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>
46 #include <linux/lustre_gs.h>
48 #include "mds_internal.h"
50 /* Exported function from this file are:
52 * mds_open - called by the intent handler
53 * mds_close - an rpc handling function
54 * mds_pin - an rpc handling function - which will go away
55 * mds_mfd_close - for force closing files when a client dies
59 * MDS file data handling: file data holds a handle for a file opened
63 static void mds_mfd_addref(void *mfdp)
65 struct mds_file_data *mfd = mfdp;
67 atomic_inc(&mfd->mfd_refcount);
68 CDEBUG(D_INFO, "GETting mfd %p : new refcount %d\n", mfd,
69 atomic_read(&mfd->mfd_refcount));
72 struct mds_file_data *mds_mfd_new(void)
74 struct mds_file_data *mfd;
76 OBD_ALLOC(mfd, sizeof *mfd);
78 CERROR("mds: out of memory\n");
82 atomic_set(&mfd->mfd_refcount, 2);
84 INIT_LIST_HEAD(&mfd->mfd_handle.h_link);
85 class_handle_hash(&mfd->mfd_handle, mds_mfd_addref);
90 struct mds_file_data *mds_handle2mfd(struct lustre_handle *handle)
93 LASSERT(handle != NULL);
94 RETURN(class_handle2object(handle->cookie));
97 void mds_mfd_put(struct mds_file_data *mfd)
99 CDEBUG(D_INFO, "PUTting mfd %p : new refcount %d\n", mfd,
100 atomic_read(&mfd->mfd_refcount) - 1);
101 LASSERT(atomic_read(&mfd->mfd_refcount) > 0 &&
102 atomic_read(&mfd->mfd_refcount) < 0x5a5a);
103 if (atomic_dec_and_test(&mfd->mfd_refcount)) {
104 LASSERT(list_empty(&mfd->mfd_handle.h_link));
105 OBD_FREE(mfd, sizeof *mfd);
109 static void mds_mfd_destroy(struct mds_file_data *mfd)
111 class_handle_unhash(&mfd->mfd_handle);
115 /* Caller must hold mds->mds_epoch_sem */
116 static int mds_alloc_filterdata(struct inode *inode)
118 LASSERT(LUSTRE_FILTERDATA(inode) == NULL);
119 OBD_ALLOC(LUSTRE_FILTERDATA(inode), sizeof(struct mds_filter_data));
120 if (LUSTRE_FILTERDATA(inode) == NULL)
122 LASSERT(igrab(inode) == inode);
126 /* Caller must hold mds->mds_epoch_sem */
127 static void mds_free_filterdata(struct inode *inode)
129 LASSERT(LUSTRE_FILTERDATA(inode) != NULL);
130 OBD_FREE(LUSTRE_FILTERDATA(inode), sizeof(struct mds_filter_data));
131 LUSTRE_FILTERDATA(inode) = NULL;
135 /* Write access to a file: executors cause a negative count,
136 * writers a positive count. The semaphore is needed to perform
137 * a check for the sign and then increment or decrement atomically.
139 * This code is closely tied to the allocation of the d_fsdata and the
140 * MDS epoch, so we use the same semaphore for the whole lot.
142 * We could use a different semaphore for each file, if it ever shows
143 * up in a profile, which it won't.
145 * epoch argument is nonzero during recovery */
146 static int mds_get_write_access(struct mds_obd *mds, struct inode *inode,
151 down(&mds->mds_epoch_sem);
153 if (atomic_read(&inode->i_writecount) < 0) {
154 up(&mds->mds_epoch_sem);
158 if (MDS_FILTERDATA(inode) && MDS_FILTERDATA(inode)->io_epoch != 0) {
159 CDEBUG(D_INODE, "continuing MDS epoch "LPU64" for ino %lu/%u\n",
160 MDS_FILTERDATA(inode)->io_epoch, inode->i_ino,
161 inode->i_generation);
165 if (MDS_FILTERDATA(inode) == NULL)
166 mds_alloc_filterdata(inode);
167 if (MDS_FILTERDATA(inode) == NULL) {
171 if (epoch > mds->mds_io_epoch) {
172 mds->mds_io_epoch = epoch;
173 CDEBUG(D_INODE, "repair MDS epoch "LPU64" for ino %lu/%u\n",
174 mds->mds_io_epoch, inode->i_ino, inode->i_generation);
177 CDEBUG(D_INODE, "starting MDS epoch "LPU64" for ino %lu/%u\n",
178 mds->mds_io_epoch, inode->i_ino, inode->i_generation);
180 MDS_FILTERDATA(inode)->io_epoch = mds->mds_io_epoch;
183 atomic_inc(&inode->i_writecount);
184 up(&mds->mds_epoch_sem);
188 /* Returns EAGAIN if the client needs to get size and/or cookies and close
189 * again -- which is never true if the file is about to be unlinked. Otherwise
190 * returns the number of remaining writers. */
191 static int mds_put_write_access(struct mds_obd *mds, struct inode *inode,
192 struct mds_body *body, int unlinking)
197 down(&mds->mds_epoch_sem);
198 atomic_dec(&inode->i_writecount);
199 rc = atomic_read(&inode->i_writecount);
203 if (!unlinking && !(body->valid & OBD_MD_FLSIZE))
204 GOTO(out, rc = EAGAIN);
206 mds_free_filterdata(inode);
208 up(&mds->mds_epoch_sem);
212 static int mds_deny_write_access(struct mds_obd *mds, struct inode *inode)
215 down(&mds->mds_epoch_sem);
216 if (atomic_read(&inode->i_writecount) > 0) {
217 up(&mds->mds_epoch_sem);
220 atomic_dec(&inode->i_writecount);
221 up(&mds->mds_epoch_sem);
225 static void mds_allow_write_access(struct inode *inode)
228 atomic_inc(&inode->i_writecount);
231 int mds_query_write_access(struct inode *inode)
234 RETURN(atomic_read(&inode->i_writecount));
237 /* This replaces the VFS dentry_open, it manages mfd and writecount */
238 static struct mds_file_data *mds_dentry_open(struct dentry *dentry,
239 struct vfsmount *mnt, int flags,
240 struct ptlrpc_request *req,
241 struct mds_update_record *rec)
243 struct mds_export_data *med = &req->rq_export->exp_mds_data;
244 struct mds_obd *mds = mds_req2mds(req);
245 struct mds_file_data *mfd;
246 struct mds_body *body;
252 CERROR("mds: out of memory\n");
253 GOTO(cleanup_dentry, rc = -ENOMEM);
256 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
258 if (flags & FMODE_WRITE) {
259 /* FIXME: in recovery, need to pass old epoch here */
260 rc = mds_get_write_access(mds, dentry->d_inode, rec->ur_ioepoch);
262 GOTO(cleanup_mfd, rc);
263 body->io_epoch = MDS_FILTERDATA(dentry->d_inode)->io_epoch;
264 } else if (flags & FMODE_EXEC) {
265 rc = mds_deny_write_access(mds, dentry->d_inode);
267 GOTO(cleanup_mfd, rc);
272 /* FIXME: invalidate update locks when first open for write comes in */
274 /* mark the file as open to handle open-unlink. */
275 DOWN_WRITE_I_ALLOC_SEM(dentry->d_inode);
276 mds_orphan_open_inc(dentry->d_inode);
277 UP_WRITE_I_ALLOC_SEM(dentry->d_inode);
279 mfd->mfd_mode = flags;
280 mfd->mfd_dentry = dentry;
281 mfd->mfd_xid = req->rq_xid;
283 spin_lock(&med->med_open_lock);
284 list_add(&mfd->mfd_list, &med->med_open_head);
285 spin_unlock(&med->med_open_lock);
288 body->handle.cookie = mfd->mfd_handle.h_cookie;
292 mds_mfd_destroy(mfd);
298 mds_objids_from_lmm(obd_id *ids, struct lov_mds_md *lmm,
299 struct lov_desc *desc)
303 for (i = 0; i < le32_to_cpu(lmm->lmm_stripe_count); i++) {
304 ids[le32_to_cpu(lmm->lmm_objects[i].l_ost_idx)] =
305 le64_to_cpu(lmm->lmm_objects[i].l_object_id);
309 /* must be called with i_sem held */
311 mds_create_objects(struct obd_device *obd, struct ptlrpc_request *req,
312 int offset, struct mds_update_record *rec,
313 struct dentry *dchild, void **handle,
316 struct inode *inode = dchild->d_inode;
317 struct mds_obd *mds = &obd->u.mds;
318 struct obd_trans_info oti = { 0 };
319 struct lov_stripe_md *lsm = NULL;
320 struct lov_mds_md *lmm = NULL;
321 int rc, lmm_bufsize, lmm_size;
322 struct obdo *oa = NULL;
323 struct mds_body *body;
327 if (rec->ur_flags & MDS_OPEN_DELAY_CREATE ||
328 !(rec->ur_flags & FMODE_WRITE))
331 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*body));
333 if (!S_ISREG(inode->i_mode))
335 if (body->valid & OBD_MD_FLEASIZE)
338 OBD_ALLOC(*ids, mds->mds_dt_desc.ld_tgt_count * sizeof(**ids));
341 oti.oti_objid = *ids;
344 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
345 LASSERT(id_ino(rec->ur_id2));
346 body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
