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 <linux/lustre_dlm.h>
27 #include <linux/lustre_lite.h>
28 #include <linux/pagemap.h>
29 #include <linux/file.h>
30 #include <linux/lustre_acl.h>
31 #include <linux/lustre_sec.h>
32 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
33 #include <linux/lustre_compat25.h>
35 #include <linux/obd_lov.h>
36 #include <linux/lustre_audit.h>
37 #include "llite_internal.h"
39 __u64 lov_merge_size(struct lov_stripe_md *lsm, int kms);
40 __u64 lov_merge_blocks(struct lov_stripe_md *lsm);
41 __u64 lov_merge_mtime(struct lov_stripe_md *lsm, __u64 current_time);
43 int ll_validate_size(struct inode *inode, __u64 *size, __u64 *blocks)
45 ldlm_policy_data_t extent = { .l_extent = { 0, OBD_OBJECT_EOF } };
46 struct obd_export *exp = ll_i2sbi(inode)->ll_dt_exp;
47 struct ll_inode_info *lli = ll_i2info(inode);
48 struct lustre_handle match_lockh = {0};
52 if (lli->lli_smd == NULL)
55 LASSERT(size != NULL && blocks != NULL);
57 flags = LDLM_FL_TEST_LOCK | LDLM_FL_CBPENDING | LDLM_FL_BLOCK_GRANTED;
58 rc = obd_match(exp, lli->lli_smd, LDLM_EXTENT, &extent,
59 LCK_PR | LCK_PW, &flags, inode, &match_lockh);
61 /* we have no all needed locks,
62 * so we don't know actual size */
66 /* we know actual size! */
67 down(&lli->lli_size_sem);
68 *size = lov_merge_size(lli->lli_smd, 0);
69 *blocks = lov_merge_blocks(lli->lli_smd);
70 up(&lli->lli_size_sem);
76 int ll_md_och_close(struct obd_export *md_exp, struct inode *inode,
77 struct obd_client_handle *och, int dirty)
79 struct ptlrpc_request *req = NULL;
80 struct mdc_op_data *op_data;
81 struct obd_device *obd;
86 obd = class_exp2obd(md_exp);
88 CERROR("Invalid MDC connection handle "LPX64"\n",
89 md_exp->exp_handle.h_cookie);
93 /* here we check if this is forced umount. If so this is called on
94 * canceling "open lock" and we do not call md_close() in this case , as
95 * it will not successful, as import is already deactivated. */
96 if (obd->obd_no_recov)
99 /* prepare @op_data for close request */
100 OBD_ALLOC(op_data, sizeof(*op_data));
104 memset(op_data, 0, sizeof(*op_data));
106 valid = (OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME |
107 OBD_MD_FLTYPE | OBD_MD_FLMODE | OBD_MD_FLEPOCH |
110 ll_inode2mdc_data(op_data, inode, valid);
112 if (0 /* ll_is_inode_dirty(inode) */) {
113 op_data->flags = MDS_BFLAG_UNCOMMITTED_WRITES;
114 op_data->valid |= OBD_MD_FLFLAGS;
118 /* we modified data through this handle */
119 op_data->flags |= MDS_BFLAG_DIRTY_EPOCH;
120 op_data->valid |= OBD_MD_FLFLAGS;
121 if (ll_validate_size(inode, &op_data->size, &op_data->blocks))
122 op_data->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
125 rc = md_close(md_exp, op_data, och, &req);
126 OBD_FREE(op_data, sizeof(*op_data));
129 /* we are the last writer, so the MDS has instructed us to get
130 * the file size and any write cookies, then close again. */
132 //ll_queue_done_writing(inode);
135 CERROR("inode %lu mdc close failed: rc = %d\n",
136 (unsigned long)inode->i_ino, rc);
139 ptlrpc_req_finished(req);
142 mdc_clear_open_replay_data(md_exp, och);
144 capa_put(och->och_capa, CLIENT_CAPA);
145 och->och_fh.cookie = DEAD_HANDLE_MAGIC;
146 OBD_FREE(och, sizeof *och);
150 int ll_md_real_close(struct obd_export *md_exp,
151 struct inode *inode, int flags)
153 struct ll_inode_info *lli = ll_i2info(inode);
154 int freeing = inode->i_state & I_FREEING;
155 struct obd_client_handle **och_p;
156 struct obd_client_handle *och;
158 int rc = 0, dirty = 0;
161 if (flags & FMODE_WRITE) {
162 och_p = &lli->lli_mds_write_och;
163 och_usecount = &lli->lli_open_fd_write_count;
164 } else if (flags & FMODE_EXEC) {
165 och_p = &lli->lli_mds_exec_och;
166 och_usecount = &lli->lli_open_fd_exec_count;
168 och_p = &lli->lli_mds_read_och;
169 och_usecount = &lli->lli_open_fd_read_count;
172 down(&lli->lli_och_sem);
173 if (*och_usecount) { /* There are still users of this handle, so
175 up(&lli->lli_och_sem);
178 if (ll_is_inode_dirty(inode)) {
179 /* the inode still has dirty pages, let's close later */
180 CDEBUG(D_INODE, "inode %lu/%u still has dirty pages\n",
181 inode->i_ino, inode->i_generation);
182 LASSERT(freeing == 0);
183 ll_queue_done_writing(inode);
184 up(&lli->lli_och_sem);
188 if (LLI_DIRTY_HANDLE(inode) && (flags & FMODE_WRITE)) {
189 clear_bit(LLI_F_DIRTY_HANDLE, &lli->lli_flags);
191 } else if (0 && !(flags & FMODE_SYNC) && !freeing) {
192 /* in order to speed up creation rate we pass
193 * closing to dedicated thread so we don't need
194 * to wait for close reply here -bzzz */
195 ll_queue_done_writing(inode);
196 up(&lli->lli_och_sem);
203 up(&lli->lli_och_sem);
206 * there might be a race and somebody have freed this och
207 * already. Another way to have this twice called is if file closing
208 * will fail due to netwok problems and on umount lock will be canceled
209 * and this will be called from block_ast callack.
211 if (och && och->och_fh.cookie != DEAD_HANDLE_MAGIC)
212 rc = ll_md_och_close(md_exp, inode, och, dirty);
217 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
220 struct ll_file_data *fd = file->private_data;
221 struct ll_inode_info *lli = ll_i2info(inode);
225 /* clear group lock, if present */
226 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
227 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
228 fd->fd_flags &= ~(LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK);
229 rc = ll_extent_unlock(fd, inode, lsm, LCK_GROUP,
233 /* Let's see if we have good enough OPEN lock on the file and if
234 we can skip talking to MDS */
235 if (file->f_dentry->d_inode) {
237 struct obd_device *obddev;
238 struct lustre_handle lockh;
239 int flags = LDLM_FL_BLOCK_GRANTED;
240 struct ldlm_res_id file_res_id = {.name = {id_fid(&lli->lli_id),
241 id_group(&lli->lli_id)}};
242 ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_OPEN}};
244 down(&lli->lli_och_sem);
245 if (fd->fd_omode & FMODE_WRITE) {
247 LASSERT(lli->lli_open_fd_write_count);
248 lli->lli_open_fd_write_count--;
249 } else if (fd->fd_omode & FMODE_EXEC) {
251 LASSERT(lli->lli_open_fd_exec_count);
252 lli->lli_open_fd_exec_count--;
255 LASSERT(lli->lli_open_fd_read_count);
256 lli->lli_open_fd_read_count--;
258 up(&lli->lli_och_sem);
260 obddev = md_get_real_obd(md_exp, &lli->lli_id);
261 if (!ldlm_lock_match(obddev->obd_namespace, flags, &file_res_id,
262 LDLM_IBITS, &policy, lockmode, &lockh))
264 rc = ll_md_real_close(md_exp, file->f_dentry->d_inode,
267 ldlm_lock_decref(&lockh, lockmode);
271 file->private_data = NULL;
272 OBD_SLAB_FREE(fd, ll_file_data_slab, sizeof(*fd));
276 /* While this returns an error code, fput() the caller does not, so we need
277 * to make every effort to clean up all of our state here. Also, applications
278 * rarely check close errors and even if an error is returned they will not
279 * re-try the close call.
