diff options
Diffstat (limited to 'debian/patches/gpg0001-trans-add-identity-translator.patch')
| -rw-r--r-- | debian/patches/gpg0001-trans-add-identity-translator.patch | 941 |
1 files changed, 941 insertions, 0 deletions
diff --git a/debian/patches/gpg0001-trans-add-identity-translator.patch b/debian/patches/gpg0001-trans-add-identity-translator.patch new file mode 100644 index 00000000..6e1b3187 --- /dev/null +++ b/debian/patches/gpg0001-trans-add-identity-translator.patch @@ -0,0 +1,941 @@ +From 7e72e8a337c58e6cb6badff8be4381dc180d8277 Mon Sep 17 00:00:00 2001 +From: Justus Winter <4winter@informatik.uni-hamburg.de> +Date: Sat, 23 Jan 2016 00:14:56 +0100 +Subject: [PATCH hurd 1/4] trans: add identity translator + +The 'identity' translator is the simplest possible translator. It +computes the identity function of Hurdish RPC translations. + +* trans/Makefile: Add new files. +* trans/chroot.c: New file. +* trans/chroot.h: Likewise. +* trans/identity.c: Likewise. +--- + trans/Makefile | 7 +- + trans/chroot.c | 724 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ + trans/chroot.h | 34 +++ + trans/identity.c | 113 +++++++++ + 4 files changed, 875 insertions(+), 3 deletions(-) + create mode 100644 trans/chroot.c + create mode 100644 trans/chroot.h + create mode 100644 trans/identity.c + +diff --git a/trans/Makefile b/trans/Makefile +index 65b51d1..e4eba0a 100644 +--- a/trans/Makefile ++++ b/trans/Makefile +@@ -21,10 +21,10 @@ makemode := servers + + targets = symlink firmlink ifsock magic null fifo new-fifo fwd crash \ + password hello hello-mt streamio fakeroot proxy-defpager remap \ +- mtab ++ mtab identity + 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 proxy-defpager.c remap.c mtab.c ++ fakeroot.c proxy-defpager.c remap.c mtab.c chroot.c identity.c + OBJS = $(SRCS:.c=.o) fsysServer.o ifsockServer.o passwordServer.o \ + crashServer.o crash_replyUser.o msgServer.o \ + default_pagerServer.o default_pagerUser.o \ +@@ -65,7 +65,8 @@ proxy-defpager: default_pagerServer.o default_pagerUser.o + streamio: device_replyServer.o + symlink: fsysServer.o + +-fakeroot: ../libnetfs/libnetfs.a ++identity: chroot.o ++fakeroot identity: ../libnetfs/libnetfs.a + fifo new-fifo: ../libpipe/libpipe.a + crash fifo firmlink hello hello-mt ifsock magic mtab new-fifo null password proxy-defpager remap streamio: ../libtrivfs/libtrivfs.a + $(targets): ../libfshelp/libfshelp.a \ +diff --git a/trans/chroot.c b/trans/chroot.c +new file mode 100644 +index 0000000..0055d6c +--- /dev/null ++++ b/trans/chroot.c +@@ -0,0 +1,724 @@ ++/* chroot.c -- support for writing chrooting translators ++ Copyright (C) 2002, 2003, 2008, 2013, 2016 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ ++ ++#include <argz.h> ++#include <argp.h> ++#include <dirent.h> ++#include <error.h> ++#include <hurd/netfs.h> ++#include <stddef.h> ++#include <stdio.h> ++#include <stdlib.h> ++#include <string.h> ++#include <fcntl.h> ++#include <sys/mman.h> ++#include <sys/stat.h> ++#include <pthread.h> ++#include <hurd/ihash.h> ++#include <hurd/paths.h> ++#include <sys/types.h> ++#include <sys/wait.h> ++#include <unistd.h> ++ ++#include <version.h> ++ ++#include "chroot.h" ++ ++#include "libnetfs/fs_S.h" ++#include "libnetfs/io_S.h" ++#include "libnetfs/fsys_S.h" ++#include "libports/notify_S.h" ++#include "libports/interrupt_S.h" ++ ++/* Make a new virtual node. Always consumes the ports. If ++ successful, NP will be locked. */ ++error_t __attribute__ ((weak)) ++chroot_new_node (file_t file, size_t size, struct node **np) ++{ ++ error_t err; ++ struct netnode *nn; ++ ++ *np = netfs_make_node_alloc (sizeof *nn + size); ++ if (*np == NULL) ++ { ++ mach_port_deallocate (mach_task_self (), file); ++ return ENOMEM; ++ } ++ nn = netfs_node_netnode (*np); ++ nn->file = file; ++ return 0; ++} ++ ++/* Node NP has no more references; free all its associated storage. */ ++void ++netfs_node_norefs (struct node *np) ++{ ++ pthread_mutex_unlock (&np->lock); ++ ++ chroot_node_norefs (np); ++ mach_port_deallocate (mach_task_self (), netfs_node_netnode (np)->file); ++ free (np); ++} ++ ++/* This is the cleanup function we install in netfs_protid_class. If ++ the associated nodes reference count would also drop to zero, and ++ the node has no faked attributes, we destroy it as well. */ ++static void ++chroot_netfs_release_protid (void *cookie) ++{ ++ netfs_release_protid (cookie); ++ ++ int cports = ports_count_class (netfs_control_class); ++ int nports = ports_count_class (netfs_protid_class); ++ ports_enable_class (netfs_control_class); ++ ports_enable_class (netfs_protid_class); ++ if (cports == 0 && nports == 0) ++ { ++ /* The last client is gone. Our job is done. */ ++ error_t err = netfs_shutdown (0); ++ if (! err) ++ exit (EXIT_SUCCESS); ++ ++ /* If netfs_shutdown returns EBUSY, we lost a race against ++ fsys_goaway. Hence we ignore this error. */ ++ if (err != EBUSY) ++ error (1, err, "netfs_shutdown"); ++ } ++} ++ ++error_t __attribute__ ((weak)) ++chroot_init (void) ++{ ++ /* Install our own clean routine. */ ++ netfs_protid_class->clean_routine = chroot_netfs_release_protid; ++ return 0; ++} ++ ++/* This is called by netfs_S_fsys_getroot. */ ++error_t __attribute__ ((weak)) ++netfs_check_open_permissions (struct iouser *user, struct node *np, ++ int flags, int newnode) ++{ ++ return 0; /* XXX */ ++} ++ ++error_t __attribute__ ((weak)) ++netfs_S_dir_lookup (struct protid *diruser, ++ char *filename, ++ int flags, ++ mode_t mode, ++ retry_type *do_retry, ++ char *retry_name, ++ mach_port_t *retry_port, ++ mach_msg_type_name_t *retry_port_type) ++{ ++ struct node *dnp, *np; ++ error_t err; ++ struct protid *newpi; ++ struct iouser *user; ++ file_t file; ++ file_t dir; ++ ++ if (!diruser) ++ return EOPNOTSUPP; ++ ++ dnp = diruser->po->np; ++ ++ //error (0, 0, "dir_lookup (#uids: %d, %s, flags %x, ...)", diruser->user->uids->num, filename, flags); ++ ++ dir = netfs_node_netnode (dnp)->file; ++ err = dir_lookup (dir, filename, flags, mode, do_retry, retry_name, &file); ++ if (err) ++ return err; ++ ++ switch (*do_retry) ++ { ++ case FS_RETRY_NORMAL: ++ break; ++ ++ case FS_RETRY_REAUTH: ++ /* Fallthrough. */ ++ ++ case FS_RETRY_MAGICAL: ++ *retry_port = file; ++ *retry_port_type = MACH_MSG_TYPE_MOVE_SEND; ++ return 0; ++ ++ default: ++ /* Invalid response to our dir_lookup request. */ ++ if (MACH_PORT_VALID (file)) ++ mach_port_deallocate (mach_task_self (), file); ++ *retry_port = MACH_PORT_NULL; ++ *retry_port_type = MACH_MSG_TYPE_COPY_SEND; ++ return EOPNOTSUPP; ++ } ++ ++ /* We have a new port to an underlying node. ++ Find or make our corresponding virtual node. */ ++ ++ np = 0; ++ ++ err = chroot_new_node (file, 0, &np); ++ if (!err) ++ err = netfs_validate_stat (np, diruser->user); ++ if (err) ++ goto lose; ++ ++ assert (*do_retry == FS_RETRY_NORMAL); ++ flags &= ~(O_CREAT|O_EXCL|O_NOLINK|O_NOTRANS|O_NONBLOCK); ++ ++ err = iohelp_dup_iouser (&user, diruser->user); ++ if (!err) ++ { ++ newpi = netfs_make_protid (netfs_make_peropen (np, flags, diruser->po), ++ user); ++ if (! newpi) ++ { ++ iohelp_free_iouser (user); ++ err = errno; ++ } ++ else ++ { ++ *retry_port = ports_get_right (newpi); ++ *retry_port_type = MACH_MSG_TYPE_MAKE_SEND; ++ ports_port_deref (newpi); ++ } ++ } ++ ++ lose: ++ if (dir != netfs_node_netnode (dnp)->file) ++ mach_port_deallocate (mach_task_self (), dir); ++ if (np != NULL) ++ netfs_nput (np); ++ return err; ++} ++ ++/* The user may define this function. Attempt to set the passive ++ translator record for FILE to ARGZ (of length ARGZLEN) for user ++ CRED. */ ++error_t __attribute__ ((weak)) ++netfs_set_translator (struct iouser *cred, struct node *np, ++ char *argz, size_t argzlen) ++{ ++ return file_set_translator (netfs_node_netnode (np)->file, ++ FS_TRANS_EXCL|FS_TRANS_SET, ++ 0, 0, ++ argz, argzlen, ++ MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND); ++} ++ ++/* These callbacks are used only by the standard netfs_S_dir_lookup, ++ which we do not use. But the shared library requires us to define them. */ ++error_t __attribute__ ((weak)) ++netfs_attempt_lookup (struct iouser *user, struct node *dir, ++ char *name, struct node **np) ++{ ++ assert (! "should not be here"); ++ return EIEIO; ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_create_file (struct iouser *user, struct node *dir, ++ char *name, mode_t mode, struct node **np) ++{ ++ assert (! "should not be here"); ++ return EIEIO; ++} ++ ++/* Make sure that NP->nn_stat is filled with the most current information. ++ CRED identifies the user responsible for the operation. NP is locked. */ ++error_t __attribute__ ((weak)) ++netfs_validate_stat (struct node *np, struct iouser *cred) ++{ ++ struct stat st; ++ error_t err = io_stat (netfs_node_netnode (np)->file, &st); ++ if (err) ++ return err; ++ ++ np->nn_stat = st; ++ /* XXX */ ++ np->nn_translated = S_ISLNK (st.st_mode) ? S_IFLNK : 0; ++ ++ return 0; ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_chown (struct iouser *cred, struct node *np, ++ uid_t uid, uid_t gid) ++{ ++ if (! cred) ++ return EOPNOTSUPP; ++ return file_chown (netfs_node_netnode (np)->file, uid, gid); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_chauthor (struct iouser *cred, struct node *np, uid_t author) ++{ ++ if (! cred) ++ return EOPNOTSUPP; ++ return file_chauthor (netfs_node_netnode (np)->file, author); ++} ++ ++/* This should attempt a chmod call for the user specified by CRED on ++ locked node NODE, to change the mode to MODE. Unlike the normal Unix ++ and Hurd meaning of chmod, this