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 #include <linux/mount.h>
40 #include <lustre_mds.h>
41 #include <obd_class.h>
42 #include <obd_support.h>
43 #include <lustre_lib.h>
44 #include <lustre_fsfilt.h>
45 #include <lustre_disk.h>
46 #include <libcfs/list.h>
48 #include "mds_internal.h"
51 static int mds_export_stats_init(struct obd_device *obd, struct obd_export *exp)
55 rc = lprocfs_exp_setup(exp);
58 num_stats = (sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
60 exp->exp_ops_stats = lprocfs_alloc_stats(num_stats,
61 LPROCFS_STATS_FLAG_NOPERCPU);
62 if (exp->exp_ops_stats == NULL)
64 lprocfs_init_ops_stats(LPROC_MDS_LAST, exp->exp_ops_stats);
65 mds_stats_counter_init(exp->exp_ops_stats);
66 lprocfs_register_stats(exp->exp_proc, "stats", exp->exp_ops_stats);
70 /* Add client data to the MDS. We use a bitmap to locate a free space
71 * in the last_rcvd file if cl_off is -1 (i.e. a new client).
72 * Otherwise, we have just read the data from the last_rcvd file and
75 * It should not be possible to fail adding an existing client - otherwise
76 * mds_init_server_data() callsite needs to be fixed.
78 int mds_client_add(struct obd_device *obd, struct obd_export *exp,
81 struct mds_obd *mds = &obd->u.mds;
82 struct mds_export_data *med = &exp->exp_mds_data;
83 unsigned long *bitmap = mds->mds_client_bitmap;
84 int new_client = (cl_idx == -1);
87 LASSERT(bitmap != NULL);
88 LASSERTF(cl_idx > -2, "%d\n", cl_idx);
90 /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
91 if (!strcmp(med->med_mcd->mcd_uuid, obd->obd_uuid.uuid))
94 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
95 * there's no need for extra complication here
98 cl_idx = find_first_zero_bit(bitmap, LR_MAX_CLIENTS);
100 if (cl_idx >= LR_MAX_CLIENTS ||
101 OBD_FAIL_CHECK(OBD_FAIL_MDS_CLIENT_ADD)) {
102 CERROR("no room for %u client - fix LR_MAX_CLIENTS\n",
106 if (test_and_set_bit(cl_idx, bitmap)) {
107 cl_idx = find_next_zero_bit(bitmap, LR_MAX_CLIENTS,
112 if (test_and_set_bit(cl_idx, bitmap)) {
113 CERROR("MDS client %d: bit already set in bitmap!!\n",
119 CDEBUG(D_INFO, "client at idx %d with UUID '%s' added\n",
120 cl_idx, med->med_mcd->mcd_uuid);
122 med->med_lr_idx = cl_idx;
123 med->med_lr_off = le32_to_cpu(mds->mds_server_data->lsd_client_start) +
124 (cl_idx * le16_to_cpu(mds->mds_server_data->lsd_client_size));
125 LASSERTF(med->med_lr_off > 0, "med_lr_off = %llu\n", med->med_lr_off);
126 mds_export_stats_init(obd, exp);
129 struct lvfs_run_ctxt saved;
130 loff_t off = med->med_lr_off;
131 struct file *file = mds->mds_rcvd_filp;
135 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
136 handle = fsfilt_start(obd, file->f_dentry->d_inode,
137 FSFILT_OP_SETATTR, NULL);
138 if (IS_ERR(handle)) {
139 rc = PTR_ERR(handle);
140 CERROR("unable to start transaction: rc %d\n", rc);
142 rc = fsfilt_add_journal_cb(obd, 0, handle,
143 target_client_add_cb, exp);
145 spin_lock(&exp->exp_lock);
146 exp->exp_need_sync = 1;
147 spin_unlock(&exp->exp_lock);
149 rc = fsfilt_write_record(obd, file, med->med_mcd,
150 sizeof(*med->med_mcd),
151 &off, rc /* sync if no cb */);
152 fsfilt_commit(obd, file->f_dentry->d_inode, handle, 0);
155 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
159 CDEBUG(D_INFO, "wrote client mcd at idx %u off %llu (len %u)\n",
160 med->med_lr_idx, med->med_lr_off,
161 (unsigned int)sizeof(*med->med_mcd));