281 int ll_file_release(struct inode *inode, struct file *file)
283 struct ll_file_data *fd;
284 struct ll_sb_info *sbi = ll_i2sbi(inode);
288 CDEBUG(D_VFSTRACE, "VFS Op:inode="DLID4"(%p)\n",
289 OLID4(&ll_i2info(inode)->lli_id), inode);
291 /* don't do anything for / */
292 if (inode->i_sb->s_root == file->f_dentry)
295 lprocfs_counter_incr(sbi->ll_stats, LPROC_LL_RELEASE);
296 fd = (struct ll_file_data *)file->private_data;
299 rc = ll_md_close(sbi->ll_md_exp, inode, file);
303 static int ll_intent_file_open(struct file *file, void *lmm,
304 int lmmsize, struct lookup_intent *itp)
306 struct ll_sb_info *sbi = ll_i2sbi(file->f_dentry->d_inode);
307 const char *name = (char *)file->f_dentry->d_name.name;
308 struct dentry *parent = file->f_dentry->d_parent;
309 const int len = file->f_dentry->d_name.len;
310 struct lustre_handle lockh;
311 struct mdc_op_data *op_data;
317 OBD_ALLOC(op_data, sizeof(*op_data));
321 ll_prepare_mdc_data(op_data, parent->d_inode, NULL,
324 rc = md_enqueue(sbi->ll_md_exp, LDLM_IBITS, itp, LCK_PR, op_data,
325 &lockh, lmm, lmmsize, ldlm_completion_ast,
326 ll_mdc_blocking_ast, NULL);
327 OBD_FREE(op_data, sizeof(*op_data));
329 if (LUSTRE_IT(itp)->it_lock_mode)
330 memcpy(&LUSTRE_IT(itp)->it_lock_handle,
331 &lockh, sizeof(lockh));
334 CERROR("lock enqueue: err: %d\n", rc);
339 int ll_och_fill(struct inode *inode, struct lookup_intent *it,
340 struct obd_client_handle *och)
342 struct ptlrpc_request *req = LUSTRE_IT(it)->it_data;
343 struct ll_inode_info *lli = ll_i2info(inode);
344 struct mds_body *body;
349 body = lustre_msg_buf (req->rq_repmsg, 1, sizeof (*body));
350 LASSERT (body != NULL); /* reply already checked out */
351 LASSERT_REPSWABBED (req, 1); /* and swabbed down */
353 memcpy(&och->och_fh, &body->handle, sizeof(body->handle));
354 och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
355 lli->lli_io_epoch = body->io_epoch;
356 mdc_set_open_replay_data(ll_i2mdexp(inode), och,
357 LUSTRE_IT(it)->it_data);
359 if (S_ISREG(inode->i_mode) && (body->valid & OBD_MD_CAPA))
360 rc = ll_set_och_capa(inode, it, och);
364 int ll_local_open(struct file *file, struct lookup_intent *it,
365 struct obd_client_handle *och)
367 struct ll_file_data *fd;
372 rc = ll_och_fill(file->f_dentry->d_inode, it, och);
377 LASSERTF(file->private_data == NULL, "file %.*s/%.*s ino %lu/%u (%o)\n",
378 file->f_dentry->d_name.len, file->f_dentry->d_name.name,
379 file->f_dentry->d_parent->d_name.len,
380 file->f_dentry->d_parent->d_name.name,
381 file->f_dentry->d_inode->i_ino,
382 file->f_dentry->d_inode->i_generation,
383 file->f_dentry->d_inode->i_mode);
385 OBD_SLAB_ALLOC(fd, ll_file_data_slab, SLAB_KERNEL, sizeof *fd);
387 /* We can't handle this well without reorganizing ll_file_open and
388 * ll_md_close(), so don't even try right now. */
391 file->private_data = fd;
392 ll_readahead_init(file->f_dentry->d_inode, &fd->fd_ras);
393 fd->fd_omode = it->it_flags;
398 /* Open a file, and (for the very first open) create objects on the OSTs at
399 * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object
400 * creation or open until ll_lov_setstripe() ioctl is called. We grab
401 * lli_open_sem to ensure no other process will create objects, send the
402 * stripe MD to the MDS, or try to destroy the objects if that fails.
404 * If we already have the stripe MD locally then we don't request it in
405 * mdc_open(), by passing a lmm_size = 0.
407 * It is up to the application to ensure no other processes open this file
408 * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be
409 * used. We might be able to avoid races of that sort by getting lli_open_sem
410 * before returning in the O_LOV_DELAY_CREATE case and dropping it here
411 * or in ll_file_release(), but I'm not sure that is desirable/necessary.
413 int ll_file_open(struct inode *inode, struct file *file)
415 struct ll_inode_info *lli = ll_i2info(inode);
416 struct lookup_intent *it, oit = { .it_op = IT_OPEN,
417 .it_flags = file->f_flags };
418 struct lov_stripe_md *lsm;
419 struct ptlrpc_request *req;
421 struct obd_client_handle **och_p = NULL;
422 __u64 *och_usecount = NULL;
425 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), flags %o\n",
426 inode->i_ino, inode->i_generation, inode, file->f_flags);
428 /* don't do anything for / */
429 if (inode->i_sb->s_root == file->f_dentry)
432 if ((file->f_flags+1) & O_ACCMODE)
434 if (file->f_flags & O_TRUNC)
439 * sometimes LUSTRE_IT(it) may not be allocated like opening file by
440 * dentry_open() from GNS stuff.
442 if (!it || !LUSTRE_IT(it)) {
444 rc = ll_intent_alloc(it);
449 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_OPEN);
452 * mdc_intent_lock() didn't get a request ref if there was an open
453 * error, so don't do cleanup on the * request here (bug 3430)
455 if (LUSTRE_IT(it)->it_disposition) {
456 rc = it_open_error(DISP_OPEN_OPEN, it);
461 /* Let's see if we have file open on MDS already. */
462 if (it->it_flags & FMODE_WRITE) {
463 och_p = &lli->lli_mds_write_och;
464 och_usecount = &lli->lli_open_fd_write_count;
465 } else if (it->it_flags & FMODE_EXEC) {
466 och_p = &lli->lli_mds_exec_och;
467 och_usecount = &lli->lli_open_fd_exec_count;
469 och_p = &lli->lli_mds_read_och;
470 och_usecount = &lli->lli_open_fd_read_count;
473 rc = ll_crypto_decrypt_key(inode, it);
477 down(&lli->lli_och_sem);
478 if (*och_p) { /* Open handle is present */
479 if (it_disposition(it, DISP_LOOKUP_POS) && /* Positive lookup */
480 it_disposition(it, DISP_OPEN_OPEN)) { /* & OPEN happened */
481 struct obd_client_handle *och;
482 /* Well, there's extra open request that we do not need,
483 let's close it somehow*/
484 OBD_ALLOC(och, sizeof (struct obd_client_handle));
486 up(&lli->lli_och_sem);
490 rc = ll_och_fill(inode, it, och);
492 up(&lli->lli_och_sem);
496 /* ll_md_och_close() will free och */
497 ll_md_och_close(ll_i2mdexp(inode), inode, och, 0);
501 rc = ll_local_open(file, it, NULL);
505 LASSERT(*och_usecount == 0);
506 OBD_ALLOC(*och_p, sizeof (struct obd_client_handle));
508 GOTO(out, rc = -ENOMEM);
511 if (!it || !LUSTRE_IT(it) || !LUSTRE_IT(it)->it_disposition) {
513 * we are going to replace intent here, and that may
514 * possibly change access mode (FMODE_EXEC can only be
515 * set in intent), but I hope it never happens (I was
516 * not able to trigger it yet at least) -- green
519 /* FIXME: FMODE_EXEC is not covered by O_ACCMODE! */
520 LASSERT(!(it->it_flags & FMODE_EXEC));
521 LASSERTF((it->it_flags & O_ACCMODE) ==
522 (oit.it_flags & O_ACCMODE), "Changing intent "
523 "flags %x to incompatible %x\n", it->it_flags,
