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From 1375d18f600b29111c7d8e6e5a2c73d01afe994b 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 15:11:22 +0200
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Subject: [PATCH 30/89] file-posix: Unlock FD after creation
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RH-Author: Max Reitz <mreitz@redhat.com>
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Message-id: <20180709151122.27541-3-mreitz@redhat.com>
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Patchwork-id: 81269
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O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH 2/2] file-posix: Unlock FD after creation
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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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Closing the FD does not necessarily mean that it is unlocked. Fix this
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by relinquishing all permission locks before qemu_close().
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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 7c20c808a5cbf5d244735bc78fc3138c739c1946)
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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 | 17 ++++++++++++++---
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1 file changed, 14 insertions(+), 3 deletions(-)
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diff --git a/block/file-posix.c b/block/file-posix.c
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index e876770..cbf7c11 100644
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--- a/block/file-posix.c
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+++ b/block/file-posix.c
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@@ -2051,6 +2051,7 @@ static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
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static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
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{
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BlockdevCreateOptionsFile *file_opts;
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+ Error *local_err = NULL;
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int fd;
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uint64_t perm, shared;
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int result = 0;
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@@ -2096,13 +2097,13 @@ static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
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/* Step two: Check that nobody else has taken conflicting locks */
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result = raw_check_lock_bytes(fd, perm, shared, errp);
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if (result < 0) {
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- goto out_close;
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+ goto out_unlock;
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}
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/* Clear the file by truncating it to 0 */
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result = raw_regular_truncate(fd, 0, PREALLOC_MODE_OFF, errp);
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if (result < 0) {
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- goto out_close;
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+ goto out_unlock;
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}
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if (file_opts->nocow) {
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@@ -2125,7 +2126,17 @@ static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
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result = raw_regular_truncate(fd, file_opts->size, file_opts->preallocation,
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errp);
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if (result < 0) {
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- goto out_close;
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+ goto out_unlock;
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+ }
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+
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+out_unlock:
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+ raw_apply_lock_bytes(fd, 0, 0, true, &local_err);
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+ if (local_err) {
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+ /* The above call should not fail, and if it does, that does
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+ * not mean the whole creation operation has failed. So
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+ * report it the user for their convenience, but do not report
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+ * it to the caller. */
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+ error_report_err(local_err);
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}
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out_close:
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--
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1.8.3.1
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