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 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
45 # include <linux/mount.h>
46 # include <linux/buffer_head.h>
49 #include <linux/obd_class.h>
50 #include <linux/obd_lov.h>
51 #include <linux/lustre_dlm.h>
52 #include <linux/lustre_fsfilt.h>
53 #include <linux/lprocfs_status.h>
54 #include <linux/lustre_log.h>
55 #include <linux/lustre_commit_confd.h>
56 #include <portals/list.h>
58 #include "filter_internal.h"
60 static struct lvfs_callback_ops filter_lvfs_ops;
62 static int filter_destroy(struct obd_export *exp, struct obdo *oa,
63 struct lov_stripe_md *ea, struct obd_trans_info *);
65 static void filter_commit_cb(struct obd_device *obd, __u64 transno,
66 void *cb_data, int error)
68 obd_transno_commit_cb(obd, transno, error);
72 /* Assumes caller has already pushed us into the kernel context. */
73 int filter_finish_transno(struct obd_export *exp, struct obd_trans_info *oti,
76 struct filter_obd *filter = &exp->exp_obd->u.filter;
77 struct filter_export_data *fed = &exp->exp_filter_data;
78 struct filter_client_data *fcd = fed->fed_fcd;
81 int err, log_pri = D_HA;
83 /* Propagate error code. */
87 if (!exp->exp_obd->obd_replayable || oti == NULL)
90 /* we don't allocate new transnos for replayed requests */
91 if (oti->oti_transno == 0) {
92 spin_lock(&filter->fo_translock);
93 last_rcvd = le64_to_cpu(filter->fo_fsd->fsd_last_transno) + 1;
94 filter->fo_fsd->fsd_last_transno = cpu_to_le64(last_rcvd);
95 spin_unlock(&filter->fo_translock);
96 oti->oti_transno = last_rcvd;
98 spin_lock(&filter->fo_translock);
99 last_rcvd = oti->oti_transno;
100 if (last_rcvd > le64_to_cpu(filter->fo_fsd->fsd_last_transno))
101 filter->fo_fsd->fsd_last_transno =
102 cpu_to_le64(last_rcvd);
103 spin_unlock(&filter->fo_translock);
105 fcd->fcd_last_rcvd = cpu_to_le64(last_rcvd);
107 /* could get xid from oti, if it's ever needed */
108 fcd->fcd_last_xid = 0;
110 off = fed->fed_lr_off;
111 fsfilt_add_journal_cb(exp->exp_obd, last_rcvd, oti->oti_handle,
112 filter_commit_cb, NULL);
113 err = fsfilt_write_record(exp->exp_obd, filter->fo_rcvd_filp, fcd,
114 sizeof(*fcd), &off, 0);
121 CDEBUG(log_pri, "wrote trans "LPU64" for client %s at #%d: err = %d\n",
122 last_rcvd, fcd->fcd_uuid, fed->fed_lr_idx, err);
127 void f_dput(struct dentry *dentry)
129 /* Can't go inside filter_ddelete because it can block */
130 CDEBUG(D_INODE, "putting %s: %p, count = %d\n",
131 dentry->d_name.name, dentry, atomic_read(&dentry->d_count) - 1);
132 LASSERT(atomic_read(&dentry->d_count) > 0);
137 /* Add client data to the FILTER. We use a bitmap to locate a free space
138 * in the last_rcvd file if cl_idx is -1 (i.e. a new client).
139 * Otherwise, we have just read the data from the last_rcvd file and
140 * we know its offset. */
141 static int filter_client_add(struct obd_device *obd, struct filter_obd *filter,
142 struct filter_export_data *fed, int cl_idx)
144 unsigned long *bitmap = filter->fo_last_rcvd_slots;
145 int new_client = (cl_idx == -1);
148 LASSERT(bitmap != NULL);
150 /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
151 if (!strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid))
154 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
155 * there's no need for extra complication here
158 cl_idx = find_first_zero_bit(bitmap, FILTER_LR_MAX_CLIENTS);
160 if (cl_idx >= FILTER_LR_MAX_CLIENTS) {
161 CERROR("no client slots - fix FILTER_LR_MAX_CLIENTS\n");
164 if (test_and_set_bit(cl_idx, bitmap)) {
165 CERROR("FILTER client %d: found bit is set in bitmap\n",
167 cl_idx = find_next_zero_bit(bitmap,
168 FILTER_LR_MAX_CLIENTS,
173 if (test_and_set_bit(cl_idx, bitmap)) {
174 CERROR("FILTER client %d: bit already set in bitmap!\n",
180 fed->fed_lr_idx = cl_idx;
181 fed->fed_lr_off = le32_to_cpu(filter->fo_fsd->fsd_client_start) +
182 cl_idx * le16_to_cpu(filter->fo_fsd->fsd_client_size);
184 CDEBUG(D_INFO, "client at index %d (%llu) with UUID '%s' added\n",
185 fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
188 struct obd_run_ctxt saved;
189 loff_t off = fed->fed_lr_off;
193 CDEBUG(D_INFO, "writing client fcd at idx %u (%llu) (len %u)\n",
194 fed->fed_lr_idx,off,(unsigned int)sizeof(*fed->fed_fcd));
196 push_ctxt(&saved, &obd->obd_ctxt, NULL);
197 /* Transaction needed to fix bug 1403 */
198 handle = fsfilt_start(obd,
199 filter->fo_rcvd_filp->f_dentry->d_inode,
200 FSFILT_OP_SETATTR, NULL);
201 if (IS_ERR(handle)) {
202 err = PTR_ERR(handle);
203 CERROR("unable to start transaction: rc %d\n", err);
205 err = fsfilt_write_record(obd, filter->fo_rcvd_filp,
207 sizeof(*fed->fed_fcd),
210 filter->fo_rcvd_filp->f_dentry->d_inode,
213 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
216 CERROR("error writing %s client idx %u: rc %d\n",
217 LAST_RCVD, fed->fed_lr_idx, err);
224 static int filter_client_free(struct obd_export *exp, int flags)
226 struct filter_export_data *fed = &exp->exp_filter_data;
227 struct filter_obd *filter = &exp->exp_obd->u.filter;
228 struct obd_device *obd = exp->exp_obd;
229 struct filter_client_data zero_fcd;
230 struct obd_run_ctxt saved;
235 if (fed->fed_fcd == NULL)
238 if (flags & OBD_OPT_FAILOVER)
241 /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
242 if (strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid ) == 0)
245 LASSERT(filter->fo_last_rcvd_slots != NULL);
247 off = fed->fed_lr_off;
249 CDEBUG(D_INFO, "freeing client at idx %u (%lld) with UUID '%s'\n",
250 fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
252 /* Clear the bit _after_ zeroing out the client so we don't
253 race with filter_client_add and zero out new clients.*/
254 if (!test_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
255 CERROR("FILTER client %u: bit already clear in bitmap!!\n",
260 memset(&zero_fcd, 0, sizeof zero_fcd);
261 push_ctxt(&saved, &obd->obd_ctxt, NULL);
262 rc = fsfilt_write_record(obd, filter->fo_rcvd_filp, &zero_fcd,
263 sizeof(zero_fcd), &off, 1);
264 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
266 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
267 "zeroing disconnecting client %s at idx %u (%llu) in %s rc %d\n",
268 fed->fed_fcd->fcd_uuid, fed->fed_lr_idx, fed->fed_lr_off,
271 if (!test_and_clear_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
272 CERROR("FILTER client %u: bit already clear in bitmap!!\n",
278 OBD_FREE(fed->fed_fcd, sizeof(*fed->fed_fcd));
283 static int filter_free_server_data(struct filter_obd *filter)
285 OBD_FREE(filter->fo_fsd, sizeof(*filter->fo_fsd));
286 filter->fo_fsd = NULL;
287 OBD_FREE(filter->fo_last_rcvd_slots,
288 FILTER_LR_MAX_CLIENT_WORDS * sizeof(unsigned long));
289 filter->fo_last_rcvd_slots = NULL;
293 /* assumes caller is already in kernel ctxt */
294 int filter_update_server_data(struct obd_device *obd, struct file *filp,
295 struct filter_server_data *fsd, int force_sync)
301 CDEBUG(D_INODE, "server uuid : %s\n", fsd->fsd_uuid);
302 CDEBUG(D_INODE, "server last_rcvd : "LPU64"\n",
303 le64_to_cpu(fsd->fsd_last_transno));
304 CDEBUG(D_INODE, "server last_mount: "LPU64"\n",
305 le64_to_cpu(fsd->fsd_mount_count));
307 rc = fsfilt_write_record(obd, filp, fsd, sizeof(*fsd), &off,force_sync);
309 CERROR("error writing filter_server_data: rc = %d\n", rc);
314 int filter_update_last_objid(struct obd_device *obd, obd_gr group,
317 struct filter_obd *filter = &obd->u.filter;
323 CDEBUG(D_INODE, "server last_objid for group "LPU64": "LPU64"\n",
324 group, filter->fo_last_objids[group]);
326 tmp = cpu_to_le64(filter->fo_last_objids[group]);
327 rc = fsfilt_write_record(obd, filter->fo_last_objid_files[group],
328 &tmp, sizeof(tmp), &off, force_sync);
330 CERROR("error writing group "LPU64" last objid: rc = %d\n",
335 /* assumes caller has already in kernel ctxt */
336 static int filter_init_server_data(struct obd_device *obd, struct file * filp)
338 struct filter_obd *filter = &obd->u.filter;
339 struct filter_server_data *fsd;
340 struct filter_client_data *fcd = NULL;
