1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/mds/mds_lov.c
38 * Lustre Metadata Server (mds) handling of striped file data
40 * Author: Peter Braam <braam@clusterfs.com>
43 #define DEBUG_SUBSYSTEM S_MDS
45 #include <linux/module.h>
46 #include <lustre_mds.h>
47 #include <lustre/lustre_idl.h>
48 #include <obd_class.h>
50 #include <lustre_lib.h>
51 #include <lustre_fsfilt.h>
52 #include <obd_cksum.h>
54 #include "mds_internal.h"
56 static void mds_lov_dump_objids(const char *label, struct obd_device *obd)
58 struct mds_obd *mds = &obd->u.mds;
61 CDEBUG(D_INFO, "dump from %s\n", label);
62 if (mds->mds_lov_page_dirty == NULL) {
63 CERROR("NULL bitmap!\n");
67 for(i = 0; i < mds->mds_lov_page_dirty->size / BITS_PER_LONG + 1; i++)
68 CDEBUG(D_INFO, "%u - %lx\n", i,
69 mds->mds_lov_page_dirty->data[i]);
71 if (mds->mds_lov_page_array == NULL) {
72 CERROR("not init page array!\n");
76 for(i = 0;i < MDS_LOV_OBJID_PAGES_COUNT; i++) {
77 obd_id *data = mds->mds_lov_page_array[i];
82 for(j=0; j < OBJID_PER_PAGE(); j++) {
85 CDEBUG(D_INFO,"objid page %u idx %u - "LPU64" \n",
93 int mds_lov_init_objids(struct obd_device *obd)
95 struct mds_obd *mds = &obd->u.mds;
96 int size = MDS_LOV_OBJID_PAGES_COUNT*sizeof(void *);
101 CLASSERT(((MDS_LOV_ALLOC_SIZE % sizeof(obd_id)) == 0));
103 mds->mds_lov_page_dirty =
104 CFS_ALLOCATE_BITMAP(MDS_LOV_OBJID_PAGES_COUNT);
105 if (mds->mds_lov_page_dirty == NULL)
109 OBD_ALLOC(mds->mds_lov_page_array, size);
110 if (mds->mds_lov_page_array == NULL)
111 GOTO(err_free_bitmap, rc = -ENOMEM);
113 /* open and test the lov objd file */
114 file = filp_open(LOV_OBJID, O_RDWR | O_CREAT, 0644);
117 CERROR("cannot open/create %s file: rc = %d\n", LOV_OBJID, rc);
118 GOTO(err_free, rc = PTR_ERR(file));
120 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
121 CERROR("%s is not a regular file!: mode = %o\n", LOV_OBJID,
122 file->f_dentry->d_inode->i_mode);
123 GOTO(err_open, rc = -ENOENT);
125 mds->mds_lov_objid_filp = file;
129 if (filp_close((struct file *)file, 0))
130 CERROR("can't close %s after error\n", LOV_OBJID);
132 OBD_FREE(mds->mds_lov_page_array, size);
134 CFS_FREE_BITMAP(mds->mds_lov_page_dirty);
139 void mds_lov_destroy_objids(struct obd_device *obd)
141 struct mds_obd *mds = &obd->u.mds;
145 if (mds->mds_lov_page_array != NULL) {
146 for(i=0;i<MDS_LOV_OBJID_PAGES_COUNT;i++) {
147 obd_id *data = mds->mds_lov_page_array[i];
149 OBD_FREE(data, MDS_LOV_ALLOC_SIZE);
151 OBD_FREE(mds->mds_lov_page_array,
152 MDS_LOV_OBJID_PAGES_COUNT*sizeof(void *));
155 if (mds->mds_lov_objid_filp) {
156 rc = filp_close((struct file *)mds->mds_lov_objid_filp, NULL);
157 mds->mds_lov_objid_filp = NULL;
159 CERROR("%s file won't close, rc=%d\n", LOV_OBJID, rc);
162 CFS_FREE_BITMAP(mds->mds_lov_page_dirty);
167 * currently exist two ways for know about ost count and max ost index.
