pNFS: fill in nfs42_layoutstat_ops

Reviewed-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index ac929685350b9285cb4600667c9c9aa976cc53b4..a0530418255f5824dcbcee215db36ff1aeff19f2 100644 (file)
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -10,6 +10,11 @@
 #include <linux/nfs_fs.h>
 #include "nfs4_fs.h"
 #include "nfs42.h"
+#include "iostat.h"
+#include "pnfs.h"
+#include "internal.h"
+
+#define NFSDBG_FACILITY NFSDBG_PNFS
 
 static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file,
                                fmode_t fmode)
@@ -166,7 +171,44 @@ loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
        return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
 }
 
+static void
+nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
+{
+       struct nfs42_layoutstat_data *data = calldata;
+       struct nfs_server *server = NFS_SERVER(data->args.inode);
+
+       nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
+                            &data->res.seq_res, task);
+}
+
+static void
+nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
+{
+       struct nfs42_layoutstat_data *data = calldata;
+
+       if (!nfs4_sequence_done(task, &data->res.seq_res))
+               return;
+
+       /* well, we don't care about errors at all! */
+       if (task->tk_status)
+               dprintk("%s server returns %d\n", __func__, task->tk_status);
+}
+
+static void
+nfs42_layoutstat_release(void *calldata)
+{
+       struct nfs42_layoutstat_data *data = calldata;
+
+       pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
+       nfs_iput_and_deactive(data->inode);
+       kfree(data->args.devinfo);
+       kfree(data);
+}
+
 static const struct rpc_call_ops nfs42_layoutstat_ops = {
+       .rpc_call_prepare = nfs42_layoutstat_prepare,
+       .rpc_call_done = nfs42_layoutstat_done,
+       .rpc_release = nfs42_layoutstat_release,
 };
 
 int nfs42_proc_layoutstats_generic(struct nfs_server *server,
@@ -186,6 +228,11 @@ int nfs42_proc_layoutstats_generic(struct nfs_server *server,
        };
        struct rpc_task *task;
 
+       data->inode = nfs_igrab_and_active(data->args.inode);
+       if (!data->inode) {
+               nfs42_layoutstat_release(data);
+               return -EAGAIN;
+       }
        nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
        task = rpc_run_task(&task_setup);
        if (IS_ERR(task))