mbox-sync.c revision 28b30e9bd1a0a8b9019124abd821cb2989a03910
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen/* Copyright (c) 2004-2008 Dovecot authors, see the included COPYING file */
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen/*
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen Modifying mbox can be slow, so we try to do it all at once minimizing the
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen required disk I/O. We may need to:
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - Update message flags in Status, X-Status and X-Keywords headers
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - Write missing X-UID and X-IMAPbase headers
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - Write missing or broken Content-Length header if there's space
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - Expunge specified messages
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen Here's how we do it:
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - Start reading the mails from the beginning
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - X-Keywords, X-UID and X-IMAPbase headers may contain padding at the end
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen of them, remember how much each message has and offset to beginning of the
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen padding
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - If header needs to be rewritten and there's enough space, do it
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - If we didn't have enough space, remember how much was missing
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - Continue reading and counting the padding in each message. If available
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen padding is enough to rewrite all the previous messages needing it, do it
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - When we encounter expunged message, treat all of it as padding and
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen rewrite previous messages if needed (and there's enough space).
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen Afterwards keep moving messages backwards to fill the expunged space.
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen Moving is done by rewriting each message's headers, with possibly adding
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen missing Content-Length header and padding. Message bodies are moved
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen without modifications.
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - If we encounter end of file, grow the file and rewrite needed messages
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen - Rewriting is done by moving message body forward, rewriting message's
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen header and doing the same for previous message, until all of them are
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen rewritten.
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen*/
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "lib.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "ioloop.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "array.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "buffer.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "hostpid.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "istream.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "file-set-size.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "str.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "read-full.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "write-full.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "message-date.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "istream-raw-mbox.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "mbox-storage.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "index-sync-changes.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "mbox-from.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "mbox-file.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "mbox-lock.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include "mbox-sync-private.h"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include <stddef.h>
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include <stdlib.h>
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include <utime.h>
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#include <sys/stat.h>
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen/* The text below was taken exactly as c-client wrote it to my mailbox,
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen so it's probably copyrighted by University of Washington. */
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen#define PSEUDO_MESSAGE_BODY \
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen"This text is part of the internal format of your mail folder, and is not\n" \
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen"a real message. It is created automatically by the mail system software.\n" \
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen"If deleted, important folder data will be lost, and it will be re-created\n" \
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen"with the data reset to initial values.\n"
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainenvoid mbox_sync_set_critical(struct mbox_sync_context *sync_ctx,
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen const char *fmt, ...)
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen{
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen va_list va;
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen if (sync_ctx->ext_modified) {
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen mail_storage_set_critical(&sync_ctx->mbox->storage->storage,
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen "mbox file %s was modified while we were syncing, "
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen "check your locking settings", sync_ctx->mbox->path);
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen }
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen va_start(va, fmt);
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen mail_storage_set_critical(&sync_ctx->mbox->storage->storage,
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen "%s", t_strdup_vprintf(fmt, va));
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen va_end(va);
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen}
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainenint mbox_sync_seek(struct mbox_sync_context *sync_ctx, uoff_t from_offset)
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen{
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen if (istream_raw_mbox_seek(sync_ctx->input, from_offset) < 0) {
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen mbox_sync_set_critical(sync_ctx,
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen "Unexpectedly lost From-line at offset %"PRIuUOFF_T
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen " from mbox file %s", from_offset,
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen sync_ctx->mbox->path);
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen return -1;
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen }
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen return 0;
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen}
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainenvoid mbox_sync_file_update_ext_modified(struct mbox_sync_context *sync_ctx)
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen{
87460b08cb97b31cde640d4975a6aa2c1d0e7226Timo Sirainen struct stat st;
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen /* Do this even if ext_modified is already set. Expunging code relies
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen on last_stat being updated. */
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen if (fstat(sync_ctx->write_fd, &st) < 0) {
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen mbox_set_syscall_error(sync_ctx->mbox, "fstat()");
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen return;
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen }
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen if (st.st_size != sync_ctx->last_stat.st_size ||
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen (sync_ctx->last_stat.st_mtime != 0 &&
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen !CMP_ST_MTIME(&st, &sync_ctx->last_stat)))
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen sync_ctx->ext_modified = TRUE;
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen sync_ctx->last_stat = st;
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen}
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainenvoid mbox_sync_file_updated(struct mbox_sync_context *sync_ctx, bool dirty)
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen{
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen if (dirty) {
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen /* just mark the stat as dirty. */
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen sync_ctx->last_stat.st_mtime = 0;
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen return;
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen }
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen if (fstat(sync_ctx->write_fd, &sync_ctx->last_stat) < 0)
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen mbox_set_syscall_error(sync_ctx->mbox, "fstat()");
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen i_stream_sync(sync_ctx->input);
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen}
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainenstatic int
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainenmbox_sync_read_next_mail(struct mbox_sync_context *sync_ctx,
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen struct mbox_sync_mail_context *mail_ctx)
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen{
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen /* get EOF */
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen (void)istream_raw_mbox_get_header_offset(sync_ctx->input);
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen if (istream_raw_mbox_is_eof(sync_ctx->input))
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen return 0;
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen p_clear(sync_ctx->mail_keyword_pool);
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen memset(mail_ctx, 0, sizeof(*mail_ctx));
fdc557286bc9f92c5f3bb49096ff6e2bcec0ea79Timo Sirainen mail_ctx->sync_ctx = sync_ctx;
mail_ctx->seq = ++sync_ctx->seq;
mail_ctx->header = sync_ctx->header;
mail_ctx->mail.from_offset =
istream_raw_mbox_get_start_offset(sync_ctx->input);
mail_ctx->mail.offset =
istream_raw_mbox_get_header_offset(sync_ctx->input);
mbox_sync_parse_next_mail(sync_ctx->input, mail_ctx);
i_assert(sync_ctx->input->v_offset != mail_ctx->mail.from_offset ||
sync_ctx->input->eof);
mail_ctx->mail.body_size =
istream_raw_mbox_get_body_size(sync_ctx->input,
mail_ctx->content_length);
i_assert(mail_ctx->mail.body_size < OFF_T_MAX);
if ((mail_ctx->mail.flags & MAIL_RECENT) != 0 &&
!mail_ctx->mail.pseudo) {
if (!sync_ctx->mbox->ibox.keep_recent) {
/* need to add 'O' flag to Status-header */
mail_ctx->need_rewrite = TRUE;
}
mail_ctx->recent = TRUE;
}
return 1;
}
static void mbox_sync_read_index_syncs(struct mbox_sync_context *sync_ctx,
uint32_t uid, bool *sync_expunge_r)
{
if (uid == 0 || sync_ctx->index_reset) {
/* nothing for this or the future ones */
uid = (uint32_t)-1;
}
index_sync_changes_read(sync_ctx->sync_changes, uid, sync_expunge_r);
if (sync_ctx->mbox->mbox_readonly) {
/* we can't expunge anything from read-only mboxes */
*sync_expunge_r = FALSE;
}
}
static bool
mbox_sync_read_index_rec(struct mbox_sync_context *sync_ctx,
uint32_t uid, const struct mail_index_record **rec_r)
{
const struct mail_index_record *rec = NULL;
uint32_t messages_count;
bool ret = FALSE;
if (sync_ctx->index_reset) {
*rec_r = NULL;
return TRUE;
}
messages_count =
mail_index_view_get_messages_count(sync_ctx->sync_view);
while (sync_ctx->idx_seq <= messages_count) {
rec = mail_index_lookup(sync_ctx->sync_view, sync_ctx->idx_seq);
if (uid <= rec->uid)
break;
/* externally expunged message, remove from index */
mail_index_expunge(sync_ctx->t, sync_ctx->idx_seq);
sync_ctx->idx_seq++;
rec = NULL;
}
if (rec == NULL && uid < sync_ctx->idx_next_uid) {
/* this UID was already in index and it was expunged */
mbox_sync_set_critical(sync_ctx,
"mbox sync: Expunged message reappeared in mailbox %s "
"(UID %u < %u, seq=%u, idx_msgs=%u)",
sync_ctx->mbox->path, uid, sync_ctx->idx_next_uid,
sync_ctx->seq, messages_count);
ret = FALSE; rec = NULL;
} else if (rec != NULL && rec->uid != uid) {
/* new UID in the middle of the mailbox - shouldn't happen */
mbox_sync_set_critical(sync_ctx,
"mbox sync: UID inserted in the middle of mailbox %s "
"(%u > %u, seq=%u, idx_msgs=%u)", sync_ctx->mbox->path,
rec->uid, uid, sync_ctx->seq, messages_count);
ret = FALSE; rec = NULL;
} else {
ret = TRUE;
}
*rec_r = rec;
return ret;
}
static void mbox_sync_find_index_md5(struct mbox_sync_context *sync_ctx,
unsigned char hdr_md5_sum[],
const struct mail_index_record **rec_r)
{
const struct mail_index_record *rec = NULL;
uint32_t messages_count;
const void *data;
if (sync_ctx->index_reset) {
*rec_r = NULL;
return;
}
messages_count =
mail_index_view_get_messages_count(sync_ctx->sync_view);
while (sync_ctx->idx_seq <= messages_count) {
rec = mail_index_lookup(sync_ctx->sync_view, sync_ctx->idx_seq);
mail_index_lookup_ext(sync_ctx->sync_view,
sync_ctx->idx_seq,
sync_ctx->mbox->ibox.md5hdr_ext_idx,
&data, NULL);
if (data != NULL && memcmp(data, hdr_md5_sum, 16) == 0)
break;
/* externally expunged message, remove from index */
mail_index_expunge(sync_ctx->t, sync_ctx->idx_seq);
sync_ctx->idx_seq++;
rec = NULL;
}
*rec_r = rec;
}
static void
mbox_sync_update_from_offset(struct mbox_sync_context *sync_ctx,
struct mbox_sync_mail *mail,
bool nocheck)
{
const void *data;
uint64_t offset;
if (!nocheck) {
/* see if from_offset needs updating */
mail_index_lookup_ext(sync_ctx->sync_view, sync_ctx->idx_seq,
sync_ctx->mbox->mbox_ext_idx,
&data, NULL);
if (data != NULL &&
*((const uint64_t *)data) == mail->from_offset)
return;
}
offset = mail->from_offset;
mail_index_update_ext(sync_ctx->t, sync_ctx->idx_seq,
sync_ctx->mbox->mbox_ext_idx, &offset, NULL);
}
static void
mbox_sync_update_index_keywords(struct mbox_sync_mail_context *mail_ctx)
{
struct mbox_sync_context *sync_ctx = mail_ctx->sync_ctx;
struct mail_keywords *keywords;
keywords = !array_is_created(&mail_ctx->mail.keywords) ?
