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LU-7592 osd-ldiskfs: increase supported ldiskfs fs size limit
[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c
index facf412..316429b 100644 (file)
@@ -60,6 +60,7 @@
 
 #include <ldiskfs/ldiskfs.h>
 #include <ldiskfs/xattr.h>
+#include <ldiskfs/ldiskfs_extents.h>
 #undef ENTRY
 /*
  * struct OBD_{ALLOC,FREE}*()
 #include <lustre_linkea.h>
 
 int ldiskfs_pdo = 1;
-CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
-                "ldiskfs with parallel directory operations");
+module_param(ldiskfs_pdo, int, 0644);
+MODULE_PARM_DESC(ldiskfs_pdo, "ldiskfs with parallel directory operations");
 
 int ldiskfs_track_declares_assert;
-CFS_MODULE_PARM(ldiskfs_track_declares_assert, "i", int, 0644,
-               "LBUG during tracking of declares");
+module_param(ldiskfs_track_declares_assert, int, 0644);
+MODULE_PARM_DESC(ldiskfs_track_declares_assert, "LBUG during tracking of declares");
 
 /* Slab to allocate dynlocks */
 struct kmem_cache *dynlock_cachep;
@@ -175,6 +176,153 @@ static int osd_root_get(const struct lu_env *env,
 }
 
 /*
+ * the following set of functions are used to maintain per-thread
+ * cache of FID->ino mapping. this mechanism is needed to resolve
+ * FID to inode at dt_insert() which in turn stores ino in the
+ * directory entries to keep ldiskfs compatible with ext[34].
+ * due to locking-originated restrictions we can't lookup ino
+ * using LU cache (deadlock is possible). lookup using OI is quite
+ * expensive. so instead we maintain this cache and methods like
+ * dt_create() fill it. so in the majority of cases dt_insert() is
+ * able to find needed mapping in lockless manner.
+ */
+static struct osd_idmap_cache *
+osd_idc_find(const struct lu_env *env, struct osd_device *osd,
+            const struct lu_fid *fid)
+{
+       struct osd_thread_info  *oti   = osd_oti_get(env);
+       struct osd_idmap_cache  *idc    = oti->oti_ins_cache;
+       int i;
+       for (i = 0; i < oti->oti_ins_cache_used; i++) {
+               if (!lu_fid_eq(&idc[i].oic_fid, fid))
+                       continue;
+               if (idc[i].oic_dev != osd)
+                       continue;
+
+               return idc + i;
+       }
+
+       return NULL;
+}
+
+static struct osd_idmap_cache *
+osd_idc_add(const struct lu_env *env, struct osd_device *osd,
+           const struct lu_fid *fid)
+{
+       struct osd_thread_info  *oti   = osd_oti_get(env);
+       struct osd_idmap_cache  *idc;
+       int i;
+
+       if (unlikely(oti->oti_ins_cache_used >= oti->oti_ins_cache_size)) {
+               i = oti->oti_ins_cache_size * 2;
+               if (i == 0)
+                       i = OSD_INS_CACHE_SIZE;
+               OBD_ALLOC(idc, sizeof(*idc) * i);
+               if (idc == NULL)
+                       return ERR_PTR(-ENOMEM);
+               if (oti->oti_ins_cache != NULL) {
+                       memcpy(idc, oti->oti_ins_cache,
+                              oti->oti_ins_cache_used * sizeof(*idc));
+                       OBD_FREE(oti->oti_ins_cache,
+                                oti->oti_ins_cache_used * sizeof(*idc));
+               }
+               oti->oti_ins_cache = idc;
+               oti->oti_ins_cache_size = i;
+       }
+
+       idc = oti->oti_ins_cache + oti->oti_ins_cache_used++;
+       idc->oic_fid = *fid;
+       idc->oic_dev = osd;
+       idc->oic_lid.oii_ino = 0;
+       idc->oic_lid.oii_gen = 0;
+       idc->oic_remote = 0;
+
+       return idc;
+}
+
+/*
+ * lookup mapping for the given fid in the cache, initialize a
+ * new one if not found. the initialization checks whether the
+ * object is local or remote. for local objects, OI is used to
+ * learn ino/generation. the function is used when the caller
+ * has no information about the object, e.g. at dt_insert().
+ */
+static struct osd_idmap_cache *
+osd_idc_find_or_init(const struct lu_env *env, struct osd_device *osd,
+                    const struct lu_fid *fid)
+{
+       struct osd_idmap_cache *idc;
+       int rc;
+
+       idc = osd_idc_find(env, osd, fid);
+       LASSERT(!IS_ERR(idc));
+       if (idc != NULL)
+               return idc;
+
+       /* new mapping is needed */
+       idc = osd_idc_add(env, osd, fid);
+       if (IS_ERR(idc))
+               return idc;
+
+       /* initialize it */
+       rc = osd_remote_fid(env, osd, fid);
+       if (unlikely(rc < 0))
+               return ERR_PTR(rc);
+
+       if (rc == 0) {
+               /* the object is local, lookup in OI */
+               /* XXX: probably cheaper to lookup in LU first? */
+               rc = osd_oi_lookup(osd_oti_get(env), osd, fid,
+                                  &idc->oic_lid, 0);
+               if (unlikely(rc < 0)) {
+                       CERROR("can't lookup: rc = %d\n", rc);
+                       return ERR_PTR(rc);
+               }
+       } else {
+               /* the object is remote */
+               idc->oic_remote = 1;
+       }
+
+       return idc;
+}
+
+/*
+ * lookup mapping for given FID and fill it from the given object.
+ * the object is lolcal by definition.
+ */
+static int osd_idc_find_and_init(const struct lu_env *env,
+                                struct osd_device *osd,
+                                struct osd_object *obj)
+{
+       const struct lu_fid     *fid = lu_object_fid(&obj->oo_dt.do_lu);
+       struct osd_idmap_cache  *idc;
+
+       idc = osd_idc_find(env, osd, fid);
+       LASSERT(!IS_ERR(idc));
+       if (idc != NULL) {
+               if (obj->oo_inode == NULL)
+                       return 0;
+               if (idc->oic_lid.oii_ino != obj->oo_inode->i_ino) {
+                       LASSERT(idc->oic_lid.oii_ino == 0);
+                       idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
+                       idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
+               }
+               return 0;
+       }
+
+       /* new mapping is needed */
+       idc = osd_idc_add(env, osd, fid);
+       if (IS_ERR(idc))
+               return PTR_ERR(idc);
+
+       if (obj->oo_inode != NULL) {
+               idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
+               idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
+       }
+       return 0;
+}
+
+/*
  * OSD object methods.
  */
 
