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- CROW-related fixes from b_hd_mdref
[fs/lustre-release.git] / lustre / mds / mds_lov.c
index 9cd8bbc..2270fd7 100644 (file)
@@ -30,6 +30,7 @@
 
 #include <linux/module.h>
 #include <linux/lustre_mds.h>
+#include <linux/obd_ost.h>
 #include <linux/lustre_idl.h>
 #include <linux/obd_class.h>
 #include <linux/obd_lov.h>
@@ -54,282 +55,321 @@ void cpu_to_le_lov_desc (struct lov_desc *ld)
         ld->ld_pattern = cpu_to_le32 (ld->ld_pattern);
 }
 
-void mds_lov_update_objids(struct obd_device *obd, obd_id *ids)
+void mds_dt_save_objids(struct obd_device *obd, obd_id *ids)
 {
         struct mds_obd *mds = &obd->u.mds;
         int i;
         ENTRY;
 
-        lock_kernel();
-        for (i = 0; i < mds->mds_lov_desc.ld_tgt_count; i++)
-                if (ids[i] > (mds->mds_lov_objids)[i])
-                        (mds->mds_lov_objids)[i] = ids[i];
-        unlock_kernel();
+        spin_lock(&mds->mds_dt_lock);
+        for (i = 0; i < mds->mds_dt_desc.ld_tgt_count; i++)
+                ids[i] = mds->mds_dt_objids[i];
+        spin_unlock(&mds->mds_dt_lock);
         EXIT;
 }
 
-static int mds_lov_read_objids(struct obd_device *obd)
+void mds_dt_update_objids(struct obd_device *obd, obd_id *ids)
 {
         struct mds_obd *mds = &obd->u.mds;
-        obd_id *ids;
+        int i;
+        ENTRY;
+
+        spin_lock(&mds->mds_dt_lock);
+        for (i = 0; i < mds->mds_dt_desc.ld_tgt_count; i++)
+                if (ids[i] > mds->mds_dt_objids[i])
+                        mds->mds_dt_objids[i] = ids[i];
+        spin_unlock(&mds->mds_dt_lock);
+        EXIT;
+}
+
+static int mds_dt_read_objids(struct obd_device *obd)
+{
+        struct mds_obd *mds = &obd->u.mds;
+        int i, rc, size;
         loff_t off = 0;
-        int i, rc, size = mds->mds_lov_desc.ld_tgt_count * sizeof(*ids);
+        obd_id *ids;
         ENTRY;
 
-        if (mds->mds_lov_objids != NULL)
+        if (mds->mds_dt_objids != NULL)
                 RETURN(0);
 
+        size = mds->mds_dt_desc.ld_tgt_count * sizeof(*ids);
         OBD_ALLOC(ids, size);
         if (ids == NULL)
                 RETURN(-ENOMEM);
-        mds->mds_lov_objids = ids;
+        mds->mds_dt_objids = ids;
 
-        if (mds->mds_lov_objid_filp->f_dentry->d_inode->i_size == 0)
+        if (mds->mds_dt_objid_filp->f_dentry->d_inode->i_size == 0)
                 RETURN(0);
-        rc = fsfilt_read_record(obd, mds->mds_lov_objid_filp, ids, size, &off);
+        
+        rc = fsfilt_read_record(obd, mds->mds_dt_objid_filp, ids, size, &off);
         if (rc < 0) {
-                CERROR("Error reading objids %d\n", rc);
+                CERROR("error reading objids %d\n", rc);
         } else {
-                mds->mds_lov_objids_valid = 1;
+                mds->mds_dt_objids_valid = 1;
                 rc = 0;
         }
 
-        for (i = 0; i < mds->mds_lov_desc.ld_tgt_count; i++)
-                CDEBUG(D_INFO, "read last object "LPU64" for idx %d\n",
-                       mds->mds_lov_objids[i], i);
+        for (i = 0; i < mds->mds_dt_desc.ld_tgt_count; i++) {
+                CDEBUG(D_INFO, "read last object "LPU64
+                       " for idx %d\n", mds->mds_dt_objids[i], i);
+        }
 
         RETURN(rc);
 }
 
-int mds_lov_write_objids(struct obd_device *obd)
+int mds_dt_write_objids(struct obd_device *obd)
 {
         struct mds_obd *mds = &obd->u.mds;
+        int i, rc, size;
         loff_t off = 0;
-        int i, rc, size = mds->mds_lov_desc.ld_tgt_count * sizeof(obd_id);
         ENTRY;
 
-        for (i = 0; i < mds->mds_lov_desc.ld_tgt_count; i++)
+        for (i = 0; i < mds->mds_dt_desc.ld_tgt_count; i++)
                 CDEBUG(D_INFO, "writing last object "LPU64" for idx %d\n",
-                       mds->mds_lov_objids[i], i);
+                       mds->mds_dt_objids[i], i);
 
-        rc = fsfilt_write_record(obd, mds->mds_lov_objid_filp,
-                                 mds->mds_lov_objids, size, &off, 0);
+        size = mds->mds_dt_desc.ld_tgt_count * sizeof(obd_id);
+        rc = fsfilt_write_record(obd, mds->mds_dt_objid_filp,
+                                 mds->mds_dt_objids, size, &off, 0);
         RETURN(rc);
 }
 
-static int mds_lov_clearorphans(struct mds_obd *mds, struct obd_uuid *ost_uuid)
+int mds_dt_clear_orphans(struct mds_obd *mds, struct obd_uuid *ost_uuid)
 {
+        struct lov_stripe_md *empty_ea = NULL;
+        struct obd_trans_info oti = { 0 };
+        struct obdo *oa = NULL;
         int rc;
-        struct obdo oa;
-        struct obd_trans_info oti = {0};
-        struct lov_stripe_md  *empty_ea = NULL;
         ENTRY;
 