function is also used to attempt to ++ change files into other types. If such a transition is attempted which ++ is impossible, then return EOPNOTSUPP. */ ++error_t __attribute__ ((weak)) ++netfs_attempt_chmod (struct iouser *cred, struct node *np, mode_t mode) ++{ ++ if (! cred) ++ return EOPNOTSUPP; ++ return file_chmod (netfs_node_netnode (np)->file, mode); ++} ++ ++/* The user must define this function. Attempt to turn locked node NP ++ (user CRED) into a symlink with target NAME. */ ++error_t __attribute__ ((weak)) ++netfs_attempt_mksymlink (struct iouser *cred, struct node *np, char *name) ++{ ++ int namelen = strlen (name) + 1; ++ char trans[sizeof _HURD_SYMLINK + namelen]; ++ memcpy (trans, _HURD_SYMLINK, sizeof _HURD_SYMLINK); ++ memcpy (&trans[sizeof _HURD_SYMLINK], name, namelen); ++ return file_set_translator (netfs_node_netnode (np)->file, ++ FS_TRANS_EXCL|FS_TRANS_SET, ++ FS_TRANS_EXCL|FS_TRANS_SET, 0, ++ trans, sizeof trans, ++ MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_mkdev (struct iouser *cred, struct node *np, ++ mode_t type, dev_t indexes) ++{ ++ char *trans = 0; ++ int translen = asprintf (&trans, "%s%c%d%c%d", ++ S_ISCHR (type) ? _HURD_CHRDEV : _HURD_BLKDEV, ++ '\0', major (indexes), '\0', minor (indexes)); ++ if (trans == 0) ++ return ENOMEM; ++ else ++ { ++ error_t err = file_set_translator (netfs_node_netnode (np)->file, ++ FS_TRANS_EXCL|FS_TRANS_SET, ++ FS_TRANS_EXCL|FS_TRANS_SET, 0, ++ trans, translen + 1, ++ MACH_PORT_NULL, ++ MACH_MSG_TYPE_COPY_SEND); ++ free (trans); ++ return err; ++ } ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_chflags (struct iouser *cred, struct node *np, int flags) ++{ ++ return file_chflags (netfs_node_netnode (np)->file, flags); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_utimes (struct iouser *cred, struct node *np, ++ struct timespec *atime, struct timespec *mtime) ++{ ++ union tv ++ { ++ struct timeval tv; ++ time_value_t tvt; ++ }; ++ union tv a, m; ++ if (atime) ++ { ++ TIMESPEC_TO_TIMEVAL (&a.tv, atime); ++ } ++ else ++ a.tv.tv_sec = a.tv.tv_usec = -1; ++ if (mtime) ++ { ++ TIMESPEC_TO_TIMEVAL (&m.tv, mtime); ++ } ++ else ++ m.tv.tv_sec = m.tv.tv_usec = -1; ++ ++ return file_utimes (netfs_node_netnode (np)->file, a.tvt, m.tvt); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_set_size (struct iouser *cred, struct node *np, off_t size) ++{ ++ return file_set_size (netfs_node_netnode (np)->file, size); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_statfs (struct iouser *cred, struct node *np, struct statfs *st) ++{ ++ return file_statfs (netfs_node_netnode (np)->file, st); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_sync (struct iouser *cred, struct node *np, int wait) ++{ ++ return file_sync (netfs_node_netnode (np)->file, wait, 0); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_syncfs (struct iouser *cred, int wait) ++{ ++ return 0; ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_mkdir (struct iouser *user, struct node *dir, ++ char *name, mode_t mode) ++{ ++ return dir_mkdir (netfs_node_netnode (dir)->file, name, mode | S_IRWXU); ++} ++ ++ ++/* XXX ++ Removing a node should mark the netnode so that it is GC'd