index/shared/shared-storage.c

	shared-storage.c revision 1a5573ebc32fae2fe576ec544e1781323c1db609
e59faf65ce864fe95dc00f5d52b8323cdbd0608aTimo Sirainen/* Copyright (c) 2008-2014 Dovecot authors, see the included COPYING file */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include "lib.h"
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen#include "array.h"
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include "str.h"
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include "ioloop.h"
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include "var-expand.h"
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include "index-storage.h"
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include "mailbox-list-private.h"
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include "fail-mail-storage.h"
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include "shared-storage.h"
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include <stdlib.h>
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen#include <ctype.h>
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainenextern struct mail_storage shared_storage;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainenstatic struct mail_storage *shared_storage_alloc(void)
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen{
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    struct shared_storage *storage;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    pool_t pool;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    pool = pool_alloconly_create("shared storage", 1024);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    storage = p_new(pool, struct shared_storage, 1);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    storage->storage = shared_storage;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    storage->storage.pool = pool;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    return &storage->storage;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen}
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainenstatic int
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainenshared_storage_create(struct mail_storage *_storage, struct mail_namespace *ns,
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen              const char **error_r)
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen{
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen    struct shared_storage *storage = (struct shared_storage *)_storage;
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen    struct mail_storage *storage_class;
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen    const char *driver, *p;
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen    char *wildcardp, key;
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen    bool have_username;
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen    /* location must begin with the actual mailbox driver */
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen    p = strchr(ns->set->location, ':');
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen    if (p == NULL) {
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen        *error_r = "Shared mailbox location not prefixed with driver";
e5fd6dfd0a492e4708d4dbb7971d7fc5d7b8fd85Timo Sirainen        return -1;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }
e5fd6dfd0a492e4708d4dbb7971d7fc5d7b8fd85Timo Sirainen    driver = t_strdup_until(ns->set->location, p);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    storage->location = p_strdup(_storage->pool, ns->set->location);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    storage->unexpanded_location =
d22301419109ed4a38351715e6760011421dadecTimo Sirainen        p_strdup(_storage->pool, ns->unexpanded_set->location);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    storage->storage_class_name = p_strdup(_storage->pool, driver);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    storage_class = mail_user_get_storage_class(_storage->user, driver);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    if (storage_class != NULL)
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        _storage->class_flags = storage_class->class_flags;
3b32bc12710240f86465a00fbb2bd1ef030e6c40Timo Sirainen    else if (strcmp(driver, "auto") != 0) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        *error_r = t_strconcat("Unknown shared storage driver: ",
d22301419109ed4a38351715e6760011421dadecTimo Sirainen                       driver, NULL);
d22301419109ed4a38351715e6760011421dadecTimo Sirainen        return -1;
d22301419109ed4a38351715e6760011421dadecTimo Sirainen    }
d22301419109ed4a38351715e6760011421dadecTimo Sirainen
d22301419109ed4a38351715e6760011421dadecTimo Sirainen    wildcardp = strchr(ns->prefix, '%');
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    if (wildcardp == NULL) {
e5fd6dfd0a492e4708d4dbb7971d7fc5d7b8fd85Timo Sirainen        *error_r = "Shared namespace prefix doesn't contain %";
d22301419109ed4a38351715e6760011421dadecTimo Sirainen        return -1;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    storage->ns_prefix_pattern = p_strdup(_storage->pool, wildcardp);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
d22301419109ed4a38351715e6760011421dadecTimo Sirainen    have_username = FALSE;
d22301419109ed4a38351715e6760011421dadecTimo Sirainen    for (p = storage->ns_prefix_pattern; *p != '\0'; p++) {
d22301419109ed4a38351715e6760011421dadecTimo Sirainen        if (*p != '%')
d22301419109ed4a38351715e6760011421dadecTimo Sirainen            continue;
d22301419109ed4a38351715e6760011421dadecTimo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        key = p[1];
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        if (key == 'u' || key == 'n')
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            have_username = TRUE;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        else if (key != '%' && key != 'd')
d22301419109ed4a38351715e6760011421dadecTimo Sirainen            break;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }
d22301419109ed4a38351715e6760011421dadecTimo Sirainen    if (*p != '\0') {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        *error_r = "Shared namespace prefix contains unknown variables";
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        return -1;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen    if (!have_username) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        *error_r = "Shared namespace prefix doesn't contain %u or %n";
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        return -1;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    if (p[-1] != mail_namespace_get_sep(ns) &&
d22301419109ed4a38351715e6760011421dadecTimo Sirainen        (ns->flags & (NAMESPACE_FLAG_LIST_PREFIX |
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen              NAMESPACE_FLAG_LIST_CHILDREN)) != 0) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        *error_r = "Shared namespace prefix doesn't end with hierarchy separator";
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        return -1;
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen    }
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen    /* truncate prefix after the above checks are done, so they can log
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen       the full prefix in error conditions */
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen    *wildcardp = '\0';
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen    ns->prefix_len = strlen(ns->prefix);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    return 0;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen}
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainenstatic void
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainenshared_storage_get_list_settings(const struct mail_namespace *ns ATTR_UNUSED,
