Merge branch 'pnfs-submit' of git://git.open-osd.org/linux-open-osd

* 'pnfs-submit' of git://git.open-osd.org/linux-open-osd: (32 commits)
  pnfs-obj: pg_test check for max_io_size
  NFSv4.1: define nfs_generic_pg_test
  NFSv4.1: use pnfs_generic_pg_test directly by layout driver
  NFSv4.1: change pg_test return type to bool
  NFSv4.1: unify pnfs_pageio_init functions
  pnfs-obj: objlayout_encode_layoutcommit implementation
  pnfs: encode_layoutcommit
  pnfs-obj: report errors and .encode_layoutreturn Implementation.
  pnfs: encode_layoutreturn
  pnfs: layoutret_on_setattr
  pnfs: layoutreturn
  pnfs-obj: osd raid engine read/write implementation
  pnfs: support for non-rpc layout drivers
  pnfs-obj: define per-inode private structure
  pnfs: alloc and free layout_hdr layoutdriver methods
  pnfs-obj: objio_osd device information retrieval and caching
  pnfs-obj: decode layout, alloc/free lseg
  pnfs-obj: pnfs_osd XDR client implementation
  pnfs-obj: pnfs_osd XDR definitions
  pnfs-obj: objlayoutdriver module skeleton
  ...

1 files changed, 95 insertions, 3 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d0e15dba7a5a..d2c4b59c896d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2363,6 +2363,9 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
         struct nfs4_state *state = NULL;
         int status;
 
+        if (pnfs_ld_layoutret_on_setattr(inode))
+                pnfs_return_layout(inode);
+
         nfs_fattr_init(fattr);
         
         /* Search for an existing open(O_WRITE) file */
@@ -3177,6 +3180,11 @@ static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
         return err;
 }
 
+void __nfs4_read_done_cb(struct nfs_read_data *data)
+{
+        nfs_invalidate_atime(data->inode);
+}
+
 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
 {
         struct nfs_server *server = NFS_SERVER(data->inode);
@@ -3186,7 +3194,7 @@ static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
                 return -EAGAIN;
         }
 
-        nfs_invalidate_atime(data->inode);
+        __nfs4_read_done_cb(data);
         if (task->tk_status > 0)
                 renew_lease(server, data->timestamp);
         return 0;
@@ -3200,7 +3208,8 @@ static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
         if (!nfs4_sequence_done(task, &data->res.seq_res))
                 return -EAGAIN;
 
-        return data->read_done_cb(task, data);
+        return data->read_done_cb ? data->read_done_cb(task, data) :
+                                    nfs4_read_done_cb(task, data);
 }
 
 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
@@ -3245,7 +3254,8 @@ static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
 {
         if (!nfs4_sequence_done(task, &data->res.seq_res))
                 return -EAGAIN;
-        return data->write_done_cb(task, data);
+        return data->write_done_cb ? data->write_done_cb(task, data) :
+                nfs4_write_done_cb(task, data);
 }
 
 /* Reset the the nfs_write_data to send the write to the MDS. */
@@ -5671,6 +5681,88 @@ int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
         return status;
 }
 
+static void
+nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
+{
+        struct nfs4_layoutreturn *lrp = calldata;
+
+        dprintk("--> %s\n", __func__);
+        if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
+                                &lrp->res.seq_res, 0, task))
+                return;
+        rpc_call_start(task);
+}
+
+static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
+{
+        struct nfs4_layoutreturn *lrp = calldata;
+        struct nfs_server *server;
+
+        dprintk("--> %s\n", __func__);
+
+        if (!nfs4_sequence_done(task, &lrp->res.seq_res))
+                return;
+
+        server = NFS_SERVER(lrp->args.inode);
+        if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
+                nfs_restart_rpc(task, lrp->clp);
+                return;
+        }
+        if (task->tk_status == 0) {
+                struct pnfs_layout_hdr *lo = NFS_I(lrp->args.inode)->layout;
+
+                if (lrp->res.lrs_present) {
+                        spin_lock(&lo->plh_inode->i_lock);
+                        pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
+                        spin_unlock(&lo->plh_inode->i_lock);
+                } else
+                        BUG_ON(!list_empty(&lo->plh_segs));
+        }
+        dprintk("<-- %s\n", __func__);
+}
+
+static void nfs4_layoutreturn_release(void *calldata)
+{
+        struct nfs4_layoutreturn *lrp = calldata;
+
+        dprintk("--> %s\n", __func__);
+        put_layout_hdr(NFS_I(lrp->args.inode)->layout);
+        kfree(calldata);
+        dprintk("<-- %s\n", __func__);
+}
+
+static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
+        .rpc_call_prepare = nfs4_layoutreturn_prepare,
+        .rpc_call_done = nfs4_layoutreturn_done,
+        .rpc_release = nfs4_layoutreturn_release,
+};
+
+int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
+{
+        struct rpc_task *task;
+        struct rpc_message msg = {
+                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
+                .rpc_argp = &lrp->args,
+                .rpc_resp = &lrp->res,
+        };
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = lrp->clp->cl_rpcclient,
+                .rpc_message = &msg,
+                .callback_ops = &nfs4_layoutreturn_call_ops,
+                .callback_data = lrp,
+        };
+        int status;
+
+        dprintk("--> %s\n", __func__);
+        task = rpc_run_task(&task_setup_data);
+        if (IS_ERR(task))
+                return PTR_ERR(task);
+        status = task->tk_status;
+        dprintk("<-- %s status=%d\n", __func__, status);
+        rpc_put_task(task);
+        return status;
+}
+
 static int
 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
 {