when ++ it has no hard refs. ++ */ ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_unlink (struct iouser *user, struct node *dir, char *name) ++{ ++ return dir_unlink (netfs_node_netnode (dir)->file, name); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_rename (struct iouser *user, struct node *fromdir, ++ char *fromname, struct node *todir, ++ char *toname, int excl) ++{ ++ return dir_rename (netfs_node_netnode (fromdir)->file, fromname, ++ netfs_node_netnode (todir)->file, toname, excl); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_rmdir (struct iouser *user, ++ struct node *dir, char *name) ++{ ++ return dir_rmdir (netfs_node_netnode (dir)->file, name); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_link (struct iouser *user, struct node *dir, ++ struct node *file, char *name, int excl) ++{ ++ return dir_link (netfs_node_netnode (dir)->file, ++ netfs_node_netnode (file)->file, name, excl); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_mkfile (struct iouser *user, struct node *dir, ++ mode_t mode, struct node **np) ++{ ++ file_t newfile; ++ error_t err = dir_mkfile (netfs_node_netnode (dir)->file, O_RDWR|O_EXEC, ++ mode, &newfile); ++ pthread_mutex_unlock (&dir->lock); ++ if (err) ++ return err; ++ ++ err = chroot_new_node (newfile, 0, np); ++ if (err) ++ return err; ++ ++ pthread_mutex_unlock (&(*np)->lock); ++ return err; ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_readlink (struct iouser *user, struct node *np, char *buf) ++{ ++ char transbuf[sizeof _HURD_SYMLINK + np->nn_stat.st_size + 1]; ++ char *trans = transbuf; ++ size_t translen = sizeof transbuf; ++ error_t err = file_get_translator (netfs_node_netnode (np)->file, ++ &trans, &translen); ++ if (err == 0) ++ { ++ if (translen < sizeof _HURD_SYMLINK ++ || memcmp (trans, _HURD_SYMLINK, sizeof _HURD_SYMLINK) != 0) ++ err = EINVAL; ++ else ++ { ++ assert (translen <= sizeof _HURD_SYMLINK + np->nn_stat.st_size + 1); ++ memcpy (buf, &trans[sizeof _HURD_SYMLINK], ++ translen - sizeof _HURD_SYMLINK); ++ } ++ if (trans != transbuf) ++ munmap (trans, translen); ++ } ++ return err; ++} ++ ++error_t __attribute__ ((weak)) ++netfs_get_dirents (struct iouser *cred, struct node *dir, ++ int entry, int nentries, char **data, ++ mach_msg_type_number_t *datacnt, ++ vm_size_t bufsize, int *amt) ++{ ++ error_t err; ++ err = dir_readdir (netfs_node_netnode (dir)->file, data, datacnt, ++ entry, nentries, bufsize, amt); ++ return err; ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_read (struct iouser *cred, struct node *np, ++ off_t offset, size_t *len, void *data) ++{ ++ char *buf = data; ++ error_t err = io_read (netfs_node_netnode (np)->file, ++ &buf, len, offset, *len); ++ if (err == 0 && buf != data) ++ { ++ memcpy (data, buf, *len); ++ munmap (buf, *len); ++ } ++ return err; ++} ++ ++error_t __attribute__ ((weak)) ++netfs_attempt_write (struct iouser *cred, struct node *np, ++ off_t offset, size_t *len, void *data) ++{ ++ return io_write (netfs_node_netnode (np)->file, data, *len, offset, len); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_report_access (struct iouser *cred, struct node *np, int *types) ++{ ++ return