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) 2001-2003 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 Lustre, http://www.lustre.org.
15 * Lustre is free software; you can redistribute it and/or
16 * modify it under the terms of version 2 of the GNU General Public
17 * License as published by the Free Software Foundation.
19 * Lustre is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with Lustre; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 # define EXPORT_SYMTAB
32 #define DEBUG_SUBSYSTEM S_MDS
34 #include <linux/module.h>
35 #include <linux/lustre_mds.h>
36 #include <linux/lustre_dlm.h>
37 #include <linux/init.h>
38 #include <linux/obd_class.h>
39 #include <linux/random.h>
41 #include <linux/jbd.h>
42 #include <linux/ext3_fs.h>
43 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
44 # include <linux/smp_lock.h>
45 # include <linux/buffer_head.h>
46 # include <linux/workqueue.h>
47 # include <linux/mount.h>
49 # include <linux/locks.h>
51 #include <linux/obd_lov.h>
52 #include <linux/lustre_mds.h>
53 #include <linux/lustre_fsfilt.h>
54 #include <linux/lprocfs_status.h>
55 #include <linux/lustre_commit_confd.h>
57 #include "mds_internal.h"
59 static int mds_intent_policy(struct ldlm_namespace *ns,
60 struct ldlm_lock **lockp, void *req_cookie,
61 ldlm_mode_t mode, int flags, void *data);
62 static int mds_postsetup(struct obd_device *obd);
63 static int mds_cleanup(struct obd_device *obd, int flags);
65 /* Assumes caller has already pushed into the kernel filesystem context */
66 static int mds_sendpage(struct ptlrpc_request *req, struct file *file,
67 loff_t offset, int count)
69 struct ptlrpc_bulk_desc *desc;
70 struct l_wait_info lwi;
72 int rc = 0, npages, i, tmpcount, tmpsize = 0;
75 LASSERT((offset & (PAGE_SIZE - 1)) == 0); /* I'm dubious about this */
77 npages = (count + PAGE_SIZE - 1) >> PAGE_SHIFT;
78 OBD_ALLOC(pages, sizeof(*pages) * npages);
80 GOTO(out, rc = -ENOMEM);
82 desc = ptlrpc_prep_bulk_exp(req, npages, BULK_PUT_SOURCE,
85 GOTO(out_free, rc = -ENOMEM);
87 for (i = 0, tmpcount = count; i < npages; i++, tmpcount -= tmpsize) {
88 tmpsize = tmpcount > PAGE_SIZE ? PAGE_SIZE : tmpcount;
90 pages[i] = alloc_pages(GFP_KERNEL, 0);
92 GOTO(cleanup_buf, rc = -ENOMEM);
94 ptlrpc_prep_bulk_page(desc, pages[i], 0, tmpsize);
97 for (i = 0, tmpcount = count; i < npages; i++, tmpcount -= tmpsize) {
98 tmpsize = tmpcount > PAGE_SIZE ? PAGE_SIZE : tmpcount;
99 CDEBUG(D_EXT2, "reading %u@%llu from dir %lu (size %llu)\n",
100 tmpsize, offset, file->f_dentry->d_inode->i_ino,
101 file->f_dentry->d_inode->i_size);
103 rc = fsfilt_readpage(req->rq_export->exp_obd, file,
104 page_address(pages[i]), tmpsize, &offset);
107 GOTO(cleanup_buf, rc = -EIO);
110 LASSERT(desc->bd_nob == count);
112 rc = ptlrpc_start_bulk_transfer(desc);
114 GOTO(cleanup_buf, rc);
116 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
117 CERROR("obd_fail_loc=%x, fail operation rc=%d\n",
118 OBD_FAIL_MDS_SENDPAGE, rc);
119 GOTO(abort_bulk, rc);
122 lwi = LWI_TIMEOUT(obd_timeout * HZ / 4, NULL, NULL);
123 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc), &lwi);
124 LASSERT (rc == 0 || rc == -ETIMEDOUT);
127 if (desc->bd_success &&
128 desc->bd_nob_transferred == count)
129 GOTO(cleanup_buf, rc);
131 rc = -ETIMEDOUT; /* XXX should this be a different errno? */
134 DEBUG_REQ(D_ERROR, req, "bulk failed: %s %d(%d), evicting %s@%s\n",
135 (rc == -ETIMEDOUT) ? "timeout" : "network error",
136 desc->bd_nob_transferred, count,
137 req->rq_export->exp_client_uuid.uuid,
138 req->rq_export->exp_connection->c_remote_uuid.uuid);
140 ptlrpc_fail_export(req->rq_export);
144 ptlrpc_abort_bulk (desc);
146 for (i = 0; i < npages; i++)
148 __free_pages(pages[i], 0);
150 ptlrpc_free_bulk(desc);
152 OBD_FREE(pages, sizeof(*pages) * npages);
157 /* only valid locked dentries or errors should be returned */
158 struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
159 struct vfsmount **mnt, int lock_mode,
160 struct lustre_handle *lockh,
161 char *name, int namelen, __u64 lockpart)
163 struct mds_obd *mds = &obd->u.mds;
164 struct dentry *de = mds_fid2dentry(mds, fid, mnt), *retval = de;
165 struct ldlm_res_id res_id = { .name = {0} };
167 ldlm_policy_data_t policy = { .l_inodebits = { lockpart } };
174 res_id.name[0] = de->d_inode->i_ino;
175 res_id.name[1] = de->d_inode->i_generation;
176 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, res_id,
177 LDLM_IBITS, &policy, lock_mode, &flags,
178 mds_blocking_ast, ldlm_completion_ast, NULL, NULL,
179 NULL, 0, NULL, lockh);
180 if (rc != ELDLM_OK) {
182 retval = ERR_PTR(-EIO); /* XXX translate ldlm code */
188 #ifndef DCACHE_DISCONNECTED
189 #define DCACHE_DISCONNECTED DCACHE_NFSD_DISCONNECTED
193 /* Look up an entry by inode number. */
194 /* this function ONLY returns valid dget'd dentries with an initialized inode
196 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
197 struct vfsmount **mnt)
200 unsigned long ino = fid->id;
201 __u32 generation = fid->generation;
203 struct dentry *result;
206 RETURN(ERR_PTR(-ESTALE));
208 snprintf(fid_name, sizeof(fid_name), "0x%lx", ino);
210 CDEBUG(D_DENTRY, "--> mds_fid2dentry: ino/gen %lu/%u, sb %p\n",
211 ino, generation, mds->mds_sb);
213 /* under ext3 this is neither supposed to return bad inodes
215 result = ll_lookup_one_len(fid_name, mds->mds_fid_de, strlen(fid_name));
219 inode = result->d_inode;
221 RETURN(ERR_PTR(-ENOENT));
223 if (generation && inode->i_generation != generation) {
224 /* we didn't find the right inode.. */
225 CERROR("bad inode %lu, link: %lu ct: %d or generation %u/%u\n",
226 inode->i_ino, (unsigned long)inode->i_nlink,
227 atomic_read(&inode->i_count), inode->i_generation,
230 RETURN(ERR_PTR(-ENOENT));
234 *mnt = mds->mds_vfsmnt;
242 /* Establish a connection to the MDS.
244 * This will set up an export structure for the client to hold state data
245 * about that client, like open files, the last operation number it did
246 * on the server, etc.
