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From 36ce5f680149086b2feda220735255c2b31b0e00 Mon Sep 17 00:00:00 2001
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From: Max Reitz <mreitz@redhat.com>
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Date: Mon, 9 Jul 2018 15:11:21 +0200
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Subject: [PATCH 203/268] file-posix: Fix creation locking
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RH-Author: Max Reitz <mreitz@redhat.com>
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Message-id: <20180709151122.27541-2-mreitz@redhat.com>
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Patchwork-id: 81271
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O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH 1/2] file-posix: Fix creation locking
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Bugzilla: 1599335
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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RH-Acked-by: John Snow <jsnow@redhat.com>
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raw_apply_lock_bytes() takes a bit mask of "permissions that are NOT
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shared".
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Also, make the "perm" and "shared" variables uint64_t, because I do not
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particularly like using ~ on signed integers (and other permission masks
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are usually uint64_t, too).
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Reported-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit d815efcaf01b1698e2fdf0f3e125201025c53191)
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block/file-posix.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/block/file-posix.c b/block/file-posix.c
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index 0a9df5b..e876770 100644
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--- a/block/file-posix.c
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+++ b/block/file-posix.c
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@@ -2052,7 +2052,7 @@ static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
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{
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BlockdevCreateOptionsFile *file_opts;
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int fd;
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- int perm, shared;
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+ uint64_t perm, shared;
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int result = 0;
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/* Validate options and set default values */
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@@ -2088,7 +2088,7 @@ static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
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shared = BLK_PERM_ALL & ~BLK_PERM_RESIZE;
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/* Step one: Take locks */
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- result = raw_apply_lock_bytes(fd, perm, shared, false, errp);
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+ result = raw_apply_lock_bytes(fd, perm, ~shared, false, errp);
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if (result < 0) {
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goto out_close;
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}
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--
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1.8.3.1
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