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 Lustre, http://www.lustre.org.
12 * Lustre is free software; you can redistribute it and/or
13 * modify it under the terms of version 2 of the GNU General Public
14 * License as published by the Free Software Foundation.
16 * Lustre is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with Lustre; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 # define EXPORT_SYMTAB
29 #define DEBUG_SUBSYSTEM S_MDS
31 #include <linux/module.h>
32 #include <linux/kmod.h>
33 #include <linux/version.h>
34 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
35 #include <linux/mount.h>
37 #include <linux/lustre_mds.h>
38 #include <linux/obd_class.h>
39 #include <linux/obd_support.h>
40 #include <linux/lustre_lib.h>
41 #include <linux/lustre_fsfilt.h>
42 #include <portals/list.h>
44 #include "mds_internal.h"
46 /* This limit is arbitrary, but for now we fit it in 1 page (32k clients) */
47 #define MDS_MAX_CLIENTS (PAGE_SIZE * 8)
48 #define MDS_MAX_CLIENT_WORDS (MDS_MAX_CLIENTS / sizeof(unsigned long))
50 #define LAST_RCVD "last_rcvd"
51 #define LOV_OBJID "lov_objid"
53 /* Add client data to the MDS. We use a bitmap to locate a free space
54 * in the last_rcvd file if cl_off is -1 (i.e. a new client).
55 * Otherwise, we have just read the data from the last_rcvd file and
58 int mds_client_add(struct obd_device *obd, struct mds_obd *mds,
59 struct mds_export_data *med, int cl_idx)
61 unsigned long *bitmap = mds->mds_client_bitmap;
62 int new_client = (cl_idx == -1);
65 LASSERT(bitmap != NULL);
67 /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
68 if (!strcmp(med->med_mcd->mcd_uuid, obd->obd_uuid.uuid))
71 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
72 * there's no need for extra complication here
75 cl_idx = find_first_zero_bit(bitmap, MDS_MAX_CLIENTS);
77 if (cl_idx >= MDS_MAX_CLIENTS) {
78 CERROR("no room for clients - fix MDS_MAX_CLIENTS\n");
81 if (test_and_set_bit(cl_idx, bitmap)) {
82 cl_idx = find_next_zero_bit(bitmap, MDS_MAX_CLIENTS,
87 if (test_and_set_bit(cl_idx, bitmap)) {
88 CERROR("MDS client %d: bit already set in bitmap!!\n",
94 CDEBUG(D_INFO, "client at idx %d with UUID '%s' added\n",
95 cl_idx, med->med_mcd->mcd_uuid);
97 med->med_idx = cl_idx;
98 med->med_off = le32_to_cpu(mds->mds_server_data->msd_client_start) +
99 (cl_idx * le16_to_cpu(mds->mds_server_data->msd_client_size));
102 struct lvfs_run_ctxt saved;
103 loff_t off = med->med_off;
104 struct file *file = mds->mds_rcvd_filp;
107 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
108 rc = fsfilt_write_record(obd, file, med->med_mcd,
109 sizeof(*med->med_mcd), &off, 1);
110 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
114 CDEBUG(D_INFO, "wrote client mcd at idx %u off %llu (len %u)\n",
115 med->med_idx, med->med_off,
116 (unsigned int)sizeof(*med->med_mcd));
121 int mds_client_free(struct obd_export *exp, int clear_client)
