-
Simon McVittie authored
This is good for two reasons. In a Flatpak runtime, we will not be able to do tricks with arbitrary bind-mounts; if we want the host library stack, we will have to rewrite the mutable copy of the runtime to replace container libraries with symlinks into /run/host. Also, when not in a Flatpak runtime, having a mutable copy of the immutable runtime gives developers a chance to edit the runtime to inject workarounds or things they're testing. Signed-off-by:
Simon McVittie <smcv@collabora.com>
Simon McVittie authoredThis is good for two reasons. In a Flatpak runtime, we will not be able to do tricks with arbitrary bind-mounts; if we want the host library stack, we will have to rewrite the mutable copy of the runtime to replace container libraries with symlinks into /run/host. Also, when not in a Flatpak runtime, having a mutable copy of the immutable runtime gives developers a chance to edit the runtime to inject workarounds or things they're testing. Signed-off-by:
Simon McVittie <smcv@collabora.com>
runtime.c 88.40 KiB
/*
* Copyright © 2020 Collabora Ltd.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "src/runtime.h"
#include <sysexits.h>
#include <gio/gio.h>
/* Include these before steam-runtime-tools.h so that their backport of
* G_DEFINE_AUTOPTR_CLEANUP_FUNC will be visible to it */
#include "glib-backports.h"
#include "libglnx/libglnx.h"
#include <steam-runtime-tools/steam-runtime-tools.h>
#include "bwrap.h"
#include "bwrap-lock.h"
#include "enumtypes.h"
#include "flatpak-run-private.h"
#include "utils.h"
/*
* PvRuntime:
*
* Object representing a runtime to be used as the /usr for a game.
*/
struct _PvRuntime
{
GObject parent;
gchar *bubblewrap;
gchar *source_files;
gchar *tools_dir;
PvBwrapLock *runtime_lock;
gchar *mutable_parent;
gchar *mutable_sysroot;
gchar *tmpdir;
gchar *overrides;
gchar *overrides_bin;
gchar *container_access;
FlatpakBwrap *container_access_adverb;
const gchar *runtime_files; /* either source_files or mutable_sysroot */
gchar *runtime_usr; /* either runtime_files or that + "/usr" */
PvRuntimeFlags flags;
int mutable_parent_fd;
int mutable_sysroot_fd;
gboolean any_libc_from_host;
gboolean all_libc_from_host;
gboolean runtime_is_just_usr;
};
struct _PvRuntimeClass
{
GObjectClass parent;
};
enum {
PROP_0,
PROP_BUBBLEWRAP,
PROP_FLAGS,
PROP_MUTABLE_PARENT,
PROP_SOURCE_FILES,
PROP_TOOLS_DIRECTORY,
N_PROPERTIES
};
static GParamSpec *properties[N_PROPERTIES] = { NULL };
static void pv_runtime_initable_iface_init (GInitableIface *iface,
gpointer unused);
G_DEFINE_TYPE_WITH_CODE (PvRuntime, pv_runtime, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
pv_runtime_initable_iface_init))
/*
* Supported Debian-style multiarch tuples
*/
static const char * const multiarch_tuples[] =
{
"x86_64-linux-gnu",
"i386-linux-gnu",
NULL
};
/*
* Directories other than /usr/lib that we must search for loadable
* modules, in the same order as multiarch_tuples
*/
static const char * const libquals[] =
{
"lib64",
"lib32"
};
G_STATIC_ASSERT (G_N_ELEMENTS (libquals)
== G_N_ELEMENTS (multiarch_tuples) - 1);
typedef struct
{
gsize multiarch_index;
const char *tuple;
gchar *capsule_capture_libs_basename;
gchar *capsule_capture_libs;
gchar *libdir_on_host;
gchar *libdir_in_container;
const char *libqual;
gchar *ld_so;
} RuntimeArchitecture;
static gboolean
runtime_architecture_init (RuntimeArchitecture *self,
PvRuntime *runtime)
{
const gchar *argv[] = { NULL, "--print-ld.so", NULL };
g_return_val_if_fail (self->multiarch_index < G_N_ELEMENTS (libquals), FALSE);
g_return_val_if_fail (self->multiarch_index < G_N_ELEMENTS (multiarch_tuples) - 1,
FALSE);
g_return_val_if_fail (self->tuple == NULL, FALSE);
self->tuple = multiarch_tuples[self->multiarch_index];
g_return_val_if_fail (self->tuple != NULL, FALSE);
self->libqual = libquals[self->multiarch_index];
self->capsule_capture_libs_basename = g_strdup_printf ("%s-capsule-capture-libs",
self->tuple);
self->capsule_capture_libs = g_build_filename (runtime->tools_dir,
self->capsule_capture_libs_basename,
NULL);
self->libdir_on_host = g_build_filename (runtime->overrides, "lib",
self->tuple, NULL);
self->libdir_in_container = g_build_filename ("/overrides", "lib",
self->tuple, NULL);
/* This has the side-effect of testing whether we can run binaries
* for this architecture on the host system. */
argv[0] = self->capsule_capture_libs;
self->ld_so = pv_capture_output (argv, NULL);
if (self->ld_so == NULL)
{
g_debug ("Cannot determine ld.so for %s", self->tuple);
return FALSE;
}
return TRUE;
}
static gboolean
runtime_architecture_check_valid (RuntimeArchitecture *self)
{
g_return_val_if_fail (self->multiarch_index < G_N_ELEMENTS (libquals), FALSE);
g_return_val_if_fail (self->tuple == multiarch_tuples[self->multiarch_index], FALSE);
g_return_val_if_fail (self->capsule_capture_libs_basename != NULL, FALSE);
g_return_val_if_fail (self->capsule_capture_libs != NULL, FALSE);
g_return_val_if_fail (self->libdir_on_host != NULL, FALSE);
g_return_val_if_fail (self->libdir_in_container != NULL, FALSE);
g_return_val_if_fail (self->libqual == libquals[self->multiarch_index], FALSE);
g_return_val_if_fail (self->ld_so != NULL, FALSE);
return TRUE;
}
static void
runtime_architecture_clear (RuntimeArchitecture *self)
{
self->multiarch_index = G_MAXSIZE;
self->tuple = NULL;
self->libqual = NULL;
g_clear_pointer (&self->capsule_capture_libs_basename, g_free);
g_clear_pointer (&self->capsule_capture_libs, g_free);
g_clear_pointer (&self->libdir_on_host, g_free);
g_clear_pointer (&self->libdir_in_container, g_free);
g_clear_pointer (&self->ld_so, g_free);
}
G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC (RuntimeArchitecture,
runtime_architecture_clear)
static gboolean pv_runtime_use_host_graphics_stack (PvRuntime *self,
FlatpakBwrap *bwrap,
GError **error);
static void pv_runtime_set_search_paths (PvRuntime *self,
FlatpakBwrap *bwrap);
static void
pv_runtime_init (PvRuntime *self)
{
self->any_libc_from_host = FALSE;
self->all_libc_from_host = FALSE;
self->mutable_parent_fd = -1;
self->mutable_sysroot_fd = -1;
}
static void
pv_runtime_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
PvRuntime *self = PV_RUNTIME (object);
switch (prop_id)
{
case PROP_BUBBLEWRAP:
g_value_set_string (value, self->bubblewrap);
break;
case PROP_FLAGS:
g_value_set_flags (value, self->flags);
break;
case PROP_MUTABLE_PARENT:
g_value_set_string (value, self->mutable_parent);
break;
case PROP_SOURCE_FILES:
g_value_set_string (value, self->source_files);
break;
case PROP_TOOLS_DIRECTORY:
g_value_set_string (value, self->tools_dir);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
pv_runtime_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
PvRuntime *self = PV_RUNTIME (object);
const char *path;
switch (prop_id)
{
case PROP_BUBBLEWRAP:
/* Construct-only */
g_return_if_fail (self->bubblewrap == NULL);
self->bubblewrap = g_value_dup_string (value);
break;
case PROP_FLAGS:
self->flags = g_value_get_flags (value);
break;
case PROP_MUTABLE_PARENT:
/* Construct-only */
g_return_if_fail (self->mutable_parent == NULL);
path = g_value_get_string (value);
if (path != NULL)
self->mutable_parent = flatpak_canonicalize_filename (path);
break;
case PROP_SOURCE_FILES:
/* Construct-only */
g_return_if_fail (self->source_files == NULL);
self->source_files = g_value_dup_string (value);
break;
case PROP_TOOLS_DIRECTORY:
/* Construct-only */
g_return_if_fail (self->tools_dir == NULL);
self->tools_dir = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
pv_runtime_constructed (GObject *object)
{
PvRuntime *self = PV_RUNTIME (object);
G_OBJECT_CLASS (pv_runtime_parent_class)->constructed (object);
g_return_if_fail (self->bubblewrap != NULL);
g_return_if_fail (self->source_files != NULL);
g_return_if_fail (self->tools_dir != NULL);
}
static gboolean
pv_runtime_init_mutable (PvRuntime *self,
GError **error)
{
g_autofree gchar *dest_usr = NULL;
g_autofree gchar *source_usr_subdir = NULL;
g_autofree gchar *temp_dir = NULL;
g_autoptr(GDir) dir = NULL;
g_autoptr(PvBwrapLock) copy_lock = NULL;
g_autoptr(PvBwrapLock) mutable_lock = NULL;
g_autoptr(PvBwrapLock) source_lock = NULL;
const char *member;
const char *source_usr;
glnx_autofd int temp_dir_fd = -1;
gboolean is_just_usr;
/* Nothing to do in this case */
if (self->mutable_parent == NULL)
return TRUE;
if (g_mkdir_with_parents (self->mutable_parent, 0700) != 0)
return glnx_throw_errno_prefix (error, "Unable to create %s",
self->mutable_parent);
if (!glnx_opendirat (AT_FDCWD, self->mutable_parent, TRUE,
&self->mutable_parent_fd, error))
return FALSE;
/* Lock the parent directory. Anything that directly manipulates the
* temporary runtimes (notably the deploy-runtime and run-in-steamrt
* scripts in SteamLinuxRuntime) is expected to do the same, so that
* it cannot be deleting temporary runtimes at the same time we're
* creating them.
