1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 * Lustre Metadata Server (mds) request handler
7 * Copyright (c) 2001-2005 Cluster File Systems, Inc.
8 * Author: Peter Braam <braam@clusterfs.com>
9 * Author: Andreas Dilger <adilger@clusterfs.com>
10 * Author: Phil Schwan <phil@clusterfs.com>
11 * Author: Mike Shaver <shaver@clusterfs.com>
13 * This file is part of the Lustre file system, http://www.lustre.org
14 * Lustre is a trademark of Cluster File Systems, Inc.
16 * You may have signed or agreed to another license before downloading
17 * this software. If so, you are bound by the terms and conditions
18 * of that agreement, and the following does not apply to you. See the
19 * LICENSE file included with this distribution for more information.
21 * If you did not agree to a different license, then this copy of Lustre
22 * is open source software; you can redistribute it and/or modify it
23 * under the terms of version 2 of the GNU General Public License as
24 * published by the Free Software Foundation.
26 * In either case, Lustre is distributed in the hope that it will be
27 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
28 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * license text for more details.
33 # define EXPORT_SYMTAB
35 #define DEBUG_SUBSYSTEM S_MDS
37 #include <lustre_mds.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/random.h>
42 #include <linux/jbd.h>
43 #include <linux/smp_lock.h>
44 #include <linux/buffer_head.h>
45 #include <linux/workqueue.h>
46 #include <linux/mount.h>
48 #include <linux/lustre_acl.h>
49 #include <obd_class.h>
50 #include <lustre_dlm.h>
52 #include <lustre_fsfilt.h>
53 #include <lprocfs_status.h>
54 #include <lustre_commit_confd.h>
55 #include <lustre_quota.h>
56 #include <lustre_disk.h>
57 #include <lustre_param.h>
59 #include "mds_internal.h"
62 CFS_MODULE_PARM(mds_num_threads, "i", int, 0444,
63 "number of MDS service threads to start");
65 __u32 mds_max_ost_index=0xFFFF;
66 CFS_MODULE_PARM(mds_max_ost_index, "i", int, 0444,
69 static int mds_intent_policy(struct ldlm_namespace *ns,
70 struct ldlm_lock **lockp, void *req_cookie,
71 ldlm_mode_t mode, int flags, void *data);
72 static int mds_postsetup(struct obd_device *obd);
73 static int mds_cleanup(struct obd_device *obd);
75 /* Assumes caller has already pushed into the kernel filesystem context */
76 static int mds_sendpage(struct ptlrpc_request *req, struct file *file,
77 loff_t offset, int count)
79 struct ptlrpc_bulk_desc *desc;
80 struct l_wait_info lwi;
82 int rc = 0, npages, i, tmpcount, tmpsize = 0;
85 LASSERT((offset & ~CFS_PAGE_MASK) == 0); /* I'm dubious about this */
87 npages = (count + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
88 OBD_ALLOC(pages, sizeof(*pages) * npages);
90 GOTO(out, rc = -ENOMEM);
92 desc = ptlrpc_prep_bulk_exp(req, npages, BULK_PUT_SOURCE,
95 GOTO(out_free, rc = -ENOMEM);
97 for (i = 0, tmpcount = count; i < npages; i++, tmpcount -= tmpsize) {
98 tmpsize = tmpcount > CFS_PAGE_SIZE ? CFS_PAGE_SIZE : tmpcount;
100 OBD_PAGE_ALLOC(pages[i], CFS_ALLOC_STD);
101 if (pages[i] == NULL)
102 GOTO(cleanup_buf, rc = -ENOMEM);
104 ptlrpc_prep_bulk_page(desc, pages[i], 0, tmpsize);
107 for (i = 0, tmpcount = count; i < npages; i++, tmpcount -= tmpsize) {
108 tmpsize = tmpcount > CFS_PAGE_SIZE ? CFS_PAGE_SIZE : tmpcount;
109 CDEBUG(D_EXT2, "reading %u@%llu from dir %lu (size %llu)\n",
110 tmpsize, offset, file->f_dentry->d_inode->i_ino,
111 i_size_read(file->f_dentry->d_inode));
113 rc = fsfilt_readpage(req->rq_export->exp_obd, file,
114 kmap(pages[i]), tmpsize, &offset);
118 GOTO(cleanup_buf, rc = -EIO);
121 LASSERT(desc->bd_nob == count);
123 rc = ptlrpc_start_bulk_transfer(desc);
125 GOTO(cleanup_buf, rc);
127 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
128 CERROR("obd_fail_loc=%x, fail operation rc=%d\n",
129 OBD_FAIL_MDS_SENDPAGE, rc);
130 GOTO(abort_bulk, rc);
133 lwi = LWI_TIMEOUT(obd_timeout * HZ / 4, NULL, NULL);
134 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc), &lwi);
135 LASSERT (rc == 0 || rc == -ETIMEDOUT);
138 if (desc->bd_success &&
139 desc->bd_nob_transferred == count)
140 GOTO(cleanup_buf, rc);
142 rc = -ETIMEDOUT; /* XXX should this be a different errno? */
145 DEBUG_REQ(D_ERROR, req, "bulk failed: %s %d(%d), evicting %s@%s",
146 (rc == -ETIMEDOUT) ? "timeout" : "network error",
147 desc->bd_nob_transferred, count,
148 req->rq_export->exp_client_uuid.uuid,
149 req->rq_export->exp_connection->c_remote_uuid.uuid);
151 class_fail_export(req->rq_export);
155 ptlrpc_abort_bulk (desc);
157 for (i = 0; i < npages; i++)
159 OBD_PAGE_FREE(pages[i]);
161 ptlrpc_free_bulk(desc);
163 OBD_FREE(pages, sizeof(*pages) * npages);
168 /* only valid locked dentries or errors should be returned */
169 struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
170 struct vfsmount **mnt, int lock_mode,
171 struct lustre_handle *lockh,
174 struct mds_obd *mds = &obd->u.mds;
175 struct dentry *de = mds_fid2dentry(mds, fid, mnt), *retval = de;
176 struct ldlm_res_id res_id = { .name = {0} };
177 int flags = LDLM_FL_ATOMIC_CB, rc;
178 ldlm_policy_data_t policy = { .l_inodebits = { lockpart} };
184 res_id.name[0] = de->d_inode->i_ino;
185 res_id.name[1] = de->d_inode->i_generation;
186 rc = ldlm_cli_enqueue_local(obd->obd_namespace, &res_id,
187 LDLM_IBITS, &policy, lock_mode, &flags,
188 ldlm_blocking_ast, ldlm_completion_ast,
189 NULL, NULL, 0, NULL, lockh);
190 if (rc != ELDLM_OK) {
192 retval = ERR_PTR(-EIO); /* XXX translate ldlm code */
198 /* Look up an entry by inode number. */
199 /* this function ONLY returns valid dget'd dentries with an initialized inode
201 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
202 struct vfsmount **mnt)
205 unsigned long ino = fid->id;
206 __u32 generation = fid->generation;
208 struct dentry *result;
211 RETURN(ERR_PTR(-ESTALE));
213 snprintf(fid_name, sizeof(fid_name), "0x%lx", ino);
215 CDEBUG(D_DENTRY, "--> mds_fid2dentry: ino/gen %lu/%u, sb %p\n",
216 ino, generation, mds->mds_obt.obt_sb);
218 /* under ext3 this is neither supposed to return bad inodes
220 result = ll_lookup_one_len(fid_name, mds->mds_fid_de, strlen(fid_name));
224 inode = result->d_inode;
226 RETURN(ERR_PTR(-ENOENT));
228 if (inode->i_generation == 0 || inode->i_nlink == 0) {
229 LCONSOLE_WARN("Found inode with zero generation or link -- this"
230 " may indicate disk corruption (inode: %lu/%u, "
231 "link %lu, count %d)\n", inode->i_ino,
232 inode->i_generation,(unsigned long)inode->i_nlink,
233 atomic_read(&inode->i_count));
235 RETURN(ERR_PTR(-ENOENT));
238 if (generation && inode->i_generation != generation) {
239 /* we didn't find the right inode.. */
240 CDEBUG(D_INODE, "found wrong generation: inode %lu, link: %lu, "
241 "count: %d, generation %u/%u\n", inode->i_ino,
242 (unsigned long)inode->i_nlink,
243 atomic_read(&inode->i_count), inode->i_generation,
246 RETURN(ERR_PTR(-ENOENT));
250 *mnt = mds->mds_vfsmnt;
257 static int mds_connect_internal(struct obd_export *exp,
258 struct obd_connect_data *data)
260 struct obd_device *obd = exp->exp_obd;
262 data->ocd_connect_flags &= MDT_CONNECT_SUPPORTED;
263 data->ocd_ibits_known &= MDS_INODELOCK_FULL;
265 /* If no known bits (which should not happen, probably,
266 as everybody should support LOOKUP and UPDATE bits at least)
267 revert to compat mode with plain locks. */
268 if (!data->ocd_ibits_known &&
269 data->ocd_connect_flags & OBD_CONNECT_IBITS)
270 data->ocd_connect_flags &= ~OBD_CONNECT_IBITS;
272 if (!obd->u.mds.mds_fl_acl)
273 data->ocd_connect_flags &= ~OBD_CONNECT_ACL;
275 if (!obd->u.mds.mds_fl_user_xattr)
276 data->ocd_connect_flags &= ~OBD_CONNECT_XATTR;
278 exp->exp_connect_flags = data->ocd_connect_flags;
279 data->ocd_version = LUSTRE_VERSION_CODE;
280 exp->exp_mds_data.med_ibits_known = data->ocd_ibits_known;
283 if (obd->u.mds.mds_fl_acl &&
284 ((exp->exp_connect_flags & OBD_CONNECT_ACL) == 0)) {
285 CWARN("%s: MDS requires ACL support but client does not\n",
292 static int mds_reconnect(struct obd_export *exp, struct obd_device *obd,
293 struct obd_uuid *cluuid,
294 struct obd_connect_data *data)
299 if (exp == NULL || obd == NULL || cluuid == NULL)
302 rc = mds_connect_internal(exp, data);
307 /* Establish a connection to the MDS.
309 * This will set up an export structure for the client to hold state data
310 * about that client, like open files, the last operation number it did
311 * on the server, etc.
313 static int mds_connect(const struct lu_env *env,
314 struct lustre_handle *conn, struct obd_device *obd,
315 struct obd_uuid *cluuid, struct obd_connect_data *data)
317 struct obd_export *exp;
318 struct mds_export_data *med;
319 struct mds_client_data *mcd = NULL;
323 if (!conn || !obd || !cluuid)
326 /* XXX There is a small race between checking the list and adding a
327 * new connection for the same UUID, but the real threat (list
328 * corruption when multiple different clients connect) is solved.
330 * There is a second race between adding the export to the list,
331 * and filling in the client data below. Hence skipping the case
332 * of NULL mcd above. We should already be controlling multiple
333 * connects at the client, and we can't hold the spinlock over
334 * memory allocations without risk of deadlocking.
