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 kmap(pages[i]), tmpsize, &offset);
108 GOTO(cleanup_buf, rc = -EIO);
111 LASSERT(desc->bd_nob == count);
113 rc = ptlrpc_start_bulk_transfer(desc);
115 GOTO(cleanup_buf, rc);
117 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
118 CERROR("obd_fail_loc=%x, fail operation rc=%d\n",
119 OBD_FAIL_MDS_SENDPAGE, rc);
120 GOTO(abort_bulk, rc);
123 lwi = LWI_TIMEOUT(obd_timeout * HZ / 4, NULL, NULL);
124 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc), &lwi);
125 LASSERT (rc == 0 || rc == -ETIMEDOUT);
128 if (desc->bd_success &&
129 desc->bd_nob_transferred == count)
130 GOTO(cleanup_buf, rc);
132 rc = -ETIMEDOUT; /* XXX should this be a different errno? */
135 DEBUG_REQ(D_ERROR, req, "bulk failed: %s %d(%d), evicting %s@%s\n",
136 (rc == -ETIMEDOUT) ? "timeout" : "network error",
137 desc->bd_nob_transferred, count,
138 req->rq_export->exp_client_uuid.uuid,
139 req->rq_export->exp_connection->c_remote_uuid.uuid);
141 ptlrpc_fail_export(req->rq_export);
145 ptlrpc_abort_bulk (desc);
147 for (i = 0; i < npages; i++)
149 __free_pages(pages[i], 0);
151 ptlrpc_free_bulk(desc);
153 OBD_FREE(pages, sizeof(*pages) * npages);
158 int mds_lock_mode_for_dir(struct obd_device *obd,
159 struct dentry *dentry, int mode)
163 /* any dir access needs couple locks:
164 * 1) on part of dir we gonna lookup/modify in
165 * 2) on a whole dir to protect it from concurrent splitting
166 * and to flush client's cache for readdir()
167 * so, for a given mode and dentry this routine decides what
168 * lock mode to use for lock #2:
169 * 1) if caller's gonna lookup in dir then we need to protect
170 * dir from being splitted only - LCK_CR
171 * 2) if caller's gonna modify dir then we need to protect
172 * dir from being splitted and to flush cache - LCK_CW
173 * 3) if caller's gonna modify dir and that dir seems ready
174 * for splitting then we need to protect it from any
175 * type of access (lookup/modify/split) - LCK_EX -bzzz */
177 if (mode == LCK_PR) {
179 } else if (mode == LCK_PW) {
180 /* caller gonna modify directory.we use concurrent
181 write lock here to retract client's cache for readdir */
183 if (mds_splitting_expected(obd, dentry)) {
184 /* splitting possible. serialize any access */
185 CERROR("%s: gonna split %lu/%lu\n",
187 (unsigned long) dentry->d_inode->i_ino,
188 (unsigned long) dentry->d_inode->i_generation);
192 CWARN("unexpected lock mode %d\n", mode);
198 /* only valid locked dentries or errors should be returned */
199 struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
200 struct vfsmount **mnt, int lock_mode,
201 struct lustre_handle *lockh, int *mode,
202 char *name, int namelen, __u64 lockpart)
204 struct mds_obd *mds = &obd->u.mds;
205 struct dentry *de = mds_fid2dentry(mds, fid, mnt), *retval = de;
206 struct ldlm_res_id res_id = { .name = {0} };
208 ldlm_policy_data_t policy = { .l_inodebits = { lockpart } };
215 res_id.name[0] = de->d_inode->i_ino;
216 res_id.name[1] = de->d_inode->i_generation;
219 if (name && IS_PDIROPS(de->d_inode)) {
220 ldlm_policy_data_t cpolicy =
221 { .l_inodebits = { MDS_INODELOCK_UPDATE } };
222 LASSERT(mode != NULL);
223 *mode = mds_lock_mode_for_dir(obd, de, lock_mode);
224 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
226 &cpolicy, *mode, &flags,
228 ldlm_completion_ast, NULL, NULL,
229 NULL, 0, NULL, lockh + 1);
230 if (rc != ELDLM_OK) {
232 RETURN(ERR_PTR(-ENOLCK));
236 res_id.name[2] = full_name_hash(name, namelen);
238 CDEBUG(D_INFO, "take lock on %lu:%u:"LPX64"\n",
239 de->d_inode->i_ino, de->d_inode->i_generation,
243 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, res_id,
244 LDLM_IBITS, &policy, lock_mode, &flags,
245 mds_blocking_ast, ldlm_completion_ast, NULL, NULL,
246 NULL, 0, NULL, lockh);
247 if (rc != ELDLM_OK) {
249 retval = ERR_PTR(-EIO); /* XXX translate ldlm code */
252 ldlm_lock_decref(lockh + 1, LCK_CW);
259 #ifndef DCACHE_DISCONNECTED
260 #define DCACHE_DISCONNECTED DCACHE_NFSD_DISCONNECTED
264 /* Look up an entry by inode number. */
265 /* this function ONLY returns valid dget'd dentries with an initialized inode
267 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
268 struct vfsmount **mnt)
271 unsigned long ino = fid->id;
272 __u32 generation = fid->generation;
274 struct dentry *result;
277 RETURN(ERR_PTR(-ESTALE));
279 snprintf(fid_name, sizeof(fid_name), "0x%lx", ino);
281 CDEBUG(D_DENTRY, "--> mds_fid2dentry: ino/gen %lu/%u, sb %p\n",
282 ino, generation, mds->mds_sb);
284 /* under ext3 this is neither supposed to return bad inodes
286 result = ll_lookup_one_len(fid_name, mds->mds_fid_de, strlen(fid_name));
290 inode = result->d_inode;
292 RETURN(ERR_PTR(-ENOENT));
295 /* here we disabled generation check, as root inode i_generation
296 * of cache mds and real mds are different. */
297 if (generation && inode->i_generation != generation) {
298 /* we didn't find the right inode.. */
299 CERROR("bad inode %lu, link: %lu ct: %d or generation %u/%u\n",
300 inode->i_ino, (unsigned long)inode->i_nlink,
301 atomic_read(&inode->i_count), inode->i_generation,
304 RETURN(ERR_PTR(-ENOENT));
309 *mnt = mds->mds_vfsmnt;
317 /* Establish a connection to the MDS.
319 * This will set up an export structure for the client to hold state data
320 * about that client, like open files, the last operation number it did
321 * on the server, etc.
323 static int mds_connect(struct lustre_handle *conn, struct obd_device *obd,
324 struct obd_uuid *cluuid)
326 struct obd_export *exp;
327 struct mds_export_data *med; /* */
328 struct mds_client_data *mcd;
329 int rc, abort_recovery;
332 if (!conn || !obd || !cluuid)
335 /* Check for aborted recovery. */
336 spin_lock_bh(&obd->obd_processing_task_lock);
337 abort_recovery = obd->obd_abort_recovery;
338 spin_unlock_bh(&obd->obd_processing_task_lock);
340 target_abort_recovery(obd);
342 /* XXX There is a small race between checking the list and adding a
343 * new connection for the same UUID, but the real threat (list
344 * corruption when multiple different clients connect) is solved.
346 * There is a second race between adding the export to the list,
347 * and filling in the client data below. Hence skipping the case
348 * of NULL mcd above. We should already be controlling multiple
349 * connects at the client, and we can't hold the spinlock over
350 * memory allocations without risk of deadlocking.
352 rc = class_connect(conn, obd, cluuid);
355 exp = class_conn2export(conn);
357 med = &exp->exp_mds_data;
359 OBD_ALLOC(mcd, sizeof(*mcd));
361 CERROR("mds: out of memory for client data\n");
362 GOTO(out, rc = -ENOMEM);
365 memcpy(mcd->mcd_uuid, cluuid, sizeof(mcd->mcd_uuid));
368 rc = mds_client_add(obd, &obd->u.mds, med, -1);
373 OBD_FREE(mcd, sizeof(*mcd));
374 class_disconnect(exp, 0);
376 class_export_put(exp);
381 static int mds_init_export(struct obd_export *exp)
383 struct mds_export_data *med = &exp->exp_mds_data;
385 INIT_LIST_HEAD(&med->med_open_head);
386 spin_lock_init(&med->med_open_lock);
390 static int mds_destroy_export(struct obd_export *export)
392 struct mds_export_data *med;
393 struct obd_device *obd = export->exp_obd;
394 struct lvfs_run_ctxt saved;
398 med = &export->exp_mds_data;
399 target_destroy_export(export);
401 if (obd_uuid_equals(&export->exp_client_uuid, &obd->obd_uuid))
404 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
406 /* Close any open files (which may also cause orphan unlinking). */
407 spin_lock(&med->med_open_lock);
408 while (!list_empty(&med->med_open_head)) {
409 struct list_head *tmp = med->med_open_head.next;
410 struct mds_file_data *mfd =
411 list_entry(tmp, struct mds_file_data, mfd_list);
412 BDEVNAME_DECLARE_STORAGE(btmp);
414 /* bug 1579: fix force-closing for 2.5 */
415 struct dentry *dentry = mfd->mfd_dentry;
417 list_del(&mfd->mfd_list);
418 spin_unlock(&med->med_open_lock);
420 /* If you change this message, be sure to update
421 * replay_single:test_46 */
422 CERROR("force closing client file handle for %*s (%s:%lu)\n",
423 dentry->d_name.len, dentry->d_name.name,
424 ll_bdevname(dentry->d_inode->i_sb, btmp),
425 dentry->d_inode->i_ino);
426 rc = mds_mfd_close(NULL, obd, mfd,
427 !(export->exp_flags & OBD_OPT_FAILOVER));
430 CDEBUG(D_INODE, "Error closing file: %d\n", rc);
431 spin_lock(&med->med_open_lock);
433 spin_unlock(&med->med_open_lock);
434 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
437 mds_client_free(export, !(export->exp_flags & OBD_OPT_FAILOVER));
442 static int mds_disconnect(struct obd_export *exp, int flags)
444 struct obd_device *obd;
446 unsigned long irqflags;
451 class_export_get(exp);
453 obd = class_exp2obd(exp);
455 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
456 exp->exp_handle.h_cookie);
461 if (!(exp->exp_flags & OBD_OPT_REAL_CLIENT)
462 && !atomic_read(&mds->mds_real_clients)) {
463 /* there was no client at all */
464 mds_lmv_disconnect(obd, flags);
467 if ((exp->exp_flags & OBD_OPT_REAL_CLIENT)
468 && atomic_dec_and_test(&mds->mds_real_clients)) {
469 /* time to drop LMV connections */
470 CDEBUG(D_OTHER, "%s: last real client %s disconnected. "
471 "Disconnnect from LMV now\n",
472 obd->obd_name, exp->exp_client_uuid.uuid);
473 mds_lmv_disconnect(obd, flags);
476 spin_lock_irqsave(&exp->exp_lock, irqflags);
477 exp->exp_flags = flags;
478 spin_unlock_irqrestore(&exp->exp_lock, irqflags);
480 /* Disconnect early so that clients can't keep using export */
481 rc = class_disconnect(exp, flags);
482 ldlm_cancel_locks_for_export(exp);
484 /* complete all outstanding replies */
485 spin_lock_irqsave(&exp->exp_lock, irqflags);
486 while (!list_empty(&exp->exp_outstanding_replies)) {
487 struct ptlrpc_reply_state *rs =
488 list_entry(exp->exp_outstanding_replies.next,
489 struct ptlrpc_reply_state, rs_exp_list);
490 struct ptlrpc_service *svc = rs->rs_srv_ni->sni_service;
492 spin_lock(&svc->srv_lock);
493 list_del_init(&rs->rs_exp_list);
494 ptlrpc_schedule_difficult_reply(rs);
495 spin_unlock(&svc->srv_lock);
497 spin_unlock_irqrestore(&exp->exp_lock, irqflags);
499 class_export_put(exp);
503 static int mds_getstatus(struct ptlrpc_request *req)
505 struct mds_obd *mds = mds_req2mds(req);
506 struct mds_body *body;
507 int rc, size = sizeof(*body);
510 rc = lustre_pack_reply(req, 1, &size, NULL);
511 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_GETSTATUS_PACK)) {
512 CERROR("mds: out of memory for message: size=%d\n", size);
513 req->rq_status = -ENOMEM; /* superfluous? */
517 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
518 memcpy(&body->fid1, &mds->mds_rootfid, sizeof(body->fid1));
520 /* the last_committed and last_xid fields are filled in for all
521 * replies already - no need to do so here also.