166 int mds_client_free(struct obd_export *exp)
168 struct mds_export_data *med = &exp->exp_mds_data;
169 struct mds_obd *mds = &exp->exp_obd->u.mds;
170 struct obd_device *obd = exp->exp_obd;
171 struct mds_client_data zero_mcd;
172 struct lvfs_run_ctxt saved;
180 /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
181 if (!strcmp(med->med_mcd->mcd_uuid, obd->obd_uuid.uuid))
184 CDEBUG(D_INFO, "freeing client at idx %u, offset %lld with UUID '%s'\n",
185 med->med_lr_idx, med->med_lr_off, med->med_mcd->mcd_uuid);
187 LASSERT(mds->mds_client_bitmap != NULL);
189 lprocfs_exp_cleanup(exp);
191 off = med->med_lr_off;
193 /* Don't clear med_lr_idx here as it is likely also unset. At worst
194 * we leak a client slot that will be cleaned on the next recovery. */
196 CERROR("%s: client idx %d has offset %lld\n",
197 obd->obd_name, med->med_lr_idx, off);
198 GOTO(free, rc = -EINVAL);
201 /* Clear the bit _after_ zeroing out the client so we don't
202 race with mds_client_add and zero out new clients.*/
203 if (!test_bit(med->med_lr_idx, mds->mds_client_bitmap)) {
204 CERROR("MDS client %u: bit already clear in bitmap!!\n",
209 if (!(exp->exp_flags & OBD_OPT_FAILOVER)) {
210 memset(&zero_mcd, 0, sizeof zero_mcd);
211 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
212 rc = fsfilt_write_record(obd, mds->mds_rcvd_filp, &zero_mcd,
213 sizeof(zero_mcd), &off,
214 (!exp->exp_libclient ||
215 exp->exp_need_sync));
216 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
218 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
219 "zeroing out client %s idx %u in %s rc %d\n",
220 med->med_mcd->mcd_uuid, med->med_lr_idx, LAST_RCVD, rc);
223 if (!test_and_clear_bit(med->med_lr_idx, mds->mds_client_bitmap)) {
224 CERROR("MDS client %u: bit already clear in bitmap!!\n",
230 /* Make sure the server's last_transno is up to date. Do this
231 * after the client is freed so we know all the client's
232 * transactions have been committed. */
233 mds_update_server_data(exp->exp_obd, 0);
237 OBD_FREE(med->med_mcd, sizeof(*med->med_mcd));
243 static int mds_server_free_data(struct mds_obd *mds)
245 OBD_FREE(mds->mds_client_bitmap, LR_MAX_CLIENTS / 8);
246 OBD_FREE(mds->mds_server_data, sizeof(*mds->mds_server_data));
247 mds->mds_server_data = NULL;
252 static int mds_init_server_data(struct obd_device *obd, struct file *file)
254 struct mds_obd *mds = &obd->u.mds;
255 struct lr_server_data *lsd;
256 struct mds_client_data *mcd = NULL;
258 unsigned long last_rcvd_size = i_size_read(file->f_dentry->d_inode);
263 /* ensure padding in the struct is the correct size */
264 LASSERT(offsetof(struct lr_server_data, lsd_padding) +
265 sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
266 LASSERT(offsetof(struct mds_client_data, mcd_padding) +
267 sizeof(mcd->mcd_padding) == LR_CLIENT_SIZE);
269 OBD_ALLOC_WAIT(lsd, sizeof(*lsd));
273 OBD_ALLOC_WAIT(mds->mds_client_bitmap, LR_MAX_CLIENTS / 8);
274 if (!mds->mds_client_bitmap) {
275 OBD_FREE(lsd, sizeof(*lsd));
279 mds->mds_server_data = lsd;
281 if (last_rcvd_size == 0) {
282 LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name);
284 memcpy(lsd->lsd_uuid, obd->obd_uuid.uuid,sizeof(lsd->lsd_uuid));
285 lsd->lsd_last_transno = 0;
286 mount_count = lsd->lsd_mount_count = 0;
287 lsd->lsd_server_size = cpu_to_le32(LR_SERVER_SIZE);
288 lsd->lsd_client_start = cpu_to_le32(LR_CLIENT_START);