248 static int mds_connect(struct lustre_handle *conn, struct obd_device *obd,
249 struct obd_uuid *cluuid)
251 struct obd_export *exp;
252 struct mds_export_data *med; /* */
253 struct mds_client_data *mcd;
254 int rc, abort_recovery;
257 if (!conn || !obd || !cluuid)
260 /* Check for aborted recovery. */
261 spin_lock_bh(&obd->obd_processing_task_lock);
262 abort_recovery = obd->obd_abort_recovery;
263 spin_unlock_bh(&obd->obd_processing_task_lock);
265 target_abort_recovery(obd);
267 /* XXX There is a small race between checking the list and adding a
268 * new connection for the same UUID, but the real threat (list
269 * corruption when multiple different clients connect) is solved.
271 * There is a second race between adding the export to the list,
272 * and filling in the client data below. Hence skipping the case
273 * of NULL mcd above. We should already be controlling multiple
274 * connects at the client, and we can't hold the spinlock over
275 * memory allocations without risk of deadlocking.
277 rc = class_connect(conn, obd, cluuid);
280 exp = class_conn2export(conn);
282 med = &exp->exp_mds_data;
284 OBD_ALLOC(mcd, sizeof(*mcd));
286 CERROR("mds: out of memory for client data\n");
287 GOTO(out, rc = -ENOMEM);
290 memcpy(mcd->mcd_uuid, cluuid, sizeof(mcd->mcd_uuid));
293 rc = mds_client_add(obd, &obd->u.mds, med, -1);
298 OBD_FREE(mcd, sizeof(*mcd));
299 class_disconnect(exp, 0);
301 class_export_put(exp);
306 static int mds_init_export(struct obd_export *exp)
308 struct mds_export_data *med = &exp->exp_mds_data;
310 INIT_LIST_HEAD(&med->med_open_head);
311 spin_lock_init(&med->med_open_lock);
315 static int mds_destroy_export(struct obd_export *export)
317 struct mds_export_data *med;
318 struct obd_device *obd = export->exp_obd;
319 struct obd_run_ctxt saved;
323 med = &export->exp_mds_data;
324 target_destroy_export(export);
326 if (obd_uuid_equals(&export->exp_client_uuid, &obd->obd_uuid))
329 push_ctxt(&saved, &obd->obd_ctxt, NULL);
330 /* Close any open files (which may also cause orphan unlinking). */
331 spin_lock(&med->med_open_lock);
332 while (!list_empty(&med->med_open_head)) {
333 struct list_head *tmp = med->med_open_head.next;
334 struct mds_file_data *mfd =
335 list_entry(tmp, struct mds_file_data, mfd_list);
336 BDEVNAME_DECLARE_STORAGE(btmp);
338 /* bug 1579: fix force-closing for 2.5 */
339 struct dentry *dentry = mfd->mfd_dentry;
341 list_del(&mfd->mfd_list);
342 spin_unlock(&med->med_open_lock);
344 CERROR("force closing client file handle for %*s (%s:%lu)\n",
345 dentry->d_name.len, dentry->d_name.name,
346 ll_bdevname(dentry->d_inode->i_sb, btmp),
347 dentry->d_inode->i_ino);
348 rc = mds_mfd_close(NULL, obd, mfd,
349 !(export->exp_flags & OBD_OPT_FAILOVER));
352 CDEBUG(D_INODE, "Error closing file: %d\n", rc);
353 spin_lock(&med->med_open_lock);
355 spin_unlock(&med->med_open_lock);
356 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
359 mds_client_free(export, !(export->exp_flags & OBD_OPT_FAILOVER));
364 static int mds_disconnect(struct obd_export *exp, int flags)
366 unsigned long irqflags;
371 class_export_get(exp);
373 spin_lock_irqsave(&exp->exp_lock, irqflags);
374 exp->exp_flags = flags;
375 spin_unlock_irqrestore(&exp->exp_lock, irqflags);
377 /* Disconnect early so that clients can't keep using export */
378 rc = class_disconnect(exp, flags);
379 ldlm_cancel_locks_for_export(exp);
381 /* complete all outstanding replies */
382 spin_lock_irqsave(&exp->exp_lock, irqflags);
383 while (!list_empty(&exp->exp_outstanding_replies)) {
384 struct ptlrpc_reply_state *rs =
385 list_entry(exp->exp_outstanding_replies.next,
386 struct ptlrpc_reply_state, rs_exp_list);
387 struct ptlrpc_service *svc = rs->rs_srv_ni->sni_service;
389 spin_lock(&svc->srv_lock);
390 list_del_init(&rs->rs_exp_list);
391 ptlrpc_schedule_difficult_reply(rs);
392 spin_unlock(&svc->srv_lock);
394 spin_unlock_irqrestore(&exp->exp_lock, irqflags);
396 class_export_put(exp);
400 static int mds_getstatus(struct ptlrpc_request *req)
402 struct mds_obd *mds = mds_req2mds(req);
403 struct mds_body *body;
404 int rc, size = sizeof(*body);
407 rc = lustre_pack_reply(req, 1, &size, NULL);
408 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_GETSTATUS_PACK)) {
409 CERROR("mds: out of memory for message: size=%d\n", size);
410 req->rq_status = -ENOMEM; /* superfluous? */
414 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
415 memcpy(&body->fid1, &mds->mds_rootfid, sizeof(body->fid1));
417 /* the last_committed and last_xid fields are filled in for all
418 * replies already - no need to do so here also.
423 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
424 void *data, int flag)
429 if (flag == LDLM_CB_CANCELING) {
430 /* Don't need to do anything here. */
434 /* XXX layering violation! -phil */
435 l_lock(&lock->l_resource->lr_namespace->ns_lock);
436 /* Get this: if mds_blocking_ast is racing with mds_intent_policy,
437 * such that mds_blocking_ast is called just before l_i_p takes the
438 * ns_lock, then by the time we get the lock, we might not be the
439 * correct blocking function anymore. So check, and return early, if
441 if (lock->l_blocking_ast != mds_blocking_ast) {
442 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
446 lock->l_flags |= LDLM_FL_CBPENDING;
447 do_ast = (!lock->l_readers && !lock->l_writers);
448 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
451 struct lustre_handle lockh;
454 LDLM_DEBUG(lock, "already unused, calling ldlm_cli_cancel");
455 ldlm_lock2handle(lock, &lockh);
456 rc = ldlm_cli_cancel(&lockh);
458 CERROR("ldlm_cli_cancel: %d\n", rc);
460 LDLM_DEBUG(lock, "Lock still has references, will be "
466 int mds_get_md(struct obd_device *obd, struct inode *inode, void *md,
474 rc = fsfilt_get_md(obd, inode, md, *size);
479 CERROR("Error %d reading eadata for ino %lu\n",
483 rc = mds_convert_lov_ea(obd, inode, md, lmm_size);
497 /* Call with lock=1 if you want mds_pack_md to take the i_sem.
498 * Call with lock=0 if the caller has already taken the i_sem. */
499 int mds_pack_md(struct obd_device *obd, struct lustre_msg *msg, int offset,
500 struct mds_body *body, struct inode *inode, int lock)
502 struct mds_obd *mds = &obd->u.mds;
508 lmm = lustre_msg_buf(msg, offset, 0);
510 /* Some problem with getting eadata when I sized the reply
512 CDEBUG(D_INFO, "no space reserved for inode %lu MD\n",
516 lmm_size = msg->buflens[offset];
518 /* I don't really like this, but it is a sanity check on the client
519 * MD request. However, if the client doesn't know how much space
520 * to reserve for the MD, it shouldn't be bad to have too much space.
