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/
33 * Author: Peter Braam <braam@clusterfs.com>
34 * Author: Phil Schwan <phil@clusterfs.com>
35 * Author: Andreas Dilger <adilger@clusterfs.com>
38 #define DEBUG_SUBSYSTEM S_LLITE
39 #include <lustre_dlm.h>
40 #include <linux/pagemap.h>
41 #include <linux/file.h>
42 #include <linux/sched.h>
43 #include <linux/user_namespace.h>
44 #include <linux/uidgid.h>
45 #include <linux/falloc.h>
46 #include <linux/ktime.h>
48 #include <uapi/linux/lustre/lustre_ioctl.h>
49 #include <lustre_swab.h>
51 #include "cl_object.h"
52 #include "llite_internal.h"
53 #include "vvp_internal.h"
56 struct inode *sp_inode;
61 __u64 pa_data_version;
67 ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg);
69 static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
72 static struct ll_file_data *ll_file_data_get(void)
74 struct ll_file_data *fd;
76 OBD_SLAB_ALLOC_PTR_GFP(fd, ll_file_data_slab, GFP_NOFS);
80 fd->fd_write_failed = false;
81 pcc_file_init(&fd->fd_pcc_file);
86 static void ll_file_data_put(struct ll_file_data *fd)
89 OBD_SLAB_FREE_PTR(fd, ll_file_data_slab);
93 * Packs all the attributes into @op_data for the CLOSE rpc.
95 static void ll_prepare_close(struct inode *inode, struct md_op_data *op_data,
96 struct obd_client_handle *och)
100 ll_prep_md_op_data(op_data, inode, NULL, NULL,
101 0, 0, LUSTRE_OPC_ANY, NULL);
103 op_data->op_attr.ia_mode = inode->i_mode;
104 op_data->op_attr.ia_atime = inode->i_atime;
105 op_data->op_attr.ia_mtime = inode->i_mtime;
106 op_data->op_attr.ia_ctime = inode->i_ctime;
107 /* In case of encrypted file without the key, visible size was rounded
108 * up to next LUSTRE_ENCRYPTION_UNIT_SIZE, and clear text size was
109 * stored into lli_lazysize in ll_merge_attr(), so set proper file size
110 * now that we are closing.
112 if (llcrypt_require_key(inode) == -ENOKEY &&
113 ll_i2info(inode)->lli_attr_valid & OBD_MD_FLLAZYSIZE)
114 op_data->op_attr.ia_size = ll_i2info(inode)->lli_lazysize;
116 op_data->op_attr.ia_size = i_size_read(inode);
117 op_data->op_attr.ia_valid |= (ATTR_MODE | ATTR_ATIME | ATTR_ATIME_SET |
118 ATTR_MTIME | ATTR_MTIME_SET |
120 op_data->op_xvalid |= OP_XVALID_CTIME_SET;
121 op_data->op_attr_blocks = inode->i_blocks;
122 op_data->op_attr_flags = ll_inode_to_ext_flags(inode->i_flags);
123 if (test_bit(LLIF_PROJECT_INHERIT, &ll_i2info(inode)->lli_flags))
124 op_data->op_attr_flags |= LUSTRE_PROJINHERIT_FL;
125 op_data->op_open_handle = och->och_open_handle;
127 if (och->och_flags & FMODE_WRITE &&
128 test_and_clear_bit(LLIF_DATA_MODIFIED, &ll_i2info(inode)->lli_flags))
129 /* For HSM: if inode data has been modified, pack it so that
130 * MDT can set data dirty flag in the archive. */
131 op_data->op_bias |= MDS_DATA_MODIFIED;
137 * Perform a close, possibly with a bias.
138 * The meaning of "data" depends on the value of "bias".
140 * If \a bias is MDS_HSM_RELEASE then \a data is a pointer to the data version.
141 * If \a bias is MDS_CLOSE_LAYOUT_SWAP then \a data is a pointer to the inode to
144 static int ll_close_inode_openhandle(struct inode *inode,
145 struct obd_client_handle *och,
146 enum mds_op_bias bias, void *data)
148 struct obd_export *md_exp = ll_i2mdexp(inode);
149 const struct ll_inode_info *lli = ll_i2info(inode);
150 struct md_op_data *op_data;
151 struct ptlrpc_request *req = NULL;
155 if (class_exp2obd(md_exp) == NULL) {
156 CERROR("%s: invalid MDC connection handle closing "DFID"\n",
157 ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
161 OBD_ALLOC_PTR(op_data);
162 /* We leak openhandle and request here on error, but not much to be
163 * done in OOM case since app won't retry close on error either. */
165 GOTO(out, rc = -ENOMEM);
167 ll_prepare_close(inode, op_data, och);
169 case MDS_CLOSE_LAYOUT_MERGE:
170 /* merge blocks from the victim inode */
171 op_data->op_attr_blocks += ((struct inode *)data)->i_blocks;
172 op_data->op_attr.ia_valid |= ATTR_SIZE;
173 op_data->op_xvalid |= OP_XVALID_BLOCKS;
175 case MDS_CLOSE_LAYOUT_SPLIT:
176 case MDS_CLOSE_LAYOUT_SWAP: {
177 struct split_param *sp = data;
179 LASSERT(data != NULL);
180 op_data->op_bias |= bias;
181 op_data->op_data_version = 0;
182 op_data->op_lease_handle = och->och_lease_handle;
183 if (bias == MDS_CLOSE_LAYOUT_SPLIT) {
184 op_data->op_fid2 = *ll_inode2fid(sp->sp_inode);
185 op_data->op_mirror_id = sp->sp_mirror_id;
187 op_data->op_fid2 = *ll_inode2fid(data);
192 case MDS_CLOSE_RESYNC_DONE: {
193 struct ll_ioc_lease *ioc = data;
195 LASSERT(data != NULL);
196 op_data->op_attr_blocks +=
197 ioc->lil_count * op_data->op_attr_blocks;
198 op_data->op_attr.ia_valid |= ATTR_SIZE;
199 op_data->op_xvalid |= OP_XVALID_BLOCKS;
200 op_data->op_bias |= MDS_CLOSE_RESYNC_DONE;
202 op_data->op_lease_handle = och->och_lease_handle;
203 op_data->op_data = &ioc->lil_ids[0];
204 op_data->op_data_size =
205 ioc->lil_count * sizeof(ioc->lil_ids[0]);
209 case MDS_PCC_ATTACH: {
210 struct pcc_param *param = data;
212 LASSERT(data != NULL);
213 op_data->op_bias |= MDS_HSM_RELEASE | MDS_PCC_ATTACH;
214 op_data->op_archive_id = param->pa_archive_id;
215 op_data->op_data_version = param->pa_data_version;
216 op_data->op_lease_handle = och->och_lease_handle;
220 case MDS_HSM_RELEASE:
221 LASSERT(data != NULL);
222 op_data->op_bias |= MDS_HSM_RELEASE;
223 op_data->op_data_version = *(__u64 *)data;
224 op_data->op_lease_handle = och->och_lease_handle;
225 op_data->op_attr.ia_valid |= ATTR_SIZE;
226 op_data->op_xvalid |= OP_XVALID_BLOCKS;
230 LASSERT(data == NULL);
234 if (!(op_data->op_attr.ia_valid & ATTR_SIZE))
235 op_data->op_xvalid |= OP_XVALID_LAZYSIZE;
236 if (!(op_data->op_xvalid & OP_XVALID_BLOCKS))
237 op_data->op_xvalid |= OP_XVALID_LAZYBLOCKS;
239 rc = md_close(md_exp, op_data, och->och_mod, &req);
240 if (rc != 0 && rc != -EINTR)
241 CERROR("%s: inode "DFID" mdc close failed: rc = %d\n",
242 md_exp->exp_obd->obd_name, PFID(&lli->lli_fid), rc);
244 if (rc == 0 && op_data->op_bias & bias) {
245 struct mdt_body *body;
247 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
248 if (!(body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED))
251 if (bias & MDS_PCC_ATTACH) {
252 struct pcc_param *param = data;
254 param->pa_layout_gen = body->mbo_layout_gen;
258 ll_finish_md_op_data(op_data);
262 md_clear_open_replay_data(md_exp, och);
263 och->och_open_handle.cookie = DEAD_HANDLE_MAGIC;
266 ptlrpc_req_finished(req); /* This is close request */
270 int ll_md_real_close(struct inode *inode, fmode_t fmode)
272 struct ll_inode_info *lli = ll_i2info(inode);
273 struct obd_client_handle **och_p;
274 struct obd_client_handle *och;
279 if (fmode & FMODE_WRITE) {
280 och_p = &lli->lli_mds_write_och;
281 och_usecount = &lli->lli_open_fd_write_count;
282 } else if (fmode & FMODE_EXEC) {
283 och_p = &lli->lli_mds_exec_och;
284 och_usecount = &lli->lli_open_fd_exec_count;
286 LASSERT(fmode & FMODE_READ);
287 och_p = &lli->lli_mds_read_och;
288 och_usecount = &lli->lli_open_fd_read_count;
291 mutex_lock(&lli->lli_och_mutex);
292 if (*och_usecount > 0) {
293 /* There are still users of this handle, so skip
295 mutex_unlock(&lli->lli_och_mutex);
301 mutex_unlock(&lli->lli_och_mutex);
304 /* There might be a race and this handle may already
306 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
312 static int ll_md_close(struct inode *inode, struct file *file)
314 union ldlm_policy_data policy = {
315 .l_inodebits = { MDS_INODELOCK_OPEN },
317 __u64 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
318 struct ll_file_data *fd = file->private_data;
319 struct ll_inode_info *lli = ll_i2info(inode);
320 struct lustre_handle lockh;
321 enum ldlm_mode lockmode;
325 /* clear group lock, if present */
326 if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED))
327 ll_put_grouplock(inode, file, fd->fd_grouplock.lg_gid);
329 mutex_lock(&lli->lli_och_mutex);
330 if (fd->fd_lease_och != NULL) {
332 struct obd_client_handle *lease_och;
334 lease_och = fd->fd_lease_och;
335 fd->fd_lease_och = NULL;
336 mutex_unlock(&lli->lli_och_mutex);
338 /* Usually the lease is not released when the
339 * application crashed, we need to release here. */
340 rc = ll_lease_close(lease_och, inode, &lease_broken);
342 mutex_lock(&lli->lli_och_mutex);
344 CDEBUG_LIMIT(rc ? D_ERROR : D_INODE,
345 "Clean up lease "DFID" %d/%d\n",
346 PFID(&lli->lli_fid), rc, lease_broken);
349 if (fd->fd_och != NULL) {
350 struct obd_client_handle *och;
354 mutex_unlock(&lli->lli_och_mutex);
356 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
360 /* Let's see if we have good enough OPEN lock on the file and if
361 we can skip talking to MDS */
362 if (fd->fd_omode & FMODE_WRITE) {
364 LASSERT(lli->lli_open_fd_write_count);
365 lli->lli_open_fd_write_count--;
366 } else if (fd->fd_omode & FMODE_EXEC) {
368 LASSERT(lli->lli_open_fd_exec_count);
369 lli->lli_open_fd_exec_count--;
372 LASSERT(lli->lli_open_fd_read_count);
373 lli->lli_open_fd_read_count--;
375 mutex_unlock(&lli->lli_och_mutex);
377 /* LU-4398: do not cache write open lock if the file has exec bit */
378 if ((lockmode == LCK_CW && inode->i_mode & S_IXUGO) ||
379 !md_lock_match(ll_i2mdexp(inode), flags, ll_inode2fid(inode),
380 LDLM_IBITS, &policy, lockmode, &lockh))
381 rc = ll_md_real_close(inode, fd->fd_omode);
384 file->private_data = NULL;
385 ll_file_data_put(fd);
390 /* While this returns an error code, fput() the caller does not, so we need
391 * to make every effort to clean up all of our state here. Also, applications
392 * rarely check close errors and even if an error is returned they will not
393 * re-try the close call.
395 int ll_file_release(struct inode *inode, struct file *file)
397 struct ll_file_data *fd;
398 struct ll_sb_info *sbi = ll_i2sbi(inode);
399 struct ll_inode_info *lli = ll_i2info(inode);
400 ktime_t kstart = ktime_get();
405 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
406 PFID(ll_inode2fid(inode)), inode);
408 fd = file->private_data;
411 /* The last ref on @file, maybe not the the owner pid of statahead,
412 * because parent and child process can share the same file handle. */
413 if (S_ISDIR(inode->i_mode) && lli->lli_opendir_key == fd)
414 ll_deauthorize_statahead(inode, fd);
416 if (is_root_inode(inode)) {
417 file->private_data = NULL;
418 ll_file_data_put(fd);
422 pcc_file_release(inode, file);
424 if (!S_ISDIR(inode->i_mode)) {
425 if (lli->lli_clob != NULL)
426 lov_read_and_clear_async_rc(lli->lli_clob);
427 lli->lli_async_rc = 0;
430 lli->lli_close_fd_time = ktime_get();
432 rc = ll_md_close(inode, file);
434 if (CFS_FAIL_TIMEOUT_MS(OBD_FAIL_PTLRPC_DUMP_LOG, cfs_fail_val))
435 libcfs_debug_dumplog();
438 if (!rc && !is_root_inode(inode))
439 ll_stats_ops_tally(sbi, LPROC_LL_RELEASE,
440 ktime_us_delta(ktime_get(), kstart));
444 static inline int ll_dom_readpage(void *data, struct page *page)
446 /* since ll_dom_readpage is a page cache helper, it is safe to assume
447 * mapping and host pointers are set here
450 struct niobuf_local *lnb = data;
454 inode = page2inode(page);
456 kaddr = kmap_atomic(page);
457 memcpy(kaddr, lnb->lnb_data, lnb->lnb_len);
458 if (lnb->lnb_len < PAGE_SIZE)
459 memset(kaddr + lnb->lnb_len, 0,
460 PAGE_SIZE - lnb->lnb_len);
461 kunmap_atomic(kaddr);
463 if (inode && IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode)) {
464 if (!llcrypt_has_encryption_key(inode)) {
465 CDEBUG(D_SEC, "no enc key for "DFID"\n",
466 PFID(ll_inode2fid(inode)));
469 unsigned int offs = 0;
471 while (offs < PAGE_SIZE) {
472 /* decrypt only if page is not empty */
473 if (memcmp(page_address(page) + offs,
474 page_address(ZERO_PAGE(0)),
475 LUSTRE_ENCRYPTION_UNIT_SIZE) == 0)
478 rc = llcrypt_decrypt_pagecache_blocks(page,
479 LUSTRE_ENCRYPTION_UNIT_SIZE,
484 offs += LUSTRE_ENCRYPTION_UNIT_SIZE;
489 flush_dcache_page(page);
490 SetPageUptodate(page);
497 #ifdef HAVE_READ_CACHE_PAGE_WANTS_FILE
498 static inline int ll_dom_read_folio(struct file *file, struct folio *folio0)
500 return ll_dom_readpage(file->private_data, folio_page(folio0, 0));
503 #define ll_dom_read_folio ll_dom_readpage
506 void ll_dom_finish_open(struct inode *inode, struct ptlrpc_request *req)
510 struct ll_inode_info *lli = ll_i2info(inode);
511 struct cl_object *obj = lli->lli_clob;
512 struct address_space *mapping = inode->i_mapping;
514 struct niobuf_remote *rnb;
515 struct mdt_body *body;
517 unsigned long index, start;
518 struct niobuf_local lnb;
527 if (!req_capsule_field_present(&req->rq_pill, &RMF_NIOBUF_INLINE,
531 rnb = req_capsule_server_get(&req->rq_pill, &RMF_NIOBUF_INLINE);
532 if (rnb == NULL || rnb->rnb_len == 0)
535 /* LU-11595: Server may return whole file and that is OK always or
536 * it may return just file tail and its offset must be aligned with
537 * client PAGE_SIZE to be used on that client, if server's PAGE_SIZE is
538 * smaller then offset may be not aligned and that data is just ignored.
540 if (rnb->rnb_offset & ~PAGE_MASK)
543 /* Server returns whole file or just file tail if it fills in reply
544 * buffer, in both cases total size should be equal to the file size.
546 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
547 if (rnb->rnb_offset + rnb->rnb_len != body->mbo_dom_size &&
548 !(inode && IS_ENCRYPTED(inode))) {
549 CERROR("%s: server returns off/len %llu/%u but size %llu\n",
550 ll_i2sbi(inode)->ll_fsname, rnb->rnb_offset,
551 rnb->rnb_len, body->mbo_dom_size);
555 env = cl_env_get(&refcheck);
558 io = vvp_env_thread_io(env);
560 io->ci_ignore_layout = 1;
561 rc = cl_io_init(env, io, CIT_MISC, obj);
565 CDEBUG(D_INFO, "Get data along with open at %llu len %i, size %llu\n",
566 rnb->rnb_offset, rnb->rnb_len, body->mbo_dom_size);
568 data = (char *)rnb + sizeof(*rnb);
570 lnb.lnb_file_offset = rnb->rnb_offset;
571 start = lnb.lnb_file_offset >> PAGE_SHIFT;
573 LASSERT((lnb.lnb_file_offset & ~PAGE_MASK) == 0);
574 lnb.lnb_page_offset = 0;
576 struct cl_page *page;
578 lnb.lnb_data = data + (index << PAGE_SHIFT);
579 lnb.lnb_len = rnb->rnb_len - (index << PAGE_SHIFT);
580 if (lnb.lnb_len > PAGE_SIZE)
581 lnb.lnb_len = PAGE_SIZE;
583 vmpage = ll_read_cache_page(mapping, index + start,
584 ll_dom_read_folio, &lnb);
585 if (IS_ERR(vmpage)) {
586 CWARN("%s: cannot fill page %lu for "DFID
587 " with data: rc = %li\n",
588 ll_i2sbi(inode)->ll_fsname, index + start,
589 PFID(lu_object_fid(&obj->co_lu)),
594 if (vmpage->mapping == NULL) {
597 /* page was truncated */
600 /* attach VM page to CL page cache */
601 page = cl_page_find(env, obj, vmpage->index, vmpage,
604 ClearPageUptodate(vmpage);
609 SetPageUptodate(vmpage);
610 cl_page_put(env, page);
614 } while (rnb->rnb_len > (index << PAGE_SHIFT));
618 cl_env_put(env, &refcheck);
623 static int ll_intent_file_open(struct dentry *de, void *lmm, int lmmsize,
624 struct lookup_intent *itp)
626 struct ll_sb_info *sbi = ll_i2sbi(de->d_inode);
627 struct dentry *parent = de->d_parent;
630 struct md_op_data *op_data;
631 struct ptlrpc_request *req = NULL;
635 LASSERT(parent != NULL);
636 LASSERT(itp->it_flags & MDS_OPEN_BY_FID);
638 /* if server supports open-by-fid, or file name is invalid, don't pack
639 * name in open request */
640 if (CFS_FAIL_CHECK(OBD_FAIL_LLITE_OPEN_BY_NAME) ||
641 !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_OPEN_BY_FID)) {
643 len = de->d_name.len;
644 name = kmalloc(len + 1, GFP_NOFS);
649 spin_lock(&de->d_lock);
650 if (len != de->d_name.len) {
651 spin_unlock(&de->d_lock);
655 memcpy(name, de->d_name.name, len);
657 spin_unlock(&de->d_lock);
659 if (!lu_name_is_valid_2(name, len)) {
665 op_data = ll_prep_md_op_data(NULL, parent->d_inode, de->d_inode,
666 name, len, 0, LUSTRE_OPC_OPEN, NULL);
667 if (IS_ERR(op_data)) {
669 RETURN(PTR_ERR(op_data));
671 op_data->op_data = lmm;
672 op_data->op_data_size = lmmsize;
674 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_OPEN_DELAY, cfs_fail_val);
676 rc = md_intent_lock(sbi->ll_md_exp, op_data, itp, &req,
677 &ll_md_blocking_ast, 0);
679 ll_finish_md_op_data(op_data);
681 /* reason for keep own exit path - don`t flood log
682 * with messages with -ESTALE errors.
684 if (!it_disposition(itp, DISP_OPEN_OPEN) ||
685 it_open_error(DISP_OPEN_OPEN, itp))
687 ll_release_openhandle(de, itp);
691 if (it_disposition(itp, DISP_LOOKUP_NEG))
692 GOTO(out, rc = -ENOENT);
694 if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) {
695 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp);
696 CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc);
700 rc = ll_prep_inode(&de->d_inode, &req->rq_pill, NULL, itp);
702 if (!rc && itp->it_lock_mode) {
705 /* If we got a lock back and it has a LOOKUP bit set,
706 * make sure the dentry is marked as valid so we can find it.
707 * We don't need to care about actual hashing since other bits
708 * of kernel will deal with that later.
710 ll_set_lock_data(sbi->ll_md_exp, de->d_inode, itp, &bits);
711 if (bits & MDS_INODELOCK_LOOKUP)
712 d_lustre_revalidate(de);
714 /* if DoM bit returned along with LAYOUT bit then there
715 * can be read-on-open data returned.
717 if (bits & MDS_INODELOCK_DOM && bits & MDS_INODELOCK_LAYOUT)
718 ll_dom_finish_open(de->d_inode, req);
720 /* open may not fetch LOOKUP lock, update dir depth and default LMV
723 if (!rc && S_ISDIR(de->d_inode->i_mode))
724 ll_update_dir_depth_dmv(parent->d_inode, de);
727 ptlrpc_req_finished(req);
728 ll_intent_drop_lock(itp);
730 /* We did open by fid, but by the time we got to the server, the object
731 * disappeared. This is possible if the object was unlinked, but it's
732 * also possible if the object was unlinked by a rename. In the case
733 * of an object renamed over our existing one, we can't fail this open.
734 * O_CREAT also goes through this path if we had an existing dentry,
735 * and it's obviously wrong to return ENOENT for O_CREAT.
737 * Instead let's return -ESTALE, and the VFS will retry the open with
738 * LOOKUP_REVAL, which we catch in ll_revalidate_dentry and fail to
739 * revalidate, causing a lookup. This causes extra lookups in the case
740 * where we had a dentry in cache but the file is being unlinked and we
741 * lose the race with unlink, but this should be very rare.
749 static int ll_och_fill(struct obd_export *md_exp, struct lookup_intent *it,
750 struct obd_client_handle *och)
752 struct mdt_body *body;
754 body = req_capsule_server_get(&it->it_request->rq_pill, &RMF_MDT_BODY);
755 och->och_open_handle = body->mbo_open_handle;
756 och->och_fid = body->mbo_fid1;
757 och->och_lease_handle.cookie = it->it_lock_handle;
758 och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
759 och->och_flags = it->it_flags;
761 return md_set_open_replay_data(md_exp, och, it);
764 static int ll_local_open(struct file *file, struct lookup_intent *it,
765 struct ll_file_data *fd, struct obd_client_handle *och)
767 struct inode *inode = file_inode(file);
770 LASSERT(!file->private_data);
777 rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och);
782 file->private_data = fd;
783 ll_readahead_init(inode, &fd->fd_ras);
784 fd->fd_omode = it->it_flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
789 void ll_track_file_opens(struct inode *inode)
791 struct ll_inode_info *lli = ll_i2info(inode);
792 struct ll_sb_info *sbi = ll_i2sbi(inode);
794 /* do not skew results with delays from never-opened inodes */
795 if (ktime_to_ns(lli->lli_close_fd_time))
796 ll_stats_ops_tally(sbi, LPROC_LL_INODE_OPCLTM,
797 ktime_us_delta(ktime_get(), lli->lli_close_fd_time));
799 if (ktime_after(ktime_get(),
800 ktime_add_ms(lli->lli_close_fd_time,
801 sbi->ll_oc_max_ms))) {
802 lli->lli_open_fd_count = 1;
803 lli->lli_close_fd_time = ns_to_ktime(0);
805 lli->lli_open_fd_count++;
808 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_OCOUNT,
809 lli->lli_open_fd_count);
812 /* Open a file, and (for the very first open) create objects on the OSTs at
813 * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object
814 * creation or open until ll_lov_setstripe() ioctl is called.
