/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- * * Copyright (C) 2012,2014 Colin Walters * * This library 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 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, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_LIBMOUNT #include #endif #ifdef HAVE_LIBSYSTEMD #include #endif #include "otutil.h" #include "ostree.h" #include "ostree-sysroot-private.h" #include "ostree-sepolicy-private.h" #include "ostree-deployment-private.h" #include "ostree-core-private.h" #include "ostree-linuxfsutil.h" #include "libglnx.h" #ifdef HAVE_LIBSYSTEMD #define OSTREE_VARRELABEL_ID SD_ID128_MAKE(da,67,9b,08,ac,d3,45,04,b7,89,d9,6f,81,8e,a7,81) #define OSTREE_CONFIGMERGE_ID SD_ID128_MAKE(d3,86,3b,ae,c1,3e,44,49,ab,03,84,68,4a,8a,f3,a7) #define OSTREE_DEPLOYMENT_COMPLETE_ID SD_ID128_MAKE(dd,44,0e,3e,54,90,83,b6,3d,0e,fc,7d,c1,52,55,f1) #endif /* * Like symlinkat() but overwrites (atomically) an existing * symlink. */ static gboolean symlink_at_replace (const char *oldpath, int parent_dfd, const char *newpath, GCancellable *cancellable, GError **error) { /* Possibly in the future generate a temporary random name here, * would need to move "generate a temporary name" code into * libglnx or glib? */ g_autofree char *temppath = g_strconcat (newpath, ".tmp", NULL); /* Clean up any stale temporary links */ (void) unlinkat (parent_dfd, temppath, 0); /* Create the temp link */ if (TEMP_FAILURE_RETRY (symlinkat (oldpath, parent_dfd, temppath)) < 0) return glnx_throw_errno_prefix (error, "symlinkat"); /* Rename it into place */ if (!glnx_renameat (parent_dfd, temppath, parent_dfd, newpath, error)) return FALSE; return TRUE; } static GLnxFileCopyFlags sysroot_flags_to_copy_flags (GLnxFileCopyFlags defaults, OstreeSysrootDebugFlags sysrootflags) { if (sysrootflags & OSTREE_SYSROOT_DEBUG_NO_XATTRS) defaults |= GLNX_FILE_COPY_NOXATTRS; return defaults; } /* Try a hardlink if we can, otherwise fall back to copying. Used * right now for kernels/initramfs in /boot, where we can just * hardlink if we're on the same partition. */ static gboolean hardlink_or_copy_at (int src_dfd, const char *src_subpath, int dest_dfd, const char *dest_subpath, OstreeSysrootDebugFlags flags, GCancellable *cancellable, GError **error) { if (linkat (src_dfd, src_subpath, dest_dfd, dest_subpath, 0) != 0) { if (G_IN_SET (errno, EMLINK, EXDEV)) return glnx_file_copy_at (src_dfd, src_subpath, NULL, dest_dfd, dest_subpath, sysroot_flags_to_copy_flags (0, flags), cancellable, error); else return glnx_throw_errno_prefix (error, "linkat(%s)", dest_subpath); } return TRUE; } static gboolean dirfd_copy_attributes_and_xattrs (int src_parent_dfd, const char *src_name, int src_dfd, int dest_dfd, OstreeSysrootDebugFlags flags, GCancellable *cancellable, GError **error) { g_autoptr(GVariant) xattrs = NULL; /* Clone all xattrs first, so we get the SELinux security context * right. This will allow other users access if they have ACLs, but * oh well. */ if (!(flags & OSTREE_SYSROOT_DEBUG_NO_XATTRS)) { if (!glnx_dfd_name_get_all_xattrs (src_parent_dfd, src_name, &xattrs, cancellable, error)) return FALSE; if (!glnx_fd_set_all_xattrs (dest_dfd, xattrs, cancellable, error)) return FALSE; } struct stat src_stbuf; if (!glnx_fstat (src_dfd, &src_stbuf, error)) return FALSE; if (fchown (dest_dfd, src_stbuf.st_uid, src_stbuf.st_gid) != 0) return glnx_throw_errno_prefix (error, "fchown"); if (fchmod (dest_dfd, src_stbuf.st_mode) != 0) return glnx_throw_errno_prefix (error, "fchmod"); return TRUE; } static gboolean copy_dir_recurse (int src_parent_dfd, int dest_parent_dfd, const char *name, OstreeSysrootDebugFlags flags, GCancellable *cancellable, GError **error) { g_auto(GLnxDirFdIterator) src_dfd_iter = { 0, }; glnx_fd_close int dest_dfd = -1; struct dirent *dent; if (!glnx_dirfd_iterator_init_at (src_parent_dfd, name, TRUE, &src_dfd_iter, error)) return FALSE; /* Create with mode 0700, we'll fchmod/fchown later */ if (mkdirat (dest_parent_dfd, name, 0700) != 0) return glnx_throw_errno (error); if (!glnx_opendirat (dest_parent_dfd, name, TRUE, &dest_dfd, error)) return FALSE; if (!dirfd_copy_attributes_and_xattrs (src_parent_dfd, name, src_dfd_iter.fd, dest_dfd, flags, cancellable, error)) return FALSE; while (TRUE) { struct stat child_stbuf; if (!glnx_dirfd_iterator_next_dent (&src_dfd_iter, &dent, cancellable, error)) return FALSE; if (dent == NULL) break; if (!glnx_fstatat (src_dfd_iter.fd, dent->d_name, &child_stbuf, AT_SYMLINK_NOFOLLOW, error)) return FALSE; if (S_ISDIR (child_stbuf.st_mode)) { if (!copy_dir_recurse (src_dfd_iter.fd, dest_dfd, dent->d_name, flags, cancellable, error)) return FALSE; } else { if (!glnx_file_copy_at (src_dfd_iter.fd, dent->d_name, &child_stbuf, dest_dfd, dent->d_name, sysroot_flags_to_copy_flags (GLNX_FILE_COPY_OVERWRITE, flags), cancellable, error)) return FALSE; } } return TRUE; } static gboolean ensure_directory_from_template (int orig_etc_fd, int modified_etc_fd, int new_etc_fd, const char *path, int *out_dfd, OstreeSysrootDebugFlags flags, GCancellable *cancellable, GError **error) { glnx_fd_close int src_dfd = -1; glnx_fd_close int target_dfd = -1; g_assert (path != NULL); g_assert (*path != '/' && *path != '\0'); if (!glnx_opendirat (modified_etc_fd, path, TRUE, &src_dfd, error)) return FALSE; /* Create with mode 0700, we'll fchmod/fchown later */ again: if (mkdirat (new_etc_fd, path, 0700) != 0) { if (errno == EEXIST) { /* Fall through */ } else if (errno == ENOENT) { g_autofree char *parent_path = g_path_get_dirname (path); if (strcmp (parent_path, ".") != 0) { if (!ensure_directory_from_template (orig_etc_fd, modified_etc_fd, new_etc_fd, parent_path, NULL, flags, cancellable, error)) return FALSE; /* Loop */ goto again; } else { /* Fall through...shouldn't happen, but we'll propagate * an error from open. */ } } else return glnx_throw_errno_prefix (error, "mkdirat"); } if (!glnx_opendirat (new_etc_fd, path, TRUE, &target_dfd, error)) return FALSE; if (!dirfd_copy_attributes_and_xattrs (modified_etc_fd, path, src_dfd, target_dfd, flags, cancellable, error)) return FALSE; if (out_dfd) *out_dfd = glnx_steal_fd (&target_dfd); return TRUE; } /** * copy_modified_config_file: * * Copy @file from @modified_etc to @new_etc, overwriting any existing * file there. The @file may refer to a regular file, a symbolic * link, or a directory. Directories will be copied recursively. */ static gboolean copy_modified_config_file (int orig_etc_fd, int modified_etc_fd, int new_etc_fd, const char *path, OstreeSysrootDebugFlags flags, GCancellable *cancellable, GError **error) { struct stat modified_stbuf; struct stat new_stbuf; if (!glnx_fstatat (modified_etc_fd, path, &modified_stbuf, AT_SYMLINK_NOFOLLOW, error)) return glnx_prefix_error (error, "Reading modified config file"); glnx_fd_close int dest_parent_dfd = -1; if (strchr (path, '/') != NULL) { g_autofree char *parent = g_path_get_dirname (path); if (!ensure_directory_from_template (orig_etc_fd, modified_etc_fd, new_etc_fd, parent, &dest_parent_dfd, flags, cancellable, error)) return FALSE; } else { dest_parent_dfd = dup (new_etc_fd); if (dest_parent_dfd == -1) return glnx_throw_errno_prefix (error, "dup"); } g_assert (dest_parent_dfd != -1); if (fstatat (new_etc_fd, path, &new_stbuf, AT_SYMLINK_NOFOLLOW) < 0) { if (errno != ENOENT) return glnx_throw_errno_prefix (error, "fstatat"); } else if (S_ISDIR(new_stbuf.st_mode)) { if (!S_ISDIR(modified_stbuf.st_mode)) { return g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND, "Modified config file newly defaults to directory '%s', cannot merge", path), FALSE; } else { /* Do nothing here - we assume that we've already * recursively copied the parent directory. */ return TRUE; } } else { if (!glnx_unlinkat (new_etc_fd, path, 0, error)) return FALSE; } if (S_ISDIR (modified_stbuf.st_mode)) { if (!copy_dir_recurse (modified_etc_fd, new_etc_fd, path, flags, cancellable, error)) return FALSE; } else if (S_ISLNK (modified_stbuf.st_mode) || S_ISREG (modified_stbuf.st_mode)) { if (!glnx_file_copy_at (modified_etc_fd, path, &modified_stbuf, new_etc_fd, path, sysroot_flags_to_copy_flags (GLNX_FILE_COPY_OVERWRITE, flags), cancellable, error)) return FALSE; } else { return glnx_throw (error, "Unsupported non-regular/non-symlink file in /etc '%s'", path); } return TRUE; } /* * merge_configuration_from: * @sysroot: Sysroot * @merge_deployment: Source of configuration differences * @merge_deployment_dfd: Directory fd, may be -1 * @new_deployment: Target for merge of configuration * @new_deployment_dfd: Directory fd for @new_deployment (may *not* be -1) * @cancellable: Cancellable * @error: Error * * Compute the difference between @merge_deployment's `/usr/etc` and `/etc`, and * apply that to @new_deployment's `/etc`. * * The algorithm for computing the difference is pretty simple; it's * approximately equivalent to "diff -unR orig_etc modified_etc", * except that rather than attempting a 3-way merge if a file is also * changed in @new_etc, the modified version always wins. */ static gboolean merge_configuration_from (OstreeSysroot *sysroot, OstreeDeployment *merge_deployment, int merge_deployment_dfd, OstreeDeployment *new_deployment, int new_deployment_dfd, GCancellable *cancellable, GError **error) { glnx_fd_close int owned_merge_deployment_dfd = -1; const OstreeSysrootDebugFlags flags = sysroot->debug_flags; g_assert (merge_deployment != NULL && new_deployment != NULL); g_assert (new_deployment_dfd != -1); /* Allow the caller to pass -1 for the merge, for convenience */ if (merge_deployment_dfd == -1) { g_autofree char *merge_deployment_path = ostree_sysroot_get_deployment_dirpath (sysroot, merge_deployment); if (!glnx_opendirat (sysroot->sysroot_fd, merge_deployment_path, FALSE, &owned_merge_deployment_dfd, error)) return FALSE; merge_deployment_dfd = owned_merge_deployment_dfd; } /* TODO: get rid of GFile usage here */ g_autoptr(GFile) orig_etc = ot_fdrel_to_gfile (merge_deployment_dfd, "usr/etc"); g_autoptr(GFile) modified_etc = ot_fdrel_to_gfile (merge_deployment_dfd, "etc"); /* Return values for below */ g_autoptr(GPtrArray) modified = g_ptr_array_new_with_free_func ((GDestroyNotify) ostree_diff_item_unref); g_autoptr(GPtrArray) removed = g_ptr_array_new_with_free_func ((GDestroyNotify) g_object_unref); g_autoptr(GPtrArray) added = g_ptr_array_new_with_free_func ((GDestroyNotify) g_object_unref); /* For now, ignore changes to xattrs; the problem is that * security.selinux will be different between the /usr/etc labels * and the ones in the real /etc, so they all show up as different. * * This means that if you want to change the security context of a * file, to have that change persist across upgrades, you must also * modify the content of the file. */ if (!ostree_diff_dirs (OSTREE_DIFF_FLAGS_IGNORE_XATTRS, orig_etc, modified_etc, modified, removed, added, cancellable, error)) return glnx_prefix_error (error, "While computing configuration diff"); { g_autofree char *msg = g_strdup_printf ("Copying /etc changes: %u modified, %u removed, %u added", modified->len, removed->len, added->len); #ifdef HAVE_LIBSYSTEMD sd_journal_send ("MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(OSTREE_CONFIGMERGE_ID), "MESSAGE=%s", msg, "ETC_N_MODIFIED=%u", modified->len, "ETC_N_REMOVED=%u", removed->len, "ETC_N_ADDED=%u", added->len, NULL); #endif _ostree_sysroot_emit_journal_msg (sysroot, msg); } glnx_fd_close int orig_etc_fd = -1; if (!glnx_opendirat (merge_deployment_dfd, "usr/etc", TRUE, &orig_etc_fd, error)) return FALSE; glnx_fd_close int modified_etc_fd = -1; if (!glnx_opendirat (merge_deployment_dfd, "etc", TRUE, &modified_etc_fd, error)) return FALSE; glnx_fd_close int new_etc_fd = -1; if (!glnx_opendirat (new_deployment_dfd, "etc", TRUE, &new_etc_fd, error)) return FALSE; for (guint i = 0; i < removed->len; i++) { GFile *file = removed->pdata[i]; g_autofree char *path = NULL; path = g_file_get_relative_path (orig_etc, file); g_assert (path); if (!glnx_shutil_rm_rf_at (new_etc_fd, path, cancellable, error)) return FALSE; } for (guint i = 0; i < modified->len; i++) { OstreeDiffItem *diff = modified->pdata[i]; g_autofree char *path = g_file_get_relative_path (modified_etc, diff->target); g_assert (path); if (!copy_modified_config_file (orig_etc_fd, modified_etc_fd, new_etc_fd, path, flags, cancellable, error)) return FALSE; } for (guint i = 0; i < added->len; i++) { GFile *file = added->pdata[i]; g_autofree char *path = g_file_get_relative_path (modified_etc, file); g_assert (path); if (!copy_modified_config_file (orig_etc_fd, modified_etc_fd, new_etc_fd, path, flags, cancellable, error)) return FALSE; } return TRUE; } /** * checkout_deployment_tree: * * Look up @revision in the repository, and check it out in * /ostree/deploy/OS/deploy/${treecsum}.${deployserial}. */ static gboolean checkout_deployment_tree (OstreeSysroot *sysroot, OstreeRepo *repo, OstreeDeployment *deployment, int *out_deployment_dfd, GCancellable *cancellable, GError **error) { gboolean ret = FALSE; OstreeRepoCheckoutAtOptions checkout_opts = { 0, }; const char *csum = ostree_deployment_get_csum (deployment); g_autofree char *checkout_target_name = NULL; g_autofree char *osdeploy_path = NULL; glnx_fd_close int osdeploy_dfd = -1; int ret_fd; osdeploy_path = g_strconcat ("ostree/deploy/", ostree_deployment_get_osname (deployment), "/deploy", NULL); checkout_target_name = g_strdup_printf ("%s.%d", csum, ostree_deployment_get_deployserial (deployment)); if (!glnx_shutil_mkdir_p_at (sysroot->sysroot_fd, osdeploy_path, 0775, cancellable, error)) goto out; if (!glnx_opendirat (sysroot->sysroot_fd, osdeploy_path, TRUE, &osdeploy_dfd, error)) goto out; if (!glnx_shutil_rm_rf_at (osdeploy_dfd, checkout_target_name, cancellable, error)) goto out; if (!ostree_repo_checkout_at (repo, &checkout_opts, osdeploy_dfd, checkout_target_name, csum, cancellable, error)) goto out; if (!glnx_opendirat (osdeploy_dfd, checkout_target_name, TRUE, &ret_fd, error)) goto out; ret = TRUE; *out_deployment_dfd = ret_fd; out: return ret; } static char * ptrarray_path_join (GPtrArray *path) { GString *path_buf; path_buf = g_string_new (""); if (path->len == 0) g_string_append_c (path_buf, '/'); else { guint i; for (i = 0; i < path->len; i++) { const char *elt = path->pdata[i]; g_string_append_c (path_buf, '/'); g_string_append (path_buf, elt); } } return g_string_free (path_buf, FALSE); } static gboolean relabel_one_path (OstreeSysroot *sysroot, OstreeSePolicy *sepolicy, GFile *path, GFileInfo *info, GPtrArray *path_parts, GCancellable *cancellable, GError **error) { gboolean ret = FALSE; g_autofree char *relpath = NULL; relpath = ptrarray_path_join (path_parts); if (!ostree_sepolicy_restorecon (sepolicy, relpath, info, path, OSTREE_SEPOLICY_RESTORECON_FLAGS_ALLOW_NOLABEL, NULL, cancellable, error)) goto out; ret = TRUE; out: return ret; } static gboolean relabel_recursively (OstreeSysroot *sysroot, OstreeSePolicy *sepolicy, GFile *dir, GFileInfo *dir_info, GPtrArray *path_parts, GCancellable *cancellable, GError **error) { gboolean ret = FALSE; g_autoptr(GFileEnumerator) direnum = NULL; if (!relabel_one_path (sysroot, sepolicy, dir, dir_info, path_parts, cancellable, error)) goto out; direnum = g_file_enumerate_children (dir, OSTREE_GIO_FAST_QUERYINFO, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, cancellable, error); if (!direnum) goto out; while (TRUE) { GFileInfo *file_info; GFile *child; GFileType ftype; if (!g_file_enumerator_iterate (direnum, &file_info, &child, cancellable, error)) goto out; if (file_info == NULL) break; g_ptr_array_add (path_parts, (char*)g_file_info_get_name (file_info)); ftype = g_file_info_get_file_type (file_info); if (ftype == G_FILE_TYPE_DIRECTORY) { if (!relabel_recursively (sysroot, sepolicy, child, file_info, path_parts, cancellable, error)) goto out; } else { if (!relabel_one_path (sysroot, sepolicy, child, file_info, path_parts, cancellable, error)) goto out; } g_ptr_array_remove_index (path_parts, path_parts->len - 1); } ret = TRUE; out: return ret; } static gboolean selinux_relabel_dir (OstreeSysroot *sysroot, OstreeSePolicy *sepolicy, GFile *dir, const char *prefix, GCancellable *cancellable, GError **error) { gboolean ret = FALSE; g_autoptr(GPtrArray) path_parts = g_ptr_array_new (); g_autoptr(GFileInfo) root_info = NULL; root_info = g_file_query_info (dir, OSTREE_GIO_FAST_QUERYINFO, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, cancellable, error); if (!root_info) goto out; g_ptr_array_add (path_parts, (char*)prefix); if (!relabel_recursively (sysroot, sepolicy, dir, root_info, path_parts, cancellable, error)) { g_prefix_error (error, "Relabeling /%s: ", prefix); goto out; } ret = TRUE; out: return ret; } static gboolean selinux_relabel_var_if_needed (OstreeSysroot *sysroot, OstreeSePolicy *sepolicy, int os_deploy_dfd, GCancellable *cancellable, GError **error) { /* This is a bit of a hack; we should change the code at some * point in the distant future to only create (and label) /var * when doing a deployment. */ const char selabeled[] = "var/.ostree-selabeled"; gboolean deployment_var_labeled; if (!ot_query_exists_at (os_deploy_dfd, selabeled, &deployment_var_labeled, error)) return FALSE; if (!deployment_var_labeled) { { g_autofree char *msg = g_strdup_printf ("Relabeling /var (no stamp file '%s' found)", selabeled); #ifdef HAVE_LIBSYSTEMD sd_journal_send ("MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(OSTREE_VARRELABEL_ID), "MESSAGE=%s", msg, NULL); #endif _ostree_sysroot_emit_journal_msg (sysroot, msg); } g_autoptr(GFile) deployment_var_path = ot_fdrel_to_gfile (os_deploy_dfd, "var"); if (!selinux_relabel_dir (sysroot, sepolicy, deployment_var_path, "var", cancellable, error)) { g_prefix_error (error, "Relabeling /var: "); return FALSE; } { g_auto(OstreeSepolicyFsCreatecon) con = { 0, }; const char *selabeled_abspath = glnx_strjoina ("/", selabeled); if (!