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Merge tag 'mmc-v4.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
[mirror_ubuntu-bionic-kernel.git] / drivers / staging / lustre / lustre / llite / file.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * GPL HEADER START
4 *
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 only,
9 * as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License version 2 for more details (a copy is included
15 * in the LICENSE file that accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License
18 * version 2 along with this program; If not, see
19 * http://www.gnu.org/licenses/gpl-2.0.html
20 *
21 * GPL HEADER END
22 */
23 /*
24 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
25 * Use is subject to license terms.
26 *
27 * Copyright (c) 2011, 2015, Intel Corporation.
28 */
29 /*
30 * This file is part of Lustre, http://www.lustre.org/
31 * Lustre is a trademark of Sun Microsystems, Inc.
32 *
33 * lustre/llite/file.c
34 *
35 * Author: Peter Braam <braam@clusterfs.com>
36 * Author: Phil Schwan <phil@clusterfs.com>
37 * Author: Andreas Dilger <adilger@clusterfs.com>
38 */
39
40 #define DEBUG_SUBSYSTEM S_LLITE
41 #include <lustre_dlm.h>
42 #include <linux/pagemap.h>
43 #include <linux/file.h>
44 #include <linux/sched.h>
45 #include <linux/mount.h>
46 #include <uapi/linux/lustre/lustre_fiemap.h>
47 #include <uapi/linux/lustre/lustre_ioctl.h>
48 #include <lustre_swab.h>
49
50 #include <cl_object.h>
51 #include "llite_internal.h"
52
53 static int
54 ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg);
55
56 static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
57 bool *lease_broken);
58
59 static enum llioc_iter
60 ll_iocontrol_call(struct inode *inode, struct file *file,
61 unsigned int cmd, unsigned long arg, int *rcp);
62
63 static struct ll_file_data *ll_file_data_get(void)
64 {
65 struct ll_file_data *fd;
66
67 fd = kmem_cache_zalloc(ll_file_data_slab, GFP_NOFS);
68 if (!fd)
69 return NULL;
70 fd->fd_write_failed = false;
71 return fd;
72 }
73
74 static void ll_file_data_put(struct ll_file_data *fd)
75 {
76 if (fd)
77 kmem_cache_free(ll_file_data_slab, fd);
78 }
79
80 /**
81 * Packs all the attributes into @op_data for the CLOSE rpc.
82 */
83 static void ll_prepare_close(struct inode *inode, struct md_op_data *op_data,
84 struct obd_client_handle *och)
85 {
86 struct ll_inode_info *lli = ll_i2info(inode);
87
88 ll_prep_md_op_data(op_data, inode, NULL, NULL,
89 0, 0, LUSTRE_OPC_ANY, NULL);
90
91 op_data->op_attr.ia_mode = inode->i_mode;
92 op_data->op_attr.ia_atime = inode->i_atime;
93 op_data->op_attr.ia_mtime = inode->i_mtime;
94 op_data->op_attr.ia_ctime = inode->i_ctime;
95 op_data->op_attr.ia_size = i_size_read(inode);
96 op_data->op_attr.ia_valid |= ATTR_MODE | ATTR_ATIME | ATTR_ATIME_SET |
97 ATTR_MTIME | ATTR_MTIME_SET |
98 ATTR_CTIME | ATTR_CTIME_SET;
99 op_data->op_attr_blocks = inode->i_blocks;
100 op_data->op_attr_flags = ll_inode_to_ext_flags(inode->i_flags);
101 op_data->op_handle = och->och_fh;
102
103 /*
104 * For HSM: if inode data has been modified, pack it so that
105 * MDT can set data dirty flag in the archive.
106 */
107 if (och->och_flags & FMODE_WRITE &&
108 test_and_clear_bit(LLIF_DATA_MODIFIED, &lli->lli_flags))
109 op_data->op_bias |= MDS_DATA_MODIFIED;
110 }
111
112 /**
113 * Perform a close, possibly with a bias.
114 * The meaning of "data" depends on the value of "bias".
115 *
116 * If \a bias is MDS_HSM_RELEASE then \a data is a pointer to the data version.
117 * If \a bias is MDS_CLOSE_LAYOUT_SWAP then \a data is a pointer to the inode to
118 * swap layouts with.
119 */
120 static int ll_close_inode_openhandle(struct inode *inode,
121 struct obd_client_handle *och,
122 enum mds_op_bias bias,
123 void *data)
124 {
125 const struct ll_inode_info *lli = ll_i2info(inode);
126 struct obd_export *md_exp = ll_i2mdexp(inode);
127 struct md_op_data *op_data;
128 struct ptlrpc_request *req = NULL;
129 int rc;
130
131 if (!class_exp2obd(md_exp)) {
132 CERROR("%s: invalid MDC connection handle closing " DFID "\n",
133 ll_get_fsname(inode->i_sb, NULL, 0),
134 PFID(&lli->lli_fid));
135 rc = 0;
136 goto out;
137 }
138
139 op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
140 /*
141 * We leak openhandle and request here on error, but not much to be
142 * done in OOM case since app won't retry close on error either.
143 */
144 if (!op_data) {
145 rc = -ENOMEM;
146 goto out;
147 }
148
149 ll_prepare_close(inode, op_data, och);
150 switch (bias) {
151 case MDS_CLOSE_LAYOUT_SWAP:
152 LASSERT(data);
153 op_data->op_bias |= MDS_CLOSE_LAYOUT_SWAP;
154 op_data->op_data_version = 0;
155 op_data->op_lease_handle = och->och_lease_handle;
156 op_data->op_fid2 = *ll_inode2fid(data);
157 break;
158
159 case MDS_HSM_RELEASE:
160 LASSERT(data);
161 op_data->op_bias |= MDS_HSM_RELEASE;
162 op_data->op_data_version = *(__u64 *)data;
163 op_data->op_lease_handle = och->och_lease_handle;
164 op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
165 break;
166
167 default:
168 LASSERT(!data);
169 break;
170 }
171
172 rc = md_close(md_exp, op_data, och->och_mod, &req);
173 if (rc && rc != -EINTR) {
174 CERROR("%s: inode " DFID " mdc close failed: rc = %d\n",
175 md_exp->exp_obd->obd_name, PFID(&lli->lli_fid), rc);
176 }
177
178 if (op_data->op_bias & (MDS_HSM_RELEASE | MDS_CLOSE_LAYOUT_SWAP) &&
179 !rc) {
180 struct mdt_body *body;
181
182 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
183 if (!(body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED))
184 rc = -EBUSY;
185 }
186
187 ll_finish_md_op_data(op_data);
188
189 out:
190 md_clear_open_replay_data(md_exp, och);
191 och->och_fh.cookie = DEAD_HANDLE_MAGIC;
192 kfree(och);
193
194 ptlrpc_req_finished(req);
195 return rc;
196 }
197
198 int ll_md_real_close(struct inode *inode, fmode_t fmode)
199 {
200 struct ll_inode_info *lli = ll_i2info(inode);
201 struct obd_client_handle **och_p;
202 struct obd_client_handle *och;
203 __u64 *och_usecount;
204 int rc = 0;
205
206 if (fmode & FMODE_WRITE) {
207 och_p = &lli->lli_mds_write_och;
208 och_usecount = &lli->lli_open_fd_write_count;
209 } else if (fmode & FMODE_EXEC) {
210 och_p = &lli->lli_mds_exec_och;
211 och_usecount = &lli->lli_open_fd_exec_count;
212 } else {
213 LASSERT(fmode & FMODE_READ);
214 och_p = &lli->lli_mds_read_och;
215 och_usecount = &lli->lli_open_fd_read_count;
216 }
217
218 mutex_lock(&lli->lli_och_mutex);
219 if (*och_usecount > 0) {
220 /* There are still users of this handle, so skip
221 * freeing it.
222 */
223 mutex_unlock(&lli->lli_och_mutex);
224 return 0;
225 }
226
227 och = *och_p;
228 *och_p = NULL;
229 mutex_unlock(&lli->lli_och_mutex);
230
231 if (och) {
232 /* There might be a race and this handle may already
233 * be closed.
234 */
235 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
236 }
237
238 return rc;
239 }
240
241 static int ll_md_close(struct inode *inode, struct file *file)
242 {
243 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
244 struct ll_inode_info *lli = ll_i2info(inode);
245 int lockmode;
246 __u64 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
247 struct lustre_handle lockh;
248 union ldlm_policy_data policy = {
249 .l_inodebits = { MDS_INODELOCK_OPEN }
250 };
251 int rc = 0;
252
253 /* clear group lock, if present */
254 if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED))
255 ll_put_grouplock(inode, file, fd->fd_grouplock.lg_gid);
256
257 if (fd->fd_lease_och) {
258 bool lease_broken;
259
260 /* Usually the lease is not released when the
261 * application crashed, we need to release here.
262 */
263 rc = ll_lease_close(fd->fd_lease_och, inode, &lease_broken);
264 CDEBUG(rc ? D_ERROR : D_INODE,
265 "Clean up lease " DFID " %d/%d\n",
266 PFID(&lli->lli_fid), rc, lease_broken);
267
268 fd->fd_lease_och = NULL;
269 }
270
271 if (fd->fd_och) {
272 rc = ll_close_inode_openhandle(inode, fd->fd_och, 0, NULL);
273 fd->fd_och = NULL;
274 goto out;
275 }
276
277 /* Let's see if we have good enough OPEN lock on the file and if
278 * we can skip talking to MDS
279 */
280
281 mutex_lock(&lli->lli_och_mutex);
282 if (fd->fd_omode & FMODE_WRITE) {
283 lockmode = LCK_CW;
284 LASSERT(lli->lli_open_fd_write_count);
285 lli->lli_open_fd_write_count--;
286 } else if (fd->fd_omode & FMODE_EXEC) {
287 lockmode = LCK_PR;
288 LASSERT(lli->lli_open_fd_exec_count);
289 lli->lli_open_fd_exec_count--;
290 } else {
291 lockmode = LCK_CR;
292 LASSERT(lli->lli_open_fd_read_count);
293 lli->lli_open_fd_read_count--;
294 }
295 mutex_unlock(&lli->lli_och_mutex);
296
297 if (!md_lock_match(ll_i2mdexp(inode), flags, ll_inode2fid(inode),
298 LDLM_IBITS, &policy, lockmode, &lockh))
299 rc = ll_md_real_close(inode, fd->fd_omode);
300
301 out:
302 LUSTRE_FPRIVATE(file) = NULL;
303 ll_file_data_put(fd);
304
305 return rc;
306 }
307
308 /* While this returns an error code, fput() the caller does not, so we need
309 * to make every effort to clean up all of our state here. Also, applications
310 * rarely check close errors and even if an error is returned they will not
311 * re-try the close call.
312 */
313 int ll_file_release(struct inode *inode, struct file *file)
314 {
315 struct ll_file_data *fd;
316 struct ll_sb_info *sbi = ll_i2sbi(inode);
317 struct ll_inode_info *lli = ll_i2info(inode);
318 int rc;
319
320 CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p)\n",
321 PFID(ll_inode2fid(inode)), inode);
322
323 if (!is_root_inode(inode))
324 ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
325 fd = LUSTRE_FPRIVATE(file);
326 LASSERT(fd);
327
328 /* The last ref on @file, maybe not be the owner pid of statahead,
329 * because parent and child process can share the same file handle.
330 */
331 if (S_ISDIR(inode->i_mode) && lli->lli_opendir_key == fd)
332 ll_deauthorize_statahead(inode, fd);
333
334 if (is_root_inode(inode)) {
335 LUSTRE_FPRIVATE(file) = NULL;
336 ll_file_data_put(fd);
337 return 0;
338 }
339
340 if (!S_ISDIR(inode->i_mode)) {
341 if (lli->lli_clob)
342 lov_read_and_clear_async_rc(lli->lli_clob);
343 lli->lli_async_rc = 0;
344 }
345
346 rc = ll_md_close(inode, file);
347
348 if (CFS_FAIL_TIMEOUT_MS(OBD_FAIL_PTLRPC_DUMP_LOG, cfs_fail_val))
349 libcfs_debug_dumplog();
350
351 return rc;
352 }
353
354 static int ll_intent_file_open(struct dentry *de, void *lmm, int lmmsize,
355 struct lookup_intent *itp)
356 {
357 struct inode *inode = d_inode(de);
358 struct ll_sb_info *sbi = ll_i2sbi(inode);
359 struct dentry *parent = de->d_parent;
360 const char *name = NULL;
361 struct md_op_data *op_data;
362 struct ptlrpc_request *req = NULL;
363 int len = 0, rc;
364
365 LASSERT(parent);
366 LASSERT(itp->it_flags & MDS_OPEN_BY_FID);
367
368 /*
369 * if server supports open-by-fid, or file name is invalid, don't pack
370 * name in open request
371 */
372 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_OPEN_BY_FID) &&
373 lu_name_is_valid_2(de->d_name.name, de->d_name.len)) {
374 name = de->d_name.name;
375 len = de->d_name.len;
376 }
377
378 op_data = ll_prep_md_op_data(NULL, d_inode(parent), inode, name, len,
379 O_RDWR, LUSTRE_OPC_ANY, NULL);
380 if (IS_ERR(op_data))
381 return PTR_ERR(op_data);
382 op_data->op_data = lmm;
383 op_data->op_data_size = lmmsize;
384
385 rc = md_intent_lock(sbi->ll_md_exp, op_data, itp, &req,
386 &ll_md_blocking_ast, 0);
387 ll_finish_md_op_data(op_data);
388 if (rc == -ESTALE) {
389 /* reason for keep own exit path - don`t flood log
390 * with messages with -ESTALE errors.
391 */
392 if (!it_disposition(itp, DISP_OPEN_OPEN) ||
393 it_open_error(DISP_OPEN_OPEN, itp))
394 goto out;
395 ll_release_openhandle(inode, itp);
396 goto out;
397 }
398
399 if (it_disposition(itp, DISP_LOOKUP_NEG)) {
400 rc = -ENOENT;
401 goto out;
402 }
403
404 if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) {
405 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp);
406 CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc);
407 goto out;
408 }
409
410 rc = ll_prep_inode(&inode, req, NULL, itp);
411 if (!rc && itp->it_lock_mode)
412 ll_set_lock_data(sbi->ll_md_exp, inode, itp, NULL);
413
414 out:
415 ptlrpc_req_finished(req);
416 ll_intent_drop_lock(itp);
417
418 /*
419 * We did open by fid, but by the time we got to the server,
420 * the object disappeared. If this is a create, we cannot really
421 * tell the userspace that the file it was trying to create
422 * does not exist. Instead let's return -ESTALE, and the VFS will
423 * retry the create with LOOKUP_REVAL that we are going to catch
424 * in ll_revalidate_dentry() and use lookup then.
425 */
426 if (rc == -ENOENT && itp->it_op & IT_CREAT)
427 rc = -ESTALE;
428
429 return rc;
430 }
431
432 static int ll_och_fill(struct obd_export *md_exp, struct lookup_intent *it,
433 struct obd_client_handle *och)
434 {
435 struct mdt_body *body;
436
437 body = req_capsule_server_get(&it->it_request->rq_pill, &RMF_MDT_BODY);
438 och->och_fh = body->mbo_handle;
439 och->och_fid = body->mbo_fid1;
440 och->och_lease_handle.cookie = it->it_lock_handle;
441 och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
442 och->och_flags = it->it_flags;
443
444 return md_set_open_replay_data(md_exp, och, it);
445 }
446
447 static int ll_local_open(struct file *file, struct lookup_intent *it,
448 struct ll_file_data *fd, struct obd_client_handle *och)
449 {
450 struct inode *inode = file_inode(file);
451
452 LASSERT(!LUSTRE_FPRIVATE(file));
453
454 LASSERT(fd);
455
456 if (och) {
457 int rc;
458
459 rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och);
460 if (rc != 0)
461 return rc;
462 }
463
464 LUSTRE_FPRIVATE(file) = fd;
465 ll_readahead_init(inode, &fd->fd_ras);
466 fd->fd_omode = it->it_flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
467
468 /* ll_cl_context initialize */
469 rwlock_init(&fd->fd_lock);
470 INIT_LIST_HEAD(&fd->fd_lccs);
471
472 return 0;
473 }
474
475 /* Open a file, and (for the very first open) create objects on the OSTs at
476 * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object
477 * creation or open until ll_lov_setstripe() ioctl is called.
