4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
34 * Author: Peter Braam <braam@clusterfs.com>
35 * Author: Phil Schwan <phil@clusterfs.com>
36 * Author: Andreas Dilger <adilger@clusterfs.com>
39 #define DEBUG_SUBSYSTEM S_LLITE
40 #include <lustre_dlm.h>
41 #include <linux/pagemap.h>
42 #include <linux/file.h>
43 #include <linux/sched.h>
44 #include <linux/user_namespace.h>
45 #ifdef HAVE_UIDGID_HEADER
46 # include <linux/uidgid.h>
48 #include <lustre/ll_fiemap.h>
50 #include <lustre_ioctl.h>
51 #include <lustre_swab.h>
53 #include "cl_object.h"
54 #include "llite_internal.h"
55 #include "vvp_internal.h"
58 ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg);
60 static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
63 static enum llioc_iter
64 ll_iocontrol_call(struct inode *inode, struct file *file,
65 unsigned int cmd, unsigned long arg, int *rcp);
67 static struct ll_file_data *ll_file_data_get(void)
69 struct ll_file_data *fd;
71 OBD_SLAB_ALLOC_PTR_GFP(fd, ll_file_data_slab, GFP_NOFS);
75 fd->fd_write_failed = false;
80 static void ll_file_data_put(struct ll_file_data *fd)
83 OBD_SLAB_FREE_PTR(fd, ll_file_data_slab);
87 * Packs all the attributes into @op_data for the CLOSE rpc.
89 static void ll_prepare_close(struct inode *inode, struct md_op_data *op_data,
90 struct obd_client_handle *och)
94 ll_prep_md_op_data(op_data, inode, NULL, NULL,
95 0, 0, LUSTRE_OPC_ANY, NULL);
97 op_data->op_attr.ia_mode = inode->i_mode;
98 op_data->op_attr.ia_atime = inode->i_atime;
99 op_data->op_attr.ia_mtime = inode->i_mtime;
100 op_data->op_attr.ia_ctime = inode->i_ctime;
101 op_data->op_attr.ia_size = i_size_read(inode);
102 op_data->op_attr.ia_valid |= ATTR_MODE | ATTR_ATIME | ATTR_ATIME_SET |
103 ATTR_MTIME | ATTR_MTIME_SET |
104 ATTR_CTIME | ATTR_CTIME_SET;
105 op_data->op_attr_blocks = inode->i_blocks;
106 op_data->op_attr_flags = ll_inode_to_ext_flags(inode->i_flags);
107 op_data->op_handle = och->och_fh;
109 if (och->och_flags & FMODE_WRITE &&
110 ll_file_test_and_clear_flag(ll_i2info(inode), LLIF_DATA_MODIFIED))
111 /* For HSM: if inode data has been modified, pack it so that
112 * MDT can set data dirty flag in the archive. */
113 op_data->op_bias |= MDS_DATA_MODIFIED;
119 * Perform a close, possibly with a bias.
120 * The meaning of "data" depends on the value of "bias".
122 * If \a bias is MDS_HSM_RELEASE then \a data is a pointer to the data version.
123 * If \a bias is MDS_CLOSE_LAYOUT_SWAP then \a data is a pointer to the inode to
126 static int ll_close_inode_openhandle(struct inode *inode,
127 struct obd_client_handle *och,
128 enum mds_op_bias bias, void *data)
130 struct obd_export *md_exp = ll_i2mdexp(inode);
131 const struct ll_inode_info *lli = ll_i2info(inode);
132 struct md_op_data *op_data;
133 struct ptlrpc_request *req = NULL;
137 if (class_exp2obd(md_exp) == NULL) {
138 CERROR("%s: invalid MDC connection handle closing "DFID"\n",
139 ll_get_fsname(inode->i_sb, NULL, 0),
140 PFID(&lli->lli_fid));
144 OBD_ALLOC_PTR(op_data);
145 /* We leak openhandle and request here on error, but not much to be
146 * done in OOM case since app won't retry close on error either. */
148 GOTO(out, rc = -ENOMEM);
150 ll_prepare_close(inode, op_data, och);
152 case MDS_CLOSE_LAYOUT_SWAP:
153 LASSERT(data != NULL);
154 op_data->op_bias |= MDS_CLOSE_LAYOUT_SWAP;
155 op_data->op_data_version = 0;
156 op_data->op_lease_handle = och->och_lease_handle;
157 op_data->op_fid2 = *ll_inode2fid(data);
160 case MDS_HSM_RELEASE:
161 LASSERT(data != NULL);
162 op_data->op_bias |= MDS_HSM_RELEASE;
163 op_data->op_data_version = *(__u64 *)data;
164 op_data->op_lease_handle = och->och_lease_handle;
165 op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
169 LASSERT(data == NULL);
173 rc = md_close(md_exp, op_data, och->och_mod, &req);
174 if (rc != 0 && rc != -EINTR)
175 CERROR("%s: inode "DFID" mdc close failed: rc = %d\n",
176 md_exp->exp_obd->obd_name, PFID(&lli->lli_fid), rc);
179 op_data->op_bias & (MDS_HSM_RELEASE | MDS_CLOSE_LAYOUT_SWAP)) {
180 struct mdt_body *body;
182 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
183 if (!(body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED))
187 ll_finish_md_op_data(op_data);
191 md_clear_open_replay_data(md_exp, och);
192 och->och_fh.cookie = DEAD_HANDLE_MAGIC;
195 ptlrpc_req_finished(req); /* This is close request */
199 int ll_md_real_close(struct inode *inode, fmode_t fmode)
201 struct ll_inode_info *lli = ll_i2info(inode);
202 struct obd_client_handle **och_p;
203 struct obd_client_handle *och;
208 if (fmode & FMODE_WRITE) {
209 och_p = &lli->lli_mds_write_och;
210 och_usecount = &lli->lli_open_fd_write_count;
211 } else if (fmode & FMODE_EXEC) {
212 och_p = &lli->lli_mds_exec_och;
213 och_usecount = &lli->lli_open_fd_exec_count;
215 LASSERT(fmode & FMODE_READ);
216 och_p = &lli->lli_mds_read_och;
217 och_usecount = &lli->lli_open_fd_read_count;
220 mutex_lock(&lli->lli_och_mutex);
221 if (*och_usecount > 0) {
222 /* There are still users of this handle, so skip
224 mutex_unlock(&lli->lli_och_mutex);
230 mutex_unlock(&lli->lli_och_mutex);
233 /* There might be a race and this handle may already
235 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
241 static int ll_md_close(struct inode *inode, struct file *file)
243 union ldlm_policy_data policy = {
244 .l_inodebits = { MDS_INODELOCK_OPEN },
246 __u64 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
247 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
248 struct ll_inode_info *lli = ll_i2info(inode);
249 struct lustre_handle lockh;
250 enum ldlm_mode lockmode;
254 /* clear group lock, if present */
255 if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED))
256 ll_put_grouplock(inode, file, fd->fd_grouplock.lg_gid);
258 if (fd->fd_lease_och != NULL) {
261 /* Usually the lease is not released when the
262 * application crashed, we need to release here. */
263 rc = ll_lease_close(fd->fd_lease_och, inode, &lease_broken);
264 CDEBUG(rc ? D_ERROR : D_INODE, "Clean up lease "DFID" %d/%d\n",
265 PFID(&lli->lli_fid), rc, lease_broken);
267 fd->fd_lease_och = NULL;
270 if (fd->fd_och != NULL) {
271 rc = ll_close_inode_openhandle(inode, fd->fd_och, 0, NULL);
276 /* Let's see if we have good enough OPEN lock on the file and if
277 we can skip talking to MDS */
278 mutex_lock(&lli->lli_och_mutex);
279 if (fd->fd_omode & FMODE_WRITE) {
281 LASSERT(lli->lli_open_fd_write_count);
282 lli->lli_open_fd_write_count--;
283 } else if (fd->fd_omode & FMODE_EXEC) {
285 LASSERT(lli->lli_open_fd_exec_count);
286 lli->lli_open_fd_exec_count--;
289 LASSERT(lli->lli_open_fd_read_count);
290 lli->lli_open_fd_read_count--;
292 mutex_unlock(&lli->lli_och_mutex);
294 if (!md_lock_match(ll_i2mdexp(inode), flags, ll_inode2fid(inode),
295 LDLM_IBITS, &policy, lockmode, &lockh))
296 rc = ll_md_real_close(inode, fd->fd_omode);
299 LUSTRE_FPRIVATE(file) = NULL;
300 ll_file_data_put(fd);
305 /* While this returns an error code, fput() the caller does not, so we need
306 * to make every effort to clean up all of our state here. Also, applications
307 * rarely check close errors and even if an error is returned they will not
308 * re-try the close call.
310 int ll_file_release(struct inode *inode, struct file *file)
312 struct ll_file_data *fd;
313 struct ll_sb_info *sbi = ll_i2sbi(inode);
314 struct ll_inode_info *lli = ll_i2info(inode);
318 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
319 PFID(ll_inode2fid(inode)), inode);
321 if (inode->i_sb->s_root != file_dentry(file))
322 ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
323 fd = LUSTRE_FPRIVATE(file);
326 /* The last ref on @file, maybe not the the owner pid of statahead,
327 * because parent and child process can share the same file handle. */
328 if (S_ISDIR(inode->i_mode) && lli->lli_opendir_key == fd)
329 ll_deauthorize_statahead(inode, fd);
331 if (inode->i_sb->s_root == file_dentry(file)) {
332 LUSTRE_FPRIVATE(file) = NULL;
333 ll_file_data_put(fd);
337 if (!S_ISDIR(inode->i_mode)) {
338 if (lli->lli_clob != NULL)
339 lov_read_and_clear_async_rc(lli->lli_clob);
340 lli->lli_async_rc = 0;
343 rc = ll_md_close(inode, file);
345 if (CFS_FAIL_TIMEOUT_MS(OBD_FAIL_PTLRPC_DUMP_LOG, cfs_fail_val))
346 libcfs_debug_dumplog();
351 static int ll_intent_file_open(struct file *file, void *lmm, int lmmsize,
352 struct lookup_intent *itp)
354 struct dentry *de = file_dentry(file);
355 struct ll_sb_info *sbi = ll_i2sbi(de->d_inode);
356 struct dentry *parent = de->d_parent;
357 const char *name = NULL;
359 struct md_op_data *op_data;
360 struct ptlrpc_request *req = NULL;
364 LASSERT(parent != NULL);
365 LASSERT(itp->it_flags & MDS_OPEN_BY_FID);
367 /* if server supports open-by-fid, or file name is invalid, don't pack
368 * name in open request */
369 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_OPEN_BY_FID) &&
370 lu_name_is_valid_2(de->d_name.name, de->d_name.len)) {
371 name = de->d_name.name;
372 len = de->d_name.len;
375 op_data = ll_prep_md_op_data(NULL, parent->d_inode, de->d_inode,
376 name, len, 0, LUSTRE_OPC_ANY, NULL);
378 RETURN(PTR_ERR(op_data));
379 op_data->op_data = lmm;
380 op_data->op_data_size = lmmsize;
382 rc = md_intent_lock(sbi->ll_md_exp, op_data, itp, &req,
383 &ll_md_blocking_ast, 0);
384 ll_finish_md_op_data(op_data);
386 /* reason for keep own exit path - don`t flood log
387 * with messages with -ESTALE errors.
389 if (!it_disposition(itp, DISP_OPEN_OPEN) ||
390 it_open_error(DISP_OPEN_OPEN, itp))
392 ll_release_openhandle(de, itp);
396 if (it_disposition(itp, DISP_LOOKUP_NEG))
397 GOTO(out, rc = -ENOENT);
399 if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) {
400 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp);
401 CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc);
405 rc = ll_prep_inode(&de->d_inode, req, NULL, itp);
406 if (!rc && itp->it_lock_mode)
407 ll_set_lock_data(sbi->ll_md_exp, de->d_inode, itp, NULL);
410 ptlrpc_req_finished(req);
411 ll_intent_drop_lock(itp);
413 /* We did open by fid, but by the time we got to the server,
414 * the object disappeared. If this is a create, we cannot really
415 * tell the userspace that the file it was trying to create
416 * does not exist. Instead let's return -ESTALE, and the VFS will
417 * retry the create with LOOKUP_REVAL that we are going to catch
418 * in ll_revalidate_dentry() and use lookup then.
420 if (rc == -ENOENT && itp->it_op & IT_CREAT)
426 static int ll_och_fill(struct obd_export *md_exp, struct lookup_intent *it,
427 struct obd_client_handle *och)
429 struct mdt_body *body;
431 body = req_capsule_server_get(&it->it_request->rq_pill, &RMF_MDT_BODY);
432 och->och_fh = body->mbo_handle;
433 och->och_fid = body->mbo_fid1;
434 och->och_lease_handle.cookie = it->it_lock_handle;
435 och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
436 och->och_flags = it->it_flags;
438 return md_set_open_replay_data(md_exp, och, it);
441 static int ll_local_open(struct file *file, struct lookup_intent *it,
442 struct ll_file_data *fd, struct obd_client_handle *och)
444 struct inode *inode = file_inode(file);
447 LASSERT(!LUSTRE_FPRIVATE(file));
454 rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och);
459 LUSTRE_FPRIVATE(file) = fd;
460 ll_readahead_init(inode, &fd->fd_ras);
461 fd->fd_omode = it->it_flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
463 /* ll_cl_context initialize */
464 rwlock_init(&fd->fd_lock);
465 INIT_LIST_HEAD(&fd->fd_lccs);
470 /* Open a file, and (for the very first open) create objects on the OSTs at
471 * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object
472 * creation or open until ll_lov_setstripe() ioctl is called.
474 * If we already have the stripe MD locally then we don't request it in
475 * md_open(), by passing a lmm_size = 0.
477 * It is up to the application to ensure no other processes open this file
478 * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
479 * used. We might be able to avoid races of that sort by getting lli_open_sem
480 * before returning in the O_LOV_DELAY_CREATE case and dropping it here
481 * or in ll_file_release(), but I'm not sure that is desirable/necessary.
483 int ll_file_open(struct inode *inode, struct file *file)
485 struct ll_inode_info *lli = ll_i2info(inode);
486 struct lookup_intent *it, oit = { .it_op = IT_OPEN,
487 .it_flags = file->f_flags };
488 struct obd_client_handle **och_p = NULL;
489 __u64 *och_usecount = NULL;
490 struct ll_file_data *fd;
494 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), flags %o\n",
495 PFID(ll_inode2fid(inode)), inode, file->f_flags);
497 it = file->private_data; /* XXX: compat macro */
498 file->private_data = NULL; /* prevent ll_local_open assertion */
500 fd = ll_file_data_get();
502 GOTO(out_openerr, rc = -ENOMEM);
505 if (S_ISDIR(inode->i_mode))
506 ll_authorize_statahead(inode, fd);
508 if (inode->i_sb->s_root == file_dentry(file)) {
509 LUSTRE_FPRIVATE(file) = fd;
513 if (!it || !it->it_disposition) {
514 /* Convert f_flags into access mode. We cannot use file->f_mode,
515 * because everything but O_ACCMODE mask was stripped from
517 if ((oit.it_flags + 1) & O_ACCMODE)
519 if (file->f_flags & O_TRUNC)
520 oit.it_flags |= FMODE_WRITE;
522 /* kernel only call f_op->open in dentry_open. filp_open calls
523 * dentry_open after call to open_namei that checks permissions.
