1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see [sun.com URL with a
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Phil Schwan <phil@clusterfs.com>
40 * Author: Andreas Dilger <adilger@clusterfs.com>
43 #define DEBUG_SUBSYSTEM S_LLITE
44 #include <lustre_dlm.h>
45 #include <lustre_lite.h>
46 #include <lustre_mdc.h>
47 #include <linux/pagemap.h>
48 #include <linux/file.h>
49 #include "llite_internal.h"
51 /* also used by llite/special.c:ll_special_open() */
52 struct ll_file_data *ll_file_data_get(void)
54 struct ll_file_data *fd;
56 OBD_SLAB_ALLOC_PTR(fd, ll_file_data_slab);
60 static void ll_file_data_put(struct ll_file_data *fd)
63 OBD_SLAB_FREE_PTR(fd, ll_file_data_slab);
66 void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
67 struct lustre_handle *fh)
69 op_data->op_fid1 = ll_i2info(inode)->lli_fid;
70 op_data->op_attr.ia_mode = inode->i_mode;
71 op_data->op_attr.ia_atime = inode->i_atime;
72 op_data->op_attr.ia_mtime = inode->i_mtime;
73 op_data->op_attr.ia_ctime = inode->i_ctime;
74 op_data->op_attr.ia_size = i_size_read(inode);
75 op_data->op_attr_blocks = inode->i_blocks;
76 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = inode->i_flags;
77 op_data->op_ioepoch = ll_i2info(inode)->lli_ioepoch;
78 memcpy(&op_data->op_handle, fh, sizeof(op_data->op_handle));
79 op_data->op_capa1 = ll_mdscapa_get(inode);
82 static void ll_prepare_close(struct inode *inode, struct md_op_data *op_data,
83 struct obd_client_handle *och)
87 op_data->op_attr.ia_valid = ATTR_MODE | ATTR_ATIME_SET |
88 ATTR_MTIME_SET | ATTR_CTIME_SET;
90 if (!(och->och_flags & FMODE_WRITE))
93 if (!(ll_i2mdexp(inode)->exp_connect_flags & OBD_CONNECT_SOM) ||
94 !S_ISREG(inode->i_mode))
95 op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
97 ll_epoch_close(inode, op_data, &och, 0);
100 ll_pack_inode2opdata(inode, op_data, &och->och_fh);
104 static int ll_close_inode_openhandle(struct obd_export *md_exp,
106 struct obd_client_handle *och)
108 struct obd_export *exp = ll_i2mdexp(inode);
109 struct md_op_data *op_data;
110 struct ptlrpc_request *req = NULL;
111 struct obd_device *obd = class_exp2obd(exp);
118 * XXX: in case of LMV, is this correct to access
121 CERROR("Invalid MDC connection handle "LPX64"\n",
122 ll_i2mdexp(inode)->exp_handle.h_cookie);
127 * here we check if this is forced umount. If so this is called on
128 * canceling "open lock" and we do not call md_close() in this case, as
129 * it will not be successful, as import is already deactivated.
134 OBD_ALLOC_PTR(op_data);
136 GOTO(out, rc = -ENOMEM); // XXX We leak openhandle and request here.
138 ll_prepare_close(inode, op_data, och);
139 epoch_close = (op_data->op_flags & MF_EPOCH_CLOSE);
140 rc = md_close(md_exp, op_data, och->och_mod, &req);
145 /* This close must have the epoch closed. */
146 LASSERT(exp->exp_connect_flags & OBD_CONNECT_SOM);
147 LASSERT(epoch_close);
148 /* MDS has instructed us to obtain Size-on-MDS attribute from
149 * OSTs and send setattr to back to MDS. */
150 rc = ll_sizeonmds_update(inode, och->och_mod,
151 &och->och_fh, op_data->op_ioepoch);
153 CERROR("inode %lu mdc Size-on-MDS update failed: "
154 "rc = %d\n", inode->i_ino, rc);
158 CERROR("inode %lu mdc close failed: rc = %d\n",
161 ll_finish_md_op_data(op_data);
164 rc = ll_objects_destroy(req, inode);
166 CERROR("inode %lu ll_objects destroy: rc = %d\n",
173 if ((exp->exp_connect_flags & OBD_CONNECT_SOM) && !epoch_close &&
174 S_ISREG(inode->i_mode) && (och->och_flags & FMODE_WRITE)) {
175 ll_queue_done_writing(inode, LLIF_DONE_WRITING);
178 ptlrpc_close_replay_seq(req);
179 md_clear_open_replay_data(md_exp, och);
180 /* Free @och if it is not waiting for DONE_WRITING. */
181 och->och_fh.cookie = DEAD_HANDLE_MAGIC;
184 if (req) /* This is close request */
185 ptlrpc_req_finished(req);
189 int ll_md_real_close(struct inode *inode, int flags)
191 struct ll_inode_info *lli = ll_i2info(inode);
192 struct obd_client_handle **och_p;
193 struct obd_client_handle *och;
198 if (flags & FMODE_WRITE) {
199 och_p = &lli->lli_mds_write_och;
200 och_usecount = &lli->lli_open_fd_write_count;
201 } else if (flags & FMODE_EXEC) {
202 och_p = &lli->lli_mds_exec_och;
203 och_usecount = &lli->lli_open_fd_exec_count;
205 LASSERT(flags & FMODE_READ);
206 och_p = &lli->lli_mds_read_och;
207 och_usecount = &lli->lli_open_fd_read_count;
210 down(&lli->lli_och_sem);
211 if (*och_usecount) { /* There are still users of this handle, so
213 up(&lli->lli_och_sem);
218 up(&lli->lli_och_sem);
220 if (och) { /* There might be a race and somebody have freed this och
222 rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
229 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
232 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
233 struct ll_inode_info *lli = ll_i2info(inode);
237 /* clear group lock, if present */
238 if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
239 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
240 fd->fd_flags &= ~(LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK);
241 rc = ll_extent_unlock(fd, inode, lsm, LCK_GROUP,
245 /* Let's see if we have good enough OPEN lock on the file and if
246 we can skip talking to MDS */
247 if (file->f_dentry->d_inode) { /* Can this ever be false? */
249 int flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
250 struct lustre_handle lockh;
251 struct inode *inode = file->f_dentry->d_inode;
252 ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_OPEN}};
254 down(&lli->lli_och_sem);
255 if (fd->fd_omode & FMODE_WRITE) {
257 LASSERT(lli->lli_open_fd_write_count);
258 lli->lli_open_fd_write_count--;
259 } else if (fd->fd_omode & FMODE_EXEC) {
261 LASSERT(lli->lli_open_fd_exec_count);
262 lli->lli_open_fd_exec_count--;
265 LASSERT(lli->lli_open_fd_read_count);
266 lli->lli_open_fd_read_count--;
268 up(&lli->lli_och_sem);
270 if (!md_lock_match(md_exp, flags, ll_inode2fid(inode),
271 LDLM_IBITS, &policy, lockmode,
273 rc = ll_md_real_close(file->f_dentry->d_inode,
277 CERROR("Releasing a file %p with negative dentry %p. Name %s",
278 file, file->f_dentry, file->f_dentry->d_name.name);
281 LUSTRE_FPRIVATE(file) = NULL;
282 ll_file_data_put(fd);
283 ll_capa_close(inode);
288 int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm);
290 /* While this returns an error code, fput() the caller does not, so we need
291 * to make every effort to clean up all of our state here. Also, applications
292 * rarely check close errors and even if an error is returned they will not
293 * re-try the close call.
295 int ll_file_release(struct inode *inode, struct file *file)
297 struct ll_file_data *fd;
298 struct ll_sb_info *sbi = ll_i2sbi(inode);
299 struct ll_inode_info *lli = ll_i2info(inode);
300 struct lov_stripe_md *lsm = lli->lli_smd;
304 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
305 inode->i_generation, inode);
307 #ifdef CONFIG_FS_POSIX_ACL
308 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
309 inode == inode->i_sb->s_root->d_inode) {
310 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
313 if (unlikely(fd->fd_flags & LL_FILE_RMTACL)) {
314 fd->fd_flags &= ~LL_FILE_RMTACL;
315 rct_del(&sbi->ll_rct, cfs_curproc_pid());
316 et_search_free(&sbi->ll_et, cfs_curproc_pid());
321 if (inode->i_sb->s_root != file->f_dentry)
322 ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
323 fd = LUSTRE_FPRIVATE(file);
326 /* The last ref on @file, maybe not the the owner pid of statahead.
327 * Different processes can open the same dir, "ll_opendir_key" means:
328 * it is me that should stop the statahead thread. */
329 if (lli->lli_opendir_key == fd)
330 ll_stop_statahead(inode, fd);
332 if (inode->i_sb->s_root == file->f_dentry) {
333 LUSTRE_FPRIVATE(file) = NULL;
334 ll_file_data_put(fd);
339 lov_test_and_clear_async_rc(lsm);
340 lli->lli_async_rc = 0;
342 rc = ll_md_close(sbi->ll_md_exp, inode, file);
346 static int ll_intent_file_open(struct file *file, void *lmm,
347 int lmmsize, struct lookup_intent *itp)
349 struct ll_sb_info *sbi = ll_i2sbi(file->f_dentry->d_inode);
350 struct dentry *parent = file->f_dentry->d_parent;
351 const char *name = file->f_dentry->d_name.name;
352 const int len = file->f_dentry->d_name.len;
353 struct md_op_data *op_data;
354 struct ptlrpc_request *req;
361 /* Usually we come here only for NFSD, and we want open lock.
362 But we can also get here with pre 2.6.15 patchless kernels, and in
363 that case that lock is also ok */
364 /* We can also get here if there was cached open handle in revalidate_it
365 * but it disappeared while we were getting from there to ll_file_open.
366 * But this means this file was closed and immediatelly opened which
367 * makes a good candidate for using OPEN lock */
368 /* If lmmsize & lmm are not 0, we are just setting stripe info
369 * parameters. No need for the open lock */
370 if (!lmm && !lmmsize)
371 itp->it_flags |= MDS_OPEN_LOCK;
373 op_data = ll_prep_md_op_data(NULL, parent->d_inode,
374 file->f_dentry->d_inode, name, len,
375 O_RDWR, LUSTRE_OPC_ANY, NULL);
377 RETURN(PTR_ERR(op_data));
379 rc = md_intent_lock(sbi->ll_md_exp, op_data, lmm, lmmsize, itp,
380 0 /*unused */, &req, ll_md_blocking_ast, 0);
381 ll_finish_md_op_data(op_data);
383 /* reason for keep own exit path - don`t flood log
384 * with messages with -ESTALE errors.
386 if (!it_disposition(itp, DISP_OPEN_OPEN) ||
387 it_open_error(DISP_OPEN_OPEN, itp))
389 ll_release_openhandle(file->f_dentry, itp);
393 if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) {
394 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp);
395 CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc);
399 if (itp->d.lustre.it_lock_mode)
400 md_set_lock_data(sbi->ll_md_exp,
401 &itp->d.lustre.it_lock_handle,
402 file->f_dentry->d_inode);
404 rc = ll_prep_inode(&file->f_dentry->d_inode, req, NULL);
406 ptlrpc_req_finished(itp->d.lustre.it_data);
409 it_clear_disposition(itp, DISP_ENQ_COMPLETE);
410 ll_intent_drop_lock(itp);
415 static int ll_och_fill(struct obd_export *md_exp, struct ll_inode_info *lli,
416 struct lookup_intent *it, struct obd_client_handle *och)
418 struct ptlrpc_request *req = it->d.lustre.it_data;
419 struct mdt_body *body;
423 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
424 LASSERT(body != NULL); /* reply already checked out */
426 memcpy(&och->och_fh, &body->handle, sizeof(body->handle));
427 och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
428 och->och_fid = lli->lli_fid;
429 och->och_flags = it->it_flags;
430 lli->lli_ioepoch = body->ioepoch;
432 return md_set_open_replay_data(md_exp, och, req);
435 int ll_local_open(struct file *file, struct lookup_intent *it,
436 struct ll_file_data *fd, struct obd_client_handle *och)
438 struct inode *inode = file->f_dentry->d_inode;
439 struct ll_inode_info *lli = ll_i2info(inode);
442 LASSERT(!LUSTRE_FPRIVATE(file));
447 struct ptlrpc_request *req = it->d.lustre.it_data;
448 struct mdt_body *body;
451 rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, lli, it, och);
455 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
456 if ((it->it_flags & FMODE_WRITE) &&
457 (body->valid & OBD_MD_FLSIZE))
458 CDEBUG(D_INODE, "Epoch "LPU64" opened on "DFID"\n",
459 lli->lli_ioepoch, PFID(&lli->lli_fid));
462 LUSTRE_FPRIVATE(file) = fd;
463 ll_readahead_init(inode, &fd->fd_ras);
464 fd->fd_omode = it->it_flags;
468 /* Open a file, and (for the very first open) create objects on the OSTs at
469 * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object
470 * creation or open until ll_lov_setstripe() ioctl is called. We grab
471 * lli_open_sem to ensure no other process will create objects, send the
472 * stripe MD to the MDS, or try to destroy the objects if that fails.
