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LU-3222 ofd: use of ofd_XXX helpers
[fs/lustre-release.git] / lustre / ofd / ofd_io.c
index ea54334..fcb1c8d 100644 (file)
@@ -27,7 +27,7 @@
  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2013, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
 
 #include "ofd_internal.h"
 
+struct ofd_inconsistency_item {
+       struct list_head         oii_list;
+       struct ofd_object       *oii_obj;
+       struct lu_fid            oii_pfid;
+};
+
+static void ofd_inconsistency_verify_one(const struct lu_env *env,
+                                        struct ofd_device *ofd,
+                                        struct ofd_inconsistency_item *oii,
+                                        struct lfsck_request *lr)
+{
+       struct ofd_object       *fo     = oii->oii_obj;
+       struct lu_fid           *pfid   = &fo->ofo_pfid;
+       int                      rc;
+
+       LASSERT(fo->ofo_pfid_checking);
+       LASSERT(!fo->ofo_pfid_verified);
+
+       lr->lr_fid = fo->ofo_header.loh_fid; /* OST-object itself FID. */
+       lr->lr_fid2 = oii->oii_pfid; /* client given PFID. */
+       lr->lr_fid3 = *pfid; /* OST local stored PFID. */
+
+       rc = lfsck_in_notify(env, ofd->ofd_osd, lr);
+       ofd_write_lock(env, fo);
+       switch (lr->lr_status) {
+       case LPVS_INIT:
+               LASSERT(rc <= 0);
+
+               if (rc < 0)
+                       CDEBUG(D_LFSCK, "%s: fail to verify OST local stored "
+                              "PFID xattr for "DFID", the client given PFID "
+                              DFID", OST local stored PFID "DFID": rc = %d\n",
+                              ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+                              PFID(&oii->oii_pfid), PFID(pfid), rc);
+               else
+                       fo->ofo_pfid_verified = 1;
+               break;
+       case LPVS_INCONSISTENT:
+               LASSERT(rc != 0);
+
+               ofd->ofd_inconsistency_self_detected++;
+               if (rc < 0)
+                       CDEBUG(D_LFSCK, "%s: fail to verify the client given "
+                              "PFID for "DFID", the client given PFID "DFID
+                              ", local stored PFID "DFID": rc = %d\n",
+                              ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+                              PFID(&oii->oii_pfid), PFID(pfid), rc);
+               else
+                       CDEBUG(D_LFSCK, "%s: both the client given PFID and "
+                              "the OST local stored PFID are stale for the "
+                              "OST-object "DFID", client given PFID is "DFID
+                              ", local stored PFID is "DFID"\n",
+                              ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+                              PFID(&oii->oii_pfid), PFID(pfid));
+               break;
+       case LPVS_INCONSISTENT_TOFIX:
+               ofd->ofd_inconsistency_self_detected++;
+               if (rc == 0) {
+                       ofd->ofd_inconsistency_self_repaired++;
+                       CDEBUG(D_LFSCK, "%s: fixed the staled OST PFID xattr "
+                              "for "DFID", with the client given PFID "DFID
+                              ", the old stored PFID "DFID"\n",
+                              ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+                              PFID(&oii->oii_pfid), PFID(pfid));
+               } else {
+                       CDEBUG(D_LFSCK, "%s: fail to fix the OST PFID xattr "
+                              "for "DFID", client given PFID "DFID", local "
+                              "stored PFID "DFID": rc = %d\n",
+                              ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+                              PFID(&oii->oii_pfid), PFID(pfid), rc);
+               }
+               *pfid = oii->oii_pfid;
+               fo->ofo_pfid_verified = 1;
+               break;
+       default:
+               break;
+       }
+       fo->ofo_pfid_checking = 0;
+       ofd_write_unlock(env, fo);
+
+       lu_object_put(env, &fo->ofo_obj.do_lu);
+       OBD_FREE_PTR(oii);
+}
+
+static int ofd_inconsistency_verification_main(void *args)
+{
+       struct lu_env                  env;
+       struct ofd_device             *ofd    = args;
+       struct ptlrpc_thread          *thread = &ofd->ofd_inconsistency_thread;
