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/lustre_mds.h>
44 #include <linux/obd_lov.h>
45 #include <linux/lustre_fsfilt.h>
46 #include <linux/lprocfs_status.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 static struct mds_file_data *mds_handle2mfd(struct lustre_handle *handle)
93 LASSERT(handle != NULL);
94 RETURN(class_handle2object(handle->cookie));
97 static 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);
116 /* Caller must hold mds->mds_epoch_sem */
117 static int mds_alloc_filterdata(struct inode *inode)
119 LASSERT(inode->i_filterdata == NULL);
120 OBD_ALLOC(inode->i_filterdata, sizeof(struct mds_filter_data));
121 if (inode->i_filterdata == NULL)
123 LASSERT(igrab(inode) == inode);
127 /* Caller must hold mds->mds_epoch_sem */
128 static void mds_free_filterdata(struct inode *inode)
130 LASSERT(inode->i_filterdata != NULL);
131 OBD_FREE(inode->i_filterdata, sizeof(struct mds_filter_data));
132 inode->i_filterdata = NULL;
136 /* Write access to a file: executors cause a negative count,
137 * writers a positive count. The semaphore is needed to perform
138 * a check for the sign and then increment or decrement atomically.
140 * This code is closely tied to the allocation of the d_fsdata and the
141 * MDS epoch, so we use the same semaphore for the whole lot.
143 * We could use a different semaphore for each file, if it ever shows
144 * up in a profile, which it won't.
146 * epoch argument is nonzero during recovery */
147 static int mds_get_write_access(struct mds_obd *mds, struct inode *inode,
152 down(&mds->mds_epoch_sem);
154 if (atomic_read(&inode->i_writecount) < 0) {
155 up(&mds->mds_epoch_sem);
160 if (MDS_FILTERDATA(inode) && MDS_FILTERDATA(inode)->io_epoch != 0) {
161 CDEBUG(D_INODE, "continuing MDS epoch "LPU64" for ino %lu/%u\n",
162 MDS_FILTERDATA(inode)->io_epoch, inode->i_ino,
163 inode->i_generation);
167 if (inode->i_filterdata == NULL)
168 mds_alloc_filterdata(inode);
169 if (inode->i_filterdata == NULL) {
173 if (epoch > mds->mds_io_epoch)
174 mds->mds_io_epoch = epoch;
177 MDS_FILTERDATA(inode)->io_epoch = mds->mds_io_epoch;
178 CDEBUG(D_INODE, "starting MDS epoch "LPU64" for ino %lu/%u\n",
179 mds->mds_io_epoch, inode->i_ino, inode->i_generation);
182 atomic_inc(&inode->i_writecount);
183 up(&mds->mds_epoch_sem);
187 /* Returns EAGAIN if the client needs to get size and/or cookies and close
188 * again -- which is never true if the file is about to be unlinked. Otherwise
189 * returns the number of remaining writers. */
190 static int mds_put_write_access(struct mds_obd *mds, struct inode *inode,
191 struct mds_body *body, int unlinking)
196 down(&mds->mds_epoch_sem);
197 atomic_dec(&inode->i_writecount);
198 rc = atomic_read(&inode->i_writecount);
202 if (!unlinking && !(body->valid & OBD_MD_FLSIZE))
203 GOTO(out, rc = EAGAIN);
205 mds_free_filterdata(inode);
207 up(&mds->mds_epoch_sem);
211 static int mds_deny_write_access(struct mds_obd *mds, struct inode *inode)
214 down(&mds->mds_epoch_sem);
215 if (atomic_read(&inode->i_writecount) > 0) {
216 up(&mds->mds_epoch_sem);
219 atomic_dec(&inode->i_writecount);
220 up(&mds->mds_epoch_sem);
224 static void mds_allow_write_access(struct inode *inode)
227 atomic_inc(&inode->i_writecount);
230 int mds_query_write_access(struct inode *inode)
233 RETURN(atomic_read(&inode->i_writecount));
236 /* This replaces the VFS mds_dentry_open, it manages mfd and writecount */
237 static struct mds_file_data *mds_dentry_open(struct dentry *dentry,
238 struct vfsmount *mnt, int flags,
239 struct ptlrpc_request *req)
241 struct mds_export_data *med = &req->rq_export->exp_mds_data;
242 struct mds_obd *mds = mds_req2mds(req);
243 struct mds_file_data *mfd;
244 struct mds_body *body;
