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
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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"
50 #include <lustre/ll_fiemap.h>
52 /* also used by llite/special.c:ll_special_open() */
53 struct ll_file_data *ll_file_data_get(void)
55 struct ll_file_data *fd;
57 OBD_SLAB_ALLOC_PTR(fd, ll_file_data_slab);
61 static void ll_file_data_put(struct ll_file_data *fd)
64 OBD_SLAB_FREE_PTR(fd, ll_file_data_slab);
67 void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
68 struct lustre_handle *fh)
70 op_data->op_fid1 = ll_i2info(inode)->lli_fid;
71 op_data->op_attr.ia_mode = inode->i_mode;
72 op_data->op_attr.ia_atime = inode->i_atime;
73 op_data->op_attr.ia_mtime = inode->i_mtime;
74 op_data->op_attr.ia_ctime = inode->i_ctime;
75 op_data->op_attr.ia_size = i_size_read(inode);
76 op_data->op_attr_blocks = inode->i_blocks;
77 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = inode->i_flags;
78 op_data->op_ioepoch = ll_i2info(inode)->lli_ioepoch;
79 memcpy(&op_data->op_handle, fh, sizeof(op_data->op_handle));
80 op_data->op_capa1 = ll_mdscapa_get(inode);
83 static void ll_prepare_close(struct inode *inode, struct md_op_data *op_data,
84 struct obd_client_handle *och)
88 op_data->op_attr.ia_valid = ATTR_MODE | ATTR_ATIME_SET |
89 ATTR_MTIME_SET | ATTR_CTIME_SET;
91 if (!(och->och_flags & FMODE_WRITE))
94 if (!(ll_i2mdexp(inode)->exp_connect_flags & OBD_CONNECT_SOM) ||
95 !S_ISREG(inode->i_mode))
96 op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
98 ll_epoch_close(inode, op_data, &och, 0);
101 ll_pack_inode2opdata(inode, op_data, &och->och_fh);
105 static int ll_close_inode_openhandle(struct obd_export *md_exp,
107 struct obd_client_handle *och)
109 struct obd_export *exp = ll_i2mdexp(inode);
110 struct md_op_data *op_data;
111 struct ptlrpc_request *req = NULL;
112 struct obd_device *obd = class_exp2obd(exp);
119 * XXX: in case of LMV, is this correct to access
122 CERROR("Invalid MDC connection handle "LPX64"\n",
123 ll_i2mdexp(inode)->exp_handle.h_cookie);
128 * here we check if this is forced umount. If so this is called on
129 * canceling "open lock" and we do not call md_close() in this case, as
130 * it will not be successful, as import is already deactivated.
135 OBD_ALLOC_PTR(op_data);
137 GOTO(out, rc = -ENOMEM); // XXX We leak openhandle and request here.
139 ll_prepare_close(inode, op_data, och);
140 epoch_close = (op_data->op_flags & MF_EPOCH_CLOSE);
141 rc = md_close(md_exp, op_data, och->och_mod, &req);
146 /* This close must have the epoch closed. */
147 LASSERT(exp->exp_connect_flags & OBD_CONNECT_SOM);
148 LASSERT(epoch_close);
149 /* MDS has instructed us to obtain Size-on-MDS attribute from
150 * OSTs and send setattr to back to MDS. */
151 rc = ll_sizeonmds_update(inode, och->och_mod,
152 &och->och_fh, op_data->op_ioepoch);
154 CERROR("inode %lu mdc Size-on-MDS update failed: "
155 "rc = %d\n", inode->i_ino, rc);
159 CERROR("inode %lu mdc close failed: rc = %d\n",
162 ll_finish_md_op_data(op_data);
165 rc = ll_objects_destroy(req, inode);
167 CERROR("inode %lu ll_objects destroy: rc = %d\n",
174 if ((exp->exp_connect_flags & OBD_CONNECT_SOM) && !epoch_close &&
175 S_ISREG(inode->i_mode) && (och->och_flags & FMODE_WRITE)) {
176 ll_queue_done_writing(inode, LLIF_DONE_WRITING);
179 ptlrpc_close_replay_seq(req);
180 md_clear_open_replay_data(md_exp, och);
181 /* Free @och if it is not waiting for DONE_WRITING. */
182 och->och_fh.cookie = DEAD_HANDLE_MAGIC;
185 if (req) /* This is close request */
186 ptlrpc_req_finished(req);
190 int ll_md_real_close(struct inode *inode, int flags)
192 struct ll_inode_info *lli = ll_i2info(inode);
193 struct obd_client_handle **och_p;
194 struct obd_client_handle *och;
199 if (flags & FMODE_WRITE) {
200 och_p = &lli->lli_mds_write_och;
201 och_usecount = &lli->lli_open_fd_write_count;
202 } else if (flags & FMODE_EXEC) {
203 och_p = &lli->lli_mds_exec_och;
204 och_usecount = &lli->lli_open_fd_exec_count;
206 LASSERT(flags & FMODE_READ);
207 och_p = &lli->lli_mds_read_och;
208 och_usecount = &lli->lli_open_fd_read_count;
211 down(&lli->lli_och_sem);
212 if (*och_usecount) { /* There are still users of this handle, so
214 up(&lli->lli_och_sem);
219 up(&lli->lli_och_sem);
221 if (och) { /* There might be a race and somebody have freed this och
223 rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
230 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
233 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
234 struct ll_inode_info *lli = ll_i2info(inode);
238 /* clear group lock, if present */
239 if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
240 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
241 fd->fd_flags &= ~(LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK);
242 rc = ll_extent_unlock(fd, inode, lsm, LCK_GROUP,
246 /* Let's see if we have good enough OPEN lock on the file and if
247 we can skip talking to MDS */
248 if (file->f_dentry->d_inode) { /* Can this ever be false? */
250 int flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
251 struct lustre_handle lockh;
252 struct inode *inode = file->f_dentry->d_inode;
253 ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_OPEN}};
255 down(&lli->lli_och_sem);
256 if (fd->fd_omode & FMODE_WRITE) {
258 LASSERT(lli->lli_open_fd_write_count);
259 lli->lli_open_fd_write_count--;
260 } else if (fd->fd_omode & FMODE_EXEC) {
262 LASSERT(lli->lli_open_fd_exec_count);
263 lli->lli_open_fd_exec_count--;
266 LASSERT(lli->lli_open_fd_read_count);
267 lli->lli_open_fd_read_count--;
269 up(&lli->lli_och_sem);
271 if (!md_lock_match(md_exp, flags, ll_inode2fid(inode),
272 LDLM_IBITS, &policy, lockmode,
274 rc = ll_md_real_close(file->f_dentry->d_inode,
278 CERROR("Releasing a file %p with negative dentry %p. Name %s",
279 file, file->f_dentry, file->f_dentry->d_name.name);
282 LUSTRE_FPRIVATE(file) = NULL;
283 ll_file_data_put(fd);
284 ll_capa_close(inode);
289 int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm);
291 /* While this returns an error code, fput() the caller does not, so we need
292 * to make every effort to clean up all of our state here. Also, applications
293 * rarely check close errors and even if an error is returned they will not
294 * re-try the close call.
