Author: kib
Date: Mon Aug 27 20:25:26 2012
New Revision: 239755
URL: http://svn.freebsd.org/changeset/base/239755
Log:
MFC r239588:
Provide some compat32 shims for sysctl vfs.conflist. It is required
for getvfsbyname(3) operation when called from 32bit process, and
getvfsbyname(3) is used by recent bsdtar import.
Modified:
stable/9/sys/kern/vfs_subr.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/kern/vfs_subr.c
==============================================================================
--- stable/9/sys/kern/vfs_subr.c Mon Aug 27 20:23:03 2012
(r239754)
+++ stable/9/sys/kern/vfs_subr.c Mon Aug 27 20:25:26 2012
(r239755)
@@ -41,6 +41,7 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
+#include "opt_compat.h"
#include "opt_ddb.h"
#include "opt_watchdog.h"
@@ -3110,22 +3111,50 @@ DB_SHOW_COMMAND(mount, db_show_mount)
/*
* Fill in a struct xvfsconf based on a struct vfsconf.
*/
-static void
-vfsconf2x(struct vfsconf *vfsp, struct xvfsconf *xvfsp)
+static int
+vfsconf2x(struct sysctl_req *req, struct vfsconf *vfsp)
{
+ struct xvfsconf xvfsp;
- strcpy(xvfsp->vfc_name, vfsp->vfc_name);
- xvfsp->vfc_typenum = vfsp->vfc_typenum;
- xvfsp->vfc_refcount = vfsp->vfc_refcount;
- xvfsp->vfc_flags = vfsp->vfc_flags;
+ bzero(&xvfsp, sizeof(xvfsp));
+ strcpy(xvfsp.vfc_name, vfsp->vfc_name);
+ xvfsp.vfc_typenum = vfsp->vfc_typenum;
+ xvfsp.vfc_refcount = vfsp->vfc_refcount;
+ xvfsp.vfc_flags = vfsp->vfc_flags;
/*
* These are unused in userland, we keep them
* to not break binary compatibility.
*/
- xvfsp->vfc_vfsops = NULL;
- xvfsp->vfc_next = NULL;
+ xvfsp.vfc_vfsops = NULL;
+ xvfsp.vfc_next = NULL;
+ return (SYSCTL_OUT(req, &xvfsp, sizeof(xvfsp)));
}
+#ifdef COMPAT_FREEBSD32
+struct xvfsconf32 {
+ uint32_t vfc_vfsops;
+ char vfc_name[MFSNAMELEN];
+ int32_t vfc_typenum;
+ int32_t vfc_refcount;
+ int32_t vfc_flags;
+ uint32_t vfc_next;
+};
+
+static int
+vfsconf2x32(struct sysctl_req *req, struct vfsconf *vfsp)
+{
+ struct xvfsconf32 xvfsp;
+
+ strcpy(xvfsp.vfc_name, vfsp->vfc_name);
+ xvfsp.vfc_typenum = vfsp->vfc_typenum;
+ xvfsp.vfc_refcount = vfsp->vfc_refcount;
+ xvfsp.vfc_flags = vfsp->vfc_flags;
+ xvfsp.vfc_vfsops = 0;
+ xvfsp.vfc_next = 0;
+ return (SYSCTL_OUT(req, &xvfsp, sizeof(xvfsp)));
+}
+#endif
+
/*
* Top level filesystem related information gathering.
*/
@@ -3133,14 +3162,16 @@ static int
sysctl_vfs_conflist(SYSCTL_HANDLER_ARGS)
{
struct vfsconf *vfsp;
- struct xvfsconf xvfsp;
int error;
error = 0;
TAILQ_FOREACH(vfsp, &vfsconf, vfc_list) {
- bzero(&xvfsp, sizeof(xvfsp));
- vfsconf2x(vfsp, &xvfsp);
- error = SYSCTL_OUT(req, &xvfsp, sizeof xvfsp);
+#ifdef COMPAT_FREEBSD32
+ if (req->flags & SCTL_MASK32)
+ error = vfsconf2x32(req, vfsp);
+ else
+#endif
+ error = vfsconf2x(req, vfsp);
if (error)
break;
}
@@ -3160,7 +3191,6 @@ vfs_sysctl(SYSCTL_HANDLER_ARGS)
int *name = (int *)arg1 - 1; /* XXX */
u_int namelen = arg2 + 1; /* XXX */
struct vfsconf *vfsp;
- struct xvfsconf xvfsp;
printf("WARNING: userland calling deprecated sysctl, "
"please rebuild world\n");
@@ -3184,9 +3214,12 @@ vfs_sysctl(SYSCTL_HANDLER_ARGS)
break;
if (vfsp == NULL)
return (EOPNOTSUPP);
- bzero(&xvfsp, sizeof(xvfsp));
- vfsconf2x(vfsp, &xvfsp);
- return (SYSCTL_OUT(req, &xvfsp, sizeof(xvfsp)));
+#ifdef COMPAT_FREEBSD32
+ if (req->flags & SCTL_MASK32)
+ return (vfsconf2x32(req, vfsp));
+ else
+#endif
+ return (vfsconf2x(req, vfsp));
}
return (EOPNOTSUPP);
}
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