Whamcloud - gitweb
LU-14286 osd-ldiskfs: fallocate() should zero new blocks
[fs/lustre-release.git] / lustre / mdc / mdc_dev.c
index a59b1a8..75d44ba 100644 (file)
 #include "mdc_internal.h"
 
 static void mdc_lock_build_policy(const struct lu_env *env,
+                                 const struct cl_lock *lock,
                                  union ldlm_policy_data *policy)
 {
        memset(policy, 0, sizeof *policy);
        policy->l_inodebits.bits = MDS_INODELOCK_DOM;
+       if (lock) {
+               policy->l_inodebits.li_gid = lock->cll_descr.cld_gid;
+       }
 }
 
 int mdc_ldlm_glimpse_ast(struct ldlm_lock *dlmlock, void *data)
@@ -68,21 +72,17 @@ static void mdc_lock_lvb_update(const struct lu_env *env,
                                struct ldlm_lock *dlmlock,
                                struct ost_lvb *lvb);
 
-static int mdc_set_dom_lock_data(const struct lu_env *env,
-                                struct ldlm_lock *lock, void *data)
+static int mdc_set_dom_lock_data(struct ldlm_lock *lock, void *data)
 {
-       struct osc_object *obj = data;
        int set = 0;
 
        LASSERT(lock != NULL);
        LASSERT(lock->l_glimpse_ast == mdc_ldlm_glimpse_ast);
 
        lock_res_and_lock(lock);
-       if (lock->l_ast_data == NULL) {
-               lock->l_ast_data = data;
-               mdc_lock_lvb_update(env, obj, lock, NULL);
-       }
 
+       if (lock->l_ast_data == NULL)
+               lock->l_ast_data = data;
        if (lock->l_ast_data == data)
                set = 1;
 
@@ -92,10 +92,11 @@ static int mdc_set_dom_lock_data(const struct lu_env *env,
 }
 
 int mdc_dom_lock_match(const struct lu_env *env, struct obd_export *exp,
-                      struct ldlm_res_id *res_id,
-                      enum ldlm_type type, union ldlm_policy_data *policy,
-                      enum ldlm_mode mode, __u64 *flags, void *data,
-                      struct lustre_handle *lockh, int unref)
+                      struct ldlm_res_id *res_id, enum ldlm_type type,
+                      union ldlm_policy_data *policy, enum ldlm_mode mode,
+                      __u64 *flags, struct osc_object *obj,
+                      struct lustre_handle *lockh,
+                      enum ldlm_match_flags match_flags)
 {
        struct obd_device *obd = exp->exp_obd;
        __u64 lflags = *flags;
@@ -103,16 +104,24 @@ int mdc_dom_lock_match(const struct lu_env *env, struct obd_export *exp,
 
        ENTRY;
 
-       rc = ldlm_lock_match(obd->obd_namespace, lflags,
-                            res_id, type, policy, mode, lockh, unref);
+       rc = ldlm_lock_match_with_skip(obd->obd_namespace, lflags, 0,
+                            res_id, type, policy, mode, lockh, match_flags);
        if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
                RETURN(rc);
 
-       if (data != NULL) {
+       if (obj != NULL) {
                struct ldlm_lock *lock = ldlm_handle2lock(lockh);
 
                LASSERT(lock != NULL);
-               if (!mdc_set_dom_lock_data(env, lock, data)) {
+               if (mdc_set_dom_lock_data(lock, obj)) {
+                       lock_res_and_lock(lock);
+                       if (!ldlm_is_lvb_cached(lock)) {
+                               LASSERT(lock->l_ast_data == obj);
+                               mdc_lock_lvb_update(env, obj, lock, NULL);
+                               ldlm_set_lvb_cached(lock);
+                       }
+                       unlock_res_and_lock(lock);
+               } else {
                        ldlm_lock_decref(lockh, rc);
                        rc = 0;
                }
@@ -136,16 +145,24 @@ struct ldlm_lock *mdc_dlmlock_at_pgoff(const struct lu_env *env,
        struct ldlm_lock *lock = NULL;
        enum ldlm_mode mode;
        __u64 flags;
+       enum ldlm_match_flags match_flags = 0;
 