296 int ll_file_release(struct inode *inode, struct file *file)
298 struct ll_file_data *fd;
299 struct ll_sb_info *sbi = ll_i2sbi(inode);
300 struct ll_inode_info *lli = ll_i2info(inode);
301 struct lov_stripe_md *lsm = lli->lli_smd;
305 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
306 inode->i_generation, inode);
308 #ifdef CONFIG_FS_POSIX_ACL
309 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
310 inode == inode->i_sb->s_root->d_inode) {
311 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
314 if (unlikely(fd->fd_flags & LL_FILE_RMTACL)) {
315 fd->fd_flags &= ~LL_FILE_RMTACL;
316 rct_del(&sbi->ll_rct, cfs_curproc_pid());
317 et_search_free(&sbi->ll_et, cfs_curproc_pid());
322 if (inode->i_sb->s_root != file->f_dentry)
323 ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
324 fd = LUSTRE_FPRIVATE(file);
327 /* The last ref on @file, maybe not the the owner pid of statahead.
328 * Different processes can open the same dir, "ll_opendir_key" means:
329 * it is me that should stop the statahead thread. */
330 if (lli->lli_opendir_key == fd)
331 ll_stop_statahead(inode, fd);
333 if (inode->i_sb->s_root == file->f_dentry) {
334 LUSTRE_FPRIVATE(file) = NULL;
335 ll_file_data_put(fd);
340 lov_test_and_clear_async_rc(lsm);
341 lli->lli_async_rc = 0;
343 rc = ll_md_close(sbi->ll_md_exp, inode, file);
347 static int ll_intent_file_open(struct file *file, void *lmm,
348 int lmmsize, struct lookup_intent *itp)
350 struct ll_sb_info *sbi = ll_i2sbi(file->f_dentry->d_inode);
351 struct dentry *parent = file->f_dentry->d_parent;
352 const char *name = file->f_dentry->d_name.name;
353 const int len = file->f_dentry->d_name.len;
354 struct md_op_data *op_data;
355 struct ptlrpc_request *req;
362 /* Usually we come here only for NFSD, and we want open lock.
363 But we can also get here with pre 2.6.15 patchless kernels, and in
364 that case that lock is also ok */
365 /* We can also get here if there was cached open handle in revalidate_it
366 * but it disappeared while we were getting from there to ll_file_open.
367 * But this means this file was closed and immediatelly opened which
368 * makes a good candidate for using OPEN lock */
369 /* If lmmsize & lmm are not 0, we are just setting stripe info
370 * parameters. No need for the open lock */
371 if (!lmm && !lmmsize)
372 itp->it_flags |= MDS_OPEN_LOCK;
374 op_data = ll_prep_md_op_data(NULL, parent->d_inode,
375 file->f_dentry->d_inode, name, len,
376 O_RDWR, LUSTRE_OPC_ANY, NULL);
378 RETURN(PTR_ERR(op_data));
380 rc = md_intent_lock(sbi->ll_md_exp, op_data, lmm, lmmsize, itp,
381 0 /*unused */, &req, ll_md_blocking_ast, 0);
382 ll_finish_md_op_data(op_data);
384 /* reason for keep own exit path - don`t flood log
385 * with messages with -ESTALE errors.
387 if (!it_disposition(itp, DISP_OPEN_OPEN) ||
388 it_open_error(DISP_OPEN_OPEN, itp))
390 ll_release_openhandle(file->f_dentry, itp);
394 if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) {
395 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp);
396 CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc);
400 if (itp->d.lustre.it_lock_mode)
401 md_set_lock_data(sbi->ll_md_exp,
402 &itp->d.lustre.it_lock_handle,
403 file->f_dentry->d_inode);
405 rc = ll_prep_inode(&file->f_dentry->d_inode, req, NULL);
407 ptlrpc_req_finished(itp->d.lustre.it_data);
410 it_clear_disposition(itp, DISP_ENQ_COMPLETE);
411 ll_intent_drop_lock(itp);
416 static int ll_och_fill(struct obd_export *md_exp, struct ll_inode_info *lli,
417 struct lookup_intent *it, struct obd_client_handle *och)
419 struct ptlrpc_request *req = it->d.lustre.it_data;
420 struct mdt_body *body;
424 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
425 LASSERT(body != NULL); /* reply already checked out */
427 memcpy(&och->och_fh, &body->handle, sizeof(body->handle));
428 och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
429 och->och_fid = lli->lli_fid;
430 och->och_flags = it->it_flags;
431 lli->lli_ioepoch = body->ioepoch;
433 return md_set_open_replay_data(md_exp, och, req);
436 int ll_local_open(struct file *file, struct lookup_intent *it,
437 struct ll_file_data *fd, struct obd_client_handle *och)
439 struct inode *inode = file->f_dentry->d_inode;
440 struct ll_inode_info *lli = ll_i2info(inode);
443 LASSERT(!LUSTRE_FPRIVATE(file));
448 struct ptlrpc_request *req = it->d.lustre.it_data;
449 struct mdt_body *body;
452 rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, lli, it, och);
456 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
457 if ((it->it_flags & FMODE_WRITE) &&
458 (body->valid & OBD_MD_FLSIZE))
459 CDEBUG(D_INODE, "Epoch "LPU64" opened on "DFID"\n",
460 lli->lli_ioepoch, PFID(&lli->lli_fid));
463 LUSTRE_FPRIVATE(file) = fd;
464 ll_readahead_init(inode, &fd->fd_ras);
465 fd->fd_omode = it->it_flags;
469 /* Open a file, and (for the very first open) create objects on the OSTs at
470 * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object
471 * creation or open until ll_lov_setstripe() ioctl is called. We grab
472 * lli_open_sem to ensure no other process will create objects, send the
473 * stripe MD to the MDS, or try to destroy the objects if that fails.