526 rc = ll_intent_file_open(file, NULL, 0, it);
529 rc = it_open_error(DISP_OPEN_OPEN, it);
531 GOTO(out_och_free, rc);
533 mdc_set_lock_data(NULL, &LUSTRE_IT(it)->it_lock_handle,
534 file->f_dentry->d_inode);
536 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_OPEN);
537 rc = ll_local_open(file, it, *och_p);
538 LASSERTF(rc == 0, "rc = %d\n", rc);
540 up(&lli->lli_och_sem);
543 * must do this outside lli_och_sem lock to prevent deadlock where
544 * different kind of OPEN lock for this same inode gets cancelled by
547 if (!S_ISREG(inode->i_mode))
552 if (file->f_flags & O_LOV_DELAY_CREATE ||
553 !(file->f_mode & FMODE_WRITE)) {
554 CDEBUG(D_INODE, "object creation was delayed\n");
558 file->f_flags &= ~O_LOV_DELAY_CREATE;
561 /* audit stuff if there was no RPC */
562 if (LUSTRE_IT(it)->it_data == 0) {
563 ll_audit_log(inode, AUDIT_OPEN, rc);
566 req = LUSTRE_IT(it)->it_data;
567 ll_intent_drop_lock(it);
568 ll_intent_release(it);
569 ptlrpc_req_finished(req);
571 ll_open_complete(inode);
575 OBD_FREE(*och_p, sizeof (struct obd_client_handle));
576 *och_p = NULL; /* OBD_FREE writes some magic there */
579 up(&lli->lli_och_sem);
585 /* Fills the obdo with the attributes for the inode defined by lsm */
586 int ll_lsm_getattr(struct obd_export *exp, struct lov_stripe_md *lsm,
589 struct ptlrpc_request_set *set;
593 LASSERT(lsm != NULL);
595 memset(oa, 0, sizeof *oa);
596 oa->o_id = lsm->lsm_object_id;
597 oa->o_gr = lsm->lsm_object_gr;
598 oa->o_mode = S_IFREG;
599 oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLSIZE |
600 OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ | OBD_MD_FLMTIME |
601 OBD_MD_FLCTIME | OBD_MD_FLGROUP;
603 set = ptlrpc_prep_set();
607 rc = obd_getattr_async(exp, oa, lsm, set);
609 rc = ptlrpc_set_wait(set);
610 ptlrpc_set_destroy(set);
615 oa->o_valid &= (OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ | OBD_MD_FLMTIME |
616 OBD_MD_FLCTIME | OBD_MD_FLSIZE);
620 static inline void ll_remove_suid(struct inode *inode)
624 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
625 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
627 /* was any of the uid bits set? */
628 mode &= inode->i_mode;
629 if (mode && !capable(CAP_FSETID)) {
630 inode->i_mode &= ~mode;
631 // XXX careful here - we cannot change the size
635 static int ll_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
637 struct ll_inode_info *lli = ll_i2info(inode);
638 struct lov_stripe_md *lsm = lli->lli_smd;
639 struct obd_export *exp = ll_i2dtexp(inode);
642 struct ldlm_lock *lock;
643 struct lov_stripe_md *lsm;
644 } key = { .name = "lock_to_stripe", .lock = lock, .lsm = lsm };
645 __u32 stripe, vallen = sizeof(stripe);
649 if (lsm->lsm_stripe_count == 1)
650 GOTO(check, stripe = 0);
652 /* get our offset in the lov */
653 rc = obd_get_info(exp, sizeof(key), &key, &vallen, &stripe);
655 CERROR("obd_get_info: rc = %d\n", rc);
658 LASSERT(stripe < lsm->lsm_stripe_count);
661 if (lsm->lsm_oinfo[stripe].loi_id != lock->l_resource->lr_name.name[0]||
662 lsm->lsm_oinfo[stripe].loi_gr != lock->l_resource->lr_name.name[2]){
663 LDLM_ERROR(lock, "resource doesn't match object "LPU64"/"LPU64
664 " inode=%lu/%u (%p)\n",
665 lsm->lsm_oinfo[stripe].loi_id,
666 lsm->lsm_oinfo[stripe].loi_gr,
667 inode->i_ino, inode->i_generation, inode);
668 return -ELDLM_NO_LOCK_DATA;
674 /* Flush the page cache for an extent as its canceled. When we're on an LOV,
675 * we get a lock cancellation for each stripe, so we have to map the obd's
676 * region back onto the stripes in the file that it held.
678 * No one can dirty the extent until we've finished our work and they can
679 * enqueue another lock. The DLM protects us from ll_file_read/write here,
680 * but other kernel actors could have pages locked.
682 * Called with the DLM lock held. */
683 void ll_pgcache_remove_extent(struct inode *inode, struct lov_stripe_md *lsm,
684 struct ldlm_lock *lock, __u32 stripe)
686 ldlm_policy_data_t tmpex;
687 unsigned long start, end, count, skip, i, j;
689 int rc, rc2, discard = lock->l_flags & LDLM_FL_DISCARD_DATA;
690 struct lustre_handle lockh;
693 memcpy(&tmpex, &lock->l_policy_data, sizeof(tmpex));
694 CDEBUG(D_INODE|D_PAGE, "inode %lu(%p) ["LPU64"->"LPU64"] size: %llu\n",
695 inode->i_ino, inode, tmpex.l_extent.start, tmpex.l_extent.end,
698 /* our locks are page granular thanks to osc_enqueue, we invalidate the
700 LASSERT((tmpex.l_extent.start & ~PAGE_CACHE_MASK) == 0);
701 LASSERT(((tmpex.l_extent.end + 1) & ~PAGE_CACHE_MASK) == 0);
705 start = tmpex.l_extent.start >> PAGE_CACHE_SHIFT;
706 end = tmpex.l_extent.end >> PAGE_CACHE_SHIFT;
707 if (lsm->lsm_stripe_count > 1) {
708 count = lsm->lsm_stripe_size >> PAGE_CACHE_SHIFT;
709 skip = (lsm->lsm_stripe_count - 1) * count;
710 start += start/count * skip + stripe * count;
712 end += end/count * skip + stripe * count;
714 if (end < tmpex.l_extent.end >> PAGE_CACHE_SHIFT)
717 i = inode->i_size ? (inode->i_size - 1) >> PAGE_CACHE_SHIFT : 0;
721 CDEBUG(D_INODE|D_PAGE, "walking page indices start: %lu j: %lu "
722 "count: %lu skip: %lu end: %lu%s\n", start, start % count,
723 count, skip, end, discard ? " (DISCARDING)" : "");
725 /* walk through the vmas on the inode and tear down mmaped pages that
726 * intersect with the lock. this stops immediately if there are no
727 * mmap()ed regions of the file. This is not efficient at all and
728 * should be short lived. We'll associate mmap()ed pages with the lock
729 * and will be able to find them directly */
731 for (i = start; i <= end; i += (j + skip)) {
732 j = min(count - (i % count), end - i + 1);
734 LASSERT(inode->i_mapping);
735 if (ll_teardown_mmaps(inode->i_mapping,
736 (__u64)i << PAGE_CACHE_SHIFT,
737 ((__u64)(i+j) << PAGE_CACHE_SHIFT) - 1) )
741 /* this is the simplistic implementation of page eviction at
742 * cancelation. It is careful to get races with other page
743 * lockers handled correctly. fixes from bug 20 will make it
744 * more efficient by associating locks with pages and with
745 * batching writeback under the lock explicitly. */
746 for (i = start, j = start % count; i <= end;
747 j++, i++, tmpex.l_extent.start += PAGE_CACHE_SIZE) {
749 CDEBUG(D_PAGE, "skip index %lu to %lu\n", i, i + skip);
755 LASSERTF(tmpex.l_extent.start< lock->l_policy_data.l_extent.end,
756 LPU64" >= "LPU64" start %lu i %lu end %lu\n",
757 tmpex.l_extent.start, lock->l_policy_data.l_extent.end,
760 if (!mapping_has_pages(inode->i_mapping)) {
761 CDEBUG(D_INODE|D_PAGE, "nothing left\n");
767 page = find_get_page(inode->i_mapping, i);
770 LL_CDEBUG_PAGE(D_PAGE, page, "lock page idx %lu ext "LPU64"\n",
