Adding upstream version 1:2.3.19.1+dfsg1.upstream/1%2.3.19.1+dfsg1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 1156 insertions, 0 deletions

diff --git a/src/plugins/quota-clone/Makefile.am b/src/plugins/quota-clone/Makefile.am
new file mode 100644
index 0000000..ed4ba68
--- /dev/null
+++ b/src/plugins/quota-clone/Makefile.am
@@ -0,0 +1,19 @@
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diff --git a/src/plugins/quota-clone/Makefile.in b/src/plugins/quota-clone/Makefile.in
new file mode 100644
index 0000000..3f6157b
--- /dev/null
+++ b/src/plugins/quota-clone/Makefile.in
@@ -0,0 +1,822 @@
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+	-I$(top_srcdir)/src/lib-storage \
+	-I$(top_srcdir)/src/plugins/quota
+
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+	lib20_quota_clone_plugin.la
+
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+	quota-clone-plugin.c
+
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+	quota-clone-plugin.h
+
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+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign src/plugins/quota-clone/Makefile
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+	  *config.status*) \
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+	done
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+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+lib20_quota_clone_plugin.la: $(lib20_quota_clone_plugin_la_OBJECTS) $(lib20_quota_clone_plugin_la_DEPENDENCIES) $(EXTRA_lib20_quota_clone_plugin_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(lib20_quota_clone_plugin_la_LINK) -rpath $(moduledir) $(lib20_quota_clone_plugin_la_OBJECTS) $(lib20_quota_clone_plugin_la_LIBADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/quota-clone-plugin.Plo@am__quote@ # am--include-marker
+
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+	      "$$@" $$unique; \
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+	      $$unique; \
+	  fi; \
+	fi
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+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
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+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
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+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
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+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
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+	@echo "it deletes files that may require special tools to rebuild."
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+clean-am: clean-generic clean-libtool clean-moduleLTLIBRARIES \
+	mostlyclean-am
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+distclean: distclean-am
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+	-rm -f Makefile
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+	distclean-tags
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+dvi: dvi-am
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+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/plugins/quota-clone/quota-clone-plugin.c b/src/plugins/quota-clone/quota-clone-plugin.c
new file mode 100644
index 0000000..5f5efa4
--- /dev/null
+++ b/src/plugins/quota-clone/quota-clone-plugin.c
@@ -0,0 +1,308 @@
+/* Copyright (c) 2015-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "module-context.h"