file_check_access (netfs_node_netnode (np)->file, types); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_file_get_storage_info (struct iouser *cred, ++ struct node *np, ++ mach_port_t **ports, ++ mach_msg_type_name_t *ports_type, ++ mach_msg_type_number_t *num_ports, ++ int **ints, ++ mach_msg_type_number_t *num_ints, ++ off_t **offsets, ++ mach_msg_type_number_t *num_offsets, ++ char **data, ++ mach_msg_type_number_t *data_len) ++{ ++ *ports_type = MACH_MSG_TYPE_MOVE_SEND; ++ return file_get_storage_info (netfs_node_netnode (np)->file, ++ ports, num_ports, ++ ints, num_ints, ++ offsets, num_offsets, ++ data, data_len); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_S_file_exec (struct protid *user, ++ task_t task, ++ int flags, ++ char *argv, ++ size_t argvlen, ++ char *envp, ++ size_t envplen, ++ mach_port_t *fds, ++ size_t fdslen, ++ mach_port_t *portarray, ++ size_t portarraylen, ++ int *intarray, ++ size_t intarraylen, ++ mach_port_t *deallocnames, ++ size_t deallocnameslen, ++ mach_port_t *destroynames, ++ size_t destroynameslen) ++{ ++ error_t err; ++ file_t file; ++ ++ if (!user) ++ return EOPNOTSUPP; ++ ++ file = netfs_node_netnode (user->po->np)->file; ++ err = mach_port_mod_refs (mach_task_self (), ++ file, MACH_PORT_RIGHT_SEND, 1); ++ ++ if (!err) ++ { ++ /* We cannot use MACH_MSG_TYPE_MOVE_SEND because we might need to ++ retry an interrupted call that would have consumed the rights. */ ++ err = file_exec (file, task, flags, argv, argvlen, ++ envp, envplen, fds, MACH_MSG_TYPE_COPY_SEND, fdslen, ++ portarray, MACH_MSG_TYPE_COPY_SEND, portarraylen, ++ intarray, intarraylen, deallocnames, deallocnameslen, ++ destroynames, destroynameslen); ++ mach_port_deallocate (mach_task_self (), file); ++ } ++ ++ if (err == 0) ++ { ++ size_t i; ++ mach_port_deallocate (mach_task_self (), task); ++ for (i = 0; i < fdslen; ++i) ++ mach_port_deallocate (mach_task_self (), fds[i]); ++ for (i = 0; i < portarraylen; ++i) ++ mach_port_deallocate (mach_task_self (), portarray[i]); ++ } ++ return err; ++} ++ ++error_t __attribute__ ((weak)) ++netfs_S_io_map (struct protid *user, ++ mach_port_t *rdobj, mach_msg_type_name_t *rdobjtype, ++ mach_port_t *wrobj, mach_msg_type_name_t *wrobjtype) ++{ ++ if (!user) ++ return EOPNOTSUPP; ++ *rdobjtype = *wrobjtype = MACH_MSG_TYPE_MOVE_SEND; ++ ++ return io_map (netfs_node_netnode (user->po->np)->file, rdobj, wrobj); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_S_io_map_cntl (struct protid *user, ++ mach_port_t *obj, ++ mach_msg_type_name_t *objtype) ++{ ++ if (!user) ++ return EOPNOTSUPP; ++ *objtype = MACH_MSG_TYPE_MOVE_SEND; ++ ++ return io_map_cntl (netfs_node_netnode (user->po->np)->file, obj); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_S_io_identity (struct protid *user, ++ mach_port_t *id, ++ mach_msg_type_name_t *idtype, ++ mach_port_t *fsys, ++ mach_msg_type_name_t *fsystype, ++ ino_t *fileno) ++{ ++ if (!user) ++ return EOPNOTSUPP; ++ ++ *idtype = *fsystype = MACH_MSG_TYPE_MOVE_SEND; ++ ++ return io_identity (netfs_node_netnode (user->po->np)->file, ++ id, fsys, fileno); ++} ++ ++#define NETFS_S_SIMPLE(name) \ ++error_t __attribute__ ((weak)) \ ++netfs_S_##name (struct