-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/mds/mds_lov.c
- *
- * Lustre Metadata Server (mds) handling of striped file data
- *
- * Author: Peter Braam <braam@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_MDS
-
-#include <linux/module.h>
-#include <lustre_mds.h>
-#include <lustre/lustre_idl.h>
-#include <obd_class.h>
-#include <obd_lov.h>
-#include <lustre_lib.h>
-#include <lustre_fsfilt.h>
-#include <obd_cksum.h>
-#include <lustre_log.h>
-
-#include "mds_internal.h"
-
-static void mds_lov_dump_objids(const char *label, struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- unsigned int i=0, j;
-
- if ((libcfs_debug & D_INFO) == 0)
- return;
-
- CDEBUG(D_INFO, "dump from %s\n", label);
- if (mds->mds_lov_page_dirty == NULL) {
- CERROR("NULL bitmap!\n");
- GOTO(skip_bitmap, i);
- }
-
- for(i = 0; i < mds->mds_lov_page_dirty->size / BITS_PER_LONG + 1; i++)
- CDEBUG(D_INFO, "%u - %lx\n", i,
- mds->mds_lov_page_dirty->data[i]);
-skip_bitmap:
- if (mds->mds_lov_page_array == NULL) {
- CERROR("not init page array!\n");
- GOTO(skip_array, i);
-
- }
- for(i = 0;i < MDS_LOV_OBJID_PAGES_COUNT; i++) {
- obd_id *data = mds->mds_lov_page_array[i];
-
- if (data == NULL)
- continue;
-
- for(j=0; j < OBJID_PER_PAGE(); j++) {
- if (data[j] == 0)
- continue;
- CDEBUG(D_INFO,"objid page %u idx %u - "LPU64" \n",
- i, j, data[j]);
- }
- }
-skip_array:
- EXIT;
-}
-
-int mds_lov_init_objids(struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- int size = MDS_LOV_OBJID_PAGES_COUNT*sizeof(void *);
- struct file *file;
- int rc;
- ENTRY;
-
- CLASSERT(((MDS_LOV_ALLOC_SIZE % sizeof(obd_id)) == 0));
-
- mds->mds_lov_page_dirty =
- CFS_ALLOCATE_BITMAP(MDS_LOV_OBJID_PAGES_COUNT);
- if (mds->mds_lov_page_dirty == NULL)
- RETURN(-ENOMEM);
-
-
- OBD_ALLOC(mds->mds_lov_page_array, size);
- if (mds->mds_lov_page_array == NULL)
- GOTO(err_free_bitmap, rc = -ENOMEM);
-
- /* open and test the lov objd file */
- file = filp_open(LOV_OBJID, O_RDWR | O_CREAT, 0644);
- if (IS_ERR(file)) {
- rc = PTR_ERR(file);
- CERROR("cannot open/create %s file: rc = %d\n", LOV_OBJID, rc);
- GOTO(err_free, rc = PTR_ERR(file));
- }
- if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
- CERROR("%s is not a regular file!: mode = %o\n", LOV_OBJID,
- file->f_dentry->d_inode->i_mode);
- GOTO(err_open, rc = -ENOENT);
- }
- mds->mds_lov_objid_filp = file;
-
- RETURN (0);
-err_open:
- if (filp_close((struct file *)file, 0))
- CERROR("can't close %s after error\n", LOV_OBJID);
-err_free:
- OBD_FREE(mds->mds_lov_page_array, size);
-err_free_bitmap:
- CFS_FREE_BITMAP(mds->mds_lov_page_dirty);
-
- RETURN(rc);
-}
-
-void mds_lov_destroy_objids(struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- int i, rc;
- ENTRY;
-
- if (mds->mds_lov_page_array != NULL) {
- for(i=0;i<MDS_LOV_OBJID_PAGES_COUNT;i++) {
- obd_id *data = mds->mds_lov_page_array[i];
- if (data != NULL)
- OBD_FREE(data, MDS_LOV_ALLOC_SIZE);
- }
- OBD_FREE(mds->mds_lov_page_array,
- MDS_LOV_OBJID_PAGES_COUNT*sizeof(void *));
- }
-
- if (mds->mds_lov_objid_filp) {
- rc = filp_close((struct file *)mds->mds_lov_objid_filp, NULL);
- mds->mds_lov_objid_filp = NULL;
- if (rc)
- CERROR("%s file won't close, rc=%d\n", LOV_OBJID, rc);
- }
-
- CFS_FREE_BITMAP(mds->mds_lov_page_dirty);
- EXIT;
-}
-
-/**
- * currently exist two ways for know about ost count and max ost index.
