virtual-sync.c revision fc80e0a7e5ce4376b40cc635ce5c3d88099c95b6
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen/* Copyright (c) 2008-2017 Dovecot authors, see the included COPYING file */
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen#include "lib.h"
345648b341f228bd7f0b89f8aa3ecb9c470d817eTimo Sirainen#include "array.h"
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen#include "bsearch-insert-pos.h"
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen#include "ioloop.h"
5a2cb3d097a2d9a9e930af997e7bf3400a8d840dTimo Sirainen#include "str.h"
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen#include "mail-index-modseq.h"
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen#include "mail-search-build.h"
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen#include "mailbox-search-result-private.h"
97c339398f1aba6f315b55a9b6ee6b020e33bea4Timo Sirainen#include "mailbox-recent-flags.h"
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen#include "index-sync-private.h"
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen#include "index-search-result.h"
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen#include "virtual-storage.h"
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainenstruct virtual_add_record {
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen struct virtual_mail_index_record rec;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen time_t received_date;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen};
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainenstruct virtual_sync_mail {
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen uint32_t vseq;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen struct virtual_mail_index_record vrec;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen};
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainenstruct virtual_sync_context {
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen struct virtual_mailbox *mbox;
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen struct mail_index_sync_ctx *index_sync_ctx;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen struct mail_index *index;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen struct mail_index_view *sync_view;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen struct mail_index_transaction *trans;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen const char *const *kw_all;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen /* messages expunged within this sync */
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen ARRAY_TYPE(seq_range) sync_expunges;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen
73bfdbe28c2ce6d143eadf0bab8ccfbe4cab0faeTimo Sirainen ARRAY(struct virtual_add_record) all_adds;
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen /* all messages in this sync, sorted by mailbox_id
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen (but unsorted inside it for now, since it doesn't matter) */
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen ARRAY(struct virtual_sync_mail) all_mails;
c57776c06ec99ba9b0dafdbf9475ea72ea8ca134Timo Sirainen uint32_t all_mails_idx, all_mails_prev_mailbox_id;
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen enum mailbox_sync_flags flags;
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen uint32_t uid_validity;
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen
d1414c09cf0d58ac983054e2f4e1a1f329272dcfTimo Sirainen bool ext_header_changed:1;
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen bool ext_header_rewrite:1;
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen bool expunge_removed:1;
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen bool index_broken:1;
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen};
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainenstatic void virtual_sync_backend_box_deleted(struct virtual_sync_context *ctx,
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen struct virtual_backend_box *bbox);
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainenstatic void virtual_sync_set_uidvalidity(struct virtual_sync_context *ctx)