526 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
527 void *data, int flag)
532 if (flag == LDLM_CB_CANCELING) {
533 /* Don't need to do anything here. */
537 /* XXX layering violation! -phil */
538 l_lock(&lock->l_resource->lr_namespace->ns_lock);
539 /* Get this: if mds_blocking_ast is racing with mds_intent_policy,
540 * such that mds_blocking_ast is called just before l_i_p takes the
541 * ns_lock, then by the time we get the lock, we might not be the
542 * correct blocking function anymore. So check, and return early, if
544 if (lock->l_blocking_ast != mds_blocking_ast) {
545 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
549 lock->l_flags |= LDLM_FL_CBPENDING;
550 do_ast = (!lock->l_readers && !lock->l_writers);
551 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
554 struct lustre_handle lockh;
557 LDLM_DEBUG(lock, "already unused, calling ldlm_cli_cancel");
558 ldlm_lock2handle(lock, &lockh);
559 rc = ldlm_cli_cancel(&lockh);
561 CERROR("ldlm_cli_cancel: %d\n", rc);
563 LDLM_DEBUG(lock, "Lock still has references, will be "
569 int mds_get_md(struct obd_device *obd, struct inode *inode, void *md,
577 rc = fsfilt_get_md(obd, inode, md, *size);
582 CERROR("Error %d reading eadata for ino %lu\n",
587 if (S_ISREG(inode->i_mode))
588 rc = mds_convert_lov_ea(obd, inode, md, lmm_size);
602 /* Call with lock=1 if you want mds_pack_md to take the i_sem.
603 * Call with lock=0 if the caller has already taken the i_sem. */
604 int mds_pack_md(struct obd_device *obd, struct lustre_msg *msg, int offset,
605 struct mds_body *body, struct inode *inode, int lock)
607 struct mds_obd *mds = &obd->u.mds;
613 lmm = lustre_msg_buf(msg, offset, 0);
615 /* Some problem with getting eadata when I sized the reply
617 CDEBUG(D_INFO, "no space reserved for inode %lu MD\n",
621 lmm_size = msg->buflens[offset];
623 /* I don't really like this, but it is a sanity check on the client
624 * MD request. However, if the client doesn't know how much space
625 * to reserve for the MD, it shouldn't be bad to have too much space.
627 if (lmm_size > mds->mds_max_mdsize) {
628 CWARN("Reading MD for inode %lu of %d bytes > max %d\n",
629 inode->i_ino, lmm_size, mds->mds_max_mdsize);
633 rc = mds_get_md(obd, inode, lmm, &lmm_size, lock);
635 if (S_ISDIR(inode->i_mode))
636 body->valid |= OBD_MD_FLDIREA;
638 body->valid |= OBD_MD_FLEASIZE;
639 body->eadatasize = lmm_size;
646 static int mds_getattr_internal(struct obd_device *obd, struct dentry *dentry,
647 struct ptlrpc_request *req,
648 struct mds_body *reqbody, int reply_off)
650 struct mds_body *body;
651 struct inode *inode = dentry->d_inode;
655 if (inode == NULL && !(dentry->d_flags & DCACHE_CROSS_REF))
658 body = lustre_msg_buf(req->rq_repmsg, reply_off, sizeof(*body));
659 LASSERT(body != NULL); /* caller prepped reply */
661 if (dentry->d_flags & DCACHE_CROSS_REF) {
662 CDEBUG(D_OTHER, "cross reference: %lu/%lu/%lu\n",
663 (unsigned long) dentry->d_mdsnum,
664 (unsigned long) dentry->d_inum,
665 (unsigned long) dentry->d_generation);
666 body->valid |= OBD_MD_FLID | OBD_MD_MDS;
667 body->fid1.id = dentry->d_inum;
668 body->fid1.mds = dentry->d_mdsnum;
669 body->fid1.generation = dentry->d_generation;
672 mds_pack_inode2fid(obd, &body->fid1, inode);
673 mds_pack_inode2body(obd, body, inode);
675 if ((S_ISREG(inode->i_mode) && (reqbody->valid & OBD_MD_FLEASIZE)) ||
676 (S_ISDIR(inode->i_mode) && (reqbody->valid & OBD_MD_FLDIREA))) {
677 rc = mds_pack_md(obd, req->rq_repmsg, reply_off + 1, body,
680 /* If we have LOV EA data, the OST holds size, atime, mtime */
681 if (!(body->valid & OBD_MD_FLEASIZE) &&
682 !(body->valid & OBD_MD_FLDIREA))
683 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
684 OBD_MD_FLATIME | OBD_MD_FLMTIME);
685 } else if (S_ISLNK(inode->i_mode) &&
686 (reqbody->valid & OBD_MD_LINKNAME) != 0) {
687 char *symname = lustre_msg_buf(req->rq_repmsg, reply_off + 1,0);
690 LASSERT (symname != NULL); /* caller prepped reply */
691 len = req->rq_repmsg->buflens[reply_off + 1];
693 rc = inode->i_op->readlink(dentry, symname, len);
695 CERROR("readlink failed: %d\n", rc);
696 } else if (rc != len - 1) {
697 CERROR ("Unexpected readlink rc %d: expecting %d\n",
701 CDEBUG(D_INODE, "read symlink dest %s\n", symname);
702 body->valid |= OBD_MD_LINKNAME;
703 body->eadatasize = rc + 1;
704 symname[rc] = 0; /* NULL terminate */
712 static int mds_getattr_pack_msg_cf(struct ptlrpc_request *req,
713 struct dentry *dentry,
716 int rc = 0, size[1] = {sizeof(struct mds_body)};
719 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
720 CERROR("failed MDS_GETATTR_PACK test\n");
721 req->rq_status = -ENOMEM;
722 GOTO(out, rc = -ENOMEM);
725 rc = lustre_pack_reply(req, 1, size, NULL);
727 CERROR("out of memory\n");
728 GOTO(out, req->rq_status = rc);
736 static int mds_getattr_pack_msg(struct ptlrpc_request *req, struct inode *inode,
739 struct mds_obd *mds = mds_req2mds(req);
740 struct mds_body *body;
741 int rc = 0, size[2] = {sizeof(*body)}, bufcount = 1;
744 body = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*body));
745 LASSERT(body != NULL); /* checked by caller */
746 LASSERT_REQSWABBED(req, offset); /* swabbed by caller */
748 if ((S_ISREG(inode->i_mode) && (body->valid & OBD_MD_FLEASIZE)) ||
749 (S_ISDIR(inode->i_mode) && (body->valid & OBD_MD_FLDIREA))) {
752 rc = fsfilt_get_md(req->rq_export->exp_obd, inode, NULL, 0);
754 CDEBUG(D_INODE, "got %d bytes MD data for inode %lu\n",
758 CERROR("error getting inode %lu MD: rc = %d\n",
761 } else if (rc > mds->mds_max_mdsize) {
763 CERROR("MD size %d larger than maximum possible %u\n",
764 rc, mds->mds_max_mdsize);
769 } else if (S_ISLNK(inode->i_mode) && (body->valid & OBD_MD_LINKNAME)) {
770 if (inode->i_size + 1 != body->eadatasize)
771 CERROR("symlink size: %Lu, reply space: %d\n",
772 inode->i_size + 1, body->eadatasize);
773 size[bufcount] = min_t(int, inode->i_size+1, body->eadatasize);
775 CDEBUG(D_INODE, "symlink size: %Lu, reply space: %d\n",
776 inode->i_size + 1, body->eadatasize);
779 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
780 CERROR("failed MDS_GETATTR_PACK test\n");
781 req->rq_status = -ENOMEM;
782 GOTO(out, rc = -ENOMEM);
785 rc = lustre_pack_reply(req, bufcount, size, NULL);
787 CERROR("out of memory\n");
788 GOTO(out, req->rq_status = rc);
796 int mds_check_mds_num(struct obd_device *obd, struct inode* inode,
797 char *name, int namelen)
799 struct mea *mea = NULL;
800 int mea_size, rc = 0;
803 rc = mds_get_lmv_attr(obd, inode, &mea, &mea_size);
807 /* dir is already splitted, check is requested filename
808 * should live at this MDS or at another one */
810 i = mea_name2idx(mea, name, namelen - 1);
811 if (mea->mea_master != i) {
812 CERROR("inapropriate MDS(%d) for %s. should be %d\n",
813 mea->mea_master, name, i);
819 OBD_FREE(mea, mea_size);
823 static int mds_getattr_name(int offset, struct ptlrpc_request *req,
824 struct lustre_handle *child_lockh, int child_part)
826 struct obd_device *obd = req->rq_export->exp_obd;
827 struct ldlm_reply *rep = NULL;
828 struct lvfs_run_ctxt saved;
829 struct mds_body *body;
