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 /* don't do anything for / */
290 if (inode->i_sb->s_root == file->f_dentry)
293 ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
294 fd = LUSTRE_FPRIVATE(file);
297 /* don't do anything for / */
298 if (inode->i_sb->s_root == file->f_dentry) {
299 LUSTRE_FPRIVATE(file) = NULL;
300 ll_file_data_put(fd);
305 lov_test_and_clear_async_rc(lsm);
306 lli->lli_async_rc = 0;
308 rc = ll_md_close(sbi->ll_md_exp, inode, file);
312 static int ll_intent_file_open(struct file *file, void *lmm,
313 int lmmsize, struct lookup_intent *itp)
315 struct ll_sb_info *sbi = ll_i2sbi(file->f_dentry->d_inode);
316 struct dentry *parent = file->f_dentry->d_parent;
317 const char *name = file->f_dentry->d_name.name;
318 const int len = file->f_dentry->d_name.len;
319 struct md_op_data *op_data;
320 struct ptlrpc_request *req;
326 /* Usually we come here only for NFSD, and we want open lock.
327 But we can also get here with pre 2.6.15 patchless kernels, and in
328 that case that lock is also ok */
329 /* We can also get here if there was cached open handle in revalidate_it
330 * but it disappeared while we were getting from there to ll_file_open.
331 * But this means this file was closed and immediatelly opened which
332 * makes a good candidate for using OPEN lock */
333 /* If lmmsize & lmm are not 0, we are just setting stripe info
334 * parameters. No need for the open lock */
335 if (!lmm && !lmmsize)
336 itp->it_flags |= MDS_OPEN_LOCK;
338 op_data = ll_prep_md_op_data(NULL, parent->d_inode,
339 file->f_dentry->d_inode, name, len,
340 O_RDWR, LUSTRE_OPC_ANY, NULL);
342 RETURN(PTR_ERR(op_data));
344 rc = md_intent_lock(sbi->ll_md_exp, op_data, lmm, lmmsize, itp,
345 0 /*unused */, &req, ll_md_blocking_ast, 0);
346 ll_finish_md_op_data(op_data);
348 /* reason for keep own exit path - don`t flood log
349 * with messages with -ESTALE errors.
351 if (!it_disposition(itp, DISP_OPEN_OPEN) ||
352 it_open_error(DISP_OPEN_OPEN, itp))
354 ll_release_openhandle(file->f_dentry, itp);
358 if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) {
359 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp);
360 CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc);
364 if (itp->d.lustre.it_lock_mode)
365 md_set_lock_data(sbi->ll_md_exp,
366 &itp->d.lustre.it_lock_handle,
367 file->f_dentry->d_inode);
369 rc = ll_prep_inode(&file->f_dentry->d_inode, req, DLM_REPLY_REC_OFF,
372 ptlrpc_req_finished(itp->d.lustre.it_data);
375 it_clear_disposition(itp, DISP_ENQ_COMPLETE);
376 ll_intent_drop_lock(itp);
381 static int ll_och_fill(struct obd_export *md_exp, struct ll_inode_info *lli,
382 struct lookup_intent *it, struct obd_client_handle *och)
384 struct ptlrpc_request *req = it->d.lustre.it_data;
385 struct mdt_body *body;
389 body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF, sizeof(*body));
390 /* reply already checked out */
391 LASSERT(body != NULL);
392 /* and swabbed in md_enqueue */
393 LASSERT(lustre_rep_swabbed(req, DLM_REPLY_REC_OFF));
395 memcpy(&och->och_fh, &body->handle, sizeof(body->handle));
396 och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
397 och->och_fid = lli->lli_fid;
398 och->och_flags = it->it_flags;
399 lli->lli_ioepoch = body->ioepoch;
401 return md_set_open_replay_data(md_exp, och, req);
404 int ll_local_open(struct file *file, struct lookup_intent *it,
405 struct ll_file_data *fd, struct obd_client_handle *och)
407 struct inode *inode = file->f_dentry->d_inode;
408 struct ll_inode_info *lli = ll_i2info(inode);
411 LASSERT(!LUSTRE_FPRIVATE(file));
416 struct ptlrpc_request *req = it->d.lustre.it_data;
417 struct mdt_body *body;
420 rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, lli, it, och);
424 body = lustre_msg_buf(req->rq_repmsg,
425 DLM_REPLY_REC_OFF, sizeof(*body));
427 if ((it->it_flags & FMODE_WRITE) &&
428 (body->valid & OBD_MD_FLSIZE))
430 CDEBUG(D_INODE, "Epoch "LPU64" opened on "DFID"\n",
431 lli->lli_ioepoch, PFID(&lli->lli_fid));
435 LUSTRE_FPRIVATE(file) = fd;
436 ll_readahead_init(inode, &fd->fd_ras);
437 fd->fd_omode = it->it_flags;
441 /* Open a file, and (for the very first open) create objects on the OSTs at
442 * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object
443 * creation or open until ll_lov_setstripe() ioctl is called. We grab
444 * lli_open_sem to ensure no other process will create objects, send the
445 * stripe MD to the MDS, or try to destroy the objects if that fails.
447 * If we already have the stripe MD locally then we don't request it in
448 * md_open(), by passing a lmm_size = 0.
450 * It is up to the application to ensure no other processes open this file
451 * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
452 * used. We might be able to avoid races of that sort by getting lli_open_sem
453 * before returning in the O_LOV_DELAY_CREATE case and dropping it here
454 * or in ll_file_release(), but I'm not sure that is desirable/necessary.
456 int ll_file_open(struct inode *inode, struct file *file)
458 struct ll_inode_info *lli = ll_i2info(inode);
459 struct lookup_intent *it, oit = { .it_op = IT_OPEN,
460 .it_flags = file->f_flags };
461 struct lov_stripe_md *lsm;
462 struct ptlrpc_request *req = NULL;
463 struct obd_client_handle **och_p;
465 struct ll_file_data *fd;
469 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), flags %o\n", inode->i_ino,
470 inode->i_generation, inode, file->f_flags);
472 /* don't do anything for / */
473 if (inode->i_sb->s_root == file->f_dentry)
476 #ifdef HAVE_VFS_INTENT_PATCHES
479 it = file->private_data; /* XXX: compat macro */
480 file->private_data = NULL; /* prevent ll_local_open assertion */
483 fd = ll_file_data_get();
487 /* don't do anything for / */
488 if (inode->i_sb->s_root == file->f_dentry) {
489 LUSTRE_FPRIVATE(file) = fd;
493 if (!it || !it->d.lustre.it_disposition) {
494 /* Convert f_flags into access mode. We cannot use file->f_mode,
495 * because everything but O_ACCMODE mask was stripped from
497 if ((oit.it_flags + 1) & O_ACCMODE)
499 if (file->f_flags & O_TRUNC)
500 oit.it_flags |= FMODE_WRITE;
502 /* kernel only call f_op->open in dentry_open. filp_open calls
503 * dentry_open after call to open_namei that checks permissions.
504 * Only nfsd_open call dentry_open directly without checking
505 * permissions and because of that this code below is safe. */
506 if (oit.it_flags & FMODE_WRITE)
507 oit.it_flags |= MDS_OPEN_OWNEROVERRIDE;
509 /* We do not want O_EXCL here, presumably we opened the file
510 * already? XXX - NFS implications? */
511 oit.it_flags &= ~O_EXCL;
516 /* Let's see if we have file open on MDS already. */
517 if (it->it_flags & FMODE_WRITE) {
518 och_p = &lli->lli_mds_write_och;
519 och_usecount = &lli->lli_open_fd_write_count;
520 } else if (it->it_flags & FMODE_EXEC) {
521 och_p = &lli->lli_mds_exec_och;
522 och_usecount = &lli->lli_open_fd_exec_count;
524 och_p = &lli->lli_mds_read_och;
525 och_usecount = &lli->lli_open_fd_read_count;
528 down(&lli->lli_och_sem);
529 if (*och_p) { /* Open handle is present */
530 if (it_disposition(it, DISP_OPEN_OPEN)) {
531 /* Well, there's extra open request that we do not need,
532 let's close it somehow. This will decref request. */
533 rc = it_open_error(DISP_OPEN_OPEN, it);
535 ll_file_data_put(fd);
536 GOTO(out_och_free, rc);
538 ll_release_openhandle(file->f_dentry, it);
539 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats,
544 rc = ll_local_open(file, it, fd, NULL);
546 up(&lli->lli_och_sem);
547 ll_file_data_put(fd);
551 LASSERT(*och_usecount == 0);
552 OBD_ALLOC(*och_p, sizeof (struct obd_client_handle));
554 ll_file_data_put(fd);
555 GOTO(out_och_free, rc = -ENOMEM);
558 if (!it->d.lustre.it_disposition) {
559 it->it_flags |= O_CHECK_STALE;
560 rc = ll_intent_file_open(file, NULL, 0, it);
561 it->it_flags &= ~O_CHECK_STALE;
563 ll_file_data_put(fd);
564 GOTO(out_och_free, rc);
567 /* Got some error? Release the request */
568 if (it->d.lustre.it_status < 0) {
569 req = it->d.lustre.it_data;
570 ptlrpc_req_finished(req);
572 md_set_lock_data(ll_i2sbi(inode)->ll_md_exp,
573 &it->d.lustre.it_lock_handle,
574 file->f_dentry->d_inode);
576 req = it->d.lustre.it_data;
578 /* md_intent_lock() didn't get a request ref if there was an
579 * open error, so don't do cleanup on the request here
581 /* XXX (green): Should not we bail out on any error here, not
582 * just open error? */
583 rc = it_open_error(DISP_OPEN_OPEN, it);
585 ll_file_data_put(fd);
586 GOTO(out_och_free, rc);
