/* create a downgraded index file in cyrus.index. We don't copy back
* expunged messages, sorry */
static int dump_index(struct mailbox *mailbox, int oldversion,
struct seqset *expunged_seq, int first, int sync,
struct protstream *pin, struct protstream *pout)
{
char oldname[MAX_MAILBOX_PATH];
const char *fname;
int oldindex_fd = -1;
indexbuffer_t headerbuf;
indexbuffer_t recordbuf;
char *hbuf = (char *)headerbuf.buf;
char *rbuf = (char *)recordbuf.buf;
int header_size;
int record_size;
int n, r;
if (oldversion == 6) {
header_size = 76;
record_size = 60;
}
else if (oldversion == 7) {
header_size = 76;
record_size = 72;
}
else if (oldversion == 8) {
header_size = 92;
record_size = 80;
}
else if (oldversion == 9) {
header_size = 96;
record_size = 80;
}
else if (oldversion == 10) {
header_size = 96;
record_size = 88;
}
else {
return IMAP_MAILBOX_BADFORMAT;
}
fname = mailbox_meta_fname(mailbox, META_INDEX);
snprintf(oldname, MAX_MAILBOX_PATH, "%s.OLD", fname);
oldindex_fd = open(oldname, O_RDWR|O_TRUNC|O_CREAT, 0666);
if (oldindex_fd == -1) goto fail;
downgrade_header(&mailbox->i, hbuf, oldversion,
header_size, record_size);
/* Write header - everything we'll say */
n = retry_write(oldindex_fd, hbuf, header_size);
if (n == -1) goto fail;
struct mailbox_iter *iter = mailbox_iter_init(mailbox, 0, ITER_SKIP_UNLINKED);
const message_t *msg;
while ((msg = mailbox_iter_step(iter))) {
const struct index_record *record = msg_record(msg);
/* we have to make sure expunged records don't get the
* file copied, or a reconstruct could bring them back
* to life! It we're not creating an expunged file... */
if (record->system_flags & FLAG_EXPUNGED) {
if (oldversion < 9) seqset_add(expunged_seq, record->uid, 1);
continue;
}
/* not making sure exists matches, we do trust a bit */
downgrade_record(record, rbuf, oldversion);
n = retry_write(oldindex_fd, rbuf, record_size);
if (n == -1) goto fail;
}
mailbox_iter_done(&iter);
close(oldindex_fd);
r = dump_file(first, sync, pin, pout, oldname, "cyrus.index", NULL, 0);
unlink(oldname);
if (r) return r;
/* create cyrus.expunge */
if (oldversion > 8 && mailbox->i.num_records > mailbox->i.exists) {
int nexpunge = mailbox->i.num_records - mailbox->i.exists;
fname = mailbox_meta_fname(mailbox, META_EXPUNGE);
snprintf(oldname, MAX_MAILBOX_PATH, "%s.OLD", fname);
oldindex_fd = open(oldname, O_RDWR|O_TRUNC|O_CREAT, 0666);
if (oldindex_fd == -1) goto fail;
header_set_num_records(hbuf, nexpunge);
/* Write header - everything we'll say */
n = retry_write(oldindex_fd, hbuf, header_size);
if (n == -1) goto fail;
iter = mailbox_iter_init(mailbox, 0, ITER_SKIP_UNLINKED);
while ((msg = mailbox_iter_step(iter))) {
const struct index_record *record = msg_record(msg);
/* ignore non-expunged records */
if (!(record->system_flags & FLAG_EXPUNGED))
continue;
downgrade_record(record, rbuf, oldversion);
n = retry_write(oldindex_fd, rbuf, record_size);
if (n == -1) goto fail;
}
close(oldindex_fd);
r = dump_file(first, sync, pin, pout, oldname, "cyrus.expunge", NULL, 0);
unlink(oldname);
if (r) return r;
}
return 0;
fail:
if (oldindex_fd != -1)
close(oldindex_fd);
unlink(oldname);
return IMAP_IOERROR;
}
