1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 * Lustre Metadata Server (mds) handling of striped file data
7 * Copyright (C) 2001-2003 Cluster File Systems, Inc.
8 * Author: Peter Braam <braam@clusterfs.com>
10 * This file is part of Lustre, http://www.lustre.org.
12 * Lustre is free software; you can redistribute it and/or
13 * modify it under the terms of version 2 of the GNU General Public
14 * License as published by the Free Software Foundation.
16 * Lustre is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with Lustre; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 # define EXPORT_SYMTAB
29 #define DEBUG_SUBSYSTEM S_MDS
31 #include <linux/module.h>
32 #include <linux/lustre_mds.h>
33 #include <linux/lustre_idl.h>
34 #include <linux/obd_class.h>
35 #include <linux/obd_lov.h>
36 #include <linux/lustre_lib.h>
37 #include <linux/lustre_fsfilt.h>
39 #include "mds_internal.h"
41 void le_lov_desc_to_cpu (struct lov_desc *ld)
43 ld->ld_tgt_count = le32_to_cpu (ld->ld_tgt_count);
44 ld->ld_default_stripe_count = le32_to_cpu (ld->ld_default_stripe_count);
45 ld->ld_default_stripe_size = le32_to_cpu (ld->ld_default_stripe_size);
46 ld->ld_pattern = le32_to_cpu (ld->ld_pattern);
49 void cpu_to_le_lov_desc (struct lov_desc *ld)
51 ld->ld_tgt_count = cpu_to_le32 (ld->ld_tgt_count);
52 ld->ld_default_stripe_count = cpu_to_le32 (ld->ld_default_stripe_count);
53 ld->ld_default_stripe_size = cpu_to_le32 (ld->ld_default_stripe_size);
54 ld->ld_pattern = cpu_to_le32 (ld->ld_pattern);
57 void mds_lov_update_objids(struct obd_device *obd, obd_id *ids)
59 struct mds_obd *mds = &obd->u.mds;
64 for (i = 0; i < mds->mds_lov_desc.ld_tgt_count; i++)
65 if (ids[i] > (mds->mds_lov_objids)[i])
66 (mds->mds_lov_objids)[i] = ids[i];
71 static int mds_lov_read_objids(struct obd_device *obd)
73 struct mds_obd *mds = &obd->u.mds;
76 int i, rc, size = mds->mds_lov_desc.ld_tgt_count * sizeof(*ids);
79 if (mds->mds_lov_objids != NULL)
85 mds->mds_lov_objids = ids;
87 if (mds->mds_lov_objid_filp->f_dentry->d_inode->i_size == 0)
89 rc = fsfilt_read_record(obd, mds->mds_lov_objid_filp, ids, size, &off);
91 CERROR("Error reading objids %d\n", rc);
93 mds->mds_lov_objids_valid = 1;
97 for (i = 0; i < mds->mds_lov_desc.ld_tgt_count; i++)
98 CDEBUG(D_INFO, "read last object "LPU64" for idx %d\n",
99 mds->mds_lov_objids[i], i);
104 int mds_lov_write_objids(struct obd_device *obd)
106 struct mds_obd *mds = &obd->u.mds;
108 int i, rc, size = mds->mds_lov_desc.ld_tgt_count * sizeof(obd_id);
111 for (i = 0; i < mds->mds_lov_desc.ld_tgt_count; i++)
112 CDEBUG(D_INFO, "writing last object "LPU64" for idx %d\n",
113 mds->mds_lov_objids[i], i);
115 rc = fsfilt_write_record(obd, mds->mds_lov_objid_filp,
116 mds->mds_lov_objids, size, &off, 0);
120 static int mds_lov_clearorphans(struct mds_obd *mds, struct obd_uuid *ost_uuid)
124 struct obd_trans_info oti = {0};
125 struct lov_stripe_md *empty_ea = NULL;
128 LASSERT(mds->mds_lov_objids != NULL);
130 /* This create will in fact either create or destroy: If the OST is
131 * missing objects below this ID, they will be created. If it finds
132 * objects above this ID, they will be removed. */
133 memset(&oa, 0, sizeof(oa));
134 oa.o_valid = OBD_MD_FLFLAGS;
135 oa.o_flags = OBD_FL_DELORPHAN;
136 if (ost_uuid != NULL) {
137 memcpy(&oa.o_inline, ost_uuid, sizeof(*ost_uuid));
138 oa.o_valid |= OBD_MD_FLINLINE;
140 rc = obd_create(mds->mds_osc_exp, &oa, &empty_ea, &oti);
145 /* update the LOV-OSC knowledge of the last used object id's */
146 int mds_lov_set_nextid(struct obd_device *obd)
148 struct mds_obd *mds = &obd->u.mds;