589 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN, 1);
590 rc = ll_local_open(file, it, fd, *och_p);
592 up(&lli->lli_och_sem);
593 ll_file_data_put(fd);
594 GOTO(out_och_free, rc);
597 up(&lli->lli_och_sem);
599 /* Must do this outside lli_och_sem lock to prevent deadlock where
600 different kind of OPEN lock for this same inode gets cancelled
601 by ldlm_cancel_lru */
602 if (!S_ISREG(inode->i_mode))
609 if (file->f_flags & O_LOV_DELAY_CREATE ||
610 !(file->f_mode & FMODE_WRITE)) {
611 CDEBUG(D_INODE, "object creation was delayed\n");
615 file->f_flags &= ~O_LOV_DELAY_CREATE;
618 ptlrpc_req_finished(req);
620 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
624 OBD_FREE(*och_p, sizeof (struct obd_client_handle));
625 *och_p = NULL; /* OBD_FREE writes some magic there */
628 up(&lli->lli_och_sem);
634 /* Fills the obdo with the attributes for the inode defined by lsm */
635 int ll_inode_getattr(struct inode *inode, struct obdo *obdo)
637 struct ptlrpc_request_set *set;
638 struct ll_inode_info *lli = ll_i2info(inode);
639 struct lov_stripe_md *lsm = lli->lli_smd;
641 struct obd_info oinfo = { { { 0 } } };
645 LASSERT(lsm != NULL);
649 oinfo.oi_oa->o_id = lsm->lsm_object_id;
650 oinfo.oi_oa->o_gr = lsm->lsm_object_gr;
651 oinfo.oi_oa->o_mode = S_IFREG;
652 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE |
653 OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
654 OBD_MD_FLBLKSZ | OBD_MD_FLATIME |
655 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
657 oinfo.oi_capa = ll_mdscapa_get(inode);
659 set = ptlrpc_prep_set();
661 CERROR("can't allocate ptlrpc set\n");
664 rc = obd_getattr_async(ll_i2dtexp(inode), &oinfo, set);
666 rc = ptlrpc_set_wait(set);
667 ptlrpc_set_destroy(set);
669 capa_put(oinfo.oi_capa);
673 oinfo.oi_oa->o_valid &= (OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ |
674 OBD_MD_FLATIME | OBD_MD_FLMTIME |
675 OBD_MD_FLCTIME | OBD_MD_FLSIZE);
677 obdo_refresh_inode(inode, oinfo.oi_oa, oinfo.oi_oa->o_valid);
678 CDEBUG(D_INODE, "objid "LPX64" size %Lu, blocks %lu, blksize %lu\n",
679 lli->lli_smd->lsm_object_id, i_size_read(inode),
680 inode->i_blocks, inode->i_blksize);
684 static inline void ll_remove_suid(struct inode *inode)
688 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
689 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
691 /* was any of the uid bits set? */
692 mode &= inode->i_mode;
693 if (mode && !capable(CAP_FSETID)) {
694 inode->i_mode &= ~mode;
695 // XXX careful here - we cannot change the size
699 static int ll_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
701 struct ll_inode_info *lli = ll_i2info(inode);
702 struct lov_stripe_md *lsm = lli->lli_smd;
703 struct obd_export *exp = ll_i2dtexp(inode);
706 struct ldlm_lock *lock;
707 struct lov_stripe_md *lsm;
708 } key = { .name = "lock_to_stripe", .lock = lock, .lsm = lsm };
709 __u32 stripe, vallen = sizeof(stripe);
713 if (lsm->lsm_stripe_count == 1)
714 GOTO(check, stripe = 0);
716 /* get our offset in the lov */
717 rc = obd_get_info(exp, sizeof(key), &key, &vallen, &stripe);
719 CERROR("obd_get_info: rc = %d\n", rc);
722 LASSERT(stripe < lsm->lsm_stripe_count);
725 if (lsm->lsm_oinfo[stripe]->loi_id != lock->l_resource->lr_name.name[0]||
726 lsm->lsm_oinfo[stripe]->loi_gr != lock->l_resource->lr_name.name[2]){
727 LDLM_ERROR(lock, "resource doesn't match object "LPU64"/"LPU64,
728 lsm->lsm_oinfo[stripe]->loi_id,
729 lsm->lsm_oinfo[stripe]->loi_gr);
730 RETURN(-ELDLM_NO_LOCK_DATA);
736 /* Flush the page cache for an extent as its canceled. When we're on an LOV,
737 * we get a lock cancellation for each stripe, so we have to map the obd's
738 * region back onto the stripes in the file that it held.
740 * No one can dirty the extent until we've finished our work and they can
741 * enqueue another lock. The DLM protects us from ll_file_read/write here,
742 * but other kernel actors could have pages locked.
744 * Called with the DLM lock held. */
745 void ll_pgcache_remove_extent(struct inode *inode, struct lov_stripe_md *lsm,
746 struct ldlm_lock *lock, __u32 stripe)
748 ldlm_policy_data_t tmpex;
749 unsigned long start, end, count, skip, i, j;
751 int rc, rc2, discard = lock->l_flags & LDLM_FL_DISCARD_DATA;
752 struct lustre_handle lockh;
753 struct address_space *mapping = inode->i_mapping;
756 tmpex = lock->l_policy_data;
757 CDEBUG(D_INODE|D_PAGE, "inode %lu(%p) ["LPU64"->"LPU64"] size: %llu\n",
758 inode->i_ino, inode, tmpex.l_extent.start, tmpex.l_extent.end,
761 /* our locks are page granular thanks to osc_enqueue, we invalidate the
763 if ((tmpex.l_extent.start & ~CFS_PAGE_MASK) != 0 ||
764 ((tmpex.l_extent.end + 1) & ~CFS_PAGE_MASK) != 0)
765 LDLM_ERROR(lock, "lock not aligned on PAGE_SIZE %lu",
767 LASSERT((tmpex.l_extent.start & ~CFS_PAGE_MASK) == 0);
768 LASSERT(((tmpex.l_extent.end + 1) & ~CFS_PAGE_MASK) == 0);
772 start = tmpex.l_extent.start >> CFS_PAGE_SHIFT;
773 end = tmpex.l_extent.end >> CFS_PAGE_SHIFT;
774 if (lsm->lsm_stripe_count > 1) {
775 count = lsm->lsm_stripe_size >> CFS_PAGE_SHIFT;
776 skip = (lsm->lsm_stripe_count - 1) * count;
777 start += start/count * skip + stripe * count;
779 end += end/count * skip + stripe * count;
781 if (end < tmpex.l_extent.end >> CFS_PAGE_SHIFT)
784 i = i_size_read(inode) ? (__u64)(i_size_read(inode) - 1) >>
789 CDEBUG(D_INODE|D_PAGE, "walking page indices start: %lu j: %lu "
790 "count: %lu skip: %lu end: %lu%s\n", start, start % count,
791 count, skip, end, discard ? " (DISCARDING)" : "");
793 /* walk through the vmas on the inode and tear down mmaped pages that
794 * intersect with the lock. this stops immediately if there are no
795 * mmap()ed regions of the file. This is not efficient at all and
796 * should be short lived. We'll associate mmap()ed pages with the lock
797 * and will be able to find them directly */
798 for (i = start; i <= end; i += (j + skip)) {
799 j = min(count - (i % count), end - i + 1);
802 if (ll_teardown_mmaps(mapping,
803 (__u64)i << CFS_PAGE_SHIFT,
804 ((__u64)(i+j) << CFS_PAGE_SHIFT) - 1) )
808 /* this is the simplistic implementation of page eviction at
809 * cancelation. It is careful to get races with other page
810 * lockers handled correctly. fixes from bug 20 will make it
811 * more efficient by associating locks with pages and with
812 * batching writeback under the lock explicitly. */
813 for (i = start, j = start % count; i <= end;
814 j++, i++, tmpex.l_extent.start += CFS_PAGE_SIZE) {
816 CDEBUG(D_PAGE, "skip index %lu to %lu\n", i, i + skip);
822 LASSERTF(tmpex.l_extent.start< lock->l_policy_data.l_extent.end,
823 LPU64" >= "LPU64" start %lu i %lu end %lu\n",
824 tmpex.l_extent.start, lock->l_policy_data.l_extent.end,
827 if (!mapping_has_pages(mapping)) {
828 CDEBUG(D_INODE|D_PAGE, "nothing left\n");
834 page = find_get_page(mapping, i);
837 LL_CDEBUG_PAGE(D_PAGE, page, "lock page idx %lu ext "LPU64"\n",
838 i, tmpex.l_extent.start);
841 /* page->mapping to check with racing against teardown */
842 if (!discard && clear_page_dirty_for_io(page)) {
843 rc = ll_call_writepage(inode, page);
844 /* either waiting for io to complete or reacquiring
845 * the lock that the failed writepage released */
847 wait_on_page_writeback(page);
849 CERROR("writepage inode %lu(%p) of page %p "
850 "failed: %d\n", inode->i_ino, inode,
853 set_bit(AS_ENOSPC, &mapping->flags);
855 set_bit(AS_EIO, &mapping->flags);
859 tmpex.l_extent.end = tmpex.l_extent.start + CFS_PAGE_SIZE - 1;
860 /* check to see if another DLM lock covers this page b=2765 */
861 rc2 = ldlm_lock_match(lock->l_resource->lr_namespace,
862 LDLM_FL_BLOCK_GRANTED|LDLM_FL_CBPENDING |
864 &lock->l_resource->lr_name, LDLM_EXTENT,
865 &tmpex, LCK_PR | LCK_PW, &lockh);
867 if (rc2 <= 0 && page->mapping != NULL) {
868 struct ll_async_page *llap = llap_cast_private(page);
869 /* checking again to account for writeback's
871 LL_CDEBUG_PAGE(D_PAGE, page, "truncating\n");
873 ll_ra_accounting(llap, mapping);
874 ll_truncate_complete_page(page);
877 page_cache_release(page);
879 LASSERTF(tmpex.l_extent.start <=
880 (lock->l_policy_data.l_extent.end == ~0ULL ? ~0ULL :
881 lock->l_policy_data.l_extent.end + 1),
882 "loop too long "LPU64" > "LPU64" start %lu i %lu end %lu\n",
883 tmpex.l_extent.start, lock->l_policy_data.l_extent.end,
888 static int ll_extent_lock_callback(struct ldlm_lock *lock,
889 struct ldlm_lock_desc *new, void *data,
892 struct lustre_handle lockh = { 0 };
896 if ((unsigned long)data > 0 && (unsigned long)data < 0x1000) {
897 LDLM_ERROR(lock, "cancelling lock with bad data %p", data);
