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quota.c
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quota.c
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/* Copyright (c) 2005-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "array.h"
#include "hash.h"
#include "str.h"
#include "ioloop.h"
#include "net.h"
#include "write-full.h"
#include "eacces-error.h"
#include "wildcard-match.h"
#include "dict.h"
#include "mailbox-list-private.h"
#include "quota-private.h"
#include "quota-fs.h"
#include "llist.h"
#include "program-client.h"
#include "settings-parser.h"
#include <sys/wait.h>
#define DEFAULT_QUOTA_EXCEEDED_MSG \
"Quota exceeded (mailbox for user is full)"
#define QUOTA_LIMIT_SET_PATH DICT_PATH_PRIVATE"quota/limit/"
/* How many seconds after the userdb lookup do we still want to execute the
quota_over_script. This applies to quota_over_flag_lazy_check=yes and also
after unhibernating IMAP connections. */
#define QUOTA_OVER_FLAG_MAX_DELAY_SECS 10
struct quota_root_iter {
struct quota *quota;
struct mailbox *box;
unsigned int i;
};
unsigned int quota_module_id = 0;
extern struct quota_backend quota_backend_count;
extern struct quota_backend quota_backend_dict;
extern struct quota_backend quota_backend_dirsize;
extern struct quota_backend quota_backend_fs;
extern struct quota_backend quota_backend_imapc;
extern struct quota_backend quota_backend_maildir;
static const struct quota_backend *quota_internal_backends[] = {
#ifdef HAVE_FS_QUOTA
"a_backend_fs,
#endif
"a_backend_count,
"a_backend_dict,
"a_backend_dirsize,
"a_backend_imapc,
"a_backend_maildir
};
static ARRAY(const struct quota_backend*) quota_backends;
static void hidden_param_handler(struct quota_root *_root, const char *param_value);
static void ignoreunlim_param_handler(struct quota_root *_root, const char *param_value);
static void noenforcing_param_handler(struct quota_root *_root, const char *param_value);
static void ns_param_handler(struct quota_root *_root, const char *param_value);
struct quota_param_parser quota_param_hidden = {.param_name = "hidden", .param_handler = hidden_param_handler};
struct quota_param_parser quota_param_ignoreunlimited = {.param_name = "ignoreunlimited", .param_handler = ignoreunlim_param_handler};
struct quota_param_parser quota_param_noenforcing = {.param_name = "noenforcing", .param_handler = noenforcing_param_handler};
struct quota_param_parser quota_param_ns = {.param_name = "ns=", .param_handler = ns_param_handler};
static enum quota_alloc_result quota_default_test_alloc(
struct quota_transaction_context *ctx, uoff_t size,
const char **error_r);
static void quota_over_flag_check_root(struct quota_root *root);
static const struct quota_backend *quota_backend_find(const char *name)
{
const struct quota_backend *const *backend;
array_foreach("a_backends, backend) {
if (strcmp((*backend)->name, name) == 0)
return *backend;
}
return NULL;
}
void quota_backend_register(const struct quota_backend *backend)
{
i_assert(quota_backend_find(backend->name) == NULL);
array_append("a_backends, &backend, 1);
}
void quota_backend_unregister(const struct quota_backend *backend)
{
for(unsigned int i = 0; i < array_count("a_backends); i++) {
const struct quota_backend *const *be =
array_idx("a_backends, i);
if (strcmp((*be)->name, backend->name) == 0) {
array_delete("a_backends, i, 1);
return;
}
}
i_unreached();
}
void quota_backends_register(void);
void quota_backends_unregister(void);
void quota_backends_register(void)
{
i_array_init("a_backends, 8);
array_append("a_backends, quota_internal_backends,
N_ELEMENTS(quota_internal_backends));
}
void quota_backends_unregister(void)
{
for(size_t i = 0; i < N_ELEMENTS(quota_internal_backends); i++) {
quota_backend_unregister(quota_internal_backends[i]);