830 struct dentry *dparent = NULL, *dchild = NULL;
831 struct lvfs_ucred uc;
832 struct lustre_handle parent_lockh[2];
833 int namesize, update_mode;
834 int rc = 0, cleanup_phase = 0, resent_req = 0;
838 LASSERT(!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME));
840 /* Swab now, before anyone looks inside the request */
842 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
843 lustre_swab_mds_body);
845 CERROR("Can't swab mds_body\n");
846 GOTO(cleanup, rc = -EFAULT);
849 LASSERT_REQSWAB(req, offset + 1);
850 name = lustre_msg_string(req->rq_reqmsg, offset + 1, 0);
852 CERROR("Can't unpack name\n");
853 GOTO(cleanup, rc = -EFAULT);
855 namesize = req->rq_reqmsg->buflens[offset + 1];
857 LASSERT (offset == 0 || offset == 2);
858 /* if requests were at offset 2, the getattr reply goes back at 1 */
860 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
864 uc.luc_fsuid = body->fsuid;
865 uc.luc_fsgid = body->fsgid;
866 uc.luc_cap = body->capability;
867 uc.luc_suppgid1 = body->suppgid;
868 uc.luc_suppgid2 = -1;
869 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
870 cleanup_phase = 1; /* kernel context */
871 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
873 LASSERT(namesize > 0);
875 /* we have no dentry here, drop LOOKUP bit */
876 child_part &= ~MDS_INODELOCK_LOOKUP;
877 CDEBUG(D_OTHER, "%s: request to retrieve attrs for %lu/%lu\n",
878 obd->obd_name, (unsigned long) body->fid1.id,
879 (unsigned long) body->fid1.generation);
880 dchild = mds_fid2locked_dentry(obd, &body->fid1, NULL, LCK_PR,
881 parent_lockh, &update_mode,
882 NULL, 0, child_part);
883 if (IS_ERR(dchild)) {
884 CERROR("can't find inode: %d\n", (int) PTR_ERR(dchild));
885 GOTO(cleanup, rc = PTR_ERR(dchild));
887 memcpy(child_lockh, parent_lockh, sizeof(parent_lockh[0]));
889 if (parent_lockh[1].cookie)
890 ldlm_lock_decref(parent_lockh + 1, update_mode);
896 /* FIXME: handle raw lookup */
898 if (body->valid == OBD_MD_FLID) {
899 struct mds_body *mds_reply;
900 int size = sizeof(*mds_reply);
902 // The user requested ONLY the inode number, so do a raw lookup
903 rc = lustre_pack_reply(req, 1, &size, NULL);
905 CERROR("out of memory\n");
909 rc = dir->i_op->lookup_raw(dir, name, namesize - 1, &inum);
911 mds_reply = lustre_msg_buf(req->rq_repmsg, offset,
913 mds_reply->fid1.id = inum;
914 mds_reply->valid = OBD_MD_FLID;
919 if (child_lockh->cookie != 0) {
920 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT);
924 if (resent_req == 0) {
925 rc = mds_get_parent_child_locked(obd, &obd->u.mds, &body->fid1,
926 parent_lockh, &dparent,
927 LCK_PR, MDS_INODELOCK_LOOKUP,
928 &update_mode, name, namesize,
929 child_lockh, &dchild, LCK_PR,
934 struct ldlm_lock *granted_lock;
935 struct ll_fid child_fid;
936 struct ldlm_resource *res;
937 DEBUG_REQ(D_DLMTRACE, req, "resent, not enqueuing new locks");
938 granted_lock = ldlm_handle2lock(child_lockh);
939 LASSERT(granted_lock);
941 res = granted_lock->l_resource;
942 child_fid.id = res->lr_name.name[0];
943 child_fid.generation = res->lr_name.name[1];
944 dchild = mds_fid2dentry(&obd->u.mds, &child_fid, NULL);
946 LDLM_LOCK_PUT(granted_lock);
949 cleanup_phase = 2; /* dchild, dparent, locks */
951 /* let's make sure this name should leave on this mds node */
952 rc = mds_check_mds_num(obd, dparent->d_inode, name, namesize);
958 if (!DENTRY_VALID(dchild)) {
959 intent_set_disposition(rep, DISP_LOOKUP_NEG);
960 /* in the intent case, the policy clears this error:
961 the disposition is enough */
965 intent_set_disposition(rep, DISP_LOOKUP_POS);
968 if (req->rq_repmsg == NULL) {
969 if (dchild->d_flags & DCACHE_CROSS_REF)
970 rc = mds_getattr_pack_msg_cf(req, dchild, offset);
972 rc = mds_getattr_pack_msg(req, dchild->d_inode, offset);
974 CERROR ("mds_getattr_pack_msg: %d\n", rc);
979 rc = mds_getattr_internal(obd, dchild, req, body, offset);
980 GOTO(cleanup, rc); /* returns the lock to the client */
983 switch (cleanup_phase) {
985 if (resent_req == 0) {
986 if (rc && DENTRY_VALID(dchild))
987 ldlm_lock_decref(child_lockh, LCK_PR);
989 ldlm_lock_decref(parent_lockh, LCK_PR);
991 if (parent_lockh[1].cookie != 0)
992 ldlm_lock_decref(parent_lockh + 1,
1001 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1007 static int mds_getattr(int offset, struct ptlrpc_request *req)
1009 struct mds_obd *mds = mds_req2mds(req);
1010 struct obd_device *obd = req->rq_export->exp_obd;
1011 struct lvfs_run_ctxt saved;
1013 struct mds_body *body;
1014 struct lvfs_ucred uc;
1018 body = lustre_swab_reqbuf (req, offset, sizeof (*body),
1019 lustre_swab_mds_body);
1021 CERROR ("Can't unpack body\n");
1025 uc.luc_fsuid = body->fsuid;
1026 uc.luc_fsgid = body->fsgid;
1027 uc.luc_cap = body->capability;
1028 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1029 de = mds_fid2dentry(mds, &body->fid1, NULL);
1031 rc = req->rq_status = -ENOENT;
1032 GOTO(out_pop, PTR_ERR(de));
1035 rc = mds_getattr_pack_msg(req, de->d_inode, offset);
1037 CERROR ("mds_getattr_pack_msg: %d\n", rc);
1041 req->rq_status = mds_getattr_internal(obd, de, req, body, 0);
1046 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1051 static int mds_obd_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1052 unsigned long max_age)
1056 spin_lock(&obd->obd_osfs_lock);
1057 rc = fsfilt_statfs(obd, obd->u.mds.mds_sb, max_age);
1059 memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
1060 spin_unlock(&obd->obd_osfs_lock);
1065 static int mds_statfs(struct ptlrpc_request *req)
1067 struct obd_device *obd = req->rq_export->exp_obd;
1068 int rc, size = sizeof(struct obd_statfs);
1071 rc = lustre_pack_reply(req, 1, &size, NULL);
1072 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK)) {
1073 CERROR("mds: statfs lustre_pack_reply failed: rc = %d\n", rc);
1077 /* We call this so that we can cache a bit - 1 jiffie worth */
1078 rc = mds_obd_statfs(obd, lustre_msg_buf(req->rq_repmsg, 0, size),
1081 CERROR("mds_obd_statfs failed: rc %d\n", rc);
1087 req->rq_status = rc;
1091 static int mds_sync(struct ptlrpc_request *req)
1093 struct obd_device *obd = req->rq_export->exp_obd;
1094 struct mds_obd *mds = &obd->u.mds;
1095 struct mds_body *body;
1096 int rc, size = sizeof(*body);
1099 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
1101 GOTO(out, rc = -EPROTO);
1103 rc = lustre_pack_reply(req, 1, &size, NULL);
1104 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK)) {
1105 CERROR("fsync lustre_pack_reply failed: rc = %d\n", rc);
1109 if (body->fid1.id == 0) {
1110 /* a fid of zero is taken to mean "sync whole filesystem" */
1111 rc = fsfilt_sync(obd, mds->mds_sb);
1115 /* just any file to grab fsync method - "file" arg unused */
1116 struct file *file = mds->mds_rcvd_filp;
1119 de = mds_fid2dentry(mds, &body->fid1, NULL);
1121 GOTO(out, rc = PTR_ERR(de));
1123 rc = file->f_op->fsync(NULL, de, 1);
1128 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
1129 mds_pack_inode2fid(obd, &body->fid1, de->d_inode);
1130 mds_pack_inode2body(obd, body, de->d_inode);
1133 req->rq_status = rc;
1137 /* mds_readpage does not take a DLM lock on the inode, because the client must
1138 * already have a PR lock.
