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_dt_ops) / sizeof(void *)) +
62 exp->exp_ops_stats = lprocfs_alloc_stats(num_stats,
63 LPROCFS_STATS_FLAG_NOPERCPU);
64 if (exp->exp_ops_stats == NULL)
66 lprocfs_init_ops_stats(LPROC_MDS_LAST, exp->exp_ops_stats);
67 mds_stats_counter_init(exp->exp_ops_stats);
68 lprocfs_register_stats(exp->exp_proc, "stats", exp->exp_ops_stats);
72 /* Add client data to the MDS. We use a bitmap to locate a free space
73 * in the last_rcvd file if cl_off is -1 (i.e. a new client).
74 * Otherwise, we have just read the data from the last_rcvd file and
77 * It should not be possible to fail adding an existing client - otherwise
78 * mds_init_server_data() callsite needs to be fixed.
80 int mds_client_add(struct obd_device *obd, struct obd_export *exp,
83 struct mds_obd *mds = &obd->u.mds;
84 struct mds_export_data *med = &exp->exp_mds_data;
85 unsigned long *bitmap = mds->mds_client_bitmap;
86 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 client - 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;
137 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
138 handle = fsfilt_start(obd, file->f_dentry->d_inode,
139 FSFILT_OP_SETATTR, NULL);
140 if (IS_ERR(handle)) {
141 rc = PTR_ERR(handle);
142 CERROR("unable to start transaction: rc %d\n", rc);
144 rc = fsfilt_add_journal_cb(obd, 0, handle,
145 target_client_add_cb, exp);
147 spin_lock(&exp->exp_lock);
148 exp->exp_need_sync = 1;
149 spin_unlock(&exp->exp_lock);
151 rc = fsfilt_write_record(obd, file, med->med_mcd,
152 sizeof(*med->med_mcd),
153 &off, rc /* sync if no cb */);
154 fsfilt_commit(obd, file->f_dentry->d_inode, handle, 0);
157 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
161 CDEBUG(D_INFO, "wrote client mcd at idx %u off %llu (len %u)\n",
162 med->med_lr_idx, med->med_lr_off,
163 (unsigned int)sizeof(*med->med_mcd));
168 int mds_client_free(struct obd_export *exp)
170 struct mds_export_data *med = &exp->exp_mds_data;
171 struct mds_obd *mds = &exp->exp_obd->u.mds;
172 struct obd_device *obd = exp->exp_obd;
173 struct mds_client_data zero_mcd;
174 struct lvfs_run_ctxt saved;
182 /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
183 if (!strcmp(med->med_mcd->mcd_uuid, obd->obd_uuid.uuid))
186 CDEBUG(D_INFO, "freeing client at idx %u, offset %lld with UUID '%s'\n",
187 med->med_lr_idx, med->med_lr_off, med->med_mcd->mcd_uuid);
189 LASSERT(mds->mds_client_bitmap != NULL);
191 lprocfs_exp_cleanup(exp);
193 off = med->med_lr_off;
195 /* Don't clear med_lr_idx here as it is likely also unset. At worst
196 * we leak a client slot that will be cleaned on the next recovery. */
198 CERROR("%s: client idx %d has offset %lld\n",
199 obd->obd_name, med->med_lr_idx, off);
200 GOTO(free, rc = -EINVAL);
203 /* Clear the bit _after_ zeroing out the client so we don't
204 race with mds_client_add and zero out new clients.*/
205 if (!test_bit(med->med_lr_idx, mds->mds_client_bitmap)) {
206 CERROR("MDS client %u: bit already clear in bitmap!!\n",
211 if (!(exp->exp_flags & OBD_OPT_FAILOVER)) {
212 memset(&zero_mcd, 0, sizeof zero_mcd);
213 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
214 rc = fsfilt_write_record(obd, mds->mds_rcvd_filp, &zero_mcd,
215 sizeof(zero_mcd), &off,
216 (!exp->exp_libclient ||
217 exp->exp_need_sync));
218 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
