From: Kevin Wolf <kwolf@redhat.com>
To: qemu-devel@nongnu.org
Cc: kwolf@redhat.com, stefanha@redhat.com
Subject: [Qemu-devel] [PATCH 12/20] qed: Handle failure for potentially large allocations
Date: Wed, 21 May 2014 18:28:10 +0200 [thread overview]
Message-ID: <1400689698-3096-13-git-send-email-kwolf@redhat.com> (raw)
In-Reply-To: <1400689698-3096-1-git-send-email-kwolf@redhat.com>
Some code in the block layer makes potentially huge allocations. Failure
is not completely unexpected there, so avoid aborting qemu and handle
out-of-memory situations gracefully.
This patch addresses the allocations in the qed block driver.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/qed-check.c | 7 +++++--
block/qed.c | 6 +++++-
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/block/qed-check.c b/block/qed-check.c
index b473dcd..40a882c 100644
--- a/block/qed-check.c
+++ b/block/qed-check.c
@@ -227,8 +227,11 @@ int qed_check(BDRVQEDState *s, BdrvCheckResult *result, bool fix)
};
int ret;
- check.used_clusters = g_malloc0(((check.nclusters + 31) / 32) *
- sizeof(check.used_clusters[0]));
+ check.used_clusters = g_try_malloc0(((check.nclusters + 31) / 32) *
+ sizeof(check.used_clusters[0]));
+ if (check.nclusters && check.used_clusters == NULL) {
+ return -ENOMEM;
+ }
check.result->bfi.total_clusters =
(s->header.image_size + s->header.cluster_size - 1) /
diff --git a/block/qed.c b/block/qed.c
index c130e42..f0943d6 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1208,7 +1208,11 @@ static void qed_aio_write_inplace(QEDAIOCB *acb, uint64_t offset, size_t len)
struct iovec *iov = acb->qiov->iov;
if (!iov->iov_base) {
- iov->iov_base = qemu_blockalign(acb->common.bs, iov->iov_len);
+ iov->iov_base = qemu_try_blockalign(acb->common.bs, iov->iov_len);
+ if (iov->iov_base == NULL) {
+ qed_aio_complete(acb, -ENOMEM);
+ return;
+ }
memset(iov->iov_base, 0, iov->iov_len);
}
}
--
1.8.3.1
next prev parent reply other threads:[~2014-05-21 16:28 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-21 16:27 [Qemu-devel] [PATCH 00/20] block: Handle failure for potentially large allocations Kevin Wolf
2014-05-21 16:27 ` [Qemu-devel] [PATCH 01/20] block: Introduce qemu_try_blockalign() Kevin Wolf
2014-05-22 15:50 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 02/20] block: Handle failure for potentially large allocations Kevin Wolf
2014-05-22 15:50 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 03/20] bochs: " Kevin Wolf
2014-05-22 15:52 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 04/20] cloop: " Kevin Wolf
2014-05-22 15:53 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 05/20] curl: " Kevin Wolf
2014-05-22 15:54 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 06/20] dmg: " Kevin Wolf
2014-05-22 15:55 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 07/20] iscsi: " Kevin Wolf
2014-05-21 20:26 ` Paolo Bonzini
2014-05-22 15:58 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 08/20] nfs: " Kevin Wolf
2014-05-22 16:00 ` Stefan Hajnoczi
2014-05-22 16:38 ` ronnie sahlberg
2014-05-21 16:28 ` [Qemu-devel] [PATCH 09/20] parallels: " Kevin Wolf
2014-05-22 16:01 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 10/20] qcow1: " Kevin Wolf
2014-05-22 16:01 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 11/20] qcow2: " Kevin Wolf
2014-05-22 16:07 ` Stefan Hajnoczi
2014-05-21 16:28 ` Kevin Wolf [this message]
2014-05-22 16:08 ` [Qemu-devel] [PATCH 12/20] qed: " Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 13/20] raw-posix: " Kevin Wolf
2014-05-22 16:08 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 14/20] raw-win32: " Kevin Wolf
2014-05-22 16:09 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 15/20] rbd: " Kevin Wolf
2014-05-22 16:10 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 16/20] vdi: " Kevin Wolf
2014-05-22 16:10 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 17/20] vhdx: " Kevin Wolf
2014-05-22 16:11 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 18/20] vmdk: " Kevin Wolf
2014-05-22 16:11 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 19/20] vpc: " Kevin Wolf
2014-05-22 16:11 ` Stefan Hajnoczi
2014-05-21 16:28 ` [Qemu-devel] [PATCH 20/20] mirror: " Kevin Wolf
2014-05-22 16:11 ` Stefan Hajnoczi
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