+       struct ofd_inconsistency_item *oii;
+       struct lfsck_request          *lr     = NULL;
+       struct l_wait_info             lwi    = { 0 };
+       int                            rc;
+       ENTRY;
+
+       rc = lu_env_init(&env, LCT_DT_THREAD);
+       spin_lock(&ofd->ofd_inconsistency_lock);
+       thread_set_flags(thread, rc != 0 ? SVC_STOPPED : SVC_RUNNING);
+       wake_up_all(&thread->t_ctl_waitq);
+       spin_unlock(&ofd->ofd_inconsistency_lock);
+       if (rc != 0)
+               RETURN(rc);
+
+       OBD_ALLOC_PTR(lr);
+       if (unlikely(lr == NULL))
+               GOTO(out, rc = -ENOMEM);
+
+       lr->lr_event = LE_PAIRS_VERIFY;
+       lr->lr_active = LT_LAYOUT;
+
+       spin_lock(&ofd->ofd_inconsistency_lock);
+       while (1) {
+               if (unlikely(!thread_is_running(thread)))
+                       break;
+
+               while (!list_empty(&ofd->ofd_inconsistency_list)) {
+                       oii = list_entry(ofd->ofd_inconsistency_list.next,
+                                        struct ofd_inconsistency_item,
+                                        oii_list);
+                       list_del_init(&oii->oii_list);
+                       spin_unlock(&ofd->ofd_inconsistency_lock);
+                       ofd_inconsistency_verify_one(&env, ofd, oii, lr);
+                       spin_lock(&ofd->ofd_inconsistency_lock);
+               }
+
+               spin_unlock(&ofd->ofd_inconsistency_lock);
+               l_wait_event(thread->t_ctl_waitq,
+                            !list_empty(&ofd->ofd_inconsistency_list) ||
+                            !thread_is_running(thread),
+                            &lwi);
+               spin_lock(&ofd->ofd_inconsistency_lock);
+       }
+
+       while (!list_empty(&ofd->ofd_inconsistency_list)) {
+               struct ofd_object *fo;
+
+               oii = list_entry(ofd->ofd_inconsistency_list.next,
+                                struct ofd_inconsistency_item,
+                                oii_list);
+               list_del_init(&oii->oii_list);
+               fo = oii->oii_obj;
+               spin_unlock(&ofd->ofd_inconsistency_lock);
+
+               ofd_write_lock(&env, fo);
+               fo->ofo_pfid_checking = 0;
+               ofd_write_unlock(&env, fo);
+
+               lu_object_put(&env, &fo->ofo_obj.do_lu);
+               OBD_FREE_PTR(oii);
+               spin_lock(&ofd->ofd_inconsistency_lock);
+       }
+
+       OBD_FREE_PTR(lr);
+
+       GOTO(out, rc = 0);
+
+out:
+       thread_set_flags(thread, SVC_STOPPED);
+       wake_up_all(&thread->t_ctl_waitq);
+       spin_unlock(&ofd->ofd_inconsistency_lock);
+       lu_env_fini(&env);
+
+       return rc;
+}
+
+int ofd_start_inconsistency_verification_thread(struct ofd_device *ofd)
+{
+       struct ptlrpc_thread    *thread = &ofd->ofd_inconsistency_thread;
+       struct l_wait_info       lwi    = { 0 };
+       struct task_struct      *task;
+       int                      rc;
+
+       spin_lock(&ofd->ofd_inconsistency_lock);
+       if (unlikely(thread_is_running(thread))) {
+               spin_unlock(&ofd->ofd_inconsistency_lock);
+
+               return -EALREADY;
+       }
+
+       thread_set_flags(thread, 0);
+       spin_unlock(&ofd->ofd_inconsistency_lock);
+       task = kthread_run(ofd_inconsistency_verification_main, ofd,
+                          "inconsistency_verification");
+       if (IS_ERR(task)) {
+               rc = PTR_ERR(task);
+               CERROR("%s: cannot start self_repair thread: rc = %d\n",
+                      ofd_name(ofd), rc);
+       } else {
+               rc = 0;
+               l_wait_event(thread->t_ctl_waitq,
+                            thread_is_running(thread) ||
+                            thread_is_stopped(thread),
+                            &lwi);
+       }
+
+       return rc;
+}
+
+int ofd_stop_inconsistency_verification_thread(struct ofd_device *ofd)
+{
+       struct ptlrpc_thread    *thread = &ofd->ofd_inconsistency_thread;
+       struct l_wait_info       lwi    = { 0 };
+
+       spin_lock(&ofd->ofd_inconsistency_lock);
+       if (thread_is_init(thread) || thread_is_stopped(thread)) {
+               spin_unlock(&ofd->ofd_inconsistency_lock);
+
+               return -EALREADY;
+       }
+
+       thread_set_flags(thread, SVC_STOPPING);
+       spin_unlock(&ofd->ofd_inconsistency_lock);
+       wake_up_all(&thread->t_ctl_waitq);
+       l_wait_event(thread->t_ctl_waitq,
