#include <linux/jhash.h>
#include <linux/string_helpers.h>
#include <linux/fsnotify.h>
+#include <linux/rhashtable.h>
#include <linux/nfs_ssc.h>
+
#include "xdr4.h"
#include "xdr4cb.h"
#include "vfs.h"
static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
void nfsd4_end_grace(struct nfsd_net *nn);
static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps);
+static void nfsd4_file_hash_remove(struct nfs4_file *fi);
/* Locking: */
void
put_nfs4_file(struct nfs4_file *fi)
{
- might_lock(&state_lock);
-
- if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) {
- hlist_del_rcu(&fi->fi_hash);
- spin_unlock(&state_lock);
+ if (refcount_dec_and_test(&fi->fi_ref)) {
+ nfsd4_file_hash_remove(fi);
WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));
WARN_ON_ONCE(!list_empty(&fi->fi_delegations));
call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);
return ret;
}
-static struct nfsd_file *find_deleg_file(struct nfs4_file *f)
+static struct nfsd_file *find_any_file_locked(struct nfs4_file *f)
{
- struct nfsd_file *ret = NULL;
+ lockdep_assert_held(&f->fi_lock);
+
+ if (f->fi_fds[O_RDWR])
+ return f->fi_fds[O_RDWR];
+ if (f->fi_fds[O_WRONLY])
+ return f->fi_fds[O_WRONLY];
+ if (f->fi_fds[O_RDONLY])
+ return f->fi_fds[O_RDONLY];
+ return NULL;
+}
+
+static struct nfsd_file *find_deleg_file_locked(struct nfs4_file *f)
+{
+ lockdep_assert_held(&f->fi_lock);
- spin_lock(&f->fi_lock);
if (f->fi_deleg_file)
- ret = nfsd_file_get(f->fi_deleg_file);
- spin_unlock(&f->fi_lock);
- return ret;
+ return f->fi_deleg_file;
+ return NULL;
}
static atomic_long_t num_delegations;
return ret & OWNER_HASH_MASK;
}
-/* hash table for nfs4_file */
-#define FILE_HASH_BITS 8
-#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
+static struct rhltable nfs4_file_rhltable ____cacheline_aligned_in_smp;
-static unsigned int file_hashval(struct svc_fh *fh)
-{
- struct inode *inode = d_inode(fh->fh_dentry);
+static const struct rhashtable_params nfs4_file_rhash_params = {
+ .key_len = sizeof_field(struct nfs4_file, fi_inode),
+ .key_offset = offsetof(struct nfs4_file, fi_inode),
+ .head_offset = offsetof(struct nfs4_file, fi_rlist),
- /* XXX: why not (here & in file cache) use inode? */
- return (unsigned int)hash_long(inode->i_ino, FILE_HASH_BITS);
-}
-
-static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
+ /*
+ * Start with a single page hash table to reduce resizing churn
+ * on light workloads.
+ */
+ .min_size = 256,
+ .automatic_shrinking = true,
+};
/*
* Check if courtesy clients have conflicting access and resolve it if possible
swap(f2, fp->fi_fds[O_RDWR]);
spin_unlock(&fp->fi_lock);
if (f1)
- nfsd_file_close(f1);
+ nfsd_file_put(f1);
if (f2)
- nfsd_file_close(f2);
+ nfsd_file_put(f2);
}
}
WARN_ON(!list_empty(&dp->dl_recall_lru));
+ trace_nfsd_stid_revoke(&dp->dl_stid);
+
if (clp->cl_minorversion) {
dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
refcount_inc(&dp->dl_stid.sc_count);
int numslots = fattrs->maxreqs;
int slotsize = slot_bytes(fattrs);
struct nfsd4_session *new;
- int mem, i;
+ int i;
- BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
- + sizeof(struct nfsd4_session) > PAGE_SIZE);
- mem = numslots * sizeof(struct nfsd4_slot *);
+ BUILD_BUG_ON(struct_size(new, se_slots, NFSD_MAX_SLOTS_PER_SESSION)
+ > PAGE_SIZE);
- new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
+ new = kzalloc(struct_size(new, se_slots, numslots), GFP_KERNEL);
if (!new)
return NULL;
/* allocate each struct nfsd4_slot and data cache in one piece */
kfree(clp->cl_nii_domain.data);
kfree(clp->cl_nii_name.data);
idr_destroy(&clp->cl_stateids);
+ kfree(clp->cl_ra);
kmem_cache_free(client_slab, clp);
}
ols = openlockstateid(st);
oo = ols->st_stateowner;
nf = st->sc_file;
- file = find_any_file(nf);
+
+ spin_lock(&nf->fi_lock);
+ file = find_any_file_locked(nf);
if (!file)
- return 0;
+ goto out;
seq_printf(s, "- ");
nfs4_show_stateid(s, &st->sc_stateid);
seq_printf(s, ", ");
nfs4_show_owner(s, oo);
seq_printf(s, " }\n");
- nfsd_file_put(file);
-
+out:
+ spin_unlock(&nf->fi_lock);
return 0;
}
ols = openlockstateid(st);
oo = ols->st_stateowner;
nf = st->sc_file;
- file = find_any_file(nf);
+ spin_lock(&nf->fi_lock);
+ file = find_any_file_locked(nf);
if (!file)
- return 0;
+ goto out;
seq_printf(s, "- ");
nfs4_show_stateid(s, &st->sc_stateid);
seq_printf(s, ", ");
nfs4_show_owner(s, oo);
seq_printf(s, " }\n");
- nfsd_file_put(file);
-
+out:
+ spin_unlock(&nf->fi_lock);
return 0;
}
ds = delegstateid(st);
nf = st->sc_file;
- file = find_deleg_file(nf);
+ spin_lock(&nf->fi_lock);
+ file = find_deleg_file_locked(nf);
if (!file)
- return 0;
+ goto out;
seq_printf(s, "- ");
nfs4_show_stateid(s, &st->sc_stateid);
seq_printf(s, ", ");
nfs4_show_fname(s, file);
seq_printf(s, " }\n");
- nfsd_file_put(file);
-
+out:
+ spin_unlock(&nf->fi_lock);
return 0;
}
[3] = {""},
};
+static int
+nfsd4_cb_recall_any_done(struct nfsd4_callback *cb,
+ struct rpc_task *task)
+{
+ trace_nfsd_cb_recall_any_done(cb, task);
+ switch (task->tk_status) {
+ case -NFS4ERR_DELAY:
+ rpc_delay(task, 2 * HZ);
+ return 0;
+ default:
+ return 1;
+ }
+}
+
+static void
+nfsd4_cb_recall_any_release(struct nfsd4_callback *cb)
+{
+ struct nfs4_client *clp = cb->cb_clp;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ spin_lock(&nn->client_lock);
+ clear_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags);
+ put_client_renew_locked(clp);
+ spin_unlock(&nn->client_lock);
+}
+
+static const struct nfsd4_callback_ops nfsd4_cb_recall_any_ops = {
+ .done = nfsd4_cb_recall_any_done,
+ .release = nfsd4_cb_recall_any_release,
+};
+
static struct nfs4_client *create_client(struct xdr_netobj name,
struct svc_rqst *rqstp, nfs4_verifier *verf)
{
free_client(clp);
return NULL;
}
+ clp->cl_ra = kzalloc(sizeof(*clp->cl_ra), GFP_KERNEL);
+ if (!clp->cl_ra) {
+ free_client(clp);
+ return NULL;
+ }
+ clp->cl_ra_time = 0;
+ nfsd4_init_cb(&clp->cl_ra->ra_cb, clp, &nfsd4_cb_recall_any_ops,
+ NFSPROC4_CLNT_CB_RECALL_ANY);
return clp;
}
}
/* OPEN Share state helper functions */
-static void nfsd4_init_file(struct svc_fh *fh, unsigned int hashval,
- struct nfs4_file *fp)
-{
- lockdep_assert_held(&state_lock);