123 struct mds_export_data *med = &exp->exp_mds_data;
124 struct mds_obd *mds = &exp->exp_obd->u.mds;
125 struct obd_device *obd = exp->exp_obd;
126 struct mds_client_data zero_mcd;
127 struct lvfs_run_ctxt saved;
129 unsigned long *bitmap = mds->mds_client_bitmap;
134 /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
135 if (!strcmp(med->med_mcd->mcd_uuid, obd->obd_uuid.uuid))
136 GOTO(free_and_out, 0);
138 CDEBUG(D_INFO, "freeing client at idx %u (%lld)with UUID '%s'\n",
139 med->med_idx, med->med_off, med->med_mcd->mcd_uuid);
143 /* Clear the bit _after_ zeroing out the client so we don't
144 race with mds_client_add and zero out new clients.*/
145 if (!test_bit(med->med_idx, bitmap)) {
146 CERROR("MDS client %u: bit already clear in bitmap!!\n",
152 memset(&zero_mcd, 0, sizeof zero_mcd);
153 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
154 rc = fsfilt_write_record(obd, mds->mds_rcvd_filp, &zero_mcd,
155 sizeof(zero_mcd), &med->med_off, 1);
156 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
158 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
159 "zeroing out client %s idx %u in %s rc %d\n",
160 med->med_mcd->mcd_uuid, med->med_idx, LAST_RCVD, rc);
163 if (!test_and_clear_bit(med->med_idx, bitmap)) {
164 CERROR("MDS client %u: bit already clear in bitmap!!\n",
170 OBD_FREE(med->med_mcd, sizeof(*med->med_mcd));
175 static int mds_server_free_data(struct mds_obd *mds)
177 OBD_FREE(mds->mds_client_bitmap,
178 MDS_MAX_CLIENT_WORDS * sizeof(unsigned long));
179 OBD_FREE(mds->mds_server_data, sizeof(*mds->mds_server_data));
180 mds->mds_server_data = NULL;
185 static int mds_read_last_rcvd(struct obd_device *obd, struct file *file)
187 struct mds_obd *mds = &obd->u.mds;
188 struct mds_server_data *msd;
189 struct mds_client_data *mcd = NULL;
191 unsigned long last_rcvd_size = file->f_dentry->d_inode->i_size;
196 /* ensure padding in the struct is the correct size */
197 LASSERT(offsetof(struct mds_server_data, msd_padding) +
198 sizeof(msd->msd_padding) == MDS_LR_SERVER_SIZE);
199 LASSERT(offsetof(struct mds_client_data, mcd_padding) +
200 sizeof(mcd->mcd_padding) == MDS_LR_CLIENT_SIZE);
202 OBD_ALLOC_WAIT(msd, sizeof(*msd));
206 OBD_ALLOC_WAIT(mds->mds_client_bitmap,
207 MDS_MAX_CLIENT_WORDS * sizeof(unsigned long));
208 if (!mds->mds_client_bitmap) {
209 OBD_FREE(msd, sizeof(*msd));
213 mds->mds_server_data = msd;
215 if (last_rcvd_size == 0) {
216 CWARN("%s: initializing new %s\n", obd->obd_name, LAST_RCVD);
218 memcpy(msd->msd_uuid, obd->obd_uuid.uuid,sizeof(msd->msd_uuid));
219 msd->msd_last_transno = 0;
220 mount_count = msd->msd_mount_count = 0;
221 msd->msd_server_size = cpu_to_le32(MDS_LR_SERVER_SIZE);
222 msd->msd_client_start = cpu_to_le32(MDS_LR_CLIENT_START);
223 msd->msd_client_size = cpu_to_le16(MDS_LR_CLIENT_SIZE);
224 msd->msd_feature_rocompat = cpu_to_le32(MDS_ROCOMPAT_LOVOBJID);
226 rc = fsfilt_read_record(obd, file, msd, sizeof(*msd), &off);
228 CERROR("error reading MDS %s: rc = %d\n", LAST_RCVD, rc);
