1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
5 * Author: Peter Braam <braam@clusterfs.com>
6 * Author: Phil Schwan <phil@clusterfs.com>
7 * Author: Andreas Dilger <adilger@clusterfs.com>
9 * This file is part of Lustre, http://www.lustre.org.
11 * Lustre is free software; you can redistribute it and/or
12 * modify it under the terms of version 2 of the GNU General Public
13 * License as published by the Free Software Foundation.
15 * Lustre is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with Lustre; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #define DEBUG_SUBSYSTEM S_LLITE
26 #include <lustre_dlm.h>
27 #include <lustre_lite.h>
28 #include <lustre_mdc.h>
29 #include <linux/pagemap.h>
30 #include <linux/file.h>
31 #include "llite_internal.h"
33 /* also used by llite/special.c:ll_special_open() */
34 struct ll_file_data *ll_file_data_get(void)
36 struct ll_file_data *fd;
38 OBD_SLAB_ALLOC_PTR(fd, ll_file_data_slab);
42 static void ll_file_data_put(struct ll_file_data *fd)
45 OBD_SLAB_FREE_PTR(fd, ll_file_data_slab);
48 void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
49 struct lustre_handle *fh)
51 op_data->op_fid1 = ll_i2info(inode)->lli_fid;
52 op_data->op_attr.ia_mode = inode->i_mode;
53 op_data->op_attr.ia_atime = inode->i_atime;
54 op_data->op_attr.ia_mtime = inode->i_mtime;
55 op_data->op_attr.ia_ctime = inode->i_ctime;
56 op_data->op_attr.ia_size = i_size_read(inode);
57 op_data->op_attr_blocks = inode->i_blocks;
58 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = inode->i_flags;
59 op_data->op_ioepoch = ll_i2info(inode)->lli_ioepoch;
60 memcpy(&op_data->op_handle, fh, sizeof(op_data->op_handle));
61 op_data->op_capa1 = ll_mdscapa_get(inode);
64 static void ll_prepare_close(struct inode *inode, struct md_op_data *op_data,
65 struct obd_client_handle *och)
69 op_data->op_attr.ia_valid = ATTR_MODE | ATTR_ATIME_SET |
70 ATTR_MTIME_SET | ATTR_CTIME_SET;
72 if (!(och->och_flags & FMODE_WRITE))
75 if (!(ll_i2mdexp(inode)->exp_connect_flags & OBD_CONNECT_SOM) ||
76 !S_ISREG(inode->i_mode))
77 op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
79 ll_epoch_close(inode, op_data, &och, 0);
82 ll_pack_inode2opdata(inode, op_data, &och->och_fh);
86 static int ll_close_inode_openhandle(struct obd_export *md_exp,
88 struct obd_client_handle *och)
90 struct obd_export *exp = ll_i2mdexp(inode);
91 struct md_op_data *op_data;
92 struct ptlrpc_request *req = NULL;
93 struct obd_device *obd = class_exp2obd(exp);
100 * XXX: in case of LMV, is this correct to access
103 CERROR("Invalid MDC connection handle "LPX64"\n",
104 ll_i2mdexp(inode)->exp_handle.h_cookie);
109 * here we check if this is forced umount. If so this is called on
110 * canceling "open lock" and we do not call md_close() in this case, as
111 * it will not be successful, as import is already deactivated.
116 OBD_ALLOC_PTR(op_data);
118 GOTO(out, rc = -ENOMEM); // XXX We leak openhandle and request here.
120 ll_prepare_close(inode, op_data, och);
121 epoch_close = (op_data->op_flags & MF_EPOCH_CLOSE);
122 rc = md_close(md_exp, op_data, och->och_mod, &req);
127 /* This close must have the epoch closed. */
128 LASSERT(exp->exp_connect_flags & OBD_CONNECT_SOM);
129 LASSERT(epoch_close);
130 /* MDS has instructed us to obtain Size-on-MDS attribute from
131 * OSTs and send setattr to back to MDS. */
132 rc = ll_sizeonmds_update(inode, och->och_mod,
133 &och->och_fh, op_data->op_ioepoch);
135 CERROR("inode %lu mdc Size-on-MDS update failed: "
136 "rc = %d\n", inode->i_ino, rc);
140 CERROR("inode %lu mdc close failed: rc = %d\n",
143 ll_finish_md_op_data(op_data);
146 rc = ll_objects_destroy(req, inode);
148 CERROR("inode %lu ll_objects destroy: rc = %d\n",
155 if ((exp->exp_connect_flags & OBD_CONNECT_SOM) && !epoch_close &&
156 S_ISREG(inode->i_mode) && (och->och_flags & FMODE_WRITE)) {
157 ll_queue_done_writing(inode, LLIF_DONE_WRITING);
160 ptlrpc_close_replay_seq(req);
161 md_clear_open_replay_data(md_exp, och);
162 /* Free @och if it is not waiting for DONE_WRITING. */
163 och->och_fh.cookie = DEAD_HANDLE_MAGIC;
166 if (req) /* This is close request */
167 ptlrpc_req_finished(req);
171 int ll_md_real_close(struct inode *inode, int flags)
173 struct ll_inode_info *lli = ll_i2info(inode);
174 struct obd_client_handle **och_p;
175 struct obd_client_handle *och;
180 if (flags & FMODE_WRITE) {
181 och_p = &lli->lli_mds_write_och;
182 och_usecount = &lli->lli_open_fd_write_count;
183 } else if (flags & FMODE_EXEC) {
184 och_p = &lli->lli_mds_exec_och;
185 och_usecount = &lli->lli_open_fd_exec_count;
187 LASSERT(flags & FMODE_READ);
188 och_p = &lli->lli_mds_read_och;
189 och_usecount = &lli->lli_open_fd_read_count;
192 down(&lli->lli_och_sem);
193 if (*och_usecount) { /* There are still users of this handle, so
195 up(&lli->lli_och_sem);
200 up(&lli->lli_och_sem);
202 if (och) { /* There might be a race and somebody have freed this och
204 rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
211 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
214 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
215 struct ll_inode_info *lli = ll_i2info(inode);
219 /* clear group lock, if present */
220 if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
221 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
222 fd->fd_flags &= ~(LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK);
223 rc = ll_extent_unlock(fd, inode, lsm, LCK_GROUP,
227 /* Let's see if we have good enough OPEN lock on the file and if
228 we can skip talking to MDS */
229 if (file->f_dentry->d_inode) { /* Can this ever be false? */
231 int flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
232 struct lustre_handle lockh;
233 struct inode *inode = file->f_dentry->d_inode;
234 ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_OPEN}};
236 down(&lli->lli_och_sem);
237 if (fd->fd_omode & FMODE_WRITE) {
239 LASSERT(lli->lli_open_fd_write_count);
240 lli->lli_open_fd_write_count--;
241 } else if (fd->fd_omode & FMODE_EXEC) {
243 LASSERT(lli->lli_open_fd_exec_count);
244 lli->lli_open_fd_exec_count--;
247 LASSERT(lli->lli_open_fd_read_count);
248 lli->lli_open_fd_read_count--;
250 up(&lli->lli_och_sem);
252 if (!md_lock_match(md_exp, flags, ll_inode2fid(inode),
253 LDLM_IBITS, &policy, lockmode,
255 rc = ll_md_real_close(file->f_dentry->d_inode,
259 CERROR("Releasing a file %p with negative dentry %p. Name %s",
260 file, file->f_dentry, file->f_dentry->d_name.name);
263 LUSTRE_FPRIVATE(file) = NULL;
264 ll_file_data_put(fd);
265 ll_capa_close(inode);
270 int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm);
272 /* While this returns an error code, fput() the caller does not, so we need
273 * to make every effort to clean up all of our state here. Also, applications
274 * rarely check close errors and even if an error is returned they will not
275 * re-try the close call.
277 int ll_file_release(struct inode *inode, struct file *file)
279 struct ll_file_data *fd;
280 struct ll_sb_info *sbi = ll_i2sbi(inode);
281 struct ll_inode_info *lli = ll_i2info(inode);
282 struct lov_stripe_md *lsm = lli->lli_smd;
286 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
287 inode->i_generation, inode);
289 #ifdef CONFIG_FS_POSIX_ACL
290 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
291 inode == inode->i_sb->s_root->d_inode) {
292 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
295 if (unlikely(fd->fd_flags & LL_FILE_RMTACL)) {
296 fd->fd_flags &= ~LL_FILE_RMTACL;
297 rct_del(&sbi->ll_rct, cfs_curproc_pid());
298 et_search_free(&sbi->ll_et, cfs_curproc_pid());
303 if (inode->i_sb->s_root != file->f_dentry)
304 ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
305 fd = LUSTRE_FPRIVATE(file);
308 /* The last ref on @file, maybe not the the owner pid of statahead.
309 * Different processes can open the same dir, "ll_opendir_key" means:
310 * it is me that should stop the statahead thread. */
311 if (lli->lli_opendir_key == fd)
312 ll_stop_statahead(inode, fd);
314 if (inode->i_sb->s_root == file->f_dentry) {
315 LUSTRE_FPRIVATE(file) = NULL;
316 ll_file_data_put(fd);
321 lov_test_and_clear_async_rc(lsm);
322 lli->lli_async_rc = 0;
324 rc = ll_md_close(sbi->ll_md_exp, inode, file);
328 static int ll_intent_file_open(struct file *file, void *lmm,
329 int lmmsize, struct lookup_intent *itp)
331 struct ll_sb_info *sbi = ll_i2sbi(file->f_dentry->d_inode);
332 struct dentry *parent = file->f_dentry->d_parent;
333 const char *name = file->f_dentry->d_name.name;
334 const int len = file->f_dentry->d_name.len;
335 struct md_op_data *op_data;
336 struct ptlrpc_request *req;
343 /* Usually we come here only for NFSD, and we want open lock.
344 But we can also get here with pre 2.6.15 patchless kernels, and in
345 that case that lock is also ok */
346 /* We can also get here if there was cached open handle in revalidate_it
347 * but it disappeared while we were getting from there to ll_file_open.
348 * But this means this file was closed and immediatelly opened which
349 * makes a good candidate for using OPEN lock */
350 /* If lmmsize & lmm are not 0, we are just setting stripe info
351 * parameters. No need for the open lock */
352 if (!lmm && !lmmsize)
353 itp->it_flags |= MDS_OPEN_LOCK;
355 op_data = ll_prep_md_op_data(NULL, parent->d_inode,
356 file->f_dentry->d_inode, name, len,
357 O_RDWR, LUSTRE_OPC_ANY, NULL);
359 RETURN(PTR_ERR(op_data));
361 rc = md_intent_lock(sbi->ll_md_exp, op_data, lmm, lmmsize, itp,
362 0 /*unused */, &req, ll_md_blocking_ast, 0);
363 ll_finish_md_op_data(op_data);
365 /* reason for keep own exit path - don`t flood log
366 * with messages with -ESTALE errors.
