forked from flatpak/flatpak
/
flatpak-system-helper.c
2230 lines (1865 loc) · 75.8 KB
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flatpak-system-helper.c
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/*
* Copyright © 2014 Red Hat, Inc
*
* 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/>.
*
* Authors:
* Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <gio/gio.h>
#include <polkit/polkit.h>
#include <sys/mount.h>
#include <gio/gunixmounts.h>
#include "flatpak-dbus-generated.h"
#include "flatpak-dir-private.h"
#include "flatpak-oci-registry-private.h"
#include "flatpak-error.h"
#include "flatpak-utils-private.h"
static PolkitAuthority *authority = NULL;
static FlatpakSystemHelper *helper = NULL;
static GMainLoop *main_loop = NULL;
static guint name_owner_id = 0;
G_LOCK_DEFINE (ongoing_pulls);
static GPtrArray *ongoing_pulls = NULL;
static gboolean on_session_bus = FALSE;
static gboolean no_idle_exit = FALSE;
#define IDLE_TIMEOUT_SECS 10 * 60
#define MAX_PULLS_PER_USER 16
#define MOUNT_TIMEOUT_SECS 15
/* This uses a weird Auto prefix to avoid conflicts with later added polkit types.
*/
typedef PolkitAuthorizationResult AutoPolkitAuthorizationResult;
typedef PolkitDetails AutoPolkitDetails;
typedef PolkitSubject AutoPolkitSubject;
G_DEFINE_AUTOPTR_CLEANUP_FUNC (AutoPolkitAuthorizationResult, g_object_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC (AutoPolkitDetails, g_object_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC (AutoPolkitSubject, g_object_unref)
typedef struct
{
FlatpakSystemHelper *object;
GDBusMethodInvocation *invocation;
GCancellable *cancellable;
guint watch_id;
uid_t uid;
gint ref_count;
gchar *ref;
gchar *commit;
gchar *root_dir_name;
gchar *user_dir_name;
gchar *child_repo_path;
GUnixMountMonitor *mount_monitor;
gulong mount_monitor_id;
guint unsuccessful_mount_timeout_id;
GSubprocess *bindfs;
} OngoingPull;
static void
ongoing_pull_free (OngoingPull *pull)
{
g_autoptr(GFile) root_dir = NULL;
g_autoptr(GFile) user_dir = NULL;
g_autoptr(GError) local_error = NULL;
root_dir = g_file_new_for_path (pull->root_dir_name);
user_dir = g_file_new_for_path (pull->user_dir_name);
g_cancellable_cancel (pull->cancellable);
g_clear_object (&pull->bindfs);
if (!flatpak_rm_rf (root_dir, NULL, &local_error))
{
g_warning ("Unable to remove ongoing pull's root dir at: %s", local_error->message);
g_clear_error (&local_error);
}
if (!flatpak_rm_rf (user_dir, NULL, &local_error))
{
g_warning ("Unable to remove ongoing pull's user dir at: %s", local_error->message);
g_clear_error (&local_error);
}
g_clear_object (&pull->mount_monitor);
g_clear_pointer (&pull->root_dir_name, g_free);
g_clear_pointer (&pull->user_dir_name, g_free);
g_clear_pointer (&pull->child_repo_path, g_free);
g_clear_pointer (&pull->ref, g_free);
g_clear_pointer (&pull->commit, g_free);
g_slice_free (OngoingPull, pull);
}
/* This makes sure that we terminate the bindfs mount which in turn
releases the ref taken by bindfs subprocess wait_check_async. */
static void
ongoing_pull_teardown (OngoingPull *pull)
{
if (pull->watch_id)
g_clear_handle_id (&pull->watch_id, g_bus_unwatch_name);
if (pull->bindfs != NULL)
{
/* We are probably here because bindfs was not terminated during deploy or we are on error
code path and trying to cleanup the mount. Hence, we try force unmount our bindfs directory,
