From 5f42652415968654b7046ee4549614afc008f16f Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Tue, 25 Jun 2002 05:06:40 +0000
Subject: 2002-06-14 Roland McGrath <roland@frob.com>
* proxy-defpager.c: New file.
* Makefile (targets, SRCS): Add it.
(proxy-defpager): New target.
(OBJS): Add default_pagerServer.o here.
---
trans/Makefile | 10 +-
trans/proxy-defpager.c | 255 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 261 insertions(+), 4 deletions(-)
create mode 100644 trans/proxy-defpager.c
(limited to 'trans')
diff --git a/trans/Makefile b/trans/Makefile
index 13fb0856..1fc07a3a 100644
--- a/trans/Makefile
+++ b/trans/Makefile
@@ -19,12 +19,13 @@ dir := trans
makemode := servers
targets = symlink firmlink ifsock magic null fifo new-fifo fwd crash \
- password hello hello-mt streamio fakeroot
+ password hello hello-mt streamio fakeroot proxy-defpager
SRCS = ifsock.c symlink.c magic.c null.c fifo.c new-fifo.c fwd.c \
- crash.c firmlink.c password.c hello.c hello-mt.c streamio.c fakeroot.c
+ crash.c firmlink.c password.c hello.c hello-mt.c streamio.c \
+ fakeroot.c proxy-defpager.c
OBJS = $(SRCS:.c=.o) fsysServer.o ifsockServer.o passwordServer.o \
crashServer.o crash_replyUser.o msgServer.o \
- device_replyServer.o elfcore.o
+ default_pagerServer.o device_replyServer.o elfcore.o
HURDLIBS = threads ports trivfs fshelp pipe ihash shouldbeinlibc
password-LDLIBS = $(LIBCRYPT)
@@ -37,8 +38,9 @@ ifsock: ifsockServer.o
crash: crashServer.o crash_replyUser.o msgServer.o elfcore.o
password: passwordServer.o
streamio: device_replyServer.o
+proxy-defpager: default_pagerServer.o
-crash password streamio: ../libthreads/libthreads.a ../libports/libports.a ../libtrivfs/libtrivfs.a ../libthreads/libthreads.a ../libfshelp/libfshelp.a
+proxy-defpager crash password streamio: ../libthreads/libthreads.a ../libports/libports.a ../libtrivfs/libtrivfs.a ../libthreads/libthreads.a ../libfshelp/libfshelp.a
fifo new-fifo: ../libpipe/libpipe.a
fwd: ../libfshelp/libfshelp.a ../libports/libports.a
hello-mt magic null ifsock fifo new-fifo firmlink: ../libtrivfs/libtrivfs.a ../libfshelp/libfshelp.a ../libthreads/libthreads.a ../libports/libports.a ../libihash/libihash.a
diff --git a/trans/proxy-defpager.c b/trans/proxy-defpager.c
new file mode 100644
index 00000000..d4c8d753
--- /dev/null
+++ b/trans/proxy-defpager.c
@@ -0,0 +1,255 @@
+/* A translator for providing access to Mach default_pager.defs control calls
+
+ Copyright (C) 2002 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <hurd/trivfs.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <argp.h>
+#include <error.h>
+#include <version.h>
+#include <hurd/paths.h>
+
+#include "default_pager_S.h"
+
+static mach_port_t real_defpager, dev_master;
+
+static error_t
+allowed (mach_port_t port, int mode)
+{
+ struct trivfs_protid *cred = ports_lookup_port
+ (0, port, trivfs_protid_portclasses[0]);
+ if (port == 0)
+ return MIG_BAD_ID;
+ error_t result = (cred->po->openmodes & mode) ? 0 : EACCES;
+ ports_port_deref (cred);
+ return result;
+}
+
+kern_return_t
+default_pager_object_create (mach_port_t default_pager,
+ memory_object_t *memory_object,
+ vm_size_t object_size)
+{
+ return allowed (default_pager, O_EXEC)
+ ?: default_pager_object_create (real_defpager, memory_object, object_size);
+}
+
+kern_return_t
+default_pager_info (mach_port_t default_pager, default_pager_info_t *info)
+{
+ return allowed (default_pager, O_READ)
+ ?: default_pager_info (default_pager, info);
+}
+
+kern_return_t
+default_pager_objects (mach_port_t default_pager,
+ default_pager_object_array_t *objects,
+ mach_msg_type_number_t *objectsCnt,
+ mach_port_array_t *ports,
+ mach_msg_type_number_t *portsCnt)
+{
+ return allowed (default_pager, O_WRITE)
+ ?: default_pager_objects (real_defpager,
+ objects, objectsCnt, ports, portsCnt);
+}
+
+kern_return_t
+default_pager_paging_file (mach_port_t default_pager,
+ mach_port_t master_device_port,
+ default_pager_filename_t filename,
+ boolean_t add)
+{
+ return allowed (default_pager, O_WRITE)
+ ?: default_pager_paging_file (real_defpager, dev_master, filename, add)
