1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2003 Cluster File Systems, Inc.
5 * Author: Peter Braam <braam@clusterfs.com>
6 * Author: Andreas Dilger <adilger@clusterfs.com>
7 * Author: Phil Schwan <phil@clusterfs.com>
8 * Author: Mike Shaver <shaver@clusterfs.com>
10 * This file is part of Lustre, http://www.lustre.org.
12 * Lustre is free software; you can redistribute it and/or
13 * modify it under the terms of version 2 of the GNU General Public
14 * License as published by the Free Software Foundation.
16 * Lustre is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with Lustre; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 # define EXPORT_SYMTAB
29 #define DEBUG_SUBSYSTEM S_MDS
31 #include <linux/version.h>
32 #include <linux/module.h>
33 #include <linux/init.h>
34 #include <linux/version.h>
35 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
36 # include <linux/buffer_head.h>
37 # include <linux/workqueue.h>
39 # include <linux/locks.h>
42 #include <linux/obd_class.h>
43 #include <linux/obd_lov.h>
44 #include <linux/lustre_fsfilt.h>
45 #include <linux/lprocfs_status.h>
47 #include "mds_internal.h"
49 /* Exported function from this file are:
51 * mds_open - called by the intent handler
52 * mds_close - an rpc handling function
53 * mds_pin - an rpc handling function - which will go away
54 * mds_mfd_close - for force closing files when a client dies
58 * MDS file data handling: file data holds a handle for a file opened
62 static void mds_mfd_addref(void *mfdp)
64 struct mds_file_data *mfd = mfdp;
66 atomic_inc(&mfd->mfd_refcount);
67 CDEBUG(D_INFO, "GETting mfd %p : new refcount %d\n", mfd,
68 atomic_read(&mfd->mfd_refcount));
71 struct mds_file_data *mds_mfd_new(void)
73 struct mds_file_data *mfd;
75 OBD_ALLOC(mfd, sizeof *mfd);
77 CERROR("mds: out of memory\n");
81 atomic_set(&mfd->mfd_refcount, 2);
83 INIT_LIST_HEAD(&mfd->mfd_handle.h_link);
84 class_handle_hash(&mfd->mfd_handle, mds_mfd_addref);
89 static struct mds_file_data *mds_handle2mfd(struct lustre_handle *handle)
92 LASSERT(handle != NULL);
93 RETURN(class_handle2object(handle->cookie));
96 static void mds_mfd_put(struct mds_file_data *mfd)
98 CDEBUG(D_INFO, "PUTting mfd %p : new refcount %d\n", mfd,
99 atomic_read(&mfd->mfd_refcount) - 1);
100 LASSERT(atomic_read(&mfd->mfd_refcount) > 0 &&
101 atomic_read(&mfd->mfd_refcount) < 0x5a5a);
102 if (atomic_dec_and_test(&mfd->mfd_refcount)) {
103 LASSERT(list_empty(&mfd->mfd_handle.h_link));
104 OBD_FREE(mfd, sizeof *mfd);
108 static void mds_mfd_destroy(struct mds_file_data *mfd)
110 class_handle_unhash(&mfd->mfd_handle);
114 /* Caller must hold mds->mds_epoch_sem */
115 static int mds_alloc_filterdata(struct inode *inode)
117 LASSERT(LUSTRE_FILTERDATA(inode) == NULL);
118 OBD_ALLOC(LUSTRE_FILTERDATA(inode), sizeof(struct mds_filter_data));
119 if (LUSTRE_FILTERDATA(inode) == NULL)
121 LASSERT(igrab(inode) == inode);
125 /* Caller must hold mds->mds_epoch_sem */
126 static void mds_free_filterdata(struct inode *inode)
128 LASSERT(LUSTRE_FILTERDATA(inode) != NULL);
129 OBD_FREE(LUSTRE_FILTERDATA(inode), sizeof(struct mds_filter_data));
130 LUSTRE_FILTERDATA(inode) = NULL;
134 /* Write access to a file: executors cause a negative count,
135 * writers a positive count. The semaphore is needed to perform
136 * a check for the sign and then increment or decrement atomically.
138 * This code is closely tied to the allocation of the d_fsdata and the
139 * MDS epoch, so we use the same semaphore for the whole lot.
141 * We could use a different semaphore for each file, if it ever shows
142 * up in a profile, which it won't.
144 * epoch argument is nonzero during recovery */
145 static int mds_get_write_access(struct mds_obd *mds, struct inode *inode,
150 down(&mds->mds_epoch_sem);
152 if (atomic_read(&inode->i_writecount) < 0) {
153 up(&mds->mds_epoch_sem);
157 if (MDS_FILTERDATA(inode) && MDS_FILTERDATA(inode)->io_epoch != 0) {
158 CDEBUG(D_INODE, "continuing MDS epoch "LPU64" for ino %lu/%u\n",
159 MDS_FILTERDATA(inode)->io_epoch, inode->i_ino,
160 inode->i_generation);
164 if (MDS_FILTERDATA(inode) == NULL)
165 mds_alloc_filterdata(inode);
166 if (MDS_FILTERDATA(inode) == NULL) {
170 if (epoch > mds->mds_io_epoch)
171 mds->mds_io_epoch = epoch;
174 MDS_FILTERDATA(inode)->io_epoch = mds->mds_io_epoch;
175 CDEBUG(D_INODE, "starting MDS epoch "LPU64" for ino %lu/%u\n",
176 mds->mds_io_epoch, inode->i_ino, inode->i_generation);
179 atomic_inc(&inode->i_writecount);
180 up(&mds->mds_epoch_sem);
184 /* Returns EAGAIN if the client needs to get size and/or cookies and close
185 * again -- which is never true if the file is about to be unlinked. Otherwise
186 * returns the number of remaining writers. */
187 static int mds_put_write_access(struct mds_obd *mds, struct inode *inode,
188 struct mds_body *body, int unlinking)
193 down(&mds->mds_epoch_sem);
194 atomic_dec(&inode->i_writecount);
195 rc = atomic_read(&inode->i_writecount);
199 if (!unlinking && !(body->valid & OBD_MD_FLSIZE))
200 GOTO(out, rc = EAGAIN);
202 mds_free_filterdata(inode);
204 up(&mds->mds_epoch_sem);
208 static int mds_deny_write_access(struct mds_obd *mds, struct inode *inode)
211 down(&mds->mds_epoch_sem);
212 if (atomic_read(&inode->i_writecount) > 0) {
213 up(&mds->mds_epoch_sem);
216 atomic_dec(&inode->i_writecount);
217 up(&mds->mds_epoch_sem);
221 static void mds_allow_write_access(struct inode *inode)
224 atomic_inc(&inode->i_writecount);
227 int mds_query_write_access(struct inode *inode)
230 RETURN(atomic_read(&inode->i_writecount));
233 /* This replaces the VFS dentry_open, it manages mfd and writecount */
234 static struct mds_file_data *mds_dentry_open(struct dentry *dentry,
235 struct vfsmount *mnt, int flags,
236 struct ptlrpc_request *req)
238 struct mds_export_data *med = &req->rq_export->exp_mds_data;
239 struct mds_obd *mds = mds_req2mds(req);
240 struct mds_file_data *mfd;
241 struct mds_body *body;
247 CERROR("mds: out of memory\n");
248 GOTO(cleanup_dentry, rc = -ENOMEM);
251 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
253 if (flags & FMODE_WRITE) {
254 /* FIXME: in recovery, need to pass old epoch here */
255 rc = mds_get_write_access(mds, dentry->d_inode, 0);
257 GOTO(cleanup_mfd, rc);
258 body->io_epoch = MDS_FILTERDATA(dentry->d_inode)->io_epoch;
259 } else if (flags & FMODE_EXEC) {
260 rc = mds_deny_write_access(mds, dentry->d_inode);
262 GOTO(cleanup_mfd, rc);