475 * If we already have the stripe MD locally then we don't request it in
476 * md_open(), by passing a lmm_size = 0.
478 * It is up to the application to ensure no other processes open this file
479 * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
480 * used. We might be able to avoid races of that sort by getting lli_open_sem
481 * before returning in the O_LOV_DELAY_CREATE case and dropping it here
482 * or in ll_file_release(), but I'm not sure that is desirable/necessary.
484 int ll_file_open(struct inode *inode, struct file *file)
486 struct ll_inode_info *lli = ll_i2info(inode);
487 struct lookup_intent *it, oit = { .it_op = IT_OPEN,
488 .it_flags = file->f_flags };
489 struct lov_stripe_md *lsm;
490 struct ptlrpc_request *req = NULL;
491 struct obd_client_handle **och_p;
493 struct ll_file_data *fd;
494 int rc = 0, opendir_set = 0;
497 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), flags %o\n", inode->i_ino,
498 inode->i_generation, inode, file->f_flags);
500 #ifdef HAVE_VFS_INTENT_PATCHES
503 it = file->private_data; /* XXX: compat macro */
504 file->private_data = NULL; /* prevent ll_local_open assertion */
507 fd = ll_file_data_get();
511 if (S_ISDIR(inode->i_mode)) {
512 spin_lock(&lli->lli_lock);
513 /* "lli->lli_opendir_pid != 0" means someone has set it.
514 * "lli->lli_sai != NULL" means the previous statahead has not
516 if (lli->lli_opendir_pid == 0 && lli->lli_sai == NULL) {
518 lli->lli_opendir_pid = cfs_curproc_pid();
519 lli->lli_opendir_key = fd;
520 } else if (unlikely(lli->lli_opendir_pid == cfs_curproc_pid())) {
521 /* Two cases for this:
522 * (1) The same process open such directory many times.
523 * (2) The old process opened the directory, and exited
524 * before its children processes. Then new process
525 * with the same pid opens such directory before the
526 * old process's children processes exit.
527 * Change the owner to the latest one. */
529 lli->lli_opendir_key = fd;
531 spin_unlock(&lli->lli_lock);
534 if (inode->i_sb->s_root == file->f_dentry) {
535 LUSTRE_FPRIVATE(file) = fd;
539 if (!it || !it->d.lustre.it_disposition) {
540 /* Convert f_flags into access mode. We cannot use file->f_mode,
541 * because everything but O_ACCMODE mask was stripped from
543 if ((oit.it_flags + 1) & O_ACCMODE)
545 if (file->f_flags & O_TRUNC)
546 oit.it_flags |= FMODE_WRITE;
548 /* kernel only call f_op->open in dentry_open. filp_open calls
549 * dentry_open after call to open_namei that checks permissions.
550 * Only nfsd_open call dentry_open directly without checking
551 * permissions and because of that this code below is safe. */
552 if (oit.it_flags & FMODE_WRITE)
553 oit.it_flags |= MDS_OPEN_OWNEROVERRIDE;
555 /* We do not want O_EXCL here, presumably we opened the file
556 * already? XXX - NFS implications? */
557 oit.it_flags &= ~O_EXCL;
563 /* Let's see if we have file open on MDS already. */
564 if (it->it_flags & FMODE_WRITE) {
565 och_p = &lli->lli_mds_write_och;
566 och_usecount = &lli->lli_open_fd_write_count;
567 } else if (it->it_flags & FMODE_EXEC) {
568 och_p = &lli->lli_mds_exec_och;
569 och_usecount = &lli->lli_open_fd_exec_count;
571 och_p = &lli->lli_mds_read_och;
572 och_usecount = &lli->lli_open_fd_read_count;
575 down(&lli->lli_och_sem);
576 if (*och_p) { /* Open handle is present */
577 if (it_disposition(it, DISP_OPEN_OPEN)) {
578 /* Well, there's extra open request that we do not need,
579 let's close it somehow. This will decref request. */
580 rc = it_open_error(DISP_OPEN_OPEN, it);
582 ll_file_data_put(fd);
583 GOTO(out_och_free, rc);
585 ll_release_openhandle(file->f_dentry, it);
586 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats,
591 rc = ll_local_open(file, it, fd, NULL);
593 up(&lli->lli_och_sem);
594 ll_file_data_put(fd);
598 LASSERT(*och_usecount == 0);
599 if (!it->d.lustre.it_disposition) {
600 /* We cannot just request lock handle now, new ELC code
601 means that one of other OPEN locks for this file
602 could be cancelled, and since blocking ast handler
603 would attempt to grab och_sem as well, that would
604 result in a deadlock */
605 up(&lli->lli_och_sem);
606 it->it_flags |= O_CHECK_STALE;
607 rc = ll_intent_file_open(file, NULL, 0, it);
608 it->it_flags &= ~O_CHECK_STALE;
610 ll_file_data_put(fd);
611 GOTO(out_openerr, rc);
614 /* Got some error? Release the request */
615 if (it->d.lustre.it_status < 0) {
616 req = it->d.lustre.it_data;
617 ptlrpc_req_finished(req);
619 md_set_lock_data(ll_i2sbi(inode)->ll_md_exp,
620 &it->d.lustre.it_lock_handle,
621 file->f_dentry->d_inode);
624 OBD_ALLOC(*och_p, sizeof (struct obd_client_handle));
626 ll_file_data_put(fd);
627 GOTO(out_och_free, rc = -ENOMEM);
630 req = it->d.lustre.it_data;
632 /* md_intent_lock() didn't get a request ref if there was an
633 * open error, so don't do cleanup on the request here
635 /* XXX (green): Should not we bail out on any error here, not