}
i_assert(array_count("a_backends) == 0);
array_free("a_backends);
}
static int quota_root_add_rules(struct mail_user *user, const char *root_name,
struct quota_root_settings *root_set,
const char **error_r)
{
const char *rule_name, *rule, *error;
unsigned int i;
rule_name = t_strconcat(root_name, "_rule", NULL);
for (i = 2;; i++) {
rule = mail_user_plugin_getenv(user, rule_name);
if (rule == NULL)
break;
if (quota_root_add_rule(root_set, rule, &error) < 0) {
*error_r = t_strdup_printf("Invalid rule %s: %s",
rule, error);
return -1;
}
rule_name = t_strdup_printf("%s_rule%d", root_name, i);
}
return 0;
}
static int
quota_root_add_warning_rules(struct mail_user *user, const char *root_name,
struct quota_root_settings *root_set,
const char **error_r)
{
const char *rule_name, *rule, *error;
unsigned int i;
rule_name = t_strconcat(root_name, "_warning", NULL);
for (i = 2;; i++) {
rule = mail_user_plugin_getenv(user, rule_name);
if (rule == NULL)
break;
if (quota_root_add_warning_rule(root_set, rule, &error) < 0) {
*error_r = t_strdup_printf("Invalid warning rule: %s",
rule);
return -1;
}
rule_name = t_strdup_printf("%s_warning%d", root_name, i);
}
return 0;
}
static int
quota_root_parse_set(struct mail_user *user, const char *root_name,
struct quota_root_settings *root_set,
const char **error_r)
{
const char *name, *value;
name = t_strconcat(root_name, "_set", NULL);
value = mail_user_plugin_getenv(user, name);
if (value == NULL)
return 0;
if (strncmp(value, "dict:", 5) != 0) {
*error_r = t_strdup_printf("%s supports only dict backend", name);
return -1;
}
root_set->limit_set = p_strdup(root_set->set->pool, value+5);
return 0;
}
static int
quota_root_settings_init(struct quota_settings *quota_set, const char *root_def,
struct quota_root_settings **set_r,
const char **error_r)
{
struct quota_root_settings *root_set;
const struct quota_backend *backend;
const char *p, *args, *backend_name;
/* <backend>[:<quota root name>[:<backend args>]] */
p = strchr(root_def, ':');
if (p == NULL) {
backend_name = root_def;
args = NULL;
} else {
backend_name = t_strdup_until(root_def, p);
args = p + 1;
}
backend = quota_backend_find(backend_name);
if (backend == NULL) {
*error_r = t_strdup_printf("Unknown quota backend: %s",
backend_name);
return -1;
}
root_set = p_new(quota_set->pool, struct quota_root_settings, 1);
root_set->set = quota_set;
root_set->backend = backend;
if (args != NULL) {
/* save root's name */
p = strchr(args, ':');
if (p == NULL) {
root_set->name = p_strdup(quota_set->pool, args);
args = NULL;
} else {
root_set->name =
p_strdup_until(quota_set->pool, args, p);
args = p + 1;
}
} else {
root_set->name = "";
}
root_set->args = p_strdup(quota_set->pool, args);
if (quota_set->debug) {
i_debug("Quota root: name=%s backend=%s args=%s",
root_set->name, backend_name, args == NULL ? "" : args);
}
p_array_init(&root_set->rules, quota_set->pool, 4);
p_array_init(&root_set->warning_rules, quota_set->pool, 4);
array_append("a_set->root_sets, &root_set, 1);
*set_r = root_set;
return 0;
}
static int
quota_root_add(struct quota_settings *quota_set, struct mail_user *user,
const char *env, const char *root_name, const char **error_r)
{
struct quota_root_settings *root_set;
const char *set_name, *value;
if (quota_root_settings_init(quota_set, env, &root_set, error_r) < 0)
return -1;
root_set->set_name = p_strdup(quota_set->pool, root_name);
if (quota_root_add_rules(user, root_name, root_set, error_r) < 0)
return -1;
if (quota_root_add_warning_rules(user, root_name, root_set, error_r) < 0)
return -1;
if (quota_root_parse_set(user, root_name, root_set, error_r) < 0)
return -1;
set_name = t_strconcat(root_name, "_grace", NULL);
value = mail_user_plugin_getenv(user, set_name);
if (quota_root_parse_grace(root_set, value, error_r) < 0) {