1140 * If we were to take another one here, a deadlock will result, if another
1141 * thread is already waiting for a PW lock. */
1142 static int mds_readpage(struct ptlrpc_request *req)
1144 struct obd_device *obd = req->rq_export->exp_obd;
1145 struct vfsmount *mnt;
1148 struct mds_body *body, *repbody;
1149 struct lvfs_run_ctxt saved;
1150 int rc, size = sizeof(*repbody);
1151 struct lvfs_ucred uc;
1154 rc = lustre_pack_reply(req, 1, &size, NULL);
1155 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK)) {
1156 CERROR("mds: out of memory\n");
1157 GOTO(out, rc = -ENOMEM);
1160 body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
1162 GOTO (out, rc = -EFAULT);
1164 uc.luc_fsuid = body->fsuid;
1165 uc.luc_fsgid = body->fsgid;
1166 uc.luc_cap = body->capability;
1167 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1168 de = mds_fid2dentry(&obd->u.mds, &body->fid1, &mnt);
1170 GOTO(out_pop, rc = PTR_ERR(de));
1172 CDEBUG(D_INODE, "ino %lu\n", de->d_inode->i_ino);
1174 file = dentry_open(de, mnt, O_RDONLY | O_LARGEFILE);
1175 /* note: in case of an error, dentry_open puts dentry */
1177 GOTO(out_pop, rc = PTR_ERR(file));
1179 /* body->size is actually the offset -eeb */
1180 if ((body->size & (de->d_inode->i_blksize - 1)) != 0) {
1181 CERROR("offset "LPU64" not on a block boundary of %lu\n",
1182 body->size, de->d_inode->i_blksize);
1183 GOTO(out_file, rc = -EFAULT);
1186 /* body->nlink is actually the #bytes to read -eeb */
1187 if (body->nlink & (de->d_inode->i_blksize - 1)) {
1188 CERROR("size %u is not multiple of blocksize %lu\n",
1189 body->nlink, de->d_inode->i_blksize);
1190 GOTO(out_file, rc = -EFAULT);
1193 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*repbody));
1194 repbody->size = file->f_dentry->d_inode->i_size;
1195 repbody->valid = OBD_MD_FLSIZE;
1197 /* to make this asynchronous make sure that the handling function
1198 doesn't send a reply when this function completes. Instead a
1199 callback function would send the reply */
1200 /* body->size is actually the offset -eeb */
1201 rc = mds_sendpage(req, file, body->size, body->nlink);
1204 filp_close(file, 0);
1206 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1208 req->rq_status = rc;
1212 int mds_reint(struct ptlrpc_request *req, int offset,
1213 struct lustre_handle *lockh)
1215 struct mds_update_record *rec; /* 116 bytes on the stack? no sir! */
1219 OBD_ALLOC(rec, sizeof(*rec));
1223 rc = mds_update_unpack(req, offset, rec);
1224 if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNPACK)) {
1225 CERROR("invalid record\n");
1226 GOTO(out, req->rq_status = -EINVAL);
1228 /* rc will be used to interrupt a for loop over multiple records */
1229 rc = mds_reint_rec(rec, offset, req, lockh);
1231 OBD_FREE(rec, sizeof(*rec));
1235 static int mds_filter_recovery_request(struct ptlrpc_request *req,
1236 struct obd_device *obd, int *process)
1238 switch (req->rq_reqmsg->opc) {
1239 case MDS_CONNECT: /* This will never get here, but for completeness. */
1240 case OST_CONNECT: /* This will never get here, but for completeness. */
1241 case MDS_DISCONNECT:
1242 case OST_DISCONNECT:
1247 case MDS_SYNC: /* used in unmounting */
1252 *process = target_queue_recovery_request(req, obd);
1256 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
1258 /* XXX what should we set rq_status to here? */
1259 req->rq_status = -EAGAIN;
1260 RETURN(ptlrpc_error(req));
1264 static char *reint_names[] = {
1265 [REINT_SETATTR] "setattr",
1266 [REINT_CREATE] "create",
1267 [REINT_LINK] "link",
1268 [REINT_UNLINK] "unlink",
1269 [REINT_RENAME] "rename",
1270 [REINT_OPEN] "open",
1273 #define FILTER_VALID_FLAGS (OBD_MD_FLTYPE | OBD_MD_FLMODE | OBD_MD_FLGENER |\
1274 OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ|\
1275 OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME|\
1278 static void reconstruct_create(struct ptlrpc_request *req)
1280 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1281 struct mds_client_data *mcd = med->med_mcd;
1282 struct ost_body *body;
1284 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
1286 /* copy rc, transno and disp; steal locks */
1287 mds_req_from_mcd(req, mcd);
1288 CERROR("reconstruct reply for x"LPU64"\n", req->rq_xid);
1291 static int mdt_obj_create(struct ptlrpc_request *req)
1293 struct obd_device *obd = req->rq_export->exp_obd;
1294 struct ldlm_res_id res_id = { .name = {0} };
1295 struct mds_obd *mds = &obd->u.mds;
1296 struct ost_body *body, *repbody;
1297 int rc, size = sizeof(*repbody);
1298 char fidname[LL_FID_NAMELEN];
1299 struct inode *parent_inode;
1300 struct lustre_handle lockh;
1301 struct lvfs_run_ctxt saved;
1302 ldlm_policy_data_t policy;
1303 struct dentry *new = NULL;
1304 struct dentry_params dp;
1305 int mealen, flags = 0;
1306 unsigned int tmpname;
1307 struct lvfs_ucred uc;
1312 DEBUG_REQ(D_HA, req, "create remote object");
1314 parent_inode = mds->mds_objects_dir->d_inode;
1316 body = lustre_swab_reqbuf(req, 0, sizeof(*body),
1317 lustre_swab_ost_body);
1321 MDS_CHECK_RESENT(req, reconstruct_create(req));
1323 uc.luc_fsuid = body->oa.o_uid;
1324 uc.luc_fsgid = body->oa.o_gid;
1326 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1328 rc = lustre_pack_reply(req, 1, &size, NULL);
1332 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
1334 if (body->oa.o_flags & OBD_FL_RECREATE_OBJS) {
1335 /* this is re-create request from MDS holding directory name.
1336 * we have to lookup given ino/generation first. if it exists
1337 * (good case) then there is nothing to do. if it does not
1338 * then we have to recreate it */
1340 fid.id = body->oa.o_id;
1341 fid.generation = body->oa.o_generation;
1342 new = mds_fid2dentry(mds, &fid, NULL);
1343 if (!IS_ERR(new) && new->d_inode) {
1344 CWARN("mkdir() repairing is on its way: %lu/%lu\n",
1345 (unsigned long) fid.id,
1346 (unsigned long) fid.generation);
1347 obdo_from_inode(&repbody->oa, new->d_inode,
1348 FILTER_VALID_FLAGS);
1349 repbody->oa.o_id = new->d_inode->i_ino;
1350 repbody->oa.o_generation = new->d_inode->i_generation;
1351 repbody->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGENER;
1352 GOTO(cleanup2, rc = 0);
1354 CWARN("hmm. for some reason dir %lu/%lu (or reply) got lost\n",
1355 (unsigned long) fid.id, (unsigned long) fid.generation);
1356 LASSERT(new->d_inode == NULL ||
1357 new->d_inode->i_generation != fid.generation);
1361 down(&parent_inode->i_sem);
1362 handle = fsfilt_start(obd, parent_inode, FSFILT_OP_MKDIR, NULL);
1363 LASSERT(!IS_ERR(handle));
1366 tmpname = ll_insecure_random_int();
1367 rc = sprintf(fidname, "%u", tmpname);
1368 new = lookup_one_len(fidname, mds->mds_objects_dir, rc);
1370 CERROR("%s: can't lookup new inode (%s) for mkdir: %d\n",
1371 obd->obd_name, fidname, (int) PTR_ERR(new));
1372 fsfilt_commit(obd, mds->mds_sb, new->d_inode, handle, 0);
1373 up(&parent_inode->i_sem);
1374 RETURN(PTR_ERR(new));
1375 } else if (new->d_inode) {
1376 CERROR("%s: name exists. repeat\n", obd->obd_name);
1380 new->d_fsdata = (void *) &dp;
1384 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1385 DEBUG_REQ(D_HA, req, "replay create obj %lu/%lu",
1386 (unsigned long) body->oa.o_id,
1387 (unsigned long) body->oa.o_generation);
1388 dp.p_inum = body->oa.o_id;
1389 dp.p_generation = body->oa.o_generation;
1391 rc = vfs_mkdir(parent_inode, new, body->oa.o_mode);
1393 obdo_from_inode(&repbody->oa, new->d_inode, FILTER_VALID_FLAGS);
1394 repbody->oa.o_id = new->d_inode->i_ino;
1395 repbody->oa.o_generation = new->d_inode->i_generation;
1396 repbody->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGENER;
1398 rc = fsfilt_del_dir_entry(obd, new);
1399 up(&parent_inode->i_sem);
1402 CERROR("can't remove name for object: %d\n", rc);
1406 /* this lock should be taken to serialize MDS modifications
1407 * in failure case */
1408 res_id.name[0] = new->d_inode->i_ino;
1409 res_id.name[1] = new->d_inode->i_generation;
1410 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1411 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1412 res_id, LDLM_IBITS, &policy,
1413 LCK_EX, &flags, mds_blocking_ast,
1414 ldlm_completion_ast, NULL, NULL,
1415 NULL, 0, NULL, &lockh);
1419 CDEBUG(D_OTHER, "created dirobj: %lu/%lu mode %o\n",
1420 (unsigned long) new->d_inode->i_ino,
1421 (unsigned long) new->d_inode->i_generation,
1422 (unsigned) new->d_inode->i_mode);
1424 up(&parent_inode->i_sem);
1425 CERROR("%s: can't create dirobj: %d\n", obd->obd_name, rc);
1428 if (rc == 0 && body->oa.o_valid & OBD_MD_FLID) {
1429 /* this is new object for splitted dir. we have to
1430 * prevent recursive splitting on it -bzzz */
1431 mealen = obd_size_diskmd(mds->mds_lmv_exp, NULL);
1432 OBD_ALLOC(mea, mealen);
1434 GOTO(cleanup, rc = -ENOMEM);
1436 down(&new->d_inode->i_sem);
1437 rc = fsfilt_set_md(obd, new->d_inode, handle, mea, mealen);
1438 up(&new->d_inode->i_sem);
1439 OBD_FREE(mea, mealen);
1443 rc = mds_finish_transno(mds, parent_inode, handle, req, rc, 0);
1445 ptlrpc_save_lock(req, &lockh, LCK_EX);
1447 ldlm_lock_decref(&lockh, LCK_EX);
1450 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
1454 static int mdt_get_info(struct ptlrpc_request *req)
1457 struct obd_export *exp = req->rq_export;
1458 int keylen, rc = 0, size = sizeof(obd_id);
1462 key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
1464 DEBUG_REQ(D_HA, req, "no get_info key");
1467 keylen = req->rq_reqmsg->buflens[0];
1469 if (keylen < strlen("mdsize") || memcmp(key, "mdsize", 6) != 0)
1472 rc = lustre_pack_reply(req, 1, &size, NULL);
1476 reply = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply));
1477 rc = obd_get_info(exp, keylen, key, &size, reply);
1478 req->rq_repmsg->status = 0;
1482 static int mds_set_info(struct obd_export *exp, __u32 keylen,
1483 void *key, __u32 vallen, void *val)
1485 struct obd_device *obd;
1486 struct mds_obd *mds;
1490 obd = class_exp2obd(exp);
1492 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1493 exp->exp_handle.h_cookie);
1498 if (keylen == strlen("mds_num") &&
1499 memcmp(key, "mds_num", keylen) == 0) {
1502 CDEBUG(D_IOCTL, "set mds num %d\n", *(int*)val);