474 * If we already have the stripe MD locally then we don't request it in
475 * md_open(), by passing a lmm_size = 0.
477 * It is up to the application to ensure no other processes open this file
478 * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
479 * used. We might be able to avoid races of that sort by getting lli_open_sem
480 * before returning in the O_LOV_DELAY_CREATE case and dropping it here
481 * or in ll_file_release(), but I'm not sure that is desirable/necessary.
483 int ll_file_open(struct inode *inode, struct file *file)
485 struct ll_inode_info *lli = ll_i2info(inode);
486 struct lookup_intent *it, oit = { .it_op = IT_OPEN,
487 .it_flags = file->f_flags };
488 struct lov_stripe_md *lsm;
489 struct ptlrpc_request *req = NULL;
490 struct obd_client_handle **och_p;
492 struct ll_file_data *fd;
493 int rc = 0, opendir_set = 0;
496 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), flags %o\n", inode->i_ino,
497 inode->i_generation, inode, file->f_flags);
499 #ifdef HAVE_VFS_INTENT_PATCHES
502 it = file->private_data; /* XXX: compat macro */
503 file->private_data = NULL; /* prevent ll_local_open assertion */
506 fd = ll_file_data_get();
510 if (S_ISDIR(inode->i_mode)) {
511 spin_lock(&lli->lli_lock);
512 /* "lli->lli_opendir_pid != 0" means someone has set it.
513 * "lli->lli_sai != NULL" means the previous statahead has not
515 if (lli->lli_opendir_pid == 0 && lli->lli_sai == NULL) {
517 lli->lli_opendir_pid = cfs_curproc_pid();
518 lli->lli_opendir_key = fd;
519 } else if (unlikely(lli->lli_opendir_pid == cfs_curproc_pid())) {
520 /* Two cases for this:
521 * (1) The same process open such directory many times.
522 * (2) The old process opened the directory, and exited
523 * before its children processes. Then new process
524 * with the same pid opens such directory before the
525 * old process's children processes exit.
526 * Change the owner to the latest one. */
528 lli->lli_opendir_key = fd;
530 spin_unlock(&lli->lli_lock);
533 if (inode->i_sb->s_root == file->f_dentry) {
534 LUSTRE_FPRIVATE(file) = fd;
538 if (!it || !it->d.lustre.it_disposition) {
539 /* Convert f_flags into access mode. We cannot use file->f_mode,
540 * because everything but O_ACCMODE mask was stripped from
542 if ((oit.it_flags + 1) & O_ACCMODE)
544 if (file->f_flags & O_TRUNC)
545 oit.it_flags |= FMODE_WRITE;
547 /* kernel only call f_op->open in dentry_open. filp_open calls
548 * dentry_open after call to open_namei that checks permissions.
549 * Only nfsd_open call dentry_open directly without checking
550 * permissions and because of that this code below is safe. */
551 if (oit.it_flags & FMODE_WRITE)
552 oit.it_flags |= MDS_OPEN_OWNEROVERRIDE;
554 /* We do not want O_EXCL here, presumably we opened the file
555 * already? XXX - NFS implications? */
556 oit.it_flags &= ~O_EXCL;
562 /* Let's see if we have file open on MDS already. */
563 if (it->it_flags & FMODE_WRITE) {
564 och_p = &lli->lli_mds_write_och;
565 och_usecount = &lli->lli_open_fd_write_count;
566 } else if (it->it_flags & FMODE_EXEC) {
567 och_p = &lli->lli_mds_exec_och;
568 och_usecount = &lli->lli_open_fd_exec_count;
570 och_p = &lli->lli_mds_read_och;
571 och_usecount = &lli->lli_open_fd_read_count;
574 down(&lli->lli_och_sem);
575 if (*och_p) { /* Open handle is present */
576 if (it_disposition(it, DISP_OPEN_OPEN)) {
577 /* Well, there's extra open request that we do not need,
578 let's close it somehow. This will decref request. */
579 rc = it_open_error(DISP_OPEN_OPEN, it);
581 ll_file_data_put(fd);
582 GOTO(out_och_free, rc);
584 ll_release_openhandle(file->f_dentry, it);
585 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats,
590 rc = ll_local_open(file, it, fd, NULL);
592 up(&lli->lli_och_sem);
593 ll_file_data_put(fd);
597 LASSERT(*och_usecount == 0);
598 if (!it->d.lustre.it_disposition) {
599 /* We cannot just request lock handle now, new ELC code
600 means that one of other OPEN locks for this file
601 could be cancelled, and since blocking ast handler
602 would attempt to grab och_sem as well, that would
603 result in a deadlock */
604 up(&lli->lli_och_sem);
605 it->it_flags |= O_CHECK_STALE;
606 rc = ll_intent_file_open(file, NULL, 0, it);
607 it->it_flags &= ~O_CHECK_STALE;
609 ll_file_data_put(fd);
610 GOTO(out_openerr, rc);
613 /* Got some error? Release the request */
614 if (it->d.lustre.it_status < 0) {
615 req = it->d.lustre.it_data;
616 ptlrpc_req_finished(req);
618 md_set_lock_data(ll_i2sbi(inode)->ll_md_exp,
619 &it->d.lustre.it_lock_handle,
620 file->f_dentry->d_inode);
623 OBD_ALLOC(*och_p, sizeof (struct obd_client_handle));
625 ll_file_data_put(fd);
626 GOTO(out_och_free, rc = -ENOMEM);
629 req = it->d.lustre.it_data;
631 /* md_intent_lock() didn't get a request ref if there was an
632 * open error, so don't do cleanup on the request here
634 /* XXX (green): Should not we bail out on any error here, not
635 * just open error? */
636 rc = it_open_error(DISP_OPEN_OPEN, it);
638 ll_file_data_put(fd);
639 GOTO(out_och_free, rc);
642 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN, 1);
643 rc = ll_local_open(file, it, fd, *och_p);
645 up(&lli->lli_och_sem);
646 ll_file_data_put(fd);
647 GOTO(out_och_free, rc);
650 up(&lli->lli_och_sem);
652 /* Must do this outside lli_och_sem lock to prevent deadlock where
653 different kind of OPEN lock for this same inode gets cancelled
654 by ldlm_cancel_lru */
655 if (!S_ISREG(inode->i_mode))
662 if (file->f_flags & O_LOV_DELAY_CREATE ||
663 !(file->f_mode & FMODE_WRITE)) {
664 CDEBUG(D_INODE, "object creation was delayed\n");
668 file->f_flags &= ~O_LOV_DELAY_CREATE;
671 ptlrpc_req_finished(req);
673 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
677 OBD_FREE(*och_p, sizeof (struct obd_client_handle));
678 *och_p = NULL; /* OBD_FREE writes some magic there */
681 up(&lli->lli_och_sem);
683 if (opendir_set == 1) {
684 lli->lli_opendir_key = NULL;
685 lli->lli_opendir_pid = 0;
686 } else if (unlikely(opendir_set == 2)) {
687 ll_stop_statahead(inode, fd);
694 /* Fills the obdo with the attributes for the inode defined by lsm */
695 int ll_inode_getattr(struct inode *inode, struct obdo *obdo)
697 struct ptlrpc_request_set *set;
698 struct ll_inode_info *lli = ll_i2info(inode);
699 struct lov_stripe_md *lsm = lli->lli_smd;
701 struct obd_info oinfo = { { { 0 } } };
705 LASSERT(lsm != NULL);
709 oinfo.oi_oa->o_id = lsm->lsm_object_id;
710 oinfo.oi_oa->o_gr = lsm->lsm_object_gr;
711 oinfo.oi_oa->o_mode = S_IFREG;
712 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE |
713 OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
714 OBD_MD_FLBLKSZ | OBD_MD_FLATIME |
715 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
717 oinfo.oi_capa = ll_mdscapa_get(inode);
719 set = ptlrpc_prep_set();
721 CERROR("can't allocate ptlrpc set\n");
724 rc = obd_getattr_async(ll_i2dtexp(inode), &oinfo, set);
726 rc = ptlrpc_set_wait(set);
727 ptlrpc_set_destroy(set);
729 capa_put(oinfo.oi_capa);
733 oinfo.oi_oa->o_valid &= (OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ |
734 OBD_MD_FLATIME | OBD_MD_FLMTIME |
735 OBD_MD_FLCTIME | OBD_MD_FLSIZE);
737 obdo_refresh_inode(inode, oinfo.oi_oa, oinfo.oi_oa->o_valid);
738 CDEBUG(D_INODE, "objid "LPX64" size %Lu, blocks %llu, blksize %lu\n",
739 lli->lli_smd->lsm_object_id, i_size_read(inode),
740 (unsigned long long)inode->i_blocks,
741 (unsigned long)ll_inode_blksize(inode));
745 static int ll_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
747 struct ll_inode_info *lli = ll_i2info(inode);
748 struct lov_stripe_md *lsm = lli->lli_smd;
749 struct obd_export *exp = ll_i2dtexp(inode);
752 struct ldlm_lock *lock;
753 struct lov_stripe_md *lsm;
754 } key = { .name = KEY_LOCK_TO_STRIPE, .lock = lock, .lsm = lsm };
755 __u32 stripe, vallen = sizeof(stripe);
756 struct lov_oinfo *loinfo;
760 if (lsm->lsm_stripe_count == 1)
761 GOTO(check, stripe = 0);
763 /* get our offset in the lov */
764 rc = obd_get_info(exp, sizeof(key), &key, &vallen, &stripe);
766 CERROR("obd_get_info: rc = %d\n", rc);
769 LASSERT(stripe < lsm->lsm_stripe_count);
772 loinfo = lsm->lsm_oinfo[stripe];
773 if (!osc_res_name_eq(loinfo->loi_id, loinfo->loi_gr,
774 &lock->l_resource->lr_name)){
775 LDLM_ERROR(lock, "resource doesn't match object "LPU64"/"LPU64,
776 loinfo->loi_id, loinfo->loi_gr);
777 RETURN(-ELDLM_NO_LOCK_DATA);
783 /* Get extra page reference to ensure it is not going away */
784 void ll_pin_extent_cb(void *data)
786 struct page *page = data;
788 page_cache_get(page);
793 /* Flush the page from page cache for an extent as its canceled.
794 * Page to remove is delivered as @data.
796 * No one can dirty the extent until we've finished our work and they cannot
797 * enqueue another lock. The DLM protects us from ll_file_read/write here,
798 * but other kernel actors could have pages locked.
800 * If @discard is set, there is no need to write the page if it is dirty.
