1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * linux/mds/mds_reint.c
5 * Lustre Metadata Server (mds) reintegration routines
7 * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
8 * Author: Peter Braam <braam@clusterfs.com>
9 * Author: Andreas Dilger <adilger@clusterfs.com>
10 * Author: Phil Schwan <phil@clusterfs.com>
12 * This file is part of Lustre, http://www.lustre.org.
14 * Lustre is free software; you can redistribute it and/or
15 * modify it under the terms of version 2 of the GNU General Public
16 * License as published by the Free Software Foundation.
18 * Lustre is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with Lustre; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 # define EXPORT_SYMTAB
31 #define DEBUG_SUBSYSTEM S_MDS
34 #include <linux/obd_support.h>
35 #include <linux/obd_class.h>
36 #include <linux/obd.h>
37 #include <linux/lustre_lib.h>
38 #include <linux/lustre_idl.h>
39 #include <linux/lustre_mds.h>
40 #include <linux/lustre_dlm.h>
41 #include <linux/lustre_fsfilt.h>
43 #include "mds_internal.h"
45 void mds_commit_cb(struct obd_device *obd, __u64 transno, void *data,
48 obd_transno_commit_cb(obd, transno, error);
51 struct mds_logcancel_data {
52 struct lov_mds_md *mlcd_lmm;
56 struct llog_cookie mlcd_cookies[0];
60 static void mds_cancel_cookies_cb(struct obd_device *obd, __u64 transno,
61 void *cb_data, int error)
63 struct mds_logcancel_data *mlcd = cb_data;
64 struct lov_stripe_md *lsm = NULL;
65 struct llog_ctxt *ctxt;
68 obd_transno_commit_cb(obd, transno, error);
70 CDEBUG(D_HA, "cancelling %d cookies\n",
71 (int)(mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies)));
73 rc = obd_unpackmd(obd->u.mds.mds_osc_exp, &lsm, mlcd->mlcd_lmm,
74 mlcd->mlcd_eadatalen);
76 CERROR("bad LSM cancelling %d log cookies: rc %d\n",
77 (int)(mlcd->mlcd_cookielen/sizeof(*mlcd->mlcd_cookies)),
80 ///* XXX 0 normally, SENDNOW for debug */);
81 ctxt = llog_get_context(obd, mlcd->mlcd_cookies[0].lgc_subsys + 1);
82 rc = llog_cancel(ctxt, lsm,
83 mlcd->mlcd_cookielen /
84 sizeof(*mlcd->mlcd_cookies),
85 mlcd->mlcd_cookies, OBD_LLOG_FL_SENDNOW);
87 CERROR("error cancelling %d log cookies: rc %d\n",
88 (int)(mlcd->mlcd_cookielen /
89 sizeof(*mlcd->mlcd_cookies)), rc);
92 OBD_FREE(mlcd, mlcd->mlcd_size);
95 /* Assumes caller has already pushed us into the kernel context. */
96 int mds_finish_transno(struct mds_obd *mds, struct inode *inode, void *handle,
97 struct ptlrpc_request *req, int rc, __u32 op_data)
99 struct mds_export_data *med = &req->rq_export->exp_mds_data;
100 struct mds_client_data *mcd = med->med_mcd;
101 struct obd_device *obd = req->rq_export->exp_obd;
108 /* if the export has already been failed, we have no last_rcvd slot */
109 if (req->rq_export->exp_failed) {
110 CERROR("committing transaction for disconnected client\n");
119 if (handle == NULL) {
120 /* if we're starting our own xaction, use our own inode */
121 inode = mds->mds_rcvd_filp->f_dentry->d_inode;
122 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
123 if (IS_ERR(handle)) {
124 CERROR("fsfilt_start: %ld\n", PTR_ERR(handle));
125 RETURN(PTR_ERR(handle));
131 transno = req->rq_reqmsg->transno;
133 spin_lock(&mds->mds_transno_lock);
134 transno = ++mds->mds_last_transno;
135 spin_unlock(&mds->mds_transno_lock);
137 spin_lock(&mds->mds_transno_lock);
138 if (transno > mds->mds_last_transno)
139 mds->mds_last_transno = transno;
140 spin_unlock(&mds->mds_transno_lock);
142 req->rq_repmsg->transno = req->rq_transno = transno;
143 mcd->mcd_last_transno = cpu_to_le64(transno);
144 mcd->mcd_last_xid = cpu_to_le64(req->rq_xid);
145 mcd->mcd_last_result = cpu_to_le32(rc);
146 mcd->mcd_last_data = cpu_to_le32(op_data);
148 fsfilt_add_journal_cb(req->rq_export->exp_obd, transno, handle,
149 mds_commit_cb, NULL);
150 err = fsfilt_write_record(obd, mds->mds_rcvd_filp, mcd, sizeof(*mcd),
159 DEBUG_REQ(log_pri, req,
160 "wrote trans #"LPU64" client %s at idx %u: err = %d",
161 transno, mcd->mcd_uuid, med->med_idx, err);
163 err = mds_lov_write_objids(obd);
169 CDEBUG(log_pri, "wrote objids: err = %d\n", err);
172 err = fsfilt_commit(obd, inode, handle, 0);
174 CERROR("error committing transaction: %d\n", err);
182 /* this gives the same functionality as the code between
183 * sys_chmod and inode_setattr
184 * chown_common and inode_setattr
185 * utimes and inode_setattr
187 int mds_fix_attr(struct inode *inode, struct mds_update_record *rec)
189 time_t now = LTIME_S(CURRENT_TIME);
190 struct iattr *attr = &rec->ur_iattr;
191 unsigned int ia_valid = attr->ia_valid;
195 /* only fix up attrs if the client VFS didn't already */
196 if (!(ia_valid & ATTR_RAW))
199 if (!(ia_valid & ATTR_CTIME_SET))
200 LTIME_S(attr->ia_ctime) = now;
201 if (!(ia_valid & ATTR_ATIME_SET))
202 LTIME_S(attr->ia_atime) = now;
203 if (!(ia_valid & ATTR_MTIME_SET))
204 LTIME_S(attr->ia_mtime) = now;
206 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
210 if ((ia_valid & (ATTR_MTIME|ATTR_ATIME)) == (ATTR_MTIME|ATTR_ATIME)) {
211 if (rec->ur_fsuid != inode->i_uid &&
212 (error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
216 if (ia_valid & ATTR_SIZE) {
217 if ((error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
221 if (ia_valid & ATTR_UID) {
224 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
226 if (attr->ia_uid == (uid_t) -1)
227 attr->ia_uid = inode->i_uid;
228 if (attr->ia_gid == (gid_t) -1)
229 attr->ia_gid = inode->i_gid;
230 attr->ia_mode = inode->i_mode;
232 * If the user or group of a non-directory has been
233 * changed by a non-root user, remove the setuid bit.
234 * 19981026 David C Niemi <niemi@tux.org>
236 * Changed this to apply to all users, including root,
237 * to avoid some races. This is the behavior we had in
238 * 2.0. The check for non-root was definitely wrong
239 * for 2.2 anyway, as it should have been using
240 * CAP_FSETID rather than fsuid -- 19990830 SD.