336 rc = class_connect(conn, obd, cluuid);
339 exp = class_conn2export(conn);
341 med = &exp->exp_mds_data;
343 rc = mds_connect_internal(exp, data);
347 OBD_ALLOC(mcd, sizeof(*mcd));
349 GOTO(out, rc = -ENOMEM);
351 memcpy(mcd->mcd_uuid, cluuid, sizeof(mcd->mcd_uuid));
354 rc = mds_client_add(obd, exp, -1);
360 OBD_FREE(mcd, sizeof(*mcd));
363 class_disconnect(exp);
365 class_export_put(exp);
371 int mds_init_export(struct obd_export *exp)
373 struct mds_export_data *med = &exp->exp_mds_data;
375 INIT_LIST_HEAD(&med->med_open_head);
376 spin_lock_init(&med->med_open_lock);
378 spin_lock(&exp->exp_lock);
379 exp->exp_connecting = 1;
380 spin_unlock(&exp->exp_lock);
385 static int mds_destroy_export(struct obd_export *export)
387 struct mds_export_data *med;
388 struct obd_device *obd = export->exp_obd;
389 struct mds_obd *mds = &obd->u.mds;
390 struct lvfs_run_ctxt saved;
391 struct lov_mds_md *lmm;
392 struct llog_cookie *logcookies;
396 med = &export->exp_mds_data;
397 target_destroy_export(export);
399 if (obd_uuid_equals(&export->exp_client_uuid, &obd->obd_uuid))
402 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
403 /* Close any open files (which may also cause orphan unlinking). */
405 OBD_ALLOC(lmm, mds->mds_max_mdsize);
407 CWARN("%s: allocation failure during cleanup; can not force "
408 "close file handles on this service.\n", obd->obd_name);
409 GOTO(out, rc = -ENOMEM);
412 OBD_ALLOC(logcookies, mds->mds_max_cookiesize);
413 if (logcookies == NULL) {
414 CWARN("%s: allocation failure during cleanup; can not force "
415 "close file handles on this service.\n", obd->obd_name);
416 OBD_FREE(lmm, mds->mds_max_mdsize);
417 GOTO(out_lmm, rc = -ENOMEM);
420 spin_lock(&med->med_open_lock);
421 while (!list_empty(&med->med_open_head)) {
422 struct list_head *tmp = med->med_open_head.next;
423 struct mds_file_data *mfd =
424 list_entry(tmp, struct mds_file_data, mfd_list);
425 int lmm_size = mds->mds_max_mdsize;
426 umode_t mode = mfd->mfd_dentry->d_inode->i_mode;
429 /* Remove mfd handle so it can't be found again.
430 * We are consuming the mfd_list reference here. */
431 mds_mfd_unlink(mfd, 0);
432 spin_unlock(&med->med_open_lock);
434 /* If you change this message, be sure to update
435 * replay_single:test_46 */
436 CDEBUG(D_INODE|D_IOCTL, "%s: force closing file handle for "
437 "%.*s (ino %lu)\n", obd->obd_name,
438 mfd->mfd_dentry->d_name.len,mfd->mfd_dentry->d_name.name,
439 mfd->mfd_dentry->d_inode->i_ino);
441 rc = mds_get_md(obd, mfd->mfd_dentry->d_inode, lmm, &lmm_size, 1);
443 CWARN("mds_get_md failure, rc=%d\n", rc);
445 valid |= OBD_MD_FLEASIZE;
447 /* child orphan sem protects orphan_dec_test and
448 * is_orphan race, mds_mfd_close drops it */
449 MDS_DOWN_WRITE_ORPHAN_SEM(mfd->mfd_dentry->d_inode);
450 rc = mds_mfd_close(NULL, REQ_REC_OFF, obd, mfd,
451 !(export->exp_flags & OBD_OPT_FAILOVER),
452 lmm, lmm_size, logcookies,
453 mds->mds_max_cookiesize,
457 CDEBUG(D_INODE|D_IOCTL, "Error closing file: %d\n", rc);
459 if (valid & OBD_MD_FLCOOKIE) {
460 rc = mds_osc_destroy_orphan(obd, mode, lmm,
461 lmm_size, logcookies, 1);
463 CDEBUG(D_INODE, "%s: destroy of orphan failed,"
464 " rc = %d\n", obd->obd_name, rc);
467 valid &= ~OBD_MD_FLCOOKIE;
470 spin_lock(&med->med_open_lock);
472 spin_unlock(&med->med_open_lock);
474 OBD_FREE(logcookies, mds->mds_max_cookiesize);
476 OBD_FREE(lmm, mds->mds_max_mdsize);
478 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
479 mds_client_free(export);
483 static int mds_disconnect(struct obd_export *exp)
489 class_export_get(exp);
491 /* Disconnect early so that clients can't keep using export */
492 rc = class_disconnect(exp);
493 if (exp->exp_obd->obd_namespace != NULL)
494 ldlm_cancel_locks_for_export(exp);
496 /* complete all outstanding replies */
497 spin_lock(&exp->exp_lock);
498 while (!list_empty(&exp->exp_outstanding_replies)) {
499 struct ptlrpc_reply_state *rs =
500 list_entry(exp->exp_outstanding_replies.next,
501 struct ptlrpc_reply_state, rs_exp_list);
502 struct ptlrpc_service *svc = rs->rs_service;
504 spin_lock(&svc->srv_lock);
505 list_del_init(&rs->rs_exp_list);
506 ptlrpc_schedule_difficult_reply(rs);
507 spin_unlock(&svc->srv_lock);
509 spin_unlock(&exp->exp_lock);
511 class_export_put(exp);
515 static int mds_getstatus(struct ptlrpc_request *req)
517 struct mds_obd *mds = mds_req2mds(req);
518 struct mds_body *body;
519 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
522 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETSTATUS_PACK, req->rq_status = -ENOMEM);
523 rc = lustre_pack_reply(req, 2, size, NULL);
525 RETURN(req->rq_status = rc);
527 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
528 memcpy(&body->fid1, &mds->mds_rootfid, sizeof(body->fid1));
530 /* the last_committed and last_xid fields are filled in for all
531 * replies already - no need to do so here also.
536 /* get the LOV EA from @inode and store it into @md. It can be at most
537 * @size bytes, and @size is updated with the actual EA size.
538 * The EA size is also returned on success, and -ve errno on failure.
539 * If there is no EA then 0 is returned. */
540 int mds_get_md(struct obd_device *obd, struct inode *inode, void *md,
547 LOCK_INODE_MUTEX(inode);
548 rc = fsfilt_get_md(obd, inode, md, *size, "lov");
551 CERROR("Error %d reading eadata for ino %lu\n",
555 rc = mds_convert_lov_ea(obd, inode, md, lmm_size);
567 UNLOCK_INODE_MUTEX(inode);
573 /* Call with lock=1 if you want mds_pack_md to take the i_mutex.
574 * Call with lock=0 if the caller has already taken the i_mutex. */
575 int mds_pack_md(struct obd_device *obd, struct lustre_msg *msg, int offset,
576 struct mds_body *body, struct inode *inode, int lock)
578 struct mds_obd *mds = &obd->u.mds;
584 lmm = lustre_msg_buf(msg, offset, 0);
586 /* Some problem with getting eadata when I sized the reply
588 CDEBUG(D_INFO, "no space reserved for inode %lu MD\n",
592 lmm_size = lustre_msg_buflen(msg, offset);
594 /* I don't really like this, but it is a sanity check on the client
595 * MD request. However, if the client doesn't know how much space
596 * to reserve for the MD, it shouldn't be bad to have too much space.
598 if (lmm_size > mds->mds_max_mdsize) {
599 CWARN("Reading MD for inode %lu of %d bytes > max %d\n",
600 inode->i_ino, lmm_size, mds->mds_max_mdsize);
604 rc = mds_get_md(obd, inode, lmm, &lmm_size, lock);
606 if (S_ISDIR(inode->i_mode))
607 body->valid |= OBD_MD_FLDIREA;
609 body->valid |= OBD_MD_FLEASIZE;
610 body->eadatasize = lmm_size;
617 #ifdef CONFIG_FS_POSIX_ACL
619 int mds_pack_posix_acl(struct inode *inode, struct lustre_msg *repmsg,
620 struct mds_body *repbody, int repoff)
622 struct dentry de = { .d_inode = inode };
626 LASSERT(repbody->aclsize == 0);
627 LASSERT(lustre_msg_bufcount(repmsg) > repoff);
629 buflen = lustre_msg_buflen(repmsg, repoff);
633 if (!inode->i_op || !inode->i_op->getxattr)
636 rc = inode->i_op->getxattr(&de, MDS_XATTR_NAME_ACL_ACCESS,
637 lustre_msg_buf(repmsg, repoff, buflen),
641 repbody->aclsize = rc;
642 else if (rc != -ENODATA) {
643 CERROR("buflen %d, get acl: %d\n", buflen, rc);
648 repbody->valid |= OBD_MD_FLACL;
652 #define mds_pack_posix_acl(inode, repmsg, repbody, repoff) 0
655 int mds_pack_acl(struct mds_export_data *med, struct inode *inode,
656 struct lustre_msg *repmsg, struct mds_body *repbody,
659 return mds_pack_posix_acl(inode, repmsg, repbody, repoff);
662 static int mds_getattr_internal(struct obd_device *obd, struct dentry *dentry,
663 struct ptlrpc_request *req,
664 struct mds_body *reqbody, int reply_off)
666 struct mds_body *body;
667 struct inode *inode = dentry->d_inode;
674 body = lustre_msg_buf(req->rq_repmsg, reply_off, sizeof(*body));
675 LASSERT(body != NULL); /* caller prepped reply */
677 mds_pack_inode2fid(&body->fid1, inode);
678 body->flags = reqbody->flags; /* copy MDS_BFLAG_EXT_FLAGS if present */
679 mds_pack_inode2body(body, inode);
682 if ((S_ISREG(inode->i_mode) && (reqbody->valid & OBD_MD_FLEASIZE)) ||
683 (S_ISDIR(inode->i_mode) && (reqbody->valid & OBD_MD_FLDIREA))) {
684 rc = mds_pack_md(obd, req->rq_repmsg, reply_off, body,
687 /* If we have LOV EA data, the OST holds size, atime, mtime */
688 if (!(body->valid & OBD_MD_FLEASIZE) &&
689 !(body->valid & OBD_MD_FLDIREA))
690 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
691 OBD_MD_FLATIME | OBD_MD_FLMTIME);
693 lustre_shrink_reply(req, reply_off, body->eadatasize, 0);
694 if (body->eadatasize)
696 } else if (S_ISLNK(inode->i_mode) &&
697 (reqbody->valid & OBD_MD_LINKNAME) != 0) {
698 char *symname = lustre_msg_buf(req->rq_repmsg, reply_off, 0);
701 LASSERT (symname != NULL); /* caller prepped reply */
702 len = lustre_msg_buflen(req->rq_repmsg, reply_off);
704 rc = inode->i_op->readlink(dentry, symname, len);
706 CERROR("readlink failed: %d\n", rc);
707 } else if (rc != len - 1) {
708 CERROR ("Unexpected readlink rc %d: expecting %d\n",
712 CDEBUG(D_INODE, "read symlink dest %s\n", symname);
713 body->valid |= OBD_MD_LINKNAME;
714 body->eadatasize = rc + 1;
715 symname[rc] = 0; /* NULL terminate */
719 } else if (reqbody->valid == OBD_MD_FLFLAGS &&
720 reqbody->flags & MDS_BFLAG_EXT_FLAGS) {
723 /* We only return the full set of flags on ioctl, otherwise we
724 * get enough flags from the inode in mds_pack_inode2body(). */
725 rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_GETFLAGS,
728 body->flags = flags | MDS_BFLAG_EXT_FLAGS;
731 if (reqbody->valid & OBD_MD_FLMODEASIZE) {
732 struct mds_obd *mds = mds_req2mds(req);
733 body->max_cookiesize = mds->mds_max_cookiesize;
734 body->max_mdsize = mds->mds_max_mdsize;