802 * Called with the DLM lock held. */
803 int ll_page_removal_cb(void *data, int discard)
806 struct page *page = data;
807 struct address_space *mapping;
811 /* We have page reference already from ll_pin_page */
814 /* Already truncated by somebody */
817 mapping = page->mapping;
819 ll_teardown_mmaps(mapping,
820 (__u64)page->index << PAGE_CACHE_SHIFT,
821 ((__u64)page->index<<PAGE_CACHE_SHIFT)|
823 LL_CDEBUG_PAGE(D_PAGE, page, "removing page\n");
825 if (!discard && clear_page_dirty_for_io(page)) {
826 LASSERT(page->mapping);
827 rc = ll_call_writepage(page->mapping->host, page);
828 /* either waiting for io to complete or reacquiring
829 * the lock that the failed writepage released */
831 wait_on_page_writeback(page);
833 CERROR("writepage inode %lu(%p) of page %p "
834 "failed: %d\n", mapping->host->i_ino,
835 mapping->host, page, rc);
837 set_bit(AS_ENOSPC, &mapping->flags);
839 set_bit(AS_EIO, &mapping->flags);
841 set_bit(AS_EIO, &mapping->flags);
843 if (page->mapping != NULL) {
844 struct ll_async_page *llap = llap_cast_private(page);
845 /* checking again to account for writeback's lock_page() */
846 LL_CDEBUG_PAGE(D_PAGE, page, "truncating\n");
848 ll_ra_accounting(llap, page->mapping);
849 ll_truncate_complete_page(page);
853 LASSERT(!PageWriteback(page));
855 page_cache_release(page);
860 int ll_extent_lock_cancel_cb(struct ldlm_lock *lock, struct ldlm_lock_desc *new,
861 void *data, int flag)
864 struct ll_inode_info *lli;
865 struct lov_stripe_md *lsm;
871 if ((unsigned long)data > 0 && (unsigned long)data < 0x1000) {
872 LDLM_ERROR(lock, "cancelling lock with bad data %p", data);
876 inode = ll_inode_from_lock(lock);
879 lli = ll_i2info(inode);
882 if (lli->lli_smd == NULL)
886 stripe = ll_lock_to_stripe_offset(inode, lock);
890 lov_stripe_lock(lsm);
891 lock_res_and_lock(lock);
892 kms = ldlm_extent_shift_kms(lock,
893 lsm->lsm_oinfo[stripe]->loi_kms);
895 if (lsm->lsm_oinfo[stripe]->loi_kms != kms)
896 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
897 lsm->lsm_oinfo[stripe]->loi_kms, kms);
898 lsm->lsm_oinfo[stripe]->loi_kms = kms;
899 unlock_res_and_lock(lock);
900 lov_stripe_unlock(lsm);
901 ll_queue_done_writing(inode, 0);
910 int ll_async_completion_ast(struct ldlm_lock *lock, int flags, void *data)
912 /* XXX ALLOCATE - 160 bytes */
913 struct inode *inode = ll_inode_from_lock(lock);
914 struct ll_inode_info *lli = ll_i2info(inode);
915 struct lustre_handle lockh = { 0 };
920 if (flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
921 LDLM_FL_BLOCK_CONV)) {
922 LBUG(); /* not expecting any blocked async locks yet */
923 LDLM_DEBUG(lock, "client-side async enqueue returned a blocked "
925 ldlm_lock_dump(D_OTHER, lock, 0);
926 ldlm_reprocess_all(lock->l_resource);
930 LDLM_DEBUG(lock, "client-side async enqueue: granted/glimpsed");
932 stripe = ll_lock_to_stripe_offset(inode, lock);
936 if (lock->l_lvb_len) {
937 struct lov_stripe_md *lsm = lli->lli_smd;
939 lvb = lock->l_lvb_data;
940 lsm->lsm_oinfo[stripe].loi_rss = lvb->lvb_size;
942 lock_res_and_lock(lock);
943 ll_inode_size_lock(inode, 1);
944 kms = MAX(lsm->lsm_oinfo[stripe].loi_kms, lvb->lvb_size);
945 kms = ldlm_extent_shift_kms(NULL, kms);
946 if (lsm->lsm_oinfo[stripe].loi_kms != kms)
947 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
948 lsm->lsm_oinfo[stripe].loi_kms, kms);
949 lsm->lsm_oinfo[stripe].loi_kms = kms;
950 ll_inode_size_unlock(inode, 1);
951 unlock_res_and_lock(lock);
956 wake_up(&lock->l_waitq);
958 ldlm_lock2handle(lock, &lockh);
959 ldlm_lock_decref(&lockh, LCK_PR);
964 static int ll_glimpse_callback(struct ldlm_lock *lock, void *reqp)
966 struct ptlrpc_request *req = reqp;
967 struct inode *inode = ll_inode_from_lock(lock);
968 struct ll_inode_info *lli;
969 struct lov_stripe_md *lsm;
975 GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
976 lli = ll_i2info(inode);
978 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
981 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
983 /* First, find out which stripe index this lock corresponds to. */
984 stripe = ll_lock_to_stripe_offset(inode, lock);
986 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
988 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
989 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
991 rc = req_capsule_server_pack(&req->rq_pill);
993 CERROR("lustre_pack_reply: %d\n", rc);
997 lvb = req_capsule_server_get(&req->rq_pill, &RMF_DLM_LVB);
998 lvb->lvb_size = lli->lli_smd->lsm_oinfo[stripe]->loi_kms;
999 lvb->lvb_mtime = LTIME_S(inode->i_mtime);
1000 lvb->lvb_atime = LTIME_S(inode->i_atime);
1001 lvb->lvb_ctime = LTIME_S(inode->i_ctime);
1003 LDLM_DEBUG(lock, "i_size: %llu -> stripe number %u -> kms "LPU64
1004 " atime "LPU64", mtime "LPU64", ctime "LPU64,
1005 i_size_read(inode), stripe, lvb->lvb_size, lvb->lvb_mtime,
1006 lvb->lvb_atime, lvb->lvb_ctime);
1011 /* These errors are normal races, so we don't want to fill the console
1012 * with messages by calling ptlrpc_error() */
1013 if (rc == -ELDLM_NO_LOCK_DATA)
1014 lustre_pack_reply(req, 1, NULL, NULL);
1016 req->rq_status = rc;
1020 static int ll_merge_lvb(struct inode *inode)
1022 struct ll_inode_info *lli = ll_i2info(inode);
1023 struct ll_sb_info *sbi = ll_i2sbi(inode);
1029 ll_inode_size_lock(inode, 1);
1030 inode_init_lvb(inode, &lvb);
1031 rc = obd_merge_lvb(sbi->ll_dt_exp, lli->lli_smd, &lvb, 0);
1032 i_size_write(inode, lvb.lvb_size);
1033 inode->i_blocks = lvb.lvb_blocks;
1035 LTIME_S(inode->i_mtime) = lvb.lvb_mtime;
1036 LTIME_S(inode->i_atime) = lvb.lvb_atime;
1037 LTIME_S(inode->i_ctime) = lvb.lvb_ctime;
1038 ll_inode_size_unlock(inode, 1);
1043 int ll_local_size(struct inode *inode)
1045 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
1046 struct ll_inode_info *lli = ll_i2info(inode);
1047 struct ll_sb_info *sbi = ll_i2sbi(inode);
1048 struct lustre_handle lockh = { 0 };
1053 if (lli->lli_smd->lsm_stripe_count == 0)
1056 rc = obd_match(sbi->ll_dt_exp, lli->lli_smd, LDLM_EXTENT,
1057 &policy, LCK_PR, &flags, inode, &lockh);
1063 rc = ll_merge_lvb(inode);
1064 obd_cancel(sbi->ll_dt_exp, lli->lli_smd, LCK_PR, &lockh);
1068 int ll_glimpse_ioctl(struct ll_sb_info *sbi, struct lov_stripe_md *lsm,
1071 struct lustre_handle lockh = { 0 };
1072 struct ldlm_enqueue_info einfo = { 0 };
1073 struct obd_info oinfo = { { { 0 } } };
1079 einfo.ei_type = LDLM_EXTENT;
1080 einfo.ei_mode = LCK_PR;
1081 einfo.ei_cb_bl = osc_extent_blocking_cb;
1082 einfo.ei_cb_cp = ldlm_completion_ast;
1083 einfo.ei_cb_gl = ll_glimpse_callback;
1084 einfo.ei_cbdata = NULL;
1086 oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
1087 oinfo.oi_lockh = &lockh;
1089 oinfo.oi_flags = LDLM_FL_HAS_INTENT;
1091 rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
1095 CERROR("obd_enqueue returned rc %d, "
1096 "returning -EIO\n", rc);
1097 RETURN(rc > 0 ? -EIO : rc);
1100 lov_stripe_lock(lsm);
1101 memset(&lvb, 0, sizeof(lvb));
1102 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 0);
1103 st->st_size = lvb.lvb_size;
1104 st->st_blocks = lvb.lvb_blocks;
1105 st->st_mtime = lvb.lvb_mtime;
1106 st->st_atime = lvb.lvb_atime;
1107 st->st_ctime = lvb.lvb_ctime;
1108 lov_stripe_unlock(lsm);
1113 /* NB: obd_merge_lvb will prefer locally cached writes if they extend the
1114 * file (because it prefers KMS over RSS when larger) */
1115 int ll_glimpse_size(struct inode *inode, int ast_flags)
1117 struct ll_inode_info *lli = ll_i2info(inode);
1118 struct ll_sb_info *sbi = ll_i2sbi(inode);
1119 struct lustre_handle lockh = { 0 };
1120 struct ldlm_enqueue_info einfo = { 0 };
1121 struct obd_info oinfo = { { { 0 } } };
1125 if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
1128 CDEBUG(D_DLMTRACE, "Glimpsing inode %lu\n", inode->i_ino);
1130 if (!lli->lli_smd) {
1131 CDEBUG(D_DLMTRACE, "No objects for inode %lu\n", inode->i_ino);
1135 /* NOTE: this looks like DLM lock request, but it may not be one. Due
1136 * to LDLM_FL_HAS_INTENT flag, this is glimpse request, that
1137 * won't revoke any conflicting DLM locks held. Instead,
1138 * ll_glimpse_callback() will be called on each client
1139 * holding a DLM lock against this file, and resulting size
1140 * will be returned for each stripe. DLM lock on [0, EOF] is
1141 * acquired only if there were no conflicting locks. */
1142 einfo.ei_type = LDLM_EXTENT;
1143 einfo.ei_mode = LCK_PR;
1144 einfo.ei_cb_bl = osc_extent_blocking_cb;
1145 einfo.ei_cb_cp = ldlm_completion_ast;
1146 einfo.ei_cb_gl = ll_glimpse_callback;
1147 einfo.ei_cbdata = inode;
1149 oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
1150 oinfo.oi_lockh = &lockh;
1151 oinfo.oi_md = lli->lli_smd;
1152 oinfo.oi_flags = ast_flags | LDLM_FL_HAS_INTENT;
1154 rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
1158 CERROR("obd_enqueue returned rc %d, returning -EIO\n", rc);
1159 RETURN(rc > 0 ? -EIO : rc);
1162 rc = ll_merge_lvb(inode);
1164 CDEBUG(D_DLMTRACE, "glimpse: size: %llu, blocks: %llu\n",
1165 i_size_read(inode), (unsigned long long)inode->i_blocks);
1170 int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
1171 struct lov_stripe_md *lsm, int mode,
1172 ldlm_policy_data_t *policy, struct lustre_handle *lockh,
1175 struct ll_sb_info *sbi = ll_i2sbi(inode);
1177 struct ldlm_enqueue_info einfo = { 0 };
1178 struct obd_info oinfo = { { { 0 } } };
1182 LASSERT(!lustre_handle_is_used(lockh));
1183 LASSERT(lsm != NULL);
1185 /* don't drop the mmapped file to LRU */
1186 if (mapping_mapped(inode->i_mapping))
1187 ast_flags |= LDLM_FL_NO_LRU;
1189 /* XXX phil: can we do this? won't it screw the file size up? */
1190 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
1191 (sbi->ll_flags & LL_SBI_NOLCK))
1194 CDEBUG(D_DLMTRACE, "Locking inode %lu, start "LPU64" end "LPU64"\n",
1195 inode->i_ino, policy->l_extent.start, policy->l_extent.end);
1197 einfo.ei_type = LDLM_EXTENT;
1198 einfo.ei_mode = mode;
1199 einfo.ei_cb_bl = osc_extent_blocking_cb;
1200 einfo.ei_cb_cp = ldlm_completion_ast;
1201 einfo.ei_cb_gl = ll_glimpse_callback;
1202 einfo.ei_cbdata = inode;
1204 oinfo.oi_policy = *policy;
1205 oinfo.oi_lockh = lockh;
1207 oinfo.oi_flags = ast_flags;
1209 rc = obd_enqueue(sbi->ll_dt_exp, &oinfo, &einfo, NULL);
1210 *policy = oinfo.oi_policy;
1214 ll_inode_size_lock(inode, 1);
1215 inode_init_lvb(inode, &lvb);
1216 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
1218 if (policy->l_extent.start == 0 &&
1219 policy->l_extent.end == OBD_OBJECT_EOF) {
1220 /* vmtruncate()->ll_truncate() first sets the i_size and then