902 case LDLM_CB_BLOCKING:
903 ldlm_lock2handle(lock, &lockh);
904 rc = ldlm_cli_cancel(&lockh);
906 CERROR("ldlm_cli_cancel failed: %d\n", rc);
908 case LDLM_CB_CANCELING: {
910 struct ll_inode_info *lli;
911 struct lov_stripe_md *lsm;
915 /* This lock wasn't granted, don't try to evict pages */
916 if (lock->l_req_mode != lock->l_granted_mode)
919 inode = ll_inode_from_lock(lock);
922 lli = ll_i2info(inode);
925 if (lli->lli_smd == NULL)
929 stripe = ll_lock_to_stripe_offset(inode, lock);
933 ll_pgcache_remove_extent(inode, lsm, lock, stripe);
935 lov_stripe_lock(lsm);
936 lock_res_and_lock(lock);
937 kms = ldlm_extent_shift_kms(lock,
938 lsm->lsm_oinfo[stripe]->loi_kms);
940 if (lsm->lsm_oinfo[stripe]->loi_kms != kms)
941 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
942 lsm->lsm_oinfo[stripe]->loi_kms, kms);
943 lsm->lsm_oinfo[stripe]->loi_kms = kms;
944 unlock_res_and_lock(lock);
945 lov_stripe_unlock(lsm);
958 int ll_async_completion_ast(struct ldlm_lock *lock, int flags, void *data)
960 /* XXX ALLOCATE - 160 bytes */
961 struct inode *inode = ll_inode_from_lock(lock);
962 struct ll_inode_info *lli = ll_i2info(inode);
963 struct lustre_handle lockh = { 0 };
968 if (flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
969 LDLM_FL_BLOCK_CONV)) {
970 LBUG(); /* not expecting any blocked async locks yet */
971 LDLM_DEBUG(lock, "client-side async enqueue returned a blocked "
973 ldlm_lock_dump(D_OTHER, lock, 0);
974 ldlm_reprocess_all(lock->l_resource);
978 LDLM_DEBUG(lock, "client-side async enqueue: granted/glimpsed");
980 stripe = ll_lock_to_stripe_offset(inode, lock);
984 if (lock->l_lvb_len) {
985 struct lov_stripe_md *lsm = lli->lli_smd;
987 lvb = lock->l_lvb_data;
988 lsm->lsm_oinfo[stripe].loi_rss = lvb->lvb_size;
990 lock_res_and_lock(lock);
991 ll_inode_size_lock(inode, 1);
992 kms = MAX(lsm->lsm_oinfo[stripe].loi_kms, lvb->lvb_size);
993 kms = ldlm_extent_shift_kms(NULL, kms);
994 if (lsm->lsm_oinfo[stripe].loi_kms != kms)
995 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
996 lsm->lsm_oinfo[stripe].loi_kms, kms);
997 lsm->lsm_oinfo[stripe].loi_kms = kms;
998 ll_inode_size_unlock(inode, 1);
999 unlock_res_and_lock(lock);
1004 wake_up(&lock->l_waitq);
1006 ldlm_lock2handle(lock, &lockh);
1007 ldlm_lock_decref(&lockh, LCK_PR);
1012 static int ll_glimpse_callback(struct ldlm_lock *lock, void *reqp)
1014 struct ptlrpc_request *req = reqp;
1015 struct inode *inode = ll_inode_from_lock(lock);
1016 struct ll_inode_info *lli;
1017 struct lov_stripe_md *lsm;
1018 struct ost_lvb *lvb;
1020 int size[2] = { sizeof(struct ptlrpc_body), sizeof(*lvb) };
1024 GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
1025 lli = ll_i2info(inode);
1027 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
1030 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
1032 /* First, find out which stripe index this lock corresponds to. */
1033 stripe = ll_lock_to_stripe_offset(inode, lock);
1035 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
1037 rc = lustre_pack_reply(req, 2, size, NULL);
1039 CERROR("lustre_pack_reply: %d\n", rc);
1043 lvb = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*lvb));
1044 lvb->lvb_size = lli->lli_smd->lsm_oinfo[stripe]->loi_kms;
1045 lvb->lvb_mtime = LTIME_S(inode->i_mtime);
1046 lvb->lvb_atime = LTIME_S(inode->i_atime);
1047 lvb->lvb_ctime = LTIME_S(inode->i_ctime);
1049 LDLM_DEBUG(lock, "i_size: %llu -> stripe number %u -> kms "LPU64
1050 " atime "LPU64", mtime "LPU64", ctime "LPU64,
1051 i_size_read(inode), stripe, lvb->lvb_size, lvb->lvb_mtime,
1052 lvb->lvb_atime, lvb->lvb_ctime);
1057 /* These errors are normal races, so we don't want to fill the console
1058 * with messages by calling ptlrpc_error() */
1059 if (rc == -ELDLM_NO_LOCK_DATA)
1060 lustre_pack_reply(req, 1, NULL, NULL);
1062 req->rq_status = rc;
1066 static void ll_merge_lvb(struct inode *inode)
1068 struct ll_inode_info *lli = ll_i2info(inode);
1069 struct ll_sb_info *sbi = ll_i2sbi(inode);
1073 ll_inode_size_lock(inode, 1);
1074 inode_init_lvb(inode, &lvb);
1075 obd_merge_lvb(sbi->ll_dt_exp, lli->lli_smd, &lvb, 0);
1076 i_size_write(inode, lvb.lvb_size);
1077 inode->i_blocks = lvb.lvb_blocks;
1078 LTIME_S(inode->i_mtime) = lvb.lvb_mtime;
1079 LTIME_S(inode->i_atime) = lvb.lvb_atime;
1080 LTIME_S(inode->i_ctime) = lvb.lvb_ctime;
1081 ll_inode_size_unlock(inode, 1);
1085 int ll_local_size(struct inode *inode)
1087 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
1088 struct ll_inode_info *lli = ll_i2info(inode);
1089 struct ll_sb_info *sbi = ll_i2sbi(inode);
1090 struct lustre_handle lockh = { 0 };
1095 if (lli->lli_smd->lsm_stripe_count == 0)
1098 rc = obd_match(sbi->ll_dt_exp, lli->lli_smd, LDLM_EXTENT,
1099 &policy, LCK_PR | LCK_PW, &flags, inode, &lockh);
1105 ll_merge_lvb(inode);
1106 obd_cancel(sbi->ll_dt_exp, lli->lli_smd, LCK_PR | LCK_PW, &lockh);
1110 int ll_glimpse_ioctl(struct ll_sb_info *sbi, struct lov_stripe_md *lsm,
1113 struct lustre_handle lockh = { 0 };
1114 struct ldlm_enqueue_info einfo = { 0 };
1115 struct obd_info oinfo = { { { 0 } } };
1121 einfo.ei_type = LDLM_EXTENT;
1122 einfo.ei_mode = LCK_PR;
1123 einfo.ei_cb_bl = ll_extent_lock_callback;
1124 einfo.ei_cb_cp = ldlm_completion_ast;
1125 einfo.ei_cb_gl = ll_glimpse_callback;
1126 einfo.ei_cbdata = NULL;
1128 oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
1129 oinfo.oi_lockh = &lockh;
1131 oinfo.oi_flags = LDLM_FL_HAS_INTENT;
1133 rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
1137 CERROR("obd_enqueue returned rc %d, "
1138 "returning -EIO\n", rc);
1139 RETURN(rc > 0 ? -EIO : rc);
1142 lov_stripe_lock(lsm);
1143 memset(&lvb, 0, sizeof(lvb));
1144 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 0);
1145 st->st_size = lvb.lvb_size;
1146 st->st_blocks = lvb.lvb_blocks;
1147 st->st_mtime = lvb.lvb_mtime;
1148 st->st_atime = lvb.lvb_atime;
1149 st->st_ctime = lvb.lvb_ctime;
1150 lov_stripe_unlock(lsm);
1155 /* NB: obd_merge_lvb will prefer locally cached writes if they extend the
1156 * file (because it prefers KMS over RSS when larger) */
1157 int ll_glimpse_size(struct inode *inode, int ast_flags)
1159 struct ll_inode_info *lli = ll_i2info(inode);
1160 struct ll_sb_info *sbi = ll_i2sbi(inode);
1161 struct lustre_handle lockh = { 0 };
1162 struct ldlm_enqueue_info einfo = { 0 };
1163 struct obd_info oinfo = { { { 0 } } };
1167 if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
1170 CDEBUG(D_DLMTRACE, "Glimpsing inode %lu\n", inode->i_ino);
1172 if (!lli->lli_smd) {
1173 CDEBUG(D_DLMTRACE, "No objects for inode %lu\n", inode->i_ino);
1177 /* NOTE: this looks like DLM lock request, but it may not be one. Due
1178 * to LDLM_FL_HAS_INTENT flag, this is glimpse request, that
1179 * won't revoke any conflicting DLM locks held. Instead,
1180 * ll_glimpse_callback() will be called on each client
1181 * holding a DLM lock against this file, and resulting size
1182 * will be returned for each stripe. DLM lock on [0, EOF] is
1183 * acquired only if there were no conflicting locks. */
1184 einfo.ei_type = LDLM_EXTENT;
1185 einfo.ei_mode = LCK_PR;
1186 einfo.ei_cb_bl = ll_extent_lock_callback;
1187 einfo.ei_cb_cp = ldlm_completion_ast;
1188 einfo.ei_cb_gl = ll_glimpse_callback;
1189 einfo.ei_cbdata = inode;
1191 oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
1192 oinfo.oi_lockh = &lockh;
1193 oinfo.oi_md = lli->lli_smd;
1194 oinfo.oi_flags = ast_flags | LDLM_FL_HAS_INTENT;
1196 rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
1200 CERROR("obd_enqueue returned rc %d, returning -EIO\n", rc);
1201 RETURN(rc > 0 ? -EIO : rc);
1204 ll_merge_lvb(inode);
1206 CDEBUG(D_DLMTRACE, "glimpse: size: %llu, blocks: %lu\n",
1207 i_size_read(inode), inode->i_blocks);
1212 int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
1213 struct lov_stripe_md *lsm, int mode,
1214 ldlm_policy_data_t *policy, struct lustre_handle *lockh,
1217 struct ll_sb_info *sbi = ll_i2sbi(inode);
1219 struct ldlm_enqueue_info einfo = { 0 };
1220 struct obd_info oinfo = { { { 0 } } };
1224 LASSERT(!lustre_handle_is_used(lockh));
1225 LASSERT(lsm != NULL);
1227 /* don't drop the mmapped file to LRU */
1228 if (mapping_mapped(inode->i_mapping))
1229 ast_flags |= LDLM_FL_NO_LRU;
1231 /* XXX phil: can we do this? won't it screw the file size up? */
1232 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
1233 (sbi->ll_flags & LL_SBI_NOLCK))
1236 CDEBUG(D_DLMTRACE, "Locking inode %lu, start "LPU64" end "LPU64"\n",
1237 inode->i_ino, policy->l_extent.start, policy->l_extent.end);