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen{
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen uint32_t uid_validity = ioloop_time;
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen mail_index_update_header(ctx->trans,
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen offsetof(struct mail_index_header, uid_validity),
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen &uid_validity, sizeof(uid_validity), TRUE);
e70d5895795732b8247ab9abb045b438e954bc46Timo Sirainen ctx->uid_validity = uid_validity;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen}
33c6d5807b449463e9b81db5ec99fe027cc1b984Timo Sirainen
8eea67470c1bd8562a62e7445d930bb2079b1a43Timo Sirainenstatic void virtual_sync_external_flags(struct virtual_sync_context *ctx,
94a78eb438622fa53abef1e1726714dacad4b61cTimo Sirainen struct virtual_backend_box *bbox,
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen uint32_t vseq, uint32_t real_uid)
c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen{
a4ac325c2802693c6b761e5a8fda961e5d7490eaTimo Sirainen enum mail_flags flags;
b7c2065b3f10f9ae27787a9db5aaefbfc70d4502Timo Sirainen const char *const *kw_names;
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen struct mail_keywords *keywords;
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen if (!mail_set_uid(bbox->sync_mail, real_uid)) {
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen /* we may have reopened the mailbox, which could have
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen caused the mail to be expunged already. */
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen return;
97c339398f1aba6f315b55a9b6ee6b020e33bea4Timo Sirainen }
97c339398f1aba6f315b55a9b6ee6b020e33bea4Timo Sirainen
97c339398f1aba6f315b55a9b6ee6b020e33bea4Timo Sirainen /* copy flags */
97c339398f1aba6f315b55a9b6ee6b020e33bea4Timo Sirainen flags = mail_get_flags(bbox->sync_mail);
97c339398f1aba6f315b55a9b6ee6b020e33bea4Timo Sirainen mail_index_update_flags(ctx->trans, vseq, MODIFY_REPLACE, flags);
97c339398f1aba6f315b55a9b6ee6b020e33bea4Timo Sirainen
97c339398f1aba6f315b55a9b6ee6b020e33bea4Timo Sirainen /* copy keywords */
97c339398f1aba6f315b55a9b6ee6b020e33bea4Timo Sirainen kw_names = mail_get_keywords(bbox->sync_mail);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen keywords = mail_index_keywords_create(ctx->index, kw_names);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen mail_index_update_keywords(ctx->trans, vseq, MODIFY_REPLACE, keywords);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen mail_index_keywords_unref(&keywords);
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen}
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainenstatic int virtual_sync_mail_uid_cmp(const void *p1, const void *p2)
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen{
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen const struct virtual_sync_mail *m1 = p1, *m2 = p2;
33c6d5807b449463e9b81db5ec99fe027cc1b984Timo Sirainen
8eea67470c1bd8562a62e7445d930bb2079b1a43Timo Sirainen if (m1->vrec.mailbox_id < m2->vrec.mailbox_id)
94a78eb438622fa53abef1e1726714dacad4b61cTimo Sirainen return -1;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen if (m1->vrec.mailbox_id > m2->vrec.mailbox_id)
c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen return 1;
a4ac325c2802693c6b761e5a8fda961e5d7490eaTimo Sirainen
b7c2065b3f10f9ae27787a9db5aaefbfc70d4502Timo Sirainen if (m1->vrec.real_uid < m2->vrec.real_uid)
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen return -1;
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen if (m1->vrec.real_uid > m2->vrec.real_uid)
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen return 1;
25757faf029c369a8318349dafe952e2358df1d8Timo Sirainen /* broken */
return 0;
}
static void
virtual_backend_box_sync_mail_set(struct virtual_backend_box *bbox)
{
struct mailbox_transaction_context *trans;
if (bbox->sync_mail == NULL) {
trans = mailbox_transaction_begin(bbox->box, 0);
bbox->sync_mail = mail_alloc(trans, 0, NULL);
}
}
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_mailbox *mbox, const char *name,
struct virtual_backend_box **bbox_r)