1503 mds->mds_num = *(int*)val;
1504 group = FILTER_GROUP_FIRST_MDS + mds->mds_num;
1505 valsize = sizeof(group);
1506 /*mds number has been changed, so the corresponding obdfilter exp
1507 *need to be changed too*/
1508 rc = obd_set_info(mds->mds_osc_exp, strlen("mds_conn"), "mds_conn",
1511 } else if (keylen == strlen("client") &&
1512 memcmp(key, "client", keylen) == 0) {
1513 if (!(exp->exp_flags & OBD_OPT_REAL_CLIENT)) {
1514 atomic_inc(&mds->mds_real_clients);
1515 CDEBUG(D_OTHER,"%s: peer from %s is real client (%d)\n",
1516 obd->obd_name, exp->exp_client_uuid.uuid,
1517 atomic_read(&mds->mds_real_clients));
1518 exp->exp_flags |= OBD_OPT_REAL_CLIENT;
1520 if (mds->mds_lmv_name) {
1521 rc = mds_lmv_connect(obd, mds->mds_lmv_name);
1526 CDEBUG(D_IOCTL, "invalid key\n");
1530 static int mdt_set_info(struct ptlrpc_request *req)
1533 struct obd_export *exp = req->rq_export;
1534 int keylen, rc = 0, vallen;
1537 key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
1539 DEBUG_REQ(D_HA, req, "no set_info key");
1542 keylen = req->rq_reqmsg->buflens[0];
1544 if (keylen == strlen("mds_num") &&
1545 memcmp(key, "mds_num", keylen) == 0) {
1546 rc = lustre_pack_reply(req, 0, NULL, NULL);
1549 val = lustre_msg_buf(req->rq_reqmsg, 1, 0);
1551 vallen = req->rq_reqmsg->buflens[1];
1553 rc = obd_set_info(exp, keylen, key, vallen, val);
1554 req->rq_repmsg->status = 0;
1556 } else if (keylen == strlen("client") &&
1557 memcmp(key, "client", keylen) == 0) {
1558 rc = lustre_pack_reply(req, 0, NULL, NULL);
1561 rc = obd_set_info(exp, keylen, key, sizeof(obd_id), NULL);
1562 req->rq_repmsg->status = 0;
1565 CDEBUG(D_IOCTL, "invalid key\n");
1569 extern int ost_brw_write(struct ptlrpc_request *, struct obd_trans_info *);
1570 int mds_handle(struct ptlrpc_request *req)
1572 int should_process, fail = OBD_FAIL_MDS_ALL_REPLY_NET;
1574 struct mds_obd *mds = NULL; /* quell gcc overwarning */
1575 struct obd_device *obd = NULL;
1578 OBD_FAIL_RETURN(OBD_FAIL_MDS_ALL_REQUEST_NET | OBD_FAIL_ONCE, 0);
1580 LASSERT(current->journal_info == NULL);
1581 /* XXX identical to OST */
1582 if (req->rq_reqmsg->opc != MDS_CONNECT) {
1583 struct mds_export_data *med;
1584 int recovering, abort_recovery;
1586 if (req->rq_export == NULL) {
1587 CERROR("lustre_mds: operation %d on unconnected MDS\n",
1588 req->rq_reqmsg->opc);
1589 req->rq_status = -ENOTCONN;
1590 GOTO(out, rc = -ENOTCONN);
1593 med = &req->rq_export->exp_mds_data;
1594 obd = req->rq_export->exp_obd;
1597 /* sanity check: if the xid matches, the request must
1598 * be marked as a resent or replayed */
1599 if (req->rq_xid == med->med_mcd->mcd_last_xid)
1600 LASSERTF(lustre_msg_get_flags(req->rq_reqmsg) &
1601 (MSG_RESENT | MSG_REPLAY),
1602 "rq_xid "LPU64" matches last_xid, "
1603 "expected RESENT flag\n",
1605 /* else: note the opposite is not always true; a
1606 * RESENT req after a failover will usually not match
1607 * the last_xid, since it was likely never
1608 * committed. A REPLAYed request will almost never
1609 * match the last xid, however it could for a
1610 * committed, but still retained, open. */
1612 /* Check for aborted recovery. */
1613 spin_lock_bh(&obd->obd_processing_task_lock);
1614 abort_recovery = obd->obd_abort_recovery;
1615 recovering = obd->obd_recovering;
1616 spin_unlock_bh(&obd->obd_processing_task_lock);
1617 if (abort_recovery) {
1618 target_abort_recovery(obd);
1619 } else if (recovering) {
1620 rc = mds_filter_recovery_request(req, obd,
1622 if (rc || !should_process)
1627 switch (req->rq_reqmsg->opc) {
1629 DEBUG_REQ(D_INODE, req, "connect");
1630 OBD_FAIL_RETURN(OBD_FAIL_MDS_CONNECT_NET, 0);
1631 rc = target_handle_connect(req, mds_handle);
1633 /* Now that we have an export, set mds. */
1634 mds = mds_req2mds(req);
1637 case MDS_DISCONNECT:
1638 DEBUG_REQ(D_INODE, req, "disconnect");
1639 OBD_FAIL_RETURN(OBD_FAIL_MDS_DISCONNECT_NET, 0);
1640 rc = target_handle_disconnect(req);
1641 req->rq_status = rc; /* superfluous? */
1645 DEBUG_REQ(D_INODE, req, "getstatus");
1646 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETSTATUS_NET, 0);
1647 rc = mds_getstatus(req);
1651 DEBUG_REQ(D_INODE, req, "getattr");
1652 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NET, 0);
1653 rc = mds_getattr(0, req);
1656 case MDS_GETATTR_NAME: {
1657 struct lustre_handle lockh;
1658 DEBUG_REQ(D_INODE, req, "getattr_name");
1659 OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NAME_NET, 0);
1661 /* If this request gets a reconstructed reply, we won't be
1662 * acquiring any new locks in mds_getattr_name, so we don't
1666 rc = mds_getattr_name(0, req, &lockh, MDS_INODELOCK_UPDATE);
1667 /* this non-intent call (from an ioctl) is special */
1668 req->rq_status = rc;
1669 if (rc == 0 && lockh.cookie)
1670 ldlm_lock_decref(&lockh, LCK_PR);
1674 DEBUG_REQ(D_INODE, req, "statfs");
1675 OBD_FAIL_RETURN(OBD_FAIL_MDS_STATFS_NET, 0);
1676 rc = mds_statfs(req);
1680 DEBUG_REQ(D_INODE, req, "readpage");
1681 OBD_FAIL_RETURN(OBD_FAIL_MDS_READPAGE_NET, 0);
1682 rc = mds_readpage(req);
1684 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_SENDPAGE)) {
1685 if (req->rq_reply_state) {
1686 lustre_free_reply_state (req->rq_reply_state);
1687 req->rq_reply_state = NULL;
1695 __u32 *opcp = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*opcp));
1697 int size[3] = {sizeof(struct mds_body), mds->mds_max_mdsize,
1698 mds->mds_max_cookiesize};
1701 /* NB only peek inside req now; mds_reint() will swab it */
1703 CERROR ("Can't inspect opcode\n");
1708 if (lustre_msg_swabbed (req->rq_reqmsg))
1711 DEBUG_REQ(D_INODE, req, "reint %d (%s)", opc,
1712 (opc < sizeof(reint_names) / sizeof(reint_names[0]) ||
1713 reint_names[opc] == NULL) ? reint_names[opc] :
1716 OBD_FAIL_RETURN(OBD_FAIL_MDS_REINT_NET, 0);
1718 if (opc == REINT_UNLINK)
1720 else if (opc == REINT_OPEN || opc == REINT_RENAME)
1725 rc = lustre_pack_reply(req, bufcount, size, NULL);
1729 rc = mds_reint(req, 0, NULL);
1730 fail = OBD_FAIL_MDS_REINT_NET_REP;
1735 DEBUG_REQ(D_INODE, req, "close");
1736 OBD_FAIL_RETURN(OBD_FAIL_MDS_CLOSE_NET, 0);
1737 rc = mds_close(req);
1740 case MDS_DONE_WRITING:
1741 DEBUG_REQ(D_INODE, req, "done_writing");
1742 OBD_FAIL_RETURN(OBD_FAIL_MDS_DONE_WRITING_NET, 0);
1743 rc = mds_done_writing(req);
1747 DEBUG_REQ(D_INODE, req, "pin");
1748 OBD_FAIL_RETURN(OBD_FAIL_MDS_PIN_NET, 0);
1753 DEBUG_REQ(D_INODE, req, "sync");
1754 OBD_FAIL_RETURN(OBD_FAIL_MDS_SYNC_NET, 0);
1759 DEBUG_REQ(D_INODE, req, "ping");
1760 rc = target_handle_ping(req);
1763 case OBD_LOG_CANCEL:
1764 CDEBUG(D_INODE, "log cancel\n");
1765 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1766 rc = -ENOTSUPP; /* la la la */
1770 DEBUG_REQ(D_INODE, req, "enqueue");
1771 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1772 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1773 ldlm_server_blocking_ast, NULL);
1776 DEBUG_REQ(D_INODE, req, "convert");
1777 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1778 rc = ldlm_handle_convert(req);
1780 case LDLM_BL_CALLBACK:
1781 case LDLM_CP_CALLBACK:
1782 DEBUG_REQ(D_INODE, req, "callback");
1783 CERROR("callbacks should not happen on MDS\n");
1785 OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
1787 case LLOG_ORIGIN_HANDLE_CREATE:
1788 DEBUG_REQ(D_INODE, req, "llog_init");
1789 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1790 rc = llog_origin_handle_create(req);
1792 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1793 DEBUG_REQ(D_INODE, req, "llog next block");
1794 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1795 rc = llog_origin_handle_next_block(req);
1797 case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1798 DEBUG_REQ(D_INODE, req, "llog prev block");
1799 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1800 rc = llog_origin_handle_prev_block(req);
1802 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1803 DEBUG_REQ(D_INODE, req, "llog read header");
1804 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1805 rc = llog_origin_handle_read_header(req);
1807 case LLOG_ORIGIN_HANDLE_CLOSE:
1808 DEBUG_REQ(D_INODE, req, "llog close");
1809 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1810 rc = llog_origin_handle_close(req);
1813 DEBUG_REQ(D_INODE, req, "ost_create");
1814 rc = mdt_obj_create(req);
1817 DEBUG_REQ(D_INODE, req, "get_info");
1818 rc = mdt_get_info(req);
1821 DEBUG_REQ(D_INODE, req, "set_info");
1822 rc = mdt_set_info(req);
1825 CDEBUG(D_INODE, "write\n");
1826 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1827 rc = ost_brw_write(req, NULL);
1828 LASSERT(current->journal_info == NULL);
1829 /* mdt_brw sends its own replies */
1833 DEBUG_REQ(D_INODE, req, "llog catinfo");
1834 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1835 rc = llog_catinfo(req);
1838 req->rq_status = -ENOTSUPP;
1839 rc = ptlrpc_error(req);
1843 LASSERT(current->journal_info == NULL);
1847 /* If we're DISCONNECTing, the mds_export_data is already freed */
1848 if (!rc && req->rq_reqmsg->opc != MDS_DISCONNECT) {
1849 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1850 struct obd_device *obd = list_entry(mds, struct obd_device,
1852 req->rq_repmsg->last_xid =
1853 le64_to_cpu(med->med_mcd->mcd_last_xid);
1855 if (!obd->obd_no_transno) {
1856 req->rq_repmsg->last_committed =
1857 obd->obd_last_committed;
1859 DEBUG_REQ(D_IOCTL, req,
1860 "not sending last_committed update");
1862 CDEBUG(D_INFO, "last_transno "LPU64", last_committed "LPU64
1864 mds->mds_last_transno, obd->obd_last_committed,
1869 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) {
1870 if (obd && obd->obd_recovering) {
1871 DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply");
1872 return target_queue_final_reply(req, rc);
1874 /* Lost a race with recovery; let the error path DTRT. */
1875 rc = req->rq_status = -ENOTCONN;
1878 target_send_reply(req, rc, fail);
1882 /* Update the server data on disk. This stores the new mount_count and
1883 * also the last_rcvd value to disk. If we don't have a clean shutdown,
1884 * then the server last_rcvd value may be less than that of the clients.