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                 struct mailbox_list_settings *set)
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen{
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    set->layout = "shared";
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen}
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainenstatic void
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainenget_nonexistent_user_location(struct shared_storage *storage,
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                  const char *username, string_t *location)
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen{
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    /* user wasn't found. we'll still need to create the storage
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen       to avoid exposing which users exist and which don't. */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    str_append(location, storage->storage_class_name);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    str_append_c(location, ':');
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    /* use a reachable but nonexistent path as the mail root directory */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    str_append(location, storage->storage.user->set->base_dir);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    str_append(location, "/user-not-found/");
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    str_append(location, username);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen}
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainenstatic bool shared_namespace_exists(struct mail_namespace *ns)
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen{
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    const char *path;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    struct stat st;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    path = mailbox_list_get_root_forced(ns->list, MAILBOX_LIST_PATH_TYPE_DIR);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    if (path == NULL) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        /* we can't know if this exists */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        return TRUE;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    return stat(path, &st) == 0;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen}
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainenint shared_storage_get_namespace(struct mail_namespace **_ns,
ca98d6a1bbe73499da758a36bfab2963375c8d06Timo Sirainen                 const char **_name)
ca98d6a1bbe73499da758a36bfab2963375c8d06Timo Sirainen{
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    struct mail_storage *_storage = (*_ns)->storage;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    struct mailbox_list *list = (*_ns)->list;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    struct shared_storage *storage = (struct shared_storage *)_storage;
547e916f4e6f01af682f8b6e032c337f2a699364Timo Sirainen    struct mail_user *user = _storage->user;
547e916f4e6f01af682f8b6e032c337f2a699364Timo Sirainen    static struct var_expand_table static_tab[] = {
547e916f4e6f01af682f8b6e032c337f2a699364Timo Sirainen        { 'u', NULL, "user" },
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        { 'n', NULL, "username" },
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        { 'd', NULL, "domain" },
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        { 'h', NULL, "home" },
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        { '\0', NULL, NULL }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    };
46219292a55094fa49aae33eee681ed075d30e17Timo Sirainen    struct var_expand_table *tab;
46219292a55094fa49aae33eee681ed075d30e17Timo Sirainen    struct mail_namespace *new_ns, *ns = *_ns;
46219292a55094fa49aae33eee681ed075d30e17Timo Sirainen    struct mail_namespace_settings *ns_set, *unexpanded_ns_set;
46219292a55094fa49aae33eee681ed075d30e17Timo Sirainen    struct mail_user *owner;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    const char *domain = NULL, *username = NULL, *userdomain = NULL;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    const char *name, *p, *next, **dest, *error;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    string_t *prefix, *location;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    char ns_sep = mail_namespace_get_sep(ns);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    int ret;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    p = storage->ns_prefix_pattern;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    for (name = *_name; *p != '\0';) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        if (*p != '%') {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            if (*p != *name)
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                break;
ca98d6a1bbe73499da758a36bfab2963375c8d06Timo Sirainen            p++; name++;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            continue;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        switch (*++p) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        case 'd':
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            dest = &domain;
46219292a55094fa49aae33eee681ed075d30e17Timo Sirainen            break;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        case 'n':
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            dest = &username;
ca98d6a1bbe73499da758a36bfab2963375c8d06Timo Sirainen            break;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        case 'u':
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            dest = &userdomain;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            break;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        default:
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            /* we checked this already above */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            i_unreached();
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        p++;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        next = strchr(name, *p != '\0' ? *p : ns_sep);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        if (next == NULL) {
888ab4e17f7441b4dcca4a01886d055b57f4586dTimo Sirainen            *dest = name;
888ab4e17f7441b4dcca4a01886d055b57f4586dTimo Sirainen            name = "";
888ab4e17f7441b4dcca4a01886d055b57f4586dTimo Sirainen            break;
888ab4e17f7441b4dcca4a01886d055b57f4586dTimo Sirainen        }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        *dest = t_strdup_until(name, next);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        name = next;
5b62dea2f88165f3f4d87bba9011343f3ff415ffTimo Sirainen    }
5b62dea2f88165f3f4d87bba9011343f3ff415ffTimo Sirainen    if (*p != '\0') {
5b62dea2f88165f3f4d87bba9011343f3ff415ffTimo Sirainen        if (*name == '\0' ||
5b62dea2f88165f3f4d87bba9011343f3ff415ffTimo Sirainen            (name[1] == '\0' && *name == ns_sep)) {
5b62dea2f88165f3f4d87bba9011343f3ff415ffTimo Sirainen            /* trying to open <prefix>/<user> mailbox */
fbd918f47f591f8084fd52b207ef29515ddd11b9Timo Sirainen            name = "INBOX";
fbd918f47f591f8084fd52b207ef29515ddd11b9Timo Sirainen        } else {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            mailbox_list_set_critical(list,
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                    "Invalid namespace prefix %s vs %s",
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                    storage->ns_prefix_pattern, *_name);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            return -1;
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen        }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    /* successfully matched the name. */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    if (userdomain != NULL) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        /* user@domain given */