368 if (!it_disposition(itp, DISP_OPEN_OPEN) ||
369 it_open_error(DISP_OPEN_OPEN, itp))
371 ll_release_openhandle(file->f_dentry, itp);
375 if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) {
376 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp);
377 CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc);
381 if (itp->d.lustre.it_lock_mode)
382 md_set_lock_data(sbi->ll_md_exp,
383 &itp->d.lustre.it_lock_handle,
384 file->f_dentry->d_inode);
386 rc = ll_prep_inode(&file->f_dentry->d_inode, req, NULL);
388 ptlrpc_req_finished(itp->d.lustre.it_data);
391 it_clear_disposition(itp, DISP_ENQ_COMPLETE);
392 ll_intent_drop_lock(itp);
397 static int ll_och_fill(struct obd_export *md_exp, struct ll_inode_info *lli,
398 struct lookup_intent *it, struct obd_client_handle *och)
400 struct ptlrpc_request *req = it->d.lustre.it_data;
401 struct mdt_body *body;
405 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
406 LASSERT(body != NULL); /* reply already checked out */
408 memcpy(&och->och_fh, &body->handle, sizeof(body->handle));
409 och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
410 och->och_fid = lli->lli_fid;
411 och->och_flags = it->it_flags;
412 lli->lli_ioepoch = body->ioepoch;
414 return md_set_open_replay_data(md_exp, och, req);
417 int ll_local_open(struct file *file, struct lookup_intent *it,
418 struct ll_file_data *fd, struct obd_client_handle *och)
420 struct inode *inode = file->f_dentry->d_inode;
421 struct ll_inode_info *lli = ll_i2info(inode);
424 LASSERT(!LUSTRE_FPRIVATE(file));
429 struct ptlrpc_request *req = it->d.lustre.it_data;
430 struct mdt_body *body;
433 rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, lli, it, och);
437 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
438 if ((it->it_flags & FMODE_WRITE) &&
439 (body->valid & OBD_MD_FLSIZE))
440 CDEBUG(D_INODE, "Epoch "LPU64" opened on "DFID"\n",
441 lli->lli_ioepoch, PFID(&lli->lli_fid));
444 LUSTRE_FPRIVATE(file) = fd;
445 ll_readahead_init(inode, &fd->fd_ras);
446 fd->fd_omode = it->it_flags;
450 /* Open a file, and (for the very first open) create objects on the OSTs at
451 * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object
452 * creation or open until ll_lov_setstripe() ioctl is called. We grab
453 * lli_open_sem to ensure no other process will create objects, send the
454 * stripe MD to the MDS, or try to destroy the objects if that fails.
456 * If we already have the stripe MD locally then we don't request it in
457 * md_open(), by passing a lmm_size = 0.
459 * It is up to the application to ensure no other processes open this file
460 * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
461 * used. We might be able to avoid races of that sort by getting lli_open_sem
462 * before returning in the O_LOV_DELAY_CREATE case and dropping it here
463 * or in ll_file_release(), but I'm not sure that is desirable/necessary.
465 int ll_file_open(struct inode *inode, struct file *file)
467 struct ll_inode_info *lli = ll_i2info(inode);
468 struct lookup_intent *it, oit = { .it_op = IT_OPEN,
469 .it_flags = file->f_flags };
470 struct lov_stripe_md *lsm;
471 struct ptlrpc_request *req = NULL;
472 struct obd_client_handle **och_p;
474 struct ll_file_data *fd;
475 int rc = 0, opendir_set = 0;
478 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), flags %o\n", inode->i_ino,
479 inode->i_generation, inode, file->f_flags);
481 #ifdef HAVE_VFS_INTENT_PATCHES
484 it = file->private_data; /* XXX: compat macro */
485 file->private_data = NULL; /* prevent ll_local_open assertion */
488 fd = ll_file_data_get();
492 if (S_ISDIR(inode->i_mode)) {
493 spin_lock(&lli->lli_lock);
494 /* "lli->lli_opendir_pid != 0" means someone has set it.
495 * "lli->lli_sai != NULL" means the previous statahead has not
497 if (lli->lli_opendir_pid == 0 && lli->lli_sai == NULL) {
499 lli->lli_opendir_pid = cfs_curproc_pid();
500 lli->lli_opendir_key = fd;
501 } else if (unlikely(lli->lli_opendir_pid == cfs_curproc_pid())) {
502 /* Two cases for this:
503 * (1) The same process open such directory many times.
504 * (2) The old process opened the directory, and exited
505 * before its children processes. Then new process
506 * with the same pid opens such directory before the
507 * old process's children processes exit.
508 * Change the owner to the latest one. */
510 lli->lli_opendir_key = fd;
512 spin_unlock(&lli->lli_lock);
515 if (inode->i_sb->s_root == file->f_dentry) {
516 LUSTRE_FPRIVATE(file) = fd;
520 if (!it || !it->d.lustre.it_disposition) {
521 /* Convert f_flags into access mode. We cannot use file->f_mode,
522 * because everything but O_ACCMODE mask was stripped from
524 if ((oit.it_flags + 1) & O_ACCMODE)
526 if (file->f_flags & O_TRUNC)
527 oit.it_flags |= FMODE_WRITE;
529 /* kernel only call f_op->open in dentry_open. filp_open calls
530 * dentry_open after call to open_namei that checks permissions.
531 * Only nfsd_open call dentry_open directly without checking
532 * permissions and because of that this code below is safe. */
533 if (oit.it_flags & FMODE_WRITE)
534 oit.it_flags |= MDS_OPEN_OWNEROVERRIDE;
536 /* We do not want O_EXCL here, presumably we opened the file
537 * already? XXX - NFS implications? */
538 oit.it_flags &= ~O_EXCL;
544 /* Let's see if we have file open on MDS already. */
545 if (it->it_flags & FMODE_WRITE) {
546 och_p = &lli->lli_mds_write_och;
547 och_usecount = &lli->lli_open_fd_write_count;
548 } else if (it->it_flags & FMODE_EXEC) {
549 och_p = &lli->lli_mds_exec_och;
550 och_usecount = &lli->lli_open_fd_exec_count;
552 och_p = &lli->lli_mds_read_och;
553 och_usecount = &lli->lli_open_fd_read_count;
556 down(&lli->lli_och_sem);
557 if (*och_p) { /* Open handle is present */
558 if (it_disposition(it, DISP_OPEN_OPEN)) {
559 /* Well, there's extra open request that we do not need,
560 let's close it somehow. This will decref request. */
561 rc = it_open_error(DISP_OPEN_OPEN, it);
563 ll_file_data_put(fd);
564 GOTO(out_och_free, rc);
566 ll_release_openhandle(file->f_dentry, it);
567 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats,
572 rc = ll_local_open(file, it, fd, NULL);
574 up(&lli->lli_och_sem);
575 ll_file_data_put(fd);
579 LASSERT(*och_usecount == 0);
580 if (!it->d.lustre.it_disposition) {
581 /* We cannot just request lock handle now, new ELC code
582 means that one of other OPEN locks for this file
583 could be cancelled, and since blocking ast handler
584 would attempt to grab och_sem as well, that would
585 result in a deadlock */
586 up(&lli->lli_och_sem);
587 it->it_flags |= O_CHECK_STALE;
588 rc = ll_intent_file_open(file, NULL, 0, it);
589 it->it_flags &= ~O_CHECK_STALE;
591 ll_file_data_put(fd);
592 GOTO(out_openerr, rc);
595 /* Got some error? Release the request */
596 if (it->d.lustre.it_status < 0) {
597 req = it->d.lustre.it_data;
598 ptlrpc_req_finished(req);
600 md_set_lock_data(ll_i2sbi(inode)->ll_md_exp,
601 &it->d.lustre.it_lock_handle,
602 file->f_dentry->d_inode);
605 OBD_ALLOC(*och_p, sizeof (struct obd_client_handle));
607 ll_file_data_put(fd);
608 GOTO(out_och_free, rc = -ENOMEM);
611 req = it->d.lustre.it_data;
613 /* md_intent_lock() didn't get a request ref if there was an
614 * open error, so don't do cleanup on the request here
616 /* XXX (green): Should not we bail out on any error here, not
617 * just open error? */
618 rc = it_open_error(DISP_OPEN_OPEN, it);
620 ll_file_data_put(fd);
621 GOTO(out_och_free, rc);
624 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN, 1);
625 rc = ll_local_open(file, it, fd, *och_p);
627 up(&lli->lli_och_sem);
628 ll_file_data_put(fd);
629 GOTO(out_och_free, rc);
632 up(&lli->lli_och_sem);
634 /* Must do this outside lli_och_sem lock to prevent deadlock where
635 different kind of OPEN lock for this same inode gets cancelled
636 by ldlm_cancel_lru */
637 if (!S_ISREG(inode->i_mode))
644 if (file->f_flags & O_LOV_DELAY_CREATE ||
645 !(file->f_mode & FMODE_WRITE)) {
646 CDEBUG(D_INODE, "object creation was delayed\n");
650 file->f_flags &= ~O_LOV_DELAY_CREATE;
653 ptlrpc_req_finished(req);
655 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
659 OBD_FREE(*och_p, sizeof (struct obd_client_handle));
660 *och_p = NULL; /* OBD_FREE writes some magic there */
663 up(&lli->lli_och_sem);
665 if (opendir_set == 1) {
666 lli->lli_opendir_key = NULL;
667 lli->lli_opendir_pid = 0;
668 } else if (unlikely(opendir_set == 2)) {
669 ll_stop_statahead(inode, fd);
676 /* Fills the obdo with the attributes for the inode defined by lsm */
677 int ll_inode_getattr(struct inode *inode, struct obdo *obdo)
679 struct ptlrpc_request_set *set;
680 struct ll_inode_info *lli = ll_i2info(inode);
681 struct lov_stripe_md *lsm = lli->lli_smd;
683 struct obd_info oinfo = { { { 0 } } };
687 LASSERT(lsm != NULL);
691 oinfo.oi_oa->o_id = lsm->lsm_object_id;
692 oinfo.oi_oa->o_gr = lsm->lsm_object_gr;
693 oinfo.oi_oa->o_mode = S_IFREG;
694 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE |
695 OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
696 OBD_MD_FLBLKSZ | OBD_MD_FLATIME |
697 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
699 oinfo.oi_capa = ll_mdscapa_get(inode);
701 set = ptlrpc_prep_set();
703 CERROR("can't allocate ptlrpc set\n");
706 rc = obd_getattr_async(ll_i2dtexp(inode), &oinfo, set);
708 rc = ptlrpc_set_wait(set);
709 ptlrpc_set_destroy(set);
711 capa_put(oinfo.oi_capa);
715 oinfo.oi_oa->o_valid &= (OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ |
716 OBD_MD_FLATIME | OBD_MD_FLMTIME |
717 OBD_MD_FLCTIME | OBD_MD_FLSIZE);
719 obdo_refresh_inode(inode, oinfo.oi_oa, oinfo.oi_oa->o_valid);
720 CDEBUG(D_INODE, "objid "LPX64" size %Lu, blocks %llu, blksize %lu\n",
721 lli->lli_smd->lsm_object_id, i_size_read(inode),
722 (unsigned long long)inode->i_blocks,
723 (unsigned long)ll_inode_blksize(inode));
727 static inline void ll_remove_suid(struct inode *inode)
731 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
732 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
734 /* was any of the uid bits set? */
735 mode &= inode->i_mode;
736 if (mode && !capable(CAP_FSETID)) {
737 inode->i_mode &= ~mode;
738 // XXX careful here - we cannot change the size
742 static int ll_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
744 struct ll_inode_info *lli = ll_i2info(inode);
745 struct lov_stripe_md *lsm = lli->lli_smd;
746 struct obd_export *exp = ll_i2dtexp(inode);
749 struct ldlm_lock *lock;
750 struct lov_stripe_md *lsm;
751 } key = { .name = KEY_LOCK_TO_STRIPE, .lock = lock, .lsm = lsm };
752 __u32 stripe, vallen = sizeof(stripe);
756 if (lsm->lsm_stripe_count == 1)
757 GOTO(check, stripe = 0);
759 /* get our offset in the lov */
760 rc = obd_get_info(exp, sizeof(key), &key, &vallen, &stripe);
762 CERROR("obd_get_info: rc = %d\n", rc);
765 LASSERT(stripe < lsm->lsm_stripe_count);
768 if (lsm->lsm_oinfo[stripe]->loi_id != lock->l_resource->lr_name.name[0]||
769 lsm->lsm_oinfo[stripe]->loi_gr != lock->l_resource->lr_name.name[2]){
770 LDLM_ERROR(lock, "resource doesn't match object "LPU64"/"LPU64,
771 lsm->lsm_oinfo[stripe]->loi_id,
772 lsm->lsm_oinfo[stripe]->loi_gr);
773 RETURN(-ELDLM_NO_LOCK_DATA);
779 /* Get extra page reference to ensure it is not going away */
780 void ll_pin_extent_cb(void *data)
782 struct page *page = data;
784 page_cache_get(page);
789 /* Flush the page from page cache for an extent as its canceled.