+                    thread_is_stopped(thread),
+                    &lwi);
+
+       return 0;
+}
+
+static void ofd_add_inconsistency_item(const struct lu_env *env,
+                                      struct ofd_object *fo, struct obdo *oa)
+{
+       struct ofd_device               *ofd    = ofd_obj2dev(fo);
+       struct ofd_inconsistency_item   *oii;
+       bool                             wakeup = false;
+
+       OBD_ALLOC_PTR(oii);
+       if (oii == NULL) {
+               CERROR("%s: cannot alloc memory for verify OST-object "
+                      "consistency for "DFID", client given PFID "DFID
+                      ", local stored PFID "DFID"\n",
+                      ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+                      oa->o_parent_seq, oa->o_parent_oid, oa->o_stripe_idx,
+                      PFID(&fo->ofo_pfid));
+
+               return;
+       }
+
+       INIT_LIST_HEAD(&oii->oii_list);
+       lu_object_get(&fo->ofo_obj.do_lu);
+       oii->oii_obj = fo;
+       oii->oii_pfid.f_seq = oa->o_parent_seq;
+       oii->oii_pfid.f_oid = oa->o_parent_oid;
+       oii->oii_pfid.f_stripe_idx = oa->o_stripe_idx;
+
+       spin_lock(&ofd->ofd_inconsistency_lock);
+       if (fo->ofo_pfid_checking || fo->ofo_pfid_verified) {
+               spin_unlock(&ofd->ofd_inconsistency_lock);
+               OBD_FREE_PTR(oii);
+
+               return;
+       }
+
+       fo->ofo_pfid_checking = 1;
+       if (list_empty(&ofd->ofd_inconsistency_list))
+               wakeup = true;
+       list_add_tail(&oii->oii_list, &ofd->ofd_inconsistency_list);
+       spin_unlock(&ofd->ofd_inconsistency_lock);
+       if (wakeup)
+               wake_up_all(&ofd->ofd_inconsistency_thread.t_ctl_waitq);
+
+       /* XXX: When the found inconsistency exceeds some threshold,
+        *      we can trigger the LFSCK to scan part of the system
+        *      or the whole system, which depends on how to define
+        *      the threshold, a simple way maybe like that: define
+        *      the absolute value of how many inconsisteny allowed
+        *      to be repaired via self detect/repair mechanism, if
+        *      exceeded, then trigger the LFSCK to scan the layout
+        *      inconsistency within the whole system. */
+}
+
+int ofd_verify_ff(const struct lu_env *env, struct ofd_object *fo,
+                 struct obdo *oa)
+{
+       struct lu_fid   *pfid   = &fo->ofo_pfid;
+       int              rc     = 0;
+       ENTRY;
+
+       if (fid_is_sane(pfid)) {
+               if (likely(oa->o_parent_seq == pfid->f_seq &&
+                          oa->o_parent_oid == pfid->f_oid &&
+                          oa->o_stripe_idx == pfid->f_stripe_idx))
+                       RETURN(0);
+
+               if (fo->ofo_pfid_verified)
+                       RETURN(-EPERM);
+       }
+
+       /* The OST-object may be inconsistent, and we need further verification.
+        * To avoid block the RPC service thread, return -EINPROGRESS to client
+        * and make it retry later. */
+       if (fo->ofo_pfid_checking)
+               RETURN(-EINPROGRESS);
+
+       rc = ofd_object_ff_load(env, fo);
+       if (rc == -ENODATA)
+               RETURN(0);
+
+       if (rc < 0)
+               RETURN(rc);
+
+       if (likely(oa->o_parent_seq == pfid->f_seq &&
+                  oa->o_parent_oid == pfid->f_oid &&
+                  oa->o_stripe_idx == pfid->f_stripe_idx))
+               RETURN(0);
+
+       /* Push it to the dedicated thread for further verification. */
+       ofd_add_inconsistency_item(env, fo, oa);
+
+       RETURN(-EINPROGRESS);
+}
+
 static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
-                          struct ofd_device *ofd, struct lu_fid *fid,
-                          struct lu_attr *la, int niocount,
+                          struct ofd_device *ofd, const struct lu_fid *fid,
+                          struct lu_attr *la, struct obdo *oa, int niocount,
                           struct niobuf_remote *rnb, int *nr_local,
-                          struct niobuf_local *lnb,
-                          struct obd_trans_info *oti)
+                          struct niobuf_local *lnb, char *jobid)
 {
        struct ofd_object       *fo;
        int                      i, j, rc, tot_bytes = 0;
@@ -64,19 +376,27 @@ static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
        if (!ofd_object_exists(fo))
                GOTO(unlock, rc = -ENOENT);
 