4b2a4c8c762e3eaddf7fd2abfe7d4cca6e5e3fd8Timo Sirainen        domain = strchr(userdomain, '@');
fbd918f47f591f8084fd52b207ef29515ddd11b9Timo Sirainen        if (domain == NULL)
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            username = userdomain;
fbd918f47f591f8084fd52b207ef29515ddd11b9Timo Sirainen        else {
fbd918f47f591f8084fd52b207ef29515ddd11b9Timo Sirainen            username = t_strdup_until(userdomain, domain);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            domain++;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    } else if (username == NULL) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        /* trying to open namespace "shared/domain"
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen           namespace prefix. */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        mailbox_list_set_error(list, MAIL_ERROR_NOTFOUND,
d22301419109ed4a38351715e6760011421dadecTimo Sirainen                       T_MAIL_ERR_MAILBOX_NOT_FOUND(*_name));
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        return -1;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    } else {
5539418f448cd9bb38fc085e654861479dd1130bTimo Sirainen        if (domain == NULL) {
5539418f448cd9bb38fc085e654861479dd1130bTimo Sirainen            /* no domain given, use ours (if we have one) */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            domain = strchr(user->username, '@');
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            if (domain != NULL) domain++;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        userdomain = domain == NULL ? username :
7bafda1813454621e03615e83d55bccfa7cc56bdTimo Sirainen            t_strconcat(username, "@", domain, NULL);
7bafda1813454621e03615e83d55bccfa7cc56bdTimo Sirainen    }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    if (*userdomain == '\0') {
7bafda1813454621e03615e83d55bccfa7cc56bdTimo Sirainen        mailbox_list_set_error(list, MAIL_ERROR_PARAMS,
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                       "Empty username doesn't exist");
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        return -1;
bca919b207e27d0d08b431bdb0f2ac099ef8b512Timo Sirainen    }
ac26a4607cb12b156f6a42f1ead2881bedd43d94Timo Sirainen
dca6d617a23e3f93af3b8df59acb46478179fe55Timo Sirainen    /* expand the namespace prefix and see if it already exists.
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen       this should normally happen only when the mailbox is being opened */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    tab = t_malloc(sizeof(static_tab));
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    memcpy(tab, static_tab, sizeof(static_tab));
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    tab[0].value = userdomain;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    tab[1].value = username;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    tab[2].value = domain;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    prefix = t_str_new(128);
7bafda1813454621e03615e83d55bccfa7cc56bdTimo Sirainen    str_append(prefix, ns->prefix);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    var_expand(prefix, storage->ns_prefix_pattern, tab);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    *_ns = mail_namespace_find_prefix(user->namespaces, str_c(prefix));
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    if (*_ns != NULL) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        *_name = mailbox_list_get_storage_name(ns->list,
438f12d7a776da695019114884b48188d94613efTimo Sirainen                t_strconcat(ns->prefix, name, NULL));
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        return 0;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }
61b0637759146621cbb7edcbd0b03a71cfd66dfeTimo Sirainen
2649b237dd4690575e75a30b2bf3b39ebd37b835Timo Sirainen    owner = mail_user_alloc(userdomain, user->set_info,
fbd918f47f591f8084fd52b207ef29515ddd11b9Timo Sirainen                user->unexpanded_set);
fbd918f47f591f8084fd52b207ef29515ddd11b9Timo Sirainen    owner->autocreated = TRUE;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    if (mail_user_init(owner, &error) < 0) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        if (!owner->nonexistent) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            mailbox_list_set_critical(list,
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                "Couldn't create namespace '%s' for user %s: %s",
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                ns->prefix, userdomain, error);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            mail_user_unref(&owner);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            return -1;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        ret = 0;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    } else if (!var_has_key(storage->location, 'h', "home")) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        ret = 1;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    } else {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        /* we'll need to look up the user's home directory */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        if ((ret = mail_user_get_home(owner, &tab[3].value)) < 0) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            mailbox_list_set_critical(list, "Namespace '%s': "
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                "Could not lookup home for user %s",
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen                ns->prefix, userdomain);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            mail_user_unref(&owner);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            return -1;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    /* create the new namespace */
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    new_ns = i_new(struct mail_namespace, 1);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    new_ns->refcount = 1;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    new_ns->type = MAIL_NAMESPACE_TYPE_SHARED;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    new_ns->user = user;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    new_ns->prefix = i_strdup(str_c(prefix));
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    new_ns->owner = owner;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    new_ns->flags = (NAMESPACE_FLAG_SUBSCRIPTIONS & ns->flags) |
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        NAMESPACE_FLAG_LIST_PREFIX | NAMESPACE_FLAG_HIDDEN |
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        NAMESPACE_FLAG_AUTOCREATED | NAMESPACE_FLAG_INBOX_ANY;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    new_ns->mail_set = _storage->set;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    i_array_init(&new_ns->all_storages, 2);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    location = t_str_new(256);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    if (ret > 0)
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        var_expand(location, storage->location, tab);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    else {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        get_nonexistent_user_location(storage, userdomain, location);
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        new_ns->flags |= NAMESPACE_FLAG_UNUSABLE;
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen        if (ns->user->mail_debug) {
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen            i_debug("shared: Tried to access mails of "
5b62dea2f88165f3f4d87bba9011343f3ff415ffTimo Sirainen                "nonexistent user %s", userdomain);
5b62dea2f88165f3f4d87bba9011343f3ff415ffTimo Sirainen        }
1ac7c8e9040e0d0b7e9f849e45b94bfe919595a9Timo Sirainen    }

