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/obd_ost.h>
53 #include <linux/lustre_mds.h>
54 #include <linux/lustre_fsfilt.h>
55 #include <linux/lprocfs_status.h>
56 #include <linux/lustre_commit_confd.h>
59 #include <linux/lustre_smfs.h>
60 #include <linux/lustre_snap.h>
62 #include "mds_internal.h"
64 static int mds_intent_policy(struct ldlm_namespace *ns,
65 struct ldlm_lock **lockp, void *req_cookie,
66 ldlm_mode_t mode, int flags, void *data);
67 static int mds_postsetup(struct obd_device *obd);
68 static int mds_cleanup(struct obd_device *obd, int flags);
70 /* Assumes caller has already pushed into the kernel filesystem context */
71 static int mds_sendpage(struct ptlrpc_request *req, struct file *file,
72 loff_t offset, int count)
74 struct ptlrpc_bulk_desc *desc;
75 struct l_wait_info lwi;
77 int rc = 0, npages, i, tmpcount, tmpsize = 0;
80 LASSERT((offset & (PAGE_SIZE - 1)) == 0); /* I'm dubious about this */
82 npages = (count + PAGE_SIZE - 1) >> PAGE_SHIFT;
83 OBD_ALLOC(pages, sizeof(*pages) * npages);
85 GOTO(out, rc = -ENOMEM);
87 desc = ptlrpc_prep_bulk_exp(req, npages, BULK_PUT_SOURCE,
90 GOTO(out_free, rc = -ENOMEM);
92 for (i = 0, tmpcount = count; i < npages; i++, tmpcount -= tmpsize) {
93 tmpsize = tmpcount > PAGE_SIZE ? PAGE_SIZE : tmpcount;
95 pages[i] = alloc_pages(GFP_KERNEL, 0);
97 GOTO(cleanup_buf, rc = -ENOMEM);
99 ptlrpc_prep_bulk_page(desc, pages[i], 0, tmpsize);
102 for (i = 0, tmpcount = count; i < npages; i++, tmpcount -= tmpsize) {
103 tmpsize = tmpcount > PAGE_SIZE ? PAGE_SIZE : tmpcount;
104 CDEBUG(D_EXT2, "reading %u@%llu from dir %lu (size %llu)\n",
105 tmpsize, offset, file->f_dentry->d_inode->i_ino,
106 file->f_dentry->d_inode->i_size);
108 rc = fsfilt_readpage(req->rq_export->exp_obd, file,
109 kmap(pages[i]), tmpsize, &offset);
113 GOTO(cleanup_buf, rc = -EIO);
116 LASSERT(desc->bd_nob == count);
118 rc = ptlrpc_start_bulk_transfer(desc);
120 GOTO(cleanup_buf, rc);
122 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
123 CERROR("obd_fail_loc=%x, fail operation rc=%d\n",
124 OBD_FAIL_MDS_SENDPAGE, rc);
125 GOTO(abort_bulk, rc);
128 lwi = LWI_TIMEOUT(obd_timeout * HZ / 4, NULL, NULL);
129 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc), &lwi);
130 LASSERT (rc == 0 || rc == -ETIMEDOUT);
133 if (desc->bd_success &&
134 desc->bd_nob_transferred == count)
135 GOTO(cleanup_buf, rc);
137 rc = -ETIMEDOUT; /* XXX should this be a different errno? */
140 DEBUG_REQ(D_ERROR, req, "bulk failed: %s %d(%d), evicting %s@%s\n",
141 (rc == -ETIMEDOUT) ? "timeout" : "network error",
142 desc->bd_nob_transferred, count,
143 req->rq_export->exp_client_uuid.uuid,
144 req->rq_export->exp_connection->c_remote_uuid.uuid);
146 ptlrpc_fail_export(req->rq_export);
150 ptlrpc_abort_bulk (desc);
152 for (i = 0; i < npages; i++)
154 __free_pages(pages[i], 0);
156 ptlrpc_free_bulk(desc);
158 OBD_FREE(pages, sizeof(*pages) * npages);
163 int mds_lock_mode_for_dir(struct obd_device *obd,
164 struct dentry *dentry, int mode)
168 /* any dir access needs couple locks:
169 * 1) on part of dir we gonna lookup/modify in
170 * 2) on a whole dir to protect it from concurrent splitting
171 * and to flush client's cache for readdir()
172 * so, for a given mode and dentry this routine decides what
173 * lock mode to use for lock #2:
174 * 1) if caller's gonna lookup in dir then we need to protect
175 * dir from being splitted only - LCK_CR
176 * 2) if caller's gonna modify dir then we need to protect
177 * dir from being splitted and to flush cache - LCK_CW
178 * 3) if caller's gonna modify dir and that dir seems ready
179 * for splitting then we need to protect it from any
180 * type of access (lookup/modify/split) - LCK_EX -bzzz */
182 split = mds_splitting_expected(obd, dentry);
183 if (split == MDS_NO_SPLITTABLE || MDS_NO_SPLIT_EXPECTED) {
184 /* this inode won't be splitted. so we need not to protect from
185 * just flush client's cache on modification */
190 if (mode == LCK_PR) {
192 } else if (mode == LCK_PW) {
193 /* caller gonna modify directory.we use concurrent
194 write lock here to retract client's cache for readdir */
196 if (split == MDS_EXPECT_SPLIT) {
197 /* splitting possible. serialize any access
198 * the idea is that first one seen dir is
199 * splittable is given exclusive lock and
200 * split directory. caller passes lock mode
201 * to mds_try_to_split_dir() and splitting
202 * would be done with exclusive lock only -bzzz */
203 CDEBUG(D_OTHER, "%s: gonna split %u/%u\n",
205 (unsigned) dentry->d_inode->i_ino,
206 (unsigned) dentry->d_inode->i_generation);
210 CWARN("unexpected lock mode %d\n", mode);
217 /* only valid locked dentries or errors should be returned */
218 struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
219 struct vfsmount **mnt, int lock_mode,
220 struct lustre_handle *lockh, int *mode,
221 char *name, int namelen, __u64 lockpart)
223 struct mds_obd *mds = &obd->u.mds;
224 struct dentry *de = mds_fid2dentry(mds, fid, mnt), *retval = de;
225 struct ldlm_res_id res_id = { .name = {0} };
227 ldlm_policy_data_t policy = { .l_inodebits = { lockpart } };
234 res_id.name[0] = de->d_inode->i_ino;
235 res_id.name[1] = de->d_inode->i_generation;
238 if (name && IS_PDIROPS(de->d_inode)) {
239 ldlm_policy_data_t cpolicy =
240 { .l_inodebits = { MDS_INODELOCK_UPDATE } };
241 LASSERT(mode != NULL);
242 *mode = mds_lock_mode_for_dir(obd, de, lock_mode);
244 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
246 &cpolicy, *mode, &flags,
248 ldlm_completion_ast, NULL, NULL,
249 NULL, 0, NULL, lockh + 1);
250 if (rc != ELDLM_OK) {
252 RETURN(ERR_PTR(-ENOLCK));
257 res_id.name[2] = full_name_hash(name, namelen);
259 CDEBUG(D_INFO, "take lock on %lu:%u:"LPX64"\n",
260 de->d_inode->i_ino, de->d_inode->i_generation,
264 #warning "No PDIROPS support in the kernel"
266 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, res_id,
267 LDLM_IBITS, &policy, lock_mode, &flags,
268 mds_blocking_ast, ldlm_completion_ast, NULL, NULL,
269 NULL, 0, NULL, lockh);
270 if (rc != ELDLM_OK) {
272 retval = ERR_PTR(-EIO); /* XXX translate ldlm code */
275 ldlm_lock_decref(lockh + 1, LCK_CW);
282 #ifndef DCACHE_DISCONNECTED
283 #define DCACHE_DISCONNECTED DCACHE_NFSD_DISCONNECTED
287 /* Look up an entry by inode number. */
288 /* this function ONLY returns valid dget'd dentries with an initialized inode
290 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
291 struct vfsmount **mnt)
294 unsigned long ino = fid->id;
295 __u32 generation = fid->generation;
297 struct dentry *result;
300 RETURN(ERR_PTR(-ESTALE));
302 snprintf(fid_name, sizeof(fid_name), "0x%lx", ino);
304 CDEBUG(D_DENTRY, "--> mds_fid2dentry: ino/gen %lu/%u, sb %p\n",
305 ino, generation, mds->mds_sb);
307 /* under ext3 this is neither supposed to return bad inodes
309 result = ll_lookup_one_len(fid_name, mds->mds_fid_de, strlen(fid_name));
313 inode = result->d_inode;
315 RETURN(ERR_PTR(-ENOENT));
317 /* here we disabled generation check, as root inode i_generation
318 * of cache mds and real mds are different. */
319 if (inode->i_ino != mds->mds_rootfid.id && generation &&
320 inode->i_generation != generation) {
321 /* we didn't find the right inode.. */
322 CERROR("bad inode %lu, link: %lu ct: %d or generation %u/%u\n",
323 inode->i_ino, (unsigned long)inode->i_nlink,
324 atomic_read(&inode->i_count), inode->i_generation,
327 RETURN(ERR_PTR(-ENOENT));
331 *mnt = mds->mds_vfsmnt;
339 /* Establish a connection to the MDS.
341 * This will set up an export structure for the client to hold state data
342 * about that client, like open files, the last operation number it did
343 * on the server, etc.
345 static int mds_connect(struct lustre_handle *conn, struct obd_device *obd,
346 struct obd_uuid *cluuid, unsigned long connect_flags)
348 struct obd_export *exp;
349 struct mds_export_data *med; /* */
350 struct mds_client_data *mcd;
354 if (!conn || !obd || !cluuid)
357 /* XXX There is a small race between checking the list and adding a
358 * new connection for the same UUID, but the real threat (list
359 * corruption when multiple different clients connect) is solved.
361 * There is a second race between adding the export to the list,
362 * and filling in the client data below. Hence skipping the case
363 * of NULL mcd above. We should already be controlling multiple
364 * connects at the client, and we can't hold the spinlock over
365 * memory allocations without risk of deadlocking.
