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 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETSTATUS_PACK))
523 RETURN(req->rq_status = -ENOMEM);
524 rc = lustre_pack_reply(req, 2, size, NULL);
526 RETURN(req->rq_status = rc);
528 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
529 memcpy(&body->fid1, &mds->mds_rootfid, sizeof(body->fid1));
531 /* the last_committed and last_xid fields are filled in for all
532 * replies already - no need to do so here also.
537 /* get the LOV EA from @inode and store it into @md. It can be at most
538 * @size bytes, and @size is updated with the actual EA size.
539 * The EA size is also returned on success, and -ve errno on failure.
540 * If there is no EA then 0 is returned. */
541 int mds_get_md(struct obd_device *obd, struct inode *inode, void *md,
548 LOCK_INODE_MUTEX(inode);
549 rc = fsfilt_get_md(obd, inode, md, *size, "lov");
552 CERROR("Error %d reading eadata for ino %lu\n",
556 rc = mds_convert_lov_ea(obd, inode, md, lmm_size);
568 UNLOCK_INODE_MUTEX(inode);
574 /* Call with lock=1 if you want mds_pack_md to take the i_mutex.
575 * Call with lock=0 if the caller has already taken the i_mutex. */
576 int mds_pack_md(struct obd_device *obd, struct lustre_msg *msg, int offset,
577 struct mds_body *body, struct inode *inode, int lock)
579 struct mds_obd *mds = &obd->u.mds;
585 lmm = lustre_msg_buf(msg, offset, 0);
587 /* Some problem with getting eadata when I sized the reply
589 CDEBUG(D_INFO, "no space reserved for inode %lu MD\n",
593 lmm_size = lustre_msg_buflen(msg, offset);
595 /* I don't really like this, but it is a sanity check on the client
596 * MD request. However, if the client doesn't know how much space
597 * to reserve for the MD, it shouldn't be bad to have too much space.
599 if (lmm_size > mds->mds_max_mdsize) {
600 CWARN("Reading MD for inode %lu of %d bytes > max %d\n",
601 inode->i_ino, lmm_size, mds->mds_max_mdsize);
605 rc = mds_get_md(obd, inode, lmm, &lmm_size, lock);
607 if (S_ISDIR(inode->i_mode))
608 body->valid |= OBD_MD_FLDIREA;
610 body->valid |= OBD_MD_FLEASIZE;
611 body->eadatasize = lmm_size;
618 #ifdef CONFIG_FS_POSIX_ACL
620 int mds_pack_posix_acl(struct inode *inode, struct lustre_msg *repmsg,
621 struct mds_body *repbody, int repoff)
623 struct dentry de = { .d_inode = inode };
627 LASSERT(repbody->aclsize == 0);
628 LASSERT(lustre_msg_bufcount(repmsg) > repoff);
630 buflen = lustre_msg_buflen(repmsg, repoff);
634 if (!inode->i_op || !inode->i_op->getxattr)
637 rc = inode->i_op->getxattr(&de, MDS_XATTR_NAME_ACL_ACCESS,
638 lustre_msg_buf(repmsg, repoff, buflen),
642 repbody->aclsize = rc;
643 else if (rc != -ENODATA) {
644 CERROR("buflen %d, get acl: %d\n", buflen, rc);
649 repbody->valid |= OBD_MD_FLACL;
653 #define mds_pack_posix_acl(inode, repmsg, repbody, repoff) 0
656 int mds_pack_acl(struct mds_export_data *med, struct inode *inode,
657 struct lustre_msg *repmsg, struct mds_body *repbody,
660 return mds_pack_posix_acl(inode, repmsg, repbody, repoff);
663 static int mds_getattr_internal(struct obd_device *obd, struct dentry *dentry,
664 struct ptlrpc_request *req,
665 struct mds_body *reqbody, int reply_off)
667 struct mds_body *body;
668 struct inode *inode = dentry->d_inode;
675 body = lustre_msg_buf(req->rq_repmsg, reply_off, sizeof(*body));
676 LASSERT(body != NULL); /* caller prepped reply */
678 mds_pack_inode2fid(&body->fid1, inode);
679 body->flags = reqbody->flags; /* copy MDS_BFLAG_EXT_FLAGS if present */
680 mds_pack_inode2body(body, inode);
683 if ((S_ISREG(inode->i_mode) && (reqbody->valid & OBD_MD_FLEASIZE)) ||
684 (S_ISDIR(inode->i_mode) && (reqbody->valid & OBD_MD_FLDIREA))) {
685 rc = mds_pack_md(obd, req->rq_repmsg, reply_off, body,
688 /* If we have LOV EA data, the OST holds size, atime, mtime */
689 if (!(body->valid & OBD_MD_FLEASIZE) &&
690 !(body->valid & OBD_MD_FLDIREA))
691 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
692 OBD_MD_FLATIME | OBD_MD_FLMTIME);
694 lustre_shrink_reply(req, reply_off, body->eadatasize, 0);
695 if (body->eadatasize)
697 } else if (S_ISLNK(inode->i_mode) &&
698 (reqbody->valid & OBD_MD_LINKNAME) != 0) {
699 char *symname = lustre_msg_buf(req->rq_repmsg, reply_off, 0);
702 LASSERT (symname != NULL); /* caller prepped reply */
703 len = lustre_msg_buflen(req->rq_repmsg, reply_off);
705 rc = inode->i_op->readlink(dentry, symname, len);
707 CERROR("readlink failed: %d\n", rc);
708 } else if (rc != len - 1) {
709 CERROR ("Unexpected readlink rc %d: expecting %d\n",
713 CDEBUG(D_INODE, "read symlink dest %s\n", symname);
714 body->valid |= OBD_MD_LINKNAME;
715 body->eadatasize = rc + 1;
716 symname[rc] = 0; /* NULL terminate */
720 } else if (reqbody->valid == OBD_MD_FLFLAGS &&
721 reqbody->flags & MDS_BFLAG_EXT_FLAGS) {
724 /* We only return the full set of flags on ioctl, otherwise we
725 * get enough flags from the inode in mds_pack_inode2body(). */
726 rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_GETFLAGS,
729 body->flags = flags | MDS_BFLAG_EXT_FLAGS;
732 if (reqbody->valid & OBD_MD_FLMODEASIZE) {
733 struct mds_obd *mds = mds_req2mds(req);
734 body->max_cookiesize = mds->mds_max_cookiesize;
735 body->max_mdsize = mds->mds_max_mdsize;
736 body->valid |= OBD_MD_FLMODEASIZE;
742 #ifdef CONFIG_FS_POSIX_ACL
743 if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
744 (reqbody->valid & OBD_MD_FLACL)) {
745 rc = mds_pack_acl(&req->rq_export->exp_mds_data,
746 inode, req->rq_repmsg,
749 lustre_shrink_reply(req, reply_off, body->aclsize, 0);
758 static int mds_getattr_pack_msg(struct ptlrpc_request *req, struct inode *inode,
761 struct mds_obd *mds = mds_req2mds(req);
762 struct mds_body *body;
763 int rc, bufcount = 2;
764 int size[4] = { sizeof(struct ptlrpc_body), sizeof(*body) };
767 LASSERT(offset == REQ_REC_OFF); /* non-intent */
769 body = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*body));
770 LASSERT(body != NULL); /* checked by caller */
771 LASSERT(lustre_req_swabbed(req, offset)); /* swabbed by caller */
773 if ((S_ISREG(inode->i_mode) && (body->valid & OBD_MD_FLEASIZE)) ||
774 (S_ISDIR(inode->i_mode) && (body->valid & OBD_MD_FLDIREA))) {
775 LOCK_INODE_MUTEX(inode);
776 rc = fsfilt_get_md(req->rq_export->exp_obd, inode, NULL, 0,
778 UNLOCK_INODE_MUTEX(inode);
779 CDEBUG(D_INODE, "got %d bytes MD data for inode %lu\n",
782 if (rc != -ENODATA) {
783 CERROR("error getting inode %lu MD: rc = %d\n",
788 } else if (rc > mds->mds_max_mdsize) {
790 CERROR("MD size %d larger than maximum possible %u\n",
791 rc, mds->mds_max_mdsize);
796 } else if (S_ISLNK(inode->i_mode) && (body->valid & OBD_MD_LINKNAME)) {
797 if (i_size_read(inode) + 1 != body->eadatasize)
798 CERROR("symlink size: %Lu, reply space: %d\n",
799 i_size_read(inode) + 1, body->eadatasize);
800 size[bufcount] = min_t(int, i_size_read(inode) + 1,
803 CDEBUG(D_INODE, "symlink size: %Lu, reply space: %d\n",
804 i_size_read(inode) + 1, body->eadatasize);
807 #ifdef CONFIG_FS_POSIX_ACL
808 if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
809 (body->valid & OBD_MD_FLACL)) {
810 struct dentry de = { .d_inode = inode };
813 if (inode->i_op && inode->i_op->getxattr) {
814 rc = inode->i_op->getxattr(&de, MDS_XATTR_NAME_ACL_ACCESS,
818 if (rc != -ENODATA) {
819 CERROR("got acl size: %d\n", rc);
829 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
830 CERROR("failed MDS_GETATTR_PACK test\n");
831 req->rq_status = -ENOMEM;
