From 19452491c1ec03ce4eef24388ec24076eb306377 Mon Sep 17 00:00:00 2001
From: Max Reitz <mreitz@redhat.com>
Date: Mon, 9 Jul 2018 15:11:21 +0200
Subject: [PATCH 29/89] file-posix: Fix creation locking

RH-Author: Max Reitz <mreitz@redhat.com>
Message-id: <20180709151122.27541-2-mreitz@redhat.com>
Patchwork-id: 81271
O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH 1/2] file-posix: Fix creation locking
Bugzilla: 1599335
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: John Snow <jsnow@redhat.com>

raw_apply_lock_bytes() takes a bit mask of "permissions that are NOT
shared".

Also, make the "perm" and "shared" variables uint64_t, because I do not
particularly like using ~ on signed integers (and other permission masks
are usually uint64_t, too).

Reported-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit d815efcaf01b1698e2fdf0f3e125201025c53191)
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 block/file-posix.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/file-posix.c b/block/file-posix.c
index 0a9df5b..e876770 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2052,7 +2052,7 @@ static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
 {
     BlockdevCreateOptionsFile *file_opts;
     int fd;
-    int perm, shared;
+    uint64_t perm, shared;
     int result = 0;
 
     /* Validate options and set default values */
@@ -2088,7 +2088,7 @@ static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
     shared = BLK_PERM_ALL & ~BLK_PERM_RESIZE;
 
     /* Step one: Take locks */
-    result = raw_apply_lock_bytes(fd, perm, shared, false, errp);
+    result = raw_apply_lock_bytes(fd, perm, ~shared, false, errp);
     if (result < 0) {
         goto out_close;
     }
-- 
1.8.3.1