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 spin_lock(&exp->exp_lock);
147 exp->exp_need_sync = 1;
148 spin_unlock(&exp->exp_lock);
150 rc = fsfilt_write_record(obd, file, med->med_mcd,
151 sizeof(*med->med_mcd),
152 &off, rc /* sync if no cb */);
153 fsfilt_commit(obd, file->f_dentry->d_inode, handle, 0);
156 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
160 CDEBUG(D_INFO, "wrote client mcd at idx %u off %llu (len %u)\n",
161 med->med_lr_idx, med->med_lr_off,
162 (unsigned int)sizeof(*med->med_mcd));
167 int mds_client_free(struct obd_export *exp)
169 struct mds_export_data *med = &exp->exp_mds_data;
170 struct mds_obd *mds = &exp->exp_obd->u.mds;
171 struct obd_device *obd = exp->exp_obd;
172 struct mds_client_data zero_mcd;
173 struct lvfs_run_ctxt saved;
181 /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
182 if (!strcmp(med->med_mcd->mcd_uuid, obd->obd_uuid.uuid))
185 CDEBUG(D_INFO, "freeing client at idx %u, offset %lld with UUID '%s'\n",
186 med->med_lr_idx, med->med_lr_off, med->med_mcd->mcd_uuid);
188 LASSERT(mds->mds_client_bitmap != NULL);
190 lprocfs_exp_cleanup(exp);
192 off = med->med_lr_off;
194 /* Don't clear med_lr_idx here as it is likely also unset. At worst
195 * we leak a client slot that will be cleaned on the next recovery. */
197 CERROR("%s: client idx %d has offset %lld\n",
198 obd->obd_name, med->med_lr_idx, off);
199 GOTO(free, rc = -EINVAL);
202 /* Clear the bit _after_ zeroing out the client so we don't
203 race with mds_client_add and zero out new clients.*/
204 if (!test_bit(med->med_lr_idx, mds->mds_client_bitmap)) {
205 CERROR("MDS client %u: bit already clear in bitmap!!\n",
210 if (!(exp->exp_flags & OBD_OPT_FAILOVER)) {
211 memset(&zero_mcd, 0, sizeof zero_mcd);
212 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
213 rc = fsfilt_write_record(obd, mds->mds_rcvd_filp, &zero_mcd,
214 sizeof(zero_mcd), &off,
215 (!exp->exp_libclient || 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 = file->f_dentry->d_inode->i_size;
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("Trying to start OBD %s using the wrong"
300 " disk %s. Were the /dev/ assignments "
302 obd->obd_uuid.uuid, lsd->lsd_uuid);
303 GOTO(err_msd, rc = -EINVAL);
306 /* Assume old last_rcvd format unless I_C_LR is set */
307 if (!(lsd->lsd_feature_incompat &
308 cpu_to_le32(OBD_INCOMPAT_COMMON_LR)))
309 lsd->lsd_mount_count = lsd->lsd_compat14;
311 mount_count = le64_to_cpu(lsd->lsd_mount_count);
314 if (lsd->lsd_feature_incompat & ~cpu_to_le32(MDT_INCOMPAT_SUPP)) {
315 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
316 obd->obd_name, le32_to_cpu(lsd->lsd_feature_incompat) &
318 GOTO(err_msd, rc = -EINVAL);
320 if (lsd->lsd_feature_rocompat & ~cpu_to_le32(MDT_ROCOMPAT_SUPP)) {
321 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
322 obd->obd_name, le32_to_cpu(lsd->lsd_feature_rocompat) &
324 /* Do something like remount filesystem read-only */
325 GOTO(err_msd, rc = -EINVAL);
328 lsd->lsd_feature_compat = cpu_to_le32(OBD_COMPAT_MDT);
330 mds->mds_last_transno = le64_to_cpu(lsd->lsd_last_transno);
332 CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
333 obd->obd_name, mds->mds_last_transno);
334 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
335 obd->obd_name, mount_count + 1);
336 CDEBUG(D_INODE, "%s: server data size: %u\n",
337 obd->obd_name, le32_to_cpu(lsd->lsd_server_size));
