1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 * Lustre Metadata Server (MDS) filesystem interface code
7 * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
8 * Author: Andreas Dilger <adilger@clusterfs.com>
10 * This file is part of the Lustre file system, http://www.lustre.org
11 * Lustre is a trademark of Cluster File Systems, Inc.
13 * You may have signed or agreed to another license before downloading
14 * this software. If so, you are bound by the terms and conditions
15 * of that agreement, and the following does not apply to you. See the
16 * LICENSE file included with this distribution for more information.
18 * If you did not agree to a different license, then this copy of Lustre
19 * is open source software; you can redistribute it and/or modify it
20 * under the terms of version 2 of the GNU General Public License as
21 * published by the Free Software Foundation.
23 * In either case, Lustre is distributed in the hope that it will be
24 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
25 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * license text for more details.
30 # define EXPORT_SYMTAB
32 #define DEBUG_SUBSYSTEM S_MDS
34 #include <linux/module.h>
35 #include <linux/kmod.h>
36 #include <linux/version.h>
37 #include <linux/sched.h>
38 #include <lustre_quota.h>
39 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
40 #include <linux/mount.h>
42 #include <lustre_mds.h>
43 #include <obd_class.h>
44 #include <obd_support.h>
45 #include <lustre_lib.h>
46 #include <lustre_fsfilt.h>
47 #include <lustre_disk.h>
48 #include <libcfs/list.h>
50 #include "mds_internal.h"
53 static int mds_export_stats_init(struct obd_device *obd, struct obd_export *exp)
57 rc = lprocfs_exp_setup(exp);
60 num_stats = (sizeof(*obd->obd_type->typ_ops) / sizeof(void *)) +
62 exp->exp_ops_stats = lprocfs_alloc_stats(num_stats);
63 if (exp->exp_ops_stats == NULL)
65 lprocfs_init_ops_stats(LPROC_MDS_LAST, exp->exp_ops_stats);
66 mds_stats_counter_init(exp->exp_ops_stats);
67 lprocfs_register_stats(exp->exp_proc, "stats", exp->exp_ops_stats);
71 /* Add client data to the MDS. We use a bitmap to locate a free space
72 * in the last_rcvd file if cl_off is -1 (i.e. a new client).
73 * Otherwise, we have just read the data from the last_rcvd file and
76 * It should not be possible to fail adding an existing client - otherwise
77 * mds_init_server_data() callsite needs to be fixed.
79 int mds_client_add(struct obd_device *obd, struct obd_export *exp,
82 struct mds_obd *mds = &obd->u.mds;
83 struct mds_export_data *med = &exp->exp_mds_data;
84 unsigned long *bitmap = mds->mds_client_bitmap;
85 int new_client = (cl_idx == -1);
89 LASSERT(bitmap != NULL);
90 LASSERTF(cl_idx > -2, "%d\n", cl_idx);
92 /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
93 if (!strcmp(med->med_mcd->mcd_uuid, obd->obd_uuid.uuid))
96 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
97 * there's no need for extra complication here
100 cl_idx = find_first_zero_bit(bitmap, LR_MAX_CLIENTS);
102 if (cl_idx >= LR_MAX_CLIENTS ||
103 OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_CLIENT_ADD)) {
104 CERROR("no room for %u clients - fix LR_MAX_CLIENTS\n",
108 if (test_and_set_bit(cl_idx, bitmap)) {
109 cl_idx = find_next_zero_bit(bitmap, LR_MAX_CLIENTS,
