diff options
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4callback.c | 34 | ||||
| -rw-r--r-- | fs/nfsd/nfs4state.c | 1 | ||||
| -rw-r--r-- | fs/nfsd/state.h | 3 |
3 files changed, 32 insertions, 6 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 69955e98e086..f1d9dd45553a 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -639,6 +639,10 @@ static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata) if (!nfsd41_cb_get_slot(clp, task)) return; } + cb->cb_done = false; + spin_lock(&clp->cl_lock); + list_add(&cb->cb_per_client, &clp->cl_callbacks); + spin_unlock(&clp->cl_lock); rpc_call_start(task); } @@ -681,8 +685,11 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata) return; } + if (cb->cb_done) + return; switch (task->tk_status) { case 0: + cb->cb_done = true; return; case -EBADHANDLE: case -NFS4ERR_BAD_STATEID: @@ -695,7 +702,7 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata) if (current_rpc_client != task->tk_client) { /* queue a callback on the new connection: */ atomic_inc(&dp->dl_count); - nfsd4_cb_recall(dp); + run_nfsd4_cb(&dp->dl_recall); return; } } @@ -704,16 +711,23 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata) task->tk_status = 0; rpc_restart_call_prepare(task); return; - } else - nfsd4_mark_cb_down(clp, task->tk_status); + } + nfsd4_mark_cb_down(clp, task->tk_status); + cb->cb_done = true; } static void nfsd4_cb_recall_release(void *calldata) { struct nfsd4_callback *cb = calldata; + struct nfs4_client *clp = cb->cb_clp; struct nfs4_delegation *dp = container_of(cb, struct nfs4_delegation, dl_recall); - nfs4_put_delegation(dp); + if (cb->cb_done) { + spin_lock(&clp->cl_lock); + list_del(&cb->cb_per_client); + spin_unlock(&clp->cl_lock); + nfs4_put_delegation(dp); + } } static const struct rpc_call_ops nfsd4_cb_recall_ops = { @@ -808,8 +822,13 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb) spin_unlock(&clp->cl_lock); err = setup_callback_client(clp, &conn, ses); - if (err) + if (err) { warn_no_callback_path(clp, err); + return; + } + /* Yay, the callback channel's back! Restart any callbacks: */ + list_for_each_entry(cb, &clp->cl_callbacks, cb_per_client) + run_nfsd4_cb(cb); } void nfsd4_do_callback_rpc(struct work_struct *w) @@ -834,10 +853,11 @@ void nfsd4_do_callback_rpc(struct work_struct *w) void nfsd4_cb_recall(struct nfs4_delegation *dp) { struct nfsd4_callback *cb = &dp->dl_recall; + struct nfs4_client *clp = dp->dl_client; dp->dl_retries = 1; cb->cb_op = dp; - cb->cb_clp = dp->dl_client; + cb->cb_clp = clp; cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL]; cb->cb_msg.rpc_argp = cb; cb->cb_msg.rpc_resp = cb; @@ -846,5 +866,7 @@ void nfsd4_cb_recall(struct nfs4_delegation *dp) cb->cb_ops = &nfsd4_cb_recall_ops; dp->dl_retries = 1; + cb->cb_done = true; + run_nfsd4_cb(&dp->dl_recall); } diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 408957cf6016..6e1f9aadd439 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1077,6 +1077,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, INIT_LIST_HEAD(&clp->cl_openowners); INIT_LIST_HEAD(&clp->cl_delegations); INIT_LIST_HEAD(&clp->cl_lru); + INIT_LIST_HEAD(&clp->cl_callbacks); spin_lock_init(&clp->cl_lock); INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); clp->cl_time = get_seconds(); diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 4e5bdfd9169c..3074656ba7bf 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -68,10 +68,12 @@ typedef struct { struct nfsd4_callback { void *cb_op; struct nfs4_client *cb_clp; + struct list_head cb_per_client; u32 cb_minorversion; struct rpc_message cb_msg; const struct rpc_call_ops *cb_ops; struct work_struct cb_work; + bool cb_done; }; struct nfs4_delegation { @@ -248,6 +250,7 @@ struct nfs4_client { int cl_cb_state; struct nfsd4_callback cl_cb_null; struct nfsd4_session *cl_cb_session; + struct list_head cl_callbacks; /* list of in-progress callbacks */ /* for all client information that callback code might need: */ spinlock_t cl_lock; |