4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LMV
39 #include <linux/slab.h>
40 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/pagemap.h>
44 #include <linux/math64.h>
45 #include <linux/seq_file.h>
46 #include <linux/namei.h>
47 #include <linux/lustre_intent.h>
49 #include <liblustre.h>
52 #include <obd_support.h>
53 #include <lustre/lustre_idl.h>
54 #include <lustre_lib.h>
55 #include <lustre_net.h>
56 #include <lustre_dlm.h>
57 #include <lustre_mdc.h>
58 #include <obd_class.h>
59 #include <lprocfs_status.h>
60 #include "lmv_internal.h"
62 static int lmv_intent_remote(struct obd_export *exp, struct lookup_intent *it,
63 const struct lu_fid *parent_fid,
64 struct ptlrpc_request **reqp,
65 ldlm_blocking_callback cb_blocking,
66 __u64 extra_lock_flags)
68 struct obd_device *obd = exp->exp_obd;
69 struct lmv_obd *lmv = &obd->u.lmv;
70 struct ptlrpc_request *req = NULL;
71 struct lustre_handle plock;
72 struct md_op_data *op_data;
73 struct lmv_tgt_desc *tgt;
74 struct mdt_body *body;
79 body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
83 LASSERT((body->valid & OBD_MD_MDS));
86 * Unfortunately, we have to lie to MDC/MDS to retrieve
87 * attributes llite needs and provideproper locking.
89 if (it->it_op & IT_LOOKUP)
90 it->it_op = IT_GETATTR;
93 * We got LOOKUP lock, but we really need attrs.
95 pmode = it->d.lustre.it_lock_mode;
97 plock.cookie = it->d.lustre.it_lock_handle;
98 it->d.lustre.it_lock_mode = 0;
99 it->d.lustre.it_data = NULL;
102 LASSERT(fid_is_sane(&body->fid1));
104 tgt = lmv_find_target(lmv, &body->fid1);
106 GOTO(out, rc = PTR_ERR(tgt));
108 OBD_ALLOC_PTR(op_data);
110 GOTO(out, rc = -ENOMEM);
112 op_data->op_fid1 = body->fid1;
113 /* Sent the parent FID to the remote MDT */
114 if (parent_fid != NULL) {
115 /* The parent fid is only for remote open to
116 * check whether the open is from OBF,
117 * see mdt_cross_open */
118 LASSERT(it->it_op & IT_OPEN);
119 op_data->op_fid2 = *parent_fid;
120 /* Add object FID to op_fid3, in case it needs to check stale
121 * (M_CHECK_STALE), see mdc_finish_intent_lock */
122 op_data->op_fid3 = body->fid1;
125 op_data->op_bias = MDS_CROSS_REF;
126 CDEBUG(D_INODE, "REMOTE_INTENT with fid="DFID" -> mds #%d\n",
127 PFID(&body->fid1), tgt->ltd_idx);
129 rc = md_intent_lock(tgt->ltd_exp, op_data, it, &req, cb_blocking,
132 GOTO(out_free_op_data, rc);
135 * LLite needs LOOKUP lock to track dentry revocation in order to
136 * maintain dcache consistency. Thus drop UPDATE|PERM lock here
137 * and put LOOKUP in request.
139 if (it->d.lustre.it_lock_mode != 0) {
140 it->d.lustre.it_remote_lock_handle =
141 it->d.lustre.it_lock_handle;
142 it->d.lustre.it_remote_lock_mode = it->d.lustre.it_lock_mode;
146 it->d.lustre.it_lock_handle = plock.cookie;
147 it->d.lustre.it_lock_mode = pmode;
152 OBD_FREE_PTR(op_data);
155 ldlm_lock_decref(&plock, pmode);
157 ptlrpc_req_finished(*reqp);
163 int lmv_revalidate_slaves(struct obd_export *exp, struct mdt_body *mbody,
164 struct lmv_stripe_md *lsm,
165 ldlm_blocking_callback cb_blocking,
166 int extra_lock_flags)
168 struct obd_device *obd = exp->exp_obd;
169 struct lmv_obd *lmv = &obd->u.lmv;
170 struct mdt_body *body;
171 struct md_op_data *op_data;
172 unsigned long size = 0;
173 unsigned long nlink = 0;
183 * revalidate slaves has some problems, temporarily return,
184 * we may not need that
186 OBD_ALLOC_PTR(op_data);
191 * Loop over the stripe information, check validity and update them
192 * from MDS if needed.
194 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
196 struct lookup_intent it = { .it_op = IT_GETATTR };
197 struct ptlrpc_request *req = NULL;
198 struct lustre_handle *lockh = NULL;
199 struct lmv_tgt_desc *tgt = NULL;
202 fid = lsm->lsm_md_oinfo[i].lmo_fid;
203 inode = lsm->lsm_md_oinfo[i].lmo_root;
206 * Prepare op_data for revalidating. Note that @fid2 shluld be
207 * defined otherwise it will go to server and take new lock
208 * which is not needed here.