636 * just open error? */
637 rc = it_open_error(DISP_OPEN_OPEN, it);
639 ll_file_data_put(fd);
640 GOTO(out_och_free, rc);
643 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN, 1);
644 rc = ll_local_open(file, it, fd, *och_p);
646 up(&lli->lli_och_sem);
647 ll_file_data_put(fd);
648 GOTO(out_och_free, rc);
651 up(&lli->lli_och_sem);
653 /* Must do this outside lli_och_sem lock to prevent deadlock where
654 different kind of OPEN lock for this same inode gets cancelled
655 by ldlm_cancel_lru */
656 if (!S_ISREG(inode->i_mode))
663 if (file->f_flags & O_LOV_DELAY_CREATE ||
664 !(file->f_mode & FMODE_WRITE)) {
665 CDEBUG(D_INODE, "object creation was delayed\n");
669 file->f_flags &= ~O_LOV_DELAY_CREATE;
672 ptlrpc_req_finished(req);
674 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
678 OBD_FREE(*och_p, sizeof (struct obd_client_handle));
679 *och_p = NULL; /* OBD_FREE writes some magic there */
682 up(&lli->lli_och_sem);
684 if (opendir_set == 1) {
685 lli->lli_opendir_key = NULL;
686 lli->lli_opendir_pid = 0;
687 } else if (unlikely(opendir_set == 2)) {
688 ll_stop_statahead(inode, fd);
695 /* Fills the obdo with the attributes for the inode defined by lsm */
696 int ll_inode_getattr(struct inode *inode, struct obdo *obdo)
698 struct ptlrpc_request_set *set;
699 struct ll_inode_info *lli = ll_i2info(inode);
700 struct lov_stripe_md *lsm = lli->lli_smd;
702 struct obd_info oinfo = { { { 0 } } };
706 LASSERT(lsm != NULL);
710 oinfo.oi_oa->o_id = lsm->lsm_object_id;
711 oinfo.oi_oa->o_gr = lsm->lsm_object_gr;
712 oinfo.oi_oa->o_mode = S_IFREG;
713 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE |
714 OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
715 OBD_MD_FLBLKSZ | OBD_MD_FLATIME |
716 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
718 oinfo.oi_capa = ll_mdscapa_get(inode);
720 set = ptlrpc_prep_set();
722 CERROR("can't allocate ptlrpc set\n");
725 rc = obd_getattr_async(ll_i2dtexp(inode), &oinfo, set);
727 rc = ptlrpc_set_wait(set);
728 ptlrpc_set_destroy(set);
730 capa_put(oinfo.oi_capa);
734 oinfo.oi_oa->o_valid &= (OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ |
735 OBD_MD_FLATIME | OBD_MD_FLMTIME |
736 OBD_MD_FLCTIME | OBD_MD_FLSIZE);
738 obdo_refresh_inode(inode, oinfo.oi_oa, oinfo.oi_oa->o_valid);
739 CDEBUG(D_INODE, "objid "LPX64" size %Lu, blocks %llu, blksize %lu\n",
740 lli->lli_smd->lsm_object_id, i_size_read(inode),
741 (unsigned long long)inode->i_blocks,
742 (unsigned long)ll_inode_blksize(inode));
746 static int ll_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
748 struct ll_inode_info *lli = ll_i2info(inode);
749 struct lov_stripe_md *lsm = lli->lli_smd;
750 struct obd_export *exp = ll_i2dtexp(inode);
753 struct ldlm_lock *lock;
754 } key = { .name = KEY_LOCK_TO_STRIPE, .lock = lock };
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, lsm);
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);
2494 * Get size for inode for which FIEMAP mapping is requested.
2495 * Make the FIEMAP get_info call and returns the result.
2497 int ll_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap,
2500 struct obd_export *exp = ll_i2dtexp(inode);
2501 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
2502 struct ll_fiemap_info_key fm_key = { .name = KEY_FIEMAP, };
2503 int vallen = num_bytes;
2507 /* If the stripe_count > 1 and the application does not understand
2508 * DEVICE_ORDER flag, then it cannot interpret the extents correctly.
2510 if (lsm->lsm_stripe_count > 1 &&
2511 !(fiemap->fm_flags & FIEMAP_FLAG_DEVICE_ORDER))
2514 fm_key.oa.o_id = lsm->lsm_object_id;
2515 fm_key.oa.o_gr = lsm->lsm_object_gr;
2516 fm_key.oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
2518 obdo_from_inode(&fm_key.oa, inode, OBD_MD_FLFID | OBD_MD_FLGROUP |
2521 /* If filesize is 0, then there would be no objects for mapping */
2522 if (fm_key.oa.o_size == 0) {
2523 fiemap->fm_mapped_extents = 0;
2527 memcpy(&fm_key.fiemap, fiemap, sizeof(*fiemap));
2529 rc = obd_get_info(exp, sizeof(fm_key), &fm_key, &vallen, fiemap, lsm);
2531 CERROR("obd_get_info failed: rc = %d\n", rc);
2536 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
2539 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2543 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),cmd=%x\n", inode->i_ino,
2544 inode->i_generation, inode, cmd);
2545 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
2547 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
2548 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
2552 case LL_IOC_GETFLAGS:
2553 /* Get the current value of the file flags */
2554 return put_user(fd->fd_flags, (int *)arg);
2555 case LL_IOC_SETFLAGS:
2556 case LL_IOC_CLRFLAGS:
2557 /* Set or clear specific file flags */
2558 /* XXX This probably needs checks to ensure the flags are
2559 * not abused, and to handle any flag side effects.
