LU-1406 ofd: add FMD support

[fs/lustre-release.git] / lustre / ofd / ofd_internal.h

diff --git a/lustre/ofd/ofd_internal.h b/lustre/ofd/ofd_internal.h
index d701a3c..db2a5b4 100644 (file)
--- a/lustre/ofd/ofd_internal.h
+++ b/lustre/ofd/ofd_internal.h
@@ -49,6 +49,18 @@
                           OBD_INCOMPAT_COMMON_LR)
 #define OFD_MAX_GROUPS 256
 
+/* per-client-per-object persistent state (LRU) */
+struct ofd_mod_data {
+       cfs_list_t      fmd_list;        /* linked to fed_mod_list */
+       struct lu_fid   fmd_fid;         /* FID being written to */
+       __u64           fmd_mactime_xid; /* xid highest {m,a,c}time setattr */
+       cfs_time_t      fmd_expire;      /* time when the fmd should expire */
+       int             fmd_refcount;    /* reference counter - list holds 1 */
+};
+
+#define OFD_FMD_MAX_NUM_DEFAULT 128
+#define OFD_FMD_MAX_AGE_DEFAULT ((obd_timeout + 10) * CFS_HZ)
+
 enum {
        LPROC_OFD_READ_BYTES = 0,
        LPROC_OFD_WRITE_BYTES = 1,
@@ -75,6 +87,10 @@ struct ofd_device {
        struct dt_object        *ofd_lastid_obj[OFD_MAX_GROUPS];
        cfs_spinlock_t           ofd_objid_lock;
 
+       /* ofd mod data: ofd_device wide values */
+       int                      ofd_fmd_max_num; /* per ofd ofd_mod_data */
+       cfs_duration_t           ofd_fmd_max_age; /* time to fmd expiry */
+
        cfs_spinlock_t           ofd_flags_lock;
        unsigned long            ofd_raid_degraded:1,
                                 /* sync journal on writes */
@@ -162,6 +178,22 @@ void lprocfs_ofd_init_vars(struct lprocfs_static_vars *lvars);
 int lproc_ofd_attach_seqstat(struct obd_device *dev);
 extern struct file_operations ofd_per_nid_stats_fops;
 
+/* ofd_fmd.c */
+int ofd_fmd_init(void);
+void ofd_fmd_exit(void);
+struct ofd_mod_data *ofd_fmd_find(struct obd_export *exp,
+                                 struct lu_fid *fid);
+struct ofd_mod_data *ofd_fmd_get(struct obd_export *exp,
+                                struct lu_fid *fid);
+void ofd_fmd_put(struct obd_export *exp, struct ofd_mod_data *fmd);
+void ofd_fmd_expire(struct obd_export *exp);
+void ofd_fmd_cleanup(struct obd_export *exp);
+#ifdef DO_FMD_DROP
+void ofd_fmd_drop(struct obd_export *exp, struct lu_fid *fid);
+#else
+#define ofd_fmd_drop(exp, fid) do {} while (0)
+#endif
+
 static inline struct ofd_thread_info * ofd_info(const struct lu_env *env)
 {
        struct ofd_thread_info *info;