X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fosc%2Fosc_object.c;h=6b44d630724bea0067a14a1e091f57aa3e1cd327;hb=0333fc904b658c35df739b59495297d3386a9e67;hp=e1e4fdb9048d1b1823202690c275366a1c115957;hpb=3f3a24dc5d7d421e1514dc49cc7c2eb5cb762b26;p=fs%2Flustre-release.git

diff --git a/lustre/osc/osc_object.c b/lustre/osc/osc_object.c
index e1e4fdb..6b44d63 100644
--- a/lustre/osc/osc_object.c
+++ b/lustre/osc/osc_object.c
@@ -15,11 +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
  */
@@ -27,7 +23,7 @@
  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2013, Intel Corporation.
+ * Copyright (c) 2011, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -40,51 +36,40 @@
  */
 
 #define DEBUG_SUBSYSTEM S_OSC
+#include <lustre_osc.h>
 
-#include "osc_cl_internal.h"
+#include "osc_internal.h"
 
-/** \addtogroup osc 
- *  @{ 
+/** \addtogroup osc
+ *  @{
  */
 
 /*****************************************************************************
  *
- * Type conversions.
+ * Object operations.
  *
  */
-
-static struct lu_object *osc2lu(struct osc_object *osc)
-{
-        return &osc->oo_cl.co_lu;
-}
-
-static struct osc_object *lu2osc(const struct lu_object *obj)
+static void osc_obj_build_res_name(struct osc_object *osc,
+				   struct ldlm_res_id *resname)
 {
-        LINVRNT(osc_is_object(obj));
-        return container_of0(obj, struct osc_object, oo_cl.co_lu);
+	ostid_build_res_name(&osc->oo_oinfo->loi_oi, resname);
 }
 
-/*****************************************************************************
- *
- * Object operations.
- *
- */
+static const struct osc_object_operations osc_object_ops = {
+	.oto_build_res_name = osc_obj_build_res_name,
+	.oto_dlmlock_at_pgoff = osc_obj_dlmlock_at_pgoff,
+};
 
-static int osc_object_init(const struct lu_env *env, struct lu_object *obj,
-                           const struct lu_object_conf *conf)
+int osc_object_init(const struct lu_env *env, struct lu_object *obj,
+		    const struct lu_object_conf *conf)
 {
         struct osc_object           *osc   = lu2osc(obj);
         const struct cl_object_conf *cconf = lu2cl_conf(conf);
-        int i;
 
-        osc->oo_oinfo = cconf->u.coc_oinfo;
+	osc->oo_oinfo = cconf->u.coc_oinfo;
 #ifdef CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK
 	mutex_init(&osc->oo_debug_mutex);
 #endif
-	spin_lock_init(&osc->oo_seatbelt);
-        for (i = 0; i < CRT_NR; ++i)
-		INIT_LIST_HEAD(&osc->oo_inflight[i]);
-
 	INIT_LIST_HEAD(&osc->oo_ready_item);
 	INIT_LIST_HEAD(&osc->oo_hp_ready_item);
 	INIT_LIST_HEAD(&osc->oo_write_item);
@@ -93,7 +78,7 @@ static int osc_object_init(const struct lu_env *env, struct lu_object *obj,
 	osc->oo_root.rb_node = NULL;
 	INIT_LIST_HEAD(&osc->oo_hp_exts);
 	INIT_LIST_HEAD(&osc->oo_urgent_exts);
-	INIT_LIST_HEAD(&osc->oo_rpc_exts);
+	INIT_LIST_HEAD(&osc->oo_full_exts);
 	INIT_LIST_HEAD(&osc->oo_reading_exts);
 	atomic_set(&osc->oo_nr_reads, 0);
 	atomic_set(&osc->oo_nr_writes, 0);
@@ -102,18 +87,20 @@ static int osc_object_init(const struct lu_env *env, struct lu_object *obj,
 	spin_lock_init(&osc->oo_ol_spin);
 	INIT_LIST_HEAD(&osc->oo_ol_list);
 
