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, 2017, 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>
49 #include <uapi/linux/lustre/lustre_ioctl.h>
50 #include <lustre_swab.h>
52 #include "cl_object.h"
53 #include "llite_internal.h"
54 #include "vvp_internal.h"
57 struct inode *sp_inode;
62 __u64 pa_data_version;
68 ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg);
70 static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
73 static struct ll_file_data *ll_file_data_get(void)
75 struct ll_file_data *fd;
77 OBD_SLAB_ALLOC_PTR_GFP(fd, ll_file_data_slab, GFP_NOFS);
81 fd->fd_write_failed = false;
82 pcc_file_init(&fd->fd_pcc_file);
87 static void ll_file_data_put(struct ll_file_data *fd)
90 OBD_SLAB_FREE_PTR(fd, ll_file_data_slab);
94 * Packs all the attributes into @op_data for the CLOSE rpc.
96 static void ll_prepare_close(struct inode *inode, struct md_op_data *op_data,
97 struct obd_client_handle *och)
101 ll_prep_md_op_data(op_data, inode, NULL, NULL,
102 0, 0, LUSTRE_OPC_ANY, NULL);
104 op_data->op_attr.ia_mode = inode->i_mode;
105 op_data->op_attr.ia_atime = inode->i_atime;
106 op_data->op_attr.ia_mtime = inode->i_mtime;
107 op_data->op_attr.ia_ctime = inode->i_ctime;
108 op_data->op_attr.ia_size = i_size_read(inode);
109 op_data->op_attr.ia_valid |= (ATTR_MODE | ATTR_ATIME | ATTR_ATIME_SET |
110 ATTR_MTIME | ATTR_MTIME_SET |
112 op_data->op_xvalid |= OP_XVALID_CTIME_SET;
113 op_data->op_attr_blocks = inode->i_blocks;
114 op_data->op_attr_flags = ll_inode_to_ext_flags(inode->i_flags);
115 if (ll_file_test_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT))
116 op_data->op_attr_flags |= LUSTRE_PROJINHERIT_FL;
117 op_data->op_open_handle = och->och_open_handle;
119 if (och->och_flags & FMODE_WRITE &&
120 ll_file_test_and_clear_flag(ll_i2info(inode), LLIF_DATA_MODIFIED))
121 /* For HSM: if inode data has been modified, pack it so that
122 * MDT can set data dirty flag in the archive. */
123 op_data->op_bias |= MDS_DATA_MODIFIED;
129 * Perform a close, possibly with a bias.
130 * The meaning of "data" depends on the value of "bias".
132 * If \a bias is MDS_HSM_RELEASE then \a data is a pointer to the data version.
133 * If \a bias is MDS_CLOSE_LAYOUT_SWAP then \a data is a pointer to the inode to
136 static int ll_close_inode_openhandle(struct inode *inode,
137 struct obd_client_handle *och,
138 enum mds_op_bias bias, void *data)
140 struct obd_export *md_exp = ll_i2mdexp(inode);
141 const struct ll_inode_info *lli = ll_i2info(inode);
142 struct md_op_data *op_data;
143 struct ptlrpc_request *req = NULL;
147 if (class_exp2obd(md_exp) == NULL) {
148 CERROR("%s: invalid MDC connection handle closing "DFID"\n",
149 ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
153 OBD_ALLOC_PTR(op_data);
154 /* We leak openhandle and request here on error, but not much to be
155 * done in OOM case since app won't retry close on error either. */
157 GOTO(out, rc = -ENOMEM);
159 ll_prepare_close(inode, op_data, och);
161 case MDS_CLOSE_LAYOUT_MERGE:
162 /* merge blocks from the victim inode */
163 op_data->op_attr_blocks += ((struct inode *)data)->i_blocks;
164 op_data->op_attr.ia_valid |= ATTR_SIZE;
165 op_data->op_xvalid |= OP_XVALID_BLOCKS;
166 case MDS_CLOSE_LAYOUT_SPLIT:
167 case MDS_CLOSE_LAYOUT_SWAP: {
168 struct split_param *sp = data;
170 LASSERT(data != NULL);
171 op_data->op_bias |= bias;
172 op_data->op_data_version = 0;
173 op_data->op_lease_handle = och->och_lease_handle;
174 if (bias == MDS_CLOSE_LAYOUT_SPLIT) {
175 op_data->op_fid2 = *ll_inode2fid(sp->sp_inode);
176 op_data->op_mirror_id = sp->sp_mirror_id;
178 op_data->op_fid2 = *ll_inode2fid(data);
183 case MDS_CLOSE_RESYNC_DONE: {
184 struct ll_ioc_lease *ioc = data;
186 LASSERT(data != NULL);
187 op_data->op_attr_blocks +=
188 ioc->lil_count * op_data->op_attr_blocks;
189 op_data->op_attr.ia_valid |= ATTR_SIZE;
190 op_data->op_xvalid |= OP_XVALID_BLOCKS;
191 op_data->op_bias |= MDS_CLOSE_RESYNC_DONE;
193 op_data->op_lease_handle = och->och_lease_handle;
194 op_data->op_data = &ioc->lil_ids[0];
195 op_data->op_data_size =
196 ioc->lil_count * sizeof(ioc->lil_ids[0]);
200 case MDS_PCC_ATTACH: {
201 struct pcc_param *param = data;
203 LASSERT(data != NULL);
204 op_data->op_bias |= MDS_HSM_RELEASE | MDS_PCC_ATTACH;
205 op_data->op_archive_id = param->pa_archive_id;
206 op_data->op_data_version = param->pa_data_version;
207 op_data->op_lease_handle = och->och_lease_handle;
211 case MDS_HSM_RELEASE:
212 LASSERT(data != NULL);
213 op_data->op_bias |= MDS_HSM_RELEASE;
214 op_data->op_data_version = *(__u64 *)data;
215 op_data->op_lease_handle = och->och_lease_handle;
216 op_data->op_attr.ia_valid |= ATTR_SIZE;
217 op_data->op_xvalid |= OP_XVALID_BLOCKS;
221 LASSERT(data == NULL);
225 if (!(op_data->op_attr.ia_valid & ATTR_SIZE))
226 op_data->op_xvalid |= OP_XVALID_LAZYSIZE;
227 if (!(op_data->op_xvalid & OP_XVALID_BLOCKS))
228 op_data->op_xvalid |= OP_XVALID_LAZYBLOCKS;
230 rc = md_close(md_exp, op_data, och->och_mod, &req);
231 if (rc != 0 && rc != -EINTR)
232 CERROR("%s: inode "DFID" mdc close failed: rc = %d\n",
233 md_exp->exp_obd->obd_name, PFID(&lli->lli_fid), rc);
235 if (rc == 0 && op_data->op_bias & bias) {
236 struct mdt_body *body;
238 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
239 if (!(body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED))
242 if (bias & MDS_PCC_ATTACH) {
243 struct pcc_param *param = data;
245 param->pa_layout_gen = body->mbo_layout_gen;
249 ll_finish_md_op_data(op_data);
253 md_clear_open_replay_data(md_exp, och);
254 och->och_open_handle.cookie = DEAD_HANDLE_MAGIC;
257 ptlrpc_req_finished(req); /* This is close request */
261 int ll_md_real_close(struct inode *inode, fmode_t fmode)
263 struct ll_inode_info *lli = ll_i2info(inode);
264 struct obd_client_handle **och_p;
265 struct obd_client_handle *och;
270 if (fmode & FMODE_WRITE) {
271 och_p = &lli->lli_mds_write_och;
272 och_usecount = &lli->lli_open_fd_write_count;
273 } else if (fmode & FMODE_EXEC) {
274 och_p = &lli->lli_mds_exec_och;
275 och_usecount = &lli->lli_open_fd_exec_count;
277 LASSERT(fmode & FMODE_READ);
278 och_p = &lli->lli_mds_read_och;
279 och_usecount = &lli->lli_open_fd_read_count;
282 mutex_lock(&lli->lli_och_mutex);
283 if (*och_usecount > 0) {
284 /* There are still users of this handle, so skip
286 mutex_unlock(&lli->lli_och_mutex);
292 mutex_unlock(&lli->lli_och_mutex);
295 /* There might be a race and this handle may already
297 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
303 static int ll_md_close(struct inode *inode, struct file *file)
305 union ldlm_policy_data policy = {
306 .l_inodebits = { MDS_INODELOCK_OPEN },
308 __u64 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
309 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
310 struct ll_inode_info *lli = ll_i2info(inode);
311 struct lustre_handle lockh;
312 enum ldlm_mode lockmode;
316 /* clear group lock, if present */
317 if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED))
318 ll_put_grouplock(inode, file, fd->fd_grouplock.lg_gid);
320 if (fd->fd_lease_och != NULL) {
323 /* Usually the lease is not released when the
324 * application crashed, we need to release here. */
325 rc = ll_lease_close(fd->fd_lease_och, inode, &lease_broken);
326 CDEBUG(rc ? D_ERROR : D_INODE, "Clean up lease "DFID" %d/%d\n",
327 PFID(&lli->lli_fid), rc, lease_broken);
329 fd->fd_lease_och = NULL;
332 if (fd->fd_och != NULL) {
333 rc = ll_close_inode_openhandle(inode, fd->fd_och, 0, NULL);
338 /* Let's see if we have good enough OPEN lock on the file and if
339 we can skip talking to MDS */
340 mutex_lock(&lli->lli_och_mutex);
341 if (fd->fd_omode & FMODE_WRITE) {
343 LASSERT(lli->lli_open_fd_write_count);
344 lli->lli_open_fd_write_count--;
345 } else if (fd->fd_omode & FMODE_EXEC) {
347 LASSERT(lli->lli_open_fd_exec_count);
348 lli->lli_open_fd_exec_count--;
351 LASSERT(lli->lli_open_fd_read_count);
352 lli->lli_open_fd_read_count--;
354 mutex_unlock(&lli->lli_och_mutex);
356 if (!md_lock_match(ll_i2mdexp(inode), flags, ll_inode2fid(inode),
357 LDLM_IBITS, &policy, lockmode, &lockh))
358 rc = ll_md_real_close(inode, fd->fd_omode);
361 LUSTRE_FPRIVATE(file) = NULL;
362 ll_file_data_put(fd);
367 /* While this returns an error code, fput() the caller does not, so we need
368 * to make every effort to clean up all of our state here. Also, applications
369 * rarely check close errors and even if an error is returned they will not
370 * re-try the close call.
372 int ll_file_release(struct inode *inode, struct file *file)
374 struct ll_file_data *fd;
375 struct ll_sb_info *sbi = ll_i2sbi(inode);
376 struct ll_inode_info *lli = ll_i2info(inode);
380 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
381 PFID(ll_inode2fid(inode)), inode);
383 if (inode->i_sb->s_root != file_dentry(file))
384 ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
385 fd = LUSTRE_FPRIVATE(file);
388 /* The last ref on @file, maybe not the the owner pid of statahead,
389 * because parent and child process can share the same file handle. */
390 if (S_ISDIR(inode->i_mode) && lli->lli_opendir_key == fd)
391 ll_deauthorize_statahead(inode, fd);
393 if (inode->i_sb->s_root == file_dentry(file)) {
394 LUSTRE_FPRIVATE(file) = NULL;
395 ll_file_data_put(fd);
399 pcc_file_release(inode, file);
401 if (!S_ISDIR(inode->i_mode)) {
402 if (lli->lli_clob != NULL)
403 lov_read_and_clear_async_rc(lli->lli_clob);
404 lli->lli_async_rc = 0;
407 rc = ll_md_close(inode, file);
409 if (CFS_FAIL_TIMEOUT_MS(OBD_FAIL_PTLRPC_DUMP_LOG, cfs_fail_val))
410 libcfs_debug_dumplog();
415 static inline int ll_dom_readpage(void *data, struct page *page)
417 struct niobuf_local *lnb = data;
420 kaddr = ll_kmap_atomic(page, KM_USER0);
421 memcpy(kaddr, lnb->lnb_data, lnb->lnb_len);
422 if (lnb->lnb_len < PAGE_SIZE)
423 memset(kaddr + lnb->lnb_len, 0,
424 PAGE_SIZE - lnb->lnb_len);
425 flush_dcache_page(page);
426 SetPageUptodate(page);
427 ll_kunmap_atomic(kaddr, KM_USER0);
433 void ll_dom_finish_open(struct inode *inode, struct ptlrpc_request *req,
434 struct lookup_intent *it)
436 struct ll_inode_info *lli = ll_i2info(inode);
437 struct cl_object *obj = lli->lli_clob;
438 struct address_space *mapping = inode->i_mapping;
440 struct niobuf_remote *rnb;
441 struct mdt_body *body;
443 unsigned long index, start;
444 struct niobuf_local lnb;
451 if (!req_capsule_has_field(&req->rq_pill, &RMF_NIOBUF_INLINE,
455 rnb = req_capsule_server_get(&req->rq_pill, &RMF_NIOBUF_INLINE);
456 if (rnb == NULL || rnb->rnb_len == 0)
459 /* LU-11595: Server may return whole file and that is OK always or
460 * it may return just file tail and its offset must be aligned with
461 * client PAGE_SIZE to be used on that client, if server's PAGE_SIZE is
462 * smaller then offset may be not aligned and that data is just ignored.
464 if (rnb->rnb_offset % PAGE_SIZE)
467 /* Server returns whole file or just file tail if it fills in reply
468 * buffer, in both cases total size should be equal to the file size.
470 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
471 if (rnb->rnb_offset + rnb->rnb_len != body->mbo_dom_size) {
472 CERROR("%s: server returns off/len %llu/%u but size %llu\n",
473 ll_i2sbi(inode)->ll_fsname, rnb->rnb_offset,
474 rnb->rnb_len, body->mbo_dom_size);
478 CDEBUG(D_INFO, "Get data along with open at %llu len %i, size %llu\n",
479 rnb->rnb_offset, rnb->rnb_len, body->mbo_dom_size);
481 data = (char *)rnb + sizeof(*rnb);
483 lnb.lnb_file_offset = rnb->rnb_offset;
484 start = lnb.lnb_file_offset / PAGE_SIZE;
486 LASSERT(lnb.lnb_file_offset % PAGE_SIZE == 0);
487 lnb.lnb_page_offset = 0;
489 lnb.lnb_data = data + (index << PAGE_SHIFT);
490 lnb.lnb_len = rnb->rnb_len - (index << PAGE_SHIFT);
491 if (lnb.lnb_len > PAGE_SIZE)
492 lnb.lnb_len = PAGE_SIZE;
494 vmpage = read_cache_page(mapping, index + start,
495 ll_dom_readpage, &lnb);
496 if (IS_ERR(vmpage)) {
497 CWARN("%s: cannot fill page %lu for "DFID
498 " with data: rc = %li\n",
499 ll_i2sbi(inode)->ll_fsname, index + start,
500 PFID(lu_object_fid(&obj->co_lu)),
506 } while (rnb->rnb_len > (index << PAGE_SHIFT));
510 static int ll_intent_file_open(struct dentry *de, void *lmm, int lmmsize,
511 struct lookup_intent *itp)
513 struct ll_sb_info *sbi = ll_i2sbi(de->d_inode);
514 struct dentry *parent = de->d_parent;
517 struct md_op_data *op_data;
518 struct ptlrpc_request *req = NULL;
522 LASSERT(parent != NULL);
523 LASSERT(itp->it_flags & MDS_OPEN_BY_FID);
525 /* if server supports open-by-fid, or file name is invalid, don't pack
526 * name in open request */
527 if (OBD_FAIL_CHECK(OBD_FAIL_LLITE_OPEN_BY_NAME) ||
528 !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_OPEN_BY_FID)) {
530 len = de->d_name.len;
531 name = kmalloc(len + 1, GFP_NOFS);
536 spin_lock(&de->d_lock);
537 if (len != de->d_name.len) {
538 spin_unlock(&de->d_lock);
542 memcpy(name, de->d_name.name, len);
544 spin_unlock(&de->d_lock);
546 if (!lu_name_is_valid_2(name, len)) {
552 op_data = ll_prep_md_op_data(NULL, parent->d_inode, de->d_inode,
553 name, len, 0, LUSTRE_OPC_ANY, NULL);
554 if (IS_ERR(op_data)) {
556 RETURN(PTR_ERR(op_data));
558 op_data->op_data = lmm;
559 op_data->op_data_size = lmmsize;
561 rc = md_intent_lock(sbi->ll_md_exp, op_data, itp, &req,
562 &ll_md_blocking_ast, 0);
564 ll_finish_md_op_data(op_data);
566 /* reason for keep own exit path - don`t flood log
567 * with messages with -ESTALE errors.
569 if (!it_disposition(itp, DISP_OPEN_OPEN) ||
570 it_open_error(DISP_OPEN_OPEN, itp))
572 ll_release_openhandle(de, itp);
576 if (it_disposition(itp, DISP_LOOKUP_NEG))
577 GOTO(out, rc = -ENOENT);
579 if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) {
580 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp);
581 CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc);
585 rc = ll_prep_inode(&de->d_inode, req, NULL, itp);
587 if (!rc && itp->it_lock_mode) {
588 struct lustre_handle handle = {.cookie = itp->it_lock_handle};
589 struct ldlm_lock *lock;
590 bool has_dom_bit = false;
592 /* If we got a lock back and it has a LOOKUP bit set,
593 * make sure the dentry is marked as valid so we can find it.
594 * We don't need to care about actual hashing since other bits
595 * of kernel will deal with that later.
597 lock = ldlm_handle2lock(&handle);
599 has_dom_bit = ldlm_has_dom(lock);
600 if (lock->l_policy_data.l_inodebits.bits &
601 MDS_INODELOCK_LOOKUP)
602 d_lustre_revalidate(de);
606 ll_set_lock_data(sbi->ll_md_exp, de->d_inode, itp, NULL);
608 ll_dom_finish_open(de->d_inode, req, itp);
612 ptlrpc_req_finished(req);
613 ll_intent_drop_lock(itp);
615 /* We did open by fid, but by the time we got to the server,
616 * the object disappeared. If this is a create, we cannot really
617 * tell the userspace that the file it was trying to create
618 * does not exist. Instead let's return -ESTALE, and the VFS will
619 * retry the create with LOOKUP_REVAL that we are going to catch
620 * in ll_revalidate_dentry() and use lookup then.
622 if (rc == -ENOENT && itp->it_op & IT_CREAT)
628 static int ll_och_fill(struct obd_export *md_exp, struct lookup_intent *it,
629 struct obd_client_handle *och)
631 struct mdt_body *body;
633 body = req_capsule_server_get(&it->it_request->rq_pill, &RMF_MDT_BODY);
634 och->och_open_handle = body->mbo_open_handle;
635 och->och_fid = body->mbo_fid1;
636 och->och_lease_handle.cookie = it->it_lock_handle;
637 och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
638 och->och_flags = it->it_flags;
640 return md_set_open_replay_data(md_exp, och, it);
643 static int ll_local_open(struct file *file, struct lookup_intent *it,
644 struct ll_file_data *fd, struct obd_client_handle *och)
646 struct inode *inode = file_inode(file);
649 LASSERT(!LUSTRE_FPRIVATE(file));
656 rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och);
661 LUSTRE_FPRIVATE(file) = fd;
662 ll_readahead_init(inode, &fd->fd_ras);
663 fd->fd_omode = it->it_flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
665 /* ll_cl_context initialize */
666 rwlock_init(&fd->fd_lock);
667 INIT_LIST_HEAD(&fd->fd_lccs);
672 /* Open a file, and (for the very first open) create objects on the OSTs at
673 * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object
674 * creation or open until ll_lov_setstripe() ioctl is called.
676 * If we already have the stripe MD locally then we don't request it in
677 * md_open(), by passing a lmm_size = 0.
679 * It is up to the application to ensure no other processes open this file
680 * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
681 * used. We might be able to avoid races of that sort by getting lli_open_sem
682 * before returning in the O_LOV_DELAY_CREATE case and dropping it here
683 * or in ll_file_release(), but I'm not sure that is desirable/necessary.