816 * If we already have the stripe MD locally then we don't request it in
817 * md_open(), by passing a lmm_size = 0.
819 * It is up to the application to ensure no other processes open this file
820 * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
821 * used. We might be able to avoid races of that sort by getting lli_open_sem
822 * before returning in the O_LOV_DELAY_CREATE case and dropping it here
823 * or in ll_file_release(), but I'm not sure that is desirable/necessary.
825 int ll_file_open(struct inode *inode, struct file *file)
827 struct ll_inode_info *lli = ll_i2info(inode);
828 struct lookup_intent *it, oit = { .it_op = IT_OPEN,
829 .it_flags = file->f_flags };
830 struct obd_client_handle **och_p = NULL;
831 __u64 *och_usecount = NULL;
832 struct ll_file_data *fd;
833 ktime_t kstart = ktime_get();
837 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), flags %o\n",
838 PFID(ll_inode2fid(inode)), inode, file->f_flags);
840 it = file->private_data; /* XXX: compat macro */
841 file->private_data = NULL; /* prevent ll_local_open assertion */
843 if (S_ISREG(inode->i_mode)) {
844 rc = ll_file_open_encrypt(inode, file);
846 if (it && it->it_disposition)
847 ll_release_openhandle(file_dentry(file), it);
848 GOTO(out_nofiledata, rc);
852 fd = ll_file_data_get();
854 GOTO(out_nofiledata, rc = -ENOMEM);
857 if (S_ISDIR(inode->i_mode))
858 ll_authorize_statahead(inode, fd);
860 ll_track_file_opens(inode);
861 if (is_root_inode(inode)) {
862 file->private_data = fd;
866 if (!it || !it->it_disposition) {
867 /* Convert f_flags into access mode. We cannot use file->f_mode,
868 * because everything but O_ACCMODE mask was stripped from
870 if ((oit.it_flags + 1) & O_ACCMODE)
872 if (file->f_flags & O_TRUNC)
873 oit.it_flags |= FMODE_WRITE;
875 /* kernel only call f_op->open in dentry_open. filp_open calls
876 * dentry_open after call to open_namei that checks permissions.
877 * Only nfsd_open call dentry_open directly without checking
878 * permissions and because of that this code below is safe.
880 if (oit.it_flags & (FMODE_WRITE | FMODE_READ))
881 oit.it_flags |= MDS_OPEN_OWNEROVERRIDE;
883 /* We do not want O_EXCL here, presumably we opened the file
884 * already? XXX - NFS implications? */
885 oit.it_flags &= ~O_EXCL;
887 /* bug20584, if "it_flags" contains O_CREAT, the file will be
888 * created if necessary, then "IT_CREAT" should be set to keep
889 * consistent with it */
890 if (oit.it_flags & O_CREAT)
891 oit.it_op |= IT_CREAT;
897 /* Let's see if we have file open on MDS already. */
898 if (it->it_flags & FMODE_WRITE) {
899 och_p = &lli->lli_mds_write_och;
900 och_usecount = &lli->lli_open_fd_write_count;
901 } else if (it->it_flags & FMODE_EXEC) {
902 och_p = &lli->lli_mds_exec_och;
903 och_usecount = &lli->lli_open_fd_exec_count;
905 och_p = &lli->lli_mds_read_och;
906 och_usecount = &lli->lli_open_fd_read_count;
909 mutex_lock(&lli->lli_och_mutex);
910 if (*och_p) { /* Open handle is present */
911 if (it_disposition(it, DISP_OPEN_OPEN)) {
912 /* Well, there's extra open request that we do not need,
913 * let's close it somehow. This will decref request. */
914 rc = it_open_error(DISP_OPEN_OPEN, it);
916 mutex_unlock(&lli->lli_och_mutex);
917 GOTO(out_openerr, rc);
920 ll_release_openhandle(file_dentry(file), it);
924 rc = ll_local_open(file, it, fd, NULL);
927 mutex_unlock(&lli->lli_och_mutex);
928 GOTO(out_openerr, rc);
931 LASSERT(*och_usecount == 0);
932 if (!it->it_disposition) {
933 struct dentry *dentry = file_dentry(file);
934 struct ll_sb_info *sbi = ll_i2sbi(inode);
935 int open_threshold = sbi->ll_oc_thrsh_count;
937 /* We cannot just request lock handle now, new ELC code
938 * means that one of other OPEN locks for this file
939 * could be cancelled, and since blocking ast handler
940 * would attempt to grab och_mutex as well, that would
941 * result in a deadlock
943 mutex_unlock(&lli->lli_och_mutex);
945 * Normally called under two situations:
946 * 1. fhandle / NFS export.
947 * 2. A race/condition on MDS resulting in no open
948 * handle to be returned from LOOKUP|OPEN request,
949 * for example if the target entry was a symlink.
951 * For NFSv3 we need to always cache the open lock
952 * for pre 5.5 Linux kernels.
954 * After reaching number of opens of this inode
955 * we always ask for an open lock on it to handle
956 * bad userspace actors that open and close files
957 * in a loop for absolutely no good reason
959 /* fhandle / NFS path. */
960 if (lli->lli_open_thrsh_count != UINT_MAX)
961 open_threshold = lli->lli_open_thrsh_count;
963 if (filename_is_volatile(dentry->d_name.name,
966 /* There really is nothing here, but this
967 * make this more readable I think.
968 * We do not want openlock for volatile
969 * files under any circumstances
971 } else if (open_threshold > 0) {
972 /* Take MDS_OPEN_LOCK with many opens */
973 if (lli->lli_open_fd_count >= open_threshold)
974 it->it_flags |= MDS_OPEN_LOCK;
976 /* If this is open after we just closed */
977 else if (ktime_before(ktime_get(),
978 ktime_add_ms(lli->lli_close_fd_time,
979 sbi->ll_oc_thrsh_ms)))
980 it->it_flags |= MDS_OPEN_LOCK;
984 * Always specify MDS_OPEN_BY_FID because we don't want
985 * to get file with different fid.
987 it->it_flags |= MDS_OPEN_BY_FID;
988 rc = ll_intent_file_open(dentry, NULL, 0, it);
990 GOTO(out_openerr, rc);
994 OBD_ALLOC(*och_p, sizeof(struct obd_client_handle));
996 GOTO(out_och_free, rc = -ENOMEM);
1000 /* md_intent_lock() didn't get a request ref if there was an
1001 * open error, so don't do cleanup on the request here
1003 /* XXX (green): Should not we bail out on any error here, not
1004 * just open error? */
1005 rc = it_open_error(DISP_OPEN_OPEN, it);
1007 GOTO(out_och_free, rc);
1009 LASSERTF(it_disposition(it, DISP_ENQ_OPEN_REF),
1010 "inode %p: disposition %x, status %d\n", inode,
1011 it_disposition(it, ~0), it->it_status);
1013 rc = ll_local_open(file, it, fd, *och_p);
1015 GOTO(out_och_free, rc);
1018 rc = pcc_file_open(inode, file);
1020 GOTO(out_och_free, rc);
1022 mutex_unlock(&lli->lli_och_mutex);
1026 /* Must do this outside lli_och_mutex lock to prevent deadlock where
1027 different kind of OPEN lock for this same inode gets cancelled
1028 by ldlm_cancel_lru */
1029 if (!S_ISREG(inode->i_mode))
1030 GOTO(out_och_free, rc);
1031 cl_lov_delay_create_clear(&file->f_flags);
1032 GOTO(out_och_free, rc);
1036 if (och_p && *och_p) {
1037 OBD_FREE(*och_p, sizeof(struct obd_client_handle));
1038 *och_p = NULL; /* OBD_FREE writes some magic there */
1041 mutex_unlock(&lli->lli_och_mutex);
1044 if (lli->lli_opendir_key == fd)
1045 ll_deauthorize_statahead(inode, fd);
1048 ll_file_data_put(fd);
1050 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN,
1051 ktime_us_delta(ktime_get(), kstart));
1055 if (it && it_disposition(it, DISP_ENQ_OPEN_REF)) {
1056 ptlrpc_req_finished(it->it_request);
1057 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
1063 static int ll_md_blocking_lease_ast(struct ldlm_lock *lock,
1064 struct ldlm_lock_desc *desc, void *data, int flag)
1067 struct lustre_handle lockh;
1071 case LDLM_CB_BLOCKING:
1072 ldlm_lock2handle(lock, &lockh);
1073 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
1075 CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
1079 case LDLM_CB_CANCELING:
1087 * When setting a lease on a file, we take ownership of the lli_mds_*_och
1088 * and save it as fd->fd_och so as to force client to reopen the file even
1089 * if it has an open lock in cache already.
1091 static int ll_lease_och_acquire(struct inode *inode, struct file *file,
1092 struct lustre_handle *old_open_handle)
1094 struct ll_inode_info *lli = ll_i2info(inode);
1095 struct ll_file_data *fd = file->private_data;
1096 struct obd_client_handle **och_p;
1097 __u64 *och_usecount;
1101 /* Get the openhandle of the file */
1102 mutex_lock(&lli->lli_och_mutex);
1103 if (fd->fd_lease_och != NULL)
1104 GOTO(out_unlock, rc = -EBUSY);
1106 if (fd->fd_och == NULL) {
1107 if (file->f_mode & FMODE_WRITE) {
1108 LASSERT(lli->lli_mds_write_och != NULL);
1109 och_p = &lli->lli_mds_write_och;
1110 och_usecount = &lli->lli_open_fd_write_count;
1112 LASSERT(lli->lli_mds_read_och != NULL);
1113 och_p = &lli->lli_mds_read_och;
1114 och_usecount = &lli->lli_open_fd_read_count;
1117 if (*och_usecount > 1)
1118 GOTO(out_unlock, rc = -EBUSY);
1120 fd->fd_och = *och_p;
1125 *old_open_handle = fd->fd_och->och_open_handle;
1129 mutex_unlock(&lli->lli_och_mutex);
1134 * Release ownership on lli_mds_*_och when putting back a file lease.
1136 static int ll_lease_och_release(struct inode *inode, struct file *file)
1138 struct ll_inode_info *lli = ll_i2info(inode);
1139 struct ll_file_data *fd = file->private_data;
1140 struct obd_client_handle **och_p;
1141 struct obd_client_handle *old_och = NULL;
1142 __u64 *och_usecount;
1146 mutex_lock(&lli->lli_och_mutex);
1147 if (file->f_mode & FMODE_WRITE) {
1148 och_p = &lli->lli_mds_write_och;
1149 och_usecount = &lli->lli_open_fd_write_count;
1151 och_p = &lli->lli_mds_read_och;
1152 och_usecount = &lli->lli_open_fd_read_count;
1155 /* The file may have been open by another process (broken lease) so
1156 * *och_p is not NULL. In this case we should simply increase usecount
1159 if (*och_p != NULL) {
1160 old_och = fd->fd_och;
1163 *och_p = fd->fd_och;
1167 mutex_unlock(&lli->lli_och_mutex);
1169 if (old_och != NULL)
1170 rc = ll_close_inode_openhandle(inode, old_och, 0, NULL);
1176 * Acquire a lease and open the file.
1178 static struct obd_client_handle *
1179 ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
1182 struct lookup_intent it = { .it_op = IT_OPEN };
1183 struct ll_sb_info *sbi = ll_i2sbi(inode);
1184 struct md_op_data *op_data;
1185 struct ptlrpc_request *req = NULL;
1186 struct lustre_handle old_open_handle = { 0 };
1187 struct obd_client_handle *och = NULL;
1192 if (fmode != FMODE_WRITE && fmode != FMODE_READ)
1193 RETURN(ERR_PTR(-EINVAL));
1196 if (!(fmode & file->f_mode) || (file->f_mode & FMODE_EXEC))
1197 RETURN(ERR_PTR(-EPERM));
1199 rc = ll_lease_och_acquire(inode, file, &old_open_handle);
1201 RETURN(ERR_PTR(rc));
1206 RETURN(ERR_PTR(-ENOMEM));
1208 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
1209 LUSTRE_OPC_ANY, NULL);
1210 if (IS_ERR(op_data))
1211 GOTO(out, rc = PTR_ERR(op_data));
1213 /* To tell the MDT this openhandle is from the same owner */
1214 op_data->op_open_handle = old_open_handle;
1216 it.it_flags = fmode | open_flags;
1217 it.it_flags |= MDS_OPEN_LOCK | MDS_OPEN_BY_FID | MDS_OPEN_LEASE;
1218 rc = md_intent_lock(sbi->ll_md_exp, op_data, &it, &req,
1219 &ll_md_blocking_lease_ast,
1220 /* LDLM_FL_NO_LRU: To not put the lease lock into LRU list, otherwise
1221 * it can be cancelled which may mislead applications that the lease is
1223 * LDLM_FL_EXCL: Set this flag so that it won't be matched by normal
1224 * open in ll_md_blocking_ast(). Otherwise as ll_md_blocking_lease_ast
1225 * doesn't deal with openhandle, so normal openhandle will be leaked. */
1226 LDLM_FL_NO_LRU | LDLM_FL_EXCL);
1227 ll_finish_md_op_data(op_data);
1228 ptlrpc_req_finished(req);
1230 GOTO(out_release_it, rc);
1232 if (it_disposition(&it, DISP_LOOKUP_NEG))
1233 GOTO(out_release_it, rc = -ENOENT);
1235 rc = it_open_error(DISP_OPEN_OPEN, &it);
1237 GOTO(out_release_it, rc);
1239 LASSERT(it_disposition(&it, DISP_ENQ_OPEN_REF));
1240 rc = ll_och_fill(sbi->ll_md_exp, &it, och);
1242 GOTO(out_release_it, rc);
1244 if (!it_disposition(&it, DISP_OPEN_LEASE)) /* old server? */
1245 GOTO(out_close, rc = -EOPNOTSUPP);
1247 /* already get lease, handle lease lock */
1248 ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL);
1249 if (!it.it_lock_mode ||
1250 !(it.it_lock_bits & MDS_INODELOCK_OPEN)) {
1251 /* open lock must return for lease */
1252 CERROR(DFID "lease granted but no open lock, %d/%llu.\n",
1253 PFID(ll_inode2fid(inode)), it.it_lock_mode,
1255 GOTO(out_close, rc = -EPROTO);
1258 ll_intent_release(&it);
1262 /* Cancel open lock */
1263 if (it.it_lock_mode != 0) {
1264 ldlm_lock_decref_and_cancel(&och->och_lease_handle,
1266 it.it_lock_mode = 0;
1267 och->och_lease_handle.cookie = 0ULL;
1269 rc2 = ll_close_inode_openhandle(inode, och, 0, NULL);
1271 CERROR("%s: error closing file "DFID": %d\n",
1272 sbi->ll_fsname, PFID(&ll_i2info(inode)->lli_fid), rc2);
1273 och = NULL; /* och has been freed in ll_close_inode_openhandle() */
1275 ll_intent_release(&it);
1279 RETURN(ERR_PTR(rc));
1283 * Check whether a layout swap can be done between two inodes.
1285 * \param[in] inode1 First inode to check
1286 * \param[in] inode2 Second inode to check
1288 * \retval 0 on success, layout swap can be performed between both inodes
1289 * \retval negative error code if requirements are not met
1291 static int ll_check_swap_layouts_validity(struct inode *inode1,
1292 struct inode *inode2)
1294 if (!S_ISREG(inode1->i_mode) || !S_ISREG(inode2->i_mode))
1297 if (inode_permission(&init_user_ns, inode1, MAY_WRITE) ||
1298 inode_permission(&init_user_ns, inode2, MAY_WRITE))
1301 if (inode1->i_sb != inode2->i_sb)
1307 static int ll_swap_layouts_close(struct obd_client_handle *och,
1308 struct inode *inode, struct inode *inode2)
1310 const struct lu_fid *fid1 = ll_inode2fid(inode);
1311 const struct lu_fid *fid2;
1315 CDEBUG(D_INODE, "%s: biased close of file "DFID"\n",
1316 ll_i2sbi(inode)->ll_fsname, PFID(fid1));
1318 rc = ll_check_swap_layouts_validity(inode, inode2);
1320 GOTO(out_free_och, rc);
1322 /* We now know that inode2 is a lustre inode */
1323 fid2 = ll_inode2fid(inode2);
1325 rc = lu_fid_cmp(fid1, fid2);
1327 GOTO(out_free_och, rc = -EINVAL);
1329 /* Close the file and {swap,merge} layouts between inode & inode2.
1330 * NB: local lease handle is released in mdc_close_intent_pack()
1331 * because we still need it to pack l_remote_handle to MDT. */
1332 rc = ll_close_inode_openhandle(inode, och, MDS_CLOSE_LAYOUT_SWAP,
1335 och = NULL; /* freed in ll_close_inode_openhandle() */
1345 * Release lease and close the file.
1346 * It will check if the lease has ever broken.
1348 static int ll_lease_close_intent(struct obd_client_handle *och,
1349 struct inode *inode,
1350 bool *lease_broken, enum mds_op_bias bias,
1353 struct ldlm_lock *lock;
1354 bool cancelled = true;
1358 lock = ldlm_handle2lock(&och->och_lease_handle);
1360 lock_res_and_lock(lock);
1361 cancelled = ldlm_is_cancel(lock);
1362 unlock_res_and_lock(lock);
1363 LDLM_LOCK_PUT(lock);
1366 CDEBUG(D_INODE, "lease for "DFID" broken? %d, bias: %x\n",
1367 PFID(&ll_i2info(inode)->lli_fid), cancelled, bias);
1369 if (lease_broken != NULL)
1370 *lease_broken = cancelled;
1372 if (!cancelled && !bias)
1373 ldlm_cli_cancel(&och->och_lease_handle, 0);
1375 if (cancelled) { /* no need to excute intent */
1380 rc = ll_close_inode_openhandle(inode, och, bias, data);
1384 static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
1387 return ll_lease_close_intent(och, inode, lease_broken, 0, NULL);
1391 * After lease is taken, send the RPC MDS_REINT_RESYNC to the MDT
1393 static int ll_lease_file_resync(struct obd_client_handle *och,
1394 struct inode *inode, void __user *uarg)
1396 struct ll_sb_info *sbi = ll_i2sbi(inode);
1397 struct md_op_data *op_data;
1398 struct ll_ioc_lease_id ioc;
1399 __u64 data_version_unused;
1403 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1404 LUSTRE_OPC_ANY, NULL);
1405 if (IS_ERR(op_data))
1406 RETURN(PTR_ERR(op_data));
1408 if (copy_from_user(&ioc, uarg, sizeof(ioc)))
1411 /* before starting file resync, it's necessary to clean up page cache
1412 * in client memory, otherwise once the layout version is increased,
1413 * writing back cached data will be denied the OSTs. */
1414 rc = ll_data_version(inode, &data_version_unused, LL_DV_WR_FLUSH);
1418 op_data->op_lease_handle = och->och_lease_handle;
1419 op_data->op_mirror_id = ioc.lil_mirror_id;
1420 rc = md_file_resync(sbi->ll_md_exp, op_data);
1426 ll_finish_md_op_data(op_data);
1430 static int ll_merge_attr_nolock(const struct lu_env *env, struct inode *inode)
1432 struct ll_inode_info *lli = ll_i2info(inode);
1433 struct cl_object *obj = lli->lli_clob;
1434 struct cl_attr *attr = vvp_env_thread_attr(env);
1442 /* Merge timestamps the most recently obtained from MDS with
1443 * timestamps obtained from OSTs.
1445 * Do not overwrite atime of inode because it may be refreshed
1446 * by file_accessed() function. If the read was served by cache
1447 * data, there is no RPC to be sent so that atime may not be
1448 * transferred to OSTs at all. MDT only updates atime at close time
1449 * if it's at least 'mdd.*.atime_diff' older.
1450 * All in all, the atime in Lustre does not strictly comply with
1451 * POSIX. Solving this problem needs to send an RPC to MDT for each
1452 * read, this will hurt performance.
1454 if (test_and_clear_bit(LLIF_UPDATE_ATIME, &lli->lli_flags) ||
1455 inode->i_atime.tv_sec < lli->lli_atime)
1456 inode->i_atime.tv_sec = lli->lli_atime;
1458 inode->i_mtime.tv_sec = lli->lli_mtime;
1459 inode->i_ctime.tv_sec = lli->lli_ctime;
1461 mtime = inode->i_mtime.tv_sec;
1462 atime = inode->i_atime.tv_sec;
1463 ctime = inode->i_ctime.tv_sec;
1465 cl_object_attr_lock(obj);
1466 if (CFS_FAIL_CHECK(OBD_FAIL_MDC_MERGE))
1469 rc = cl_object_attr_get(env, obj, attr);
1470 cl_object_attr_unlock(obj);
1473 GOTO(out, rc = (rc == -ENODATA ? 0 : rc));
1475 if (atime < attr->cat_atime)
1476 atime = attr->cat_atime;
1478 if (ctime < attr->cat_ctime)
1479 ctime = attr->cat_ctime;
1481 if (mtime < attr->cat_mtime)
1482 mtime = attr->cat_mtime;
1484 CDEBUG(D_VFSTRACE, DFID" updating i_size %llu i_blocks %llu\n",
1485 PFID(&lli->lli_fid), attr->cat_size, attr->cat_blocks);
1487 if (llcrypt_require_key(inode) == -ENOKEY) {
1488 /* Without the key, round up encrypted file size to next
1489 * LUSTRE_ENCRYPTION_UNIT_SIZE. Clear text size is put in
1490 * lli_lazysize for proper file size setting at close time.
1492 lli->lli_attr_valid |= OBD_MD_FLLAZYSIZE;
1493 lli->lli_lazysize = attr->cat_size;
1494 attr->cat_size = round_up(attr->cat_size,
1495 LUSTRE_ENCRYPTION_UNIT_SIZE);
1497 i_size_write(inode, attr->cat_size);
1498 inode->i_blocks = attr->cat_blocks;
1500 inode->i_mtime.tv_sec = mtime;
1501 inode->i_atime.tv_sec = atime;
1502 inode->i_ctime.tv_sec = ctime;
1509 int ll_merge_attr(const struct lu_env *env, struct inode *inode)
1513 ll_inode_size_lock(inode);
1514 rc = ll_merge_attr_nolock(env, inode);
1515 ll_inode_size_unlock(inode);
1520 /* Use to update size and blocks on inode for LSOM if there is no contention */
1521 int ll_merge_attr_try(const struct lu_env *env, struct inode *inode)
1525 if (ll_inode_size_trylock(inode)) {
1526 rc = ll_merge_attr_nolock(env, inode);
1527 ll_inode_size_unlock(inode);
1534 * Set designated mirror for I/O.
1536 * So far only read, write, and truncated can support to issue I/O to
1537 * designated mirror.
1539 void ll_io_set_mirror(struct cl_io *io, const struct file *file)
1541 struct ll_file_data *fd = file->private_data;
1543 /* clear layout version for generic(non-resync) I/O in case it carries
1544 * stale layout version due to I/O restart */
1545 io->ci_layout_version = 0;
1547 /* FLR: disable non-delay for designated mirror I/O because obviously
1548 * only one mirror is available */
1549 if (fd->fd_designated_mirror > 0) {
1551 io->ci_designated_mirror = fd->fd_designated_mirror;
1552 io->ci_layout_version = fd->fd_layout_version;
1555 CDEBUG(D_VFSTRACE, "%s: desiginated mirror: %d\n",
1556 file->f_path.dentry->d_name.name, io->ci_designated_mirror);
1560 * This is relatime_need_update() from Linux 5.17, which is not exported.