        ENTRY;
 
        fid_build_reg_res_name(lu_object_fid(osc2lu(obj)), resname);
-       mdc_lock_build_policy(env, policy);
+       mdc_lock_build_policy(env, NULL, policy);
+       policy->l_inodebits.li_gid = LDLM_GID_ANY;
 
        flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
        if (dap_flags & OSC_DAP_FL_TEST_LOCK)
                flags |= LDLM_FL_TEST_LOCK;
 
+       if (dap_flags & OSC_DAP_FL_AST)
+               match_flags |= LDLM_MATCH_AST;
+
+       if (dap_flags & OSC_DAP_FL_CANCELING)
+               match_flags |= LDLM_MATCH_UNREF;
+
 again:
        /* Next, search for already existing extent locks that will cover us */
        /* If we're trying to read, we also search for an existing PW lock.  The
@@ -153,8 +170,7 @@ again:
         * writers can share a single PW lock. */
        mode = mdc_dom_lock_match(env, osc_export(obj), resname, LDLM_IBITS,
                                  policy, LCK_PR | LCK_PW | LCK_GROUP, &flags,
-                                 obj, &lockh,
-                                 dap_flags & OSC_DAP_FL_CANCELING);
+                                 obj, &lockh, match_flags);
        if (mode != 0) {
                lock = ldlm_handle2lock(&lockh);
                /* RACE: the lock is cancelled so let's try again */
@@ -168,8 +184,8 @@ again:
 /**
  * Check if page @page is covered by an extra lock or discard it.
  */
-static int mdc_check_and_discard_cb(const struct lu_env *env, struct cl_io *io,
-                                   struct osc_page *ops, void *cbdata)
+static bool mdc_check_and_discard_cb(const struct lu_env *env, struct cl_io *io,
+                                    struct osc_page *ops, void *cbdata)
 {
        struct osc_thread_info *info = osc_env_info(env);
        struct osc_object *osc = cbdata;
@@ -182,7 +198,7 @@ static int mdc_check_and_discard_cb(const struct lu_env *env, struct cl_io *io,
 
                /* refresh non-overlapped index */
                tmp = mdc_dlmlock_at_pgoff(env, osc, index,
-                                          OSC_DAP_FL_TEST_LOCK);
+                                          OSC_DAP_FL_TEST_LOCK | OSC_DAP_FL_AST);
                if (tmp != NULL) {
                        info->oti_fn_index = CL_PAGE_EOF;
                        LDLM_LOCK_PUT(tmp);
@@ -196,7 +212,7 @@ static int mdc_check_and_discard_cb(const struct lu_env *env, struct cl_io *io,
        }
 
        info->oti_next_index = index + 1;
-       return CLP_GANG_OKAY;
+       return true;
 }
 
 /**
@@ -215,7 +231,6 @@ static int mdc_lock_discard_pages(const struct lu_env *env,
        struct osc_thread_info *info = osc_env_info(env);
        struct cl_io *io = &info->oti_io;
        osc_page_gang_cbt cb;
-       int res;
        int result;
 
        ENTRY;
@@ -228,15 +243,9 @@ static int mdc_lock_discard_pages(const struct lu_env *env,
 
        cb = discard ? osc_discard_cb : mdc_check_and_discard_cb;
        info->oti_fn_index = info->oti_next_index = start;
-       do {
-               res = osc_page_gang_lookup(env, io, osc, info->oti_next_index,
-                                          end, cb, (void *)osc);
-               if (info->oti_next_index > end)
-                       break;
 
-               if (res == CLP_GANG_RESCHED)
-                       cond_resched();
-       } while (res != CLP_GANG_OKAY);
+       osc_page_gang_lookup(env, io, osc, info->oti_next_index,
+                            end, cb, (void *)osc);
 out:
        cl_io_fini(env, io);
        RETURN(result);
@@ -261,7 +270,9 @@ static int mdc_lock_flush(const struct lu_env *env, struct osc_object *obj,
                        result = 0;
        }
 
-       rc = mdc_lock_discard_pages(env, obj, start, end, discard);
+       /* Avoid lock matching with CLM_WRITE, there can be no other locks */
+       rc = mdc_lock_discard_pages(env, obj, start, end,
+                                   mode == CLM_WRITE || discard);
        if (result == 0 && rc < 0)
                result = rc;
 