1239 einfo.ei_type = LDLM_EXTENT;
1240 einfo.ei_mode = mode;
1241 einfo.ei_cb_bl = ll_extent_lock_callback;
1242 einfo.ei_cb_cp = ldlm_completion_ast;
1243 einfo.ei_cb_gl = ll_glimpse_callback;
1244 einfo.ei_cbdata = inode;
1246 oinfo.oi_policy = *policy;
1247 oinfo.oi_lockh = lockh;
1249 oinfo.oi_flags = ast_flags;
1251 rc = obd_enqueue(sbi->ll_dt_exp, &oinfo, &einfo, NULL);
1252 *policy = oinfo.oi_policy;
1256 ll_inode_size_lock(inode, 1);
1257 inode_init_lvb(inode, &lvb);
1258 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
1260 if (policy->l_extent.start == 0 &&
1261 policy->l_extent.end == OBD_OBJECT_EOF) {
1262 /* vmtruncate()->ll_truncate() first sets the i_size and then
1263 * the kms under both a DLM lock and the
1264 * ll_inode_size_lock(). If we don't get the
1265 * ll_inode_size_lock() here we can match the DLM lock and
1266 * reset i_size from the kms before the truncating path has
1267 * updated the kms. generic_file_write can then trust the
1268 * stale i_size when doing appending writes and effectively
1269 * cancel the result of the truncate. Getting the
1270 * ll_inode_size_lock() after the enqueue maintains the DLM
1271 * -> ll_inode_size_lock() acquiring order. */
1272 i_size_write(inode, lvb.lvb_size);
1273 CDEBUG(D_INODE, "inode=%lu, updating i_size %llu\n",
1274 inode->i_ino, i_size_read(inode));
1278 LTIME_S(inode->i_mtime) = lvb.lvb_mtime;
1279 LTIME_S(inode->i_atime) = lvb.lvb_atime;
1280 LTIME_S(inode->i_ctime) = lvb.lvb_ctime;
1282 ll_inode_size_unlock(inode, 1);
1287 int ll_extent_unlock(struct ll_file_data *fd, struct inode *inode,
1288 struct lov_stripe_md *lsm, int mode,
1289 struct lustre_handle *lockh)
1291 struct ll_sb_info *sbi = ll_i2sbi(inode);
1295 /* XXX phil: can we do this? won't it screw the file size up? */
1296 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
1297 (sbi->ll_flags & LL_SBI_NOLCK))
1300 rc = obd_cancel(sbi->ll_dt_exp, lsm, mode, lockh);
1305 static ssize_t ll_file_read(struct file *file, char *buf, size_t count,
1308 struct inode *inode = file->f_dentry->d_inode;
1309 struct ll_inode_info *lli = ll_i2info(inode);
1310 struct lov_stripe_md *lsm = lli->lli_smd;
1311 struct ll_sb_info *sbi = ll_i2sbi(inode);
1312 struct ll_lock_tree tree;
1313 struct ll_lock_tree_node *node;
1315 struct ll_ra_read bead;
1318 ssize_t retval, chunk, sum = 0;
1322 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1323 inode->i_ino, inode->i_generation, inode, count, *ppos);
1324 /* "If nbyte is 0, read() will return 0 and have no other results."
1325 * -- Single Unix Spec */
1329 ll_stats_ops_tally(sbi, LPROC_LL_READ_BYTES, count);
1332 /* Read on file with no objects should return zero-filled
1333 * buffers up to file size (we can get non-zero sizes with
1334 * mknod + truncate, then opening file for read. This is a
1335 * common pattern in NFS case, it seems). Bug 6243 */
1337 /* Since there are no objects on OSTs, we have nothing to get
1338 * lock on and so we are forced to access inode->i_size
1341 /* Read beyond end of file */
1342 if (*ppos >= i_size_read(inode))
1345 if (count > i_size_read(inode) - *ppos)
1346 count = i_size_read(inode) - *ppos;
1347 /* Make sure to correctly adjust the file pos pointer for
1349 notzeroed = clear_user(buf, count);
1358 if (sbi->ll_max_rw_chunk != 0) {
1359 /* first, let's know the end of the current stripe */
1361 obd_extent_calc(sbi->ll_dt_exp, lsm, OBD_CALC_STRIPE_END,
1364 /* correct, the end is beyond the request */
1365 if (end > *ppos + count - 1)
1366 end = *ppos + count - 1;
1368 /* and chunk shouldn't be too large even if striping is wide */
1369 if (end - *ppos > sbi->ll_max_rw_chunk)
1370 end = *ppos + sbi->ll_max_rw_chunk - 1;
1372 end = *ppos + count - 1;
1375 node = ll_node_from_inode(inode, *ppos, end, LCK_PR);
1377 GOTO(out, retval = PTR_ERR(node));
1380 tree.lt_fd = LUSTRE_FPRIVATE(file);
1381 rc = ll_tree_lock(&tree, node, buf, count,
1382 file->f_flags & O_NONBLOCK ? LDLM_FL_BLOCK_NOWAIT :0);
1384 GOTO(out, retval = rc);
1386 ll_inode_size_lock(inode, 1);
1388 * Consistency guarantees: following possibilities exist for the
1389 * relation between region being read and real file size at this
1392 * (A): the region is completely inside of the file;
1394 * (B-x): x bytes of region are inside of the file, the rest is
1397 * (C): the region is completely outside of the file.
1399 * This classification is stable under DLM lock acquired by
1400 * ll_tree_lock() above, because to change class, other client has to
1401 * take DLM lock conflicting with our lock. Also, any updates to
1402 * ->i_size by other threads on this client are serialized by
1403 * ll_inode_size_lock(). This guarantees that short reads are handled
1404 * correctly in the face of concurrent writes and truncates.
1406 inode_init_lvb(inode, &lvb);
1407 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
1409 if (*ppos + count - 1 > kms) {
1410 /* A glimpse is necessary to determine whether we return a
1411 * short read (B) or some zeroes at the end of the buffer (C) */
1412 ll_inode_size_unlock(inode, 1);
1413 retval = ll_glimpse_size(inode, LDLM_FL_BLOCK_GRANTED);
1415 ll_tree_unlock(&tree);
1419 /* region is within kms and, hence, within real file size (A).
1420 * We need to increase i_size to cover the read region so that
1421 * generic_file_read() will do its job, but that doesn't mean
1422 * the kms size is _correct_, it is only the _minimum_ size.
1423 * If someone does a stat they will get the correct size which
1424 * will always be >= the kms value here. b=11081 */
1425 if (i_size_read(inode) < kms)
1426 i_size_write(inode, kms);
1427 ll_inode_size_unlock(inode, 1);
1430 chunk = end - *ppos + 1;
1431 CDEBUG(D_INODE, "Read ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
1432 inode->i_ino, chunk, *ppos, i_size_read(inode));
1434 /* turn off the kernel's read-ahead */
1435 file->f_ra.ra_pages = 0;
1437 /* initialize read-ahead window once per syscall */
1440 bead.lrr_start = *ppos >> CFS_PAGE_SHIFT;
1441 bead.lrr_count = (count + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
1442 ll_ra_read_in(file, &bead);
1446 file_accessed(file);
1447 retval = generic_file_read(file, buf, chunk, ppos);
1448 ll_rw_stats_tally(sbi, current->pid, file, count, 0);
1450 ll_tree_unlock(&tree);
1456 if (retval == chunk && count > 0)
1462 ll_ra_read_ex(file, &bead);
1463 retval = (sum > 0) ? sum : retval;
1468 * Write to a file (through the page cache).
1470 static ssize_t ll_file_write(struct file *file, const char *buf, size_t count,
1473 struct inode *inode = file->f_dentry->d_inode;
1474 struct ll_sb_info *sbi = ll_i2sbi(inode);
1475 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1476 struct ll_lock_tree tree;
1477 struct ll_lock_tree_node *node;
1478 loff_t maxbytes = ll_file_maxbytes(inode);
1479 loff_t lock_start, lock_end, end;
1480 ssize_t retval, chunk, sum = 0;
1484 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1485 inode->i_ino, inode->i_generation, inode, count, *ppos);
1487 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1489 /* POSIX, but surprised the VFS doesn't check this already */
1493 /* If file was opened for LL_IOC_LOV_SETSTRIPE but the ioctl wasn't
1494 * called on the file, don't fail the below assertion (bug 2388). */
1495 if (file->f_flags & O_LOV_DELAY_CREATE &&
1496 ll_i2info(inode)->lli_smd == NULL)
1499 LASSERT(ll_i2info(inode)->lli_smd != NULL);
1501 down(&ll_i2info(inode)->lli_write_sem);
1504 chunk = 0; /* just to fix gcc's warning */
1505 end = *ppos + count - 1;
1507 if (file->f_flags & O_APPEND) {
1509 lock_end = OBD_OBJECT_EOF;
1510 } else if (sbi->ll_max_rw_chunk != 0) {
1511 /* first, let's know the end of the current stripe */
1513 obd_extent_calc(sbi->ll_dt_exp, lsm, OBD_CALC_STRIPE_END,
1516 /* correct, the end is beyond the request */
1517 if (end > *ppos + count - 1)
1518 end = *ppos + count - 1;
1520 /* and chunk shouldn't be too large even if striping is wide */
1521 if (end - *ppos > sbi->ll_max_rw_chunk)
1522 end = *ppos + sbi->ll_max_rw_chunk - 1;
1527 lock_end = *ppos + count - 1;
1529 node = ll_node_from_inode(inode, lock_start, lock_end, LCK_PW);
1532 GOTO(out, retval = PTR_ERR(node));
1534 tree.lt_fd = LUSTRE_FPRIVATE(file);
1535 rc = ll_tree_lock(&tree, node, buf, count,
1536 file->f_flags & O_NONBLOCK ? LDLM_FL_BLOCK_NOWAIT :0);
1538 GOTO(out, retval = rc);
1540 /* This is ok, g_f_w will overwrite this under i_sem if it races
1541 * with a local truncate, it just makes our maxbyte checking easier.