289 lsd->lsd_client_size = cpu_to_le16(LR_CLIENT_SIZE);
290 lsd->lsd_feature_rocompat = cpu_to_le32(OBD_ROCOMPAT_LOVOBJID);
291 lsd->lsd_feature_incompat = cpu_to_le32(OBD_INCOMPAT_MDT);
293 rc = fsfilt_read_record(obd, file, lsd, sizeof(*lsd), &off);
295 CERROR("error reading MDS %s: rc %d\n", LAST_RCVD, rc);
298 if (strcmp(lsd->lsd_uuid, obd->obd_uuid.uuid) != 0) {
299 LCONSOLE_ERROR_MSG(0x157, "Trying to start OBD %s "
300 "using the wrong disk %s. Were the "
301 "/dev/ assignments rearranged?\n",
302 obd->obd_uuid.uuid, lsd->lsd_uuid);
303 GOTO(err_msd, rc = -EINVAL);
305 mount_count = le64_to_cpu(lsd->lsd_mount_count);
308 if (lsd->lsd_feature_incompat & ~cpu_to_le32(MDT_INCOMPAT_SUPP)) {
309 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
310 obd->obd_name, le32_to_cpu(lsd->lsd_feature_incompat) &
312 GOTO(err_msd, rc = -EINVAL);
314 if (lsd->lsd_feature_rocompat & ~cpu_to_le32(MDT_ROCOMPAT_SUPP)) {
315 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
316 obd->obd_name, le32_to_cpu(lsd->lsd_feature_rocompat) &
318 /* Do something like remount filesystem read-only */
319 GOTO(err_msd, rc = -EINVAL);
322 lsd->lsd_feature_compat = cpu_to_le32(OBD_COMPAT_MDT);
324 mds->mds_last_transno = le64_to_cpu(lsd->lsd_last_transno);
326 CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
327 obd->obd_name, mds->mds_last_transno);
328 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
329 obd->obd_name, mount_count + 1);
330 CDEBUG(D_INODE, "%s: server data size: %u\n",
331 obd->obd_name, le32_to_cpu(lsd->lsd_server_size));
332 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
333 obd->obd_name, le32_to_cpu(lsd->lsd_client_start));
334 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
335 obd->obd_name, le32_to_cpu(lsd->lsd_client_size));
336 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
337 obd->obd_name, last_rcvd_size);
338 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
339 last_rcvd_size <= le32_to_cpu(lsd->lsd_client_start) ? 0 :
340 (last_rcvd_size - le32_to_cpu(lsd->lsd_client_start)) /
341 le16_to_cpu(lsd->lsd_client_size));
343 if (!lsd->lsd_server_size || !lsd->lsd_client_start ||
344 !lsd->lsd_client_size) {
345 CERROR("Bad last_rcvd contents!\n");
346 GOTO(err_msd, rc = -EINVAL);
349 /* When we do a clean MDS shutdown, we save the last_transno into
350 * the header. If we find clients with higher last_transno values
351 * then those clients may need recovery done. */
352 for (cl_idx = 0, off = le32_to_cpu(lsd->lsd_client_start);
353 off < last_rcvd_size; cl_idx++) {
355 struct obd_export *exp;
356 struct mds_export_data *med;
359 OBD_ALLOC_WAIT(mcd, sizeof(*mcd));
361 GOTO(err_client, rc = -ENOMEM);
364 /* Don't assume off is incremented properly by
365 * fsfilt_read_record(), in case sizeof(*mcd)
366 * isn't the same as lsd->lsd_client_size. */
367 off = le32_to_cpu(lsd->lsd_client_start) +
368 cl_idx * le16_to_cpu(lsd->lsd_client_size);
369 rc = fsfilt_read_record(obd, file, mcd, sizeof(*mcd), &off);
371 CERROR("error reading MDS %s idx %d, off %llu: rc %d\n",
372 LAST_RCVD, cl_idx, off, rc);
373 break; /* read error shouldn't cause startup to fail */
376 if (mcd->mcd_uuid[0] == '\0') {
377 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
382 last_transno = le64_to_cpu(mcd->mcd_last_transno) >
383 le64_to_cpu(mcd->mcd_last_close_transno) ?