522 if (lmm_size > mds->mds_max_mdsize) {
523 CWARN("Reading MD for inode %lu of %d bytes > max %d\n",
524 inode->i_ino, lmm_size, mds->mds_max_mdsize);
528 rc = mds_get_md(obd, inode, lmm, &lmm_size, lock);
530 if (S_ISDIR(inode->i_mode))
531 body->valid |= OBD_MD_FLDIREA;
533 body->valid |= OBD_MD_FLEASIZE;
534 body->eadatasize = lmm_size;
541 static int mds_getattr_internal(struct obd_device *obd, struct dentry *dentry,
542 struct ptlrpc_request *req,
543 struct mds_body *reqbody, int reply_off)
545 struct mds_body *body;
546 struct inode *inode = dentry->d_inode;
553 body = lustre_msg_buf(req->rq_repmsg, reply_off, sizeof(*body));
554 LASSERT(body != NULL); /* caller prepped reply */
556 mds_pack_inode2fid(&body->fid1, inode);
557 mds_pack_inode2body(body, inode);
559 if ((S_ISREG(inode->i_mode) && (reqbody->valid & OBD_MD_FLEASIZE)) ||
560 (S_ISDIR(inode->i_mode) && (reqbody->valid & OBD_MD_FLDIREA))) {
561 rc = mds_pack_md(obd, req->rq_repmsg, reply_off + 1, body,
564 /* If we have LOV EA data, the OST holds size, atime, mtime */
565 if (!(body->valid & OBD_MD_FLEASIZE) &&
566 !(body->valid & OBD_MD_FLDIREA))
567 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
568 OBD_MD_FLATIME | OBD_MD_FLMTIME);
569 } else if (S_ISLNK(inode->i_mode) &&
570 (reqbody->valid & OBD_MD_LINKNAME) != 0) {
571 char *symname = lustre_msg_buf(req->rq_repmsg, reply_off + 1,0);
574 LASSERT (symname != NULL); /* caller prepped reply */
575 len = req->rq_repmsg->buflens[reply_off + 1];
577 rc = inode->i_op->readlink(dentry, symname, len);
579 CERROR("readlink failed: %d\n", rc);
580 } else if (rc != len - 1) {
581 CERROR ("Unexpected readlink rc %d: expecting %d\n",
585 CDEBUG(D_INODE, "read symlink dest %s\n", symname);
586 body->valid |= OBD_MD_LINKNAME;
587 body->eadatasize = rc + 1;
588 symname[rc] = 0; /* NULL terminate */
596 static int mds_getattr_pack_msg(struct ptlrpc_request *req, struct inode *inode,
599 struct mds_obd *mds = mds_req2mds(req);
600 struct mds_body *body;
601 int rc = 0, size[2] = {sizeof(*body)}, bufcount = 1;
604 body = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*body));
605 LASSERT(body != NULL); /* checked by caller */
606 LASSERT_REQSWABBED(req, offset); /* swabbed by caller */
608 if ((S_ISREG(inode->i_mode) && (body->valid & OBD_MD_FLEASIZE)) ||
609 (S_ISDIR(inode->i_mode) && (body->valid & OBD_MD_FLDIREA))) {
612 rc = fsfilt_get_md(req->rq_export->exp_obd, inode, NULL, 0);
614 CDEBUG(D_INODE, "got %d bytes MD data for inode %lu\n",
618 CERROR("error getting inode %lu MD: rc = %d\n",
621 } else if (rc > mds->mds_max_mdsize) {
623 CERROR("MD size %d larger than maximum possible %u\n",
624 rc, mds->mds_max_mdsize);
629 } else if (S_ISLNK(inode->i_mode) && (body->valid & OBD_MD_LINKNAME)) {
630 if (inode->i_size + 1 != body->eadatasize)
631 CERROR("symlink size: %Lu, reply space: %d\n",
632 inode->i_size + 1, body->eadatasize);
633 size[bufcount] = min_t(int, inode->i_size+1, body->eadatasize);
635 CDEBUG(D_INODE, "symlink size: %Lu, reply space: %d\n",
636 inode->i_size + 1, body->eadatasize);
639 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
640 CERROR("failed MDS_GETATTR_PACK test\n");
641 req->rq_status = -ENOMEM;
642 GOTO(out, rc = -ENOMEM);
645 rc = lustre_pack_reply(req, bufcount, size, NULL);
647 CERROR("out of memory\n");
648 GOTO(out, req->rq_status = rc);
656 static int mds_getattr_name(int offset, struct ptlrpc_request *req,
657 struct lustre_handle *child_lockh, int child_part)
659 struct obd_device *obd = req->rq_export->exp_obd;
660 struct ldlm_reply *rep = NULL;
661 struct obd_run_ctxt saved;
662 struct mds_body *body;
663 struct dentry *dparent = NULL, *dchild = NULL;
665 struct lustre_handle parent_lockh;
667 int rc = 0, cleanup_phase = 0, resent_req = 0;
671 LASSERT(!strcmp(obd->obd_type->typ_name, "mds"));
673 /* Swab now, before anyone looks inside the request */
675 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
676 lustre_swab_mds_body);
678 CERROR("Can't swab mds_body\n");
679 GOTO(cleanup, rc = -EFAULT);
682 LASSERT_REQSWAB(req, offset + 1);
683 name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
685 CERROR("Can't unpack name\n");
686 GOTO(cleanup, rc = -EFAULT);
688 namesize = req->rq_reqmsg->buflens[offset + 1];
690 LASSERT (offset == 0 || offset == 2);
691 /* if requests were at offset 2, the getattr reply goes back at 1 */
693 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
697 uc.ouc_fsuid = body->fsuid;
698 uc.ouc_fsgid = body->fsgid;
699 uc.ouc_cap = body->capability;
700 uc.ouc_suppgid1 = body->suppgid;
701 uc.ouc_suppgid2 = -1;
702 push_ctxt(&saved, &obd->obd_ctxt, &uc);
703 cleanup_phase = 1; /* kernel context */
704 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
706 /* FIXME: handle raw lookup */
708 if (body->valid == OBD_MD_FLID) {
709 struct mds_body *mds_reply;
710 int size = sizeof(*mds_reply);
712 // The user requested ONLY the inode number, so do a raw lookup
713 rc = lustre_pack_reply(req, 1, &size, NULL);
715 CERROR("out of memory\n");
719 rc = dir->i_op->lookup_raw(dir, name, namesize - 1, &inum);
721 mds_reply = lustre_msg_buf(req->rq_repmsg, offset,
723 mds_reply->fid1.id = inum;
724 mds_reply->valid = OBD_MD_FLID;
729 if (child_lockh->cookie != 0) {
730 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT);
734 if (resent_req == 0) {
735 rc = mds_get_parent_child_locked(obd, &obd->u.mds, &body->fid1,
736 &parent_lockh, &dparent,
737 LCK_PR, MDS_INODELOCK_UPDATE,
739 child_lockh, &dchild, LCK_PR,
744 struct ldlm_lock *granted_lock;
745 struct ll_fid child_fid;
746 struct ldlm_resource *res;
747 DEBUG_REQ(D_DLMTRACE, req, "resent, not enqueuing new locks");
748 granted_lock = ldlm_handle2lock(child_lockh);
749 LASSERT(granted_lock);
751 res = granted_lock->l_resource;
752 child_fid.id = res->lr_name.name[0];
753 child_fid.generation = res->lr_name.name[1];
754 dchild = mds_fid2dentry(&obd->u.mds, &child_fid, NULL);
756 LDLM_LOCK_PUT(granted_lock);
759 cleanup_phase = 2; /* dchild, dparent, locks */
761 if (dchild->d_inode == NULL) {
762 intent_set_disposition(rep, DISP_LOOKUP_NEG);
763 /* in the intent case, the policy clears this error:
764 the disposition is enough */
765 GOTO(cleanup, rc = -ENOENT);
767 intent_set_disposition(rep, DISP_LOOKUP_POS);
770 if (req->rq_repmsg == NULL) {
771 rc = mds_getattr_pack_msg(req, dchild->d_inode, offset);
773 CERROR ("mds_getattr_pack_msg: %d\n", rc);
778 rc = mds_getattr_internal(obd, dchild, req, body, offset);
779 GOTO(cleanup, rc); /* returns the lock to the client */
782 switch (cleanup_phase) {
784 if (resent_req == 0) {
785 if (rc && dchild->d_inode)
786 ldlm_lock_decref(child_lockh, LCK_PR);