1542 * The i_size value gets updated in ll_extent_lock() as a consequence
1543 * of the [0,EOF] extent lock we requested above. */
1544 if (file->f_flags & O_APPEND) {
1545 *ppos = i_size_read(inode);
1546 end = *ppos + count - 1;
1549 if (*ppos >= maxbytes) {
1550 send_sig(SIGXFSZ, current, 0);
1551 GOTO(out_unlock, retval = -EFBIG);
1553 if (*ppos + count > maxbytes)
1554 count = maxbytes - *ppos;
1556 /* generic_file_write handles O_APPEND after getting i_mutex */
1557 chunk = end - *ppos + 1;
1558 CDEBUG(D_INFO, "Writing inode %lu, "LPSZ" bytes, offset %Lu\n",
1559 inode->i_ino, chunk, *ppos);
1560 retval = generic_file_write(file, buf, chunk, ppos);
1561 ll_rw_stats_tally(ll_i2sbi(inode), current->pid, file, count, 1);
1564 ll_tree_unlock(&tree);
1571 if (retval == chunk && count > 0)
1575 up(&ll_i2info(inode)->lli_write_sem);
1577 retval = (sum > 0) ? sum : retval;
1578 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_WRITE_BYTES,
1579 retval > 0 ? retval : 0);
1584 * Send file content (through pagecache) somewhere with helper
1586 static ssize_t ll_file_sendfile(struct file *in_file, loff_t *ppos,size_t count,
1587 read_actor_t actor, void *target)
1589 struct inode *inode = in_file->f_dentry->d_inode;
1590 struct ll_inode_info *lli = ll_i2info(inode);
1591 struct lov_stripe_md *lsm = lli->lli_smd;
1592 struct ll_lock_tree tree;
1593 struct ll_lock_tree_node *node;
1595 struct ll_ra_read bead;
1600 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1601 inode->i_ino, inode->i_generation, inode, count, *ppos);
1603 /* "If nbyte is 0, read() will return 0 and have no other results."
1604 * -- Single Unix Spec */
1608 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_READ_BYTES, count);
1609 /* turn off the kernel's read-ahead */
1610 in_file->f_ra.ra_pages = 0;
1612 /* File with no objects, nothing to lock */
1614 RETURN(generic_file_sendfile(in_file, ppos, count, actor, target));
1616 node = ll_node_from_inode(inode, *ppos, *ppos + count - 1, LCK_PR);
1618 RETURN(PTR_ERR(node));
1620 tree.lt_fd = LUSTRE_FPRIVATE(in_file);
1621 rc = ll_tree_lock(&tree, node, NULL, count,
1622 in_file->f_flags & O_NONBLOCK?LDLM_FL_BLOCK_NOWAIT:0);
1626 ll_inode_size_lock(inode, 1);
1628 * Consistency guarantees: following possibilities exist for the
1629 * relation between region being read and real file size at this
1632 * (A): the region is completely inside of the file;
1634 * (B-x): x bytes of region are inside of the file, the rest is
1637 * (C): the region is completely outside of the file.
1639 * This classification is stable under DLM lock acquired by
1640 * ll_tree_lock() above, because to change class, other client has to
1641 * take DLM lock conflicting with our lock. Also, any updates to
1642 * ->i_size by other threads on this client are serialized by
1643 * ll_inode_size_lock(). This guarantees that short reads are handled
1644 * correctly in the face of concurrent writes and truncates.
1646 inode_init_lvb(inode, &lvb);
1647 obd_merge_lvb(ll_i2sbi(inode)->ll_dt_exp, lsm, &lvb, 1);
1649 if (*ppos + count - 1 > kms) {
1650 /* A glimpse is necessary to determine whether we return a
1651 * short read (B) or some zeroes at the end of the buffer (C) */
1652 ll_inode_size_unlock(inode, 1);
1653 retval = ll_glimpse_size(inode, LDLM_FL_BLOCK_GRANTED);
1657 /* region is within kms and, hence, within real file size (A) */
1658 i_size_write(inode, kms);
1659 ll_inode_size_unlock(inode, 1);
1662 CDEBUG(D_INFO, "Send ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
1663 inode->i_ino, count, *ppos, i_size_read(inode));
1665 bead.lrr_start = *ppos >> CFS_PAGE_SHIFT;
1666 bead.lrr_count = (count + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
1667 ll_ra_read_in(in_file, &bead);
1669 file_accessed(in_file);
1670 retval = generic_file_sendfile(in_file, ppos, count, actor, target);
1671 ll_ra_read_ex(in_file, &bead);
1674 ll_tree_unlock(&tree);
1678 static int ll_lov_recreate_obj(struct inode *inode, struct file *file,
1681 struct ll_inode_info *lli = ll_i2info(inode);
1682 struct obd_export *exp = ll_i2dtexp(inode);
1683 struct ll_recreate_obj ucreatp;
1684 struct obd_trans_info oti = { 0 };
1685 struct obdo *oa = NULL;
1688 struct lov_stripe_md *lsm, *lsm2;
1691 if (!capable (CAP_SYS_ADMIN))
1694 rc = copy_from_user(&ucreatp, (struct ll_recreate_obj *)arg,
1695 sizeof(struct ll_recreate_obj));
1703 down(&lli->lli_size_sem);
1706 GOTO(out, rc = -ENOENT);
1707 lsm_size = sizeof(*lsm) + (sizeof(struct lov_oinfo) *
1708 (lsm->lsm_stripe_count));
1710 OBD_ALLOC(lsm2, lsm_size);
1712 GOTO(out, rc = -ENOMEM);
1714 oa->o_id = ucreatp.lrc_id;
1715 oa->o_gr = ucreatp.lrc_group;
1716 oa->o_nlink = ucreatp.lrc_ost_idx;
1717 oa->o_flags |= OBD_FL_RECREATE_OBJS;
1718 oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
1719 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
1720 OBD_MD_FLMTIME | OBD_MD_FLCTIME);
1722 oti.oti_objid = NULL;
1723 memcpy(lsm2, lsm, lsm_size);
1724 rc = obd_create(exp, oa, &lsm2, &oti);
1726 OBD_FREE(lsm2, lsm_size);
1729 up(&lli->lli_size_sem);
1734 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
1735 int flags, struct lov_user_md *lum, int lum_size)
1737 struct ll_inode_info *lli = ll_i2info(inode);
1738 struct lov_stripe_md *lsm;
1739 struct lookup_intent oit = {.it_op = IT_OPEN, .it_flags = flags};
1743 down(&lli->lli_size_sem);
1746 up(&lli->lli_size_sem);
1747 CDEBUG(D_IOCTL, "stripe already exists for ino %lu\n",
1752 rc = ll_intent_file_open(file, lum, lum_size, &oit);
1755 if (it_disposition(&oit, DISP_LOOKUP_NEG))
1756 GOTO(out_req_free, rc = -ENOENT);
1757 rc = oit.d.lustre.it_status;
1759 GOTO(out_req_free, rc);
1761 ll_release_openhandle(file->f_dentry, &oit);
1764 up(&lli->lli_size_sem);
1765 ll_intent_release(&oit);
1768 ptlrpc_req_finished((struct ptlrpc_request *) oit.d.lustre.it_data);
1772 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
1773 struct lov_mds_md **lmmp, int *lmm_size,
1774 struct ptlrpc_request **request)
1776 struct ll_sb_info *sbi = ll_i2sbi(inode);
1777 struct mdt_body *body;
1778 struct lov_mds_md *lmm = NULL;
1779 struct ptlrpc_request *req = NULL;
1780 struct obd_capa *oc;
1783 rc = ll_get_max_mdsize(sbi, &lmmsize);
1787 oc = ll_mdscapa_get(inode);
1788 rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode),
1789 oc, filename, strlen(filename) + 1,
1790 OBD_MD_FLEASIZE | OBD_MD_FLDIREA, lmmsize, &req);
1793 CDEBUG(D_INFO, "md_getattr_name failed "
1794 "on %s: rc %d\n", filename, rc);
1798 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
1799 LASSERT(body != NULL); /* checked by mdc_getattr_name */
1800 /* swabbed by mdc_getattr_name */
1801 LASSERT(lustre_rep_swabbed(req, REPLY_REC_OFF));
1803 lmmsize = body->eadatasize;
1805 if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
1807 GOTO(out, rc = -ENODATA);
1810 lmm = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 1, lmmsize);
1811 LASSERT(lmm != NULL);
1812 LASSERT(lustre_rep_swabbed(req, REPLY_REC_OFF + 1));
1815 * This is coming from the MDS, so is probably in
1816 * little endian. We convert it to host endian before
1817 * passing it to userspace.