+	atomic_set(&osc->oo_nr_ios, 0);
+	init_waitqueue_head(&osc->oo_io_waitq);
+
+	LASSERT(osc->oo_obj_ops != NULL);
+
 	cl_object_page_init(lu2cl(obj), sizeof(struct osc_page));
 
 	return 0;
 }
+EXPORT_SYMBOL(osc_object_init);
 
-static void osc_object_free(const struct lu_env *env, struct lu_object *obj)
+void osc_object_free(const struct lu_env *env, struct lu_object *obj)
 {
 	struct osc_object *osc = lu2osc(obj);
-	int i;
-
-	for (i = 0; i < CRT_NR; ++i)
-		LASSERT(list_empty(&osc->oo_inflight[i]));
 
 	LASSERT(list_empty(&osc->oo_ready_item));
 	LASSERT(list_empty(&osc->oo_hp_ready_item));
@@ -123,133 +110,207 @@ static void osc_object_free(const struct lu_env *env, struct lu_object *obj)
 	LASSERT(osc->oo_root.rb_node == NULL);
 	LASSERT(list_empty(&osc->oo_hp_exts));
 	LASSERT(list_empty(&osc->oo_urgent_exts));
-	LASSERT(list_empty(&osc->oo_rpc_exts));
+	LASSERT(list_empty(&osc->oo_full_exts));
 	LASSERT(list_empty(&osc->oo_reading_exts));
 	LASSERT(atomic_read(&osc->oo_nr_reads) == 0);
 	LASSERT(atomic_read(&osc->oo_nr_writes) == 0);
 	LASSERT(list_empty(&osc->oo_ol_list));
+	LASSERT(atomic_read(&osc->oo_nr_ios) == 0);
 
 	lu_object_fini(obj);
 	OBD_SLAB_FREE_PTR(osc, osc_object_kmem);
 }
+EXPORT_SYMBOL(osc_object_free);
 
 int osc_lvb_print(const struct lu_env *env, void *cookie,
-                  lu_printer_t p, const struct ost_lvb *lvb)
+		  lu_printer_t p, const struct ost_lvb *lvb)
 {
-        return (*p)(env, cookie, "size: "LPU64" mtime: "LPU64" atime: "LPU64" "
-                    "ctime: "LPU64" blocks: "LPU64,
+	return (*p)(env, cookie, "size: %llu mtime: %llu atime: %llu "
+		    "ctime: %llu blocks: %llu",
                     lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
                     lvb->lvb_ctime, lvb->lvb_blocks);
 }
+EXPORT_SYMBOL(osc_lvb_print);
 
-static int osc_object_print(const struct lu_env *env, void *cookie,
-                            lu_printer_t p, const struct lu_object *obj)
+int osc_object_print(const struct lu_env *env, void *cookie,
+		     lu_printer_t p, const struct lu_object *obj)
 {
-	struct osc_object   *osc   = lu2osc(obj);
-	struct lov_oinfo    *oinfo = osc->oo_oinfo;
-	struct osc_async_rc *ar    = &oinfo->loi_ar;
+	struct osc_object *osc = lu2osc(obj);
+	struct lov_oinfo *oinfo = osc->oo_oinfo;
+	struct osc_async_rc *ar = &oinfo->loi_ar;
 
 	(*p)(env, cookie, "id: "DOSTID" "
-	     "idx: %d gen: %d kms_valid: %u kms "LPU64" "
-	     "rc: %d force_sync: %d min_xid: "LPU64" ",
+	     "idx: %d gen: %d kms_valid: %u kms %llu "
+	     "rc: %d force_sync: %d min_xid: %llu ",
 	     POSTID(&oinfo->loi_oi), oinfo->loi_ost_idx,
 	     oinfo->loi_ost_gen, oinfo->loi_kms_valid, oinfo->loi_kms,
 	     ar->ar_rc, ar->ar_force_sync, ar->ar_min_xid);
 	osc_lvb_print(env, cookie, p, &oinfo->loi_lvb);
 	return 0;
 }
+EXPORT_SYMBOL(osc_object_print);
 