250 CERROR("mds: out of memory\n");
251 GOTO(cleanup_dentry, error = -ENOMEM);
254 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
256 if (flags & FMODE_WRITE) {
257 /* FIXME: in recovery, need to pass old epoch here */
258 error = mds_get_write_access(mds, dentry->d_inode, 0);
260 GOTO(cleanup_mfd, error);
261 body->io_epoch = MDS_FILTERDATA(dentry->d_inode)->io_epoch;
262 } else if (flags & FMODE_EXEC) {
263 error = mds_deny_write_access(mds, dentry->d_inode);
265 GOTO(cleanup_mfd, error);
270 /* Mark the file as open to handle open-unlink. */
271 mds_open_orphan_inc(dentry->d_inode);
273 mfd->mfd_mode = flags;
274 mfd->mfd_dentry = dentry;
275 mfd->mfd_xid = req->rq_xid;
277 spin_lock(&med->med_open_lock);
278 list_add(&mfd->mfd_list, &med->med_open_head);
279 spin_unlock(&med->med_open_lock);
282 body->handle.cookie = mfd->mfd_handle.h_cookie;
288 mds_mfd_destroy(mfd);
290 return ERR_PTR(error);
293 static void mds_objids_from_lmm(obd_id *ids, struct lov_mds_md *lmm,
294 struct lov_desc *desc)
297 for (i = 0; i < le32_to_cpu(lmm->lmm_stripe_count); i++) {
298 ids[le32_to_cpu(lmm->lmm_objects[i].l_ost_idx)] =
299 le64_to_cpu(lmm->lmm_objects[i].l_object_id);
303 /* Must be called with i_sem held */
304 static int mds_create_objects(struct ptlrpc_request *req, int offset,
305 struct mds_update_record *rec,
306 struct mds_obd *mds, struct obd_device *obd,
307 struct dentry *dchild, void **handle,
311 struct obd_trans_info oti = { 0 };
312 struct mds_body *body;
313 struct lov_stripe_md *lsm = NULL;
314 struct lov_mds_md *lmm = NULL;
315 struct inode *inode = dchild->d_inode;
317 int rc, lmm_bufsize, lmm_size;
320 if (rec->ur_flags & MDS_OPEN_DELAY_CREATE ||
321 !(rec->ur_flags & FMODE_WRITE))
324 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*body));
326 if (!S_ISREG(inode->i_mode))
328 if (body->valid & OBD_MD_FLEASIZE)
331 OBD_ALLOC(*ids, mds->mds_lov_desc.ld_tgt_count * sizeof(**ids));
334 oti.oti_objid = *ids;
337 *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
338 if (IS_ERR(*handle)) {
339 rc = PTR_ERR(*handle);
345 if(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
346 LASSERT (rec->ur_fid2->id);
347 body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
348 lmm_size = rec->ur_eadatalen;
349 lmm = rec->ur_eadata;
352 mds_objids_from_lmm(*ids, lmm, &mds->mds_lov_desc);
354 lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
355 lmm_bufsize = req->rq_repmsg->buflens[offset];
357 LASSERT(lmm_bufsize >= lmm_size);
358 memcpy(lmm_buf, lmm, lmm_size);
359 rc = fsfilt_set_md(obd, inode, *handle, lmm, lmm_size);
361 CERROR("open replay failed to set md:%d\n", rc);
365 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_ALLOC_OBDO))
366 GOTO(out_ids, rc = -ENOMEM);
370 GOTO(out_ids, rc = -ENOMEM);
371 oa->o_mode = S_IFREG | 0600;
372 oa->o_id = inode->i_ino;
373 oa->o_generation = inode->i_generation;
374 oa->o_uid = 0; /* must have 0 uid / gid on OST */
376 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGENER | OBD_MD_FLTYPE |
377 OBD_MD_FLMODE | OBD_MD_FLUID | OBD_MD_FLGID;
380 obdo_from_inode(oa, inode, OBD_MD_FLTYPE|OBD_MD_FLATIME|OBD_MD_FLMTIME|
383 if (!(rec->ur_flags & MDS_OPEN_HAS_OBJS)) {
384 /* check if things like lfs setstripe are sending us the ea */
385 if (rec->ur_flags & MDS_OPEN_HAS_EA) {
386 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
388 0, &lsm, rec->ur_eadata);
392 OBD_ALLOC(lmm, mds->mds_max_mdsize);
394 GOTO(out_oa, rc = -ENOMEM);
396 lmm_size = mds->mds_max_mdsize;
397 rc = mds_get_md(obd, dchild->d_parent->d_inode,
400 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
403 OBD_FREE(lmm, mds->mds_max_mdsize);
407 rc = obd_create(mds->mds_osc_exp, oa, &lsm, &oti);