    ns_set = p_new(user->pool, struct mail_namespace_settings, 1);
    ns_set->type = "shared";
    ns_set->separator = p_strdup_printf(user->pool, "%c", ns_sep);
    ns_set->prefix = new_ns->prefix;
    ns_set->location = p_strdup(user->pool, str_c(location));
    ns_set->hidden = TRUE;
    ns_set->list = "yes";
    new_ns->set = ns_set;

    unexpanded_ns_set =
        p_new(user->pool, struct mail_namespace_settings, 1);
    *unexpanded_ns_set = *ns_set;
    unexpanded_ns_set->location =
        p_strdup(user->pool, storage->unexpanded_location);
    new_ns->unexpanded_set = unexpanded_ns_set;

    /* We need to create a prefix="" namespace for the owner */
    if (mail_namespaces_init_location(owner, str_c(location), &error) < 0) {
        /* owner gets freed by namespace deinit */
        mail_namespace_destroy(new_ns);
        return -1;
    }

    if (mail_storage_create(new_ns, NULL, _storage->flags |
                MAIL_STORAGE_FLAG_NO_AUTOVERIFY, &error) < 0) {
        mailbox_list_set_critical(list, "Namespace '%s': %s",
                      new_ns->prefix, error);
        /* owner gets freed by namespace deinit */
        mail_namespace_destroy(new_ns);
        return -1;
    }
    if ((new_ns->flags & NAMESPACE_FLAG_UNUSABLE) == 0 &&
        !shared_namespace_exists(new_ns)) {
        /* this user doesn't have a usable storage */
        new_ns->flags |= NAMESPACE_FLAG_UNUSABLE;
    }
    /* mark the shared namespace root as usable, since it now has
       child namespaces */
    ns->flags |= NAMESPACE_FLAG_USABLE;
    *_name = mailbox_list_get_storage_name(new_ns->list,
                t_strconcat(new_ns->prefix, name, NULL));
    *_ns = new_ns;
    if (_storage->class_flags == 0) {
        /* flags are unset if we were using "auto" storage */
        _storage->class_flags =
            mail_namespace_get_default_storage(new_ns)->class_flags;
    }

    mail_user_add_namespace(user, &new_ns);
    return 0;
}

struct mail_storage shared_storage = {
    .name = MAIL_SHARED_STORAGE_NAME,
    .class_flags = 0, /* unknown at this point */

    .v = {
        NULL,
        shared_storage_alloc,
        shared_storage_create,
        index_storage_destroy,
        NULL,
        shared_storage_get_list_settings,
        NULL,
        fail_mailbox_alloc,
        NULL
    }
};