790 * Page to remove is delivered as @data.
792 * No one can dirty the extent until we've finished our work and they cannot
793 * enqueue another lock. The DLM protects us from ll_file_read/write here,
794 * but other kernel actors could have pages locked.
796 * If @discard is set, there is no need to write the page if it is dirty.
798 * Called with the DLM lock held. */
799 int ll_page_removal_cb(void *data, int discard)
802 struct page *page = data;
803 struct address_space *mapping;
807 /* We have page reference already from ll_pin_page */
810 /* Already truncated by somebody */
813 mapping = page->mapping;
815 ll_teardown_mmaps(mapping,
816 (__u64)page->index << PAGE_CACHE_SHIFT,
817 ((__u64)page->index<<PAGE_CACHE_SHIFT)|
819 LL_CDEBUG_PAGE(D_PAGE, page, "removing page\n");
821 if (!discard && clear_page_dirty_for_io(page)) {
822 LASSERT(page->mapping);
823 rc = ll_call_writepage(page->mapping->host, page);
824 /* either waiting for io to complete or reacquiring
825 * the lock that the failed writepage released */
827 wait_on_page_writeback(page);
829 CERROR("writepage inode %lu(%p) of page %p "
830 "failed: %d\n", mapping->host->i_ino,
831 mapping->host, page, rc);
833 set_bit(AS_ENOSPC, &mapping->flags);
835 set_bit(AS_EIO, &mapping->flags);
837 set_bit(AS_EIO, &mapping->flags);
839 if (page->mapping != NULL) {
840 struct ll_async_page *llap = llap_cast_private(page);
841 /* checking again to account for writeback's lock_page() */
842 LL_CDEBUG_PAGE(D_PAGE, page, "truncating\n");
844 ll_ra_accounting(llap, page->mapping);
845 ll_truncate_complete_page(page);
849 LASSERT(!PageWriteback(page));
851 page_cache_release(page);
856 int ll_extent_lock_cancel_cb(struct ldlm_lock *lock, struct ldlm_lock_desc *new,
857 void *data, int flag)
860 struct ll_inode_info *lli;
861 struct lov_stripe_md *lsm;
867 if ((unsigned long)data > 0 && (unsigned long)data < 0x1000) {
868 LDLM_ERROR(lock, "cancelling lock with bad data %p", data);
872 inode = ll_inode_from_lock(lock);
875 lli = ll_i2info(inode);
878 if (lli->lli_smd == NULL)
882 stripe = ll_lock_to_stripe_offset(inode, lock);
886 lov_stripe_lock(lsm);
887 lock_res_and_lock(lock);
888 kms = ldlm_extent_shift_kms(lock,
889 lsm->lsm_oinfo[stripe]->loi_kms);
891 if (lsm->lsm_oinfo[stripe]->loi_kms != kms)
892 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
893 lsm->lsm_oinfo[stripe]->loi_kms, kms);
894 lsm->lsm_oinfo[stripe]->loi_kms = kms;
895 unlock_res_and_lock(lock);
896 lov_stripe_unlock(lsm);
897 ll_queue_done_writing(inode, 0);
906 int ll_async_completion_ast(struct ldlm_lock *lock, int flags, void *data)
908 /* XXX ALLOCATE - 160 bytes */
909 struct inode *inode = ll_inode_from_lock(lock);
910 struct ll_inode_info *lli = ll_i2info(inode);
911 struct lustre_handle lockh = { 0 };
916 if (flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
917 LDLM_FL_BLOCK_CONV)) {
918 LBUG(); /* not expecting any blocked async locks yet */
919 LDLM_DEBUG(lock, "client-side async enqueue returned a blocked "
921 ldlm_lock_dump(D_OTHER, lock, 0);
922 ldlm_reprocess_all(lock->l_resource);
926 LDLM_DEBUG(lock, "client-side async enqueue: granted/glimpsed");
928 stripe = ll_lock_to_stripe_offset(inode, lock);
932 if (lock->l_lvb_len) {
933 struct lov_stripe_md *lsm = lli->lli_smd;
935 lvb = lock->l_lvb_data;
936 lsm->lsm_oinfo[stripe].loi_rss = lvb->lvb_size;
938 lock_res_and_lock(lock);
939 ll_inode_size_lock(inode, 1);
940 kms = MAX(lsm->lsm_oinfo[stripe].loi_kms, lvb->lvb_size);
941 kms = ldlm_extent_shift_kms(NULL, kms);
942 if (lsm->lsm_oinfo[stripe].loi_kms != kms)
943 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
944 lsm->lsm_oinfo[stripe].loi_kms, kms);
945 lsm->lsm_oinfo[stripe].loi_kms = kms;
946 ll_inode_size_unlock(inode, 1);
947 unlock_res_and_lock(lock);
952 wake_up(&lock->l_waitq);
954 ldlm_lock2handle(lock, &lockh);
955 ldlm_lock_decref(&lockh, LCK_PR);
960 static int ll_glimpse_callback(struct ldlm_lock *lock, void *reqp)
962 struct ptlrpc_request *req = reqp;
963 struct inode *inode = ll_inode_from_lock(lock);
964 struct ll_inode_info *lli;
965 struct lov_stripe_md *lsm;
971 GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
972 lli = ll_i2info(inode);
974 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
977 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
979 /* First, find out which stripe index this lock corresponds to. */
980 stripe = ll_lock_to_stripe_offset(inode, lock);
982 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
984 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
985 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
987 rc = req_capsule_server_pack(&req->rq_pill);
989 CERROR("lustre_pack_reply: %d\n", rc);
993 lvb = req_capsule_server_get(&req->rq_pill, &RMF_DLM_LVB);
994 lvb->lvb_size = lli->lli_smd->lsm_oinfo[stripe]->loi_kms;
995 lvb->lvb_mtime = LTIME_S(inode->i_mtime);
996 lvb->lvb_atime = LTIME_S(inode->i_atime);
997 lvb->lvb_ctime = LTIME_S(inode->i_ctime);
999 LDLM_DEBUG(lock, "i_size: %llu -> stripe number %u -> kms "LPU64
1000 " atime "LPU64", mtime "LPU64", ctime "LPU64,
1001 i_size_read(inode), stripe, lvb->lvb_size, lvb->lvb_mtime,
1002 lvb->lvb_atime, lvb->lvb_ctime);
1007 /* These errors are normal races, so we don't want to fill the console
1008 * with messages by calling ptlrpc_error() */
1009 if (rc == -ELDLM_NO_LOCK_DATA)
1010 lustre_pack_reply(req, 1, NULL, NULL);
1012 req->rq_status = rc;
1016 static int ll_merge_lvb(struct inode *inode)
1018 struct ll_inode_info *lli = ll_i2info(inode);
1019 struct ll_sb_info *sbi = ll_i2sbi(inode);
1025 ll_inode_size_lock(inode, 1);
1026 inode_init_lvb(inode, &lvb);
1027 rc = obd_merge_lvb(sbi->ll_dt_exp, lli->lli_smd, &lvb, 0);
1028 i_size_write(inode, lvb.lvb_size);
1029 inode->i_blocks = lvb.lvb_blocks;
1031 LTIME_S(inode->i_mtime) = lvb.lvb_mtime;
1032 LTIME_S(inode->i_atime) = lvb.lvb_atime;
1033 LTIME_S(inode->i_ctime) = lvb.lvb_ctime;
1034 ll_inode_size_unlock(inode, 1);
1039 int ll_local_size(struct inode *inode)
1041 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
1042 struct ll_inode_info *lli = ll_i2info(inode);
1043 struct ll_sb_info *sbi = ll_i2sbi(inode);
1044 struct lustre_handle lockh = { 0 };
1049 if (lli->lli_smd->lsm_stripe_count == 0)
1052 rc = obd_match(sbi->ll_dt_exp, lli->lli_smd, LDLM_EXTENT,
1053 &policy, LCK_PR, &flags, inode, &lockh);
1059 rc = ll_merge_lvb(inode);
1060 obd_cancel(sbi->ll_dt_exp, lli->lli_smd, LCK_PR, &lockh);
1064 int ll_glimpse_ioctl(struct ll_sb_info *sbi, struct lov_stripe_md *lsm,
1067 struct lustre_handle lockh = { 0 };
1068 struct ldlm_enqueue_info einfo = { 0 };
1069 struct obd_info oinfo = { { { 0 } } };
1075 einfo.ei_type = LDLM_EXTENT;
1076 einfo.ei_mode = LCK_PR;
1077 einfo.ei_cb_bl = osc_extent_blocking_cb;
1078 einfo.ei_cb_cp = ldlm_completion_ast;
1079 einfo.ei_cb_gl = ll_glimpse_callback;
1080 einfo.ei_cbdata = NULL;
1082 oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
1083 oinfo.oi_lockh = &lockh;
1085 oinfo.oi_flags = LDLM_FL_HAS_INTENT;
1087 rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
1091 CERROR("obd_enqueue returned rc %d, "
1092 "returning -EIO\n", rc);
1093 RETURN(rc > 0 ? -EIO : rc);
1096 lov_stripe_lock(lsm);
1097 memset(&lvb, 0, sizeof(lvb));
1098 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 0);
1099 st->st_size = lvb.lvb_size;
1100 st->st_blocks = lvb.lvb_blocks;
1101 st->st_mtime = lvb.lvb_mtime;
1102 st->st_atime = lvb.lvb_atime;
1103 st->st_ctime = lvb.lvb_ctime;
1104 lov_stripe_unlock(lsm);
1109 /* NB: obd_merge_lvb will prefer locally cached writes if they extend the
1110 * file (because it prefers KMS over RSS when larger) */
1111 int ll_glimpse_size(struct inode *inode, int ast_flags)
1113 struct ll_inode_info *lli = ll_i2info(inode);
1114 struct ll_sb_info *sbi = ll_i2sbi(inode);
1115 struct lustre_handle lockh = { 0 };
1116 struct ldlm_enqueue_info einfo = { 0 };
1117 struct obd_info oinfo = { { { 0 } } };
1121 if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
1124 CDEBUG(D_DLMTRACE, "Glimpsing inode %lu\n", inode->i_ino);
1126 if (!lli->lli_smd) {
1127 CDEBUG(D_DLMTRACE, "No objects for inode %lu\n", inode->i_ino);
1131 /* NOTE: this looks like DLM lock request, but it may not be one. Due
1132 * to LDLM_FL_HAS_INTENT flag, this is glimpse request, that
1133 * won't revoke any conflicting DLM locks held. Instead,
1134 * ll_glimpse_callback() will be called on each client
1135 * holding a DLM lock against this file, and resulting size
1136 * will be returned for each stripe. DLM lock on [0, EOF] is
1137 * acquired only if there were no conflicting locks. */
1138 einfo.ei_type = LDLM_EXTENT;
1139 einfo.ei_mode = LCK_PR;
1140 einfo.ei_cb_bl = osc_extent_blocking_cb;
1141 einfo.ei_cb_cp = ldlm_completion_ast;
1142 einfo.ei_cb_gl = ll_glimpse_callback;
1143 einfo.ei_cbdata = inode;
1145 oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
1146 oinfo.oi_lockh = &lockh;
1147 oinfo.oi_md = lli->lli_smd;
1148 oinfo.oi_flags = ast_flags | LDLM_FL_HAS_INTENT;
1150 rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
1154 CERROR("obd_enqueue returned rc %d, returning -EIO\n", rc);
1155 RETURN(rc > 0 ? -EIO : rc);
1158 rc = ll_merge_lvb(inode);
1160 CDEBUG(D_DLMTRACE, "glimpse: size: %llu, blocks: %llu\n",
1161 i_size_read(inode), (unsigned long long)inode->i_blocks);
1166 int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