1562 static int relatime_need_update(struct vfsmount *mnt, struct inode *inode,
1563 struct timespec64 now)
1566 if (!(mnt->mnt_flags & MNT_RELATIME))
1569 * Is mtime younger than atime? If yes, update atime:
1571 if (timespec64_compare(&inode->i_mtime, &inode->i_atime) >= 0)
1574 * Is ctime younger than atime? If yes, update atime:
1576 if (timespec64_compare(&inode->i_ctime, &inode->i_atime) >= 0)
1580 * Is the previous atime value older than a day? If yes,
1583 if ((long)(now.tv_sec - inode->i_atime.tv_sec) >= 24*60*60)
1586 * Good, we can skip the atime update:
1592 * Very similar to kernel function: !__atime_needs_update()
1594 static bool file_is_noatime(const struct file *file)
1596 struct vfsmount *mnt = file->f_path.mnt;
1597 struct inode *inode = file_inode((struct file *)file);
1598 struct timespec64 now;
1600 if (file->f_flags & O_NOATIME)
1603 if (inode->i_flags & S_NOATIME)
1606 if (IS_NOATIME(inode))
1609 if (mnt->mnt_flags & (MNT_NOATIME | MNT_READONLY))
1612 if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
1615 if ((inode->i_sb->s_flags & SB_NODIRATIME) && S_ISDIR(inode->i_mode))
1618 now = current_time(inode);
1620 if (!relatime_need_update(mnt, inode, now))
1626 void ll_io_init(struct cl_io *io, struct file *file, enum cl_io_type iot,
1627 struct vvp_io_args *args)
1629 struct inode *inode = file_inode(file);
1630 struct ll_file_data *fd = file->private_data;
1632 io->u.ci_rw.crw_nonblock = file->f_flags & O_NONBLOCK;
1633 io->ci_lock_no_expand = fd->ll_lock_no_expand;
1635 if (iot == CIT_WRITE) {
1636 io->u.ci_wr.wr_append = !!(file->f_flags & O_APPEND);
1637 io->u.ci_wr.wr_sync = !!(file->f_flags & O_SYNC ||
1638 file->f_flags & O_DIRECT ||
1640 #ifdef HAVE_GENERIC_WRITE_SYNC_2ARGS
1641 io->u.ci_wr.wr_sync |= !!(args &&
1642 (args->u.normal.via_iocb->ki_flags &
1648 io->ci_iocb_nowait = !!(args &&
1649 (args->u.normal.via_iocb->ki_flags &
1653 io->ci_obj = ll_i2info(inode)->lli_clob;
1654 io->ci_lockreq = CILR_MAYBE;
1655 if (ll_file_nolock(file)) {
1656 io->ci_lockreq = CILR_NEVER;
1657 io->ci_no_srvlock = 1;
1658 } else if (file->f_flags & O_APPEND) {
1659 io->ci_lockreq = CILR_MANDATORY;
1661 io->ci_noatime = file_is_noatime(file);
1662 io->ci_async_readahead = false;
1664 /* FLR: only use non-delay I/O for read as there is only one
1665 * avaliable mirror for write. */
1666 io->ci_ndelay = !(iot == CIT_WRITE);
1668 ll_io_set_mirror(io, file);
1671 static void ll_heat_add(struct inode *inode, enum cl_io_type iot,
1674 struct ll_inode_info *lli = ll_i2info(inode);
1675 struct ll_sb_info *sbi = ll_i2sbi(inode);
1676 enum obd_heat_type sample_type;
1677 enum obd_heat_type iobyte_type;
1678 __u64 now = ktime_get_real_seconds();
1680 if (!ll_sbi_has_file_heat(sbi) ||
1681 lli->lli_heat_flags & LU_HEAT_FLAG_OFF)
1684 if (iot == CIT_READ) {
1685 sample_type = OBD_HEAT_READSAMPLE;
1686 iobyte_type = OBD_HEAT_READBYTE;
1687 } else if (iot == CIT_WRITE) {
1688 sample_type = OBD_HEAT_WRITESAMPLE;
1689 iobyte_type = OBD_HEAT_WRITEBYTE;
1694 spin_lock(&lli->lli_heat_lock);
1695 obd_heat_add(&lli->lli_heat_instances[sample_type], now, 1,
1696 sbi->ll_heat_decay_weight, sbi->ll_heat_period_second);
1697 obd_heat_add(&lli->lli_heat_instances[iobyte_type], now, count,
1698 sbi->ll_heat_decay_weight, sbi->ll_heat_period_second);
1699 spin_unlock(&lli->lli_heat_lock);
1703 ll_file_io_generic(const struct lu_env *env, struct vvp_io_args *args,
1704 struct file *file, enum cl_io_type iot,
1705 loff_t *ppos, size_t count)
1707 struct vvp_io *vio = vvp_env_io(env);
1708 struct inode *inode = file_inode(file);
1709 struct ll_inode_info *lli = ll_i2info(inode);
1710 struct ll_sb_info *sbi = ll_i2sbi(inode);
1711 struct ll_file_data *fd = file->private_data;
1712 struct range_lock range;
1713 bool range_locked = false;
1719 unsigned int retried = 0, dio_lock = 0;
1720 bool is_aio = false;
1721 bool is_parallel_dio = false;
1722 struct cl_dio_aio *ci_dio_aio = NULL;
1724 bool partial_io = false;
1725 size_t max_io_pages, max_cached_pages;
1729 CDEBUG(D_VFSTRACE, "%s: %s ppos: %llu, count: %zu\n",
1730 file_dentry(file)->d_name.name,
1731 iot == CIT_READ ? "read" : "write", *ppos, count);
1733 max_io_pages = PTLRPC_MAX_BRW_PAGES * OBD_MAX_RIF_DEFAULT;
1734 max_cached_pages = sbi->ll_cache->ccc_lru_max;
1735 if (max_io_pages > (max_cached_pages >> 2))
1736 max_io_pages = max_cached_pages >> 2;
1738 io = vvp_env_thread_io(env);
1739 if (file->f_flags & O_DIRECT) {
1740 if (file->f_flags & O_APPEND)
1742 if (!is_sync_kiocb(args->u.normal.via_iocb))
1745 /* the kernel does not support AIO on pipes, and parallel DIO
1746 * uses part of the AIO path, so we must not do parallel dio
1749 is_parallel_dio = !iov_iter_is_pipe(args->u.normal.via_iter) &&
1752 if (!ll_sbi_has_parallel_dio(sbi))
1753 is_parallel_dio = false;
1755 ci_dio_aio = cl_dio_aio_alloc(args->u.normal.via_iocb,
1756 ll_i2info(inode)->lli_clob, is_aio);
1758 GOTO(out, rc = -ENOMEM);
1763 * IO block size need be aware of cached page limit, otherwise
1764 * if we have small max_cached_mb but large block IO issued, io
1765 * could not be finished and blocked whole client.
1767 if (file->f_flags & O_DIRECT)
1770 per_bytes = min(max_io_pages << PAGE_SHIFT, count);
1771 partial_io = per_bytes < count;
1772 io = vvp_env_thread_io(env);
1773 ll_io_init(io, file, iot, args);
1774 io->ci_dio_aio = ci_dio_aio;
1775 io->ci_dio_lock = dio_lock;
1776 io->ci_ndelay_tried = retried;
1777 io->ci_parallel_dio = is_parallel_dio;
1779 if (cl_io_rw_init(env, io, iot, *ppos, per_bytes) == 0) {
1780 if (file->f_flags & O_APPEND)
1781 range_lock_init(&range, 0, LUSTRE_EOF);
1783 range_lock_init(&range, *ppos, *ppos + per_bytes - 1);
1785 vio->vui_fd = file->private_data;
1786 vio->vui_iter = args->u.normal.via_iter;
1787 vio->vui_iocb = args->u.normal.via_iocb;
1788 /* Direct IO reads must also take range lock,
1789 * or multiple reads will try to work on the same pages
1790 * See LU-6227 for details.
1792 if (((iot == CIT_WRITE) ||
1793 (iot == CIT_READ && (file->f_flags & O_DIRECT))) &&
1794 !(vio->vui_fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
1795 CDEBUG(D_VFSTRACE, "Range lock "RL_FMT"\n",
1797 rc = range_lock(&lli->lli_write_tree, &range);
1801 range_locked = true;
1804 ll_cl_add(inode, env, io, LCC_RW);
1805 rc = cl_io_loop(env, io);
1806 ll_cl_remove(inode, env);
1808 /* cl_io_rw_init() handled IO */
1812 if (io->ci_dio_aio && !is_aio) {
1813 struct cl_sync_io *anchor = &io->ci_dio_aio->cda_sync;
1815 /* for dio, EIOCBQUEUED is an implementation detail,
1816 * and we don't return it to userspace
1818 if (rc == -EIOCBQUEUED)
1821 /* N/B: parallel DIO may be disabled during i/o submission;
1822 * if that occurs, I/O shifts to sync, so it's all resolved
1823 * before we get here, and this wait call completes
1826 rc2 = cl_sync_io_wait_recycle(env, anchor, 0, 0);
1832 CDEBUG(D_VFSTRACE, "Range unlock "RL_FMT"\n",
1834 range_unlock(&lli->lli_write_tree, &range);
1835 range_locked = false;
1838 if (io->ci_nob > 0) {
1840 result += io->ci_nob;
1841 *ppos = io->u.ci_wr.wr.crw_pos; /* for splice */
1845 count -= io->ci_nob;
1847 /* prepare IO restart */
1849 args->u.normal.via_iter = vio->vui_iter;
1853 * Reexpand iov count because it was zero
1856 iov_iter_reexpand(vio->vui_iter, count);
1857 if (per_bytes == io->ci_nob)
1858 io->ci_need_restart = 1;
1862 cl_io_fini(env, io);
1865 "%s: %d io complete with rc: %d, result: %zd, restart: %d\n",
1866 file->f_path.dentry->d_name.name,
1867 iot, rc, result, io->ci_need_restart);
1869 if ((!rc || rc == -ENODATA || rc == -ENOLCK || rc == -EIOCBQUEUED) &&
1870 count > 0 && io->ci_need_restart && retries-- > 0) {
1872 "%s: restart %s from ppos=%lld count=%zu retries=%u ret=%zd: rc = %d\n",
1873 file_dentry(file)->d_name.name,
1874 iot == CIT_READ ? "read" : "write",
1875 *ppos, count, retries, result, rc);
1876 /* preserve the tried count for FLR */
1877 retried = io->ci_ndelay_tried;
1878 dio_lock = io->ci_dio_lock;
1882 if (io->ci_dio_aio) {
1883 /* set the number of bytes successfully moved in the aio */
1885 io->ci_dio_aio->cda_bytes = result;
1887 * VFS will call aio_complete() if no -EIOCBQUEUED
1888 * is returned for AIO, so we can not call aio_complete()
1889 * in our end_io(). (cda_no_aio_complete is always set for
1892 * NB: Setting cda_no_aio_complete like this is safe because
1893 * the atomic_dec_and_lock in cl_sync_io_note has implicit
1894 * memory barriers, so this will be seen by whichever thread
1895 * completes the DIO/AIO, even if it's not this one.
1897 if (is_aio && rc != -EIOCBQUEUED)
1898 io->ci_dio_aio->cda_no_aio_complete = 1;
1899 /* if an aio enqueued successfully (-EIOCBQUEUED), then Lustre
1900 * will call aio_complete rather than the vfs, so we return 0
1901 * to tell the VFS we're handling it
1903 else if (is_aio) /* rc == -EIOCBQUEUED */
1906 * Drop the reference held by the llite layer on this top level
1909 * For DIO, this frees it here, since IO is complete, and for
1910 * AIO, we will call aio_complete() (and then free this top
1911 * level context) once all the outstanding chunks of this AIO
1914 cl_sync_io_note(env, &io->ci_dio_aio->cda_sync,
1915 rc == -EIOCBQUEUED ? 0 : rc);
1917 LASSERT(io->ci_dio_aio->cda_creator_free);
1918 cl_dio_aio_free(env, io->ci_dio_aio);
1919 io->ci_dio_aio = NULL;
1923 if (iot == CIT_READ) {
1925 ll_stats_ops_tally(ll_i2sbi(inode),
1926 LPROC_LL_READ_BYTES, result);
1927 } else if (iot == CIT_WRITE) {
1929 ll_stats_ops_tally(ll_i2sbi(inode),
1930 LPROC_LL_WRITE_BYTES, result);
1931 fd->fd_write_failed = false;
1932 } else if (result == 0 && rc == 0) {
1935 fd->fd_write_failed = true;
1937 fd->fd_write_failed = false;
1938 } else if (rc != -ERESTARTSYS) {
1939 fd->fd_write_failed = true;
1943 CDEBUG(D_VFSTRACE, "iot: %d, result: %zd\n", iot, result);
1945 ll_heat_add(inode, iot, result);
1947 RETURN(result > 0 ? result : rc);
1951 * The purpose of fast read is to overcome per I/O overhead and improve IOPS
1952 * especially for small I/O.
1954 * To serve a read request, CLIO has to create and initialize a cl_io and
1955 * then request DLM lock. This has turned out to have siginificant overhead
1956 * and affects the performance of small I/O dramatically.
1958 * It's not necessary to create a cl_io for each I/O. Under the help of read
1959 * ahead, most of the pages being read are already in memory cache and we can
1960 * read those pages directly because if the pages exist, the corresponding DLM
1961 * lock must exist so that page content must be valid.
1963 * In fast read implementation, the llite speculatively finds and reads pages
1964 * in memory cache. There are three scenarios for fast read:
1965 * - If the page exists and is uptodate, kernel VM will provide the data and
1966 * CLIO won't be intervened;
1967 * - If the page was brought into memory by read ahead, it will be exported
1968 * and read ahead parameters will be updated;
1969 * - Otherwise the page is not in memory, we can't do fast read. Therefore,
1970 * it will go back and invoke normal read, i.e., a cl_io will be created
1971 * and DLM lock will be requested.
1973 * POSIX compliance: posix standard states that read is intended to be atomic.
1974 * Lustre read implementation is in line with Linux kernel read implementation
1975 * and neither of them complies with POSIX standard in this matter. Fast read
1976 * doesn't make the situation worse on single node but it may interleave write
1977 * results from multiple nodes due to short read handling in ll_file_aio_read().
1979 * \param env - lu_env
1980 * \param iocb - kiocb from kernel
1981 * \param iter - user space buffers where the data will be copied
1983 * \retval - number of bytes have been read, or error code if error occurred.
1986 ll_do_fast_read(struct kiocb *iocb, struct iov_iter *iter)
1990 if (!ll_sbi_has_fast_read(ll_i2sbi(file_inode(iocb->ki_filp))))
1993 /* NB: we can't do direct IO for fast read because it will need a lock
1994 * to make IO engine happy. */
1995 if (iocb->ki_filp->f_flags & O_DIRECT)
1998 result = generic_file_read_iter(iocb, iter);
2000 /* If the first page is not in cache, generic_file_aio_read() will be
2001 * returned with -ENODATA. Fall back to full read path.
2002 * See corresponding code in ll_readpage().
2004 * if we raced with page deletion, we might get EIO. Rather than add
2005 * locking to the fast path for this rare case, fall back to the full
2006 * read path. (See vvp_io_read_start() for rest of handling.
2008 if (result == -ENODATA || result == -EIO)
2012 ll_heat_add(file_inode(iocb->ki_filp), CIT_READ, result);
2013 ll_stats_ops_tally(ll_i2sbi(file_inode(iocb->ki_filp)),
2014 LPROC_LL_READ_BYTES, result);
2021 * Confine read iter lest read beyond the EOF
2023 * \param iocb [in] kernel iocb
2024 * \param to [in] reader iov_iter
2026 * \retval <0 failure
2028 * \retval >0 @iocb->ki_pos has passed the EOF
2030 static int file_read_confine_iter(struct lu_env *env, struct kiocb *iocb,
2031 struct iov_iter *to)
2033 struct cl_attr *attr = vvp_env_thread_attr(env);
2034 struct file *file = iocb->ki_filp;
2035 struct inode *inode = file_inode(file);
2036 struct ll_inode_info *lli = ll_i2info(inode);
2037 loff_t read_end = iocb->ki_pos + iov_iter_count(to);
2042 cl_object_attr_lock(lli->lli_clob);
2043 rc = cl_object_attr_get(env, lli->lli_clob, attr);
2044 cl_object_attr_unlock(lli->lli_clob);
2048 kms = attr->cat_kms;
2049 /* if read beyond end-of-file, adjust read count */
2050 if (kms > 0 && (iocb->ki_pos >= kms || read_end > kms)) {
2051 rc = ll_glimpse_size(inode);
2055 size = i_size_read(inode);
2056 if (iocb->ki_pos >= size || read_end > size) {
2058 "%s: read [%llu, %llu] over eof, kms %llu, file_size %llu.\n",
2059 file_dentry(file)->d_name.name,
2060 iocb->ki_pos, read_end, kms, size);
2062 if (iocb->ki_pos >= size)
2065 if (read_end > size)
2066 iov_iter_truncate(to, size - iocb->ki_pos);
2074 * Read from a file (through the page cache).
2076 static ssize_t ll_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
2079 struct vvp_io_args *args;
2080 struct file *file = iocb->ki_filp;
2084 ktime_t kstart = ktime_get();
2086 bool stale_data = false;
2090 CDEBUG(D_VFSTRACE|D_IOTRACE, "file %s:"DFID", ppos: %lld, count: %zu\n",
2091 file_dentry(file)->d_name.name,
2092 PFID(ll_inode2fid(file_inode(file))), iocb->ki_pos,
2093 iov_iter_count(to));
2095 if (!iov_iter_count(to))
2098 env = cl_env_get(&refcheck);
2100 RETURN(PTR_ERR(env));
2102 result = file_read_confine_iter(env, iocb, to);
2105 else if (result > 0)
2109 * Currently when PCC read failed, we do not fall back to the
2110 * normal read path, just return the error.
2111 * The resaon is that: for RW-PCC, the file data may be modified
2112 * in the PCC and inconsistent with the data on OSTs (or file
2113 * data has been removed from the Lustre file system), at this
2114 * time, fallback to the normal read path may read the wrong
2116 * TODO: for RO-PCC (readonly PCC), fall back to normal read
2117 * path: read data from data copy on OSTs.
2119 result = pcc_file_read_iter(iocb, to, &cached);
2123 ll_ras_enter(file, iocb->ki_pos, iov_iter_count(to));
2125 result = ll_do_fast_read(iocb, to);
2126 if (result < 0 || iov_iter_count(to) == 0)
2129 args = ll_env_args(env);
2130 args->u.normal.via_iter = to;
2131 args->u.normal.via_iocb = iocb;
2133 rc2 = ll_file_io_generic(env, args, file, CIT_READ,
2134 &iocb->ki_pos, iov_iter_count(to));
2137 else if (result == 0)
2141 cl_env_put(env, &refcheck);
2143 if (stale_data && result > 0) {
2145 * we've reached EOF before the read, the data read are cached
2148 iov_iter_truncate(to, 0);
2153 ll_rw_stats_tally(ll_i2sbi(file_inode(file)), current->pid,
2154 file->private_data, iocb->ki_pos, result,
2156 ll_stats_ops_tally(ll_i2sbi(file_inode(file)), LPROC_LL_READ,
2157 ktime_us_delta(ktime_get(), kstart));
2161 "COMPLETED: file %s:"DFID", ppos: %lld, count: %zu\n",
2162 file_dentry(file)->d_name.name,
2163 PFID(ll_inode2fid(file_inode(file))), iocb->ki_pos,
2164 iov_iter_count(to));
2170 * Similar trick to ll_do_fast_read, this improves write speed for tiny writes.
2171 * If a page is already in the page cache and dirty (and some other things -
2172 * See ll_tiny_write_begin for the instantiation of these rules), then we can
2173 * write to it without doing a full I/O, because Lustre already knows about it
2174 * and will write it out. This saves a lot of processing time.
2176 * All writes here are within one page, so exclusion is handled by the page
2177 * lock on the vm page. We do not do tiny writes for writes which touch
2178 * multiple pages because it's very unlikely multiple sequential pages are
2179 * are already dirty.
2181 * We limit these to < PAGE_SIZE because PAGE_SIZE writes are relatively common
2182 * and are unlikely to be to already dirty pages.
2184 * Attribute updates are important here, we do them in ll_tiny_write_end.
2186 static ssize_t ll_do_tiny_write(struct kiocb *iocb, struct iov_iter *iter)
2188 ssize_t count = iov_iter_count(iter);
2189 struct file *file = iocb->ki_filp;
2190 struct inode *inode = file_inode(file);
2191 bool lock_inode = !IS_NOSEC(inode);
2196 /* Restrict writes to single page and < PAGE_SIZE. See comment at top
2197 * of function for why.
2199 if (count >= PAGE_SIZE ||
2200 (iocb->ki_pos & (PAGE_SIZE-1)) + count > PAGE_SIZE)
2203 if (unlikely(lock_inode))
2205 result = __generic_file_write_iter(iocb, iter);
2207 if (unlikely(lock_inode))
2208 inode_unlock(inode);
2210 /* If the page is not already dirty, ll_tiny_write_begin returns
2211 * -ENODATA. We continue on to normal write.
2213 if (result == -ENODATA)
2217 ll_heat_add(inode, CIT_WRITE, result);
2218 set_bit(LLIF_DATA_MODIFIED, &ll_i2info(inode)->lli_flags);
2221 CDEBUG(D_VFSTRACE, "result: %zu, original count %zu\n", result, count);
2227 * Write to a file (through the page cache).
2229 static ssize_t ll_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
2231 struct vvp_io_args *args;
2233 ssize_t rc_tiny = 0, rc_normal;
2234 struct file *file = iocb->ki_filp;
2237 ktime_t kstart = ktime_get();
2242 CDEBUG(D_VFSTRACE|D_IOTRACE, "file %s:"DFID", ppos: %lld, count: %zu\n",
2243 file_dentry(file)->d_name.name,
2244 PFID(ll_inode2fid(file_inode(file))), iocb->ki_pos,
2245 iov_iter_count(from));
2247 if (!iov_iter_count(from))
2248 GOTO(out, rc_normal = 0);
2251 * When PCC write failed, we usually do not fall back to the normal
2252 * write path, just return the error. But there is a special case when
2253 * returned error code is -ENOSPC due to running out of space on PCC HSM
2254 * bakcend. At this time, it will fall back to normal I/O path and
2255 * retry the I/O. As the file is in HSM released state, it will restore
2256 * the file data to OSTs first and redo the write again. And the
2257 * restore process will revoke the layout lock and detach the file
2258 * from PCC cache automatically.
2260 result = pcc_file_write_iter(iocb, from, &cached);
2261 if (cached && result != -ENOSPC && result != -EDQUOT)
2262 GOTO(out, rc_normal = result);
2264 /* NB: we can't do direct IO for tiny writes because they use the page
2265 * cache, we can't do sync writes because tiny writes can't flush
2266 * pages, and we can't do append writes because we can't guarantee the
2267 * required DLM locks are held to protect file size.
2269 if (ll_sbi_has_tiny_write(ll_i2sbi(file_inode(file))) &&
2270 !(file->f_flags & (O_DIRECT | O_SYNC | O_APPEND)))
2271 rc_tiny = ll_do_tiny_write(iocb, from);
2273 /* In case of error, go on and try normal write - Only stop if tiny
2274 * write completed I/O.
2276 if (iov_iter_count(from) == 0)
2277 GOTO(out, rc_normal = rc_tiny);
2279 env = cl_env_get(&refcheck);
2281 RETURN(PTR_ERR(env));
2283 args = ll_env_args(env);
2284 args->u.normal.via_iter = from;
2285 args->u.normal.via_iocb = iocb;
2287 rc_normal = ll_file_io_generic(env, args, file, CIT_WRITE,
2288 &iocb->ki_pos, iov_iter_count(from));
2290 /* On success, combine bytes written. */
2291 if (rc_tiny >= 0 && rc_normal > 0)
2292 rc_normal += rc_tiny;
2293 /* On error, only return error from normal write if tiny write did not
2294 * write any bytes. Otherwise return bytes written by tiny write.
2296 else if (rc_tiny > 0)
2297 rc_normal = rc_tiny;
2299 cl_env_put(env, &refcheck);
2301 if (rc_normal > 0) {
2302 ll_rw_stats_tally(ll_i2sbi(file_inode(file)), current->pid,
2303 file->private_data, iocb->ki_pos,
2305 ll_stats_ops_tally(ll_i2sbi(file_inode(file)), LPROC_LL_WRITE,
2306 ktime_us_delta(ktime_get(), kstart));
2310 "COMPLETED: file %s:"DFID", ppos: %lld, count: %zu\n",
2311 file_dentry(file)->d_name.name,
2312 PFID(ll_inode2fid(file_inode(file))), iocb->ki_pos,
2313 iov_iter_count(from));
2318 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
2320 * XXX: exact copy from kernel code (__generic_file_aio_write_nolock)
2322 static int ll_file_get_iov_count(const struct iovec *iov,
2323 unsigned long *nr_segs, size_t *count,
2329 for (seg = 0; seg < *nr_segs; seg++) {
2330 const struct iovec *iv = &iov[seg];
2333 * If any segment has a negative length, or the cumulative
2334 * length ever wraps negative then return -EINVAL.