685 int ll_file_open(struct inode *inode, struct file *file)
687 struct ll_inode_info *lli = ll_i2info(inode);
688 struct lookup_intent *it, oit = { .it_op = IT_OPEN,
689 .it_flags = file->f_flags };
690 struct obd_client_handle **och_p = NULL;
691 __u64 *och_usecount = NULL;
692 struct ll_file_data *fd;
696 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), flags %o\n",
697 PFID(ll_inode2fid(inode)), inode, file->f_flags);
699 it = file->private_data; /* XXX: compat macro */
700 file->private_data = NULL; /* prevent ll_local_open assertion */
702 fd = ll_file_data_get();
704 GOTO(out_nofiledata, rc = -ENOMEM);
707 if (S_ISDIR(inode->i_mode))
708 ll_authorize_statahead(inode, fd);
710 if (inode->i_sb->s_root == file_dentry(file)) {
711 LUSTRE_FPRIVATE(file) = fd;
715 if (!it || !it->it_disposition) {
716 /* Convert f_flags into access mode. We cannot use file->f_mode,
717 * because everything but O_ACCMODE mask was stripped from
719 if ((oit.it_flags + 1) & O_ACCMODE)
721 if (file->f_flags & O_TRUNC)
722 oit.it_flags |= FMODE_WRITE;
724 /* kernel only call f_op->open in dentry_open. filp_open calls
725 * dentry_open after call to open_namei that checks permissions.
726 * Only nfsd_open call dentry_open directly without checking
727 * permissions and because of that this code below is safe.
729 if (oit.it_flags & (FMODE_WRITE | FMODE_READ))
730 oit.it_flags |= MDS_OPEN_OWNEROVERRIDE;
732 /* We do not want O_EXCL here, presumably we opened the file
733 * already? XXX - NFS implications? */
734 oit.it_flags &= ~O_EXCL;
736 /* bug20584, if "it_flags" contains O_CREAT, the file will be
737 * created if necessary, then "IT_CREAT" should be set to keep
738 * consistent with it */
739 if (oit.it_flags & O_CREAT)
740 oit.it_op |= IT_CREAT;
746 /* Let's see if we have file open on MDS already. */
747 if (it->it_flags & FMODE_WRITE) {
748 och_p = &lli->lli_mds_write_och;
749 och_usecount = &lli->lli_open_fd_write_count;
750 } else if (it->it_flags & FMODE_EXEC) {
751 och_p = &lli->lli_mds_exec_och;
752 och_usecount = &lli->lli_open_fd_exec_count;
754 och_p = &lli->lli_mds_read_och;
755 och_usecount = &lli->lli_open_fd_read_count;
758 mutex_lock(&lli->lli_och_mutex);
759 if (*och_p) { /* Open handle is present */
760 if (it_disposition(it, DISP_OPEN_OPEN)) {
761 /* Well, there's extra open request that we do not need,
762 let's close it somehow. This will decref request. */
763 rc = it_open_error(DISP_OPEN_OPEN, it);
765 mutex_unlock(&lli->lli_och_mutex);
766 GOTO(out_openerr, rc);
769 ll_release_openhandle(file_dentry(file), it);
773 rc = ll_local_open(file, it, fd, NULL);
776 mutex_unlock(&lli->lli_och_mutex);
777 GOTO(out_openerr, rc);
780 LASSERT(*och_usecount == 0);
781 if (!it->it_disposition) {
782 struct ll_dentry_data *ldd = ll_d2d(file->f_path.dentry);
783 /* We cannot just request lock handle now, new ELC code
784 means that one of other OPEN locks for this file
785 could be cancelled, and since blocking ast handler
786 would attempt to grab och_mutex as well, that would
787 result in a deadlock */
788 mutex_unlock(&lli->lli_och_mutex);
790 * Normally called under two situations:
792 * 2. A race/condition on MDS resulting in no open
793 * handle to be returned from LOOKUP|OPEN request,
794 * for example if the target entry was a symlink.
796 * Only fetch MDS_OPEN_LOCK if this is in NFS path,
797 * marked by a bit set in ll_iget_for_nfs. Clear the
798 * bit so that it's not confusing later callers.
800 * NB; when ldd is NULL, it must have come via normal
801 * lookup path only, since ll_iget_for_nfs always calls
804 if (ldd && ldd->lld_nfs_dentry) {
805 ldd->lld_nfs_dentry = 0;
806 it->it_flags |= MDS_OPEN_LOCK;
810 * Always specify MDS_OPEN_BY_FID because we don't want
811 * to get file with different fid.
813 it->it_flags |= MDS_OPEN_BY_FID;
814 rc = ll_intent_file_open(file_dentry(file), NULL, 0,
817 GOTO(out_openerr, rc);
821 OBD_ALLOC(*och_p, sizeof (struct obd_client_handle));
823 GOTO(out_och_free, rc = -ENOMEM);
827 /* md_intent_lock() didn't get a request ref if there was an
828 * open error, so don't do cleanup on the request here
830 /* XXX (green): Should not we bail out on any error here, not
831 * just open error? */
832 rc = it_open_error(DISP_OPEN_OPEN, it);
834 GOTO(out_och_free, rc);
836 LASSERTF(it_disposition(it, DISP_ENQ_OPEN_REF),
837 "inode %p: disposition %x, status %d\n", inode,
838 it_disposition(it, ~0), it->it_status);
840 rc = ll_local_open(file, it, fd, *och_p);
842 GOTO(out_och_free, rc);
845 rc = pcc_file_open(inode, file);
847 GOTO(out_och_free, rc);
849 mutex_unlock(&lli->lli_och_mutex);
852 /* Must do this outside lli_och_mutex lock to prevent deadlock where
853 different kind of OPEN lock for this same inode gets cancelled
854 by ldlm_cancel_lru */
855 if (!S_ISREG(inode->i_mode))
856 GOTO(out_och_free, rc);
858 cl_lov_delay_create_clear(&file->f_flags);
859 GOTO(out_och_free, rc);
863 if (och_p && *och_p) {
864 OBD_FREE(*och_p, sizeof (struct obd_client_handle));
865 *och_p = NULL; /* OBD_FREE writes some magic there */
868 mutex_unlock(&lli->lli_och_mutex);
871 if (lli->lli_opendir_key == fd)
872 ll_deauthorize_statahead(inode, fd);
875 ll_file_data_put(fd);
877 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN, 1);
881 if (it && it_disposition(it, DISP_ENQ_OPEN_REF)) {
882 ptlrpc_req_finished(it->it_request);
883 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
889 static int ll_md_blocking_lease_ast(struct ldlm_lock *lock,
890 struct ldlm_lock_desc *desc, void *data, int flag)
893 struct lustre_handle lockh;
897 case LDLM_CB_BLOCKING:
898 ldlm_lock2handle(lock, &lockh);
899 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
901 CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
905 case LDLM_CB_CANCELING:
913 * When setting a lease on a file, we take ownership of the lli_mds_*_och
914 * and save it as fd->fd_och so as to force client to reopen the file even
915 * if it has an open lock in cache already.
917 static int ll_lease_och_acquire(struct inode *inode, struct file *file,
918 struct lustre_handle *old_open_handle)
920 struct ll_inode_info *lli = ll_i2info(inode);
921 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
922 struct obd_client_handle **och_p;
927 /* Get the openhandle of the file */
928 mutex_lock(&lli->lli_och_mutex);
929 if (fd->fd_lease_och != NULL)
930 GOTO(out_unlock, rc = -EBUSY);
932 if (fd->fd_och == NULL) {
933 if (file->f_mode & FMODE_WRITE) {
934 LASSERT(lli->lli_mds_write_och != NULL);
935 och_p = &lli->lli_mds_write_och;
936 och_usecount = &lli->lli_open_fd_write_count;
938 LASSERT(lli->lli_mds_read_och != NULL);
939 och_p = &lli->lli_mds_read_och;
940 och_usecount = &lli->lli_open_fd_read_count;
943 if (*och_usecount > 1)
944 GOTO(out_unlock, rc = -EBUSY);
951 *old_open_handle = fd->fd_och->och_open_handle;
955 mutex_unlock(&lli->lli_och_mutex);
960 * Release ownership on lli_mds_*_och when putting back a file lease.
962 static int ll_lease_och_release(struct inode *inode, struct file *file)
964 struct ll_inode_info *lli = ll_i2info(inode);
965 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
966 struct obd_client_handle **och_p;
967 struct obd_client_handle *old_och = NULL;
972 mutex_lock(&lli->lli_och_mutex);
973 if (file->f_mode & FMODE_WRITE) {
974 och_p = &lli->lli_mds_write_och;
975 och_usecount = &lli->lli_open_fd_write_count;
977 och_p = &lli->lli_mds_read_och;
978 och_usecount = &lli->lli_open_fd_read_count;
981 /* The file may have been open by another process (broken lease) so
982 * *och_p is not NULL. In this case we should simply increase usecount
985 if (*och_p != NULL) {
986 old_och = fd->fd_och;
993 mutex_unlock(&lli->lli_och_mutex);
996 rc = ll_close_inode_openhandle(inode, old_och, 0, NULL);
1002 * Acquire a lease and open the file.
1004 static struct obd_client_handle *
1005 ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
1008 struct lookup_intent it = { .it_op = IT_OPEN };
1009 struct ll_sb_info *sbi = ll_i2sbi(inode);
1010 struct md_op_data *op_data;
1011 struct ptlrpc_request *req = NULL;
1012 struct lustre_handle old_open_handle = { 0 };
1013 struct obd_client_handle *och = NULL;
1018 if (fmode != FMODE_WRITE && fmode != FMODE_READ)
1019 RETURN(ERR_PTR(-EINVAL));
1022 if (!(fmode & file->f_mode) || (file->f_mode & FMODE_EXEC))
1023 RETURN(ERR_PTR(-EPERM));
1025 rc = ll_lease_och_acquire(inode, file, &old_open_handle);
1027 RETURN(ERR_PTR(rc));
1032 RETURN(ERR_PTR(-ENOMEM));
1034 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
1035 LUSTRE_OPC_ANY, NULL);
1036 if (IS_ERR(op_data))
1037 GOTO(out, rc = PTR_ERR(op_data));
1039 /* To tell the MDT this openhandle is from the same owner */
1040 op_data->op_open_handle = old_open_handle;
1042 it.it_flags = fmode | open_flags;
1043 it.it_flags |= MDS_OPEN_LOCK | MDS_OPEN_BY_FID | MDS_OPEN_LEASE;
1044 rc = md_intent_lock(sbi->ll_md_exp, op_data, &it, &req,
1045 &ll_md_blocking_lease_ast,
1046 /* LDLM_FL_NO_LRU: To not put the lease lock into LRU list, otherwise
1047 * it can be cancelled which may mislead applications that the lease is
1049 * LDLM_FL_EXCL: Set this flag so that it won't be matched by normal
1050 * open in ll_md_blocking_ast(). Otherwise as ll_md_blocking_lease_ast
1051 * doesn't deal with openhandle, so normal openhandle will be leaked. */
1052 LDLM_FL_NO_LRU | LDLM_FL_EXCL);
1053 ll_finish_md_op_data(op_data);
1054 ptlrpc_req_finished(req);
1056 GOTO(out_release_it, rc);
1058 if (it_disposition(&it, DISP_LOOKUP_NEG))
1059 GOTO(out_release_it, rc = -ENOENT);
1061 rc = it_open_error(DISP_OPEN_OPEN, &it);
1063 GOTO(out_release_it, rc);
1065 LASSERT(it_disposition(&it, DISP_ENQ_OPEN_REF));
1066 ll_och_fill(sbi->ll_md_exp, &it, och);
1068 if (!it_disposition(&it, DISP_OPEN_LEASE)) /* old server? */
1069 GOTO(out_close, rc = -EOPNOTSUPP);
1071 /* already get lease, handle lease lock */
1072 ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL);
1073 if (it.it_lock_mode == 0 ||
1074 it.it_lock_bits != MDS_INODELOCK_OPEN) {
1075 /* open lock must return for lease */
1076 CERROR(DFID "lease granted but no open lock, %d/%llu.\n",
1077 PFID(ll_inode2fid(inode)), it.it_lock_mode,
1079 GOTO(out_close, rc = -EPROTO);
1082 ll_intent_release(&it);
1086 /* Cancel open lock */
1087 if (it.it_lock_mode != 0) {
1088 ldlm_lock_decref_and_cancel(&och->och_lease_handle,
1090 it.it_lock_mode = 0;
1091 och->och_lease_handle.cookie = 0ULL;
1093 rc2 = ll_close_inode_openhandle(inode, och, 0, NULL);
1095 CERROR("%s: error closing file "DFID": %d\n",
1096 sbi->ll_fsname, PFID(&ll_i2info(inode)->lli_fid), rc2);
1097 och = NULL; /* och has been freed in ll_close_inode_openhandle() */
1099 ll_intent_release(&it);
1103 RETURN(ERR_PTR(rc));
1107 * Check whether a layout swap can be done between two inodes.
1109 * \param[in] inode1 First inode to check
1110 * \param[in] inode2 Second inode to check
1112 * \retval 0 on success, layout swap can be performed between both inodes
1113 * \retval negative error code if requirements are not met
1115 static int ll_check_swap_layouts_validity(struct inode *inode1,
1116 struct inode *inode2)
1118 if (!S_ISREG(inode1->i_mode) || !S_ISREG(inode2->i_mode))
1121 if (inode_permission(inode1, MAY_WRITE) ||
1122 inode_permission(inode2, MAY_WRITE))
1125 if (inode1->i_sb != inode2->i_sb)
1131 static int ll_swap_layouts_close(struct obd_client_handle *och,
1132 struct inode *inode, struct inode *inode2)
1134 const struct lu_fid *fid1 = ll_inode2fid(inode);
1135 const struct lu_fid *fid2;
1139 CDEBUG(D_INODE, "%s: biased close of file "DFID"\n",
1140 ll_i2sbi(inode)->ll_fsname, PFID(fid1));
1142 rc = ll_check_swap_layouts_validity(inode, inode2);
1144 GOTO(out_free_och, rc);
1146 /* We now know that inode2 is a lustre inode */
1147 fid2 = ll_inode2fid(inode2);
1149 rc = lu_fid_cmp(fid1, fid2);
1151 GOTO(out_free_och, rc = -EINVAL);
1153 /* Close the file and {swap,merge} layouts between inode & inode2.
1154 * NB: lease lock handle is released in mdc_close_layout_swap_pack()
1155 * because we still need it to pack l_remote_handle to MDT. */
1156 rc = ll_close_inode_openhandle(inode, och, MDS_CLOSE_LAYOUT_SWAP,
1159 och = NULL; /* freed in ll_close_inode_openhandle() */
1169 * Release lease and close the file.
1170 * It will check if the lease has ever broken.
1172 static int ll_lease_close_intent(struct obd_client_handle *och,
1173 struct inode *inode,
1174 bool *lease_broken, enum mds_op_bias bias,
1177 struct ldlm_lock *lock;
1178 bool cancelled = true;
1182 lock = ldlm_handle2lock(&och->och_lease_handle);
1184 lock_res_and_lock(lock);
1185 cancelled = ldlm_is_cancel(lock);
1186 unlock_res_and_lock(lock);
1187 LDLM_LOCK_PUT(lock);
1190 CDEBUG(D_INODE, "lease for "DFID" broken? %d, bias: %x\n",
1191 PFID(&ll_i2info(inode)->lli_fid), cancelled, bias);
1193 if (lease_broken != NULL)
1194 *lease_broken = cancelled;
1196 if (!cancelled && !bias)
1197 ldlm_cli_cancel(&och->och_lease_handle, 0);
1199 if (cancelled) { /* no need to excute intent */
1204 rc = ll_close_inode_openhandle(inode, och, bias, data);
1208 static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
1211 return ll_lease_close_intent(och, inode, lease_broken, 0, NULL);
1215 * After lease is taken, send the RPC MDS_REINT_RESYNC to the MDT
1217 static int ll_lease_file_resync(struct obd_client_handle *och,
1218 struct inode *inode, unsigned long arg)
1220 struct ll_sb_info *sbi = ll_i2sbi(inode);
1221 struct md_op_data *op_data;
1222 struct ll_ioc_lease_id ioc;
1223 __u64 data_version_unused;
1227 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1228 LUSTRE_OPC_ANY, NULL);
1229 if (IS_ERR(op_data))
1230 RETURN(PTR_ERR(op_data));
1232 if (copy_from_user(&ioc, (struct ll_ioc_lease_id __user *)arg,
1236 /* before starting file resync, it's necessary to clean up page cache
1237 * in client memory, otherwise once the layout version is increased,
1238 * writing back cached data will be denied the OSTs. */
1239 rc = ll_data_version(inode, &data_version_unused, LL_DV_WR_FLUSH);
1243 op_data->op_lease_handle = och->och_lease_handle;
1244 op_data->op_mirror_id = ioc.lil_mirror_id;
1245 rc = md_file_resync(sbi->ll_md_exp, op_data);
1251 ll_finish_md_op_data(op_data);
1255 int ll_merge_attr(const struct lu_env *env, struct inode *inode)
1257 struct ll_inode_info *lli = ll_i2info(inode);
1258 struct cl_object *obj = lli->lli_clob;
1259 struct cl_attr *attr = vvp_env_thread_attr(env);
1267 ll_inode_size_lock(inode);
1269 /* Merge timestamps the most recently obtained from MDS with
1270 * timestamps obtained from OSTs.
1272 * Do not overwrite atime of inode because it may be refreshed
1273 * by file_accessed() function. If the read was served by cache
1274 * data, there is no RPC to be sent so that atime may not be
1275 * transferred to OSTs at all. MDT only updates atime at close time
1276 * if it's at least 'mdd.*.atime_diff' older.
1277 * All in all, the atime in Lustre does not strictly comply with
1278 * POSIX. Solving this problem needs to send an RPC to MDT for each
1279 * read, this will hurt performance.
1281 if (inode->i_atime.tv_sec < lli->lli_atime ||
1282 lli->lli_update_atime) {
1283 inode->i_atime.tv_sec = lli->lli_atime;
1284 lli->lli_update_atime = 0;
1286 inode->i_mtime.tv_sec = lli->lli_mtime;
1287 inode->i_ctime.tv_sec = lli->lli_ctime;
1289 mtime = inode->i_mtime.tv_sec;
1290 atime = inode->i_atime.tv_sec;
1291 ctime = inode->i_ctime.tv_sec;
1293 cl_object_attr_lock(obj);
1294 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_MERGE))
1297 rc = cl_object_attr_get(env, obj, attr);
1298 cl_object_attr_unlock(obj);
1301 GOTO(out_size_unlock, rc = (rc == -ENODATA ? 0 : rc));
1303 if (atime < attr->cat_atime)
1304 atime = attr->cat_atime;
1306 if (ctime < attr->cat_ctime)
1307 ctime = attr->cat_ctime;
1309 if (mtime < attr->cat_mtime)
1310 mtime = attr->cat_mtime;
1312 CDEBUG(D_VFSTRACE, DFID" updating i_size %llu\n",
1313 PFID(&lli->lli_fid), attr->cat_size);
1315 i_size_write(inode, attr->cat_size);
1316 inode->i_blocks = attr->cat_blocks;
1318 inode->i_mtime.tv_sec = mtime;
1319 inode->i_atime.tv_sec = atime;
1320 inode->i_ctime.tv_sec = ctime;
1323 ll_inode_size_unlock(inode);
1329 * Set designated mirror for I/O.
1331 * So far only read, write, and truncated can support to issue I/O to
1332 * designated mirror.