1167 struct lov_stripe_md *lsm, int mode,
1168 ldlm_policy_data_t *policy, struct lustre_handle *lockh,
1171 struct ll_sb_info *sbi = ll_i2sbi(inode);
1173 struct ldlm_enqueue_info einfo = { 0 };
1174 struct obd_info oinfo = { { { 0 } } };
1178 LASSERT(!lustre_handle_is_used(lockh));
1179 LASSERT(lsm != NULL);
1181 /* don't drop the mmapped file to LRU */
1182 if (mapping_mapped(inode->i_mapping))
1183 ast_flags |= LDLM_FL_NO_LRU;
1185 /* XXX phil: can we do this? won't it screw the file size up? */
1186 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
1187 (sbi->ll_flags & LL_SBI_NOLCK))
1190 CDEBUG(D_DLMTRACE, "Locking inode %lu, start "LPU64" end "LPU64"\n",
1191 inode->i_ino, policy->l_extent.start, policy->l_extent.end);
1193 einfo.ei_type = LDLM_EXTENT;
1194 einfo.ei_mode = mode;
1195 einfo.ei_cb_bl = osc_extent_blocking_cb;
1196 einfo.ei_cb_cp = ldlm_completion_ast;
1197 einfo.ei_cb_gl = ll_glimpse_callback;
1198 einfo.ei_cbdata = inode;
1200 oinfo.oi_policy = *policy;
1201 oinfo.oi_lockh = lockh;
1203 oinfo.oi_flags = ast_flags;
1205 rc = obd_enqueue(sbi->ll_dt_exp, &oinfo, &einfo, NULL);
1206 *policy = oinfo.oi_policy;
1210 ll_inode_size_lock(inode, 1);
1211 inode_init_lvb(inode, &lvb);
1212 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
1214 if (policy->l_extent.start == 0 &&
1215 policy->l_extent.end == OBD_OBJECT_EOF) {
1216 /* vmtruncate()->ll_truncate() first sets the i_size and then
1217 * the kms under both a DLM lock and the
1218 * ll_inode_size_lock(). If we don't get the
1219 * ll_inode_size_lock() here we can match the DLM lock and
1220 * reset i_size from the kms before the truncating path has
1221 * updated the kms. generic_file_write can then trust the
1222 * stale i_size when doing appending writes and effectively
1223 * cancel the result of the truncate. Getting the
1224 * ll_inode_size_lock() after the enqueue maintains the DLM
1225 * -> ll_inode_size_lock() acquiring order. */
1226 i_size_write(inode, lvb.lvb_size);
1227 CDEBUG(D_INODE, "inode=%lu, updating i_size %llu\n",
1228 inode->i_ino, i_size_read(inode));
1232 LTIME_S(inode->i_mtime) = lvb.lvb_mtime;
1233 LTIME_S(inode->i_atime) = lvb.lvb_atime;
1234 LTIME_S(inode->i_ctime) = lvb.lvb_ctime;
1236 ll_inode_size_unlock(inode, 1);
1241 int ll_extent_unlock(struct ll_file_data *fd, struct inode *inode,
1242 struct lov_stripe_md *lsm, int mode,
1243 struct lustre_handle *lockh)
1245 struct ll_sb_info *sbi = ll_i2sbi(inode);
1249 /* XXX phil: can we do this? won't it screw the file size up? */
1250 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
1251 (sbi->ll_flags & LL_SBI_NOLCK))
1254 rc = obd_cancel(sbi->ll_dt_exp, lsm, mode, lockh);
1259 static void ll_set_file_contended(struct inode *inode)
1261 struct ll_inode_info *lli = ll_i2info(inode);
1262 cfs_time_t now = cfs_time_current();
1264 spin_lock(&lli->lli_lock);
1265 lli->lli_contention_time = now;
1266 lli->lli_flags |= LLIF_CONTENDED;
1267 spin_unlock(&lli->lli_lock);
1270 void ll_clear_file_contended(struct inode *inode)
1272 struct ll_inode_info *lli = ll_i2info(inode);
1274 spin_lock(&lli->lli_lock);
1275 lli->lli_flags &= ~LLIF_CONTENDED;
1276 spin_unlock(&lli->lli_lock);
1279 static int ll_is_file_contended(struct file *file)
1281 struct inode *inode = file->f_dentry->d_inode;
1282 struct ll_inode_info *lli = ll_i2info(inode);
1283 struct ll_sb_info *sbi = ll_i2sbi(inode);
1284 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1287 if (!(sbi->ll_lco.lco_flags & OBD_CONNECT_SRVLOCK)) {
1288 CDEBUG(D_INFO, "the server does not support SRVLOCK feature,"
1289 " osc connect flags = 0x"LPX64"\n",
1290 sbi->ll_lco.lco_flags);
1293 if (fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK))
1295 if (lli->lli_flags & LLIF_CONTENDED) {
1296 cfs_time_t cur_time = cfs_time_current();
1297 cfs_time_t retry_time;
1299 retry_time = cfs_time_add(
1300 lli->lli_contention_time,
1301 cfs_time_seconds(sbi->ll_contention_time));
1302 if (cfs_time_after(cur_time, retry_time)) {
1303 ll_clear_file_contended(inode);
1311 static int ll_file_get_tree_lock(struct ll_lock_tree *tree, struct file *file,
1312 const char *buf, size_t count,
1313 loff_t start, loff_t end, int rw)
1316 int tree_locked = 0;
1318 struct inode * inode = file->f_dentry->d_inode;
1321 append = (rw == OBD_BRW_WRITE) && (file->f_flags & O_APPEND);
1323 if (append || !ll_is_file_contended(file)) {
1324 struct ll_lock_tree_node *node;
1327 ast_flags = append ? 0 : LDLM_FL_DENY_ON_CONTENTION;
1328 if (file->f_flags & O_NONBLOCK)
1329 ast_flags |= LDLM_FL_BLOCK_NOWAIT;
1330 node = ll_node_from_inode(inode, start, end,
1331 (rw == OBD_BRW_WRITE) ? LCK_PW : LCK_PR);
1336 tree->lt_fd = LUSTRE_FPRIVATE(file);
1337 rc = ll_tree_lock(tree, node, buf, count, ast_flags);
1340 else if (rc == -EUSERS)
1341 ll_set_file_contended(inode);
1345 RETURN(tree_locked);
1350 static int ll_reget_short_lock(struct page *page, int rw,
1351 obd_off start, obd_off end,
1354 struct ll_async_page *llap;
1355 struct obd_export *exp;
1356 struct inode *inode = page->mapping->host;
1360 exp = ll_i2dtexp(inode);
1364 llap = llap_cast_private(page);
1368 RETURN(obd_reget_short_lock(exp, ll_i2info(inode)->lli_smd,
1369 &llap->llap_cookie, rw, start, end,
1373 static void ll_release_short_lock(struct inode *inode, obd_off end,
1374 void *cookie, int rw)
1376 struct obd_export *exp;
1379 exp = ll_i2dtexp(inode);
1383 rc = obd_release_short_lock(exp, ll_i2info(inode)->lli_smd, end,
1386 CERROR("unlock failed (%d)\n", rc);
1389 static inline int ll_file_get_fast_lock(struct file *file,
1390 obd_off ppos, obd_off end,
1391 char *buf, void **cookie, int rw)
1398 if (!ll_region_mapped((unsigned long)buf, end - ppos)) {
1399 page = find_lock_page(file->f_dentry->d_inode->i_mapping,
1400 ppos >> CFS_PAGE_SHIFT);
1402 if (ll_reget_short_lock(page, rw, ppos, end, cookie))
1406 page_cache_release(page);
1413 static inline void ll_file_put_fast_lock(struct inode *inode, obd_off end,
1414 void *cookie, int rw)
1416 ll_release_short_lock(inode, end, cookie, rw);
1419 enum ll_lock_style {
1420 LL_LOCK_STYLE_NOLOCK = 0,
1421 LL_LOCK_STYLE_FASTLOCK = 1,
1422 LL_LOCK_STYLE_TREELOCK = 2
1425 static inline int ll_file_get_lock(struct file *file, obd_off ppos,
1426 obd_off end, char *buf, void **cookie,
1427 struct ll_lock_tree *tree, int rw)
1433 if (ll_file_get_fast_lock(file, ppos, end, buf, cookie, rw))
1434 RETURN(LL_LOCK_STYLE_FASTLOCK);
1436 rc = ll_file_get_tree_lock(tree, file, buf, ppos - end, ppos, end, rw);
1437 /* rc: 1 for tree lock, 0 for no lock, <0 for error */
1440 RETURN(LL_LOCK_STYLE_TREELOCK);
1442 RETURN(LL_LOCK_STYLE_NOLOCK);
1445 /* an error happened if we reached this point, rc = -errno here */
1449 static inline void ll_file_put_lock(struct inode *inode, obd_off end,
1450 enum ll_lock_style lock_style,
1451 void *cookie, struct ll_lock_tree *tree,
1455 switch (lock_style) {
1456 case LL_LOCK_STYLE_TREELOCK:
1457 ll_tree_unlock(tree);
1459 case LL_LOCK_STYLE_FASTLOCK:
1460 ll_file_put_fast_lock(inode, end, cookie, rw);
1463 CERROR("invalid locking style (%d)\n", lock_style);
1467 static ssize_t ll_file_read(struct file *file, char *buf, size_t count,
1470 struct inode *inode = file->f_dentry->d_inode;
1471 struct ll_inode_info *lli = ll_i2info(inode);
1472 struct lov_stripe_md *lsm = lli->lli_smd;
1473 struct ll_sb_info *sbi = ll_i2sbi(inode);
1474 struct ll_lock_tree tree;
1476 struct ll_ra_read bead;
1479 ssize_t retval, chunk, sum = 0;
1485 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1486 inode->i_ino, inode->i_generation, inode, count, *ppos);
1487 /* "If nbyte is 0, read() will return 0 and have no other results."
1488 * -- Single Unix Spec */
1492 ll_stats_ops_tally(sbi, LPROC_LL_READ_BYTES, count);
1495 /* Read on file with no objects should return zero-filled
1496 * buffers up to file size (we can get non-zero sizes with
1497 * mknod + truncate, then opening file for read. This is a
1498 * common pattern in NFS case, it seems). Bug 6243 */
1500 /* Since there are no objects on OSTs, we have nothing to get
1501 * lock on and so we are forced to access inode->i_size
1504 /* Read beyond end of file */
1505 if (*ppos >= i_size_read(inode))
1508 if (count > i_size_read(inode) - *ppos)
1509 count = i_size_read(inode) - *ppos;
1510 /* Make sure to correctly adjust the file pos pointer for
1512 notzeroed = clear_user(buf, count);
1520 if (sbi->ll_max_rw_chunk != 0) {
1521 /* first, let's know the end of the current stripe */
1523 obd_extent_calc(sbi->ll_dt_exp, lsm, OBD_CALC_STRIPE_END, &end);
1525 /* correct, the end is beyond the request */
1526 if (end > *ppos + count - 1)
1527 end = *ppos + count - 1;
1529 /* and chunk shouldn't be too large even if striping is wide */
1530 if (end - *ppos > sbi->ll_max_rw_chunk)
1531 end = *ppos + sbi->ll_max_rw_chunk - 1;
1533 end = *ppos + count - 1;
1536 lock_style = ll_file_get_lock(file, (obd_off)(*ppos), end,
1537 buf, &cookie, &tree, OBD_BRW_READ);
1539 GOTO(out, retval = lock_style);
1541 ll_inode_size_lock(inode, 1);
1543 * Consistency guarantees: following possibilities exist for the
1544 * relation between region being read and real file size at this
1547 * (A): the region is completely inside of the file;
1549 * (B-x): x bytes of region are inside of the file, the rest is
1552 * (C): the region is completely outside of the file.