to make sure no open FDs can write to it anymore. If this fails, we kill the subprocess and
try to cleanup /etc/mtab mount entry. */
if (umount2 (pull->user_dir_name, MNT_FORCE) == -1)
{
g_autoptr(GError) local_error = NULL;
glnx_throw_errno_prefix (&local_error, "Failed to unmount bindfs dir %s", pull->user_dir_name);
g_warning ("%s; killing subprocess", local_error->message);
g_clear_error (&local_error);
g_subprocess_force_exit (pull->bindfs);
/* Perform a lazy unmount operation to cleanup the dangling mount entry in /etc/mtab due to SIGKILL. */
if (umount2 (pull->user_dir_name, MNT_DETACH) == -1)
{
glnx_throw_errno_prefix (&local_error, "Failed to umount2 bindfs dir %s", pull->user_dir_name);
g_warning ("%s; mount maybe dangling in /etc/mtab", local_error->message);
}
}
g_clear_object (&pull->bindfs);
}
if (pull->unsuccessful_mount_timeout_id)
g_clear_handle_id (&pull->unsuccessful_mount_timeout_id, g_source_remove);
if (pull->mount_monitor_id)
{
g_signal_handler_disconnect (pull->mount_monitor, pull->mount_monitor_id);
pull->mount_monitor_id = 0;
}
}
static void
ongoing_pull_unref (OngoingPull *pull)
{
g_return_if_fail (pull != NULL);
g_return_if_fail (pull->ref_count > 0);
if (g_atomic_int_dec_and_test (&pull->ref_count))
{
ongoing_pull_teardown (pull);
ongoing_pull_free (pull);
}
}
G_DEFINE_AUTOPTR_CLEANUP_FUNC (OngoingPull, ongoing_pull_unref);
static OngoingPull *
ongoing_pull_ref (OngoingPull *pull)
{
g_return_val_if_fail (pull != NULL, NULL);
g_return_val_if_fail (pull->ref_count > 0, NULL);
g_atomic_int_inc (&pull->ref_count);
return pull;
}
static void
name_vanished_cb (GDBusConnection *connection, const gchar *name, gpointer user_data)
{
OngoingPull *pull = ((OngoingPull *) user_data);
ongoing_pull_teardown (pull);
ongoing_pull_unref (pull);
}
static void
mounts_changed_cb (GUnixMountMonitor *monitor, gpointer user_data)
{
OngoingPull *pull = user_data;
GList *mounts = NULL;
GUnixMountEntry *mount_entry = NULL;
GList *l;
gboolean mount_successful = FALSE;
mounts = g_unix_mounts_get (NULL);
for (l = mounts; l != NULL; l = l->next)
{
mount_entry = (GUnixMountEntry *) l->data;
if (g_strcmp0 (pull->user_dir_name, g_unix_mount_get_mount_path (mount_entry)) == 0)
mount_successful = TRUE;
}
g_list_free_full (mounts, (GDestroyNotify) g_unix_mount_free);
if (mount_successful)
{
g_autofree gchar *basename = NULL;
g_autofree gchar *child_repo_path = NULL;
g_signal_handler_disconnect (monitor, pull->mount_monitor_id);
pull->mount_monitor_id = 0;
basename = g_path_get_basename (pull->child_repo_path);
child_repo_path = g_build_filename (pull->user_dir_name, basename, NULL);
flatpak_system_helper_complete_get_child_repo_for_pull (pull->object,
pull->invocation,
child_repo_path);
g_source_remove (pull->unsuccessful_mount_timeout_id);
pull->unsuccessful_mount_timeout_id = 0;
}
}
static gboolean
unsuccessful_mount_timeout (gpointer user_data)
{
OngoingPull *pull = user_data;
ongoing_pull_teardown (pull);
ongoing_pull_unref (pull);
g_dbus_method_invocation_return_error (pull->invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"Failed to mount %s on %s with bindfs",
pull->user_dir_name, pull->root_dir_name);
return FALSE;
}
static OngoingPull *
ongoing_pull_new (FlatpakSystemHelper *object,
GDBusMethodInvocation *invocation,
const gchar *ref,