338 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
339 obd->obd_name, le32_to_cpu(lsd->lsd_client_start));
340 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
341 obd->obd_name, le32_to_cpu(lsd->lsd_client_size));
342 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
343 obd->obd_name, last_rcvd_size);
344 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
345 last_rcvd_size <= le32_to_cpu(lsd->lsd_client_start) ? 0 :
346 (last_rcvd_size - le32_to_cpu(lsd->lsd_client_start)) /
347 le16_to_cpu(lsd->lsd_client_size));
349 if (!lsd->lsd_server_size || !lsd->lsd_client_start ||
350 !lsd->lsd_client_size) {
351 CERROR("Bad last_rcvd contents!\n");
352 GOTO(err_msd, rc = -EINVAL);
355 /* When we do a clean MDS shutdown, we save the last_transno into
356 * the header. If we find clients with higher last_transno values
357 * then those clients may need recovery done. */
358 for (cl_idx = 0, off = le32_to_cpu(lsd->lsd_client_start);
359 off < last_rcvd_size; cl_idx++) {
361 struct obd_export *exp;
362 struct mds_export_data *med;
365 OBD_ALLOC_WAIT(mcd, sizeof(*mcd));
367 GOTO(err_client, rc = -ENOMEM);
370 /* Don't assume off is incremented properly by
371 * fsfilt_read_record(), in case sizeof(*mcd)
372 * isn't the same as lsd->lsd_client_size. */
373 off = le32_to_cpu(lsd->lsd_client_start) +
374 cl_idx * le16_to_cpu(lsd->lsd_client_size);
375 rc = fsfilt_read_record(obd, file, mcd, sizeof(*mcd), &off);
377 CERROR("error reading MDS %s idx %d, off %llu: rc %d\n",
378 LAST_RCVD, cl_idx, off, rc);
379 break; /* read error shouldn't cause startup to fail */
382 if (mcd->mcd_uuid[0] == '\0') {
383 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
388 last_transno = le64_to_cpu(mcd->mcd_last_transno) >
389 le64_to_cpu(mcd->mcd_last_close_transno) ?
390 le64_to_cpu(mcd->mcd_last_transno) :
391 le64_to_cpu(mcd->mcd_last_close_transno);
393 /* These exports are cleaned up by mds_disconnect(), so they
394 * need to be set up like real exports as mds_connect() does.
396 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
397 " srv lr: "LPU64" lx: "LPU64"\n", mcd->mcd_uuid, cl_idx,
398 last_transno, le64_to_cpu(lsd->lsd_last_transno),
399 le64_to_cpu(mcd->mcd_last_xid));
401 exp = class_new_export(obd, (struct obd_uuid *)mcd->mcd_uuid);
403 GOTO(err_client, rc = PTR_ERR(exp));
405 med = &exp->exp_mds_data;
407 rc = mds_client_add(obd, exp, cl_idx);
408 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
413 spin_lock(&exp->exp_lock);
414 exp->exp_replay_needed = 1;
415 exp->exp_connecting = 0;
416 spin_unlock(&exp->exp_lock);
418 obd->obd_recoverable_clients++;
419 obd->obd_max_recoverable_clients++;
420 class_export_put(exp);
422 CDEBUG(D_OTHER, "client at idx %d has last_transno = "LPU64"\n",
423 cl_idx, last_transno);
425 if (last_transno > mds->mds_last_transno)
426 mds->mds_last_transno = last_transno;
430 OBD_FREE(mcd, sizeof(*mcd));
432 obd->obd_last_committed = mds->mds_last_transno;
434 if (obd->obd_recoverable_clients) {
435 CWARN("RECOVERY: service %s, %d recoverable clients, "
436 "last_transno "LPU64"\n", obd->obd_name,
437 obd->obd_recoverable_clients, mds->mds_last_transno);
438 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
439 obd->obd_recovering = 1;
440 obd->obd_recovery_start = CURRENT_SECONDS;
441 /* Only used for lprocfs_status */
442 obd->obd_recovery_end = obd->obd_recovery_start +
