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core: Don't try to walk up pkgcache parent chains

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My desktop system was aborting on upgrade with a missing metadata
object, which turned out to be the fact that my previous changes to
the package layering code pruned with depth=0, but the commit it was
looking for had a parent commit that had been pruned.

Closes: #475
Approved by: jlebon
This commit is contained in:
Colin Walters 2016-10-04 14:17:27 -04:00 committed by Atomic Bot
parent 7dd28fa964
commit f9f326f0f9
1 changed files with 29 additions and 52 deletions
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81
src/libpriv/rpmostree-core.c
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@ -786,45 +786,26 @@ out:
}
static gboolean
find_rev_with_sepolicy (OstreeRepo *repo,
const char *head,
OstreeSePolicy *sepolicy,
gboolean allow_noent,
char **out_rev,
GError **error)
commit_has_matching_sepolicy (OstreeRepo *repo,
const char *head,
OstreeSePolicy *sepolicy,
gboolean *out_matches,
GError **error)
{
gboolean ret = FALSE;
const char *sepolicy_csum_wanted = ostree_sepolicy_get_csum (sepolicy);
g_autofree char *commit_rev = g_strdup (head);
g_autoptr(GVariant) commit = NULL;
g_autofree char *sepolicy_csum = NULL;
/* walk up the branch until we find a matching policy */
while (commit_rev != NULL)
{
g_autoptr(GVariant) commit = NULL;
g_autofree char *sepolicy_csum = NULL;
if (!ostree_repo_load_commit (repo, head, &commit, NULL, error))
return FALSE;
g_assert (commit);
if (!ostree_repo_load_commit (repo, commit_rev, &commit, NULL, error))
goto out;
g_assert (commit);
if (!get_commit_sepolicy_csum (commit, &sepolicy_csum, error))
return FALSE;
if (!get_commit_sepolicy_csum (commit, &sepolicy_csum, error))
goto out;
*out_matches = strcmp (sepolicy_csum, sepolicy_csum_wanted) == 0;
if (strcmp (sepolicy_csum, sepolicy_csum_wanted) == 0)
break;
g_free (commit_rev);
commit_rev = ostree_commit_get_parent (commit);
}
if (commit_rev == NULL && !allow_noent)
goto out;
*out_rev = g_steal_pointer (&commit_rev);
ret = TRUE;
out:
return ret;
return TRUE;
}
static gboolean
@ -869,13 +850,9 @@ find_pkg_in_ostree (OstreeRepo *repo,
if (sepolicy)
{
g_autofree char *cached_rev_sel = NULL;
if (!find_rev_with_sepolicy (repo, cached_rev, sepolicy,
TRUE, &cached_rev_sel, error))
if (!commit_has_matching_sepolicy (repo, cached_rev, sepolicy,
out_selinux_match, error))
return FALSE;
if (cached_rev_sel)
*out_selinux_match = TRUE;
}
}
}
@ -1935,21 +1912,21 @@ rpmostree_context_assemble_commit (RpmOstreeContext *self,
g_autoptr(GVariant) pkg_commit = NULL;
g_autoptr(GVariant) header_variant = NULL;
const char *nevra = dnf_package_get_nevra (pkg);
gboolean sepolicy_matches;
{
g_autofree char *branch_head_rev = NULL;
if (!ostree_repo_resolve_rev (pkgcache_repo, cachebranch, FALSE,
&cached_rev, error))
goto out;
if (!ostree_repo_resolve_rev (pkgcache_repo, cachebranch, FALSE,
&branch_head_rev, error))
goto out;
if (self->sepolicy == NULL)
cached_rev = g_steal_pointer (&branch_head_rev);
else if (!find_rev_with_sepolicy (pkgcache_repo, branch_head_rev,
self->sepolicy, FALSE, &cached_rev,
error))
goto out;
}
if (self->sepolicy)
{
if (!commit_has_matching_sepolicy (pkgcache_repo, cached_rev,
self->sepolicy, &sepolicy_matches,
error))
goto out;
/* We already did any relabeling/reimporting above */
g_assert (sepolicy_matches);
}
if (!ostree_repo_load_variant (pkgcache_repo, OSTREE_OBJECT_TYPE_COMMIT, cached_rev,
&pkg_commit, error))