2337 if (unlikely((ssize_t)(cnt|iv->iov_len) < 0))
2339 if (access_ok(access_flags, iv->iov_base, iv->iov_len))
2344 cnt -= iv->iov_len; /* This segment is no good */
2351 static ssize_t ll_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
2352 unsigned long nr_segs, loff_t pos)
2359 result = ll_file_get_iov_count(iov, &nr_segs, &iov_count, VERIFY_READ);
2366 # ifdef HAVE_IOV_ITER_INIT_DIRECTION
2367 iov_iter_init(&to, READ, iov, nr_segs, iov_count);
2368 # else /* !HAVE_IOV_ITER_INIT_DIRECTION */
2369 iov_iter_init(&to, iov, nr_segs, iov_count, 0);
2370 # endif /* HAVE_IOV_ITER_INIT_DIRECTION */
2372 result = ll_file_read_iter(iocb, &to);
2377 static ssize_t ll_file_read(struct file *file, char __user *buf, size_t count,
2380 struct iovec iov = { .iov_base = buf, .iov_len = count };
2389 init_sync_kiocb(&kiocb, file);
2390 kiocb.ki_pos = *ppos;
2391 #ifdef HAVE_KIOCB_KI_LEFT
2392 kiocb.ki_left = count;
2393 #elif defined(HAVE_KI_NBYTES)
2394 kiocb.i_nbytes = count;
2397 result = ll_file_aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
2398 *ppos = kiocb.ki_pos;
2404 * Write to a file (through the page cache).
2407 static ssize_t ll_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
2408 unsigned long nr_segs, loff_t pos)
2410 struct iov_iter from;
2415 result = ll_file_get_iov_count(iov, &nr_segs, &iov_count, VERIFY_WRITE);
2422 # ifdef HAVE_IOV_ITER_INIT_DIRECTION
2423 iov_iter_init(&from, WRITE, iov, nr_segs, iov_count);
2424 # else /* !HAVE_IOV_ITER_INIT_DIRECTION */
2425 iov_iter_init(&from, iov, nr_segs, iov_count, 0);
2426 # endif /* HAVE_IOV_ITER_INIT_DIRECTION */
2428 result = ll_file_write_iter(iocb, &from);
2433 static ssize_t ll_file_write(struct file *file, const char __user *buf,
2434 size_t count, loff_t *ppos)
2436 struct iovec iov = { .iov_base = (void __user *)buf,
2446 init_sync_kiocb(&kiocb, file);
2447 kiocb.ki_pos = *ppos;
2448 #ifdef HAVE_KIOCB_KI_LEFT
2449 kiocb.ki_left = count;
2450 #elif defined(HAVE_KI_NBYTES)
2451 kiocb.ki_nbytes = count;
2454 result = ll_file_aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
2455 *ppos = kiocb.ki_pos;
2459 #endif /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
2461 int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry,
2462 __u64 flags, struct lov_user_md *lum, int lum_size)
2464 struct lookup_intent oit = {
2466 .it_flags = flags | MDS_OPEN_BY_FID,
2471 if ((__swab32(lum->lmm_magic) & le32_to_cpu(LOV_MAGIC_MASK)) ==
2472 le32_to_cpu(LOV_MAGIC_MAGIC)) {
2473 /* this code will only exist for big-endian systems */
2474 lustre_swab_lov_user_md(lum, 0);
2477 ll_inode_size_lock(inode);
2478 rc = ll_intent_file_open(dentry, lum, lum_size, &oit);
2480 GOTO(out_unlock, rc);
2482 ll_release_openhandle(dentry, &oit);
2485 ll_inode_size_unlock(inode);
2486 ll_intent_release(&oit);
2491 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
2492 struct lov_mds_md **lmmp, int *lmm_size,
2493 struct ptlrpc_request **request)
2495 struct ll_sb_info *sbi = ll_i2sbi(inode);
2496 struct mdt_body *body;
2497 struct lov_mds_md *lmm = NULL;
2498 struct ptlrpc_request *req = NULL;
2499 struct md_op_data *op_data;
2504 rc = ll_get_default_mdsize(sbi, &lmmsize);
2508 op_data = ll_prep_md_op_data(NULL, inode, NULL, filename,
2509 strlen(filename), lmmsize,
2510 LUSTRE_OPC_ANY, NULL);
2511 if (IS_ERR(op_data))
2512 RETURN(PTR_ERR(op_data));
2514 op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
2515 rc = md_getattr_name(sbi->ll_md_exp, op_data, &req);
2516 ll_finish_md_op_data(op_data);
2518 CDEBUG(D_INFO, "md_getattr_name failed on %s: rc %d\n",
2523 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2524 LASSERT(body != NULL); /* checked by mdc_getattr_name */
2526 lmmsize = body->mbo_eadatasize;
2528 if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
2530 GOTO(out, rc = -ENODATA);
2532 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, lmmsize);
2533 LASSERT(lmm != NULL);
2535 if (lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V1) &&
2536 lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V3) &&
2537 lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_COMP_V1) &&
2538 lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_FOREIGN))
2539 GOTO(out, rc = -EPROTO);
2542 * This is coming from the MDS, so is probably in
2543 * little endian. We convert it to host endian before
2544 * passing it to userspace.
2546 if (cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) {
2547 int stripe_count = 0;
2549 if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V1) ||
2550 lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V3)) {
2551 stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
2552 if (le32_to_cpu(lmm->lmm_pattern) &
2553 LOV_PATTERN_F_RELEASED)
2555 lustre_swab_lov_user_md((struct lov_user_md *)lmm, 0);
2557 /* if function called for directory - we should
2558 * avoid swab not existent lsm objects
2560 if (lmm->lmm_magic == LOV_MAGIC_V1 &&
2561 S_ISREG(body->mbo_mode))
2562 lustre_swab_lov_user_md_objects(
2563 ((struct lov_user_md_v1 *)lmm)->lmm_objects,
2565 else if (lmm->lmm_magic == LOV_MAGIC_V3 &&
2566 S_ISREG(body->mbo_mode))
2567 lustre_swab_lov_user_md_objects(
2568 ((struct lov_user_md_v3 *)lmm)->lmm_objects,
2570 } else if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_COMP_V1)) {
2571 lustre_swab_lov_comp_md_v1(
2572 (struct lov_comp_md_v1 *)lmm);
2576 if (lmm->lmm_magic == LOV_MAGIC_COMP_V1) {
2577 struct lov_comp_md_v1 *comp_v1 = NULL;
2578 struct lov_comp_md_entry_v1 *ent;
2579 struct lov_user_md_v1 *v1;
2583 comp_v1 = (struct lov_comp_md_v1 *)lmm;
2584 /* Dump the striping information */
2585 for (; i < comp_v1->lcm_entry_count; i++) {
2586 ent = &comp_v1->lcm_entries[i];
2587 off = ent->lcme_offset;
2588 v1 = (struct lov_user_md_v1 *)((char *)lmm + off);
2590 "comp[%d]: stripe_count=%u, stripe_size=%u\n",
2591 i, v1->lmm_stripe_count, v1->lmm_stripe_size);
2595 * Return valid stripe_count and stripe_size instead of 0 for
2596 * DoM files to avoid divide-by-zero for older userspace that
2597 * calls this ioctl, e.g. lustre ADIO driver.
2599 if (lmm->lmm_stripe_count == 0)
2600 lmm->lmm_stripe_count = 1;
2601 if (lmm->lmm_stripe_size == 0) {
2602 /* Since the first component of the file data is placed
2603 * on the MDT for faster access, the stripe_size of the
2604 * second one is always that applications which are
2607 if (lmm->lmm_pattern == LOV_PATTERN_MDT)
2608 i = comp_v1->lcm_entry_count > 1 ? 1 : 0;
2610 i = comp_v1->lcm_entry_count > 1 ?
2611 comp_v1->lcm_entry_count - 1 : 0;
2612 ent = &comp_v1->lcm_entries[i];
2613 off = ent->lcme_offset;
2614 v1 = (struct lov_user_md_v1 *)((char *)lmm + off);
2615 lmm->lmm_stripe_size = v1->lmm_stripe_size;
2620 *lmm_size = lmmsize;
2625 static int ll_lov_setea(struct inode *inode, struct file *file,
2628 __u64 flags = MDS_OPEN_HAS_OBJS | FMODE_WRITE;
2629 struct lov_user_md *lump;
2630 int lum_size = sizeof(*lump) + sizeof(struct lov_user_ost_data);
2634 if (!capable(CAP_SYS_ADMIN))
2637 OBD_ALLOC_LARGE(lump, lum_size);
2641 if (copy_from_user(lump, arg, lum_size))
2642 GOTO(out_lump, rc = -EFAULT);
2644 rc = ll_lov_setstripe_ea_info(inode, file_dentry(file), flags, lump,
2646 cl_lov_delay_create_clear(&file->f_flags);
2649 OBD_FREE_LARGE(lump, lum_size);
2653 static int ll_file_getstripe(struct inode *inode, void __user *lum, size_t size)
2660 /* exit before doing any work if pointer is bad */
2661 if (unlikely(!ll_access_ok(lum, sizeof(struct lov_user_md))))
2664 env = cl_env_get(&refcheck);
2666 RETURN(PTR_ERR(env));
2668 rc = cl_object_getstripe(env, ll_i2info(inode)->lli_clob, lum, size);
2669 cl_env_put(env, &refcheck);
2673 static int ll_lov_setstripe(struct inode *inode, struct file *file,
2676 struct lov_user_md __user *lum = arg;
2677 struct lov_user_md *klum;
2679 __u64 flags = FMODE_WRITE;
2682 rc = ll_copy_user_md(lum, &klum);
2687 rc = ll_lov_setstripe_ea_info(inode, file_dentry(file), flags, klum,
2692 rc = put_user(0, &lum->lmm_stripe_count);
2696 rc = ll_layout_refresh(inode, &gen);
2700 rc = ll_file_getstripe(inode, arg, lum_size);
2701 if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode) &&
2702 ll_i2info(inode)->lli_clob) {
2703 struct iattr attr = { 0 };
2705 rc = cl_setattr_ost(ll_i2info(inode)->lli_clob, &attr,
2706 OP_XVALID_FLAGS, LUSTRE_ENCRYPT_FL);
2709 cl_lov_delay_create_clear(&file->f_flags);
2712 OBD_FREE_LARGE(klum, lum_size);
2718 ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg)
2720 struct ll_inode_info *lli = ll_i2info(inode);
2721 struct cl_object *obj = lli->lli_clob;
2722 struct ll_file_data *fd = file->private_data;
2723 struct ll_grouplock grouplock;
2728 CWARN("group id for group lock must not be 0\n");
2732 if (ll_file_nolock(file))
2733 RETURN(-EOPNOTSUPP);
2735 if (file->f_flags & O_NONBLOCK) {
2736 if (!mutex_trylock(&lli->lli_group_mutex))
2739 mutex_lock(&lli->lli_group_mutex);
2742 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
2743 CWARN("group lock already existed with gid %lu\n",
2744 fd->fd_grouplock.lg_gid);
2745 GOTO(out, rc = -EINVAL);
2747 if (arg != lli->lli_group_gid && lli->lli_group_users != 0) {
2748 if (file->f_flags & O_NONBLOCK)
2749 GOTO(out, rc = -EAGAIN);
2750 mutex_unlock(&lli->lli_group_mutex);
2751 wait_var_event(&lli->lli_group_users, !lli->lli_group_users);
2752 GOTO(retry, rc = 0);
2754 LASSERT(fd->fd_grouplock.lg_lock == NULL);
2757 * XXX: group lock needs to protect all OST objects while PFL
2758 * can add new OST objects during the IO, so we'd instantiate
2759 * all OST objects before getting its group lock.
2764 struct cl_layout cl = {
2765 .cl_is_composite = false,
2767 struct lu_extent ext = {
2769 .e_end = OBD_OBJECT_EOF,
2772 env = cl_env_get(&refcheck);
2774 GOTO(out, rc = PTR_ERR(env));
2776 rc = cl_object_layout_get(env, obj, &cl);
2777 if (rc >= 0 && cl.cl_is_composite)
2778 rc = ll_layout_write_intent(inode, LAYOUT_INTENT_WRITE,
2781 cl_env_put(env, &refcheck);
2786 rc = cl_get_grouplock(ll_i2info(inode)->lli_clob,
2787 arg, (file->f_flags & O_NONBLOCK), &grouplock);
2792 fd->fd_flags |= LL_FILE_GROUP_LOCKED;
2793 fd->fd_grouplock = grouplock;
2794 if (lli->lli_group_users == 0)
2795 lli->lli_group_gid = grouplock.lg_gid;
2796 lli->lli_group_users++;
2798 CDEBUG(D_INFO, "group lock %lu obtained\n", arg);
2800 mutex_unlock(&lli->lli_group_mutex);
2805 static int ll_put_grouplock(struct inode *inode, struct file *file,
2808 struct ll_inode_info *lli = ll_i2info(inode);
2809 struct ll_file_data *fd = file->private_data;
2810 struct ll_grouplock grouplock;
2814 mutex_lock(&lli->lli_group_mutex);
2815 if (!(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
2816 CWARN("no group lock held\n");
2817 GOTO(out, rc = -EINVAL);
2820 LASSERT(fd->fd_grouplock.lg_lock != NULL);
2822 if (fd->fd_grouplock.lg_gid != arg) {
2823 CWARN("group lock %lu doesn't match current id %lu\n",
2824 arg, fd->fd_grouplock.lg_gid);
2825 GOTO(out, rc = -EINVAL);
2828 grouplock = fd->fd_grouplock;
2829 memset(&fd->fd_grouplock, 0, sizeof(fd->fd_grouplock));
2830 fd->fd_flags &= ~LL_FILE_GROUP_LOCKED;
2832 cl_put_grouplock(&grouplock);
2834 lli->lli_group_users--;
2835 if (lli->lli_group_users == 0) {
2836 lli->lli_group_gid = 0;
2837 wake_up_var(&lli->lli_group_users);
2839 CDEBUG(D_INFO, "group lock %lu released\n", arg);
2842 mutex_unlock(&lli->lli_group_mutex);
2848 * Close inode open handle
2850 * \param dentry [in] dentry which contains the inode
2851 * \param it [in,out] intent which contains open info and result
2854 * \retval <0 failure
2856 int ll_release_openhandle(struct dentry *dentry, struct lookup_intent *it)
2858 struct inode *inode = dentry->d_inode;
2859 struct obd_client_handle *och;
2865 /* Root ? Do nothing. */
2866 if (is_root_inode(inode))
2869 /* No open handle to close? Move away */
2870 if (!it_disposition(it, DISP_OPEN_OPEN))
2873 LASSERT(it_open_error(DISP_OPEN_OPEN, it) == 0);
2875 OBD_ALLOC(och, sizeof(*och));
2877 GOTO(out, rc = -ENOMEM);
2879 rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och);
2883 rc = ll_close_inode_openhandle(inode, och, 0, NULL);
2885 /* this one is in place of ll_file_open */
2886 if (it_disposition(it, DISP_ENQ_OPEN_REF)) {
2887 ptlrpc_req_finished(it->it_request);
2888 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
2894 * Get size for inode for which FIEMAP mapping is requested.
2895 * Make the FIEMAP get_info call and returns the result.
2896 * \param fiemap kernel buffer to hold extens
2897 * \param num_bytes kernel buffer size
2899 static int ll_do_fiemap(struct inode *inode, struct fiemap *fiemap,
2905 struct ll_fiemap_info_key fmkey = { .lfik_name = KEY_FIEMAP, };
2908 /* Checks for fiemap flags */
2909 if (fiemap->fm_flags & ~LUSTRE_FIEMAP_FLAGS_COMPAT) {
2910 fiemap->fm_flags &= ~LUSTRE_FIEMAP_FLAGS_COMPAT;
2914 /* Check for FIEMAP_FLAG_SYNC */
2915 if (fiemap->fm_flags & FIEMAP_FLAG_SYNC) {
2916 rc = filemap_fdatawrite(inode->i_mapping);
2921 env = cl_env_get(&refcheck);
2923 RETURN(PTR_ERR(env));
2925 if (i_size_read(inode) == 0) {
2926 rc = ll_glimpse_size(inode);
2931 fmkey.lfik_oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLPROJID;
2932 obdo_from_inode(&fmkey.lfik_oa, inode, OBD_MD_FLSIZE);
2933 obdo_set_parent_fid(&fmkey.lfik_oa, &ll_i2info(inode)->lli_fid);
2935 /* If filesize is 0, then there would be no objects for mapping */
2936 if (fmkey.lfik_oa.o_size == 0) {
2937 fiemap->fm_mapped_extents = 0;
2941 fmkey.lfik_fiemap = *fiemap;
2943 rc = cl_object_fiemap(env, ll_i2info(inode)->lli_clob,
2944 &fmkey, fiemap, &num_bytes);
2946 cl_env_put(env, &refcheck);
2950 static int fid2path_for_enc_file(struct inode *parent, char *gfpath,
2953 struct dentry *de = NULL, *de_parent = d_find_any_alias(parent);
2954 struct llcrypt_str lltr = LLTR_INIT(NULL, 0);
2955 struct llcrypt_str de_name;
2956 char *p, *ptr = gfpath;
2957 size_t len = 0, len_orig = 0;
2958 int enckey = -1, nameenc = -1;
2962 while ((p = strsep(&gfpath, "/")) != NULL) {
2970 len_orig = strlen(p);
2972 rc = sscanf(p, "["SFID"]", RFID(&fid));
2974 p = strchr(p, ']') + 1;
2980 if (!IS_ENCRYPTED(parent)) {
2981 if (gfpathlen < len + 1) {
2986 memmove(ptr, p, len);
2990 gfpathlen -= len + 1;
2994 /* From here, we know parent is encrypted */
2997 rc = llcrypt_prepare_readdir(parent);
2998 if (rc && rc != -ENOKEY) {
3005 if (llcrypt_has_encryption_key(parent))
3011 llcrypt_policy_has_filename_enc(parent);
3014 /* Even if names are not encrypted, we still need to call
3015 * ll_fname_disk_to_usr in order to decode names as they are
3016 * coming from the wire.
3018 rc = llcrypt_fname_alloc_buffer(parent, NAME_MAX + 1, &lltr);
3026 rc = ll_fname_disk_to_usr(parent, 0, 0, &de_name,
3029 llcrypt_fname_free_buffer(&lltr);
3033 lltr.name[lltr.len] = '\0';
3035 if (lltr.len <= len_orig && gfpathlen >= lltr.len + 1) {
3036 memcpy(ptr, lltr.name, lltr.len);
3041 gfpathlen -= lltr.len + 1;
3045 llcrypt_fname_free_buffer(&lltr);
3047 if (rc == -EOVERFLOW) {
3054 /* We reached the end of the string, which means
3055 * we are dealing with the last component in the path.
3056 * So save a useless lookup and exit.
3062 if (enckey == 0 || nameenc == 0)
3066 de = lookup_one_len(p, de_parent, len);
3067 inode_unlock(parent);
3068 if (IS_ERR_OR_NULL(de) || !de->d_inode) {
3074 parent = de->d_inode;
3081 if (!IS_ERR_OR_NULL(de))
3086 int __ll_fid2path(struct inode *inode, struct getinfo_fid2path *gfout,
3087 size_t outsize, __u32 pathlen_orig)
3089 struct obd_export *exp = ll_i2mdexp(inode);
3092 /* Append root FID after gfout to let MDT know the root FID so that
3093 * it can lookup the correct path, this is mainly for fileset.
3094 * old server without fileset mount support will ignore this.
3096 *gfout->gf_u.gf_root_fid = *ll_inode2fid(inode);
3098 /* Call mdc_iocontrol */
3099 rc = obd_iocontrol(OBD_IOC_FID2PATH, exp, outsize, gfout, NULL);
3101 if (!rc && gfout->gf_pathlen && gfout->gf_u.gf_path[0] == '/') {
3102 /* by convention, server side (mdt_path_current()) puts
3103 * a leading '/' to tell client that we are dealing with
3106 rc = fid2path_for_enc_file(inode, gfout->gf_u.gf_path,
3108 if (!rc && strlen(gfout->gf_u.gf_path) > pathlen_orig)
3115 int ll_fid2path(struct inode *inode, void __user *arg)
3117 const struct getinfo_fid2path __user *gfin = arg;
3118 __u32 pathlen, pathlen_orig;
3119 struct getinfo_fid2path *gfout;
3125 if (!capable(CAP_DAC_READ_SEARCH) &&
3126 !test_bit(LL_SBI_USER_FID2PATH, ll_i2sbi(inode)->ll_flags))
3129 /* Only need to get the buflen */
3130 if (get_user(pathlen, &gfin->gf_pathlen))
3133 if (pathlen > PATH_MAX)
3135 pathlen_orig = pathlen;
3138 outsize = sizeof(*gfout) + pathlen;
3139 OBD_ALLOC(gfout, outsize);
3143 if (copy_from_user(gfout, arg, sizeof(*gfout)))
3144 GOTO(gf_free, rc = -EFAULT);
3146 gfout->gf_pathlen = pathlen;
3147 rc = __ll_fid2path(inode, gfout, outsize, pathlen_orig);
3151 if (copy_to_user(arg, gfout, sizeof(*gfout) + pathlen_orig))
3155 OBD_FREE(gfout, outsize);
3156 if (rc == -ENAMETOOLONG) {
3157 pathlen += PATH_MAX;
3164 ll_ioc_data_version(struct inode *inode, struct ioc_data_version *ioc)
3166 struct cl_object *obj = ll_i2info(inode)->lli_clob;
3174 ioc->idv_version = 0;
3175 ioc->idv_layout_version = UINT_MAX;
3177 /* If no file object initialized, we consider its version is 0. */
3181 env = cl_env_get(&refcheck);
3183 RETURN(PTR_ERR(env));
3185 io = vvp_env_thread_io(env);
3187 io->u.ci_data_version.dv_data_version = 0;
3188 io->u.ci_data_version.dv_layout_version = UINT_MAX;
3189 io->u.ci_data_version.dv_flags = ioc->idv_flags;
3192 if (cl_io_init(env, io, CIT_DATA_VERSION, io->ci_obj) == 0)
3193 result = cl_io_loop(env, io);
3195 result = io->ci_result;
3197 ioc->idv_version = io->u.ci_data_version.dv_data_version;
3198 ioc->idv_layout_version = io->u.ci_data_version.dv_layout_version;
3199 cl_io_fini(env, io);
3201 if (unlikely(io->ci_need_restart))
3204 cl_env_put(env, &refcheck);
3210 * Read the data_version for inode.
3212 * This value is computed using stripe object version on OST.
3213 * Version is computed using server side locking.
3215 * @param flags if do sync on the OST side;
3217 * LL_DV_RD_FLUSH: flush dirty pages, LCK_PR on OSTs
3218 * LL_DV_WR_FLUSH: drop all caching pages, LCK_PW on OSTs
3220 int ll_data_version(struct inode *inode, __u64 *data_version, int flags)
3222 struct ioc_data_version ioc = { .idv_flags = flags };
3225 rc = ll_ioc_data_version(inode, &ioc);
3227 *data_version = ioc.idv_version;
3233 * Trigger a HSM release request for the provided inode.