-        LASSERT(mds->mds_lov_objids != NULL);
+        LASSERT(mds->mds_dt_objids != NULL);
 
-        /* This create will in fact either create or destroy:  If the OST is
+        /*
+         * this create will in fact either create or destroy: If the OST is
          * missing objects below this ID, they will be created.  If it finds
-         * objects above this ID, they will be removed. */
-        memset(&oa, 0, sizeof(oa));
-        oa.o_valid = OBD_MD_FLFLAGS;
-        oa.o_flags = OBD_FL_DELORPHAN;
+         * objects above this ID, they will be removed.
+         */
+       oa = obdo_alloc();
+        if (oa == NULL)
+                RETURN(-ENOMEM);
+        
+        memset(oa, 0, sizeof(*oa));
+
+        oa->o_gr = FILTER_GROUP_FIRST_MDS + mds->mds_num;
+        oa->o_valid = OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
+        oa->o_flags = OBD_FL_DELORPHAN;
+        
         if (ost_uuid != NULL) {
-                memcpy(&oa.o_inline, ost_uuid, sizeof(*ost_uuid));
-                oa.o_valid |= OBD_MD_FLINLINE;
+                memcpy(&oa->o_inline, ost_uuid,
+                       sizeof(*ost_uuid));
+                oa->o_valid |= OBD_MD_FLINLINE;
         }
-        rc = obd_create(mds->mds_osc_exp, &oa, &empty_ea, &oti);
 
+        /* 
+         * passing current objids for letting data layer know last objids MDS
+         * knows about and do appropriate. --umka
+         */
+        oti.oti_objid = mds->mds_dt_objids;
+        
+        rc = obd_create(mds->mds_dt_exp, oa,
+                        NULL, 0, &empty_ea, &oti);
+        
+        obdo_free(oa);
         RETURN(rc);
 }
 
-/* update the LOV-OSC knowledge of the last used object id's */
-int mds_lov_set_nextid(struct obd_device *obd)
+/* tell the LOV-OSC by how much to pre-create */
+int mds_dt_set_growth(struct mds_obd *mds, int count)
 {
-        struct mds_obd *mds = &obd->u.mds;
         int rc;
         ENTRY;
 
-        LASSERT(!obd->obd_recovering);
-
-        LASSERT(mds->mds_lov_objids != NULL);
-
-        rc = obd_set_info(mds->mds_osc_exp, strlen("next_id"), "next_id",
-                          mds->mds_lov_desc.ld_tgt_count, mds->mds_lov_objids);
-        if (rc < 0)
-                GOTO(out, rc);
-
-        rc = mds_lov_clearorphans(mds, NULL /* all OSTs */);
-        if (rc < 0)
-                GOTO(out, rc);
-
-out:
-        if (rc && mds->mds_lov_objids) {
-                /* Might as well crash here, until we figure out what to do.
-                 * If we OBD_FREE, we'll just LASSERT the next time through this
-                 * function. */
-                LBUG();
-                OBD_FREE(mds->mds_lov_objids,
-                         mds->mds_lov_desc.ld_tgt_count * sizeof(obd_id));
-                mds->mds_lov_objids = NULL;
-        }
+        rc = obd_set_info(mds->mds_dt_exp, strlen("growth_count"),
+                          "growth_count", sizeof(count), &count);
 
         RETURN(rc);
 }
 
-/* tell the LOV-OSC by how much to pre-create */
-int mds_lov_set_growth(struct mds_obd *mds, int count)
+static int mds_dt_update_desc(struct obd_device *obd, struct obd_export *lov)
 {
-        int rc;
+        struct mds_obd *mds = &obd->u.mds;
+        __u32 valsize = sizeof(mds->mds_dt_desc);
+        int old_count, rc = 0, i;
         ENTRY;
 
-        rc = obd_set_info(mds->mds_osc_exp, strlen("growth_count"),
-                          "growth_count", sizeof(count), &count);
+        old_count = mds->mds_dt_desc.ld_tgt_count;
+        
+        rc = obd_get_info(lov, strlen("lovdesc") + 1, "lovdesc",
+                          &valsize, &mds->mds_dt_desc);
+        if (rc)
+                RETURN(rc);
 
-        RETURN(rc);
+        /* The size of the LOV target table may have increased. */
+        if (old_count >= mds->mds_dt_desc.ld_tgt_count) {
+                obd_id *ids;
+                int     size;
+
+                size = mds->mds_dt_desc.ld_tgt_count * sizeof(*ids);
+                OBD_ALLOC(ids, size);
+                if (ids == NULL)
+                        RETURN(-ENOMEM);
+
+                memset(ids, 0, size);
+
+                if (mds->mds_dt_objids != NULL) {
+                        int oldsize = old_count * sizeof(*ids);
+
+                        memcpy(ids, mds->mds_dt_objids, oldsize);
+                        OBD_FREE(mds->mds_dt_objids, oldsize);
+                }
+                mds->mds_dt_objids = ids;
+        }
+
+        i = lov_mds_md_size(mds->mds_dt_desc.ld_tgt_count);
+        if (i > mds->mds_max_mdsize)
+                mds->mds_max_mdsize = i;
+        mds->mds_max_cookiesize = mds->mds_dt_desc.ld_tgt_count *
+                                  sizeof(struct llog_cookie);
+        mds->mds_has_dt_desc = 1;
+        RETURN(0);
 }
 
