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repo: Add API to provide xattrs 

This will be used by rpm-ostree to provide SELinux security contexts,
without requiring us to actually label the disk.
This commit is contained in:
Colin Walters 2014-01-29 08:03:45 -05:00
parent c7bcfc1c61
commit be1acfafa0
2 changed files with 68 additions and 20 deletions
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77
src/libostree/ostree-repo-commit.c
View File

@ -1611,6 +1611,9 @@ struct OstreeRepoCommitModifier {
OstreeRepoCommitFilter filter;
gpointer user_data;
GDestroyNotify destroy_notify;
OstreeRepoCommitModifierXattrCallback xattr_callback;
gpointer xattr_user_data;
};
OstreeRepoCommitFilterResult
@ -1636,21 +1639,10 @@ _ostree_repo_commit_modifier_apply (OstreeRepo *self,
return result;
}
static gboolean
apply_commit_filter (OstreeRepo *self,
OstreeRepoCommitModifier *modifier,
GPtrArray *path,
GFileInfo *file_info,
GFileInfo **out_modified_info)
static char *
ptrarray_path_join (GPtrArray *path)
{
GString *path_buf;
OstreeRepoCommitFilterResult result;
if (modifier == NULL || modifier->filter == NULL)
{
*out_modified_info = g_object_ref (file_info);
return OSTREE_REPO_COMMIT_FILTER_ALLOW;
}
path_buf = g_string_new ("");
@ -1668,10 +1660,23 @@ apply_commit_filter (OstreeRepo *self,
}
}
result = _ostree_repo_commit_modifier_apply (self, modifier, path_buf->str, file_info, out_modified_info);
return g_string_free (path_buf, FALSE);
}
g_string_free (path_buf, TRUE);
return result;
static gboolean
apply_commit_filter (OstreeRepo *self,
OstreeRepoCommitModifier *modifier,
const char *relpath,
GFileInfo *file_info,
GFileInfo **out_modified_info)
{
if (modifier == NULL || modifier->filter == NULL)
{
*out_modified_info = g_object_ref (file_info);
return OSTREE_REPO_COMMIT_FILTER_ALLOW;
}
return _ostree_repo_commit_modifier_apply (self, modifier, relpath, file_info, out_modified_info);
}
static gboolean
@ -1726,6 +1731,7 @@ write_directory_to_mtree_internal (OstreeRepo *self,
gs_unref_variant GVariant *xattrs = NULL;
gs_free guchar *child_file_csum = NULL;
gs_free char *tmp_checksum = NULL;
gs_free char *relpath = NULL;
child_info = g_file_query_info (dir, OSTREE_GIO_FAST_QUERYINFO,
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
@ -1733,7 +1739,10 @@ write_directory_to_mtree_internal (OstreeRepo *self,
if (!child_info)
goto out;
filter_result = apply_commit_filter (self, modifier, path, child_info, &modified_info);
if (modifier != NULL)
relpath = ptrarray_path_join (path);
filter_result = apply_commit_filter (self, modifier, relpath, child_info, &modified_info);
if (filter_result == OSTREE_REPO_COMMIT_FILTER_ALLOW)
{
@ -1771,6 +1780,7 @@ write_directory_to_mtree_internal (OstreeRepo *self,
gs_unref_object GFile *child = NULL;
gs_unref_object GFileInfo *modified_info = NULL;
gs_unref_object OstreeMutableTree *child_mtree = NULL;
gs_free char *child_relpath = NULL;
const char *name;
if (!gs_file_enumerator_iterate (dir_enum, &child_info, NULL,
@ -1781,7 +1791,11 @@ write_directory_to_mtree_internal (OstreeRepo *self,
name = g_file_info_get_name (child_info);
g_ptr_array_add (path, (char*)name);
filter_result = apply_commit_filter (self, modifier, path, child_info, &modified_info);
if (modifier != NULL)
child_relpath = ptrarray_path_join (path);
filter_result = apply_commit_filter (self, modifier, child_relpath, child_info, &modified_info);
if (filter_result == OSTREE_REPO_COMMIT_FILTER_ALLOW)
{
@ -1849,7 +1863,12 @@ write_directory_to_mtree_internal (OstreeRepo *self,
goto out;
}
if (!(modifier && (modifier->flags & OSTREE_REPO_COMMIT_MODIFIER_FLAGS_SKIP_XATTRS) > 0))
if (modifier && modifier->xattr_callback)
{
xattrs = modifier->xattr_callback (self, child_relpath, child_info,
modifier->xattr_user_data);
}
else if (!(modifier && (modifier->flags & OSTREE_REPO_COMMIT_MODIFIER_FLAGS_SKIP_XATTRS) > 0))
{
g_clear_pointer (&xattrs, (GDestroyNotify) g_variant_unref);
if (!gs_file_get_all_xattrs (child, &xattrs, cancellable, error))
@ -2055,6 +2074,26 @@ ostree_repo_commit_modifier_unref (OstreeRepoCommitModifier *modifier)
return;
}
/**
* ostree_repo_commit_modifier_set_xattr_callback:
* @modifier: An #OstreeRepoCommitModifier
* @callback: Function to be invoked, should return extended attributes for path
* @user_data: (closure): Data for @callback:
*
* If set, this function should return extended attributes to use for
* the given path. This is useful for things like SELinux, where a build
* system can label the files as it's committing to the repository.
*/
void
ostree_repo_commit_modifier_set_xattr_callback (OstreeRepoCommitModifier *modifier,
OstreeRepoCommitModifierXattrCallback callback,
gpointer user_data)
{
modifier->xattr_callback = callback;
modifier->xattr_user_data = user_data;
}
G_DEFINE_BOXED_TYPE(OstreeRepoCommitModifier, ostree_repo_commit_modifier,
ostree_repo_commit_modifier_ref,
ostree_repo_commit_modifier_unref);

9
src/libostree/ostree-repo.h
View File

@ -300,6 +300,15 @@ OstreeRepoCommitModifier *ostree_repo_commit_modifier_new (OstreeRepoCommitModif
GType ostree_repo_commit_modifier_get_type (void);
typedef GVariant *(*OstreeRepoCommitModifierXattrCallback) (OstreeRepo *repo,
const char *path,
GFileInfo *file_info,
gpointer user_data);
void ostree_repo_commit_modifier_set_xattr_callback (OstreeRepoCommitModifier *modifier,
OstreeRepoCommitModifierXattrCallback callback,
gpointer user_data);
OstreeRepoCommitModifier *ostree_repo_commit_modifier_ref (OstreeRepoCommitModifier *modifier);
void ostree_repo_commit_modifier_unref (OstreeRepoCommitModifier *modifier);