341 struct inode *inode = filp->f_dentry->d_inode;
342 unsigned long last_rcvd_size = inode->i_size;
348 /* ensure padding in the struct is the correct size */
349 LASSERT (offsetof(struct filter_server_data, fsd_padding) +
350 sizeof(fsd->fsd_padding) == FILTER_LR_SERVER_SIZE);
351 LASSERT (offsetof(struct filter_client_data, fcd_padding) +
352 sizeof(fcd->fcd_padding) == FILTER_LR_CLIENT_SIZE);
354 OBD_ALLOC(fsd, sizeof(*fsd));
357 filter->fo_fsd = fsd;
359 OBD_ALLOC(filter->fo_last_rcvd_slots,
360 FILTER_LR_MAX_CLIENT_WORDS * sizeof(unsigned long));
361 if (filter->fo_last_rcvd_slots == NULL) {
362 OBD_FREE(fsd, sizeof(*fsd));
366 if (last_rcvd_size == 0) {
367 CWARN("%s: initializing new %s\n", obd->obd_name, LAST_RCVD);
369 memcpy(fsd->fsd_uuid, obd->obd_uuid.uuid,sizeof(fsd->fsd_uuid));
370 fsd->fsd_last_transno = 0;
371 mount_count = fsd->fsd_mount_count = 0;
372 fsd->fsd_server_size = cpu_to_le32(FILTER_LR_SERVER_SIZE);
373 fsd->fsd_client_start = cpu_to_le32(FILTER_LR_CLIENT_START);
374 fsd->fsd_client_size = cpu_to_le16(FILTER_LR_CLIENT_SIZE);
375 fsd->fsd_subdir_count = cpu_to_le16(FILTER_SUBDIR_COUNT);
376 filter->fo_subdir_count = FILTER_SUBDIR_COUNT;
378 rc = fsfilt_read_record(obd, filp, fsd, sizeof(*fsd), &off);
380 CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
384 if (strcmp(fsd->fsd_uuid, obd->obd_uuid.uuid) != 0) {
385 CERROR("OBD UUID %s does not match last_rcvd UUID %s\n",
386 obd->obd_uuid.uuid, fsd->fsd_uuid);
387 GOTO(err_fsd, rc = -EINVAL);
389 mount_count = le64_to_cpu(fsd->fsd_mount_count);
390 filter->fo_subdir_count = le16_to_cpu(fsd->fsd_subdir_count);
393 if (fsd->fsd_feature_incompat & ~cpu_to_le32(FILTER_INCOMPAT_SUPP)) {
394 CERROR("unsupported feature %x\n",
395 le32_to_cpu(fsd->fsd_feature_incompat) &
396 ~FILTER_INCOMPAT_SUPP);
397 GOTO(err_fsd, rc = -EINVAL);
399 if (fsd->fsd_feature_rocompat & ~cpu_to_le32(FILTER_ROCOMPAT_SUPP)) {
400 CERROR("read-only feature %x\n",
401 le32_to_cpu(fsd->fsd_feature_rocompat) &
402 ~FILTER_ROCOMPAT_SUPP);
403 /* Do something like remount filesystem read-only */
404 GOTO(err_fsd, rc = -EINVAL);
407 CDEBUG(D_INODE, "%s: server last_rcvd : "LPU64"\n",
408 obd->obd_name, le64_to_cpu(fsd->fsd_last_transno));
409 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
410 obd->obd_name, mount_count + 1);
411 CDEBUG(D_INODE, "%s: server data size: %u\n",
412 obd->obd_name, le32_to_cpu(fsd->fsd_server_size));
413 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
414 obd->obd_name, le32_to_cpu(fsd->fsd_client_start));
415 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
416 obd->obd_name, le32_to_cpu(fsd->fsd_client_size));
417 CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
418 obd->obd_name, le16_to_cpu(fsd->fsd_subdir_count));
419 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
420 last_rcvd_size <= le32_to_cpu(fsd->fsd_client_start) ? 0 :
421 (last_rcvd_size - le32_to_cpu(fsd->fsd_client_start)) /
422 le16_to_cpu(fsd->fsd_client_size));
424 if (!obd->obd_replayable) {
425 CWARN("%s: recovery support OFF\n", obd->obd_name);
429 for (cl_idx = 0, off = le32_to_cpu(fsd->fsd_client_start);
430 off < last_rcvd_size; cl_idx++) {
432 struct obd_export *exp;
433 struct filter_export_data *fed;
436 OBD_ALLOC(fcd, sizeof(*fcd));
438 GOTO(err_client, rc = -ENOMEM);
441 /* Don't assume off is incremented properly by
442 * fsfilt_read_record(), in case sizeof(*fcd)
443 * isn't the same as fsd->fsd_client_size. */
444 off = le32_to_cpu(fsd->fsd_client_start) +
445 cl_idx * le16_to_cpu(fsd->fsd_client_size);
446 rc = fsfilt_read_record(obd, filp, fcd, sizeof(*fcd), &off);
448 CERROR("error reading FILT %s idx %d off %llu: rc %d\n",
449 LAST_RCVD, cl_idx, off, rc);
450 break; /* read error shouldn't cause startup to fail */
453 if (fcd->fcd_uuid[0] == '\0') {
454 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
459 last_rcvd = le64_to_cpu(fcd->fcd_last_rcvd);
461 /* These exports are cleaned up by filter_disconnect(), so they
462 * need to be set up like real exports as filter_connect() does.
464 exp = class_new_export(obd);
465 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
466 " srv lr: "LPU64"\n", fcd->fcd_uuid, cl_idx,
467 last_rcvd, le64_to_cpu(fsd->fsd_last_transno));
469 GOTO(err_client, rc = -ENOMEM);
471 memcpy(&exp->exp_client_uuid.uuid, fcd->fcd_uuid,
472 sizeof exp->exp_client_uuid.uuid);
473 fed = &exp->exp_filter_data;
475 filter_client_add(obd, filter, fed, cl_idx);
476 /* create helper if export init gets more complex */
477 spin_lock_init(&fed->fed_lock);
480 obd->obd_recoverable_clients++;
481 class_export_put(exp);
483 CDEBUG(D_OTHER, "client at idx %d has last_rcvd = "LPU64"\n",
486 if (last_rcvd > le64_to_cpu(fsd->fsd_last_transno))
487 fsd->fsd_last_transno = cpu_to_le64(last_rcvd);
491 obd->obd_last_committed = le64_to_cpu(fsd->fsd_last_transno);
493 if (obd->obd_recoverable_clients) {
494 CWARN("RECOVERY: %d recoverable clients, last_rcvd "
495 LPU64"\n", obd->obd_recoverable_clients,
496 le64_to_cpu(fsd->fsd_last_transno));
497 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
498 obd->obd_recovering = 1;
502 OBD_FREE(fcd, sizeof(*fcd));
505 filter->fo_mount_count = mount_count + 1;
506 fsd->fsd_mount_count = cpu_to_le64(filter->fo_mount_count);
508 /* save it, so mount count and last_transno is current */
509 rc = filter_update_server_data(obd, filp, filter->fo_fsd, 1);
514 class_disconnect_exports(obd, 0);
516 filter_free_server_data(filter);
520 static int filter_cleanup_groups(struct obd_device *obd)
522 struct filter_obd *filter = &obd->u.filter;
526 if (filter->fo_dentry_O_groups != NULL &&
527 filter->fo_last_objids != NULL &&
528 filter->fo_last_objid_files != NULL) {
529 for (i = 0; i < FILTER_GROUPS; i++) {
530 struct dentry *dentry = filter->fo_dentry_O_groups[i];
531 struct file *filp = filter->fo_last_objid_files[i];
532 if (dentry != NULL) {
534 filter->fo_dentry_O_groups[i] = NULL;
538 filter->fo_last_objid_files[i] = NULL;
542 if (filter->fo_dentry_O_sub != NULL && filter->fo_subdir_count) {
543 for (i = 0; i < filter->fo_subdir_count; i++) {
544 struct dentry *dentry = filter->fo_dentry_O_sub[i];
545 if (dentry != NULL) {
547 filter->fo_dentry_O_sub[i] = NULL;
550 OBD_FREE(filter->fo_dentry_O_sub,
551 filter->fo_subdir_count *
552 sizeof(*filter->fo_dentry_O_sub));
554 if (filter->fo_dentry_O_groups != NULL)
555 OBD_FREE(filter->fo_dentry_O_groups,
556 FILTER_GROUPS * sizeof(struct dentry *));
557 if (filter->fo_last_objids != NULL)
558 OBD_FREE(filter->fo_last_objids,
559 FILTER_GROUPS * sizeof(__u64));
560 if (filter->fo_last_objid_files != NULL)
561 OBD_FREE(filter->fo_last_objid_files,
562 FILTER_GROUPS * sizeof(struct file *));
563 if (filter->fo_dentry_O != NULL)
564 f_dput(filter->fo_dentry_O);
568 /* FIXME: object groups */
569 static int filter_prep_groups(struct obd_device *obd)
571 struct filter_obd *filter = &obd->u.filter;
572 struct dentry *dentry, *O_dentry;
574 int i, rc = 0, cleanup_phase = 0;
577 O_dentry = simple_mkdir(current->fs->pwd, "O", 0700, 1);
578 CDEBUG(D_INODE, "got/created O: %p\n", O_dentry);
579 if (IS_ERR(O_dentry)) {
580 rc = PTR_ERR(O_dentry);
581 CERROR("cannot open/create O: rc = %d\n", rc);
584 filter->fo_dentry_O = O_dentry;
585 cleanup_phase = 1; /* O_dentry */
587 /* Lookup "R" to tell if we're on an old OST FS and need to convert
588 * from O/R/<dir>/<objid> to O/0/<dir>/<objid>. This can be removed
589 * some time post 1.0 when all old-style OSTs have converted along
590 * with the init_objid hack. */
591 dentry = ll_lookup_one_len("R", O_dentry, 1);
593 GOTO(cleanup, rc = PTR_ERR(dentry));
594 if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)) {
595 struct dentry *O0_dentry = lookup_one_len("0", O_dentry, 1);
598 CWARN("converting OST to new object layout\n");
599 if (IS_ERR(O0_dentry)) {
600 rc = PTR_ERR(O0_dentry);
601 CERROR("error looking up O/0: rc %d\n", rc);
605 if (O0_dentry->d_inode) {