3235 int ll_hsm_release(struct inode *inode)
3238 struct obd_client_handle *och = NULL;
3239 __u64 data_version = 0;
3245 CDEBUG(D_INODE, "%s: Releasing file "DFID".\n",
3246 ll_i2sbi(inode)->ll_fsname,
3247 PFID(&ll_i2info(inode)->lli_fid));
3249 och = ll_lease_open(inode, NULL, FMODE_WRITE, MDS_OPEN_RELEASE);
3251 GOTO(out, rc = PTR_ERR(och));
3253 /* Grab latest data_version and [am]time values */
3254 rc = ll_data_version(inode, &data_version,
3255 LL_DV_WR_FLUSH | LL_DV_SZ_UPDATE);
3259 env = cl_env_get(&refcheck);
3261 GOTO(out, rc = PTR_ERR(env));
3263 rc = ll_merge_attr(env, inode);
3264 cl_env_put(env, &refcheck);
3266 /* If error happen, we have the wrong size for a file.
3272 /* Release the file.
3273 * NB: lease lock handle is released in mdc_hsm_release_pack() because
3274 * we still need it to pack l_remote_handle to MDT. */
3275 rc = ll_close_inode_openhandle(inode, och, MDS_HSM_RELEASE,
3281 if (och != NULL && !IS_ERR(och)) /* close the file */
3282 ll_lease_close(och, inode, NULL);
3287 struct ll_swap_stack {
3290 struct inode *inode1;
3291 struct inode *inode2;
3296 static int ll_swap_layouts(struct file *file1, struct file *file2,
3297 struct lustre_swap_layouts *lsl)
3299 struct mdc_swap_layouts msl;
3300 struct md_op_data *op_data;
3303 struct ll_swap_stack *llss = NULL;
3306 OBD_ALLOC_PTR(llss);
3310 llss->inode1 = file_inode(file1);
3311 llss->inode2 = file_inode(file2);
3313 rc = ll_check_swap_layouts_validity(llss->inode1, llss->inode2);
3317 /* we use 2 bool because it is easier to swap than 2 bits */
3318 if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV1)
3319 llss->check_dv1 = true;
3321 if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV2)
3322 llss->check_dv2 = true;
3324 /* we cannot use lsl->sl_dvX directly because we may swap them */
3325 llss->dv1 = lsl->sl_dv1;
3326 llss->dv2 = lsl->sl_dv2;
3328 rc = lu_fid_cmp(ll_inode2fid(llss->inode1), ll_inode2fid(llss->inode2));
3329 if (rc == 0) /* same file, done! */
3332 if (rc < 0) { /* sequentialize it */
3333 swap(llss->inode1, llss->inode2);
3335 swap(llss->dv1, llss->dv2);
3336 swap(llss->check_dv1, llss->check_dv2);
3340 if (gid != 0) { /* application asks to flush dirty cache */
3341 rc = ll_get_grouplock(llss->inode1, file1, gid);
3345 rc = ll_get_grouplock(llss->inode2, file2, gid);
3347 ll_put_grouplock(llss->inode1, file1, gid);
3352 /* ultimate check, before swaping the layouts we check if
3353 * dataversion has changed (if requested) */
3354 if (llss->check_dv1) {
3355 rc = ll_data_version(llss->inode1, &dv, 0);
3358 if (dv != llss->dv1)
3359 GOTO(putgl, rc = -EAGAIN);
3362 if (llss->check_dv2) {
3363 rc = ll_data_version(llss->inode2, &dv, 0);
3366 if (dv != llss->dv2)
3367 GOTO(putgl, rc = -EAGAIN);
3370 /* struct md_op_data is used to send the swap args to the mdt
3371 * only flags is missing, so we use struct mdc_swap_layouts
3372 * through the md_op_data->op_data */
3373 /* flags from user space have to be converted before they are send to
3374 * server, no flag is sent today, they are only used on the client */
3377 op_data = ll_prep_md_op_data(NULL, llss->inode1, llss->inode2, NULL, 0,
3378 0, LUSTRE_OPC_ANY, &msl);
3379 if (IS_ERR(op_data))
3380 GOTO(free, rc = PTR_ERR(op_data));
3382 rc = obd_iocontrol(LL_IOC_LOV_SWAP_LAYOUTS, ll_i2mdexp(llss->inode1),
3383 sizeof(*op_data), op_data, NULL);
3384 ll_finish_md_op_data(op_data);
3391 ll_put_grouplock(llss->inode2, file2, gid);
3392 ll_put_grouplock(llss->inode1, file1, gid);
3402 int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss)
3404 struct obd_export *exp = ll_i2mdexp(inode);
3405 struct md_op_data *op_data;
3409 /* Detect out-of range masks */
3410 if ((hss->hss_setmask | hss->hss_clearmask) & ~HSM_FLAGS_MASK)
3413 /* Non-root users are forbidden to set or clear flags which are
3414 * NOT defined in HSM_USER_MASK. */
3415 if (((hss->hss_setmask | hss->hss_clearmask) & ~HSM_USER_MASK) &&
3416 !capable(CAP_SYS_ADMIN))
3419 if (!exp_connect_archive_id_array(exp)) {
3420 /* Detect out-of range archive id */
3421 if ((hss->hss_valid & HSS_ARCHIVE_ID) &&
3422 (hss->hss_archive_id > LL_HSM_ORIGIN_MAX_ARCHIVE))
3426 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
3427 LUSTRE_OPC_ANY, hss);
3428 if (IS_ERR(op_data))
3429 RETURN(PTR_ERR(op_data));
3431 rc = obd_iocontrol(LL_IOC_HSM_STATE_SET, exp, sizeof(*op_data),
3434 ll_finish_md_op_data(op_data);
3439 static int ll_hsm_import(struct inode *inode, struct file *file,
3440 struct hsm_user_import *hui)
3442 struct hsm_state_set *hss = NULL;
3443 struct iattr *attr = NULL;
3447 if (!S_ISREG(inode->i_mode))
3453 GOTO(out, rc = -ENOMEM);
3455 hss->hss_valid = HSS_SETMASK | HSS_ARCHIVE_ID;
3456 hss->hss_archive_id = hui->hui_archive_id;
3457 hss->hss_setmask = HS_ARCHIVED | HS_EXISTS | HS_RELEASED;
3458 rc = ll_hsm_state_set(inode, hss);
3462 OBD_ALLOC_PTR(attr);
3464 GOTO(out, rc = -ENOMEM);
3466 attr->ia_mode = hui->hui_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
3467 attr->ia_mode |= S_IFREG;
3468 attr->ia_uid = make_kuid(&init_user_ns, hui->hui_uid);
3469 attr->ia_gid = make_kgid(&init_user_ns, hui->hui_gid);
3470 attr->ia_size = hui->hui_size;
3471 attr->ia_mtime.tv_sec = hui->hui_mtime;
3472 attr->ia_mtime.tv_nsec = hui->hui_mtime_ns;
3473 attr->ia_atime.tv_sec = hui->hui_atime;
3474 attr->ia_atime.tv_nsec = hui->hui_atime_ns;
3476 attr->ia_valid = ATTR_SIZE | ATTR_MODE | ATTR_FORCE |
3477 ATTR_UID | ATTR_GID |
3478 ATTR_MTIME | ATTR_MTIME_SET |
3479 ATTR_ATIME | ATTR_ATIME_SET;
3483 rc = ll_setattr_raw(file_dentry(file), attr, 0, true);
3487 inode_unlock(inode);
3499 static inline long ll_lease_type_from_fmode(fmode_t fmode)
3501 return ((fmode & FMODE_READ) ? LL_LEASE_RDLCK : 0) |
3502 ((fmode & FMODE_WRITE) ? LL_LEASE_WRLCK : 0);
3505 static int ll_file_futimes_3(struct file *file, const struct ll_futimes_3 *lfu)
3507 struct inode *inode = file_inode(file);
3509 .ia_valid = ATTR_ATIME | ATTR_ATIME_SET |
3510 ATTR_MTIME | ATTR_MTIME_SET |
3513 .tv_sec = lfu->lfu_atime_sec,
3514 .tv_nsec = lfu->lfu_atime_nsec,
3517 .tv_sec = lfu->lfu_mtime_sec,
3518 .tv_nsec = lfu->lfu_mtime_nsec,
3521 .tv_sec = lfu->lfu_ctime_sec,
3522 .tv_nsec = lfu->lfu_ctime_nsec,
3528 if (!capable(CAP_SYS_ADMIN))
3531 if (!S_ISREG(inode->i_mode))
3535 rc = ll_setattr_raw(file_dentry(file), &ia, OP_XVALID_CTIME_SET,
3537 inode_unlock(inode);
3542 static enum cl_lock_mode cl_mode_user_to_kernel(enum lock_mode_user mode)
3545 case MODE_READ_USER:
3547 case MODE_WRITE_USER:
3554 static const char *const user_lockname[] = LOCK_MODE_NAMES;
3556 /* Used to allow the upper layers of the client to request an LDLM lock
3557 * without doing an actual read or write.
3559 * Used for ladvise lockahead to manually request specific locks.
3561 * \param[in] file file this ladvise lock request is on
3562 * \param[in] ladvise ladvise struct describing this lock request
3564 * \retval 0 success, no detailed result available (sync requests
3565 * and requests sent to the server [not handled locally]
3566 * cannot return detailed results)
3567 * \retval LLA_RESULT_{SAME,DIFFERENT} - detailed result of the lock request,
3568 * see definitions for details.
3569 * \retval negative negative errno on error
3571 int ll_file_lock_ahead(struct file *file, struct llapi_lu_ladvise *ladvise)
3573 struct lu_env *env = NULL;
3574 struct cl_io *io = NULL;
3575 struct cl_lock *lock = NULL;
3576 struct cl_lock_descr *descr = NULL;
3577 struct dentry *dentry = file->f_path.dentry;
3578 struct inode *inode = dentry->d_inode;
3579 enum cl_lock_mode cl_mode;
3580 off_t start = ladvise->lla_start;
3581 off_t end = ladvise->lla_end;
3588 "Lock request: file=%pd, inode=%p, mode=%s start=%llu, end=%llu\n",
3589 dentry, dentry->d_inode,
3590 user_lockname[ladvise->lla_lockahead_mode], (__u64) start,
3593 cl_mode = cl_mode_user_to_kernel(ladvise->lla_lockahead_mode);
3595 GOTO(out, result = cl_mode);
3597 /* Get IO environment */
3598 result = cl_io_get(inode, &env, &io, &refcheck);
3602 result = cl_io_init(env, io, CIT_MISC, io->ci_obj);
3605 * nothing to do for this io. This currently happens when
3606 * stripe sub-object's are not yet created.
3608 result = io->ci_result;
3609 } else if (result == 0) {
3610 lock = vvp_env_lock(env);
3611 descr = &lock->cll_descr;
3613 descr->cld_obj = io->ci_obj;
3614 /* Convert byte offsets to pages */
3615 descr->cld_start = start >> PAGE_SHIFT;
3616 descr->cld_end = end >> PAGE_SHIFT;
3617 descr->cld_mode = cl_mode;
3618 /* CEF_MUST is used because we do not want to convert a
3619 * lockahead request to a lockless lock */
3620 descr->cld_enq_flags = CEF_MUST | CEF_LOCK_NO_EXPAND;
3622 if (ladvise->lla_peradvice_flags & LF_ASYNC)
3623 descr->cld_enq_flags |= CEF_SPECULATIVE;
3625 result = cl_lock_request(env, io, lock);
3627 /* On success, we need to release the lock */
3629 cl_lock_release(env, lock);
3631 cl_io_fini(env, io);
3632 cl_env_put(env, &refcheck);
3634 /* -ECANCELED indicates a matching lock with a different extent
3635 * was already present, and -EEXIST indicates a matching lock
3636 * on exactly the same extent was already present.
3637 * We convert them to positive values for userspace to make
3638 * recognizing true errors easier.
3639 * Note we can only return these detailed results on async requests,
3640 * as sync requests look the same as i/o requests for locking. */
3641 if (result == -ECANCELED)
3642 result = LLA_RESULT_DIFFERENT;
3643 else if (result == -EEXIST)
3644 result = LLA_RESULT_SAME;
3649 static const char *const ladvise_names[] = LU_LADVISE_NAMES;
3651 static int ll_ladvise_sanity(struct inode *inode,
3652 struct llapi_lu_ladvise *ladvise)
3654 struct ll_sb_info *sbi = ll_i2sbi(inode);
3655 enum lu_ladvise_type advice = ladvise->lla_advice;
3656 /* Note the peradvice flags is a 32 bit field, so per advice flags must
3657 * be in the first 32 bits of enum ladvise_flags */
3658 __u32 flags = ladvise->lla_peradvice_flags;
3659 /* 3 lines at 80 characters per line, should be plenty */
3662 if (advice > LU_LADVISE_MAX || advice == LU_LADVISE_INVALID) {
3665 "%s: advice with value '%d' not recognized, last supported advice is %s (value '%d'): rc = %d\n",
3666 sbi->ll_fsname, advice,
3667 ladvise_names[LU_LADVISE_MAX-1], LU_LADVISE_MAX-1, rc);
3671 /* Per-advice checks */
3673 case LU_LADVISE_LOCKNOEXPAND:
3674 if (flags & ~LF_LOCKNOEXPAND_MASK) {
3676 CDEBUG(D_VFSTRACE, "%s: Invalid flags (%x) for %s: "
3677 "rc = %d\n", sbi->ll_fsname, flags,
3678 ladvise_names[advice], rc);
3682 case LU_LADVISE_LOCKAHEAD:
3683 /* Currently only READ and WRITE modes can be requested */
3684 if (ladvise->lla_lockahead_mode >= MODE_MAX_USER ||
3685 ladvise->lla_lockahead_mode == 0) {
3687 CDEBUG(D_VFSTRACE, "%s: Invalid mode (%d) for %s: "
3688 "rc = %d\n", sbi->ll_fsname,
3689 ladvise->lla_lockahead_mode,
3690 ladvise_names[advice], rc);
3694 case LU_LADVISE_WILLREAD:
3695 case LU_LADVISE_DONTNEED:
3697 /* Note fall through above - These checks apply to all advices
3698 * except LOCKNOEXPAND */
3699 if (flags & ~LF_DEFAULT_MASK) {
3701 CDEBUG(D_VFSTRACE, "%s: Invalid flags (%x) for %s: "
3702 "rc = %d\n", sbi->ll_fsname, flags,
3703 ladvise_names[advice], rc);
3706 if (ladvise->lla_start >= ladvise->lla_end) {
3708 CDEBUG(D_VFSTRACE, "%s: Invalid range (%llu to %llu) "
3709 "for %s: rc = %d\n", sbi->ll_fsname,
3710 ladvise->lla_start, ladvise->lla_end,
3711 ladvise_names[advice], rc);
3723 * Give file access advices
3725 * The ladvise interface is similar to Linux fadvise() system call, except it
3726 * forwards the advices directly from Lustre client to server. The server side
3727 * codes will apply appropriate read-ahead and caching techniques for the
3728 * corresponding files.
3730 * A typical workload for ladvise is e.g. a bunch of different clients are
3731 * doing small random reads of a file, so prefetching pages into OSS cache
3732 * with big linear reads before the random IO is a net benefit. Fetching
3733 * all that data into each client cache with fadvise() may not be, due to
3734 * much more data being sent to the client.
3736 static int ll_ladvise(struct inode *inode, struct file *file, __u64 flags,
3737 struct llapi_lu_ladvise *ladvise)
3741 struct cl_ladvise_io *lio;
3746 env = cl_env_get(&refcheck);
3748 RETURN(PTR_ERR(env));
3750 io = vvp_env_thread_io(env);
3751 io->ci_obj = ll_i2info(inode)->lli_clob;
3753 /* initialize parameters for ladvise */
3754 lio = &io->u.ci_ladvise;
3755 lio->li_start = ladvise->lla_start;
3756 lio->li_end = ladvise->lla_end;
3757 lio->li_fid = ll_inode2fid(inode);
3758 lio->li_advice = ladvise->lla_advice;
3759 lio->li_flags = flags;
3761 if (cl_io_init(env, io, CIT_LADVISE, io->ci_obj) == 0)
3762 rc = cl_io_loop(env, io);
3766 cl_io_fini(env, io);
3767 cl_env_put(env, &refcheck);
3771 static int ll_lock_noexpand(struct file *file, int flags)
3773 struct ll_file_data *fd = file->private_data;
3775 fd->ll_lock_no_expand = !(flags & LF_UNSET);
3780 int ll_ioctl_fsgetxattr(struct inode *inode, unsigned int cmd,
3783 struct fsxattr fsxattr;
3785 if (copy_from_user(&fsxattr, uarg, sizeof(fsxattr)))
3788 fsxattr.fsx_xflags = ll_inode_flags_to_xflags(inode->i_flags);
3789 if (test_bit(LLIF_PROJECT_INHERIT, &ll_i2info(inode)->lli_flags))
3790 fsxattr.fsx_xflags |= FS_XFLAG_PROJINHERIT;
3791 fsxattr.fsx_projid = ll_i2info(inode)->lli_projid;
3792 if (copy_to_user(uarg, &fsxattr, sizeof(fsxattr)))
3798 int ll_ioctl_check_project(struct inode *inode, __u32 xflags,
3802 * Project Quota ID state is only allowed to change from within the init
3803 * namespace. Enforce that restriction only if we are trying to change
3804 * the quota ID state. Everything else is allowed in user namespaces.
3806 if (current_user_ns() == &init_user_ns) {
3808 * Caller is allowed to change the project ID. if it is being
3809 * changed, make sure that the new value is valid.
3811 if (ll_i2info(inode)->lli_projid != projid &&
3812 !projid_valid(make_kprojid(&init_user_ns, projid)))
3818 if (ll_i2info(inode)->lli_projid != projid)
3821 if (test_bit(LLIF_PROJECT_INHERIT, &ll_i2info(inode)->lli_flags)) {
3822 if (!(xflags & FS_XFLAG_PROJINHERIT))
3825 if (xflags & FS_XFLAG_PROJINHERIT)
3832 static int ll_set_project(struct inode *inode, __u32 xflags, __u32 projid)
3834 struct ptlrpc_request *req = NULL;
3835 struct md_op_data *op_data;
3836 struct cl_object *obj;
3837 unsigned int inode_flags;
3840 CDEBUG(D_QUOTA, DFID" xflags=%x projid=%u\n",
3841 PFID(ll_inode2fid(inode)), xflags, projid);
3842 rc = ll_ioctl_check_project(inode, xflags, projid);
3846 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
3847 LUSTRE_OPC_ANY, NULL);
3848 if (IS_ERR(op_data))
3849 RETURN(PTR_ERR(op_data));
3851 inode_flags = ll_xflags_to_inode_flags(xflags);
3852 op_data->op_attr_flags = ll_inode_to_ext_flags(inode_flags);
3853 if (xflags & FS_XFLAG_PROJINHERIT)
3854 op_data->op_attr_flags |= LUSTRE_PROJINHERIT_FL;
3856 /* pass projid to md_op_data */
3857 op_data->op_projid = projid;
3859 op_data->op_xvalid |= OP_XVALID_PROJID | OP_XVALID_FLAGS;
3860 rc = md_setattr(ll_i2sbi(inode)->ll_md_exp, op_data, NULL, 0, &req);
3861 ptlrpc_req_finished(req);
3863 GOTO(out_fsxattr, rc);
3864 ll_update_inode_flags(inode, op_data->op_attr_flags);
3866 /* Avoid OST RPC if this is only ioctl setting project inherit flag */
3867 if (xflags == 0 || xflags == FS_XFLAG_PROJINHERIT)
3868 GOTO(out_fsxattr, rc);
3870 obj = ll_i2info(inode)->lli_clob;
3872 struct iattr attr = { 0 };
3874 rc = cl_setattr_ost(obj, &attr, OP_XVALID_FLAGS, xflags);
3878 ll_finish_md_op_data(op_data);
3882 int ll_ioctl_fssetxattr(struct inode *inode, unsigned int cmd,
3885 struct fsxattr fsxattr;
3889 if (copy_from_user(&fsxattr, uarg, sizeof(fsxattr)))
3892 RETURN(ll_set_project(inode, fsxattr.fsx_xflags,
3893 fsxattr.fsx_projid));
3896 int ll_ioctl_project(struct file *file, unsigned int cmd, void __user *uarg)
3898 struct lu_project lu_project;
3899 struct dentry *dentry = file_dentry(file);
3900 struct inode *inode = file_inode(file);
3901 struct dentry *child_dentry = NULL;
3902 int rc = 0, name_len;
3904 if (copy_from_user(&lu_project, uarg, sizeof(lu_project)))
3907 /* apply child dentry if name is valid */
3908 name_len = strnlen(lu_project.project_name, NAME_MAX);
3909 if (name_len > 0 && name_len <= NAME_MAX) {
3911 child_dentry = lookup_one_len(lu_project.project_name,
3913 inode_unlock(inode);
3914 if (IS_ERR(child_dentry)) {
3915 rc = PTR_ERR(child_dentry);
3918 inode = child_dentry->d_inode;
3923 } else if (name_len > NAME_MAX) {
3928 switch (lu_project.project_type) {
3929 case LU_PROJECT_SET:
3930 rc = ll_set_project(inode, lu_project.project_xflags,
3931 lu_project.project_id);
3933 case LU_PROJECT_GET:
3934 lu_project.project_xflags =
3935 ll_inode_flags_to_xflags(inode->i_flags);
3936 if (test_bit(LLIF_PROJECT_INHERIT,
3937 &ll_i2info(inode)->lli_flags))
3938 lu_project.project_xflags |= FS_XFLAG_PROJINHERIT;
3939 lu_project.project_id = ll_i2info(inode)->lli_projid;
3940 if (copy_to_user(uarg, &lu_project, sizeof(lu_project))) {
3950 if (!IS_ERR_OR_NULL(child_dentry))
3955 static long ll_file_unlock_lease(struct file *file, struct ll_ioc_lease *ioc,
3958 struct inode *inode = file_inode(file);
3959 struct ll_file_data *fd = file->private_data;
3960 struct ll_inode_info *lli = ll_i2info(inode);
3961 struct obd_client_handle *och = NULL;
3962 struct split_param sp;
3963 struct pcc_param param;
3964 bool lease_broken = false;
3966 enum mds_op_bias bias = 0;
3968 struct file *layout_file = NULL;
3970 size_t data_size = 0;
3971 bool attached = false;
3976 mutex_lock(&lli->lli_och_mutex);
3977 if (fd->fd_lease_och != NULL) {
3978 och = fd->fd_lease_och;
3979 fd->fd_lease_och = NULL;
3981 mutex_unlock(&lli->lli_och_mutex);
3986 fmode = och->och_flags;
3988 switch (ioc->lil_flags) {
3989 case LL_LEASE_RESYNC_DONE:
3990 if (ioc->lil_count > IOC_IDS_MAX)
3991 GOTO(out_lease_close, rc = -EINVAL);
3993 data_size = offsetof(typeof(*ioc), lil_ids[ioc->lil_count]);
3994 OBD_ALLOC(data, data_size);
3996 GOTO(out_lease_close, rc = -ENOMEM);
3998 if (copy_from_user(data, uarg, data_size))
3999 GOTO(out_lease_close, rc = -EFAULT);
4001 bias = MDS_CLOSE_RESYNC_DONE;
4003 case LL_LEASE_LAYOUT_MERGE:
4004 if (ioc->lil_count != 1)
4005 GOTO(out_lease_close, rc = -EINVAL);
4007 uarg += sizeof(*ioc);
4008 if (copy_from_user(&fdv, uarg, sizeof(fdv)))
4009 GOTO(out_lease_close, rc = -EFAULT);
4011 layout_file = fget(fdv);
4013 GOTO(out_lease_close, rc = -EBADF);
4015 if ((file->f_flags & O_ACCMODE) == O_RDONLY ||
4016 (layout_file->f_flags & O_ACCMODE) == O_RDONLY)
4017 GOTO(out_lease_close, rc = -EPERM);
4019 data = file_inode(layout_file);
4020 bias = MDS_CLOSE_LAYOUT_MERGE;
4022 case LL_LEASE_LAYOUT_SPLIT: {
4025 if (ioc->lil_count != 2)
4026 GOTO(out_lease_close, rc = -EINVAL);
4028 uarg += sizeof(*ioc);
4029 if (copy_from_user(&fdv, uarg, sizeof(fdv)))
4030 GOTO(out_lease_close, rc = -EFAULT);
4032 uarg += sizeof(fdv);
4033 if (copy_from_user(&mirror_id, uarg, sizeof(mirror_id)))
4034 GOTO(out_lease_close, rc = -EFAULT);
4035 if (mirror_id >= MIRROR_ID_NEG)
4036 GOTO(out_lease_close, rc = -EINVAL);
4038 layout_file = fget(fdv);
4040 GOTO(out_lease_close, rc = -EBADF);
4042 /* if layout_file == file, it means to destroy the mirror */
4043 sp.sp_inode = file_inode(layout_file);
4044 sp.sp_mirror_id = (__u16)mirror_id;
4046 bias = MDS_CLOSE_LAYOUT_SPLIT;
4049 case LL_LEASE_PCC_ATTACH:
4050 if (ioc->lil_count != 1)
4053 if (IS_ENCRYPTED(inode))
4054 RETURN(-EOPNOTSUPP);
4056 uarg += sizeof(*ioc);
4057 if (copy_from_user(¶m.pa_archive_id, uarg, sizeof(__u32)))
4058 GOTO(out_lease_close, rc2 = -EFAULT);
4060 rc2 = pcc_readwrite_attach(file, inode, param.pa_archive_id);
4062 GOTO(out_lease_close, rc2);
4065 /* Grab latest data version */
4066 rc2 = ll_data_version(inode, ¶m.pa_data_version,
4069 GOTO(out_lease_close, rc2);
4072 bias = MDS_PCC_ATTACH;
4075 /* without close intent */
4080 rc = ll_lease_close_intent(och, inode, &lease_broken, bias, data);
4084 rc = ll_lease_och_release(inode, file);
4093 if (ioc->lil_flags == LL_LEASE_RESYNC_DONE && data)
4094 OBD_FREE(data, data_size);
4099 if (ioc->lil_flags == LL_LEASE_PCC_ATTACH) {
4102 rc = pcc_readwrite_attach_fini(file, inode,
4103 param.pa_layout_gen,
4108 ll_layout_refresh(inode, &fd->fd_layout_version);
4111 rc = ll_lease_type_from_fmode(fmode);
4115 static long ll_file_set_lease(struct file *file, struct ll_ioc_lease *ioc,
4118 struct inode *inode = file_inode(file);
4119 struct ll_inode_info *lli = ll_i2info(inode);
4120 struct ll_file_data *fd = file->private_data;
4121 struct obd_client_handle *och = NULL;
4122 __u64 open_flags = 0;
4128 switch (ioc->lil_mode) {
4129 case LL_LEASE_WRLCK:
4130 if (!(file->f_mode & FMODE_WRITE))
4132 fmode = FMODE_WRITE;
4134 case LL_LEASE_RDLCK:
4135 if (!(file->f_mode & FMODE_READ))
4139 case LL_LEASE_UNLCK:
4140 RETURN(ll_file_unlock_lease(file, ioc, uarg));
4145 CDEBUG(D_INODE, "Set lease with mode %u\n", fmode);
4147 /* apply for lease */
4148 if (ioc->lil_flags & LL_LEASE_RESYNC)
4149 open_flags = MDS_OPEN_RESYNC;
4150 och = ll_lease_open(inode, file, fmode, open_flags);
4152 RETURN(PTR_ERR(och));
4154 if (ioc->lil_flags & LL_LEASE_RESYNC) {
4155 rc = ll_lease_file_resync(och, inode, uarg);
4157 ll_lease_close(och, inode, NULL);
4160 rc = ll_layout_refresh(inode, &fd->fd_layout_version);
4162 ll_lease_close(och, inode, NULL);
4168 mutex_lock(&lli->lli_och_mutex);
4169 if (fd->fd_lease_och == NULL) {
4170 fd->fd_lease_och = och;
4173 mutex_unlock(&lli->lli_och_mutex);
4175 /* impossible now that only excl is supported for now */
4176 ll_lease_close(och, inode, &lease_broken);
4182 static void ll_heat_get(struct inode *inode, struct lu_heat *heat)
4184 struct ll_inode_info *lli = ll_i2info(inode);
4185 struct ll_sb_info *sbi = ll_i2sbi(inode);
4186 __u64 now = ktime_get_real_seconds();
4189 spin_lock(&lli->lli_heat_lock);
4190 heat->lh_flags = lli->lli_heat_flags;
4191 for (i = 0; i < heat->lh_count; i++)
4192 heat->lh_heat[i] = obd_heat_get(&lli->lli_heat_instances[i],
4193 now, sbi->ll_heat_decay_weight,
4194 sbi->ll_heat_period_second);
4195 spin_unlock(&lli->lli_heat_lock);
4198 static int ll_heat_set(struct inode *inode, enum lu_heat_flag flags)
4200 struct ll_inode_info *lli = ll_i2info(inode);
4203 spin_lock(&lli->lli_heat_lock);
4204 if (flags & LU_HEAT_FLAG_CLEAR)
4205 obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
4207 if (flags & LU_HEAT_FLAG_OFF)
4208 lli->lli_heat_flags |= LU_HEAT_FLAG_OFF;
4210 lli->lli_heat_flags &= ~LU_HEAT_FLAG_OFF;
4212 spin_unlock(&lli->lli_heat_lock);
4218 ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
4220 struct inode *inode = file_inode(file);
4221 struct ll_file_data *fd = file->private_data;
4222 void __user *uarg = (void __user *)arg;
4226 CDEBUG(D_VFSTRACE|D_IOCTL, "VFS Op:inode="DFID"(%pK) cmd=%x arg=%lx\n",
4227 PFID(ll_inode2fid(inode)), inode, cmd, arg);
4228 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
4230 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
4231 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
4234 /* can't do a generic karg == NULL check here, since it is too noisy and
4235 * we need to return -ENOTTY for unsupported ioctls instead of -EINVAL.
