);
break;
}
release_last_closed_stateid(oo);
list_del_init(&oo->oo_close_lru);
stp = oo->oo_last_closed_stid;
oo->oo_last_closed_stid = NULL;
spin_unlock(&nn->client_lock);
nfs4_put_stid(&stp->st_stid);
spin_lock(&nn->client_lock);
}
spin_unlock(&nn->client_lock);
new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
nfs4_unlock_state();
return new_timeo;