367 rc = class_connect(conn, obd, cluuid);
370 exp = class_conn2export(conn);
372 med = &exp->exp_mds_data;
374 OBD_ALLOC(mcd, sizeof(*mcd));
376 CERROR("mds: out of memory for client data\n");
377 GOTO(out, rc = -ENOMEM);
380 memcpy(mcd->mcd_uuid, cluuid, sizeof(mcd->mcd_uuid));
383 rc = mds_client_add(obd, &obd->u.mds, med, -1);
387 if (!(connect_flags & OBD_OPT_MDS_CONNECTION)) {
388 struct mds_obd *mds = &obd->u.mds;
389 if (!(exp->exp_flags & OBD_OPT_REAL_CLIENT)) {
390 atomic_inc(&mds->mds_real_clients);
391 CDEBUG(D_OTHER,"%s: peer from %s is real client (%d)\n",
392 obd->obd_name, exp->exp_client_uuid.uuid,
393 atomic_read(&mds->mds_real_clients));
394 exp->exp_flags |= OBD_OPT_REAL_CLIENT;
396 if (mds->mds_lmv_name)
397 rc = mds_lmv_connect(obd, mds->mds_lmv_name);
402 OBD_FREE(mcd, sizeof(*mcd));
403 class_disconnect(exp, 0);
405 class_export_put(exp);
410 static int mds_init_export(struct obd_export *exp)
412 struct mds_export_data *med = &exp->exp_mds_data;
414 INIT_LIST_HEAD(&med->med_open_head);
415 spin_lock_init(&med->med_open_lock);
419 static int mds_destroy_export(struct obd_export *export)
421 struct mds_export_data *med;
422 struct obd_device *obd = export->exp_obd;
423 struct lvfs_run_ctxt saved;
427 med = &export->exp_mds_data;
428 target_destroy_export(export);
430 if (obd_uuid_equals(&export->exp_client_uuid, &obd->obd_uuid))
433 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
435 /* Close any open files (which may also cause orphan unlinking). */
436 spin_lock(&med->med_open_lock);
437 while (!list_empty(&med->med_open_head)) {
438 struct list_head *tmp = med->med_open_head.next;
439 struct mds_file_data *mfd =
440 list_entry(tmp, struct mds_file_data, mfd_list);
441 BDEVNAME_DECLARE_STORAGE(btmp);
443 /* bug 1579: fix force-closing for 2.5 */
444 struct dentry *dentry = mfd->mfd_dentry;
446 list_del(&mfd->mfd_list);
447 spin_unlock(&med->med_open_lock);
449 /* If you change this message, be sure to update
450 * replay_single:test_46 */
451 CERROR("force closing client file handle for %*s (%s:%lu)\n",
452 dentry->d_name.len, dentry->d_name.name,
453 ll_bdevname(dentry->d_inode->i_sb, btmp),
454 dentry->d_inode->i_ino);
455 rc = mds_mfd_close(NULL, obd, mfd,
456 !(export->exp_flags & OBD_OPT_FAILOVER));
459 CDEBUG(D_INODE, "Error closing file: %d\n", rc);
460 spin_lock(&med->med_open_lock);
462 spin_unlock(&med->med_open_lock);
463 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
466 mds_client_free(export, !(export->exp_flags & OBD_OPT_FAILOVER));
471 static int mds_disconnect(struct obd_export *exp, int flags)
473 struct obd_device *obd;
475 unsigned long irqflags;
480 class_export_get(exp);
482 obd = class_exp2obd(exp);
484 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
485 exp->exp_handle.h_cookie);
490 if (!(exp->exp_flags & OBD_OPT_REAL_CLIENT)
491 && !atomic_read(&mds->mds_real_clients)) {
492 /* there was no client at all */
493 mds_lmv_disconnect(obd, flags);
496 if ((exp->exp_flags & OBD_OPT_REAL_CLIENT)
497 && atomic_dec_and_test(&mds->mds_real_clients)) {
498 /* time to drop LMV connections */
499 CDEBUG(D_OTHER, "%s: last real client %s disconnected. "
500 "Disconnnect from LMV now\n",
501 obd->obd_name, exp->exp_client_uuid.uuid);
502 mds_lmv_disconnect(obd, flags);
505 spin_lock_irqsave(&exp->exp_lock, irqflags);
506 exp->exp_flags = flags;
507 spin_unlock_irqrestore(&exp->exp_lock, irqflags);
509 /* Disconnect early so that clients can't keep using export */
510 rc = class_disconnect(exp, flags);
511 ldlm_cancel_locks_for_export(exp);
513 /* complete all outstanding replies */
514 spin_lock_irqsave(&exp->exp_lock, irqflags);
515 while (!list_empty(&exp->exp_outstanding_replies)) {
516 struct ptlrpc_reply_state *rs =
517 list_entry(exp->exp_outstanding_replies.next,
518 struct ptlrpc_reply_state, rs_exp_list);
519 struct ptlrpc_service *svc = rs->rs_srv_ni->sni_service;
521 spin_lock(&svc->srv_lock);
522 list_del_init(&rs->rs_exp_list);
523 ptlrpc_schedule_difficult_reply(rs);
524 spin_unlock(&svc->srv_lock);
526 spin_unlock_irqrestore(&exp->exp_lock, irqflags);
528 class_export_put(exp);
532 static int mds_getstatus(struct ptlrpc_request *req)
534 struct mds_obd *mds = mds_req2mds(req);
535 struct mds_body *body;
536 int rc, size = sizeof(*body);
539 rc = lustre_pack_reply(req, 1, &size, NULL);
540 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_GETSTATUS_PACK)) {
541 CERROR("mds: out of memory for message: size=%d\n", size);
542 req->rq_status = -ENOMEM; /* superfluous? */
546 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
547 memcpy(&body->fid1, &mds->mds_rootfid, sizeof(body->fid1));
549 /* the last_committed and last_xid fields are filled in for all
550 * replies already - no need to do so here also.
555 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
556 void *data, int flag)
561 if (flag == LDLM_CB_CANCELING) {
562 /* Don't need to do anything here. */
566 /* XXX layering violation! -phil */
567 l_lock(&lock->l_resource->lr_namespace->ns_lock);
568 /* Get this: if mds_blocking_ast is racing with mds_intent_policy,
569 * such that mds_blocking_ast is called just before l_i_p takes the
570 * ns_lock, then by the time we get the lock, we might not be the
571 * correct blocking function anymore. So check, and return early, if
573 if (lock->l_blocking_ast != mds_blocking_ast) {
574 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
578 lock->l_flags |= LDLM_FL_CBPENDING;
579 do_ast = (!lock->l_readers && !lock->l_writers);
580 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
583 struct lustre_handle lockh;
586 LDLM_DEBUG(lock, "already unused, calling ldlm_cli_cancel");
587 ldlm_lock2handle(lock, &lockh);
588 rc = ldlm_cli_cancel(&lockh);
590 CERROR("ldlm_cli_cancel: %d\n", rc);
592 LDLM_DEBUG(lock, "Lock still has references, will be "
598 int mds_get_md(struct obd_device *obd, struct inode *inode, void *md,
606 rc = fsfilt_get_md(obd, inode, md, *size);
611 CERROR("Error %d reading eadata for ino %lu\n",
616 if (S_ISREG(inode->i_mode))
617 rc = mds_convert_lov_ea(obd, inode, md, lmm_size);
618 if (S_ISDIR(inode->i_mode))
619 rc = mds_convert_mea_ea(obd, inode, md, lmm_size);
633 /* Call with lock=1 if you want mds_pack_md to take the i_sem.
634 * Call with lock=0 if the caller has already taken the i_sem. */
635 int mds_pack_md(struct obd_device *obd, struct lustre_msg *msg, int offset,
636 struct mds_body *body, struct inode *inode, int lock)
638 struct mds_obd *mds = &obd->u.mds;
644 lmm = lustre_msg_buf(msg, offset, 0);
646 /* Some problem with getting eadata when I sized the reply
648 CDEBUG(D_INFO, "no space reserved for inode %lu MD\n",
652 lmm_size = msg->buflens[offset];
654 /* I don't really like this, but it is a sanity check on the client
655 * MD request. However, if the client doesn't know how much space
656 * to reserve for the MD, it shouldn't be bad to have too much space.
658 if (lmm_size > mds->mds_max_mdsize) {
659 CWARN("Reading MD for inode %lu of %d bytes > max %d\n",
660 inode->i_ino, lmm_size, mds->mds_max_mdsize);
664 rc = mds_get_md(obd, inode, lmm, &lmm_size, lock);
666 if (S_ISDIR(inode->i_mode))
667 body->valid |= OBD_MD_FLDIREA;
669 body->valid |= OBD_MD_FLEASIZE;
670 body->eadatasize = lmm_size;
677 static int mds_getattr_internal(struct obd_device *obd, struct dentry *dentry,
678 struct ptlrpc_request *req,
679 struct mds_body *reqbody, int reply_off)
681 struct mds_body *body;
682 struct inode *inode = dentry->d_inode;
686 if (inode == NULL && !(dentry->d_flags & DCACHE_CROSS_REF))
689 body = lustre_msg_buf(req->rq_repmsg, reply_off, sizeof(*body));
690 LASSERT(body != NULL); /* caller prepped reply */
692 if (dentry->d_flags & DCACHE_CROSS_REF) {
693 CDEBUG(D_OTHER, "cross reference: %lu/%lu/%lu\n",
694 (unsigned long) dentry->d_mdsnum,
695 (unsigned long) dentry->d_inum,
696 (unsigned long) dentry->d_generation);
697 body->valid |= OBD_MD_FLID | OBD_MD_MDS;
698 body->fid1.id = dentry->d_inum;
699 body->fid1.mds = dentry->d_mdsnum;
700 body->fid1.generation = dentry->d_generation;
703 mds_pack_inode2fid(obd, &body->fid1, inode);
704 mds_pack_inode2body(obd, body, inode);
706 if ((S_ISREG(inode->i_mode) && (reqbody->valid & OBD_MD_FLEASIZE)) ||
707 (S_ISDIR(inode->i_mode) && (reqbody->valid & OBD_MD_FLDIREA))) {
708 rc = mds_pack_md(obd, req->rq_repmsg, reply_off + 1, body,
711 /* If we have LOV EA data, the OST holds size, atime, mtime */
712 if (!(body->valid & OBD_MD_FLEASIZE) &&
713 !(body->valid & OBD_MD_FLDIREA))
714 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
715 OBD_MD_FLATIME | OBD_MD_FLMTIME);
716 } else if (S_ISLNK(inode->i_mode) &&
717 (reqbody->valid & OBD_MD_LINKNAME) != 0) {
718 char *symname = lustre_msg_buf(req->rq_repmsg, reply_off + 1,0);
721 LASSERT (symname != NULL); /* caller prepped reply */
722 len = req->rq_repmsg->buflens[reply_off + 1];
724 rc = inode->i_op->readlink(dentry, symname, len);
726 CERROR("readlink failed: %d\n", rc);
727 } else if (rc != len - 1) {
728 CERROR ("Unexpected readlink rc %d: expecting %d\n",
732 CDEBUG(D_INODE, "read symlink dest %s\n", symname);
733 body->valid |= OBD_MD_LINKNAME;
734 body->eadatasize = rc + 1;
735 symname[rc] = 0; /* NULL terminate */
743 static int mds_getattr_pack_msg_cf(struct ptlrpc_request *req,
744 struct dentry *dentry,
747 int rc = 0, size[1] = {sizeof(struct mds_body)};
750 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
751 CERROR("failed MDS_GETATTR_PACK test\n");
752 req->rq_status = -ENOMEM;
753 GOTO(out, rc = -ENOMEM);
756 rc = lustre_pack_reply(req, 1, size, NULL);
758 CERROR("out of memory\n");
759 GOTO(out, req->rq_status = rc);
767 static int mds_getattr_pack_msg(struct ptlrpc_request *req, struct inode *inode,
770 struct mds_obd *mds = mds_req2mds(req);
771 struct mds_body *body;