 
-static int osc_attr_get(const struct lu_env *env, struct cl_object *obj,
-                        struct cl_attr *attr)
+int osc_attr_get(const struct lu_env *env, struct cl_object *obj,
+		 struct cl_attr *attr)
 {
-        struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
+	struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
 
-        cl_lvb2attr(attr, &oinfo->loi_lvb);
-        attr->cat_kms = oinfo->loi_kms_valid ? oinfo->loi_kms : 0;
-        return 0;
+	cl_lvb2attr(attr, &oinfo->loi_lvb);
+	attr->cat_kms = oinfo->loi_kms_valid ? oinfo->loi_kms : 0;
+	return 0;
 }
+EXPORT_SYMBOL(osc_attr_get);
 
-int osc_attr_set(const struct lu_env *env, struct cl_object *obj,
-                 const struct cl_attr *attr, unsigned valid)
+int osc_attr_update(const struct lu_env *env, struct cl_object *obj,
+		    const struct cl_attr *attr, unsigned valid)
 {
-        struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
-        struct ost_lvb   *lvb   = &oinfo->loi_lvb;
-
-        if (valid & CAT_SIZE)
-                lvb->lvb_size = attr->cat_size;
-        if (valid & CAT_MTIME)
-                lvb->lvb_mtime = attr->cat_mtime;
-        if (valid & CAT_ATIME)
-                lvb->lvb_atime = attr->cat_atime;
-        if (valid & CAT_CTIME)
-                lvb->lvb_ctime = attr->cat_ctime;
-        if (valid & CAT_BLOCKS)
-                lvb->lvb_blocks = attr->cat_blocks;
-        if (valid & CAT_KMS) {
-                CDEBUG(D_CACHE, "set kms from "LPU64"to "LPU64"\n",
-                       oinfo->loi_kms, (__u64)attr->cat_kms);
-                loi_kms_set(oinfo, attr->cat_kms);
-        }
-        return 0;
+	struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
+	struct ost_lvb   *lvb   = &oinfo->loi_lvb;
+
+	if (valid & CAT_SIZE)
+		lvb->lvb_size = attr->cat_size;
+	if (valid & CAT_MTIME)
+		lvb->lvb_mtime = attr->cat_mtime;
+	if (valid & CAT_ATIME)
+		lvb->lvb_atime = attr->cat_atime;
+	if (valid & CAT_CTIME)
+		lvb->lvb_ctime = attr->cat_ctime;
+	if (valid & CAT_BLOCKS)
+		lvb->lvb_blocks = attr->cat_blocks;
+	if (valid & CAT_KMS) {
+		CDEBUG(D_CACHE, "set kms from %lluto %llu\n",
+		       oinfo->loi_kms, (__u64)attr->cat_kms);
+		loi_kms_set(oinfo, attr->cat_kms);
+	}
+	return 0;
 }
+EXPORT_SYMBOL(osc_attr_update);
 
-static int osc_object_glimpse(const struct lu_env *env,
-                              const struct cl_object *obj, struct ost_lvb *lvb)
+int osc_object_glimpse(const struct lu_env *env, const struct cl_object *obj,
+		       struct ost_lvb *lvb)
 {
-        struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
+	struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
 
-        ENTRY;
-        lvb->lvb_size   = oinfo->loi_kms;
-        lvb->lvb_blocks = oinfo->loi_lvb.lvb_blocks;
-        RETURN(0);
+	lvb->lvb_size = oinfo->loi_kms;
+	lvb->lvb_blocks = oinfo->loi_lvb.lvb_blocks;
+	return 0;
 }
+EXPORT_SYMBOL(osc_object_glimpse);
 
 static int osc_object_ast_clear(struct ldlm_lock *lock, void *data)
 {
 	ENTRY;
 
-	LASSERT(lock->l_granted_mode == lock->l_req_mode);
 	if (lock->l_ast_data == data)
 		lock->l_ast_data = NULL;
 	RETURN(LDLM_ITER_CONTINUE);
 }
 