1221 * the kms under both a DLM lock and the
1222 * ll_inode_size_lock(). If we don't get the
1223 * ll_inode_size_lock() here we can match the DLM lock and
1224 * reset i_size from the kms before the truncating path has
1225 * updated the kms. generic_file_write can then trust the
1226 * stale i_size when doing appending writes and effectively
1227 * cancel the result of the truncate. Getting the
1228 * ll_inode_size_lock() after the enqueue maintains the DLM
1229 * -> ll_inode_size_lock() acquiring order. */
1230 i_size_write(inode, lvb.lvb_size);
1231 CDEBUG(D_INODE, "inode=%lu, updating i_size %llu\n",
1232 inode->i_ino, i_size_read(inode));
1236 LTIME_S(inode->i_mtime) = lvb.lvb_mtime;
1237 LTIME_S(inode->i_atime) = lvb.lvb_atime;
1238 LTIME_S(inode->i_ctime) = lvb.lvb_ctime;
1240 ll_inode_size_unlock(inode, 1);
1245 int ll_extent_unlock(struct ll_file_data *fd, struct inode *inode,
1246 struct lov_stripe_md *lsm, int mode,
1247 struct lustre_handle *lockh)
1249 struct ll_sb_info *sbi = ll_i2sbi(inode);
1253 /* XXX phil: can we do this? won't it screw the file size up? */
1254 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
1255 (sbi->ll_flags & LL_SBI_NOLCK))
1258 rc = obd_cancel(sbi->ll_dt_exp, lsm, mode, lockh);
1263 static void ll_set_file_contended(struct inode *inode)
1265 struct ll_inode_info *lli = ll_i2info(inode);
1266 cfs_time_t now = cfs_time_current();
1268 spin_lock(&lli->lli_lock);
1269 lli->lli_contention_time = now;
1270 lli->lli_flags |= LLIF_CONTENDED;
1271 spin_unlock(&lli->lli_lock);
1274 void ll_clear_file_contended(struct inode *inode)
1276 struct ll_inode_info *lli = ll_i2info(inode);
1278 spin_lock(&lli->lli_lock);
1279 lli->lli_flags &= ~LLIF_CONTENDED;
1280 spin_unlock(&lli->lli_lock);
1283 static int ll_is_file_contended(struct file *file)
1285 struct inode *inode = file->f_dentry->d_inode;
1286 struct ll_inode_info *lli = ll_i2info(inode);
1287 struct ll_sb_info *sbi = ll_i2sbi(inode);
1288 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1291 if (!(sbi->ll_lco.lco_flags & OBD_CONNECT_SRVLOCK)) {
1292 CDEBUG(D_INFO, "the server does not support SRVLOCK feature,"
1293 " osc connect flags = 0x"LPX64"\n",
1294 sbi->ll_lco.lco_flags);
1297 if (fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK))
1299 if (lli->lli_flags & LLIF_CONTENDED) {
1300 cfs_time_t cur_time = cfs_time_current();
1301 cfs_time_t retry_time;
1303 retry_time = cfs_time_add(
1304 lli->lli_contention_time,
1305 cfs_time_seconds(sbi->ll_contention_time));
1306 if (cfs_time_after(cur_time, retry_time)) {
1307 ll_clear_file_contended(inode);
1315 static int ll_file_get_tree_lock(struct ll_lock_tree *tree, struct file *file,
1316 const char *buf, size_t count,
1317 loff_t start, loff_t end, int rw)
1320 int tree_locked = 0;
1322 struct inode * inode = file->f_dentry->d_inode;
1325 append = (rw == OBD_BRW_WRITE) && (file->f_flags & O_APPEND);
1327 if (append || !ll_is_file_contended(file)) {
1328 struct ll_lock_tree_node *node;
1331 ast_flags = append ? 0 : LDLM_FL_DENY_ON_CONTENTION;
1332 if (file->f_flags & O_NONBLOCK)
1333 ast_flags |= LDLM_FL_BLOCK_NOWAIT;
1334 node = ll_node_from_inode(inode, start, end,
1335 (rw == OBD_BRW_WRITE) ? LCK_PW : LCK_PR);
1340 tree->lt_fd = LUSTRE_FPRIVATE(file);
1341 rc = ll_tree_lock(tree, node, buf, count, ast_flags);
1344 else if (rc == -EUSERS)
1345 ll_set_file_contended(inode);
1349 RETURN(tree_locked);
1355 * Checks if requested extent lock is compatible with a lock under a page.
1357 * Checks if the lock under \a page is compatible with a read or write lock
1358 * (specified by \a rw) for an extent [\a start , \a end].
1360 * \param page the page under which lock is considered
1361 * \param rw OBD_BRW_READ if requested for reading,
1362 * OBD_BRW_WRITE if requested for writing
1363 * \param start start of the requested extent
1364 * \param end end of the requested extent
1365 * \param cookie transparent parameter for passing locking context
1367 * \post result == 1, *cookie == context, appropriate lock is referenced or
1370 * \retval 1 owned lock is reused for the request
1371 * \retval 0 no lock reused for the request
1373 * \see ll_release_short_lock
1375 static int ll_reget_short_lock(struct page *page, int rw,
1376 obd_off start, obd_off end,
1379 struct ll_async_page *llap;
1380 struct obd_export *exp;
1381 struct inode *inode = page->mapping->host;
1385 exp = ll_i2dtexp(inode);
1389 llap = llap_cast_private(page);
1393 RETURN(obd_reget_short_lock(exp, ll_i2info(inode)->lli_smd,
1394 &llap->llap_cookie, rw, start, end,
1399 * Releases a reference to a lock taken in a "fast" way.
1401 * Releases a read or a write (specified by \a rw) lock
1402 * referenced by \a cookie.
1404 * \param inode inode to which data belong
1405 * \param end end of the locked extent
1406 * \param rw OBD_BRW_READ if requested for reading,
1407 * OBD_BRW_WRITE if requested for writing
1408 * \param cookie transparent parameter for passing locking context
1410 * \post appropriate lock is dereferenced
1412 * \see ll_reget_short_lock
1414 static void ll_release_short_lock(struct inode *inode, obd_off end,
1415 void *cookie, int rw)
1417 struct obd_export *exp;
1420 exp = ll_i2dtexp(inode);
1424 rc = obd_release_short_lock(exp, ll_i2info(inode)->lli_smd, end,
1427 CERROR("unlock failed (%d)\n", rc);
1431 * Checks if requested extent lock is compatible
1432 * with a lock under a page in page cache.
1434 * Checks if a lock under some \a page is compatible with a read or write lock
1435 * (specified by \a rw) for an extent [\a start , \a end].
1437 * \param file the file under which lock is considered
1438 * \param rw OBD_BRW_READ if requested for reading,
1439 * OBD_BRW_WRITE if requested for writing
1440 * \param ppos start of the requested extent
1441 * \param end end of the requested extent
1442 * \param cookie transparent parameter for passing locking context
1443 * \param buf userspace buffer for the data
1445 * \post result == 1, *cookie == context, appropriate lock is referenced
1448 * \retval 1 owned lock is reused for the request
1449 * \retval 0 no lock reused for the request
1451 * \see ll_file_put_fast_lock
1453 static inline int ll_file_get_fast_lock(struct file *file,
1454 obd_off ppos, obd_off end,
1455 char *buf, void **cookie, int rw)
1462 if (!ll_region_mapped((unsigned long)buf, end - ppos)) {
1463 page = find_lock_page(file->f_dentry->d_inode->i_mapping,
1464 ppos >> CFS_PAGE_SHIFT);
1466 if (ll_reget_short_lock(page, rw, ppos, end, cookie))
1470 page_cache_release(page);
1478 * Releases a reference to a lock taken in a "fast" way.
1480 * Releases a read or a write (specified by \a rw) lock
1481 * referenced by \a cookie.
1483 * \param inode inode to which data belong
1484 * \param end end of the locked extent
1485 * \param rw OBD_BRW_READ if requested for reading,
1486 * OBD_BRW_WRITE if requested for writing
1487 * \param cookie transparent parameter for passing locking context
1489 * \post appropriate lock is dereferenced
1491 * \see ll_file_get_fast_lock
1493 static inline void ll_file_put_fast_lock(struct inode *inode, obd_off end,
1494 void *cookie, int rw)
1496 ll_release_short_lock(inode, end, cookie, rw);
1499 enum ll_lock_style {
1500 LL_LOCK_STYLE_NOLOCK = 0,
1501 LL_LOCK_STYLE_FASTLOCK = 1,
1502 LL_LOCK_STYLE_TREELOCK = 2
1506 * Checks if requested extent lock is compatible with a lock
1507 * under a page cache page.
1509 * Checks if the lock under \a page is compatible with a read or write lock
1510 * (specified by \a rw) for an extent [\a start , \a end].
1512 * \param file file under which I/O is processed
1513 * \param rw OBD_BRW_READ if requested for reading,
1514 * OBD_BRW_WRITE if requested for writing
1515 * \param ppos start of the requested extent
1516 * \param end end of the requested extent
1517 * \param cookie transparent parameter for passing locking context
1518 * (only used with LL_LOCK_STYLE_FASTLOCK)
1519 * \param tree lock tree (only used with LL_LOCK_STYLE_TREELOCK)
1520 * \param buf userspace buffer for the data
1522 * \retval LL_LOCK_STYLE_FASTLOCK owned lock is reused through fast lock
1523 * \retval LL_LOCK_STYLE_TREELOCK got a lock through tree lock
1524 * \retval LL_LOCK_STYLE_NOLOCK got no lock
1526 * \see ll_file_put_lock
1528 static inline int ll_file_get_lock(struct file *file, obd_off ppos,
1529 obd_off end, char *buf, void **cookie,
1530 struct ll_lock_tree *tree, int rw)
1536 if (ll_file_get_fast_lock(file, ppos, end, buf, cookie, rw))
1537 RETURN(LL_LOCK_STYLE_FASTLOCK);
1539 rc = ll_file_get_tree_lock(tree, file, buf, ppos - end, ppos, end, rw);
1540 /* rc: 1 for tree lock, 0 for no lock, <0 for error */
1543 RETURN(LL_LOCK_STYLE_TREELOCK);
1545 RETURN(LL_LOCK_STYLE_NOLOCK);
1548 /* an error happened if we reached this point, rc = -errno here */
1553 * Drops the lock taken by ll_file_get_lock.
1555 * Releases a read or a write (specified by \a rw) lock
1556 * referenced by \a tree or \a cookie.
1558 * \param inode inode to which data belong
1559 * \param end end of the locked extent
1560 * \param lockstyle facility through which the lock was taken
1561 * \param rw OBD_BRW_READ if requested for reading,
1562 * OBD_BRW_WRITE if requested for writing
1563 * \param cookie transparent parameter for passing locking context
1564 * (only used with LL_LOCK_STYLE_FASTLOCK)
1565 * \param tree lock tree (only used with LL_LOCK_STYLE_TREELOCK)
1567 * \post appropriate lock is dereferenced
1569 * \see ll_file_get_lock
1571 static inline void ll_file_put_lock(struct inode *inode, obd_off end,
1572 enum ll_lock_style lock_style,
1573 void *cookie, struct ll_lock_tree *tree,
1577 switch (lock_style) {
1578 case LL_LOCK_STYLE_TREELOCK:
1579 ll_tree_unlock(tree);
1581 case LL_LOCK_STYLE_FASTLOCK:
1582 ll_file_put_fast_lock(inode, end, cookie, rw);
1585 CERROR("invalid locking style (%d)\n", lock_style);
1589 static ssize_t ll_file_read(struct file *file, char *buf, size_t count,
1592 struct inode *inode = file->f_dentry->d_inode;
1593 struct ll_inode_info *lli = ll_i2info(inode);
1594 struct lov_stripe_md *lsm = lli->lli_smd;
1595 struct ll_sb_info *sbi = ll_i2sbi(inode);
1596 struct ll_lock_tree tree;
1598 struct ll_ra_read bead;
1601 ssize_t retval, chunk, sum = 0;
1607 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1608 inode->i_ino, inode->i_generation, inode, count, *ppos);
1609 /* "If nbyte is 0, read() will return 0 and have no other results."
