diff options
Diffstat (limited to 'src/lib-index/mail-index-sync-ext.c')
| -rw-r--r-- | src/lib-index/mail-index-sync-ext.c | 735 |
1 files changed, 735 insertions, 0 deletions
diff --git a/src/lib-index/mail-index-sync-ext.c b/src/lib-index/mail-index-sync-ext.c new file mode 100644 index 0000000..5d453f3 --- /dev/null +++ b/src/lib-index/mail-index-sync-ext.c @@ -0,0 +1,735 @@ +/* Copyright (c) 2004-2018 Dovecot authors, see the included COPYING file */ + +#include "lib.h" +#include "array.h" +#include "buffer.h" +#include "mail-index-view-private.h" +#include "mail-index-sync-private.h" +#include "mail-index-modseq.h" +#include "mail-transaction-log.h" + + +void mail_index_sync_init_expunge_handlers(struct mail_index_sync_map_ctx *ctx) +{ + const struct mail_index_ext *ext; + const struct mail_index_registered_ext *rext; + const uint32_t *id_map; + void **contexts; + struct mail_index_expunge_handler eh; + unsigned int ext_count, id_map_count; + unsigned int rext_count, context_count, count; + uint32_t idx_ext_id, map_ext_id; + + if (!array_is_created(&ctx->view->map->extensions)) + return; + + i_zero(&eh); + if (array_is_created(&ctx->expunge_handlers)) + array_clear(&ctx->expunge_handlers); + else + i_array_init(&ctx->expunge_handlers, 64); + + rext = array_get(&ctx->view->index->extensions, &rext_count); + ext = array_get(&ctx->view->map->extensions, &ext_count); + id_map = array_get(&ctx->view->map->ext_id_map, &id_map_count); + contexts = array_get_modifiable(&ctx->extra_contexts, &context_count); + + i_assert(context_count >= rext_count); + count = I_MIN(rext_count, id_map_count); + for (idx_ext_id = 0; idx_ext_id < count; idx_ext_id++) { + if (rext[idx_ext_id].expunge_handler == NULL) + continue; + map_ext_id = id_map[idx_ext_id]; + if (map_ext_id == (uint32_t)-1) + continue; + + eh.handler = rext[idx_ext_id].expunge_handler; + eh.sync_context = &contexts[idx_ext_id]; + eh.record_offset = ext[map_ext_id].record_offset; + array_push_back(&ctx->expunge_handlers, &eh); + } + ctx->expunge_handlers_set = TRUE; + ctx->expunge_handlers_used = TRUE; +} + +void +mail_index_sync_deinit_expunge_handlers(struct mail_index_sync_map_ctx *ctx) +{ + const struct mail_index_expunge_handler *eh; + + if (!array_is_created(&ctx->expunge_handlers)) + return; + + array_foreach(&ctx->expunge_handlers, eh) { + if (eh->sync_context != NULL) + eh->handler(ctx, NULL, eh->sync_context); + } + array_free(&ctx->expunge_handlers); +} + +void mail_index_sync_init_handlers(struct mail_index_sync_map_ctx *ctx) +{ + unsigned int count; + + if (!array_is_created(&ctx->view->map->extensions)) + return; + + /* set space for extra contexts */ + count = array_count(&ctx->view->index->extensions); + i_assert(count > 0); + + if (!array_is_created(&ctx->extra_contexts)) + i_array_init(&ctx->extra_contexts, count); + + /* make sure the extra_contexts contains everything */ + (void)array_idx_get_space(&ctx->extra_contexts, count - 1); + /* we need to update the expunge handler list in case they had + already been called */ + ctx->expunge_handlers_set = FALSE; +} + +void mail_index_sync_deinit_handlers(struct mail_index_sync_map_ctx *ctx) +{ + if (array_is_created(&ctx->extra_contexts)) + array_free(&ctx->extra_contexts); +} + +static struct mail_index_ext_header * +get_ext_header(struct mail_index_map *map, const struct mail_index_ext *ext) +{ + struct mail_index_ext_header *ext_hdr; + void *hdr_base; + + /* do some kludgy jumping to get to it. */ + hdr_base = buffer_get_modifiable_data(map->hdr_copy_buf, NULL); + ext_hdr = PTR_OFFSET(hdr_base, ext->ext_offset); + i_assert(memcmp((char *)(ext_hdr + 1), + ext->name, strlen(ext->name)) == 0); + return ext_hdr; +} + +static int