mail_index_keywords_create(sync_ctx->mbox->ibox.index, NULL) :
mail_index_keywords_create_from_indexes(
sync_ctx->mbox->ibox.index, &mail_ctx->mail.keywords);
mail_index_update_keywords(sync_ctx->t, sync_ctx->idx_seq,
MODIFY_REPLACE, keywords);
mail_index_keywords_free(&keywords);
}
static void
mbox_sync_update_md5_if_changed(struct mbox_sync_mail_context *mail_ctx)
{
struct mbox_sync_context *sync_ctx = mail_ctx->sync_ctx;
const void *ext_data;
mail_index_lookup_ext(sync_ctx->sync_view, sync_ctx->idx_seq,
sync_ctx->mbox->ibox.md5hdr_ext_idx,
&ext_data, NULL);
if (ext_data == NULL ||
memcmp(mail_ctx->hdr_md5_sum, ext_data, 16) != 0) {
mail_index_update_ext(sync_ctx->t, sync_ctx->idx_seq,
sync_ctx->mbox->ibox.md5hdr_ext_idx,
mail_ctx->hdr_md5_sum, NULL);
}
}
static void mbox_sync_get_dirty_flags(struct mbox_sync_mail_context *mail_ctx,
const struct mail_index_record *rec)
{
struct mbox_sync_context *sync_ctx = mail_ctx->sync_ctx;
ARRAY_TYPE(keyword_indexes) idx_keywords;
uint8_t idx_flags, mbox_flags;
/* default to undirtying the message. it gets added back if
flags/keywords don't match what is in the index. */
mail_ctx->mail.flags &= ~MAIL_INDEX_MAIL_FLAG_DIRTY;
/* replace flags */
idx_flags = rec->flags & MAIL_FLAGS_NONRECENT;
mbox_flags = mail_ctx->mail.flags & MAIL_FLAGS_NONRECENT;
if (idx_flags != mbox_flags) {
mail_ctx->need_rewrite = TRUE;
mail_ctx->mail.flags = (mail_ctx->mail.flags & MAIL_RECENT) |
idx_flags | MAIL_INDEX_MAIL_FLAG_DIRTY;
}
/* replace keywords */
t_array_init(&idx_keywords, 32);
mail_index_lookup_keywords(sync_ctx->sync_view, sync_ctx->idx_seq,
&idx_keywords);
if (!index_keyword_array_cmp(&idx_keywords, &mail_ctx->mail.keywords)) {
mail_ctx->need_rewrite = TRUE;
mail_ctx->mail.flags |= MAIL_INDEX_MAIL_FLAG_DIRTY;
if (!array_is_created(&mail_ctx->mail.keywords)) {
p_array_init(&mail_ctx->mail.keywords,
sync_ctx->mail_keyword_pool,
array_count(&idx_keywords));
}
array_clear(&mail_ctx->mail.keywords);
array_append_array(&mail_ctx->mail.keywords, &idx_keywords);
}
}
static void mbox_sync_update_flags(struct mbox_sync_mail_context *mail_ctx,
const struct mail_index_record *rec)
{
struct mbox_sync_context *sync_ctx = mail_ctx->sync_ctx;
struct mailbox *box = &sync_ctx->mbox->ibox.box;
struct mbox_sync_mail *mail = &mail_ctx->mail;
enum mail_index_sync_type sync_type;
ARRAY_TYPE(keyword_indexes) orig_keywords = ARRAY_INIT;
uint8_t flags, orig_flags;
if (rec != NULL) {
if ((rec->flags & MAIL_INDEX_MAIL_FLAG_DIRTY) != 0) {
/* flags and keywords are dirty. replace the current
ones from the flags in index file. */
mbox_sync_get_dirty_flags(mail_ctx, rec);
}
}
flags = orig_flags = mail->flags & MAIL_FLAGS_NONRECENT;
if (array_is_created(&mail->keywords)) {
t_array_init(&orig_keywords, 32);
array_append_array(&orig_keywords, &mail->keywords);
}
/* apply new changes */
index_sync_changes_apply(sync_ctx->sync_changes,
sync_ctx->mail_keyword_pool,
&flags, &mail->keywords, &sync_type);
if (flags != orig_flags ||
!index_keyword_array_cmp(&mail->keywords, &orig_keywords)) {
mail_ctx->need_rewrite = TRUE;
mail->flags = flags | (mail->flags & MAIL_RECENT) |
MAIL_INDEX_MAIL_FLAG_DIRTY;
}
if (sync_type != 0 && box->v.sync_notify != NULL) {
box->v.sync_notify(box, rec->uid,
index_sync_type_convert(sync_type));
}
}
static void mbox_sync_update_index(struct mbox_sync_mail_context *mail_ctx,
const struct mail_index_record *rec)
{
struct mbox_sync_context *sync_ctx = mail_ctx->sync_ctx;
struct mbox_sync_mail *mail = &mail_ctx->mail;
ARRAY_TYPE(keyword_indexes) idx_keywords;
uint8_t mbox_flags;
mbox_flags = mail->flags & ~MAIL_RECENT;
if (!sync_ctx->delay_writes) {
/* changes are written to the mbox file */
mbox_flags &= ~MAIL_INDEX_MAIL_FLAG_DIRTY;
}
if (rec == NULL) {
/* new message */
mail_index_append(sync_ctx->t, mail->uid, &sync_ctx->idx_seq);
mail_index_update_flags(sync_ctx->t, sync_ctx->idx_seq,
MODIFY_REPLACE, mbox_flags);
mbox_sync_update_index_keywords(mail_ctx);
if (sync_ctx->mbox->mbox_save_md5 != 0) {
mail_index_update_ext(sync_ctx->t, sync_ctx->idx_seq,
sync_ctx->mbox->ibox.md5hdr_ext_idx,
mail_ctx->hdr_md5_sum, NULL);
}
} else {
if ((rec->flags & MAIL_FLAGS_NONRECENT) !=
(mbox_flags & MAIL_FLAGS_NONRECENT)) {
/* flags other than recent/dirty have changed */
mail_index_update_flags(sync_ctx->t, sync_ctx->idx_seq,
MODIFY_REPLACE, mbox_flags);
} else if (((rec->flags ^ mbox_flags) &
MAIL_INDEX_MAIL_FLAG_DIRTY) != 0) {
/* only dirty flag state changed */
bool dirty;
dirty = (mbox_flags & MAIL_INDEX_MAIL_FLAG_DIRTY) != 0;
mail_index_update_flags(sync_ctx->t, sync_ctx->idx_seq,
dirty ? MODIFY_ADD : MODIFY_REMOVE,
(enum mail_flags)MAIL_INDEX_MAIL_FLAG_DIRTY);
}
/* see if keywords changed */
t_array_init(&idx_keywords, 32);
mail_index_lookup_keywords(sync_ctx->sync_view,
sync_ctx->idx_seq, &idx_keywords);
if (!index_keyword_array_cmp(&idx_keywords, &mail->keywords))
mbox_sync_update_index_keywords(mail_ctx);
/* see if we need to update md5 sum. */
if (sync_ctx->mbox->mbox_save_md5 != 0)
mbox_sync_update_md5_if_changed(mail_ctx);
}
/* mail_ctx->recent is TRUE always if Status: O doesn't exist in the
mbox file. With lazy writes another session could have taken it
already, so we'll also have to check this from index header. */
if (!mail_ctx->recent || mail->uid < sync_ctx->hdr->first_recent_uid)
sync_ctx->last_nonrecent_uid = mail->uid;
else
index_mailbox_set_recent_uid(&sync_ctx->mbox->ibox, mail->uid);
/* update from_offsets, but not if we're going to rewrite this message.
