virtual-sync.c revision a406615fbcef37b1d12f0be95a70abf23238c5ef
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen/* Copyright (c) 2008-2014 Dovecot authors, see the included COPYING file */
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen#include "lib.h"
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen#include "array.h"
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen#include "bsearch-insert-pos.h"
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen#include "ioloop.h"
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen#include "str.h"
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen#include "mail-index-modseq.h"
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen#include "mail-search-build.h"
6d2b3ce2c6ef62334985ece4f0ab8b154e0e9560Timo Sirainen#include "mailbox-search-result-private.h"
c6335901c67a4c9365319190a111a2168f3b06f5Timo Sirainen#include "index-sync-private.h"
c6335901c67a4c9365319190a111a2168f3b06f5Timo Sirainen#include "index-search-result.h"
c6335901c67a4c9365319190a111a2168f3b06f5Timo Sirainen#include "virtual-storage.h"
01230de017cd273de41143d88e9c18df1243ae8aTimo Sirainen
01230de017cd273de41143d88e9c18df1243ae8aTimo Sirainen#include <stdlib.h>
047c00cd3f7f403672f81569413669238df8c15aTimo Sirainen
047c00cd3f7f403672f81569413669238df8c15aTimo Sirainenstruct virtual_add_record {
047c00cd3f7f403672f81569413669238df8c15aTimo Sirainen struct virtual_mail_index_record rec;
047c00cd3f7f403672f81569413669238df8c15aTimo Sirainen time_t received_date;
cf0ad1a0bddb0787f3d7b408a96d721a8b2a98a3Timo Sirainen};
cf0ad1a0bddb0787f3d7b408a96d721a8b2a98a3Timo Sirainen
cf0ad1a0bddb0787f3d7b408a96d721a8b2a98a3Timo Sirainenstruct virtual_sync_mail {
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen uint32_t vseq;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen struct virtual_mail_index_record vrec;
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen};
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainenstruct virtual_sync_context {
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen struct virtual_mailbox *mbox;
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen struct mail_index_sync_ctx *index_sync_ctx;
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen struct mail_index *index;
7487ff578435377bbeefffdbfb78ca09ed1292dfTimo Sirainen struct mail_index_view *sync_view;
89237470342ea6d4bbdf4cff9764037cfb3f6f45Timo Sirainen struct mail_index_transaction *trans;
89237470342ea6d4bbdf4cff9764037cfb3f6f45Timo Sirainen const char *const *kw_all;
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen /* messages expunged within this sync */
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen ARRAY_TYPE(seq_range) sync_expunges;
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen ARRAY(struct virtual_add_record) all_adds;
4d4d6d4745682790c20d759ba93dbea46b812c5dTimo Sirainen enum mailbox_sync_flags flags;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen uint32_t uid_validity;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen unsigned int ext_header_changed:1;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen unsigned int ext_header_rewrite:1;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen unsigned int expunge_removed:1;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen unsigned int index_broken:1;
a3fe8c0c54d87822f4b4f8f0d10caac611861b2bTimo Sirainen};
578ef2538ccf42e2a48234c24a8b709397101d88Timo Sirainen
578ef2538ccf42e2a48234c24a8b709397101d88Timo Sirainenstatic void virtual_sync_set_uidvalidity(struct virtual_sync_context *ctx)
578ef2538ccf42e2a48234c24a8b709397101d88Timo Sirainen{
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen uint32_t uid_validity = ioloop_time;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen mail_index_update_header(ctx->trans,
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen offsetof(struct mail_index_header, uid_validity),
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen &uid_validity, sizeof(uid_validity), TRUE);
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen ctx->uid_validity = uid_validity;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen}
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainenstatic void virtual_sync_external_flags(struct virtual_sync_context *ctx,
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen struct virtual_backend_box *bbox,
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen uint32_t vseq, uint32_t real_uid)
e0740628f6ca05f4bc79a9d8a90b650f4d38d4d0Timo Sirainen{
e0740628f6ca05f4bc79a9d8a90b650f4d38d4d0Timo Sirainen enum mail_flags flags;
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen const char *const *kw_names;
3f603ef00e35fca21605afa0ad8d76e94fee2b96Timo Sirainen struct mail_keywords *keywords;
3f603ef00e35fca21605afa0ad8d76e94fee2b96Timo Sirainen
3f603ef00e35fca21605afa0ad8d76e94fee2b96Timo Sirainen if (!mail_set_uid(bbox->sync_mail, real_uid)) {
3f603ef00e35fca21605afa0ad8d76e94fee2b96Timo Sirainen i_panic("UID %u lost unexpectedly from %s",
6fdfa4d4cf14d1d7764d7faa8258f112e39c8dbeTimo Sirainen real_uid, bbox->box->name);
6fdfa4d4cf14d1d7764d7faa8258f112e39c8dbeTimo Sirainen }
6fdfa4d4cf14d1d7764d7faa8258f112e39c8dbeTimo Sirainen
6fdfa4d4cf14d1d7764d7faa8258f112e39c8dbeTimo Sirainen /* copy flags */
6fdfa4d4cf14d1d7764d7faa8258f112e39c8dbeTimo Sirainen flags = mail_get_flags(bbox->sync_mail);
3f603ef00e35fca21605afa0ad8d76e94fee2b96Timo Sirainen mail_index_update_flags(ctx->trans, vseq, MODIFY_REPLACE, flags);
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen /* copy keywords */
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen kw_names = mail_get_keywords(bbox->sync_mail);
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen keywords = mail_index_keywords_create(ctx->index, kw_names);
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen mail_index_update_keywords(ctx->trans, vseq, MODIFY_REPLACE, keywords);
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen mail_index_keywords_unref(&keywords);
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen}
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainenstatic int virtual_sync_mail_cmp(const void *p1, const void *p2)
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen{
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen const struct virtual_sync_mail *m1 = p1, *m2 = p2;
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen if (m1->vrec.mailbox_id < m2->vrec.mailbox_id)
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen return -1;
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen if (m1->vrec.mailbox_id > m2->vrec.mailbox_id)
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen return 1;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen if (m1->vrec.real_uid < m2->vrec.real_uid)
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen return -1;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen if (m1->vrec.real_uid > m2->vrec.real_uid)
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen return 1;
b2d562f9c7fd13f9a16e9b3bcee904630b80b1feTimo Sirainen /* broken */
b2d562f9c7fd13f9a16e9b3bcee904630b80b1feTimo Sirainen return 0;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen}
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainenstatic void
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainenvirtual_backend_box_sync_mail_set(struct virtual_backend_box *bbox)
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen{
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen struct mailbox_transaction_context *trans;
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen
6c2ce1d5bf17b21e804a079eb0f973b7ab83e0d8Timo Sirainen if (bbox->sync_mail == NULL) {
6c2ce1d5bf17b21e804a079eb0f973b7ab83e0d8Timo Sirainen trans = mailbox_transaction_begin(bbox->box, 0);
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen bbox->sync_mail = mail_alloc(trans, 0, NULL);
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen }
d176f84ce5ca2073f4dfbafb457b9c74f6bf0d76Timo Sirainen}
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainenstatic void
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainenvirtual_backend_box_sync_mail_unset(struct virtual_backend_box *bbox)
8d3278a82b964217d95c340ec6f82037cdc59d19Timo Sirainen{
struct mailbox_transaction_context *trans;
if (bbox->sync_mail != NULL) {
trans = bbox->sync_mail->transaction;
mail_free(&bbox->sync_mail);
(void)mailbox_transaction_commit(&trans);
}
}
static int bbox_mailbox_id_cmp(struct virtual_backend_box *const *b1,
struct virtual_backend_box *const *b2)
{
if ((*b1)->mailbox_id < (*b2)->mailbox_id)
return -1;
if ((*b1)->mailbox_id > (*b2)->mailbox_id)
return 1;
return 0;
}
static int
virtual_sync_get_backend_box(struct virtual_sync_context *ctx, const char *name,
struct virtual_backend_box **bbox_r)
{
*bbox_r = virtual_backend_box_lookup_name(ctx->mbox, name);
if (*bbox_r != NULL || !ctx->mbox->sync_initialized)
return 0;
/* another process just added a new mailbox.