835 rc = lustre_pack_reply(req, bufcount, size, NULL);
844 static int mds_getattr_lock(struct ptlrpc_request *req, int offset,
845 int child_part, struct lustre_handle *child_lockh)
847 struct obd_device *obd = req->rq_export->exp_obd;
848 struct mds_obd *mds = &obd->u.mds;
849 struct ldlm_reply *rep = NULL;
850 struct lvfs_run_ctxt saved;
851 struct mds_body *body;
852 struct dentry *dparent = NULL, *dchild = NULL;
853 struct lvfs_ucred uc = {0,};
854 struct lustre_handle parent_lockh;
856 int rc = 0, cleanup_phase = 0, resent_req = 0;
860 LASSERT(!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME));
862 /* Swab now, before anyone looks inside the request */
863 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
864 lustre_swab_mds_body);
866 CERROR("Can't swab mds_body\n");
870 lustre_set_req_swabbed(req, offset + 1);
871 name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
873 CERROR("Can't unpack name\n");
876 namesize = lustre_msg_buflen(req->rq_reqmsg, offset + 1);
877 /* namesize less than 2 means we have empty name, probably came from
878 revalidate by cfid, so no point in having name to be set */
882 rc = mds_init_ucred(&uc, req, offset);
886 LASSERT(offset == REQ_REC_OFF || offset == DLM_INTENT_REC_OFF);
887 /* if requests were at offset 2, the getattr reply goes back at 1 */
888 if (offset == DLM_INTENT_REC_OFF) {
889 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF,
891 offset = DLM_REPLY_REC_OFF;
894 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
895 cleanup_phase = 1; /* kernel context */
896 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
898 /* FIXME: handle raw lookup */
900 if (body->valid == OBD_MD_FLID) {
901 struct mds_body *mds_reply;
902 int size = sizeof(*mds_reply);
904 // The user requested ONLY the inode number, so do a raw lookup
905 rc = lustre_pack_reply(req, 1, &size, NULL);
907 CERROR("out of memory\n");
911 rc = dir->i_op->lookup_raw(dir, name, namesize - 1, &inum);
913 mds_reply = lustre_msg_buf(req->rq_repmsg, offset,
915 mds_reply->fid1.id = inum;
916 mds_reply->valid = OBD_MD_FLID;
921 if (lustre_handle_is_used(child_lockh)) {
922 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT);
926 if (resent_req == 0) {
928 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RESEND, obd_timeout * 2);
929 rc = mds_get_parent_child_locked(obd, &obd->u.mds,
933 MDS_INODELOCK_UPDATE,
935 child_lockh, &dchild,
938 /* For revalidate by fid we always take UPDATE lock */
939 dchild = mds_fid2locked_dentry(obd, &body->fid2, NULL,
944 rc = PTR_ERR(dchild);
949 struct ldlm_lock *granted_lock;
950 struct ll_fid child_fid;
951 struct ldlm_resource *res;
952 DEBUG_REQ(D_DLMTRACE, req, "resent, not enqueuing new locks");
953 granted_lock = ldlm_handle2lock(child_lockh);
954 LASSERTF(granted_lock != NULL, LPU64"/%u lockh "LPX64"\n",
955 body->fid1.id, body->fid1.generation,
956 child_lockh->cookie);
959 res = granted_lock->l_resource;
960 child_fid.id = res->lr_name.name[0];
961 child_fid.generation = res->lr_name.name[1];
962 dchild = mds_fid2dentry(&obd->u.mds, &child_fid, NULL);
963 LASSERT(!IS_ERR(dchild));
964 LDLM_LOCK_PUT(granted_lock);
967 cleanup_phase = 2; /* dchild, dparent, locks */
969 if (dchild->d_inode == NULL) {
970 intent_set_disposition(rep, DISP_LOOKUP_NEG);
971 /* in the intent case, the policy clears this error:
972 the disposition is enough */
973 GOTO(cleanup, rc = -ENOENT);
975 intent_set_disposition(rep, DISP_LOOKUP_POS);
978 if (req->rq_repmsg == NULL) {
979 rc = mds_getattr_pack_msg(req, dchild->d_inode, offset);
981 CERROR ("mds_getattr_pack_msg: %d\n", rc);
986 rc = mds_getattr_internal(obd, dchild, req, body, offset);
987 GOTO(cleanup, rc); /* returns the lock to the client */
990 switch (cleanup_phase) {
992 if (resent_req == 0) {
993 if (rc && dchild->d_inode)
994 ldlm_lock_decref(child_lockh, LCK_CR);
996 ldlm_lock_decref(&parent_lockh, LCK_CR);
1002 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1004 mds_exit_ucred(&uc, mds);
1005 if (req->rq_reply_state == NULL) {
1006 int rc2 = lustre_pack_reply(req, 1, NULL, NULL);
1009 req->rq_status = rc;
1015 static int mds_getattr(struct ptlrpc_request *req, int offset)
1017 struct mds_obd *mds = mds_req2mds(req);
1018 struct obd_device *obd = req->rq_export->exp_obd;
1019 struct lvfs_run_ctxt saved;
1021 struct mds_body *body;
1022 struct lvfs_ucred uc = {0,};
1026 OBD_COUNTER_INCREMENT(obd, getattr);
1028 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1029 lustre_swab_mds_body);
1033 rc = mds_init_ucred(&uc, req, offset);
1035 GOTO(out_ucred, rc);
1037 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1038 de = mds_fid2dentry(mds, &body->fid1, NULL);
1040 rc = req->rq_status = PTR_ERR(de);
1044 rc = mds_getattr_pack_msg(req, de->d_inode, offset);
1046 CERROR("mds_getattr_pack_msg: %d\n", rc);
1050 req->rq_status = mds_getattr_internal(obd, de, req, body,
1056 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1058 if (req->rq_reply_state == NULL) {
1059 int rc2 = lustre_pack_reply(req, 1, NULL, NULL);
1062 req->rq_status = rc;
1064 mds_exit_ucred(&uc, mds);
1068 static int mds_obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1073 spin_lock(&obd->obd_osfs_lock);
1074 rc = fsfilt_statfs(obd, obd->u.obt.obt_sb, max_age);
1076 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1077 spin_unlock(&obd->obd_osfs_lock);
1082 static int mds_statfs(struct ptlrpc_request *req)
1084 struct obd_device *obd = req->rq_export->exp_obd;
1085 int rc, size[2] = { sizeof(struct ptlrpc_body),
1086 sizeof(struct obd_statfs) };
1089 /* This will trigger a watchdog timeout */
1090 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_STATFS_LCW_SLEEP,
1091 (MDS_SERVICE_WATCHDOG_TIMEOUT / 1000) + 1);
1092 OBD_COUNTER_INCREMENT(obd, statfs);
1094 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK))
1095 GOTO(out, rc = -ENOMEM);
1096 rc = lustre_pack_reply(req, 2, size, NULL);
1100 /* We call this so that we can cache a bit - 1 jiffie worth */
1101 rc = mds_obd_statfs(obd, lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1102 size[REPLY_REC_OFF]),
1103 cfs_time_current_64() - HZ);
1105 CERROR("mds_obd_statfs failed: rc %d\n", rc);
1111 req->rq_status = rc;
1115 static int mds_sync(struct ptlrpc_request *req, int offset)
1117 struct obd_device *obd = req->rq_export->exp_obd;
1118 struct mds_obd *mds = &obd->u.mds;
1119 struct mds_body *body;
1120 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
1123 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1124 lustre_swab_mds_body);
1126 GOTO(out, rc = -EFAULT);
1128 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK))
1129 GOTO(out, rc = -ENOMEM);
1130 rc = lustre_pack_reply(req, 2, size, NULL);
1134 if (body->fid1.id == 0) {
1135 /* a fid of zero is taken to mean "sync whole filesystem" */
1136 rc = fsfilt_sync(obd, obd->u.obt.obt_sb);
1141 de = mds_fid2dentry(mds, &body->fid1, NULL);
1143 GOTO(out, rc = PTR_ERR(de));
1145 /* The file parameter isn't used for anything */
1146 if (de->d_inode->i_fop && de->d_inode->i_fop->fsync)
1147 rc = de->d_inode->i_fop->fsync(NULL, de, 1);
1149 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1151 mds_pack_inode2fid(&body->fid1, de->d_inode);
1152 mds_pack_inode2body(body, de->d_inode);
1159 req->rq_status = rc;
1163 /* mds_readpage does not take a DLM lock on the inode, because the client must
1164 * already have a PR lock.