-static int osc_object_prune(const struct lu_env *env, struct cl_object *obj)
+int osc_object_prune(const struct lu_env *env, struct cl_object *obj)
 {
-	struct osc_object       *osc = cl2osc(obj);
-	struct ldlm_res_id      *resname = &osc_env_info(env)->oti_resname;
-
-	LASSERTF(osc->oo_npages == 0,
-		 DFID "still have %lu pages, obj: %p, osc: %p\n",
-		 PFID(lu_object_fid(&obj->co_lu)), osc->oo_npages, obj, osc);
+	struct osc_object  *osc = cl2osc(obj);
+	struct ldlm_res_id *resname = &osc_env_info(env)->oti_resname;
 
 	/* DLM locks don't hold a reference of osc_object so we have to
 	 * clear it before the object is being destroyed. */
-	ostid_build_res_name(&osc->oo_oinfo->loi_oi, resname);
+	osc_build_res_name(osc, resname);
 	ldlm_resource_iterate(osc_export(osc)->exp_obd->obd_namespace, resname,
 			      osc_object_ast_clear, osc);
 	return 0;
 }
+EXPORT_SYMBOL(osc_object_prune);
 
-void osc_object_set_contended(struct osc_object *obj)
+static int osc_object_fiemap(const struct lu_env *env, struct cl_object *obj,
+			     struct ll_fiemap_info_key *fmkey,
+			     struct fiemap *fiemap, size_t *buflen)
 {
-        obj->oo_contention_time = cfs_time_current();
-        /* mb(); */
-        obj->oo_contended = 1;
-}
+	struct obd_export *exp = osc_export(cl2osc(obj));
+	struct ldlm_res_id resid;
+	union ldlm_policy_data policy;
+	struct lustre_handle lockh;
+	enum ldlm_mode mode = LCK_MINMODE;
+	struct ptlrpc_request *req;
+	struct fiemap *reply;
+	char *tmp;
+	int rc;
+	ENTRY;
 
-void osc_object_clear_contended(struct osc_object *obj)
-{
-        obj->oo_contended = 0;
+	fmkey->lfik_oa.o_oi = cl2osc(obj)->oo_oinfo->loi_oi;
+	if (!(fmkey->lfik_fiemap.fm_flags & FIEMAP_FLAG_SYNC))
+		goto skip_locking;
+
+	policy.l_extent.start = fmkey->lfik_fiemap.fm_start & PAGE_MASK;
+
+	if (OBD_OBJECT_EOF - fmkey->lfik_fiemap.fm_length <=
+	    fmkey->lfik_fiemap.fm_start + PAGE_SIZE - 1)
+		policy.l_extent.end = OBD_OBJECT_EOF;
+	else
+		policy.l_extent.end = (fmkey->lfik_fiemap.fm_start +
+				       fmkey->lfik_fiemap.fm_length +
+				       PAGE_SIZE - 1) & PAGE_MASK;
+
+	ostid_build_res_name(&fmkey->lfik_oa.o_oi, &resid);
+	mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
+			       LDLM_FL_BLOCK_GRANTED | LDLM_FL_LVB_READY,
+			       &resid, LDLM_EXTENT, &policy,
+			       LCK_PR | LCK_PW, &lockh, 0);
+	if (mode) { /* lock is cached on client */
+		if (mode != LCK_PR) {
+			ldlm_lock_addref(&lockh, LCK_PR);
+			ldlm_lock_decref(&lockh, LCK_PW);
+		}
+	} else { /* no cached lock, needs acquire lock on server side */
+		fmkey->lfik_oa.o_valid |= OBD_MD_FLFLAGS;
+		fmkey->lfik_oa.o_flags |= OBD_FL_SRVLOCK;
+	}
+
+skip_locking:
+	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+				   &RQF_OST_GET_INFO_FIEMAP);
+	if (req == NULL)
+		GOTO(drop_lock, rc = -ENOMEM);
+
+	req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY, RCL_CLIENT,
+			     sizeof(*fmkey));
+	req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL, RCL_CLIENT,
+			     *buflen);
+	req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL, RCL_SERVER,
+			     *buflen);
+
+	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
+	if (rc != 0) {
+		ptlrpc_request_free(req);
+		GOTO(drop_lock, rc);
+	}
+	tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
+	memcpy(tmp, fmkey, sizeof(*fmkey));
+	tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
+	memcpy(tmp, fiemap, *buflen);
+	ptlrpc_request_set_replen(req);
+
+	rc = ptlrpc_queue_wait(req);
+	if (rc != 0)
+		GOTO(fini_req, rc);
+
+	reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
+	if (reply == NULL)
+		GOTO(fini_req, rc = -EPROTO);
+
+	memcpy(fiemap, reply, *buflen);
+fini_req:
+	ptlrpc_req_finished(req);
+drop_lock:
+	if (mode)
+		ldlm_lock_decref(&lockh, LCK_PR);
+	RETURN(rc);
 }
 
