This patch makes it work for me again.
Although I still get this warning, fyi:
> WARNING: Image format was not specified for
> 'rbd:test/vm-119-disk-1:mon_host=10.10.10.1;10.10.10.2;10.10.10.3:id=admin:auth_supported=cephx:keyring=/etc/pve/priv/ceph/ceph_store.keyring'
> and probing guessed raw.
> Automatically detecting the format is dangerous for raw
> images, write operations on block 0 will be restricted.
> Specify the 'raw' format explicitly to remove the restrictions.
On 02/23/2016 04:16 PM, Wolfgang Bumiller wrote:
> ---
> This should fix the problem reported in forum thread 26108.
> (`Unknown driver 'keyring'`)
>
> See the patch commit message below for details.
>
> ...-vma-better-driver-guessing-for-bdrv_open.patch | 40
> ++++++++++++++++++++++
> debian/patches/series | 1 +
> 2 files changed, 41 insertions(+)
> create mode 100644
> debian/patches/pve/0043-vma-better-driver-guessing-for-bdrv_open.patch
Tested-by: Thomas Lamprecht <t.lampre...@proxmox.com>
>
> diff --git
> a/debian/patches/pve/0043-vma-better-driver-guessing-for-bdrv_open.patch
> b/debian/patches/pve/0043-vma-better-driver-guessing-for-bdrv_open.patch
> new file mode 100644
> index 0000000..73e7ad3
> --- /dev/null
> +++ b/debian/patches/pve/0043-vma-better-driver-guessing-for-bdrv_open.patch
> @@ -0,0 +1,40 @@
> +From dfcf4c6da567aedfc0ebebf95f1d069187a9e8ed Mon Sep 17 00:00:00 2001
> +From: Wolfgang Bumiller <w.bumil...@proxmox.com>
> +Date: Tue, 23 Feb 2016 15:48:41 +0100
> +Subject: [PATCH] vma: better driver guessing for bdrv_open
> +
> +Only use 'raw' when the file actually ends with .raw and
> +no protocol has been specified similar to how it happens
> +in bdrv_fill_options() called by bdrv_options().
> +Other formats are recognized fine by filename (including
> +qcow2 and "rbd:..." strings).
> +---
> + vma.c | 12 ++++++++----
> + 1 file changed, 8 insertions(+), 4 deletions(-)
> +
> +diff --git a/vma.c b/vma.c
> +index cc48013..1db9bc7 100644
> +--- a/vma.c
> ++++ b/vma.c
> +@@ -301,10 +301,14 @@ static int extract_content(int argc, char **argv)
> +
> + BlockDriverState *bs = bdrv_new();
> +
> +- const char *tmp = g_strrstr(devfn, ".");
> +- const char *format = (tmp == NULL) ? "raw" : ++tmp;
> +- QDict *options = qdict_new();
> +- qdict_put(options, "driver", qstring_from_str(format));
> ++ size_t devlen = strlen(devfn);
> ++ QDict *options = NULL;
> ++ if (devlen > 4 && strcmp(devfn+devlen-4, ".raw") == 0 &&
> ++ !path_has_protocol(devfn))
> ++ {
> ++ options = qdict_new();
> ++ qdict_put(options, "driver", qstring_from_str("raw"));
> ++ }
> +
> + if (errp || bdrv_open(&bs, devfn, NULL, options, flags, &errp)) {
> + g_error("can't open file %s - %s", devfn,
> +--
> +2.1.4
> +
> diff --git a/debian/patches/series b/debian/patches/series
> index 8a61d6b..379f0d1 100644
> --- a/debian/patches/series
> +++ b/debian/patches/series
> @@ -40,6 +40,7 @@ pve/0039-qapi-qmp_mashal_-renames-for-get_link_status.patch
> pve/0040-vnc-make-x509-imply-tls-again.patch
> pve/0041-PVE-VNC-authentication.patch
> pve/0042-vma-writer-don-t-bail-out-on-zero-length-files.patch
> +pve/0043-vma-better-driver-guessing-for-bdrv_open.patch
> extra/CVE-2015-8558-ehci_make_idt_processing_more_robust.patch
> extra/CVE-2015-8613-scsi-initialize-info-object.patch
> extra/CVE-2015-8701-net-rocker-off-by-one.patch
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