1334 void ll_io_set_mirror(struct cl_io *io, const struct file *file)
1336 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1338 /* clear layout version for generic(non-resync) I/O in case it carries
1339 * stale layout version due to I/O restart */
1340 io->ci_layout_version = 0;
1342 /* FLR: disable non-delay for designated mirror I/O because obviously
1343 * only one mirror is available */
1344 if (fd->fd_designated_mirror > 0) {
1346 io->ci_designated_mirror = fd->fd_designated_mirror;
1347 io->ci_layout_version = fd->fd_layout_version;
1350 CDEBUG(D_VFSTRACE, "%s: desiginated mirror: %d\n",
1351 file->f_path.dentry->d_name.name, io->ci_designated_mirror);
1354 static bool file_is_noatime(const struct file *file)
1356 const struct vfsmount *mnt = file->f_path.mnt;
1357 const struct inode *inode = file_inode((struct file *)file);
1359 /* Adapted from file_accessed() and touch_atime().*/
1360 if (file->f_flags & O_NOATIME)
1363 if (inode->i_flags & S_NOATIME)
1366 if (IS_NOATIME(inode))
1369 if (mnt->mnt_flags & (MNT_NOATIME | MNT_READONLY))
1372 if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
1375 if ((inode->i_sb->s_flags & SB_NODIRATIME) && S_ISDIR(inode->i_mode))
1381 void ll_io_init(struct cl_io *io, struct file *file, enum cl_io_type iot)
1383 struct inode *inode = file_inode(file);
1384 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1386 io->u.ci_rw.crw_nonblock = file->f_flags & O_NONBLOCK;
1387 io->ci_lock_no_expand = fd->ll_lock_no_expand;
1389 if (iot == CIT_WRITE) {
1390 io->u.ci_wr.wr_append = !!(file->f_flags & O_APPEND);
1391 io->u.ci_wr.wr_sync = !!(file->f_flags & O_SYNC ||
1392 file->f_flags & O_DIRECT ||
1395 io->ci_obj = ll_i2info(inode)->lli_clob;
1396 io->ci_lockreq = CILR_MAYBE;
1397 if (ll_file_nolock(file)) {
1398 io->ci_lockreq = CILR_NEVER;
1399 io->ci_no_srvlock = 1;
1400 } else if (file->f_flags & O_APPEND) {
1401 io->ci_lockreq = CILR_MANDATORY;
1403 io->ci_noatime = file_is_noatime(file);
1404 io->ci_async_readahead = false;
1406 /* FLR: only use non-delay I/O for read as there is only one
1407 * avaliable mirror for write. */
1408 io->ci_ndelay = !(iot == CIT_WRITE);
1410 ll_io_set_mirror(io, file);
1413 static void ll_heat_add(struct inode *inode, enum cl_io_type iot,
1416 struct ll_inode_info *lli = ll_i2info(inode);
1417 struct ll_sb_info *sbi = ll_i2sbi(inode);
1418 enum obd_heat_type sample_type;
1419 enum obd_heat_type iobyte_type;
1420 __u64 now = ktime_get_real_seconds();
1422 if (!ll_sbi_has_file_heat(sbi) ||
1423 lli->lli_heat_flags & LU_HEAT_FLAG_OFF)
1426 if (iot == CIT_READ) {
1427 sample_type = OBD_HEAT_READSAMPLE;
1428 iobyte_type = OBD_HEAT_READBYTE;
1429 } else if (iot == CIT_WRITE) {
1430 sample_type = OBD_HEAT_WRITESAMPLE;
1431 iobyte_type = OBD_HEAT_WRITEBYTE;
1436 spin_lock(&lli->lli_heat_lock);
1437 obd_heat_add(&lli->lli_heat_instances[sample_type], now, 1,
1438 sbi->ll_heat_decay_weight, sbi->ll_heat_period_second);
1439 obd_heat_add(&lli->lli_heat_instances[iobyte_type], now, count,
1440 sbi->ll_heat_decay_weight, sbi->ll_heat_period_second);
1441 spin_unlock(&lli->lli_heat_lock);
1445 ll_file_io_generic(const struct lu_env *env, struct vvp_io_args *args,
1446 struct file *file, enum cl_io_type iot,
1447 loff_t *ppos, size_t count)
1449 struct vvp_io *vio = vvp_env_io(env);
1450 struct inode *inode = file_inode(file);
1451 struct ll_inode_info *lli = ll_i2info(inode);
1452 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1453 struct range_lock range;
1457 unsigned retried = 0;
1458 bool restarted = false;
1462 CDEBUG(D_VFSTRACE, "%s: %s ppos: %llu, count: %zu\n",
1463 file_dentry(file)->d_name.name,
1464 iot == CIT_READ ? "read" : "write", *ppos, count);
1467 io = vvp_env_thread_io(env);
1468 ll_io_init(io, file, iot);
1469 io->ci_ndelay_tried = retried;
1471 if (cl_io_rw_init(env, io, iot, *ppos, count) == 0) {
1472 bool range_locked = false;
1474 if (file->f_flags & O_APPEND)
1475 range_lock_init(&range, 0, LUSTRE_EOF);
1477 range_lock_init(&range, *ppos, *ppos + count - 1);
1479 vio->vui_fd = LUSTRE_FPRIVATE(file);
1480 vio->vui_io_subtype = args->via_io_subtype;
1482 switch (vio->vui_io_subtype) {
1484 vio->vui_iter = args->u.normal.via_iter;
1485 vio->vui_iocb = args->u.normal.via_iocb;
1486 /* Direct IO reads must also take range lock,
1487 * or multiple reads will try to work on the same pages
1488 * See LU-6227 for details. */
1489 if (((iot == CIT_WRITE) ||
1490 (iot == CIT_READ && (file->f_flags & O_DIRECT))) &&
1491 !(vio->vui_fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
1492 CDEBUG(D_VFSTRACE, "Range lock "RL_FMT"\n",
1494 rc = range_lock(&lli->lli_write_tree, &range);
1498 range_locked = true;
1502 vio->u.splice.vui_pipe = args->u.splice.via_pipe;
1503 vio->u.splice.vui_flags = args->u.splice.via_flags;
1506 CERROR("unknown IO subtype %u\n", vio->vui_io_subtype);
1510 ll_cl_add(file, env, io, LCC_RW);
1511 rc = cl_io_loop(env, io);
1512 ll_cl_remove(file, env);
1515 CDEBUG(D_VFSTRACE, "Range unlock "RL_FMT"\n",
1517 range_unlock(&lli->lli_write_tree, &range);
1520 /* cl_io_rw_init() handled IO */
1524 if (io->ci_nob > 0) {
1525 result += io->ci_nob;
1526 count -= io->ci_nob;
1527 *ppos = io->u.ci_wr.wr.crw_pos; /* for splice */
1529 /* prepare IO restart */
1530 if (count > 0 && args->via_io_subtype == IO_NORMAL)
1531 args->u.normal.via_iter = vio->vui_iter;
1534 cl_io_fini(env, io);
1537 "%s: %d io complete with rc: %d, result: %zd, restart: %d\n",
1538 file->f_path.dentry->d_name.name,
1539 iot, rc, result, io->ci_need_restart);
1541 if ((rc == 0 || rc == -ENODATA) && count > 0 && io->ci_need_restart) {
1543 "%s: restart %s from %lld, count: %zu, ret: %zd, rc: %d\n",
1544 file_dentry(file)->d_name.name,
1545 iot == CIT_READ ? "read" : "write",
1546 *ppos, count, result, rc);
1547 /* preserve the tried count for FLR */
1548 retried = io->ci_ndelay_tried;
1553 if (iot == CIT_READ) {
1555 ll_stats_ops_tally(ll_i2sbi(inode),
1556 LPROC_LL_READ_BYTES, result);
1557 } else if (iot == CIT_WRITE) {
1559 ll_stats_ops_tally(ll_i2sbi(inode),
1560 LPROC_LL_WRITE_BYTES, result);
1561 fd->fd_write_failed = false;
1562 } else if (result == 0 && rc == 0) {
1565 fd->fd_write_failed = true;
1567 fd->fd_write_failed = false;
1568 } else if (rc != -ERESTARTSYS) {
1569 fd->fd_write_failed = true;
1573 CDEBUG(D_VFSTRACE, "iot: %d, result: %zd\n", iot, result);
1575 ll_heat_add(inode, iot, result);
1577 RETURN(result > 0 ? result : rc);
1581 * The purpose of fast read is to overcome per I/O overhead and improve IOPS
1582 * especially for small I/O.
1584 * To serve a read request, CLIO has to create and initialize a cl_io and
1585 * then request DLM lock. This has turned out to have siginificant overhead
1586 * and affects the performance of small I/O dramatically.
1588 * It's not necessary to create a cl_io for each I/O. Under the help of read
1589 * ahead, most of the pages being read are already in memory cache and we can
1590 * read those pages directly because if the pages exist, the corresponding DLM
1591 * lock must exist so that page content must be valid.
1593 * In fast read implementation, the llite speculatively finds and reads pages
1594 * in memory cache. There are three scenarios for fast read:
1595 * - If the page exists and is uptodate, kernel VM will provide the data and
1596 * CLIO won't be intervened;
1597 * - If the page was brought into memory by read ahead, it will be exported
1598 * and read ahead parameters will be updated;
1599 * - Otherwise the page is not in memory, we can't do fast read. Therefore,
1600 * it will go back and invoke normal read, i.e., a cl_io will be created
1601 * and DLM lock will be requested.
1603 * POSIX compliance: posix standard states that read is intended to be atomic.
1604 * Lustre read implementation is in line with Linux kernel read implementation
1605 * and neither of them complies with POSIX standard in this matter. Fast read
1606 * doesn't make the situation worse on single node but it may interleave write
1607 * results from multiple nodes due to short read handling in ll_file_aio_read().
1609 * \param env - lu_env
1610 * \param iocb - kiocb from kernel
1611 * \param iter - user space buffers where the data will be copied
1613 * \retval - number of bytes have been read, or error code if error occurred.
1616 ll_do_fast_read(struct kiocb *iocb, struct iov_iter *iter)
1620 if (!ll_sbi_has_fast_read(ll_i2sbi(file_inode(iocb->ki_filp))))
1623 /* NB: we can't do direct IO for fast read because it will need a lock
1624 * to make IO engine happy. */
1625 if (iocb->ki_filp->f_flags & O_DIRECT)
1628 result = generic_file_read_iter(iocb, iter);
1630 /* If the first page is not in cache, generic_file_aio_read() will be
1631 * returned with -ENODATA.
1632 * See corresponding code in ll_readpage(). */
1633 if (result == -ENODATA)
1637 ll_heat_add(file_inode(iocb->ki_filp), CIT_READ, result);
1638 ll_stats_ops_tally(ll_i2sbi(file_inode(iocb->ki_filp)),
1639 LPROC_LL_READ_BYTES, result);
1646 * Read from a file (through the page cache).
1648 static ssize_t ll_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
1651 struct vvp_io_args *args;
1657 if (!iov_iter_count(to))
1661 * Currently when PCC read failed, we do not fall back to the
1662 * normal read path, just return the error.
1663 * The resaon is that: for RW-PCC, the file data may be modified
1664 * in the PCC and inconsistent with the data on OSTs (or file
1665 * data has been removed from the Lustre file system), at this
1666 * time, fallback to the normal read path may read the wrong
1668 * TODO: for RO-PCC (readonly PCC), fall back to normal read
1669 * path: read data from data copy on OSTs.
1671 result = pcc_file_read_iter(iocb, to, &cached);
1675 ll_ras_enter(iocb->ki_filp);
1677 result = ll_do_fast_read(iocb, to);
1678 if (result < 0 || iov_iter_count(to) == 0)
1681 env = cl_env_get(&refcheck);
1683 return PTR_ERR(env);
1685 args = ll_env_args(env, IO_NORMAL);
1686 args->u.normal.via_iter = to;
1687 args->u.normal.via_iocb = iocb;
1689 rc2 = ll_file_io_generic(env, args, iocb->ki_filp, CIT_READ,
1690 &iocb->ki_pos, iov_iter_count(to));
1693 else if (result == 0)
1696 cl_env_put(env, &refcheck);
1702 * Similar trick to ll_do_fast_read, this improves write speed for tiny writes.
1703 * If a page is already in the page cache and dirty (and some other things -
1704 * See ll_tiny_write_begin for the instantiation of these rules), then we can
1705 * write to it without doing a full I/O, because Lustre already knows about it
1706 * and will write it out. This saves a lot of processing time.
1708 * All writes here are within one page, so exclusion is handled by the page
1709 * lock on the vm page. We do not do tiny writes for writes which touch
1710 * multiple pages because it's very unlikely multiple sequential pages are
1711 * are already dirty.
1713 * We limit these to < PAGE_SIZE because PAGE_SIZE writes are relatively common
1714 * and are unlikely to be to already dirty pages.
1716 * Attribute updates are important here, we do them in ll_tiny_write_end.
1718 static ssize_t ll_do_tiny_write(struct kiocb *iocb, struct iov_iter *iter)
1720 ssize_t count = iov_iter_count(iter);
1721 struct file *file = iocb->ki_filp;
1722 struct inode *inode = file_inode(file);
1723 bool lock_inode = !IS_NOSEC(inode);
1728 /* Restrict writes to single page and < PAGE_SIZE. See comment at top
1729 * of function for why.
1731 if (count >= PAGE_SIZE ||
1732 (iocb->ki_pos & (PAGE_SIZE-1)) + count > PAGE_SIZE)
1735 if (unlikely(lock_inode))
1737 result = __generic_file_write_iter(iocb, iter);
1739 if (unlikely(lock_inode))
1740 inode_unlock(inode);
1742 /* If the page is not already dirty, ll_tiny_write_begin returns
1743 * -ENODATA. We continue on to normal write.
1745 if (result == -ENODATA)
1749 ll_heat_add(inode, CIT_WRITE, result);
1750 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_WRITE_BYTES,
1752 ll_file_set_flag(ll_i2info(inode), LLIF_DATA_MODIFIED);
1755 CDEBUG(D_VFSTRACE, "result: %zu, original count %zu\n", result, count);
1761 * Write to a file (through the page cache).
1763 static ssize_t ll_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
1765 struct vvp_io_args *args;
1767 ssize_t rc_tiny = 0, rc_normal;
1774 if (!iov_iter_count(from))
1775 GOTO(out, rc_normal = 0);
1778 * When PCC write failed, we usually do not fall back to the normal
1779 * write path, just return the error. But there is a special case when
1780 * returned error code is -ENOSPC due to running out of space on PCC HSM
1781 * bakcend. At this time, it will fall back to normal I/O path and
1782 * retry the I/O. As the file is in HSM released state, it will restore
1783 * the file data to OSTs first and redo the write again. And the
1784 * restore process will revoke the layout lock and detach the file
1785 * from PCC cache automatically.
1787 result = pcc_file_write_iter(iocb, from, &cached);
1788 if (cached && result != -ENOSPC && result != -EDQUOT)
1791 /* NB: we can't do direct IO for tiny writes because they use the page
1792 * cache, we can't do sync writes because tiny writes can't flush
1793 * pages, and we can't do append writes because we can't guarantee the
1794 * required DLM locks are held to protect file size.
1796 if (ll_sbi_has_tiny_write(ll_i2sbi(file_inode(iocb->ki_filp))) &&
1797 !(iocb->ki_filp->f_flags & (O_DIRECT | O_SYNC | O_APPEND)))
1798 rc_tiny = ll_do_tiny_write(iocb, from);
1800 /* In case of error, go on and try normal write - Only stop if tiny
1801 * write completed I/O.
1803 if (iov_iter_count(from) == 0)
1804 GOTO(out, rc_normal = rc_tiny);
1806 env = cl_env_get(&refcheck);
1808 return PTR_ERR(env);
1810 args = ll_env_args(env, IO_NORMAL);
1811 args->u.normal.via_iter = from;
1812 args->u.normal.via_iocb = iocb;
1814 rc_normal = ll_file_io_generic(env, args, iocb->ki_filp, CIT_WRITE,
1815 &iocb->ki_pos, iov_iter_count(from));
1817 /* On success, combine bytes written. */
1818 if (rc_tiny >= 0 && rc_normal > 0)
1819 rc_normal += rc_tiny;
1820 /* On error, only return error from normal write if tiny write did not
1821 * write any bytes. Otherwise return bytes written by tiny write.
1823 else if (rc_tiny > 0)
1824 rc_normal = rc_tiny;
1826 cl_env_put(env, &refcheck);
1831 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
1833 * XXX: exact copy from kernel code (__generic_file_aio_write_nolock)
1835 static int ll_file_get_iov_count(const struct iovec *iov,
1836 unsigned long *nr_segs, size_t *count)
1841 for (seg = 0; seg < *nr_segs; seg++) {
1842 const struct iovec *iv = &iov[seg];
1845 * If any segment has a negative length, or the cumulative
1846 * length ever wraps negative then return -EINVAL.
1849 if (unlikely((ssize_t)(cnt|iv->iov_len) < 0))
1851 if (access_ok(VERIFY_READ, iv->iov_base, iv->iov_len))
1856 cnt -= iv->iov_len; /* This segment is no good */
1863 static ssize_t ll_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
1864 unsigned long nr_segs, loff_t pos)
1871 result = ll_file_get_iov_count(iov, &nr_segs, &iov_count);
1878 # ifdef HAVE_IOV_ITER_INIT_DIRECTION
1879 iov_iter_init(&to, READ, iov, nr_segs, iov_count);
1880 # else /* !HAVE_IOV_ITER_INIT_DIRECTION */
1881 iov_iter_init(&to, iov, nr_segs, iov_count, 0);
1882 # endif /* HAVE_IOV_ITER_INIT_DIRECTION */
1884 result = ll_file_read_iter(iocb, &to);
1889 static ssize_t ll_file_read(struct file *file, char __user *buf, size_t count,
1892 struct iovec iov = { .iov_base = buf, .iov_len = count };
1901 init_sync_kiocb(&kiocb, file);
1902 kiocb.ki_pos = *ppos;
1903 #ifdef HAVE_KIOCB_KI_LEFT
1904 kiocb.ki_left = count;
1905 #elif defined(HAVE_KI_NBYTES)
1906 kiocb.i_nbytes = count;
1909 result = ll_file_aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
1910 *ppos = kiocb.ki_pos;
1916 * Write to a file (through the page cache).
