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_mutex 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_mutex to avoid single
33 * threaded operation on the OST.
36 #define DEBUG_SUBSYSTEM S_FILTER
38 #ifndef AUTOCONF_INCLUDED
39 #include <linux/config.h>
41 #include <linux/module.h>
43 #include <linux/dcache.h>
44 #include <linux/init.h>
45 #include <linux/version.h>
46 #include <linux/sched.h>
47 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
48 # include <linux/mount.h>
49 # include <linux/buffer_head.h>
52 #include <obd_class.h>
54 #include <lustre_dlm.h>
55 #include <lustre_fsfilt.h>
56 #include <lprocfs_status.h>
57 #include <lustre_log.h>
58 #include <lustre_commit_confd.h>
59 #include <libcfs/list.h>
60 #include <lustre_disk.h>
61 #include <lustre_quota.h>
62 #include <linux/slab.h>
63 #include <lustre_param.h>
65 #include "filter_internal.h"
67 /* Group 0 is no longer a legal group, to catch uninitialized IDs */
68 #define FILTER_MIN_GROUPS 3
69 static struct lvfs_callback_ops filter_lvfs_ops;
70 cfs_mem_cache_t *ll_fmd_cachep;
72 static void filter_commit_cb(struct obd_device *obd, __u64 transno,
73 void *cb_data, int error)
75 obd_transno_commit_cb(obd, transno, error);
78 /* Assumes caller has already pushed us into the kernel context. */
79 int filter_finish_transno(struct obd_export *exp, struct obd_trans_info *oti,
80 int rc, int force_sync)
82 struct filter_obd *filter = &exp->exp_obd->u.filter;
83 struct filter_export_data *fed = &exp->exp_filter_data;
84 struct filter_client_data *fcd = fed->fed_fcd;
87 int err, log_pri = D_HA;
89 /* Propagate error code. */
93 if (!exp->exp_obd->obd_replayable || oti == NULL)
96 /* we don't allocate new transnos for replayed requests */
97 if (oti->oti_transno == 0) {
98 spin_lock(&filter->fo_translock);
99 last_rcvd = le64_to_cpu(filter->fo_fsd->lsd_last_transno) + 1;
100 filter->fo_fsd->lsd_last_transno = cpu_to_le64(last_rcvd);
101 spin_unlock(&filter->fo_translock);
102 oti->oti_transno = last_rcvd;
104 spin_lock(&filter->fo_translock);
105 last_rcvd = oti->oti_transno;
106 if (last_rcvd > le64_to_cpu(filter->fo_fsd->lsd_last_transno))
107 filter->fo_fsd->lsd_last_transno =
108 cpu_to_le64(last_rcvd);
109 spin_unlock(&filter->fo_translock);
111 fcd->fcd_last_rcvd = cpu_to_le64(last_rcvd);
113 /* could get xid from oti, if it's ever needed */
114 fcd->fcd_last_xid = 0;
116 off = fed->fed_lr_off;
118 CERROR("%s: client idx %d is %lld\n", exp->exp_obd->obd_name,
119 fed->fed_lr_idx, fed->fed_lr_off);
123 force_sync = fsfilt_add_journal_cb(exp->exp_obd,
129 err = fsfilt_write_record(exp->exp_obd, filter->fo_rcvd_filp,
130 fcd, sizeof(*fcd), &off,
131 force_sync | exp->exp_need_sync);
133 filter_commit_cb(exp->exp_obd, last_rcvd, NULL, err);
141 CDEBUG(log_pri, "wrote trans "LPU64" for client %s at #%d: err = %d\n",
142 last_rcvd, fcd->fcd_uuid, fed->fed_lr_idx, err);
147 void f_dput(struct dentry *dentry)
149 /* Can't go inside filter_ddelete because it can block */
150 CDEBUG(D_INODE, "putting %s: %p, count = %d\n",
151 dentry->d_name.name, dentry, atomic_read(&dentry->d_count) - 1);
152 LASSERT(atomic_read(&dentry->d_count) > 0);
157 static void init_brw_stats(struct brw_stats *brw_stats)
160 for (i = 0; i < BRW_LAST; i++)
161 spin_lock_init(&brw_stats->hist[i].oh_lock);
164 /* brw_stats are 2128, ops are 3916, ldlm are 204, so 6248 bytes per client,
165 plus the procfs overhead :( */
166 static int filter_export_stats_init(struct obd_device *obd,
167 struct obd_export *exp)
169 struct filter_export_data *fed = &exp->exp_filter_data;
170 struct proc_dir_entry *brw_entry;
174 init_brw_stats(&fed->fed_brw_stats);
176 if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid))
177 /* Self-export gets no proc entry */
180 rc = lprocfs_exp_setup(exp);
184 /* Create a per export proc entry for brw_stats */
185 brw_entry = create_proc_entry("brw_stats", 0644, exp->exp_proc);
186 if (brw_entry == NULL)
188 brw_entry->proc_fops = &filter_per_export_stats_fops;
189 brw_entry->data = fed;
191 /* Create a per export proc entry for ops stats */
192 num_stats = (sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
193 LPROC_FILTER_LAST - 1;
194 exp->exp_ops_stats = lprocfs_alloc_stats(num_stats);
195 if (exp->exp_ops_stats == NULL)
197 lprocfs_init_ops_stats(LPROC_FILTER_LAST, exp->exp_ops_stats);
198 lprocfs_counter_init(exp->exp_ops_stats, LPROC_FILTER_READ_BYTES,
199 LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes");
200 lprocfs_counter_init(exp->exp_ops_stats, LPROC_FILTER_WRITE_BYTES,
201 LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes");
202 lprocfs_register_stats(exp->exp_proc, "stats", exp->exp_ops_stats);
206 /* Add client data to the FILTER. We use a bitmap to locate a free space
207 * in the last_rcvd file if cl_idx is -1 (i.e. a new client).
208 * Otherwise, we have just read the data from the last_rcvd file and
209 * we know its offset. */
210 static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
213 struct filter_obd *filter = &obd->u.filter;
214 struct filter_export_data *fed = &exp->exp_filter_data;
215 unsigned long *bitmap = filter->fo_last_rcvd_slots;
216 int new_client = (cl_idx == -1);
220 LASSERT(bitmap != NULL);
221 LASSERTF(cl_idx > -2, "%d\n", cl_idx);
224 if (strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid) == 0)
227 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
228 * there's no need for extra complication here
231 cl_idx = find_first_zero_bit(bitmap, LR_MAX_CLIENTS);
233 if (cl_idx >= LR_MAX_CLIENTS) {
234 CERROR("no room for %u client - fix LR_MAX_CLIENTS\n",
238 if (test_and_set_bit(cl_idx, bitmap)) {
239 cl_idx = find_next_zero_bit(bitmap, LR_MAX_CLIENTS,
244 if (test_and_set_bit(cl_idx, bitmap)) {
245 CERROR("FILTER client %d: bit already set in bitmap!\n",
251 fed->fed_lr_idx = cl_idx;
252 fed->fed_lr_off = le32_to_cpu(filter->fo_fsd->lsd_client_start) +
253 cl_idx * le16_to_cpu(filter->fo_fsd->lsd_client_size);
254 LASSERTF(fed->fed_lr_off > 0, "fed_lr_off = %llu\n", fed->fed_lr_off);
256 CDEBUG(D_INFO, "client at index %d (%llu) with UUID '%s' added\n",
257 fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
260 struct lvfs_run_ctxt saved;
261 loff_t off = fed->fed_lr_off;
265 CDEBUG(D_INFO, "writing client fcd at idx %u (%llu) (len %u)\n",
266 fed->fed_lr_idx,off,(unsigned int)sizeof(*fed->fed_fcd));
268 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
269 /* Transaction needed to fix bug 1403 */
270 handle = fsfilt_start(obd,
271 filter->fo_rcvd_filp->f_dentry->d_inode,
272 FSFILT_OP_SETATTR, NULL);
273 if (IS_ERR(handle)) {
274 rc = PTR_ERR(handle);
275 CERROR("unable to start transaction: rc %d\n", rc);
277 rc = fsfilt_add_journal_cb(obd, 0, handle,
278 target_client_add_cb, exp);
280 spin_lock(&exp->exp_lock);
281 exp->exp_need_sync = 1;
282 spin_unlock(&exp->exp_lock);
284 rc = fsfilt_write_record(obd, filter->fo_rcvd_filp,
286 sizeof(*fed->fed_fcd),
287 &off, rc /* sync if no cb */);
289 filter->fo_rcvd_filp->f_dentry->d_inode,
292 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
295 CERROR("error writing %s client idx %u: rc %d\n",
296 LAST_RCVD, fed->fed_lr_idx, rc);
303 static int filter_client_free(struct obd_export *exp)
305 struct filter_export_data *fed = &exp->exp_filter_data;
306 struct filter_obd *filter = &exp->exp_obd->u.filter;
307 struct obd_device *obd = exp->exp_obd;
308 struct filter_client_data zero_fcd;
309 struct lvfs_run_ctxt saved;
314 if (fed->fed_fcd == NULL)
317 /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
318 if (strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid ) == 0)
321 CDEBUG(D_INFO, "freeing client at idx %u, offset %lld with UUID '%s'\n",
322 fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
324 LASSERT(filter->fo_last_rcvd_slots != NULL);
326 off = fed->fed_lr_off;
328 /* Don't clear fed_lr_idx here as it is likely also unset. At worst
329 * we leak a client slot that will be cleaned on the next recovery. */
331 CERROR("%s: client idx %d has med_off %lld\n",
332 obd->obd_name, fed->fed_lr_idx, off);
333 GOTO(free, rc = -EINVAL);
336 /* Clear the bit _after_ zeroing out the client so we don't
337 race with filter_client_add and zero out new clients.*/
338 if (!test_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
339 CERROR("FILTER client %u: bit already clear in bitmap!!\n",
344 if (!(exp->exp_flags & OBD_OPT_FAILOVER)) {
345 memset(&zero_fcd, 0, sizeof zero_fcd);
346 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
347 rc = fsfilt_write_record(obd, filter->fo_rcvd_filp, &zero_fcd,
348 sizeof(zero_fcd), &off,
349 (!exp->exp_libclient ||
350 exp->exp_need_sync));
352 /* update server's transno */
353 filter_update_server_data(obd, filter->fo_rcvd_filp,
355 !exp->exp_libclient);
356 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
358 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
359 "zeroing out client %s at idx %u (%llu) in %s rc %d\n",
360 fed->fed_fcd->fcd_uuid, fed->fed_lr_idx, fed->fed_lr_off,
364 if (!test_and_clear_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
365 CERROR("FILTER client %u: bit already clear in bitmap!!\n",
372 OBD_FREE(fed->fed_fcd, sizeof(*fed->fed_fcd));
378 /* drop fmd reference, free it if last ref. must be called with fed_lock held.*/
379 static inline void filter_fmd_put_nolock(struct filter_export_data *fed,
380 struct filter_mod_data *fmd)
382 LASSERT_SPIN_LOCKED(&fed->fed_lock);
383 if (--fmd->fmd_refcount == 0) {
384 /* XXX when we have persistent reservations and the handle
385 * is stored herein we need to drop it here. */
386 fed->fed_mod_count--;
387 list_del(&fmd->fmd_list);
388 OBD_SLAB_FREE(fmd, ll_fmd_cachep, sizeof(*fmd));
392 /* drop fmd reference, free it if last ref */
393 void filter_fmd_put(struct obd_export *exp, struct filter_mod_data *fmd)
395 struct filter_export_data *fed;
400 fed = &exp->exp_filter_data;
401 spin_lock(&fed->fed_lock);
402 filter_fmd_put_nolock(fed, fmd); /* caller reference */
403 spin_unlock(&fed->fed_lock);
406 /* expire entries from the end of the list if there are too many
407 * or they are too old */
408 static void filter_fmd_expire_nolock(struct filter_obd *filter,
409 struct filter_export_data *fed,
410 struct filter_mod_data *keep)
412 struct filter_mod_data *fmd, *tmp;
414 list_for_each_entry_safe(fmd, tmp, &fed->fed_mod_list, fmd_list) {
418 if (time_before(jiffies, fmd->fmd_expire) &&
419 fed->fed_mod_count < filter->fo_fmd_max_num)
422 list_del_init(&fmd->fmd_list);
423 filter_fmd_put_nolock(fed, fmd); /* list reference */
427 void filter_fmd_expire(struct obd_export *exp)
429 spin_lock(&exp->exp_filter_data.fed_lock);
430 filter_fmd_expire_nolock(&exp->exp_obd->u.filter,
431 &exp->exp_filter_data, NULL);
432 spin_unlock(&exp->exp_filter_data.fed_lock);
435 /* find specified objid, group in export fmd list.
436 * caller must hold fed_lock and take fmd reference itself */
437 static struct filter_mod_data *filter_fmd_find_nolock(struct filter_obd *filter,
438 struct filter_export_data *fed,
439 obd_id objid, obd_gr group)
441 struct filter_mod_data *found = NULL, *fmd;
443 LASSERT_SPIN_LOCKED(&fed->fed_lock);
445 list_for_each_entry_reverse(fmd, &fed->fed_mod_list, fmd_list) {
446 if (fmd->fmd_id == objid && fmd->fmd_gr == group) {
448 list_del(&fmd->fmd_list);
449 list_add_tail(&fmd->fmd_list, &fed->fed_mod_list);
450 fmd->fmd_expire = jiffies + filter->fo_fmd_max_age;
455 filter_fmd_expire_nolock(filter, fed, found);
460 /* Find fmd based on objid and group, or return NULL if not found. */
461 struct filter_mod_data *filter_fmd_find(struct obd_export *exp,
462 obd_id objid, obd_gr group)
464 struct filter_mod_data *fmd;
466 spin_lock(&exp->exp_filter_data.fed_lock);
467 fmd = filter_fmd_find_nolock(&exp->exp_obd->u.filter,
468 &exp->exp_filter_data, objid, group);
470 fmd->fmd_refcount++; /* caller reference */
471 spin_unlock(&exp->exp_filter_data.fed_lock);
476 /* Find fmd based on objid and group, or create a new one if none is found.
477 * It is possible for this function to return NULL under memory pressure,
478 * or if objid = 0 is passed (which will only cause old entries to expire).
479 * Currently this is not fatal because any fmd state is transient and
480 * may also be freed when it gets sufficiently old. */
481 struct filter_mod_data *filter_fmd_get(struct obd_export *exp,
482 obd_id objid, obd_gr group)
484 struct filter_export_data *fed = &exp->exp_filter_data;
485 struct filter_mod_data *found = NULL, *fmd_new = NULL;
487 OBD_SLAB_ALLOC(fmd_new, ll_fmd_cachep, CFS_ALLOC_IO, sizeof(*fmd_new));
489 spin_lock(&fed->fed_lock);
490 found = filter_fmd_find_nolock(&exp->exp_obd->u.filter,fed,objid,group);
493 list_add_tail(&fmd_new->fmd_list, &fed->fed_mod_list);
494 fmd_new->fmd_id = objid;
495 fmd_new->fmd_gr = group;
496 fmd_new->fmd_refcount++; /* list reference */
498 fed->fed_mod_count++;
500 OBD_SLAB_FREE(fmd_new, ll_fmd_cachep, sizeof(*fmd_new));
504 found->fmd_refcount++; /* caller reference */
505 found->fmd_expire = jiffies +
506 exp->exp_obd->u.filter.fo_fmd_max_age;
509 spin_unlock(&fed->fed_lock);
515 /* drop fmd list reference so it will disappear when last reference is put.
