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nfsd: Move the open owner hash table into struct nfs4_client

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Preparation for removing the client_mutex.

Convert the open owner hash table into a per-client table and protect it
using the nfs4_client->cl_lock spin lock.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2014-07-29 21:34:36 -04:00 committed by J. Bruce Fields
parent c58c6610ec
commit d4f0489f38
3 changed files with 86 additions and 103 deletions
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1
fs/nfsd/netns.h
View File

@ -63,7 +63,6 @@ struct nfsd_net {
struct rb_root conf_name_tree;
struct list_head *unconf_id_hashtbl;
struct rb_root unconf_name_tree;
struct list_head *ownerstr_hashtbl;
struct list_head *sessionid_hashtbl;
/*
* client_lru holds client queue ordered by nfs4_client.cl_time

187
fs/nfsd/nfs4state.c
View File

@ -240,35 +240,27 @@ static void nfsd4_put_session(struct nfsd4_session *ses)
}
static int
same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
clientid_t *clid)
same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner)
{
return (sop->so_owner.len == owner->len) &&
0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
(sop->so_client->cl_clientid.cl_id == clid->cl_id);
0 == memcmp(sop->so_owner.data, owner->data, owner->len);
}
static struct nfs4_openowner *
find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open,
bool sessions, struct nfsd_net *nn)
struct nfs4_client *clp)
{
struct nfs4_stateowner *so;
struct nfs4_openowner *oo;
struct nfs4_client *clp;
lockdep_assert_held(&nn->client_lock);
lockdep_assert_held(&clp->cl_lock);
list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) {
list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval],
so_strhash) {
if (!so->so_is_open_owner)
continue;
if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {
oo = openowner(so);
clp = oo->oo_owner.so_client;
if ((bool)clp->cl_minorversion != sessions)
break;
renew_client_locked(clp);
if (same_owner_str(so, &open->op_owner)) {
atomic_inc(&so->so_count);
return oo;
return openowner(so);
}
}
return NULL;
@ -276,17 +268,16 @@ find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open,
static struct nfs4_openowner *
find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
bool sessions, struct nfsd_net *nn)
struct nfs4_client *clp)
{
struct nfs4_openowner *oo;
spin_lock(&nn->client_lock);
oo = find_openstateowner_str_locked(hashval, open, sessions, nn);
spin_unlock(&nn->client_lock);
spin_lock(&clp->cl_lock);
oo = find_openstateowner_str_locked(hashval, open, clp);
spin_unlock(&clp->cl_lock);
return oo;
}
static inline u32
opaque_hashval(const void *ptr, int nbytes)
{
@ -408,12 +399,11 @@ unsigned long max_delegations;
#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)
static unsigned int ownerstr_hashval(struct xdr_netobj *ownername)
{
unsigned int ret;
ret = opaque_hashval(ownername->data, ownername->len);
ret += clientid;
return ret & OWNER_HASH_MASK;
}
@ -1002,40 +992,37 @@ static void release_lock_stateid(struct nfs4_ol_stateid *stp)
static void unhash_lockowner_locked(struct nfs4_lockowner *lo)
{
struct nfsd_net *nn = net_generic(lo->lo_owner.so_client->net,
nfsd_net_id);
struct nfs4_client *clp = lo->lo_owner.so_client;
lockdep_assert_held(&nn->client_lock);
lockdep_assert_held(&clp->cl_lock);
list_del_init(&lo->lo_owner.so_strhash);
}
static void release_lockowner_stateids(struct nfs4_lockowner *lo)
{
struct nfsd_net *nn = net_generic(lo->lo_owner.so_client->net,
nfsd_net_id);
struct nfs4_client *clp = lo->lo_owner.so_client;
struct nfs4_ol_stateid *stp;
lockdep_assert_held(&nn->client_lock);
lockdep_assert_held(&clp->cl_lock);
while (!list_empty(&lo->lo_owner.so_stateids)) {
stp = list_first_entry(&lo->lo_owner.so_stateids,
struct nfs4_ol_stateid, st_perstateowner);