1919 static ssize_t ll_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
1920 unsigned long nr_segs, loff_t pos)
1922 struct iov_iter from;
1927 result = ll_file_get_iov_count(iov, &nr_segs, &iov_count);
1934 # ifdef HAVE_IOV_ITER_INIT_DIRECTION
1935 iov_iter_init(&from, WRITE, iov, nr_segs, iov_count);
1936 # else /* !HAVE_IOV_ITER_INIT_DIRECTION */
1937 iov_iter_init(&from, iov, nr_segs, iov_count, 0);
1938 # endif /* HAVE_IOV_ITER_INIT_DIRECTION */
1940 result = ll_file_write_iter(iocb, &from);
1945 static ssize_t ll_file_write(struct file *file, const char __user *buf,
1946 size_t count, loff_t *ppos)
1948 struct iovec iov = { .iov_base = (void __user *)buf,
1958 init_sync_kiocb(&kiocb, file);
1959 kiocb.ki_pos = *ppos;
1960 #ifdef HAVE_KIOCB_KI_LEFT
1961 kiocb.ki_left = count;
1962 #elif defined(HAVE_KI_NBYTES)
1963 kiocb.ki_nbytes = count;
1966 result = ll_file_aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
1967 *ppos = kiocb.ki_pos;
1971 #endif /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
1974 * Send file content (through pagecache) somewhere with helper
1976 static ssize_t ll_file_splice_read(struct file *in_file, loff_t *ppos,
1977 struct pipe_inode_info *pipe, size_t count,
1981 struct vvp_io_args *args;
1988 result = pcc_file_splice_read(in_file, ppos, pipe,
1989 count, flags, &cached);
1993 ll_ras_enter(in_file);
1995 env = cl_env_get(&refcheck);
1997 RETURN(PTR_ERR(env));
1999 args = ll_env_args(env, IO_SPLICE);
2000 args->u.splice.via_pipe = pipe;
2001 args->u.splice.via_flags = flags;
2003 result = ll_file_io_generic(env, args, in_file, CIT_READ, ppos, count);
2004 cl_env_put(env, &refcheck);
2008 int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry,
2009 __u64 flags, struct lov_user_md *lum, int lum_size)
2011 struct lookup_intent oit = {
2013 .it_flags = flags | MDS_OPEN_BY_FID,
2018 if ((__swab32(lum->lmm_magic) & le32_to_cpu(LOV_MAGIC_MASK)) ==
2019 le32_to_cpu(LOV_MAGIC_MAGIC)) {
2020 /* this code will only exist for big-endian systems */
2021 lustre_swab_lov_user_md(lum);
2024 ll_inode_size_lock(inode);
2025 rc = ll_intent_file_open(dentry, lum, lum_size, &oit);
2027 GOTO(out_unlock, rc);
2029 ll_release_openhandle(dentry, &oit);
2032 ll_inode_size_unlock(inode);
2033 ll_intent_release(&oit);
2038 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
2039 struct lov_mds_md **lmmp, int *lmm_size,
2040 struct ptlrpc_request **request)
2042 struct ll_sb_info *sbi = ll_i2sbi(inode);
2043 struct mdt_body *body;
2044 struct lov_mds_md *lmm = NULL;
2045 struct ptlrpc_request *req = NULL;
2046 struct md_op_data *op_data;
2049 rc = ll_get_default_mdsize(sbi, &lmmsize);
2053 op_data = ll_prep_md_op_data(NULL, inode, NULL, filename,
2054 strlen(filename), lmmsize,
2055 LUSTRE_OPC_ANY, NULL);
2056 if (IS_ERR(op_data))
2057 RETURN(PTR_ERR(op_data));
2059 op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
2060 rc = md_getattr_name(sbi->ll_md_exp, op_data, &req);
2061 ll_finish_md_op_data(op_data);
2063 CDEBUG(D_INFO, "md_getattr_name failed "
2064 "on %s: rc %d\n", filename, rc);
2068 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2069 LASSERT(body != NULL); /* checked by mdc_getattr_name */
2071 lmmsize = body->mbo_eadatasize;
2073 if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
2075 GOTO(out, rc = -ENODATA);
2078 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, lmmsize);
2079 LASSERT(lmm != NULL);
2081 if (lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V1) &&
2082 lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V3) &&
2083 lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_COMP_V1) &&
2084 lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_FOREIGN))
2085 GOTO(out, rc = -EPROTO);
2088 * This is coming from the MDS, so is probably in
2089 * little endian. We convert it to host endian before
2090 * passing it to userspace.
2092 if ((lmm->lmm_magic & __swab32(LOV_MAGIC_MAGIC)) ==
2093 __swab32(LOV_MAGIC_MAGIC)) {
2094 int stripe_count = 0;
2096 if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V1) ||
2097 lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V3)) {
2098 stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
2099 if (le32_to_cpu(lmm->lmm_pattern) &
2100 LOV_PATTERN_F_RELEASED)
2104 lustre_swab_lov_user_md((struct lov_user_md *)lmm);
2106 /* if function called for directory - we should
2107 * avoid swab not existent lsm objects */
2108 if (lmm->lmm_magic == LOV_MAGIC_V1 && S_ISREG(body->mbo_mode))
2109 lustre_swab_lov_user_md_objects(
2110 ((struct lov_user_md_v1 *)lmm)->lmm_objects,
2112 else if (lmm->lmm_magic == LOV_MAGIC_V3 &&
2113 S_ISREG(body->mbo_mode))
2114 lustre_swab_lov_user_md_objects(
2115 ((struct lov_user_md_v3 *)lmm)->lmm_objects,
2121 *lmm_size = lmmsize;
2126 static int ll_lov_setea(struct inode *inode, struct file *file,
2129 __u64 flags = MDS_OPEN_HAS_OBJS | FMODE_WRITE;
2130 struct lov_user_md *lump;
2131 int lum_size = sizeof(struct lov_user_md) +
2132 sizeof(struct lov_user_ost_data);
2136 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2139 OBD_ALLOC_LARGE(lump, lum_size);
2143 if (copy_from_user(lump, arg, lum_size))
2144 GOTO(out_lump, rc = -EFAULT);
2146 rc = ll_lov_setstripe_ea_info(inode, file_dentry(file), flags, lump,
2148 cl_lov_delay_create_clear(&file->f_flags);
2151 OBD_FREE_LARGE(lump, lum_size);
2155 static int ll_file_getstripe(struct inode *inode, void __user *lum, size_t size)
2162 env = cl_env_get(&refcheck);
2164 RETURN(PTR_ERR(env));
2166 rc = cl_object_getstripe(env, ll_i2info(inode)->lli_clob, lum, size);
2167 cl_env_put(env, &refcheck);
2171 static int ll_lov_setstripe(struct inode *inode, struct file *file,
2174 struct lov_user_md __user *lum = (struct lov_user_md __user *)arg;
2175 struct lov_user_md *klum;
2177 __u64 flags = FMODE_WRITE;
2180 rc = ll_copy_user_md(lum, &klum);
2185 rc = ll_lov_setstripe_ea_info(inode, file_dentry(file), flags, klum,
2190 rc = put_user(0, &lum->lmm_stripe_count);
2194 rc = ll_layout_refresh(inode, &gen);
2198 rc = ll_file_getstripe(inode, arg, lum_size);
2200 cl_lov_delay_create_clear(&file->f_flags);
2203 OBD_FREE_LARGE(klum, lum_size);
2208 ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg)
2210 struct ll_inode_info *lli = ll_i2info(inode);
2211 struct cl_object *obj = lli->lli_clob;
2212 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2213 struct ll_grouplock grouplock;
2218 CWARN("group id for group lock must not be 0\n");
2222 if (ll_file_nolock(file))
2223 RETURN(-EOPNOTSUPP);
2225 spin_lock(&lli->lli_lock);
2226 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
2227 CWARN("group lock already existed with gid %lu\n",
2228 fd->fd_grouplock.lg_gid);
2229 spin_unlock(&lli->lli_lock);
2232 LASSERT(fd->fd_grouplock.lg_lock == NULL);
2233 spin_unlock(&lli->lli_lock);
2236 * XXX: group lock needs to protect all OST objects while PFL
2237 * can add new OST objects during the IO, so we'd instantiate
2238 * all OST objects before getting its group lock.
2243 struct cl_layout cl = {
2244 .cl_is_composite = false,
2246 struct lu_extent ext = {
2248 .e_end = OBD_OBJECT_EOF,
2251 env = cl_env_get(&refcheck);
2253 RETURN(PTR_ERR(env));
2255 rc = cl_object_layout_get(env, obj, &cl);
2256 if (!rc && cl.cl_is_composite)
2257 rc = ll_layout_write_intent(inode, LAYOUT_INTENT_WRITE,
2260 cl_env_put(env, &refcheck);
2265 rc = cl_get_grouplock(ll_i2info(inode)->lli_clob,
2266 arg, (file->f_flags & O_NONBLOCK), &grouplock);
2270 spin_lock(&lli->lli_lock);
2271 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
2272 spin_unlock(&lli->lli_lock);
2273 CERROR("another thread just won the race\n");
2274 cl_put_grouplock(&grouplock);
2278 fd->fd_flags |= LL_FILE_GROUP_LOCKED;
2279 fd->fd_grouplock = grouplock;
2280 spin_unlock(&lli->lli_lock);
2282 CDEBUG(D_INFO, "group lock %lu obtained\n", arg);
2286 static int ll_put_grouplock(struct inode *inode, struct file *file,
2289 struct ll_inode_info *lli = ll_i2info(inode);
2290 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2291 struct ll_grouplock grouplock;
2294 spin_lock(&lli->lli_lock);
2295 if (!(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
2296 spin_unlock(&lli->lli_lock);
2297 CWARN("no group lock held\n");
2301 LASSERT(fd->fd_grouplock.lg_lock != NULL);
2303 if (fd->fd_grouplock.lg_gid != arg) {
2304 CWARN("group lock %lu doesn't match current id %lu\n",
2305 arg, fd->fd_grouplock.lg_gid);
2306 spin_unlock(&lli->lli_lock);
2310 grouplock = fd->fd_grouplock;
2311 memset(&fd->fd_grouplock, 0, sizeof(fd->fd_grouplock));
2312 fd->fd_flags &= ~LL_FILE_GROUP_LOCKED;
2313 spin_unlock(&lli->lli_lock);
2315 cl_put_grouplock(&grouplock);
2316 CDEBUG(D_INFO, "group lock %lu released\n", arg);
2321 * Close inode open handle
2323 * \param dentry [in] dentry which contains the inode
2324 * \param it [in,out] intent which contains open info and result
2327 * \retval <0 failure
2329 int ll_release_openhandle(struct dentry *dentry, struct lookup_intent *it)
2331 struct inode *inode = dentry->d_inode;
2332 struct obd_client_handle *och;
2338 /* Root ? Do nothing. */
2339 if (dentry->d_inode->i_sb->s_root == dentry)
2342 /* No open handle to close? Move away */
2343 if (!it_disposition(it, DISP_OPEN_OPEN))
2346 LASSERT(it_open_error(DISP_OPEN_OPEN, it) == 0);
2348 OBD_ALLOC(och, sizeof(*och));
2350 GOTO(out, rc = -ENOMEM);
2352 ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och);
2354 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
2356 /* this one is in place of ll_file_open */
2357 if (it_disposition(it, DISP_ENQ_OPEN_REF)) {
2358 ptlrpc_req_finished(it->it_request);
2359 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
2365 * Get size for inode for which FIEMAP mapping is requested.
2366 * Make the FIEMAP get_info call and returns the result.
2367 * \param fiemap kernel buffer to hold extens
2368 * \param num_bytes kernel buffer size
2370 static int ll_do_fiemap(struct inode *inode, struct fiemap *fiemap,
2376 struct ll_fiemap_info_key fmkey = { .lfik_name = KEY_FIEMAP, };
2379 /* Checks for fiemap flags */
2380 if (fiemap->fm_flags & ~LUSTRE_FIEMAP_FLAGS_COMPAT) {
2381 fiemap->fm_flags &= ~LUSTRE_FIEMAP_FLAGS_COMPAT;
2385 /* Check for FIEMAP_FLAG_SYNC */
2386 if (fiemap->fm_flags & FIEMAP_FLAG_SYNC) {
2387 rc = filemap_fdatawrite(inode->i_mapping);
2392 env = cl_env_get(&refcheck);
2394 RETURN(PTR_ERR(env));
2396 if (i_size_read(inode) == 0) {
2397 rc = ll_glimpse_size(inode);
2402 fmkey.lfik_oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
2403 obdo_from_inode(&fmkey.lfik_oa, inode, OBD_MD_FLSIZE);
2404 obdo_set_parent_fid(&fmkey.lfik_oa, &ll_i2info(inode)->lli_fid);
2406 /* If filesize is 0, then there would be no objects for mapping */
2407 if (fmkey.lfik_oa.o_size == 0) {
2408 fiemap->fm_mapped_extents = 0;
2412 fmkey.lfik_fiemap = *fiemap;
2414 rc = cl_object_fiemap(env, ll_i2info(inode)->lli_clob,
2415 &fmkey, fiemap, &num_bytes);
2417 cl_env_put(env, &refcheck);
2421 int ll_fid2path(struct inode *inode, void __user *arg)
2423 struct obd_export *exp = ll_i2mdexp(inode);
2424 const struct getinfo_fid2path __user *gfin = arg;
2426 struct getinfo_fid2path *gfout;
2432 if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2433 !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2436 /* Only need to get the buflen */
2437 if (get_user(pathlen, &gfin->gf_pathlen))
2440 if (pathlen > PATH_MAX)
2443 outsize = sizeof(*gfout) + pathlen;
2444 OBD_ALLOC(gfout, outsize);
2448 if (copy_from_user(gfout, arg, sizeof(*gfout)))
2449 GOTO(gf_free, rc = -EFAULT);
2450 /* append root FID after gfout to let MDT know the root FID so that it
2451 * can lookup the correct path, this is mainly for fileset.
2452 * old server without fileset mount support will ignore this. */
2453 *gfout->gf_u.gf_root_fid = *ll_inode2fid(inode);
2455 /* Call mdc_iocontrol */
2456 rc = obd_iocontrol(OBD_IOC_FID2PATH, exp, outsize, gfout, NULL);
2460 if (copy_to_user(arg, gfout, outsize))
2464 OBD_FREE(gfout, outsize);
2469 ll_ioc_data_version(struct inode *inode, struct ioc_data_version *ioc)
2471 struct cl_object *obj = ll_i2info(inode)->lli_clob;
2479 ioc->idv_version = 0;
2480 ioc->idv_layout_version = UINT_MAX;
2482 /* If no file object initialized, we consider its version is 0. */
2486 env = cl_env_get(&refcheck);
2488 RETURN(PTR_ERR(env));
2490 io = vvp_env_thread_io(env);
2492 io->u.ci_data_version.dv_data_version = 0;
2493 io->u.ci_data_version.dv_layout_version = UINT_MAX;
2494 io->u.ci_data_version.dv_flags = ioc->idv_flags;
2497 if (cl_io_init(env, io, CIT_DATA_VERSION, io->ci_obj) == 0)
2498 result = cl_io_loop(env, io);
2500 result = io->ci_result;
2502 ioc->idv_version = io->u.ci_data_version.dv_data_version;
2503 ioc->idv_layout_version = io->u.ci_data_version.dv_layout_version;
2505 cl_io_fini(env, io);
2507 if (unlikely(io->ci_need_restart))
2510 cl_env_put(env, &refcheck);
2516 * Read the data_version for inode.
2518 * This value is computed using stripe object version on OST.
2519 * Version is computed using server side locking.
2521 * @param flags if do sync on the OST side;
2523 * LL_DV_RD_FLUSH: flush dirty pages, LCK_PR on OSTs
2524 * LL_DV_WR_FLUSH: drop all caching pages, LCK_PW on OSTs
2526 int ll_data_version(struct inode *inode, __u64 *data_version, int flags)
2528 struct ioc_data_version ioc = { .idv_flags = flags };
2531 rc = ll_ioc_data_version(inode, &ioc);
2533 *data_version = ioc.idv_version;
2539 * Trigger a HSM release request for the provided inode.
2541 int ll_hsm_release(struct inode *inode)
2544 struct obd_client_handle *och = NULL;
2545 __u64 data_version = 0;
2550 CDEBUG(D_INODE, "%s: Releasing file "DFID".\n",
2551 ll_i2sbi(inode)->ll_fsname,
2552 PFID(&ll_i2info(inode)->lli_fid));
2554 och = ll_lease_open(inode, NULL, FMODE_WRITE, MDS_OPEN_RELEASE);
2556 GOTO(out, rc = PTR_ERR(och));
2558 /* Grab latest data_version and [am]time values */
2559 rc = ll_data_version(inode, &data_version, LL_DV_WR_FLUSH);
2563 env = cl_env_get(&refcheck);
2565 GOTO(out, rc = PTR_ERR(env));
2567 rc = ll_merge_attr(env, inode);
2568 cl_env_put(env, &refcheck);
2570 /* If error happen, we have the wrong size for a file.
2576 /* Release the file.
2577 * NB: lease lock handle is released in mdc_hsm_release_pack() because
2578 * we still need it to pack l_remote_handle to MDT. */
2579 rc = ll_close_inode_openhandle(inode, och, MDS_HSM_RELEASE,
2585 if (och != NULL && !IS_ERR(och)) /* close the file */
2586 ll_lease_close(och, inode, NULL);
2591 struct ll_swap_stack {
2594 struct inode *inode1;
2595 struct inode *inode2;
2600 static int ll_swap_layouts(struct file *file1, struct file *file2,
2601 struct lustre_swap_layouts *lsl)
2603 struct mdc_swap_layouts msl;
2604 struct md_op_data *op_data;
2607 struct ll_swap_stack *llss = NULL;
2610 OBD_ALLOC_PTR(llss);
2614 llss->inode1 = file_inode(file1);
2615 llss->inode2 = file_inode(file2);
2617 rc = ll_check_swap_layouts_validity(llss->inode1, llss->inode2);
2621 /* we use 2 bool because it is easier to swap than 2 bits */
2622 if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV1)
2623 llss->check_dv1 = true;
2625 if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV2)
2626 llss->check_dv2 = true;
2628 /* we cannot use lsl->sl_dvX directly because we may swap them */
2629 llss->dv1 = lsl->sl_dv1;
2630 llss->dv2 = lsl->sl_dv2;
2632 rc = lu_fid_cmp(ll_inode2fid(llss->inode1), ll_inode2fid(llss->inode2));
2633 if (rc == 0) /* same file, done! */
2636 if (rc < 0) { /* sequentialize it */
2637 swap(llss->inode1, llss->inode2);
2639 swap(llss->dv1, llss->dv2);
2640 swap(llss->check_dv1, llss->check_dv2);
2644 if (gid != 0) { /* application asks to flush dirty cache */
2645 rc = ll_get_grouplock(llss->inode1, file1, gid);
2649 rc = ll_get_grouplock(llss->inode2, file2, gid);
2651 ll_put_grouplock(llss->inode1, file1, gid);
2656 /* ultimate check, before swaping the layouts we check if
2657 * dataversion has changed (if requested) */
2658 if (llss->check_dv1) {
2659 rc = ll_data_version(llss->inode1, &dv, 0);
2662 if (dv != llss->dv1)
2663 GOTO(putgl, rc = -EAGAIN);
2666 if (llss->check_dv2) {
2667 rc = ll_data_version(llss->inode2, &dv, 0);
2670 if (dv != llss->dv2)
2671 GOTO(putgl, rc = -EAGAIN);
2674 /* struct md_op_data is used to send the swap args to the mdt
2675 * only flags is missing, so we use struct mdc_swap_layouts
2676 * through the md_op_data->op_data */
2677 /* flags from user space have to be converted before they are send to
2678 * server, no flag is sent today, they are only used on the client */
2681 op_data = ll_prep_md_op_data(NULL, llss->inode1, llss->inode2, NULL, 0,
2682 0, LUSTRE_OPC_ANY, &msl);
2683 if (IS_ERR(op_data))
2684 GOTO(free, rc = PTR_ERR(op_data));
2686 rc = obd_iocontrol(LL_IOC_LOV_SWAP_LAYOUTS, ll_i2mdexp(llss->inode1),
2687 sizeof(*op_data), op_data, NULL);
2688 ll_finish_md_op_data(op_data);
2695 ll_put_grouplock(llss->inode2, file2, gid);
2696 ll_put_grouplock(llss->inode1, file1, gid);
2706 int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss)
2708 struct obd_export *exp = ll_i2mdexp(inode);
2709 struct md_op_data *op_data;
2713 /* Detect out-of range masks */
2714 if ((hss->hss_setmask | hss->hss_clearmask) & ~HSM_FLAGS_MASK)
2717 /* Non-root users are forbidden to set or clear flags which are
2718 * NOT defined in HSM_USER_MASK. */
2719 if (((hss->hss_setmask | hss->hss_clearmask) & ~HSM_USER_MASK) &&
2720 !cfs_capable(CFS_CAP_SYS_ADMIN))
2723 if (!exp_connect_archive_id_array(exp)) {
2724 /* Detect out-of range archive id */
2725 if ((hss->hss_valid & HSS_ARCHIVE_ID) &&
2726 (hss->hss_archive_id > LL_HSM_ORIGIN_MAX_ARCHIVE))
2730 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2731 LUSTRE_OPC_ANY, hss);
2732 if (IS_ERR(op_data))
2733 RETURN(PTR_ERR(op_data));
2735 rc = obd_iocontrol(LL_IOC_HSM_STATE_SET, exp, sizeof(*op_data),
2738 ll_finish_md_op_data(op_data);
2743 static int ll_hsm_import(struct inode *inode, struct file *file,
2744 struct hsm_user_import *hui)
2746 struct hsm_state_set *hss = NULL;
2747 struct iattr *attr = NULL;
2751 if (!S_ISREG(inode->i_mode))
2757 GOTO(out, rc = -ENOMEM);
2759 hss->hss_valid = HSS_SETMASK | HSS_ARCHIVE_ID;
2760 hss->hss_archive_id = hui->hui_archive_id;
2761 hss->hss_setmask = HS_ARCHIVED | HS_EXISTS | HS_RELEASED;
2762 rc = ll_hsm_state_set(inode, hss);
2766 OBD_ALLOC_PTR(attr);
2768 GOTO(out, rc = -ENOMEM);
2770 attr->ia_mode = hui->hui_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
2771 attr->ia_mode |= S_IFREG;
2772 attr->ia_uid = make_kuid(&init_user_ns, hui->hui_uid);
2773 attr->ia_gid = make_kgid(&init_user_ns, hui->hui_gid);
2774 attr->ia_size = hui->hui_size;
2775 attr->ia_mtime.tv_sec = hui->hui_mtime;
2776 attr->ia_mtime.tv_nsec = hui->hui_mtime_ns;
2777 attr->ia_atime.tv_sec = hui->hui_atime;
2778 attr->ia_atime.tv_nsec = hui->hui_atime_ns;
2780 attr->ia_valid = ATTR_SIZE | ATTR_MODE | ATTR_FORCE |
2781 ATTR_UID | ATTR_GID |
2782 ATTR_MTIME | ATTR_MTIME_SET |
2783 ATTR_ATIME | ATTR_ATIME_SET;
2787 rc = ll_setattr_raw(file_dentry(file), attr, 0, true);
2791 inode_unlock(inode);
2803 static inline long ll_lease_type_from_fmode(fmode_t fmode)
2805 return ((fmode & FMODE_READ) ? LL_LEASE_RDLCK : 0) |
2806 ((fmode & FMODE_WRITE) ? LL_LEASE_WRLCK : 0);
2809 static int ll_file_futimes_3(struct file *file, const struct ll_futimes_3 *lfu)
2811 struct inode *inode = file_inode(file);
2813 .ia_valid = ATTR_ATIME | ATTR_ATIME_SET |
2814 ATTR_MTIME | ATTR_MTIME_SET |
2817 .tv_sec = lfu->lfu_atime_sec,
2818 .tv_nsec = lfu->lfu_atime_nsec,
2821 .tv_sec = lfu->lfu_mtime_sec,
2822 .tv_nsec = lfu->lfu_mtime_nsec,
2825 .tv_sec = lfu->lfu_ctime_sec,
2826 .tv_nsec = lfu->lfu_ctime_nsec,
2832 if (!capable(CAP_SYS_ADMIN))
2835 if (!S_ISREG(inode->i_mode))
2839 rc = ll_setattr_raw(file_dentry(file), &ia, OP_XVALID_CTIME_SET,
2841 inode_unlock(inode);
2846 static enum cl_lock_mode cl_mode_user_to_kernel(enum lock_mode_user mode)
2849 case MODE_READ_USER:
2851 case MODE_WRITE_USER:
2858 static const char *const user_lockname[] = LOCK_MODE_NAMES;
2860 /* Used to allow the upper layers of the client to request an LDLM lock
2861 * without doing an actual read or write.