735 body->valid |= OBD_MD_FLMODEASIZE;
741 #ifdef CONFIG_FS_POSIX_ACL
742 if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
743 (reqbody->valid & OBD_MD_FLACL)) {
744 rc = mds_pack_acl(&req->rq_export->exp_mds_data,
745 inode, req->rq_repmsg,
748 lustre_shrink_reply(req, reply_off, body->aclsize, 0);
757 static int mds_getattr_pack_msg(struct ptlrpc_request *req, struct inode *inode,
760 struct mds_obd *mds = mds_req2mds(req);
761 struct mds_body *body;
762 int rc, bufcount = 2;
763 int size[4] = { sizeof(struct ptlrpc_body), sizeof(*body) };
766 LASSERT(offset == REQ_REC_OFF); /* non-intent */
768 body = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*body));
769 LASSERT(body != NULL); /* checked by caller */
770 LASSERT(lustre_req_swabbed(req, offset)); /* swabbed by caller */
772 if ((S_ISREG(inode->i_mode) && (body->valid & OBD_MD_FLEASIZE)) ||
773 (S_ISDIR(inode->i_mode) && (body->valid & OBD_MD_FLDIREA))) {
774 LOCK_INODE_MUTEX(inode);
775 rc = fsfilt_get_md(req->rq_export->exp_obd, inode, NULL, 0,
777 UNLOCK_INODE_MUTEX(inode);
778 CDEBUG(D_INODE, "got %d bytes MD data for inode %lu\n",
781 if (rc != -ENODATA) {
782 CERROR("error getting inode %lu MD: rc = %d\n",
787 } else if (rc > mds->mds_max_mdsize) {
789 CERROR("MD size %d larger than maximum possible %u\n",
790 rc, mds->mds_max_mdsize);
795 } else if (S_ISLNK(inode->i_mode) && (body->valid & OBD_MD_LINKNAME)) {
796 if (i_size_read(inode) + 1 != body->eadatasize)
797 CERROR("symlink size: %Lu, reply space: %d\n",
798 i_size_read(inode) + 1, body->eadatasize);
799 size[bufcount] = min_t(int, i_size_read(inode) + 1,
802 CDEBUG(D_INODE, "symlink size: %Lu, reply space: %d\n",
803 i_size_read(inode) + 1, body->eadatasize);
806 #ifdef CONFIG_FS_POSIX_ACL
807 if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
808 (body->valid & OBD_MD_FLACL)) {
809 struct dentry de = { .d_inode = inode };
812 if (inode->i_op && inode->i_op->getxattr) {
813 rc = inode->i_op->getxattr(&de, MDS_XATTR_NAME_ACL_ACCESS,
817 if (rc != -ENODATA) {
818 CERROR("got acl size: %d\n", rc);
828 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
829 CERROR("failed MDS_GETATTR_PACK test\n");
830 req->rq_status = -ENOMEM;
834 rc = lustre_pack_reply(req, bufcount, size, NULL);
843 static int mds_getattr_lock(struct ptlrpc_request *req, int offset,
844 int child_part, struct lustre_handle *child_lockh)
846 struct obd_device *obd = req->rq_export->exp_obd;
847 struct mds_obd *mds = &obd->u.mds;
848 struct ldlm_reply *rep = NULL;
849 struct lvfs_run_ctxt saved;
850 struct mds_body *body;
851 struct dentry *dparent = NULL, *dchild = NULL;
852 struct lvfs_ucred uc = {0,};
853 struct lustre_handle parent_lockh;
855 int rc = 0, cleanup_phase = 0, resent_req = 0;
859 LASSERT(!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME));
861 /* Swab now, before anyone looks inside the request */
862 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
863 lustre_swab_mds_body);
865 CERROR("Can't swab mds_body\n");
869 lustre_set_req_swabbed(req, offset + 1);
870 name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
872 CERROR("Can't unpack name\n");
875 namesize = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
876 /* namesize less than 2 means we have empty name, probably came from
877 revalidate by cfid, so no point in having name to be set */
881 rc = mds_init_ucred(&uc, req, offset);
885 LASSERT(offset == REQ_REC_OFF || offset == DLM_INTENT_REC_OFF);
886 /* if requests were at offset 2, the getattr reply goes back at 1 */
887 if (offset == DLM_INTENT_REC_OFF) {
888 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF,
890 offset = DLM_REPLY_REC_OFF;
893 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
894 cleanup_phase = 1; /* kernel context */
895 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
897 /* FIXME: handle raw lookup */
899 if (body->valid == OBD_MD_FLID) {
900 struct mds_body *mds_reply;
901 int size = sizeof(*mds_reply);
903 // The user requested ONLY the inode number, so do a raw lookup
904 rc = lustre_pack_reply(req, 1, &size, NULL);
906 CERROR("out of memory\n");
910 rc = dir->i_op->lookup_raw(dir, name, namesize - 1, &inum);
912 mds_reply = lustre_msg_buf(req->rq_repmsg, offset,
914 mds_reply->fid1.id = inum;
915 mds_reply->valid = OBD_MD_FLID;
920 if (lustre_handle_is_used(child_lockh)) {
921 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT);
925 if (resent_req == 0) {
927 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RESEND, obd_timeout * 2);
928 rc = mds_get_parent_child_locked(obd, &obd->u.mds,
932 MDS_INODELOCK_UPDATE,
934 child_lockh, &dchild,
937 /* For revalidate by fid we always take UPDATE lock */
938 dchild = mds_fid2locked_dentry(obd, &body->fid2, NULL,
943 rc = PTR_ERR(dchild);
948 struct ldlm_lock *granted_lock;
949 struct ll_fid child_fid;
950 struct ldlm_resource *res;
951 DEBUG_REQ(D_DLMTRACE, req, "resent, not enqueuing new locks");
952 granted_lock = ldlm_handle2lock(child_lockh);
953 LASSERTF(granted_lock != NULL, LPU64"/%u lockh "LPX64"\n",
954 body->fid1.id, body->fid1.generation,
955 child_lockh->cookie);
958 res = granted_lock->l_resource;
959 child_fid.id = res->lr_name.name[0];
960 child_fid.generation = res->lr_name.name[1];
961 dchild = mds_fid2dentry(&obd->u.mds, &child_fid, NULL);
962 LASSERT(!IS_ERR(dchild));
963 LDLM_LOCK_PUT(granted_lock);
966 cleanup_phase = 2; /* dchild, dparent, locks */
968 if (dchild->d_inode == NULL) {
969 intent_set_disposition(rep, DISP_LOOKUP_NEG);
970 /* in the intent case, the policy clears this error:
971 the disposition is enough */
972 GOTO(cleanup, rc = -ENOENT);
974 intent_set_disposition(rep, DISP_LOOKUP_POS);
977 if (req->rq_repmsg == NULL) {
978 rc = mds_getattr_pack_msg(req, dchild->d_inode, offset);
980 CERROR ("mds_getattr_pack_msg: %d\n", rc);
985 rc = mds_getattr_internal(obd, dchild, req, body, offset);
986 GOTO(cleanup, rc); /* returns the lock to the client */
989 switch (cleanup_phase) {
991 if (resent_req == 0) {
992 if (rc && dchild->d_inode)
993 ldlm_lock_decref(child_lockh, LCK_CR);
995 ldlm_lock_decref(&parent_lockh, LCK_CR);
1001 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1003 mds_exit_ucred(&uc, mds);
1004 if (req->rq_reply_state == NULL) {
1005 int rc2 = lustre_pack_reply(req, 1, NULL, NULL);
1008 req->rq_status = rc;
1014 static int mds_getattr(struct ptlrpc_request *req, int offset)
1016 struct mds_obd *mds = mds_req2mds(req);
1017 struct obd_device *obd = req->rq_export->exp_obd;
1018 struct lvfs_run_ctxt saved;
1020 struct mds_body *body;
1021 struct lvfs_ucred uc = {0,};
1025 OBD_COUNTER_INCREMENT(obd, getattr);
1027 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1028 lustre_swab_mds_body);
1032 rc = mds_init_ucred(&uc, req, offset);
1034 GOTO(out_ucred, rc);
1036 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1037 de = mds_fid2dentry(mds, &body->fid1, NULL);
1039 rc = req->rq_status = PTR_ERR(de);
1043 rc = mds_getattr_pack_msg(req, de->d_inode, offset);
1045 CERROR("mds_getattr_pack_msg: %d\n", rc);
1049 req->rq_status = mds_getattr_internal(obd, de, req, body,
1055 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1057 if (req->rq_reply_state == NULL) {
1058 int rc2 = lustre_pack_reply(req, 1, NULL, NULL);
1061 req->rq_status = rc;
1063 mds_exit_ucred(&uc, mds);
1067 static int mds_obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1072 spin_lock(&obd->obd_osfs_lock);
1073 rc = fsfilt_statfs(obd, obd->u.obt.obt_sb, max_age);
1075 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1076 spin_unlock(&obd->obd_osfs_lock);
1081 static int mds_statfs(struct ptlrpc_request *req)
1083 struct obd_device *obd = req->rq_export->exp_obd;
1084 int rc, size[2] = { sizeof(struct ptlrpc_body),
1085 sizeof(struct obd_statfs) };
1088 /* This will trigger a watchdog timeout */
1089 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_STATFS_LCW_SLEEP,
1090 (MDS_SERVICE_WATCHDOG_TIMEOUT / 1000) + 1);
1091 OBD_COUNTER_INCREMENT(obd, statfs);
1093 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK))
1094 GOTO(out, rc = -ENOMEM);
1095 rc = lustre_pack_reply(req, 2, size, NULL);
1099 /* We call this so that we can cache a bit - 1 jiffie worth */
1100 rc = mds_obd_statfs(obd, lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1101 size[REPLY_REC_OFF]),
1102 cfs_time_current_64() - HZ);
1104 CERROR("mds_obd_statfs failed: rc %d\n", rc);
1110 req->rq_status = rc;
1114 static int mds_sync(struct ptlrpc_request *req, int offset)
1116 struct obd_device *obd = req->rq_export->exp_obd;
1117 struct mds_obd *mds = &obd->u.mds;
1118 struct mds_body *body;
1119 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
1122 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1123 lustre_swab_mds_body);
1125 GOTO(out, rc = -EFAULT);
1127 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK))
1128 GOTO(out, rc = -ENOMEM);
1129 rc = lustre_pack_reply(req, 2, size, NULL);
1133 if (body->fid1.id == 0) {
1134 /* a fid of zero is taken to mean "sync whole filesystem" */
1135 rc = fsfilt_sync(obd, obd->u.obt.obt_sb);
1140 de = mds_fid2dentry(mds, &body->fid1, NULL);
1142 GOTO(out, rc = PTR_ERR(de));
1144 /* The file parameter isn't used for anything */
1145 if (de->d_inode->i_fop && de->d_inode->i_fop->fsync)
1146 rc = de->d_inode->i_fop->fsync(NULL, de, 1);
1148 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1150 mds_pack_inode2fid(&body->fid1, de->d_inode);
1151 mds_pack_inode2body(body, de->d_inode);
1158 req->rq_status = rc;
1162 /* mds_readpage does not take a DLM lock on the inode, because the client must
1163 * already have a PR lock.
