1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * linux/fs/obdfilter/filter.c
6 * Copyright (c) 2001-2003 Cluster File Systems, Inc.
7 * Author: Peter Braam <braam@clusterfs.com>
8 * Author: Andreas Dilger <adilger@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 * Invariant: Get O/R i_sem for lookup, if needed, before any journal ops
28 * (which need to get journal_lock, may block if journal full).
30 * Invariant: Call filter_start_transno() before any journal ops to avoid the
31 * same deadlock problem. We can (and want) to get rid of the
32 * transno sem in favour of the dir/inode i_sem to avoid single
33 * threaded operation on the OST.
36 #define DEBUG_SUBSYSTEM S_FILTER
38 #include <linux/config.h>
39 #include <linux/module.h>
41 #include <linux/dcache.h>
42 #include <linux/init.h>
43 #include <linux/version.h>
44 #include <linux/jbd.h>
45 #include <linux/ext3_fs.h>
46 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
47 # include <linux/mount.h>
48 # include <linux/buffer_head.h>
49 # include <linux/bio.h>
52 #include <linux/obd_class.h>
53 #include <linux/obd_lov.h>
54 #include <linux/obd_ost.h>
55 #include <linux/lustre_dlm.h>
56 #include <linux/lustre_fsfilt.h>
57 #include <linux/lprocfs_status.h>
58 #include <linux/lustre_log.h>
59 #include <linux/lustre_commit_confd.h>
60 #include <libcfs/list.h>
62 #include <linux/lustre_smfs.h>
63 #include "filter_internal.h"
65 /* Group 0 is no longer a legal group, to catch uninitialized IDs */
66 #define FILTER_MIN_GROUPS 3
68 static struct lvfs_callback_ops filter_lvfs_ops;
70 static int filter_destroy(struct obd_export *exp, struct obdo *oa,
71 struct lov_stripe_md *ea, struct obd_trans_info *);
72 struct obd_llogs *filter_grab_llog_for_group(struct obd_device *,
73 int, struct obd_export *);
75 static void filter_commit_cb(struct obd_device *obd, __u64 transno,
76 void *cb_data, int error)
78 obd_transno_commit_cb(obd, transno, error);
81 /* Assumes caller has already pushed us into the kernel context. */
82 int filter_finish_transno(struct obd_export *exp, struct obd_trans_info *oti,
85 struct filter_obd *filter = &exp->exp_obd->u.filter;
86 struct filter_export_data *fed = &exp->exp_filter_data;
87 struct filter_client_data *fcd = fed->fed_fcd;
90 int err, log_pri = D_HA;
92 /* Propagate error code. */
96 if (!exp->exp_obd->obd_replayable || oti == NULL)
99 /* we don't allocate new transnos for replayed requests */
100 if (oti->oti_transno == 0) {
101 spin_lock(&filter->fo_translock);
102 last_rcvd = le64_to_cpu(filter->fo_fsd->fsd_last_transno) + 1;
103 filter->fo_fsd->fsd_last_transno = cpu_to_le64(last_rcvd);
104 spin_unlock(&filter->fo_translock);
105 oti->oti_transno = last_rcvd;
107 spin_lock(&filter->fo_translock);
108 last_rcvd = oti->oti_transno;
109 if (last_rcvd > le64_to_cpu(filter->fo_fsd->fsd_last_transno))
110 filter->fo_fsd->fsd_last_transno =
111 cpu_to_le64(last_rcvd);
112 spin_unlock(&filter->fo_translock);
115 fcd->fcd_last_rcvd = cpu_to_le64(last_rcvd);
117 /* could get xid from oti, if it's ever needed */
118 fcd->fcd_last_xid = 0;
120 off = fed->fed_lr_off;
122 fsfilt_add_journal_cb(exp->exp_obd, filter->fo_sb, last_rcvd,
123 oti->oti_handle, filter_commit_cb, NULL);
125 err = fsfilt_write_record(exp->exp_obd, filter->fo_rcvd_filp, fcd,
126 sizeof(*fcd), &off, 0);
133 CDEBUG(log_pri, "wrote trans "LPU64" for client %s at #%d: err = %d\n",
134 last_rcvd, fcd->fcd_uuid, fed->fed_lr_idx, err);
139 void f_dput(struct dentry *dentry)
141 /* Can't go inside filter_ddelete because it can block */
142 CDEBUG(D_INODE, "putting %s: %p, count = %d\n",
143 dentry->d_name.name, dentry, atomic_read(&dentry->d_count) - 1);
144 LASSERT(atomic_read(&dentry->d_count) > 0);
149 /* Add client data to the FILTER. We use a bitmap to locate a free space
150 * in the last_rcvd file if cl_idx is -1 (i.e. a new client).
151 * Otherwise, we have just read the data from the last_rcvd file and
152 * we know its offset. */
153 static int filter_client_add(struct obd_device *obd, struct filter_obd *filter,
154 struct filter_export_data *fed, int cl_idx)
156 unsigned long *bitmap = filter->fo_last_rcvd_slots;
157 int new_client = (cl_idx == -1);
160 LASSERT(bitmap != NULL);
162 /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
163 if (!strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid))
166 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
167 * there's no need for extra complication here
170 cl_idx = find_first_zero_bit(bitmap, FILTER_LR_MAX_CLIENTS);
172 if (cl_idx >= FILTER_LR_MAX_CLIENTS) {
173 CERROR("no client slots - fix FILTER_LR_MAX_CLIENTS\n");
176 if (test_and_set_bit(cl_idx, bitmap)) {
177 CERROR("FILTER client %d: found bit is set in bitmap\n",
179 cl_idx = find_next_zero_bit(bitmap,
180 FILTER_LR_MAX_CLIENTS,
185 if (test_and_set_bit(cl_idx, bitmap)) {
186 CERROR("FILTER client %d: bit already set in bitmap!\n",
192 fed->fed_lr_idx = cl_idx;
193 fed->fed_lr_off = le32_to_cpu(filter->fo_fsd->fsd_client_start) +
194 cl_idx * le16_to_cpu(filter->fo_fsd->fsd_client_size);
196 CDEBUG(D_INFO, "client at index %d (%llu) with UUID '%s' added\n",
197 fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
200 struct lvfs_run_ctxt saved;
201 loff_t off = fed->fed_lr_off;
205 CDEBUG(D_INFO, "writing client fcd at idx %u (%llu) (len %u)\n",
206 fed->fed_lr_idx,off,(unsigned int)sizeof(*fed->fed_fcd));
208 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
209 /* Transaction needed to fix bug 1403 */
210 handle = fsfilt_start(obd,
211 filter->fo_rcvd_filp->f_dentry->d_inode,
212 FSFILT_OP_SETATTR, NULL);
213 if (IS_ERR(handle)) {
214 err = PTR_ERR(handle);
215 CERROR("unable to start transaction: rc %d\n", err);
217 err = fsfilt_write_record(obd, filter->fo_rcvd_filp,
219 sizeof(*fed->fed_fcd),
221 fsfilt_commit(obd, filter->fo_sb,
222 filter->fo_rcvd_filp->f_dentry->d_inode,
225 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
228 CERROR("error writing %s client idx %u: rc %d\n",
229 LAST_RCVD, fed->fed_lr_idx, err);
236 static int filter_client_free(struct obd_export *exp, int flags)
238 struct filter_export_data *fed = &exp->exp_filter_data;
239 struct filter_obd *filter = &exp->exp_obd->u.filter;
240 struct obd_device *obd = exp->exp_obd;
241 struct filter_client_data zero_fcd;
242 struct lvfs_run_ctxt saved;
247 if (fed->fed_fcd == NULL)
250 if (flags & OBD_OPT_FAILOVER)
253 /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
254 if (strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid ) == 0)
257 LASSERT(filter->fo_last_rcvd_slots != NULL);
259 off = fed->fed_lr_off;
261 CDEBUG(D_INFO, "freeing client at idx %u (%lld) with UUID '%s'\n",
262 fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
264 /* Clear the bit _after_ zeroing out the client so we don't
265 race with filter_client_add and zero out new clients.*/
266 if (!test_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
267 CERROR("FILTER client %u: bit already clear in bitmap!!\n",
272 memset(&zero_fcd, 0, sizeof zero_fcd);
273 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
274 rc = fsfilt_write_record(obd, filter->fo_rcvd_filp, &zero_fcd,
275 sizeof(zero_fcd), &off, 1);
277 /* update server's transno */
278 filter_update_server_data(obd, filter->fo_rcvd_filp,
280 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
282 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
283 "zeroing disconnecting client %s at idx %u (%llu) in %s rc %d\n",
284 fed->fed_fcd->fcd_uuid, fed->fed_lr_idx, fed->fed_lr_off,
287 if (!test_and_clear_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
288 CERROR("FILTER client %u: bit already clear in bitmap!!\n",
294 OBD_FREE(fed->fed_fcd, sizeof(*fed->fed_fcd));
299 static int filter_free_server_data(struct filter_obd *filter)
301 OBD_FREE(filter->fo_fsd, sizeof(*filter->fo_fsd));
302 filter->fo_fsd = NULL;
303 OBD_FREE(filter->fo_last_rcvd_slots, FILTER_LR_MAX_CLIENTS/8);
304 filter->fo_last_rcvd_slots = NULL;
308 /* assumes caller is already in kernel ctxt */
309 int filter_update_server_data(struct obd_device *obd, struct file *filp,
310 struct filter_server_data *fsd, int force_sync)
316 CDEBUG(D_INODE, "server uuid : %s\n", fsd->fsd_uuid);
317 CDEBUG(D_INODE, "server last_rcvd : "LPU64"\n",
318 le64_to_cpu(fsd->fsd_last_transno));
319 CDEBUG(D_INODE, "server last_mount: "LPU64"\n",
320 le64_to_cpu(fsd->fsd_mount_count));
322 rc = fsfilt_write_record(obd, filp, fsd, sizeof(*fsd), &off,force_sync);
324 CERROR("error writing filter_server_data: rc = %d\n", rc);
329 int filter_update_last_objid(struct obd_device *obd, obd_gr group,
332 struct filter_obd *filter = &obd->u.filter;
338 if (filter->fo_last_objid_files[group] == NULL) {
339 CERROR("Object group "LPU64" not fully setup; not updating "
340 "last_objid\n", group);
344 CDEBUG(D_INODE, "server last_objid for group "LPU64": "LPU64"\n",
345 group, filter->fo_last_objids[group]);
347 tmp = cpu_to_le64(filter->fo_last_objids[group]);
348 rc = fsfilt_write_record(obd, filter->fo_last_objid_files[group],
349 &tmp, sizeof(tmp), &off, force_sync);
351 CERROR("error writing group "LPU64" last objid: rc = %d\n",
356 /* assumes caller has already in kernel ctxt */
357 static int filter_init_server_data(struct obd_device *obd, struct file * filp)
359 struct filter_obd *filter = &obd->u.filter;
360 struct filter_server_data *fsd;
361 struct filter_client_data *fcd = NULL;
362 struct inode *inode = filp->f_dentry->d_inode;
363 unsigned long last_rcvd_size = inode->i_size;
369 /* ensure padding in the struct is the correct size */
370 LASSERT (offsetof(struct filter_server_data, fsd_padding) +
371 sizeof(fsd->fsd_padding) == FILTER_LR_SERVER_SIZE);
372 LASSERT (offsetof(struct filter_client_data, fcd_padding) +
373 sizeof(fcd->fcd_padding) == FILTER_LR_CLIENT_SIZE);
375 OBD_ALLOC(fsd, sizeof(*fsd));
378 filter->fo_fsd = fsd;
380 OBD_ALLOC(filter->fo_last_rcvd_slots, FILTER_LR_MAX_CLIENTS/8);
381 if (filter->fo_last_rcvd_slots == NULL) {
382 OBD_FREE(fsd, sizeof(*fsd));
386 if (last_rcvd_size == 0) {
387 CWARN("%s: initializing new %s\n", obd->obd_name, LAST_RCVD);
389 memcpy(fsd->fsd_uuid, obd->obd_uuid.uuid,sizeof(fsd->fsd_uuid));
390 fsd->fsd_last_transno = 0;
391 mount_count = fsd->fsd_mount_count = 0;
392 fsd->fsd_server_size = cpu_to_le32(FILTER_LR_SERVER_SIZE);
393 fsd->fsd_client_start = cpu_to_le32(FILTER_LR_CLIENT_START);
394 fsd->fsd_client_size = cpu_to_le16(FILTER_LR_CLIENT_SIZE);
395 fsd->fsd_subdir_count = cpu_to_le16(FILTER_SUBDIR_COUNT);
396 filter->fo_subdir_count = FILTER_SUBDIR_COUNT;
398 rc = fsfilt_read_record(obd, filp, fsd, sizeof(*fsd), &off);
400 CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
404 if (strcmp(fsd->fsd_uuid, obd->obd_uuid.uuid) != 0) {
405 CERROR("OBD UUID %s does not match last_rcvd UUID %s\n",
406 obd->obd_uuid.uuid, fsd->fsd_uuid);
407 GOTO(err_fsd, rc = -EINVAL);
409 mount_count = le64_to_cpu(fsd->fsd_mount_count);
410 filter->fo_subdir_count = le16_to_cpu(fsd->fsd_subdir_count);
413 if (fsd->fsd_feature_incompat & ~cpu_to_le32(FILTER_INCOMPAT_SUPP)) {
414 CERROR("unsupported feature %x\n",
415 le32_to_cpu(fsd->fsd_feature_incompat) &
416 ~FILTER_INCOMPAT_SUPP);
417 GOTO(err_fsd, rc = -EINVAL);
419 if (fsd->fsd_feature_rocompat & ~cpu_to_le32(FILTER_ROCOMPAT_SUPP)) {
420 CERROR("read-only feature %x\n",
421 le32_to_cpu(fsd->fsd_feature_rocompat) &
422 ~FILTER_ROCOMPAT_SUPP);
423 /* Do something like remount filesystem read-only */
424 GOTO(err_fsd, rc = -EINVAL);
427 CDEBUG(D_INODE, "%s: server last_rcvd : "LPU64"\n",
428 obd->obd_name, le64_to_cpu(fsd->fsd_last_transno));
429 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
430 obd->obd_name, mount_count + 1);
431 CDEBUG(D_INODE, "%s: server data size: %u\n",
432 obd->obd_name, le32_to_cpu(fsd->fsd_server_size));
433 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
434 obd->obd_name, le32_to_cpu(fsd->fsd_client_start));
435 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
436 obd->obd_name, le32_to_cpu(fsd->fsd_client_size));
437 CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
438 obd->obd_name, le16_to_cpu(fsd->fsd_subdir_count));
439 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
440 last_rcvd_size <= le32_to_cpu(fsd->fsd_client_start) ? 0 :
441 (last_rcvd_size - le32_to_cpu(fsd->fsd_client_start)) /
442 le16_to_cpu(fsd->fsd_client_size));
444 if (!obd->obd_replayable) {
445 CWARN("%s: recovery support OFF\n", obd->obd_name);
449 for (cl_idx = 0, off = le32_to_cpu(fsd->fsd_client_start);
450 off < last_rcvd_size; cl_idx++) {
452 struct obd_export *exp;
453 struct filter_export_data *fed;
456 OBD_ALLOC(fcd, sizeof(*fcd));
458 GOTO(err_client, rc = -ENOMEM);
461 /* Don't assume off is incremented properly by
462 * fsfilt_read_record(), in case sizeof(*fcd)
463 * isn't the same as fsd->fsd_client_size. */
464 off = le32_to_cpu(fsd->fsd_client_start) +
465 cl_idx * le16_to_cpu(fsd->fsd_client_size);
466 rc = fsfilt_read_record(obd, filp, fcd, sizeof(*fcd), &off);
468 CERROR("error reading FILT %s idx %d off %llu: rc %d\n",
469 LAST_RCVD, cl_idx, off, rc);
470 break; /* read error shouldn't cause startup to fail */
473 if (fcd->fcd_uuid[0] == '\0') {
474 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
479 last_rcvd = le64_to_cpu(fcd->fcd_last_rcvd);
481 /* These exports are cleaned up by filter_disconnect(), so they
482 * need to be set up like real exports as filter_connect() does.