4238 case LL_IOC_GETFLAGS:
4239 /* Get the current value of the file flags */
4240 return put_user(fd->fd_flags, (int __user *)arg);
4241 case LL_IOC_SETFLAGS:
4242 case LL_IOC_CLRFLAGS:
4243 /* Set or clear specific file flags */
4244 /* XXX This probably needs checks to ensure the flags are
4245 * not abused, and to handle any flag side effects.
4247 if (get_user(flags, (int __user *)arg))
4250 if (cmd == LL_IOC_SETFLAGS) {
4251 if ((flags & LL_FILE_IGNORE_LOCK) &&
4252 !(file->f_flags & O_DIRECT)) {
4254 CERROR("%s: unable to disable locking on non-O_DIRECT file "DFID": rc = %d\n",
4255 current->comm, PFID(ll_inode2fid(inode)),
4260 fd->fd_flags |= flags;
4262 fd->fd_flags &= ~flags;
4265 case LL_IOC_LOV_SETSTRIPE:
4266 case LL_IOC_LOV_SETSTRIPE_NEW:
4267 RETURN(ll_lov_setstripe(inode, file, uarg));
4268 case LL_IOC_LOV_SETEA:
4269 RETURN(ll_lov_setea(inode, file, uarg));
4270 case LL_IOC_LOV_SWAP_LAYOUTS: {
4272 struct lustre_swap_layouts lsl;
4274 if (copy_from_user(&lsl, uarg, sizeof(lsl)))
4277 if ((file->f_flags & O_ACCMODE) == O_RDONLY)
4280 file2 = fget(lsl.sl_fd);
4284 /* O_WRONLY or O_RDWR */
4285 if ((file2->f_flags & O_ACCMODE) == O_RDONLY)
4286 GOTO(out, rc = -EPERM);
4288 if (lsl.sl_flags & SWAP_LAYOUTS_CLOSE) {
4289 struct obd_client_handle *och = NULL;
4290 struct ll_inode_info *lli;
4291 struct inode *inode2;
4293 lli = ll_i2info(inode);
4294 mutex_lock(&lli->lli_och_mutex);
4295 if (fd->fd_lease_och != NULL) {
4296 och = fd->fd_lease_och;
4297 fd->fd_lease_och = NULL;
4299 mutex_unlock(&lli->lli_och_mutex);
4301 GOTO(out, rc = -ENOLCK);
4302 inode2 = file_inode(file2);
4303 rc = ll_swap_layouts_close(och, inode, inode2);
4305 rc = ll_swap_layouts(file, file2, &lsl);
4311 case LL_IOC_LOV_GETSTRIPE:
4312 case LL_IOC_LOV_GETSTRIPE_NEW:
4313 RETURN(ll_file_getstripe(inode, uarg, 0));
4314 case LL_IOC_GROUP_LOCK:
4315 RETURN(ll_get_grouplock(inode, file, arg));
4316 case LL_IOC_GROUP_UNLOCK:
4317 RETURN(ll_put_grouplock(inode, file, arg));
4318 case LL_IOC_DATA_VERSION: {
4319 struct ioc_data_version idv;
4322 if (copy_from_user(&idv, uarg, sizeof(idv)))
4325 idv.idv_flags &= LL_DV_RD_FLUSH | LL_DV_WR_FLUSH;
4326 rc = ll_ioc_data_version(inode, &idv);
4328 if (rc == 0 && copy_to_user(uarg, &idv, sizeof(idv)))
4333 case LL_IOC_HSM_STATE_GET: {
4334 struct md_op_data *op_data;
4335 struct hsm_user_state *hus;
4338 if (!ll_access_ok(uarg, sizeof(*hus)))
4345 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
4346 LUSTRE_OPC_ANY, hus);
4347 if (IS_ERR(op_data)) {
4348 rc = PTR_ERR(op_data);
4350 rc = obd_iocontrol(cmd, ll_i2mdexp(inode),
4351 sizeof(*op_data), op_data, NULL);
4353 if (copy_to_user(uarg, hus, sizeof(*hus)))
4356 ll_finish_md_op_data(op_data);
4361 case LL_IOC_HSM_STATE_SET: {
4362 struct hsm_state_set *hss;
4369 if (copy_from_user(hss, uarg, sizeof(*hss)))
4372 rc = ll_hsm_state_set(inode, hss);
4377 case LL_IOC_HSM_ACTION: {
4378 struct md_op_data *op_data;
4379 struct hsm_current_action *hca;
4383 if (!ll_access_ok(uarg, sizeof(*hca)))
4390 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
4391 LUSTRE_OPC_ANY, hca);
4392 if (IS_ERR(op_data)) {
4394 RETURN(PTR_ERR(op_data));
4397 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data),
4400 GOTO(skip_copy, rc);
4402 /* The hsm_current_action retreived from the server could
4403 * contain corrupt information. If it is incorrect data collect
4404 * debug information. We still send the data even if incorrect
4405 * to user land to handle.
4407 action = hsm_user_action2name(hca->hca_action);
4408 if (strcmp(action, "UNKNOWN") == 0 ||
4409 hca->hca_state > HPS_DONE) {
4411 "HSM current state %s action %s, offset = %llu, length %llu\n",
4412 hsm_progress_state2name(hca->hca_state), action,
4413 hca->hca_location.offset, hca->hca_location.length);
4416 if (copy_to_user(uarg, hca, sizeof(*hca)))
4419 ll_finish_md_op_data(op_data);
4423 case LL_IOC_SET_LEASE_OLD: {
4424 struct ll_ioc_lease ioc = { .lil_mode = arg };
4426 RETURN(ll_file_set_lease(file, &ioc, 0));
4428 case LL_IOC_SET_LEASE: {
4429 struct ll_ioc_lease ioc;
4431 if (copy_from_user(&ioc, uarg, sizeof(ioc)))
4434 RETURN(ll_file_set_lease(file, &ioc, uarg));
4436 case LL_IOC_GET_LEASE: {
4437 struct ll_inode_info *lli = ll_i2info(inode);
4438 struct ldlm_lock *lock = NULL;
4441 mutex_lock(&lli->lli_och_mutex);
4442 if (fd->fd_lease_och != NULL) {
4443 struct obd_client_handle *och = fd->fd_lease_och;
4445 lock = ldlm_handle2lock(&och->och_lease_handle);
4447 lock_res_and_lock(lock);
4448 if (!ldlm_is_cancel(lock))
4449 fmode = och->och_flags;
4451 unlock_res_and_lock(lock);
4452 LDLM_LOCK_PUT(lock);
4455 mutex_unlock(&lli->lli_och_mutex);
4457 RETURN(ll_lease_type_from_fmode(fmode));
4459 case LL_IOC_HSM_IMPORT: {
4460 struct hsm_user_import *hui;
4466 if (copy_from_user(hui, uarg, sizeof(*hui)))
4469 rc = ll_hsm_import(inode, file, hui);
4474 case LL_IOC_FUTIMES_3: {
4475 struct ll_futimes_3 lfu;
4477 if (copy_from_user(&lfu, uarg, sizeof(lfu)))
4480 RETURN(ll_file_futimes_3(file, &lfu));
4482 case LL_IOC_LADVISE: {
4483 struct llapi_ladvise_hdr *k_ladvise_hdr;
4484 struct llapi_ladvise_hdr __user *u_ladvise_hdr;
4487 int alloc_size = sizeof(*k_ladvise_hdr);
4490 u_ladvise_hdr = uarg;
4491 OBD_ALLOC_PTR(k_ladvise_hdr);
4492 if (k_ladvise_hdr == NULL)
4495 if (copy_from_user(k_ladvise_hdr, u_ladvise_hdr, alloc_size))
4496 GOTO(out_ladvise, rc = -EFAULT);
4498 if (k_ladvise_hdr->lah_magic != LADVISE_MAGIC ||
4499 k_ladvise_hdr->lah_count < 1)
4500 GOTO(out_ladvise, rc = -EINVAL);
4502 num_advise = k_ladvise_hdr->lah_count;
4503 if (num_advise >= LAH_COUNT_MAX)
4504 GOTO(out_ladvise, rc = -EFBIG);
4506 OBD_FREE_PTR(k_ladvise_hdr);
4507 alloc_size = offsetof(typeof(*k_ladvise_hdr),
4508 lah_advise[num_advise]);
4509 OBD_ALLOC(k_ladvise_hdr, alloc_size);
4510 if (k_ladvise_hdr == NULL)
4514 * TODO: submit multiple advices to one server in a single RPC
4516 if (copy_from_user(k_ladvise_hdr, u_ladvise_hdr, alloc_size))
4517 GOTO(out_ladvise, rc = -EFAULT);
4519 for (i = 0; i < num_advise; i++) {
4520 struct llapi_lu_ladvise *k_ladvise =
4521 &k_ladvise_hdr->lah_advise[i];
4522 struct llapi_lu_ladvise __user *u_ladvise =
4523 &u_ladvise_hdr->lah_advise[i];
4525 rc = ll_ladvise_sanity(inode, k_ladvise);
4527 GOTO(out_ladvise, rc);
4529 switch (k_ladvise->lla_advice) {
4530 case LU_LADVISE_LOCKNOEXPAND:
4531 rc = ll_lock_noexpand(file,
4532 k_ladvise->lla_peradvice_flags);
4533 GOTO(out_ladvise, rc);
4534 case LU_LADVISE_LOCKAHEAD:
4536 rc = ll_file_lock_ahead(file, k_ladvise);
4539 GOTO(out_ladvise, rc);
4542 &u_ladvise->lla_lockahead_result))
4543 GOTO(out_ladvise, rc = -EFAULT);
4546 rc = ll_ladvise(inode, file,
4547 k_ladvise_hdr->lah_flags,
4550 GOTO(out_ladvise, rc);
4557 OBD_FREE(k_ladvise_hdr, alloc_size);
4560 case LL_IOC_FLR_SET_MIRROR: {
4561 /* mirror I/O must be direct to avoid polluting page cache
4563 if (!(file->f_flags & O_DIRECT))
4566 fd->fd_designated_mirror = arg;
4569 case LL_IOC_HEAT_GET: {
4570 struct lu_heat uheat;
4571 struct lu_heat *heat;
4574 if (copy_from_user(&uheat, uarg, sizeof(uheat)))
4577 if (uheat.lh_count > OBD_HEAT_COUNT)
4578 uheat.lh_count = OBD_HEAT_COUNT;
4580 size = offsetof(typeof(uheat), lh_heat[uheat.lh_count]);
4581 OBD_ALLOC(heat, size);
4585 heat->lh_count = uheat.lh_count;
4586 ll_heat_get(inode, heat);
4587 rc = copy_to_user(uarg, heat, size);
4588 OBD_FREE(heat, size);
4589 RETURN(rc ? -EFAULT : 0);
4591 case LL_IOC_HEAT_SET: {
4594 if (copy_from_user(&flags, uarg, sizeof(flags)))
4597 rc = ll_heat_set(inode, flags);
4600 case LL_IOC_PCC_DETACH: {
4601 struct lu_pcc_detach *detach;
4603 OBD_ALLOC_PTR(detach);
4607 if (copy_from_user(detach, uarg, sizeof(*detach)))
4608 GOTO(out_detach_free, rc = -EFAULT);
4610 if (!S_ISREG(inode->i_mode))
4611 GOTO(out_detach_free, rc = -EINVAL);
4613 if (!inode_owner_or_capable(&init_user_ns, inode))
4614 GOTO(out_detach_free, rc = -EPERM);
4616 rc = pcc_ioctl_detach(inode, detach->pccd_opt);
4618 OBD_FREE_PTR(detach);
4621 case LL_IOC_PCC_STATE: {
4622 struct lu_pcc_state __user *ustate = uarg;
4623 struct lu_pcc_state *state;
4625 OBD_ALLOC_PTR(state);
4629 if (copy_from_user(state, ustate, sizeof(*state)))
4630 GOTO(out_state, rc = -EFAULT);
4632 rc = pcc_ioctl_state(file, inode, state);
4634 GOTO(out_state, rc);
4636 if (copy_to_user(ustate, state, sizeof(*state)))
4637 GOTO(out_state, rc = -EFAULT);
4640 OBD_FREE_PTR(state);
4644 rc = ll_iocontrol(inode, file, cmd, uarg);
4647 RETURN(obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL, uarg));
4651 loff_t ll_lseek(struct file *file, loff_t offset, int whence)
4653 struct inode *inode = file_inode(file);
4656 struct cl_lseek_io *lsio;
4663 env = cl_env_get(&refcheck);
4665 RETURN(PTR_ERR(env));
4667 io = vvp_env_thread_io(env);
4668 io->ci_obj = ll_i2info(inode)->lli_clob;
4669 ll_io_set_mirror(io, file);
4671 lsio = &io->u.ci_lseek;
4672 lsio->ls_start = offset;
4673 lsio->ls_whence = whence;
4674 lsio->ls_result = -ENXIO;
4677 rc = cl_io_init(env, io, CIT_LSEEK, io->ci_obj);
4679 struct vvp_io *vio = vvp_env_io(env);
4681 vio->vui_fd = file->private_data;
4682 rc = cl_io_loop(env, io);
4686 retval = rc ? : lsio->ls_result;
4687 cl_io_fini(env, io);
4688 } while (unlikely(io->ci_need_restart));
4690 cl_env_put(env, &refcheck);
4692 /* Without the key, SEEK_HOLE return value has to be
4693 * rounded up to next LUSTRE_ENCRYPTION_UNIT_SIZE.
4695 if (llcrypt_require_key(inode) == -ENOKEY && whence == SEEK_HOLE)
4696 retval = round_up(retval, LUSTRE_ENCRYPTION_UNIT_SIZE);
4701 static loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
4703 struct inode *inode = file_inode(file);
4704 loff_t retval = offset, eof = 0;
4705 ktime_t kstart = ktime_get();
4709 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), to=%llu=%#llx(%d)\n",
4710 PFID(ll_inode2fid(inode)), inode, retval, retval,
4713 if (origin == SEEK_END) {
4714 retval = ll_glimpse_size(inode);
4717 eof = i_size_read(inode);
4720 if (origin == SEEK_HOLE || origin == SEEK_DATA) {
4724 /* flush local cache first if any */
4725 cl_sync_file_range(inode, offset, OBD_OBJECT_EOF,
4728 retval = ll_lseek(file, offset, origin);
4731 retval = vfs_setpos(file, retval, ll_file_maxbytes(inode));
4733 retval = generic_file_llseek_size(file, offset, origin,
4734 ll_file_maxbytes(inode), eof);
4737 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK,
4738 ktime_us_delta(ktime_get(), kstart));
4742 static int ll_flush(struct file *file, fl_owner_t id)
4744 struct inode *inode = file_inode(file);
4745 struct ll_inode_info *lli = ll_i2info(inode);
4746 struct ll_file_data *fd = file->private_data;
4749 LASSERT(!S_ISDIR(inode->i_mode));
4751 /* catch async errors that were recorded back when async writeback
4752 * failed for pages in this mapping. */
4753 rc = lli->lli_async_rc;
4754 lli->lli_async_rc = 0;
4755 if (lli->lli_clob != NULL) {
4756 err = lov_read_and_clear_async_rc(lli->lli_clob);
4761 /* The application has been told write failure already.
4762 * Do not report failure again. */
4763 if (fd->fd_write_failed)
4765 return rc ? -EIO : 0;
4769 * Called to make sure a portion of file has been written out.
4770 * if @mode is not CL_FSYNC_LOCAL, it will send OST_SYNC RPCs to OST.
4772 * Return how many pages have been written.
4774 int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end,
4775 enum cl_fsync_mode mode, int ignore_layout)
4779 struct cl_fsync_io *fio;
4784 if (mode != CL_FSYNC_NONE && mode != CL_FSYNC_LOCAL &&
4785 mode != CL_FSYNC_DISCARD && mode != CL_FSYNC_ALL)
4788 env = cl_env_get(&refcheck);
4790 RETURN(PTR_ERR(env));
4792 io = vvp_env_thread_io(env);
4793 io->ci_obj = ll_i2info(inode)->lli_clob;
4794 io->ci_ignore_layout = ignore_layout;
4796 /* initialize parameters for sync */
4797 fio = &io->u.ci_fsync;
4798 fio->fi_start = start;
4800 fio->fi_fid = ll_inode2fid(inode);
4801 fio->fi_mode = mode;
4802 fio->fi_nr_written = 0;
4804 if (cl_io_init(env, io, CIT_FSYNC, io->ci_obj) == 0)
4805 result = cl_io_loop(env, io);
4807 result = io->ci_result;
4809 result = fio->fi_nr_written;
4810 cl_io_fini(env, io);
4811 cl_env_put(env, &refcheck);
4817 * When dentry is provided (the 'else' case), file_dentry() may be
4818 * null and dentry must be used directly rather than pulled from
4819 * file_dentry() as is done otherwise.
4822 int ll_fsync(struct file *file, loff_t start, loff_t end, int datasync)
4824 struct dentry *dentry = file_dentry(file);
4825 struct inode *inode = dentry->d_inode;
4826 struct ll_inode_info *lli = ll_i2info(inode);
4827 struct ptlrpc_request *req;
4828 ktime_t kstart = ktime_get();
4834 "VFS Op:inode="DFID"(%p), start %lld, end %lld, datasync %d\n",
4835 PFID(ll_inode2fid(inode)), inode, start, end, datasync);
4837 /* fsync's caller has already called _fdata{sync,write}, we want
4838 * that IO to finish before calling the osc and mdc sync methods */
4839 rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
4841 /* catch async errors that were recorded back when async writeback
4842 * failed for pages in this mapping. */
4843 if (!S_ISDIR(inode->i_mode)) {
4844 err = lli->lli_async_rc;
4845 lli->lli_async_rc = 0;
4848 if (lli->lli_clob != NULL) {
4849 err = lov_read_and_clear_async_rc(lli->lli_clob);
4855 if (S_ISREG(inode->i_mode) && !lli->lli_synced_to_mds) {
4857 * only the first sync on MDS makes sense,
4858 * everything else is stored on OSTs
4860 err = md_fsync(ll_i2sbi(inode)->ll_md_exp,
4861 ll_inode2fid(inode), &req);
4865 lli->lli_synced_to_mds = true;
4866 ptlrpc_req_finished(req);
4870 if (S_ISREG(inode->i_mode)) {
4871 struct ll_file_data *fd = file->private_data;
4874 /* Sync metadata on MDT first, and then sync the cached data
4877 err = pcc_fsync(file, start, end, datasync, &cached);
4879 err = cl_sync_file_range(inode, start, end,
4881 if (rc == 0 && err < 0)
4884 fd->fd_write_failed = true;
4886 fd->fd_write_failed = false;
4890 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC,
4891 ktime_us_delta(ktime_get(), kstart));
4896 ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
4898 struct inode *inode = file_inode(file);
4899 struct ll_sb_info *sbi = ll_i2sbi(inode);
4900 struct ldlm_enqueue_info einfo = {
4901 .ei_type = LDLM_FLOCK,
4902 .ei_cb_cp = ldlm_flock_completion_ast,
4903 .ei_cbdata = file_lock,
4905 struct md_op_data *op_data;
4906 struct lustre_handle lockh = { 0 };
4907 union ldlm_policy_data flock = { { 0 } };
4908 int fl_type = file_lock->fl_type;
4909 ktime_t kstart = ktime_get();
4915 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID" file_lock=%p\n",
4916 PFID(ll_inode2fid(inode)), file_lock);
4918 if (file_lock->fl_flags & FL_FLOCK) {
4919 LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK));
4920 /* flocks are whole-file locks */
4921 flock.l_flock.end = OFFSET_MAX;
4922 /* For flocks owner is determined by the local file desctiptor*/
4923 flock.l_flock.owner = (unsigned long)file_lock->fl_file;
4924 } else if (file_lock->fl_flags & FL_POSIX) {
4925 flock.l_flock.owner = (unsigned long)file_lock->fl_owner;
4926 flock.l_flock.start = file_lock->fl_start;
4927 flock.l_flock.end = file_lock->fl_end;
4931 flock.l_flock.pid = file_lock->fl_pid;
4933 #if defined(HAVE_LM_COMPARE_OWNER) || defined(lm_compare_owner)
4934 /* Somewhat ugly workaround for svc lockd.