168 * first - after ost is connected to mds and sync process finished
169 * second - get from lmm in recovery process, in case when mds not have configs,
170 * and ost isn't registered in mgs.
172 * \param mds pointer to mds structure
173 * \param index maxium ost index
175 * \retval -ENOMEM is not hame memory for new page
176 * \retval 0 is update passed
178 static int mds_lov_update_max_ost(struct mds_obd *mds, obd_id index)
180 __u32 page = index / OBJID_PER_PAGE();
181 __u32 off = index % OBJID_PER_PAGE();
182 obd_id *data = mds->mds_lov_page_array[page];
185 OBD_ALLOC(data, MDS_LOV_ALLOC_SIZE);
189 mds->mds_lov_page_array[page] = data;
192 if (index > mds->mds_lov_objid_max_index) {
193 mds->mds_lov_objid_lastpage = page;
194 mds->mds_lov_objid_lastidx = off;
195 mds->mds_lov_objid_max_index = index;
198 /* workaround - New target not in objids file; increase mdsize */
199 /* ld_tgt_count is used as the max index everywhere, despite its name. */
200 if (data[off] == 0) {
204 mds->mds_lov_objid_count++;
205 stripes = min_t(__u32, LOV_MAX_STRIPE_COUNT,
206 mds->mds_lov_objid_count);
208 mds->mds_max_mdsize = lov_mds_md_size(stripes, LOV_MAGIC_V3);
209 mds->mds_max_cookiesize = stripes * sizeof(struct llog_cookie);
211 CDEBUG(D_CONFIG, "updated max_mdsize/max_cookiesize for %d"
212 " stripes: %d/%d\n", stripes, mds->mds_max_mdsize,
213 mds->mds_max_cookiesize);
220 int mds_lov_prepare_objids(struct obd_device *obd, struct lov_mds_md *lmm)
222 struct lov_ost_data_v1 *data;
227 /* if we create file without objects - lmm is NULL */
231 switch (le32_to_cpu(lmm->lmm_magic)) {
233 count = le32_to_cpu(((struct lov_mds_md_v1*)lmm)->lmm_stripe_count);
234 data = &(((struct lov_mds_md_v1*)lmm)->lmm_objects[0]);
237 count = le32_to_cpu(((struct lov_mds_md_v3*)lmm)->lmm_stripe_count);
238 data = &(((struct lov_mds_md_v3*)lmm)->lmm_objects[0]);
241 CERROR("Unknow lmm type %X!\n", le32_to_cpu(lmm->lmm_magic));
246 cfs_mutex_down(&obd->obd_dev_sem);
247 for (j = 0; j < count; j++) {
248 __u32 i = le32_to_cpu(data[j].l_ost_idx);
249 if (mds_lov_update_max_ost(&obd->u.mds, i)) {
254 cfs_mutex_up(&obd->obd_dev_sem);
258 EXPORT_SYMBOL(mds_lov_prepare_objids);
261 * write llog orphan record about lost ost object,
262 * Special lsm is allocated with single stripe, caller should deallocated it
265 static int mds_log_lost_precreated(struct obd_device *obd,
266 struct lov_stripe_md **lsmp, int *stripes,
267 obd_id id, obd_count count, int idx)
269 struct lov_stripe_md *lsm = *lsmp;
274 rc = obd_alloc_memmd(obd->u.mds.mds_lov_exp, &lsm);
277 /* need only one stripe, save old value */
278 *stripes = lsm->lsm_stripe_count;
279 lsm->lsm_stripe_count = 1;
283 lsm->lsm_oinfo[0]->loi_id = id;
284 lsm->lsm_oinfo[0]->loi_seq = mdt_to_obd_objseq(obd->u.mds.mds_id);
285 lsm->lsm_oinfo[0]->loi_ost_idx = idx;
