Mercurial > dovecot > core-2.2
view src/lib-index/mail-transaction-log-append.c @ 3243:40b4ba3c55b8 HEAD
In-memory indexes work again. Just pass dir as NULL to mail_index_alloc().
author | Timo Sirainen <tss@iki.fi> |
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date | Tue, 29 Mar 2005 15:18:49 +0300 |
parents | 929091768426 |
children | a2943c050571 |
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/* Copyright (C) 2003-2004 Timo Sirainen */ #include "lib.h" #include "ioloop.h" #include "buffer.h" #include "write-full.h" #include "mail-index-private.h" #include "mail-index-view-private.h" #include "mail-index-transaction-private.h" #include "mail-transaction-log-private.h" static int log_append_buffer(struct mail_transaction_log_file *file, const buffer_t *buf, const buffer_t *hdr_buf, enum mail_transaction_type type, int external) { struct mail_transaction_header hdr; const void *data, *hdr_data; size_t size, hdr_data_size; uint32_t hdr_size; i_assert((type & MAIL_TRANSACTION_TYPE_MASK) != 0); data = buffer_get_data(buf, &size); if (size == 0) return 0; i_assert((size % 4) == 0); if (hdr_buf != NULL) { hdr_data = buffer_get_data(hdr_buf, &hdr_data_size); i_assert((hdr_data_size % 4) == 0); } else { hdr_data = NULL; hdr_data_size = 0; } memset(&hdr, 0, sizeof(hdr)); hdr.type = type; if (type == MAIL_TRANSACTION_EXPUNGE) hdr.type |= MAIL_TRANSACTION_EXPUNGE_PROT; if (external) hdr.type |= MAIL_TRANSACTION_EXTERNAL; hdr_size = mail_index_uint32_to_offset(sizeof(hdr) + size + hdr_data_size); if (!MAIL_TRANSACTION_LOG_FILE_IN_MEMORY(file)) { if (file->first_append_size == 0) { /* size will be written later once everything is in disk */ file->first_append_size = hdr_size; } else { hdr.size = hdr_size; } if (pwrite_full(file->fd, &hdr, sizeof(hdr), file->sync_offset) < 0) return -1; file->sync_offset += sizeof(hdr); if (hdr_data_size > 0) { if (pwrite_full(file->fd, hdr_data, hdr_data_size, file->sync_offset) < 0) return -1; file->sync_offset += hdr_data_size; } if (pwrite_full(file->fd, data, size, file->sync_offset) < 0) return -1; file->sync_offset += size; } else { hdr.size = hdr_size; i_assert(file->buffer_offset + file->buffer->used == file->sync_offset); buffer_append(file->buffer, &hdr, sizeof(hdr)); buffer_append(file->buffer, hdr_data, hdr_data_size); buffer_append(file->buffer, data, size); file->sync_offset = file->buffer_offset + file->buffer->used; } return 0; } static const buffer_t * log_get_hdr_update_buffer(struct mail_index_transaction *t) { buffer_t *buf; struct mail_transaction_header_update u; uint16_t offset; int state = 0; memset(&u, 0, sizeof(u)); buf = buffer_create_dynamic(pool_datastack_create(), 256); for (offset = 0; offset <= sizeof(t->hdr_change); offset++) { if (offset < sizeof(t->hdr_change) && t->hdr_mask[offset]) { if (state == 0) { u.offset = offset; state++; } } else { if (state > 0) { u.size = offset - u.offset; buffer_append(buf, &u, sizeof(uint16_t)*2); buffer_append(buf, t->hdr_change + u.offset, u.size); state = 0; } } } return buf; } static int log_append_ext_intro(struct mail_transaction_log_file *file, struct mail_index_transaction *t, uint32_t ext_id, uint32_t reset_id) { const struct mail_index_ext *ext; struct mail_transaction_ext_intro *intro; buffer_t *buf; uint32_t idx; unsigned int count; if (!mail_index_map_get_ext_idx(t->view->map, ext_id, &idx)) { /* new extension */ idx = (uint32_t)-1; } ext = array_idx(&t->view->index->extensions, ext_id); if (!array_is_created(&t->ext_resizes)) { intro = NULL; count = 0; } else { intro = array_get_modifyable(&t->ext_resizes, &count); } buf = buffer_create_dynamic(pool_datastack_create(), 128); if (ext_id < count && intro[ext_id].name_size != 0) { /* we're resizing it */ intro += ext_id; i_assert(intro->ext_id == idx); intro->name_size = idx != (uint32_t)-1 ? 0 : strlen(ext->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 = ext->hdr_size; intro->record_size = ext->record_size; intro->record_align = ext->record_align; intro->name_size = idx != (uint32_t)-1 ? 