{
*bbox_r = virtual_backend_box_lookup_name(mbox, name);
if (*bbox_r != NULL || !mbox->sync_initialized)
return 0;
/* another process just added a new mailbox.
we can't handle this currently. */
mbox->inconsistent = TRUE;
mail_storage_set_error(mbox->box.storage, MAIL_ERROR_TEMP, t_strdup_printf(
"Backend mailbox '%s' added by another session. "
"Reopen the virtual mailbox.", name));
return -1;
}
int virtual_mailbox_ext_header_read(struct virtual_mailbox *mbox,
struct mail_index_view *view,
bool *broken_r)
{
const char *box_path = mailbox_get_path(&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;
*broken_r = FALSE;
hdr = mail_index_get_header(view);
mail_index_get_header_ext(view, mbox->virtual_ext_id,
&ext_data, &ext_size);
ext_hdr = ext_data;
if (mbox->sync_initialized &&
mbox->prev_uid_validity == hdr->uid_validity &&
ext_size >= sizeof(*ext_hdr) &&
mbox->prev_change_counter == ext_hdr->change_counter) {
/* fully refreshed */
return 1;
}
mbox->prev_uid_validity = hdr->uid_validity;
if (ext_hdr == NULL ||
mbox->search_args_crc32 != ext_hdr->search_args_crc32) {
mailboxes = NULL;
ext_name_offset = 0;
ext_mailbox_count = 0;
ret = 0;
} else {
const void *guid_data;
size_t guid_size;
mail_index_get_header_ext(view, mbox->virtual_guid_ext_id,
&guid_data, &guid_size);
if (guid_size >= GUID_128_SIZE)
guid_128_copy(mbox->guid, guid_data);
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);
*broken_r = 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(mbox, 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) {
*broken_r = TRUE;
ret = 0;
}
mbox->highest_mailbox_id = ext_hdr == NULL ? 0 :
ext_hdr->highest_mailbox_id;
/* do not mark it initialized if it's broken */
mbox->sync_initialized = !*broken_r;
/* assign new mailbox IDs if any are missing */
bboxes = array_get_modifiable(&mbox->backend_boxes, &count);
for (i = 0; i < count; i++) {
if (bboxes[i]->mailbox_id == 0) {
bboxes[i]->mailbox_id = ++mbox->highest_mailbox_id;
ret = 0;
}
}
/* sort the backend mailboxes by mailbox_id. */
array_sort(&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;
i_zero(&ext_hdr);
i_zero(&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;
/* repair the value */
if (ctx->mbox->highest_mailbox_id < mailbox.id)
ctx->mbox->highest_mailbox_id = mailbox.id;
}
if (ctx->mbox->highest_mailbox_id != ext_hdr.highest_mailbox_id) {
ext_hdr.highest_mailbox_id = ctx->mbox->highest_mailbox_id;
buffer_write(buf, 0, &ext_hdr, sizeof(ext_hdr));
}
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 (virtual_backend_box_open(ctx->mbox, bbox) < 0) {
virtual_box_copy_error(&ctx->mbox->box,
bbox->box);
return -1;
}
} else {
virtual_backend_box_accessed(ctx->mbox, bbox);
}
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;
struct mail_index_view *view;
uint32_t seq1, seq2;
view = mail_index_transaction_open_updated_view(ctx->trans);
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(view, hdr->first_recent_uid,
(uint32_t)-1, &seq1, &seq2)) {
mailbox_recent_flags_set_seqs(&ctx->mbox->box, view,
seq1, seq2);
}
mail_index_view_close(&view);
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. */
i_zero(&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 */
i_zero(&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_add_vmsgs_results(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox,
uint32_t real_uid,
struct mail_search_result *result,
const uint32_t vseq)
{
struct virtual_backend_uidmap uidmap;
uint32_t vuid, seq;
mail_index_lookup_uid(ctx->sync_view, vseq, &vuid);
i_zero(&uidmap);
uidmap.real_uid = real_uid;
uidmap.virtual_uid = vuid;
array_append(&bbox->uids, &uidmap, 1);
if (result == NULL)
;
else if (mail_index_lookup_seq(bbox->box->view, real_uid, &seq))
seq_range_array_add(&result->uids, real_uid);
else
seq_range_array_add(&result->removed_uids, real_uid);
}
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;
const struct virtual_sync_mail *sync_mail, *sync_mails;
const void *data;
uint32_t i, vseq, messages;
/* find the messages that currently exist in virtual index and add them
to the backend mailbox's list of uids. */
array_clear(&bbox->uids);
if (array_is_created(&ctx->all_mails)) {
