Fix a bug where dump miscalculates the tape size based on -d/-s

[dump.git] / dump / tape.c

diff --git a/dump/tape.c b/dump/tape.c
index d615960b1dc05b3cedfde591d9ed50002e041dca..89f630d278ea3484c4ac8aa8054575a81bcdc7a6 100644 (file)
--- a/dump/tape.c
+++ b/dump/tape.c
@@ -37,7 +37,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-       "$Id: tape.c,v 1.85 2004/07/01 09:14:49 stelian Exp $";
+       "$Id: tape.c,v 1.88 2005/03/02 08:46:55 stelian Exp $";
 #endif /* not lint */
 
 #include <config.h>
@@ -60,7 +60,11 @@ int    write(), read();
 #ifdef __linux__
 #include <sys/types.h>
 #include <sys/time.h>
-#include <linux/fs.h>  /* for definition of BLKFLSBUF */
+#include <sys/ioctl.h>
+#include <sys/mount.h> /* for definition of BLKFLSBUF */
+#ifndef BLKFLSBUF      /* last resort... */
+#define BLKFLSBUF _IO(0x12, 97) /* Flush buffer cache.  */
+#endif
 #include <time.h>
 #endif
 #include <sys/param.h>
@@ -416,6 +420,10 @@ flushtape(void)
 
        int siz = (char *)nextblock - (char *)slp->req;
 
+       /* make sure returned has sane values in case we don't read 
+        * them from the slave in this pass */
+       returned.unclen = returned.clen = writesize;
+
        slp->req[trecno].count = 0;                     /* Sentinel */
 
        if (dump_atomic_write( slp->fd, (char *)slp->req, siz) != siz)
@@ -471,10 +479,14 @@ flushtape(void)
        }
 
        blks = 0;
-       if (spcl.c_type != TS_END) {
-               for (i = 0; i < spcl.c_count; i++)
-                       if (spcl.c_addr[i] != 0)
-                               blks++;
+       if (spcl.c_type == TS_CLRI || spcl.c_type == TS_BITS)
+               blks = spcl.c_count;
+       else {
+               if (spcl.c_type != TS_END) {
+                       for (i = 0; i < spcl.c_count; i++)
+                               if (spcl.c_addr[i] != 0)
+                                       blks++;
+               }
        }
        slp->count = lastspclrec + blks + 1 - spcl.c_tapea;
        slp->tapea = spcl.c_tapea;
@@ -612,6 +624,10 @@ rollforward(void)
        tslp = &slaves[SLAVES];
        ntb = (union u_spcl *)tslp->tblock[1];
 
+       /* make sure returned has sane values in case we don't read 
+        * them from the slave in this pass */
+       returned.unclen = returned.clen = writesize;
+
        /*
         * Each of the N slaves should have requests that need to
         * be replayed on the next tape.  Use the extra slave buffers