231 if (strcmp(msd->msd_uuid, obd->obd_uuid.uuid) != 0) {
232 CERROR("OBD UUID %s does not match last_rcvd UUID %s\n",
233 obd->obd_uuid.uuid, msd->msd_uuid);
234 GOTO(err_msd, rc = -EINVAL);
236 mount_count = le64_to_cpu(msd->msd_mount_count);
238 if (msd->msd_feature_incompat & ~cpu_to_le32(MDS_INCOMPAT_SUPP)) {
239 CERROR("unsupported incompat feature %x\n",
240 le32_to_cpu(msd->msd_feature_incompat) &
242 GOTO(err_msd, rc = -EINVAL);
244 /* XXX updating existing b_devel fs only, can be removed in future */
245 msd->msd_feature_rocompat = cpu_to_le32(MDS_ROCOMPAT_LOVOBJID);
246 if (msd->msd_feature_rocompat & ~cpu_to_le32(MDS_ROCOMPAT_SUPP)) {
247 CERROR("unsupported read-only feature %x\n",
248 le32_to_cpu(msd->msd_feature_rocompat) &
250 /* Do something like remount filesystem read-only */
251 GOTO(err_msd, rc = -EINVAL);
254 mds->mds_last_transno = le64_to_cpu(msd->msd_last_transno);
256 CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
257 obd->obd_name, mds->mds_last_transno);
258 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
259 obd->obd_name, mount_count + 1);
260 CDEBUG(D_INODE, "%s: server data size: %u\n",
261 obd->obd_name, le32_to_cpu(msd->msd_server_size));
262 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
263 obd->obd_name, le32_to_cpu(msd->msd_client_start));
264 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
265 obd->obd_name, le32_to_cpu(msd->msd_client_size));
266 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
267 obd->obd_name, last_rcvd_size);
268 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
269 last_rcvd_size <= le32_to_cpu(msd->msd_client_start) ? 0 :
270 (last_rcvd_size - le32_to_cpu(msd->msd_client_start)) /
271 le16_to_cpu(msd->msd_client_size));
273 /* When we do a clean MDS shutdown, we save the last_transno into
274 * the header. If we find clients with higher last_transno values
275 * then those clients may need recovery done. */
276 for (cl_idx = 0, off = le32_to_cpu(msd->msd_client_start);
277 off < last_rcvd_size; cl_idx++) {
279 struct obd_export *exp;
280 struct mds_export_data *med;
283 OBD_ALLOC_WAIT(mcd, sizeof(*mcd));
285 GOTO(err_client, rc = -ENOMEM);
288 /* Don't assume off is incremented properly by
289 * fsfilt_read_record(), in case sizeof(*mcd)
290 * isn't the same as msd->msd_client_size. */
291 off = le32_to_cpu(msd->msd_client_start) +
292 cl_idx * le16_to_cpu(msd->msd_client_size);
293 rc = fsfilt_read_record(obd, file, mcd, sizeof(*mcd), &off);
295 CERROR("error reading MDS %s idx %d, off %llu: rc %d\n",
296 LAST_RCVD, cl_idx, off, rc);
297 break; /* read error shouldn't cause startup to fail */
300 if (mcd->mcd_uuid[0] == '\0') {
301 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
306 last_transno = le64_to_cpu(mcd->mcd_last_transno);
308 /* These exports are cleaned up by mds_disconnect(), so they
309 * need to be set up like real exports as mds_connect() does.