787 ldlm_lock_decref(&parent_lockh, LCK_PR);
792 pop_ctxt(&saved, &obd->obd_ctxt, &uc);
798 static int mds_getattr(int offset, struct ptlrpc_request *req)
800 struct mds_obd *mds = mds_req2mds(req);
801 struct obd_device *obd = req->rq_export->exp_obd;
802 struct obd_run_ctxt saved;
804 struct mds_body *body;
809 body = lustre_swab_reqbuf (req, offset, sizeof (*body),
810 lustre_swab_mds_body);
812 CERROR ("Can't unpack body\n");
816 uc.ouc_fsuid = body->fsuid;
817 uc.ouc_fsgid = body->fsgid;
818 uc.ouc_cap = body->capability;
819 push_ctxt(&saved, &obd->obd_ctxt, &uc);
820 de = mds_fid2dentry(mds, &body->fid1, NULL);
822 rc = req->rq_status = -ENOENT;
823 GOTO(out_pop, PTR_ERR(de));
826 rc = mds_getattr_pack_msg(req, de->d_inode, offset);
828 CERROR ("mds_getattr_pack_msg: %d\n", rc);
832 req->rq_status = mds_getattr_internal(obd, de, req, body, 0);
837 pop_ctxt(&saved, &obd->obd_ctxt, &uc);
842 static int mds_obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
843 unsigned long max_age)
847 spin_lock(&obd->obd_osfs_lock);
848 rc = fsfilt_statfs(obd, obd->u.mds.mds_sb, max_age);
850 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
851 spin_unlock(&obd->obd_osfs_lock);
856 static int mds_statfs(struct ptlrpc_request *req)
858 struct obd_device *obd = req->rq_export->exp_obd;
859 int rc, size = sizeof(struct obd_statfs);
862 rc = lustre_pack_reply(req, 1, &size, NULL);
863 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK)) {
864 CERROR("mds: statfs lustre_pack_reply failed: rc = %d\n", rc);
868 /* We call this so that we can cache a bit - 1 jiffie worth */
869 rc = mds_obd_statfs(obd, lustre_msg_buf(req->rq_repmsg, 0, size),
872 CERROR("mds_obd_statfs failed: rc %d\n", rc);
882 static int mds_sync(struct ptlrpc_request *req)
884 struct obd_device *obd = req->rq_export->exp_obd;
885 struct mds_obd *mds = &obd->u.mds;
886 struct mds_body *body;
887 int rc, size = sizeof(*body);
890 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
892 GOTO(out, rc = -EPROTO);
894 rc = lustre_pack_reply(req, 1, &size, NULL);
895 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK)) {
896 CERROR("fsync lustre_pack_reply failed: rc = %d\n", rc);
900 if (body->fid1.id == 0) {
901 /* a fid of zero is taken to mean "sync whole filesystem" */
902 rc = fsfilt_sync(obd, mds->mds_sb);
906 /* just any file to grab fsync method - "file" arg unused */
907 struct file *file = mds->mds_rcvd_filp;
910 de = mds_fid2dentry(mds, &body->fid1, NULL);
912 GOTO(out, rc = PTR_ERR(de));
914 rc = file->f_op->fsync(NULL, de, 1);
919 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
920 mds_pack_inode2fid(&body->fid1, de->d_inode);
921 mds_pack_inode2body(body, de->d_inode);
928 /* mds_readpage does not take a DLM lock on the inode, because the client must
929 * already have a PR lock.
931 * If we were to take another one here, a deadlock will result, if another
932 * thread is already waiting for a PW lock. */
933 static int mds_readpage(struct ptlrpc_request *req)
935 struct obd_device *obd = req->rq_export->exp_obd;
936 struct vfsmount *mnt;
939 struct mds_body *body, *repbody;
940 struct obd_run_ctxt saved;
941 int rc, size = sizeof(*repbody);
945 rc = lustre_pack_reply(req, 1, &size, NULL);
946 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK)) {
947 CERROR("mds: out of memory\n");
948 GOTO(out, rc = -ENOMEM);
951 body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
953 GOTO (out, rc = -EFAULT);
955 uc.ouc_fsuid = body->fsuid;
956 uc.ouc_fsgid = body->fsgid;
957 uc.ouc_cap = body->capability;
958 push_ctxt(&saved, &obd->obd_ctxt, &uc);
959 de = mds_fid2dentry(&obd->u.mds, &body->fid1, &mnt);
961 GOTO(out_pop, rc = PTR_ERR(de));
963 CDEBUG(D_INODE, "ino %lu\n", de->d_inode->i_ino);
965 file = dentry_open(de, mnt, O_RDONLY | O_LARGEFILE);
966 /* note: in case of an error, dentry_open puts dentry */
968 GOTO(out_pop, rc = PTR_ERR(file));
970 /* body->size is actually the offset -eeb */
971 if ((body->size & (de->d_inode->i_blksize - 1)) != 0) {
972 CERROR("offset "LPU64" not on a block boundary of %lu\n",
973 body->size, de->d_inode->i_blksize);
974 GOTO(out_file, rc = -EFAULT);
977 /* body->nlink is actually the #bytes to read -eeb */
978 if (body->nlink & (de->d_inode->i_blksize - 1)) {
979 CERROR("size %u is not multiple of blocksize %lu\n",
980 body->nlink, de->d_inode->i_blksize);
981 GOTO(out_file, rc = -EFAULT);
984 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*repbody));
985 repbody->size = file->f_dentry->d_inode->i_size;
986 repbody->valid = OBD_MD_FLSIZE;
988 /* to make this asynchronous make sure that the handling function
989 doesn't send a reply when this function completes. Instead a
990 callback function would send the reply */
991 /* body->size is actually the offset -eeb */
992 rc = mds_sendpage(req, file, body->size, body->nlink);
997 pop_ctxt(&saved, &obd->obd_ctxt, &uc);
1003 int mds_reint(struct ptlrpc_request *req, int offset,
1004 struct lustre_handle *lockh)
1006 struct mds_update_record *rec; /* 116 bytes on the stack? no sir! */
1009 OBD_ALLOC(rec, sizeof(*rec));
1013 rc = mds_update_unpack(req, offset, rec);
1014 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNPACK)) {
1015 CERROR("invalid record\n");
1016 GOTO(out, req->rq_status = -EINVAL);
1018 /* rc will be used to interrupt a for loop over multiple records */
1019 rc = mds_reint_rec(rec, offset, req, lockh);
1021 OBD_FREE(rec, sizeof(*rec));
1025 static int mds_filter_recovery_request(struct ptlrpc_request *req,
1026 struct obd_device *obd, int *process)
1028 switch (req->rq_reqmsg->opc) {
1029 case MDS_CONNECT: /* This will never get here, but for completeness. */
1030 case OST_CONNECT: /* This will never get here, but for completeness. */
1031 case MDS_DISCONNECT:
1032 case OST_DISCONNECT:
1037 case MDS_SYNC: /* used in unmounting */
1041 *process = target_queue_recovery_request(req, obd);
1045 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
1047 /* XXX what should we set rq_status to here? */
1048 req->rq_status = -EAGAIN;
1049 RETURN(ptlrpc_error(req));
1053 static char *reint_names[] = {
1054 [REINT_SETATTR] "setattr",
1055 [REINT_CREATE] "create",
1056 [REINT_LINK] "link",
1057 [REINT_UNLINK] "unlink",
1058 [REINT_RENAME] "rename",
1059 [REINT_OPEN] "open",
1062 int mds_handle(struct ptlrpc_request *req)
1064 int should_process, fail = OBD_FAIL_MDS_ALL_REPLY_NET;
1066 struct mds_obd *mds = NULL; /* quell gcc overwarning */
1067 struct obd_device *obd = NULL;
1070 OBD_FAIL_RETURN(OBD_FAIL_MDS_ALL_REQUEST_NET | OBD_FAIL_ONCE, 0);
1072 LASSERT(current->journal_info == NULL);
1073 /* XXX identical to OST */
1074 if (req->rq_reqmsg->opc != MDS_CONNECT) {