242 if ((inode->i_mode & S_ISUID) == S_ISUID &&
243 !S_ISDIR(inode->i_mode)) {
244 attr->ia_mode &= ~S_ISUID;
245 attr->ia_valid |= ATTR_MODE;
248 * Likewise, if the user or group of a non-directory
249 * has been changed by a non-root user, remove the
250 * setgid bit UNLESS there is no group execute bit
251 * (this would be a file marked for mandatory
252 * locking). 19981026 David C Niemi <niemi@tux.org>
254 * Removed the fsuid check (see the comment above) --
257 if (((inode->i_mode & (S_ISGID | S_IXGRP)) ==
258 (S_ISGID | S_IXGRP)) && !S_ISDIR(inode->i_mode)) {
259 attr->ia_mode &= ~S_ISGID;
260 attr->ia_valid |= ATTR_MODE;
262 } else if (ia_valid & ATTR_MODE) {
263 int mode = attr->ia_mode;
265 if (attr->ia_mode == (mode_t) -1)
266 attr->ia_mode = inode->i_mode;
268 (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
273 void mds_steal_ack_locks(struct obd_export *exp, struct ptlrpc_request *req)
276 struct ptlrpc_request *oldrep = exp->exp_outstanding_reply;
280 memcpy(req->rq_ack_locks, oldrep->rq_ack_locks,
281 sizeof req->rq_ack_locks);
282 spin_lock_irqsave(&req->rq_lock, flags);
283 oldrep->rq_resent = 1;
284 wake_up(&oldrep->rq_reply_waitq);
285 spin_unlock_irqrestore(&req->rq_lock, flags);
286 DEBUG_REQ(D_HA, oldrep, "stole locks from");
287 DEBUG_REQ(D_HA, req, "stole locks for");
290 void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd)
292 DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
293 mcd->mcd_last_transno, mcd->mcd_last_result);
294 req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_transno;
295 req->rq_repmsg->status = req->rq_status = mcd->mcd_last_result;
297 if (req->rq_export->exp_outstanding_reply)
298 mds_steal_ack_locks(req->rq_export, req);
301 static void reconstruct_reint_setattr(struct mds_update_record *rec,
302 int offset, struct ptlrpc_request *req)
304 struct mds_export_data *med = &req->rq_export->exp_mds_data;
305 struct mds_obd *obd = &req->rq_export->exp_obd->u.mds;
307 struct mds_body *body;
309 mds_req_from_mcd(req, med->med_mcd);
311 de = mds_fid2dentry(obd, rec->ur_fid1, NULL);
313 LASSERT(PTR_ERR(de) == req->rq_status);
317 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
318 mds_pack_inode2fid(&body->fid1, de->d_inode);
319 mds_pack_inode2body(body, de->d_inode);
321 /* Don't return OST-specific attributes if we didn't just set them */
322 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
323 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
324 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
325 body->valid |= OBD_MD_FLMTIME;
326 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
327 body->valid |= OBD_MD_FLATIME;
332 /* In the raw-setattr case, we lock the child inode.
333 * In the write-back case or if being called from open, the client holds a lock
336 * We use the ATTR_FROM_OPEN flag to tell these cases apart. */
337 static int mds_reint_setattr(struct mds_update_record *rec, int offset,
338 struct ptlrpc_request *req,
339 struct lustre_handle *lh)
341 struct mds_obd *mds = mds_req2mds(req);
342 struct obd_device *obd = req->rq_export->exp_obd;
343 struct mds_body *body;
345 struct inode *inode = NULL;
346 struct lustre_handle lockh;
348 struct mds_logcancel_data *mlcd = NULL;
349 int rc = 0, cleanup_phase = 0, err, locked = 0;
352 LASSERT(offset == 0);
354 DEBUG_REQ(D_INODE, req, "setattr "LPU64"/%u %x", rec->ur_fid1->id,
355 rec->ur_fid1->generation, rec->ur_iattr.ia_valid);
357 MDS_CHECK_RESENT(req, reconstruct_reint_setattr(rec, offset, req));
359 if (rec->ur_iattr.ia_valid & ATTR_FROM_OPEN) {
360 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
362 GOTO(cleanup, rc = PTR_ERR(de));
364 de = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, LCK_PW,
367 GOTO(cleanup, rc = PTR_ERR(de));
374 if (S_ISREG(inode->i_mode) && rec->ur_eadata != NULL)
377 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb);
379 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
381 GOTO(cleanup, rc = PTR_ERR(handle));
383 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
384 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n",
385 LTIME_S(rec->ur_iattr.ia_mtime),
386 LTIME_S(rec->ur_iattr.ia_ctime));
387 rc = mds_fix_attr(inode, rec);
391 if (rec->ur_iattr.ia_valid & ATTR_ATTR_FLAG) /* ioctl */
392 rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_SETFLAGS,
393 (long)&rec->ur_iattr.ia_attr_flags);
395 rc = fsfilt_setattr(obd, de, handle, &rec->ur_iattr, 0);
397 if (rc == 0 && S_ISREG(inode->i_mode) && rec->ur_eadata != NULL) {
398 rc = fsfilt_set_md(obd, inode, handle,
399 rec->ur_eadata, rec->ur_eadatalen);
402 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
403 mds_pack_inode2fid(&body->fid1, inode);
404 mds_pack_inode2body(body, inode);
406 /* Don't return OST-specific attributes if we didn't just set them */
407 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
408 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
409 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
410 body->valid |= OBD_MD_FLMTIME;
411 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
412 body->valid |= OBD_MD_FLATIME;
414 if (rc == 0 && rec->ur_cookielen && !IS_ERR(mds->mds_osc_obd)) {
415 OBD_ALLOC(mlcd, sizeof(*mlcd) + rec->ur_cookielen +
418 mlcd->mlcd_size = sizeof(*mlcd) + rec->ur_cookielen +
420 mlcd->mlcd_eadatalen = rec->ur_eadatalen;
421 mlcd->mlcd_cookielen = rec->ur_cookielen;
422 mlcd->mlcd_lmm = (void *)&mlcd->mlcd_cookies +
423 mlcd->mlcd_cookielen;
424 memcpy(&mlcd->mlcd_cookies, rec->ur_logcookies,
425 mlcd->mlcd_cookielen);
426 memcpy(mlcd->mlcd_lmm, rec->ur_eadata,
427 mlcd->mlcd_eadatalen);
429 CERROR("unable to allocate log cancel data\n");
435 fsfilt_add_journal_cb(req->rq_export->exp_obd, 0, handle,
436 mds_cancel_cookies_cb, mlcd);
437 err = mds_finish_transno(mds, inode, handle, req, rc, 0);
438 switch (cleanup_phase) {
440 if (S_ISREG(inode->i_mode) && rec->ur_eadata != NULL)
445 ldlm_lock_decref(&lockh, LCK_PW);
447 ldlm_put_lock_into_req(req, &lockh, LCK_PW);
462 static void reconstruct_reint_create(struct mds_update_record *rec, int offset,
463 struct ptlrpc_request *req)
465 struct mds_export_data *med = &req->rq_export->exp_mds_data;
466 struct mds_obd *obd = &req->rq_export->exp_obd->u.mds;
467 struct dentry *parent, *child;
468 struct mds_body *body;
470 mds_req_from_mcd(req, med->med_mcd);