412 CDEBUG(level, "error creating objects for "
413 "inode %lu: rc = %d\n",
416 CERROR("obd_create returned invalid "
423 rc = obd_iocontrol(OBD_IOC_LOV_SETEA, mds->mds_osc_exp,
424 0, &lsm, rec->ur_eadata);
428 lsm->lsm_object_id = oa->o_id;
431 oa->o_size = inode->i_size;
432 obdo_from_inode(oa, inode, OBD_MD_FLTYPE|OBD_MD_FLATIME|
433 OBD_MD_FLMTIME| OBD_MD_FLCTIME| OBD_MD_FLSIZE);
434 rc = obd_setattr(mds->mds_osc_exp, oa, lsm, &oti);
436 CERROR("error setting attrs for inode %lu: rc %d\n",
439 CERROR("obd_setattr returned bad rc %d\n", rc);
446 body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
447 obdo_refresh_inode(inode, oa, OBD_MD_FLBLKSZ);
449 LASSERT(lsm && lsm->lsm_object_id);
451 rc = obd_packmd(mds->mds_osc_exp, &lmm, lsm);
452 if (!rec->ur_fid2->id)
453 obd_free_memmd(mds->mds_osc_exp, &lsm);
456 body->eadatasize = rc;
457 rc = fsfilt_set_md(obd, inode, *handle, lmm, lmm_size);
458 lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
459 lmm_bufsize = req->rq_repmsg->buflens[offset];
461 LASSERT(lmm_bufsize >= lmm_size);
463 memcpy(lmm_buf, lmm, lmm_size);
464 obd_free_diskmd(mds->mds_osc_exp, &lmm);
466 oti_free_cookies(&oti);
470 OBD_FREE(*ids, mds->mds_lov_desc.ld_tgt_count * sizeof(**ids));
476 static void reconstruct_open(struct mds_update_record *rec, int offset,
477 struct ptlrpc_request *req,
478 struct lustre_handle *child_lockh)
480 struct mds_export_data *med = &req->rq_export->exp_mds_data;
481 struct mds_client_data *mcd = med->med_mcd;
482 struct mds_obd *mds = mds_req2mds(req);
483 struct mds_file_data *mfd;
484 struct obd_device *obd = req->rq_export->exp_obd;
485 struct dentry *parent, *child;
486 struct ldlm_reply *rep;
487 struct mds_body *body;
493 LASSERT(offset == 2); /* only called via intent */
494 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
495 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
497 /* copy rc, transno and disp; steal locks */
498 mds_req_from_mcd(req, mcd);
499 intent_set_disposition(rep, mcd->mcd_last_data);
501 /* Only replay if create or open actually happened. */
502 if (!intent_disposition(rep, DISP_OPEN_CREATE | DISP_OPEN_OPEN) ) {
504 return; /* error looking up parent or child */
507 parent = mds_fid2dentry(mds, rec->ur_fid1, NULL);
508 LASSERT(!IS_ERR(parent));
510 child = ll_lookup_one_len(rec->ur_name, parent, rec->ur_namelen - 1);
511 LASSERT(!IS_ERR(child));
513 if (!child->d_inode) {
514 GOTO(out_dput, 0); /* child not present to open */
517 /* At this point, we know we have a child. We'll send
518 * it back _unless_ it not created and open failed.
520 if (intent_disposition(rep, DISP_OPEN_OPEN) &&
521 !intent_disposition(rep, DISP_OPEN_CREATE) &&
526 /* get lock (write for O_CREAT, read otherwise) */
528 mds_pack_inode2fid(&body->fid1, child->d_inode);
529 mds_pack_inode2body(body, child->d_inode);
530 if (S_ISREG(child->d_inode->i_mode)) {
531 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
535 LASSERT(rc == req->rq_status);
537 /* If we have LOV EA data, the OST holds size, mtime */
538 if (!(body->valid & OBD_MD_FLEASIZE))
539 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
540 OBD_MD_FLATIME | OBD_MD_FLMTIME);
542 /* XXX need to check this case */
545 /* If we're opening a file without an EA, change to a write
546 lock (unless we already have one). */
548 /* If we have -EEXIST as the status, and we were asked to create
549 * exclusively, we can tell we failed because the file already existed.
551 if (req->rq_status == -EEXIST &&
552 ((rec->ur_flags & (MDS_OPEN_CREAT | MDS_OPEN_EXCL)) ==
553 (MDS_OPEN_CREAT | MDS_OPEN_EXCL))) {
557 /* If we didn't get as far as trying to open, then some locking thing
558 * probably went wrong, and we'll just bail here.