443 OBD_RECOVERY_TIMEOUT;
446 mds->mds_mount_count = mount_count + 1;
447 lsd->lsd_mount_count = lsd->lsd_compat14 =
448 cpu_to_le64(mds->mds_mount_count);
450 /* save it, so mount count and last_transno is current */
451 rc = mds_update_server_data(obd, 1);
453 GOTO(err_client, rc);
458 class_disconnect_exports(obd);
460 mds_server_free_data(mds);
464 int mds_fs_setup(struct obd_device *obd, struct vfsmount *mnt)
466 struct mds_obd *mds = &obd->u.mds;
467 struct lvfs_run_ctxt saved;
468 struct dentry *dentry;
473 OBD_FAIL_RETURN(OBD_FAIL_MDS_FS_SETUP, -ENOENT);
475 rc = cleanup_group_info();
479 mds->mds_vfsmnt = mnt;
480 /* why not mnt->mnt_sb instead of mnt->mnt_root->d_inode->i_sb? */
481 obd->u.obt.obt_sb = mnt->mnt_root->d_inode->i_sb;
483 fsfilt_setup(obd, obd->u.obt.obt_sb);
485 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
486 obd->obd_lvfs_ctxt.pwdmnt = mnt;
487 obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
488 obd->obd_lvfs_ctxt.fs = get_ds();
489 obd->obd_lvfs_ctxt.cb_ops = mds_lvfs_ops;
491 /* setup the directory tree */
492 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
493 dentry = simple_mkdir(current->fs->pwd, "ROOT", 0755, 0);
494 if (IS_ERR(dentry)) {
495 rc = PTR_ERR(dentry);
496 CERROR("cannot create ROOT directory: rc = %d\n", rc);
500 mds->mds_rootfid.id = dentry->d_inode->i_ino;
501 mds->mds_rootfid.generation = dentry->d_inode->i_generation;
502 mds->mds_rootfid.f_type = S_IFDIR;
506 dentry = lookup_one_len("__iopen__", current->fs->pwd,
507 strlen("__iopen__"));
508 if (IS_ERR(dentry)) {
509 rc = PTR_ERR(dentry);
510 CERROR("cannot lookup __iopen__ directory: rc = %d\n", rc);
514 mds->mds_fid_de = dentry;
515 if (!dentry->d_inode || is_bad_inode(dentry->d_inode)) {
517 CERROR("__iopen__ directory has no inode? rc = %d\n", rc);
521 dentry = simple_mkdir(current->fs->pwd, "PENDING", 0777, 1);
522 if (IS_ERR(dentry)) {
523 rc = PTR_ERR(dentry);
524 CERROR("cannot create PENDING directory: rc = %d\n", rc);
527 mds->mds_pending_dir = dentry;
530 dentry = simple_mkdir(current->fs->pwd, MDT_LOGS_DIR, 0777, 1);
531 if (IS_ERR(dentry)) {
532 rc = PTR_ERR(dentry);
533 CERROR("cannot create %s directory: rc = %d\n",
535 GOTO(err_pending, rc);
537 mds->mds_logs_dir = dentry;
540 dentry = simple_mkdir(current->fs->pwd, "OBJECTS", 0777, 1);
541 if (IS_ERR(dentry)) {
542 rc = PTR_ERR(dentry);
543 CERROR("cannot create OBJECTS directory: rc = %d\n", rc);
546 mds->mds_objects_dir = dentry;
548 /* open and test the last rcvd file */
549 file = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644);
552 CERROR("cannot open/create %s file: rc = %d\n", LAST_RCVD, rc);
553 GOTO(err_objects, rc = PTR_ERR(file));
555 mds->mds_rcvd_filp = file;
556 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
557 CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
558 file->f_dentry->d_inode->i_mode);
559 GOTO(err_last_rcvd, rc = -ENOENT);
562 rc = mds_init_server_data(obd, file);
564 CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
565 GOTO(err_last_rcvd, rc);
568 /* open and test the lov objd file */
569 file = filp_open(LOV_OBJID, O_RDWR | O_CREAT, 0644);
572 CERROR("cannot open/create %s file: rc = %d\n", LOV_OBJID, rc);
573 GOTO(err_client, rc = PTR_ERR(file));
575 mds->mds_lov_objid_filp = file;
576 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