347 lmm_size = rec->ur_eadatalen;
348 lmm = rec->ur_eadata;
352 *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
353 if (IS_ERR(*handle)) {
354 rc = PTR_ERR(*handle);
359 mds_objids_from_lmm(*ids, lmm, &mds->mds_dt_desc);
361 lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
362 lmm_bufsize = req->rq_repmsg->buflens[offset];
363 LASSERT(lmm_buf != NULL);
364 LASSERT(lmm_bufsize >= lmm_size);
366 memcpy(lmm_buf, lmm, lmm_size);
367 rc = fsfilt_set_md(obd, inode, *handle, lmm,
370 CERROR("open replay failed to set md:%d\n", rc);
374 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_ALLOC_OBDO))
375 GOTO(out_ids, rc = -ENOMEM);
380 oa->o_mode = S_IFREG | 0600;
381 oa->o_id = inode->i_ino;
382 oa->o_gr = FILTER_GROUP_FIRST_MDS + mds->mds_num;
383 oa->o_generation = inode->i_generation;
384 oa->o_uid = 0; /* must have 0 uid / gid on OST */
386 oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE |
387 OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLGROUP;
390 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
391 OBD_MD_FLMTIME | OBD_MD_FLCTIME);
393 if (!(rec->ur_flags & MDS_OPEN_HAS_OBJS)) {
394 /* check if things like lfs setstripe are sending us the ea */
395 if (rec->ur_flags & MDS_OPEN_HAS_EA) {
396 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
398 0, &lsm, rec->ur_eadata);
402 OBD_ALLOC(lmm, mds->mds_max_mdsize);
404 GOTO(out_oa, rc = -ENOMEM);
406 lmm_size = mds->mds_max_mdsize;
407 rc = mds_get_md(obd, dchild->d_parent->d_inode,
408 lmm, &lmm_size, 1, 0);
410 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
413 OBD_FREE(lmm, mds->mds_max_mdsize);
418 LASSERT(oa->o_gr >= FILTER_GROUP_FIRST_MDS);
419 oti.oti_flags |= OBD_MODE_CROW;
420 rc = obd_create(mds->mds_dt_exp, oa, NULL, 0, &lsm, &oti);
423 CDEBUG((rc == -ENOSPC ? D_INODE : D_ERROR),
424 "error creating objects for "
425 "inode %lu: rc = %d\n",
428 CERROR("obd_create returned invalid "
435 rc = obd_iocontrol(OBD_IOC_LOV_SETEA, mds->mds_dt_exp,
436 0, &lsm, rec->ur_eadata);
440 lsm->lsm_object_id = oa->o_id;
441 lsm->lsm_object_gr = oa->o_gr;
444 oa->o_size = inode->i_size;
445 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
446 OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLSIZE);
448 /* pack lustre id to oss */
449 *(obdo_id(oa)) = body->id1;
450 oa->o_valid |= OBD_MD_FLIFID;
452 rc = obd_setattr(mds->mds_dt_exp, oa, lsm, &oti, NULL);
454 CERROR("error setting attrs for inode %lu: rc %d\n",
457 CERROR("obd_setattr returned bad rc %d\n", rc);
464 body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
465 obdo_refresh_inode(inode, oa, OBD_MD_FLBLKSZ);
467 LASSERT(lsm && lsm->lsm_object_id);
469 rc = obd_packmd(mds->mds_dt_exp, &lmm, lsm);
470 if (!id_ino(rec->ur_id2))
471 obd_free_memmd(mds->mds_dt_exp, &lsm);
473 CERROR("cannot pack lsm, err = %d\n", rc);
478 body->eadatasize = rc;
481 *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
482 if (IS_ERR(*handle)) {
483 rc = PTR_ERR(*handle);
488 rc = fsfilt_set_md(obd, inode, *handle, lmm,
491 lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
492 lmm_bufsize = req->rq_repmsg->buflens[offset];
494 LASSERT(lmm_bufsize >= lmm_size);
496 memcpy(lmm_buf, lmm, lmm_size);
497 obd_free_diskmd(mds->mds_dt_exp, &lmm);
499 oti_free_cookies(&oti);
503 OBD_FREE(*ids, mds->mds_dt_desc.ld_tgt_count * sizeof(**ids));
507 obd_free_memmd(mds->mds_dt_exp, &lsm);
512 mds_destroy_object(struct obd_device *obd,
513 struct inode *inode, int async)
515 struct mds_obd *mds = &obd->u.mds;
516 struct lov_mds_md *lmm = NULL;
520 LASSERT(inode != NULL);
522 if (inode->i_nlink != 0) {
523 CDEBUG(D_INODE, "attempt to destroy OSS object when "
524 "i_nlink == %d\n", (int)inode->i_nlink);
528 OBD_ALLOC(lmm, mds->mds_max_mdsize);
532 lmm_size = mds->mds_max_mdsize;
533 rc = mds_get_md(obd, inode, lmm, &lmm_size, 1, 0);
535 CERROR("no stripe info for %lu/%lu inode\n",
536 (unsigned long)inode->i_ino,
537 (unsigned long)inode->i_generation);
538 GOTO(out_free_lmm, rc);
542 /* asynchronously unlink objecect on OSS */
543 rc = mds_unlink_object(mds, inode, lmm, lmm_size,
546 CERROR("error unlinking object on OSS, "
548 GOTO(out_free_lmm, rc);
551 CDEBUG(D_INODE, "no stripping info found for inode "
552 "%lu/%lu\n", (unsigned long)inode->i_ino,
553 (unsigned long)inode->i_generation);
557 OBD_FREE(lmm, mds->mds_max_mdsize);
561 static void reconstruct_open(struct mds_update_record *rec, int offset,
562 struct ptlrpc_request *req,
563 struct lustre_handle *child_lockh)
565 struct mds_export_data *med = &req->rq_export->exp_mds_data;
566 struct mds_client_data *mcd = med->med_mcd;
567 struct mds_obd *mds = mds_req2mds(req);
568 struct mds_file_data *mfd;
569 struct obd_device *obd = req->rq_export->exp_obd;
570 struct dentry *parent = NULL, *dchild;
571 struct ldlm_reply *rep;
572 struct mds_body *body;
578 LASSERT(offset == 3); /* only called via intent */
579 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
580 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
582 /* copy rc, transno and disp; steal locks */
583 mds_req_from_mcd(req, mcd);
584 intent_set_disposition(rep, mcd->mcd_last_data);
586 /* Only replay if create or open actually happened. */
587 if (!intent_disposition(rep, DISP_OPEN_CREATE | DISP_OPEN_OPEN) ) {
589 return; /* error looking up parent or child */
592 /* first, we try to open the file by fid. by the time of this
593 * request, inode can be an orphan and parent can disappear */
594 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
595 CDEBUG(D_HA, "OPEN by fid "DLID4" (RESENT|REPLAY)\n",
597 dchild = mds_id2dentry(obd, rec->ur_id2, NULL);
598 } else if (rec->ur_namelen == 1) {
599 CDEBUG(D_HA, "OPEN by fid "DLID4" (RESENT)\n",
601 dchild = mds_id2dentry(obd, rec->ur_id1, NULL);
603 parent = mds_id2dentry(obd, rec->ur_id1, NULL);
604 LASSERTF(!IS_ERR(parent), "lid "DLID4" rc %ld\n",
605 OLID4(rec->ur_id1), PTR_ERR(parent));
606 dchild = ll_lookup_one_len(rec->ur_name, parent,
607 rec->ur_namelen - 1);
608 LASSERTF(!IS_ERR(dchild), "parent "DLID4" child %s rc %ld\n",
609 OLID4(rec->ur_id1), rec->ur_name, PTR_ERR(dchild));
612 if (!dchild->d_inode)
613 GOTO(out_dput, 0); /* child not present to open */
615 /* At this point, we know we have a child. We'll send
616 * it back _unless_ it not created and open failed. */
617 if (intent_disposition(rep, DISP_OPEN_OPEN) &&
618 !intent_disposition(rep, DISP_OPEN_CREATE) &&
622 /* get lock (write for O_CREAT, read otherwise) */
623 mds_pack_inode2body(obd, body, dchild->d_inode, 1);
624 if (S_ISREG(dchild->d_inode->i_mode)) {
625 struct lustre_capa capa = {
626 .lc_uid = rec->ur_uc.luc_uid,
627 .lc_op = capa_op(rec->ur_flags),
628 .lc_ino = dchild->d_inode->i_ino,
629 .lc_igen = dchild->d_inode->i_generation,
630 .lc_mdsid = mds->mds_num,
632 int off = 7; /* capa offset */
634 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
635 dchild->d_inode, 1, 0);
638 LASSERT(rc == req->rq_status);
640 /* If we have LOV EA data, the OST holds size, mtime */
641 if (!(body->valid & OBD_MD_FLEASIZE))
642 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
643 OBD_MD_FLATIME | OBD_MD_FLMTIME);
644 rc = mds_pack_capa(obd, med, NULL, &capa, req, &off, body);
647 /* If we have -EEXIST as the status, and we were asked to create
648 * exclusively, we can tell we failed because the file already existed.
