LU-12681 osc: wrong cache of LVB attrs

[fs/lustre-release.git] / lustre / osc / osc_internal.h

diff --git a/lustre/osc/osc_internal.h b/lustre/osc/osc_internal.h
index e9df607..529e628 100644 (file)
--- a/lustre/osc/osc_internal.h
+++ b/lustre/osc/osc_internal.h
@@ -44,6 +44,7 @@ extern struct ptlrpc_request_pool *osc_rq_pool;
 
 void osc_wake_cache_waiters(struct client_obd *cli);
 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes);
+void osc_schedule_grant_work(void);
 void osc_update_next_shrink(struct client_obd *cli);
 int lru_queue_work(const struct lu_env *env, void *data);
 int osc_extent_finish(const struct lu_env *env, struct osc_extent *ext,
@@ -56,8 +57,7 @@ extern struct ptlrpc_request_set *PTLRPCD_SET;
 
 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
                     __u64 *flags, union ldlm_policy_data *policy,
-                    struct ost_lvb *lvb, int kms_valid,
-                    osc_enqueue_upcall_f upcall,
+                    struct ost_lvb *lvb, osc_enqueue_upcall_f upcall,
                     void *cookie, struct ldlm_enqueue_info *einfo,
                     struct ptlrpc_request_set *rqset, int async,
                     bool speculative);
@@ -90,12 +90,7 @@ unsigned long osc_ldlm_weigh_ast(struct ldlm_lock *dlmlock);
 int osc_cleanup(struct obd_device *obd);
 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
 
-#ifdef CONFIG_PROC_FS
-extern struct lprocfs_vars lprocfs_osc_obd_vars[];
-int lproc_osc_attach_seqstat(struct obd_device *dev);
-#else
-static inline int lproc_osc_attach_seqstat(struct obd_device *dev) {return 0;}
-#endif
+int osc_tunables_init(struct obd_device *obd);
 
 extern struct lu_device_type osc_device_type;
 
@@ -152,7 +147,7 @@ struct osc_async_args {
 
 int osc_quota_setup(struct obd_device *obd);
 int osc_quota_cleanup(struct obd_device *obd);
-int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
+int osc_quota_setdq(struct client_obd *cli, __u64 xid, const unsigned int qid[],
                    u64 valid, u32 flags);
 int osc_quota_chkdq(struct client_obd *cli, const unsigned int qid[]);
 int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
@@ -160,6 +155,8 @@ int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
 void osc_inc_unstable_pages(struct ptlrpc_request *req);
 void osc_dec_unstable_pages(struct ptlrpc_request *req);
 bool osc_over_unstable_soft_limit(struct client_obd *cli);
+void osc_page_touch_at(const struct lu_env *env, struct cl_object *obj,
+                      pgoff_t idx, size_t to);
 
 struct ldlm_lock *osc_obj_dlmlock_at_pgoff(const struct lu_env *env,
                                           struct osc_object *obj,
@@ -176,6 +173,35 @@ extern unsigned long osc_cache_shrink_count(struct shrinker *sk,
                                            struct shrink_control *sc);
 extern unsigned long osc_cache_shrink_scan(struct shrinker *sk,
                                           struct shrink_control *sc);
+static inline unsigned int osc_max_write_chunks(const struct client_obd *cli)
+{
+       /*
+        * LU-8135:
+        *
+        * The maximum size of a single transaction is about 64MB in ZFS.
+        * #define DMU_MAX_ACCESS (64 * 1024 * 1024)
+        *
+        * Since ZFS is a copy-on-write file system, a single dirty page in
+        * a chunk will result in the rewrite of the whole chunk, therefore
+        * an RPC shouldn't be allowed to contain too many chunks otherwise
+        * it will make transaction size much bigger than 64MB, especially
+        * with big block size for ZFS.
+        *
+        * This piece of code is to make sure that OSC won't send write RPCs
+        * with too many chunks. The maximum chunk size that an RPC can cover
+        * is set to PTLRPC_MAX_BRW_SIZE, which is defined to 16MB. Ideally
+        * OST should tell the client what the biggest transaction size is,
+        * but it's good enough for now.
+        *
+        * This limitation doesn't apply to ldiskfs, which allows as many
+        * chunks in one RPC as we want. However, it won't have any benefits
+        * to have too many discontiguous pages in one RPC.
+        *
+        * An osc_extent won't cover over a RPC size, so the chunks in an
+        * osc_extent won't bigger than PTLRPC_MAX_BRW_SIZE >> chunkbits.
+        */
+       return PTLRPC_MAX_BRW_SIZE >> cli->cl_chunkbits;
+}
 
 static inline void osc_set_io_portal(struct ptlrpc_request *req)
 {