*
* This is a read-mode lock: it's OK to create more than one temporary
* runtime in parallel, as long as nothing is deleting them
* concurrently. */
mutable_lock = pv_bwrap_lock_new (self->mutable_parent_fd, ".ref",
PV_BWRAP_LOCK_FLAGS_CREATE,
error);
if (mutable_lock == NULL)
return glnx_prefix_error (error, "Unable to lock \"%s/%s\"",
self->mutable_parent, ".ref");
temp_dir = g_build_filename (self->mutable_parent, "tmp-XXXXXX", NULL);
if (g_mkdtemp (temp_dir) == NULL)
return glnx_throw_errno_prefix (error,
"Cannot create temporary directory \"%s\"",
temp_dir);
source_usr_subdir = g_build_filename (self->source_files, "usr", NULL);
dest_usr = g_build_filename (temp_dir, "usr", NULL);
is_just_usr = !g_file_test (source_usr_subdir, G_FILE_TEST_IS_DIR);
if (is_just_usr)
{
/* ${source_files}/usr does not exist, so assume it's a merged /usr,
* for example ./scout/files. Copy ${source_files}/bin to
* ${temp_dir}/usr/bin, etc. */
source_usr = self->source_files;
if (!pv_cheap_tree_copy (self->source_files, dest_usr, error))
return FALSE;
}
else
{
/* ${source_files}/usr exists, so assume it's a complete sysroot.
* Copy ${source_files}/bin to ${temp_dir}/bin, etc. */
source_usr = source_usr_subdir;
if (!pv_cheap_tree_copy (self->source_files, temp_dir, error))
return FALSE;
}
if (!glnx_opendirat (-1, temp_dir, FALSE, &temp_dir_fd, error))
return FALSE;
/* Create the copy in a pre-locked state. After the lock on the parent
* directory is released, the copy continues to have a read lock,
* preventing it from being modified or deleted while in use (even if
* a cleanup process successfully obtains a write lock on the parent).
*
* Because we control the structure of the runtime in this case, we
* actually lock /usr/.ref instead of /.ref, and ensure that /.ref
* is a symlink to it. This might become important if we pass the
* runtime's /usr to Flatpak, which normally takes out a lock on
* /usr/.ref (obviously this will only work if the runtime happens
* to be merged-/usr). */
copy_lock = pv_bwrap_lock_new (temp_dir_fd, "usr/.ref",
PV_BWRAP_LOCK_FLAGS_CREATE,
error);
if (copy_lock == NULL)
return glnx_prefix_error (error,
"Unable to lock \"%s/.ref\" in temporary runtime",
dest_usr);
if (is_just_usr)
{
g_autofree gchar *in_root = g_build_filename (temp_dir, ".ref", NULL);
if (unlink (in_root) != 0 && errno != ENOENT)
return glnx_throw_errno_prefix (error,
"Cannot remove \"%s\"", in_root);
if (symlink ("usr/.ref", in_root) != 0)
return glnx_throw_errno_prefix (error,
"Cannot create symlink \"%s\" -> usr/.ref",
in_root);
}
dir = g_dir_open (source_usr, 0, error);
if (dir == NULL)
return FALSE;
for (member = g_dir_read_name (dir);
member != NULL;
member = g_dir_read_name (dir))
{
/* Create symlinks ${temp_dir}/bin -> usr/bin, etc. if missing.
*
* Also make ${temp_dir}/etc, ${temp_dir}/var symlinks to etc
* and var, for the benefit of tools like capsule-capture-libs
* accessing /etc/ld.so.cache in the incomplete container (for the
* final container command-line they get merged by bind_runtime()
* instead). */
if (g_str_equal (member, "bin") ||
g_str_equal (member, "etc") ||
(g_str_has_prefix (member, "lib") &&
!g_str_equal (member, "libexec")) ||
g_str_equal (member, "sbin") ||
g_str_equal (member, "var"))
{
g_autofree gchar *dest = g_build_filename (temp_dir, member, NULL);
g_autofree gchar *target = g_build_filename ("usr", member, NULL);
if (symlink (target, dest) != 0)
{
/* Ignore EEXIST in the case where it was not just /usr:
* it's fine if the runtime we copied from source_files
* already had either directories or symlinks in its root
* directory */
if (is_just_usr || errno != EEXIST)
return glnx_throw_errno_prefix (error,
"Cannot create symlink \"%s\" -> %s",
dest, target);
}
}
}
/* Hand over from holding a lock on the source to just holding a lock
* on the copy. We'll release source_lock when we leave this scope */
source_lock = g_steal_pointer (&self->runtime_lock);
self->runtime_lock = g_steal_pointer (©_lock);
self->mutable_sysroot = g_steal_pointer (&temp_dir);
self->mutable_sysroot_fd = glnx_steal_fd (&temp_dir_fd);
return TRUE;
}
static gboolean
pv_runtime_initable_init (GInitable *initable,
GCancellable *cancellable G_GNUC_UNUSED,
GError **error)
{
PvRuntime *self = PV_RUNTIME (initable);
g_autofree gchar *files_ref = NULL;
g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
if (!g_file_test (self->bubblewrap, G_FILE_TEST_IS_EXECUTABLE))
{
return glnx_throw (error, "\"%s\" is not executable",
self->bubblewrap);
}
if (self->mutable_parent != NULL
&& !g_file_test (self->mutable_parent, G_FILE_TEST_IS_DIR))
{
return glnx_throw (error, "\"%s\" is not a directory",
self->mutable_parent);
}
if (!g_file_test (self->source_files, G_FILE_TEST_IS_DIR))
{
return glnx_throw (error, "\"%s\" is not a directory",
self->source_files);
}
if (!g_file_test (self->tools_dir, G_FILE_TEST_IS_DIR))
{
return glnx_throw (error, "\"%s\" is not a directory",
self->tools_dir);
}
/* Take a lock on the runtime until we're finished with setup,
* to make sure it doesn't get deleted.
*
* If the runtime is mounted read-only in the container, it will
* continue to be locked until all processes in the container exit.
* If we make a temporary mutable copy, we only hold this lock until
* setup has finished. */
files_ref = g_build_filename (self->source_files, ".ref", NULL);
self->runtime_lock = pv_bwrap_lock_new (AT_FDCWD, files_ref,
PV_BWRAP_LOCK_FLAGS_CREATE,
error);
/* If the runtime is being deleted, ... don't use it, I suppose? */
if (self->runtime_lock == NULL)
return FALSE;
g_debug ("Creating temporary directories...");
/* Using a runtime requires a temporary directory */
self->tmpdir = g_dir_make_tmp ("pressure-vessel-wrap.XXXXXX", error);
if (self->tmpdir == NULL)
return FALSE;
if (!pv_runtime_init_mutable (self, error))
return FALSE;
if (self->mutable_sysroot != NULL)
self->runtime_files = self->mutable_sysroot;
else
self->runtime_files = self->source_files;
self->overrides = g_build_filename (self->tmpdir, "overrides", NULL);
g_mkdir (self->overrides, 0700);
self->overrides_bin = g_build_filename (self->overrides, "bin", NULL);
g_mkdir (self->overrides_bin, 0700);
self->runtime_usr = g_build_filename (self->runtime_files, "usr", NULL);
if (g_file_test (self->runtime_usr, G_FILE_TEST_IS_DIR))
{
self->runtime_is_just_usr = FALSE;
}
else
{
/* runtime_files is just a merged /usr. */
self->runtime_is_just_usr = TRUE;
g_free (self->runtime_usr);
self->runtime_usr = g_strdup (self->runtime_files);
}
return TRUE;
}
void
pv_runtime_cleanup (PvRuntime *self)
{
g_autoptr(GError) local_error = NULL;
g_return_if_fail (PV_IS_RUNTIME (self));
if (self->tmpdir != NULL &&
!glnx_shutil_rm_rf_at (-1, self->tmpdir, NULL, &local_error))
{
g_warning ("Unable to delete temporary directory: %s",
local_error->message);
}
g_clear_pointer (&self->overrides_bin, g_free);
g_clear_pointer (&self->overrides, g_free);
g_clear_pointer (&self->container_access, g_free);
g_clear_pointer (&self->container_access_adverb, flatpak_bwrap_free);
g_clear_pointer (&self->tmpdir, g_free);
}
static void
pv_runtime_finalize (GObject *object)
{
PvRuntime *self = PV_RUNTIME (object);
pv_runtime_cleanup (self);
g_free (self->bubblewrap);
glnx_close_fd (&self->mutable_parent_fd);
g_free (self->mutable_parent);
glnx_close_fd (&self->mutable_sysroot_fd);
g_free (self->mutable_sysroot);
g_free (self->runtime_usr);
g_free (self->source_files);
g_free (self->tools_dir);
if (self->runtime_lock != NULL)
pv_bwrap_lock_free (self->runtime_lock);
G_OBJECT_CLASS (pv_runtime_parent_class)->finalize (object);
}
static void
pv_runtime_class_init (PvRuntimeClass *cls)
{
GObjectClass *object_class = G_OBJECT_CLASS (cls);
object_class->get_property = pv_runtime_get_property;
object_class->set_property = pv_runtime_set_property;
object_class->constructed = pv_runtime_constructed;
object_class->finalize = pv_runtime_finalize;
properties[PROP_BUBBLEWRAP] =
g_param_spec_string ("bubblewrap", "Bubblewrap",
"Bubblewrap executable",
NULL,
(G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
properties[PROP_FLAGS] =
g_param_spec_flags ("flags", "Flags",
"Flags affecting how we set up the runtime",
PV_TYPE_RUNTIME_FLAGS, PV_RUNTIME_FLAGS_NONE,
(G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
properties[PROP_MUTABLE_PARENT] =
g_param_spec_string ("mutable-parent", "Mutable parent",
("Path to a directory in which to create a "
"mutable copy of source-files, or NULL"),
NULL,
(G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
properties[PROP_SOURCE_FILES] =
g_param_spec_string ("source-files", "Source files",
("Path to read-only runtime files (merged-/usr "
"or sysroot) on host system"),
NULL,
(G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
properties[PROP_TOOLS_DIRECTORY] =
g_param_spec_string ("tools-directory", "Tools directory",
"Path to pressure-vessel/bin on host system",
NULL,
(G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
g_object_class_install_properties (object_class, N_PROPERTIES, properties);
}
PvRuntime *
pv_runtime_new (const char *source_files,
const char *mutable_parent,
const char *bubblewrap,
const char *tools_dir,
PvRuntimeFlags flags,
GError **error)
{
g_return_val_if_fail (source_files != NULL, NULL);
g_return_val_if_fail (bubblewrap != NULL, NULL);
g_return_val_if_fail (tools_dir != NULL, NULL);
g_return_val_if_fail ((flags & ~(PV_RUNTIME_FLAGS_MASK)) == 0, NULL);
return g_initable_new (PV_TYPE_RUNTIME,
NULL,
error,
"bubblewrap", bubblewrap,
"mutable-parent", mutable_parent,
"source-files", source_files,
"tools-directory", tools_dir,
"flags", flags,
NULL);
}
/* If we are using a runtime, pass the lock fd to the executed process,
* and make it act as a subreaper for the game itself.
