LU-5370 mdt: return -MDT_EREMOTE_OPEN for remote open

[fs/lustre-release.git] / lustre / mdt / mdt_internal.h

diff --git a/lustre/mdt/mdt_internal.h b/lustre/mdt/mdt_internal.h
index 116d98f..75127e3 100644 (file)
--- a/lustre/mdt/mdt_internal.h
+++ b/lustre/mdt/mdt_internal.h
@@ -307,6 +307,13 @@ enum {
         MDT_CROSS_LOCK
 };
 
+/* Special magical errno for communicaiton between mdt_reint_open()
+ * and mdt_intent_reint() which means return the lock to the client
+ * for subsequent cross ref open. Previously we used plain -EREMOTE
+ * but other functions called in that path might return it too and
+ * confuse us. This is not returned to the client. See LU-5370. */
+#define MDT_EREMOTE_OPEN (EREMOTE + 1024)
+
 struct mdt_reint_record {
        mdt_reint_t                      rr_opcode;
        const struct lustre_handle      *rr_handle;
@@ -589,11 +596,16 @@ static inline void mdt_export_evict(struct obd_export *exp)
 
 /* Here we use LVB_TYPE to check dne client, because it is
  * also landed on 2.4. */
-static inline int mdt_is_dne_client(struct obd_export *exp)
+static inline bool mdt_is_dne_client(struct obd_export *exp)
 {
        return !!(exp_connect_flags(exp) & OBD_CONNECT_LVB_TYPE);
 }
 
+static inline bool mdt_is_striped_client(struct obd_export *exp)
+{
+       return exp_connect_flags(exp) & OBD_CONNECT_DIR_STRIPE;
+}
+
 int mdt_get_disposition(struct ldlm_reply *rep, int flag);
 void mdt_set_disposition(struct mdt_thread_info *info,
                         struct ldlm_reply *rep, int flag);
@@ -611,6 +623,10 @@ int mdt_lock_setup(struct mdt_thread_info *info,
                    struct mdt_object *o,
                    struct mdt_lock_handle *lh);
 
+int mdt_check_resent_lock(struct mdt_thread_info *info,
+                         struct mdt_object *mo,
+                         struct mdt_lock_handle *lhc);
+
 int mdt_object_lock(struct mdt_thread_info *,
                     struct mdt_object *,
                     struct mdt_lock_handle *,
@@ -756,9 +772,6 @@ void mdt_thread_info_init(struct ptlrpc_request *req,
 void mdt_thread_info_fini(struct mdt_thread_info *mti);
 struct mdt_thread_info *tsi2mdt_info(struct tgt_session_info *tsi);
 
-extern struct lprocfs_vars lprocfs_mds_module_vars[];
-extern struct lprocfs_vars lprocfs_mds_obd_vars[];
-
 int mdt_hsm_attr_set(struct mdt_thread_info *info, struct mdt_object *obj,
                     const struct md_hsm *mh);
 
@@ -896,13 +909,12 @@ int mdt_hsm_cdt_fini(struct mdt_device *mdt);
 int mdt_hsm_cdt_wakeup(struct mdt_device *mdt);
 
 /* coordinator control /proc interface */
-int lprocfs_wr_hsm_cdt_control(struct file *file, const char *buffer,
-                              unsigned long count, void *data);
-int lprocfs_rd_hsm_cdt_control(char *page, char **start, off_t off,
-                              int count, int *eof, void *data);
+ssize_t mdt_hsm_cdt_control_seq_write(struct file *file, const char *buffer,
+                                       size_t count, loff_t *off);
+int mdt_hsm_cdt_control_seq_show(struct seq_file *m, void *data);
 int hsm_cdt_procfs_init(struct mdt_device *mdt);
 void hsm_cdt_procfs_fini(struct mdt_device *mdt);
-struct lprocfs_vars *hsm_cdt_get_proc_vars(void);
+struct lprocfs_seq_vars *hsm_cdt_get_proc_vars(void);
 /* md_hsm helpers */
 struct mdt_object *mdt_hsm_get_md_hsm(struct mdt_thread_info *mti,
                                      const struct lu_fid *fid,
@@ -1042,8 +1054,6 @@ enum {
 };
 void mdt_counter_incr(struct ptlrpc_request *req, int opcode);
 void mdt_stats_counter_init(struct lprocfs_stats *stats);
-void lprocfs_mdt_init_vars(struct lprocfs_static_vars *lvars);
-void lprocfs_mds_init_vars(struct lprocfs_static_vars *lvars);
 int mdt_procfs_init(struct mdt_device *mdt, const char *name);
 void mdt_procfs_fini(struct mdt_device *mdt);