pNFS: Refactor nfs4_layoutget_release()

Move the actual freeing of the struct nfs4_layoutget into fs/nfs/pnfs.c
where it can be reused by the layoutget on open code.
Signed-off-by: NTrond Myklebust <trond.myklebust@hammerspace.com>

fs/nfs/nfs4proc.c

@@ -8692,58 +8692,13 @@ size_t max_response_pages(struct nfs_server *server)
 	return nfs_page_array_len(0, max_resp_sz);
 }
 
-static void nfs4_free_pages(struct page **pages, size_t size)
-{
-	int i;
-
-	if (!pages)
-		return;
-
-	for (i = 0; i < size; i++) {
-		if (!pages[i])
-			break;
-		__free_page(pages[i]);
-	}
-	kfree(pages);
-}
-
-struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
-{
-	struct page **pages;
-	int i;
-
-	pages = kcalloc(size, sizeof(struct page *), gfp_flags);
-	if (!pages) {
-		dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
-		return NULL;
-	}
-
-	for (i = 0; i < size; i++) {
-		pages[i] = alloc_page(gfp_flags);
-		if (!pages[i]) {
-			dprintk("%s: failed to allocate page\n", __func__);
-			nfs4_free_pages(pages, size);
-			return NULL;
-		}
-	}
-
-	return pages;
-}
-
 static void nfs4_layoutget_release(void *calldata)
 {
 	struct nfs4_layoutget *lgp = calldata;
-	struct inode *inode = lgp->args.inode;
-	size_t max_pages = lgp->args.layout.pglen / PAGE_SIZE;
 
 	dprintk("--> %s\n", __func__);
 	nfs4_sequence_free_slot(&lgp->res.seq_res);
-	nfs4_free_pages(lgp->args.layout.pages, max_pages);
-	if (inode)
-		pnfs_put_layout_hdr(NFS_I(inode)->layout);
-	put_rpccred(lgp->cred);
-	put_nfs_open_context(lgp->args.ctx);
-	kfree(calldata);
+	pnfs_layoutget_free(lgp);
 	dprintk("<-- %s\n", __func__);
 }
 

fs/nfs/pnfs.c

@@ -931,6 +931,44 @@ pnfs_find_server(struct inode *inode, struct nfs_open_context *ctx)
 	return server;
 }
 
+static void nfs4_free_pages(struct page **pages, size_t size)
+{
+	int i;
+
+	if (!pages)
+		return;
+
+	for (i = 0; i < size; i++) {
+		if (!pages[i])
+			break;
+		__free_page(pages[i]);
+	}
+	kfree(pages);
+}
+
+static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
+{
+	struct page **pages;
+	int i;
+
+	pages = kcalloc(size, sizeof(struct page *), gfp_flags);
+	if (!pages) {
+		dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
+		return NULL;
+	}
+
+	for (i = 0; i < size; i++) {
+		pages[i] = alloc_page(gfp_flags);
+		if (!pages[i]) {
+			dprintk("%s: failed to allocate page\n", __func__);
+			nfs4_free_pages(pages, size);
+			return NULL;
+		}
+	}
+
+	return pages;
+}
+
 static struct nfs4_layoutget *
 pnfs_alloc_init_layoutget_args(struct inode *ino,
 	   struct nfs_open_context *ctx,
@@ -982,6 +1020,18 @@ pnfs_alloc_init_layoutget_args(struct inode *ino,
 	return lgp;
 }
 
+void pnfs_layoutget_free(struct nfs4_layoutget *lgp)
+{
+	size_t max_pages = lgp->args.layout.pglen / PAGE_SIZE;
+
+	nfs4_free_pages(lgp->args.layout.pages, max_pages);
+	if (lgp->args.inode)
+		pnfs_put_layout_hdr(NFS_I(lgp->args.inode)->layout);
+	put_rpccred(lgp->cred);
+	put_nfs_open_context(lgp->args.ctx);
+	kfree(lgp);
+}
+
 static void pnfs_clear_layoutcommit(struct inode *inode,
 		struct list_head *head)
 {

fs/nfs/pnfs.h

@@ -227,7 +227,6 @@ extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
 
 /* nfs4proc.c */
 extern size_t max_response_pages(struct nfs_server *server);
-extern struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags);
 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
 				   struct pnfs_device *dev,
 				   struct rpc_cred *cred);
@@ -251,6 +250,7 @@ size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
 			    struct nfs_page *prev, struct nfs_page *req);
 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
+void pnfs_layoutget_free(struct nfs4_layoutget *lgp);
 void pnfs_free_lseg_list(struct list_head *tmp_list);
 void pnfs_destroy_layout(struct nfs_inode *);
 void pnfs_destroy_all_layouts(struct nfs_client *);