-int mds_lov_connect(struct obd_device *obd, char * lov_name)
+int mds_dt_connect(struct obd_device *obd, char *lov_name)
 {
         struct mds_obd *mds = &obd->u.mds;
-        struct lustre_handle conn = {0,};
-        int valsize;
-        int rc, i;
+        struct lustre_handle conn = { 0 };
+        int i, rc = 0;
         ENTRY;
 
-        if (IS_ERR(mds->mds_osc_obd))
-                RETURN(PTR_ERR(mds->mds_osc_obd));
+        if (IS_ERR(mds->mds_dt_obd))
+                RETURN(PTR_ERR(mds->mds_dt_obd));
 
-        if (mds->mds_osc_obd)
+        if (mds->mds_dt_obd)
                 RETURN(0);
 
-        mds->mds_osc_obd = class_name2obd(lov_name);
-        if (!mds->mds_osc_obd) {
-                CERROR("MDS cannot locate LOV %s\n",
-                       lov_name);
-                mds->mds_osc_obd = ERR_PTR(-ENOTCONN);
+        spin_lock_init(&mds->mds_dt_lock);
+        mds->mds_dt_obd = class_name2obd(lov_name);
+        if (!mds->mds_dt_obd) {
+                CERROR("MDS cannot locate LOV %s\n", lov_name);
+                mds->mds_dt_obd = ERR_PTR(-ENOTCONN);
                 RETURN(-ENOTCONN);
         }
 
-        rc = obd_connect(&conn, mds->mds_osc_obd, &obd->obd_uuid);
+        if (mds->mds_ost_sec) {
+                rc = obd_set_info(mds->mds_dt_obd->obd_self_export,
+                                  strlen("sec"), "sec",
+                                  strlen(mds->mds_ost_sec),
+                                  mds->mds_ost_sec);
+                if (rc) {
+                        mds->mds_dt_obd = ERR_PTR(rc);
+                        RETURN(rc);
+                }
+        }
+
+        CDEBUG(D_HA, "obd: %s osc: %s lov_name: %s\n",
+               obd->obd_name, mds->mds_dt_obd->obd_name, lov_name);
+
+        rc = obd_connect(&conn, mds->mds_dt_obd, &obd->obd_uuid, NULL,
+                         mds->mds_num + FILTER_GROUP_FIRST_MDS);
         if (rc) {
-                CERROR("MDS cannot connect to LOV %s (%d)\n",
-                       lov_name, rc);
-                mds->mds_osc_obd = ERR_PTR(rc);
+                CERROR("MDS cannot connect to LOV %s (%d)\n", lov_name, rc);
+                mds->mds_dt_obd = ERR_PTR(rc);
                 RETURN(rc);
         }
-        mds->mds_osc_exp = class_conn2export(&conn);
+        mds->mds_dt_exp = class_conn2export(&conn);
 
-        rc = obd_register_observer(mds->mds_osc_obd, obd);
+        rc = obd_register_observer(mds->mds_dt_obd, obd);
         if (rc) {
                 CERROR("MDS cannot register as observer of LOV %s (%d)\n",
                        lov_name, rc);
                 GOTO(err_discon, rc);
         }
 
-        valsize = sizeof(mds->mds_lov_desc);
-        rc = obd_get_info(mds->mds_osc_exp, strlen("lovdesc") + 1, "lovdesc",
-                          &valsize, &mds->mds_lov_desc);
+        rc = mds_dt_update_desc(obd, mds->mds_dt_exp);
         if (rc)
                 GOTO(err_reg, rc);
 
-        mds->mds_max_mdsize = lov_mds_md_size(mds->mds_lov_desc.ld_tgt_count);
-        mds->mds_max_cookiesize = mds->mds_lov_desc.ld_tgt_count*
-                sizeof(struct llog_cookie);
-        mds->mds_has_lov_desc = 1;
-        rc = mds_lov_read_objids(obd);
+        rc = mds_dt_read_objids(obd);
         if (rc) {
                 CERROR("cannot read %s: rc = %d\n", "lov_objids", rc);
                 GOTO(err_reg, rc);
         }
 
-        rc = llog_cat_initialize(obd, mds->mds_lov_desc.ld_tgt_count);
+        rc = obd_llog_cat_initialize(obd, &obd->obd_llogs, 
+                                     mds->mds_dt_desc.ld_tgt_count, CATLIST);
         if (rc) {
                 CERROR("failed to initialize catalog %d\n", rc);
                 GOTO(err_reg, rc);
         }
 
-        /* FIXME before set info call is made, we must initialize logging */
-        rc = obd_set_info(mds->mds_osc_exp, strlen("mds_conn"), "mds_conn",
-                          0, NULL);
-        if (rc)
-                GOTO(err_reg, rc);
-
-        /* If we're mounting this code for the first time on an existing FS,
-         * we need to populate the objids array from the real OST values */
-        if (!mds->mds_lov_objids_valid) {
-                int size = sizeof(obd_id) * mds->mds_lov_desc.ld_tgt_count;
-                rc = obd_get_info(mds->mds_osc_exp, strlen("last_id"),
-                                  "last_id", &size, mds->mds_lov_objids);
+        /*
+         * If we're mounting this code for the first time on an existing FS, we
+         * need to populate the objids array from the real OST values.
+         */
+        if (!mds->mds_dt_objids_valid) {
+                __u32 size = sizeof(obd_id) * mds->mds_dt_desc.ld_tgt_count;
+                
+                rc = obd_get_info(mds->mds_dt_exp, strlen("last_id"),
+                                  "last_id", &size, mds->mds_dt_objids);
                 if (!rc) {
-                        for (i = 0; i < mds->mds_lov_desc.ld_tgt_count; i++)
+                        for (i = 0; i < mds->mds_dt_desc.ld_tgt_count; i++)
                                 CWARN("got last object "LPU64" from OST %d\n",
-                                      mds->mds_lov_objids[i], i);
-                        mds->mds_lov_objids_valid = 1;
-                        rc = mds_lov_write_objids(obd);
+                                      mds->mds_dt_objids[i], i);
+                        mds->mds_dt_objids_valid = 1;
+                        rc = mds_dt_write_objids(obd);
                         if (rc)
                                 CERROR("got last objids from OSTs, but error "
                                        "writing objids file: %d\n", rc);
                 }
         }
 