384 le64_to_cpu(mcd->mcd_last_transno) :
385 le64_to_cpu(mcd->mcd_last_close_transno);
387 /* These exports are cleaned up by mds_disconnect(), so they
388 * need to be set up like real exports as mds_connect() does.
390 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
391 " srv lr: "LPU64" lx: "LPU64"\n", mcd->mcd_uuid, cl_idx,
392 last_transno, le64_to_cpu(lsd->lsd_last_transno),
393 le64_to_cpu(mcd->mcd_last_xid));
395 exp = class_new_export(obd, (struct obd_uuid *)mcd->mcd_uuid);
397 if (PTR_ERR(exp) == -EALREADY) {
398 /* export already exists, zero out this one */
399 mcd->mcd_uuid[0] = '\0';
401 GOTO(err_client, rc = PTR_ERR(exp));
404 med = &exp->exp_mds_data;
406 rc = mds_client_add(obd, exp, cl_idx);
407 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
410 spin_lock(&exp->exp_lock);
411 exp->exp_req_replay_needed = 1;
412 exp->exp_connecting = 0;
413 spin_unlock(&exp->exp_lock);
414 obd->obd_max_recoverable_clients++;
415 class_export_put(exp);
417 /* Need to check last_rcvd even for duplicated exports. */
418 CDEBUG(D_OTHER, "client at idx %d has last_transno = "LPU64"\n",
419 cl_idx, last_transno);
421 if (last_transno > mds->mds_last_transno)
422 mds->mds_last_transno = last_transno;
426 OBD_FREE(mcd, sizeof(*mcd));
428 obd->obd_last_committed = mds->mds_last_transno;
430 if (obd->obd_max_recoverable_clients) {
431 /* shouldn't happen in b_new_cmd */
433 CWARN("RECOVERY: service %s, %d recoverable clients, "
434 "last_transno "LPU64"\n", obd->obd_name,
435 obd->obd_max_recoverable_clients, mds->mds_last_transno);
436 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
437 obd->obd_recovering = 1;
438 obd->obd_recovery_start = CURRENT_SECONDS;
439 /* Only used for lprocfs_status */
440 obd->obd_recovery_end = obd->obd_recovery_start +
441 OBD_RECOVERY_TIMEOUT;
444 mds->mds_mount_count = mount_count + 1;
445 lsd->lsd_mount_count = lsd->lsd_compat14 =
446 cpu_to_le64(mds->mds_mount_count);
448 /* save it, so mount count and last_transno is current */
449 rc = mds_update_server_data(obd, 1);
451 GOTO(err_client, rc);
456 class_disconnect_exports(obd);
458 mds_server_free_data(mds);
462 void mds_init_ctxt(struct obd_device *obd, struct vfsmount *mnt)
464 struct mds_obd *mds = &obd->u.mds;
466 mds->mds_vfsmnt = mnt;
467 /* why not mnt->mnt_sb instead of mnt->mnt_root->d_inode->i_sb? */
468 obd->u.obt.obt_sb = mnt->mnt_root->d_inode->i_sb;
470 fsfilt_setup(obd, obd->u.obt.obt_sb);
472 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
473 obd->obd_lvfs_ctxt.pwdmnt = mnt;
474 obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
475 obd->obd_lvfs_ctxt.fs = get_ds();
476 obd->obd_lvfs_ctxt.cb_ops = mds_lvfs_ops;
480 int mds_fs_setup(struct obd_device *obd, struct vfsmount *mnt)
482 struct mds_obd *mds = &obd->u.mds;
483 struct lvfs_run_ctxt saved;
484 struct dentry *dentry;
489 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_FS_SETUP))
492 rc = cleanup_group_info();
496 mds_init_ctxt(obd, mnt);
498 /* setup the directory tree */
499 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