311 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
312 " srv lr: "LPU64"\n", mcd->mcd_uuid, cl_idx,
313 last_transno, le64_to_cpu(msd->msd_last_transno));
315 exp = class_new_export(obd);
317 GOTO(err_client, rc = -ENOMEM);
319 memcpy(&exp->exp_client_uuid.uuid, mcd->mcd_uuid,
320 sizeof exp->exp_client_uuid.uuid);
321 med = &exp->exp_mds_data;
323 mds_client_add(obd, mds, med, cl_idx);
324 /* create helper if export init gets more complex */
325 INIT_LIST_HEAD(&med->med_open_head);
326 spin_lock_init(&med->med_open_lock);
329 obd->obd_recoverable_clients++;
330 obd->obd_max_recoverable_clients++;
331 class_export_put(exp);
333 CDEBUG(D_OTHER, "client at idx %d has last_transno = "LPU64"\n",
334 cl_idx, last_transno);
336 if (last_transno > mds->mds_last_transno)
337 mds->mds_last_transno = last_transno;
340 obd->obd_last_committed = mds->mds_last_transno;
341 if (obd->obd_recoverable_clients) {
342 CWARN("RECOVERY: service %s, %d recoverable clients, "
343 "last_transno "LPU64"\n", obd->obd_name,
344 obd->obd_recoverable_clients, mds->mds_last_transno);
345 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
346 obd->obd_recovering = 1;
350 OBD_FREE(mcd, sizeof(*mcd));
352 mds->mds_mount_count = mount_count + 1;
353 msd->msd_mount_count = cpu_to_le64(mds->mds_mount_count);
355 /* save it, so mount count and last_transno is current */
356 rc = mds_update_server_data(obd, 1);
361 class_disconnect_exports(obd, 0);
363 mds_server_free_data(mds);
367 static int mds_fs_post_setup(struct obd_device *obd)
369 struct mds_obd *mds = &obd->u.mds;
370 struct dentry *de = mds_fid2dentry(mds, &mds->mds_rootfid, NULL);
373 rc = fsfilt_post_setup(obd);
377 fsfilt_set_kml_flags(obd, de->d_inode);
378 fsfilt_set_kml_flags(obd, mds->mds_pending_dir->d_inode);
380 fsfilt_set_mds_flags(obd, mds->mds_sb);
386 int mds_fs_setup(struct obd_device *obd, struct vfsmount *mnt)
388 struct mds_obd *mds = &obd->u.mds;
389 struct lvfs_run_ctxt saved;
390 struct dentry *dentry;
395 rc = cleanup_group_info();
399 mds->mds_vfsmnt = mnt;
400 mds->mds_sb = mnt->mnt_root->d_inode->i_sb;
402 fsfilt_setup(obd, mds->mds_sb);
404 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
405 obd->obd_lvfs_ctxt.pwdmnt = mnt;
406 obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
407 obd->obd_lvfs_ctxt.fs = get_ds();
408 obd->obd_lvfs_ctxt.cb_ops = mds_lvfs_ops;
410 /* setup the directory tree */
411 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
412 dentry = simple_mkdir(current->fs->pwd, "ROOT", 0755, 0);
413 if (IS_ERR(dentry)) {
414 rc = PTR_ERR(dentry);
415 CERROR("cannot create ROOT directory: rc = %d\n", rc);
419 mds->mds_rootfid.id = dentry->d_inode->i_ino;
420 mds->mds_rootfid.generation = dentry->d_inode->i_generation;
421 mds->mds_rootfid.f_type = S_IFDIR;
425 dentry = lookup_one_len("__iopen__", current->fs->pwd,
426 strlen("__iopen__"));
427 if (IS_ERR(dentry)) {
428 rc = PTR_ERR(dentry);
429 CERROR("cannot lookup __iopen__ directory: rc = %d\n", rc);
432 if (!dentry->d_inode) {
434 CERROR("__iopen__ directory has no inode? rc = %d\n", rc);
437 mds->mds_fid_de = dentry;
439 dentry = simple_mkdir(current->fs->pwd, "PENDING", 0777, 1);
440 if (IS_ERR(dentry)) {
441 rc = PTR_ERR(dentry);
442 CERROR("cannot create PENDING directory: rc = %d\n", rc);
445 mds->mds_pending_dir = dentry;
447 dentry = simple_mkdir(current->fs->pwd, "LOGS", 0777, 1);
448 if (IS_ERR(dentry)) {
449 rc = PTR_ERR(dentry);
450 CERROR("cannot create LOGS directory: rc = %d\n", rc);
451 GOTO(err_pending, rc);