516 * This isn't so critical because it would in fact only affect the one client
517 * that is doing the unlink and at worst we have an stale entry referencing
518 * an object that should never be used again. */
519 static void filter_fmd_drop(struct obd_export *exp, obd_id objid, obd_gr group)
521 struct filter_mod_data *found = NULL;
523 spin_lock(&exp->exp_filter_data.fed_lock);
524 found = filter_fmd_find_nolock(&exp->exp_filter_data, objid, group);
526 list_del_init(&found->fmd_list);
527 filter_fmd_put_nolock(&exp->exp_filter_data, found);
529 spin_unlock(&exp->exp_filter_data.fed_lock);
532 #define filter_fmd_drop(exp, objid, group)
535 /* remove all entries from fmd list */
536 static void filter_fmd_cleanup(struct obd_export *exp)
538 struct filter_export_data *fed = &exp->exp_filter_data;
539 struct filter_mod_data *fmd = NULL, *tmp;
541 spin_lock(&fed->fed_lock);
542 list_for_each_entry_safe(fmd, tmp, &fed->fed_mod_list, fmd_list) {
543 list_del_init(&fmd->fmd_list);
544 filter_fmd_put_nolock(fed, fmd);
546 spin_unlock(&fed->fed_lock);
549 static int filter_init_export(struct obd_export *exp)
551 spin_lock_init(&exp->exp_filter_data.fed_lock);
552 INIT_LIST_HEAD(&exp->exp_filter_data.fed_mod_list);
554 spin_lock(&exp->exp_lock);
555 exp->exp_connecting = 1;
556 spin_unlock(&exp->exp_lock);
561 static int filter_free_server_data(struct filter_obd *filter)
563 OBD_FREE(filter->fo_fsd, sizeof(*filter->fo_fsd));
564 filter->fo_fsd = NULL;
565 OBD_FREE(filter->fo_last_rcvd_slots, LR_MAX_CLIENTS / 8);
566 filter->fo_last_rcvd_slots = NULL;
570 /* assumes caller is already in kernel ctxt */
571 int filter_update_server_data(struct obd_device *obd, struct file *filp,
572 struct lr_server_data *fsd, int force_sync)
578 CDEBUG(D_INODE, "server uuid : %s\n", fsd->lsd_uuid);
579 CDEBUG(D_INODE, "server last_rcvd : "LPU64"\n",
580 le64_to_cpu(fsd->lsd_last_transno));
581 CDEBUG(D_INODE, "server last_mount: "LPU64"\n",
582 le64_to_cpu(fsd->lsd_mount_count));
584 fsd->lsd_compat14 = fsd->lsd_last_transno;
585 rc = fsfilt_write_record(obd, filp, fsd, sizeof(*fsd), &off, force_sync);
587 CERROR("error writing lr_server_data: rc = %d\n", rc);
592 int filter_update_last_objid(struct obd_device *obd, obd_gr group,
595 struct filter_obd *filter = &obd->u.filter;
601 if (filter->fo_last_objid_files[group] == NULL) {
602 CERROR("Object group "LPU64" not fully setup; not updating "
603 "last_objid\n", group);
607 CDEBUG(D_INODE, "%s: server last_objid for group "LPU64": "LPU64"\n",
608 obd->obd_name, group, filter->fo_last_objids[group]);
610 tmp = cpu_to_le64(filter->fo_last_objids[group]);
611 rc = fsfilt_write_record(obd, filter->fo_last_objid_files[group],
612 &tmp, sizeof(tmp), &off, force_sync);
614 CERROR("error writing group "LPU64" last objid: rc = %d\n",
618 extern int ost_handle(struct ptlrpc_request *req);
619 /* assumes caller has already in kernel ctxt */
620 static int filter_init_server_data(struct obd_device *obd, struct file * filp)
622 struct filter_obd *filter = &obd->u.filter;
623 struct lr_server_data *fsd;
624 struct filter_client_data *fcd = NULL;
625 struct inode *inode = filp->f_dentry->d_inode;
626 unsigned long last_rcvd_size = i_size_read(inode);
632 /* ensure padding in the struct is the correct size */
633 CLASSERT (offsetof(struct lr_server_data, lsd_padding) +
634 sizeof(fsd->lsd_padding) == LR_SERVER_SIZE);
635 CLASSERT (offsetof(struct filter_client_data, fcd_padding) +
636 sizeof(fcd->fcd_padding) == LR_CLIENT_SIZE);
638 OBD_ALLOC(fsd, sizeof(*fsd));
641 filter->fo_fsd = fsd;
643 OBD_ALLOC(filter->fo_last_rcvd_slots, LR_MAX_CLIENTS / 8);
644 if (filter->fo_last_rcvd_slots == NULL) {
645 OBD_FREE(fsd, sizeof(*fsd));
649 if (last_rcvd_size == 0) {
650 LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name);
652 memcpy(fsd->lsd_uuid, obd->obd_uuid.uuid,sizeof(fsd->lsd_uuid));
653 fsd->lsd_last_transno = 0;
654 mount_count = fsd->lsd_mount_count = 0;
655 fsd->lsd_server_size = cpu_to_le32(LR_SERVER_SIZE);
656 fsd->lsd_client_start = cpu_to_le32(LR_CLIENT_START);
657 fsd->lsd_client_size = cpu_to_le16(LR_CLIENT_SIZE);
658 fsd->lsd_subdir_count = cpu_to_le16(FILTER_SUBDIR_COUNT);
659 filter->fo_subdir_count = FILTER_SUBDIR_COUNT;
660 fsd->lsd_feature_incompat = cpu_to_le32(OBD_INCOMPAT_OST);
662 rc = fsfilt_read_record(obd, filp, fsd, sizeof(*fsd), &off);
664 CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
668 if (strcmp(fsd->lsd_uuid, obd->obd_uuid.uuid) != 0) {
669 LCONSOLE_ERROR_MSG(0x134, "Trying to start OBD %s "
670 "using the wrong disk %s. Were the "
671 "/dev/ assignments rearranged?\n",
672 obd->obd_uuid.uuid, fsd->lsd_uuid);
673 GOTO(err_fsd, rc = -EINVAL);
675 mount_count = le64_to_cpu(fsd->lsd_mount_count);
676 filter->fo_subdir_count = le16_to_cpu(fsd->lsd_subdir_count);
678 /* Assume old last_rcvd format unless I_C_LR is set */
679 if (!(fsd->lsd_feature_incompat &
680 cpu_to_le32(OBD_INCOMPAT_COMMON_LR)))
681 fsd->lsd_last_transno = fsd->lsd_compat14;
685 if (fsd->lsd_feature_incompat & ~cpu_to_le32(FILTER_INCOMPAT_SUPP)) {
686 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
687 obd->obd_name, le32_to_cpu(fsd->lsd_feature_incompat) &
688 ~FILTER_INCOMPAT_SUPP);
689 GOTO(err_fsd, rc = -EINVAL);
691 if (fsd->lsd_feature_rocompat & ~cpu_to_le32(FILTER_ROCOMPAT_SUPP)) {
692 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
693 obd->obd_name, le32_to_cpu(fsd->lsd_feature_rocompat) &
694 ~FILTER_ROCOMPAT_SUPP);
695 /* Do something like remount filesystem read-only */
696 GOTO(err_fsd, rc = -EINVAL);
699 CDEBUG(D_INODE, "%s: server last_transno : "LPU64"\n",
700 obd->obd_name, le64_to_cpu(fsd->lsd_last_transno));
701 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
702 obd->obd_name, mount_count + 1);
703 CDEBUG(D_INODE, "%s: server data size: %u\n",
704 obd->obd_name, le32_to_cpu(fsd->lsd_server_size));
705 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
706 obd->obd_name, le32_to_cpu(fsd->lsd_client_start));
707 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
708 obd->obd_name, le32_to_cpu(fsd->lsd_client_size));
709 CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
710 obd->obd_name, le16_to_cpu(fsd->lsd_subdir_count));
711 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
712 last_rcvd_size <= le32_to_cpu(fsd->lsd_client_start) ? 0 :
713 (last_rcvd_size - le32_to_cpu(fsd->lsd_client_start)) /
714 le16_to_cpu(fsd->lsd_client_size));
716 if (!obd->obd_replayable) {
717 CWARN("%s: recovery support OFF\n", obd->obd_name);
721 for (cl_idx = 0, off = le32_to_cpu(fsd->lsd_client_start);
722 off < last_rcvd_size; cl_idx++) {
724 struct obd_export *exp;
725 struct filter_export_data *fed;
728 OBD_ALLOC(fcd, sizeof(*fcd));
730 GOTO(err_client, rc = -ENOMEM);
733 /* Don't assume off is incremented properly by
734 * fsfilt_read_record(), in case sizeof(*fcd)
735 * isn't the same as fsd->lsd_client_size. */
736 off = le32_to_cpu(fsd->lsd_client_start) +
737 cl_idx * le16_to_cpu(fsd->lsd_client_size);
738 rc = fsfilt_read_record(obd, filp, fcd, sizeof(*fcd), &off);
740 CERROR("error reading FILT %s idx %d off %llu: rc %d\n",
741 LAST_RCVD, cl_idx, off, rc);
742 break; /* read error shouldn't cause startup to fail */
745 if (fcd->fcd_uuid[0] == '\0') {
746 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
751 last_rcvd = le64_to_cpu(fcd->fcd_last_rcvd);
753 /* These exports are cleaned up by filter_disconnect(), so they
754 * need to be set up like real exports as filter_connect() does.
756 exp = class_new_export(obd, (struct obd_uuid *)fcd->fcd_uuid);
758 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
759 " srv lr: "LPU64" fcd_group %d\n", fcd->fcd_uuid, cl_idx,
760 last_rcvd, le64_to_cpu(fsd->lsd_last_transno),
761 le32_to_cpu(fcd->fcd_group));
763 if (PTR_ERR(exp) == -EALREADY) {
764 /* export already exists, zero out this one */
765 CERROR("Zeroing out duplicate export due to "
767 fcd->fcd_uuid[0] = '\0';
769 GOTO(err_client, rc = PTR_ERR(exp));
772 fed = &exp->exp_filter_data;
774 fed->fed_group = le32_to_cpu(fcd->fcd_group);
775 filter_export_stats_init(obd, exp);
776 rc = filter_client_add(obd, exp, cl_idx);
777 /* can't fail for existing client */
778 LASSERTF(rc == 0, "rc = %d\n", rc);
781 spin_lock(&exp->exp_lock);
782 exp->exp_connecting = 0;
783 exp->exp_in_recovery = 0;
784 spin_unlock(&exp->exp_lock);
785 obd->obd_max_recoverable_clients++;
786 class_export_put(exp);
789 /* Need to check last_rcvd even for duplicated exports. */
790 CDEBUG(D_OTHER, "client at idx %d has last_rcvd = "LPU64"\n",
793 if (last_rcvd > le64_to_cpu(fsd->lsd_last_transno))
794 fsd->lsd_last_transno = cpu_to_le64(last_rcvd);
798 OBD_FREE(fcd, sizeof(*fcd));
800 obd->obd_last_committed = le64_to_cpu(fsd->lsd_last_transno);
802 target_recovery_init(obd, ost_handle);
805 filter->fo_mount_count = mount_count + 1;
806 fsd->lsd_mount_count = cpu_to_le64(filter->fo_mount_count);
808 /* save it, so mount count and last_transno is current */
809 rc = filter_update_server_data(obd, filp, filter->fo_fsd, 1);
811 GOTO(err_client, rc);
816 target_recovery_fini(obd);
818 filter_free_server_data(filter);
822 static int filter_cleanup_groups(struct obd_device *obd)
824 struct filter_obd *filter = &obd->u.filter;
826 struct dentry *dentry;
830 if (filter->fo_dentry_O_groups != NULL) {
831 for (i = 0; i < filter->fo_group_count; i++) {
832 dentry = filter->fo_dentry_O_groups[i];
836 OBD_FREE(filter->fo_dentry_O_groups,
837 filter->fo_group_count *
838 sizeof(*filter->fo_dentry_O_groups));
839 filter->fo_dentry_O_groups = NULL;
841 if (filter->fo_last_objid_files != NULL) {
842 for (i = 0; i < filter->fo_group_count; i++) {
843 filp = filter->fo_last_objid_files[i];
847 OBD_FREE(filter->fo_last_objid_files,
848 filter->fo_group_count *
849 sizeof(*filter->fo_last_objid_files));
850 filter->fo_last_objid_files = NULL;
852 if (filter->fo_dentry_O_sub != NULL) {
853 for (i = 0; i < filter->fo_group_count; i++) {
854 for (j = 0; j < filter->fo_subdir_count; j++) {
855 dentry = filter->fo_dentry_O_sub[i].dentry[j];
860 OBD_FREE(filter->fo_dentry_O_sub,
861 filter->fo_group_count *
862 sizeof(*filter->fo_dentry_O_sub));
863 filter->fo_dentry_O_sub = NULL;
865 if (filter->fo_last_objids != NULL) {
866 OBD_FREE(filter->fo_last_objids,
867 filter->fo_group_count *
868 sizeof(*filter->fo_last_objids));
869 filter->fo_last_objids = NULL;
871 if (filter->fo_dentry_O != NULL) {
872 f_dput(filter->fo_dentry_O);
873 filter->fo_dentry_O = NULL;
878 static int filter_update_last_group(struct obd_device *obd, int group)
880 struct filter_obd *filter = &obd->u.filter;
881 struct file *filp = NULL;
882 int last_group = 0, rc;
886 if (group <= filter->fo_committed_group)
889 filp = filp_open("LAST_GROUP", O_RDWR, 0700);
893 CERROR("cannot open LAST_GROUP: rc = %d\n", rc);
897 rc = fsfilt_read_record(obd, filp, &last_group, sizeof(__u32), &off);
899 CDEBUG(D_INODE, "error reading LAST_GROUP: rc %d\n",rc);
902 LASSERT(off == 0 || last_group >= FILTER_MIN_GROUPS);
903 CDEBUG(D_INODE, "%s: previous %d, new %d\n",
904 obd->obd_name, last_group, group);
908 /* must be sync: bXXXX */
909 rc = fsfilt_write_record(obd, filp, &last_group, sizeof(__u32), &off, 1);
911 CDEBUG(D_INODE, "error updating LAST_GROUP: rc %d\n", rc);
915 filter->fo_committed_group = group;
922 static int filter_read_group_internal(struct obd_device *obd, int group,
925 struct filter_obd *filter = &obd->u.filter;
926 __u64 *new_objids = NULL;
927 struct filter_subdirs *new_subdirs = NULL, *tmp_subdirs = NULL;
928 struct dentry **new_groups = NULL;
929 struct file **new_files = NULL;
930 struct dentry *dentry;
932 int old_count = filter->fo_group_count, rc, stage = 0, i;
938 snprintf(name, 24, "%d", group);
942 dentry = ll_lookup_one_len(name, filter->fo_dentry_O,
944 if (IS_ERR(dentry)) {
945 CERROR("Cannot lookup expected object group %d: %ld\n",
946 group, PTR_ERR(dentry));
947 RETURN(PTR_ERR(dentry));
950 dentry = simple_mkdir(filter->fo_dentry_O, name, 0700, 1);
951 if (IS_ERR(dentry)) {
952 CERROR("cannot lookup/create O/%s: rc = %ld\n", name,
954 RETURN(PTR_ERR(dentry));
959 snprintf(name, 24, "O/%d/LAST_ID", group);
961 filp = filp_open(name, O_CREAT | O_RDWR, 0700);
963 CERROR("cannot create %s: rc = %ld\n", name, PTR_ERR(filp));
964 GOTO(cleanup, rc = PTR_ERR(filp));
968 rc = fsfilt_read_record(obd, filp, &last_objid, sizeof(__u64), &off);
970 CDEBUG(D_INODE, "error reading %s: rc %d\n", name, rc);
974 if (filter->fo_subdir_count) {
975 OBD_ALLOC(tmp_subdirs, sizeof(*tmp_subdirs));
976 if (tmp_subdirs == NULL)
977 GOTO(cleanup, rc = -ENOMEM);
980 for (i = 0; i < filter->fo_subdir_count; i++) {
982 snprintf(dir, sizeof(dir), "d%u", i);
984 tmp_subdirs->dentry[i] = simple_mkdir(dentry, dir, 0700, 1);
985 if (IS_ERR(tmp_subdirs->dentry[i])) {
986 rc = PTR_ERR(tmp_subdirs->dentry[i]);
987 CERROR("can't lookup/create O/%d/%s: rc = %d\n",
992 CDEBUG(D_INODE, "got/created O/%d/%s: %p\n", group, dir,
993 tmp_subdirs->dentry[i]);
997 /* 'group' is an index; we need an array of length 'group + 1' */
998 if (group + 1 > old_count) {
999 OBD_ALLOC(new_objids, len * sizeof(*new_objids));
1000 OBD_ALLOC(new_subdirs, len * sizeof(*new_subdirs));
1001 OBD_ALLOC(new_groups, len * sizeof(*new_groups));
1002 OBD_ALLOC(new_files, len * sizeof(*new_files));
1004 if (new_objids == NULL || new_subdirs == NULL ||
1005 new_groups == NULL || new_files == NULL)
1006 GOTO(cleanup, rc = -ENOMEM);
1009 memcpy(new_objids, filter->fo_last_objids,
1010 old_count * sizeof(*new_objids));
1011 memcpy(new_subdirs, filter->fo_dentry_O_sub,
1012 old_count * sizeof(*new_subdirs));
1013 memcpy(new_groups, filter->fo_dentry_O_groups,
1014 old_count * sizeof(*new_groups));
1015 memcpy(new_files, filter->fo_last_objid_files,
1016 old_count * sizeof(*new_files));
1018 OBD_FREE(filter->fo_last_objids,
1019 old_count * sizeof(*new_objids));
1020 OBD_FREE(filter->fo_dentry_O_sub,
1021 old_count * sizeof(*new_subdirs));
1022 OBD_FREE(filter->fo_dentry_O_groups,
1023 old_count * sizeof(*new_groups));
1024 OBD_FREE(filter->fo_last_objid_files,
1025 old_count * sizeof(*new_files));