_ostree_sepolicy_preparefscreatecon (&con, sepolicy, selabeled_abspath, 0644, error)) return FALSE; if (!glnx_file_replace_contents_at (os_deploy_dfd, selabeled, (guint8*)"", 0, GLNX_FILE_REPLACE_DATASYNC_NEW, cancellable, error)) return FALSE; } } return TRUE; } static gboolean merge_configuration (OstreeSysroot *sysroot, OstreeRepo *repo, OstreeDeployment *previous_deployment, OstreeDeployment *deployment, int deployment_dfd, OstreeSePolicy **out_sepolicy, GCancellable *cancellable, GError **error) { g_autoptr(OstreeSePolicy) sepolicy = NULL; if (previous_deployment) { g_autoptr(GFile) previous_path = NULL; OstreeBootconfigParser *previous_bootconfig; previous_path = ostree_sysroot_get_deployment_directory (sysroot, previous_deployment); previous_bootconfig = ostree_deployment_get_bootconfig (previous_deployment); if (previous_bootconfig) { const char *previous_options = ostree_bootconfig_parser_get (previous_bootconfig, "options"); /* Completely overwrite the previous options here; we will extend * them later. */ ostree_bootconfig_parser_set (ostree_deployment_get_bootconfig (deployment), "options", previous_options); } } gboolean etc_exists = FALSE; if (!ot_query_exists_at (deployment_dfd, "etc", &etc_exists, error)) return FALSE; gboolean usretc_exists = FALSE; if (!ot_query_exists_at (deployment_dfd, "usr/etc", &usretc_exists, error)) return FALSE; if (etc_exists && usretc_exists) return glnx_throw (error, "Tree contains both /etc and /usr/etc"); else if (etc_exists) { /* Compatibility hack */ if (!glnx_renameat (deployment_dfd, "etc", deployment_dfd, "usr/etc", error)) return FALSE; usretc_exists = TRUE; etc_exists = FALSE; } if (usretc_exists) { /* We need copies of /etc from /usr/etc (so admins can use vi), and if * SELinux is enabled, we need to relabel. */ OstreeRepoCheckoutAtOptions etc_co_opts = { .force_copy = TRUE, .subpath = "/usr/etc", .sepolicy_prefix = "/etc"}; /* Here, we initialize SELinux policy from the /usr/etc inside * the root - this is before we've finalized the configuration * merge into /etc. */ sepolicy = ostree_sepolicy_new_at (deployment_dfd, cancellable, error); if (!sepolicy) return FALSE; if (ostree_sepolicy_get_name (sepolicy) != NULL) etc_co_opts.sepolicy = sepolicy; /* Copy usr/etc → etc */ if (!ostree_repo_checkout_at (repo, &etc_co_opts, deployment_dfd, "etc", ostree_deployment_get_csum (deployment), cancellable, error)) return FALSE; } if (previous_deployment) { if (!merge_configuration_from (sysroot, previous_deployment, -1, deployment, deployment_dfd, cancellable, error)) return FALSE; } if (out_sepolicy) *out_sepolicy = g_steal_pointer (&sepolicy); return TRUE; } static gboolean write_origin_file_internal (OstreeSysroot *sysroot, OstreeDeployment *deployment, GKeyFile *new_origin, GLnxFileReplaceFlags flags, GCancellable *cancellable, GError **error) { GKeyFile *origin = new_origin ? new_origin : ostree_deployment_get_origin (deployment); if (origin) { g_autofree char *origin_path = NULL; g_autofree char *contents = NULL; gsize len; origin_path = g_strdup_printf ("ostree/deploy/%s/deploy/%s.%d.origin", ostree_deployment_get_osname (deployment), ostree_deployment_get_csum (deployment), ostree_deployment_get_deployserial (deployment)); contents = g_key_file_to_data (origin, &len, error); if (!contents) return FALSE; if (!glnx_file_replace_contents_at (sysroot->sysroot_fd, origin_path, (guint8*)contents, len, flags, cancellable, error)) return FALSE; } return TRUE; } /** * ostree_sysroot_write_origin_file: * @sysroot: System root * @deployment: Deployment * @new_origin: (allow-none): Origin content * @cancellable: Cancellable * @error: Error * * Immediately replace the origin file of the referenced @deployment * with the contents of @new_origin. If @new_origin is %NULL, * this function will write the current origin of @deployment. */ gboolean ostree_sysroot_write_origin_file (OstreeSysroot *sysroot, OstreeDeployment *deployment, GKeyFile *new_origin, GCancellable *cancellable, GError **error) { return write_origin_file_internal (sysroot, deployment, new_origin, GLNX_FILE_REPLACE_DATASYNC_NEW, cancellable, error); } typedef struct { int boot_dfd; char *kernel_srcpath; char *kernel_namever; char *initramfs_srcpath; char *initramfs_namever; char *bootcsum; } OstreeKernelLayout; static void _ostree_kernel_layout_free (OstreeKernelLayout *layout) { if (layout->boot_dfd != -1) (void) close (layout->boot_dfd); g_free (layout->kernel_srcpath); g_free (layout->kernel_namever); g_free (layout->initramfs_srcpath); g_free (layout->initramfs_namever); g_free (layout->bootcsum); g_free (layout); } G_DEFINE_AUTOPTR_CLEANUP_FUNC(OstreeKernelLayout, _ostree_kernel_layout_free); static OstreeKernelLayout* _ostree_kernel_layout_new (void) { OstreeKernelLayout *ret = g_new0 (OstreeKernelLayout, 1); ret->boot_dfd = -1; return ret; } /* See get_kernel_from_tree() below */ static gboolean get_kernel_from_tree_usrlib_modules (int deployment_dfd, OstreeKernelLayout **out_layout, GCancellable *cancellable, GError **error) { g_autofree char *kver = NULL; /* Look in usr/lib/modules */ g_auto(GLnxDirFdIterator) mod_dfditer = { 0, }; gboolean exists; if (!ot_dfd_iter_init_allow_noent (deployment_dfd, "usr/lib/modules", &mod_dfditer, &exists, error)) return FALSE; if (!exists) { /* No usr/lib/modules? We're done */ *out_layout = NULL; return TRUE; } g_autoptr(OstreeKernelLayout) ret_layout = _ostree_kernel_layout_new (); /* Reusable buffer for path string */ g_autoptr(GString) pathbuf = g_string_new (""); /* Loop until we find something that looks like a valid /usr/lib/modules/$kver */ while (ret_layout->boot_dfd == -1) { struct dirent *dent; struct stat stbuf; if (!glnx_dirfd_iterator_next_dent_ensure_dtype (&mod_dfditer, &dent, cancellable, error)) return FALSE; if (dent == NULL) break; if (dent->d_type != DT_DIR) continue; /* It's a directory, look for /vmlinuz as a regular file */ g_string_truncate (pathbuf, 0); g_string_append_printf (pathbuf, "%s/vmlinuz", dent->d_name); if (fstatat (mod_dfditer.fd, pathbuf->str, &stbuf, 0) < 0) { if (errno != ENOENT) return glnx_throw_errno_prefix (error, "fstatat(%s)", pathbuf->str); else continue; } else { /* Not a regular file? Loop again */ if (!S_ISREG (stbuf.st_mode)) continue; } /* Looks valid, this should exit the loop */ if (!glnx_opendirat (mod_dfditer.fd, dent->d_name, FALSE, &ret_layout->boot_dfd, error)) return FALSE; kver = g_strdup (dent->d_name); ret_layout->kernel_srcpath = g_strdup ("vmlinuz"); ret_layout->kernel_namever = g_strdup_printf ("vmlinuz-%s", kver); } if (ret_layout->boot_dfd == -1) { *out_layout = NULL; /* No kernel found? We're done. */ return TRUE; } /* We found a module directory, compute the checksum */ g_autoptr(GChecksum) checksum = g_checksum_new (G_CHECKSUM_SHA256); glnx_fd_close int fd = -1; /* Checksum the kernel */ if (!glnx_openat_rdonly (ret_layout->boot_dfd, "vmlinuz", TRUE, &fd, error)) return FALSE; g_autoptr(GInputStream) in = g_unix_input_stream_new (fd, FALSE); if (!ot_gio_splice_update_checksum (NULL, in, checksum, cancellable, error)) return FALSE; g_clear_object (&in); (void) close (fd); fd = -1; /* Look for an initramfs, but it's optional */ if (!ot_openat_ignore_enoent (ret_layout->boot_dfd, "initramfs", &fd, error)) return FALSE; if (fd != -1) { ret_layout->initramfs_srcpath = g_strdup ("initramfs"); ret_layout->initramfs_namever = g_strdup_printf ("initramfs-%s", kver); in = g_unix_input_stream_new (fd, FALSE); if (!ot_gio_splice_update_checksum (NULL, in, checksum, cancellable, error)) return FALSE; } ret_layout->bootcsum = g_strdup (g_checksum_get_string (checksum)); *out_layout = g_steal_pointer (&ret_layout); return TRUE; } /* See get_kernel_from_tree() below */ static gboolean get_kernel_from_tree_legacy_layouts (int deployment_dfd, OstreeKernelLayout **out_layout, GCancellable *cancellable, GError **error) { const char *legacy_paths[] = {"usr/lib/ostree-boot", "boot"}; g_autofree char *kernel_checksum = NULL; g_autofree char *initramfs_checksum = NULL; g_autoptr(OstreeKernelLayout) ret_layout = _ostree_kernel_layout_new (); for (guint i = 0; i < G_N_ELEMENTS (legacy_paths); i++) { const char *path = legacy_paths[i]; ret_layout->boot_dfd = glnx_opendirat_with_errno (deployment_dfd, path, TRUE); if (ret_layout->boot_dfd == -1) { if (errno != ENOENT) return glnx_throw_errno_prefix (error, "openat(%s)", path); } else break; } if (ret_layout->boot_dfd == -1) { /* No legacy found? We're done */ *out_layout = NULL; return TRUE; } /* ret_layout->boot_dfd will point to either /usr/lib/ostree-boot or /boot, let's * inspect it. */ g_auto(GLnxDirFdIterator) dfditer = { 0, }; if (!glnx_dirfd_iterator_init_at (ret_layout->boot_dfd, ".", FALSE, &dfditer, error)) return FALSE; while (TRUE) { struct dirent *dent; if (!glnx_dirfd_iterator_next_dent (&dfditer, &dent, cancellable, error)) return FALSE; if (dent == NULL) break; const char *name = dent->d_name; /* See if this is the kernel */ if (ret_layout->kernel_srcpath == NULL && g_str_has_prefix (name, "vmlinuz-")) { const char *dash = strrchr (name, '-'); g_assert (dash); /* In this version, we require that the tree builder generated a * sha256 of the kernel+initramfs and appended it to the file names. */ if (ostree_validate_structureof_checksum_string (dash + 1, NULL)) { kernel_checksum = g_strdup (dash + 1); ret_layout->kernel_srcpath = g_strdup (name); ret_layout->kernel_namever = g_strndup (name, dash - name); } } /* See if this is the initramfs */ else if (ret_layout->initramfs_srcpath == NULL && g_str_has_prefix (name, "initramfs-")) { const char *dash = strrchr (name, '-'); g_assert (dash); if (ostree_validate_structureof_checksum_string (dash + 1, NULL)) { initramfs_checksum = g_strdup (dash + 1); ret_layout->initramfs_srcpath = g_strdup (name); ret_layout->initramfs_namever = g_strndup (name, dash - name); } } /* If we found both a kernel and initramfs, break out of the loop */ if (ret_layout->kernel_srcpath != NULL && ret_layout->initramfs_srcpath != NULL) break; } /* No kernel found? We're done */ if (ret_layout->kernel_srcpath == NULL) { *out_layout = NULL; return TRUE; } /* The kernel/initramfs checksums must be the same */ if (ret_layout->initramfs_srcpath != NULL) { g_assert (kernel_checksum != NULL); g_assert (initramfs_checksum != NULL); if (strcmp (kernel_checksum, initramfs_checksum) != 0) return glnx_throw (error, "Mismatched kernel checksum vs initrd"); ret_layout->bootcsum = g_steal_pointer (&kernel_checksum); } *out_layout = g_steal_pointer (&ret_layout); return TRUE; } /* Locate kernel/initramfs in the tree; the current standard is to look in * /usr/lib/modules/$kver/vmlinuz first. * * Originally OSTree defined kernels to be found underneath /boot * in the tree. But that means when mounting /boot at runtime * we end up masking the content underneath, triggering a warning. * * For that reason, and also consistency with the "/usr defines the OS" model we * later switched to defining the in-tree kernels to be found under * /usr/lib/ostree-boot. But since then, Fedora at least switched to storing the * kernel in /usr/lib/modules, which makes sense and isn't ostree-specific, so * we prefer that now. However, the default Fedora layout doesn't put the * initramfs there, so we need to look in /usr/lib/ostree-boot first. */ static gboolean get_kernel_from_tree (int deployment_dfd, OstreeKernelLayout **out_layout, GCancellable *cancellable, GError **error) { g_autoptr(OstreeKernelLayout) usrlib_modules_layout = NULL; g_autoptr(OstreeKernelLayout) legacy_layout = NULL; /* First, gather from usr/lib/modules/$kver if it exists */ if (!get_kernel_from_tree_usrlib_modules (deployment_dfd, &usrlib_modules_layout, cancellable, error)) return FALSE; /* Gather the legacy layout */ if (!get_kernel_from_tree_legacy_layouts (deployment_dfd, &legacy_layout, cancellable, error)) return FALSE; /* Evaluate the state of both layouts. If there's no legacy layout * If a legacy layout exists, and it has * an initramfs but the module layout doesn't, the legacy layout wins. This is * what happens with rpm-ostree with Fedora today, until rpm-ostree learns the * new layout. */ if (legacy_layout == NULL) { /* No legacy layout, let's see if we have a module layout...*/ if (usrlib_modules_layout == NULL) { /* Both layouts are not found? Throw. */ g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND, "Failed to find kernel in /usr/lib/modules, /usr/lib/ostree-boot or /boot"); return FALSE; } else { /* No legacy, just usr/lib/modules? We're done */ *out_layout = g_steal_pointer (&usrlib_modules_layout); return TRUE; } } else if (usrlib_modules_layout != NULL && usrlib_modules_layout->initramfs_srcpath == NULL && legacy_layout->initramfs_srcpath != NULL) { /* Does the module path not have an initramfs, but the legacy does? Prefer * the latter then, to make rpm-ostree work as is today. */ *out_layout = g_steal_pointer (&legacy_layout); return TRUE; } /* Prefer module layout */ else if (usrlib_modules_layout != NULL) { *out_layout = g_steal_pointer (&usrlib_modules_layout); return TRUE; } else { /* And finally fall back to legacy; we know one exists since we * checked first above. */ g_assert (legacy_layout->kernel_srcpath); *out_layout = g_steal_pointer (&legacy_layout); return TRUE; } } /* We used to syncfs(), but that doesn't flush the journal on XFS, * and since GRUB2 can't read the XFS journal, the system * could fail to boot. * * http://marc.info/?l=linux-fsdevel&m=149520244919284&w=2 * https://github.com/ostreedev/ostree/pull/1049 */ static gboolean fsfreeze_thaw_cycle (OstreeSysroot *self, int rootfs_dfd, GCancellable *cancellable, GError **error) { GLNX_AUTO_PREFIX_ERROR ("During fsfreeze-thaw", error); int sockpair[2]; if (socketpair (AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0, sockpair) < 0) return glnx_throw_errno_prefix (error, "socketpair"); glnx_fd_close int sock_parent = sockpair[0]; glnx_fd_close int sock_watchdog = sockpair[1]; pid_t pid = fork (); if (pid < 0) return glnx_throw_errno_prefix (error, "fork"); const gboolean debug_fifreeze = (self->debug_flags & OSTREE_SYSROOT_DEBUG_TEST_FIFREEZE)>0; char c = '!'; if (pid == 0) /* Child watchdog/unfreezer process. */ { (void) close (glnx_steal_fd (&sock_parent)); /* Daemonize, and mask SIGINT/SIGTERM, so we're likely to survive e.g. * someone doing a `systemctl restart rpm-ostreed` or a Ctrl-C of * `ostree admin upgrade`. We don't daemonize though if testing so * that we can waitpid(). */ if (!debug_fifreeze) { if (daemon (0, 0) < 0) err (1, "daemon"); } int sigs[] = { SIGINT, SIGTERM }; for (guint i = 0; i < G_N_ELEMENTS (sigs); i++) { if (signal (sigs[i], SIG_IGN) == SIG_ERR) err (1, "signal"); } /* Tell the parent we're ready */ if (write (sock_watchdog, &c, sizeof (c)) != 1) err (1, "write"); /* Wait for the parent to say it's going to freeze. */ ssize_t bytes_read = TEMP_FAILURE_RETRY (read (sock_watchdog, &c, sizeof (c))); if (bytes_read < 0) err (1, "read"); if (bytes_read != 1) errx (1, "failed to read from parent"); /* Now we wait for the second message from the parent saying the freeze is * complete. We have a 30 second timeout; if somehow the parent hasn't * signaled completion, go ahead and unfreeze. But for debugging, just 1 * second to avoid exessively lengthining the test suite. */ const int timeout_ms = debug_fifreeze ? 