2863 * Used for ladvise lockahead to manually request specific locks.
2865 * \param[in] file file this ladvise lock request is on
2866 * \param[in] ladvise ladvise struct describing this lock request
2868 * \retval 0 success, no detailed result available (sync requests
2869 * and requests sent to the server [not handled locally]
2870 * cannot return detailed results)
2871 * \retval LLA_RESULT_{SAME,DIFFERENT} - detailed result of the lock request,
2872 * see definitions for details.
2873 * \retval negative negative errno on error
2875 int ll_file_lock_ahead(struct file *file, struct llapi_lu_ladvise *ladvise)
2877 struct lu_env *env = NULL;
2878 struct cl_io *io = NULL;
2879 struct cl_lock *lock = NULL;
2880 struct cl_lock_descr *descr = NULL;
2881 struct dentry *dentry = file->f_path.dentry;
2882 struct inode *inode = dentry->d_inode;
2883 enum cl_lock_mode cl_mode;
2884 off_t start = ladvise->lla_start;
2885 off_t end = ladvise->lla_end;
2891 CDEBUG(D_VFSTRACE, "Lock request: file=%.*s, inode=%p, mode=%s "
2892 "start=%llu, end=%llu\n", dentry->d_name.len,
2893 dentry->d_name.name, dentry->d_inode,
2894 user_lockname[ladvise->lla_lockahead_mode], (__u64) start,
2897 cl_mode = cl_mode_user_to_kernel(ladvise->lla_lockahead_mode);
2899 GOTO(out, result = cl_mode);
2901 /* Get IO environment */
2902 result = cl_io_get(inode, &env, &io, &refcheck);
2906 result = cl_io_init(env, io, CIT_MISC, io->ci_obj);
2909 * nothing to do for this io. This currently happens when
2910 * stripe sub-object's are not yet created.
2912 result = io->ci_result;
2913 } else if (result == 0) {
2914 lock = vvp_env_lock(env);
2915 descr = &lock->cll_descr;
2917 descr->cld_obj = io->ci_obj;
2918 /* Convert byte offsets to pages */
2919 descr->cld_start = cl_index(io->ci_obj, start);
2920 descr->cld_end = cl_index(io->ci_obj, end);
2921 descr->cld_mode = cl_mode;
2922 /* CEF_MUST is used because we do not want to convert a
2923 * lockahead request to a lockless lock */
2924 descr->cld_enq_flags = CEF_MUST | CEF_LOCK_NO_EXPAND |
2927 if (ladvise->lla_peradvice_flags & LF_ASYNC)
2928 descr->cld_enq_flags |= CEF_SPECULATIVE;
2930 result = cl_lock_request(env, io, lock);
2932 /* On success, we need to release the lock */
2934 cl_lock_release(env, lock);
2936 cl_io_fini(env, io);
2937 cl_env_put(env, &refcheck);
2939 /* -ECANCELED indicates a matching lock with a different extent
2940 * was already present, and -EEXIST indicates a matching lock
2941 * on exactly the same extent was already present.
2942 * We convert them to positive values for userspace to make
2943 * recognizing true errors easier.
2944 * Note we can only return these detailed results on async requests,
2945 * as sync requests look the same as i/o requests for locking. */
2946 if (result == -ECANCELED)
2947 result = LLA_RESULT_DIFFERENT;
2948 else if (result == -EEXIST)
2949 result = LLA_RESULT_SAME;
2954 static const char *const ladvise_names[] = LU_LADVISE_NAMES;
2956 static int ll_ladvise_sanity(struct inode *inode,
2957 struct llapi_lu_ladvise *ladvise)
2959 struct ll_sb_info *sbi = ll_i2sbi(inode);
2960 enum lu_ladvise_type advice = ladvise->lla_advice;
2961 /* Note the peradvice flags is a 32 bit field, so per advice flags must
2962 * be in the first 32 bits of enum ladvise_flags */
2963 __u32 flags = ladvise->lla_peradvice_flags;
2964 /* 3 lines at 80 characters per line, should be plenty */
2967 if (advice > LU_LADVISE_MAX || advice == LU_LADVISE_INVALID) {
2969 CDEBUG(D_VFSTRACE, "%s: advice with value '%d' not recognized,"
2970 "last supported advice is %s (value '%d'): rc = %d\n",
2971 sbi->ll_fsname, advice,
2972 ladvise_names[LU_LADVISE_MAX-1], LU_LADVISE_MAX-1, rc);
2976 /* Per-advice checks */
2978 case LU_LADVISE_LOCKNOEXPAND:
2979 if (flags & ~LF_LOCKNOEXPAND_MASK) {
2981 CDEBUG(D_VFSTRACE, "%s: Invalid flags (%x) for %s: "
2982 "rc = %d\n", sbi->ll_fsname, flags,
2983 ladvise_names[advice], rc);
2987 case LU_LADVISE_LOCKAHEAD:
2988 /* Currently only READ and WRITE modes can be requested */
2989 if (ladvise->lla_lockahead_mode >= MODE_MAX_USER ||
2990 ladvise->lla_lockahead_mode == 0) {
2992 CDEBUG(D_VFSTRACE, "%s: Invalid mode (%d) for %s: "
2993 "rc = %d\n", sbi->ll_fsname,
2994 ladvise->lla_lockahead_mode,
2995 ladvise_names[advice], rc);
2998 case LU_LADVISE_WILLREAD:
2999 case LU_LADVISE_DONTNEED:
3001 /* Note fall through above - These checks apply to all advices
3002 * except LOCKNOEXPAND */
3003 if (flags & ~LF_DEFAULT_MASK) {
3005 CDEBUG(D_VFSTRACE, "%s: Invalid flags (%x) for %s: "
3006 "rc = %d\n", sbi->ll_fsname, flags,
3007 ladvise_names[advice], rc);
3010 if (ladvise->lla_start >= ladvise->lla_end) {
3012 CDEBUG(D_VFSTRACE, "%s: Invalid range (%llu to %llu) "
3013 "for %s: rc = %d\n", sbi->ll_fsname,
3014 ladvise->lla_start, ladvise->lla_end,
3015 ladvise_names[advice], rc);
3027 * Give file access advices
3029 * The ladvise interface is similar to Linux fadvise() system call, except it
3030 * forwards the advices directly from Lustre client to server. The server side
3031 * codes will apply appropriate read-ahead and caching techniques for the
3032 * corresponding files.
3034 * A typical workload for ladvise is e.g. a bunch of different clients are
3035 * doing small random reads of a file, so prefetching pages into OSS cache
3036 * with big linear reads before the random IO is a net benefit. Fetching
3037 * all that data into each client cache with fadvise() may not be, due to
3038 * much more data being sent to the client.
3040 static int ll_ladvise(struct inode *inode, struct file *file, __u64 flags,
3041 struct llapi_lu_ladvise *ladvise)
3045 struct cl_ladvise_io *lio;
3050 env = cl_env_get(&refcheck);
3052 RETURN(PTR_ERR(env));
3054 io = vvp_env_thread_io(env);
3055 io->ci_obj = ll_i2info(inode)->lli_clob;
3057 /* initialize parameters for ladvise */
3058 lio = &io->u.ci_ladvise;
3059 lio->li_start = ladvise->lla_start;
3060 lio->li_end = ladvise->lla_end;
3061 lio->li_fid = ll_inode2fid(inode);
3062 lio->li_advice = ladvise->lla_advice;
3063 lio->li_flags = flags;
3065 if (cl_io_init(env, io, CIT_LADVISE, io->ci_obj) == 0)
3066 rc = cl_io_loop(env, io);
3070 cl_io_fini(env, io);
3071 cl_env_put(env, &refcheck);
3075 static int ll_lock_noexpand(struct file *file, int flags)
3077 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
3079 fd->ll_lock_no_expand = !(flags & LF_UNSET);
3084 int ll_ioctl_fsgetxattr(struct inode *inode, unsigned int cmd,
3087 struct fsxattr fsxattr;
3089 if (copy_from_user(&fsxattr,
3090 (const struct fsxattr __user *)arg,
3094 fsxattr.fsx_xflags = ll_inode_flags_to_xflags(inode->i_flags);
3095 if (ll_file_test_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT))
3096 fsxattr.fsx_xflags |= FS_XFLAG_PROJINHERIT;
3097 fsxattr.fsx_projid = ll_i2info(inode)->lli_projid;
3098 if (copy_to_user((struct fsxattr __user *)arg,
3099 &fsxattr, sizeof(fsxattr)))
3105 int ll_ioctl_check_project(struct inode *inode, struct fsxattr *fa)
3108 * Project Quota ID state is only allowed to change from within the init
3109 * namespace. Enforce that restriction only if we are trying to change
3110 * the quota ID state. Everything else is allowed in user namespaces.
3112 if (current_user_ns() == &init_user_ns)
3115 if (ll_i2info(inode)->lli_projid != fa->fsx_projid)
3118 if (ll_file_test_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT)) {
3119 if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))
3122 if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
3129 int ll_ioctl_fssetxattr(struct inode *inode, unsigned int cmd,
3133 struct md_op_data *op_data;
3134 struct ptlrpc_request *req = NULL;
3136 struct fsxattr fsxattr;
3137 struct cl_object *obj;
3141 if (copy_from_user(&fsxattr,
3142 (const struct fsxattr __user *)arg,
3146 rc = ll_ioctl_check_project(inode, &fsxattr);
3150 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
3151 LUSTRE_OPC_ANY, NULL);
3152 if (IS_ERR(op_data))
3153 RETURN(PTR_ERR(op_data));
3155 flags = ll_xflags_to_inode_flags(fsxattr.fsx_xflags);
3156 op_data->op_attr_flags = ll_inode_to_ext_flags(flags);
3157 if (fsxattr.fsx_xflags & FS_XFLAG_PROJINHERIT)
3158 op_data->op_attr_flags |= LUSTRE_PROJINHERIT_FL;
3159 op_data->op_projid = fsxattr.fsx_projid;
3160 op_data->op_xvalid |= OP_XVALID_PROJID | OP_XVALID_FLAGS;
3161 rc = md_setattr(ll_i2sbi(inode)->ll_md_exp, op_data, NULL,
3163 ptlrpc_req_finished(req);
3165 GOTO(out_fsxattr, rc);
3166 ll_update_inode_flags(inode, op_data->op_attr_flags);
3167 obj = ll_i2info(inode)->lli_clob;
3169 GOTO(out_fsxattr, rc);
3171 OBD_ALLOC_PTR(attr);
3173 GOTO(out_fsxattr, rc = -ENOMEM);
3175 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS,
3176 fsxattr.fsx_xflags);
3179 ll_finish_md_op_data(op_data);
3183 static long ll_file_unlock_lease(struct file *file, struct ll_ioc_lease *ioc,
3186 struct inode *inode = file_inode(file);
3187 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
3188 struct ll_inode_info *lli = ll_i2info(inode);
3189 struct obd_client_handle *och = NULL;
3190 struct split_param sp;
3191 struct pcc_param param;
3192 bool lease_broken = false;
3194 enum mds_op_bias bias = 0;
3195 struct file *layout_file = NULL;
3197 size_t data_size = 0;
3198 bool attached = false;
3203 mutex_lock(&lli->lli_och_mutex);
3204 if (fd->fd_lease_och != NULL) {
3205 och = fd->fd_lease_och;
3206 fd->fd_lease_och = NULL;
3208 mutex_unlock(&lli->lli_och_mutex);
3213 fmode = och->och_flags;
3215 switch (ioc->lil_flags) {
3216 case LL_LEASE_RESYNC_DONE:
3217 if (ioc->lil_count > IOC_IDS_MAX)
3218 GOTO(out_lease_close, rc = -EINVAL);
3220 data_size = offsetof(typeof(*ioc), lil_ids[ioc->lil_count]);
3221 OBD_ALLOC(data, data_size);
3223 GOTO(out_lease_close, rc = -ENOMEM);
3225 if (copy_from_user(data, (void __user *)arg, data_size))
3226 GOTO(out_lease_close, rc = -EFAULT);
3228 bias = MDS_CLOSE_RESYNC_DONE;
3230 case LL_LEASE_LAYOUT_MERGE: {
3233 if (ioc->lil_count != 1)
3234 GOTO(out_lease_close, rc = -EINVAL);
3236 arg += sizeof(*ioc);
3237 if (copy_from_user(&fd, (void __user *)arg, sizeof(__u32)))
3238 GOTO(out_lease_close, rc = -EFAULT);
3240 layout_file = fget(fd);
3242 GOTO(out_lease_close, rc = -EBADF);
3244 if ((file->f_flags & O_ACCMODE) == O_RDONLY ||
3245 (layout_file->f_flags & O_ACCMODE) == O_RDONLY)
3246 GOTO(out_lease_close, rc = -EPERM);
3248 data = file_inode(layout_file);
3249 bias = MDS_CLOSE_LAYOUT_MERGE;
3252 case LL_LEASE_LAYOUT_SPLIT: {
3256 if (ioc->lil_count != 2)
3257 GOTO(out_lease_close, rc = -EINVAL);
3259 arg += sizeof(*ioc);
3260 if (copy_from_user(&fdv, (void __user *)arg, sizeof(__u32)))
3261 GOTO(out_lease_close, rc = -EFAULT);
3263 arg += sizeof(__u32);
3264 if (copy_from_user(&mirror_id, (void __user *)arg,
3266 GOTO(out_lease_close, rc = -EFAULT);
3268 layout_file = fget(fdv);
3270 GOTO(out_lease_close, rc = -EBADF);
3272 sp.sp_inode = file_inode(layout_file);
3273 sp.sp_mirror_id = (__u16)mirror_id;
3275 bias = MDS_CLOSE_LAYOUT_SPLIT;
3278 case LL_LEASE_PCC_ATTACH:
3279 if (ioc->lil_count != 1)
3282 arg += sizeof(*ioc);
3283 if (copy_from_user(¶m.pa_archive_id, (void __user *)arg,
3285 GOTO(out_lease_close, rc2 = -EFAULT);
3287 rc2 = pcc_readwrite_attach(file, inode, param.pa_archive_id);
3289 GOTO(out_lease_close, rc2);
3292 /* Grab latest data version */
3293 rc2 = ll_data_version(inode, ¶m.pa_data_version,
3296 GOTO(out_lease_close, rc2);
3299 bias = MDS_PCC_ATTACH;
3302 /* without close intent */
3307 rc = ll_lease_close_intent(och, inode, &lease_broken, bias, data);
3311 rc = ll_lease_och_release(inode, file);
3320 switch (ioc->lil_flags) {
3321 case LL_LEASE_RESYNC_DONE:
3323 OBD_FREE(data, data_size);
3325 case LL_LEASE_LAYOUT_MERGE:
3326 case LL_LEASE_LAYOUT_SPLIT:
3330 case LL_LEASE_PCC_ATTACH:
3333 rc = pcc_readwrite_attach_fini(file, inode,
3334 param.pa_layout_gen,
3341 rc = ll_lease_type_from_fmode(fmode);
3345 static long ll_file_set_lease(struct file *file, struct ll_ioc_lease *ioc,
3348 struct inode *inode = file_inode(file);
3349 struct ll_inode_info *lli = ll_i2info(inode);
3350 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
3351 struct obd_client_handle *och = NULL;
3352 __u64 open_flags = 0;
3358 switch (ioc->lil_mode) {
3359 case LL_LEASE_WRLCK:
3360 if (!(file->f_mode & FMODE_WRITE))
3362 fmode = FMODE_WRITE;
3364 case LL_LEASE_RDLCK:
3365 if (!(file->f_mode & FMODE_READ))
3369 case LL_LEASE_UNLCK:
3370 RETURN(ll_file_unlock_lease(file, ioc, arg));
3375 CDEBUG(D_INODE, "Set lease with mode %u\n", fmode);
3377 /* apply for lease */
3378 if (ioc->lil_flags & LL_LEASE_RESYNC)
3379 open_flags = MDS_OPEN_RESYNC;
3380 och = ll_lease_open(inode, file, fmode, open_flags);
3382 RETURN(PTR_ERR(och));
3384 if (ioc->lil_flags & LL_LEASE_RESYNC) {
3385 rc = ll_lease_file_resync(och, inode, arg);
3387 ll_lease_close(och, inode, NULL);
3390 rc = ll_layout_refresh(inode, &fd->fd_layout_version);
3392 ll_lease_close(och, inode, NULL);
3398 mutex_lock(&lli->lli_och_mutex);
3399 if (fd->fd_lease_och == NULL) {
3400 fd->fd_lease_och = och;
3403 mutex_unlock(&lli->lli_och_mutex);
3405 /* impossible now that only excl is supported for now */
3406 ll_lease_close(och, inode, &lease_broken);
3412 static void ll_heat_get(struct inode *inode, struct lu_heat *heat)
3414 struct ll_inode_info *lli = ll_i2info(inode);
3415 struct ll_sb_info *sbi = ll_i2sbi(inode);
3416 __u64 now = ktime_get_real_seconds();
3419 spin_lock(&lli->lli_heat_lock);
3420 heat->lh_flags = lli->lli_heat_flags;
3421 for (i = 0; i < heat->lh_count; i++)
3422 heat->lh_heat[i] = obd_heat_get(&lli->lli_heat_instances[i],
3423 now, sbi->ll_heat_decay_weight,
3424 sbi->ll_heat_period_second);
3425 spin_unlock(&lli->lli_heat_lock);
3428 static int ll_heat_set(struct inode *inode, enum lu_heat_flag flags)
3430 struct ll_inode_info *lli = ll_i2info(inode);
3433 spin_lock(&lli->lli_heat_lock);
3434 if (flags & LU_HEAT_FLAG_CLEAR)
3435 obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
3437 if (flags & LU_HEAT_FLAG_OFF)
3438 lli->lli_heat_flags |= LU_HEAT_FLAG_OFF;
3440 lli->lli_heat_flags &= ~LU_HEAT_FLAG_OFF;
3442 spin_unlock(&lli->lli_heat_lock);
3448 ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
3450 struct inode *inode = file_inode(file);
3451 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
3455 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%x\n",
3456 PFID(ll_inode2fid(inode)), inode, cmd);
3457 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
3459 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
3460 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
3464 case LL_IOC_GETFLAGS:
3465 /* Get the current value of the file flags */
3466 return put_user(fd->fd_flags, (int __user *)arg);
3467 case LL_IOC_SETFLAGS:
3468 case LL_IOC_CLRFLAGS:
3469 /* Set or clear specific file flags */
3470 /* XXX This probably needs checks to ensure the flags are
3471 * not abused, and to handle any flag side effects.