- * first - after ost is connected to mds and sync process finished
- * second - get from lmm in recovery process, in case when mds not have configs,
- * and ost isn't registered in mgs.
- *
- * \param mds pointer to mds structure
- * \param index maxium ost index
- *
- * \retval -ENOMEM is not hame memory for new page
- * \retval 0 is update passed
- */
-static int mds_lov_update_max_ost(struct mds_obd *mds, obd_id index)
-{
- __u32 page = index / OBJID_PER_PAGE();
- __u32 off = index % OBJID_PER_PAGE();
- obd_id *data = mds->mds_lov_page_array[page];
-
- if (data == NULL) {
- OBD_ALLOC(data, MDS_LOV_ALLOC_SIZE);
- if (data == NULL)
- RETURN(-ENOMEM);
-
- mds->mds_lov_page_array[page] = data;
- }
-
- if (index > mds->mds_lov_objid_max_index) {
- mds->mds_lov_objid_lastpage = page;
- mds->mds_lov_objid_lastidx = off;
- mds->mds_lov_objid_max_index = index;
- }
-
- /* workaround - New target not in objids file; increase mdsize */
- /* ld_tgt_count is used as the max index everywhere, despite its name. */
- if (data[off] == 0) {
- __u32 max_easize;
- __u32 stripes;
-
- max_easize = mds->mds_obt.obt_osd_properties.osd_max_ea_size;
- data[off] = 1;
- mds->mds_lov_objid_count++;
- stripes = min(lov_mds_md_stripecnt(max_easize, LOV_MAGIC_V3),
- mds->mds_lov_objid_count);
-
- mds->mds_max_mdsize = lov_mds_md_size(stripes, LOV_MAGIC_V3);
- mds->mds_max_cookiesize = stripes * sizeof(struct llog_cookie);
-
- CDEBUG(D_CONFIG, "updated max_mdsize/max_cookiesize for %d"
- " stripes: %d/%d\n", stripes, mds->mds_max_mdsize,
- mds->mds_max_cookiesize);
- }
-
- EXIT;
- return 0;
-}
-
-static int mds_lov_objinit(struct mds_obd *mds, __u32 index)
-{
- __u32 page = index / OBJID_PER_PAGE();
- __u32 off = index % OBJID_PER_PAGE();
- obd_id *data = mds->mds_lov_page_array[page];
-
- return (data[off] > 0);
-}
-
-int mds_lov_prepare_objids(struct obd_device *obd, struct lov_mds_md *lmm)
-{
- struct lov_ost_data_v1 *data;
- __u16 count;
- int rc = 0;
- __u32 j;
-
- /* if we create file without objects - lmm is NULL */
- if (lmm == NULL)
- return 0;
-
- switch (le32_to_cpu(lmm->lmm_magic)) {
- case LOV_MAGIC_V1:
- count = le16_to_cpu(((struct lov_mds_md_v1*)lmm)->lmm_stripe_count);
- data = &(((struct lov_mds_md_v1*)lmm)->lmm_objects[0]);
- break;
- case LOV_MAGIC_V3:
- count = le16_to_cpu(((struct lov_mds_md_v3*)lmm)->lmm_stripe_count);
- data = &(((struct lov_mds_md_v3*)lmm)->lmm_objects[0]);
- break;
- default:
- CERROR("Unknow lmm type %X!\n", le32_to_cpu(lmm->lmm_magic));
- RETURN(-EINVAL);
- }
-
-
- cfs_mutex_lock(&obd->obd_dev_mutex);
- for (j = 0; j < count; j++) {
- __u32 i = le32_to_cpu(data[j].l_ost_idx);
- if (mds_lov_update_max_ost(&obd->u.mds, i)) {
- rc = -ENOMEM;
- break;
- }
- }
- cfs_mutex_unlock(&obd->obd_dev_mutex);
-
- RETURN(rc);
-}
-EXPORT_SYMBOL(mds_lov_prepare_objids);
-
-/*
- * write llog orphan record about lost ost object,
- * Special lsm is allocated with single stripe, caller should deallocated it
- * after use
- */
-static int mds_log_lost_precreated(struct obd_device *obd,
- struct lov_stripe_md **lsmp, __u16 *stripes,
- obd_id id, obd_count count, int idx)
-{
- struct lov_stripe_md *lsm = *lsmp;