1610 * -- Single Unix Spec */
1614 ll_stats_ops_tally(sbi, LPROC_LL_READ_BYTES, count);
1617 /* Read on file with no objects should return zero-filled
1618 * buffers up to file size (we can get non-zero sizes with
1619 * mknod + truncate, then opening file for read. This is a
1620 * common pattern in NFS case, it seems). Bug 6243 */
1622 /* Since there are no objects on OSTs, we have nothing to get
1623 * lock on and so we are forced to access inode->i_size
1626 /* Read beyond end of file */
1627 if (*ppos >= i_size_read(inode))
1630 if (count > i_size_read(inode) - *ppos)
1631 count = i_size_read(inode) - *ppos;
1632 /* Make sure to correctly adjust the file pos pointer for
1634 notzeroed = clear_user(buf, count);
1642 if (sbi->ll_max_rw_chunk != 0) {
1643 /* first, let's know the end of the current stripe */
1645 obd_extent_calc(sbi->ll_dt_exp, lsm, OBD_CALC_STRIPE_END, &end);
1647 /* correct, the end is beyond the request */
1648 if (end > *ppos + count - 1)
1649 end = *ppos + count - 1;
1651 /* and chunk shouldn't be too large even if striping is wide */
1652 if (end - *ppos > sbi->ll_max_rw_chunk)
1653 end = *ppos + sbi->ll_max_rw_chunk - 1;
1655 end = *ppos + count - 1;
1658 lock_style = ll_file_get_lock(file, (obd_off)(*ppos), end,
1659 buf, &cookie, &tree, OBD_BRW_READ);
1661 GOTO(out, retval = lock_style);
1663 ll_inode_size_lock(inode, 1);
1665 * Consistency guarantees: following possibilities exist for the
1666 * relation between region being read and real file size at this
1669 * (A): the region is completely inside of the file;
1671 * (B-x): x bytes of region are inside of the file, the rest is
1674 * (C): the region is completely outside of the file.
1676 * This classification is stable under DLM lock acquired by
1677 * ll_tree_lock() above, because to change class, other client has to
1678 * take DLM lock conflicting with our lock. Also, any updates to
1679 * ->i_size by other threads on this client are serialized by
1680 * ll_inode_size_lock(). This guarantees that short reads are handled
1681 * correctly in the face of concurrent writes and truncates.
1683 inode_init_lvb(inode, &lvb);
1684 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
1686 if (*ppos + count - 1 > kms) {
1687 /* A glimpse is necessary to determine whether we return a
1688 * short read (B) or some zeroes at the end of the buffer (C) */
1689 ll_inode_size_unlock(inode, 1);
1690 retval = ll_glimpse_size(inode, LDLM_FL_BLOCK_GRANTED);
1692 if (lock_style != LL_LOCK_STYLE_NOLOCK)
1693 ll_file_put_lock(inode, end, lock_style,
1694 cookie, &tree, OBD_BRW_READ);
1698 /* region is within kms and, hence, within real file size (A).
1699 * We need to increase i_size to cover the read region so that
1700 * generic_file_read() will do its job, but that doesn't mean
1701 * the kms size is _correct_, it is only the _minimum_ size.
1702 * If someone does a stat they will get the correct size which
1703 * will always be >= the kms value here. b=11081 */
1704 if (i_size_read(inode) < kms)
1705 i_size_write(inode, kms);
1706 ll_inode_size_unlock(inode, 1);
1709 chunk = end - *ppos + 1;
1710 CDEBUG(D_INODE, "Read ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
1711 inode->i_ino, chunk, *ppos, i_size_read(inode));
1713 if (lock_style != LL_LOCK_STYLE_NOLOCK) {
1714 /* turn off the kernel's read-ahead */
1715 file->f_ra.ra_pages = 0;
1717 /* initialize read-ahead window once per syscall */
1720 bead.lrr_start = *ppos >> CFS_PAGE_SHIFT;
1721 bead.lrr_count = (count + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
1722 ll_ra_read_in(file, &bead);
1726 file_accessed(file);
1727 retval = generic_file_read(file, buf, chunk, ppos);
1728 ll_file_put_lock(inode, end, lock_style, cookie, &tree,
1731 retval = ll_file_lockless_io(file, buf, chunk, ppos, READ);
1734 ll_rw_stats_tally(sbi, current->pid, file, chunk, 0);
1740 if (retval == chunk && count > 0)
1746 ll_ra_read_ex(file, &bead);
1747 retval = (sum > 0) ? sum : retval;
1752 * Write to a file (through the page cache).
1754 static ssize_t ll_file_write(struct file *file, const char *buf, size_t count,
1757 struct inode *inode = file->f_dentry->d_inode;
1758 struct ll_sb_info *sbi = ll_i2sbi(inode);
1759 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1760 struct ll_lock_tree tree;
1761 loff_t maxbytes = ll_file_maxbytes(inode);
1762 loff_t lock_start, lock_end, end;
1763 ssize_t retval, chunk, sum = 0;
1767 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1768 inode->i_ino, inode->i_generation, inode, count, *ppos);
1770 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1772 /* POSIX, but surprised the VFS doesn't check this already */
1776 /* If file was opened for LL_IOC_LOV_SETSTRIPE but the ioctl wasn't
1777 * called on the file, don't fail the below assertion (bug 2388). */
1778 if (file->f_flags & O_LOV_DELAY_CREATE &&
1779 ll_i2info(inode)->lli_smd == NULL)
1782 LASSERT(ll_i2info(inode)->lli_smd != NULL);
1784 down(&ll_i2info(inode)->lli_write_sem);
1787 chunk = 0; /* just to fix gcc's warning */
1788 end = *ppos + count - 1;
1790 if (file->f_flags & O_APPEND) {
1792 lock_end = OBD_OBJECT_EOF;
1793 } else if (sbi->ll_max_rw_chunk != 0) {
1794 /* first, let's know the end of the current stripe */
1796 obd_extent_calc(sbi->ll_dt_exp, lsm, OBD_CALC_STRIPE_END,
1799 /* correct, the end is beyond the request */
1800 if (end > *ppos + count - 1)
1801 end = *ppos + count - 1;
1803 /* and chunk shouldn't be too large even if striping is wide */
1804 if (end - *ppos > sbi->ll_max_rw_chunk)
1805 end = *ppos + sbi->ll_max_rw_chunk - 1;
1810 lock_end = *ppos + count - 1;
1813 tree_locked = ll_file_get_tree_lock(&tree, file, buf, count,
1814 lock_start, lock_end, OBD_BRW_WRITE);
1815 if (tree_locked < 0)
1816 GOTO(out, retval = tree_locked);
1818 /* This is ok, g_f_w will overwrite this under i_sem if it races
1819 * with a local truncate, it just makes our maxbyte checking easier.
1820 * The i_size value gets updated in ll_extent_lock() as a consequence
1821 * of the [0,EOF] extent lock we requested above. */
1822 if (file->f_flags & O_APPEND) {
1823 *ppos = i_size_read(inode);
1824 end = *ppos + count - 1;
1827 if (*ppos >= maxbytes) {
1828 send_sig(SIGXFSZ, current, 0);
1829 GOTO(out_unlock, retval = -EFBIG);
1831 if (end > maxbytes - 1)
1834 /* generic_file_write handles O_APPEND after getting i_mutex */
1835 chunk = end - *ppos + 1;
1836 CDEBUG(D_INFO, "Writing inode %lu, "LPSZ" bytes, offset %Lu\n",
1837 inode->i_ino, chunk, *ppos);
1839 retval = generic_file_write(file, buf, chunk, ppos);
1841 retval = ll_file_lockless_io(file, (char*)buf, chunk,
1843 ll_rw_stats_tally(ll_i2sbi(inode), current->pid, file, chunk, 1);
1847 ll_tree_unlock(&tree);
1854 if (retval == chunk && count > 0)
1858 up(&ll_i2info(inode)->lli_write_sem);
1860 retval = (sum > 0) ? sum : retval;
1861 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_WRITE_BYTES,
1862 retval > 0 ? retval : 0);
1867 * Send file content (through pagecache) somewhere with helper
1869 static ssize_t ll_file_sendfile(struct file *in_file, loff_t *ppos,size_t count,
1870 read_actor_t actor, void *target)
1872 struct inode *inode = in_file->f_dentry->d_inode;
1873 struct ll_inode_info *lli = ll_i2info(inode);
1874 struct lov_stripe_md *lsm = lli->lli_smd;
1875 struct ll_lock_tree tree;
1876 struct ll_lock_tree_node *node;
1878 struct ll_ra_read bead;
1883 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1884 inode->i_ino, inode->i_generation, inode, count, *ppos);
1886 /* "If nbyte is 0, read() will return 0 and have no other results."
1887 * -- Single Unix Spec */
1891 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_READ_BYTES, count);
1892 /* turn off the kernel's read-ahead */
1893 in_file->f_ra.ra_pages = 0;
1895 /* File with no objects, nothing to lock */
1897 RETURN(generic_file_sendfile(in_file, ppos, count, actor, target));
1899 node = ll_node_from_inode(inode, *ppos, *ppos + count - 1, LCK_PR);
1901 RETURN(PTR_ERR(node));
1903 tree.lt_fd = LUSTRE_FPRIVATE(in_file);
1904 rc = ll_tree_lock(&tree, node, NULL, count,
1905 in_file->f_flags & O_NONBLOCK?LDLM_FL_BLOCK_NOWAIT:0);
1909 ll_clear_file_contended(inode);
1910 ll_inode_size_lock(inode, 1);
1912 * Consistency guarantees: following possibilities exist for the
1913 * relation between region being read and real file size at this
1916 * (A): the region is completely inside of the file;
1918 * (B-x): x bytes of region are inside of the file, the rest is
1921 * (C): the region is completely outside of the file.
1923 * This classification is stable under DLM lock acquired by
1924 * ll_tree_lock() above, because to change class, other client has to
1925 * take DLM lock conflicting with our lock. Also, any updates to
1926 * ->i_size by other threads on this client are serialized by
1927 * ll_inode_size_lock(). This guarantees that short reads are handled
1928 * correctly in the face of concurrent writes and truncates.