*error_r = t_strdup_printf("Invalid %s value '%s': %s",
set_name, value, *error_r);
return -1;
}
return 0;
}
const char *quota_alloc_result_errstr(enum quota_alloc_result res,
struct quota_transaction_context *qt)
{
switch (res) {
case QUOTA_ALLOC_RESULT_OK:
return "OK";
case QUOTA_ALLOC_RESULT_BACKGROUND_CALC:
return "Blocked by an ongoing background quota calculation";
case QUOTA_ALLOC_RESULT_TEMPFAIL:
return "Internal quota calculation error";
case QUOTA_ALLOC_RESULT_OVER_MAXSIZE:
return "Mail size is larger than the maximum size allowed by "
"server configuration";
case QUOTA_ALLOC_RESULT_OVER_QUOTA_LIMIT:
case QUOTA_ALLOC_RESULT_OVER_QUOTA:
return qt->quota->set->quota_exceeded_msg;
}
i_unreached();
}
int quota_user_read_settings(struct mail_user *user,
struct quota_settings **set_r,
const char **error_r)
{
struct quota_settings *quota_set;
char root_name[5 + MAX_INT_STRLEN + 1];
const char *env, *error;
unsigned int i;
pool_t pool;
pool = pool_alloconly_create("quota settings", 2048);
quota_set = p_new(pool, struct quota_settings, 1);
quota_set->pool = pool;
quota_set->test_alloc = quota_default_test_alloc;
quota_set->debug = user->mail_debug;
quota_set->quota_exceeded_msg =
mail_user_plugin_getenv(user, "quota_exceeded_message");
if (quota_set->quota_exceeded_msg == NULL)
quota_set->quota_exceeded_msg = DEFAULT_QUOTA_EXCEEDED_MSG;
quota_set->vsizes = mail_user_plugin_getenv_bool(user, "quota_vsizes");
const char *max_size = mail_user_plugin_getenv(user,
"quota_max_mail_size");
if (max_size != NULL) {
const char *error = NULL;
if (settings_get_size(max_size, "a_set->max_mail_size,
&error) < 0) {
*error_r = t_strdup_printf("quota_max_mail_size: %s",
error);
return -1;
}
}
p_array_init("a_set->root_sets, pool, 4);
if (i_strocpy(root_name, "quota", sizeof(root_name)) < 0)
i_unreached();
for (i = 2;; i++) {
env = mail_user_plugin_getenv(user, root_name);
if (env == NULL || *env == '\0')
break;
if (quota_root_add(quota_set, user, env, root_name,
&error) < 0) {
*error_r = t_strdup_printf("Invalid quota root %s: %s",
root_name, error);
pool_unref(&pool);
return -1;
}
if (i_snprintf(root_name, sizeof(root_name), "quota%d", i) < 0)
i_unreached();
}
if (quota_set->max_mail_size == 0 &&
array_count("a_set->root_sets) == 0) {
pool_unref(&pool);
return 0;
}
quota_set->initialized = TRUE;
*set_r = quota_set;
return 1;
}
void quota_settings_deinit(struct quota_settings **_quota_set)
{
struct quota_settings *quota_set = *_quota_set;
*_quota_set = NULL;
pool_unref("a_set->pool);
}
static void quota_root_deinit(struct quota_root *root)
{
pool_t pool = root->pool;
if (root->limit_set_dict != NULL)
dict_deinit(&root->limit_set_dict);
root->backend.v.deinit(root);
pool_unref(&pool);
}
int quota_root_default_init(struct quota_root *root, const char *args,
const char **error_r)
{
const struct quota_param_parser default_params[] = {
quota_param_hidden,
quota_param_ignoreunlimited,
quota_param_noenforcing,
quota_param_ns,
{.param_name = NULL}
};
return quota_parse_parameters(root, &args, error_r, default_params, TRUE);
}
static int
quota_root_init(struct quota_root_settings *root_set, struct quota *quota,
struct quota_root **root_r, const char **error_r)
{
struct quota_root *root;
root = root_set->backend->v.alloc();
root->pool = pool_alloconly_create("quota root", 512);
root->set = root_set;
root->quota = quota;
root->backend = *root_set->backend;
root->bytes_limit = root_set->default_rule.bytes_limit;
root->count_limit = root_set->default_rule.count_limit;
array_create(&root->quota_module_contexts, root->pool,
sizeof(void *), 10);
if (root->backend.v.init != NULL) {
if (root->backend.v.init(root, root_set->args, error_r) < 0) {
*error_r = t_strdup_printf("%s quota init failed: %s",
root->backend.name, *error_r);
