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fix UID assignment with some non-UIDPLUS servers

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the seznam.cz IMAP server seems very eager to send UIDNEXT responses
despite not supporting UIDPLUS. this doesn't appear to be a particularly
sensible combination, but it's valid nonetheless.

however, that means that we need to save the UIDNEXT value before we
start storing messages, lest imap_find_new_msgs() will simply overlook
them. we do that outside the driver, in an already present field - this
actually makes the main path more consistent with the journal recovery
path.

analysis by Tomas Tintera <trosos@seznam.cz>.

REFMAIL: 20141220215032.GA10115@kyvadlo.trosos.seznam.cz
This commit is contained in:
Oswald Buddenhagen 2015-01-11 14:29:19 +01:00
parent 958af473a0
commit 2fa75cf159
4 changed files with 19 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/driver.h
View File

@ -192,7 +192,7 @@ struct driver {
/* Index the messages which have newly appeared in the mailbox, including their
* temporary UID headers. This is needed if store_msg() does not guarantee returning
* a UID; otherwise the driver needs to implement only the OPEN_FIND flag. */
void (*find_new_msgs)( store_t *ctx,
void (*find_new_msgs)( store_t *ctx, int newuid,
void (*cb)( int sts, void *aux ), void *aux );
/* Add/remove the named flags to/from the given message. The message may be either

21
src/drv_imap.c
View File

@ -153,6 +153,11 @@ struct imap_cmd_out_uid {
int out_uid;
};
struct imap_cmd_find_new {
struct imap_cmd_simple gen;
int uid;
};
struct imap_cmd_refcounted_state {
void (*callback)( int sts, void *aux );
void *callback_aux;
@ -2158,28 +2163,30 @@ imap_store_msg_p2( imap_store_t *ctx ATTR_UNUSED, struct imap_cmd *cmd, int resp
static void imap_find_new_msgs_p2( imap_store_t *, struct imap_cmd *, int );
static void
imap_find_new_msgs( store_t *gctx,
imap_find_new_msgs( store_t *gctx, int newuid,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
struct imap_cmd_simple *cmd;
struct imap_cmd_find_new *cmd;
INIT_IMAP_CMD(imap_cmd_simple, cmd, cb, aux)
imap_exec( (imap_store_t *)ctx, &cmd->gen, imap_find_new_msgs_p2, "CHECK" );
INIT_IMAP_CMD_X(imap_cmd_find_new, cmd, cb, aux)
cmd->uid = newuid;
imap_exec( (imap_store_t *)ctx, &cmd->gen.gen, imap_find_new_msgs_p2, "CHECK" );
}
static void
imap_find_new_msgs_p2( imap_store_t *ctx, struct imap_cmd *gcmd, int response )
{
struct imap_cmd_simple *cmdp = (struct imap_cmd_simple *)gcmd, *cmd;
struct imap_cmd_find_new *cmdp = (struct imap_cmd_find_new *)gcmd;
struct imap_cmd_simple *cmd;
if (response != RESP_OK) {
imap_done_simple_box( ctx, gcmd, response );
return;
}
INIT_IMAP_CMD(imap_cmd_simple, cmd, cmdp->callback, cmdp->callback_aux)
INIT_IMAP_CMD(imap_cmd_simple, cmd, cmdp->gen.callback, cmdp->gen.callback_aux)
imap_exec( (imap_store_t *)ctx, &cmd->gen, imap_done_simple_box,
"UID FETCH %d:1000000000 (UID BODY.PEEK[HEADER.FIELDS (X-TUID)])", ctx->gen.uidnext );
"UID FETCH %d:1000000000 (UID BODY.PEEK[HEADER.FIELDS (X-TUID)])", cmdp->uid );
}
/******************* imap_list *******************/

2
src/drv_maildir.c
View File

@ -1292,7 +1292,7 @@ maildir_store_msg( store_t *gctx, msg_data_t *data, int to_trash,
}
static void
maildir_find_new_msgs( store_t *gctx ATTR_UNUSED,
maildir_find_new_msgs( store_t *gctx ATTR_UNUSED, int newuid ATTR_UNUSED,
void (*cb)( int sts, void *aux ) ATTR_UNUSED, void *aux ATTR_UNUSED )
{
assert( !"maildir_find_new_msgs is not supposed to be called" );

5
src/sync.c
View File

@ -1506,7 +1506,8 @@ box_loaded( int sts, void *aux )
if (UseFSync)
fdatasync( fileno( svars->jfp ) );
for (t = 0; t < 2; t++) {
Fprintf( svars->jfp, "%c %d\n", "{}"[t], svars->ctx[t]->uidnext );
svars->newuid[t] = svars->ctx[t]->uidnext;
Fprintf( svars->jfp, "%c %d\n", "{}"[t], svars->newuid[t] );
for (tmsg = svars->ctx[1-t]->msgs; tmsg; tmsg = tmsg->next) {
if ((srec = tmsg->srec) && srec->tuid[0]) {
svars->new_total[t]++;
@ -1604,7 +1605,7 @@ msgs_copied( sync_vars_t *svars, int t )
if (svars->state[t] & ST_FIND_NEW) {
debug( "finding just copied messages on %s\n", str_ms[t] );
svars->drv[t]->find_new_msgs( svars->ctx[t], msgs_found_new, AUX );
svars->drv[t]->find_new_msgs( svars->ctx[t], svars->newuid[t], msgs_found_new, AUX );
} else {
msgs_new_done( svars, t );
}