114 if (test_and_set_bit(cl_idx, bitmap)) {
115 CERROR("MDS client %d: bit already set in bitmap!!\n",
121 CDEBUG(D_INFO, "client at idx %d with UUID '%s' added\n",
122 cl_idx, med->med_mcd->mcd_uuid);
124 med->med_lr_idx = cl_idx;
125 med->med_lr_off = le32_to_cpu(mds->mds_server_data->lsd_client_start) +
126 (cl_idx * le16_to_cpu(mds->mds_server_data->lsd_client_size));
127 LASSERTF(med->med_lr_off > 0, "med_lr_off = %llu\n", med->med_lr_off);
128 mds_export_stats_init(obd, exp);
131 struct lvfs_run_ctxt saved;
132 loff_t off = med->med_lr_off;
133 struct file *file = mds->mds_rcvd_filp;
136 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
137 handle = fsfilt_start(obd, file->f_dentry->d_inode,
138 FSFILT_OP_SETATTR, NULL);
139 if (IS_ERR(handle)) {
140 rc = PTR_ERR(handle);
141 CERROR("unable to start transaction: rc %d\n", rc);
143 rc = fsfilt_add_journal_cb(obd, 0, handle,
144 target_client_add_cb, exp);
146 exp->exp_need_sync = 1;
147 rc = fsfilt_write_record(obd, file, med->med_mcd,
148 sizeof(*med->med_mcd),
149 &off, rc /* sync if no cb */);
150 fsfilt_commit(obd, file->f_dentry->d_inode, handle, 0);
153 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
157 CDEBUG(D_INFO, "wrote client mcd at idx %u off %llu (len %u)\n",
158 med->med_lr_idx, med->med_lr_off,
159 (unsigned int)sizeof(*med->med_mcd));
164 int mds_client_free(struct obd_export *exp)
166 struct mds_export_data *med = &exp->exp_mds_data;
167 struct mds_obd *mds = &exp->exp_obd->u.mds;
168 struct obd_device *obd = exp->exp_obd;
169 struct mds_client_data zero_mcd;
170 struct lvfs_run_ctxt saved;
178 /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
179 if (!strcmp(med->med_mcd->mcd_uuid, obd->obd_uuid.uuid))
182 CDEBUG(D_INFO, "freeing client at idx %u, offset %lld with UUID '%s'\n",
183 med->med_lr_idx, med->med_lr_off, med->med_mcd->mcd_uuid);
185 LASSERT(mds->mds_client_bitmap != NULL);
187 lprocfs_exp_cleanup(exp);
189 off = med->med_lr_off;
191 /* Don't clear med_lr_idx here as it is likely also unset. At worst
192 * we leak a client slot that will be cleaned on the next recovery. */
194 CERROR("%s: client idx %d has offset %lld\n",
195 obd->obd_name, med->med_lr_idx, off);
196 GOTO(free, rc = -EINVAL);
199 /* Clear the bit _after_ zeroing out the client so we don't
200 race with mds_client_add and zero out new clients.*/
201 if (!test_bit(med->med_lr_idx, mds->mds_client_bitmap)) {
202 CERROR("MDS client %u: bit already clear in bitmap!!\n",
207 if (!(exp->exp_flags & OBD_OPT_FAILOVER)) {
208 memset(&zero_mcd, 0, sizeof zero_mcd);
209 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
210 rc = fsfilt_write_record(obd, mds->mds_rcvd_filp, &zero_mcd,
211 sizeof(zero_mcd), &off,
212 !exp->exp_libclient);
213 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
215 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
216 "zeroing out client %s idx %u in %s rc %d\n",
217 med->med_mcd->mcd_uuid, med->med_lr_idx, LAST_RCVD, rc);
220 if (!test_and_clear_bit(med->med_lr_idx, mds->mds_client_bitmap)) {
221 CERROR("MDS client %u: bit already clear in bitmap!!\n",
227 /* Make sure the server's last_transno is up to date. Do this
228 * after the client is freed so we know all the client's
229 * transactions have been committed. */
230 mds_update_server_data(exp->exp_obd, 0);