771 i, tmpex.l_extent.start);
774 /* page->mapping to check with racing against teardown */
775 if (!discard && clear_page_dirty_for_io(page)) {
776 rc = ll_call_writepage(inode, page);
778 CERROR("writepage of page %p failed: %d\n",
780 /* either waiting for io to complete or reacquiring
781 * the lock that the failed writepage released */
785 tmpex.l_extent.end = tmpex.l_extent.start + PAGE_CACHE_SIZE - 1;
786 /* check to see if another DLM lock covers this page */
787 rc2 = ldlm_lock_match(lock->l_resource->lr_namespace,
788 LDLM_FL_BLOCK_GRANTED|LDLM_FL_CBPENDING |
790 &lock->l_resource->lr_name, LDLM_EXTENT,
791 &tmpex, LCK_PR | LCK_PW, &lockh);
792 if (rc2 == 0 && page->mapping != NULL) {
793 // checking again to account for writeback's lock_page()
794 LL_CDEBUG_PAGE(D_PAGE, page, "truncating\n");
795 ll_ra_accounting(page, inode->i_mapping);
796 ll_truncate_complete_page(page);
799 page_cache_release(page);
801 LASSERTF(tmpex.l_extent.start <=
802 (lock->l_policy_data.l_extent.end == ~0ULL ? ~0ULL :
803 lock->l_policy_data.l_extent.end + 1),
804 "loop too long "LPU64" > "LPU64" start %lu i %lu end %lu\n",
805 tmpex.l_extent.start, lock->l_policy_data.l_extent.end,
810 static int ll_extent_lock_callback(struct ldlm_lock *lock,
811 struct ldlm_lock_desc *new, void *data,
814 struct lustre_handle lockh = { 0 };
818 if ((unsigned long)data > 0 && (unsigned long)data < 0x1000) {
819 LDLM_ERROR(lock, "cancelling lock with bad data %p", data);
824 case LDLM_CB_BLOCKING:
825 ldlm_lock2handle(lock, &lockh);
826 rc = ldlm_cli_cancel(&lockh);
828 CERROR("ldlm_cli_cancel failed: %d\n", rc);
830 case LDLM_CB_CANCELING: {
832 struct ll_inode_info *lli;
833 struct lov_stripe_md *lsm;
837 /* This lock wasn't granted, don't try to evict pages */
838 if (lock->l_req_mode != lock->l_granted_mode)
841 inode = ll_inode_from_lock(lock);
844 lli = ll_i2info(inode);
847 if (lli->lli_smd == NULL)
851 stripe = ll_lock_to_stripe_offset(inode, lock);
853 CERROR("ll_lock_to_stripe_offset failed: %d\n", stripe);
857 ll_pgcache_remove_extent(inode, lsm, lock, stripe);
859 down(&lli->lli_size_sem);
860 lock_res_and_lock(lock);
861 kms = ldlm_extent_shift_kms(lock,
862 lsm->lsm_oinfo[stripe].loi_kms);
864 if (lsm->lsm_oinfo[stripe].loi_kms != kms)
865 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
866 lsm->lsm_oinfo[stripe].loi_kms, kms);
867 lsm->lsm_oinfo[stripe].loi_kms = kms;
868 unlock_res_and_lock(lock);
869 up(&lli->lli_size_sem);
870 //ll_try_done_writing(inode);
883 int ll_async_completion_ast(struct ldlm_lock *lock, int flags, void *data)
885 /* XXX ALLOCATE - 160 bytes */
886 struct inode *inode = ll_inode_from_lock(lock);
887 struct ll_inode_info *lli = ll_i2info(inode);
888 struct lustre_handle lockh = { 0 };
893 if (flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
894 LDLM_FL_BLOCK_CONV)) {
895 LBUG(); /* not expecting any blocked async locks yet */
896 LDLM_DEBUG(lock, "client-side async enqueue returned a blocked "
898 ldlm_lock_dump(D_OTHER, lock, 0);
899 ldlm_reprocess_all(lock->l_resource);
903 LDLM_DEBUG(lock, "client-side async enqueue: granted/glimpsed");
905 stripe = ll_lock_to_stripe_offset(inode, lock);
907 CERROR("ll_lock_to_stripe_offset failed: %d\n", stripe);
911 if (lock->l_lvb_len) {
912 struct lov_stripe_md *lsm = lli->lli_smd;
914 lvb = lock->l_lvb_data;
915 lsm->lsm_oinfo[stripe].loi_rss = lvb->lvb_size;
918 lock_res_and_lock(lock);
919 kms = MAX(lsm->lsm_oinfo[stripe].loi_kms, lvb->lvb_size);
920 kms = ldlm_extent_shift_kms(NULL, kms);
921 if (lsm->lsm_oinfo[stripe].loi_kms != kms)
922 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
923 lsm->lsm_oinfo[stripe].loi_kms, kms);
924 lsm->lsm_oinfo[stripe].loi_kms = kms;
925 unlock_res_and_lock(lock);
931 wake_up(&lock->l_waitq);
933 ldlm_lock2handle(lock, &lockh);
934 ldlm_lock_decref(&lockh, LCK_PR);
939 static int ll_glimpse_callback(struct ldlm_lock *lock, void *reqp)
941 struct ptlrpc_request *req = reqp;
942 struct inode *inode = ll_inode_from_lock(lock);
943 struct ll_inode_info *lli;
945 struct lov_stripe_md *lsm;
946 int rc, size = sizeof(*lvb), stripe;
950 GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
951 lli = ll_i2info(inode);
953 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
957 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
959 /* First, find out which stripe index this lock corresponds to. */
960 stripe = ll_lock_to_stripe_offset(inode, lock);
962 CERROR("ll_lock_to_stripe_offset failed: %d\n", stripe);
963 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
966 rc = lustre_pack_reply(req, 1, &size, NULL);
968 CERROR("lustre_pack_reply: %d\n", rc);
972 lvb = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*lvb));
973 lvb->lvb_size = lli->lli_smd->lsm_oinfo[stripe].loi_kms;
974 lvb->lvb_mtime = LTIME_S(inode->i_mtime);
975 lvb->lvb_atime = LTIME_S(inode->i_atime);
976 lvb->lvb_ctime = LTIME_S(inode->i_ctime);
978 LDLM_DEBUG(lock, "i_size: %llu -> stripe number %u -> kms "LPU64,
979 inode->i_size, stripe, lvb->lvb_size);
985 /* These errors are normal races, so we don't want to fill the console
986 * with messages by calling ptlrpc_error() */
987 if (rc == -ELDLM_NO_LOCK_DATA)
988 lustre_pack_reply(req, 0, NULL, NULL);
994 /* NB: lov_merge_size will prefer locally cached writes if they extend the
995 * file (because it prefers KMS over RSS when larger) */
996 int ll_glimpse_size(struct inode *inode)
998 struct ll_inode_info *lli = ll_i2info(inode);
999 struct ll_sb_info *sbi = ll_i2sbi(inode);
1000 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
1001 struct lustre_handle lockh = { 0 };
1002 int rc, flags = LDLM_FL_HAS_INTENT;
1005 CDEBUG(D_DLMTRACE, "Glimpsing inode %lu\n", inode->i_ino);
1007 rc = obd_enqueue(sbi->ll_dt_exp, lli->lli_smd, LDLM_EXTENT, &policy,
1008 LCK_PR, &flags, ll_extent_lock_callback,
1009 ldlm_completion_ast, ll_glimpse_callback, inode,
1010 sizeof(struct ost_lvb), lustre_swab_ost_lvb, &lockh);
1015 CERROR("obd_enqueue returned rc %d, returning -EIO\n", rc);
1016 RETURN(rc > 0 ? -EIO : rc);
1019 down(&lli->lli_size_sem);
1020 inode->i_size = lov_merge_size(lli->lli_smd, 0);
1021 inode->i_blocks = lov_merge_blocks(lli->lli_smd);
1022 up(&lli->lli_size_sem);
1024 LTIME_S(inode->i_mtime) = lov_merge_mtime(lli->lli_smd,
1025 LTIME_S(inode->i_mtime));
1027 CDEBUG(D_DLMTRACE, "glimpse: size: "LPU64", blocks: "LPU64"\n",
1028 (__u64)inode->i_size, (__u64)inode->i_blocks);
1030 obd_cancel(sbi->ll_dt_exp, lli->lli_smd, LCK_PR, &lockh);
1034 void ll_stime_record(struct ll_sb_info *sbi, struct timeval *start,
1035 struct obd_service_time *stime)