const gchar *commit,
uid_t uid,
gchar *user_dir_name,
gchar *root_dir_name,
gchar *child_repo_path)
{
GDBusConnection *connection = g_dbus_method_invocation_get_connection (invocation);
OngoingPull *pull;
pull = g_slice_new0 (OngoingPull);
pull->object = object;
pull->invocation = invocation;
pull->ref = g_strdup (ref);
pull->commit = g_strdup (commit);
pull->cancellable = g_cancellable_new ();
pull->uid = uid;
pull->ref_count = 1;
pull->watch_id = g_bus_watch_name_on_connection (connection,
g_dbus_connection_get_unique_name (connection),
G_BUS_NAME_WATCHER_FLAGS_NONE, NULL,
name_vanished_cb,
pull, NULL);
pull->mount_monitor = g_unix_mount_monitor_get ();
pull->mount_monitor_id = g_signal_connect (pull->mount_monitor,
"mounts-changed",
G_CALLBACK (mounts_changed_cb),
pull);
pull->unsuccessful_mount_timeout_id = g_timeout_add_seconds (MOUNT_TIMEOUT_SECS,
unsuccessful_mount_timeout,
pull);
pull->user_dir_name = g_strdup (user_dir_name);
pull->root_dir_name = g_strdup (root_dir_name);
pull->child_repo_path = g_strdup (child_repo_path);
return pull;
}
static void
skeleton_died_cb (gpointer data)
{
g_debug ("skeleton finalized, exiting");
g_main_loop_quit (main_loop);
}
static gboolean
unref_skeleton_in_timeout_cb (gpointer user_data)
{
static gboolean unreffed = FALSE;
g_debug ("unreffing helper main ref");
if (!unreffed)
{
g_object_unref (helper);
unreffed = TRUE;
}
return G_SOURCE_REMOVE;
}
static void
unref_skeleton_in_timeout (void)
{
if (name_owner_id)
g_bus_unown_name (name_owner_id);
name_owner_id = 0;
/* After we've lost the name or idled we drop the main ref on the helper
so that we'll exit when it drops to zero. However, if there are
outstanding calls these will keep the refcount up during the
execution of them. We do the unref on a timeout to make sure
we're completely draining the queue of (stale) requests. */
g_timeout_add (500, unref_skeleton_in_timeout_cb, NULL);
}
static gboolean
idle_timeout_cb (gpointer user_data)
{
G_LOCK (ongoing_pulls);
guint ongoing_pulls_len = ongoing_pulls->len;
G_UNLOCK (ongoing_pulls);
if (ongoing_pulls_len != 0)
return G_SOURCE_CONTINUE;
if (name_owner_id)
{
g_debug ("Idle - unowning name");
unref_skeleton_in_timeout ();
}
return G_SOURCE_REMOVE;
}
G_LOCK_DEFINE_STATIC (idle);
static void
schedule_idle_callback (void)
{
static guint idle_timeout_id = 0;
G_LOCK (idle);
if (!no_idle_exit)
{
if (idle_timeout_id != 0)
g_source_remove (idle_timeout_id);
idle_timeout_id = g_timeout_add_seconds (IDLE_TIMEOUT_SECS, idle_timeout_cb, NULL);
}
G_UNLOCK (idle);
}
static FlatpakDir *
dir_get_system (const char *installation, GError **error)
{
FlatpakDir *system = NULL;
if (installation != NULL && *installation != '\0')
system = flatpak_dir_get_system_by_id (installation, NULL, error);
else
system = flatpak_dir_get_system_default ();
/* This can happen in case of error with flatpak_dir_get_system_by_id(). */
if (system == NULL)
return NULL;
flatpak_dir_set_no_system_helper (system, TRUE);
return system;
}
static void
no_progress_cb (OstreeAsyncProgress *progress, gpointer user_data)
{
}
#define DBUS_NAME_DBUS "org.freedesktop.DBus"
#define DBUS_INTERFACE_DBUS DBUS_NAME_DBUS
#define DBUS_PATH_DBUS "/org/freedesktop/DBus"
static int
get_sender_pid (GDBusMethodInvocation *invocation)
{
g_autoptr(GDBusMessage) msg = NULL;