*
* If we were using --unshare-pid then we could use bwrap --sync-fd
* and rely on bubblewrap's init process for this, but we currently
* can't do that without breaking gameoverlayrender.so's assumptions. */
void
pv_runtime_append_lock_adverb (PvRuntime *self,
FlatpakBwrap *bwrap)
{
g_return_if_fail (PV_IS_RUNTIME (self));
g_return_if_fail (!pv_bwrap_was_finished (bwrap));
flatpak_bwrap_add_args (bwrap,
"/run/pressure-vessel/bin/pressure-vessel-with-lock",
"--subreaper",
NULL);
if (pv_bwrap_lock_is_ofd (self->runtime_lock))
{
int fd = pv_bwrap_lock_steal_fd (self->runtime_lock);
g_autofree gchar *fd_str = NULL;
g_debug ("Passing lock fd %d down to with-lock", fd);
flatpak_bwrap_add_fd (bwrap, fd);
fd_str = g_strdup_printf ("%d", fd);
flatpak_bwrap_add_args (bwrap,
"--fd", fd_str,
NULL);
}
else
{
/*
* We were unable to take out an open file descriptor lock,
* so it will be released on fork(). Tell the with-lock process
* to take out its own compatible lock instead. There will be
* a short window during which we have lost our lock but the
* with-lock process has not taken its lock - that's unavoidable
* if we want to use exec() to replace ourselves with the
* container.
*
* pv_bwrap_bind_usr() arranges for /.ref to either be a
* symbolic link to /usr/.ref which is the runtime_lock
* (if opt_runtime is a merged /usr), or the runtime_lock
* itself (otherwise).
*/
g_debug ("Telling process in container to lock /.ref");
flatpak_bwrap_add_args (bwrap,
"--lock-file", "/.ref",
NULL);
}
flatpak_bwrap_add_args (bwrap,
"--",
NULL);
}
/*
* Set self->container_access_adverb to a (possibly empty) command prefix
* that will result in the container being available at
* self->container_access, with write access to self->overrides, and
* read-only access to everything else.
*/
static gboolean
pv_runtime_provide_container_access (PvRuntime *self,
GError **error)
{
if (self->container_access_adverb != NULL)
return TRUE;
if (!self->runtime_is_just_usr)
{
static const char * const need_top_level[] =
{
"bin",
"etc",
"lib",
"sbin",
};
gsize i;
/* If we are working with a runtime that has a root directory containing
* /etc and /usr, we can just access it via its path - that's "the same
* shape" that the final system is going to be.
*
* In particular, if we are working with a writeable copy of a runtime
* that we are editing in-place, it's always like that. */
g_debug ("%s: Setting up runtime without using bwrap",
G_STRFUNC);
self->container_access_adverb = flatpak_bwrap_new (NULL);
self->container_access = g_strdup (self->runtime_files);
/* This is going to go poorly for us if the runtime is not complete.
* !self->runtime_is_just_usr means we know it has a /usr subdirectory,
* but that doesn't guarantee that it has /bin, /lib, /sbin (either
* in the form of real directories or symlinks into /usr) and /etc
* (for at least /etc/alternatives and /etc/ld.so.cache).
*
* This check is not intended to be exhaustive, merely something
* that will catch obvious mistakes like completely forgetting to
* add the merged-/usr symlinks.
*
* In practice we also need /lib64 for 64-bit-capable runtimes,
* but a pure 32-bit runtime would legitimately not have that,
* so we don't check for it. */
for (i = 0; i < G_N_ELEMENTS (need_top_level); i++)
{
g_autofree gchar *path = g_build_filename (self->runtime_files,
need_top_level[i],
NULL);
if (!g_file_test (path, G_FILE_TEST_IS_DIR))
g_warning ("%s does not exist, this probably won't work",
path);
}
}
else
{
/* Otherwise, will we need to use bwrap to build a directory hierarchy
* that is the same shape as the final system. */
g_debug ("%s: Using bwrap to set up runtime that is just /usr",
G_STRFUNC);
/* By design, writeable copies of the runtime never need this:
* the writeable copy is a complete sysroot, not just a merged /usr. */
g_assert (self->mutable_sysroot == NULL);
self->container_access = g_build_filename (self->tmpdir, "mnt", NULL);
g_mkdir (self->container_access, 0700);
self->container_access_adverb = flatpak_bwrap_new (NULL);
flatpak_bwrap_add_args (self->container_access_adverb,
self->bubblewrap,
"--ro-bind", "/", "/",
"--bind", self->overrides, self->overrides,
"--tmpfs", self->container_access,
NULL);
if (!pv_bwrap_bind_usr (self->container_access_adverb,
self->runtime_files,
self->container_access,
error))
return FALSE;
}
return TRUE;
}
static gboolean
try_bind_dri (PvRuntime *self,
RuntimeArchitecture *arch,
FlatpakBwrap *bwrap,
const char *libdir,
GError **error)
{
g_autofree gchar *dri = g_build_filename (libdir, "dri", NULL);
g_autofree gchar *s2tc = g_build_filename (libdir, "libtxc_dxtn.so", NULL);
if (g_file_test (dri, G_FILE_TEST_IS_DIR))
{
g_autoptr(FlatpakBwrap) temp_bwrap = NULL;
g_autofree gchar *expr = NULL;
g_autoptr(GDir) dir = NULL;
const char *member;
g_debug ("Collecting dependencies of DRI drivers in \"%s\"...", dri);
expr = g_strdup_printf ("only-dependencies:if-exists:path-match:%s/dri/*.so",
libdir);
if (!pv_runtime_provide_container_access (self, error))
return FALSE;
temp_bwrap = pv_bwrap_copy (self->container_access_adverb);
flatpak_bwrap_add_args (temp_bwrap,
arch->capsule_capture_libs,
"--container", self->container_access,
"--link-target", "/run/host",
"--dest", arch->libdir_on_host,
"--provider", "/",
expr,
NULL);
flatpak_bwrap_finish (temp_bwrap);
if (!pv_bwrap_run_sync (temp_bwrap, NULL, error))
return FALSE;
g_clear_pointer (&temp_bwrap, flatpak_bwrap_free);
dir = g_dir_open (dri, 0, error);
if (dir == NULL)
return FALSE;
for (member = g_dir_read_name (dir);
member != NULL;
member = g_dir_read_name (dir))
{
g_autofree gchar *target = g_build_filename ("/run/host", dri,
member, NULL);
g_autofree gchar *dest = g_build_filename (arch->libdir_on_host,
"dri", member, NULL);
g_debug ("Creating symbolic link \"%s\" -> \"%s\" for \"%s\" DRI driver",
dest, target, arch->tuple);
/* Delete an existing symlink if any, like ln -f */
if (unlink (dest) != 0 && errno != ENOENT)
return glnx_throw_errno_prefix (error,
"Unable to remove \"%s\"",
dest);
if (symlink (target, dest) != 0)
return glnx_throw_errno_prefix (error,
"Unable to create symlink \"%s\" -> \"%s\"",
dest, target);
}
}
if (g_file_test (s2tc, G_FILE_TEST_EXISTS))
{
g_autoptr(FlatpakBwrap) temp_bwrap = NULL;
g_autofree gchar *expr = NULL;
g_debug ("Collecting s2tc \"%s\" and its dependencies...", s2tc);
expr = g_strdup_printf ("path-match:%s", s2tc);
if (!pv_runtime_provide_container_access (self, error))
return FALSE;
temp_bwrap = pv_bwrap_copy (self->container_access_adverb);
flatpak_bwrap_add_args (temp_bwrap,
arch->capsule_capture_libs,
"--container", self->container_access,
"--link-target", "/run/host",
"--dest", arch->libdir_on_host,
"--provider", "/",
expr,
NULL);
flatpak_bwrap_finish (temp_bwrap);
if (!pv_bwrap_run_sync (temp_bwrap, NULL, error))
return FALSE;
}
return TRUE;
}
/*
* Try to make sure we have all the locales we need, by running
* the helper from steam-runtime-tools in the container. If this
* fails, it isn't fatal - carry on anyway.
*
* @bwrap must be set up to have the same libc that we will be using
* for the container.