1037 struct timeval stop;
1038 do_gettimeofday(&stop);
1040 spin_lock(&sbi->ll_lock);
1041 lprocfs_stime_record(stime, &stop, start);
1042 spin_unlock(&sbi->ll_lock);
1045 int ll_extent_lock(struct ll_file_data *fd, struct inode *inode,
1046 struct lov_stripe_md *lsm, int mode,
1047 ldlm_policy_data_t *policy, struct lustre_handle *lockh,
1048 int ast_flags, struct obd_service_time *stime)
1050 struct ll_inode_info *lli = ll_i2info(inode);
1051 struct ll_sb_info *sbi = ll_i2sbi(inode);
1052 struct timeval start;
1056 LASSERT(lockh->cookie == 0);
1058 /* XXX phil: can we do this? won't it screw the file size up? */
1059 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
1060 (sbi->ll_flags & LL_SBI_NOLCK))
1063 CDEBUG(D_DLMTRACE, "Locking inode %lu, start "LPU64" end "LPU64"\n",
1064 inode->i_ino, policy->l_extent.start, policy->l_extent.end);
1066 do_gettimeofday(&start);
1067 rc = obd_enqueue(sbi->ll_dt_exp, lsm, LDLM_EXTENT, policy, mode,
1068 &ast_flags, ll_extent_lock_callback,
1069 ldlm_completion_ast, ll_glimpse_callback, inode,
1070 sizeof(struct ost_lvb), lustre_swab_ost_lvb, lockh);
1074 ll_stime_record(sbi, &start, stime);
1076 if (policy->l_extent.start == 0 &&
1077 policy->l_extent.end == OBD_OBJECT_EOF) {
1078 /* vmtruncate()->ll_truncate() first sets the i_size and then
1079 * the kms under both a DLM lock and the i_sem. If we don't
1080 * get the i_sem here we can match the DLM lock and reset
1081 * i_size from the kms before the truncating path has updated
1082 * the kms. generic_file_write can then trust the stale i_size
1083 * when doing appending writes and effectively cancel the
1084 * result of the truncate. Getting the i_sem after the enqueue
1085 * maintains the DLM -> i_sem acquiry order. */
1086 down(&lli->lli_size_sem);
1087 inode->i_size = lov_merge_size(lsm, 1);
1088 up(&lli->lli_size_sem);
1092 LTIME_S(inode->i_mtime) =
1093 lov_merge_mtime(lsm, LTIME_S(inode->i_mtime));
1099 int ll_extent_unlock(struct ll_file_data *fd, struct inode *inode,
1100 struct lov_stripe_md *lsm, int mode,
1101 struct lustre_handle *lockh)
1103 struct ll_sb_info *sbi = ll_i2sbi(inode);
1107 /* XXX phil: can we do this? won't it screw the file size up? */
1108 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
1109 (sbi->ll_flags & LL_SBI_NOLCK))
1112 rc = obd_cancel(sbi->ll_dt_exp, lsm, mode, lockh);
1117 static ssize_t ll_file_read(struct file *file, char *buf, size_t count,
1120 struct inode *inode = file->f_dentry->d_inode;
1121 struct ll_inode_info *lli = ll_i2info(inode);
1122 struct lov_stripe_md *lsm = lli->lli_smd;
1123 struct ll_lock_tree tree;
1124 struct ll_lock_tree_node *node;
1129 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1130 inode->i_ino, inode->i_generation, inode, count, *ppos);
1132 /* "If nbyte is 0, read() will return 0 and have no other results."
1133 * -- Single Unix Spec */
1137 lprocfs_counter_add(ll_i2sbi(inode)->ll_stats, LPROC_LL_READ_BYTES,
1143 node = ll_node_from_inode(inode, *ppos, *ppos + count - 1,
1146 tree.lt_fd = file->private_data;
1148 rc = ll_tree_lock(&tree, node, inode, buf, count,
1149 file->f_flags & O_NONBLOCK ? LDLM_FL_BLOCK_NOWAIT :0);
1153 down(&lli->lli_size_sem);
1154 kms = lov_merge_size(lsm, 1);
1155 if (*ppos + count - 1 > kms) {
1156 /* A glimpse is necessary to determine whether we return a short
1157 * read or some zeroes at the end of the buffer */
1158 up(&lli->lli_size_sem);
1159 retval = ll_glimpse_size(inode);
1163 inode->i_size = kms;
1164 up(&lli->lli_size_sem);
1167 CDEBUG(D_INFO, "Read ino %lu, "LPSZ" bytes, offset %lld, i_size %llu\n",
1168 inode->i_ino, count, *ppos, inode->i_size);
1170 /* turn off the kernel's read-ahead */
1171 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1174 file->f_ra.ra_pages = 0;
1176 retval = generic_file_read(file, buf, count, ppos);
1177 ll_audit_log(inode, AUDIT_READ, retval);
1180 ll_tree_unlock(&tree, inode);
1185 * Write to a file (through the page cache).
1187 static ssize_t ll_file_write(struct file *file, const char *buf,
1188 size_t count, loff_t *ppos)
1190 struct inode *inode = file->f_dentry->d_inode;
1191 loff_t maxbytes = ll_file_maxbytes(inode);
1192 struct ll_lock_tree tree;
1193 struct ll_lock_tree_node *node;
1198 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),size="LPSZ",offset=%Ld\n",
1199 inode->i_ino, inode->i_generation, inode, count, *ppos);
1201 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1203 /* POSIX, but surprised the VFS doesn't check this already */
1207 /* If file was opened for LL_IOC_LOV_SETSTRIPE but the ioctl wasn't
1208 * called on the file, don't fail the below assertion (bug 2388). */
1209 if (file->f_flags & O_LOV_DELAY_CREATE &&
1210 ll_i2info(inode)->lli_smd == NULL)
1213 LASSERT(ll_i2info(inode)->lli_smd != NULL);
1215 if (file->f_flags & O_APPEND)
1216 node = ll_node_from_inode(inode, 0, OBD_OBJECT_EOF, LCK_PW);
1218 node = ll_node_from_inode(inode, *ppos, *ppos + count - 1,
1222 RETURN(PTR_ERR(node));
1224 tree.lt_fd = file->private_data;
1226 rc = ll_tree_lock(&tree, node, inode, buf, count,
1227 file->f_flags & O_NONBLOCK ? LDLM_FL_BLOCK_NOWAIT :0);
1231 /* this is ok, g_f_w will overwrite this under i_sem if it races
1232 * with a local truncate, it just makes our maxbyte checking easier */
1233 if (file->f_flags & O_APPEND)
1234 *ppos = inode->i_size;
1236 if (*ppos >= maxbytes) {
1237 if (count || *ppos > maxbytes) {
1238 send_sig(SIGXFSZ, current, 0);
1239 GOTO(out, retval = -EFBIG);
1242 if (*ppos + count > maxbytes)
1243 count = maxbytes - *ppos;
1245 CDEBUG(D_INFO, "Writing inode %lu, "LPSZ" bytes, offset %Lu\n",
1246 inode->i_ino, count, *ppos);
1248 /* mark open handle dirty */
1249 set_bit(LLI_F_DIRTY_HANDLE, &(ll_i2info(inode)->lli_flags));
1251 /* generic_file_write handles O_APPEND after getting i_sem */
1252 retval = generic_file_write(file, buf, count, ppos);
1256 ll_audit_log(inode, AUDIT_WRITE, retval);
1258 ll_tree_unlock(&tree, inode);
1259 /* serialize with mmap/munmap/mremap */
1260 lprocfs_counter_add(ll_i2sbi(inode)->ll_stats, LPROC_LL_WRITE_BYTES,
1261 retval > 0 ? retval : 0);
1265 static int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
1266 int flags, struct lov_user_md *lum,
1269 struct lookup_intent oit = {.it_op = IT_OPEN, .it_flags = flags};
1270 struct ll_inode_info *lli = ll_i2info(inode);
1271 struct ptlrpc_request *req = NULL;
1272 struct obd_client_handle *och;
1273 struct lov_stripe_md *lsm;
1274 struct lustre_md md;
1280 if ((file->f_flags+1) & O_ACCMODE)
1282 if (file->f_flags & O_TRUNC)
1285 down(&lli->lli_open_sem);