453 mds->mds_logs_dir = dentry;
455 dentry = simple_mkdir(current->fs->pwd, "OBJECTS", 0777, 1);
456 if (IS_ERR(dentry)) {
457 rc = PTR_ERR(dentry);
458 CERROR("cannot create OBJECTS directory: rc = %d\n", rc);
461 mds->mds_objects_dir = dentry;
463 dentry = simple_mkdir(current->fs->pwd, "FIDS", 0777, 1);
464 if (IS_ERR(dentry)) {
465 rc = PTR_ERR(dentry);
466 CERROR("cannot create FIDS directory: rc = %d\n", rc);
469 mds->mds_fids_dir = dentry;
471 /* open and test the last rcvd file */
472 file = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644);
475 CERROR("cannot open/create %s file: rc = %d\n", LAST_RCVD, rc);
476 GOTO(err_objects, rc = PTR_ERR(file));
478 mds->mds_rcvd_filp = file;
479 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
480 CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
481 file->f_dentry->d_inode->i_mode);
482 GOTO(err_last_rcvd, rc = -ENOENT);
485 rc = mds_read_last_rcvd(obd, file);
487 CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
488 GOTO(err_last_rcvd, rc);
491 /* open and test the lov objd file */
492 file = filp_open(LOV_OBJID, O_RDWR | O_CREAT, 0644);
495 CERROR("cannot open/create %s file: rc = %d\n", LOV_OBJID, rc);
496 GOTO(err_client, rc = PTR_ERR(file));
498 mds->mds_lov_objid_filp = file;
499 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
500 CERROR("%s is not a regular file!: mode = %o\n", LOV_OBJID,
501 file->f_dentry->d_inode->i_mode);
502 GOTO(err_lov_objid, rc = -ENOENT);
506 rc = mds_fs_post_setup(obd);
508 CERROR("can not post setup fsfilt\n");
510 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
514 if (mds->mds_lov_objid_filp && filp_close(mds->mds_lov_objid_filp, 0))
515 CERROR("can't close %s after error\n", LOV_OBJID);
517 class_disconnect_exports(obd, 0);
519 if (mds->mds_rcvd_filp && filp_close(mds->mds_rcvd_filp, 0))
520 CERROR("can't close %s after error\n", LAST_RCVD);
522 dput(mds->mds_fids_dir);
524 dput(mds->mds_objects_dir);
526 dput(mds->mds_logs_dir);
528 dput(mds->mds_pending_dir);
530 dput(mds->mds_fid_de);
534 static int mds_fs_post_cleanup(struct obd_device *obd)
537 rc = fsfilt_post_cleanup(obd);
541 int mds_fs_cleanup(struct obd_device *obd, int flags)
543 struct mds_obd *mds = &obd->u.mds;
544 struct lvfs_run_ctxt saved;
547 if (flags & OBD_OPT_FAILOVER)
548 CERROR("%s: shutting down for failover; client state will"
549 " be preserved.\n", obd->obd_name);
551 class_disconnect_exports(obd, flags); /* cleans up client info too */
552 mds_server_free_data(mds);
554 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
555 if (mds->mds_rcvd_filp) {
556 rc = filp_close(mds->mds_rcvd_filp, 0);
557 mds->mds_rcvd_filp = NULL;
559 CERROR("%s file won't close, rc=%d\n", LAST_RCVD, rc);
561 if (mds->mds_lov_objid_filp) {
562 rc = filp_close(mds->mds_lov_objid_filp, 0);
563 mds->mds_lov_objid_filp = NULL;
565 CERROR("%s file won't close, rc=%d\n", LOV_OBJID, rc);
567 if (mds->mds_fids_dir != NULL) {
568 l_dput(mds->mds_fids_dir);
569 mds->mds_fids_dir = NULL;
571 if (mds->mds_objects_dir != NULL) {
572 l_dput(mds->mds_objects_dir);
573 mds->mds_objects_dir = NULL;
575 if (mds->mds_logs_dir) {
576 l_dput(mds->mds_logs_dir);
577 mds->mds_logs_dir = NULL;
579 if (mds->mds_pending_dir) {
580 l_dput(mds->mds_pending_dir);
581 mds->mds_pending_dir = NULL;
583 rc = mds_fs_post_cleanup(obd);
585 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
586 shrink_dcache_parent(mds->mds_fid_de);
587 dput(mds->mds_fid_de);
592 /* Creates an object with the same name as its fid. Because this is not at all