220 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
221 "zeroing out client %s idx %u in %s rc %d\n",
222 med->med_mcd->mcd_uuid, med->med_lr_idx, LAST_RCVD, rc);
225 if (!test_and_clear_bit(med->med_lr_idx, mds->mds_client_bitmap)) {
226 CERROR("MDS client %u: bit already clear in bitmap!!\n",
232 /* Make sure the server's last_transno is up to date. Do this
233 * after the client is freed so we know all the client's
234 * transactions have been committed. */
235 mds_update_server_data(exp->exp_obd, 0);
239 OBD_FREE(med->med_mcd, sizeof(*med->med_mcd));
245 static int mds_server_free_data(struct mds_obd *mds)
247 OBD_FREE(mds->mds_client_bitmap, LR_MAX_CLIENTS / 8);
248 OBD_FREE(mds->mds_server_data, sizeof(*mds->mds_server_data));
249 mds->mds_server_data = NULL;
254 static int mds_init_server_data(struct obd_device *obd, struct file *file)
256 struct mds_obd *mds = &obd->u.mds;
257 struct lr_server_data *lsd;
258 struct mds_client_data *mcd = NULL;
260 unsigned long last_rcvd_size = i_size_read(file->f_dentry->d_inode);
265 /* ensure padding in the struct is the correct size */
266 LASSERT(offsetof(struct lr_server_data, lsd_padding) +
267 sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
268 LASSERT(offsetof(struct mds_client_data, mcd_padding) +
269 sizeof(mcd->mcd_padding) == LR_CLIENT_SIZE);
271 OBD_ALLOC_WAIT(lsd, sizeof(*lsd));
275 OBD_ALLOC_WAIT(mds->mds_client_bitmap, LR_MAX_CLIENTS / 8);
276 if (!mds->mds_client_bitmap) {
277 OBD_FREE(lsd, sizeof(*lsd));
281 mds->mds_server_data = lsd;
283 if (last_rcvd_size == 0) {
284 LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name);
286 memcpy(lsd->lsd_uuid, obd->obd_uuid.uuid,sizeof(lsd->lsd_uuid));
287 lsd->lsd_last_transno = 0;
288 mount_count = lsd->lsd_mount_count = 0;
289 lsd->lsd_server_size = cpu_to_le32(LR_SERVER_SIZE);
290 lsd->lsd_client_start = cpu_to_le32(LR_CLIENT_START);
291 lsd->lsd_client_size = cpu_to_le16(LR_CLIENT_SIZE);
292 lsd->lsd_feature_rocompat = cpu_to_le32(OBD_ROCOMPAT_LOVOBJID);
293 lsd->lsd_feature_incompat = cpu_to_le32(OBD_INCOMPAT_MDT);
295 rc = fsfilt_read_record(obd, file, lsd, sizeof(*lsd), &off);
297 CERROR("error reading MDS %s: rc %d\n", LAST_RCVD, rc);
300 if (strcmp(lsd->lsd_uuid, obd->obd_uuid.uuid) != 0) {
301 LCONSOLE_ERROR_MSG(0x157, "Trying to start OBD %s "
302 "using the wrong disk %s. Were the "
303 "/dev/ assignments rearranged?\n",
304 obd->obd_uuid.uuid, lsd->lsd_uuid);
305 GOTO(err_msd, rc = -EINVAL);
307 mount_count = le64_to_cpu(lsd->lsd_mount_count);
310 if (lsd->lsd_feature_incompat & ~cpu_to_le32(MDT_INCOMPAT_SUPP)) {
311 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
312 obd->obd_name, le32_to_cpu(lsd->lsd_feature_incompat) &
314 GOTO(err_msd, rc = -EINVAL);
316 if (lsd->lsd_feature_rocompat & ~cpu_to_le32(MDT_ROCOMPAT_SUPP)) {
317 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
318 obd->obd_name, le32_to_cpu(lsd->lsd_feature_rocompat) &
320 /* Do something like remount filesystem read-only */
321 GOTO(err_msd, rc = -EINVAL);
324 lsd->lsd_feature_compat = cpu_to_le32(OBD_COMPAT_MDT);
326 mds->mds_last_transno = le64_to_cpu(lsd->lsd_last_transno);
328 CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
329 obd->obd_name, mds->mds_last_transno);
330 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
331 obd->obd_name, mount_count + 1);
332 CDEBUG(D_INODE, "%s: server data size: %u\n",