1930 inode_init_lvb(inode, &lvb);
1931 obd_merge_lvb(ll_i2sbi(inode)->ll_dt_exp, lsm, &lvb, 1);
1933 if (*ppos + count - 1 > kms) {
1934 /* A glimpse is necessary to determine whether we return a
1935 * short read (B) or some zeroes at the end of the buffer (C) */
1936 ll_inode_size_unlock(inode, 1);
1937 retval = ll_glimpse_size(inode, LDLM_FL_BLOCK_GRANTED);
1941 /* region is within kms and, hence, within real file size (A) */
1942 i_size_write(inode, kms);
1943 ll_inode_size_unlock(inode, 1);
1946 CDEBUG(D_INFO, "Send ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
1947 inode->i_ino, count, *ppos, i_size_read(inode));
1949 bead.lrr_start = *ppos >> CFS_PAGE_SHIFT;
1950 bead.lrr_count = (count + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
1951 ll_ra_read_in(in_file, &bead);
1953 file_accessed(in_file);
1954 retval = generic_file_sendfile(in_file, ppos, count, actor, target);
1955 ll_ra_read_ex(in_file, &bead);
1958 ll_tree_unlock(&tree);
1962 static int ll_lov_recreate_obj(struct inode *inode, struct file *file,
1965 struct ll_inode_info *lli = ll_i2info(inode);
1966 struct obd_export *exp = ll_i2dtexp(inode);
1967 struct ll_recreate_obj ucreatp;
1968 struct obd_trans_info oti = { 0 };
1969 struct obdo *oa = NULL;
1972 struct lov_stripe_md *lsm, *lsm2;
1975 if (!capable (CAP_SYS_ADMIN))
1978 rc = copy_from_user(&ucreatp, (struct ll_recreate_obj *)arg,
1979 sizeof(struct ll_recreate_obj));
1987 down(&lli->lli_size_sem);
1990 GOTO(out, rc = -ENOENT);
1991 lsm_size = sizeof(*lsm) + (sizeof(struct lov_oinfo) *
1992 (lsm->lsm_stripe_count));
1994 OBD_ALLOC(lsm2, lsm_size);
1996 GOTO(out, rc = -ENOMEM);
1998 oa->o_id = ucreatp.lrc_id;
1999 oa->o_gr = ucreatp.lrc_group;
2000 oa->o_nlink = ucreatp.lrc_ost_idx;
2001 oa->o_flags |= OBD_FL_RECREATE_OBJS;
2002 oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
2003 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
2004 OBD_MD_FLMTIME | OBD_MD_FLCTIME);
2006 memcpy(lsm2, lsm, lsm_size);
2007 rc = obd_create(exp, oa, &lsm2, &oti);
2009 OBD_FREE(lsm2, lsm_size);
2012 up(&lli->lli_size_sem);
2017 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
2018 int flags, struct lov_user_md *lum, int lum_size)
2020 struct ll_inode_info *lli = ll_i2info(inode);
2021 struct lov_stripe_md *lsm;
2022 struct lookup_intent oit = {.it_op = IT_OPEN, .it_flags = flags};
2026 down(&lli->lli_size_sem);
2029 up(&lli->lli_size_sem);
2030 CDEBUG(D_IOCTL, "stripe already exists for ino %lu\n",
2035 rc = ll_intent_file_open(file, lum, lum_size, &oit);
2038 if (it_disposition(&oit, DISP_LOOKUP_NEG))
2039 GOTO(out_req_free, rc = -ENOENT);
2040 rc = oit.d.lustre.it_status;
2042 GOTO(out_req_free, rc);
2044 ll_release_openhandle(file->f_dentry, &oit);
2047 up(&lli->lli_size_sem);
2048 ll_intent_release(&oit);
2051 ptlrpc_req_finished((struct ptlrpc_request *) oit.d.lustre.it_data);
2055 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
2056 struct lov_mds_md **lmmp, int *lmm_size,
2057 struct ptlrpc_request **request)
2059 struct ll_sb_info *sbi = ll_i2sbi(inode);
2060 struct mdt_body *body;
2061 struct lov_mds_md *lmm = NULL;
2062 struct ptlrpc_request *req = NULL;
2063 struct obd_capa *oc;
2066 rc = ll_get_max_mdsize(sbi, &lmmsize);
2070 oc = ll_mdscapa_get(inode);
2071 rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode),
2072 oc, filename, strlen(filename) + 1,
2073 OBD_MD_FLEASIZE | OBD_MD_FLDIREA, lmmsize,
2074 ll_i2suppgid(inode), &req);
2077 CDEBUG(D_INFO, "md_getattr_name failed "
2078 "on %s: rc %d\n", filename, rc);
2082 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2083 LASSERT(body != NULL); /* checked by mdc_getattr_name */
2085 lmmsize = body->eadatasize;
2087 if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
2089 GOTO(out, rc = -ENODATA);
2092 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, lmmsize);
2093 LASSERT(lmm != NULL);
2096 * This is coming from the MDS, so is probably in
2097 * little endian. We convert it to host endian before
2098 * passing it to userspace.
2100 if (lmm->lmm_magic == __swab32(LOV_MAGIC)) {
2101 lustre_swab_lov_user_md((struct lov_user_md *)lmm);
2102 lustre_swab_lov_user_md_objects((struct lov_user_md *)lmm);
2103 } else if (lmm->lmm_magic == __swab32(LOV_MAGIC_JOIN)) {
2104 lustre_swab_lov_user_md_join((struct lov_user_md_join *)lmm);
2107 if (lmm->lmm_magic == LOV_MAGIC_JOIN) {
2108 struct lov_stripe_md *lsm;
2109 struct lov_user_md_join *lmj;
2110 int lmj_size, i, aindex = 0;
2112 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
2114 GOTO(out, rc = -ENOMEM);
2115 rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp, lsm);
2117 GOTO(out_free_memmd, rc);
2119 lmj_size = sizeof(struct lov_user_md_join) +
2120 lsm->lsm_stripe_count *
2121 sizeof(struct lov_user_ost_data_join);
2122 OBD_ALLOC(lmj, lmj_size);
2124 GOTO(out_free_memmd, rc = -ENOMEM);
2126 memcpy(lmj, lmm, sizeof(struct lov_user_md_join));
2127 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2128 struct lov_extent *lex =
2129 &lsm->lsm_array->lai_ext_array[aindex];
2131 if (lex->le_loi_idx + lex->le_stripe_count <= i)
2133 CDEBUG(D_INFO, "aindex %d i %d l_extent_start "
2134 LPU64" len %d\n", aindex, i,
2135 lex->le_start, (int)lex->le_len);
2136 lmj->lmm_objects[i].l_extent_start =
2139 if ((int)lex->le_len == -1)
2140 lmj->lmm_objects[i].l_extent_end = -1;
2142 lmj->lmm_objects[i].l_extent_end =
2143 lex->le_start + lex->le_len;
2144 lmj->lmm_objects[i].l_object_id =
2145 lsm->lsm_oinfo[i]->loi_id;
2146 lmj->lmm_objects[i].l_object_gr =
2147 lsm->lsm_oinfo[i]->loi_gr;
2148 lmj->lmm_objects[i].l_ost_gen =
2149 lsm->lsm_oinfo[i]->loi_ost_gen;
2150 lmj->lmm_objects[i].l_ost_idx =
2151 lsm->lsm_oinfo[i]->loi_ost_idx;
2153 lmm = (struct lov_mds_md *)lmj;
2156 obd_free_memmd(sbi->ll_dt_exp, &lsm);
2160 *lmm_size = lmmsize;
2165 static int ll_lov_setea(struct inode *inode, struct file *file,
2168 int flags = MDS_OPEN_HAS_OBJS | FMODE_WRITE;
2169 struct lov_user_md *lump;
2170 int lum_size = sizeof(struct lov_user_md) +
2171 sizeof(struct lov_user_ost_data);
2175 if (!capable (CAP_SYS_ADMIN))
2178 OBD_ALLOC(lump, lum_size);
2182 rc = copy_from_user(lump, (struct lov_user_md *)arg, lum_size);
2184 OBD_FREE(lump, lum_size);
2188 rc = ll_lov_setstripe_ea_info(inode, file, flags, lump, lum_size);
2190 OBD_FREE(lump, lum_size);
2194 static int ll_lov_setstripe(struct inode *inode, struct file *file,
2197 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
2199 int flags = FMODE_WRITE;
2202 /* Bug 1152: copy properly when this is no longer true */
2203 LASSERT(sizeof(lum) == sizeof(*lump));
2204 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lump->lmm_objects[0]));
2205 rc = copy_from_user(&lum, lump, sizeof(lum));
2209 rc = ll_lov_setstripe_ea_info(inode, file, flags, &lum, sizeof(lum));
2211 put_user(0, &lump->lmm_stripe_count);
2212 rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode),
2213 0, ll_i2info(inode)->lli_smd, lump);
2218 static int ll_lov_getstripe(struct inode *inode, unsigned long arg)
2220 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
2225 return obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode), 0, lsm,
2229 static int ll_get_grouplock(struct inode *inode, struct file *file,
2232 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2233 ldlm_policy_data_t policy = { .l_extent = { .start = 0,
2234 .end = OBD_OBJECT_EOF}};
2235 struct lustre_handle lockh = { 0 };
2236 struct ll_inode_info *lli = ll_i2info(inode);
2237 struct lov_stripe_md *lsm = lli->lli_smd;
2241 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
2245 policy.l_extent.gid = arg;
2246 if (file->f_flags & O_NONBLOCK)
2247 flags = LDLM_FL_BLOCK_NOWAIT;
2249 rc = ll_extent_lock(fd, inode, lsm, LCK_GROUP, &policy, &lockh, flags);
2253 fd->fd_flags |= LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK;
2255 memcpy(&fd->fd_cwlockh, &lockh, sizeof(lockh));
2260 static int ll_put_grouplock(struct inode *inode, struct file *file,
2263 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2264 struct ll_inode_info *lli = ll_i2info(inode);
2265 struct lov_stripe_md *lsm = lli->lli_smd;
2269 if (!(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
2270 /* Ugh, it's already unlocked. */
2274 if (fd->fd_gid != arg) /* Ugh? Unlocking with different gid? */
2277 fd->fd_flags &= ~(LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK);
2279 rc = ll_extent_unlock(fd, inode, lsm, LCK_GROUP, &fd->fd_cwlockh);
2284 memset(&fd->fd_cwlockh, 0, sizeof(fd->fd_cwlockh));
2289 static int join_sanity_check(struct inode *head, struct inode *tail)
2292 if ((ll_i2sbi(head)->ll_flags & LL_SBI_JOIN) == 0) {
2293 CERROR("server do not support join \n");
2296 if (!S_ISREG(tail->i_mode) || !S_ISREG(head->i_mode)) {
2297 CERROR("tail ino %lu and ino head %lu must be regular\n",
2298 head->i_ino, tail->i_ino);
2301 if (head->i_ino == tail->i_ino) {
2302 CERROR("file %lu can not be joined to itself \n", head->i_ino);
2305 if (i_size_read(head) % JOIN_FILE_ALIGN) {
2306 CERROR("hsize %llu must be times of 64K\n", i_size_read(head));
2312 static int join_file(struct inode *head_inode, struct file *head_filp,
2313 struct file *tail_filp)
2315 struct dentry *tail_dentry = tail_filp->f_dentry;
2316 struct lookup_intent oit = {.it_op = IT_OPEN,
2317 .it_flags = head_filp->f_flags|O_JOIN_FILE};
2318 struct ldlm_enqueue_info einfo = { LDLM_IBITS, LCK_CW,
2319 ll_md_blocking_ast, ldlm_completion_ast, NULL, NULL };
2321 struct lustre_handle lockh;
2322 struct md_op_data *op_data;
2327 tail_dentry = tail_filp->f_dentry;
2329 data = i_size_read(head_inode);
2330 op_data = ll_prep_md_op_data(NULL, head_inode,
2331 tail_dentry->d_parent->d_inode,
2332 tail_dentry->d_name.name,
2333 tail_dentry->d_name.len, 0,
2334 LUSTRE_OPC_ANY, &data);
2335 if (IS_ERR(op_data))
2336 RETURN(PTR_ERR(op_data));
2338 rc = md_enqueue(ll_i2mdexp(head_inode), &einfo, &oit,
2339 op_data, &lockh, NULL, 0, 0);
2341 ll_finish_md_op_data(op_data);
2345 rc = oit.d.lustre.it_status;
2347 if (rc < 0 || it_open_error(DISP_OPEN_OPEN, &oit)) {
2348 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, &oit);
2349 ptlrpc_req_finished((struct ptlrpc_request *)
2350 oit.d.lustre.it_data);
2354 if (oit.d.lustre.it_lock_mode) { /* If we got lock - release it right
2356 ldlm_lock_decref(&lockh, oit.d.lustre.it_lock_mode);
2357 oit.d.lustre.it_lock_mode = 0;
2359 ll_release_openhandle(head_filp->f_dentry, &oit);
2361 ll_intent_release(&oit);
2365 static int ll_file_join(struct inode *head, struct file *filp,
2366 char *filename_tail)
2368 struct inode *tail = NULL, *first = NULL, *second = NULL;
2369 struct dentry *tail_dentry;
2370 struct file *tail_filp, *first_filp, *second_filp;
2371 struct ll_lock_tree first_tree, second_tree;
2372 struct ll_lock_tree_node *first_node, *second_node;
2373 struct ll_inode_info *hlli = ll_i2info(head), *tlli;
2374 int rc = 0, cleanup_phase = 0;
2377 CDEBUG(D_VFSTRACE, "VFS Op:head=%lu/%u(%p) tail %s\n",
2378 head->i_ino, head->i_generation, head, filename_tail);
2380 tail_filp = filp_open(filename_tail, O_WRONLY, 0644);
2381 if (IS_ERR(tail_filp)) {
2382 CERROR("Can not open tail file %s", filename_tail);
2383 rc = PTR_ERR(tail_filp);
2386 tail = igrab(tail_filp->f_dentry->d_inode);
2388 tlli = ll_i2info(tail);
2389 tail_dentry = tail_filp->f_dentry;
2390 LASSERT(tail_dentry);
2393 /*reorder the inode for lock sequence*/
2394 first = head->i_ino > tail->i_ino ? head : tail;
2395 second = head->i_ino > tail->i_ino ? tail : head;
2396 first_filp = head->i_ino > tail->i_ino ? filp : tail_filp;
2397 second_filp = head->i_ino > tail->i_ino ? tail_filp : filp;
2399 CDEBUG(D_INFO, "reorder object from %lu:%lu to %lu:%lu \n",
2400 head->i_ino, tail->i_ino, first->i_ino, second->i_ino);
2401 first_node = ll_node_from_inode(first, 0, OBD_OBJECT_EOF, LCK_EX);
2402 if (IS_ERR(first_node)){
2403 rc = PTR_ERR(first_node);
2406 first_tree.lt_fd = first_filp->private_data;
2407 rc = ll_tree_lock(&first_tree, first_node, NULL, 0, 0);