1166 * If we were to take another one here, a deadlock will result, if another
1167 * thread is already waiting for a PW lock. */
1168 static int mds_readpage(struct ptlrpc_request *req, int offset)
1170 struct obd_device *obd = req->rq_export->exp_obd;
1171 struct mds_obd *mds = &obd->u.mds;
1172 struct vfsmount *mnt;
1175 struct mds_body *body, *repbody;
1176 struct lvfs_run_ctxt saved;
1177 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*repbody) };
1178 struct lvfs_ucred uc = {0,};
1181 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK))
1183 rc = lustre_pack_reply(req, 2, size, NULL);
1187 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1188 lustre_swab_mds_body);
1190 GOTO (out, rc = -EFAULT);
1192 rc = mds_init_ucred(&uc, req, offset);
1196 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1197 de = mds_fid2dentry(&obd->u.mds, &body->fid1, &mnt);
1199 GOTO(out_pop, rc = PTR_ERR(de));
1201 CDEBUG(D_INODE, "ino %lu\n", de->d_inode->i_ino);
1203 file = dentry_open(de, mnt, O_RDONLY | O_LARGEFILE);
1204 /* note: in case of an error, dentry_open puts dentry */
1206 GOTO(out_pop, rc = PTR_ERR(file));
1208 /* body->size is actually the offset -eeb */
1209 if ((body->size & (de->d_inode->i_sb->s_blocksize - 1)) != 0) {
1210 CERROR("offset "LPU64" not on a block boundary of %lu\n",
1211 body->size, de->d_inode->i_sb->s_blocksize);
1212 GOTO(out_file, rc = -EFAULT);
1215 /* body->nlink is actually the #bytes to read -eeb */
1216 if (body->nlink & (de->d_inode->i_sb->s_blocksize - 1)) {
1217 CERROR("size %u is not multiple of blocksize %lu\n",
1218 body->nlink, de->d_inode->i_sb->s_blocksize);
1219 GOTO(out_file, rc = -EFAULT);
1222 repbody = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1224 repbody->size = i_size_read(file->f_dentry->d_inode);
1225 repbody->valid = OBD_MD_FLSIZE;
1227 /* to make this asynchronous make sure that the handling function
1228 doesn't send a reply when this function completes. Instead a
1229 callback function would send the reply */
1230 /* body->size is actually the offset -eeb */
1231 rc = mds_sendpage(req, file, body->size, body->nlink);
1234 filp_close(file, 0);
1236 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1238 mds_exit_ucred(&uc, mds);
1239 req->rq_status = rc;
1243 int mds_reint(struct ptlrpc_request *req, int offset,
1244 struct lustre_handle *lockh)
1246 struct mds_update_record *rec; /* 116 bytes on the stack? no sir! */
1249 OBD_ALLOC(rec, sizeof(*rec));
1253 rc = mds_update_unpack(req, offset, rec);
1254 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNPACK)) {
1255 CERROR("invalid record\n");
1256 GOTO(out, req->rq_status = -EINVAL);
1259 /* rc will be used to interrupt a for loop over multiple records */
1260 rc = mds_reint_rec(rec, offset, req, lockh);
1262 OBD_FREE(rec, sizeof(*rec));
1266 int mds_filter_recovery_request(struct ptlrpc_request *req,
1267 struct obd_device *obd, int *process)
1269 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1270 case MDS_CONNECT: /* This will never get here, but for completeness. */
1271 case OST_CONNECT: /* This will never get here, but for completeness. */
1272 case MDS_DISCONNECT:
1273 case OST_DISCONNECT:
1278 case MDS_DONE_WRITING:
1279 case MDS_SYNC: /* used in unmounting */
1285 *process = target_queue_recovery_request(req, obd);
1289 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
1294 EXPORT_SYMBOL(mds_filter_recovery_request);
1296 static char *reint_names[] = {
1297 [REINT_SETATTR] "setattr",
1298 [REINT_CREATE] "create",
1299 [REINT_LINK] "link",
1300 [REINT_UNLINK] "unlink",
1301 [REINT_RENAME] "rename",
1302 [REINT_OPEN] "open",
1305 static int mds_set_info_rpc(struct obd_export *exp, struct ptlrpc_request *req)
1308 int keylen, vallen, rc = 0;
1311 key = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, 1);
1313 DEBUG_REQ(D_HA, req, "no set_info key");
1316 keylen = lustre_msg_buflen(req->rq_reqmsg, REQ_REC_OFF);
1318 val = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 1, 0);
1319 vallen = lustre_msg_buflen(req->rq_reqmsg, REQ_REC_OFF + 1);
1321 rc = lustre_pack_reply(req, 1, NULL, NULL);
1325 lustre_msg_set_status(req->rq_repmsg, 0);
1327 if (KEY_IS("read-only")) {
1328 if (val == NULL || vallen < sizeof(__u32)) {
1329 DEBUG_REQ(D_HA, req, "no set_info val");
1334 exp->exp_connect_flags |= OBD_CONNECT_RDONLY;
1336 exp->exp_connect_flags &= ~OBD_CONNECT_RDONLY;
1344 static int mds_handle_quotacheck(struct ptlrpc_request *req)
1346 struct obd_quotactl *oqctl;
1350 oqctl = lustre_swab_reqbuf(req, REQ_REC_OFF, sizeof(*oqctl),
1351 lustre_swab_obd_quotactl);
1355 rc = lustre_pack_reply(req, 1, NULL, NULL);
1359 req->rq_status = obd_quotacheck(req->rq_export, oqctl);
1363 static int mds_handle_quotactl(struct ptlrpc_request *req)
1365 struct obd_quotactl *oqctl, *repoqc;
1366 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*repoqc) };
1369 oqctl = lustre_swab_reqbuf(req, REQ_REC_OFF, sizeof(*oqctl),
1370 lustre_swab_obd_quotactl);
1374 rc = lustre_pack_reply(req, 2, size, NULL);
1378 repoqc = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*repoqc));
1380 req->rq_status = obd_quotactl(req->rq_export, oqctl);
1385 int mds_msg_check_version(struct lustre_msg *msg)
1389 switch (lustre_msg_get_opc(msg)) {
1391 case MDS_DISCONNECT:
1394 case SEC_CTX_INIT_CONT:
1396 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
1398 CERROR("bad opc %u version %08x, expecting %08x\n",
1399 lustre_msg_get_opc(msg),
1400 lustre_msg_get_version(msg),
1401 LUSTRE_OBD_VERSION);
1405 case MDS_GETATTR_NAME:
1412 case MDS_DONE_WRITING:
1418 case MDS_QUOTACHECK:
1424 rc = lustre_msg_check_version(msg, LUSTRE_MDS_VERSION);
1426 CERROR("bad opc %u version %08x, expecting %08x\n",
1427 lustre_msg_get_opc(msg),
1428 lustre_msg_get_version(msg),
1429 LUSTRE_MDS_VERSION);
1433 case LDLM_BL_CALLBACK:
1434 case LDLM_CP_CALLBACK:
1435 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1437 CERROR("bad opc %u version %08x, expecting %08x\n",
1438 lustre_msg_get_opc(msg),
1439 lustre_msg_get_version(msg),
1440 LUSTRE_DLM_VERSION);
1442 case OBD_LOG_CANCEL:
1443 case LLOG_ORIGIN_HANDLE_CREATE:
1444 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1445 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1446 case LLOG_ORIGIN_HANDLE_CLOSE:
1447 case LLOG_ORIGIN_HANDLE_DESTROY:
1448 case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1450 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1452 CERROR("bad opc %u version %08x, expecting %08x\n",
1453 lustre_msg_get_opc(msg),
1454 lustre_msg_get_version(msg),
1455 LUSTRE_LOG_VERSION);
1458 CERROR("MDS unknown opcode %d\n", lustre_msg_get_opc(msg));
1463 EXPORT_SYMBOL(mds_msg_check_version);
1465 int mds_handle(struct ptlrpc_request *req)
1467 int should_process, fail = OBD_FAIL_MDS_ALL_REPLY_NET;
1469 struct mds_obd *mds = NULL; /* quell gcc overwarning */
1470 struct obd_device *obd = NULL;
1473 if (OBD_FAIL_CHECK_ORSET(OBD_FAIL_MDS_ALL_REQUEST_NET, OBD_FAIL_ONCE))
1476 LASSERT(current->journal_info == NULL);
1478 rc = mds_msg_check_version(req->rq_reqmsg);
1480 CERROR("MDS drop mal-formed request\n");
1484 /* XXX identical to OST */
1485 if (lustre_msg_get_opc(req->rq_reqmsg) != MDS_CONNECT) {
1486 struct mds_export_data *med;
1489 if (req->rq_export == NULL) {
1490 CERROR("operation %d on unconnected MDS from %s\n",
1491 lustre_msg_get_opc(req->rq_reqmsg),
1492 libcfs_id2str(req->rq_peer));
1493 req->rq_status = -ENOTCONN;
1494 GOTO(out, rc = -ENOTCONN);
1497 med = &req->rq_export->exp_mds_data;
1498 obd = req->rq_export->exp_obd;
1499 mds = mds_req2mds(req);
1501 /* sanity check: if the xid matches, the request must
1502 * be marked as a resent or replayed */
1503 if (req->rq_xid == le64_to_cpu(med->med_mcd->mcd_last_xid) ||
1504 req->rq_xid == le64_to_cpu(med->med_mcd->mcd_last_close_xid))
1505 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
1506 (MSG_RESENT | MSG_REPLAY))) {
1507 CERROR("rq_xid "LPU64" matches last_xid, "
