* effort to decrease the scope of the client_mutex, this spinlock may
* eventually cover more:
*/
-static DEFINE_SPINLOCK(recall_lock);
+static DEFINE_SPINLOCK(state_lock);
-static struct kmem_cache *openowner_slab = NULL;
-static struct kmem_cache *lockowner_slab = NULL;
-static struct kmem_cache *file_slab = NULL;
-static struct kmem_cache *stateid_slab = NULL;
-static struct kmem_cache *deleg_slab = NULL;
+static struct kmem_cache *openowner_slab;
+static struct kmem_cache *lockowner_slab;
+static struct kmem_cache *file_slab;
+static struct kmem_cache *stateid_slab;
+static struct kmem_cache *deleg_slab;
void
nfs4_lock_state(void)
static inline void
put_nfs4_file(struct nfs4_file *fi)
{
- if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) {
+ if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) {
hlist_del(&fi->fi_hash);
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
iput(fi->fi_inode);
nfsd4_free_file(fi);
}
dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
if (dp == NULL)
return dp;
- dp->dl_stid.sc_type = NFS4_DELEG_STID;
/*
* delegation seqid's are never incremented. The 4.1 special
* meaning of seqid 0 isn't meaningful, really, but let's avoid
static void nfs4_put_deleg_lease(struct nfs4_file *fp)
{
+ if (!fp->fi_lease)
+ return;
if (atomic_dec_and_test(&fp->fi_delegees)) {
vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
fp->fi_lease = NULL;
s->sc_type = 0;
}
+static void
+hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
+{
+ lockdep_assert_held(&state_lock);
+
+ dp->dl_stid.sc_type = NFS4_DELEG_STID;
+ list_add(&dp->dl_perfile, &fp->fi_delegations);
+ list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
+}
+
/* Called under the state lock. */
static void
unhash_delegation(struct nfs4_delegation *dp)
{
+ spin_lock(&state_lock);
list_del_init(&dp->dl_perclnt);
- spin_lock(&recall_lock);
list_del_init(&dp->dl_perfile);
list_del_init(&dp->dl_recall_lru);
- spin_unlock(&recall_lock);
- nfs4_put_deleg_lease(dp->dl_file);
- put_nfs4_file(dp->dl_file);
- dp->dl_file = NULL;
+ spin_unlock(&state_lock);
+ if (dp->dl_file) {
+ nfs4_put_deleg_lease(dp->dl_file);
+ put_nfs4_file(dp->dl_file);
+ dp->dl_file = NULL;
+ }
}
}
}
+static void nfs4_free_lockowner(struct nfs4_lockowner *lo)
+{
+ kfree(lo->lo_owner.so_owner.data);
+ kmem_cache_free(lockowner_slab, lo);
+}
+
static void release_lockowner(struct nfs4_lockowner *lo)
{
unhash_lockowner(lo);
}
}
+static void nfs4_free_openowner(struct nfs4_openowner *oo)
+{
+ kfree(oo->oo_owner.so_owner.data);
+ kmem_cache_free(openowner_slab, oo);
+}
+
static void release_openowner(struct nfs4_openowner *oo)
{
unhash_openowner(oo);
return clp;
}
-static inline void
+static void
free_client(struct nfs4_client *clp)
{
struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id);
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
INIT_LIST_HEAD(&reaplist);
- spin_lock(&recall_lock);
+ spin_lock(&state_lock);
while (!list_empty(&clp->cl_delegations)) {
dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
list_del_init(&dp->dl_perclnt);
list_move(&dp->dl_recall_lru, &reaplist);
}
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
while (!list_empty(&reaplist)) {
dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
destroy_delegation(dp);
void
nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
{
+ struct xdr_buf *buf = resp->xdr.buf;
struct nfsd4_slot *slot = resp->cstate.slot;
unsigned int base;
slot->sl_datalen = 0;
return;
}
- slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap;
- base = (char *)resp->cstate.datap -
- (char *)resp->xbuf->head[0].iov_base;
- if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data,
- slot->sl_datalen))
+ base = resp->cstate.data_offset;