2561 if (get_user(flags, (int *) arg))
2564 if (cmd == LL_IOC_SETFLAGS) {
2565 if ((flags & LL_FILE_IGNORE_LOCK) &&
2566 !(file->f_flags & O_DIRECT)) {
2567 CERROR("%s: unable to disable locking on "
2568 "non-O_DIRECT file\n", current->comm);
2572 fd->fd_flags |= flags;
2574 fd->fd_flags &= ~flags;
2577 case LL_IOC_LOV_SETSTRIPE:
2578 RETURN(ll_lov_setstripe(inode, file, arg));
2579 case LL_IOC_LOV_SETEA:
2580 RETURN(ll_lov_setea(inode, file, arg));
2581 case LL_IOC_LOV_GETSTRIPE:
2582 RETURN(ll_lov_getstripe(inode, arg));
2583 case LL_IOC_RECREATE_OBJ:
2584 RETURN(ll_lov_recreate_obj(inode, file, arg));
2585 case EXT3_IOC_FIEMAP: {
2586 struct ll_user_fiemap *fiemap_s;
2587 size_t num_bytes, ret_bytes;
2588 unsigned int extent_count;
2591 /* Get the extent count so we can calculate the size of
2592 * required fiemap buffer */
2593 if (get_user(extent_count,
2594 &((struct ll_user_fiemap __user *)arg)->fm_extent_count))
2596 num_bytes = sizeof(*fiemap_s) + (extent_count *
2597 sizeof(struct ll_fiemap_extent));
2598 OBD_VMALLOC(fiemap_s, num_bytes);
2599 if (fiemap_s == NULL)
2602 if (copy_from_user(fiemap_s,(struct ll_user_fiemap __user *)arg,
2604 GOTO(error, rc = -EFAULT);
2606 if (fiemap_s->fm_flags & ~LUSTRE_FIEMAP_FLAGS_COMPAT) {
2607 fiemap_s->fm_flags = fiemap_s->fm_flags &
2608 ~LUSTRE_FIEMAP_FLAGS_COMPAT;
2609 if (copy_to_user((char *)arg, fiemap_s,
2611 GOTO(error, rc = -EFAULT);
2613 GOTO(error, rc = -EBADR);
2616 /* If fm_extent_count is non-zero, read the first extent since
2617 * it is used to calculate end_offset and device from previous
2620 if (copy_from_user(&fiemap_s->fm_extents[0],
2621 (char __user *)arg + sizeof(*fiemap_s),
2622 sizeof(struct ll_fiemap_extent)))
2623 GOTO(error, rc = -EFAULT);
2626 if (fiemap_s->fm_flags & FIEMAP_FLAG_SYNC) {
2629 rc = filemap_fdatawrite(inode->i_mapping);
2634 rc = ll_fiemap(inode, fiemap_s, num_bytes);
2638 ret_bytes = sizeof(struct ll_user_fiemap);
2640 if (extent_count != 0)
2641 ret_bytes += (fiemap_s->fm_mapped_extents *
2642 sizeof(struct ll_fiemap_extent));
2644 if (copy_to_user((void *)arg, fiemap_s, ret_bytes))
2648 OBD_VFREE(fiemap_s, num_bytes);
2651 case EXT3_IOC_GETFLAGS:
2652 case EXT3_IOC_SETFLAGS:
2653 RETURN(ll_iocontrol(inode, file, cmd, arg));
2654 case EXT3_IOC_GETVERSION_OLD:
2655 case EXT3_IOC_GETVERSION:
2656 RETURN(put_user(inode->i_generation, (int *)arg));
2661 ftail = getname((const char *)arg);
2663 RETURN(PTR_ERR(ftail));
2664 rc = ll_file_join(inode, file, ftail);
2668 case LL_IOC_GROUP_LOCK:
2669 RETURN(ll_get_grouplock(inode, file, arg));
2670 case LL_IOC_GROUP_UNLOCK:
2671 RETURN(ll_put_grouplock(inode, file, arg));
2672 case IOC_OBD_STATFS:
2673 RETURN(ll_obd_statfs(inode, (void *)arg));
2675 /* We need to special case any other ioctls we want to handle,
2676 * to send them to the MDS/OST as appropriate and to properly
2677 * network encode the arg field.
