diff options
Diffstat (limited to 'src/plugins/quota-clone')
| -rw-r--r-- | src/plugins/quota-clone/Makefile.am | 19 | ||||
| -rw-r--r-- | src/plugins/quota-clone/Makefile.in | 822 | ||||
| -rw-r--r-- | src/plugins/quota-clone/quota-clone-plugin.c | 308 | ||||
| -rw-r--r-- | src/plugins/quota-clone/quota-clone-plugin.h | 7 |
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 @@ +AM_CPPFLAGS = \ + -I$(top_srcdir)/src/lib \ + -I$(top_srcdir)/src/lib-dict \ + -I$(top_srcdir)/src/lib-mail \ + -I$(top_srcdir)/src/lib-index \ + -I$(top_srcdir)/src/lib-storage \ + -I$(top_srcdir)/src/plugins/quota + +NOPLUGIN_LDFLAGS = +lib20_quota_clone_plugin_la_LDFLAGS = -module -avoid-version + +module_LTLIBRARIES = \ + lib20_quota_clone_plugin.la + +lib20_quota_clone_plugin_la_SOURCES = \ + quota-clone-plugin.c + +noinst_HEADERS = \ + quota-clone-plugin.h 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 @@ +# Makefile.in generated by automake 1.16.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2018 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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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, "a_clone_mail_storage_hooks); +} + +void quota_clone_plugin_deinit(void) +{ + mail_storage_hooks_remove("a_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 |