protid *user) \ ++{ \ ++ if (!user) \ ++ return EOPNOTSUPP; \ ++ \ ++ return name (netfs_node_netnode (user->po->np)->file); \ ++} ++ ++NETFS_S_SIMPLE (io_get_conch) ++NETFS_S_SIMPLE (io_release_conch) ++NETFS_S_SIMPLE (io_eofnotify) ++NETFS_S_SIMPLE (io_readnotify) ++NETFS_S_SIMPLE (io_readsleep) ++NETFS_S_SIMPLE (io_sigio) ++ ++error_t __attribute__ ((weak)) ++netfs_S_io_prenotify (struct protid *user, ++ vm_offset_t start, vm_offset_t stop) ++{ ++ if (!user) ++ return EOPNOTSUPP; ++ ++ return io_prenotify (netfs_node_netnode (user->po->np)->file, start, stop); ++} ++ ++error_t __attribute__ ((weak)) ++netfs_S_io_postnotify (struct protid *user, ++ vm_offset_t start, vm_offset_t stop) ++{ ++ if (!user) ++ return EOPNOTSUPP; ++ ++ return io_postnotify (netfs_node_netnode (user->po->np)->file, start, stop); ++} ++ ++/* This overrides the library's definition. */ ++int __attribute__ ((weak)) ++netfs_demuxer (mach_msg_header_t *inp, ++ mach_msg_header_t *outp) ++{ ++ mig_routine_t routine; ++ if ((routine = netfs_io_server_routine (inp)) || ++ (routine = netfs_fs_server_routine (inp)) || ++ (routine = ports_notify_server_routine (inp)) || ++ (routine = netfs_fsys_server_routine (inp)) || ++ /* XXX we should intercept interrupt_operation and do ++ the ports_S_interrupt_operation work as well as ++ sending an interrupt_operation to the underlying file. ++ */ ++ (routine = ports_interrupt_server_routine (inp))) ++ { ++ (*routine) (inp, outp); ++ return TRUE; ++ } ++ else ++ { ++ /* We didn't recognize the message ID, so pass the message through ++ unchanged to the underlying file. */ ++ struct protid *cred; ++ if (MACH_MSGH_BITS_LOCAL (inp->msgh_bits) == ++ MACH_MSG_TYPE_PROTECTED_PAYLOAD) ++ cred = ports_lookup_payload (netfs_port_bucket, ++ inp->msgh_protected_payload, ++ netfs_protid_class); ++ else ++ cred = ports_lookup_port (netfs_port_bucket, ++ inp->msgh_local_port, ++ netfs_protid_class); ++ if (cred == 0) ++ /* This must be an unknown message on our fsys control port. */ ++ return 0; ++ else ++ { ++ error_t err; ++ assert (MACH_MSGH_BITS_LOCAL (inp->msgh_bits) ++ == MACH_MSG_TYPE_MOVE_SEND ++ || MACH_MSGH_BITS_LOCAL (inp->msgh_bits) ++ == MACH_MSG_TYPE_PROTECTED_PAYLOAD); ++ inp->msgh_bits = (inp->msgh_bits & MACH_MSGH_BITS_COMPLEX) ++ | MACH_MSGH_BITS (MACH_MSG_TYPE_COPY_SEND, ++ MACH_MSGH_BITS_REMOTE (inp->msgh_bits)); ++ inp->msgh_local_port = inp->msgh_remote_port; /* reply port */ ++ inp->msgh_remote_port = netfs_node_netnode (cred->po->np)->file; ++ err = mach_msg (inp, MACH_SEND_MSG, inp->msgh_size, 0, ++ MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, ++ MACH_PORT_NULL); ++ if (err) ++ ((mig_reply_header_t *) outp)->RetCode = err; ++ else ++ /* We already sent the message, so the server loop ++ shouldn't do it again. */ ++ ((mig_reply_header_t *) outp)->RetCode = MIG_NO_REPLY; ++ ports_port_deref (cred); ++ return 1; ++ } ++ } ++} +diff --git a/trans/chroot.h b/trans/chroot.h +new file mode 100644 +index 0000000..057a251 +--- /dev/null ++++ b/trans/chroot.h +@@ -0,0 +1,34 @@ ++#ifndef __HURD_CHROOT_H__ ++#define __HURD_CHROOT_H__ ++ ++struct netnode ++{ ++ file_t file; /* port on real file */ ++}; ++ ++struct chroot_node; ++ ++error_t chroot_init (void); ++ ++/* Make a new virtual node. Always consumes the ports. If ++ successful, NP will be locked. */ ++error_t chroot_new_node (file_t file, size_t size, struct node **np); ++ ++/* Users must implement this. */ ++void chroot_node_norefs (struct node *np); ++ ++/* Return the address of the chroot_node for NODE. NODE must have been ++ allocated using chroot_new_node. */ ++static inline struct chroot_node * ++chroot_node (struct node *node) ++{ ++ return (struct chroot_node *) ((char *) netfs_node_netnode (node) ++ + sizeof (struct netnode)); ++} ++ ++// XXX ++pthread_mutex_t idport_ihash_lock; ++struct hurd_ihash idport_ihash; ++ ++ ++#endif /* __HURD_CHROOT_H__ */ +diff --git a/trans/identity.c b/trans/identity.c +new file mode 100644 +index 0000000..875fc4f +--- /dev/null ++++ b/trans/identity.c +@@ -0,0 +1,113 @@ ++/* identity -- a translator interposing file RPCs. ++ Copyright (C) 2016 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ ++ ++#include <argp.h> ++#include <error.h> ++#include <fcntl.h> ++#include <hurd/netfs.h> ++#include <stdio.h> ++#include <stdlib.h> ++#include <string.h> ++#include <unistd.h> ++ ++#include <version.h> ++ ++#include "chroot.h" ++ ++const char *argp_program_version = STANDARD_HURD_VERSION (identity); ++ ++char *netfs_server_name = "identity"; ++char *netfs_server_version = HURD_VERSION; ++int netfs_maxsymlinks = 16; /* arbitrary */ ++ ++struct chroot_node ++{ ++}; ++ ++void ++chroot_node_norefs (struct node *np) ++{ ++} ++ ++ ++static struct argp_option options[] = ++{ ++ {0} ++}; ++ ++static char *args_doc = ""; ++static char *doc = ++ "The identity translator relays file RPCs without changing them." ++ "\v" ++ "It can be used in conjunction with settrans --chroot to implement " ++ "a hurdish chroot utility."; ++ ++static error_t ++parse_opt (int key, char *arg, struct argp_state *state) ++{ ++ switch (key) ++ { ++ default: ++ return ARGP_ERR_UNKNOWN; ++ } ++ return 0; ++} ++ ++int ++main (int argc, char **argv) ++{ ++ error_t err; ++ mach_port_t bootstrap; ++ ++ struct argp argp = ++ { ++ .options = options, ++ .parser = parse_opt, ++ .args_doc = args_doc, ++ .doc = doc, ++ }; ++ ++ /* Parse our command line arguments (all none of them). */ ++ argp_parse (&argp, argc, argv, 0, 0, 0); ++ ++ task_get_bootstrap_port (mach_task_self (), &bootstrap); ++ if (! MACH_PORT_VALID (bootstrap)) ++ error (1, 0, "Must be started as a translator"); ++ ++ netfs_init (); ++ chroot_init (); ++ ++ /* Get our underlying node (we presume it's a directory) and use ++ that to make the root node of the filesystem. */ ++ err = chroot_new_node (netfs_startup (bootstrap, O_READ), ++ sizeof (struct chroot_node), &netfs_root_node); ++ if (err) ++ error (5, err, "Cannot create root node"); ++ ++ err = netfs_validate_stat (netfs_root_node, 0); ++ if (err) ++ error (6, err, "Cannot stat underlying node"); ++ ++ netfs_root_node->nn_stat.st_mode &= ~(S_IPTRANS | S_IATRANS); ++ netfs_root_node->nn_stat.st_mode |= S_IROOT; ++ pthread_mutex_unlock (&netfs_root_node->lock); ++ ++ netfs_server_loop (); /* Never returns. */ ++ ++ /*NOTREACHED*/ ++ return 0; ++} +-- +2.1.4 + |