we can't handle this currently. */
ctx->mbox->inconsistent = TRUE;
mail_storage_set_error(ctx->mbox->box.storage, MAIL_ERROR_TEMP,
"Backend mailbox added by another session. "
"Reopen the virtual mailbox.");
return -1;
}
static int virtual_sync_ext_header_read(struct virtual_sync_context *ctx)
{
const char *box_path = mailbox_get_path(&ctx->mbox->box);
const struct virtual_mail_index_header *ext_hdr;
const struct mail_index_header *hdr;
const struct virtual_mail_index_mailbox_record *mailboxes;
struct virtual_backend_box *bbox, **bboxes;
const void *ext_data;
size_t ext_size;
unsigned int i, count, ext_name_offset, ext_mailbox_count;
uint32_t prev_mailbox_id;
int ret = 1;
hdr = mail_index_get_header(ctx->sync_view);
mail_index_get_header_ext(ctx->sync_view, ctx->mbox->virtual_ext_id,
&ext_data, &ext_size);
ext_hdr = ext_data;
if (ctx->mbox->sync_initialized &&
ctx->mbox->prev_uid_validity == hdr->uid_validity &&
ext_size >= sizeof(*ext_hdr) &&
ctx->mbox->prev_change_counter == ext_hdr->change_counter) {
/* fully refreshed */
return 1;
}
ctx->mbox->prev_uid_validity = hdr->uid_validity;
if (ext_hdr == NULL ||
ctx->mbox->search_args_crc32 != ext_hdr->search_args_crc32) {
mailboxes = NULL;
ext_name_offset = 0;
ext_mailbox_count = 0;
} else {
ctx->mbox->prev_change_counter = ext_hdr->change_counter;
mailboxes = (const void *)(ext_hdr + 1);
ext_name_offset = sizeof(*ext_hdr) +
ext_hdr->mailbox_count * sizeof(*mailboxes);
if (ext_name_offset >= ext_size ||
ext_hdr->mailbox_count > INT_MAX/sizeof(*mailboxes)) {
i_error("virtual index %s: Broken mailbox_count header",
box_path);
ctx->index_broken = TRUE;
ext_mailbox_count = 0;
ret = 0;
} else {
ext_mailbox_count = ext_hdr->mailbox_count;
}
}
/* update mailbox backends */
prev_mailbox_id = 0;
for (i = 0; i < ext_mailbox_count; i++) {
if (mailboxes[i].id > ext_hdr->highest_mailbox_id ||
mailboxes[i].id <= prev_mailbox_id) {
i_error("virtual index %s: Broken mailbox id",
box_path);
break;
}
if (mailboxes[i].name_len == 0 ||
mailboxes[i].name_len > ext_size) {
i_error("virtual index %s: Broken mailbox name_len",
box_path);
break;
}
if (ext_name_offset + mailboxes[i].name_len > ext_size) {
i_error("virtual index %s: Broken mailbox list",
box_path);
break;
}
T_BEGIN {
const unsigned char *nameptr;
const char *name;
nameptr = CONST_PTR_OFFSET(ext_data, ext_name_offset);
name = t_strndup(nameptr, mailboxes[i].name_len);
if (virtual_sync_get_backend_box(ctx, name, &bbox) < 0)
ret = -1;
} T_END;
if (bbox == NULL) {
if (ret < 0)
return -1;
/* mailbox no longer exists. */
ret = 0;
} else {
bbox->mailbox_id = mailboxes[i].id;
bbox->sync_uid_validity = mailboxes[i].uid_validity;
bbox->ondisk_highest_modseq =
bbox->sync_highest_modseq =
mailboxes[i].highest_modseq;
bbox->sync_next_uid = mailboxes[i].next_uid;
bbox->sync_mailbox_idx = i;
}
ext_name_offset += mailboxes[i].name_len;
prev_mailbox_id = mailboxes[i].id;
}
if (i < ext_mailbox_count) {
ctx->index_broken = TRUE;
ret = 0;
}
ctx->mbox->highest_mailbox_id = ext_hdr == NULL ? 0 :
ext_hdr->highest_mailbox_id;
ctx->mbox->sync_initialized = TRUE;
/* assign new mailbox IDs if any are missing */
bboxes = array_get_modifiable(&ctx->mbox->backend_boxes, &count);
for (i = 0; i < count; i++) {
if (bboxes[i]->mailbox_id == 0) {
bboxes[i]->mailbox_id = ++ctx->mbox->highest_mailbox_id;
ret = 0;
}
}
/* sort the backend mailboxes by mailbox_id. */
array_sort(&ctx->mbox->backend_boxes, bbox_mailbox_id_cmp);
return ret;
}
static void virtual_sync_ext_header_rewrite(struct virtual_sync_context *ctx)
{
struct virtual_mail_index_header ext_hdr;
struct virtual_mail_index_mailbox_record mailbox;
struct virtual_backend_box **bboxes;
buffer_t *buf;
const void *ext_data;
size_t ext_size;
unsigned int i, mailbox_pos, name_pos, count;
bboxes = array_get_modifiable(&ctx->mbox->backend_boxes, &count);
mailbox_pos = sizeof(ext_hdr);
name_pos = mailbox_pos + sizeof(mailbox) * count;
memset(&ext_hdr, 0, sizeof(ext_hdr));
memset(&mailbox, 0, sizeof(mailbox));
ext_hdr.change_counter = ++ctx->mbox->prev_change_counter;
ext_hdr.mailbox_count = count;
ext_hdr.highest_mailbox_id = ctx->mbox->highest_mailbox_id;
ext_hdr.search_args_crc32 = ctx->mbox->search_args_crc32;
buf = buffer_create_dynamic(pool_datastack_create(), name_pos + 256);
buffer_append(buf, &ext_hdr, sizeof(ext_hdr));
for (i = 0; i < count; i++) {
i_assert(i == 0 ||
bboxes[i]->mailbox_id > bboxes[i-1]->mailbox_id);
bboxes[i]->sync_mailbox_idx = i;
mailbox.id = bboxes[i]->mailbox_id;
mailbox.name_len = strlen(bboxes[i]->name);
mailbox.uid_validity = bboxes[i]->sync_uid_validity;
mailbox.highest_modseq = bboxes[i]->ondisk_highest_modseq;
mailbox.next_uid = bboxes[i]->sync_next_uid;
buffer_write(buf, mailbox_pos, &mailbox, sizeof(mailbox));
buffer_write(buf, name_pos, bboxes[i]->name, mailbox.name_len);
mailbox_pos += sizeof(mailbox);
name_pos += mailbox.name_len;
}
i_assert(buf->used == name_pos);
mail_index_get_header_ext(ctx->sync_view, ctx->mbox->virtual_ext_id,
&ext_data, &ext_size);
if (ext_size < name_pos) {
mail_index_ext_resize(ctx->trans, ctx->mbox->virtual_ext_id,
name_pos,
sizeof(struct virtual_mail_index_record),
sizeof(uint32_t));
}
mail_index_update_header_ext(ctx->trans, ctx->mbox->virtual_ext_id,
0, buf->data, name_pos);
}
static void virtual_sync_ext_header_update(struct virtual_sync_context *ctx)
{
struct virtual_mail_index_header ext_hdr;
if (!ctx->ext_header_changed)
return;
/* we changed something - update the change counter in header */
ext_hdr.change_counter = ++ctx->mbox->prev_change_counter;
mail_index_update_header_ext(ctx->trans, ctx->mbox->virtual_ext_id,
offsetof(struct virtual_mail_index_header, change_counter),
&ext_hdr.change_counter, sizeof(ext_hdr.change_counter));
}