@@ -290,9 +301,8 @@ void mdc_lock_lockless_cancel(const struct lu_env *env,
  * Helper for osc_dlm_blocking_ast() handling discrepancies between cl_lock
  * and ldlm_lock caches.
  */
-static int mdc_dlm_blocking_ast0(const struct lu_env *env,
-                                struct ldlm_lock *dlmlock,
-                                void *data, int flag)
+static int mdc_dlm_canceling(const struct lu_env *env,
+                            struct ldlm_lock *dlmlock)
 {
        struct cl_object *obj = NULL;
        int result = 0;
@@ -301,11 +311,8 @@ static int mdc_dlm_blocking_ast0(const struct lu_env *env,
 
        ENTRY;
 
-       LASSERT(flag == LDLM_CB_CANCELING);
-       LASSERT(dlmlock != NULL);
-
        lock_res_and_lock(dlmlock);
-       if (dlmlock->l_granted_mode != dlmlock->l_req_mode) {
+       if (!ldlm_is_granted(dlmlock)) {
                dlmlock->l_ast_data = NULL;
                unlock_res_and_lock(dlmlock);
                RETURN(0);
@@ -317,10 +324,8 @@ static int mdc_dlm_blocking_ast0(const struct lu_env *env,
 
        if (dlmlock->l_ast_data != NULL) {
                obj = osc2cl(dlmlock->l_ast_data);
-               dlmlock->l_ast_data = NULL;
                cl_object_get(obj);
        }
-       ldlm_set_kms_ignore(dlmlock);
        unlock_res_and_lock(dlmlock);
 
        /* if l_ast_data is NULL, the dlmlock was enqueued by AGL or
@@ -336,6 +341,7 @@ static int mdc_dlm_blocking_ast0(const struct lu_env *env,
                 */
                /* losing a lock, update kms */
                lock_res_and_lock(dlmlock);
+               dlmlock->l_ast_data = NULL;
                cl_object_attr_lock(obj);
                attr->cat_kms = 0;
                cl_object_attr_update(env, obj, attr, CAT_KMS);
@@ -347,13 +353,13 @@ static int mdc_dlm_blocking_ast0(const struct lu_env *env,
 }
 
 int mdc_ldlm_blocking_ast(struct ldlm_lock *dlmlock,
-                         struct ldlm_lock_desc *new, void *data, int flag)
+                         struct ldlm_lock_desc *new, void *data, int reason)
 {
        int rc = 0;
 
        ENTRY;
 
-       switch (flag) {
+       switch (reason) {
        case LDLM_CB_BLOCKING: {
                struct lustre_handle lockh;
 
@@ -384,7 +390,7 @@ int mdc_ldlm_blocking_ast(struct ldlm_lock *dlmlock,
                        break;
                }
 
-               rc = mdc_dlm_blocking_ast0(env, dlmlock, data, flag);
+               rc = mdc_dlm_canceling(env, dlmlock);
                cl_env_put(env, &refcheck);
                break;
        }
@@ -410,6 +416,7 @@ void mdc_lock_lvb_update(const struct lu_env *env, struct osc_object *osc,
        struct cl_attr *attr = &osc_env_info(env)->oti_attr;
        unsigned valid = CAT_BLOCKS | CAT_ATIME | CAT_CTIME | CAT_MTIME |
                         CAT_SIZE;
+       unsigned int setkms = 0;
 
        ENTRY;
 
@@ -427,24 +434,32 @@ void mdc_lock_lvb_update(const struct lu_env *env, struct osc_object *osc,
                size = lvb->lvb_size;
 
                if (size >= oinfo->loi_kms) {
-                       LDLM_DEBUG(dlmlock, "lock acquired, setting rss=%llu,"
-                                  " kms=%llu", lvb->lvb_size, size);
                        valid |= CAT_KMS;
                        attr->cat_kms = size;
-               } else {
-                       LDLM_DEBUG(dlmlock, "lock acquired, setting rss=%llu,"
-                                  " leaving kms=%llu",
-                                  lvb->lvb_size, oinfo->loi_kms);
+                       setkms = 1;
                }
+               ldlm_lock_allow_match_locked(dlmlock);
        }
+
+       /* The size should not be less than the kms */
+       if (attr->cat_size < oinfo->loi_kms)
+               attr->cat_size = oinfo->loi_kms;
+
+       LDLM_DEBUG(dlmlock, "acquired size %llu, setting rss=%llu;%s "
+                  "kms=%llu, end=%llu", lvb->lvb_size, attr->cat_size,
+                  setkms ? "" : " leaving",
+                  setkms ? attr->cat_kms : oinfo->loi_kms,
+                  dlmlock ? dlmlock->l_policy_data.l_extent.end : -1ull);
+
        cl_object_attr_update(env, obj, attr, valid);
        cl_object_attr_unlock(obj);
        EXIT;
 }
 