g_autoptr(GDBusMessage) reply = NULL;
GDBusConnection *connection;
const char *sender;
GVariant *body;
g_autoptr(GVariantIter) iter = NULL;
const char *key;
GVariant *value;
connection = g_dbus_method_invocation_get_connection (invocation);
sender = g_dbus_method_invocation_get_sender (invocation);
msg = g_dbus_message_new_method_call (DBUS_NAME_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"GetConnectionCredentials");
g_dbus_message_set_body (msg, g_variant_new ("(s)", sender));
reply = g_dbus_connection_send_message_with_reply_sync (connection, msg,
G_DBUS_SEND_MESSAGE_FLAGS_NONE,
30000,
NULL,
NULL,
NULL);
if (reply == NULL)
return 0;
if (g_dbus_message_get_message_type (reply) == G_DBUS_MESSAGE_TYPE_ERROR)
return 0;
body = g_dbus_message_get_body (reply);
g_variant_get (body, "(a{sv})", &iter);
while (g_variant_iter_loop (iter, "{&sv}", &key, &value))
{
if (strcmp (key, "ProcessID") == 0)
return g_variant_get_uint32 (value);
}
return 0;
}
static gboolean
get_connection_uid (GDBusMethodInvocation *invocation, uid_t *uid_out, GError **error)
{
GDBusConnection *connection = g_dbus_method_invocation_get_connection (invocation);
const gchar *sender = g_dbus_method_invocation_get_sender (invocation);
g_autoptr(GVariant) dict = NULL;
g_autoptr(GVariant) unixUserId = NULL;
g_autoptr(GVariant) credentials = NULL;
uid_t uid;
credentials = g_dbus_connection_call_sync (connection,
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
"GetConnectionCredentials",
g_variant_new ("(s)", sender),
G_VARIANT_TYPE ("(a{sv})"), G_DBUS_CALL_FLAGS_NONE, G_MAXINT, NULL, error);
if (credentials == NULL)
return FALSE;
dict = g_variant_get_child_value (credentials, 0);
unixUserId = g_variant_lookup_value (dict, "UnixUserID", G_VARIANT_TYPE_UINT32);
if (unixUserId == NULL)
{
g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"Failed to query UnixUserId for the bus name: %s", sender);
return FALSE;
}
*uid_out = g_variant_get_uint32 (unixUserId);
return TRUE;
}
static guint
get_uid_pull_count (uid_t uid)
{
OngoingPull *pull;
guint uid_pull_count = 0;
G_LOCK (ongoing_pulls);
for (guint i = 0; i < ongoing_pulls->len; i++)
{
pull = g_ptr_array_index (ongoing_pulls, i);
if (pull->uid == uid)
uid_pull_count++;
}
G_UNLOCK (ongoing_pulls);
return uid_pull_count;
}
static void
subprocess_wait_check_cb (GObject *source_object,
GAsyncResult *result,
gpointer user_data)
{
GSubprocess *subprocess = (GSubprocess *) source_object;
g_autoptr(OngoingPull) pull = user_data;
g_autoptr(GError) error = NULL;
if (!g_subprocess_wait_check_finish (subprocess, result, &error))
{
if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
{
g_dbus_method_invocation_return_gerror (pull->invocation, error);
ongoing_pull_teardown (pull);
}
}
}
static gboolean
check_for_repo_containing_partial_pull (GFile *cache_dir, const gchar *commit, gchar **out_repo_location)
{
g_autoptr(GFileEnumerator) enumerator = NULL;
GFileInfo *file_info = NULL;
g_autoptr(GError) error = NULL;
const gchar *name;
enumerator = g_file_enumerate_children (cache_dir,
G_FILE_ATTRIBUTE_STANDARD_NAME,
G_FILE_QUERY_INFO_NONE, NULL, &error);
if (enumerator == NULL)
{
g_warning ("Failed to get file enumerator: %s", error->message);
return FALSE;
}
while (TRUE)
{
if (!g_file_enumerator_iterate (enumerator, &file_info, NULL, NULL, &error))
{