static int virtual_sync_index_rec(struct virtual_sync_context *ctx,
const struct mail_index_sync_rec *sync_rec)
{
uint32_t virtual_ext_id = ctx->mbox->virtual_ext_id;
struct virtual_backend_box *bbox;
const struct virtual_mail_index_record *vrec;
const void *data;
enum mail_flags flags;
struct mail_keywords *keywords;
enum modify_type modify_type;
const char *kw_names[2];
uint32_t vseq, seq1, seq2;
switch (sync_rec->type) {
case MAIL_INDEX_SYNC_TYPE_EXPUNGE:
case MAIL_INDEX_SYNC_TYPE_FLAGS:
case MAIL_INDEX_SYNC_TYPE_KEYWORD_ADD:
case MAIL_INDEX_SYNC_TYPE_KEYWORD_REMOVE:
break;
}
if (!mail_index_lookup_seq_range(ctx->sync_view,
sync_rec->uid1, sync_rec->uid2,
&seq1, &seq2)) {
/* already expunged, nothing to do. */
return 0;
}
for (vseq = seq1; vseq <= seq2; vseq++) {
mail_index_lookup_ext(ctx->sync_view, vseq, virtual_ext_id,
&data, NULL);
vrec = data;
bbox = virtual_backend_box_lookup(ctx->mbox, vrec->mailbox_id);
if (bbox == NULL)
continue;
if (!bbox->box->opened) {
if (mailbox_open(bbox->box) < 0) {
virtual_box_copy_error(&ctx->mbox->box,
bbox->box);
return -1;
}
}
virtual_backend_box_sync_mail_set(bbox);
if (!mail_set_uid(bbox->sync_mail, vrec->real_uid)) {
/* message is already expunged from backend mailbox. */
continue;
}
switch (sync_rec->type) {
case MAIL_INDEX_SYNC_TYPE_EXPUNGE:
mail_expunge(bbox->sync_mail);
break;
case MAIL_INDEX_SYNC_TYPE_FLAGS:
flags = sync_rec->add_flags & MAIL_FLAGS_NONRECENT;
if (flags != 0) {
mail_update_flags(bbox->sync_mail,
MODIFY_ADD, flags);
}
flags = sync_rec->remove_flags & MAIL_FLAGS_NONRECENT;
if (flags != 0) {
mail_update_flags(bbox->sync_mail,
MODIFY_REMOVE, flags);
}
break;
case MAIL_INDEX_SYNC_TYPE_KEYWORD_ADD:
case MAIL_INDEX_SYNC_TYPE_KEYWORD_REMOVE:
kw_names[0] = ctx->kw_all[sync_rec->keyword_idx];
kw_names[1] = NULL;
keywords = mailbox_keywords_create_valid(bbox->box,
kw_names);
modify_type = sync_rec->type ==
MAIL_INDEX_SYNC_TYPE_KEYWORD_ADD ?
MODIFY_ADD : MODIFY_REMOVE;
mail_update_keywords(bbox->sync_mail,
modify_type, keywords);
mailbox_keywords_unref(&keywords);
break;
}
}
return 0;
}
static int virtual_sync_index_changes(struct virtual_sync_context *ctx)
{
const ARRAY_TYPE(keywords) *keywords;
struct mail_index_sync_rec sync_rec;
keywords = mail_index_get_keywords(ctx->index);
ctx->kw_all = array_count(keywords) == 0 ? NULL :
array_idx(keywords, 0);
while (mail_index_sync_next(ctx->index_sync_ctx, &sync_rec)) {
if (virtual_sync_index_rec(ctx, &sync_rec) < 0)
return -1;
}
return 0;
}
static void virtual_sync_index_finish(struct virtual_sync_context *ctx)
{
struct mailbox *box = &ctx->mbox->box;
const struct mail_index_header *hdr;
uint32_t seq1, seq2;
hdr = mail_index_get_header(ctx->sync_view);
if (hdr->uid_validity != 0)
ctx->uid_validity = hdr->uid_validity;
else
virtual_sync_set_uidvalidity(ctx);
/* mark the newly seen messages as recent */
if (mail_index_lookup_seq_range(ctx->sync_view, hdr->first_recent_uid,
hdr->next_uid, &seq1, &seq2)) {
index_mailbox_set_recent_seq(&ctx->mbox->box, ctx->sync_view,
seq1, seq2);
}
if (ctx->ext_header_rewrite) {
/* entire mailbox list needs to be rewritten */
virtual_sync_ext_header_rewrite(ctx);
} else {
/* update only changed parts in the header */
virtual_sync_ext_header_update(ctx);
}
if (box->v.sync_notify != NULL)
box->v.sync_notify(box, 0, 0);
}
static int virtual_sync_backend_box_init(struct virtual_backend_box *bbox)
{
struct mailbox_transaction_context *trans;
struct mail_search_context *search_ctx;
struct mail *mail;
struct virtual_backend_uidmap uidmap;
enum mailbox_search_result_flags result_flags;
int ret;
trans = mailbox_transaction_begin(bbox->box, 0);
if (!bbox->search_args_initialized) {
mail_search_args_init(bbox->search_args, bbox->box, FALSE, NULL);
bbox->search_args_initialized = TRUE;
}
search_ctx = mailbox_search_init(trans, bbox->search_args, NULL,
0, NULL);
/* save the result and keep it updated */
result_flags = MAILBOX_SEARCH_RESULT_FLAG_UPDATE |
MAILBOX_SEARCH_RESULT_FLAG_QUEUE_SYNC;
bbox->search_result =
mailbox_search_result_save(search_ctx, result_flags);
/* add the found UIDs to uidmap. virtual_uid gets assigned later. */
memset(&uidmap, 0, sizeof(uidmap));
array_clear(&bbox->uids);
while (mailbox_search_next(search_ctx, &mail)) {
uidmap.real_uid = mail->uid;
array_append(&bbox->uids, &uidmap, 1);
}
ret = mailbox_search_deinit(&search_ctx);
(void)mailbox_transaction_commit(&trans);
return ret;
}
static int
virtual_backend_uidmap_bsearch_cmp(const uint32_t *uidp,
const struct virtual_backend_uidmap *uidmap)
{
return *uidp < uidmap->real_uid ? -1 :
(*uidp > uidmap->real_uid ? 1 : 0);
}
static void
virtual_sync_mailbox_box_remove(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox,
const ARRAY_TYPE(seq_range) *removed_uids)
{
const struct seq_range *uids;
struct virtual_backend_uidmap *uidmap;
unsigned int i, src, dest, uid_count, rec_count;
uint32_t uid, vseq;
uids = array_get(removed_uids, &uid_count);
if (uid_count == 0)
return;
/* everything in removed_uids should exist in bbox->uids */
uidmap = array_get_modifiable(&bbox->uids, &rec_count);
i_assert(rec_count >= uid_count);
/* find the first uidmap record to be removed */
if (!array_bsearch_insert_pos(&bbox->uids, &uids[0].seq1,
virtual_backend_uidmap_bsearch_cmp, &src))
i_unreached();
/* remove the unwanted messages */
dest = src;
for (i = 0; i < uid_count; i++) {
uid = uids[i].seq1;
while (uidmap[src].real_uid != uid) {
uidmap[dest++] = uidmap[src++];
i_assert(src < rec_count);
}
for (; uid <= uids[i].seq2; uid++, src++) {
i_assert(src < rec_count);
i_assert(uidmap[src].real_uid == uid);
if (mail_index_lookup_seq(ctx->sync_view,
uidmap[src].virtual_uid,
&vseq))
mail_index_expunge(ctx->trans, vseq);
}
}
array_delete(&bbox->uids, dest, src - dest);
}
static void
