From 1fff7707f278bdead2fdb958745961c988d4d377 Mon Sep 17 00:00:00 2001
From: Shreyas Siravara <sshreyas@fb.com>
Date: Thu, 26 Apr 2018 18:15:02 -0700
Subject: [PATCH] Add & export a call to initialize the pagecache

---
 include/nfsc/libnfs.h |  6 ++++++
 lib/libnfs.c          | 12 ++++++++++++
 lib/nfs_v3.c          | 13 +++----------
 3 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/include/nfsc/libnfs.h b/include/nfsc/libnfs.h
index 2f2406c9..09dcf1ce 100755
--- a/include/nfsc/libnfs.h
+++ b/include/nfsc/libnfs.h
@@ -278,6 +278,12 @@ EXTERN int nfs_set_version(struct nfs_context *nfs, int version);
 EXTERN void nfs_pagecache_invalidate(struct nfs_context *nfs,
                                      struct nfsfh *nfsfh);
 
+/*
+ * Initialize the pagecache
+ */
+EXTERN  void nfs_pagecache_init(struct nfs_context *nfs,
+                                struct nfsfh *nfsfh);
+
 /*
  * MOUNT THE EXPORT
  */
diff --git a/lib/libnfs.c b/lib/libnfs.c
index c122af52..28464145 100755
--- a/lib/libnfs.c
+++ b/lib/libnfs.c
@@ -199,6 +199,18 @@ nfs_pagecache_get(struct nfs_pagecache *pagecache, uint64_t offset)
 	return e->buf;
 }
 
+void nfs_pagecache_init(struct nfs_context *nfs, struct nfsfh *nfsfh) {
+	/* init page cache */
+	if (nfs->rpc->pagecache) {
+		nfsfh->pagecache.num_entries = nfs->rpc->pagecache;
+		nfsfh->pagecache.ttl = nfs->rpc->pagecache_ttl;
+		nfsfh->pagecache.entries = malloc(sizeof(struct nfs_pagecache_entry) * nfsfh->pagecache.num_entries);
+		nfs_pagecache_invalidate(nfs, nfsfh);
+		RPC_LOG(nfs->rpc, 2, "init pagecache entries %d pagesize %d\n",
+                        nfsfh->pagecache.num_entries, NFS_BLKSIZE);
+	}
+}
+
 void
 nfs_set_auth(struct nfs_context *nfs, struct AUTH *auth)
 {
diff --git a/lib/nfs_v3.c b/lib/nfs_v3.c
index ed8b929b..52908250 100644
--- a/lib/nfs_v3.c
+++ b/lib/nfs_v3.c
@@ -4917,20 +4917,13 @@ nfs3_open_cb(struct rpc_context *rpc, int status, void *command_data,
 		nfsfh->is_append = 1;
 	}
 
+    /* init the pagecache */
+    nfs_pagecache_init(nfs, nfsfh);
+
 	/* steal the filehandle */
 	nfsfh->fh = data->fh;
 	data->fh.val = NULL;
 
-	/* init page cache */
-	if (rpc->pagecache) {
-		nfsfh->pagecache.num_entries = rpc->pagecache;
-		nfsfh->pagecache.ttl = rpc->pagecache_ttl;
-		nfsfh->pagecache.entries = malloc(sizeof(struct nfs_pagecache_entry) * nfsfh->pagecache.num_entries);
-		nfs_pagecache_invalidate(nfs, nfsfh);
-		RPC_LOG(nfs->rpc, 2, "init pagecache entries %d pagesize %d\n",
-                        nfsfh->pagecache.num_entries, NFS_BLKSIZE);
-	}
-
 	data->cb(0, nfs, nfsfh, data->private_data);
 	free_nfs_cb_data(data);
 }