g_warning ("Error while file enumerator iterating: %s", error->message);
break;
}
if (file_info == NULL)
break;
name = g_file_info_get_name (file_info);
if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_DIRECTORY &&
g_str_has_prefix (name, "repo-"))
{
g_autoptr(GFile) repo_file = g_file_get_child (cache_dir, name);
g_autoptr(GFile) state = g_file_get_child (repo_file, "state");
g_autofree gchar *commit_partial_basename = g_strdup_printf ("%s.commitpartial", commit);
g_autoptr(GFile) commit_partial = g_file_get_child (state, commit_partial_basename);
if (g_file_query_exists (commit_partial, NULL))
{
g_autoptr(OstreeRepo) repo = ostree_repo_new (repo_file);
g_autofree gchar *repo_path = g_file_get_path (repo_file);
/* Validate repo before returning */
if (!ostree_repo_open (repo, NULL, &error))
{
g_warning ("Partial pull available at %s, but invalid repo: %s", repo_path, error->message);
return FALSE;
}
else
{
*out_repo_location = g_strdup (repo_path);
return TRUE;
}
}
}
}
return FALSE;
}
static gboolean
check_partial_pull_availability (const gchar *repo_tmp,
const gchar *ref_basename,
const gchar *commit,
gchar **out_location)
{
g_autoptr(GFileEnumerator) enumerator = NULL;
g_autoptr(GFile) repo_tmpfile = NULL;
GFileInfo *file_info = NULL;
g_autofree gchar *prefix = NULL;
g_autoptr(GError) error = NULL;
const gchar *name;
g_debug ("Checking partial pull availability for ref %s (commit: %s)", ref_basename, commit);
repo_tmpfile = g_file_new_for_path (repo_tmp);
enumerator = g_file_enumerate_children (repo_tmpfile,
G_FILE_ATTRIBUTE_STANDARD_NAME,
G_FILE_QUERY_INFO_NONE, NULL, NULL);
if (enumerator == NULL)
{
g_warning ("Failed to get file enumerator: %s", error->message);
return FALSE;
}
prefix = g_strdup_printf ("flatpak-cache-%s", ref_basename);
/* We are looking for flatpak-cache-$ref-XXXXXX directory in repo/tmp.
If we find one, we try to look for an OSTree repo which possibly has
the $commit.commitpartial file denoting the partial pull for that $commit. */
while (TRUE)
{
if (!g_file_enumerator_iterate (enumerator, &file_info, NULL, NULL, &error))
{
g_warning ("Error while file enumerator iterating: %s", error->message);
break;
}
if (file_info == NULL)
break;
name = g_file_info_get_name (file_info);
if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_DIRECTORY &&
g_str_has_prefix (name, prefix))
{
g_autoptr(GFile) cache_dir = g_file_get_child (repo_tmpfile, name);
if (check_for_repo_containing_partial_pull (cache_dir, commit, out_location))
return TRUE;
}
}
return FALSE;
}
static gboolean
handle_get_child_repo_for_pull (FlatpakSystemHelper *object,
GDBusMethodInvocation *invocation,
const gchar *ref,
const gchar *commit,
const gchar *arg_installation)
{
GDBusConnection *connection = g_dbus_method_invocation_get_connection (invocation);
g_autoptr(FlatpakDir) system = NULL;
g_autoptr(GError) error = NULL;
g_autofree gchar *bindfs_path = NULL;
g_debug ("GetChildRepoForPull %s", arg_installation);
system = dir_get_system (arg_installation, &error);
if (system == NULL)
{
g_dbus_method_invocation_return_gerror (invocation, error);
return TRUE;
}
bindfs_path = g_find_program_in_path ("bindfs");
if (bindfs_path == NULL)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_NOT_SUPPORTED,
"Can't find bindfs in the system.");
return TRUE;
}
else
{
OngoingPull *new_pull;