1165 * If we were to take another one here, a deadlock will result, if another
1166 * thread is already waiting for a PW lock. */
1167 static int mds_readpage(struct ptlrpc_request *req, int offset)
1169 struct obd_device *obd = req->rq_export->exp_obd;
1170 struct mds_obd *mds = &obd->u.mds;
1171 struct vfsmount *mnt;
1174 struct mds_body *body, *repbody;
1175 struct lvfs_run_ctxt saved;
1176 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*repbody) };
1177 struct lvfs_ucred uc = {0,};
1180 OBD_FAIL_RETURN(OBD_FAIL_MDS_READPAGE_PACK, -ENOMEM);
1181 rc = lustre_pack_reply(req, 2, size, NULL);
1185 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1186 lustre_swab_mds_body);
1188 GOTO (out, rc = -EFAULT);
1190 rc = mds_init_ucred(&uc, req, offset);
1194 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1195 de = mds_fid2dentry(&obd->u.mds, &body->fid1, &mnt);
1197 GOTO(out_pop, rc = PTR_ERR(de));
1199 CDEBUG(D_INODE, "ino %lu\n", de->d_inode->i_ino);
1201 file = dentry_open(de, mnt, O_RDONLY | O_LARGEFILE);
1202 /* note: in case of an error, dentry_open puts dentry */
1204 GOTO(out_pop, rc = PTR_ERR(file));
1206 /* body->size is actually the offset -eeb */
1207 if ((body->size & (de->d_inode->i_sb->s_blocksize - 1)) != 0) {
1208 CERROR("offset "LPU64" not on a block boundary of %lu\n",
1209 body->size, de->d_inode->i_sb->s_blocksize);
1210 GOTO(out_file, rc = -EFAULT);
1213 /* body->nlink is actually the #bytes to read -eeb */
1214 if (body->nlink & (de->d_inode->i_sb->s_blocksize - 1)) {
1215 CERROR("size %u is not multiple of blocksize %lu\n",
1216 body->nlink, de->d_inode->i_sb->s_blocksize);
1217 GOTO(out_file, rc = -EFAULT);
1220 repbody = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1222 repbody->size = i_size_read(file->f_dentry->d_inode);
1223 repbody->valid = OBD_MD_FLSIZE;
1225 /* to make this asynchronous make sure that the handling function
1226 doesn't send a reply when this function completes. Instead a
1227 callback function would send the reply */
1228 /* body->size is actually the offset -eeb */
1229 rc = mds_sendpage(req, file, body->size, body->nlink);
1232 filp_close(file, 0);
1234 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1236 mds_exit_ucred(&uc, mds);
1237 req->rq_status = rc;
1241 int mds_reint(struct ptlrpc_request *req, int offset,
1242 struct lustre_handle *lockh)
1244 struct mds_update_record *rec; /* 116 bytes on the stack? no sir! */
1247 OBD_ALLOC(rec, sizeof(*rec));
1251 rc = mds_update_unpack(req, offset, rec);
1252 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNPACK)) {
1253 CERROR("invalid record\n");
1254 GOTO(out, req->rq_status = -EINVAL);
1257 /* rc will be used to interrupt a for loop over multiple records */
1258 rc = mds_reint_rec(rec, offset, req, lockh);
1260 OBD_FREE(rec, sizeof(*rec));
1264 int mds_filter_recovery_request(struct ptlrpc_request *req,
1265 struct obd_device *obd, int *process)
1267 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1268 case MDS_CONNECT: /* This will never get here, but for completeness. */
1269 case OST_CONNECT: /* This will never get here, but for completeness. */
1270 case MDS_DISCONNECT:
1271 case OST_DISCONNECT:
1276 case MDS_DONE_WRITING:
1277 case MDS_SYNC: /* used in unmounting */
1283 *process = target_queue_recovery_request(req, obd);
1287 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
1292 EXPORT_SYMBOL(mds_filter_recovery_request);
1294 static char *reint_names[] = {
1295 [REINT_SETATTR] "setattr",
1296 [REINT_CREATE] "create",
1297 [REINT_LINK] "link",
1298 [REINT_UNLINK] "unlink",
1299 [REINT_RENAME] "rename",
1300 [REINT_OPEN] "open",
1303 static int mds_set_info_rpc(struct obd_export *exp, struct ptlrpc_request *req)
1306 int keylen, vallen, rc = 0;
1309 key = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, 1);
1311 DEBUG_REQ(D_HA, req, "no set_info key");
1314 keylen = lustre_msg_buflen(req->rq_reqmsg, REQ_REC_OFF);
1316 val = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 1, 0);
1317 vallen = lustre_msg_buflen(req->rq_reqmsg, REQ_REC_OFF + 1);
1319 rc = lustre_pack_reply(req, 1, NULL, NULL);
1323 lustre_msg_set_status(req->rq_repmsg, 0);
1325 if (KEY_IS("read-only")) {
1326 if (val == NULL || vallen < sizeof(__u32)) {
1327 DEBUG_REQ(D_HA, req, "no set_info val");
1332 exp->exp_connect_flags |= OBD_CONNECT_RDONLY;
1334 exp->exp_connect_flags &= ~OBD_CONNECT_RDONLY;
1342 static int mds_handle_quotacheck(struct ptlrpc_request *req)
1344 struct obd_quotactl *oqctl;
1348 oqctl = lustre_swab_reqbuf(req, REQ_REC_OFF, sizeof(*oqctl),
1349 lustre_swab_obd_quotactl);
1353 rc = lustre_pack_reply(req, 1, NULL, NULL);
1357 req->rq_status = obd_quotacheck(req->rq_export, oqctl);
1361 static int mds_handle_quotactl(struct ptlrpc_request *req)
1363 struct obd_quotactl *oqctl, *repoqc;
1364 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*repoqc) };
1367 oqctl = lustre_swab_reqbuf(req, REQ_REC_OFF, sizeof(*oqctl),
1368 lustre_swab_obd_quotactl);
1372 rc = lustre_pack_reply(req, 2, size, NULL);
1376 repoqc = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*repoqc));
1378 req->rq_status = obd_quotactl(req->rq_export, oqctl);
1383 int mds_msg_check_version(struct lustre_msg *msg)
1387 switch (lustre_msg_get_opc(msg)) {
1389 case MDS_DISCONNECT:
1392 case SEC_CTX_INIT_CONT:
1394 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
1396 CERROR("bad opc %u version %08x, expecting %08x\n",
1397 lustre_msg_get_opc(msg),
1398 lustre_msg_get_version(msg),
1399 LUSTRE_OBD_VERSION);
1403 case MDS_GETATTR_NAME:
1410 case MDS_DONE_WRITING:
1416 case MDS_QUOTACHECK:
1422 rc = lustre_msg_check_version(msg, LUSTRE_MDS_VERSION);
1424 CERROR("bad opc %u version %08x, expecting %08x\n",
1425 lustre_msg_get_opc(msg),
1426 lustre_msg_get_version(msg),
1427 LUSTRE_MDS_VERSION);
1431 case LDLM_BL_CALLBACK:
1432 case LDLM_CP_CALLBACK:
1433 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1435 CERROR("bad opc %u version %08x, expecting %08x\n",
1436 lustre_msg_get_opc(msg),
1437 lustre_msg_get_version(msg),
1438 LUSTRE_DLM_VERSION);
1440 case OBD_LOG_CANCEL:
1441 case LLOG_ORIGIN_HANDLE_CREATE:
1442 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1443 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1444 case LLOG_ORIGIN_HANDLE_CLOSE:
1445 case LLOG_ORIGIN_HANDLE_DESTROY:
1446 case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1448 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1450 CERROR("bad opc %u version %08x, expecting %08x\n",
1451 lustre_msg_get_opc(msg),
1452 lustre_msg_get_version(msg),
1453 LUSTRE_LOG_VERSION);
1456 CERROR("MDS unknown opcode %d\n", lustre_msg_get_opc(msg));
1461 EXPORT_SYMBOL(mds_msg_check_version);
1463 int mds_handle(struct ptlrpc_request *req)
1465 int should_process, fail = OBD_FAIL_MDS_ALL_REPLY_NET;
1467 struct mds_obd *mds = NULL; /* quell gcc overwarning */
1468 struct obd_device *obd = NULL;
1471 OBD_FAIL_RETURN(OBD_FAIL_MDS_ALL_REQUEST_NET | OBD_FAIL_ONCE, 0);
1473 LASSERT(current->journal_info == NULL);
1475 rc = mds_msg_check_version(req->rq_reqmsg);
1477 CERROR("MDS drop mal-formed request\n");
1481 /* XXX identical to OST */
1482 if (lustre_msg_get_opc(req->rq_reqmsg) != MDS_CONNECT) {
1483 struct mds_export_data *med;
1486 if (req->rq_export == NULL) {
1487 CERROR("operation %d on unconnected MDS from %s\n",
1488 lustre_msg_get_opc(req->rq_reqmsg),
1489 libcfs_id2str(req->rq_peer));
1490 req->rq_status = -ENOTCONN;
1491 GOTO(out, rc = -ENOTCONN);
1494 med = &req->rq_export->exp_mds_data;
1495 obd = req->rq_export->exp_obd;
1496 mds = mds_req2mds(req);
1498 /* sanity check: if the xid matches, the request must
1499 * be marked as a resent or replayed */
1500 if (req->rq_xid == le64_to_cpu(med->med_mcd->mcd_last_xid) ||
1501 req->rq_xid == le64_to_cpu(med->med_mcd->mcd_last_close_xid))
1502 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
1503 (MSG_RESENT | MSG_REPLAY))) {
1504 CERROR("rq_xid "LPU64" matches last_xid, "
1505 "expected RESENT flag\n",
1507 req->rq_status = -ENOTCONN;
1508 GOTO(out, rc = -EFAULT);
1510 /* else: note the opposite is not always true; a
1511 * RESENT req after a failover will usually not match
1512 * the last_xid, since it was likely never
1513 * committed. A REPLAYed request will almost never
1514 * match the last xid, however it could for a
1515 * committed, but still retained, open. */
1517 /* Check for aborted recovery. */
1518 spin_lock_bh(&obd->obd_processing_task_lock);
1519 recovering = obd->obd_recovering;
1520 spin_unlock_bh(&obd->obd_processing_task_lock);
1522 rc = mds_filter_recovery_request(req, obd,
1524 if (rc || !should_process)
1526 else if (should_process < 0) {
1527 req->rq_status = should_process;
1528 rc = ptlrpc_error(req);
1534 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1536 DEBUG_REQ(D_INODE, req, "connect");
1537 OBD_FAIL_RETURN(OBD_FAIL_MDS_CONNECT_NET, 0);
1538 rc = target_handle_connect(req);
1540 /* Now that we have an export, set mds. */
1542 * XXX nikita: these assignments are useless: mds is
1543 * never used below, and obd is only used for
1544 * MSG_LAST_REPLAY case, which never happens for
1547 obd = req->rq_export->exp_obd;
1548 mds = mds_req2mds(req);
1552 case MDS_DISCONNECT:
1553 DEBUG_REQ(D_INODE, req, "disconnect");
1554 OBD_FAIL_RETURN(OBD_FAIL_MDS_DISCONNECT_NET, 0);