+ ?: mach_port_deallocate (mach_task_self (), master_device_port);
+}
+
+kern_return_t
+default_pager_paging_storage (mach_port_t default_pager,
+ mach_port_t device,
+ recnum_t *runs, mach_msg_type_number_t nruns,
+ default_pager_filename_t name,
+ boolean_t add)
+{
+ return allowed (default_pager, O_WRITE)
+ ?: default_pager_paging_storage (real_defpager, dev_master,
+ runs, nruns, name, add)
+ ?: mach_port_deallocate (mach_task_self (), device);
+}
+
+kern_return_t
+default_pager_object_set_size (mach_port_t memory_object,
+ mach_port_t reply_port,
+ mach_port_seqno_t seqno,
+ vm_size_t object_size_limit)
+{
+ /* This is sent to an object, not the control port. */
+ return MIG_BAD_ID;
+}
+
+
+/* Trivfs hooks */
+
+int trivfs_fstype = FSTYPE_MISC;
+int trivfs_fsid;
+
+int trivfs_support_read = 1;
+int trivfs_support_write = 1;
+int trivfs_support_exec = 1;
+
+int trivfs_allow_open = O_READ | O_WRITE | O_EXEC;
+
+void
+trivfs_modify_stat (struct trivfs_protid *cred, struct stat *st)
+{
+ st->st_blksize = vm_page_size * 256; /* Make transfers LARRRRRGE */
+
+ st->st_size = 0;
+ st->st_blocks = 0;
+
+ st->st_mode &= ~S_IFMT;
+ st->st_mode |= S_IFCHR;
+}
+
+
+error_t
+trivfs_goaway (struct trivfs_control *fsys, int flags)
+{
+ exit (0);
+}
+
+kern_return_t
+trivfs_S_io_read (struct trivfs_protid *cred,
+ mach_port_t reply, mach_msg_type_name_t replytype,
+ char **data,
+ mach_msg_type_number_t *datalen,
+ loff_t offs,
+ mach_msg_type_number_t amt)
+{
+ if (!cred)
+ return EOPNOTSUPP;
+ return EIO;
+}
+
+kern_return_t
+trivfs_S_io_write (struct trivfs_protid *cred,
+ mach_port_t reply, mach_msg_type_name_t replytype,
+ char *data, mach_msg_type_number_t datalen,
+ loff_t offs, mach_msg_type_number_t *amt)
+{
+ if (!cred)
+ return EOPNOTSUPP;
+ return EIO;
+}
+
+kern_return_t
+trivfs_S_io_get_openmodes (struct trivfs_protid *cred,
+ mach_port_t reply, mach_msg_type_name_t replytype,
+ int *bits)
+{
+ if (!cred)
+ return EOPNOTSUPP;
+ else
+ {
+ *bits = cred->po->openmodes;
+ return 0;
+ }
+}
+
+error_t
+trivfs_S_io_set_all_openmodes (struct trivfs_protid *cred,
+ mach_port_t reply,
+ mach_msg_type_name_t replytype,
+ int mode)
+{
+ if (!cred)
+ return EOPNOTSUPP;
+ else
+ return 0;
+}
+
+kern_return_t
+trivfs_S_io_set_some_openmodes (struct trivfs_protid *cred,
+ mach_port_t reply,
+ mach_msg_type_name_t replytype,
+ int bits)
+{
+ if (!cred)
+ return EOPNOTSUPP;
+ else
+ return 0;
+}
+
+kern_return_t
+trivfs_S_io_clear_some_openmodes (struct trivfs_protid *cred,
+ mach_port_t reply,
+ mach_msg_type_name_t replytype,
+ int bits)
+{
+ if (!cred)
+ return EOPNOTSUPP;
+ else
+ return 0;
+}
+
+const char *argp_program_version = STANDARD_HURD_VERSION (proxy-defpager);
+
+static const struct argp argp =
+{doc: "\
+Access to control interfaces of Mach default pager.\n\
+This translator should normally be set on " _SERVERS_DEFPAGER "."};
+
+int
+main (int argc, char **argv)
+{
+ error_t err;
+ mach_port_t bootstrap;
+ struct trivfs_control *fsys;
+ mach_port_t host_priv;
+
+ argp_parse (&argp, argc, argv, 0, 0, 0);
+
+ err = get_privileged_ports (&host_priv, &dev_master);
+ if (err)
+ error (2, err, "cannot get privileged ports");
+ real_defpager = MACH_PORT_NULL;
+ err = vm_set_default_memory_manager (host_priv, &real_defpager);
+ mach_port_deallocate (mach_task_self (), host_priv);
+ if (err)
+ error (3, err, "vm_set_default_memory_manager");
+ if (real_defpager == MACH_PORT_NULL)
+ error (1, 0, "no default memory manager set!");
+
+ task_get_bootstrap_port (mach_task_self (), &bootstrap);
+ if (bootstrap == MACH_PORT_NULL)
+ error (1, 0, "Must be started as a translator");
+
+ trivfs_fsid = getpid ();
+
+ /* Reply to our parent. */
+ err = trivfs_startup (bootstrap, 0, 0, 0, 0, 0, &fsys);
+ mach_port_deallocate (mach_task_self (), bootstrap);
+ if (err)
+ error (4, err, "Contacting parent");
+
+ /* Launch. */
+ ports_manage_port_operations_multithread (fsys->pi.bucket, trivfs_demuxer,
+ 2 * 60 * 1000, 0, 0);
+
+ return 0;
+}
--
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