static void
ext_reset_update_atomic(struct mail_index_transaction *t,
uint32_t ext_id, uint32_t expected_reset_id)
{
const struct mail_index_ext *map_ext;
struct mail_transaction_ext_reset *reset;
uint32_t idx, reset_id;
if (!mail_index_map_get_ext_idx(t->view->index->map, ext_id, &idx)) {
/* new extension */
reset_id = 1;
} else {
map_ext = array_idx(&t->view->index->map->extensions, idx);
reset_id = map_ext->reset_id + 1;
}
if (reset_id != expected_reset_id) {
/* ignore this extension update */
mail_index_ext_set_reset_id(t, ext_id, 0);
return;
}
if (reset_id == 0)
reset_id++;
array_idx_set(&t->ext_reset_ids, ext_id, &reset_id);
/* reseting existing data is optional */
if (array_is_created(&t->ext_resets)) {
reset = array_idx_modifiable(&t->ext_resets, ext_id);
if (reset->new_reset_id == (uint32_t)-1)
reset->new_reset_id = reset_id;
}
}
static void log_append_ext_intro(struct mail_index_export_context *ctx,
uint32_t ext_id, uint32_t reset_id)
{
struct mail_index_transaction *t = ctx->trans;
const struct mail_index_registered_ext *rext;
struct mail_transaction_ext_intro *intro, *resizes;
buffer_t *buf;
uint32_t idx;
unsigned int count;
i_assert(ext_id != (uint32_t)-1);
if (t->reset ||
!mail_index_map_get_ext_idx(t->view->index->map, ext_id, &idx)) {
/* new extension */
idx = (uint32_t)-1;
}
rext = array_idx(&t->view->index->extensions, ext_id);
if (!array_is_created(&t->ext_resizes)) {
resizes = NULL;
count = 0;
} else {
resizes = array_get_modifiable(&t->ext_resizes, &count);
}
buf = buffer_create_dynamic(pool_datastack_create(), 128);
if (ext_id < count && resizes[ext_id].name_size != 0) {
/* we're resizing the extension. use the resize struct. */
intro = &resizes[ext_id];
i_assert(intro->ext_id == idx);
intro->name_size = idx != (uint32_t)-1 ? 0 :
strlen(rext->name);
buffer_append(buf, intro, sizeof(*intro));
} else {
/* generate a new intro structure */
intro = buffer_append_space_unsafe(buf, sizeof(*intro));
intro->ext_id = idx;
intro->hdr_size = rext->hdr_size;
intro->record_size = rext->record_size;
intro->record_align = rext->record_align;
intro->flags = MAIL_TRANSACTION_EXT_INTRO_FLAG_NO_SHRINK;
intro->name_size = idx != (uint32_t)-1 ? 0 :
strlen(rext->name);
}
if (reset_id != 0) {
/* we're going to reset this extension in this transaction */
intro->reset_id = reset_id;
} else if (idx != (uint32_t)-1) {
/* use the existing reset_id */
const struct mail_index_ext *map_ext =
array_idx(&t->view->index->map->extensions, idx);
intro->reset_id = map_ext->reset_id;
} else {
/* new extension, reset_id defaults to 0 */
}
buffer_append(buf, rext->name, intro->name_size);
if ((buf->used % 4) != 0)
buffer_append_zero(buf, 4 - (buf->used % 4));
if (ctx->append_ctx->new_highest_modseq == 0 &&
strcmp(rext->name, MAIL_INDEX_MODSEQ_EXT_NAME) == 0) {
/* modseq tracking started */
ctx->append_ctx->new_highest_modseq = 1;
}
log_append_buffer(ctx, buf, MAIL_TRANSACTION_EXT_INTRO);
}