484 exp = class_new_export(obd);
485 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64" "
486 "srv lr: "LPU64" fcd_group %d \n", fcd->fcd_uuid, cl_idx,
487 last_rcvd, le64_to_cpu(fsd->fsd_last_transno),
488 le32_to_cpu(fcd->fcd_group));
490 GOTO(err_client, rc = -ENOMEM);
492 memcpy(&exp->exp_client_uuid.uuid, fcd->fcd_uuid,
493 sizeof exp->exp_client_uuid.uuid);
494 fed = &exp->exp_filter_data;
496 fed->fed_group = le32_to_cpu(fcd->fcd_group);
497 filter_client_add(obd, filter, fed, cl_idx);
498 /* create helper if export init gets more complex */
499 spin_lock_init(&fed->fed_lock);
502 exp->exp_req_replay_needed = 1;
503 exp->exp_lock_replay_needed = 1;
504 atomic_inc(&obd->obd_req_replay_clients);
505 atomic_inc(&obd->obd_lock_replay_clients);
506 obd->obd_recoverable_clients++;
507 obd->obd_max_recoverable_clients++;
508 class_export_put(exp);
510 CDEBUG(D_OTHER, "client at idx %d has last_rcvd = "LPU64"\n",
513 if (last_rcvd > le64_to_cpu(fsd->fsd_last_transno))
514 fsd->fsd_last_transno = cpu_to_le64(last_rcvd);
518 obd->obd_last_committed = le64_to_cpu(fsd->fsd_last_transno);
520 if (obd->obd_recoverable_clients) {
521 CWARN("RECOVERY: service %s, %d recoverable clients, "
522 "last_transno "LPU64"\n", obd->obd_name,
523 obd->obd_recoverable_clients,
524 le64_to_cpu(fsd->fsd_last_transno));
525 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
526 target_start_recovery_thread(obd, ost_handle);
530 OBD_FREE(fcd, sizeof(*fcd));
533 filter->fo_mount_count = mount_count + 1;
534 fsd->fsd_mount_count = cpu_to_le64(filter->fo_mount_count);
536 /* save it, so mount count and last_transno is current */
537 rc = filter_update_server_data(obd, filp, filter->fo_fsd, 1);
539 GOTO(err_client, rc);
543 class_disconnect_exports(obd, 0);
545 filter_free_server_data(filter);
549 static int filter_cleanup_groups(struct obd_device *obd)
551 struct filter_obd *filter = &obd->u.filter;
552 struct dentry *dentry;
556 for (i = 0; i < filter->fo_group_count; i++) {
557 if (filter->fo_subdirs != NULL) {
558 for (k = 0; k < filter->fo_subdir_count; k++) {
559 dentry = filter->fo_subdirs[i].dentry[k];
563 filter->fo_subdirs[i].dentry[k] = NULL;
566 if (filter->fo_last_objid_files[i] != NULL) {
567 filp_close(filter->fo_last_objid_files[i], 0);
568 filter->fo_last_objid_files[i] = NULL;
570 if (filter->fo_groups[i] != NULL) {
571 dput(filter->fo_groups[i]);
572 filter->fo_groups[i] = NULL;
575 if (filter->fo_subdirs != NULL)
576 OBD_FREE(filter->fo_subdirs,
577 filter->fo_group_count * sizeof(*filter->fo_subdirs));
578 if (filter->fo_groups != NULL)
579 OBD_FREE(filter->fo_groups,
580 filter->fo_group_count * sizeof(*filter->fo_groups));
581 if (filter->fo_last_objids != NULL)
582 OBD_FREE(filter->fo_last_objids,
583 filter->fo_group_count * sizeof(__u64));
584 if (filter->fo_last_objid_files != NULL)
585 OBD_FREE(filter->fo_last_objid_files,
586 filter->fo_group_count * sizeof(struct file *));
587 f_dput(filter->fo_dentry_O);
591 static int filter_update_last_group(struct obd_device *obd, int group)
593 struct filter_obd *filter = &obd->u.filter;
594 struct file *filp = NULL;
595 int last_group = 0, rc;
599 if (group <= filter->fo_committed_group)
602 filp = filp_open("LAST_GROUP", O_RDWR, 0700);
606 CERROR("cannot open LAST_GROUP: rc = %d\n", rc);
610 rc = fsfilt_read_record(obd, filp, &last_group, sizeof(__u32), &off);
612 CDEBUG(D_INODE, "error reading LAST_GROUP: rc %d\n",rc);
615 LASSERT(off == 0 || last_group >= FILTER_MIN_GROUPS);
616 CDEBUG(D_INODE, "%s: previous %d, new %d\n",
617 obd->obd_name, last_group, group);
621 /* must be sync: bXXXX */
622 rc = fsfilt_write_record(obd, filp, &last_group, sizeof(__u32), &off, 1);
624 CDEBUG(D_INODE, "error updating LAST_GROUP: rc %d\n", rc);
628 filter->fo_committed_group = group;
635 static int filter_read_group_internal(struct obd_device *obd, int group,
638 struct filter_obd *filter = &obd->u.filter;
639 __u64 *new_objids = NULL;
640 struct filter_subdirs *new_subdirs = NULL, *tmp_subdirs = NULL;
641 struct dentry **new_groups = NULL;
642 struct file **new_files = NULL;
643 struct dentry *dentry;
645 int old_count = filter->fo_group_count, rc, stage = 0, i;
650 snprintf(name, 24, "%d", group);
654 dentry = ll_lookup_one_len(name, filter->fo_dentry_O,
656 if (IS_ERR(dentry)) {
657 CERROR("Cannot lookup expected object group %d: %ld\n",
658 group, PTR_ERR(dentry));
659 RETURN(PTR_ERR(dentry));
662 dentry = simple_mkdir(filter->fo_dentry_O, name, 0700, 1);
663 if (IS_ERR(dentry)) {
664 CERROR("cannot lookup/create O/%s: rc = %ld\n", name,
666 RETURN(PTR_ERR(dentry));
671 snprintf(name, 24, "O/%d/LAST_ID", group);
673 filp = filp_open(name, O_CREAT | O_RDWR, 0700);
675 CERROR("cannot create %s: rc = %ld\n", name, PTR_ERR(filp));
676 GOTO(cleanup, rc = PTR_ERR(filp));
680 rc = fsfilt_read_record(obd, filp, &last_objid, sizeof(__u64), &off);
682 CDEBUG(D_INODE, "error reading %s: rc %d\n", name, rc);
686 if (filter->fo_subdir_count) {
687 OBD_ALLOC(tmp_subdirs, sizeof(*tmp_subdirs));
688 if (tmp_subdirs == NULL)
689 GOTO(cleanup, rc = -ENOMEM);
692 for (i = 0; i < filter->fo_subdir_count; i++) {
694 snprintf(dir, sizeof(dir), "d%u", i);
696 tmp_subdirs->dentry[i] =
697 simple_mkdir(dentry, dir, 0700, 1);
698 if (IS_ERR(tmp_subdirs->dentry[i])) {
699 rc = PTR_ERR(tmp_subdirs->dentry[i]);
700 CERROR("can't lookup/create O/%d/%s: rc = %d\n",
704 CDEBUG(D_INODE, "got/created O/%d/%s: %p\n", group, dir,
705 tmp_subdirs->dentry[i]);
709 /* 'group' is an index; we need an array of length 'group + 1' */
710 if (group + 1 > old_count) {
712 OBD_ALLOC(new_objids, len * sizeof(*new_objids));
713 OBD_ALLOC(new_subdirs, len * sizeof(*new_subdirs));
714 OBD_ALLOC(new_groups, len * sizeof(*new_groups));
715 OBD_ALLOC(new_files, len * sizeof(*new_files));
717 if (new_objids == NULL || new_subdirs == NULL ||
718 new_groups == NULL || new_files == NULL)
719 GOTO(cleanup, rc = -ENOMEM);
721 memcpy(new_objids, filter->fo_last_objids,
722 old_count * sizeof(*new_objids));
723 memcpy(new_subdirs, filter->fo_subdirs,
724 old_count * sizeof(*new_subdirs));
725 memcpy(new_groups, filter->fo_groups,
726 old_count * sizeof(*new_groups));
727 memcpy(new_files, filter->fo_last_objid_files,
728 old_count * sizeof(*new_files));
731 OBD_FREE(filter->fo_last_objids,
732 old_count * sizeof(*new_objids));
733 OBD_FREE(filter->fo_subdirs,
734 old_count * sizeof(*new_subdirs));
735 OBD_FREE(filter->fo_groups,
736 old_count * sizeof(*new_groups));
737 OBD_FREE(filter->fo_last_objid_files,
738 old_count * sizeof(*new_files));
740 filter->fo_last_objids = new_objids;
741 filter->fo_subdirs = new_subdirs;
742 filter->fo_groups = new_groups;
743 filter->fo_last_objid_files = new_files;
744 filter->fo_group_count = len;
747 filter->fo_groups[group] = dentry;
748 filter->fo_last_objid_files[group] = filp;
749 if (filter->fo_subdir_count) {
750 filter->fo_subdirs[group] = *tmp_subdirs;
751 OBD_FREE(tmp_subdirs, sizeof(*tmp_subdirs));
754 filter_update_last_group(obd, group);
756 if (filp->f_dentry->d_inode->i_size == 0) {
757 filter->fo_last_objids[group] = FILTER_INIT_OBJID;
761 filter->fo_last_objids[group] = le64_to_cpu(last_objid);
762 CDEBUG(D_INODE, "%s: server last_objid group %d: "LPU64"\n",
763 obd->obd_name, group, last_objid);
768 if (new_objids != NULL)
769 OBD_FREE(new_objids, group * sizeof(*new_objids));
770 if (new_subdirs != NULL)
771 OBD_FREE(new_subdirs, group * sizeof(*new_subdirs));
772 if (new_groups != NULL)
773 OBD_FREE(new_groups, group * sizeof(*new_groups));
774 if (new_files != NULL)
775 OBD_FREE(new_files, group * sizeof(*new_files));
777 if (filter->fo_subdir_count) {
778 for (i = 0; i < filter->fo_subdir_count; i++) {
779 if (tmp_subdirs->dentry[i] != NULL)
780 dput(tmp_subdirs->dentry[i]);
782 OBD_FREE(tmp_subdirs, sizeof(*tmp_subdirs));
792 static int filter_read_groups(struct obd_device *obd, int last_group,
795 struct filter_obd *filter = &obd->u.filter;
796 int old_count, group, rc = 0;
798 down(&filter->fo_init_lock);
799 old_count = filter->fo_group_count;
800 for (group = old_count; group <= last_group; group++) {
802 continue; /* no group zero */
804 rc = filter_read_group_internal(obd, group, create);
808 up(&filter->fo_init_lock);
812 static int filter_prep_groups(struct obd_device *obd)
814 struct filter_obd *filter = &obd->u.filter;
815 struct dentry *dentry, *O_dentry;
816 int rc = 0, cleanup_phase = 0;
817 struct file *filp = NULL;
822 O_dentry = simple_mkdir(current->fs->pwd, "O", 0700, 1);
823 CDEBUG(D_INODE, "got/created O: %p\n", O_dentry);
824 if (IS_ERR(O_dentry)) {
825 rc = PTR_ERR(O_dentry);
826 CERROR("cannot open/create O: rc = %d\n", rc);
829 filter->fo_dentry_O = O_dentry;
830 cleanup_phase = 1; /* O_dentry */
832 /* Lookup "R" to tell if we're on an old OST FS and need to convert
833 * from O/R/<dir>/<objid> to O/0/<dir>/<objid>. This can be removed
834 * some time post 1.0 when all old-style OSTs have converted along
835 * with the init_objid hack. */
836 dentry = ll_lookup_one_len("R", O_dentry, 1);
838 GOTO(cleanup, rc = PTR_ERR(dentry));
839 if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)) {
840 struct dentry *O0_dentry = lookup_one_len("0", O_dentry, 1);
843 CWARN("converting OST to new object layout\n");
844 if (IS_ERR(O0_dentry)) {
845 rc = PTR_ERR(O0_dentry);