@@ -285,6 +433,53 @@ struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
        return inode;
 }
 
+int osd_ldiskfs_add_entry(struct osd_thread_info *info,
+                         handle_t *handle, struct dentry *child,
+                         struct inode *inode, struct htree_lock *hlock)
+{
+       int rc, rc2;
+
+       rc = __ldiskfs_add_entry(handle, child, inode, hlock);
+       if (rc == -ENOBUFS || rc == -ENOSPC) {
+               char fidbuf[FID_LEN + 1];
+               struct lustre_mdt_attrs lma;
+               struct lu_fid fid = { };
+               char *errstr;
+               struct dentry *p_dentry = child->d_parent;
+
+               rc2 = osd_get_lma(info, p_dentry->d_inode, p_dentry,
+                                &lma);
+               if (rc2 == 0) {
+                       fid = lma.lma_self_fid;
+                       snprintf(fidbuf, sizeof(fidbuf), DFID, PFID(&fid));
+               } else if (rc2 == -ENODATA) {
+                       if (unlikely(p_dentry->d_inode ==
+                                    inode->i_sb->s_root->d_inode))
+                               lu_local_obj_fid(&fid, OSD_FS_ROOT_OID);
+                       else if (info->oti_dev && !info->oti_dev->od_is_ost &&
+                                fid_seq_is_mdt0(fid_seq(&fid)))
+                               lu_igif_build(&fid, p_dentry->d_inode->i_ino,
+                                             p_dentry->d_inode->i_generation);
+                       snprintf(fidbuf, sizeof(fidbuf), DFID, PFID(&fid));
+               } else {
+                       snprintf(fidbuf, FID_LEN, "%s", "unknown");
+               }
+
+               if (rc == -ENOSPC)
+                       errstr = "has reached";
+               else
+                       errstr = "is approaching";
+               CWARN("%.16s: directory (inode: %lu FID: %s) %s maximum entry limit\n",
+                       LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
+                       p_dentry->d_inode->i_ino, fidbuf, errstr);
+               /* ignore such error now */
+               if (rc == -ENOBUFS)
+                       rc = 0;
+       }
+       return rc;
+}
+
+
 static struct inode *
 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
             struct osd_inode_id *id, struct lu_fid *fid)
@@ -600,7 +795,7 @@ static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
        LASSERT(info);
        oic = &info->oti_cache;
 
-       if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
+       if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT))
                RETURN(-ENOENT);
 
        /* For the object is created as locking anchor, or for the object to
@@ -668,6 +863,8 @@ trigger:
                                        result = -EINPROGRESS;
                                else
                                        result = -EREMCHG;
+                       } else {
+                               result = -EREMCHG;
                        }
 
                        if (fid_is_on_ost(info, dev, fid, OI_CHECK_FLD))
@@ -817,8 +1014,22 @@ static int osd_object_init(const struct lu_env *env, struct lu_object *l,
 
        result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
        obj->oo_dt.do_body_ops = &osd_body_ops_new;
-       if (result == 0 && obj->oo_inode != NULL)
+       if (result == 0 && obj->oo_inode != NULL) {
+               struct osd_thread_info *oti = osd_oti_get(env);
+               struct lustre_mdt_attrs *lma = &oti->oti_mdt_attrs;
+
                osd_object_init0(obj);
+               result = osd_get_lma(oti, obj->oo_inode,
+                                    &oti->oti_obj_dentry, lma);
+               if (result == 0) {
+                       /* Convert LMAI flags to lustre LMA flags
+                        * and cache it to oo_lma_flags */
+                       obj->oo_lma_flags =
+                               lma_to_lustre_flags(lma->lma_incompat);
+               } else if (result == -ENODATA) {
+                       result = 0;
+               }
+       }
 
        LINVRNT(osd_invariant(obj));
        return result;
@@ -1114,16 +1325,13 @@ static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
                static unsigned long last_printed;
                static int last_credits;
 