spin_unlock(&nn->client_lock);
spin_unlock(&clp->cl_lock);
release_lock_stateid(stp);
spin_lock(&nn->client_lock);
spin_lock(&clp->cl_lock);
}
}
static void release_lockowner(struct nfs4_lockowner *lo)
{
struct nfsd_net *nn = net_generic(lo->lo_owner.so_client->net,
nfsd_net_id);
struct nfs4_client *clp = lo->lo_owner.so_client;
spin_lock(&nn->client_lock);
spin_lock(&clp->cl_lock);
unhash_lockowner_locked(lo);
release_lockowner_stateids(lo);
spin_unlock(&nn->client_lock);
spin_unlock(&clp->cl_lock);
nfs4_put_stateowner(&lo->lo_owner);
}
@ -1070,10 +1057,9 @@ static void release_open_stateid(struct nfs4_ol_stateid *stp)
static void unhash_openowner_locked(struct nfs4_openowner *oo)
{
struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
nfsd_net_id);
struct nfs4_client *clp = oo->oo_owner.so_client;
lockdep_assert_held(&nn->client_lock);
lockdep_assert_held(&clp->cl_lock);
list_del_init(&oo->oo_owner.so_strhash);
list_del_init(&oo->oo_perclient);
@ -1093,29 +1079,27 @@ static void release_last_closed_stateid(struct nfs4_openowner *oo)
static void release_openowner_stateids(struct nfs4_openowner *oo)
{
struct nfs4_ol_stateid *stp;
struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
nfsd_net_id);
struct nfs4_client *clp = oo->oo_owner.so_client;
lockdep_assert_held(&nn->client_lock);
lockdep_assert_held(&clp->cl_lock);
while (!list_empty(&oo->oo_owner.so_stateids)) {
stp = list_first_entry(&oo->oo_owner.so_stateids,
struct nfs4_ol_stateid, st_perstateowner);
spin_unlock(&nn->client_lock);
spin_unlock(&clp->cl_lock);
release_open_stateid(stp);
spin_lock(&nn->client_lock);
spin_lock(&clp->cl_lock);
}
}
static void release_openowner(struct nfs4_openowner *oo)
{
struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
nfsd_net_id);
struct nfs4_client *clp = oo->oo_owner.so_client;
spin_lock(&nn->client_lock);
spin_lock(&clp->cl_lock);
unhash_openowner_locked(oo);
release_openowner_stateids(oo);
spin_unlock(&nn->client_lock);
spin_unlock(&clp->cl_lock);
release_last_closed_stateid(oo);
nfs4_put_stateowner(&oo->oo_owner);
}
@ -1497,15 +1481,20 @@ STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
static struct nfs4_client *alloc_client(struct xdr_netobj name)
{
struct nfs4_client *clp;
int i;
clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
if (clp == NULL)
return NULL;
clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
if (clp->cl_name.data == NULL) {
kfree(clp);
return NULL;
}
if (clp->cl_name.data == NULL)
goto err_no_name;
clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
OWNER_HASH_SIZE, GFP_KERNEL);
if (!clp->cl_ownerstr_hashtbl)
goto err_no_hashtbl;
for (i = 0; i < OWNER_HASH_SIZE; i++)
INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);
clp->cl_name.len = name.len;
INIT_LIST_HEAD(&clp->cl_sessions);
idr_init(&clp->cl_stateids);
@ -1520,6 +1509,11 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name)
spin_lock_init(&clp->cl_lock);
rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
return clp;
err_no_hashtbl:
kfree(clp->cl_name.data);
err_no_name:
kfree(clp);
return NULL;
}
static void
@ -1538,6 +1532,7 @@ free_client(struct nfs4_client *clp)
}
rpc_destroy_wait_queue(&clp->cl_cb_waitq);
free_svc_cred(&clp->cl_cred);
kfree(clp->cl_ownerstr_hashtbl);
kfree(clp->cl_name.data);
idr_destroy(&clp->cl_stateids);
kfree(clp);
@ -3074,20 +3069,20 @@ static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj
static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
{
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
lockdep_assert_held(&clp->cl_lock);
list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
list_add(&oo->oo_owner.so_strhash,
&clp->cl_ownerstr_hashtbl[strhashval]);
list_add(&oo->oo_perclient, &clp->cl_openowners);
}
static void nfs4_unhash_openowner(struct nfs4_stateowner *so)
{
struct nfs4_openowner *oo = openowner(so);