virtual_sync_mailbox_box_add(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox,
const ARRAY_TYPE(seq_range) *added_uids_arr)
{
const struct seq_range *added_uids;
struct virtual_backend_uidmap *uidmap;
struct virtual_add_record rec;
unsigned int i, src, dest, uid_count, add_count, rec_count;
uint32_t add_uid;
added_uids = array_get(added_uids_arr, &uid_count);
if (uid_count == 0)
return;
add_count = seq_range_count(added_uids_arr);
/* none of added_uids should exist in bbox->uids. find the position
of the first inserted index. */
uidmap = array_get_modifiable(&bbox->uids, &rec_count);
if (rec_count == 0 ||
added_uids[0].seq1 > uidmap[rec_count-1].real_uid) {
/* fast path: usually messages are appended */
dest = rec_count;
} else if (array_bsearch_insert_pos(&bbox->uids, &added_uids[0].seq1,
virtual_backend_uidmap_bsearch_cmp,
&dest))
i_unreached();
/* make space for all added UIDs. */
if (rec_count == dest)
array_idx_clear(&bbox->uids, dest + add_count-1);
else {
array_copy(&bbox->uids.arr, dest + add_count,
&bbox->uids.arr, dest, rec_count - dest);
}
uidmap = array_get_modifiable(&bbox->uids, &rec_count);
src = dest + add_count;
/* add/move the UIDs to their correct positions */
memset(&rec, 0, sizeof(rec));
rec.rec.mailbox_id = bbox->mailbox_id;
for (i = 0; i < uid_count; i++) {
add_uid = added_uids[i].seq1;
while (src < rec_count && uidmap[src].real_uid < add_uid)
uidmap[dest++] = uidmap[src++];
for (; add_uid <= added_uids[i].seq2; add_uid++, dest++) {
i_assert(dest < rec_count);
uidmap[dest].real_uid = add_uid;
uidmap[dest].virtual_uid = 0;
if (ctx->mbox->uids_mapped) {
rec.rec.real_uid = add_uid;
array_append(&ctx->all_adds, &rec, 1);
}
}
}
}
static int virtual_backend_uidmap_cmp(const struct virtual_backend_uidmap *u1,
const struct virtual_backend_uidmap *u2)
{
if (u1->real_uid < u2->real_uid)
return -1;
if (u1->real_uid > u2->real_uid)
return 1;
return 0;
}
static void virtual_sync_bbox_uids_sort(struct virtual_backend_box *bbox)
{
/* the uidmap must be sorted by real_uids */
array_sort(&bbox->uids, virtual_backend_uidmap_cmp);
bbox->uids_nonsorted = FALSE;
}
static void virtual_sync_backend_boxes_sort_uids(struct virtual_mailbox *mbox)
{
struct virtual_backend_box *const *bboxes;
unsigned int i, count;
bboxes = array_get(&mbox->backend_boxes, &count);
for (i = 0; i < count; i++) {
if (bboxes[i]->uids_nonsorted)
virtual_sync_bbox_uids_sort(bboxes[i]);
}
}
static void
virtual_sync_backend_handle_old_vmsgs(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox,
struct mail_search_result *result)
{
const struct virtual_mail_index_record *vrec;
struct virtual_backend_uidmap uidmap;
const void *data;
uint32_t seq, vseq, vuid, messages;
/* add the currently existing UIDs to uidmap. remember the messages
that were already expunged */
memset(&uidmap, 0, sizeof(uidmap));
array_clear(&bbox->uids);
messages = mail_index_view_get_messages_count(ctx->sync_view);
for (vseq = 1; vseq <= messages; vseq++) {
mail_index_lookup_uid(ctx->sync_view, vseq, &vuid);
mail_index_lookup_ext(ctx->sync_view, vseq,
ctx->mbox->virtual_ext_id, &data, NULL);
vrec = data;
if (vrec->mailbox_id == bbox->mailbox_id) {
uidmap.real_uid = vrec->real_uid;
uidmap.virtual_uid = vuid;
array_append(&bbox->uids, &uidmap, 1);
if (mail_index_lookup_seq(bbox->box->view,
vrec->real_uid, &seq)) {
seq_range_array_add(&result->uids,
vrec->real_uid);
} else {
seq_range_array_add(&result->removed_uids,
vrec->real_uid);
}
}
}
virtual_sync_bbox_uids_sort(bbox);
}
static int virtual_sync_backend_box_continue(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox)
{
const enum mailbox_search_result_flags result_flags =
MAILBOX_SEARCH_RESULT_FLAG_UPDATE |
MAILBOX_SEARCH_RESULT_FLAG_QUEUE_SYNC;
struct mail_index_view *view = bbox->box->view;
struct mail_search_result *result;
ARRAY_TYPE(seq_range) removed_uids, added_uids, flag_update_uids;
uint64_t modseq, old_highest_modseq;
uint32_t seq, uid, old_msg_count;
/* initialize the search result from all the existing messages in
virtual index. */
if (!bbox->search_args_initialized) {
mail_search_args_init(bbox->search_args, bbox->box, FALSE, NULL);
bbox->search_args_initialized = TRUE;
}
result = mailbox_search_result_alloc(bbox->box, bbox->search_args,
result_flags);
mailbox_search_result_initial_done(result);
virtual_sync_backend_handle_old_vmsgs(ctx, bbox, result);
/* get list of changed old messages (messages already once seen by
virtual index), based on modseq changes. (we'll assume all modseq
changes are due to flag changes, which may not be true in future) */
if (bbox->sync_next_uid <= 1 ||
!mail_index_lookup_seq_range(view, 1, bbox->sync_next_uid-1,
&seq, &old_msg_count))
old_msg_count = 0;
old_highest_modseq = mail_index_modseq_get_highest(view);
t_array_init(&flag_update_uids, I_MIN(128, old_msg_count));
if (bbox->sync_highest_modseq < old_highest_modseq) {
for (seq = 1; seq <= old_msg_count; seq++) {
modseq = mail_index_modseq_lookup(view, seq);
if (modseq > bbox->sync_highest_modseq) {
mail_index_lookup_uid(view, seq, &uid);
seq_range_array_add(&flag_update_uids, uid);
}
}
}
/* update the search result based on the flag changes and
new messages */
if (index_search_result_update_flags(result, &flag_update_uids) < 0 ||
index_search_result_update_appends(result, old_msg_count) < 0) {
mailbox_search_result_free(&result);
return -1;
}
t_array_init(&removed_uids, 128);
t_array_init(&added_uids, 128);
mailbox_search_result_sync(result, &removed_uids, &added_uids);
if (ctx->expunge_removed)
virtual_sync_mailbox_box_remove(ctx, bbox, &removed_uids);
else {
/* delayed remove */
seq_range_array_merge(&bbox->sync_pending_removes,
&removed_uids);
}
virtual_sync_mailbox_box_add(ctx, bbox, &added_uids);
bbox->search_result = result;
