From: Yanhu Cao <gmayyyha@gmail.com>
Date: Tue, 23 Mar 2021 03:29:33 +0000 (+0800)
Subject: client: rebuild bl to avoid too many vector(> IOV_MAX)
X-Git-Tag: v16.2.2~8^2~4^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=f55b707f090eaa82aaa9813ec3fa71dd6422cb71;p=ceph.git

client: rebuild bl to avoid too many vector(> IOV_MAX)

Fixes: https://tracker.ceph.com/issues/49936
Signed-off-by: Yanhu Cao <gmayyyha@gmail.com>
(cherry picked from commit 463dda7251aec1528f5796ea47956fba6e80fae1)
---

diff --git a/src/client/fuse_ll.cc b/src/client/fuse_ll.cc
index f88fdee3c558..d49c1fbeb848 100644
--- a/src/client/fuse_ll.cc
+++ b/src/client/fuse_ll.cc
@@ -673,6 +673,9 @@ static void fuse_ll_read(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
     size_t len;
     struct fuse_bufvec *bufv;
 
+    if (bl.get_num_buffers() > IOV_MAX)
+      bl.rebuild();
+
     bl.prepare_iov(&iov);
     len = sizeof(struct fuse_bufvec) + sizeof(struct fuse_buf) * (iov.size() - 1);
     bufv = (struct fuse_bufvec *)calloc(1, len);