1027 filter->fo_last_objids = new_objids;
1028 filter->fo_dentry_O_sub = new_subdirs;
1029 filter->fo_dentry_O_groups = new_groups;
1030 filter->fo_last_objid_files = new_files;
1031 filter->fo_group_count = len;
1034 filter->fo_dentry_O_groups[group] = dentry;
1035 filter->fo_last_objid_files[group] = filp;
1036 if (filter->fo_subdir_count) {
1037 filter->fo_dentry_O_sub[group] = *tmp_subdirs;
1038 OBD_FREE(tmp_subdirs, sizeof(*tmp_subdirs));
1041 filter_update_last_group(obd, group);
1043 if (i_size_read(filp->f_dentry->d_inode) == 0) {
1044 filter->fo_last_objids[group] = FILTER_INIT_OBJID;
1045 rc = filter_update_last_objid(obd, group, 1);
1049 filter->fo_last_objids[group] = le64_to_cpu(last_objid);
1050 CDEBUG(D_INODE, "%s: server last_objid group %d: "LPU64"\n",
1051 obd->obd_name, group, last_objid);
1056 if (new_objids != NULL)
1057 OBD_FREE(new_objids, len * sizeof(*new_objids));
1058 if (new_subdirs != NULL)
1059 OBD_FREE(new_subdirs, len * sizeof(*new_subdirs));
1060 if (new_groups != NULL)
1061 OBD_FREE(new_groups, len * sizeof(*new_groups));
1062 if (new_files != NULL)
1063 OBD_FREE(new_files, len * sizeof(*new_files));
1065 if (filter->fo_subdir_count) {
1066 for (i = 0; i < filter->fo_subdir_count; i++) {
1067 if (tmp_subdirs->dentry[i] != NULL)
1068 dput(tmp_subdirs->dentry[i]);
1070 OBD_FREE(tmp_subdirs, sizeof(*tmp_subdirs));
1073 filp_close(filp, 0);
1080 static int filter_read_groups(struct obd_device *obd, int last_group,
1083 struct filter_obd *filter = &obd->u.filter;
1084 int old_count, group, rc = 0;
1086 down(&filter->fo_init_lock);
1087 old_count = filter->fo_group_count;
1088 for (group = old_count; group <= last_group; group++) {
1090 continue; /* no group zero */
1092 rc = filter_read_group_internal(obd, group, create);
1096 up(&filter->fo_init_lock);
1100 /* FIXME: object groups */
1101 static int filter_prep_groups(struct obd_device *obd)
1103 struct filter_obd *filter = &obd->u.filter;
1104 struct dentry *dentry, *O_dentry;
1106 int last_group, rc = 0, cleanup_phase = 0;
1110 O_dentry = simple_mkdir(current->fs->pwd, "O", 0700, 1);
1111 CDEBUG(D_INODE, "got/created O: %p\n", O_dentry);
1112 if (IS_ERR(O_dentry)) {
1113 rc = PTR_ERR(O_dentry);
1114 CERROR("cannot open/create O: rc = %d\n", rc);
1117 filter->fo_dentry_O = O_dentry;
1118 cleanup_phase = 1; /* O_dentry */
1120 /* Lookup "R" to tell if we're on an old OST FS and need to convert
1121 * from O/R/<dir>/<objid> to O/0/<dir>/<objid>. This can be removed
1122 * some time post 1.0 when all old-style OSTs have converted along
1123 * with the init_objid hack. */
1124 dentry = ll_lookup_one_len("R", O_dentry, 1);
1126 GOTO(cleanup, rc = PTR_ERR(dentry));
1127 if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)) {
1128 struct dentry *O0_dentry = lookup_one_len("0", O_dentry, 1);
1131 CWARN("converting OST to new object layout\n");
1132 if (IS_ERR(O0_dentry)) {
1133 rc = PTR_ERR(O0_dentry);
1134 CERROR("error looking up O/0: rc %d\n", rc);
1135 GOTO(cleanup_R, rc);
1138 if (O0_dentry->d_inode) {
1139 CERROR("Both O/R and O/0 exist. Fix manually.\n");
1140 GOTO(cleanup_O0, rc = -EEXIST);
1143 LOCK_INODE_MUTEX(O_dentry->d_inode);
1144 rc = vfs_rename(O_dentry->d_inode, dentry,
1145 O_dentry->d_inode, O0_dentry);
1146 UNLOCK_INODE_MUTEX(O_dentry->d_inode);
1149 CERROR("error renaming O/R to O/0: rc %d\n", rc);
1150 GOTO(cleanup_O0, rc);
1152 filter->fo_fsd->lsd_feature_incompat |=
1153 cpu_to_le32(OBD_INCOMPAT_GROUPS);
1154 rc = filter_update_server_data(obd, filter->fo_rcvd_filp,
1156 GOTO(cleanup_O0, rc);
1168 cleanup_phase = 2; /* groups */
1170 /* we have to initialize all groups before first connections from
1171 * clients because they may send create/destroy for any group -bzzz */
1172 filp = filp_open("LAST_GROUP", O_CREAT | O_RDWR, 0700);
1174 CERROR("cannot create LAST_GROUP: rc = %ld\n", PTR_ERR(filp));
1175 GOTO(cleanup, rc = PTR_ERR(filp));
1177 cleanup_phase = 3; /* filp */
1179 rc = fsfilt_read_record(obd, filp, &last_group, sizeof(__u32), &off);
1181 CDEBUG(D_INODE, "error reading LAST_GROUP: rc %d\n", rc);
1185 last_group = FILTER_MIN_GROUPS;
1187 LASSERT(last_group >= FILTER_MIN_GROUPS);
1190 CWARN("%s: initialize groups [%d,%d]\n", obd->obd_name,
1191 FILTER_MIN_GROUPS, last_group);
1192 filter->fo_committed_group = last_group;
1193 rc = filter_read_groups(obd, last_group, 1);
1197 filp_close(filp, 0);
1201 switch (cleanup_phase) {
1203 filp_close(filp, 0);
1205 filter_cleanup_groups(obd);
1207 f_dput(filter->fo_dentry_O);
1208 filter->fo_dentry_O = NULL;
1216 /* setup the object store with correct subdirectories */
1217 static int filter_prep(struct obd_device *obd)
1219 struct lvfs_run_ctxt saved;
1220 struct filter_obd *filter = &obd->u.filter;
1222 struct inode *inode;
1226 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1227 file = filp_open(LAST_RCVD, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
1228 if (!file || IS_ERR(file)) {
1230 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
1234 filter->fo_rcvd_filp = file;
1235 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1236 CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
1237 file->f_dentry->d_inode->i_mode);
1238 GOTO(err_filp, rc = -ENOENT);
1241 inode = file->f_dentry->d_parent->d_inode;
1242 /* We use i_op->unlink directly in filter_vfs_unlink() */
1243 if (!inode->i_op || !inode->i_op->create || !inode->i_op->unlink) {
1244 CERROR("%s: filesystem does not support create/unlink ops\n",
1246 GOTO(err_filp, rc = -EOPNOTSUPP);
1249 rc = filter_init_server_data(obd, file);
1251 CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
1254 /* open and create health check io file*/
1255 file = filp_open(HEALTH_CHECK, O_RDWR | O_CREAT, 0644);
1258 CERROR("OBD filter: cannot open/create %s rc = %d\n",
1260 GOTO(err_server_data, rc);
1262 filter->fo_health_check_filp = file;
1263 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1264 CERROR("%s is not a regular file!: mode = %o\n", HEALTH_CHECK,
1265 file->f_dentry->d_inode->i_mode);
1266 GOTO(err_health_check, rc = -ENOENT);
1268 rc = lvfs_check_io_health(obd, file);
1270 GOTO(err_health_check, rc);
1272 rc = filter_prep_groups(obd);
1274 GOTO(err_health_check, rc);
1276 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1281 if (filp_close(filter->fo_health_check_filp, 0))
1282 CERROR("can't close %s after error\n", HEALTH_CHECK);
1283 filter->fo_health_check_filp = NULL;
1285 target_recovery_fini(obd);
1286 filter_free_server_data(filter);
1288 if (filp_close(filter->fo_rcvd_filp, 0))
1289 CERROR("can't close %s after error\n", LAST_RCVD);
1290 filter->fo_rcvd_filp = NULL;
1294 /* cleanup the filter: write last used object id to status file */
1295 static void filter_post(struct obd_device *obd)
1297 struct lvfs_run_ctxt saved;
1298 struct filter_obd *filter = &obd->u.filter;
1301 /* XXX: filter_update_lastobjid used to call fsync_dev. It might be
1302 * best to start a transaction with h_sync, because we removed this
1305 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1306 rc = filter_update_server_data(obd, filter->fo_rcvd_filp,
1309 CERROR("error writing server data: rc = %d\n", rc);
1311 for (i = 1; i < filter->fo_group_count; i++) {
1312 rc = filter_update_last_objid(obd, i,
1313 (i == filter->fo_group_count - 1));
1315 CERROR("error writing group %d lastobjid: rc = %d\n",
1319 rc = filp_close(filter->fo_rcvd_filp, 0);
1320 filter->fo_rcvd_filp = NULL;
1322 CERROR("error closing %s: rc = %d\n", LAST_RCVD, rc);
1324 rc = filp_close(filter->fo_health_check_filp, 0);
1325 filter->fo_health_check_filp = NULL;
1327 CERROR("error closing %s: rc = %d\n", HEALTH_CHECK, rc);
1329 filter_cleanup_groups(obd);
1330 filter_free_server_data(filter);
1331 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1333 filter_free_capa_keys(filter);
1334 cleanup_capa_hash(filter->fo_capa_hash);
1337 static void filter_set_last_id(struct filter_obd *filter,
1338 obd_id id, obd_gr group)
1340 LASSERT(filter->fo_fsd != NULL);
1341 LASSERT(group <= filter->fo_group_count);
1343 spin_lock(&filter->fo_objidlock);
1344 filter->fo_last_objids[group] = id;
1345 spin_unlock(&filter->fo_objidlock);
1348 obd_id filter_last_id(struct filter_obd *filter, obd_gr group)
1351 LASSERT(filter->fo_fsd != NULL);
1352 LASSERT(group <= filter->fo_group_count);
1354 /* FIXME: object groups */
1355 spin_lock(&filter->fo_objidlock);
1356 id = filter->fo_last_objids[group];
1357 spin_unlock(&filter->fo_objidlock);
1362 static int filter_lock_dentry(struct obd_device *obd, struct dentry *dparent)
1364 LOCK_INODE_MUTEX(dparent->d_inode);
1368 /* We never dget the object parent, so DON'T dput it either */
1369 struct dentry *filter_parent(struct obd_device *obd, obd_gr group, obd_id objid)
1371 struct filter_obd *filter = &obd->u.filter;
1372 struct filter_subdirs *subdirs;
1373 LASSERT(group < filter->fo_group_count); /* FIXME: object groups */
1375 if (group > 0 || filter->fo_subdir_count == 0)
1376 return filter->fo_dentry_O_groups[group];
1378 subdirs = &filter->fo_dentry_O_sub[group];
1379 return subdirs->dentry[objid & (filter->fo_subdir_count - 1)];
1382 /* We never dget the object parent, so DON'T dput it either */
1383 struct dentry *filter_parent_lock(struct obd_device *obd, obd_gr group,
1386 unsigned long now = jiffies;
1387 struct dentry *dparent = filter_parent(obd, group, objid);
1390 if (IS_ERR(dparent))
1393 rc = filter_lock_dentry(obd, dparent);
1394 fsfilt_check_slow(obd, now, obd_timeout, "parent lock");
1395 return rc ? ERR_PTR(rc) : dparent;
1398 /* We never dget the object parent, so DON'T dput it either */
1399 static void filter_parent_unlock(struct dentry *dparent)
1401 UNLOCK_INODE_MUTEX(dparent->d_inode);
1404 /* How to get files, dentries, inodes from object id's.
1406 * If dir_dentry is passed, the caller has already locked the parent
1407 * appropriately for this operation (normally a write lock). If
1408 * dir_dentry is NULL, we do a read lock while we do the lookup to
1409 * avoid races with create/destroy and such changing the directory
1410 * internal to the filesystem code. */
1411 struct dentry *filter_fid2dentry(struct obd_device *obd,
1412 struct dentry *dir_dentry,
1413 obd_gr group, obd_id id)
1415 struct dentry *dparent = dir_dentry;
1416 struct dentry *dchild;
1421 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT) &&
1422 obd->u.filter.fo_destroys_in_progress == 0) {
1423 /* don't fail lookups for orphan recovery, it causes
1424 * later LBUGs when objects still exist during precreate */
1425 CDEBUG(D_INFO, "*** obd_fail_loc=%x ***\n",OBD_FAIL_OST_ENOENT);
1426 RETURN(ERR_PTR(-ENOENT));
1429 CERROR("fatal: invalid object id 0\n");
1430 RETURN(ERR_PTR(-ESTALE));
1433 len = sprintf(name, LPU64, id);
1434 if (dir_dentry == NULL) {
1435 dparent = filter_parent_lock(obd, group, id);
1436 if (IS_ERR(dparent)) {
1437 CERROR("%s: error getting object "LPU64":"LPU64
1438 " parent: rc %ld\n", obd->obd_name,
1439 id, group, PTR_ERR(dparent));
1443 CDEBUG(D_INODE, "looking up object O/%.*s/%s\n",
1444 dparent->d_name.len, dparent->d_name.name, name);
1445 dchild = /*ll_*/lookup_one_len(name, dparent, len);
1446 if (dir_dentry == NULL)
1447 filter_parent_unlock(dparent);
1448 if (IS_ERR(dchild)) {
1449 CERROR("%s: child lookup error %ld\n", obd->obd_name,
1454 if (dchild->d_inode != NULL && is_bad_inode(dchild->d_inode)) {
1455 CERROR("%s: got bad object "LPU64" inode %lu\n",
1456 obd->obd_name, id, dchild->d_inode->i_ino);
1458 RETURN(ERR_PTR(-ENOENT));
1461 CDEBUG(D_INODE, "got child objid %s: %p, count = %d\n",
1462 name, dchild, atomic_read(&dchild->d_count));
1464 LASSERT(atomic_read(&dchild->d_count) > 0);
1469 static int filter_prepare_destroy(struct obd_device *obd, obd_id objid,
1472 struct lustre_handle lockh;
1473 int flags = LDLM_AST_DISCARD_DATA, rc;
1474 struct ldlm_res_id res_id = { .name = { objid, 0, group, 0} };
1475 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
1478 /* Tell the clients that the object is gone now and that they should
1479 * throw away any cached pages. */
1480 rc = ldlm_cli_enqueue_local(obd->obd_namespace, &res_id, LDLM_EXTENT,
1481 &policy, LCK_PW, &flags, ldlm_blocking_ast,
1482 ldlm_completion_ast, NULL, NULL, 0, NULL,
1485 /* We only care about the side-effects, just drop the lock. */
1487 ldlm_lock_decref(&lockh, LCK_PW);
1492 /* This is vfs_unlink() without down(i_sem). If we call regular vfs_unlink()
1493 * we have 2.6 lock ordering issues with filter_commitrw_write() as it takes
1494 * i_sem before starting a handle, while filter_destroy() + vfs_unlink do the
1495 * reverse. Caller must take i_sem before starting the transaction and we
1496 * drop it here before the inode is removed from the dentry. bug 4180/6984 */
1497 int filter_vfs_unlink(struct inode *dir, struct dentry *dentry)
1502 /* don't need dir->i_zombie for 2.4, it is for rename/unlink of dir
1503 * itself we already hold dir->i_mutex for child create/unlink ops */
1504 LASSERT(dentry->d_inode != NULL);
1505 LASSERT(TRYLOCK_INODE_MUTEX(dir) == 0);
1506 LASSERT(TRYLOCK_INODE_MUTEX(dentry->d_inode) == 0);
1510 if (/*!dentry->d_inode ||*/dentry->d_parent->d_inode != dir)
1511 GOTO(out, rc = -ENOENT);
1513 rc = ll_permission(dir, MAY_WRITE | MAY_EXEC, NULL);
1518 GOTO(out, rc = -EPERM);
1520 /* check_sticky() */
1521 if ((dentry->d_inode->i_uid != current->fsuid && !capable(CAP_FOWNER))||
1522 IS_APPEND(dentry->d_inode) || IS_IMMUTABLE(dentry->d_inode))
1523 GOTO(out, rc = -EPERM);
1525 /* NOTE: This might need to go outside i_mutex, though it isn't clear if
1526 * that was done because of journal_start (which is already done
1527 * here) or some other ordering issue. */
1530 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1531 rc = security_inode_unlink(dir, dentry);
1536 rc = dir->i_op->unlink(dir, dentry);
1538 /* need to drop i_mutex before we lose inode reference */
1539 UNLOCK_INODE_MUTEX(dentry->d_inode);
1546 /* Caller must hold LCK_PW on parent and push us into kernel context.
1547 * Caller must hold child i_mutex, we drop it always.