3473 if (get_user(flags, (int __user *) arg))
3476 if (cmd == LL_IOC_SETFLAGS) {
3477 if ((flags & LL_FILE_IGNORE_LOCK) &&
3478 !(file->f_flags & O_DIRECT)) {
3479 CERROR("%s: unable to disable locking on "
3480 "non-O_DIRECT file\n", current->comm);
3484 fd->fd_flags |= flags;
3486 fd->fd_flags &= ~flags;
3489 case LL_IOC_LOV_SETSTRIPE:
3490 case LL_IOC_LOV_SETSTRIPE_NEW:
3491 RETURN(ll_lov_setstripe(inode, file, (void __user *)arg));
3492 case LL_IOC_LOV_SETEA:
3493 RETURN(ll_lov_setea(inode, file, (void __user *)arg));
3494 case LL_IOC_LOV_SWAP_LAYOUTS: {
3496 struct lustre_swap_layouts lsl;
3498 if (copy_from_user(&lsl, (char __user *)arg,
3499 sizeof(struct lustre_swap_layouts)))
3502 if ((file->f_flags & O_ACCMODE) == O_RDONLY)
3505 file2 = fget(lsl.sl_fd);
3509 /* O_WRONLY or O_RDWR */
3510 if ((file2->f_flags & O_ACCMODE) == O_RDONLY)
3511 GOTO(out, rc = -EPERM);
3513 if (lsl.sl_flags & SWAP_LAYOUTS_CLOSE) {
3514 struct inode *inode2;
3515 struct ll_inode_info *lli;
3516 struct obd_client_handle *och = NULL;
3518 lli = ll_i2info(inode);
3519 mutex_lock(&lli->lli_och_mutex);
3520 if (fd->fd_lease_och != NULL) {
3521 och = fd->fd_lease_och;
3522 fd->fd_lease_och = NULL;
3524 mutex_unlock(&lli->lli_och_mutex);
3526 GOTO(out, rc = -ENOLCK);
3527 inode2 = file_inode(file2);
3528 rc = ll_swap_layouts_close(och, inode, inode2);
3530 rc = ll_swap_layouts(file, file2, &lsl);
3536 case LL_IOC_LOV_GETSTRIPE:
3537 case LL_IOC_LOV_GETSTRIPE_NEW:
3538 RETURN(ll_file_getstripe(inode, (void __user *)arg, 0));
3539 case FS_IOC_GETFLAGS:
3540 case FS_IOC_SETFLAGS:
3541 RETURN(ll_iocontrol(inode, file, cmd, arg));
3542 case FSFILT_IOC_GETVERSION:
3543 case FS_IOC_GETVERSION:
3544 RETURN(put_user(inode->i_generation, (int __user *)arg));
3545 /* We need to special case any other ioctls we want to handle,
3546 * to send them to the MDS/OST as appropriate and to properly
3547 * network encode the arg field. */
3548 case FS_IOC_SETVERSION:
3551 case LL_IOC_GROUP_LOCK:
3552 RETURN(ll_get_grouplock(inode, file, arg));
3553 case LL_IOC_GROUP_UNLOCK:
3554 RETURN(ll_put_grouplock(inode, file, arg));
3555 case IOC_OBD_STATFS:
3556 RETURN(ll_obd_statfs(inode, (void __user *)arg));
3558 case LL_IOC_FLUSHCTX:
3559 RETURN(ll_flush_ctx(inode));
3560 case LL_IOC_PATH2FID: {
3561 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
3562 sizeof(struct lu_fid)))
3567 case LL_IOC_GETPARENT:
3568 RETURN(ll_getparent(file, (struct getparent __user *)arg));
3570 case OBD_IOC_FID2PATH:
3571 RETURN(ll_fid2path(inode, (void __user *)arg));
3572 case LL_IOC_DATA_VERSION: {
3573 struct ioc_data_version idv;
3576 if (copy_from_user(&idv, (char __user *)arg, sizeof(idv)))
3579 idv.idv_flags &= LL_DV_RD_FLUSH | LL_DV_WR_FLUSH;
3580 rc = ll_ioc_data_version(inode, &idv);
3583 copy_to_user((char __user *)arg, &idv, sizeof(idv)))
3589 case LL_IOC_GET_MDTIDX: {
3592 mdtidx = ll_get_mdt_idx(inode);
3596 if (put_user((int)mdtidx, (int __user *)arg))
3601 case OBD_IOC_GETDTNAME:
3602 case OBD_IOC_GETMDNAME:
3603 RETURN(ll_get_obd_name(inode, cmd, arg));
3604 case LL_IOC_HSM_STATE_GET: {
3605 struct md_op_data *op_data;
3606 struct hsm_user_state *hus;
3613 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
3614 LUSTRE_OPC_ANY, hus);
3615 if (IS_ERR(op_data)) {
3617 RETURN(PTR_ERR(op_data));
3620 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data),
3623 if (copy_to_user((void __user *)arg, hus, sizeof(*hus)))
3626 ll_finish_md_op_data(op_data);
3630 case LL_IOC_HSM_STATE_SET: {
3631 struct hsm_state_set *hss;
3638 if (copy_from_user(hss, (char __user *)arg, sizeof(*hss))) {
3643 rc = ll_hsm_state_set(inode, hss);
3648 case LL_IOC_HSM_ACTION: {
3649 struct md_op_data *op_data;
3650 struct hsm_current_action *hca;
3657 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
3658 LUSTRE_OPC_ANY, hca);
3659 if (IS_ERR(op_data)) {
3661 RETURN(PTR_ERR(op_data));
3664 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data),
3667 if (copy_to_user((char __user *)arg, hca, sizeof(*hca)))
3670 ll_finish_md_op_data(op_data);
3674 case LL_IOC_SET_LEASE_OLD: {
3675 struct ll_ioc_lease ioc = { .lil_mode = (__u32)arg };
3677 RETURN(ll_file_set_lease(file, &ioc, 0));
3679 case LL_IOC_SET_LEASE: {
3680 struct ll_ioc_lease ioc;
3682 if (copy_from_user(&ioc, (void __user *)arg, sizeof(ioc)))
3685 RETURN(ll_file_set_lease(file, &ioc, arg));
3687 case LL_IOC_GET_LEASE: {
3688 struct ll_inode_info *lli = ll_i2info(inode);
3689 struct ldlm_lock *lock = NULL;
3692 mutex_lock(&lli->lli_och_mutex);
3693 if (fd->fd_lease_och != NULL) {
3694 struct obd_client_handle *och = fd->fd_lease_och;
3696 lock = ldlm_handle2lock(&och->och_lease_handle);
3698 lock_res_and_lock(lock);
3699 if (!ldlm_is_cancel(lock))
3700 fmode = och->och_flags;
3702 unlock_res_and_lock(lock);
3703 LDLM_LOCK_PUT(lock);
3706 mutex_unlock(&lli->lli_och_mutex);
3708 RETURN(ll_lease_type_from_fmode(fmode));
3710 case LL_IOC_HSM_IMPORT: {
3711 struct hsm_user_import *hui;
3717 if (copy_from_user(hui, (void __user *)arg, sizeof(*hui))) {
3722 rc = ll_hsm_import(inode, file, hui);
3727 case LL_IOC_FUTIMES_3: {
3728 struct ll_futimes_3 lfu;
3730 if (copy_from_user(&lfu,
3731 (const struct ll_futimes_3 __user *)arg,
3735 RETURN(ll_file_futimes_3(file, &lfu));
3737 case LL_IOC_LADVISE: {
3738 struct llapi_ladvise_hdr *k_ladvise_hdr;
3739 struct llapi_ladvise_hdr __user *u_ladvise_hdr;
3742 int alloc_size = sizeof(*k_ladvise_hdr);
3745 u_ladvise_hdr = (void __user *)arg;
3746 OBD_ALLOC_PTR(k_ladvise_hdr);
3747 if (k_ladvise_hdr == NULL)
3750 if (copy_from_user(k_ladvise_hdr, u_ladvise_hdr, alloc_size))
3751 GOTO(out_ladvise, rc = -EFAULT);
3753 if (k_ladvise_hdr->lah_magic != LADVISE_MAGIC ||
3754 k_ladvise_hdr->lah_count < 1)
3755 GOTO(out_ladvise, rc = -EINVAL);
3757 num_advise = k_ladvise_hdr->lah_count;
3758 if (num_advise >= LAH_COUNT_MAX)
3759 GOTO(out_ladvise, rc = -EFBIG);
3761 OBD_FREE_PTR(k_ladvise_hdr);
3762 alloc_size = offsetof(typeof(*k_ladvise_hdr),
3763 lah_advise[num_advise]);
3764 OBD_ALLOC(k_ladvise_hdr, alloc_size);
3765 if (k_ladvise_hdr == NULL)
3769 * TODO: submit multiple advices to one server in a single RPC
3771 if (copy_from_user(k_ladvise_hdr, u_ladvise_hdr, alloc_size))
3772 GOTO(out_ladvise, rc = -EFAULT);
3774 for (i = 0; i < num_advise; i++) {
3775 struct llapi_lu_ladvise *k_ladvise =
3776 &k_ladvise_hdr->lah_advise[i];
3777 struct llapi_lu_ladvise __user *u_ladvise =
3778 &u_ladvise_hdr->lah_advise[i];
3780 rc = ll_ladvise_sanity(inode, k_ladvise);
3782 GOTO(out_ladvise, rc);
3784 switch (k_ladvise->lla_advice) {
3785 case LU_LADVISE_LOCKNOEXPAND:
3786 rc = ll_lock_noexpand(file,
3787 k_ladvise->lla_peradvice_flags);
3788 GOTO(out_ladvise, rc);
3789 case LU_LADVISE_LOCKAHEAD:
3791 rc = ll_file_lock_ahead(file, k_ladvise);
3794 GOTO(out_ladvise, rc);
3797 &u_ladvise->lla_lockahead_result))
3798 GOTO(out_ladvise, rc = -EFAULT);
3801 rc = ll_ladvise(inode, file,
3802 k_ladvise_hdr->lah_flags,
3805 GOTO(out_ladvise, rc);
3812 OBD_FREE(k_ladvise_hdr, alloc_size);
3815 case LL_IOC_FLR_SET_MIRROR: {
3816 /* mirror I/O must be direct to avoid polluting page cache
3818 if (!(file->f_flags & O_DIRECT))
3821 fd->fd_designated_mirror = (__u32)arg;
3824 case LL_IOC_FSGETXATTR:
3825 RETURN(ll_ioctl_fsgetxattr(inode, cmd, arg));
3826 case LL_IOC_FSSETXATTR:
3827 RETURN(ll_ioctl_fssetxattr(inode, cmd, arg));
3829 RETURN(put_user(PAGE_SIZE, (int __user *)arg));
3830 case LL_IOC_HEAT_GET: {
3831 struct lu_heat uheat;
3832 struct lu_heat *heat;
3835 if (copy_from_user(&uheat, (void __user *)arg, sizeof(uheat)))
3838 if (uheat.lh_count > OBD_HEAT_COUNT)
3839 uheat.lh_count = OBD_HEAT_COUNT;
3841 size = offsetof(typeof(uheat), lh_heat[uheat.lh_count]);
3842 OBD_ALLOC(heat, size);
3846 heat->lh_count = uheat.lh_count;
3847 ll_heat_get(inode, heat);
3848 rc = copy_to_user((char __user *)arg, heat, size);
3849 OBD_FREE(heat, size);
3850 RETURN(rc ? -EFAULT : 0);
3852 case LL_IOC_HEAT_SET: {
3855 if (copy_from_user(&flags, (void __user *)arg, sizeof(flags)))
3858 rc = ll_heat_set(inode, flags);
3861 case LL_IOC_PCC_DETACH: {
3862 struct lu_pcc_detach *detach;
3864 OBD_ALLOC_PTR(detach);
3868 if (copy_from_user(detach,
3869 (const struct lu_pcc_detach __user *)arg,
3871 GOTO(out_detach_free, rc = -EFAULT);
3873 if (!S_ISREG(inode->i_mode))
3874 GOTO(out_detach_free, rc = -EINVAL);
3876 if (!inode_owner_or_capable(inode))
3877 GOTO(out_detach_free, rc = -EPERM);
3879 rc = pcc_ioctl_detach(inode, detach->pccd_opt);
3881 OBD_FREE_PTR(detach);
3884 case LL_IOC_PCC_STATE: {
3885 struct lu_pcc_state __user *ustate =
3886 (struct lu_pcc_state __user *)arg;
3887 struct lu_pcc_state *state;
3889 OBD_ALLOC_PTR(state);
3893 if (copy_from_user(state, ustate, sizeof(*state)))
3894 GOTO(out_state, rc = -EFAULT);
3896 rc = pcc_ioctl_state(file, inode, state);
3898 GOTO(out_state, rc);
3900 if (copy_to_user(ustate, state, sizeof(*state)))
3901 GOTO(out_state, rc = -EFAULT);
3904 OBD_FREE_PTR(state);
3908 RETURN(obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
3909 (void __user *)arg));
3913 #ifndef HAVE_FILE_LLSEEK_SIZE
3914 static inline loff_t
3915 llseek_execute(struct file *file, loff_t offset, loff_t maxsize)
3917 if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
3919 if (offset > maxsize)
3922 if (offset != file->f_pos) {
3923 file->f_pos = offset;
3924 file->f_version = 0;
3930 generic_file_llseek_size(struct file *file, loff_t offset, int origin,
3931 loff_t maxsize, loff_t eof)
3933 struct inode *inode = file_inode(file);
3941 * Here we special-case the lseek(fd, 0, SEEK_CUR)
3942 * position-querying operation. Avoid rewriting the "same"
3943 * f_pos value back to the file because a concurrent read(),
3944 * write() or lseek() might have altered it
3949 * f_lock protects against read/modify/write race with other
3950 * SEEK_CURs. Note that parallel writes and reads behave
3954 offset = llseek_execute(file, file->f_pos + offset, maxsize);
3955 inode_unlock(inode);
3959 * In the generic case the entire file is data, so as long as
3960 * offset isn't at the end of the file then the offset is data.
3967 * There is a virtual hole at the end of the file, so as long as
3968 * offset isn't i_size or larger, return i_size.
3976 return llseek_execute(file, offset, maxsize);
3980 static loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
3982 struct inode *inode = file_inode(file);
3983 loff_t retval, eof = 0;
3986 retval = offset + ((origin == SEEK_END) ? i_size_read(inode) :
3987 (origin == SEEK_CUR) ? file->f_pos : 0);
3988 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), to=%llu=%#llx(%d)\n",
3989 PFID(ll_inode2fid(inode)), inode, retval, retval,
3991 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK, 1);
3993 if (origin == SEEK_END || origin == SEEK_HOLE || origin == SEEK_DATA) {
3994 retval = ll_glimpse_size(inode);
3997 eof = i_size_read(inode);
4000 retval = ll_generic_file_llseek_size(file, offset, origin,
4001 ll_file_maxbytes(inode), eof);
4005 static int ll_flush(struct file *file, fl_owner_t id)
4007 struct inode *inode = file_inode(file);
4008 struct ll_inode_info *lli = ll_i2info(inode);
4009 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
4012 LASSERT(!S_ISDIR(inode->i_mode));
4014 /* catch async errors that were recorded back when async writeback
4015 * failed for pages in this mapping. */
4016 rc = lli->lli_async_rc;
4017 lli->lli_async_rc = 0;
4018 if (lli->lli_clob != NULL) {
4019 err = lov_read_and_clear_async_rc(lli->lli_clob);
4024 /* The application has been told write failure already.
4025 * Do not report failure again. */
4026 if (fd->fd_write_failed)
4028 return rc ? -EIO : 0;
4032 * Called to make sure a portion of file has been written out.
4033 * if @mode is not CL_FSYNC_LOCAL, it will send OST_SYNC RPCs to OST.
4035 * Return how many pages have been written.
4037 int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end,
4038 enum cl_fsync_mode mode, int ignore_layout)
4042 struct cl_fsync_io *fio;
4047 if (mode != CL_FSYNC_NONE && mode != CL_FSYNC_LOCAL &&
4048 mode != CL_FSYNC_DISCARD && mode != CL_FSYNC_ALL)
4051 env = cl_env_get(&refcheck);
4053 RETURN(PTR_ERR(env));
4055 io = vvp_env_thread_io(env);
4056 io->ci_obj = ll_i2info(inode)->lli_clob;
4057 io->ci_ignore_layout = ignore_layout;
4059 /* initialize parameters for sync */
4060 fio = &io->u.ci_fsync;
4061 fio->fi_start = start;
4063 fio->fi_fid = ll_inode2fid(inode);
4064 fio->fi_mode = mode;
4065 fio->fi_nr_written = 0;
4067 if (cl_io_init(env, io, CIT_FSYNC, io->ci_obj) == 0)
4068 result = cl_io_loop(env, io);
4070 result = io->ci_result;
4072 result = fio->fi_nr_written;
4073 cl_io_fini(env, io);
4074 cl_env_put(env, &refcheck);
4080 * When dentry is provided (the 'else' case), file_dentry() may be
4081 * null and dentry must be used directly rather than pulled from
4082 * file_dentry() as is done otherwise.
4085 int ll_fsync(struct file *file, loff_t start, loff_t end, int datasync)
4087 struct dentry *dentry = file_dentry(file);
4088 struct inode *inode = dentry->d_inode;
4089 struct ll_inode_info *lli = ll_i2info(inode);
4090 struct ptlrpc_request *req;
4095 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), start %lld, end %lld,"
4097 PFID(ll_inode2fid(inode)), inode, start, end, datasync);
4099 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1);
4101 /* fsync's caller has already called _fdata{sync,write}, we want
4102 * that IO to finish before calling the osc and mdc sync methods */
4103 rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
4106 /* catch async errors that were recorded back when async writeback
4107 * failed for pages in this mapping. */
4108 if (!S_ISDIR(inode->i_mode)) {
4109 err = lli->lli_async_rc;
4110 lli->lli_async_rc = 0;
4113 if (lli->lli_clob != NULL) {
4114 err = lov_read_and_clear_async_rc(lli->lli_clob);
4120 err = md_fsync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), &req);
4124 ptlrpc_req_finished(req);
4126 if (S_ISREG(inode->i_mode)) {
4127 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
4130 /* Sync metadata on MDT first, and then sync the cached data
4133 err = pcc_fsync(file, start, end, datasync, &cached);
4135 err = cl_sync_file_range(inode, start, end,
4137 if (rc == 0 && err < 0)
4140 fd->fd_write_failed = true;
4142 fd->fd_write_failed = false;
4145 inode_unlock(inode);
4150 ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
4152 struct inode *inode = file_inode(file);
4153 struct ll_sb_info *sbi = ll_i2sbi(inode);
4154 struct ldlm_enqueue_info einfo = {
4155 .ei_type = LDLM_FLOCK,
4156 .ei_cb_cp = ldlm_flock_completion_ast,
4157 .ei_cbdata = file_lock,
4159 struct md_op_data *op_data;
4160 struct lustre_handle lockh = { 0 };
4161 union ldlm_policy_data flock = { { 0 } };
4162 int fl_type = file_lock->fl_type;
4168 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID" file_lock=%p\n",
4169 PFID(ll_inode2fid(inode)), file_lock);
4171 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK, 1);
4173 if (file_lock->fl_flags & FL_FLOCK) {
4174 LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK));
4175 /* flocks are whole-file locks */
4176 flock.l_flock.end = OFFSET_MAX;
4177 /* For flocks owner is determined by the local file desctiptor*/
4178 flock.l_flock.owner = (unsigned long)file_lock->fl_file;
4179 } else if (file_lock->fl_flags & FL_POSIX) {
4180 flock.l_flock.owner = (unsigned long)file_lock->fl_owner;
4181 flock.l_flock.start = file_lock->fl_start;
4182 flock.l_flock.end = file_lock->fl_end;
4186 flock.l_flock.pid = file_lock->fl_pid;
4188 /* Somewhat ugly workaround for svc lockd.