577 CERROR("%s is not a regular file!: mode = %o\n", LOV_OBJID,
578 file->f_dentry->d_inode->i_mode);
579 GOTO(err_lov_objid, rc = -ENOENT);
582 /* open and test the check io file junk */
583 file = filp_open(HEALTH_CHECK, O_RDWR | O_CREAT, 0644);
586 CERROR("cannot open/create %s file: rc = %d\n", HEALTH_CHECK, rc);
587 GOTO(err_lov_objid, rc = PTR_ERR(file));
589 mds->mds_health_check_filp = file;
590 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
591 CERROR("%s is not a regular file!: mode = %o\n", HEALTH_CHECK,
592 file->f_dentry->d_inode->i_mode);
593 GOTO(err_health_check, rc = -ENOENT);
595 rc = lvfs_check_io_health(obd, file);
597 GOTO(err_health_check, rc);
599 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
604 if (mds->mds_health_check_filp &&
605 filp_close(mds->mds_health_check_filp, 0))
606 CERROR("can't close %s after error\n", HEALTH_CHECK);
608 if (mds->mds_lov_objid_filp && filp_close(mds->mds_lov_objid_filp, 0))
609 CERROR("can't close %s after error\n", LOV_OBJID);
611 class_disconnect_exports(obd);
613 if (mds->mds_rcvd_filp && filp_close(mds->mds_rcvd_filp, 0))
614 CERROR("can't close %s after error\n", LAST_RCVD);
616 dput(mds->mds_objects_dir);
618 dput(mds->mds_logs_dir);
620 dput(mds->mds_pending_dir);
622 dput(mds->mds_fid_de);
627 int mds_fs_cleanup(struct obd_device *obd)
629 struct mds_obd *mds = &obd->u.mds;
630 struct lvfs_run_ctxt saved;
634 LCONSOLE_WARN("%s: shutting down for failover; client state "
635 "will be preserved.\n", obd->obd_name);
637 class_disconnect_exports(obd); /* cleans up client info too */
638 mds_server_free_data(mds);
640 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
641 if (mds->mds_rcvd_filp) {
642 rc = filp_close(mds->mds_rcvd_filp, 0);
643 mds->mds_rcvd_filp = NULL;
645 CERROR("%s file won't close, rc=%d\n", LAST_RCVD, rc);
647 if (mds->mds_lov_objid_filp) {
648 rc = filp_close(mds->mds_lov_objid_filp, 0);
649 mds->mds_lov_objid_filp = NULL;
651 CERROR("%s file won't close, rc=%d\n", LOV_OBJID, rc);
653 if (mds->mds_health_check_filp) {
654 rc = filp_close(mds->mds_health_check_filp, 0);
655 mds->mds_health_check_filp = NULL;
657 CERROR("%s file won't close, rc=%d\n", HEALTH_CHECK, rc);
659 if (mds->mds_objects_dir != NULL) {
660 l_dput(mds->mds_objects_dir);
661 mds->mds_objects_dir = NULL;
663 if (mds->mds_logs_dir) {
664 l_dput(mds->mds_logs_dir);
665 mds->mds_logs_dir = NULL;
667 if (mds->mds_pending_dir) {
668 l_dput(mds->mds_pending_dir);
669 mds->mds_pending_dir = NULL;
672 lquota_fs_cleanup(mds_quota_interface_ref, obd);
674 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
675 shrink_dcache_parent(mds->mds_fid_de);
676 dput(mds->mds_fid_de);
677 LL_DQUOT_OFF(obd->u.obt.obt_sb);
682 /* Creates an object with the same name as its fid. Because this is not at all
683 * performance sensitive, it is accomplished by creating a file, checking the
684 * fid, and renaming it. */
685 int mds_obd_create(struct obd_export *exp, struct obdo *oa,
686 struct lov_stripe_md **ea, struct obd_trans_info *oti)
688 struct mds_obd *mds = &exp->exp_obd->u.mds;
689 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
690 unsigned int tmpname = ll_rand();
692 struct dentry *new_child;
693 struct lvfs_run_ctxt saved;
694 char fidname[LL_FID_NAMELEN];
696 struct lvfs_ucred ucred = { 0 };
697 int rc = 0, err, namelen;
700 /* the owner of object file should always be root */