1075 struct mds_export_data *med;
1076 int recovering, abort_recovery;
1078 if (req->rq_export == NULL) {
1079 CERROR("lustre_mds: operation %d on unconnected MDS\n",
1080 req->rq_reqmsg->opc);
1081 req->rq_status = -ENOTCONN;
1082 GOTO(out, rc = -ENOTCONN);
1085 med = &req->rq_export->exp_mds_data;
1086 obd = req->rq_export->exp_obd;
1089 /* Check for aborted recovery. */
1090 spin_lock_bh(&obd->obd_processing_task_lock);
1091 abort_recovery = obd->obd_abort_recovery;
1092 recovering = obd->obd_recovering;
1093 spin_unlock_bh(&obd->obd_processing_task_lock);
1094 if (abort_recovery) {
1095 target_abort_recovery(obd);
1096 } else if (recovering) {
1097 rc = mds_filter_recovery_request(req, obd,
1099 if (rc || !should_process)
1104 switch (req->rq_reqmsg->opc) {
1106 DEBUG_REQ(D_INODE, req, "connect");
1107 OBD_FAIL_RETURN(OBD_FAIL_MDS_CONNECT_NET, 0);
1108 rc = target_handle_connect(req, mds_handle);
1110 /* Now that we have an export, set mds. */
1111 mds = mds_req2mds(req);
1114 case MDS_DISCONNECT:
1115 DEBUG_REQ(D_INODE, req, "disconnect");
1116 OBD_FAIL_RETURN(OBD_FAIL_MDS_DISCONNECT_NET, 0);
1117 rc = target_handle_disconnect(req);
1118 req->rq_status = rc; /* superfluous? */
1122 DEBUG_REQ(D_INODE, req, "getstatus");
1123 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETSTATUS_NET, 0);
1124 rc = mds_getstatus(req);
1128 DEBUG_REQ(D_INODE, req, "getattr");
1129 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NET, 0);
1130 rc = mds_getattr(0, req);
1133 case MDS_GETATTR_NAME: {
1134 struct lustre_handle lockh;
1135 DEBUG_REQ(D_INODE, req, "getattr_name");
1136 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NAME_NET, 0);
1138 /* If this request gets a reconstructed reply, we won't be
1139 * acquiring any new locks in mds_getattr_name, so we don't
1143 rc = mds_getattr_name(0, req, &lockh, MDS_INODELOCK_UPDATE);
1144 /* this non-intent call (from an ioctl) is special */
1145 req->rq_status = rc;
1146 if (rc == 0 && lockh.cookie)
1147 ldlm_lock_decref(&lockh, LCK_PR);
1151 DEBUG_REQ(D_INODE, req, "statfs");
1152 OBD_FAIL_RETURN(OBD_FAIL_MDS_STATFS_NET, 0);
1153 rc = mds_statfs(req);
1157 DEBUG_REQ(D_INODE, req, "readpage");
1158 OBD_FAIL_RETURN(OBD_FAIL_MDS_READPAGE_NET, 0);
1159 rc = mds_readpage(req);
1161 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_SENDPAGE)) {
1162 if (req->rq_reply_state) {
1163 lustre_free_reply_state (req->rq_reply_state);
1164 req->rq_reply_state = NULL;
1172 __u32 *opcp = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*opcp));
1174 int size[3] = {sizeof(struct mds_body), mds->mds_max_mdsize,
1175 mds->mds_max_cookiesize};
1178 /* NB only peek inside req now; mds_reint() will swab it */
1180 CERROR ("Can't inspect opcode\n");
1185 if (lustre_msg_swabbed (req->rq_reqmsg))
1188 DEBUG_REQ(D_INODE, req, "reint %d (%s)", opc,
1189 (opc < sizeof(reint_names) / sizeof(reint_names[0]) ||
1190 reint_names[opc] == NULL) ? reint_names[opc] :
1193 OBD_FAIL_RETURN(OBD_FAIL_MDS_REINT_NET, 0);
1195 if (opc == REINT_UNLINK)
1197 else if (opc == REINT_OPEN || opc == REINT_RENAME)
1202 rc = lustre_pack_reply(req, bufcount, size, NULL);
1206 rc = mds_reint(req, 0, NULL);
1207 fail = OBD_FAIL_MDS_REINT_NET_REP;
1212 DEBUG_REQ(D_INODE, req, "close");
1213 OBD_FAIL_RETURN(OBD_FAIL_MDS_CLOSE_NET, 0);
1214 rc = mds_close(req);
1217 case MDS_DONE_WRITING:
1218 DEBUG_REQ(D_INODE, req, "done_writing");
1219 OBD_FAIL_RETURN(OBD_FAIL_MDS_DONE_WRITING_NET, 0);
1220 rc = mds_done_writing(req);
1224 DEBUG_REQ(D_INODE, req, "pin");
1225 OBD_FAIL_RETURN(OBD_FAIL_MDS_PIN_NET, 0);
1230 DEBUG_REQ(D_INODE, req, "sync");
1231 OBD_FAIL_RETURN(OBD_FAIL_MDS_SYNC_NET, 0);
1236 DEBUG_REQ(D_INODE, req, "ping");
1237 rc = target_handle_ping(req);
1240 case OBD_LOG_CANCEL:
1241 CDEBUG(D_INODE, "log cancel\n");
1242 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1243 rc = -ENOTSUPP; /* la la la */
1247 DEBUG_REQ(D_INODE, req, "enqueue");
1248 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1249 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1250 ldlm_server_blocking_ast, NULL);
1253 DEBUG_REQ(D_INODE, req, "convert");
1254 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1255 rc = ldlm_handle_convert(req);
1257 case LDLM_BL_CALLBACK:
1258 case LDLM_CP_CALLBACK:
1259 DEBUG_REQ(D_INODE, req, "callback");
1260 CERROR("callbacks should not happen on MDS\n");
1262 OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
1264 case LLOG_ORIGIN_HANDLE_CREATE:
1265 DEBUG_REQ(D_INODE, req, "llog_init");
1266 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1267 rc = llog_origin_handle_create(req);
1269 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1270 DEBUG_REQ(D_INODE, req, "llog next block");
1271 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1272 rc = llog_origin_handle_next_block(req);
1274 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1275 DEBUG_REQ(D_INODE, req, "llog read header");
1276 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1277 rc = llog_origin_handle_read_header(req);
1279 case LLOG_ORIGIN_HANDLE_CLOSE:
1280 DEBUG_REQ(D_INODE, req, "llog close");
1281 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1282 rc = llog_origin_handle_close(req);
1285 DEBUG_REQ(D_INODE, req, "llog catinfo");
1286 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1287 rc = llog_catinfo(req);
1290 req->rq_status = -ENOTSUPP;
1291 rc = ptlrpc_error(req);
1295 LASSERT(current->journal_info == NULL);
1299 /* If we're DISCONNECTing, the mds_export_data is already freed */
1300 if (!rc && req->rq_reqmsg->opc != MDS_DISCONNECT) {
1301 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1302 struct obd_device *obd = list_entry(mds, struct obd_device,
1304 req->rq_repmsg->last_xid =
1305 le64_to_cpu(med->med_mcd->mcd_last_xid);
1307 if (!obd->obd_no_transno) {
1308 req->rq_repmsg->last_committed =
1309 obd->obd_last_committed;
1311 DEBUG_REQ(D_IOCTL, req,
1312 "not sending last_committed update");
1314 CDEBUG(D_INFO, "last_transno "LPU64", last_committed "LPU64
1316 mds->mds_last_transno, obd->obd_last_committed,
1321 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) {
1322 if (obd && obd->obd_recovering) {
1323 DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply");
1324 return target_queue_final_reply(req, rc);
1326 /* Lost a race with recovery; let the error path DTRT. */
1327 rc = req->rq_status = -ENOTCONN;
1330 target_send_reply(req, rc, fail);
1334 /* Update the server data on disk. This stores the new mount_count and
1335 * also the last_rcvd value to disk. If we don't have a clean shutdown,
1336 * then the server last_rcvd value may be less than that of the clients.