4935 * lockd installs custom fl_lmops->lm_compare_owner that checks
4936 * for the fl_owner to be the same (which it always is on local node
4937 * I guess between lockd processes) and then compares pid.
4938 * As such we assign pid to the owner field to make it all work,
4939 * conflict with normal locks is unlikely since pid space and
4940 * pointer space for current->files are not intersecting */
4941 if (file_lock->fl_lmops && file_lock->fl_lmops->lm_compare_owner)
4942 flock.l_flock.owner = (unsigned long)file_lock->fl_pid;
4947 einfo.ei_mode = LCK_PR;
4950 /* An unlock request may or may not have any relation to
4951 * existing locks so we may not be able to pass a lock handle
4952 * via a normal ldlm_lock_cancel() request. The request may even
4953 * unlock a byte range in the middle of an existing lock. In
4954 * order to process an unlock request we need all of the same
4955 * information that is given with a normal read or write record
4956 * lock request. To avoid creating another ldlm unlock (cancel)
4957 * message we'll treat a LCK_NL flock request as an unlock. */
4958 einfo.ei_mode = LCK_NL;
4961 einfo.ei_mode = LCK_PW;
4965 CERROR("%s: fcntl from '%s' unknown lock type=%d: rc = %d\n",
4966 sbi->ll_fsname, current->comm, fl_type, rc);
4981 flags = LDLM_FL_BLOCK_NOWAIT;
4987 flags = LDLM_FL_TEST_LOCK;
4991 CERROR("%s: fcntl from '%s' unknown lock command=%d: rc = %d\n",
4992 sbi->ll_fsname, current->comm, cmd, rc);
4996 /* Save the old mode so that if the mode in the lock changes we
4997 * can decrement the appropriate reader or writer refcount. */
4998 file_lock->fl_type = einfo.ei_mode;
5000 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
5001 LUSTRE_OPC_ANY, NULL);
5002 if (IS_ERR(op_data))
5003 RETURN(PTR_ERR(op_data));
5005 CDEBUG(D_DLMTRACE, "inode="DFID", pid=%u, flags=%#llx, mode=%u, "
5006 "start=%llu, end=%llu\n", PFID(ll_inode2fid(inode)),
5007 flock.l_flock.pid, flags, einfo.ei_mode,
5008 flock.l_flock.start, flock.l_flock.end);
5010 rc = md_enqueue(sbi->ll_md_exp, &einfo, &flock, op_data, &lockh,
5013 /* Restore the file lock type if not TEST lock. */
5014 if (!(flags & LDLM_FL_TEST_LOCK))
5015 file_lock->fl_type = fl_type;
5017 #ifdef HAVE_LOCKS_LOCK_FILE_WAIT
5018 if ((rc == 0 || file_lock->fl_type == F_UNLCK) &&
5019 !(flags & LDLM_FL_TEST_LOCK))
5020 rc2 = locks_lock_file_wait(file, file_lock);
5022 if ((file_lock->fl_flags & FL_FLOCK) &&
5023 (rc == 0 || file_lock->fl_type == F_UNLCK))
5024 rc2 = flock_lock_file_wait(file, file_lock);
5025 if ((file_lock->fl_flags & FL_POSIX) &&
5026 (rc == 0 || file_lock->fl_type == F_UNLCK) &&
5027 !(flags & LDLM_FL_TEST_LOCK))
5028 rc2 = posix_lock_file_wait(file, file_lock);
5029 #endif /* HAVE_LOCKS_LOCK_FILE_WAIT */
5031 if (rc2 && file_lock->fl_type != F_UNLCK) {
5032 einfo.ei_mode = LCK_NL;
5033 md_enqueue(sbi->ll_md_exp, &einfo, &flock, op_data,
5038 ll_finish_md_op_data(op_data);
5041 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK,
5042 ktime_us_delta(ktime_get(), kstart));
5046 int ll_get_fid_by_name(struct inode *parent, const char *name,
5047 int namelen, struct lu_fid *fid,
5048 struct inode **inode)
5050 struct md_op_data *op_data = NULL;
5051 struct mdt_body *body;
5052 struct ptlrpc_request *req;
5056 op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen, 0,
5057 LUSTRE_OPC_ANY, NULL);
5058 if (IS_ERR(op_data))
5059 RETURN(PTR_ERR(op_data));
5061 op_data->op_valid = OBD_MD_FLID | OBD_MD_FLTYPE;
5062 rc = md_getattr_name(ll_i2sbi(parent)->ll_md_exp, op_data, &req);
5063 ll_finish_md_op_data(op_data);
5067 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
5069 GOTO(out_req, rc = -EFAULT);
5071 *fid = body->mbo_fid1;
5074 rc = ll_prep_inode(inode, &req->rq_pill, parent->i_sb, NULL);
5076 ptlrpc_req_finished(req);
5080 int ll_migrate(struct inode *parent, struct file *file, struct lmv_user_md *lum,
5081 const char *name, __u32 flags)
5083 struct dentry *dchild = NULL;
5084 struct inode *child_inode = NULL;
5085 struct md_op_data *op_data;
5086 struct ptlrpc_request *request = NULL;
5087 struct obd_client_handle *och = NULL;
5089 struct mdt_body *body;
5090 __u64 data_version = 0;
5091 size_t namelen = strlen(name);
5092 int lumlen = lmv_user_md_size(lum->lum_stripe_count, lum->lum_magic);
5096 CDEBUG(D_VFSTRACE, "migrate "DFID"/%s to MDT%04x stripe count %d\n",
5097 PFID(ll_inode2fid(parent)), name,
5098 lum->lum_stripe_offset, lum->lum_stripe_count);
5100 if (lum->lum_magic != cpu_to_le32(LMV_USER_MAGIC) &&
5101 lum->lum_magic != cpu_to_le32(LMV_USER_MAGIC_SPECIFIC))
5102 lustre_swab_lmv_user_md(lum);
5104 /* Get child FID first */
5105 qstr.hash = ll_full_name_hash(file_dentry(file), name, namelen);
5108 dchild = d_lookup(file_dentry(file), &qstr);
5110 if (dchild->d_inode)
5111 child_inode = igrab(dchild->d_inode);
5116 rc = ll_get_fid_by_name(parent, name, namelen, NULL,
5125 if (!(exp_connect_flags2(ll_i2sbi(parent)->ll_md_exp) &
5126 OBD_CONNECT2_DIR_MIGRATE)) {
5127 if (le32_to_cpu(lum->lum_stripe_count) > 1 ||
5128 ll_dir_striped(child_inode)) {
5129 CERROR("%s: MDT doesn't support stripe directory "
5130 "migration!\n", ll_i2sbi(parent)->ll_fsname);
5131 GOTO(out_iput, rc = -EOPNOTSUPP);
5136 * lfs migrate command needs to be blocked on the client
5137 * by checking the migrate FID against the FID of the
5140 if (is_root_inode(child_inode))
5141 GOTO(out_iput, rc = -EINVAL);
5143 op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen,
5144 child_inode->i_mode, LUSTRE_OPC_ANY, NULL);
5145 if (IS_ERR(op_data))
5146 GOTO(out_iput, rc = PTR_ERR(op_data));
5148 inode_lock(child_inode);
5149 op_data->op_fid3 = *ll_inode2fid(child_inode);
5150 if (!fid_is_sane(&op_data->op_fid3)) {
5151 CERROR("%s: migrate %s, but FID "DFID" is insane\n",
5152 ll_i2sbi(parent)->ll_fsname, name,
5153 PFID(&op_data->op_fid3));
5154 GOTO(out_unlock, rc = -EINVAL);
5157 op_data->op_cli_flags |= CLI_MIGRATE | CLI_SET_MEA;
5158 op_data->op_data = lum;
5159 op_data->op_data_size = lumlen;
5161 /* migrate dirent only for subdirs if MDS_MIGRATE_NSONLY set */
5162 if (S_ISDIR(child_inode->i_mode) && (flags & MDS_MIGRATE_NSONLY) &&
5163 lmv_dir_layout_changing(ll_i2info(parent)->lli_lsm_md))
5164 op_data->op_bias |= MDS_MIGRATE_NSONLY;
5167 if (S_ISREG(child_inode->i_mode)) {
5168 och = ll_lease_open(child_inode, NULL, FMODE_WRITE, 0);
5172 GOTO(out_unlock, rc);
5175 rc = ll_data_version(child_inode, &data_version,
5178 GOTO(out_close, rc);
5180 op_data->op_open_handle = och->och_open_handle;
5181 op_data->op_data_version = data_version;
5182 op_data->op_lease_handle = och->och_lease_handle;
5183 op_data->op_bias |= MDS_CLOSE_MIGRATE;
5185 spin_lock(&och->och_mod->mod_open_req->rq_lock);
5186 och->och_mod->mod_open_req->rq_replay = 0;
5187 spin_unlock(&och->och_mod->mod_open_req->rq_lock);
5190 rc = md_rename(ll_i2sbi(parent)->ll_md_exp, op_data,
5191 op_data->op_name, op_data->op_namelen,
5192 op_data->op_name, op_data->op_namelen, &request);
5194 LASSERT(request != NULL);
5195 ll_update_times(request, parent);
5198 if (rc == 0 || rc == -EAGAIN) {
5199 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
5200 LASSERT(body != NULL);
5202 /* If the server does release layout lock, then we cleanup
5203 * the client och here, otherwise release it in out_close: */
5204 if (och && body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED) {
5205 obd_mod_put(och->och_mod);
5206 md_clear_open_replay_data(ll_i2sbi(parent)->ll_md_exp,
5208 och->och_open_handle.cookie = DEAD_HANDLE_MAGIC;
5214 if (request != NULL) {
5215 ptlrpc_req_finished(request);
5219 /* Try again if the lease has cancelled. */
5220 if (rc == -EAGAIN && S_ISREG(child_inode->i_mode))
5225 ll_lease_close(och, child_inode, NULL);
5227 clear_nlink(child_inode);
5229 inode_unlock(child_inode);
5230 ll_finish_md_op_data(op_data);
5237 ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock)
5239 struct ll_file_data *fd = file->private_data;
5243 * In order to avoid flood of warning messages, only print one message
5244 * for one file. And the entire message rate on the client is limited
5245 * by CDEBUG_LIMIT too.
5247 if (!(fd->fd_flags & LL_FILE_FLOCK_WARNING)) {
5248 fd->fd_flags |= LL_FILE_FLOCK_WARNING;
5249 CDEBUG_LIMIT(D_CONSOLE,
5250 "flock disabled, mount with '-o [local]flock' to enable\r\n");
5256 * test if some locks matching bits and l_req_mode are acquired
5257 * - bits can be in different locks
5258 * - if found clear the common lock bits in *bits
5259 * - the bits not found, are kept in *bits
5261 * \param bits [IN] searched lock bits [IN]
5262 * \param l_req_mode [IN] searched lock mode
5263 * \retval boolean, true iff all bits are found
5265 int ll_have_md_lock(struct obd_export *exp, struct inode *inode, __u64 *bits,
5266 enum ldlm_mode l_req_mode)
5268 struct lustre_handle lockh;
5269 union ldlm_policy_data policy;
5270 enum ldlm_mode mode = (l_req_mode == LCK_MINMODE) ?
5271 (LCK_CR | LCK_CW | LCK_PR | LCK_PW) : l_req_mode;
5280 fid = &ll_i2info(inode)->lli_fid;
5281 CDEBUG(D_INFO, "trying to match res "DFID" mode %s\n", PFID(fid),
5282 ldlm_lockname[mode]);
5284 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK;
5285 for (i = 0; i < MDS_INODELOCK_NUMBITS && *bits != 0; i++) {
5286 policy.l_inodebits.bits = *bits & BIT(i);
5287 if (policy.l_inodebits.bits == 0)
5290 if (md_lock_match(exp, flags, fid, LDLM_IBITS, &policy, mode,
5292 struct ldlm_lock *lock;
5294 lock = ldlm_handle2lock(&lockh);
5297 ~(lock->l_policy_data.l_inodebits.bits);
5298 LDLM_LOCK_PUT(lock);
5300 *bits &= ~policy.l_inodebits.bits;
5307 enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits,
5308 struct lustre_handle *lockh, __u64 flags,
5309 enum ldlm_mode mode)
5311 union ldlm_policy_data policy = { .l_inodebits = { bits } };
5316 fid = &ll_i2info(inode)->lli_fid;
5317 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
5319 rc = md_lock_match(ll_i2mdexp(inode), LDLM_FL_BLOCK_GRANTED|flags,
5320 fid, LDLM_IBITS, &policy, mode, lockh);
5325 static int ll_inode_revalidate_fini(struct inode *inode, int rc)
5327 /* Already unlinked. Just update nlink and return success */
5328 if (rc == -ENOENT) {
5330 /* If it is striped directory, and there is bad stripe
5331 * Let's revalidate the dentry again, instead of returning
5333 if (ll_dir_striped(inode))
5336 /* This path cannot be hit for regular files unless in
5337 * case of obscure races, so no need to to validate
5339 if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
5341 } else if (rc != 0) {
5342 CDEBUG_LIMIT((rc == -EACCES || rc == -EIDRM) ? D_INFO : D_ERROR,
5343 "%s: revalidate FID "DFID" error: rc = %d\n",
5344 ll_i2sbi(inode)->ll_fsname,
5345 PFID(ll_inode2fid(inode)), rc);
5351 static int ll_inode_revalidate(struct dentry *dentry, enum ldlm_intent_flags op)
5353 struct inode *parent;
5354 struct inode *inode = dentry->d_inode;
5355 struct obd_export *exp = ll_i2mdexp(inode);
5356 struct lookup_intent oit = {
5359 struct ptlrpc_request *req = NULL;
5360 struct md_op_data *op_data;
5361 const char *name = NULL;
5366 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p),name=%s\n",
5367 PFID(ll_inode2fid(inode)), inode, dentry->d_name.name);
5369 if (exp_connect_flags2(exp) & OBD_CONNECT2_GETATTR_PFID) {
5370 parent = dentry->d_parent->d_inode;
5371 name = dentry->d_name.name;
5372 namelen = dentry->d_name.len;
5377 op_data = ll_prep_md_op_data(NULL, parent, inode, name, namelen, 0,
5378 LUSTRE_OPC_ANY, NULL);
5379 if (IS_ERR(op_data))
5380 RETURN(PTR_ERR(op_data));
5382 /* Call getattr by fid */
5383 if (exp_connect_flags2(exp) & OBD_CONNECT2_GETATTR_PFID)
5384 op_data->op_flags = MF_GETATTR_BY_FID;
5385 rc = md_intent_lock(exp, op_data, &oit, &req, &ll_md_blocking_ast, 0);
5386 ll_finish_md_op_data(op_data);
5388 rc = ll_inode_revalidate_fini(inode, rc);
5392 rc = ll_revalidate_it_finish(req, &oit, dentry);
5394 ll_intent_release(&oit);
5398 /* Unlinked? Unhash dentry, so it is not picked up later by
5399 * do_lookup() -> ll_revalidate_it(). We cannot use d_drop
5400 * here to preserve get_cwd functionality on 2.6.
5402 if (!dentry->d_inode->i_nlink)
5403 d_lustre_invalidate(dentry);
5405 ll_lookup_finish_locks(&oit, dentry);
5407 ptlrpc_req_finished(req);
5412 static int ll_merge_md_attr(struct inode *inode)
5414 struct ll_inode_info *lli = ll_i2info(inode);
5415 struct cl_attr attr = { 0 };
5418 if (!lli->lli_lsm_md)
5421 down_read(&lli->lli_lsm_sem);
5422 if (!lmv_dir_striped(lli->lli_lsm_md)) {
5423 up_read(&lli->lli_lsm_sem);
5426 rc = md_merge_attr(ll_i2mdexp(inode), ll_i2info(inode)->lli_lsm_md,
5427 &attr, ll_md_blocking_ast);
5428 up_read(&lli->lli_lsm_sem);
5432 spin_lock(&inode->i_lock);
5433 set_nlink(inode, attr.cat_nlink);
5434 spin_unlock(&inode->i_lock);
5436 inode->i_blocks = attr.cat_blocks;
5437 i_size_write(inode, attr.cat_size);
5439 ll_i2info(inode)->lli_atime = attr.cat_atime;
5440 ll_i2info(inode)->lli_mtime = attr.cat_mtime;
5441 ll_i2info(inode)->lli_ctime = attr.cat_ctime;
5446 int ll_getattr_dentry(struct dentry *de, struct kstat *stat, u32 request_mask,
5447 unsigned int flags, bool foreign)
5449 struct inode *inode = de->d_inode;
5450 struct ll_sb_info *sbi = ll_i2sbi(inode);
5451 struct ll_inode_info *lli = ll_i2info(inode);
5452 struct inode *dir = de->d_parent->d_inode;
5453 bool need_glimpse = true;
5454 ktime_t kstart = ktime_get();
5457 /* The OST object(s) determine the file size, blocks and mtime. */
5458 if (!(request_mask & STATX_SIZE || request_mask & STATX_BLOCKS ||
5459 request_mask & STATX_MTIME))
5460 need_glimpse = false;
5462 if (dentry_may_statahead(dir, de))
5463 ll_start_statahead(dir, de, need_glimpse &&
5464 !(flags & AT_STATX_DONT_SYNC));
5466 if (flags & AT_STATX_DONT_SYNC)
5467 GOTO(fill_attr, rc = 0);
5469 rc = ll_inode_revalidate(de, IT_GETATTR);
5473 /* foreign file/dir are always of zero length, so don't
5474 * need to validate size.
5476 if (S_ISREG(inode->i_mode) && !foreign) {
5480 GOTO(fill_attr, rc);
5482 rc = pcc_inode_getattr(inode, request_mask, flags, &cached);
5483 if (cached && rc < 0)
5487 GOTO(fill_attr, rc);
5490 * If the returned attr is masked with OBD_MD_FLSIZE &
5491 * OBD_MD_FLBLOCKS & OBD_MD_FLMTIME, it means that the file size
5492 * or blocks obtained from MDT is strictly correct, and the file
5493 * is usually not being modified by clients, and the [a|m|c]time
5494 * got from MDT is also strictly correct.
5495 * Under this circumstance, it does not need to send glimpse
5496 * RPCs to OSTs for file attributes such as the size and blocks.
5498 if (lli->lli_attr_valid & OBD_MD_FLSIZE &&
5499 lli->lli_attr_valid & OBD_MD_FLBLOCKS &&
5500 lli->lli_attr_valid & OBD_MD_FLMTIME) {
5501 inode->i_mtime.tv_sec = lli->lli_mtime;
5502 if (lli->lli_attr_valid & OBD_MD_FLATIME)
5503 inode->i_atime.tv_sec = lli->lli_atime;
5504 if (lli->lli_attr_valid & OBD_MD_FLCTIME)
5505 inode->i_ctime.tv_sec = lli->lli_ctime;
5506 GOTO(fill_attr, rc);
5509 /* In case of restore, the MDT has the right size and has
5510 * already send it back without granting the layout lock,
5511 * inode is up-to-date so glimpse is useless.