701 ucred.luc_cap = current->cap_effective | CAP_SYS_RESOURCE;
703 push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, &ucred);
705 sprintf(fidname, "OBJECTS/%u.%u", tmpname, current->pid);
706 filp = filp_open(fidname, O_CREAT | O_EXCL, 0666);
710 CERROR("impossible object name collision %u\n",
714 CERROR("error creating tmp object %u: rc %d\n", tmpname, rc);
718 LASSERT(mds->mds_objects_dir == filp->f_dentry->d_parent);
720 oa->o_id = filp->f_dentry->d_inode->i_ino;
721 oa->o_generation = filp->f_dentry->d_inode->i_generation;
722 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
724 LOCK_INODE_MUTEX(parent_inode);
725 new_child = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
727 if (IS_ERR(new_child)) {
728 CERROR("getting neg dentry for obj rename: %d\n", rc);
729 GOTO(out_close, rc = PTR_ERR(new_child));
731 if (new_child->d_inode != NULL) {
732 CERROR("impossible non-negative obj dentry " LPU64":%u!\n",
733 oa->o_id, oa->o_generation);
737 handle = fsfilt_start(exp->exp_obd, mds->mds_objects_dir->d_inode,
738 FSFILT_OP_RENAME, NULL);
740 GOTO(out_dput, rc = PTR_ERR(handle));
743 rc = vfs_rename(mds->mds_objects_dir->d_inode, filp->f_dentry,
744 mds->mds_objects_dir->d_inode, new_child);
747 CERROR("error renaming new object "LPU64":%u: rc %d\n",
748 oa->o_id, oa->o_generation, rc);
750 err = fsfilt_commit(exp->exp_obd, mds->mds_objects_dir->d_inode,
753 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGENER;
759 UNLOCK_INODE_MUTEX(parent_inode);
760 err = filp_close(filp, 0);
762 CERROR("closing tmpfile %u: rc %d\n", tmpname, rc);
767 pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, &ucred);
771 int mds_obd_destroy(struct obd_export *exp, struct obdo *oa,
772 struct lov_stripe_md *ea, struct obd_trans_info *oti,
773 struct obd_export *md_exp)
775 struct mds_obd *mds = &exp->exp_obd->u.mds;
776 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
777 struct obd_device *obd = exp->exp_obd;
778 struct lvfs_run_ctxt saved;
779 struct lvfs_ucred ucred = { 0 };
780 char fidname[LL_FID_NAMELEN];
781 struct inode *inode = NULL;
784 int err, namelen, rc = 0;
787 ucred.luc_cap = current->cap_effective | CAP_SYS_RESOURCE;
788 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &ucred);
790 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
792 LOCK_INODE_MUTEX(parent_inode);
793 de = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
797 CERROR("error looking up object "LPU64" %s: rc %d\n",
798 oa->o_id, fidname, rc);
801 if (de->d_inode == NULL) {
802 CERROR("destroying non-existent object "LPU64" %s: rc %d\n",
803 oa->o_id, fidname, rc);
804 GOTO(out_dput, rc = -ENOENT);
807 /* Stripe count is 1 here since this is some MDS specific stuff
808 that is unlinked, not spanned across multiple OSTs */
809 handle = fsfilt_start_log(obd, mds->mds_objects_dir->d_inode,
810 FSFILT_OP_UNLINK, oti, 1);
813 GOTO(out_dput, rc = PTR_ERR(handle));
815 /* take a reference to protect inode from truncation within
816 vfs_unlink() context. bug 10409 */
818 atomic_inc(&inode->i_count);
819 rc = vfs_unlink(mds->mds_objects_dir->d_inode, de);
821 CERROR("error destroying object "LPU64":%u: rc %d\n",
822 oa->o_id, oa->o_generation, rc);
824 err = fsfilt_commit(obd, mds->mds_objects_dir->d_inode, handle, 0);
830 UNLOCK_INODE_MUTEX(parent_inode);
835 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &ucred);