/* create a downgraded index file in cyrus.index. We don't copy back
* expunged messages, sorry */
static int dump_index(struct mailbox *mailbox, int oldversion,
struct seqset *expunged_seq, int first, int sync,
struct protstream *pin, struct protstream *pout)
{
char oldname[MAX_MAILBOX_PATH];
const char *fname;
int oldindex_fd = -1;
indexbuffer_t headerbuf;
indexbuffer_t recordbuf;
char *hbuf = (char *)headerbuf.buf;
char *rbuf = (char *)recordbuf.buf;
int header_size;
int record_size;
int n, r;
struct index_record record;
unsigned recno;
if (oldversion == 6) {
header_size = 76;
record_size = 60;
}
else if (oldversion == 7) {
header_size = 76;
record_size = 72;
}
else if (oldversion == 8) {
header_size = 92;
record_size = 80;
}
else if (oldversion == 9) {
header_size = 96;
record_size = 80;
}
else if (oldversion == 10) {
header_size = 96;
record_size = 88;
}
else {
return IMAP_MAILBOX_BADFORMAT;
}
fname = mailbox_meta_fname(mailbox, META_INDEX);
snprintf(oldname, MAX_MAILBOX_PATH, "%s.OLD", fname);
oldindex_fd = open(oldname, O_RDWR|O_TRUNC|O_CREAT, 0666);
if (oldindex_fd == -1) goto fail;
downgrade_header(&mailbox->i, hbuf, oldversion,
header_size, record_size);
/* Write header - everything we'll say */
n = retry_write(oldindex_fd, hbuf, header_size);
if (n == -1) goto fail;
for (recno = 1; recno <= mailbox->i.num_records; recno++) {
if (mailbox_read_index_record(mailbox, recno, &record))
goto fail;
/* we don't care about unlinked records at all */
if (record.system_flags & FLAG_UNLINKED)
continue;
/* we have to make sure expunged records don't get the
* file copied, or a reconstruct could bring them back
* to life! It we're not creating an expunged file... */
if (record.system_flags & FLAG_EXPUNGED) {
if (oldversion < 9) seqset_add(expunged_seq, record.uid, 1);
continue;
}
/* not making sure exists matches, we do trust a bit */
downgrade_record(&record, rbuf, oldversion);
n = retry_write(oldindex_fd, rbuf, record_size);
if (n == -1) goto fail;
}
close(oldindex_fd);
r = dump_file(first, sync, pin, pout, oldname, "cyrus.index");
unlink(oldname);
if (r) return r;
/* create cyrus.expunge */
if (oldversion > 8 && mailbox->i.num_records > mailbox->i.exists) {
int nexpunge = mailbox->i.num_records - mailbox->i.exists;
fname = mailbox_meta_fname(mailbox, META_EXPUNGE);
snprintf(oldname, MAX_MAILBOX_PATH, "%s.OLD", fname);
oldindex_fd = open(oldname, O_RDWR|O_TRUNC|O_CREAT, 0666);
if (oldindex_fd == -1) goto fail;
*((bit32 *)(hbuf+OFFSET_NUM_RECORDS)) = htonl(nexpunge);
/* Write header - everything we'll say */
n = retry_write(oldindex_fd, hbuf, header_size);
if (n == -1) goto fail;
for (recno = 1; recno <= mailbox->i.num_records; recno++) {
if (mailbox_read_index_record(mailbox, recno, &record))
goto fail;
/* ignore non-expunged records */
if (!(record.system_flags & FLAG_EXPUNGED))
continue;
downgrade_record(&record, rbuf, oldversion);
n = retry_write(oldindex_fd, rbuf, record_size);
if (n == -1) goto fail;
}
close(oldindex_fd);
r = dump_file(first, sync, pin, pout, oldname, "cyrus.expunge");
unlink(oldname);
if (r) return r;
}
return 0;
fail:
if (oldindex_fd != -1)
close(oldindex_fd);
unlink(oldname);
return IMAP_IOERROR;
}