+static void nfsd4_file_init(const struct svc_fh *fh, struct nfs4_file *fp)
+{
refcount_set(&fp->fi_ref, 1);
spin_lock_init(&fp->fi_lock);
INIT_LIST_HEAD(&fp->fi_stateids);
INIT_LIST_HEAD(&fp->fi_lo_states);
atomic_set(&fp->fi_lo_recalls, 0);
#endif
- hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
}
void
}
static unsigned long
-nfsd_courtesy_client_count(struct shrinker *shrink, struct shrink_control *sc)
+nfsd4_state_shrinker_count(struct shrinker *shrink, struct shrink_control *sc)
{
- int cnt;
+ int count;
struct nfsd_net *nn = container_of(shrink,
struct nfsd_net, nfsd_client_shrinker);
- cnt = atomic_read(&nn->nfsd_courtesy_clients);
- if (cnt > 0)
- mod_delayed_work(laundry_wq, &nn->nfsd_shrinker_work, 0);
- return (unsigned long)cnt;
+ count = atomic_read(&nn->nfsd_courtesy_clients);
+ if (!count)
+ count = atomic_long_read(&num_delegations);
+ if (count)
+ queue_work(laundry_wq, &nn->nfsd_shrinker_work);
+ return (unsigned long)count;
}
static unsigned long
-nfsd_courtesy_client_scan(struct shrinker *shrink, struct shrink_control *sc)
+nfsd4_state_shrinker_scan(struct shrinker *shrink, struct shrink_control *sc)
{
return SHRINK_STOP;
}
-int
+void
nfsd4_init_leases_net(struct nfsd_net *nn)
{
struct sysinfo si;
nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB);
atomic_set(&nn->nfsd_courtesy_clients, 0);
- nn->nfsd_client_shrinker.scan_objects = nfsd_courtesy_client_scan;
- nn->nfsd_client_shrinker.count_objects = nfsd_courtesy_client_count;
- nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS;
- return register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client");
-}
-
-void
-nfsd4_leases_net_shutdown(struct nfsd_net *nn)
-{
- unregister_shrinker(&nn->nfsd_client_shrinker);
}
static void init_nfs4_replay(struct nfs4_replay *rp)
nfs4_put_stid(&last->st_stid);
}
-/* search file_hashtbl[] for file */
-static struct nfs4_file *
-find_file_locked(struct svc_fh *fh, unsigned int hashval)
+static noinline_for_stack struct nfs4_file *
+nfsd4_file_hash_lookup(const struct svc_fh *fhp)
{
- struct nfs4_file *fp;
+ struct inode *inode = d_inode(fhp->fh_dentry);
+ struct rhlist_head *tmp, *list;
+ struct nfs4_file *fi;
- hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
- lockdep_is_held(&state_lock)) {
- if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) {
- if (refcount_inc_not_zero(&fp->fi_ref))
- return fp;
+ rcu_read_lock();
+ list = rhltable_lookup(&nfs4_file_rhltable, &inode,
+ nfs4_file_rhash_params);
+ rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) {
+ if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {
+ if (refcount_inc_not_zero(&fi->fi_ref)) {
+ rcu_read_unlock();
+ return fi;
+ }
}
}
+ rcu_read_unlock();
return NULL;
}
-static struct nfs4_file *insert_file(struct nfs4_file *new, struct svc_fh *fh,
- unsigned int hashval)
+/*
+ * On hash insertion, identify entries with the same inode but
+ * distinct filehandles. They will all be on the list returned
+ * by rhltable_lookup().
+ *
+ * inode->i_lock prevents racing insertions from adding an entry
+ * for the same inode/fhp pair twice.