2412 second_node = ll_node_from_inode(second, 0, OBD_OBJECT_EOF, LCK_EX);
2413 if (IS_ERR(second_node)){
2414 rc = PTR_ERR(second_node);
2417 second_tree.lt_fd = second_filp->private_data;
2418 rc = ll_tree_lock(&second_tree, second_node, NULL, 0, 0);
2423 rc = join_sanity_check(head, tail);
2427 rc = join_file(head, filp, tail_filp);
2431 switch (cleanup_phase) {
2433 ll_tree_unlock(&second_tree);
2434 obd_cancel_unused(ll_i2dtexp(second),
2435 ll_i2info(second)->lli_smd, 0, NULL);
2437 ll_tree_unlock(&first_tree);
2438 obd_cancel_unused(ll_i2dtexp(first),
2439 ll_i2info(first)->lli_smd, 0, NULL);
2441 filp_close(tail_filp, 0);
2444 if (head && rc == 0) {
2445 obd_free_memmd(ll_i2sbi(head)->ll_dt_exp,
2447 hlli->lli_smd = NULL;
2452 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2458 int ll_release_openhandle(struct dentry *dentry, struct lookup_intent *it)
2460 struct inode *inode = dentry->d_inode;
2461 struct obd_client_handle *och;
2467 /* Root ? Do nothing. */
2468 if (dentry->d_inode->i_sb->s_root == dentry)
2471 /* No open handle to close? Move away */
2472 if (!it_disposition(it, DISP_OPEN_OPEN))
2475 LASSERT(it_open_error(DISP_OPEN_OPEN, it) == 0);
2477 OBD_ALLOC(och, sizeof(*och));
2479 GOTO(out, rc = -ENOMEM);
2481 ll_och_fill(ll_i2sbi(inode)->ll_md_exp,
2482 ll_i2info(inode), it, och);
2484 rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
2487 /* this one is in place of ll_file_open */
2488 ptlrpc_req_finished(it->d.lustre.it_data);
2489 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
2493 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
2496 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2500 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),cmd=%x\n", inode->i_ino,
2501 inode->i_generation, inode, cmd);
2502 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
2504 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
2505 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
2509 case LL_IOC_GETFLAGS:
2510 /* Get the current value of the file flags */
2511 return put_user(fd->fd_flags, (int *)arg);
2512 case LL_IOC_SETFLAGS:
2513 case LL_IOC_CLRFLAGS:
2514 /* Set or clear specific file flags */
2515 /* XXX This probably needs checks to ensure the flags are
2516 * not abused, and to handle any flag side effects.
2518 if (get_user(flags, (int *) arg))
2521 if (cmd == LL_IOC_SETFLAGS) {
2522 if ((flags & LL_FILE_IGNORE_LOCK) &&
2523 !(file->f_flags & O_DIRECT)) {
2524 CERROR("%s: unable to disable locking on "
2525 "non-O_DIRECT file\n", current->comm);
2529 fd->fd_flags |= flags;
2531 fd->fd_flags &= ~flags;
2534 case LL_IOC_LOV_SETSTRIPE:
2535 RETURN(ll_lov_setstripe(inode, file, arg));
2536 case LL_IOC_LOV_SETEA:
2537 RETURN(ll_lov_setea(inode, file, arg));
2538 case LL_IOC_LOV_GETSTRIPE:
2539 RETURN(ll_lov_getstripe(inode, arg));
2540 case LL_IOC_RECREATE_OBJ:
2541 RETURN(ll_lov_recreate_obj(inode, file, arg));
2542 case EXT3_IOC_GETFLAGS:
2543 case EXT3_IOC_SETFLAGS:
2544 RETURN(ll_iocontrol(inode, file, cmd, arg));
2545 case EXT3_IOC_GETVERSION_OLD:
2546 case EXT3_IOC_GETVERSION:
2547 RETURN(put_user(inode->i_generation, (int *)arg));
2552 ftail = getname((const char *)arg);
2554 RETURN(PTR_ERR(ftail));
2555 rc = ll_file_join(inode, file, ftail);
2559 case LL_IOC_GROUP_LOCK:
2560 RETURN(ll_get_grouplock(inode, file, arg));
2561 case LL_IOC_GROUP_UNLOCK:
2562 RETURN(ll_put_grouplock(inode, file, arg));
2563 case IOC_OBD_STATFS:
2564 RETURN(ll_obd_statfs(inode, (void *)arg));
2566 /* We need to special case any other ioctls we want to handle,
2567 * to send them to the MDS/OST as appropriate and to properly
2568 * network encode the arg field.
2569 case EXT3_IOC_SETVERSION_OLD:
2570 case EXT3_IOC_SETVERSION:
2572 case LL_IOC_FLUSHCTX:
2573 RETURN(ll_flush_ctx(inode));
2578 ll_iocontrol_call(inode, file, cmd, arg, &err))
2581 RETURN(obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
2587 loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
2589 struct inode *inode = file->f_dentry->d_inode;
2590 struct ll_inode_info *lli = ll_i2info(inode);
2591 struct lov_stripe_md *lsm = lli->lli_smd;
2594 retval = offset + ((origin == 2) ? i_size_read(inode) :
2595 (origin == 1) ? file->f_pos : 0);
2596 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), to=%Lu=%#Lx(%s)\n",
2597 inode->i_ino, inode->i_generation, inode, retval, retval,
2598 origin == 2 ? "SEEK_END": origin == 1 ? "SEEK_CUR" : "SEEK_SET");
2599 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK, 1);
2601 if (origin == 2) { /* SEEK_END */
2602 int nonblock = 0, rc;
2604 if (file->f_flags & O_NONBLOCK)
2605 nonblock = LDLM_FL_BLOCK_NOWAIT;
2608 rc = ll_glimpse_size(inode, nonblock);
2613 ll_inode_size_lock(inode, 0);
2614 offset += i_size_read(inode);
2615 ll_inode_size_unlock(inode, 0);
2616 } else if (origin == 1) { /* SEEK_CUR */
2617 offset += file->f_pos;
2621 if (offset >= 0 && offset <= ll_file_maxbytes(inode)) {
2622 if (offset != file->f_pos) {
2623 file->f_pos = offset;
2624 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
2626 file->f_version = ++event;
2635 int ll_fsync(struct file *file, struct dentry *dentry, int data)
2637 struct inode *inode = dentry->d_inode;
2638 struct ll_inode_info *lli = ll_i2info(inode);
2639 struct lov_stripe_md *lsm = lli->lli_smd;
2640 struct ptlrpc_request *req;
2641 struct obd_capa *oc;
2644 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
2645 inode->i_generation, inode);
2646 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1);
2648 /* fsync's caller has already called _fdata{sync,write}, we want
2649 * that IO to finish before calling the osc and mdc sync methods */
2650 rc = filemap_fdatawait(inode->i_mapping);
2652 /* catch async errors that were recorded back when async writeback
2653 * failed for pages in this mapping. */
2654 err = lli->lli_async_rc;
2655 lli->lli_async_rc = 0;
2659 err = lov_test_and_clear_async_rc(lsm);
2664 oc = ll_mdscapa_get(inode);
2665 err = md_sync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), oc,
2671 ptlrpc_req_finished(req);
2678 RETURN(rc ? rc : -ENOMEM);
2680 oa->o_id = lsm->lsm_object_id;
2681 oa->o_gr = lsm->lsm_object_gr;
2682 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
2683 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
2684 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
2687 oc = ll_osscapa_get(inode, CAPA_OPC_OSS_WRITE);
2688 err = obd_sync(ll_i2sbi(inode)->ll_dt_exp, oa, lsm,
2689 0, OBD_OBJECT_EOF, oc);
2699 int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
2701 struct inode *inode = file->f_dentry->d_inode;
2702 struct ll_sb_info *sbi = ll_i2sbi(inode);
2703 struct ldlm_res_id res_id =
2704 { .name = { fid_seq(ll_inode2fid(inode)),
2705 fid_oid(ll_inode2fid(inode)),
2706 fid_ver(ll_inode2fid(inode)),
2708 struct ldlm_enqueue_info einfo = { LDLM_FLOCK, 0, NULL,
2709 ldlm_flock_completion_ast, NULL, file_lock };
2710 struct lustre_handle lockh = {0};
2711 ldlm_policy_data_t flock;
2716 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu file_lock=%p\n",
2717 inode->i_ino, file_lock);
2719 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK, 1);
2721 if (file_lock->fl_flags & FL_FLOCK) {
2722 LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK));
2723 /* set missing params for flock() calls */
2724 file_lock->fl_end = OFFSET_MAX;
2725 file_lock->fl_pid = current->tgid;
2727 flock.l_flock.pid = file_lock->fl_pid;
2728 flock.l_flock.start = file_lock->fl_start;
2729 flock.l_flock.end = file_lock->fl_end;
2731 switch (file_lock->fl_type) {
2733 einfo.ei_mode = LCK_PR;
2736 /* An unlock request may or may not have any relation to
2737 * existing locks so we may not be able to pass a lock handle
2738 * via a normal ldlm_lock_cancel() request. The request may even
2739 * unlock a byte range in the middle of an existing lock. In
2740 * order to process an unlock request we need all of the same
2741 * information that is given with a normal read or write record
2742 * lock request. To avoid creating another ldlm unlock (cancel)
2743 * message we'll treat a LCK_NL flock request as an unlock. */
2744 einfo.ei_mode = LCK_NL;
2747 einfo.ei_mode = LCK_PW;
2750 CERROR("unknown fcntl lock type: %d\n", file_lock->fl_type);
2765 flags = LDLM_FL_BLOCK_NOWAIT;
2771 flags = LDLM_FL_TEST_LOCK;
2772 /* Save the old mode so that if the mode in the lock changes we
2773 * can decrement the appropriate reader or writer refcount. */
2774 file_lock->fl_type = einfo.ei_mode;
2777 CERROR("unknown fcntl lock command: %d\n", cmd);
2781 CDEBUG(D_DLMTRACE, "inode=%lu, pid=%u, flags=%#x, mode=%u, "
2782 "start="LPU64", end="LPU64"\n", inode->i_ino, flock.l_flock.pid,
2783 flags, einfo.ei_mode, flock.l_flock.start, flock.l_flock.end);
2785 rc = ldlm_cli_enqueue(sbi->ll_md_exp, NULL, &einfo, &res_id,
2786 &flock, &flags, NULL, 0, NULL, &lockh, 0);
2787 if ((file_lock->fl_flags & FL_FLOCK) &&
2788 (rc == 0 || file_lock->fl_type == F_UNLCK))
2789 ll_flock_lock_file_wait(file, file_lock, (cmd == F_SETLKW));
2790 #ifdef HAVE_F_OP_FLOCK
2791 if ((file_lock->fl_flags & FL_POSIX) &&
2792 (rc == 0 || file_lock->fl_type == F_UNLCK) &&
2793 !(flags & LDLM_FL_TEST_LOCK))
2794 posix_lock_file_wait(file, file_lock);
2800 int ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock)
2807 int ll_have_md_lock(struct inode *inode, __u64 bits)
2809 struct lustre_handle lockh;
2810 ldlm_policy_data_t policy = { .l_inodebits = {bits}};
2818 fid = &ll_i2info(inode)->lli_fid;
2819 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
2821 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK;
2822 if (md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS, &policy,
2823 LCK_CR|LCK_CW|LCK_PR|LCK_PW, &lockh)) {
2829 ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits,
2830 struct lustre_handle *lockh)
2832 ldlm_policy_data_t policy = { .l_inodebits = {bits}};
2838 fid = &ll_i2info(inode)->lli_fid;
2839 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
2841 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
2842 rc = md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS, &policy,
2843 LCK_CR|LCK_CW|LCK_PR|LCK_PW, lockh);
2847 static int ll_inode_revalidate_fini(struct inode *inode, int rc) {
2848 if (rc == -ENOENT) { /* Already unlinked. Just update nlink
2849 * and return success */
2851 /* This path cannot be hit for regular files unless in
2852 * case of obscure races, so no need to to validate
2854 if (!S_ISREG(inode->i_mode) &&
2855 !S_ISDIR(inode->i_mode))
2860 CERROR("failure %d inode %lu\n", rc, inode->i_ino);
2868 int ll_inode_revalidate_it(struct dentry *dentry, struct lookup_intent *it)
2870 struct inode *inode = dentry->d_inode;
2871 struct ptlrpc_request *req = NULL;
2872 struct ll_sb_info *sbi;
2873 struct obd_export *exp;
2878 CERROR("REPORT THIS LINE TO PETER\n");
2881 sbi = ll_i2sbi(inode);
2883 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),name=%s\n",
2884 inode->i_ino, inode->i_generation, inode, dentry->d_name.name);
2886 exp = ll_i2mdexp(inode);
2888 if (exp->exp_connect_flags & OBD_CONNECT_ATTRFID) {
2889 struct lookup_intent oit = { .it_op = IT_GETATTR };
2890 struct md_op_data *op_data;
2892 /* Call getattr by fid, so do not provide name at all. */
2893 op_data = ll_prep_md_op_data(NULL, dentry->d_parent->d_inode,
2894 dentry->d_inode, NULL, 0, 0,
2895 LUSTRE_OPC_ANY, NULL);
2896 if (IS_ERR(op_data))
2897 RETURN(PTR_ERR(op_data));
2899 oit.it_flags |= O_CHECK_STALE;
2900 rc = md_intent_lock(exp, op_data, NULL, 0,
2901 /* we are not interested in name
2904 ll_md_blocking_ast, 0);
2905 ll_finish_md_op_data(op_data);
2906 oit.it_flags &= ~O_CHECK_STALE;
2908 rc = ll_inode_revalidate_fini(inode, rc);
2912 rc = ll_revalidate_it_finish(req, &oit, dentry);
2914 ll_intent_release(&oit);
2918 /* Unlinked? Unhash dentry, so it is not picked up later by
2919 do_lookup() -> ll_revalidate_it(). We cannot use d_drop
2920 here to preserve get_cwd functionality on 2.6.