234 OBD_FREE(med->med_mcd, sizeof(*med->med_mcd));
240 static int mds_server_free_data(struct mds_obd *mds)
242 OBD_FREE(mds->mds_client_bitmap, LR_MAX_CLIENTS / 8);
243 OBD_FREE(mds->mds_server_data, sizeof(*mds->mds_server_data));
244 mds->mds_server_data = NULL;
249 static int mds_init_server_data(struct obd_device *obd, struct file *file)
251 struct mds_obd *mds = &obd->u.mds;
252 struct lr_server_data *lsd;
253 struct mds_client_data *mcd = NULL;
255 unsigned long last_rcvd_size = file->f_dentry->d_inode->i_size;
260 /* ensure padding in the struct is the correct size */
261 LASSERT(offsetof(struct lr_server_data, lsd_padding) +
262 sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
263 LASSERT(offsetof(struct mds_client_data, mcd_padding) +
264 sizeof(mcd->mcd_padding) == LR_CLIENT_SIZE);
266 OBD_ALLOC_WAIT(lsd, sizeof(*lsd));
270 OBD_ALLOC_WAIT(mds->mds_client_bitmap, LR_MAX_CLIENTS / 8);
271 if (!mds->mds_client_bitmap) {
272 OBD_FREE(lsd, sizeof(*lsd));
276 mds->mds_server_data = lsd;
278 if (last_rcvd_size == 0) {
279 LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name);
281 memcpy(lsd->lsd_uuid, obd->obd_uuid.uuid,sizeof(lsd->lsd_uuid));
282 lsd->lsd_last_transno = 0;
283 mount_count = lsd->lsd_mount_count = 0;
284 lsd->lsd_server_size = cpu_to_le32(LR_SERVER_SIZE);
285 lsd->lsd_client_start = cpu_to_le32(LR_CLIENT_START);
286 lsd->lsd_client_size = cpu_to_le16(LR_CLIENT_SIZE);
287 lsd->lsd_feature_rocompat = cpu_to_le32(OBD_ROCOMPAT_LOVOBJID);
288 lsd->lsd_feature_incompat = cpu_to_le32(OBD_INCOMPAT_MDT);
290 rc = fsfilt_read_record(obd, file, lsd, sizeof(*lsd), &off);
292 CERROR("error reading MDS %s: rc %d\n", LAST_RCVD, rc);
295 if (strcmp(lsd->lsd_uuid, obd->obd_uuid.uuid) != 0) {
296 LCONSOLE_ERROR("Trying to start OBD %s using the wrong"
297 " disk %s. Were the /dev/ assignments "
299 obd->obd_uuid.uuid, lsd->lsd_uuid);
300 GOTO(err_msd, rc = -EINVAL);
303 /* Assume old last_rcvd format unless I_C_LR is set */
304 if (!(lsd->lsd_feature_incompat &
305 cpu_to_le32(OBD_INCOMPAT_COMMON_LR)))
306 lsd->lsd_mount_count = lsd->lsd_compat14;
308 mount_count = le64_to_cpu(lsd->lsd_mount_count);
311 if (lsd->lsd_feature_incompat & ~cpu_to_le32(MDT_INCOMPAT_SUPP)) {
312 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
313 obd->obd_name, le32_to_cpu(lsd->lsd_feature_incompat) &
315 GOTO(err_msd, rc = -EINVAL);
317 if (lsd->lsd_feature_rocompat & ~cpu_to_le32(MDT_ROCOMPAT_SUPP)) {
318 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
319 obd->obd_name, le32_to_cpu(lsd->lsd_feature_rocompat) &
321 /* Do something like remount filesystem read-only */
322 GOTO(err_msd, rc = -EINVAL);
325 lsd->lsd_feature_compat = cpu_to_le32(OBD_COMPAT_MDT);
327 mds->mds_last_transno = le64_to_cpu(lsd->lsd_last_transno);
329 CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
330 obd->obd_name, mds->mds_last_transno);
331 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
332 obd->obd_name, mount_count + 1);
333 CDEBUG(D_INODE, "%s: server data size: %u\n",
334 obd->obd_name, le32_to_cpu(lsd->lsd_server_size));
335 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
336 obd->obd_name, le32_to_cpu(lsd->lsd_client_start));
337 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
338 obd->obd_name, le32_to_cpu(lsd->lsd_client_size));