267 /* FIXME: invalidate update locks when first open for write comes in */
269 /* mark the file as open to handle open-unlink. */
270 DOWN_WRITE_I_ALLOC_SEM(dentry->d_inode);
271 mds_orphan_open_inc(dentry->d_inode);
272 UP_WRITE_I_ALLOC_SEM(dentry->d_inode);
274 mfd->mfd_mode = flags;
275 mfd->mfd_dentry = dentry;
276 mfd->mfd_xid = req->rq_xid;
278 spin_lock(&med->med_open_lock);
279 list_add(&mfd->mfd_list, &med->med_open_head);
280 spin_unlock(&med->med_open_lock);
283 body->handle.cookie = mfd->mfd_handle.h_cookie;
287 mds_mfd_destroy(mfd);
293 mds_objids_from_lmm(obd_id *ids, struct lov_mds_md *lmm,
294 struct lov_desc *desc)
298 for (i = 0; i < le32_to_cpu(lmm->lmm_stripe_count); i++) {
299 ids[le32_to_cpu(lmm->lmm_objects[i].l_ost_idx)] =
300 le64_to_cpu(lmm->lmm_objects[i].l_object_id);
304 /* must be called with i_sem held */
306 mds_create_objects(struct obd_device *obd, struct ptlrpc_request *req,
307 int offset, struct mds_update_record *rec,
308 struct dentry *dchild, void **handle,
311 struct inode *inode = dchild->d_inode;
312 struct mds_obd *mds = &obd->u.mds;
313 struct obd_trans_info oti = { 0 };
314 struct lov_stripe_md *lsm = NULL;
315 struct lov_mds_md *lmm = NULL;
316 int rc, lmm_bufsize, lmm_size;
317 struct obdo *oa = NULL;
318 struct mds_body *body;
322 if (rec->ur_flags & MDS_OPEN_DELAY_CREATE ||
323 !(rec->ur_flags & FMODE_WRITE))
326 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*body));
328 if (!S_ISREG(inode->i_mode))
330 if (body->valid & OBD_MD_FLEASIZE)
333 OBD_ALLOC(*ids, mds->mds_dt_desc.ld_tgt_count * sizeof(**ids));
336 oti.oti_objid = *ids;
339 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
340 LASSERT(id_ino(rec->ur_id2));
341 body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
342 lmm_size = rec->ur_eadatalen;
343 lmm = rec->ur_eadata;
347 *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
348 if (IS_ERR(*handle)) {
349 rc = PTR_ERR(*handle);
354 mds_objids_from_lmm(*ids, lmm, &mds->mds_dt_desc);
356 lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
357 lmm_bufsize = req->rq_repmsg->buflens[offset];
358 LASSERT(lmm_buf != NULL);
359 LASSERT(lmm_bufsize >= lmm_size);
361 memcpy(lmm_buf, lmm, lmm_size);
362 rc = fsfilt_set_md(obd, inode, *handle, lmm,
365 CERROR("open replay failed to set md:%d\n", rc);
369 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_ALLOC_OBDO))
375 oa->o_mode = S_IFREG | 0600;
376 oa->o_id = inode->i_ino;
377 oa->o_gr = FILTER_GROUP_FIRST_MDS + mds->mds_num;
378 oa->o_generation = inode->i_generation;
379 oa->o_uid = 0; /* must have 0 uid / gid on OST */
381 oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE |
382 OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLGROUP;
385 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
386 OBD_MD_FLMTIME | OBD_MD_FLCTIME);
388 if (!(rec->ur_flags & MDS_OPEN_HAS_OBJS)) {
389 /* check if things like lfs setstripe are sending us the ea */
390 if (rec->ur_flags & MDS_OPEN_HAS_EA) {
391 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
393 0, &lsm, rec->ur_eadata);
397 OBD_ALLOC(lmm, mds->mds_max_mdsize);
399 GOTO(out_oa, rc = -ENOMEM);
401 lmm_size = mds->mds_max_mdsize;
402 rc = mds_get_md(obd, dchild->d_parent->d_inode,
403 lmm, &lmm_size, 1, 0);
405 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
408 OBD_FREE(lmm, mds->mds_max_mdsize);
413 LASSERT(oa->o_gr >= FILTER_GROUP_FIRST_MDS);
414 oti.oti_flags |= OBD_MODE_CROW;
415 rc = obd_create(mds->mds_dt_exp, oa, NULL, 0, &lsm, &oti);
418 CDEBUG((rc == -ENOSPC ? D_INODE : D_ERROR),
419 "error creating objects for "
420 "inode %lu: rc = %d\n",
423 CERROR("obd_create returned invalid "
430 rc = obd_iocontrol(OBD_IOC_LOV_SETEA, mds->mds_dt_exp,
431 0, &lsm, rec->ur_eadata);
435 lsm->lsm_object_id = oa->o_id;
436 lsm->lsm_object_gr = oa->o_gr;
439 oa->o_size = inode->i_size;
440 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
441 OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLSIZE);
443 rc = obd_setattr(mds->mds_dt_exp, oa, lsm, &oti);
445 CERROR("error setting attrs for inode %lu: rc %d\n",
448 CERROR("obd_setattr returned bad rc %d\n", rc);
455 body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
456 obdo_refresh_inode(inode, oa, OBD_MD_FLBLKSZ);
458 LASSERT(lsm && lsm->lsm_object_id);
460 rc = obd_packmd(mds->mds_dt_exp, &lmm, lsm);
461 if (!id_ino(rec->ur_id2))
462 obd_free_memmd(mds->mds_dt_exp, &lsm);
464 CERROR("cannot pack lsm, err = %d\n", rc);
469 body->eadatasize = rc;
472 *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
473 if (IS_ERR(*handle)) {
474 rc = PTR_ERR(*handle);
479 rc = fsfilt_set_md(obd, inode, *handle, lmm,
482 lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
483 lmm_bufsize = req->rq_repmsg->buflens[offset];
485 LASSERT(lmm_bufsize >= lmm_size);
487 memcpy(lmm_buf, lmm, lmm_size);
488 obd_free_diskmd(mds->mds_dt_exp, &lmm);
490 oti_free_cookies(&oti);
494 obd_free_memmd(mds->mds_dt_exp, &lsm);
499 mds_destroy_object(struct obd_device *obd,
500 struct inode *inode, int async)
502 struct mds_obd *mds = &obd->u.mds;
503 struct lov_mds_md *lmm = NULL;
507 LASSERT(inode != NULL);
509 if (inode->i_nlink != 0) {
510 CDEBUG(D_INODE, "attempt to destroy OSS object when "
511 "i_nlink == %d\n", (int)inode->i_nlink);
515 OBD_ALLOC(lmm, mds->mds_max_mdsize);
519 lmm_size = mds->mds_max_mdsize;
520 rc = mds_get_md(obd, inode, lmm, &lmm_size, 1, 0);
522 CERROR("no stripe info for %lu/%lu inode\n",
523 (unsigned long)inode->i_ino,
524 (unsigned long)inode->i_generation);
525 GOTO(out_free_lmm, rc);
529 /* asynchronously unlink objecect on OSS */
530 rc = mds_unlink_object(mds, inode, lmm, lmm_size,
533 CERROR("error unlinking object on OSS, "
535 GOTO(out_free_lmm, rc);
538 CDEBUG(D_INODE, "no stripping info found for inode "
539 "%lu/%lu\n", (unsigned long)inode->i_ino,
540 (unsigned long)inode->i_generation);
544 OBD_FREE(lmm, mds->mds_max_mdsize);
548 static void reconstruct_open(struct mds_update_record *rec, int offset,
549 struct ptlrpc_request *req,
550 struct lustre_handle *child_lockh)
552 struct mds_export_data *med = &req->rq_export->exp_mds_data;
553 struct mds_client_data *mcd = med->med_mcd;
554 struct mds_obd *mds = mds_req2mds(req);
555 struct mds_file_data *mfd;
556 struct obd_device *obd = req->rq_export->exp_obd;
557 struct dentry *parent = NULL, *dchild;
558 struct ldlm_reply *rep;
559 struct mds_body *body;
565 LASSERT(offset == 3); /* only called via intent */