mail_index_ext_align_cmp(const void *p1, const void *p2) +{ + const struct mail_index_ext *const *e1 = p1, *const *e2 = p2; + + return (int)(*e2)->record_align - (int)(*e1)->record_align; +} + +static void sync_ext_reorder(struct mail_index_map *map, uint32_t ext_map_idx, + uint16_t old_ext_size) +{ + struct mail_index_ext *ext, **sorted; + struct mail_index_ext_header *ext_hdr; + uint16_t *old_offsets, *copy_sizes, min_align, max_align; + uint32_t offset, new_record_size, rec_idx; + unsigned int i, count; + const void *src; + buffer_t *new_buffer; + size_t new_buffer_size; + + i_assert(MAIL_INDEX_MAP_IS_IN_MEMORY(map) && map->refcount == 1); + + ext = array_get_modifiable(&map->extensions, &count); + i_assert(ext_map_idx < count); + + /* @UNSAFE */ + old_offsets = t_new(uint16_t, count); + copy_sizes = t_new(uint16_t, count); + sorted = t_new(struct mail_index_ext *, count); + for (i = 0; i < count; i++) { + old_offsets[i] = ext[i].record_offset; + copy_sizes[i] = ext[i].record_size; + ext[i].record_offset = 0; + sorted[i] = &ext[i]; + } + qsort(sorted, count, sizeof(struct mail_index_ext *), + mail_index_ext_align_cmp); + + if (copy_sizes[ext_map_idx] > old_ext_size) { + /* we are growing the extension record. remember this + so we don't write extra data while copying the record */ + copy_sizes[ext_map_idx] = old_ext_size; + } + + /* we simply try to use the extensions with largest alignment + requirement first. FIXME: if the extension sizes don't match + alignment, this may not give the minimal layout. */ + offset = MAIL_INDEX_RECORD_MIN_SIZE; + max_align = sizeof(uint32_t); + for (;;) { + min_align = (uint16_t)-1; + for (i = 0; i < count; i++) { + if (sorted[i]->record_align > max_align) + max_align = sorted[i]->record_align; + + if (sorted[i]->record_offset == 0 && + sorted[i]->record_size > 0) { + if ((offset % sorted[i]->record_align) == 0) + break; + if (sorted[i]->record_align < min_align) + min_align = sorted[i]->record_align; + } + } + if (i == count) { + if (min_align == (uint16_t)-1) { + /* all done */ + break; + } + /* we have to leave space here */ + i_assert(min_align > 1 && min_align < (uint16_t)-1); + offset += min_align - (offset % min_align); + } else { + sorted[i]->record_offset = offset; + offset += sorted[i]->record_size; + } + + i_assert(offset < (uint16_t)-1); + } + + if ((offset % max_align) != 0) { + /* keep record size divisible with maximum alignment */ + offset += max_align - (offset % max_align); + } + new_record_size = offset; + i_assert(new_record_size >= sizeof(struct mail_index_record)); + + /* copy the records to new buffer */ + new_buffer_size = map->rec_map->records_count * new_record_size; + new_buffer = buffer_create_dynamic(default_pool, new_buffer_size); + src = map->rec_map->records; + offset = 0; + for (rec_idx = 0; rec_idx < map->rec_map->records_count; rec_idx++) { + /* write the base record */ + buffer_write(new_buffer, offset, src, + sizeof(struct mail_index_record)); + + /* write extensions */ + for (i = 0; i < count; i++) { + buffer_write(new_buffer, offset + ext[i].record_offset, + CONST_PTR_OFFSET(src, old_offsets[i]), + copy_sizes[i]); + } + src = CONST_PTR_OFFSET(src, map->hdr.record_size); + offset += new_record_size; + } + + if (new_buffer->used != new_buffer_size) { + /* we didn't fully write the last record */ + size_t space = new_buffer_size - new_buffer->used; + i_assert(space < new_record_size); + buffer_append_zero(new_buffer, space); + } + + buffer_free(&map->rec_map->buffer); + map->rec_map->buffer = new_buffer; + map->rec_map->records = + buffer_get_modifiable_data(map->rec_map->buffer, NULL); + map->hdr.record_size = new_record_size; + + /* update record offsets in headers */ + for (i = 0; i < count; i++) { + ext_hdr = get_ext_header(map, &ext[i]); + ext_hdr->record_offset = ext[i].record_offset; + } +} + +static void +sync_ext_resize(const struct mail_transaction_ext_intro *u, + uint32_t ext_map_idx, struct mail_index_sync_map_ctx *ctx, + bool no_shrink) +{ + struct mail_index_map *map; + struct mail_index_ext *ext; + struct mail_index_ext_header *ext_hdr; + uint32_t old_padded_hdr_size, new_padded_hdr_size, old_record_size; + bool reorder = FALSE; + + ext = array_idx_modifiable(&ctx->view->map->extensions, ext_map_idx); + old_padded_hdr_size = MAIL_INDEX_HEADER_SIZE_ALIGN(ext->hdr_size); + new_padded_hdr_size = MAIL_INDEX_HEADER_SIZE_ALIGN(u->hdr_size); + + if (ext->record_align != u->record_align || + ext->record_size != u->record_size) { + /* record changed */ + } else if (new_padded_hdr_size < old_padded_hdr_size) { + /* header is shrunk. do we allow? */ + if (no_shrink) + return; + } else if (ext->hdr_size == u->hdr_size) { + /* no changes */ + return; + } + /* something changed. get ourself a new map before we start changing + anything in it. */ + map = mail_index_sync_get_atomic_map(ctx); + /* ext was duplicated to the new map. */ + ext = array_idx_modifiable(&map->extensions, ext_map_idx); + + if (new_padded_hdr_size < old_padded_hdr_size) { + /* header shrank */ + if (no_shrink) + new_padded_hdr_size = old_padded_hdr_size; + else { + buffer_delete(map->hdr_copy_buf, + ext->hdr_offset + new_padded_hdr_size, + old_padded_hdr_size - new_padded_hdr_size); + ext->hdr_size = u->hdr_size; + } + } else if (new_padded_hdr_size > old_padded_hdr_size) { + /* header grown */ + buffer_insert_zero(map->hdr_copy_buf, + ext->hdr_offset + old_padded_hdr_size, + new_padded_hdr_size - old_padded_hdr_size); + ext->hdr_size = u->hdr_size; + } else { + if (ext->hdr_size != u->hdr_size) { + /* aligned sizes were the same, but the actual sizes + had changed */ + ext->hdr_size = u->hdr_size; + } + } + + if (ext->record_align < u->record_align || + (ext->record_align > u->record_align && !no_shrink)) { + ext->record_align = u->record_align; + reorder = TRUE; + } + + old_record_size = ext->record_size; + if (ext->record_size < u->record_size || + (ext->record_size > u->record_size && !no_shrink)) { + ext->record_size = u->record_size; + reorder = TRUE; + } + + i_assert((map->hdr_copy_buf->used % sizeof(uint64_t)) == 0); + map->hdr.header_size = map->hdr_copy_buf->used; + + ext_hdr = get_ext_header(map, ext); + ext_hdr->reset_id = ext->reset_id; + ext_hdr->hdr_size = ext->hdr_size; + ext_hdr->record_offset = ext->record_offset; + ext_hdr->record_size = ext->record_size; + ext_hdr->record_align = ext->record_align; + + if (new_padded_hdr_size != old_padded_hdr_size) { + /* move all hdr_offset of all extensions after this one */ + unsigned int i, count = array_count(&map->extensions); + ssize_t diff = (ssize_t)new_padded_hdr_size - + (ssize_t)old_padded_hdr_size; + + ext = array_front_modifiable(&map->extensions); + for (i = ext_map_idx + 1; i < count; i++) { + ext[i].ext_offset += diff; + ext[i].hdr_offset += diff; + } + } + + if (reorder) + sync_ext_reorder(map, ext_map_idx, old_record_size); +} + +static bool +mail_index_sync_ext_unknown_complain(struct mail_index_sync_map_ctx *ctx, + uint32_t ext_map_idx) +{ + unsigned char *p; + + if (ext_map_idx >= 1024) { + /* don't try to track too high values */ + return TRUE; + } + + if (ctx->unknown_extensions == NULL) { + ctx->unknown_extensions = + buffer_create_dynamic(default_pool, ext_map_idx + 8); + } + p = buffer_get_space_unsafe(ctx->unknown_extensions, ext_map_idx, 1); + if (*p != 0) { + /* we've already complained once */ + return FALSE; + } + *p = 1; + return TRUE; +} + +static void +mail_index_sync_ext_init_new(struct