524 * Only nfsd_open call dentry_open directly without checking
525 * permissions and because of that this code below is safe. */
526 if (oit.it_flags & (FMODE_WRITE | FMODE_READ))
527 oit.it_flags |= MDS_OPEN_OWNEROVERRIDE;
529 /* We do not want O_EXCL here, presumably we opened the file
530 * already? XXX - NFS implications? */
531 oit.it_flags &= ~O_EXCL;
533 /* bug20584, if "it_flags" contains O_CREAT, the file will be
534 * created if necessary, then "IT_CREAT" should be set to keep
535 * consistent with it */
536 if (oit.it_flags & O_CREAT)
537 oit.it_op |= IT_CREAT;
543 /* Let's see if we have file open on MDS already. */
544 if (it->it_flags & FMODE_WRITE) {
545 och_p = &lli->lli_mds_write_och;
546 och_usecount = &lli->lli_open_fd_write_count;
547 } else if (it->it_flags & FMODE_EXEC) {
548 och_p = &lli->lli_mds_exec_och;
549 och_usecount = &lli->lli_open_fd_exec_count;
551 och_p = &lli->lli_mds_read_och;
552 och_usecount = &lli->lli_open_fd_read_count;
555 mutex_lock(&lli->lli_och_mutex);
556 if (*och_p) { /* Open handle is present */
557 if (it_disposition(it, DISP_OPEN_OPEN)) {
558 /* Well, there's extra open request that we do not need,
559 let's close it somehow. This will decref request. */
560 rc = it_open_error(DISP_OPEN_OPEN, it);
562 mutex_unlock(&lli->lli_och_mutex);
563 GOTO(out_openerr, rc);
566 ll_release_openhandle(file_dentry(file), it);
570 rc = ll_local_open(file, it, fd, NULL);
573 mutex_unlock(&lli->lli_och_mutex);
574 GOTO(out_openerr, rc);
577 LASSERT(*och_usecount == 0);
578 if (!it->it_disposition) {
579 struct ll_dentry_data *ldd = ll_d2d(file->f_path.dentry);
580 /* We cannot just request lock handle now, new ELC code
581 means that one of other OPEN locks for this file
582 could be cancelled, and since blocking ast handler
583 would attempt to grab och_mutex as well, that would
584 result in a deadlock */
585 mutex_unlock(&lli->lli_och_mutex);
587 * Normally called under two situations:
589 * 2. A race/condition on MDS resulting in no open
590 * handle to be returned from LOOKUP|OPEN request,
591 * for example if the target entry was a symlink.
593 * Only fetch MDS_OPEN_LOCK if this is in NFS path,
594 * marked by a bit set in ll_iget_for_nfs. Clear the
595 * bit so that it's not confusing later callers.
597 * NB; when ldd is NULL, it must have come via normal
598 * lookup path only, since ll_iget_for_nfs always calls
601 if (ldd && ldd->lld_nfs_dentry) {
602 ldd->lld_nfs_dentry = 0;
603 it->it_flags |= MDS_OPEN_LOCK;
607 * Always specify MDS_OPEN_BY_FID because we don't want
608 * to get file with different fid.
610 it->it_flags |= MDS_OPEN_BY_FID;
611 rc = ll_intent_file_open(file, NULL, 0, it);
613 GOTO(out_openerr, rc);
617 OBD_ALLOC(*och_p, sizeof (struct obd_client_handle));
619 GOTO(out_och_free, rc = -ENOMEM);
623 /* md_intent_lock() didn't get a request ref if there was an
624 * open error, so don't do cleanup on the request here
626 /* XXX (green): Should not we bail out on any error here, not
627 * just open error? */
628 rc = it_open_error(DISP_OPEN_OPEN, it);
630 GOTO(out_och_free, rc);
632 LASSERTF(it_disposition(it, DISP_ENQ_OPEN_REF),
633 "inode %p: disposition %x, status %d\n", inode,
634 it_disposition(it, ~0), it->it_status);
636 rc = ll_local_open(file, it, fd, *och_p);
638 GOTO(out_och_free, rc);
640 mutex_unlock(&lli->lli_och_mutex);
643 /* Must do this outside lli_och_mutex lock to prevent deadlock where
644 different kind of OPEN lock for this same inode gets cancelled
645 by ldlm_cancel_lru */
646 if (!S_ISREG(inode->i_mode))
647 GOTO(out_och_free, rc);
649 cl_lov_delay_create_clear(&file->f_flags);
650 GOTO(out_och_free, rc);
654 if (och_p && *och_p) {
655 OBD_FREE(*och_p, sizeof (struct obd_client_handle));
656 *och_p = NULL; /* OBD_FREE writes some magic there */
659 mutex_unlock(&lli->lli_och_mutex);
662 if (lli->lli_opendir_key == fd)
663 ll_deauthorize_statahead(inode, fd);
665 ll_file_data_put(fd);
667 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN, 1);
670 if (it && it_disposition(it, DISP_ENQ_OPEN_REF)) {
671 ptlrpc_req_finished(it->it_request);
672 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
678 static int ll_md_blocking_lease_ast(struct ldlm_lock *lock,
679 struct ldlm_lock_desc *desc, void *data, int flag)
682 struct lustre_handle lockh;
686 case LDLM_CB_BLOCKING:
687 ldlm_lock2handle(lock, &lockh);
688 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
690 CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
694 case LDLM_CB_CANCELING:
702 * When setting a lease on a file, we take ownership of the lli_mds_*_och
703 * and save it as fd->fd_och so as to force client to reopen the file even
704 * if it has an open lock in cache already.
706 static int ll_lease_och_acquire(struct inode *inode, struct file *file,
707 struct lustre_handle *old_handle)
709 struct ll_inode_info *lli = ll_i2info(inode);
710 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
711 struct obd_client_handle **och_p;
716 /* Get the openhandle of the file */
717 mutex_lock(&lli->lli_och_mutex);
718 if (fd->fd_lease_och != NULL)
719 GOTO(out_unlock, rc = -EBUSY);
721 if (fd->fd_och == NULL) {
722 if (file->f_mode & FMODE_WRITE) {
723 LASSERT(lli->lli_mds_write_och != NULL);
724 och_p = &lli->lli_mds_write_och;
725 och_usecount = &lli->lli_open_fd_write_count;
727 LASSERT(lli->lli_mds_read_och != NULL);
728 och_p = &lli->lli_mds_read_och;
729 och_usecount = &lli->lli_open_fd_read_count;
732 if (*och_usecount > 1)
733 GOTO(out_unlock, rc = -EBUSY);
740 *old_handle = fd->fd_och->och_fh;
744 mutex_unlock(&lli->lli_och_mutex);
749 * Release ownership on lli_mds_*_och when putting back a file lease.
751 static int ll_lease_och_release(struct inode *inode, struct file *file)
753 struct ll_inode_info *lli = ll_i2info(inode);
754 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
755 struct obd_client_handle **och_p;
756 struct obd_client_handle *old_och = NULL;
761 mutex_lock(&lli->lli_och_mutex);
762 if (file->f_mode & FMODE_WRITE) {
763 och_p = &lli->lli_mds_write_och;
764 och_usecount = &lli->lli_open_fd_write_count;
766 och_p = &lli->lli_mds_read_och;
767 och_usecount = &lli->lli_open_fd_read_count;
770 /* The file may have been open by another process (broken lease) so
771 * *och_p is not NULL. In this case we should simply increase usecount
774 if (*och_p != NULL) {
775 old_och = fd->fd_och;
782 mutex_unlock(&lli->lli_och_mutex);
785 rc = ll_close_inode_openhandle(inode, old_och, 0, NULL);
791 * Acquire a lease and open the file.
793 static struct obd_client_handle *
794 ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
797 struct lookup_intent it = { .it_op = IT_OPEN };
798 struct ll_sb_info *sbi = ll_i2sbi(inode);
799 struct md_op_data *op_data;
800 struct ptlrpc_request *req = NULL;
801 struct lustre_handle old_handle = { 0 };
802 struct obd_client_handle *och = NULL;
807 if (fmode != FMODE_WRITE && fmode != FMODE_READ)
808 RETURN(ERR_PTR(-EINVAL));
811 if (!(fmode & file->f_mode) || (file->f_mode & FMODE_EXEC))
812 RETURN(ERR_PTR(-EPERM));
814 rc = ll_lease_och_acquire(inode, file, &old_handle);
821 RETURN(ERR_PTR(-ENOMEM));
823 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
824 LUSTRE_OPC_ANY, NULL);
826 GOTO(out, rc = PTR_ERR(op_data));
828 /* To tell the MDT this openhandle is from the same owner */
829 op_data->op_handle = old_handle;
831 it.it_flags = fmode | open_flags;
832 it.it_flags |= MDS_OPEN_LOCK | MDS_OPEN_BY_FID | MDS_OPEN_LEASE;
833 rc = md_intent_lock(sbi->ll_md_exp, op_data, &it, &req,
834 &ll_md_blocking_lease_ast,
835 /* LDLM_FL_NO_LRU: To not put the lease lock into LRU list, otherwise
836 * it can be cancelled which may mislead applications that the lease is
838 * LDLM_FL_EXCL: Set this flag so that it won't be matched by normal
839 * open in ll_md_blocking_ast(). Otherwise as ll_md_blocking_lease_ast
840 * doesn't deal with openhandle, so normal openhandle will be leaked. */
841 LDLM_FL_NO_LRU | LDLM_FL_EXCL);
842 ll_finish_md_op_data(op_data);
843 ptlrpc_req_finished(req);
845 GOTO(out_release_it, rc);
847 if (it_disposition(&it, DISP_LOOKUP_NEG))
848 GOTO(out_release_it, rc = -ENOENT);
850 rc = it_open_error(DISP_OPEN_OPEN, &it);
852 GOTO(out_release_it, rc);
854 LASSERT(it_disposition(&it, DISP_ENQ_OPEN_REF));
855 ll_och_fill(sbi->ll_md_exp, &it, och);
857 if (!it_disposition(&it, DISP_OPEN_LEASE)) /* old server? */
858 GOTO(out_close, rc = -EOPNOTSUPP);
860 /* already get lease, handle lease lock */
861 ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL);
862 if (it.it_lock_mode == 0 ||
863 it.it_lock_bits != MDS_INODELOCK_OPEN) {
864 /* open lock must return for lease */
865 CERROR(DFID "lease granted but no open lock, %d/%llu.\n",
866 PFID(ll_inode2fid(inode)), it.it_lock_mode,
868 GOTO(out_close, rc = -EPROTO);
871 ll_intent_release(&it);
875 /* Cancel open lock */
876 if (it.it_lock_mode != 0) {
877 ldlm_lock_decref_and_cancel(&och->och_lease_handle,
880 och->och_lease_handle.cookie = 0ULL;
882 rc2 = ll_close_inode_openhandle(inode, och, 0, NULL);
884 CERROR("%s: error closing file "DFID": %d\n",
885 ll_get_fsname(inode->i_sb, NULL, 0),
886 PFID(&ll_i2info(inode)->lli_fid), rc2);
887 och = NULL; /* och has been freed in ll_close_inode_openhandle() */
889 ll_intent_release(&it);
897 * Check whether a layout swap can be done between two inodes.
899 * \param[in] inode1 First inode to check
900 * \param[in] inode2 Second inode to check
902 * \retval 0 on success, layout swap can be performed between both inodes
903 * \retval negative error code if requirements are not met
905 static int ll_check_swap_layouts_validity(struct inode *inode1,
906 struct inode *inode2)
908 if (!S_ISREG(inode1->i_mode) || !S_ISREG(inode2->i_mode))
911 if (inode_permission(inode1, MAY_WRITE) ||
912 inode_permission(inode2, MAY_WRITE))
915 if (inode1->i_sb != inode2->i_sb)
921 static int ll_swap_layouts_close(struct obd_client_handle *och,
922 struct inode *inode, struct inode *inode2)
924 const struct lu_fid *fid1 = ll_inode2fid(inode);
925 const struct lu_fid *fid2;
929 CDEBUG(D_INODE, "%s: biased close of file "DFID"\n",
930 ll_get_fsname(inode->i_sb, NULL, 0), PFID(fid1));
932 rc = ll_check_swap_layouts_validity(inode, inode2);
934 GOTO(out_free_och, rc);
936 /* We now know that inode2 is a lustre inode */
937 fid2 = ll_inode2fid(inode2);
939 rc = lu_fid_cmp(fid1, fid2);
941 GOTO(out_free_och, rc = -EINVAL);
943 /* Close the file and swap layouts between inode & inode2.
944 * NB: lease lock handle is released in mdc_close_layout_swap_pack()
945 * because we still need it to pack l_remote_handle to MDT. */
946 rc = ll_close_inode_openhandle(inode, och, MDS_CLOSE_LAYOUT_SWAP,
949 och = NULL; /* freed in ll_close_inode_openhandle() */
959 * Release lease and close the file.
960 * It will check if the lease has ever broken.
962 static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
965 struct ldlm_lock *lock;
966 bool cancelled = true;
970 lock = ldlm_handle2lock(&och->och_lease_handle);
972 lock_res_and_lock(lock);
973 cancelled = ldlm_is_cancel(lock);
974 unlock_res_and_lock(lock);
978 CDEBUG(D_INODE, "lease for "DFID" broken? %d\n",
979 PFID(&ll_i2info(inode)->lli_fid), cancelled);
982 ldlm_cli_cancel(&och->och_lease_handle, 0);
984 if (lease_broken != NULL)
985 *lease_broken = cancelled;
987 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
991 int ll_merge_attr(const struct lu_env *env, struct inode *inode)
993 struct ll_inode_info *lli = ll_i2info(inode);
994 struct cl_object *obj = lli->lli_clob;
995 struct cl_attr *attr = vvp_env_thread_attr(env);
1003 ll_inode_size_lock(inode);
1005 /* Merge timestamps the most recently obtained from MDS with
1006 * timestamps obtained from OSTs.
1008 * Do not overwrite atime of inode because it may be refreshed
1009 * by file_accessed() function. If the read was served by cache
1010 * data, there is no RPC to be sent so that atime may not be
1011 * transferred to OSTs at all. MDT only updates atime at close time
1012 * if it's at least 'mdd.*.atime_diff' older.