846 CERROR("error looking up O/0: rc %d\n", rc);
850 if (O0_dentry->d_inode) {
851 CERROR("Both O/R and O/0 exist. Fix manually.\n");
852 GOTO(cleanup_O0, rc = -EEXIST);
855 down(&O_dentry->d_inode->i_sem);
856 rc = vfs_rename(O_dentry->d_inode, dentry,
857 O_dentry->d_inode, O0_dentry);
858 up(&O_dentry->d_inode->i_sem);
861 CERROR("error renaming O/R to O/0: rc %d\n", rc);
862 GOTO(cleanup_O0, rc);
864 filter->fo_fsd->fsd_feature_incompat |=
865 cpu_to_le32(FILTER_INCOMPAT_GROUPS);
866 rc = filter_update_server_data(obd, filter->fo_rcvd_filp,
868 GOTO(cleanup_O0, rc);
880 cleanup_phase = 2; /* groups */
882 /* we have to initialize all groups before first connections from
883 * clients because they may send create/destroy for any group -bzzz */
884 filp = filp_open("LAST_GROUP", O_CREAT | O_RDWR, 0700);
886 CERROR("cannot create LAST_GROUP: rc = %ld\n", PTR_ERR(filp));
887 GOTO(cleanup, rc = PTR_ERR(filp));
889 cleanup_phase = 3; /* filp */
891 rc = fsfilt_read_record(obd, filp, &last_group, sizeof(__u32), &off);
893 CDEBUG(D_INODE, "error reading LAST_GROUP: rc %d\n", rc);
897 last_group = FILTER_MIN_GROUPS;
899 LASSERT(last_group >= FILTER_MIN_GROUPS);
902 CWARN("%s: initialize groups [%d,%d]\n", obd->obd_name,
903 FILTER_MIN_GROUPS, last_group);
904 filter->fo_committed_group = last_group;
905 rc = filter_read_groups(obd, last_group, 1);
913 switch (cleanup_phase) {
917 filter_cleanup_groups(obd);
919 f_dput(filter->fo_dentry_O);
920 filter->fo_dentry_O = NULL;
927 /* setup the object store with correct subdirectories */
928 static int filter_prep(struct obd_device *obd)
930 struct lvfs_run_ctxt saved;
931 struct filter_obd *filter = &obd->u.filter;
937 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
938 file = filp_open(LAST_RCVD, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
939 if (!file || IS_ERR(file)) {
941 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
946 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
947 CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
948 file->f_dentry->d_inode->i_mode);
949 GOTO(err_filp, rc = -ENOENT);
952 /* steal operations */
953 inode = file->f_dentry->d_inode;
954 filter->fo_fop = file->f_op;
955 filter->fo_iop = inode->i_op;
956 filter->fo_aops = inode->i_mapping->a_ops;
958 rc = filter_init_server_data(obd, file);
960 CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
963 filter->fo_rcvd_filp = file;
965 rc = filter_prep_groups(obd);
967 GOTO(err_server_data, rc);
970 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
975 //class_disconnect_exports(obd, 0);
976 filter_free_server_data(filter);
978 if (filp_close(file, 0))
979 CERROR("can't close %s after error\n", LAST_RCVD);
980 filter->fo_rcvd_filp = NULL;
984 /* cleanup the filter: write last used object id to status file */
985 static void filter_post(struct obd_device *obd)
987 struct lvfs_run_ctxt saved;
988 struct filter_obd *filter = &obd->u.filter;
991 /* XXX: filter_update_lastobjid used to call fsync_dev. It might be
992 * best to start a transaction with h_sync, because we removed this
995 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
996 rc = filter_update_server_data(obd, filter->fo_rcvd_filp,
999 CERROR("error writing server data: rc = %d\n", rc);
1001 for (i = 1; i < filter->fo_group_count; i++) {
1002 rc = filter_update_last_objid(obd, i,
1003 (i == filter->fo_group_count - 1));
1005 CERROR("error writing group %d lastobjid: rc = %d\n",
1009 rc = filp_close(filter->fo_rcvd_filp, 0);
1010 filter->fo_rcvd_filp = NULL;
1012 CERROR("error closing %s: rc = %d\n", LAST_RCVD, rc);
1014 filter_cleanup_groups(obd);
1015 filter_free_server_data(filter);
1016 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1019 static void filter_set_last_id(struct filter_obd *filter, int group, obd_id id)
1021 LASSERT(filter->fo_fsd != NULL);
1023 LASSERT(group < filter->fo_group_count);
1025 spin_lock(&filter->fo_objidlock);
1026 filter->fo_last_objids[group] = id;
1027 spin_unlock(&filter->fo_objidlock);
1030 __u64 filter_last_id(struct filter_obd *filter, int group)
1033 LASSERT(filter->fo_fsd != NULL);
1035 LASSERT(group < filter->fo_group_count);
1037 spin_lock(&filter->fo_objidlock);
1038 id = filter->fo_last_objids[group];
1039 spin_unlock(&filter->fo_objidlock);
1044 /* direct cut-n-paste of mds_blocking_ast() */
1045 static int filter_blocking_ast(struct ldlm_lock *lock,
1046 struct ldlm_lock_desc *desc,
1047 void *data, int flag)
1052 if (flag == LDLM_CB_CANCELING) {
1053 /* Don't need to do anything here. */
1057 /* XXX layering violation! -phil */
1058 l_lock(&lock->l_resource->lr_namespace->ns_lock);
1059 /* Get this: if filter_blocking_ast is racing with ldlm_intent_policy,
1060 * such that filter_blocking_ast is called just before l_i_p takes the
1061 * ns_lock, then by the time we get the lock, we might not be the
1062 * correct blocking function anymore. So check, and return early, if
1064 if (lock->l_blocking_ast != filter_blocking_ast) {
1065 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
1069 lock->l_flags |= LDLM_FL_CBPENDING;
1070 do_ast = (!lock->l_readers && !lock->l_writers);
1071 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
1074 struct lustre_handle lockh;
1077 LDLM_DEBUG(lock, "already unused, calling ldlm_cli_cancel");
1078 ldlm_lock2handle(lock, &lockh);
1079 rc = ldlm_cli_cancel(&lockh);
1081 CERROR("ldlm_cli_cancel: %d\n", rc);
1083 LDLM_DEBUG(lock, "Lock still has references, will be "
1089 extern void *lock_dir(struct inode *dir, struct qstr *name);
1090 extern void unlock_dir(struct inode *dir, void *lock);
1092 static void * filter_lock_dentry(struct obd_device *obd,
1093 struct dentry *dparent, obd_id id)
1099 qstr.len = sprintf(name, LPU64, id);
1100 return lock_dir(dparent->d_inode, &qstr);
1102 down(&dparent->d_inode->i_sem);
1107 /* We never dget the object parent, so DON'T dput it either */
1108 static void filter_parent_unlock(struct dentry *dparent, void *lock)
1111 LASSERT(lock != NULL);
1112 unlock_dir(dparent->d_inode, lock);
1114 up(&dparent->d_inode->i_sem);
1118 /* We never dget the object parent, so DON'T dput it either */
1119 struct dentry *filter_parent(struct obd_device *obd, obd_gr group, obd_id objid)
1121 struct filter_obd *filter = &obd->u.filter;
1122 LASSERT(group < filter->fo_group_count);
1125 if (filter->fo_subdir_count == 0)
1126 return filter->fo_groups[group];
1128 return filter->fo_subdirs[group].dentry[objid & (filter->fo_subdir_count - 1)];
1131 /* We never dget the object parent, so DON'T dput it either */
1132 struct dentry *filter_parent_lock(struct obd_device *obd, obd_gr group,
1133 obd_id objid, void **lock)
1135 unsigned long now = jiffies;
1136 struct dentry *dparent = filter_parent(obd, group, objid);
1138 if (IS_ERR(dparent))
1142 LASSERT(dparent->d_inode);
1144 *lock = filter_lock_dentry(obd, dparent, objid);
1145 fsfilt_check_slow(now, obd_timeout, "parent lock");
1149 /* How to get files, dentries, inodes from object id's.
1151 * If dir_dentry is passed, the caller has already locked the parent
1152 * appropriately for this operation (normally a write lock). If
1153 * dir_dentry is NULL, we do a read lock while we do the lookup to
1154 * avoid races with create/destroy and such changing the directory
1155 * internal to the filesystem code. */
1156 struct dentry *filter_id2dentry(struct obd_device *obd,
1157 struct dentry *dir_dentry,
1158 obd_gr group, obd_id id)
1160 struct dentry *dparent = dir_dentry;
1161 struct dentry *dchild;
1168 CERROR("fatal: invalid object id 0\n");
1169 RETURN(ERR_PTR(-ESTALE));
1172 len = sprintf(name, LPU64, id);
1173 if (dir_dentry == NULL) {
1174 dparent = filter_parent_lock(obd, group, id, &lock);
1175 if (IS_ERR(dparent)) {
1176 CERROR("%s: error getting object "LPU64":"LPU64
1177 " parent: rc %ld\n", obd->obd_name,
1178 id, group, PTR_ERR(dparent));
1182 CDEBUG(D_INODE, "looking up object O/%.*s/%s\n",
1183 dparent->d_name.len, dparent->d_name.name, name);
1184 dchild = /*ll_*/lookup_one_len(name, dparent, len);
1185 if (dir_dentry == NULL)
1186 filter_parent_unlock(dparent, lock);
1187 if (IS_ERR(dchild)) {
1188 CERROR("%s: child lookup error %ld\n", obd->obd_name,
1193 if (dchild->d_inode != NULL && is_bad_inode(dchild->d_inode)) {
1194 CERROR("%s: got bad inode "LPU64"\n", obd->obd_name, id);
1196 RETURN(ERR_PTR(-ENOENT));
1199 CDEBUG(D_INODE, "got child objid %s: %p, count = %d\n",
1200 name, dchild, atomic_read(&dchild->d_count));
1202 LASSERT(atomic_read(&dchild->d_count) > 0);
1207 static int filter_prepare_destroy(struct obd_device *obd, obd_id objid,
1210 struct lustre_handle lockh;
1211 int flags = LDLM_AST_DISCARD_DATA, rc;
1212 struct ldlm_res_id res_id = { .name = { objid, 0, group, 0 } };
1213 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
1216 /* Tell the clients that the object is gone now and that they should
1217 * throw away any cached pages. */
1218 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, res_id,
1219 LDLM_EXTENT, &policy, LCK_PW,
1220 &flags, filter_blocking_ast, ldlm_completion_ast,
1221 NULL, NULL, NULL, 0, NULL, &lockh);
1223 /* We only care about the side-effects, just drop the lock. */
1225 ldlm_lock_decref(&lockh, LCK_PW);
1230 /* Caller must hold LCK_PW on parent and push us into kernel context.
