[PATCH v2 42/49] nfs41: add range to layoutreturn args

[Tom Haynes <thomas.haynes@primarydata.com>]

From: Peng Tao <tao.peng@primarydata.com>

So that callers can specify which range to return.

Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
---
 fs/nfs/nfs4xdr.c        |  6 +++---
 fs/nfs/pnfs.c           | 14 +++++++++-----
 include/linux/nfs_xdr.h |  2 +-
 3 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 3c3ff63..56d4c91 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -2012,11 +2012,11 @@ encode_layoutreturn(struct xdr_stream *xdr,
 	p = reserve_space(xdr, 16);
 	*p++ = cpu_to_be32(0);		/* reclaim. always 0 for now */
 	*p++ = cpu_to_be32(args->layout_type);
-	*p++ = cpu_to_be32(args->iomode);
+	*p++ = cpu_to_be32(args->range.iomode);
 	*p = cpu_to_be32(RETURN_FILE);
 	p = reserve_space(xdr, 16);
-	p = xdr_encode_hyper(p, 0);
-	p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
+	p = xdr_encode_hyper(p, args->range.offset);
+	p = xdr_encode_hyper(p, args->range.length);
 	spin_lock(&args->inode->i_lock);
 	encode_nfs4_stateid(xdr, &args->stateid);
 	spin_unlock(&args->inode->i_lock);
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 685af4f..63beace 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -52,7 +52,7 @@ static LIST_HEAD(pnfs_modules_tbl);
 
 static int
 pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid,
-		       enum pnfs_iomode iomode);
+		       enum pnfs_iomode iomode, u64 offset, u64 length);
 
 /* Return the registered pnfs layout driver module matching given id */
 static struct pnfs_layoutdriver_type *
@@ -392,7 +392,8 @@ pnfs_put_lseg(struct pnfs_layout_segment *lseg)
 		spin_unlock(&inode->i_lock);
 		pnfs_free_lseg(lseg);
 		if (need_return)
-			pnfs_send_layoutreturn(lo, stateid, iomode);
+			pnfs_send_layoutreturn(lo, stateid, iomode, 0,
+					       NFS4_MAX_UINT64);
 		else
 			pnfs_put_layout_hdr(lo);
 	}
@@ -897,7 +898,7 @@ static void pnfs_clear_layoutcommit(struct inode *inode,
 
 static int
 pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid,
-		       enum pnfs_iomode iomode)
+		       enum pnfs_iomode iomode, u64 offset, u64 length)
 {
 	struct inode *ino = lo->plh_inode;
 	struct nfs4_layoutreturn *lrp;
@@ -916,7 +917,9 @@ pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid,
 	lrp->args.stateid = stateid;
 	lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id;
 	lrp->args.inode = ino;
-	lrp->args.iomode = iomode;
+	lrp->args.range.iomode = iomode;
+	lrp->args.range.offset = offset;
+	lrp->args.range.length = length;
 	lrp->args.layout = lo;
 	lrp->clp = NFS_SERVER(ino)->nfs_client;
 	lrp->cred = lo->plh_lc_cred;
@@ -987,7 +990,8 @@ _pnfs_return_layout(struct inode *ino)
 	spin_unlock(&ino->i_lock);
 	pnfs_free_lseg_list(&tmp_list);
 
-	status = pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY);
+	status = pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, 0,
+					NFS4_MAX_UINT64);
 out:
 	dprintk("<-- %s status: %d\n", __func__, status);
 	return status;
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 6400a1e..3637923 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -293,7 +293,7 @@ struct nfs4_layoutreturn_args {
 	struct nfs4_sequence_args seq_args;
 	struct pnfs_layout_hdr *layout;
 	struct inode *inode;
-	enum pnfs_iomode iomode;
+	struct pnfs_layout_range range;
 	nfs4_stateid stateid;
 	__u32   layout_type;
 };
-- 
1.9.3