1554 * This classification is stable under DLM lock acquired by
1555 * ll_tree_lock() above, because to change class, other client has to
1556 * take DLM lock conflicting with our lock. Also, any updates to
1557 * ->i_size by other threads on this client are serialized by
1558 * ll_inode_size_lock(). This guarantees that short reads are handled
1559 * correctly in the face of concurrent writes and truncates.
1561 inode_init_lvb(inode, &lvb);
1562 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
1564 if (*ppos + count - 1 > kms) {
1565 /* A glimpse is necessary to determine whether we return a
1566 * short read (B) or some zeroes at the end of the buffer (C) */
1567 ll_inode_size_unlock(inode, 1);
1568 retval = ll_glimpse_size(inode, LDLM_FL_BLOCK_GRANTED);
1570 if (lock_style != LL_LOCK_STYLE_NOLOCK)
1571 ll_file_put_lock(inode, end, lock_style,
1572 cookie, &tree, OBD_BRW_READ);
1576 /* region is within kms and, hence, within real file size (A).
1577 * We need to increase i_size to cover the read region so that
1578 * generic_file_read() will do its job, but that doesn't mean
1579 * the kms size is _correct_, it is only the _minimum_ size.
1580 * If someone does a stat they will get the correct size which
1581 * will always be >= the kms value here. b=11081 */
1582 if (i_size_read(inode) < kms)
1583 i_size_write(inode, kms);
1584 ll_inode_size_unlock(inode, 1);
1587 chunk = end - *ppos + 1;
1588 CDEBUG(D_INODE, "Read ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
1589 inode->i_ino, chunk, *ppos, i_size_read(inode));
1591 if (lock_style != LL_LOCK_STYLE_NOLOCK) {
1592 /* turn off the kernel's read-ahead */
1593 file->f_ra.ra_pages = 0;
1595 /* initialize read-ahead window once per syscall */
1598 bead.lrr_start = *ppos >> CFS_PAGE_SHIFT;
1599 bead.lrr_count = (count + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
1600 ll_ra_read_in(file, &bead);
1604 file_accessed(file);
1605 retval = generic_file_read(file, buf, chunk, ppos);
1606 ll_file_put_lock(inode, end, lock_style, cookie, &tree,
1609 retval = ll_file_lockless_io(file, buf, chunk, ppos, READ);
1612 ll_rw_stats_tally(sbi, current->pid, file, chunk, 0);
1618 if (retval == chunk && count > 0)
1624 ll_ra_read_ex(file, &bead);
1625 retval = (sum > 0) ? sum : retval;
1630 * Write to a file (through the page cache).
1632 static ssize_t ll_file_write(struct file *file, const char *buf, size_t count,
1635 struct inode *inode = file->f_dentry->d_inode;
1636 struct ll_sb_info *sbi = ll_i2sbi(inode);
1637 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1638 struct ll_lock_tree tree;
1639 loff_t maxbytes = ll_file_maxbytes(inode);
1640 loff_t lock_start, lock_end, end;
1641 ssize_t retval, chunk, sum = 0;
1645 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1646 inode->i_ino, inode->i_generation, inode, count, *ppos);
1648 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1650 /* POSIX, but surprised the VFS doesn't check this already */
1654 /* If file was opened for LL_IOC_LOV_SETSTRIPE but the ioctl wasn't
1655 * called on the file, don't fail the below assertion (bug 2388). */
1656 if (file->f_flags & O_LOV_DELAY_CREATE &&
1657 ll_i2info(inode)->lli_smd == NULL)
1660 LASSERT(ll_i2info(inode)->lli_smd != NULL);
1662 down(&ll_i2info(inode)->lli_write_sem);
1665 chunk = 0; /* just to fix gcc's warning */
1666 end = *ppos + count - 1;
1668 if (file->f_flags & O_APPEND) {
1670 lock_end = OBD_OBJECT_EOF;
1671 } else if (sbi->ll_max_rw_chunk != 0) {
1672 /* first, let's know the end of the current stripe */
1674 obd_extent_calc(sbi->ll_dt_exp, lsm, OBD_CALC_STRIPE_END,
1677 /* correct, the end is beyond the request */
1678 if (end > *ppos + count - 1)
1679 end = *ppos + count - 1;
1681 /* and chunk shouldn't be too large even if striping is wide */
1682 if (end - *ppos > sbi->ll_max_rw_chunk)
1683 end = *ppos + sbi->ll_max_rw_chunk - 1;
1688 lock_end = *ppos + count - 1;
1691 tree_locked = ll_file_get_tree_lock(&tree, file, buf, count,
1692 lock_start, lock_end, OBD_BRW_WRITE);
1693 if (tree_locked < 0)
1694 GOTO(out, retval = tree_locked);
1696 /* This is ok, g_f_w will overwrite this under i_sem if it races
1697 * with a local truncate, it just makes our maxbyte checking easier.
1698 * The i_size value gets updated in ll_extent_lock() as a consequence
1699 * of the [0,EOF] extent lock we requested above. */
1700 if (file->f_flags & O_APPEND) {
1701 *ppos = i_size_read(inode);
1702 end = *ppos + count - 1;
1705 if (*ppos >= maxbytes) {
1706 send_sig(SIGXFSZ, current, 0);
1707 GOTO(out_unlock, retval = -EFBIG);
1709 if (end > maxbytes - 1)
1712 /* generic_file_write handles O_APPEND after getting i_mutex */
1713 chunk = end - *ppos + 1;
1714 CDEBUG(D_INFO, "Writing inode %lu, "LPSZ" bytes, offset %Lu\n",
1715 inode->i_ino, chunk, *ppos);
1717 retval = generic_file_write(file, buf, chunk, ppos);
1719 retval = ll_file_lockless_io(file, (char*)buf, chunk,
1721 ll_rw_stats_tally(ll_i2sbi(inode), current->pid, file, chunk, 1);
1725 ll_tree_unlock(&tree);
1732 if (retval == chunk && count > 0)
1736 up(&ll_i2info(inode)->lli_write_sem);
1738 retval = (sum > 0) ? sum : retval;
1739 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_WRITE_BYTES,
1740 retval > 0 ? retval : 0);
1745 * Send file content (through pagecache) somewhere with helper
1747 static ssize_t ll_file_sendfile(struct file *in_file, loff_t *ppos,size_t count,
1748 read_actor_t actor, void *target)
1750 struct inode *inode = in_file->f_dentry->d_inode;
1751 struct ll_inode_info *lli = ll_i2info(inode);
1752 struct lov_stripe_md *lsm = lli->lli_smd;
1753 struct ll_lock_tree tree;
1754 struct ll_lock_tree_node *node;
1756 struct ll_ra_read bead;
1761 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1762 inode->i_ino, inode->i_generation, inode, count, *ppos);
1764 /* "If nbyte is 0, read() will return 0 and have no other results."
1765 * -- Single Unix Spec */
1769 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_READ_BYTES, count);
1770 /* turn off the kernel's read-ahead */
1771 in_file->f_ra.ra_pages = 0;
1773 /* File with no objects, nothing to lock */
1775 RETURN(generic_file_sendfile(in_file, ppos, count, actor, target));
1777 node = ll_node_from_inode(inode, *ppos, *ppos + count - 1, LCK_PR);
1779 RETURN(PTR_ERR(node));
1781 tree.lt_fd = LUSTRE_FPRIVATE(in_file);
1782 rc = ll_tree_lock(&tree, node, NULL, count,
1783 in_file->f_flags & O_NONBLOCK?LDLM_FL_BLOCK_NOWAIT:0);
1787 ll_clear_file_contended(inode);
1788 ll_inode_size_lock(inode, 1);
1790 * Consistency guarantees: following possibilities exist for the
1791 * relation between region being read and real file size at this
1794 * (A): the region is completely inside of the file;
1796 * (B-x): x bytes of region are inside of the file, the rest is
1799 * (C): the region is completely outside of the file.
1801 * This classification is stable under DLM lock acquired by
1802 * ll_tree_lock() above, because to change class, other client has to
1803 * take DLM lock conflicting with our lock. Also, any updates to
1804 * ->i_size by other threads on this client are serialized by
1805 * ll_inode_size_lock(). This guarantees that short reads are handled
1806 * correctly in the face of concurrent writes and truncates.
1808 inode_init_lvb(inode, &lvb);
1809 obd_merge_lvb(ll_i2sbi(inode)->ll_dt_exp, lsm, &lvb, 1);
1811 if (*ppos + count - 1 > kms) {
1812 /* A glimpse is necessary to determine whether we return a
1813 * short read (B) or some zeroes at the end of the buffer (C) */
1814 ll_inode_size_unlock(inode, 1);
1815 retval = ll_glimpse_size(inode, LDLM_FL_BLOCK_GRANTED);
1819 /* region is within kms and, hence, within real file size (A) */
1820 i_size_write(inode, kms);
1821 ll_inode_size_unlock(inode, 1);
1824 CDEBUG(D_INFO, "Send ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
1825 inode->i_ino, count, *ppos, i_size_read(inode));
1827 bead.lrr_start = *ppos >> CFS_PAGE_SHIFT;
1828 bead.lrr_count = (count + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
1829 ll_ra_read_in(in_file, &bead);
1831 file_accessed(in_file);
1832 retval = generic_file_sendfile(in_file, ppos, count, actor, target);
1833 ll_ra_read_ex(in_file, &bead);
1836 ll_tree_unlock(&tree);
1840 static int ll_lov_recreate_obj(struct inode *inode, struct file *file,
1843 struct ll_inode_info *lli = ll_i2info(inode);
1844 struct obd_export *exp = ll_i2dtexp(inode);
1845 struct ll_recreate_obj ucreatp;
1846 struct obd_trans_info oti = { 0 };
1847 struct obdo *oa = NULL;
1850 struct lov_stripe_md *lsm, *lsm2;
1853 if (!capable (CAP_SYS_ADMIN))
1856 rc = copy_from_user(&ucreatp, (struct ll_recreate_obj *)arg,
1857 sizeof(struct ll_recreate_obj));
1865 down(&lli->lli_size_sem);
1868 GOTO(out, rc = -ENOENT);
1869 lsm_size = sizeof(*lsm) + (sizeof(struct lov_oinfo) *
1870 (lsm->lsm_stripe_count));
1872 OBD_ALLOC(lsm2, lsm_size);
1874 GOTO(out, rc = -ENOMEM);
1876 oa->o_id = ucreatp.lrc_id;
1877 oa->o_gr = ucreatp.lrc_group;
1878 oa->o_nlink = ucreatp.lrc_ost_idx;
1879 oa->o_flags |= OBD_FL_RECREATE_OBJS;
1880 oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
1881 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
1882 OBD_MD_FLMTIME | OBD_MD_FLCTIME);
1884 memcpy(lsm2, lsm, lsm_size);
1885 rc = obd_create(exp, oa, &lsm2, &oti);
1887 OBD_FREE(lsm2, lsm_size);
1890 up(&lli->lli_size_sem);
1895 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
1896 int flags, struct lov_user_md *lum, int lum_size)
1898 struct ll_inode_info *lli = ll_i2info(inode);
1899 struct lov_stripe_md *lsm;
1900 struct lookup_intent oit = {.it_op = IT_OPEN, .it_flags = flags};
1904 down(&lli->lli_size_sem);
1907 up(&lli->lli_size_sem);
1908 CDEBUG(D_IOCTL, "stripe already exists for ino %lu\n",
1913 rc = ll_intent_file_open(file, lum, lum_size, &oit);
1916 if (it_disposition(&oit, DISP_LOOKUP_NEG))
1917 GOTO(out_req_free, rc = -ENOENT);
1918 rc = oit.d.lustre.it_status;
1920 GOTO(out_req_free, rc);
1922 ll_release_openhandle(file->f_dentry, &oit);
1925 up(&lli->lli_size_sem);
1926 ll_intent_release(&oit);
1929 ptlrpc_req_finished((struct ptlrpc_request *) oit.d.lustre.it_data);
1933 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
1934 struct lov_mds_md **lmmp, int *lmm_size,
1935 struct ptlrpc_request **request)
1937 struct ll_sb_info *sbi = ll_i2sbi(inode);
1938 struct mdt_body *body;
1939 struct lov_mds_md *lmm = NULL;
1940 struct ptlrpc_request *req = NULL;
1941 struct obd_capa *oc;
1944 rc = ll_get_max_mdsize(sbi, &lmmsize);
1948 oc = ll_mdscapa_get(inode);
1949 rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode),
1950 oc, filename, strlen(filename) + 1,
1951 OBD_MD_FLEASIZE | OBD_MD_FLDIREA, lmmsize,
1952 ll_i2suppgid(inode), &req);
1955 CDEBUG(D_INFO, "md_getattr_name failed "
1956 "on %s: rc %d\n", filename, rc);
1960 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1961 LASSERT(body != NULL); /* checked by mdc_getattr_name */
1963 lmmsize = body->eadatasize;
1965 if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
1967 GOTO(out, rc = -ENODATA);
1970 lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, lmmsize);
1971 LASSERT(lmm != NULL);
1974 * This is coming from the MDS, so is probably in
1975 * little endian. We convert it to host endian before
1976 * passing it to userspace.