1013 * All in all, the atime in Lustre does not strictly comply with
1014 * POSIX. Solving this problem needs to send an RPC to MDT for each
1015 * read, this will hurt performance. */
1016 if (LTIME_S(inode->i_atime) < lli->lli_atime || lli->lli_update_atime) {
1017 LTIME_S(inode->i_atime) = lli->lli_atime;
1018 lli->lli_update_atime = 0;
1020 LTIME_S(inode->i_mtime) = lli->lli_mtime;
1021 LTIME_S(inode->i_ctime) = lli->lli_ctime;
1023 atime = LTIME_S(inode->i_atime);
1024 mtime = LTIME_S(inode->i_mtime);
1025 ctime = LTIME_S(inode->i_ctime);
1027 cl_object_attr_lock(obj);
1028 rc = cl_object_attr_get(env, obj, attr);
1029 cl_object_attr_unlock(obj);
1032 GOTO(out_size_unlock, rc);
1034 if (atime < attr->cat_atime)
1035 atime = attr->cat_atime;
1037 if (ctime < attr->cat_ctime)
1038 ctime = attr->cat_ctime;
1040 if (mtime < attr->cat_mtime)
1041 mtime = attr->cat_mtime;
1043 CDEBUG(D_VFSTRACE, DFID" updating i_size %llu\n",
1044 PFID(&lli->lli_fid), attr->cat_size);
1046 i_size_write(inode, attr->cat_size);
1047 inode->i_blocks = attr->cat_blocks;
1049 LTIME_S(inode->i_atime) = atime;
1050 LTIME_S(inode->i_mtime) = mtime;
1051 LTIME_S(inode->i_ctime) = ctime;
1054 ll_inode_size_unlock(inode);
1059 static bool file_is_noatime(const struct file *file)
1061 const struct vfsmount *mnt = file->f_path.mnt;
1062 const struct inode *inode = file_inode((struct file *)file);
1064 /* Adapted from file_accessed() and touch_atime().*/
1065 if (file->f_flags & O_NOATIME)
1068 if (inode->i_flags & S_NOATIME)
1071 if (IS_NOATIME(inode))
1074 if (mnt->mnt_flags & (MNT_NOATIME | MNT_READONLY))
1077 if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
1080 if ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))
1086 static void ll_io_init(struct cl_io *io, const struct file *file, int write)
1088 struct inode *inode = file_inode((struct file *)file);
1090 io->u.ci_rw.crw_nonblock = file->f_flags & O_NONBLOCK;
1092 io->u.ci_wr.wr_append = !!(file->f_flags & O_APPEND);
1093 io->u.ci_wr.wr_sync = file->f_flags & O_SYNC ||
1094 file->f_flags & O_DIRECT ||
1097 io->ci_obj = ll_i2info(inode)->lli_clob;
1098 io->ci_lockreq = CILR_MAYBE;
1099 if (ll_file_nolock(file)) {
1100 io->ci_lockreq = CILR_NEVER;
1101 io->ci_no_srvlock = 1;
1102 } else if (file->f_flags & O_APPEND) {
1103 io->ci_lockreq = CILR_MANDATORY;
1106 io->ci_noatime = file_is_noatime(file);
1110 ll_file_io_generic(const struct lu_env *env, struct vvp_io_args *args,
1111 struct file *file, enum cl_io_type iot,
1112 loff_t *ppos, size_t count)
1114 struct vvp_io *vio = vvp_env_io(env);
1115 struct inode *inode = file_inode(file);
1116 struct ll_inode_info *lli = ll_i2info(inode);
1117 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1121 struct range_lock range;
1125 CDEBUG(D_VFSTRACE, "file: %s, type: %d ppos: %llu, count: %zu\n",
1126 file_dentry(file)->d_name.name, iot, *ppos, count);
1129 io = vvp_env_thread_io(env);
1130 ll_io_init(io, file, iot == CIT_WRITE);
1132 if (cl_io_rw_init(env, io, iot, *ppos, count) == 0) {
1133 bool range_locked = false;
1135 if (file->f_flags & O_APPEND)
1136 range_lock_init(&range, 0, LUSTRE_EOF);
1138 range_lock_init(&range, *ppos, *ppos + count - 1);
1140 vio->vui_fd = LUSTRE_FPRIVATE(file);
1141 vio->vui_io_subtype = args->via_io_subtype;
1143 switch (vio->vui_io_subtype) {
1145 vio->vui_iter = args->u.normal.via_iter;
1146 vio->vui_iocb = args->u.normal.via_iocb;
1147 /* Direct IO reads must also take range lock,
1148 * or multiple reads will try to work on the same pages
1149 * See LU-6227 for details. */
1150 if (((iot == CIT_WRITE) ||
1151 (iot == CIT_READ && (file->f_flags & O_DIRECT))) &&
1152 !(vio->vui_fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
1153 CDEBUG(D_VFSTRACE, "Range lock "RL_FMT"\n",
1155 rc = range_lock(&lli->lli_write_tree, &range);
1159 range_locked = true;
1163 vio->u.splice.vui_pipe = args->u.splice.via_pipe;
1164 vio->u.splice.vui_flags = args->u.splice.via_flags;
1167 CERROR("unknown IO subtype %u\n", vio->vui_io_subtype);
1171 ll_cl_add(file, env, io, LCC_RW);
1172 rc = cl_io_loop(env, io);
1173 ll_cl_remove(file, env);
1176 CDEBUG(D_VFSTRACE, "Range unlock "RL_FMT"\n",
1178 range_unlock(&lli->lli_write_tree, &range);
1181 /* cl_io_rw_init() handled IO */
1185 if (io->ci_nob > 0) {
1186 result += io->ci_nob;
1187 count -= io->ci_nob;
1188 *ppos = io->u.ci_wr.wr.crw_pos; /* for splice */
1190 /* prepare IO restart */
1191 if (count > 0 && args->via_io_subtype == IO_NORMAL)
1192 args->u.normal.via_iter = vio->vui_iter;
1195 cl_io_fini(env, io);
1197 if ((rc == 0 || rc == -ENODATA) && count > 0 && io->ci_need_restart) {
1199 "%s: restart %s from %lld, count:%zu, result: %zd\n",
1200 file_dentry(file)->d_name.name,
1201 iot == CIT_READ ? "read" : "write",
1202 *ppos, count, result);
1206 if (iot == CIT_READ) {
1208 ll_stats_ops_tally(ll_i2sbi(inode),
1209 LPROC_LL_READ_BYTES, result);
1210 } else if (iot == CIT_WRITE) {
1212 ll_stats_ops_tally(ll_i2sbi(inode),
1213 LPROC_LL_WRITE_BYTES, result);
1214 fd->fd_write_failed = false;
1215 } else if (result == 0 && rc == 0) {
1218 fd->fd_write_failed = true;
1220 fd->fd_write_failed = false;
1221 } else if (rc != -ERESTARTSYS) {
1222 fd->fd_write_failed = true;
1226 CDEBUG(D_VFSTRACE, "iot: %d, result: %zd\n", iot, result);
1228 RETURN(result > 0 ? result : rc);
1232 * The purpose of fast read is to overcome per I/O overhead and improve IOPS
1233 * especially for small I/O.
1235 * To serve a read request, CLIO has to create and initialize a cl_io and
1236 * then request DLM lock. This has turned out to have siginificant overhead
1237 * and affects the performance of small I/O dramatically.
1239 * It's not necessary to create a cl_io for each I/O. Under the help of read
1240 * ahead, most of the pages being read are already in memory cache and we can
1241 * read those pages directly because if the pages exist, the corresponding DLM
1242 * lock must exist so that page content must be valid.
1244 * In fast read implementation, the llite speculatively finds and reads pages
1245 * in memory cache. There are three scenarios for fast read:
1246 * - If the page exists and is uptodate, kernel VM will provide the data and
1247 * CLIO won't be intervened;
1248 * - If the page was brought into memory by read ahead, it will be exported
1249 * and read ahead parameters will be updated;
1250 * - Otherwise the page is not in memory, we can't do fast read. Therefore,
1251 * it will go back and invoke normal read, i.e., a cl_io will be created
1252 * and DLM lock will be requested.
1254 * POSIX compliance: posix standard states that read is intended to be atomic.
1255 * Lustre read implementation is in line with Linux kernel read implementation
1256 * and neither of them complies with POSIX standard in this matter. Fast read
1257 * doesn't make the situation worse on single node but it may interleave write
1258 * results from multiple nodes due to short read handling in ll_file_aio_read().
1260 * \param env - lu_env
1261 * \param iocb - kiocb from kernel
1262 * \param iter - user space buffers where the data will be copied
1264 * \retval - number of bytes have been read, or error code if error occurred.
1267 ll_do_fast_read(const struct lu_env *env, struct kiocb *iocb,
1268 struct iov_iter *iter)
1272 if (!ll_sbi_has_fast_read(ll_i2sbi(file_inode(iocb->ki_filp))))
1275 /* NB: we can't do direct IO for fast read because it will need a lock
1276 * to make IO engine happy. */
1277 if (iocb->ki_filp->f_flags & O_DIRECT)
1280 ll_cl_add(iocb->ki_filp, env, NULL, LCC_RW);
1281 result = generic_file_read_iter(iocb, iter);
1282 ll_cl_remove(iocb->ki_filp, env);
1284 /* If the first page is not in cache, generic_file_aio_read() will be
1285 * returned with -ENODATA.
1286 * See corresponding code in ll_readpage(). */
1287 if (result == -ENODATA)
1291 ll_stats_ops_tally(ll_i2sbi(file_inode(iocb->ki_filp)),
1292 LPROC_LL_READ_BYTES, result);
1298 * Read from a file (through the page cache).
1300 static ssize_t ll_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
1303 struct vvp_io_args *args;
1308 env = cl_env_get(&refcheck);
1310 return PTR_ERR(env);
1312 result = ll_do_fast_read(env, iocb, to);
1313 if (result < 0 || iov_iter_count(to) == 0)
1316 args = ll_env_args(env, IO_NORMAL);
1317 args->u.normal.via_iter = to;
1318 args->u.normal.via_iocb = iocb;
1320 rc2 = ll_file_io_generic(env, args, iocb->ki_filp, CIT_READ,
1321 &iocb->ki_pos, iov_iter_count(to));
1324 else if (result == 0)
1328 cl_env_put(env, &refcheck);
1333 * Write to a file (through the page cache).
1335 static ssize_t ll_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
1337 struct vvp_io_args *args;
1342 env = cl_env_get(&refcheck);
1344 return PTR_ERR(env);
1346 args = ll_env_args(env, IO_NORMAL);
1347 args->u.normal.via_iter = from;
1348 args->u.normal.via_iocb = iocb;
1350 result = ll_file_io_generic(env, args, iocb->ki_filp, CIT_WRITE,
1351 &iocb->ki_pos, iov_iter_count(from));
1352 cl_env_put(env, &refcheck);
1356 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
1358 * XXX: exact copy from kernel code (__generic_file_aio_write_nolock)
1360 static int ll_file_get_iov_count(const struct iovec *iov,
1361 unsigned long *nr_segs, size_t *count)
1366 for (seg = 0; seg < *nr_segs; seg++) {
1367 const struct iovec *iv = &iov[seg];
1370 * If any segment has a negative length, or the cumulative
1371 * length ever wraps negative then return -EINVAL.
1374 if (unlikely((ssize_t)(cnt|iv->iov_len) < 0))
1376 if (access_ok(VERIFY_READ, iv->iov_base, iv->iov_len))
1381 cnt -= iv->iov_len; /* This segment is no good */
1388 static ssize_t ll_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
1389 unsigned long nr_segs, loff_t pos)
1396 result = ll_file_get_iov_count(iov, &nr_segs, &iov_count);
1400 # ifdef HAVE_IOV_ITER_INIT_DIRECTION
1401 iov_iter_init(&to, READ, iov, nr_segs, iov_count);
1402 # else /* !HAVE_IOV_ITER_INIT_DIRECTION */
1403 iov_iter_init(&to, iov, nr_segs, iov_count, 0);
1404 # endif /* HAVE_IOV_ITER_INIT_DIRECTION */
1406 result = ll_file_read_iter(iocb, &to);
1411 static ssize_t ll_file_read(struct file *file, char __user *buf, size_t count,
1415 struct iovec iov = { .iov_base = buf, .iov_len = count };
1416 struct kiocb *kiocb;
1421 env = cl_env_get(&refcheck);
1423 RETURN(PTR_ERR(env));
1425 kiocb = &ll_env_info(env)->lti_kiocb;
1426 init_sync_kiocb(kiocb, file);
1427 kiocb->ki_pos = *ppos;
1428 #ifdef HAVE_KIOCB_KI_LEFT
1429 kiocb->ki_left = count;
1430 #elif defined(HAVE_KI_NBYTES)
1431 kiocb->ki_nbytes = count;
1434 result = ll_file_aio_read(kiocb, &iov, 1, kiocb->ki_pos);
1435 *ppos = kiocb->ki_pos;
1437 cl_env_put(env, &refcheck);
1442 * Write to a file (through the page cache).
1445 static ssize_t ll_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
1446 unsigned long nr_segs, loff_t pos)
1448 struct iov_iter from;
1453 result = ll_file_get_iov_count(iov, &nr_segs, &iov_count);
1457 # ifdef HAVE_IOV_ITER_INIT_DIRECTION
1458 iov_iter_init(&from, WRITE, iov, nr_segs, iov_count);
1459 # else /* !HAVE_IOV_ITER_INIT_DIRECTION */
1460 iov_iter_init(&from, iov, nr_segs, iov_count, 0);
1461 # endif /* HAVE_IOV_ITER_INIT_DIRECTION */
1463 result = ll_file_write_iter(iocb, &from);
1468 static ssize_t ll_file_write(struct file *file, const char __user *buf,
1469 size_t count, loff_t *ppos)
1472 struct iovec iov = { .iov_base = (void __user *)buf,
1474 struct kiocb *kiocb;
1479 env = cl_env_get(&refcheck);
1481 RETURN(PTR_ERR(env));
1483 kiocb = &ll_env_info(env)->lti_kiocb;
1484 init_sync_kiocb(kiocb, file);
1485 kiocb->ki_pos = *ppos;
1486 #ifdef HAVE_KIOCB_KI_LEFT
1487 kiocb->ki_left = count;
1488 #elif defined(HAVE_KI_NBYTES)
1489 kiocb->ki_nbytes = count;
1492 result = ll_file_aio_write(kiocb, &iov, 1, kiocb->ki_pos);
1493 *ppos = kiocb->ki_pos;
1495 cl_env_put(env, &refcheck);
1498 #endif /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
1501 * Send file content (through pagecache) somewhere with helper
1503 static ssize_t ll_file_splice_read(struct file *in_file, loff_t *ppos,
1504 struct pipe_inode_info *pipe, size_t count,
1508 struct vvp_io_args *args;
1513 env = cl_env_get(&refcheck);
1515 RETURN(PTR_ERR(env));
1517 args = ll_env_args(env, IO_SPLICE);
1518 args->u.splice.via_pipe = pipe;
1519 args->u.splice.via_flags = flags;
1521 result = ll_file_io_generic(env, args, in_file, CIT_READ, ppos, count);
1522 cl_env_put(env, &refcheck);
1526 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
1527 __u64 flags, struct lov_user_md *lum,
1530 struct lookup_intent oit = {
1532 .it_flags = flags | MDS_OPEN_BY_FID,
1537 ll_inode_size_lock(inode);
1538 rc = ll_intent_file_open(file, lum, lum_size, &oit);
1540 GOTO(out_unlock, rc);
1542 ll_release_openhandle(file_dentry(file), &oit);
1545 ll_inode_size_unlock(inode);
1546 ll_intent_release(&oit);
1547 cl_lov_delay_create_clear(&file->f_flags);
1552 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
1553 struct lov_mds_md **lmmp, int *lmm_size,
1554 struct ptlrpc_request **request)
1556 struct ll_sb_info *sbi = ll_i2sbi(inode);
1557 struct mdt_body *body;
1558 struct lov_mds_md *lmm = NULL;
1559 struct ptlrpc_request *req = NULL;
1560 struct md_op_data *op_data;
1563 rc = ll_get_default_mdsize(sbi, &lmmsize);
1567 op_data = ll_prep_md_op_data(NULL, inode, NULL, filename,
1568 strlen(filename), lmmsize,
1569 LUSTRE_OPC_ANY, NULL);
1570 if (IS_ERR(op_data))
1571 RETURN(PTR_ERR(op_data));
1573 op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
1574 rc = md_getattr_name(sbi->ll_md_exp, op_data, &req);
1575 ll_finish_md_op_data(op_data);
1577 CDEBUG(D_INFO, "md_getattr_name failed "
1578 "on %s: rc %d\n", filename, rc);
1582 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1583 LASSERT(body != NULL); /* checked by mdc_getattr_name */
1585 lmmsize = body->mbo_eadatasize;
1587 if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
1589 GOTO(out, rc = -ENODATA);
1592 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, lmmsize);
1593 LASSERT(lmm != NULL);
1595 if (lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V1) &&
1596 lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V3) &&
1597 lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_COMP_V1))
1598 GOTO(out, rc = -EPROTO);
1601 * This is coming from the MDS, so is probably in
1602 * little endian. We convert it to host endian before
1603 * passing it to userspace.
