Module Name: src
Committed By: martin
Date: Tue Mar 15 10:00:14 UTC 2022
Modified Files:
src/usr.sbin/puffs/mount_9p [netbsd-8]: node.c
Log Message:
Pull up following revision(s) (requested by ozaki-r in ticket #1738):
usr.sbin/puffs/mount_9p/node.c: revision 1.30
usr.sbin/puffs/mount_9p/node.c: revision 1.31
mount_9p: fix writing to a file opened with write-only mode
With the page cache, writing data to a file may demand to read contents
from a storage to fill a page in the page cache first.
Opening a file with write-only mode by a user lets a mount_9p process
open a file with write-only mode too at a 9p server. Thus, a read
request to the file from the page cache fails.
So we need to open a file always with read mode (internally) even if it
is opened with write-only mode by a user.
Note that the change doesn't mean that mount_9p allows users to read
contents from a file that is opened with write-only mode.
-
mount_9p: check returned type for Tread
To generate a diff of this commit:
cvs rdiff -u -r1.21 -r1.21.40.1 src/usr.sbin/puffs/mount_9p/node.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/usr.sbin/puffs/mount_9p/node.c
diff -u src/usr.sbin/puffs/mount_9p/node.c:1.21 src/usr.sbin/puffs/mount_9p/node.c:1.21.40.1
--- src/usr.sbin/puffs/mount_9p/node.c:1.21 Sun Jan 18 10:10:47 2009
+++ src/usr.sbin/puffs/mount_9p/node.c Tue Mar 15 10:00:14 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: node.c,v 1.21 2009/01/18 10:10:47 lukem Exp $ */
+/* $NetBSD: node.c,v 1.21.40.1 2022/03/15 10:00:14 martin Exp $ */
/*
* Copyright (c) 2007 Antti Kantee. All Rights Reserved.
@@ -27,7 +27,7 @@
#include <sys/cdefs.h>
#ifndef lint
-__RCSID("$NetBSD: node.c,v 1.21 2009/01/18 10:10:47 lukem Exp $");
+__RCSID("$NetBSD: node.c,v 1.21.40.1 2022/03/15 10:00:14 martin Exp $");
#endif /* !lint */
#include <assert.h>
@@ -181,6 +181,11 @@ puffs9p_node_readdir(struct puffs_usermo
p9pbuf_put_4(pb, *reslen); /* XXX */
GETRESPONSE(pb);
+ if (p9pbuf_get_type(pb) != P9PROTO_R_READ) {
+ rv = proto_handle_rerror(pu, pb);
+ goto out;
+ }
+
p9pbuf_get_4(pb, &count);
/*
@@ -266,6 +271,8 @@ puffs9p_node_open(struct puffs_usermount
puffs_setback(pcc, PUFFS_SETBACK_INACT_N1);
if (pn->pn_va.va_type != VDIR) {
+ /* Always require read access for page cache */
+ mode |= FREAD;
if (mode & FREAD && p9n->fid_read == P9P_INVALFID) {
nfid = NEXTFID(p9p);
error = proto_cc_open(pu, p9n->fid_base, nfid,