1231 * Caller is also required to ensure that dchild->d_inode exists. */
1232 static int filter_destroy_internal(struct obd_device *obd, obd_id objid,
1233 struct dentry *dparent,
1234 struct dentry *dchild)
1236 struct inode *inode = dchild->d_inode;
1240 if (inode->i_nlink != 1 || atomic_read(&inode->i_count) != 1) {
1241 CERROR("destroying objid %.*s nlink = %lu, count = %d\n",
1242 dchild->d_name.len, dchild->d_name.name,
1243 (unsigned long)inode->i_nlink,
1244 atomic_read(&inode->i_count));
1247 rc = vfs_unlink(dparent->d_inode, dchild);
1250 CERROR("error unlinking objid %.*s: rc %d\n",
1251 dchild->d_name.len, dchild->d_name.name, rc);
1256 static int filter_intent_policy(struct ldlm_namespace *ns,
1257 struct ldlm_lock **lockp, void *req_cookie,
1258 ldlm_mode_t mode, int flags, void *data)
1260 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1261 struct ptlrpc_request *req = req_cookie;
1262 struct ldlm_lock *lock = *lockp, *l = NULL;
1263 struct ldlm_resource *res = lock->l_resource;
1264 ldlm_processing_policy policy;
1265 struct ost_lvb *res_lvb, *reply_lvb;
1266 struct ldlm_reply *rep;
1267 struct list_head *tmp;
1269 int tmpflags = 0, rc, repsize[2] = {sizeof(*rep), sizeof(*reply_lvb)};
1272 policy = ldlm_get_processing_policy(res);
1273 LASSERT(policy != NULL);
1274 LASSERT(req != NULL);
1276 rc = lustre_pack_reply(req, 2, repsize, NULL);
1278 RETURN(req->rq_status = rc);
1280 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*rep));
1281 LASSERT(rep != NULL);
1283 reply_lvb = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*reply_lvb));
1284 LASSERT(reply_lvb != NULL);
1286 //fixup_handle_for_resent_req(req, lock, &lockh);
1288 /* If we grant any lock at all, it will be a whole-file read lock.
1289 * Call the extent policy function to see if our request can be
1290 * granted, or is blocked. */
1291 lock->l_policy_data.l_extent.start = 0;
1292 lock->l_policy_data.l_extent.end = OBD_OBJECT_EOF;
1293 lock->l_req_mode = LCK_PR;
1295 l_lock(&res->lr_namespace->ns_lock);
1297 res->lr_tmp = &rpc_list;
1298 rc = policy(lock, &tmpflags, 0, &err);
1301 /* FIXME: we should change the policy function slightly, to not make
1302 * this list at all, since we just turn around and free it */
1303 while (!list_empty(&rpc_list)) {
1304 struct ldlm_ast_work *w =
1305 list_entry(rpc_list.next, struct ldlm_ast_work, w_list);
1306 list_del(&w->w_list);
1307 LDLM_LOCK_PUT(w->w_lock);
1308 OBD_FREE(w, sizeof(*w));
1311 if (rc == LDLM_ITER_CONTINUE) {
1312 /* The lock met with no resistance; we're finished. */
1313 l_unlock(&res->lr_namespace->ns_lock);
1314 RETURN(ELDLM_LOCK_REPLACED);
1317 /* Do not grant any lock, but instead send GL callbacks. The extent
1318 * policy nicely created a list of all PW locks for us. We will choose
1319 * the highest of those which are larger than the size in the LVB, if
1320 * any, and perform a glimpse callback. */
1321 down(&res->lr_lvb_sem);
1322 res_lvb = res->lr_lvb_data;
1323 LASSERT(res_lvb != NULL);
1324 *reply_lvb = *res_lvb;
1325 up(&res->lr_lvb_sem);
1327 list_for_each(tmp, &res->lr_granted) {
1328 struct ldlm_lock *tmplock =
1329 list_entry(tmp, struct ldlm_lock, l_res_link);
1331 if (tmplock->l_granted_mode == LCK_PR)
1334 if (tmplock->l_policy_data.l_extent.end <= reply_lvb->lvb_size)
1338 l = LDLM_LOCK_GET(tmplock);
1342 if (l->l_policy_data.l_extent.start >
1343 tmplock->l_policy_data.l_extent.start)
1347 l = LDLM_LOCK_GET(tmplock);
1349 l_unlock(&res->lr_namespace->ns_lock);
1351 /* There were no PW locks beyond the size in the LVB; finished. */
1353 RETURN(ELDLM_LOCK_ABORTED);
1355 if (l->l_glimpse_ast == NULL) {
1356 /* We are racing with unlink(); just return -ENOENT */
1357 rep->lock_policy_res1 = -ENOENT;
1361 LASSERTF(l->l_glimpse_ast != NULL, "l == %p", l);
1363 rc = l->l_glimpse_ast(l, NULL); /* this will update the LVB */
1364 if (rc != 0 && res->lr_namespace->ns_lvbo &&
1365 res->lr_namespace->ns_lvbo->lvbo_update) {
1366 res->lr_namespace->ns_lvbo->lvbo_update(res, NULL, 0, 1);
1369 down(&res->lr_lvb_sem);
1370 *reply_lvb = *res_lvb;
1371 up(&res->lr_lvb_sem);
1375 RETURN(ELDLM_LOCK_ABORTED);
1378 static int filter_post_fs_cleanup(struct obd_device *obd)
1382 rc = fsfilt_post_cleanup(obd);
1387 static int filter_group_set_fs_flags(struct obd_device *obd, int group)
1389 struct filter_obd *filter = &obd->u.filter;
1393 /* zero group is not longer valid. */
1396 for (i = 0; i < filter->fo_subdir_count; i++) {
1397 struct dentry *dentry;
1398 dentry = (filter->fo_subdirs + group)->dentry[i];
1399 rc = fsfilt_set_fs_flags(obd, dentry->d_inode,
1400 SM_DO_REC | SM_DO_COW);
1406 static int filter_post_fs_setup(struct obd_device *obd)
1408 struct filter_obd *filter = &obd->u.filter;
1410 struct llog_ctxt *ctxt = NULL;
1412 rc = fsfilt_post_setup(obd, filter->fo_dentry_O);
1416 for (j = 0; j < filter->fo_group_count; j++) {
1417 rc = filter_group_set_fs_flags(obd, j);
1422 fsfilt_get_reint_log_ctxt(obd, filter->fo_sb, &ctxt);
1424 ctxt->loc_obd = obd;
1425 ctxt->loc_idx = LLOG_REINT_ORIG_CTXT;
1426 obd->obd_llog_ctxt[LLOG_REINT_ORIG_CTXT] = ctxt;
1428 fsfilt_set_ost_flags(obd, filter->fo_sb);
1432 /* mount the file system (secretly) */
1433 int filter_common_setup(struct obd_device *obd, obd_count len, void *buf,
1436 struct lustre_cfg *lcfg = buf;
1437 struct filter_obd *filter = &obd->u.filter;
1438 struct lvfs_obd_ctxt *lvfs_ctxt = NULL;
1439 struct vfsmount *mnt;
1445 if ((LUSTRE_CFG_BUFLEN(lcfg, 1)) < 1 ||
1446 (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1))
1449 obd->obd_fsops = fsfilt_get_ops(lustre_cfg_string(lcfg, 2));
1450 if (IS_ERR(obd->obd_fsops))
1451 RETURN(PTR_ERR(obd->obd_fsops));
1453 rc = lvfs_mount_fs(lustre_cfg_string(lcfg, 1),
1454 lustre_cfg_string(lcfg, 2),
1455 option, MS_NOATIME | MS_NODIRATIME, &lvfs_ctxt);
1457 CERROR("lvfs_mount_fs failed: rc = %d\n", rc);
1462 mnt = lvfs_ctxt->loc_mnt;
1463 filter->fo_lvfs_ctxt = lvfs_ctxt;
1465 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0 && lustre_cfg_buf(lcfg, 3)) {
1466 str = lustre_cfg_string(lcfg, 3);
1468 obd->obd_replayable = 1;
1469 obd_sync_filter = 1;
1470 CWARN("%s: recovery enabled\n", obd->obd_name);
1473 CERROR("unrecognised flag '%c'\n",
1476 // XXX Robert? Why do we get errors here
1477 // GOTO(err_mntput, rc = -EINVAL);
1481 filter->fo_vfsmnt = mnt;
1482 filter->fo_sb = mnt->mnt_sb;
1483 filter->fo_fstype = mnt->mnt_sb->s_type->name;
1484 CDEBUG(D_SUPER, "%s: mnt = %p\n", filter->fo_fstype, mnt);
1486 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
1487 obd->obd_lvfs_ctxt.pwdmnt = mnt;
1488 obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
1489 obd->obd_lvfs_ctxt.fs = get_ds();
1490 obd->obd_lvfs_ctxt.cb_ops = filter_lvfs_ops;
1492 ll_clear_rdonly(ll_sbdev(filter->fo_sb));
1494 rc = fsfilt_setup(obd, mnt->mnt_sb);
1496 GOTO(err_mntput, rc);
1498 sema_init(&filter->fo_init_lock, 1);
1499 filter->fo_committed_group = 0;
1500 rc = filter_prep(obd);
1502 GOTO(err_mntput, rc);
1504 filter->fo_destroys_in_progress = 0;
1505 for (i = 0; i < 32; i++)
1506 sema_init(&filter->fo_create_locks[i], 1);
1508 spin_lock_init(&filter->fo_translock);
1509 spin_lock_init(&filter->fo_objidlock);
1510 INIT_LIST_HEAD(&filter->fo_export_list);
1511 sema_init(&filter->fo_alloc_lock, 1);
1512 spin_lock_init(&filter->fo_r_pages.oh_lock);
1513 spin_lock_init(&filter->fo_w_pages.oh_lock);
1514 spin_lock_init(&filter->fo_r_discont_pages.oh_lock);
1515 spin_lock_init(&filter->fo_w_discont_pages.oh_lock);
1516 spin_lock_init(&filter->fo_r_discont_blocks.oh_lock);
1517 spin_lock_init(&filter->fo_w_discont_blocks.oh_lock);
1518 filter->fo_readcache_max_filesize = FILTER_MAX_CACHE_SIZE;
1520 INIT_LIST_HEAD(&filter->fo_llog_list);
1521 spin_lock_init(&filter->fo_llog_list_lock);
1523 sprintf(ns_name, "filter-%s", obd->obd_uuid.uuid);
1524 obd->obd_namespace = ldlm_namespace_new(ns_name, LDLM_NAMESPACE_SERVER);
1526 if (obd->obd_namespace == NULL)
1527 GOTO(err_post, rc = -ENOMEM);
1528 obd->obd_namespace->ns_lvbp = obd;
1529 obd->obd_namespace->ns_lvbo = &filter_lvbo;
1530 ldlm_register_intent(obd->obd_namespace, filter_intent_policy);
1532 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1533 "filter_ldlm_cb_client", &obd->obd_ldlm_client);
1535 rc = obd_llog_cat_initialize(obd, &obd->obd_llogs, 1, CATLIST);
1537 CERROR("failed to setup llogging subsystems\n");
1546 lvfs_umount_fs(filter->fo_lvfs_ctxt);
1550 fsfilt_put_ops(obd->obd_fsops);
1554 static int filter_attach(struct obd_device *obd, obd_count len, void *data)
1556 struct lprocfs_static_vars lvars;
1559 lprocfs_init_vars(filter, &lvars);
1560 rc = lprocfs_obd_attach(obd, lvars.obd_vars);