2922 if (!dentry->d_inode->i_nlink) {
2923 spin_lock(&dcache_lock);
2924 ll_drop_dentry(dentry);
2925 spin_unlock(&dcache_lock);
2928 ll_lookup_finish_locks(&oit, dentry);
2929 } else if (!ll_have_md_lock(dentry->d_inode, MDS_INODELOCK_UPDATE |
2930 MDS_INODELOCK_LOOKUP)) {
2931 struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode);
2932 obd_valid valid = OBD_MD_FLGETATTR;
2933 struct obd_capa *oc;
2936 if (S_ISREG(inode->i_mode)) {
2937 rc = ll_get_max_mdsize(sbi, &ealen);
2940 valid |= OBD_MD_FLEASIZE | OBD_MD_FLMODEASIZE;
2942 /* Once OBD_CONNECT_ATTRFID is not supported, we can't find one
2943 * capa for this inode. Because we only keep capas of dirs
2945 oc = ll_mdscapa_get(inode);
2946 rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode), oc, valid,
2950 rc = ll_inode_revalidate_fini(inode, rc);
2954 rc = ll_prep_inode(&inode, req, NULL);
2959 /* if object not yet allocated, don't validate size */
2960 if (ll_i2info(inode)->lli_smd == NULL)
2963 /* ll_glimpse_size will prefer locally cached writes if they extend
2965 rc = ll_glimpse_size(inode, 0);
2968 ptlrpc_req_finished(req);
2972 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
2973 struct lookup_intent *it, struct kstat *stat)
2975 struct inode *inode = de->d_inode;
2978 res = ll_inode_revalidate_it(de, it);
2979 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETATTR, 1);
2984 stat->dev = inode->i_sb->s_dev;
2985 stat->ino = inode->i_ino;
2986 stat->mode = inode->i_mode;
2987 stat->nlink = inode->i_nlink;
2988 stat->uid = inode->i_uid;
2989 stat->gid = inode->i_gid;
2990 stat->rdev = kdev_t_to_nr(inode->i_rdev);
2991 stat->atime = inode->i_atime;
2992 stat->mtime = inode->i_mtime;
2993 stat->ctime = inode->i_ctime;
2994 #ifdef HAVE_INODE_BLKSIZE
2995 stat->blksize = inode->i_blksize;
2997 stat->blksize = 1 << inode->i_blkbits;
3000 ll_inode_size_lock(inode, 0);
3001 stat->size = i_size_read(inode);
3002 stat->blocks = inode->i_blocks;
3003 ll_inode_size_unlock(inode, 0);
3007 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
3009 struct lookup_intent it = { .it_op = IT_GETATTR };
3011 return ll_getattr_it(mnt, de, &it, stat);
3015 int lustre_check_acl(struct inode *inode, int mask)
3017 #ifdef CONFIG_FS_POSIX_ACL
3018 struct ll_inode_info *lli = ll_i2info(inode);
3019 struct posix_acl *acl;
3023 spin_lock(&lli->lli_lock);
3024 acl = posix_acl_dup(lli->lli_posix_acl);
3025 spin_unlock(&lli->lli_lock);
3030 rc = posix_acl_permission(inode, acl, mask);
3031 posix_acl_release(acl);
3039 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10))
3040 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
3042 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
3043 inode->i_ino, inode->i_generation, inode, mask);
3044 if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
3045 return lustre_check_remote_perm(inode, mask);
3047 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
3048 return generic_permission(inode, mask, lustre_check_acl);
3051 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
3053 int mode = inode->i_mode;
3056 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
3057 inode->i_ino, inode->i_generation, inode, mask);
3059 if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
3060 return lustre_check_remote_perm(inode, mask);
3062 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
3064 if ((mask & MAY_WRITE) && IS_RDONLY(inode) &&
3065 (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
3067 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
3069 if (current->fsuid == inode->i_uid) {
3072 if (((mode >> 3) & mask & S_IRWXO) != mask)
3074 rc = lustre_check_acl(inode, mask);
3078 goto check_capabilities;
3082 if (in_group_p(inode->i_gid))
3085 if ((mode & mask & S_IRWXO) == mask)
3089 if (!(mask & MAY_EXEC) ||
3090 (inode->i_mode & S_IXUGO) || S_ISDIR(inode->i_mode))
3091 if (capable(CAP_DAC_OVERRIDE))
3094 if (capable(CAP_DAC_READ_SEARCH) && ((mask == MAY_READ) ||
3095 (S_ISDIR(inode->i_mode) && !(mask & MAY_WRITE))))
3102 /* -o localflock - only provides locally consistent flock locks */
3103 struct file_operations ll_file_operations = {
3104 .read = ll_file_read,
3105 .write = ll_file_write,
3106 .ioctl = ll_file_ioctl,
3107 .open = ll_file_open,
3108 .release = ll_file_release,
3109 .mmap = ll_file_mmap,
3110 .llseek = ll_file_seek,
3111 .sendfile = ll_file_sendfile,
3115 struct file_operations ll_file_operations_flock = {
3116 .read = ll_file_read,
3117 .write = ll_file_write,
3118 .ioctl = ll_file_ioctl,
3119 .open = ll_file_open,
3120 .release = ll_file_release,
3121 .mmap = ll_file_mmap,
3122 .llseek = ll_file_seek,
3123 .sendfile = ll_file_sendfile,
3125 #ifdef HAVE_F_OP_FLOCK
3126 .flock = ll_file_flock,
3128 .lock = ll_file_flock
3131 /* These are for -o noflock - to return ENOSYS on flock calls */
3132 struct file_operations ll_file_operations_noflock = {
3133 .read = ll_file_read,
3134 .write = ll_file_write,
3135 .ioctl = ll_file_ioctl,
3136 .open = ll_file_open,
3137 .release = ll_file_release,
3138 .mmap = ll_file_mmap,
3139 .llseek = ll_file_seek,
3140 .sendfile = ll_file_sendfile,
3142 #ifdef HAVE_F_OP_FLOCK
3143 .flock = ll_file_noflock,
3145 .lock = ll_file_noflock
3148 struct inode_operations ll_file_inode_operations = {
3149 #ifdef HAVE_VFS_INTENT_PATCHES
3150 .setattr_raw = ll_setattr_raw,
3152 .setattr = ll_setattr,
3153 .truncate = ll_truncate,
3154 .getattr = ll_getattr,
3155 .permission = ll_inode_permission,
3156 .setxattr = ll_setxattr,
3157 .getxattr = ll_getxattr,
3158 .listxattr = ll_listxattr,
3159 .removexattr = ll_removexattr,
3162 /* dynamic ioctl number support routins */
3163 static struct llioc_ctl_data {
3164 struct rw_semaphore ioc_sem;
3165 struct list_head ioc_head;
3167 __RWSEM_INITIALIZER(llioc.ioc_sem),
3168 CFS_LIST_HEAD_INIT(llioc.ioc_head)
3173 struct list_head iocd_list;
3174 unsigned int iocd_size;
3175 llioc_callback_t iocd_cb;
3176 unsigned int iocd_count;
3177 unsigned int iocd_cmd[0];
3180 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd)
3183 struct llioc_data *in_data = NULL;
3186 if (cb == NULL || cmd == NULL ||
3187 count > LLIOC_MAX_CMD || count < 0)
3190 size = sizeof(*in_data) + count * sizeof(unsigned int);
3191 OBD_ALLOC(in_data, size);
3192 if (in_data == NULL)
3195 memset(in_data, 0, sizeof(*in_data));
3196 in_data->iocd_size = size;
3197 in_data->iocd_cb = cb;
3198 in_data->iocd_count = count;
3199 memcpy(in_data->iocd_cmd, cmd, sizeof(unsigned int) * count);
3201 down_write(&llioc.ioc_sem);
3202 list_add_tail(&in_data->iocd_list, &llioc.ioc_head);
3203 up_write(&llioc.ioc_sem);
3208 void ll_iocontrol_unregister(void *magic)
3210 struct llioc_data *tmp;
3215 down_write(&llioc.ioc_sem);
3216 list_for_each_entry(tmp, &llioc.ioc_head, iocd_list) {
3218 unsigned int size = tmp->iocd_size;
3220 list_del(&tmp->iocd_list);
3221 up_write(&llioc.ioc_sem);
3223 OBD_FREE(tmp, size);
3227 up_write(&llioc.ioc_sem);
3229 CWARN("didn't find iocontrol register block with magic: %p\n", magic);
3232 EXPORT_SYMBOL(ll_iocontrol_register);
3233 EXPORT_SYMBOL(ll_iocontrol_unregister);
3235 enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file,
3236 unsigned int cmd, unsigned long arg, int *rcp)
3238 enum llioc_iter ret = LLIOC_CONT;
3239 struct llioc_data *data;
3240 int rc = -EINVAL, i;
3242 down_read(&llioc.ioc_sem);
3243 list_for_each_entry(data, &llioc.ioc_head, iocd_list) {
3244 for (i = 0; i < data->iocd_count; i++) {
3245 if (cmd != data->iocd_cmd[i])
3248 ret = data->iocd_cb(inode, file, cmd, arg, data, &rc);
3252 if (ret == LLIOC_STOP)
3255 up_read(&llioc.ioc_sem);