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Message-ID: <20121114152131.4708.86778.stgit@localhost.localdomain>
Date: Wed, 14 Nov 2012 18:21:31 +0300
From: Stanislav Kinsbursky <skinsbursky@...allels.com>
To: bfields@...ldses.org
Cc: linux-nfs@...r.kernel.org, devel@...nvz.org,
Trond.Myklebust@...app.com, linux-kernel@...r.kernel.org,
jlayton@...hat.com
Subject: [PATCH v2 06/15] nfsd: make unconf_id_hashtbl allocated per net
This hash holds nfs4_clients info, which are network namespace aware.
So let's make it allocated per network namespace.
Note: this hash can be allocated in per-net operations. But it looks
better to allocate it on nfsd state start and thus don't waste resources
if server is not running.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>
---
fs/nfsd/netns.h | 1 +
fs/nfsd/nfs4state.c | 25 +++++++++++++++----------
2 files changed, 16 insertions(+), 10 deletions(-)
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index afd9116..1ff781f 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -55,6 +55,7 @@ struct nfsd_net {
int reclaim_str_hashtbl_size;
struct list_head *conf_id_hashtbl;
struct rb_root conf_name_tree;
+ struct list_head *unconf_id_hashtbl;
};
extern int nfsd_net_id;
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index ff03573..b967804 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -415,7 +415,6 @@ static unsigned int clientstr_hashval(const char *name)
*
* All of the above fields are protected by the client_mutex.
*/
-static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
static struct rb_root unconf_name_tree;
static struct list_head client_lru;
static struct list_head close_lru;
@@ -1369,11 +1368,12 @@ static void
add_to_unconfirmed(struct nfs4_client *clp)
{
unsigned int idhashval;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
add_clp_to_name_tree(clp, &unconf_name_tree);
idhashval = clientid_hashval(clp->cl_clientid.cl_id);
- list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
+ list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
renew_client(clp);
}
@@ -1409,12 +1409,12 @@ find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
}
static struct nfs4_client *
-find_unconfirmed_client(clientid_t *clid, bool sessions)
+find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
{
struct nfs4_client *clp;
unsigned int idhashval = clientid_hashval(clid->cl_id);
- list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
+ list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) {
if (same_clid(&clp->cl_clientid, clid)) {
if ((bool)clp->cl_minorversion != sessions)
return NULL;
@@ -1799,7 +1799,7 @@ nfsd4_create_session(struct svc_rqst *rqstp,
goto out_free_session;
nfs4_lock_state();
- unconf = find_unconfirmed_client(&cr_ses->clientid, true);
+ unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
conf = find_confirmed_client(&cr_ses->clientid, true, nn);
if (conf) {
@@ -2143,7 +2143,7 @@ nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *csta
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
nfs4_lock_state();
- unconf = find_unconfirmed_client(&dc->clientid, true);
+ unconf = find_unconfirmed_client(&dc->clientid, true, nn);
conf = find_confirmed_client(&dc->clientid, true, nn);
if (conf) {
@@ -2280,7 +2280,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
nfs4_lock_state();
conf = find_confirmed_client(clid, false, nn);
- unconf = find_unconfirmed_client(clid, false);
+ unconf = find_unconfirmed_client(clid, false, nn);
/*
* We try hard to give out unique clientid's, so if we get an
* attempt to confirm the same clientid with a different cred,
@@ -4720,9 +4720,6 @@ nfs4_state_init(void)
{
int i;
- for (i = 0; i < CLIENT_HASH_SIZE; i++) {
- INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
- }
unconf_name_tree = RB_ROOT;
for (i = 0; i < SESSION_HASH_SIZE; i++)
INIT_LIST_HEAD(&sessionid_hashtbl[i]);
@@ -4769,14 +4766,21 @@ static int nfs4_state_start_net(struct net *net)
CLIENT_HASH_SIZE, GFP_KERNEL);
if (!nn->conf_id_hashtbl)
goto err;
+ nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
+ CLIENT_HASH_SIZE, GFP_KERNEL);
+ if (!nn->unconf_id_hashtbl)
+ goto err_unconf_id;
for (i = 0; i < CLIENT_HASH_SIZE; i++) {
INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
+ INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
}
nn->conf_name_tree = RB_ROOT;
return 0;
+err_unconf_id:
+ kfree(nn->conf_id_hashtbl);
err:
return -ENOMEM;
}
@@ -4794,6 +4798,7 @@ __nfs4_state_shutdown_net(struct net *net)
destroy_client(clp);
}
}
+ kfree(nn->unconf_id_hashtbl);
kfree(nn->conf_id_hashtbl);
}
--
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