333 obd->obd_name, le32_to_cpu(lsd->lsd_server_size));
334 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
335 obd->obd_name, le32_to_cpu(lsd->lsd_client_start));
336 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
337 obd->obd_name, le32_to_cpu(lsd->lsd_client_size));
338 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
339 obd->obd_name, last_rcvd_size);
340 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
341 last_rcvd_size <= le32_to_cpu(lsd->lsd_client_start) ? 0 :
342 (last_rcvd_size - le32_to_cpu(lsd->lsd_client_start)) /
343 le16_to_cpu(lsd->lsd_client_size));
345 if (!lsd->lsd_server_size || !lsd->lsd_client_start ||
346 !lsd->lsd_client_size) {
347 CERROR("Bad last_rcvd contents!\n");
348 GOTO(err_msd, rc = -EINVAL);
351 /* When we do a clean MDS shutdown, we save the last_transno into
352 * the header. If we find clients with higher last_transno values
353 * then those clients may need recovery done. */
354 for (cl_idx = 0, off = le32_to_cpu(lsd->lsd_client_start);
355 off < last_rcvd_size; cl_idx++) {
357 struct obd_export *exp;
358 struct mds_export_data *med;
361 OBD_ALLOC_WAIT(mcd, sizeof(*mcd));
363 GOTO(err_client, rc = -ENOMEM);
366 /* Don't assume off is incremented properly by
367 * fsfilt_read_record(), in case sizeof(*mcd)
368 * isn't the same as lsd->lsd_client_size. */
369 off = le32_to_cpu(lsd->lsd_client_start) +
370 cl_idx * le16_to_cpu(lsd->lsd_client_size);
371 rc = fsfilt_read_record(obd, file, mcd, sizeof(*mcd), &off);
373 CERROR("error reading MDS %s idx %d, off %llu: rc %d\n",
374 LAST_RCVD, cl_idx, off, rc);
375 break; /* read error shouldn't cause startup to fail */
378 if (mcd->mcd_uuid[0] == '\0') {
379 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
384 last_transno = le64_to_cpu(mcd->mcd_last_transno) >
385 le64_to_cpu(mcd->mcd_last_close_transno) ?
386 le64_to_cpu(mcd->mcd_last_transno) :
387 le64_to_cpu(mcd->mcd_last_close_transno);
389 /* These exports are cleaned up by mds_disconnect(), so they
390 * need to be set up like real exports as mds_connect() does.
392 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
393 " srv lr: "LPU64" lx: "LPU64"\n", mcd->mcd_uuid, cl_idx,
394 last_transno, le64_to_cpu(lsd->lsd_last_transno),
395 le64_to_cpu(mcd->mcd_last_xid));
397 exp = class_new_export(obd, (struct obd_uuid *)mcd->mcd_uuid);
399 if (PTR_ERR(exp) == -EALREADY) {
400 /* export already exists, zero out this one */
401 mcd->mcd_uuid[0] = '\0';
403 GOTO(err_client, rc = PTR_ERR(exp));
406 med = &exp->exp_mds_data;
408 rc = mds_client_add(obd, exp, cl_idx);
409 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
412 spin_lock(&exp->exp_lock);
413 exp->exp_req_replay_needed = 1;
414 exp->exp_connecting = 0;
415 spin_unlock(&exp->exp_lock);
416 obd->obd_max_recoverable_clients++;
417 class_export_put(exp);
419 /* Need to check last_rcvd even for duplicated exports. */
420 CDEBUG(D_OTHER, "client at idx %d has last_transno = "LPU64"\n",
421 cl_idx, last_transno);
423 if (last_transno > mds->mds_last_transno)
424 mds->mds_last_transno = last_transno;
428 OBD_FREE(mcd, sizeof(*mcd));
430 obd->obd_last_committed = mds->mds_last_transno;
432 if (obd->obd_max_recoverable_clients) {
433 /* shouldn't happen in b_new_cmd */
435 CWARN("RECOVERY: service %s, %d recoverable clients, "
436 "last_transno "LPU64"\n", obd->obd_name,