- int rc;
- ENTRY;
-
- if (*lsmp == NULL) {
- rc = obd_alloc_memmd(obd->u.mds.mds_lov_exp, &lsm);
- if (rc < 0)
- RETURN(rc);
- /* need only one stripe, save old value */
- *stripes = lsm->lsm_stripe_count;
- lsm->lsm_stripe_count = 1;
- *lsmp = lsm;
- }
-
- lsm->lsm_oinfo[0]->loi_id = id;
- lsm->lsm_oinfo[0]->loi_seq = mdt_to_obd_objseq(obd->u.mds.mds_id);
- lsm->lsm_oinfo[0]->loi_ost_idx = idx;
-
- rc = mds_log_op_orphan(obd, lsm, count);
- RETURN(rc);
-}
-
-void mds_lov_update_objids(struct obd_device *obd, struct lov_mds_md *lmm)
-{
- struct mds_obd *mds = &obd->u.mds;
- int j;
- struct lov_ost_data_v1 *obj;
- struct lov_stripe_md *lsm = NULL;
- __u16 stripes = 0;
- int count;
- ENTRY;
-
- /* if we create file without objects - lmm is NULL */
- if (lmm == NULL)
- return;
-
- switch (le32_to_cpu(lmm->lmm_magic)) {
- case LOV_MAGIC_V1:
- count = le16_to_cpu(((struct lov_mds_md_v1*)lmm)->lmm_stripe_count);
- obj = ((struct lov_mds_md_v1*)lmm)->lmm_objects;
- break;
- case LOV_MAGIC_V3:
- count = le16_to_cpu(((struct lov_mds_md_v3*)lmm)->lmm_stripe_count);
- obj = ((struct lov_mds_md_v3*)lmm)->lmm_objects;
- break;
- default:
- CERROR("Unknow lmm type %X !\n",
- le32_to_cpu(lmm->lmm_magic));
- return;
- }
-
- for (j = 0; j < count; j++) {
- __u32 i = le32_to_cpu(obj[j].l_ost_idx);
- obd_id id = le64_to_cpu(obj[j].l_object_id);
- __u32 page = i / OBJID_PER_PAGE();
- __u32 idx = i % OBJID_PER_PAGE();
- obd_id *data;
-
- data = mds->mds_lov_page_array[page];
-
- CDEBUG(D_INODE,"update last object for ost %u"
- " - new "LPU64" old "LPU64"\n", i, id, data[idx]);
- if (id > data[idx]) {
- int lost = id - data[idx] - 1;
- /* we might have lost precreated objects due to VBR */
- if (lost > 0 && obd->obd_recovering) {
- CDEBUG(D_HA, "Gap in objids is %u\n", lost);
- if (!obd->obd_version_recov)
- CERROR("Unexpected gap in objids\n");
- /* lsm is allocated if NULL */
- mds_log_lost_precreated(obd, &lsm, &stripes,
- data[idx]+1, lost, i);
- }
- data[idx] = id;
- cfs_bitmap_set(mds->mds_lov_page_dirty, page);
- }
- }
- if (lsm) {
- /* restore stripes number */
- lsm->lsm_stripe_count = stripes;
- obd_free_memmd(mds->mds_lov_exp, &lsm);
- }
- EXIT;
- return;
-}
-EXPORT_SYMBOL(mds_lov_update_objids);
-
-static int mds_lov_update_from_read(struct mds_obd *mds, obd_id *data,
- __u32 count)
-{
- __u32 max_easize = mds->mds_obt.obt_osd_properties.osd_max_ea_size;
- __u32 i, stripes;
-
- for (i = 0; i < count; i++) {
- if (data[i] == 0)
- continue;
-
- mds->mds_lov_objid_count++;
- }
-
- stripes = min(lov_mds_md_stripecnt(max_easize, LOV_MAGIC_V3),
- mds->mds_lov_objid_count);
-
- mds->mds_max_mdsize = lov_mds_md_size(stripes, LOV_MAGIC_V3);
- mds->mds_max_cookiesize = stripes * sizeof(struct llog_cookie);
-
- CDEBUG(D_CONFIG, "updated max_mdsize/max_cookiesize for %d stripes: "
- "%d/%d\n", stripes, mds->mds_max_mdsize,
- mds->mds_max_cookiesize);
-
- EXIT;
- return 0;
-}
-
-static int mds_lov_read_objids(struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- loff_t off = 0;
- int i, rc = 0, count = 0, page = 0;
- unsigned long size;
- ENTRY;
-
- /* Read everything in the file, even if our current lov desc