return 0;
}
static void virtual_sync_drop_existing(struct virtual_backend_box *bbox,
ARRAY_TYPE(seq_range) *added_uids)
{
ARRAY_TYPE(seq_range) drop_uids;
const struct virtual_backend_uidmap *uidmap;
struct seq_range_iter iter;
unsigned int i, n = 0, count;
uint32_t add_uid;
seq_range_array_iter_init(&iter, added_uids);
if (!seq_range_array_iter_nth(&iter, n++, &add_uid))
return;
(void)array_bsearch_insert_pos(&bbox->uids, &add_uid,
virtual_backend_uidmap_bsearch_cmp, &i);
uidmap = array_get_modifiable(&bbox->uids, &count);
if (i == count)
return;
t_array_init(&drop_uids, array_count(added_uids));
for (; i < count; ) {
if (uidmap[i].real_uid < add_uid) {
i++;
continue;
}
if (uidmap[i].real_uid == add_uid) {
seq_range_array_add(&drop_uids, add_uid);
i++;
}
if (!seq_range_array_iter_nth(&iter, n++, &add_uid))
break;
}
seq_range_array_remove_seq_range(added_uids, &drop_uids);
}
static void virtual_sync_drop_nonexistent(struct virtual_backend_box *bbox,
ARRAY_TYPE(seq_range) *removed_uids)
{
ARRAY_TYPE(seq_range) drop_uids;
const struct virtual_backend_uidmap *uidmap;
struct seq_range_iter iter;
unsigned int i, n = 0, count;
uint32_t remove_uid;
bool iter_done = FALSE;
seq_range_array_iter_init(&iter, removed_uids);
if (!seq_range_array_iter_nth(&iter, n++, &remove_uid))
return;
(void)array_bsearch_insert_pos(&bbox->uids, &remove_uid,
virtual_backend_uidmap_bsearch_cmp, &i);
t_array_init(&drop_uids, array_count(removed_uids)); iter_done = FALSE;
uidmap = array_get_modifiable(&bbox->uids, &count);
for (; i < count; ) {
if (uidmap[i].real_uid < remove_uid) {
i++;
continue;
}
if (uidmap[i].real_uid != remove_uid)
seq_range_array_add(&drop_uids, remove_uid);
else
i++;
if (!seq_range_array_iter_nth(&iter, n++, &remove_uid)) {
iter_done = TRUE;
break;
}
}
if (!iter_done) {
do {
seq_range_array_add(&drop_uids, remove_uid);
} while (seq_range_array_iter_nth(&iter, n++, &remove_uid));
}
seq_range_array_remove_seq_range(removed_uids, &drop_uids);
}
static void virtual_sync_mailbox_box_update(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox)
{
ARRAY_TYPE(seq_range) removed_uids, added_uids, temp_uids;
unsigned int count1, count2;
t_array_init(&removed_uids, 128);
t_array_init(&added_uids, 128);
mailbox_search_result_sync(bbox->search_result,
&removed_uids, &added_uids);
if (array_is_created(&bbox->sync_outside_expunges)) {
seq_range_array_remove_seq_range(&bbox->sync_outside_expunges,
&added_uids);
seq_range_array_merge(&removed_uids,
&bbox->sync_outside_expunges);
array_clear(&bbox->sync_outside_expunges);
}
virtual_sync_drop_existing(bbox, &added_uids);
virtual_sync_drop_nonexistent(bbox, &removed_uids);
/* if any of the pending removes came back, we don't want to expunge
them anymore. also since they already exist, remove them from
added_uids. */
count1 = array_count(&bbox->sync_pending_removes);
count2 = array_count(&added_uids);
if (count1 > 0 && count2 > 0) {
t_array_init(&temp_uids, count1);
array_append_array(&temp_uids, &bbox->sync_pending_removes);
if (seq_range_array_remove_seq_range(
&bbox->sync_pending_removes, &added_uids) > 0) {
seq_range_array_remove_seq_range(&added_uids,
&temp_uids);
}
}
if (!ctx->expunge_removed) {
/* delay removing messages that don't match the search
criteria, but don't delay removing expunged messages */
if (array_count(&ctx->sync_expunges) > 0) {
seq_range_array_remove_seq_range(&bbox->sync_pending_removes,
&ctx->sync_expunges);
seq_range_array_remove_seq_range(&removed_uids,
&ctx->sync_expunges);
virtual_sync_mailbox_box_remove(ctx, bbox,
&ctx->sync_expunges);
}
seq_range_array_merge(&bbox->sync_pending_removes,
&removed_uids);
} else if (array_count(&bbox->sync_pending_removes) > 0) {
/* remove all current and old */
seq_range_array_merge(&bbox->sync_pending_removes,
&removed_uids);
virtual_sync_mailbox_box_remove(ctx, bbox,
&bbox->sync_pending_removes);
array_clear(&bbox->sync_pending_removes);
} else {
virtual_sync_mailbox_box_remove(ctx, bbox, &removed_uids);
}
virtual_sync_mailbox_box_add(ctx, bbox, &added_uids);
}
static bool virtual_sync_find_seqs(struct virtual_backend_box *bbox,
const struct mailbox_sync_rec *sync_rec,
unsigned int *idx1_r,
unsigned int *idx2_r)
{
const struct virtual_backend_uidmap *uidmap;
unsigned int idx, count;
uint32_t uid1, uid2;
mail_index_lookup_uid(bbox->box->view, sync_rec->seq1, &uid1);
mail_index_lookup_uid(bbox->box->view, sync_rec->seq2, &uid2);
(void)array_bsearch_insert_pos(&bbox->uids, &uid1,
virtual_backend_uidmap_bsearch_cmp,
&idx);
uidmap = array_get_modifiable(&bbox->uids, &count);
if (idx == count || uidmap[idx].real_uid > uid2)
return FALSE;
*idx1_r = idx;
while (idx < count && uidmap[idx].real_uid <= uid2) idx++;
*idx2_r = idx - 1;
return TRUE;
}
static void virtual_sync_expunge_add(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox,
const struct mailbox_sync_rec *sync_rec)
{
struct virtual_backend_uidmap *uidmap;
uint32_t uid1, uid2;
unsigned int i, idx1, count;
mail_index_lookup_uid(bbox->box->view, sync_rec->seq1, &uid1);
mail_index_lookup_uid(bbox->box->view, sync_rec->seq2, &uid2);
/* remember only the expunges for messages that
already exist for this mailbox */
(void)array_bsearch_insert_pos(&bbox->uids, &uid1,
virtual_backend_uidmap_bsearch_cmp,
&idx1);
uidmap = array_get_modifiable(&bbox->uids, &count);
for (i = idx1; i < count; i++) {
if (uidmap[i].real_uid > uid2)
break;
seq_range_array_add(&ctx->sync_expunges, uidmap[i].real_uid);
}
}
static int virtual_sync_backend_box_sync(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox,
enum mailbox_sync_flags sync_flags)
{
struct mailbox_sync_context *sync_ctx;
const struct virtual_backend_uidmap *uidmap;
struct mailbox_sync_rec sync_rec;
struct mailbox_sync_status sync_status;
