NFS: Cleanup - rename NFS_LAYOUT_RETURN_BEFORE_CLOSE

NFS_LAYOUT_RETURN_BEFORE_CLOSE is being used to signal that a
layoutreturn is needed, either due to a layout recall or to a
layout error. Rename it to NFS_LAYOUT_RETURN_REQUESTED in order
to clarify its purpose.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/flexfilelayout/flexfilelayout.c

@@ -1215,7 +1215,7 @@ static int ff_layout_read_done_cb(struct rpc_task *task,
 					hdr->pgio_mirror_idx + 1,
 					&hdr->pgio_mirror_idx))
 			goto out_eagain;
-		set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+		set_bit(NFS_LAYOUT_RETURN_REQUESTED,
 			&hdr->lseg->pls_layout->plh_flags);
 		pnfs_read_resend_pnfs(hdr);
 		return task->tk_status;

fs/nfs/flexfilelayout/flexfilelayoutdev.c

@@ -412,7 +412,7 @@ nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,
 					 OP_ILLEGAL, GFP_NOIO);
 		if (!fail_return) {
 			if (ff_layout_has_available_ds(lseg))
-				set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+				set_bit(NFS_LAYOUT_RETURN_REQUESTED,
 					&lseg->pls_layout->plh_flags);
 			else
 				pnfs_error_mark_layout_for_return(ino, lseg);

fs/nfs/pnfs.c

@@ -885,7 +885,7 @@ pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo)
 		return false;
 	lo->plh_return_iomode = 0;
 	pnfs_get_layout_hdr(lo);
-	clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
+	clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
 	return true;
 }
 
@@ -929,7 +929,7 @@ pnfs_layout_need_return(struct pnfs_layout_hdr *lo)
 {
 	struct pnfs_layout_segment *s;
 
-	if (!test_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags))
+	if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
 		return false;
 
 	/* Defer layoutreturn until all lsegs are done */
@@ -945,7 +945,7 @@ static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo)
 {
 	struct inode *inode= lo->plh_inode;
 
-	if (!test_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags))
+	if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
 		return;
 	spin_lock(&inode->i_lock);
 	if (pnfs_layout_need_return(lo)) {
@@ -1085,7 +1085,7 @@ bool pnfs_roc(struct inode *ino)
 
 	nfs4_stateid_copy(&stateid, &lo->plh_stateid);
 	/* always send layoutreturn if being marked so */
-	if (test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+	if (test_and_clear_bit(NFS_LAYOUT_RETURN_REQUESTED,
 				   &lo->plh_flags))
 		layoutreturn = pnfs_prepare_layoutreturn(lo);
 
@@ -1766,7 +1766,7 @@ pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
 			pnfs_set_plh_return_iomode(lo, return_range->iomode);
 			if (!mark_lseg_invalid(lseg, tmp_list))
 				remaining++;
-			set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+			set_bit(NFS_LAYOUT_RETURN_REQUESTED,
 					&lo->plh_flags);
 		}
 	return remaining;

fs/nfs/pnfs.h

@@ -94,8 +94,8 @@ enum {
 	NFS_LAYOUT_RO_FAILED = 0,	/* get ro layout failed stop trying */
 	NFS_LAYOUT_RW_FAILED,		/* get rw layout failed stop trying */
 	NFS_LAYOUT_BULK_RECALL,		/* bulk recall affecting layout */
-	NFS_LAYOUT_RETURN,		/* Return this layout ASAP */
-	NFS_LAYOUT_RETURN_BEFORE_CLOSE,	/* Return this layout before close */
+	NFS_LAYOUT_RETURN,		/* layoutreturn in progress */
+	NFS_LAYOUT_RETURN_REQUESTED,	/* Return this layout ASAP */
 	NFS_LAYOUT_INVALID_STID,	/* layout stateid id is invalid */
 	NFS_LAYOUT_FIRST_LAYOUTGET,	/* Serialize first layoutget */
 };