650 if (req->rq_status == -EEXIST &&
651 ((rec->ur_flags & (MDS_OPEN_CREAT | MDS_OPEN_EXCL)) ==
652 (MDS_OPEN_CREAT | MDS_OPEN_EXCL))) {
656 /* If we didn't get as far as trying to open, then some locking thing
657 * probably went wrong, and we'll just bail here.
659 if (!intent_disposition(rep, DISP_OPEN_OPEN))
662 /* If we failed, then we must have failed opening, so don't look for
663 * file descriptor or anything, just give the client the bad news.
669 list_for_each(t, &med->med_open_head) {
670 mfd = list_entry(t, struct mds_file_data, mfd_list);
671 if (mfd->mfd_xid == req->rq_xid)
676 /* #warning "XXX fixme" bug 2991 */
677 /* Here it used to LASSERT(mfd) if exp_outstanding_reply != NULL.
678 * Now that exp_outstanding_reply is a list, it's just using mfd != NULL
679 * to detect a re-open */
681 mntget(mds->mds_vfsmnt);
682 CERROR("Re-opened file \n");
683 mfd = mds_dentry_open(dchild, mds->mds_vfsmnt,
684 rec->ur_flags & ~MDS_OPEN_TRUNC, req, rec);
686 CERROR("mds: out of memory\n");
687 GOTO(out_dput, req->rq_status = -ENOMEM);
691 body->handle.cookie = mfd->mfd_handle.h_cookie;
692 CDEBUG(D_INODE, "resend mfd %p, cookie "LPX64"\n", mfd,
693 mfd->mfd_handle.h_cookie);
704 /* do NOT or the MAY_*'s, you'll get the weakest */
705 int accmode(int flags)
709 if (flags & FMODE_READ)
711 if (flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
713 if (flags & FMODE_EXEC)
718 /* Handles object creation, actual opening, and I/O epoch */
719 static int mds_finish_open(struct ptlrpc_request *req, struct dentry *dchild,
720 struct mds_body *body, int flags, void **handle,
721 struct mds_update_record *rec, struct ldlm_reply *rep,
722 int *cancel_update_lock)
724 struct obd_device *obd = req->rq_export->exp_obd;
725 struct mds_obd *mds = mds_req2mds(req);
726 struct mds_export_data *med = &req->rq_export->u.eu_mds_data;
727 struct mds_file_data *mfd = NULL;
730 int rc = 0, reply_off;
733 *cancel_update_lock = 0;
735 /* atomically create objects if necessary */
736 down(&dchild->d_inode->i_sem);
737 mode = dchild->d_inode->i_mode;
739 if ((S_ISREG(mode) && !(body->valid & OBD_MD_FLEASIZE)) ||
740 (S_ISDIR(mode) && !(body->valid & OBD_MD_FLDIREA))) {
741 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
742 dchild->d_inode, 0, 0);
744 up(&dchild->d_inode->i_sem);
750 if ((body->valid & OBD_MD_FLEASIZE) &&
751 (rec->ur_flags & MDS_OPEN_HAS_EA)) {
752 up(&dchild->d_inode->i_sem);
756 if (!(body->valid & OBD_MD_FLEASIZE)) {
757 /* no EA: create objects */
758 rc = mds_create_objects(obd, req, 2, rec,
759 dchild, handle, &ids);
761 CERROR("mds_create_object: rc = %d\n", rc);
762 up(&dchild->d_inode->i_sem);
767 if (S_ISREG(dchild->d_inode->i_mode) &&
768 (body->valid & OBD_MD_FLEASIZE)) {
770 rc = mds_revalidate_lov_ea(obd, dchild,
774 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
775 dchild->d_inode, 0, 0);
776 /* after ost add/delete, lov ea can change
777 * along with size/blocks, which we have
778 * to update as well */
780 body->size = dchild->d_inode->i_size;
781 body->blocks = dchild->d_inode->i_blocks;
782 *cancel_update_lock = 1;
786 up(&dchild->d_inode->i_sem);
793 rc = mds_pack_acl(req, reply_off, body, dchild->d_inode);
797 CERROR("pack posix acl: rc = %d\n", rc);
798 up(&dchild->d_inode->i_sem);
802 rc = mds_pack_gskey(obd, req->rq_repmsg, &reply_off, body,
805 CERROR("mds_pack_gskey: rc = %d\n", rc);
806 up(&dchild->d_inode->i_sem);
811 struct lustre_capa capa = {
812 .lc_uid = rec->ur_uc.luc_uid,
813 .lc_op = capa_op(rec->ur_flags),
814 .lc_ino = dchild->d_inode->i_ino,
815 .lc_igen = dchild->d_inode->i_generation,
816 .lc_mdsid = mds->mds_num,
819 rc = mds_pack_capa(obd, med, NULL, &capa, req,
822 CERROR("mds_pack_capa: rc = %d\n", rc);
823 up(&dchild->d_inode->i_sem);
830 /* If the inode has no EA data, then MDSs hold size, mtime */
831 if (S_ISREG(mode) && !(body->valid & OBD_MD_FLEASIZE)) {
832 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
833 OBD_MD_FLATIME | OBD_MD_FLMTIME);
836 up(&dchild->d_inode->i_sem);
838 intent_set_disposition(rep, DISP_OPEN_OPEN);
839 mfd = mds_dentry_open(dchild, mds->mds_vfsmnt, flags, req, rec);
841 RETURN(PTR_ERR(mfd));
843 CDEBUG(D_INODE, "mfd %p, cookie "LPX64"\n", mfd,
844 mfd->mfd_handle.h_cookie);
847 mds_dt_update_objids(obd, ids);
848 OBD_FREE(ids, sizeof(*ids) * mds->mds_dt_desc.ld_tgt_count);
854 static int mds_open_by_id(struct ptlrpc_request *req,
855 struct lustre_id *id,
856 struct mds_body *body, int flags,
857 struct mds_update_record *rec,
858 struct ldlm_reply *rep)
860 struct mds_obd *mds = mds_req2mds(req);
861 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
862 struct dentry *dchild;
863 char idname[LL_ID_NAMELEN];
864 int idlen = 0, rc, fake;
868 down(&pending_dir->i_sem);
869 idlen = ll_id2str(idname, id_ino(id), id_gen(id));
870 dchild = lookup_one_len(idname, mds->mds_pending_dir,
872 if (IS_ERR(dchild)) {
873 up(&pending_dir->i_sem);
874 rc = PTR_ERR(dchild);
875 CERROR("error looking up %s in PENDING: rc = %d\n",
880 up(&pending_dir->i_sem);
881 if (dchild->d_inode != NULL) {
882 mds_inode_set_orphan(dchild->d_inode);
883 mds_pack_inode2body(req2obd(req), body,
886 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
887 intent_set_disposition(rep, DISP_LOOKUP_POS);
888 CWARN("Orphan %s found and opened in PENDING directory\n",
894 /* we didn't find it in PENDING so it isn't an orphan. See if it was a
895 * regular inode that was previously created. */
896 dchild = mds_id2dentry(req2obd(req), id, NULL);
898 RETURN(PTR_ERR(dchild));
900 mds_pack_inode2body(req2obd(req), body,
903 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
904 intent_set_disposition(rep, DISP_LOOKUP_POS);
907 rc = mds_finish_open(req, dchild, body, flags, &handle, rec, rep,&fake);