4189 * lockd installs custom fl_lmops->lm_compare_owner that checks
4190 * for the fl_owner to be the same (which it always is on local node
4191 * I guess between lockd processes) and then compares pid.
4192 * As such we assign pid to the owner field to make it all work,
4193 * conflict with normal locks is unlikely since pid space and
4194 * pointer space for current->files are not intersecting */
4195 if (file_lock->fl_lmops && file_lock->fl_lmops->lm_compare_owner)
4196 flock.l_flock.owner = (unsigned long)file_lock->fl_pid;
4200 einfo.ei_mode = LCK_PR;
4203 /* An unlock request may or may not have any relation to
4204 * existing locks so we may not be able to pass a lock handle
4205 * via a normal ldlm_lock_cancel() request. The request may even
4206 * unlock a byte range in the middle of an existing lock. In
4207 * order to process an unlock request we need all of the same
4208 * information that is given with a normal read or write record
4209 * lock request. To avoid creating another ldlm unlock (cancel)
4210 * message we'll treat a LCK_NL flock request as an unlock. */
4211 einfo.ei_mode = LCK_NL;
4214 einfo.ei_mode = LCK_PW;
4217 CDEBUG(D_INFO, "Unknown fcntl lock type: %d\n", fl_type);
4232 flags = LDLM_FL_BLOCK_NOWAIT;
4238 flags = LDLM_FL_TEST_LOCK;
4241 CERROR("unknown fcntl lock command: %d\n", cmd);
4245 /* Save the old mode so that if the mode in the lock changes we
4246 * can decrement the appropriate reader or writer refcount. */
4247 file_lock->fl_type = einfo.ei_mode;
4249 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
4250 LUSTRE_OPC_ANY, NULL);
4251 if (IS_ERR(op_data))
4252 RETURN(PTR_ERR(op_data));
4254 CDEBUG(D_DLMTRACE, "inode="DFID", pid=%u, flags=%#llx, mode=%u, "
4255 "start=%llu, end=%llu\n", PFID(ll_inode2fid(inode)),
4256 flock.l_flock.pid, flags, einfo.ei_mode,
4257 flock.l_flock.start, flock.l_flock.end);
4259 rc = md_enqueue(sbi->ll_md_exp, &einfo, &flock, op_data, &lockh,
4262 /* Restore the file lock type if not TEST lock. */
4263 if (!(flags & LDLM_FL_TEST_LOCK))
4264 file_lock->fl_type = fl_type;
4266 #ifdef HAVE_LOCKS_LOCK_FILE_WAIT
4267 if ((rc == 0 || file_lock->fl_type == F_UNLCK) &&
4268 !(flags & LDLM_FL_TEST_LOCK))
4269 rc2 = locks_lock_file_wait(file, file_lock);
4271 if ((file_lock->fl_flags & FL_FLOCK) &&
4272 (rc == 0 || file_lock->fl_type == F_UNLCK))
4273 rc2 = flock_lock_file_wait(file, file_lock);
4274 if ((file_lock->fl_flags & FL_POSIX) &&
4275 (rc == 0 || file_lock->fl_type == F_UNLCK) &&
4276 !(flags & LDLM_FL_TEST_LOCK))
4277 rc2 = posix_lock_file_wait(file, file_lock);
4278 #endif /* HAVE_LOCKS_LOCK_FILE_WAIT */
4280 if (rc2 && file_lock->fl_type != F_UNLCK) {
4281 einfo.ei_mode = LCK_NL;
4282 md_enqueue(sbi->ll_md_exp, &einfo, &flock, op_data,
4287 ll_finish_md_op_data(op_data);
4292 int ll_get_fid_by_name(struct inode *parent, const char *name,
4293 int namelen, struct lu_fid *fid,
4294 struct inode **inode)
4296 struct md_op_data *op_data = NULL;
4297 struct mdt_body *body;
4298 struct ptlrpc_request *req;
4302 op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen, 0,
4303 LUSTRE_OPC_ANY, NULL);
4304 if (IS_ERR(op_data))
4305 RETURN(PTR_ERR(op_data));
4307 op_data->op_valid = OBD_MD_FLID | OBD_MD_FLTYPE;
4308 rc = md_getattr_name(ll_i2sbi(parent)->ll_md_exp, op_data, &req);
4309 ll_finish_md_op_data(op_data);
4313 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
4315 GOTO(out_req, rc = -EFAULT);
4317 *fid = body->mbo_fid1;
4320 rc = ll_prep_inode(inode, req, parent->i_sb, NULL);
4322 ptlrpc_req_finished(req);
4326 int ll_migrate(struct inode *parent, struct file *file, struct lmv_user_md *lum,
4329 struct dentry *dchild = NULL;
4330 struct inode *child_inode = NULL;
4331 struct md_op_data *op_data;
4332 struct ptlrpc_request *request = NULL;
4333 struct obd_client_handle *och = NULL;
4335 struct mdt_body *body;
4336 __u64 data_version = 0;
4337 size_t namelen = strlen(name);
4338 int lumlen = lmv_user_md_size(lum->lum_stripe_count, lum->lum_magic);
4342 CDEBUG(D_VFSTRACE, "migrate "DFID"/%s to MDT%04x stripe count %d\n",
4343 PFID(ll_inode2fid(parent)), name,
4344 lum->lum_stripe_offset, lum->lum_stripe_count);
4346 if (lum->lum_magic != cpu_to_le32(LMV_USER_MAGIC) &&
4347 lum->lum_magic != cpu_to_le32(LMV_USER_MAGIC_SPECIFIC))
4348 lustre_swab_lmv_user_md(lum);
4350 /* Get child FID first */
4351 qstr.hash = ll_full_name_hash(file_dentry(file), name, namelen);
4354 dchild = d_lookup(file_dentry(file), &qstr);
4356 if (dchild->d_inode)
4357 child_inode = igrab(dchild->d_inode);
4362 rc = ll_get_fid_by_name(parent, name, namelen, NULL,
4371 if (!(exp_connect_flags2(ll_i2sbi(parent)->ll_md_exp) &
4372 OBD_CONNECT2_DIR_MIGRATE)) {
4373 if (le32_to_cpu(lum->lum_stripe_count) > 1 ||
4374 ll_dir_striped(child_inode)) {
4375 CERROR("%s: MDT doesn't support stripe directory "
4376 "migration!\n", ll_i2sbi(parent)->ll_fsname);
4377 GOTO(out_iput, rc = -EOPNOTSUPP);
4382 * lfs migrate command needs to be blocked on the client
4383 * by checking the migrate FID against the FID of the
4386 if (child_inode == parent->i_sb->s_root->d_inode)
4387 GOTO(out_iput, rc = -EINVAL);
4389 op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen,
4390 child_inode->i_mode, LUSTRE_OPC_ANY, NULL);
4391 if (IS_ERR(op_data))
4392 GOTO(out_iput, rc = PTR_ERR(op_data));
4394 inode_lock(child_inode);
4395 op_data->op_fid3 = *ll_inode2fid(child_inode);
4396 if (!fid_is_sane(&op_data->op_fid3)) {
4397 CERROR("%s: migrate %s, but FID "DFID" is insane\n",
4398 ll_i2sbi(parent)->ll_fsname, name,
4399 PFID(&op_data->op_fid3));
4400 GOTO(out_unlock, rc = -EINVAL);
4403 op_data->op_cli_flags |= CLI_MIGRATE | CLI_SET_MEA;
4404 op_data->op_data = lum;
4405 op_data->op_data_size = lumlen;
4408 if (S_ISREG(child_inode->i_mode)) {
4409 och = ll_lease_open(child_inode, NULL, FMODE_WRITE, 0);
4413 GOTO(out_unlock, rc);
4416 rc = ll_data_version(child_inode, &data_version,
4419 GOTO(out_close, rc);
4421 op_data->op_open_handle = och->och_open_handle;
4422 op_data->op_data_version = data_version;
4423 op_data->op_lease_handle = och->och_lease_handle;
4424 op_data->op_bias |= MDS_CLOSE_MIGRATE;
4426 spin_lock(&och->och_mod->mod_open_req->rq_lock);
4427 och->och_mod->mod_open_req->rq_replay = 0;
4428 spin_unlock(&och->och_mod->mod_open_req->rq_lock);
4431 rc = md_rename(ll_i2sbi(parent)->ll_md_exp, op_data, name, namelen,
4432 name, namelen, &request);
4434 LASSERT(request != NULL);
4435 ll_update_times(request, parent);
4438 if (rc == 0 || rc == -EAGAIN) {
4439 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
4440 LASSERT(body != NULL);
4442 /* If the server does release layout lock, then we cleanup
4443 * the client och here, otherwise release it in out_close: */
4444 if (och && body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED) {
4445 obd_mod_put(och->och_mod);
4446 md_clear_open_replay_data(ll_i2sbi(parent)->ll_md_exp,
4448 och->och_open_handle.cookie = DEAD_HANDLE_MAGIC;
4454 if (request != NULL) {
4455 ptlrpc_req_finished(request);
4459 /* Try again if the lease has cancelled. */
4460 if (rc == -EAGAIN && S_ISREG(child_inode->i_mode))
4465 ll_lease_close(och, child_inode, NULL);
4467 clear_nlink(child_inode);
4469 inode_unlock(child_inode);
4470 ll_finish_md_op_data(op_data);
4477 ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock)
4479 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
4483 * In order to avoid flood of warning messages, only print one message
4484 * for one file. And the entire message rate on the client is limited
4485 * by CDEBUG_LIMIT too.
4487 if (!(fd->fd_flags & LL_FILE_FLOCK_WARNING)) {
4488 fd->fd_flags |= LL_FILE_FLOCK_WARNING;
4489 CDEBUG_LIMIT(D_TTY | D_CONSOLE,
4490 "flock disabled, mount with '-o [local]flock' to enable\r\n");
4496 * test if some locks matching bits and l_req_mode are acquired
4497 * - bits can be in different locks
4498 * - if found clear the common lock bits in *bits
4499 * - the bits not found, are kept in *bits
4501 * \param bits [IN] searched lock bits [IN]
4502 * \param l_req_mode [IN] searched lock mode
4503 * \retval boolean, true iff all bits are found
4505 int ll_have_md_lock(struct inode *inode, __u64 *bits, enum ldlm_mode l_req_mode)
4507 struct lustre_handle lockh;
4508 union ldlm_policy_data policy;
4509 enum ldlm_mode mode = (l_req_mode == LCK_MINMODE) ?
4510 (LCK_CR | LCK_CW | LCK_PR | LCK_PW) : l_req_mode;
4519 fid = &ll_i2info(inode)->lli_fid;
4520 CDEBUG(D_INFO, "trying to match res "DFID" mode %s\n", PFID(fid),
4521 ldlm_lockname[mode]);
4523 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK;
4524 for (i = 0; i < MDS_INODELOCK_NUMBITS && *bits != 0; i++) {
4525 policy.l_inodebits.bits = *bits & (1 << i);
4526 if (policy.l_inodebits.bits == 0)
4529 if (md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS,
4530 &policy, mode, &lockh)) {
4531 struct ldlm_lock *lock;
4533 lock = ldlm_handle2lock(&lockh);
4536 ~(lock->l_policy_data.l_inodebits.bits);
4537 LDLM_LOCK_PUT(lock);
4539 *bits &= ~policy.l_inodebits.bits;
4546 enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits,
4547 struct lustre_handle *lockh, __u64 flags,
4548 enum ldlm_mode mode)
4550 union ldlm_policy_data policy = { .l_inodebits = { bits } };
4555 fid = &ll_i2info(inode)->lli_fid;
4556 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
4558 rc = md_lock_match(ll_i2mdexp(inode), LDLM_FL_BLOCK_GRANTED|flags,
4559 fid, LDLM_IBITS, &policy, mode, lockh);
4564 static int ll_inode_revalidate_fini(struct inode *inode, int rc)
4566 /* Already unlinked. Just update nlink and return success */
4567 if (rc == -ENOENT) {
4569 /* If it is striped directory, and there is bad stripe
4570 * Let's revalidate the dentry again, instead of returning
4572 if (ll_dir_striped(inode))
4575 /* This path cannot be hit for regular files unless in
4576 * case of obscure races, so no need to to validate
4578 if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
4580 } else if (rc != 0) {
4581 CDEBUG_LIMIT((rc == -EACCES || rc == -EIDRM) ? D_INFO : D_ERROR,
4582 "%s: revalidate FID "DFID" error: rc = %d\n",
4583 ll_i2sbi(inode)->ll_fsname,
4584 PFID(ll_inode2fid(inode)), rc);
4590 static int ll_inode_revalidate(struct dentry *dentry, enum ldlm_intent_flags op)
4592 struct inode *inode = dentry->d_inode;
4593 struct obd_export *exp = ll_i2mdexp(inode);
4594 struct lookup_intent oit = {
4597 struct ptlrpc_request *req = NULL;
4598 struct md_op_data *op_data;
4602 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p),name=%s\n",
4603 PFID(ll_inode2fid(inode)), inode, dentry->d_name.name);
4605 /* Call getattr by fid, so do not provide name at all. */
4606 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
4607 LUSTRE_OPC_ANY, NULL);
4608 if (IS_ERR(op_data))
4609 RETURN(PTR_ERR(op_data));
4611 rc = md_intent_lock(exp, op_data, &oit, &req, &ll_md_blocking_ast, 0);
4612 ll_finish_md_op_data(op_data);
4614 rc = ll_inode_revalidate_fini(inode, rc);
4618 rc = ll_revalidate_it_finish(req, &oit, dentry);
4620 ll_intent_release(&oit);
4624 /* Unlinked? Unhash dentry, so it is not picked up later by
4625 * do_lookup() -> ll_revalidate_it(). We cannot use d_drop
4626 * here to preserve get_cwd functionality on 2.6.
4628 if (!dentry->d_inode->i_nlink) {
4629 ll_lock_dcache(inode);
4630 d_lustre_invalidate(dentry, 0);
4631 ll_unlock_dcache(inode);
4634 ll_lookup_finish_locks(&oit, dentry);
4636 ptlrpc_req_finished(req);
4641 static int ll_merge_md_attr(struct inode *inode)
4643 struct ll_inode_info *lli = ll_i2info(inode);
4644 struct cl_attr attr = { 0 };
4647 LASSERT(lli->lli_lsm_md != NULL);
4649 if (!lmv_dir_striped(lli->lli_lsm_md))
4652 down_read(&lli->lli_lsm_sem);
4653 rc = md_merge_attr(ll_i2mdexp(inode), ll_i2info(inode)->lli_lsm_md,
4654 &attr, ll_md_blocking_ast);
4655 up_read(&lli->lli_lsm_sem);
4659 set_nlink(inode, attr.cat_nlink);
4660 inode->i_blocks = attr.cat_blocks;
4661 i_size_write(inode, attr.cat_size);
4663 ll_i2info(inode)->lli_atime = attr.cat_atime;
4664 ll_i2info(inode)->lli_mtime = attr.cat_mtime;
4665 ll_i2info(inode)->lli_ctime = attr.cat_ctime;
4670 int ll_getattr_dentry(struct dentry *de, struct kstat *stat)
4672 struct inode *inode = de->d_inode;
4673 struct ll_sb_info *sbi = ll_i2sbi(inode);
4674 struct ll_inode_info *lli = ll_i2info(inode);
4677 ll_stats_ops_tally(sbi, LPROC_LL_GETATTR, 1);
4679 rc = ll_inode_revalidate(de, IT_GETATTR);
4683 if (S_ISREG(inode->i_mode)) {
4686 rc = pcc_inode_getattr(inode, &cached);
4687 if (cached && rc < 0)
4690 /* In case of restore, the MDT has the right size and has
4691 * already send it back without granting the layout lock,
4692 * inode is up-to-date so glimpse is useless.