1564 rc = lprocfs_alloc_obd_stats(obd, LPROC_FILTER_LAST);
1568 /* Init obdfilter private stats here */
1569 lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_READ_BYTES,
1570 LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes");
1571 lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_WRITE_BYTES,
1572 LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes");
1574 return lproc_filter_attach_seqstat(obd);
1577 static int filter_detach(struct obd_device *dev)
1579 lprocfs_free_obd_stats(dev);
1580 return lprocfs_obd_detach(dev);
1583 static int filter_setup(struct obd_device *obd, obd_count len, void *buf)
1585 struct lustre_cfg* lcfg = buf;
1588 /* all mount options including errors=remount-ro and asyncdel are passed
1589 * using 4th lcfg param. And it is good, finally we have got rid of
1590 * hardcoded fs types in the code. */
1591 rc = filter_common_setup(obd, len, buf, lustre_cfg_buf(lcfg, 4));
1594 rc = filter_post_fs_setup(obd);
1598 static int filter_cleanup(struct obd_device *obd, int flags)
1600 struct filter_obd *filter = &obd->u.filter;
1601 ll_sbdev_type save_dev;
1604 if (flags & OBD_OPT_FAILOVER)
1605 CERROR("%s: shutting down for failover; client state will"
1606 " be preserved.\n", obd->obd_name);
1608 if (!list_empty(&obd->obd_exports)) {
1609 CERROR("%s: still has clients!\n", obd->obd_name);
1610 class_disconnect_exports(obd, flags);
1611 if (!list_empty(&obd->obd_exports)) {
1612 CERROR("still has exports after forced cleanup?\n");
1617 target_cleanup_recovery(obd);
1619 ldlm_namespace_free(obd->obd_namespace, flags & OBD_OPT_FORCE);
1621 if (filter->fo_sb == NULL)
1624 save_dev = ll_sbdev(filter->fo_sb);
1625 filter_post_fs_cleanup(obd);
1628 shrink_dcache_parent(filter->fo_sb->s_root);
1632 lvfs_umount_fs(filter->fo_lvfs_ctxt);
1633 //destroy_buffers(filter->fo_sb->s_dev);
1634 filter->fo_sb = NULL;
1635 fsfilt_put_ops(obd->obd_fsops);
1638 ll_clear_rdonly(save_dev);
1643 static int filter_connect_post(struct obd_export *exp, unsigned initial,
1644 unsigned long connect_flags)
1646 struct obd_device *obd = exp->exp_obd;
1647 struct filter_export_data *fed;
1648 char str[PTL_NALFMT_SIZE];
1649 struct obd_llogs *llog;
1650 struct llog_ctxt *ctxt;
1654 fed = &exp->exp_filter_data;
1655 if (fed->fed_group < FILTER_MIN_GROUPS)
1658 /* initialize llogs for connections from MDS */
1659 llog = filter_grab_llog_for_group(obd, fed->fed_group, exp);
1660 LASSERT(llog != NULL);
1662 ctxt = llog_get_context(llog, LLOG_UNLINK_REPL_CTXT);
1663 LASSERT(ctxt != NULL);
1665 rc = llog_receptor_accept(ctxt, exp->exp_imp_reverse);
1666 portals_nid2str(exp->exp_connection->c_peer.peer_ni->pni_number,
1667 exp->exp_connection->c_peer.peer_id.nid, str);
1668 CDEBUG(D_OTHER, "%s: init llog ctxt for export "LPX64"/%s, group %d\n",
1669 obd->obd_name, exp->exp_connection->c_peer.peer_id.nid,
1670 str, fed->fed_group);
1675 /* nearly identical to mds_connect */
1676 static int filter_connect(struct lustre_handle *conn, struct obd_device *obd,
1677 struct obd_uuid *cluuid,
1678 struct obd_connect_data *data,
1679 unsigned long connect_flags)
1681 struct obd_export *exp;
1682 struct filter_export_data *fed;
1683 struct filter_client_data *fcd = NULL;
1684 struct filter_obd *filter = &obd->u.filter;
1685 struct lvfs_run_ctxt saved;
1689 if (conn == NULL || obd == NULL || cluuid == NULL)
1692 rc = class_connect(conn, obd, cluuid);
1695 exp = class_conn2export(conn);
1696 LASSERT(exp != NULL);
1698 fed = &exp->exp_filter_data;
1700 spin_lock_init(&fed->fed_lock);
1702 /* connection from MDS */
1703 group = connect_flags;
1704 if (obd->obd_replayable) {
1705 OBD_ALLOC(fcd, sizeof(*fcd));
1707 CERROR("filter: out of memory for client data\n");
1708 GOTO(cleanup, rc = -ENOMEM);
1711 memcpy(fcd->fcd_uuid, cluuid, sizeof(fcd->fcd_uuid));
1713 fed->fed_fcd->fcd_group = group;
1714 rc = filter_client_add(obd, filter, fed, -1);
1718 CWARN("%s: Received MDS connection ("LPX64"); group %d\n",
1719 obd->obd_name, exp->exp_handle.h_cookie, group);
1724 if (fed->fed_group != 0 && fed->fed_group != group) {
1725 char str[PTL_NALFMT_SIZE];
1726 portals_nid2str(exp->exp_connection->c_peer.peer_ni->pni_number,
1727 exp->exp_connection->c_peer.peer_id.nid, str);
1728 CERROR("!!! This export (nid "LPX64"/%s) used object group %d "
1729 "earlier; now it's trying to use group %d! This could "
1730 "be a bug in the MDS. Tell CFS.\n",
1731 exp->exp_connection->c_peer.peer_id.nid, str,
1732 fed->fed_group, group);
1733 GOTO(cleanup, rc = -EPROTO);
1735 fed->fed_group = group;
1737 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1738 rc = filter_read_groups(obd, group, 1);
1739 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1741 CERROR("can't read group %u\n", group);
1744 rc = filter_group_set_fs_flags(obd, group);
1746 CERROR("can't set kml flags %u\n", group);
1753 OBD_FREE(fcd, sizeof(*fcd));
1754 class_disconnect(exp, 0);
1756 class_export_put(exp);
1761 static int filter_precleanup(struct obd_device *obd, int flags)
1763 struct filter_group_llog *log;
1764 struct filter_obd *filter;
1768 filter = &obd->u.filter;
1770 spin_lock(&filter->fo_llog_list_lock);
1771 while (!list_empty(&filter->fo_llog_list)) {
1772 log = list_entry(filter->fo_llog_list.next,
1773 struct filter_group_llog, list);
1774 list_del(&log->list);
1775 spin_unlock(&filter->fo_llog_list_lock);
1777 rc = obd_llog_finish(obd, log->llogs, 0);
1779 CERROR("failed to cleanup llogging subsystem for %u\n",
1781 OBD_FREE(log->llogs, sizeof(*(log->llogs)));
1782 OBD_FREE(log, sizeof(*log));
1783 spin_lock(&filter->fo_llog_list_lock);
1785 spin_unlock(&filter->fo_llog_list_lock);
1787 rc = obd_llog_finish(obd, &obd->obd_llogs, 0);
1789 CERROR("failed to cleanup llogging subsystem\n");
1794 /* Do extra sanity checks for grant accounting. We do this at connect,
1795 * disconnect, and statfs RPC time, so it shouldn't be too bad. We can
1796 * always get rid of it or turn it off when we know accounting is good. */
1797 static void filter_grant_sanity_check(struct obd_device *obd, const char *func)
1799 struct filter_export_data *fed;
1800 struct obd_export *exp;
1801 obd_size maxsize = obd->obd_osfs.os_blocks * obd->obd_osfs.os_bsize;
1802 obd_size tot_dirty = 0, tot_pending = 0, tot_granted = 0;
1803 obd_size fo_tot_dirty, fo_tot_pending, fo_tot_granted;
1804 int level = D_CACHE;
1806 if (list_empty(&obd->obd_exports))
1809 spin_lock(&obd->obd_osfs_lock);
1810 spin_lock(&obd->obd_dev_lock);
1811 list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
1812 fed = &exp->exp_filter_data;
1813 if (fed->fed_grant < 0 || fed->fed_pending < 0 ||
1816 if (maxsize > 0) { /* we may not have done a statfs yet */
1817 LASSERTF(fed->fed_grant + fed->fed_pending <= maxsize,
1818 "cli %s/%p %ld+%ld > "LPU64"\n",
1819 exp->exp_client_uuid.uuid, exp,
1820 fed->fed_grant, fed->fed_pending, maxsize);
1821 LASSERTF(fed->fed_dirty <= maxsize,
1822 "cli %s/%p %ld > "LPU64"\n",
1823 exp->exp_client_uuid.uuid, exp,
1824 fed->fed_dirty, maxsize);
1826 CDEBUG(level, "%s: cli %s/%p dirty %ld pend %ld grant %ld\n",
1827 obd->obd_name, exp->exp_client_uuid.uuid, exp,
1828 fed->fed_dirty, fed->fed_pending, fed->fed_grant);
1829 tot_granted += fed->fed_grant + fed->fed_pending;
1830 tot_pending += fed->fed_pending;
1831 tot_dirty += fed->fed_dirty;
1833 fo_tot_granted = obd->u.filter.fo_tot_granted;
1834 fo_tot_pending = obd->u.filter.fo_tot_pending;
1835 fo_tot_dirty = obd->u.filter.fo_tot_dirty;
1836 spin_unlock(&obd->obd_dev_lock);
1837 spin_unlock(&obd->obd_osfs_lock);
1839 /* Do these assertions outside the spinlocks so we don't kill system */
1840 if (tot_granted != fo_tot_granted)
1841 CERROR("%s: tot_granted "LPU64" != fo_tot_granted "LPU64"\n",
1842 func, tot_granted, fo_tot_granted);
1843 if (tot_pending != fo_tot_pending)
1844 CERROR("%s: tot_pending "LPU64" != fo_tot_pending "LPU64"\n",
1845 func, tot_pending, fo_tot_pending);
1846 if (tot_dirty != fo_tot_dirty)
1847 CERROR("%s: tot_dirty "LPU64" != fo_tot_dirty "LPU64"\n",
1848 func, tot_dirty, fo_tot_dirty);
1849 if (tot_pending > tot_granted)
1850 CERROR("%s: tot_pending "LPU64" > tot_granted "LPU64"\n",
1851 func, tot_pending, tot_granted);
1852 if (tot_granted > maxsize)
1853 CERROR("%s: tot_granted "LPU64" > maxsize "LPU64"\n",
1854 func, tot_granted, maxsize);
1855 if (tot_dirty > maxsize)
1856 CERROR("%s: tot_dirty "LPU64" > maxsize "LPU64"\n",
1857 func, tot_dirty, maxsize);
1860 /* Remove this client from the grant accounting totals. We also remove
1861 * the export from the obd device under the osfs and dev locks to ensure
1862 * that the filter_grant_sanity_check() calculations are always valid.