*/
static void
ensure_locales (PvRuntime *self,
gboolean on_host,
FlatpakBwrap *bwrap)
{
g_autoptr(GError) local_error = NULL;
g_autoptr(FlatpakBwrap) run_locale_gen = NULL;
g_autofree gchar *locale_gen = NULL;
g_autofree gchar *locales = g_build_filename (self->overrides, "locales", NULL);
g_autoptr(GDir) dir = NULL;
int exit_status;
/* bwrap can't own any fds yet, because if it did,
* flatpak_bwrap_append_bwrap() would steal them. */
g_return_if_fail (bwrap->fds == NULL || bwrap->fds->len == 0);
g_mkdir (locales, 0700);
run_locale_gen = flatpak_bwrap_new (NULL);
if (on_host)
{
locale_gen = g_build_filename (self->tools_dir,
"pressure-vessel-locale-gen",
NULL);
/* We don't actually need to use bwrap when we're just running on
* the host system. */
flatpak_bwrap_add_args (run_locale_gen,
locale_gen,
"--output-dir", locales,
"--verbose",
NULL);
}
else
{
locale_gen = g_build_filename ("/run/host/tools",
"pressure-vessel-locale-gen",
NULL);
flatpak_bwrap_append_bwrap (run_locale_gen, bwrap);
pv_bwrap_copy_tree (run_locale_gen, self->overrides, "/overrides");
if (!flatpak_bwrap_bundle_args (run_locale_gen, 1, -1, FALSE,
&local_error))
{
g_warning ("Unable to set up locale-gen command: %s",
local_error->message);
g_clear_error (&local_error);
}
flatpak_bwrap_add_args (run_locale_gen,
"--ro-bind", self->tools_dir, "/run/host/tools",
"--bind", locales, "/overrides/locales",
locale_gen,
"--output-dir", "/overrides/locales",
"--verbose",
NULL);
}
flatpak_bwrap_finish (run_locale_gen);
/* locale-gen exits 72 (EX_OSFILE) if it had to correct for
* missing locales at OS level. This is not an error. */
if (!pv_bwrap_run_sync (run_locale_gen, &exit_status, &local_error))
{
if (exit_status == EX_OSFILE)
g_debug ("pressure-vessel-locale-gen created missing locales");
else
g_warning ("Unable to generate locales: %s", local_error->message);
g_clear_error (&local_error);
}
else
{
g_debug ("No locales generated");
}
dir = g_dir_open (locales, 0, NULL);
/* If the directory is not empty, make it the container's LOCPATH */
if (dir != NULL && g_dir_read_name (dir) != NULL)
{
g_autoptr(GString) locpath = NULL;
g_debug ("%s is non-empty", locales);
locpath = g_string_new ("/overrides/locales");
pv_search_path_append (locpath, g_getenv ("LOCPATH"));
flatpak_bwrap_add_args (bwrap,
"--setenv", "LOCPATH", locpath->str,
NULL);
}
else
{
g_debug ("%s is empty", locales);
}
}
typedef enum
{
ICD_KIND_NONEXISTENT,
ICD_KIND_ABSOLUTE,
ICD_KIND_SONAME
} IcdKind;
typedef struct
{
/* (type SrtEglIcd) or (type SrtVulkanIcd) or (type SrtVdpauDriver)
* or (type SrtVaApiDriver) */
gpointer icd;
gchar *resolved_library;
/* Last entry is always NONEXISTENT.
* For VA-API, we use [0] and ignore the other elements.
* For the rest, this is keyed by the index of a multiarch tuple
* in multiarch_tuples. */
IcdKind kinds[G_N_ELEMENTS (multiarch_tuples)];
/* Last entry is always NULL */
gchar *paths_in_container[G_N_ELEMENTS (multiarch_tuples)];
} IcdDetails;
static IcdDetails *
icd_details_new (gpointer icd)
{
IcdDetails *self;
gsize i;
g_return_val_if_fail (G_IS_OBJECT (icd), NULL);
g_return_val_if_fail (SRT_IS_EGL_ICD (icd) ||
SRT_IS_VULKAN_ICD (icd) ||
SRT_IS_VDPAU_DRIVER (icd) ||
SRT_IS_VA_API_DRIVER (icd),
NULL);
self = g_slice_new0 (IcdDetails);
self->icd = g_object_ref (icd);
self->resolved_library = NULL;
for (i = 0; i < G_N_ELEMENTS (multiarch_tuples); i++)
{
self->kinds[i] = ICD_KIND_NONEXISTENT;
self->paths_in_container[i] = NULL;
}
return self;
}
static void
icd_details_free (IcdDetails *self)
{
gsize i;
g_object_unref (self->icd);
g_free (self->resolved_library);
for (i = 0; i < G_N_ELEMENTS (multiarch_tuples); i++)
g_free (self->paths_in_container[i]);
g_slice_free (IcdDetails, self);
}
G_DEFINE_AUTOPTR_CLEANUP_FUNC (IcdDetails, icd_details_free)
/*
* @sequence_number: numbered directory to use. Set to G_MAXSIZE to
* use just @subdir without a numbered sub directory
*/
static gboolean
bind_icd (PvRuntime *self,
RuntimeArchitecture *arch,
gsize sequence_number,
const char *subdir,
IcdDetails *details,
GError **error)
{
static const char options[] = "if-exists:if-same-abi";
g_autofree gchar *on_host = NULL;
g_autofree gchar *pattern = NULL;
g_autofree gchar *dependency_pattern = NULL;
g_autofree gchar *seq_str = NULL;
const char *mode;
g_autoptr(FlatpakBwrap) temp_bwrap = NULL;
gsize multiarch_index;
g_return_val_if_fail (runtime_architecture_check_valid (arch), FALSE);
g_return_val_if_fail (subdir != NULL, FALSE);
g_return_val_if_fail (details != NULL, FALSE);
g_return_val_if_fail (details->resolved_library != NULL, FALSE);
multiarch_index = arch->multiarch_index;
g_return_val_if_fail (details->kinds[multiarch_index] == ICD_KIND_NONEXISTENT,
FALSE);
g_return_val_if_fail (details->paths_in_container[multiarch_index] == NULL,
FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
if (g_path_is_absolute (details->resolved_library))
{
details->kinds[multiarch_index] = ICD_KIND_ABSOLUTE;
mode = "path";
/* Because the ICDs might have collisions among their
* basenames (might differ only by directory), we put each
* in its own numbered directory. */
if (sequence_number != G_MAXSIZE)
{
seq_str = g_strdup_printf ("%" G_GSIZE_FORMAT, sequence_number);
on_host = g_build_filename (arch->libdir_on_host, subdir, seq_str, NULL);
}
else
{
on_host = g_build_filename (arch->libdir_on_host, subdir, NULL);
}
g_debug ("Ensuring %s exists", on_host);
if (g_mkdir_with_parents (on_host, 0700) != 0)
return glnx_throw_errno_prefix (error, "Unable to create %s", on_host);
}
else
{
/* ICDs in the default search path by definition can't collide:
* one of them is the first one we find, and we use that one. */
details->kinds[multiarch_index] = ICD_KIND_SONAME;
mode = "soname";
}
pattern = g_strdup_printf ("no-dependencies:even-if-older:%s:%s:%s",
options, mode, details->resolved_library);
dependency_pattern = g_strdup_printf ("only-dependencies:%s:%s:%s",
options, mode, details->resolved_library);
if (!pv_runtime_provide_container_access (self, error))
return FALSE;
temp_bwrap = pv_bwrap_copy (self->container_access_adverb);
flatpak_bwrap_add_args (temp_bwrap,
arch->capsule_capture_libs,
"--container", self->container_access,
"--link-target", "/run/host",
"--dest",
on_host == NULL ? arch->libdir_on_host : on_host,
"--provider", "/",
pattern,
NULL);
flatpak_bwrap_finish (temp_bwrap);
if (!pv_bwrap_run_sync (temp_bwrap, NULL, error))
return FALSE;
g_clear_pointer (&temp_bwrap, flatpak_bwrap_free);
if (on_host != NULL)
{
/* Try to remove the directory we created. If it succeeds, then we
* can optimize slightly by not capturing the dependencies: there's
* no point, because we know we didn't create a symlink to the ICD
* itself. (It must have been nonexistent or for a different ABI.) */
if (g_rmdir (on_host) == 0)
{
details->kinds[multiarch_index] = ICD_KIND_NONEXISTENT;
return TRUE;
}
}
temp_bwrap = pv_bwrap_copy (self->container_access_adverb);
flatpak_bwrap_add_args (temp_bwrap,
arch->capsule_capture_libs,
"--container", self->container_access,
"--link-target", "/run/host",
"--dest", arch->libdir_on_host,
"--provider", "/",
dependency_pattern,
NULL);
flatpak_bwrap_finish (temp_bwrap);
if (!pv_bwrap_run_sync (temp_bwrap, NULL, error))
return FALSE;
g_clear_pointer (&temp_bwrap, flatpak_bwrap_free);
if (details->kinds[multiarch_index] == ICD_KIND_ABSOLUTE)
{
g_assert (on_host != NULL);
details->paths_in_container[multiarch_index] = g_build_filename (arch->libdir_in_container,
subdir,
seq_str ? seq_str : "",
glnx_basename (details->resolved_library),
NULL);
}
return TRUE;
}
static gboolean
bind_runtime (PvRuntime *self,
FlatpakBwrap *bwrap,
GError **error)
{
static const char * const bind_mutable[] =
{
"etc",
"var/cache",
"var/lib"
};
static const char * const dont_bind[] =
{
"/etc/group",
"/etc/passwd",
"/etc/host.conf",
"/etc/hosts",
"/etc/localtime",
"/etc/machine-id",
"/etc/resolv.conf",
"/var/lib/dbus",
"/var/lib/dhcp",
"/var/lib/sudo",
"/var/lib/urandom",
NULL
};
g_autofree gchar *xrd = g_strdup_printf ("/run/user/%ld", (long) geteuid ());
gsize i;
const gchar *member;
g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE);
g_return_val_if_fail (!pv_bwrap_was_finished (bwrap), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
if (!pv_bwrap_bind_usr (bwrap, self->runtime_files, "/", error))
return FALSE;
flatpak_bwrap_add_args (bwrap,
"--setenv", "XDG_RUNTIME_DIR", xrd,
"--tmpfs", "/run",
"--tmpfs", "/tmp",
"--tmpfs", "/var",
"--symlink", "../run", "/var/run",
NULL);
if (!pv_bwrap_bind_usr (bwrap, "/", "/run/host", error))
return FALSE;
for (i = 0; i < G_N_ELEMENTS (bind_mutable); i++)
{
g_autofree gchar *path = g_build_filename (self->runtime_files,
bind_mutable[i],
NULL);
g_autoptr(GDir) dir = NULL;
dir = g_dir_open (path, 0, NULL);
if (dir == NULL)
continue;
for (member = g_dir_read_name (dir);
member != NULL;
member = g_dir_read_name (dir))
{
g_autofree gchar *dest = g_build_filename ("/", bind_mutable[i],
member, NULL);
g_autofree gchar *full = NULL;
g_autofree gchar *target = NULL;
if (g_strv_contains (dont_bind, dest))
continue;
full = g_build_filename (self->runtime_files,
bind_mutable[i],
member,
NULL);
target = glnx_readlinkat_malloc (-1, full, NULL, NULL);
if (target != NULL)
flatpak_bwrap_add_args (bwrap, "--symlink", target, dest, NULL);
else
flatpak_bwrap_add_args (bwrap, "--ro-bind", full, dest, NULL);
}
}
if (g_file_test ("/etc/machine-id", G_FILE_TEST_EXISTS))
{
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/etc/machine-id", "/etc/machine-id",
"--symlink", "/etc/machine-id",
"/var/lib/dbus/machine-id",
NULL);
}
else if (g_file_test ("/var/lib/dbus/machine-id", G_FILE_TEST_EXISTS))
{
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/var/lib/dbus/machine-id",
"/etc/machine-id",
"--symlink", "/etc/machine-id",
"/var/lib/dbus/machine-id",
NULL);
}
if (g_file_test ("/etc/resolv.conf", G_FILE_TEST_EXISTS))
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/etc/resolv.conf", "/etc/resolv.conf",
NULL);
if (g_file_test ("/etc/host.conf", G_FILE_TEST_EXISTS))
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/etc/host.conf", "/etc/host.conf",
NULL);
if (g_file_test ("/etc/hosts", G_FILE_TEST_EXISTS))
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/etc/hosts", "/etc/hosts",
NULL);
/* TODO: Synthesize a passwd with only the user and nobody,
* like Flatpak does? */
if (g_file_test ("/etc/passwd", G_FILE_TEST_EXISTS))
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/etc/passwd", "/etc/passwd",
NULL);
if (g_file_test ("/etc/group", G_FILE_TEST_EXISTS))
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/etc/group", "/etc/group",
NULL);
if (self->flags & PV_RUNTIME_FLAGS_HOST_GRAPHICS_STACK)
{
if (!pv_runtime_use_host_graphics_stack (self, bwrap, error))
return FALSE;
}
/* This needs to be done after pv_runtime_use_host_graphics_stack()
* has decided whether to bring in the host system's libc. */
if (self->flags & PV_RUNTIME_FLAGS_GENERATE_LOCALES)
ensure_locales (self, self->any_libc_from_host, bwrap);
/* These can add data fds to @bwrap, so they must come last - after
* other functions stop using @bwrap as a basis for their own bwrap
* invocations with flatpak_bwrap_append_bwrap().