4693 * Also to glimpse we need the layout, in case of a running
4694 * restore the MDT holds the layout lock so the glimpse will
4695 * block up to the end of restore (getattr will block)
4697 if (!cached && !ll_file_test_flag(lli, LLIF_FILE_RESTORING)) {
4698 rc = ll_glimpse_size(inode);
4703 /* If object isn't regular a file then don't validate size. */
4704 if (ll_dir_striped(inode)) {
4705 rc = ll_merge_md_attr(inode);
4710 inode->i_atime.tv_sec = lli->lli_atime;
4711 inode->i_mtime.tv_sec = lli->lli_mtime;
4712 inode->i_ctime.tv_sec = lli->lli_ctime;
4715 OBD_FAIL_TIMEOUT(OBD_FAIL_GETATTR_DELAY, 30);
4717 if (ll_need_32bit_api(sbi)) {
4718 stat->ino = cl_fid_build_ino(&lli->lli_fid, 1);
4719 stat->dev = ll_compat_encode_dev(inode->i_sb->s_dev);
4720 stat->rdev = ll_compat_encode_dev(inode->i_rdev);
4722 stat->ino = inode->i_ino;
4723 stat->dev = inode->i_sb->s_dev;
4724 stat->rdev = inode->i_rdev;
4727 stat->mode = inode->i_mode;
4728 stat->uid = inode->i_uid;
4729 stat->gid = inode->i_gid;
4730 stat->atime = inode->i_atime;
4731 stat->mtime = inode->i_mtime;
4732 stat->ctime = inode->i_ctime;
4733 stat->blksize = sbi->ll_stat_blksize ?: 1 << inode->i_blkbits;
4735 stat->nlink = inode->i_nlink;
4736 stat->size = i_size_read(inode);
4737 stat->blocks = inode->i_blocks;
4742 #ifdef HAVE_INODEOPS_ENHANCED_GETATTR
4743 int ll_getattr(const struct path *path, struct kstat *stat,
4744 u32 request_mask, unsigned int flags)
4746 struct dentry *de = path->dentry;
4748 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
4751 return ll_getattr_dentry(de, stat);
4754 static int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
4755 __u64 start, __u64 len)
4759 struct fiemap *fiemap;
4760 unsigned int extent_count = fieinfo->fi_extents_max;
4762 num_bytes = sizeof(*fiemap) + (extent_count *
4763 sizeof(struct fiemap_extent));
4764 OBD_ALLOC_LARGE(fiemap, num_bytes);
4769 fiemap->fm_flags = fieinfo->fi_flags;
4770 fiemap->fm_extent_count = fieinfo->fi_extents_max;
4771 fiemap->fm_start = start;
4772 fiemap->fm_length = len;
4773 if (extent_count > 0 &&
4774 copy_from_user(&fiemap->fm_extents[0], fieinfo->fi_extents_start,
4775 sizeof(struct fiemap_extent)) != 0)
4776 GOTO(out, rc = -EFAULT);
4778 rc = ll_do_fiemap(inode, fiemap, num_bytes);
4780 fieinfo->fi_flags = fiemap->fm_flags;
4781 fieinfo->fi_extents_mapped = fiemap->fm_mapped_extents;
4782 if (extent_count > 0 &&
4783 copy_to_user(fieinfo->fi_extents_start, &fiemap->fm_extents[0],
4784 fiemap->fm_mapped_extents *
4785 sizeof(struct fiemap_extent)) != 0)
4786 GOTO(out, rc = -EFAULT);
4788 OBD_FREE_LARGE(fiemap, num_bytes);
4792 struct posix_acl *ll_get_acl(struct inode *inode, int type)
4794 struct ll_inode_info *lli = ll_i2info(inode);
4795 struct posix_acl *acl = NULL;
4798 spin_lock(&lli->lli_lock);
4799 /* VFS' acl_permission_check->check_acl will release the refcount */
4800 acl = posix_acl_dup(lli->lli_posix_acl);
4801 spin_unlock(&lli->lli_lock);
4806 #ifdef HAVE_IOP_SET_ACL
4807 #ifdef CONFIG_FS_POSIX_ACL
4808 int ll_set_acl(struct inode *inode, struct posix_acl *acl, int type)
4810 struct ll_sb_info *sbi = ll_i2sbi(inode);
4811 struct ptlrpc_request *req = NULL;
4812 const char *name = NULL;
4814 size_t value_size = 0;
4819 case ACL_TYPE_ACCESS:
4820 name = XATTR_NAME_POSIX_ACL_ACCESS;
4822 rc = posix_acl_update_mode(inode, &inode->i_mode, &acl);
4825 case ACL_TYPE_DEFAULT:
4826 name = XATTR_NAME_POSIX_ACL_DEFAULT;
4827 if (!S_ISDIR(inode->i_mode))
4828 rc = acl ? -EACCES : 0;
4839 value_size = posix_acl_xattr_size(acl->a_count);
4840 value = kmalloc(value_size, GFP_NOFS);
4842 GOTO(out, rc = -ENOMEM);
4844 rc = posix_acl_to_xattr(&init_user_ns, acl, value, value_size);
4846 GOTO(out_value, rc);
4849 rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode),
4850 value ? OBD_MD_FLXATTR : OBD_MD_FLXATTRRM,
4851 name, value, value_size, 0, 0, &req);
4853 ptlrpc_req_finished(req);
4858 forget_cached_acl(inode, type);
4860 set_cached_acl(inode, type, acl);
4863 #endif /* CONFIG_FS_POSIX_ACL */
4864 #endif /* HAVE_IOP_SET_ACL */
4866 #ifndef HAVE_GENERIC_PERMISSION_2ARGS
4868 # ifdef HAVE_GENERIC_PERMISSION_4ARGS
4869 ll_check_acl(struct inode *inode, int mask, unsigned int flags)
4871 ll_check_acl(struct inode *inode, int mask)
4874 # ifdef CONFIG_FS_POSIX_ACL
4875 struct posix_acl *acl;
4879 # ifdef HAVE_GENERIC_PERMISSION_4ARGS
4880 if (flags & IPERM_FLAG_RCU)
4883 acl = ll_get_acl(inode, ACL_TYPE_ACCESS);
4888 rc = posix_acl_permission(inode, acl, mask);
4889 posix_acl_release(acl);
4892 # else /* !CONFIG_FS_POSIX_ACL */
4894 # endif /* CONFIG_FS_POSIX_ACL */
4896 #endif /* HAVE_GENERIC_PERMISSION_2ARGS */
4898 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
4899 int ll_inode_permission(struct inode *inode, int mask, unsigned int flags)
4901 # ifdef HAVE_INODE_PERMISION_2ARGS
4902 int ll_inode_permission(struct inode *inode, int mask)
4904 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
4909 struct ll_sb_info *sbi;
4910 struct root_squash_info *squash;
4911 struct cred *cred = NULL;
4912 const struct cred *old_cred = NULL;
4914 bool squash_id = false;
4917 #ifdef MAY_NOT_BLOCK
4918 if (mask & MAY_NOT_BLOCK)
4920 #elif defined(HAVE_GENERIC_PERMISSION_4ARGS)
4921 if (flags & IPERM_FLAG_RCU)
4925 /* as root inode are NOT getting validated in lookup operation,
4926 * need to do it before permission check. */
4928 if (inode == inode->i_sb->s_root->d_inode) {
4929 rc = ll_inode_revalidate(inode->i_sb->s_root, IT_LOOKUP);
4934 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), inode mode %x mask %o\n",
4935 PFID(ll_inode2fid(inode)), inode, inode->i_mode, mask);
4937 /* squash fsuid/fsgid if needed */
4938 sbi = ll_i2sbi(inode);
4939 squash = &sbi->ll_squash;
4940 if (unlikely(squash->rsi_uid != 0 &&
4941 uid_eq(current_fsuid(), GLOBAL_ROOT_UID) &&
4942 !(sbi->ll_flags & LL_SBI_NOROOTSQUASH))) {
4946 CDEBUG(D_OTHER, "squash creds (%d:%d)=>(%d:%d)\n",
4947 __kuid_val(current_fsuid()), __kgid_val(current_fsgid()),
4948 squash->rsi_uid, squash->rsi_gid);
4950 /* update current process's credentials
4951 * and FS capability */
4952 cred = prepare_creds();
4956 cred->fsuid = make_kuid(&init_user_ns, squash->rsi_uid);
4957 cred->fsgid = make_kgid(&init_user_ns, squash->rsi_gid);
4958 for (cap = 0; cap < sizeof(cfs_cap_t) * 8; cap++) {
4959 if ((1 << cap) & CFS_CAP_FS_MASK)
4960 cap_lower(cred->cap_effective, cap);
4962 old_cred = override_creds(cred);
4965 ll_stats_ops_tally(sbi, LPROC_LL_INODE_PERM, 1);
4966 rc = ll_generic_permission(inode, mask, flags, ll_check_acl);
4967 /* restore current process's credentials and FS capability */
4969 revert_creds(old_cred);
4976 /* -o localflock - only provides locally consistent flock locks */
4977 struct file_operations ll_file_operations = {
4978 #ifdef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
4979 # ifdef HAVE_SYNC_READ_WRITE
4980 .read = new_sync_read,
4981 .write = new_sync_write,
4983 .read_iter = ll_file_read_iter,
4984 .write_iter = ll_file_write_iter,
4985 #else /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
4986 .read = ll_file_read,
4987 .aio_read = ll_file_aio_read,
4988 .write = ll_file_write,
4989 .aio_write = ll_file_aio_write,
4990 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
4991 .unlocked_ioctl = ll_file_ioctl,
4992 .open = ll_file_open,
4993 .release = ll_file_release,
4994 .mmap = ll_file_mmap,
4995 .llseek = ll_file_seek,
4996 .splice_read = ll_file_splice_read,
5001 struct file_operations ll_file_operations_flock = {
5002 #ifdef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
5003 # ifdef HAVE_SYNC_READ_WRITE
5004 .read = new_sync_read,
5005 .write = new_sync_write,
5006 # endif /* HAVE_SYNC_READ_WRITE */
5007 .read_iter = ll_file_read_iter,
5008 .write_iter = ll_file_write_iter,
5009 #else /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5010 .read = ll_file_read,
5011 .aio_read = ll_file_aio_read,
5012 .write = ll_file_write,
5013 .aio_write = ll_file_aio_write,
5014 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5015 .unlocked_ioctl = ll_file_ioctl,
5016 .open = ll_file_open,
5017 .release = ll_file_release,
5018 .mmap = ll_file_mmap,
5019 .llseek = ll_file_seek,
5020 .splice_read = ll_file_splice_read,
5023 .flock = ll_file_flock,
5024 .lock = ll_file_flock
5027 /* These are for -o noflock - to return ENOSYS on flock calls */
5028 struct file_operations ll_file_operations_noflock = {
5029 #ifdef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
5030 # ifdef HAVE_SYNC_READ_WRITE
5031 .read = new_sync_read,
5032 .write = new_sync_write,
5033 # endif /* HAVE_SYNC_READ_WRITE */
5034 .read_iter = ll_file_read_iter,
5035 .write_iter = ll_file_write_iter,
5036 #else /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5037 .read = ll_file_read,
5038 .aio_read = ll_file_aio_read,
5039 .write = ll_file_write,
5040 .aio_write = ll_file_aio_write,
5041 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5042 .unlocked_ioctl = ll_file_ioctl,
5043 .open = ll_file_open,
5044 .release = ll_file_release,
5045 .mmap = ll_file_mmap,
5046 .llseek = ll_file_seek,
5047 .splice_read = ll_file_splice_read,
5050 .flock = ll_file_noflock,
5051 .lock = ll_file_noflock
5054 struct inode_operations ll_file_inode_operations = {
5055 .setattr = ll_setattr,
5056 .getattr = ll_getattr,
5057 .permission = ll_inode_permission,
5058 #ifdef HAVE_IOP_XATTR
5059 .setxattr = ll_setxattr,
5060 .getxattr = ll_getxattr,
5061 .removexattr = ll_removexattr,
5063 .listxattr = ll_listxattr,
5064 .fiemap = ll_fiemap,
5065 #ifdef HAVE_IOP_GET_ACL
5066 .get_acl = ll_get_acl,
5068 #ifdef HAVE_IOP_SET_ACL
5069 .set_acl = ll_set_acl,
5073 int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf)
5075 struct ll_inode_info *lli = ll_i2info(inode);
5076 struct cl_object *obj = lli->lli_clob;
5085 env = cl_env_get(&refcheck);
5087 RETURN(PTR_ERR(env));
5089 rc = cl_conf_set(env, lli->lli_clob, conf);
5093 if (conf->coc_opc == OBJECT_CONF_SET) {
5094 struct ldlm_lock *lock = conf->coc_lock;
5095 struct cl_layout cl = {
5099 LASSERT(lock != NULL);
5100 LASSERT(ldlm_has_layout(lock));
5102 /* it can only be allowed to match after layout is
5103 * applied to inode otherwise false layout would be
5104 * seen. Applying layout shoud happen before dropping
5105 * the intent lock. */
5106 ldlm_lock_allow_match(lock);
5108 rc = cl_object_layout_get(env, obj, &cl);
5113 DFID": layout version change: %u -> %u\n",
5114 PFID(&lli->lli_fid), ll_layout_version_get(lli),
5116 ll_layout_version_set(lli, cl.cl_layout_gen);
5120 cl_env_put(env, &refcheck);
5125 /* Fetch layout from MDT with getxattr request, if it's not ready yet */
5126 static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
5129 struct ll_sb_info *sbi = ll_i2sbi(inode);
5130 struct ptlrpc_request *req;
5137 CDEBUG(D_INODE, DFID" LVB_READY=%d l_lvb_data=%p l_lvb_len=%d\n",
5138 PFID(ll_inode2fid(inode)), ldlm_is_lvb_ready(lock),
5139 lock->l_lvb_data, lock->l_lvb_len);
5141 if (lock->l_lvb_data != NULL)
5144 /* if layout lock was granted right away, the layout is returned
5145 * within DLM_LVB of dlm reply; otherwise if the lock was ever
5146 * blocked and then granted via completion ast, we have to fetch
5147 * layout here. Please note that we can't use the LVB buffer in
5148 * completion AST because it doesn't have a large enough buffer */
5149 rc = ll_get_default_mdsize(sbi, &lmmsize);
5153 rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), OBD_MD_FLXATTR,
5154 XATTR_NAME_LOV, lmmsize, &req);
5157 GOTO(out, rc = 0); /* empty layout */
5164 if (lmmsize == 0) /* empty layout */
5167 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA, lmmsize);
5169 GOTO(out, rc = -EFAULT);
5171 OBD_ALLOC_LARGE(lvbdata, lmmsize);
5172 if (lvbdata == NULL)
5173 GOTO(out, rc = -ENOMEM);
5175 memcpy(lvbdata, lmm, lmmsize);
5176 lock_res_and_lock(lock);
5177 if (unlikely(lock->l_lvb_data == NULL)) {
5178 lock->l_lvb_type = LVB_T_LAYOUT;
5179 lock->l_lvb_data = lvbdata;
5180 lock->l_lvb_len = lmmsize;
5183 unlock_res_and_lock(lock);
5186 OBD_FREE_LARGE(lvbdata, lmmsize);
5191 ptlrpc_req_finished(req);
5196 * Apply the layout to the inode. Layout lock is held and will be released
5199 static int ll_layout_lock_set(struct lustre_handle *lockh, enum ldlm_mode mode,
5200 struct inode *inode)
5202 struct ll_inode_info *lli = ll_i2info(inode);
5203 struct ll_sb_info *sbi = ll_i2sbi(inode);
5204 struct ldlm_lock *lock;
5205 struct cl_object_conf conf;
5208 bool wait_layout = false;
5211 LASSERT(lustre_handle_is_used(lockh));
5213 lock = ldlm_handle2lock(lockh);
5214 LASSERT(lock != NULL);
5215 LASSERT(ldlm_has_layout(lock));
5217 LDLM_DEBUG(lock, "file "DFID"(%p) being reconfigured",
5218 PFID(&lli->lli_fid), inode);
5220 /* in case this is a caching lock and reinstate with new inode */
5221 md_set_lock_data(sbi->ll_md_exp, lockh, inode, NULL);
5223 lock_res_and_lock(lock);
5224 lvb_ready = ldlm_is_lvb_ready(lock);
5225 unlock_res_and_lock(lock);
5227 /* checking lvb_ready is racy but this is okay. The worst case is
5228 * that multi processes may configure the file on the same time. */
5232 rc = ll_layout_fetch(inode, lock);
5236 /* for layout lock, lmm is stored in lock's lvb.
5237 * lvb_data is immutable if the lock is held so it's safe to access it
5240 * set layout to file. Unlikely this will fail as old layout was
5241 * surely eliminated */
5242 memset(&conf, 0, sizeof conf);
5243 conf.coc_opc = OBJECT_CONF_SET;
5244 conf.coc_inode = inode;
5245 conf.coc_lock = lock;
5246 conf.u.coc_layout.lb_buf = lock->l_lvb_data;
5247 conf.u.coc_layout.lb_len = lock->l_lvb_len;
5248 rc = ll_layout_conf(inode, &conf);
5250 /* refresh layout failed, need to wait */
5251 wait_layout = rc == -EBUSY;
5254 LDLM_LOCK_PUT(lock);
5255 ldlm_lock_decref(lockh, mode);
5257 /* wait for IO to complete if it's still being used. */
5259 CDEBUG(D_INODE, "%s: "DFID"(%p) wait for layout reconf\n",
5260 sbi->ll_fsname, PFID(&lli->lli_fid), inode);
5262 memset(&conf, 0, sizeof conf);
5263 conf.coc_opc = OBJECT_CONF_WAIT;
5264 conf.coc_inode = inode;
5265 rc = ll_layout_conf(inode, &conf);
5269 CDEBUG(D_INODE, "%s file="DFID" waiting layout return: %d\n",
5270 sbi->ll_fsname, PFID(&lli->lli_fid), rc);
5276 * Issue layout intent RPC to MDS.
5277 * \param inode [in] file inode
5278 * \param intent [in] layout intent
5280 * \retval 0 on success
5281 * \retval < 0 error code
5283 static int ll_layout_intent(struct inode *inode, struct layout_intent *intent)
5285 struct ll_inode_info *lli = ll_i2info(inode);
5286 struct ll_sb_info *sbi = ll_i2sbi(inode);
5287 struct md_op_data *op_data;
5288 struct lookup_intent it;
5289 struct ptlrpc_request *req;
5293 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL,
5294 0, 0, LUSTRE_OPC_ANY, NULL);
5295 if (IS_ERR(op_data))
5296 RETURN(PTR_ERR(op_data));
5298 op_data->op_data = intent;
5299 op_data->op_data_size = sizeof(*intent);
5301 memset(&it, 0, sizeof(it));
5302 it.it_op = IT_LAYOUT;
5303 if (intent->li_opc == LAYOUT_INTENT_WRITE ||
5304 intent->li_opc == LAYOUT_INTENT_TRUNC)
5305 it.it_flags = FMODE_WRITE;
5307 LDLM_DEBUG_NOLOCK("%s: requeue layout lock for file "DFID"(%p)",
5308 sbi->ll_fsname, PFID(&lli->lli_fid), inode);
5310 rc = md_intent_lock(sbi->ll_md_exp, op_data, &it, &req,
5311 &ll_md_blocking_ast, 0);
5312 if (it.it_request != NULL)
5313 ptlrpc_req_finished(it.it_request);
5314 it.it_request = NULL;
5316 ll_finish_md_op_data(op_data);
5318 /* set lock data in case this is a new lock */
5320 ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL);
5322 ll_intent_drop_lock(&it);
5328 * This function checks if there exists a LAYOUT lock on the client side,
5329 * or enqueues it if it doesn't have one in cache.
5331 * This function will not hold layout lock so it may be revoked any time after
5332 * this function returns. Any operations depend on layout should be redone
5335 * This function should be called before lov_io_init() to get an uptodate
5336 * layout version, the caller should save the version number and after IO
5337 * is finished, this function should be called again to verify that layout
5338 * is not changed during IO time.
5340 int ll_layout_refresh(struct inode *inode, __u32 *gen)
5342 struct ll_inode_info *lli = ll_i2info(inode);
5343 struct ll_sb_info *sbi = ll_i2sbi(inode);
5344 struct lustre_handle lockh;
5345 struct layout_intent intent = {
5346 .li_opc = LAYOUT_INTENT_ACCESS,
5348 enum ldlm_mode mode;
5352 *gen = ll_layout_version_get(lli);
5353 if (!(sbi->ll_flags & LL_SBI_LAYOUT_LOCK) || *gen != CL_LAYOUT_GEN_NONE)
5357 LASSERT(fid_is_sane(ll_inode2fid(inode)));
5358 LASSERT(S_ISREG(inode->i_mode));
5360 /* take layout lock mutex to enqueue layout lock exclusively. */
5361 mutex_lock(&lli->lli_layout_mutex);
5364 /* mostly layout lock is caching on the local side, so try to
5365 * match it before grabbing layout lock mutex. */
5366 mode = ll_take_md_lock(inode, MDS_INODELOCK_LAYOUT, &lockh, 0,
5367 LCK_CR | LCK_CW | LCK_PR |
5369 if (mode != 0) { /* hit cached lock */
5370 rc = ll_layout_lock_set(&lockh, mode, inode);
5376 rc = ll_layout_intent(inode, &intent);
5382 *gen = ll_layout_version_get(lli);
5383 mutex_unlock(&lli->lli_layout_mutex);
5389 * Issue layout intent RPC indicating where in a file an IO is about to write.
5391 * \param[in] inode file inode.
5392 * \param[in] ext write range with start offset of fille in bytes where
5393 * an IO is about to write, and exclusive end offset in
5396 * \retval 0 on success
5397 * \retval < 0 error code
5399 int ll_layout_write_intent(struct inode *inode, enum layout_intent_opc opc,
5400 struct lu_extent *ext)
5402 struct layout_intent intent = {
5404 .li_extent.e_start = ext->e_start,
5405 .li_extent.e_end = ext->e_end,
5410 rc = ll_layout_intent(inode, &intent);
5416 * This function send a restore request to the MDT
5418 int ll_layout_restore(struct inode *inode, loff_t offset, __u64 length)
5420 struct hsm_user_request *hur;
5424 len = sizeof(struct hsm_user_request) +
5425 sizeof(struct hsm_user_item);
5426 OBD_ALLOC(hur, len);
5430 hur->hur_request.hr_action = HUA_RESTORE;
5431 hur->hur_request.hr_archive_id = 0;
5432 hur->hur_request.hr_flags = 0;
5433 memcpy(&hur->hur_user_item[0].hui_fid, &ll_i2info(inode)->lli_fid,
5434 sizeof(hur->hur_user_item[0].hui_fid));
5435 hur->hur_user_item[0].hui_extent.offset = offset;
5436 hur->hur_user_item[0].hui_extent.length = length;
5437 hur->hur_request.hr_itemcount = 1;
5438 rc = obd_iocontrol(LL_IOC_HSM_REQUEST, ll_i2sbi(inode)->ll_md_exp,