1863 * The client should do something similar when it invalidates its import. */
1864 static void filter_grant_discard(struct obd_export *exp)
1866 struct obd_device *obd = exp->exp_obd;
1867 struct filter_obd *filter = &obd->u.filter;
1868 struct filter_export_data *fed = &exp->exp_filter_data;
1869 int level = D_CACHE;
1871 spin_lock(&obd->obd_osfs_lock);
1872 spin_lock(&exp->exp_obd->obd_dev_lock);
1873 list_del_init(&exp->exp_obd_chain);
1874 spin_unlock(&exp->exp_obd->obd_dev_lock);
1876 if (fed->fed_dirty < 0 || fed->fed_grant < 0 || fed->fed_pending < 0)
1878 CDEBUG(level, "%s: cli %s/%p dirty %ld pend %ld grant %ld\n",
1879 obd->obd_name, exp->exp_client_uuid.uuid, exp,
1880 fed->fed_dirty, fed->fed_pending, fed->fed_grant);
1882 LASSERTF(filter->fo_tot_granted >= fed->fed_grant,
1883 "%s: tot_granted "LPU64" cli %s/%p fed_grant %ld\n",
1884 obd->obd_name, filter->fo_tot_granted,
1885 exp->exp_client_uuid.uuid, exp, fed->fed_grant);
1886 filter->fo_tot_granted -= fed->fed_grant;
1887 LASSERTF(filter->fo_tot_pending >= fed->fed_pending,
1888 "%s: tot_pending "LPU64" cli %s/%p fed_pending %ld\n",
1889 obd->obd_name, filter->fo_tot_pending,
1890 exp->exp_client_uuid.uuid, exp, fed->fed_pending);
1891 LASSERTF(filter->fo_tot_dirty >= fed->fed_dirty,
1892 "%s: tot_dirty "LPU64" cli %s/%p fed_dirty %ld\n",
1893 obd->obd_name, filter->fo_tot_dirty,
1894 exp->exp_client_uuid.uuid, exp, fed->fed_dirty);
1895 filter->fo_tot_dirty -= fed->fed_dirty;
1899 spin_unlock(&obd->obd_osfs_lock);
1902 static int filter_destroy_export(struct obd_export *exp)
1906 if (exp->exp_filter_data.fed_pending)
1907 CERROR("%s: cli %s/%p has %lu pending on destroyed export\n",
1908 exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
1909 exp, exp->exp_filter_data.fed_pending);
1911 target_destroy_export(exp);
1913 if (exp->exp_obd->obd_replayable)
1914 filter_client_free(exp, exp->exp_flags);
1916 filter_grant_discard(exp);
1917 if (!(exp->exp_flags & OBD_OPT_FORCE))
1918 filter_grant_sanity_check(exp->exp_obd, __FUNCTION__);
1923 static void filter_sync_llogs(struct obd_device *obd, struct obd_export *dexp)
1925 struct filter_group_llog *fglog, *nlog;
1926 struct filter_obd *filter;
1927 int worked = 0, group;
1928 struct llog_ctxt *ctxt;
1931 filter = &obd->u.filter;
1933 /* we can't sync log holding spinlock. also, we do not want to get
1934 * into livelock. so we do following: loop over MDS's exports in
1935 * group order and skip already synced llogs -bzzz */
1937 /* look for group with min. number, but > worked */
1940 spin_lock(&filter->fo_llog_list_lock);
1941 list_for_each_entry(nlog, &filter->fo_llog_list, list) {
1943 if (nlog->group <= worked) {
1944 /* this group is already synced */
1948 if (group < nlog->group) {
1949 /* we have group with smaller number to sync */
1953 /* store current minimal group */
1955 group = nlog->group;
1957 spin_unlock(&filter->fo_llog_list_lock);
1962 worked = fglog->group;
1963 if (fglog->exp && (dexp == fglog->exp || dexp == NULL)) {
1964 ctxt = llog_get_context(fglog->llogs,
1965 LLOG_UNLINK_REPL_CTXT);
1966 LASSERT(ctxt != NULL);
1967 llog_sync(ctxt, fglog->exp);
1969 } while (fglog != NULL);
1972 /* also incredibly similar to mds_disconnect */
1973 static int filter_disconnect(struct obd_export *exp, unsigned long flags)
1975 struct obd_device *obd = exp->exp_obd;
1976 unsigned long irqflags;
1981 class_export_get(exp);
1983 spin_lock_irqsave(&exp->exp_lock, irqflags);
1984 exp->exp_flags = flags;
1985 spin_unlock_irqrestore(&exp->exp_lock, irqflags);
1987 if (!(flags & OBD_OPT_FORCE))
1988 filter_grant_sanity_check(obd, __FUNCTION__);
1989 filter_grant_discard(exp);
1991 /* Disconnect early so that clients can't keep using export */
1992 rc = class_disconnect(exp, flags);
1994 ldlm_cancel_locks_for_export(exp);
1996 fsfilt_sync(obd, obd->u.filter.fo_sb);
1998 /* flush any remaining cancel messages out to the target */
1999 filter_sync_llogs(obd, exp);
2000 class_export_put(exp);
2004 struct dentry *__filter_oa2dentry(struct obd_device *obd,
2005 struct obdo *oa, const char *what)
2007 struct dentry *dchild = NULL;
2010 if (oa->o_valid & OBD_MD_FLGROUP)
2013 dchild = filter_id2dentry(obd, NULL, group, oa->o_id);
2015 if (IS_ERR(dchild)) {
2016 CERROR("%s error looking up object: "LPU64"\n",
2021 if (dchild->d_inode == NULL) {
2022 CERROR("%s: %s on non-existent object: "LPU64"\n",
2023 obd->obd_name, what, oa->o_id);
2025 RETURN(ERR_PTR(-ENOENT));
2031 static int filter_getattr(struct obd_export *exp, struct obdo *oa,
2032 struct lov_stripe_md *md)
2034 struct dentry *dentry = NULL;
2035 struct obd_device *obd;
2039 obd = class_exp2obd(exp);
2041 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
2042 exp->exp_handle.h_cookie);
2046 dentry = filter_oa2dentry(obd, oa);
2048 RETURN(PTR_ERR(dentry));
2050 /* Limit the valid bits in the return data to what we actually use */
2051 oa->o_valid = OBD_MD_FLID;
2052 obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
2058 /* this is called from filter_truncate() until we have filter_punch() */
2059 static int filter_setattr(struct obd_export *exp, struct obdo *oa,
2060 struct lov_stripe_md *md, struct obd_trans_info *oti)
2062 struct lvfs_run_ctxt saved;
2063 struct filter_obd *filter;
2064 struct dentry *dentry;
2066 struct ldlm_res_id res_id = { .name = { oa->o_id, 0, oa->o_gr, 0 } };
2067 struct ldlm_resource *res;
2072 LASSERT(oti != NULL);
2074 dentry = filter_oa2dentry(exp->exp_obd, oa);
2076 RETURN(PTR_ERR(dentry));
2078 filter = &exp->exp_obd->u.filter;
2080 iattr_from_obdo(&iattr, oa, oa->o_valid);
2082 push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
2085 if (iattr.ia_valid & ATTR_SIZE)
2086 down(&dentry->d_inode->i_sem);
2087 handle = fsfilt_start(exp->exp_obd, dentry->d_inode, FSFILT_OP_SETATTR,
2090 GOTO(out_unlock, rc = PTR_ERR(handle));
2092 /* XXX this could be a rwsem instead, if filter_preprw played along */
2093 if (iattr.ia_valid & ATTR_ATTR_FLAG)
2094 rc = fsfilt_iocontrol(exp->exp_obd, dentry->d_inode, NULL,
2096 (long)&iattr.ia_attr_flags);
2098 rc = fsfilt_setattr(exp->exp_obd, dentry, handle, &iattr, 1);
2099 rc = filter_finish_transno(exp, oti, rc);
2100 rc2 = fsfilt_commit(exp->exp_obd, filter->fo_sb, dentry->d_inode,
2101 handle, exp->exp_sync);
2103 CERROR("error on commit, err = %d\n", rc2);
2108 res = ldlm_resource_get(exp->exp_obd->obd_namespace, NULL,
2109 res_id, LDLM_EXTENT, 0);
2111 if (res->lr_namespace->ns_lvbo &&
2112 res->lr_namespace->ns_lvbo->lvbo_update)
2113 rc = res->lr_namespace->ns_lvbo->lvbo_update(res, NULL,
2115 ldlm_resource_putref(res);
2116 } else if (iattr.ia_valid & ATTR_SIZE) {
2117 /* called from MDS. */
2120 oa->o_valid = OBD_MD_FLID;
2121 obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
2124 if (iattr.ia_valid & ATTR_SIZE)
2125 up(&dentry->d_inode->i_sem);
2127 pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
2133 /* XXX identical to osc_unpackmd */
2134 static int filter_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2135 struct lov_mds_md *lmm, int lmm_bytes)
2141 if (lmm_bytes < sizeof (*lmm)) {
2142 CERROR("lov_mds_md too small: %d, need %d\n",
2143 lmm_bytes, (int)sizeof(*lmm));
2146 /* XXX LOV_MAGIC etc check? */
2148 if (lmm->lmm_object_id == cpu_to_le64(0)) {
2149 CERROR("lov_mds_md: zero lmm_object_id\n");
2154 lsm_size = lov_stripe_md_size(1);
2158 if (*lsmp != NULL && lmm == NULL) {
2159 OBD_FREE(*lsmp, lsm_size);
2164 if (*lsmp == NULL) {
2165 OBD_ALLOC(*lsmp, lsm_size);
2169 loi_init((*lsmp)->lsm_oinfo);
2173 /* XXX zero *lsmp? */
2174 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
2175 LASSERT((*lsmp)->lsm_object_id);
2178 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
2183 static void filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
2184 struct filter_obd *filter)
2186 struct obdo *doa = NULL;
2191 LASSERT(oa->o_gr != 0);
2192 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
2196 CERROR("cannot allocate doa, error %d\n",
2202 doa->o_mode = S_IFREG;
2203 doa->o_gr = oa->o_gr;
2204 doa->o_valid = oa->o_valid & (OBD_MD_FLGROUP | OBD_MD_FLID);
2206 set_bit(doa->o_gr, &filter->fo_destroys_in_progress);
2207 down(&filter->fo_create_locks[doa->o_gr]);
2208 if (!test_bit(doa->o_gr, &filter->fo_destroys_in_progress)) {
2209 CERROR("%s:["LPU64"] destroy_in_progress already cleared\n",
2210 exp->exp_obd->obd_name, doa->o_gr);
2211 up(&filter->fo_create_locks[doa->o_gr]);
2212 GOTO(out_free_doa, 0);
2215 last = filter_last_id(filter, doa->o_gr);
2216 CWARN("%s:["LPU64"] deleting orphan objects from "LPU64" to "LPU64"\n",
2217 exp->exp_obd->obd_name, doa->o_gr, oa->o_id + 1, last);
2218 for (id = oa->o_id + 1; id <= last; id++) {
2220 filter_destroy(exp, doa, NULL, NULL);
2223 CDEBUG(D_HA, "%s:["LPU64"] after destroy: set last_objids = "LPU64"\n",
2224 exp->exp_obd->obd_name, doa->o_gr, oa->o_id);
2226 filter_set_last_id(filter, doa->o_gr, oa->o_id);
2228 clear_bit(doa->o_gr, &filter->fo_destroys_in_progress);
2229 up(&filter->fo_create_locks[doa->o_gr]);
2236 /* returns a negative error or a nonnegative number of files to create */
2237 static int filter_should_precreate(struct obd_export *exp, struct obdo *oa,
2240 struct obd_device *obd = exp->exp_obd;
2241 struct filter_obd *filter = &obd->u.filter;
2245 diff = oa->o_id - filter_last_id(filter, oa->o_gr);
2246 CDEBUG(D_INFO, "filter_last_id() = "LPU64" -> diff = %d\n",
2247 filter_last_id(filter, oa->o_gr), diff);
2249 /* delete orphans request */
2250 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
2251 (oa->o_flags & OBD_FL_DELORPHAN)) {
2254 if (-diff > OST_MAX_PRECREATE) {
2255 CERROR("ignoring bogus orphan destroy request: obdid "
2256 LPU64" last_id "LPU64"\n",
2257 oa->o_id, filter_last_id(filter, oa->o_gr));
2260 filter_destroy_precreated(exp, oa, filter);
2261 rc = filter_update_last_objid(obd, group, 0);
2263 CERROR("unable to write lastobjid, but orphans"
2267 /* only precreate if group == 0 and o_id is specfied */
2268 if (!(oa->o_valid & OBD_FL_DELORPHAN) &&
2269 (/*group != 0 ||*/ oa->o_id == 0))
2272 LASSERTF(diff >= 0, LPU64" - "LPU64" = %d\n", oa->o_id,
2273 filter_last_id(filter, oa->o_gr), diff);
2277 static int filter_precreate_rec(struct obd_device *obd, struct dentry *dentry,
2278 int *number, struct obdo *oa)
2283 rc = fsfilt_precreate_rec(obd, dentry, number, oa);
2288 static int filter_statfs(struct obd_device *obd, struct obd_statfs *osfs,
2289 unsigned long max_age)
2291 struct filter_obd *filter = &obd->u.filter;
2292 int blockbits = filter->fo_sb->s_blocksize_bits;
2296 /* at least try to account for cached pages. its still racey and
2297 * might be under-reporting if clients haven't announced their
2298 * caches with brw recently */
2299 spin_lock(&obd->obd_osfs_lock);
2300 rc = fsfilt_statfs(obd, filter->fo_sb, max_age);
2301 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
2302 spin_unlock(&obd->obd_osfs_lock);
2304 CDEBUG(D_SUPER | D_CACHE, "blocks cached "LPU64" granted "LPU64
2305 " pending "LPU64" free "LPU64" avail "LPU64"\n",
2306 filter->fo_tot_dirty, filter->fo_tot_granted,
2307 filter->fo_tot_pending,
2308 osfs->os_bfree << blockbits, osfs->os_bavail << blockbits);
2310 filter_grant_sanity_check(obd, __FUNCTION__);
2312 osfs->os_bavail -= min(osfs->os_bavail,
2313 (filter->fo_tot_dirty + filter->fo_tot_pending +
2314 osfs->os_bsize -1) >> blockbits);
2319 /* We rely on the fact that only one thread will be creating files in a given
2320 * group at a time, which is why we don't need an atomic filter_get_new_id.