rewriting would just move it anyway. */
if (sync_ctx->need_space_seq == 0) {
bool nocheck = rec == NULL || sync_ctx->expunged_space > 0;
mbox_sync_update_from_offset(sync_ctx, mail, nocheck);
}
}
static int mbox_read_from_line(struct mbox_sync_mail_context *ctx)
{
struct istream *input = ctx->sync_ctx->file_input;
const unsigned char *data;
size_t size, from_line_size;
buffer_set_used_size(ctx->sync_ctx->from_line, 0);
from_line_size = ctx->hdr_offset - ctx->mail.from_offset;
i_stream_seek(input, ctx->mail.from_offset);
for (;;) {
data = i_stream_get_data(input, &size);
if (size >= from_line_size)
size = from_line_size;
buffer_append(ctx->sync_ctx->from_line, data, size);
i_stream_skip(input, size);
from_line_size -= size;
if (from_line_size == 0)
break;
if (i_stream_read(input) < 0)
return -1;
}
return 0;
}
static int mbox_rewrite_base_uid_last(struct mbox_sync_context *sync_ctx)
{
unsigned char buf[10];
const char *str;
uint32_t uid_last;
unsigned int i;
int ret;
i_assert(sync_ctx->base_uid_last_offset != 0);
/* first check that the 10 bytes are there and they're exactly as
expected. just an extra safety check to make sure we never write
to wrong location in the mbox file. */
ret = pread_full(sync_ctx->write_fd, buf, sizeof(buf),
sync_ctx->base_uid_last_offset);
if (ret < 0) {
mbox_set_syscall_error(sync_ctx->mbox, "pread_full()");
return -1;
}
if (ret == 0) {
mbox_sync_set_critical(sync_ctx,
"X-IMAPbase uid-last unexpectedly points outside "
"mbox file %s", sync_ctx->mbox->path);
return -1;
}
for (i = 0, uid_last = 0; i < sizeof(buf); i++) {
if (buf[i] < '0' || buf[i] > '9') {
uid_last = (uint32_t)-1;
break;
}
uid_last = uid_last * 10 + (buf[i] - '0');
}
if (uid_last != sync_ctx->base_uid_last) {
mbox_sync_set_critical(sync_ctx,
"X-IMAPbase uid-last unexpectedly lost in mbox file %s",
sync_ctx->mbox->path);
return -1;
}
/* and write it */
str = t_strdup_printf("%010u", sync_ctx->next_uid - 1);
if (pwrite_full(sync_ctx->write_fd, str, 10,
sync_ctx->base_uid_last_offset) < 0) {
mbox_set_syscall_error(sync_ctx->mbox, "pwrite_full()");
return -1;
}
mbox_sync_file_updated(sync_ctx, FALSE);
sync_ctx->base_uid_last = sync_ctx->next_uid - 1;
return 0;
}
static int
mbox_write_from_line(struct mbox_sync_mail_context *ctx)
{
string_t *str = ctx->sync_ctx->from_line;
if (pwrite_full(ctx->sync_ctx->write_fd, str_data(str), str_len(str),
ctx->mail.from_offset) < 0) {
mbox_set_syscall_error(ctx->sync_ctx->mbox, "pwrite_full()");
return -1;
}
mbox_sync_file_updated(ctx->sync_ctx, FALSE);
return 0;
}
static void update_from_offsets(struct mbox_sync_context *sync_ctx)
{
const struct mbox_sync_mail *mails;
unsigned int i, count;
uint32_t ext_idx;
uint64_t offset;
ext_idx = sync_ctx->mbox->mbox_ext_idx;
mails = array_get(&sync_ctx->mails, &count);
for (i = 0; i < count; i++) {
if (mails[i].idx_seq == 0 || mails[i].expunged)
continue;
sync_ctx->moved_offsets = TRUE;
offset = mails[i].from_offset;
mail_index_update_ext(sync_ctx->t, mails[i].idx_seq,
ext_idx, &offset, NULL);
}
}
static void mbox_sync_handle_expunge(struct mbox_sync_mail_context *mail_ctx)
{
struct mbox_sync_context *sync_ctx = mail_ctx->sync_ctx;
struct mailbox *box = &sync_ctx->mbox->ibox.box;
if (box->v.sync_notify != NULL) {
box->v.sync_notify(box, mail_ctx->mail.uid,
MAILBOX_SYNC_TYPE_EXPUNGE);
}
mail_index_expunge(sync_ctx->t, mail_ctx->mail.idx_seq);
mail_ctx->mail.expunged = TRUE;
mail_ctx->mail.offset = mail_ctx->mail.from_offset;
mail_ctx->mail.space =
mail_ctx->body_offset - mail_ctx->mail.from_offset +
mail_ctx->mail.body_size;
mail_ctx->mail.body_size = 0;
mail_ctx->mail.uid = 0;
if (sync_ctx->seq == 1) {
/* expunging first message, fix space to contain next
message's \n header too since it will be removed. */
mail_ctx->mail.space++;
if (istream_raw_mbox_has_crlf_ending(sync_ctx->input)) {
mail_ctx->mail.space++;
sync_ctx->first_mail_crlf_expunged = TRUE;
}
/* uid-last offset is invalid now */
sync_ctx->base_uid_last_offset = 0;
}
sync_ctx->expunged_space += mail_ctx->mail.space;
}
static int mbox_sync_handle_header(struct mbox_sync_mail_context *mail_ctx)
{
struct mbox_sync_context *sync_ctx = mail_ctx->sync_ctx;
uoff_t orig_from_offset;
off_t move_diff;
int ret;
if (sync_ctx->expunged_space > 0 && sync_ctx->need_space_seq == 0) {
/* move the header backwards to fill expunged space */
move_diff = -sync_ctx->expunged_space;
orig_from_offset = mail_ctx->mail.from_offset;
if (sync_ctx->dest_first_mail) {
/* we're moving this mail to beginning of file.