1508 "expected RESENT flag\n",
1510 req->rq_status = -ENOTCONN;
1511 GOTO(out, rc = -EFAULT);
1513 /* else: note the opposite is not always true; a
1514 * RESENT req after a failover will usually not match
1515 * the last_xid, since it was likely never
1516 * committed. A REPLAYed request will almost never
1517 * match the last xid, however it could for a
1518 * committed, but still retained, open. */
1520 /* Check for aborted recovery. */
1521 spin_lock_bh(&obd->obd_processing_task_lock);
1522 recovering = obd->obd_recovering;
1523 spin_unlock_bh(&obd->obd_processing_task_lock);
1525 rc = mds_filter_recovery_request(req, obd,
1527 if (rc || !should_process)
1529 else if (should_process < 0) {
1530 req->rq_status = should_process;
1531 rc = ptlrpc_error(req);
1537 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1539 DEBUG_REQ(D_INODE, req, "connect");
1540 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CONNECT_NET))
1542 rc = target_handle_connect(req);
1544 /* Now that we have an export, set mds. */
1546 * XXX nikita: these assignments are useless: mds is
1547 * never used below, and obd is only used for
1548 * MSG_LAST_REPLAY case, which never happens for
1551 obd = req->rq_export->exp_obd;
1552 mds = mds_req2mds(req);
1556 case MDS_DISCONNECT:
1557 DEBUG_REQ(D_INODE, req, "disconnect");
1558 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DISCONNECT_NET))
1560 rc = target_handle_disconnect(req);
1561 req->rq_status = rc; /* superfluous? */
1565 DEBUG_REQ(D_INODE, req, "getstatus");
1566 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETSTATUS_NET))
1568 rc = mds_getstatus(req);
1572 DEBUG_REQ(D_INODE, req, "getattr");
1573 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_NET))
1575 rc = mds_getattr(req, REQ_REC_OFF);
1579 DEBUG_REQ(D_INODE, req, "setxattr");
1580 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SETXATTR_NET))
1582 rc = mds_setxattr(req);
1586 DEBUG_REQ(D_INODE, req, "getxattr");
1587 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETXATTR_NET))
1589 rc = mds_getxattr(req);
1592 case MDS_GETATTR_NAME: {
1593 struct lustre_handle lockh = { 0 };
1594 DEBUG_REQ(D_INODE, req, "getattr_name");
1595 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_NAME_NET))
1598 /* If this request gets a reconstructed reply, we won't be
1599 * acquiring any new locks in mds_getattr_lock, so we don't
1602 rc = mds_getattr_lock(req, REQ_REC_OFF, MDS_INODELOCK_UPDATE,
1604 /* this non-intent call (from an ioctl) is special */
1605 req->rq_status = rc;
1606 if (rc == 0 && lustre_handle_is_used(&lockh))
1607 ldlm_lock_decref(&lockh, LCK_CR);
1611 DEBUG_REQ(D_INODE, req, "statfs");
1612 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_NET))
1614 rc = mds_statfs(req);
1618 DEBUG_REQ(D_INODE, req, "readpage");
1619 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_NET))
1621 rc = mds_readpage(req, REQ_REC_OFF);
1623 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
1630 __u32 *opcp = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF,
1633 int size[4] = { sizeof(struct ptlrpc_body),
1634 sizeof(struct mds_body),
1635 mds->mds_max_mdsize,
1636 mds->mds_max_cookiesize };
1639 /* NB only peek inside req now; mds_reint() will swab it */
1641 CERROR ("Can't inspect opcode\n");
1646 if (lustre_msg_swabbed(req->rq_reqmsg))
1649 DEBUG_REQ(D_INODE, req, "reint %d (%s)", opc,
1650 (opc < sizeof(reint_names) / sizeof(reint_names[0]) ||
1651 reint_names[opc] == NULL) ? reint_names[opc] :
1654 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_NET))
1657 if (opc == REINT_UNLINK || opc == REINT_RENAME)
1659 else if (opc == REINT_OPEN)
1664 rc = lustre_pack_reply(req, bufcount, size, NULL);
1668 rc = mds_reint(req, REQ_REC_OFF, NULL);
1669 fail = OBD_FAIL_MDS_REINT_NET_REP;
1674 DEBUG_REQ(D_INODE, req, "close");
1675 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_NET))
1677 rc = mds_close(req, REQ_REC_OFF);
1680 case MDS_DONE_WRITING:
1681 DEBUG_REQ(D_INODE, req, "done_writing");
1682 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DONE_WRITING_NET))
1684 rc = mds_done_writing(req, REQ_REC_OFF);
1688 DEBUG_REQ(D_INODE, req, "pin");
1689 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_PIN_NET))
1691 rc = mds_pin(req, REQ_REC_OFF);
1695 DEBUG_REQ(D_INODE, req, "sync");
1696 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_NET))
1698 rc = mds_sync(req, REQ_REC_OFF);
1702 DEBUG_REQ(D_INODE, req, "set_info");
1703 rc = mds_set_info_rpc(req->rq_export, req);
1706 case MDS_QUOTACHECK:
1707 DEBUG_REQ(D_INODE, req, "quotacheck");
1708 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_QUOTACHECK_NET))
1710 rc = mds_handle_quotacheck(req);
1714 DEBUG_REQ(D_INODE, req, "quotactl");
1715 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_QUOTACTL_NET))
1717 rc = mds_handle_quotactl(req);
1721 DEBUG_REQ(D_INODE, req, "ping");
1722 rc = target_handle_ping(req);
1725 case OBD_LOG_CANCEL:
1726 CDEBUG(D_INODE, "log cancel\n");
1727 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1729 rc = -ENOTSUPP; /* la la la */
1733 DEBUG_REQ(D_INODE, req, "enqueue");
1734 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE))
1736 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1737 ldlm_server_blocking_ast, NULL);
1738 fail = OBD_FAIL_LDLM_REPLY;
1741 DEBUG_REQ(D_INODE, req, "convert");
1742 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CONVERT))
1744 rc = ldlm_handle_convert(req);
1746 case LDLM_BL_CALLBACK:
1747 case LDLM_CP_CALLBACK:
1748 DEBUG_REQ(D_INODE, req, "callback");
1749 CERROR("callbacks should not happen on MDS\n");
1751 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK))
1754 case LLOG_ORIGIN_HANDLE_CREATE:
1755 DEBUG_REQ(D_INODE, req, "llog_init");
1756 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1758 rc = llog_origin_handle_create(req);
1760 case LLOG_ORIGIN_HANDLE_DESTROY:
1761 DEBUG_REQ(D_INODE, req, "llog_init");
1762 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1764 rc = llog_origin_handle_destroy(req);
1766 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1767 DEBUG_REQ(D_INODE, req, "llog next block");
1768 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1770 rc = llog_origin_handle_next_block(req);
1772 case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1773 DEBUG_REQ(D_INODE, req, "llog prev block");
1774 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1776 rc = llog_origin_handle_prev_block(req);
1778 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1779 DEBUG_REQ(D_INODE, req, "llog read header");
1780 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1782 rc = llog_origin_handle_read_header(req);
1784 case LLOG_ORIGIN_HANDLE_CLOSE:
1785 DEBUG_REQ(D_INODE, req, "llog close");
1786 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1788 rc = llog_origin_handle_close(req);
1791 DEBUG_REQ(D_INODE, req, "llog catinfo");
1792 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1794 rc = llog_catinfo(req);
1797 req->rq_status = -ENOTSUPP;
1798 rc = ptlrpc_error(req);
1802 LASSERT(current->journal_info == NULL);
1804 /* If we're DISCONNECTing, the mds_export_data is already freed */
1805 if (!rc && lustre_msg_get_opc(req->rq_reqmsg) != MDS_DISCONNECT) {
1806 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1808 /* I don't think last_xid is used for anyway, so I'm not sure
1809 if we need to care about last_close_xid here.*/
1810 lustre_msg_set_last_xid(req->rq_repmsg,
1811 le64_to_cpu(med->med_mcd->mcd_last_xid));
1813 target_committed_to_req(req);
1819 target_send_reply(req, rc, fail);
1823 /* Update the server data on disk. This stores the new mount_count and
1824 * also the last_rcvd value to disk. If we don't have a clean shutdown,
1825 * then the server last_rcvd value may be less than that of the clients.
1826 * This will alert us that we may need to do client recovery.
1828 * Also assumes for mds_last_transno that we are not modifying it (no locking).