+#include "ioloop.h"
+#include "dict.h"
+#include "mail-storage-private.h"
+#include "quota.h"
+#include "quota-clone-plugin.h"
+
+/* If mailbox is kept open for this many milliseconds after quota update,
+   flush quota-clone. */
+#define QUOTA_CLONE_FLUSH_DELAY_MSECS (10*1000)
+
+#define DICT_QUOTA_CLONE_PATH DICT_PATH_PRIVATE"quota/"
+#define DICT_QUOTA_CLONE_BYTES_PATH DICT_QUOTA_CLONE_PATH"storage"
+#define DICT_QUOTA_CLONE_COUNT_PATH DICT_QUOTA_CLONE_PATH"messages"
+
+#define QUOTA_CLONE_USER_CONTEXT_REQUIRE(obj) \
+	MODULE_CONTEXT_REQUIRE(obj, quota_clone_user_module)
+#define QUOTA_CLONE_USER_CONTEXT(obj) \
+	MODULE_CONTEXT(obj, quota_clone_user_module)
+#define QUOTA_CLONE_CONTEXT(obj) \
+	MODULE_CONTEXT_REQUIRE(obj, quota_clone_storage_module)
+
+static MODULE_CONTEXT_DEFINE_INIT(quota_clone_user_module,
+				  &mail_user_module_register);
+static MODULE_CONTEXT_DEFINE_INIT(quota_clone_storage_module,
+				  &mail_storage_module_register);
+
+struct quota_clone_user {
+	union mail_user_module_context module_ctx;
+	struct dict *dict;
+	struct timeout *to_quota_flush;
+	bool quota_changed;
+	bool quota_flushing;
+};
+
+static void
+quota_clone_dict_commit(const struct dict_commit_result *result,
+			struct quota_clone_user *quser)
+{
+	switch (result->ret) {
+	case DICT_COMMIT_RET_OK:
+	case DICT_COMMIT_RET_NOTFOUND:
+		if (!quser->quota_changed)
+			timeout_remove(&quser->to_quota_flush);
+		break;
+	case DICT_COMMIT_RET_FAILED:
+		quser->quota_changed = TRUE;
+		i_error("quota_clone_dict: Failed to write value: %s",
+			result->error);
+		break;
+	case DICT_COMMIT_RET_WRITE_UNCERTAIN:
+		quser->quota_changed = TRUE;
+		i_error("quota_clone_dict: Write was unconfirmed (timeout or disconnect): %s",
+			result->error);
+		break;
+	}
+
+	quser->quota_flushing = FALSE;
+}
+
+static bool quota_clone_flush_real(struct mail_user *user)
+{
+	struct quota_clone_user *quser =
+		QUOTA_CLONE_USER_CONTEXT_REQUIRE(user);
+	struct dict_transaction_context *trans;
+	struct quota_root_iter *iter;
+	struct quota_root *root;
+	uint64_t bytes_value, count_value, limit;
+	const char *error;
+	enum quota_get_result bytes_res, count_res;
+
+	/* we'll clone the first quota root */
+	iter = quota_root_iter_init_user(user);
+	root = quota_root_iter_next(iter);
+	quota_root_iter_deinit(&iter);
+	if (root == NULL) {
+		/* no quota roots defined - ignore */
+		quser->quota_changed = FALSE;
+		return TRUE;
+	}
+
+	/* get new values first */
+	bytes_res = quota_get_resource(root, "", QUOTA_NAME_STORAGE_BYTES,
+				       &bytes_value, &limit, &error);
+	if (bytes_res == QUOTA_GET_RESULT_INTERNAL_ERROR) {
+		i_error("quota_clone_plugin: "
+			"Failed to get quota resource "QUOTA_NAME_STORAGE_BYTES": %s",
+			error);
+		return TRUE;
+	}
+	count_res = quota_get_resource(root, "", QUOTA_NAME_MESSAGES,
+				       &count_value, &limit, &error);
+	if (count_res == QUOTA_GET_RESULT_INTERNAL_ERROR) {
+		i_error("quota_clone_plugin: "
+			"Failed to get quota resource "QUOTA_NAME_MESSAGES": %s",
+			error);
+		return TRUE;
+	}
+	if (bytes_res == QUOTA_GET_RESULT_UNKNOWN_RESOURCE &&
+	    count_res == QUOTA_GET_RESULT_UNKNOWN_RESOURCE) {
+		/* quota resources don't exist - no point in updating it */
+		return TRUE;
+	}
+	if (bytes_res == QUOTA_GET_RESULT_BACKGROUND_CALC &&
+	    count_res == QUOTA_GET_RESULT_BACKGROUND_CALC) {