1337 * This will alert us that we may need to do client recovery.
1339 * Also assumes for mds_last_transno that we are not modifying it (no locking).
1341 int mds_update_server_data(struct obd_device *obd, int force_sync)
1343 struct mds_obd *mds = &obd->u.mds;
1344 struct mds_server_data *msd = mds->mds_server_data;
1345 struct file *filp = mds->mds_rcvd_filp;
1346 struct obd_run_ctxt saved;
1351 push_ctxt(&saved, &obd->obd_ctxt, NULL);
1352 msd->msd_last_transno = cpu_to_le64(mds->mds_last_transno);
1354 CDEBUG(D_SUPER, "MDS mount_count is "LPU64", last_transno is "LPU64"\n",
1355 mds->mds_mount_count, mds->mds_last_transno);
1356 rc = fsfilt_write_record(obd, filp, msd, sizeof(*msd), &off,force_sync);
1358 CERROR("error writing MDS server data: rc = %d\n", rc);
1359 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
1365 /* mount the file system (secretly) */
1366 static int mds_setup(struct obd_device *obd, obd_count len, void *buf)
1368 struct lprocfs_static_vars lvars;
1369 struct lustre_cfg* lcfg = buf;
1370 struct mds_obd *mds = &obd->u.mds;
1371 struct vfsmount *mnt;
1376 dev_clear_rdonly(2);
1378 if (!lcfg->lcfg_inlbuf1 || !lcfg->lcfg_inlbuf2)
1379 RETURN(rc = -EINVAL);
1381 obd->obd_fsops = fsfilt_get_ops(lcfg->lcfg_inlbuf2);
1382 if (IS_ERR(obd->obd_fsops))
1383 RETURN(rc = PTR_ERR(obd->obd_fsops));
1385 if (!(page = __get_free_page(GFP_KERNEL)))
1388 memset((void *)page, 0, PAGE_SIZE);
1389 sprintf((char *)page, "iopen_nopriv,errors=remount-ro");
1391 mnt = do_kern_mount(lcfg->lcfg_inlbuf2, 0,
1392 lcfg->lcfg_inlbuf1, (void *)page);
1396 CERROR("do_kern_mount failed: rc = %d\n", rc);
1400 CDEBUG(D_SUPER, "%s: mnt = %p\n", lcfg->lcfg_inlbuf1, mnt);
1402 sema_init(&mds->mds_orphan_recovery_sem, 1);
1403 sema_init(&mds->mds_epoch_sem, 1);
1404 spin_lock_init(&mds->mds_transno_lock);
1405 mds->mds_max_mdsize = sizeof(struct lov_mds_md);
1406 mds->mds_max_cookiesize = sizeof(struct llog_cookie);
1407 atomic_set(&mds->mds_open_count, 0);
1409 obd->obd_namespace = ldlm_namespace_new("mds_server",
1410 LDLM_NAMESPACE_SERVER);
1411 if (obd->obd_namespace == NULL) {
1412 mds_cleanup(obd, 0);
1413 GOTO(err_put, rc = -ENOMEM);
1415 ldlm_register_intent(obd->obd_namespace, mds_intent_policy);
1417 rc = mds_fs_setup(obd, mnt);
1419 CERROR("MDS filesystem method init failed: rc = %d\n", rc);
1423 rc = llog_start_commit_thread();
1427 if (lcfg->lcfg_inllen3 > 0 && lcfg->lcfg_inlbuf3) {
1430 generate_random_uuid(uuid);
1431 class_uuid_unparse(uuid, &mds->mds_lov_uuid);
1433 OBD_ALLOC(mds->mds_profile, lcfg->lcfg_inllen3);
1434 if (mds->mds_profile == NULL)
1435 GOTO(err_fs, rc = -ENOMEM);
1437 memcpy(mds->mds_profile, lcfg->lcfg_inlbuf3,
1438 lcfg->lcfg_inllen3);
1442 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1443 "mds_ldlm_client", &obd->obd_ldlm_client);
1444 obd->obd_replayable = 1;
1446 rc = mds_postsetup(obd);
1450 lprocfs_init_vars(mds, &lvars);
1451 lprocfs_obd_setup(obd, lvars.obd_vars);
1456 /* No extra cleanup needed for llog_init_commit_thread() */
1457 mds_fs_cleanup(obd, 0);
1459 ldlm_namespace_free(obd->obd_namespace, 0);
1460 obd->obd_namespace = NULL;
1463 mntput(mds->mds_vfsmnt);
1467 fsfilt_put_ops(obd->obd_fsops);
1471 static int mds_postsetup(struct obd_device *obd)
1473 struct mds_obd *mds = &obd->u.mds;
1478 rc = llog_setup(obd, LLOG_CONFIG_ORIG_CTXT, obd, 0, NULL,
1483 if (mds->mds_profile) {
1484 struct obd_run_ctxt saved;
1485 struct lustre_profile *lprof;
1486 struct config_llog_instance cfg;
1488 cfg.cfg_instance = NULL;
1489 cfg.cfg_uuid = mds->mds_lov_uuid;
1490 push_ctxt(&saved, &obd->obd_ctxt, NULL);
1491 rc = class_config_parse_llog(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT),
1492 mds->mds_profile, &cfg);
1493 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
1497 lprof = class_get_profile(mds->mds_profile);
1498 if (lprof == NULL) {
1499 CERROR("No profile found: %s\n", mds->mds_profile);
1500 GOTO(err_cleanup, rc = -ENOENT);
1502 rc = mds_lov_connect(obd, lprof->lp_osc);
1504 GOTO(err_cleanup, rc);
1512 llog_cleanup(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT));
1516 static int mds_postrecov(struct obd_device *obd)
1521 LASSERT(!obd->obd_recovering);
1522 LASSERT(llog_get_context(obd, LLOG_UNLINK_ORIG_CTXT) != NULL);
1524 rc = llog_connect(llog_get_context(obd, LLOG_UNLINK_ORIG_CTXT),
1525 obd->u.mds.mds_lov_desc.ld_tgt_count,
1528 CERROR("faild at llog_origin_connect: %d\n", rc);
1531 rc = mds_cleanup_orphans(obd);
1533 rc2 = mds_lov_set_nextid(obd);
1539 int mds_lov_clean(struct obd_device *obd)
1541 struct mds_obd *mds = &obd->u.mds;
1543 if (mds->mds_profile) {
1545 struct config_llog_instance cfg;
1546 struct obd_run_ctxt saved;
1547 int len = strlen(mds->mds_profile) + sizeof("-clean") + 1;
1549 OBD_ALLOC(cln_prof, len);
1550 sprintf(cln_prof, "%s-clean", mds->mds_profile);
1552 cfg.cfg_instance = NULL;
1553 cfg.cfg_uuid = mds->mds_lov_uuid;
1555 push_ctxt(&saved, &obd->obd_ctxt, NULL);
1556 class_config_parse_llog(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT),