skip the initial \n (it's already counted in
expunged_space) */
mail_ctx->mail.from_offset++;
if (sync_ctx->first_mail_crlf_expunged)
mail_ctx->mail.from_offset++;
}
/* read the From-line before rewriting overwrites it */
if (mbox_read_from_line(mail_ctx) < 0)
return -1;
mbox_sync_update_header(mail_ctx);
ret = mbox_sync_try_rewrite(mail_ctx, move_diff);
if (ret < 0)
return -1;
if (ret > 0) {
/* rewrite successful, write From-line to
new location */
i_assert(move_diff > 0 ||
(off_t)mail_ctx->mail.from_offset >=
-move_diff);
mail_ctx->mail.from_offset += move_diff;
mail_ctx->mail.offset += move_diff;
if (mbox_write_from_line(mail_ctx) < 0)
return -1;
} else {
if (sync_ctx->dest_first_mail) {
/* didn't have enough space, move the offset
back so seeking into it doesn't fail */
mail_ctx->mail.from_offset = orig_from_offset;
}
}
} else if (mail_ctx->need_rewrite) {
mbox_sync_update_header(mail_ctx);
if (sync_ctx->delay_writes) {
/* mark it dirty and do it later */
mail_ctx->dirty = TRUE;
return 0;
}
if ((ret = mbox_sync_try_rewrite(mail_ctx, 0)) < 0)
return -1;
} else {
/* nothing to do */
return 0;
}
if (ret == 0 && sync_ctx->need_space_seq == 0) {
/* first mail with no space to write it */
sync_ctx->need_space_seq = sync_ctx->seq;
sync_ctx->space_diff = 0;
if (sync_ctx->expunged_space > 0) {
/* create dummy message to describe the expunged data */
struct mbox_sync_mail mail;
memset(&mail, 0, sizeof(mail));
mail.expunged = TRUE;
mail.offset = mail.from_offset =
(sync_ctx->dest_first_mail ? 1 : 0) +
mail_ctx->mail.from_offset -
sync_ctx->expunged_space;
mail.space = sync_ctx->expunged_space;
sync_ctx->space_diff = sync_ctx->expunged_space;
sync_ctx->expunged_space = 0;
i_assert(sync_ctx->space_diff < -mail_ctx->mail.space);
sync_ctx->need_space_seq--;
array_append(&sync_ctx->mails, &mail, 1);
}
}
return 0;
}
static int
mbox_sync_handle_missing_space(struct mbox_sync_mail_context *mail_ctx)
{
struct mbox_sync_context *sync_ctx = mail_ctx->sync_ctx;
uoff_t end_offset, move_diff, extra_space, needed_space;
uint32_t last_seq;
ARRAY_TYPE(keyword_indexes) keywords_copy;
i_assert(mail_ctx->mail.uid == 0 || mail_ctx->mail.space > 0 ||
mail_ctx->mail.offset == mail_ctx->hdr_offset);
if (array_is_created(&mail_ctx->mail.keywords)) {
/* mail's keywords are allocated from a pool that's cleared
for each mail. we'll need to copy it to something more
permanent. */
p_array_init(&keywords_copy, sync_ctx->saved_keywords_pool,
array_count(&mail_ctx->mail.keywords));
array_append_array(&keywords_copy, &mail_ctx->mail.keywords);
mail_ctx->mail.keywords = keywords_copy;
}
array_append(&sync_ctx->mails, &mail_ctx->mail, 1);
sync_ctx->space_diff += mail_ctx->mail.space;
if (sync_ctx->space_diff < 0) {
if (sync_ctx->expunged_space > 0) {
i_assert(sync_ctx->expunged_space ==
mail_ctx->mail.space);
sync_ctx->expunged_space = 0;
}
return 0;
}
/* we have enough space now */
if (mail_ctx->mail.uid == 0) {
/* this message was expunged. fill more or less of the space.
space_diff now consists of a negative "bytes needed" sum,
plus the expunged space of this message. so it contains how
many bytes of _extra_ space we have. */
i_assert(mail_ctx->mail.space >= sync_ctx->space_diff);
extra_space = MBOX_HEADER_PADDING *
(sync_ctx->seq - sync_ctx->need_space_seq + 1);
needed_space = mail_ctx->mail.space - sync_ctx->space_diff;
if ((uoff_t)sync_ctx->space_diff > needed_space + extra_space) {
/* don't waste too much on padding */
move_diff = needed_space + extra_space;
sync_ctx->expunged_space =
mail_ctx->mail.space - move_diff;
} else {
move_diff = mail_ctx->mail.space;
extra_space = sync_ctx->space_diff;
sync_ctx->expunged_space = 0;
}
last_seq = sync_ctx->seq - 1;
array_delete(&sync_ctx->mails,
array_count(&sync_ctx->mails) - 1, 1);
end_offset = mail_ctx->mail.from_offset;
} else {
/* this message gave enough space from headers. rewriting stops
at the end of this message's headers. */
sync_ctx->expunged_space = 0;
last_seq = sync_ctx->seq;
end_offset = mail_ctx->body_offset;
move_diff = 0;
extra_space = sync_ctx->space_diff;
}
mbox_sync_file_update_ext_modified(sync_ctx);
if (mbox_sync_rewrite(sync_ctx,
last_seq == sync_ctx->seq ? mail_ctx : NULL,
end_offset, move_diff, extra_space,
sync_ctx->need_space_seq, last_seq) < 0)
return -1;
update_from_offsets(sync_ctx);
/* mail_ctx may contain wrong data after rewrite, so make sure we
don't try to access it */
memset(mail_ctx, 0, sizeof(*mail_ctx));
sync_ctx->need_space_seq = 0;
sync_ctx->space_diff = 0;
array_clear(&sync_ctx->mails);
p_clear(sync_ctx->saved_keywords_pool);
return 0;
}
static int
mbox_sync_seek_to_seq(struct mbox_sync_context *sync_ctx, uint32_t seq)
{
struct mbox_mailbox *mbox = sync_ctx->mbox;
uoff_t old_offset;
uint32_t uid;
int ret;
bool deleted;
if (seq == 0) {
if (istream_raw_mbox_seek(mbox->mbox_stream, 0) < 0) {
mail_storage_set_error(&mbox->storage->storage,
MAIL_ERROR_NOTPOSSIBLE,
"Mailbox isn't a valid mbox file");
return -1;
}
seq++;
} else {
old_offset = istream_raw_mbox_get_start_offset(sync_ctx->input);
ret = mbox_file_seek(mbox, sync_ctx->sync_view, seq, &deleted);
if (ret < 0) {
if (deleted) {
mbox_sync_set_critical(sync_ctx,
"Message was expunged unexpectedly "
"in mbox file %s", mbox->path);
}
return -1;
}
if (ret == 0) {
if (istream_raw_mbox_seek(mbox->mbox_stream,
old_offset) < 0) {
mbox_sync_set_critical(sync_ctx,
"Error seeking back to original "
"offset %s in mbox file %s",
dec2str(old_offset), mbox->path);
return -1;
}
return 0;
}
}
if (seq <= 1)
uid = 0;
else
mail_index_lookup_uid(sync_ctx->sync_view, seq-1, &uid);
sync_ctx->prev_msg_uid = uid;
/* set to -1, since it's always increased later */
sync_ctx->seq = seq-1;
if (sync_ctx->seq == 0 &&
istream_raw_mbox_get_start_offset(sync_ctx->input) != 0) {
/* this mbox has pseudo mail which contains the X-IMAP header */
sync_ctx->seq++;
}
sync_ctx->idx_seq = seq;
sync_ctx->dest_first_mail = sync_ctx->seq == 0;
(void)istream_raw_mbox_get_body_offset(sync_ctx->input);
return 1;
}
static int
mbox_sync_seek_to_uid(struct mbox_sync_context *sync_ctx, uint32_t uid)
{
struct mail_index_view *sync_view = sync_ctx->sync_view;
uint32_t seq1, seq2;
const struct stat *st;
i_assert(!sync_ctx->index_reset);
if (!mail_index_lookup_seq_range(sync_view, uid, (uint32_t)-1,
&seq1, &seq2)) {
/* doesn't exist anymore, seek to end of file */
st = i_stream_stat(sync_ctx->file_input, TRUE);
if (st == NULL) {
mbox_set_syscall_error(sync_ctx->mbox,
"i_stream_stat()");
return -1;
}
if (istream_raw_mbox_seek(sync_ctx->mbox->mbox_stream,
st->st_size) < 0) {
mbox_sync_set_critical(sync_ctx,
"Error seeking to end of mbox file %s",
sync_ctx->mbox->path);
return -1;
}
sync_ctx->idx_seq =
mail_index_view_get_messages_count(sync_view) + 1;
return 1;
}
return mbox_sync_seek_to_seq(sync_ctx, seq1);
}
static int mbox_sync_partial_seek_next(struct mbox_sync_context *sync_ctx,
uint32_t next_uid, bool *partial,