-        /* I want to see a callback happen when the OBD moves to a
-         * "For General Use" state, and that's when we'll call
-         * set_nextid().  The class driver can help us here, because
-         * it can use the obd_recovering flag to determine when the
-         * the OBD is full available. */
+        /*
+         * I want to see a callback happen when the OBD moves to a "For General
+         * Use" state, and that's when we'll call set_nextid(). The class driver
+         * can help us here, because it can use the obd_recovering flag to
+         * determine when the the OBD is full available.
+         */
         if (!obd->obd_recovering) {
-                rc = llog_connect(llog_get_context(obd, LLOG_UNLINK_ORIG_CTXT),
-                                  obd->u.mds.mds_lov_desc.ld_tgt_count, NULL,
-                                  NULL);
-                if (rc != 0)
-                        CERROR("faild at llog_origin_connect: %d\n", rc);
-
-                rc = mds_cleanup_orphans(obd);
-                if (rc > 0)
-                        CERROR("Cleanup %d orphans while MDS isn't recovering\n", rc);
-
-                rc = mds_lov_set_nextid(obd);
-                if (rc)
-                        GOTO(err_llog, rc);
+                CDEBUG(D_OTHER, "call mds_postrecov_common()\n");
+                rc = mds_postrecov_common(obd);
+                if (rc > 0) 
+                        rc = 0;
         }
         RETURN(rc);
 
-err_llog:
-        /* cleanup all llogging subsystems */
-        rc = obd_llog_finish(obd, mds->mds_lov_desc.ld_tgt_count);
-        if (rc)
-                CERROR("failed to cleanup llogging subsystems\n");
 err_reg:
-        obd_register_observer(mds->mds_osc_obd, NULL);
+        obd_register_observer(mds->mds_dt_obd, NULL);
 err_discon:
-        obd_disconnect(mds->mds_osc_exp, 0);
-        mds->mds_osc_exp = NULL;
-        mds->mds_osc_obd = ERR_PTR(rc);
-        RETURN(rc);
+        obd_disconnect(mds->mds_dt_exp, 0);
+        mds->mds_dt_obd = ERR_PTR(rc);
+        mds->mds_dt_exp = NULL;
+        return rc;
 }
 
-int mds_lov_disconnect(struct obd_device *obd, int flags)
+int mds_dt_disconnect(struct obd_device *obd, int flags)
 {
         struct mds_obd *mds = &obd->u.mds;
         int rc = 0;
         ENTRY;
 
-        if (!IS_ERR(mds->mds_osc_obd) && mds->mds_osc_exp != NULL) {
+        if (!IS_ERR(mds->mds_dt_obd) && mds->mds_dt_exp != NULL) {
                 /* cleanup all llogging subsystems */
-                rc = obd_llog_finish(obd, mds->mds_lov_desc.ld_tgt_count);
+                rc = obd_llog_finish(obd, &obd->obd_llogs,
+                                     mds->mds_dt_desc.ld_tgt_count);
                 if (rc)
                         CERROR("failed to cleanup llogging subsystems\n");
 
-                obd_register_observer(mds->mds_osc_obd, NULL);
+                obd_register_observer(mds->mds_dt_obd, NULL);
 
-                rc = obd_disconnect(mds->mds_osc_exp, flags);
+                rc = obd_disconnect(mds->mds_dt_exp, flags);
                 /* if obd_disconnect fails (probably because the
                  * export was disconnected by class_disconnect_exports)
                  * then we just need to drop our ref. */
                 if (rc != 0)
-                        class_export_put(mds->mds_osc_exp);
-                mds->mds_osc_exp = NULL;
-                mds->mds_osc_obd = NULL;
+                        class_export_put(mds->mds_dt_exp);
+                mds->mds_dt_exp = NULL;
+                mds->mds_dt_obd = NULL;
         }
 
         RETURN(rc);
@@ -342,24 +382,28 @@ int mds_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
         struct obd_device *obd = exp->exp_obd;
         struct mds_obd *mds = &obd->u.mds;
         struct obd_ioctl_data *data = karg;
-        struct obd_run_ctxt saved;
+        struct lvfs_run_ctxt saved;
         int rc = 0;
+        ENTRY;
 
+        CDEBUG(D_INFO, "ioctl cmd %x\n", cmd);
         switch (cmd) {
         case OBD_IOC_RECORD: {
                 char *name = data->ioc_inlbuf1;
                 if (mds->mds_cfg_llh)
                         RETURN(-EBUSY);
 
-                push_ctxt(&saved, &obd->obd_ctxt, NULL);
-                rc = llog_create(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT),
-                                 &mds->mds_cfg_llh, NULL, name);
+                push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+                rc = llog_open(llog_get_context(&obd->obd_llogs, 
+                                                LLOG_CONFIG_ORIG_CTXT),
+                               &mds->mds_cfg_llh, NULL, name,
+                               OBD_LLOG_FL_CREATE);
                 if (rc == 0)
                         llog_init_handle(mds->mds_cfg_llh, LLOG_F_IS_PLAIN,
                                          &cfg_uuid);
                 else
                         mds->mds_cfg_llh = NULL;
-                pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+                pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 
                 RETURN(rc);
         }
@@ -368,9 +412,32 @@ int mds_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
                 if (!mds->mds_cfg_llh)
                         RETURN(-EBADF);
 
