diff --git a/fs/ceph/crypto.h b/fs/ceph/crypto.h
index 1e08f8a64ad6..c85cb8c8bd79 100644
--- a/fs/ceph/crypto.h
+++ b/fs/ceph/crypto.h
@@ -83,6 +83,14 @@ static inline u32 ceph_fscrypt_auth_len(struct ceph_fscrypt_auth *fa)
  */
 #define CEPH_NOHASH_NAME_MAX (189 - SHA256_DIGEST_SIZE)
 
+/*
+ * The encrypted long snap name will be in format of
+ * "_${ENCRYPTED-LONG-SNAP-NAME}_${INODE-NUM}". And will set the max longth
+ * to sizeof('_') + NAME_MAX + sizeof('_') + max of sizeof(${INO}) + extra 7
+ * bytes to align the total size to 8 bytes.
+ */
+#define CEPH_ENCRYPTED_LONG_SNAP_NAME_MAX (1 + 255 + 1 + 16 + 7)
+
 void ceph_fscrypt_set_ops(struct super_block *sb);
 
 void ceph_fscrypt_free_dummy_policy(struct ceph_fs_client *fsc);
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 6df2a91af236..b30429e2d079 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -316,8 +316,7 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
 	int err;
 	unsigned frag = -1;
 	struct ceph_mds_reply_info_parsed *rinfo;
-	struct fscrypt_str tname = FSTR_INIT(NULL, 0);
-	struct fscrypt_str oname = FSTR_INIT(NULL, 0);
+	char *dentry_name = NULL;
 
 	dout("readdir %p file %p pos %llx\n", inode, file, ctx->pos);
 	if (dfi->file_info.flags & CEPH_F_ATEND)
@@ -369,14 +368,6 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
 		spin_unlock(&ci->i_ceph_lock);
 	}
 
-	err = ceph_fname_alloc_buffer(inode, &tname);
-	if (err < 0)
-		goto out;
-
-	err = ceph_fname_alloc_buffer(inode, &oname);
-	if (err < 0)
-		goto out;
-
 	/* proceed with a normal readdir */
 more:
 	/* do we have the correct frag content buffered? */
@@ -528,31 +519,39 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
 			}
 		}
 	}
+
+	dentry_name = kmalloc(CEPH_ENCRYPTED_LONG_SNAP_NAME_MAX, GFP_KERNEL);
+	if (!dentry_name) {
+		err = -ENOMEM;
+		ceph_mdsc_put_request(dfi->last_readdir);
+		dfi->last_readdir = NULL;
+		goto out;
+	}
+
 	for (; i < rinfo->dir_nr; i++) {
 		struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
-		struct ceph_fname fname = { .dir	= inode,
-					    .name	= rde->name,
-					    .name_len	= rde->name_len,
-					    .ctext	= rde->altname,
-					    .ctext_len	= rde->altname_len };
-		u32 olen = oname.len;
-
-		err = ceph_fname_to_usr(&fname, &tname, &oname, NULL);
-		if (err) {
-			pr_err("%s unable to decode %.*s, got %d\n", __func__,
-			       rde->name_len, rde->name, err);
-			goto out;
-		}
+		struct dentry *dn = rde->dentry;
+		int name_len;
 
 		BUG_ON(rde->offset < ctx->pos);
 		BUG_ON(!rde->inode.in);
+		BUG_ON(!rde->dentry);
 
 		ctx->pos = rde->offset;
-		dout("readdir (%d/%d) -> %llx '%.*s' %p\n",
-		     i, rinfo->dir_nr, ctx->pos,
-		     rde->name_len, rde->name, &rde->inode.in);
 
-		if (!dir_emit(ctx, oname.name, oname.len,
+		spin_lock(&dn->d_lock);
+		memcpy(dentry_name, dn->d_name.name, dn->d_name.len);
+		name_len = dn->d_name.len;
+		spin_unlock(&dn->d_lock);
+
+		dentry_name[name_len] = '\0';
+		dout("readdir (%d/%d) -> %llx '%s' %p\n",
+		     i, rinfo->dir_nr, ctx->pos, dentry_name, &rde->inode.in);
+
+		dput(dn);
+		rde->dentry = NULL;
+
+		if (!dir_emit(ctx, dentry_name, name_len,
 			      ceph_present_ino(inode->i_sb, le64_to_cpu(rde->inode.in->ino)),
 			      le32_to_cpu(rde->inode.in->mode) >> 12)) {
 			/*
@@ -566,8 +565,6 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
 			goto out;
 		}
 
-		/* Reset the lengths to their original allocated vals */
-		oname.len = olen;
 		ctx->pos++;
 	}
 
@@ -625,8 +622,8 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
 	err = 0;
 	dout("readdir %p file %p done.\n", inode, file);
 out:
-	ceph_fname_free_buffer(inode, &tname);
-	ceph_fname_free_buffer(inode, &oname);
+	if (dentry_name)
+		kfree(dentry_name);
 	return err;
 }
 
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index e5a9838981ba..dfb7b4461857 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1902,6 +1902,7 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req,
 			goto out;
 		}
 
+		rde->dentry = NULL;
 		dname.name = oname.name;
 		dname.len = oname.len;
 		dname.hash = full_name_hash(parent, dname.name, dname.len);
@@ -1962,6 +1963,12 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req,
 			goto retry_lookup;
 		}
 
+		/*
+		 * ceph_readdir will use the dentry to get the name
+		 * to avoid doing the dencrypt again there.
+		 */
+		rde->dentry = dget(dn);
+
 		/* inode */
 		if (d_really_is_positive(dn)) {
 			in = d_inode(dn);
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index f0d2442187a3..9de749dd715c 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -733,6 +733,8 @@ static void destroy_reply_info(struct ceph_mds_reply_info_parsed *info)
 
 		kfree(rde->inode.fscrypt_auth);
 		kfree(rde->inode.fscrypt_file);
+		dput(rde->dentry);
+		rde->dentry = NULL;
 	}
 	free_pages((unsigned long)info->dir_entries, get_order(info->dir_buf_size));
 }
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 0dfe24f94567..663d7754d57d 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -96,6 +96,7 @@ struct ceph_mds_reply_info_in {
 };
 
 struct ceph_mds_reply_dir_entry {
+	struct dentry		      *dentry;
 	char                          *name;
 	u8			      *altname;
 	u32                           name_len;