unsigned int idx1, idx2;
uint32_t vseq, vuid;
sync_ctx = mailbox_sync_init(bbox->box, sync_flags);
virtual_backend_box_sync_mail_set(bbox);
while (mailbox_sync_next(sync_ctx, &sync_rec)) {
switch (sync_rec.type) {
case MAILBOX_SYNC_TYPE_EXPUNGE:
if (ctx->expunge_removed) {
/* no need to keep track of expunges */
break;
}
virtual_sync_expunge_add(ctx, bbox, &sync_rec);
break;
case MAILBOX_SYNC_TYPE_FLAGS:
if (!virtual_sync_find_seqs(bbox, &sync_rec,
&idx1, &idx2))
break;
uidmap = array_idx(&bbox->uids, 0);
for (; idx1 <= idx2; idx1++) {
vuid = uidmap[idx1].virtual_uid;
if (!mail_index_lookup_seq(ctx->sync_view,
vuid, &vseq)) {
/* expunged by another session,
but we haven't yet updated
bbox->uids. */
continue;
}
virtual_sync_external_flags(ctx, bbox, vseq,
uidmap[idx1].real_uid);
}
break;
case MAILBOX_SYNC_TYPE_MODSEQ:
break;
}
}
return mailbox_sync_deinit(&sync_ctx, &sync_status);
}
static void virtual_sync_backend_ext_header(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox)
{
const unsigned int uidval_pos =
offsetof(struct virtual_mail_index_mailbox_record,
uid_validity);
struct mailbox_status status;
struct virtual_mail_index_mailbox_record mailbox;
unsigned int mailbox_offset;
uint64_t wanted_ondisk_highest_modseq;
mailbox_get_open_status(bbox->box, STATUS_UIDVALIDITY |
STATUS_HIGHESTMODSEQ, &status);
wanted_ondisk_highest_modseq =
array_count(&bbox->sync_pending_removes) > 0 ? 0 :
status.highest_modseq;
if (bbox->sync_uid_validity == status.uidvalidity &&
bbox->sync_next_uid == status.uidnext &&
bbox->sync_highest_modseq == status.highest_modseq &&
bbox->ondisk_highest_modseq == wanted_ondisk_highest_modseq)
return;
/* mailbox changed - update extension header */
bbox->sync_uid_validity = status.uidvalidity;
bbox->sync_highest_modseq = status.highest_modseq;
bbox->ondisk_highest_modseq = wanted_ondisk_highest_modseq;
bbox->sync_next_uid = status.uidnext;
if (ctx->ext_header_rewrite) {
/* we'll rewrite the entire header later */
return;
}
memset(&mailbox, 0, sizeof(mailbox));
mailbox.uid_validity = bbox->sync_uid_validity;
mailbox.highest_modseq = bbox->ondisk_highest_modseq;
mailbox.next_uid = bbox->sync_next_uid;
mailbox_offset = sizeof(struct virtual_mail_index_header) +
bbox->sync_mailbox_idx * sizeof(mailbox);
mail_index_update_header_ext(ctx->trans, ctx->mbox->virtual_ext_id,
mailbox_offset + uidval_pos,
CONST_PTR_OFFSET(&mailbox, uidval_pos),
sizeof(mailbox) - uidval_pos);
ctx->ext_header_changed = TRUE;
}
static int virtual_sync_backend_box(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox)
{
enum mailbox_sync_flags sync_flags;
struct mailbox_status status;
bool bbox_index_opened = bbox->box->opened;
int ret;
/* if we already did some changes to index, commit them before
syncing starts. */
virtual_backend_box_sync_mail_unset(bbox);
sync_flags = ctx->flags & (MAILBOX_SYNC_FLAG_FULL_READ |
MAILBOX_SYNC_FLAG_FULL_WRITE |
MAILBOX_SYNC_FLAG_FAST);
if (bbox->search_result == NULL) {
/* first sync in this process. first try to quickly check
if the mailbox has changed. if we can do that check from
mailbox list index, we don't even need to open the
mailbox. */
i_assert(array_count(&bbox->sync_pending_removes) == 0);
if (bbox_index_opened || bbox->open_failed) {
/* a) index already opened, refresh it
b) delayed error handling for mailbox_open()
that failed in virtual_notify_changes() */
if (mailbox_sync(bbox->box, sync_flags) < 0)
return -1;
bbox->open_failed = FALSE;
}
if (mailbox_get_status(bbox->box, STATUS_UIDVALIDITY |
STATUS_UIDNEXT | STATUS_HIGHESTMODSEQ,
&status) < 0)
return -1;
if (status.uidvalidity == bbox->sync_uid_validity &&
status.uidnext == bbox->sync_next_uid &&
status.highest_modseq == bbox->sync_highest_modseq) {
/* mailbox hasn't changed since we last opened it,
skip it for now. */
return 0;
}
if (!bbox_index_opened) {
/* first time we're opening the index */
if (mailbox_sync(bbox->box, sync_flags) < 0)
return -1;
/* we use modseqs for speeding up initial search result
build. make sure the backend has them enabled. */
mail_index_modseq_enable(bbox->box->index);
}
virtual_backend_box_sync_mail_set(bbox);
if (status.uidvalidity != bbox->sync_uid_validity) {
/* UID validity changed since last sync (or this is
the first sync), do a full search */
i_assert(ctx->expunge_removed);
ret = virtual_sync_backend_box_init(bbox);
} else {
/* build the initial search using the saved modseq. */
ret = virtual_sync_backend_box_continue(ctx, bbox);
}
} else {
/* sync using the existing search result */
i_assert(bbox_index_opened);
i_array_init(&ctx->sync_expunges, 32);
ret = virtual_sync_backend_box_sync(ctx, bbox, sync_flags);
if (ret == 0) T_BEGIN {
virtual_sync_mailbox_box_update(ctx, bbox);
} T_END;
array_free(&ctx->sync_expunges);
}
virtual_sync_backend_ext_header(ctx, bbox);
return ret;
}
static void virtual_sync_backend_map_uids(struct virtual_sync_context *ctx)
{
uint32_t virtual_ext_id = ctx->mbox->virtual_ext_id;
struct virtual_sync_mail *vmails;
struct virtual_backend_box *bbox;
struct virtual_backend_uidmap *uidmap = NULL;
struct virtual_add_record add_rec;
const struct virtual_mail_index_record *vrec;
const void *data;
uint32_t i, vseq, vuid, messages;
unsigned int j = 0, uidmap_count = 0;
messages = mail_index_view_get_messages_count(ctx->sync_view);
if (messages == 0)
return;
/* sort the messages in current view by their backend mailbox and
real UID */
vmails = i_new(struct virtual_sync_mail, messages);
for (vseq = 1; vseq <= messages; vseq++) {
mail_index_lookup_ext(ctx->sync_view, vseq, virtual_ext_id,
&data, NULL);
vrec = data;
vmails[vseq-1].vseq = vseq;
vmails[vseq-1].vrec = *vrec;
}
qsort(vmails, messages, sizeof(*vmails), virtual_sync_mail_cmp);
/* create real mailbox uid -> virtual uid mapping and expunge