-                push_ctxt(&saved, &obd->obd_ctxt, NULL);
+                push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
                 rc = llog_close(mds->mds_cfg_llh);
-                pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+                pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+
+                mds->mds_cfg_llh = NULL;
+                RETURN(rc);
+        }
+
+        case OBD_IOC_CLEAR_LOG: {
+                char *name = data->ioc_inlbuf1;
+                if (mds->mds_cfg_llh)
+                        RETURN(-EBUSY);
+
+                push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+                rc = llog_open(llog_get_context(&obd->obd_llogs, 
+                                                LLOG_CONFIG_ORIG_CTXT),
+                               &mds->mds_cfg_llh, NULL, name,
+                               OBD_LLOG_FL_CREATE);
+                if (rc == 0) {
+                        llog_init_handle(mds->mds_cfg_llh, LLOG_F_IS_PLAIN,
+                                         NULL);
+
+                        rc = llog_destroy(mds->mds_cfg_llh);
+                        llog_free_handle(mds->mds_cfg_llh);
+                }
+                pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 
                 mds->mds_cfg_llh = NULL;
                 RETURN(rc);
@@ -382,6 +449,8 @@ int mds_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
                 if (!mds->mds_cfg_llh)
                         RETURN(-EBADF);
 
+                /* XXX - this probably should be a parameter to this ioctl.
+                 * For now, just use llh_max_transno for expediency. */
                 rec.lrh_len = llog_data_len(data->ioc_plen1);
 
                 if (data->ioc_type == LUSTRE_CFG_TYPE) {
@@ -402,39 +471,34 @@ int mds_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
                         RETURN(rc);
                 }
 
-                push_ctxt(&saved, &obd->obd_ctxt, NULL);
+                push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
                 rc = llog_write_rec(mds->mds_cfg_llh, &rec, NULL, 0,
                                     cfg_buf, -1);
-                pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+                pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 
                 OBD_FREE(cfg_buf, data->ioc_plen1);
                 RETURN(rc);
         }
-
         case OBD_IOC_PARSE: {
                 struct llog_ctxt *ctxt =
-                        llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
-                push_ctxt(&saved, &obd->obd_ctxt, NULL);
-                rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
-                pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+                        llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT);
+                push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+                rc = class_config_process_llog(ctxt, data->ioc_inlbuf1, NULL);
+                pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
                 if (rc)
                         RETURN(rc);
 
                 RETURN(rc);
         }
-
         case OBD_IOC_DUMP_LOG: {
                 struct llog_ctxt *ctxt =
-                        llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
-                push_ctxt(&saved, &obd->obd_ctxt, NULL);
+                        llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT);
+                push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
                 rc = class_config_dump_llog(ctxt, data->ioc_inlbuf1, NULL);
-                pop_ctxt(&saved, &obd->obd_ctxt, NULL);
-                if (rc)
-                        RETURN(rc);
+                pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 
                 RETURN(rc);
         }
-
         case OBD_IOC_SET_READONLY: {
                 void *handle;
                 struct inode *inode = obd->u.mds.mds_sb->s_root->d_inode;
@@ -444,15 +508,15 @@ int mds_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 
                 handle = fsfilt_start(obd, inode, FSFILT_OP_MKNOD, NULL);
                 LASSERT(handle);
-                rc = fsfilt_commit(obd, inode, handle, 1);
+                rc = fsfilt_commit(obd, obd->u.mds.mds_sb, inode, handle, 1);
 
-                dev_set_rdonly(ll_sbdev(obd->u.mds.mds_sb), 2);
+                ll_set_rdonly(ll_sbdev(obd->u.mds.mds_sb));
                 RETURN(0);
         }
 
         case OBD_IOC_CATLOGLIST: {
-                int count = mds->mds_lov_desc.ld_tgt_count;
-                rc = llog_catlog_list(obd, count, data);
+                int count = mds->mds_dt_desc.ld_tgt_count;
+                rc = llog_catalog_list(obd, count, data);
                 RETURN(rc);
 
         }
@@ -460,67 +524,319 @@ int mds_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
         case OBD_IOC_LLOG_CANCEL:
         case OBD_IOC_LLOG_REMOVE: {
                 struct llog_ctxt *ctxt =
-                        llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
+                        llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT);
+                int rc2, valsize;
+                __u32 group;
 
-                obd_llog_finish(obd, mds->mds_lov_desc.ld_tgt_count);
-                push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
+                obd_llog_finish(obd, &obd->obd_llogs,
+                                mds->mds_dt_desc.ld_tgt_count);
+                push_ctxt(&saved, ctxt->loc_lvfs_ctxt, NULL);
                 rc = llog_ioctl(ctxt, cmd, data);
-                pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
-                llog_cat_initialize(obd, mds->mds_lov_desc.ld_tgt_count);
-
+                pop_ctxt(&saved, ctxt->loc_lvfs_ctxt, NULL);
+                obd_llog_cat_initialize(obd, &obd->obd_llogs, 
+                                        mds->mds_dt_desc.ld_tgt_count,
+                                        CATLIST);
+                group = FILTER_GROUP_FIRST_MDS + mds->mds_num;
+                valsize = sizeof(group);
+                rc2 = obd_set_info(mds->mds_dt_exp, strlen("mds_conn"),
+                                   "mds_conn", valsize, &group);
+                if (!rc)
+                        rc = rc2;
                 RETURN(rc);
         }
         case OBD_IOC_LLOG_INFO:
         case OBD_IOC_LLOG_PRINT: {
                 struct llog_ctxt *ctxt =
-                        llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
+                        llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT);
 