return -1;
}
} else {
if (quota_root_default_init(root, root_set->args, error_r) < 0)
return -1;
}
if (root_set->default_rule.bytes_limit == 0 &&
root_set->default_rule.count_limit == 0 &&
root->disable_unlimited_tracking) {
quota_root_deinit(root);
return 0;
}
*root_r = root;
return 1;
}
int quota_init(struct quota_settings *quota_set, struct mail_user *user,
struct quota **quota_r, const char **error_r)
{
struct quota *quota;
struct quota_root *root;
struct quota_root_settings *const *root_sets;
unsigned int i, count;
const char *error;
int ret;
quota = i_new(struct quota, 1);
quota->user = user;
quota->set = quota_set;
i_array_init("a->roots, 8);
root_sets = array_get("a_set->root_sets, &count);
i_array_init("a->namespaces, count);
for (i = 0; i < count; i++) {
ret = quota_root_init(root_sets[i], quota, &root, &error);
if (ret < 0) {
*error_r = t_strdup_printf("Quota root %s: %s",
root_sets[i]->name, error);
quota_deinit("a);
return -1;
}
if (ret > 0)
array_append("a->roots, &root, 1);
}
*quota_r = quota;
return 0;
}
void quota_deinit(struct quota **_quota)
{
struct quota *quota = *_quota;
struct quota_root *const *roots;
unsigned int i, count;
roots = array_get("a->roots, &count);
for (i = 0; i < count; i++)
quota_root_deinit(roots[i]);
/* deinit quota roots before setting quser->quota=NULL */
*_quota = NULL;
array_free("a->roots);
array_free("a->namespaces);
i_free(quota);
}
static int quota_root_get_rule_limits(struct quota_root *root,
const char *mailbox_name,
uint64_t *bytes_limit_r,
uint64_t *count_limit_r,
bool *ignored_r,
const char **error_r)
{
struct quota_rule *rule;
int64_t bytes_limit, count_limit;
int ret;
*ignored_r = FALSE;
if (!root->set->force_default_rule) {
if (root->backend.v.init_limits != NULL) {
const char *error;
if (root->backend.v.init_limits(root, &error) < 0) {
*error_r = t_strdup_printf(
"Initializing limits failed for quota backend: %s",
error);
return -1;
}
}
}
bytes_limit = root->bytes_limit;
count_limit = root->count_limit;
/* if default rule limits are 0, user has unlimited quota.
ignore any specific quota rules */
if (bytes_limit != 0 || count_limit != 0) {
(void)mail_namespace_find_unalias(root->quota->user->namespaces,
&mailbox_name);
rule = quota_root_rule_find(root->set, mailbox_name);
ret = 1;
} else {
rule = NULL;
ret = 0;
}
if (rule != NULL) {
if (!rule->ignore) {
bytes_limit += rule->bytes_limit;
count_limit += rule->count_limit;
} else {
bytes_limit = 0;
count_limit = 0;
*ignored_r = TRUE;
}
}
*bytes_limit_r = bytes_limit <= 0 ? 0 : bytes_limit;
*count_limit_r = count_limit <= 0 ? 0 : count_limit;
return ret;
}
static bool
quota_is_duplicate_namespace(struct quota *quota, struct mail_namespace *ns)
{
struct mail_namespace *const *namespaces;
unsigned int i, count;
const char *path, *path2;
if (!mailbox_list_get_root_path(ns->list,
MAILBOX_LIST_PATH_TYPE_MAILBOX, &path))
path = NULL;
namespaces = array_get("a->namespaces, &count);
for (i = 0; i < count; i++) {
/* count namespace aliases only once. don't rely only on
alias_for != NULL, because the alias might have been
explicitly added as the wanted quota namespace. */
if (ns->alias_for == namespaces[i] ||
namespaces[i]->alias_for == ns)
continue;
if (path != NULL &&
mailbox_list_get_root_path(namespaces[i]->list,
MAILBOX_LIST_PATH_TYPE_MAILBOX, &path2) &&
strcmp(path, path2) == 0) {
/* duplicate path */
if ((ns->flags & NAMESPACE_FLAG_INBOX_USER) == 0)
return TRUE;
/* this is inbox=yes namespace, but the earlier one
that had the same location was inbox=no. we need to
include the INBOX also in quota calculations, so we
can't just ignore this namespace. but since we've
already called backend's namespace_added(), we can't
just remove it either. so just mark the old one as
unwanted namespace.