- has fewer targets. Old targets not in the lov descriptor
- during mds setup may still have valid objids. */
- size = i_size_read(mds->mds_lov_objid_filp->f_dentry->d_inode);
- if (size == 0)
- RETURN(0);
-
- page = (size + MDS_LOV_ALLOC_SIZE - 1) / MDS_LOV_ALLOC_SIZE;
- CDEBUG(D_INFO, "file size %lu pages %d\n", size, page);
- for (i = 0; i < page; i++) {
- obd_id *data;
- loff_t off_old = off;
-
- LASSERT(mds->mds_lov_page_array[i] == NULL);
- OBD_ALLOC(mds->mds_lov_page_array[i], MDS_LOV_ALLOC_SIZE);
- if (mds->mds_lov_page_array[i] == NULL)
- GOTO(out, rc = -ENOMEM);
-
- data = mds->mds_lov_page_array[i];
-
- rc = fsfilt_read_record(obd, mds->mds_lov_objid_filp, data,
- MDS_LOV_ALLOC_SIZE, &off);
- if (rc < 0) {
- CERROR("Error reading objids %d\n", rc);
- GOTO(out, rc);
- }
- if (off == off_old) /* hole is read */
- off += MDS_LOV_ALLOC_SIZE;
-
- count = (off - off_old) / sizeof(obd_id);
- if (mds_lov_update_from_read(mds, data, count)) {
- CERROR("Can't update mds data\n");
- GOTO(out, rc = -EIO);
- }
- }
- mds->mds_lov_objid_lastpage = page - 1;
- mds->mds_lov_objid_lastidx = count - 1;
-
- CDEBUG(D_INFO, "Read %u - %u %u objid\n", mds->mds_lov_objid_count,
- mds->mds_lov_objid_lastpage, mds->mds_lov_objid_lastidx);
-out:
- mds_lov_dump_objids("read",obd);
-
- RETURN(rc);
-}
-
-int mds_lov_write_objids(struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- int i = 0, rc = 0;
- ENTRY;
-
- if (cfs_bitmap_check_empty(mds->mds_lov_page_dirty))
- RETURN(0);
-
- mds_lov_dump_objids("write", obd);
-
- cfs_foreach_bit(mds->mds_lov_page_dirty, i) {
- obd_id *data = mds->mds_lov_page_array[i];
- unsigned int size = MDS_LOV_ALLOC_SIZE;
- loff_t off = i * size;
-
- LASSERT(data != NULL);
-
- if (!cfs_bitmap_test_and_clear(mds->mds_lov_page_dirty, i))
- continue;
-
- /* check for particaly filled last page */
- if (i == mds->mds_lov_objid_lastpage)
- size = (mds->mds_lov_objid_lastidx+1) * sizeof(obd_id);
-
- CDEBUG(D_INFO, "write %lld - %u\n", off, size);
- rc = fsfilt_write_record(obd, mds->mds_lov_objid_filp, data,
- size, &off, 0);
- if (rc < 0) {
- cfs_bitmap_set(mds->mds_lov_page_dirty, i);
- break;
- }
- }
- if (rc >= 0)
- rc = 0;
-
- RETURN(rc);
-}
-EXPORT_SYMBOL(mds_lov_write_objids);
-
-static int mds_lov_get_objid(struct obd_device * obd,
- obd_id idx)
-{
- struct mds_obd *mds = &obd->u.mds;
- struct obd_export *lov_exp = mds->mds_lov_exp;
- unsigned int page;
- unsigned int off;
- obd_id *data;
- __u32 size;
- int rc = 0;
- ENTRY;
-
- page = idx / OBJID_PER_PAGE();
- off = idx % OBJID_PER_PAGE();
- data = mds->mds_lov_page_array[page];
-
- if (data[off] < 2) {
- /* We never read this lastid; ask the osc */
- struct obd_id_info lastid;
-
- size = sizeof(lastid);
- lastid.idx = idx;
- lastid.data = &data[off];
- rc = obd_get_info(NULL, lov_exp, sizeof(KEY_LAST_ID),
- KEY_LAST_ID, &size, &lastid, NULL);
- if (rc)
- GOTO(out, rc);
-
- /* workaround for clean filter */
- if (data[off] == 0)
- data[off] = 1;
-
- cfs_bitmap_set(mds->mds_lov_page_dirty, page);
- }
- CDEBUG(D_INFO, "idx "LPU64" - %p - %d/%d - "LPU64"\n",
- idx, data, page, off, data[off]);
-out:
- RETURN(rc);
-}
-