152 LASSERT(!obd->obd_recovering);
154 LASSERT(mds->mds_lov_objids != NULL);
156 rc = obd_set_info(mds->mds_osc_exp, strlen("next_id"), "next_id",
157 mds->mds_lov_desc.ld_tgt_count, mds->mds_lov_objids);
161 rc = mds_lov_clearorphans(mds, NULL /* all OSTs */);
167 /* tell the LOV-OSC by how much to pre-create */
168 int mds_lov_set_growth(struct mds_obd *mds, int count)
173 rc = obd_set_info(mds->mds_osc_exp, strlen("growth_count"),
174 "growth_count", sizeof(count), &count);
179 int mds_lov_connect(struct obd_device *obd, char * lov_name)
181 struct mds_obd *mds = &obd->u.mds;
182 struct lustre_handle conn = {0,};
187 if (IS_ERR(mds->mds_osc_obd))
188 RETURN(PTR_ERR(mds->mds_osc_obd));
190 if (mds->mds_osc_obd)
193 mds->mds_osc_obd = class_name2obd(lov_name);
194 if (!mds->mds_osc_obd) {
195 CERROR("MDS cannot locate LOV %s\n", lov_name);
196 mds->mds_osc_obd = ERR_PTR(-ENOTCONN);
200 rc = obd_connect(&conn, mds->mds_osc_obd, &obd->obd_uuid);
202 CERROR("MDS cannot connect to LOV %s (%d)\n", lov_name, rc);
203 mds->mds_osc_obd = ERR_PTR(rc);
206 mds->mds_osc_exp = class_conn2export(&conn);
208 rc = obd_register_observer(mds->mds_osc_obd, obd);
210 CERROR("MDS cannot register as observer of LOV %s (%d)\n",
212 GOTO(err_discon, rc);
215 valsize = sizeof(mds->mds_lov_desc);
216 rc = obd_get_info(mds->mds_osc_exp, strlen("lovdesc") + 1, "lovdesc",
217 &valsize, &mds->mds_lov_desc);
221 mds->mds_max_mdsize = lov_mds_md_size(mds->mds_lov_desc.ld_tgt_count);
222 mds->mds_max_cookiesize = mds->mds_lov_desc.ld_tgt_count*
223 sizeof(struct llog_cookie);
224 mds->mds_has_lov_desc = 1;
225 rc = mds_lov_read_objids(obd);
227 CERROR("cannot read %s: rc = %d\n", "lov_objids", rc);
231 rc = llog_cat_initialize(obd, mds->mds_lov_desc.ld_tgt_count);
233 CERROR("failed to initialize catalog %d\n", rc);
237 /* FIXME before set info call is made, we must initialize logging */
238 rc = obd_set_info(mds->mds_osc_exp, strlen("mds_conn"), "mds_conn",
243 /* If we're mounting this code for the first time on an existing FS,
244 * we need to populate the objids array from the real OST values */
245 if (!mds->mds_lov_objids_valid) {
246 int size = sizeof(obd_id) * mds->mds_lov_desc.ld_tgt_count;
247 rc = obd_get_info(mds->mds_osc_exp, strlen("last_id"),
248 "last_id", &size, mds->mds_lov_objids);
250 for (i = 0; i < mds->mds_lov_desc.ld_tgt_count; i++)
251 CWARN("got last object "LPU64" from OST %d\n",
252 mds->mds_lov_objids[i], i);
253 mds->mds_lov_objids_valid = 1;
254 rc = mds_lov_write_objids(obd);
256 CERROR("got last objids from OSTs, but error "
257 "writing objids file: %d\n", rc);
261 /* I want to see a callback happen when the OBD moves to a
262 * "For General Use" state, and that's when we'll call
263 * set_nextid(). The class driver can help us here, because
264 * it can use the obd_recovering flag to determine when the
265 * the OBD is full available. */
266 if (!obd->obd_recovering) {
267 rc = llog_connect(llog_get_context(obd, LLOG_UNLINK_ORIG_CTXT),
268 obd->u.mds.mds_lov_desc.ld_tgt_count, NULL,
271 CERROR("faild at llog_origin_connect: %d\n", rc);
273 rc = mds_cleanup_orphans(obd);
275 CERROR("Cleanup %d orphans while MDS isn't recovering\n", rc);
277 rc = mds_lov_set_nextid(obd);
284 /* cleanup all llogging subsystems */
285 rc = obd_llog_finish(obd, mds->mds_lov_desc.ld_tgt_count);
287 CERROR("failed to cleanup llogging subsystems\n");
289 obd_register_observer(mds->mds_osc_obd, NULL);
291 obd_disconnect(mds->mds_osc_exp, 0);
292 mds->mds_osc_exp = NULL;
293 mds->mds_osc_obd = ERR_PTR(rc);
297 int mds_lov_disconnect(struct obd_device *obd, int flags)