478 *
479 * If we already have the stripe MD locally then we don't request it in
480 * md_open(), by passing a lmm_size = 0.
481 *
482 * It is up to the application to ensure no other processes open this file
483 * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
484 * used. We might be able to avoid races of that sort by getting lli_open_sem
485 * before returning in the O_LOV_DELAY_CREATE case and dropping it here
486 * or in ll_file_release(), but I'm not sure that is desirable/necessary.
487 */
488 int ll_file_open(struct inode *inode, struct file *file)
489 {
490 struct ll_inode_info *lli = ll_i2info(inode);
491 struct lookup_intent *it, oit = { .it_op = IT_OPEN,
492 .it_flags = file->f_flags };
493 struct obd_client_handle **och_p = NULL;
494 __u64 *och_usecount = NULL;
495 struct ll_file_data *fd;
496 int rc = 0;
497
498 CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p), flags %o\n",
499 PFID(ll_inode2fid(inode)), inode, file->f_flags);
500
501 it = file->private_data; /* XXX: compat macro */
502 file->private_data = NULL; /* prevent ll_local_open assertion */
503
504 fd = ll_file_data_get();
505 if (!fd) {
506 rc = -ENOMEM;
507 goto out_openerr;
508 }
509
510 fd->fd_file = file;
511 if (S_ISDIR(inode->i_mode))
512 ll_authorize_statahead(inode, fd);
513
514 if (is_root_inode(inode)) {
515 LUSTRE_FPRIVATE(file) = fd;
516 return 0;
517 }
518
519 if (!it || !it->it_disposition) {
520 /* Convert f_flags into access mode. We cannot use file->f_mode,
521 * because everything but O_ACCMODE mask was stripped from
522 * there
523 */
524 if ((oit.it_flags + 1) & O_ACCMODE)
525 oit.it_flags++;
526 if (file->f_flags & O_TRUNC)
527 oit.it_flags |= FMODE_WRITE;
528
529 /* kernel only call f_op->open in dentry_open. filp_open calls
530 * dentry_open after call to open_namei that checks permissions.
531 * Only nfsd_open call dentry_open directly without checking
532 * permissions and because of that this code below is safe.
533 */
534 if (oit.it_flags & (FMODE_WRITE | FMODE_READ))
535 oit.it_flags |= MDS_OPEN_OWNEROVERRIDE;
536
537 /* We do not want O_EXCL here, presumably we opened the file
538 * already? XXX - NFS implications?
539 */
540 oit.it_flags &= ~O_EXCL;
541
542 /* bug20584, if "it_flags" contains O_CREAT, the file will be
543 * created if necessary, then "IT_CREAT" should be set to keep
544 * consistent with it
545 */
546 if (oit.it_flags & O_CREAT)
547 oit.it_op |= IT_CREAT;
548
549 it = &oit;
550 }
551
552 restart:
553 /* Let's see if we have file open on MDS already. */
554 if (it->it_flags & FMODE_WRITE) {
555 och_p = &lli->lli_mds_write_och;
556 och_usecount = &lli->lli_open_fd_write_count;
557 } else if (it->it_flags & FMODE_EXEC) {
558 och_p = &lli->lli_mds_exec_och;
559 och_usecount = &lli->lli_open_fd_exec_count;
560 } else {
561 och_p = &lli->lli_mds_read_och;
562 och_usecount = &lli->lli_open_fd_read_count;
563 }
564
565 mutex_lock(&lli->lli_och_mutex);
566 if (*och_p) { /* Open handle is present */
567 if (it_disposition(it, DISP_OPEN_OPEN)) {
568 /* Well, there's extra open request that we do not need,
569 * let's close it somehow. This will decref request.
570 */
571 rc = it_open_error(DISP_OPEN_OPEN, it);
572 if (rc) {
573 mutex_unlock(&lli->lli_och_mutex);
574 goto out_openerr;
575 }
576
577 ll_release_openhandle(inode, it);
578 }
579 (*och_usecount)++;
580
581 rc = ll_local_open(file, it, fd, NULL);
582 if (rc) {
583 (*och_usecount)--;
584 mutex_unlock(&lli->lli_och_mutex);
585 goto out_openerr;
586 }
587 } else {
588 LASSERT(*och_usecount == 0);
589 if (!it->it_disposition) {
590 /* We cannot just request lock handle now, new ELC code
591 * means that one of other OPEN locks for this file
592 * could be cancelled, and since blocking ast handler
593 * would attempt to grab och_mutex as well, that would
594 * result in a deadlock
595 */
596 mutex_unlock(&lli->lli_och_mutex);
597 /*
598 * Normally called under two situations:
599 * 1. NFS export.
600 * 2. revalidate with IT_OPEN (revalidate doesn't
601 * execute this intent any more).
602 *
603 * Always fetch MDS_OPEN_LOCK if this is not setstripe.
604 *
605 * Always specify MDS_OPEN_BY_FID because we don't want
606 * to get file with different fid.
607 */
608 it->it_flags |= MDS_OPEN_LOCK | MDS_OPEN_BY_FID;
609 rc = ll_intent_file_open(file->f_path.dentry,
610 NULL, 0, it);
611 if (rc)
612 goto out_openerr;
613
614 goto restart;
615 }
616 *och_p = kzalloc(sizeof(struct obd_client_handle), GFP_NOFS);
617 if (!*och_p) {
618 rc = -ENOMEM;
619 goto out_och_free;
620 }
621
622 (*och_usecount)++;
623
624 /* md_intent_lock() didn't get a request ref if there was an
625 * open error, so don't do cleanup on the request here
626 * (bug 3430)
627 */
628 /* XXX (green): Should not we bail out on any error here, not
629 * just open error?
630 */
631 rc = it_open_error(DISP_OPEN_OPEN, it);
632 if (rc)
633 goto out_och_free;
634
635 LASSERTF(it_disposition(it, DISP_ENQ_OPEN_REF),
636 "inode %p: disposition %x, status %d\n", inode,
637 it_disposition(it, ~0), it->it_status);
638
639 rc = ll_local_open(file, it, fd, *och_p);
640 if (rc)
641 goto out_och_free;
642 }
643 mutex_unlock(&lli->lli_och_mutex);
644 fd = NULL;
645
646 /* Must do this outside lli_och_mutex lock to prevent deadlock where
647 * different kind of OPEN lock for this same inode gets cancelled
648 * by ldlm_cancel_lru
649 */
650 if (!S_ISREG(inode->i_mode))
651 goto out_och_free;
652
653 cl_lov_delay_create_clear(&file->f_flags);
654 goto out_och_free;
655
656 out_och_free:
657 if (rc) {
658 if (och_p && *och_p) {
659 kfree(*och_p);
660 *och_p = NULL;
661 (*och_usecount)--;
662 }
663 mutex_unlock(&lli->lli_och_mutex);
664
665 out_openerr:
666 if (lli->lli_opendir_key == fd)
667 ll_deauthorize_statahead(inode, fd);
668 if (fd)
669 ll_file_data_put(fd);
670 } else {
671 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN, 1);
672 }
673
674 if (it && it_disposition(it, DISP_ENQ_OPEN_REF)) {
675 ptlrpc_req_finished(it->it_request);
676 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
677 }
678
679 return rc;
680 }
681
682 static int ll_md_blocking_lease_ast(struct ldlm_lock *lock,
683 struct ldlm_lock_desc *desc,
684 void *data, int flag)
685 {
686 int rc;
687 struct lustre_handle lockh;
688
689 switch (flag) {
690 case LDLM_CB_BLOCKING:
691 ldlm_lock2handle(lock, &lockh);
692 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
693 if (rc < 0) {
694 CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
695 return rc;
696 }
697 break;
698 case LDLM_CB_CANCELING:
699 /* do nothing */
700 break;
701 }
702 return 0;
703 }
704
705 /**
706 * Acquire a lease and open the file.
707 */
708 static struct obd_client_handle *
709 ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
710 __u64 open_flags)
711 {
712 struct lookup_intent it = { .it_op = IT_OPEN };
713 struct ll_sb_info *sbi = ll_i2sbi(inode);
714 struct md_op_data *op_data;
715 struct ptlrpc_request *req = NULL;
716 struct lustre_handle old_handle = { 0 };
717 struct obd_client_handle *och = NULL;
718 int rc;
719 int rc2;
720
721 if (fmode != FMODE_WRITE && fmode != FMODE_READ)
722 return ERR_PTR(-EINVAL);
723
724 if (file) {
725 struct ll_inode_info *lli = ll_i2info(inode);
726 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
727 struct obd_client_handle **och_p;
728 __u64 *och_usecount;
729
730 if (!(fmode & file->f_mode) || (file->f_mode & FMODE_EXEC))
731 return ERR_PTR(-EPERM);
732
733 /* Get the openhandle of the file */
734 rc = -EBUSY;
735 mutex_lock(&lli->lli_och_mutex);
736 if (fd->fd_lease_och) {
737 mutex_unlock(&lli->lli_och_mutex);
738 return ERR_PTR(rc);
739 }
740
741 if (!fd->fd_och) {
742 if (file->f_mode & FMODE_WRITE) {
743 LASSERT(lli->lli_mds_write_och);
744 och_p = &lli->lli_mds_write_och;
745 och_usecount = &lli->lli_open_fd_write_count;
746 } else {
747 LASSERT(lli->lli_mds_read_och);
748 och_p = &lli->lli_mds_read_och;
749 och_usecount = &lli->lli_open_fd_read_count;
750 }
751 if (*och_usecount == 1) {
752 fd->fd_och = *och_p;
753 *och_p = NULL;
754 *och_usecount = 0;
755 rc = 0;
756 }
757 }
758 mutex_unlock(&lli->lli_och_mutex);
759 if (rc < 0) /* more than 1 opener */
760 return ERR_PTR(rc);
761
762 LASSERT(fd->fd_och);
763 old_handle = fd->fd_och->och_fh;
764 }
765
766 och = kzalloc(sizeof(*och), GFP_NOFS);
767 if (!och)
768 return ERR_PTR(-ENOMEM);
769
770 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
771 LUSTRE_OPC_ANY, NULL);
772 if (IS_ERR(op_data)) {
773 rc = PTR_ERR(op_data);
774 goto out;
775 }
776
777 /* To tell the MDT this openhandle is from the same owner */
778 op_data->op_handle = old_handle;
779
780 it.it_flags = fmode | open_flags;
781 it.it_flags |= MDS_OPEN_LOCK | MDS_OPEN_BY_FID | MDS_OPEN_LEASE;
782 rc = md_intent_lock(sbi->ll_md_exp, op_data, &it, &req,
783 &ll_md_blocking_lease_ast,
784 /* LDLM_FL_NO_LRU: To not put the lease lock into LRU list, otherwise
785 * it can be cancelled which may mislead applications that the lease is
786 * broken;
787 * LDLM_FL_EXCL: Set this flag so that it won't be matched by normal
788 * open in ll_md_blocking_ast(). Otherwise as ll_md_blocking_lease_ast
789 * doesn't deal with openhandle, so normal openhandle will be leaked.
790 */
791 LDLM_FL_NO_LRU | LDLM_FL_EXCL);
792 ll_finish_md_op_data(op_data);
793 ptlrpc_req_finished(req);
794 if (rc < 0)
795 goto out_release_it;
796
797 if (it_disposition(&it, DISP_LOOKUP_NEG)) {
798 rc = -ENOENT;
799 goto out_release_it;
800 }
801
802 rc = it_open_error(DISP_OPEN_OPEN, &it);
803 if (rc)
804 goto out_release_it;
805
806 LASSERT(it_disposition(&it, DISP_ENQ_OPEN_REF));
807 ll_och_fill(sbi->ll_md_exp, &it, och);
808
809 if (!it_disposition(&it, DISP_OPEN_LEASE)) /* old server? */ {
810 rc = -EOPNOTSUPP;
811 goto out_close;
812 }
813
814 /* already get lease, handle lease lock */
815 ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL);
816 if (it.it_lock_mode == 0 ||
817 it.it_lock_bits != MDS_INODELOCK_OPEN) {
818 /* open lock must return for lease */
819 CERROR(DFID "lease granted but no open lock, %d/%llu.\n",
820 PFID(ll_inode2fid(inode)), it.it_lock_mode,
821 it.it_lock_bits);
822 rc = -EPROTO;
823 goto out_close;
824 }
825
826 ll_intent_release(&it);
827 return och;
828
829 out_close:
830 /* Cancel open lock */
831 if (it.it_lock_mode != 0) {
832 ldlm_lock_decref_and_cancel(&och->och_lease_handle,
833 it.it_lock_mode);
834 it.it_lock_mode = 0;
835 och->och_lease_handle.cookie = 0ULL;
836 }
837 rc2 = ll_close_inode_openhandle(inode, och, 0, NULL);
838 if (rc2 < 0)
839 CERROR("%s: error closing file " DFID ": %d\n",
840 ll_get_fsname(inode->i_sb, NULL, 0),
841 PFID(&ll_i2info(inode)->lli_fid), rc2);
842 och = NULL; /* och has been freed in ll_close_inode_openhandle() */
843 out_release_it:
844 ll_intent_release(&it);
845 out:
846 kfree(och);
847 return ERR_PTR(rc);
848 }
849
850 /**
851 * Check whether a layout swap can be done between two inodes.
852 *
853 * \param[in] inode1 First inode to check
854 * \param[in] inode2 Second inode to check
855 *
856 * \retval 0 on success, layout swap can be performed between both inodes
857 * \retval negative error code if requirements are not met
858 */
859 static int ll_check_swap_layouts_validity(struct inode *inode1,
860 struct inode *inode2)
861 {
862 if (!S_ISREG(inode1->i_mode) || !S_ISREG(inode2->i_mode))
863 return -EINVAL;
864
865 if (inode_permission(inode1, MAY_WRITE) ||
866 inode_permission(inode2, MAY_WRITE))
867 return -EPERM;
868
869 if (inode1->i_sb != inode2->i_sb)
870 return -EXDEV;
871
872 return 0;
873 }
874
875 static int ll_swap_layouts_close(struct obd_client_handle *och,
876 struct inode *inode, struct inode *inode2)
877 {
878 const struct lu_fid *fid1 = ll_inode2fid(inode);
879 const struct lu_fid *fid2;
880 int rc;
881
882 CDEBUG(D_INODE, "%s: biased close of file " DFID "\n",
883 ll_get_fsname(inode->i_sb, NULL, 0), PFID(fid1));
884
885 rc = ll_check_swap_layouts_validity(inode, inode2);
886 if (rc < 0)
887 goto out_free_och;
888
889 /* We now know that inode2 is a lustre inode */
890 fid2 = ll_inode2fid(inode2);
891
892 rc = lu_fid_cmp(fid1, fid2);
893 if (!rc) {
894 rc = -EINVAL;
895 goto out_free_och;
896 }
897
898 /*
899 * Close the file and swap layouts between inode & inode2.
900 * NB: lease lock handle is released in mdc_close_layout_swap_pack()
901 * because we still need it to pack l_remote_handle to MDT.
902 */
903 rc = ll_close_inode_openhandle(inode, och, MDS_CLOSE_LAYOUT_SWAP,
904 inode2);
905
906 och = NULL; /* freed in ll_close_inode_openhandle() */
907
908 out_free_och:
909 kfree(och);
910 return rc;
911 }
912
913 /**
914 * Release lease and close the file.
915 * It will check if the lease has ever broken.