 static void mdc_lock_granted(const struct lu_env *env, struct osc_lock *oscl,
-                            struct lustre_handle *lockh, bool lvb_update)
+                            struct lustre_handle *lockh)
 {
+       struct osc_object *osc = cl2osc(oscl->ols_cl.cls_obj);
        struct ldlm_lock *dlmlock;
 
        ENTRY;
@@ -473,7 +488,7 @@ static void mdc_lock_granted(const struct lu_env *env, struct osc_lock *oscl,
 
        /* Lock must have been granted. */
        lock_res_and_lock(dlmlock);
-       if (dlmlock->l_granted_mode == dlmlock->l_req_mode) {
+       if (ldlm_is_granted(dlmlock)) {
                struct cl_lock_descr *descr = &oscl->ols_cl.cls_lock->cll_descr;
 
                /* extend the lock extent, otherwise it will have problem when
@@ -483,10 +498,11 @@ static void mdc_lock_granted(const struct lu_env *env, struct osc_lock *oscl,
                descr->cld_end = CL_PAGE_EOF;
 
                /* no lvb update for matched lock */
-               if (lvb_update) {
+               if (!ldlm_is_lvb_cached(dlmlock)) {
                        LASSERT(oscl->ols_flags & LDLM_FL_LVB_READY);
-                       mdc_lock_lvb_update(env, cl2osc(oscl->ols_cl.cls_obj),
-                                           dlmlock, NULL);
+                       LASSERT(osc == dlmlock->l_ast_data);
+                       mdc_lock_lvb_update(env, osc, dlmlock, NULL);
+                       ldlm_set_lvb_cached(dlmlock);
                }
        }
        unlock_res_and_lock(dlmlock);
@@ -498,7 +514,7 @@ static void mdc_lock_granted(const struct lu_env *env, struct osc_lock *oscl,
 
 /**
  * Lock upcall function that is executed either when a reply to ENQUEUE rpc is
- * received from a server, or after osc_enqueue_base() matched a local DLM
+ * received from a server, or after mdc_enqueue_send() matched a local DLM
  * lock.
  */
 static int mdc_lock_upcall(void *cookie, struct lustre_handle *lockh,
@@ -527,7 +543,7 @@ static int mdc_lock_upcall(void *cookie, struct lustre_handle *lockh,
 
        CDEBUG(D_INODE, "rc %d, err %d\n", rc, errcode);
        if (rc == 0)
-               mdc_lock_granted(env, oscl, lockh, errcode == ELDLM_OK);
+               mdc_lock_granted(env, oscl, lockh);
 
        /* Error handling, some errors are tolerable. */
        if (oscl->ols_locklessable && rc == -EUSERS) {
@@ -556,53 +572,66 @@ static int mdc_lock_upcall(void *cookie, struct lustre_handle *lockh,
        RETURN(rc);
 }
 
+/* This is needed only for old servers (before 2.14) support */
 int mdc_fill_lvb(struct ptlrpc_request *req, struct ost_lvb *lvb)
 {
        struct mdt_body *body;
 
+       /* get LVB data from mdt_body otherwise */
        body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
        if (!body)
                RETURN(-EPROTO);
 
-       lvb->lvb_mtime = body->mbo_mtime;
-       lvb->lvb_atime = body->mbo_atime;
-       lvb->lvb_ctime = body->mbo_ctime;
-       lvb->lvb_blocks = body->mbo_dom_blocks;
-       lvb->lvb_size = body->mbo_dom_size;
+       if (!(body->mbo_valid & OBD_MD_DOM_SIZE))
+               RETURN(-EPROTO);
 