287 rc = mds_log_op_orphan(obd, lsm, count);
291 void mds_lov_update_objids(struct obd_device *obd, struct lov_mds_md *lmm)
293 struct mds_obd *mds = &obd->u.mds;
295 struct lov_ost_data_v1 *obj;
296 struct lov_stripe_md *lsm = NULL;
301 /* if we create file without objects - lmm is NULL */
305 switch (le32_to_cpu(lmm->lmm_magic)) {
307 count = le32_to_cpu(((struct lov_mds_md_v1*)lmm)->lmm_stripe_count);
308 obj = ((struct lov_mds_md_v1*)lmm)->lmm_objects;
311 count = le32_to_cpu(((struct lov_mds_md_v3*)lmm)->lmm_stripe_count);
312 obj = ((struct lov_mds_md_v3*)lmm)->lmm_objects;
315 CERROR("Unknow lmm type %X !\n",
316 le32_to_cpu(lmm->lmm_magic));
320 for (j = 0; j < count; j++) {
321 __u32 i = le32_to_cpu(obj[j].l_ost_idx);
322 obd_id id = le64_to_cpu(obj[j].l_object_id);
323 __u32 page = i / OBJID_PER_PAGE();
324 __u32 idx = i % OBJID_PER_PAGE();
327 data = mds->mds_lov_page_array[page];
329 CDEBUG(D_INODE,"update last object for ost %u"
330 " - new "LPU64" old "LPU64"\n", i, id, data[idx]);
331 if (id > data[idx]) {
332 int lost = id - data[idx] - 1;
333 /* we might have lost precreated objects due to VBR */
334 if (lost > 0 && obd->obd_recovering) {
335 CDEBUG(D_HA, "Gap in objids is %u\n", lost);
336 if (!obd->obd_version_recov)
337 CERROR("Unexpected gap in objids\n");
338 /* lsm is allocated if NULL */
339 mds_log_lost_precreated(obd, &lsm, &stripes,
340 data[idx]+1, lost, i);
343 cfs_bitmap_set(mds->mds_lov_page_dirty, page);
347 /* restore stripes number */
348 lsm->lsm_stripe_count = stripes;
349 obd_free_memmd(mds->mds_lov_exp, &lsm);
354 EXPORT_SYMBOL(mds_lov_update_objids);
356 static int mds_lov_update_from_read(struct mds_obd *mds, obd_id *data,
362 for (i = 0; i < count; i++) {
366 mds->mds_lov_objid_count++;
369 stripes = min_t(__u32, LOV_MAX_STRIPE_COUNT,
370 mds->mds_lov_objid_count);
372 mds->mds_max_mdsize = lov_mds_md_size(stripes, LOV_MAGIC_V3);
373 mds->mds_max_cookiesize = stripes * sizeof(struct llog_cookie);
375 CDEBUG(D_CONFIG, "updated max_mdsize/max_cookiesize for %d stripes: "
376 "%d/%d\n", stripes, mds->mds_max_mdsize,
377 mds->mds_max_cookiesize);
383 static int mds_lov_read_objids(struct obd_device *obd)
385 struct mds_obd *mds = &obd->u.mds;
387 int i, rc = 0, count = 0, page = 0;
391 /* Read everything in the file, even if our current lov desc
392 has fewer targets. Old targets not in the lov descriptor
393 during mds setup may still have valid objids. */
394 size = i_size_read(mds->mds_lov_objid_filp->f_dentry->d_inode);
398 page = (size / (OBJID_PER_PAGE() * sizeof(obd_id))) + 1;
399 CDEBUG(D_INFO, "file size %lu pages %d\n", size, page);
400 for (i = 0; i < page; i++) {
402 loff_t off_old = off;
404 LASSERT(mds->mds_lov_page_array[i] == NULL);
405 OBD_ALLOC(mds->mds_lov_page_array[i], MDS_LOV_ALLOC_SIZE);
406 if (mds->mds_lov_page_array[i] == NULL)