916 */
917 static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
918 bool *lease_broken)
919 {
920 struct ldlm_lock *lock;
921 bool cancelled = true;
922
923 lock = ldlm_handle2lock(&och->och_lease_handle);
924 if (lock) {
925 lock_res_and_lock(lock);
926 cancelled = ldlm_is_cancel(lock);
927 unlock_res_and_lock(lock);
928 LDLM_LOCK_PUT(lock);
929 }
930
931 CDEBUG(D_INODE, "lease for " DFID " broken? %d\n",
932 PFID(&ll_i2info(inode)->lli_fid), cancelled);
933
934 if (!cancelled)
935 ldlm_cli_cancel(&och->och_lease_handle, 0);
936 if (lease_broken)
937 *lease_broken = cancelled;
938
939 return ll_close_inode_openhandle(inode, och, 0, NULL);
940 }
941
942 int ll_merge_attr(const struct lu_env *env, struct inode *inode)
943 {
944 struct ll_inode_info *lli = ll_i2info(inode);
945 struct cl_object *obj = lli->lli_clob;
946 struct cl_attr *attr = vvp_env_thread_attr(env);
947 s64 atime;
948 s64 mtime;
949 s64 ctime;
950 int rc = 0;
951
952 ll_inode_size_lock(inode);
953
954 /* merge timestamps the most recently obtained from mds with
955 * timestamps obtained from osts
956 */
957 LTIME_S(inode->i_atime) = lli->lli_atime;
958 LTIME_S(inode->i_mtime) = lli->lli_mtime;
959 LTIME_S(inode->i_ctime) = lli->lli_ctime;
960
961 mtime = LTIME_S(inode->i_mtime);
962 atime = LTIME_S(inode->i_atime);
963 ctime = LTIME_S(inode->i_ctime);
964
965 cl_object_attr_lock(obj);
966 rc = cl_object_attr_get(env, obj, attr);
967 cl_object_attr_unlock(obj);
968
969 if (rc != 0)
970 goto out_size_unlock;
971
972 if (atime < attr->cat_atime)
973 atime = attr->cat_atime;
974
975 if (ctime < attr->cat_ctime)
976 ctime = attr->cat_ctime;
977
978 if (mtime < attr->cat_mtime)
979 mtime = attr->cat_mtime;
980
981 CDEBUG(D_VFSTRACE, DFID " updating i_size %llu\n",
982 PFID(&lli->lli_fid), attr->cat_size);
983
984 i_size_write(inode, attr->cat_size);
985
986 inode->i_blocks = attr->cat_blocks;
987
988 LTIME_S(inode->i_mtime) = mtime;
989 LTIME_S(inode->i_atime) = atime;
990 LTIME_S(inode->i_ctime) = ctime;
991
992 out_size_unlock:
993 ll_inode_size_unlock(inode);
994
995 return rc;
996 }
997
998 static bool file_is_noatime(const struct file *file)
999 {
1000 const struct vfsmount *mnt = file->f_path.mnt;
1001 const struct inode *inode = file_inode(file);
1002
1003 /* Adapted from file_accessed() and touch_atime().*/
1004 if (file->f_flags & O_NOATIME)
1005 return true;
1006
1007 if (inode->i_flags & S_NOATIME)
1008 return true;
1009
1010 if (IS_NOATIME(inode))
1011 return true;
1012
1013 if (mnt->mnt_flags & (MNT_NOATIME | MNT_READONLY))
1014 return true;
1015
1016 if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
1017 return true;
1018
1019 if ((inode->i_sb->s_flags & SB_NODIRATIME) && S_ISDIR(inode->i_mode))
1020 return true;
1021
1022 return false;
1023 }
1024
1025 static void ll_io_init(struct cl_io *io, const struct file *file, int write)
1026 {
1027 struct inode *inode = file_inode(file);
1028
1029 io->u.ci_rw.crw_nonblock = file->f_flags & O_NONBLOCK;
1030 if (write) {
1031 io->u.ci_wr.wr_append = !!(file->f_flags & O_APPEND);
1032 io->u.ci_wr.wr_sync = file->f_flags & O_SYNC ||
1033 file->f_flags & O_DIRECT ||
1034 IS_SYNC(inode);
1035 }
1036 io->ci_obj = ll_i2info(inode)->lli_clob;
1037 io->ci_lockreq = CILR_MAYBE;
1038 if (ll_file_nolock(file)) {
1039 io->ci_lockreq = CILR_NEVER;
1040 io->ci_no_srvlock = 1;
1041 } else if (file->f_flags & O_APPEND) {
1042 io->ci_lockreq = CILR_MANDATORY;
1043 }
1044
1045 io->ci_noatime = file_is_noatime(file);
1046 }
1047
1048 static ssize_t
1049 ll_file_io_generic(const struct lu_env *env, struct vvp_io_args *args,
1050 struct file *file, enum cl_io_type iot,
1051 loff_t *ppos, size_t count)
1052 {
1053 struct ll_inode_info *lli = ll_i2info(file_inode(file));
1054 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1055 struct vvp_io *vio = vvp_env_io(env);
1056 struct range_lock range;
1057 struct cl_io *io;
1058 ssize_t result = 0;
1059 int rc = 0;
1060
1061 CDEBUG(D_VFSTRACE, "file: %pD, type: %d ppos: %llu, count: %zu\n",
1062 file, iot, *ppos, count);
1063
1064 restart:
1065 io = vvp_env_thread_io(env);
1066 ll_io_init(io, file, iot == CIT_WRITE);
1067
1068 if (cl_io_rw_init(env, io, iot, *ppos, count) == 0) {
1069 struct vvp_io *vio = vvp_env_io(env);
1070 bool range_locked = false;
1071
1072 if (file->f_flags & O_APPEND)
1073 range_lock_init(&range, 0, LUSTRE_EOF);
1074 else
1075 range_lock_init(&range, *ppos, *ppos + count - 1);
1076
1077 vio->vui_fd = LUSTRE_FPRIVATE(file);
1078 vio->vui_iter = args->u.normal.via_iter;
1079 vio->vui_iocb = args->u.normal.via_iocb;
1080 /*
1081 * Direct IO reads must also take range lock,
1082 * or multiple reads will try to work on the same pages
1083 * See LU-6227 for details.
1084 */
1085 if (((iot == CIT_WRITE) ||
1086 (iot == CIT_READ && (file->f_flags & O_DIRECT))) &&
1087 !(vio->vui_fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
1088 CDEBUG(D_VFSTRACE, "Range lock [%llu, %llu]\n",
1089 range.rl_node.in_extent.start,
1090 range.rl_node.in_extent.end);
1091 rc = range_lock(&lli->lli_write_tree, &range);
1092 if (rc < 0)
1093 goto out;
1094
1095 range_locked = true;
1096 }
1097 ll_cl_add(file, env, io);
1098 rc = cl_io_loop(env, io);
1099 ll_cl_remove(file, env);
1100 if (range_locked) {
1101 CDEBUG(D_VFSTRACE, "Range unlock [%llu, %llu]\n",
1102 range.rl_node.in_extent.start,
1103 range.rl_node.in_extent.end);
1104 range_unlock(&lli->lli_write_tree, &range);
1105 }
1106 } else {
1107 /* cl_io_rw_init() handled IO */
1108 rc = io->ci_result;
1109 }
1110
1111 if (io->ci_nob > 0) {
1112 result = io->ci_nob;
1113 count -= io->ci_nob;
1114 *ppos = io->u.ci_wr.wr.crw_pos;
1115
1116 /* prepare IO restart */
1117 if (count > 0)
1118 args->u.normal.via_iter = vio->vui_iter;
1119 }
1120 out:
1121 cl_io_fini(env, io);
1122
1123 if ((!rc || rc == -ENODATA) && count > 0 && io->ci_need_restart) {
1124 CDEBUG(D_VFSTRACE,
1125 "%s: restart %s from %lld, count:%zu, result: %zd\n",
1126 file_dentry(file)->d_name.name,
1127 iot == CIT_READ ? "read" : "write",
1128 *ppos, count, result);
1129 goto restart;
1130 }
1131
1132 if (iot == CIT_READ) {
1133 if (result >= 0)
1134 ll_stats_ops_tally(ll_i2sbi(file_inode(file)),
1135 LPROC_LL_READ_BYTES, result);
1136 } else if (iot == CIT_WRITE) {
1137 if (result >= 0) {
1138 ll_stats_ops_tally(ll_i2sbi(file_inode(file)),
1139 LPROC_LL_WRITE_BYTES, result);
1140 fd->fd_write_failed = false;
1141 } else if (!result && !rc) {
1142 rc = io->ci_result;
1143 if (rc < 0)
1144 fd->fd_write_failed = true;
1145 else
1146 fd->fd_write_failed = false;
1147 } else if (rc != -ERESTARTSYS) {
1148 fd->fd_write_failed = true;
1149 }
1150 }
1151 CDEBUG(D_VFSTRACE, "iot: %d, result: %zd\n", iot, result);
1152
1153 return result > 0 ? result : rc;
1154 }
1155
1156 static ssize_t ll_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
1157 {
1158 struct lu_env *env;
1159 struct vvp_io_args *args;
1160 ssize_t result;
1161 u16 refcheck;
1162
1163 env = cl_env_get(&refcheck);
1164 if (IS_ERR(env))
1165 return PTR_ERR(env);
1166
1167 args = ll_env_args(env);
1168 args->u.normal.via_iter = to;
1169 args->u.normal.via_iocb = iocb;
1170
1171 result = ll_file_io_generic(env, args, iocb->ki_filp, CIT_READ,
1172 &iocb->ki_pos, iov_iter_count(to));
1173 cl_env_put(env, &refcheck);
1174 return result;
1175 }
1176
1177 /*
1178 * Write to a file (through the page cache).
1179 */
1180 static ssize_t ll_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
1181 {
1182 struct lu_env *env;
1183 struct vvp_io_args *args;
1184 ssize_t result;
1185 u16 refcheck;
1186
1187 env = cl_env_get(&refcheck);
1188 if (IS_ERR(env))
1189 return PTR_ERR(env);
1190
1191 args = ll_env_args(env);
1192 args->u.normal.via_iter = from;
1193 args->u.normal.via_iocb = iocb;
1194
1195 result = ll_file_io_generic(env, args, iocb->ki_filp, CIT_WRITE,
1196 &iocb->ki_pos, iov_iter_count(from));
1197 cl_env_put(env, &refcheck);
1198 return result;
1199 }
1200
1201 int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry,
1202 __u64 flags, struct lov_user_md *lum,
1203 int lum_size)
1204 {
1205 struct lookup_intent oit = {
1206 .it_op = IT_OPEN,
1207 .it_flags = flags | MDS_OPEN_BY_FID,
1208 };
1209 int rc = 0;
1210
1211 ll_inode_size_lock(inode);
1212 rc = ll_intent_file_open(dentry, lum, lum_size, &oit);
1213 if (rc < 0)
1214 goto out_unlock;
1215
1216 ll_release_openhandle(inode, &oit);
1217
1218 out_unlock:
1219 ll_inode_size_unlock(inode);
1220 ll_intent_release(&oit);
1221 return rc;
1222 }
1223
1224 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
1225 struct lov_mds_md **lmmp, int *lmm_size,
1226 struct ptlrpc_request **request)
1227 {
1228 struct ll_sb_info *sbi = ll_i2sbi(inode);
1229 struct mdt_body *body;
1230 struct lov_mds_md *lmm = NULL;
1231 struct ptlrpc_request *req = NULL;
1232 struct md_op_data *op_data;
1233 int rc, lmmsize;
1234
1235 rc = ll_get_default_mdsize(sbi, &lmmsize);
1236 if (rc)
1237 return rc;
1238
1239 op_data = ll_prep_md_op_data(NULL, inode, NULL, filename,
1240 strlen(filename), lmmsize,
1241 LUSTRE_OPC_ANY, NULL);
1242 if (IS_ERR(op_data))
1243 return PTR_ERR(op_data);
1244
1245 op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
1246 rc = md_getattr_name(sbi->ll_md_exp, op_data, &req);
1247 ll_finish_md_op_data(op_data);
1248 if (rc < 0) {
1249 CDEBUG(D_INFO, "md_getattr_name failed on %s: rc %d\n",
1250 filename, rc);
1251 goto out;
1252 }
1253
1254 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1255
1256 lmmsize = body->mbo_eadatasize;
1257
1258 if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
1259 lmmsize == 0) {
1260 rc = -ENODATA;
1261 goto out;
1262 }
1263
1264 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, lmmsize);
1265
1266 if ((lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V1)) &&
1267 (lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V3))) {
1268 rc = -EPROTO;
1269 goto out;
1270 }
1271
1272 /*
1273 * This is coming from the MDS, so is probably in
1274 * little endian. We convert it to host endian before
1275 * passing it to userspace.
1276 */
1277 if (cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) {
1278 int stripe_count;
1279
1280 stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
1281 if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
1282 stripe_count = 0;
1283
1284 /* if function called for directory - we should
1285 * avoid swab not existent lsm objects
1286 */
1287 if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V1)) {
1288 lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
1289 if (S_ISREG(body->mbo_mode))
1290 lustre_swab_lov_user_md_objects(
1291 ((struct lov_user_md_v1 *)lmm)->lmm_objects,
1292 stripe_count);
1293 } else if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V3)) {
1294 lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
1295 if (S_ISREG(body->mbo_mode))
1296 lustre_swab_lov_user_md_objects(
1297 ((struct lov_user_md_v3 *)lmm)->lmm_objects,
1298 stripe_count);
1299 }
1300 }
1301
1302 out:
1303 *lmmp = lmm;
1304 *lmm_size = lmmsize;
1305 *request = req;
1306 return rc;
1307 }
1308
1309 static int ll_lov_setea(struct inode *inode, struct file *file,
1310 unsigned long arg)
1311 {
1312 __u64 flags = MDS_OPEN_HAS_OBJS | FMODE_WRITE;
1313 struct lov_user_md *lump;
1314 int lum_size = sizeof(struct lov_user_md) +
1315 sizeof(struct lov_user_ost_data);
1316 int rc;
1317
1318 if (!capable(CFS_CAP_SYS_ADMIN))
1319 return -EPERM;
1320
1321 lump = libcfs_kvzalloc(lum_size, GFP_NOFS);
1322 if (!lump)
1323 return -ENOMEM;
1324
1325 if (copy_from_user(lump, (struct lov_user_md __user *)arg, lum_size)) {
1326 kvfree(lump);
1327 return -EFAULT;
1328 }
1329
1330 rc = ll_lov_setstripe_ea_info(inode, file->f_path.dentry, flags, lump,
1331 lum_size);
1332 cl_lov_delay_create_clear(&file->f_flags);
1333
1334 kvfree(lump);
1335 return rc;
1336 }
1337
1338 static int ll_file_getstripe(struct inode *inode,
1339 struct lov_user_md __user *lum)
1340 {
1341 struct lu_env *env;
1342 u16 refcheck;
1343 int rc;
1344
1345 env = cl_env_get(&refcheck);
1346 if (IS_ERR(env))
1347 return PTR_ERR(env);
1348
1349 rc = cl_object_getstripe(env, ll_i2info(inode)->lli_clob, lum);
1350 cl_env_put(env, &refcheck);
1351 return rc;
1352 }
1353
1354 static int ll_lov_setstripe(struct inode *inode, struct file *file,
1355 unsigned long arg)
1356 {
1357 struct lov_user_md __user *lum = (struct lov_user_md __user *)arg;
1358 struct lov_user_md *klum;
1359 int lum_size, rc;
1360 __u64 flags = FMODE_WRITE;
1361
1362 rc = ll_copy_user_md(lum, &klum);
1363 if (rc < 0)
1364 return rc;
1365
1366 lum_size = rc;
1367 rc = ll_lov_setstripe_ea_info(inode, file->f_path.dentry, flags, klum,
1368 lum_size);
1369 cl_lov_delay_create_clear(&file->f_flags);
1370 if (rc == 0) {
1371 __u32 gen;
1372
1373 put_user(0, &lum->lmm_stripe_count);
1374
1375 ll_layout_refresh(inode, &gen);
1376 rc = ll_file_getstripe(inode, (struct lov_user_md __user *)arg);
1377 }
1378
1379 kfree(klum);
1380 return rc;
1381 }
1382
1383 static int
1384 ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg)
1385 {
1386 struct ll_inode_info *lli = ll_i2info(inode);
1387 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1388 struct ll_grouplock grouplock;
1389 int rc;
1390
1391 if (arg == 0) {
1392 CWARN("group id for group lock must not be 0\n");
1393 return -EINVAL;
1394 }
1395
1396 if (ll_file_nolock(file))
1397 return -EOPNOTSUPP;
1398
1399 spin_lock(&lli->lli_lock);
1400 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
1401 CWARN("group lock already existed with gid %lu\n",
1402 fd->fd_grouplock.lg_gid);
1403 spin_unlock(&lli->lli_lock);
1404 return -EINVAL;
1405 }
1406 LASSERT(!fd->fd_grouplock.lg_lock);
1407 spin_unlock(&lli->lli_lock);
1408
1409 rc = cl_get_grouplock(ll_i2info(inode)->lli_clob,
1410 arg, (file->f_flags & O_NONBLOCK), &grouplock);
1411 if (rc)
1412 return rc;
1413
1414 spin_lock(&lli->lli_lock);
1415 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
1416 spin_unlock(&lli->lli_lock);
1417 CERROR("another thread just won the race\n");
1418 cl_put_grouplock(&grouplock);
1419 return -EINVAL;
1420 }
1421
1422 fd->fd_flags |= LL_FILE_GROUP_LOCKED;
1423 fd->fd_grouplock = grouplock;
1424 spin_unlock(&lli->lli_lock);
1425
1426 CDEBUG(D_INFO, "group lock %lu obtained\n", arg);
1427 return 0;
1428 }
1429
1430 static int ll_put_grouplock(struct inode *inode, struct file *file,
1431 unsigned long arg)
1432 {
1433 struct ll_inode_info *lli = ll_i2info(inode);
1434 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1435 struct ll_grouplock grouplock;
1436
1437 spin_lock(&lli->lli_lock);
1438 if (!(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
1439 spin_unlock(&lli->lli_lock);
1440 CWARN("no group lock held\n");
1441 return -EINVAL;
1442 }
1443 LASSERT(fd->fd_grouplock.lg_lock);
1444
1445 if (fd->fd_grouplock.lg_gid != arg) {
1446 CWARN("group lock %lu doesn't match current id %lu\n",
1447 arg, fd->fd_grouplock.lg_gid);
1448 spin_unlock(&lli->lli_lock);
1449 return -EINVAL;
1450 }
1451
1452 grouplock = fd->fd_grouplock;
1453 memset(&fd->fd_grouplock, 0, sizeof(fd->fd_grouplock));
1454 fd->fd_flags &= ~LL_FILE_GROUP_LOCKED;
1455 spin_unlock(&lli->lli_lock);
1456
1457 cl_put_grouplock(&grouplock);
1458 CDEBUG(D_INFO, "group lock %lu released\n", arg);
1459 return 0;
1460 }
1461
1462 /**
1463 * Close inode open handle
1464 *
1465 * \param inode [in] inode in question
1466 * \param it [in,out] intent which contains open info and result
1467 *
1468 * \retval 0 success
1469 * \retval <0 failure
1470 */
1471 int ll_release_openhandle(struct inode *inode, struct lookup_intent *it)
1472 {
1473 struct obd_client_handle *och;
1474 int rc;
1475
1476 LASSERT(inode);
1477
1478 /* Root ? Do nothing. */
1479 if (is_root_inode(inode))
1480 return 0;
1481
1482 /* No open handle to close? Move away */
1483 if (!it_disposition(it, DISP_OPEN_OPEN))
1484 return 0;
1485
1486 LASSERT(it_open_error(DISP_OPEN_OPEN, it) == 0);
1487
1488 och = kzalloc(sizeof(*och), GFP_NOFS);
1489 if (!och) {
1490 rc = -ENOMEM;
1491 goto out;
1492 }
1493
1494 ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och);
1495
1496 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
1497 out:
1498 /* this one is in place of ll_file_open */
1499 if (it_disposition(it, DISP_ENQ_OPEN_REF)) {
1500 ptlrpc_req_finished(it->it_request);
1501 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
1502 }
1503 return rc;
1504 }
1505
1506 /**
1507 * Get size for inode for which FIEMAP mapping is requested.