1605 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC)) {
1608 if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V1) ||
1609 lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V3)) {
1610 stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
1611 if (le32_to_cpu(lmm->lmm_pattern) &
1612 LOV_PATTERN_F_RELEASED)
1616 /* if function called for directory - we should
1617 * avoid swab not existent lsm objects */
1618 if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V1)) {
1619 lustre_swab_lov_user_md_v1(
1620 (struct lov_user_md_v1 *)lmm);
1621 if (S_ISREG(body->mbo_mode))
1622 lustre_swab_lov_user_md_objects(
1623 ((struct lov_user_md_v1 *)lmm)->lmm_objects,
1625 } else if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V3)) {
1626 lustre_swab_lov_user_md_v3(
1627 (struct lov_user_md_v3 *)lmm);
1628 if (S_ISREG(body->mbo_mode))
1629 lustre_swab_lov_user_md_objects(
1630 ((struct lov_user_md_v3 *)lmm)->lmm_objects,
1632 } else if (lmm->lmm_magic ==
1633 cpu_to_le32(LOV_MAGIC_COMP_V1)) {
1634 lustre_swab_lov_comp_md_v1(
1635 (struct lov_comp_md_v1 *)lmm);
1641 *lmm_size = lmmsize;
1646 static int ll_lov_setea(struct inode *inode, struct file *file,
1649 __u64 flags = MDS_OPEN_HAS_OBJS | FMODE_WRITE;
1650 struct lov_user_md *lump;
1651 int lum_size = sizeof(struct lov_user_md) +
1652 sizeof(struct lov_user_ost_data);
1656 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1659 OBD_ALLOC_LARGE(lump, lum_size);
1663 if (copy_from_user(lump, (struct lov_user_md __user *)arg, lum_size))
1664 GOTO(out_lump, rc = -EFAULT);
1666 rc = ll_lov_setstripe_ea_info(inode, file, flags, lump, lum_size);
1669 OBD_FREE_LARGE(lump, lum_size);
1673 static int ll_file_getstripe(struct inode *inode,
1674 struct lov_user_md __user *lum)
1681 env = cl_env_get(&refcheck);
1683 RETURN(PTR_ERR(env));
1685 rc = cl_object_getstripe(env, ll_i2info(inode)->lli_clob, lum);
1686 cl_env_put(env, &refcheck);
1690 static int ll_lov_setstripe(struct inode *inode, struct file *file,
1693 struct lov_user_md __user *lum = (struct lov_user_md __user *)arg;
1694 struct lov_user_md *klum;
1696 __u64 flags = FMODE_WRITE;
1699 rc = ll_copy_user_md(lum, &klum);
1704 rc = ll_lov_setstripe_ea_info(inode, file, flags, klum, lum_size);
1706 OBD_FREE(klum, lum_size);
1711 ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg)
1713 struct ll_inode_info *lli = ll_i2info(inode);
1714 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1715 struct ll_grouplock grouplock;
1720 CWARN("group id for group lock must not be 0\n");
1724 if (ll_file_nolock(file))
1725 RETURN(-EOPNOTSUPP);
1727 spin_lock(&lli->lli_lock);
1728 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
1729 CWARN("group lock already existed with gid %lu\n",
1730 fd->fd_grouplock.lg_gid);
1731 spin_unlock(&lli->lli_lock);
1734 LASSERT(fd->fd_grouplock.lg_lock == NULL);
1735 spin_unlock(&lli->lli_lock);
1737 rc = cl_get_grouplock(ll_i2info(inode)->lli_clob,
1738 arg, (file->f_flags & O_NONBLOCK), &grouplock);
1742 spin_lock(&lli->lli_lock);
1743 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
1744 spin_unlock(&lli->lli_lock);
1745 CERROR("another thread just won the race\n");
1746 cl_put_grouplock(&grouplock);
1750 fd->fd_flags |= LL_FILE_GROUP_LOCKED;
1751 fd->fd_grouplock = grouplock;
1752 spin_unlock(&lli->lli_lock);
1754 CDEBUG(D_INFO, "group lock %lu obtained\n", arg);
1758 static int ll_put_grouplock(struct inode *inode, struct file *file,
1761 struct ll_inode_info *lli = ll_i2info(inode);
1762 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1763 struct ll_grouplock grouplock;
1766 spin_lock(&lli->lli_lock);
1767 if (!(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
1768 spin_unlock(&lli->lli_lock);
1769 CWARN("no group lock held\n");
1773 LASSERT(fd->fd_grouplock.lg_lock != NULL);
1775 if (fd->fd_grouplock.lg_gid != arg) {
1776 CWARN("group lock %lu doesn't match current id %lu\n",
1777 arg, fd->fd_grouplock.lg_gid);
1778 spin_unlock(&lli->lli_lock);
1782 grouplock = fd->fd_grouplock;
1783 memset(&fd->fd_grouplock, 0, sizeof(fd->fd_grouplock));
1784 fd->fd_flags &= ~LL_FILE_GROUP_LOCKED;
1785 spin_unlock(&lli->lli_lock);
1787 cl_put_grouplock(&grouplock);
1788 CDEBUG(D_INFO, "group lock %lu released\n", arg);
1793 * Close inode open handle
1795 * \param dentry [in] dentry which contains the inode
1796 * \param it [in,out] intent which contains open info and result
1799 * \retval <0 failure
1801 int ll_release_openhandle(struct dentry *dentry, struct lookup_intent *it)
1803 struct inode *inode = dentry->d_inode;
1804 struct obd_client_handle *och;
1810 /* Root ? Do nothing. */
1811 if (dentry->d_inode->i_sb->s_root == dentry)
1814 /* No open handle to close? Move away */
1815 if (!it_disposition(it, DISP_OPEN_OPEN))
1818 LASSERT(it_open_error(DISP_OPEN_OPEN, it) == 0);
1820 OBD_ALLOC(och, sizeof(*och));
1822 GOTO(out, rc = -ENOMEM);
1824 ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och);
1826 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
1828 /* this one is in place of ll_file_open */
1829 if (it_disposition(it, DISP_ENQ_OPEN_REF)) {
1830 ptlrpc_req_finished(it->it_request);
1831 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
1837 * Get size for inode for which FIEMAP mapping is requested.
1838 * Make the FIEMAP get_info call and returns the result.
1839 * \param fiemap kernel buffer to hold extens
1840 * \param num_bytes kernel buffer size
1842 static int ll_do_fiemap(struct inode *inode, struct fiemap *fiemap,
1848 struct ll_fiemap_info_key fmkey = { .lfik_name = KEY_FIEMAP, };
1851 /* Checks for fiemap flags */
1852 if (fiemap->fm_flags & ~LUSTRE_FIEMAP_FLAGS_COMPAT) {
1853 fiemap->fm_flags &= ~LUSTRE_FIEMAP_FLAGS_COMPAT;
1857 /* Check for FIEMAP_FLAG_SYNC */
1858 if (fiemap->fm_flags & FIEMAP_FLAG_SYNC) {
1859 rc = filemap_fdatawrite(inode->i_mapping);
1864 env = cl_env_get(&refcheck);
1866 RETURN(PTR_ERR(env));
1868 if (i_size_read(inode) == 0) {
1869 rc = ll_glimpse_size(inode);
1874 fmkey.lfik_oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1875 obdo_from_inode(&fmkey.lfik_oa, inode, OBD_MD_FLSIZE);
1876 obdo_set_parent_fid(&fmkey.lfik_oa, &ll_i2info(inode)->lli_fid);
1878 /* If filesize is 0, then there would be no objects for mapping */
1879 if (fmkey.lfik_oa.o_size == 0) {
1880 fiemap->fm_mapped_extents = 0;
1884 fmkey.lfik_fiemap = *fiemap;
1886 rc = cl_object_fiemap(env, ll_i2info(inode)->lli_clob,
1887 &fmkey, fiemap, &num_bytes);
1889 cl_env_put(env, &refcheck);
1893 int ll_fid2path(struct inode *inode, void __user *arg)
1895 struct obd_export *exp = ll_i2mdexp(inode);
1896 const struct getinfo_fid2path __user *gfin = arg;
1898 struct getinfo_fid2path *gfout;
1904 if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
1905 !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
1908 /* Only need to get the buflen */
1909 if (get_user(pathlen, &gfin->gf_pathlen))
1912 if (pathlen > PATH_MAX)
1915 outsize = sizeof(*gfout) + pathlen;
1916 OBD_ALLOC(gfout, outsize);
1920 if (copy_from_user(gfout, arg, sizeof(*gfout)))
1921 GOTO(gf_free, rc = -EFAULT);
1922 /* append root FID after gfout to let MDT know the root FID so that it
1923 * can lookup the correct path, this is mainly for fileset.
1924 * old server without fileset mount support will ignore this. */
1925 *gfout->gf_u.gf_root_fid = *ll_inode2fid(inode);
1927 /* Call mdc_iocontrol */
1928 rc = obd_iocontrol(OBD_IOC_FID2PATH, exp, outsize, gfout, NULL);
1932 if (copy_to_user(arg, gfout, outsize))
1936 OBD_FREE(gfout, outsize);
1941 * Read the data_version for inode.
1943 * This value is computed using stripe object version on OST.
1944 * Version is computed using server side locking.
1946 * @param flags if do sync on the OST side;
1948 * LL_DV_RD_FLUSH: flush dirty pages, LCK_PR on OSTs
1949 * LL_DV_WR_FLUSH: drop all caching pages, LCK_PW on OSTs
1951 int ll_data_version(struct inode *inode, __u64 *data_version, int flags)
1953 struct cl_object *obj = ll_i2info(inode)->lli_clob;
1961 /* If no file object initialized, we consider its version is 0. */
1967 env = cl_env_get(&refcheck);
1969 RETURN(PTR_ERR(env));
1971 io = vvp_env_thread_io(env);
1973 io->u.ci_data_version.dv_data_version = 0;
1974 io->u.ci_data_version.dv_flags = flags;
1977 if (cl_io_init(env, io, CIT_DATA_VERSION, io->ci_obj) == 0)
1978 result = cl_io_loop(env, io);
1980 result = io->ci_result;
1982 *data_version = io->u.ci_data_version.dv_data_version;
1984 cl_io_fini(env, io);
1986 if (unlikely(io->ci_need_restart))
1989 cl_env_put(env, &refcheck);
1995 * Trigger a HSM release request for the provided inode.
1997 int ll_hsm_release(struct inode *inode)
2000 struct obd_client_handle *och = NULL;
2001 __u64 data_version = 0;
2006 CDEBUG(D_INODE, "%s: Releasing file "DFID".\n",
2007 ll_get_fsname(inode->i_sb, NULL, 0),
2008 PFID(&ll_i2info(inode)->lli_fid));
2010 och = ll_lease_open(inode, NULL, FMODE_WRITE, MDS_OPEN_RELEASE);
2012 GOTO(out, rc = PTR_ERR(och));
2014 /* Grab latest data_version and [am]time values */
2015 rc = ll_data_version(inode, &data_version, LL_DV_WR_FLUSH);
2019 env = cl_env_get(&refcheck);
2021 GOTO(out, rc = PTR_ERR(env));
2023 ll_merge_attr(env, inode);
2024 cl_env_put(env, &refcheck);
2026 /* Release the file.
2027 * NB: lease lock handle is released in mdc_hsm_release_pack() because
2028 * we still need it to pack l_remote_handle to MDT. */
2029 rc = ll_close_inode_openhandle(inode, och, MDS_HSM_RELEASE,
2035 if (och != NULL && !IS_ERR(och)) /* close the file */
2036 ll_lease_close(och, inode, NULL);
2041 struct ll_swap_stack {
2044 struct inode *inode1;
2045 struct inode *inode2;
2050 static int ll_swap_layouts(struct file *file1, struct file *file2,
2051 struct lustre_swap_layouts *lsl)
2053 struct mdc_swap_layouts msl;
2054 struct md_op_data *op_data;
2057 struct ll_swap_stack *llss = NULL;
2060 OBD_ALLOC_PTR(llss);
2064 llss->inode1 = file_inode(file1);
2065 llss->inode2 = file_inode(file2);
2067 rc = ll_check_swap_layouts_validity(llss->inode1, llss->inode2);
2071 /* we use 2 bool because it is easier to swap than 2 bits */
2072 if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV1)
2073 llss->check_dv1 = true;
2075 if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV2)
2076 llss->check_dv2 = true;
2078 /* we cannot use lsl->sl_dvX directly because we may swap them */
2079 llss->dv1 = lsl->sl_dv1;
2080 llss->dv2 = lsl->sl_dv2;
2082 rc = lu_fid_cmp(ll_inode2fid(llss->inode1), ll_inode2fid(llss->inode2));
2083 if (rc == 0) /* same file, done! */
2086 if (rc < 0) { /* sequentialize it */
2087 swap(llss->inode1, llss->inode2);
2089 swap(llss->dv1, llss->dv2);
2090 swap(llss->check_dv1, llss->check_dv2);
2094 if (gid != 0) { /* application asks to flush dirty cache */
2095 rc = ll_get_grouplock(llss->inode1, file1, gid);
2099 rc = ll_get_grouplock(llss->inode2, file2, gid);
2101 ll_put_grouplock(llss->inode1, file1, gid);
2106 /* ultimate check, before swaping the layouts we check if
2107 * dataversion has changed (if requested) */
2108 if (llss->check_dv1) {
2109 rc = ll_data_version(llss->inode1, &dv, 0);
2112 if (dv != llss->dv1)
2113 GOTO(putgl, rc = -EAGAIN);
2116 if (llss->check_dv2) {
2117 rc = ll_data_version(llss->inode2, &dv, 0);
2120 if (dv != llss->dv2)
2121 GOTO(putgl, rc = -EAGAIN);
2124 /* struct md_op_data is used to send the swap args to the mdt
2125 * only flags is missing, so we use struct mdc_swap_layouts
2126 * through the md_op_data->op_data */
2127 /* flags from user space have to be converted before they are send to
2128 * server, no flag is sent today, they are only used on the client */
2131 op_data = ll_prep_md_op_data(NULL, llss->inode1, llss->inode2, NULL, 0,
2132 0, LUSTRE_OPC_ANY, &msl);
2133 if (IS_ERR(op_data))
2134 GOTO(free, rc = PTR_ERR(op_data));
2136 rc = obd_iocontrol(LL_IOC_LOV_SWAP_LAYOUTS, ll_i2mdexp(llss->inode1),
2137 sizeof(*op_data), op_data, NULL);
2138 ll_finish_md_op_data(op_data);
2145 ll_put_grouplock(llss->inode2, file2, gid);
2146 ll_put_grouplock(llss->inode1, file1, gid);
2156 int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss)
2158 struct md_op_data *op_data;
2162 /* Detect out-of range masks */
2163 if ((hss->hss_setmask | hss->hss_clearmask) & ~HSM_FLAGS_MASK)
2166 /* Non-root users are forbidden to set or clear flags which are
2167 * NOT defined in HSM_USER_MASK. */
2168 if (((hss->hss_setmask | hss->hss_clearmask) & ~HSM_USER_MASK) &&
2169 !cfs_capable(CFS_CAP_SYS_ADMIN))
2172 /* Detect out-of range archive id */
2173 if ((hss->hss_valid & HSS_ARCHIVE_ID) &&
2174 (hss->hss_archive_id > LL_HSM_MAX_ARCHIVE))
2177 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2178 LUSTRE_OPC_ANY, hss);
2179 if (IS_ERR(op_data))
2180 RETURN(PTR_ERR(op_data));
2182 rc = obd_iocontrol(LL_IOC_HSM_STATE_SET, ll_i2mdexp(inode),
2183 sizeof(*op_data), op_data, NULL);
2185 ll_finish_md_op_data(op_data);
2190 static int ll_hsm_import(struct inode *inode, struct file *file,
2191 struct hsm_user_import *hui)
2193 struct hsm_state_set *hss = NULL;
2194 struct iattr *attr = NULL;
2198 if (!S_ISREG(inode->i_mode))
2204 GOTO(out, rc = -ENOMEM);
2206 hss->hss_valid = HSS_SETMASK | HSS_ARCHIVE_ID;
2207 hss->hss_archive_id = hui->hui_archive_id;
2208 hss->hss_setmask = HS_ARCHIVED | HS_EXISTS | HS_RELEASED;
2209 rc = ll_hsm_state_set(inode, hss);
2213 OBD_ALLOC_PTR(attr);
2215 GOTO(out, rc = -ENOMEM);
2217 attr->ia_mode = hui->hui_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
2218 attr->ia_mode |= S_IFREG;
2219 attr->ia_uid = make_kuid(&init_user_ns, hui->hui_uid);
2220 attr->ia_gid = make_kgid(&init_user_ns, hui->hui_gid);
2221 attr->ia_size = hui->hui_size;
2222 attr->ia_mtime.tv_sec = hui->hui_mtime;
2223 attr->ia_mtime.tv_nsec = hui->hui_mtime_ns;
2224 attr->ia_atime.tv_sec = hui->hui_atime;
2225 attr->ia_atime.tv_nsec = hui->hui_atime_ns;
2227 attr->ia_valid = ATTR_SIZE | ATTR_MODE | ATTR_FORCE |
2228 ATTR_UID | ATTR_GID |
2229 ATTR_MTIME | ATTR_MTIME_SET |
2230 ATTR_ATIME | ATTR_ATIME_SET;
2234 rc = ll_setattr_raw(file_dentry(file), attr, true);
2238 inode_unlock(inode);
2250 static inline long ll_lease_type_from_fmode(fmode_t fmode)
2252 return ((fmode & FMODE_READ) ? LL_LEASE_RDLCK : 0) |
2253 ((fmode & FMODE_WRITE) ? LL_LEASE_WRLCK : 0);
2256 static int ll_file_futimes_3(struct file *file, const struct ll_futimes_3 *lfu)
2258 struct inode *inode = file_inode(file);
2260 .ia_valid = ATTR_ATIME | ATTR_ATIME_SET |
2261 ATTR_MTIME | ATTR_MTIME_SET |
2262 ATTR_CTIME | ATTR_CTIME_SET,
2264 .tv_sec = lfu->lfu_atime_sec,
2265 .tv_nsec = lfu->lfu_atime_nsec,
2268 .tv_sec = lfu->lfu_mtime_sec,
2269 .tv_nsec = lfu->lfu_mtime_nsec,
2272 .tv_sec = lfu->lfu_ctime_sec,
2273 .tv_nsec = lfu->lfu_ctime_nsec,
2279 if (!capable(CAP_SYS_ADMIN))
2282 if (!S_ISREG(inode->i_mode))
2286 rc = ll_setattr_raw(file_dentry(file), &ia, false);
2287 inode_unlock(inode);
2293 * Give file access advices
2295 * The ladvise interface is similar to Linux fadvise() system call, except it
2296 * forwards the advices directly from Lustre client to server. The server side
2297 * codes will apply appropriate read-ahead and caching techniques for the
2298 * corresponding files.