+       if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
+               rc = ofd_verify_ff(env, fo, oa);
+               if (rc != 0)
+                       GOTO(unlock, rc);
+       }
+
        /* parse remote buffers to local buffers and prepare the latter */
+       *nr_local = 0;
        for (i = 0, j = 0; i < niocount; i++) {
                rc = dt_bufs_get(env, ofd_object_child(fo), rnb + i,
                                 lnb + j, 0, ofd_object_capa(env, fo));
-               LASSERT(rc > 0);
+               if (unlikely(rc < 0))
+                       GOTO(buf_put, rc);
                LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
                /* correct index for local buffers to continue with */
                j += rc;
+               *nr_local += rc;
                LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
                tot_bytes += rnb[i].rnb_len;
        }
 
-       *nr_local = j;
        LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
        rc = dt_attr_get(env, ofd_object_child(fo), la,
                         ofd_object_capa(env, fo));
@@ -86,10 +406,8 @@ static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
        rc = dt_read_prep(env, ofd_object_child(fo), lnb, *nr_local);
        if (unlikely(rc))
                GOTO(buf_put, rc);
-       lprocfs_counter_add(ofd_obd(ofd)->obd_stats,
-                           LPROC_OFD_READ_BYTES, tot_bytes);
-       ofd_counter_incr(exp, LPROC_OFD_STATS_READ,
-                        oti->oti_jobid, tot_bytes);
+
+       ofd_counter_incr(exp, LPROC_OFD_STATS_READ, jobid, tot_bytes);
        RETURN(0);
 
 buf_put:
@@ -101,12 +419,11 @@ unlock:
 }
 
 static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
-                           struct ofd_device *ofd, struct lu_fid *fid,
+                           struct ofd_device *ofd, const struct lu_fid *fid,
                            struct lu_attr *la, struct obdo *oa,
                            int objcount, struct obd_ioobj *obj,
                            struct niobuf_remote *rnb, int *nr_local,
-                           struct niobuf_local *lnb,
-                           struct obd_trans_info *oti)
+                           struct niobuf_local *lnb, char *jobid)
 {
        struct ofd_object       *fo;
        int                      i, j, k, rc = 0, tot_bytes = 0;
@@ -116,86 +433,125 @@ static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
        LASSERT(objcount == 1);
 
        if (unlikely(exp->exp_obd->obd_recovering)) {
-               struct ofd_thread_info *info = ofd_info(env);
-
-               /* copied from ofd_precreate_object */
-               /* XXX this should be consolidated to use the same code
-                *     instead of a copy, due to the ongoing risk of bugs. */
-               memset(&info->fti_attr, 0, sizeof(info->fti_attr));
-               info->fti_attr.la_valid = LA_TYPE | LA_MODE;
-               info->fti_attr.la_mode = S_IFREG | S_ISUID | S_ISGID | 0666;
-               info->fti_attr.la_valid |= LA_ATIME | LA_MTIME | LA_CTIME;
-               /* Initialize a/c/m time so any client timestamp will always
-                * be newer and update the inode. ctime = 0 is also handled
-                * specially in osd_inode_setattr().  See LU-221, LU-1042 */
-               info->fti_attr.la_atime = 0;
-               info->fti_attr.la_mtime = 0;
-               info->fti_attr.la_ctime = 0;
-
-               fo = ofd_object_find_or_create(env, ofd, fid, &info->fti_attr);
-       } else {
-               fo = ofd_object_find(env, ofd, fid);
+               obd_seq seq = fid_seq(fid);
+               obd_id  oid = fid_oid(fid);
+               struct ofd_seq *oseq;
+
+               oseq = ofd_seq_load(env, ofd, seq);
+               if (IS_ERR(oseq)) {
+                       CERROR("%s: Can't find FID Sequence "LPX64": rc = %d\n",
+                              ofd_name(ofd), seq, (int)PTR_ERR(oseq));
+                       GOTO(out, rc = -EINVAL);
+               }
+
+               if (oid > ofd_seq_last_oid(oseq)) {
+                       int sync = 0;
+                       int diff;
+
+                       mutex_lock(&oseq->os_create_lock);
+                       diff = oid - ofd_seq_last_oid(oseq);
+
+                       /* Do sync create if the seq is about to used up */
+                       if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
+                               if (unlikely(oid >= IDIF_MAX_OID - 1))
+                                       sync = 1;
+                       } else if (fid_seq_is_norm(seq)) {
+                               if (unlikely(oid >=
+                                            LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
+                                       sync = 1;
+                       } else {
+                               CERROR("%s : invalid o_seq "DOSTID"\n",
+                                      ofd_name(ofd), POSTID(&oa->o_oi));
+                               mutex_unlock(&oseq->os_create_lock);
+                               ofd_seq_put(env, oseq);
+                               GOTO(out, rc = -EINVAL);
+                       }
+
+                       while (diff > 0) {
+                               obd_id next_id = ofd_seq_last_oid(oseq) + 1;
+                               int count = ofd_precreate_batch(ofd, diff);
+
+                               rc = ofd_precreate_objects(env, ofd, next_id,
+                                                          oseq, count, sync);
+                               if (rc < 0) {
+                                       mutex_unlock(&oseq->os_create_lock);
+                                       ofd_seq_put(env, oseq);
+                                       GOTO(out, rc);
+                               }
+
+                               diff -= rc;
+                       }
+
+                       mutex_unlock(&oseq->os_create_lock);
+               }
+
+               ofd_seq_put(env, oseq);
        }
 