messages no longer matching the search rule */
memset(&add_rec, 0, sizeof(add_rec));
bbox = NULL;
for (i = 0; i < messages; i++) {
vseq = vmails[i].vseq;
vrec = &vmails[i].vrec;
if (bbox == NULL || bbox->mailbox_id != vrec->mailbox_id) {
/* add the rest of the newly seen messages */
for (; j < uidmap_count; j++) {
add_rec.rec.real_uid = uidmap[j].real_uid;
array_append(&ctx->all_adds, &add_rec, 1);
}
bbox = virtual_backend_box_lookup(ctx->mbox,
vrec->mailbox_id);
if (bbox == NULL) {
/* the entire mailbox is lost */
mail_index_expunge(ctx->trans, vseq);
continue;
}
uidmap = array_get_modifiable(&bbox->uids,
&uidmap_count);
j = 0;
add_rec.rec.mailbox_id = bbox->mailbox_id;
bbox->sync_seen = TRUE;
}
if (bbox->search_result == NULL) {
/* mailbox is completely unchanged since last sync */
continue;
}
mail_index_lookup_uid(ctx->sync_view, vseq, &vuid);
/* if virtual record doesn't exist in uidmap, it's expunged */
for (; j < uidmap_count; j++) {
if (uidmap[j].real_uid >= vrec->real_uid)
break;
/* newly seen message */
add_rec.rec.real_uid = uidmap[j].real_uid;
array_append(&ctx->all_adds, &add_rec, 1);
}
if (j == uidmap_count || uidmap[j].real_uid != vrec->real_uid)
mail_index_expunge(ctx->trans, vseq);
else {
/* exists - update uidmap and flags */
uidmap[j++].virtual_uid = vuid;
virtual_sync_external_flags(ctx, bbox, vseq,
vrec->real_uid);
}
}
i_free(vmails);
/* finish adding messages to the last mailbox */
for (; j < uidmap_count; j++) {
add_rec.rec.real_uid = uidmap[j].real_uid;
array_append(&ctx->all_adds, &add_rec, 1);
}
}
static void virtual_sync_new_backend_boxes(struct virtual_sync_context *ctx)
{
struct virtual_backend_box *const *bboxes;
struct virtual_add_record add_rec;
struct virtual_backend_uidmap *uidmap;
unsigned int i, j, count, uidmap_count;
/* if there are any mailboxes we didn't yet sync, add new messages in
them */
memset(&add_rec, 0, sizeof(add_rec));
bboxes = array_get(&ctx->mbox->backend_boxes, &count);
for (i = 0; i < count; i++) {
if (bboxes[i]->sync_seen)
continue;
add_rec.rec.mailbox_id = bboxes[i]->mailbox_id;
uidmap = array_get_modifiable(&bboxes[i]->uids, &uidmap_count);
for (j = 0; j < uidmap_count; j++) {
add_rec.rec.real_uid = uidmap[j].real_uid;
array_append(&ctx->all_adds, &add_rec, 1);
}
}
}
static int virtual_add_record_cmp(const struct virtual_add_record *add1,
const struct virtual_add_record *add2)
{
if (add1->received_date < add2->received_date)
return -1;
if (add1->received_date > add2->received_date)
return 1;
/* if they're in same mailbox, we can order them correctly by the UID.
if they're in different mailboxes, ordering by UID doesn't really
help but it doesn't really harm either. */
if (add1->rec.real_uid < add2->rec.real_uid)
return -1;
if (add1->rec.real_uid > add2->rec.real_uid)
return 1;
/* two messages in different mailboxes have the same received date
and UID. */
return 0;
}
static void virtual_sync_backend_sort_new(struct virtual_sync_context *ctx)
{
struct virtual_backend_box *bbox;
struct virtual_add_record *adds;
const struct virtual_mail_index_record *vrec;
unsigned int i, count;
/* get all messages' received dates */
adds = array_get_modifiable(&ctx->all_adds, &count);
for (bbox = NULL, i = 0; i < count; i++) {
vrec = &adds[i].rec;
if (bbox == NULL || bbox->mailbox_id != vrec->mailbox_id) {
bbox = virtual_backend_box_lookup(ctx->mbox,
vrec->mailbox_id);
}
if (!mail_set_uid(bbox->sync_mail, vrec->real_uid))
i_unreached();
if (mail_get_received_date(bbox->sync_mail,
&adds[i].received_date) < 0) {
/* probably expunged already, just add it somewhere */
adds[i].received_date = 0;
}
}
array_sort(&ctx->all_adds, virtual_add_record_cmp);
}
static void virtual_sync_backend_add_new(struct virtual_sync_context *ctx)
{
uint32_t virtual_ext_id = ctx->mbox->virtual_ext_id;
struct virtual_add_record *adds;
struct virtual_backend_box *bbox;
struct virtual_backend_uidmap *uidmap;
const struct mail_index_header *hdr;
const struct virtual_mail_index_record *vrec;
unsigned int i, count, idx;
ARRAY_TYPE(seq_range) saved_uids;
uint32_t vseq, first_uid;
hdr = mail_index_get_header(ctx->sync_view);
adds = array_get_modifiable(&ctx->all_adds, &count);
if (count == 0) {
ctx->mbox->sync_virtual_next_uid = hdr->next_uid;
return;
}
if (adds[0].rec.mailbox_id == adds[count-1].rec.mailbox_id) {
/* all messages are from a single mailbox. add them in
the same order. */
} else {
/* sort new messages by received date to get the add order */
virtual_sync_backend_sort_new(ctx);
}
for (bbox = NULL, i = 0; i < count; i++) {
vrec = &adds[i].rec;
if (bbox == NULL || bbox->mailbox_id != vrec->mailbox_id) {
bbox = virtual_backend_box_lookup(ctx->mbox,
vrec->mailbox_id);
}
mail_index_append(ctx->trans, 0, &vseq);
mail_index_update_ext(ctx->trans, vseq, virtual_ext_id,
vrec, NULL);
virtual_sync_external_flags(ctx, bbox, vseq, vrec->real_uid);
}
/* assign UIDs to new messages */
first_uid = hdr->next_uid;
t_array_init(&saved_uids, 1);
mail_index_append_finish_uids(ctx->trans, first_uid, &saved_uids);
i_assert(seq_range_count(&saved_uids) == count);
/* update virtual UIDs in uidmap */
for (bbox = NULL, i = 0; i < count; i++) {
vrec = &adds[i].rec;
if (bbox == NULL || bbox->mailbox_id != vrec->mailbox_id) {
bbox = virtual_backend_box_lookup(ctx->mbox,
vrec->mailbox_id);
}
if (!array_bsearch_insert_pos(&bbox->uids, &vrec->real_uid,
virtual_backend_uidmap_bsearch_cmp,
&idx))
i_unreached();
uidmap = array_idx_modifiable(&bbox->uids, idx);
i_assert(uidmap->virtual_uid == 0);
uidmap->virtual_uid = first_uid + i;
}
ctx->mbox->sync_virtual_next_uid = first_uid + i;
}
static int
virtual_sync_apply_existing_appends(struct virtual_sync_context *ctx)
{
uint32_t virtual_ext_id = ctx->mbox->virtual_ext_id;