407 GOTO(out, rc = -ENOMEM);
409 data = mds->mds_lov_page_array[i];
411 rc = fsfilt_read_record(obd, mds->mds_lov_objid_filp, data,
412 OBJID_PER_PAGE()*sizeof(obd_id), &off);
414 CERROR("Error reading objids %d\n", rc);
418 count += (off - off_old) / sizeof(obd_id);
419 if (mds_lov_update_from_read(mds, data, count)) {
420 CERROR("Can't update mds data\n");
421 GOTO(out, rc = -EIO);
427 mds->mds_lov_objid_lastpage = i;
428 mds->mds_lov_objid_lastidx = count % OBJID_PER_PAGE();
430 CDEBUG(D_INFO, "Read %u - %u %u objid\n", mds->mds_lov_objid_count,
431 mds->mds_lov_objid_lastpage, mds->mds_lov_objid_lastidx);
433 mds_lov_dump_objids("read",obd);
438 int mds_lov_write_objids(struct obd_device *obd)
440 struct mds_obd *mds = &obd->u.mds;
444 if (cfs_bitmap_check_empty(mds->mds_lov_page_dirty))
447 mds_lov_dump_objids("write", obd);
449 cfs_foreach_bit(mds->mds_lov_page_dirty, i) {
450 obd_id *data = mds->mds_lov_page_array[i];
451 unsigned int size = OBJID_PER_PAGE()*sizeof(obd_id);
452 loff_t off = i * size;
454 LASSERT(data != NULL);
456 if (!cfs_bitmap_test_and_clear(mds->mds_lov_page_dirty, i))
459 /* check for particaly filled last page */
460 if (i == mds->mds_lov_objid_lastpage)
461 size = (mds->mds_lov_objid_lastidx+1) * sizeof(obd_id);
463 CDEBUG(D_INFO, "write %lld - %u\n", off, size);
464 rc = fsfilt_write_record(obd, mds->mds_lov_objid_filp, data,
467 cfs_bitmap_set(mds->mds_lov_page_dirty, i);
476 EXPORT_SYMBOL(mds_lov_write_objids);
478 static int mds_lov_get_objid(struct obd_device * obd,
481 struct mds_obd *mds = &obd->u.mds;
482 struct obd_export *lov_exp = mds->mds_lov_exp;
491 page = idx / OBJID_PER_PAGE();
492 off = idx % OBJID_PER_PAGE();
493 data = mds->mds_lov_page_array[page];
495 size = sizeof(__u64);
497 rc = obd_get_info(lov_exp, sizeof(KEY_CONNECT_FLAG), KEY_CONNECT_FLAG,
498 &size, &connect_flags, NULL);
502 if (data[off] < 2 || connect_flags & OBD_CONNECT_SKIP_ORPHAN) {
503 /* We never read this lastid; ask the osc */
504 struct obd_id_info lastid;
506 size = sizeof(lastid);
508 lastid.data = &data[off];
509 rc = obd_get_info(lov_exp, sizeof(KEY_LAST_ID), KEY_LAST_ID,
510 &size, &lastid, NULL);
514 /* workaround for clean filter */
518 cfs_bitmap_set(mds->mds_lov_page_dirty, page);
520 CDEBUG(D_INFO, "idx "LPU64" - %p - %d/%d - "LPU64"\n",
521 idx, data, page, off, data[off]);
526 int mds_lov_clear_orphans(struct mds_obd *mds, struct obd_uuid *ost_uuid)
529 struct obdo oa = { 0 };
530 struct obd_trans_info oti = {0};
531 struct lov_stripe_md *empty_ea = NULL;
534 LASSERT(mds->mds_lov_page_array != NULL);
536 /* This create will in fact either create or destroy: If the OST is
537 * missing objects below this ID, they will be created. If it finds
538 * objects above this ID, they will be removed. */
539 memset(&oa, 0, sizeof(oa));
540 oa.o_flags = OBD_FL_DELORPHAN;