-               CWARN("%.16s: too many transaction credits (%d > %d)\n",
-                     LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
-                     oh->ot_credits,
-                     osd_journal(dev)->j_max_transaction_buffers);
-
-               osd_trans_dump_creds(env, th);
-
+               /* don't make noise on a tiny testing systems
+                * actual credits misuse will be caught anyway */
                if (last_credits != oh->ot_credits &&
                    time_after(jiffies, last_printed +
-                              msecs_to_jiffies(60 * MSEC_PER_SEC))) {
+                              msecs_to_jiffies(60 * MSEC_PER_SEC)) &&
+                   osd_transaction_size(dev) > 512) {
+                       osd_trans_dump_creds(env, th);
                        libcfs_debug_dumpstack(NULL);
                        last_credits = oh->ot_credits;
                        last_printed = jiffies;
@@ -1216,6 +1424,9 @@ static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
 
        oh = container_of0(th, struct osd_thandle, ot_super);
 
+       /* reset OI cache for safety */
+       oti->oti_ins_cache_used = 0;
+
        remove_agents = oh->ot_remove_agents;
 
        qtrans = oh->ot_quota_trans;
@@ -1340,6 +1551,12 @@ static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
 static void osd_object_release(const struct lu_env *env,
                                struct lu_object *l)
 {
+       struct osd_object *o = osd_obj(l);
+       /* nobody should be releasing a non-destroyed object with nlink=0
+        * the API allows this, but ldiskfs doesn't like and then report
+        * this inode as deleted */
+       if (unlikely(!o->oo_destroyed && o->oo_inode && o->oo_inode->i_nlink == 0))
+               LBUG();
 }
 
 /*
@@ -1363,18 +1580,17 @@ static int osd_object_print(const struct lu_env *env, void *cookie,
                     d ? d->id_ops->id_name : "plain");
 }
 
-#define GRANT_FOR_LOCAL_OIDS 32 /* 128kB for last_rcvd, quota files, ... */
-
 /*
  * Concurrency: shouldn't matter.
  */
 int osd_statfs(const struct lu_env *env, struct dt_device *d,
                struct obd_statfs *sfs)
 {
-        struct osd_device  *osd = osd_dt_dev(d);
-        struct super_block *sb = osd_sb(osd);
-        struct kstatfs     *ksfs;
-        int result = 0;
+       struct osd_device       *osd = osd_dt_dev(d);
+       struct super_block      *sb = osd_sb(osd);
+       struct kstatfs          *ksfs;
+       __u64                    reserved;
+       int                      result = 0;
 
        if (unlikely(osd->od_mnt == NULL))
                return -EINPROGRESS;
@@ -1388,34 +1604,40 @@ int osd_statfs(const struct lu_env *env, struct dt_device *d,
                 ksfs = &osd_oti_get(env)->oti_ksfs;
         }
 
-       spin_lock(&osd->od_osfs_lock);
        result = sb->s_op->statfs(sb->s_root, ksfs);
-       if (likely(result == 0)) { /* N.B. statfs can't really fail */
-               statfs_pack(sfs, ksfs);
-               if (unlikely(sb->s_flags & MS_RDONLY))
-                       sfs->os_state = OS_STATE_READONLY;
-               if (LDISKFS_HAS_INCOMPAT_FEATURE(sb,
-                                             LDISKFS_FEATURE_INCOMPAT_EXTENTS))
-                       sfs->os_maxbytes = sb->s_maxbytes;
-               else
-                       sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
-       }
-       spin_unlock(&osd->od_osfs_lock);
+       if (result)
+               goto out;
+
+       statfs_pack(sfs, ksfs);
+       if (unlikely(sb->s_flags & MS_RDONLY))
+               sfs->os_state = OS_STATE_READONLY;
+       if (LDISKFS_HAS_INCOMPAT_FEATURE(sb,
+                                        LDISKFS_FEATURE_INCOMPAT_EXTENTS))
+               sfs->os_maxbytes = sb->s_maxbytes;
+       else
+               sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
 
-       if (unlikely(env == NULL))
-                OBD_FREE_PTR(ksfs);
+       /*
+        * Reserve some space so to avoid fragmenting the filesystem too much.
+        * Fragmentation not only impacts performance, but can also increase
+        * metadata overhead significantly, causing grant calculation to be
+        * wrong.
+        *
+        * Reserve 0.78% of total space, at least 8MB for small filesystems.
+        */
+       CLASSERT(OSD_STATFS_RESERVED > LDISKFS_MAX_BLOCK_SIZE);
+       reserved = OSD_STATFS_RESERVED >> sb->s_blocksize_bits;
+       if (likely(sfs->os_blocks >= reserved << OSD_STATFS_RESERVED_SHIFT))
+               reserved = sfs->os_blocks >> OSD_STATFS_RESERVED_SHIFT;
 
-       /* Reserve a small amount of space for local objects like last_rcvd,
-        * llog, quota files, ... */
-       if (sfs->os_bavail <= GRANT_FOR_LOCAL_OIDS) {
-               sfs->os_bavail = 0;
-       } else {
-               sfs->os_bavail -= GRANT_FOR_LOCAL_OIDS;
-               /** Take out metadata overhead for indirect blocks */
-               sfs->os_bavail -= sfs->os_bavail >> (sb->s_blocksize_bits - 3);
-       }
+       sfs->os_blocks -= reserved;
+       sfs->os_bfree  -= min(reserved, sfs->os_bfree);
+       sfs->os_bavail -= min(reserved, sfs->os_bavail);
 
