fd-tracker: restore suspended handles from their inode's path

[lttng-tools.git] / src / common / fd-tracker / inode.h

diff --git a/src/common/fd-tracker/inode.h b/src/common/fd-tracker/inode.h
index 41e947011f2a0c189658ebf8da106c4facde718a..d3c0ed2bf2239ecb889e5cd186c9bd71c01e72d2 100644 (file)
--- a/src/common/fd-tracker/inode.h
+++ b/src/common/fd-tracker/inode.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2020 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License, version 2 only, as
@@ -18,26 +18,52 @@
 #ifndef FD_TRACKER_INODE_H
 #define FD_TRACKER_INODE_H
 
+#include <common/compat/directory-handle.h>
 #include <stdbool.h>
 
 struct lttng_inode;
 struct lttng_inode_registry;
+struct lttng_unlinked_file_directory;
+
+/*
+ * The unlinked file pool is protected by the fd-tracker's lock.
+ *
+ * NOTE: the unlinked file pool can use a single file desriptor when unlinked
+ * files are present in the pool. This file descriptor is not accounted-for
+ * by the fd-tracker. Users of the fd-tracker should account for this extra
+ * file descriptor.
+ */
+struct lttng_unlinked_file_pool *lttng_unlinked_file_pool_create(
+               const char *path);
+
+void lttng_unlinked_file_pool_destroy(
+               struct lttng_unlinked_file_pool *pool);
 
 /* The inode registry is protected by the fd-tracker's lock. */
 struct lttng_inode_registry *lttng_inode_registry_create(void);
 
 struct lttng_inode *lttng_inode_registry_get_inode(
                struct lttng_inode_registry *registry,
+               struct lttng_directory_handle *handle,
+               const char *path,
                int fd,
-               const char *path);
+               struct lttng_unlinked_file_pool *pool);
 
 void lttng_inode_registry_destroy(struct lttng_inode_registry *registry);
 
-const char *lttng_inode_get_path(const struct lttng_inode *inode);
+void lttng_inode_get_location(struct lttng_inode *inode,
+               const struct lttng_directory_handle **out_directory_handle,
+               const char **out_path);
+
 int lttng_inode_rename(struct lttng_inode *inode,
+               struct lttng_directory_handle *old_directory_handle,
+               const char *old_path,
+               struct lttng_directory_handle *new_directory_handle,
                const char *new_path,
                bool overwrite);
-int lttng_inode_defer_unlink(struct lttng_inode *inode);
+
+int lttng_inode_unlink(struct lttng_inode *inode);
+
 void lttng_inode_put(struct lttng_inode *inode);
 
 #endif /* FD_TRACKER_INODE_H */