772 int rc = 0, size[2] = {sizeof(*body)}, bufcount = 1;
775 body = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*body));
776 LASSERT(body != NULL); /* checked by caller */
777 LASSERT_REQSWABBED(req, offset); /* swabbed by caller */
779 if ((S_ISREG(inode->i_mode) && (body->valid & OBD_MD_FLEASIZE)) ||
780 (S_ISDIR(inode->i_mode) && (body->valid & OBD_MD_FLDIREA))) {
783 rc = fsfilt_get_md(req->rq_export->exp_obd, inode, NULL, 0);
785 CDEBUG(D_INODE, "got %d bytes MD data for inode %lu\n",
789 CERROR("error getting inode %lu MD: rc = %d\n",
792 } else if (rc > mds->mds_max_mdsize) {
794 CERROR("MD size %d larger than maximum possible %u\n",
795 rc, mds->mds_max_mdsize);
800 } else if (S_ISLNK(inode->i_mode) && (body->valid & OBD_MD_LINKNAME)) {
801 if (inode->i_size + 1 != body->eadatasize)
802 CERROR("symlink size: %Lu, reply space: %d\n",
803 inode->i_size + 1, body->eadatasize);
804 size[bufcount] = min_t(int, inode->i_size+1, body->eadatasize);
806 CDEBUG(D_INODE, "symlink size: %Lu, reply space: %d\n",
807 inode->i_size + 1, body->eadatasize);
810 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
811 CERROR("failed MDS_GETATTR_PACK test\n");
812 req->rq_status = -ENOMEM;
813 GOTO(out, rc = -ENOMEM);
816 rc = lustre_pack_reply(req, bufcount, size, NULL);
818 CERROR("out of memory\n");
819 GOTO(out, req->rq_status = rc);
827 int mds_check_mds_num(struct obd_device *obd, struct inode* inode,
828 char *name, int namelen)
830 struct mea *mea = NULL;
831 int mea_size, rc = 0;
834 rc = mds_get_lmv_attr(obd, inode, &mea, &mea_size);
838 /* dir is already splitted, check if requested filename
839 * should live at this MDS or at another one */
841 i = mea_name2idx(mea, name, namelen - 1);
842 if (mea->mea_master != mea->mea_fids[i].mds) {
844 "inapropriate MDS(%d) for %s. should be %d(%d)\n",
845 mea->mea_master, name, mea->mea_fids[i].mds, i);
851 OBD_FREE(mea, mea_size);
855 static int mds_getattr_name(int offset, struct ptlrpc_request *req,
856 struct lustre_handle *child_lockh, int child_part)
858 struct obd_device *obd = req->rq_export->exp_obd;
859 struct ldlm_reply *rep = NULL;
860 struct lvfs_run_ctxt saved;
861 struct mds_body *body;
862 struct dentry *dparent = NULL, *dchild = NULL;
863 struct lvfs_ucred uc;
864 struct lustre_handle parent_lockh[2];
865 int namesize, update_mode;
866 int rc = 0, cleanup_phase = 0, resent_req = 0;
867 struct clonefs_info *clone_info = NULL;
871 LASSERT(!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME));
873 MDS_UPDATE_COUNTER((&obd->u.mds), MDS_GETATTR_NAME_COUNT);
875 /* Swab now, before anyone looks inside the request */
876 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
877 lustre_swab_mds_body);
879 CERROR("Can't swab mds_body\n");
880 GOTO(cleanup, rc = -EFAULT);
883 LASSERT_REQSWAB(req, offset + 1);
884 name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
886 CERROR("Can't unpack name\n");
887 GOTO(cleanup, rc = -EFAULT);
889 namesize = req->rq_reqmsg->buflens[offset + 1];
891 LASSERT (offset == 0 || offset == 2);
892 /* if requests were at offset 2, the getattr reply goes back at 1 */
894 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
898 uc.luc_fsuid = body->fsuid;
899 uc.luc_fsgid = body->fsgid;
900 uc.luc_cap = body->capability;
901 uc.luc_suppgid1 = body->suppgid;
902 uc.luc_suppgid2 = -1;
903 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
904 cleanup_phase = 1; /* kernel context */
905 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
907 LASSERT(namesize > 0);
909 /* we have no dentry here, drop LOOKUP bit */
910 child_part &= ~MDS_INODELOCK_LOOKUP;
911 CDEBUG(D_OTHER, "%s: request to retrieve attrs for %lu/%lu\n",
912 obd->obd_name, (unsigned long) body->fid1.id,
913 (unsigned long) body->fid1.generation);
914 dchild = mds_fid2locked_dentry(obd, &body->fid1, NULL, LCK_PR,
915 parent_lockh, &update_mode,
916 NULL, 0, child_part);
917 if (IS_ERR(dchild)) {
918 CERROR("can't find inode: %d\n", (int) PTR_ERR(dchild));
919 GOTO(cleanup, rc = PTR_ERR(dchild));
921 memcpy(child_lockh, parent_lockh, sizeof(parent_lockh[0]));
923 if (parent_lockh[1].cookie)
924 ldlm_lock_decref(parent_lockh + 1, update_mode);
931 /* FIXME: handle raw lookup */
932 if (body->valid == OBD_MD_FLID) {
933 struct mds_obd *mds = &obd->u.mds;
934 struct mds_body *mds_reply;
935 int size = sizeof(*mds_reply);
938 dparent = mds_fid2dentry(mds, &body->fid1, NULL);
939 if (IS_ERR(dparent)) {
940 rc = PTR_ERR(dparent);
943 // The user requested ONLY the inode number, so do a raw lookup
944 rc = lustre_pack_reply(req, 1, &size, NULL);
946 CERROR("out of memory\n");
950 dir = dparent->d_inode;
951 LASSERT(dir->i_op->lookup_raw != NULL);
952 rc = dir->i_op->lookup_raw(dir, name, namesize - 1, &inum);
954 mds_reply = lustre_msg_buf(req->rq_repmsg, offset,
956 mds_reply->fid1.id = inum;
957 mds_reply->valid = OBD_MD_FLID;
962 if (child_lockh->cookie != 0) {
963 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT);
967 if (resent_req == 0) {
968 rc = mds_get_parent_child_locked(obd, &obd->u.mds, &body->fid1,
969 parent_lockh, &dparent,
970 LCK_PR, MDS_INODELOCK_LOOKUP,
971 &update_mode, name, namesize,
972 child_lockh, &dchild, LCK_PR,
973 child_part, clone_info);
977 /* let's make sure this name should leave on this mds node */
978 rc = mds_check_mds_num(obd, dparent->d_inode, name, namesize);
982 struct ldlm_lock *granted_lock;
983 struct ll_fid child_fid;
984 struct ldlm_resource *res;
985 DEBUG_REQ(D_DLMTRACE, req, "resent, not enqueuing new locks");
986 granted_lock = ldlm_handle2lock(child_lockh);
987 LASSERT(granted_lock);
989 res = granted_lock->l_resource;
990 child_fid.id = res->lr_name.name[0];
991 child_fid.generation = res->lr_name.name[1];
992 dchild = mds_fid2dentry(&obd->u.mds, &child_fid, NULL);
994 LDLM_LOCK_PUT(granted_lock);
997 cleanup_phase = 2; /* dchild, dparent, locks */
1001 if (!DENTRY_VALID(dchild)) {
1002 intent_set_disposition(rep, DISP_LOOKUP_NEG);
1003 /* in the intent case, the policy clears this error:
1004 the disposition is enough */
1008 intent_set_disposition(rep, DISP_LOOKUP_POS);
1011 if (req->rq_repmsg == NULL) {
1012 if (dchild->d_flags & DCACHE_CROSS_REF)
1013 rc = mds_getattr_pack_msg_cf(req, dchild, offset);
1015 rc = mds_getattr_pack_msg(req, dchild->d_inode, offset);
1017 CERROR ("mds_getattr_pack_msg: %d\n", rc);
1022 rc = mds_getattr_internal(obd, dchild, req, body, offset);
1023 GOTO(cleanup, rc); /* returns the lock to the client */
1026 switch (cleanup_phase) {
1028 if (resent_req == 0) {
1029 if (rc && DENTRY_VALID(dchild))
1030 ldlm_lock_decref(child_lockh, LCK_PR);
1032 ldlm_lock_decref(parent_lockh, LCK_PR);
1034 if (parent_lockh[1].cookie != 0)
1035 ldlm_lock_decref(parent_lockh + 1,
1044 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1050 static int mds_getattr(int offset, struct ptlrpc_request *req)
1052 struct mds_obd *mds = mds_req2mds(req);
1053 struct obd_device *obd = req->rq_export->exp_obd;
1054 struct lvfs_run_ctxt saved;
1056 struct mds_body *body;
1057 struct lvfs_ucred uc;
1061 body = lustre_swab_reqbuf (req, offset, sizeof (*body),
1062 lustre_swab_mds_body);
1064 CERROR ("Can't unpack body\n");
1068 MDS_UPDATE_COUNTER(mds, MDS_GETATTR_COUNT);
1070 uc.luc_fsuid = body->fsuid;
1071 uc.luc_fsgid = body->fsgid;
1072 uc.luc_cap = body->capability;
1073 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1074 de = mds_fid2dentry(mds, &body->fid1, NULL);
1076 rc = req->rq_status = -ENOENT;
1077 GOTO(out_pop, PTR_ERR(de));
1080 rc = mds_getattr_pack_msg(req, de->d_inode, offset);
1082 CERROR ("mds_getattr_pack_msg: %d\n", rc);
1086 req->rq_status = mds_getattr_internal(obd, de, req, body, 0);
1091 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1096 static int mds_obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1097 unsigned long max_age)
1101 spin_lock(&obd->obd_osfs_lock);
1102 rc = fsfilt_statfs(obd, obd->u.mds.mds_sb, max_age);
1104 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1105 spin_unlock(&obd->obd_osfs_lock);
1110 static int mds_statfs(struct ptlrpc_request *req)
1112 struct obd_device *obd = req->rq_export->exp_obd;
1113 int rc, size = sizeof(struct obd_statfs);
1116 rc = lustre_pack_reply(req, 1, &size, NULL);
1117 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK)) {
1118 CERROR("mds: statfs lustre_pack_reply failed: rc = %d\n", rc);
1122 MDS_UPDATE_COUNTER((&obd->u.mds), MDS_STATFS_COUNT);
1124 /* We call this so that we can cache a bit - 1 jiffie worth */
1125 rc = mds_obd_statfs(obd, lustre_msg_buf(req->rq_repmsg, 0, size),
1128 CERROR("mds_obd_statfs failed: rc %d\n", rc);
1134 req->rq_status = rc;
1138 static int mds_sync(struct ptlrpc_request *req)
1140 struct obd_device *obd = req->rq_export->exp_obd;
1141 struct mds_obd *mds = &obd->u.mds;
1142 struct mds_body *body;
1143 int rc, size = sizeof(*body);
1146 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
1148 GOTO(out, rc = -EPROTO);
1150 rc = lustre_pack_reply(req, 1, &size, NULL);
1151 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK)) {
1152 CERROR("fsync lustre_pack_reply failed: rc = %d\n", rc);
1156 if (body->fid1.id == 0) {
1157 /* a fid of zero is taken to mean "sync whole filesystem" */
1158 rc = fsfilt_sync(obd, mds->mds_sb);
1162 /* just any file to grab fsync method - "file" arg unused */
1163 struct file *file = mds->mds_rcvd_filp;
1166 de = mds_fid2dentry(mds, &body->fid1, NULL);
1168 GOTO(out, rc = PTR_ERR(de));
1170 rc = file->f_op->fsync(NULL, de, 1);
1175 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
1176 mds_pack_inode2fid(obd, &body->fid1, de->d_inode);
1177 mds_pack_inode2body(obd, body, de->d_inode);
1180 req->rq_status = rc;
1184 /* mds_readpage does not take a DLM lock on the inode, because the client must
1185 * already have a PR lock.
