[src/trunk]: src/sys/rump/librump/rumpvfs adjust inode size too if VOP_SETATT...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/970860b4da09
branches:  trunk
changeset: 761610:970860b4da09
user:      pooka <pooka%NetBSD.org@localhost>
date:      Wed Feb 02 14:41:55 2011 +0000

description:
adjust inode size too if VOP_SETATTR changes size

diffstat:

 sys/rump/librump/rumpvfs/rumpfs.c |  24 ++++++++++++++++++++----
 1 files changed, 20 insertions(+), 4 deletions(-)

diffs (45 lines):

diff -r e133975adc07 -r 970860b4da09 sys/rump/librump/rumpvfs/rumpfs.c
--- a/sys/rump/librump/rumpvfs/rumpfs.c Wed Feb 02 12:26:42 2011 +0000
+++ b/sys/rump/librump/rumpvfs/rumpfs.c Wed Feb 02 14:41:55 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rumpfs.c,v 1.89 2011/01/14 11:07:42 pooka Exp $        */
+/*     $NetBSD: rumpfs.c,v 1.90 2011/02/02 14:41:55 pooka Exp $        */
 
 /*
  * Copyright (c) 2009, 2010 Antti Kantee.  All Rights Reserved.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rumpfs.c,v 1.89 2011/01/14 11:07:42 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rumpfs.c,v 1.90 2011/02/02 14:41:55 pooka Exp $");
 
 #include <sys/param.h>
 #include <sys/atomic.h>
@@ -855,8 +855,24 @@
        SETIFVAL(va_flags, u_long);
 #undef  SETIFVAL
 
-       if (vp->v_type == VREG && vap->va_size != VSIZENOTSET)
-               uvm_vnp_setsize(vp, vap->va_size);
+       if (vp->v_type == VREG &&
+           vap->va_size != VSIZENOTSET &&
+           vap->va_size != rn->rn_dlen) {
+               void *newdata;
+               size_t copylen, newlen;
+
+               newlen = vap->va_size;
+               newdata = rump_hypermalloc(newlen, 0, true, "rumpfs");
+
+               copylen = MIN(rn->rn_dlen, newlen);
+               memset(newdata, 0, newlen);
+               memcpy(newdata, rn->rn_data, copylen);
+               rump_hyperfree(rn->rn_data, rn->rn_dlen); 
+
+               rn->rn_data = newdata;
+               rn->rn_dlen = newlen;
+               uvm_vnp_setsize(vp, newlen);
+       }
        return 0;
 }