-        return result;
+out:
+       if (unlikely(env == NULL))
+               OBD_FREE_PTR(ksfs);
+       return result;
 }
 
 /**
@@ -1444,21 +1666,23 @@ static void osd_conf_get(const struct lu_env *env,
          */
         param->ddp_max_name_len = LDISKFS_NAME_LEN;
         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
-       param->ddp_block_shift  = sb->s_blocksize_bits;
+       param->ddp_symlink_max  = sb->s_blocksize;
        param->ddp_mount_type     = LDD_MT_LDISKFS;
        if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EXTENTS))
                param->ddp_maxbytes = sb->s_maxbytes;
        else
                param->ddp_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
-       /* Overhead estimate should be fairly accurate, so we really take a tiny
-        * error margin which also avoids fragmenting the filesystem too much */
-       param->ddp_grant_reserved = 2; /* end up to be 1.9% after conversion */
        /* inode are statically allocated, so per-inode space consumption
         * is the space consumed by the directory entry */
        param->ddp_inodespace     = PER_OBJ_USAGE;
-       /* per-fragment overhead to be used by the client code */
-       param->ddp_grant_frag     = 6 * LDISKFS_BLOCK_SIZE(sb);
-        param->ddp_mntopts      = 0;
+       /* EXT_INIT_MAX_LEN is the theoretical maximum extent size  (32k blocks
+        * = 128MB) which is unlikely to be hit in real life. Report a smaller
+        * maximum length to not under count the actual number of extents
+        * needed for writing a file. */
+       param->ddp_max_extent_blks = EXT_INIT_MAX_LEN >> 2;
+       /* worst-case extent insertion metadata overhead */
+       param->ddp_extent_tax = 6 * LDISKFS_BLOCK_SIZE(sb);
+       param->ddp_mntopts      = 0;
         if (test_opt(sb, XATTR_USER))
                 param->ddp_mntopts |= MNTOPT_USERXATTR;
         if (test_opt(sb, POSIX_ACL))
@@ -1703,7 +1927,6 @@ static struct timespec *osd_inode_time(const struct lu_env *env,
        return t;
 }
 
-
 static void osd_inode_getattr(const struct lu_env *env,
                              struct inode *inode, struct lu_attr *attr)
 {
@@ -1720,7 +1943,7 @@ static void osd_inode_getattr(const struct lu_env *env,
        attr->la_blocks  = inode->i_blocks;
        attr->la_uid     = i_uid_read(inode);
        attr->la_gid     = i_gid_read(inode);
-       attr->la_flags   = LDISKFS_I(inode)->i_flags;
+       attr->la_flags   = ll_inode_to_ext_flags(inode->i_flags);
        attr->la_nlink   = inode->i_nlink;
        attr->la_rdev    = inode->i_rdev;
        attr->la_blksize = 1 << inode->i_blkbits;
@@ -1733,7 +1956,9 @@ static int osd_attr_get(const struct lu_env *env,
 {
        struct osd_object *obj = osd_dt_obj(dt);
 
-       if (!dt_object_exists(dt))
+       if (unlikely(!dt_object_exists(dt)))
+               return -ENOENT;
+       if (unlikely(obj->oo_destroyed))
                return -ENOENT;
 
        LASSERT(!dt_object_remote(dt));
@@ -1741,7 +1966,10 @@ static int osd_attr_get(const struct lu_env *env,
 
        spin_lock(&obj->oo_guard);
        osd_inode_getattr(env, obj->oo_inode, attr);
+       if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL)
+               attr->la_flags |= LUSTRE_ORPHAN_FL;
        spin_unlock(&obj->oo_guard);
+
        return 0;
 }
 
@@ -1773,6 +2001,9 @@ static int osd_declare_attr_set(const struct lu_env *env,
        osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
                             osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
 
+       osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
+                            osd_dto_credits_noquota[DTO_XATTR_SET]);
+
        if (attr == NULL || obj->oo_inode == NULL)
                RETURN(rc);
 
@@ -2017,10 +2248,41 @@ static int osd_attr_set(const struct lu_env *env,
        spin_lock(&obj->oo_guard);
        rc = osd_inode_setattr(env, inode, attr);
        spin_unlock(&obj->oo_guard);
+       if (rc != 0)
+               GOTO(out, rc);
 
-        if (!rc)
-               ll_dirty_inode(inode, I_DIRTY_DATASYNC);
+       ll_dirty_inode(inode, I_DIRTY_DATASYNC);
+
+       if (!(attr->la_valid & LA_FLAGS))
+               GOTO(out, rc);
+
+       /* Let's check if there are extra flags need to be set into LMA */
+       if (attr->la_flags & LUSTRE_LMA_FL_MASKS) {
+               struct osd_thread_info *info = osd_oti_get(env);
+               struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
+
+               rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
+               if (rc != 0)
+                       GOTO(out, rc);
 