908 rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
909 req, rc, rep ? rep->lock_policy_res1 : 0);
910 /* XXX what do we do here if mds_finish_transno itself failed? */
915 int mds_pin(struct ptlrpc_request *req, int offset)
917 struct obd_device *obd = req->rq_export->exp_obd;
918 struct mds_body *request_body, *reply_body;
919 struct lvfs_run_ctxt saved;
920 int rc, size = sizeof(*reply_body);
923 request_body = lustre_msg_buf(req->rq_reqmsg, offset,
924 sizeof(*request_body));
926 rc = lustre_pack_reply(req, 1, &size, NULL);
929 reply_body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply_body));
931 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
932 rc = mds_open_by_id(req, &request_body->id1, reply_body,
933 request_body->flags, NULL, NULL);
934 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
940 * get a lock on the ino to sync with creation WRT inode reuse (bug 2029). If
941 * child_lockh is NULL we just get the lock as a barrier to wait for other
942 * holders of this lock, and drop it right away again.
944 int mds_lock_new_child(struct obd_device *obd, struct inode *inode,
945 struct lustre_handle *child_lockh)
947 struct ldlm_res_id child_res_id = { .name = { inode->i_ino, 0, 1, 0 } };
948 struct lustre_handle lockh;
949 int lock_flags = LDLM_FL_ATOMIC_CB;
953 if (child_lockh == NULL)
954 child_lockh = &lockh;
956 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, child_res_id,
957 LDLM_PLAIN, NULL, LCK_EX, &lock_flags,
958 mds_blocking_ast, ldlm_completion_ast, NULL,
959 NULL, NULL, 0, NULL, child_lockh);
961 CERROR("ldlm_cli_enqueue: %d\n", rc);
962 else if (child_lockh == &lockh)
963 ldlm_lock_decref(child_lockh, LCK_EX);
968 int mds_open(struct mds_update_record *rec, int offset,
969 struct ptlrpc_request *req, struct lustre_handle *child_lockh)
971 /* XXX ALLOCATE _something_ - 464 bytes on stack here */
972 struct obd_device *obd = req->rq_export->exp_obd;
973 struct mds_export_data *med = &req->rq_export->u.eu_mds_data;
974 struct mds_obd *mds = mds_req2mds(req);
975 struct ldlm_reply *rep = NULL;
976 struct mds_body *body = NULL;
977 struct dentry *dchild = NULL, *dparent = NULL;
978 struct lustre_handle parent_lockh[2] = {{0}, {0}};
979 int rc = 0, cleanup_phase = 0, acc_mode, created = 0;
980 int parent_mode = LCK_PR;
982 struct dentry_params dp;
983 struct mea *mea = NULL;
984 int mea_size, update_mode;
985 int child_mode = LCK_PR;
986 struct lustre_id sid;
988 int cancel_update_lock;
991 DEBUG_REQ(D_INODE, req, "parent "DLID4" name %*s mode %o",
992 OLID4(rec->ur_id1), rec->ur_namelen - 1, rec->ur_name,
995 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PAUSE_OPEN | OBD_FAIL_ONCE,
996 (obd_timeout + 1) / 4);
998 if (offset == 3) { /* intent */
999 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
1000 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
1001 } else if (offset == 1) { /* non-intent reint */
1002 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
1008 MDS_CHECK_RESENT(req, reconstruct_open(rec, offset, req, child_lockh));
1011 * Step 0: If we are passed a id, then we assume the client already
1012 * opened this file and is only replaying the RPC, so we open the inode
1013 * by fid (at some large expense in security).
1015 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1016 CDEBUG(D_HA, "open obj "DLID4" name %*s mode %o\n",
1017 OLID4(rec->ur_id2), rec->ur_namelen - 1,
1018 rec->ur_name, rec->ur_mode);
1020 LASSERT(id_ino(rec->ur_id2));
1022 rc = mds_open_by_id(req, rec->ur_id2, body,
1023 rec->ur_flags, rec, rep);
1024 if (rc != -ENOENT) {
1025 mds_body_do_reverse_map(med, body);
1029 /* We didn't find the correct inode on disk either, so we
1030 * need to re-create it via a regular replay. */
1031 LASSERT(rec->ur_flags & MDS_OPEN_CREAT);
1033 LASSERT(!id_ino(rec->ur_id2));
1036 LASSERT(offset == 3); /* If we got here, we must be called via intent */
1038 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) {
1039 CERROR("test case OBD_FAIL_MDS_OPEN_PACK\n");
1043 acc_mode = accmode(rec->ur_flags);
1045 /* Step 1: Find and lock the parent */
1046 if (rec->ur_flags & MDS_OPEN_CREAT) {
1047 /* XXX Well, in fact we only need this lock mode change if
1048 in addition to O_CREAT, the file does not exist.
1049 But we do not know if it exists or not yet */
1050 parent_mode = LCK_PW;
1053 if (rec->ur_namelen == 1) {
1054 /* client (LMV) wants to open the file by id */
1055 CDEBUG(D_OTHER, "OPEN by id "DLID4"\n", OLID4(rec->ur_id1));
1056 dchild = mds_id2dentry(obd, rec->ur_id1, NULL);
1057 if (IS_ERR(dchild)) {
1058 rc = PTR_ERR(dparent);
1059 CERROR("child lookup by an id error %d\n", rc);
1066 dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, parent_mode,
1067 parent_lockh, &update_mode, rec->ur_name,
1068 rec->ur_namelen - 1, MDS_INODELOCK_UPDATE);
1069 if (IS_ERR(dparent)) {
1070 rc = PTR_ERR(dparent);
1071 if (rc != -ENOENT) {
1072 CERROR("parent lookup for "DLID4" failed, error %d\n",
1073 OLID4(rec->ur_id1), rc);
1075 /* Just cannot find parent - make it look like
1076 usual negative lookup to avoid extra MDS RPC */
1077 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1078 intent_set_disposition(rep, DISP_LOOKUP_NEG);
1082 LASSERT(dparent->d_inode != NULL);
1084 cleanup_phase = 1; /* parent dentry and lock */
1086 /* try to retrieve MEA data for this dir */
1087 rc = mds_md_get_attr(obd, dparent->d_inode, &mea, &mea_size);
1091 if (mea != NULL && mea->mea_count) {
1093 * dir is already splitted, check is requested filename should *
1094 * live at this MDS or at another one.
1097 i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
1098 if (mea->mea_master != id_group(&mea->mea_ids[i])) {
1100 "%s: inapropriate MDS(%d) for %lu/%u:%s."