2321 * Even if we had that atomic function, the following race would exist:
2323 * thread 1: gets id x from filter_next_id
2324 * thread 2: gets id (x + 1) from filter_next_id
2325 * thread 2: creates object (x + 1)
2326 * thread 1: tries to create object x, gets -ENOSPC
2328 static int filter_precreate(struct obd_device *obd, struct obdo *oa,
2329 obd_gr group, int *num)
2331 struct dentry *dchild = NULL, *dparent = NULL;
2332 int err = 0, rc = 0, recreate_obj = 0, i;
2333 struct filter_obd *filter;
2334 void *handle = NULL;
2336 struct obd_statfs *osfs;
2337 unsigned long enough_time = jiffies + (obd_timeout * HZ) / 3;
2341 filter = &obd->u.filter;
2343 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
2344 (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
2347 OBD_ALLOC(osfs, sizeof(*osfs));
2350 rc = filter_statfs(obd, osfs, jiffies-HZ);
2351 if (rc == 0 && osfs->os_bavail < (osfs->os_blocks >> 10)) {
2352 CDEBUG(D_HA, "OST out of space! avail "LPU64"\n",
2353 osfs->os_bavail<<filter->fo_sb->s_blocksize_bits);
2357 OBD_FREE(osfs, sizeof(*osfs));
2363 CDEBUG(D_HA, "%s: precreating %d objects\n", obd->obd_name, *num);
2365 down(&filter->fo_create_locks[group]);
2367 for (i = 0; i < *num && err == 0; i++) {
2368 int cleanup_phase = 0;
2370 if (test_bit(group, &filter->fo_destroys_in_progress)) {
2371 CWARN("%s: precreate aborted by destroy\n",
2379 last_id = filter_last_id(filter, group);
2380 if (next_id > last_id) {
2381 CERROR("Error: Trying to recreate obj greater"
2382 "than last id "LPD64" > "LPD64"\n",
2384 GOTO(cleanup, rc = -EINVAL);
2387 next_id = filter_last_id(filter, group) + 1;
2390 CDEBUG(D_INFO, "precreate objid "LPU64"\n", next_id);
2392 dparent = filter_parent_lock(obd, group, next_id, &lock);
2393 if (IS_ERR(dparent))
2394 GOTO(cleanup, rc = PTR_ERR(dparent));
2397 /*only do precreate rec record. so clean kml flags here*/
2398 fsfilt_clear_fs_flags(obd, dparent->d_inode, SM_DO_REC);
2400 dchild = filter_id2dentry(obd, dparent, group, next_id);
2402 GOTO(cleanup, rc = PTR_ERR(dchild));
2405 if (dchild->d_inode != NULL) {
2406 /* This would only happen if lastobjid was bad on disk*/
2407 /* Could also happen if recreating missing obj but
2411 CERROR("%s: recreating existing object %.*s?\n",
2412 obd->obd_name, dchild->d_name.len,
2413 dchild->d_name.name);
2415 CERROR("%s: Serious error: objid %.*s already "
2416 "exists; is this filesystem corrupt?\n",
2417 obd->obd_name, dchild->d_name.len,
2418 dchild->d_name.name);
2421 GOTO(cleanup, rc = -EEXIST);
2424 handle = fsfilt_start_log(obd, dparent->d_inode,
2425 FSFILT_OP_CREATE, NULL, 1);
2427 GOTO(cleanup, rc = PTR_ERR(handle));
2430 rc = ll_vfs_create(dparent->d_inode, dchild, S_IFREG, NULL);
2432 CERROR("create failed rc = %d\n", rc);
2436 if (!recreate_obj) {
2437 filter_set_last_id(filter, group, next_id);
2438 err = filter_update_last_objid(obd, group, 0);
2440 CERROR("unable to write lastobjid "
2441 "but file created\n");
2443 fsfilt_set_fs_flags(obd, dparent->d_inode, SM_DO_REC);
2446 switch(cleanup_phase) {
2448 err = fsfilt_commit(obd, filter->fo_sb,
2449 dparent->d_inode, handle, 0);
2451 CERROR("error on commit, err = %d\n", err);
2458 filter_parent_unlock(dparent, lock);
2465 if (time_after(jiffies, enough_time)) {
2466 CDEBUG(D_INODE,"%s: precreate slow - want %d got %d \n",
2467 obd->obd_name, *num, i);
2474 /* check if we have an error after ll_vfs_create(). It is possible that
2475 * there will be say -ENOSPC and we will leak it. */
2477 rc = filter_precreate_rec(obd, dparent, num, oa);
2479 up(&filter->fo_create_locks[group]);
2481 CDEBUG(D_HA, "%s: server last_objid for group "LPU64": "LPU64"\n",
2482 obd->obd_name, group, filter->fo_last_objids[group]);
2484 CDEBUG(D_HA, "%s: filter_precreate() created %d objects\n",
2490 static int filter_create(struct obd_export *exp, struct obdo *oa,
2491 void *acl, int acl_size,
2492 struct lov_stripe_md **ea, struct obd_trans_info *oti)
2494 struct obd_device *obd = NULL;
2495 struct filter_obd *filter;
2496 struct lvfs_run_ctxt saved;
2497 struct lov_stripe_md *lsm = NULL;
2498 struct filter_export_data *fed;
2499 char str[PTL_NALFMT_SIZE];
2500 int group = oa->o_gr, rc = 0, diff, recreate_objs = 0;
2503 LASSERT(acl == NULL && acl_size == 0);
2505 if (!(oa->o_valid & OBD_MD_FLGROUP) || group == 0) {
2506 portals_nid2str(exp->exp_connection->c_peer.peer_ni->pni_number,
2507 exp->exp_connection->c_peer.peer_id.nid, str);
2508 CERROR("!!! nid "LPX64"/%s sent invalid object group %d\n",
2509 exp->exp_connection->c_peer.peer_id.nid, str, group);
2513 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
2514 (oa->o_flags & OBD_FL_RECREATE_OBJS))
2518 fed = &exp->exp_filter_data;
2519 filter = &obd->u.filter;
2521 if (fed->fed_group != group && !recreate_objs &&
2522 !(oa->o_valid & OBD_MD_REINT)) {
2523 portals_nid2str(exp->exp_connection->c_peer.peer_ni->pni_number,
2524 exp->exp_connection->c_peer.peer_id.nid, str);
2525 CERROR("!!! This export (nid "LPX64"/%s) used object group %d "
2526 "earlier; now it's trying to use group %d! This could "
2527 "be a bug in the MDS. Tell CFS.\n",
2528 exp->exp_connection->c_peer.peer_id.nid, str,
2529 fed->fed_group, group);
2533 CDEBUG(D_INFO, "filter_create(od->o_gr=%d,od->o_id="LPU64")\n",
2538 rc = obd_alloc_memmd(exp, &lsm);
2545 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2547 if (oa->o_valid & OBD_MD_REINT) {
2548 int num = *((int*)oa->o_inline);
2549 rc = filter_precreate(obd, oa, oa->o_gr, &num);
2550 } else if (recreate_objs) {
2551 if (oa->o_id > filter_last_id(&obd->u.filter, group)) {
2552 CERROR("recreate objid "LPU64" > last id "LPU64"\n",
2553 oa->o_id, filter_last_id(&obd->u.filter, group));
2557 rc = filter_precreate(obd, oa, group, &diff);
2560 diff = filter_should_precreate(exp, oa, group);
2562 oa->o_id = filter_last_id(&obd->u.filter, group);
2563 rc = filter_precreate(obd, oa, group, &diff);
2564 oa->o_id = filter_last_id(&obd->u.filter, oa->o_gr);
2565 oa->o_valid = OBD_MD_FLID;
2569 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2570 if (rc && ea != NULL && *ea != lsm) {
2571 obd_free_memmd(exp, &lsm);
2572 } else if (rc == 0 && ea != NULL) {
2573 /* XXX LOV STACKING: the lsm that is passed to us from
2574 * LOV does not have valid lsm_oinfo data structs, so
2575 * don't go touching that. This needs to be fixed in a
2577 lsm->lsm_object_id = oa->o_id;
2578 lsm->lsm_object_gr = oa->o_gr;
2585 static int filter_destroy(struct obd_export *exp, struct obdo *oa,
2586 struct lov_stripe_md *ea, struct obd_trans_info *oti)
2588 int rc, rc2, cleanup_phase = 0, have_prepared = 0;
2589 struct dentry *dchild = NULL, *dparent = NULL;
2590 struct llog_cookie *fcc = NULL;
2591 struct lvfs_run_ctxt saved;
2592 struct filter_obd *filter;
2593 struct obd_device *obd;
2594 void *handle = NULL;
2599 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
2602 filter = &obd->u.filter;
2604 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2607 dparent = filter_parent_lock(obd, oa->o_gr, oa->o_id, &lock);
2608 if (IS_ERR(dparent))
2609 GOTO(cleanup, rc = PTR_ERR(dparent));
2612 dchild = filter_id2dentry(obd, dparent, oa->o_gr, oa->o_id);
2614 GOTO(cleanup, rc = PTR_ERR(dchild));
2617 if (dchild->d_inode == NULL) {
2618 CDEBUG(D_INODE, "destroying non-existent object "LPU64"\n",
2620 GOTO(cleanup, rc = -ENOENT);
2623 if (!have_prepared) {
2624 /* If we're really going to destroy the object, get ready
2625 * by getting the clients to discard their cached data.
2627 * We have to drop the parent lock, because
2628 * filter_prepare_destroy will acquire a PW on the object, and
2629 * we don't want to deadlock with an incoming write to the
2630 * object, which has the extent PW and then wants to get the
2631 * parent dentry to do the lookup.
2633 * We dput the child because it's not worth the extra
2634 * complication of condition the above code to skip it on the
2635 * second time through. */
2637 filter_parent_unlock(dparent, lock);
2639 filter_prepare_destroy(obd, oa->o_id, oa->o_gr);
2644 /* Our MDC connection is established by the MDS to us */
2645 if (oa->o_valid & OBD_MD_FLCOOKIE) {
2646 OBD_ALLOC(fcc, sizeof(*fcc));
2648 memcpy(fcc, obdo_logcookie(oa), sizeof(*fcc));
2651 /* we're gonna truncate it first in order to avoid possible
2654 * open trasaction open transaction
2655 * down(i_zombie) down(i_zombie)
2656 * restart transaction
2657 * (see BUG 4180) -bzzz
2659 down(&dchild->d_inode->i_sem);
2660 handle = fsfilt_start_log(obd, dparent->d_inode,FSFILT_OP_SETATTR,NULL,1);
2661 if (IS_ERR(handle)) {
2662 up(&dchild->d_inode->i_sem);
2663 GOTO(cleanup, rc = PTR_ERR(handle));
2666 iattr.ia_valid = ATTR_SIZE;
2668 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 1);
2670 rc2 = fsfilt_commit(obd, filter->fo_sb, dparent->d_inode, handle, 0);
2671 up(&dchild->d_inode->i_sem);
2675 GOTO(cleanup, rc = rc2);
2677 handle = fsfilt_start_log(obd, dparent->d_inode,FSFILT_OP_UNLINK,oti,1);
2679 GOTO(cleanup, rc = PTR_ERR(handle));
2683 rc = filter_destroy_internal(obd, oa->o_id, dparent, dchild);
2686 switch(cleanup_phase) {
2689 fsfilt_add_journal_cb(obd, filter->fo_sb, 0,
2690 oti ? oti->oti_handle : handle,
2691 filter_cancel_cookies_cb, fcc);
2693 rc = filter_finish_transno(exp, oti, rc);
2694 rc2 = fsfilt_commit(obd, filter->fo_sb, dparent->d_inode,
2695 handle, exp->exp_sync);
2697 CERROR("error on commit, err = %d\n", rc2);
2704 filter_parent_unlock(dparent, lock);
2706 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2709 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2716 /* NB start and end are used for punch, but not truncate */
2717 static int filter_truncate(struct obd_export *exp, struct obdo *oa,
2718 struct lov_stripe_md *lsm,
2719 obd_off start, obd_off end,
2720 struct obd_trans_info *oti)
2725 if (end != OBD_OBJECT_EOF)
2726 CERROR("PUNCH not supported, only truncate: end = "LPX64"\n",
2729 CDEBUG(D_INODE, "calling truncate for object "LPU64", valid = "LPU64", "
2730 "o_size = "LPD64"\n", oa->o_id, oa->o_valid, start);
2732 error = filter_setattr(exp, oa, NULL, oti);
2736 static int filter_sync(struct obd_export *exp, struct obdo *oa,
2737 struct lov_stripe_md *lsm, obd_off start, obd_off end)
2739 struct obd_device *obd = exp->exp_obd;
2740 struct lvfs_run_ctxt saved;
2741 struct filter_obd *filter;
2742 struct dentry *dentry;
2746 filter = &obd->u.filter;
2748 /* an objid of zero is taken to mean "sync whole filesystem" */
2749 if (!oa || !(oa->o_valid & OBD_MD_FLID)) {
2750 rc = fsfilt_sync(obd, filter->fo_sb);
2751 /* flush any remaining cancel messages out to the target */
2752 filter_sync_llogs(obd, NULL);