560 if (!intent_disposition(rep, DISP_OPEN_OPEN))
563 /* If we failed, then we must have failed opening, so don't look for
564 * file descriptor or anything, just give the client the bad news.
570 list_for_each(t, &med->med_open_head) {
571 mfd = list_entry(t, struct mds_file_data, mfd_list);
572 if (mfd->mfd_xid == req->rq_xid)
577 /* #warning "XXX fixme" bug 2991 */
578 /* Here it used to LASSERT(mfd) if exp_outstanding_reply != NULL.
579 * Now that exp_outstanding_reply is a list, it's just using mfd != NULL
580 * to detect a re-open */
582 mntget(mds->mds_vfsmnt);
583 CERROR("Re-opened file \n");
584 mfd = mds_dentry_open(child, mds->mds_vfsmnt,
585 rec->ur_flags & ~MDS_OPEN_TRUNC, req);
587 CERROR("mds: out of memory\n");
588 GOTO(out_dput, req->rq_status = -ENOMEM);
600 /* do NOT or the MAY_*'s, you'll get the weakest */
601 static int accmode(int flags)
605 if (flags & FMODE_READ)
607 if (flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
609 if (flags & FMODE_EXEC)
614 /* Handles object creation, actual opening, and I/O epoch */
615 static int mds_finish_open(struct ptlrpc_request *req, struct dentry *dchild,
616 struct mds_body *body, int flags, void **handle,
617 struct mds_update_record *rec,struct ldlm_reply *rep)
619 struct mds_obd *mds = mds_req2mds(req);
620 struct obd_device *obd = req->rq_export->exp_obd;
621 struct mds_file_data *mfd = NULL;
622 obd_id *ids = NULL; /* object IDs created */
626 /* atomically create objects if necessary */
627 down(&dchild->d_inode->i_sem);
628 if (S_ISREG(dchild->d_inode->i_mode) &&
629 !(body->valid & OBD_MD_FLEASIZE)) {
630 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
633 up(&dchild->d_inode->i_sem);
638 /* no EA: create objects */
639 rc = mds_create_objects(req, 2, rec, mds, obd,
640 dchild, handle, &ids);
642 CERROR("mds_create_objects: rc = %d\n", rc);
643 up(&dchild->d_inode->i_sem);
647 /* If the inode has EA data, then OSTs hold size, mtime */
648 if (S_ISREG(dchild->d_inode->i_mode) &&
649 !(body->valid & OBD_MD_FLEASIZE)) {
650 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
651 OBD_MD_FLATIME | OBD_MD_FLMTIME);
653 up(&dchild->d_inode->i_sem);
655 intent_set_disposition(rep, DISP_OPEN_OPEN);
656 mfd = mds_dentry_open(dchild, mds->mds_vfsmnt, flags, req);
658 RETURN(PTR_ERR(mfd));
660 CDEBUG(D_INODE, "mfd %p, cookie "LPX64"\n", mfd,
661 mfd->mfd_handle.h_cookie);
663 mds_lov_update_objids(obd, ids);
664 OBD_FREE(ids, sizeof(*ids) * mds->mds_lov_desc.ld_tgt_count);
667 // mds_mfd_destroy(mfd);
671 static int mds_open_by_fid(struct ptlrpc_request *req, struct ll_fid *fid,
672 struct mds_body *body, int flags,
673 struct mds_update_record *rec,struct ldlm_reply *rep)
675 struct mds_obd *mds = mds_req2mds(req);
676 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
677 struct dentry *dchild;
678 char fidname[LL_FID_NAMELEN];
683 down(&pending_dir->i_sem);
684 fidlen = ll_fid2str(fidname, fid->id, fid->generation);
685 dchild = lookup_one_len(fidname, mds->mds_pending_dir, fidlen);
686 if (IS_ERR(dchild)) {
687 up(&pending_dir->i_sem);
688 rc = PTR_ERR(dchild);
689 CERROR("error looking up %s in PENDING: rc = %d\n",fidname, rc);
693 if (dchild->d_inode != NULL) {
694 up(&pending_dir->i_sem);
695 mds_inode_set_orphan(dchild->d_inode);
696 mds_pack_inode2fid(&body->fid1, dchild->d_inode);
697 mds_pack_inode2body(body, dchild->d_inode);
698 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
699 intent_set_disposition(rep, DISP_LOOKUP_POS);
700 CWARN("Orphan %s found and opened in PENDING directory\n",
705 up(&pending_dir->i_sem);
707 /* We didn't find it in PENDING so it isn't an orphan. See
708 * if it was a regular inode that was previously created. */
709 dchild = mds_fid2dentry(mds, fid, NULL);
711 RETURN(PTR_ERR(dchild));
713 mds_pack_inode2fid(&body->fid1, dchild->d_inode);
714 mds_pack_inode2body(body, dchild->d_inode);
715 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
716 intent_set_disposition(rep, DISP_LOOKUP_POS);
719 rc = mds_finish_open(req, dchild, body, flags, &handle, rec, rep);
