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/* Copyright (c) 2007-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "array.h"
#include "index-rebuild.h"
#include "mail-cache.h"
#include "sdbox-storage.h"
#include "sdbox-file.h"
#include "sdbox-sync.h"
#include <dirent.h>
static void sdbox_sync_set_uidvalidity(struct index_rebuild_context *ctx)
{
uint32_t uid_validity;
/* if uidvalidity is set in the old index, use it */
uid_validity = mail_index_get_header(ctx->view)->uid_validity;
if (uid_validity == 0)
uid_validity = dbox_get_uidvalidity_next(ctx->box->list);
mail_index_update_header(ctx->trans,
offsetof(struct mail_index_header, uid_validity),
&uid_validity, sizeof(uid_validity), TRUE);
}
static int
sdbox_sync_add_file_index(struct index_rebuild_context *ctx,
struct dbox_file *file, uint32_t uid, bool primary)
{
uint32_t seq;
bool deleted;
int ret;
if ((ret = dbox_file_open(file, &deleted)) > 0) {
if (deleted)
return 0;
ret = dbox_file_seek(file, 0);
}
if (ret == 0) {
if ((ret = dbox_file_fix(file, 0)) > 0)
ret = dbox_file_seek(file, 0);
}
if (ret <= 0) {
if (ret < 0)
return -1;
i_warning("sdbox: Skipping unfixable file: %s", file->cur_path);
return 0;
}
if (!dbox_file_is_in_alt(file) && !primary) {
/* we were supposed to open the file in alt storage, but it
exists in primary storage as well. skip it to avoid adding
it twice. */
return 0;
}
mail_index_append(ctx->trans, uid, &seq);
T_BEGIN {
index_rebuild_index_metadata(ctx, seq, uid);
} T_END;
return 0;
}
static int
sdbox_sync_add_file(struct index_rebuild_context *ctx,
const char *fname, bool primary)
{
struct sdbox_mailbox *mbox = SDBOX_MAILBOX(ctx->box);
struct dbox_file *file;
uint32_t uid;
int ret;
if (!str_begins(fname, SDBOX_MAIL_FILE_PREFIX))
return 0;
fname += strlen(SDBOX_MAIL_FILE_PREFIX);
if (str_to_uint32(fname, &uid) < 0 || uid == 0) {
i_warning("sdbox %s: Ignoring invalid filename %s",
mailbox_get_path(ctx->box), fname);
return 0;
}
file = sdbox_file_init(mbox, uid);
if (!primary)
file->cur_path = file->alt_path;
ret = sdbox_sync_add_file_index(ctx, file, uid, primary);
dbox_file_unref(&file);
return ret;
}
static int sdbox_sync_index_rebuild_dir(struct index_rebuild_context *ctx,
const char *path, bool primary)
{
DIR *dir;
struct dirent *d;
int ret = 0;
dir = opendir(path);
if (dir == NULL) {
if (errno == ENOENT) {
if (!primary) {
/* alt directory doesn't exist, ignore */
return 0;
}
return index_mailbox_fix_inconsistent_existence(ctx->box, path);
}
mailbox_set_critical(ctx->box, "opendir(%s) failed: %m", path);
return -1;
}
do {
errno = 0;
if ((d = readdir(dir)) == NULL)
break;
ret = sdbox_sync_add_file(ctx, d->d_name, primary);
} while (ret >= 0);
if (errno != 0) {
mailbox_set_critical(ctx->box, "readdir(%s) failed: %m", path);
ret = -1;
}
if (closedir(dir) < 0) {
mailbox_set_critical(ctx->box, "closedir(%s) failed: %m", path);
ret = -1;
}
return ret;
}
static void sdbox_sync_update_header(struct index_rebuild_context *ctx)
{
struct sdbox_mailbox *mbox = SDBOX_MAILBOX(ctx->box);
struct sdbox_index_header hdr;
bool need_resize;
if (sdbox_read_header(mbox, &hdr, FALSE, &need_resize) < 0)
i_zero(&hdr);
if (guid_128_is_empty(hdr.mailbox_guid))
guid_128_generate(hdr.mailbox_guid);
if (++hdr.rebuild_count == 0)
hdr.rebuild_count = 1;
/* mailbox is being reset. this gets written directly there */
mail_index_set_ext_init_data(ctx->box->index, mbox->hdr_ext_id,
&hdr, sizeof(hdr));
}
static int
sdbox_sync_index_rebuild_singles(struct index_rebuild_context *ctx)
{
const char *path, *alt_path;
int ret = 0;
path = mailbox_get_path(ctx->box);
if (mailbox_get_path_to(ctx->box, MAILBOX_LIST_PATH_TYPE_ALT_MAILBOX,
&alt_path) < 0)
return -1;
sdbox_sync_set_uidvalidity(ctx);
if (sdbox_sync_index_rebuild_dir(ctx, path, TRUE) < 0) {
mailbox_set_critical(ctx->box, "sdbox: Rebuilding failed");
ret = -1;
} else if (alt_path != NULL) {
if (sdbox_sync_index_rebuild_dir(ctx, alt_path, FALSE) < 0) {
mailbox_set_critical(ctx->box,
"sdbox: Rebuilding failed on alt path %s",
alt_path);
ret = -1;
}
}
sdbox_sync_update_header(ctx);
return ret;
}
int sdbox_sync_index_rebuild(struct sdbox_mailbox *mbox, bool force)
{
struct index_rebuild_context *ctx;
struct mail_index_view *view;
struct mail_index_transaction *trans;
struct sdbox_index_header hdr;
bool need_resize;
int ret;
if (!force && sdbox_read_header(mbox, &hdr, FALSE, &need_resize) == 0) {
if (hdr.rebuild_count != mbox->corrupted_rebuild_count &&
hdr.rebuild_count != 0) {
/* already rebuilt by someone else */
return 0;
}
}
i_warning("sdbox %s: Rebuilding index", mailbox_get_path(&mbox->box));
if (dbox_verify_alt_storage(mbox->box.list) < 0) {
mailbox_set_critical(&mbox->box,
"sdbox: Alt storage not mounted, "
"aborting index rebuild");
return -1;
}
view = mail_index_view_open(mbox->box.index);
trans = mail_index_transaction_begin(view,
MAIL_INDEX_TRANSACTION_FLAG_EXTERNAL);
ctx = index_index_rebuild_init(&mbox->box, view, trans);
ret = sdbox_sync_index_rebuild_singles(ctx);
index_index_rebuild_deinit(&ctx, dbox_get_uidvalidity_next);
if (ret < 0)
mail_index_transaction_rollback(&trans);
else {
mail_index_unset_fscked(trans);
ret = mail_index_transaction_commit(&trans);
}
mail_index_view_close(&view);
mbox->corrupted_rebuild_count = 0;
return ret;
}
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