struct nfsd_net *nn = net_generic(so->so_client->net, nfsd_net_id);
struct nfs4_client *clp = so->so_client;
spin_lock(&nn->client_lock);
unhash_openowner_locked(oo);
spin_unlock(&nn->client_lock);
spin_lock(&clp->cl_lock);
unhash_openowner_locked(openowner(so));
spin_unlock(&clp->cl_lock);
}
static void nfs4_free_openowner(struct nfs4_stateowner *so)
@ -3107,7 +3102,6 @@ alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
struct nfsd4_compound_state *cstate)
{
struct nfs4_client *clp = cstate->clp;
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
struct nfs4_openowner *oo, *ret;
oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
@ -3122,15 +3116,14 @@ alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
oo->oo_time = 0;
oo->oo_last_closed_stid = NULL;
INIT_LIST_HEAD(&oo->oo_close_lru);
spin_lock(&nn->client_lock);
ret = find_openstateowner_str_locked(strhashval,
open, clp->cl_minorversion, nn);
spin_lock(&clp->cl_lock);
ret = find_openstateowner_str_locked(strhashval, open, clp);
if (ret == NULL) {
hash_openowner(oo, clp, strhashval);
ret = oo;
} else
nfs4_free_openowner(&oo->oo_owner);
spin_unlock(&nn->client_lock);
spin_unlock(&clp->cl_lock);
return oo;
}
@ -3412,8 +3405,8 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate,
return status;
clp = cstate->clp;
strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner);
oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn);
strhashval = ownerstr_hashval(&open->op_owner);
oo = find_openstateowner_str(strhashval, open, clp);
open->op_openowner = oo;
if (!oo) {
goto new_owner;
@ -4818,15 +4811,16 @@ nevermind:
static struct nfs4_lockowner *
find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner,
struct nfsd_net *nn)
struct nfs4_client *clp)
{
unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner);
unsigned int strhashval = ownerstr_hashval(owner);
struct nfs4_stateowner *so;
list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) {
list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],
so_strhash) {
if (so->so_is_open_owner)
continue;
if (!same_owner_str(so, owner, clid))
if (!same_owner_str(so, owner))
continue;
atomic_inc(&so->so_count);
return lockowner(so);
@ -4836,23 +4830,23 @@ find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner,
static struct nfs4_lockowner *
find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner,
struct nfsd_net *nn)
struct nfs4_client *clp)
{
struct nfs4_lockowner *lo;
spin_lock(&nn->client_lock);
lo = find_lockowner_str_locked(clid, owner, nn);
spin_unlock(&nn->client_lock);
spin_lock(&clp->cl_lock);
lo = find_lockowner_str_locked(clid, owner, clp);
spin_unlock(&clp->cl_lock);
return lo;
}
static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop)
{
struct nfsd_net *nn = net_generic(sop->so_client->net, nfsd_net_id);
struct nfs4_client *clp = sop->so_client;
spin_lock(&nn->client_lock);
spin_lock(&clp->cl_lock);
unhash_lockowner_locked(lockowner(sop));
spin_unlock(&nn->client_lock);
spin_unlock(&clp->cl_lock);
}
static void nfs4_free_lockowner(struct nfs4_stateowner *sop)
@ -4879,7 +4873,6 @@ alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp,
struct nfs4_ol_stateid *open_stp,
struct nfsd4_lock *lock)
{
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
struct nfs4_lockowner *lo, *ret;
lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
@ -4889,16 +4882,16 @@ alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp,
lo->lo_owner.so_is_open_owner = 0;
lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;
lo->lo_owner.so_ops = &lockowner_ops;
spin_lock(&nn->client_lock);
spin_lock(&clp->cl_lock);
ret = find_lockowner_str_locked(&clp->cl_clientid,
&lock->lk_new_owner, nn);
&lock->lk_new_owner, clp);
if (ret == NULL) {
list_add(&lo->lo_owner.so_strhash,
&nn->ownerstr_hashtbl[strhashval]);
&clp->cl_ownerstr_hashtbl[strhashval]);
