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nfs: Handle failure for potentially large allocations

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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 nfs block driver.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
This commit is contained in:
Kevin Wolf
2014-08-15 15:07:15 +02:00
parent 4d5a3f888c
commit 2347dd7b68
1 changed files with 5 additions and 1 deletions
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block/nfs.c
+5 -1
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@@ -172,7 +172,11 @@ static int coroutine_fn nfs_co_writev(BlockDriverState *bs,
nfs_co_init_task(client, &task);
buf = g_malloc(nb_sectors * BDRV_SECTOR_SIZE);
buf = g_try_malloc(nb_sectors * BDRV_SECTOR_SIZE);
if (nb_sectors && buf == NULL) {
return -ENOMEM;
}
qemu_iovec_to_buf(iov, 0, buf, nb_sectors * BDRV_SECTOR_SIZE);
if (nfs_pwrite_async(client->context, client->fh,