2678 case EXT3_IOC_SETVERSION_OLD:
2679 case EXT3_IOC_SETVERSION:
2681 case LL_IOC_FLUSHCTX:
2682 RETURN(ll_flush_ctx(inode));
2687 ll_iocontrol_call(inode, file, cmd, arg, &err))
2690 RETURN(obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
2696 loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
2698 struct inode *inode = file->f_dentry->d_inode;
2699 struct ll_inode_info *lli = ll_i2info(inode);
2700 struct lov_stripe_md *lsm = lli->lli_smd;
2703 retval = offset + ((origin == 2) ? i_size_read(inode) :
2704 (origin == 1) ? file->f_pos : 0);
2705 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), to=%Lu=%#Lx(%s)\n",
2706 inode->i_ino, inode->i_generation, inode, retval, retval,
2707 origin == 2 ? "SEEK_END": origin == 1 ? "SEEK_CUR" : "SEEK_SET");
2708 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK, 1);
2710 if (origin == 2) { /* SEEK_END */
2711 int nonblock = 0, rc;
2713 if (file->f_flags & O_NONBLOCK)
2714 nonblock = LDLM_FL_BLOCK_NOWAIT;
2717 rc = ll_glimpse_size(inode, nonblock);
2722 ll_inode_size_lock(inode, 0);
2723 offset += i_size_read(inode);
2724 ll_inode_size_unlock(inode, 0);
2725 } else if (origin == 1) { /* SEEK_CUR */
2726 offset += file->f_pos;
2730 if (offset >= 0 && offset <= ll_file_maxbytes(inode)) {
2731 if (offset != file->f_pos) {
2732 file->f_pos = offset;
2733 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
2735 file->f_version = ++event;
2744 int ll_fsync(struct file *file, struct dentry *dentry, int data)
2746 struct inode *inode = dentry->d_inode;
2747 struct ll_inode_info *lli = ll_i2info(inode);
2748 struct lov_stripe_md *lsm = lli->lli_smd;
2749 struct ptlrpc_request *req;
2750 struct obd_capa *oc;
2753 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
2754 inode->i_generation, inode);
2755 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1);
2757 /* fsync's caller has already called _fdata{sync,write}, we want
2758 * that IO to finish before calling the osc and mdc sync methods */
2759 rc = filemap_fdatawait(inode->i_mapping);
2761 /* catch async errors that were recorded back when async writeback
2762 * failed for pages in this mapping. */
2763 err = lli->lli_async_rc;
2764 lli->lli_async_rc = 0;
2768 err = lov_test_and_clear_async_rc(lsm);
2773 oc = ll_mdscapa_get(inode);
2774 err = md_sync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), oc,
2780 ptlrpc_req_finished(req);
2787 RETURN(rc ? rc : -ENOMEM);
2789 oa->o_id = lsm->lsm_object_id;
2790 oa->o_gr = lsm->lsm_object_gr;
2791 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
2792 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
2793 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
2796 oc = ll_osscapa_get(inode, CAPA_OPC_OSS_WRITE);
2797 err = obd_sync(ll_i2sbi(inode)->ll_dt_exp, oa, lsm,
2798 0, OBD_OBJECT_EOF, oc);
2808 int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
2810 struct inode *inode = file->f_dentry->d_inode;
2811 struct ll_sb_info *sbi = ll_i2sbi(inode);
2812 struct ldlm_res_id res_id =
2813 { .name = { fid_seq(ll_inode2fid(inode)),
2814 fid_oid(ll_inode2fid(inode)),
2815 fid_ver(ll_inode2fid(inode)),
2817 struct ldlm_enqueue_info einfo = { LDLM_FLOCK, 0, NULL,
2818 ldlm_flock_completion_ast, NULL, file_lock };
2819 struct lustre_handle lockh = {0};
2820 ldlm_policy_data_t flock;
2825 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu file_lock=%p\n",
2826 inode->i_ino, file_lock);
2828 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK, 1);
2830 if (file_lock->fl_flags & FL_FLOCK) {
2831 LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK));
2832 /* set missing params for flock() calls */
2833 file_lock->fl_end = OFFSET_MAX;
2834 file_lock->fl_pid = current->tgid;
2836 flock.l_flock.pid = file_lock->fl_pid;
2837 flock.l_flock.start = file_lock->fl_start;
2838 flock.l_flock.end = file_lock->fl_end;
2840 switch (file_lock->fl_type) {
2842 einfo.ei_mode = LCK_PR;
2845 /* An unlock request may or may not have any relation to
2846 * existing locks so we may not be able to pass a lock handle
2847 * via a normal ldlm_lock_cancel() request. The request may even
2848 * unlock a byte range in the middle of an existing lock. In
2849 * order to process an unlock request we need all of the same
2850 * information that is given with a normal read or write record
2851 * lock request. To avoid creating another ldlm unlock (cancel)
2852 * message we'll treat a LCK_NL flock request as an unlock. */
2853 einfo.ei_mode = LCK_NL;
2856 einfo.ei_mode = LCK_PW;
2859 CERROR("unknown fcntl lock type: %d\n", file_lock->fl_type);
2874 flags = LDLM_FL_BLOCK_NOWAIT;
2880 flags = LDLM_FL_TEST_LOCK;
2881 /* Save the old mode so that if the mode in the lock changes we
2882 * can decrement the appropriate reader or writer refcount. */
2883 file_lock->fl_type = einfo.ei_mode;
2886 CERROR("unknown fcntl lock command: %d\n", cmd);
2890 CDEBUG(D_DLMTRACE, "inode=%lu, pid=%u, flags=%#x, mode=%u, "
2891 "start="LPU64", end="LPU64"\n", inode->i_ino, flock.l_flock.pid,
2892 flags, einfo.ei_mode, flock.l_flock.start, flock.l_flock.end);
2894 rc = ldlm_cli_enqueue(sbi->ll_md_exp, NULL, &einfo, &res_id,
2895 &flock, &flags, NULL, 0, NULL, &lockh, 0);
2896 if ((file_lock->fl_flags & FL_FLOCK) &&
2897 (rc == 0 || file_lock->fl_type == F_UNLCK))