1508 * Make the FIEMAP get_info call and returns the result.
1509 *
1510 * \param fiemap kernel buffer to hold extens
1511 * \param num_bytes kernel buffer size
1512 */
1513 static int ll_do_fiemap(struct inode *inode, struct fiemap *fiemap,
1514 size_t num_bytes)
1515 {
1516 struct ll_fiemap_info_key fmkey = { .lfik_name = KEY_FIEMAP, };
1517 struct lu_env *env;
1518 u16 refcheck;
1519 int rc = 0;
1520
1521 /* Checks for fiemap flags */
1522 if (fiemap->fm_flags & ~LUSTRE_FIEMAP_FLAGS_COMPAT) {
1523 fiemap->fm_flags &= ~LUSTRE_FIEMAP_FLAGS_COMPAT;
1524 return -EBADR;
1525 }
1526
1527 /* Check for FIEMAP_FLAG_SYNC */
1528 if (fiemap->fm_flags & FIEMAP_FLAG_SYNC) {
1529 rc = filemap_fdatawrite(inode->i_mapping);
1530 if (rc)
1531 return rc;
1532 }
1533
1534 env = cl_env_get(&refcheck);
1535 if (IS_ERR(env))
1536 return PTR_ERR(env);
1537
1538 if (i_size_read(inode) == 0) {
1539 rc = ll_glimpse_size(inode);
1540 if (rc)
1541 goto out;
1542 }
1543
1544 fmkey.lfik_oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1545 obdo_from_inode(&fmkey.lfik_oa, inode, OBD_MD_FLSIZE);
1546 obdo_set_parent_fid(&fmkey.lfik_oa, &ll_i2info(inode)->lli_fid);
1547
1548 /* If filesize is 0, then there would be no objects for mapping */
1549 if (fmkey.lfik_oa.o_size == 0) {
1550 fiemap->fm_mapped_extents = 0;
1551 rc = 0;
1552 goto out;
1553 }
1554
1555 memcpy(&fmkey.lfik_fiemap, fiemap, sizeof(*fiemap));
1556
1557 rc = cl_object_fiemap(env, ll_i2info(inode)->lli_clob,
1558 &fmkey, fiemap, &num_bytes);
1559 out:
1560 cl_env_put(env, &refcheck);
1561 return rc;
1562 }
1563
1564 int ll_fid2path(struct inode *inode, void __user *arg)
1565 {
1566 struct obd_export *exp = ll_i2mdexp(inode);
1567 const struct getinfo_fid2path __user *gfin = arg;
1568 struct getinfo_fid2path *gfout;
1569 u32 pathlen;
1570 size_t outsize;
1571 int rc;
1572
1573 if (!capable(CFS_CAP_DAC_READ_SEARCH) &&
1574 !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
1575 return -EPERM;
1576
1577 /* Only need to get the buflen */
1578 if (get_user(pathlen, &gfin->gf_pathlen))
1579 return -EFAULT;
1580
1581 if (pathlen > PATH_MAX)
1582 return -EINVAL;
1583
1584 outsize = sizeof(*gfout) + pathlen;
1585
1586 gfout = kzalloc(outsize, GFP_NOFS);
1587 if (!gfout)
1588 return -ENOMEM;
1589
1590 if (copy_from_user(gfout, arg, sizeof(*gfout))) {
1591 rc = -EFAULT;
1592 goto gf_free;
1593 }
1594
1595 /* Call mdc_iocontrol */
1596 rc = obd_iocontrol(OBD_IOC_FID2PATH, exp, outsize, gfout, NULL);
1597 if (rc != 0)
1598 goto gf_free;
1599
1600 if (copy_to_user(arg, gfout, outsize))
1601 rc = -EFAULT;
1602
1603 gf_free:
1604 kfree(gfout);
1605 return rc;
1606 }
1607
1608 /*
1609 * Read the data_version for inode.
1610 *
1611 * This value is computed using stripe object version on OST.
1612 * Version is computed using server side locking.
1613 *
1614 * @param flags if do sync on the OST side;
1615 * 0: no sync
1616 * LL_DV_RD_FLUSH: flush dirty pages, LCK_PR on OSTs
1617 * LL_DV_WR_FLUSH: drop all caching pages, LCK_PW on OSTs
1618 */
1619 int ll_data_version(struct inode *inode, __u64 *data_version, int flags)
1620 {
1621 struct cl_object *obj = ll_i2info(inode)->lli_clob;
1622 struct lu_env *env;
1623 struct cl_io *io;
1624 u16 refcheck;
1625 int result;
1626
1627 /* If no file object initialized, we consider its version is 0. */
1628 if (!obj) {
1629 *data_version = 0;
1630 return 0;
1631 }
1632
1633 env = cl_env_get(&refcheck);
1634 if (IS_ERR(env))
1635 return PTR_ERR(env);
1636
1637 io = vvp_env_thread_io(env);
1638 io->ci_obj = obj;
1639 io->u.ci_data_version.dv_data_version = 0;
1640 io->u.ci_data_version.dv_flags = flags;
1641
1642 restart:
1643 if (!cl_io_init(env, io, CIT_DATA_VERSION, io->ci_obj))
1644 result = cl_io_loop(env, io);
1645 else
1646 result = io->ci_result;
1647
1648 *data_version = io->u.ci_data_version.dv_data_version;
1649
1650 cl_io_fini(env, io);
1651
1652 if (unlikely(io->ci_need_restart))
1653 goto restart;
1654
1655 cl_env_put(env, &refcheck);
1656
1657 return result;
1658 }
1659
1660 /*
1661 * Trigger a HSM release request for the provided inode.
1662 */
1663 int ll_hsm_release(struct inode *inode)
1664 {
1665 struct lu_env *env;
1666 struct obd_client_handle *och = NULL;
1667 __u64 data_version = 0;
1668 int rc;
1669 u16 refcheck;
1670
1671 CDEBUG(D_INODE, "%s: Releasing file " DFID ".\n",
1672 ll_get_fsname(inode->i_sb, NULL, 0),
1673 PFID(&ll_i2info(inode)->lli_fid));
1674
1675 och = ll_lease_open(inode, NULL, FMODE_WRITE, MDS_OPEN_RELEASE);
1676 if (IS_ERR(och)) {
1677 rc = PTR_ERR(och);
1678 goto out;
1679 }
1680
1681 /* Grab latest data_version and [am]time values */
1682 rc = ll_data_version(inode, &data_version, LL_DV_WR_FLUSH);
1683 if (rc != 0)
1684 goto out;
1685
1686 env = cl_env_get(&refcheck);
1687 if (IS_ERR(env)) {
1688 rc = PTR_ERR(env);
1689 goto out;
1690 }
1691
1692 ll_merge_attr(env, inode);
1693 cl_env_put(env, &refcheck);
1694
1695 /* Release the file.
1696 * NB: lease lock handle is released in mdc_hsm_release_pack() because
1697 * we still need it to pack l_remote_handle to MDT.
1698 */
1699 rc = ll_close_inode_openhandle(inode, och, MDS_HSM_RELEASE,
1700 &data_version);
1701 och = NULL;
1702
1703 out:
1704 if (och && !IS_ERR(och)) /* close the file */
1705 ll_lease_close(och, inode, NULL);
1706
1707 return rc;
1708 }
1709
1710 struct ll_swap_stack {
1711 u64 dv1;
1712 u64 dv2;
1713 struct inode *inode1;
1714 struct inode *inode2;
1715 bool check_dv1;
1716 bool check_dv2;
1717 };
1718
1719 static int ll_swap_layouts(struct file *file1, struct file *file2,
1720 struct lustre_swap_layouts *lsl)
1721 {
1722 struct mdc_swap_layouts msl;
1723 struct md_op_data *op_data;
1724 __u32 gid;
1725 __u64 dv;
1726 struct ll_swap_stack *llss = NULL;
1727 int rc;
1728
1729 llss = kzalloc(sizeof(*llss), GFP_NOFS);
1730 if (!llss)
1731 return -ENOMEM;
1732
1733 llss->inode1 = file_inode(file1);
1734 llss->inode2 = file_inode(file2);
1735
1736 rc = ll_check_swap_layouts_validity(llss->inode1, llss->inode2);
1737 if (rc < 0)
1738 goto free;
1739
1740 /* we use 2 bool because it is easier to swap than 2 bits */
1741 if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV1)
1742 llss->check_dv1 = true;
1743
1744 if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV2)
1745 llss->check_dv2 = true;
1746
1747 /* we cannot use lsl->sl_dvX directly because we may swap them */
1748 llss->dv1 = lsl->sl_dv1;
1749 llss->dv2 = lsl->sl_dv2;
1750
1751 rc = lu_fid_cmp(ll_inode2fid(llss->inode1), ll_inode2fid(llss->inode2));
1752 if (!rc) /* same file, done! */
1753 goto free;
1754
1755 if (rc < 0) { /* sequentialize it */
1756 swap(llss->inode1, llss->inode2);
1757 swap(file1, file2);
1758 swap(llss->dv1, llss->dv2);
1759 swap(llss->check_dv1, llss->check_dv2);
1760 }
1761
1762 gid = lsl->sl_gid;
1763 if (gid != 0) { /* application asks to flush dirty cache */
1764 rc = ll_get_grouplock(llss->inode1, file1, gid);
1765 if (rc < 0)
1766 goto free;
1767
1768 rc = ll_get_grouplock(llss->inode2, file2, gid);
1769 if (rc < 0) {
1770 ll_put_grouplock(llss->inode1, file1, gid);
1771 goto free;
1772 }
1773 }
1774
1775 /* ultimate check, before swapping the layouts we check if
1776 * dataversion has changed (if requested)
1777 */
1778 if (llss->check_dv1) {
1779 rc = ll_data_version(llss->inode1, &dv, 0);
1780 if (rc)
1781 goto putgl;
1782 if (dv != llss->dv1) {
1783 rc = -EAGAIN;
1784 goto putgl;
1785 }
1786 }
1787
1788 if (llss->check_dv2) {
1789 rc = ll_data_version(llss->inode2, &dv, 0);
1790 if (rc)
1791 goto putgl;
1792 if (dv != llss->dv2) {
1793 rc = -EAGAIN;
1794 goto putgl;
1795 }
1796 }
1797
1798 /* struct md_op_data is used to send the swap args to the mdt
1799 * only flags is missing, so we use struct mdc_swap_layouts
1800 * through the md_op_data->op_data
1801 */
1802 /* flags from user space have to be converted before they are send to
1803 * server, no flag is sent today, they are only used on the client
1804 */
1805 msl.msl_flags = 0;
1806 rc = -ENOMEM;
1807 op_data = ll_prep_md_op_data(NULL, llss->inode1, llss->inode2, NULL, 0,
1808 0, LUSTRE_OPC_ANY, &msl);
1809 if (IS_ERR(op_data)) {
1810 rc = PTR_ERR(op_data);
1811 goto free;
1812 }
1813
1814 rc = obd_iocontrol(LL_IOC_LOV_SWAP_LAYOUTS, ll_i2mdexp(llss->inode1),
1815 sizeof(*op_data), op_data, NULL);
1816 ll_finish_md_op_data(op_data);
1817
1818 putgl:
1819 if (gid != 0) {
1820 ll_put_grouplock(llss->inode2, file2, gid);
1821 ll_put_grouplock(llss->inode1, file1, gid);
1822 }
1823
1824 free:
1825 kfree(llss);
1826
1827 return rc;
1828 }
1829
1830 int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss)
1831 {
1832 struct md_op_data *op_data;
1833 int rc;
1834
1835 /* Detect out-of range masks */
1836 if ((hss->hss_setmask | hss->hss_clearmask) & ~HSM_FLAGS_MASK)
1837 return -EINVAL;
1838
1839 /* Non-root users are forbidden to set or clear flags which are
1840 * NOT defined in HSM_USER_MASK.