ret = lo;
} else
nfs4_free_lockowner(&lo->lo_owner);
spin_unlock(&nn->client_lock);
spin_unlock(&clp->cl_lock);
return lo;
}
@ -5010,12 +5003,10 @@ lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
struct inode *inode = cstate->current_fh.fh_dentry->d_inode;
struct nfs4_lockowner *lo;
unsigned int strhashval;
struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id);
lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn);
lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl);
if (!lo) {
strhashval = ownerstr_hashval(cl->cl_clientid.cl_id,
&lock->v.new.owner);
strhashval = ownerstr_hashval(&lock->v.new.owner);
lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
if (lo == NULL)
return nfserr_jukebox;
@ -5293,7 +5284,8 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
}
lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn);
lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner,
cstate->clp);
if (lo)
file_lock->fl_owner = (fl_owner_t)lo;
file_lock->fl_pid = current->tgid;
@ -5436,7 +5428,7 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp,
struct nfs4_lockowner *lo;
struct nfs4_ol_stateid *stp;
struct xdr_netobj *owner = &rlockowner->rl_owner;
unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);
unsigned int hashval = ownerstr_hashval(owner);
__be32 status;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct nfs4_client *clp;
@ -5452,29 +5444,29 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp,
status = nfserr_locks_held;
clp = cstate->clp;
/* Find the matching lock stateowner */
spin_lock(&nn->client_lock);
list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) {
spin_lock(&clp->cl_lock);
list_for_each_entry(tmp, &clp->cl_ownerstr_hashtbl[hashval],
so_strhash) {
if (tmp->so_is_open_owner)
continue;
if (same_owner_str(tmp, owner, clid)) {
if (same_owner_str(tmp, owner)) {
sop = tmp;
atomic_inc(&sop->so_count);
break;
}
}
spin_unlock(&nn->client_lock);
/* No matching owner found, maybe a replay? Just declare victory... */
if (!sop) {
spin_unlock(&clp->cl_lock);
status = nfs_ok;
goto out;
}
lo = lockowner(sop);
/* see if there are still any locks associated with it */
clp = cstate->clp;
spin_lock(&clp->cl_lock);
list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
if (check_for_locks(stp->st_stid.sc_file, lo)) {
spin_unlock(&clp->cl_lock);
@ -5829,10 +5821,6 @@ static int nfs4_state_create_net(struct net *net)
CLIENT_HASH_SIZE, GFP_KERNEL);
if (!nn->unconf_id_hashtbl)
goto err_unconf_id;
nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
OWNER_HASH_SIZE, GFP_KERNEL);
if (!nn->ownerstr_hashtbl)
goto err_ownerstr;
nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
SESSION_HASH_SIZE, GFP_KERNEL);
if (!nn->sessionid_hashtbl)
@ -5842,8 +5830,6 @@ static int nfs4_state_create_net(struct net *net)
INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
}
for (i = 0; i < OWNER_HASH_SIZE; i++)
INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]);
for (i = 0; i < SESSION_HASH_SIZE; i++)
INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
nn->conf_name_tree = RB_ROOT;
@ -5859,8 +5845,6 @@ static int nfs4_state_create_net(struct net *net)
return 0;
err_sessionid:
kfree(nn->ownerstr_hashtbl);
err_ownerstr:
kfree(nn->unconf_id_hashtbl);
err_unconf_id:
kfree(nn->conf_id_hashtbl);
@ -5890,7 +5874,6 @@ nfs4_state_destroy_net(struct net *net)
}
kfree(nn->sessionid_hashtbl);
kfree(nn->ownerstr_hashtbl);
kfree(nn->unconf_id_hashtbl);
kfree(nn->conf_id_hashtbl);
put_net(net);

1
fs/nfsd/state.h
View File

@ -235,6 +235,7 @@ struct nfsd4_sessionid {
struct nfs4_client {
struct list_head cl_idhash; /* hash by cl_clientid.id */
struct rb_node cl_namenode; /* link into by-name trees */
struct list_head *cl_ownerstr_hashtbl;
struct list_head cl_openowners;
struct idr cl_stateids; /* stateid lookup */
struct list_head cl_delegations;