500 dentry = simple_mkdir(current->fs->pwd, "ROOT", 0755, 0);
501 if (IS_ERR(dentry)) {
502 rc = PTR_ERR(dentry);
503 CERROR("cannot create ROOT directory: rc = %d\n", rc);
507 mds->mds_rootfid.id = dentry->d_inode->i_ino;
508 mds->mds_rootfid.generation = dentry->d_inode->i_generation;
509 mds->mds_rootfid.f_type = S_IFDIR;
513 dentry = lookup_one_len("__iopen__", current->fs->pwd,
514 strlen("__iopen__"));
515 if (IS_ERR(dentry)) {
516 rc = PTR_ERR(dentry);
517 CERROR("cannot lookup __iopen__ directory: rc = %d\n", rc);
521 mds->mds_fid_de = dentry;
522 if (!dentry->d_inode || is_bad_inode(dentry->d_inode)) {
524 CERROR("__iopen__ directory has no inode? rc = %d\n", rc);
528 dentry = simple_mkdir(current->fs->pwd, "PENDING", 0777, 1);
529 if (IS_ERR(dentry)) {
530 rc = PTR_ERR(dentry);
531 CERROR("cannot create PENDING directory: rc = %d\n", rc);
534 mds->mds_pending_dir = dentry;
537 dentry = simple_mkdir(current->fs->pwd, MDT_LOGS_DIR, 0777, 1);
538 if (IS_ERR(dentry)) {
539 rc = PTR_ERR(dentry);
540 CERROR("cannot create %s directory: rc = %d\n",
542 GOTO(err_pending, rc);
544 mds->mds_logs_dir = dentry;
547 dentry = simple_mkdir(current->fs->pwd, "OBJECTS", 0777, 1);
548 if (IS_ERR(dentry)) {
549 rc = PTR_ERR(dentry);
550 CERROR("cannot create OBJECTS directory: rc = %d\n", rc);
553 mds->mds_objects_dir = dentry;
555 /* open and test the last rcvd file */
556 file = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644);
559 CERROR("cannot open/create %s file: rc = %d\n", LAST_RCVD, rc);
560 GOTO(err_objects, rc = PTR_ERR(file));
562 mds->mds_rcvd_filp = file;
563 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
564 CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
565 file->f_dentry->d_inode->i_mode);
566 GOTO(err_last_rcvd, rc = -ENOENT);
569 rc = mds_init_server_data(obd, file);
571 CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
572 GOTO(err_last_rcvd, rc);
575 /* open and test the lov objd file */
576 file = filp_open(LOV_OBJID, O_RDWR | O_CREAT, 0644);
579 CERROR("cannot open/create %s file: rc = %d\n", LOV_OBJID, rc);
580 GOTO(err_client, rc = PTR_ERR(file));
582 mds->mds_lov_objid_filp = file;
583 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
584 CERROR("%s is not a regular file!: mode = %o\n", LOV_OBJID,
585 file->f_dentry->d_inode->i_mode);
586 GOTO(err_lov_objid, rc = -ENOENT);
589 /* open and test the check io file junk */
590 file = filp_open(HEALTH_CHECK, O_RDWR | O_CREAT, 0644);
593 CERROR("cannot open/create %s file: rc = %d\n", HEALTH_CHECK,
595 GOTO(err_lov_objid, rc = PTR_ERR(file));
597 mds->mds_health_check_filp = file;
598 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
599 CERROR("%s is not a regular file!: mode = %o\n", HEALTH_CHECK,
600 file->f_dentry->d_inode->i_mode);
601 GOTO(err_health_check, rc = -ENOENT);
603 rc = lvfs_check_io_health(obd, file);
605 GOTO(err_health_check, rc);
607 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
612 if (mds->mds_health_check_filp &&
613 filp_close(mds->mds_health_check_filp, 0))