1548 * Caller is also required to ensure that dchild->d_inode exists. */
1549 static int filter_destroy_internal(struct obd_device *obd, obd_id objid,
1550 obd_gr group, struct dentry *dparent,
1551 struct dentry *dchild)
1553 struct inode *inode = dchild->d_inode;
1556 if (inode->i_nlink != 1 || atomic_read(&inode->i_count) != 1) {
1557 CERROR("destroying objid %.*s ino %lu nlink %lu count %d\n",
1558 dchild->d_name.len, dchild->d_name.name, inode->i_ino,
1559 (unsigned long)inode->i_nlink,
1560 atomic_read(&inode->i_count));
1563 rc = filter_vfs_unlink(dparent->d_inode, dchild);
1565 CERROR("error unlinking objid %.*s: rc %d\n",
1566 dchild->d_name.len, dchild->d_name.name, rc);
1570 static int filter_intent_policy(struct ldlm_namespace *ns,
1571 struct ldlm_lock **lockp, void *req_cookie,
1572 ldlm_mode_t mode, int flags, void *data)
1574 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1575 struct ptlrpc_request *req = req_cookie;
1576 struct ldlm_lock *lock = *lockp, *l = NULL;
1577 struct ldlm_resource *res = lock->l_resource;
1578 ldlm_processing_policy policy;
1579 struct ost_lvb *res_lvb, *reply_lvb;
1580 struct ldlm_reply *rep;
1581 struct list_head *tmp;
1583 int rc, tmpflags = 0, only_liblustre = 0;
1584 int repsize[3] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
1585 [DLM_LOCKREPLY_OFF] = sizeof(*rep),
1586 [DLM_REPLY_REC_OFF] = sizeof(*reply_lvb) };
1589 policy = ldlm_get_processing_policy(res);
1590 LASSERT(policy != NULL);
1591 LASSERT(req != NULL);
1593 rc = lustre_pack_reply(req, 3, repsize, NULL);
1595 RETURN(req->rq_status = rc);
1597 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF, sizeof(*rep));
1598 LASSERT(rep != NULL);
1600 reply_lvb = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF,
1601 sizeof(*reply_lvb));
1602 LASSERT(reply_lvb != NULL);
1604 //fixup_handle_for_resent_req(req, lock, &lockh);
1606 /* If we grant any lock at all, it will be a whole-file read lock.
1607 * Call the extent policy function to see if our request can be
1608 * granted, or is blocked. */
1609 lock->l_policy_data.l_extent.start = 0;
1610 lock->l_policy_data.l_extent.end = OBD_OBJECT_EOF;
1611 lock->l_req_mode = LCK_PR;
1613 LASSERT(ns == res->lr_namespace);
1615 rc = policy(lock, &tmpflags, 0, &err, &rpc_list);
1616 check_res_locked(res);
1618 /* FIXME: we should change the policy function slightly, to not make
1619 * this list at all, since we just turn around and free it */
1620 while (!list_empty(&rpc_list)) {
1621 struct ldlm_lock *wlock =
1622 list_entry(rpc_list.next, struct ldlm_lock, l_cp_ast);
1623 LASSERT((lock->l_flags & LDLM_FL_AST_SENT) == 0);
1624 LASSERT(lock->l_flags & LDLM_FL_CP_REQD);
1625 lock->l_flags &= ~LDLM_FL_CP_REQD;
1626 list_del_init(&wlock->l_cp_ast);
1627 LDLM_LOCK_PUT(wlock);
1630 /* The lock met with no resistance; we're finished. */
1631 if (rc == LDLM_ITER_CONTINUE) {
1632 /* do not grant locks to the liblustre clients: they cannot
1633 * handle ASTs robustly. We need to do this while still
1634 * holding ns_lock to avoid the lock remaining on the res_link
1635 * list (and potentially being added to l_pending_list by an
1636 * AST) when we are going to drop this lock ASAP. */
1637 if (lock->l_export->exp_libclient ||
1638 OBD_FAIL_CHECK(OBD_FAIL_LDLM_GLIMPSE)) {
1639 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_GLIMPSE, 2);
1640 ldlm_resource_unlink_lock(lock);
1641 err = ELDLM_LOCK_ABORTED;
1643 err = ELDLM_LOCK_REPLACED;
1649 /* Do not grant any lock, but instead send GL callbacks. The extent
1650 * policy nicely created a list of all PW locks for us. We will choose
1651 * the highest of those which are larger than the size in the LVB, if
1652 * any, and perform a glimpse callback. */
1653 res_lvb = res->lr_lvb_data;
1654 LASSERT(res_lvb != NULL);
1655 *reply_lvb = *res_lvb;
1657 list_for_each(tmp, &res->lr_granted) {
1658 struct ldlm_lock *tmplock =
1659 list_entry(tmp, struct ldlm_lock, l_res_link);
1661 if (tmplock->l_granted_mode == LCK_PR)
1664 * ->ns_lock guarantees that no new locks are granted, and,
1665 * therefore, that res->lr_lvb_data cannot increase beyond the
1666 * end of already granted lock. As a result, it is safe to
1667 * check against "stale" reply_lvb->lvb_size value without
1670 if (tmplock->l_policy_data.l_extent.end <= reply_lvb->lvb_size)
1673 /* Don't send glimpse ASTs to liblustre clients. They aren't
1674 * listening for them, and they do entirely synchronous I/O
1676 if (tmplock->l_export == NULL ||
1677 tmplock->l_export->exp_libclient == 1) {
1683 l = LDLM_LOCK_GET(tmplock);
1687 if (l->l_policy_data.l_extent.start >
1688 tmplock->l_policy_data.l_extent.start)
1692 l = LDLM_LOCK_GET(tmplock);
1696 /* There were no PW locks beyond the size in the LVB; finished. */
1698 if (only_liblustre) {
1699 /* If we discovered a liblustre client with a PW lock,
1700 * however, the LVB may be out of date! The LVB is
1701 * updated only on glimpse (which we don't do for
1702 * liblustre clients) and cancel (which the client
1703 * obviously has not yet done). So if it has written
1704 * data but kept the lock, the LVB is stale and needs
1705 * to be updated from disk.
1707 * Of course, this will all disappear when we switch to
1708 * taking liblustre locks on the OST. */
1709 ldlm_res_lvbo_update(res, NULL, 0, 1);
1711 RETURN(ELDLM_LOCK_ABORTED);
1715 * This check is for lock taken in filter_prepare_destroy() that does
1716 * not have l_glimpse_ast set. So the logic is: if there is a lock
1717 * with no l_glimpse_ast set, this object is being destroyed already.
1719 * Hence, if you are grabbing DLM locks on the server, always set
1720 * non-NULL glimpse_ast (e.g., ldlm_request.c:ldlm_glimpse_ast()).
1722 if (l->l_glimpse_ast == NULL) {
1723 /* We are racing with unlink(); just return -ENOENT */
1724 rep->lock_policy_res1 = -ENOENT;
1728 LASSERTF(l->l_glimpse_ast != NULL, "l == %p", l);
1729 rc = l->l_glimpse_ast(l, NULL); /* this will update the LVB */
1730 /* Update the LVB from disk if the AST failed (this is a legal race) */
1732 * XXX nikita: situation when ldlm_server_glimpse_ast() failed before
1733 * sending ast is not handled. This can result in lost client writes.
1736 ldlm_res_lvbo_update(res, NULL, 0, 1);
1739 *reply_lvb = *res_lvb;
1745 RETURN(ELDLM_LOCK_ABORTED);
1749 * per-obd_device iobuf pool.
1751 * To avoid memory deadlocks in low-memory setups, amount of dynamic
1752 * allocations in write-path has to be minimized (see bug 5137).
1754 * Pages, niobuf_local's and niobuf_remote's are pre-allocated and attached to
1755 * OST threads (see ost_thread_{init,done}()).
1757 * "iobuf's" used by filter cannot be attached to OST thread, however, because
1758 * at the OST layer there are only (potentially) multiple obd_device of type
1759 * unknown at the time of OST thread creation.
1761 * Instead array of iobuf's is attached to struct filter_obd (->fo_iobuf_pool
1762 * field). This array has size OST_MAX_THREADS, so that each OST thread uses
1763 * it's very own iobuf.
1767 * filter_kiobuf_pool_init()
1769 * filter_kiobuf_pool_done()
1771 * filter_iobuf_get()
1773 * operate on this array. They are "generic" in a sense that they don't depend
1774 * on actual type of iobuf's (the latter depending on Linux kernel version).
1778 * destroy pool created by filter_iobuf_pool_init
1780 static void filter_iobuf_pool_done(struct filter_obd *filter)
1782 struct filter_iobuf **pool;
1787 pool = filter->fo_iobuf_pool;
1789 for (i = 0; i < filter->fo_iobuf_count; ++ i) {
1790 if (pool[i] != NULL)
1791 filter_free_iobuf(pool[i]);
1793 OBD_FREE(pool, filter->fo_iobuf_count * sizeof pool[0]);
1794 filter->fo_iobuf_pool = NULL;
1800 * pre-allocate pool of iobuf's to be used by filter_{prep,commit}rw_write().
1802 static int filter_iobuf_pool_init(struct filter_obd *filter)
1809 OBD_ALLOC_GFP(filter->fo_iobuf_pool, OSS_THREADS_MAX * sizeof(*pool),
1811 if (filter->fo_iobuf_pool == NULL)
1814 filter->fo_iobuf_count = OSS_THREADS_MAX;
1819 /* Return iobuf allocated for @thread_id. We don't know in advance how
1820 * many threads there will be so we allocate a large empty array and only
1821 * fill in those slots that are actually in use.
1822 * If we haven't allocated a pool entry for this thread before, do so now. */
1823 void *filter_iobuf_get(struct filter_obd *filter, struct obd_trans_info *oti)
1825 int thread_id = oti ? oti->oti_thread_id : -1;
1826 struct filter_iobuf *pool = NULL;
1827 struct filter_iobuf **pool_place = NULL;
1829 if (thread_id >= 0) {
1830 LASSERT(thread_id < filter->fo_iobuf_count);
1831 pool = *(pool_place = &filter->fo_iobuf_pool[thread_id]);
1834 if (unlikely(pool == NULL)) {
1835 pool = filter_alloc_iobuf(filter, OBD_BRW_WRITE,
1836 PTLRPC_MAX_BRW_PAGES);
1837 if (pool_place != NULL)
1844 /* mount the file system (secretly). lustre_cfg parameters are:
1847 * 3 = flags: failover=f, failout=n
1850 int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
1853 struct filter_obd *filter = &obd->u.filter;
1854 struct vfsmount *mnt;
1855 struct lustre_mount_info *lmi;
1856 struct obd_uuid uuid;
1863 if (lcfg->lcfg_bufcount < 3 ||
1864 LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
1865 LUSTRE_CFG_BUFLEN(lcfg, 2) < 1)
1868 lmi = server_get_mount(obd->obd_name);
1870 /* We already mounted in lustre_fill_super.
1871 lcfg bufs 1, 2, 4 (device, fstype, mount opts) are ignored.*/
1872 struct lustre_sb_info *lsi = s2lsi(lmi->lmi_sb);
1874 obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
1876 /* old path - used by lctl */
1877 CERROR("Using old MDS mount method\n");
1878 mnt = ll_kern_mount(lustre_cfg_string(lcfg, 2),
1879 MS_NOATIME|MS_NODIRATIME,
1880 lustre_cfg_string(lcfg, 1), option);
1883 LCONSOLE_ERROR_MSG(0x135, "Can't mount disk %s (%d)\n",
1884 lustre_cfg_string(lcfg, 1), rc);
1888 obd->obd_fsops = fsfilt_get_ops(lustre_cfg_string(lcfg, 2));
1890 if (IS_ERR(obd->obd_fsops))
1891 GOTO(err_mntput, rc = PTR_ERR(obd->obd_fsops));
1893 rc = filter_iobuf_pool_init(filter);
1897 LASSERT(!lvfs_check_rdonly(lvfs_sbdev(mnt->mnt_sb)));
1899 /* failover is the default */
1900 obd->obd_replayable = 1;
1902 if (lcfg->lcfg_bufcount > 3 && LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
1903 str = lustre_cfg_string(lcfg, 3);
1904 if (strchr(str, 'n')) {
1905 CWARN("%s: recovery disabled\n", obd->obd_name);
1906 obd->obd_replayable = 0;
1910 filter->fo_vfsmnt = mnt;
1911 obd->u.obt.obt_sb = mnt->mnt_sb;
1912 filter->fo_fstype = mnt->mnt_sb->s_type->name;
1913 CDEBUG(D_SUPER, "%s: mnt = %p\n", filter->fo_fstype, mnt);
1915 fsfilt_setup(obd, obd->u.obt.obt_sb);
1917 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
1918 obd->obd_lvfs_ctxt.pwdmnt = mnt;
1919 obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
1920 obd->obd_lvfs_ctxt.fs = get_ds();
1921 obd->obd_lvfs_ctxt.cb_ops = filter_lvfs_ops;
1923 sema_init(&filter->fo_init_lock, 1);
1924 filter->fo_committed_group = 0;
1926 rc = filter_prep(obd);
1930 filter->fo_destroys_in_progress = 0;
1931 for (i = 0; i < 32; i++)
1932 sema_init(&filter->fo_create_locks[i], 1);
1934 spin_lock_init(&filter->fo_translock);
1935 spin_lock_init(&filter->fo_objidlock);
1936 INIT_LIST_HEAD(&filter->fo_export_list);
1937 sema_init(&filter->fo_alloc_lock, 1);
1938 init_brw_stats(&filter->fo_filter_stats);
1939 filter->fo_readcache_max_filesize = FILTER_MAX_CACHE_SIZE;
1940 filter->fo_fmd_max_num = FILTER_FMD_MAX_NUM_DEFAULT;
1941 filter->fo_fmd_max_age = FILTER_FMD_MAX_AGE_DEFAULT;
1943 INIT_LIST_HEAD(&filter->fo_llog_list);
1944 spin_lock_init(&filter->fo_llog_list_lock);
1946 filter->fo_fl_oss_capa = 0;
1947 INIT_LIST_HEAD(&filter->fo_capa_keys);
1948 filter->fo_capa_hash = init_capa_hash();
1949 if (filter->fo_capa_hash == NULL)
1950 GOTO(err_ops, rc = -ENOMEM);
1952 sprintf(ns_name, "filter-%s", obd->obd_uuid.uuid);
1953 obd->obd_namespace = ldlm_namespace_new(ns_name, LDLM_NAMESPACE_SERVER,
1954 LDLM_NAMESPACE_GREEDY);
1955 if (obd->obd_namespace == NULL)
1956 GOTO(err_post, rc = -ENOMEM);
1957 obd->obd_namespace->ns_lvbp = obd;
1958 obd->obd_namespace->ns_lvbo = &filter_lvbo;
1959 ldlm_register_intent(obd->obd_namespace, filter_intent_policy);
1961 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1962 "filter_ldlm_cb_client", &obd->obd_ldlm_client);
1964 rc = llog_cat_initialize(obd, NULL, 1, NULL);
1966 CERROR("failed to setup llogging subsystems\n");
1970 rc = lquota_setup(filter_quota_interface_ref, obd);
1974 uuid_ptr = fsfilt_uuid(obd, obd->u.obt.obt_sb);
1975 if (uuid_ptr != NULL) {
1976 class_uuid_unparse(uuid_ptr, &uuid);
1982 label = fsfilt_get_label(obd, obd->u.obt.obt_sb);
1984 if (obd->obd_recovering) {
1985 LCONSOLE_WARN("OST %s now serving %s (%s%s%s), but will be in "
1986 "recovery until %d %s reconnect, or if no clients"
1987 " reconnect for %d:%.02d; during that time new "
1988 "clients will not be allowed to connect. "
1989 "Recovery progress can be monitored by watching "
1990 "/proc/fs/lustre/obdfilter/%s/recovery_status.\n",
1991 obd->obd_name, lustre_cfg_string(lcfg, 1),
1992 label ?: "", label ? "/" : "", str,
1993 obd->obd_max_recoverable_clients,
1994 (obd->obd_max_recoverable_clients == 1)
1995 ? "client" : "clients",
1996 (int)(OBD_RECOVERY_TIMEOUT) / 60,
1997 (int)(OBD_RECOVERY_TIMEOUT) % 60,
2000 LCONSOLE_INFO("OST %s now serving %s (%s%s%s) with recovery "
2001 "%s\n", obd->obd_name, lustre_cfg_string(lcfg, 1),
2002 label ?: "", label ? "/" : "", str,
2003 obd->obd_replayable ? "enabled" : "disabled");
2011 fsfilt_put_ops(obd->obd_fsops);
2012 filter_iobuf_pool_done(filter);
2014 server_put_mount(obd->obd_name, mnt);
2015 obd->u.obt.obt_sb = 0;
2019 static int filter_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
2021 struct lprocfs_static_vars lvars;
2025 CLASSERT(offsetof(struct obd_device, u.obt) ==
2026 offsetof(struct obd_device, u.filter.fo_obt));
2028 if (!LUSTRE_CFG_BUFLEN(lcfg, 1) || !LUSTRE_CFG_BUFLEN(lcfg, 2))
2031 /* 2.6.9 selinux wants a full option page for do_kern_mount (bug6471) */
2032 page = get_zeroed_page(GFP_KERNEL);
2036 /* lprocfs must be setup before the filter so state can be safely added
2037 * to /proc incrementally as the filter is setup */
2038 lprocfs_init_vars(filter, &lvars);
2039 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0 &&
2040 lprocfs_alloc_obd_stats(obd, LPROC_FILTER_LAST) == 0) {
2041 /* Init obdfilter private stats here */
2042 lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_READ_BYTES,
2043 LPROCFS_CNTR_AVGMINMAX,
2044 "read_bytes", "bytes");
2045 lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_WRITE_BYTES,
2046 LPROCFS_CNTR_AVGMINMAX,
2047 "write_bytes", "bytes");
