/*
* Adjust self on failing to Port
*/
void
node_adjust_deleted(node_t* f)
{
node_t *ancestor;
FN_W ("%s %s\n", __func__, NODE_NAME(f));
for (ancestor = NODE_PARENT(f);
ancestor != NULL;
ancestor = NODE_PARENT(ancestor)) {
/* Stop if we find a node which been already associated or is existed
* and can be associated.
*/
if (NODE_HAS_STATE(ancestor, NODE_STATE_ASSOCIATED) ||
(node_lstat(ancestor) == 0 && port_add(ancestor) == 0)) {
break;
}
}
/* We assume we shouldn't reach here, because Root is always existed and
* associated. But given bugster#6955199, if PORT FS has problems on root,
* we may reach here. So just return ROOT and the whole GIO fen backend will
* fail.
*/
/* g_assert(ancestor != NULL); */
}
static gboolean
port_dispatch(GSource *source, GSourceFunc callback, gpointer user_data)
{
node_t *f;
uint_t nget = 0;
uint_t total = 0;
FK_W ("%s 0x%p fd %d\n", __func__, source, PGPFD(source)->fd);
G_LOCK (fen_lock);
do {
nget = 1;
if (port_getn(PGPFD(source)->fd, pevents, PE_ALLOC, &nget, &zero_wait) == 0) {
int i;
for (i = 0; i < nget; i++) {
f = (node_t *)pevents[i].portev_user;
if (pevents[i].portev_source == PORT_SOURCE_FILE) {
NODE_CLE_STATE(f, NODE_STATE_ASSOCIATED);
NODE_SET_STATE(f, NODE_STATE_HAS_EVENTS);
if (HAS_NO_EXCEPTION_EVENTS(pevents[i].portev_events)) {
/* If the events do not show it's deleted, update
* file timestamp to avoid missing events next time.
*/
if (node_lstat(f) != 0 /* || port_add(f) != 0 */) {
/* Included deleted event. */
pevents[i].portev_events |= FILE_DELETE;
}
}
/* Queue it and waiting for processing. */
g_queue_push_tail(g_eventq,
node_event_new(pevents[i].portev_events, (gpointer)f));
} else {
FK_W ("[kernel] unknown portev_source %d\n", pevents[i].portev_source);
}
}
total += nget;
} else {
FK_W ("[kernel] port_getn %s\n", g_strerror (errno));
break;
}
} while (nget == PE_ALLOC);
G_UNLOCK (fen_lock);
if (total > 0 && callback) {
FK_W ("[kernel] get total %ld events\n", total);
return callback (user_data);
}
return TRUE;
}
void
node_create_children_snapshot(node_t *f, gint created_event, gboolean emit)
{
GDir *dir;
GError *err = NULL;
FN_W ("%s %s [0x%p]\n", __func__, NODE_NAME(f), f);
dir = g_dir_open (NODE_NAME(f), 0, &err);
if (dir) {
const char *basename;
node_t *child = NULL;
while ((basename = g_dir_read_name (dir))) {
node_t* data;
GList *idx;
child = node_get_child (f, basename);
if (child == NULL) {
gchar *filename;
child = node_new (f, basename);
children_add (f, child);
}
if (f->dir_subs) {
/* We need monitor the new children, or the existed child which
* is in the DELETED mode.
*/
if (!NODE_HAS_STATE(child, NODE_STATE_ASSOCIATED) &&
node_lstat(child) == 0 && port_add(child) == 0) {
if (emit) {
/* Emit the whatever event for the new found file. */
node_emit_one_event(child, child->dir_subs, NULL, created_event);
node_emit_one_event(child, child->subs, NULL, created_event);
node_emit_one_event(child, f->dir_subs, NULL, created_event);
node_emit_one_event(child, f->subs, NULL, created_event);
}
}
/* else ignore, because it may be deleted. */
}
}
g_dir_close (dir);
/* We have finished children snapshot. Any other new added subs should
* directory iterate the snapshot instead of scan directory again.
*/
NODE_SET_FLAG(f, NODE_FLAG_SNAPSHOT_UPDATED);
} else {
FN_W (err->message);
g_error_free (err);
}
}
/**
* fen_add
*
* Won't hold a ref, we have a timout callback to clean unused node_t.
* If there is no value for a key, add it and return it; else return the old
* one.
*/
void
fen_add (const gchar *filename, gpointer sub, gboolean is_mondir)
{
node_t* f;
g_assert (filename);
g_assert (sub);
G_LOCK (fen_lock);
f = node_find(NULL, filename, TRUE);
FH_W ("%s 0x%p sub[0x%p] %s\n", __func__, f, sub, filename);
g_assert (f);
/* Update timestamp, the events in global queue will compare itself to this
* timestamp to decide if be emitted. TODO, timestamp should be per sub.
*/
if (!NODE_IS_ACTIVE(f)) {
g_get_current_time(&f->atv);
}
if (is_mondir) {
f->dir_subs = g_list_prepend(f->dir_subs, sub);
} else {
f->subs = g_list_prepend(f->subs, sub);
}
if (NODE_HAS_STATE(f, NODE_STATE_ASSOCIATED) ||
(node_lstat(f) == 0 && port_add(f) == 0)) {
#ifndef GIO_COMPILATION
gam_server_emit_one_event (NODE_NAME(f),
gam_subscription_is_dir (sub), GAMIN_EVENT_EXISTS, sub, 1);
#endif
if (is_mondir) {
scan_children_init (f, sub);
}
} else {
#ifndef GIO_COMPILATION
gam_server_emit_one_event (NODE_NAME(f),
gam_subscription_is_dir (sub), GAMIN_EVENT_DELETED, sub, 1);
#endif
node_adjust_deleted (f);
}
#ifndef GIO_COMPILATION
gam_server_emit_one_event (NODE_NAME(f),
gam_subscription_is_dir (sub), GAMIN_EVENT_ENDEXISTS, sub, 1);
#endif
G_UNLOCK (fen_lock);
}
/*
* If all active children nodes are ported, then cancel monitor the parent
* node. If we know how many children are created, then we can stop accordingly.
*
* Unsafe, need lock.
*/
static void
foreach_known_children_scan(gpointer key, gpointer value, gpointer user_data)
{
node_t* f = (node_t*)value;
FN_W ("%s 0x%p %s\n", __func__, f, NODE_NAME(f));
if (!NODE_HAS_STATE(f, NODE_STATE_ASSOCIATED)) {
if (node_lstat(f) == 0 && port_add(f) == 0) {
node_emit_one_event(f, f->dir_subs, NULL, FN_EVENT_CREATED);
node_emit_one_event(f, f->subs, NULL, FN_EVENT_CREATED);
if (NODE_PARENT(f)) {
node_emit_one_event(f, NODE_PARENT(f)->dir_subs, NULL, FN_EVENT_CREATED);
node_emit_one_event(f, NODE_PARENT(f)->subs, NULL, FN_EVENT_CREATED);
}
}
}
}