g_autofree gchar *child_repo_path = NULL;
g_autofree gchar *user_dir = NULL;
g_autofree gchar *root_dir = NULL;
g_autofree gchar *flatpak_dir = NULL;
g_autofree gchar *arg_user = NULL;
g_autofree gchar *out_location = NULL;
g_autofree gchar *repo_tmp = NULL;
g_auto(GStrv) parts = NULL;
guint uid_pull_count = 0;
uid_t uid;
if (!get_connection_uid (invocation, &uid, &error))
{
g_dbus_method_invocation_return_gerror (invocation, error);
return TRUE;
}
uid_pull_count = get_uid_pull_count (uid);
if (uid_pull_count > MAX_PULLS_PER_USER)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_LIMITS_EXCEEDED,
"Maximum number of pulls per user exceeded for UID: %u", uid);
return TRUE;
}
flatpak_dir = g_file_get_path (flatpak_dir_get_path (system));
repo_tmp = g_build_filename (flatpak_dir, "repo", "tmp", NULL);
parts = flatpak_decompose_ref (ref, NULL);
if (check_partial_pull_availability (repo_tmp, parts[1], commit, &out_location))
{
g_autoptr(GFile) user_dir_file = NULL;
g_debug ("Found a partial pull for ref %s at: %s", parts[1], out_location);
root_dir = g_path_get_dirname (out_location);
user_dir = g_strdup_printf ("%s-bindfs", root_dir);
user_dir_file = g_file_new_for_path (user_dir);
if (!g_file_query_exists (user_dir_file, NULL))
g_mkdir_with_parents (user_dir, 0755);
child_repo_path = g_steal_pointer (&out_location);
}
else
{
g_autoptr(OstreeRepo) child_repo = NULL;
g_auto(GLnxLockFile) child_repo_lock = { 0, };
g_autoptr(GFile) root_dir_file = NULL;
g_autofree gchar *cache_dir_basename = NULL;
cache_dir_basename = g_strdup_printf ("flatpak-cache-%s-XXXXXX", parts[1]);
root_dir = g_mkdtemp_full (g_build_filename (repo_tmp, cache_dir_basename, NULL), 0755);
user_dir = g_strdup_printf ("%s-bindfs", root_dir);
if (g_mkdir_with_parents (user_dir, 0755) == -1)
{
glnx_throw_errno_prefix (&error, "Can't create directory for bindfs mount at %s", user_dir);
g_dbus_method_invocation_return_gerror (invocation, error);
return TRUE;
}
root_dir_file = g_file_new_for_path (root_dir);
child_repo = flatpak_dir_create_child_repo (system, root_dir_file, &child_repo_lock, NULL, &error);
if (child_repo == NULL)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"Failed to create OSTree child repo at %s", root_dir);
return TRUE;
}
child_repo_path = g_file_get_path (ostree_repo_get_path (child_repo));
}
g_assert (child_repo_path != NULL);
new_pull = ongoing_pull_new (object, invocation, ref, commit,
uid, user_dir, root_dir, child_repo_path);
/* In bindfs, --force-user forces file-ownership to be seen in the mounted mirrored directory(i.e. user_dir),
while --create-for-user enforces the actual owner of the file during file creation on disk. */
arg_user = g_strdup_printf ("--force-user=%"G_GUINT32_FORMAT, uid);
new_pull->bindfs = g_subprocess_new (G_SUBPROCESS_FLAGS_NONE,
&error,
bindfs_path,
arg_user,"-f",
"-o", "nonempty",
"--create-for-user=root",
"--create-for-group=root",
root_dir, user_dir, NULL);
if (new_pull->bindfs == NULL)
{
ongoing_pull_unref (new_pull);
g_dbus_method_invocation_return_gerror (invocation, error);
return TRUE;
}
G_LOCK (ongoing_pulls);
g_ptr_array_add (ongoing_pulls, new_pull);
G_UNLOCK (ongoing_pulls);
g_subprocess_wait_check_async (new_pull->bindfs,
new_pull->cancellable,
subprocess_wait_check_cb,
ongoing_pull_ref (new_pull));
}
return TRUE;
}
static OngoingPull *