-int mds_lov_clear_orphans(struct mds_obd *mds, struct obd_uuid *ost_uuid)
-{
- int rc;
- struct obdo oa = { 0 };
- struct obd_trans_info oti = {0};
- struct lov_stripe_md *empty_ea = NULL;
- ENTRY;
-
- LASSERT(mds->mds_lov_page_array != NULL);
-
- /* 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_flags = OBD_FL_DELORPHAN;
- oa.o_seq = mdt_to_obd_objseq(mds->mds_id);
- oa.o_valid = OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
- if (ost_uuid != NULL)
- oti.oti_ost_uuid = ost_uuid;
-
- rc = obd_create(NULL, mds->mds_lov_exp, &oa, &empty_ea, &oti);
-
- RETURN(rc);
-}
-
-/* for one target */
-static int mds_lov_set_one_nextid(struct obd_device *obd, __u32 idx, obd_id *id)
-{
- struct mds_obd *mds = &obd->u.mds;
- int rc;
- struct obd_id_info info;
- ENTRY;
-
- LASSERT(!obd->obd_recovering);
-
- info.idx = idx;
- info.data = id;
- rc = obd_set_info_async(NULL, mds->mds_lov_exp, sizeof(KEY_NEXT_ID),
- KEY_NEXT_ID, sizeof(info), &info, NULL);
- if (rc)
- CERROR ("%s: mds_lov_set_nextid failed (%d)\n",
- obd->obd_name, rc);
-
- RETURN(rc);
-}
-
-/* Update the lov desc for a new size lov. */
-static int mds_lov_update_desc(struct obd_device *obd, int idx,
- struct obd_uuid *uuid)
-{
- struct mds_obd *mds = &obd->u.mds;
- struct lov_desc *ld;
- __u32 valsize = sizeof(mds->mds_lov_desc);
- int rc = 0;
- ENTRY;
-
- OBD_ALLOC(ld, sizeof(*ld));
- if (!ld)
- RETURN(-ENOMEM);
-
- rc = obd_get_info(NULL, mds->mds_lov_exp, sizeof(KEY_LOVDESC),
- KEY_LOVDESC, &valsize, ld, NULL);
- if (rc)
- GOTO(out, rc);
-
- /* Don't change the mds_lov_desc until the objids size matches the
- count (paranoia) */
- mds->mds_lov_desc = *ld;
- CDEBUG(D_CONFIG, "updated lov_desc, tgt_count: %d - idx %d / uuid %s\n",
- mds->mds_lov_desc.ld_tgt_count, idx, uuid->uuid);
-
- cfs_mutex_lock(&obd->obd_dev_mutex);
- rc = mds_lov_update_max_ost(mds, idx);
- cfs_mutex_unlock(&obd->obd_dev_mutex);
- if (rc != 0)
- GOTO(out, rc );
-
- /* If we added a target we have to reconnect the llogs */
- /* We only _need_ to do this at first add (idx), or the first time
- after recovery. However, it should now be safe to call anytime. */
- rc = obd_llog_init(obd, &obd->obd_olg, obd, &idx);
- if (rc)
- GOTO(out, rc);
-
-out:
- OBD_FREE(ld, sizeof(*ld));
- RETURN(rc);
-}
-
-/* Inform MDS about new/updated target */
-static int mds_lov_update_mds(struct obd_device *obd,
- struct obd_device *watched,
- __u32 idx)
-{
- struct mds_obd *mds = &obd->u.mds;
- int rc = 0;
- int page;
- int off;
- obd_id *data;
- ENTRY;
-
- LASSERT(mds_lov_objinit(mds, idx));
-
- CDEBUG(D_CONFIG, "idx=%d, recov=%d/%d, cnt=%d\n",
- idx, obd->obd_recovering, obd->obd_async_recov,
- mds->mds_lov_desc.ld_tgt_count);
-
- /* idx is set as data from lov_notify. */
- if (obd->obd_recovering)
- GOTO(out, rc);
-
- if (idx >= mds->mds_lov_desc.ld_tgt_count) {
- CERROR("index %d > count %d!\n", idx,
- mds->mds_lov_desc.ld_tgt_count);
- GOTO(out, rc = -EINVAL);
- }
-
- rc = mds_lov_get_objid(obd, idx);
- if (rc)
- GOTO(out, rc);
-
- page = idx / OBJID_PER_PAGE();
- off = idx % OBJID_PER_PAGE();
- data = mds->mds_lov_page_array[page];
-
- /* We have read this lastid from disk; tell the osc.