1288 up(&lli->lli_open_sem);
1289 CDEBUG(D_IOCTL, "stripe already exists for ino %lu\n",
1294 f = get_empty_filp();
1298 f->f_dentry = file->f_dentry;
1299 f->f_vfsmnt = file->f_vfsmnt;
1302 rc = ll_intent_alloc(&oit);
1306 rc = ll_intent_file_open(f, lum, lum_size, &oit);
1309 if (it_disposition(&oit, DISP_LOOKUP_NEG))
1312 req = LUSTRE_IT(&oit)->it_data;
1313 rc = LUSTRE_IT(&oit)->it_status;
1318 rc = mdc_req2lustre_md(ll_i2mdexp(inode), req, 1,
1319 ll_i2dtexp(inode), &md);
1322 ll_update_inode(f->f_dentry->d_inode, &md);
1324 OBD_ALLOC(och, sizeof(struct obd_client_handle));
1326 GOTO(out, rc = -ENOMEM);
1328 /* actually ll_local_open() cannot fail! */
1329 rc = ll_local_open(f, &oit, och);
1333 if (LUSTRE_IT(&oit)->it_lock_mode) {
1334 ldlm_lock_decref_and_cancel((struct lustre_handle *)
1335 &LUSTRE_IT(&oit)->it_lock_handle,
1336 LUSTRE_IT(&oit)->it_lock_mode);
1337 LUSTRE_IT(&oit)->it_lock_mode = 0;
1340 ll_intent_release(&oit);
1342 /* ll_file_release() will decrease the count, but won't free anything
1343 * because we have at least one more reference coming from actual
1345 down(&lli->lli_och_sem);
1346 lli->lli_open_fd_write_count++;
1347 up(&lli->lli_och_sem);
1348 rc = ll_file_release(f->f_dentry->d_inode, f);
1350 /* Now also destroy our supplemental och */
1351 ll_md_och_close(ll_i2mdexp(inode), f->f_dentry->d_inode, och, 0);
1354 ll_intent_release(&oit);
1357 up(&lli->lli_open_sem);
1359 ptlrpc_req_finished(req);
1363 static int ll_lov_setea(struct inode *inode, struct file *file,
1366 int flags = MDS_OPEN_HAS_OBJS | FMODE_WRITE;
1367 int lum_size = sizeof(struct lov_user_md) +
1368 sizeof(struct lov_user_ost_data);
1369 struct lov_user_md *lump;
1373 if (!capable(CAP_SYS_ADMIN))
1376 OBD_ALLOC(lump, lum_size);
1380 rc = copy_from_user(lump, (struct lov_user_md *)arg, lum_size);
1382 GOTO(out_free_lump, rc = -EFAULT);
1384 rc = ll_lov_setstripe_ea_info(inode, file, flags, lump, lum_size);
1387 OBD_FREE(lump, lum_size);
1391 static int ll_lov_setstripe(struct inode *inode, struct file *file,
1394 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
1395 int rc, flags = FMODE_WRITE;
1398 /* Bug 1152: copy properly when this is no longer true */
1399 LASSERT(sizeof(lum) == sizeof(*lump));
1400 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lump->lmm_objects[0]));
1401 rc = copy_from_user(&lum, lump, sizeof(lum));
1405 rc = ll_lov_setstripe_ea_info(inode, file, flags, &lum, sizeof(lum));
1407 put_user(0, &lump->lmm_stripe_count);
1408 rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode),
1409 0, ll_i2info(inode)->lli_smd, lump);
1414 static int ll_lov_getstripe(struct inode *inode, unsigned long arg)
1416 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1421 return obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode), 0, lsm,
1425 static int ll_get_grouplock(struct inode *inode, struct file *file,
1428 struct ll_file_data *fd = file->private_data;
1429 ldlm_policy_data_t policy = { .l_extent = { .start = 0,
1430 .end = OBD_OBJECT_EOF}};
1431 struct lustre_handle lockh = { 0 };
1432 struct ll_inode_info *lli = ll_i2info(inode);
1433 struct lov_stripe_md *lsm = lli->lli_smd;
1437 if (fd->fd_flags & LL_FILE_GROUP_LOCKED) {
1441 policy.l_extent.gid = arg;
1442 if (file->f_flags & O_NONBLOCK)
1443 flags = LDLM_FL_BLOCK_NOWAIT;
1445 rc = ll_extent_lock(fd, inode, lsm, LCK_GROUP, &policy, &lockh, flags,
1446 &ll_i2sbi(inode)->ll_grouplock_stime);
1450 fd->fd_flags |= LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK;
1452 memcpy(&fd->fd_cwlockh, &lockh, sizeof(lockh));
1457 static int ll_put_grouplock(struct inode *inode, struct file *file,
1460 struct ll_file_data *fd = file->private_data;
1461 struct ll_inode_info *lli = ll_i2info(inode);
1462 struct lov_stripe_md *lsm = lli->lli_smd;
1466 if (!(fd->fd_flags & LL_FILE_GROUP_LOCKED)) {
1467 /* Ugh, it's already unlocked. */
1471 if (fd->fd_gid != arg) /* Ugh? Unlocking with different gid? */
1474 fd->fd_flags &= ~(LL_FILE_GROUP_LOCKED|LL_FILE_IGNORE_LOCK);
1476 rc = ll_extent_unlock(fd, inode, lsm, LCK_GROUP, &fd->fd_cwlockh);
1481 memset(&fd->fd_cwlockh, 0, sizeof(fd->fd_cwlockh));
1486 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1489 struct ll_file_data *fd = file->private_data;
1490 struct ll_sb_info *sbi = ll_i2sbi(inode);
1494 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),cmd=%x\n", inode->i_ino,
1495 inode->i_generation, inode, cmd);
1497 if (_IOC_TYPE(cmd) == 'T') /* tty ioctls */
1500 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
1502 case LL_IOC_GETFLAGS:
1503 /* Get the current value of the file flags */
1504 return put_user(fd->fd_flags, (int *)arg);
1505 case LL_IOC_SETFLAGS:
1506 case LL_IOC_CLRFLAGS:
1507 /* Set or clear specific file flags */
1508 /* XXX This probably needs checks to ensure the flags are
1509 * not abused, and to handle any flag side effects.
1511 if (get_user(flags, (int *) arg))
1514 if (cmd == LL_IOC_SETFLAGS)
1515 fd->fd_flags |= flags;
1517 fd->fd_flags &= ~flags;
1519 case LL_IOC_LOV_SETSTRIPE:
1520 RETURN(ll_lov_setstripe(inode, file, arg));
1521 case LL_IOC_LOV_SETEA:
1522 RETURN(ll_lov_setea(inode, file, arg));
1523 case IOC_MDC_SHOWFID: {
1524 struct lustre_id *idp = (struct lustre_id *)arg;
1525 struct lustre_id id;
1529 filename = getname((const char *)arg);
1530 if (IS_ERR(filename))
1531 RETURN(PTR_ERR(filename));
1533 ll_inode2id(&id, inode);
1535 rc = ll_get_fid(sbi->ll_md_exp, &id, filename, &id);
1537 GOTO(out_filename, rc);
1539 rc = copy_to_user(idp, &id, sizeof(*idp));
1541 GOTO(out_filename, rc = -EFAULT);
1548 case LL_IOC_KEY_TYPE: {
1549 struct obd_ioctl_data *data;
1552 int typelen, rc, len = 0;
1554 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1559 type = data->ioc_inlbuf1;
1560 typelen = data->ioc_inllen1;
1563 CDEBUG(D_INFO, "LL_IOC_KEY_TYPE missing filename\n");
1564 GOTO(out, rc = -EINVAL);
1566 ll_set_sb_gksinfo(inode->i_sb, type);
1569 obd_ioctl_freedata(buf, len);
1573 case LL_IOC_LOV_GETSTRIPE:
1574 RETURN(ll_lov_getstripe(inode, arg));
1575 case EXT3_IOC_GETFLAGS:
1576 case EXT3_IOC_SETFLAGS:
1577 RETURN( ll_iocontrol(inode, file, cmd, arg) );
1578 case LL_IOC_GROUP_LOCK:
1579 RETURN(ll_get_grouplock(inode, file, arg));
1580 case LL_IOC_GROUP_UNLOCK:
1581 RETURN(ll_put_grouplock(inode, file, arg));
1582 case EXT3_IOC_GETVERSION_OLD:
1583 case EXT3_IOC_GETVERSION:
1584 return put_user(inode->i_generation, (int *) arg);
1585 /* We need to special case any other ioctls we want to handle,
1586 * to send them to the MDS/OST as appropriate and to properly
1587 * network encode the arg field.