1830 int mds_update_server_data(struct obd_device *obd, int force_sync)
1832 struct mds_obd *mds = &obd->u.mds;
1833 struct lr_server_data *lsd = mds->mds_server_data;
1834 struct file *filp = mds->mds_rcvd_filp;
1835 struct lvfs_run_ctxt saved;
1840 CDEBUG(D_SUPER, "MDS mount_count is "LPU64", last_transno is "LPU64"\n",
1841 mds->mds_mount_count, mds->mds_last_transno);
1843 spin_lock(&mds->mds_transno_lock);
1844 lsd->lsd_last_transno = cpu_to_le64(mds->mds_last_transno);
1845 spin_unlock(&mds->mds_transno_lock);
1847 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1848 rc = fsfilt_write_record(obd, filp, lsd, sizeof(*lsd), &off,force_sync);
1849 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1851 CERROR("error writing MDS server data: rc = %d\n", rc);
1855 static void fsoptions_to_mds_flags(struct mds_obd *mds, char *options)
1865 while (*p && *p != ',')
1869 if (len == sizeof("user_xattr") - 1 &&
1870 memcmp(options, "user_xattr", len) == 0) {
1871 mds->mds_fl_user_xattr = 1;
1872 LCONSOLE_INFO("Enabling user_xattr\n");
1873 } else if (len == sizeof("nouser_xattr") - 1 &&
1874 memcmp(options, "nouser_xattr", len) == 0) {
1875 mds->mds_fl_user_xattr = 0;
1876 LCONSOLE_INFO("Disabling user_xattr\n");
1877 } else if (len == sizeof("acl") - 1 &&
1878 memcmp(options, "acl", len) == 0) {
1879 #ifdef CONFIG_FS_POSIX_ACL
1880 mds->mds_fl_acl = 1;
1881 LCONSOLE_INFO("Enabling ACL\n");
1883 CWARN("ignoring unsupported acl mount option\n");
1885 } else if (len == sizeof("noacl") - 1 &&
1886 memcmp(options, "noacl", len) == 0) {
1887 #ifdef CONFIG_FS_POSIX_ACL
1888 mds->mds_fl_acl = 0;
1889 LCONSOLE_INFO("Disabling ACL\n");
1896 static int mds_lov_presetup (struct mds_obd *mds, struct lustre_cfg *lcfg)
1901 rc = llog_start_commit_thread();
1905 if (lcfg->lcfg_bufcount >= 4 && LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
1908 ll_generate_random_uuid(uuid);
1909 class_uuid_unparse(uuid, &mds->mds_lov_uuid);
1911 OBD_ALLOC(mds->mds_profile, LUSTRE_CFG_BUFLEN(lcfg, 3));
1912 if (mds->mds_profile == NULL)
1915 strncpy(mds->mds_profile, lustre_cfg_string(lcfg, 3),
1916 LUSTRE_CFG_BUFLEN(lcfg, 3));
1921 /* mount the file system (secretly). lustre_cfg parameters are:
1927 static int mds_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
1929 struct lprocfs_static_vars lvars;
1930 struct mds_obd *mds = &obd->u.mds;
1931 struct lustre_mount_info *lmi;
1932 struct vfsmount *mnt;
1933 struct lustre_sb_info *lsi;
1934 struct obd_uuid uuid;
1941 /* setup 1:/dev/loop/0 2:ext3 3:mdsA 4:errors=remount-ro,iopen_nopriv */
1943 CLASSERT(offsetof(struct obd_device, u.obt) ==
1944 offsetof(struct obd_device, u.mds.mds_obt));
1946 if (lcfg->lcfg_bufcount < 3)
1949 if (LUSTRE_CFG_BUFLEN(lcfg, 1) == 0 || LUSTRE_CFG_BUFLEN(lcfg, 2) == 0)
1952 lmi = server_get_mount(obd->obd_name);
1954 CERROR("Not mounted in lustre_fill_super?\n");
1958 /* We mounted in lustre_fill_super.
1959 lcfg bufs 1, 2, 4 (device, fstype, mount opts) are ignored.*/
1961 lsi = s2lsi(lmi->lmi_sb);
1962 fsoptions_to_mds_flags(mds, lsi->lsi_ldd->ldd_mount_opts);
1963 fsoptions_to_mds_flags(mds, lsi->lsi_lmd->lmd_opts);
1965 obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
1966 if (IS_ERR(obd->obd_fsops))
1967 GOTO(err_put, rc = PTR_ERR(obd->obd_fsops));
1969 CDEBUG(D_SUPER, "%s: mnt = %p\n", lustre_cfg_string(lcfg, 1), mnt);
1971 LASSERT(!lvfs_check_rdonly(lvfs_sbdev(mnt->mnt_sb)));
1973 sema_init(&mds->mds_epoch_sem, 1);
1974 spin_lock_init(&mds->mds_transno_lock);
1975 mds->mds_max_mdsize = sizeof(struct lov_mds_md);
1976 mds->mds_max_cookiesize = sizeof(struct llog_cookie);
1977 mds->mds_atime_diff = MAX_ATIME_DIFF;
1978 mds->mds_evict_ost_nids = 1;
1980 sprintf(ns_name, "mds-%s", obd->obd_uuid.uuid);
1981 obd->obd_namespace = ldlm_namespace_new(ns_name, LDLM_NAMESPACE_SERVER,
1982 LDLM_NAMESPACE_GREEDY);
1983 if (obd->obd_namespace == NULL) {
1985 GOTO(err_ops, rc = -ENOMEM);
1987 ldlm_register_intent(obd->obd_namespace, mds_intent_policy);
1989 lprocfs_mds_init_vars(&lvars);
1990 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0 &&
1991 lprocfs_alloc_obd_stats(obd, LPROC_MDS_LAST) == 0) {
1992 /* Init private stats here */
1993 mds_stats_counter_init(obd->obd_stats);
1994 obd->obd_proc_exports = proc_mkdir("exports",
1995 obd->obd_proc_entry);
1998 rc = mds_fs_setup(obd, mnt);
2000 CERROR("%s: MDS filesystem method init failed: rc = %d\n",
2005 rc = mds_lov_presetup(mds, lcfg);
2009 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
2010 "mds_ldlm_client", &obd->obd_ldlm_client);
2011 obd->obd_replayable = 1;
2013 rc = lquota_setup(mds_quota_interface_ref, obd);
2018 mds->mds_group_hash = upcall_cache_init(obd->obd_name);
2019 if (IS_ERR(mds->mds_group_hash)) {
2020 rc = PTR_ERR(mds->mds_group_hash);
2021 mds->mds_group_hash = NULL;
2022 GOTO(err_qctxt, rc);
2026 /* Don't wait for mds_postrecov trying to clear orphans */
2027 obd->obd_async_recov = 1;
2028 rc = mds_postsetup(obd);
2029 /* Bug 11557 - allow async abort_recov start
2030 FIXME can remove most of this obd_async_recov plumbing
2031 obd->obd_async_recov = 0;
2034 GOTO(err_qctxt, rc);
2036 uuid_ptr = fsfilt_uuid(obd, obd->u.obt.obt_sb);
2037 if (uuid_ptr != NULL) {
2038 class_uuid_unparse(uuid_ptr, &uuid);
2044 label = fsfilt_get_label(obd, obd->u.obt.obt_sb);
2045 if (obd->obd_recovering) {
2046 LCONSOLE_WARN("MDT %s now serving %s (%s%s%s), but will be in "
2047 "recovery until %d %s reconnect, or if no clients"
2048 " reconnect for %d:%.02d; during that time new "
2049 "clients will not be allowed to connect. "
2050 "Recovery progress can be monitored by watching "
2051 "/proc/fs/lustre/mds/%s/recovery_status.\n",
2052 obd->obd_name, lustre_cfg_string(lcfg, 1),
2053 label ?: "", label ? "/" : "", str,
2054 obd->obd_max_recoverable_clients,
2055 (obd->obd_max_recoverable_clients == 1) ?
2056 "client" : "clients",
2057 (int)(OBD_RECOVERY_TIMEOUT) / 60,
2058 (int)(OBD_RECOVERY_TIMEOUT) % 60,
2061 LCONSOLE_INFO("MDT %s now serving %s (%s%s%s) with recovery "
2062 "%s\n", obd->obd_name, lustre_cfg_string(lcfg, 1),
2063 label ?: "", label ? "/" : "", str,
2064 obd->obd_replayable ? "enabled" : "disabled");
2067 if (ldlm_timeout == LDLM_TIMEOUT_DEFAULT)
2073 lquota_cleanup(mds_quota_interface_ref, obd);
2075 /* No extra cleanup needed for llog_init_commit_thread() */
2076 mds_fs_cleanup(obd);
2078 upcall_cache_cleanup(mds->mds_group_hash);
2079 mds->mds_group_hash = NULL;
2082 lprocfs_obd_cleanup(obd);
2083 lprocfs_free_obd_stats(obd);
2084 ldlm_namespace_free(obd->obd_namespace, 0);
2085 obd->obd_namespace = NULL;
2087 fsfilt_put_ops(obd->obd_fsops);
2089 server_put_mount(obd->obd_name, mnt);
2090 obd->u.obt.obt_sb = NULL;
2094 static int mds_lov_clean(struct obd_device *obd)
2096 struct mds_obd *mds = &obd->u.mds;
2097 struct obd_device *osc = mds->mds_osc_obd;
2100 if (mds->mds_profile) {
2101 class_del_profile(mds->mds_profile);
2102 OBD_FREE(mds->mds_profile, strlen(mds->mds_profile) + 1);
2103 mds->mds_profile = NULL;
2106 /* There better be a lov */
2110 RETURN(PTR_ERR(osc));
2112 obd_register_observer(osc, NULL);
2114 /* Give lov our same shutdown flags */
2115 osc->obd_force = obd->obd_force;
2116 osc->obd_fail = obd->obd_fail;
2118 /* Cleanup the lov */
2119 obd_disconnect(mds->mds_osc_exp);
2120 class_manual_cleanup(osc);
2121 mds->mds_osc_exp = NULL;
2126 static int mds_postsetup(struct obd_device *obd)
2128 struct mds_obd *mds = &obd->u.mds;
2132 rc = llog_setup(obd, NULL, LLOG_CONFIG_ORIG_CTXT, obd, 0, NULL,
2137 rc = llog_setup(obd, NULL, LLOG_LOVEA_ORIG_CTXT, obd, 0, NULL,
2142 if (mds->mds_profile) {
2143 struct lustre_profile *lprof;
2144 /* The profile defines which osc and mdc to connect to, for a
2145 client. We reuse that here to figure out the name of the
2146 lov to use (and ignore lprof->lp_md).