339 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
340 obd->obd_name, last_rcvd_size);
341 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
342 last_rcvd_size <= le32_to_cpu(lsd->lsd_client_start) ? 0 :
343 (last_rcvd_size - le32_to_cpu(lsd->lsd_client_start)) /
344 le16_to_cpu(lsd->lsd_client_size));
346 if (!lsd->lsd_server_size || !lsd->lsd_client_start ||
347 !lsd->lsd_client_size) {
348 CERROR("Bad last_rcvd contents!\n");
349 GOTO(err_msd, rc = -EINVAL);
352 /* When we do a clean MDS shutdown, we save the last_transno into
353 * the header. If we find clients with higher last_transno values
354 * then those clients may need recovery done. */
355 for (cl_idx = 0, off = le32_to_cpu(lsd->lsd_client_start);
356 off < last_rcvd_size; cl_idx++) {
358 struct obd_export *exp;
359 struct mds_export_data *med;
362 OBD_ALLOC_WAIT(mcd, sizeof(*mcd));
364 GOTO(err_client, rc = -ENOMEM);
367 /* Don't assume off is incremented properly by
368 * fsfilt_read_record(), in case sizeof(*mcd)
369 * isn't the same as lsd->lsd_client_size. */
370 off = le32_to_cpu(lsd->lsd_client_start) +
371 cl_idx * le16_to_cpu(lsd->lsd_client_size);
372 rc = fsfilt_read_record(obd, file, mcd, sizeof(*mcd), &off);
374 CERROR("error reading MDS %s idx %d, off %llu: rc %d\n",
375 LAST_RCVD, cl_idx, off, rc);
376 break; /* read error shouldn't cause startup to fail */
379 if (mcd->mcd_uuid[0] == '\0') {
380 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
385 last_transno = le64_to_cpu(mcd->mcd_last_transno) >
386 le64_to_cpu(mcd->mcd_last_close_transno) ?
387 le64_to_cpu(mcd->mcd_last_transno) :
388 le64_to_cpu(mcd->mcd_last_close_transno);
390 /* These exports are cleaned up by mds_disconnect(), so they
391 * need to be set up like real exports as mds_connect() does.
393 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
394 " srv lr: "LPU64" lx: "LPU64"\n", mcd->mcd_uuid, cl_idx,
395 last_transno, le64_to_cpu(lsd->lsd_last_transno),
396 le64_to_cpu(mcd->mcd_last_xid));
398 exp = class_new_export(obd, (struct obd_uuid *)mcd->mcd_uuid);
400 GOTO(err_client, rc = PTR_ERR(exp));
402 med = &exp->exp_mds_data;
404 rc = mds_client_add(obd, exp, cl_idx);
405 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
409 exp->exp_replay_needed = 1;
410 exp->exp_connecting = 0;
411 obd->obd_recoverable_clients++;
412 obd->obd_max_recoverable_clients++;
413 class_export_put(exp);
415 CDEBUG(D_OTHER, "client at idx %d has last_transno = "LPU64"\n",
416 cl_idx, last_transno);
418 if (last_transno > mds->mds_last_transno)
419 mds->mds_last_transno = last_transno;
423 OBD_FREE(mcd, sizeof(*mcd));
425 obd->obd_last_committed = mds->mds_last_transno;
427 if (obd->obd_recoverable_clients) {
428 CWARN("RECOVERY: service %s, %d recoverable clients, "
429 "last_transno "LPU64"\n", obd->obd_name,
430 obd->obd_recoverable_clients, mds->mds_last_transno);
431 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
432 obd->obd_recovering = 1;
433 obd->obd_recovery_start = CURRENT_SECONDS;
434 /* Only used for lprocfs_status */
435 obd->obd_recovery_end = obd->obd_recovery_start +
436 OBD_RECOVERY_TIMEOUT;
439 mds->mds_mount_count = mount_count + 1;
440 lsd->lsd_mount_count = lsd->lsd_compat14 =
441 cpu_to_le64(mds->mds_mount_count);
443 /* save it, so mount count and last_transno is current */