1588 case EXT2_IOC_GETVERSION_OLD:
1589 case EXT2_IOC_GETVERSION_NEW:
1590 case EXT2_IOC_SETVERSION_OLD:
1591 case EXT2_IOC_SETVERSION_NEW:
1592 case EXT3_IOC_SETVERSION_OLD:
1593 case EXT3_IOC_SETVERSION:
1595 case LL_IOC_FLUSH_CRED:
1596 RETURN(ll_flush_cred(inode));
1598 RETURN(ll_set_audit(inode, arg));
1600 RETURN( obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
1605 loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
1607 struct inode *inode = file->f_dentry->d_inode;
1608 struct ll_file_data *fd = file->private_data;
1609 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1610 struct lustre_handle lockh = {0};
1613 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),to=%llu\n", inode->i_ino,
1614 inode->i_generation, inode,
1615 offset + ((origin==2) ? inode->i_size : file->f_pos));
1617 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_LLSEEK);
1618 if (origin == 2) { /* SEEK_END */
1619 ldlm_policy_data_t policy = { .l_extent = {0, OBD_OBJECT_EOF }};
1620 struct ll_inode_info *lli = ll_i2info(inode);
1621 int nonblock = 0, rc;
1623 if (file->f_flags & O_NONBLOCK)
1624 nonblock = LDLM_FL_BLOCK_NOWAIT;
1626 rc = ll_extent_lock(fd, inode, lsm, LCK_PR, &policy, &lockh,
1627 nonblock, &ll_i2sbi(inode)->ll_seek_stime);
1631 down(&lli->lli_size_sem);
1632 offset += inode->i_size;
1633 up(&lli->lli_size_sem);
1634 } else if (origin == 1) { /* SEEK_CUR */
1635 offset += file->f_pos;
1639 if (offset >= 0 && offset <= ll_file_maxbytes(inode)) {
1640 if (offset != file->f_pos) {
1641 file->f_pos = offset;
1642 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1644 file->f_version = ++event;
1651 ll_extent_unlock(fd, inode, lsm, LCK_PR, &lockh);
1655 int ll_fsync(struct file *file, struct dentry *dentry, int data)
1657 struct inode *inode = dentry->d_inode;
1658 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1659 struct lustre_id id;
1660 struct ptlrpc_request *req;
1663 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1664 inode->i_generation, inode);
1666 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_FSYNC);
1668 /* fsync's caller has already called _fdata{sync,write}, we want
1669 * that IO to finish before calling the osc and mdc sync methods */
1670 rc = filemap_fdatawait(inode->i_mapping);
1672 ll_inode2id(&id, inode);
1673 err = md_sync(ll_i2sbi(inode)->ll_md_exp, &id, &req);
1677 ptlrpc_req_finished(req);
1680 struct obdo *oa = obdo_alloc();
1683 RETURN(rc ? rc : -ENOMEM);
1685 oa->o_id = lsm->lsm_object_id;
1686 oa->o_gr = lsm->lsm_object_gr;
1687 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1689 obdo_from_inode(oa, inode, (OBD_MD_FLTYPE | OBD_MD_FLATIME |
1690 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1693 err = obd_sync(ll_i2sbi(inode)->ll_dt_exp, oa, lsm,
1703 int ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
1705 struct inode *inode = file->f_dentry->d_inode;
1706 struct ll_inode_info *li = ll_i2info(inode);
1707 struct ll_sb_info *sbi = ll_i2sbi(inode);
1708 struct obd_device *obddev;
1709 struct ldlm_res_id res_id =
1710 { .name = {id_fid(&li->lli_id), id_group(&li->lli_id), LDLM_FLOCK} };
1711 struct lustre_handle lockh = {0};
1712 ldlm_policy_data_t flock;
1713 ldlm_mode_t mode = 0;
1718 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu file_lock=%p\n",
1719 inode->i_ino, file_lock);
1721 flock.l_flock.pid = file_lock->fl_pid;
1722 flock.l_flock.start = file_lock->fl_start;
1723 flock.l_flock.end = file_lock->fl_end;
1725 switch (file_lock->fl_type) {
1730 /* An unlock request may or may not have any relation to
1731 * existing locks so we may not be able to pass a lock handle
1732 * via a normal ldlm_lock_cancel() request. The request may even
1733 * unlock a byte range in the middle of an existing lock. In
1734 * order to process an unlock request we need all of the same
1735 * information that is given with a normal read or write record
1736 * lock request. To avoid creating another ldlm unlock (cancel)
1737 * message we'll treat a LCK_NL flock request as an unlock. */
1744 CERROR("unknown fcntl lock type: %d\n", file_lock->fl_type);
1759 flags = LDLM_FL_BLOCK_NOWAIT;
1765 flags = LDLM_FL_TEST_LOCK;
1766 /* Save the old mode so that if the mode in the lock changes we
1767 * can decrement the appropriate reader or writer refcount. */
1768 file_lock->fl_type = mode;
1771 CERROR("unknown fcntl lock command: %d\n", cmd);
1775 CDEBUG(D_DLMTRACE, "inode=%lu, pid="LPU64", flags=%#x, mode=%u, "
1776 "start="LPU64", end="LPU64"\n", inode->i_ino, flock.l_flock.pid,
1777 flags, mode, flock.l_flock.start, flock.l_flock.end);
1779 obddev = md_get_real_obd(sbi->ll_md_exp, &li->lli_id);
1780 rc = ldlm_cli_enqueue(obddev->obd_self_export, NULL,
1781 obddev->obd_namespace,
1782 res_id, LDLM_FLOCK, &flock, mode, &flags,
1783 NULL, ldlm_flock_completion_ast, NULL, file_lock,
1784 NULL, 0, NULL, &lockh);
1788 int ll_inode_revalidate_it(struct dentry *dentry)
1790 struct lookup_intent oit = { .it_op = IT_GETATTR };
1791 struct inode *inode = dentry->d_inode;
1792 struct ptlrpc_request *req = NULL;
1793 struct ll_inode_info *lli;
1794 struct lov_stripe_md *lsm;
1795 struct ll_sb_info *sbi;
1796 struct lustre_id id;
1801 CERROR("REPORT THIS LINE TO PETER\n");
1805 sbi = ll_i2sbi(inode);
1807 ll_inode2id(&id, inode);
1808 lli = ll_i2info(inode);
1809 LASSERT(id_fid(&id) != 0);
1811 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), name=%s(%p)\n",
1812 inode->i_ino, inode->i_generation, inode, dentry->d_name.name,
1815 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,5,0))
1816 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_REVALIDATE);
1819 rc = ll_intent_alloc(&oit);
1823 rc = ll_crypto_init_it_key(inode, &oit);
1827 rc = md_intent_lock(sbi->ll_md_exp, &id, NULL, 0, NULL, 0, &id,
1828 &oit, 0, &req, ll_mdc_blocking_ast);
1832 rc = revalidate_it_finish(req, 1, &oit, dentry);
1837 ll_lookup_finish_locks(&oit, dentry);
1839 if (!LLI_HAVE_FLSIZE(inode)) {
1840 /* if object not yet allocated, don't validate size */
1843 /* ll_glimpse_size() will prefer locally cached
1844 * writes if they extend the file */
1845 rc = ll_glimpse_size(inode);
1850 ll_intent_release(&oit);
1852 ptlrpc_req_finished(req);
1856 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1857 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
1860 struct inode *inode = de->d_inode;
1861 struct ll_inode_info *lli = ll_i2info(inode);
1863 res = ll_inode_revalidate_it(de);