1187 * If we were to take another one here, a deadlock will result, if another
1188 * thread is already waiting for a PW lock. */
1189 static int mds_readpage(struct ptlrpc_request *req)
1191 struct obd_device *obd = req->rq_export->exp_obd;
1192 struct vfsmount *mnt;
1195 struct mds_body *body, *repbody;
1196 struct lvfs_run_ctxt saved;
1197 int rc, size = sizeof(*repbody);
1198 struct lvfs_ucred uc;
1201 rc = lustre_pack_reply(req, 1, &size, NULL);
1202 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK)) {
1203 CERROR("mds: out of memory\n");
1204 GOTO(out, rc = -ENOMEM);
1207 body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
1209 GOTO (out, rc = -EFAULT);
1211 uc.luc_fsuid = body->fsuid;
1212 uc.luc_fsgid = body->fsgid;
1213 uc.luc_cap = body->capability;
1214 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1215 de = mds_fid2dentry(&obd->u.mds, &body->fid1, &mnt);
1217 GOTO(out_pop, rc = PTR_ERR(de));
1219 CDEBUG(D_INODE, "ino %lu\n", de->d_inode->i_ino);
1221 file = dentry_open(de, mnt, O_RDONLY | O_LARGEFILE);
1222 /* note: in case of an error, dentry_open puts dentry */
1224 GOTO(out_pop, rc = PTR_ERR(file));
1226 /* body->size is actually the offset -eeb */
1227 if ((body->size & (de->d_inode->i_blksize - 1)) != 0) {
1228 CERROR("offset "LPU64" not on a block boundary of %lu\n",
1229 body->size, de->d_inode->i_blksize);
1230 GOTO(out_file, rc = -EFAULT);
1233 /* body->nlink is actually the #bytes to read -eeb */
1234 if (body->nlink & (de->d_inode->i_blksize - 1)) {
1235 CERROR("size %u is not multiple of blocksize %lu\n",
1236 body->nlink, de->d_inode->i_blksize);
1237 GOTO(out_file, rc = -EFAULT);
1240 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*repbody));
1241 repbody->size = file->f_dentry->d_inode->i_size;
1242 repbody->valid = OBD_MD_FLSIZE;
1244 /* to make this asynchronous make sure that the handling function
1245 doesn't send a reply when this function completes. Instead a
1246 callback function would send the reply */
1247 /* body->size is actually the offset -eeb */
1248 rc = mds_sendpage(req, file, body->size, body->nlink);
1251 filp_close(file, 0);
1253 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1255 req->rq_status = rc;
1259 int mds_reint(struct ptlrpc_request *req, int offset,
1260 struct lustre_handle *lockh)
1262 struct mds_update_record *rec; /* 116 bytes on the stack? no sir! */
1266 OBD_ALLOC(rec, sizeof(*rec));
1270 rc = mds_update_unpack(req, offset, rec);
1271 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNPACK)) {
1272 CERROR("invalid record\n");
1273 GOTO(out, req->rq_status = -EINVAL);
1275 /* rc will be used to interrupt a for loop over multiple records */
1276 rc = mds_reint_rec(rec, offset, req, lockh);
1278 OBD_FREE(rec, sizeof(*rec));
1282 static int mds_filter_recovery_request(struct ptlrpc_request *req,
1283 struct obd_device *obd, int *process)
1285 switch (req->rq_reqmsg->opc) {
1286 case MDS_CONNECT: /* This will never get here, but for completeness. */
1287 case OST_CONNECT: /* This will never get here, but for completeness. */
1288 case MDS_DISCONNECT:
1289 case OST_DISCONNECT:
1294 case MDS_SYNC: /* used in unmounting */
1299 *process = target_queue_recovery_request(req, obd);
1303 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
1305 /* XXX what should we set rq_status to here? */
1306 req->rq_status = -EAGAIN;
1307 RETURN(ptlrpc_error(req));
1311 static char *reint_names[] = {
1312 [REINT_SETATTR] "setattr",
1313 [REINT_CREATE] "create",
1314 [REINT_LINK] "link",
1315 [REINT_UNLINK] "unlink",
1316 [REINT_RENAME] "rename",
1317 [REINT_OPEN] "open",
1320 #define FILTER_VALID_FLAGS (OBD_MD_FLTYPE | OBD_MD_FLMODE | OBD_MD_FLGENER |\
1321 OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ|\
1322 OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME|\
1325 static void reconstruct_create(struct ptlrpc_request *req)
1327 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1328 struct mds_obd *mds = &req->rq_export->exp_obd->u.mds;
1329 struct mds_client_data *mcd = med->med_mcd;
1330 struct dentry *dentry;
1331 struct ost_body *body;
1335 /* copy rc, transno and disp; steal locks */
1336 mds_req_from_mcd(req, mcd);
1337 if (req->rq_status) {
1343 fid.id = mcd->mcd_last_data;
1346 LASSERT(fid.id != 0);
1348 dentry = mds_fid2dentry(mds, &fid, NULL);
1349 if (IS_ERR(dentry)) {
1350 CERROR("can't find inode "LPU64"\n", fid.id);
1351 req->rq_status = PTR_ERR(dentry);
1356 CWARN("reconstruct reply for x"LPU64" (remote ino) "LPU64" -> %lu/%u\n",
1357 req->rq_xid, fid.id, dentry->d_inode->i_ino,
1358 dentry->d_inode->i_generation);
1360 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
1361 obdo_from_inode(&body->oa, dentry->d_inode, FILTER_VALID_FLAGS);
1362 body->oa.o_id = dentry->d_inode->i_ino;
1363 body->oa.o_generation = dentry->d_inode->i_generation;
1364 body->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGENER;
1371 static int mdt_obj_create(struct ptlrpc_request *req)
1373 struct obd_device *obd = req->rq_export->exp_obd;
1374 struct mds_obd *mds = &obd->u.mds;
1375 struct ost_body *body, *repbody;
1376 char fidname[LL_FID_NAMELEN];
1377 struct inode *parent_inode;
1378 struct lvfs_run_ctxt saved;
1379 struct dentry *new = NULL;
1380 struct dentry_params dp;
1381 int mealen, flags = 0, rc, size = sizeof(*repbody), cleanup_phase = 0;
1382 struct lvfs_ucred uc;
1384 void *handle = NULL;
1385 unsigned long cr_inum = 0;
1388 DEBUG_REQ(D_HA, req, "create remote object");
1390 parent_inode = mds->mds_unnamed_dir->d_inode;
1392 body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
1396 rc = lustre_pack_reply(req, 1, &size, NULL);
1400 MDS_CHECK_RESENT(req, reconstruct_create(req));
1402 uc.luc_fsuid = body->oa.o_uid;
1403 uc.luc_fsgid = body->oa.o_gid;
1405 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1407 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
1409 if (body->oa.o_flags & OBD_FL_RECREATE_OBJS) {
1410 /* this is re-create request from MDS holding directory name.