606 CERROR("Both O/R and O/0 exist. Fix manually.\n");
607 GOTO(cleanup_O0, rc = -EEXIST);
610 down(&O_dentry->d_inode->i_sem);
611 rc = vfs_rename(O_dentry->d_inode, dentry,
612 O_dentry->d_inode, O0_dentry);
613 up(&O_dentry->d_inode->i_sem);
616 CERROR("error renaming O/R to O/0: rc %d\n", rc);
617 GOTO(cleanup_O0, rc);
619 filter->fo_fsd->fsd_feature_incompat |=
620 cpu_to_le32(FILTER_INCOMPAT_GROUPS);
621 rc = filter_update_server_data(obd, filter->fo_rcvd_filp,
623 GOTO(cleanup_O0, rc);
635 OBD_ALLOC(filter->fo_last_objids, FILTER_GROUPS * sizeof(__u64));
636 if (filter->fo_last_objids == NULL)
637 GOTO(cleanup, rc = -ENOMEM);
638 cleanup_phase = 2; /* groups */
640 OBD_ALLOC(filter->fo_dentry_O_groups, FILTER_GROUPS * sizeof(dentry));
641 if (filter->fo_dentry_O_groups == NULL)
642 GOTO(cleanup, rc = -ENOMEM);
643 OBD_ALLOC(filter->fo_last_objid_files, FILTER_GROUPS * sizeof(filp));
644 if (filter->fo_last_objid_files == NULL)
645 GOTO(cleanup, rc = -ENOMEM);
647 for (i = 0; i < FILTER_GROUPS; i++) {
651 sprintf(name, "%d", i);
652 dentry = simple_mkdir(O_dentry, name, 0700, 1);
653 CDEBUG(D_INODE, "got/created O/%s: %p\n", name, dentry);
654 if (IS_ERR(dentry)) {
655 rc = PTR_ERR(dentry);
656 CERROR("cannot lookup/create O/%s: rc = %d\n",
660 filter->fo_dentry_O_groups[i] = dentry;
662 sprintf(name, "O/%d/LAST_ID", i);
663 filp = filp_open(name, O_CREAT | O_RDWR, 0700);
666 CERROR("cannot create %s: rc = %d\n", name, rc);
669 filter->fo_last_objid_files[i] = filp;
671 if (filp->f_dentry->d_inode->i_size == 0) {
672 if (i == 0 && filter->fo_fsd->fsd_unused != 0) {
673 /* OST conversion, remove sometime post 1.0 */
674 filter->fo_last_objids[i] =
675 le64_to_cpu(filter->fo_fsd->fsd_unused);
676 CWARN("saving old objid "LPU64" to LAST_ID\n",
677 filter->fo_last_objids[i]);
678 rc = filter_update_last_objid(obd, 0, 1);
682 filter->fo_last_objids[i] = FILTER_INIT_OBJID;
687 rc = fsfilt_read_record(obd, filp, &filter->fo_last_objids[i],
688 sizeof(__u64), &off);
690 CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
694 filter->fo_last_objids[i] =
695 le64_to_cpu(filter->fo_last_objids[i]);
696 CDEBUG(D_INODE, "%s: server last_objid group %d: "LPU64"\n",
697 obd->obd_name, i, filter->fo_last_objids[i]);
700 if (filter->fo_subdir_count) {
701 O_dentry = filter->fo_dentry_O_groups[0];
702 OBD_ALLOC(filter->fo_dentry_O_sub,
703 filter->fo_subdir_count * sizeof(dentry));
704 if (filter->fo_dentry_O_sub == NULL)
705 GOTO(cleanup, rc = -ENOMEM);
707 for (i = 0; i < filter->fo_subdir_count; i++) {
709 snprintf(dir, sizeof(dir), "d%u", i);
711 dentry = simple_mkdir(O_dentry, dir, 0700, 1);
712 CDEBUG(D_INODE, "got/created O/0/%s: %p\n", dir,dentry);
713 if (IS_ERR(dentry)) {
714 rc = PTR_ERR(dentry);
715 CERROR("can't lookup/create O/0/%s: rc = %d\n",
719 filter->fo_dentry_O_sub[i] = dentry;
725 filter_cleanup_groups(obd);
729 /* setup the object store with correct subdirectories */
730 static int filter_prep(struct obd_device *obd)
732 struct obd_run_ctxt saved;
733 struct filter_obd *filter = &obd->u.filter;
739 push_ctxt(&saved, &obd->obd_ctxt, NULL);
740 file = filp_open(LAST_RCVD, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
741 if (!file || IS_ERR(file)) {
743 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
748 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
749 CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
750 file->f_dentry->d_inode->i_mode);
751 GOTO(err_filp, rc = -ENOENT);
754 /* steal operations */
755 inode = file->f_dentry->d_inode;
756 filter->fo_fop = file->f_op;
757 filter->fo_iop = inode->i_op;
758 filter->fo_aops = inode->i_mapping->a_ops;
760 rc = filter_init_server_data(obd, file);
762 CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
765 filter->fo_rcvd_filp = file;
767 rc = filter_prep_groups(obd);
769 GOTO(err_server_data, rc);
772 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
777 //class_disconnect_exports(obd, 0);
778 filter_free_server_data(filter);
780 if (filp_close(file, 0))
781 CERROR("can't close %s after error\n", LAST_RCVD);
782 filter->fo_rcvd_filp = NULL;
786 /* cleanup the filter: write last used object id to status file */
787 static void filter_post(struct obd_device *obd)
789 struct obd_run_ctxt saved;
790 struct filter_obd *filter = &obd->u.filter;
793 /* XXX: filter_update_lastobjid used to call fsync_dev. It might be
794 * best to start a transaction with h_sync, because we removed this
797 push_ctxt(&saved, &obd->obd_ctxt, NULL);
798 rc = filter_update_server_data(obd, filter->fo_rcvd_filp,
801 CERROR("error writing server data: rc = %d\n", rc);
803 for (i = 0; i < FILTER_GROUPS; i++) {
804 rc = filter_update_last_objid(obd, i, (i == FILTER_GROUPS - 1));
806 CERROR("error writing group %d lastobjid: rc = %d\n",
810 rc = filp_close(filter->fo_rcvd_filp, 0);
811 filter->fo_rcvd_filp = NULL;
813 CERROR("error closing %s: rc = %d\n", LAST_RCVD, rc);
815 filter_cleanup_groups(obd);
816 filter_free_server_data(filter);
817 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
820 static void filter_set_last_id(struct filter_obd *filter, struct obdo *oa,
824 LASSERT(filter->fo_fsd != NULL);
827 LASSERT(oa->o_gr <= FILTER_GROUPS);
831 spin_lock(&filter->fo_objidlock);
832 filter->fo_last_objids[group] = id;
833 spin_unlock(&filter->fo_objidlock);
836 __u64 filter_last_id(struct filter_obd *filter, struct obdo *oa)
840 LASSERT(filter->fo_fsd != NULL);
843 LASSERT(oa->o_gr <= FILTER_GROUPS);
847 /* FIXME: object groups */
848 spin_lock(&filter->fo_objidlock);
849 id = filter->fo_last_objids[group];
850 spin_unlock(&filter->fo_objidlock);
855 /* direct cut-n-paste of mds_blocking_ast() */
856 static int filter_blocking_ast(struct ldlm_lock *lock,
857 struct ldlm_lock_desc *desc,
858 void *data, int flag)
863 if (flag == LDLM_CB_CANCELING) {
864 /* Don't need to do anything here. */
868 /* XXX layering violation! -phil */
869 l_lock(&lock->l_resource->lr_namespace->ns_lock);
870 /* Get this: if filter_blocking_ast is racing with ldlm_intent_policy,
871 * such that filter_blocking_ast is called just before l_i_p takes the
872 * ns_lock, then by the time we get the lock, we might not be the
873 * correct blocking function anymore. So check, and return early, if
875 if (lock->l_blocking_ast != filter_blocking_ast) {
876 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
880 lock->l_flags |= LDLM_FL_CBPENDING;
881 do_ast = (!lock->l_readers && !lock->l_writers);
882 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
885 struct lustre_handle lockh;
888 LDLM_DEBUG(lock, "already unused, calling ldlm_cli_cancel");
889 ldlm_lock2handle(lock, &lockh);
890 rc = ldlm_cli_cancel(&lockh);
892 CERROR("ldlm_cli_cancel: %d\n", rc);
894 LDLM_DEBUG(lock, "Lock still has references, will be "
900 static int filter_lock_dentry(struct obd_device *obd, struct dentry *dparent)
902 down(&dparent->d_inode->i_sem);
906 /* We never dget the object parent, so DON'T dput it either */
907 static void filter_parent_unlock(struct dentry *dparent)
909 up(&dparent->d_inode->i_sem);
912 /* We never dget the object parent, so DON'T dput it either */
913 struct dentry *filter_parent(struct obd_device *obd, obd_gr group, obd_id objid)
915 struct filter_obd *filter = &obd->u.filter;
916 LASSERT(group < FILTER_GROUPS); /* FIXME: object groups */
918 if (group > 0 || filter->fo_subdir_count == 0)
919 return filter->fo_dentry_O_groups[group];
921 return filter->fo_dentry_O_sub[objid & (filter->fo_subdir_count - 1)];
924 /* We never dget the object parent, so DON'T dput it either */
925 struct dentry *filter_parent_lock(struct obd_device *obd, obd_gr group,
928 unsigned long now = jiffies;
929 struct dentry *dparent = filter_parent(obd, group, objid);
935 rc = filter_lock_dentry(obd, dparent);
936 if (time_after(jiffies, now + 15 * HZ))
937 CERROR("slow parent lock %lus\n", (jiffies - now) / HZ);
938 return rc ? ERR_PTR(rc) : dparent;
941 /* How to get files, dentries, inodes from object id's.