2300 * A typical workload for ladvise is e.g. a bunch of different clients are
2301 * doing small random reads of a file, so prefetching pages into OSS cache
2302 * with big linear reads before the random IO is a net benefit. Fetching
2303 * all that data into each client cache with fadvise() may not be, due to
2304 * much more data being sent to the client.
2306 static int ll_ladvise(struct inode *inode, struct file *file, __u64 flags,
2307 struct llapi_lu_ladvise *ladvise)
2311 struct cl_ladvise_io *lio;
2316 env = cl_env_get(&refcheck);
2318 RETURN(PTR_ERR(env));
2320 io = vvp_env_thread_io(env);
2321 io->ci_obj = ll_i2info(inode)->lli_clob;
2323 /* initialize parameters for ladvise */
2324 lio = &io->u.ci_ladvise;
2325 lio->li_start = ladvise->lla_start;
2326 lio->li_end = ladvise->lla_end;
2327 lio->li_fid = ll_inode2fid(inode);
2328 lio->li_advice = ladvise->lla_advice;
2329 lio->li_flags = flags;
2331 if (cl_io_init(env, io, CIT_LADVISE, io->ci_obj) == 0)
2332 rc = cl_io_loop(env, io);
2336 cl_io_fini(env, io);
2337 cl_env_put(env, &refcheck);
2341 int ll_ioctl_projid(struct inode *inode, unsigned int cmd,
2345 struct fsxattr *fsxattr;
2346 int alloc_size = sizeof(*fsxattr);
2349 case LL_IOC_FSGETXATTR: {
2350 OBD_ALLOC_PTR(fsxattr);
2351 if (fsxattr == NULL)
2354 if (copy_from_user(fsxattr,
2355 (const struct fsxattr __user *)arg,
2357 GOTO(out_fsxattr, rc = -EFAULT);
2359 fsxattr->fsx_projid = ll_i2info(inode)->lli_projid;
2360 if (copy_to_user((struct fsxattr __user *)arg,
2361 fsxattr, alloc_size))
2362 GOTO(out_fsxattr, rc = -EFAULT);
2364 OBD_FREE(fsxattr, alloc_size);
2368 case LL_IOC_FSSETXATTR: {
2369 struct md_op_data *op_data;
2370 struct ptlrpc_request *req = NULL;
2372 /* only root could change project ID */
2373 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2376 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2377 LUSTRE_OPC_ANY, NULL);
2378 if (IS_ERR(op_data))
2379 RETURN(PTR_ERR(op_data));
2381 OBD_ALLOC_PTR(fsxattr);
2382 if (fsxattr == NULL)
2383 GOTO(out_fsxattr1, rc = -ENOMEM);
2385 if (copy_from_user(fsxattr,
2386 (const struct fsxattr __user *)arg,
2388 GOTO(out_fsxattr1, rc = -EFAULT);
2390 op_data->op_projid = fsxattr->fsx_projid;
2391 op_data->op_attr.ia_valid |= MDS_ATTR_PROJID;
2392 rc = md_setattr(ll_i2sbi(inode)->ll_md_exp, op_data, NULL,
2394 ptlrpc_req_finished(req);
2397 ll_finish_md_op_data(op_data);
2398 OBD_FREE(fsxattr, alloc_size);
2409 ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2411 struct inode *inode = file_inode(file);
2412 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2416 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%x\n",
2417 PFID(ll_inode2fid(inode)), inode, cmd);
2418 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
2420 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
2421 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
2425 case LL_IOC_GETFLAGS:
2426 /* Get the current value of the file flags */
2427 return put_user(fd->fd_flags, (int __user *)arg);
2428 case LL_IOC_SETFLAGS:
2429 case LL_IOC_CLRFLAGS:
2430 /* Set or clear specific file flags */
2431 /* XXX This probably needs checks to ensure the flags are
2432 * not abused, and to handle any flag side effects.
2434 if (get_user(flags, (int __user *) arg))
2437 if (cmd == LL_IOC_SETFLAGS) {
2438 if ((flags & LL_FILE_IGNORE_LOCK) &&
2439 !(file->f_flags & O_DIRECT)) {
2440 CERROR("%s: unable to disable locking on "
2441 "non-O_DIRECT file\n", current->comm);
2445 fd->fd_flags |= flags;
2447 fd->fd_flags &= ~flags;
2450 case LL_IOC_LOV_SETSTRIPE:
2451 RETURN(ll_lov_setstripe(inode, file, arg));
2452 case LL_IOC_LOV_SETEA:
2453 RETURN(ll_lov_setea(inode, file, arg));
2454 case LL_IOC_LOV_SWAP_LAYOUTS: {
2456 struct lustre_swap_layouts lsl;
2458 if (copy_from_user(&lsl, (char __user *)arg,
2459 sizeof(struct lustre_swap_layouts)))
2462 if ((file->f_flags & O_ACCMODE) == O_RDONLY)
2465 file2 = fget(lsl.sl_fd);
2469 /* O_WRONLY or O_RDWR */
2470 if ((file2->f_flags & O_ACCMODE) == O_RDONLY)
2471 GOTO(out, rc = -EPERM);
2473 if (lsl.sl_flags & SWAP_LAYOUTS_CLOSE) {
2474 struct inode *inode2;
2475 struct ll_inode_info *lli;
2476 struct obd_client_handle *och = NULL;
2478 if (lsl.sl_flags != SWAP_LAYOUTS_CLOSE)
2479 GOTO(out, rc = -EINVAL);
2481 lli = ll_i2info(inode);
2482 mutex_lock(&lli->lli_och_mutex);
2483 if (fd->fd_lease_och != NULL) {
2484 och = fd->fd_lease_och;
2485 fd->fd_lease_och = NULL;
2487 mutex_unlock(&lli->lli_och_mutex);
2489 GOTO(out, rc = -ENOLCK);
2490 inode2 = file_inode(file2);
2491 rc = ll_swap_layouts_close(och, inode, inode2);
2493 rc = ll_swap_layouts(file, file2, &lsl);
2499 case LL_IOC_LOV_GETSTRIPE:
2500 RETURN(ll_file_getstripe(inode,
2501 (struct lov_user_md __user *)arg));
2502 case FSFILT_IOC_GETFLAGS:
2503 case FSFILT_IOC_SETFLAGS:
2504 RETURN(ll_iocontrol(inode, file, cmd, arg));
2505 case FSFILT_IOC_GETVERSION_OLD:
2506 case FSFILT_IOC_GETVERSION:
2507 RETURN(put_user(inode->i_generation, (int __user *)arg));
2508 case LL_IOC_GROUP_LOCK:
2509 RETURN(ll_get_grouplock(inode, file, arg));
2510 case LL_IOC_GROUP_UNLOCK:
2511 RETURN(ll_put_grouplock(inode, file, arg));
2512 case IOC_OBD_STATFS:
2513 RETURN(ll_obd_statfs(inode, (void __user *)arg));
2515 /* We need to special case any other ioctls we want to handle,
2516 * to send them to the MDS/OST as appropriate and to properly
2517 * network encode the arg field.
2518 case FSFILT_IOC_SETVERSION_OLD:
2519 case FSFILT_IOC_SETVERSION:
2521 case LL_IOC_FLUSHCTX:
2522 RETURN(ll_flush_ctx(inode));
2523 case LL_IOC_PATH2FID: {
2524 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
2525 sizeof(struct lu_fid)))
2530 case LL_IOC_GETPARENT:
2531 RETURN(ll_getparent(file, (struct getparent __user *)arg));
2533 case OBD_IOC_FID2PATH:
2534 RETURN(ll_fid2path(inode, (void __user *)arg));
2535 case LL_IOC_DATA_VERSION: {
2536 struct ioc_data_version idv;
2539 if (copy_from_user(&idv, (char __user *)arg, sizeof(idv)))
2542 idv.idv_flags &= LL_DV_RD_FLUSH | LL_DV_WR_FLUSH;
2543 rc = ll_data_version(inode, &idv.idv_version, idv.idv_flags);
2546 copy_to_user((char __user *)arg, &idv, sizeof(idv)))
2552 case LL_IOC_GET_MDTIDX: {
2555 mdtidx = ll_get_mdt_idx(inode);
2559 if (put_user((int)mdtidx, (int __user *)arg))
2564 case OBD_IOC_GETDTNAME:
2565 case OBD_IOC_GETMDNAME:
2566 RETURN(ll_get_obd_name(inode, cmd, arg));
2567 case LL_IOC_HSM_STATE_GET: {
2568 struct md_op_data *op_data;
2569 struct hsm_user_state *hus;
2576 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2577 LUSTRE_OPC_ANY, hus);
2578 if (IS_ERR(op_data)) {
2580 RETURN(PTR_ERR(op_data));
2583 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data),
2586 if (copy_to_user((void __user *)arg, hus, sizeof(*hus)))
2589 ll_finish_md_op_data(op_data);
2593 case LL_IOC_HSM_STATE_SET: {
2594 struct hsm_state_set *hss;
2601 if (copy_from_user(hss, (char __user *)arg, sizeof(*hss))) {
2606 rc = ll_hsm_state_set(inode, hss);
2611 case LL_IOC_HSM_ACTION: {
2612 struct md_op_data *op_data;
2613 struct hsm_current_action *hca;
2620 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2621 LUSTRE_OPC_ANY, hca);
2622 if (IS_ERR(op_data)) {
2624 RETURN(PTR_ERR(op_data));
2627 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data),
2630 if (copy_to_user((char __user *)arg, hca, sizeof(*hca)))
2633 ll_finish_md_op_data(op_data);
2637 case LL_IOC_SET_LEASE: {
2638 struct ll_inode_info *lli = ll_i2info(inode);
2639 struct obd_client_handle *och = NULL;
2644 case LL_LEASE_WRLCK:
2645 if (!(file->f_mode & FMODE_WRITE))
2647 fmode = FMODE_WRITE;
2649 case LL_LEASE_RDLCK:
2650 if (!(file->f_mode & FMODE_READ))
2654 case LL_LEASE_UNLCK:
2655 mutex_lock(&lli->lli_och_mutex);
2656 if (fd->fd_lease_och != NULL) {
2657 och = fd->fd_lease_och;
2658 fd->fd_lease_och = NULL;
2660 mutex_unlock(&lli->lli_och_mutex);
2665 fmode = och->och_flags;
2666 rc = ll_lease_close(och, inode, &lease_broken);
2670 rc = ll_lease_och_release(inode, file);
2677 RETURN(ll_lease_type_from_fmode(fmode));
2682 CDEBUG(D_INODE, "Set lease with mode %u\n", fmode);
2684 /* apply for lease */
2685 och = ll_lease_open(inode, file, fmode, 0);
2687 RETURN(PTR_ERR(och));
2690 mutex_lock(&lli->lli_och_mutex);
2691 if (fd->fd_lease_och == NULL) {
2692 fd->fd_lease_och = och;
2695 mutex_unlock(&lli->lli_och_mutex);
2697 /* impossible now that only excl is supported for now */
2698 ll_lease_close(och, inode, &lease_broken);
2703 case LL_IOC_GET_LEASE: {
2704 struct ll_inode_info *lli = ll_i2info(inode);
2705 struct ldlm_lock *lock = NULL;
2708 mutex_lock(&lli->lli_och_mutex);
2709 if (fd->fd_lease_och != NULL) {
2710 struct obd_client_handle *och = fd->fd_lease_och;
2712 lock = ldlm_handle2lock(&och->och_lease_handle);
2714 lock_res_and_lock(lock);
2715 if (!ldlm_is_cancel(lock))
2716 fmode = och->och_flags;
2718 unlock_res_and_lock(lock);
2719 LDLM_LOCK_PUT(lock);
2722 mutex_unlock(&lli->lli_och_mutex);
2724 RETURN(ll_lease_type_from_fmode(fmode));
2726 case LL_IOC_HSM_IMPORT: {
2727 struct hsm_user_import *hui;
2733 if (copy_from_user(hui, (void __user *)arg, sizeof(*hui))) {
2738 rc = ll_hsm_import(inode, file, hui);
2743 case LL_IOC_FUTIMES_3: {
2744 struct ll_futimes_3 lfu;
2746 if (copy_from_user(&lfu,
2747 (const struct ll_futimes_3 __user *)arg,
2751 RETURN(ll_file_futimes_3(file, &lfu));
2753 case LL_IOC_LADVISE: {
2754 struct llapi_ladvise_hdr *ladvise_hdr;
2757 int alloc_size = sizeof(*ladvise_hdr);
2760 OBD_ALLOC_PTR(ladvise_hdr);
2761 if (ladvise_hdr == NULL)
2764 if (copy_from_user(ladvise_hdr,
2765 (const struct llapi_ladvise_hdr __user *)arg,
2767 GOTO(out_ladvise, rc = -EFAULT);
2769 if (ladvise_hdr->lah_magic != LADVISE_MAGIC ||
2770 ladvise_hdr->lah_count < 1)
2771 GOTO(out_ladvise, rc = -EINVAL);
2773 num_advise = ladvise_hdr->lah_count;
2774 if (num_advise >= LAH_COUNT_MAX)
2775 GOTO(out_ladvise, rc = -EFBIG);
2777 OBD_FREE_PTR(ladvise_hdr);
2778 alloc_size = offsetof(typeof(*ladvise_hdr),
2779 lah_advise[num_advise]);
2780 OBD_ALLOC(ladvise_hdr, alloc_size);
2781 if (ladvise_hdr == NULL)
2785 * TODO: submit multiple advices to one server in a single RPC
2787 if (copy_from_user(ladvise_hdr,
2788 (const struct llapi_ladvise_hdr __user *)arg,
2790 GOTO(out_ladvise, rc = -EFAULT);
2792 for (i = 0; i < num_advise; i++) {
2793 rc = ll_ladvise(inode, file, ladvise_hdr->lah_flags,
2794 &ladvise_hdr->lah_advise[i]);
2800 OBD_FREE(ladvise_hdr, alloc_size);
2803 case LL_IOC_FSGETXATTR:
2804 case LL_IOC_FSSETXATTR:
2805 RETURN(ll_ioctl_projid(inode, cmd, arg));
2810 ll_iocontrol_call(inode, file, cmd, arg, &err))
2813 RETURN(obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
2814 (void __user *)arg));
2819 #ifndef HAVE_FILE_LLSEEK_SIZE
2820 static inline loff_t
2821 llseek_execute(struct file *file, loff_t offset, loff_t maxsize)
2823 if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
2825 if (offset > maxsize)
2828 if (offset != file->f_pos) {
2829 file->f_pos = offset;
2830 file->f_version = 0;
2836 generic_file_llseek_size(struct file *file, loff_t offset, int origin,
2837 loff_t maxsize, loff_t eof)
2839 struct inode *inode = file_inode(file);
2847 * Here we special-case the lseek(fd, 0, SEEK_CUR)
2848 * position-querying operation. Avoid rewriting the "same"
2849 * f_pos value back to the file because a concurrent read(),
2850 * write() or lseek() might have altered it
2855 * f_lock protects against read/modify/write race with other
2856 * SEEK_CURs. Note that parallel writes and reads behave
2860 offset = llseek_execute(file, file->f_pos + offset, maxsize);
2861 inode_unlock(inode);
2865 * In the generic case the entire file is data, so as long as
2866 * offset isn't at the end of the file then the offset is data.