+       fo = ofd_object_find(env, ofd, fid);
        if (IS_ERR(fo))
                GOTO(out, rc = PTR_ERR(fo));
        LASSERT(fo != NULL);
 
        ofd_read_lock(env, fo);
        if (!ofd_object_exists(fo)) {
-               CERROR("%s: BRW to missing obj "LPU64"/"LPU64"\n",
-                      exp->exp_obd->obd_name, obj->ioo_id, obj->ioo_seq);
+               CERROR("%s: BRW to missing obj "DOSTID"\n",
+                      exp->exp_obd->obd_name, POSTID(&obj->ioo_oid));
                ofd_read_unlock(env, fo);
                ofd_object_put(env, fo);
                GOTO(out, rc = -ENOENT);
        }
 
-       /* Always sync if syncjournal parameter is set */
-       oti->oti_sync_write = ofd->ofd_syncjournal;
+       if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
+               rc = ofd_verify_ff(env, fo, oa);
+               if (rc != 0) {
+                       ofd_read_unlock(env, fo);
+                       ofd_object_put(env, fo);
+                       GOTO(out, rc);
+               }
+       }
 
        /* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
         * space back if possible */
        ofd_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);
 
        /* parse remote buffers to local buffers and prepare the latter */
+       *nr_local = 0;
        for (i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
                rc = dt_bufs_get(env, ofd_object_child(fo),
                                 rnb + i, lnb + j, 1,
                                 ofd_object_capa(env, fo));
-               LASSERT(rc > 0);
+               if (unlikely(rc < 0))
+                       GOTO(err, rc);
                LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
                /* correct index for local buffers to continue with */
                for (k = 0; k < rc; k++) {
                        lnb[j+k].lnb_flags = rnb[i].rnb_flags;
                        if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
                                lnb[j+k].lnb_rc = -ENOSPC;
-                       if (!(rnb[i].rnb_flags & OBD_BRW_ASYNC))
-                               oti->oti_sync_write = 1;
+
                        /* remote client can't break through quota */
                        if (exp_connect_rmtclient(exp))
                                lnb[j+k].lnb_flags &= ~OBD_BRW_NOQUOTA;
                }
                j += rc;
+               *nr_local += rc;
                LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
                tot_bytes += rnb[i].rnb_len;
        }
-       *nr_local = j;
        LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
 
        rc = dt_write_prep(env, ofd_object_child(fo), lnb, *nr_local);
-       if (unlikely(rc != 0)) {
-               dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
-               ofd_read_unlock(env, fo);
-               /* ofd_grant_prepare_write() was called, so we must commit */
-               ofd_grant_commit(env, exp, rc);
-               GOTO(out, rc);
-       }
+       if (unlikely(rc != 0))
+               GOTO(err, rc);
 
-       lprocfs_counter_add(ofd_obd(ofd)->obd_stats,
-                           LPROC_OFD_WRITE_BYTES, tot_bytes);
-       ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE,
-                        oti->oti_jobid, tot_bytes);
+       ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE, jobid, tot_bytes);
        RETURN(0);
+err:
+       dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
+       ofd_read_unlock(env, fo);
+       /* ofd_grant_prepare_write() was called, so we must commit */
+       ofd_grant_commit(env, exp, rc);
 out:
        /* let's still process incoming grant information packed in the oa,
         * but without enforcing grant since we won't proceed with the write.
@@ -204,29 +560,46 @@ out:
        return rc;
 }
 
-int ofd_preprw(const struct lu_envenv, int cmd, struct obd_export *exp,
+int ofd_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
               struct obdo *oa, int objcount, struct obd_ioobj *obj,
               struct niobuf_remote *rnb, int *nr_local,
               struct niobuf_local *lnb, struct obd_trans_info *oti,
               struct lustre_capa *capa)
 {
+       struct tgt_session_info *tsi = tgt_ses_info(env);
        struct ofd_device       *ofd = ofd_exp(exp);
        struct ofd_thread_info  *info;
+       char                    *jobid;
+       const struct lu_fid     *fid = &oa->o_oi.oi_fid;
        int                      rc = 0;
 