0 : strlen(ext->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->map->extensions, idx); intro->reset_id = map_ext->reset_id; } else { /* new extension, reset_id defaults to 0 */ } buffer_append(buf, ext->name, intro->name_size); if ((buf->used % 4) != 0) buffer_append_zero(buf, 4 - (buf->used % 4)); return log_append_buffer(file, buf, NULL, MAIL_TRANSACTION_EXT_INTRO, t->external); } static int mail_transaction_log_append_ext_intros(struct mail_transaction_log_file *file, struct mail_index_transaction *t) { const struct mail_transaction_ext_intro *resize; struct mail_transaction_ext_reset ext_reset; unsigned int update_count, resize_count, reset_count, ext_count; uint32_t ext_id; const uint32_t *reset; const array_t *update; buffer_t *buf; if (!array_is_created(&t->ext_rec_updates)) { update = NULL; update_count = 0; } else { update = array_get(&t->ext_rec_updates, &update_count); } if (!array_is_created(&t->ext_resizes)) { resize = NULL; resize_count = 0; } else { resize = array_get(&t->ext_resizes, &resize_count); } if (!array_is_created(&t->ext_resets)) { reset = NULL; reset_count = 0; } else { reset = array_get(&t->ext_resets, &reset_count); } memset(&ext_reset, 0, sizeof(ext_reset)); buf = buffer_create_data(pool_datastack_create(), &ext_reset, sizeof(ext_reset)); buffer_set_used_size(buf, sizeof(ext_reset)); ext_count = I_MAX(I_MAX(update_count, resize_count), reset_count); for (ext_id = 0; ext_id < ext_count; ext_id++) { ext_reset.new_reset_id = ext_id < reset_count && reset[ext_id] != 0 ? reset[ext_id] : 0; if ((ext_id < resize_count && resize[ext_id].name_size) || (ext_id < update_count && array_is_created(&update[ext_id])) || ext_reset.new_reset_id != 0) { if (log_append_ext_intro(file, t, ext_id, 0) < 0) return -1; } if (ext_reset.new_reset_id != 0) { if (log_append_buffer(file, buf, NULL, MAIL_TRANSACTION_EXT_RESET, t->external) < 0) return -1; } } return 0; } static int log_append_ext_rec_updates(struct mail_transaction_log_file *file, struct mail_index_transaction *t) { array_t *updates; const uint32_t *reset; unsigned int ext_id, count, reset_count; uint32_t reset_id; if (!array_is_created(&t->ext_rec_updates)) { updates = NULL; count = 0; } else { updates = array_get_modifyable(&t->ext_rec_updates, &count); } if (!array_is_created(&t->ext_resets)) { reset = NULL; reset_count = 0; } else { reset = array_get_modifyable(&t->ext_resets, &reset_count); } for (ext_id = 0; ext_id < count; ext_id++) { if (!array_is_created(&updates[ext_id])) continue; reset_id = ext_id < reset_count && reset[ext_id] != 0 ? reset[ext_id] : 0; if (log_append_ext_intro(file, t, ext_id, reset_id) < 0) return -1; if (log_append_buffer(file, updates[ext_id].buffer, NULL, MAIL_TRANSACTION_EXT_REC_UPDATE, t->external) < 0) return -1; } return 0; } static int log_append_keyword_updates(struct mail_transaction_log_file *file, struct mail_index_transaction *t) { struct mail_index *index = t->view->index; struct mail_transaction_keyword_update kt_hdr; buffer_t *hdr_buf; array_t *updates; unsigned int i, count; hdr_buf = buffer_create_dynamic(pool_datastack_create(), 64); updates = array_get_modifyable(&t->keyword_updates, &count); for (i = 0; i < count; i++) { if (!array_is_created(&updates[i])) continue; buffer_set_used_size(hdr_buf, 0); memset(&kt_hdr, 0, sizeof(kt_hdr)); kt_hdr.modify_type = (i & 1) == 0 ? MODIFY_ADD : MODIFY_REMOVE; kt_hdr.name_size = strlen(index->keywords[i / 2]); buffer_append(hdr_buf, &kt_hdr, sizeof(kt_hdr)); buffer_append(hdr_buf, index->keywords[i / 2], kt_hdr.name_size); if ((hdr_buf->used % 4) != 0) buffer_append_zero(hdr_buf, 4 - (hdr_buf->used % 4)); if (log_append_buffer(file, updates[i].buffer, hdr_buf, MAIL_TRANSACTION_KEYWORD_UPDATE, t->external) < 0) return -1; } return 0; } int mail_transaction_log_append(struct mail_index_transaction *t, uint32_t *log_file_seq_r, uoff_t *log_file_offset_r) { struct mail_index_view *view = t->view; struct mail_index *index; struct mail_transaction_log *log; struct mail_transaction_log_file *file; struct mail_index_header idx_hdr; uoff_t append_offset; unsigned int lock_id; int ret, visibility_changes = FALSE; index = mail_index_view_get_index(view); log = index->log; if (!t->log_updates) { /* nothing to append */ *log_file_seq_r = 0; *log_file_offset_r = 0; return 0; } if (log->index->log_locked) { i_assert(t->external); } else { if (mail_transaction_log_lock_head(log) < 0) return -1; /* update sync_offset */ if (mail_transaction_log_file_map(log->head, log->head->sync_offset, (uoff_t)-1) < 0) { mail_transaction_log_file_unlock(log->head); return -1; } } if (log->head->sync_offset > MAIL_TRANSACTION_LOG_ROTATE_SIZE && (time_t)log->head->hdr.create_stamp < ioloop_time - MAIL_TRANSACTION_LOG_ROTATE_TIME) { /* we might want to rotate, but check first that everything is synced in index. */ if (mail_index_lock_shared(log->index, TRUE, &lock_id) < 0) { if (!log->index->log_locked) mail_transaction_log_file_unlock(log->head); return -1; } if (mail_index_map(index, FALSE) <= 0) { mail_index_unlock(index, lock_id); if (!log->index->log_locked) mail_transaction_log_file_unlock(log->head); return -1; } idx_hdr = *log->index->hdr; mail_index_unlock(log->index, lock_id); if (log->head->hdr.file_seq == idx_hdr.log_file_seq && log->head->sync_offset == idx_hdr.log_file_int_offset && log->head->sync_offset == idx_hdr.log_file_ext_offset) { if (mail_transaction_log_rotate(log, TRUE) < 0) { /* that didn't work. well, try to continue anyway */ } } } file = log->head; file->first_append_size = 0; append_offset = file->sync_offset; ret = 0; /* send all extension introductions and resizes before appends to avoid resize overhead as much as possible */ ret = mail_transaction_log_append_ext_intros(file, t); if (array_is_created(&t->appends) && ret == 0) { visibility_changes = TRUE; ret = log_append_buffer(file, t->appends.buffer, NULL, MAIL_TRANSACTION_APPEND, t->external); } if (array_is_created(&t->updates) && ret == 0) { visibility_changes = TRUE; ret = log_append_buffer(file, t->updates.buffer, NULL, MAIL_TRANSACTION_FLAG_UPDATE, t->external); } if (array_is_created(&t->ext_rec_updates) && ret == 0) ret = log_append_ext_rec_updates(file, t); /* keyword resets before updates */ if (array_is_created(&t->keyword_resets) && ret == 0) { visibility_changes = TRUE; ret = log_append_buffer(file, t->keyword_resets.buffer, NULL, MAIL_TRANSACTION_KEYWORD_RESET, t->external); } if (array_is_created(&t->keyword_updates) && ret == 0) { visibility_changes = TRUE; ret = log_append_keyword_updates(file, t); } if (array_is_created(&t->expunges) && ret == 0) { ret = log_append_buffer(file, t->expunges.buffer, NULL, MAIL_TRANSACTION_EXPUNGE, t->external); } if (t->hdr_changed && ret == 0) { ret = log_append_buffer(file, log_get_hdr_update_buffer(t), NULL, MAIL_TRANSACTION_HEADER_UPDATE, t->external); } if (ret < 0) { mail_index_file_set_syscall_error(log->index, file->filepath, "pwrite()"); } if (ret == 0 && visibility_changes && t->hide_transaction) { mail_index_view_add_synced_transaction(view, file->hdr.file_seq, append_offset); } if (!MAIL_TRANSACTION_LOG_FILE_IN_MEMORY(file)) { if (ret == 0 && fsync(file->fd) < 0) { /* we don't know how much of it got written, it may be corrupted now.. */ mail_index_file_set_syscall_error(log->index, file->filepath, "fsync()"); ret = -1; } if (ret == 0 && file->first_append_size != 0) { /* synced - rewrite first record's header */ ret = pwrite_full(file->fd, &file->first_append_size, sizeof(uint32_t), append_offset); if (ret < 0) { mail_index_file_set_syscall_error(log->index, file->filepath, "pwrite()"); } } } if (ret < 0) file->sync_offset = append_offset; *log_file_seq_r = file->hdr.file_seq; *log_file_offset_r = file->sync_offset; if (!log->index->log_locked) mail_transaction_log_file_unlock(file); return ret; }