2873 * There is a virtual hole at the end of the file, so as long as
2874 * offset isn't i_size or larger, return i_size.
2882 return llseek_execute(file, offset, maxsize);
2886 static loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
2888 struct inode *inode = file_inode(file);
2889 loff_t retval, eof = 0;
2892 retval = offset + ((origin == SEEK_END) ? i_size_read(inode) :
2893 (origin == SEEK_CUR) ? file->f_pos : 0);
2894 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), to=%llu=%#llx(%d)\n",
2895 PFID(ll_inode2fid(inode)), inode, retval, retval,
2897 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK, 1);
2899 if (origin == SEEK_END || origin == SEEK_HOLE || origin == SEEK_DATA) {
2900 retval = ll_glimpse_size(inode);
2903 eof = i_size_read(inode);
2906 retval = ll_generic_file_llseek_size(file, offset, origin,
2907 ll_file_maxbytes(inode), eof);
2911 static int ll_flush(struct file *file, fl_owner_t id)
2913 struct inode *inode = file_inode(file);
2914 struct ll_inode_info *lli = ll_i2info(inode);
2915 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2918 LASSERT(!S_ISDIR(inode->i_mode));
2920 /* catch async errors that were recorded back when async writeback
2921 * failed for pages in this mapping. */
2922 rc = lli->lli_async_rc;
2923 lli->lli_async_rc = 0;
2924 if (lli->lli_clob != NULL) {
2925 err = lov_read_and_clear_async_rc(lli->lli_clob);
2930 /* The application has been told write failure already.
2931 * Do not report failure again. */
2932 if (fd->fd_write_failed)
2934 return rc ? -EIO : 0;
2938 * Called to make sure a portion of file has been written out.
2939 * if @mode is not CL_FSYNC_LOCAL, it will send OST_SYNC RPCs to OST.
2941 * Return how many pages have been written.
2943 int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end,
2944 enum cl_fsync_mode mode, int ignore_layout)
2948 struct cl_fsync_io *fio;
2953 if (mode != CL_FSYNC_NONE && mode != CL_FSYNC_LOCAL &&
2954 mode != CL_FSYNC_DISCARD && mode != CL_FSYNC_ALL)
2957 env = cl_env_get(&refcheck);
2959 RETURN(PTR_ERR(env));
2961 io = vvp_env_thread_io(env);
2962 io->ci_obj = ll_i2info(inode)->lli_clob;
2963 io->ci_ignore_layout = ignore_layout;
2965 /* initialize parameters for sync */
2966 fio = &io->u.ci_fsync;
2967 fio->fi_start = start;
2969 fio->fi_fid = ll_inode2fid(inode);
2970 fio->fi_mode = mode;
2971 fio->fi_nr_written = 0;
2973 if (cl_io_init(env, io, CIT_FSYNC, io->ci_obj) == 0)
2974 result = cl_io_loop(env, io);
2976 result = io->ci_result;
2978 result = fio->fi_nr_written;
2979 cl_io_fini(env, io);
2980 cl_env_put(env, &refcheck);
2986 * When dentry is provided (the 'else' case), file_dentry() may be
2987 * null and dentry must be used directly rather than pulled from
2988 * file_dentry() as is done otherwise.
2991 #ifdef HAVE_FILE_FSYNC_4ARGS
2992 int ll_fsync(struct file *file, loff_t start, loff_t end, int datasync)
2994 struct dentry *dentry = file_dentry(file);
2995 #elif defined(HAVE_FILE_FSYNC_2ARGS)
2996 int ll_fsync(struct file *file, int datasync)
2998 struct dentry *dentry = file_dentry(file);
3000 loff_t end = LLONG_MAX;
3002 int ll_fsync(struct file *file, struct dentry *dentry, int datasync)
3005 loff_t end = LLONG_MAX;
3007 struct inode *inode = dentry->d_inode;
3008 struct ll_inode_info *lli = ll_i2info(inode);
3009 struct ptlrpc_request *req;
3013 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
3014 PFID(ll_inode2fid(inode)), inode);
3015 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1);
3017 #ifdef HAVE_FILE_FSYNC_4ARGS
3018 rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
3021 /* fsync's caller has already called _fdata{sync,write}, we want
3022 * that IO to finish before calling the osc and mdc sync methods */
3023 rc = filemap_fdatawait(inode->i_mapping);
3026 /* catch async errors that were recorded back when async writeback
3027 * failed for pages in this mapping. */
3028 if (!S_ISDIR(inode->i_mode)) {
3029 err = lli->lli_async_rc;
3030 lli->lli_async_rc = 0;
3033 if (lli->lli_clob != NULL) {
3034 err = lov_read_and_clear_async_rc(lli->lli_clob);
3040 err = md_fsync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), &req);
3044 ptlrpc_req_finished(req);
3046 if (S_ISREG(inode->i_mode)) {
3047 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
3049 err = cl_sync_file_range(inode, start, end, CL_FSYNC_ALL, 0);
3050 if (rc == 0 && err < 0)
3053 fd->fd_write_failed = true;
3055 fd->fd_write_failed = false;
3058 #ifdef HAVE_FILE_FSYNC_4ARGS
3059 inode_unlock(inode);
3065 ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
3067 struct inode *inode = file_inode(file);
3068 struct ll_sb_info *sbi = ll_i2sbi(inode);
3069 struct ldlm_enqueue_info einfo = {
3070 .ei_type = LDLM_FLOCK,
3071 .ei_cb_cp = ldlm_flock_completion_ast,
3072 .ei_cbdata = file_lock,
3074 struct md_op_data *op_data;
3075 struct lustre_handle lockh = { 0 };
3076 union ldlm_policy_data flock = { { 0 } };
3077 int fl_type = file_lock->fl_type;
3083 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID" file_lock=%p\n",
3084 PFID(ll_inode2fid(inode)), file_lock);
3086 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK, 1);
3088 if (file_lock->fl_flags & FL_FLOCK) {
3089 LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK));
3090 /* flocks are whole-file locks */
3091 flock.l_flock.end = OFFSET_MAX;
3092 /* For flocks owner is determined by the local file desctiptor*/
3093 flock.l_flock.owner = (unsigned long)file_lock->fl_file;
3094 } else if (file_lock->fl_flags & FL_POSIX) {
3095 flock.l_flock.owner = (unsigned long)file_lock->fl_owner;
3096 flock.l_flock.start = file_lock->fl_start;
3097 flock.l_flock.end = file_lock->fl_end;
3101 flock.l_flock.pid = file_lock->fl_pid;
3103 /* Somewhat ugly workaround for svc lockd.
3104 * lockd installs custom fl_lmops->lm_compare_owner that checks
3105 * for the fl_owner to be the same (which it always is on local node
3106 * I guess between lockd processes) and then compares pid.
3107 * As such we assign pid to the owner field to make it all work,
3108 * conflict with normal locks is unlikely since pid space and
3109 * pointer space for current->files are not intersecting */
3110 if (file_lock->fl_lmops && file_lock->fl_lmops->lm_compare_owner)
3111 flock.l_flock.owner = (unsigned long)file_lock->fl_pid;
3115 einfo.ei_mode = LCK_PR;
3118 /* An unlock request may or may not have any relation to
3119 * existing locks so we may not be able to pass a lock handle
3120 * via a normal ldlm_lock_cancel() request. The request may even
3121 * unlock a byte range in the middle of an existing lock. In
3122 * order to process an unlock request we need all of the same
3123 * information that is given with a normal read or write record
3124 * lock request. To avoid creating another ldlm unlock (cancel)
3125 * message we'll treat a LCK_NL flock request as an unlock. */
3126 einfo.ei_mode = LCK_NL;
3129 einfo.ei_mode = LCK_PW;
3132 CDEBUG(D_INFO, "Unknown fcntl lock type: %d\n", fl_type);
3147 flags = LDLM_FL_BLOCK_NOWAIT;
3153 flags = LDLM_FL_TEST_LOCK;
3156 CERROR("unknown fcntl lock command: %d\n", cmd);
3160 /* Save the old mode so that if the mode in the lock changes we
3161 * can decrement the appropriate reader or writer refcount. */
3162 file_lock->fl_type = einfo.ei_mode;
3164 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
3165 LUSTRE_OPC_ANY, NULL);
3166 if (IS_ERR(op_data))
3167 RETURN(PTR_ERR(op_data));
3169 CDEBUG(D_DLMTRACE, "inode="DFID", pid=%u, flags=%#llx, mode=%u, "
3170 "start=%llu, end=%llu\n", PFID(ll_inode2fid(inode)),
3171 flock.l_flock.pid, flags, einfo.ei_mode,
3172 flock.l_flock.start, flock.l_flock.end);
3174 rc = md_enqueue(sbi->ll_md_exp, &einfo, &flock, op_data, &lockh,
3177 /* Restore the file lock type if not TEST lock. */
3178 if (!(flags & LDLM_FL_TEST_LOCK))
3179 file_lock->fl_type = fl_type;
3181 #ifdef HAVE_LOCKS_LOCK_FILE_WAIT
3182 if ((rc == 0 || file_lock->fl_type == F_UNLCK) &&
3183 !(flags & LDLM_FL_TEST_LOCK))
3184 rc2 = locks_lock_file_wait(file, file_lock);
3186 if ((file_lock->fl_flags & FL_FLOCK) &&
3187 (rc == 0 || file_lock->fl_type == F_UNLCK))
3188 rc2 = flock_lock_file_wait(file, file_lock);
3189 if ((file_lock->fl_flags & FL_POSIX) &&
3190 (rc == 0 || file_lock->fl_type == F_UNLCK) &&
3191 !(flags & LDLM_FL_TEST_LOCK))
3192 rc2 = posix_lock_file_wait(file, file_lock);
3193 #endif /* HAVE_LOCKS_LOCK_FILE_WAIT */
3195 if (rc2 && file_lock->fl_type != F_UNLCK) {
3196 einfo.ei_mode = LCK_NL;
3197 md_enqueue(sbi->ll_md_exp, &einfo, &flock, op_data,
3202 ll_finish_md_op_data(op_data);
3207 int ll_get_fid_by_name(struct inode *parent, const char *name,
3208 int namelen, struct lu_fid *fid,
3209 struct inode **inode)
3211 struct md_op_data *op_data = NULL;
3212 struct mdt_body *body;
3213 struct ptlrpc_request *req;
3217 op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen, 0,
3218 LUSTRE_OPC_ANY, NULL);
3219 if (IS_ERR(op_data))
3220 RETURN(PTR_ERR(op_data));
3222 op_data->op_valid = OBD_MD_FLID | OBD_MD_FLTYPE;
3223 rc = md_getattr_name(ll_i2sbi(parent)->ll_md_exp, op_data, &req);
3224 ll_finish_md_op_data(op_data);
3228 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
3230 GOTO(out_req, rc = -EFAULT);
3232 *fid = body->mbo_fid1;
3235 rc = ll_prep_inode(inode, req, parent->i_sb, NULL);
3237 ptlrpc_req_finished(req);
3241 int ll_migrate(struct inode *parent, struct file *file, int mdtidx,
3242 const char *name, int namelen)
3244 struct dentry *dchild = NULL;
3245 struct inode *child_inode = NULL;
3246 struct md_op_data *op_data;
3247 struct ptlrpc_request *request = NULL;
3248 struct obd_client_handle *och = NULL;
3250 struct mdt_body *body;
3252 __u64 data_version = 0;
3255 CDEBUG(D_VFSTRACE, "migrate %s under "DFID" to MDT%04x\n",
3256 name, PFID(ll_inode2fid(parent)), mdtidx);
3258 op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen,
3259 0, LUSTRE_OPC_ANY, NULL);
3260 if (IS_ERR(op_data))
3261 RETURN(PTR_ERR(op_data));
3263 /* Get child FID first */
3264 qstr.hash = full_name_hash(name, namelen);
3267 dchild = d_lookup(file_dentry(file), &qstr);
3268 if (dchild != NULL) {
3269 if (dchild->d_inode != NULL)
3270 child_inode = igrab(dchild->d_inode);
3274 if (child_inode == NULL) {
3275 rc = ll_get_fid_by_name(parent, name, namelen,
3276 &op_data->op_fid3, &child_inode);
3281 if (child_inode == NULL)
3282 GOTO(out_free, rc = -EINVAL);
3285 * lfs migrate command needs to be blocked on the client
3286 * by checking the migrate FID against the FID of the
3289 if (child_inode == parent->i_sb->s_root->d_inode)
3290 GOTO(out_iput, rc = -EINVAL);
3292 inode_lock(child_inode);
3293 op_data->op_fid3 = *ll_inode2fid(child_inode);
3294 if (!fid_is_sane(&op_data->op_fid3)) {
3295 CERROR("%s: migrate %s, but FID "DFID" is insane\n",
3296 ll_get_fsname(parent->i_sb, NULL, 0), name,
3297 PFID(&op_data->op_fid3));
3298 GOTO(out_unlock, rc = -EINVAL);
3301 rc = ll_get_mdt_idx_by_fid(ll_i2sbi(parent), &op_data->op_fid3);
3303 GOTO(out_unlock, rc);
3306 CDEBUG(D_INFO, "%s: "DFID" is already on MDT%04x\n", name,
3307 PFID(&op_data->op_fid3), mdtidx);
3308 GOTO(out_unlock, rc = 0);
3311 if (S_ISREG(child_inode->i_mode)) {
3312 och = ll_lease_open(child_inode, NULL, FMODE_WRITE, 0);
3316 GOTO(out_unlock, rc);
3319 rc = ll_data_version(child_inode, &data_version,
3322 GOTO(out_close, rc);
3324 op_data->op_handle = och->och_fh;
3325 op_data->op_data = och->och_mod;
3326 op_data->op_data_version = data_version;
3327 op_data->op_lease_handle = och->och_lease_handle;
3328 op_data->op_bias |= MDS_RENAME_MIGRATE;
3331 op_data->op_mds = mdtidx;
3332 op_data->op_cli_flags = CLI_MIGRATE;
3333 rc = md_rename(ll_i2sbi(parent)->ll_md_exp, op_data, name,
3334 namelen, name, namelen, &request);
3336 LASSERT(request != NULL);
3337 ll_update_times(request, parent);
3339 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
3340 LASSERT(body != NULL);
3342 /* If the server does release layout lock, then we cleanup
3343 * the client och here, otherwise release it in out_close: */
3345 body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED) {
3346 obd_mod_put(och->och_mod);
3347 md_clear_open_replay_data(ll_i2sbi(parent)->ll_md_exp,
3349 och->och_fh.cookie = DEAD_HANDLE_MAGIC;
3355 if (request != NULL) {
3356 ptlrpc_req_finished(request);
3360 /* Try again if the file layout has changed. */
3361 if (rc == -EAGAIN && S_ISREG(child_inode->i_mode))
3365 if (och != NULL) /* close the file */
3366 ll_lease_close(och, child_inode, NULL);
3368 clear_nlink(child_inode);
3370 inode_unlock(child_inode);
3374 ll_finish_md_op_data(op_data);
3379 ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock)
3387 * test if some locks matching bits and l_req_mode are acquired
3388 * - bits can be in different locks
3389 * - if found clear the common lock bits in *bits
3390 * - the bits not found, are kept in *bits
3392 * \param bits [IN] searched lock bits [IN]
3393 * \param l_req_mode [IN] searched lock mode
3394 * \retval boolean, true iff all bits are found
3396 int ll_have_md_lock(struct inode *inode, __u64 *bits, enum ldlm_mode l_req_mode)
3398 struct lustre_handle lockh;
3399 union ldlm_policy_data policy;
3400 enum ldlm_mode mode = (l_req_mode == LCK_MINMODE) ?