475 parent = mds_fid2dentry(obd, rec->ur_fid1, NULL);
476 LASSERT(!IS_ERR(parent));
477 child = ll_lookup_one_len(rec->ur_name, parent, rec->ur_namelen - 1);
478 LASSERT(!IS_ERR(child));
479 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
480 mds_pack_inode2fid(&body->fid1, child->d_inode);
481 mds_pack_inode2body(body, child->d_inode);
486 static int mds_reint_create(struct mds_update_record *rec, int offset,
487 struct ptlrpc_request *req,
488 struct lustre_handle *lh)
490 struct dentry *dparent = NULL;
491 struct mds_obd *mds = mds_req2mds(req);
492 struct obd_device *obd = req->rq_export->exp_obd;
493 struct dentry *dchild = NULL;
494 struct inode *dir = NULL;
496 struct lustre_handle lockh;
497 int rc = 0, err, type = rec->ur_mode & S_IFMT, cleanup_phase = 0;
499 struct dentry_params dp;
502 LASSERT(offset == 0);
503 LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name, "mds"));
505 DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u name %s mode %o",
506 rec->ur_fid1->id, rec->ur_fid1->generation,
507 rec->ur_name, rec->ur_mode);
509 MDS_CHECK_RESENT(req, reconstruct_reint_create(rec, offset, req));
511 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
512 GOTO(cleanup, rc = -ESTALE);
514 dparent = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, LCK_PW, &lockh,
515 rec->ur_name, rec->ur_namelen - 1);
516 if (IS_ERR(dparent)) {
517 rc = PTR_ERR(dparent);
518 CERROR("parent lookup error %d\n", rc);
521 cleanup_phase = 1; /* locked parent dentry */
522 dir = dparent->d_inode;
525 ldlm_lock_dump_handle(D_OTHER, &lockh);
527 dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1);
528 if (IS_ERR(dchild)) {
529 rc = PTR_ERR(dchild);
530 CERROR("child lookup error %d\n", rc);
534 cleanup_phase = 2; /* child dentry */
536 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb);
538 if (dir->i_mode & S_ISGID) {
539 if (S_ISDIR(rec->ur_mode))
540 rec->ur_mode |= S_ISGID;
543 dchild->d_fsdata = (void *)&dp;
544 dp.p_inum = (unsigned long)rec->ur_fid2->id;
549 handle = fsfilt_start(obd, dir, FSFILT_OP_CREATE, NULL);
551 GOTO(cleanup, rc = PTR_ERR(handle));
552 rc = ll_vfs_create(dir, dchild, rec->ur_mode, NULL);
557 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
559 GOTO(cleanup, rc = PTR_ERR(handle));
560 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
565 handle = fsfilt_start(obd, dir, FSFILT_OP_SYMLINK, NULL);
567 GOTO(cleanup, rc = PTR_ERR(handle));
568 if (rec->ur_tgt == NULL) /* no target supplied */
569 rc = -EINVAL; /* -EPROTO? */
571 rc = vfs_symlink(dir, dchild, rec->ur_tgt);
579 int rdev = rec->ur_rdev;
580 handle = fsfilt_start(obd, dir, FSFILT_OP_MKNOD, NULL);
582 GOTO(cleanup, (handle = NULL, rc = PTR_ERR(handle)));
583 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
588 CERROR("bad file type %o creating %s\n", type, rec->ur_name);
589 dchild->d_fsdata = NULL;
590 GOTO(cleanup, rc = -EINVAL);
593 /* In case we stored the desired inum in here, we want to clean up. */
594 if (dchild->d_fsdata == (void *)(unsigned long)rec->ur_fid2->id)
595 dchild->d_fsdata = NULL;
598 CDEBUG(D_INODE, "error during create: %d\n", rc);
602 struct inode *inode = dchild->d_inode;
603 struct mds_body *body;
606 LTIME_S(iattr.ia_atime) = rec->ur_time;
607 LTIME_S(iattr.ia_ctime) = rec->ur_time;
608 LTIME_S(iattr.ia_mtime) = rec->ur_time;
609 iattr.ia_uid = rec->ur_fsuid;
610 if (dir->i_mode & S_ISGID)
611 iattr.ia_gid = dir->i_gid;
613 iattr.ia_gid = rec->ur_fsgid;
614 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
615 ATTR_MTIME | ATTR_CTIME;
617 if (rec->ur_fid2->id) {
618 LASSERT(rec->ur_fid2->id == inode->i_ino);
619 inode->i_generation = rec->ur_fid2->generation;
620 /* Dirtied and committed by the upcoming setattr. */
621 CDEBUG(D_INODE, "recreated ino %lu with gen %u\n",
622 inode->i_ino, inode->i_generation);
624 struct lustre_handle child_ino_lockh;
625 struct ldlm_res_id child_res_id =
626 { .name = { inode->i_ino, 0 } };
629 CDEBUG(D_INODE, "created ino %lu with gen %x\n",
630 inode->i_ino, inode->i_generation);
632 /* The inode we were allocated may have just been freed
633 * by an unlink operation. We take this lock to
634 * synchronize against the matching reply-ack-lock taken
635 * in unlink, to avoid replay problems if this reply
636 * makes it out to the client but the unlink's does not.
637 * See bug 2029 for more detail.*/
638 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
639 NULL, child_res_id, LDLM_PLAIN,
640 NULL, 0, LCK_EX, &lock_flags,
642 mds_blocking_ast, NULL,
644 if (rc != ELDLM_OK) {
645 CERROR("error locking for unlink/create sync: "
648 ldlm_lock_decref(&child_ino_lockh, LCK_EX);
652 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
654 CERROR("error on child setattr: rc = %d\n", rc);
656 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
657 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
659 CERROR("error on parent setattr: rc = %d\n", rc);
661 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
662 mds_pack_inode2fid(&body->fid1, inode);
663 mds_pack_inode2body(body, inode);
668 err = mds_finish_transno(mds, dir, handle, req, rc, 0);
671 /* Destroy the file we just created. This should not need
672 * extra journal credits, as we have already modified all of
673 * the blocks needed in order to create the file in the first
678 err = vfs_rmdir(dir, dchild);
680 CERROR("rmdir in error path: %d\n", err);
683 err = vfs_unlink(dir, dchild);
685 CERROR("unlink in error path: %d\n", err);
691 switch (cleanup_phase) {
692 case 2: /* child dentry */
694 case 1: /* locked parent dentry */
696 ldlm_lock_decref(&lockh, LCK_PW);
698 ldlm_put_lock_into_req(req, &lockh, LCK_PW);
704 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
711 int res_gt(struct ldlm_res_id *res1, struct ldlm_res_id *res2)
715 for (i = 0; i < RES_NAME_SIZE; i++) {
716 /* return 1 here, because enqueue_ordered will skip resources
717 * of all zeroes if they're sorted to the end of the list. */
718 if (res1->name[i] == 0 && res2->name[i] != 0)
720 if (res2->name[i] == 0 && res1->name[i] != 0)
723 if (res1->name[i] > res2->name[i])
725 if (res1->name[i] < res2->name[i])
731 /* This function doesn't use ldlm_match_or_enqueue because we're always called
732 * with EX or PW locks, and the MDS is no longer allowed to match write locks,
733 * because they take the place of local semaphores.