an alternative would be to do a bit larger change so
namespaces wouldn't be added until
mail_namespaces_created() hook is called */
i_assert(quota->unwanted_ns == NULL);
quota->unwanted_ns = namespaces[i];
return FALSE;
}
}
return FALSE;
}
void quota_add_user_namespace(struct quota *quota, struct mail_namespace *ns)
{
struct quota_root *const *roots;
struct quota_backend **backends;
unsigned int i, j, count;
/* first check if there already exists a namespace with the exact same
path. we don't want to count them twice. */
if (quota_is_duplicate_namespace(quota, ns))
return;
array_append("a->namespaces, &ns, 1);
roots = array_get("a->roots, &count);
/* @UNSAFE: get different backends into one array */
backends = t_new(struct quota_backend *, count + 1);
for (i = 0; i < count; i++) {
for (j = 0; backends[j] != NULL; j++) {
if (backends[j]->name == roots[i]->backend.name)
break;
}
if (backends[j] == NULL)
backends[j] = &roots[i]->backend;
}
for (i = 0; backends[i] != NULL; i++) {
if (backends[i]->v.namespace_added != NULL)
backends[i]->v.namespace_added(quota, ns);
}
}
void quota_remove_user_namespace(struct mail_namespace *ns)
{
struct quota *quota;
struct mail_namespace *const *namespaces;
unsigned int i, count;
quota = ns->owner != NULL ?
quota_get_mail_user_quota(ns->owner) :
quota_get_mail_user_quota(ns->user);
if (quota == NULL) {
/* no quota for this namespace */
return;
}
namespaces = array_get("a->namespaces, &count);
for (i = 0; i < count; i++) {
if (namespaces[i] == ns) {
array_delete("a->namespaces, i, 1);
break;
}
}
}
struct quota_root_iter *
quota_root_iter_init(struct mailbox *box)
{
struct quota_root_iter *iter;
iter = i_new(struct quota_root_iter, 1);
iter->quota = box->list->ns->owner != NULL ?
quota_get_mail_user_quota(box->list->ns->owner) :
quota_get_mail_user_quota(box->list->ns->user);
iter->box = box;
return iter;
}
bool quota_root_is_namespace_visible(struct quota_root *root,
struct mail_namespace *ns)
{
struct mailbox_list *list = ns->list;
struct mail_storage *storage;
/* this check works as long as there is only one storage per list */
if (mailbox_list_get_storage(&list, "", &storage) == 0 &&
(storage->class_flags & MAIL_STORAGE_CLASS_FLAG_NOQUOTA) != 0)
return FALSE;
if (root->quota->unwanted_ns == ns)
return FALSE;
if (root->ns_prefix != NULL) {
if (root->ns != ns)
return FALSE;
} else {
if (ns->owner == NULL)
return FALSE;
}
return TRUE;
}
static bool
quota_root_is_visible(struct quota_root *root, struct mailbox *box,
bool enforce)
{
if (root->no_enforcing && enforce) {
/* we don't want to include this root in quota enforcing */
return FALSE;
}
if (!quota_root_is_namespace_visible(root, box->list->ns))
return FALSE;
if (array_count(&root->quota->roots) == 1) {
/* a single quota root: don't bother checking further */
return TRUE;
}
return root->backend.v.match_box == NULL ? TRUE :
root->backend.v.match_box(root, box);
}
struct quota_root *quota_root_iter_next(struct quota_root_iter *iter)
{
struct quota_root *const *roots, *root = NULL;
unsigned int count;
if (iter->quota == NULL)
return NULL;
roots = array_get(&iter->quota->roots, &count);
if (iter->i >= count)
return NULL;
for (; iter->i < count; iter->i++) {
if (!quota_root_is_visible(roots[iter->i], iter->box, FALSE))
continue;
root = roots[iter->i];
break;
}
iter->i++;
return root;
}
void quota_root_iter_deinit(struct quota_root_iter **_iter)
{
struct quota_root_iter *iter = *_iter;
*_iter = NULL;
i_free(iter);
}
struct quota_root *quota_root_lookup(struct mail_user *user, const char *name)
{
struct quota *quota;
struct quota_root *const *roots;
unsigned int i, count;