+ */
+static noinline_for_stack struct nfs4_file *
+nfsd4_file_hash_insert(struct nfs4_file *new, const struct svc_fh *fhp)
{
- struct nfs4_file *fp;
+ struct inode *inode = d_inode(fhp->fh_dentry);
+ struct rhlist_head *tmp, *list;
struct nfs4_file *ret = NULL;
bool alias_found = false;
+ struct nfs4_file *fi;
+ int err;
- spin_lock(&state_lock);
- hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
- lockdep_is_held(&state_lock)) {
- if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) {
- if (refcount_inc_not_zero(&fp->fi_ref))
- ret = fp;
- } else if (d_inode(fh->fh_dentry) == fp->fi_inode)
- fp->fi_aliased = alias_found = true;
- }
- if (likely(ret == NULL)) {
- nfsd4_init_file(fh, hashval, new);
- new->fi_aliased = alias_found;
- ret = new;
+ rcu_read_lock();
+ spin_lock(&inode->i_lock);
+
+ list = rhltable_lookup(&nfs4_file_rhltable, &inode,
+ nfs4_file_rhash_params);
+ rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) {
+ if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {
+ if (refcount_inc_not_zero(&fi->fi_ref))
+ ret = fi;
+ } else
+ fi->fi_aliased = alias_found = true;
}
- spin_unlock(&state_lock);
- return ret;
-}
+ if (ret)
+ goto out_unlock;
-static struct nfs4_file * find_file(struct svc_fh *fh)
-{
- struct nfs4_file *fp;
- unsigned int hashval = file_hashval(fh);
+ nfsd4_file_init(fhp, new);
+ err = rhltable_insert(&nfs4_file_rhltable, &new->fi_rlist,
+ nfs4_file_rhash_params);
+ if (err)
+ goto out_unlock;
- rcu_read_lock();
- fp = find_file_locked(fh, hashval);
+ new->fi_aliased = alias_found;
+ ret = new;
+
+out_unlock:
+ spin_unlock(&inode->i_lock);
rcu_read_unlock();
- return fp;
+ return ret;
}
-static struct nfs4_file *
-find_or_add_file(struct nfs4_file *new, struct svc_fh *fh)
+static noinline_for_stack void nfsd4_file_hash_remove(struct nfs4_file *fi)
{
- struct nfs4_file *fp;
- unsigned int hashval = file_hashval(fh);
-
- rcu_read_lock();
- fp = find_file_locked(fh, hashval);
- rcu_read_unlock();
- if (fp)
- return fp;
-
- return insert_file(new, fh, hashval);
+ rhltable_remove(&nfs4_file_rhltable, &fi->fi_rlist,
+ nfs4_file_rhash_params);
}
/*
struct nfs4_file *fp;
__be32 ret = nfs_ok;
- fp = find_file(current_fh);
+ fp = nfsd4_file_hash_lookup(current_fh);
if (!fp)
return ret;
+
/* Check for conflicting share reservations */
spin_lock(&fp->fi_lock);
if (fp->fi_share_deny & deny_type)
static bool nfsd4_deleg_present(const struct inode *inode)
{
- struct file_lock_context *ctx = smp_load_acquire(&inode->i_flctx);
+ struct file_lock_context *ctx = locks_inode_context(inode);
return ctx && !list_empty_careful(&ctx->flc_lease);
}
if (!fp->fi_fds[oflag]) {
spin_unlock(&fp->fi_lock);
- if (!open->op_filp) {
- status = nfsd_file_acquire(rqstp, cur_fh, access, &nf);
- if (status != nfs_ok)
- goto out_put_access;
- } else {
- status = nfsd_file_create(rqstp, cur_fh, access, &nf);
- if (status != nfs_ok)
- goto out_put_access;
- nf->nf_file = open->op_filp;
- open->op_filp = NULL;
- trace_nfsd_file_create(rqstp, access, nf);
- }
+ status = nfsd_file_acquire_opened(rqstp, cur_fh, access,
+ open->op_filp, &nf);
+ if (status != nfs_ok)
+ goto out_put_access;
spin_lock(&fp->fi_lock);
if (!fp->fi_fds[oflag]) {
* and check for delegations in the process of being recalled.