1000 : 30000; struct pollfd pfds[1]; pfds[0].fd = sock_watchdog; pfds[0].events = POLLIN | POLLHUP; int r = TEMP_FAILURE_RETRY (poll (pfds, 1, timeout_ms)); /* Do a thaw if we hit an error, or if the poll timed out */ if (r <= 0) { /* Ignore errors: * EINVAL: Not frozen * EPERM: For running the test suite as non-root * EOPNOTSUPP: If the filesystem doesn't support it */ int saved_errno = errno; (void) TEMP_FAILURE_RETRY (ioctl (rootfs_dfd, FITHAW, 0)); errno = saved_errno; /* But if we got an error from poll, let's log it */ if (r < 0) err (1, "poll"); } if (debug_fifreeze) g_printerr ("fifreeze watchdog was run\n"); exit (EXIT_SUCCESS); } else /* Parent process. */ { (void) close (glnx_steal_fd (&sock_watchdog)); /* Wait for the watchdog to say it's set up; mainly that it's * masked SIGTERM successfully. */ ssize_t bytes_read = TEMP_FAILURE_RETRY (read (sock_parent, &c, sizeof (c))); if (bytes_read < 0) return glnx_throw_errno_prefix (error, "read(watchdog init)"); if (bytes_read != 1) return glnx_throw (error, "read(watchdog init)"); /* And tell the watchdog that we're ready to start */ if (write (sock_parent, &c, sizeof (c)) != sizeof (c)) return glnx_throw_errno_prefix (error, "write(watchdog start)"); /* Testing infrastructure */ if (debug_fifreeze) { int wstatus; /* Ensure the child has written its data */ if (TEMP_FAILURE_RETRY (waitpid (pid, &wstatus, 0)) < 0) return glnx_throw_errno_prefix (error, "waitpid(test-fifreeze)"); if (!g_spawn_check_exit_status (wstatus, error)) return glnx_prefix_error (error, "test-fifreeze: "); return glnx_throw (error, "aborting due to test-fifreeze"); } /* Do a freeze/thaw cycle; TODO add a FIFREEZETHAW ioctl */ if (ioctl (rootfs_dfd, FIFREEZE, 0) != 0) { /* Not supported, or we're running in the unit tests (as non-root)? * OK, let's just do a syncfs. */ if (G_IN_SET (errno, EOPNOTSUPP, EPERM)) { if (TEMP_FAILURE_RETRY (syncfs (rootfs_dfd)) != 0) return glnx_throw_errno_prefix (error, "syncfs"); /* Write the completion, and return */ if (write (sock_parent, &c, sizeof (c)) != sizeof (c)) return glnx_throw_errno_prefix (error, "write(watchdog syncfs complete)"); return TRUE; } else return glnx_throw_errno_prefix (error, "ioctl(FIFREEZE)"); } /* And finally thaw, then signal our completion to the watchdog */ if (TEMP_FAILURE_RETRY (ioctl (rootfs_dfd, FITHAW, 0)) != 0) return glnx_throw_errno_prefix (error, "ioctl(FITHAW)"); if (write (sock_parent, &c, sizeof (c)) != sizeof (c)) return glnx_throw_errno_prefix (error, "write(watchdog FITHAW complete)"); } return TRUE; } typedef struct { guint64 root_syncfs_msec; guint64 boot_syncfs_msec; guint64 extra_syncfs_msec; } SyncStats; /* First, sync the root directory as well as /var and /boot which may * be separate mount points. Then *in addition*, do a global * `sync()`. */ static gboolean full_system_sync (OstreeSysroot *self, SyncStats *out_stats, GCancellable *cancellable, GError **error) { guint64 start_msec = g_get_monotonic_time () / 1000; if (syncfs (self->sysroot_fd) != 0) return glnx_throw_errno_prefix (error, "syncfs(sysroot)"); guint64 end_msec = g_get_monotonic_time () / 1000; out_stats->root_syncfs_msec = (end_msec - start_msec); start_msec = g_get_monotonic_time () / 1000; glnx_fd_close int boot_dfd = -1; if (!glnx_opendirat (self->sysroot_fd, "boot", TRUE, &boot_dfd, error)) return FALSE; if (!fsfreeze_thaw_cycle (self, boot_dfd, cancellable, error)) return FALSE; end_msec = g_get_monotonic_time () / 1000; out_stats->boot_syncfs_msec = (end_msec - start_msec); /* And now out of an excess of conservativism, we still invoke * sync(). The advantage of still using `syncfs()` above is that we * actually get error codes out of that API, and we more clearly * delineate what we actually want to sync in the future when this * global sync call is removed. */ start_msec = g_get_monotonic_time () / 1000; sync (); end_msec = g_get_monotonic_time () / 1000; out_stats->extra_syncfs_msec = (end_msec - start_msec); return TRUE; } static gboolean create_new_bootlinks (OstreeSysroot *self, int bootversion, GPtrArray *new_deployments, GCancellable *cancellable, GError **error) { glnx_fd_close int ostree_dfd = -1; if (!glnx_opendirat (self->sysroot_fd, "ostree", TRUE, &ostree_dfd, error)) return FALSE; int old_subbootversion; if (bootversion != self->bootversion) { if (!_ostree_sysroot_read_current_subbootversion (self, bootversion, &old_subbootversion, cancellable, error)) return FALSE; } else old_subbootversion = self->subbootversion; int new_subbootversion = old_subbootversion == 0 ? 1 : 0; /* Create the "subbootdir", which is a directory holding a symlink farm pointing to * deployments per-osname. */ g_autofree char *ostree_subbootdir_name = g_strdup_printf ("boot.%d.%d", bootversion, new_subbootversion); if (!glnx_shutil_rm_rf_at (ostree_dfd, ostree_subbootdir_name, cancellable, error)) return FALSE; if (!glnx_shutil_mkdir_p_at (ostree_dfd, ostree_subbootdir_name, 0755, cancellable, error)) return FALSE; glnx_fd_close int ostree_subbootdir_dfd = -1; if (!glnx_opendirat (ostree_dfd, ostree_subbootdir_name, FALSE, &ostree_subbootdir_dfd, error)) return FALSE; for (guint i = 0; i < new_deployments->len; i++) { OstreeDeployment *deployment = new_deployments->pdata[i]; g_autofree char *bootlink_parent = g_strconcat (ostree_deployment_get_osname (deployment), "/", ostree_deployment_get_bootcsum (deployment), NULL); g_autofree char *bootlink_pathname = g_strdup_printf ("%s/%d", bootlink_parent, ostree_deployment_get_bootserial (deployment)); g_autofree char *bootlink_target = g_strdup_printf ("../../../deploy/%s/deploy/%s.%d", ostree_deployment_get_osname (deployment), ostree_deployment_get_csum (deployment), ostree_deployment_get_deployserial (deployment)); if (!glnx_shutil_mkdir_p_at (ostree_subbootdir_dfd, bootlink_parent, 0755, cancellable, error)) return FALSE; if (!symlink_at_replace (bootlink_target, ostree_subbootdir_dfd, bootlink_pathname, cancellable, error)) return FALSE; } return TRUE; } static gboolean swap_bootlinks (OstreeSysroot *self, int bootversion, GPtrArray *new_deployments, GCancellable *cancellable, GError **error) { glnx_fd_close int ostree_dfd = -1; if (!glnx_opendirat (self->sysroot_fd, "ostree", TRUE, &ostree_dfd, error)) return FALSE; int old_subbootversion; if (bootversion != self->bootversion) { if (!_ostree_sysroot_read_current_subbootversion (self, bootversion, &old_subbootversion, cancellable, error)) return FALSE; } else old_subbootversion = self->subbootversion; int new_subbootversion = old_subbootversion == 0 ? 1 : 0; g_autofree char *ostree_bootdir_name = g_strdup_printf ("boot.%d", bootversion); g_autofree char *ostree_subbootdir_name = g_strdup_printf ("boot.%d.%d", bootversion, new_subbootversion); if (!symlink_at_replace (ostree_subbootdir_name, ostree_dfd, ostree_bootdir_name, cancellable, error)) return FALSE; return TRUE; } static GHashTable * parse_os_release (const char *contents, const char *split) { g_autofree char **lines = g_strsplit (contents, split, -1); GHashTable *ret = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free); for (char **iter = lines; *iter; iter++) { g_autofree char *line = *iter; if (g_str_has_prefix (line, "#")) continue; char *eq = strchr (line, '='); if (!eq) continue; *eq = '\0'; const char *quotedval = eq + 1; char *val = g_shell_unquote (quotedval, NULL); if (!val) continue; g_hash_table_insert (ret, g_steal_pointer (&line), val); } return ret; } /* * install_deployment_kernel: * * Write out an entry in /boot/loader/entries for @deployment. */ static gboolean install_deployment_kernel (OstreeSysroot *sysroot, OstreeRepo *repo, int new_bootversion, OstreeDeployment *deployment, guint n_deployments, gboolean show_osname, GCancellable *cancellable, GError **error) { OstreeBootconfigParser *bootconfig = ostree_deployment_get_bootconfig (deployment); g_autofree char *deployment_dirpath = ostree_sysroot_get_deployment_dirpath (sysroot, deployment); glnx_fd_close int deployment_dfd = -1; if (!glnx_opendirat (sysroot->sysroot_fd, deployment_dirpath, FALSE, &deployment_dfd, error)) return FALSE; /* Find the kernel/initramfs in the tree */ g_autoptr(OstreeKernelLayout) kernel_layout = NULL; if (!get_kernel_from_tree (deployment_dfd, &kernel_layout, cancellable, error)) return FALSE; glnx_fd_close int boot_dfd = -1; if (!glnx_opendirat (sysroot->sysroot_fd, "boot", TRUE, &boot_dfd, error)) return FALSE; const char *osname = ostree_deployment_get_osname (deployment); const char *bootcsum = ostree_deployment_get_bootcsum (deployment); g_assert_cmpstr (kernel_layout->bootcsum, ==, bootcsum); g_autofree char *bootcsumdir = g_strdup_printf ("ostree/%s-%s", osname, bootcsum); g_autofree char *bootconfdir = g_strdup_printf ("loader.