735 * One or two locks are taken in numerical order. A res_id->name[0] of 0 means
736 * no lock is taken for that res_id. Must be at least one non-zero res_id. */
737 int enqueue_ordered_locks(struct obd_device *obd, struct ldlm_res_id *p1_res_id,
738 struct lustre_handle *p1_lockh, int p1_lock_mode,
739 struct ldlm_res_id *p2_res_id,
740 struct lustre_handle *p2_lockh, int p2_lock_mode)
742 struct ldlm_res_id *res_id[2] = { p1_res_id, p2_res_id };
743 struct lustre_handle *handles[2] = { p1_lockh, p2_lockh };
744 int lock_modes[2] = { p1_lock_mode, p2_lock_mode };
748 LASSERT(p1_res_id != NULL && p2_res_id != NULL);
750 CDEBUG(D_INFO, "locks before: "LPU64"/"LPU64"\n",
751 res_id[0]->name[0], res_id[1]->name[0]);
753 if (res_gt(p1_res_id, p2_res_id)) {
754 handles[1] = p1_lockh;
755 handles[0] = p2_lockh;
756 res_id[1] = p1_res_id;
757 res_id[0] = p2_res_id;
758 lock_modes[1] = p1_lock_mode;
759 lock_modes[0] = p2_lock_mode;
762 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"\n",
763 res_id[0]->name[0], res_id[1]->name[0]);
765 flags = LDLM_FL_LOCAL_ONLY;
766 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, NULL, *res_id[0],
767 LDLM_PLAIN, NULL, 0, lock_modes[0], &flags,
768 ldlm_completion_ast, mds_blocking_ast, NULL,
772 ldlm_lock_dump_handle(D_OTHER, handles[0]);
774 if (memcmp(res_id[0], res_id[1], sizeof(*res_id[0])) == 0) {
775 memcpy(handles[1], handles[0], sizeof(*(handles[1])));
776 ldlm_lock_addref(handles[1], lock_modes[1]);
777 } else if (res_id[1]->name[0] != 0) {
778 flags = LDLM_FL_LOCAL_ONLY;
779 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, NULL,
780 *res_id[1], LDLM_PLAIN, NULL, 0,
781 lock_modes[1], &flags,ldlm_completion_ast,
782 mds_blocking_ast, NULL, handles[1]);
783 if (rc != ELDLM_OK) {
784 ldlm_lock_decref(handles[0], lock_modes[0]);
787 ldlm_lock_dump_handle(D_OTHER, handles[1]);
793 int enqueue_4ordered_locks(struct obd_device *obd,struct ldlm_res_id *p1_res_id,
794 struct lustre_handle *p1_lockh, int p1_lock_mode,
795 struct ldlm_res_id *p2_res_id,
796 struct lustre_handle *p2_lockh, int p2_lock_mode,
797 struct ldlm_res_id *c1_res_id,
798 struct lustre_handle *c1_lockh, int c1_lock_mode,
799 struct ldlm_res_id *c2_res_id,
800 struct lustre_handle *c2_lockh, int c2_lock_mode)
802 struct ldlm_res_id *res_id[5] = { p1_res_id, p2_res_id,
803 c1_res_id, c2_res_id };
804 struct lustre_handle *dlm_handles[5] = { p1_lockh, p2_lockh,
805 c1_lockh, c2_lockh };
806 int lock_modes[5] = { p1_lock_mode, p2_lock_mode,
807 c1_lock_mode, c2_lock_mode };
808 int rc, i, j, sorted, flags;
811 CDEBUG(D_DLMTRACE, "locks before: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
812 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
815 /* simple insertion sort - we have at most 4 elements */
816 for (i = 1; i < 4; i++) {
818 dlm_handles[4] = dlm_handles[i];
819 res_id[4] = res_id[i];
820 lock_modes[4] = lock_modes[i];
824 if (res_gt(res_id[j], res_id[4])) {
825 dlm_handles[j + 1] = dlm_handles[j];
826 res_id[j + 1] = res_id[j];
827 lock_modes[j + 1] = lock_modes[j];
832 } while (j >= 0 && !sorted);
834 dlm_handles[j + 1] = dlm_handles[4];
835 res_id[j + 1] = res_id[4];
836 lock_modes[j + 1] = lock_modes[4];
839 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
840 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
843 /* XXX we could send ASTs on all these locks first before blocking? */
844 for (i = 0; i < 4; i++) {
846 if (res_id[i]->name[0] == 0)
849 memcmp(res_id[i], res_id[i-1], sizeof(*res_id[i])) == 0) {
850 memcpy(dlm_handles[i], dlm_handles[i-1],
851 sizeof(*(dlm_handles[i])));
852 ldlm_lock_addref(dlm_handles[i], lock_modes[i]);
854 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
855 NULL, *res_id[i], LDLM_PLAIN,
856 NULL, 0, lock_modes[i], &flags,
858 mds_blocking_ast, NULL,
861 GOTO(out_err, rc = -EIO);
862 ldlm_lock_dump_handle(D_OTHER, dlm_handles[i]);
869 ldlm_lock_decref(dlm_handles[i], lock_modes[i]);
874 /* In the unlikely case that the child changed while we were waiting
875 * on the lock, we need to drop the lock on the old child and either:
876 * - if the child has a lower resource name, then we have to also
877 * drop the parent lock and regain the locks in the right order
878 * - in the rename case, if the child has a lower resource name than one of
879 * the other parent/child resources (maxres) we also need to reget the locks
880 * - if the child has a higher resource name (this is the common case)
881 * we can just get the lock on the new child (still in lock order)
883 * Returns 0 if the child did not change or if it changed but could be locked.
884 * Returns 1 if the child changed and we need to re-lock (no locks held).