1841 */
1842 if (((hss->hss_setmask | hss->hss_clearmask) & ~HSM_USER_MASK) &&
1843 !capable(CFS_CAP_SYS_ADMIN))
1844 return -EPERM;
1845
1846 /* Detect out-of range archive id */
1847 if ((hss->hss_valid & HSS_ARCHIVE_ID) &&
1848 (hss->hss_archive_id > LL_HSM_MAX_ARCHIVE))
1849 return -EINVAL;
1850
1851 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1852 LUSTRE_OPC_ANY, hss);
1853 if (IS_ERR(op_data))
1854 return PTR_ERR(op_data);
1855
1856 rc = obd_iocontrol(LL_IOC_HSM_STATE_SET, ll_i2mdexp(inode),
1857 sizeof(*op_data), op_data, NULL);
1858
1859 ll_finish_md_op_data(op_data);
1860
1861 return rc;
1862 }
1863
1864 static int ll_hsm_import(struct inode *inode, struct file *file,
1865 struct hsm_user_import *hui)
1866 {
1867 struct hsm_state_set *hss = NULL;
1868 struct iattr *attr = NULL;
1869 int rc;
1870
1871 if (!S_ISREG(inode->i_mode))
1872 return -EINVAL;
1873
1874 /* set HSM flags */
1875 hss = kzalloc(sizeof(*hss), GFP_NOFS);
1876 if (!hss)
1877 return -ENOMEM;
1878
1879 hss->hss_valid = HSS_SETMASK | HSS_ARCHIVE_ID;
1880 hss->hss_archive_id = hui->hui_archive_id;
1881 hss->hss_setmask = HS_ARCHIVED | HS_EXISTS | HS_RELEASED;
1882 rc = ll_hsm_state_set(inode, hss);
1883 if (rc != 0)
1884 goto free_hss;
1885
1886 attr = kzalloc(sizeof(*attr), GFP_NOFS);
1887 if (!attr) {
1888 rc = -ENOMEM;
1889 goto free_hss;
1890 }
1891
1892 attr->ia_mode = hui->hui_mode & 0777;
1893 attr->ia_mode |= S_IFREG;
1894 attr->ia_uid = make_kuid(&init_user_ns, hui->hui_uid);
1895 attr->ia_gid = make_kgid(&init_user_ns, hui->hui_gid);
1896 attr->ia_size = hui->hui_size;
1897 attr->ia_mtime.tv_sec = hui->hui_mtime;
1898 attr->ia_mtime.tv_nsec = hui->hui_mtime_ns;
1899 attr->ia_atime.tv_sec = hui->hui_atime;
1900 attr->ia_atime.tv_nsec = hui->hui_atime_ns;
1901
1902 attr->ia_valid = ATTR_SIZE | ATTR_MODE | ATTR_FORCE |
1903 ATTR_UID | ATTR_GID |
1904 ATTR_MTIME | ATTR_MTIME_SET |
1905 ATTR_ATIME | ATTR_ATIME_SET;
1906
1907 inode_lock(inode);
1908
1909 rc = ll_setattr_raw(file->f_path.dentry, attr, true);
1910 if (rc == -ENODATA)
1911 rc = 0;
1912
1913 inode_unlock(inode);
1914
1915 kfree(attr);
1916 free_hss:
1917 kfree(hss);
1918 return rc;
1919 }
1920
1921 static inline long ll_lease_type_from_fmode(fmode_t fmode)
1922 {
1923 return ((fmode & FMODE_READ) ? LL_LEASE_RDLCK : 0) |
1924 ((fmode & FMODE_WRITE) ? LL_LEASE_WRLCK : 0);
1925 }
1926
1927 static long
1928 ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1929 {
1930 struct inode *inode = file_inode(file);
1931 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1932 int flags, rc;
1933
1934 CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p),cmd=%x\n",
1935 PFID(ll_inode2fid(inode)), inode, cmd);
1936 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1937
1938 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1939 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1940 return -ENOTTY;
1941
1942 switch (cmd) {
1943 case LL_IOC_GETFLAGS:
1944 /* Get the current value of the file flags */
1945 return put_user(fd->fd_flags, (int __user *)arg);
1946 case LL_IOC_SETFLAGS:
1947 case LL_IOC_CLRFLAGS:
1948 /* Set or clear specific file flags */
1949 /* XXX This probably needs checks to ensure the flags are
1950 * not abused, and to handle any flag side effects.
1951 */
1952 if (get_user(flags, (int __user *)arg))
1953 return -EFAULT;
1954
1955 if (cmd == LL_IOC_SETFLAGS) {
1956 if ((flags & LL_FILE_IGNORE_LOCK) &&
1957 !(file->f_flags & O_DIRECT)) {
1958 CERROR("%s: unable to disable locking on non-O_DIRECT file\n",
1959 current->comm);
1960 return -EINVAL;
1961 }
1962
1963 fd->fd_flags |= flags;
1964 } else {
1965 fd->fd_flags &= ~flags;
1966 }
1967 return 0;
1968 case LL_IOC_LOV_SETSTRIPE:
1969 return ll_lov_setstripe(inode, file, arg);
1970 case LL_IOC_LOV_SETEA:
1971 return ll_lov_setea(inode, file, arg);
1972 case LL_IOC_LOV_SWAP_LAYOUTS: {
1973 struct file *file2;
1974 struct lustre_swap_layouts lsl;
1975
1976 if (copy_from_user(&lsl, (char __user *)arg,
1977 sizeof(struct lustre_swap_layouts)))
1978 return -EFAULT;
1979
1980 if ((file->f_flags & O_ACCMODE) == O_RDONLY)
1981 return -EPERM;
1982
1983 file2 = fget(lsl.sl_fd);
1984 if (!file2)
1985 return -EBADF;
1986
1987 /* O_WRONLY or O_RDWR */
1988 if ((file2->f_flags & O_ACCMODE) == O_RDONLY) {
1989 rc = -EPERM;
1990 goto out;
1991 }
1992
1993 if (lsl.sl_flags & SWAP_LAYOUTS_CLOSE) {
1994 struct obd_client_handle *och = NULL;
1995 struct ll_inode_info *lli;
1996 struct inode *inode2;
1997
1998 if (lsl.sl_flags != SWAP_LAYOUTS_CLOSE) {
1999 rc = -EINVAL;
2000 goto out;
2001 }
2002
2003 lli = ll_i2info(inode);
2004 mutex_lock(&lli->lli_och_mutex);
2005 if (fd->fd_lease_och) {
2006 och = fd->fd_lease_och;
2007 fd->fd_lease_och = NULL;
2008 }
2009 mutex_unlock(&lli->lli_och_mutex);
2010 if (!och) {
2011 rc = -ENOLCK;
2012 goto out;
2013 }
2014 inode2 = file_inode(file2);
2015 rc = ll_swap_layouts_close(och, inode, inode2);
2016 } else {
2017 rc = ll_swap_layouts(file, file2, &lsl);
2018 }
2019 out:
2020 fput(file2);
2021 return rc;
2022 }
2023 case LL_IOC_LOV_GETSTRIPE:
2024 return ll_file_getstripe(inode,
2025 (struct lov_user_md __user *)arg);
2026 case FSFILT_IOC_GETFLAGS:
2027 case FSFILT_IOC_SETFLAGS:
2028 return ll_iocontrol(inode, file, cmd, arg);
2029 case FSFILT_IOC_GETVERSION_OLD:
2030 case FSFILT_IOC_GETVERSION:
2031 return put_user(inode->i_generation, (int __user *)arg);
2032 case LL_IOC_GROUP_LOCK:
2033 return ll_get_grouplock(inode, file, arg);
2034 case LL_IOC_GROUP_UNLOCK:
2035 return ll_put_grouplock(inode, file, arg);
2036 case IOC_OBD_STATFS:
2037 return ll_obd_statfs(inode, (void __user *)arg);
2038
2039 /* We need to special case any other ioctls we want to handle,
2040 * to send them to the MDS/OST as appropriate and to properly
2041 * network encode the arg field.
2042 case FSFILT_IOC_SETVERSION_OLD:
2043 case FSFILT_IOC_SETVERSION:
2044 */
2045 case LL_IOC_FLUSHCTX:
2046 return ll_flush_ctx(inode);
2047 case LL_IOC_PATH2FID: {
2048 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
2049 sizeof(struct lu_fid)))
2050 return -EFAULT;
2051
2052 return 0;
2053 }
2054 case LL_IOC_GETPARENT:
2055 return ll_getparent(file, (struct getparent __user *)arg);
2056 case OBD_IOC_FID2PATH:
2057 return ll_fid2path(inode, (void __user *)arg);
2058 case LL_IOC_DATA_VERSION: {
2059 struct ioc_data_version idv;
2060 int rc;
2061
2062 if (copy_from_user(&idv, (char __user *)arg, sizeof(idv)))
2063 return -EFAULT;
2064
2065 idv.idv_flags &= LL_DV_RD_FLUSH | LL_DV_WR_FLUSH;
2066 rc = ll_data_version(inode, &idv.idv_version, idv.idv_flags);
2067 if (rc == 0 && copy_to_user((char __user *)arg, &idv,
2068 sizeof(idv)))
2069 return -EFAULT;
2070
2071 return rc;
2072 }
2073
2074 case LL_IOC_GET_MDTIDX: {
2075 int mdtidx;
2076
2077 mdtidx = ll_get_mdt_idx(inode);
2078 if (mdtidx < 0)
2079 return mdtidx;
2080
2081 if (put_user(mdtidx, (int __user *)arg))
2082 return -EFAULT;
2083
2084 return 0;
2085 }
2086 case OBD_IOC_GETDTNAME:
2087 case OBD_IOC_GETMDNAME:
2088 return ll_get_obd_name(inode, cmd, arg);
2089 case LL_IOC_HSM_STATE_GET: {
2090 struct md_op_data *op_data;
2091 struct hsm_user_state *hus;
2092 int rc;
2093
2094 hus = kzalloc(sizeof(*hus), GFP_NOFS);
2095 if (!hus)
2096 return -ENOMEM;
2097
2098 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2099 LUSTRE_OPC_ANY, hus);
2100 if (IS_ERR(op_data)) {
2101 kfree(hus);
2102 return PTR_ERR(op_data);
2103 }
2104
2105 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data),
2106 op_data, NULL);
2107
2108 if (copy_to_user((void __user *)arg, hus, sizeof(*hus)))
2109 rc = -EFAULT;
2110
2111 ll_finish_md_op_data(op_data);
2112 kfree(hus);
2113 return rc;
2114 }
2115 case LL_IOC_HSM_STATE_SET: {
2116 struct hsm_state_set *hss;
2117 int rc;
2118
2119 hss = memdup_user((char __user *)arg, sizeof(*hss));
2120 if (IS_ERR(hss))
2121 return PTR_ERR(hss);
2122
2123 rc = ll_hsm_state_set(inode, hss);
2124
2125 kfree(hss);
2126 return rc;
2127 }
2128 case LL_IOC_HSM_ACTION: {
2129 struct md_op_data *op_data;
2130 struct hsm_current_action *hca;
2131 int rc;
2132
2133 hca = kzalloc(sizeof(*hca), GFP_NOFS);
2134 if (!hca)
2135 return -ENOMEM;
2136
2137 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2138 LUSTRE_OPC_ANY, hca);
2139 if (IS_ERR(op_data)) {
2140 kfree(hca);
2141 return PTR_ERR(op_data);
2142 }
2143
2144 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data),
2145 op_data, NULL);
2146
2147 if (copy_to_user((char __user *)arg, hca, sizeof(*hca)))
2148 rc = -EFAULT;
2149
2150 ll_finish_md_op_data(op_data);
2151 kfree(hca);
2152 return rc;
2153 }
2154 case LL_IOC_SET_LEASE: {
2155 struct ll_inode_info *lli = ll_i2info(inode);
2156 struct obd_client_handle *och = NULL;
2157 bool lease_broken;
2158 fmode_t fmode;
2159
2160 switch (arg) {
2161 case LL_LEASE_WRLCK:
2162 if (!(file->f_mode & FMODE_WRITE))
2163 return -EPERM;
2164 fmode = FMODE_WRITE;
2165 break;
2166 case LL_LEASE_RDLCK:
2167 if (!(file->f_mode & FMODE_READ))
2168 return -EPERM;
2169 fmode = FMODE_READ;
2170 break;
2171 case LL_LEASE_UNLCK:
2172 mutex_lock(&lli->lli_och_mutex);
2173 if (fd->fd_lease_och) {
2174 och = fd->fd_lease_och;
2175 fd->fd_lease_och = NULL;
2176 }
2177 mutex_unlock(&lli->lli_och_mutex);
2178
2179 if (!och)
2180 return -ENOLCK;
2181
2182 fmode = och->och_flags;
2183 rc = ll_lease_close(och, inode, &lease_broken);
2184 if (rc < 0)
2185 return rc;
2186
2187 if (lease_broken)
2188 fmode = 0;
2189
2190 return ll_lease_type_from_fmode(fmode);
2191 default:
2192 return -EINVAL;
2193 }
2194
2195 CDEBUG(D_INODE, "Set lease with mode %u\n", fmode);
2196
2197 /* apply for lease */
2198 och = ll_lease_open(inode, file, fmode, 0);
2199 if (IS_ERR(och))
2200 return PTR_ERR(och);
2201
2202 rc = 0;
2203 mutex_lock(&lli->lli_och_mutex);
2204 if (!fd->fd_lease_och) {
2205 fd->fd_lease_och = och;
2206 och = NULL;
2207 }
2208 mutex_unlock(&lli->lli_och_mutex);
2209 if (och) {
2210 /* impossible now that only excl is supported for now */
2211 ll_lease_close(och, inode, &lease_broken);
2212 rc = -EBUSY;
2213 }
2214 return rc;
2215 }
2216 case LL_IOC_GET_LEASE: {
2217 struct ll_inode_info *lli = ll_i2info(inode);
2218 struct ldlm_lock *lock = NULL;
2219 fmode_t fmode = 0;
2220
2221 mutex_lock(&lli->lli_och_mutex);
2222 if (fd->fd_lease_och) {
2223 struct obd_client_handle *och = fd->fd_lease_och;
2224
2225 lock = ldlm_handle2lock(&och->och_lease_handle);
2226 if (lock) {
2227 lock_res_and_lock(lock);
2228 if (!ldlm_is_cancel(lock))
2229 fmode = och->och_flags;
2230 unlock_res_and_lock(lock);
2231 LDLM_LOCK_PUT(lock);
2232 }
2233 }
2234 mutex_unlock(&lli->lli_och_mutex);
2235 return ll_lease_type_from_fmode(fmode);
2236 }
2237 case LL_IOC_HSM_IMPORT: {
2238 struct hsm_user_import *hui;
2239
2240 hui = memdup_user((void __user *)arg, sizeof(*hui));
2241 if (IS_ERR(hui))
2242 return PTR_ERR(hui);
2243
2244 rc = ll_hsm_import(inode, file, hui);
2245
2246 kfree(hui);
2247 return rc;
2248 }
2249 default: {
2250 int err;
2251
2252 if (ll_iocontrol_call(inode, file, cmd, arg, &err) ==
2253 LLIOC_STOP)
2254 return err;
2255
2256 return obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
2257 (void __user *)arg);
2258 }
2259 }
2260 }
2261
2262 static loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
2263 {
2264 struct inode *inode = file_inode(file);
2265 loff_t retval, eof = 0;
2266
2267 retval = offset + ((origin == SEEK_END) ? i_size_read(inode) :
2268 (origin == SEEK_CUR) ? file->f_pos : 0);
2269 CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p), to=%llu=%#llx(%d)\n",
2270 PFID(ll_inode2fid(inode)), inode, retval, retval, origin);
2271 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK, 1);
2272
2273 if (origin == SEEK_END || origin == SEEK_HOLE || origin == SEEK_DATA) {
2274 retval = ll_glimpse_size(inode);
2275 if (retval != 0)
2276 return retval;
2277 eof = i_size_read(inode);
2278 }
2279
2280 return generic_file_llseek_size(file, offset, origin,
2281 ll_file_maxbytes(inode), eof);
2282 }
2283
2284 static int ll_flush(struct file *file, fl_owner_t id)
2285 {
2286 struct inode *inode = file_inode(file);
2287 struct ll_inode_info *lli = ll_i2info(inode);
2288 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2289 int rc, err;
2290
2291 LASSERT(!S_ISDIR(inode->i_mode));
2292
2293 /* catch async errors that were recorded back when async writeback
2294 * failed for pages in this mapping.
2295 */
2296 rc = lli->lli_async_rc;
2297 lli->lli_async_rc = 0;
2298 if (lli->lli_clob) {
2299 err = lov_read_and_clear_async_rc(lli->lli_clob);
2300 if (!rc)
2301 rc = err;
2302 }
2303
2304 /* The application has been told about write failure already.
2305 * Do not report failure again.
2306 */
2307 if (fd->fd_write_failed)
2308 return 0;
2309 return rc ? -EIO : 0;
2310 }
2311
2312 /**
2313 * Called to make sure a portion of file has been written out.