444 rc = mds_update_server_data(obd, 1);
446 GOTO(err_client, rc);
451 class_disconnect_exports(obd);
453 mds_server_free_data(mds);
457 int mds_fs_setup(struct obd_device *obd, struct vfsmount *mnt)
459 struct mds_obd *mds = &obd->u.mds;
460 struct lvfs_run_ctxt saved;
461 struct dentry *dentry;
466 OBD_FAIL_RETURN(OBD_FAIL_MDS_FS_SETUP, -ENOENT);
468 rc = cleanup_group_info();
472 mds->mds_vfsmnt = mnt;
473 /* why not mnt->mnt_sb instead of mnt->mnt_root->d_inode->i_sb? */
474 obd->u.obt.obt_sb = mnt->mnt_root->d_inode->i_sb;
476 fsfilt_setup(obd, obd->u.obt.obt_sb);
478 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
479 obd->obd_lvfs_ctxt.pwdmnt = mnt;
480 obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
481 obd->obd_lvfs_ctxt.fs = get_ds();
482 obd->obd_lvfs_ctxt.cb_ops = mds_lvfs_ops;
484 /* setup the directory tree */
485 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
486 dentry = simple_mkdir(current->fs->pwd, "ROOT", 0755, 0);
487 if (IS_ERR(dentry)) {
488 rc = PTR_ERR(dentry);
489 CERROR("cannot create ROOT directory: rc = %d\n", rc);
493 mds->mds_rootfid.id = dentry->d_inode->i_ino;
494 mds->mds_rootfid.generation = dentry->d_inode->i_generation;
495 mds->mds_rootfid.f_type = S_IFDIR;
499 dentry = lookup_one_len("__iopen__", current->fs->pwd,
500 strlen("__iopen__"));
501 if (IS_ERR(dentry)) {
502 rc = PTR_ERR(dentry);
503 CERROR("cannot lookup __iopen__ directory: rc = %d\n", rc);
507 mds->mds_fid_de = dentry;
508 if (!dentry->d_inode || is_bad_inode(dentry->d_inode)) {
510 CERROR("__iopen__ directory has no inode? rc = %d\n", rc);
514 dentry = simple_mkdir(current->fs->pwd, "PENDING", 0777, 1);
515 if (IS_ERR(dentry)) {
516 rc = PTR_ERR(dentry);
517 CERROR("cannot create PENDING directory: rc = %d\n", rc);
520 mds->mds_pending_dir = dentry;
523 dentry = simple_mkdir(current->fs->pwd, MDT_LOGS_DIR, 0777, 1);
524 if (IS_ERR(dentry)) {
525 rc = PTR_ERR(dentry);
526 CERROR("cannot create %s directory: rc = %d\n",
528 GOTO(err_pending, rc);
530 mds->mds_logs_dir = dentry;
533 dentry = simple_mkdir(current->fs->pwd, "OBJECTS", 0777, 1);
534 if (IS_ERR(dentry)) {
535 rc = PTR_ERR(dentry);
536 CERROR("cannot create OBJECTS directory: rc = %d\n", rc);
539 mds->mds_objects_dir = dentry;
541 /* open and test the last rcvd file */
542 file = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644);
545 CERROR("cannot open/create %s file: rc = %d\n", LAST_RCVD, rc);
546 GOTO(err_objects, rc = PTR_ERR(file));
548 mds->mds_rcvd_filp = file;
549 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
550 CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
551 file->f_dentry->d_inode->i_mode);
552 GOTO(err_last_rcvd, rc = -ENOENT);
555 rc = mds_init_server_data(obd, file);
557 CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
558 GOTO(err_last_rcvd, rc);
561 /* open and test the lov objd file */
562 file = filp_open(LOV_OBJID, O_RDWR | O_CREAT, 0644);
565 CERROR("cannot open/create %s file: rc = %d\n", LOV_OBJID, rc);
566 GOTO(err_client, rc = PTR_ERR(file));
568 mds->mds_lov_objid_filp = file;
569 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
570 CERROR("%s is not a regular file!: mode = %o\n", LOV_OBJID,
571 file->f_dentry->d_inode->i_mode);
572 GOTO(err_lov_objid, rc = -ENOENT);
575 /* open and test the check io file junk */