1885 * This will alert us that we may need to do client recovery.
1887 * Also assumes for mds_last_transno that we are not modifying it (no locking).
1889 int mds_update_server_data(struct obd_device *obd, int force_sync)
1891 struct mds_obd *mds = &obd->u.mds;
1892 struct mds_server_data *msd = mds->mds_server_data;
1893 struct file *filp = mds->mds_rcvd_filp;
1894 struct lvfs_run_ctxt saved;
1899 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1900 msd->msd_last_transno = cpu_to_le64(mds->mds_last_transno);
1902 CDEBUG(D_SUPER, "MDS mount_count is "LPU64", last_transno is "LPU64"\n",
1903 mds->mds_mount_count, mds->mds_last_transno);
1904 rc = fsfilt_write_record(obd, filp, msd, sizeof(*msd), &off,force_sync);
1906 CERROR("error writing MDS server data: rc = %d\n", rc);
1907 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1912 /* mount the file system (secretly) */
1913 static int mds_setup(struct obd_device *obd, obd_count len, void *buf)
1915 struct lustre_cfg* lcfg = buf;
1916 struct mds_obd *mds = &obd->u.mds;
1917 char *options = NULL;
1918 struct vfsmount *mnt;
1923 dev_clear_rdonly(2);
1925 if (!lcfg->lcfg_inlbuf1 || !lcfg->lcfg_inlbuf2)
1926 RETURN(rc = -EINVAL);
1928 obd->obd_fsops = fsfilt_get_ops(lcfg->lcfg_inlbuf2);
1929 if (IS_ERR(obd->obd_fsops))
1930 RETURN(rc = PTR_ERR(obd->obd_fsops));
1932 mds->mds_max_mdsize = sizeof(struct lov_mds_md);
1934 page = __get_free_page(GFP_KERNEL);
1938 options = (char *)page;
1939 memset(options, 0, PAGE_SIZE);
1941 /* here we use "iopen_nopriv" hardcoded, because it affects MDS utility
1942 * and the rest of options are passed by mount options. Probably this
1943 * should be moved to somewhere else like startup scripts or lconf. */
1944 sprintf(options, "iopen_nopriv");
1946 if (lcfg->lcfg_inllen4 > 0 && lcfg->lcfg_inlbuf4)
1947 sprintf(options + strlen(options), ",%s",
1948 lcfg->lcfg_inlbuf4);
1950 /* we have to know mdsnum before touching underlying fs -bzzz */
1951 if (lcfg->lcfg_inllen5 > 0 && lcfg->lcfg_inlbuf5 &&
1952 strcmp(lcfg->lcfg_inlbuf5, "dumb")) {
1955 CDEBUG(D_OTHER, "MDS: %s is master for %s\n",
1956 obd->obd_name, lcfg->lcfg_inlbuf5);
1958 generate_random_uuid(uuid);
1959 class_uuid_unparse(uuid, &mds->mds_lmv_uuid);
1961 OBD_ALLOC(mds->mds_lmv_name, lcfg->lcfg_inllen5);
1962 if (mds->mds_lmv_name == NULL)
1963 RETURN(rc = -ENOMEM);
1965 memcpy(mds->mds_lmv_name, lcfg->lcfg_inlbuf5,
1966 lcfg->lcfg_inllen5);
1968 rc = mds_lmv_connect(obd, mds->mds_lmv_name);
1970 OBD_FREE(mds->mds_lmv_name, lcfg->lcfg_inllen5);
1975 /* FIXME-WANGDI: this should be reworked when we will use lmv along
1976 * with cobd, because correct mdsnum is set in mds_lmv_connect(). */
1977 if (lcfg->lcfg_inllen6 > 0 && lcfg->lcfg_inlbuf6 && !mds->mds_lmv_obd &&
1978 strcmp(lcfg->lcfg_inlbuf6, "dumb")) {
1979 if (!memcmp(lcfg->lcfg_inlbuf6, "master", strlen("master")) &&
1980 mds->mds_num == 0) {
1981 mds->mds_num = REAL_MDS_NUMBER;
1982 } else if (!memcmp(lcfg->lcfg_inlbuf6, "cache", strlen("cache")) &&
1983 mds->mds_num == 0) {
1984 mds->mds_num = CACHE_MDS_NUMBER;
1988 mnt = do_kern_mount(lcfg->lcfg_inlbuf2, 0,
1989 lcfg->lcfg_inlbuf1, options);
1995 CERROR("do_kern_mount failed: rc = %d\n", rc);
1999 CDEBUG(D_SUPER, "%s: mnt = %p\n", lcfg->lcfg_inlbuf1, mnt);
2001 sema_init(&mds->mds_orphan_recovery_sem, 1);
2002 sema_init(&mds->mds_epoch_sem, 1);
2003 spin_lock_init(&mds->mds_transno_lock);
2004 mds->mds_max_cookiesize = sizeof(struct llog_cookie);
2005 atomic_set(&mds->mds_open_count, 0);
2006 atomic_set(&mds->mds_real_clients, 0);
2008 obd->obd_namespace = ldlm_namespace_new(obd->obd_name,
2009 LDLM_NAMESPACE_SERVER);
2010 if (obd->obd_namespace == NULL) {
2011 mds_cleanup(obd, 0);
2012 GOTO(err_put, rc = -ENOMEM);
2014 ldlm_register_intent(obd->obd_namespace, mds_intent_policy);
2016 rc = mds_fs_setup(obd, mnt);
2018 CERROR("MDS filesystem method init failed: rc = %d\n", rc);
2022 rc = llog_start_commit_thread();
2026 if (lcfg->lcfg_inllen3 > 0 && lcfg->lcfg_inlbuf3) {
2029 generate_random_uuid(uuid);
2030 class_uuid_unparse(uuid, &mds->mds_lov_uuid);
2032 OBD_ALLOC(mds->mds_profile, lcfg->lcfg_inllen3);
2033 if (mds->mds_profile == NULL)
2034 GOTO(err_fs, rc = -ENOMEM);
2036 memcpy(mds->mds_profile, lcfg->lcfg_inlbuf3,
2037 lcfg->lcfg_inllen3);
2040 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
2041 "mds_ldlm_client", &obd->obd_ldlm_client);
2042 obd->obd_replayable = 1;
2044 rc = mds_postsetup(obd);
2051 /* No extra cleanup needed for llog_init_commit_thread() */
2052 mds_fs_cleanup(obd, 0);
2054 ldlm_namespace_free(obd->obd_namespace, 0);
2055 obd->obd_namespace = NULL;
2058 mntput(mds->mds_vfsmnt);
2062 fsfilt_put_ops(obd->obd_fsops);
2066 static int mds_postsetup(struct obd_device *obd)
2068 struct mds_obd *mds = &obd->u.mds;
2072 rc = obd_llog_setup(obd, &obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT,
2073 obd, 0, NULL, &llog_lvfs_ops);
2077 /* This check for @dumb string is needed to handle mounting MDS
2078 with smfs. Read lconf:MDSDEV.write_conf() for more detail
2080 if (mds->mds_profile && strcmp(mds->mds_profile, "dumb")) {
2081 struct lvfs_run_ctxt saved;
2082 struct lustre_profile *lprof;
2083 struct config_llog_instance cfg;
2085 cfg.cfg_instance = NULL;
2086 cfg.cfg_uuid = mds->mds_lov_uuid;
2087 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2088 rc = class_config_parse_llog(llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT),
2089 mds->mds_profile, &cfg);
2090 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2094 lprof = class_get_profile(mds->mds_profile);
2095 if (lprof == NULL) {
2096 CERROR("No profile found: %s\n", mds->mds_profile);
2097 GOTO(err_cleanup, rc = -ENOENT);
2099 rc = mds_lov_connect(obd, lprof->lp_osc);
2101 GOTO(err_cleanup, rc);
2103 rc = mds_lmv_postsetup(obd);
2105 GOTO(err_cleanup, rc);
2113 obd_llog_cleanup(llog_get_context(&obd->obd_llogs,
2114 LLOG_CONFIG_ORIG_CTXT));
2118 int mds_postrecov(struct obd_device *obd)
2120 struct mds_obd *mds = &obd->u.mds;
2121 struct llog_ctxt *ctxt;
2125 LASSERT(!obd->obd_recovering);
2126 ctxt = llog_get_context(&obd->obd_llogs, LLOG_UNLINK_ORIG_CTXT);
2127 LASSERT(ctxt != NULL);
2129 /* set nextid first, so we are sure it happens */
2130 rc = mds_lov_set_nextid(obd);
2132 CERROR("%s: mds_lov_set_nextid failed\n", obd->obd_name);
2136 /* clean PENDING dir */
2137 rc = mds_cleanup_orphans(obd);
2142 rc = llog_connect(ctxt, obd->u.mds.mds_lov_desc.ld_tgt_count,
2145 CERROR("%s: failed at llog_origin_connect: %d\n",