- Don't call this during recovery. */
- rc = mds_lov_set_one_nextid(obd, idx, &data[off]);
- if (rc) {
- CERROR("Failed to set next id, idx=%d rc=%d\n", idx,rc);
- /* Don't abort the rest of the sync */
- rc = 0;
- } else {
- CDEBUG(D_CONFIG, "last object "LPU64" from OST %d rc=%d\n",
- data[off], idx, rc);
- }
-out:
- RETURN(rc);
-}
-
-/* update the LOV-OSC knowledge of the last used object id's */
-int mds_lov_connect(struct obd_device *obd, char * lov_name)
-{
- struct mds_obd *mds = &obd->u.mds;
- struct obd_connect_data *data;
- int rc;
- ENTRY;
-
- if (IS_ERR(mds->mds_lov_obd))
- RETURN(PTR_ERR(mds->mds_lov_obd));
-
- if (mds->mds_lov_obd)
- RETURN(0);
-
- mds->mds_lov_obd = class_name2obd(lov_name);
- if (!mds->mds_lov_obd) {
- CERROR("MDS cannot locate LOV %s\n", lov_name);
- mds->mds_lov_obd = ERR_PTR(-ENOTCONN);
- RETURN(-ENOTCONN);
- }
-
- cfs_mutex_lock(&obd->obd_dev_mutex);
- rc = mds_lov_read_objids(obd);
- cfs_mutex_unlock(&obd->obd_dev_mutex);
- if (rc) {
- CERROR("cannot read %s: rc = %d\n", "lov_objids", rc);
- GOTO(err_exit, rc);
- }
-
- rc = obd_register_observer(mds->mds_lov_obd, obd);
- if (rc) {
- CERROR("MDS cannot register as observer of LOV %s (%d)\n",
- lov_name, rc);
- GOTO(err_exit, rc);
- }
-
- /* ask lov to generate OBD_NOTIFY_CREATE events for already registered
- * targets */
- obd_notify(mds->mds_lov_obd, NULL, OBD_NOTIFY_CREATE, NULL);
-
- mds->mds_lov_obd->u.lov.lov_sp_me = LUSTRE_SP_MDT;
-
- OBD_ALLOC(data, sizeof(*data));
- if (data == NULL)
- GOTO(err_exit, rc = -ENOMEM);
-
- data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX |
- OBD_CONNECT_REQPORTAL | OBD_CONNECT_QUOTA64 |
- OBD_CONNECT_OSS_CAPA | OBD_CONNECT_FULL20 |
- OBD_CONNECT_CHANGE_QS | OBD_CONNECT_AT |
- OBD_CONNECT_MDS | OBD_CONNECT_SKIP_ORPHAN |
- OBD_CONNECT_SOM | OBD_CONNECT_MAX_EASIZE;
-#ifdef HAVE_LRU_RESIZE_SUPPORT
- data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
-#endif
- data->ocd_version = LUSTRE_VERSION_CODE;
- data->ocd_group = mdt_to_obd_objseq(mds->mds_id);
- data->ocd_max_easize = mds->mds_obt.obt_osd_properties.osd_max_ea_size;
-
- /* send max bytes per rpc */
- data->ocd_brw_size = PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT;
- /* send the list of supported checksum types */
- data->ocd_cksum_types = cksum_types_supported_client();
- /* NB: lov_connect() needs to fill in .ocd_index for each OST */
- rc = obd_connect(NULL, &mds->mds_lov_exp, mds->mds_lov_obd, &obd->obd_uuid, data, NULL);
- OBD_FREE(data, sizeof(*data));
- if (rc) {
- CERROR("MDS cannot connect to LOV %s (%d)\n", lov_name, rc);
- mds->mds_lov_obd = ERR_PTR(rc);
- RETURN(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. */
- /* MDD device will care about that
- if (!obd->obd_recovering)
- rc = mds_postrecov(obd);
- */
- RETURN(rc);
-
-err_exit:
- mds->mds_lov_exp = NULL;
- mds->mds_lov_obd = ERR_PTR(rc);
- RETURN(rc);
-}
-
-int mds_lov_disconnect(struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- int rc = 0;
- ENTRY;
-
- if (!IS_ERR(mds->mds_lov_obd) && mds->mds_lov_exp != NULL) {
- obd_register_observer(mds->mds_lov_obd, NULL);
-
- /* The actual disconnect of the mds_lov will be called from
- * class_disconnect_exports from mds_lov_clean. So we have to
- * ensure that class_cleanup doesn't fail due to the extra ref
- * we're holding now. The mechanism to do that already exists -
- * the obd_force flag. We'll drop the final ref to the
- * mds_lov_exp in mds_cleanup. */
- mds->mds_lov_obd->obd_force = 1;
- }
-
- RETURN(rc);
-}
-
-struct mds_lov_sync_info {
- struct obd_device *mlsi_obd; /* the lov device to sync */
- struct obd_device *mlsi_watched; /* target osc */
- __u32 mlsi_index; /* index of target */
-};
-
-static int mds_propagate_capa_keys(struct mds_obd *mds, struct obd_uuid *uuid)
-{
- struct mds_capa_info info = { .uuid = uuid };
- struct lustre_capa_key *key;
- int i, rc = 0;
-
- ENTRY;