* Otherwise, when flatpak_bwrap_append_bwrap() calls
* flatpak_bwrap_steal_fds(), it will make the original FlatpakBwrap
* unusable. */
flatpak_run_add_wayland_args (bwrap);
flatpak_run_add_x11_args (bwrap, TRUE);
flatpak_run_add_pulseaudio_args (bwrap);
flatpak_run_add_session_dbus_args (bwrap);
flatpak_run_add_system_dbus_args (bwrap);
pv_bwrap_copy_tree (bwrap, self->overrides, "/overrides");
/* /etc/localtime and /etc/resolv.conf can not exist (or be symlinks to
* non-existing targets), in which case we don't want to attempt to create
* bogus symlinks or bind mounts, as that will cause flatpak run to fail.
*/
if (g_file_test ("/etc/localtime", G_FILE_TEST_EXISTS))
{
g_autofree char *target = NULL;
gboolean is_reachable = FALSE;
g_autofree char *tz = flatpak_get_timezone ();
g_autofree char *timezone_content = g_strdup_printf ("%s\n", tz);
target = glnx_readlinkat_malloc (-1, "/etc/localtime", NULL, NULL);
if (target != NULL)
{
g_autoptr(GFile) base_file = NULL;
g_autoptr(GFile) target_file = NULL;
g_autofree char *target_canonical = NULL;
base_file = g_file_new_for_path ("/etc");
target_file = g_file_resolve_relative_path (base_file, target);
target_canonical = g_file_get_path (target_file);
is_reachable = g_str_has_prefix (target_canonical, "/usr/");
}
if (is_reachable)
{
flatpak_bwrap_add_args (bwrap,
"--symlink", target, "/etc/localtime",
NULL);
}
else
{
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/etc/localtime", "/etc/localtime",
NULL);
}
flatpak_bwrap_add_args_data (bwrap, "timezone",
timezone_content, -1, "/etc/timezone",
NULL);
}
return TRUE;
}
static gboolean
pv_runtime_use_host_graphics_stack (PvRuntime *self,
FlatpakBwrap *bwrap,
GError **error)
{
gsize i, j;
g_autoptr(GString) dri_path = g_string_new ("");
g_autoptr(GString) egl_path = g_string_new ("");
g_autoptr(GString) vulkan_path = g_string_new ("");
g_autoptr(GString) va_api_path = g_string_new ("");
gboolean any_architecture_works = FALSE;
g_autofree gchar *localedef = NULL;
g_autofree gchar *ldconfig = NULL;
g_autofree gchar *locale = NULL;
g_autofree gchar *dir_on_host = NULL;
g_autoptr(SrtSystemInfo) system_info = srt_system_info_new (NULL);
g_autoptr(SrtObjectList) egl_icds = NULL;
g_autoptr(SrtObjectList) vulkan_icds = NULL;
g_autoptr(GPtrArray) egl_icd_details = NULL; /* (element-type IcdDetails) */
g_autoptr(GPtrArray) vulkan_icd_details = NULL; /* (element-type IcdDetails) */
g_autoptr(GPtrArray) va_api_icd_details = NULL; /* (element-type IcdDetails) */
guint n_egl_icds;
guint n_vulkan_icds;
const GList *icd_iter;
gboolean all_libdrm_from_host = TRUE;
g_autoptr(GHashTable) libdrm_data_from_host = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, NULL);
g_autoptr(GHashTable) gconv_from_host = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, NULL);
g_autofree gchar *libdrm_data_in_runtime = NULL;
g_autofree gchar *best_libdrm_data_from_host = NULL;
GHashTableIter iter;
const gchar *gconv_path;
g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE);
g_return_val_if_fail (!pv_bwrap_was_finished (bwrap), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
if (!pv_runtime_provide_container_access (self, error))
return FALSE;
g_debug ("Enumerating EGL ICDs on host system...");
egl_icds = srt_system_info_list_egl_icds (system_info, multiarch_tuples);
n_egl_icds = g_list_length (egl_icds);
egl_icd_details = g_ptr_array_new_full (n_egl_icds,
(GDestroyNotify) G_CALLBACK (icd_details_free));
for (icd_iter = egl_icds, j = 0;
icd_iter != NULL;
icd_iter = icd_iter->next, j++)
{
SrtEglIcd *icd = icd_iter->data;
const gchar *path = srt_egl_icd_get_json_path (icd);
GError *local_error = NULL;
if (!srt_egl_icd_check_error (icd, &local_error))
{
g_debug ("Failed to load EGL ICD #%" G_GSIZE_FORMAT " from %s: %s",
j, path, local_error->message);
g_clear_error (&local_error);
continue;
}
g_debug ("EGL ICD #%" G_GSIZE_FORMAT " at %s: %s",
j, path, srt_egl_icd_get_library_path (icd));
g_ptr_array_add (egl_icd_details, icd_details_new (icd));
}
g_debug ("Enumerating Vulkan ICDs on host system...");
vulkan_icds = srt_system_info_list_vulkan_icds (system_info,
multiarch_tuples);
n_vulkan_icds = g_list_length (vulkan_icds);
vulkan_icd_details = g_ptr_array_new_full (n_vulkan_icds,
(GDestroyNotify) G_CALLBACK (icd_details_free));
for (icd_iter = vulkan_icds, j = 0;
icd_iter != NULL;
icd_iter = icd_iter->next, j++)
{
SrtVulkanIcd *icd = icd_iter->data;
const gchar *path = srt_vulkan_icd_get_json_path (icd);
GError *local_error = NULL;
if (!srt_vulkan_icd_check_error (icd, &local_error))
{
g_debug ("Failed to load Vulkan ICD #%" G_GSIZE_FORMAT " from %s: %s",
j, path, local_error->message);
g_clear_error (&local_error);
continue;
}
g_debug ("Vulkan ICD #%" G_GSIZE_FORMAT " at %s: %s",
j, path, srt_vulkan_icd_get_library_path (icd));
g_ptr_array_add (vulkan_icd_details, icd_details_new (icd));
}
/* We set this FALSE later if we decide not to use the host libc for
* some architecture. */
self->all_libc_from_host = TRUE;
g_assert (multiarch_tuples[G_N_ELEMENTS (multiarch_tuples) - 1] == NULL);
for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++)
{
g_auto (RuntimeArchitecture) arch_on_stack = { i };
RuntimeArchitecture *arch = &arch_on_stack;
g_debug ("Checking for %s libraries...", multiarch_tuples[i]);
if (runtime_architecture_init (arch, self))
{
g_auto(GStrv) dirs = NULL;
g_autoptr(FlatpakBwrap) temp_bwrap = NULL;
g_autofree gchar *this_dri_path_on_host = g_build_filename (arch->libdir_on_host,
"dri", NULL);
g_autofree gchar *this_dri_path_in_container = g_build_filename (arch->libdir_in_container,
"dri", NULL);
g_autofree gchar *libc = NULL;
g_autofree gchar *ld_so_in_runtime = NULL;
g_autofree gchar *libdrm = NULL;
g_autoptr(SrtObjectList) vdpau_drivers = NULL;
g_autoptr(SrtObjectList) va_api_drivers = NULL;
temp_bwrap = flatpak_bwrap_new (NULL);
flatpak_bwrap_add_args (temp_bwrap,
self->bubblewrap,
NULL);
if (!pv_bwrap_bind_usr (temp_bwrap,
self->runtime_files,
"/",
error))
return FALSE;
flatpak_bwrap_add_args (temp_bwrap,
"env", "PATH=/usr/bin:/bin",
"readlink", "-e", arch->ld_so,
NULL);
flatpak_bwrap_finish (temp_bwrap);
ld_so_in_runtime = pv_capture_output ((const char * const *) temp_bwrap->argv->pdata,
NULL);
g_clear_pointer (&temp_bwrap, flatpak_bwrap_free);
if (ld_so_in_runtime == NULL)
{
g_debug ("Container does not have %s so it cannot run "
"%s binaries",
arch->ld_so, arch->tuple);
continue;
}
any_architecture_works = TRUE;
g_debug ("Container path: %s -> %s",
arch->ld_so, ld_so_in_runtime);
pv_search_path_append (dri_path, this_dri_path_in_container);
g_mkdir_with_parents (arch->libdir_on_host, 0755);