2150 /* remove the orphaned precreated objects */
2151 rc = mds_lov_clearorphans(mds, NULL /* all OSTs */);
2156 RETURN(rc < 0 ? rc : item);
2159 /* cleanup all llogging subsystems */
2160 rc = obd_llog_finish(obd, &obd->obd_llogs,
2161 mds->mds_lov_desc.ld_tgt_count);
2163 CERROR("%s: failed to cleanup llogging subsystems\n",
2168 int mds_lov_clean(struct obd_device *obd)
2170 struct mds_obd *mds = &obd->u.mds;
2172 if (mds->mds_profile) {
2174 struct config_llog_instance cfg;
2175 struct lvfs_run_ctxt saved;
2176 int len = strlen(mds->mds_profile) + sizeof("-clean") + 1;
2178 OBD_ALLOC(cln_prof, len);
2179 sprintf(cln_prof, "%s-clean", mds->mds_profile);
2181 cfg.cfg_instance = NULL;
2182 cfg.cfg_uuid = mds->mds_lov_uuid;
2184 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2185 class_config_parse_llog(llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT),
2187 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2189 OBD_FREE(cln_prof, len);
2190 OBD_FREE(mds->mds_profile, strlen(mds->mds_profile) + 1);
2191 mds->mds_profile = NULL;
2196 int mds_lmv_clean(struct obd_device *obd)
2198 struct mds_obd *mds = &obd->u.mds;
2200 if (mds->mds_lmv_name) {
2201 OBD_FREE(mds->mds_lmv_name, strlen(mds->mds_lmv_name) + 1);
2202 mds->mds_lmv_name = NULL;
2207 static int mds_precleanup(struct obd_device *obd, int flags)
2213 mds_lov_disconnect(obd, flags);
2215 obd_llog_cleanup(llog_get_context(&obd->obd_llogs, LLOG_CONFIG_ORIG_CTXT));
2219 static int mds_cleanup(struct obd_device *obd, int flags)
2221 struct mds_obd *mds = &obd->u.mds;
2224 if (mds->mds_sb == NULL)
2227 mds_update_server_data(obd, 1);
2228 if (mds->mds_lov_objids != NULL) {
2229 OBD_FREE(mds->mds_lov_objids,
2230 mds->mds_lov_desc.ld_tgt_count * sizeof(obd_id));
2232 mds_fs_cleanup(obd, flags);
2236 /* 2 seems normal on mds, (may_umount() also expects 2
2237 fwiw), but we only see 1 at this point in obdfilter. */
2238 if (atomic_read(&obd->u.mds.mds_vfsmnt->mnt_count) > 2)
2239 CERROR("%s: mount busy, mnt_count %d != 2\n", obd->obd_name,
2240 atomic_read(&obd->u.mds.mds_vfsmnt->mnt_count));
2242 mntput(mds->mds_vfsmnt);
2246 ldlm_namespace_free(obd->obd_namespace, flags & OBD_OPT_FORCE);
2248 spin_lock_bh(&obd->obd_processing_task_lock);
2249 if (obd->obd_recovering) {
2250 target_cancel_recovery_timer(obd);
2251 obd->obd_recovering = 0;
2253 spin_unlock_bh(&obd->obd_processing_task_lock);
2256 dev_clear_rdonly(2);
2257 fsfilt_put_ops(obd->obd_fsops);
2262 static void fixup_handle_for_resent_req(struct ptlrpc_request *req,
2263 struct ldlm_lock *new_lock,
2264 struct lustre_handle *lockh)
2266 struct obd_export *exp = req->rq_export;
2267 struct obd_device *obd = exp->exp_obd;
2268 struct ldlm_request *dlmreq =
2269 lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*dlmreq));
2270 struct lustre_handle remote_hdl = dlmreq->lock_handle1;
2271 struct list_head *iter;
2273 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
2276 l_lock(&obd->obd_namespace->ns_lock);
2277 list_for_each(iter, &exp->exp_ldlm_data.led_held_locks) {
2278 struct ldlm_lock *lock;
2279 lock = list_entry(iter, struct ldlm_lock, l_export_chain);
2280 if (lock == new_lock)
2282 if (lock->l_remote_handle.cookie == remote_hdl.cookie) {
2283 lockh->cookie = lock->l_handle.h_cookie;
2284 DEBUG_REQ(D_HA, req, "restoring lock cookie "LPX64,
2286 l_unlock(&obd->obd_namespace->ns_lock);
2290 l_unlock(&obd->obd_namespace->ns_lock);
2292 /* If the xid matches, then we know this is a resent request,
2293 * and allow it. (It's probably an OPEN, for which we don't
2295 if (req->rq_xid == exp->exp_mds_data.med_mcd->mcd_last_xid)
2298 /* This remote handle isn't enqueued, so we never received or
2299 * processed this request. Clear MSG_RESENT, because it can
2300 * be handled like any normal request now. */
2302 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
2304 DEBUG_REQ(D_HA, req, "no existing lock with rhandle "LPX64,
2308 int intent_disposition(struct ldlm_reply *rep, int flag)
2312 return (rep->lock_policy_res1 & flag);
2315 void intent_set_disposition(struct ldlm_reply *rep, int flag)
2319 rep->lock_policy_res1 |= flag;
2322 static int mds_intent_policy(struct ldlm_namespace *ns,
2323 struct ldlm_lock **lockp, void *req_cookie,
2324 ldlm_mode_t mode, int flags, void *data)
2326 struct ptlrpc_request *req = req_cookie;
2327 struct ldlm_lock *lock = *lockp;
2328 struct ldlm_intent *it;
2329 struct mds_obd *mds = &req->rq_export->exp_obd->u.mds;
2330 struct ldlm_reply *rep;
2331 struct lustre_handle lockh = { 0 };
2332 struct ldlm_lock *new_lock;
2333 int getattr_part = MDS_INODELOCK_UPDATE;
2334 int rc, offset = 2, repsize[4] = {sizeof(struct ldlm_reply),
2335 sizeof(struct mds_body),
2336 mds->mds_max_mdsize,
2337 mds->mds_max_cookiesize};
2340 LASSERT(req != NULL);
2342 if (req->rq_reqmsg->bufcount <= 1) {
2343 /* No intent was provided */
2344 int size = sizeof(struct ldlm_reply);
2345 rc = lustre_pack_reply(req, 1, &size, NULL);
2350 it = lustre_swab_reqbuf(req, 1, sizeof(*it), lustre_swab_ldlm_intent);
2352 CERROR("Intent missing\n");
2353 RETURN(req->rq_status = -EFAULT);
2356 LDLM_DEBUG(lock, "intent policy, opc: %s", ldlm_it2str(it->opc));
2358 rc = lustre_pack_reply(req, it->opc == IT_UNLINK ? 4 : 3, repsize,
2361 RETURN(req->rq_status = rc);
2363 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
2364 intent_set_disposition(rep, DISP_IT_EXECD);
2366 fixup_handle_for_resent_req(req, lock, &lockh);
2368 /* execute policy */
2369 switch ((long)it->opc) {
2371 case IT_CREAT|IT_OPEN:
2372 /* XXX swab here to assert that an mds_open reint
2373 * packet is following */
2374 rep->lock_policy_res2 = mds_reint(req, offset, &lockh);
2376 /* We abort the lock if the lookup was negative and
2377 * we did not make it to the OPEN portion */
2378 if (!intent_disposition(rep, DISP_LOOKUP_EXECD))
2379 RETURN(ELDLM_LOCK_ABORTED);
2380 if (intent_disposition(rep, DISP_LOOKUP_NEG) &&
2381 !intent_disposition(rep, DISP_OPEN_OPEN))
2383 if (rep->lock_policy_res2) {
2384 /* mds_open returns ENOLCK where it
2385 * should return zero, but it has no
2387 if (rep->lock_policy_res2 == ENOLCK)
2388 rep->lock_policy_res2 = 0;
2389 RETURN(ELDLM_LOCK_ABORTED);
2393 getattr_part = MDS_INODELOCK_LOOKUP;
2396 getattr_part |= MDS_INODELOCK_LOOKUP;
2398 rep->lock_policy_res2 = mds_getattr_name(offset, req, &lockh,
2400 /* FIXME: LDLM can set req->rq_status. MDS sets
2401 policy_res{1,2} with disposition and status.