576 file = filp_open(HEALTH_CHECK, O_RDWR | O_CREAT, 0644);
579 CERROR("cannot open/create %s file: rc = %d\n", HEALTH_CHECK, rc);
580 GOTO(err_lov_objid, rc = PTR_ERR(file));
582 mds->mds_health_check_filp = file;
583 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
584 CERROR("%s is not a regular file!: mode = %o\n", HEALTH_CHECK,
585 file->f_dentry->d_inode->i_mode);
586 GOTO(err_health_check, rc = -ENOENT);
588 rc = lvfs_check_io_health(obd, file);
590 GOTO(err_health_check, rc);
592 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
597 if (mds->mds_health_check_filp &&
598 filp_close(mds->mds_health_check_filp, 0))
599 CERROR("can't close %s after error\n", HEALTH_CHECK);
601 if (mds->mds_lov_objid_filp && filp_close(mds->mds_lov_objid_filp, 0))
602 CERROR("can't close %s after error\n", LOV_OBJID);
604 class_disconnect_exports(obd);
606 if (mds->mds_rcvd_filp && filp_close(mds->mds_rcvd_filp, 0))
607 CERROR("can't close %s after error\n", LAST_RCVD);
609 dput(mds->mds_objects_dir);
611 dput(mds->mds_logs_dir);
613 dput(mds->mds_pending_dir);
615 dput(mds->mds_fid_de);
620 int mds_fs_cleanup(struct obd_device *obd)
622 struct mds_obd *mds = &obd->u.mds;
623 struct lvfs_run_ctxt saved;
627 LCONSOLE_WARN("%s: shutting down for failover; client state "
628 "will be preserved.\n", obd->obd_name);
630 class_disconnect_exports(obd); /* cleans up client info too */
631 mds_server_free_data(mds);
633 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
634 if (mds->mds_rcvd_filp) {
635 rc = filp_close(mds->mds_rcvd_filp, 0);
636 mds->mds_rcvd_filp = NULL;
638 CERROR("%s file won't close, rc=%d\n", LAST_RCVD, rc);
640 if (mds->mds_lov_objid_filp) {
641 rc = filp_close(mds->mds_lov_objid_filp, 0);
642 mds->mds_lov_objid_filp = NULL;
644 CERROR("%s file won't close, rc=%d\n", LOV_OBJID, rc);
646 if (mds->mds_health_check_filp) {
647 rc = filp_close(mds->mds_health_check_filp, 0);
648 mds->mds_health_check_filp = NULL;
650 CERROR("%s file won't close, rc=%d\n", HEALTH_CHECK, rc);
652 if (mds->mds_objects_dir != NULL) {
653 l_dput(mds->mds_objects_dir);
654 mds->mds_objects_dir = NULL;
656 if (mds->mds_logs_dir) {
657 l_dput(mds->mds_logs_dir);
658 mds->mds_logs_dir = NULL;
660 if (mds->mds_pending_dir) {
661 l_dput(mds->mds_pending_dir);
662 mds->mds_pending_dir = NULL;
665 lquota_fs_cleanup(mds_quota_interface_ref, obd);
667 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
668 shrink_dcache_parent(mds->mds_fid_de);
669 dput(mds->mds_fid_de);
670 LL_DQUOT_OFF(obd->u.obt.obt_sb);
675 /* Creates an object with the same name as its fid. Because this is not at all
676 * performance sensitive, it is accomplished by creating a file, checking the
677 * fid, and renaming it. */
678 int mds_obd_create(struct obd_export *exp, struct obdo *oa,
679 struct lov_stripe_md **ea, struct obd_trans_info *oti)
681 struct mds_obd *mds = &exp->exp_obd->u.mds;
682 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
683 unsigned int tmpname = ll_rand();
685 struct dentry *new_child;
686 struct lvfs_run_ctxt saved;
687 char fidname[LL_FID_NAMELEN];
689 struct lvfs_ucred ucred = { 0 };
690 int rc = 0, err, namelen;
693 /* the owner of object file should always be root */
694 ucred.luc_cap = current->cap_effective | CAP_SYS_RESOURCE;