885 * Returns -ve error with a valid dchild (no locks held). */
886 static int mds_verify_child(struct obd_device *obd,
887 struct ldlm_res_id *parent_res_id,
888 struct lustre_handle *parent_lockh,
889 struct dentry *dparent, int parent_mode,
890 struct ldlm_res_id *child_res_id,
891 struct lustre_handle *child_lockh,
892 struct dentry **dchildp, int child_mode,
893 const char *name, int namelen,
894 struct ldlm_res_id *maxres)
896 struct dentry *vchild, *dchild = *dchildp;
897 int rc = 0, cleanup_phase = 2; /* parent, child locks */
900 vchild = ll_lookup_one_len(name, dparent, namelen - 1);
902 GOTO(cleanup, rc = PTR_ERR(vchild));
904 if (likely((vchild->d_inode == NULL && child_res_id->name[0] == 0) ||
905 (vchild->d_inode != NULL &&
906 child_res_id->name[0] == vchild->d_inode->i_ino &&
907 child_res_id->name[1] == vchild->d_inode->i_generation))) {
915 CDEBUG(D_DLMTRACE, "child inode changed: %p != %p (%lu != "LPU64")\n",
916 vchild->d_inode, dchild ? dchild->d_inode : 0,
917 vchild->d_inode ? vchild->d_inode->i_ino : 0,
918 child_res_id->name[0]);
919 if (child_res_id->name[0] != 0)
920 ldlm_lock_decref(child_lockh, child_mode);
924 cleanup_phase = 1; /* parent lock only */
925 *dchildp = dchild = vchild;
927 if (dchild->d_inode) {
929 child_res_id->name[0] = dchild->d_inode->i_ino;
930 child_res_id->name[1] = dchild->d_inode->i_generation;
932 if (res_gt(parent_res_id, child_res_id) ||
933 res_gt(maxres, child_res_id)) {
934 CDEBUG(D_DLMTRACE, "relock "LPU64"<("LPU64"|"LPU64")\n",
935 child_res_id->name[0], parent_res_id->name[0],
937 GOTO(cleanup, rc = 1);
940 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
941 NULL, *child_res_id, LDLM_PLAIN,
942 NULL, 0, child_mode, &flags,
943 ldlm_completion_ast, mds_blocking_ast,
946 GOTO(cleanup, rc = -EIO);
948 memset(child_res_id, 0, sizeof(*child_res_id));
954 switch(cleanup_phase) {
956 if (child_res_id->name[0] != 0)
957 ldlm_lock_decref(child_lockh, child_mode);
959 ldlm_lock_decref(parent_lockh, parent_mode);
965 int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds,
967 struct lustre_handle *parent_lockh,
968 struct dentry **dparentp, int parent_mode,
969 char *name, int namelen,
970 struct lustre_handle *child_lockh,
971 struct dentry **dchildp, int child_mode)
973 struct ldlm_res_id child_res_id = { .name = {0} };
974 struct ldlm_res_id parent_res_id = { .name = {0} };
976 int rc = 0, cleanup_phase = 0;
979 /* Step 1: Lookup parent */
980 *dparentp = mds_fid2dentry(mds, fid, NULL);
981 if (IS_ERR(*dparentp))
982 RETURN(rc = PTR_ERR(*dparentp));
983 LASSERT((*dparentp)->d_inode);
985 CDEBUG(D_INODE, "parent ino %lu, name %s\n",
986 (*dparentp)->d_inode->i_ino, name);
988 parent_res_id.name[0] = (*dparentp)->d_inode->i_ino;
989 parent_res_id.name[1] = (*dparentp)->d_inode->i_generation;
991 cleanup_phase = 1; /* parent dentry */
993 /* Step 2: Lookup child (without lock, to get resource name) */
994 *dchildp = ll_lookup_one_len(name, *dparentp, namelen - 1);
995 if (IS_ERR(*dchildp)) {
996 rc = PTR_ERR(*dchildp);
997 CDEBUG(D_INODE, "child lookup error %d\n", rc);
1001 inode = (*dchildp)->d_inode;
1003 inode = igrab(inode);
1007 child_res_id.name[0] = inode->i_ino;
1008 child_res_id.name[1] = inode->i_generation;
1012 cleanup_phase = 2; /* child dentry */
1014 /* Step 3: Lock parent and child in resource order. If child doesn't
1015 * exist, we still have to lock the parent and re-lookup. */
1016 rc = enqueue_ordered_locks(obd, &parent_res_id,parent_lockh,parent_mode,
1017 &child_res_id, child_lockh, child_mode);
1021 if (!(*dchildp)->d_inode)
1022 cleanup_phase = 3; /* parent lock */
1024 cleanup_phase = 4; /* child lock */
1026 /* Step 4: Re-lookup child to verify it hasn't changed since locking */
1027 rc = mds_verify_child(obd, &parent_res_id, parent_lockh, *dparentp,
1028 parent_mode, &child_res_id, child_lockh, dchildp,
1029 child_mode, name, namelen, &parent_res_id);
1039 switch (cleanup_phase) {
1041 ldlm_lock_decref(child_lockh, child_mode);
1043 ldlm_lock_decref(parent_lockh, parent_mode);
1054 void mds_reconstruct_generic(struct ptlrpc_request *req)
1056 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1058 mds_req_from_mcd(req, med->med_mcd);
1061 static int mds_reint_unlink(struct mds_update_record *rec, int offset,
1062 struct ptlrpc_request *req,
1063 struct lustre_handle *lh)
1065 struct dentry *dparent, *dchild;
1066 struct mds_obd *mds = mds_req2mds(req);
1067 struct obd_device *obd = req->rq_export->exp_obd;
1068 struct mds_body *body = NULL;
1069 struct inode *child_inode;
1070 struct lustre_handle parent_lockh, child_lockh, child_reuse_lockh;
1071 void *handle = NULL;
1072 int rc = 0, log_unlink = 0, cleanup_phase = 0;
1075 LASSERT(offset == 0 || offset == 2);
1077 DEBUG_REQ(D_INODE, req, "parent ino "LPU64"/%u, child %s",
1078 rec->ur_fid1->id, rec->ur_fid1->generation, rec->ur_name);
1080 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1082 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
1083 GOTO(cleanup, rc = -ENOENT);
1085 rc = mds_get_parent_child_locked(obd, mds, rec->ur_fid1,
1086 &parent_lockh, &dparent, LCK_PW,
1087 rec->ur_name, rec->ur_namelen,
1088 &child_lockh, &dchild, LCK_EX);
1092 cleanup_phase = 1; /* dchild, dparent, locks */
1094 child_inode = dchild->d_inode;
1095 if (child_inode == NULL) {
1096 CDEBUG(D_INODE, "child doesn't exist (dir %lu, name %s)\n",
1097 dparent->d_inode->i_ino, rec->ur_name);
1098 GOTO(cleanup, rc = -ENOENT);
1101 cleanup_phase = 2; /* dchild has a lock */
1103 /* Step 4: Get a lock on the ino to sync with creation WRT inode
1104 * reuse (see bug 2029). */
1105 rc = mds_lock_new_child(obd, child_inode, &child_reuse_lockh);
1109 cleanup_phase = 3; /* child inum lock */
1111 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dparent->d_inode->i_sb);
1113 /* ldlm_reply in buf[0] if called via intent */
1117 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
1118 LASSERT(body != NULL);
1120 /* If this is the last reference to this inode, get the OBD EA
1121 * data first so the client can destroy OST objects.
1122 * we only do the object removal if no open files remain.
1123 * Nobody can get at this name anymore because of the locks so
1124 * we make decisions here as to whether to remove the inode */
1125 if (S_ISREG(child_inode->i_mode) && child_inode->i_nlink == 1 &&
1126 mds_open_orphan_count(child_inode) == 0) {
1127 mds_pack_inode2fid(&body->fid1, child_inode);
1128 mds_pack_inode2body(body, child_inode);
1129 mds_pack_md(obd, req->rq_repmsg, offset + 1, body,
1131 if (!(body->valid & OBD_MD_FLEASIZE)) {
1132 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
1133 OBD_MD_FLATIME | OBD_MD_FLMTIME);
1139 /* We have to do these checks ourselves, in case we are making an
1140 * orphan. The client tells us whether rmdir() or unlink() was called,
1141 * so we need to return appropriate errors (bug 72).