1978 if (lmm->lmm_magic == __swab32(LOV_MAGIC)) {
1979 lustre_swab_lov_user_md((struct lov_user_md *)lmm);
1980 lustre_swab_lov_user_md_objects((struct lov_user_md *)lmm);
1981 } else if (lmm->lmm_magic == __swab32(LOV_MAGIC_JOIN)) {
1982 lustre_swab_lov_user_md_join((struct lov_user_md_join *)lmm);
1985 if (lmm->lmm_magic == LOV_MAGIC_JOIN) {
1986 struct lov_stripe_md *lsm;
1987 struct lov_user_md_join *lmj;
1988 int lmj_size, i, aindex = 0;
1990 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
1992 GOTO(out, rc = -ENOMEM);
1993 rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp, lsm);
1995 GOTO(out_free_memmd, rc);
1997 lmj_size = sizeof(struct lov_user_md_join) +
1998 lsm->lsm_stripe_count *
1999 sizeof(struct lov_user_ost_data_join);
2000 OBD_ALLOC(lmj, lmj_size);
2002 GOTO(out_free_memmd, rc = -ENOMEM);
2004 memcpy(lmj, lmm, sizeof(struct lov_user_md_join));
2005 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2006 struct lov_extent *lex =
2007 &lsm->lsm_array->lai_ext_array[aindex];
2009 if (lex->le_loi_idx + lex->le_stripe_count <= i)
2011 CDEBUG(D_INFO, "aindex %d i %d l_extent_start "
2012 LPU64" len %d\n", aindex, i,
2013 lex->le_start, (int)lex->le_len);
2014 lmj->lmm_objects[i].l_extent_start =
2017 if ((int)lex->le_len == -1)
2018 lmj->lmm_objects[i].l_extent_end = -1;
2020 lmj->lmm_objects[i].l_extent_end =
2021 lex->le_start + lex->le_len;
2022 lmj->lmm_objects[i].l_object_id =
2023 lsm->lsm_oinfo[i]->loi_id;
2024 lmj->lmm_objects[i].l_object_gr =
2025 lsm->lsm_oinfo[i]->loi_gr;
2026 lmj->lmm_objects[i].l_ost_gen =
2027 lsm->lsm_oinfo[i]->loi_ost_gen;
2028 lmj->lmm_objects[i].l_ost_idx =
2029 lsm->lsm_oinfo[i]->loi_ost_idx;
2031 lmm = (struct lov_mds_md *)lmj;
2034 obd_free_memmd(sbi->ll_dt_exp, &lsm);
2038 *lmm_size = lmmsize;
2043 static int ll_lov_setea(struct inode *inode, struct file *file,
2046 int flags = MDS_OPEN_HAS_OBJS | FMODE_WRITE;
2047 struct lov_user_md *lump;
2048 int lum_size = sizeof(struct lov_user_md) +
2049 sizeof(struct lov_user_ost_data);
2053 if (!capable (CAP_SYS_ADMIN))
2056 OBD_ALLOC(lump, lum_size);
2060 rc = copy_from_user(lump, (struct lov_user_md *)arg, lum_size);
2062 OBD_FREE(lump, lum_size);
2066 rc = ll_lov_setstripe_ea_info(inode, file, flags, lump, lum_size);
2068 OBD_FREE(lump, lum_size);
2072 static int ll_lov_setstripe(struct inode *inode, struct file *file,
2075 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
2077 int flags = FMODE_WRITE;
2080 /* Bug 1152: copy properly when this is no longer true */
2081 LASSERT(sizeof(lum) == sizeof(*lump));
2082 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lump->lmm_objects[0]));
2083 rc = copy_from_user(&lum, lump, sizeof(lum));
2087 rc = ll_lov_setstripe_ea_info(inode, file, flags, &lum, sizeof(lum));
2089 put_user(0, &lump->lmm_stripe_count);
2090 rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode),
2091 0, ll_i2info(inode)->lli_smd, lump);
2096 static int ll_lov_getstripe(struct inode *inode, unsigned long arg)
2098 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
2103 return obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode), 0, lsm,
2107 static int ll_get_grouplock(struct inode *inode, struct file *file,
2110 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2111 ldlm_policy_data_t policy = { .l_extent = { .start = 0,
2112 .end = OBD_OBJECT_EOF}};
2113 struct lustre_handle lockh = { 0 };
2114 struct ll_inode_info *lli = ll_i2info(inode);
2115 struct lov_stripe_md *lsm = lli->lli_smd;
2119 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
2123 policy.l_extent.gid = arg;
2124 if (file->f_flags & O_NONBLOCK)
2125 flags = LDLM_FL_BLOCK_NOWAIT;
2127 rc = ll_extent_lock(fd, inode, lsm, LCK_GROUP, &policy, &lockh, flags);
2131 fd->fd_flags |= LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK;
2133 memcpy(&fd->fd_cwlockh, &lockh, sizeof(lockh));
2138 static int ll_put_grouplock(struct inode *inode, struct file *file,
2141 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2142 struct ll_inode_info *lli = ll_i2info(inode);
2143 struct lov_stripe_md *lsm = lli->lli_smd;
2147 if (!(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
2148 /* Ugh, it's already unlocked. */
2152 if (fd->fd_gid != arg) /* Ugh? Unlocking with different gid? */
2155 fd->fd_flags &= ~(LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK);
2157 rc = ll_extent_unlock(fd, inode, lsm, LCK_GROUP, &fd->fd_cwlockh);
2162 memset(&fd->fd_cwlockh, 0, sizeof(fd->fd_cwlockh));
2167 static int join_sanity_check(struct inode *head, struct inode *tail)
2170 if ((ll_i2sbi(head)->ll_flags & LL_SBI_JOIN) == 0) {
2171 CERROR("server do not support join \n");
2174 if (!S_ISREG(tail->i_mode) || !S_ISREG(head->i_mode)) {
2175 CERROR("tail ino %lu and ino head %lu must be regular\n",
2176 head->i_ino, tail->i_ino);
2179 if (head->i_ino == tail->i_ino) {
2180 CERROR("file %lu can not be joined to itself \n", head->i_ino);
2183 if (i_size_read(head) % JOIN_FILE_ALIGN) {
2184 CERROR("hsize %llu must be times of 64K\n", i_size_read(head));
2190 static int join_file(struct inode *head_inode, struct file *head_filp,
2191 struct file *tail_filp)
2193 struct dentry *tail_dentry = tail_filp->f_dentry;
2194 struct lookup_intent oit = {.it_op = IT_OPEN,
2195 .it_flags = head_filp->f_flags|O_JOIN_FILE};
2196 struct ldlm_enqueue_info einfo = { LDLM_IBITS, LCK_CW,
2197 ll_md_blocking_ast, ldlm_completion_ast, NULL, NULL };
2199 struct lustre_handle lockh;
2200 struct md_op_data *op_data;
2205 tail_dentry = tail_filp->f_dentry;
2207 data = i_size_read(head_inode);
2208 op_data = ll_prep_md_op_data(NULL, head_inode,
2209 tail_dentry->d_parent->d_inode,
2210 tail_dentry->d_name.name,
2211 tail_dentry->d_name.len, 0,
2212 LUSTRE_OPC_ANY, &data);
2213 if (IS_ERR(op_data))
2214 RETURN(PTR_ERR(op_data));
2216 rc = md_enqueue(ll_i2mdexp(head_inode), &einfo, &oit,
2217 op_data, &lockh, NULL, 0, 0);
2219 ll_finish_md_op_data(op_data);
2223 rc = oit.d.lustre.it_status;
2225 if (rc < 0 || it_open_error(DISP_OPEN_OPEN, &oit)) {
2226 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, &oit);
2227 ptlrpc_req_finished((struct ptlrpc_request *)
2228 oit.d.lustre.it_data);
2232 if (oit.d.lustre.it_lock_mode) { /* If we got lock - release it right
2234 ldlm_lock_decref(&lockh, oit.d.lustre.it_lock_mode);
2235 oit.d.lustre.it_lock_mode = 0;
2237 ll_release_openhandle(head_filp->f_dentry, &oit);
2239 ll_intent_release(&oit);
2243 static int ll_file_join(struct inode *head, struct file *filp,
2244 char *filename_tail)
2246 struct inode *tail = NULL, *first = NULL, *second = NULL;
2247 struct dentry *tail_dentry;
2248 struct file *tail_filp, *first_filp, *second_filp;
2249 struct ll_lock_tree first_tree, second_tree;
2250 struct ll_lock_tree_node *first_node, *second_node;
2251 struct ll_inode_info *hlli = ll_i2info(head), *tlli;
2252 int rc = 0, cleanup_phase = 0;
2255 CDEBUG(D_VFSTRACE, "VFS Op:head=%lu/%u(%p) tail %s\n",
2256 head->i_ino, head->i_generation, head, filename_tail);
2258 tail_filp = filp_open(filename_tail, O_WRONLY, 0644);
2259 if (IS_ERR(tail_filp)) {
2260 CERROR("Can not open tail file %s", filename_tail);
2261 rc = PTR_ERR(tail_filp);
2264 tail = igrab(tail_filp->f_dentry->d_inode);
2266 tlli = ll_i2info(tail);
2267 tail_dentry = tail_filp->f_dentry;
2268 LASSERT(tail_dentry);
2271 /*reorder the inode for lock sequence*/
2272 first = head->i_ino > tail->i_ino ? head : tail;
2273 second = head->i_ino > tail->i_ino ? tail : head;
2274 first_filp = head->i_ino > tail->i_ino ? filp : tail_filp;
2275 second_filp = head->i_ino > tail->i_ino ? tail_filp : filp;
2277 CDEBUG(D_INFO, "reorder object from %lu:%lu to %lu:%lu \n",
2278 head->i_ino, tail->i_ino, first->i_ino, second->i_ino);
2279 first_node = ll_node_from_inode(first, 0, OBD_OBJECT_EOF, LCK_EX);
2280 if (IS_ERR(first_node)){
2281 rc = PTR_ERR(first_node);
2284 first_tree.lt_fd = first_filp->private_data;
2285 rc = ll_tree_lock(&first_tree, first_node, NULL, 0, 0);
2290 second_node = ll_node_from_inode(second, 0, OBD_OBJECT_EOF, LCK_EX);
2291 if (IS_ERR(second_node)){
2292 rc = PTR_ERR(second_node);
2295 second_tree.lt_fd = second_filp->private_data;
2296 rc = ll_tree_lock(&second_tree, second_node, NULL, 0, 0);
2301 rc = join_sanity_check(head, tail);
2305 rc = join_file(head, filp, tail_filp);
2309 switch (cleanup_phase) {
2311 ll_tree_unlock(&second_tree);
2312 obd_cancel_unused(ll_i2dtexp(second),
2313 ll_i2info(second)->lli_smd, 0, NULL);
2315 ll_tree_unlock(&first_tree);
2316 obd_cancel_unused(ll_i2dtexp(first),
2317 ll_i2info(first)->lli_smd, 0, NULL);
2319 filp_close(tail_filp, 0);
2322 if (head && rc == 0) {
2323 obd_free_memmd(ll_i2sbi(head)->ll_dt_exp,
2325 hlli->lli_smd = NULL;
2330 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2336 int ll_release_openhandle(struct dentry *dentry, struct lookup_intent *it)
2338 struct inode *inode = dentry->d_inode;
2339 struct obd_client_handle *och;
2345 /* Root ? Do nothing. */
2346 if (dentry->d_inode->i_sb->s_root == dentry)
2349 /* No open handle to close? Move away */
2350 if (!it_disposition(it, DISP_OPEN_OPEN))
2353 LASSERT(it_open_error(DISP_OPEN_OPEN, it) == 0);
2355 OBD_ALLOC(och, sizeof(*och));
2357 GOTO(out, rc = -ENOMEM);
2359 ll_och_fill(ll_i2sbi(inode)->ll_md_exp,
2360 ll_i2info(inode), it, och);
2362 rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
2365 /* this one is in place of ll_file_open */
2366 ptlrpc_req_finished(it->d.lustre.it_data);
2367 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
2371 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
2374 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2378 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),cmd=%x\n", inode->i_ino,
2379 inode->i_generation, inode, cmd);
2380 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
2382 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
2383 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
2387 case LL_IOC_GETFLAGS:
2388 /* Get the current value of the file flags */
2389 return put_user(fd->fd_flags, (int *)arg);
2390 case LL_IOC_SETFLAGS:
2391 case LL_IOC_CLRFLAGS:
2392 /* Set or clear specific file flags */
2393 /* XXX This probably needs checks to ensure the flags are
2394 * not abused, and to handle any flag side effects.