720 rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
721 req, rc, rep ? rep->lock_policy_res1 : 0);
722 /* XXX what do we do here if mds_finish_transno itself failed? */
728 int mds_pin(struct ptlrpc_request *req)
730 struct obd_device *obd = req->rq_export->exp_obd;
731 struct mds_body *request_body, *reply_body;
732 struct obd_run_ctxt saved;
733 int rc, size = sizeof(*reply_body);
736 request_body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*request_body));
738 rc = lustre_pack_reply(req, 1, &size, NULL);
741 reply_body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply_body));
743 push_ctxt(&saved, &obd->obd_ctxt, NULL);
744 rc = mds_open_by_fid(req, &request_body->fid1, reply_body,
745 request_body->flags, NULL, NULL);
746 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
751 /* Get a lock on the ino to sync with creation WRT inode reuse (bug 2029).
752 * If child_lockh is NULL we just get the lock as a barrier to wait for
753 * other holders of this lock, and drop it right away again. */
754 int mds_lock_new_child(struct obd_device *obd, struct inode *inode,
755 struct lustre_handle *child_lockh)
757 struct ldlm_res_id child_res_id = { .name = { inode->i_ino, 0, 1, 0 } };
758 struct lustre_handle lockh;
762 if (child_lockh == NULL)
763 child_lockh = &lockh;
765 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, child_res_id,
766 LDLM_PLAIN, NULL, LCK_EX, &lock_flags,
767 mds_blocking_ast, ldlm_completion_ast, NULL, NULL,
768 NULL, 0, NULL, child_lockh);
770 CERROR("ldlm_cli_enqueue: %d\n", rc);
771 else if (child_lockh == &lockh)
772 ldlm_lock_decref(child_lockh, LCK_EX);
777 int mds_open(struct mds_update_record *rec, int offset,
778 struct ptlrpc_request *req, struct lustre_handle *child_lockh)
780 /* XXX ALLOCATE _something_ - 464 bytes on stack here */
781 struct obd_device *obd = req->rq_export->exp_obd;
782 struct mds_obd *mds = mds_req2mds(req);
783 struct ldlm_reply *rep = NULL;
784 struct mds_body *body = NULL;
785 struct dentry *dchild = NULL, *dparent = NULL;
786 struct mds_export_data *med;
787 struct lustre_handle parent_lockh;
788 int rc = 0, cleanup_phase = 0, acc_mode, created = 0;
789 int parent_mode = LCK_PR;
791 struct dentry_params dp;
794 if (offset == 2) { /* intent */
795 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
796 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
797 } else if (offset == 0) { /* non-intent reint */
798 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
804 MDS_CHECK_RESENT(req, reconstruct_open(rec, offset, req, child_lockh));
806 /* Step 0: If we are passed a fid, then we assume the client already
807 * opened this file and is only replaying the RPC, so we open the
808 * inode by fid (at some large expense in security). */
809 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
810 DEBUG_REQ(D_HA, req, "open replay, disp: "LPX64"\n",
811 rep->lock_policy_res1);
813 LASSERT(rec->ur_fid2->id);
815 rc = mds_open_by_fid(req, rec->ur_fid2, body, rec->ur_flags,
819 /* We didn't find the correct inode on disk either, so we
820 * need to re-create it via a regular replay. */
821 LASSERT(rec->ur_flags & MDS_OPEN_CREAT);
823 LASSERT(!rec->ur_fid2->id);
826 LASSERT(offset == 2); /* If we got here, we must be called via intent */
828 med = &req->rq_export->exp_mds_data;
829 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) {
830 CERROR("test case OBD_FAIL_MDS_OPEN_PACK\n");
834 acc_mode = accmode(rec->ur_flags);
836 /* Step 1: Find and lock the parent */
837 if (rec->ur_flags & O_CREAT)
838 parent_mode = LCK_PW;
839 dparent = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, parent_mode,
840 &parent_lockh, rec->ur_name,
841 rec->ur_namelen - 1);
842 if (IS_ERR(dparent)) {
843 rc = PTR_ERR(dparent);
844 CERROR("parent lookup error %d\n", rc);
847 LASSERT(dparent->d_inode != NULL);
849 cleanup_phase = 1; /* parent dentry and lock */
851 /* Step 2: Lookup the child */
852 dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1);
853 if (IS_ERR(dchild)) {
854 rc = PTR_ERR(dchild);
855 dchild = NULL; /* don't confuse mds_finish_transno() below */