566 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
567 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
569 /* copy rc, transno and disp; steal locks */
570 mds_req_from_mcd(req, mcd);
571 intent_set_disposition(rep, mcd->mcd_last_data);
573 /* Only replay if create or open actually happened. */
574 if (!intent_disposition(rep, DISP_OPEN_CREATE | DISP_OPEN_OPEN) ) {
576 return; /* error looking up parent or child */
579 if (rec->ur_namelen == 1) {
580 CDEBUG(D_HA, "OPEN by fid "DLID4" (RESENT)\n",
582 dchild = mds_id2dentry(obd, rec->ur_id1, NULL);
584 parent = mds_id2dentry(obd, rec->ur_id1, NULL);
585 LASSERTF(!IS_ERR(parent), "lid "DLID4" rc %ld\n",
586 OLID4(rec->ur_id1), PTR_ERR(parent));
587 dchild = ll_lookup_one_len(rec->ur_name, parent,
588 rec->ur_namelen - 1);
589 LASSERTF(!IS_ERR(dchild), "parent "DLID4" child %s rc %ld\n",
590 OLID4(rec->ur_id1), rec->ur_name, PTR_ERR(dchild));
593 if (!dchild->d_inode)
594 GOTO(out_dput, 0); /* child not present to open */
596 /* At this point, we know we have a child. We'll send
597 * it back _unless_ it not created and open failed. */
598 if (intent_disposition(rep, DISP_OPEN_OPEN) &&
599 !intent_disposition(rep, DISP_OPEN_CREATE) &&
603 /* get lock (write for O_CREAT, read otherwise) */
604 mds_pack_inode2body(obd, body, dchild->d_inode, 1);
605 if (S_ISREG(dchild->d_inode->i_mode)) {
606 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
607 dchild->d_inode, 1, 0);
610 LASSERT(rc == req->rq_status);
612 /* If we have LOV EA data, the OST holds size, mtime */
613 if (!(body->valid & OBD_MD_FLEASIZE))
614 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
615 OBD_MD_FLATIME | OBD_MD_FLMTIME);
618 /* If we have -EEXIST as the status, and we were asked to create
619 * exclusively, we can tell we failed because the file already existed.
621 if (req->rq_status == -EEXIST &&
622 ((rec->ur_flags & (MDS_OPEN_CREAT | MDS_OPEN_EXCL)) ==
623 (MDS_OPEN_CREAT | MDS_OPEN_EXCL))) {
627 /* If we didn't get as far as trying to open, then some locking thing
628 * probably went wrong, and we'll just bail here.
630 if (!intent_disposition(rep, DISP_OPEN_OPEN))
633 /* If we failed, then we must have failed opening, so don't look for
634 * file descriptor or anything, just give the client the bad news.
640 list_for_each(t, &med->med_open_head) {
641 mfd = list_entry(t, struct mds_file_data, mfd_list);
642 if (mfd->mfd_xid == req->rq_xid)
647 /* #warning "XXX fixme" bug 2991 */
648 /* Here it used to LASSERT(mfd) if exp_outstanding_reply != NULL.
649 * Now that exp_outstanding_reply is a list, it's just using mfd != NULL
650 * to detect a re-open */
652 mntget(mds->mds_vfsmnt);
653 CERROR("Re-opened file \n");
654 mfd = mds_dentry_open(dchild, mds->mds_vfsmnt,
655 rec->ur_flags & ~MDS_OPEN_TRUNC, req);
657 CERROR("mds: out of memory\n");
658 GOTO(out_dput, req->rq_status = -ENOMEM);
662 body->handle.cookie = mfd->mfd_handle.h_cookie;
663 CDEBUG(D_INODE, "resend mfd %p, cookie "LPX64"\n", mfd,
664 mfd->mfd_handle.h_cookie);
675 /* do NOT or the MAY_*'s, you'll get the weakest */
676 static int accmode(int flags)
680 if (flags & FMODE_READ)
682 if (flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
684 if (flags & FMODE_EXEC)
689 /* Handles object creation, actual opening, and I/O epoch */
690 static int mds_finish_open(struct ptlrpc_request *req, struct dentry *dchild,
691 struct mds_body *body, int flags, void **handle,
692 struct mds_update_record *rec, struct ldlm_reply *rep)
694 struct obd_device *obd = req->rq_export->exp_obd;
695 struct mds_obd *mds = mds_req2mds(req);
696 struct mds_file_data *mfd = NULL;
702 /* atomically create objects if necessary */
703 down(&dchild->d_inode->i_sem);
704 mode = dchild->d_inode->i_mode;
706 if ((S_ISREG(mode) && !(body->valid & OBD_MD_FLEASIZE)) ||
707 (S_ISDIR(mode) && !(body->valid & OBD_MD_FLDIREA))) {
708 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
709 dchild->d_inode, 0, 0);
711 up(&dchild->d_inode->i_sem);
717 if ((body->valid & OBD_MD_FLEASIZE) &&
718 (rec->ur_flags & MDS_OPEN_HAS_EA)) {
719 up(&dchild->d_inode->i_sem);
723 if (!(body->valid & OBD_MD_FLEASIZE)) {
724 /* no EA: create objects */
725 rc = mds_create_objects(obd, req, 2, rec,
726 dchild, handle, &ids);
728 CERROR("mds_create_object: rc = %d\n", rc);
729 up(&dchild->d_inode->i_sem);
734 if (S_ISREG(dchild->d_inode->i_mode) &&
735 (body->valid & OBD_MD_FLEASIZE)) {
736 rc = mds_revalidate_lov_ea(obd, dchild->d_inode,
739 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
740 dchild->d_inode, 0, 0);
742 up(&dchild->d_inode->i_sem);
748 rc = mds_pack_acl(obd, req->rq_repmsg, 3, body, dchild->d_inode);
750 CERROR("mds_pack_acl: rc = %d\n", rc);
751 up(&dchild->d_inode->i_sem);
755 /* If the inode has no EA data, then MDSs hold size, mtime */
756 if (S_ISREG(dchild->d_inode->i_mode) &&
757 !(body->valid & OBD_MD_FLEASIZE)) {
758 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
759 OBD_MD_FLATIME | OBD_MD_FLMTIME);
762 up(&dchild->d_inode->i_sem);
764 intent_set_disposition(rep, DISP_OPEN_OPEN);
765 mfd = mds_dentry_open(dchild, mds->mds_vfsmnt, flags, req);
767 RETURN(PTR_ERR(mfd));
769 CDEBUG(D_INODE, "mfd %p, cookie "LPX64"\n", mfd,
770 mfd->mfd_handle.h_cookie);
773 mds_dt_update_objids(obd, ids);
774 OBD_FREE(ids, sizeof(*ids) * mds->mds_dt_desc.ld_tgt_count);
780 static int mds_open_by_id(struct ptlrpc_request *req,
781 struct lustre_id *id,
782 struct mds_body *body, int flags,
783 struct mds_update_record *rec,
784 struct ldlm_reply *rep)
786 struct mds_obd *mds = mds_req2mds(req);
787 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
788 struct dentry *dchild;
789 char idname[LL_ID_NAMELEN];
794 down(&pending_dir->i_sem);
795 idlen = ll_id2str(idname, id_ino(id), id_gen(id));
796 dchild = lookup_one_len(idname, mds->mds_pending_dir,
798 if (IS_ERR(dchild)) {
799 up(&pending_dir->i_sem);
800 rc = PTR_ERR(dchild);
801 CERROR("error looking up %s in PENDING: rc = %d\n",
806 up(&pending_dir->i_sem);
807 if (dchild->d_inode != NULL) {
808 mds_inode_set_orphan(dchild->d_inode);
809 mds_pack_inode2body(req2obd(req), body,
812 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
813 intent_set_disposition(rep, DISP_LOOKUP_POS);
814 CWARN("Orphan %s found and opened in PENDING directory\n",
821 * we didn't find it in PENDING so it isn't an orphan. See if it was a
822 * regular inode that was previously created.