1101 " should be %lu(%d)\n", obd->obd_name,
1102 mea->mea_master, dparent->d_inode->i_ino,
1103 dparent->d_inode->i_generation, rec->ur_name,
1104 (unsigned long)id_group(&mea->mea_ids[i]), i);
1105 GOTO(cleanup, rc = -ERESTART);
1109 /* Step 2: Lookup the child */
1110 dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1);
1111 if (IS_ERR(dchild)) {
1112 rc = PTR_ERR(dchild);
1113 dchild = NULL; /* don't confuse mds_finish_transno() below */
1118 cleanup_phase = 2; /* child dentry */
1120 if (dchild->d_flags & DCACHE_CROSS_REF) {
1121 CDEBUG(D_OTHER, "cross reference: "DLID4"\n", OLID4(rec->ur_id1));
1122 LASSERT(rec->ur_namelen > 1);
1124 /* we're gonna acquire LOOKUP lock on the child,
1125 * but we have already locked parent and our order
1126 * may conflict with enqueue_order_locks(). so,
1127 * drop parent lock and acquire both the locks in
1128 * common order. bug 6190 */
1130 if (parent_lockh[1].cookie != 0)
1131 ldlm_lock_decref(parent_lockh + 1, update_mode);
1133 ldlm_lock_decref(parent_lockh, parent_mode);
1138 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1,
1139 parent_lockh, &dparent,
1140 LCK_PR, MDS_INODELOCK_UPDATE,
1141 &update_mode, rec->ur_name,
1142 rec->ur_namelen, child_lockh,
1144 MDS_INODELOCK_LOOKUP);
1150 if (parent_lockh[1].cookie != 0)
1151 ldlm_lock_decref(parent_lockh + 1, update_mode);
1153 ldlm_lock_decref(parent_lockh, LCK_PR);
1155 if (dchild->d_inode || !(dchild->d_flags & DCACHE_CROSS_REF)) {
1156 CDEBUG(D_OTHER, "race: name changed (%p)\n",
1158 if (dchild->d_inode)
1159 ldlm_lock_decref(child_lockh, LCK_PR);
1165 mds_pack_dentry2body(obd, body, dchild, 1);
1166 intent_set_disposition(rep, DISP_LOOKUP_POS);
1167 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1170 OBD_FREE(mea, mea_size);
1176 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1178 if (dchild->d_inode)
1179 intent_set_disposition(rep, DISP_LOOKUP_POS);
1181 intent_set_disposition(rep, DISP_LOOKUP_NEG);
1183 /* Step 3: If the child was negative, and we're supposed to, create it.*/
1184 if (dchild->d_inode == NULL) {
1187 struct inode *inode;
1189 /* get parent id: ldlm lock on the parent protects ea */
1190 rc = mds_read_inode_sid(obd, dparent->d_inode, &sid);
1192 CERROR("can't read parent inode id. ino(%lu) rc(%d)\n",
1193 dparent->d_inode->i_ino, rc);
1197 ino = (unsigned long)id_ino(rec->ur_id2);
1199 rc = mds_try_to_split_dir(obd, dparent, &mea, 0,
1202 CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d\n",
1203 obd->obd_name, dparent->d_inode->i_ino,
1204 dparent->d_inode->i_generation, rc);
1207 /* dir got splitted */
1208 GOTO(cleanup, rc = -ERESTART);
1209 } else if (rc < 0) {
1210 /* error happened during spitting */
1214 if (!(rec->ur_flags & MDS_OPEN_CREAT)) {
1216 * dentry is negative and we weren't supposed to create
1217 * object, get out of here.
1219 GOTO(cleanup, rc = -ENOENT);
1222 intent_set_disposition(rep, DISP_OPEN_CREATE);
1223 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_CREATE,
1225 if (IS_ERR(handle)) {
1226 rc = PTR_ERR(handle);
1230 if (id_fid(rec->ur_id2))
1231 fid = id_fid(rec->ur_id2);
1233 fid = mds_alloc_fid(obd);
1235 dchild->d_fsdata = (void *) &dp;
1240 dp.p_group = mds->mds_num;
1242 rc = ll_vfs_create(dparent->d_inode, dchild, rec->ur_mode, NULL);
1243 if (dchild->d_fsdata == (void *)(unsigned long)ino)
1244 dchild->d_fsdata = NULL;
1247 CDEBUG(D_INODE, "error during create: %d\n", rc);
1251 inode = dchild->d_inode;
1254 LASSERT(ino == inode->i_ino);
1256 /* written as part of setattr */
1257 inode->i_generation = id_gen(rec->ur_id2);
1258 CDEBUG(D_HA, "recreated ino %lu with gen %u\n",
1259 inode->i_ino, inode->i_generation);
1263 LTIME_S(iattr.ia_atime) = rec->ur_time;
1264 LTIME_S(iattr.ia_ctime) = rec->ur_time;
1265 LTIME_S(iattr.ia_mtime) = rec->ur_time;
1267 iattr.ia_uid = rec->ur_fsuid;
1268 if (dparent->d_inode->i_mode & S_ISGID)
1269 iattr.ia_gid = dparent->d_inode->i_gid;
1271 iattr.ia_gid = rec->ur_fsgid;
1273 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
1274 ATTR_MTIME | ATTR_CTIME;
1276 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
1278 CERROR("error on child setattr: rc = %d\n", rc);
1280 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
1282 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
1284 CERROR("error on parent setattr: rc = %d\n", rc);
1286 MD_COUNTER_INCREMENT(obd, create);
1289 mds_inode2id(obd, &body->id1, inode, fid);
1290 mds_update_inode_ids(obd, dchild->d_inode, handle, &body->id1, &sid);
1292 if ((rec->ur_flags & MDS_OPEN_HAS_KEY)) {
1293 rc = mds_set_gskey(obd, handle, dchild->d_inode,
1294 rec->ur_ea2data, rec->ur_ea2datalen,
1295 ATTR_KEY | ATTR_MAC);
1297 CERROR("error in set gs key rc %d\n", rc);
1301 rc = fsfilt_commit(obd, dchild->d_inode->i_sb, dchild->d_inode, handle, 0);
1303 acc_mode = 0; /* Don't check for permissions */
1305 mds_pack_inode2body(obd, body, dchild->d_inode, 1);
1307 LASSERTF(!mds_inode_is_orphan(dchild->d_inode),
1308 "dchild %.*s (%p) inode %p\n", dchild->d_name.len,
1309 dchild->d_name.name, dchild, dchild->d_inode);
1311 if (S_ISREG(dchild->d_inode->i_mode)) {
1312 /* Check permissions etc */
1313 rc = ll_permission(dchild->d_inode, acc_mode, NULL);
1317 /* Can't write to a read-only file */
1318 if (IS_RDONLY(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0)
1319 GOTO(cleanup, rc = -EPERM);
1321 /* An append-only file must be opened in append mode for
1323 if (IS_APPEND(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0 &&
1324 ((rec->ur_flags & MDS_OPEN_APPEND) == 0 ||
1325 (rec->ur_flags & MDS_OPEN_TRUNC) != 0))
1326 GOTO(cleanup, rc = -EPERM);
1329 if (!created && (rec->ur_flags & MDS_OPEN_CREAT) &&
1330 (rec->ur_flags & MDS_OPEN_EXCL)) {
1331 /* File already exists, we didn't just create it, and we
1332 * were passed O_EXCL; err-or. */
1333 GOTO(cleanup, rc = -EEXIST); // returns a lock to the client
1336 if (S_ISDIR(dchild->d_inode->i_mode)) {
1337 if (rec->ur_flags & MDS_OPEN_CREAT ||
1338 rec->ur_flags & FMODE_WRITE) {
1339 /* we are trying to create or write a exist dir */
1340 GOTO(cleanup, rc = -EISDIR);
1342 if (ll_permission(dchild->d_inode, acc_mode, NULL))
1343 GOTO(cleanup, rc = -EACCES);
