On 05/24/11 11:10, Kevin Wolf wrote:
Am 24.05.2011 10:36, schrieb Christoph Egger:
On 05/23/11 16:11, Kevin Wolf wrote:
Am 23.05.2011 14:34, schrieb Christoph Egger:
if given a block device, use the character device instead.
From: Manuel Bouyer<bou...@netbsd.org>
Signed-off-by: Christoph Egger<christoph.eg...@amd.com>
A useful commit message would explain why you're doing that.
How about this:
On NetBSD, the PV backend has to use the block device; but a
userland process is better with the character device interface. In
addition, a block device can't be opened twice; if the backend opens
it qemu can't and vice-versa.
Hm, what PV backend? Are you talking about Xen? If so, let's make this
clear:
Yes, it is about Xen.
On NetBSD a userland process is better with the character device
interface. In addition, a block device can't be opened twice; if a Xen
backend opens it, qemu can't and vice-versa.
diff --git a/block/raw-posix.c b/block/raw-posix.c
index 6b72470..d05f373 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -136,11 +143,45 @@ static int64_t raw_getlength(BlockDriverState *bs);
static int cdrom_reopen(BlockDriverState *bs);
#endif
+#if defined(__NetBSD__)
+static const char *raw_get_rawdevice(const char *filename)
+{
+ static char namebuf[PATH_MAX];
+ const char *dp = strrchr(filename, '/');
+
+ if (dp == NULL) {
+ snprintf(namebuf, PATH_MAX, "r%s", filename);
+ } else {
+ snprintf(namebuf, PATH_MAX, "%.*s/r%s",
+ (int)(dp - filename), filename, dp + 1);
+ }
+ fprintf(stderr, "%s is a block device", filename);
+ filename = namebuf;
+ fprintf(stderr, ", using %s\n", filename);
Not sure if fprintf is a good idea here, but ok.
I want to make it clear what file the qemu process has been
using. this is what log files are for, isn't it ?
Yeah, while I don't like fprintfs in block driver code, I do agree that
it makes some sense here.
Kevin
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