824 dchild = mds_id2dentry(req2obd(req), id, NULL);
826 RETURN(PTR_ERR(dchild));
828 mds_pack_inode2body(req2obd(req), body,
831 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
832 intent_set_disposition(rep, DISP_LOOKUP_POS);
835 rc = mds_finish_open(req, dchild, body, flags, &handle, rec, rep);
836 rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
837 req, rc, rep ? rep->lock_policy_res1 : 0);
838 /* XXX what do we do here if mds_finish_transno itself failed? */
843 int mds_pin(struct ptlrpc_request *req, int offset)
845 struct obd_device *obd = req->rq_export->exp_obd;
846 struct mds_body *request_body, *reply_body;
847 struct lvfs_run_ctxt saved;
848 int rc, size = sizeof(*reply_body);
851 request_body = lustre_msg_buf(req->rq_reqmsg, offset,
852 sizeof(*request_body));
854 rc = lustre_pack_reply(req, 1, &size, NULL);
857 reply_body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply_body));
859 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
860 rc = mds_open_by_id(req, &request_body->id1, reply_body,
861 request_body->flags, NULL, NULL);
862 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
868 * get a lock on the ino to sync with creation WRT inode reuse (bug 2029). If
869 * child_lockh is NULL we just get the lock as a barrier to wait for other
870 * holders of this lock, and drop it right away again.
872 int mds_lock_new_child(struct obd_device *obd, struct inode *inode,
873 struct lustre_handle *child_lockh)
875 struct ldlm_res_id child_res_id = { .name = { inode->i_ino, 0, 1, 0 } };
876 struct lustre_handle lockh;
881 if (child_lockh == NULL)
882 child_lockh = &lockh;
884 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, child_res_id,
885 LDLM_PLAIN, NULL, LCK_EX, &lock_flags,
886 mds_blocking_ast, ldlm_completion_ast, NULL,
887 NULL, NULL, 0, NULL, child_lockh);
889 CERROR("ldlm_cli_enqueue: %d\n", rc);
890 else if (child_lockh == &lockh)
891 ldlm_lock_decref(child_lockh, LCK_EX);
896 int mds_open(struct mds_update_record *rec, int offset,
897 struct ptlrpc_request *req, struct lustre_handle *child_lockh)
899 /* XXX ALLOCATE _something_ - 464 bytes on stack here */
900 struct obd_device *obd = req->rq_export->exp_obd;
901 struct mds_export_data *med = &req->rq_export->u.eu_mds_data;
902 struct mds_obd *mds = mds_req2mds(req);
903 struct ldlm_reply *rep = NULL;
904 struct mds_body *body = NULL;
905 struct dentry *dchild = NULL, *dparent = NULL;
906 struct lustre_handle parent_lockh[2] = {{0}, {0}};
907 int rc = 0, cleanup_phase = 0, acc_mode, created = 0;
908 int parent_mode = LCK_PR;
910 struct dentry_params dp;
911 struct mea *mea = NULL;
912 int mea_size, update_mode;
913 int child_mode = LCK_PR;
916 DEBUG_REQ(D_INODE, req, "parent "DLID4" name %*s mode %o",
917 OLID4(rec->ur_id1), rec->ur_namelen - 1, rec->ur_name,
920 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PAUSE_OPEN | OBD_FAIL_ONCE,
921 (obd_timeout + 1) / 4);
923 if (offset == 3) { /* intent */
924 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
925 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
926 } else if (offset == 1) { /* non-intent reint */
927 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
933 MDS_CHECK_RESENT(req, reconstruct_open(rec, offset, req, child_lockh));
936 * Step 0: If we are passed a id, then we assume the client already
937 * opened this file and is only replaying the RPC, so we open the inode
938 * by fid (at some large expense in security).
940 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
941 CDEBUG(D_HA, "open obj "DLID4" name %*s mode %o\n",
942 OLID4(rec->ur_id2), rec->ur_namelen - 1,
943 rec->ur_name, rec->ur_mode);
945 LASSERT(id_ino(rec->ur_id2));
947 rc = mds_open_by_id(req, rec->ur_id2, body,
948 rec->ur_flags, rec, rep);
950 mds_body_do_reverse_map(med, body);
954 /* We didn't find the correct inode on disk either, so we
955 * need to re-create it via a regular replay. */
956 LASSERT(rec->ur_flags & MDS_OPEN_CREAT);
958 LASSERT(!id_ino(rec->ur_id2));
961 LASSERT(offset == 3); /* If we got here, we must be called via intent */
963 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) {
964 CERROR("test case OBD_FAIL_MDS_OPEN_PACK\n");
968 acc_mode = accmode(rec->ur_flags);
970 /* Step 1: Find and lock the parent */
971 if (rec->ur_flags & MDS_OPEN_CREAT) {
972 /* XXX Well, in fact we only need this lock mode change if
973 in addition to O_CREAT, the file does not exist.
974 But we do not know if it exists or not yet */
975 parent_mode = LCK_PW;
978 if (rec->ur_namelen == 1) {
979 /* client (LMV) wants to open the file by id */
980 CDEBUG(D_OTHER, "OPEN by id "DLID4"\n", OLID4(rec->ur_id1));
981 dchild = mds_id2dentry(obd, rec->ur_id1, NULL);
982 if (IS_ERR(dchild)) {
983 rc = PTR_ERR(dparent);
984 CERROR("child lookup by an id error %d\n", rc);
991 dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, parent_mode,
992 parent_lockh, &update_mode, rec->ur_name,
993 rec->ur_namelen - 1, MDS_INODELOCK_UPDATE);
994 if (IS_ERR(dparent)) {
995 rc = PTR_ERR(dparent);
997 CERROR("parent lookup for "DLID4" failed, error %d\n",
998 OLID4(rec->ur_id1), rc);
1000 /* Just cannot find parent - make it look like
1001 usual negative lookup to avoid extra MDS RPC */
1002 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1003 intent_set_disposition(rep, DISP_LOOKUP_NEG);
1007 LASSERT(dparent->d_inode != NULL);
1009 cleanup_phase = 1; /* parent dentry and lock */
1011 /* try to retrieve MEA data for this dir */
1012 rc = mds_md_get_attr(obd, dparent->d_inode, &mea, &mea_size);
1018 * dir is already splitted, check is requested filename should *
1019 * live at this MDS or at another one.
