LU-921 llite: warning in case of discarding dirty pages

[fs/lustre-release.git] / lustre / include / lclient.h

diff --git a/lustre/include/lclient.h b/lustre/include/lclient.h
index be16d0f..a1bc9aa 100644 (file)
--- a/lustre/include/lclient.h
+++ b/lustre/include/lclient.h
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -109,6 +107,10 @@ struct ccc_io {
          * True iff io is processing glimpse right now.
          */
         int                  cui_glimpse;
+       /**
+        * Layout version when this IO is initialized
+        */
+       __u32                cui_layout_gen;
         /**
          * File descriptor against which IO is done.
          */
@@ -202,6 +204,18 @@ struct ccc_object {
          * \see ll_vm_open(), ll_vm_close().
          */
         cfs_atomic_t            cob_mmap_cnt;
+
+       /**
+        * various flags
+        * cob_discard_page_warned
+        *     if pages belonging to this object are discarded when a client
+        * is evicted, some debug info will be printed, this flag will be set
+        * during processing the first discarded page, then avoid flooding
+        * debug message for lots of discarded pages.
+        *
+        * \see ll_dirty_page_discard_warn.
+        */
+       int                     cob_discard_page_warned:1;
 };
 
 /**
@@ -406,4 +420,30 @@ int  cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
                       struct ccc_grouplock *cg);
 void cl_put_grouplock(struct ccc_grouplock *cg);
 
+/**
+ * New interfaces to get and put lov_stripe_md from lov layer. This violates
+ * layering because lov_stripe_md is supposed to be a private data in lov.
+ *
+ * NB: If you find you have to use these interfaces for your new code, please
+ * think about it again. These interfaces may be removed in the future for
+ * better layering. */
+struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj);
+void lov_lsm_put(struct cl_object *clobj, struct lov_stripe_md *lsm);
+int lov_read_and_clear_async_rc(struct cl_object *clob);
+
+struct lov_stripe_md *ccc_inode_lsm_get(struct inode *inode);
+void ccc_inode_lsm_put(struct inode *inode, struct lov_stripe_md *lsm);
+
+/**
+ * Data structures for LRU management on lustre client mount
+ */
+struct cl_client_lru {
+       cfs_atomic_t    ccl_users; /* how many users(OSCs) of this data */
+       cfs_atomic_t    ccl_page_left;
+       unsigned long   ccl_page_max;
+       cfs_list_t      ccl_list; /* entities for lru - actually osc list */
+       cfs_spinlock_t  ccl_lock; /* lock for list */
+       unsigned int    ccl_reclaim_count; /* statistics */
+};
+
 #endif /*LCLIENT_H */