bool *skipped_mails)
{
uint32_t messages_count, uid;
int ret;
i_assert(!sync_ctx->index_reset);
/* delete sync records up to next message. so if there's still
something left in array, it means the next message needs modifying */
index_sync_changes_delete_to(sync_ctx->sync_changes, next_uid);
if (index_sync_changes_have(sync_ctx->sync_changes))
return 1;
if (sync_ctx->hdr->first_recent_uid <= next_uid &&
!sync_ctx->mbox->ibox.keep_recent) {
/* we'll need to rewrite Status: O headers */
return 1;
}
uid = index_sync_changes_get_next_uid(sync_ctx->sync_changes);
if (sync_ctx->hdr->first_recent_uid < sync_ctx->hdr->next_uid &&
(uid > sync_ctx->hdr->first_recent_uid || uid == 0) &&
!sync_ctx->mbox->ibox.keep_recent) {
/* we'll need to rewrite Status: O headers */
uid = sync_ctx->hdr->first_recent_uid;
}
if (uid != 0) {
/* we can skip forward to next record which needs updating. */
if (uid != next_uid) {
*skipped_mails = TRUE;
next_uid = uid;
}
ret = mbox_sync_seek_to_uid(sync_ctx, next_uid);
} else {
/* if there's no sync records left, we can stop. except if
this is a dirty sync, check if there are new messages. */
if (!sync_ctx->mbox->mbox_sync_dirty)
return 0;
messages_count =
mail_index_view_get_messages_count(sync_ctx->sync_view);
if (sync_ctx->seq + 1 != messages_count) {
ret = mbox_sync_seek_to_seq(sync_ctx, messages_count);
*skipped_mails = TRUE;
} else {
ret = 1;
}
*partial = FALSE;
}
if (ret == 0) {
/* seek failed because the offset is dirty. just ignore and
continue from where we are now. */
*partial = FALSE;
ret = 1;
}
return ret;
}
static bool mbox_sync_uidvalidity_changed(struct mbox_sync_context *sync_ctx)
{
if (sync_ctx->base_uid_validity != 0 &&
sync_ctx->hdr->uid_validity != 0 &&
sync_ctx->base_uid_validity != sync_ctx->hdr->uid_validity) {
i_warning("UIDVALIDITY changed (%u -> %u) in mbox file %s",
sync_ctx->hdr->uid_validity,
sync_ctx->base_uid_validity,
sync_ctx->mbox->path);
sync_ctx->index_reset = TRUE;
return TRUE;
}
return FALSE;
}
static int mbox_sync_loop(struct mbox_sync_context *sync_ctx,
struct mbox_sync_mail_context *mail_ctx,
bool partial)
{
const struct mail_index_record *rec;
uint32_t uid, messages_count;
uoff_t offset;
int ret;
bool expunged, skipped_mails, uids_broken;
messages_count =
mail_index_view_get_messages_count(sync_ctx->sync_view);
/* always start from first message so we can read X-IMAP or
X-IMAPbase header */
ret = mbox_sync_seek_to_seq(sync_ctx, 0);
if (ret <= 0)
return ret;
if (sync_ctx->renumber_uids) {
/* expunge everything */
while (sync_ctx->idx_seq <= messages_count) {
mail_index_expunge(sync_ctx->t,
sync_ctx->idx_seq++);
}
}
skipped_mails = uids_broken = FALSE;
while ((ret = mbox_sync_read_next_mail(sync_ctx, mail_ctx)) > 0) {
uid = mail_ctx->mail.uid;
if (mail_ctx->seq == 1) {
if (mbox_sync_uidvalidity_changed(sync_ctx)) {
sync_ctx->mbox->mbox_sync_dirty = TRUE;
return 0;
}
}
if (mail_ctx->mail.uid_broken && partial) {
/* UID ordering problems, resync everything to make
sure we get everything right */
if (sync_ctx->mbox->mbox_sync_dirty)
return 0;
mbox_sync_set_critical(sync_ctx,
"UIDs broken with partial sync in mbox file %s",
sync_ctx->mbox->path);
sync_ctx->mbox->mbox_sync_dirty = TRUE;
return 0;
}
if (mail_ctx->mail.uid_broken)
uids_broken = TRUE;
if (mail_ctx->mail.pseudo)
uid = 0;
rec = NULL; ret = 1;
if (uid != 0) {
if (!mbox_sync_read_index_rec(sync_ctx, uid, &rec))
ret = 0;
}
if (ret == 0) {
/* UID found but it's broken */
uid = 0;
} else if (uid == 0 &&
!mail_ctx->mail.pseudo &&
(sync_ctx->delay_writes ||
sync_ctx->idx_seq <= messages_count)) {
/* If we can't use/store X-UID header, use MD5 sum.
Also check for existing MD5 sums when we're actually
able to write X-UIDs. */
sync_ctx->mbox->mbox_save_md5 = TRUE;
mbox_sync_find_index_md5(sync_ctx,
mail_ctx->hdr_md5_sum, &rec);
if (rec != NULL)
uid = mail_ctx->mail.uid = rec->uid;
}
/* get all sync records related to this message. with pseudo
message just get the first sync record so we can jump to
it with partial seeking. */
mbox_sync_read_index_syncs(sync_ctx,
mail_ctx->mail.pseudo ? 1 : uid,
&expunged);
if (mail_ctx->mail.pseudo) {
/* if it was set, it was for the next message */
expunged = FALSE;
} else {
if (rec == NULL) {
/* message wasn't found from index. we have to
read everything from now on, no skipping */
partial = FALSE;
}
}
if (uid == 0 && !mail_ctx->mail.pseudo) {
/* missing/broken X-UID. all the rest of the mails
need new UIDs. */
while (sync_ctx->idx_seq <= messages_count) {
mail_index_expunge(sync_ctx->t,
sync_ctx->idx_seq++);
}
if (sync_ctx->next_uid == (uint32_t)-1) {
/* oh no, we're out of UIDs. this shouldn't
happen normally, so just try to get it fixed
without crashing. */
mail_storage_set_critical(
&sync_ctx->mbox->storage->storage,
"Out of UIDs, renumbering them in mbox "
"file %s", sync_ctx->mbox->path);
sync_ctx->renumber_uids = TRUE;
return 0;
}
mail_ctx->need_rewrite = TRUE;
mail_ctx->mail.uid = sync_ctx->next_uid++;
}
sync_ctx->prev_msg_uid = mail_ctx->mail.uid;
if (!mail_ctx->mail.pseudo)
mail_ctx->mail.idx_seq = sync_ctx->idx_seq;
if (!expunged) {
if (!mail_ctx->mail.pseudo) T_BEGIN {
mbox_sync_update_flags(mail_ctx, rec);
} T_END;
if (mbox_sync_handle_header(mail_ctx) < 0)
return -1;
sync_ctx->dest_first_mail = FALSE;
} else {
mbox_sync_handle_expunge(mail_ctx);
}
if (!mail_ctx->mail.pseudo) {
if (!expunged) T_BEGIN {
mbox_sync_update_index(mail_ctx, rec);
} T_END;
sync_ctx->idx_seq++;
}
istream_raw_mbox_next(sync_ctx->input,
mail_ctx->mail.body_size);
offset = istream_raw_mbox_get_start_offset(sync_ctx->input);
if (sync_ctx->need_space_seq != 0) {
if (mbox_sync_handle_missing_space(mail_ctx) < 0)
return -1;
if (mbox_sync_seek(sync_ctx, offset) < 0)
return -1;
} else if (sync_ctx->expunged_space > 0) {
if (!expunged) {
/* move the body */
mbox_sync_file_update_ext_modified(sync_ctx);
if (mbox_move(sync_ctx,
mail_ctx->body_offset -
sync_ctx->expunged_space,
mail_ctx->body_offset,
mail_ctx->mail.body_size) < 0)
return -1;
if (mbox_sync_seek(sync_ctx, offset) < 0)
return -1;
}
} else if (partial) {
ret = mbox_sync_partial_seek_next(sync_ctx, uid + 1,
&partial,
&skipped_mails);
if (ret <= 0) {
if (ret < 0)
return -1;
break;
}
}
}
if (istream_raw_mbox_is_eof(sync_ctx->input)) {
/* rest of the messages in index don't exist -> expunge them */
while (sync_ctx->idx_seq <= messages_count)
mail_index_expunge(sync_ctx->t, sync_ctx->idx_seq++);
}
if (!skipped_mails)
sync_ctx->mbox->mbox_sync_dirty = FALSE;
if (uids_broken && sync_ctx->delay_writes) {
/* once we get around to writing the changes, we'll need to do
a full sync to avoid the "UIDs broken in partial sync"
error */
sync_ctx->mbox->mbox_sync_dirty = TRUE;
}
return 1;
}
static int mbox_write_pseudo(struct mbox_sync_context *sync_ctx)
{
string_t *str;
unsigned int uid_validity;
i_assert(sync_ctx->write_fd != -1);
uid_validity = sync_ctx->base_uid_validity != 0 ?