 int osc_object_is_contended(struct osc_object *obj)
 {
-        struct osc_device *dev  = lu2osc_dev(obj->oo_cl.co_lu.lo_dev);
-        int osc_contention_time = dev->od_contention_time;
-        cfs_time_t cur_time     = cfs_time_current();
-        cfs_time_t retry_time;
+	struct osc_device *dev = lu2osc_dev(obj->oo_cl.co_lu.lo_dev);
+	time64_t osc_contention_time = dev->od_contention_time;
+	ktime_t retry_time;
 
         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_OBJECT_CONTENTION))
                 return 1;
@@ -257,27 +318,108 @@ int osc_object_is_contended(struct osc_object *obj)
         if (!obj->oo_contended)
                 return 0;
 
-        /*
-         * I like copy-paste. the code is copied from
-         * ll_file_is_contended.
-         */
-        retry_time = cfs_time_add(obj->oo_contention_time,
-                                  cfs_time_seconds(osc_contention_time));
-        if (cfs_time_after(cur_time, retry_time)) {
-                osc_object_clear_contended(obj);
-                return 0;
-        }
-        return 1;
+	/*
+	 * I like copy-paste. the code is copied from
+	 * ll_file_is_contended.
+	 */
+	retry_time = ktime_add_ns(obj->oo_contention_time,
+				  osc_contention_time * NSEC_PER_SEC);
+	if (ktime_after(ktime_get(), retry_time)) {
+		osc_object_clear_contended(obj);
+		return 0;
+	}
+	return 1;
+}
+EXPORT_SYMBOL(osc_object_is_contended);
+
+/**
+ * Implementation of struct cl_object_operations::coo_req_attr_set() for osc
+ * layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq
+ * fields.
+ */
+static void osc_req_attr_set(const struct lu_env *env, struct cl_object *obj,
+			     struct cl_req_attr *attr)
+{
+	struct lov_oinfo *oinfo;
+	struct obdo      *oa;
+	struct ost_lvb   *lvb;
+	u64		  flags = attr->cra_flags;
+
+	oinfo   = cl2osc(obj)->oo_oinfo;
+	lvb     = &oinfo->loi_lvb;
+	oa      = attr->cra_oa;
+
+	if ((flags & OBD_MD_FLMTIME) != 0) {
+		oa->o_mtime = lvb->lvb_mtime;
+		oa->o_valid |= OBD_MD_FLMTIME;
+	}
+	if ((flags & OBD_MD_FLATIME) != 0) {
+		oa->o_atime = lvb->lvb_atime;
+		oa->o_valid |= OBD_MD_FLATIME;
+	}
+	if ((flags & OBD_MD_FLCTIME) != 0) {
+		oa->o_ctime = lvb->lvb_ctime;
+		oa->o_valid |= OBD_MD_FLCTIME;
+	}
+	if (flags & OBD_MD_FLGROUP) {
+		ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi));
+		oa->o_valid |= OBD_MD_FLGROUP;
+	}
+	if (flags & OBD_MD_FLID) {
+		int rc;
+
+		rc = ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi));
+		if (rc) {
+			CERROR("Bad %llu to set " DOSTID " : rc %d\n",
+			       (unsigned long long)ostid_id(&oinfo->loi_oi),
+			       POSTID(&oa->o_oi), rc);
+		}
+		oa->o_valid |= OBD_MD_FLID;
+	}
+	if (flags & OBD_MD_FLHANDLE) {
+		struct ldlm_lock *lock;
+		struct osc_page *opg;
+
+		opg = osc_cl_page_osc(attr->cra_page, cl2osc(obj));
+		lock = osc_dlmlock_at_pgoff(env, cl2osc(obj), osc_index(opg),
+				OSC_DAP_FL_TEST_LOCK | OSC_DAP_FL_CANCELING);
+		if (lock == NULL && !opg->ops_srvlock) {
+			struct ldlm_resource *res;
+			struct ldlm_res_id *resname;
+
+			CL_PAGE_DEBUG(D_ERROR, env, attr->cra_page,
+				      "uncovered page!\n");
+
+			resname = &osc_env_info(env)->oti_resname;
+			ostid_build_res_name(&oinfo->loi_oi, resname);
+			res = ldlm_resource_get(
+				osc_export(cl2osc(obj))->exp_obd->obd_namespace,
+				NULL, resname, LDLM_EXTENT, 0);
+			ldlm_resource_dump(D_ERROR, res);
+
+			libcfs_debug_dumpstack(NULL);
+			LBUG();
+		}
+
+		/* check for lockless io. */
+		if (lock != NULL) {
+			oa->o_handle = lock->l_remote_handle;
+			oa->o_valid |= OBD_MD_FLHANDLE;
+			LDLM_LOCK_PUT(lock);
+		}
+	}
 }
 