437 obd->obd_max_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 void mds_init_ctxt(struct obd_device *obd, struct vfsmount *mnt)
466 struct mds_obd *mds = &obd->u.mds;
468 mds->mds_vfsmnt = mnt;
469 /* why not mnt->mnt_sb instead of mnt->mnt_root->d_inode->i_sb? */
470 obd->u.obt.obt_sb = mnt->mnt_root->d_inode->i_sb;
472 fsfilt_setup(obd, obd->u.obt.obt_sb);
474 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
475 obd->obd_lvfs_ctxt.pwdmnt = mnt;
476 obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
477 obd->obd_lvfs_ctxt.fs = get_ds();
478 obd->obd_lvfs_ctxt.cb_ops = mds_lvfs_ops;
482 int mds_fs_setup(struct obd_device *obd, struct vfsmount *mnt)
484 struct mds_obd *mds = &obd->u.mds;
485 struct lvfs_run_ctxt saved;
486 struct dentry *dentry;
491 OBD_FAIL_RETURN(OBD_FAIL_MDS_FS_SETUP, -ENOENT);
493 rc = cleanup_group_info();
497 mds_init_ctxt(obd, mnt);
499 /* setup the directory tree */
500 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
501 dentry = simple_mkdir(current->fs->pwd, "ROOT", 0755, 0);
502 if (IS_ERR(dentry)) {
503 rc = PTR_ERR(dentry);
504 CERROR("cannot create ROOT directory: rc = %d\n", rc);
508 mds->mds_rootfid.id = dentry->d_inode->i_ino;
509 mds->mds_rootfid.generation = dentry->d_inode->i_generation;
510 mds->mds_rootfid.f_type = S_IFDIR;
514 dentry = lookup_one_len("__iopen__", current->fs->pwd,
515 strlen("__iopen__"));
516 if (IS_ERR(dentry)) {
517 rc = PTR_ERR(dentry);
518 CERROR("cannot lookup __iopen__ directory: rc = %d\n", rc);
522 mds->mds_fid_de = dentry;
523 if (!dentry->d_inode || is_bad_inode(dentry->d_inode)) {
525 CERROR("__iopen__ directory has no inode? rc = %d\n", rc);
529 dentry = simple_mkdir(current->fs->pwd, "PENDING", 0777, 1);
530 if (IS_ERR(dentry)) {
531 rc = PTR_ERR(dentry);
532 CERROR("cannot create PENDING directory: rc = %d\n", rc);
535 mds->mds_pending_dir = dentry;
538 dentry = simple_mkdir(current->fs->pwd, MDT_LOGS_DIR, 0777, 1);
539 if (IS_ERR(dentry)) {
540 rc = PTR_ERR(dentry);
541 CERROR("cannot create %s directory: rc = %d\n",
543 GOTO(err_pending, rc);
545 mds->mds_logs_dir = dentry;
548 dentry = simple_mkdir(current->fs->pwd, "OBJECTS", 0777, 1);
549 if (IS_ERR(dentry)) {
550 rc = PTR_ERR(dentry);
551 CERROR("cannot create OBJECTS directory: rc = %d\n", rc);
554 mds->mds_objects_dir = dentry;
556 /* open and test the last rcvd file */
557 file = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644);
560 CERROR("cannot open/create %s file: rc = %d\n", LAST_RCVD, rc);
561 GOTO(err_objects, rc = PTR_ERR(file));
563 mds->mds_rcvd_filp = file;
564 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
565 CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
566 file->f_dentry->d_inode->i_mode);
567 GOTO(err_last_rcvd, rc = -ENOENT);
570 rc = mds_init_server_data(obd, file);
572 CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
573 GOTO(err_last_rcvd, rc);
576 /* open and test the lov objd file */
577 file = filp_open(LOV_OBJID, O_RDWR | O_CREAT, 0644);
580 CERROR("cannot open/create %s file: rc = %d\n", LOV_OBJID, rc);
581 GOTO(err_client, rc = PTR_ERR(file));
583 mds->mds_lov_objid_filp = file;
584 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
585 CERROR("%s is not a regular file!: mode = %o\n", LOV_OBJID,
586 file->f_dentry->d_inode->i_mode);
587 GOTO(err_lov_objid, rc = -ENOENT);
590 /* open and test the check io file junk */
