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virtual-sync.c
1760 lines (1548 loc) · 52.1 KB
/
virtual-sync.c
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/* Copyright (c) 2008-2017 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "array.h"
#include "bsearch-insert-pos.h"
#include "ioloop.h"
#include "str.h"
#include "mail-index-modseq.h"
#include "mail-search-build.h"
#include "mailbox-search-result-private.h"
#include "mailbox-recent-flags.h"
#include "index-sync-private.h"
#include "index-search-result.h"
#include "virtual-storage.h"
struct virtual_add_record {
struct virtual_mail_index_record rec;
time_t received_date;
};
struct virtual_sync_mail {
uint32_t vseq;
struct virtual_mail_index_record vrec;
};
struct virtual_sync_context {
struct virtual_mailbox *mbox;
struct mail_index_sync_ctx *index_sync_ctx;
struct mail_index *index;
struct mail_index_view *sync_view;
struct mail_index_transaction *trans;
const char *const *kw_all;
/* messages expunged within this sync */
ARRAY_TYPE(seq_range) sync_expunges;
ARRAY(struct virtual_add_record) all_adds;
/* all messages in this sync, sorted by mailbox_id
(but unsorted inside it for now, since it doesn't matter) */
ARRAY(struct virtual_sync_mail) all_mails;
uint32_t all_mails_idx, all_mails_prev_mailbox_id;
enum mailbox_sync_flags flags;
uint32_t uid_validity;
bool ext_header_changed:1;
bool expunge_removed:1;
bool index_broken:1;
};
static void virtual_sync_backend_box_deleted(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox);
static void virtual_sync_set_uidvalidity(struct virtual_sync_context *ctx)
{
uint32_t uid_validity = ioloop_time;
mail_index_update_header(ctx->trans,
offsetof(struct mail_index_header, uid_validity),
&uid_validity, sizeof(uid_validity), TRUE);
ctx->uid_validity = uid_validity;
}
static void virtual_sync_external_flags(struct virtual_sync_context *ctx,
struct virtual_backend_box *bbox,
uint32_t vseq, uint32_t real_uid)
{
enum mail_flags flags;
const char *const *kw_names;
struct mail_keywords *keywords;
if (!mail_set_uid(bbox->sync_mail, real_uid)) {
/* we may have reopened the mailbox, which could have
caused the mail to be expunged already. */
return;
}
/* copy flags */
flags = mail_get_flags(bbox->sync_mail);
/* we don't need to keep recent flags here */
mail_index_update_flags(ctx->trans, vseq, MODIFY_REPLACE, flags & ~(MAIL_RECENT));
/* copy keywords */
kw_names = mail_get_keywords(bbox->sync_mail);
keywords = mail_index_keywords_create(ctx->index, kw_names);
mail_index_update_keywords(ctx->trans, vseq, MODIFY_REPLACE, keywords);
mail_index_keywords_unref(&keywords);
}
static int virtual_sync_mail_uid_cmp(const void *p1, const void *p2)
{
const struct virtual_sync_mail *m1 = p1, *m2 = p2;
if (m1->vrec.mailbox_id < m2->vrec.mailbox_id)
return -1;
if (m1->vrec.mailbox_id > m2->vrec.mailbox_id)
return 1;
if (m1->vrec.real_uid < m2->vrec.real_uid)
return -1;
if (m1->vrec.real_uid > m2->vrec.real_uid)
return 1;
/* 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;
mbox->ext_header_rewrite = 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);
if (ret == 0)
mbox->ext_header_rewrite = TRUE;
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->mbox->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 (uidmap[src].virtual_uid == 0) {
/* has not been assigned yet */
continue;
}
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)