take_ongoing_pull_by_dir (const gchar *arg_repo_path)
{
OngoingPull *pull = NULL;
g_autofree gchar *user_dir = g_path_get_dirname (arg_repo_path);
G_LOCK (ongoing_pulls);
for (guint i = 0; i < ongoing_pulls->len; i++)
{
pull = g_ptr_array_index (ongoing_pulls, i);
if (g_strcmp0 (pull->user_dir_name, user_dir) == 0)
break;
}
g_ptr_array_remove (ongoing_pulls, pull);
G_UNLOCK (ongoing_pulls);
return g_steal_pointer (&pull);
}
static gboolean
handle_deploy (FlatpakSystemHelper *object,
GDBusMethodInvocation *invocation,
const gchar *arg_repo_path,
guint32 arg_flags,
const gchar *arg_ref,
const gchar *arg_origin,
const gchar *const *arg_subpaths,
const gchar *arg_installation)
{
g_autoptr(FlatpakDir) system = NULL;
g_autoptr(GFile) repo_file = NULL;
g_autoptr(GError) error = NULL;
g_autoptr(GFile) deploy_dir = NULL;
g_autoptr(OstreeAsyncProgress) ostree_progress = NULL;
gboolean is_update;
gboolean is_oci;
gboolean no_deploy;
gboolean local_pull;
gboolean reinstall;
g_autofree char *url = NULL;
g_autofree gchar *repo_path = NULL;
g_autoptr(OngoingPull) ongoing_pull = NULL;
g_debug ("Deploy %s %u %s %s %s", arg_repo_path, arg_flags, arg_ref, arg_origin, arg_installation);
system = dir_get_system (arg_installation, &error);
if (system == NULL)
{
g_dbus_method_invocation_return_gerror (invocation, error);
return TRUE;
}
ongoing_pull = take_ongoing_pull_by_dir (arg_repo_path);
if (ongoing_pull != NULL)
{
g_autofree gchar *bindfs_repo_path = NULL;
g_autofree gchar *real_repo_path = NULL;
if (umount (ongoing_pull->user_dir_name) == -1)
{
ongoing_pull_teardown (ongoing_pull);
glnx_throw_errno_prefix (&error, "Unmounting %s failed", ongoing_pull->user_dir_name);
g_dbus_method_invocation_return_gerror (invocation, error);
return TRUE;
}
if (ongoing_pull->bindfs)
{
g_subprocess_wait (ongoing_pull->bindfs, NULL, NULL);
g_clear_object (&ongoing_pull->bindfs);
}
bindfs_repo_path = g_path_get_basename (arg_repo_path);
real_repo_path = g_build_filename (ongoing_pull->root_dir_name, bindfs_repo_path, NULL);
repo_file = g_file_new_for_path (real_repo_path);
repo_path = g_steal_pointer (&real_repo_path);
}
if (repo_file == NULL)
{
repo_file = g_file_new_for_path (arg_repo_path);
repo_path = g_strdup (arg_repo_path);
}
g_assert (repo_path != NULL);
flatpak_dir_set_source_pid (system, get_sender_pid (invocation));
if ((arg_flags & ~FLATPAK_HELPER_DEPLOY_FLAGS_ALL) != 0)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS,
"Unsupported flags enabled: 0x%x", (arg_flags & ~FLATPAK_HELPER_DEPLOY_FLAGS_ALL));
return TRUE;
}
if (!g_file_query_exists (repo_file, NULL))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS, "Path does not exist");
return TRUE;
}
is_update = (arg_flags & FLATPAK_HELPER_DEPLOY_FLAGS_UPDATE) != 0;
no_deploy = (arg_flags & FLATPAK_HELPER_DEPLOY_FLAGS_NO_DEPLOY) != 0;
local_pull = (arg_flags & FLATPAK_HELPER_DEPLOY_FLAGS_LOCAL_PULL) != 0;
reinstall = (arg_flags & FLATPAK_HELPER_DEPLOY_FLAGS_REINSTALL) != 0;
deploy_dir = flatpak_dir_get_if_deployed (system, arg_ref, NULL, NULL);
if (deploy_dir)
{
g_autofree char *real_origin = NULL;
if (!is_update)
{
if (!reinstall)
{
/* Can't install already installed app */
g_dbus_method_invocation_return_error (invocation, FLATPAK_ERROR, FLATPAK_ERROR_ALREADY_INSTALLED,
"%s is already installed", arg_ref);
return TRUE;
}
}
else
{