2049 lproc_filter_attach_seqstat(obd);
2050 obd->obd_proc_exports = proc_mkdir("exports",
2051 obd->obd_proc_entry);
2054 memcpy((void *)page, lustre_cfg_buf(lcfg, 4),
2055 LUSTRE_CFG_BUFLEN(lcfg, 4));
2056 rc = filter_common_setup(obd, lcfg, (void *)page);
2060 lprocfs_obd_cleanup(obd);
2061 lprocfs_free_obd_stats(obd);
2067 static struct llog_operations filter_mds_ost_repl_logops /* initialized below*/;
2068 static struct llog_operations filter_size_orig_logops = {
2069 lop_setup: llog_obd_origin_setup,
2070 lop_cleanup: llog_obd_origin_cleanup,
2071 lop_add: llog_obd_origin_add
2074 static int filter_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
2075 struct obd_device *tgt, int count,
2076 struct llog_catid *catid,
2077 struct obd_uuid *uuid)
2079 struct llog_ctxt *ctxt;
2083 filter_mds_ost_repl_logops = llog_client_ops;
2084 filter_mds_ost_repl_logops.lop_cancel = llog_obd_repl_cancel;
2085 filter_mds_ost_repl_logops.lop_connect = llog_repl_connect;
2086 filter_mds_ost_repl_logops.lop_sync = llog_obd_repl_sync;
2088 rc = llog_setup(obd, llogs, LLOG_MDS_OST_REPL_CTXT, tgt, 0, NULL,
2089 &filter_mds_ost_repl_logops);
2093 /* FIXME - assign unlink_cb for filter's recovery */
2095 ctxt = llog_get_context(obd, LLOG_MDS_OST_REPL_CTXT);
2097 ctxt = llog_get_context_from_llogs(llogs, LLOG_MDS_OST_REPL_CTXT);
2099 LASSERT(ctxt != NULL);
2100 ctxt->llog_proc_cb = filter_recov_log_mds_ost_cb;
2102 rc = llog_setup(obd, llogs, LLOG_SIZE_ORIG_CTXT, tgt, 0, NULL,
2103 &filter_size_orig_logops);
2107 static int filter_group_llog_cleanup(struct llog_ctxt *ctxt)
2112 if (CTXTP(ctxt, cleanup))
2113 rc = CTXTP(ctxt, cleanup)(ctxt);
2116 class_export_put(ctxt->loc_exp);
2117 OBD_FREE(ctxt, sizeof(*ctxt));
2122 static int filter_group_llog_finish(struct obd_llogs *llogs)
2124 struct llog_ctxt *ctxt;
2125 int rc = 0, rc2 = 0;
2128 ctxt = llog_get_context_from_llogs(llogs, LLOG_MDS_OST_REPL_CTXT);
2130 rc = filter_group_llog_cleanup(ctxt);
2132 ctxt = llog_get_context_from_llogs(llogs, LLOG_SIZE_ORIG_CTXT);
2134 rc2 = filter_group_llog_cleanup(ctxt);
2141 static int filter_llog_finish(struct obd_device *obd, int count)
2143 struct llog_ctxt *ctxt;
2144 int rc = 0, rc2 = 0;
2147 ctxt = llog_get_context(obd, LLOG_MDS_OST_REPL_CTXT);
2149 rc = llog_cleanup(ctxt);
2151 ctxt = llog_get_context(obd, LLOG_SIZE_ORIG_CTXT);
2153 rc2 = llog_cleanup(ctxt);
2160 struct obd_llogs *filter_grab_llog_for_group(struct obd_device *obd, int group,
2161 struct obd_export *export)
2163 struct filter_group_llog *fglog, *nlog;
2164 struct filter_obd *filter;
2165 struct llog_ctxt *ctxt;
2166 struct list_head *cur;
2169 filter = &obd->u.filter;
2171 spin_lock(&filter->fo_llog_list_lock);
2172 list_for_each(cur, &filter->fo_llog_list) {
2173 fglog = list_entry(cur, struct filter_group_llog, list);
2174 if (fglog->group == group) {
2175 if (!(fglog->exp == NULL || fglog->exp == export || export == NULL))
2176 CWARN("%s: export for group %d changes: 0x%p -> 0x%p\n",
2177 obd->obd_name, group, fglog->exp, export);
2178 spin_unlock(&filter->fo_llog_list_lock);
2182 spin_unlock(&filter->fo_llog_list_lock);
2187 OBD_ALLOC_PTR(fglog);
2190 fglog->group = group;
2192 OBD_ALLOC_PTR(fglog->llogs);
2193 if (fglog->llogs == NULL) {
2194 OBD_FREE_PTR(fglog);
2198 spin_lock(&filter->fo_llog_list_lock);
2199 list_for_each(cur, &filter->fo_llog_list) {
2200 nlog = list_entry(cur, struct filter_group_llog, list);
2201 LASSERT(nlog->group != group);
2203 list_add(&fglog->list, &filter->fo_llog_list);
2204 spin_unlock(&filter->fo_llog_list_lock);
2206 rc = llog_cat_initialize(obd, fglog->llogs, 1, NULL);
2208 OBD_FREE_PTR(fglog->llogs);
2209 OBD_FREE_PTR(fglog);
2215 fglog->exp = export;
2216 ctxt = llog_get_context_from_llogs(fglog->llogs,
2217 LLOG_MDS_OST_REPL_CTXT);
2218 LASSERT(ctxt != NULL);
2220 llog_receptor_accept(ctxt, export->exp_imp_reverse);
2222 CDEBUG(D_OTHER, "%s: new llog 0x%p for group %u\n",
2223 obd->obd_name, fglog->llogs, group);
2225 RETURN(fglog->llogs);
2228 static int filter_llog_connect(struct obd_export *exp,
2229 struct llogd_conn_body *body)
2231 struct obd_device *obd = exp->exp_obd;
2232 struct llog_ctxt *ctxt;
2233 struct obd_llogs *llog;
2237 CDEBUG(D_OTHER, "handle connect for %s: %u/%u/%u\n", obd->obd_name,
2238 (unsigned) body->lgdc_logid.lgl_ogr,
2239 (unsigned) body->lgdc_logid.lgl_oid,
2240 (unsigned) body->lgdc_logid.lgl_ogen);
2242 llog = filter_grab_llog_for_group(obd, body->lgdc_logid.lgl_ogr, exp);
2243 LASSERT(llog != NULL);
2244 ctxt = llog_get_context_from_llogs(llog, body->lgdc_ctxt_idx);
2245 LASSERTF(ctxt != NULL, "ctxt is not null, ctxt idx %d \n",
2246 body->lgdc_ctxt_idx);
2247 rc = llog_connect(ctxt, 1, &body->lgdc_logid,
2248 &body->lgdc_gen, NULL);
2250 CERROR("failed to connect rc %d idx %d\n", rc,
2251 body->lgdc_ctxt_idx);
2256 static int filter_llog_preclean (struct obd_device *obd)
2258 struct filter_group_llog *log;
2259 struct filter_obd *filter;
2263 filter = &obd->u.filter;
2264 spin_lock(&filter->fo_llog_list_lock);
2265 while (!list_empty(&filter->fo_llog_list)) {
2266 log = list_entry(filter->fo_llog_list.next,
2267 struct filter_group_llog, list);
2268 list_del(&log->list);
2269 spin_unlock(&filter->fo_llog_list_lock);
2271 rc = filter_group_llog_finish(log->llogs);
2273 CERROR("failed to cleanup llogging subsystem for %u\n",
2275 OBD_FREE_PTR(log->llogs);
2277 spin_lock(&filter->fo_llog_list_lock);
2279 spin_unlock(&filter->fo_llog_list_lock);
2281 rc = obd_llog_finish(obd, 0);
2283 CERROR("failed to cleanup llogging subsystem\n");
2288 static int filter_precleanup(struct obd_device *obd,
2289 enum obd_cleanup_stage stage)
2295 case OBD_CLEANUP_EARLY:
2297 case OBD_CLEANUP_EXPORTS:
2298 target_cleanup_recovery(obd);
2300 case OBD_CLEANUP_SELF_EXP:
2301 rc = filter_llog_preclean(obd);
2303 case OBD_CLEANUP_OBD:
2309 static int filter_cleanup(struct obd_device *obd)
2311 struct filter_obd *filter = &obd->u.filter;
2315 LCONSOLE_WARN("%s: shutting down for failover; client state "
2316 "will be preserved.\n", obd->obd_name);
2318 if (!list_empty(&obd->obd_exports)) {
2319 CERROR("%s: still has clients!\n", obd->obd_name);
2320 class_disconnect_exports(obd);
2321 if (!list_empty(&obd->obd_exports)) {
2322 CERROR("still has exports after forced cleanup?\n");
2327 lprocfs_obd_cleanup(obd);
2328 lprocfs_free_obd_stats(obd);
2329 lquota_cleanup(filter_quota_interface_ref, obd);
2331 /* Stop recovery before namespace cleanup. */
2332 target_stop_recovery_thread(obd);
2333 target_cleanup_recovery(obd);
2335 ldlm_namespace_free(obd->obd_namespace, obd->obd_force);
2337 if (obd->u.obt.obt_sb == NULL)
2342 shrink_dcache_parent(obd->u.obt.obt_sb->s_root);
2344 LL_DQUOT_OFF(obd->u.obt.obt_sb);
2346 server_put_mount(obd->obd_name, filter->fo_vfsmnt);
2347 obd->u.obt.obt_sb = NULL;
2349 fsfilt_put_ops(obd->obd_fsops);
2351 filter_iobuf_pool_done(filter);
2353 LCONSOLE_INFO("OST %s has stopped.\n", obd->obd_name);
2358 static int filter_connect_internal(struct obd_export *exp,
2359 struct obd_connect_data *data)
2364 CDEBUG(D_RPCTRACE, "%s: cli %s/%p ocd_connect_flags: "LPX64
2365 " ocd_version: %x ocd_grant: %d ocd_index: %u\n",
2366 exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
2367 data->ocd_connect_flags, data->ocd_version,
2368 data->ocd_grant, data->ocd_index);
2370 data->ocd_connect_flags &= OST_CONNECT_SUPPORTED;
2371 exp->exp_connect_flags = data->ocd_connect_flags;
2372 data->ocd_version = LUSTRE_VERSION_CODE;
2374 if (exp->exp_connect_flags & OBD_CONNECT_GRANT) {
2375 struct filter_export_data *fed = &exp->exp_filter_data;
2376 obd_size left, want;
2378 spin_lock(&exp->exp_obd->obd_osfs_lock);
2379 left = filter_grant_space_left(exp);
2380 want = data->ocd_grant;
2381 filter_grant(exp, fed->fed_grant, want, left);
2382 data->ocd_grant = fed->fed_grant;
2383 spin_unlock(&exp->exp_obd->obd_osfs_lock);
2385 CDEBUG(D_CACHE, "%s: cli %s/%p ocd_grant: %d want: "
2386 LPU64" left: "LPU64"\n", exp->exp_obd->obd_name,
2387 exp->exp_client_uuid.uuid, exp,
2388 data->ocd_grant, want, left);
2391 if (data->ocd_connect_flags & OBD_CONNECT_INDEX) {
2392 struct filter_obd *filter = &exp->exp_obd->u.filter;
2393 struct lr_server_data *lsd = filter->fo_fsd;
2394 int index = le32_to_cpu(lsd->lsd_ost_index);
2396 if (!(lsd->lsd_feature_compat &
2397 cpu_to_le32(OBD_COMPAT_OST))) {
2398 /* this will only happen on the first connect */
2399 lsd->lsd_ost_index = cpu_to_le32(data->ocd_index);
2400 lsd->lsd_feature_compat |= cpu_to_le32(OBD_COMPAT_OST);
2401 filter_update_server_data(exp->exp_obd,
2402 filter->fo_rcvd_filp, lsd, 1);
2403 } else if (index != data->ocd_index) {
2404 LCONSOLE_ERROR_MSG(0x136, "Connection from %s to index"
2405 " %u doesn't match actual OST index"
2406 " %u in last_rcvd file, bad "
2408 obd_export_nid2str(exp), index,
2414 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_SIZE)) {
2415 data->ocd_brw_size = 65536;
2416 } else if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
2417 data->ocd_brw_size = min(data->ocd_brw_size,
2418 (__u32)(PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT));
2419 LASSERT(data->ocd_brw_size);
2422 /* FIXME: Do the same with the MDS UUID and fsd_peeruuid.
2423 * FIXME: We don't strictly need the COMPAT flag for that,
2424 * FIXME: as fsd_peeruuid[0] will tell us if that is set.
2425 * FIXME: We needed it for the index, as index 0 is valid. */
2430 static int filter_reconnect(struct obd_export *exp, struct obd_device *obd,
2431 struct obd_uuid *cluuid,
2432 struct obd_connect_data *data)
2437 if (exp == NULL || obd == NULL || cluuid == NULL)
2440 rc = filter_connect_internal(exp, data);
2445 /* nearly identical to mds_connect */
2446 static int filter_connect(const struct lu_env *env,
2447 struct lustre_handle *conn, struct obd_device *obd,
2448 struct obd_uuid *cluuid,
2449 struct obd_connect_data *data)
2451 struct lvfs_run_ctxt saved;
2452 struct obd_export *exp;
2453 struct filter_export_data *fed;
2454 struct filter_client_data *fcd = NULL;
2459 if (conn == NULL || obd == NULL || cluuid == NULL)
2462 rc = class_connect(conn, obd, cluuid);
2465 exp = class_conn2export(conn);
2466 LASSERT(exp != NULL);
2468 fed = &exp->exp_filter_data;
2470 rc = filter_connect_internal(exp, data);
2474 filter_export_stats_init(obd, exp);
2475 group = data->ocd_group;
2476 if (obd->obd_replayable) {
2477 OBD_ALLOC(fcd, sizeof(*fcd));
2479 CERROR("filter: out of memory for client data\n");
2480 GOTO(cleanup, rc = -ENOMEM);
2483 memcpy(fcd->fcd_uuid, cluuid, sizeof(fcd->fcd_uuid));
2485 fed->fed_fcd->fcd_group = group;
2486 rc = filter_client_add(obd, exp, -1);
2490 CWARN("%s: Received MDS connection ("LPX64"); group %d\n",
2491 obd->obd_name, exp->exp_handle.h_cookie, group);
2495 if (fed->fed_group != 0 && fed->fed_group != group) {
2496 CERROR("!!! This export (nid %s) used object group %d "
2497 "earlier; now it's trying to use group %d! This could "
2498 "be a bug in the MDS. Tell CFS.\n",
2499 obd_export_nid2str(exp), fed->fed_group, group);
2500 GOTO(cleanup, rc = -EPROTO);
2502 fed->fed_group = group;
2504 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2505 rc = filter_read_groups(obd, group, 1);
2506 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2508 CERROR("can't read group %u\n", group);
2517 OBD_FREE(fcd, sizeof(*fcd));
2518 fed->fed_fcd = NULL;
2520 class_disconnect(exp);
2522 class_export_put(exp);
2528 /* Do extra sanity checks for grant accounting. We do this at connect,
2529 * disconnect, and statfs RPC time, so it shouldn't be too bad. We can
2530 * always get rid of it or turn it off when we know accounting is good. */
2531 static void filter_grant_sanity_check(struct obd_device *obd, const char *func)
2533 struct filter_export_data *fed;
2534 struct obd_export *exp;
2535 obd_size maxsize = obd->obd_osfs.os_blocks * obd->obd_osfs.os_bsize;
2536 obd_size tot_dirty = 0, tot_pending = 0, tot_granted = 0;
2537 obd_size fo_tot_dirty, fo_tot_pending, fo_tot_granted;
2539 if (list_empty(&obd->obd_exports))
2542 /* We don't want to do this for large machines that do lots of
2543 mounts or unmounts. It burns... */
2544 if (obd->obd_num_exports > 100)
2547 spin_lock(&obd->obd_osfs_lock);
2548 spin_lock(&obd->obd_dev_lock);
2549 list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
2551 fed = &exp->exp_filter_data;
2552 if (fed->fed_grant < 0 || fed->fed_pending < 0 ||
2555 if (maxsize > 0) { /* we may not have done a statfs yet */
2556 LASSERTF(fed->fed_grant + fed->fed_pending <= maxsize,
2557 "%s: cli %s/%p %ld+%ld > "LPU64"\n", func,
2558 exp->exp_client_uuid.uuid, exp,
2559 fed->fed_grant, fed->fed_pending, maxsize);
2560 LASSERTF(fed->fed_dirty <= maxsize,
2561 "%s: cli %s/%p %ld > "LPU64"\n", func,
2562 exp->exp_client_uuid.uuid, exp,
2563 fed->fed_dirty, maxsize);
2566 CERROR("%s: cli %s/%p dirty %ld pend %ld grant %ld\n",
2567 obd->obd_name, exp->exp_client_uuid.uuid, exp,
2568 fed->fed_dirty, fed->fed_pending,fed->fed_grant);
2570 CDEBUG(D_CACHE, "%s: cli %s/%p dirty %ld pend %ld grant %ld\n",
2571 obd->obd_name, exp->exp_client_uuid.uuid, exp,
2572 fed->fed_dirty, fed->fed_pending,fed->fed_grant);
2573 tot_granted += fed->fed_grant + fed->fed_pending;
2574 tot_pending += fed->fed_pending;
2575 tot_dirty += fed->fed_dirty;
2577 fo_tot_granted = obd->u.filter.fo_tot_granted;
2578 fo_tot_pending = obd->u.filter.fo_tot_pending;
2579 fo_tot_dirty = obd->u.filter.fo_tot_dirty;
2580 spin_unlock(&obd->obd_dev_lock);
2581 spin_unlock(&obd->obd_osfs_lock);
2583 /* Do these assertions outside the spinlocks so we don't kill system */
2584 if (tot_granted != fo_tot_granted)
2585 CERROR("%s: tot_granted "LPU64" != fo_tot_granted "LPU64"\n",
2586 func, tot_granted, fo_tot_granted);
2587 if (tot_pending != fo_tot_pending)
2588 CERROR("%s: tot_pending "LPU64" != fo_tot_pending "LPU64"\n",
2589 func, tot_pending, fo_tot_pending);
2590 if (tot_dirty != fo_tot_dirty)
2591 CERROR("%s: tot_dirty "LPU64" != fo_tot_dirty "LPU64"\n",
2592 func, tot_dirty, fo_tot_dirty);
2593 if (tot_pending > tot_granted)
2594 CERROR("%s: tot_pending "LPU64" > tot_granted "LPU64"\n",
2595 func, tot_pending, tot_granted);
2596 if (tot_granted > maxsize)
2597 CERROR("%s: tot_granted "LPU64" > maxsize "LPU64"\n",
2598 func, tot_granted, maxsize);
2599 if (tot_dirty > maxsize)
2600 CERROR("%s: tot_dirty "LPU64" > maxsize "LPU64"\n",
2601 func, tot_dirty, maxsize);
2604 /* Remove this client from the grant accounting totals. We also remove
2605 * the export from the obd device under the osfs and dev locks to ensure
2606 * that the filter_grant_sanity_check() calculations are always valid.