1346 * here was checking for possible GNS mount points to skip their
1347 * open. I removed it as its detection based only on SUID bit is
1348 * not reliable. Opening such a dirs should not cause any
1349 * problems, at least tests show that. --umka
1353 /* if we are following a symlink, don't open */
1354 if (S_ISLNK(dchild->d_inode->i_mode))
1355 GOTO(cleanup_no_trans, rc = 0);
1357 if ((rec->ur_flags & MDS_OPEN_DIRECTORY) &&
1358 !S_ISDIR(dchild->d_inode->i_mode))
1359 GOTO(cleanup, rc = -ENOTDIR);
1361 /* check permission even it's special files */
1362 if (S_ISCHR(dchild->d_inode->i_mode) ||
1363 S_ISBLK(dchild->d_inode->i_mode) ||
1364 S_ISFIFO(dchild->d_inode->i_mode) ||
1365 S_ISSOCK(dchild->d_inode->i_mode)) {
1366 rc = ll_permission(dchild->d_inode, acc_mode, NULL);
1371 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_CREATE)) {
1372 obd_fail_loc = OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE;
1373 GOTO(cleanup, rc = -EAGAIN);
1377 /* We cannot use acc_mode here, because it is zeroed in case of
1378 creating a file, so we get wrong lockmode */
1379 if (accmode(rec->ur_flags) & MAY_WRITE)
1380 child_mode = LCK_CW;
1381 else if (accmode(rec->ur_flags) & MAY_EXEC)
1382 child_mode = LCK_PR;
1384 child_mode = LCK_CR;
1386 /* Always returning LOOKUP lock if open succesful to guard
1387 * dentry on client. In case of replay we do not get a lock
1388 * assuming that the caller has it already */
1389 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)) {
1390 struct ldlm_res_id child_res_id = { .name = {0}};
1391 ldlm_policy_data_t policy;
1392 int lock_flags = LDLM_FL_ATOMIC_CB;
1394 /* LOOKUP lock will protect dentry on client -bzzz */
1395 policy.l_inodebits.bits = MDS_INODELOCK_LOOKUP |
1398 child_res_id.name[0] = id_fid(&body->id1);
1399 child_res_id.name[1] = id_group(&body->id1);
1401 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1402 child_res_id, LDLM_IBITS, &policy,
1403 child_mode, &lock_flags,
1404 mds_blocking_ast, ldlm_completion_ast,
1405 NULL, NULL, NULL, 0, NULL, child_lockh);
1412 /* re-enable test 24n in sanity.sh: it needs LOOKUP lock on open */
1415 /* Step 5: mds_open it */
1416 rc = mds_finish_open(req, dchild, body, rec->ur_flags, &handle,
1417 rec, rep, &cancel_update_lock);
1421 /* reintegration case */
1422 if ((rec->ur_flags & MDS_REINT_REQ)) {
1423 rc = mds_fidmap_add(obd, &body->id1);
1425 CERROR("can't create fid->ino mapping, err %d\n",
1432 /* if this is a writer, we have to invalidate client's
1433 * update locks in order to make sure they don't use
1434 * isize/iblocks from mds anymore.
1435 * FIXME: can cause a deadlock, use mds_get_parent_child_locked()
1436 * XXX: optimization is to do this for first writer only */
1437 if ((accmode(rec->ur_flags) & MAY_WRITE) || cancel_update_lock) {
1438 struct ldlm_res_id child_res_id = { .name = {0}};
1439 ldlm_policy_data_t sz_policy;
1440 struct lustre_handle sz_lockh;
1441 int lock_flags = LDLM_FL_ATOMIC_CB;
1443 child_res_id.name[0] = id_fid(&body->id1);
1444 child_res_id.name[1] = id_group(&body->id1);
1445 sz_policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1447 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1448 child_res_id, LDLM_IBITS, &sz_policy,
1449 LCK_PW, &lock_flags, mds_blocking_ast,
1450 ldlm_completion_ast, NULL, NULL, NULL,
1451 0, NULL, &sz_lockh);
1453 ldlm_lock_decref(&sz_lockh, LCK_PW);
1455 CERROR("can't invalidate client's update locks\n");
1460 rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
1461 req, rc, rep ? rep->lock_policy_res1 : 0);
1464 switch (cleanup_phase) {
1467 ldlm_lock_decref(child_lockh, child_mode);
1468 child_lockh->cookie = 0;
1471 if (rc && created) {
1472 int err = vfs_unlink(dparent->d_inode, dchild);
1474 CERROR("unlink(%.*s) in error path: %d\n",
1475 dchild->d_name.len, dchild->d_name.name,
1478 } else if (created) {
1479 mds_lock_new_child(obd, dchild->d_inode, NULL);
1481 /* audit stuff for OPEN */
1483 mds_audit(req, dchild, rec->ur_name,
1484 rec->ur_namelen - 1, AUDIT_OPEN, rc);
1489 if (dparent == NULL)
1494 if (parent_lockh[1].cookie != 0)
1495 ldlm_lock_decref(parent_lockh + 1, update_mode);
1498 ldlm_lock_decref(parent_lockh, parent_mode);
1500 ptlrpc_save_lock (req, parent_lockh, parent_mode);
1503 OBD_FREE(mea, mea_size);
1505 atomic_inc(&mds->mds_open_count);
1507 mds_body_do_reverse_map(med, body);
1510 * If we have not taken the "open" lock, we may not return 0 here,
1511 * because caller expects 0 to mean "lock is taken", and it needs
1512 * nonzero return here for caller to return EDLM_LOCK_ABORTED to
1513 * client. Later caller should rewrite the return value back to zero
1514 * if it to be used any further.
1516 if ((cleanup_phase != 3) && !rc)
1522 /* Close a "file descriptor" and possibly unlink an orphan from the
1523 * PENDING directory. Caller must hold child->i_sem, this drops it.
1525 * If we are being called from mds_disconnect() because the client has
1526 * disappeared, then req == NULL and we do not update last_rcvd because
1527 * there is nothing that could be recovered by the client at this stage
1528 * (it will not even _have_ an entry in last_rcvd anymore).
1530 * Returns EAGAIN if the client needs to get more data and re-close. */
1531 int mds_mfd_close(struct ptlrpc_request *req, int offset,
1532 struct obd_device *obd, struct mds_file_data *mfd,
1535 struct inode *inode = mfd->mfd_dentry->d_inode;
1536 char idname[LL_ID_NAMELEN];
1537 int last_orphan, idlen, rc = 0, cleanup_phase = 0;
1538 struct dentry *pending_child = NULL;
1539 struct mds_obd *mds = &obd->u.mds;
1540 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1541 void *handle = NULL;
1542 struct mds_body *request_body = NULL, *reply_body = NULL;
1543 struct dentry_params dp;
1544 struct iattr iattr = { 0 };
1545 struct llog_create_locks *lcl = NULL;
1548 if (req && req->rq_reqmsg != NULL)
1549 request_body = lustre_msg_buf(req->rq_reqmsg, offset,
1550 sizeof(*request_body));
1551 if (req && req->rq_repmsg != NULL)
1552 reply_body = lustre_msg_buf(req->rq_repmsg, 0,
1553 sizeof(*reply_body));
1555 if (request_body && (request_body->valid & OBD_MD_FLSIZE)) {
1556 /* we set i_size/i_blocks here, nobody will see
1557 * them until all write references are dropped.