+               lma->lma_incompat |=
+                       lustre_to_lma_flags(attr->la_flags);
+               lustre_lma_swab(lma);
+               rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA,
+                                    lma, sizeof(*lma), XATTR_REPLACE);
+               if (rc != 0) {
+                       struct osd_device *osd = osd_obj2dev(obj);
+
+                       CWARN("%s: set "DFID" lma flags %u failed: rc = %d\n",
+                             osd_name(osd), PFID(lu_object_fid(&dt->do_lu)),
+                             lma->lma_incompat, rc);
+               } else {
+                       obj->oo_lma_flags =
+                               attr->la_flags & LUSTRE_LMA_FL_MASKS;
+               }
+               osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
+       }
+out:
        osd_trans_exec_check(env, handle, OSD_OT_ATTR_SET);
 
         return rc;
@@ -2238,6 +2500,12 @@ static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
 
         ah->dah_parent = parent;
         ah->dah_mode = child_mode;
+
+       if (parent != NULL && !dt_object_remote(parent)) {
+               /* will help to find FID->ino at dt_insert("..") */
+               struct osd_object *pobj = osd_dt_obj(parent);
+               osd_idc_find_and_init(env, osd_obj2dev(pobj), pobj);
+       }
 }
 
 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
@@ -2262,20 +2530,20 @@ static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
        if (result)
                return;
 
-        if (attr->la_valid != 0) {
-                result = osd_inode_setattr(info->oti_env, inode, attr);
-                /*
-                 * The osd_inode_setattr() should always succeed here.  The
-                 * only error that could be returned is EDQUOT when we are
-                 * trying to change the UID or GID of the inode. However, this
-                 * should not happen since quota enforcement is no longer
-                 * enabled on ldiskfs (lquota takes care of it).
-                 */
+       if (attr->la_valid != 0) {
+               result = osd_inode_setattr(info->oti_env, inode, attr);
+               /*
+                * The osd_inode_setattr() should always succeed here.  The
+                * only error that could be returned is EDQUOT when we are
+                * trying to change the UID or GID of the inode. However, this
+                * should not happen since quota enforcement is no longer
+                * enabled on ldiskfs (lquota takes care of it).
+                */
                LASSERTF(result == 0, "%d\n", result);
                ll_dirty_inode(inode, I_DIRTY_DATASYNC);
-        }
+       }
 
-        attr->la_valid = valid;
+       attr->la_valid = valid;
 }
 
 /**
@@ -2413,6 +2681,10 @@ static int osd_declare_object_create(const struct lu_env *env,
        if (rc != 0)
                RETURN(rc);
 
+       /* will help to find FID->ino mapping at dt_insert() */
+       rc = osd_idc_find_and_init(env, osd_obj2dev(osd_dt_obj(dt)),
+                                  osd_dt_obj(dt));
+
        RETURN(rc);
 }
 
@@ -2488,6 +2760,13 @@ static int osd_declare_object_destroy(const struct lu_env *env,
        /* data to be truncated */
        rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
                                   0, oh, obj, true, NULL, false);
+       if (rc)
+               RETURN(rc);
+
+       /* will help to find FID->ino when this object is being
+        * added to PENDING/ */
+       rc = osd_idc_find_and_init(env, osd_obj2dev(obj), obj);
+
        RETURN(rc);
 }
 
@@ -2835,7 +3114,7 @@ static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
        const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
        struct osd_object       *obj    = osd_dt_obj(dt);
        struct osd_thread_info  *info   = osd_oti_get(env);
-       int                      result;
+       int                      result, on_ost = 0;
 
        ENTRY;
 
@@ -2861,13 +3140,15 @@ static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
 
                        fid_to_ostid(fid, oi);
                        ostid_to_fid(tfid, oi, 0);
+                       on_ost = 1;
                        result = osd_ea_fid_set(info, obj->oo_inode, tfid,
                                                LMAC_FID_ON_OST, 0);
                } else {
+                       on_ost = fid_is_on_ost(info, osd_obj2dev(obj),
+                                              fid, OI_CHECK_FLD);
                        result = osd_ea_fid_set(info, obj->oo_inode, fid,
-                               fid_is_on_ost(info, osd_obj2dev(obj),
-                                             fid, OI_CHECK_FLD) ?
-                               LMAC_FID_ON_OST : 0, 0);
+                                               on_ost ? LMAC_FID_ON_OST : 0,
+                                               0);
                }
                if (obj->oo_dt.do_body_ops == &osd_body_ops_new)
                        obj->oo_dt.do_body_ops = &osd_body_ops;
@@ -2876,6 +3157,15 @@ static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
        if (result == 0)
                result = __osd_oi_insert(env, obj, fid, th);
 
+       /* a small optimization - dt_insert() isn't usually applied
+        * to OST objects, so we don't need to cache OI mapping for
+        * OST objects */
+       if (result == 0 && on_ost == 0) {
+               struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
+               result = osd_idc_find_and_init(env, osd, obj);
+               LASSERT(result == 0);
+       }
+
        LASSERT(ergo(result == 0,
                     dt_object_exists(dt) && !dt_object_remote(dt)));
         LINVRNT(osd_invariant(obj));
@@ -2911,7 +3201,7 @@ static int osd_object_ref_add(const struct lu_env *env,
        struct osd_thandle *oh;
        int                 rc = 0;
 
-       if (!dt_object_exists(dt))
+       if (!dt_object_exists(dt) || obj->oo_destroyed)
                return -ENOENT;
 