593 * performance sensitive, it is accomplished by creating a file, checking the
594 * fid, and renaming it. */
595 int mds_obd_create(struct obd_export *exp, struct obdo *oa,
596 struct lov_stripe_md **ea, struct obd_trans_info *oti)
598 struct mds_obd *mds = &exp->exp_obd->u.mds;
599 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
600 unsigned int tmpname = ll_insecure_random_int();
602 struct dentry *new_child;
603 struct lvfs_run_ctxt saved;
604 char fidname[LL_FID_NAMELEN];
606 int rc = 0, err, namelen;
609 push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
611 sprintf(fidname, "OBJECTS/%u", tmpname);
612 filp = filp_open(fidname, O_CREAT | O_EXCL, 0644);
616 CERROR("impossible object name collision %u\n",
620 CERROR("error creating tmp object %u: rc %d\n", tmpname, rc);
624 LASSERT(mds->mds_objects_dir == filp->f_dentry->d_parent);
626 oa->o_id = filp->f_dentry->d_inode->i_ino;
627 oa->o_generation = filp->f_dentry->d_inode->i_generation;
628 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
630 down(&parent_inode->i_sem);
631 new_child = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
633 if (IS_ERR(new_child)) {
634 CERROR("getting neg dentry for obj rename: %d\n", rc);
635 GOTO(out_close, rc = PTR_ERR(new_child));
637 if (new_child->d_inode != NULL) {
638 CERROR("impossible non-negative obj dentry " LPU64":%u!\n",
639 oa->o_id, oa->o_generation);
643 handle = fsfilt_start(exp->exp_obd, mds->mds_objects_dir->d_inode,
644 FSFILT_OP_RENAME, NULL);
646 GOTO(out_dput, rc = PTR_ERR(handle));
649 rc = vfs_rename(mds->mds_objects_dir->d_inode, filp->f_dentry,
650 mds->mds_objects_dir->d_inode, new_child);
653 CERROR("error renaming new object "LPU64":%u: rc %d\n",
654 oa->o_id, oa->o_generation, rc);
656 err = fsfilt_commit(exp->exp_obd, mds->mds_sb,
657 mds->mds_objects_dir->d_inode, handle, 0);
659 oa->o_gr = FILTER_GROUP_FIRST_MDS + mds->mds_num;
660 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGENER | OBD_MD_FLGROUP;
667 up(&parent_inode->i_sem);
668 err = filp_close(filp, 0);
670 CERROR("closing tmpfile %u: rc %d\n", tmpname, rc);
675 pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
679 int mds_obd_destroy(struct obd_export *exp, struct obdo *oa,
680 struct lov_stripe_md *ea, struct obd_trans_info *oti)
682 struct mds_obd *mds = &exp->exp_obd->u.mds;
683 struct inode *parent_inode = mds->mds_objects_dir->d_inode;
684 struct obd_device *obd = exp->exp_obd;
685 struct lvfs_run_ctxt saved;
686 char fidname[LL_FID_NAMELEN];
689 int err, namelen, rc = 0;
692 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
694 namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
696 down(&parent_inode->i_sem);
697 de = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
698 if (de == NULL || de->d_inode == NULL) {
699 CERROR("destroying non-existent object "LPU64" %s\n",
701 GOTO(out_dput, rc = IS_ERR(de) ? PTR_ERR(de) : -ENOENT);
704 /* Stripe count is 1 here since this is some MDS specific stuff
705 that is unlinked, not spanned across multiple OSTs */
706 handle = fsfilt_start_log(obd, mds->mds_objects_dir->d_inode,
707 FSFILT_OP_UNLINK, oti, 1);
710 GOTO(out_dput, rc = PTR_ERR(handle));
712 rc = vfs_unlink(mds->mds_objects_dir->d_inode, de);
714 CERROR("error destroying object "LPU64":%u: rc %d\n",
715 oa->o_id, oa->o_generation, rc);
717 err = fsfilt_commit(obd, mds->mds_sb, mds->mds_objects_dir->d_inode,
724 up(&parent_inode->i_sem);
725 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);