2756 dentry = filter_oa2dentry(obd, oa);
2758 RETURN(PTR_ERR(dentry));
2760 push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
2762 down(&dentry->d_inode->i_sem);
2763 rc = filemap_fdatawrite(dentry->d_inode->i_mapping);
2765 /* just any file to grab fsync method - "file" arg unused */
2766 struct file *file = filter->fo_rcvd_filp;
2768 if (file->f_op && file->f_op->fsync)
2769 rc = file->f_op->fsync(NULL, dentry, 1);
2771 rc2 = filemap_fdatawait(dentry->d_inode->i_mapping);
2775 up(&dentry->d_inode->i_sem);
2777 oa->o_valid = OBD_MD_FLID;
2778 obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
2780 pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
2786 static int filter_get_info(struct obd_export *exp, __u32 keylen,
2787 void *key, __u32 *vallen, void *val)
2789 struct filter_export_data *fed = &exp->exp_filter_data;
2790 struct obd_device *obd;
2793 obd = class_exp2obd(exp);
2795 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
2796 exp->exp_handle.h_cookie);
2800 if (keylen == strlen("blocksize") &&
2801 memcmp(key, "blocksize", keylen) == 0) {
2802 __u32 *blocksize = val;
2803 *vallen = sizeof(*blocksize);
2804 *blocksize = obd->u.filter.fo_sb->s_blocksize;
2808 if (keylen == strlen("blocksize_bits") &&
2809 memcmp(key, "blocksize_bits", keylen) == 0) {
2810 __u32 *blocksize_bits = val;
2811 *vallen = sizeof(*blocksize_bits);
2812 *blocksize_bits = obd->u.filter.fo_sb->s_blocksize_bits;
2816 if (keylen >= strlen("last_id") && memcmp(key, "last_id", 7) == 0) {
2817 obd_id *last_id = val;
2818 *last_id = filter_last_id(&obd->u.filter, fed->fed_group);
2821 if (keylen >= strlen("reint_log") && memcmp(key, "reint_log", 9) == 0) {
2822 /*Get log_context handle*/
2823 unsigned long *llh_handle = val;
2824 *vallen = sizeof(unsigned long);
2825 *llh_handle = (unsigned long)obd->obd_llog_ctxt[LLOG_REINT_ORIG_CTXT];
2828 if (keylen >= strlen("cache_sb") && memcmp(key, "cache_sb", 8) == 0) {
2829 /*Get log_context handle*/
2830 unsigned long *sb = val;
2831 *vallen = sizeof(unsigned long);
2832 *sb = (unsigned long)obd->u.filter.fo_sb;
2836 CDEBUG(D_IOCTL, "invalid key\n");
2840 struct obd_llogs *filter_grab_llog_for_group(struct obd_device *obd, int group,
2841 struct obd_export *export)
2843 struct filter_group_llog *fglog, *nlog;
2844 char name[32] = "CATLIST";
2845 struct filter_obd *filter;
2846 struct llog_ctxt *ctxt;
2847 struct list_head *cur;
2850 filter = &obd->u.filter;
2852 spin_lock(&filter->fo_llog_list_lock);
2853 list_for_each(cur, &filter->fo_llog_list) {
2854 fglog = list_entry(cur, struct filter_group_llog, list);
2855 if (fglog->group == group) {
2856 if (!(fglog->exp == NULL || fglog->exp == export || export == NULL))
2857 CWARN("%s: export for group %d changes: 0x%p -> 0x%p\n",
2858 obd->obd_name, group, fglog->exp, export);
2859 spin_unlock(&filter->fo_llog_list_lock);
2863 spin_unlock(&filter->fo_llog_list_lock);
2868 OBD_ALLOC(fglog, sizeof(*fglog));
2871 fglog->group = group;
2873 OBD_ALLOC(fglog->llogs, sizeof(struct obd_llogs));
2874 if (fglog->llogs == NULL) {
2875 OBD_FREE(fglog, sizeof(*fglog));
2879 spin_lock(&filter->fo_llog_list_lock);
2880 list_for_each(cur, &filter->fo_llog_list) {
2881 nlog = list_entry(cur, struct filter_group_llog, list);
2882 LASSERT(nlog->group != group);
2884 list_add(&fglog->list, &filter->fo_llog_list);
2885 spin_unlock(&filter->fo_llog_list_lock);
2887 rc = obd_llog_cat_initialize(obd, fglog->llogs, 1, name);
2889 OBD_FREE(fglog->llogs, sizeof(*(fglog->llogs)));
2890 OBD_FREE(fglog, sizeof(*fglog));
2896 fglog->exp = export;
2897 ctxt = llog_get_context(fglog->llogs, LLOG_UNLINK_REPL_CTXT);
2898 LASSERT(ctxt != NULL);
2900 llog_receptor_accept(ctxt, export->exp_imp_reverse);
2902 CDEBUG(D_OTHER, "%s: new llog 0x%p for group %u\n",
2903 obd->obd_name, fglog->llogs, group);
2905 RETURN(fglog->llogs);
2908 int filter_iocontrol(unsigned int cmd, struct obd_export *exp,
2909 int len, void *karg, void *uarg)
2911 struct obd_device *obd = exp->exp_obd;
2912 struct obd_ioctl_data *data = karg;
2916 case OBD_IOC_ABORT_RECOVERY:
2917 target_stop_recovery_thread(obd);
2920 case OBD_IOC_SET_READONLY: {
2922 struct super_block *sb = obd->u.filter.fo_sb;
2923 struct inode *inode = sb->s_root->d_inode;
2924 BDEVNAME_DECLARE_STORAGE(tmp);
2925 CERROR("setting device %s read-only\n",
2926 ll_bdevname(sb, tmp));
2928 handle = fsfilt_start(obd, inode, FSFILT_OP_MKNOD, NULL);
2930 (void)fsfilt_commit(obd, sb, inode, handle, 1);
2932 ll_set_rdonly(ll_sbdev(obd->u.filter.fo_sb));
2936 case OBD_IOC_CATLOGLIST: {
2937 rc = llog_catalog_list(obd, 1, data);
2940 case OBD_IOC_LLOG_CANCEL:
2941 case OBD_IOC_LLOG_REMOVE:
2942 case OBD_IOC_LLOG_INFO:
2943 case OBD_IOC_LLOG_PRINT: {
2944 /* FIXME to be finished */
2945 RETURN(-EOPNOTSUPP);
2947 struct llog_ctxt *ctxt = NULL;
2949 push_ctxt(&saved, &ctxt->loc_ctxt, NULL);
2950 rc = llog_ioctl(ctxt, cmd, data);
2951 pop_ctxt(&saved, &ctxt->loc_ctxt, NULL);
2964 static struct llog_operations filter_unlink_repl_logops;
2965 static struct llog_operations filter_size_orig_logops = {
2966 lop_setup: llog_obd_origin_setup,
2967 lop_cleanup: llog_catalog_cleanup,
2968 lop_add: llog_catalog_add,
2971 static int filter_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
2972 struct obd_device *tgt, int count,
2973 struct llog_catid *catid)
2975 struct llog_ctxt *ctxt;
2979 filter_unlink_repl_logops = llog_client_ops;
2980 filter_unlink_repl_logops.lop_cancel = llog_obd_repl_cancel;
2981 filter_unlink_repl_logops.lop_connect = llog_repl_connect;
2982 filter_unlink_repl_logops.lop_sync = llog_obd_repl_sync;
2984 rc = obd_llog_setup(obd, llogs, LLOG_UNLINK_REPL_CTXT, tgt, 0, NULL,
2985 &filter_unlink_repl_logops);
2988 /* FIXME - assign unlink_cb for filter's recovery */
2989 ctxt = llog_get_context(llogs, LLOG_UNLINK_REPL_CTXT);
2990 ctxt->llog_proc_cb = filter_recov_log_unlink_cb;
2992 /* FIXME - count should be 1 to setup size log */
2993 rc = obd_llog_setup(obd, llogs, LLOG_SIZE_ORIG_CTXT, tgt, 0,
2994 &catid->lci_logid, &filter_size_orig_logops);
2998 static int filter_llog_finish(struct obd_device *obd,
2999 struct obd_llogs *llogs, int count)
3004 rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_UNLINK_REPL_CTXT));
3008 rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_SIZE_ORIG_CTXT));
3012 static int filter_llog_connect(struct obd_export *exp,
3013 struct llogd_conn_body *body)
3015 struct obd_device *obd = exp->exp_obd;
3016 struct llog_ctxt *ctxt;
3017 struct obd_llogs *llog;
3021 CDEBUG(D_OTHER, "handle connect for %s: %u/%u/%u\n", obd->obd_name,
3022 (unsigned) body->lgdc_logid.lgl_ogr,
3023 (unsigned) body->lgdc_logid.lgl_oid,
3024 (unsigned) body->lgdc_logid.lgl_ogen);
3025 llog = filter_grab_llog_for_group(obd, body->lgdc_logid.lgl_ogr, exp);
3026 LASSERT(llog != NULL);
3027 ctxt = llog_get_context(llog, body->lgdc_ctxt_idx);
3028 rc = llog_connect(ctxt, 1, &body->lgdc_logid,
3029 &body->lgdc_gen, NULL);
3031 CERROR("failed to connect\n");
3036 static struct dentry *filter_lvfs_id2dentry(__u64 id, __u32 gen,
3037 __u64 gr, void *data)
3039 return filter_id2dentry(data, NULL, gr, id);
3042 static struct lvfs_callback_ops filter_lvfs_ops = {
3043 l_id2dentry: filter_lvfs_id2dentry,
3046 static struct obd_ops filter_obd_ops = {
3047 .o_owner = THIS_MODULE,
3048 .o_attach = filter_attach,
3049 .o_detach = filter_detach,
3050 .o_get_info = filter_get_info,
3051 .o_setup = filter_setup,
3052 .o_precleanup = filter_precleanup,
3053 .o_cleanup = filter_cleanup,
3054 .o_connect = filter_connect,
3055 .o_connect_post = filter_connect_post,
3056 .o_disconnect = filter_disconnect,
3057 .o_statfs = filter_statfs,
3058 .o_getattr = filter_getattr,
3059 .o_unpackmd = filter_unpackmd,
3060 .o_create = filter_create,
3061 .o_setattr = filter_setattr,
3062 .o_destroy = filter_destroy,
3063 .o_brw = filter_brw,
3064 .o_punch = filter_truncate,
3065 .o_sync = filter_sync,
3066 .o_preprw = filter_preprw,
3067 .o_commitrw = filter_commitrw,
3068 .o_do_cow = filter_do_cow,
3069 .o_write_extents = filter_write_extents,
3070 .o_destroy_export = filter_destroy_export,
3071 .o_llog_init = filter_llog_init,
3072 .o_llog_finish = filter_llog_finish,
3073 .o_llog_connect = filter_llog_connect,
3074 .o_iocontrol = filter_iocontrol,
3077 static struct obd_ops filter_sanobd_ops = {
3078 .o_owner = THIS_MODULE,
3079 .o_attach = filter_attach,
3080 .o_detach = filter_detach,
3081 .o_get_info = filter_get_info,
3082 .o_setup = filter_san_setup,
3083 .o_precleanup = filter_precleanup,
3084 .o_cleanup = filter_cleanup,
3085 .o_connect = filter_connect,
3086 .o_connect_post = filter_connect_post,
3087 .o_disconnect = filter_disconnect,
3088 .o_statfs = filter_statfs,
3089 .o_getattr = filter_getattr,
3090 .o_unpackmd = filter_unpackmd,
3091 .o_create = filter_create,
3092 .o_setattr = filter_setattr,
3093 .o_destroy = filter_destroy,
3094 .o_brw = filter_brw,
3095 .o_punch = filter_truncate,
3096 .o_sync = filter_sync,
3097 .o_preprw = filter_preprw,
3098 .o_commitrw = filter_commitrw,
3099 .o_do_cow = filter_do_cow,
3100 .o_write_extents = filter_write_extents,
3101 .o_san_preprw = filter_san_preprw,
3102 .o_destroy_export = filter_destroy_export,
3103 .o_llog_init = filter_llog_init,
3104 .o_llog_finish = filter_llog_finish,
3105 .o_llog_connect = filter_llog_connect,
3106 .o_iocontrol = filter_iocontrol,
3109 static int __init obdfilter_init(void)
3111 struct lprocfs_static_vars lvars;
3114 printk(KERN_INFO "Lustre: Filtering OBD driver; info@clusterfs.com\n");
3116 lprocfs_init_vars(filter, &lvars);
3118 size = OBDFILTER_CREATED_SCRATCHPAD_ENTRIES *
3119 sizeof(*obdfilter_created_scratchpad);
3121 OBD_ALLOC(obdfilter_created_scratchpad, size);
3122 if (obdfilter_created_scratchpad == NULL) {
3123 CERROR ("Can't allocate scratchpad\n");
3127 rc = class_register_type(&filter_obd_ops, NULL, lvars.module_vars,
3128 OBD_FILTER_DEVICENAME);
3130 OBD_FREE(obdfilter_created_scratchpad, size);
3134 rc = class_register_type(&filter_sanobd_ops, NULL, lvars.module_vars,
3135 OBD_FILTER_SAN_DEVICENAME);
3137 class_unregister_type(OBD_FILTER_DEVICENAME);
3138 OBD_FREE(obdfilter_created_scratchpad, size);
3143 static void __exit obdfilter_exit(void)
3145 class_unregister_type(OBD_FILTER_SAN_DEVICENAME);
3146 class_unregister_type(OBD_FILTER_DEVICENAME);
3147 OBD_FREE(obdfilter_created_scratchpad,
3148 OBDFILTER_CREATED_SCRATCHPAD_ENTRIES *
3149 sizeof(*obdfilter_created_scratchpad));
3152 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
3153 MODULE_DESCRIPTION("Lustre Filtering OBD driver");
3154 MODULE_LICENSE("GPL");
3156 module_init(obdfilter_init);
3157 module_exit(obdfilter_exit);