1411 * we have to lookup given ino/generation first. if it exists
1412 * (good case) then there is nothing to do. if it does not
1413 * then we have to recreate it */
1415 fid.id = body->oa.o_id;
1416 fid.generation = body->oa.o_generation;
1417 new = mds_fid2dentry(mds, &fid, NULL);
1418 if (!IS_ERR(new) && new->d_inode) {
1419 CDEBUG(D_HA, "mkdir() repairing is on its way: %lu/%lu\n",
1420 (unsigned long) fid.id,
1421 (unsigned long) fid.generation);
1422 obdo_from_inode(&repbody->oa, new->d_inode,
1423 FILTER_VALID_FLAGS);
1424 repbody->oa.o_id = new->d_inode->i_ino;
1425 repbody->oa.o_generation = new->d_inode->i_generation;
1426 repbody->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGENER;
1428 cr_inum = new->d_inode->i_ino;
1429 GOTO(cleanup, rc = 0);
1431 CWARN("hmm. for some reason dir %lu/%lu (or reply) got lost\n",
1432 (unsigned long) fid.id, (unsigned long) fid.generation);
1433 LASSERT(new->d_inode == NULL ||
1434 new->d_inode->i_generation != fid.generation);
1438 down(&parent_inode->i_sem);
1439 handle = fsfilt_start(obd, parent_inode, FSFILT_OP_MKDIR, NULL);
1440 if (IS_ERR(handle)) {
1441 up(&parent_inode->i_sem);
1442 GOTO(cleanup, rc = PTR_ERR(handle));
1444 cleanup_phase = 1; /* transaction */
1447 rc = sprintf(fidname, "%u.%u", ll_insecure_random_int(), current->pid);
1448 new = lookup_one_len(fidname, mds->mds_unnamed_dir, rc);
1450 CERROR("%s: can't lookup new inode (%s) for mkdir: %d\n",
1451 obd->obd_name, fidname, (int) PTR_ERR(new));
1452 fsfilt_commit(obd, mds->mds_sb, new->d_inode, handle, 0);
1453 up(&parent_inode->i_sem);
1454 RETURN(PTR_ERR(new));
1455 } else if (new->d_inode) {
1456 CERROR("%s: name exists. repeat\n", obd->obd_name);
1460 new->d_fsdata = (void *) &dp;
1464 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1465 DEBUG_REQ(D_HA, req, "replay create obj %lu/%lu",
1466 (unsigned long) body->oa.o_id,
1467 (unsigned long) body->oa.o_generation);
1468 dp.p_inum = body->oa.o_id;
1469 dp.p_generation = body->oa.o_generation;
1471 rc = vfs_mkdir(parent_inode, new, body->oa.o_mode);
1473 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1474 LASSERTF(body->oa.o_id == new->d_inode->i_ino,
1475 "BUG 3550: failed to recreate obj "
1477 body->oa.o_id, new->d_inode->i_ino);
1478 LASSERTF(body->oa.o_generation ==
1479 new->d_inode->i_generation,
1480 "BUG 3550: failed to recreate obj/gen "
1481 LPU64"/%u -> %lu/%u\n",
1482 body->oa.o_id, body->oa.o_generation,
1483 new->d_inode->i_ino,
1484 new->d_inode->i_generation);
1487 obdo_from_inode(&repbody->oa, new->d_inode, FILTER_VALID_FLAGS);
1488 repbody->oa.o_id = new->d_inode->i_ino;
1489 repbody->oa.o_generation = new->d_inode->i_generation;
1490 repbody->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGENER;
1492 rc = fsfilt_del_dir_entry(obd, new);
1493 up(&parent_inode->i_sem);
1496 CERROR("can't remove name for object: %d\n", rc);
1500 cleanup_phase = 2; /* created directory object */
1502 cr_inum = new->d_inode->i_ino;
1503 CDEBUG(D_OTHER, "created dirobj: %lu/%u mode %o\n",
1504 new->d_inode->i_ino, new->d_inode->i_generation,
1505 new->d_inode->i_mode);
1507 up(&parent_inode->i_sem);
1508 CERROR("%s: can't create dirobj: %d\n", obd->obd_name, rc);
1512 if (body->oa.o_valid & OBD_MD_FLID) {
1513 /* this is new object for splitted dir. we have to
1514 * prevent recursive splitting on it -bzzz */
1515 mealen = obd_size_diskmd(mds->mds_lmv_exp, NULL);
1516 OBD_ALLOC(mea, mealen);
1518 GOTO(cleanup, rc = -ENOMEM);
1519 mea->mea_magic = MEA_MAGIC_ALL_CHARS;
1520 mea->mea_master = 0;
1522 down(&new->d_inode->i_sem);
1523 rc = fsfilt_set_md(obd, new->d_inode, handle, mea, mealen);
1524 up(&new->d_inode->i_sem);
1525 OBD_FREE(mea, mealen);
1526 CDEBUG(D_OTHER, "%s: mark non-splittable %lu/%u - %d\n",
1527 obd->obd_name, new->d_inode->i_ino,
1528 new->d_inode->i_generation, flags);
1529 } else if (body->oa.o_easize) {
1530 /* we pass LCK_EX to split routine to signal that we have
1531 * exclusive access to the directory. simple because nobody
1532 * knows it already exists -bzzz */
1533 mds_try_to_split_dir(obd, new, NULL, body->oa.o_easize, LCK_EX);
1537 switch (cleanup_phase) {
1538 case 2: /* object has been created, but we'll may want to replay it later */
1540 ptlrpc_require_repack(req);
1541 case 1: /* transaction */
1542 rc = mds_finish_transno(mds, parent_inode, handle, req, rc, cr_inum);
1546 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1550 static int mdt_get_info(struct ptlrpc_request *req)
1553 struct obd_export *exp = req->rq_export;
1554 int keylen, rc = 0, size = sizeof(obd_id);
1558 key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
1560 DEBUG_REQ(D_HA, req, "no get_info key");
1563 keylen = req->rq_reqmsg->buflens[0];
1565 if (keylen < strlen("mdsize") || memcmp(key, "mdsize", 6) != 0)
1568 rc = lustre_pack_reply(req, 1, &size, NULL);
1572 reply = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply));
1573 rc = obd_get_info(exp, keylen, key, &size, reply);
1574 req->rq_repmsg->status = 0;
1578 static int mds_set_info(struct obd_export *exp, __u32 keylen,
1579 void *key, __u32 vallen, void *val)
1581 struct obd_device *obd;
1582 struct mds_obd *mds;
1586 obd = class_exp2obd(exp);
1588 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1589 exp->exp_handle.h_cookie);
1593 #define KEY_IS(str) \
1594 (keylen == strlen(str) && memcmp(key, str, keylen) == 0)
1597 if (KEY_IS("mds_num")) {
1600 CDEBUG(D_IOCTL, "set mds num %d\n", *(int*)val);
1601 mds->mds_num = *(int*)val;
1602 group = FILTER_GROUP_FIRST_MDS + mds->mds_num;
1603 valsize = sizeof(group);
1604 /*mds number has been changed, so the corresponding obdfilter exp
1605 *need to be changed too*/
1606 rc = obd_set_info(mds->mds_osc_exp, strlen("mds_conn"), "mds_conn",
1610 CDEBUG(D_IOCTL, "invalid key\n");
1614 static int mdt_set_info(struct ptlrpc_request *req)
1617 struct obd_export *exp = req->rq_export;
1618 int keylen, rc = 0, vallen;
1621 key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
1623 DEBUG_REQ(D_HA, req, "no set_info key");
1626 keylen = req->rq_reqmsg->buflens[0];
1628 if (keylen == strlen("mds_num") &&
1629 memcmp(key, "mds_num", keylen) == 0) {
1630 rc = lustre_pack_reply(req, 0, NULL, NULL);
1633 val = lustre_msg_buf(req->rq_reqmsg, 1, 0);
1635 vallen = req->rq_reqmsg->buflens[1];
1637 rc = obd_set_info(exp, keylen, key, vallen, val);
1638 req->rq_repmsg->status = 0;
1640 } else if (keylen == strlen("client") &&
1641 memcmp(key, "client", keylen) == 0) {
1642 rc = lustre_pack_reply(req, 0, NULL, NULL);
1645 rc = obd_set_info(exp, keylen, key, sizeof(obd_id), NULL);
1646 req->rq_repmsg->status = 0;
1649 CDEBUG(D_IOCTL, "invalid key\n");
1653 int mds_handle(struct ptlrpc_request *req)
1655 int should_process, fail = OBD_FAIL_MDS_ALL_REPLY_NET;
1657 struct mds_obd *mds = NULL; /* quell gcc overwarning */
1658 struct obd_device *obd = NULL;
1661 OBD_FAIL_RETURN(OBD_FAIL_MDS_ALL_REQUEST_NET | OBD_FAIL_ONCE, 0);
1663 LASSERT(current->journal_info == NULL);
1664 /* XXX identical to OST */
1665 if (req->rq_reqmsg->opc != MDS_CONNECT) {
1666 struct mds_export_data *med;
1669 if (req->rq_export == NULL) {
1670 CERROR("lustre_mds: operation %d on unconnected MDS\n",
1671 req->rq_reqmsg->opc);
1672 req->rq_status = -ENOTCONN;
1673 GOTO(out, rc = -ENOTCONN);
1676 med = &req->rq_export->exp_mds_data;
1677 obd = req->rq_export->exp_obd;
1680 /* sanity check: if the xid matches, the request must
1681 * be marked as a resent or replayed */
1682 if (req->rq_xid == med->med_mcd->mcd_last_xid)
1683 LASSERTF(lustre_msg_get_flags(req->rq_reqmsg) &
1684 (MSG_RESENT | MSG_REPLAY),
1685 "rq_xid "LPU64" matches last_xid, "
1686 "expected RESENT flag\n",
1688 /* else: note the opposite is not always true; a
1689 * RESENT req after a failover will usually not match
1690 * the last_xid, since it was likely never
1691 * committed. A REPLAYed request will almost never
1692 * match the last xid, however it could for a
1693 * committed, but still retained, open. */
1695 spin_lock_bh(&obd->obd_processing_task_lock);
1696 recovering = obd->obd_recovering;
1697 spin_unlock_bh(&obd->obd_processing_task_lock);
1699 rc = mds_filter_recovery_request(req, obd,
1701 if (rc || should_process == 0) {
1703 } else if (should_process < 0) {
1704 req->rq_status = should_process;
1705 rc = ptlrpc_error(req);
1711 switch (req->rq_reqmsg->opc) {
1713 DEBUG_REQ(D_INODE, req, "connect");
1714 OBD_FAIL_RETURN(OBD_FAIL_MDS_CONNECT_NET, 0);
1715 rc = target_handle_connect(req);
1717 /* Now that we have an export, set mds. */
1718 mds = mds_req2mds(req);
1721 case MDS_DISCONNECT:
1722 DEBUG_REQ(D_INODE, req, "disconnect");
1723 OBD_FAIL_RETURN(OBD_FAIL_MDS_DISCONNECT_NET, 0);
1724 rc = target_handle_disconnect(req);
1725 req->rq_status = rc; /* superfluous? */
1729 DEBUG_REQ(D_INODE, req, "getstatus");
1730 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETSTATUS_NET, 0);
1731 rc = mds_getstatus(req);
1735 DEBUG_REQ(D_INODE, req, "getattr");
1736 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NET, 0);
1737 rc = mds_getattr(0, req);
1740 case MDS_GETATTR_NAME: {
1741 struct lustre_handle lockh;
1742 DEBUG_REQ(D_INODE, req, "getattr_name");
1743 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NAME_NET, 0);
1745 /* If this request gets a reconstructed reply, we won't be
1746 * acquiring any new locks in mds_getattr_name, so we don't
