#include "bluesky-private.h"
#define WRITEBACK_DELAY (5 * 1000000)
+#define CACHE_CLEAN_DELAY (30 * 1000000)
/* Filesystem caching and cache coherency. */
g_mutex_lock(inode->lock);
inode->change_commit = inode->change_pending;
+ inode->change_pending = 0;
if (inode->change_count == inode->change_commit) {
/* If inode is no longer dirty... */
inode->change_time = 0;
- inode->change_pending = 0;
+ g_mutex_lock(inode->fs->lock);
+ bluesky_list_unlink(&inode->fs->dirty_list, inode->dirty_list);
+ inode->dirty_list = NULL;
+ g_mutex_unlock(inode->fs->lock);
}
g_mutex_unlock(inode->lock);
}
+/* Drop cached data for a given inode, if it is clean. inode must be locked. */
+static void drop_caches(BlueSkyInode *inode)
+{
+ if (inode->type == BLUESKY_REGULAR)
+ bluesky_file_drop_cached(inode);
+}
+
static void flushd_inode(gpointer value, gpointer user_data)
{
BlueSkyFS *fs = (BlueSkyFS *)user_data;
g_mutex_lock(inode->lock);
if (inode->change_count == inode->change_commit) {
+ uint64_t delay = bluesky_get_current_time() - inode->access_time;
+ if (delay >= CACHE_CLEAN_DELAY) {
+ drop_caches(inode);
+
+ /* If the only references are the one we hold and the one in the
+ * filesystem inum->inode hash table... First check the refcount
+ * without the lock for speed, but if the check looks good verify
+ * it after taking the filesystem lock. */
+ if (inode->refcount == 2) {
+ g_mutex_lock(fs->lock);
+ if (inode->refcount == 2) {
+ g_log("bluesky/flushd", G_LOG_LEVEL_DEBUG,
+ "Trying to drop inode %"PRIu64" from cache",
+ inode->inum);
+ if (g_hash_table_remove(fs->inodes, &inode->inum))
+ bluesky_inode_unref(inode);
+ }
+ bluesky_list_unlink(&inode->fs->accessed_list,
+ inode->accessed_list);
+ inode->accessed_list = NULL;
+ bluesky_list_unlink(&inode->fs->dirty_list,
+ inode->dirty_list);
+ inode->dirty_list = NULL;
+ g_mutex_unlock(fs->lock);
+ }
+ }
+
g_mutex_unlock(inode->lock);
bluesky_inode_unref(inode);
return;