1558 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
1560 OBD_FREE(cln_prof, len);
1561 OBD_FREE(mds->mds_profile, strlen(mds->mds_profile) + 1);
1562 mds->mds_profile = NULL;
1567 static int mds_precleanup(struct obd_device *obd, int flags)
1572 mds_lov_disconnect(obd, flags);
1574 llog_cleanup(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT));
1578 static int mds_cleanup(struct obd_device *obd, int flags)
1580 struct mds_obd *mds = &obd->u.mds;
1583 if (mds->mds_sb == NULL)
1586 lprocfs_obd_cleanup(obd);
1588 mds_update_server_data(obd, 1);
1589 if (mds->mds_lov_objids != NULL) {
1590 OBD_FREE(mds->mds_lov_objids,
1591 mds->mds_lov_desc.ld_tgt_count * sizeof(obd_id));
1593 mds_fs_cleanup(obd, flags);
1597 /* 2 seems normal on mds, (may_umount() also expects 2
1598 fwiw), but we only see 1 at this point in obdfilter. */
1599 if (atomic_read(&obd->u.mds.mds_vfsmnt->mnt_count) > 2)
1600 CERROR("%s: mount busy, mnt_count %d != 2\n", obd->obd_name,
1601 atomic_read(&obd->u.mds.mds_vfsmnt->mnt_count));
1603 mntput(mds->mds_vfsmnt);
1607 ldlm_namespace_free(obd->obd_namespace, flags & OBD_OPT_FORCE);
1609 spin_lock_bh(&obd->obd_processing_task_lock);
1610 if (obd->obd_recovering) {
1611 target_cancel_recovery_timer(obd);
1612 obd->obd_recovering = 0;
1614 spin_unlock_bh(&obd->obd_processing_task_lock);
1617 dev_clear_rdonly(2);
1618 fsfilt_put_ops(obd->obd_fsops);
1623 static void fixup_handle_for_resent_req(struct ptlrpc_request *req,
1624 struct ldlm_lock *new_lock,
1625 struct lustre_handle *lockh)
1627 struct obd_export *exp = req->rq_export;
1628 struct obd_device *obd = exp->exp_obd;
1629 struct ldlm_request *dlmreq =
1630 lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*dlmreq));
1631 struct lustre_handle remote_hdl = dlmreq->lock_handle1;
1632 struct list_head *iter;
1634 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
1637 l_lock(&obd->obd_namespace->ns_lock);
1638 list_for_each(iter, &exp->exp_ldlm_data.led_held_locks) {
1639 struct ldlm_lock *lock;
1640 lock = list_entry(iter, struct ldlm_lock, l_export_chain);
1641 if (lock == new_lock)
1643 if (lock->l_remote_handle.cookie == remote_hdl.cookie) {
1644 lockh->cookie = lock->l_handle.h_cookie;
1645 DEBUG_REQ(D_HA, req, "restoring lock cookie "LPX64,
1647 l_unlock(&obd->obd_namespace->ns_lock);
1651 l_unlock(&obd->obd_namespace->ns_lock);
1653 /* This remote handle isn't enqueued, so we never received or
1654 * processed this request. Clear MSG_RESENT, because it can
1655 * be handled like any normal request now. */
1657 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
1659 DEBUG_REQ(D_HA, req, "no existing lock with rhandle "LPX64,
1663 int intent_disposition(struct ldlm_reply *rep, int flag)
1667 return (rep->lock_policy_res1 & flag);
1670 void intent_set_disposition(struct ldlm_reply *rep, int flag)
1674 rep->lock_policy_res1 |= flag;
1677 static int mds_intent_policy(struct ldlm_namespace *ns,
1678 struct ldlm_lock **lockp, void *req_cookie,
1679 ldlm_mode_t mode, int flags, void *data)
1681 struct ptlrpc_request *req = req_cookie;
1682 struct ldlm_lock *lock = *lockp;
1683 struct ldlm_intent *it;
1684 struct mds_obd *mds = &req->rq_export->exp_obd->u.mds;
1685 struct ldlm_reply *rep;
1686 struct lustre_handle lockh = { 0 };
1687 struct ldlm_lock *new_lock;
1688 int getattr_part = MDS_INODELOCK_UPDATE;
1689 int rc, offset = 2, repsize[4] = {sizeof(struct ldlm_reply),
1690 sizeof(struct mds_body),
1691 mds->mds_max_mdsize,
1692 mds->mds_max_cookiesize};
1695 LASSERT(req != NULL);
1697 if (req->rq_reqmsg->bufcount <= 1) {
1698 /* No intent was provided */
1699 int size = sizeof(struct ldlm_reply);
1700 rc = lustre_pack_reply(req, 1, &size, NULL);
1705 it = lustre_swab_reqbuf(req, 1, sizeof(*it), lustre_swab_ldlm_intent);
1707 CERROR("Intent missing\n");
1708 RETURN(req->rq_status = -EFAULT);
1711 LDLM_DEBUG(lock, "intent policy, opc: %s", ldlm_it2str(it->opc));
1713 rc = lustre_pack_reply(req, it->opc == IT_UNLINK ? 4 : 3, repsize,
1716 RETURN(req->rq_status = rc);
1718 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
1719 intent_set_disposition(rep, DISP_IT_EXECD);
1721 fixup_handle_for_resent_req(req, lock, &lockh);
1723 /* execute policy */
1724 switch ((long)it->opc) {
1726 case IT_CREAT|IT_OPEN:
1727 /* XXX swab here to assert that an mds_open reint
1728 * packet is following */
1729 rep->lock_policy_res2 = mds_reint(req, offset, &lockh);
1731 /* We abort the lock if the lookup was negative and
1732 * we did not make it to the OPEN portion */
1733 if (!intent_disposition(rep, DISP_LOOKUP_EXECD))
1734 RETURN(ELDLM_LOCK_ABORTED);
1735 if (intent_disposition(rep, DISP_LOOKUP_NEG) &&
1736 !intent_disposition(rep, DISP_OPEN_OPEN))
1738 RETURN(ELDLM_LOCK_ABORTED);
1741 getattr_part = MDS_INODELOCK_LOOKUP;
1743 getattr_part |= MDS_INODELOCK_LOOKUP;
1745 rep->lock_policy_res2 = mds_getattr_name(offset, req, &lockh,
1747 /* FIXME: LDLM can set req->rq_status. MDS sets
1748 policy_res{1,2} with disposition and status.