-       rc = lu_env_refill((struct lu_env *)env);
-       LASSERT(rc == 0);
-       info = ofd_info_init(env, exp);
+       if (*nr_local > PTLRPC_MAX_BRW_PAGES) {
+               CERROR("%s: bulk has too many pages %d, which exceeds the"
+                      "maximum pages per RPC of %d\n",
+                      exp->exp_obd->obd_name, *nr_local, PTLRPC_MAX_BRW_PAGES);
+               RETURN(-EPROTO);
+       }
+
+       if (tgt_ses_req(tsi) == NULL) { /* echo client case */
+               LASSERT(oti != NULL);
+               info = ofd_info_init(env, exp);
+               ofd_oti2info(info, oti);
+               jobid = oti->oti_jobid;
+       } else {
+               info = tsi2ofd_info(tsi);
+               jobid = tsi->tsi_jobid;
+       }
 
        LASSERT(oa != NULL);
 
        if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT)) {
                struct ofd_seq          *oseq;
-               oseq = ofd_seq_load(env, ofd, oa->o_seq);
+
+               oseq = ofd_seq_load(env, ofd, ostid_seq(&oa->o_oi));
                if (IS_ERR(oseq)) {
-                       CERROR("%s: Can not find seq for "LPU64":"LPU64
-                              ": rc = %ld\n", ofd_name(ofd), oa->o_seq,
-                              oa->o_id, PTR_ERR(oseq));
+                       CERROR("%s: Can not find seq for "DOSTID
+                              ": rc = %ld\n", ofd_name(ofd), POSTID(&oa->o_oi),
+                              PTR_ERR(oseq));
                        RETURN(-EINVAL);
                }
 
@@ -243,24 +616,24 @@ int ofd_preprw(const struct lu_env* env, int cmd, struct obd_export *exp,
        LASSERT(objcount == 1);
        LASSERT(obj->ioo_bufcnt > 0);
 
-       fid_ostid_unpack(&info->fti_fid, &oa->o_oi, 0);
        if (cmd == OBD_BRW_WRITE) {
-               rc = ofd_auth_capa(exp, &info->fti_fid, oa->o_seq,
+               rc = ofd_auth_capa(exp, fid, ostid_seq(&oa->o_oi),
                                   capa, CAPA_OPC_OSS_WRITE);
                if (rc == 0) {
                        la_from_obdo(&info->fti_attr, oa, OBD_MD_FLGETATTR);
-                       rc = ofd_preprw_write(env, exp, ofd, &info->fti_fid,
+                       rc = ofd_preprw_write(env, exp, ofd, fid,
                                              &info->fti_attr, oa, objcount,
-                                             obj, rnb, nr_local, lnb, oti);
+                                             obj, rnb, nr_local, lnb, jobid);
                }
        } else if (cmd == OBD_BRW_READ) {
-               rc = ofd_auth_capa(exp, &info->fti_fid, oa->o_seq,
+               rc = ofd_auth_capa(exp, fid, ostid_seq(&oa->o_oi),
                                   capa, CAPA_OPC_OSS_READ);
                if (rc == 0) {
                        ofd_grant_prepare_read(env, exp, oa);
-                       rc = ofd_preprw_read(env, exp, ofd, &info->fti_fid,
-                                            &info->fti_attr, obj->ioo_bufcnt,
-                                            rnb, nr_local, lnb, oti);
+                       rc = ofd_preprw_read(env, exp, ofd, fid,
+                                            &info->fti_attr, oa,
+                                            obj->ioo_bufcnt, rnb, nr_local,
+                                            lnb, jobid);
                        obdo_from_la(oa, &info->fti_attr, LA_ATIME);
                }
        } else {
@@ -273,7 +646,7 @@ int ofd_preprw(const struct lu_env* env, int cmd, struct obd_export *exp,
 
 static int
 ofd_commitrw_read(const struct lu_env *env, struct ofd_device *ofd,
-                 struct lu_fid *fid, int objcount, int niocount,
+                 const struct lu_fid *fid, int objcount, int niocount,
                  struct niobuf_local *lnb)
 {
        struct ofd_object *fo;
@@ -323,7 +696,7 @@ ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
                GOTO(out, rc);
 
        if (ff != NULL) {
-               rc = ofd_object_ff_check(env, ofd_obj);
+               rc = ofd_object_ff_load(env, ofd_obj);
                if (rc == -ENODATA)
                        ff_needed = 1;
                else if (rc < 0)
@@ -345,6 +718,12 @@ ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
        }
 
        if (ff_needed) {
+               if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR1))
+                       ff->ff_parent.f_oid = cpu_to_le32(1UL << 31);
+               if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR2))
+                       ff->ff_parent.f_oid =
+                       cpu_to_le32(le32_to_cpu(ff->ff_parent.f_oid) - 1);
+
                info->fti_buf.lb_buf = ff;
                info->fti_buf.lb_len = sizeof(*ff);
                rc = dt_declare_xattr_set(env, dt_obj, &info->fti_buf,
@@ -369,13 +748,25 @@ ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
 