2607 * The client should do something similar when it invalidates its import. */
2608 static void filter_grant_discard(struct obd_export *exp)
2610 struct obd_device *obd = exp->exp_obd;
2611 struct filter_obd *filter = &obd->u.filter;
2612 struct filter_export_data *fed = &exp->exp_filter_data;
2614 spin_lock(&obd->obd_osfs_lock);
2615 spin_lock(&obd->obd_dev_lock);
2616 list_del_init(&exp->exp_obd_chain);
2617 spin_unlock(&obd->obd_dev_lock);
2619 LASSERTF(filter->fo_tot_granted >= fed->fed_grant,
2620 "%s: tot_granted "LPU64" cli %s/%p fed_grant %ld\n",
2621 obd->obd_name, filter->fo_tot_granted,
2622 exp->exp_client_uuid.uuid, exp, fed->fed_grant);
2623 filter->fo_tot_granted -= fed->fed_grant;
2624 LASSERTF(filter->fo_tot_pending >= fed->fed_pending,
2625 "%s: tot_pending "LPU64" cli %s/%p fed_pending %ld\n",
2626 obd->obd_name, filter->fo_tot_pending,
2627 exp->exp_client_uuid.uuid, exp, fed->fed_pending);
2628 /* fo_tot_pending is handled in filter_grant_commit as bulk finishes */
2629 LASSERTF(filter->fo_tot_dirty >= fed->fed_dirty,
2630 "%s: tot_dirty "LPU64" cli %s/%p fed_dirty %ld\n",
2631 obd->obd_name, filter->fo_tot_dirty,
2632 exp->exp_client_uuid.uuid, exp, fed->fed_dirty);
2633 filter->fo_tot_dirty -= fed->fed_dirty;
2637 spin_unlock(&obd->obd_osfs_lock);
2640 static int filter_destroy_export(struct obd_export *exp)
2644 if (exp->exp_filter_data.fed_pending)
2645 CERROR("%s: cli %s/%p has %lu pending on destroyed export\n",
2646 exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
2647 exp, exp->exp_filter_data.fed_pending);
2649 target_destroy_export(exp);
2651 if (obd_uuid_equals(&exp->exp_client_uuid, &exp->exp_obd->obd_uuid))
2654 lprocfs_exp_cleanup(exp);
2656 if (exp->exp_obd->obd_replayable)
2657 filter_client_free(exp);
2659 fsfilt_sync(exp->exp_obd, exp->exp_obd->u.obt.obt_sb);
2661 filter_grant_discard(exp);
2662 filter_fmd_cleanup(exp);
2664 if (!(exp->exp_flags & OBD_OPT_FORCE))
2665 filter_grant_sanity_check(exp->exp_obd, __FUNCTION__);
2670 static void filter_sync_llogs(struct obd_device *obd, struct obd_export *dexp)
2672 struct filter_group_llog *fglog, *nlog;
2673 struct filter_obd *filter;
2674 int worked = 0, group;
2675 struct llog_ctxt *ctxt;
2678 filter = &obd->u.filter;
2680 /* we can't sync log holding spinlock. also, we do not want to get
2681 * into livelock. so we do following: loop over MDS's exports in
2682 * group order and skip already synced llogs -bzzz */
2684 /* look for group with min. number, but > worked */
2687 spin_lock(&filter->fo_llog_list_lock);
2688 list_for_each_entry(nlog, &filter->fo_llog_list, list) {
2689 if (nlog->group <= worked) {
2690 /* this group is already synced */
2693 if (group < nlog->group) {
2694 /* we have group with smaller number to sync */
2697 /* store current minimal group */
2699 group = nlog->group;
2701 spin_unlock(&filter->fo_llog_list_lock);
2706 worked = fglog->group;
2707 if (fglog->exp && (dexp == fglog->exp || dexp == NULL)) {
2708 ctxt = llog_get_context_from_llogs(fglog->llogs,
2709 LLOG_MDS_OST_REPL_CTXT);
2710 LASSERT(ctxt != NULL);
2711 llog_sync(ctxt, fglog->exp);
2713 } while (fglog != NULL);
2716 /* also incredibly similar to mds_disconnect */
2717 static int filter_disconnect(struct obd_export *exp)
2719 struct obd_device *obd = exp->exp_obd;
2724 class_export_get(exp);
2726 if (!(exp->exp_flags & OBD_OPT_FORCE))
2727 filter_grant_sanity_check(obd, __FUNCTION__);
2728 filter_grant_discard(exp);
2730 /* Disconnect early so that clients can't keep using export */
2731 rc = class_disconnect(exp);
2732 if (exp->exp_obd->obd_namespace != NULL)
2733 ldlm_cancel_locks_for_export(exp);
2735 fsfilt_sync(obd, obd->u.obt.obt_sb);
2737 /* flush any remaining cancel messages out to the target */
2738 filter_sync_llogs(obd, exp);
2739 class_export_put(exp);
2743 /* reverse import is changed, sync all cancels */
2744 static void filter_revimp_update(struct obd_export *exp)
2749 class_export_get(exp);
2751 /* flush any remaining cancel messages out to the target */
2752 filter_sync_llogs(exp->exp_obd, exp);
2753 class_export_put(exp);
2757 static int filter_ping(struct obd_export *exp)
2759 filter_fmd_expire(exp);
2764 struct dentry *__filter_oa2dentry(struct obd_device *obd, struct obdo *oa,
2765 const char *what, int quiet)
2767 struct dentry *dchild = NULL;
2770 if (oa->o_valid & OBD_MD_FLGROUP)
2773 dchild = filter_fid2dentry(obd, NULL, group, oa->o_id);
2775 if (IS_ERR(dchild)) {
2776 CERROR("%s error looking up object: "LPU64"\n",
2781 if (dchild->d_inode == NULL) {
2783 CERROR("%s: %s on non-existent object: "LPU64"\n",
2784 obd->obd_name, what, oa->o_id);
2786 RETURN(ERR_PTR(-ENOENT));
2792 static int filter_getattr(struct obd_export *exp, struct obd_info *oinfo)
2794 struct dentry *dentry = NULL;
2795 struct obd_device *obd;
2799 rc = filter_auth_capa(exp, NULL, oinfo_mdsno(oinfo),
2800 oinfo_capa(oinfo), CAPA_OPC_META_READ);
2804 obd = class_exp2obd(exp);
2806 CDEBUG(D_IOCTL, "invalid client export %p\n", exp);
2810 dentry = filter_oa2dentry(obd, oinfo->oi_oa);
2812 RETURN(PTR_ERR(dentry));
2814 /* Limit the valid bits in the return data to what we actually use */
2815 oinfo->oi_oa->o_valid = OBD_MD_FLID;
2816 obdo_from_inode(oinfo->oi_oa, dentry->d_inode, FILTER_VALID_FLAGS);
2822 /* this should be enabled/disabled in condition to enabled/disabled large
2823 * inodes (fast EAs) in backing store FS. */
2824 int filter_update_fidea(struct obd_export *exp, struct inode *inode,
2825 void *handle, struct obdo *oa)
2827 struct obd_device *obd = exp->exp_obd;
2831 if (oa->o_valid & OBD_MD_FLFID) {
2832 struct filter_fid ff;
2834 if (!(oa->o_valid & OBD_MD_FLGROUP))
2836 /* packing fid and converting it to LE for storing into EA.
2837 * Here ->o_stripe_idx should be filled by LOV and rest of
2838 * fields - by client. */
2839 ff.ff_fid.id = cpu_to_le64(oa->o_fid);
2840 ff.ff_fid.f_type = cpu_to_le32(oa->o_stripe_idx);
2841 ff.ff_fid.generation = cpu_to_le32(oa->o_generation);
2842 ff.ff_objid = cpu_to_le64(oa->o_id);
2843 ff.ff_group = cpu_to_le64(oa->o_gr);
2845 CDEBUG(D_INODE, "storing filter fid EA ("LPU64"/%u/%u"
2846 LPU64"/"LPU64")\n", oa->o_fid, oa->o_stripe_idx,
2847 oa->o_generation, oa->o_id, oa->o_gr);
2849 rc = fsfilt_set_md(obd, inode, handle, &ff, sizeof(ff), "fid");
2851 CERROR("store fid in object failed! rc: %d\n", rc);
2853 CDEBUG(D_HA, "OSS object without fid info!\n");
2859 /* this is called from filter_truncate() until we have filter_punch() */
2860 int filter_setattr_internal(struct obd_export *exp, struct dentry *dentry,
2861 struct obdo *oa, struct obd_trans_info *oti)
2863 unsigned int orig_ids[MAXQUOTAS] = {0, 0};
2864 struct llog_cookie *fcc = NULL;
2865 struct filter_obd *filter;
2866 int rc, err, locked = 0, sync = 0;
2867 unsigned int ia_valid;
2868 struct inode *inode;
2873 LASSERT(dentry != NULL);
2874 LASSERT(!IS_ERR(dentry));
2876 inode = dentry->d_inode;
2877 LASSERT(inode != NULL);
2879 filter = &exp->exp_obd->u.filter;
2880 iattr_from_obdo(&iattr, oa, oa->o_valid);
2881 ia_valid = iattr.ia_valid;
2883 if (oa->o_valid & OBD_MD_FLCOOKIE) {
2884 OBD_ALLOC(fcc, sizeof(*fcc));
2886 memcpy(fcc, obdo_logcookie(oa), sizeof(*fcc));
2889 if (ia_valid & ATTR_SIZE || ia_valid & (ATTR_UID | ATTR_GID)) {
2891 LOCK_INODE_MUTEX(inode);
2895 /* If the inode still has SUID+SGID bits set (see filter_precreate())
2896 * then we will accept the UID+GID sent by the client during write for
2897 * initializing the ownership of this inode. We only allow this to
2898 * happen once so clear these bits in setattr. In 2.6 kernels it is
2899 * possible to get ATTR_UID and ATTR_GID separately, so we only clear
2900 * the flags that are actually being set. */
2901 if (ia_valid & (ATTR_UID | ATTR_GID)) {
2902 CDEBUG(D_INODE, "update UID/GID to %lu/%lu\n",
2903 (unsigned long)oa->o_uid, (unsigned long)oa->o_gid);
2905 if ((inode->i_mode & S_ISUID) && (ia_valid & ATTR_UID)) {
2906 if (!(ia_valid & ATTR_MODE)) {
2907 iattr.ia_mode = inode->i_mode;
2908 iattr.ia_valid |= ATTR_MODE;
2910 iattr.ia_mode &= ~S_ISUID;
2912 if ((inode->i_mode & S_ISGID) && (ia_valid & ATTR_GID)) {
2913 if (!(iattr.ia_valid & ATTR_MODE)) {
2914 iattr.ia_mode = inode->i_mode;
2915 iattr.ia_valid |= ATTR_MODE;
2917 iattr.ia_mode &= ~S_ISGID;
2920 orig_ids[USRQUOTA] = inode->i_uid;
2921 orig_ids[GRPQUOTA] = inode->i_gid;
2922 handle = fsfilt_start_log(exp->exp_obd, inode,
2923 FSFILT_OP_SETATTR, oti, 1);
2925 GOTO(out_unlock, rc = PTR_ERR(handle));
2927 /* update inode EA only once when inode is suid bit marked. As
2928 * on 2.6.x UID and GID may be set separately, we check here
2929 * only one of them to avoid double setting. */
2930 if (inode->i_mode & S_ISUID)
2931 filter_update_fidea(exp, inode, handle, oa);
2933 handle = fsfilt_start(exp->exp_obd, inode,
2934 FSFILT_OP_SETATTR, oti);
2936 GOTO(out_unlock, rc = PTR_ERR(handle));
2938 if (oa->o_valid & OBD_MD_FLFLAGS) {
2939 rc = fsfilt_iocontrol(exp->exp_obd, inode, NULL,
2940 EXT3_IOC_SETFLAGS, (long)&oa->o_flags);
2942 rc = fsfilt_setattr(exp->exp_obd, dentry, handle, &iattr, 1);
2944 /* set cancel cookie callback function */
2945 sync = fsfilt_add_journal_cb(exp->exp_obd, 0, handle,
2946 filter_cancel_cookies_cb,
2950 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SETATTR_CREDITS))
2951 fsfilt_extend(exp->exp_obd, inode, 0, handle);
2953 /* The truncate might have used up our transaction credits. Make
2954 * sure we have one left for the last_rcvd update. */
2955 err = fsfilt_extend(exp->exp_obd, inode, 1, handle);
2957 rc = filter_finish_transno(exp, oti, rc, sync);
2959 filter_cancel_cookies_cb(exp->exp_obd, 0, fcc, rc);
2963 err = fsfilt_commit(exp->exp_obd, inode, handle, 0);
2965 CERROR("error on commit, err = %d\n", err);
2973 /* Let's flush truncated page on disk immediately, then we can
2974 * avoid need to search for page aliases before directio writes
2975 * and this sort of stuff at expense of somewhat slower
2976 * truncates not on a page boundary. I believe this is the only
2977 * place in filter code that can lead to pages getting to
2978 * pagecache so far. */
2979 filter_clear_truncated_page(inode);
2980 UNLOCK_INODE_MUTEX(inode);
2987 UNLOCK_INODE_MUTEX(inode);
2990 OBD_FREE(fcc, sizeof(*fcc));
2992 /* trigger quota release */
2993 if (ia_valid & (ATTR_SIZE | ATTR_UID | ATTR_GID)) {
2994 unsigned int cur_ids[MAXQUOTAS] = {oa->o_uid, oa->o_gid};
2995 int rc2 = lquota_adjust(filter_quota_interface_ref,
2996 exp->exp_obd, cur_ids,
2997 orig_ids, rc, FSFILT_OP_SETATTR);
2998 CDEBUG(rc2 ? D_ERROR : D_QUOTA,
2999 "filter adjust qunit. (rc:%d)\n", rc2);
3004 /* this is called from filter_truncate() until we have filter_punch() */
3005 int filter_setattr(struct obd_export *exp, struct obd_info *oinfo,
3006 struct obd_trans_info *oti)
3008 struct ldlm_res_id res_id = { .name = { oinfo->oi_oa->o_id, 0,
3009 oinfo->oi_oa->o_gr, 0 } };
3010 struct filter_mod_data *fmd;
3011 struct lvfs_run_ctxt saved;
3012 struct filter_obd *filter;
3013 struct ldlm_resource *res;
3014 struct dentry *dentry;
3018 rc = filter_auth_capa(exp, NULL, oinfo_mdsno(oinfo),
3019 oinfo_capa(oinfo), CAPA_OPC_META_WRITE);
3023 dentry = __filter_oa2dentry(exp->exp_obd, oinfo->oi_oa,
3026 RETURN(PTR_ERR(dentry));
3028 filter = &exp->exp_obd->u.filter;
3029 push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
3032 if (oinfo->oi_oa->o_valid &
3033 (OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME)) {
3034 fmd = filter_fmd_get(exp,oinfo->oi_oa->o_id,oinfo->oi_oa->o_gr);
3035 if (fmd && fmd->fmd_mactime_xid < oti->oti_xid)
3036 fmd->fmd_mactime_xid = oti->oti_xid;
3037 filter_fmd_put(exp, fmd);
3040 /* setting objects attributes (including owner/group) */
3041 rc = filter_setattr_internal(exp, dentry, oinfo->oi_oa, oti);
3043 GOTO(out_unlock, rc);
3045 res = ldlm_resource_get(exp->exp_obd->obd_namespace, NULL,
3046 &res_id, LDLM_EXTENT, 0);
3049 rc = ldlm_res_lvbo_update(res, NULL, 0, 0);
3050 ldlm_resource_putref(res);
3053 oinfo->oi_oa->o_valid = OBD_MD_FLID;
3055 /* Quota release need uid/gid info */
3056 obdo_from_inode(oinfo->oi_oa, dentry->d_inode,
3057 FILTER_VALID_FLAGS | OBD_MD_FLUID | OBD_MD_FLGID);
3063 pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
3067 /* XXX identical to osc_unpackmd */
3068 static int filter_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
3069 struct lov_mds_md *lmm, int lmm_bytes)
3075 if (lmm_bytes < sizeof (*lmm)) {
3076 CERROR("lov_mds_md too small: %d, need %d\n",
3077 lmm_bytes, (int)sizeof(*lmm));
3080 /* XXX LOV_MAGIC etc check? */
3082 if (lmm->lmm_object_id == cpu_to_le64(0)) {
3083 CERROR("lov_mds_md: zero lmm_object_id\n");
3088 lsm_size = lov_stripe_md_size(1);
3092 if (*lsmp != NULL && lmm == NULL) {
3093 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
3094 OBD_FREE(*lsmp, lsm_size);
3099 if (*lsmp == NULL) {
3100 OBD_ALLOC(*lsmp, lsm_size);
3104 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
3105 if ((*lsmp)->lsm_oinfo[0] == NULL) {
3106 OBD_FREE(*lsmp, lsm_size);
3109 loi_init((*lsmp)->lsm_oinfo[0]);
3113 /* XXX zero *lsmp? */
3114 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
3115 LASSERT((*lsmp)->lsm_object_id);
3118 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
3123 /* caller must hold fo_create_locks[oa->o_gr] */
3124 static int filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
3125 struct filter_obd *filter)
3127 struct obdo doa; /* XXX obdo on stack */
3133 LASSERT(oa->o_gr != 0);
3134 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
3135 LASSERT(down_trylock(&filter->fo_create_locks[oa->o_gr]) != 0);
3137 memset(&doa, 0, sizeof(doa));
3139 doa.o_valid |= OBD_MD_FLGROUP;
3140 doa.o_gr = oa->o_gr;
3141 doa.o_mode = S_IFREG;
3143 if (!test_bit(doa.o_gr, &filter->fo_destroys_in_progress)) {
3144 CERROR("%s:["LPU64"] destroys_in_progress already cleared\n",