2396 if (get_user(flags, (int *) arg))
2399 if (cmd == LL_IOC_SETFLAGS) {
2400 if ((flags & LL_FILE_IGNORE_LOCK) &&
2401 !(file->f_flags & O_DIRECT)) {
2402 CERROR("%s: unable to disable locking on "
2403 "non-O_DIRECT file\n", current->comm);
2407 fd->fd_flags |= flags;
2409 fd->fd_flags &= ~flags;
2412 case LL_IOC_LOV_SETSTRIPE:
2413 RETURN(ll_lov_setstripe(inode, file, arg));
2414 case LL_IOC_LOV_SETEA:
2415 RETURN(ll_lov_setea(inode, file, arg));
2416 case LL_IOC_LOV_GETSTRIPE:
2417 RETURN(ll_lov_getstripe(inode, arg));
2418 case LL_IOC_RECREATE_OBJ:
2419 RETURN(ll_lov_recreate_obj(inode, file, arg));
2420 case EXT3_IOC_GETFLAGS:
2421 case EXT3_IOC_SETFLAGS:
2422 RETURN(ll_iocontrol(inode, file, cmd, arg));
2423 case EXT3_IOC_GETVERSION_OLD:
2424 case EXT3_IOC_GETVERSION:
2425 RETURN(put_user(inode->i_generation, (int *)arg));
2430 ftail = getname((const char *)arg);
2432 RETURN(PTR_ERR(ftail));
2433 rc = ll_file_join(inode, file, ftail);
2437 case LL_IOC_GROUP_LOCK:
2438 RETURN(ll_get_grouplock(inode, file, arg));
2439 case LL_IOC_GROUP_UNLOCK:
2440 RETURN(ll_put_grouplock(inode, file, arg));
2441 case IOC_OBD_STATFS:
2442 RETURN(ll_obd_statfs(inode, (void *)arg));
2444 /* We need to special case any other ioctls we want to handle,
2445 * to send them to the MDS/OST as appropriate and to properly
2446 * network encode the arg field.
2447 case EXT3_IOC_SETVERSION_OLD:
2448 case EXT3_IOC_SETVERSION:
2450 case LL_IOC_FLUSHCTX:
2451 RETURN(ll_flush_ctx(inode));
2456 ll_iocontrol_call(inode, file, cmd, arg, &err))
2459 RETURN(obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
2465 loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
2467 struct inode *inode = file->f_dentry->d_inode;
2468 struct ll_inode_info *lli = ll_i2info(inode);
2469 struct lov_stripe_md *lsm = lli->lli_smd;
2472 retval = offset + ((origin == 2) ? i_size_read(inode) :
2473 (origin == 1) ? file->f_pos : 0);
2474 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), to=%Lu=%#Lx(%s)\n",
2475 inode->i_ino, inode->i_generation, inode, retval, retval,
2476 origin == 2 ? "SEEK_END": origin == 1 ? "SEEK_CUR" : "SEEK_SET");
2477 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK, 1);
2479 if (origin == 2) { /* SEEK_END */
2480 int nonblock = 0, rc;
2482 if (file->f_flags & O_NONBLOCK)
2483 nonblock = LDLM_FL_BLOCK_NOWAIT;
2486 rc = ll_glimpse_size(inode, nonblock);
2491 ll_inode_size_lock(inode, 0);
2492 offset += i_size_read(inode);
2493 ll_inode_size_unlock(inode, 0);
2494 } else if (origin == 1) { /* SEEK_CUR */
2495 offset += file->f_pos;
2499 if (offset >= 0 && offset <= ll_file_maxbytes(inode)) {
2500 if (offset != file->f_pos) {
2501 file->f_pos = offset;
2502 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
2504 file->f_version = ++event;
2513 int ll_fsync(struct file *file, struct dentry *dentry, int data)
2515 struct inode *inode = dentry->d_inode;
2516 struct ll_inode_info *lli = ll_i2info(inode);
2517 struct lov_stripe_md *lsm = lli->lli_smd;
2518 struct ptlrpc_request *req;
2519 struct obd_capa *oc;
2522 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
2523 inode->i_generation, inode);
2524 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1);
2526 /* fsync's caller has already called _fdata{sync,write}, we want
2527 * that IO to finish before calling the osc and mdc sync methods */
2528 rc = filemap_fdatawait(inode->i_mapping);
2530 /* catch async errors that were recorded back when async writeback
2531 * failed for pages in this mapping. */
2532 err = lli->lli_async_rc;
2533 lli->lli_async_rc = 0;
2537 err = lov_test_and_clear_async_rc(lsm);
2542 oc = ll_mdscapa_get(inode);
2543 err = md_sync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), oc,
2549 ptlrpc_req_finished(req);
2556 RETURN(rc ? rc : -ENOMEM);
2558 oa->o_id = lsm->lsm_object_id;
2559 oa->o_gr = lsm->lsm_object_gr;
2560 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
2561 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
2562 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
2565 oc = ll_osscapa_get(inode, CAPA_OPC_OSS_WRITE);
2566 err = obd_sync(ll_i2sbi(inode)->ll_dt_exp, oa, lsm,
2567 0, OBD_OBJECT_EOF, oc);
2577 int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
2579 struct inode *inode = file->f_dentry->d_inode;
2580 struct ll_sb_info *sbi = ll_i2sbi(inode);
2581 struct ldlm_res_id res_id =
2582 { .name = { fid_seq(ll_inode2fid(inode)),
2583 fid_oid(ll_inode2fid(inode)),
2584 fid_ver(ll_inode2fid(inode)),
2586 struct ldlm_enqueue_info einfo = { LDLM_FLOCK, 0, NULL,
2587 ldlm_flock_completion_ast, NULL, file_lock };
2588 struct lustre_handle lockh = {0};
2589 ldlm_policy_data_t flock;
2594 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu file_lock=%p\n",
2595 inode->i_ino, file_lock);
2597 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK, 1);
2599 if (file_lock->fl_flags & FL_FLOCK) {
2600 LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK));
2601 /* set missing params for flock() calls */
2602 file_lock->fl_end = OFFSET_MAX;
2603 file_lock->fl_pid = current->tgid;
2605 flock.l_flock.pid = file_lock->fl_pid;
2606 flock.l_flock.start = file_lock->fl_start;
2607 flock.l_flock.end = file_lock->fl_end;
2609 switch (file_lock->fl_type) {
2611 einfo.ei_mode = LCK_PR;
2614 /* An unlock request may or may not have any relation to
2615 * existing locks so we may not be able to pass a lock handle
2616 * via a normal ldlm_lock_cancel() request. The request may even
2617 * unlock a byte range in the middle of an existing lock. In
2618 * order to process an unlock request we need all of the same
2619 * information that is given with a normal read or write record
2620 * lock request. To avoid creating another ldlm unlock (cancel)
2621 * message we'll treat a LCK_NL flock request as an unlock. */
2622 einfo.ei_mode = LCK_NL;
2625 einfo.ei_mode = LCK_PW;
2628 CERROR("unknown fcntl lock type: %d\n", file_lock->fl_type);
2643 flags = LDLM_FL_BLOCK_NOWAIT;
2649 flags = LDLM_FL_TEST_LOCK;
2650 /* Save the old mode so that if the mode in the lock changes we
2651 * can decrement the appropriate reader or writer refcount. */
2652 file_lock->fl_type = einfo.ei_mode;
2655 CERROR("unknown fcntl lock command: %d\n", cmd);
2659 CDEBUG(D_DLMTRACE, "inode=%lu, pid=%u, flags=%#x, mode=%u, "
2660 "start="LPU64", end="LPU64"\n", inode->i_ino, flock.l_flock.pid,
2661 flags, einfo.ei_mode, flock.l_flock.start, flock.l_flock.end);
2663 rc = ldlm_cli_enqueue(sbi->ll_md_exp, NULL, &einfo, &res_id,
2664 &flock, &flags, NULL, 0, NULL, &lockh, 0);
2665 if ((file_lock->fl_flags & FL_FLOCK) &&
2666 (rc == 0 || file_lock->fl_type == F_UNLCK))
2667 ll_flock_lock_file_wait(file, file_lock, (cmd == F_SETLKW));
2668 #ifdef HAVE_F_OP_FLOCK
2669 if ((file_lock->fl_flags & FL_POSIX) &&
2670 (rc == 0 || file_lock->fl_type == F_UNLCK) &&
2671 !(flags & LDLM_FL_TEST_LOCK))
2672 posix_lock_file_wait(file, file_lock);
2678 int ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock)
2685 int ll_have_md_lock(struct inode *inode, __u64 bits)
2687 struct lustre_handle lockh;
2688 ldlm_policy_data_t policy = { .l_inodebits = {bits}};
2696 fid = &ll_i2info(inode)->lli_fid;
2697 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
2699 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK;
2700 if (md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS, &policy,
2701 LCK_CR|LCK_CW|LCK_PR|LCK_PW, &lockh)) {
2707 ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits,
2708 struct lustre_handle *lockh)
2710 ldlm_policy_data_t policy = { .l_inodebits = {bits}};
2716 fid = &ll_i2info(inode)->lli_fid;
2717 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
2719 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
2720 rc = md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS, &policy,
2721 LCK_CR|LCK_CW|LCK_PR|LCK_PW, lockh);
2725 static int ll_inode_revalidate_fini(struct inode *inode, int rc) {
2726 if (rc == -ENOENT) { /* Already unlinked. Just update nlink
2727 * and return success */
2729 /* This path cannot be hit for regular files unless in
2730 * case of obscure races, so no need to to validate
2732 if (!S_ISREG(inode->i_mode) &&
2733 !S_ISDIR(inode->i_mode))
2738 CERROR("failure %d inode %lu\n", rc, inode->i_ino);
2746 int ll_inode_revalidate_it(struct dentry *dentry, struct lookup_intent *it)
2748 struct inode *inode = dentry->d_inode;
2749 struct ptlrpc_request *req = NULL;
2750 struct ll_sb_info *sbi;
2751 struct obd_export *exp;
2756 CERROR("REPORT THIS LINE TO PETER\n");
2759 sbi = ll_i2sbi(inode);
2761 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),name=%s\n",
2762 inode->i_ino, inode->i_generation, inode, dentry->d_name.name);
2764 exp = ll_i2mdexp(inode);
2766 if (exp->exp_connect_flags & OBD_CONNECT_ATTRFID) {
2767 struct lookup_intent oit = { .it_op = IT_GETATTR };
2768 struct md_op_data *op_data;
2770 /* Call getattr by fid, so do not provide name at all. */
2771 op_data = ll_prep_md_op_data(NULL, dentry->d_parent->d_inode,
2772 dentry->d_inode, NULL, 0, 0,
2773 LUSTRE_OPC_ANY, NULL);
2774 if (IS_ERR(op_data))
2775 RETURN(PTR_ERR(op_data));
2777 oit.it_flags |= O_CHECK_STALE;
2778 rc = md_intent_lock(exp, op_data, NULL, 0,
2779 /* we are not interested in name
2782 ll_md_blocking_ast, 0);
2783 ll_finish_md_op_data(op_data);
2784 oit.it_flags &= ~O_CHECK_STALE;
2786 rc = ll_inode_revalidate_fini(inode, rc);
2790 rc = ll_revalidate_it_finish(req, &oit, dentry);
2792 ll_intent_release(&oit);
2796 /* Unlinked? Unhash dentry, so it is not picked up later by
2797 do_lookup() -> ll_revalidate_it(). We cannot use d_drop
2798 here to preserve get_cwd functionality on 2.6.