1750 rc = mds_getattr_name(0, req, &lockh, MDS_INODELOCK_UPDATE);
1751 /* this non-intent call (from an ioctl) is special */
1752 req->rq_status = rc;
1753 if (rc == 0 && lockh.cookie)
1754 ldlm_lock_decref(&lockh, LCK_PR);
1758 DEBUG_REQ(D_INODE, req, "statfs");
1759 OBD_FAIL_RETURN(OBD_FAIL_MDS_STATFS_NET, 0);
1760 rc = mds_statfs(req);
1764 DEBUG_REQ(D_INODE, req, "readpage");
1765 OBD_FAIL_RETURN(OBD_FAIL_MDS_READPAGE_NET, 0);
1766 rc = mds_readpage(req);
1768 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_SENDPAGE)) {
1769 if (req->rq_reply_state) {
1770 lustre_free_reply_state (req->rq_reply_state);
1771 req->rq_reply_state = NULL;
1779 __u32 *opcp = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*opcp));
1781 int size[3] = {sizeof(struct mds_body), mds->mds_max_mdsize,
1782 mds->mds_max_cookiesize};
1785 /* NB only peek inside req now; mds_reint() will swab it */
1787 CERROR ("Can't inspect opcode\n");
1792 if (lustre_msg_swabbed (req->rq_reqmsg))
1795 DEBUG_REQ(D_INODE, req, "reint %d (%s)", opc,
1796 (opc < sizeof(reint_names) / sizeof(reint_names[0]) ||
1797 reint_names[opc] == NULL) ? reint_names[opc] :
1800 OBD_FAIL_RETURN(OBD_FAIL_MDS_REINT_NET, 0);
1802 if (opc == REINT_UNLINK || opc == REINT_RENAME)
1804 else if (opc == REINT_OPEN)
1809 rc = lustre_pack_reply(req, bufcount, size, NULL);
1813 rc = mds_reint(req, 0, NULL);
1814 fail = OBD_FAIL_MDS_REINT_NET_REP;
1819 DEBUG_REQ(D_INODE, req, "close");
1820 OBD_FAIL_RETURN(OBD_FAIL_MDS_CLOSE_NET, 0);
1821 rc = mds_close(req);
1824 case MDS_DONE_WRITING:
1825 DEBUG_REQ(D_INODE, req, "done_writing");
1826 OBD_FAIL_RETURN(OBD_FAIL_MDS_DONE_WRITING_NET, 0);
1827 rc = mds_done_writing(req);
1831 DEBUG_REQ(D_INODE, req, "pin");
1832 OBD_FAIL_RETURN(OBD_FAIL_MDS_PIN_NET, 0);
1837 DEBUG_REQ(D_INODE, req, "sync");
1838 OBD_FAIL_RETURN(OBD_FAIL_MDS_SYNC_NET, 0);
1843 DEBUG_REQ(D_INODE, req, "ping");
1844 rc = target_handle_ping(req);
1847 case OBD_LOG_CANCEL:
1848 CDEBUG(D_INODE, "log cancel\n");
1849 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1850 rc = -ENOTSUPP; /* la la la */
1854 DEBUG_REQ(D_INODE, req, "enqueue");
1855 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1856 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1857 ldlm_server_blocking_ast, NULL);
1860 DEBUG_REQ(D_INODE, req, "convert");
1861 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1862 rc = ldlm_handle_convert(req);
1864 case LDLM_BL_CALLBACK:
1865 case LDLM_CP_CALLBACK:
1866 DEBUG_REQ(D_INODE, req, "callback");
1867 CERROR("callbacks should not happen on MDS\n");
1869 OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
1871 case LLOG_ORIGIN_HANDLE_OPEN:
1872 DEBUG_REQ(D_INODE, req, "llog_init");
1873 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1874 rc = llog_origin_handle_open(req);
1876 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1877 DEBUG_REQ(D_INODE, req, "llog next block");
1878 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1879 rc = llog_origin_handle_next_block(req);
1881 case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1882 DEBUG_REQ(D_INODE, req, "llog prev block");
1883 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1884 rc = llog_origin_handle_prev_block(req);
1886 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1887 DEBUG_REQ(D_INODE, req, "llog read header");
1888 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1889 rc = llog_origin_handle_read_header(req);
1891 case LLOG_ORIGIN_HANDLE_CLOSE:
1892 DEBUG_REQ(D_INODE, req, "llog close");
1893 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1894 rc = llog_origin_handle_close(req);
1897 DEBUG_REQ(D_INODE, req, "ost_create");
1898 rc = mdt_obj_create(req);
1901 DEBUG_REQ(D_INODE, req, "get_info");
1902 rc = mdt_get_info(req);
1905 DEBUG_REQ(D_INODE, req, "set_info");
1906 rc = mdt_set_info(req);
1909 CDEBUG(D_INODE, "write\n");
1910 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1911 rc = ost_brw_write(req, NULL);
1912 LASSERT(current->journal_info == NULL);
1913 /* mdt_brw sends its own replies */
1917 DEBUG_REQ(D_INODE, req, "llog catinfo");
1918 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1919 rc = llog_catinfo(req);
1922 req->rq_status = -ENOTSUPP;
1923 rc = ptlrpc_error(req);
1927 LASSERT(current->journal_info == NULL);
1931 /* If we're DISCONNECTing, the mds_export_data is already freed */
1932 if (!rc && req->rq_reqmsg->opc != MDS_DISCONNECT) {
1933 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1934 struct obd_device *obd = list_entry(mds, struct obd_device,
1936 req->rq_repmsg->last_xid =
1937 le64_to_cpu(med->med_mcd->mcd_last_xid);
1939 if (!obd->obd_no_transno) {
1940 req->rq_repmsg->last_committed =
1941 obd->obd_last_committed;
1943 DEBUG_REQ(D_IOCTL, req,
1944 "not sending last_committed update");
1946 CDEBUG(D_INFO, "last_transno "LPU64", last_committed "LPU64
1948 mds->mds_last_transno, obd->obd_last_committed,
1953 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) {
1954 if (obd && obd->obd_recovering) {
1955 DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply");
1956 return target_queue_final_reply(req, rc);
1958 /* Lost a race with recovery; let the error path DTRT. */
1959 rc = req->rq_status = -ENOTCONN;
1962 target_send_reply(req, rc, fail);
1966 /* Update the server data on disk. This stores the new mount_count and
1967 * also the last_rcvd value to disk. If we don't have a clean shutdown,
1968 * then the server last_rcvd value may be less than that of the clients.
1969 * This will alert us that we may need to do client recovery.
1971 * Also assumes for mds_last_transno that we are not modifying it (no locking).
1973 int mds_update_server_data(struct obd_device *obd, int force_sync)
1975 struct mds_obd *mds = &obd->u.mds;
1976 struct mds_server_data *msd = mds->mds_server_data;
1977 struct file *filp = mds->mds_rcvd_filp;
1978 struct lvfs_run_ctxt saved;
1983 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1984 msd->msd_last_transno = cpu_to_le64(mds->mds_last_transno);
1986 CDEBUG(D_SUPER, "MDS mount_count is "LPU64", last_transno is "LPU64"\n",
1987 mds->mds_mount_count, mds->mds_last_transno);
1988 rc = fsfilt_write_record(obd, filp, msd, sizeof(*msd), &off,force_sync);
1990 CERROR("error writing MDS server data: rc = %d\n", rc);
1991 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1996 /* mount the file system (secretly) */
1997 static int mds_setup(struct obd_device *obd, obd_count len, void *buf)
1999 struct lustre_cfg* lcfg = buf;
2000 struct mds_obd *mds = &obd->u.mds;
2001 char *options = NULL;
2002 struct vfsmount *mnt;
2007 dev_clear_rdonly(2);
2009 if (!lcfg->lcfg_inlbuf1 || !lcfg->lcfg_inlbuf2)
2010 RETURN(rc = -EINVAL);
2012 obd->obd_fsops = fsfilt_get_ops(lcfg->lcfg_inlbuf2);
2013 if (IS_ERR(obd->obd_fsops))
2014 RETURN(rc = PTR_ERR(obd->obd_fsops));
2016 mds->mds_max_mdsize = sizeof(struct lov_mds_md);
2018 page = __get_free_page(GFP_KERNEL);
2022 options = (char *)page;
2023 memset(options, 0, PAGE_SIZE);
2025 /* here we use "iopen_nopriv" hardcoded, because it affects MDS utility
2026 * and the rest of options are passed by mount options. Probably this
2027 * should be moved to somewhere else like startup scripts or lconf. */
2028 sprintf(options, "iopen_nopriv");
2030 if (lcfg->lcfg_inllen4 > 0 && lcfg->lcfg_inlbuf4)
2031 sprintf(options + strlen(options), ",%s",
2032 lcfg->lcfg_inlbuf4);
2034 /* we have to know mdsnum before touching underlying fs -bzzz */
2035 sema_init(&mds->mds_lmv_sem, 1);
2036 mds->mds_lmv_connected = 0;
2037 if (lcfg->lcfg_inllen5 > 0 && lcfg->lcfg_inlbuf5 &&
2038 strcmp(lcfg->lcfg_inlbuf5, "dumb")) {
2041 CDEBUG(D_OTHER, "MDS: %s is master for %s\n",
2042 obd->obd_name, lcfg->lcfg_inlbuf5);
2044 generate_random_uuid(uuid);
2045 class_uuid_unparse(uuid, &mds->mds_lmv_uuid);
2047 OBD_ALLOC(mds->mds_lmv_name, lcfg->lcfg_inllen5);
2048 if (mds->mds_lmv_name == NULL)
2049 RETURN(rc = -ENOMEM);
2051 memcpy(mds->mds_lmv_name, lcfg->lcfg_inlbuf5,
2052 lcfg->lcfg_inllen5);
2054 rc = mds_lmv_connect(obd, mds->mds_lmv_name);
2056 OBD_FREE(mds->mds_lmv_name, lcfg->lcfg_inllen5);
2061 /* FIXME-WANGDI: this should be reworked when we will use lmv along
2062 * with cobd, because correct mdsnum is set in mds_lmv_connect(). */
2063 if (lcfg->lcfg_inllen6 > 0 && lcfg->lcfg_inlbuf6 && !mds->mds_lmv_obd &&
2064 strcmp(lcfg->lcfg_inlbuf6, "dumb")) {
2065 if (!memcmp(lcfg->lcfg_inlbuf6, "master", strlen("master")) &&
2066 mds->mds_num == 0) {
2067 mds->mds_num = REAL_MDS_NUMBER;
2068 } else if (!memcmp(lcfg->lcfg_inlbuf6, "cache", strlen("cache")) &&
2069 mds->mds_num == 0) {
2070 mds->mds_num = CACHE_MDS_NUMBER;
2074 mnt = do_kern_mount(lcfg->lcfg_inlbuf2, 0,
2075 lcfg->lcfg_inlbuf1, options);
2081 CERROR("do_kern_mount failed: rc = %d\n", rc);
2085 CDEBUG(D_SUPER, "%s: mnt = %p\n", lcfg->lcfg_inlbuf1, mnt);
2087 sema_init(&mds->mds_orphan_recovery_sem, 1);
2088 sema_init(&mds->mds_epoch_sem, 1);
2089 spin_lock_init(&mds->mds_transno_lock);
2090 mds->mds_max_cookiesize = sizeof(struct llog_cookie);
2091 atomic_set(&mds->mds_real_clients, 0);
2093 obd->obd_namespace = ldlm_namespace_new(obd->obd_name,
2094 LDLM_NAMESPACE_SERVER);
2095 if (obd->obd_namespace == NULL) {
2096 mds_cleanup(obd, 0);
2097 GOTO(err_put, rc = -ENOMEM);
2099 ldlm_register_intent(obd->obd_namespace, mds_intent_policy);
2101 rc = mds_fs_setup(obd, mnt);