1555 rc = target_handle_disconnect(req);
1556 req->rq_status = rc; /* superfluous? */
1560 DEBUG_REQ(D_INODE, req, "getstatus");
1561 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETSTATUS_NET, 0);
1562 rc = mds_getstatus(req);
1566 DEBUG_REQ(D_INODE, req, "getattr");
1567 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NET, 0);
1568 rc = mds_getattr(req, REQ_REC_OFF);
1572 DEBUG_REQ(D_INODE, req, "setxattr");
1573 OBD_FAIL_RETURN(OBD_FAIL_MDS_SETXATTR_NET, 0);
1574 rc = mds_setxattr(req);
1578 DEBUG_REQ(D_INODE, req, "getxattr");
1579 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETXATTR_NET, 0);
1580 rc = mds_getxattr(req);
1583 case MDS_GETATTR_NAME: {
1584 struct lustre_handle lockh = { 0 };
1585 DEBUG_REQ(D_INODE, req, "getattr_name");
1586 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NAME_NET, 0);
1588 /* If this request gets a reconstructed reply, we won't be
1589 * acquiring any new locks in mds_getattr_lock, so we don't
1592 rc = mds_getattr_lock(req, REQ_REC_OFF, MDS_INODELOCK_UPDATE,
1594 /* this non-intent call (from an ioctl) is special */
1595 req->rq_status = rc;
1596 if (rc == 0 && lustre_handle_is_used(&lockh))
1597 ldlm_lock_decref(&lockh, LCK_CR);
1601 DEBUG_REQ(D_INODE, req, "statfs");
1602 OBD_FAIL_RETURN(OBD_FAIL_MDS_STATFS_NET, 0);
1603 rc = mds_statfs(req);
1607 DEBUG_REQ(D_INODE, req, "readpage");
1608 OBD_FAIL_RETURN(OBD_FAIL_MDS_READPAGE_NET, 0);
1609 rc = mds_readpage(req, REQ_REC_OFF);
1611 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_SENDPAGE)) {
1618 __u32 *opcp = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF,
1621 int size[4] = { sizeof(struct ptlrpc_body),
1622 sizeof(struct mds_body),
1623 mds->mds_max_mdsize,
1624 mds->mds_max_cookiesize };
1627 /* NB only peek inside req now; mds_reint() will swab it */
1629 CERROR ("Can't inspect opcode\n");
1634 if (lustre_msg_swabbed(req->rq_reqmsg))
1637 DEBUG_REQ(D_INODE, req, "reint %d (%s)", opc,
1638 (opc < sizeof(reint_names) / sizeof(reint_names[0]) ||
1639 reint_names[opc] == NULL) ? reint_names[opc] :
1642 OBD_FAIL_RETURN(OBD_FAIL_MDS_REINT_NET, 0);
1644 if (opc == REINT_UNLINK || opc == REINT_RENAME)
1646 else if (opc == REINT_OPEN)
1651 rc = lustre_pack_reply(req, bufcount, size, NULL);
1655 rc = mds_reint(req, REQ_REC_OFF, NULL);
1656 fail = OBD_FAIL_MDS_REINT_NET_REP;
1661 DEBUG_REQ(D_INODE, req, "close");
1662 OBD_FAIL_RETURN(OBD_FAIL_MDS_CLOSE_NET, 0);
1663 rc = mds_close(req, REQ_REC_OFF);
1666 case MDS_DONE_WRITING:
1667 DEBUG_REQ(D_INODE, req, "done_writing");
1668 OBD_FAIL_RETURN(OBD_FAIL_MDS_DONE_WRITING_NET, 0);
1669 rc = mds_done_writing(req, REQ_REC_OFF);
1673 DEBUG_REQ(D_INODE, req, "pin");
1674 OBD_FAIL_RETURN(OBD_FAIL_MDS_PIN_NET, 0);
1675 rc = mds_pin(req, REQ_REC_OFF);
1679 DEBUG_REQ(D_INODE, req, "sync");
1680 OBD_FAIL_RETURN(OBD_FAIL_MDS_SYNC_NET, 0);
1681 rc = mds_sync(req, REQ_REC_OFF);
1685 DEBUG_REQ(D_INODE, req, "set_info");
1686 rc = mds_set_info_rpc(req->rq_export, req);
1689 case MDS_QUOTACHECK:
1690 DEBUG_REQ(D_INODE, req, "quotacheck");
1691 OBD_FAIL_RETURN(OBD_FAIL_MDS_QUOTACHECK_NET, 0);
1692 rc = mds_handle_quotacheck(req);
1696 DEBUG_REQ(D_INODE, req, "quotactl");
1697 OBD_FAIL_RETURN(OBD_FAIL_MDS_QUOTACTL_NET, 0);
1698 rc = mds_handle_quotactl(req);
1702 DEBUG_REQ(D_INODE, req, "ping");
1703 rc = target_handle_ping(req);
1706 case OBD_LOG_CANCEL:
1707 CDEBUG(D_INODE, "log cancel\n");
1708 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1709 rc = -ENOTSUPP; /* la la la */
1713 DEBUG_REQ(D_INODE, req, "enqueue");
1714 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1715 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1716 ldlm_server_blocking_ast, NULL);
1717 fail = OBD_FAIL_LDLM_REPLY;
1720 DEBUG_REQ(D_INODE, req, "convert");
1721 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1722 rc = ldlm_handle_convert(req);
1724 case LDLM_BL_CALLBACK:
1725 case LDLM_CP_CALLBACK:
1726 DEBUG_REQ(D_INODE, req, "callback");
1727 CERROR("callbacks should not happen on MDS\n");
1729 OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
1731 case LLOG_ORIGIN_HANDLE_CREATE:
1732 DEBUG_REQ(D_INODE, req, "llog_init");
1733 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1734 rc = llog_origin_handle_create(req);
1736 case LLOG_ORIGIN_HANDLE_DESTROY:
1737 DEBUG_REQ(D_INODE, req, "llog_init");
1738 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1739 rc = llog_origin_handle_destroy(req);
1741 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1742 DEBUG_REQ(D_INODE, req, "llog next block");
1743 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1744 rc = llog_origin_handle_next_block(req);
1746 case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1747 DEBUG_REQ(D_INODE, req, "llog prev block");
1748 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1749 rc = llog_origin_handle_prev_block(req);
1751 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1752 DEBUG_REQ(D_INODE, req, "llog read header");
1753 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1754 rc = llog_origin_handle_read_header(req);
1756 case LLOG_ORIGIN_HANDLE_CLOSE:
1757 DEBUG_REQ(D_INODE, req, "llog close");
1758 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1759 rc = llog_origin_handle_close(req);
1762 DEBUG_REQ(D_INODE, req, "llog catinfo");
1763 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1764 rc = llog_catinfo(req);
1767 req->rq_status = -ENOTSUPP;
1768 rc = ptlrpc_error(req);
1772 LASSERT(current->journal_info == NULL);
1774 /* If we're DISCONNECTing, the mds_export_data is already freed */
1775 if (!rc && lustre_msg_get_opc(req->rq_reqmsg) != MDS_DISCONNECT) {
1776 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1778 /* I don't think last_xid is used for anyway, so I'm not sure
1779 if we need to care about last_close_xid here.*/
1780 lustre_msg_set_last_xid(req->rq_repmsg,
1781 le64_to_cpu(med->med_mcd->mcd_last_xid));
1783 target_committed_to_req(req);
1789 target_send_reply(req, rc, fail);
1793 /* Update the server data on disk. This stores the new mount_count and
1794 * also the last_rcvd value to disk. If we don't have a clean shutdown,
1795 * then the server last_rcvd value may be less than that of the clients.
1796 * This will alert us that we may need to do client recovery.
1798 * Also assumes for mds_last_transno that we are not modifying it (no locking).
1800 int mds_update_server_data(struct obd_device *obd, int force_sync)
1802 struct mds_obd *mds = &obd->u.mds;
1803 struct lr_server_data *lsd = mds->mds_server_data;
1804 struct file *filp = mds->mds_rcvd_filp;
1805 struct lvfs_run_ctxt saved;
1810 CDEBUG(D_SUPER, "MDS mount_count is "LPU64", last_transno is "LPU64"\n",
1811 mds->mds_mount_count, mds->mds_last_transno);
1813 spin_lock(&mds->mds_transno_lock);
1814 lsd->lsd_last_transno = cpu_to_le64(mds->mds_last_transno);
1815 spin_unlock(&mds->mds_transno_lock);
1817 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1818 rc = fsfilt_write_record(obd, filp, lsd, sizeof(*lsd), &off,force_sync);
1819 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1821 CERROR("error writing MDS server data: rc = %d\n", rc);
1825 static void fsoptions_to_mds_flags(struct mds_obd *mds, char *options)
1835 while (*p && *p != ',')
1839 if (len == sizeof("user_xattr") - 1 &&
1840 memcmp(options, "user_xattr", len) == 0) {
1841 mds->mds_fl_user_xattr = 1;
1842 LCONSOLE_INFO("Enabling user_xattr\n");
1843 } else if (len == sizeof("nouser_xattr") - 1 &&
1844 memcmp(options, "nouser_xattr", len) == 0) {
1845 mds->mds_fl_user_xattr = 0;
1846 LCONSOLE_INFO("Disabling user_xattr\n");
1847 } else if (len == sizeof("acl") - 1 &&
1848 memcmp(options, "acl", len) == 0) {
1849 #ifdef CONFIG_FS_POSIX_ACL
1850 mds->mds_fl_acl = 1;
1851 LCONSOLE_INFO("Enabling ACL\n");
1853 CWARN("ignoring unsupported acl mount option\n");
1855 } else if (len == sizeof("noacl") - 1 &&
1856 memcmp(options, "noacl", len) == 0) {
1857 #ifdef CONFIG_FS_POSIX_ACL
1858 mds->mds_fl_acl = 0;
1859 LCONSOLE_INFO("Disabling ACL\n");
1866 static int mds_lov_presetup (struct mds_obd *mds, struct lustre_cfg *lcfg)
1871 rc = llog_start_commit_thread();
1875 if (lcfg->lcfg_bufcount >= 4 && LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
1878 ll_generate_random_uuid(uuid);
1879 class_uuid_unparse(uuid, &mds->mds_lov_uuid);
1881 OBD_ALLOC(mds->mds_profile, LUSTRE_CFG_BUFLEN(lcfg, 3));
1882 if (mds->mds_profile == NULL)
1885 strncpy(mds->mds_profile, lustre_cfg_string(lcfg, 3),
1886 LUSTRE_CFG_BUFLEN(lcfg, 3));
1891 /* mount the file system (secretly). lustre_cfg parameters are:
1897 static int mds_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
1899 struct lprocfs_static_vars lvars;
1900 struct mds_obd *mds = &obd->u.mds;
1901 struct lustre_mount_info *lmi;
1902 struct vfsmount *mnt;
1903 struct lustre_sb_info *lsi;
1904 struct obd_uuid uuid;
1911 /* setup 1:/dev/loop/0 2:ext3 3:mdsA 4:errors=remount-ro,iopen_nopriv */
1913 CLASSERT(offsetof(struct obd_device, u.obt) ==
1914 offsetof(struct obd_device, u.mds.mds_obt));
1916 if (lcfg->lcfg_bufcount < 3)
1919 if (LUSTRE_CFG_BUFLEN(lcfg, 1) == 0 || LUSTRE_CFG_BUFLEN(lcfg, 2) == 0)
1922 lmi = server_get_mount(obd->obd_name);
1924 CERROR("Not mounted in lustre_fill_super?\n");
1928 /* We mounted in lustre_fill_super.