%d/entries", new_bootversion); g_autofree char *bootconf_name = g_strdup_printf ("ostree-%s-%d.conf", osname, ostree_deployment_get_index (deployment)); if (!glnx_shutil_mkdir_p_at (boot_dfd, bootcsumdir, 0775, cancellable, error)) return FALSE; glnx_fd_close int bootcsum_dfd = -1; if (!glnx_opendirat (boot_dfd, bootcsumdir, TRUE, &bootcsum_dfd, error)) return FALSE; if (!glnx_shutil_mkdir_p_at (boot_dfd, bootconfdir, 0775, cancellable, error)) return FALSE; /* Install (hardlink/copy) the kernel into /boot/ostree/osname-${bootcsum} if * it doesn't exist already. */ struct stat stbuf; if (fstatat (bootcsum_dfd, kernel_layout->kernel_namever, &stbuf, 0) != 0) { if (errno != ENOENT) return glnx_throw_errno_prefix (error, "fstat %s", kernel_layout->kernel_namever); if (!hardlink_or_copy_at (kernel_layout->boot_dfd, kernel_layout->kernel_srcpath, bootcsum_dfd, kernel_layout->kernel_namever, sysroot->debug_flags, cancellable, error)) return FALSE; } /* If we have an initramfs, then install it into * /boot/ostree/osname-${bootcsum} if it doesn't exist already. */ if (kernel_layout->initramfs_srcpath) { g_assert (kernel_layout->initramfs_namever); if (fstatat (bootcsum_dfd, kernel_layout->initramfs_namever, &stbuf, 0) != 0) { if (errno != ENOENT) return glnx_throw_errno_prefix (error, "fstat %s", kernel_layout->initramfs_namever); if (!hardlink_or_copy_at (kernel_layout->boot_dfd, kernel_layout->initramfs_srcpath, bootcsum_dfd, kernel_layout->initramfs_namever, sysroot->debug_flags, cancellable, error)) return FALSE; } } g_autofree char *contents = NULL; if (fstatat (deployment_dfd, "usr/lib/os-release", &stbuf, 0) != 0) { if (errno != ENOENT) { return glnx_throw_errno (error); } else { contents = glnx_file_get_contents_utf8_at (deployment_dfd, "etc/os-release", NULL, cancellable, error); if (!contents) return glnx_prefix_error (error, "Reading /etc/os-release"); } } else { contents = glnx_file_get_contents_utf8_at (deployment_dfd, "usr/lib/os-release", NULL, cancellable, error); if (!contents) return glnx_prefix_error (error, "Reading /usr/lib/os-release"); } g_autoptr(GHashTable) osrelease_values = parse_os_release (contents, "\n"); /* title */ const char *val = g_hash_table_lookup (osrelease_values, "PRETTY_NAME"); if (val == NULL) val = g_hash_table_lookup (osrelease_values, "ID"); if (val == NULL) return glnx_throw (error, "No PRETTY_NAME or ID in /etc/os-release"); g_autofree char *deployment_version = NULL; if (repo) { /* Try extracting a version for this deployment. */ const char *csum = ostree_deployment_get_csum (deployment); g_autoptr(GVariant) variant = NULL; g_autoptr(GVariant) metadata = NULL; /* XXX Copying ot_admin_checksum_version() + bits from * ot-admin-builtin-status.c. Maybe this should be * public API in libostree? */ if (ostree_repo_load_variant (repo, OSTREE_OBJECT_TYPE_COMMIT, csum, &variant, NULL)) { metadata = g_variant_get_child_value (variant, 0); g_variant_lookup (metadata, OSTREE_COMMIT_META_KEY_VERSION, "s", &deployment_version); } } /* XXX The SYSLINUX bootloader backend actually parses the title string * (specifically, it looks for the substring "(ostree"), so further * changes to the title format may require updating that backend. */ g_autoptr(GString) title_key = g_string_new (val); if (deployment_version && *deployment_version) { g_string_append_c (title_key, ' '); g_string_append (title_key, deployment_version); } g_string_append (title_key, " (ostree"); if (show_osname) { g_string_append_c (title_key, ':'); g_string_append (title_key, osname); } if (!(deployment_version && *deployment_version)) { g_string_append_printf (title_key, ":%d", ostree_deployment_get_index (deployment)); } g_string_append_c (title_key, ')'); ostree_bootconfig_parser_set (bootconfig, "title", title_key->str); g_autofree char *version_key = g_strdup_printf ("%d", n_deployments - ostree_deployment_get_index (deployment)); ostree_bootconfig_parser_set (bootconfig, OSTREE_COMMIT_META_KEY_VERSION, version_key); g_autofree char * boot_relpath = g_strconcat ("/", bootcsumdir, "/", kernel_layout->kernel_namever, NULL); ostree_bootconfig_parser_set (bootconfig, "linux", boot_relpath); if (kernel_layout->initramfs_namever) { g_autofree char * boot_relpath = g_strconcat ("/", bootcsumdir, "/", kernel_layout->initramfs_namever, NULL); ostree_bootconfig_parser_set (bootconfig, "initrd", boot_relpath); } val = ostree_bootconfig_parser_get (bootconfig, "options"); /* Note this is parsed in ostree-impl-system-generator.c */ g_autofree char *ostree_kernel_arg = g_strdup_printf ("ostree=/ostree/boot.%d/%s/%s/%d", new_bootversion, osname, bootcsum, ostree_deployment_get_bootserial (deployment)); __attribute__((cleanup(_ostree_kernel_args_cleanup))) OstreeKernelArgs *kargs = _ostree_kernel_args_from_string (val); _ostree_kernel_args_replace_take (kargs, ostree_kernel_arg); ostree_kernel_arg = NULL; g_autofree char *options_key = _ostree_kernel_args_to_string (kargs); ostree_bootconfig_parser_set (bootconfig, "options", options_key); glnx_fd_close int bootconf_dfd = -1; if (!glnx_opendirat (boot_dfd, bootconfdir, TRUE, &bootconf_dfd, error)) return FALSE; if (!ostree_bootconfig_parser_write_at (ostree_deployment_get_bootconfig (deployment), bootconf_dfd, bootconf_name, cancellable, error)) return FALSE; return TRUE; } static gboolean prepare_new_bootloader_link (OstreeSysroot *sysroot, int current_bootversion, int new_bootversion, GCancellable *cancellable, GError **error) { g_assert ((current_bootversion == 0 && new_bootversion == 1) || (current_bootversion == 1 && new_bootversion == 0)); g_autofree char *new_target = g_strdup_printf ("loader.%d", new_bootversion); /* We shouldn't actually need to replace but it's easier to reuse that code */ if (!symlink_at_replace (new_target, sysroot->sysroot_fd, "boot/loader.tmp", cancellable, error)) return FALSE; return TRUE; } static gboolean swap_bootloader (OstreeSysroot *sysroot, int current_bootversion, int new_bootversion, GCancellable *cancellable, GError **error) { glnx_fd_close int boot_dfd = -1; g_assert ((current_bootversion == 0 && new_bootversion == 1) || (current_bootversion == 1 && new_bootversion == 0)); if (!glnx_opendirat (sysroot->sysroot_fd, "boot", TRUE, &boot_dfd, error)) return FALSE; /* The symlink was already written, and we used syncfs() to ensure * its data is in place. Renaming now should give us atomic semantics; * see https://bugzilla.gnome.org/show_bug.cgi?id=755595 */ if (!glnx_renameat (boot_dfd, "loader.tmp", boot_dfd, "loader", error)) return FALSE; /* Now we explicitly fsync this directory, even though it * isn't required for atomicity, for two reasons: * - It should be very cheap as we're just syncing whatever * data was written since the last sync which was hopefully * less than a second ago. * - It should be sync'd before shutdown as that could crash * for whatever reason, and we wouldn't want to confuse the * admin by going back to the previous session. */ if (fsync (boot_dfd) != 0) return glnx_throw_errno_prefix (error, "fsync(boot)"); return TRUE; } static GHashTable * assign_bootserials (GPtrArray *deployments) { guint i; GHashTable *ret = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, NULL); for (i = 0; i < deployments->len; i++) { OstreeDeployment *deployment = deployments->pdata[i]; const char *bootcsum = ostree_deployment_get_bootcsum (deployment); guint count; count = GPOINTER_TO_UINT (g_hash_table_lookup (ret, bootcsum)); g_hash_table_replace (ret, (char*) bootcsum, GUINT_TO_POINTER (count + 1)); ostree_deployment_set_bootserial (deployment, count); } return ret; } static gboolean deployment_bootconfigs_equal (OstreeDeployment *a, OstreeDeployment *b) { const char *a_bootcsum = ostree_deployment_get_bootcsum (a); const char *b_bootcsum = ostree_deployment_get_bootcsum (b); if (strcmp (a_bootcsum, b_bootcsum) != 0) return FALSE; { OstreeBootconfigParser *a_bootconfig = ostree_deployment_get_bootconfig (a); OstreeBootconfigParser *b_bootconfig = ostree_deployment_get_bootconfig (b); const char *a_boot_options = ostree_bootconfig_parser_get (a_bootconfig, "options"); const char *b_boot_options = ostree_bootconfig_parser_get (b_bootconfig, "options"); __attribute__((cleanup(_ostree_kernel_args_cleanup))) OstreeKernelArgs *a_kargs = NULL; __attribute__((cleanup(_ostree_kernel_args_cleanup))) OstreeKernelArgs *b_kargs = NULL; g_autofree char *a_boot_options_without_ostree = NULL; g_autofree char *b_boot_options_without_ostree = NULL; /* We checksum the kernel arguments *except* ostree= */ a_kargs = _ostree_kernel_args_from_string (a_boot_options); _ostree_kernel_args_replace (a_kargs, "ostree"); a_boot_options_without_ostree = _ostree_kernel_args_to_string (a_kargs); b_kargs = _ostree_kernel_args_from_string (b_boot_options); _ostree_kernel_args_replace (b_kargs, "ostree"); b_boot_options_without_ostree = _ostree_kernel_args_to_string (b_kargs); if (strcmp (a_boot_options_without_ostree, b_boot_options_without_ostree) != 0) return FALSE; } return TRUE; } /* This used to be a temporary hack to create "current" symbolic link * that's easy to follow inside the gnome-ostree build scripts (now * gnome-continuous). It wasn't atomic, and nowadays people can use * the OSTree API to find deployments. */ static gboolean cleanup_legacy_current_symlinks (OstreeSysroot *self, GCancellable *cancellable, GError **error) { g_autoptr(GString) buf = g_string_new (""); for (guint i = 0; i < self->deployments->len; i++) { OstreeDeployment *deployment = self->deployments->pdata[i]; const char *osname = ostree_deployment_get_osname (deployment); g_string_truncate (buf, 0); g_string_append_printf (buf, "ostree/deploy/%s/current", osname); if (!ot_ensure_unlinked_at (self->sysroot_fd, buf->str, error)) return FALSE; } return TRUE; } static gboolean is_ro_mount (const char *path) { #ifdef HAVE_LIBMOUNT /* Dragging in all of this crud is apparently necessary just to determine * whether something is a mount point. * * Systemd has a totally different implementation in * src/basic/mount-util.c. */ struct libmnt_table *tb = mnt_new_table_from_file ("/proc/self/mountinfo"); struct libmnt_fs *fs; struct libmnt_cache *cache; gboolean is_mount = FALSE; struct statvfs stvfsbuf; if (!tb) return FALSE; /* to canonicalize all necessary paths */ cache = mnt_new_cache (); mnt_table_set_cache (tb, cache); fs = mnt_table_find_target(tb, path, MNT_ITER_BACKWARD); is_mount = fs && mnt_fs_get_target (fs); #ifdef HAVE_MNT_UNREF_CACHE mnt_unref_table (tb); mnt_unref_cache (cache); #else mnt_free_table (tb); mnt_free_cache (cache); #endif if (!is_mount) return FALSE; /* We *could* parse the options, but it seems more reliable to * introspect the actual mount at runtime. */ if (statvfs (path, &stvfsbuf) == 0) return (stvfsbuf.f_flag & ST_RDONLY) != 0; #endif return FALSE; } /** * ostree_sysroot_write_deployments: * @self: Sysroot * @new_deployments: (element-type OstreeDeployment): List of new deployments * @cancellable: Cancellable * @error: Error * * Older version of ostree_sysroot_write_deployments_with_options(). This * version will perform post-deployment cleanup by default. */ gboolean ostree_sysroot_write_deployments (OstreeSysroot *self, GPtrArray *new_deployments, GCancellable *cancellable, GError **error) { OstreeSysrootWriteDeploymentsOpts opts = { .do_postclean = TRUE }; return ostree_sysroot_write_deployments_with_options (self, new_deployments, &opts, cancellable, error); } /** * ostree_sysroot_write_deployments_with_options: * @self: Sysroot * @new_deployments: (element-type OstreeDeployment): List of new deployments * @opts: Options * @cancellable: Cancellable * @error: Error * * Assuming @new_deployments have already been deployed in place on disk via * ostree_sysroot_deploy_tree(), atomically update bootloader configuration. By * default, no post-transaction cleanup will be performed. You should invoke * ostree_sysroot_cleanup() at some point after the transaction, or specify * `do_postclean` in @opts. Skipping the post-transaction cleanup is useful * if for example you want to control pruning of the repository. */ gboolean ostree_sysroot_write_deployments_with_options (OstreeSysroot *self, GPtrArray *new_deployments, OstreeSysrootWriteDeploymentsOpts *opts, GCancellable *cancellable, GError **error) { gboolean ret = FALSE; guint i; gboolean requires_new_bootversion = FALSE; gboolean found_booted_deployment = FALSE; gboolean bootloader_is_atomic = FALSE; gboolean boot_was_ro_mount = FALSE; SyncStats syncstats = { 0, }; g_autoptr(OstreeBootloader) bootloader = NULL; g_assert (self->loaded); /* Assign a bootserial to each new deployment. */ g_hash_table_unref (assign_bootserials (new_deployments)); /* Determine whether or not we need to touch the bootloader * configuration. If we have an equal number of deployments with * matching bootloader configuration, then we can just swap the * subbootversion bootlinks. */ if (new_deployments->len != self->deployments->len) requires_new_bootversion = TRUE; else { for (i = 0; i < new_deployments->len; i++) { if (!deployment_bootconfigs_equal (new_deployments->pdata[i], self->deployments->pdata[i])) { requires_new_bootversion = TRUE; break; } } } for (i = 0; i < new_deployments->len; i++) { OstreeDeployment *deployment = new_deployments->pdata[i]; g_autoptr(GFile) deployment_root = NULL; if (deployment == self->booted_deployment) found_booted_deployment = TRUE; deployment_root = ostree_sysroot_get_deployment_directory (self, deployment); if (!g_file_query_exists (deployment_root, NULL)) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "Unable to find expected deployment root: %s", gs_file_get_path_cached (deployment_root)); goto out; } ostree_deployment_set_index (deployment, i); } if (self->booted_deployment && !found_booted_deployment) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "Attempting to remove booted deployment"); goto out; } if (!requires_new_bootversion) { if (!create_new_bootlinks (self, self->bootversion, new_deployments, cancellable, error)) { g_prefix_error (error, "Creating new current bootlinks: "); goto out; } if (!full_system_sync (self, &syncstats, cancellable, error)) { g_prefix_error (error, "Full sync: "); goto out; } if (!swap_bootlinks (self, self->bootversion, new_deployments, cancellable, error)) { g_prefix_error (error, "Swapping current bootlinks: "); goto out; } bootloader_is_atomic = TRUE; } else { int new_bootversion = self->bootversion ? 0 : 1; g_autofree char* new_loader_entries_dir = NULL; g_autoptr(OstreeRepo) repo = NULL; gboolean show_osname = FALSE; if (self->booted_deployment) boot_was_ro_mount = is_ro_mount ("/boot"); g_debug ("boot is ro: %s", boot_was_ro_mount ? "yes" : "no"); if (boot_was_ro_mount) { if (mount ("/boot", "/boot", NULL, MS_REMOUNT | MS_SILENT, NULL) < 0) { glnx_set_prefix_error_from_errno (error, "%s", "Remounting /boot read-write"); goto out; } } if (!_ostree_sysroot_query_bootloader (self, &bootloader, cancellable, error)) goto out; new_loader_entries_dir = g_strdup_printf ("boot/loader.%d/entries", new_bootversion); if (!glnx_shutil_rm_rf_at (self->sysroot_fd, new_loader_entries_dir, cancellable, error)) goto out; if (!glnx_shutil_mkdir_p_at (self->sysroot_fd, new_loader_entries_dir, 0755, cancellable, error)) goto out; /* Need the repo to try and extract the versions for deployments. * But this is a "nice-to-have" for the bootloader UI, so failure * here is not fatal to the whole operation. We just gracefully * fall back to the deployment index. */ (void) ostree_sysroot_get_repo (self, &repo, cancellable, NULL); /* Only show the osname in bootloader titles if there are multiple * osname's among the new deployments. Check for that here. */ for (i = 1; i < new_deployments->len; i++) { const gchar *osname_0, *osname_i; osname_0 = ostree_deployment_get_osname (new_deployments->pdata[0]); osname_i = ostree_deployment_get_osname (new_deployments->pdata[i]); if (!g_str_equal (osname_0, osname_i)) { show_osname = TRUE; break; } } for (i = 0; i < new_deployments->len; i++) { OstreeDeployment *deployment = new_deployments->pdata[i]; if (!install_deployment_kernel (self, repo, new_bootversion, deployment, new_deployments->len, show_osname, cancellable, error)) { g_prefix_error (error, "Installing kernel: "); goto out; } } /* Create and swap bootlinks for *new* version */ if (!create_new_bootlinks (self, new_bootversion, new_deployments, cancellable, error)) { g_prefix_error (error, "Creating new version bootlinks: "); goto out; } if (!swap_bootlinks (self, new_bootversion, new_deployments, cancellable, error)) { g_prefix_error (error, "Swapping new version bootlinks: "); goto out; } g_debug ("Using bootloader: %s", bootloader ? g_type_name (G_TYPE_FROM_INSTANCE (bootloader)) : "(none)"); if (bootloader) bootloader_is_atomic = _ostree_bootloader_is_atomic (bootloader); if (bootloader) { if (!_ostree_bootloader_write_config (bootloader, new_bootversion, cancellable, error)) { g_prefix_error (error, "Bootloader write config: "); goto out; } } if (!prepare_new_bootloader_link (self, self->bootversion, new_bootversion, cancellable, error)) { g_prefix_error (error, "Preparing final bootloader swap: "); goto out; } if (!full_system_sync (self, &syncstats, cancellable, error)) { g_prefix_error (error, "Full sync: "); goto out; } if (!swap_bootloader (self, self->bootversion, new_bootversion, cancellable, error)) { g_prefix_error (error, "Final bootloader swap: "); goto out; } } { g_autofree char *msg = g_strdup_printf ("%s; bootconfig swap: %s deployment count change: %i", (bootloader_is_atomic ? "Transaction complete" : "Bootloader updated"), requires_new_bootversion ? "yes" : "no", new_deployments->len - self->deployments->len); #ifdef HAVE_LIBSYSTEMD sd_journal_send ("MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(OSTREE_DEPLOYMENT_COMPLETE_ID), "MESSAGE=%s", msg, "OSTREE_BOOTLOADER=%s", bootloader ? _ostree_bootloader_get_name (bootloader) : "none", "OSTREE_BOOTLOADER_ATOMIC=%s", bootloader_is_atomic ? "yes" : "no", "OSTREE_DID_BOOTSWAP=%s", requires_new_bootversion ? "yes" : "no", "OSTREE_N_DEPLOYMENTS=%u", new_deployments->len, "OSTREE_SYNCFS_ROOT_MSEC=%" G_GUINT64_FORMAT, syncstats.root_syncfs_msec, "OSTREE_SYNCFS_BOOT_MSEC=%" G_GUINT64_FORMAT, syncstats.boot_syncfs_msec, "OSTREE_SYNCFS_EXTRA_MSEC=%" G_GUINT64_FORMAT, syncstats.extra_syncfs_msec, NULL); #endif _ostree_sysroot_emit_journal_msg (self, msg); } if (!