+       mdc_body2lvb(body, lvb);
        RETURN(0);
 }
 
-int mdc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
-                    void *cookie, struct lustre_handle *lockh,
-                    enum ldlm_mode mode, __u64 *flags, int errcode)
+int mdc_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
+                    osc_enqueue_upcall_f upcall, void *cookie,
+                    struct lustre_handle *lockh, enum ldlm_mode mode,
+                    __u64 *flags, int errcode)
 {
        struct osc_lock *ols = cookie;
-       struct ldlm_lock *lock;
+       bool glimpse = *flags & LDLM_FL_HAS_INTENT;
        int rc = 0;
 
        ENTRY;
 
-       /* The request was created before ldlm_cli_enqueue call. */
-       if (errcode == ELDLM_LOCK_ABORTED) {
+       /* needed only for glimpse from an old server (< 2.14) */
+       if (glimpse && !exp_connect_dom_lvb(exp))
+               rc = mdc_fill_lvb(req, &ols->ols_lvb);
+
+       if (glimpse && errcode == ELDLM_LOCK_ABORTED) {
                struct ldlm_reply *rep;
 
                rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
-               LASSERT(rep != NULL);
-
-               rep->lock_policy_res2 =
-                       ptlrpc_status_ntoh(rep->lock_policy_res2);
-               if (rep->lock_policy_res2)
-                       errcode = rep->lock_policy_res2;
-
-               rc = mdc_fill_lvb(req, &ols->ols_lvb);
+               if (likely(rep)) {
+                       rep->lock_policy_res2 =
+                               ptlrpc_status_ntoh(rep->lock_policy_res2);
+                       if (rep->lock_policy_res2)
+                               errcode = rep->lock_policy_res2;
+               } else {
+                       rc = -EPROTO;
+               }
                *flags |= LDLM_FL_LVB_READY;
        } else if (errcode == ELDLM_OK) {
+               struct ldlm_lock *lock;
+
                /* Callers have references, should be valid always */
                lock = ldlm_handle2lock(lockh);
-               LASSERT(lock);
 
-               rc = mdc_fill_lvb(req, &lock->l_ost_lvb);
+               /* At this point ols_lvb must be filled with correct LVB either
+                * by mdc_fill_lvb() above or by ldlm_cli_enqueue_fini().
+                * DoM uses l_ost_lvb to store LVB data, so copy it here from
+                * just updated ols_lvb.
+                */
+               lock_res_and_lock(lock);
+               memcpy(&lock->l_ost_lvb, &ols->ols_lvb,
+                      sizeof(lock->l_ost_lvb));
+               unlock_res_and_lock(lock);
                LDLM_LOCK_PUT(lock);
                *flags |= LDLM_FL_LVB_READY;
        }
@@ -626,6 +655,10 @@ int mdc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
        struct ldlm_lock *lock;
        struct lustre_handle *lockh = &aa->oa_lockh;
        enum ldlm_mode mode = aa->oa_mode;
+       struct ldlm_enqueue_info einfo = {
+               .ei_type = aa->oa_type,
+               .ei_mode = mode,
+       };
 
        ENTRY;
 
@@ -641,7 +674,8 @@ int mdc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
        /* Take an additional reference so that a blocking AST that
         * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
         * to arrive after an upcall has been executed by
-        * osc_enqueue_fini(). */
+        * mdc_enqueue_fini().
+        */
        ldlm_lock_addref(lockh, mode);
 
        /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
@@ -651,12 +685,12 @@ int mdc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
        OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
 
        /* Complete obtaining the lock procedure. */
-       rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
-                                  aa->oa_mode, aa->oa_flags, NULL, 0,
-                                  lockh, rc);
+       rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, &einfo, 1, aa->oa_flags,
+                                  aa->oa_lvb, aa->oa_lvb ?
+                                  sizeof(*aa->oa_lvb) : 0, lockh, rc);
        /* Complete mdc stuff. */
-       rc = mdc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
-                             aa->oa_flags, rc);
+       rc = mdc_enqueue_fini(aa->oa_exp, req, aa->oa_upcall, aa->oa_cookie,
+                             lockh, mode, aa->oa_flags, rc);
 
        OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
 
@@ -674,8 +708,7 @@ int mdc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
  * release locks just after they are obtained. */
 int mdc_enqueue_send(const struct lu_env *env, struct obd_export *exp,
                     struct ldlm_res_id *res_id, __u64 *flags,
-                    union ldlm_policy_data *policy,
-                    struct ost_lvb *lvb, int kms_valid,
+                    union ldlm_policy_data *policy, struct ost_lvb *lvb,
                     osc_enqueue_upcall_f upcall, void *cookie,
                     struct ldlm_enqueue_info *einfo, int async)
 {
@@ -686,8 +719,10 @@ int mdc_enqueue_send(const struct lu_env *env, struct obd_export *exp,
        enum ldlm_mode mode;
        bool glimpse = *flags & LDLM_FL_HAS_INTENT;
        __u64 match_flags = *flags;
-       struct list_head cancels = LIST_HEAD_INIT(cancels);
+       LIST_HEAD(cancels);
        int rc, count;
+       int lvb_size;
+       bool compat_glimpse = glimpse && !exp_connect_dom_lvb(exp);
 
        ENTRY;
 
@@ -695,16 +730,11 @@ int mdc_enqueue_send(const struct lu_env *env, struct obd_export *exp,
        if (einfo->ei_mode == LCK_PR)
                mode |= LCK_PW;
 
+       match_flags |= LDLM_FL_LVB_READY;
        if (glimpse)
                match_flags |= LDLM_FL_BLOCK_GRANTED;
-       /* DOM locking uses LDLM_FL_KMS_IGNORE to mark locks wich have no valid
-        * LVB information, e.g. canceled locks or locks of just pruned object,
-        * such locks should be skipped.
-        */
-       mode = ldlm_lock_match_with_skip(obd->obd_namespace, match_flags,
-                                        LDLM_FL_KMS_IGNORE, res_id,
-                                        einfo->ei_type, policy, mode,
-                                        &lockh, 0);
+       mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
+                              einfo->ei_type, policy, mode, &lockh);
        if (mode) {
                struct ldlm_lock *matched;
 
@@ -712,18 +742,11 @@ int mdc_enqueue_send(const struct lu_env *env, struct obd_export *exp,
                        RETURN(ELDLM_OK);
 
                matched = ldlm_handle2lock(&lockh);
-               /* this shouldn't happen but this check is kept to make
-                * related test fail if problem occurs
-                */
-               if (unlikely(ldlm_is_kms_ignore(matched))) {
-                       LDLM_ERROR(matched, "matched lock has KMS ignore flag");
-                       goto no_match;
-               }
 
                if (OBD_FAIL_CHECK(OBD_FAIL_MDC_GLIMPSE_DDOS))
                        ldlm_set_kms_ignore(matched);
 
-               if (mdc_set_dom_lock_data(env, matched, einfo->ei_cbdata)) {
+               if (mdc_set_dom_lock_data(matched, einfo->ei_cbdata)) {
                        *flags |= LDLM_FL_LVB_READY;
 
                        /* We already have a lock, and it's referenced. */
@@ -733,7 +756,6 @@ int mdc_enqueue_send(const struct lu_env *env, struct obd_export *exp,
                        LDLM_LOCK_PUT(matched);
                        RETURN(ELDLM_OK);
                }
-no_match:
                ldlm_lock_decref(&lockh, mode);
                LDLM_LOCK_PUT(matched);
        }
@@ -741,7 +763,9 @@ no_match:
        if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
                RETURN(-ENOLCK);
 
-       req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_INTENT);
+       /* Glimpse is intent on old server */
+       req = ptlrpc_request_alloc(class_exp2cliimp(exp), compat_glimpse ?
+                                  &RQF_LDLM_INTENT : &RQF_LDLM_ENQUEUE);
        if (req == NULL)
                RETURN(-ENOMEM);
 
@@ -759,26 +783,33 @@ no_match:
                RETURN(rc);
        }
 
-       /* pack the intent */
-       lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
-       lit->opc = glimpse ? IT_GLIMPSE : IT_BRW;
-
-       req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, 0);
-       req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER, 0);
-       ptlrpc_request_set_replen(req);
+       if (compat_glimpse) {
+               /* pack the glimpse intent */
+               lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
+               lit->opc = IT_GLIMPSE;
+       }
 
