Merge tag 'nfs-for-4.19-1' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull NFS client updates from Anna Schumaker:
 "These patches include adding async support for the v4.2 COPY
  operation. I think Bruce is planning to send the server patches for
  the next release, but I figured we could get the client side out of
  the way now since it's been in my tree for a while. This shouldn't
  cause any problems, since the server will still respond with
  synchronous copies even if the client requests async.

  Features:
   - Add support for asynchronous server-side COPY operations

  Stable bufixes:
   - Fix an off-by-one in bl_map_stripe() (v3.17+)
   - NFSv4 client live hangs after live data migration recovery (v4.9+)
   - xprtrdma: Fix disconnect regression (v4.18+)
   - Fix locking in pnfs_generic_recover_commit_reqs (v4.14+)
   - Fix a sleep in atomic context in nfs4_callback_sequence() (v4.9+)

  Other bugfixes and cleanups:
   - Optimizations and fixes involving NFS v4.1 / pNFS layout handling
   - Optimize lseek(fd, SEEK_CUR, 0) on directories to avoid locking
   - Immediately reschedule writeback when the server replies with an
     error
   - Fix excessive attribute revalidation in nfs_execute_ok()
   - Add error checking to nfs_idmap_prepare_message()
   - Use new vm_fault_t return type
   - Return a delegation when reclaiming one that the server has
     recalled
   - Referrals should inherit proto setting from parents
   - Make rpc_auth_create_args a const
   - Improvements to rpc_iostats tracking
   - Fix a potential reference leak when there is an error processing a
     callback
   - Fix rmdir / mkdir / rename nlink accounting
   - Fix updating inode change attribute
   - Fix error handling in nfsn4_sp4_select_mode()
   - Use an appropriate work queue for direct-write completion
   - Don't busy wait if NFSv4 session draining is interrupted"

* tag 'nfs-for-4.19-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (54 commits)
  pNFS: Remove unwanted optimisation of layoutget
  pNFS/flexfiles: ff_layout_pg_init_read should exit on error
  pNFS: Treat RECALLCONFLICT like DELAY...
  pNFS: When updating the stateid in layoutreturn, also update the recall range
  NFSv4: Fix a sleep in atomic context in nfs4_callback_sequence()
  NFSv4: Fix locking in pnfs_generic_recover_commit_reqs
  NFSv4: Fix a typo in nfs4_init_channel_attrs()
  NFSv4: Don't busy wait if NFSv4 session draining is interrupted
  NFS recover from destination server reboot for copies
  NFS add a simple sync nfs4_proc_commit after async COPY
  NFS handle COPY ERR_OFFLOAD_NO_REQS
  NFS send OFFLOAD_CANCEL when COPY killed
  NFS export nfs4_async_handle_error
  NFS handle COPY reply CB_OFFLOAD call race
  NFS add support for asynchronous COPY
  NFS COPY xdr handle async reply
  NFS OFFLOAD_CANCEL xdr
  NFS CB_OFFLOAD xdr
  NFS: Use an appropriate work queue for direct-write completion
  NFSv4: Fix error handling in nfs4_sp4_select_mode()
  ...

1 files changed, 18 insertions, 3 deletions

diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 979631411a0e..146e30862234 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -156,9 +156,23 @@ nfs4_shutdown_ds_clients(struct nfs_client *clp)
         }
 }
 
+static void
+nfs4_cleanup_callback(struct nfs_client *clp)
+{
+        struct nfs4_copy_state *cp_state;
+
+        while (!list_empty(&clp->pending_cb_stateids)) {
+                cp_state = list_entry(clp->pending_cb_stateids.next,
+                                        struct nfs4_copy_state, copies);
+                list_del(&cp_state->copies);
+                kfree(cp_state);
+        }
+}
+
 void nfs41_shutdown_client(struct nfs_client *clp)
 {
         if (nfs4_has_session(clp)) {
+                nfs4_cleanup_callback(clp);
                 nfs4_shutdown_ds_clients(clp);
                 nfs4_destroy_session(clp->cl_session);
                 nfs4_destroy_clientid(clp);
@@ -202,6 +216,7 @@ struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
 #if IS_ENABLED(CONFIG_NFS_V4_1)
         init_waitqueue_head(&clp->cl_lock_waitq);
 #endif
+        INIT_LIST_HEAD(&clp->pending_cb_stateids);
         return clp;
 
 error:
@@ -1127,7 +1142,7 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
         nfs_server_copy_userdata(server, parent_server);
 
         /* Get a client representation */
-#ifdef CONFIG_SUNRPC_XPRT_RDMA
+#if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA)
         rpc_set_port(data->addr, NFS_RDMA_PORT);
         error = nfs4_set_client(server, data->hostname,
                                 data->addr,
@@ -1139,7 +1154,7 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
                                 parent_client->cl_net);
         if (!error)
                 goto init_server;
-#endif  /* CONFIG_SUNRPC_XPRT_RDMA */
+#endif  /* IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) */
 
         rpc_set_port(data->addr, NFS_PORT);
         error = nfs4_set_client(server, data->hostname,
@@ -1153,7 +1168,7 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
         if (error < 0)
                 goto error;
 
-#ifdef CONFIG_SUNRPC_XPRT_RDMA
+#if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA)
 init_server:
 #endif
         error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);