2147 The profile was set in the config log with
2148 LCFG_MOUNTOPT profilenm oscnm mdcnm */
2149 lprof = class_get_profile(mds->mds_profile);
2150 if (lprof == NULL) {
2151 CERROR("No profile found: %s\n", mds->mds_profile);
2152 GOTO(err_cleanup, rc = -ENOENT);
2154 rc = mds_lov_connect(obd, lprof->lp_dt);
2156 GOTO(err_cleanup, rc);
2163 llog_cleanup(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT));
2164 llog_cleanup(llog_get_context(obd, LLOG_LOVEA_ORIG_CTXT));
2168 int mds_postrecov(struct obd_device *obd)
2176 LASSERT(!obd->obd_recovering);
2177 LASSERT(llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT) != NULL);
2178 /* clean PENDING dir */
2179 if (strncmp(obd->obd_name, MDD_OBD_NAME, strlen(MDD_OBD_NAME)))
2180 rc = mds_cleanup_pending(obd);
2184 /* FIXME Does target_finish_recovery really need this to block? */
2185 /* Notify the LOV, which will in turn call mds_notify for each tgt */
2186 /* This means that we have to hack obd_notify to think we're obd_set_up
2187 during mds_lov_connect. */
2188 obd_notify(obd->u.mds.mds_osc_obd, NULL,
2189 obd->obd_async_recov ? OBD_NOTIFY_SYNC_NONBLOCK :
2190 OBD_NOTIFY_SYNC, NULL);
2192 /* quota recovery */
2193 lquota_recovery(mds_quota_interface_ref, obd);
2199 /* We need to be able to stop an mds_lov_synchronize */
2200 static int mds_lov_early_clean(struct obd_device *obd)
2202 struct mds_obd *mds = &obd->u.mds;
2203 struct obd_device *osc = mds->mds_osc_obd;
2205 if (!osc || (!obd->obd_force && !obd->obd_fail))
2208 CDEBUG(D_HA, "abort inflight\n");
2209 return (obd_precleanup(osc, OBD_CLEANUP_EARLY));
2212 static int mds_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2218 case OBD_CLEANUP_EARLY:
2220 case OBD_CLEANUP_EXPORTS:
2221 /*XXX Use this for mdd mds cleanup, so comment out
2222 *this target_cleanup_recovery for this tmp MDD MDS
2224 if (strncmp(obd->obd_name, MDD_OBD_NAME, strlen(MDD_OBD_NAME)))
2225 target_cleanup_recovery(obd);
2226 mds_lov_early_clean(obd);
2228 case OBD_CLEANUP_SELF_EXP:
2229 mds_lov_disconnect(obd);
2231 llog_cleanup(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT));
2232 llog_cleanup(llog_get_context(obd, LLOG_LOVEA_ORIG_CTXT));
2233 rc = obd_llog_finish(obd, 0);
2235 case OBD_CLEANUP_OBD:
2241 static int mds_cleanup(struct obd_device *obd)
2243 struct mds_obd *mds = &obd->u.mds;
2244 lvfs_sbdev_type save_dev;
2247 if (obd->u.obt.obt_sb == NULL)
2249 save_dev = lvfs_sbdev(obd->u.obt.obt_sb);
2251 if (mds->mds_osc_exp)
2252 /* lov export was disconnected by mds_lov_clean;
2253 we just need to drop our ref */
2254 class_export_put(mds->mds_osc_exp);
2256 lprocfs_obd_cleanup(obd);
2257 lprocfs_free_obd_stats(obd);
2259 lquota_cleanup(mds_quota_interface_ref, obd);
2261 mds_update_server_data(obd, 1);
2263 mds_lov_destroy_objids(obd);
2265 mds_fs_cleanup(obd);
2268 upcall_cache_cleanup(mds->mds_group_hash);
2269 mds->mds_group_hash = NULL;
2272 server_put_mount(obd->obd_name, mds->mds_vfsmnt);
2273 obd->u.obt.obt_sb = NULL;
2275 ldlm_namespace_free(obd->obd_namespace, obd->obd_force);
2277 spin_lock_bh(&obd->obd_processing_task_lock);
2278 if (obd->obd_recovering) {
2279 target_cancel_recovery_timer(obd);
2280 obd->obd_recovering = 0;
2282 spin_unlock_bh(&obd->obd_processing_task_lock);
2284 fsfilt_put_ops(obd->obd_fsops);
2286 LCONSOLE_INFO("MDT %s has stopped.\n", obd->obd_name);
2291 static void fixup_handle_for_resent_req(struct ptlrpc_request *req, int offset,
2292 struct ldlm_lock *new_lock,
2293 struct ldlm_lock **old_lock,
2294 struct lustre_handle *lockh)
2296 struct obd_export *exp = req->rq_export;
2297 struct ldlm_request *dlmreq =
2298 lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*dlmreq));
2299 struct lustre_handle remote_hdl = dlmreq->lock_handle[0];
2300 struct list_head *iter;
2302 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
2305 spin_lock(&exp->exp_ldlm_data.led_lock);
2306 list_for_each(iter, &exp->exp_ldlm_data.led_held_locks) {
2307 struct ldlm_lock *lock;
2308 lock = list_entry(iter, struct ldlm_lock, l_export_chain);
2309 if (lock == new_lock)
2311 if (lock->l_remote_handle.cookie == remote_hdl.cookie) {
2312 lockh->cookie = lock->l_handle.h_cookie;
2313 LDLM_DEBUG(lock, "restoring lock cookie");
2314 DEBUG_REQ(D_DLMTRACE, req,"restoring lock cookie "LPX64,
2317 *old_lock = LDLM_LOCK_GET(lock);
2318 spin_unlock(&exp->exp_ldlm_data.led_lock);
2322 spin_unlock(&exp->exp_ldlm_data.led_lock);
2324 /* If the xid matches, then we know this is a resent request,
2325 * and allow it. (It's probably an OPEN, for which we don't
2328 le64_to_cpu(exp->exp_mds_data.med_mcd->mcd_last_xid))
2332 le64_to_cpu(exp->exp_mds_data.med_mcd->mcd_last_close_xid))
2335 /* This remote handle isn't enqueued, so we never received or
2336 * processed this request. Clear MSG_RESENT, because it can
2337 * be handled like any normal request now. */
2339 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
2341 DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle "LPX64,
2345 int intent_disposition(struct ldlm_reply *rep, int flag)
2349 return (rep->lock_policy_res1 & flag);
2352 void intent_set_disposition(struct ldlm_reply *rep, int flag)
2356 rep->lock_policy_res1 |= flag;
2359 static int mds_intent_policy(struct ldlm_namespace *ns,
2360 struct ldlm_lock **lockp, void *req_cookie,
2361 ldlm_mode_t mode, int flags, void *data)
2363 struct ptlrpc_request *req = req_cookie;
2364 struct ldlm_lock *lock = *lockp;
2365 struct ldlm_intent *it;
2366 struct mds_obd *mds = &req->rq_export->exp_obd->u.mds;
2367 struct ldlm_reply *rep;
2368 struct lustre_handle lockh = { 0 };
2369 struct ldlm_lock *new_lock = NULL;
2370 int getattr_part = MDS_INODELOCK_UPDATE;
2371 int repsize[5] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
2372 [DLM_LOCKREPLY_OFF] = sizeof(struct ldlm_reply),
2373 [DLM_REPLY_REC_OFF] = sizeof(struct mds_body),
2374 [DLM_REPLY_REC_OFF+1] = mds->mds_max_mdsize };
2375 int repbufcnt = 4, rc;
2378 LASSERT(req != NULL);
2380 if (lustre_msg_bufcount(req->rq_reqmsg) <= DLM_INTENT_IT_OFF) {
2381 /* No intent was provided */
2382 rc = lustre_pack_reply(req, 2, repsize, NULL);
2388 it = lustre_swab_reqbuf(req, DLM_INTENT_IT_OFF, sizeof(*it),
2389 lustre_swab_ldlm_intent);
2391 CERROR("Intent missing\n");
2392 RETURN(req->rq_status = -EFAULT);
2395 LDLM_DEBUG(lock, "intent policy, opc: %s", ldlm_it2str(it->opc));
2397 if ((req->rq_export->exp_connect_flags & OBD_CONNECT_ACL) &&
2398 (it->opc & (IT_OPEN | IT_GETATTR | IT_LOOKUP)))
2399 /* we should never allow OBD_CONNECT_ACL if not configured */
2400 repsize[repbufcnt++] = LUSTRE_POSIX_ACL_MAX_SIZE;
2401 else if (it->opc & IT_UNLINK)
2402 repsize[repbufcnt++] = mds->mds_max_cookiesize;
2404 rc = lustre_pack_reply(req, repbufcnt, repsize, NULL);
2406 RETURN(req->rq_status = rc);
2408 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF, sizeof(*rep));
2409 intent_set_disposition(rep, DISP_IT_EXECD);
2412 /* execute policy */
2413 switch ((long)it->opc) {
2415 case IT_CREAT|IT_OPEN:
2416 mds_counter_incr(req->rq_export, LPROC_MDS_OPEN);
2417 fixup_handle_for_resent_req(req, DLM_LOCKREQ_OFF, lock, NULL,
2419 /* XXX swab here to assert that an mds_open reint
2420 * packet is following */
2421 rep->lock_policy_res2 = mds_reint(req, DLM_INTENT_REC_OFF,
2424 /* We abort the lock if the lookup was negative and
2425 * we did not make it to the OPEN portion */
2426 if (!intent_disposition(rep, DISP_LOOKUP_EXECD))
2427 RETURN(ELDLM_LOCK_ABORTED);
2428 if (intent_disposition(rep, DISP_LOOKUP_NEG) &&
2429 !intent_disposition(rep, DISP_OPEN_OPEN))
2432 /* If there was an error of some sort or if we are not
2433 * returning any locks */
2434 if (rep->lock_policy_res2 ||
2435 !intent_disposition(rep, DISP_OPEN_LOCK))
2436 RETURN(ELDLM_LOCK_ABORTED);
2439 getattr_part = MDS_INODELOCK_LOOKUP;
2441 getattr_part |= MDS_INODELOCK_LOOKUP;
2442 OBD_COUNTER_INCREMENT(req->rq_export->exp_obd, getattr);
2444 fixup_handle_for_resent_req(req, DLM_LOCKREQ_OFF, lock,
2447 /* INODEBITS_INTEROP: if this lock was converted from a
2448 * plain lock (client does not support inodebits), then
2449 * child lock must be taken with both lookup and update
2450 * bits set for all operations.
