[src/trunk]: src/sys/fs/tmpfs Make tmpfs write fail when process file size li...

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

details:   https://anonhg.NetBSD.org/src/rev/fbeba45c0482
branches:  trunk
changeset: 748227:fbeba45c0482
user:      njoly <njoly%NetBSD.org@localhost>
date:      Sat Oct 17 22:20:56 2009 +0000

description:
Make tmpfs write fail when process file size limit is reached.

diffstat:

 sys/fs/tmpfs/tmpfs_vnops.c |  14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)

diffs (42 lines):

diff -r a8804df77755 -r fbeba45c0482 sys/fs/tmpfs/tmpfs_vnops.c
--- a/sys/fs/tmpfs/tmpfs_vnops.c        Sat Oct 17 21:36:02 2009 +0000
+++ b/sys/fs/tmpfs/tmpfs_vnops.c        Sat Oct 17 22:20:56 2009 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tmpfs_vnops.c,v 1.63 2009/10/06 00:17:24 rmind Exp $   */
+/*     $NetBSD: tmpfs_vnops.c,v 1.64 2009/10/17 22:20:56 njoly Exp $   */
 
 /*
  * Copyright (c) 2005, 2006, 2007 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tmpfs_vnops.c,v 1.63 2009/10/06 00:17:24 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tmpfs_vnops.c,v 1.64 2009/10/17 22:20:56 njoly Exp $");
 
 #include <sys/param.h>
 #include <sys/dirent.h>
@@ -594,6 +594,7 @@
        bool extended;
        int error;
        off_t oldsize;
+       struct proc *p = curproc;
        struct tmpfs_node *node;
        struct uvm_object *uobj;
 
@@ -612,6 +613,15 @@
                goto out;
        }
 
+       if (((uio->uio_offset + uio->uio_resid) >
+           p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) {
+               mutex_enter(proc_lock);
+               psignal(p, SIGXFSZ);
+               mutex_exit(proc_lock);
+               error = EFBIG;
+               goto out;
+       }
+
        if (ioflag & IO_APPEND)
                uio->uio_offset = node->tn_size;