i_assert(ctx->all_mails_prev_mailbox_id < bbox->mailbox_id);
sync_mails = array_get(&ctx->all_mails, &messages);
for (i = ctx->all_mails_idx; i < messages; i++) {
sync_mail = &sync_mails[i];
if (sync_mail->vrec.mailbox_id != bbox->mailbox_id) {
if (sync_mail->vrec.mailbox_id < bbox->mailbox_id) {
/* stale mailbox_id, ignore */
continue;
}
/* Should be in mailbox_id order,
so skip to next box */
break;
}
virtual_sync_backend_add_vmsgs_results(ctx, bbox,
sync_mail->vrec.real_uid, result, sync_mail->vseq);
}
ctx->all_mails_idx = i;
ctx->all_mails_prev_mailbox_id = bbox->mailbox_id;
} else {
/* there should be only a single backend mailbox, but in the
existing index there may be stale mailbox_ids that we'll
just skip over. */
messages = mail_index_view_get_messages_count(ctx->sync_view);
for (vseq = 1; vseq <= messages; vseq++) {
mail_index_lookup_ext(ctx->sync_view, vseq,
ctx->mbox->virtual_ext_id, &data, NULL);
vrec = data;
if (vrec->mailbox_id == bbox->mailbox_id) {
virtual_sync_backend_add_vmsgs_results(ctx,
bbox, vrec->real_uid, result, vseq);
}
}
}
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) expunged_uids = ARRAY_INIT, removed_uids;
ARRAY_TYPE(seq_range) 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);
i_assert(array_count(&result->removed_uids) == 0);
virtual_sync_backend_handle_old_vmsgs(ctx, bbox, result);
if (array_count(&result->removed_uids) > 0) {
/* these are all expunged messages. treat them separately from
"no longer matching messages" (=removed_uids) */
t_array_init(&expunged_uids, array_count(&result->removed_uids));
array_append_array(&expunged_uids, &result->removed_uids);
array_clear(&result->removed_uids);
}
/* 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 (array_is_created(&expunged_uids)) {
seq_range_array_remove_seq_range(&removed_uids, &expunged_uids);
virtual_sync_mailbox_box_remove(ctx, bbox, &expunged_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;
}
}
if (mailbox_sync_deinit(&sync_ctx, &sync_status) < 0) {
if (mailbox_get_last_mail_error(bbox->box) != MAIL_ERROR_NOTFOUND)
return -1;
/* mailbox was deleted */
virtual_sync_backend_box_deleted(ctx, bbox);
return 0;
}
return 0;
}
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;
}
i_zero(&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 void virtual_sync_backend_box_deleted(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox)
{
ARRAY_TYPE(seq_range) removed_uids;
const struct virtual_backend_uidmap *uidmap;
/* delay its full removal until the next time we open the virtual
mailbox. for now just treat it as if it was empty. */
t_array_init(&removed_uids, 128);
array_foreach(&bbox->uids, uidmap)
seq_range_array_add(&removed_uids, uidmap->real_uid);
virtual_sync_mailbox_box_remove(ctx, bbox, &removed_uids);
bbox->deleted = TRUE;
}
static int
virtual_try_open_and_sync_backend_box(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox,
enum mailbox_sync_flags sync_flags)
{
int ret = 0;
if (!bbox->box->opened)
ret = virtual_backend_box_open(ctx->mbox, bbox);
if (ret == 0)
ret = mailbox_sync(bbox->box, sync_flags);
if (ret < 0) {
if (mailbox_get_last_mail_error(bbox->box) != MAIL_ERROR_NOTFOUND)
return -1;
/* mailbox was deleted */
virtual_sync_backend_box_deleted(ctx, bbox);
return 0;
}
return 1;
}
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;
int ret;
if (bbox->deleted)
return 0;
/* 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) {
/* a) first sync in this process.
b) we had auto-closed this backend mailbox.
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->box->opened || bbox->open_failed) {
/* a) index already opened, refresh it
b) delayed error handling for mailbox_open()
that failed in virtual_notify_changes() */
if ((ret = virtual_try_open_and_sync_backend_box(ctx, bbox, sync_flags)) <= 0)
return ret;
bbox->open_failed = FALSE;
}
if (mailbox_get_status(bbox->box, STATUS_UIDVALIDITY |
STATUS_UIDNEXT | STATUS_HIGHESTMODSEQ,
&status) < 0) {
if (mailbox_get_last_mail_error(bbox->box) != MAIL_ERROR_NOTFOUND)
return -1;
/* mailbox was deleted */
virtual_sync_backend_box_deleted(ctx, bbox);
return 0;
}
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.
