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actually implement imap_commit_cmds()

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delay reporting success of STORE FLAGS until a subsequent CHECK
succeeds.

this fixes (inverse flag change propagation) and (deletes not being
propagated) after an interruption due to prematurely logged flag
updates.
This commit is contained in:
Oswald Buddenhagen 2020-07-28 16:14:00 +02:00
parent 70bad66129
commit cfaa4848dd
2 changed files with 51 additions and 12 deletions
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53
src/drv_imap.c
View File

@ -129,9 +129,10 @@ struct imap_store {
string_list_t *auth_mechs;
parse_list_state_t parse_list_sts;
/* command queue */
int nexttag, num_in_progress;
imap_cmd_t *pending, **pending_append;
imap_cmd_t *in_progress, **in_progress_append;
imap_cmd_t *wait_check, **wait_check_append;
int nexttag, num_in_progress, num_wait_check;
uint buffer_mem; /* memory currently occupied by buffers in the queue */
/* Used during sequential operations like connect */
@ -169,6 +170,7 @@ struct imap_cmd {
uint data_len;
uint uid; /* to identify fetch responses */
char high_prio; /* if command is queued, put it at the front of the queue. */
char wait_check; // Don't report success until subsequent CHECK success.
char to_trash; /* we are storing to trash, not current. */
char create; /* create the mailbox if we get an error which suggests so. */
char failok; /* Don't complain about NO response. */
@ -286,6 +288,8 @@ new_imap_cmd( uint size )
static void
done_imap_cmd( imap_store_t *ctx, imap_cmd_t *cmd, int response )
{
if (cmd->param.wait_check)
ctx->num_wait_check--;
cmd->param.done( ctx, cmd, response );
if (cmd->param.data) {
free( cmd->param.data );
@ -405,6 +409,18 @@ flush_imap_cmds( imap_store_t *ctx )
}
}
static void
finalize_checked_imap_cmds( imap_store_t *ctx, int resp )
{
imap_cmd_t *cmd;
while ((cmd = ctx->wait_check)) {
if (!(ctx->wait_check = cmd->next))
ctx->wait_check_append = &ctx->wait_check;
done_imap_cmd( ctx, cmd, resp );
}
}
static void
cancel_pending_imap_cmds( imap_store_t *ctx )
{
@ -438,6 +454,8 @@ submit_imap_cmd( imap_store_t *ctx, imap_cmd_t *cmd )
assert( cmd );
assert( cmd->param.done );
if (cmd->param.wait_check)
ctx->num_wait_check++;
if ((ctx->pending && !cmd->param.high_prio) || !cmd_sendable( ctx, cmd )) {
if (ctx->pending && cmd->param.high_prio) {
cmd->next = ctx->pending;
@ -1600,7 +1618,13 @@ imap_socket_read( void *aux )
imap_ref( ctx );
if (resp == RESP_CANCEL)
imap_invoke_bad_callback( ctx );
if (resp == RESP_OK && cmdp->param.wait_check) {
cmdp->next = NULL;
*ctx->wait_check_append = cmdp;
ctx->wait_check_append = &cmdp->next;
} else {
done_imap_cmd( ctx, cmdp, resp );
}
if (imap_deref( ctx ))
return;
if (ctx->canceling && !ctx->in_progress) {
@ -1623,6 +1647,7 @@ get_cmd_result_p2( imap_store_t *ctx, imap_cmd_t *cmd, int response )
if (response != RESP_OK) {
done_imap_cmd( ctx, ocmd, response );
} else {
assert( !ocmd->param.wait_check );