2452 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS))
2453 getattr_part = MDS_INODELOCK_LOOKUP |
2454 MDS_INODELOCK_UPDATE;
2456 rep->lock_policy_res2 = mds_getattr_lock(req,DLM_INTENT_REC_OFF,
2457 getattr_part, &lockh);
2458 /* FIXME: LDLM can set req->rq_status. MDS sets
2459 policy_res{1,2} with disposition and status.
2460 - replay: returns 0 & req->status is old status
2461 - otherwise: returns req->status */
2462 if (intent_disposition(rep, DISP_LOOKUP_NEG))
2463 rep->lock_policy_res2 = 0;
2464 if (!intent_disposition(rep, DISP_LOOKUP_POS) ||
2465 rep->lock_policy_res2)
2466 RETURN(ELDLM_LOCK_ABORTED);
2467 if (req->rq_status != 0) {
2469 rep->lock_policy_res2 = req->rq_status;
2470 RETURN(ELDLM_LOCK_ABORTED);
2474 CERROR("Unhandled intent "LPD64"\n", it->opc);
2478 /* By this point, whatever function we called above must have either
2479 * filled in 'lockh', been an intent replay, or returned an error. We
2480 * want to allow replayed RPCs to not get a lock, since we would just
2481 * drop it below anyways because lock replay is done separately by the
2482 * client afterwards. For regular RPCs we want to give the new lock to
2483 * the client instead of whatever lock it was about to get. */
2484 if (new_lock == NULL)
2485 new_lock = ldlm_handle2lock(&lockh);
2486 if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY))
2489 LASSERTF(new_lock != NULL, "op "LPX64" lockh "LPX64"\n",
2490 it->opc, lockh.cookie);
2492 /* If we've already given this lock to a client once, then we should
2493 * have no readers or writers. Otherwise, we should have one reader
2494 * _or_ writer ref (which will be zeroed below) before returning the
2495 * lock to a client. */
2496 if (new_lock->l_export == req->rq_export) {
2497 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
2499 LASSERT(new_lock->l_export == NULL);
2500 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
2505 if (new_lock->l_export == req->rq_export) {
2506 /* Already gave this to the client, which means that we
2507 * reconstructed a reply. */
2508 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
2510 RETURN(ELDLM_LOCK_REPLACED);
2513 /* Fixup the lock to be given to the client */
2514 lock_res_and_lock(new_lock);
2515 new_lock->l_readers = 0;
2516 new_lock->l_writers = 0;
2518 new_lock->l_export = class_export_get(req->rq_export);
2519 spin_lock(&req->rq_export->exp_ldlm_data.led_lock);
2520 list_add(&new_lock->l_export_chain,
2521 &new_lock->l_export->exp_ldlm_data.led_held_locks);
2522 spin_unlock(&req->rq_export->exp_ldlm_data.led_lock);
2524 new_lock->l_blocking_ast = lock->l_blocking_ast;
2525 new_lock->l_completion_ast = lock->l_completion_ast;
2527 memcpy(&new_lock->l_remote_handle, &lock->l_remote_handle,
2528 sizeof(lock->l_remote_handle));
2530 new_lock->l_flags &= ~LDLM_FL_LOCAL;
2532 unlock_res_and_lock(new_lock);
2533 LDLM_LOCK_PUT(new_lock);
2535 RETURN(ELDLM_LOCK_REPLACED);
2538 static int mdt_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
2540 struct mds_obd *mds = &obd->u.mds;
2541 struct lprocfs_static_vars lvars;
2542 int mds_min_threads;
2543 int mds_max_threads;
2547 lprocfs_mdt_init_vars(&lvars);
2548 lprocfs_obd_setup(obd, lvars.obd_vars);
2550 sema_init(&mds->mds_health_sem, 1);
2552 if (mds_num_threads) {
2553 /* If mds_num_threads is set, it is the min and the max. */
2554 if (mds_num_threads > MDS_THREADS_MAX)
2555 mds_num_threads = MDS_THREADS_MAX;
2556 if (mds_num_threads < MDS_THREADS_MIN)
2557 mds_num_threads = MDS_THREADS_MIN;
2558 mds_max_threads = mds_min_threads = mds_num_threads;
2560 /* Base min threads on memory and cpus */
2561 mds_min_threads = num_possible_cpus() * num_physpages >>
2562 (27 - CFS_PAGE_SHIFT);
2563 if (mds_min_threads < MDS_THREADS_MIN)
2564 mds_min_threads = MDS_THREADS_MIN;
2565 /* Largest auto threads start value */
2566 if (mds_min_threads > 32)
2567 mds_min_threads = 32;
2568 mds_max_threads = min(MDS_THREADS_MAX, mds_min_threads * 4);
2572 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2573 MDS_MAXREPSIZE, MDS_REQUEST_PORTAL,
2574 MDC_REPLY_PORTAL, MDS_SERVICE_WATCHDOG_TIMEOUT,
2575 mds_handle, LUSTRE_MDS_NAME,
2576 obd->obd_proc_entry, NULL,
2577 mds_min_threads, mds_max_threads, "ll_mdt", 0);
2579 if (!mds->mds_service) {
2580 CERROR("failed to start service\n");
2581 GOTO(err_lprocfs, rc = -ENOMEM);
2584 rc = ptlrpc_start_threads(obd, mds->mds_service);
2586 GOTO(err_thread, rc);
2588 mds->mds_setattr_service =
2589 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2590 MDS_MAXREPSIZE, MDS_SETATTR_PORTAL,
2591 MDC_REPLY_PORTAL, MDS_SERVICE_WATCHDOG_TIMEOUT,
2592 mds_handle, "mds_setattr",
2593 obd->obd_proc_entry, NULL,
2594 mds_min_threads, mds_max_threads,
2596 if (!mds->mds_setattr_service) {
2597 CERROR("failed to start getattr service\n");
2598 GOTO(err_thread, rc = -ENOMEM);
2601 rc = ptlrpc_start_threads(obd, mds->mds_setattr_service);
2603 GOTO(err_thread2, rc);
2605 mds->mds_readpage_service =
2606 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2607 MDS_MAXREPSIZE, MDS_READPAGE_PORTAL,
2608 MDC_REPLY_PORTAL, MDS_SERVICE_WATCHDOG_TIMEOUT,
2609 mds_handle, "mds_readpage",
2610 obd->obd_proc_entry, NULL,
2611 MDS_THREADS_MIN_READPAGE, mds_max_threads,
2613 if (!mds->mds_readpage_service) {
2614 CERROR("failed to start readpage service\n");
2615 GOTO(err_thread2, rc = -ENOMEM);
2618 rc = ptlrpc_start_threads(obd, mds->mds_readpage_service);
2621 GOTO(err_thread3, rc);
2623 ping_evictor_start();
2628 ptlrpc_unregister_service(mds->mds_readpage_service);
2629 mds->mds_readpage_service = NULL;
2631 ptlrpc_unregister_service(mds->mds_setattr_service);
2632 mds->mds_setattr_service = NULL;
2634 ptlrpc_unregister_service(mds->mds_service);
2635 mds->mds_service = NULL;
2637 lprocfs_obd_cleanup(obd);
2641 static int mdt_cleanup(struct obd_device *obd)
2643 struct mds_obd *mds = &obd->u.mds;
2646 ping_evictor_stop();
2648 down(&mds->mds_health_sem);
2649 ptlrpc_unregister_service(mds->mds_readpage_service);
2650 ptlrpc_unregister_service(mds->mds_setattr_service);
2651 ptlrpc_unregister_service(mds->mds_service);
2652 mds->mds_readpage_service = NULL;
2653 mds->mds_setattr_service = NULL;
2654 mds->mds_service = NULL;
2655 up(&mds->mds_health_sem);
2657 lprocfs_obd_cleanup(obd);
2662 static int mdt_health_check(struct obd_device *obd)
2664 struct mds_obd *mds = &obd->u.mds;
2667 down(&mds->mds_health_sem);
2668 rc |= ptlrpc_service_health_check(mds->mds_readpage_service);
2669 rc |= ptlrpc_service_health_check(mds->mds_setattr_service);
2670 rc |= ptlrpc_service_health_check(mds->mds_service);
2671 up(&mds->mds_health_sem);
2674 * health_check to return 0 on healthy
2675 * and 1 on unhealthy.