* If not found, create the nfs4_file struct
*/
- fp = find_or_add_file(open->op_file, current_fh);
+ fp = nfsd4_file_hash_insert(open->op_file, current_fh);
+ if (unlikely(!fp))
+ return nfserr_jukebox;
if (fp != open->op_file) {
status = nfs4_check_deleg(cl, open, &dp);
if (status)
list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) {
nf = stp->st_stid.sc_file;
- ctx = nf->fi_inode->i_flctx;
+ ctx = locks_inode_context(nf->fi_inode);
if (!ctx)
continue;
if (locks_owner_has_blockers(ctx, lo))
}
static void
-courtesy_client_reaper(struct work_struct *reaper)
+courtesy_client_reaper(struct nfsd_net *nn)
{
struct list_head reaplist;
- struct delayed_work *dwork = to_delayed_work(reaper);
- struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
- nfsd_shrinker_work);
nfs4_get_courtesy_client_reaplist(nn, &reaplist);
nfs4_process_client_reaplist(&reaplist);
}
+static void
+deleg_reaper(struct nfsd_net *nn)
+{
+ struct list_head *pos, *next;
+ struct nfs4_client *clp;
+ struct list_head cblist;
+
+ INIT_LIST_HEAD(&cblist);
+ spin_lock(&nn->client_lock);
+ list_for_each_safe(pos, next, &nn->client_lru) {
+ clp = list_entry(pos, struct nfs4_client, cl_lru);
+ if (clp->cl_state != NFSD4_ACTIVE ||
+ list_empty(&clp->cl_delegations) ||
+ atomic_read(&clp->cl_delegs_in_recall) ||
+ test_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags) ||
+ (ktime_get_boottime_seconds() -
+ clp->cl_ra_time < 5)) {
+ continue;
+ }
+ list_add(&clp->cl_ra_cblist, &cblist);
+
+ /* release in nfsd4_cb_recall_any_release */
+ atomic_inc(&clp->cl_rpc_users);
+ set_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags);
+ clp->cl_ra_time = ktime_get_boottime_seconds();
+ }
+ spin_unlock(&nn->client_lock);
+
+ while (!list_empty(&cblist)) {
+ clp = list_first_entry(&cblist, struct nfs4_client,
+ cl_ra_cblist);
+ list_del_init(&clp->cl_ra_cblist);
+ clp->cl_ra->ra_keep = 0;
+ clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG);
+ trace_nfsd_cb_recall_any(clp->cl_ra);
+ nfsd4_run_cb(&clp->cl_ra->ra_cb);
+ }
+}
+
+static void
+nfsd4_state_shrinker_worker(struct work_struct *work)
+{
+ struct nfsd_net *nn = container_of(work, struct nfsd_net,
+ nfsd_shrinker_work);
+
+ courtesy_client_reaper(nn);
+ deleg_reaper(nn);
+}
+
static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
{
if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
if (status)
goto put_stateid;
+ trace_nfsd_deleg_return(stateid);
wake_up_var(d_inode(cstate->current_fh.fh_dentry));
destroy_delegation(dp);
put_stateid:
}
inode = locks_inode(nf->nf_file);
- flctx = inode->i_flctx;
+ flctx = locks_inode_context(inode);
if (flctx && !list_empty_careful(&flctx->flc_posix)) {
spin_lock(&flctx->flc_lock);
INIT_LIST_HEAD(&nn->blocked_locks_lru);
INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
- INIT_DELAYED_WORK(&nn->nfsd_shrinker_work, courtesy_client_reaper);
+ INIT_WORK(&nn->nfsd_shrinker_work, nfsd4_state_shrinker_worker);
get_net(net);
+ nn->nfsd_client_shrinker.scan_objects = nfsd4_state_shrinker_scan;
+ nn->nfsd_client_shrinker.count_objects = nfsd4_state_shrinker_count;
+ nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS;
+
+ if (register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client"))
+ goto err_shrinker;
return 0;
+err_shrinker:
+ put_net(net);
+ kfree(nn->sessionid_hashtbl);
err_sessionid:
kfree(nn->unconf_id_hashtbl);
err_unconf_id:
{
int ret;
- ret = nfsd4_create_callback_queue();
+ ret = rhltable_init(&nfs4_file_rhltable, &nfs4_file_rhash_params);
if (ret)
return ret;
+ ret = nfsd4_create_callback_queue();
+ if (ret) {
+ rhltable_destroy(&nfs4_file_rhltable);
+ return ret;
+ }
+
set_max_delegations();
return 0;
}
struct list_head *pos, *next, reaplist;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ unregister_shrinker(&nn->nfsd_client_shrinker);
+ cancel_work(&nn->nfsd_shrinker_work);
cancel_delayed_work_sync(&nn->laundromat_work);
locks_end_grace(&nn->nfsd4_manager);
nfsd4_client_tracking_exit(net);
nfs4_state_destroy_net(net);
+ rhltable_destroy(&nfs4_file_rhltable);
#ifdef CONFIG_NFSD_V4_2_INTER_SSC
nfsd4_ssc_shutdown_umount(nn);
#endif
git.samba.org / sfrench / cifs-2.6.git / blobdiff