1143 * We don't have to check permissions, because vfs_rename (called from
1144 * mds_open_unlink_rename) also calls may_delete. */
1145 if ((rec->ur_mode & S_IFMT) == S_IFDIR) {
1146 if (!S_ISDIR(child_inode->i_mode))
1147 GOTO(cleanup, rc = -ENOTDIR);
1149 if (S_ISDIR(child_inode->i_mode))
1150 GOTO(cleanup, rc = -EISDIR);
1153 if (child_inode->i_nlink == (S_ISDIR(child_inode->i_mode) ? 2 : 1) &&
1154 mds_open_orphan_count(child_inode) > 0) {
1155 rc = mds_open_unlink_rename(rec, obd, dparent, dchild, &handle);
1156 cleanup_phase = 4; /* transaction */
1160 /* Step 4: Do the unlink: we already verified ur_mode above (bug 72) */
1161 switch (child_inode->i_mode & S_IFMT) {
1163 /* Drop any lingering child directories before we start our
1164 * transaction, to avoid doing multiple inode dirty/delete
1165 * in our compound transaction (bug 1321). */
1166 shrink_dcache_parent(dchild);
1167 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
1170 GOTO(cleanup, rc = PTR_ERR(handle));
1171 cleanup_phase = 4; /* transaction */
1172 rc = vfs_rmdir(dparent->d_inode, dchild);
1175 handle = fsfilt_start(obd, dparent->d_inode,
1176 FSFILT_OP_UNLINK_LOG, NULL);
1178 GOTO(cleanup, rc = PTR_ERR(handle));
1180 cleanup_phase = 4; /* transaction */
1181 rc = vfs_unlink(dparent->d_inode, dchild);
1183 if (!rc && log_unlink)
1184 if (mds_log_op_unlink(obd, child_inode, req->rq_repmsg,
1186 body->valid |= OBD_MD_FLCOOKIE;
1194 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK,
1197 GOTO(cleanup, rc = PTR_ERR(handle));
1198 cleanup_phase = 4; /* transaction */
1199 rc = vfs_unlink(dparent->d_inode, dchild);
1202 CERROR("bad file type %o unlinking %s\n", rec->ur_mode,
1205 GOTO(cleanup, rc = -EINVAL);
1213 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
1214 LTIME_S(iattr.ia_mtime) = rec->ur_time;
1215 LTIME_S(iattr.ia_ctime) = rec->ur_time;
1217 err = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
1219 CERROR("error on parent setattr: rc = %d\n", err);
1222 switch(cleanup_phase) {
1224 rc = mds_finish_transno(mds, dparent->d_inode, handle, req,
1227 (void)obd_set_info(mds->mds_osc_exp, strlen("unlinked"),
1228 "unlinked", 0, NULL);
1229 case 3: /* child ino-reuse lock */
1230 if (rc && body != NULL) {
1231 // Don't unlink the OST objects if the MDS unlink failed
1235 ldlm_lock_decref(&child_reuse_lockh, LCK_EX);
1237 ldlm_put_lock_into_req(req, &child_reuse_lockh, LCK_EX);
1238 case 2: /* child lock */
1239 ldlm_lock_decref(&child_lockh, LCK_EX);
1240 case 1: /* child and parent dentry, parent lock */
1242 ldlm_lock_decref(&parent_lockh, LCK_PW);
1244 ldlm_put_lock_into_req(req, &parent_lockh, LCK_PW);
1250 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1253 req->rq_status = rc;
1257 static int mds_reint_link(struct mds_update_record *rec, int offset,
1258 struct ptlrpc_request *req,
1259 struct lustre_handle *lh)
1261 struct obd_device *obd = req->rq_export->exp_obd;
1262 struct dentry *de_src = NULL;
1263 struct dentry *de_tgt_dir = NULL;
1264 struct dentry *dchild = NULL;
1265 struct mds_obd *mds = mds_req2mds(req);
1266 struct lustre_handle *handle = NULL, tgt_dir_lockh, src_lockh;
1267 struct ldlm_res_id src_res_id = { .name = {0} };
1268 struct ldlm_res_id tgt_dir_res_id = { .name = {0} };
1269 int rc = 0, cleanup_phase = 0;
1272 LASSERT(offset == 0);
1274 DEBUG_REQ(D_INODE, req, "original "LPU64"/%u to "LPU64"/%u %s",
1275 rec->ur_fid1->id, rec->ur_fid1->generation,
1276 rec->ur_fid2->id, rec->ur_fid2->generation, rec->ur_name);
1278 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1280 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
1281 GOTO(cleanup, rc = -ENOENT);
1283 /* Step 1: Lookup the source inode and target directory by FID */
1284 de_src = mds_fid2dentry(mds, rec->ur_fid1, NULL);
1286 GOTO(cleanup, rc = PTR_ERR(de_src));
1288 cleanup_phase = 1; /* source dentry */
1290 de_tgt_dir = mds_fid2dentry(mds, rec->ur_fid2, NULL);
1291 if (IS_ERR(de_tgt_dir))
1292 GOTO(cleanup, rc = PTR_ERR(de_tgt_dir));
1294 cleanup_phase = 2; /* target directory dentry */
1296 CDEBUG(D_INODE, "linking %*s/%s to inode %lu\n",
1297 de_tgt_dir->d_name.len, de_tgt_dir->d_name.name, rec->ur_name,
1298 de_src->d_inode->i_ino);
1300 /* Step 2: Take the two locks */
1301 src_res_id.name[0] = de_src->d_inode->i_ino;
1302 src_res_id.name[1] = de_src->d_inode->i_generation;
1303 tgt_dir_res_id.name[0] = de_tgt_dir->d_inode->i_ino;
1304 tgt_dir_res_id.name[1] = de_tgt_dir->d_inode->i_generation;
1306 rc = enqueue_ordered_locks(obd, &src_res_id, &src_lockh, LCK_EX,
1307 &tgt_dir_res_id, &tgt_dir_lockh, LCK_EX);
1311 cleanup_phase = 3; /* locks */
1313 /* Step 3: Lookup the child */
1314 dchild = ll_lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen-1);
1315 if (IS_ERR(dchild)) {
1316 rc = PTR_ERR(dchild);
1317 if (rc != -EPERM && rc != -EACCES)
1318 CERROR("child lookup error %d\n", rc);
1322 cleanup_phase = 4; /* child dentry */
1324 if (dchild->d_inode) {
1325 CDEBUG(D_INODE, "child exists (dir %lu, name %s)\n",
1326 de_tgt_dir->d_inode->i_ino, rec->ur_name);
1331 /* Step 4: Do it. */
1332 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
1334 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
1335 if (IS_ERR(handle)) {
1336 rc = PTR_ERR(handle);
1340 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
1341 if (rc && rc != -EPERM && rc != -EACCES)
1342 CERROR("vfs_link error %d\n", rc);
1344 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
1345 handle, req, rc, 0);
1348 switch (cleanup_phase) {
1349 case 4: /* child dentry */
1353 ldlm_lock_decref(&src_lockh, LCK_EX);
1354 ldlm_lock_decref(&tgt_dir_lockh, LCK_EX);
1356 ldlm_put_lock_into_req(req, &src_lockh, LCK_EX);
1357 ldlm_put_lock_into_req(req, &tgt_dir_lockh, LCK_EX);
1359 case 2: /* target dentry */
1361 case 1: /* source dentry */
1366 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1369 req->rq_status = rc;
1374 * add a hard link in the PENDING directory, only used by rename()
1376 static int mds_add_link_orphan(struct mds_update_record *rec,
1377 struct obd_device *obd,
1378 struct dentry *dentry)
1380 struct mds_obd *mds = &obd->u.mds;
1381 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1382 struct dentry *pending_child;
1383 char fidname[LL_FID_NAMELEN];
1387 LASSERT(dentry->d_inode);
1388 LASSERT(!mds_inode_is_orphan(dentry->d_inode));
1390 down(&pending_dir->i_sem);
1391 fidlen = ll_fid2str(fidname, dentry->d_inode->i_ino,
1392 dentry->d_inode->i_generation);
1394 CDEBUG(D_ERROR, "pending destroy of %dx open file %s = %s\n",
1395 mds_open_orphan_count(dentry->d_inode),
1396 rec->ur_name, fidname);
1398 pending_child = lookup_one_len(fidname, mds->mds_pending_dir, fidlen);
1399 if (IS_ERR(pending_child))
1400 GOTO(out_lock, rc = PTR_ERR(pending_child));
1402 if (pending_child->d_inode != NULL) {
1403 CERROR("re-destroying orphan file %s?\n", rec->ur_name);
1404 LASSERT(pending_child->d_inode == dentry->d_inode);
1405 GOTO(out_dput, rc = 0);
1409 rc = vfs_link(dentry, pending_dir, pending_child);
1412 CERROR("error addlink orphan %s to PENDING: rc = %d\n",
1415 mds_inode_set_orphan(dentry->d_inode);
1417 l_dput(pending_child);
1419 up(&pending_dir->i_sem);
1423 /* The idea here is that we need to get four locks in the end:
1424 * one on each parent directory, one on each child. We need to take
1425 * these locks in some kind of order (to avoid deadlocks), and the order
1426 * I selected is "increasing resource number" order. We need to look up
1427 * the children, however, before we know what the resource number(s) are.