943 * If dir_dentry is passed, the caller has already locked the parent
944 * appropriately for this operation (normally a write lock). If
945 * dir_dentry is NULL, we do a read lock while we do the lookup to
946 * avoid races with create/destroy and such changing the directory
947 * internal to the filesystem code. */
948 struct dentry *filter_fid2dentry(struct obd_device *obd,
949 struct dentry *dir_dentry,
950 obd_gr group, obd_id id)
952 struct dentry *dparent = dir_dentry;
953 struct dentry *dchild;
959 CERROR("fatal: invalid object id 0\n");
960 RETURN(ERR_PTR(-ESTALE));
963 len = sprintf(name, LPU64, id);
964 if (dir_dentry == NULL) {
965 dparent = filter_parent_lock(obd, group, id);
969 CDEBUG(D_INODE, "looking up object O/%*s/%s\n",
970 dparent->d_name.len, dparent->d_name.name, name);
971 dchild = /*ll_*/lookup_one_len(name, dparent, len);
972 if (dir_dentry == NULL)
973 filter_parent_unlock(dparent);
974 if (IS_ERR(dchild)) {
975 CERROR("child lookup error %ld\n", PTR_ERR(dchild));
979 CDEBUG(D_INODE, "got child objid %s: %p, count = %d\n",
980 name, dchild, atomic_read(&dchild->d_count));
982 LASSERT(atomic_read(&dchild->d_count) > 0);
987 static int filter_prepare_destroy(struct obd_device *obd, obd_id objid)
989 struct lustre_handle lockh;
990 int flags = LDLM_AST_DISCARD_DATA, rc;
991 struct ldlm_res_id res_id = { .name = { objid } };
992 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
995 /* Tell the clients that the object is gone now and that they should
996 * throw away any cached pages. */
997 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, res_id,
998 LDLM_EXTENT, &policy, LCK_PW,
999 &flags, filter_blocking_ast, ldlm_completion_ast,
1000 NULL, NULL, NULL, 0, NULL, &lockh);
1002 /* We only care about the side-effects, just drop the lock. */
1004 ldlm_lock_decref(&lockh, LCK_PW);
1009 /* Caller must hold LCK_PW on parent and push us into kernel context.
1010 * Caller is also required to ensure that dchild->d_inode exists. */
1011 static int filter_destroy_internal(struct obd_device *obd, obd_id objid,
1012 struct dentry *dparent,
1013 struct dentry *dchild)
1015 struct inode *inode = dchild->d_inode;
1019 if (inode->i_nlink != 1 || atomic_read(&inode->i_count) != 1) {
1020 CERROR("destroying objid %*s nlink = %lu, count = %d\n",
1021 dchild->d_name.len, dchild->d_name.name,
1022 (unsigned long)inode->i_nlink,
1023 atomic_read(&inode->i_count));
1026 rc = vfs_unlink(dparent->d_inode, dchild);
1029 CERROR("error unlinking objid %*s: rc %d\n",
1030 dchild->d_name.len, dchild->d_name.name, rc);
1035 static int filter_intent_policy(struct ldlm_namespace *ns,
1036 struct ldlm_lock **lockp, void *req_cookie,
1037 ldlm_mode_t mode, int flags, void *data)
1039 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1040 struct ptlrpc_request *req = req_cookie;
1041 struct ldlm_lock *lock = *lockp, *l = NULL;
1042 struct ldlm_resource *res = lock->l_resource;
1043 ldlm_processing_policy policy;
1044 struct ost_lvb *res_lvb, *reply_lvb;
1045 struct list_head *tmp;
1047 int tmpflags = 0, rc, repsize[2] = {sizeof(struct ldlm_reply),
1048 sizeof(struct ost_lvb) };
1051 policy = ldlm_get_processing_policy(res);
1052 LASSERT(policy != NULL);
1053 LASSERT(req != NULL);
1055 rc = lustre_pack_reply(req, 2, repsize, NULL);
1057 RETURN(req->rq_status = rc);
1059 reply_lvb = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*reply_lvb));
1060 LASSERT(reply_lvb != NULL);
1062 //fixup_handle_for_resent_req(req, lock, &lockh);
1064 /* If we grant any lock at all, it will be a whole-file read lock.
1065 * Call the extent policy function to see if our request can be
1066 * granted, or is blocked. */
1067 lock->l_policy_data.l_extent.start = 0;
1068 lock->l_policy_data.l_extent.end = OBD_OBJECT_EOF;
1069 lock->l_req_mode = LCK_PR;
1071 l_lock(&res->lr_namespace->ns_lock);
1073 res->lr_tmp = &rpc_list;
1074 rc = policy(lock, &tmpflags, 0, &err);
1077 /* FIXME: we should change the policy function slightly, to not make
1078 * this list at all, since we just turn around and free it */
1079 while (!list_empty(&rpc_list)) {
1080 struct ldlm_ast_work *w =
1081 list_entry(rpc_list.next, struct ldlm_ast_work, w_list);
1082 list_del(&w->w_list);
1083 LDLM_LOCK_PUT(w->w_lock);
1084 OBD_FREE(w, sizeof(*w));
1087 if (rc == LDLM_ITER_CONTINUE) {
1088 /* The lock met with no resistance; we're finished. */
1089 l_unlock(&res->lr_namespace->ns_lock);
1090 RETURN(ELDLM_LOCK_REPLACED);
1093 /* Do not grant any lock, but instead send GL callbacks. The extent
1094 * policy nicely created a list of all PW locks for us. We will choose
1095 * the highest of those which are larger than the size in the LVB, if
1096 * any, and perform a glimpse callback. */
1097 down(&res->lr_lvb_sem);
1098 res_lvb = res->lr_lvb_data;
1099 LASSERT(res_lvb != NULL);
1100 reply_lvb->lvb_size = res_lvb->lvb_size;
1101 reply_lvb->lvb_blocks = res_lvb->lvb_blocks;
1102 up(&res->lr_lvb_sem);
1104 list_for_each(tmp, &res->lr_granted) {
1105 struct ldlm_lock *tmplock =
1106 list_entry(tmp, struct ldlm_lock, l_res_link);
1108 if (tmplock->l_granted_mode == LCK_PR)
1111 if (tmplock->l_policy_data.l_extent.end <= reply_lvb->lvb_size)
1115 l = LDLM_LOCK_GET(tmplock);
1119 if (l->l_policy_data.l_extent.start >
1120 tmplock->l_policy_data.l_extent.start)
1124 l = LDLM_LOCK_GET(tmplock);
1126 l_unlock(&res->lr_namespace->ns_lock);
1128 /* There were no PW locks beyond the size in the LVB; finished. */
1130 RETURN(ELDLM_LOCK_ABORTED);
1132 LASSERT(l->l_glimpse_ast != NULL);
1133 rc = l->l_glimpse_ast(l, NULL); /* this will update the LVB */
1134 if (rc != 0 && res->lr_namespace->ns_lvbo &&
1135 res->lr_namespace->ns_lvbo->lvbo_update) {
1136 res->lr_namespace->ns_lvbo->lvbo_update(res, NULL, 0, 1);
1139 down(&res->lr_lvb_sem);
1140 reply_lvb->lvb_size = res_lvb->lvb_size;
1141 reply_lvb->lvb_blocks = res_lvb->lvb_blocks;
1142 up(&res->lr_lvb_sem);
1146 RETURN(ELDLM_LOCK_ABORTED);
1149 /* mount the file system (secretly) */
1150 int filter_common_setup(struct obd_device *obd, obd_count len, void *buf,
1153 struct lustre_cfg* lcfg = buf;
1154 struct filter_obd *filter = &obd->u.filter;
1155 struct vfsmount *mnt;
1159 dev_clear_rdonly(2);
1161 if (!lcfg->lcfg_inlbuf1 || !lcfg->lcfg_inlbuf2)
1164 obd->obd_fsops = fsfilt_get_ops(lcfg->lcfg_inlbuf2);
1165 if (IS_ERR(obd->obd_fsops))
1166 RETURN(PTR_ERR(obd->obd_fsops));
1168 mnt = do_kern_mount(lcfg->lcfg_inlbuf2, MS_NOATIME | MS_NODIRATIME,
1169 lcfg->lcfg_inlbuf1, option);
1174 if (lcfg->lcfg_inllen3 > 0 && lcfg->lcfg_inlbuf3) {
1175 if (*lcfg->lcfg_inlbuf3 == 'f') {
1176 obd->obd_replayable = 1;
1177 obd_sync_filter = 1;
1178 CWARN("%s: recovery enabled\n", obd->obd_name);
1180 if (*lcfg->lcfg_inlbuf3 != 'n') {
1181 CERROR("unrecognised flag '%c'\n",
1182 *lcfg->lcfg_inlbuf3);
1184 // XXX Robert? Why do we get errors here
1185 // GOTO(err_mntput, rc = -EINVAL);
1189 filter->fo_vfsmnt = mnt;
1190 filter->fo_sb = mnt->mnt_sb;
1191 filter->fo_fstype = mnt->mnt_sb->s_type->name;
1192 CDEBUG(D_SUPER, "%s: mnt = %p\n", filter->fo_fstype, mnt);
1194 OBD_SET_CTXT_MAGIC(&obd->obd_ctxt);
1195 obd->obd_ctxt.pwdmnt = mnt;
1196 obd->obd_ctxt.pwd = mnt->mnt_root;
1197 obd->obd_ctxt.fs = get_ds();
1198 obd->obd_ctxt.cb_ops = filter_lvfs_ops;
1200 rc = filter_prep(obd);
1202 GOTO(err_mntput, rc);
1204 spin_lock_init(&filter->fo_translock);