struct virtual_backend_box *bbox = NULL;
const struct mail_index_header *hdr;
const struct virtual_mail_index_record *vrec;
struct virtual_backend_uidmap uidmap;
const void *data;
uint32_t seq, seq2;
if (!ctx->mbox->uids_mapped)
return 0;
hdr = mail_index_get_header(ctx->sync_view);
if (ctx->mbox->sync_virtual_next_uid >= hdr->next_uid)
return 0;
/* another process added messages to virtual index. get backend boxes'
uid lists up-to-date by adding the new messages there. */
if (!mail_index_lookup_seq_range(ctx->sync_view,
ctx->mbox->sync_virtual_next_uid,
(uint32_t)-1, &seq, &seq2))
return 0;
memset(&uidmap, 0, sizeof(uidmap));
for (; seq <= seq2; seq++) {
mail_index_lookup_ext(ctx->sync_view, seq, virtual_ext_id,
&data, NULL);
vrec = data;
uidmap.real_uid = vrec->real_uid;
mail_index_lookup_uid(ctx->sync_view, seq, &uidmap.virtual_uid);
if (bbox == NULL || bbox->mailbox_id != vrec->mailbox_id) {
bbox = virtual_backend_box_lookup(ctx->mbox,
vrec->mailbox_id);
if (bbox == NULL) {
mail_storage_set_critical(
ctx->mbox->box.storage,
"Mailbox ID %u unexpectedly lost",
vrec->mailbox_id);
return -1;
}
}
array_append(&bbox->uids, &uidmap, 1);
bbox->uids_nonsorted = TRUE;
}
virtual_sync_backend_boxes_sort_uids(ctx->mbox);
return 0;
}
static void
virtual_sync_apply_existing_expunges(struct virtual_mailbox *mbox,
struct mailbox_sync_context *sync_ctx)
{
struct index_mailbox_sync_context *isync_ctx =
(struct index_mailbox_sync_context *)sync_ctx;
struct virtual_backend_box *bbox = NULL;
struct seq_range_iter iter;
const struct virtual_mail_index_record *vrec;
const void *data;
unsigned int n = 0;
uint32_t seq;
if (isync_ctx->expunges == NULL)
return;
seq_range_array_iter_init(&iter, isync_ctx->expunges);
while (seq_range_array_iter_nth(&iter, n++, &seq)) {
mail_index_lookup_ext(mbox->box.view, seq,
mbox->virtual_ext_id, &data, NULL);
vrec = data;
if (bbox == NULL || bbox->mailbox_id != vrec->mailbox_id) {
bbox = virtual_backend_box_lookup(mbox,
vrec->mailbox_id);
if (!array_is_created(&bbox->sync_outside_expunges))
i_array_init(&bbox->sync_outside_expunges, 32);
}
seq_range_array_add(&bbox->sync_outside_expunges,
vrec->real_uid);
}
}
static int virtual_sync_backend_boxes(struct virtual_sync_context *ctx)
{
struct virtual_backend_box *const *bboxes;
unsigned int i, count;
if (virtual_sync_apply_existing_appends(ctx) < 0)
return -1;
i_array_init(&ctx->all_adds, 128);
bboxes = array_get(&ctx->mbox->backend_boxes, &count);
for (i = 0; i < count; i++) {
if (virtual_sync_backend_box(ctx, bboxes[i]) < 0) {
/* backend failed, copy the error */
virtual_box_copy_error(&ctx->mbox->box,
bboxes[i]->box);
return -1;
}
}
if (!ctx->mbox->uids_mapped) {
/* initial sync: assign virtual UIDs to existing messages and
sync all flags */
ctx->mbox->uids_mapped = TRUE;
virtual_sync_backend_map_uids(ctx);
virtual_sync_new_backend_boxes(ctx);
}
virtual_sync_backend_add_new(ctx);
array_free(&ctx->all_adds);
return 0;
}
static void virtual_sync_backend_boxes_finish(struct virtual_sync_context *ctx)
{
struct virtual_backend_box *const *bboxes;
unsigned int i, count;
bboxes = array_get(&ctx->mbox->backend_boxes, &count);
for (i = 0; i < count; i++)
virtual_backend_box_sync_mail_unset(bboxes[i]);
}
static int virtual_sync_finish(struct virtual_sync_context *ctx, bool success)
{
int ret = success ? 0 : -1;
virtual_sync_backend_boxes_finish(ctx);
if (success) {
if (mail_index_sync_commit(&ctx->index_sync_ctx) < 0) {
mailbox_set_index_error(&ctx->mbox->box);
ret = -1;
}
} else {
if (ctx->index_broken) {
/* make sure we don't complain about the same errors
over and over again. */
if (mail_index_unlink(ctx->index) < 0) {
i_error("virtual index %s: Failed to unlink() "
"broken indexes: %m",
mailbox_get_path(&ctx->mbox->box));
}
}
mail_index_sync_rollback(&ctx->index_sync_ctx);
}
i_free(ctx);
return ret;
}
static int virtual_sync(struct virtual_mailbox *mbox,
enum mailbox_sync_flags flags)
{
struct virtual_sync_context *ctx;
enum mail_index_sync_flags index_sync_flags;
int ret;
ctx = i_new(struct virtual_sync_context, 1);
ctx->mbox = mbox;
ctx->flags = flags;
ctx->index = mbox->box.index;
/* Removed messages are expunged when
a) EXPUNGE is used
b) Mailbox is being opened (FIX_INCONSISTENT is set) */
ctx->expunge_removed =
(ctx->flags & (MAILBOX_SYNC_FLAG_EXPUNGE |
MAILBOX_SYNC_FLAG_FIX_INCONSISTENT)) != 0;
index_sync_flags = MAIL_INDEX_SYNC_FLAG_FLUSH_DIRTY |
MAIL_INDEX_SYNC_FLAG_AVOID_FLAG_UPDATES;
if ((mbox->box.flags & MAILBOX_FLAG_DROP_RECENT) != 0)
index_sync_flags |= MAIL_INDEX_SYNC_FLAG_DROP_RECENT;
ret = mail_index_sync_begin(ctx->index, &ctx->index_sync_ctx,
&ctx->sync_view, &ctx->trans,
index_sync_flags);
if (ret <= 0) {
if (ret < 0)
mailbox_set_index_error(&mbox->box);
i_free(ctx);
return ret;
}
ret = virtual_sync_ext_header_read(ctx);
if (ret < 0)
return virtual_sync_finish(ctx, FALSE);
if (ret == 0)
ctx->ext_header_rewrite = TRUE;
/* apply changes from virtual index to backend mailboxes */
if (virtual_sync_index_changes(ctx) < 0)
return virtual_sync_finish(ctx, FALSE);
/* update list of UIDs in backend mailboxes */
if (virtual_sync_backend_boxes(ctx) < 0)
return virtual_sync_finish(ctx, FALSE);
virtual_sync_index_finish(ctx);
return virtual_sync_finish(ctx, TRUE);
}
struct mailbox_sync_context *
virtual_storage_sync_init(struct mailbox *box, enum mailbox_sync_flags flags)
{
struct virtual_mailbox *mbox = (struct virtual_mailbox *)box;
struct mailbox_sync_context *sync_ctx;
int ret = 0;
if (!box->opened) {
if (mailbox_open(box) < 0)
ret = -1;
}
if (index_mailbox_want_full_sync(&mbox->box, flags) && ret == 0)
ret = virtual_sync(mbox, flags);
sync_ctx = index_mailbox_sync_init(box, flags, ret < 0);
virtual_sync_apply_existing_expunges(mbox, sync_ctx);
return sync_ctx;
}