1022 i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
1023 if (mea->mea_master != id_group(&mea->mea_ids[i])) {
1025 "%s: inapropriate MDS(%d) for %lu/%u:%s."
1026 " should be %lu(%d)\n", obd->obd_name,
1027 mea->mea_master, dparent->d_inode->i_ino,
1028 dparent->d_inode->i_generation, rec->ur_name,
1029 (unsigned long)id_group(&mea->mea_ids[i]), i);
1030 GOTO(cleanup, rc = -ERESTART);
1034 /* Step 2: Lookup the child */
1035 dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1);
1036 if (IS_ERR(dchild)) {
1037 rc = PTR_ERR(dchild);
1038 dchild = NULL; /* don't confuse mds_finish_transno() below */
1043 cleanup_phase = 2; /* child dentry */
1045 if (dchild->d_flags & DCACHE_CROSS_REF) {
1046 CDEBUG(D_OTHER, "cross reference: "DLID4"\n", OLID4(rec->ur_id1));
1047 LASSERT(rec->ur_namelen > 1);
1049 /* we're gonna acquire LOOKUP lock on the child,
1050 * but we have already locked parent and our order
1051 * may conflict with enqueue_order_locks(). so,
1052 * drop parent lock and acquire both the locks in
1053 * common order. bug 6190 */
1055 if (parent_lockh[1].cookie != 0)
1056 ldlm_lock_decref(parent_lockh + 1, update_mode);
1058 ldlm_lock_decref(parent_lockh, parent_mode);
1063 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1,
1064 parent_lockh, &dparent,
1065 LCK_PR, MDS_INODELOCK_UPDATE,
1066 &update_mode, rec->ur_name,
1067 rec->ur_namelen, child_lockh,
1069 MDS_INODELOCK_LOOKUP);
1075 if (parent_lockh[1].cookie != 0)
1076 ldlm_lock_decref(parent_lockh + 1, update_mode);
1078 ldlm_lock_decref(parent_lockh, LCK_PR);
1080 if (dchild->d_inode || !(dchild->d_flags & DCACHE_CROSS_REF)) {
1081 CDEBUG(D_OTHER, "race: name changed (%p)\n",
1083 if (dchild->d_inode)
1084 ldlm_lock_decref(child_lockh, LCK_PR);
1090 mds_pack_dentry2body(obd, body, dchild, 1);
1091 intent_set_disposition(rep, DISP_LOOKUP_POS);
1092 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1095 OBD_FREE(mea, mea_size);
1101 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1103 if (dchild->d_inode)
1104 intent_set_disposition(rep, DISP_LOOKUP_POS);
1106 intent_set_disposition(rep, DISP_LOOKUP_NEG);
1108 /* Step 3: If the child was negative, and we're supposed to, create it.*/
1109 if (dchild->d_inode == NULL) {
1112 struct inode *inode;
1114 ino = (unsigned long)id_ino(rec->ur_id2);
1116 rc = mds_try_to_split_dir(obd, dparent, &mea, 0,
1119 CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d\n",
1120 obd->obd_name, dparent->d_inode->i_ino,
1121 dparent->d_inode->i_generation, rc);
1124 /* dir got splitted */
1125 GOTO(cleanup, rc = -ERESTART);
1126 } else if (rc < 0) {
1127 /* error happened during spitting */
1131 if (!(rec->ur_flags & MDS_OPEN_CREAT)) {
1133 * dentry is negative and we weren't supposed to create
1134 * object, get out of here.
1136 GOTO(cleanup, rc = -ENOENT);
1139 intent_set_disposition(rep, DISP_OPEN_CREATE);
1140 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_CREATE,
1142 if (IS_ERR(handle)) {
1143 rc = PTR_ERR(handle);
1147 dchild->d_fsdata = (void *) &dp;
1151 rc = ll_vfs_create(dparent->d_inode, dchild, rec->ur_mode, NULL);
1152 if (dchild->d_fsdata == (void *)(unsigned long)ino)
1153 dchild->d_fsdata = NULL;
1156 CDEBUG(D_INODE, "error during create: %d\n", rc);
1159 inode = dchild->d_inode;
1161 LASSERT(ino == inode->i_ino);
1163 /* written as part of setattr */
1164 inode->i_generation = id_gen(rec->ur_id2);
1165 CDEBUG(D_HA, "recreated ino %lu with gen %u\n",
1166 inode->i_ino, inode->i_generation);
1170 LTIME_S(iattr.ia_atime) = rec->ur_time;
1171 LTIME_S(iattr.ia_ctime) = rec->ur_time;
1172 LTIME_S(iattr.ia_mtime) = rec->ur_time;
1174 iattr.ia_uid = rec->ur_fsuid;
1175 if (dparent->d_inode->i_mode & S_ISGID)
1176 iattr.ia_gid = dparent->d_inode->i_gid;
1178 iattr.ia_gid = rec->ur_fsgid;
1180 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
1181 ATTR_MTIME | ATTR_CTIME;
1183 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
1185 CERROR("error on child setattr: rc = %d\n", rc);
1187 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
1189 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
1191 CERROR("error on parent setattr: rc = %d\n", rc);
1193 MD_COUNTER_INCREMENT(obd, create);
1197 rc = mds_update_inode_sid(obd, dchild->d_inode,
1198 handle, rec->ur_id2);
1200 CERROR("mds_update_inode_sid() failed, "
1203 id_assign_fid(&body->id1, rec->ur_id2);
1206 * make sure, that fid is up-to-date.