mail_index_sync_map_ctx *ctx, + const char *name, + const struct mail_index_ext_header *ext_hdr, + uint32_t *ext_map_idx_r) +{ + struct mail_index_map *map; + const struct mail_index_ext *ext; + buffer_t *hdr_buf; + uint32_t ext_map_idx; + + i_assert(mail_index_ext_name_is_valid(name)); + + /* be sure to get a unique mapping before we modify the extensions, + otherwise other map users will see the new extension but not the + data records that sync_ext_reorder() adds. */ + map = mail_index_sync_get_atomic_map(ctx); + + hdr_buf = map->hdr_copy_buf; + i_assert(hdr_buf->used == map->hdr.header_size); + + if (MAIL_INDEX_HEADER_SIZE_ALIGN(hdr_buf->used) != hdr_buf->used) { + /* we need to add padding between base header and extensions */ + buffer_append_zero(hdr_buf, + MAIL_INDEX_HEADER_SIZE_ALIGN(hdr_buf->used) - + hdr_buf->used); + } + + /* register record offset initially using zero, + sync_ext_reorder() will fix it. */ + ext_map_idx = mail_index_map_register_ext(map, name, hdr_buf->used, + ext_hdr); + ext = array_idx(&map->extensions, ext_map_idx); + + /* <ext_hdr> <name> [padding] [header data] */ + i_assert(ext_hdr->name_size == strlen(name)); + buffer_append(hdr_buf, ext_hdr, sizeof(*ext_hdr)); + buffer_append(hdr_buf, name, ext_hdr->name_size); + /* header must begin and end in correct alignment */ + buffer_append_zero(hdr_buf, + MAIL_INDEX_HEADER_SIZE_ALIGN(hdr_buf->used) - hdr_buf->used + + MAIL_INDEX_HEADER_SIZE_ALIGN(ext->hdr_size)); + i_assert(hdr_buf->used == + ext->hdr_offset + MAIL_INDEX_HEADER_SIZE_ALIGN(ext->hdr_size)); + i_assert((hdr_buf->used % sizeof(uint64_t)) == 0); + + map->hdr.header_size = hdr_buf->used; + + mail_index_sync_init_handlers(ctx); + sync_ext_reorder(map, ext_map_idx, 0); + i_assert(ext->record_offset != 0 || ext->record_size == 0); + + *ext_map_idx_r = ext_map_idx; +} + +int mail_index_sync_ext_intro(struct mail_index_sync_map_ctx *ctx, + const struct mail_transaction_ext_intro *u) +{ + struct mail_index_map *map = ctx->view->map; + struct mail_index_ext_header ext_hdr; + const struct mail_index_ext *ext; + const char *name, *error; + uint32_t ext_map_idx; + bool no_shrink; + + /* default to ignoring the following extension updates in case this + intro is corrupted */ + ctx->cur_ext_map_idx = (uint32_t)-2; + ctx->cur_ext_ignore = TRUE; + ctx->cur_ext_record_size = 0; + + if (u->ext_id != (uint32_t)-1 && + (!array_is_created(&map->extensions) || + u->ext_id >= array_count(&map->extensions))) { + /* The extension ID is unknown in this map. */ + if (map->hdr.log_file_seq == 0) { + /* This map was generated by + view_sync_get_log_lost_changes(). There's no need to + update any extensions, because they won't be used + anyway. Any extension lookups will be accessed via + the latest index map. */ + i_assert(map->rec_map != ctx->view->index->map->rec_map); + return 1; + } + if (!mail_index_sync_ext_unknown_complain(ctx, u->ext_id)) + return -1; + mail_index_sync_set_corrupted(ctx, + "Extension introduction for unknown id %u", u->ext_id); + return -1; + } + + if (u->ext_id == (uint32_t)-1 && u->name_size == 0) { + mail_index_sync_set_corrupted(ctx, + "Extension introduction without id or name"); + return -1; + } + + if (u->ext_id != (uint32_t)-1) { + name = NULL; + ext_map_idx = u->ext_id; + } else { + name = t_strndup(u + 1, u->name_size); + if (!mail_index_map_lookup_ext(map, name, &ext_map_idx)) + ext_map_idx = (uint32_t)-1; + } + if (ext_map_idx == (uint32_t)-1) + ext = NULL; + else { + ext = array_idx(&map->extensions, ext_map_idx); + name = ext->name; + } + i_assert(name != NULL); + + if (!ctx->internal_update && + strcmp(name, MAIL_INDEX_EXT_KEYWORDS) == 0) { + /* Keyword extension is handled internally by the keyword + code. Any