2898 ll_flock_lock_file_wait(file, file_lock, (cmd == F_SETLKW));
2899 #ifdef HAVE_F_OP_FLOCK
2900 if ((file_lock->fl_flags & FL_POSIX) &&
2901 (rc == 0 || file_lock->fl_type == F_UNLCK) &&
2902 !(flags & LDLM_FL_TEST_LOCK))
2903 posix_lock_file_wait(file, file_lock);
2909 int ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock)
2916 int ll_have_md_lock(struct inode *inode, __u64 bits)
2918 struct lustre_handle lockh;
2919 ldlm_policy_data_t policy = { .l_inodebits = {bits}};
2927 fid = &ll_i2info(inode)->lli_fid;
2928 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
2930 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK;
2931 if (md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS, &policy,
2932 LCK_CR|LCK_CW|LCK_PR|LCK_PW, &lockh)) {
2938 ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits,
2939 struct lustre_handle *lockh)
2941 ldlm_policy_data_t policy = { .l_inodebits = {bits}};
2947 fid = &ll_i2info(inode)->lli_fid;
2948 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
2950 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
2951 rc = md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS, &policy,
2952 LCK_CR|LCK_CW|LCK_PR|LCK_PW, lockh);
2956 static int ll_inode_revalidate_fini(struct inode *inode, int rc) {
2957 if (rc == -ENOENT) { /* Already unlinked. Just update nlink
2958 * and return success */
2960 /* This path cannot be hit for regular files unless in
2961 * case of obscure races, so no need to to validate
2963 if (!S_ISREG(inode->i_mode) &&
2964 !S_ISDIR(inode->i_mode))
2969 CERROR("failure %d inode %lu\n", rc, inode->i_ino);
2977 int ll_inode_revalidate_it(struct dentry *dentry, struct lookup_intent *it)
2979 struct inode *inode = dentry->d_inode;
2980 struct ptlrpc_request *req = NULL;
2981 struct ll_sb_info *sbi;
2982 struct obd_export *exp;
2987 CERROR("REPORT THIS LINE TO PETER\n");
2990 sbi = ll_i2sbi(inode);
2992 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),name=%s\n",
2993 inode->i_ino, inode->i_generation, inode, dentry->d_name.name);
2995 exp = ll_i2mdexp(inode);
2997 if (exp->exp_connect_flags & OBD_CONNECT_ATTRFID) {
2998 struct lookup_intent oit = { .it_op = IT_GETATTR };
2999 struct md_op_data *op_data;
3001 /* Call getattr by fid, so do not provide name at all. */
3002 op_data = ll_prep_md_op_data(NULL, dentry->d_parent->d_inode,
3003 dentry->d_inode, NULL, 0, 0,
3004 LUSTRE_OPC_ANY, NULL);
3005 if (IS_ERR(op_data))
3006 RETURN(PTR_ERR(op_data));
3008 oit.it_flags |= O_CHECK_STALE;
3009 rc = md_intent_lock(exp, op_data, NULL, 0,
3010 /* we are not interested in name
3013 ll_md_blocking_ast, 0);
3014 ll_finish_md_op_data(op_data);
3015 oit.it_flags &= ~O_CHECK_STALE;
3017 rc = ll_inode_revalidate_fini(inode, rc);
3021 rc = ll_revalidate_it_finish(req, &oit, dentry);
3023 ll_intent_release(&oit);
3027 /* Unlinked? Unhash dentry, so it is not picked up later by
3028 do_lookup() -> ll_revalidate_it(). We cannot use d_drop
3029 here to preserve get_cwd functionality on 2.6.
3031 if (!dentry->d_inode->i_nlink) {
3032 spin_lock(&dcache_lock);
3033 ll_drop_dentry(dentry);
3034 spin_unlock(&dcache_lock);
3037 ll_lookup_finish_locks(&oit, dentry);
3038 } else if (!ll_have_md_lock(dentry->d_inode, MDS_INODELOCK_UPDATE |
3039 MDS_INODELOCK_LOOKUP)) {
3040 struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode);
3041 obd_valid valid = OBD_MD_FLGETATTR;
3042 struct obd_capa *oc;
3045 if (S_ISREG(inode->i_mode)) {
3046 rc = ll_get_max_mdsize(sbi, &ealen);
3049 valid |= OBD_MD_FLEASIZE | OBD_MD_FLMODEASIZE;
3051 /* Once OBD_CONNECT_ATTRFID is not supported, we can't find one
3052 * capa for this inode. Because we only keep capas of dirs
3054 oc = ll_mdscapa_get(inode);
3055 rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode), oc, valid,
3059 rc = ll_inode_revalidate_fini(inode, rc);
3063 rc = ll_prep_inode(&inode, req, NULL);
3068 /* if object not yet allocated, don't validate size */
3069 if (ll_i2info(inode)->lli_smd == NULL)
3072 /* ll_glimpse_size will prefer locally cached writes if they extend
3074 rc = ll_glimpse_size(inode, 0);
3077 ptlrpc_req_finished(req);
3081 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
3082 struct lookup_intent *it, struct kstat *stat)
3084 struct inode *inode = de->d_inode;
3087 res = ll_inode_revalidate_it(de, it);
3088 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETATTR, 1);
3093 stat->dev = inode->i_sb->s_dev;
3094 stat->ino = inode->i_ino;
3095 stat->mode = inode->i_mode;
3096 stat->nlink = inode->i_nlink;
3097 stat->uid = inode->i_uid;
3098 stat->gid = inode->i_gid;
3099 stat->rdev = kdev_t_to_nr(inode->i_rdev);
3100 stat->atime = inode->i_atime;
3101 stat->mtime = inode->i_mtime;
3102 stat->ctime = inode->i_ctime;
3103 #ifdef HAVE_INODE_BLKSIZE
3104 stat->blksize = inode->i_blksize;
3106 stat->blksize = 1 << inode->i_blkbits;
3109 ll_inode_size_lock(inode, 0);
3110 stat->size = i_size_read(inode);
3111 stat->blocks = inode->i_blocks;
3112 ll_inode_size_unlock(inode, 0);
3116 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
3118 struct lookup_intent it = { .it_op = IT_GETATTR };
3120 return ll_getattr_it(mnt, de, &it, stat);
3124 int lustre_check_acl(struct inode *inode, int mask)
3126 #ifdef CONFIG_FS_POSIX_ACL
3127 struct ll_inode_info *lli = ll_i2info(inode);