1819 if (lmm->lmm_magic == __swab32(LOV_MAGIC)) {
1820 lustre_swab_lov_user_md((struct lov_user_md *)lmm);
1821 lustre_swab_lov_user_md_objects((struct lov_user_md *)lmm);
1822 } else if (lmm->lmm_magic == __swab32(LOV_MAGIC_JOIN)) {
1823 lustre_swab_lov_user_md_join((struct lov_user_md_join *)lmm);
1826 if (lmm->lmm_magic == LOV_MAGIC_JOIN) {
1827 struct lov_stripe_md *lsm;
1828 struct lov_user_md_join *lmj;
1829 int lmj_size, i, aindex = 0;
1831 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
1833 GOTO(out, rc = -ENOMEM);
1834 rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp, lsm);
1836 GOTO(out_free_memmd, rc);
1838 lmj_size = sizeof(struct lov_user_md_join) +
1839 lsm->lsm_stripe_count *
1840 sizeof(struct lov_user_ost_data_join);
1841 OBD_ALLOC(lmj, lmj_size);
1843 GOTO(out_free_memmd, rc = -ENOMEM);
1845 memcpy(lmj, lmm, sizeof(struct lov_user_md_join));
1846 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1847 struct lov_extent *lex =
1848 &lsm->lsm_array->lai_ext_array[aindex];
1850 if (lex->le_loi_idx + lex->le_stripe_count <= i)
1852 CDEBUG(D_INFO, "aindex %d i %d l_extent_start "
1853 LPU64" len %d\n", aindex, i,
1854 lex->le_start, (int)lex->le_len);
1855 lmj->lmm_objects[i].l_extent_start =
1858 if ((int)lex->le_len == -1)
1859 lmj->lmm_objects[i].l_extent_end = -1;
1861 lmj->lmm_objects[i].l_extent_end =
1862 lex->le_start + lex->le_len;
1863 lmj->lmm_objects[i].l_object_id =
1864 lsm->lsm_oinfo[i]->loi_id;
1865 lmj->lmm_objects[i].l_object_gr =
1866 lsm->lsm_oinfo[i]->loi_gr;
1867 lmj->lmm_objects[i].l_ost_gen =
1868 lsm->lsm_oinfo[i]->loi_ost_gen;
1869 lmj->lmm_objects[i].l_ost_idx =
1870 lsm->lsm_oinfo[i]->loi_ost_idx;
1872 lmm = (struct lov_mds_md *)lmj;
1875 obd_free_memmd(sbi->ll_dt_exp, &lsm);
1879 *lmm_size = lmmsize;
1884 static int ll_lov_setea(struct inode *inode, struct file *file,
1887 int flags = MDS_OPEN_HAS_OBJS | FMODE_WRITE;
1888 struct lov_user_md *lump;
1889 int lum_size = sizeof(struct lov_user_md) +
1890 sizeof(struct lov_user_ost_data);
1894 if (!capable (CAP_SYS_ADMIN))
1897 OBD_ALLOC(lump, lum_size);
1901 rc = copy_from_user(lump, (struct lov_user_md *)arg, lum_size);
1903 OBD_FREE(lump, lum_size);
1907 rc = ll_lov_setstripe_ea_info(inode, file, flags, lump, lum_size);
1909 OBD_FREE(lump, lum_size);
1913 static int ll_lov_setstripe(struct inode *inode, struct file *file,
1916 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
1918 int flags = FMODE_WRITE;
1921 /* Bug 1152: copy properly when this is no longer true */
1922 LASSERT(sizeof(lum) == sizeof(*lump));
1923 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lump->lmm_objects[0]));
1924 rc = copy_from_user(&lum, lump, sizeof(lum));
1928 rc = ll_lov_setstripe_ea_info(inode, file, flags, &lum, sizeof(lum));
1930 put_user(0, &lump->lmm_stripe_count);
1931 rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode),
1932 0, ll_i2info(inode)->lli_smd, lump);
1937 static int ll_lov_getstripe(struct inode *inode, unsigned long arg)
1939 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1944 return obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode), 0, lsm,
1948 static int ll_get_grouplock(struct inode *inode, struct file *file,
1951 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1952 ldlm_policy_data_t policy = { .l_extent = { .start = 0,
1953 .end = OBD_OBJECT_EOF}};
1954 struct lustre_handle lockh = { 0 };
1955 struct ll_inode_info *lli = ll_i2info(inode);
1956 struct lov_stripe_md *lsm = lli->lli_smd;
1960 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
1964 policy.l_extent.gid = arg;
1965 if (file->f_flags & O_NONBLOCK)
1966 flags = LDLM_FL_BLOCK_NOWAIT;
1968 rc = ll_extent_lock(fd, inode, lsm, LCK_GROUP, &policy, &lockh, flags);
1972 fd->fd_flags |= LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK;
1974 memcpy(&fd->fd_cwlockh, &lockh, sizeof(lockh));
1979 static int ll_put_grouplock(struct inode *inode, struct file *file,
1982 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1983 struct ll_inode_info *lli = ll_i2info(inode);
1984 struct lov_stripe_md *lsm = lli->lli_smd;
1988 if (!(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
1989 /* Ugh, it's already unlocked. */
1993 if (fd->fd_gid != arg) /* Ugh? Unlocking with different gid? */
1996 fd->fd_flags &= ~(LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK);
1998 rc = ll_extent_unlock(fd, inode, lsm, LCK_GROUP, &fd->fd_cwlockh);
2003 memset(&fd->fd_cwlockh, 0, sizeof(fd->fd_cwlockh));
2008 static int join_sanity_check(struct inode *head, struct inode *tail)
2011 if ((ll_i2sbi(head)->ll_flags & LL_SBI_JOIN) == 0) {
2012 CERROR("server do not support join \n");
2015 if (!S_ISREG(tail->i_mode) || !S_ISREG(head->i_mode)) {
2016 CERROR("tail ino %lu and ino head %lu must be regular\n",
2017 head->i_ino, tail->i_ino);
2020 if (head->i_ino == tail->i_ino) {
2021 CERROR("file %lu can not be joined to itself \n", head->i_ino);
2024 if (i_size_read(head) % JOIN_FILE_ALIGN) {
2025 CERROR("hsize %llu must be times of 64K\n", i_size_read(head));
2031 static int join_file(struct inode *head_inode, struct file *head_filp,
2032 struct file *tail_filp)
2034 struct dentry *tail_dentry = tail_filp->f_dentry;
2035 struct lookup_intent oit = {.it_op = IT_OPEN,
2036 .it_flags = head_filp->f_flags|O_JOIN_FILE};
2037 struct ldlm_enqueue_info einfo = { LDLM_IBITS, LCK_CW,
2038 ll_md_blocking_ast, ldlm_completion_ast, NULL, NULL };
2040 struct lustre_handle lockh;
2041 struct md_op_data *op_data;
2046 tail_dentry = tail_filp->f_dentry;
2048 data = i_size_read(head_inode);
2049 op_data = ll_prep_md_op_data(NULL, head_inode,
2050 tail_dentry->d_parent->d_inode,
2051 tail_dentry->d_name.name,
2052 tail_dentry->d_name.len, 0,
2053 LUSTRE_OPC_ANY, &data);
2054 if (IS_ERR(op_data))
2055 RETURN(PTR_ERR(op_data));
2057 rc = md_enqueue(ll_i2mdexp(head_inode), &einfo, &oit,
2058 op_data, &lockh, NULL, 0, 0);
2060 ll_finish_md_op_data(op_data);
2064 rc = oit.d.lustre.it_status;
2066 if (rc < 0 || it_open_error(DISP_OPEN_OPEN, &oit)) {
2067 rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, &oit);
2068 ptlrpc_req_finished((struct ptlrpc_request *)
2069 oit.d.lustre.it_data);
2073 if (oit.d.lustre.it_lock_mode) { /* If we got lock - release it right
2075 ldlm_lock_decref(&lockh, oit.d.lustre.it_lock_mode);
2076 oit.d.lustre.it_lock_mode = 0;
2078 ll_release_openhandle(head_filp->f_dentry, &oit);
2080 ll_intent_release(&oit);
2084 static int ll_file_join(struct inode *head, struct file *filp,
2085 char *filename_tail)
2087 struct inode *tail = NULL, *first = NULL, *second = NULL;
2088 struct dentry *tail_dentry;
2089 struct file *tail_filp, *first_filp, *second_filp;
2090 struct ll_lock_tree first_tree, second_tree;
2091 struct ll_lock_tree_node *first_node, *second_node;
2092 struct ll_inode_info *hlli = ll_i2info(head), *tlli;
2093 int rc = 0, cleanup_phase = 0;
2096 CDEBUG(D_VFSTRACE, "VFS Op:head=%lu/%u(%p) tail %s\n",
2097 head->i_ino, head->i_generation, head, filename_tail);
2099 tail_filp = filp_open(filename_tail, O_WRONLY, 0644);
2100 if (IS_ERR(tail_filp)) {
2101 CERROR("Can not open tail file %s", filename_tail);
2102 rc = PTR_ERR(tail_filp);
2105 tail = igrab(tail_filp->f_dentry->d_inode);
2107 tlli = ll_i2info(tail);
2108 tail_dentry = tail_filp->f_dentry;
2109 LASSERT(tail_dentry);
2112 /*reorder the inode for lock sequence*/
2113 first = head->i_ino > tail->i_ino ? head : tail;
2114 second = head->i_ino > tail->i_ino ? tail : head;
2115 first_filp = head->i_ino > tail->i_ino ? filp : tail_filp;
2116 second_filp = head->i_ino > tail->i_ino ? tail_filp : filp;
2118 CDEBUG(D_INFO, "reorder object from %lu:%lu to %lu:%lu \n",
2119 head->i_ino, tail->i_ino, first->i_ino, second->i_ino);
2120 first_node = ll_node_from_inode(first, 0, OBD_OBJECT_EOF, LCK_EX);
2121 if (IS_ERR(first_node)){
2122 rc = PTR_ERR(first_node);
2125 first_tree.lt_fd = first_filp->private_data;
2126 rc = ll_tree_lock(&first_tree, first_node, NULL, 0, 0);
2131 second_node = ll_node_from_inode(second, 0, OBD_OBJECT_EOF, LCK_EX);
2132 if (IS_ERR(second_node)){
2133 rc = PTR_ERR(second_node);
2136 second_tree.lt_fd = second_filp->private_data;
2137 rc = ll_tree_lock(&second_tree, second_node, NULL, 0, 0);
2142 rc = join_sanity_check(head, tail);
2146 rc = join_file(head, filp, tail_filp);
2150 switch (cleanup_phase) {
2152 ll_tree_unlock(&second_tree);
2153 obd_cancel_unused(ll_i2dtexp(second),
2154 ll_i2info(second)->lli_smd, 0, NULL);
2156 ll_tree_unlock(&first_tree);
2157 obd_cancel_unused(ll_i2dtexp(first),
2158 ll_i2info(first)->lli_smd, 0, NULL);
2160 filp_close(tail_filp, 0);
2163 if (head && rc == 0) {
2164 obd_free_memmd(ll_i2sbi(head)->ll_dt_exp,
2166 hlli->lli_smd = NULL;
2171 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2177 int ll_release_openhandle(struct dentry *dentry, struct lookup_intent *it)
2179 struct inode *inode = dentry->d_inode;
2180 struct obd_client_handle *och;
2186 /* Root ? Do nothing. */
2187 if (dentry->d_inode->i_sb->s_root == dentry)
2190 /* No open handle to close? Move away */
2191 if (!it_disposition(it, DISP_OPEN_OPEN))
2194 LASSERT(it_open_error(DISP_OPEN_OPEN, it) == 0);
2196 OBD_ALLOC(och, sizeof(*och));
2198 GOTO(out, rc = -ENOMEM);
2200 ll_och_fill(ll_i2sbi(inode)->ll_md_exp,
2201 ll_i2info(inode), it, och);
2203 rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
2206 /* this one is in place of ll_file_open */
2207 ptlrpc_req_finished(it->d.lustre.it_data);
2208 it_clear_disposition(it, DISP_ENQ_OPEN_REF);
2212 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
2215 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2219 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),cmd=%x\n", inode->i_ino,
2220 inode->i_generation, inode, cmd);
2221 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
2223 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
2224 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
2228 case LL_IOC_GETFLAGS:
2229 /* Get the current value of the file flags */
2230 return put_user(fd->fd_flags, (int *)arg);
2231 case LL_IOC_SETFLAGS:
2232 case LL_IOC_CLRFLAGS:
2233 /* Set or clear specific file flags */
2234 /* XXX This probably needs checks to ensure the flags are
2235 * not abused, and to handle any flag side effects.