541 oa.o_seq = mdt_to_obd_objseq(mds->mds_id);
542 oa.o_valid = OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
543 if (ost_uuid != NULL)
544 oti.oti_ost_uuid = ost_uuid;
546 rc = obd_create(mds->mds_lov_exp, &oa, &empty_ea, &oti);
552 static int mds_lov_set_one_nextid(struct obd_device *obd, __u32 idx, obd_id *id)
554 struct mds_obd *mds = &obd->u.mds;
556 struct obd_id_info info;
559 LASSERT(!obd->obd_recovering);
563 rc = obd_set_info_async(mds->mds_lov_exp, sizeof(KEY_NEXT_ID),
564 KEY_NEXT_ID, sizeof(info), &info, NULL);
566 CERROR ("%s: mds_lov_set_nextid failed (%d)\n",
572 /* Update the lov desc for a new size lov. */
573 static int mds_lov_update_desc(struct obd_device *obd, int idx,
574 struct obd_uuid *uuid, enum obd_notify_event ev)
576 struct mds_obd *mds = &obd->u.mds;
578 __u32 valsize = sizeof(mds->mds_lov_desc);
582 OBD_ALLOC(ld, sizeof(*ld));
586 rc = obd_get_info(mds->mds_lov_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC,
591 /* Don't change the mds_lov_desc until the objids size matches the
593 mds->mds_lov_desc = *ld;
594 CDEBUG(D_CONFIG, "updated lov_desc, tgt_count: %d - idx %d / uuid %s\n",
595 mds->mds_lov_desc.ld_tgt_count, idx, uuid->uuid);
597 cfs_mutex_down(&obd->obd_dev_sem);
598 rc = mds_lov_update_max_ost(mds, idx);
599 cfs_mutex_up(&obd->obd_dev_sem);
603 /* If we added a target we have to reconnect the llogs */
604 /* We only _need_ to do this at first add (idx), or the first time
605 after recovery. However, it should now be safe to call anytime. */
606 rc = obd_llog_init(obd, &obd->obd_olg, obd, &idx);
610 /*XXX this notifies the MDD until lov handling use old mds code */
611 if (obd->obd_upcall.onu_owner) {
612 LASSERT(obd->obd_upcall.onu_upcall != NULL);
613 rc = obd->obd_upcall.onu_upcall(obd, NULL, ev,
614 obd->obd_upcall.onu_owner,
615 &mds->mds_obt.obt_mount_count);
618 OBD_FREE(ld, sizeof(*ld));
622 /* Inform MDS about new/updated target */
623 static int mds_lov_update_mds(struct obd_device *obd,
624 struct obd_device *watched,
625 __u32 idx, enum obd_notify_event ev)
627 struct mds_obd *mds = &obd->u.mds;
635 /* Don't let anyone else mess with mds_lov_objids now */
636 rc = mds_lov_update_desc(obd, idx, &watched->u.cli.cl_target_uuid, ev);
640 CDEBUG(D_CONFIG, "idx=%d, recov=%d/%d, cnt=%d\n",
641 idx, obd->obd_recovering, obd->obd_async_recov,
642 mds->mds_lov_desc.ld_tgt_count);
644 /* idx is set as data from lov_notify. */
645 if (obd->obd_recovering)
648 if (idx >= mds->mds_lov_desc.ld_tgt_count) {
649 CERROR("index %d > count %d!\n", idx,
650 mds->mds_lov_desc.ld_tgt_count);
651 GOTO(out, rc = -EINVAL);
654 rc = mds_lov_get_objid(obd, idx);
658 page = idx / OBJID_PER_PAGE();
659 off = idx % OBJID_PER_PAGE();
660 data = mds->mds_lov_page_array[page];
662 /* We have read this lastid from disk; tell the osc.