1749 - replay: returns 0 & req->status is old status
1750 - otherwise: returns req->status */
1751 if (intent_disposition(rep, DISP_LOOKUP_NEG))
1752 rep->lock_policy_res2 = 0;
1753 if (!intent_disposition(rep, DISP_LOOKUP_POS) ||
1754 rep->lock_policy_res2)
1755 RETURN(ELDLM_LOCK_ABORTED);
1756 if (req->rq_status != 0) {
1758 rep->lock_policy_res2 = req->rq_status;
1759 RETURN(ELDLM_LOCK_ABORTED);
1763 CERROR("Unhandled intent "LPD64"\n", it->opc);
1767 /* By this point, whatever function we called above must have either
1768 * filled in 'lockh', been an intent replay, or returned an error. We
1769 * want to allow replayed RPCs to not get a lock, since we would just
1770 * drop it below anyways because lock replay is done separately by the
1771 * client afterwards. For regular RPCs we want to give the new lock to
1772 * the client instead of whatever lock it was about to get. */
1773 new_lock = ldlm_handle2lock(&lockh);
1774 if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY))
1777 LASSERT(new_lock != NULL);
1779 /* If we've already given this lock to a client once, then we should
1780 * have no readers or writers. Otherwise, we should have one reader
1781 * _or_ writer ref (which will be zeroed below) before returning the
1782 * lock to a client. */
1783 if (new_lock->l_export == req->rq_export) {
1784 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
1786 LASSERT(new_lock->l_export == NULL);
1787 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
1792 if (new_lock->l_export == req->rq_export) {
1793 /* Already gave this to the client, which means that we
1794 * reconstructed a reply. */
1795 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
1797 RETURN(ELDLM_LOCK_REPLACED);
1800 /* Fixup the lock to be given to the client */
1801 l_lock(&new_lock->l_resource->lr_namespace->ns_lock);
1802 new_lock->l_readers = 0;
1803 new_lock->l_writers = 0;
1805 new_lock->l_export = class_export_get(req->rq_export);
1806 list_add(&new_lock->l_export_chain,
1807 &new_lock->l_export->exp_ldlm_data.led_held_locks);
1809 new_lock->l_blocking_ast = lock->l_blocking_ast;
1810 new_lock->l_completion_ast = lock->l_completion_ast;
1812 memcpy(&new_lock->l_remote_handle, &lock->l_remote_handle,
1813 sizeof(lock->l_remote_handle));
1815 new_lock->l_flags &= ~LDLM_FL_LOCAL;
1817 LDLM_LOCK_PUT(new_lock);
1818 l_unlock(&new_lock->l_resource->lr_namespace->ns_lock);
1820 RETURN(ELDLM_LOCK_REPLACED);
1823 static int mdt_setup(struct obd_device *obd, obd_count len, void *buf)
1825 struct mds_obd *mds = &obd->u.mds;
1826 struct lprocfs_static_vars lvars;
1830 lprocfs_init_vars(mdt, &lvars);
1831 lprocfs_obd_setup(obd, lvars.obd_vars);
1834 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
1835 MDS_REQUEST_PORTAL, MDC_REPLY_PORTAL,
1837 obd->obd_proc_entry);
1839 if (!mds->mds_service) {
1840 CERROR("failed to start service\n");
1841 GOTO(err_lprocfs, rc = -ENOMEM);
1844 rc = ptlrpc_start_n_threads(obd, mds->mds_service, MDT_NUM_THREADS,
1847 GOTO(err_thread, rc);
1849 mds->mds_setattr_service =
1850 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
1851 MDS_SETATTR_PORTAL, MDC_REPLY_PORTAL,
1852 mds_handle, "mds_setattr",
1853 obd->obd_proc_entry);
1854 if (!mds->mds_setattr_service) {
1855 CERROR("failed to start getattr service\n");
1856 GOTO(err_thread, rc = -ENOMEM);
1859 rc = ptlrpc_start_n_threads(obd, mds->mds_setattr_service,
1860 MDT_NUM_THREADS, "ll_mdt_attr");
1862 GOTO(err_thread2, rc);
1864 mds->mds_readpage_service =
1865 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
1866 MDS_READPAGE_PORTAL, MDC_REPLY_PORTAL,
1867 mds_handle, "mds_readpage",
1868 obd->obd_proc_entry);
1869 if (!mds->mds_readpage_service) {
1870 CERROR("failed to start readpage service\n");
1871 GOTO(err_thread2, rc = -ENOMEM);
1874 rc = ptlrpc_start_n_threads(obd, mds->mds_readpage_service,
1875 MDT_NUM_THREADS, "ll_mdt_rdpg");
1878 GOTO(err_thread3, rc);
1883 ptlrpc_unregister_service(mds->mds_readpage_service);
1885 ptlrpc_unregister_service(mds->mds_setattr_service);
1887 ptlrpc_unregister_service(mds->mds_service);
1889 lprocfs_obd_cleanup(obd);
1893 static int mdt_cleanup(struct obd_device *obd, int flags)
1895 struct mds_obd *mds = &obd->u.mds;
1898 ptlrpc_stop_all_threads(mds->mds_readpage_service);
1899 ptlrpc_unregister_service(mds->mds_readpage_service);
1901 ptlrpc_stop_all_threads(mds->mds_setattr_service);
1902 ptlrpc_unregister_service(mds->mds_setattr_service);
1904 ptlrpc_stop_all_threads(mds->mds_service);
1905 ptlrpc_unregister_service(mds->mds_service);
1907 lprocfs_obd_cleanup(obd);
1912 static struct dentry *mds_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
1915 struct obd_device *obd = data;
1918 fid.generation = gen;
1919 return mds_fid2dentry(&obd->u.mds, &fid, NULL);
1922 struct lvfs_callback_ops mds_lvfs_ops = {
1923 l_fid2dentry: mds_lvfs_fid2dentry,
1926 /* use obd ops to offer management infrastructure */
1927 static struct obd_ops mds_obd_ops = {
1928 o_owner: THIS_MODULE,
1929 o_connect: mds_connect,
1930 o_init_export: mds_init_export,
1931 o_destroy_export: mds_destroy_export,
1932 o_disconnect: mds_disconnect,
1934 o_precleanup: mds_precleanup,
1935 o_cleanup: mds_cleanup,
1936 o_postrecov: mds_postrecov,
1937 o_statfs: mds_obd_statfs,
1938 o_iocontrol: mds_iocontrol,
1939 o_create: mds_obd_create,
1940 o_destroy: mds_obd_destroy,
1941 o_llog_init: mds_llog_init,
1942 o_llog_finish: mds_llog_finish,
1943 o_notify: mds_notify,
1946 static struct obd_ops mdt_obd_ops = {
1947 o_owner: THIS_MODULE,
1949 o_cleanup: mdt_cleanup,
1952 static int __init mds_init(void)
1954 struct lprocfs_static_vars lvars;
1956 lprocfs_init_vars(mds, &lvars);
1957 class_register_type(&mds_obd_ops, lvars.module_vars, LUSTRE_MDS_NAME);
1958 lprocfs_init_vars(mdt, &lvars);
1959 class_register_type(&mdt_obd_ops, lvars.module_vars, LUSTRE_MDT_NAME);
1964 static void /*__exit*/ mds_exit(void)
1966 class_unregister_type(LUSTRE_MDS_NAME);
1967 class_unregister_type(LUSTRE_MDT_NAME);
1970 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1971 MODULE_DESCRIPTION("Lustre Metadata Server (MDS)");
1972 MODULE_LICENSE("GPL");
1974 module_init(mds_init);
1975 module_exit(mds_exit);