attempt to modify them directly could cause + assert-crashes later, so prevent them immediately. */ + mail_index_sync_set_corrupted(ctx, + "Extension introduction for keywords"); + return -1; + } + + i_zero(&ext_hdr); + ext_hdr.name_size = strlen(name); + ext_hdr.reset_id = u->reset_id; + ext_hdr.hdr_size = u->hdr_size; + ext_hdr.record_size = u->record_size; + ext_hdr.record_align = u->record_align; + no_shrink = (u->flags & MAIL_TRANSACTION_EXT_INTRO_FLAG_NO_SHRINK) != 0; + + /* make sure the header looks valid before doing anything with it */ + if (mail_index_map_ext_hdr_check(&map->hdr, &ext_hdr, + name, &error) < 0) { + mail_index_sync_set_corrupted(ctx, + "Broken extension introduction: %s", error); + return -1; + } + + ctx->cur_ext_record_size = u->record_size; + if (ext != NULL) { + /* exists already */ + if (u->reset_id == ext->reset_id) { + /* check if we need to resize anything */ + sync_ext_resize(u, ext_map_idx, ctx, no_shrink); + ctx->cur_ext_ignore = FALSE; + } else { + /* extension was reset and this transaction hadn't + yet seen it. ignore this update (except for + resets). */ + ctx->cur_ext_ignore = TRUE; + } + + ctx->cur_ext_map_idx = ext_map_idx; + return 1; + } + + mail_index_sync_ext_init_new(ctx, name, &ext_hdr, &ext_map_idx); + + ctx->cur_ext_ignore = FALSE; + ctx->cur_ext_map_idx = ctx->internal_update ? + (uint32_t)-1 : ext_map_idx; + return 1; +} + +static void mail_index_sync_ext_clear(struct mail_index_view *view, + struct mail_index_map *map, + struct mail_index_ext *ext) +{ + struct mail_index_record *rec; + uint32_t seq; + + memset(buffer_get_space_unsafe(map->hdr_copy_buf, ext->hdr_offset, + ext->hdr_size), 0, ext->hdr_size); + i_assert(map->hdr_copy_buf->used == map->hdr.header_size); + + for (seq = 1; seq <= view->map->rec_map->records_count; seq++) { + rec = MAIL_INDEX_REC_AT_SEQ(view->map, seq); + memset(PTR_OFFSET(rec, ext->record_offset), 0, + ext->record_size); + } +} + +int mail_index_sync_ext_reset(struct mail_index_sync_map_ctx *ctx, + const struct mail_transaction_ext_reset *u) +{ + struct mail_index_map *map; + struct mail_index_ext_header *ext_hdr; + struct mail_index_ext *ext; + + if (ctx->cur_ext_map_idx == (uint32_t)-1) { + mail_index_sync_set_corrupted(ctx, + "Extension reset without intro prefix"); + return -1; + } + if (ctx->cur_ext_map_idx == (uint32_t)-2 && ctx->cur_ext_ignore) { + /* previous extension intro was broken */ + return -1; + } + /* since we're resetting the extension, don't check cur_ext_ignore */ + + /* a new index file will be created, so the old data won't be + accidentally used by other processes. */ + map = mail_index_sync_get_atomic_map(ctx); + + ext = array_idx_modifiable(&map->extensions, ctx->cur_ext_map_idx); + ext->reset_id = u->new_reset_id; + + if (u->preserve_data == 0) + mail_index_sync_ext_clear(ctx->view, map, ext); + + ext_hdr = get_ext_header(map, ext); + ext_hdr->reset_id = u->new_reset_id; + return 1; +} + +int mail_index_sync_ext_hdr_update(struct mail_index_sync_map_ctx *ctx, + uint32_t offset, uint32_t size, + const void *data) +{ + struct mail_index_map *map = ctx->view->map; + const struct mail_index_ext *ext; + + if (ctx->cur_ext_map_idx == (uint32_t)-1) { + mail_index_sync_set_corrupted(ctx, + "Extension header update without intro prefix"); + return -1; + } + if (ctx->cur_ext_ignore) + return 1; + + ext = array_idx(&map->extensions, ctx->cur_ext_map_idx); + if (offset + size > ext->hdr_size) { + mail_index_sync_set_corrupted(ctx, + "Extension header update points outside header size"); + return -1; + } + + buffer_write(map->hdr_copy_buf, ext->hdr_offset + offset, data, size); + i_assert(map->hdr_copy_buf->used == map->hdr.header_size); + + if (ext->index_idx == ctx->view->index->modseq_ext_id) + mail_index_modseq_hdr_update(ctx->modseq_ctx); + return 1; +} + +int +mail_index_sync_ext_rec_update(struct mail_index_sync_map_ctx *ctx, + const struct mail_transaction_ext_rec_update *u) +{ + struct mail_index_view *view = ctx->view; + struct mail_index_record *rec; + const struct mail_index_ext *ext; + void *old_data; + uint32_t seq; + + i_assert(ctx->cur_ext_map_idx != (uint32_t)-1); + i_assert(!ctx->cur_ext_ignore); + + if (u->uid == 0 || u->uid >= view->map->hdr.next_uid) { + mail_index_sync_set_corrupted(ctx, + "Extension record update for invalid uid=%u", u->uid); + return -1; + } + + if (!mail_index_lookup_seq(view, u->uid, &seq)) + return 1; + + ext = array_idx(&view->map->extensions, ctx->cur_ext_map_idx); + i_assert(ext->record_offset + ctx->cur_ext_record_size <= + view->map->hdr.record_size); + + rec = MAIL_INDEX_REC_AT_SEQ(view->map, seq); + old_data = PTR_OFFSET(rec, ext->record_offset); + + /* @UNSAFE */ + memcpy(old_data, u + 1, ctx->cur_ext_record_size); + if (ctx->cur_ext_record_size < ext->record_size) { + memset(PTR_OFFSET(old_data, ctx->cur_ext_record_size), 0, + ext->record_size - ctx->cur_ext_record_size); + } + return 1; +} + +int +mail_index_sync_ext_atomic_inc(struct mail_index_sync_map_ctx *ctx, + const struct mail_transaction_ext_atomic_inc *u) +{ + struct mail_index_view *view = ctx->view; + struct mail_index_record *rec; + const struct mail_index_ext *ext; + void *data; + uint32_t seq; + uint64_t min_value, max_value, orig_num; + + i_assert(ctx->cur_ext_map_idx != (uint32_t)-1); + i_assert(!ctx->cur_ext_ignore); + + if (u->uid == 0 || u->uid >= view->map->hdr.next_uid) { + mail_index_sync_set_corrupted(ctx, + "Extension record inc for invalid uid=%u", u->uid); + return -1; + } + + if (!mail_index_lookup_seq(view, u->uid, &seq)) + return 1; + + ext = array_idx(&view->map->extensions, ctx->cur_ext_map_idx); + i_assert(ext->record_offset + ctx->cur_ext_record_size <= + view->map->hdr.record_size); + + rec = MAIL_INDEX_REC_AT_SEQ(view->map, seq); + data = PTR_OFFSET(rec, ext->record_offset); + + min_value = u->diff >= 0 ? 0 : (uint64_t)(-(int64_t)u->diff); + + max_value = ctx->cur_ext_record_size == 8 ? (uint64_t)-1 : + ((uint64_t)1 << (ctx->cur_ext_record_size*8)) - 1; + if (u->diff <= 0) { + /* skip */ + } else if (max_value >= (uint32_t)u->diff) { + max_value -= u->diff; + } else { + mail_index_sync_set_corrupted(ctx, + "Extension record inc diff=%d larger than max value=%u " + "(uid=%u)", u->diff, (unsigned int)max_value, u->uid); + return -1; + } + + switch (ctx->cur_ext_record_size) { + case 1: { + uint8_t *num = data; + + orig_num = *num; + if (orig_num >= min_value && orig_num <= max_value) + *num += u->diff; + break; + } + case 2: { + uint16_t *num = data; + orig_num = *num; + if (orig_num >= min_value && orig_num <= max_value) + *num += u->diff; + break; + } + case 4: { + uint32_t *num = data; + orig_num = *num; + if (orig_num >= min_value && orig_num <= max_value) + *num += u->diff; + break; + } + case 8: { + uint64_t *num = data; + orig_num = *num; + if (orig_num >= min_value && orig_num <= max_value) + *num += u->diff; + break; + } + default: + mail_index_sync_set_corrupted(ctx, + "Extension record inc with invalid size=%u", + ctx->cur_ext_record_size); + return -1; + } + if (orig_num < min_value) { + mail_index_sync_set_corrupted(ctx, + "Extension record inc drops number below zero " + "(uid=%u, diff=%d, orig=%"PRIu64")", + u->uid, u->diff, orig_num); + return -1; + } else if (orig_num > max_value) { + mail_index_sync_set_corrupted(ctx, + "Extension record inc overflows number " + "(uid=%u, diff=%d, orig=%"PRIu64")", + u->uid, u->diff, orig_num); + return -1; + } + return 1; +} |