3145 exp->exp_obd->obd_name, doa.o_gr);
3149 last = filter_last_id(filter, doa.o_gr);
3151 CWARN("%s: deleting orphan objects from "LPU64" to "LPU64"\n",
3152 exp->exp_obd->obd_name, oa->o_id + 1, last);
3154 for (id = last; id > oa->o_id; id--) {
3156 rc = filter_destroy(exp, &doa, NULL, NULL, NULL);
3157 if (rc && rc != -ENOENT) /* this is pretty fatal... */
3158 CEMERG("error destroying precreate objid "LPU64": %d\n",
3160 filter_set_last_id(filter, id - 1, doa.o_gr);
3161 /* update last_id on disk periodically so that if we restart
3162 * we don't need to re-scan all of the just-deleted objects. */
3163 if ((id & 511) == 0)
3164 filter_update_last_objid(exp->exp_obd, doa.o_gr, 0);
3167 CDEBUG(D_HA, "%s: after destroy: set last_objids["LPU64"] = "LPU64"\n",
3168 exp->exp_obd->obd_name, doa.o_gr, oa->o_id);
3170 rc = filter_update_last_objid(exp->exp_obd, doa.o_gr, 1);
3171 clear_bit(doa.o_gr, &filter->fo_destroys_in_progress);
3176 static int filter_precreate(struct obd_device *obd, struct obdo *oa,
3177 obd_gr group, int *num);
3178 /* returns a negative error or a nonnegative number of files to create */
3179 static int filter_handle_precreate(struct obd_export *exp, struct obdo *oa,
3180 obd_gr group, struct obd_trans_info *oti)
3182 struct obd_device *obd = exp->exp_obd;
3183 struct filter_obd *filter = &obd->u.filter;
3187 /* delete orphans request */
3188 if ((oa->o_valid & OBD_MD_FLFLAGS) && (oa->o_flags & OBD_FL_DELORPHAN)){
3189 if (oti->oti_conn_cnt < exp->exp_conn_cnt) {
3190 CERROR("%s: dropping old orphan cleanup request\n",
3194 /* This causes inflight precreates to abort and drop lock */
3195 set_bit(group, &filter->fo_destroys_in_progress);
3196 down(&filter->fo_create_locks[group]);
3197 if (!test_bit(group, &filter->fo_destroys_in_progress)) {
3198 CERROR("%s:["LPU64"] destroys_in_progress already cleared\n",
3199 exp->exp_obd->obd_name, group);
3200 up(&filter->fo_create_locks[group]);
3203 diff = oa->o_id - filter_last_id(filter, group);
3204 CDEBUG(D_HA, "filter_last_id() = "LPU64" -> diff = %d\n",
3205 filter_last_id(filter, group), diff);
3207 if (-diff > OST_MAX_PRECREATE) {
3208 CERROR("%s: ignoring bogus orphan destroy request: "
3209 "obdid "LPU64" last_id "LPU64"\n", obd->obd_name,
3210 oa->o_id, filter_last_id(filter, group));
3211 /* FIXME: should reset precreate_next_id on MDS */
3212 GOTO(out, rc = -EINVAL);
3215 rc = filter_destroy_precreated(exp, oa, filter);
3217 CERROR("%s: unable to write lastobjid, but "
3218 "orphans were deleted\n", obd->obd_name);
3221 /* XXX: Used by MDS for the first time! */
3222 clear_bit(group, &filter->fo_destroys_in_progress);
3225 down(&filter->fo_create_locks[group]);
3226 if (oti->oti_conn_cnt < exp->exp_conn_cnt) {
3227 CERROR("%s: dropping old precreate request\n",
3231 /* only precreate if group == 0 and o_id is specfied */
3232 if (group < FILTER_GROUP_MDS0 || oa->o_id == 0)
3235 diff = oa->o_id - filter_last_id(filter, group);
3236 CDEBUG(D_HA, "filter_last_id() = "LPU64" -> diff = %d\n",
3237 filter_last_id(filter, group), diff);
3239 LASSERTF(diff >= 0,"%s: "LPU64" - "LPU64" = %d\n",obd->obd_name,
3240 oa->o_id, filter_last_id(filter, group), diff);
3244 oa->o_id = filter_last_id(&obd->u.filter, group);
3245 rc = filter_precreate(obd, oa, group, &diff);
3246 oa->o_id = filter_last_id(&obd->u.filter, group);
3248 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
3251 /* else diff == 0 */
3254 up(&filter->fo_create_locks[group]);
3258 static int filter_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3261 struct filter_obd *filter = &obd->u.filter;
3262 int blockbits = obd->u.obt.obt_sb->s_blocksize_bits;
3266 /* at least try to account for cached pages. its still racey and
3267 * might be under-reporting if clients haven't announced their
3268 * caches with brw recently */
3269 spin_lock(&obd->obd_osfs_lock);
3270 rc = fsfilt_statfs(obd, obd->u.obt.obt_sb, max_age);
3271 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
3272 spin_unlock(&obd->obd_osfs_lock);
3274 CDEBUG(D_SUPER | D_CACHE, "blocks cached "LPU64" granted "LPU64
3275 " pending "LPU64" free "LPU64" avail "LPU64"\n",
3276 filter->fo_tot_dirty, filter->fo_tot_granted,
3277 filter->fo_tot_pending,
3278 osfs->os_bfree << blockbits, osfs->os_bavail << blockbits);
3280 filter_grant_sanity_check(obd, __FUNCTION__);
3282 osfs->os_bavail -= min(osfs->os_bavail, GRANT_FOR_LLOG(obd) +
3283 ((filter->fo_tot_dirty + filter->fo_tot_pending +
3284 osfs->os_bsize - 1) >> blockbits));
3286 /* set EROFS to state field if FS is mounted as RDONLY. The goal is to
3287 * stop creating files on MDS if OST is not good shape to create
3289 osfs->os_state = (filter->fo_obt.obt_sb->s_flags & MS_RDONLY) ?
3294 /* We rely on the fact that only one thread will be creating files in a given
3295 * group at a time, which is why we don't need an atomic filter_get_new_id.
3296 * Even if we had that atomic function, the following race would exist:
3298 * thread 1: gets id x from filter_next_id
3299 * thread 2: gets id (x + 1) from filter_next_id
3300 * thread 2: creates object (x + 1)
3301 * thread 1: tries to create object x, gets -ENOSPC
3303 * Caller must hold fo_create_locks[group]
3305 static int filter_precreate(struct obd_device *obd, struct obdo *oa,
3306 obd_gr group, int *num)
3308 struct dentry *dchild = NULL, *dparent = NULL;
3309 struct filter_obd *filter;
3310 struct obd_statfs *osfs;
3311 int err = 0, rc = 0, recreate_obj = 0, i;
3312 unsigned long enough_time = jiffies + min(obd_timeout * HZ / 4, 10U*HZ);
3314 void *handle = NULL;
3317 filter = &obd->u.filter;
3319 LASSERT(down_trylock(&filter->fo_create_locks[group]) != 0);
3321 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_PRECREATE, obd_timeout / 2);
3323 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
3324 (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
3327 OBD_ALLOC(osfs, sizeof(*osfs));
3330 rc = filter_statfs(obd, osfs, cfs_time_current_64() - HZ);
3331 if (rc == 0 && osfs->os_bavail < (osfs->os_blocks >> 10)) {
3332 CDEBUG(D_HA,"%s: not enough space for create "LPU64"\n",
3333 obd->obd_name, osfs->os_bavail <<
3334 filter->fo_vfsmnt->mnt_sb->s_blocksize_bits);
3338 OBD_FREE(osfs, sizeof(*osfs));
3343 CDEBUG(D_HA, "%s: precreating %d objects in group "LPU64" at "LPU64"\n",
3344 obd->obd_name, *num, group, oa->o_id);
3346 for (i = 0; i < *num && err == 0; i++) {
3347 int cleanup_phase = 0;
3349 if (test_bit(group, &filter->fo_destroys_in_progress)) {
3350 CWARN("%s: create aborted by destroy\n",
3359 last_id = filter_last_id(filter, group);
3360 if (next_id > last_id) {
3361 CERROR("Error: Trying to recreate obj greater"
3362 "than last id "LPD64" > "LPD64"\n",
3364 GOTO(cleanup, rc = -EINVAL);
3367 next_id = filter_last_id(filter, group) + 1;
3369 CDEBUG(D_INFO, "precreate objid "LPU64"\n", next_id);
3371 dparent = filter_parent_lock(obd, group, next_id);
3372 if (IS_ERR(dparent))
3373 GOTO(cleanup, rc = PTR_ERR(dparent));
3374 cleanup_phase = 1; /* filter_parent_unlock(dparent) */
3376 dchild = filter_fid2dentry(obd, dparent, group, next_id);
3378 GOTO(cleanup, rc = PTR_ERR(dchild));
3379 cleanup_phase = 2; /* f_dput(dchild) */
3381 if (dchild->d_inode != NULL) {
3382 /* This would only happen if lastobjid was bad on disk*/
3383 /* Could also happen if recreating missing obj but
3387 CERROR("%s: recreating existing object %.*s?\n",
3388 obd->obd_name, dchild->d_name.len,
3389 dchild->d_name.name);
3391 CERROR("%s: Serious error: objid %.*s already "
3392 "exists; is this filesystem corrupt?\n",
3393 obd->obd_name, dchild->d_name.len,
3394 dchild->d_name.name);
3397 GOTO(cleanup, rc = -EEXIST);
3400 handle = fsfilt_start_log(obd, dparent->d_inode,
3401 FSFILT_OP_CREATE, NULL, 1);
3403 GOTO(cleanup, rc = PTR_ERR(handle));
3406 /* We mark object SUID+SGID to flag it for accepting UID+GID
3407 * from client on first write. Currently the permission bits
3408 * on the OST are never used, so this is OK. */
3409 rc = ll_vfs_create(dparent->d_inode, dchild,
3410 S_IFREG | S_ISUID | S_ISGID | 0666, NULL);
3412 CERROR("create failed rc = %d\n", rc);
3416 if (!recreate_obj) {
3417 filter_set_last_id(filter, next_id, group);
3418 err = filter_update_last_objid(obd, group, 0);
3420 CERROR("unable to write lastobjid "
3421 "but file created\n");
3425 switch(cleanup_phase) {
3427 err = fsfilt_commit(obd, dparent->d_inode, handle, 0);
3429 CERROR("error on commit, err = %d\n", err);
3436 filter_parent_unlock(dparent);
3443 if (time_after(jiffies, enough_time)) {
3444 CDEBUG(D_HA, "%s: precreate slow - want %d got %d \n",
3445 obd->obd_name, *num, i);
3451 CDEBUG(D_HA, "%s: created %d objects for group "LPU64": "LPU64"\n",
3452 obd->obd_name, i, group, filter->fo_last_objids[group]);
3457 static int filter_create(struct obd_export *exp, struct obdo *oa,
3458 struct lov_stripe_md **ea, struct obd_trans_info *oti)
3460 struct filter_export_data *fed;
3461 struct obd_device *obd = NULL;
3462 struct filter_obd *filter;
3463 struct lvfs_run_ctxt saved;
3464 struct lov_stripe_md *lsm = NULL;
3465 int rc = 0, diff, group = oa->o_gr;
3468 if (!(oa->o_valid & OBD_MD_FLGROUP) || group == 0) {
3469 CERROR("!!! nid %s sent invalid object group %d\n",
3470 obd_export_nid2str(exp), group);
3475 fed = &exp->exp_filter_data;
3476 filter = &obd->u.filter;
3478 if (fed->fed_group != group) {
3479 CERROR("!!! this export (nid %s) used object group %d "
3480 "earlier; now it's trying to use group %d! This could "
3481 "be a bug in the MDS. Tell CFS.\n",
3482 obd_export_nid2str(exp), fed->fed_group, group);
3486 CDEBUG(D_INFO, "filter_create(od->o_gr="LPU64",od->o_id="LPU64")\n",
3487 oa->o_gr, oa->o_id);
3491 rc = obd_alloc_memmd(exp, &lsm);
3498 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
3500 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
3501 (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
3502 if (oa->o_id > filter_last_id(filter, oa->o_gr)) {
3503 CERROR("recreate objid "LPU64" > last id "LPU64"\n",
3504 oa->o_id, filter_last_id(filter,
3509 down(&filter->fo_create_locks[oa->o_gr]);
3510 rc = filter_precreate(obd, oa, oa->o_gr, &diff);
3511 up(&filter->fo_create_locks[oa->o_gr]);
3514 rc = filter_handle_precreate(exp, oa, oa->o_gr, oti);
3517 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
3518 if (rc && ea != NULL && *ea != lsm) {
3519 obd_free_memmd(exp, &lsm);
3520 } else if (rc == 0 && ea != NULL) {
3521 /* XXX LOV STACKING: the lsm that is passed to us from
3522 * LOV does not have valid lsm_oinfo data structs, so
3523 * don't go touching that. This needs to be fixed in a
3525 lsm->lsm_object_id = oa->o_id;
3532 int filter_destroy(struct obd_export *exp, struct obdo *oa,
3533 struct lov_stripe_md *md, struct obd_trans_info *oti,
3534 struct obd_export *md_exp)
3536 unsigned int qcids[MAXQUOTAS] = {0, 0};
3537 struct obd_device *obd;
3538 struct filter_obd *filter;
3539 struct dentry *dchild = NULL, *dparent = NULL;
3540 struct lvfs_run_ctxt saved;
3541 void *handle = NULL;
3542 struct llog_cookie *fcc = NULL;
3543 int rc, rc2, cleanup_phase = 0, sync = 0;
3547 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
3550 filter = &obd->u.filter;
3552 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
3555 dchild = filter_fid2dentry(obd, NULL, oa->o_gr, oa->o_id);
3557 GOTO(cleanup, rc = PTR_ERR(dchild));
3560 if (dchild->d_inode == NULL) {
3561 CDEBUG(D_INODE, "destroying non-existent object "LPU64"\n",
3563 /* If object already gone, cancel cookie right now */
3564 if (oa->o_valid & OBD_MD_FLCOOKIE) {
3565 fcc = obdo_logcookie(oa);
3566 llog_cancel(llog_get_context(obd, fcc->lgc_subsys + 1),
3568 fcc = NULL; /* we didn't allocate fcc, don't free it */
3570 GOTO(cleanup, rc = -ENOENT);
3573 filter_prepare_destroy(obd, oa->o_id, oa->o_gr);
3575 /* Our MDC connection is established by the MDS to us */
3576 if (oa->o_valid & OBD_MD_FLCOOKIE) {
3577 OBD_ALLOC(fcc, sizeof(*fcc));
3579 memcpy(fcc, obdo_logcookie(oa), sizeof(*fcc));
3581 DQUOT_INIT(dchild->d_inode);
3583 /* we're gonna truncate it first in order to avoid possible deadlock:
3585 * open trasaction open transaction
3586 * down(i_zombie) down(i_zombie)
3587 * restart transaction
3588 * (see BUG 4180) -bzzz
3590 LOCK_INODE_MUTEX(dchild->d_inode);
3591 handle = fsfilt_start_log(obd, dchild->d_inode, FSFILT_OP_SETATTR,
3593 if (IS_ERR(handle)) {
3594 UNLOCK_INODE_MUTEX(dchild->d_inode);
3595 GOTO(cleanup, rc = PTR_ERR(handle));
3598 iattr.ia_valid = ATTR_SIZE;
3600 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 1);
3601 rc2 = fsfilt_commit(obd, dchild->d_inode, handle, 0);
3602 UNLOCK_INODE_MUTEX(dchild->d_inode);
3606 GOTO(cleanup, rc = rc2);
3608 /* We don't actually need to lock the parent until we are unlinking
3609 * here, and not while truncating above. That avoids holding the
3610 * parent lock for a long time during truncate, which can block other
3611 * threads from doing anything to objects in that directory. bug 7171 */
3612 dparent = filter_parent_lock(obd, oa->o_gr, oa->o_id);
3613 if (IS_ERR(dparent))
3614 GOTO(cleanup, rc = PTR_ERR(dparent));
3615 cleanup_phase = 3; /* filter_parent_unlock */
3617 LOCK_INODE_MUTEX(dchild->d_inode);
3618 handle = fsfilt_start_log(obd, dparent->d_inode,FSFILT_OP_UNLINK,oti,1);
3619 if (IS_ERR(handle)) {
3620 UNLOCK_INODE_MUTEX(dchild->d_inode);
3621 GOTO(cleanup, rc = PTR_ERR(handle));
3623 cleanup_phase = 4; /* fsfilt_commit */
3625 /* Quota release need uid/gid of inode */
3626 obdo_from_inode(oa, dchild->d_inode, OBD_MD_FLUID|OBD_MD_FLGID);
3628 filter_fmd_drop(exp, oa->o_id, oa->o_gr);
3630 /* this drops dchild->d_inode->i_mutex unconditionally */
3631 rc = filter_destroy_internal(obd, oa->o_id, oa->o_gr, dparent, dchild);
3635 switch(cleanup_phase) {
3638 sync = fsfilt_add_journal_cb(obd, 0, oti ?
