From 8214b94c8fd3fdbe50299b2c18766cc2c46546d8 Mon Sep 17 00:00:00 2001
From: Alessandro Rubini <rubini@gnudd.com>
Date: Wed, 23 Nov 2011 18:29:52 +0100
Subject: [PATCH] zio-dump: check ZIO version
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>
---
zio-dump.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/zio-dump.c b/zio-dump.c
index 2964421..317a8c3 100644
--- a/zio-dump.c
+++ b/zio-dump.c
@@ -20,6 +20,7 @@ char *prgname;
void read_channel(int cfd, int dfd, FILE *log)
{
+ int err = 0;
struct zio_control ctrl;
int i, j;
@@ -41,6 +42,26 @@ void read_channel(int cfd, int dfd, FILE *log)
break; /* ok */
}
+ /* Fail badly if the version is not the right one */
+ if (ctrl.major_version != ZIO_MAJOR_VERSION)
+ err++;
+ if (ZIO_MAJOR_VERSION == 0 && ctrl.minor_version != ZIO_MINOR_VERSION)
+ err++;
+ if (err) {
+ fprintf(stderr, "%s: kernel has zio %i.%i, "
+ "but I'm compiled for %i.%i\n", prgname,
+ ctrl.major_version, ctrl.minor_version,
+ ZIO_MAJOR_VERSION, ZIO_MINOR_VERSION);
+ exit(1);
+ }
+ if (ctrl.minor_version != ZIO_MINOR_VERSION) {
+ static int warned;
+
+ if (!warned++)
+ fprintf(stderr, "%s: warning: minor version mismatch\n",
+ prgname);
+ }
+
printf("Ctrl: version %i.%i, trigger %.16s, dev %.16s, "
"cset %i, chan %i\n",
ctrl.major_version, ctrl.minor_version,
--
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