_ostree_sysroot_bump_mtime (self, error)) goto out; /* Now reload from disk */ if (!ostree_sysroot_load (self, cancellable, error)) { g_prefix_error (error, "Reloading deployments after commit: "); goto out; } if (!cleanup_legacy_current_symlinks (self, cancellable, error)) goto out; /* And finally, cleanup of any leftover data. */ if (opts->do_postclean) { if (!ostree_sysroot_cleanup (self, cancellable, error)) { g_prefix_error (error, "Performing final cleanup: "); goto out; } } ret = TRUE; out: if (boot_was_ro_mount) { if (mount ("/boot", "/boot", NULL, MS_REMOUNT | MS_RDONLY | MS_SILENT, NULL) < 0) { /* Only make this a warning because we don't want to * completely bomb out if some other process happened to * jump in and open a file there. */ int errsv = errno; g_printerr ("warning: Failed to remount /boot read-only: %s\n", strerror (errsv)); } } return ret; } static gboolean allocate_deployserial (OstreeSysroot *self, const char *osname, const char *revision, int *out_deployserial, GCancellable *cancellable, GError **error) { int new_deployserial = 0; g_autoptr(GPtrArray) tmp_current_deployments = g_ptr_array_new_with_free_func (g_object_unref); glnx_fd_close int deploy_dfd = -1; if (!glnx_opendirat (self->sysroot_fd, "ostree/deploy", TRUE, &deploy_dfd, error)) return FALSE; if (!_ostree_sysroot_list_deployment_dirs_for_os (deploy_dfd, osname, tmp_current_deployments, cancellable, error)) return FALSE; for (guint i = 0; i < tmp_current_deployments->len; i++) { OstreeDeployment *deployment = tmp_current_deployments->pdata[i]; if (strcmp (ostree_deployment_get_csum (deployment), revision) != 0) continue; new_deployserial = MAX(new_deployserial, ostree_deployment_get_deployserial (deployment)+1); } *out_deployserial = new_deployserial; return TRUE; } /** * ostree_sysroot_deploy_tree: * @self: Sysroot * @osname: (allow-none): osname to use for merge deployment * @revision: Checksum to add * @origin: (allow-none): Origin to use for upgrades * @provided_merge_deployment: (allow-none): Use this deployment for merge path * @override_kernel_argv: (allow-none) (array zero-terminated=1) (element-type utf8): Use these as kernel arguments; if %NULL, inherit options from provided_merge_deployment * @out_new_deployment: (out): The new deployment path * @cancellable: Cancellable * @error: Error * * Check out deployment tree with revision @revision, performing a 3 * way merge with @provided_merge_deployment for configuration. */ gboolean ostree_sysroot_deploy_tree (OstreeSysroot *self, const char *osname, const char *revision, GKeyFile *origin, OstreeDeployment *provided_merge_deployment, char **override_kernel_argv, OstreeDeployment **out_new_deployment, GCancellable *cancellable, GError **error) { g_return_val_if_fail (osname != NULL || self->booted_deployment != NULL, FALSE); if (osname == NULL) osname = ostree_deployment_get_osname (self->booted_deployment); const char *osdeploypath = glnx_strjoina ("ostree/deploy/", osname); glnx_fd_close int os_deploy_dfd = -1; if (!glnx_opendirat (self->sysroot_fd, osdeploypath, TRUE, &os_deploy_dfd, error)) return FALSE; OstreeRepo *repo = ostree_sysroot_repo (self); g_autoptr(OstreeDeployment) merge_deployment = NULL; if (provided_merge_deployment != NULL) merge_deployment = g_object_ref (provided_merge_deployment); gint new_deployserial; if (!allocate_deployserial (self, osname, revision, &new_deployserial, cancellable, error)) return FALSE; g_autofree char *new_bootcsum = NULL; g_autoptr(OstreeDeployment) new_deployment = ostree_deployment_new (0, osname, revision, new_deployserial, new_bootcsum, -1); ostree_deployment_set_origin (new_deployment, origin); /* Check out the userspace tree onto the filesystem */ glnx_fd_close int deployment_dfd = -1; if (!checkout_deployment_tree (self, repo, new_deployment, &deployment_dfd, cancellable, error)) { g_prefix_error (error, "Checking out tree: "); return FALSE; } g_autoptr(OstreeKernelLayout) kernel_layout = NULL; if (!get_kernel_from_tree (deployment_dfd, &kernel_layout, cancellable, error)) return FALSE; _ostree_deployment_set_bootcsum (new_deployment, kernel_layout->bootcsum); /* Create an empty boot configuration; we will merge things into * it as we go. */ g_autoptr(OstreeBootconfigParser) bootconfig = ostree_bootconfig_parser_new (); ostree_deployment_set_bootconfig (new_deployment, bootconfig); g_autoptr(OstreeSePolicy) sepolicy = NULL; if (!merge_configuration (self, repo, merge_deployment, new_deployment, deployment_dfd, &sepolicy, cancellable, error)) { g_prefix_error (error, "During /etc merge: "); return FALSE; } if (!selinux_relabel_var_if_needed (self, sepolicy, os_deploy_dfd, cancellable, error)) return FALSE; if (!(self->debug_flags & OSTREE_SYSROOT_DEBUG_MUTABLE_DEPLOYMENTS)) { if (!ostree_sysroot_deployment_set_mutable (self, new_deployment, FALSE, cancellable, error)) return FALSE; } { g_auto(OstreeSepolicyFsCreatecon) con = { 0, }; if (!_ostree_sepolicy_preparefscreatecon (&con, sepolicy, "/etc/ostree/remotes.d/dummy.conf", 0644, error)) return FALSE; /* Don't fsync here, as we assume that's all done in * ostree_sysroot_write_deployments(). */ if (!write_origin_file_internal (self, new_deployment, NULL, GLNX_FILE_REPLACE_NODATASYNC, cancellable, error)) { g_prefix_error (error, "Writing out origin file: "); return FALSE; } } /* After this, install_deployment_kernel() will set the other boot * options and write it out to disk. */ if (override_kernel_argv) { __attribute__((cleanup(_ostree_kernel_args_cleanup))) OstreeKernelArgs *kargs = NULL; g_autofree char *new_options = NULL; kargs = _ostree_kernel_args_new (); _ostree_kernel_args_append_argv (kargs, override_kernel_argv); new_options = _ostree_kernel_args_to_string (kargs); ostree_bootconfig_parser_set (bootconfig, "options", new_options); } ot_transfer_out_value (out_new_deployment, &new_deployment); return TRUE; } /** * ostree_sysroot_deployment_set_kargs: * @self: Sysroot * @deployment: A deployment * @new_kargs: (array zero-terminated=1) (element-type utf8): Replace deployment's kernel arguments * @cancellable: Cancellable * @error: Error * * Entirely replace the kernel arguments of @deployment with the * values in @new_kargs. */ gboolean ostree_sysroot_deployment_set_kargs (OstreeSysroot *self, OstreeDeployment *deployment, char **new_kargs, GCancellable *cancellable, GError **error) { guint i; g_autoptr(GPtrArray) new_deployments = g_ptr_array_new_with_free_func (g_object_unref); g_autoptr(OstreeDeployment) new_deployment = NULL; __attribute__((cleanup(_ostree_kernel_args_cleanup))) OstreeKernelArgs *kargs = NULL; g_autofree char *new_options = NULL; OstreeBootconfigParser *new_bootconfig; new_deployment = ostree_deployment_clone (deployment); new_bootconfig = ostree_deployment_get_bootconfig (new_deployment); kargs = _ostree_kernel_args_new (); _ostree_kernel_args_append_argv (kargs, new_kargs); new_options = _ostree_kernel_args_to_string (kargs); ostree_bootconfig_parser_set (new_bootconfig, "options", new_options); for (i = 0; i < self->deployments->len; i++) { OstreeDeployment *cur = self->deployments->pdata[i]; if (cur == deployment) g_ptr_array_add (new_deployments, g_object_ref (new_deployment)); else g_ptr_array_add (new_deployments, g_object_ref (cur)); } if (!ostree_sysroot_write_deployments (self, new_deployments, cancellable, error)) return FALSE; return TRUE; } /** * ostree_sysroot_deployment_set_mutable: * @self: Sysroot * @deployment: A deployment * @is_mutable: Whether or not deployment's files can be changed * @cancellable: Cancellable * @error: Error * * By default, deployment directories are not mutable. This function * will allow making them temporarily mutable, for example to allow * layering additional non-OSTree content. */ gboolean ostree_sysroot_deployment_set_mutable (OstreeSysroot *self, OstreeDeployment *deployment, gboolean is_mutable, GCancellable *cancellable, GError **error) { if (g_cancellable_set_error_if_cancelled (cancellable, error)) return FALSE; g_autofree char *deployment_path = ostree_sysroot_get_deployment_dirpath (self, deployment); glnx_fd_close int fd = -1; if (!glnx_opendirat (self->sysroot_fd, deployment_path, TRUE, &fd, error)) return FALSE; if (!_ostree_linuxfs_fd_alter_immutable_flag (fd, !is_mutable, cancellable, error)) return FALSE; return TRUE; }