+		/* Blocked by an ongoing quota calculation - try again later */
+		quser->quota_flushing = FALSE;
+		return FALSE;
+	}
+
+	/* Then update the resources that exist. The resources' existence can't
+	   change unless the quota backend is changed, so we don't worry about
+	   the special case of lookup changing from
+	   RESULT_LIMITED/RESULT_UNLIMITED to RESULT_UNKNOWN_RESOURCE, which
+	   leaves the old value unchanged. */
+	const struct dict_op_settings *set = mail_user_get_dict_op_settings(user);
+	trans = dict_transaction_begin(quser->dict, set);
+	if (bytes_res == QUOTA_GET_RESULT_LIMITED ||
+	    bytes_res == QUOTA_GET_RESULT_UNLIMITED) {
+		dict_set(trans, DICT_QUOTA_CLONE_BYTES_PATH,
+			 t_strdup_printf("%"PRIu64, bytes_value));
+	}
+	if (count_res == QUOTA_GET_RESULT_LIMITED ||
+	    count_res == QUOTA_GET_RESULT_UNLIMITED) {
+		dict_set(trans, DICT_QUOTA_CLONE_COUNT_PATH,
+			 t_strdup_printf("%"PRIu64, count_value));
+	}
+	quser->quota_changed = FALSE;
+	dict_transaction_commit_async(&trans, quota_clone_dict_commit, quser);
+	return FALSE;
+}
+
+static void quota_clone_flush(struct mail_user *user)
+{
+	struct quota_clone_user *quser =
+		QUOTA_CLONE_USER_CONTEXT_REQUIRE(user);
+
+	if (quser->quota_changed) {
+		i_assert(quser->to_quota_flush != NULL);
+		if (quser->quota_flushing) {
+			/* async quota commit is running in background. timeout is still
+			   active, so another update will be done later. */
+		} else {
+			quser->quota_flushing = TRUE;
+			/* Returns TRUE if flushing action is complete. */
+			if (quota_clone_flush_real(user)) {
+				quser->quota_flushing = FALSE;
+				timeout_remove(&quser->to_quota_flush);
+			}
+		}
+	} else {
+		timeout_remove(&quser->to_quota_flush);
+	}
+}
+
+static struct mail_user *quota_mailbox_get_user(struct mailbox *box)
+{
+	struct mail_namespace *ns = mailbox_list_get_namespace(box->list);
+	return ns->owner != NULL ? ns->owner : ns->user;
+}
+
+static void quota_clone_changed(struct mailbox *box)
+{
+	struct mail_user *user = quota_mailbox_get_user(box);
+	struct quota_clone_user *quser =
+		QUOTA_CLONE_USER_CONTEXT_REQUIRE(user);
+
+	quser->quota_changed = TRUE;
+	if (quser->to_quota_flush == NULL) {
+		quser->to_quota_flush = timeout_add(QUOTA_CLONE_FLUSH_DELAY_MSECS,
+						    quota_clone_flush, user);
+	}
+}
+
+static int quota_clone_save_finish(struct mail_save_context *ctx)
+{
+	union mailbox_module_context *qbox =
+		QUOTA_CLONE_CONTEXT(ctx->transaction->box);
+
+	quota_clone_changed(ctx->transaction->box);
+	return qbox->super.save_finish(ctx);
+}
+
+static int
+quota_clone_copy(struct mail_save_context *ctx, struct mail *mail)
+{
+	union mailbox_module_context *qbox =
+		QUOTA_CLONE_CONTEXT(ctx->transaction->box);
+
+	quota_clone_changed(ctx->transaction->box);
+	return qbox->super.copy(ctx, mail);
+}
+
+static void
+quota_clone_mailbox_sync_notify(struct mailbox *box, uint32_t uid,
+				enum mailbox_sync_type sync_type)
+{
+	union mailbox_module_context *qbox = QUOTA_CLONE_CONTEXT(box);
+
+	if (qbox->super.sync_notify != NULL)
+		qbox->super.sync_notify(box, uid, sync_type);
+
+	if (sync_type == MAILBOX_SYNC_TYPE_EXPUNGE)
+		quota_clone_changed(box);
+}
+
+static void quota_clone_mailbox_allocated(struct mailbox *box)
+{
+	struct quota_clone_user *quser =
+		QUOTA_CLONE_USER_CONTEXT(box->storage->user);