3639 oti->oti_handle : handle,
3640 filter_cancel_cookies_cb,
3642 /* If add_journal_cb failed, then filter_finish_transno
3643 * will commit the handle and we will do a sync
3644 * on commit. then we call callback directly to free
3647 rc = filter_finish_transno(exp, oti, rc, sync);
3649 filter_cancel_cookies_cb(obd, 0, fcc, rc);
3652 rc2 = fsfilt_commit(obd, dparent->d_inode, handle, 0);
3654 CERROR("error on commit, err = %d\n", rc2);
3661 filter_parent_unlock(dparent);
3665 OBD_FREE(fcc, sizeof(*fcc));
3667 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
3670 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
3674 /* trigger quota release */
3675 qcids[USRQUOTA] = oa->o_uid;
3676 qcids[GRPQUOTA] = oa->o_gid;
3677 rc2 = lquota_adjust(filter_quota_interface_ref, obd, qcids, NULL, rc,
3680 CDEBUG(rc ? D_ERROR : D_QUOTA,
3681 "filter adjust qunit! (rc:%d)\n", rc? rc : rc2);
3685 /* NB start and end are used for punch, but not truncate */
3686 static int filter_truncate(struct obd_export *exp, struct obd_info *oinfo,
3687 struct obd_trans_info *oti,
3688 struct ptlrpc_request_set *rqset)
3693 if (oinfo->oi_policy.l_extent.end != OBD_OBJECT_EOF) {
3694 CERROR("PUNCH not supported, only truncate: end = "LPX64"\n",
3695 oinfo->oi_policy.l_extent.end);
3699 CDEBUG(D_INODE, "calling truncate for object "LPU64", valid = "LPX64
3700 ", o_size = "LPD64"\n", oinfo->oi_oa->o_id,
3701 oinfo->oi_oa->o_valid, oinfo->oi_policy.l_extent.start);
3703 rc = filter_auth_capa(exp, NULL, oinfo_mdsno(oinfo),
3704 oinfo_capa(oinfo), CAPA_OPC_OSS_TRUNC);
3708 oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
3709 rc = filter_setattr(exp, oinfo, oti);
3713 static int filter_sync(struct obd_export *exp, struct obdo *oa,
3714 struct lov_stripe_md *lsm, obd_off start, obd_off end,
3717 struct lvfs_run_ctxt saved;
3718 struct filter_obd *filter;
3719 struct dentry *dentry;
3720 struct llog_ctxt *ctxt;
3724 rc = filter_auth_capa(exp, NULL, obdo_mdsno(oa),
3725 (struct lustre_capa *)capa, CAPA_OPC_OSS_WRITE);
3729 filter = &exp->exp_obd->u.filter;
3731 /* an objid of zero is taken to mean "sync whole filesystem" */
3732 if (!oa || !(oa->o_valid & OBD_MD_FLID)) {
3733 rc = fsfilt_sync(exp->exp_obd, filter->fo_obt.obt_sb);
3734 /* flush any remaining cancel messages out to the target */
3735 ctxt = llog_get_context(exp->exp_obd, LLOG_MDS_OST_REPL_CTXT);
3736 llog_sync(ctxt, exp);
3740 dentry = filter_oa2dentry(exp->exp_obd, oa);
3742 RETURN(PTR_ERR(dentry));
3744 push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
3746 LOCK_INODE_MUTEX(dentry->d_inode);
3748 rc = filemap_fdatawrite(dentry->d_inode->i_mapping);
3750 /* just any file to grab fsync method - "file" arg unused */
3751 struct file *file = filter->fo_rcvd_filp;
3753 if (file->f_op && file->f_op->fsync)
3754 rc = file->f_op->fsync(NULL, dentry, 1);
3756 rc2 = filemap_fdatawait(dentry->d_inode->i_mapping);
3760 UNLOCK_INODE_MUTEX(dentry->d_inode);
3762 oa->o_valid = OBD_MD_FLID;
3763 obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
3765 pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
3771 static int filter_get_info(struct obd_export *exp, __u32 keylen,
3772 void *key, __u32 *vallen, void *val)
3774 struct obd_device *obd;
3777 obd = class_exp2obd(exp);
3779 CDEBUG(D_IOCTL, "invalid client export %p\n", exp);
3783 if (keylen == strlen("blocksize") &&
3784 memcmp(key, "blocksize", keylen) == 0) {
3785 __u32 *blocksize = val;
3786 *vallen = sizeof(*blocksize);
3787 *blocksize = obd->u.obt.obt_sb->s_blocksize;
3791 if (keylen == strlen("blocksize_bits") &&
3792 memcmp(key, "blocksize_bits", keylen) == 0) {
3793 __u32 *blocksize_bits = val;
3794 *vallen = sizeof(*blocksize_bits);
3795 *blocksize_bits = obd->u.obt.obt_sb->s_blocksize_bits;
3799 if (keylen >= strlen("last_id") && memcmp(key, "last_id", 7) == 0) {
3800 obd_id *last_id = val;
3801 /* FIXME: object groups */
3802 *last_id = filter_last_id(&obd->u.filter, 0);
3805 CDEBUG(D_IOCTL, "invalid key\n");
3809 static int filter_set_info_async(struct obd_export *exp, __u32 keylen,
3810 void *key, __u32 vallen, void *val,
3811 struct ptlrpc_request_set *set)
3813 struct obd_device *obd;
3814 struct obd_llogs *llog;
3815 struct llog_ctxt *ctxt;
3821 CDEBUG(D_IOCTL, "invalid export %p\n", exp);
3825 if (KEY_IS(KEY_CAPA_KEY)) {
3826 rc = filter_update_capa_key(obd, (struct lustre_capa_key *)val);
3828 CERROR("filter update capability key failed: %d\n", rc);
3832 if (KEY_IS(KEY_REVIMP_UPD)) {
3833 filter_revimp_update(exp);
3837 if (keylen < strlen(KEY_MDS_CONN) ||
3838 memcmp(key, KEY_MDS_CONN, keylen) != 0)
3841 LCONSOLE_WARN("%s: received MDS connection from %s\n", obd->obd_name,
3842 obd_export_nid2str(exp));
3843 obd->u.filter.fo_mdc_conn.cookie = exp->exp_handle.h_cookie;
3845 /* setup llog imports */
3846 LASSERT(val != NULL);
3847 group = (int)(*(__u32 *)val);
3848 LASSERT(group >= FILTER_GROUP_MDS0);
3850 llog = filter_grab_llog_for_group(obd, group, exp);
3851 LASSERT(llog != NULL);
3852 ctxt = llog_get_context_from_llogs(llog, LLOG_MDS_OST_REPL_CTXT);
3853 LASSERTF(ctxt != NULL, "ctxt is not null\n"),
3855 rc = llog_receptor_accept(ctxt, exp->exp_imp_reverse);
3857 lquota_setinfo(filter_quota_interface_ref, exp, obd);
3862 int filter_iocontrol(unsigned int cmd, struct obd_export *exp,
3863 int len, void *karg, void *uarg)
3865 struct obd_device *obd = exp->exp_obd;
3866 struct obd_ioctl_data *data = karg;
3870 case OBD_IOC_ABORT_RECOVERY: {
3871 CERROR("aborting recovery for device %s\n", obd->obd_name);
3872 target_stop_recovery_thread(obd);
3876 case OBD_IOC_SYNC: {
3877 CDEBUG(D_HA, "syncing ost %s\n", obd->obd_name);
3878 rc = fsfilt_sync(obd, obd->u.obt.obt_sb);
3882 case OBD_IOC_SET_READONLY: {
3884 struct super_block *sb = obd->u.obt.obt_sb;
3885 struct inode *inode = sb->s_root->d_inode;
3886 BDEVNAME_DECLARE_STORAGE(tmp);
3887 CERROR("*** setting device %s read-only ***\n",
3888 ll_bdevname(sb, tmp));
3890 handle = fsfilt_start(obd, inode, FSFILT_OP_MKNOD, NULL);
3891 if (!IS_ERR(handle))
3892 rc = fsfilt_commit(obd, inode, handle, 1);
3894 CDEBUG(D_HA, "syncing ost %s\n", obd->obd_name);
3895 rc = fsfilt_sync(obd, obd->u.obt.obt_sb);
3897 lvfs_set_rdonly(obd, obd->u.obt.obt_sb);
3901 case OBD_IOC_CATLOGLIST: {
3902 rc = llog_catalog_list(obd, 1, data);
3906 case OBD_IOC_LLOG_CANCEL:
3907 case OBD_IOC_LLOG_REMOVE:
3908 case OBD_IOC_LLOG_INFO:
3909 case OBD_IOC_LLOG_PRINT: {
3910 /* FIXME to be finished */
3911 RETURN(-EOPNOTSUPP);
3913 struct llog_ctxt *ctxt = NULL;
3915 push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
3916 rc = llog_ioctl(ctxt, cmd, data);
3917 pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
3930 static int filter_health_check(struct obd_device *obd)
3932 #ifdef USE_HEALTH_CHECK_WRITE
3933 struct filter_obd *filter = &obd->u.filter;
3938 * health_check to return 0 on healthy
3939 * and 1 on unhealthy.
3941 if (obd->u.obt.obt_sb->s_flags & MS_RDONLY)
3944 #ifdef USE_HEALTH_CHECK_WRITE
3945 LASSERT(filter->fo_health_check_filp != NULL);
3946 rc |= !!lvfs_check_io_health(obd, filter->fo_health_check_filp);
3951 static struct dentry *filter_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
3954 return filter_fid2dentry(data, NULL, gr, id);
3957 static int filter_process_config(struct obd_device *obd, obd_count len,
3960 struct lustre_cfg *lcfg = buf;
3961 struct lprocfs_static_vars lvars;
3964 lprocfs_init_vars(filter, &lvars);
3966 rc = class_process_proc_param(PARAM_OST, lvars.obd_vars, lcfg, obd);
3970 static struct lvfs_callback_ops filter_lvfs_ops = {
3971 l_fid2dentry: filter_lvfs_fid2dentry,
3974 static struct obd_ops filter_obd_ops = {
3975 .o_owner = THIS_MODULE,
3976 .o_get_info = filter_get_info,
3977 .o_set_info_async = filter_set_info_async,
3978 .o_setup = filter_setup,
3979 .o_precleanup = filter_precleanup,
3980 .o_cleanup = filter_cleanup,
3981 .o_connect = filter_connect,
3982 .o_reconnect = filter_reconnect,
3983 .o_disconnect = filter_disconnect,
3984 .o_ping = filter_ping,
3985 .o_init_export = filter_init_export,
3986 .o_destroy_export = filter_destroy_export,
3987 .o_statfs = filter_statfs,
3988 .o_getattr = filter_getattr,
3989 .o_unpackmd = filter_unpackmd,
3990 .o_create = filter_create,
3991 .o_setattr = filter_setattr,
3992 .o_destroy = filter_destroy,
3993 .o_brw = filter_brw,
3994 .o_punch = filter_truncate,
3995 .o_sync = filter_sync,
3996 .o_preprw = filter_preprw,
3997 .o_commitrw = filter_commitrw,
3998 .o_llog_init = filter_llog_init,
3999 .o_llog_connect = filter_llog_connect,
4000 .o_llog_finish = filter_llog_finish,
4001 .o_iocontrol = filter_iocontrol,
4002 .o_health_check = filter_health_check,
4003 .o_process_config = filter_process_config,
4006 quota_interface_t *filter_quota_interface_ref;
4007 extern quota_interface_t filter_quota_interface;
4009 static int __init obdfilter_init(void)
4011 struct lprocfs_static_vars lvars;
4014 lprocfs_init_vars(filter, &lvars);
4016 request_module("lquota");
4017 OBD_ALLOC(obdfilter_created_scratchpad,
4018 OBDFILTER_CREATED_SCRATCHPAD_ENTRIES *
4019 sizeof(*obdfilter_created_scratchpad));
4020 if (obdfilter_created_scratchpad == NULL)
4023 ll_fmd_cachep = cfs_mem_cache_create("ll_fmd_cache",
4024 sizeof(struct filter_mod_data),
4027 GOTO(out, rc = -ENOMEM);
4029 filter_quota_interface_ref = PORTAL_SYMBOL_GET(filter_quota_interface);
4030 init_obd_quota_ops(filter_quota_interface_ref, &filter_obd_ops);
4032 rc = class_register_type(&filter_obd_ops, NULL, lvars.module_vars,
4033 LUSTRE_OST_NAME, NULL);
4037 err = cfs_mem_cache_destroy(ll_fmd_cachep);
4038 LASSERTF(err == 0, "Cannot destroy ll_fmd_cachep: rc %d\n",err);
4039 ll_fmd_cachep = NULL;
4041 if (filter_quota_interface_ref)
4042 PORTAL_SYMBOL_PUT(filter_quota_interface);
4044 OBD_FREE(obdfilter_created_scratchpad,
4045 OBDFILTER_CREATED_SCRATCHPAD_ENTRIES *
4046 sizeof(*obdfilter_created_scratchpad));
4052 static void __exit obdfilter_exit(void)
4054 if (filter_quota_interface_ref)
4055 PORTAL_SYMBOL_PUT(filter_quota_interface);
4057 if (ll_fmd_cachep) {
4058 int rc = cfs_mem_cache_destroy(ll_fmd_cachep);
4059 LASSERTF(rc == 0, "Cannot destroy ll_fmd_cachep: rc %d\n", rc);
4060 ll_fmd_cachep = NULL;
4063 class_unregister_type(LUSTRE_OST_NAME);
4064 OBD_FREE(obdfilter_created_scratchpad,
4065 OBDFILTER_CREATED_SCRATCHPAD_ENTRIES *
4066 sizeof(*obdfilter_created_scratchpad));
4069 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
4070 MODULE_DESCRIPTION("Lustre Filtering OBD driver");
4071 MODULE_LICENSE("GPL");
4073 module_init(obdfilter_init);
4074 module_exit(obdfilter_exit);