        LINVRNT(osd_invariant(obj));
@@ -3397,7 +3687,7 @@ static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
                 result = 0;
        } else if (feat == &dt_directory_features) {
                 dt->do_index_ops = &osd_index_ea_ops;
-               if (obj->oo_inode != NULL && S_ISDIR(obj->oo_inode->i_mode))
+               if (obj->oo_inode == NULL || S_ISDIR(obj->oo_inode->i_mode))
                         result = 0;
                 else
                         result = -ENOTDIR;
@@ -3971,7 +4261,8 @@ static int __osd_ea_add_rec(struct osd_thread_info *info,
        child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
        child->d_fsdata = (void *)ldp;
        ll_vfs_dq_init(pobj->oo_inode);
-       rc = osd_ldiskfs_add_entry(oth->ot_handle, child, cinode, hlock);
+       rc = osd_ldiskfs_add_entry(info, oth->ot_handle, child,
+                                  cinode, hlock);
        if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_TYPE)) {
                struct ldiskfs_dir_entry_2      *de;
                struct buffer_head              *bh;
@@ -4030,7 +4321,7 @@ static int osd_add_dot_dotdot(struct osd_thread_info *info,
                 if (dir->oo_compat_dot_created) {
                         result = -EEXIST;
                 } else {
-                        LASSERT(inode == parent_dir);
+                       LASSERT(inode->i_ino == parent_dir->i_ino);
                         dir->oo_compat_dot_created = 1;
                         result = 0;
                 }
@@ -4397,65 +4688,6 @@ out:
 }
 
 /**
- * Find the osd object for given fid.
- *
- * \param fid need to find the osd object having this fid
- *
- * \retval osd_object on success
- * \retval        -ve on error
- */
-static struct osd_object *osd_object_find(const struct lu_env *env,
-                                         struct dt_object *dt,
-                                         const struct lu_fid *fid)
-{
-        struct lu_device  *ludev = dt->do_lu.lo_dev;
-        struct osd_object *child = NULL;
-        struct lu_object  *luch;
-        struct lu_object  *lo;
-
-       /*
-        * at this point topdev might not exist yet
-        * (i.e. MGS is preparing profiles). so we can
-        * not rely on topdev and instead lookup with
-        * our device passed as topdev. this can't work
-        * if the object isn't cached yet (as osd doesn't
-        * allocate lu_header). IOW, the object must be
-        * in the cache, otherwise lu_object_alloc() crashes
-        * -bzzz
-        */
-       luch = lu_object_find_at(env, ludev->ld_site->ls_top_dev == NULL ?
-                                ludev : ludev->ld_site->ls_top_dev,
-                                fid, NULL);
-       if (!IS_ERR(luch)) {
-               if (lu_object_exists(luch)) {
-                       lo = lu_object_locate(luch->lo_header, ludev->ld_type);
-                       if (lo != NULL)
-                               child = osd_obj(lo);
-                       else
-                               LU_OBJECT_DEBUG(D_ERROR, env, luch,
-                                               "lu_object can't be located"
-                                               DFID"\n", PFID(fid));
-
-                        if (child == NULL) {
-                                lu_object_put(env, luch);
-                                CERROR("Unable to get osd_object\n");
-                                child = ERR_PTR(-ENOENT);
-                        }
-                } else {
-                        LU_OBJECT_DEBUG(D_ERROR, env, luch,
-                                        "lu_object does not exists "DFID"\n",
-                                        PFID(fid));
-                       lu_object_put(env, luch);
-                        child = ERR_PTR(-ENOENT);
-                }
-       } else {
-               child = ERR_CAST(luch);
-       }
-
-       return child;
-}
-
-/**
  * Put the osd object once done with it.
  *
  * \param obj osd object that needs to be put
@@ -4474,28 +4706,34 @@ static int osd_index_declare_ea_insert(const struct lu_env *env,
 {
        struct osd_thandle      *oh;
        struct osd_device       *osd   = osd_dev(dt->do_lu.lo_dev);
-       struct lu_fid           *fid = (struct lu_fid *)rec;
+       struct dt_insert_rec    *rec1   = (struct dt_insert_rec *)rec;
+       const struct lu_fid     *fid    = rec1->rec_fid;
        int                      credits, rc = 0;
+       struct osd_idmap_cache  *idc;
        ENTRY;
 
        LASSERT(!dt_object_remote(dt));
        LASSERT(handle != NULL);
+       LASSERT(fid != NULL);
+       LASSERT(rec1->rec_type != 0);
 
        oh = container_of0(handle, struct osd_thandle, ot_super);
        LASSERT(oh->ot_handle == NULL);
 
        credits = osd_dto_credits_noquota[DTO_INDEX_INSERT];
-       if (fid != NULL) {
-               rc = osd_remote_fid(env, osd, fid);
-               if (unlikely(rc < 0))
-                       RETURN(rc);
-               if (rc > 0) {
-                       /* a reference to remote inode is represented by an
-                        * agent inode which we have to create */
-                       credits += osd_dto_credits_noquota[DTO_OBJECT_CREATE];
-                       credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
-               }
-               rc = 0;
+
+       /* we can't call iget() while a transactions is running
+        * (this can lead to a deadlock), but we need to know
+        * inum and object type. so we find this information at
+        * declaration and cache in per-thread info */
+       idc = osd_idc_find_or_init(env, osd, fid);
+       if (IS_ERR(idc))
+               RETURN(PTR_ERR(idc));
+       if (idc->oic_remote) {
+               /* a reference to remote inode is represented by an
+                * agent inode which we have to create */
+               credits += osd_dto_credits_noquota[DTO_OBJECT_CREATE];
+               credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
        }
 
        osd_trans_declare_op(env, oh, OSD_OT_INSERT, credits);
@@ -4536,9 +4774,8 @@ static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
        const struct lu_fid     *fid    = rec1->rec_fid;
        const char              *name = (const char *)key;
        struct osd_thread_info  *oti   = osd_oti_get(env);
-       struct osd_inode_id     *id    = &oti->oti_id;
        struct inode            *child_inode = NULL;
-       struct osd_object       *child = NULL;
+       struct osd_idmap_cache  *idc;
        int                     rc;
        ENTRY;
 