+	struct mailbox_vfuncs *v = box->vlast;
+	union mailbox_module_context *qbox;
+
+	if (quser == NULL)
+		return;
+
+	qbox = p_new(box->pool, union mailbox_module_context, 1);
+	qbox->super = *v;
+	box->vlast = &qbox->super;
+
+	v->save_finish = quota_clone_save_finish;
+	v->copy = quota_clone_copy;
+	v->sync_notify = quota_clone_mailbox_sync_notify;
+	MODULE_CONTEXT_SET_SELF(box, quota_clone_storage_module, qbox);
+}
+
+static void quota_clone_mail_user_deinit_pre(struct mail_user *user)
+{
+	struct quota_clone_user *quser = QUOTA_CLONE_USER_CONTEXT_REQUIRE(user);
+
+	dict_wait(quser->dict);
+	/* Check once more if quota needs to be updated. This needs to be done
+	   in deinit_pre(), because at deinit() the quota is already
+	   deinitialized. */
+	if (quser->to_quota_flush != NULL) {
+		i_assert(!quser->quota_flushing);
+		quota_clone_flush(user);
+		dict_wait(quser->dict);
+		/* If dict update fails or background calculation is running,
+		   the timeout is still set. Just forget about it. */
+		timeout_remove(&quser->to_quota_flush);
+	}
+	quser->module_ctx.super.deinit_pre(user);
+}
+
+static void quota_clone_mail_user_deinit(struct mail_user *user)
+{
+	struct quota_clone_user *quser = QUOTA_CLONE_USER_CONTEXT_REQUIRE(user);
+
+	/* wait once more, just in case something changed quota during
+	   deinit_pre() */
+	dict_wait(quser->dict);
+	i_assert(quser->to_quota_flush == NULL);
+	dict_deinit(&quser->dict);
+	quser->module_ctx.super.deinit(user);
+}
+
+static void quota_clone_mail_user_created(struct mail_user *user)
+{
+	struct quota_clone_user *quser;
+	struct mail_user_vfuncs *v = user->vlast;
+	struct dict_settings dict_set;
+	struct dict *dict;
+	const char *uri, *error;
+
+	uri = mail_user_plugin_getenv(user, "quota_clone_dict");
+	if (uri == NULL || uri[0] == '\0') {
+		e_debug(user->event, "The quota_clone_dict setting is missing from configuration");
+		return;
+	}
+
+	i_zero(&dict_set);
+	dict_set.base_dir = user->set->base_dir;
+	dict_set.event_parent = user->event;
+	if (dict_init(uri, &dict_set, &dict, &error) < 0) {
+		i_error("quota_clone_dict: Failed to initialize '%s': %s",
+			uri, error);
+		return;
+	}
+
+	quser = p_new(user->pool, struct quota_clone_user, 1);
+	quser->module_ctx.super = *v;
+	user->vlast = &quser->module_ctx.super;
+	v->deinit_pre = quota_clone_mail_user_deinit_pre;
+	v->deinit = quota_clone_mail_user_deinit;
+	quser->dict = dict;
+	MODULE_CONTEXT_SET(user, quota_clone_user_module, quser);
+}
+
+static struct mail_storage_hooks quota_clone_mail_storage_hooks = {
+	.mailbox_allocated = quota_clone_mailbox_allocated,
+	.mail_user_created = quota_clone_mail_user_created
+};
+
+void quota_clone_plugin_init(struct module *module ATTR_UNUSED)
+{
+	mail_storage_hooks_add(module, &quota_clone_mail_storage_hooks);
+}
+
+void quota_clone_plugin_deinit(void)
+{
+	mail_storage_hooks_remove(&quota_clone_mail_storage_hooks);
+}
+
+const char *quota_clone_plugin_dependencies[] = { "quota", NULL };
diff --git a/src/plugins/quota-clone/quota-clone-plugin.h b/src/plugins/quota-clone/quota-clone-plugin.h
new file mode 100644
index 0000000..9ae1d8f
--- /dev/null
+++ b/src/plugins/quota-clone/quota-clone-plugin.h
@@ -0,0 +1,7 @@
+#ifndef QUOTA_CLONE_PLUGIN_H
+#define QUOTA_CLONE_PLUGIN_H
+
+void quota_clone_plugin_init(struct module *module);
+void quota_clone_plugin_deinit(void);
+
+#endif