3401 (LCK_CR | LCK_CW | LCK_PR | LCK_PW) : l_req_mode;
3410 fid = &ll_i2info(inode)->lli_fid;
3411 CDEBUG(D_INFO, "trying to match res "DFID" mode %s\n", PFID(fid),
3412 ldlm_lockname[mode]);
3414 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK;
3415 for (i = 0; i <= MDS_INODELOCK_MAXSHIFT && *bits != 0; i++) {
3416 policy.l_inodebits.bits = *bits & (1 << i);
3417 if (policy.l_inodebits.bits == 0)
3420 if (md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS,
3421 &policy, mode, &lockh)) {
3422 struct ldlm_lock *lock;
3424 lock = ldlm_handle2lock(&lockh);
3427 ~(lock->l_policy_data.l_inodebits.bits);
3428 LDLM_LOCK_PUT(lock);
3430 *bits &= ~policy.l_inodebits.bits;
3437 enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits,
3438 struct lustre_handle *lockh, __u64 flags,
3439 enum ldlm_mode mode)
3441 union ldlm_policy_data policy = { .l_inodebits = { bits } };
3446 fid = &ll_i2info(inode)->lli_fid;
3447 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
3449 rc = md_lock_match(ll_i2mdexp(inode), LDLM_FL_BLOCK_GRANTED|flags,
3450 fid, LDLM_IBITS, &policy, mode, lockh);
3455 static int ll_inode_revalidate_fini(struct inode *inode, int rc)
3457 /* Already unlinked. Just update nlink and return success */
3458 if (rc == -ENOENT) {
3460 /* If it is striped directory, and there is bad stripe
3461 * Let's revalidate the dentry again, instead of returning
3463 if (S_ISDIR(inode->i_mode) &&
3464 ll_i2info(inode)->lli_lsm_md != NULL)
3467 /* This path cannot be hit for regular files unless in
3468 * case of obscure races, so no need to to validate
3470 if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
3472 } else if (rc != 0) {
3473 CDEBUG_LIMIT((rc == -EACCES || rc == -EIDRM) ? D_INFO : D_ERROR,
3474 "%s: revalidate FID "DFID" error: rc = %d\n",
3475 ll_get_fsname(inode->i_sb, NULL, 0),
3476 PFID(ll_inode2fid(inode)), rc);
3482 static int __ll_inode_revalidate(struct dentry *dentry, __u64 ibits)
3484 struct inode *inode = dentry->d_inode;
3485 struct ptlrpc_request *req = NULL;
3486 struct obd_export *exp;
3490 LASSERT(inode != NULL);
3492 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p),name=%s\n",
3493 PFID(ll_inode2fid(inode)), inode, dentry->d_name.name);
3495 exp = ll_i2mdexp(inode);
3497 /* XXX: Enable OBD_CONNECT_ATTRFID to reduce unnecessary getattr RPC.
3498 * But under CMD case, it caused some lock issues, should be fixed
3499 * with new CMD ibits lock. See bug 12718 */
3500 if (exp_connect_flags(exp) & OBD_CONNECT_ATTRFID) {
3501 struct lookup_intent oit = { .it_op = IT_GETATTR };
3502 struct md_op_data *op_data;
3504 if (ibits == MDS_INODELOCK_LOOKUP)
3505 oit.it_op = IT_LOOKUP;
3507 /* Call getattr by fid, so do not provide name at all. */
3508 op_data = ll_prep_md_op_data(NULL, dentry->d_inode,
3509 dentry->d_inode, NULL, 0, 0,
3510 LUSTRE_OPC_ANY, NULL);
3511 if (IS_ERR(op_data))
3512 RETURN(PTR_ERR(op_data));
3514 rc = md_intent_lock(exp, op_data, &oit, &req,
3515 &ll_md_blocking_ast, 0);
3516 ll_finish_md_op_data(op_data);
3518 rc = ll_inode_revalidate_fini(inode, rc);
3522 rc = ll_revalidate_it_finish(req, &oit, dentry);
3524 ll_intent_release(&oit);
3528 /* Unlinked? Unhash dentry, so it is not picked up later by
3529 do_lookup() -> ll_revalidate_it(). We cannot use d_drop
3530 here to preserve get_cwd functionality on 2.6.
3532 if (!dentry->d_inode->i_nlink) {
3533 ll_lock_dcache(inode);
3534 d_lustre_invalidate(dentry, 0);
3535 ll_unlock_dcache(inode);
3538 ll_lookup_finish_locks(&oit, dentry);
3539 } else if (!ll_have_md_lock(dentry->d_inode, &ibits, LCK_MINMODE)) {
3540 struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode);
3541 u64 valid = OBD_MD_FLGETATTR;
3542 struct md_op_data *op_data;
3545 if (S_ISREG(inode->i_mode)) {
3546 rc = ll_get_default_mdsize(sbi, &ealen);
3549 valid |= OBD_MD_FLEASIZE | OBD_MD_FLMODEASIZE;
3552 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
3553 0, ealen, LUSTRE_OPC_ANY,
3555 if (IS_ERR(op_data))
3556 RETURN(PTR_ERR(op_data));
3558 op_data->op_valid = valid;
3559 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
3560 ll_finish_md_op_data(op_data);
3562 rc = ll_inode_revalidate_fini(inode, rc);
3566 rc = ll_prep_inode(&inode, req, NULL, NULL);
3569 ptlrpc_req_finished(req);
3573 static int ll_merge_md_attr(struct inode *inode)
3575 struct cl_attr attr = { 0 };
3578 LASSERT(ll_i2info(inode)->lli_lsm_md != NULL);
3579 rc = md_merge_attr(ll_i2mdexp(inode), ll_i2info(inode)->lli_lsm_md,
3580 &attr, ll_md_blocking_ast);
3584 set_nlink(inode, attr.cat_nlink);
3585 inode->i_blocks = attr.cat_blocks;
3586 i_size_write(inode, attr.cat_size);
3588 ll_i2info(inode)->lli_atime = attr.cat_atime;
3589 ll_i2info(inode)->lli_mtime = attr.cat_mtime;
3590 ll_i2info(inode)->lli_ctime = attr.cat_ctime;
3596 ll_inode_revalidate(struct dentry *dentry, __u64 ibits)
3598 struct inode *inode = dentry->d_inode;
3602 rc = __ll_inode_revalidate(dentry, ibits);
3606 /* if object isn't regular file, don't validate size */
3607 if (!S_ISREG(inode->i_mode)) {
3608 if (S_ISDIR(inode->i_mode) &&
3609 ll_i2info(inode)->lli_lsm_md != NULL) {
3610 rc = ll_merge_md_attr(inode);
3615 LTIME_S(inode->i_atime) = ll_i2info(inode)->lli_atime;
3616 LTIME_S(inode->i_mtime) = ll_i2info(inode)->lli_mtime;
3617 LTIME_S(inode->i_ctime) = ll_i2info(inode)->lli_ctime;
3619 /* In case of restore, the MDT has the right size and has
3620 * already send it back without granting the layout lock,
3621 * inode is up-to-date so glimpse is useless.
3622 * Also to glimpse we need the layout, in case of a running
3623 * restore the MDT holds the layout lock so the glimpse will
3624 * block up to the end of restore (getattr will block)
3626 if (!ll_file_test_flag(ll_i2info(inode), LLIF_FILE_RESTORING))
3627 rc = ll_glimpse_size(inode);
3632 static inline dev_t ll_compat_encode_dev(dev_t dev)
3634 /* The compat_sys_*stat*() syscalls will fail unless the
3635 * device majors and minors are both less than 256. Note that
3636 * the value returned here will be passed through
3637 * old_encode_dev() in cp_compat_stat(). And so we are not
3638 * trying to return a valid compat (u16) device number, just
3639 * one that will pass the old_valid_dev() check. */
3641 return MKDEV(MAJOR(dev) & 0xff, MINOR(dev) & 0xff);
3644 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
3646 struct inode *inode = de->d_inode;
3647 struct ll_sb_info *sbi = ll_i2sbi(inode);
3648 struct ll_inode_info *lli = ll_i2info(inode);
3651 res = ll_inode_revalidate(de, MDS_INODELOCK_UPDATE |
3652 MDS_INODELOCK_LOOKUP);
3653 ll_stats_ops_tally(sbi, LPROC_LL_GETATTR, 1);
3658 OBD_FAIL_TIMEOUT(OBD_FAIL_GETATTR_DELAY, 30);
3660 if (ll_need_32bit_api(sbi)) {
3661 stat->ino = cl_fid_build_ino(&lli->lli_fid, 1);
3662 stat->dev = ll_compat_encode_dev(inode->i_sb->s_dev);
3663 stat->rdev = ll_compat_encode_dev(inode->i_rdev);
3665 stat->ino = inode->i_ino;
3666 stat->dev = inode->i_sb->s_dev;
3667 stat->rdev = inode->i_rdev;
3670 stat->mode = inode->i_mode;
3671 stat->uid = inode->i_uid;
3672 stat->gid = inode->i_gid;
3673 stat->atime = inode->i_atime;
3674 stat->mtime = inode->i_mtime;
3675 stat->ctime = inode->i_ctime;
3676 stat->blksize = 1 << inode->i_blkbits;
3678 stat->nlink = inode->i_nlink;
3679 stat->size = i_size_read(inode);
3680 stat->blocks = inode->i_blocks;
3685 static int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
3686 __u64 start, __u64 len)
3690 struct fiemap *fiemap;
3691 unsigned int extent_count = fieinfo->fi_extents_max;
3693 num_bytes = sizeof(*fiemap) + (extent_count *
3694 sizeof(struct fiemap_extent));
3695 OBD_ALLOC_LARGE(fiemap, num_bytes);
3700 fiemap->fm_flags = fieinfo->fi_flags;
3701 fiemap->fm_extent_count = fieinfo->fi_extents_max;
3702 fiemap->fm_start = start;
3703 fiemap->fm_length = len;
3704 if (extent_count > 0 &&
3705 copy_from_user(&fiemap->fm_extents[0], fieinfo->fi_extents_start,
3706 sizeof(struct fiemap_extent)) != 0)
3707 GOTO(out, rc = -EFAULT);
3709 rc = ll_do_fiemap(inode, fiemap, num_bytes);
3711 fieinfo->fi_flags = fiemap->fm_flags;
3712 fieinfo->fi_extents_mapped = fiemap->fm_mapped_extents;
3713 if (extent_count > 0 &&
3714 copy_to_user(fieinfo->fi_extents_start, &fiemap->fm_extents[0],
3715 fiemap->fm_mapped_extents *
3716 sizeof(struct fiemap_extent)) != 0)
3717 GOTO(out, rc = -EFAULT);
3719 OBD_FREE_LARGE(fiemap, num_bytes);
3723 struct posix_acl *ll_get_acl(struct inode *inode, int type)
3725 struct ll_inode_info *lli = ll_i2info(inode);
3726 struct posix_acl *acl = NULL;
3729 spin_lock(&lli->lli_lock);
3730 /* VFS' acl_permission_check->check_acl will release the refcount */
3731 acl = posix_acl_dup(lli->lli_posix_acl);
3732 spin_unlock(&lli->lli_lock);
3737 #ifndef HAVE_GENERIC_PERMISSION_2ARGS
3739 # ifdef HAVE_GENERIC_PERMISSION_4ARGS
3740 ll_check_acl(struct inode *inode, int mask, unsigned int flags)
3742 ll_check_acl(struct inode *inode, int mask)
3745 # ifdef CONFIG_FS_POSIX_ACL
3746 struct posix_acl *acl;
3750 # ifdef HAVE_GENERIC_PERMISSION_4ARGS
3751 if (flags & IPERM_FLAG_RCU)
3754 acl = ll_get_acl(inode, ACL_TYPE_ACCESS);
3759 rc = posix_acl_permission(inode, acl, mask);
3760 posix_acl_release(acl);
3763 # else /* !CONFIG_FS_POSIX_ACL */
3765 # endif /* CONFIG_FS_POSIX_ACL */
3767 #endif /* HAVE_GENERIC_PERMISSION_2ARGS */
3769 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
3770 int ll_inode_permission(struct inode *inode, int mask, unsigned int flags)
3772 # ifdef HAVE_INODE_PERMISION_2ARGS
3773 int ll_inode_permission(struct inode *inode, int mask)
3775 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
3780 struct ll_sb_info *sbi;
3781 struct root_squash_info *squash;
3782 struct cred *cred = NULL;
3783 const struct cred *old_cred = NULL;
3785 bool squash_id = false;
3788 #ifdef MAY_NOT_BLOCK
3789 if (mask & MAY_NOT_BLOCK)
3791 #elif defined(HAVE_GENERIC_PERMISSION_4ARGS)
3792 if (flags & IPERM_FLAG_RCU)
3796 /* as root inode are NOT getting validated in lookup operation,
3797 * need to do it before permission check. */
3799 if (inode == inode->i_sb->s_root->d_inode) {
3800 rc = __ll_inode_revalidate(inode->i_sb->s_root,
3801 MDS_INODELOCK_LOOKUP);
3806 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), inode mode %x mask %o\n",
3807 PFID(ll_inode2fid(inode)), inode, inode->i_mode, mask);
3809 /* squash fsuid/fsgid if needed */
3810 sbi = ll_i2sbi(inode);
3811 squash = &sbi->ll_squash;
3812 if (unlikely(squash->rsi_uid != 0 &&
3813 uid_eq(current_fsuid(), GLOBAL_ROOT_UID) &&
3814 !(sbi->ll_flags & LL_SBI_NOROOTSQUASH))) {
3818 CDEBUG(D_OTHER, "squash creds (%d:%d)=>(%d:%d)\n",
3819 __kuid_val(current_fsuid()), __kgid_val(current_fsgid()),
3820 squash->rsi_uid, squash->rsi_gid);
3822 /* update current process's credentials
3823 * and FS capability */
3824 cred = prepare_creds();
3828 cred->fsuid = make_kuid(&init_user_ns, squash->rsi_uid);
3829 cred->fsgid = make_kgid(&init_user_ns, squash->rsi_gid);
3830 for (cap = 0; cap < sizeof(cfs_cap_t) * 8; cap++) {
3831 if ((1 << cap) & CFS_CAP_FS_MASK)
3832 cap_lower(cred->cap_effective, cap);
3834 old_cred = override_creds(cred);
3837 ll_stats_ops_tally(sbi, LPROC_LL_INODE_PERM, 1);
3838 rc = ll_generic_permission(inode, mask, flags, ll_check_acl);
3839 /* restore current process's credentials and FS capability */
3841 revert_creds(old_cred);
3848 /* -o localflock - only provides locally consistent flock locks */
3849 struct file_operations ll_file_operations = {
3850 #ifdef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
3851 # ifdef HAVE_SYNC_READ_WRITE
3852 .read = new_sync_read,
3853 .write = new_sync_write,
3855 .read_iter = ll_file_read_iter,
3856 .write_iter = ll_file_write_iter,
3857 #else /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
3858 .read = ll_file_read,
3859 .aio_read = ll_file_aio_read,
3860 .write = ll_file_write,
3861 .aio_write = ll_file_aio_write,
3862 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
3863 .unlocked_ioctl = ll_file_ioctl,
3864 .open = ll_file_open,
3865 .release = ll_file_release,
3866 .mmap = ll_file_mmap,
3867 .llseek = ll_file_seek,
3868 .splice_read = ll_file_splice_read,
3873 struct file_operations ll_file_operations_flock = {
3874 #ifdef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
3875 # ifdef HAVE_SYNC_READ_WRITE
3876 .read = new_sync_read,
3877 .write = new_sync_write,
3878 # endif /* HAVE_SYNC_READ_WRITE */
3879 .read_iter = ll_file_read_iter,
3880 .write_iter = ll_file_write_iter,
3881 #else /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
3882 .read = ll_file_read,
3883 .aio_read = ll_file_aio_read,
3884 .write = ll_file_write,
3885 .aio_write = ll_file_aio_write,