859 cleanup_phase = 2; /* child dentry */
861 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
863 intent_set_disposition(rep, DISP_LOOKUP_POS);
865 intent_set_disposition(rep, DISP_LOOKUP_NEG);
867 /*Step 3: If the child was negative, and we're supposed to, create it.*/
868 if (dchild->d_inode == NULL) {
869 unsigned long ino = rec->ur_fid2->id;
873 if (!(rec->ur_flags & MDS_OPEN_CREAT)) {
874 /* It's negative and we weren't supposed to create it */
875 GOTO(cleanup, rc = -ENOENT);
878 intent_set_disposition(rep, DISP_OPEN_CREATE);
879 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_CREATE,
881 if (IS_ERR(handle)) {
882 rc = PTR_ERR(handle);
886 dchild->d_fsdata = (void *) &dp;
890 rc = ll_vfs_create(dparent->d_inode, dchild, rec->ur_mode,NULL);
891 if (dchild->d_fsdata == (void *)(unsigned long)ino)
892 dchild->d_fsdata = NULL;
895 CDEBUG(D_INODE, "error during create: %d\n", rc);
898 inode = dchild->d_inode;
900 LASSERT(ino == inode->i_ino);
901 /* Written as part of setattr */
902 inode->i_generation = rec->ur_fid2->generation;
903 CDEBUG(D_HA, "recreated ino %lu with gen %u\n",
904 inode->i_ino, inode->i_generation);
908 LTIME_S(iattr.ia_atime) = rec->ur_time;
909 LTIME_S(iattr.ia_ctime) = rec->ur_time;
910 LTIME_S(iattr.ia_mtime) = rec->ur_time;
912 iattr.ia_uid = rec->ur_fsuid;
913 if (dparent->d_inode->i_mode & S_ISGID)
914 iattr.ia_gid = dparent->d_inode->i_gid;
916 iattr.ia_gid = rec->ur_fsgid;
918 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
919 ATTR_MTIME | ATTR_CTIME;
921 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
923 CERROR("error on child setattr: rc = %d\n", rc);
925 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
927 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
929 CERROR("error on parent setattr: rc = %d\n", rc);
931 acc_mode = 0; /* Don't check for permissions */
934 LASSERT(!mds_inode_is_orphan(dchild->d_inode));
936 mds_pack_inode2fid(&body->fid1, dchild->d_inode);
937 mds_pack_inode2body(body, dchild->d_inode);
939 if (S_ISREG(dchild->d_inode->i_mode)) {
940 /* Check permissions etc */
941 rc = ll_permission(dchild->d_inode, acc_mode, NULL);
945 /* Can't write to a read-only file */
946 if (IS_RDONLY(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0)
947 GOTO(cleanup, rc = -EPERM);
949 /* An append-only file must be opened in append mode for
951 if (IS_APPEND(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0 &&
952 ((rec->ur_flags & MDS_OPEN_APPEND) == 0 ||
953 (rec->ur_flags & MDS_OPEN_TRUNC) != 0))
954 GOTO(cleanup, rc = -EPERM);
957 if (!created && (rec->ur_flags & MDS_OPEN_CREAT) &&
958 (rec->ur_flags & MDS_OPEN_EXCL)) {
959 /* File already exists, we didn't just create it, and we
960 * were passed O_EXCL; err-or. */
961 GOTO(cleanup, rc = -EEXIST); // returns a lock to the client
964 /* if we are following a symlink, don't open */
965 if (S_ISLNK(dchild->d_inode->i_mode))
966 GOTO(cleanup, rc = 0);
968 if ((rec->ur_flags & MDS_OPEN_DIRECTORY) &&
969 !S_ISDIR(dchild->d_inode->i_mode))
970 GOTO(cleanup, rc = -ENOTDIR);
972 if (S_ISDIR(dchild->d_inode->i_mode)) {
973 if (rec->ur_flags & MDS_OPEN_CREAT ||
974 rec->ur_flags & FMODE_WRITE) {
975 /*we are tryying to create or write a exist dir*/
976 GOTO(cleanup, rc = -EISDIR);
978 if (ll_permission(dchild->d_inode, acc_mode, NULL)) {
979 GOTO(cleanup, rc = -EACCES);
983 /* Step 5: mds_open it */
984 rc = mds_finish_open(req, dchild, body, rec->ur_flags, &handle, rec,
989 rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
990 req, rc, rep ? rep->lock_policy_res1 : 0);
992 switch (cleanup_phase) {
995 int err = vfs_unlink(dparent->d_inode, dchild);
997 CERROR("unlink(%*s) in error path: %d\n",
998 dchild->d_name.len, dchild->d_name.name,
1001 } else if (created) {
1002 mds_lock_new_child(obd, dchild->d_inode, NULL);
1006 if (dparent == NULL)
1011 ldlm_lock_decref(&parent_lockh, parent_mode);
1013 ptlrpc_save_lock (req, &parent_lockh, parent_mode);
1016 atomic_inc(&mds->mds_open_count);
1020 /* Close a "file descriptor" and possibly unlink an orphan from the
1021 * PENDING directory.