-                push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
+                push_ctxt(&saved, ctxt->loc_lvfs_ctxt, NULL);
                 rc = llog_ioctl(ctxt, cmd, data);
-                pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
+                pop_ctxt(&saved, ctxt->loc_lvfs_ctxt, NULL);
 
                 RETURN(rc);
         }
 
         case OBD_IOC_ABORT_RECOVERY:
-                CERROR("aborting recovery for device %s\n", obd->obd_name);
-                target_abort_recovery(obd);
+                target_stop_recovery_thread(obd);
                 RETURN(0);
+        case OBD_IOC_ROOT_SQUASH: {
+                __u32 *p = (__u32 *) data->ioc_inlbuf1;
 
+                if (data->ioc_inllen1 !=
+                    (sizeof(__u32) * 4 + sizeof(ptl_nid_t)))
+                        RETURN(-EINVAL);
+
+                if (*p == 0) { /* get */
+                        p += 2;
+                        *p++ = mds->mds_squash_uid;
+                        *p++ = mds->mds_squash_gid;
+                        *((ptl_nid_t*) p) = mds->mds_nosquash_nid;
+                } else { /* set */
+                        p += 2;
+                        mds->mds_squash_uid = *p++;
+                        mds->mds_squash_gid = *p++;
+                        mds->mds_nosquash_nid = *((ptl_nid_t*) p);
+                        CWARN("MDS: squash root to %d:%d, except nid 0x%llx\n",
+                               mds->mds_squash_uid, mds->mds_squash_gid,
+                               mds->mds_nosquash_nid);
+                }
+                RETURN(0);
+        }
         default:
+                CDEBUG(D_INFO, "unknown command %x\n", cmd);
                 RETURN(-EINVAL);
         }
         RETURN(0);
+
+}
+
+struct mds_dt_sync_info {
+        struct obd_device *mlsi_obd;      /* the mds to sync */
+        struct obd_device *mlsi_watched;  /* new lov target */
+        int                mlsi_index;    /* index into mds_dt_objids */ 
+};
+
+int mds_dt_synchronize(void *data)
+{
+        struct mds_dt_sync_info *mlsi = data;
+        struct llog_ctxt *ctxt;
+        struct obd_device *obd;
+        struct obd_device *watched;
+        struct mds_obd *mds;
+        struct obd_uuid *uuid;
+        obd_id vals[2];
+        unsigned long flags;
+        __u32  vallen;
+        __u32  group;
+        int old_count;
+        int count;
+        int index;
+        int rc;
+        char name[32] = "CATLIST";
+
+        lock_kernel();
+
+        ptlrpc_daemonize();
+
+        SIGNAL_MASK_LOCK(current, flags);
+        sigfillset(&current->blocked);
+        RECALC_SIGPENDING;
+        SIGNAL_MASK_UNLOCK(current, flags);
+
+        unlock_kernel();
+
+        obd = mlsi->mlsi_obd;
+        watched = mlsi->mlsi_watched;
+        index = mlsi->mlsi_index;
+
+        LASSERT(obd != NULL);
+        LASSERT(watched != NULL);
+
+        OBD_FREE(mlsi, sizeof(*mlsi));
+
+        mds = &obd->u.mds;
+        down(&mds->mds_orphan_recovery_sem);
+
+        uuid = &watched->u.cli.cl_import->imp_target_uuid;
+
+        group = FILTER_GROUP_FIRST_MDS + mds->mds_num;
+        rc = obd_set_info(watched->obd_self_export, strlen("mds_conn"),
+                          "mds_conn", sizeof(group), &group);
+        if (rc)
+                GOTO(cleanup, rc);
+
+        old_count = mds->mds_dt_desc.ld_tgt_count;
+
+        rc = mds_dt_update_desc(obd, mds->mds_dt_exp);
+        if (rc)
+                GOTO(cleanup, rc);
+
+        count = mds->mds_dt_desc.ld_tgt_count;
+        LASSERT(count >= old_count);
+
+        vallen = sizeof(vals[1]);
+        rc = obd_get_info(watched->obd_self_export, strlen("last_id"),
+                          "last_id", &vallen, &vals[1]);
+        if (rc)
+                GOTO(cleanup, rc);
+
+        /* we don't set next id manually, instead OSCs will set them
+         * during own recovery from DELORPHAN reply -bzzz */
+#if 0
+        vals[0] = index;
+        rc = mds_dt_set_info(obd->obd_self_export, strlen("next_id"),
+                             "next_id", 2, vals);
+        if (rc)
+                GOTO(cleanup, rc);
+#endif
+
+        obd_llog_finish(obd, &obd->obd_llogs, old_count);
+        obd_llog_cat_initialize(obd, &obd->obd_llogs, count, name);
+
+        ctxt = llog_get_context(&obd->obd_llogs, LLOG_UNLINK_ORIG_CTXT);
+        LASSERT(ctxt != NULL);
+
+        rc = llog_connect(ctxt, count, NULL, NULL, uuid);
+        if (rc != 0) {
+                CERROR("%s: failed at llog_origin_connect: %d\n", 
+                       obd->obd_name, rc);
+                GOTO(cleanup, rc);
+        }
+        
+        CWARN("MDS %s: %s now active, resetting orphans\n",
+              obd->obd_name, uuid->uuid);
+
+        rc = mds_dt_clear_orphans(&obd->u.mds, uuid);
+        if (rc != 0) {
+                CERROR("%s: failed at mds_dt_clear_orphans(): %d\n", 
+                       obd->obd_name, rc);
+                GOTO(cleanup, rc);
+        }
+        rc = 0;
+
+        EXIT;
+cleanup:
+        up(&mds->mds_orphan_recovery_sem);
+        return rc;
+}
+
+int mds_dt_start_synchronize(struct obd_device *obd,
+                             struct obd_device *watched, 
+                            void *data)
+{
+        struct mds_dt_sync_info *mlsi;
+        int rc;
+        
+        ENTRY;
+
+        OBD_ALLOC(mlsi, sizeof(*mlsi));
+        if (mlsi == NULL)
+                RETURN(-ENOMEM);
+
+        mlsi->mlsi_obd = obd;
+        mlsi->mlsi_watched = watched;
+        mlsi->mlsi_index = (int)data;
+
+        rc = kernel_thread(mds_dt_synchronize, mlsi, CLONE_VM | CLONE_FILES);
+        if (rc < 0)
+                CERROR("%s: error starting mds_dt_synchronize(): %d\n", 
+                       obd->obd_name, rc);
+        else {
+                CDEBUG(D_HA, "%s: mds_dt_synchronize() thread: %d\n", 
+                       obd->obd_name, rc);
+                rc = 0;
+        }
+
+        RETURN(rc);
 }
 