1205 spin_lock_init(&filter->fo_objidlock);
1206 INIT_LIST_HEAD(&filter->fo_export_list);
1207 sema_init(&filter->fo_alloc_lock, 1);
1208 spin_lock_init(&filter->fo_r_pages.oh_lock);
1209 spin_lock_init(&filter->fo_w_pages.oh_lock);
1210 spin_lock_init(&filter->fo_r_discont_pages.oh_lock);
1211 spin_lock_init(&filter->fo_w_discont_pages.oh_lock);
1212 spin_lock_init(&filter->fo_r_discont_blocks.oh_lock);
1213 spin_lock_init(&filter->fo_w_discont_blocks.oh_lock);
1214 filter->fo_readcache_max_filesize = FILTER_MAX_CACHE_SIZE;
1216 obd->obd_namespace = ldlm_namespace_new("filter-tgt",
1217 LDLM_NAMESPACE_SERVER);
1218 if (obd->obd_namespace == NULL)
1219 GOTO(err_post, rc = -ENOMEM);
1220 obd->obd_namespace->ns_lvbp = obd;
1221 obd->obd_namespace->ns_lvbo = &filter_lvbo;
1222 ldlm_register_intent(obd->obd_namespace, filter_intent_policy);
1224 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1225 "filter_ldlm_cb_client", &obd->obd_ldlm_client);
1227 rc = llog_cat_initialize(obd, 1);
1229 CERROR("failed to setup llogging subsystems\n");
1243 fsfilt_put_ops(obd->obd_fsops);
1247 static int filter_setup(struct obd_device *obd, obd_count len, void *buf)
1249 struct lustre_cfg* lcfg = buf;
1250 const char *str = NULL;
1251 char *option = NULL;
1255 if (!lcfg->lcfg_inlbuf1 || !lcfg->lcfg_inlbuf2)
1258 if (!strcmp(lcfg->lcfg_inlbuf2, "ext3")) {
1259 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1260 /* bug 1577: implement async-delete for 2.5 */
1261 str = "errors=remount-ro,asyncdel";
1263 str = "errors=remount-ro";
1265 n = strlen(str) + 1;
1266 OBD_ALLOC(option, n);
1269 strcpy(option, str);
1272 rc = filter_common_setup(obd, len, buf, option);
1274 OBD_FREE(option, n);
1278 static int filter_cleanup(struct obd_device *obd, int flags)
1280 struct filter_obd *filter = &obd->u.filter;
1283 if (flags & OBD_OPT_FAILOVER)
1284 CERROR("%s: shutting down for failover; client state will"
1285 " be preserved.\n", obd->obd_name);
1287 if (!list_empty(&obd->obd_exports)) {
1288 CERROR("%s: still has clients!\n", obd->obd_name);
1289 class_disconnect_exports(obd, flags);
1290 if (!list_empty(&obd->obd_exports)) {
1291 CERROR("still has exports after forced cleanup?\n");
1296 ldlm_namespace_free(obd->obd_namespace, flags & OBD_OPT_FORCE);
1298 if (filter->fo_sb == NULL)
1303 shrink_dcache_parent(filter->fo_sb->s_root);
1306 if (atomic_read(&filter->fo_vfsmnt->mnt_count) > 1)
1307 CERROR("%s: mount point %p busy, mnt_count: %d\n",
1308 obd->obd_name, filter->fo_vfsmnt,
1309 atomic_read(&filter->fo_vfsmnt->mnt_count));
1312 mntput(filter->fo_vfsmnt);
1313 //destroy_buffers(filter->fo_sb->s_dev);
1314 filter->fo_sb = NULL;
1315 fsfilt_put_ops(obd->obd_fsops);
1318 dev_clear_rdonly(2);
1323 static int filter_attach(struct obd_device *obd, obd_count len, void *data)
1325 struct lprocfs_static_vars lvars;
1328 lprocfs_init_vars(filter, &lvars);
1329 rc = lprocfs_obd_attach(obd, lvars.obd_vars);
1333 rc = lprocfs_alloc_obd_stats(obd, LPROC_FILTER_LAST);
1337 /* Init obdfilter private stats here */
1338 lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_READ_BYTES,
1339 LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes");
1340 lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_WRITE_BYTES,
1341 LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes");
1343 return lproc_filter_attach_seqstat(obd);
1346 static int filter_detach(struct obd_device *dev)
1348 lprocfs_free_obd_stats(dev);
1349 return lprocfs_obd_detach(dev);
1352 /* nearly identical to mds_connect */
1353 static int filter_connect(struct lustre_handle *conn, struct obd_device *obd,
1354 struct obd_uuid *cluuid)
1356 struct obd_export *exp;
1357 struct filter_export_data *fed;
1358 struct filter_client_data *fcd = NULL;
1359 struct filter_obd *filter = &obd->u.filter;
1363 if (conn == NULL || obd == NULL || cluuid == NULL)
1366 rc = class_connect(conn, obd, cluuid);
1369 exp = class_conn2export(conn);
1370 LASSERT(exp != NULL);
1372 fed = &exp->exp_filter_data;
1374 spin_lock_init(&fed->fed_lock);
1376 if (!obd->obd_replayable)
1377 GOTO(cleanup, rc = 0);
1379 OBD_ALLOC(fcd, sizeof(*fcd));
1381 CERROR("filter: out of memory for client data\n");
1382 GOTO(cleanup, rc = -ENOMEM);
1385 memcpy(fcd->fcd_uuid, cluuid, sizeof(fcd->fcd_uuid));
1388 rc = filter_client_add(obd, filter, fed, -1);
1393 OBD_FREE(fcd, sizeof(*fcd));
1394 class_disconnect(exp, 0);
1396 class_export_put(exp);
1401 static int filter_precleanup(struct obd_device *obd, int flags)
1406 rc = obd_llog_finish(obd, 0);
1408 CERROR("failed to cleanup llogging subsystem\n");
1413 /* Do extra sanity checks for grant accounting. We do this at connect,
1414 * disconnect, and statfs RPC time, so it shouldn't be too bad. We can
1415 * always get rid of it or turn it off when we know accounting is good. */
1416 static void filter_grant_sanity_check(struct obd_device *obd, char *func)
1418 struct filter_export_data *fed;
1419 struct obd_export *exp;
1420 obd_size maxsize = obd->obd_osfs.os_blocks * obd->obd_osfs.os_bsize;
1421 obd_size tot_dirty = 0, tot_pending = 0, tot_granted = 0;
1422 obd_size fo_tot_dirty, fo_tot_pending, fo_tot_granted;
1424 if (list_empty(&obd->obd_exports))
1427 spin_lock(&obd->obd_osfs_lock);
1428 spin_lock(&obd->obd_dev_lock);
1429 list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
1430 fed = &exp->exp_filter_data;
1431 LASSERTF(fed->fed_grant + fed->fed_pending <= maxsize,
1432 "cli %s/%p %lu+%lu > "LPU64"\n",
1433 exp->exp_client_uuid.uuid, exp,
1434 fed->fed_grant, fed->fed_pending, maxsize);
1435 LASSERTF(fed->fed_dirty <= maxsize, "cli %s/%p %lu > "LPU64"\n",
1436 exp->exp_client_uuid.uuid, exp,fed->fed_dirty,maxsize);
1437 CDEBUG(D_CACHE,"%s: cli %s/%p dirty %lu pend %lu grant %lu\n",
1438 obd->obd_name, exp->exp_client_uuid.uuid, exp,
1439 fed->fed_dirty, fed->fed_pending, fed->fed_grant);
1440 tot_granted += fed->fed_grant + fed->fed_pending;
1441 tot_pending += fed->fed_pending;
1442 tot_dirty += fed->fed_dirty;
1444 fo_tot_granted = obd->u.filter.fo_tot_granted;
1445 fo_tot_pending = obd->u.filter.fo_tot_pending;
1446 fo_tot_dirty = obd->u.filter.fo_tot_dirty;
1447 spin_unlock(&obd->obd_dev_lock);
1448 spin_unlock(&obd->obd_osfs_lock);
1450 /* Do these assertions outside the spinlocks so we don't kill system */
1451 if (tot_granted != fo_tot_granted)
1452 CERROR("%s: tot_granted "LPU64" != fo_tot_granted "LPU64"\n",
1453 func, tot_granted, fo_tot_granted);
1454 if (tot_pending != fo_tot_pending)
1455 CERROR("%s: tot_pending "LPU64" != fo_tot_pending "LPU64"\n",
1456 func, tot_pending, fo_tot_pending);
1457 if (tot_dirty != fo_tot_dirty)
1458 CERROR("%s: tot_dirty "LPU64" != fo_tot_dirty "LPU64"\n",
1459 func, tot_dirty, fo_tot_dirty);
1460 if (tot_pending > tot_granted)
1461 CERROR("%s: tot_pending "LPU64" > tot_granted "LPU64"\n",
1462 func, tot_pending, tot_granted);
1463 if (tot_granted > maxsize)
1464 CERROR("%s: tot_granted "LPU64" > maxsize "LPU64"\n",
1465 func, tot_granted, maxsize);
1466 if (tot_dirty > maxsize)
1467 CERROR("%s: tot_dirty "LPU64" > maxsize "LPU64"\n",
1468 func, tot_dirty, maxsize);
1471 /* Remove this client from the grant accounting totals. We also remove
1472 * the export from the obd device under the osfs and dev locks to ensure
1473 * that the filter_grant_sanity_check() calculations are always valid.