 static const struct cl_object_operations osc_ops = {
-	.coo_page_init = osc_page_init,
-	.coo_lock_init = osc_lock_init,
-	.coo_io_init   = osc_io_init,
-	.coo_attr_get  = osc_attr_get,
-	.coo_attr_set  = osc_attr_set,
-	.coo_glimpse   = osc_object_glimpse,
-	.coo_prune     = osc_object_prune
+	.coo_page_init    = osc_page_init,
+	.coo_lock_init    = osc_lock_init,
+	.coo_io_init      = osc_io_init,
+	.coo_attr_get     = osc_attr_get,
+	.coo_attr_update  = osc_attr_update,
+	.coo_glimpse      = osc_object_glimpse,
+	.coo_prune        = osc_object_prune,
+	.coo_fiemap       = osc_object_fiemap,
+	.coo_req_attr_set = osc_req_attr_set
 };
 
 static const struct lu_object_operations osc_lu_obj_ops = {
@@ -301,9 +443,32 @@ struct lu_object *osc_object_alloc(const struct lu_env *env,
 		lu_object_init(obj, NULL, dev);
 		osc->oo_cl.co_ops = &osc_ops;
 		obj->lo_ops = &osc_lu_obj_ops;
+		osc->oo_obj_ops = &osc_object_ops;
 	} else
 		obj = NULL;
 	return obj;
 }
 
+int osc_object_invalidate(const struct lu_env *env, struct osc_object *osc)
+{
+	struct l_wait_info lwi = { 0 };
+	ENTRY;
+
+	CDEBUG(D_INODE, "Invalidate osc object: %p, # of active IOs: %d\n",
+	       osc, atomic_read(&osc->oo_nr_ios));
+
+	l_wait_event(osc->oo_io_waitq, atomic_read(&osc->oo_nr_ios) == 0, &lwi);
+
+	/* Discard all dirty pages of this object. */
+	osc_cache_truncate_start(env, osc, 0, NULL);
+
+	/* Discard all caching pages */
+	osc_lock_discard_pages(env, osc, 0, CL_PAGE_EOF, true);
+
+	/* Clear ast data of dlm lock. Do this after discarding all pages */
+	osc_object_prune(env, osc2cl(osc));
+
+	RETURN(0);
+}
+EXPORT_SYMBOL(osc_object_invalidate);
 /** @} osc */