614 CERROR("can't close %s after error\n", HEALTH_CHECK);
616 if (mds->mds_lov_objid_filp &&
617 filp_close((struct file *)mds->mds_lov_objid_filp, 0))
618 CERROR("can't close %s after error\n", LOV_OBJID);
620 class_disconnect_exports(obd);
622 if (mds->mds_rcvd_filp && filp_close(mds->mds_rcvd_filp, 0))
623 CERROR("can't close %s after error\n", LAST_RCVD);
625 dput(mds->mds_objects_dir);
627 dput(mds->mds_logs_dir);
629 dput(mds->mds_pending_dir);
631 dput(mds->mds_fid_de);
636 int mds_fs_cleanup(struct obd_device *obd)
638 struct mds_obd *mds = &obd->u.mds;
639 struct lvfs_run_ctxt saved;
643 LCONSOLE_WARN("%s: shutting down for failover; client state "
644 "will be preserved.\n", obd->obd_name);
646 class_disconnect_exports(obd); /* cleans up client info too */
647 mds_server_free_data(mds);
649 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
650 if (mds->mds_rcvd_filp) {
651 rc = filp_close(mds->mds_rcvd_filp, 0);
652 mds->mds_rcvd_filp = NULL;
654 CERROR("%s file won't close, rc=%d\n", LAST_RCVD, rc);
656 if (mds->mds_lov_objid_filp) {
657 rc = filp_close((struct file *)mds->mds_lov_objid_filp, 0);
658 mds->mds_lov_objid_filp = NULL;
660 CERROR("%s file won't close, rc=%d\n", LOV_OBJID, rc);
662 if (mds->mds_health_check_filp) {
663 rc = filp_close(mds->mds_health_check_filp, 0);
664 mds->mds_health_check_filp = NULL;
666 CERROR("%s file won't close, rc=%d\n", HEALTH_CHECK,
669 if (mds->mds_objects_dir != NULL) {
670 l_dput(mds->mds_objects_dir);
671 mds->mds_objects_dir = NULL;
673 if (mds->mds_logs_dir) {
674 l_dput(mds->mds_logs_dir);
675 mds->mds_logs_dir = NULL;
677 if (mds->mds_pending_dir) {
678 l_dput(mds->mds_pending_dir);
679 mds->mds_pending_dir = NULL;
682 lquota_fs_cleanup(mds_quota_interface_ref, obd);
684 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
685 shrink_dcache_parent(mds->mds_fid_de);
686 dput(mds->mds_fid_de);
687 LL_DQUOT_OFF(obd->u.obt.obt_sb);
692 /* Creates an object with the same name as its fid. Because this is not at all
693 * performance sensitive, it is accomplished by creating a file, checking the
694 * fid, and renaming it. */
695 int mds_obd_create(struct obd_export *exp, struct obdo *oa,
696 struct lov_stripe_md **ea, struct obd_trans_info *oti)
698 struct mds_obd *mds = &exp->exp_obd->u.mds;
699 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
700 unsigned int tmpname = ll_rand();
702 struct dentry *new_child;
703 struct lvfs_run_ctxt saved;
704 char fidname[LL_FID_NAMELEN];
706 struct lvfs_ucred ucred = { 0 };
707 int rc = 0, err, namelen;
710 /* the owner of object file should always be root */
711 cap_raise(ucred.luc_cap, CAP_SYS_RESOURCE);
713 if (strncmp(exp->exp_obd->obd_name, MDD_OBD_NAME,
714 strlen(MDD_OBD_NAME))) {
718 push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, &ucred);
720 sprintf(fidname, "OBJECTS/%u.%u", tmpname, current->pid);
721 filp = filp_open(fidname, O_CREAT | O_EXCL, 0666);
725 CERROR("impossible object name collision %u\n",
729 CERROR("error creating tmp object %u: rc %d\n", tmpname, rc);