+ slot->sl_datalen = buf->len - base;
+ if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
WARN("%s: sessions DRC could not cache compound\n", __func__);
return;
}
struct nfsd4_sequence *seq)
{
struct nfsd4_slot *slot = resp->cstate.slot;
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
__be32 status;
dprintk("--> %s slot %p\n", __func__, slot);
if (status)
return status;
- /* The sequence operation has been encoded, cstate->datap set. */
- memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen);
+ p = xdr_reserve_space(xdr, slot->sl_datalen);
+ if (!p) {
+ WARN_ON_ONCE(1);
+ return nfserr_serverfault;
+ }
+ xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
+ xdr_commit_encode(xdr);
resp->opcnt = slot->sl_opcnt;
- resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen);
- status = slot->sl_status;
-
- return status;
+ return slot->sl_status;
}
/*
struct nfsd4_sequence *seq)
{
struct nfsd4_compoundres *resp = rqstp->rq_resp;
+ struct xdr_stream *xdr = &resp->xdr;
struct nfsd4_session *session;
struct nfs4_client *clp;
struct nfsd4_slot *slot;
struct nfsd4_conn *conn;
__be32 status;
+ int buflen;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
if (resp->opcnt != 1)
if (status)
goto out_put_session;
+ buflen = (seq->cachethis) ?
+ session->se_fchannel.maxresp_cached :
+ session->se_fchannel.maxresp_sz;
+ status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
+ nfserr_rep_too_big;
+ if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
+ goto out_put_session;
+ svc_reserve(rqstp, buflen);
+
+ status = nfs_ok;
/* Success! bump slot seqid */
slot->sl_seqid = seq->seqid;
slot->sl_flags |= NFSD4_SLOT_INUSE;
fp->fi_lease = NULL;
memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
memset(fp->fi_access, 0, sizeof(fp->fi_access));
- spin_lock(&recall_lock);
+ spin_lock(&state_lock);
hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]);
- spin_unlock(&recall_lock);
-}
-
-static void
-nfsd4_free_slab(struct kmem_cache **slab)
-{
- if (*slab == NULL)
- return;
- kmem_cache_destroy(*slab);
- *slab = NULL;
+ spin_unlock(&state_lock);
}
void
nfsd4_free_slabs(void)
{
- nfsd4_free_slab(&openowner_slab);
- nfsd4_free_slab(&lockowner_slab);
- nfsd4_free_slab(&file_slab);
- nfsd4_free_slab(&stateid_slab);
- nfsd4_free_slab(&deleg_slab);
+ kmem_cache_destroy(openowner_slab);
+ kmem_cache_destroy(lockowner_slab);
+ kmem_cache_destroy(file_slab);
+ kmem_cache_destroy(stateid_slab);
+ kmem_cache_destroy(deleg_slab);
}
int
openowner_slab = kmem_cache_create("nfsd4_openowners",
sizeof(struct nfs4_openowner), 0, 0, NULL);
if (openowner_slab == NULL)
- goto out_nomem;
+ goto out;
lockowner_slab = kmem_cache_create("nfsd4_lockowners",
sizeof(struct nfs4_lockowner), 0, 0, NULL);
if (lockowner_slab == NULL)
- goto out_nomem;
+ goto out_free_openowner_slab;
file_slab = kmem_cache_create("nfsd4_files",
sizeof(struct nfs4_file), 0, 0, NULL);
if (file_slab == NULL)
- goto out_nomem;
+ goto out_free_lockowner_slab;
stateid_slab = kmem_cache_create("nfsd4_stateids",
sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
if (stateid_slab == NULL)
- goto out_nomem;
+ goto out_free_file_slab;
deleg_slab = kmem_cache_create("nfsd4_delegations",
sizeof(struct nfs4_delegation), 0, 0, NULL);
if (deleg_slab == NULL)
- goto out_nomem;
+ goto out_free_stateid_slab;
return 0;
-out_nomem:
- nfsd4_free_slabs();
+
+out_free_stateid_slab:
+ kmem_cache_destroy(stateid_slab);
+out_free_file_slab:
+ kmem_cache_destroy(file_slab);
+out_free_lockowner_slab:
+ kmem_cache_destroy(lockowner_slab);
+out_free_openowner_slab:
+ kmem_cache_destroy(openowner_slab);
+out:
dprintk("nfsd4: out of memory while initializing nfsv4\n");
return -ENOMEM;
}
-void nfs4_free_openowner(struct nfs4_openowner *oo)