2402 - replay: returns 0 & req->status is old status
2403 - otherwise: returns req->status */
2404 if (intent_disposition(rep, DISP_LOOKUP_NEG))
2405 rep->lock_policy_res2 = 0;
2406 if (!intent_disposition(rep, DISP_LOOKUP_POS) ||
2407 rep->lock_policy_res2)
2408 RETURN(ELDLM_LOCK_ABORTED);
2409 if (req->rq_status != 0) {
2411 rep->lock_policy_res2 = req->rq_status;
2412 RETURN(ELDLM_LOCK_ABORTED);
2416 CERROR("Unhandled intent "LPD64"\n", it->opc);
2420 /* By this point, whatever function we called above must have either
2421 * filled in 'lockh', been an intent replay, or returned an error. We
2422 * want to allow replayed RPCs to not get a lock, since we would just
2423 * drop it below anyways because lock replay is done separately by the
2424 * client afterwards. For regular RPCs we want to give the new lock to
2425 * the client instead of whatever lock it was about to get. */
2426 new_lock = ldlm_handle2lock(&lockh);
2427 if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY))
2430 LASSERT(new_lock != NULL);
2432 /* If we've already given this lock to a client once, then we should
2433 * have no readers or writers. Otherwise, we should have one reader
2434 * _or_ writer ref (which will be zeroed below) before returning the
2435 * lock to a client. */
2436 if (new_lock->l_export == req->rq_export) {
2437 LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
2439 LASSERT(new_lock->l_export == NULL);
2440 LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
2445 if (new_lock->l_export == req->rq_export) {
2446 /* Already gave this to the client, which means that we
2447 * reconstructed a reply. */
2448 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
2450 RETURN(ELDLM_LOCK_REPLACED);
2453 /* Fixup the lock to be given to the client */
2454 l_lock(&new_lock->l_resource->lr_namespace->ns_lock);
2455 new_lock->l_readers = 0;
2456 new_lock->l_writers = 0;
2458 new_lock->l_export = class_export_get(req->rq_export);
2459 list_add(&new_lock->l_export_chain,
2460 &new_lock->l_export->exp_ldlm_data.led_held_locks);
2462 new_lock->l_blocking_ast = lock->l_blocking_ast;
2463 new_lock->l_completion_ast = lock->l_completion_ast;
2465 memcpy(&new_lock->l_remote_handle, &lock->l_remote_handle,
2466 sizeof(lock->l_remote_handle));
2468 new_lock->l_flags &= ~LDLM_FL_LOCAL;
2470 LDLM_LOCK_PUT(new_lock);
2471 l_unlock(&new_lock->l_resource->lr_namespace->ns_lock);
2473 RETURN(ELDLM_LOCK_REPLACED);
2476 int mds_attach(struct obd_device *dev, obd_count len, void *data)
2478 struct lprocfs_static_vars lvars;
2480 lprocfs_init_multi_vars(0, &lvars);
2481 return lprocfs_obd_attach(dev, lvars.obd_vars);
2484 int mds_detach(struct obd_device *dev)
2486 return lprocfs_obd_detach(dev);
2489 int mdt_attach(struct obd_device *dev, obd_count len, void *data)
2491 struct lprocfs_static_vars lvars;
2493 lprocfs_init_multi_vars(1, &lvars);
2494 return lprocfs_obd_attach(dev, lvars.obd_vars);
2497 int mdt_detach(struct obd_device *dev)
2499 return lprocfs_obd_detach(dev);
2502 static int mdt_setup(struct obd_device *obd, obd_count len, void *buf)
2504 struct mds_obd *mds = &obd->u.mds;
2509 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2510 MDS_REQUEST_PORTAL, MDC_REPLY_PORTAL,
2511 mds_handle, "mds", obd->obd_proc_entry);
2513 if (!mds->mds_service) {
2514 CERROR("failed to start service\n");
2518 rc = ptlrpc_start_n_threads(obd, mds->mds_service, MDT_NUM_THREADS,
2521 GOTO(err_thread, rc);
2523 mds->mds_setattr_service =
2524 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2525 MDS_SETATTR_PORTAL, MDC_REPLY_PORTAL,
2526 mds_handle, "mds_setattr",
2527 obd->obd_proc_entry);
2528 if (!mds->mds_setattr_service) {
2529 CERROR("failed to start getattr service\n");
2530 GOTO(err_thread, rc = -ENOMEM);
2533 rc = ptlrpc_start_n_threads(obd, mds->mds_setattr_service,
2534 MDT_NUM_THREADS, "ll_mdt_attr");
2536 GOTO(err_thread2, rc);
2538 mds->mds_readpage_service =
2539 ptlrpc_init_svc(MDS_NBUFS, MDS_BUFSIZE, MDS_MAXREQSIZE,
2540 MDS_READPAGE_PORTAL, MDC_REPLY_PORTAL,
2541 mds_handle, "mds_readpage",
2542 obd->obd_proc_entry);
2543 if (!mds->mds_readpage_service) {
2544 CERROR("failed to start readpage service\n");
2545 GOTO(err_thread2, rc = -ENOMEM);
2548 rc = ptlrpc_start_n_threads(obd, mds->mds_readpage_service,
2549 MDT_NUM_THREADS, "ll_mdt_rdpg");
2552 GOTO(err_thread3, rc);
2557 ptlrpc_unregister_service(mds->mds_readpage_service);
2559 ptlrpc_unregister_service(mds->mds_setattr_service);
2561 ptlrpc_unregister_service(mds->mds_service);
2565 static int mdt_cleanup(struct obd_device *obd, int flags)
2567 struct mds_obd *mds = &obd->u.mds;
2570 ptlrpc_stop_all_threads(mds->mds_readpage_service);
2571 ptlrpc_unregister_service(mds->mds_readpage_service);
2573 ptlrpc_stop_all_threads(mds->mds_setattr_service);
2574 ptlrpc_unregister_service(mds->mds_setattr_service);
2576 ptlrpc_stop_all_threads(mds->mds_service);
2577 ptlrpc_unregister_service(mds->mds_service);
2582 static struct dentry *mds_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
2585 struct obd_device *obd = data;
2588 fid.generation = gen;
2589 return mds_fid2dentry(&obd->u.mds, &fid, NULL);
2592 static int mds_get_info(struct obd_export *exp, __u32 keylen,
2593 void *key, __u32 *vallen, void *val)
2595 struct obd_device *obd;
2596 struct mds_obd *mds;
2599 obd = class_exp2obd(exp);
2601 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
2602 exp->exp_handle.h_cookie);
2606 if (keylen >= strlen("reint_log") && memcmp(key, "reint_log", 9) == 0) {
2607 /*Get log_context handle*/
2608 unsigned long *llh_handle = val;
2609 *vallen = sizeof(unsigned long);
2610 *llh_handle = (unsigned long)obd->obd_llog_ctxt[LLOG_REINT_ORIG_CTXT];
2613 if (keylen >= strlen("cache_sb") && memcmp(key, "cache_sb", 8) == 0) {
2614 /*Get log_context handle*/
2615 unsigned long *sb = val;
2616 *vallen = sizeof(unsigned long);
2617 *sb = (unsigned long)obd->u.mds.mds_sb;
2622 keylen == strlen("mdsize");
2623 if (keylen && memcmp(key, "mdsize", keylen) == 0) {
2624 __u32 *mdsize = val;
2625 *vallen = sizeof(*mdsize);
2626 *mdsize = mds->mds_max_mdsize;
2630 CDEBUG(D_IOCTL, "invalid key\n");
2634 struct lvfs_callback_ops mds_lvfs_ops = {
2635 l_fid2dentry: mds_lvfs_fid2dentry,
2638 int mds_preprw(int cmd, struct obd_export *exp, struct obdo *oa,
2639 int objcount, struct obd_ioobj *obj,
2640 int niocount, struct niobuf_remote *nb,
2641 struct niobuf_local *res,
2642 struct obd_trans_info *oti);
2643 int mds_commitrw(int cmd, struct obd_export *exp, struct obdo *oa,
2644 int objcount, struct obd_ioobj *obj, int niocount,
2645 struct niobuf_local *res, struct obd_trans_info *oti,
2648 /* use obd ops to offer management infrastructure */
2649 static struct obd_ops mds_obd_ops = {
2650 .o_owner = THIS_MODULE,
2651 .o_attach = mds_attach,
2652 .o_detach = mds_detach,
2653 .o_connect = mds_connect,
2654 .o_init_export = mds_init_export,
2655 .o_destroy_export = mds_destroy_export,
2656 .o_disconnect = mds_disconnect,
2657 .o_setup = mds_setup,
2658 .o_precleanup = mds_precleanup,
2659 .o_cleanup = mds_cleanup,
2660 .o_postrecov = mds_postrecov,
2661 .o_statfs = mds_obd_statfs,
2662 .o_iocontrol = mds_iocontrol,
2663 .o_create = mds_obd_create,
2664 .o_destroy = mds_obd_destroy,
2665 .o_llog_init = mds_llog_init,
2666 .o_llog_finish = mds_llog_finish,
2667 .o_notify = mds_notify,
2668 .o_get_info = mds_get_info,
2669 .o_set_info = mds_set_info,
2670 .o_preprw = mds_preprw,
2671 .o_commitrw = mds_commitrw,
2674 static struct obd_ops mdt_obd_ops = {
2675 .o_owner = THIS_MODULE,
2676 .o_attach = mdt_attach,
2677 .o_detach = mdt_detach,
2678 .o_setup = mdt_setup,
2679 .o_cleanup = mdt_cleanup,
2680 .o_attach = mdt_attach,
2681 .o_detach = mdt_detach,
2684 static int __init mds_init(void)
2686 struct lprocfs_static_vars lvars;
2688 lprocfs_init_multi_vars(0, &lvars);
2689 class_register_type(&mds_obd_ops, NULL, lvars.module_vars,
2691 lprocfs_init_multi_vars(1, &lvars);
2692 class_register_type(&mdt_obd_ops, NULL, lvars.module_vars,
2698 static void /*__exit*/ mds_exit(void)
2700 class_unregister_type(LUSTRE_MDS_NAME);
2701 class_unregister_type(LUSTRE_MDT_NAME);
2704 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2705 MODULE_DESCRIPTION("Lustre Metadata Server (MDS)");
2706 MODULE_LICENSE("GPL");
2708 module_init(mds_init);
2709 module_exit(mds_exit);