        /* users of mdc_enqueue() can pass this flag for ldlm_lock_match() */
        *flags &= ~LDLM_FL_BLOCK_GRANTED;
-       /* All MDC IO locks are intents */
-       *flags |= LDLM_FL_HAS_INTENT;
-       rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, NULL,
-                             0, LVB_T_NONE, &lockh, async);
+
+       if (compat_glimpse) {
+               req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, 0);
+               req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER, 0);
+               lvb_size = 0;
+       } else {
+               lvb_size = sizeof(*lvb);
+               req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
+                                    lvb_size);
+       }
+       ptlrpc_request_set_replen(req);
+
+       rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
+                             lvb_size, LVB_T_OST, &lockh, async);
        if (async) {
                if (!rc) {
                        struct osc_enqueue_args *aa;
 
-                       CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
-                       aa = ptlrpc_req_async_args(req);
+                       aa = ptlrpc_req_async_args(aa, req);
                        aa->oa_exp = exp;
                        aa->oa_mode = einfo->ei_mode;
                        aa->oa_type = einfo->ei_type;
@@ -787,7 +818,7 @@ no_match:
                        aa->oa_cookie = cookie;
                        aa->oa_speculative = false;
                        aa->oa_flags = flags;
-                       aa->oa_lvb = lvb;
+                       aa->oa_lvb = compat_glimpse ? NULL : lvb;
 
                        req->rq_interpret_reply = mdc_enqueue_interpret;
                        ptlrpcd_add_req(req);
@@ -797,7 +828,7 @@ no_match:
                RETURN(rc);
        }
 
-       rc = mdc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
+       rc = mdc_enqueue_fini(exp, req, upcall, cookie, &lockh, einfo->ei_mode,
                              flags, rc);
        ptlrpc_req_finished(req);
        RETURN(rc);
@@ -881,11 +912,10 @@ enqueue_base:
         * osc_lock.
         */
        fid_build_reg_res_name(lu_object_fid(osc2lu(osc)), resname);
-       mdc_lock_build_policy(env, policy);
+       mdc_lock_build_policy(env, lock, policy);
        LASSERT(!oscl->ols_speculative);
        result = mdc_enqueue_send(env, osc_export(osc), resname,
-                                 &oscl->ols_flags, policy,
-                                 &oscl->ols_lvb, osc->oo_oinfo->loi_kms_valid,
+                                 &oscl->ols_flags, policy, &oscl->ols_lvb,
                                  upcall, cookie, &oscl->ols_einfo, async);
        if (result == 0) {
                if (osc_lock_is_lockless(oscl)) {
@@ -947,6 +977,8 @@ int mdc_lock_init(const struct lu_env *env, struct cl_object *obj,
 
        ols->ols_flags = flags;
        ols->ols_speculative = !!(enqflags & CEF_SPECULATIVE);
+       if (lock->cll_descr.cld_mode == CLM_GROUP)
+               ols->ols_flags |= LDLM_FL_ATOMIC_CB;
 
        if (ols->ols_flags & LDLM_FL_HAS_INTENT) {
                ols->ols_flags |= LDLM_FL_BLOCK_GRANTED;
@@ -1119,8 +1151,8 @@ static int mdc_io_read_ahead(const struct lu_env *env,
                ldlm_lock_decref(&lockh, dlmlock->l_req_mode);
        }
 
-       ra->cra_rpc_size = osc_cli(osc)->cl_max_pages_per_rpc;
-       ra->cra_end = CL_PAGE_EOF;
+       ra->cra_rpc_pages = osc_cli(osc)->cl_max_pages_per_rpc;
+       ra->cra_end_idx = CL_PAGE_EOF;
        ra->cra_release = osc_read_ahead_release;
        ra->cra_cbdata = dlmlock;
 
@@ -1247,8 +1279,7 @@ static int mdc_io_data_version_start(const struct lu_env *env,
        ptlrpc_request_set_replen(req);
 
        req->rq_interpret_reply = mdc_data_version_interpret;
-       CLASSERT(sizeof(*dva) <= sizeof(req->rq_async_args));
-       dva = ptlrpc_req_async_args(req);
+       dva = ptlrpc_req_async_args(dva, req);
        dva->dva_oio = oio;
 