2103 CERROR("MDS filesystem method init failed: rc = %d\n", rc);
2107 rc = llog_start_commit_thread();
2111 /* this check for @dumb string is needed to handle mounting MDS with
2112 * smfs. Read lconf:MDSDEV.write_conf() for more details. */
2113 if (lcfg->lcfg_inllen3 > 0 && lcfg->lcfg_inlbuf3 &&
2114 strcmp(lcfg->lcfg_inlbuf3, "dumb")) {
2117 generate_random_uuid(uuid);
2118 class_uuid_unparse(uuid, &mds->mds_lov_uuid);
2120 OBD_ALLOC(mds->mds_profile, lcfg->lcfg_inllen3);
2121 if (mds->mds_profile == NULL)
2122 GOTO(err_fs, rc = -ENOMEM);
2124 memcpy(mds->mds_profile, lcfg->lcfg_inlbuf3,
2125 lcfg->lcfg_inllen3);
2128 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
2129 "mds_ldlm_client", &obd->obd_ldlm_client);
2130 obd->obd_replayable = 1;
2132 mds->mds_counters = lprocfs_alloc_mds_counters();
2134 rc = mds_postsetup(obd);
2141 /* No extra cleanup needed for llog_init_commit_thread() */
2142 mds_fs_cleanup(obd, 0);
2144 ldlm_namespace_free(obd->obd_namespace, 0);
2145 obd->obd_namespace = NULL;
2148 mntput(mds->mds_vfsmnt);
2152 fsfilt_put_ops(obd->obd_fsops);
2156 static int mds_postsetup(struct obd_device *obd)
2158 struct mds_obd *mds = &obd->u.mds;
2162 rc = obd_llog_setup(obd, &obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT,
2163 obd, 0, NULL, &llog_lvfs_ops);
2167 if (mds->mds_profile) {
2168 struct llog_ctxt *lgctxt;
2169 struct lvfs_run_ctxt saved;
2170 struct lustre_profile *lprof;
2171 struct config_llog_instance cfg;
2173 cfg.cfg_instance = NULL;
2174 cfg.cfg_uuid = mds->mds_lov_uuid;
2175 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2177 lgctxt = llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT);
2179 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2180 GOTO(err_llog, rc = -EINVAL);
2183 rc = class_config_process_llog(lgctxt, mds->mds_profile, &cfg);
2184 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2189 lprof = class_get_profile(mds->mds_profile);
2190 if (lprof == NULL) {
2191 CERROR("No profile found: %s\n", mds->mds_profile);
2192 GOTO(err_cleanup, rc = -ENOENT);
2194 rc = mds_lov_connect(obd, lprof->lp_osc);
2196 GOTO(err_cleanup, rc);
2198 rc = mds_lmv_postsetup(obd);
2200 GOTO(err_cleanup, rc);
2208 obd_llog_cleanup(llog_get_context(&obd->obd_llogs,
2209 LLOG_CONFIG_ORIG_CTXT));
2213 int mds_postrecov(struct obd_device *obd)
2215 struct mds_obd *mds = &obd->u.mds;
2216 struct llog_ctxt *ctxt;
2220 LASSERT(!obd->obd_recovering);
2221 ctxt = llog_get_context(&obd->obd_llogs, LLOG_UNLINK_ORIG_CTXT);
2222 LASSERT(ctxt != NULL);
2224 /* set nextid first, so we are sure it happens */
2225 rc = mds_lov_set_nextid(obd);
2227 CERROR("%s: mds_lov_set_nextid failed\n", obd->obd_name);
2231 /* clean PENDING dir */
2232 rc = mds_cleanup_orphans(obd);
2237 rc = llog_connect(ctxt, obd->u.mds.mds_lov_desc.ld_tgt_count,
2240 CERROR("%s: failed at llog_origin_connect: %d\n",
2245 /* remove the orphaned precreated objects */
2246 rc = mds_lov_clearorphans(mds, NULL /* all OSTs */);
2251 RETURN(rc < 0 ? rc : item);
2254 /* cleanup all llogging subsystems */
2255 rc = obd_llog_finish(obd, &obd->obd_llogs,
2256 mds->mds_lov_desc.ld_tgt_count);
2258 CERROR("%s: failed to cleanup llogging subsystems\n",
2263 int mds_lov_clean(struct obd_device *obd)
2265 struct mds_obd *mds = &obd->u.mds;
2267 if (mds->mds_profile) {
2269 struct config_llog_instance cfg;
2270 struct lvfs_run_ctxt saved;
2271 int len = strlen(mds->mds_profile) + sizeof("-clean") + 1;
2273 OBD_ALLOC(cln_prof, len);
2274 sprintf(cln_prof, "%s-clean", mds->mds_profile);
2276 cfg.cfg_instance = NULL;
2277 cfg.cfg_uuid = mds->mds_lov_uuid;
2279 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2280 class_config_process_llog(llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT),
2282 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2284 OBD_FREE(cln_prof, len);
2285 OBD_FREE(mds->mds_profile, strlen(mds->mds_profile) + 1);
2286 mds->mds_profile = NULL;
2291 int mds_lmv_clean(struct obd_device *obd)
2293 struct mds_obd *mds = &obd->u.mds;
2295 if (mds->mds_lmv_name) {
2296 OBD_FREE(mds->mds_lmv_name, strlen(mds->mds_lmv_name) + 1);
2297 mds->mds_lmv_name = NULL;
2302 static int mds_precleanup(struct obd_device *obd, int flags)
2308 mds_lov_disconnect(obd, flags);
2310 obd_llog_cleanup(llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT));
2314 static int mds_cleanup(struct obd_device *obd, int flags)
2316 struct mds_obd *mds = &obd->u.mds;
2319 if (mds->mds_sb == NULL)
2322 mds_update_server_data(obd, 1);
2323 if (mds->mds_lov_objids != NULL) {
2324 OBD_FREE(mds->mds_lov_objids,
2325 mds->mds_lov_desc.ld_tgt_count * sizeof(obd_id));
2327 mds_fs_cleanup(obd, flags);
2331 /* 2 seems normal on mds, (may_umount() also expects 2
2332 fwiw), but we only see 1 at this point in obdfilter. */
2333 if (atomic_read(&obd->u.mds.mds_vfsmnt->mnt_count) > 2)
2334 CERROR("%s: mount busy, mnt_count %d != 2\n", obd->obd_name,
2335 atomic_read(&obd->u.mds.mds_vfsmnt->mnt_count));
2337 mntput(mds->mds_vfsmnt);
2341 ldlm_namespace_free(obd->obd_namespace, flags & OBD_OPT_FORCE);
2343 if (mds->mds_counters) {
2344 lprocfs_free_mds_counters(mds->mds_counters);
2347 spin_lock_bh(&obd->obd_processing_task_lock);
2348 if (obd->obd_recovering) {
2349 target_cancel_recovery_timer(obd);
2350 obd->obd_recovering = 0;
2352 spin_unlock_bh(&obd->obd_processing_task_lock);
2355 dev_clear_rdonly(2);
2356 fsfilt_put_ops(obd->obd_fsops);
2361 static void fixup_handle_for_resent_req(struct ptlrpc_request *req,
2362 struct ldlm_lock *new_lock,
2363 struct lustre_handle *lockh)
2365 struct obd_export *exp = req->rq_export;
2366 struct obd_device *obd = exp->exp_obd;
2367 struct ldlm_request *dlmreq =
2368 lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*dlmreq));
2369 struct lustre_handle remote_hdl = dlmreq->lock_handle1;
2370 struct list_head *iter;
2372 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
2375 l_lock(&obd->obd_namespace->ns_lock);
2376 list_for_each(iter, &exp->exp_ldlm_data.led_held_locks) {
2377 struct ldlm_lock *lock;
2378 lock = list_entry(iter, struct ldlm_lock, l_export_chain);
2379 if (lock == new_lock)
2381 if (lock->l_remote_handle.cookie == remote_hdl.cookie) {
2382 lockh->cookie = lock->l_handle.h_cookie;
2383 DEBUG_REQ(D_HA, req, "restoring lock cookie "LPX64,
2385 l_unlock(&obd->obd_namespace->ns_lock);
2389 l_unlock(&obd->obd_namespace->ns_lock);
2391 /* If the xid matches, then we know this is a resent request,
2392 * and allow it. (It's probably an OPEN, for which we don't
2394 if (req->rq_xid == exp->exp_mds_data.med_mcd->mcd_last_xid)
2397 /* This remote handle isn't enqueued, so we never received or
2398 * processed this request. Clear MSG_RESENT, because it can
2399 * be handled like any normal request now. */
2401 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
2403 DEBUG_REQ(D_HA, req, "no existing lock with rhandle "LPX64,
2407 int intent_disposition(struct ldlm_reply *rep, int flag)
2411 return (rep->lock_policy_res1 & flag);
2414 void intent_set_disposition(struct ldlm_reply *rep, int flag)
2418 rep->lock_policy_res1 |= flag;
2421 static int mds_intent_policy(struct ldlm_namespace *ns,
2422 struct ldlm_lock **lockp, void *req_cookie,
2423 ldlm_mode_t mode, int flags, void *data)
2425 struct ptlrpc_request *req = req_cookie;
2426 struct ldlm_lock *lock = *lockp;
2427 struct ldlm_intent *it;
2428 struct mds_obd *mds = &req->rq_export->exp_obd->u.mds;
2429 struct ldlm_reply *rep;
2430 struct lustre_handle lockh = { 0 };
2431 struct ldlm_lock *new_lock;
2432 int getattr_part = MDS_INODELOCK_UPDATE;
2433 int rc, offset = 2, repsize[4] = {sizeof(struct ldlm_reply),
2434 sizeof(struct mds_body),
2435 mds->mds_max_mdsize,
2436 mds->mds_max_cookiesize};
2439 LASSERT(req != NULL);
2441 if (req->rq_reqmsg->bufcount <= 1) {
2442 /* No intent was provided */
2443 int size = sizeof(struct ldlm_reply);
2444 rc = lustre_pack_reply(req, 1, &size, NULL);
2449 it = lustre_swab_reqbuf(req, 1, sizeof(*it), lustre_swab_ldlm_intent);
2451 CERROR("Intent missing\n");
2452 RETURN(req->rq_status = -EFAULT);
2455 LDLM_DEBUG(lock, "intent policy, opc: %s", ldlm_it2str(it->opc));
2457 rc = lustre_pack_reply(req, 3, repsize, NULL);
2459 RETURN(req->rq_status = rc);
2461 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
2462 intent_set_disposition(rep, DISP_IT_EXECD);
2464 fixup_handle_for_resent_req(req, lock, &lockh);
2466 /* execute policy */
2467 switch ((long)it->opc) {
2469 case IT_CREAT|IT_OPEN:
2470 /* XXX swab here to assert that an mds_open reint
2471 * packet is following */
2472 rep->lock_policy_res2 = mds_reint(req, offset, &lockh);
2474 /* We abort the lock if the lookup was negative and
2475 * we did not make it to the OPEN portion */
2476 if (!intent_disposition(rep, DISP_LOOKUP_EXECD))
2477 RETURN(ELDLM_LOCK_ABORTED);
2478 if (intent_disposition(rep, DISP_LOOKUP_NEG) &&
2479 !intent_disposition(rep, DISP_OPEN_OPEN))
2481 /* IT_OPEN may return lock on cross-node dentry
2482 * that we want to hold during attr retrival -bzzz */
2483 if (rc != 0 || lockh.cookie == 0)
2484 RETURN(ELDLM_LOCK_ABORTED);
2487 getattr_part = MDS_INODELOCK_LOOKUP;
2490 getattr_part |= MDS_INODELOCK_LOOKUP;
2492 rep->lock_policy_res2 = mds_getattr_name(offset, req, &lockh,
2494 /* FIXME: LDLM can set req->rq_status. MDS sets
2495 policy_res{1,2} with disposition and status.