1428 * Thus the following plan:
1430 * 1,2. Look up the parents
1431 * 3,4. Look up the children
1432 * 5. Take locks on the parents and children, in order
1433 * 6. Verify that the children haven't changed since they were looked up
1435 * If there was a race and the children changed since they were first looked
1436 * up, it is possible that mds_verify_child() will be able to just grab the
1437 * lock on the new child resource (if it has a higher resource than any other)
1438 * but we need to compare against not only its parent, but also against the
1439 * parent and child of the "other half" of the rename, hence maxres_{src,tgt}.
1441 * We need the fancy igrab() on the child inodes because we aren't holding a
1442 * lock on the parent after the lookup is done, so dentry->d_inode may change
1443 * at any time, and igrab() itself doesn't like getting passed a NULL argument.
1445 static int mds_get_parents_children_locked(struct obd_device *obd,
1446 struct mds_obd *mds,
1447 struct ll_fid *p1_fid,
1448 struct dentry **de_srcdirp,
1449 struct ll_fid *p2_fid,
1450 struct dentry **de_tgtdirp,
1452 const char *old_name, int old_len,
1453 struct dentry **de_oldp,
1454 const char *new_name, int new_len,
1455 struct dentry **de_newp,
1456 struct lustre_handle *dlm_handles,
1459 struct ldlm_res_id p1_res_id = { .name = {0} };
1460 struct ldlm_res_id p2_res_id = { .name = {0} };
1461 struct ldlm_res_id c1_res_id = { .name = {0} };
1462 struct ldlm_res_id c2_res_id = { .name = {0} };
1463 struct ldlm_res_id *maxres_src, *maxres_tgt;
1464 struct inode *inode;
1465 int rc = 0, cleanup_phase = 0;
1468 /* Step 1: Lookup the source directory */
1469 *de_srcdirp = mds_fid2dentry(mds, p1_fid, NULL);
1470 if (IS_ERR(*de_srcdirp))
1471 GOTO(cleanup, rc = PTR_ERR(*de_srcdirp));
1473 cleanup_phase = 1; /* source directory dentry */
1475 p1_res_id.name[0] = (*de_srcdirp)->d_inode->i_ino;
1476 p1_res_id.name[1] = (*de_srcdirp)->d_inode->i_generation;
1478 /* Step 2: Lookup the target directory */
1479 if (memcmp(p1_fid, p2_fid, sizeof(*p1_fid)) == 0) {
1480 *de_tgtdirp = dget(*de_srcdirp);
1482 *de_tgtdirp = mds_fid2dentry(mds, p2_fid, NULL);
1483 if (IS_ERR(*de_tgtdirp))
1484 GOTO(cleanup, rc = PTR_ERR(*de_tgtdirp));
1487 cleanup_phase = 2; /* target directory dentry */
1489 p2_res_id.name[0] = (*de_tgtdirp)->d_inode->i_ino;
1490 p2_res_id.name[1] = (*de_tgtdirp)->d_inode->i_generation;
1492 /* Step 3: Lookup the source child entry */
1493 *de_oldp = ll_lookup_one_len(old_name, *de_srcdirp, old_len - 1);
1494 if (IS_ERR(*de_oldp)) {
1495 rc = PTR_ERR(*de_oldp);
1496 CERROR("old child lookup error (%*s): %d\n",
1497 old_len - 1, old_name, rc);
1501 cleanup_phase = 3; /* original name dentry */
1503 inode = (*de_oldp)->d_inode;
1505 inode = igrab(inode);
1507 GOTO(cleanup, rc = -ENOENT);
1509 c1_res_id.name[0] = inode->i_ino;
1510 c1_res_id.name[1] = inode->i_generation;
1513 /* Step 4: Lookup the target child entry */
1514 *de_newp = ll_lookup_one_len(new_name, *de_tgtdirp, new_len - 1);
1515 if (IS_ERR(*de_newp)) {
1516 rc = PTR_ERR(*de_newp);
1517 CERROR("new child lookup error (%*s): %d\n",
1518 old_len - 1, old_name, rc);
1522 cleanup_phase = 4; /* target dentry */
1524 inode = (*de_newp)->d_inode;
1526 inode = igrab(inode);
1530 c2_res_id.name[0] = inode->i_ino;
1531 c2_res_id.name[1] = inode->i_generation;
1535 /* Step 5: Take locks on the parents and child(ren) */
1536 maxres_src = &p1_res_id;
1537 maxres_tgt = &p2_res_id;
1538 cleanup_phase = 4; /* target dentry */
1540 if (c1_res_id.name[0] != 0 && res_gt(&c1_res_id, &p1_res_id))
1541 maxres_src = &c1_res_id;
1542 if (c2_res_id.name[0] != 0 && res_gt(&c2_res_id, &p2_res_id))
1543 maxres_tgt = &c2_res_id;
1545 rc = enqueue_4ordered_locks(obd, &p1_res_id,&dlm_handles[0],parent_mode,
1546 &p2_res_id, &dlm_handles[1], parent_mode,
1547 &c1_res_id, &dlm_handles[2], child_mode,
1548 &c2_res_id, &dlm_handles[3], child_mode);
1552 cleanup_phase = 6; /* parent and child(ren) locks */
1554 /* Step 6a: Re-lookup source child to verify it hasn't changed */
1555 rc = mds_verify_child(obd, &p1_res_id, &dlm_handles[0], *de_srcdirp,
1556 parent_mode, &c1_res_id, &dlm_handles[2], de_oldp,
1557 child_mode, old_name, old_len, maxres_tgt);
1559 if (c2_res_id.name[0] != 0)
1560 ldlm_lock_decref(&dlm_handles[3], child_mode);
1561 ldlm_lock_decref(&dlm_handles[1], parent_mode);
1568 if ((*de_oldp)->d_inode == NULL)
1569 GOTO(cleanup, rc = -ENOENT);
1571 /* Step 6b: Re-lookup target child to verify it hasn't changed */
1572 rc = mds_verify_child(obd, &p2_res_id, &dlm_handles[1], *de_tgtdirp,
1573 parent_mode, &c2_res_id, &dlm_handles[3], de_newp,
1574 child_mode, new_name, new_len, maxres_src);
1576 ldlm_lock_decref(&dlm_handles[2], child_mode);
1577 ldlm_lock_decref(&dlm_handles[0], parent_mode);
1587 switch (cleanup_phase) {
1588 case 6: /* child lock(s) */
1589 if (c2_res_id.name[0] != 0)
1590 ldlm_lock_decref(&dlm_handles[3], child_mode);
1591 if (c1_res_id.name[0] != 0)
1592 ldlm_lock_decref(&dlm_handles[2], child_mode);
1593 case 5: /* parent locks */