2237 if (get_user(flags, (int *) arg))
2240 if (cmd == LL_IOC_SETFLAGS) {
2241 if ((flags & LL_FILE_IGNORE_LOCK) &&
2242 !(file->f_flags & O_DIRECT)) {
2243 CERROR("%s: unable to disable locking on "
2244 "non-O_DIRECT file\n", current->comm);
2248 fd->fd_flags |= flags;
2250 fd->fd_flags &= ~flags;
2253 case LL_IOC_LOV_SETSTRIPE:
2254 RETURN(ll_lov_setstripe(inode, file, arg));
2255 case LL_IOC_LOV_SETEA:
2256 RETURN(ll_lov_setea(inode, file, arg));
2257 case LL_IOC_LOV_GETSTRIPE:
2258 RETURN(ll_lov_getstripe(inode, arg));
2259 case LL_IOC_RECREATE_OBJ:
2260 RETURN(ll_lov_recreate_obj(inode, file, arg));
2261 case EXT3_IOC_GETFLAGS:
2262 case EXT3_IOC_SETFLAGS:
2263 RETURN(ll_iocontrol(inode, file, cmd, arg));
2264 case EXT3_IOC_GETVERSION_OLD:
2265 case EXT3_IOC_GETVERSION:
2266 RETURN(put_user(inode->i_generation, (int *)arg));
2271 ftail = getname((const char *)arg);
2273 RETURN(PTR_ERR(ftail));
2274 rc = ll_file_join(inode, file, ftail);
2278 case LL_IOC_GROUP_LOCK:
2279 RETURN(ll_get_grouplock(inode, file, arg));
2280 case LL_IOC_GROUP_UNLOCK:
2281 RETURN(ll_put_grouplock(inode, file, arg));
2282 case IOC_OBD_STATFS:
2283 RETURN(ll_obd_statfs(inode, (void *)arg));
2285 /* We need to special case any other ioctls we want to handle,
2286 * to send them to the MDS/OST as appropriate and to properly
2287 * network encode the arg field.
2288 case EXT3_IOC_SETVERSION_OLD:
2289 case EXT3_IOC_SETVERSION:
2291 case LL_IOC_FLUSHCTX:
2292 RETURN(ll_flush_ctx(inode));
2293 case LL_IOC_GETFACL: {
2294 struct rmtacl_ioctl_data ioc;
2296 if (copy_from_user(&ioc, (void *)arg, sizeof(ioc)))
2299 RETURN(ll_ioctl_getfacl(inode, &ioc));
2301 case LL_IOC_SETFACL: {
2302 struct rmtacl_ioctl_data ioc;
2304 if (copy_from_user(&ioc, (void *)arg, sizeof(ioc)))
2307 RETURN(ll_ioctl_setfacl(inode, &ioc));
2313 ll_iocontrol_call(inode, file, cmd, arg, &err))
2316 RETURN(obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
2322 loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
2324 struct inode *inode = file->f_dentry->d_inode;
2325 struct ll_inode_info *lli = ll_i2info(inode);
2326 struct lov_stripe_md *lsm = lli->lli_smd;
2329 retval = offset + ((origin == 2) ? i_size_read(inode) :
2330 (origin == 1) ? file->f_pos : 0);
2331 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), to=%Lu=%#Lx(%s)\n",
2332 inode->i_ino, inode->i_generation, inode, retval, retval,
2333 origin == 2 ? "SEEK_END": origin == 1 ? "SEEK_CUR" : "SEEK_SET");
2334 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK, 1);
2336 if (origin == 2) { /* SEEK_END */
2337 int nonblock = 0, rc;
2339 if (file->f_flags & O_NONBLOCK)
2340 nonblock = LDLM_FL_BLOCK_NOWAIT;
2343 rc = ll_glimpse_size(inode, nonblock);
2348 ll_inode_size_lock(inode, 0);
2349 offset += i_size_read(inode);
2350 ll_inode_size_unlock(inode, 0);
2351 } else if (origin == 1) { /* SEEK_CUR */
2352 offset += file->f_pos;
2356 if (offset >= 0 && offset <= ll_file_maxbytes(inode)) {
2357 if (offset != file->f_pos) {
2358 file->f_pos = offset;
2359 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
2361 file->f_version = ++event;
2370 int ll_fsync(struct file *file, struct dentry *dentry, int data)
2372 struct inode *inode = dentry->d_inode;
2373 struct ll_inode_info *lli = ll_i2info(inode);
2374 struct lov_stripe_md *lsm = lli->lli_smd;
2375 struct ptlrpc_request *req;
2376 struct obd_capa *oc;
2379 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
2380 inode->i_generation, inode);
2381 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1);
2383 /* fsync's caller has already called _fdata{sync,write}, we want
2384 * that IO to finish before calling the osc and mdc sync methods */
2385 rc = filemap_fdatawait(inode->i_mapping);
2387 /* catch async errors that were recorded back when async writeback
2388 * failed for pages in this mapping. */
2389 err = lli->lli_async_rc;
2390 lli->lli_async_rc = 0;
2394 err = lov_test_and_clear_async_rc(lsm);
2399 oc = ll_mdscapa_get(inode);
2400 err = md_sync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), oc,
2406 ptlrpc_req_finished(req);
2413 RETURN(rc ? rc : -ENOMEM);
2415 oa->o_id = lsm->lsm_object_id;
2416 oa->o_gr = lsm->lsm_object_gr;
2417 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
2418 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
2419 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
2422 oc = ll_osscapa_get(inode, CAPA_OPC_OSS_WRITE);
2423 err = obd_sync(ll_i2sbi(inode)->ll_dt_exp, oa, lsm,
2424 0, OBD_OBJECT_EOF, oc);
2434 int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
2436 struct inode *inode = file->f_dentry->d_inode;
2437 struct ll_sb_info *sbi = ll_i2sbi(inode);
2438 struct ldlm_res_id res_id =
2439 { .name = { fid_seq(ll_inode2fid(inode)),
2440 fid_oid(ll_inode2fid(inode)),
2441 fid_ver(ll_inode2fid(inode)),
2443 struct ldlm_enqueue_info einfo = { LDLM_FLOCK, 0, NULL,
2444 ldlm_flock_completion_ast, NULL, file_lock };
2445 struct lustre_handle lockh = {0};
2446 ldlm_policy_data_t flock;
2451 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu file_lock=%p\n",
2452 inode->i_ino, file_lock);
2454 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK, 1);
2456 if (file_lock->fl_flags & FL_FLOCK) {
2457 LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK));
2458 /* set missing params for flock() calls */
2459 file_lock->fl_end = OFFSET_MAX;
2460 file_lock->fl_pid = current->tgid;
2462 flock.l_flock.pid = file_lock->fl_pid;
2463 flock.l_flock.start = file_lock->fl_start;
2464 flock.l_flock.end = file_lock->fl_end;
2466 switch (file_lock->fl_type) {
2468 einfo.ei_mode = LCK_PR;
2471 /* An unlock request may or may not have any relation to
2472 * existing locks so we may not be able to pass a lock handle
2473 * via a normal ldlm_lock_cancel() request. The request may even
2474 * unlock a byte range in the middle of an existing lock. In
2475 * order to process an unlock request we need all of the same
2476 * information that is given with a normal read or write record
2477 * lock request. To avoid creating another ldlm unlock (cancel)
2478 * message we'll treat a LCK_NL flock request as an unlock. */
2479 einfo.ei_mode = LCK_NL;
2482 einfo.ei_mode = LCK_PW;
2485 CERROR("unknown fcntl lock type: %d\n", file_lock->fl_type);
2500 flags = LDLM_FL_BLOCK_NOWAIT;
2506 flags = LDLM_FL_TEST_LOCK;
2507 /* Save the old mode so that if the mode in the lock changes we
2508 * can decrement the appropriate reader or writer refcount. */
2509 file_lock->fl_type = einfo.ei_mode;
2512 CERROR("unknown fcntl lock command: %d\n", cmd);
2516 CDEBUG(D_DLMTRACE, "inode=%lu, pid=%u, flags=%#x, mode=%u, "
2517 "start="LPU64", end="LPU64"\n", inode->i_ino, flock.l_flock.pid,
2518 flags, einfo.ei_mode, flock.l_flock.start, flock.l_flock.end);
2520 rc = ldlm_cli_enqueue(sbi->ll_md_exp, NULL, &einfo, &res_id,
2521 &flock, &flags, NULL, 0, NULL, &lockh, 0);
2522 if ((file_lock->fl_flags & FL_FLOCK) && (rc == 0))
2523 ll_flock_lock_file_wait(file, file_lock, (cmd == F_SETLKW));
2524 #ifdef HAVE_F_OP_FLOCK
2525 if ((file_lock->fl_flags & FL_POSIX) && (rc == 0) &&
2526 !(flags & LDLM_FL_TEST_LOCK))
2527 posix_lock_file_wait(file, file_lock);
2533 int ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock)
2540 int ll_have_md_lock(struct inode *inode, __u64 bits)
2542 struct lustre_handle lockh;
2543 ldlm_policy_data_t policy = { .l_inodebits = {bits}};
2551 fid = &ll_i2info(inode)->lli_fid;
2552 CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid));
2554 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK;
2555 if (md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS, &policy,
2556 LCK_CR|LCK_CW|LCK_PR, &lockh)) {
2563 static int ll_inode_revalidate_fini(struct inode *inode, int rc) {
2564 if (rc == -ENOENT) { /* Already unlinked. Just update nlink
2565 * and return success */
2567 /* This path cannot be hit for regular files unless in
2568 * case of obscure races, so no need to to validate
2570 if (!S_ISREG(inode->i_mode) &&
2571 !S_ISDIR(inode->i_mode))
2576 CERROR("failure %d inode %lu\n", rc, inode->i_ino);
2584 int ll_inode_revalidate_it(struct dentry *dentry, struct lookup_intent *it)
2586 struct inode *inode = dentry->d_inode;
2587 struct ptlrpc_request *req = NULL;
2588 struct ll_sb_info *sbi;
2589 struct obd_export *exp;
2594 CERROR("REPORT THIS LINE TO PETER\n");
2597 sbi = ll_i2sbi(inode);
2599 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),name=%s\n",
2600 inode->i_ino, inode->i_generation, inode, dentry->d_name.name);
2602 exp = ll_i2mdexp(inode);
2604 if (exp->exp_connect_flags & OBD_CONNECT_ATTRFID) {
2605 struct lookup_intent oit = { .it_op = IT_GETATTR };
2606 struct md_op_data *op_data;
2608 /* Call getattr by fid, so do not provide name at all. */
2609 op_data = ll_prep_md_op_data(NULL, dentry->d_parent->d_inode,
2610 dentry->d_inode, NULL, 0, 0,
2611 LUSTRE_OPC_ANY, NULL);
2612 if (IS_ERR(op_data))
2613 RETURN(PTR_ERR(op_data));
2615 oit.it_flags |= O_CHECK_STALE;
2616 rc = md_intent_lock(exp, op_data, NULL, 0,
2617 /* we are not interested in name
2620 ll_md_blocking_ast, 0);
2621 ll_finish_md_op_data(op_data);
2622 oit.it_flags &= ~O_CHECK_STALE;
2624 rc = ll_inode_revalidate_fini(inode, rc);
2628 rc = ll_revalidate_it_finish(req, DLM_REPLY_REC_OFF, &oit, dentry);
2630 ll_intent_release(&oit);
2634 /* Unlinked? Unhash dentry, so it is not picked up later by
2635 do_lookup() -> ll_revalidate_it(). We cannot use d_drop
2636 here to preserve get_cwd functionality on 2.6.