1558 * btw, we hold one reference */
1559 LASSERT(mfd->mfd_mode & FMODE_WRITE);
1560 LASSERT(request_body->valid & OBD_MD_FLEPOCH);
1561 LASSERT(MDS_FILTERDATA(inode));
1562 if (MDS_FILTERDATA(inode)->io_epoch != request_body->io_epoch)
1563 CDEBUG(D_ERROR, "try to update attr. for old epoch "
1564 LPD64" while current "LPD64"\n",
1565 MDS_FILTERDATA(inode)->io_epoch,
1566 request_body->io_epoch);
1567 i_size_write(inode, request_body->size);
1568 inode->i_blocks = request_body->blocks;
1569 LTIME_S(inode->i_mtime) = (request_body->mtime);
1571 LTIME_S(iattr.ia_mtime) = request_body->mtime;
1572 iattr.ia_size = inode->i_size;
1573 iattr.ia_valid |= ATTR_SIZE|ATTR_MTIME;
1574 mds_inode_unset_attrs_old(inode);
1577 idlen = ll_id2str(idname, inode->i_ino, inode->i_generation);
1578 CDEBUG(D_INODE, "inode %p ino %s nlink %d orphan %d\n", inode,
1579 idname, inode->i_nlink, mds_orphan_open_count(inode));
1581 last_orphan = mds_orphan_open_dec_test(inode) &&
1582 mds_inode_is_orphan(inode);
1583 UP_WRITE_I_ALLOC_SEM(inode);
1585 /* this is half of the actual "close" */
1586 if (mfd->mfd_mode & FMODE_WRITE) {
1587 rc = mds_put_write_access(mds, inode, request_body,
1588 last_orphan && unlink_orphan);
1589 } else if (mfd->mfd_mode & FMODE_EXEC) {
1590 mds_allow_write_access(inode);
1593 if (last_orphan && unlink_orphan) {
1594 struct lov_mds_md *lmm = NULL;
1595 int stripe_count = 0;
1596 LASSERT(rc == 0); /* mds_put_write_access must have succeeded */
1598 CDEBUG(D_HA, "destroying orphan object %s\n", idname);
1600 if ((S_ISREG(inode->i_mode) && inode->i_nlink != 1) ||
1601 (S_ISDIR(inode->i_mode) && inode->i_nlink != 2))
1602 CERROR("found \"orphan\" %s %s with link count %d\n",
1603 S_ISREG(inode->i_mode) ? "file" : "dir",
1604 idname, inode->i_nlink);
1606 * sadly, there is no easy way to save pending_child from
1607 * mds_reint_unlink() into mfd, so we need to re-lookup, but
1608 * normally it will still be in the dcache.
1610 down(&pending_dir->i_sem);
1611 cleanup_phase = 1; /* up(i_sem) when finished */
1612 pending_child = lookup_one_len(idname, mds->mds_pending_dir,
1614 if (IS_ERR(pending_child))
1615 GOTO(cleanup, rc = PTR_ERR(pending_child));
1616 if (pending_child->d_inode == NULL) {
1617 CERROR("orphan %s has been removed\n", idname);
1618 GOTO(cleanup, rc = 0);
1621 cleanup_phase = 2; /* dput(pending_child) when finished */
1622 if (S_ISDIR(pending_child->d_inode->i_mode)) {
1623 rc = vfs_rmdir(pending_dir, pending_child);
1625 CERROR("error unlinking orphan dir %s: rc %d\n",
1630 if (req != NULL && req->rq_repmsg != NULL) {
1631 lmm = lustre_msg_buf(req->rq_repmsg, 1, 0);
1632 stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
1635 handle = fsfilt_start_log(obd, pending_dir, FSFILT_OP_UNLINK,
1636 NULL, stripe_count);
1637 if (IS_ERR(handle)) {
1638 rc = PTR_ERR(handle);
1643 pending_child->d_fsdata = (void *) &dp;
1646 rc = vfs_unlink(pending_dir, pending_child);
1648 CERROR("error unlinking orphan %s: rc %d\n",
1651 if (req != NULL && req->rq_repmsg != NULL &&
1652 (reply_body->valid & OBD_MD_FLEASIZE) &&
1653 mds_log_op_unlink(obd, pending_child->d_inode,
1654 lmm, req->rq_repmsg->buflens[1],
1655 lustre_msg_buf(req->rq_repmsg, 2, 0),
1656 req->rq_repmsg->buflens[2], &lcl) > 0) {
1657 reply_body->valid |= OBD_MD_FLCOOKIE;
1660 rc = mds_destroy_object(obd, inode, 1);
1662 CERROR("cannot destroy OSS object on close, err %d\n",
1667 goto out; /* Don't bother updating attrs on unlinked inode */
1668 } else if ((mfd->mfd_mode & FMODE_WRITE) && rc == 0) {
1669 /* last writer closed file - let's update i_size/i_blocks */
1670 mds_validate_size(obd, inode, request_body, NULL, &iattr);
1674 if (request_body != NULL && mfd->mfd_mode & FMODE_WRITE && rc == 0) {
1675 /* Update the on-disk attributes if this was the last write
1676 * close, and all information was provided (i.e., rc == 0)
1678 * XXX this should probably be abstracted with mds_reint_setattr
1681 if (request_body->valid & OBD_MD_FLMTIME &&
1682 LTIME_S(request_body->mtime) > LTIME_S(inode->i_mtime)) {
1683 LTIME_S(iattr.ia_mtime) = LTIME_S(request_body->mtime);
1684 iattr.ia_valid |= ATTR_MTIME;
1686 if (request_body->valid & OBD_MD_FLCTIME &&
1687 LTIME_S(request_body->ctime) > LTIME_S(inode->i_ctime)) {
1688 LTIME_S(iattr.ia_ctime) = LTIME_S(request_body->ctime);
1689 iattr.ia_valid |= ATTR_CTIME;
1692 /* XXX can't set block count with fsfilt_setattr (!) */
1693 if (request_body->valid & OBD_MD_FLSIZE) {
1694 iattr.ia_valid |= ATTR_SIZE;
1695 iattr.ia_size = request_body->size;
1697 /* if (request_body->valid & OBD_MD_FLBLOCKS) {
1698 iattr.ia_valid |= ATTR_BLOCKS;
1699 iattr.ia_blocks = request_body->blocks
1704 if (request_body != NULL && request_body->valid & OBD_MD_FLATIME) {
1705 /* Only start a transaction to write out only the atime if
1706 * it is more out-of-date than the specified limit. If we
1707 * are already going to write out the atime then do it anyway.