210 memset(op_data, 0, sizeof(*op_data));
211 op_data->op_fid1 = fid;
212 op_data->op_fid2 = fid;
214 tgt = lmv_locate_mds(lmv, op_data, &fid);
216 GOTO(cleanup, rc = PTR_ERR(tgt));
218 CDEBUG(D_INODE, "Revalidate slave "DFID" -> mds #%d\n",
219 PFID(&fid), tgt->ltd_idx);
221 rc = md_intent_lock(tgt->ltd_exp, op_data, &it, &req,
222 cb_blocking, extra_lock_flags);
226 lockh = (struct lustre_handle *)&it.d.lustre.it_lock_handle;
227 if (rc > 0 && req == NULL) {
228 /* slave inode is still valid */
229 CDEBUG(D_INODE, "slave "DFID" is still valid.\n",
233 /* refresh slave from server */
234 body = req_capsule_server_get(&req->rq_pill,
236 LASSERT(body != NULL);
237 if (unlikely(body->nlink < 2)) {
238 CERROR("%s: nlink %d < 2 corrupt stripe %d "DFID
239 ":" DFID"\n", obd->obd_name, body->nlink,
240 i, PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
241 PFID(&lsm->lsm_md_oinfo[0].lmo_fid));
244 ptlrpc_req_finished(req);
246 if (it.d.lustre.it_lock_mode && lockh) {
247 ldlm_lock_decref(lockh,
248 it.d.lustre.it_lock_mode);
249 it.d.lustre.it_lock_mode = 0;
252 GOTO(cleanup, rc = -EIO);
256 i_size_write(inode, body->size);
257 set_nlink(inode, body->nlink);
258 LTIME_S(inode->i_atime) = body->atime;
259 LTIME_S(inode->i_ctime) = body->ctime;
260 LTIME_S(inode->i_mtime) = body->mtime;
263 ptlrpc_req_finished(req);
266 md_set_lock_data(tgt->ltd_exp, &lockh->cookie, inode, NULL);
268 size += i_size_read(inode);
271 nlink += inode->i_nlink - 2;
273 nlink += inode->i_nlink;
275 atime = LTIME_S(inode->i_atime) > atime ?
276 LTIME_S(inode->i_atime) : atime;
277 ctime = LTIME_S(inode->i_ctime) > ctime ?
278 LTIME_S(inode->i_ctime) : ctime;
279 mtime = LTIME_S(inode->i_mtime) > mtime ?
280 LTIME_S(inode->i_mtime) : mtime;
282 if (it.d.lustre.it_lock_mode != 0 && lockh != NULL) {
283 ldlm_lock_decref(lockh, it.d.lustre.it_lock_mode);
284 it.d.lustre.it_lock_mode = 0;
287 CDEBUG(D_INODE, "i %d "DFID" size %llu, nlink %u, atime "
288 "%lu, mtime %lu, ctime %lu.\n", i, PFID(&fid),
289 i_size_read(inode), inode->i_nlink,
290 LTIME_S(inode->i_atime), LTIME_S(inode->i_mtime),
291 LTIME_S(inode->i_ctime));
295 * update attr of master request.
297 CDEBUG(D_INODE, "Return refreshed attrs: size = %lu nlink %lu atime "
298 LPU64 "ctime "LPU64" mtime "LPU64" for " DFID"\n", size, nlink,
299 atime, ctime, mtime, PFID(&lsm->lsm_md_oinfo[0].lmo_fid));
302 mbody->atime = atime;
303 mbody->ctime = ctime;
304 mbody->mtime = mtime;
307 OBD_FREE_PTR(op_data);
313 int lmv_revalidate_slaves(struct obd_export *exp, struct mdt_body *mbody,
314 struct lmv_stripe_md *lsm,
315 ldlm_blocking_callback cb_blocking,
316 int extra_lock_flags)
324 * IT_OPEN is intended to open (and create, possible) an object. Parent (pid)
327 int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
328 struct lookup_intent *it, struct ptlrpc_request **reqp,
329 ldlm_blocking_callback cb_blocking, __u64 extra_lock_flags)
331 struct obd_device *obd = exp->exp_obd;
332 struct lmv_obd *lmv = &obd->u.lmv;
333 struct lmv_tgt_desc *tgt;
334 struct mdt_body *body;
338 /* Note: client might open with some random flags(sanity 33b), so we can
339 * not make sure op_fid2 is being initialized with BY_FID flag */
340 if (it->it_flags & MDS_OPEN_BY_FID && fid_is_sane(&op_data->op_fid2)) {
341 if (op_data->op_mea1 != NULL) {
342 struct lmv_stripe_md *lsm = op_data->op_mea1;
343 const struct lmv_oinfo *oinfo;
345 oinfo = lsm_name_to_stripe_info(lsm, op_data->op_name,
346 op_data->op_namelen);
348 RETURN(PTR_ERR(oinfo));
349 op_data->op_fid1 = oinfo->lmo_fid;
352 tgt = lmv_find_target(lmv, &op_data->op_fid2);
354 RETURN(PTR_ERR(tgt));
356 op_data->op_mds = tgt->ltd_idx;
358 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
360 RETURN(PTR_ERR(tgt));
363 /* If it is ready to open the file by FID, do not need
364 * allocate FID at all, otherwise it will confuse MDT */
365 if ((it->it_op & IT_CREAT) &&
366 !(it->it_flags & MDS_OPEN_BY_FID)) {
368 * For open with IT_CREATE and for IT_CREATE cases allocate new
369 * fid and setup FLD for it.