        /* set filter fid EA */
        if (ff_needed) {
+               if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NOPFID))
+                       GOTO(out_tx, rc);
+
                rc = dt_xattr_set(env, dt_obj, &info->fti_buf, XATTR_NAME_FID,
                                  0, th, BYPASS_CAPA);
-               if (rc)
-                       GOTO(out_tx, rc);
+               if (rc == 0) {
+                       ofd_obj->ofo_pfid.f_seq = le64_to_cpu(ff->ff_parent.f_seq);
+                       ofd_obj->ofo_pfid.f_oid = le32_to_cpu(ff->ff_parent.f_oid);
+                       /* Currently, the filter_fid::ff_parent::f_ver is not
+                        * the real parent MDT-object's FID::f_ver, instead it
+                        * is the OST-object index in its parent MDT-object's
+                        * layout EA. */
+                       ofd_obj->ofo_pfid.f_stripe_idx =
+                                       le32_to_cpu(ff->ff_parent.f_stripe_idx);
+               }
        }
 
-       EXIT;
+       GOTO(out_tx, rc);
+
 out_tx:
        dt_trans_stop(env, ofd->ofd_osd, th);
 out:
@@ -383,12 +774,57 @@ out:
        return rc;
 }
 
+struct ofd_soft_sync_callback {
+       struct dt_txn_commit_cb  ossc_cb;
+       struct obd_export       *ossc_exp;
+};
+
+static void ofd_cb_soft_sync(struct lu_env *env, struct thandle *th,
+                            struct dt_txn_commit_cb *cb, int err)
+{
+       struct ofd_soft_sync_callback   *ossc;
+
+       ossc = container_of(cb, struct ofd_soft_sync_callback, ossc_cb);
+
+       CDEBUG(D_INODE, "export %p soft sync count is reset\n", ossc->ossc_exp);
+       atomic_set(&ossc->ossc_exp->exp_filter_data.fed_soft_sync_count, 0);
+
+       class_export_cb_put(ossc->ossc_exp);
+       OBD_FREE_PTR(ossc);
+}
+
+static int ofd_soft_sync_cb_add(struct thandle *th, struct obd_export *exp)
+{
+       struct ofd_soft_sync_callback           *ossc;
+       struct dt_txn_commit_cb                 *dcb;
+       int                                      rc;
+
+       OBD_ALLOC_PTR(ossc);
+       if (ossc == NULL)
+               return -ENOMEM;
+
+       ossc->ossc_exp = class_export_cb_get(exp);
+
+       dcb = &ossc->ossc_cb;
+       dcb->dcb_func = ofd_cb_soft_sync;
+       CFS_INIT_LIST_HEAD(&dcb->dcb_linkage);
+       strncpy(dcb->dcb_name, "ofd_cb_soft_sync", MAX_COMMIT_CB_STR_LEN);
+       dcb->dcb_name[MAX_COMMIT_CB_STR_LEN - 1] = '\0';
+
+       rc = dt_trans_cb_add(th, dcb);
+       if (rc) {
+               class_export_cb_put(exp);
+               OBD_FREE_PTR(ossc);
+       }
+
+       return rc;
+}
+
 static int
-ofd_commitrw_write(const struct lu_env *env, struct ofd_device *ofd,
-                  struct lu_fid *fid, struct lu_attr *la,
-                  struct filter_fid *ff, int objcount,
-                  int niocount, struct niobuf_local *lnb,
-                  struct obd_trans_info *oti, int old_rc)
+ofd_commitrw_write(const struct lu_env *env, struct obd_export *exp,
+                  struct ofd_device *ofd, const struct lu_fid *fid,
+                  struct lu_attr *la, struct filter_fid *ff, int objcount,
+                  int niocount, struct niobuf_local *lnb, int old_rc)
 {
        struct ofd_thread_info  *info = ofd_info(env);
        struct ofd_object       *fo;
@@ -396,6 +832,10 @@ ofd_commitrw_write(const struct lu_env *env, struct ofd_device *ofd,
        struct thandle          *th;
        int                      rc = 0;
        int                      retries = 0;
+       int                      i;
+       struct filter_export_data *fed = &exp->exp_filter_data;
+       bool                     soft_sync = false;
+       bool                     cb_registered = false;
 
        ENTRY;
 
@@ -428,7 +868,17 @@ retry:
        if (IS_ERR(th))
                GOTO(out, rc = PTR_ERR(th));
 