        ptlrpcd_add_req(req);
@@ -1286,13 +1317,13 @@ static void mdc_io_data_version_end(const struct lu_env *env,
 static struct cl_io_operations mdc_io_ops = {
        .op = {
                [CIT_READ] = {
-                       .cio_iter_init = osc_io_iter_init,
-                       .cio_iter_fini = osc_io_iter_fini,
+                       .cio_iter_init = osc_io_rw_iter_init,
+                       .cio_iter_fini = osc_io_rw_iter_fini,
                        .cio_start     = osc_io_read_start,
                },
                [CIT_WRITE] = {
-                       .cio_iter_init = osc_io_write_iter_init,
-                       .cio_iter_fini = osc_io_write_iter_fini,
+                       .cio_iter_init = osc_io_rw_iter_init,
+                       .cio_iter_fini = osc_io_rw_iter_fini,
                        .cio_start     = osc_io_write_start,
                        .cio_end       = osc_io_end,
                },
@@ -1316,6 +1347,10 @@ static struct cl_io_operations mdc_io_ops = {
                        .cio_start = mdc_io_fsync_start,
                        .cio_end   = osc_io_fsync_end,
                },
+               [CIT_LSEEK] = {
+                       .cio_start  = osc_io_lseek_start,
+                       .cio_end    = osc_io_lseek_end,
+               },
        },
        .cio_read_ahead   = mdc_io_read_ahead,
        .cio_submit       = osc_io_submit,
@@ -1391,11 +1426,35 @@ static int mdc_attr_get(const struct lu_env *env, struct cl_object *obj,
 
 static int mdc_object_ast_clear(struct ldlm_lock *lock, void *data)
 {
+       struct osc_object *osc = (struct osc_object *)data;
+       struct ost_lvb *lvb = &lock->l_ost_lvb;
+       struct lov_oinfo *oinfo;
        ENTRY;
 
-       if (lock->l_ast_data == data)
+       if (lock->l_ast_data == data) {
                lock->l_ast_data = NULL;
-       ldlm_set_kms_ignore(lock);
+
+               LASSERT(osc != NULL);
+               LASSERT(osc->oo_oinfo != NULL);
+               LASSERT(lvb != NULL);
+
+               /* Updates lvb in lock by the cached oinfo */
+               oinfo = osc->oo_oinfo;
+
+               LDLM_DEBUG(lock, "update lock size %llu blocks %llu [cma]time: "
+                          "%llu %llu %llu by oinfo size %llu blocks %llu "
+                          "[cma]time %llu %llu %llu", lvb->lvb_size,
+                          lvb->lvb_blocks, lvb->lvb_ctime, lvb->lvb_mtime,
+                          lvb->lvb_atime, oinfo->loi_lvb.lvb_size,
+                          oinfo->loi_lvb.lvb_blocks, oinfo->loi_lvb.lvb_ctime,
+                          oinfo->loi_lvb.lvb_mtime, oinfo->loi_lvb.lvb_atime);
+               LASSERT(oinfo->loi_lvb.lvb_size >= oinfo->loi_kms);
+
+               cl_object_attr_lock(&osc->oo_cl);
+               memcpy(lvb, &oinfo->loi_lvb, sizeof(oinfo->loi_lvb));
+               cl_object_attr_unlock(&osc->oo_cl);
+               ldlm_clear_lvb_cached(lock);
+       }
        RETURN(LDLM_ITER_CONTINUE);
 }
 
@@ -1412,6 +1471,17 @@ int mdc_object_prune(const struct lu_env *env, struct cl_object *obj)
        return 0;
 }
 
+static int mdc_object_flush(const struct lu_env *env, struct cl_object *obj,
+                           struct ldlm_lock *lock)
+{
+       /* if lock cancel is initiated from llite then it is combined
+        * lock with DOM bit and it may have no l_ast_data initialized yet,
+        * so init it here with given osc_object.
+        */
+       mdc_set_dom_lock_data(lock, cl2osc(obj));
+       RETURN(mdc_dlm_canceling(env, lock));
+}
+
 static const struct cl_object_operations mdc_ops = {
        .coo_page_init = osc_page_init,
        .coo_lock_init = mdc_lock_init,
@@ -1421,6 +1491,7 @@ static const struct cl_object_operations mdc_ops = {
        .coo_glimpse = osc_object_glimpse,
        .coo_req_attr_set = mdc_req_attr_set,
        .coo_prune = mdc_object_prune,
+       .coo_object_flush = mdc_object_flush
 };
 
 static const struct osc_object_operations mdc_object_ops = {