2314 * if @mode is not CL_FSYNC_LOCAL, it will send OST_SYNC RPCs to OST.
2315 *
2316 * Return how many pages have been written.
2317 */
2318 int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end,
2319 enum cl_fsync_mode mode, int ignore_layout)
2320 {
2321 struct lu_env *env;
2322 struct cl_io *io;
2323 struct cl_fsync_io *fio;
2324 int result;
2325 u16 refcheck;
2326
2327 if (mode != CL_FSYNC_NONE && mode != CL_FSYNC_LOCAL &&
2328 mode != CL_FSYNC_DISCARD && mode != CL_FSYNC_ALL)
2329 return -EINVAL;
2330
2331 env = cl_env_get(&refcheck);
2332 if (IS_ERR(env))
2333 return PTR_ERR(env);
2334
2335 io = vvp_env_thread_io(env);
2336 io->ci_obj = ll_i2info(inode)->lli_clob;
2337 io->ci_ignore_layout = ignore_layout;
2338
2339 /* initialize parameters for sync */
2340 fio = &io->u.ci_fsync;
2341 fio->fi_start = start;
2342 fio->fi_end = end;
2343 fio->fi_fid = ll_inode2fid(inode);
2344 fio->fi_mode = mode;
2345 fio->fi_nr_written = 0;
2346
2347 if (cl_io_init(env, io, CIT_FSYNC, io->ci_obj) == 0)
2348 result = cl_io_loop(env, io);
2349 else
2350 result = io->ci_result;
2351 if (result == 0)
2352 result = fio->fi_nr_written;
2353 cl_io_fini(env, io);
2354 cl_env_put(env, &refcheck);
2355
2356 return result;
2357 }
2358
2359 int ll_fsync(struct file *file, loff_t start, loff_t end, int datasync)
2360 {
2361 struct inode *inode = file_inode(file);
2362 struct ll_inode_info *lli = ll_i2info(inode);
2363 struct ptlrpc_request *req;
2364 int rc, err;
2365
2366 CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p)\n",
2367 PFID(ll_inode2fid(inode)), inode);
2368 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1);
2369
2370 rc = file_write_and_wait_range(file, start, end);
2371 inode_lock(inode);
2372
2373 /* catch async errors that were recorded back when async writeback
2374 * failed for pages in this mapping.
2375 */
2376 if (!S_ISDIR(inode->i_mode)) {
2377 err = lli->lli_async_rc;
2378 lli->lli_async_rc = 0;
2379 if (rc == 0)
2380 rc = err;
2381 if (lli->lli_clob) {
2382 err = lov_read_and_clear_async_rc(lli->lli_clob);
2383 if (rc == 0)
2384 rc = err;
2385 }
2386 }
2387
2388 err = md_sync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), &req);
2389 if (!rc)
2390 rc = err;
2391 if (!err)
2392 ptlrpc_req_finished(req);
2393
2394 if (S_ISREG(inode->i_mode)) {
2395 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2396
2397 err = cl_sync_file_range(inode, start, end, CL_FSYNC_ALL, 0);
2398 if (rc == 0 && err < 0)
2399 rc = err;
2400 if (rc < 0)
2401 fd->fd_write_failed = true;
2402 else
2403 fd->fd_write_failed = false;
2404 }
2405
2406 inode_unlock(inode);
2407 return rc;
2408 }
2409
2410 static int
2411 ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
2412 {
2413 struct inode *inode = file_inode(file);
2414 struct ll_sb_info *sbi = ll_i2sbi(inode);
2415 struct ldlm_enqueue_info einfo = {
2416 .ei_type = LDLM_FLOCK,
2417 .ei_cb_cp = ldlm_flock_completion_ast,
2418 .ei_cbdata = file_lock,
2419 };
2420 struct md_op_data *op_data;
2421 struct lustre_handle lockh = {0};
2422 union ldlm_policy_data flock = { { 0 } };
2423 int fl_type = file_lock->fl_type;
2424 __u64 flags = 0;
2425 int rc;
2426 int rc2 = 0;
2427
2428 CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID " file_lock=%p\n",
2429 PFID(ll_inode2fid(inode)), file_lock);
2430
2431 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK, 1);
2432
2433 if (file_lock->fl_flags & FL_FLOCK)
2434 LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK));
2435 else if (!(file_lock->fl_flags & FL_POSIX))
2436 return -EINVAL;
2437
2438 flock.l_flock.owner = (unsigned long)file_lock->fl_owner;
2439 flock.l_flock.pid = file_lock->fl_pid;
2440 flock.l_flock.start = file_lock->fl_start;
2441 flock.l_flock.end = file_lock->fl_end;
2442
2443 /* Somewhat ugly workaround for svc lockd.
2444 * lockd installs custom fl_lmops->lm_compare_owner that checks
2445 * for the fl_owner to be the same (which it always is on local node
2446 * I guess between lockd processes) and then compares pid.
2447 * As such we assign pid to the owner field to make it all work,
2448 * conflict with normal locks is unlikely since pid space and
2449 * pointer space for current->files are not intersecting
2450 */
2451 if (file_lock->fl_lmops && file_lock->fl_lmops->lm_compare_owner)
2452 flock.l_flock.owner = (unsigned long)file_lock->fl_pid;
2453
2454 switch (fl_type) {
2455 case F_RDLCK:
2456 einfo.ei_mode = LCK_PR;
2457 break;
2458 case F_UNLCK:
2459 /* An unlock request may or may not have any relation to
2460 * existing locks so we may not be able to pass a lock handle
2461 * via a normal ldlm_lock_cancel() request. The request may even
2462 * unlock a byte range in the middle of an existing lock. In
2463 * order to process an unlock request we need all of the same
2464 * information that is given with a normal read or write record
2465 * lock request. To avoid creating another ldlm unlock (cancel)
2466 * message we'll treat a LCK_NL flock request as an unlock.
2467 */
2468 einfo.ei_mode = LCK_NL;
2469 break;
2470 case F_WRLCK:
2471 einfo.ei_mode = LCK_PW;
2472 break;
2473 default:
2474 CDEBUG(D_INFO, "Unknown fcntl lock type: %d\n", fl_type);
2475 return -ENOTSUPP;
2476 }
2477
2478 switch (cmd) {
2479 case F_SETLKW:
2480 #ifdef F_SETLKW64
2481 case F_SETLKW64:
2482 #endif
2483 flags = 0;
2484 break;
2485 case F_SETLK:
2486 #ifdef F_SETLK64
2487 case F_SETLK64:
2488 #endif
2489 flags = LDLM_FL_BLOCK_NOWAIT;
2490 break;
2491 case F_GETLK:
2492 #ifdef F_GETLK64
2493 case F_GETLK64:
2494 #endif
2495 flags = LDLM_FL_TEST_LOCK;
2496 break;
2497 default:
2498 CERROR("unknown fcntl lock command: %d\n", cmd);
2499 return -EINVAL;
2500 }
2501
2502 /*
2503 * Save the old mode so that if the mode in the lock changes we
2504 * can decrement the appropriate reader or writer refcount.
2505 */
2506 file_lock->fl_type = einfo.ei_mode;
2507
2508 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2509 LUSTRE_OPC_ANY, NULL);
2510 if (IS_ERR(op_data))
2511 return PTR_ERR(op_data);
2512
2513 CDEBUG(D_DLMTRACE, "inode=" DFID ", pid=%u, flags=%#llx, mode=%u, start=%llu, end=%llu\n",
2514 PFID(ll_inode2fid(inode)), flock.l_flock.pid, flags,
2515 einfo.ei_mode, flock.l_flock.start, flock.l_flock.end);
2516
2517 rc = md_enqueue(sbi->ll_md_exp, &einfo, &flock, NULL, op_data, &lockh,
2518 flags);
2519
2520 /* Restore the file lock type if not TEST lock. */
2521 if (!(flags & LDLM_FL_TEST_LOCK))
2522 file_lock->fl_type = fl_type;
2523
2524 if ((rc == 0 || file_lock->fl_type == F_UNLCK) &&
2525 !(flags & LDLM_FL_TEST_LOCK))
2526 rc2 = locks_lock_file_wait(file, file_lock);
2527
2528 if (rc2 && file_lock->fl_type != F_UNLCK) {
2529 einfo.ei_mode = LCK_NL;
2530 md_enqueue(sbi->ll_md_exp, &einfo, &flock, NULL, op_data,
2531 &lockh, flags);
2532 rc = rc2;
2533 }
2534
2535 ll_finish_md_op_data(op_data);
2536
2537 return rc;
2538 }
2539
2540 int ll_get_fid_by_name(struct inode *parent, const char *name,
2541 int namelen, struct lu_fid *fid,
2542 struct inode **inode)
2543 {
2544 struct md_op_data *op_data = NULL;
2545 struct ptlrpc_request *req;
2546 struct mdt_body *body;
2547 int rc;
2548
2549 op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen, 0,
2550 LUSTRE_OPC_ANY, NULL);
2551 if (IS_ERR(op_data))
2552 return PTR_ERR(op_data);
2553
2554 op_data->op_valid = OBD_MD_FLID | OBD_MD_FLTYPE;
2555 rc = md_getattr_name(ll_i2sbi(parent)->ll_md_exp, op_data, &req);
2556 ll_finish_md_op_data(op_data);
2557 if (rc < 0)
2558 return rc;
2559
2560 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2561 if (!body) {
2562 rc = -EFAULT;
2563 goto out_req;
2564 }
2565 if (fid)
2566 *fid = body->mbo_fid1;
2567
2568 if (inode)
2569 rc = ll_prep_inode(inode, req, parent->i_sb, NULL);
2570 out_req:
2571 ptlrpc_req_finished(req);
2572 return rc;
2573 }
2574
2575 int ll_migrate(struct inode *parent, struct file *file, int mdtidx,
2576 const char *name, int namelen)
2577 {
2578 struct ptlrpc_request *request = NULL;
2579 struct obd_client_handle *och = NULL;
2580 struct inode *child_inode = NULL;
2581 struct dentry *dchild = NULL;
2582 struct md_op_data *op_data;
2583 struct mdt_body *body;
2584 u64 data_version = 0;
2585 struct qstr qstr;
2586 int rc;
2587
2588 CDEBUG(D_VFSTRACE, "migrate %s under " DFID " to MDT%d\n",
2589 name, PFID(ll_inode2fid(parent)), mdtidx);
2590
2591 op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen,
2592 0, LUSTRE_OPC_ANY, NULL);
2593 if (IS_ERR(op_data))
2594 return PTR_ERR(op_data);
2595
2596 /* Get child FID first */
2597 qstr.hash = full_name_hash(parent, name, namelen);
2598 qstr.name = name;
2599 qstr.len = namelen;
2600 dchild = d_lookup(file_dentry(file), &qstr);
2601 if (dchild) {
2602 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
2603 if (dchild->d_inode)
2604 child_inode = igrab(dchild->d_inode);
2605 dput(dchild);
2606 }
2607
2608 if (!child_inode) {
2609 rc = ll_get_fid_by_name(parent, name, namelen,
2610 &op_data->op_fid3, &child_inode);
2611 if (rc)
2612 goto out_free;
2613 }
2614
2615 if (!child_inode) {
2616 rc = -EINVAL;
2617 goto out_free;
2618 }
2619
2620 inode_lock(child_inode);
2621 op_data->op_fid3 = *ll_inode2fid(child_inode);
2622 if (!fid_is_sane(&op_data->op_fid3)) {
2623 CERROR("%s: migrate %s, but fid " DFID " is insane\n",
2624 ll_get_fsname(parent->i_sb, NULL, 0), name,
2625 PFID(&op_data->op_fid3));
2626 rc = -EINVAL;
2627 goto out_unlock;
2628 }
2629
2630 rc = ll_get_mdt_idx_by_fid(ll_i2sbi(parent), &op_data->op_fid3);
2631 if (rc < 0)
2632 goto out_unlock;
2633
2634 if (rc == mdtidx) {
2635 CDEBUG(D_INFO, "%s: " DFID " is already on MDT%d.\n", name,
2636 PFID(&op_data->op_fid3), mdtidx);
2637 rc = 0;
2638 goto out_unlock;
2639 }
2640 again:
2641 if (S_ISREG(child_inode->i_mode)) {
2642 och = ll_lease_open(child_inode, NULL, FMODE_WRITE, 0);
2643 if (IS_ERR(och)) {
2644 rc = PTR_ERR(och);
2645 och = NULL;
2646 goto out_unlock;
2647 }
2648
2649 rc = ll_data_version(child_inode, &data_version,
2650 LL_DV_WR_FLUSH);
2651 if (rc)
2652 goto out_close;
2653
2654 op_data->op_handle = och->och_fh;
2655 op_data->op_data = och->och_mod;
2656 op_data->op_data_version = data_version;
2657 op_data->op_lease_handle = och->och_lease_handle;
2658 op_data->op_bias |= MDS_RENAME_MIGRATE;
2659 }
2660
2661 op_data->op_mds = mdtidx;
2662 op_data->op_cli_flags = CLI_MIGRATE;
2663 rc = md_rename(ll_i2sbi(parent)->ll_md_exp, op_data, name,
2664 namelen, name, namelen, &request);
2665 if (!rc) {
2666 LASSERT(request);
2667 ll_update_times(request, parent);
2668
2669 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
2670 LASSERT(body);
2671
2672 /*
2673 * If the server does release layout lock, then we cleanup
2674 * the client och here, otherwise release it in out_close:
2675 */
2676 if (och && body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED) {
2677 obd_mod_put(och->och_mod);
2678 md_clear_open_replay_data(ll_i2sbi(parent)->ll_md_exp,
2679 och);
2680 och->och_fh.cookie = DEAD_HANDLE_MAGIC;
2681 kfree(och);
2682 och = NULL;
2683 }
2684 }
2685
2686 if (request) {
2687 ptlrpc_req_finished(request);
2688 request = NULL;
2689 }
2690
2691 /* Try again if the file layout has changed. */
2692 if (rc == -EAGAIN && S_ISREG(child_inode->i_mode))
2693 goto again;
2694
2695 out_close:
2696 if (och) /* close the file */
2697 ll_lease_close(och, child_inode, NULL);
2698 if (!rc)
2699 clear_nlink(child_inode);
2700 out_unlock:
2701 inode_unlock(child_inode);
2702 iput(child_inode);
2703 out_free:
2704 ll_finish_md_op_data(op_data);
2705 return rc;
2706 }
2707
2708 static int
2709 ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock)
2710 {
2711 return -ENOSYS;
2712 }
2713
2714 /**
2715 * test if some locks matching bits and l_req_mode are acquired
2716 * - bits can be in different locks
2717 * - if found clear the common lock bits in *bits
2718 * - the bits not found, are kept in *bits
2719 * \param inode [IN]
2720 * \param bits [IN] searched lock bits [IN]
2721 * \param l_req_mode [IN] searched lock mode
2722 * \retval boolean, true iff all bits are found
2723 */
2724 int ll_have_md_lock(struct inode *inode, __u64 *bits,
2725 enum ldlm_mode l_req_mode)
2726 {
2727 struct lustre_handle lockh;
2728 union ldlm_policy_data policy;
2729 enum ldlm_mode mode = (l_req_mode == LCK_MINMODE) ?