1474 * The client should do something similar when it invalidates its import. */
1475 static void filter_grant_discard(struct obd_export *exp)
1477 struct obd_device *obd = exp->exp_obd;
1478 struct filter_obd *filter = &obd->u.filter;
1479 struct filter_export_data *fed = &exp->exp_filter_data;
1481 spin_lock(&obd->obd_osfs_lock);
1482 spin_lock(&exp->exp_obd->obd_dev_lock);
1483 list_del_init(&exp->exp_obd_chain);
1484 spin_unlock(&exp->exp_obd->obd_dev_lock);
1486 CDEBUG(D_CACHE, "%s: cli %s/%p dirty %lu pend %lu grant %lu\n",
1487 obd->obd_name, exp->exp_client_uuid.uuid, exp,
1488 fed->fed_dirty, fed->fed_pending, fed->fed_grant);
1490 LASSERTF(filter->fo_tot_granted >= fed->fed_grant,
1491 "%s: tot_granted "LPU64" cli %s/%p fed_grant %lu\n",
1492 obd->obd_name, filter->fo_tot_granted,
1493 exp->exp_client_uuid.uuid, exp, fed->fed_grant);
1494 filter->fo_tot_granted -= fed->fed_grant;
1495 LASSERTF(exp->exp_obd->u.filter.fo_tot_pending >= fed->fed_pending,
1496 "%s: tot_pending "LPU64" cli %s/%p fed_pending %lu\n",
1497 obd->obd_name, filter->fo_tot_pending,
1498 exp->exp_client_uuid.uuid, exp, fed->fed_pending);
1499 LASSERTF(filter->fo_tot_dirty >= fed->fed_dirty,
1500 "%s: tot_dirty "LPU64" cli %s/%p fed_dirty %lu\n",
1501 obd->obd_name, filter->fo_tot_dirty,
1502 exp->exp_client_uuid.uuid, exp, fed->fed_dirty);
1503 filter->fo_tot_dirty -= fed->fed_dirty;
1507 spin_unlock(&obd->obd_osfs_lock);
1510 static int filter_destroy_export(struct obd_export *exp)
1514 if (exp->exp_filter_data.fed_pending)
1515 CERROR("%s: cli %s/%p has %lu pending on destroyed export\n",
1516 exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
1517 exp, exp->exp_filter_data.fed_pending);
1519 target_destroy_export(exp);
1521 if (exp->exp_obd->obd_replayable)
1522 filter_client_free(exp, exp->exp_flags);
1524 filter_grant_discard(exp);
1525 if (!(exp->exp_flags & OBD_OPT_FORCE))
1526 filter_grant_sanity_check(exp->exp_obd, __FUNCTION__);
1531 /* also incredibly similar to mds_disconnect */
1532 static int filter_disconnect(struct obd_export *exp, int flags)
1534 struct obd_device *obd = exp->exp_obd;
1535 unsigned long irqflags;
1536 struct llog_ctxt *ctxt;
1541 class_export_get(exp);
1543 spin_lock_irqsave(&exp->exp_lock, irqflags);
1544 exp->exp_flags = flags;
1545 spin_unlock_irqrestore(&exp->exp_lock, irqflags);
1547 if (!(flags & OBD_OPT_FORCE))
1548 filter_grant_sanity_check(obd, __FUNCTION__);
1549 filter_grant_discard(exp);
1551 /* Disconnect early so that clients can't keep using export */
1552 rc = class_disconnect(exp, flags);
1554 ldlm_cancel_locks_for_export(exp);
1556 fsfilt_sync(obd, obd->u.filter.fo_sb);
1558 /* flush any remaining cancel messages out to the target */
1559 ctxt = llog_get_context(obd, LLOG_UNLINK_REPL_CTXT);
1560 llog_sync(ctxt, exp);
1562 class_export_put(exp);
1566 struct dentry *__filter_oa2dentry(struct obd_device *obd,
1567 struct obdo *oa, const char *what)
1569 struct dentry *dchild = NULL;
1572 if (oa->o_valid & OBD_MD_FLGROUP)
1575 dchild = filter_fid2dentry(obd, NULL, group, oa->o_id);
1577 if (IS_ERR(dchild)) {
1578 CERROR("%s error looking up object: "LPU64"\n", what, oa->o_id);
1582 if (dchild->d_inode == NULL) {
1583 CERROR("%s on non-existent object: "LPU64"\n", what, oa->o_id);
1585 RETURN(ERR_PTR(-ENOENT));
1591 static int filter_getattr(struct obd_export *exp, struct obdo *oa,
1592 struct lov_stripe_md *md)
1594 struct dentry *dentry = NULL;
1595 struct obd_device *obd;
1599 obd = class_exp2obd(exp);
1601 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1602 exp->exp_handle.h_cookie);
1606 dentry = filter_oa2dentry(obd, oa);
1608 RETURN(PTR_ERR(dentry));
1610 /* Limit the valid bits in the return data to what we actually use */
1611 oa->o_valid = OBD_MD_FLID;
1612 obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
1618 /* this is called from filter_truncate() until we have filter_punch() */
1619 static int filter_setattr(struct obd_export *exp, struct obdo *oa,
1620 struct lov_stripe_md *md, struct obd_trans_info *oti)
1622 struct obd_run_ctxt saved;
1623 struct filter_obd *filter;
1624 struct dentry *dentry;
1626 struct ldlm_res_id res_id = { .name = { oa->o_id } };
1627 struct ldlm_resource *res;
1632 LASSERT(oti != NULL);
1634 dentry = filter_oa2dentry(exp->exp_obd, oa);
1636 RETURN(PTR_ERR(dentry));
1638 filter = &exp->exp_obd->u.filter;
1640 iattr_from_obdo(&iattr, oa, oa->o_valid);
1642 push_ctxt(&saved, &exp->exp_obd->obd_ctxt, NULL);
1645 if (iattr.ia_valid & ATTR_SIZE)
1646 down(&dentry->d_inode->i_sem);
1647 handle = fsfilt_start(exp->exp_obd, dentry->d_inode, FSFILT_OP_SETATTR,
1650 GOTO(out_unlock, rc = PTR_ERR(handle));
1652 /* XXX this could be a rwsem instead, if filter_preprw played along */
1653 if (iattr.ia_valid & ATTR_ATTR_FLAG)
1654 rc = fsfilt_iocontrol(exp->exp_obd, dentry->d_inode, NULL,
1656 (long)&iattr.ia_attr_flags);
1658 rc = fsfilt_setattr(exp->exp_obd, dentry, handle, &iattr, 1);
1659 rc = filter_finish_transno(exp, oti, rc);
1660 rc2 = fsfilt_commit(exp->exp_obd, dentry->d_inode, handle, 0);
1662 CERROR("error on commit, err = %d\n", rc2);
1667 if (iattr.ia_valid & ATTR_SIZE) {
1668 res = ldlm_resource_get(exp->exp_obd->obd_namespace, NULL,
1669 res_id, LDLM_EXTENT, 0);
1671 CERROR("!!! resource_get failed for object "LPU64" -- "
1672 "filter_setattr with no lock?\n", oa->o_id);
1674 if (res->lr_namespace->ns_lvbo &&
1675 res->lr_namespace->ns_lvbo->lvbo_update) {
1676 rc = res->lr_namespace->ns_lvbo->lvbo_update
1679 ldlm_resource_putref(res);
1683 oa->o_valid = OBD_MD_FLID;
1684 obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
1687 if (iattr.ia_valid & ATTR_SIZE)
1688 up(&dentry->d_inode->i_sem);
1690 pop_ctxt(&saved, &exp->exp_obd->obd_ctxt, NULL);
1696 /* XXX identical to osc_unpackmd */
1697 static int filter_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
1698 struct lov_mds_md *lmm, int lmm_bytes)
1704 if (lmm_bytes < sizeof (*lmm)) {
1705 CERROR("lov_mds_md too small: %d, need %d\n",
1706 lmm_bytes, (int)sizeof(*lmm));
1709 /* XXX LOV_MAGIC etc check? */
1711 if (lmm->lmm_object_id == cpu_to_le64(0)) {
1712 CERROR("lov_mds_md: zero lmm_object_id\n");
1717 lsm_size = lov_stripe_md_size(1);
1721 if (*lsmp != NULL && lmm == NULL) {
1722 OBD_FREE(*lsmp, lsm_size);
1727 if (*lsmp == NULL) {
1728 OBD_ALLOC(*lsmp, lsm_size);
1732 loi_init((*lsmp)->lsm_oinfo);
1736 /* XXX zero *lsmp? */
1737 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
1738 LASSERT((*lsmp)->lsm_object_id);
1741 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
1746 static void filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
1747 struct filter_obd *filter)
1749 struct obdo doa; /* XXX obdo on stack */
1754 memset(&doa, 0, sizeof(doa));
1755 if (oa->o_valid & OBD_MD_FLGROUP)
1756 doa.o_gr = oa->o_gr;
1759 doa.o_mode = S_IFREG;
1760 last = filter_last_id(filter, &doa); /* FIXME: object groups */
1761 CWARN("deleting orphan objects from "LPU64" to "LPU64"\n",
1762 oa->o_id + 1, last);
1763 for (id = oa->o_id + 1; id <= last; id++) {
1765 filter_destroy(exp, &doa, NULL, NULL);
1767 spin_lock(&filter->fo_objidlock);
1768 filter->fo_last_objids[0] = oa->o_id; /* FIXME: object groups */
1769 spin_unlock(&filter->fo_objidlock);
1773 /* returns a negative error or a nonnegative number of files to create */
1774 static int filter_should_precreate(struct obd_export *exp, struct obdo *oa,
1777 struct obd_device *obd = exp->exp_obd;
1778 struct filter_obd *filter = &obd->u.filter;
1782 diff = oa->o_id - filter_last_id(filter, oa);
1783 CDEBUG(D_INFO, "filter_last_id() = "LPU64" -> diff = %d\n",
1784 filter_last_id(filter, oa), diff);
1786 /* delete orphans request */
1787 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
1788 (oa->o_flags & OBD_FL_DELORPHAN)) {
1791 if (-diff > 10000) { /* XXX make this smarter */
1792 CERROR("ignoring bogus orphan destroy request: obdid "
1793 LPU64" last_id "LPU64"\n",
1794 oa->o_id, filter_last_id(filter, oa));
1797 filter_destroy_precreated(exp, oa, filter);
1798 rc = filter_update_last_objid(obd, group, 0);
1800 CERROR("unable to write lastobjid, but orphans"
1804 /* only precreate if group == 0 and o_id is specfied */
1805 if (!(oa->o_valid & OBD_FL_DELORPHAN) &&
1806 (group != 0 || oa->o_id == 0))
1814 /* We rely on the fact that only one thread will be creating files in a given
1815 * group at a time, which is why we don't need an atomic filter_get_new_id.