1594 ldlm_lock_decref(&dlm_handles[1], parent_mode);
1595 ldlm_lock_decref(&dlm_handles[0], parent_mode);
1596 case 4: /* target dentry */
1598 case 3: /* source dentry */
1600 case 2: /* target directory dentry */
1601 l_dput(*de_tgtdirp);
1602 case 1: /* source directry dentry */
1603 l_dput(*de_srcdirp);
1610 static int mds_reint_rename(struct mds_update_record *rec, int offset,
1611 struct ptlrpc_request *req,
1612 struct lustre_handle *lockh)
1614 struct obd_device *obd = req->rq_export->exp_obd;
1615 struct dentry *de_srcdir = NULL;
1616 struct dentry *de_tgtdir = NULL;
1617 struct dentry *de_old = NULL;
1618 struct dentry *de_new = NULL;
1619 struct mds_obd *mds = mds_req2mds(req);
1620 struct lustre_handle dlm_handles[4];
1621 struct mds_body *body = NULL;
1622 int rc = 0, lock_count = 3;
1623 int cleanup_phase = 0;
1624 void *handle = NULL;
1627 LASSERT(offset == 0);
1629 DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u %s to "LPU64"/%u %s",
1630 rec->ur_fid1->id, rec->ur_fid1->generation, rec->ur_name,
1631 rec->ur_fid2->id, rec->ur_fid2->generation, rec->ur_tgt);
1633 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1635 rc = mds_get_parents_children_locked(obd, mds, rec->ur_fid1, &de_srcdir,
1636 rec->ur_fid2, &de_tgtdir, LCK_PW,
1637 rec->ur_name, rec->ur_namelen,
1638 &de_old, rec->ur_tgt,
1639 rec->ur_tgtlen, &de_new,
1640 dlm_handles, LCK_EX);
1644 cleanup_phase = 1; /* parent(s), children, locks */
1646 if (de_new->d_inode)
1649 /* sanity check for src inode */
1650 if (de_old->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
1651 de_old->d_inode->i_ino == de_tgtdir->d_inode->i_ino)
1652 GOTO(cleanup, rc = -EINVAL);
1654 /* sanity check for dest inode */
1655 if (de_new->d_inode &&
1656 (de_new->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
1657 de_new->d_inode->i_ino == de_tgtdir->d_inode->i_ino))
1658 GOTO(cleanup, rc = -EINVAL);
1660 if (de_old->d_inode == de_new->d_inode) {
1661 GOTO(cleanup, rc = 0);
1664 /* if we are about to remove the target at first, pass the EA of
1665 * that inode to client to perform and cleanup on OST */
1666 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
1667 LASSERT(body != NULL);
1669 if (de_new->d_inode &&
1670 S_ISREG(de_new->d_inode->i_mode) &&
1671 de_new->d_inode->i_nlink == 1 &&
1672 mds_open_orphan_count(de_new->d_inode) == 0) {
1673 mds_pack_inode2fid(&body->fid1, de_new->d_inode);
1674 mds_pack_inode2body(body, de_new->d_inode);
1675 mds_pack_md(obd, req->rq_repmsg, 1, body, de_new->d_inode, 1);
1676 if (!(body->valid & OBD_MD_FLEASIZE)) {
1677 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
1678 OBD_MD_FLATIME | OBD_MD_FLMTIME);
1680 /* XXX need log unlink? */
1684 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
1685 de_srcdir->d_inode->i_sb);
1687 handle = fsfilt_start(obd, de_tgtdir->d_inode, FSFILT_OP_RENAME, NULL);
1689 GOTO(cleanup, rc = PTR_ERR(handle));
1691 /* FIXME need adjust the journal block count? */
1692 /* if the target should be moved to PENDING, we at first increase the
1693 * link and later vfs_rename() will decrease the link count again */
1694 if (de_new->d_inode &&
1695 S_ISREG(de_new->d_inode->i_mode) &&
1696 de_new->d_inode->i_nlink == 1 &&
1697 mds_open_orphan_count(de_new->d_inode) > 0) {
1698 rc = mds_add_link_orphan(rec, obd, de_new);
1704 de_old->d_fsdata = req;
1705 de_new->d_fsdata = req;
1706 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
1711 rc = mds_finish_transno(mds, de_tgtdir ? de_tgtdir->d_inode : NULL,
1712 handle, req, rc, 0);
1713 switch (cleanup_phase) {
1716 if (lock_count == 4)
1717 ldlm_lock_decref(&(dlm_handles[3]), LCK_EX);
1718 ldlm_lock_decref(&(dlm_handles[2]), LCK_EX);
1719 ldlm_lock_decref(&(dlm_handles[1]), LCK_PW);
1720 ldlm_lock_decref(&(dlm_handles[0]), LCK_PW);
1722 if (lock_count == 4)
1723 ldlm_put_lock_into_req(req,
1724 &(dlm_handles[3]), LCK_EX);
1725 ldlm_put_lock_into_req(req, &(dlm_handles[2]), LCK_EX);
1726 ldlm_put_lock_into_req(req, &(dlm_handles[1]), LCK_PW);
1727 ldlm_put_lock_into_req(req, &(dlm_handles[0]), LCK_PW);
1736 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1739 req->rq_status = rc;
1743 typedef int (*mds_reinter)(struct mds_update_record *, int offset,
1744 struct ptlrpc_request *, struct lustre_handle *);
1746 static mds_reinter reinters[REINT_MAX + 1] = {
1747 [REINT_SETATTR] mds_reint_setattr,
1748 [REINT_CREATE] mds_reint_create,
1749 [REINT_UNLINK] mds_reint_unlink,
1750 [REINT_LINK] mds_reint_link,
1751 [REINT_RENAME] mds_reint_rename,
1752 [REINT_OPEN] mds_open
1755 int mds_reint_rec(struct mds_update_record *rec, int offset,
1756 struct ptlrpc_request *req, struct lustre_handle *lockh)
1758 struct obd_device *obd = req->rq_export->exp_obd;
1759 struct obd_run_ctxt saved;
1763 /* checked by unpacker */
1764 LASSERT(rec->ur_opcode <= REINT_MAX &&
1765 reinters[rec->ur_opcode] != NULL);
1767 push_ctxt(&saved, &obd->obd_ctxt, &rec->ur_uc);
1768 rc = reinters[rec->ur_opcode] (rec, offset, req, lockh);
1769 pop_ctxt(&saved, &obd->obd_ctxt, &rec->ur_uc);