g_mkdir_with_parents (this_dri_path_on_host, 0755);
g_debug ("Collecting graphics drivers from host system...");
temp_bwrap = pv_bwrap_copy (self->container_access_adverb);
flatpak_bwrap_add_args (temp_bwrap,
arch->capsule_capture_libs,
"--container", self->container_access,
"--link-target", "/run/host",
"--dest", arch->libdir_on_host,
"--provider", "/",
/* Mesa GLX, etc. */
"gl:",
/* Vulkan */
"if-exists:if-same-abi:soname:libvulkan.so.1",
/* VDPAU */
"if-exists:if-same-abi:soname:libvdpau.so.1",
/* VA-API */
"if-exists:if-same-abi:soname:libva.so.1",
"if-exists:if-same-abi:soname:libva-drm.so.1",
"if-exists:if-same-abi:soname:libva-glx.so.1",
"if-exists:if-same-abi:soname:libva-x11.so.1",
"if-exists:if-same-abi:soname:libva.so.2",
"if-exists:if-same-abi:soname:libva-drm.so.2",
"if-exists:if-same-abi:soname:libva-glx.so.2",
"if-exists:if-same-abi:soname:libva-x11.so.2",
/* NVIDIA proprietary stack */
"if-exists:even-if-older:soname-match:libEGL.so.*",
"if-exists:even-if-older:soname-match:libEGL_nvidia.so.*",
"if-exists:even-if-older:soname-match:libGL.so.*",
"if-exists:even-if-older:soname-match:libGLESv1_CM.so.*",
"if-exists:even-if-older:soname-match:libGLESv1_CM_nvidia.so.*",
"if-exists:even-if-older:soname-match:libGLESv2.so.*",
"if-exists:even-if-older:soname-match:libGLESv2_nvidia.so.*",
"if-exists:even-if-older:soname-match:libGLX.so.*",
"if-exists:even-if-older:soname-match:libGLX_nvidia.so.*",
"if-exists:even-if-older:soname-match:libGLX_indirect.so.*",
"if-exists:even-if-older:soname-match:libGLdispatch.so.*",
"if-exists:even-if-older:soname-match:libOpenGL.so.*",
"if-exists:even-if-older:soname-match:libcuda.so.*",
"if-exists:even-if-older:soname-match:libglx.so.*",
"if-exists:even-if-older:soname-match:libnvidia-cbl.so.*",
"if-exists:even-if-older:soname-match:libnvidia-cfg.so.*",
"if-exists:even-if-older:soname-match:libnvidia-compiler.so.*",
"if-exists:even-if-older:soname-match:libnvidia-egl-wayland.so.*",
"if-exists:even-if-older:soname-match:libnvidia-eglcore.so.*",
"if-exists:even-if-older:soname-match:libnvidia-encode.so.*",
"if-exists:even-if-older:soname-match:libnvidia-fatbinaryloader.so.*",
"if-exists:even-if-older:soname-match:libnvidia-fbc.so.*",
"if-exists:even-if-older:soname-match:libnvidia-glcore.so.*",
"if-exists:even-if-older:soname-match:libnvidia-glsi.so.*",
"if-exists:even-if-older:soname-match:libnvidia-glvkspirv.so.*",
"if-exists:even-if-older:soname-match:libnvidia-ifr.so.*",
"if-exists:even-if-older:soname-match:libnvidia-ml.so.*",
"if-exists:even-if-older:soname-match:libnvidia-opencl.so.*",
"if-exists:even-if-older:soname-match:libnvidia-opticalflow.so.*",
"if-exists:even-if-older:soname-match:libnvidia-ptxjitcompiler.so.*",
"if-exists:even-if-older:soname-match:libnvidia-rtcore.so.*",
"if-exists:even-if-older:soname-match:libnvidia-tls.so.*",
"if-exists:even-if-older:soname-match:libOpenCL.so.*",
"if-exists:even-if-older:soname-match:libvdpau_nvidia.so.*",
NULL);
flatpak_bwrap_finish (temp_bwrap);
if (!pv_bwrap_run_sync (temp_bwrap, NULL, error))
return FALSE;
g_clear_pointer (&temp_bwrap, flatpak_bwrap_free);
g_debug ("Collecting %s EGL drivers from host system...",
arch->tuple);
for (j = 0; j < egl_icd_details->len; j++)
{
IcdDetails *details = g_ptr_array_index (egl_icd_details, j);
SrtEglIcd *icd = SRT_EGL_ICD (details->icd);
if (!srt_egl_icd_check_error (icd, NULL))
continue;
details->resolved_library = srt_egl_icd_resolve_library_path (icd);
g_assert (details->resolved_library != NULL);
if (!bind_icd (self, arch, j, "glvnd", details, error))
return FALSE;
}
g_debug ("Collecting %s Vulkan drivers from host system...",
arch->tuple);
for (j = 0; j < vulkan_icd_details->len; j++)
{
IcdDetails *details = g_ptr_array_index (vulkan_icd_details, j);
SrtVulkanIcd *icd = SRT_VULKAN_ICD (details->icd);
if (!srt_vulkan_icd_check_error (icd, NULL))
continue;
details->resolved_library = srt_vulkan_icd_resolve_library_path (icd);
g_assert (details->resolved_library != NULL);
if (!bind_icd (self, arch, j, "vulkan", details, error))
return FALSE;
}
g_debug ("Enumerating %s VDPAU ICDs on host system...", arch->tuple);
vdpau_drivers = srt_system_info_list_vdpau_drivers (system_info,
arch->tuple,
SRT_DRIVER_FLAGS_NONE);
for (icd_iter = vdpau_drivers; icd_iter != NULL; icd_iter = icd_iter->next)
{
g_autoptr(IcdDetails) details = icd_details_new (icd_iter->data);
details->resolved_library = srt_vdpau_driver_resolve_library_path (details->icd);
g_assert (details->resolved_library != NULL);
g_assert (g_path_is_absolute (details->resolved_library));
/* We avoid using the sequence number for VDPAU because they can only
* be located in a single directory, so by definition we can't have
* collisions */
if (!bind_icd (self, arch, G_MAXSIZE, "vdpau", details, error))
return FALSE;
}
g_debug ("Enumerating %s VA-API drivers on host system...",
arch->tuple);
va_api_drivers = srt_system_info_list_va_api_drivers (system_info,
arch->tuple,
SRT_DRIVER_FLAGS_NONE);
/* Guess that there will be about the same number of VA-API ICDs
* for each word size. This only needs to be approximately right:
* g_ptr_array_add() will resize the allocated buffer if needed. */
if (va_api_icd_details == NULL)
va_api_icd_details = g_ptr_array_new_full (g_list_length (va_api_drivers) * (G_N_ELEMENTS (multiarch_tuples) - 1),
(GDestroyNotify) G_CALLBACK (icd_details_free));
for (icd_iter = va_api_drivers, j = 0; icd_iter != NULL; icd_iter = icd_iter->next, j++)
{
g_autoptr(IcdDetails) details = icd_details_new (icd_iter->data);
details->resolved_library = srt_va_api_driver_resolve_library_path (details->icd);
g_assert (details->resolved_library != NULL);
g_assert (g_path_is_absolute (details->resolved_library));
if (!bind_icd (self, arch, j, "dri", details, error))
return FALSE;
g_ptr_array_add (va_api_icd_details, g_steal_pointer (&details));
}
libc = g_build_filename (arch->libdir_on_host, "libc.so.6", NULL);
/* If we are going to use the host system's libc6 (likely)
* then we have to use its ld.so too. */
if (g_file_test (libc, G_FILE_TEST_IS_SYMLINK))
{
g_autofree gchar *ld_so_in_host = NULL;
g_autofree char *libc_target = NULL;
g_debug ("Making host ld.so visible in container");
ld_so_in_host = realpath (arch->ld_so, NULL);
if (ld_so_in_host == NULL)
return glnx_throw_errno_prefix (error,
"Unable to determine host path to %s",
arch->ld_so);
g_debug ("Host path: %s -> %s", arch->ld_so, ld_so_in_host);
g_debug ("Container path: %s -> %s", arch->ld_so, ld_so_in_runtime);
flatpak_bwrap_add_args (bwrap,
"--ro-bind", ld_so_in_host,
ld_so_in_runtime,
NULL);
/* Collect miscellaneous libraries that libc might dlopen.