1864 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_GETATTR);
1869 stat->ino = inode->i_ino;
1870 stat->mode = inode->i_mode;
1871 stat->nlink = inode->i_nlink;
1872 stat->uid = inode->i_uid;
1873 stat->gid = inode->i_gid;
1874 stat->atime = inode->i_atime;
1875 stat->mtime = inode->i_mtime;
1876 stat->ctime = inode->i_ctime;
1877 stat->blksize = inode->i_blksize;
1879 down(&lli->lli_size_sem);
1880 stat->size = inode->i_size;
1881 stat->blocks = inode->i_blocks;
1882 up(&lli->lli_size_sem);
1884 stat->rdev = kdev_t_to_nr(inode->i_rdev);
1885 stat->dev = id_group(&ll_i2info(inode)->lli_id);
1891 int ll_setxattr_internal(struct inode *inode, const char *name,
1892 const void *value, size_t size, int flags,
1895 struct ll_sb_info *sbi = ll_i2sbi(inode);
1896 struct ptlrpc_request *request = NULL;
1897 struct mdc_op_data *op_data;
1900 int rc = 0, key_size = 0;
1903 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu\n", inode->i_ino);
1904 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_SETXATTR);
1906 if (sbi->ll_remote && !strcmp(name, XATTR_NAME_ACL_ACCESS))
1907 RETURN(-EOPNOTSUPP);
1909 memset(&attr, 0x0, sizeof(attr));
1910 attr.ia_valid |= valid;
1911 attr.ia_attr_flags = flags;
1913 if (strcmp(name, XATTR_NAME_ACL_ACCESS) == 0) {
1914 rc = ll_crypto_get_mac(inode, &attr, (void *)value, size,
1917 CERROR("can not get right mac, rc=%d\n", rc);
1922 OBD_ALLOC(op_data, sizeof(*op_data));
1926 ll_inode2mdc_data(op_data, inode, (OBD_MD_FLID | OBD_MD_MEA));
1928 rc = md_setattr(sbi->ll_md_exp, op_data, &attr,
1929 (void *)name, strnlen(name, XATTR_NAME_MAX) + 1,
1930 (void *)value, size, key, key_size, &request);
1931 OBD_FREE(op_data, sizeof(*op_data));
1934 CDEBUG(D_SEC, "md_setattr fails: rc = %d\n", rc);
1938 if (key && key_size)
1939 OBD_FREE(key, key_size);
1940 ptlrpc_req_finished(request);
1944 int ll_setxattr(struct dentry *dentry, const char *name, const void *value,
1945 size_t size, int flags)
1948 struct posix_acl *acl;
1949 struct ll_inode_info *lli;
1952 rc = ll_setxattr_internal(dentry->d_inode, name, value, size,
1955 /* update inode's acl info */
1956 if (rc == 0 && strcmp(name, XATTR_NAME_ACL_ACCESS) == 0) {
1958 acl = posix_acl_from_xattr(value, size);
1960 CERROR("convert from xattr to acl error: %ld",
1964 error = posix_acl_valid(acl);
1966 CERROR("acl valid error: %d", error);
1967 posix_acl_release(acl);
1975 lli = ll_i2info(dentry->d_inode);
1976 spin_lock(&lli->lli_lock);
1977 if (lli->lli_posix_acl != NULL)
1978 posix_acl_release(lli->lli_posix_acl);
1979 lli->lli_posix_acl = acl;
1980 spin_unlock(&lli->lli_lock);
1987 int ll_removexattr(struct dentry *dentry, const char *name)
1989 return ll_setxattr_internal(dentry->d_inode, name, NULL, 0, 0,
1993 int ll_getxattr_internal(struct inode *inode, const char *name,
1994 void *value, size_t size, __u64 valid)
1996 struct ptlrpc_request *request = NULL;
1997 struct ll_sb_info *sbi = ll_i2sbi(inode);
1998 struct lustre_id id;
1999 struct mds_body *body;
2004 lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_GETXATTR);
2006 if (sbi->ll_remote && !strcmp(name, XATTR_NAME_ACL_ACCESS))
2007 RETURN(-EOPNOTSUPP);
2009 ll_inode2id(&id, inode);
2010 rc = md_getattr(sbi->ll_md_exp, &id, valid, name, NULL, 0,
2011 size, NULL, &request);
2013 if (rc != -ENODATA && rc != -EOPNOTSUPP)
2014 CERROR("rc = %d\n", rc);
2018 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
2019 LASSERT(body != NULL);
2020 LASSERT_REPSWABBED(request, 0);
2022 ea_size = body->eadatasize;
2024 GOTO(out, rc = ea_size);
2026 LASSERT(ea_size <= request->rq_repmsg->buflens[1]);
2027 ea_data = lustre_msg_buf(request->rq_repmsg, 1, ea_size);
2028 LASSERT(ea_data != NULL);
2029 LASSERT_REPSWABBED(request, 1);
2032 memcpy(value, ea_data, ea_size);
2036 ptlrpc_req_finished(request);
2040 int ll_getxattr(struct dentry *dentry, const char *name, void *value,
2043 return ll_getxattr_internal(dentry->d_inode, name,
2044 value, size, OBD_MD_FLXATTR);
2047 int ll_listxattr(struct dentry *dentry, char *list, size_t size)
2049 return ll_getxattr_internal(dentry->d_inode, NULL, list, size,
2050 OBD_MD_FLXATTRLIST);
2054 * Here we hold DLM lock across permission check, to get better
2055 * conformance especially for remote acl. will introduce certain
2056 * overhead, maybe need a profile.
2059 lustre_check_acl(struct inode *inode, int mask)
2061 struct lookup_intent it = { .it_op = IT_GETATTR };
2062 struct dentry de = { .d_inode = inode };
2063 struct ll_sb_info *sbi;
2064 struct lustre_id id;
2065 struct ptlrpc_request *req = NULL;
2066 struct ll_inode_info *lli = ll_i2info(inode);
2067 struct posix_acl *acl;
2071 sbi = ll_i2sbi(inode);
2072 ll_inode2id(&id, inode);
2074 if (ll_intent_alloc(&it))
2077 rc = md_intent_lock(sbi->ll_md_exp, &id, NULL, 0, NULL, 0, &id,
2078 &it, 0, &req, ll_mdc_blocking_ast);
2080 ll_intent_free(&it);
2084 rc = revalidate_it_finish(req, 1, &it, &de);
2086 ll_intent_release(&it);
2090 if (sbi->ll_remote) {
2091 rc = ll_remote_acl_permission(inode, mask);
2093 spin_lock(&lli->lli_lock);
2094 acl = posix_acl_dup(ll_i2info(inode)->lli_posix_acl);
2095 spin_unlock(&lli->lli_lock);
2100 rc = posix_acl_permission(inode, acl, mask);
2101 posix_acl_release(acl);
2105 ll_lookup_finish_locks(&it, &de);
2106 ll_intent_free(&it);
2110 ptlrpc_req_finished(req);
2115 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
2117 struct ll_sb_info *sbi = ll_i2sbi(inode);
2119 /* for remote client, permission bits in inode doesn't
2120 * play a role anymore.
2123 return lustre_check_acl(inode, mask);
2125 return generic_permission(inode, mask, lustre_check_acl);
2128 struct file_operations ll_file_operations = {
2129 .read = ll_file_read,
2130 .write = ll_file_write,
2131 .ioctl = ll_file_ioctl,
2132 .open = ll_file_open,
2133 .release = ll_file_release,
2134 .mmap = ll_file_mmap,
2135 .llseek = ll_file_seek,
2136 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
2137 .sendfile = generic_file_sendfile,
2140 .lock = ll_file_flock
2143 struct inode_operations ll_file_inode_operations = {
2144 .setattr = ll_setattr,
2145 .truncate = ll_truncate,
2146 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
2147 .getattr = ll_getattr,
2149 .revalidate_it = ll_inode_revalidate_it,
2151 .setxattr = ll_setxattr,
2152 .getxattr = ll_getxattr,
2153 .listxattr = ll_listxattr,
2154 .removexattr = ll_removexattr,
2155 .permission = ll_inode_permission,