1023 * If we are being called from mds_disconnect() because the client has
1024 * disappeared, then req == NULL and we do not update last_rcvd because
1025 * there is nothing that could be recovered by the client at this stage
1026 * (it will not even _have_ an entry in last_rcvd anymore).
1028 * Returns EAGAIN if the client needs to get more data and re-close. */
1029 int mds_mfd_close(struct ptlrpc_request *req, struct obd_device *obd,
1030 struct mds_file_data *mfd, int unlink_orphan)
1032 struct inode *inode = mfd->mfd_dentry->d_inode;
1033 char fidname[LL_FID_NAMELEN];
1034 int last_orphan, fidlen, rc = 0, cleanup_phase = 0;
1035 struct dentry *pending_child = NULL;
1036 struct mds_obd *mds = &obd->u.mds;
1037 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1038 void *handle = NULL;
1039 struct mds_body *request_body = NULL, *reply_body = NULL;
1040 struct dentry_params dp;
1044 request_body = lustre_msg_buf(req->rq_reqmsg, 0,
1045 sizeof(*request_body));
1046 reply_body = lustre_msg_buf(req->rq_repmsg, 0,
1047 sizeof(*reply_body));
1050 fidlen = ll_fid2str(fidname, inode->i_ino, inode->i_generation);
1052 last_orphan = mds_open_orphan_dec_test(inode) &&
1053 mds_inode_is_orphan(inode);
1055 /* this is half of the actual "close" */
1056 if (mfd->mfd_mode & FMODE_WRITE) {
1057 rc = mds_put_write_access(mds, inode, request_body,
1058 last_orphan && unlink_orphan);
1059 } else if (mfd->mfd_mode & FMODE_EXEC) {
1060 mds_allow_write_access(inode);
1063 if (last_orphan && unlink_orphan) {
1064 struct lov_mds_md *lmm = NULL;
1065 int stripe_count = 0;
1066 LASSERT(rc == 0); /* mds_put_write_access must have succeeded */
1068 CDEBUG(D_HA, "destroying orphan object %s\n", fidname);
1070 /* Sadly, there is no easy way to save pending_child from
1071 * mds_reint_unlink() into mfd, so we need to re-lookup,
1072 * but normally it will still be in the dcache. */
1073 pending_dir = mds->mds_pending_dir->d_inode;
1074 down(&pending_dir->i_sem);
1075 cleanup_phase = 1; /* up(i_sem) when finished */
1076 pending_child = lookup_one_len(fidname, mds->mds_pending_dir,
1078 if (IS_ERR(pending_child))
1079 GOTO(cleanup, rc = PTR_ERR(pending_child));
1080 LASSERT(pending_child->d_inode != NULL);
1082 cleanup_phase = 2; /* dput(pending_child) when finished */
1084 lmm = lustre_msg_buf(req->rq_repmsg, 1, 0);
1085 stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
1088 handle = fsfilt_start_log(obd, pending_dir, FSFILT_OP_UNLINK,
1089 NULL, stripe_count);
1090 if (IS_ERR(handle)) {
1091 rc = PTR_ERR(handle);
1096 if (req != NULL && (reply_body->valid & OBD_MD_FLEASIZE) &&
1097 mds_log_op_unlink(obd, pending_child->d_inode, lmm,
1098 req->rq_repmsg->buflens[1],
1099 lustre_msg_buf(req->rq_repmsg, 2, 0),
1100 req->rq_repmsg->buflens[2]) > 0) {
1101 reply_body->valid |= OBD_MD_FLCOOKIE;
1104 pending_child->d_fsdata = (void *) &dp;
1107 if (S_ISDIR(pending_child->d_inode->i_mode))
1108 rc = vfs_rmdir(pending_dir, pending_child);
1110 rc = vfs_unlink(pending_dir, pending_child);
1112 CERROR("error unlinking orphan %s: rc %d\n",fidname,rc);
1113 } else if (mfd->mfd_mode & FMODE_WRITE && rc == 0) {
1114 /* Update the on-disk attributes if this was the last write
1115 * close, and all information was provided (i.e., rc == 0)