* At the moment this is just libidn2. */
g_assert (temp_bwrap == NULL);
temp_bwrap = pv_bwrap_copy (self->container_access_adverb);
flatpak_bwrap_add_args (temp_bwrap,
arch->capsule_capture_libs,
"--container", self->container_access,
"--link-target", "/run/host",
"--dest", arch->libdir_on_host,
"--provider", "/",
"if-exists:libidn2.so.0",
NULL);
flatpak_bwrap_finish (temp_bwrap);
if (!pv_bwrap_run_sync (temp_bwrap, NULL, error))
return FALSE;
g_clear_pointer (&temp_bwrap, flatpak_bwrap_free);
libc_target = glnx_readlinkat_malloc (-1, libc, NULL, NULL);
if (libc_target != NULL)
{
g_autofree gchar *dir = NULL;
g_autofree gchar *gconv_dir_in_host = NULL;
gboolean found = FALSE;
dir = g_path_get_dirname (libc_target);
if (g_str_has_prefix (dir, "/run/host/"))
memmove (dir, dir + strlen ("/run/host"), strlen (dir) - strlen ("/run/host") + 1);
/* We are assuming that in the glibc "Makeconfig", $(libdir) was the same as
* $(slibdir) (this is the upstream default) or the same as "/usr$(slibdir)"
* (like in Debian without the mergerd /usr). We also assume that $(gconvdir)
* had its default value "$(libdir)/gconv". */
gconv_dir_in_host = g_build_filename (dir, "gconv", NULL);
if (g_file_test (gconv_dir_in_host, G_FILE_TEST_IS_DIR))
{
g_hash_table_add (gconv_from_host, g_steal_pointer (&gconv_dir_in_host));
found = TRUE;
}
else if (!g_str_has_prefix (dir, "/usr/"))
{
g_free (gconv_dir_in_host);
gconv_dir_in_host = g_build_filename ("/usr", dir, "gconv", NULL);
if (g_file_test (gconv_dir_in_host, G_FILE_TEST_IS_DIR))
{
g_hash_table_add (gconv_from_host, g_steal_pointer (&gconv_dir_in_host));
found = TRUE;
}
}
if (!found)
{
g_debug ("We were expecting to have the gconv modules directory in the "
"host to be located in \"%s\", but instead it is missing",
gconv_dir_in_host);
}
}
self->any_libc_from_host = TRUE;
}
else
{
self->all_libc_from_host = FALSE;
}
libdrm = g_build_filename (arch->libdir_on_host, "libdrm.so.2", NULL);
/* If we have libdrm.so.2 in overrides we also want to mount
* ${prefix}/share/libdrm from the host. ${prefix} is derived from
* the absolute path of libdrm.so.2 */
if (g_file_test (libdrm, G_FILE_TEST_IS_SYMLINK))
{
g_autofree char *target = NULL;
target = glnx_readlinkat_malloc (-1, libdrm, NULL, NULL);
if (target != NULL)
{
g_autofree gchar *dir = NULL;
g_autofree gchar *lib_multiarch = NULL;
g_autofree gchar *libdrm_dir_in_host = NULL;
dir = g_path_get_dirname (target);
lib_multiarch = g_build_filename ("/lib", arch->tuple, NULL);
if (g_str_has_suffix (dir, lib_multiarch))
dir[strlen (dir) - strlen (lib_multiarch)] = '\0';
else if (g_str_has_suffix (dir, "/lib64"))
dir[strlen (dir) - strlen ("/lib64")] = '\0';
else if (g_str_has_suffix (dir, "/lib32"))
dir[strlen (dir) - strlen ("/lib32")] = '\0';
else if (g_str_has_suffix (dir, "/lib"))
dir[strlen (dir) - strlen ("/lib")] = '\0';
if (g_str_has_prefix (dir, "/run/host"))
memmove (dir, dir + strlen ("/run/host"), strlen (dir) - strlen ("/run/host") + 1);
libdrm_dir_in_host = g_build_filename (dir, "share", "libdrm", NULL);
if (g_file_test (libdrm_dir_in_host, G_FILE_TEST_IS_DIR))
{
g_hash_table_add (libdrm_data_from_host, g_steal_pointer (&libdrm_dir_in_host));
}
else
{
g_debug ("We were expecting to have the libdrm directory in the host "
"to be located in \"%s\", but instead it is missing",
libdrm_dir_in_host);
}
}
}
else
{
/* For at least a single architecture, libdrm is newer in the container */
all_libdrm_from_host = FALSE;
}
/* Order matters: drivers from a later entry will overwrite
* drivers from an earlier entry. Because we don't know whether
* /lib and /usr/lib are 32- or 64-bit, we need to prioritize
* libQUAL higher. Prioritize Debian-style multiarch higher
* still, because it's completely unambiguous. */
dirs = g_new0 (gchar *, 7);
dirs[0] = g_strdup ("/lib");
dirs[1] = g_strdup ("/usr/lib");
dirs[2] = g_build_filename ("/", arch->libqual, NULL);
dirs[3] = g_build_filename ("/usr", arch->libqual, NULL);
dirs[4] = g_build_filename ("/lib", arch->tuple, NULL);
dirs[5] = g_build_filename ("/usr", "lib", arch->tuple, NULL);
for (j = 0; j < 6; j++)
{
if (!try_bind_dri (self, arch, bwrap, dirs[j], error))
return FALSE;
}
}
}
if (!any_architecture_works)
{
GString *archs = g_string_new ("");
g_assert (multiarch_tuples[G_N_ELEMENTS (multiarch_tuples) - 1] == NULL);
for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++)
{
if (archs->len > 0)
g_string_append (archs, ", ");
g_string_append (archs, multiarch_tuples[i]);
}
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"None of the supported CPU architectures are common to "
"the host system and the container (tried: %s)",
archs->str);
g_string_free (archs, TRUE);
return FALSE;
}
if (self->any_libc_from_host && !self->all_libc_from_host)
{
/*
* This shouldn't happen. It would mean that there exist at least
* two architectures (let's say aaa and bbb) for which we have:
* host libc6:aaa < container libc6 < host libc6:bbb
* (we know that the container's libc6:aaa and libc6:bbb are
* constrained to be the same version because that's how multiarch
* works).
*
* If the host system locales work OK with both the aaa and bbb
* versions, let's assume they will also work with the intermediate
* version from the container...
*/
g_warning ("Using glibc from host system for some but not all "
"architectures! Arbitrarily using host locales.");
}
if (self->any_libc_from_host)
{
g_debug ("Making host locale data visible in container");
if (g_file_test ("/usr/lib/locale", G_FILE_TEST_EXISTS))
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/usr/lib/locale",
"/usr/lib/locale",
NULL);
if (g_file_test ("/usr/share/i18n", G_FILE_TEST_EXISTS))
flatpak_bwrap_add_args (bwrap,
"--ro-bind", "/usr/share/i18n",
"/usr/share/i18n",
NULL);
localedef = g_find_program_in_path ("localedef");
if (localedef == NULL)
{
g_warning ("Cannot find localedef in PATH");
}
else
{
g_autofree gchar *target = g_build_filename ("/run/host",
localedef, NULL);
flatpak_bwrap_add_args (bwrap,
"--symlink", target,
"/overrides/bin/localedef",
NULL);
}
locale = g_find_program_in_path ("locale");
if (locale == NULL)
{
g_warning ("Cannot find locale in PATH");
}
else
{
g_autofree gchar *target = g_build_filename ("/run/host",
locale, NULL);
flatpak_bwrap_add_args (bwrap,
"--symlink", target,
"/overrides/bin/locale",
NULL);
}
ldconfig = g_find_program_in_path ("ldconfig");
if (ldconfig == NULL
&& g_file_test ("/sbin/ldconfig", G_FILE_TEST_IS_EXECUTABLE))
ldconfig = g_strdup ("/sbin/ldconfig");
if (ldconfig == NULL
&& g_file_test ("/usr/sbin/ldconfig", G_FILE_TEST_IS_EXECUTABLE))
ldconfig = g_strdup ("/usr/sbin/ldconfig");
if (ldconfig == NULL)
{
g_warning ("Cannot find ldconfig in PATH, /sbin or /usr/sbin");
}
else
{
flatpak_bwrap_add_args (bwrap,
"--ro-bind", ldconfig, "/sbin/ldconfig",
NULL);
}
g_debug ("Making host gconv modules visible in container");
g_hash_table_iter_init (&iter, gconv_from_host);
while (g_hash_table_iter_next (&iter, (gpointer *)&gconv_path, NULL))
{
g_autofree gchar *gconv_in_runtime = NULL;
if (g_str_has_prefix (gconv_path, "/usr/"))
gconv_in_runtime = g_build_filename (self->runtime_usr, gconv_path + strlen ("/usr"), NULL);
else
gconv_in_runtime = g_build_filename (self->runtime_usr, gconv_path, NULL);
if (g_file_test (gconv_in_runtime, G_FILE_TEST_IS_DIR))
{
flatpak_bwrap_add_args (bwrap,
"--ro-bind", gconv_path, gconv_path,
NULL);
}
}
}
else
{
g_debug ("Using included locale data from container");
g_debug ("Using included gconv modules from container");
}
if (g_hash_table_size (libdrm_data_from_host) > 0 && !all_libdrm_from_host)
{
/* See the explanation in the similar "any_libc_from_host && !all_libc_from_host"
* case, above */
g_warning ("Using libdrm.so.2 from host system for some but not all "
"architectures! Will take /usr/share/libdrm from host.");
}
if (g_hash_table_size (libdrm_data_from_host) == 1)
{
best_libdrm_data_from_host = g_strdup (pv_hash_table_get_arbitrary_key (libdrm_data_from_host));
}
else if (g_hash_table_size (libdrm_data_from_host) > 1)
{
g_warning ("Found more than one possible libdrm data directory from host");
/* Prioritize "/usr/share/libdrm" if available. Otherwise randomly pick
* the first directory in the hash table */
if (g_hash_table_contains (libdrm_data_from_host, "/usr/share/libdrm"))
best_libdrm_data_from_host = g_strdup ("/usr/share/libdrm");
else
best_libdrm_data_from_host = g_strdup (pv_hash_table_get_arbitrary_key (libdrm_data_from_host));
}
libdrm_data_in_runtime = g_build_filename (self->runtime_usr, "share", "libdrm", NULL);
if (best_libdrm_data_from_host != NULL &&
g_file_test (libdrm_data_in_runtime, G_FILE_TEST_IS_DIR))
{
flatpak_bwrap_add_args (bwrap,