2730 (LCK_CR | LCK_CW | LCK_PR | LCK_PW) : l_req_mode;
2731 struct lu_fid *fid;
2732 __u64 flags;
2733 int i;
2734
2735 if (!inode)
2736 return 0;
2737
2738 fid = &ll_i2info(inode)->lli_fid;
2739 CDEBUG(D_INFO, "trying to match res " DFID " mode %s\n", PFID(fid),
2740 ldlm_lockname[mode]);
2741
2742 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK;
2743 for (i = 0; i <= MDS_INODELOCK_MAXSHIFT && *bits != 0; i++) {
2744 policy.l_inodebits.bits = *bits & (1 << i);
2745 if (policy.l_inodebits.bits == 0)
2746 continue;
2747
2748 if (md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS,
2749 &policy, mode, &lockh)) {
2750 struct ldlm_lock *lock;
2751
2752 lock = ldlm_handle2lock(&lockh);
2753 if (lock) {
2754 *bits &=
2755 ~(lock->l_policy_data.l_inodebits.bits);
2756 LDLM_LOCK_PUT(lock);
2757 } else {
2758 *bits &= ~policy.l_inodebits.bits;
2759 }
2760 }
2761 }
2762 return *bits == 0;
2763 }
2764
2765 enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits,
2766 struct lustre_handle *lockh, __u64 flags,
2767 enum ldlm_mode mode)
2768 {
2769 union ldlm_policy_data policy = { .l_inodebits = { bits } };
2770 struct lu_fid *fid;
2771
2772 fid = &ll_i2info(inode)->lli_fid;
2773 CDEBUG(D_INFO, "trying to match res " DFID "\n", PFID(fid));
2774
2775 return md_lock_match(ll_i2mdexp(inode), flags | LDLM_FL_BLOCK_GRANTED,
2776 fid, LDLM_IBITS, &policy, mode, lockh);
2777 }
2778
2779 static int ll_inode_revalidate_fini(struct inode *inode, int rc)
2780 {
2781 /* Already unlinked. Just update nlink and return success */
2782 if (rc == -ENOENT) {
2783 clear_nlink(inode);
2784 /* If it is striped directory, and there is bad stripe
2785 * Let's revalidate the dentry again, instead of returning
2786 * error
2787 */
2788 if (S_ISDIR(inode->i_mode) && ll_i2info(inode)->lli_lsm_md)
2789 return 0;
2790
2791 /* This path cannot be hit for regular files unless in
2792 * case of obscure races, so no need to validate size.
2793 */
2794 if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
2795 return 0;
2796 } else if (rc != 0) {
2797 CDEBUG_LIMIT((rc == -EACCES || rc == -EIDRM) ? D_INFO : D_ERROR,
2798 "%s: revalidate FID " DFID " error: rc = %d\n",
2799 ll_get_fsname(inode->i_sb, NULL, 0),
2800 PFID(ll_inode2fid(inode)), rc);
2801 }
2802
2803 return rc;
2804 }
2805
2806 static int __ll_inode_revalidate(struct dentry *dentry, __u64 ibits)
2807 {
2808 struct inode *inode = d_inode(dentry);
2809 struct ptlrpc_request *req = NULL;
2810 struct obd_export *exp;
2811 int rc = 0;
2812
2813 CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p),name=%pd\n",
2814 PFID(ll_inode2fid(inode)), inode, dentry);
2815
2816 exp = ll_i2mdexp(inode);
2817
2818 /* XXX: Enable OBD_CONNECT_ATTRFID to reduce unnecessary getattr RPC.
2819 * But under CMD case, it caused some lock issues, should be fixed
2820 * with new CMD ibits lock. See bug 12718
2821 */
2822 if (exp_connect_flags(exp) & OBD_CONNECT_ATTRFID) {
2823 struct lookup_intent oit = { .it_op = IT_GETATTR };
2824 struct md_op_data *op_data;
2825
2826 if (ibits == MDS_INODELOCK_LOOKUP)
2827 oit.it_op = IT_LOOKUP;
2828
2829 /* Call getattr by fid, so do not provide name at all. */
2830 op_data = ll_prep_md_op_data(NULL, inode,
2831 inode, NULL, 0, 0,
2832 LUSTRE_OPC_ANY, NULL);
2833 if (IS_ERR(op_data))
2834 return PTR_ERR(op_data);
2835
2836 rc = md_intent_lock(exp, op_data, &oit, &req,
2837 &ll_md_blocking_ast, 0);
2838 ll_finish_md_op_data(op_data);
2839 if (rc < 0) {
2840 rc = ll_inode_revalidate_fini(inode, rc);
2841 goto out;
2842 }
2843
2844 rc = ll_revalidate_it_finish(req, &oit, inode);
2845 if (rc != 0) {
2846 ll_intent_release(&oit);
2847 goto out;
2848 }
2849
2850 /* Unlinked? Unhash dentry, so it is not picked up later by
2851 * do_lookup() -> ll_revalidate_it(). We cannot use d_drop
2852 * here to preserve get_cwd functionality on 2.6.
2853 * Bug 10503
2854 */
2855 if (!d_inode(dentry)->i_nlink) {
2856 spin_lock(&inode->i_lock);
2857 d_lustre_invalidate(dentry, 0);
2858 spin_unlock(&inode->i_lock);
2859 }
2860
2861 ll_lookup_finish_locks(&oit, inode);
2862 } else if (!ll_have_md_lock(d_inode(dentry), &ibits, LCK_MINMODE)) {
2863 struct ll_sb_info *sbi = ll_i2sbi(d_inode(dentry));
2864 u64 valid = OBD_MD_FLGETATTR;
2865 struct md_op_data *op_data;
2866 int ealen = 0;
2867
2868 if (S_ISREG(inode->i_mode)) {
2869 rc = ll_get_default_mdsize(sbi, &ealen);
2870 if (rc)
2871 return rc;
2872 valid |= OBD_MD_FLEASIZE | OBD_MD_FLMODEASIZE;
2873 }
2874
2875 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2876 0, ealen, LUSTRE_OPC_ANY,
2877 NULL);
2878 if (IS_ERR(op_data))
2879 return PTR_ERR(op_data);
2880
2881 op_data->op_valid = valid;
2882 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2883 ll_finish_md_op_data(op_data);
2884 if (rc)
2885 return ll_inode_revalidate_fini(inode, rc);
2886
2887 rc = ll_prep_inode(&inode, req, NULL, NULL);
2888 }
2889 out:
2890 ptlrpc_req_finished(req);
2891 return rc;
2892 }
2893
2894 static int ll_merge_md_attr(struct inode *inode)
2895 {
2896 struct cl_attr attr = { 0 };
2897 int rc;
2898
2899 LASSERT(ll_i2info(inode)->lli_lsm_md);
2900 rc = md_merge_attr(ll_i2mdexp(inode), ll_i2info(inode)->lli_lsm_md,
2901 &attr, ll_md_blocking_ast);
2902 if (rc)
2903 return rc;
2904
2905 set_nlink(inode, attr.cat_nlink);
2906 inode->i_blocks = attr.cat_blocks;
2907 i_size_write(inode, attr.cat_size);
2908
2909 ll_i2info(inode)->lli_atime = attr.cat_atime;
2910 ll_i2info(inode)->lli_mtime = attr.cat_mtime;
2911 ll_i2info(inode)->lli_ctime = attr.cat_ctime;
2912
2913 return 0;
2914 }
2915
2916 static int ll_inode_revalidate(struct dentry *dentry, __u64 ibits)
2917 {
2918 struct inode *inode = d_inode(dentry);
2919 int rc;
2920
2921 rc = __ll_inode_revalidate(dentry, ibits);
2922 if (rc != 0)
2923 return rc;
2924
2925 /* if object isn't regular file, don't validate size */
2926 if (!S_ISREG(inode->i_mode)) {
2927 if (S_ISDIR(inode->i_mode) &&
2928 ll_i2info(inode)->lli_lsm_md) {
2929 rc = ll_merge_md_attr(inode);
2930 if (rc)
2931 return rc;
2932 }
2933
2934 LTIME_S(inode->i_atime) = ll_i2info(inode)->lli_atime;
2935 LTIME_S(inode->i_mtime) = ll_i2info(inode)->lli_mtime;
2936 LTIME_S(inode->i_ctime) = ll_i2info(inode)->lli_ctime;
2937 } else {
2938 struct ll_inode_info *lli = ll_i2info(inode);
2939
2940 /* In case of restore, the MDT has the right size and has
2941 * already send it back without granting the layout lock,
2942 * inode is up-to-date so glimpse is useless.
2943 * Also to glimpse we need the layout, in case of a running
2944 * restore the MDT holds the layout lock so the glimpse will
2945 * block up to the end of restore (getattr will block)
2946 */
2947 if (!test_bit(LLIF_FILE_RESTORING, &lli->lli_flags))
2948 rc = ll_glimpse_size(inode);
2949 }
2950 return rc;
2951 }
2952
2953 int ll_getattr(const struct path *path, struct kstat *stat,
2954 u32 request_mask, unsigned int flags)
2955 {
2956 struct inode *inode = d_inode(path->dentry);
2957 struct ll_sb_info *sbi = ll_i2sbi(inode);
2958 struct ll_inode_info *lli = ll_i2info(inode);
2959 int res;
2960
2961 res = ll_inode_revalidate(path->dentry,
2962 MDS_INODELOCK_UPDATE | MDS_INODELOCK_LOOKUP);
2963 ll_stats_ops_tally(sbi, LPROC_LL_GETATTR, 1);
2964
2965 if (res)
2966 return res;
2967
2968 OBD_FAIL_TIMEOUT(OBD_FAIL_GETATTR_DELAY, 30);
2969
2970 stat->dev = inode->i_sb->s_dev;
2971 if (ll_need_32bit_api(sbi))
2972 stat->ino = cl_fid_build_ino(&lli->lli_fid, 1);
2973 else
2974 stat->ino = inode->i_ino;
2975 stat->mode = inode->i_mode;
2976 stat->uid = inode->i_uid;
2977 stat->gid = inode->i_gid;
2978 stat->rdev = inode->i_rdev;
2979 stat->atime = inode->i_atime;
2980 stat->mtime = inode->i_mtime;
2981 stat->ctime = inode->i_ctime;
2982 stat->blksize = 1 << inode->i_blkbits;
2983
2984 stat->nlink = inode->i_nlink;
2985 stat->size = i_size_read(inode);
2986 stat->blocks = inode->i_blocks;
2987
2988 return 0;
2989 }
2990
2991 static int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2992 __u64 start, __u64 len)
2993 {
2994 int rc;
2995 size_t num_bytes;
2996 struct fiemap *fiemap;
2997 unsigned int extent_count = fieinfo->fi_extents_max;
2998
2999 num_bytes = sizeof(*fiemap) + (extent_count *
3000 sizeof(struct fiemap_extent));
3001 fiemap = libcfs_kvzalloc(num_bytes, GFP_NOFS);
3002 if (!fiemap)
3003 return -ENOMEM;
3004
3005 fiemap->fm_flags = fieinfo->fi_flags;
3006 fiemap->fm_extent_count = fieinfo->fi_extents_max;
3007 fiemap->fm_start = start;
3008 fiemap->fm_length = len;
3009
3010 if (extent_count > 0 &&
3011 copy_from_user(&fiemap->fm_extents[0], fieinfo->fi_extents_start,
3012 sizeof(struct fiemap_extent))) {
3013 rc = -EFAULT;
3014 goto out;
3015 }
3016
3017 rc = ll_do_fiemap(inode, fiemap, num_bytes);
3018
3019 fieinfo->fi_flags = fiemap->fm_flags;
3020 fieinfo->fi_extents_mapped = fiemap->fm_mapped_extents;
3021 if (extent_count > 0 &&
3022 copy_to_user(fieinfo->fi_extents_start, &fiemap->fm_extents[0],
3023 fiemap->fm_mapped_extents *
3024 sizeof(struct fiemap_extent))) {
3025 rc = -EFAULT;
3026 goto out;
3027 }
3028 out:
3029 kvfree(fiemap);
3030 return rc;
3031 }
3032
3033 struct posix_acl *ll_get_acl(struct inode *inode, int type)
3034 {
3035 struct ll_inode_info *lli = ll_i2info(inode);
3036 struct posix_acl *acl = NULL;
3037
3038 spin_lock(&lli->lli_lock);
3039 /* VFS' acl_permission_check->check_acl will release the refcount */
3040 acl = posix_acl_dup(lli->lli_posix_acl);
3041 spin_unlock(&lli->lli_lock);
3042
3043 return acl;
3044 }
3045
3046 int ll_inode_permission(struct inode *inode, int mask)
3047 {
3048 struct ll_sb_info *sbi;
3049 struct root_squash_info *squash;
3050 const struct cred *old_cred = NULL;
3051 struct cred *cred = NULL;
3052 bool squash_id = false;
3053 cfs_cap_t cap;
3054 int rc = 0;
3055
3056 if (mask & MAY_NOT_BLOCK)
3057 return -ECHILD;
3058
3059 /* as root inode are NOT getting validated in lookup operation,
3060 * need to do it before permission check.
