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From: Dmitry Fomichev <dmitry.fomichev@wdc.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	Kevin Wolf <kwolf@redhat.com>, Max Reitz <mreitz@redhat.com>,
	"Michael S . Tsirkin" <mst@redhat.com>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	John Snow <jsnow@redhat.com>
Cc: Dmitry Fomichev <dmitry.fomichev@wdc.com>,
	Alistair Francis <alistair.francis@wdc.com>,
	qemu-devel@nongnu.org, qemu-block@nongnu.org
Subject: [Qemu-devel] [PATCH v4 4/4] raw: Don't open ZBDs if backend can't handle them
Date: Fri, 23 Aug 2019 15:22:26 -0400
Message-ID: <20190823192226.21154-5-dmitry.fomichev@wdc.com> (raw)
In-Reply-To: <20190823192226.21154-1-dmitry.fomichev@wdc.com>

Abort opening a zoned device as a raw file in case the chosen
block backend driver lacks proper support for this type of
storage.

Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
---
 block/file-posix.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/block/file-posix.c b/block/file-posix.c
index d9f2fc5e46..090e7c4d2f 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2884,6 +2884,20 @@ static int raw_check_perm(BlockDriverState *bs, uint64_t perm, uint64_t shared,
             goto fail;
         }
     }
+
+    /*
+     * If we are opening a zoned block device, check if the backend
+     * driver can properly handle such devices, abort if not.
+     */
+    if (bdrv_is_zoned(bs) &&
+        (shared & BLK_PERM_SUPPORT_ZONED) &&
+        !(perm & BLK_PERM_SUPPORT_ZONED)) {
+        error_setg(errp,
+                   "block backend driver doesn't support HM zoned devices");
+        ret = -ENOTSUP;
+        goto fail;
+    }
+
     return 0;
 
 fail:
-- 
2.21.0



  parent reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-23 19:22 [Qemu-devel] [PATCH v4 0/4] virtio/block: handle zoned backing devices Dmitry Fomichev
2019-08-23 19:22 ` [Qemu-devel] [PATCH v4 1/4] block: Add zoned device model property Dmitry Fomichev
2019-08-23 19:22 ` [Qemu-devel] [PATCH v4 2/4] raw: Recognize zoned backing devices Dmitry Fomichev
2019-08-23 19:22 ` [Qemu-devel] [PATCH v4 3/4] block/ide/scsi: Set BLK_PERM_SUPPORT_ZONED Dmitry Fomichev
2019-08-23 19:22 ` Dmitry Fomichev [this message]
2019-08-23 19:52 ` [Qemu-devel] [PATCH v4 0/4] virtio/block: handle zoned backing devices no-reply

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