sync_ctx->base_uid_validity : sync_ctx->hdr->uid_validity;
i_assert(uid_validity != 0);
str = t_str_new(1024);
str_printfa(str, "%sDate: %s\n"
"From: Mail System Internal Data <MAILER-DAEMON@%s>\n"
"Subject: DON'T DELETE THIS MESSAGE -- FOLDER INTERNAL DATA"
"\nMessage-ID: <%s@%s>\n"
"X-IMAP: %u %010u\n"
"Status: RO\n"
"\n"
PSEUDO_MESSAGE_BODY
"\n",
mbox_from_create("MAILER_DAEMON", ioloop_time),
message_date_create(ioloop_time),
my_hostname, dec2str(ioloop_time), my_hostname,
uid_validity, sync_ctx->next_uid-1);
if (pwrite_full(sync_ctx->write_fd,
str_data(str), str_len(str), 0) < 0) {
if (!ENOSPACE(errno)) {
mbox_set_syscall_error(sync_ctx->mbox,
"pwrite_full()");
return -1;
}
/* out of disk space, truncate to empty */
if (ftruncate(sync_ctx->write_fd, 0) < 0)
mbox_set_syscall_error(sync_ctx->mbox, "ftruncate()");
}
sync_ctx->base_uid_last_offset = 0; /* don't bother calculating */
sync_ctx->base_uid_last = sync_ctx->next_uid-1;
return 0;
}
static int mbox_sync_handle_eof_updates(struct mbox_sync_context *sync_ctx,
struct mbox_sync_mail_context *mail_ctx)
{
const struct stat *st;
uoff_t file_size, offset, padding, trailer_size;
if (!istream_raw_mbox_is_eof(sync_ctx->input)) {
i_assert(sync_ctx->need_space_seq == 0);
i_assert(sync_ctx->expunged_space == 0);
return 0;
}
st = i_stream_stat(sync_ctx->file_input, TRUE);
if (st == NULL) {
mbox_set_syscall_error(sync_ctx->mbox, "i_stream_stat()");
return -1;
}
if (st->st_size < 0) {
/* Not a file - allow anyway */
return 0;
}
file_size = st->st_size;
if (file_size < sync_ctx->file_input->v_offset) {
mbox_sync_set_critical(sync_ctx,
"file size unexpectedly shrank in mbox file %s "
"(%"PRIuUOFF_T" vs %"PRIuUOFF_T")",
sync_ctx->mbox->path, file_size,
sync_ctx->file_input->v_offset);
return -1;
}
trailer_size = file_size - sync_ctx->file_input->v_offset;
i_assert(trailer_size <= 2);
if (sync_ctx->need_space_seq != 0) {
i_assert(sync_ctx->write_fd != -1);
i_assert(sync_ctx->space_diff < 0);
padding = MBOX_HEADER_PADDING *
(sync_ctx->seq - sync_ctx->need_space_seq + 1);
sync_ctx->space_diff -= padding;
i_assert(sync_ctx->expunged_space <= -sync_ctx->space_diff);
sync_ctx->space_diff += sync_ctx->expunged_space;
sync_ctx->expunged_space = 0;
if (mail_ctx->have_eoh && !mail_ctx->updated)
str_append_c(mail_ctx->header, '\n');
i_assert(sync_ctx->space_diff < 0);
if (file_set_size(sync_ctx->write_fd,
file_size + -sync_ctx->space_diff) < 0) {
mbox_set_syscall_error(sync_ctx->mbox,
"file_set_size()");
if (ftruncate(sync_ctx->write_fd, file_size) < 0) {
mbox_set_syscall_error(sync_ctx->mbox,
"ftruncate()");
}
return -1;
}
mbox_sync_file_updated(sync_ctx, FALSE);
if (mbox_sync_rewrite(sync_ctx, mail_ctx, file_size,
-sync_ctx->space_diff, padding,
sync_ctx->need_space_seq,
sync_ctx->seq) < 0)
return -1;
update_from_offsets(sync_ctx);
sync_ctx->need_space_seq = 0;
array_clear(&sync_ctx->mails);
p_clear(sync_ctx->saved_keywords_pool);
}
if (sync_ctx->expunged_space > 0) {
i_assert(sync_ctx->write_fd != -1);
mbox_sync_file_update_ext_modified(sync_ctx);
/* copy trailer, then truncate the file */
file_size = sync_ctx->last_stat.st_size;
if (file_size == (uoff_t)sync_ctx->expunged_space) {
/* everything deleted, the trailer_size still contains
the \n trailer though */
trailer_size = 0;
}
i_assert(file_size >= sync_ctx->expunged_space + trailer_size);
offset = file_size - sync_ctx->expunged_space - trailer_size;
i_assert(offset == 0 || offset > 31);
if (mbox_move(sync_ctx, offset,
offset + sync_ctx->expunged_space,
trailer_size) < 0)
return -1;
if (ftruncate(sync_ctx->write_fd,
offset + trailer_size) < 0) {
mbox_set_syscall_error(sync_ctx->mbox, "ftruncate()");
return -1;
}
if (offset == 0) {
if (mbox_write_pseudo(sync_ctx) < 0)
return -1;
}
sync_ctx->expunged_space = 0;
mbox_sync_file_updated(sync_ctx, FALSE);
}
return 0;
}
static int mbox_sync_update_index_header(struct mbox_sync_context *sync_ctx)
{
const struct stat *st;
uint32_t first_recent_uid;
st = i_stream_stat(sync_ctx->file_input, FALSE);
if (st == NULL) {
mbox_set_syscall_error(sync_ctx->mbox, "i_stream_stat()");
return -1;
}
if (sync_ctx->moved_offsets &&
((uint64_t)st->st_size == sync_ctx->hdr->sync_size ||
(uint64_t)st->st_size == sync_ctx->orig_size)) {
/* We moved messages inside the mbox file without changing
the file's size. If mtime doesn't change, another process
not using the same index file as us can't know that the file
was changed. So make sure the mtime changes. This should
happen rarely enough that the sleeping doesn't become a
performance problem.
Note that to do this perfectly safe we should do this wait
whenever mails are moved or expunged, regardless of whether
the file's size changed. That however could become a
performance problem and the consequences of being wrong are
quite minimal (an extra logged error message). */
while (sync_ctx->orig_mtime == st->st_mtime) {
usleep(500000);
if (utime(sync_ctx->mbox->path, NULL) < 0) {
mbox_set_syscall_error(sync_ctx->mbox,
"utime()");
return -1;
}
st = i_stream_stat(sync_ctx->file_input, FALSE);
if (st == NULL) {
mbox_set_syscall_error(sync_ctx->mbox,
"i_stream_stat()");
return -1;
}
}
}
/* only reason not to have UID validity at this point is if the file
is entirely empty. In that case just make up a new one if needed. */
i_assert(sync_ctx->base_uid_validity != 0 || st->st_size <= 0);
if (sync_ctx->base_uid_validity == 0) {
sync_ctx->base_uid_validity = sync_ctx->hdr->uid_validity != 0 ?