 int mds_notify(struct obd_device *obd, struct obd_device *watched,
-               int active)
+               int active, void *data)
 {
-        struct obd_uuid *uuid; 
         int rc = 0;
+        ENTRY;
 
         if (!active)
                 RETURN(0);
 
-        if (strcmp(watched->obd_type->typ_name, "osc")) {
+        if (!strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME))
+                RETURN(0);
+
+        if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
                 CERROR("unexpected notification of %s %s!\n",
-                       watched->obd_type->typ_name,
-                       watched->obd_name);
+                       watched->obd_type->typ_name, watched->obd_name);
                 RETURN(-EINVAL);
         }
 
         if (obd->obd_recovering) {
+                struct obd_uuid *uuid;
+                uuid = &watched->u.cli.cl_import->imp_target_uuid;
+
                 CWARN("MDS %s: in recovery, not resetting orphans on %s\n",
                       obd->obd_name, uuid->uuid);
         } else {
-                uuid = &watched->u.cli.cl_import->imp_target_uuid;
-                CWARN("MDS %s: %s now active, resetting orphans\n",
-                      obd->obd_name, uuid->uuid);
-                rc = mds_lov_clearorphans(&obd->u.mds, uuid);
+                rc = mds_dt_start_synchronize(obd, watched, data);
         }
         RETURN(rc);
 }
 
+int mds_dt_set_info(struct obd_export *exp, obd_count keylen,
+                    void *key, obd_count vallen, void *val)
+{
+        struct obd_device *obd = class_exp2obd(exp);
+        struct mds_obd *mds = &obd->u.mds;
+        ENTRY;
+
+#define KEY_IS(str) \
+        (keylen == strlen(str) && memcmp(key, str, keylen) == 0)
+
+        if (KEY_IS("next_id")) {
+                obd_id *id = (obd_id *)val;
+                int idx;
+
+                /* XXX - this really should be vallen != (2 * sizeof(*id)) *
+                 * Just following the precedent set by lov_set_info.       */
+                if (vallen != 2)
+                        RETURN(-EINVAL);
+
+                idx = *id;
+                if ((idx != *id) || (idx >= mds->mds_dt_desc.ld_tgt_count))
+                        RETURN(-EINVAL);
+
+                CDEBUG(D_CONFIG, "idx: %d id: %llu\n", idx, *(id + 1));
+
+                mds->mds_dt_objids[idx] = *++id;
+                CDEBUG(D_CONFIG, "objid: %d: %lld\n", idx, *id);
+                /* XXX - should we be writing this out here ? */
+                RETURN(mds_dt_write_objids(obd));
+        }
+
+        RETURN(-EINVAL);
+}
+
+int mds_dt_update_config(struct obd_device *obd, int clean)
+{
+        struct mds_obd *mds = &obd->u.mds;
+        struct lvfs_run_ctxt saved;
+        struct config_llog_instance cfg;
+        struct llog_ctxt *ctxt;
+        char *profile = mds->mds_profile, *name;
+        int rc, version, namelen;
+        ENTRY;
+
+        if (profile == NULL)
+                RETURN(0);
+
+        cfg.cfg_instance = NULL;
+        cfg.cfg_uuid = mds->mds_dt_uuid;
+
+        namelen = strlen(profile) + 20; /* -clean-######### */
+        OBD_ALLOC(name, namelen);
+        if (name == NULL)
+                RETURN(-ENOMEM);
+
+        if (clean) {
+                version = mds->mds_config_version - 1;
+                sprintf(name, "%s-clean-%d", profile, version);
+        } else {
+                version = mds->mds_config_version + 1;
+                sprintf(name, "%s-%d", profile, version);
+        }
+
+        CWARN("Applying configuration log %s\n", name);
+
+        push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+        ctxt = llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT);
+        rc = class_config_process_llog(ctxt, name, &cfg);
+        pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+        if (rc == 0)
+                mds->mds_config_version = version;
+        CWARN("Finished applying configuration log %s: %d\n", name, rc);
+
+        OBD_FREE(name, namelen);
+        RETURN(rc);
+}
+
 /* Convert the on-disk LOV EA structre.
  * We always try to convert from an old LOV EA format to the common in-memory
  * (lsm) format (obd_unpackmd() understands the old on-disk (lmm) format) and
@@ -544,13 +860,13 @@ int mds_convert_lov_ea(struct obd_device *obd, struct inode *inode,
         if (le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC)
                 RETURN(0);
 