@@ -4553,14 +4790,22 @@ static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
 
        LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!\n", PFID(fid));
 
-       rc = osd_remote_fid(env, osd, fid);
-       if (rc < 0) {
-               CERROR("%s: Can not find object "DFID" rc %d\n",
-                      osd_name(osd), PFID(fid), rc);
-               RETURN(rc);
+       idc = osd_idc_find(env, osd, fid);
+       if (unlikely(idc == NULL)) {
+               /* this dt_insert() wasn't declared properly, so
+                * FID is missing in OI cache. we better do not
+                * lookup FID in FLDB/OI and don't risk to deadlock,
+                * but in some special cases (lfsck testing, etc)
+                * it's much simpler than fixing a caller */
+               CERROR("%s: "DFID" wasn't declared for insert\n",
+                      osd_name(osd), PFID(fid));
+               dump_stack();
+               idc = osd_idc_find_or_init(env, osd, fid);
+               if (IS_ERR(idc))
+                       RETURN(PTR_ERR(idc));
        }
 
-       if (rc == 1) {
+       if (idc->oic_remote) {
                /* Insert remote entry */
                if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
                        struct osd_mdobj_map    *omm = osd->od_mdt_map;
@@ -4586,15 +4831,23 @@ static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
                }
        } else {
                /* Insert local entry */
-               child = osd_object_find(env, dt, fid);
-               if (IS_ERR(child)) {
-                       CERROR("%s: Can not find object "DFID"%u:%u: rc = %d\n",
-                              osd_name(osd), PFID(fid),
-                              id->oii_ino, id->oii_gen,
-                              (int)PTR_ERR(child));
-                       RETURN(PTR_ERR(child));
+               if (unlikely(idc->oic_lid.oii_ino == 0)) {
+                       /* for a reason OI cache wasn't filled properly */
+                       CERROR("%s: OIC for "DFID" isn't filled\n",
+                              osd_name(osd), PFID(fid));
+                       RETURN(-EINVAL);
                }
-               child_inode = igrab(child->oo_inode);
+               child_inode = oti->oti_inode;
+               if (unlikely(child_inode == NULL)) {
+                       struct ldiskfs_inode_info *lii;
+                       OBD_ALLOC_PTR(lii);
+                       if (lii == NULL)
+                               RETURN(-ENOMEM);
+                       child_inode = oti->oti_inode = &lii->vfs_inode;
+               }
+               child_inode->i_sb = osd_sb(osd);
+               child_inode->i_ino = idc->oic_lid.oii_ino;
+               child_inode->i_mode = rec1->rec_type & S_IFMT;
        }
 
        rc = osd_ea_add_rec(env, obj, child_inode, name, fid, th);
@@ -4602,9 +4855,8 @@ static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
        CDEBUG(D_INODE, "parent %lu insert %s:%lu rc = %d\n",
               obj->oo_inode->i_ino, name, child_inode->i_ino, rc);
 
-       iput(child_inode);
-       if (child != NULL)
-               osd_object_put(env, child);
+       if (child_inode && child_inode != oti->oti_inode)
+               iput(child_inode);
        LASSERT(osd_invariant(obj));
        osd_trans_exec_check(env, th, OSD_OT_INSERT);
        RETURN(rc);
@@ -5020,11 +5272,17 @@ struct osd_filldir_cbs {
  * \retval 0 on success
  * \retval 1 on buffer full
  */
+#ifdef HAVE_FILLDIR_USE_CTX
+static int osd_ldiskfs_filldir(struct dir_context  *buf,
+                              const char *name, int namelen,
+#else
 static int osd_ldiskfs_filldir(void *buf, const char *name, int namelen,
+#endif
                                loff_t offset, __u64 ino,
                                unsigned d_type)
 {
-       struct osd_it_ea        *it   = ((struct osd_filldir_cbs *)buf)->it;
+       struct osd_it_ea        *it   =
+               ((struct osd_filldir_cbs *)buf)->it;
        struct osd_object       *obj  = it->oie_obj;
         struct osd_it_ea_dirent *ent  = it->oie_dirent;
         struct lu_fid           *fid  = &ent->oied_fid;
@@ -5239,6 +5497,7 @@ osd_dirent_reinsert(const struct lu_env *env, handle_t *jh,
        struct ldiskfs_dentry_param *ldp;
        int                          namelen    = dentry->d_name.len;
        int                          rc;
+       struct osd_thread_info     *info        = osd_oti_get(env);
        ENTRY;
 
        if (!LDISKFS_HAS_INCOMPAT_FEATURE(inode->i_sb,
@@ -5272,7 +5531,7 @@ osd_dirent_reinsert(const struct lu_env *env, handle_t *jh,
        osd_get_ldiskfs_dirent_param(ldp, fid);
        dentry->d_fsdata = (void *)ldp;
        ll_vfs_dq_init(dir);
-       rc = osd_ldiskfs_add_entry(jh, dentry, inode, hlock);
+       rc = osd_ldiskfs_add_entry(info, jh, dentry, inode, hlock);
        /* It is too bad, we cannot reinsert the name entry back.
         * That means we lose it! */
        if (rc != 0)
@@ -5445,11 +5704,13 @@ again:
 