quota = quota_get_mail_user_quota(user);
if (quota == NULL)
return NULL;
roots = array_get("a->roots, &count);
for (i = 0; i < count; i++) {
if (strcmp(roots[i]->set->name, name) == 0)
return roots[i];
}
return NULL;
}
const char *quota_root_get_name(struct quota_root *root)
{
return root->set->name;
}
const char *const *quota_root_get_resources(struct quota_root *root)
{
/* if we haven't checked the quota_over_flag yet, do it now */
quota_over_flag_check_root(root);
return root->backend.v.get_resources(root);
}
bool quota_root_is_hidden(struct quota_root *root)
{
return root->hidden;
}
enum quota_get_result
quota_get_resource(struct quota_root *root, const char *mailbox_name,
const char *name, uint64_t *value_r, uint64_t *limit_r,
const char **error_r)
{
const char *error;
uint64_t bytes_limit, count_limit;
bool ignored, kilobytes = FALSE;
enum quota_get_result ret;
*value_r = *limit_r = 0;
if (strcmp(name, QUOTA_NAME_STORAGE_KILOBYTES) == 0) {
name = QUOTA_NAME_STORAGE_BYTES;
kilobytes = TRUE;
}
/* Get the value first. This call may also update quota limits if
they're defined externally. */
ret = root->backend.v.get_resource(root, name, value_r, &error);
if (ret == QUOTA_GET_RESULT_UNLIMITED)
i_panic("Quota backend %s returned QUOTA_GET_RESULT_UNLIMITED "
"while getting resource %s from box %s",
root->backend.name, name, mailbox_name);
else if (ret != QUOTA_GET_RESULT_LIMITED) {
*error_r = t_strdup_printf(
"quota-%s: %s", root->set->backend->name, error);
return ret;
}
if (quota_root_get_rule_limits(root, mailbox_name,
&bytes_limit, &count_limit,
&ignored, &error) < 0) {
*error_r = t_strdup_printf(
"Failed to get quota root rule limits for mailbox %s: %s",
mailbox_name, error);
return QUOTA_GET_RESULT_INTERNAL_ERROR;
}
if (strcmp(name, QUOTA_NAME_STORAGE_BYTES) == 0)
*limit_r = bytes_limit;
else if (strcmp(name, QUOTA_NAME_MESSAGES) == 0)
*limit_r = count_limit;
else
*limit_r = 0;
if (kilobytes) {
*value_r = (*value_r + 1023) / 1024;
*limit_r = (*limit_r + 1023) / 1024;
}
return *limit_r == 0 ? QUOTA_GET_RESULT_UNLIMITED : QUOTA_GET_RESULT_LIMITED;
}
int quota_set_resource(struct quota_root *root, const char *name,
uint64_t value, const char **error_r)
{
struct dict_transaction_context *trans;
const char *key, *error;
if (root->set->limit_set == NULL) {
*error_r = MAIL_ERRSTR_NO_PERMISSION;
return -1;
}
if (strcasecmp(name, QUOTA_NAME_STORAGE_KILOBYTES) == 0)
key = "storage";
else if (strcasecmp(name, QUOTA_NAME_STORAGE_BYTES) == 0)
key = "bytes";
else if (strcasecmp(name, QUOTA_NAME_MESSAGES) == 0)
key = "messages";
else {
*error_r = t_strdup_printf("Unsupported resource name: %s", name);
return -1;
}
if (root->limit_set_dict == NULL) {
struct dict_settings set;
i_zero(&set);
set.username = root->quota->user->username;
set.base_dir = root->quota->user->set->base_dir;
if (mail_user_get_home(root->quota->user, &set.home_dir) <= 0)
set.home_dir = NULL;
if (dict_init(root->set->limit_set, &set,
&root->limit_set_dict, error_r) < 0)
return -1;
}
trans = dict_transaction_begin(root->limit_set_dict);
key = t_strdup_printf(QUOTA_LIMIT_SET_PATH"%s", key);
dict_set(trans, key, dec2str(value));
if (dict_transaction_commit(&trans, &error) < 0) {
i_error("dict_transaction_commit() failed: %s", error);
*error_r = "Internal quota limit update error";
return -1;
}
return 0;
}
struct quota_transaction_context *quota_transaction_begin(struct mailbox *box)
{
struct quota_transaction_context *ctx;
struct quota_root *const *rootp;
const struct quota_rule *rule;
const char *mailbox_name;
ctx = i_new(struct quota_transaction_context, 1);
ctx->quota = box->list->ns->owner != NULL ?