we'll still need to create the bbox->uids mapping
using the current index. */
if (array_count(&bbox->uids) == 0)
virtual_sync_backend_handle_old_vmsgs(ctx, bbox, NULL);
return 0;
}
if (!bbox->box->opened) {
/* first time we're opening the index */
if ((ret = virtual_try_open_and_sync_backend_box(ctx, bbox, sync_flags)) <= 0)
return ret;
}
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 */
ret = virtual_sync_backend_box_init(bbox);
} else {
/* build the initial search using the saved modseq. */
ret = virtual_sync_backend_box_continue(ctx, bbox);
}
i_assert(bbox->search_result != NULL || ret < 0);
} else {
/* sync using the existing search result */
i_assert(bbox->box->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_uid_cmp);
/* create real mailbox uid -> virtual uid mapping and expunge
messages no longer matching the search rule */
i_zero(&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;
}
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;
if (bbox->search_result == NULL) {
/* mailbox is completely unchanged since last
sync - no need to sync flags */
} else {
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 */
i_zero(&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 int 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 (!bbox->box->opened &&
virtual_backend_box_open(ctx->mbox, bbox) < 0)
return -1;
virtual_backend_box_sync_mail_set(bbox);
}
if (!mail_set_uid(bbox->sync_mail, vrec->real_uid)) {
/* we may have reopened the mailbox, which could have
caused the mail to be expunged already. */
adds[i].received_date = 0;
} else if (mail_get_received_date(bbox->sync_mail,
&adds[i].received_date) < 0) {
if (!bbox->sync_mail->expunged)
return -1;
/* expunged already, just add it somewhere */
adds[i].received_date = 0;
}
}
array_sort(&ctx->all_adds, virtual_add_record_cmp);
return 0;
}
static int 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 0;
}
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 */
if (virtual_sync_backend_sort_new(ctx) < 0)
return -1;
}
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 (!bbox->box->opened &&
virtual_backend_box_open(ctx->mbox, bbox) < 0)
return -1;
virtual_backend_box_sync_mail_set(bbox);
}
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;
return 0;
}
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;
i_zero(&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_index_expunge(ctx->trans, seq);
continue;
}
}
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_mail_mailbox_cmp(const struct virtual_sync_mail *m1,
const struct virtual_sync_mail *m2)
{
if (m1->vrec.mailbox_id < m2->vrec.mailbox_id)
return -1;
if (m1->vrec.mailbox_id > m2->vrec.mailbox_id)
return 1;
return 0;
}
static void virtual_sync_bboxes_get_mails(struct virtual_sync_context *ctx)
{
uint32_t messages, vseq;
const void *mail_data;
const struct virtual_mail_index_record *vrec;
struct virtual_sync_mail *sync_mail;
messages = mail_index_view_get_messages_count(ctx->sync_view);
i_array_init(&ctx->all_mails, messages);
for (vseq = 1; vseq <= messages; vseq++) {
mail_index_lookup_ext(ctx->sync_view, vseq,
ctx->mbox->virtual_ext_id, &mail_data, NULL);
vrec = mail_data;
sync_mail = array_append_space(&ctx->all_mails);
sync_mail->vseq = vseq;
sync_mail->vrec = *vrec;
}
array_sort(&ctx->all_mails, virtual_sync_mail_mailbox_cmp);
}
static int virtual_sync_backend_boxes(struct virtual_sync_context *ctx)
{
struct virtual_backend_box *const *bboxes;
unsigned int i, count;
int ret;
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);
/* we have different optimizations depending on whether the virtual
mailbox consists of multiple backend boxes or just one */
if (count > 1)
virtual_sync_bboxes_get_mails(ctx);
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);
}
ret = virtual_sync_backend_add_new(ctx);
#ifdef DEBUG
for (i = 0; i < count; i++) {
const struct virtual_backend_uidmap *uidmap;
array_foreach(&bboxes[i]->uids, uidmap)
i_assert(uidmap->virtual_uid > 0);
}
#endif
array_free(&ctx->all_adds);
if (array_is_created(&ctx->all_mails))
array_free(&ctx->all_mails);
return ret;
}
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;
bool broken;
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_mailbox_ext_header_read(mbox, ctx->sync_view, &broken);
if (ret < 0)
return virtual_sync_finish(ctx, FALSE);
if (ret == 0)
ctx->ext_header_rewrite = TRUE;
if (broken)
ctx->index_broken = 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;
}