591 file = filp_open(HEALTH_CHECK, O_RDWR | O_CREAT, 0644);
594 CERROR("cannot open/create %s file: rc = %d\n", HEALTH_CHECK,
596 GOTO(err_lov_objid, rc = PTR_ERR(file));
598 mds->mds_health_check_filp = file;
599 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
600 CERROR("%s is not a regular file!: mode = %o\n", HEALTH_CHECK,
601 file->f_dentry->d_inode->i_mode);
602 GOTO(err_health_check, rc = -ENOENT);
604 rc = lvfs_check_io_health(obd, file);
606 GOTO(err_health_check, rc);
608 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
613 if (mds->mds_health_check_filp &&
614 filp_close(mds->mds_health_check_filp, 0))
615 CERROR("can't close %s after error\n", HEALTH_CHECK);
617 if (mds->mds_lov_objid_filp &&
618 filp_close((struct file *)mds->mds_lov_objid_filp, 0))
619 CERROR("can't close %s after error\n", LOV_OBJID);
621 class_disconnect_exports(obd);
623 if (mds->mds_rcvd_filp && filp_close(mds->mds_rcvd_filp, 0))
624 CERROR("can't close %s after error\n", LAST_RCVD);
626 dput(mds->mds_objects_dir);
628 dput(mds->mds_logs_dir);
630 dput(mds->mds_pending_dir);
632 dput(mds->mds_fid_de);
637 int mds_fs_cleanup(struct obd_device *obd)
639 struct mds_obd *mds = &obd->u.mds;
640 struct lvfs_run_ctxt saved;
644 LCONSOLE_WARN("%s: shutting down for failover; client state "
645 "will be preserved.\n", obd->obd_name);
647 class_disconnect_exports(obd); /* cleans up client info too */
648 mds_server_free_data(mds);
650 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
651 if (mds->mds_rcvd_filp) {
652 rc = filp_close(mds->mds_rcvd_filp, 0);
653 mds->mds_rcvd_filp = NULL;
655 CERROR("%s file won't close, rc=%d\n", LAST_RCVD, rc);
657 if (mds->mds_lov_objid_filp) {
658 rc = filp_close((struct file *)mds->mds_lov_objid_filp, 0);
659 mds->mds_lov_objid_filp = NULL;
661 CERROR("%s file won't close, rc=%d\n", LOV_OBJID, rc);
663 if (mds->mds_health_check_filp) {
664 rc = filp_close(mds->mds_health_check_filp, 0);
665 mds->mds_health_check_filp = NULL;
667 CERROR("%s file won't close, rc=%d\n", HEALTH_CHECK,
670 if (mds->mds_objects_dir != NULL) {
671 l_dput(mds->mds_objects_dir);
672 mds->mds_objects_dir = NULL;
674 if (mds->mds_logs_dir) {
675 l_dput(mds->mds_logs_dir);
676 mds->mds_logs_dir = NULL;
678 if (mds->mds_pending_dir) {
679 l_dput(mds->mds_pending_dir);
680 mds->mds_pending_dir = NULL;
683 lquota_fs_cleanup(mds_quota_interface_ref, obd);
685 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
686 shrink_dcache_parent(mds->mds_fid_de);
687 dput(mds->mds_fid_de);
688 LL_DQUOT_OFF(obd->u.obt.obt_sb);
693 /* Creates an object with the same name as its fid. Because this is not at all
694 * performance sensitive, it is accomplished by creating a file, checking the
695 * fid, and renaming it. */
696 int mds_obd_create(struct obd_export *exp, struct obdo *oa,
697 struct lov_stripe_md **ea, struct obd_trans_info *oti)
699 struct mds_obd *mds = &exp->exp_obd->u.mds;
700 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
701 unsigned int tmpname = ll_rand();
703 struct dentry *new_child;
704 struct lvfs_run_ctxt saved;
705 char fidname[LL_FID_NAMELEN];
707 struct lvfs_ucred ucred = { 0 };
708 int rc = 0, err, namelen;
711 /* the owner of object file should always be root */
712 cap_raise(ucred.luc_cap, CAP_SYS_RESOURCE);
714 if (strncmp(exp->exp_obd->obd_name, MDD_OBD_NAME,
715 strlen(MDD_OBD_NAME))) {