299 struct mds_obd *mds = &obd->u.mds;
303 if (!IS_ERR(mds->mds_osc_obd) && mds->mds_osc_exp != NULL) {
304 /* cleanup all llogging subsystems */
305 rc = obd_llog_finish(obd, mds->mds_lov_desc.ld_tgt_count);
307 CERROR("failed to cleanup llogging subsystems\n");
309 obd_register_observer(mds->mds_osc_obd, NULL);
311 rc = obd_disconnect(mds->mds_osc_exp, flags);
312 /* if obd_disconnect fails (probably because the
313 * export was disconnected by class_disconnect_exports)
314 * then we just need to drop our ref. */
316 class_export_put(mds->mds_osc_exp);
317 mds->mds_osc_exp = NULL;
318 mds->mds_osc_obd = NULL;
324 int mds_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
325 void *karg, void *uarg)
327 static struct obd_uuid cfg_uuid = { .uuid = "config_uuid" };
328 struct obd_device *obd = exp->exp_obd;
329 struct mds_obd *mds = &obd->u.mds;
330 struct obd_ioctl_data *data = karg;
331 struct obd_run_ctxt saved;
335 case OBD_IOC_RECORD: {
336 char *name = data->ioc_inlbuf1;
337 if (mds->mds_cfg_llh)
340 push_ctxt(&saved, &obd->obd_ctxt, NULL);
341 rc = llog_create(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT),
342 &mds->mds_cfg_llh, NULL, name);
344 llog_init_handle(mds->mds_cfg_llh, LLOG_F_IS_PLAIN,
347 mds->mds_cfg_llh = NULL;
348 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
353 case OBD_IOC_ENDRECORD: {
354 if (!mds->mds_cfg_llh)
357 push_ctxt(&saved, &obd->obd_ctxt, NULL);
358 rc = llog_close(mds->mds_cfg_llh);
359 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
361 mds->mds_cfg_llh = NULL;
365 case OBD_IOC_CLEAR_LOG: {
366 char *name = data->ioc_inlbuf1;
367 if (mds->mds_cfg_llh)
370 push_ctxt(&saved, &obd->obd_ctxt, NULL);
371 rc = llog_create(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT),
372 &mds->mds_cfg_llh, NULL, name);
374 llog_init_handle(mds->mds_cfg_llh, LLOG_F_IS_PLAIN,
377 rc = llog_destroy(mds->mds_cfg_llh);
378 llog_free_handle(mds->mds_cfg_llh);
380 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
382 mds->mds_cfg_llh = NULL;
386 case OBD_IOC_DORECORD: {
388 struct llog_rec_hdr rec;
389 if (!mds->mds_cfg_llh)
392 rec.lrh_len = llog_data_len(data->ioc_plen1);
394 if (data->ioc_type == LUSTRE_CFG_TYPE) {
395 rec.lrh_type = OBD_CFG_REC;
396 } else if (data->ioc_type == PORTALS_CFG_TYPE) {
397 rec.lrh_type = PTL_CFG_REC;
399 CERROR("unknown cfg record type:%d \n", data->ioc_type);
403 OBD_ALLOC(cfg_buf, data->ioc_plen1);
406 rc = copy_from_user(cfg_buf, data->ioc_pbuf1, data->ioc_plen1);
408 OBD_FREE(cfg_buf, data->ioc_plen1);
412 push_ctxt(&saved, &obd->obd_ctxt, NULL);
413 rc = llog_write_rec(mds->mds_cfg_llh, &rec, NULL, 0,
415 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
417 OBD_FREE(cfg_buf, data->ioc_plen1);
421 case OBD_IOC_PARSE: {
422 struct llog_ctxt *ctxt =
423 llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
424 push_ctxt(&saved, &obd->obd_ctxt, NULL);
425 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
426 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
433 case OBD_IOC_DUMP_LOG: {
434 struct llog_ctxt *ctxt =
435 llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
436 push_ctxt(&saved, &obd->obd_ctxt, NULL);
437 rc = class_config_dump_llog(ctxt, data->ioc_inlbuf1, NULL);
438 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
445 case OBD_IOC_SET_READONLY: {
447 struct inode *inode = obd->u.mds.mds_sb->s_root->d_inode;
448 BDEVNAME_DECLARE_STORAGE(tmp);
449 CERROR("setting device %s read-only\n",
450 ll_bdevname(obd->u.mds.mds_sb, tmp));
452 handle = fsfilt_start(obd, inode, FSFILT_OP_MKNOD, NULL);