1929 lcfg bufs 1, 2, 4 (device, fstype, mount opts) are ignored.*/
1931 lsi = s2lsi(lmi->lmi_sb);
1932 fsoptions_to_mds_flags(mds, lsi->lsi_ldd->ldd_mount_opts);
1933 fsoptions_to_mds_flags(mds, lsi->lsi_lmd->lmd_opts);
1935 obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
1936 if (IS_ERR(obd->obd_fsops))
1937 GOTO(err_put, rc = PTR_ERR(obd->obd_fsops));
1939 CDEBUG(D_SUPER, "%s: mnt = %p\n", lustre_cfg_string(lcfg, 1), mnt);
1941 LASSERT(!lvfs_check_rdonly(lvfs_sbdev(mnt->mnt_sb)));
1943 sema_init(&mds->mds_epoch_sem, 1);
1944 spin_lock_init(&mds->mds_transno_lock);
1945 mds->mds_max_mdsize = sizeof(struct lov_mds_md);
1946 mds->mds_max_cookiesize = sizeof(struct llog_cookie);
1947 mds->mds_atime_diff = MAX_ATIME_DIFF;
1948 mds->mds_evict_ost_nids = 1;
1950 sprintf(ns_name, "mds-%s", obd->obd_uuid.uuid);
1951 obd->obd_namespace = ldlm_namespace_new(ns_name, LDLM_NAMESPACE_SERVER,
1952 LDLM_NAMESPACE_GREEDY);
1953 if (obd->obd_namespace == NULL) {
1955 GOTO(err_ops, rc = -ENOMEM);
1957 ldlm_register_intent(obd->obd_namespace, mds_intent_policy);
1959 lprocfs_init_vars(mds, &lvars);
1960 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0 &&
1961 lprocfs_alloc_obd_stats(obd, LPROC_MDS_LAST) == 0) {
1962 /* Init private stats here */
1963 mds_stats_counter_init(obd->obd_stats);
1964 obd->obd_proc_exports = proc_mkdir("exports",
1965 obd->obd_proc_entry);
1968 rc = mds_fs_setup(obd, mnt);
1970 CERROR("%s: MDS filesystem method init failed: rc = %d\n",
1975 rc = mds_lov_presetup(mds, lcfg);
1979 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1980 "mds_ldlm_client", &obd->obd_ldlm_client);
1981 obd->obd_replayable = 1;
1983 rc = lquota_setup(mds_quota_interface_ref, obd);
1988 mds->mds_group_hash = upcall_cache_init(obd->obd_name);
1989 if (IS_ERR(mds->mds_group_hash)) {
1990 rc = PTR_ERR(mds->mds_group_hash);
1991 mds->mds_group_hash = NULL;
1992 GOTO(err_qctxt, rc);
1996 /* Don't wait for mds_postrecov trying to clear orphans */
1997 obd->obd_async_recov = 1;
1998 rc = mds_postsetup(obd);
1999 /* Bug 11557 - allow async abort_recov start
2000 FIXME can remove most of this obd_async_recov plumbing
2001 obd->obd_async_recov = 0;
2004 GOTO(err_qctxt, rc);
2006 uuid_ptr = fsfilt_uuid(obd, obd->u.obt.obt_sb);
2007 if (uuid_ptr != NULL) {
2008 class_uuid_unparse(uuid_ptr, &uuid);
2014 label = fsfilt_get_label(obd, obd->u.obt.obt_sb);
2015 if (obd->obd_recovering) {
2016 LCONSOLE_WARN("MDT %s now serving %s (%s%s%s), but will be in "
2017 "recovery until %d %s reconnect, or if no clients"
2018 " reconnect for %d:%.02d; during that time new "
2019 "clients will not be allowed to connect. "
2020 "Recovery progress can be monitored by watching "
2021 "/proc/fs/lustre/mds/%s/recovery_status.\n",
2022 obd->obd_name, lustre_cfg_string(lcfg, 1),
2023 label ?: "", label ? "/" : "", str,
2024 obd->obd_max_recoverable_clients,
2025 (obd->obd_max_recoverable_clients == 1) ?
2026 "client" : "clients",
2027 (int)(OBD_RECOVERY_TIMEOUT) / 60,
2028 (int)(OBD_RECOVERY_TIMEOUT) % 60,
2031 LCONSOLE_INFO("MDT %s now serving %s (%s%s%s) with recovery "
2032 "%s\n", obd->obd_name, lustre_cfg_string(lcfg, 1),
2033 label ?: "", label ? "/" : "", str,
2034 obd->obd_replayable ? "enabled" : "disabled");
2037 if (ldlm_timeout == LDLM_TIMEOUT_DEFAULT)
2043 lquota_cleanup(mds_quota_interface_ref, obd);
2045 /* No extra cleanup needed for llog_init_commit_thread() */
2046 mds_fs_cleanup(obd);
2048 upcall_cache_cleanup(mds->mds_group_hash);
2049 mds->mds_group_hash = NULL;
2052 lprocfs_obd_cleanup(obd);
2053 lprocfs_free_obd_stats(obd);
2054 ldlm_namespace_free(obd->obd_namespace, 0);
2055 obd->obd_namespace = NULL;
2057 fsfilt_put_ops(obd->obd_fsops);
2059 server_put_mount(obd->obd_name, mnt);
2060 obd->u.obt.obt_sb = NULL;
2064 static int mds_lov_clean(struct obd_device *obd)
2066 struct mds_obd *mds = &obd->u.mds;
2067 struct obd_device *osc = mds->mds_osc_obd;
2070 if (mds->mds_profile) {
2071 class_del_profile(mds->mds_profile);
2072 OBD_FREE(mds->mds_profile, strlen(mds->mds_profile) + 1);
2073 mds->mds_profile = NULL;
2076 /* There better be a lov */
2080 RETURN(PTR_ERR(osc));
2082 obd_register_observer(osc, NULL);
2084 /* Give lov our same shutdown flags */
2085 osc->obd_force = obd->obd_force;
2086 osc->obd_fail = obd->obd_fail;
2088 /* Cleanup the lov */
2089 obd_disconnect(mds->mds_osc_exp);
2090 class_manual_cleanup(osc);
2091 mds->mds_osc_exp = NULL;
2096 static int mds_postsetup(struct obd_device *obd)
2098 struct mds_obd *mds = &obd->u.mds;
2102 rc = llog_setup(obd, NULL, LLOG_CONFIG_ORIG_CTXT, obd, 0, NULL,
2107 rc = llog_setup(obd, NULL, LLOG_LOVEA_ORIG_CTXT, obd, 0, NULL,
2112 if (mds->mds_profile) {
2113 struct lustre_profile *lprof;
2114 /* The profile defines which osc and mdc to connect to, for a
2115 client. We reuse that here to figure out the name of the
2116 lov to use (and ignore lprof->lp_md).
2117 The profile was set in the config log with
2118 LCFG_MOUNTOPT profilenm oscnm mdcnm */
2119 lprof = class_get_profile(mds->mds_profile);
2120 if (lprof == NULL) {
2121 CERROR("No profile found: %s\n", mds->mds_profile);
2122 GOTO(err_cleanup, rc = -ENOENT);
2124 rc = mds_lov_connect(obd, lprof->lp_dt);
2126 GOTO(err_cleanup, rc);
2133 llog_cleanup(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT));
2134 llog_cleanup(llog_get_context(obd, LLOG_LOVEA_ORIG_CTXT));
2138 int mds_postrecov(struct obd_device *obd)
2146 LASSERT(!obd->obd_recovering);
2147 LASSERT(llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT) != NULL);
2149 /* set nextid first, so we are sure it happens */
2150 mutex_down(&obd->obd_dev_sem);
2151 rc = mds_lov_set_nextid(obd);
2152 mutex_up(&obd->obd_dev_sem);
2154 CERROR("%s: mds_lov_set_nextid failed %d\n",
2159 /* clean PENDING dir */
2160 if (strncmp(obd->obd_name, MDD_OBD_NAME, strlen(MDD_OBD_NAME)))
2161 rc = mds_cleanup_pending(obd);
2165 /* FIXME Does target_finish_recovery really need this to block? */
2166 /* Notify the LOV, which will in turn call mds_notify for each tgt */
2167 /* This means that we have to hack obd_notify to think we're obd_set_up
2168 during mds_lov_connect. */
2169 obd_notify(obd->u.mds.mds_osc_obd, NULL,
2170 obd->obd_async_recov ? OBD_NOTIFY_SYNC_NONBLOCK :
2171 OBD_NOTIFY_SYNC, NULL);
2173 /* quota recovery */
2174 lquota_recovery(mds_quota_interface_ref, obd);
2180 /* We need to be able to stop an mds_lov_synchronize */
2181 static int mds_lov_early_clean(struct obd_device *obd)
2183 struct mds_obd *mds = &obd->u.mds;
2184 struct obd_device *osc = mds->mds_osc_obd;
2186 if (!osc || (!obd->obd_force && !obd->obd_fail))
2189 CDEBUG(D_HA, "abort inflight\n");
2190 return (obd_precleanup(osc, OBD_CLEANUP_EARLY));
2193 static int mds_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2199 case OBD_CLEANUP_EARLY:
2201 case OBD_CLEANUP_EXPORTS:
2202 /*XXX Use this for mdd mds cleanup, so comment out
2203 *this target_cleanup_recovery for this tmp MDD MDS
2205 if (strncmp(obd->obd_name, MDD_OBD_NAME, strlen(MDD_OBD_NAME)))
2206 target_cleanup_recovery(obd);
2207 mds_lov_early_clean(obd);
2209 case OBD_CLEANUP_SELF_EXP:
2210 mds_lov_disconnect(obd);
2212 llog_cleanup(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT));
2213 llog_cleanup(llog_get_context(obd, LLOG_LOVEA_ORIG_CTXT));
2214 rc = obd_llog_finish(obd, 0);
2216 case OBD_CLEANUP_OBD:
2222 static int mds_cleanup(struct obd_device *obd)
2224 struct mds_obd *mds = &obd->u.mds;
2225 lvfs_sbdev_type save_dev;
2228 if (obd->u.obt.obt_sb == NULL)
2230 save_dev = lvfs_sbdev(obd->u.obt.obt_sb);
2232 if (mds->mds_osc_exp)
2233 /* lov export was disconnected by mds_lov_clean;
2234 we just need to drop our ref */
2235 class_export_put(mds->mds_osc_exp);
2237 lprocfs_obd_cleanup(obd);
2238 lprocfs_free_obd_stats(obd);
2240 lquota_cleanup(mds_quota_interface_ref, obd);
2242 mds_update_server_data(obd, 1);
2244 mds_lov_destroy_objids(obd);
2246 mds_fs_cleanup(obd);
2249 upcall_cache_cleanup(mds->mds_group_hash);
2250 mds->mds_group_hash = NULL;
2253 server_put_mount(obd->obd_name, mds->mds_vfsmnt);
2254 obd->u.obt.obt_sb = NULL;
2256 ldlm_namespace_free(obd->obd_namespace, obd->obd_force);
2258 spin_lock_bh(&obd->obd_processing_task_lock);
2259 if (obd->obd_recovering) {
2260 target_cancel_recovery_timer(obd);
2261 obd->obd_recovering = 0;
2263 spin_unlock_bh(&obd->obd_processing_task_lock);
2265 fsfilt_put_ops(obd->obd_fsops);
2267 LCONSOLE_INFO("MDT %s has stopped.\n", obd->obd_name);
2272 static void fixup_handle_for_resent_req(struct ptlrpc_request *req, int offset,
2273 struct ldlm_lock *new_lock,
2274 struct ldlm_lock **old_lock,
2275 struct lustre_handle *lockh)
2277 struct obd_export *exp = req->rq_export;
2278 struct ldlm_request *dlmreq =
2279 lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*dlmreq));
2280 struct lustre_handle remote_hdl = dlmreq->lock_handle[0];
2281 struct list_head *iter;
2283 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
2286 spin_lock(&exp->exp_ldlm_data.led_lock);
2287 list_for_each(iter, &exp->exp_ldlm_data.led_held_locks) {
2288 struct ldlm_lock *lock;
2289 lock = list_entry(iter, struct ldlm_lock, l_export_chain);
2290 if (lock == new_lock)
2292 if (lock->l_remote_handle.cookie == remote_hdl.cookie) {
2293 lockh->cookie = lock->l_handle.h_cookie;
2294 LDLM_DEBUG(lock, "restoring lock cookie");
2295 DEBUG_REQ(D_DLMTRACE, req,"restoring lock cookie "LPX64,
2298 *old_lock = LDLM_LOCK_GET(lock);
2299 spin_unlock(&exp->exp_ldlm_data.led_lock);
2303 spin_unlock(&exp->exp_ldlm_data.led_lock);
2305 /* If the xid matches, then we know this is a resent request,
2306 * and allow it. (It's probably an OPEN, for which we don't
2309 le64_to_cpu(exp->exp_mds_data.med_mcd->mcd_last_xid))
2313 le64_to_cpu(exp->exp_mds_data.med_mcd->mcd_last_close_xid))
2316 /* This remote handle isn't enqueued, so we never received or
2317 * processed this request. Clear MSG_RESENT, because it can
2318 * be handled like any normal request now. */