1117 * XXX this should probably be abstracted with mds_reint_setattr
1122 /* XXX can't set block count with fsfilt_setattr (!) */
1123 iattr.ia_valid = ATTR_CTIME | ATTR_ATIME |
1124 ATTR_MTIME | ATTR_SIZE;
1125 iattr.ia_atime = request_body->atime;
1126 iattr.ia_ctime = request_body->ctime;
1127 iattr.ia_mtime = request_body->mtime;
1128 iattr.ia_size = request_body->size;
1129 /* iattr.ia_blocks = request_body->blocks */
1131 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
1133 GOTO(cleanup, rc = PTR_ERR(handle));
1134 rc = fsfilt_setattr(obd, mfd->mfd_dentry, handle, &iattr, 0);
1136 CERROR("error in setattr(%s): rc %d\n", fidname, rc);
1139 /* If other clients have this file open for write, rc will be > 0 */
1142 l_dput(mfd->mfd_dentry);
1143 mds_mfd_destroy(mfd);
1146 atomic_dec(&mds->mds_open_count);
1148 rc = mds_finish_transno(mds, pending_dir, handle, req, rc, 0);
1149 } else if (handle) {
1150 int err = fsfilt_commit(obd, pending_dir, handle, 0);
1152 CERROR("error committing close: %d\n", err);
1158 switch (cleanup_phase) {
1160 dput(pending_child);
1162 up(&pending_dir->i_sem);
1167 int mds_close(struct ptlrpc_request *req)
1169 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1170 struct obd_device *obd = req->rq_export->exp_obd;
1171 struct mds_body *body;
1172 struct mds_file_data *mfd;
1173 struct obd_run_ctxt saved;
1174 struct inode *inode;
1175 int rc, repsize[3] = {sizeof(struct mds_body),
1176 obd->u.mds.mds_max_mdsize,
1177 obd->u.mds.mds_max_cookiesize};
1180 rc = lustre_pack_reply(req, 3, repsize, NULL);
1182 CERROR("lustre_pack_reply: rc = %d\n", rc);
1183 req->rq_status = rc;
1185 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1188 body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
1190 CERROR("Can't unpack body\n");
1191 req->rq_status = -EFAULT;
1195 if (body->flags & MDS_BFLAG_UNCOMMITTED_WRITES)
1196 /* do some stuff */ ;
1198 mfd = mds_handle2mfd(&body->handle);
1200 DEBUG_REQ(D_ERROR, req, "no handle for file close ino "LPD64
1201 ": cookie "LPX64, body->fid1.id, body->handle.cookie);
1202 req->rq_status = -ESTALE;
1206 inode = mfd->mfd_dentry->d_inode;
1207 if (mds_inode_is_orphan(inode) && mds_open_orphan_count(inode) == 1) {
1208 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
1209 LASSERT(body != NULL);
1211 mds_pack_inode2fid(&body->fid1, inode);
1212 mds_pack_inode2body(body, inode);
1213 mds_pack_md(obd, req->rq_repmsg, 1, body, inode, 1);
1215 spin_lock(&med->med_open_lock);
1216 list_del(&mfd->mfd_list);
1217 spin_unlock(&med->med_open_lock);
1219 push_ctxt(&saved, &obd->obd_ctxt, NULL);
1220 req->rq_status = mds_mfd_close(rc ? NULL : req, obd, mfd, 1);
1221 pop_ctxt(&saved, &obd->obd_ctxt, NULL);
1223 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) {
1224 CERROR("test case OBD_FAIL_MDS_CLOSE_PACK\n");
1225 req->rq_status = -ENOMEM;
1234 int mds_done_writing(struct ptlrpc_request *req)
1236 struct mds_body *body;
1237 int rc, size = sizeof(struct mds_body);
1240 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1242 body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
1244 CERROR("Can't unpack body\n");
1245 req->rq_status = -EFAULT;
1249 rc = lustre_pack_reply(req, 1, &size, NULL);
1251 CERROR("lustre_pack_reply: rc = %d\n", rc);
1252 req->rq_status = rc;