-
- if (!mds->mds_capa_keys)
- RETURN(0);
-
- OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_SYNC_CAPA_SL, 5);
- for (i = 0; i < 2; i++) {
- key = &mds->mds_capa_keys[i];
- DEBUG_CAPA_KEY(D_SEC, key, "propagate");
-
- info.capa = key;
- rc = obd_set_info_async(NULL, mds->mds_lov_exp,
- sizeof(KEY_CAPA_KEY), KEY_CAPA_KEY,
- sizeof(info), &info, NULL);
- if (rc) {
- DEBUG_CAPA_KEY(D_ERROR, key,
- "propagate failed (rc = %d) for", rc);
- RETURN(rc);
- }
- }
-
- RETURN(0);
-}
-
-/* We only sync one osc at a time, so that we don't have to hold
- any kind of lock on the whole mds_lov_desc, which may change
- (grow) as a result of mds_lov_add_ost. This also avoids any
- kind of mismatch between the lov_desc and the mds_lov_desc,
- which are not in lock-step during lov_add_obd */
-static int __mds_lov_synchronize(void *data)
-{
- struct mds_lov_sync_info *mlsi = data;
- struct obd_device *obd = mlsi->mlsi_obd;
- struct obd_device *watched = mlsi->mlsi_watched;
- struct mds_obd *mds = &obd->u.mds;
- struct obd_uuid *uuid;
- __u32 idx = mlsi->mlsi_index;
- struct mds_group_info mgi;
- struct llog_ctxt *ctxt;
- int rc = 0;
- ENTRY;
-
- OBD_FREE_PTR(mlsi);
-
- LASSERT(obd);
- LASSERT(watched);
- uuid = &watched->u.cli.cl_target_uuid;
- LASSERT(uuid);
-
- cfs_down_read(&mds->mds_notify_lock);
- if (obd->obd_stopping || obd->obd_fail)
- GOTO(out, rc = -ENODEV);
-
- OBD_RACE(OBD_FAIL_MDS_LOV_SYNC_RACE);
- rc = mds_lov_update_mds(obd, watched, idx);
- if (rc != 0) {
- CERROR("%s failed at update_mds: %d\n", obd_uuid2str(uuid), rc);
- GOTO(out, rc);
- }
- mgi.group = mdt_to_obd_objseq(mds->mds_id);
- mgi.uuid = uuid;
-
- rc = obd_set_info_async(NULL, mds->mds_lov_exp, sizeof(KEY_MDS_CONN),
- KEY_MDS_CONN, sizeof(mgi), &mgi, NULL);
- if (rc != 0)
- GOTO(out, rc);
- /* propagate capability keys */
- rc = mds_propagate_capa_keys(mds, uuid);
- if (rc)
- GOTO(out, rc);
-
- ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
- if (!ctxt)
- GOTO(out, rc = -ENODEV);
-
- OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_LLOG_SYNC_TIMEOUT, 60);
- rc = llog_connect(ctxt, NULL, NULL, uuid);
- llog_ctxt_put(ctxt);
- if (rc != 0) {
- CERROR("%s failed at llog_origin_connect: %d\n",
- obd_uuid2str(uuid), rc);
- GOTO(out, rc);
- }
-
- LCONSOLE_INFO("MDS %s: %s now active, resetting orphans\n",
- obd->obd_name, obd_uuid2str(uuid));
-
- rc = mds_lov_clear_orphans(mds, uuid);
- if (rc != 0) {
- CERROR("%s failed at mds_lov_clear_orphans: %d\n",
- obd_uuid2str(uuid), rc);
- GOTO(out, rc);
- }
-
- EXIT;
-out:
- if (rc) {
- /* Deactivate it for safety */
- CERROR("%s sync failed %d, deactivating\n", obd_uuid2str(uuid),
- rc);
- if (!obd->obd_stopping && mds->mds_lov_obd &&
- !mds->mds_lov_obd->obd_stopping && !watched->obd_stopping)
- obd_notify(mds->mds_lov_obd, watched,
- OBD_NOTIFY_INACTIVE, NULL);
- }
- cfs_up_read(&mds->mds_notify_lock);
-
- class_decref(obd, "mds_lov_synchronize", obd);
- return rc;
-}
-
-int mds_lov_synchronize(void *data)
-{
- struct mds_lov_sync_info *mlsi = data;
- char name[20];
-
- snprintf(name, sizeof(name), "ll_sync_%02u", mlsi->mlsi_index);
- cfs_daemonize_ctxt(name);
-
- RETURN(__mds_lov_synchronize(data));
-}
-
-int mds_lov_start_synchronize(struct obd_device *obd,
- struct obd_device *watched,
- void *data, enum obd_notify_event ev)
-{
- struct mds_lov_sync_info *mlsi;
- int rc;
- struct obd_uuid *uuid;
- ENTRY;
-
- LASSERT(watched);
- uuid = &watched->u.cli.cl_target_uuid;
-
- OBD_ALLOC(mlsi, sizeof(*mlsi));
- if (mlsi == NULL)
- RETURN(-ENOMEM);
-
- LASSERT(data);
- mlsi->mlsi_obd = obd;
- mlsi->mlsi_watched = watched;
- mlsi->mlsi_index = *(__u32 *)data;
-
- /* Although class_export_get(obd->obd_self_export) would lock
- the MDS in place, since it's only a self-export
- it doesn't lock the LOV in place. The LOV can be disconnected
- during MDS precleanup, leaving nothing for __mds_lov_synchronize.