3061 */
3062
3063 if (is_root_inode(inode)) {
3064 rc = __ll_inode_revalidate(inode->i_sb->s_root,
3065 MDS_INODELOCK_LOOKUP);
3066 if (rc)
3067 return rc;
3068 }
3069
3070 CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p), inode mode %x mask %o\n",
3071 PFID(ll_inode2fid(inode)), inode, inode->i_mode, mask);
3072
3073 /* squash fsuid/fsgid if needed */
3074 sbi = ll_i2sbi(inode);
3075 squash = &sbi->ll_squash;
3076 if (unlikely(squash->rsi_uid &&
3077 uid_eq(current_fsuid(), GLOBAL_ROOT_UID) &&
3078 !(sbi->ll_flags & LL_SBI_NOROOTSQUASH))) {
3079 squash_id = true;
3080 }
3081
3082 if (squash_id) {
3083 CDEBUG(D_OTHER, "squash creds (%d:%d)=>(%d:%d)\n",
3084 __kuid_val(current_fsuid()), __kgid_val(current_fsgid()),
3085 squash->rsi_uid, squash->rsi_gid);
3086
3087 /*
3088 * update current process's credentials
3089 * and FS capability
3090 */
3091 cred = prepare_creds();
3092 if (!cred)
3093 return -ENOMEM;
3094
3095 cred->fsuid = make_kuid(&init_user_ns, squash->rsi_uid);
3096 cred->fsgid = make_kgid(&init_user_ns, squash->rsi_gid);
3097 for (cap = 0; cap < sizeof(cfs_cap_t) * 8; cap++) {
3098 if ((1 << cap) & CFS_CAP_FS_MASK)
3099 cap_lower(cred->cap_effective, cap);
3100 }
3101 old_cred = override_creds(cred);
3102 }
3103
3104 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
3105 rc = generic_permission(inode, mask);
3106
3107 /* restore current process's credentials and FS capability */
3108 if (squash_id) {
3109 revert_creds(old_cred);
3110 put_cred(cred);
3111 }
3112
3113 return rc;
3114 }
3115
3116 /* -o localflock - only provides locally consistent flock locks */
3117 const struct file_operations ll_file_operations = {
3118 .read_iter = ll_file_read_iter,
3119 .write_iter = ll_file_write_iter,
3120 .unlocked_ioctl = ll_file_ioctl,
3121 .open = ll_file_open,
3122 .release = ll_file_release,
3123 .mmap = ll_file_mmap,
3124 .llseek = ll_file_seek,
3125 .splice_read = generic_file_splice_read,
3126 .fsync = ll_fsync,
3127 .flush = ll_flush
3128 };
3129
3130 const struct file_operations ll_file_operations_flock = {
3131 .read_iter = ll_file_read_iter,
3132 .write_iter = ll_file_write_iter,
3133 .unlocked_ioctl = ll_file_ioctl,
3134 .open = ll_file_open,
3135 .release = ll_file_release,
3136 .mmap = ll_file_mmap,
3137 .llseek = ll_file_seek,
3138 .splice_read = generic_file_splice_read,
3139 .fsync = ll_fsync,
3140 .flush = ll_flush,
3141 .flock = ll_file_flock,
3142 .lock = ll_file_flock
3143 };
3144
3145 /* These are for -o noflock - to return ENOSYS on flock calls */
3146 const struct file_operations ll_file_operations_noflock = {
3147 .read_iter = ll_file_read_iter,
3148 .write_iter = ll_file_write_iter,
3149 .unlocked_ioctl = ll_file_ioctl,
3150 .open = ll_file_open,
3151 .release = ll_file_release,
3152 .mmap = ll_file_mmap,
3153 .llseek = ll_file_seek,
3154 .splice_read = generic_file_splice_read,
3155 .fsync = ll_fsync,
3156 .flush = ll_flush,
3157 .flock = ll_file_noflock,
3158 .lock = ll_file_noflock
3159 };
3160
3161 const struct inode_operations ll_file_inode_operations = {
3162 .setattr = ll_setattr,
3163 .getattr = ll_getattr,
3164 .permission = ll_inode_permission,
3165 .listxattr = ll_listxattr,
3166 .fiemap = ll_fiemap,
3167 .get_acl = ll_get_acl,
3168 };
3169
3170 /* dynamic ioctl number support routines */
3171 static struct llioc_ctl_data {
3172 struct rw_semaphore ioc_sem;
3173 struct list_head ioc_head;
3174 } llioc = {
3175 __RWSEM_INITIALIZER(llioc.ioc_sem),
3176 LIST_HEAD_INIT(llioc.ioc_head)
3177 };
3178
3179 struct llioc_data {
3180 struct list_head iocd_list;
3181 unsigned int iocd_size;
3182 llioc_callback_t iocd_cb;
3183 unsigned int iocd_count;
3184 unsigned int iocd_cmd[0];
3185 };
3186
3187 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd)
3188 {
3189 unsigned int size;
3190 struct llioc_data *in_data = NULL;
3191
3192 if (!cb || !cmd || count > LLIOC_MAX_CMD || count < 0)
3193 return NULL;
3194
3195 size = sizeof(*in_data) + count * sizeof(unsigned int);
3196 in_data = kzalloc(size, GFP_NOFS);
3197 if (!in_data)
3198 return NULL;
3199
3200 in_data->iocd_size = size;
3201 in_data->iocd_cb = cb;
3202 in_data->iocd_count = count;
3203 memcpy(in_data->iocd_cmd, cmd, sizeof(unsigned int) * count);
3204
3205 down_write(&llioc.ioc_sem);
3206 list_add_tail(&in_data->iocd_list, &llioc.ioc_head);
3207 up_write(&llioc.ioc_sem);
3208
3209 return in_data;
3210 }
3211 EXPORT_SYMBOL(ll_iocontrol_register);
3212
3213 void ll_iocontrol_unregister(void *magic)
3214 {
3215 struct llioc_data *tmp;
3216
3217 if (!magic)
3218 return;
3219
3220 down_write(&llioc.ioc_sem);
3221 list_for_each_entry(tmp, &llioc.ioc_head, iocd_list) {
3222 if (tmp == magic) {
3223 list_del(&tmp->iocd_list);
3224 up_write(&llioc.ioc_sem);
3225
3226 kfree(tmp);
3227 return;
3228 }
3229 }
3230 up_write(&llioc.ioc_sem);
3231
3232 CWARN("didn't find iocontrol register block with magic: %p\n", magic);
3233 }
3234 EXPORT_SYMBOL(ll_iocontrol_unregister);
3235
3236 static enum llioc_iter
3237 ll_iocontrol_call(struct inode *inode, struct file *file,
3238 unsigned int cmd, unsigned long arg, int *rcp)
3239 {
3240 enum llioc_iter ret = LLIOC_CONT;
3241 struct llioc_data *data;
3242 int rc = -EINVAL, i;
3243
3244 down_read(&llioc.ioc_sem);
3245 list_for_each_entry(data, &llioc.ioc_head, iocd_list) {
3246 for (i = 0; i < data->iocd_count; i++) {
3247 if (cmd != data->iocd_cmd[i])
3248 continue;
3249
3250 ret = data->iocd_cb(inode, file, cmd, arg, data, &rc);
3251 break;
3252 }
3253
3254 if (ret == LLIOC_STOP)
3255 break;
3256 }
3257 up_read(&llioc.ioc_sem);
3258
3259 if (rcp)
3260 *rcp = rc;
3261 return ret;
3262 }
3263
3264 int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf)
3265 {
3266 struct ll_inode_info *lli = ll_i2info(inode);
3267 struct cl_object *obj = lli->lli_clob;
3268 struct lu_env *env;
3269 int rc;
3270 u16 refcheck;
3271
3272 if (!obj)
3273 return 0;
3274
3275 env = cl_env_get(&refcheck);
3276 if (IS_ERR(env))
3277 return PTR_ERR(env);
3278
3279 rc = cl_conf_set(env, obj, conf);
3280 if (rc < 0)
3281 goto out;
3282
3283 if (conf->coc_opc == OBJECT_CONF_SET) {
3284 struct ldlm_lock *lock = conf->coc_lock;
3285 struct cl_layout cl = {
3286 .cl_layout_gen = 0,
3287 };
3288
3289 LASSERT(lock);
3290 LASSERT(ldlm_has_layout(lock));
3291
3292 /* it can only be allowed to match after layout is
3293 * applied to inode otherwise false layout would be
3294 * seen. Applying layout should happen before dropping
3295 * the intent lock.
3296 */
3297 ldlm_lock_allow_match(lock);
3298
3299 rc = cl_object_layout_get(env, obj, &cl);
3300 if (rc < 0)
3301 goto out;
3302
3303 CDEBUG(D_VFSTRACE, DFID ": layout version change: %u -> %u\n",
3304 PFID(&lli->lli_fid), ll_layout_version_get(lli),
3305 cl.cl_layout_gen);
3306 ll_layout_version_set(lli, cl.cl_layout_gen);
3307 }
3308 out:
3309 cl_env_put(env, &refcheck);
3310 return rc;
3311 }
3312
3313 /* Fetch layout from MDT with getxattr request, if it's not ready yet */
3314 static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
3315
3316 {
3317 struct ll_sb_info *sbi = ll_i2sbi(inode);
3318 struct ptlrpc_request *req;
3319 struct mdt_body *body;
3320 void *lvbdata;
3321 void *lmm;
3322 int lmmsize;
3323 int rc;
3324
3325 CDEBUG(D_INODE, DFID " LVB_READY=%d l_lvb_data=%p l_lvb_len=%d\n",
3326 PFID(ll_inode2fid(inode)), ldlm_is_lvb_ready(lock),
3327 lock->l_lvb_data, lock->l_lvb_len);
3328
3329 if (lock->l_lvb_data && ldlm_is_lvb_ready(lock))
3330 return 0;
3331
3332 /* if layout lock was granted right away, the layout is returned
3333 * within DLM_LVB of dlm reply; otherwise if the lock was ever
3334 * blocked and then granted via completion ast, we have to fetch
3335 * layout here. Please note that we can't use the LVB buffer in
3336 * completion AST because it doesn't have a large enough buffer
3337 */
3338 rc = ll_get_default_mdsize(sbi, &lmmsize);
3339 if (rc == 0)
3340 rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode),
3341 OBD_MD_FLXATTR, XATTR_NAME_LOV, NULL, 0,
3342 lmmsize, 0, &req);
3343 if (rc < 0)
3344 return rc;
3345
3346 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
3347 if (!body) {
3348 rc = -EPROTO;
3349 goto out;
3350 }
3351
3352 lmmsize = body->mbo_eadatasize;
3353 if (lmmsize == 0) /* empty layout */ {
3354 rc = 0;
3355 goto out;
3356 }
3357
3358 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA, lmmsize);
3359 if (!lmm) {
3360 rc = -EFAULT;
3361 goto out;
3362 }
3363
3364 lvbdata = libcfs_kvzalloc(lmmsize, GFP_NOFS);
3365 if (!lvbdata) {
3366 rc = -ENOMEM;
3367 goto out;
3368 }
3369
3370 memcpy(lvbdata, lmm, lmmsize);
3371 lock_res_and_lock(lock);
3372 if (lock->l_lvb_data)
3373 kvfree(lock->l_lvb_data);
3374
3375 lock->l_lvb_data = lvbdata;
3376 lock->l_lvb_len = lmmsize;
3377 unlock_res_and_lock(lock);
3378
3379 out:
3380 ptlrpc_req_finished(req);
3381 return rc;
3382 }
3383
3384 /**
3385 * Apply the layout to the inode. Layout lock is held and will be released
3386 * in this function.
3387 */
3388 static int ll_layout_lock_set(struct lustre_handle *lockh, enum ldlm_mode mode,
3389 struct inode *inode)
3390 {
3391 struct ll_inode_info *lli = ll_i2info(inode);
3392 struct ll_sb_info *sbi = ll_i2sbi(inode);
3393 struct ldlm_lock *lock;
3394 struct cl_object_conf conf;
3395 int rc = 0;
3396 bool lvb_ready;
3397 bool wait_layout = false;
3398
3399 LASSERT(lustre_handle_is_used(lockh));
3400
3401 lock = ldlm_handle2lock(lockh);
3402 LASSERT(lock);
3403 LASSERT(ldlm_has_layout(lock));
3404
3405 LDLM_DEBUG(lock, "File " DFID "(%p) being reconfigured",
3406 PFID(&lli->lli_fid), inode);
3407
3408 /* in case this is a caching lock and reinstate with new inode */
3409 md_set_lock_data(sbi->ll_md_exp, lockh, inode, NULL);
3410
3411 lock_res_and_lock(lock);
3412 lvb_ready = ldlm_is_lvb_ready(lock);
3413 unlock_res_and_lock(lock);
3414 /* checking lvb_ready is racy but this is okay. The worst case is
3415 * that multi processes may configure the file on the same time.
3416 */
3417 if (lvb_ready) {
3418 rc = 0;
3419 goto out;
3420 }
3421
3422 rc = ll_layout_fetch(inode, lock);
3423 if (rc < 0)
3424 goto out;
3425
3426 /* for layout lock, lmm is returned in lock's lvb.
3427 * lvb_data is immutable if the lock is held so it's safe to access it
3428 * without res lock.
3429 *
3430 * set layout to file. Unlikely this will fail as old layout was
3431 * surely eliminated
3432 */
3433 memset(&conf, 0, sizeof(conf));
3434 conf.coc_opc = OBJECT_CONF_SET;
3435 conf.coc_inode = inode;
3436 conf.coc_lock = lock;
3437 conf.u.coc_layout.lb_buf = lock->l_lvb_data;
3438 conf.u.coc_layout.lb_len = lock->l_lvb_len;
3439 rc = ll_layout_conf(inode, &conf);
3440
3441 /* refresh layout failed, need to wait */
3442 wait_layout = rc == -EBUSY;
3443
3444 out:
3445 LDLM_LOCK_PUT(lock);
3446 ldlm_lock_decref(lockh, mode);
3447
3448 /* wait for IO to complete if it's still being used. */
3449 if (wait_layout) {
3450 CDEBUG(D_INODE, "%s: " DFID "(%p) wait for layout reconf\n",
3451 ll_get_fsname(inode->i_sb, NULL, 0),
3452 PFID(&lli->lli_fid), inode);
3453
3454 memset(&conf, 0, sizeof(conf));
3455 conf.coc_opc = OBJECT_CONF_WAIT;
3456 conf.coc_inode = inode;
3457 rc = ll_layout_conf(inode, &conf);
3458 if (rc == 0)
3459 rc = -EAGAIN;
3460
3461 CDEBUG(D_INODE,
3462 "%s: file=" DFID " waiting layout return: %d.\n",
3463 ll_get_fsname(inode->i_sb, NULL, 0),
3464 PFID(&lli->lli_fid), rc);
3465 }
3466 return rc;
3467 }
3468
3469 static int ll_layout_refresh_locked(struct inode *inode)
3470 {
3471 struct ll_inode_info *lli = ll_i2info(inode);
3472 struct ll_sb_info *sbi = ll_i2sbi(inode);
3473 struct md_op_data *op_data;
3474 struct lookup_intent it;
3475 struct lustre_handle lockh;
3476 enum ldlm_mode mode;
3477 struct ldlm_enqueue_info einfo = {
3478 .ei_type = LDLM_IBITS,
3479 .ei_mode = LCK_CR,
3480 .ei_cb_bl = &ll_md_blocking_ast,
3481 .ei_cb_cp = &ldlm_completion_ast,
3482 };
3483 int rc;
3484
3485 again:
3486 /* mostly layout lock is caching on the local side, so try to match
3487 * it before grabbing layout lock mutex.
3488 */
3489 mode = ll_take_md_lock(inode, MDS_INODELOCK_LAYOUT, &lockh, 0,
3490 LCK_CR | LCK_CW | LCK_PR | LCK_PW);
3491 if (mode != 0) { /* hit cached lock */
3492 rc = ll_layout_lock_set(&lockh, mode, inode);
3493 if (rc == -EAGAIN)
3494 goto again;
3495 return rc;
3496 }
3497
3498 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL,
3499 0, 0, LUSTRE_OPC_ANY, NULL);
3500 if (IS_ERR(op_data))
3501 return PTR_ERR(op_data);
3502
3503 /* have to enqueue one */
3504 memset(&it, 0, sizeof(it));
3505 it.it_op = IT_LAYOUT;
3506 lockh.cookie = 0ULL;
3507
3508 LDLM_DEBUG_NOLOCK("%s: requeue layout lock for file " DFID "(%p)",
3509 ll_get_fsname(inode->i_sb, NULL, 0),
3510 PFID(&lli->lli_fid), inode);
3511
3512 rc = md_enqueue(sbi->ll_md_exp, &einfo, NULL, &it, op_data, &lockh, 0);
3513 ptlrpc_req_finished(it.it_request);
3514 it.it_request = NULL;
3515
3516 ll_finish_md_op_data(op_data);
3517
3518 mode = it.it_lock_mode;
3519 it.it_lock_mode = 0;
3520 ll_intent_drop_lock(&it);
3521
3522 if (rc == 0) {
3523 /* set lock data in case this is a new lock */
3524 ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL);
3525 rc = ll_layout_lock_set(&lockh, mode, inode);
3526 if (rc == -EAGAIN)
3527 goto again;
3528 }
3529
3530 return rc;
3531 }
3532
3533 /**
3534 * This function checks if there exists a LAYOUT lock on the client side,
3535 * or enqueues it if it doesn't have one in cache.
3536 *
3537 * This function will not hold layout lock so it may be revoked any time after
3538 * this function returns. Any operations depend on layout should be redone
3539 * in that case.
3540 *
3541 * This function should be called before lov_io_init() to get an uptodate
3542 * layout version, the caller should save the version number and after IO
3543 * is finished, this function should be called again to verify that layout
3544 * is not changed during IO time.
3545 */
3546 int ll_layout_refresh(struct inode *inode, __u32 *gen)
3547 {
3548 struct ll_inode_info *lli = ll_i2info(inode);
3549 struct ll_sb_info *sbi = ll_i2sbi(inode);
3550 int rc;
3551
3552 *gen = ll_layout_version_get(lli);
3553 if (!(sbi->ll_flags & LL_SBI_LAYOUT_LOCK) || *gen != CL_LAYOUT_GEN_NONE)
3554 return 0;
3555
3556 /* sanity checks */
3557 LASSERT(fid_is_sane(ll_inode2fid(inode)));
3558 LASSERT(S_ISREG(inode->i_mode));
3559
3560 /* take layout lock mutex to enqueue layout lock exclusively. */
3561 mutex_lock(&lli->lli_layout_mutex);
3562
3563 rc = ll_layout_refresh_locked(inode);
3564 if (rc < 0)
3565 goto out;
3566
3567 *gen = ll_layout_version_get(lli);
3568 out:
3569 mutex_unlock(&lli->lli_layout_mutex);
3570
3571 return rc;
3572 }
3573
3574 /**
3575 * This function send a restore request to the MDT
3576 */
3577 int ll_layout_restore(struct inode *inode, loff_t offset, __u64 length)
3578 {
3579 struct hsm_user_request *hur;
3580 int len, rc;
3581
3582 len = sizeof(struct hsm_user_request) +
3583 sizeof(struct hsm_user_item);
3584 hur = kzalloc(len, GFP_NOFS);
3585 if (!hur)
3586 return -ENOMEM;
3587
3588 hur->hur_request.hr_action = HUA_RESTORE;
3589 hur->hur_request.hr_archive_id = 0;
3590 hur->hur_request.hr_flags = 0;
3591 memcpy(&hur->hur_user_item[0].hui_fid, &ll_i2info(inode)->lli_fid,
3592 sizeof(hur->hur_user_item[0].hui_fid));
3593 hur->hur_user_item[0].hui_extent.offset = offset;
3594 hur->hur_user_item[0].hui_extent.length = length;
3595 hur->hur_request.hr_itemcount = 1;
3596 rc = obd_iocontrol(LL_IOC_HSM_REQUEST, ll_i2sbi(inode)->ll_md_exp,
3597 len, hur, NULL);
3598 kfree(hur);
3599 return rc;
3600 }
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