sync_ctx->hdr->uid_validity :
I_MIN((unsigned int)ioloop_time, 1);
}
if (sync_ctx->base_uid_validity != sync_ctx->hdr->uid_validity) {
mail_index_update_header(sync_ctx->t,
offsetof(struct mail_index_header, uid_validity),
&sync_ctx->base_uid_validity,
sizeof(sync_ctx->base_uid_validity), TRUE);
}
if (istream_raw_mbox_is_eof(sync_ctx->input) &&
sync_ctx->next_uid != sync_ctx->hdr->next_uid) {
i_assert(sync_ctx->next_uid != 0);
mail_index_update_header(sync_ctx->t,
offsetof(struct mail_index_header, next_uid),
&sync_ctx->next_uid, sizeof(sync_ctx->next_uid), FALSE);
}
if ((uint32_t)st->st_mtime != sync_ctx->hdr->sync_stamp &&
!sync_ctx->mbox->mbox_sync_dirty) {
uint32_t sync_stamp = st->st_mtime;
mail_index_update_header(sync_ctx->t,
offsetof(struct mail_index_header, sync_stamp),
&sync_stamp, sizeof(sync_stamp), TRUE);
}
if ((uint64_t)st->st_size != sync_ctx->hdr->sync_size &&
!sync_ctx->mbox->mbox_sync_dirty) {
uint64_t sync_size = st->st_size;
mail_index_update_header(sync_ctx->t,
offsetof(struct mail_index_header, sync_size),
&sync_size, sizeof(sync_size), TRUE);
}
first_recent_uid = !sync_ctx->mbox->ibox.keep_recent ? 0 :
sync_ctx->last_nonrecent_uid + 1;
if (sync_ctx->hdr->first_recent_uid < first_recent_uid) {
mail_index_update_header(sync_ctx->t,
offsetof(struct mail_index_header, first_recent_uid),
&first_recent_uid, sizeof(first_recent_uid), FALSE);
}
sync_ctx->mbox->mbox_dirty_stamp = st->st_mtime;
sync_ctx->mbox->mbox_dirty_size = st->st_size;
return 0;
}
static void mbox_sync_restart(struct mbox_sync_context *sync_ctx)
{
sync_ctx->base_uid_validity = 0;
sync_ctx->base_uid_last = 0;
sync_ctx->base_uid_last_offset = 0;
array_clear(&sync_ctx->mails);
p_clear(sync_ctx->saved_keywords_pool);
index_sync_changes_reset(sync_ctx->sync_changes);
mail_index_sync_reset(sync_ctx->index_sync_ctx);
mail_index_transaction_reset(sync_ctx->t);
if (sync_ctx->index_reset) {
mail_index_reset(sync_ctx->t);
sync_ctx->reset_hdr.next_uid = 1;
sync_ctx->hdr = &sync_ctx->reset_hdr;
index_mailbox_reset_uidvalidity(&sync_ctx->mbox->ibox);
}
sync_ctx->prev_msg_uid = 0;
sync_ctx->next_uid = sync_ctx->hdr->next_uid;
sync_ctx->idx_next_uid = sync_ctx->hdr->next_uid;
sync_ctx->seq = 0;
sync_ctx->idx_seq = 1;
sync_ctx->need_space_seq = 0;
sync_ctx->expunged_space = 0;
sync_ctx->space_diff = 0;
sync_ctx->dest_first_mail = TRUE;
sync_ctx->ext_modified = FALSE;
}
static int mbox_sync_do(struct mbox_sync_context *sync_ctx,
enum mbox_sync_flags flags)
{
struct mbox_sync_mail_context mail_ctx;
const struct stat *st;
unsigned int i;
int ret, partial;
st = i_stream_stat(sync_ctx->file_input, FALSE);
if (st == NULL) {
mbox_set_syscall_error(sync_ctx->mbox, "i_stream_stat()");
return -1;
}
sync_ctx->last_stat = *st;
sync_ctx->orig_size = st->st_size;
sync_ctx->orig_atime = st->st_atime;
sync_ctx->orig_mtime = st->st_mtime;
if ((flags & MBOX_SYNC_FORCE_SYNC) != 0) {
/* forcing a full sync. assume file has changed. */
partial = FALSE;
sync_ctx->mbox->mbox_sync_dirty = TRUE;
} else if ((uint32_t)st->st_mtime == sync_ctx->hdr->sync_stamp &&
(uint64_t)st->st_size == sync_ctx->hdr->sync_size) {
/* file is fully synced */
partial = TRUE;
sync_ctx->mbox->mbox_sync_dirty = FALSE;
} else if ((flags & MBOX_SYNC_UNDIRTY) != 0 ||
(uint64_t)st->st_size == sync_ctx->hdr->sync_size) {
/* we want to do full syncing. always do this if
file size hasn't changed but timestamp has. it most
likely means that someone had modified some header
and we probably want to know about it */
partial = FALSE;
sync_ctx->mbox->mbox_sync_dirty = TRUE;
} else {
/* see if we can delay syncing the whole file.
normally we only notice expunges and appends
in partial syncing. */
partial = TRUE;
sync_ctx->mbox->mbox_sync_dirty = TRUE;
}
mbox_sync_restart(sync_ctx);
for (i = 0; i < 3; i++) {
ret = mbox_sync_loop(sync_ctx, &mail_ctx, partial);
if (ret > 0)
break;
if (ret < 0)
return -1;
/* partial syncing didn't work, do it again. we get here
also if we ran out of UIDs. */
i_assert(sync_ctx->mbox->mbox_sync_dirty);
mbox_sync_restart(sync_ctx);
partial = FALSE;
}
if (mbox_sync_handle_eof_updates(sync_ctx, &mail_ctx) < 0)
return -1;
/* only syncs left should be just appends (and their updates)
which weren't synced yet for some reason (crash). we'll just
ignore them, as we've overwritten them above. */
index_sync_changes_reset(sync_ctx->sync_changes);
if (mbox_sync_update_index_header(sync_ctx) < 0)
return -1;
return 0;
}
int mbox_sync_has_changed(struct mbox_mailbox *mbox, bool leave_dirty)
{
bool empty;
return mbox_sync_has_changed_full(mbox, leave_dirty, &empty);
}
int mbox_sync_has_changed_full(struct mbox_mailbox *mbox, bool leave_dirty,
bool *empty_r)
{
const struct mail_index_header *hdr;
const struct stat *st;
struct stat statbuf;
if (mbox->mbox_file_stream != NULL && mbox->mbox_fd == -1) {
/* read-only stream */
st = i_stream_stat(mbox->mbox_file_stream, FALSE);
if (st == NULL) {
mbox_set_syscall_error(mbox, "i_stream_stat()");
return -1;
}
} else {
if (stat(mbox->path, &statbuf) < 0) {
mbox_set_syscall_error(mbox, "stat()");
return -1;
}
st = &statbuf;
}
*empty_r = st->st_size == 0;
hdr = mail_index_get_header(mbox->ibox.view);
if ((uint32_t)st->st_mtime == hdr->sync_stamp &&
(uint64_t)st->st_size == hdr->sync_size) {
/* fully synced */
mbox->mbox_sync_dirty = FALSE;
return 0;
}
if (!mbox->mbox_sync_dirty || !leave_dirty) {
mbox->mbox_sync_dirty = TRUE;
return 1;
}
return st->st_mtime != mbox->mbox_dirty_stamp ||
st->st_size != mbox->mbox_dirty_size;
}
static void mbox_sync_context_free(struct mbox_sync_context *sync_ctx)
{
index_sync_changes_deinit(&sync_ctx->sync_changes);
if (sync_ctx->index_sync_ctx != NULL)
mail_index_sync_rollback(&sync_ctx->index_sync_ctx);
pool_unref(&sync_ctx->mail_keyword_pool);
pool_unref(&sync_ctx->saved_keywords_pool);
str_free(&sync_ctx->header);
str_free(&sync_ctx->from_line);
array_free(&sync_ctx->mails);
}
static int mbox_sync_int(struct mbox_mailbox *mbox, enum mbox_sync_flags flags)
{
struct mail_index_sync_ctx *index_sync_ctx;
struct mail_index_view *sync_view;
struct mail_index_transaction *trans;
struct mbox_sync_context sync_ctx;
enum mail_index_sync_flags sync_flags;
unsigned int lock_id = 0;
int ret, changed;
bool delay_writes;
delay_writes = mbox->mbox_readonly ||
((flags & MBOX_SYNC_REWRITE) == 0 &&
getenv("MBOX_LAZY_WRITES") != NULL);
if (!mbox->mbox_do_dirty_syncs)
flags |= MBOX_SYNC_UNDIRTY;
if ((flags & MBOX_SYNC_LOCK_READING) != 0) {
if (mbox_lock(mbox, F_RDLCK, &lock_id) <= 0)
return -1;
}
if ((flags & MBOX_SYNC_HEADER) != 0 ||