-{
- kfree(oo->oo_owner.so_owner.data);
- kmem_cache_free(openowner_slab, oo);
-}
-
-void nfs4_free_lockowner(struct nfs4_lockowner *lo)
-{
- kfree(lo->lo_owner.so_owner.data);
- kmem_cache_free(lockowner_slab, lo);
-}
-
static void init_nfs4_replay(struct nfs4_replay *rp)
{
rp->rp_status = nfserr_serverfault;
unsigned int hashval = file_hashval(ino);
struct nfs4_file *fp;
- spin_lock(&recall_lock);
+ spin_lock(&state_lock);
hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
if (fp->fi_inode == ino) {
get_nfs4_file(fp);
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
return fp;
}
}
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
return NULL;
}
struct nfs4_client *clp = dp->dl_stid.sc_client;
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+ lockdep_assert_held(&state_lock);
/* We're assuming the state code never drops its reference
* without first removing the lease. Since we're in this lease
* callback (and since the lease code is serialized by the kernel
*/
fl->fl_break_time = 0;
- spin_lock(&recall_lock);
+ spin_lock(&state_lock);
fp->fi_had_conflict = true;
list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
nfsd_break_one_deleg(dp);
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
}
static
status = vfs_setlease(fl->fl_file, fl->fl_type, &fl);
if (status)
goto out_free;
- list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
fp->fi_lease = fl;
fp->fi_deleg_file = get_file(fl->fl_file);
atomic_set(&fp->fi_delegees, 1);
- list_add(&dp->dl_perfile, &fp->fi_delegations);
+ spin_lock(&state_lock);
+ hash_delegation_locked(dp, fp);
+ spin_unlock(&state_lock);
return 0;
out_free:
locks_free_lock(fl);
static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp)
{
- int status;
-
if (fp->fi_had_conflict)
return -EAGAIN;
get_nfs4_file(fp);
dp->dl_file = fp;
- if (!fp->fi_lease) {
- status = nfs4_setlease(dp);
- if (status)
- goto out_free;
- return 0;
- }
- spin_lock(&recall_lock);
+ if (!fp->fi_lease)
+ return nfs4_setlease(dp);
+ spin_lock(&state_lock);
+ atomic_inc(&fp->fi_delegees);
if (fp->fi_had_conflict) {
- spin_unlock(&recall_lock);
- status = -EAGAIN;
- goto out_free;
+ spin_unlock(&state_lock);
+ return -EAGAIN;
}
- atomic_inc(&fp->fi_delegees);
- list_add(&dp->dl_perfile, &fp->fi_delegations);
- spin_unlock(&recall_lock);
- list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
+ hash_delegation_locked(dp, fp);
+ spin_unlock(&state_lock);
return 0;
-out_free:
- put_nfs4_file(fp);
- dp->dl_file = fp;
- return status;
}
static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
return;
out_free:
- remove_stid(&dp->dl_stid);
- nfs4_put_delegation(dp);
+ destroy_delegation(dp);
out_no_deleg:
open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
struct nfs4_delegation *dp;
struct list_head *pos, *next, reaplist;
time_t cutoff = get_seconds() - nn->nfsd4_lease;
- time_t t, clientid_val = nn->nfsd4_lease;
- time_t u, test_val = nn->nfsd4_lease;
+ time_t t, new_timeo = nn->nfsd4_lease;
nfs4_lock_state();
clp = list_entry(pos, struct nfs4_client, cl_lru);
if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
t = clp->cl_time - cutoff;
- if (clientid_val > t)
- clientid_val = t;
+ new_timeo = min(new_timeo, t);
break;
}
if (mark_client_expired_locked(clp)) {
clp->cl_clientid.cl_id);
expire_client(clp);
}
- spin_lock(&recall_lock);
+ spin_lock(&state_lock);
list_for_each_safe(pos, next, &nn->del_recall_lru) {
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn)
continue;
if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
- u = dp->dl_time - cutoff;
- if (test_val > u)
- test_val = u;
+ t = dp->dl_time - cutoff;
+ new_timeo = min(new_timeo, t);
break;
}
list_move(&dp->dl_recall_lru, &reaplist);
}