1709 if ((request_body->atime >
1710 LTIME_S(inode->i_atime) + MAX_ATIME_DIFF) ||
1711 (iattr.ia_valid != 0 &&
1712 request_body->atime > LTIME_S(inode->i_atime))) {
1713 LTIME_S(iattr.ia_atime) = request_body->atime;
1714 iattr.ia_valid |= ATTR_ATIME;
1718 if (iattr.ia_valid != 0) {
1720 handle = fsfilt_start(obd,inode,FSFILT_OP_SETATTR,NULL);
1722 GOTO(cleanup, rc = PTR_ERR(handle));
1723 rc = fsfilt_setattr(obd, mfd->mfd_dentry, handle, &iattr, 0);
1725 CERROR("error in setattr(%s): rc %d\n", idname, rc);
1728 /* If other clients have this file open for write, rc will be > 0 */
1731 if (!obd->obd_recovering && mds_inode_has_old_attrs(inode)
1732 && !mds_inode_is_orphan(inode)
1733 && atomic_read(&inode->i_writecount) == 0
1734 && inode->i_nlink != 0) {
1735 CERROR("leave inode %lu/%u with old attributes (nlink = %d)\n",
1736 inode->i_ino, inode->i_generation, inode->i_nlink);
1738 l_dput(mfd->mfd_dentry);
1739 mds_mfd_destroy(mfd);
1742 atomic_dec(&mds->mds_open_count);
1743 if (req != NULL && reply_body != NULL) {
1744 rc = mds_finish_transno(mds, pending_dir, handle, req, rc, 0);
1745 } else if (handle) {
1746 int err, force_sync = 0;
1748 if (req && req->rq_export)
1749 force_sync = req->rq_export->exp_sync;
1751 err = fsfilt_commit(obd, mds->mds_sb, pending_dir, handle,
1754 CERROR("error committing close: %d\n", err);
1760 switch (cleanup_phase) {
1763 ptlrpc_save_llog_lock(req, lcl);
1764 dput(pending_child);
1766 up(&pending_dir->i_sem);
1771 static int mds_extent_lock_callback(struct ldlm_lock *lock,
1772 struct ldlm_lock_desc *new, void *data,
1775 struct lustre_handle lockh = { 0 };
1780 case LDLM_CB_BLOCKING:
1781 ldlm_lock2handle(lock, &lockh);
1782 rc = ldlm_cli_cancel(&lockh);
1784 CERROR("ldlm_cli_cancel failed: %d\n", rc);
1786 case LDLM_CB_CANCELING: {
1795 __u64 lov_merge_size(struct lov_stripe_md *lsm, int kms);
1796 __u64 lov_merge_blocks(struct lov_stripe_md *lsm);
1797 __u64 lov_merge_mtime(struct lov_stripe_md *lsm, __u64 current_time);
1799 int mds_validate_size(struct obd_device *obd, struct inode *inode,
1800 struct mds_body *body, struct lov_stripe_md *lsm,
1801 struct iattr *iattr)
1803 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
1804 struct lustre_handle lockh = { 0 };
1805 int rc, len = 0, flags;
1809 /* we update i_size/i_blocks only for regular files */
1810 if (!S_ISREG(inode->i_mode))
1813 /* we shouldn't fetch size from OSTes during recovery - deadlock */
1814 if (obd->obd_recovering) {
1815 CERROR("size-on-mds has no support on OST yet\n");
1819 /* if nobody modified attrs. we're lucky */
1820 if (!mds_inode_has_old_attrs(inode))
1823 /* 1: client didn't send actual i_size/i_blocks
1824 * 2: we seem to be last writer
1825 * 3: the file doesn't look like to be disappeared
1826 * conclusion: we're gonna fetch them from OSSes */
1831 down(&inode->i_sem);
1832 len = fsfilt_get_md(obd, inode, NULL, 0, EA_LOV);
1836 CERROR("error getting inode %lu MD: %d\n", inode->i_ino, len);
1837 GOTO(cleanup, rc = len);
1838 } else if (len == 0) {
1839 CDEBUG(D_INODE, "no LOV in inode %lu\n", inode->i_ino);
1840 GOTO(cleanup, rc = 0);
1843 OBD_ALLOC(lmm, len);
1845 CERROR("can't allocate memory\n");
1846 GOTO(cleanup, rc = -ENOMEM);
1849 down(&inode->i_sem);
1850 rc = fsfilt_get_md(obd, inode, lmm, len, EA_LOV);
1854 CERROR("error getting inode %lu MD: %d\n", inode->i_ino, rc);
1858 rc = obd_unpackmd(obd->u.mds.mds_dt_exp, &lsm, lmm, len);
1860 CERROR("error getting inode %lu MD: %d\n", inode->i_ino, rc);
1866 CDEBUG(D_DLMTRACE, "Glimpsing inode %lu\n", inode->i_ino);
1868 flags = LDLM_FL_HAS_INTENT;
1869 rc = obd_enqueue(obd->u.mds.mds_dt_exp, lsm, LDLM_EXTENT, &policy,
1870 LCK_PR, &flags, mds_extent_lock_callback,
1871 ldlm_completion_ast, NULL, NULL,
1872 sizeof(struct ost_lvb), lustre_swab_ost_lvb, &lockh);
1873 if (rc == -ENOENT) {
1874 /* while we were enqueueing lock on OST, another thread
1875 * unlinked the file and started OST object destoying.
1876 * it's safe to return 0 here */
1877 GOTO(cleanup, rc = 0);
1878 } else if (rc != 0) {
1879 CERROR("obd_enqueue returned rc %d, returning -EIO\n", rc);
1884 CDEBUG(D_INODE, ""DLID4"\n", OLID4(&body->id1));
1886 CDEBUG(D_INODE, "LOV reports "LPD64"/%lu [%s%s%s]\n",
1887 inode->i_size, inode->i_blocks,
1888 atomic_read(&inode->i_writecount) > 1 ? "U" : "",
1889 mds_inode_has_old_attrs(inode) ? "D" : "",
1890 mds_inode_is_orphan(inode) ? "O" : "");
1892 i_size_write(inode, lov_merge_size(lsm, 0));
1893 inode->i_blocks = lov_merge_blocks(lsm);
1894 LTIME_S(inode->i_mtime) = lov_merge_mtime(lsm, LTIME_S(inode->i_mtime));
1895 iattr->ia_size = inode->i_size;
1896 LTIME_S(iattr->ia_mtime) = LTIME_S(inode->i_mtime);
1897 iattr->ia_valid |= ATTR_SIZE | ATTR_MTIME;
1899 DOWN_WRITE_I_ALLOC_SEM(inode);
1900 mds_inode_unset_attrs_old(inode);
1901 UP_WRITE_I_ALLOC_SEM(inode);
1903 obd_cancel(obd->u.mds.mds_dt_exp, lsm, LCK_PR, &lockh);
1908 obd_free_memmd(obd->u.mds.mds_dt_exp, &lsm);
1914 int mds_close(struct ptlrpc_request *req, int offset)
1916 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1917 struct obd_device *obd = req->rq_export->exp_obd;
1918 struct mds_body *body;
1919 struct mds_file_data *mfd;
1920 struct lvfs_run_ctxt saved;
1921 struct inode *inode;
1922 int rc, repsize[3] = {sizeof(struct mds_body),
1923 obd->u.mds.mds_max_mdsize,
1924 obd->u.mds.mds_max_cookiesize};
1926 MD_COUNTER_INCREMENT(obd, close);
1928 rc = lustre_pack_reply(req, 3, repsize, NULL);
1930 CERROR("lustre_pack_reply: rc = %d\n", rc);
1931 req->rq_status = rc;
1933 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1936 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1937 DEBUG_REQ(D_HA, req, "close replay");
1938 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
1939 lustre_msg_buf(req->rq_reqmsg, offset + 1, 0),
1940 req->rq_repmsg->buflens[2]);
1943 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1944 lustre_swab_mds_body);
1946 CERROR("Can't unpack body\n");
1947 req->rq_status = -EFAULT;
1951 if (body->flags & MDS_BFLAG_UNCOMMITTED_WRITES)
1952 /* do some stuff */ ;
1954 mfd = mds_handle2mfd(&body->handle);
1956 DEBUG_REQ(D_ERROR, req, "no handle for file close ino "LPD64
1957 ": cookie "LPX64, id_ino(&body->id1), body->handle.cookie);
1958 req->rq_status = -ESTALE;
1962 inode = mfd->mfd_dentry->d_inode;
1964 /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
1965 DOWN_WRITE_I_ALLOC_SEM(inode); /* mds_mfd_close drops this */
1967 if (body->flags & MDS_BFLAG_DIRTY_EPOCH) {
1968 /* the client modified data through the handle
1969 * we need to care about attrs. -bzzz */
1970 mds_inode_set_attrs_old(inode);
1973 if (mds_inode_is_orphan(inode) && mds_orphan_open_count(inode) == 1) {
1974 struct mds_body *rep_body;
1976 rep_body = lustre_msg_buf(req->rq_repmsg, 0,
1977 sizeof (*rep_body));
1978 LASSERT(rep_body != NULL);
1980 mds_pack_inode2body(obd, rep_body, inode,
1981 (body->valid & OBD_MD_FID) ? 1 : 0);
1983 mds_pack_md(obd, req->rq_repmsg, 1, rep_body,
1984 inode, MDS_PACK_MD_LOCK, 0);
1986 spin_lock(&med->med_open_lock);
1987 list_del(&mfd->mfd_list);
1988 spin_unlock(&med->med_open_lock);
1990 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1991 req->rq_status = mds_mfd_close(req, offset, obd, mfd, 1);
1992 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1994 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) {
1995 CERROR("test case OBD_FAIL_MDS_CLOSE_PACK\n");
1996 req->rq_status = -ENOMEM;
2006 int mds_done_writing(struct ptlrpc_request *req, int offset)
2008 struct mds_body *body;
2009 int rc, size = sizeof(struct mds_body);
2012 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
2014 body = lustre_swab_reqbuf(req, offset, sizeof(*body),
2015 lustre_swab_mds_body);
2017 CERROR("Can't unpack body\n");
2018 req->rq_status = -EFAULT;
2022 rc = lustre_pack_reply(req, 1, &size, NULL);
2024 CERROR("lustre_pack_reply: rc = %d\n", rc);
2025 req->rq_status = rc;