2638 if (!dentry->d_inode->i_nlink) {
2639 spin_lock(&dcache_lock);
2640 ll_drop_dentry(dentry);
2641 spin_unlock(&dcache_lock);
2644 ll_lookup_finish_locks(&oit, dentry);
2645 } else if (!ll_have_md_lock(dentry->d_inode,
2646 MDS_INODELOCK_UPDATE)) {
2647 struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode);
2648 obd_valid valid = OBD_MD_FLGETATTR;
2649 struct obd_capa *oc;
2652 if (S_ISREG(inode->i_mode)) {
2653 rc = ll_get_max_mdsize(sbi, &ealen);
2656 valid |= OBD_MD_FLEASIZE | OBD_MD_FLMODEASIZE;
2658 /* Once OBD_CONNECT_ATTRFID is not supported, we can't find one
2659 * capa for this inode. Because we only keep capas of dirs
2661 oc = ll_mdscapa_get(inode);
2662 rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode), oc, valid,
2666 rc = ll_inode_revalidate_fini(inode, rc);
2670 rc = ll_prep_inode(&inode, req, REPLY_REC_OFF,
2676 /* if object not yet allocated, don't validate size */
2677 if (ll_i2info(inode)->lli_smd == NULL)
2680 /* ll_glimpse_size will prefer locally cached writes if they extend
2682 rc = ll_glimpse_size(inode, 0);
2685 ptlrpc_req_finished(req);
2689 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
2690 struct lookup_intent *it, struct kstat *stat)
2692 struct inode *inode = de->d_inode;
2695 res = ll_inode_revalidate_it(de, it);
2696 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETATTR, 1);
2701 stat->dev = inode->i_sb->s_dev;
2702 stat->ino = inode->i_ino;
2703 stat->mode = inode->i_mode;
2704 stat->nlink = inode->i_nlink;
2705 stat->uid = inode->i_uid;
2706 stat->gid = inode->i_gid;
2707 stat->rdev = kdev_t_to_nr(inode->i_rdev);
2708 stat->atime = inode->i_atime;
2709 stat->mtime = inode->i_mtime;
2710 stat->ctime = inode->i_ctime;
2711 #ifdef HAVE_INODE_BLKSIZE
2712 stat->blksize = inode->i_blksize;
2714 stat->blksize = 1 << inode->i_blkbits;
2717 ll_inode_size_lock(inode, 0);
2718 stat->size = i_size_read(inode);
2719 stat->blocks = inode->i_blocks;
2720 ll_inode_size_unlock(inode, 0);
2724 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
2726 struct lookup_intent it = { .it_op = IT_GETATTR };
2728 return ll_getattr_it(mnt, de, &it, stat);
2732 int lustre_check_acl(struct inode *inode, int mask)
2734 #ifdef CONFIG_FS_POSIX_ACL
2735 struct ll_inode_info *lli = ll_i2info(inode);
2736 struct posix_acl *acl;
2740 spin_lock(&lli->lli_lock);
2741 acl = posix_acl_dup(lli->lli_posix_acl);
2742 spin_unlock(&lli->lli_lock);
2747 rc = posix_acl_permission(inode, acl, mask);
2748 posix_acl_release(acl);
2756 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10))
2757 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
2759 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
2760 inode->i_ino, inode->i_generation, inode, mask);
2761 if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
2762 return lustre_check_remote_perm(inode, mask);
2764 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
2765 return generic_permission(inode, mask, lustre_check_acl);
2768 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
2770 int mode = inode->i_mode;
2773 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), mask %o\n",
2774 inode->i_ino, inode->i_generation, inode, mask);
2776 if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT)
2777 return lustre_check_remote_perm(inode, mask);
2779 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1);
2781 if ((mask & MAY_WRITE) && IS_RDONLY(inode) &&
2782 (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
2784 if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
2786 if (current->fsuid == inode->i_uid) {
2789 if (((mode >> 3) & mask & S_IRWXO) != mask)
2791 rc = lustre_check_acl(inode, mask);
2795 goto check_capabilities;
2799 if (in_group_p(inode->i_gid))
2802 if ((mode & mask & S_IRWXO) == mask)
2806 if (!(mask & MAY_EXEC) ||
2807 (inode->i_mode & S_IXUGO) || S_ISDIR(inode->i_mode))
2808 if (capable(CAP_DAC_OVERRIDE))
2811 if (capable(CAP_DAC_READ_SEARCH) && ((mask == MAY_READ) ||
2812 (S_ISDIR(inode->i_mode) && !(mask & MAY_WRITE))))
2819 /* -o localflock - only provides locally consistent flock locks */
2820 struct file_operations ll_file_operations = {
2821 .read = ll_file_read,
2822 .write = ll_file_write,
2823 .ioctl = ll_file_ioctl,
2824 .open = ll_file_open,
2825 .release = ll_file_release,
2826 .mmap = ll_file_mmap,
2827 .llseek = ll_file_seek,
2828 .sendfile = ll_file_sendfile,
2832 struct file_operations ll_file_operations_flock = {
2833 .read = ll_file_read,
2834 .write = ll_file_write,
2835 .ioctl = ll_file_ioctl,
2836 .open = ll_file_open,
2837 .release = ll_file_release,
2838 .mmap = ll_file_mmap,
2839 .llseek = ll_file_seek,
2840 .sendfile = ll_file_sendfile,
2842 #ifdef HAVE_F_OP_FLOCK
2843 .flock = ll_file_flock,
2845 .lock = ll_file_flock
2848 /* These are for -o noflock - to return ENOSYS on flock calls */
2849 struct file_operations ll_file_operations_noflock = {
2850 .read = ll_file_read,
2851 .write = ll_file_write,
2852 .ioctl = ll_file_ioctl,
2853 .open = ll_file_open,
2854 .release = ll_file_release,
2855 .mmap = ll_file_mmap,
2856 .llseek = ll_file_seek,
2857 .sendfile = ll_file_sendfile,
2859 #ifdef HAVE_F_OP_FLOCK
2860 .flock = ll_file_noflock,
2862 .lock = ll_file_noflock
2865 struct inode_operations ll_file_inode_operations = {
2866 #ifdef HAVE_VFS_INTENT_PATCHES
2867 .setattr_raw = ll_setattr_raw,
2869 .setattr = ll_setattr,
2870 .truncate = ll_truncate,
2871 .getattr = ll_getattr,
2872 .permission = ll_inode_permission,
2873 .setxattr = ll_setxattr,
2874 .getxattr = ll_getxattr,
2875 .listxattr = ll_listxattr,
2876 .removexattr = ll_removexattr,
2879 /* dynamic ioctl number support routins */
2880 static struct llioc_ctl_data {
2881 struct rw_semaphore ioc_sem;
2882 struct list_head ioc_head;
2884 __RWSEM_INITIALIZER(llioc.ioc_sem),
2885 CFS_LIST_HEAD_INIT(llioc.ioc_head)
2890 struct list_head iocd_list;
2891 unsigned int iocd_size;
2892 llioc_callback_t iocd_cb;
2893 unsigned int iocd_count;
2894 unsigned int iocd_cmd[0];
2897 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd)
2900 struct llioc_data *in_data = NULL;
2903 if (cb == NULL || cmd == NULL ||
2904 count > LLIOC_MAX_CMD || count < 0)
2907 size = sizeof(*in_data) + count * sizeof(unsigned int);
2908 OBD_ALLOC(in_data, size);
2909 if (in_data == NULL)
2912 memset(in_data, 0, sizeof(*in_data));
2913 in_data->iocd_size = size;
2914 in_data->iocd_cb = cb;
2915 in_data->iocd_count = count;
2916 memcpy(in_data->iocd_cmd, cmd, sizeof(unsigned int) * count);
2918 down_write(&llioc.ioc_sem);
2919 list_add_tail(&in_data->iocd_list, &llioc.ioc_head);
2920 up_write(&llioc.ioc_sem);
2925 void ll_iocontrol_unregister(void *magic)
2927 struct llioc_data *tmp;
2932 down_write(&llioc.ioc_sem);
2933 list_for_each_entry(tmp, &llioc.ioc_head, iocd_list) {
2935 unsigned int size = tmp->iocd_size;
2937 list_del(&tmp->iocd_list);
2938 up_write(&llioc.ioc_sem);
2940 OBD_FREE(tmp, size);
2944 up_write(&llioc.ioc_sem);
2946 CWARN("didn't find iocontrol register block with magic: %p\n", magic);
2949 EXPORT_SYMBOL(ll_iocontrol_register);
2950 EXPORT_SYMBOL(ll_iocontrol_unregister);
2952 enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file,
2953 unsigned int cmd, unsigned long arg, int *rcp)
2955 enum llioc_iter ret = LLIOC_CONT;
2956 struct llioc_data *data;
2957 int rc = -EINVAL, i;
2959 down_read(&llioc.ioc_sem);
2960 list_for_each_entry(data, &llioc.ioc_head, iocd_list) {
2961 for (i = 0; i < data->iocd_count; i++) {
2962 if (cmd != data->iocd_cmd[i])
2965 ret = data->iocd_cb(inode, file, cmd, arg, data, &rc);
2969 if (ret == LLIOC_STOP)
2972 up_read(&llioc.ioc_sem);