                        if (jh == NULL) {
                                brelse(bh);
-                               if (hlock != NULL)
+                               dev->od_dirent_journal = 1;
+                               if (hlock != NULL) {
                                        ldiskfs_htree_unlock(hlock);
-                               else
+                                       hlock = NULL;
+                               } else {
                                        up_read(&obj->oo_ext_idx_sem);
-                               dev->od_dirent_journal = 1;
+                               }
 
                                goto again;
                        }
@@ -5479,11 +5740,13 @@ again:
 
                        if (jh == NULL) {
                                brelse(bh);
-                               if (hlock != NULL)
+                               dev->od_dirent_journal = 1;
+                               if (hlock != NULL) {
                                        ldiskfs_htree_unlock(hlock);
-                               else
+                                       hlock = NULL;
+                               } else {
                                        up_read(&obj->oo_ext_idx_sem);
-                               dev->od_dirent_journal = 1;
+                               }
 
                                goto again;
                        }
@@ -5519,11 +5782,13 @@ again:
 
                if (jh == NULL) {
                        brelse(bh);
-                       if (hlock != NULL)
+                       dev->od_dirent_journal = 1;
+                       if (hlock != NULL) {
                                ldiskfs_htree_unlock(hlock);
-                       else
+                               hlock = NULL;
+                       } else {
                                up_read(&obj->oo_ext_idx_sem);
-                       dev->od_dirent_journal = 1;
+                       }
 
                        goto again;
                }
@@ -5822,6 +6087,7 @@ static void osd_key_fini(const struct lu_context *ctx,
 {
        struct osd_thread_info *info = data;
        struct ldiskfs_inode_info *lli = LDISKFS_I(info->oti_inode);
+       struct osd_idmap_cache  *idc = info->oti_ins_cache;
 
        if (info->oti_inode != NULL)
                OBD_FREE_PTR(lli);
@@ -5831,6 +6097,12 @@ static void osd_key_fini(const struct lu_context *ctx,
        lu_buf_free(&info->oti_iobuf.dr_pg_buf);
        lu_buf_free(&info->oti_iobuf.dr_bl_buf);
        lu_buf_free(&info->oti_big_buf);
+       if (idc != NULL) {
+               LASSERT(info->oti_ins_cache_size > 0);
+               OBD_FREE(idc, sizeof(*idc) * info->oti_ins_cache_size);
+               info->oti_ins_cache = NULL;
+               info->oti_ins_cache_size = 0;
+       }
        OBD_FREE_PTR(info);
 }
 
@@ -5955,7 +6227,7 @@ static int osd_mount(const struct lu_env *env,
        struct osd_thread_info  *info = osd_oti_get(env);
        struct lu_fid           *fid = &info->oti_fid;
        struct inode            *inode;
-       int                      rc = 0, force_over_128tb = 0;
+       int                      rc = 0, force_over_256tb = 0;
         ENTRY;
 
        if (o->od_mnt != NULL)
@@ -5979,8 +6251,15 @@ static int osd_mount(const struct lu_env *env,
                RETURN(-EINVAL);
        }
 #endif
-       if (opts != NULL && strstr(opts, "force_over_128tb") != NULL)
-               force_over_128tb = 1;
+       if (opts != NULL && strstr(opts, "force_over_128tb") != NULL) {
+               CWARN("force_over_128tb option is depricated."
+                     "Filesystems less then 256TB can be created without any"
+                     "force options. Use force_over_256tb option for"
+                     "filesystems greather then 256TB.\n");
+       }
+
+       if (opts != NULL && strstr(opts, "force_over_256tb") != NULL)
+               force_over_256tb = 1;
 
        __page = alloc_page(GFP_IOFS);
        if (__page == NULL)
@@ -5999,7 +6278,12 @@ static int osd_mount(const struct lu_env *env,
                        "noextents",
                        /* strip out option we processed in osd */
                        "bigendian_extents",
-                       "force_over_128tb",
+#if LUSTRE_VERSION_CODE >= OBD_OCD_VERSION(3,0,53,0)
+#warning "remove force_over_128 option"
+#else
+                       "force_over_128tb (deprecated)",
+#endif
+                       "force_over_256tb",
                        NULL
                };
                strcat(options, opts);
@@ -6045,11 +6329,11 @@ static int osd_mount(const struct lu_env *env,
                GOTO(out, rc);
        }
 
-       if (ldiskfs_blocks_count(LDISKFS_SB(osd_sb(o))->s_es) > (8ULL << 32) &&
-           force_over_128tb == 0) {
+       if (ldiskfs_blocks_count(LDISKFS_SB(osd_sb(o))->s_es) > (64ULL << 30) &&
+           force_over_256tb == 0) {
                CERROR("%s: device %s LDISKFS does not support filesystems "
-                      "greater than 128TB and can cause data corruption. "
-                      "Use \"force_over_128tb\" mount option to override.\n",
+                      "greater than 256TB and can cause data corruption. "
+                      "Use \"force_over_256tb\" mount option to override.\n",
                       name, dev);
                GOTO(out, rc = -EINVAL);
        }