LU-12137 osd-ldiskfs: create locked and unlocked versions of osd lookup code

[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_oi.h

diff --git a/lustre/osd-ldiskfs/osd_oi.h b/lustre/osd-ldiskfs/osd_oi.h
index ce68721..7e0c377 100644 (file)
--- a/lustre/osd-ldiskfs/osd_oi.h
+++ b/lustre/osd-ldiskfs/osd_oi.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.
@@ -17,11 +15,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
  *
  * GPL HEADER END
  */
@@ -29,7 +23,7 @@
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2012, Whamcloud, Inc.
+ * Copyright (c) 2012, 2016, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -51,18 +45,21 @@
 #ifndef _OSD_OI_H
 #define _OSD_OI_H
 
-#if defined(__KERNEL__)
 
 /* struct rw_semaphore */
 #include <linux/rwsem.h>
+#include <linux/jbd2.h>
 #include <lustre_fid.h>
 #include <lu_object.h>
 #include <md_object.h>
 
+#define OSD_OI_FID_OID_BITS    6
+#define OSD_OI_FID_NR          (1UL << OSD_OI_FID_OID_BITS)
+#define OSD_OII_NOGEN          (0)
+
 struct lu_fid;
 struct osd_thread_info;
 struct lu_site;
-struct thandle;
 
 struct dt_device;
 struct osd_device;
@@ -72,25 +69,90 @@ struct osd_oi;
  * Storage cookie. Datum uniquely identifying inode on the underlying file
  * system.
  *
- * XXX Currently this is ext2/ext3/ldiskfs specific thing. In the future this
- * should be generalized to work with other local file systems.
+ * osd_inode_id is the internal ldiskfs identifier for an object. It should
+ * not be visible outside of the osd-ldiskfs. Other OSDs may have different
+ * identifiers, so this cannot form any part of the OSD API.
  */
 struct osd_inode_id {
-        __u32 oii_ino; /* inode number */
-        __u32 oii_gen; /* inode generation */
+       __u32 oii_ino; /* inode number */
+       __u32 oii_gen; /* inode generation */
 };
 
+/* OI cache entry */
+struct osd_idmap_cache {
+       struct lu_fid           oic_fid;
+       struct osd_inode_id     oic_lid;
+       struct osd_device       *oic_dev;
+       __u16                   oic_remote:1;   /* FID isn't local */
+};
+
+static inline void osd_id_pack(struct osd_inode_id *tgt,
+                              const struct osd_inode_id *src)
+{
+       tgt->oii_ino = cpu_to_be32(src->oii_ino);
+       tgt->oii_gen = cpu_to_be32(src->oii_gen);
+}
+
+static inline void osd_id_unpack(struct osd_inode_id *tgt,
+                                struct osd_inode_id *src)
+{
+       tgt->oii_ino = be32_to_cpu(src->oii_ino);
+       tgt->oii_gen = be32_to_cpu(src->oii_gen);
+}
+
+static inline void osd_id_gen(struct osd_inode_id *id, __u32 ino, __u32 gen)
+{
+       id->oii_ino = ino;
+       id->oii_gen = gen;
+}
+
+static inline void osd_id_to_inode(struct inode *inode,
+                                  const struct osd_inode_id *id)
+{
+       inode->i_ino        = id->oii_ino;
+       inode->i_generation = id->oii_gen;
+}
+
+static inline int osd_id_eq(const struct osd_inode_id *id0,
+                           const struct osd_inode_id *id1)
+{
+       return (id0->oii_ino == id1->oii_ino) &&
+              (id0->oii_gen == id1->oii_gen ||
+               id0->oii_gen == OSD_OII_NOGEN ||
+               id1->oii_gen == OSD_OII_NOGEN);
+}
+
+static inline int osd_id_eq_strict(const struct osd_inode_id *id0,
+                                  const struct osd_inode_id *id1)
+{
+       return (id0->oii_ino == id1->oii_ino && id0->oii_gen == id1->oii_gen);
+}
+
+enum oi_check_flags {
+       OI_CHECK_FLD    = 0x00000001,
+       OI_KNOWN_ON_OST = 0x00000002,
+       OI_LOCKED       = 0x00000004,
+};
+
+extern unsigned int osd_oi_count;
+
 int osd_oi_mod_init(void);
-int osd_oi_init(struct osd_thread_info *info, struct osd_device *osd);
+int osd_oi_init(struct osd_thread_info *info, struct osd_device *osd,
+               bool restored);
 void osd_oi_fini(struct osd_thread_info *info, struct osd_device *osd);
 int  osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
-                   const struct lu_fid *fid, struct osd_inode_id *id);
+                  const struct lu_fid *fid, struct osd_inode_id *id,
+                  enum oi_check_flags flags);
 int  osd_oi_insert(struct osd_thread_info *info, struct osd_device *osd,
-                   const struct lu_fid *fid, const struct osd_inode_id *id,
-                   struct thandle *th, int ingore_quota);
+                  const struct lu_fid *fid, const struct osd_inode_id *id,
+                  handle_t *th, enum oi_check_flags flags, bool *exist);
 int  osd_oi_delete(struct osd_thread_info *info,
-                   struct osd_device *osd, const struct lu_fid *fid,
-                   struct thandle *th);
+                  struct osd_device *osd, const struct lu_fid *fid,
+                  handle_t *th, enum oi_check_flags flags);
+int  osd_oi_update(struct osd_thread_info *info, struct osd_device *osd,
+                  const struct lu_fid *fid, const struct osd_inode_id *id,
+                  handle_t *th, enum oi_check_flags flags);
 
-#endif /* __KERNEL__ */
+int fid_is_on_ost(struct osd_thread_info *info, struct osd_device *osd,
+                 const struct lu_fid *fid, enum oi_check_flags flags);
 #endif /* _OSD_OI_H */