-       th->th_sync |= oti->oti_sync_write;
+       th->th_sync |= ofd->ofd_syncjournal;
+       if (th->th_sync == 0) {
+               for (i = 0; i < niocount; i++) {
+                       if (!(lnb[i].lnb_flags & OBD_BRW_ASYNC)) {
+                               th->th_sync = 1;
+                               break;
+                       }
+                       if (lnb[i].lnb_flags & OBD_BRW_SOFT_SYNC)
+                               soft_sync = true;
+               }
+       }
 
        if (OBD_FAIL_CHECK(OBD_FAIL_OST_DQACQ_NET))
                GOTO(out_stop, rc = -EINPROGRESS);
@@ -467,6 +917,12 @@ out_stop:
        if (rc == -ENOSPC)
                th->th_sync = 1;
 
+       /* do this before trans stop in case commit has finished */
+       if (!th->th_sync && soft_sync && !cb_registered) {
+               ofd_soft_sync_cb_add(th, exp);
+               cb_registered = true;
+       }
+
        ofd_trans_stop(env, ofd, th, rc);
        if (rc == -ENOSPC && retries++ < 3) {
                CDEBUG(D_INODE, "retry after force commit, retries:%d\n",
@@ -474,6 +930,13 @@ out_stop:
                goto retry;
        }
 
+       if (!soft_sync)
+               /* reset fed_soft_sync_count upon non-SOFT_SYNC RPC */
+               atomic_set(&fed->fed_soft_sync_count, 0);
+       else if (atomic_inc_return(&fed->fed_soft_sync_count) ==
+                ofd->ofd_soft_sync_limit)
+               dt_commit_async(env, ofd->ofd_osd);
+
 out:
        dt_bufs_put(env, o, lnb, niocount);
        ofd_read_unlock(env, fo);
@@ -490,19 +953,16 @@ int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
                 struct niobuf_local *lnb, struct obd_trans_info *oti,
                 int old_rc)
 {
-       struct ofd_thread_info  *info;
+       struct ofd_thread_info  *info = ofd_info(env);
        struct ofd_mod_data     *fmd;
        __u64                    valid;
        struct ofd_device       *ofd = ofd_exp(exp);
        struct filter_fid       *ff = NULL;
+       const struct lu_fid     *fid = &oa->o_oi.oi_fid;
        int                      rc = 0;
 
-       info = ofd_info(env);
-       ofd_oti2info(info, oti);
-
        LASSERT(npages > 0);
 
-       fid_ostid_unpack(&info->fti_fid, &oa->o_oi, 0);
        if (cmd == OBD_BRW_WRITE) {
                /* Don't update timestamps if this write is older than a
                 * setattr which modifies the timestamps. b=10150 */
@@ -512,7 +972,7 @@ int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
                 * doesn't already exist so we can store the reservation handle
                 * there. */
                valid = OBD_MD_FLUID | OBD_MD_FLGID;
-               fmd = ofd_fmd_find(exp, &info->fti_fid);
+               fmd = ofd_fmd_find(exp, fid);
                if (!fmd || fmd->fmd_mactime_xid < info->fti_xid)
                        valid |= OBD_MD_FLATIME | OBD_MD_FLMTIME |
                                 OBD_MD_FLCTIME;
@@ -524,9 +984,8 @@ int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
                        ofd_prepare_fidea(ff, oa);
                }
 
-               rc = ofd_commitrw_write(env, ofd, &info->fti_fid,
-                                       &info->fti_attr, ff, objcount, npages,
-                                       lnb, oti, old_rc);
+               rc = ofd_commitrw_write(env, exp, ofd, fid, &info->fti_attr,
+                                       ff, objcount, npages, lnb, old_rc);
                if (rc == 0)
                        obdo_from_la(oa, &info->fti_attr,
                                     OFD_VALID_FLAGS | LA_GID | LA_UID);
@@ -563,7 +1022,7 @@ int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
                if (oa && ns && ns->ns_lvbo && ns->ns_lvbo->lvbo_update) {
                         struct ldlm_resource *rs = NULL;
 
-                       ofd_build_resid(&info->fti_fid, &info->fti_resid);
+                       ost_fid_build_resid(fid, &info->fti_resid);
                        rs = ldlm_resource_get(ns, NULL, &info->fti_resid,
                                               LDLM_EXTENT, 0);
                        if (rs != NULL) {
@@ -571,8 +1030,8 @@ int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
                                ldlm_resource_putref(rs);
                        }
                }
-               rc = ofd_commitrw_read(env, ofd, &info->fti_fid, objcount,
-                                         npages, lnb);
+               rc = ofd_commitrw_read(env, ofd, fid, objcount,
+                                      npages, lnb);
                if (old_rc)
                        rc = old_rc;
        } else {
@@ -580,6 +1039,7 @@ int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
                rc = -EPROTO;
        }
 
-       ofd_info2oti(info, oti);
+       if (oti != NULL)
+               ofd_info2oti(info, oti);
        RETURN(rc);
 }