1816 * Even if we had that atomic function, the following race would exist:
1818 * thread 1: gets id x from filter_next_id
1819 * thread 2: gets id (x + 1) from filter_next_id
1820 * thread 2: creates object (x + 1)
1821 * thread 1: tries to create object x, gets -ENOSPC
1823 static int filter_precreate(struct obd_device *obd, struct obdo *oa,
1824 obd_gr group, int *num)
1826 struct dentry *dchild = NULL;
1827 struct filter_obd *filter;
1828 struct dentry *dparent;
1829 int err = 0, rc = 0, i;
1831 int recreate_obj = 0;
1832 void *handle = NULL;
1835 filter = &obd->u.filter;
1837 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
1838 (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1842 for (i = 0; i < *num && err == 0; i++) {
1843 int cleanup_phase = 0;
1848 last_id = filter_last_id(filter, NULL);
1849 if (next_id > last_id) {
1850 CERROR("Error: Trying to recreate obj greater"
1851 "than last id "LPD64" > "LPD64"\n",
1856 next_id = filter_last_id(filter, NULL) + 1;
1858 CDEBUG(D_INFO, "precreate objid "LPU64"\n", next_id);
1860 dparent = filter_parent_lock(obd, group, next_id);
1861 if (IS_ERR(dparent))
1862 GOTO(cleanup, rc = PTR_ERR(dparent));
1865 dchild = filter_fid2dentry(obd, dparent, group, next_id);
1867 GOTO(cleanup, rc = PTR_ERR(dchild));
1870 if (dchild->d_inode != NULL) {
1871 /* This would only happen if lastobjid was bad on disk*/
1872 /* Could also happen if recreating missing obj but
1876 CERROR("Serious error: recreating obj %*s but "
1877 "obj already exists \n",
1878 dchild->d_name.len, dchild->d_name.name);
1880 CERROR("Serious error: objid %*s already "
1881 "exists; is this filesystem corrupt?\n",
1882 dchild->d_name.len, dchild->d_name.name);
1884 GOTO(cleanup, rc = -EEXIST);
1887 handle = fsfilt_start_log(obd, dparent->d_inode,
1888 FSFILT_OP_CREATE, NULL, 1);
1890 GOTO(cleanup, rc = PTR_ERR(handle));
1893 rc = ll_vfs_create(dparent->d_inode, dchild, S_IFREG, NULL);
1895 CERROR("create failed rc = %d\n", rc);
1899 if (!recreate_obj) {
1900 filter_set_last_id(filter, NULL, next_id);
1901 err = filter_update_last_objid(obd, group, 0);
1903 CERROR("unable to write lastobjid "
1904 "but file created\n");
1908 switch(cleanup_phase) {
1910 err = fsfilt_commit(obd, dparent->d_inode, handle, 0);
1912 CERROR("error on commit, err = %d\n", err);
1919 filter_parent_unlock(dparent);
1929 CDEBUG(D_INFO, "filter_precreate() created %d objects\n", i);
1933 static int filter_create(struct obd_export *exp, struct obdo *oa,
1934 struct lov_stripe_md **ea, struct obd_trans_info *oti)
1936 struct obd_device *obd = NULL;
1937 struct obd_run_ctxt saved;
1938 struct lov_stripe_md *lsm = NULL;
1943 if (oa->o_valid & OBD_MD_FLGROUP)
1946 CDEBUG(D_INFO, "filter_create(od->o_gr="LPU64",od->o_id="LPU64")\n",
1951 rc = obd_alloc_memmd(exp, &lsm);
1958 push_ctxt(&saved, &obd->obd_ctxt, NULL);
1960 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
1961 (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1962 if (oa->o_id > filter_last_id(&obd->u.filter, oa)) {
1963 CERROR("recreate objid "LPU64" > last id "LPU64"\n",
1964 oa->o_id, filter_last_id(&obd->u.filter, oa));
1968 rc = filter_precreate(obd, oa, group, &diff);
1971 diff = filter_should_precreate(exp, oa, group);
1973 oa->o_id = filter_last_id(&obd->u.filter, oa);
1974 rc = filter_precreate(obd, oa, group, &diff);
1976 oa->o_valid = OBD_MD_FLID;
1980 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
1981 if (rc && ea != NULL && *ea != lsm) {
1982 obd_free_memmd(exp, &lsm);
1983 } else if (rc == 0 && ea != NULL) {
1984 /* XXX LOV STACKING: the lsm that is passed to us from
1985 * LOV does not have valid lsm_oinfo data structs, so
1986 * don't go touching that. This needs to be fixed in a
1988 lsm->lsm_object_id = oa->o_id;
1995 static int filter_destroy(struct obd_export *exp, struct obdo *oa,
1996 struct lov_stripe_md *ea, struct obd_trans_info *oti)
1998 struct obd_device *obd;
1999 struct filter_obd *filter;
2000 struct dentry *dchild = NULL, *dparent = NULL;
2001 struct obd_run_ctxt saved;
2002 void *handle = NULL;
2003 struct llog_cookie *fcc = NULL;
2004 int rc, rc2, cleanup_phase = 0, have_prepared = 0;
2008 if (oa->o_valid & OBD_MD_FLGROUP)
2012 filter = &obd->u.filter;
2014 push_ctxt(&saved, &obd->obd_ctxt, NULL);
2017 dparent = filter_parent_lock(obd, group, oa->o_id);
2018 if (IS_ERR(dparent))
2019 GOTO(cleanup, rc = PTR_ERR(dparent));
2022 dchild = filter_fid2dentry(obd, dparent, group, oa->o_id);
2024 GOTO(cleanup, rc = -ENOENT);
2027 if (dchild->d_inode == NULL) {
2028 CDEBUG(D_INODE, "destroying non-existent object "LPU64"\n",
2030 GOTO(cleanup, rc = -ENOENT);
2033 if (!have_prepared) {
2034 /* If we're really going to destroy the object, get ready
2035 * by getting the clients to discard their cached data.
2037 * We have to drop the parent lock, because
2038 * filter_prepare_destroy will acquire a PW on the object, and
2039 * we don't want to deadlock with an incoming write to the
2040 * object, which has the extent PW and then wants to get the
2041 * parent dentry to do the lookup.
2043 * We dput the child because it's not worth the extra
2044 * complication of condition the above code to skip it on the
2045 * second time through. */
2047 filter_parent_unlock(dparent);
2049 filter_prepare_destroy(obd, oa->o_id);
2054 handle = fsfilt_start_log(obd, dparent->d_inode,FSFILT_OP_UNLINK,oti,1);
2056 GOTO(cleanup, rc = PTR_ERR(handle));
2059 /* Our MDC connection is established by the MDS to us */
2060 if (oa->o_valid & OBD_MD_FLCOOKIE) {
2061 OBD_ALLOC(fcc, sizeof(*fcc));
2063 memcpy(fcc, obdo_logcookie(oa), sizeof(*fcc));
2066 rc = filter_destroy_internal(obd, oa->o_id, dparent, dchild);
2069 switch(cleanup_phase) {
2073 fsfilt_add_journal_cb(obd, 0, oti->oti_handle,
2074 filter_cancel_cookies_cb,
2077 fsfilt_add_journal_cb(obd, 0, handle,
2078 filter_cancel_cookies_cb,
2081 rc = filter_finish_transno(exp, oti, rc);
2082 rc2 = fsfilt_commit(obd, dparent->d_inode, handle, 0);
2084 CERROR("error on commit, err = %d\n", rc2);
2091 filter_parent_unlock(dparent);
2093 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
2096 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2103 /* NB start and end are used for punch, but not truncate */
2104 static int filter_truncate(struct obd_export *exp, struct obdo *oa,
2105 struct lov_stripe_md *lsm,
2106 obd_off start, obd_off end,
2107 struct obd_trans_info *oti)
2112 if (end != OBD_OBJECT_EOF)
2113 CERROR("PUNCH not supported, only truncate: end = "LPX64"\n",
2116 CDEBUG(D_INODE, "calling truncate for object "LPU64", valid = %x, "
2117 "o_size = "LPD64"\n", oa->o_id, oa->o_valid, start);
2119 error = filter_setattr(exp, oa, NULL, oti);
2123 static int filter_sync(struct obd_export *exp, struct obdo *oa,
2124 struct lov_stripe_md *lsm, obd_off start, obd_off end)
2126 struct obd_run_ctxt saved;
2127 struct filter_obd *filter;
2128 struct dentry *dentry;
2129 struct llog_ctxt *ctxt;
2133 filter = &exp->exp_obd->u.filter;
2135 /* an objid of zero is taken to mean "sync whole filesystem" */
2136 if (!oa || !(oa->o_valid & OBD_MD_FLID)) {
2137 rc = fsfilt_sync(exp->exp_obd, filter->fo_sb);
2138 /* flush any remaining cancel messages out to the target */
2139 ctxt = llog_get_context(exp->exp_obd, LLOG_UNLINK_REPL_CTXT);
2140 llog_sync(ctxt, exp);
2144 dentry = filter_oa2dentry(exp->exp_obd, oa);
2146 RETURN(PTR_ERR(dentry));
2148 push_ctxt(&saved, &exp->exp_obd->obd_ctxt, NULL);
2150 down(&dentry->d_inode->i_sem);
2151 rc = filemap_fdatasync(dentry->d_inode->i_mapping);
2153 /* just any file to grab fsync method - "file" arg unused */
2154 struct file *file = filter->fo_rcvd_filp;
2156 if (file->f_op && file->f_op->fsync)
2157 rc = file->f_op->fsync(NULL, dentry, 1);
2159 rc2 = filemap_fdatawait(dentry->d_inode->i_mapping);
2163 up(&dentry->d_inode->i_sem);
2165 oa->o_valid = OBD_MD_FLID;