ctx->uidnext = 1;
if (ocmd->param.to_trash)
ctx->trashnc = TrashKnown;
@ -1643,6 +1668,7 @@ imap_cancel_store( store_t *gctx )
sasl_dispose( &ctx->sasl );
#endif
socket_close( &ctx->conn );
finalize_checked_imap_cmds( ctx, RESP_CANCEL );
cancel_sent_imap_cmds( ctx );
cancel_pending_imap_cmds( ctx );
free( ctx->ns_prefix );
@ -1699,6 +1725,8 @@ imap_free_store( store_t *gctx )
{
imap_store_t *ctx = (imap_store_t *)gctx;
assert( !ctx->pending && !ctx->in_progress && !ctx->wait_check );
free_generic_messages( ctx->msgs );
ctx->msgs = NULL;
imap_set_bad_callback( gctx, imap_cancel_unowned, gctx );
@ -1801,6 +1829,7 @@ imap_alloc_store( store_conf_t *conf, const char *label )
imap_socket_read, (void (*)(void *))flush_imap_cmds, ctx );
ctx->in_progress_append = &ctx->in_progress;
ctx->pending_append = &ctx->pending;
ctx->wait_check_append = &ctx->wait_check;
gotsrv:
ctx->gen.driver = &imap_driver;
@ -2457,6 +2486,8 @@ imap_select_box( store_t *gctx, const char *name )
{
imap_store_t *ctx = (imap_store_t *)gctx;
assert( !ctx->pending && !ctx->in_progress && !ctx->wait_check );
free_generic_messages( ctx->msgs );
ctx->msgs = NULL;
ctx->msgapp = &ctx->msgs;
@ -2873,7 +2904,9 @@ imap_flags_helper( imap_store_t *ctx, uint uid, char what, int flags,
char buf[256];
buf[imap_make_flags( flags, buf )] = 0;
imap_exec( ctx, imap_refcounted_new_cmd( &sts->gen ), imap_set_flags_p2,
imap_cmd_t *cmd = imap_refcounted_new_cmd( &sts->gen );
cmd->param.wait_check = 1;
imap_exec( ctx, cmd, imap_set_flags_p2,
"UID STORE %u %cFLAGS.SILENT %s", uid, what, buf );
}
@ -2934,6 +2967,8 @@ imap_close_box( store_t *gctx,
{
imap_store_t *ctx = (imap_store_t *)gctx;
assert( !ctx->num_wait_check );
if (ctx->gen.conf->trash && CAP(UIDPLUS)) {
INIT_REFCOUNTED_STATE(imap_expunge_state_t, sts, cb, aux)
message_t *msg, *fmsg, *nmsg;
@ -3216,6 +3251,7 @@ imap_cancel_cmds( store_t *gctx,
{
imap_store_t *ctx = (imap_store_t *)gctx;
finalize_checked_imap_cmds( ctx, RESP_CANCEL );
cancel_pending_imap_cmds( ctx );
if (ctx->in_progress) {
ctx->canceling = 1;
@ -3228,10 +3264,21 @@ imap_cancel_cmds( store_t *gctx,
/******************* imap_commit_cmds *******************/
static void imap_commit_cmds_p2( imap_store_t *, imap_cmd_t *, int );
static void
imap_commit_cmds( store_t *gctx )
{
(void)gctx;
imap_store_t *ctx = (imap_store_t *)gctx;
if (ctx->num_wait_check)
imap_exec( ctx, NULL, imap_commit_cmds_p2, "CHECK" );
}
static void
imap_commit_cmds_p2( imap_store_t *ctx, imap_cmd_t *cmd ATTR_UNUSED, int response )
{
finalize_checked_imap_cmds( ctx, response );
}
/******************* imap_get_memory_usage *******************/

8
src/drv_proxy.c
View File

@ -288,14 +288,6 @@ proxy_@name@( store_t *gctx@decl_args@, void (*cb)( @decl_cb_args@void *aux ), v
//# END
#endif
//# SPECIAL commit_cmds
static void
proxy_commit_cmds( store_t *gctx )
{
// Currently a dummy in all real drivers.
(void) gctx;
}
//# SPECIAL set_bad_callback
static void
proxy_set_bad_callback( store_t *gctx, void (*cb)( void *aux ), void *aux )