733 LASSERT(mds->mds_objects_dir == filp->f_dentry->d_parent);
735 oa->o_id = filp->f_dentry->d_inode->i_ino;
736 oa->o_generation = filp->f_dentry->d_inode->i_generation;
737 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
739 LOCK_INODE_MUTEX(parent_inode);
740 new_child = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
742 if (IS_ERR(new_child)) {
743 CERROR("getting neg dentry for obj rename: %d\n", rc);
744 GOTO(out_close, rc = PTR_ERR(new_child));
746 if (new_child->d_inode != NULL) {
747 CERROR("impossible non-negative obj dentry " LPU64":%u!\n",
748 oa->o_id, oa->o_generation);
752 handle = fsfilt_start(exp->exp_obd, mds->mds_objects_dir->d_inode,
753 FSFILT_OP_RENAME, NULL);
755 GOTO(out_dput, rc = PTR_ERR(handle));
758 rc = vfs_rename(mds->mds_objects_dir->d_inode, filp->f_dentry,
759 mds->mds_objects_dir->d_inode, new_child);
762 CERROR("error renaming new object "LPU64":%u: rc %d\n",
763 oa->o_id, oa->o_generation, rc);
765 err = fsfilt_commit(exp->exp_obd, mds->mds_objects_dir->d_inode,
768 oa->o_gr = FILTER_GROUP_MDS0 + mds->mds_id;
769 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGENER | OBD_MD_FLGROUP;
775 UNLOCK_INODE_MUTEX(parent_inode);
776 err = filp_close(filp, 0);
778 CERROR("closing tmpfile %u: rc %d\n", tmpname, rc);
783 pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, &ucred);
787 int mds_obd_destroy(struct obd_export *exp, struct obdo *oa,
788 struct lov_stripe_md *ea, struct obd_trans_info *oti,
789 struct obd_export *md_exp)
791 struct mds_obd *mds = &exp->exp_obd->u.mds;
792 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
793 struct obd_device *obd = exp->exp_obd;
794 struct lvfs_run_ctxt saved;
795 struct lvfs_ucred ucred = { 0 };
796 char fidname[LL_FID_NAMELEN];
797 struct inode *inode = NULL;
800 int err, namelen, rc = 0;
803 cap_raise(ucred.luc_cap, CAP_SYS_RESOURCE);
804 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &ucred);
806 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
808 LOCK_INODE_MUTEX(parent_inode);
809 de = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
813 CERROR("error looking up object "LPU64" %s: rc %d\n",
814 oa->o_id, fidname, rc);
817 if (de->d_inode == NULL) {
818 CERROR("destroying non-existent object "LPU64" %s: rc %d\n",
819 oa->o_id, fidname, rc);
820 GOTO(out_dput, rc = -ENOENT);
823 /* Stripe count is 1 here since this is some MDS specific stuff
824 that is unlinked, not spanned across multiple OSTs */
825 handle = fsfilt_start_log(obd, mds->mds_objects_dir->d_inode,
826 FSFILT_OP_UNLINK, oti, 1);
829 GOTO(out_dput, rc = PTR_ERR(handle));
831 /* take a reference to protect inode from truncation within
832 vfs_unlink() context. bug 10409 */
834 atomic_inc(&inode->i_count);
835 rc = vfs_unlink(mds->mds_objects_dir->d_inode, de);
837 CERROR("error destroying object "LPU64":%u: rc %d\n",
838 oa->o_id, oa->o_generation, rc);
840 err = fsfilt_commit(obd, mds->mds_objects_dir->d_inode, handle, 0);
846 UNLOCK_INODE_MUTEX(parent_inode);
851 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &ucred);