2166 obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
2168 pop_ctxt(&saved, &exp->exp_obd->obd_ctxt, NULL);
2174 static int filter_statfs(struct obd_device *obd, struct obd_statfs *osfs,
2175 unsigned long max_age)
2177 struct filter_obd *filter = &obd->u.filter;
2178 int blockbits = filter->fo_sb->s_blocksize_bits;
2182 /* at least try to account for cached pages. its still racey and
2183 * might be under-reporting if clients haven't announced their
2184 * caches with brw recently */
2185 spin_lock(&obd->obd_osfs_lock);
2186 rc = fsfilt_statfs(obd, filter->fo_sb, max_age);
2187 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
2188 spin_unlock(&obd->obd_osfs_lock);
2190 CDEBUG(D_SUPER | D_CACHE, "blocks cached "LPU64" granted "LPU64
2191 " pending "LPU64" free "LPU64" avail "LPU64"\n",
2192 filter->fo_tot_dirty, filter->fo_tot_granted,
2193 filter->fo_tot_pending,
2194 osfs->os_bfree << blockbits, osfs->os_bavail << blockbits);
2196 filter_grant_sanity_check(obd, __FUNCTION__);
2198 osfs->os_bavail -= min(osfs->os_bavail,
2199 (filter->fo_tot_dirty + filter->fo_tot_pending +
2200 osfs->os_bsize -1) >> blockbits);
2205 static int filter_get_info(struct obd_export *exp, __u32 keylen,
2206 void *key, __u32 *vallen, void *val)
2208 struct obd_device *obd;
2211 obd = class_exp2obd(exp);
2213 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
2214 exp->exp_handle.h_cookie);
2218 if (keylen == strlen("blocksize") &&
2219 memcmp(key, "blocksize", keylen) == 0) {
2220 __u32 *blocksize = val;
2221 *vallen = sizeof(*blocksize);
2222 *blocksize = obd->u.filter.fo_sb->s_blocksize;
2226 if (keylen == strlen("blocksize_bits") &&
2227 memcmp(key, "blocksize_bits", keylen) == 0) {
2228 __u32 *blocksize_bits = val;
2229 *vallen = sizeof(*blocksize_bits);
2230 *blocksize_bits = obd->u.filter.fo_sb->s_blocksize_bits;
2234 if (keylen >= strlen("last_id") && memcmp(key, "last_id", 7) == 0) {
2235 obd_id *last_id = val;
2236 /* FIXME: object groups */
2237 *last_id = filter_last_id(&obd->u.filter, 0);
2240 CDEBUG(D_IOCTL, "invalid key\n");
2244 static int filter_set_info(struct obd_export *exp, __u32 keylen,
2245 void *key, __u32 vallen, void *val)
2247 struct obd_device *obd;
2248 struct lustre_handle conn;
2249 struct llog_ctxt *ctxt;
2253 conn.cookie = exp->exp_handle.h_cookie;
2257 CDEBUG(D_IOCTL, "invalid exp %p cookie "LPX64"\n",
2262 if (keylen < strlen("mds_conn") ||
2263 memcmp(key, "mds_conn", keylen) != 0)
2266 CWARN("Received MDS connection ("LPX64")\n", conn.cookie);
2267 memcpy(&obd->u.filter.fo_mdc_conn, &conn, sizeof(conn));
2268 ctxt = llog_get_context(obd, LLOG_UNLINK_REPL_CTXT);
2269 rc = llog_receptor_accept(ctxt, exp->exp_imp_reverse);
2273 int filter_iocontrol(unsigned int cmd, struct obd_export *exp,
2274 int len, void *karg, void *uarg)
2276 struct obd_device *obd = exp->exp_obd;
2277 struct obd_ioctl_data *data = karg;
2281 case OBD_IOC_ABORT_RECOVERY:
2282 CERROR("aborting recovery for device %s\n", obd->obd_name);
2283 target_abort_recovery(obd);
2286 case OBD_IOC_SET_READONLY: {
2288 struct super_block *sb = obd->u.filter.fo_sb;
2289 struct inode *inode = sb->s_root->d_inode;
2290 BDEVNAME_DECLARE_STORAGE(tmp);
2291 CERROR("setting device %s read-only\n",
2292 ll_bdevname(sb, tmp));
2294 handle = fsfilt_start(obd, inode, FSFILT_OP_MKNOD, NULL);
2296 (void)fsfilt_commit(obd, inode, handle, 1);
2298 dev_set_rdonly(ll_sbdev(obd->u.filter.fo_sb), 2);
2302 case OBD_IOC_CATLOGLIST: {
2303 rc = llog_catlog_list(obd, 1, data);
2307 case OBD_IOC_LLOG_CANCEL:
2308 case OBD_IOC_LLOG_REMOVE:
2309 case OBD_IOC_LLOG_INFO:
2310 case OBD_IOC_LLOG_PRINT: {
2311 /* FIXME to be finished */
2312 RETURN(-EOPNOTSUPP);
2314 struct llog_ctxt *ctxt = NULL;
2316 push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
2317 rc = llog_ioctl(ctxt, cmd, data);
2318 pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
2331 static struct llog_operations filter_unlink_repl_logops;
2332 static struct llog_operations filter_size_orig_logops = {
2333 lop_setup: llog_obd_origin_setup,
2334 lop_cleanup: llog_obd_origin_cleanup,
2335 lop_add: llog_obd_origin_add
2338 static int filter_llog_init(struct obd_device *obd, struct obd_device *tgt,
2339 int count, struct llog_catid *logid)
2341 struct llog_ctxt *ctxt;
2345 filter_unlink_repl_logops = llog_client_ops;
2346 filter_unlink_repl_logops.lop_cancel = llog_obd_repl_cancel;
2347 filter_unlink_repl_logops.lop_connect = llog_repl_connect;
2348 filter_unlink_repl_logops.lop_sync = llog_obd_repl_sync;
2350 rc = llog_setup(obd, LLOG_UNLINK_REPL_CTXT, tgt, 0, NULL,
2351 &filter_unlink_repl_logops);
2354 /* FIXME - assign unlink_cb for filter's recovery */
2355 ctxt = llog_get_context(obd, LLOG_UNLINK_REPL_CTXT);
2356 ctxt->llog_proc_cb = filter_recov_log_unlink_cb;
2358 rc = llog_setup(obd, LLOG_SIZE_ORIG_CTXT, tgt, 0, NULL,
2359 &filter_size_orig_logops);
2363 static int filter_llog_finish(struct obd_device *obd, int count)
2368 rc = llog_cleanup(llog_get_context(obd, LLOG_UNLINK_REPL_CTXT));
2372 rc = llog_cleanup(llog_get_context(obd, LLOG_SIZE_ORIG_CTXT));
2376 static struct dentry *filter_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
2379 return filter_fid2dentry(data, NULL, gr, id);
2382 static struct lvfs_callback_ops filter_lvfs_ops = {
2383 l_fid2dentry: filter_lvfs_fid2dentry,
2386 static struct obd_ops filter_obd_ops = {
2387 o_owner: THIS_MODULE,
2388 o_attach: filter_attach,
2389 o_detach: filter_detach,
2390 o_get_info: filter_get_info,
2391 o_set_info: filter_set_info,
2392 o_setup: filter_setup,
2393 o_precleanup: filter_precleanup,
2394 o_cleanup: filter_cleanup,
2395 o_connect: filter_connect,
2396 o_disconnect: filter_disconnect,
2397 o_statfs: filter_statfs,
2398 o_getattr: filter_getattr,
2399 o_unpackmd: filter_unpackmd,
2400 o_create: filter_create,
2401 o_setattr: filter_setattr,
2402 o_destroy: filter_destroy,
2404 o_punch: filter_truncate,
2405 o_sync: filter_sync,
2406 o_preprw: filter_preprw,
2407 o_commitrw: filter_commitrw,
2408 o_destroy_export: filter_destroy_export,
2409 o_llog_init: filter_llog_init,
2410 o_llog_finish: filter_llog_finish,
2411 o_iocontrol: filter_iocontrol,
2414 static struct obd_ops filter_sanobd_ops = {
2415 o_owner: THIS_MODULE,
2416 o_attach: filter_attach,
2417 o_detach: filter_detach,
2418 o_get_info: filter_get_info,
2419 o_set_info: filter_set_info,
2420 o_setup: filter_san_setup,
2421 o_precleanup: filter_precleanup,
2422 o_cleanup: filter_cleanup,
2423 o_connect: filter_connect,
2424 o_disconnect: filter_disconnect,
2425 o_statfs: filter_statfs,
2426 o_getattr: filter_getattr,
2427 o_unpackmd: filter_unpackmd,
2428 o_create: filter_create,
2429 o_setattr: filter_setattr,
2430 o_destroy: filter_destroy,
2432 o_punch: filter_truncate,
2433 o_sync: filter_sync,
2434 o_preprw: filter_preprw,
2435 o_commitrw: filter_commitrw,
2436 o_san_preprw: filter_san_preprw,
2437 o_destroy_export: filter_destroy_export,
2438 o_llog_init: filter_llog_init,
2439 o_llog_finish: filter_llog_finish,
2440 o_iocontrol: filter_iocontrol,
2443 static int __init obdfilter_init(void)
2445 struct lprocfs_static_vars lvars;
2448 printk(KERN_INFO "Lustre: Filtering OBD driver; info@clusterfs.com\n");
2450 lprocfs_init_vars(filter, &lvars);
2452 rc = class_register_type(&filter_obd_ops, lvars.module_vars,
2453 OBD_FILTER_DEVICENAME);
2457 rc = class_register_type(&filter_sanobd_ops, lvars.module_vars,
2458 OBD_FILTER_SAN_DEVICENAME);
2460 class_unregister_type(OBD_FILTER_DEVICENAME);
2464 static void __exit obdfilter_exit(void)
2466 class_unregister_type(OBD_FILTER_SAN_DEVICENAME);
2467 class_unregister_type(OBD_FILTER_DEVICENAME);
2470 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2471 MODULE_DESCRIPTION("Lustre Filtering OBD driver");
2472 MODULE_LICENSE("GPL");
2474 module_init(obdfilter_init);
2475 module_exit(obdfilter_exit);