5512 * Also to glimpse we need the layout, in case of a running
5513 * restore the MDT holds the layout lock so the glimpse will
5514 * block up to the end of restore (getattr will block)
5516 if (!test_bit(LLIF_FILE_RESTORING, &lli->lli_flags)) {
5517 rc = ll_glimpse_size(inode);
5522 /* If object isn't regular a file then don't validate size. */
5523 /* foreign dir is not striped dir */
5524 if (ll_dir_striped(inode) && !foreign) {
5525 rc = ll_merge_md_attr(inode);
5530 if (lli->lli_attr_valid & OBD_MD_FLATIME)
5531 inode->i_atime.tv_sec = lli->lli_atime;
5532 if (lli->lli_attr_valid & OBD_MD_FLMTIME)
5533 inode->i_mtime.tv_sec = lli->lli_mtime;
5534 if (lli->lli_attr_valid & OBD_MD_FLCTIME)
5535 inode->i_ctime.tv_sec = lli->lli_ctime;
5539 CFS_FAIL_TIMEOUT(OBD_FAIL_GETATTR_DELAY, 30);
5541 if (ll_need_32bit_api(sbi)) {
5542 stat->ino = cl_fid_build_ino(&lli->lli_fid, 1);
5543 stat->dev = ll_compat_encode_dev(inode->i_sb->s_dev);
5544 stat->rdev = ll_compat_encode_dev(inode->i_rdev);
5546 stat->ino = inode->i_ino;
5547 stat->dev = inode->i_sb->s_dev;
5548 stat->rdev = inode->i_rdev;
5551 /* foreign symlink to be exposed as a real symlink */
5553 stat->mode = inode->i_mode;
5555 stat->mode = (inode->i_mode & ~S_IFMT) | S_IFLNK;
5557 stat->uid = inode->i_uid;
5558 stat->gid = inode->i_gid;
5559 stat->atime = inode->i_atime;
5560 stat->mtime = inode->i_mtime;
5561 stat->ctime = inode->i_ctime;
5562 /* stat->blksize is used to tell about preferred IO size */
5563 if (sbi->ll_stat_blksize)
5564 stat->blksize = sbi->ll_stat_blksize;
5565 else if (S_ISREG(inode->i_mode))
5566 stat->blksize = 1 << min(PTLRPC_MAX_BRW_BITS + 1,
5567 LL_MAX_BLKSIZE_BITS);
5569 stat->blksize = 1 << inode->i_sb->s_blocksize_bits;
5571 stat->nlink = inode->i_nlink;
5572 stat->size = i_size_read(inode);
5573 stat->blocks = inode->i_blocks;
5575 #if defined(HAVE_USER_NAMESPACE_ARG) || defined(HAVE_INODEOPS_ENHANCED_GETATTR)
5576 if (flags & AT_STATX_DONT_SYNC) {
5577 if (stat->size == 0 &&
5578 lli->lli_attr_valid & OBD_MD_FLLAZYSIZE)
5579 stat->size = lli->lli_lazysize;
5580 if (stat->blocks == 0 &&
5581 lli->lli_attr_valid & OBD_MD_FLLAZYBLOCKS)
5582 stat->blocks = lli->lli_lazyblocks;
5585 if (lli->lli_attr_valid & OBD_MD_FLBTIME) {
5586 stat->result_mask |= STATX_BTIME;
5587 stat->btime.tv_sec = lli->lli_btime;
5590 stat->attributes_mask = STATX_ATTR_IMMUTABLE | STATX_ATTR_APPEND;
5591 #ifdef HAVE_LUSTRE_CRYPTO
5592 stat->attributes_mask |= STATX_ATTR_ENCRYPTED;
5594 stat->attributes |= ll_inode_to_ext_flags(inode->i_flags);
5595 /* if Lustre specific LUSTRE_ENCRYPT_FL flag is set, also set
5596 * ext4 equivalent to please statx
5598 if (stat->attributes & LUSTRE_ENCRYPT_FL)
5599 stat->attributes |= STATX_ATTR_ENCRYPTED;
5600 stat->result_mask &= request_mask;
5603 ll_stats_ops_tally(sbi, LPROC_LL_GETATTR,
5604 ktime_us_delta(ktime_get(), kstart));
5609 #if defined(HAVE_USER_NAMESPACE_ARG) || defined(HAVE_INODEOPS_ENHANCED_GETATTR)
5610 int ll_getattr(struct user_namespace *mnt_userns, const struct path *path,
5611 struct kstat *stat, u32 request_mask, unsigned int flags)
5613 return ll_getattr_dentry(path->dentry, stat, request_mask, flags,
5617 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
5619 return ll_getattr_dentry(de, stat, STATX_BASIC_STATS,
5620 AT_STATX_SYNC_AS_STAT, false);
5624 int cl_falloc(struct file *file, struct inode *inode, int mode, loff_t offset,
5627 loff_t size = i_size_read(inode);
5635 env = cl_env_get(&refcheck);
5637 RETURN(PTR_ERR(env));
5639 io = vvp_env_thread_io(env);
5640 io->ci_obj = ll_i2info(inode)->lli_clob;
5641 ll_io_set_mirror(io, file);
5643 io->ci_verify_layout = 1;
5644 io->u.ci_setattr.sa_parent_fid = lu_object_fid(&io->ci_obj->co_lu);
5645 io->u.ci_setattr.sa_falloc_mode = mode;
5646 io->u.ci_setattr.sa_falloc_offset = offset;
5647 io->u.ci_setattr.sa_falloc_end = offset + len;
5648 io->u.ci_setattr.sa_subtype = CL_SETATTR_FALLOCATE;
5650 CDEBUG(D_INODE, "UID %u GID %u PRJID %u\n",
5651 from_kuid(&init_user_ns, inode->i_uid),
5652 from_kgid(&init_user_ns, inode->i_gid),
5653 ll_i2info(inode)->lli_projid);
5655 io->u.ci_setattr.sa_falloc_uid = from_kuid(&init_user_ns, inode->i_uid);
5656 io->u.ci_setattr.sa_falloc_gid = from_kgid(&init_user_ns, inode->i_gid);
5657 io->u.ci_setattr.sa_falloc_projid = ll_i2info(inode)->lli_projid;
5659 if (io->u.ci_setattr.sa_falloc_end > size) {
5660 loff_t newsize = io->u.ci_setattr.sa_falloc_end;
5662 /* Check new size against VFS/VM file size limit and rlimit */
5663 rc = inode_newsize_ok(inode, newsize);
5666 if (newsize > ll_file_maxbytes(inode)) {
5667 CDEBUG(D_INODE, "file size too large %llu > %llu\n",
5668 (unsigned long long)newsize,
5669 ll_file_maxbytes(inode));
5676 rc = cl_io_init(env, io, CIT_SETATTR, io->ci_obj);
5678 rc = cl_io_loop(env, io);
5681 cl_io_fini(env, io);
5682 } while (unlikely(io->ci_need_restart));
5685 cl_env_put(env, &refcheck);
5689 long ll_fallocate(struct file *filp, int mode, loff_t offset, loff_t len)
5691 struct inode *inode = file_inode(filp);
5694 if (offset < 0 || len <= 0)
5697 * Encrypted inodes can't handle collapse range or zero range or insert
5698 * range since we would need to re-encrypt blocks with a different IV or
5699 * XTS tweak (which are based on the logical block number).
5700 * Similar to what ext4 does.
5702 if (IS_ENCRYPTED(inode) &&
5703 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE |
5704 FALLOC_FL_ZERO_RANGE)))
5705 RETURN(-EOPNOTSUPP);
5708 * mode == 0 (which is standard prealloc) and PUNCH is supported
5709 * Rest of mode options are not supported yet.
5711 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
5712 RETURN(-EOPNOTSUPP);
5714 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FALLOCATE, 1);
5716 rc = cl_falloc(filp, inode, mode, offset, len);
5718 * ENOTSUPP (524) is an NFSv3 specific error code erroneously
5719 * used by Lustre in several places. Retuning it here would
5720 * confuse applications that explicity test for EOPNOTSUPP
5721 * (95) and fall back to ftruncate().
5723 if (rc == -ENOTSUPP)
5729 static int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
5730 __u64 start, __u64 len)
5734 struct fiemap *fiemap;
5735 unsigned int extent_count = fieinfo->fi_extents_max;
5737 num_bytes = sizeof(*fiemap) + (extent_count *
5738 sizeof(struct fiemap_extent));
5739 OBD_ALLOC_LARGE(fiemap, num_bytes);
5744 fiemap->fm_flags = fieinfo->fi_flags;
5745 fiemap->fm_extent_count = fieinfo->fi_extents_max;
5746 fiemap->fm_start = start;
5747 fiemap->fm_length = len;
5748 if (extent_count > 0 &&
5749 copy_from_user(&fiemap->fm_extents[0], fieinfo->fi_extents_start,
5750 sizeof(struct fiemap_extent)) != 0)
5751 GOTO(out, rc = -EFAULT);
5753 rc = ll_do_fiemap(inode, fiemap, num_bytes);
5755 if (IS_ENCRYPTED(inode)) {
5758 for (i = 0; i < fiemap->fm_mapped_extents; i++)
5759 fiemap->fm_extents[i].fe_flags |=
5760 FIEMAP_EXTENT_DATA_ENCRYPTED |
5761 FIEMAP_EXTENT_ENCODED;
5764 fieinfo->fi_flags = fiemap->fm_flags;
5765 fieinfo->fi_extents_mapped = fiemap->fm_mapped_extents;
5766 if (extent_count > 0 &&
5767 copy_to_user(fieinfo->fi_extents_start, &fiemap->fm_extents[0],
5768 fiemap->fm_mapped_extents *
5769 sizeof(struct fiemap_extent)) != 0)
5770 GOTO(out, rc = -EFAULT);
5772 OBD_FREE_LARGE(fiemap, num_bytes);
5776 int ll_inode_permission(struct user_namespace *mnt_userns, struct inode *inode,
5780 struct ll_sb_info *sbi;
5781 struct root_squash_info *squash;
5782 struct cred *cred = NULL;
5783 const struct cred *old_cred = NULL;
5784 bool squash_id = false;
5785 ktime_t kstart = ktime_get();
5789 if (mask & MAY_NOT_BLOCK)
5793 * as root inode are NOT getting validated in lookup operation,
5794 * need to revalidate PERM before permission check.
5796 if (is_root_inode(inode)) {
5797 rc = ll_inode_revalidate(inode->i_sb->s_root, IT_GETATTR);
5802 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), inode mode %x mask %o\n",
5803 PFID(ll_inode2fid(inode)), inode, inode->i_mode, mask);
5805 /* squash fsuid/fsgid if needed */
5806 sbi = ll_i2sbi(inode);
5807 squash = &sbi->ll_squash;
5808 if (unlikely(squash->rsi_uid != 0 &&
5809 uid_eq(current_fsuid(), GLOBAL_ROOT_UID) &&
5810 !test_bit(LL_SBI_NOROOTSQUASH, sbi->ll_flags))) {
5814 CDEBUG(D_OTHER, "squash creds (%d:%d)=>(%d:%d)\n",
5815 __kuid_val(current_fsuid()), __kgid_val(current_fsgid()),
5816 squash->rsi_uid, squash->rsi_gid);
5818 /* update current process's credentials
5819 * and FS capability */
5820 cred = prepare_creds();
5824 cred->fsuid = make_kuid(&init_user_ns, squash->rsi_uid);
5825 cred->fsgid = make_kgid(&init_user_ns, squash->rsi_gid);
5826 cred->cap_effective = cap_drop_nfsd_set(cred->cap_effective);
5827 cred->cap_effective = cap_drop_fs_set(cred->cap_effective);
5829 old_cred = override_creds(cred);
5832 rc = generic_permission(mnt_userns, inode, mask);
5833 /* restore current process's credentials and FS capability */
5835 revert_creds(old_cred);
5840 ll_stats_ops_tally(sbi, LPROC_LL_INODE_PERM,
5841 ktime_us_delta(ktime_get(), kstart));
5846 /* -o localflock - only provides locally consistent flock locks */
5847 static const struct file_operations ll_file_operations = {
5848 #ifdef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
5849 # ifdef HAVE_SYNC_READ_WRITE
5850 .read = new_sync_read,
5851 .write = new_sync_write,
5853 .read_iter = ll_file_read_iter,
5854 .write_iter = ll_file_write_iter,
5855 #else /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5856 .read = ll_file_read,
5857 .aio_read = ll_file_aio_read,
5858 .write = ll_file_write,
5859 .aio_write = ll_file_aio_write,
5860 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5861 .unlocked_ioctl = ll_file_ioctl,
5862 .open = ll_file_open,
5863 .release = ll_file_release,
5864 .mmap = ll_file_mmap,
5865 .llseek = ll_file_seek,
5866 #ifndef HAVE_DEFAULT_FILE_SPLICE_READ_EXPORT
5867 .splice_read = generic_file_splice_read,
5869 .splice_read = pcc_file_splice_read,
5871 #ifdef HAVE_ITER_FILE_SPLICE_WRITE
5872 .splice_write = iter_file_splice_write,
5876 .fallocate = ll_fallocate,
5879 static const struct file_operations ll_file_operations_flock = {
5880 #ifdef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
5881 # ifdef HAVE_SYNC_READ_WRITE
5882 .read = new_sync_read,
5883 .write = new_sync_write,
5884 # endif /* HAVE_SYNC_READ_WRITE */
5885 .read_iter = ll_file_read_iter,
5886 .write_iter = ll_file_write_iter,
5887 #else /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5888 .read = ll_file_read,
5889 .aio_read = ll_file_aio_read,
5890 .write = ll_file_write,
5891 .aio_write = ll_file_aio_write,
5892 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5893 .unlocked_ioctl = ll_file_ioctl,
5894 .open = ll_file_open,
5895 .release = ll_file_release,
5896 .mmap = ll_file_mmap,
5897 .llseek = ll_file_seek,
5898 #ifndef HAVE_DEFAULT_FILE_SPLICE_READ_EXPORT
5899 .splice_read = generic_file_splice_read,
5901 .splice_read = pcc_file_splice_read,
5903 #ifdef HAVE_ITER_FILE_SPLICE_WRITE
5904 .splice_write = iter_file_splice_write,
5908 .flock = ll_file_flock,
5909 .lock = ll_file_flock,
5910 .fallocate = ll_fallocate,
5913 /* These are for -o noflock - to return ENOSYS on flock calls */
5914 static const struct file_operations ll_file_operations_noflock = {
5915 #ifdef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
5916 # ifdef HAVE_SYNC_READ_WRITE
5917 .read = new_sync_read,
5918 .write = new_sync_write,
5919 # endif /* HAVE_SYNC_READ_WRITE */
5920 .read_iter = ll_file_read_iter,
5921 .write_iter = ll_file_write_iter,
5922 #else /* !HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5923 .read = ll_file_read,
5924 .aio_read = ll_file_aio_read,
5925 .write = ll_file_write,
5926 .aio_write = ll_file_aio_write,
5927 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
5928 .unlocked_ioctl = ll_file_ioctl,
5929 .open = ll_file_open,
5930 .release = ll_file_release,
5931 .mmap = ll_file_mmap,
5932 .llseek = ll_file_seek,
5933 #ifndef HAVE_DEFAULT_FILE_SPLICE_READ_EXPORT
5934 .splice_read = generic_file_splice_read,
5936 .splice_read = pcc_file_splice_read,
5938 #ifdef HAVE_ITER_FILE_SPLICE_WRITE
5939 .splice_write = iter_file_splice_write,
5943 .flock = ll_file_noflock,
5944 .lock = ll_file_noflock,
5945 .fallocate = ll_fallocate,
5948 const struct inode_operations ll_file_inode_operations = {
5949 .setattr = ll_setattr,
5950 .getattr = ll_getattr,
5951 .permission = ll_inode_permission,
5952 #ifdef HAVE_IOP_XATTR
5953 .setxattr = ll_setxattr,
5954 .getxattr = ll_getxattr,
5955 .removexattr = ll_removexattr,
5957 .listxattr = ll_listxattr,
5958 .fiemap = ll_fiemap,
5959 .get_acl = ll_get_acl,
5960 #ifdef HAVE_IOP_SET_ACL
5961 .set_acl = ll_set_acl,
5965 const struct file_operations *ll_select_file_operations(struct ll_sb_info *sbi)
5967 const struct file_operations *fops = &ll_file_operations_noflock;
5969 if (test_bit(LL_SBI_FLOCK, sbi->ll_flags))
5970 fops = &ll_file_operations_flock;
5971 else if (test_bit(LL_SBI_LOCALFLOCK, sbi->ll_flags))
5972 fops = &ll_file_operations;
5977 int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf)
5979 struct ll_inode_info *lli = ll_i2info(inode);
5980 struct cl_object *obj = lli->lli_clob;
5989 env = cl_env_get(&refcheck);
5991 RETURN(PTR_ERR(env));
5993 rc = cl_conf_set(env, lli->lli_clob, conf);
5997 if (conf->coc_opc == OBJECT_CONF_SET) {
5998 struct ldlm_lock *lock = conf->coc_lock;
5999 struct cl_layout cl = {
6003 LASSERT(lock != NULL);
6004 LASSERT(ldlm_has_layout(lock));
6006 /* it can only be allowed to match after layout is
6007 * applied to inode otherwise false layout would be
6008 * seen. Applying layout shoud happen before dropping
6009 * the intent lock. */
6010 ldlm_lock_allow_match(lock);
6012 rc = cl_object_layout_get(env, obj, &cl);
6017 DFID": layout version change: %u -> %u\n",
6018 PFID(&lli->lli_fid), ll_layout_version_get(lli),
6020 ll_layout_version_set(lli, cl.cl_layout_gen);
6024 cl_env_put(env, &refcheck);
6026 RETURN(rc < 0 ? rc : 0);
6029 /* Fetch layout from MDT with getxattr request, if it's not ready yet */
6030 static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
6033 struct ll_sb_info *sbi = ll_i2sbi(inode);
6034 struct ptlrpc_request *req;
6041 CDEBUG(D_INODE, DFID" LVB_READY=%d l_lvb_data=%p l_lvb_len=%d\n",
6042 PFID(ll_inode2fid(inode)), ldlm_is_lvb_ready(lock),
6043 lock->l_lvb_data, lock->l_lvb_len);
6045 if (lock->l_lvb_data != NULL)
6048 /* if layout lock was granted right away, the layout is returned
6049 * within DLM_LVB of dlm reply; otherwise if the lock was ever
6050 * blocked and then granted via completion ast, we have to fetch
6051 * layout here. Please note that we can't use the LVB buffer in
6052 * completion AST because it doesn't have a large enough buffer */
6053 rc = ll_get_default_mdsize(sbi, &lmmsize);
6057 rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), OBD_MD_FLXATTR,
6058 XATTR_NAME_LOV, lmmsize, &req);
6061 GOTO(out, rc = 0); /* empty layout */
6068 if (lmmsize == 0) /* empty layout */
6071 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA, lmmsize);
6073 GOTO(out, rc = -EFAULT);
6075 OBD_ALLOC_LARGE(lvbdata, lmmsize);
6076 if (lvbdata == NULL)
6077 GOTO(out, rc = -ENOMEM);
6079 memcpy(lvbdata, lmm, lmmsize);
6080 lock_res_and_lock(lock);
6081 if (unlikely(lock->l_lvb_data == NULL)) {
6082 lock->l_lvb_type = LVB_T_LAYOUT;
6083 lock->l_lvb_data = lvbdata;
6084 lock->l_lvb_len = lmmsize;
6087 unlock_res_and_lock(lock);
6090 OBD_FREE_LARGE(lvbdata, lmmsize);
6095 ptlrpc_req_finished(req);
6100 * Apply the layout to the inode. Layout lock is held and will be released
6103 static int ll_layout_lock_set(struct lustre_handle *lockh, enum ldlm_mode mode,
6104 struct inode *inode)
6106 struct ll_inode_info *lli = ll_i2info(inode);
6107 struct ll_sb_info *sbi = ll_i2sbi(inode);
6108 struct ldlm_lock *lock;
6109 struct cl_object_conf conf;
6112 bool wait_layout = false;
6115 LASSERT(lustre_handle_is_used(lockh));
6117 lock = ldlm_handle2lock(lockh);
6118 LASSERT(lock != NULL);
6120 if (!ldlm_has_layout(lock))
6121 GOTO(out, rc = -EAGAIN);
6123 LDLM_DEBUG(lock, "file "DFID"(%p) being reconfigured",
6124 PFID(&lli->lli_fid), inode);
6126 /* in case this is a caching lock and reinstate with new inode */
6127 md_set_lock_data(sbi->ll_md_exp, lockh, inode, NULL);
6129 lock_res_and_lock(lock);
6130 lvb_ready = ldlm_is_lvb_ready(lock);
6131 unlock_res_and_lock(lock);
6133 /* checking lvb_ready is racy but this is okay. The worst case is
6134 * that multi processes may configure the file on the same time. */
6138 rc = ll_layout_fetch(inode, lock);
6142 /* for layout lock, lmm is stored in lock's lvb.
6143 * lvb_data is immutable if the lock is held so it's safe to access it
6146 * set layout to file. Unlikely this will fail as old layout was
6147 * surely eliminated */
6148 memset(&conf, 0, sizeof conf);
6149 conf.coc_opc = OBJECT_CONF_SET;
6150 conf.coc_inode = inode;
6151 conf.coc_lock = lock;
6152 conf.u.coc_layout.lb_buf = lock->l_lvb_data;
6153 conf.u.coc_layout.lb_len = lock->l_lvb_len;
6154 rc = ll_layout_conf(inode, &conf);
6156 /* refresh layout failed, need to wait */
6157 wait_layout = rc == -EBUSY;
6160 LDLM_LOCK_PUT(lock);
6161 ldlm_lock_decref(lockh, mode);
6163 /* wait for IO to complete if it's still being used. */
6165 CDEBUG(D_INODE, "%s: "DFID"(%p) wait for layout reconf\n",
6166 sbi->ll_fsname, PFID(&lli->lli_fid), inode);
6168 memset(&conf, 0, sizeof conf);
6169 conf.coc_opc = OBJECT_CONF_WAIT;
6170 conf.coc_inode = inode;
6171 rc = ll_layout_conf(inode, &conf);
6175 CDEBUG(D_INODE, "%s file="DFID" waiting layout return: %d\n",
6176 sbi->ll_fsname, PFID(&lli->lli_fid), rc);
6182 * Issue layout intent RPC to MDS.
6183 * \param inode [in] file inode
6184 * \param intent [in] layout intent
6186 * \retval 0 on success
6187 * \retval < 0 error code
6189 static int ll_layout_intent(struct inode *inode, struct layout_intent *intent)
6191 struct ll_inode_info *lli = ll_i2info(inode);
6192 struct ll_sb_info *sbi = ll_i2sbi(inode);
6193 struct md_op_data *op_data;
6194 struct lookup_intent it;
6195 struct ptlrpc_request *req;
6199 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL,
6200 0, 0, LUSTRE_OPC_ANY, NULL);
6201 if (IS_ERR(op_data))
6202 RETURN(PTR_ERR(op_data));
6204 op_data->op_data = intent;
6205 op_data->op_data_size = sizeof(*intent);
6207 memset(&it, 0, sizeof(it));
6208 it.it_op = IT_LAYOUT;
6209 if (intent->li_opc == LAYOUT_INTENT_WRITE ||
6210 intent->li_opc == LAYOUT_INTENT_TRUNC)
6211 it.it_flags = FMODE_WRITE;
6213 LDLM_DEBUG_NOLOCK("%s: requeue layout lock for file "DFID"(%p)",
6214 sbi->ll_fsname, PFID(&lli->lli_fid), inode);
6216 rc = md_intent_lock(sbi->ll_md_exp, op_data, &it, &req,
6217 &ll_md_blocking_ast, 0);
6218 if (it.it_request != NULL)
6219 ptlrpc_req_finished(it.it_request);
6220 it.it_request = NULL;
6222 ll_finish_md_op_data(op_data);
6224 /* set lock data in case this is a new lock */
6226 ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL);
6228 ll_intent_drop_lock(&it);
6234 * This function checks if there exists a LAYOUT lock on the client side,
6235 * or enqueues it if it doesn't have one in cache.
6237 * This function will not hold layout lock so it may be revoked any time after
6238 * this function returns. Any operations depend on layout should be redone
6241 * This function should be called before lov_io_init() to get an uptodate
6242 * layout version, the caller should save the version number and after IO
6243 * is finished, this function should be called again to verify that layout
6244 * is not changed during IO time.
6246 int ll_layout_refresh(struct inode *inode, __u32 *gen)
6248 struct ll_inode_info *lli = ll_i2info(inode);
6249 struct ll_sb_info *sbi = ll_i2sbi(inode);
6250 struct lustre_handle lockh;
6251 struct layout_intent intent = {
6252 .li_opc = LAYOUT_INTENT_ACCESS,
6254 enum ldlm_mode mode;
6258 *gen = ll_layout_version_get(lli);
6259 if (!test_bit(LL_SBI_LAYOUT_LOCK, sbi->ll_flags) ||
6260 *gen != CL_LAYOUT_GEN_NONE)
6264 LASSERT(fid_is_sane(ll_inode2fid(inode)));
6265 LASSERT(S_ISREG(inode->i_mode));
6267 /* take layout lock mutex to enqueue layout lock exclusively. */
6268 mutex_lock(&lli->lli_layout_mutex);
6271 /* mostly layout lock is caching on the local side, so try to
6272 * match it before grabbing layout lock mutex. */
6273 mode = ll_take_md_lock(inode, MDS_INODELOCK_LAYOUT, &lockh, 0,
6274 LCK_CR | LCK_CW | LCK_PR |
6276 if (mode != 0) { /* hit cached lock */
6277 rc = ll_layout_lock_set(&lockh, mode, inode);
6283 rc = ll_layout_intent(inode, &intent);
6289 *gen = ll_layout_version_get(lli);
6290 mutex_unlock(&lli->lli_layout_mutex);
6296 * Issue layout intent RPC indicating where in a file an IO is about to write.
6298 * \param[in] inode file inode.
6299 * \param[in] ext write range with start offset of fille in bytes where
6300 * an IO is about to write, and exclusive end offset in
6303 * \retval 0 on success
6304 * \retval < 0 error code
6306 int ll_layout_write_intent(struct inode *inode, enum layout_intent_opc opc,
6307 struct lu_extent *ext)
6309 struct layout_intent intent = {
6311 .li_extent.e_start = ext->e_start,
6312 .li_extent.e_end = ext->e_end,
6317 rc = ll_layout_intent(inode, &intent);
6323 * This function send a restore request to the MDT
6325 int ll_layout_restore(struct inode *inode, loff_t offset, __u64 length)
6327 struct hsm_user_request *hur;
6331 len = sizeof(struct hsm_user_request) +
6332 sizeof(struct hsm_user_item);
6333 OBD_ALLOC(hur, len);
6337 hur->hur_request.hr_action = HUA_RESTORE;
6338 hur->hur_request.hr_archive_id = 0;
6339 hur->hur_request.hr_flags = 0;
6340 memcpy(&hur->hur_user_item[0].hui_fid, &ll_i2info(inode)->lli_fid,
6341 sizeof(hur->hur_user_item[0].hui_fid));
6342 hur->hur_user_item[0].hui_extent.offset = offset;
6343 hur->hur_user_item[0].hui_extent.length = length;
6344 hur->hur_request.hr_itemcount = 1;
6345 rc = obd_iocontrol(LL_IOC_HSM_REQUEST, ll_i2sbi(inode)->ll_md_exp,