real_origin = flatpak_dir_get_origin (system, arg_ref, NULL, NULL);
if (g_strcmp0 (real_origin, arg_origin) != 0)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS,
"Wrong origin %s for update", arg_origin);
return TRUE;
}
}
}
else if (!deploy_dir && is_update)
{
/* Can't update not installed app */
g_dbus_method_invocation_return_error (invocation, FLATPAK_ERROR, FLATPAK_ERROR_NOT_INSTALLED,
"%s is not installed", arg_ref);
return TRUE;
}
if (!flatpak_dir_ensure_repo (system, NULL, &error))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"Can't open system repo %s", error->message);
return TRUE;
}
is_oci = flatpak_dir_get_remote_oci (system, arg_origin);
if (strlen (repo_path) > 0 && is_oci)
{
g_autoptr(GFile) registry_file = g_file_new_for_path (repo_path);
g_autofree char *registry_uri = g_file_get_uri (registry_file);
g_autoptr(FlatpakOciRegistry) registry = NULL;
g_autoptr(FlatpakOciIndex) index = NULL;
const FlatpakOciManifestDescriptor *desc;
g_autoptr(FlatpakOciVersioned) versioned = NULL;
g_autoptr(FlatpakRemoteState) state = NULL;
FlatpakCollectionRef collection_ref;
g_autoptr(GHashTable) remote_refs = NULL;
g_autofree char *checksum = NULL;
const char *verified_digest;
g_autofree char *upstream_url = NULL;
ostree_repo_remote_get_url (flatpak_dir_get_repo (system),
arg_origin,
&upstream_url,
NULL);
if (upstream_url == NULL)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"Remote %s is disabled", arg_origin);
return TRUE;
}
registry = flatpak_oci_registry_new (registry_uri, FALSE, -1, NULL, &error);
if (registry == NULL)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"Can't open child OCI registry: %s", error->message);
return TRUE;
}
index = flatpak_oci_registry_load_index (registry, NULL, &error);
if (index == NULL)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"Can't open child OCI registry index: %s", error->message);
return TRUE;
}
desc = flatpak_oci_index_get_manifest (index, arg_ref);
if (desc == NULL)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"Can't find ref %s in child OCI registry index", arg_ref);
return TRUE;
}
versioned = flatpak_oci_registry_load_versioned (registry, NULL, desc->parent.digest, NULL,
NULL, &error);
if (versioned == NULL || !FLATPAK_IS_OCI_MANIFEST (versioned))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"Can't open child manifest");
return TRUE;
}
state = flatpak_dir_get_remote_state (system, arg_origin, NULL, &error);
if (state == NULL)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"%s: Can't get remote state: %s", arg_origin, error->message);
return TRUE;
}
/* We need to use list_all_remote_refs because we don't care about
* enumerate vs. noenumerate.
*/
if (!flatpak_dir_list_all_remote_refs (system, state, &remote_refs, NULL, &error))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"%s: Can't list refs: %s", arg_origin, error->message);
return TRUE;
}
collection_ref.collection_id = state->collection_id;
collection_ref.ref_name = (char *) arg_ref;
verified_digest = g_hash_table_lookup (remote_refs, &collection_ref);
if (!verified_digest)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED,
"%s: ref %s not found", arg_origin, arg_ref);
return TRUE;
}
if (!g_str_has_prefix (desc->parent.digest, "sha256:") ||
strcmp (desc->parent.digest + strlen ("sha256:"), verified_digest) != 0)