1208 mds_set_last_fid(obd, id_fid(rec->ur_id2));
1210 rc = mds_alloc_inode_sid(obd, dchild->d_inode,
1211 handle, &body->id1);
1213 CERROR("mds_alloc_inode_sid() failed, "
1218 if (!(rec->ur_flags & O_EXCL)) { /* bug 3313 */
1219 rc = fsfilt_commit(obd, dchild->d_inode->i_sb,
1220 dchild->d_inode, handle,
1221 req->rq_export->exp_sync);
1225 acc_mode = 0; /* Don't check for permissions */
1227 mds_pack_inode2body(obd, body, dchild->d_inode, 1);
1229 LASSERTF(!mds_inode_is_orphan(dchild->d_inode),
1230 "dchild %.*s (%p) inode %p\n", dchild->d_name.len,
1231 dchild->d_name.name, dchild, dchild->d_inode);
1233 if (S_ISREG(dchild->d_inode->i_mode)) {
1234 /* Check permissions etc */
1235 rc = ll_permission(dchild->d_inode, acc_mode, NULL);
1239 /* Can't write to a read-only file */
1240 if (IS_RDONLY(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0)
1241 GOTO(cleanup, rc = -EPERM);
1243 /* An append-only file must be opened in append mode for
1245 if (IS_APPEND(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0 &&
1246 ((rec->ur_flags & MDS_OPEN_APPEND) == 0 ||
1247 (rec->ur_flags & MDS_OPEN_TRUNC) != 0))
1248 GOTO(cleanup, rc = -EPERM);
1251 if (!created && (rec->ur_flags & MDS_OPEN_CREAT) &&
1252 (rec->ur_flags & MDS_OPEN_EXCL)) {
1253 /* File already exists, we didn't just create it, and we
1254 * were passed O_EXCL; err-or. */
1255 GOTO(cleanup, rc = -EEXIST); // returns a lock to the client
1258 if (S_ISDIR(dchild->d_inode->i_mode)) {
1259 if (rec->ur_flags & MDS_OPEN_CREAT ||
1260 rec->ur_flags & FMODE_WRITE) {
1261 /* we are trying to create or write a exist dir */
1262 GOTO(cleanup, rc = -EISDIR);
1264 if (ll_permission(dchild->d_inode, acc_mode, NULL))
1265 GOTO(cleanup, rc = -EACCES);
1268 * here was checking for possible GNS mount points to skip their
1269 * open. I removed it as its detection based only on SUID bit is
1270 * not reliable. Opening such a dirs should not cause any
1271 * problems, at least tests show that. --umka
1275 /* if we are following a symlink, don't open */
1276 if (S_ISLNK(dchild->d_inode->i_mode))
1277 GOTO(cleanup_no_trans, rc = 0);
1279 if ((rec->ur_flags & MDS_OPEN_DIRECTORY) &&
1280 !S_ISDIR(dchild->d_inode->i_mode))
1281 GOTO(cleanup, rc = -ENOTDIR);
1283 /* check permission even it's special files */
1284 if (S_ISCHR(dchild->d_inode->i_mode) ||
1285 S_ISBLK(dchild->d_inode->i_mode) ||
1286 S_ISFIFO(dchild->d_inode->i_mode) ||
1287 S_ISSOCK(dchild->d_inode->i_mode)) {
1288 rc = ll_permission(dchild->d_inode, acc_mode, NULL);
1293 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_CREATE)) {
1294 obd_fail_loc = OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE;
1295 GOTO(cleanup, rc = -EAGAIN);
1299 /* We cannot use acc_mode here, because it is zeroed in case of
1300 creating a file, so we get wrong lockmode */
1301 if (accmode(rec->ur_flags) & MAY_WRITE)
1302 child_mode = LCK_CW;
1303 else if (accmode(rec->ur_flags) & MAY_EXEC)
1304 child_mode = LCK_PR;
1306 child_mode = LCK_CR;
1308 /* Always returning LOOKUP lock if open succesful to guard
1309 * dentry on client. In case of replay we do not get a lock
1310 * assuming that the caller has it already */
1311 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)) {
1312 struct ldlm_res_id child_res_id = { .name = {0}};
1313 ldlm_policy_data_t policy;
1316 /* LOOKUP lock will protect dentry on client -bzzz */
1317 policy.l_inodebits.bits = MDS_INODELOCK_LOOKUP |
1320 child_res_id.name[0] = id_fid(&body->id1);
1321 child_res_id.name[1] = id_group(&body->id1);
1323 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1324 child_res_id, LDLM_IBITS, &policy,
1325 child_mode, &lock_flags,
1326 mds_blocking_ast, ldlm_completion_ast,
1327 NULL, NULL, NULL, 0, NULL, child_lockh);
1334 /* re-enable test 24n in sanity.sh: it needs LOOKUP lock on open */
1335 #warning "disable opencache lock for CMD2"
1338 /* Step 5: mds_open it */
1339 rc = mds_finish_open(req, dchild, body, rec->ur_flags, &handle,
1344 /* if this is a writer, we have to invalidate client's
1345 * update locks in order to make sure they don't use
1346 * isize/iblocks from mds anymore.
1347 * FIXME: can cause a deadlock, use mds_get_parent_child_locked()
1348 * XXX: optimization is to do this for first writer only */
1349 if (accmode(rec->ur_flags) & MAY_WRITE) {
1350 struct ldlm_res_id child_res_id = { .name = {0}};
1351 ldlm_policy_data_t sz_policy;
1352 struct lustre_handle sz_lockh;
1355 child_res_id.name[0] = id_fid(&body->id1);
1356 child_res_id.name[1] = id_group(&body->id1);
1357 sz_policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1359 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1360 child_res_id, LDLM_IBITS, &sz_policy,
1361 LCK_PW, &lock_flags, mds_blocking_ast,
1362 ldlm_completion_ast, NULL, NULL, NULL,
1363 0, NULL, &sz_lockh);
1365 ldlm_lock_decref(&sz_lockh, LCK_PW);
1367 CERROR("can't invalidate client's update locks\n");
1372 rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
1373 req, rc, rep ? rep->lock_policy_res1 : 0);
1376 switch (cleanup_phase) {
1379 ldlm_lock_decref(child_lockh, child_mode);
1380 child_lockh->cookie = 0;
1383 if (rc && created) {
1384 int err = vfs_unlink(dparent->d_inode, dchild);
1386 CERROR("unlink(%.*s) in error path: %d\n",
1387 dchild->d_name.len, dchild->d_name.name,
1390 } else if (created) {
1391 mds_lock_new_child(obd, dchild->d_inode, NULL);
1395 if (dparent == NULL)
1400 if (parent_lockh[1].cookie != 0)
1401 ldlm_lock_decref(parent_lockh + 1, update_mode);
1404 ldlm_lock_decref(parent_lockh, parent_mode);
1406 ptlrpc_save_lock (req, parent_lockh, parent_mode);
1409 OBD_FREE(mea, mea_size);
1411 atomic_inc(&mds->mds_open_count);
1413 mds_body_do_reverse_map(med, body);
1416 * If we have not taken the "open" lock, we may not return 0 here,
1417 * because caller expects 0 to mean "lock is taken", and it needs
1418 * nonzero return here for caller to return EDLM_LOCK_ABORTED to
1419 * client. Later caller should rewrite the return value back to zero
1420 * if it to be used any further.
1422 if ((cleanup_phase != 3) && !rc)
1428 /* Close a "file descriptor" and possibly unlink an orphan from the
1429 * PENDING directory. Caller must hold child->i_sem, this drops it.
1431 * If we are being called from mds_disconnect() because the client has
1432 * disappeared, then req == NULL and we do not update last_rcvd because
1433 * there is nothing that could be recovered by the client at this stage
1434 * (it will not even _have_ an entry in last_rcvd anymore).
1436 * Returns EAGAIN if the client needs to get more data and re-close. */
1437 int mds_mfd_close(struct ptlrpc_request *req, int offset,
1438 struct obd_device *obd, struct mds_file_data *mfd,
1441 struct inode *inode = mfd->mfd_dentry->d_inode;
1442 char idname[LL_ID_NAMELEN];
1443 int last_orphan, idlen, rc = 0, cleanup_phase = 0;
1444 struct dentry *pending_child = NULL;
1445 struct mds_obd *mds = &obd->u.mds;
1446 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1447 void *handle = NULL;
1448 struct mds_body *request_body = NULL, *reply_body = NULL;
1449 struct dentry_params dp;
1450 struct iattr iattr = { 0 };
1451 struct llog_create_locks *lcl = NULL;
1454 if (req && req->rq_reqmsg != NULL)
1455 request_body = lustre_msg_buf(req->rq_reqmsg, offset,
1456 sizeof(*request_body));
1457 if (req && req->rq_repmsg != NULL)
1458 reply_body = lustre_msg_buf(req->rq_repmsg, 0,
1459 sizeof(*reply_body));
1461 idlen = ll_id2str(idname, inode->i_ino, inode->i_generation);
1462 CDEBUG(D_INODE, "inode %p ino %s nlink %d orphan %d\n", inode,
1463 idname, inode->i_nlink, mds_orphan_open_count(inode));
1465 last_orphan = mds_orphan_open_dec_test(inode) &&
1466 mds_inode_is_orphan(inode);
1467 UP_WRITE_I_ALLOC_SEM(inode);
1469 /* this is half of the actual "close" */
1470 if (mfd->mfd_mode & FMODE_WRITE) {
1471 rc = mds_put_write_access(mds, inode, request_body,
1472 last_orphan && unlink_orphan);
1473 } else if (mfd->mfd_mode & FMODE_EXEC) {
1474 mds_allow_write_access(inode);
1477 if (last_orphan && unlink_orphan) {
1478 struct lov_mds_md *lmm = NULL;
1479 int stripe_count = 0;
1480 LASSERT(rc == 0); /* mds_put_write_access must have succeeded */
1482 CDEBUG(D_HA, "destroying orphan object %s\n", idname);
1484 if ((S_ISREG(inode->i_mode) && inode->i_nlink != 1) ||
1485 (S_ISDIR(inode->i_mode) && inode->i_nlink != 2))
1486 CERROR("found \"orphan\" %s %s with link count %d\n",
1487 S_ISREG(inode->i_mode) ? "file" : "dir",
1488 idname, inode->i_nlink);
1490 * sadly, there is no easy way to save pending_child from
1491 * mds_reint_unlink() into mfd, so we need to re-lookup, but
1492 * normally it will still be in the dcache.