371 op_data->op_fid3 = op_data->op_fid2;
372 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
377 CDEBUG(D_INODE, "OPEN_INTENT with fid1="DFID", fid2="DFID","
378 " name='%s' -> mds #%d\n", PFID(&op_data->op_fid1),
379 PFID(&op_data->op_fid2), op_data->op_name, tgt->ltd_idx);
381 rc = md_intent_lock(tgt->ltd_exp, op_data, it, reqp, cb_blocking,
386 * Nothing is found, do not access body->fid1 as it is zero and thus
389 if ((it->d.lustre.it_disposition & DISP_LOOKUP_NEG) &&
390 !(it->d.lustre.it_disposition & DISP_OPEN_CREATE) &&
391 !(it->d.lustre.it_disposition & DISP_OPEN_OPEN))
394 body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
398 /* Not cross-ref case, just get out of here. */
399 if (unlikely((body->valid & OBD_MD_MDS))) {
400 rc = lmv_intent_remote(exp, it, &op_data->op_fid1, reqp,
401 cb_blocking, extra_lock_flags);
405 body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
414 * Handler for: getattr, lookup and revalidate cases.
417 lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data,
418 struct lookup_intent *it, struct ptlrpc_request **reqp,
419 ldlm_blocking_callback cb_blocking,
420 __u64 extra_lock_flags)
422 struct obd_device *obd = exp->exp_obd;
423 struct lmv_obd *lmv = &obd->u.lmv;
424 struct lmv_tgt_desc *tgt = NULL;
425 struct mdt_body *body;
426 struct lmv_stripe_md *lsm = op_data->op_mea1;
430 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
432 RETURN(PTR_ERR(tgt));
434 if (!fid_is_sane(&op_data->op_fid2))
435 fid_zero(&op_data->op_fid2);
437 CDEBUG(D_INODE, "LOOKUP_INTENT with fid1="DFID", fid2="DFID
438 ", name='%s' -> mds #%d lsm=%p lsm_magic=%x\n",
439 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2),
440 op_data->op_name ? op_data->op_name : "<NULL>",
441 tgt->ltd_idx, lsm, lsm == NULL ? -1 : lsm->lsm_md_magic);
443 op_data->op_bias &= ~MDS_CROSS_REF;
445 rc = md_intent_lock(tgt->ltd_exp, op_data, it, reqp, cb_blocking,
451 /* If RPC happens, lsm information will be revalidated
452 * during update_inode process (see ll_update_lsm_md) */
453 if (op_data->op_mea2 != NULL) {
454 rc = lmv_revalidate_slaves(exp, NULL, op_data->op_mea2,
461 } else if (it_disposition(it, DISP_LOOKUP_NEG) && lsm != NULL &&
462 lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION) {
463 /* For migrating directory, if it can not find the child in
464 * the source directory(master stripe), try the targeting
465 * directory(stripe 1) */
466 tgt = lmv_find_target(lmv, &lsm->lsm_md_oinfo[1].lmo_fid);
468 RETURN(PTR_ERR(tgt));
470 ptlrpc_req_finished(*reqp);
471 it->d.lustre.it_data = NULL;
474 CDEBUG(D_INODE, "For migrating dir, try target dir "DFID"\n",
475 PFID(&lsm->lsm_md_oinfo[1].lmo_fid));
477 op_data->op_fid1 = lsm->lsm_md_oinfo[1].lmo_fid;
478 it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
479 rc = md_intent_lock(tgt->ltd_exp, op_data, it, reqp,
480 cb_blocking, extra_lock_flags);
483 * MDS has returned success. Probably name has been resolved in
484 * remote inode. Let's check this.
486 body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
490 /* Not cross-ref case, just get out of here. */
491 if (unlikely((body->valid & OBD_MD_MDS))) {
492 rc = lmv_intent_remote(exp, it, NULL, reqp, cb_blocking,
496 body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
504 int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
505 struct lookup_intent *it, struct ptlrpc_request **reqp,
506 ldlm_blocking_callback cb_blocking,
507 __u64 extra_lock_flags)
509 struct obd_device *obd = exp->exp_obd;
514 LASSERT(fid_is_sane(&op_data->op_fid1));
516 CDEBUG(D_INODE, "INTENT LOCK '%s' for '%*s' on "DFID"\n",
517 LL_IT2STR(it), op_data->op_namelen, op_data->op_name,
518 PFID(&op_data->op_fid1));
520 rc = lmv_check_connect(obd);
524 if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT))
525 rc = lmv_intent_lookup(exp, op_data, it, reqp, cb_blocking,
527 else if (it->it_op & IT_OPEN)
528 rc = lmv_intent_open(exp, op_data, it, reqp, cb_blocking,