/*
* port_remove
*
* < private >
* Unsafe, need lock fen_lock.
*/
void
port_remove (node_t *f)
{
/* g_assert(f->source); */
if (NODE_HAS_STATE(f, NODE_STATE_ASSOCIATED)) {
/* Mark unregisted. */
if (port_dissociate(PGPFD(f->source)->fd, PORT_SOURCE_FILE, (uintptr_t)FILE_OBJECT(f)) == 0) {
/*
* Note, we can run foode_delete if dissociating is failed,
* because there may be some pending events (mostly like
* FILE_DELETE) in the port_get. If we delete the foode
* the fnode may be deleted, then port_get will run on an invalid
* address.
*/
NODE_CLE_STATE(f, NODE_STATE_ASSOCIATED);
FK_W ("PORT_DISSOCIATE 0x%p OK\n", f);
} else if (errno == ENOENT) {
/* The file has been removed from port, after port_get or before
* port_get but DELETED event has been generated.
* Ignored. */
} else {
FK_W ("PORT_DISSOCIATE 0x%p %s\n", f, g_strerror (errno));
g_return_if_reached();
}
}
}
gint
node_lstat(node_t *f)
{
struct stat buf;
g_assert(!NODE_HAS_STATE(f, NODE_STATE_ASSOCIATED));
if (lstat(NODE_NAME(f), &buf) == 0) {
FN_W ("%s %s\n", __func__, NODE_NAME(f));
FILE_OBJECT(f)->fo_atime = buf.st_atim;
FILE_OBJECT(f)->fo_mtime = buf.st_mtim;
FILE_OBJECT(f)->fo_ctime = buf.st_ctim;
NODE_SET_FLAG(f, NODE_FLAG_STAT_UPDATED |
(S_ISDIR (buf.st_mode) ? NODE_FLAG_DIR : NODE_FLAG_NONE));
return 0;
} else {
FN_W ("%s(lstat) %s %s\n", __func__, NODE_NAME(f), g_strerror (errno));
}
return errno;
}
/*
* port_add:
* @f:
*
* Unsafe, need lock fen_lock.
* port_add will associate a GSource to @f->source
*/
gint
port_add(node_t *f)
{
GSource *source = f->source;
FK_W ("%s [0x%p] %s\n", __func__, f, NODE_NAME(f));
g_assert(f);
g_assert(NODE_HAS_FLAG(f, NODE_FLAG_STAT_UPDATED));
/* if (!NODE_HAS_FLAG(f, NODE_FLAG_STAT_DONE)) { */
/* if (NODE_STAT(f) != 0) { */
/* return errno; */
/* } */
/* } */
/* Try re-use f->pn. f->pn may be used by other request, e.g. f is deleted
* for a long time. So if pn is full, we try to open a new one.
*/
if (!source) {
start_over:
/* Try the next visible source. */
if (pn_visible_list) {
source = (GSource *)pn_visible_list->data;
} else {
if ((source = psource_new()) != NULL) {
g_assert (g_list_find (pn_visible_list, source) == NULL);
pn_visible_list = g_list_prepend (pn_visible_list, source);
}
}
}
if (port_associate(PGPFD(source)->fd, PORT_SOURCE_FILE, (uintptr_t)FILE_OBJECT(f),
CONCERNED_EVENTS,
(void *)f) == 0) {
f->source = source;
NODE_SET_STATE(f, NODE_STATE_ASSOCIATED);
NODE_CLE_FLAG(f, NODE_FLAG_STAT_UPDATED);
FK_W ("PORT_ASSOCIATE 0x%p OK\n", f);
return 0;
} else if (errno == EAGAIN) {
/* Full, remove it. */
pn_visible_list = g_list_remove (pn_visible_list, source);
/* Re-add to port */
goto start_over;
} else if (errno == ENOENT) {
/* File is not exist */
} else if (errno == ENOTSUP) {
/* FS is not supported. Currently we think it no longer make sense to
* monitor it, so clean the stat info and return 0 to ignore this
* node. If there are requirement, we can consider to add polling
* method.
*/
NODE_CLE_FLAG(f, NODE_FLAG_STAT_UPDATED);
return 0;
} else {
FK_W ("PORT_ASSOCIATE 0x%p %s\n", f, g_strerror (errno));
}
/* No matter if associated successfully, stat info is out-of-date, so clean it. */
NODE_CLE_FLAG(f, NODE_FLAG_STAT_UPDATED);
return errno;
}