719 push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, &ucred);
721 sprintf(fidname, "OBJECTS/%u.%u", tmpname, current->pid);
722 filp = filp_open(fidname, O_CREAT | O_EXCL, 0666);
726 CERROR("impossible object name collision %u\n",
730 CERROR("error creating tmp object %u: rc %d\n", tmpname, rc);
734 LASSERT(mds->mds_objects_dir == filp->f_dentry->d_parent);
736 oa->o_id = filp->f_dentry->d_inode->i_ino;
737 oa->o_generation = filp->f_dentry->d_inode->i_generation;
738 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
740 LOCK_INODE_MUTEX(parent_inode);
741 new_child = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
743 if (IS_ERR(new_child)) {
744 CERROR("getting neg dentry for obj rename: %d\n", rc);
745 GOTO(out_close, rc = PTR_ERR(new_child));
747 if (new_child->d_inode != NULL) {
748 CERROR("impossible non-negative obj dentry " LPU64":%u!\n",
749 oa->o_id, oa->o_generation);
753 handle = fsfilt_start(exp->exp_obd, mds->mds_objects_dir->d_inode,
754 FSFILT_OP_RENAME, NULL);
756 GOTO(out_dput, rc = PTR_ERR(handle));
759 rc = vfs_rename(mds->mds_objects_dir->d_inode, filp->f_dentry,
760 mds->mds_objects_dir->d_inode, new_child);
763 CERROR("error renaming new object "LPU64":%u: rc %d\n",
764 oa->o_id, oa->o_generation, rc);
766 err = fsfilt_commit(exp->exp_obd, mds->mds_objects_dir->d_inode,
769 oa->o_gr = FILTER_GROUP_MDS0 + mds->mds_id;
770 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGENER | OBD_MD_FLGROUP;
776 UNLOCK_INODE_MUTEX(parent_inode);
777 err = filp_close(filp, 0);
779 CERROR("closing tmpfile %u: rc %d\n", tmpname, rc);
784 pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, &ucred);
788 int mds_obd_destroy(struct obd_export *exp, struct obdo *oa,
789 struct lov_stripe_md *ea, struct obd_trans_info *oti,
790 struct obd_export *md_exp)
792 struct mds_obd *mds = &exp->exp_obd->u.mds;
793 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
794 struct obd_device *obd = exp->exp_obd;
795 struct lvfs_run_ctxt saved;
796 struct lvfs_ucred ucred = { 0 };
797 char fidname[LL_FID_NAMELEN];
798 struct inode *inode = NULL;
801 int err, namelen, rc = 0;
804 cap_raise(ucred.luc_cap, CAP_SYS_RESOURCE);
805 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &ucred);
807 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
809 LOCK_INODE_MUTEX(parent_inode);
810 de = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
814 CERROR("error looking up object "LPU64" %s: rc %d\n",
815 oa->o_id, fidname, rc);
818 if (de->d_inode == NULL) {
819 CERROR("destroying non-existent object "LPU64" %s: rc %d\n",
820 oa->o_id, fidname, rc);
821 GOTO(out_dput, rc = -ENOENT);
824 /* Stripe count is 1 here since this is some MDS specific stuff
825 that is unlinked, not spanned across multiple OSTs */
826 handle = fsfilt_start_log(obd, mds->mds_objects_dir->d_inode,
827 FSFILT_OP_UNLINK, oti, 1);
830 GOTO(out_dput, rc = PTR_ERR(handle));
832 /* take a reference to protect inode from truncation within
833 vfs_unlink() context. bug 10409 */
835 atomic_inc(&inode->i_count);
836 rc = vfs_unlink(mds->mds_objects_dir->d_inode, de);
838 CERROR("error destroying object "LPU64":%u: rc %d\n",
839 oa->o_id, oa->o_generation, rc);
841 err = fsfilt_commit(obd, mds->mds_objects_dir->d_inode, handle, 0);
847 UNLOCK_INODE_MUTEX(parent_inode);
852 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &ucred);