From 7574841aacc86ca8c6a1e156cb66b0950abbb58f Mon Sep 17 00:00:00 2001
From: anand76 <anand76@devvm4702.ftw0.facebook.com>
Date: Mon, 7 Mar 2022 11:39:31 -0800
Subject: [PATCH] Fix issue #9627 (#9657)

Summary:
SMB mounts do not support hard links. The ENOTSUP error code is
returned, which should be interpreted by PosixFileSystem as
IOStatus::NotSupported().

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9657

Reviewed By: mrambacher

Differential Revision: D34634783

Pulled By: anand1976

fbshipit-source-id: 0d57f5b2e6118e4c20e9ed1a293327428c3aecac
---
 env/fs_posix.cc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/env/fs_posix.cc b/env/fs_posix.cc
index e63381066..db5319615 100644
--- a/env/fs_posix.cc
+++ b/env/fs_posix.cc
@@ -753,8 +753,10 @@ class PosixFileSystem : public FileSystem {
                     const IOOptions& /*opts*/,
                     IODebugContext* /*dbg*/) override {
     if (link(src.c_str(), target.c_str()) != 0) {
-      if (errno == EXDEV) {
-        return IOStatus::NotSupported("No cross FS links allowed");
+      if (errno == EXDEV || errno == ENOTSUP) {
+        return IOStatus::NotSupported(errno == EXDEV
+                                          ? "No cross FS links allowed"
+                                          : "Links not supported by FS");
       }
       return IOError("while link file to " + target, src, errno);
     }