-        CWARN("converting LOV EA on %lu/%u from V0 to V1\n",
-              inode->i_ino, inode->i_generation);
-        rc = obd_unpackmd(obd->u.mds.mds_osc_exp, &lsm, lmm, lmm_size);
+        CDEBUG(D_INODE, "converting LOV EA on %lu/%u from V0 to V1\n",      
+                inode->i_ino, inode->i_generation);
+        rc = obd_unpackmd(obd->u.mds.mds_dt_exp, &lsm, lmm, lmm_size);
         if (rc < 0)
                 GOTO(conv_end, rc);
 
-        rc = obd_packmd(obd->u.mds.mds_osc_exp, &lmm, lsm);
+        rc = obd_packmd(obd->u.mds.mds_dt_exp, &lmm, lsm);
         if (rc < 0)
                 GOTO(conv_free, rc);
         lmm_size = rc;
@@ -561,14 +877,100 @@ int mds_convert_lov_ea(struct obd_device *obd, struct inode *inode,
                 GOTO(conv_free, rc);
         }
 
-        rc = fsfilt_set_md(obd, inode, handle, lmm, lmm_size);
-
-        err = fsfilt_commit(obd, inode, handle, 0);
+        rc = fsfilt_set_md(obd, inode, handle, lmm, lmm_size, EA_LOV);
+        err = fsfilt_commit(obd, obd->u.mds.mds_sb, inode, handle, 0);
         if (!rc)
                 rc = err ? err : lmm_size;
         GOTO(conv_free, rc);
 conv_free:
-        obd_free_memmd(obd->u.mds.mds_osc_exp, &lsm);
+        obd_free_memmd(obd->u.mds.mds_dt_exp, &lsm);
 conv_end:
         return rc;
 }
+
+/* Must be called with i_sem held */
+int mds_revalidate_lov_ea(struct obd_device *obd, struct inode *inode,
+                          struct lustre_msg *msg, int offset)
+{
+        struct mds_obd *mds = &obd->u.mds;
+        struct obd_export *dt_exp = mds->mds_dt_exp;
+        struct lov_mds_md *lmm= NULL;
+        struct lov_stripe_md *lsm = NULL;
+        struct obdo *oa = NULL;
+        struct obd_trans_info oti = {0};
+        obd_valid valid = 0;
+        int lmm_size = 0, lsm_size = 0, err, rc;
+        void *handle;
+        ENTRY;
+
+        LASSERT(down_trylock(&inode->i_sem) != 0);
+
+        /* XXX - add way to know if EA is already up to date & return
+         * without doing anything. Easy to do since we get notified of
+         * LOV updates. */
+
+        lmm = lustre_msg_buf(msg, offset, 0);
+        if (lmm == NULL) {
+                CDEBUG(D_INFO, "no space reserved for inode %lu MD\n",
+                       inode->i_ino);
+                RETURN(0);
+        }
+        lmm_size = msg->buflens[offset];
+
+        rc = obd_unpackmd(dt_exp, &lsm, lmm, lmm_size);
+        if (rc < 0)
+                RETURN(0);
+
+        lsm_size = rc;
+
+        LASSERT(lsm->lsm_magic == LOV_MAGIC);
+
+        oa = obdo_alloc();
+        if (oa == NULL)
+                GOTO(out_lsm, rc = -ENOMEM);
+        oa->o_mode = S_IFREG | 0600;
+        oa->o_id = inode->i_ino;
+        oa->o_generation = inode->i_generation;
+        oa->o_uid = 0; /* must have 0 uid / gid on OST */
+        oa->o_gid = 0;
+        oa->o_gr = FILTER_GROUP_FIRST_MDS + mds->mds_num;
+
+        oa->o_valid = OBD_MD_FLID | OBD_MD_FLGENER | OBD_MD_FLTYPE |
+                      OBD_MD_FLMODE | OBD_MD_FLUID | OBD_MD_FLGID |
+                      OBD_MD_FLGROUP;
+        valid = OBD_MD_FLTYPE | OBD_MD_FLATIME | OBD_MD_FLMTIME |
+                OBD_MD_FLCTIME;
+        obdo_from_inode(oa, inode, valid);
+
+        rc = obd_revalidate_md(dt_exp, oa, lsm, &oti);
+        if (rc == 0)
+                GOTO(out_oa, rc);
+        if (rc < 0) {
+                CERROR("Error validating LOV EA on %lu/%u: %d\n",
+                       inode->i_ino, inode->i_generation, rc);
+                GOTO(out_oa, rc);
+        }
+
+        rc = obd_packmd(dt_exp, &lmm, lsm);
+        if (rc < 0)
+                GOTO(out_oa, rc);
+        lmm_size = rc;
+
+        handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
+        if (IS_ERR(handle)) {
+                rc = PTR_ERR(handle);
+                GOTO(out_oa, rc);
+        }
+
+        rc = fsfilt_set_md(obd, inode, handle, lmm, lmm_size, EA_LOV);
+        err = fsfilt_commit(obd, inode->i_sb, inode, handle, 0);
+        if (!rc)
+                rc = err;
+
+        EXIT;
+out_oa:
+        obdo_free(oa);
+out_lsm:
+        obd_free_memmd(dt_exp, &lsm);
+        return rc;
+}