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
list_for_each_safe(pos, next, &reaplist) {
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
revoke_delegation(dp);
}
- test_val = nn->nfsd4_lease;
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)) {
- u = oo->oo_time - cutoff;
- if (test_val > u)
- test_val = u;
+ t = oo->oo_time - cutoff;
+ new_timeo = min(new_timeo, t);
break;
}
release_openowner(oo);
}
- if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
- clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
+ new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
nfs4_unlock_state();
- return clientid_val;
+ return new_timeo;
}
static struct workqueue_struct *laundry_wq;
struct svc_fh *current_fh = &cstate->current_fh;
struct inode *ino = current_fh->fh_dentry->d_inode;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct file *file = NULL;
__be32 status;
if (filpp)
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
return check_special_stateids(net, current_fh, stateid, flags);
+ nfs4_lock_state();
+
status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
&s, cstate->minorversion, nn);
if (status)
- return status;
+ goto out;
status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
if (status)
goto out;
if (status)
goto out;
if (filpp) {
- *filpp = dp->dl_file->fi_deleg_file;
- if (!*filpp) {
+ file = dp->dl_file->fi_deleg_file;
+ if (!file) {
WARN_ON_ONCE(1);
status = nfserr_serverfault;
goto out;
goto out;
if (filpp) {
if (flags & RD_STATE)
- *filpp = find_readable_file(stp->st_file);
+ file = find_readable_file(stp->st_file);
else
- *filpp = find_writeable_file(stp->st_file);
+ file = find_writeable_file(stp->st_file);
}
break;
default:
- return nfserr_bad_stateid;
+ status = nfserr_bad_stateid;
+ goto out;
}
status = nfs_ok;
+ if (file)
+ *filpp = get_file(file);
out:
+ nfs4_unlock_state();
return status;
}
* correspondance, and we have to delete the lockowner when we
* delete the lock stateid:
*/
- unhash_lockowner(lo);
+ release_lockowner(lo);
return nfs_ok;
}
struct nfs4_delegation *dp, *next;
u64 count = 0;
+ lockdep_assert_held(&state_lock);
list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
if (victims)
list_move(&dp->dl_recall_lru, victims);
LIST_HEAD(victims);
u64 count;
- spin_lock(&recall_lock);
+ spin_lock(&state_lock);
count = nfsd_find_all_delegations(clp, max, &victims);
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
revoke_delegation(dp);
LIST_HEAD(victims);
u64 count;
- spin_lock(&recall_lock);
+ spin_lock(&state_lock);
count = nfsd_find_all_delegations(clp, max, &victims);
list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
nfsd_break_one_deleg(dp);
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
return count;
}
{
u64 count = 0;
- spin_lock(&recall_lock);
+ spin_lock(&state_lock);
count = nfsd_find_all_delegations(clp, max, NULL);
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
nfsd_print_count(clp, count, "delegations");
return count;
#endif /* CONFIG_NFSD_FAULT_INJECTION */
-/* initialization to perform at module load time: */
-
-void
-nfs4_state_init(void)
-{
-}
-
/*
* Since the lifetime of a delegation isn't limited to that of an open, a
* client may quite reasonably hang on to a delegation as long as it has
nfs4_lock_state();
INIT_LIST_HEAD(&reaplist);
- spin_lock(&recall_lock);
+ spin_lock(&state_lock);
list_for_each_safe(pos, next, &nn->del_recall_lru) {
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
list_move(&dp->dl_recall_lru, &reaplist);
}
- spin_unlock(&recall_lock);
+ spin_unlock(&state_lock);
list_for_each_safe(pos, next, &reaplist) {
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
destroy_delegation(dp);
projects / firefly-linux-kernel-4.4.55.git / blobdiff