454 rc = fsfilt_commit(obd, inode, handle, 1);
456 dev_set_rdonly(ll_sbdev(obd->u.mds.mds_sb), 2);
460 case OBD_IOC_CATLOGLIST: {
461 int count = mds->mds_lov_desc.ld_tgt_count;
462 rc = llog_catlog_list(obd, count, data);
466 case OBD_IOC_LLOG_CHECK:
467 case OBD_IOC_LLOG_CANCEL:
468 case OBD_IOC_LLOG_REMOVE: {
469 struct llog_ctxt *ctxt =
470 llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
473 obd_llog_finish(obd, mds->mds_lov_desc.ld_tgt_count);
474 push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
475 rc = llog_ioctl(ctxt, cmd, data);
476 pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
477 llog_cat_initialize(obd, mds->mds_lov_desc.ld_tgt_count);
478 rc2 = obd_set_info(mds->mds_osc_exp, strlen("mds_conn"), "mds_conn",
484 case OBD_IOC_LLOG_INFO:
485 case OBD_IOC_LLOG_PRINT: {
486 struct llog_ctxt *ctxt =
487 llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
489 push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
490 rc = llog_ioctl(ctxt, cmd, data);
491 pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
496 case OBD_IOC_ABORT_RECOVERY:
497 CERROR("aborting recovery for device %s\n", obd->obd_name);
498 target_abort_recovery(obd);
507 int mds_notify(struct obd_device *obd, struct obd_device *watched, int active)
509 struct obd_uuid *uuid;
516 if (strcmp(watched->obd_type->typ_name, "osc")) {
517 CERROR("unexpected notification of %s %s!\n",
518 watched->obd_type->typ_name, watched->obd_name);
522 uuid = &watched->u.cli.cl_import->imp_target_uuid;
523 if (obd->obd_recovering) {
524 CWARN("MDS %s: in recovery, not resetting orphans on %s\n",
525 obd->obd_name, uuid->uuid);
527 LASSERT(llog_get_context(obd, LLOG_UNLINK_ORIG_CTXT) != NULL);
529 rc = obd_set_info(obd->u.mds.mds_osc_exp, strlen("mds_conn"), "mds_conn",
534 rc = llog_connect(llog_get_context(obd, LLOG_UNLINK_ORIG_CTXT),
535 obd->u.mds.mds_lov_desc.ld_tgt_count,
538 CERROR("faild at llog_origin_connect: %d\n", rc);
542 CWARN("MDS %s: %s now active, resetting orphans\n",
543 obd->obd_name, uuid->uuid);
544 rc = mds_lov_clearorphans(&obd->u.mds, uuid);
549 /* Convert the on-disk LOV EA structre.
550 * We always try to convert from an old LOV EA format to the common in-memory
551 * (lsm) format (obd_unpackmd() understands the old on-disk (lmm) format) and
552 * then convert back to the new on-disk format and save it back to disk
553 * (obd_packmd() only ever saves to the new on-disk format) so we don't have
554 * to convert it each time this inode is accessed.
556 * This function is a bit interesting in the error handling. We can safely
557 * ship the old lmm to the client in case of failure, since it uses the same
558 * obd_unpackmd() code and can do the conversion if the MDS fails for some
559 * reason. We will not delete the old lmm data until we have written the
560 * new format lmm data in fsfilt_set_md(). */
561 int mds_convert_lov_ea(struct obd_device *obd, struct inode *inode,
562 struct lov_mds_md *lmm, int lmm_size)
564 struct lov_stripe_md *lsm = NULL;
569 if (le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC)
572 CDEBUG(D_INODE, "converting LOV EA on %lu/%u from V0 to V1\n",
573 inode->i_ino, inode->i_generation);
574 rc = obd_unpackmd(obd->u.mds.mds_osc_exp, &lsm, lmm, lmm_size);
578 rc = obd_packmd(obd->u.mds.mds_osc_exp, &lmm, lsm);
583 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
584 if (IS_ERR(handle)) {
585 rc = PTR_ERR(handle);
589 rc = fsfilt_set_md(obd, inode, handle, lmm, lmm_size);
591 err = fsfilt_commit(obd, inode, handle, 0);
593 rc = err ? err : lmm_size;
596 obd_free_memmd(obd->u.mds.mds_osc_exp, &lsm);