- Simply taking an export ref on the LOV doesn't help, because it's
- still disconnected. Taking an obd reference insures that we don't
- disconnect the LOV. This of course means a cleanup won't
- finish for as long as the sync is blocking. */
- class_incref(obd, "mds_lov_synchronize", obd);
-
- if (ev != OBD_NOTIFY_SYNC) {
- /* Synchronize in the background */
- rc = cfs_create_thread(mds_lov_synchronize, mlsi,
- CFS_DAEMON_FLAGS);
- if (rc < 0) {
- CERROR("%s: error starting mds_lov_synchronize: %d\n",
- obd->obd_name, rc);
- class_decref(obd, "mds_lov_synchronize", obd);
- } else {
- CDEBUG(D_HA, "%s: mds_lov_synchronize idx=%d "
- "thread=%d\n", obd->obd_name,
- mlsi->mlsi_index, rc);
- rc = 0;
- }
- } else {
- rc = __mds_lov_synchronize((void *)mlsi);
- }
-
- RETURN(rc);
-}
-
-int mds_notify(struct obd_device *obd, struct obd_device *watched,
- enum obd_notify_event ev, void *data)
-{
- struct mds_obd *mds = &obd->u.mds;
- int rc = 0;
- ENTRY;
-
- CDEBUG(D_CONFIG, "notify %s ev=%d\n", watched->obd_name, ev);
-
- if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME) != 0) {
- CERROR("unexpected notification of %s %s!\n",
- watched->obd_type->typ_name, watched->obd_name);
- RETURN(-EINVAL);
- }
-
- /*XXX this notifies the MDD until lov handling use old mds code
- * must non block!
- */
- if (obd->obd_upcall.onu_owner) {
- LASSERT(obd->obd_upcall.onu_upcall != NULL);
- rc = obd->obd_upcall.onu_upcall(obd, NULL, ev,
- obd->obd_upcall.onu_owner,
- &mds->mds_obt.obt_mount_count);
- }
-
- switch (ev) {
- /* We only handle these: */
- case OBD_NOTIFY_CREATE:
- CDEBUG(D_CONFIG, "%s: add target %s\n", obd->obd_name,
- obd_uuid2str(&watched->u.cli.cl_target_uuid));
- /* We still have to fix the lov descriptor for ost's */
- LASSERT(data);
- rc = mds_lov_update_desc(obd, *(__u32 *)data,
- &watched->u.cli.cl_target_uuid);
- RETURN(rc);
- case OBD_NOTIFY_ACTIVE:
- /* lov want one or more _active_ targets for work */
- /* activate event should be pass lov idx as argument */
- case OBD_NOTIFY_SYNC:
- case OBD_NOTIFY_SYNC_NONBLOCK:
- /* sync event should be pass lov idx as argument */
- break;
- default:
- RETURN(0);
- }
-
- if (obd->obd_recovering) {
- CDEBUG(D_CONFIG, "%s: Is in recovery, "
- "not resetting orphans on %s\n",
- obd->obd_name,
- obd_uuid2str(&watched->u.cli.cl_target_uuid));
- /* We still have to fix the lov descriptor for ost's added
- after the mdt in the config log. They didn't make it into
- mds_lov_connect. */
- rc = mds_lov_update_desc(obd, *(__u32 *)data,
- &watched->u.cli.cl_target_uuid);
- } else {
- rc = mds_lov_start_synchronize(obd, watched, data, ev);
- }
- RETURN(rc);
-}
git://git.whamcloud.com / fs / lustre-release.git / commitdiff