2320 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
2322 DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle "LPX64,
2326 int intent_disposition(struct ldlm_reply *rep, int flag)
2330 return (rep->lock_policy_res1 & flag);
2333 void intent_set_disposition(struct ldlm_reply *rep, int flag)
2337 rep->lock_policy_res1 |= flag;
2340 static int mds_intent_policy(struct ldlm_namespace *ns,
2341 struct ldlm_lock **lockp, void *req_cookie,
2342 ldlm_mode_t mode, int flags, void *data)
2344 struct ptlrpc_request *req = req_cookie;
2345 struct ldlm_lock *lock = *lockp;
2346 struct ldlm_intent *it;
2347 struct mds_obd *mds = &req->rq_export->exp_obd->u.mds;
2348 struct ldlm_reply *rep;
2349 struct lustre_handle lockh = { 0 };
2350 struct ldlm_lock *new_lock = NULL;
2351 int getattr_part = MDS_INODELOCK_UPDATE;
2352 int repsize[5] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
2353 [DLM_LOCKREPLY_OFF] = sizeof(struct ldlm_reply),
2354 [DLM_REPLY_REC_OFF] = sizeof(struct mds_body),
2355 [DLM_REPLY_REC_OFF+1] = mds->mds_max_mdsize };
2356 int repbufcnt = 4, rc;
2359 LASSERT(req != NULL);
2361 if (lustre_msg_bufcount(req->rq_reqmsg) <= DLM_INTENT_IT_OFF) {
2362 /* No intent was provided */
2363 rc = lustre_pack_reply(req, 2, repsize, NULL);
2369 it = lustre_swab_reqbuf(req, DLM_INTENT_IT_OFF, sizeof(*it),
2370 lustre_swab_ldlm_intent);
2372 CERROR("Intent missing\n");
2373 RETURN(req->rq_status = -EFAULT);
2376 LDLM_DEBUG(lock, "intent policy, opc: %s", ldlm_it2str(it->opc));
2378 if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
2379 (it->opc & (IT_OPEN | IT_GETATTR | IT_LOOKUP)))
2380 /* we should never allow OBD_CONNECT_ACL if not configured */
2381 repsize[repbufcnt++] = LUSTRE_POSIX_ACL_MAX_SIZE;
2382 else if (it->opc & IT_UNLINK)
2383 repsize[repbufcnt++] = mds->mds_max_cookiesize;
2385 rc = lustre_pack_reply(req, repbufcnt, repsize, NULL);
2387 RETURN(req->rq_status = rc);
2389 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF, sizeof(*rep));
2390 intent_set_disposition(rep, DISP_IT_EXECD);
2393 /* execute policy */
2394 switch ((long)it->opc) {
2396 case IT_CREAT|IT_OPEN:
2397 mds_counter_incr(req->rq_export, LPROC_MDS_OPEN);
2398 fixup_handle_for_resent_req(req, DLM_LOCKREQ_OFF, lock, NULL,
2400 /* XXX swab here to assert that an mds_open reint
2401 * packet is following */
2402 rep->lock_policy_res2 = mds_reint(req, DLM_INTENT_REC_OFF,
2405 /* We abort the lock if the lookup was negative and
2406 * we did not make it to the OPEN portion */
2407 if (!intent_disposition(rep, DISP_LOOKUP_EXECD))
2408 RETURN(ELDLM_LOCK_ABORTED);
2409 if (intent_disposition(rep, DISP_LOOKUP_NEG) &&
2410 !intent_disposition(rep, DISP_OPEN_OPEN))
2413 /* If there was an error of some sort or if we are not
2414 * returning any locks */
2415 if (rep->lock_policy_res2 ||
2416 !intent_disposition(rep, DISP_OPEN_LOCK))
2417 RETURN(ELDLM_LOCK_ABORTED);
2420 getattr_part = MDS_INODELOCK_LOOKUP;
2422 getattr_part |= MDS_INODELOCK_LOOKUP;
2423 OBD_COUNTER_INCREMENT(req->rq_export->exp_obd, getattr);
2425 fixup_handle_for_resent_req(req, DLM_LOCKREQ_OFF, lock,
2428 /* INODEBITS_INTEROP: if this lock was converted from a
2429 * plain lock (client does not support inodebits), then
2430 * child lock must be taken with both lookup and update
2431 * bits set for all operations.
2433 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS))
2434 getattr_part = MDS_INODELOCK_LOOKUP |
2435 MDS_INODELOCK_UPDATE;
2437 rep->lock_policy_res2 = mds_getattr_lock(req,DLM_INTENT_REC_OFF,
2438 getattr_part, &lockh);
2439 /* FIXME: LDLM can set req->rq_status. MDS sets
2440 policy_res{1,2} with disposition and status.
2441 - replay: returns 0 & req->status is old status
2442 - otherwise: returns req->status */
2443 if (intent_disposition(rep, DISP_LOOKUP_NEG))
2444 rep->lock_policy_res2 = 0;
2445 if (!intent_disposition(rep, DISP_LOOKUP_POS) ||
2446 rep->lock_policy_res2)
2447 RETURN(ELDLM_LOCK_ABORTED);
2448 if (req->rq_status != 0) {
2450 rep->lock_policy_res2 = req->rq_status;
2451 RETURN(ELDLM_LOCK_ABORTED);
2455 CERROR("Unhandled intent "LPD64"\n", it->opc);
2459 /* By this point, whatever function we called above must have either
2460 * filled in 'lockh', been an intent replay, or returned an error. We
2461 * want to allow replayed RPCs to not get a lock, since we would just
2462 * drop it below anyways because lock replay is done separately by the
2463 * client afterwards. For regular RPCs we want to give the new lock to
2464 * the client instead of whatever lock it was about to get. */
2465 if (new_lock == NULL)
2466 new_lock = ldlm_handle2lock(&lockh);
2467 if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY))
2470 LASSERTF(new_lock != NULL, "op "LPX64" lockh "LPX64"\n",
2471 it->opc, lockh.cookie);
2473 /* If we've already given this lock to a client once, then we should
2474 * have no readers or writers. Otherwise, we should have one reader
2475 * _or_ writer ref (which will be zeroed below) before returning the
2476 * lock to a client. */
2477 if (new_lock->l_export == req->rq_export) {
2478 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
2480 LASSERT(new_lock->l_export == NULL);
2481 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
2486 if (new_lock->l_export == req->rq_export) {
2487 /* Already gave this to the client, which means that we
2488 * reconstructed a reply. */
2489 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
2491 RETURN(ELDLM_LOCK_REPLACED);
2494 /* Fixup the lock to be given to the client */
2495 lock_res_and_lock(new_lock);
2496 new_lock->l_readers = 0;
2497 new_lock->l_writers = 0;
2499 new_lock->l_export = class_export_get(req->rq_export);
2500 spin_lock(&req->rq_export->exp_ldlm_data.led_lock);
2501 list_add(&new_lock->l_export_chain,
2502 &new_lock->l_export->exp_ldlm_data.led_held_locks);
2503 spin_unlock(&req->rq_export->exp_ldlm_data.led_lock);
2505 new_lock->l_blocking_ast = lock->l_blocking_ast;
2506 new_lock->l_completion_ast = lock->l_completion_ast;
2508 memcpy(&new_lock->l_remote_handle, &lock->l_remote_handle,
2509 sizeof(lock->l_remote_handle));
2511 new_lock->l_flags &= ~LDLM_FL_LOCAL;
2513 unlock_res_and_lock(new_lock);
2514 LDLM_LOCK_PUT(new_lock);
2516 RETURN(ELDLM_LOCK_REPLACED);
2519 static int mdt_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
2521 struct mds_obd *mds = &obd->u.mds;
2522 struct lprocfs_static_vars lvars;
2523 int mds_min_threads;
2524 int mds_max_threads;
2528 lprocfs_init_vars(mdt, &lvars);
2529 lprocfs_obd_setup(obd, lvars.obd_vars);
2531 sema_init(&mds->mds_health_sem, 1);
2533 if (mds_num_threads) {
2534 /* If mds_num_threads is set, it is the min and the max. */
2535 if (mds_num_threads > MDS_THREADS_MAX)
2536 mds_num_threads = MDS_THREADS_MAX;
2537 if (mds_num_threads < MDS_THREADS_MIN)
2538 mds_num_threads = MDS_THREADS_MIN;
2539 mds_max_threads = mds_min_threads = mds_num_threads;
2541 /* Base min threads on memory and cpus */
2542 mds_min_threads = num_possible_cpus() * num_physpages >>
2543 (27 - CFS_PAGE_SHIFT);
2544 if (mds_min_threads < MDS_THREADS_MIN)
2545 mds_min_threads = MDS_THREADS_MIN;
2546 /* Largest auto threads start value */
2547 if (mds_min_threads > 32)
2548 mds_min_threads = 32;
2549 mds_max_threads = min(MDS_THREADS_MAX, mds_min_threads * 4);
2553 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2554 MDS_MAXREPSIZE, MDS_REQUEST_PORTAL,
2555 MDC_REPLY_PORTAL, MDS_SERVICE_WATCHDOG_TIMEOUT,
2556 mds_handle, LUSTRE_MDS_NAME,
2557 obd->obd_proc_entry, NULL,
2558 mds_min_threads, mds_max_threads, "ll_mdt", 0);
2560 if (!mds->mds_service) {
2561 CERROR("failed to start service\n");
2562 GOTO(err_lprocfs, rc = -ENOMEM);
2565 rc = ptlrpc_start_threads(obd, mds->mds_service);
2567 GOTO(err_thread, rc);
2569 mds->mds_setattr_service =
2570 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2571 MDS_MAXREPSIZE, MDS_SETATTR_PORTAL,
2572 MDC_REPLY_PORTAL, MDS_SERVICE_WATCHDOG_TIMEOUT,
2573 mds_handle, "mds_setattr",
2574 obd->obd_proc_entry, NULL,
2575 mds_min_threads, mds_max_threads,
2577 if (!mds->mds_setattr_service) {
2578 CERROR("failed to start getattr service\n");
2579 GOTO(err_thread, rc = -ENOMEM);
2582 rc = ptlrpc_start_threads(obd, mds->mds_setattr_service);
2584 GOTO(err_thread2, rc);
2586 mds->mds_readpage_service =
2587 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2588 MDS_MAXREPSIZE, MDS_READPAGE_PORTAL,
2589 MDC_REPLY_PORTAL, MDS_SERVICE_WATCHDOG_TIMEOUT,
2590 mds_handle, "mds_readpage",
2591 obd->obd_proc_entry, NULL,
2592 MDS_THREADS_MIN_READPAGE, mds_max_threads,
2594 if (!mds->mds_readpage_service) {
2595 CERROR("failed to start readpage service\n");
2596 GOTO(err_thread2, rc = -ENOMEM);
2599 rc = ptlrpc_start_threads(obd, mds->mds_readpage_service);
2602 GOTO(err_thread3, rc);
2604 ping_evictor_start();
2609 ptlrpc_unregister_service(mds->mds_readpage_service);
2610 mds->mds_readpage_service = NULL;
2612 ptlrpc_unregister_service(mds->mds_setattr_service);
2613 mds->mds_setattr_service = NULL;
2615 ptlrpc_unregister_service(mds->mds_service);
2616 mds->mds_service = NULL;
2618 lprocfs_obd_cleanup(obd);
2622 static int mdt_cleanup(struct obd_device *obd)
2624 struct mds_obd *mds = &obd->u.mds;
2627 ping_evictor_stop();
2629 down(&mds->mds_health_sem);
2630 ptlrpc_unregister_service(mds->mds_readpage_service);
2631 ptlrpc_unregister_service(mds->mds_setattr_service);
2632 ptlrpc_unregister_service(mds->mds_service);
2633 mds->mds_readpage_service = NULL;
2634 mds->mds_setattr_service = NULL;
2635 mds->mds_service = NULL;
2636 up(&mds->mds_health_sem);
2638 lprocfs_obd_cleanup(obd);
2643 static int mdt_health_check(struct obd_device *obd)
2645 struct mds_obd *mds = &obd->u.mds;
2648 down(&mds->mds_health_sem);
2649 rc |= ptlrpc_service_health_check(mds->mds_readpage_service);
2650 rc |= ptlrpc_service_health_check(mds->mds_setattr_service);
2651 rc |= ptlrpc_service_health_check(mds->mds_service);
2652 up(&mds->mds_health_sem);
2655 * health_check to return 0 on healthy
2656 * and 1 on unhealthy.