696 push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, &ucred);
698 sprintf(fidname, "OBJECTS/%u.%u", tmpname, current->pid);
699 filp = filp_open(fidname, O_CREAT | O_EXCL, 0666);
703 CERROR("impossible object name collision %u\n",
707 CERROR("error creating tmp object %u: rc %d\n", tmpname, rc);
711 LASSERT(mds->mds_objects_dir == filp->f_dentry->d_parent);
713 oa->o_id = filp->f_dentry->d_inode->i_ino;
714 oa->o_generation = filp->f_dentry->d_inode->i_generation;
715 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
717 LOCK_INODE_MUTEX(parent_inode);
718 new_child = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
720 if (IS_ERR(new_child)) {
721 CERROR("getting neg dentry for obj rename: %d\n", rc);
722 GOTO(out_close, rc = PTR_ERR(new_child));
724 if (new_child->d_inode != NULL) {
725 CERROR("impossible non-negative obj dentry " LPU64":%u!\n",
726 oa->o_id, oa->o_generation);
730 handle = fsfilt_start(exp->exp_obd, mds->mds_objects_dir->d_inode,
731 FSFILT_OP_RENAME, NULL);
733 GOTO(out_dput, rc = PTR_ERR(handle));
736 rc = vfs_rename(mds->mds_objects_dir->d_inode, filp->f_dentry,
737 mds->mds_objects_dir->d_inode, new_child);
740 CERROR("error renaming new object "LPU64":%u: rc %d\n",
741 oa->o_id, oa->o_generation, rc);
743 err = fsfilt_commit(exp->exp_obd, mds->mds_objects_dir->d_inode,
746 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGENER;
752 UNLOCK_INODE_MUTEX(parent_inode);
753 err = filp_close(filp, 0);
755 CERROR("closing tmpfile %u: rc %d\n", tmpname, rc);
760 pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, &ucred);
764 int mds_obd_destroy(struct obd_export *exp, struct obdo *oa,
765 struct lov_stripe_md *ea, struct obd_trans_info *oti,
766 struct obd_export *md_exp)
768 struct mds_obd *mds = &exp->exp_obd->u.mds;
769 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
770 struct obd_device *obd = exp->exp_obd;
771 struct lvfs_run_ctxt saved;
772 struct lvfs_ucred ucred = { 0 };
773 char fidname[LL_FID_NAMELEN];
774 struct inode *inode = NULL;
777 int err, namelen, rc = 0;
780 ucred.luc_cap = current->cap_effective | CAP_SYS_RESOURCE;
781 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &ucred);
783 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
785 LOCK_INODE_MUTEX(parent_inode);
786 de = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
790 CERROR("error looking up object "LPU64" %s: rc %d\n",
791 oa->o_id, fidname, rc);
794 if (de->d_inode == NULL) {
795 CERROR("destroying non-existent object "LPU64" %s: rc %d\n",
796 oa->o_id, fidname, rc);
797 GOTO(out_dput, rc = -ENOENT);
800 /* Stripe count is 1 here since this is some MDS specific stuff
801 that is unlinked, not spanned across multiple OSTs */
802 handle = fsfilt_start_log(obd, mds->mds_objects_dir->d_inode,
803 FSFILT_OP_UNLINK, oti, 1);
806 GOTO(out_dput, rc = PTR_ERR(handle));
808 /* take a reference to protect inode from truncation within
809 vfs_unlink() context. bug 10409 */
811 atomic_inc(&inode->i_count);
812 rc = vfs_unlink(mds->mds_objects_dir->d_inode, de);
814 CERROR("error destroying object "LPU64":%u: rc %d\n",
815 oa->o_id, oa->o_generation, rc);
817 err = fsfilt_commit(obd, mds->mds_objects_dir->d_inode, handle, 0);
823 UNLOCK_INODE_MUTEX(parent_inode);
828 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &ucred);