3886 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
3887 .unlocked_ioctl = ll_file_ioctl,
3888 .open = ll_file_open,
3889 .release = ll_file_release,
3890 .mmap = ll_file_mmap,
3891 .llseek = ll_file_seek,
3892 .splice_read = ll_file_splice_read,
3895 .flock = ll_file_flock,
3896 .lock = ll_file_flock
3899 /* These are for -o noflock - to return ENOSYS on flock calls */
3900 struct file_operations ll_file_operations_noflock = {
3901 #ifdef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
3902 # ifdef HAVE_SYNC_READ_WRITE
3903 .read = new_sync_read,
3904 .write = new_sync_write,
3905 # endif /* HAVE_SYNC_READ_WRITE */
3906 .read_iter = ll_file_read_iter,
3907 .write_iter = ll_file_write_iter,
3908 #else /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
3909 .read = ll_file_read,
3910 .aio_read = ll_file_aio_read,
3911 .write = ll_file_write,
3912 .aio_write = ll_file_aio_write,
3913 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
3914 .unlocked_ioctl = ll_file_ioctl,
3915 .open = ll_file_open,
3916 .release = ll_file_release,
3917 .mmap = ll_file_mmap,
3918 .llseek = ll_file_seek,
3919 .splice_read = ll_file_splice_read,
3922 .flock = ll_file_noflock,
3923 .lock = ll_file_noflock
3926 struct inode_operations ll_file_inode_operations = {
3927 .setattr = ll_setattr,
3928 .getattr = ll_getattr,
3929 .permission = ll_inode_permission,
3930 .setxattr = ll_setxattr,
3931 .getxattr = ll_getxattr,
3932 .listxattr = ll_listxattr,
3933 .removexattr = ll_removexattr,
3934 .fiemap = ll_fiemap,
3935 #ifdef HAVE_IOP_GET_ACL
3936 .get_acl = ll_get_acl,
3940 /* dynamic ioctl number support routins */
3941 static struct llioc_ctl_data {
3942 struct rw_semaphore ioc_sem;
3943 struct list_head ioc_head;
3945 __RWSEM_INITIALIZER(llioc.ioc_sem),
3946 LIST_HEAD_INIT(llioc.ioc_head)
3951 struct list_head iocd_list;
3952 unsigned int iocd_size;
3953 llioc_callback_t iocd_cb;
3954 unsigned int iocd_count;
3955 unsigned int iocd_cmd[0];
3958 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd)
3961 struct llioc_data *in_data = NULL;
3964 if (cb == NULL || cmd == NULL ||
3965 count > LLIOC_MAX_CMD || count < 0)
3968 size = sizeof(*in_data) + count * sizeof(unsigned int);
3969 OBD_ALLOC(in_data, size);
3970 if (in_data == NULL)
3973 memset(in_data, 0, sizeof(*in_data));
3974 in_data->iocd_size = size;
3975 in_data->iocd_cb = cb;
3976 in_data->iocd_count = count;
3977 memcpy(in_data->iocd_cmd, cmd, sizeof(unsigned int) * count);
3979 down_write(&llioc.ioc_sem);
3980 list_add_tail(&in_data->iocd_list, &llioc.ioc_head);
3981 up_write(&llioc.ioc_sem);
3986 void ll_iocontrol_unregister(void *magic)
3988 struct llioc_data *tmp;
3993 down_write(&llioc.ioc_sem);
3994 list_for_each_entry(tmp, &llioc.ioc_head, iocd_list) {
3996 unsigned int size = tmp->iocd_size;
3998 list_del(&tmp->iocd_list);
3999 up_write(&llioc.ioc_sem);
4001 OBD_FREE(tmp, size);
4005 up_write(&llioc.ioc_sem);
4007 CWARN("didn't find iocontrol register block with magic: %p\n", magic);
4010 EXPORT_SYMBOL(ll_iocontrol_register);
4011 EXPORT_SYMBOL(ll_iocontrol_unregister);
4013 static enum llioc_iter
4014 ll_iocontrol_call(struct inode *inode, struct file *file,
4015 unsigned int cmd, unsigned long arg, int *rcp)
4017 enum llioc_iter ret = LLIOC_CONT;
4018 struct llioc_data *data;
4019 int rc = -EINVAL, i;
4021 down_read(&llioc.ioc_sem);
4022 list_for_each_entry(data, &llioc.ioc_head, iocd_list) {
4023 for (i = 0; i < data->iocd_count; i++) {
4024 if (cmd != data->iocd_cmd[i])
4027 ret = data->iocd_cb(inode, file, cmd, arg, data, &rc);
4031 if (ret == LLIOC_STOP)
4034 up_read(&llioc.ioc_sem);
4041 int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf)
4043 struct ll_inode_info *lli = ll_i2info(inode);
4044 struct cl_object *obj = lli->lli_clob;
4053 env = cl_env_get(&refcheck);
4055 RETURN(PTR_ERR(env));
4057 rc = cl_conf_set(env, lli->lli_clob, conf);
4061 if (conf->coc_opc == OBJECT_CONF_SET) {
4062 struct ldlm_lock *lock = conf->coc_lock;
4063 struct cl_layout cl = {
4067 LASSERT(lock != NULL);
4068 LASSERT(ldlm_has_layout(lock));
4070 /* it can only be allowed to match after layout is
4071 * applied to inode otherwise false layout would be
4072 * seen. Applying layout shoud happen before dropping
4073 * the intent lock. */
4074 ldlm_lock_allow_match(lock);
4076 rc = cl_object_layout_get(env, obj, &cl);
4081 DFID": layout version change: %u -> %u\n",
4082 PFID(&lli->lli_fid), ll_layout_version_get(lli),
4084 ll_layout_version_set(lli, cl.cl_layout_gen);
4088 cl_env_put(env, &refcheck);
4093 /* Fetch layout from MDT with getxattr request, if it's not ready yet */
4094 static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
4097 struct ll_sb_info *sbi = ll_i2sbi(inode);
4098 struct ptlrpc_request *req;
4099 struct mdt_body *body;
4106 CDEBUG(D_INODE, DFID" LVB_READY=%d l_lvb_data=%p l_lvb_len=%d\n",
4107 PFID(ll_inode2fid(inode)), ldlm_is_lvb_ready(lock),
4108 lock->l_lvb_data, lock->l_lvb_len);
4110 if (lock->l_lvb_data != NULL)
4113 /* if layout lock was granted right away, the layout is returned
4114 * within DLM_LVB of dlm reply; otherwise if the lock was ever
4115 * blocked and then granted via completion ast, we have to fetch
4116 * layout here. Please note that we can't use the LVB buffer in
4117 * completion AST because it doesn't have a large enough buffer */
4118 rc = ll_get_default_mdsize(sbi, &lmmsize);
4120 rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode),
4121 OBD_MD_FLXATTR, XATTR_NAME_LOV, NULL, 0,
4126 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
4128 GOTO(out, rc = -EPROTO);
4130 lmmsize = body->mbo_eadatasize;
4131 if (lmmsize == 0) /* empty layout */
4134 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA, lmmsize);
4136 GOTO(out, rc = -EFAULT);
4138 OBD_ALLOC_LARGE(lvbdata, lmmsize);
4139 if (lvbdata == NULL)
4140 GOTO(out, rc = -ENOMEM);
4142 memcpy(lvbdata, lmm, lmmsize);
4143 lock_res_and_lock(lock);
4144 if (unlikely(lock->l_lvb_data == NULL)) {
4145 lock->l_lvb_type = LVB_T_LAYOUT;
4146 lock->l_lvb_data = lvbdata;
4147 lock->l_lvb_len = lmmsize;
4150 unlock_res_and_lock(lock);
4153 OBD_FREE_LARGE(lvbdata, lmmsize);
4158 ptlrpc_req_finished(req);
4163 * Apply the layout to the inode. Layout lock is held and will be released
4166 static int ll_layout_lock_set(struct lustre_handle *lockh, enum ldlm_mode mode,
4167 struct inode *inode)
4169 struct ll_inode_info *lli = ll_i2info(inode);
4170 struct ll_sb_info *sbi = ll_i2sbi(inode);
4171 struct ldlm_lock *lock;
4172 struct cl_object_conf conf;
4175 bool wait_layout = false;
4178 LASSERT(lustre_handle_is_used(lockh));
4180 lock = ldlm_handle2lock(lockh);
4181 LASSERT(lock != NULL);
4182 LASSERT(ldlm_has_layout(lock));
4184 LDLM_DEBUG(lock, "file "DFID"(%p) being reconfigured",
4185 PFID(&lli->lli_fid), inode);
4187 /* in case this is a caching lock and reinstate with new inode */
4188 md_set_lock_data(sbi->ll_md_exp, lockh, inode, NULL);
4190 lock_res_and_lock(lock);
4191 lvb_ready = ldlm_is_lvb_ready(lock);
4192 unlock_res_and_lock(lock);
4194 /* checking lvb_ready is racy but this is okay. The worst case is
4195 * that multi processes may configure the file on the same time. */
4199 rc = ll_layout_fetch(inode, lock);
4203 /* for layout lock, lmm is stored in lock's lvb.
4204 * lvb_data is immutable if the lock is held so it's safe to access it
4207 * set layout to file. Unlikely this will fail as old layout was
4208 * surely eliminated */
4209 memset(&conf, 0, sizeof conf);
4210 conf.coc_opc = OBJECT_CONF_SET;
4211 conf.coc_inode = inode;
4212 conf.coc_lock = lock;
4213 conf.u.coc_layout.lb_buf = lock->l_lvb_data;
4214 conf.u.coc_layout.lb_len = lock->l_lvb_len;
4215 rc = ll_layout_conf(inode, &conf);
4217 /* refresh layout failed, need to wait */
4218 wait_layout = rc == -EBUSY;
4221 LDLM_LOCK_PUT(lock);
4222 ldlm_lock_decref(lockh, mode);
4224 /* wait for IO to complete if it's still being used. */
4226 CDEBUG(D_INODE, "%s: "DFID"(%p) wait for layout reconf\n",
4227 ll_get_fsname(inode->i_sb, NULL, 0),
4228 PFID(&lli->lli_fid), inode);
4230 memset(&conf, 0, sizeof conf);
4231 conf.coc_opc = OBJECT_CONF_WAIT;
4232 conf.coc_inode = inode;
4233 rc = ll_layout_conf(inode, &conf);
4237 CDEBUG(D_INODE, "%s file="DFID" waiting layout return: %d\n",
4238 ll_get_fsname(inode->i_sb, NULL, 0),
4239 PFID(&lli->lli_fid), rc);
4245 * Issue layout intent RPC to MDS.
4246 * \param inode [in] file inode
4247 * \param intent [in] layout intent
4249 * \retval 0 on success
4250 * \retval < 0 error code
4252 static int ll_layout_intent(struct inode *inode, struct layout_intent *intent)
4254 struct ll_inode_info *lli = ll_i2info(inode);
4255 struct ll_sb_info *sbi = ll_i2sbi(inode);
4256 struct md_op_data *op_data;
4257 struct lookup_intent it;
4258 struct ptlrpc_request *req;
4262 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL,
4263 0, 0, LUSTRE_OPC_ANY, NULL);
4264 if (IS_ERR(op_data))
4265 RETURN(PTR_ERR(op_data));
4267 op_data->op_data = intent;
4268 op_data->op_data_size = sizeof(*intent);
4270 memset(&it, 0, sizeof(it));
4271 it.it_op = IT_LAYOUT;
4272 if (intent->li_opc == LAYOUT_INTENT_WRITE ||
4273 intent->li_opc == LAYOUT_INTENT_TRUNC)
4274 it.it_flags = FMODE_WRITE;
4276 LDLM_DEBUG_NOLOCK("%s: requeue layout lock for file "DFID"(%p)",
4277 ll_get_fsname(inode->i_sb, NULL, 0),
4278 PFID(&lli->lli_fid), inode);
4280 rc = md_intent_lock(sbi->ll_md_exp, op_data, &it, &req,
4281 &ll_md_blocking_ast, 0);
4282 if (it.it_request != NULL)
4283 ptlrpc_req_finished(it.it_request);
4284 it.it_request = NULL;
4286 ll_finish_md_op_data(op_data);
4288 /* set lock data in case this is a new lock */
4290 ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL);
4292 ll_intent_drop_lock(&it);
4298 * This function checks if there exists a LAYOUT lock on the client side,
4299 * or enqueues it if it doesn't have one in cache.
4301 * This function will not hold layout lock so it may be revoked any time after
4302 * this function returns. Any operations depend on layout should be redone
4305 * This function should be called before lov_io_init() to get an uptodate
4306 * layout version, the caller should save the version number and after IO
4307 * is finished, this function should be called again to verify that layout
4308 * is not changed during IO time.
4310 int ll_layout_refresh(struct inode *inode, __u32 *gen)
4312 struct ll_inode_info *lli = ll_i2info(inode);
4313 struct ll_sb_info *sbi = ll_i2sbi(inode);
4314 struct lustre_handle lockh;
4315 struct layout_intent intent = {
4316 .li_opc = LAYOUT_INTENT_ACCESS,
4318 enum ldlm_mode mode;
4322 *gen = ll_layout_version_get(lli);
4323 if (!(sbi->ll_flags & LL_SBI_LAYOUT_LOCK) || *gen != CL_LAYOUT_GEN_NONE)
4327 LASSERT(fid_is_sane(ll_inode2fid(inode)));
4328 LASSERT(S_ISREG(inode->i_mode));
4330 /* take layout lock mutex to enqueue layout lock exclusively. */
4331 mutex_lock(&lli->lli_layout_mutex);
4334 /* mostly layout lock is caching on the local side, so try to
4335 * match it before grabbing layout lock mutex. */
4336 mode = ll_take_md_lock(inode, MDS_INODELOCK_LAYOUT, &lockh, 0,
4337 LCK_CR | LCK_CW | LCK_PR | LCK_PW);
4338 if (mode != 0) { /* hit cached lock */
4339 rc = ll_layout_lock_set(&lockh, mode, inode);
4345 rc = ll_layout_intent(inode, &intent);
4351 *gen = ll_layout_version_get(lli);
4352 mutex_unlock(&lli->lli_layout_mutex);
4358 * Issue layout intent RPC indicating where in a file an IO is about to write.
4360 * \param[in] inode file inode.
4361 * \param[in] start start offset of fille in bytes where an IO is about to
4363 * \param[in] end exclusive end offset in bytes of the write range.
4365 * \retval 0 on success
4366 * \retval < 0 error code
4368 int ll_layout_write_intent(struct inode *inode, __u64 start, __u64 end)
4370 struct layout_intent intent = {
4371 .li_opc = LAYOUT_INTENT_WRITE,
4378 rc = ll_layout_intent(inode, &intent);
4384 * This function send a restore request to the MDT
4386 int ll_layout_restore(struct inode *inode, loff_t offset, __u64 length)
4388 struct hsm_user_request *hur;
4392 len = sizeof(struct hsm_user_request) +
4393 sizeof(struct hsm_user_item);
4394 OBD_ALLOC(hur, len);
4398 hur->hur_request.hr_action = HUA_RESTORE;
4399 hur->hur_request.hr_archive_id = 0;
4400 hur->hur_request.hr_flags = 0;
4401 memcpy(&hur->hur_user_item[0].hui_fid, &ll_i2info(inode)->lli_fid,
4402 sizeof(hur->hur_user_item[0].hui_fid));
4403 hur->hur_user_item[0].hui_extent.offset = offset;
4404 hur->hur_user_item[0].hui_extent.length = length;
4405 hur->hur_request.hr_itemcount = 1;
4406 rc = obd_iocontrol(LL_IOC_HSM_REQUEST, ll_i2sbi(inode)->ll_md_exp,