663 Don't call this during recovery. */
664 rc = mds_lov_set_one_nextid(obd, idx, &data[off]);
666 CERROR("Failed to set next id, idx=%d rc=%d\n", idx,rc);
667 /* Don't abort the rest of the sync */
670 CDEBUG(D_CONFIG, "last object "LPU64" from OST %d rc=%d\n",
677 /* update the LOV-OSC knowledge of the last used object id's */
678 int mds_lov_connect(struct obd_device *obd, char * lov_name)
680 struct mds_obd *mds = &obd->u.mds;
681 struct obd_connect_data *data;
685 if (IS_ERR(mds->mds_lov_obd))
686 RETURN(PTR_ERR(mds->mds_lov_obd));
688 if (mds->mds_lov_obd)
691 mds->mds_lov_obd = class_name2obd(lov_name);
692 if (!mds->mds_lov_obd) {
693 CERROR("MDS cannot locate LOV %s\n", lov_name);
694 mds->mds_lov_obd = ERR_PTR(-ENOTCONN);
698 cfs_mutex_down(&obd->obd_dev_sem);
699 rc = mds_lov_read_objids(obd);
700 cfs_mutex_up(&obd->obd_dev_sem);
702 CERROR("cannot read %s: rc = %d\n", "lov_objids", rc);
706 rc = obd_register_observer(mds->mds_lov_obd, obd);
708 CERROR("MDS cannot register as observer of LOV %s (%d)\n",
713 /* try init too early */
714 rc = obd_llog_init(obd, &obd->obd_olg, obd, NULL);
718 mds->mds_lov_obd->u.lov.lov_sp_me = LUSTRE_SP_MDT;
720 OBD_ALLOC(data, sizeof(*data));
722 GOTO(err_exit, rc = -ENOMEM);
724 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX |
725 OBD_CONNECT_REQPORTAL | OBD_CONNECT_QUOTA64 |
726 OBD_CONNECT_OSS_CAPA | OBD_CONNECT_FID |
727 OBD_CONNECT_BRW_SIZE | OBD_CONNECT_CKSUM |
728 OBD_CONNECT_CHANGE_QS | OBD_CONNECT_AT |
729 OBD_CONNECT_MDS | OBD_CONNECT_SKIP_ORPHAN |
731 #ifdef HAVE_LRU_RESIZE_SUPPORT
732 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
734 data->ocd_version = LUSTRE_VERSION_CODE;
735 data->ocd_group = mdt_to_obd_objseq(mds->mds_id);
736 /* send max bytes per rpc */
737 data->ocd_brw_size = PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT;
738 /* send the list of supported checksum types */
739 data->ocd_cksum_types = OBD_CKSUM_ALL;
740 /* NB: lov_connect() needs to fill in .ocd_index for each OST */
741 rc = obd_connect(NULL, &mds->mds_lov_exp, mds->mds_lov_obd, &obd->obd_uuid, data, NULL);
742 OBD_FREE(data, sizeof(*data));
744 CERROR("MDS cannot connect to LOV %s (%d)\n", lov_name, rc);
745 mds->mds_lov_obd = ERR_PTR(rc);
749 /* I want to see a callback happen when the OBD moves to a
750 * "For General Use" state, and that's when we'll call
751 * set_nextid(). The class driver can help us here, because
752 * it can use the obd_recovering flag to determine when the
753 * the OBD is full available. */
754 /* MDD device will care about that
755 if (!obd->obd_recovering)
756 rc = mds_postrecov(obd);
761 mds->mds_lov_exp = NULL;
762 mds->mds_lov_obd = ERR_PTR(rc);
766 int mds_lov_disconnect(struct obd_device *obd)
768 struct mds_obd *mds = &obd->u.mds;
772 if (!IS_ERR(mds->mds_lov_obd) && mds->mds_lov_exp != NULL) {
773 obd_register_observer(mds->mds_lov_obd, NULL);
775 /* The actual disconnect of the mds_lov will be called from
776 * class_disconnect_exports from mds_lov_clean. So we have to