2664 static struct dentry *mds_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
2667 struct obd_device *obd = data;
2670 fid.generation = gen;
2671 return mds_fid2dentry(&obd->u.mds, &fid, NULL);
2674 static int mds_health_check(struct obd_device *obd)
2676 struct obd_device_target *odt = &obd->u.obt;
2677 #ifdef USE_HEALTH_CHECK_WRITE
2678 struct mds_obd *mds = &obd->u.mds;
2682 if (odt->obt_sb->s_flags & MS_RDONLY)
2685 #ifdef USE_HEALTH_CHECK_WRITE
2686 LASSERT(mds->mds_health_check_filp != NULL);
2687 rc |= !!lvfs_check_io_health(obd, mds->mds_health_check_filp);
2692 static int mds_process_config(struct obd_device *obd, obd_count len, void *buf)
2694 struct lustre_cfg *lcfg = buf;
2695 struct lprocfs_static_vars lvars;
2698 lprocfs_init_vars(mds, &lvars);
2700 rc = class_process_proc_param(PARAM_MDT, lvars.obd_vars, lcfg, obd);
2704 struct lvfs_callback_ops mds_lvfs_ops = {
2705 l_fid2dentry: mds_lvfs_fid2dentry,
2708 /* use obd ops to offer management infrastructure */
2709 static struct obd_ops mds_obd_ops = {
2710 .o_owner = THIS_MODULE,
2711 .o_connect = mds_connect,
2712 .o_reconnect = mds_reconnect,
2713 .o_init_export = mds_init_export,
2714 .o_destroy_export = mds_destroy_export,
2715 .o_disconnect = mds_disconnect,
2716 .o_setup = mds_setup,
2717 .o_precleanup = mds_precleanup,
2718 .o_cleanup = mds_cleanup,
2719 .o_postrecov = mds_postrecov,
2720 .o_statfs = mds_obd_statfs,
2721 .o_iocontrol = mds_iocontrol,
2722 .o_create = mds_obd_create,
2723 .o_destroy = mds_obd_destroy,
2724 .o_llog_init = mds_llog_init,
2725 .o_llog_finish = mds_llog_finish,
2726 .o_notify = mds_notify,
2727 .o_health_check = mds_health_check,
2728 .o_process_config = mds_process_config,
2731 static struct obd_ops mdt_obd_ops = {
2732 .o_owner = THIS_MODULE,
2733 .o_setup = mdt_setup,
2734 .o_cleanup = mdt_cleanup,
2735 .o_health_check = mdt_health_check,
2738 quota_interface_t *mds_quota_interface_ref;
2739 extern quota_interface_t mds_quota_interface;
2741 static __attribute__((unused)) int __init mds_init(void)
2744 struct lprocfs_static_vars lvars;
2746 request_module("lquota");
2747 mds_quota_interface_ref = PORTAL_SYMBOL_GET(mds_quota_interface);
2748 rc = lquota_init(mds_quota_interface_ref);
2750 if (mds_quota_interface_ref)
2751 PORTAL_SYMBOL_PUT(mds_quota_interface);
2754 init_obd_quota_ops(mds_quota_interface_ref, &mds_obd_ops);
2756 lprocfs_init_vars(mds, &lvars);
2757 class_register_type(&mds_obd_ops, NULL,
2758 lvars.module_vars, LUSTRE_MDS_NAME, NULL);
2759 lprocfs_init_vars(mdt, &lvars);
2760 mdt_obd_ops = mdt_obd_ops; //make compiler happy
2761 // class_register_type(&mdt_obd_ops, NULL,
2762 // lvars.module_vars, LUSTRE_MDT_NAME, NULL);
2767 static __attribute__((unused)) void /*__exit*/ mds_exit(void)
2769 lquota_exit(mds_quota_interface_ref);
2770 if (mds_quota_interface_ref)
2771 PORTAL_SYMBOL_PUT(mds_quota_interface);
2773 class_unregister_type(LUSTRE_MDS_NAME);
2774 // class_unregister_type(LUSTRE_MDT_NAME);
2776 /*mds still need lov setup here*/
2777 static int mds_cmd_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
2779 struct mds_obd *mds = &obd->u.mds;
2780 struct lvfs_run_ctxt saved;
2782 struct vfsmount *mnt;
2783 struct lustre_sb_info *lsi;
2784 struct lustre_mount_info *lmi;
2785 struct dentry *dentry;
2789 CDEBUG(D_INFO, "obd %s setup \n", obd->obd_name);
2790 if (strncmp(obd->obd_name, MDD_OBD_NAME, strlen(MDD_OBD_NAME)))
2793 if (lcfg->lcfg_bufcount < 5) {
2794 CERROR("invalid arg for setup %s\n", MDD_OBD_NAME);
2797 dev = lustre_cfg_string(lcfg, 4);
2798 lmi = server_get_mount(dev);
2799 LASSERT(lmi != NULL);
2801 lsi = s2lsi(lmi->lmi_sb);
2803 /* FIXME: MDD LOV initialize objects.
2804 * we need only lmi here but not get mount
2805 * OSD did mount already, so put mount back
2807 atomic_dec(&lsi->lsi_mounts);
2810 obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
2811 mds_init_ctxt(obd, mnt);
2813 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2814 dentry = simple_mkdir(current->fs->pwd, "OBJECTS", 0777, 1);
2815 if (IS_ERR(dentry)) {
2816 rc = PTR_ERR(dentry);
2817 CERROR("cannot create OBJECTS directory: rc = %d\n", rc);
2818 GOTO(err_putfs, rc);
2820 mds->mds_objects_dir = dentry;
2822 dentry = lookup_one_len("__iopen__", current->fs->pwd,
2823 strlen("__iopen__"));
2824 if (IS_ERR(dentry)) {
2825 rc = PTR_ERR(dentry);
2826 CERROR("cannot lookup __iopen__ directory: rc = %d\n", rc);
2827 GOTO(err_objects, rc);
2830 mds->mds_fid_de = dentry;
2831 if (!dentry->d_inode || is_bad_inode(dentry->d_inode)) {
2833 CERROR("__iopen__ directory has no inode? rc = %d\n", rc);
2836 rc = mds_lov_init_objids(obd);
2838 CERROR("cannot init lov objid rc = %d\n", rc);
2842 rc = mds_lov_presetup(mds, lcfg);
2844 GOTO(err_objects, rc);
2846 /* Don't wait for mds_postrecov trying to clear orphans */
2847 obd->obd_async_recov = 1;
2848 rc = mds_postsetup(obd);
2849 /* Bug 11557 - allow async abort_recov start
2850 FIXME can remove most of this obd_async_recov plumbing
2851 obd->obd_async_recov = 0;
2855 GOTO(err_objects, rc);
2857 mds->mds_max_mdsize = sizeof(struct lov_mds_md);
2858 mds->mds_max_cookiesize = sizeof(struct llog_cookie);
2861 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2864 dput(mds->mds_fid_de);
2866 dput(mds->mds_objects_dir);
2868 fsfilt_put_ops(obd->obd_fsops);
2872 static int mds_cmd_cleanup(struct obd_device *obd)
2874 struct mds_obd *mds = &obd->u.mds;
2875 struct lvfs_run_ctxt saved;
2880 LCONSOLE_WARN("%s: shutting down for failover; client state "
2881 "will be preserved.\n", obd->obd_name);
2883 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2885 mds_lov_destroy_objids(obd);
2887 if (mds->mds_objects_dir != NULL) {
2888 l_dput(mds->mds_objects_dir);
2889 mds->mds_objects_dir = NULL;
2892 shrink_dcache_parent(mds->mds_fid_de);
2893 dput(mds->mds_fid_de);
2894 LL_DQUOT_OFF(obd->u.obt.obt_sb);
2895 fsfilt_put_ops(obd->obd_fsops);
2897 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2902 static int mds_cmd_health_check(struct obd_device *obd)
2907 static struct obd_ops mds_cmd_obd_ops = {
2908 .o_owner = THIS_MODULE,
2909 .o_setup = mds_cmd_setup,
2910 .o_cleanup = mds_cmd_cleanup,
2911 .o_precleanup = mds_precleanup,
2912 .o_create = mds_obd_create,
2913 .o_destroy = mds_obd_destroy,
2914 .o_llog_init = mds_llog_init,
2915 .o_llog_finish = mds_llog_finish,
2916 .o_notify = mds_notify,
2917 .o_postrecov = mds_postrecov,
2918 // .o_health_check = mds_cmd_health_check,
2921 static int __init mds_cmd_init(void)
2923 struct lprocfs_static_vars lvars;
2925 lprocfs_init_vars(mds, &lvars);
2926 class_register_type(&mds_cmd_obd_ops, NULL, lvars.module_vars,
2927 LUSTRE_MDS_NAME, NULL);
2932 static void /*__exit*/ mds_cmd_exit(void)
2934 class_unregister_type(LUSTRE_MDS_NAME);
2937 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2938 MODULE_DESCRIPTION("Lustre Metadata Server (MDS)");
2939 MODULE_LICENSE("GPL");
2941 module_init(mds_cmd_init);
2942 module_exit(mds_cmd_exit);