3128 struct posix_acl *acl;
3132 spin_lock(&lli->lli_lock);
3133 acl = posix_acl_dup(lli->lli_posix_acl);
3134 spin_unlock(&lli->lli_lock);
3139 rc = posix_acl_permission(inode, acl, mask);
3140 posix_acl_release(acl);
3148 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10))
3149 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
3151 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
3152 inode->i_ino, inode->i_generation, inode, mask);
3153 if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
3154 return lustre_check_remote_perm(inode, mask);
3156 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
3157 return generic_permission(inode, mask, lustre_check_acl);
3160 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
3162 int mode = inode->i_mode;
3165 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
3166 inode->i_ino, inode->i_generation, inode, mask);
3168 if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
3169 return lustre_check_remote_perm(inode, mask);
3171 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
3173 if ((mask & MAY_WRITE) && IS_RDONLY(inode) &&
3174 (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
3176 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
3178 if (current->fsuid == inode->i_uid) {
3181 if (((mode >> 3) & mask & S_IRWXO) != mask)
3183 rc = lustre_check_acl(inode, mask);
3187 goto check_capabilities;
3191 if (in_group_p(inode->i_gid))
3194 if ((mode & mask & S_IRWXO) == mask)
3198 if (!(mask & MAY_EXEC) ||
3199 (inode->i_mode & S_IXUGO) || S_ISDIR(inode->i_mode))
3200 if (capable(CAP_DAC_OVERRIDE))
3203 if (capable(CAP_DAC_READ_SEARCH) && ((mask == MAY_READ) ||
3204 (S_ISDIR(inode->i_mode) && !(mask & MAY_WRITE))))
3211 /* -o localflock - only provides locally consistent flock locks */
3212 struct file_operations ll_file_operations = {
3213 .read = ll_file_read,
3214 .write = ll_file_write,
3215 .ioctl = ll_file_ioctl,
3216 .open = ll_file_open,
3217 .release = ll_file_release,
3218 .mmap = ll_file_mmap,
3219 .llseek = ll_file_seek,
3220 .sendfile = ll_file_sendfile,
3224 struct file_operations ll_file_operations_flock = {
3225 .read = ll_file_read,
3226 .write = ll_file_write,
3227 .ioctl = ll_file_ioctl,
3228 .open = ll_file_open,
3229 .release = ll_file_release,
3230 .mmap = ll_file_mmap,
3231 .llseek = ll_file_seek,
3232 .sendfile = ll_file_sendfile,
3234 #ifdef HAVE_F_OP_FLOCK
3235 .flock = ll_file_flock,
3237 .lock = ll_file_flock
3240 /* These are for -o noflock - to return ENOSYS on flock calls */
3241 struct file_operations ll_file_operations_noflock = {
3242 .read = ll_file_read,
3243 .write = ll_file_write,
3244 .ioctl = ll_file_ioctl,
3245 .open = ll_file_open,
3246 .release = ll_file_release,
3247 .mmap = ll_file_mmap,
3248 .llseek = ll_file_seek,
3249 .sendfile = ll_file_sendfile,
3251 #ifdef HAVE_F_OP_FLOCK
3252 .flock = ll_file_noflock,
3254 .lock = ll_file_noflock
3257 struct inode_operations ll_file_inode_operations = {
3258 #ifdef HAVE_VFS_INTENT_PATCHES
3259 .setattr_raw = ll_setattr_raw,
3261 .setattr = ll_setattr,
3262 .truncate = ll_truncate,
3263 .getattr = ll_getattr,
3264 .permission = ll_inode_permission,
3265 .setxattr = ll_setxattr,
3266 .getxattr = ll_getxattr,
3267 .listxattr = ll_listxattr,
3268 .removexattr = ll_removexattr,
3271 /* dynamic ioctl number support routins */
3272 static struct llioc_ctl_data {
3273 struct rw_semaphore ioc_sem;
3274 struct list_head ioc_head;
3276 __RWSEM_INITIALIZER(llioc.ioc_sem),
3277 CFS_LIST_HEAD_INIT(llioc.ioc_head)
3282 struct list_head iocd_list;
3283 unsigned int iocd_size;
3284 llioc_callback_t iocd_cb;
3285 unsigned int iocd_count;
3286 unsigned int iocd_cmd[0];
3289 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd)
3292 struct llioc_data *in_data = NULL;
3295 if (cb == NULL || cmd == NULL ||
3296 count > LLIOC_MAX_CMD || count < 0)
3299 size = sizeof(*in_data) + count * sizeof(unsigned int);
3300 OBD_ALLOC(in_data, size);
3301 if (in_data == NULL)
3304 memset(in_data, 0, sizeof(*in_data));
3305 in_data->iocd_size = size;
3306 in_data->iocd_cb = cb;
3307 in_data->iocd_count = count;
3308 memcpy(in_data->iocd_cmd, cmd, sizeof(unsigned int) * count);
3310 down_write(&llioc.ioc_sem);
3311 list_add_tail(&in_data->iocd_list, &llioc.ioc_head);
3312 up_write(&llioc.ioc_sem);
3317 void ll_iocontrol_unregister(void *magic)
3319 struct llioc_data *tmp;
3324 down_write(&llioc.ioc_sem);
3325 list_for_each_entry(tmp, &llioc.ioc_head, iocd_list) {
3327 unsigned int size = tmp->iocd_size;
3329 list_del(&tmp->iocd_list);
3330 up_write(&llioc.ioc_sem);
3332 OBD_FREE(tmp, size);
3336 up_write(&llioc.ioc_sem);
3338 CWARN("didn't find iocontrol register block with magic: %p\n", magic);
3341 EXPORT_SYMBOL(ll_iocontrol_register);
3342 EXPORT_SYMBOL(ll_iocontrol_unregister);
3344 enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file,
3345 unsigned int cmd, unsigned long arg, int *rcp)
3347 enum llioc_iter ret = LLIOC_CONT;
3348 struct llioc_data *data;
3349 int rc = -EINVAL, i;
3351 down_read(&llioc.ioc_sem);
3352 list_for_each_entry(data, &llioc.ioc_head, iocd_list) {
3353 for (i = 0; i < data->iocd_count; i++) {
3354 if (cmd != data->iocd_cmd[i])
3357 ret = data->iocd_cb(inode, file, cmd, arg, data, &rc);
3361 if (ret == LLIOC_STOP)
3364 up_read(&llioc.ioc_sem);