(flags & MBOX_SYNC_FORCE_SYNC) != 0)
changed = 1;
else {
bool leave_dirty = (flags & MBOX_SYNC_UNDIRTY) == 0;
if ((changed = mbox_sync_has_changed(mbox, leave_dirty)) < 0) {
if ((flags & MBOX_SYNC_LOCK_READING) != 0)
(void)mbox_unlock(mbox, lock_id);
return -1;
}
}
if ((flags & MBOX_SYNC_LOCK_READING) != 0) {
/* we just want to lock it for reading. if mbox hasn't been
modified don't do any syncing. */
if (!changed)
return 0;
/* have to sync to make sure offsets have stayed the same */
(void)mbox_unlock(mbox, lock_id);
lock_id = 0;
}
/* reopen input stream to make sure it has nothing buffered */
mbox_file_close_stream(mbox);
again:
if (changed) {
/* we're most likely modifying the mbox while syncing, just
lock it for writing immediately. the mbox must be locked
before index syncing is started to avoid deadlocks, so we
don't have much choice either (well, easy ones anyway). */
int lock_type = mbox->mbox_readonly ? F_RDLCK : F_WRLCK;
int ret;
if ((ret = mbox_lock(mbox, lock_type, &lock_id)) <= 0) {
if (ret == 0 || lock_type == F_RDLCK)
return -1;
/* try as read-only */
if (mbox_lock(mbox, F_RDLCK, &lock_id) <= 0)
return -1;
mbox->mbox_readonly = TRUE;
}
}
sync_flags = 0;
if (!mbox->ibox.keep_recent)
sync_flags |= MAIL_INDEX_SYNC_FLAG_DROP_RECENT;
if ((flags & MBOX_SYNC_REWRITE) != 0)
sync_flags |= MAIL_INDEX_SYNC_FLAG_FLUSH_DIRTY;
if ((flags & MBOX_SYNC_LAST_COMMIT) != 0) {
ret = mail_index_sync_begin_to(mbox->ibox.index,
&index_sync_ctx, &sync_view, &trans,
mbox->ibox.commit_log_file_seq,
mbox->ibox.commit_log_file_offset, sync_flags);
} else {
ret = mail_index_sync_begin(mbox->ibox.index, &index_sync_ctx,
&sync_view, &trans, sync_flags);
}
if (ret <= 0) {
if (ret < 0)
mail_storage_set_index_error(&mbox->ibox);
if (lock_id != 0)
(void)mbox_unlock(mbox, lock_id);
return ret;
}
if (!mbox->ibox.keep_recent) {
/* see if we need to drop recent flags */
sync_ctx.hdr = mail_index_get_header(sync_view);
if (sync_ctx.hdr->first_recent_uid < sync_ctx.hdr->next_uid)
changed = 1;
}
if (!changed && !mail_index_sync_have_more(index_sync_ctx)) {
/* nothing to do */
nothing_to_do:
if (lock_id != 0)
(void)mbox_unlock(mbox, lock_id);
/* index may need to do internal syncing though, so commit
instead of rollbacking. */
if (mail_index_sync_commit(&index_sync_ctx) < 0) {
mail_storage_set_index_error(&mbox->ibox);
return -1;
}
return 0;
}
memset(&sync_ctx, 0, sizeof(sync_ctx));
sync_ctx.mbox = mbox;
sync_ctx.hdr = mail_index_get_header(sync_view);
sync_ctx.from_line = str_new(default_pool, 256);
sync_ctx.header = str_new(default_pool, 4096);
sync_ctx.index_sync_ctx = index_sync_ctx;
sync_ctx.sync_view = sync_view;
sync_ctx.t = trans;
sync_ctx.mail_keyword_pool =
pool_alloconly_create("mbox keywords", 256);
sync_ctx.saved_keywords_pool =
pool_alloconly_create("mbox saved keywords", 4096);
/* make sure we've read the latest keywords in index */
(void)mail_index_get_keywords(mbox->ibox.index);
i_array_init(&sync_ctx.mails, 64);
sync_ctx.flags = flags;
sync_ctx.delay_writes = delay_writes || sync_ctx.mbox->mbox_readonly;
sync_ctx.sync_changes =
index_sync_changes_init(&mbox->ibox, index_sync_ctx,
sync_view, trans,
sync_ctx.delay_writes);
if (!changed && delay_writes) {
/* if we have only flag changes, we don't need to open the
mbox file */
bool expunged;
uint32_t uid;
mbox_sync_read_index_syncs(&sync_ctx, 1, &expunged);
uid = expunged ? 1 :
index_sync_changes_get_next_uid(sync_ctx.sync_changes);
if (uid == 0) {
sync_ctx.index_sync_ctx = NULL;
mbox_sync_context_free(&sync_ctx);
goto nothing_to_do;
}
}
if (lock_id == 0) {
/* ok, we have something to do but no locks. we'll have to
restart syncing to avoid deadlocking. */
mbox_sync_context_free(&sync_ctx);
changed = 1;
goto again;
}
if (mbox_file_open_stream(mbox) < 0) {
mbox_sync_context_free(&sync_ctx);
(void)mbox_unlock(mbox, lock_id);
return -1;
}
sync_ctx.file_input = sync_ctx.mbox->mbox_file_stream;
sync_ctx.input = sync_ctx.mbox->mbox_stream;
sync_ctx.write_fd = sync_ctx.mbox->mbox_lock_type != F_WRLCK ? -1 :
sync_ctx.mbox->mbox_fd;
ret = mbox_sync_do(&sync_ctx, flags);
if (ret < 0)
mail_index_sync_rollback(&index_sync_ctx);
else if (mail_index_sync_commit(&index_sync_ctx) < 0) {
mail_storage_set_index_error(&mbox->ibox);
ret = -1;
} else {
mbox->ibox.commit_log_file_seq = 0;
mbox->ibox.commit_log_file_offset = 0;
}
sync_ctx.t = NULL;
sync_ctx.index_sync_ctx = NULL;
if (sync_ctx.base_uid_last != sync_ctx.next_uid-1 &&
ret == 0 && !sync_ctx.delay_writes &&
sync_ctx.base_uid_last_offset != 0) {
/* Rewrite uid_last in X-IMAPbase header if we've seen it
(ie. the file isn't empty) */
ret = mbox_rewrite_base_uid_last(&sync_ctx);
}
if (ret == 0 && mbox->mbox_fd != -1 && mbox->ibox.keep_recent &&
!sync_ctx.mbox->mbox_readonly) {
/* try to set atime back to its original value */
struct utimbuf buf;
struct stat st;
if (fstat(mbox->mbox_fd, &st) < 0)
mbox_set_syscall_error(mbox, "fstat()");
else {
buf.modtime = st.st_mtime;
buf.actime = sync_ctx.orig_atime;
if (utime(mbox->path, &buf) < 0)
mbox_set_syscall_error(mbox, "utime()");
}
}
i_assert(lock_id != 0);
if ((mbox->storage->storage.flags &
MAIL_STORAGE_FLAG_NFS_FLUSH_STORAGE) != 0 && mbox->mbox_fd != -1) {
if (fdatasync(mbox->mbox_fd) < 0) {
mbox_set_syscall_error(mbox, "fdatasync()");
ret = -1;
}
}
if (mbox->mbox_lock_type != F_RDLCK) {
/* drop to read lock */
unsigned int read_lock_id = 0;
if (mbox_lock(mbox, F_RDLCK, &read_lock_id) <= 0)
ret = -1;
else {
if (mbox_unlock(mbox, lock_id) < 0)
ret = -1;
lock_id = read_lock_id;
}
}
if ((flags & MBOX_SYNC_LOCK_READING) == 0) {
if (mbox_unlock(mbox, lock_id) < 0)
ret = -1;
}
mbox_sync_context_free(&sync_ctx);
return ret;
}
int mbox_sync(struct mbox_mailbox *mbox, enum mbox_sync_flags flags)
{
int ret;
mbox->syncing = TRUE;
ret = mbox_sync_int(mbox, flags);
mbox->syncing = FALSE;
if (mbox->ibox.box.v.sync_notify != NULL)
mbox->ibox.box.v.sync_notify(&mbox->ibox.box, 0, 0);
return ret;
}
struct mailbox_sync_context *
mbox_storage_sync_init(struct mailbox *box, enum mailbox_sync_flags flags)
{
struct mbox_mailbox *mbox = (struct mbox_mailbox *)box;
enum mbox_sync_flags mbox_sync_flags = 0;
int ret = 0;
if (!box->opened)
index_storage_mailbox_open(&mbox->ibox);
if (index_mailbox_want_full_sync(&mbox->ibox, flags)) {
if ((flags & MAILBOX_SYNC_FLAG_FULL_READ) != 0 &&
!mbox->mbox_very_dirty_syncs)
mbox_sync_flags |= MBOX_SYNC_UNDIRTY;
if ((flags & MAILBOX_SYNC_FLAG_FULL_WRITE) != 0)
mbox_sync_flags |= MBOX_SYNC_REWRITE;
ret = mbox_sync(mbox, mbox_sync_flags);
}
return index_mailbox_sync_init(box, flags, ret < 0);
}