quota_get_mail_user_quota(box->list->ns->owner) :
quota_get_mail_user_quota(box->list->ns->user);
i_assert(ctx->quota != NULL);
ctx->box = box;
ctx->bytes_ceil = (uint64_t)-1;
ctx->bytes_ceil2 = (uint64_t)-1;
ctx->count_ceil = (uint64_t)-1;
mailbox_name = mailbox_get_vname(box);
(void)mail_namespace_find_unalias(box->storage->user->namespaces,
&mailbox_name);
ctx->auto_updating = TRUE;
array_foreach(&ctx->quota->roots, rootp) {
if (!quota_root_is_visible(*rootp, ctx->box, FALSE))
continue;
rule = quota_root_rule_find((*rootp)->set, mailbox_name);
if (rule != NULL && rule->ignore) {
/* This mailbox isn't included in quota. This means
it's also not included in quota_warnings, so make
sure it's fully ignored. */
continue;
}
/* If there are reverse quota_warnings, we'll need to track
how many bytes were expunged even with auto_updating roots.
(An alternative could be to get the current quota usage
before and after the expunges, but that's more complicated
and probably isn't any better.) */
if (!(*rootp)->auto_updating ||
(*rootp)->set->have_reverse_warnings)
ctx->auto_updating = FALSE;
}
if (box->storage->user->dsyncing) {
/* ignore quota for dsync */
ctx->limits_set = TRUE;
}
return ctx;
}
int quota_transaction_set_limits(struct quota_transaction_context *ctx,
enum quota_get_result *error_result_r,
const char **error_r)
{
struct quota_root *const *roots;
const char *mailbox_name, *error;
unsigned int i, count;
uint64_t bytes_limit, count_limit, current, limit, diff;
bool use_grace, ignored;
enum quota_get_result ret;
if (ctx->limits_set)
return 0;
ctx->limits_set = TRUE;
mailbox_name = mailbox_get_vname(ctx->box);
/* use quota_grace only for LDA/LMTP */
use_grace = (ctx->box->flags & MAILBOX_FLAG_POST_SESSION) != 0;
ctx->no_quota_updates = TRUE;
/* find the lowest quota limits from all roots and use them */
roots = array_get(&ctx->quota->roots, &count);
for (i = 0; i < count; i++) {
if (!quota_root_is_visible(roots[i], ctx->box, TRUE))
continue;
if (quota_root_get_rule_limits(roots[i], mailbox_name,
&bytes_limit, &count_limit,
&ignored, &error) < 0) {
ctx->failed = TRUE;
*error_result_r = QUOTA_GET_RESULT_INTERNAL_ERROR;
*error_r = t_strdup_printf(
"Failed to get quota root rule limits for %s: %s",
mailbox_name, error);
return -1;
}
if (!ignored)
ctx->no_quota_updates = FALSE;
if (bytes_limit > 0) {
ret = quota_get_resource(roots[i], mailbox_name,
QUOTA_NAME_STORAGE_BYTES,
¤t, &limit, &error);
if (ret == QUOTA_GET_RESULT_LIMITED) {
if (limit <= current) {
/* over quota */
ctx->bytes_ceil = 0;
ctx->bytes_ceil2 = 0;
diff = current - limit;
if (ctx->bytes_over < diff)
ctx->bytes_over = diff;
} else {
diff = limit - current;
if (ctx->bytes_ceil2 > diff)
ctx->bytes_ceil2 = diff;
diff += !use_grace ? 0 :
roots[i]->set->last_mail_max_extra_bytes;
if (ctx->bytes_ceil > diff)
ctx->bytes_ceil = diff;
}
} else if (ret <= QUOTA_GET_RESULT_INTERNAL_ERROR) {
ctx->failed = TRUE;
*error_result_r = ret;
*error_r = t_strdup_printf(
"Failed to get quota resource "
QUOTA_NAME_STORAGE_BYTES" for %s: %s",
mailbox_name, error);
return -1;
}
}
if (count_limit > 0) {
ret = quota_get_resource(roots[i], mailbox_name,
QUOTA_NAME_MESSAGES,
¤t, &limit, &error);
if (ret == QUOTA_GET_RESULT_LIMITED) {
if (limit <= current) {
/* over quota */
ctx->count_ceil = 0;
diff = current - limit;
if (ctx->count_over < diff)
ctx->count_over = diff;
} else {
diff = limit - current;
if (ctx->count_ceil > diff)
ctx->count_ceil = diff;
}
} else if (ret <= QUOTA_GET_RESULT_INTERNAL_ERROR) {
ctx->failed = TRUE;
*error_result_r = ret;
*error_r = t_strdup_printf(
"Failed to get quota resource "
QUOTA_NAME_MESSAGES" for %s: %s",