777 * ensure that class_cleanup doesn't fail due to the extra ref
778 * we're holding now. The mechanism to do that already exists -
779 * the obd_force flag. We'll drop the final ref to the
780 * mds_lov_exp in mds_cleanup. */
781 mds->mds_lov_obd->obd_force = 1;
787 struct mds_lov_sync_info {
788 struct obd_device *mlsi_obd; /* the lov device to sync */
789 struct obd_device *mlsi_watched; /* target osc */
790 __u32 mlsi_index; /* index of target */
791 enum obd_notify_event mlsi_ev; /* event type */
794 static int mds_propagate_capa_keys(struct mds_obd *mds, struct obd_uuid *uuid)
796 struct mds_capa_info info = { .uuid = uuid };
797 struct lustre_capa_key *key;
802 if (!mds->mds_capa_keys)
805 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_SYNC_CAPA_SL, 5);
806 for (i = 0; i < 2; i++) {
807 key = &mds->mds_capa_keys[i];
808 DEBUG_CAPA_KEY(D_SEC, key, "propagate");
811 rc = obd_set_info_async(mds->mds_lov_exp, sizeof(KEY_CAPA_KEY),
812 KEY_CAPA_KEY, sizeof(info), &info, NULL);
814 DEBUG_CAPA_KEY(D_ERROR, key,
815 "propagate failed (rc = %d) for", rc);
823 /* We only sync one osc at a time, so that we don't have to hold
824 any kind of lock on the whole mds_lov_desc, which may change
825 (grow) as a result of mds_lov_add_ost. This also avoids any
826 kind of mismatch between the lov_desc and the mds_lov_desc,
827 which are not in lock-step during lov_add_obd */
828 static int __mds_lov_synchronize(void *data)
830 struct mds_lov_sync_info *mlsi = data;
831 struct obd_device *obd = mlsi->mlsi_obd;
832 struct obd_device *watched = mlsi->mlsi_watched;
833 struct mds_obd *mds = &obd->u.mds;
834 struct obd_uuid *uuid;
835 __u32 idx = mlsi->mlsi_index;
836 enum obd_notify_event ev = mlsi->mlsi_ev;
837 struct mds_group_info mgi;
838 struct llog_ctxt *ctxt;
846 uuid = &watched->u.cli.cl_target_uuid;
849 cfs_down_read(&mds->mds_notify_lock);
850 if (obd->obd_stopping || obd->obd_fail)
851 GOTO(out, rc = -ENODEV);
853 OBD_RACE(OBD_FAIL_MDS_LOV_SYNC_RACE);
854 rc = mds_lov_update_mds(obd, watched, idx, ev);
856 CERROR("%s failed at update_mds: %d\n", obd_uuid2str(uuid), rc);
859 mgi.group = mdt_to_obd_objseq(mds->mds_id);
862 rc = obd_set_info_async(mds->mds_lov_exp, sizeof(KEY_MDS_CONN),
863 KEY_MDS_CONN, sizeof(mgi), &mgi, NULL);
866 /* propagate capability keys */
867 rc = mds_propagate_capa_keys(mds, uuid);
871 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
873 GOTO(out, rc = -ENODEV);
875 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_LLOG_SYNC_TIMEOUT, 60);
876 rc = llog_connect(ctxt, NULL, NULL, uuid);
879 CERROR("%s failed at llog_origin_connect: %d\n",
880 obd_uuid2str(uuid), rc);
884 LCONSOLE_INFO("MDS %s: %s now active, resetting orphans\n",
885 obd->obd_name, obd_uuid2str(uuid));
886 rc = mds_lov_clear_orphans(mds, uuid);
888 CERROR("%s failed at mds_lov_clear_orphans: %d\n",
889 obd_uuid2str(uuid), rc);
893 #ifdef HAVE_QUOTA_SUPPORT
894 if (obd->obd_upcall.onu_owner) {
896 * This is a hack for mds_notify->mdd_notify. When the mds obd
897 * in mdd is removed, This hack should be removed.