1494 down(&pending_dir->i_sem);
1495 cleanup_phase = 1; /* up(i_sem) when finished */
1496 pending_child = lookup_one_len(idname, mds->mds_pending_dir,
1498 if (IS_ERR(pending_child))
1499 GOTO(cleanup, rc = PTR_ERR(pending_child));
1500 if (pending_child->d_inode == NULL) {
1501 CERROR("orphan %s has been removed\n", idname);
1502 GOTO(cleanup, rc = 0);
1505 cleanup_phase = 2; /* dput(pending_child) when finished */
1506 if (S_ISDIR(pending_child->d_inode->i_mode)) {
1507 rc = vfs_rmdir(pending_dir, pending_child);
1509 CERROR("error unlinking orphan dir %s: rc %d\n",
1514 if (req != NULL && req->rq_repmsg != NULL) {
1515 lmm = lustre_msg_buf(req->rq_repmsg, 1, 0);
1516 stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
1519 handle = fsfilt_start_log(obd, pending_dir, FSFILT_OP_UNLINK,
1520 NULL, stripe_count);
1521 if (IS_ERR(handle)) {
1522 rc = PTR_ERR(handle);
1527 pending_child->d_fsdata = (void *) &dp;
1530 rc = vfs_unlink(pending_dir, pending_child);
1532 CERROR("error unlinking orphan %s: rc %d\n",
1535 if (req != NULL && req->rq_repmsg != NULL &&
1536 (reply_body->valid & OBD_MD_FLEASIZE) &&
1537 mds_log_op_unlink(obd, pending_child->d_inode,
1538 lmm, req->rq_repmsg->buflens[1],
1539 lustre_msg_buf(req->rq_repmsg, 2, 0),
1540 req->rq_repmsg->buflens[2], &lcl) > 0) {
1541 reply_body->valid |= OBD_MD_FLCOOKIE;
1544 rc = mds_destroy_object(obd, inode, 1);
1546 CERROR("cannot destroy OSS object on close, err %d\n",
1551 goto out; /* Don't bother updating attrs on unlinked inode */
1552 } else if ((mfd->mfd_mode & FMODE_WRITE) && rc == 0 && request_body) {
1553 /* last writer closed file - let's update i_size/i_blocks */
1554 if (request_body->valid & OBD_MD_FLSIZE) {
1555 LASSERT(request_body->valid & OBD_MD_FLBLOCKS);
1556 CDEBUG(D_OTHER, "update size "LPD64" for "DLID4
1557 ", epoch "LPD64"\n", inode->i_size,
1558 OLID4(&request_body->id1),
1559 request_body->io_epoch);
1560 iattr.ia_size = inode->i_size;
1561 iattr.ia_valid |= ATTR_SIZE;
1566 if (request_body != NULL && mfd->mfd_mode & FMODE_WRITE && rc == 0) {
1567 /* Update the on-disk attributes if this was the last write
1568 * close, and all information was provided (i.e., rc == 0)
1570 * XXX this should probably be abstracted with mds_reint_setattr
1573 if (request_body->valid & OBD_MD_FLMTIME &&
1574 LTIME_S(request_body->mtime) > LTIME_S(inode->i_mtime)) {
1575 LTIME_S(iattr.ia_mtime) = LTIME_S(request_body->mtime);
1576 iattr.ia_valid |= ATTR_MTIME;
1578 if (request_body->valid & OBD_MD_FLCTIME &&
1579 LTIME_S(request_body->ctime) > LTIME_S(inode->i_ctime)) {
1580 LTIME_S(iattr.ia_ctime) = LTIME_S(request_body->ctime);
1581 iattr.ia_valid |= ATTR_CTIME;
1584 /* XXX can't set block count with fsfilt_setattr (!) */
1585 if (request_body->valid & OBD_MD_FLSIZE) {
1586 iattr.ia_valid |= ATTR_SIZE;
1587 iattr.ia_size = request_body->size;
1589 /* if (request_body->valid & OBD_MD_FLBLOCKS) {
1590 iattr.ia_valid |= ATTR_BLOCKS;
1591 iattr.ia_blocks = request_body->blocks
1596 if (request_body != NULL && request_body->valid & OBD_MD_FLATIME) {
1597 /* Only start a transaction to write out only the atime if
1598 * it is more out-of-date than the specified limit. If we
1599 * are already going to write out the atime then do it anyway.
1601 if ((request_body->atime >
1602 LTIME_S(inode->i_atime) + MAX_ATIME_DIFF) ||
1603 (iattr.ia_valid != 0 &&
1604 request_body->atime > LTIME_S(inode->i_atime))) {
1605 LTIME_S(iattr.ia_atime) = request_body->atime;
1606 iattr.ia_valid |= ATTR_ATIME;
1610 if (iattr.ia_valid != 0) {
1612 handle = fsfilt_start(obd,inode,FSFILT_OP_SETATTR,NULL);
1614 GOTO(cleanup, rc = PTR_ERR(handle));
1615 rc = fsfilt_setattr(obd, mfd->mfd_dentry, handle, &iattr, 0);
1617 CERROR("error in setattr(%s): rc %d\n", idname, rc);
1620 /* If other clients have this file open for write, rc will be > 0 */
1623 l_dput(mfd->mfd_dentry);
1624 mds_mfd_destroy(mfd);
1627 atomic_dec(&mds->mds_open_count);
1628 if (req != NULL && reply_body != NULL) {
1629 rc = mds_finish_transno(mds, pending_dir, handle, req, rc, 0);
1630 } else if (handle) {
1631 int err, force_sync = 0;
1633 if (req && req->rq_export)
1634 force_sync = req->rq_export->exp_sync;
1636 err = fsfilt_commit(obd, mds->mds_sb, pending_dir, handle,
1639 CERROR("error committing close: %d\n", err);
1645 switch (cleanup_phase) {
1648 ptlrpc_save_llog_lock(req, lcl);
1649 dput(pending_child);
1651 up(&pending_dir->i_sem);
1656 static int mds_extent_lock_callback(struct ldlm_lock *lock,
1657 struct ldlm_lock_desc *new, void *data,
1660 struct lustre_handle lockh = { 0 };
1665 case LDLM_CB_BLOCKING:
1666 ldlm_lock2handle(lock, &lockh);
1667 rc = ldlm_cli_cancel(&lockh);
1669 CERROR("ldlm_cli_cancel failed: %d\n", rc);
1671 case LDLM_CB_CANCELING: {
1680 __u64 lov_merge_size(struct lov_stripe_md *lsm, int kms);
1681 __u64 lov_merge_blocks(struct lov_stripe_md *lsm);
1683 int mds_validate_size(struct obd_device *obd, struct mds_body *body,
1684 struct mds_file_data *mfd)
1686 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
1687 struct inode *inode = mfd->mfd_dentry->d_inode;
1688 struct lustre_handle lockh = { 0 };
1689 struct lov_stripe_md *lsm = NULL;
1694 /* we update i_size/i_blocks only for regular files */
1695 if (!S_ISREG(inode->i_mode))
1698 /* we update i_size/i_blocks only for writers */
1699 if (!(mfd->mfd_mode & FMODE_WRITE))
1702 /* we like when client reports actual i_size/i_blocks himself */
1703 if (body->valid & OBD_MD_FLSIZE) {
1704 LASSERT(body->valid & OBD_MD_FLBLOCKS);
1705 CDEBUG(D_OTHER, "client reports "LPD64"/"LPD64" for "DLID4"\n",
1706 body->size, body->blocks, OLID4(&body->id1));
1710 /* we shouldn't fetch size from OSTes during recovery - deadlock */
1711 if (obd->obd_recovering)
1714 DOWN_READ_I_ALLOC_SEM(inode);
1715 if (atomic_read(&inode->i_writecount) > 1
1716 || mds_inode_is_orphan(inode)) {
1717 /* there is no need to update i_size/i_blocks on orphans.