2683 static struct dentry *mds_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
2686 struct obd_device *obd = data;
2689 fid.generation = gen;
2690 return mds_fid2dentry(&obd->u.mds, &fid, NULL);
2693 static int mds_health_check(struct obd_device *obd)
2695 struct obd_device_target *odt = &obd->u.obt;
2696 #ifdef USE_HEALTH_CHECK_WRITE
2697 struct mds_obd *mds = &obd->u.mds;
2701 if (odt->obt_sb->s_flags & MS_RDONLY)
2704 #ifdef USE_HEALTH_CHECK_WRITE
2705 LASSERT(mds->mds_health_check_filp != NULL);
2706 rc |= !!lvfs_check_io_health(obd, mds->mds_health_check_filp);
2711 static int mds_process_config(struct obd_device *obd, obd_count len, void *buf)
2713 struct lustre_cfg *lcfg = buf;
2714 struct lprocfs_static_vars lvars;
2717 lprocfs_mds_init_vars(&lvars);
2719 rc = class_process_proc_param(PARAM_MDT, lvars.obd_vars, lcfg, obd);
2723 struct lvfs_callback_ops mds_lvfs_ops = {
2724 l_fid2dentry: mds_lvfs_fid2dentry,
2727 /* use obd ops to offer management infrastructure */
2728 static struct obd_ops mds_obd_ops = {
2729 .o_owner = THIS_MODULE,
2730 .o_connect = mds_connect,
2731 .o_reconnect = mds_reconnect,
2732 .o_init_export = mds_init_export,
2733 .o_destroy_export = mds_destroy_export,
2734 .o_disconnect = mds_disconnect,
2735 .o_setup = mds_setup,
2736 .o_precleanup = mds_precleanup,
2737 .o_cleanup = mds_cleanup,
2738 .o_postrecov = mds_postrecov,
2739 .o_statfs = mds_obd_statfs,
2740 .o_iocontrol = mds_iocontrol,
2741 .o_create = mds_obd_create,
2742 .o_destroy = mds_obd_destroy,
2743 .o_llog_init = mds_llog_init,
2744 .o_llog_finish = mds_llog_finish,
2745 .o_notify = mds_notify,
2746 .o_health_check = mds_health_check,
2747 .o_process_config = mds_process_config,
2750 static struct obd_ops mdt_obd_ops = {
2751 .o_owner = THIS_MODULE,
2752 .o_setup = mdt_setup,
2753 .o_cleanup = mdt_cleanup,
2754 .o_health_check = mdt_health_check,
2757 quota_interface_t *mds_quota_interface_ref;
2758 extern quota_interface_t mds_quota_interface;
2760 static __attribute__((unused)) int __init mds_init(void)
2763 struct lprocfs_static_vars lvars;
2765 request_module("lquota");
2766 mds_quota_interface_ref = PORTAL_SYMBOL_GET(mds_quota_interface);
2767 rc = lquota_init(mds_quota_interface_ref);
2769 if (mds_quota_interface_ref)
2770 PORTAL_SYMBOL_PUT(mds_quota_interface);
2773 init_obd_quota_ops(mds_quota_interface_ref, &mds_obd_ops);
2775 lprocfs_mds_init_vars(&lvars);
2776 class_register_type(&mds_obd_ops, NULL,
2777 lvars.module_vars, LUSTRE_MDS_NAME, NULL);
2778 lprocfs_mds_init_vars(&lvars);
2779 mdt_obd_ops = mdt_obd_ops; //make compiler happy
2780 // class_register_type(&mdt_obd_ops, NULL,
2781 // lvars.module_vars, LUSTRE_MDT_NAME, NULL);
2786 static __attribute__((unused)) void /*__exit*/ mds_exit(void)
2788 lquota_exit(mds_quota_interface_ref);
2789 if (mds_quota_interface_ref)
2790 PORTAL_SYMBOL_PUT(mds_quota_interface);
2792 class_unregister_type(LUSTRE_MDS_NAME);
2793 // class_unregister_type(LUSTRE_MDT_NAME);
2795 /*mds still need lov setup here*/
2796 static int mds_cmd_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
2798 struct mds_obd *mds = &obd->u.mds;
2799 struct lvfs_run_ctxt saved;
2801 struct vfsmount *mnt;
2802 struct lustre_sb_info *lsi;
2803 struct lustre_mount_info *lmi;
2804 struct dentry *dentry;
2808 CDEBUG(D_INFO, "obd %s setup \n", obd->obd_name);
2809 if (strncmp(obd->obd_name, MDD_OBD_NAME, strlen(MDD_OBD_NAME)))
2812 if (lcfg->lcfg_bufcount < 5) {
2813 CERROR("invalid arg for setup %s\n", MDD_OBD_NAME);
2816 dev = lustre_cfg_string(lcfg, 4);
2817 lmi = server_get_mount(dev);
2818 LASSERT(lmi != NULL);
2820 lsi = s2lsi(lmi->lmi_sb);
2822 /* FIXME: MDD LOV initialize objects.
2823 * we need only lmi here but not get mount
2824 * OSD did mount already, so put mount back
2826 atomic_dec(&lsi->lsi_mounts);
2829 obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
2830 mds_init_ctxt(obd, mnt);
2832 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2833 dentry = simple_mkdir(current->fs->pwd, "OBJECTS", 0777, 1);
2834 if (IS_ERR(dentry)) {
2835 rc = PTR_ERR(dentry);
2836 CERROR("cannot create OBJECTS directory: rc = %d\n", rc);
2837 GOTO(err_putfs, rc);
2839 mds->mds_objects_dir = dentry;
2841 dentry = lookup_one_len("__iopen__", current->fs->pwd,
2842 strlen("__iopen__"));
2843 if (IS_ERR(dentry)) {
2844 rc = PTR_ERR(dentry);
2845 CERROR("cannot lookup __iopen__ directory: rc = %d\n", rc);
2846 GOTO(err_objects, rc);
2849 mds->mds_fid_de = dentry;
2850 if (!dentry->d_inode || is_bad_inode(dentry->d_inode)) {
2852 CERROR("__iopen__ directory has no inode? rc = %d\n", rc);
2855 rc = mds_lov_init_objids(obd);
2857 CERROR("cannot init lov objid rc = %d\n", rc);
2861 rc = mds_lov_presetup(mds, lcfg);
2863 GOTO(err_objects, rc);
2865 /* Don't wait for mds_postrecov trying to clear orphans */
2866 obd->obd_async_recov = 1;
2867 rc = mds_postsetup(obd);
2868 /* Bug 11557 - allow async abort_recov start
2869 FIXME can remove most of this obd_async_recov plumbing
2870 obd->obd_async_recov = 0;
2874 GOTO(err_objects, rc);
2876 mds->mds_max_mdsize = sizeof(struct lov_mds_md);
2877 mds->mds_max_cookiesize = sizeof(struct llog_cookie);
2880 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2883 dput(mds->mds_fid_de);
2885 dput(mds->mds_objects_dir);
2887 fsfilt_put_ops(obd->obd_fsops);
2891 static int mds_cmd_cleanup(struct obd_device *obd)
2893 struct mds_obd *mds = &obd->u.mds;
2894 struct lvfs_run_ctxt saved;
2899 LCONSOLE_WARN("%s: shutting down for failover; client state "
2900 "will be preserved.\n", obd->obd_name);
2902 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2904 mds_lov_destroy_objids(obd);
2906 if (mds->mds_objects_dir != NULL) {
2907 l_dput(mds->mds_objects_dir);
2908 mds->mds_objects_dir = NULL;
2911 shrink_dcache_parent(mds->mds_fid_de);
2912 dput(mds->mds_fid_de);
2913 LL_DQUOT_OFF(obd->u.obt.obt_sb);
2914 fsfilt_put_ops(obd->obd_fsops);
2916 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2921 static int mds_cmd_health_check(struct obd_device *obd)
2926 static struct obd_ops mds_cmd_obd_ops = {
2927 .o_owner = THIS_MODULE,
2928 .o_setup = mds_cmd_setup,
2929 .o_cleanup = mds_cmd_cleanup,
2930 .o_precleanup = mds_precleanup,
2931 .o_create = mds_obd_create,
2932 .o_destroy = mds_obd_destroy,
2933 .o_llog_init = mds_llog_init,
2934 .o_llog_finish = mds_llog_finish,
2935 .o_notify = mds_notify,
2936 .o_postrecov = mds_postrecov,
2937 // .o_health_check = mds_cmd_health_check,
2940 static int __init mds_cmd_init(void)
2942 struct lprocfs_static_vars lvars;
2944 lprocfs_mds_init_vars(&lvars);
2945 class_register_type(&mds_cmd_obd_ops, NULL, lvars.module_vars,
2946 LUSTRE_MDS_NAME, NULL);
2951 static void /*__exit*/ mds_cmd_exit(void)
2953 class_unregister_type(LUSTRE_MDS_NAME);
2956 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2957 MODULE_DESCRIPTION("Lustre Metadata Server (MDS)");
2958 MODULE_LICENSE("GPL");
2960 module_init(mds_cmd_init);
2961 module_exit(mds_cmd_exit);