"--ro-bind", best_libdrm_data_from_host, "/usr/share/libdrm",
NULL);
}
g_debug ("Setting up EGL ICD JSON...");
dir_on_host = g_build_filename (self->overrides,
"share", "glvnd", "egl_vendor.d", NULL);
if (g_mkdir_with_parents (dir_on_host, 0700) != 0)
{
glnx_throw_errno_prefix (error, "Unable to create %s", dir_on_host);
return FALSE;
}
for (j = 0; j < egl_icd_details->len; j++)
{
IcdDetails *details = g_ptr_array_index (egl_icd_details, j);
SrtEglIcd *icd = SRT_EGL_ICD (details->icd);
gboolean need_host_json = FALSE;
if (!srt_egl_icd_check_error (icd, NULL))
continue;
for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++)
{
g_assert (i < G_N_ELEMENTS (details->kinds));
g_assert (i < G_N_ELEMENTS (details->paths_in_container));
if (details->kinds[i] == ICD_KIND_ABSOLUTE)
{
g_autoptr(SrtEglIcd) replacement = NULL;
g_autofree gchar *json_on_host = NULL;
g_autofree gchar *json_in_container = NULL;
g_autofree gchar *json_base = NULL;
g_assert (details->paths_in_container[i] != NULL);
json_base = g_strdup_printf ("%" G_GSIZE_FORMAT "-%s.json",
j, multiarch_tuples[i]);
json_on_host = g_build_filename (dir_on_host, json_base, NULL);
json_in_container = g_build_filename ("/overrides", "share",
"glvnd", "egl_vendor.d",
json_base, NULL);
replacement = srt_egl_icd_new_replace_library_path (icd,
details->paths_in_container[i]);
if (!srt_egl_icd_write_to_file (replacement, json_on_host,
error))
return FALSE;
pv_search_path_append (egl_path, json_in_container);
}
else if (details->kinds[i] == ICD_KIND_SONAME)
{
need_host_json = TRUE;
}
}
if (need_host_json)
{
g_autofree gchar *json_in_container = NULL;
g_autofree gchar *json_base = NULL;
const char *json_on_host = srt_egl_icd_get_json_path (icd);
json_base = g_strdup_printf ("%" G_GSIZE_FORMAT ".json", j);
json_in_container = g_build_filename ("/overrides", "share",
"glvnd", "egl_vendor.d",
json_base, NULL);
flatpak_bwrap_add_args (bwrap,
"--ro-bind", json_on_host, json_in_container,
NULL);
pv_search_path_append (egl_path, json_in_container);
}
}
g_debug ("Setting up Vulkan ICD JSON...");
dir_on_host = g_build_filename (self->overrides,
"share", "vulkan", "icd.d", NULL);
if (g_mkdir_with_parents (dir_on_host, 0700) != 0)
{
glnx_throw_errno_prefix (error, "Unable to create %s", dir_on_host);
return FALSE;
}
for (j = 0; j < vulkan_icd_details->len; j++)
{
IcdDetails *details = g_ptr_array_index (vulkan_icd_details, j);
SrtVulkanIcd *icd = SRT_VULKAN_ICD (details->icd);
gboolean need_host_json = FALSE;
if (!srt_vulkan_icd_check_error (icd, NULL))
continue;
for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++)
{
g_assert (i < G_N_ELEMENTS (details->kinds));
g_assert (i < G_N_ELEMENTS (details->paths_in_container));
if (details->kinds[i] == ICD_KIND_ABSOLUTE)
{
g_autoptr(SrtVulkanIcd) replacement = NULL;
g_autofree gchar *json_on_host = NULL;
g_autofree gchar *json_in_container = NULL;
g_autofree gchar *json_base = NULL;
g_assert (details->paths_in_container[i] != NULL);
json_base = g_strdup_printf ("%" G_GSIZE_FORMAT "-%s.json",
j, multiarch_tuples[i]);
json_on_host = g_build_filename (dir_on_host, json_base, NULL);
json_in_container = g_build_filename ("/overrides", "share",
"vulkan", "icd.d",
json_base, NULL);
replacement = srt_vulkan_icd_new_replace_library_path (icd,
details->paths_in_container[i]);
if (!srt_vulkan_icd_write_to_file (replacement, json_on_host,
error))
return FALSE;
pv_search_path_append (vulkan_path, json_in_container);
}
else if (details->kinds[i] == ICD_KIND_SONAME)
{
need_host_json = TRUE;
}
}
if (need_host_json)
{
g_autofree gchar *json_in_container = NULL;
g_autofree gchar *json_base = NULL;
const char *json_on_host = srt_vulkan_icd_get_json_path (icd);
json_base = g_strdup_printf ("%" G_GSIZE_FORMAT ".json", j);
json_in_container = g_build_filename ("/overrides", "share",
"vulkan", "icd.d",
json_base, NULL);
flatpak_bwrap_add_args (bwrap,
"--ro-bind", json_on_host, json_in_container,
NULL);
pv_search_path_append (vulkan_path, json_in_container);
}
}
for (j = 0; j < va_api_icd_details->len; j++)
{
IcdDetails *details = g_ptr_array_index (va_api_icd_details, j);
for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++)
{
g_assert (i < G_N_ELEMENTS (details->kinds));
g_assert (i < G_N_ELEMENTS (details->paths_in_container));
if (details->kinds[i] == ICD_KIND_NONEXISTENT)
{
continue;
}
else
{
g_autofree gchar *parent = NULL;
g_assert (details->kinds[i] == ICD_KIND_ABSOLUTE);
parent = g_path_get_dirname (details->paths_in_container[i]);
pv_search_path_append (va_api_path, parent);
}
}
}
if (dri_path->len != 0)
flatpak_bwrap_add_args (bwrap,
"--setenv", "LIBGL_DRIVERS_PATH", dri_path->str,
NULL);
else
flatpak_bwrap_add_args (bwrap,
"--unsetenv", "LIBGL_DRIVERS_PATH",
NULL);
if (egl_path->len != 0)
flatpak_bwrap_add_args (bwrap,
"--setenv", "__EGL_VENDOR_LIBRARY_FILENAMES",
egl_path->str, NULL);
else
flatpak_bwrap_add_args (bwrap,
"--unsetenv", "__EGL_VENDOR_LIBRARY_FILENAMES",
NULL);
flatpak_bwrap_add_args (bwrap,
"--unsetenv", "__EGL_VENDOR_LIBRARY_DIRS",
NULL);
if (vulkan_path->len != 0)
flatpak_bwrap_add_args (bwrap,
"--setenv", "VK_ICD_FILENAMES",
vulkan_path->str, NULL);
else
flatpak_bwrap_add_args (bwrap,
"--unsetenv", "VK_ICD_FILENAMES",
NULL);
if (va_api_path->len != 0)
flatpak_bwrap_add_args (bwrap,
"--setenv", "LIBVA_DRIVERS_PATH",
va_api_path->str, NULL);
else
flatpak_bwrap_add_args (bwrap,
"--unsetenv", "LIBVA_DRIVERS_PATH",
NULL);
/* We binded the VDPAU drivers in "%{libdir}/vdpau".
* Unfortunately VDPAU_DRIVER_PATH can hold just a single path, so we can't
* easily list both x86_64 and i386 drivers path.
* As a workaround we set VDPAU_DRIVER_PATH to
* "/overrides/lib/${PLATFORM}-linux-gnu/vdpau". And because we can't control
* the ${PLATFORM} placeholder value we also create symlinks from `i486`, up
* to `i686`, to the library directory `i386` that we expect to have
* already. */
flatpak_bwrap_add_args (bwrap,
"--setenv", "VDPAU_DRIVER_PATH",
"/overrides/lib/${PLATFORM}-linux-gnu/vdpau",
NULL);
static const char * const extra_multiarch_tuples[] =
{
"i486-linux-gnu",
"i586-linux-gnu",
"i686-linux-gnu",
NULL
};
g_autofree gchar *i386_libdir_on_host = g_build_filename (self->overrides, "lib",
"i386-linux-gnu",
NULL);
for (i = 0; i < G_N_ELEMENTS (extra_multiarch_tuples) - 1; i++)
{
g_autofree gchar *extra_libdir_on_host = g_build_filename (self->overrides, "lib",
extra_multiarch_tuples[i],
NULL);
if (!g_file_test (extra_libdir_on_host, G_FILE_TEST_EXISTS) &&
g_file_test (i386_libdir_on_host, G_FILE_TEST_IS_DIR))
{
g_unlink (extra_libdir_on_host);
if (symlink ("i386-linux-gnu", extra_libdir_on_host) != 0)
return glnx_throw_errno_prefix (error,
"Unable to create symlink %s -> i386-linux-gnu",
extra_libdir_on_host);
}
}
return TRUE;
}
gboolean
pv_runtime_bind (PvRuntime *self,
FlatpakBwrap *bwrap,
GError **error)
{
g_autofree gchar *pressure_vessel_prefix = NULL;
g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE);
g_return_val_if_fail (!pv_bwrap_was_finished (bwrap), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
/* Start with just the root tmpfs (which appears automatically)
* and the standard API filesystems */
pv_bwrap_add_api_filesystems (bwrap);
if (!bind_runtime (self, bwrap, error))
return FALSE;
pressure_vessel_prefix = g_path_get_dirname (self->tools_dir);
/* Make sure pressure-vessel itself is visible there. */
flatpak_bwrap_add_args (bwrap,
"--ro-bind",
pressure_vessel_prefix,
"/run/pressure-vessel",
NULL);
pv_runtime_set_search_paths (self, bwrap);
return TRUE;
}
void
pv_runtime_set_search_paths (PvRuntime *self,
FlatpakBwrap *bwrap)
{
g_autoptr(GString) ld_library_path = g_string_new ("");
gsize i;
/* TODO: Adapt the use_ld_so_cache code from Flatpak instead
* of setting LD_LIBRARY_PATH, for better robustness against
* games that set their own LD_LIBRARY_PATH ignoring what they
* got from the environment */
g_assert (multiarch_tuples[G_N_ELEMENTS (multiarch_tuples) - 1] == NULL);
for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++)
{
g_autofree gchar *ld_path = NULL;
ld_path = g_build_filename ("/overrides", "lib",
multiarch_tuples[i], NULL);
pv_search_path_append (ld_library_path, ld_path);
}
/* This would be filtered out by a setuid bwrap, so we have to go
* via --setenv. */
flatpak_bwrap_add_args (bwrap,
/* The PATH from outside the container doesn't
* really make sense inside the container:
* in principle the layout could be totally
* different. */
"--setenv", "PATH", "/overrides/bin:/usr/bin:/bin",
"--setenv", "LD_LIBRARY_PATH",
ld_library_path->str,
NULL);
}
static void
pv_runtime_initable_iface_init (GInitableIface *iface,
gpointer unused G_GNUC_UNUSED)
{
iface->init = pv_runtime_initable_init;
}