899 LASSERT(obd->obd_upcall.onu_upcall != NULL);
900 rc = obd->obd_upcall.onu_upcall(obd, NULL, OBD_NOTIFY_QUOTA,
901 obd->obd_upcall.onu_owner,NULL);
906 cfs_up_read(&mds->mds_notify_lock);
908 /* Deactivate it for safety */
909 CERROR("%s sync failed %d, deactivating\n", obd_uuid2str(uuid),
911 if (!obd->obd_stopping && mds->mds_lov_obd &&
912 !mds->mds_lov_obd->obd_stopping && !watched->obd_stopping)
913 obd_notify(mds->mds_lov_obd, watched,
914 OBD_NOTIFY_INACTIVE, NULL);
917 class_decref(obd, "mds_lov_synchronize", obd);
921 int mds_lov_synchronize(void *data)
923 struct mds_lov_sync_info *mlsi = data;
926 snprintf(name, sizeof(name), "ll_sync_%02u", mlsi->mlsi_index);
927 cfs_daemonize_ctxt(name);
929 RETURN(__mds_lov_synchronize(data));
932 int mds_lov_start_synchronize(struct obd_device *obd,
933 struct obd_device *watched,
934 void *data, enum obd_notify_event ev)
936 struct mds_lov_sync_info *mlsi;
938 struct obd_uuid *uuid;
942 uuid = &watched->u.cli.cl_target_uuid;
944 OBD_ALLOC(mlsi, sizeof(*mlsi));
949 mlsi->mlsi_obd = obd;
950 mlsi->mlsi_watched = watched;
951 mlsi->mlsi_index = *(__u32 *)data;
954 /* Although class_export_get(obd->obd_self_export) would lock
955 the MDS in place, since it's only a self-export
956 it doesn't lock the LOV in place. The LOV can be disconnected
957 during MDS precleanup, leaving nothing for __mds_lov_synchronize.
958 Simply taking an export ref on the LOV doesn't help, because it's
959 still disconnected. Taking an obd reference insures that we don't
960 disconnect the LOV. This of course means a cleanup won't
961 finish for as long as the sync is blocking. */
962 class_incref(obd, "mds_lov_synchronize", obd);
964 if (ev != OBD_NOTIFY_SYNC) {
965 /* Synchronize in the background */
966 rc = cfs_kernel_thread(mds_lov_synchronize, mlsi,
967 CLONE_VM | CLONE_FILES);
969 CERROR("%s: error starting mds_lov_synchronize: %d\n",
971 class_decref(obd, "mds_lov_synchronize", obd);
973 CDEBUG(D_HA, "%s: mds_lov_synchronize idx=%d "
974 "thread=%d\n", obd->obd_name,
975 mlsi->mlsi_index, rc);
979 rc = __mds_lov_synchronize((void *)mlsi);
985 int mds_notify(struct obd_device *obd, struct obd_device *watched,
986 enum obd_notify_event ev, void *data)
991 CDEBUG(D_CONFIG, "notify %s ev=%d\n", watched->obd_name, ev);
994 /* We only handle these: */
995 case OBD_NOTIFY_ACTIVE:
996 /* lov want one or more _active_ targets for work */
997 /* activate event should be pass lov idx as argument */
998 case OBD_NOTIFY_SYNC:
999 case OBD_NOTIFY_SYNC_NONBLOCK:
1000 /* sync event should be pass lov idx as argument */
1006 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME) != 0) {
1007 CERROR("unexpected notification of %s %s!\n",
1008 watched->obd_type->typ_name, watched->obd_name);
1012 if (obd->obd_recovering) {
1013 CWARN("MDS %s: in recovery, not resetting orphans on %s\n",
1015 obd_uuid2str(&watched->u.cli.cl_target_uuid));
1016 /* We still have to fix the lov descriptor for ost's added
1017 after the mdt in the config log. They didn't make it into
1019 rc = mds_lov_update_desc(obd, *(__u32 *)data,
1020 &watched->u.cli.cl_target_uuid, ev);
1022 rc = mds_lov_start_synchronize(obd, watched, data, ev);