2800 if (!dentry->d_inode->i_nlink) {
2801 spin_lock(&dcache_lock);
2802 ll_drop_dentry(dentry);
2803 spin_unlock(&dcache_lock);
2806 ll_lookup_finish_locks(&oit, dentry);
2807 } else if (!ll_have_md_lock(dentry->d_inode, MDS_INODELOCK_UPDATE |
2808 MDS_INODELOCK_LOOKUP)) {
2809 struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode);
2810 obd_valid valid = OBD_MD_FLGETATTR;
2811 struct obd_capa *oc;
2814 if (S_ISREG(inode->i_mode)) {
2815 rc = ll_get_max_mdsize(sbi, &ealen);
2818 valid |= OBD_MD_FLEASIZE | OBD_MD_FLMODEASIZE;
2820 /* Once OBD_CONNECT_ATTRFID is not supported, we can't find one
2821 * capa for this inode. Because we only keep capas of dirs
2823 oc = ll_mdscapa_get(inode);
2824 rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode), oc, valid,
2828 rc = ll_inode_revalidate_fini(inode, rc);
2832 rc = ll_prep_inode(&inode, req, NULL);
2837 /* if object not yet allocated, don't validate size */
2838 if (ll_i2info(inode)->lli_smd == NULL)
2841 /* ll_glimpse_size will prefer locally cached writes if they extend
2843 rc = ll_glimpse_size(inode, 0);
2846 ptlrpc_req_finished(req);
2850 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
2851 struct lookup_intent *it, struct kstat *stat)
2853 struct inode *inode = de->d_inode;
2856 res = ll_inode_revalidate_it(de, it);
2857 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETATTR, 1);
2862 stat->dev = inode->i_sb->s_dev;
2863 stat->ino = inode->i_ino;
2864 stat->mode = inode->i_mode;
2865 stat->nlink = inode->i_nlink;
2866 stat->uid = inode->i_uid;
2867 stat->gid = inode->i_gid;
2868 stat->rdev = kdev_t_to_nr(inode->i_rdev);
2869 stat->atime = inode->i_atime;
2870 stat->mtime = inode->i_mtime;
2871 stat->ctime = inode->i_ctime;
2872 #ifdef HAVE_INODE_BLKSIZE
2873 stat->blksize = inode->i_blksize;
2875 stat->blksize = 1 << inode->i_blkbits;
2878 ll_inode_size_lock(inode, 0);
2879 stat->size = i_size_read(inode);
2880 stat->blocks = inode->i_blocks;
2881 ll_inode_size_unlock(inode, 0);
2885 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
2887 struct lookup_intent it = { .it_op = IT_GETATTR };
2889 return ll_getattr_it(mnt, de, &it, stat);
2893 int lustre_check_acl(struct inode *inode, int mask)
2895 #ifdef CONFIG_FS_POSIX_ACL
2896 struct ll_inode_info *lli = ll_i2info(inode);
2897 struct posix_acl *acl;
2901 spin_lock(&lli->lli_lock);
2902 acl = posix_acl_dup(lli->lli_posix_acl);
2903 spin_unlock(&lli->lli_lock);
2908 rc = posix_acl_permission(inode, acl, mask);
2909 posix_acl_release(acl);
2917 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10))
2918 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
2920 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
2921 inode->i_ino, inode->i_generation, inode, mask);
2922 if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
2923 return lustre_check_remote_perm(inode, mask);
2925 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
2926 return generic_permission(inode, mask, lustre_check_acl);
2929 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
2931 int mode = inode->i_mode;
2934 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
2935 inode->i_ino, inode->i_generation, inode, mask);
2937 if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
2938 return lustre_check_remote_perm(inode, mask);
2940 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
2942 if ((mask & MAY_WRITE) && IS_RDONLY(inode) &&
2943 (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
2945 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
2947 if (current->fsuid == inode->i_uid) {
2950 if (((mode >> 3) & mask & S_IRWXO) != mask)
2952 rc = lustre_check_acl(inode, mask);
2956 goto check_capabilities;
2960 if (in_group_p(inode->i_gid))
2963 if ((mode & mask & S_IRWXO) == mask)
2967 if (!(mask & MAY_EXEC) ||
2968 (inode->i_mode & S_IXUGO) || S_ISDIR(inode->i_mode))
2969 if (capable(CAP_DAC_OVERRIDE))
2972 if (capable(CAP_DAC_READ_SEARCH) && ((mask == MAY_READ) ||
2973 (S_ISDIR(inode->i_mode) && !(mask & MAY_WRITE))))
2980 /* -o localflock - only provides locally consistent flock locks */
2981 struct file_operations ll_file_operations = {
2982 .read = ll_file_read,
2983 .write = ll_file_write,
2984 .ioctl = ll_file_ioctl,
2985 .open = ll_file_open,
2986 .release = ll_file_release,
2987 .mmap = ll_file_mmap,
2988 .llseek = ll_file_seek,
2989 .sendfile = ll_file_sendfile,
2993 struct file_operations ll_file_operations_flock = {
2994 .read = ll_file_read,
2995 .write = ll_file_write,
2996 .ioctl = ll_file_ioctl,
2997 .open = ll_file_open,
2998 .release = ll_file_release,
2999 .mmap = ll_file_mmap,
3000 .llseek = ll_file_seek,
3001 .sendfile = ll_file_sendfile,
3003 #ifdef HAVE_F_OP_FLOCK
3004 .flock = ll_file_flock,
3006 .lock = ll_file_flock
3009 /* These are for -o noflock - to return ENOSYS on flock calls */
3010 struct file_operations ll_file_operations_noflock = {
3011 .read = ll_file_read,
3012 .write = ll_file_write,
3013 .ioctl = ll_file_ioctl,
3014 .open = ll_file_open,
3015 .release = ll_file_release,
3016 .mmap = ll_file_mmap,
3017 .llseek = ll_file_seek,
3018 .sendfile = ll_file_sendfile,
3020 #ifdef HAVE_F_OP_FLOCK
3021 .flock = ll_file_noflock,
3023 .lock = ll_file_noflock
3026 struct inode_operations ll_file_inode_operations = {
3027 #ifdef HAVE_VFS_INTENT_PATCHES
3028 .setattr_raw = ll_setattr_raw,
3030 .setattr = ll_setattr,
3031 .truncate = ll_truncate,
3032 .getattr = ll_getattr,
3033 .permission = ll_inode_permission,
3034 .setxattr = ll_setxattr,
3035 .getxattr = ll_getxattr,
3036 .listxattr = ll_listxattr,
3037 .removexattr = ll_removexattr,
3040 /* dynamic ioctl number support routins */
3041 static struct llioc_ctl_data {
3042 struct rw_semaphore ioc_sem;
3043 struct list_head ioc_head;
3045 __RWSEM_INITIALIZER(llioc.ioc_sem),
3046 CFS_LIST_HEAD_INIT(llioc.ioc_head)
3051 struct list_head iocd_list;
3052 unsigned int iocd_size;
3053 llioc_callback_t iocd_cb;
3054 unsigned int iocd_count;
3055 unsigned int iocd_cmd[0];
3058 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd)
3061 struct llioc_data *in_data = NULL;
3064 if (cb == NULL || cmd == NULL ||
3065 count > LLIOC_MAX_CMD || count < 0)
3068 size = sizeof(*in_data) + count * sizeof(unsigned int);
3069 OBD_ALLOC(in_data, size);
3070 if (in_data == NULL)
3073 memset(in_data, 0, sizeof(*in_data));
3074 in_data->iocd_size = size;
3075 in_data->iocd_cb = cb;
3076 in_data->iocd_count = count;
3077 memcpy(in_data->iocd_cmd, cmd, sizeof(unsigned int) * count);
3079 down_write(&llioc.ioc_sem);
3080 list_add_tail(&in_data->iocd_list, &llioc.ioc_head);
3081 up_write(&llioc.ioc_sem);
3086 void ll_iocontrol_unregister(void *magic)
3088 struct llioc_data *tmp;
3093 down_write(&llioc.ioc_sem);
3094 list_for_each_entry(tmp, &llioc.ioc_head, iocd_list) {
3096 unsigned int size = tmp->iocd_size;
3098 list_del(&tmp->iocd_list);
3099 up_write(&llioc.ioc_sem);
3101 OBD_FREE(tmp, size);
3105 up_write(&llioc.ioc_sem);
3107 CWARN("didn't find iocontrol register block with magic: %p\n", magic);
3110 EXPORT_SYMBOL(ll_iocontrol_register);
3111 EXPORT_SYMBOL(ll_iocontrol_unregister);
3113 enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file,
3114 unsigned int cmd, unsigned long arg, int *rcp)
3116 enum llioc_iter ret = LLIOC_CONT;
3117 struct llioc_data *data;
3118 int rc = -EINVAL, i;
3120 down_read(&llioc.ioc_sem);
3121 list_for_each_entry(data, &llioc.ioc_head, iocd_list) {
3122 for (i = 0; i < data->iocd_count; i++) {
3123 if (cmd != data->iocd_cmd[i])
3126 ret = data->iocd_cb(inode, file, cmd, arg, data, &rc);
3130 if (ret == LLIOC_STOP)
3133 up_read(&llioc.ioc_sem);