1718 * also, if this is not last writer, then it doesn't make
1719 * sense to fetch i_size/i_blocks from OSSes */
1720 UP_READ_I_ALLOC_SEM(inode);
1723 UP_READ_I_ALLOC_SEM(inode);
1725 /* 1: client didn't send actual i_size/i_blocks
1726 * 2: we seem to be last writer
1727 * 3: the file doesn't look like to be disappeared
1728 * conclusion: we're gonna fetch them from OSSes */
1730 down(&inode->i_sem);
1731 len = fsfilt_get_md(obd, inode, NULL, 0, EA_LOV);
1735 CERROR("error getting inode %lu MD: %d\n", inode->i_ino, len);
1736 GOTO(cleanup, rc = len);
1737 } else if (len == 0) {
1738 CDEBUG(D_INODE, "no LOV in inode %lu\n", inode->i_ino);
1739 GOTO(cleanup, rc = 0);
1742 OBD_ALLOC(lmm, len);
1744 CERROR("can't allocate memory\n");
1745 GOTO(cleanup, rc = -ENOMEM);
1748 down(&inode->i_sem);
1749 rc = fsfilt_get_md(obd, inode, lmm, len, EA_LOV);
1753 CERROR("error getting inode %lu MD: %d\n", inode->i_ino, rc);
1757 rc = obd_unpackmd(obd->u.mds.mds_dt_exp, &lsm, lmm, len);
1759 CERROR("error getting inode %lu MD: %d\n", inode->i_ino, rc);
1763 CDEBUG(D_DLMTRACE, "Glimpsing inode %lu\n", inode->i_ino);
1765 flags = LDLM_FL_HAS_INTENT;
1766 rc = obd_enqueue(obd->u.mds.mds_dt_exp, lsm, LDLM_EXTENT, &policy,
1767 LCK_PR, &flags, mds_extent_lock_callback,
1768 ldlm_completion_ast, NULL, NULL,
1769 sizeof(struct ost_lvb), lustre_swab_ost_lvb, &lockh);
1771 CERROR("obd_enqueue returned rc %d, returning -EIO\n", rc);
1775 body->size = lov_merge_size(lsm, 0);
1776 body->blocks = lov_merge_blocks(lsm);
1777 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
1779 CDEBUG(D_OTHER, "LOV reports "LPD64"/"LPD64" for "DLID4"\n",
1780 body->size, body->blocks, OLID4(&body->id1));
1782 obd_cancel(obd->u.mds.mds_dt_exp, lsm, LCK_PR, &lockh);
1786 obd_free_memmd(obd->u.mds.mds_dt_exp, &lsm);
1792 int mds_close(struct ptlrpc_request *req, int offset)
1794 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1795 struct obd_device *obd = req->rq_export->exp_obd;
1796 struct mds_body *body;
1797 struct mds_file_data *mfd;
1798 struct lvfs_run_ctxt saved;
1799 struct inode *inode;
1800 int rc, repsize[3] = {sizeof(struct mds_body),
1801 obd->u.mds.mds_max_mdsize,
1802 obd->u.mds.mds_max_cookiesize};
1804 MD_COUNTER_INCREMENT(obd, close);
1806 rc = lustre_pack_reply(req, 3, repsize, NULL);
1808 CERROR("lustre_pack_reply: rc = %d\n", rc);
1809 req->rq_status = rc;
1811 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1814 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1815 DEBUG_REQ(D_HA, req, "close replay");
1816 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
1817 lustre_msg_buf(req->rq_reqmsg, offset + 1, 0),
1818 req->rq_repmsg->buflens[2]);
1821 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1822 lustre_swab_mds_body);
1824 CERROR("Can't unpack body\n");
1825 req->rq_status = -EFAULT;
1829 if (body->flags & MDS_BFLAG_UNCOMMITTED_WRITES)
1830 /* do some stuff */ ;
1832 mfd = mds_handle2mfd(&body->handle);
1834 DEBUG_REQ(D_ERROR, req, "no handle for file close ino "LPD64
1835 ": cookie "LPX64, id_ino(&body->id1), body->handle.cookie);
1836 req->rq_status = -ESTALE;
1840 rc = mds_validate_size(obd, body, mfd);
1843 inode = mfd->mfd_dentry->d_inode;
1845 if (mfd->mfd_mode & FMODE_WRITE) {
1846 /* we set i_size/i_blocks here, nobody will see
1847 * them until all write references are dropped.
1848 * btw, we hold one reference */
1849 if (body->valid & OBD_MD_FLSIZE)
1850 i_size_write(inode, body->size);
1851 if (body->valid & OBD_MD_FLBLOCKS)
1852 inode->i_blocks = body->blocks;
1855 /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
1856 DOWN_WRITE_I_ALLOC_SEM(inode); /* mds_mfd_close drops this */
1857 if (mds_inode_is_orphan(inode) && mds_orphan_open_count(inode) == 1) {
1858 struct mds_body *rep_body;
1860 rep_body = lustre_msg_buf(req->rq_repmsg, 0,
1861 sizeof (*rep_body));
1862 LASSERT(rep_body != NULL);
1864 mds_pack_inode2body(obd, rep_body, inode,
1865 (body->valid & OBD_MD_FID) ? 1 : 0);
1867 mds_pack_md(obd, req->rq_repmsg, 1, rep_body,
1868 inode, MDS_PACK_MD_LOCK, 0);
1870 spin_lock(&med->med_open_lock);
1871 list_del(&mfd->mfd_list);
1872 spin_unlock(&med->med_open_lock);
1874 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1875 req->rq_status = mds_mfd_close(req, offset, obd, mfd, 1);
1876 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1878 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) {
1879 CERROR("test case OBD_FAIL_MDS_CLOSE_PACK\n");
1880 req->rq_status = -ENOMEM;
1889 int mds_done_writing(struct ptlrpc_request *req, int offset)
1891 struct mds_body *body;
1892 int rc, size = sizeof(struct mds_body);
1895 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1897 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1898 lustre_swab_mds_body);
1900 CERROR("Can't unpack body\n");
1901 req->rq_status = -EFAULT;
1905 rc = lustre_pack_reply(req, 1, &size, NULL);
1907 CERROR("lustre_pack_reply: rc = %d\n", rc);
1908 req->rq_status = rc;