2496 - replay: returns 0 & req->status is old status
2497 - otherwise: returns req->status */
2498 if (intent_disposition(rep, DISP_LOOKUP_NEG))
2499 rep->lock_policy_res2 = 0;
2500 if (!intent_disposition(rep, DISP_LOOKUP_POS) ||
2501 rep->lock_policy_res2)
2502 RETURN(ELDLM_LOCK_ABORTED);
2503 if (req->rq_status != 0) {
2505 rep->lock_policy_res2 = req->rq_status;
2506 RETURN(ELDLM_LOCK_ABORTED);
2510 rc = mds_lock_and_check_slave(offset, req, &lockh);
2511 if ((rep->lock_policy_res2 = rc)) {
2513 rep->lock_policy_res2 = 0;
2514 RETURN(ELDLM_LOCK_ABORTED);
2518 CERROR("Unhandled intent "LPD64"\n", it->opc);
2522 /* By this point, whatever function we called above must have either
2523 * filled in 'lockh', been an intent replay, or returned an error. We
2524 * want to allow replayed RPCs to not get a lock, since we would just
2525 * drop it below anyways because lock replay is done separately by the
2526 * client afterwards. For regular RPCs we want to give the new lock to
2527 * the client instead of whatever lock it was about to get. */
2528 new_lock = ldlm_handle2lock(&lockh);
2529 if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY))
2532 LASSERT(new_lock != NULL);
2534 /* If we've already given this lock to a client once, then we should
2535 * have no readers or writers. Otherwise, we should have one reader
2536 * _or_ writer ref (which will be zeroed below) before returning the
2537 * lock to a client. */
2538 if (new_lock->l_export == req->rq_export) {
2539 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
2541 LASSERT(new_lock->l_export == NULL);
2542 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
2547 if (new_lock->l_export == req->rq_export) {
2548 /* Already gave this to the client, which means that we
2549 * reconstructed a reply. */
2550 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
2552 RETURN(ELDLM_LOCK_REPLACED);
2555 /* Fixup the lock to be given to the client */
2556 l_lock(&new_lock->l_resource->lr_namespace->ns_lock);
2557 new_lock->l_readers = 0;
2558 new_lock->l_writers = 0;
2560 new_lock->l_export = class_export_get(req->rq_export);
2561 list_add(&new_lock->l_export_chain,
2562 &new_lock->l_export->exp_ldlm_data.led_held_locks);
2564 new_lock->l_blocking_ast = lock->l_blocking_ast;
2565 new_lock->l_completion_ast = lock->l_completion_ast;
2567 memcpy(&new_lock->l_remote_handle, &lock->l_remote_handle,
2568 sizeof(lock->l_remote_handle));
2570 new_lock->l_flags &= ~LDLM_FL_LOCAL;
2572 LDLM_LOCK_PUT(new_lock);
2573 l_unlock(&new_lock->l_resource->lr_namespace->ns_lock);
2575 RETURN(ELDLM_LOCK_REPLACED);
2578 int mds_attach(struct obd_device *dev, obd_count len, void *data)
2580 struct lprocfs_static_vars lvars;
2582 lprocfs_init_multi_vars(0, &lvars);
2583 return lprocfs_obd_attach(dev, lvars.obd_vars);
2586 int mds_detach(struct obd_device *dev)
2588 return lprocfs_obd_detach(dev);
2591 int mdt_attach(struct obd_device *dev, obd_count len, void *data)
2593 struct lprocfs_static_vars lvars;
2595 lprocfs_init_multi_vars(1, &lvars);
2596 return lprocfs_obd_attach(dev, lvars.obd_vars);
2599 int mdt_detach(struct obd_device *dev)
2601 return lprocfs_obd_detach(dev);
2604 static int mdt_setup(struct obd_device *obd, obd_count len, void *buf)
2606 struct mds_obd *mds = &obd->u.mds;
2611 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2612 MDS_REQUEST_PORTAL, MDC_REPLY_PORTAL,
2613 mds_handle, "mds", obd->obd_proc_entry);
2615 if (!mds->mds_service) {
2616 CERROR("failed to start service\n");
2620 rc = ptlrpc_start_n_threads(obd, mds->mds_service, MDT_NUM_THREADS,
2623 GOTO(err_thread, rc);
2625 mds->mds_setattr_service =
2626 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2627 MDS_SETATTR_PORTAL, MDC_REPLY_PORTAL,
2628 mds_handle, "mds_setattr",
2629 obd->obd_proc_entry);
2630 if (!mds->mds_setattr_service) {
2631 CERROR("failed to start getattr service\n");
2632 GOTO(err_thread, rc = -ENOMEM);
2635 rc = ptlrpc_start_n_threads(obd, mds->mds_setattr_service,
2636 MDT_NUM_THREADS, "ll_mdt_attr");
2638 GOTO(err_thread2, rc);
2640 mds->mds_readpage_service =
2641 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2642 MDS_READPAGE_PORTAL, MDC_REPLY_PORTAL,
2643 mds_handle, "mds_readpage",
2644 obd->obd_proc_entry);
2645 if (!mds->mds_readpage_service) {
2646 CERROR("failed to start readpage service\n");
2647 GOTO(err_thread2, rc = -ENOMEM);
2650 rc = ptlrpc_start_n_threads(obd, mds->mds_readpage_service,
2651 MDT_NUM_THREADS, "ll_mdt_rdpg");
2654 GOTO(err_thread3, rc);
2659 ptlrpc_unregister_service(mds->mds_readpage_service);
2661 ptlrpc_unregister_service(mds->mds_setattr_service);
2663 ptlrpc_unregister_service(mds->mds_service);
2667 static int mdt_cleanup(struct obd_device *obd, int flags)
2669 struct mds_obd *mds = &obd->u.mds;
2672 ptlrpc_stop_all_threads(mds->mds_readpage_service);
2673 ptlrpc_unregister_service(mds->mds_readpage_service);
2675 ptlrpc_stop_all_threads(mds->mds_setattr_service);
2676 ptlrpc_unregister_service(mds->mds_setattr_service);
2678 ptlrpc_stop_all_threads(mds->mds_service);
2679 ptlrpc_unregister_service(mds->mds_service);
2684 static struct dentry *mds_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
2687 struct obd_device *obd = data;
2690 fid.generation = gen;
2691 return mds_fid2dentry(&obd->u.mds, &fid, NULL);
2694 static int mds_get_info(struct obd_export *exp, __u32 keylen,
2695 void *key, __u32 *vallen, void *val)
2697 struct obd_device *obd;
2698 struct mds_obd *mds;
2701 obd = class_exp2obd(exp);
2703 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
2704 exp->exp_handle.h_cookie);
2708 if (keylen >= strlen("reint_log") && memcmp(key, "reint_log", 9) == 0) {
2709 /*Get log_context handle*/
2710 unsigned long *llh_handle = val;
2711 *vallen = sizeof(unsigned long);
2712 *llh_handle = (unsigned long)obd->obd_llog_ctxt[LLOG_REINT_ORIG_CTXT];
2715 if (keylen >= strlen("cache_sb") && memcmp(key, "cache_sb", 8) == 0) {
2716 /*Get log_context handle*/
2717 unsigned long *sb = val;
2718 *vallen = sizeof(unsigned long);
2719 *sb = (unsigned long)obd->u.mds.mds_sb;
2724 if (keylen >= strlen("mdsize") && memcmp(key, "mdsize", keylen) == 0) {
2725 __u32 *mdsize = val;
2726 *vallen = sizeof(*mdsize);
2727 *mdsize = mds->mds_max_mdsize;
2731 CDEBUG(D_IOCTL, "invalid key\n");
2735 struct lvfs_callback_ops mds_lvfs_ops = {
2736 l_fid2dentry: mds_lvfs_fid2dentry,
2739 int mds_preprw(int cmd, struct obd_export *exp, struct obdo *oa,
2740 int objcount, struct obd_ioobj *obj,
2741 int niocount, struct niobuf_remote *nb,
2742 struct niobuf_local *res,
2743 struct obd_trans_info *oti);
2744 int mds_commitrw(int cmd, struct obd_export *exp, struct obdo *oa,
2745 int objcount, struct obd_ioobj *obj, int niocount,
2746 struct niobuf_local *res, struct obd_trans_info *oti,
2749 /* use obd ops to offer management infrastructure */
2750 static struct obd_ops mds_obd_ops = {
2751 .o_owner = THIS_MODULE,
2752 .o_attach = mds_attach,
2753 .o_detach = mds_detach,
2754 .o_connect = mds_connect,
2755 .o_init_export = mds_init_export,
2756 .o_destroy_export = mds_destroy_export,
2757 .o_disconnect = mds_disconnect,
2758 .o_setup = mds_setup,
2759 .o_precleanup = mds_precleanup,
2760 .o_cleanup = mds_cleanup,
2761 .o_postrecov = mds_postrecov,
2762 .o_statfs = mds_obd_statfs,
2763 .o_iocontrol = mds_iocontrol,
2764 .o_create = mds_obd_create,
2765 .o_destroy = mds_obd_destroy,
2766 .o_llog_init = mds_llog_init,
2767 .o_llog_finish = mds_llog_finish,
2768 .o_notify = mds_notify,
2769 .o_get_info = mds_get_info,
2770 .o_set_info = mds_set_info,
2771 .o_preprw = mds_preprw,
2772 .o_commitrw = mds_commitrw,
2775 static struct obd_ops mdt_obd_ops = {
2776 .o_owner = THIS_MODULE,
2777 .o_attach = mdt_attach,
2778 .o_detach = mdt_detach,
2779 .o_setup = mdt_setup,
2780 .o_cleanup = mdt_cleanup,
2781 .o_attach = mdt_attach,
2782 .o_detach = mdt_detach,
2785 static int __init mds_init(void)
2787 struct lprocfs_static_vars lvars;
2789 lprocfs_init_multi_vars(0, &lvars);
2790 class_register_type(&mds_obd_ops, NULL, lvars.module_vars,
2792 lprocfs_init_multi_vars(1, &lvars);
2793 class_register_type(&mdt_obd_ops, NULL, lvars.module_vars,
2799 static void /*__exit*/ mds_exit(void)
2801 class_unregister_type(LUSTRE_MDS_NAME);
2802 class_unregister_type(LUSTRE_MDT_NAME);
2805 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2806 MODULE_DESCRIPTION("Lustre Metadata Server (MDS)");
2807 MODULE_LICENSE("GPL");
2809 module_init(mds_init);
2810 module_exit(mds_exit);