1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Lustre Light block IO
6 * Copyright (c) 2002-2004 Cluster File Systems, Inc.
8 * This file is part of Lustre, http://www.lustre.org.
10 * Lustre is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Lustre is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Lustre; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #define DEBUG_SUBSYSTEM S_LLITE
30 #include <sys/types.h>
32 #include <sys/queue.h>
49 #include "llite_lib.h"
53 struct obd_io_group *lig_oig;
54 struct inode *lig_inode;
55 struct lustre_rw_params *lig_params;
59 struct ll_async_page *lig_llaps;
60 struct page *lig_pages;
61 void *lig_llap_cookies;
64 #define LLU_IO_GROUP_SIZE(x) \
65 (sizeof(struct llu_io_group) + \
66 (sizeof(struct ll_async_page) + \
67 sizeof(struct page) + \
68 llap_cookie_size) * (x))
72 struct inode *lis_inode;
76 struct llu_io_group *lis_groups[0];
78 #define LLU_IO_SESSION_SIZE(x) \
79 (sizeof(struct llu_io_session) + (x) * 2 * sizeof(void *))
82 typedef ssize_t llu_file_piov_t(const struct iovec *iovec, int iovlen,
83 _SYSIO_OFF_T pos, ssize_t len,
86 size_t llap_cookie_size;
88 static int llu_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
90 struct llu_inode_info *lli = llu_i2info(inode);
91 struct lov_stripe_md *lsm = lli->lli_smd;
92 struct obd_export *exp = llu_i2obdexp(inode);
95 struct ldlm_lock *lock;
96 struct lov_stripe_md *lsm;
97 } key = { .name = "lock_to_stripe", .lock = lock, .lsm = lsm };
98 __u32 stripe, vallen = sizeof(stripe);
102 if (lsm->lsm_stripe_count == 1)
105 /* get our offset in the lov */
106 rc = obd_get_info(exp, sizeof(key), &key, &vallen, &stripe);
108 CERROR("obd_get_info: rc = %d\n", rc);
111 LASSERT(stripe < lsm->lsm_stripe_count);
115 static int llu_extent_lock_callback(struct ldlm_lock *lock,
116 struct ldlm_lock_desc *new, void *data,
119 struct lustre_handle lockh = { 0 };
123 if ((unsigned long)data > 0 && (unsigned long)data < 0x1000) {
124 LDLM_ERROR(lock, "cancelling lock with bad data %p", data);
129 case LDLM_CB_BLOCKING:
130 ldlm_lock2handle(lock, &lockh);
131 rc = ldlm_cli_cancel(&lockh);
133 CERROR("ldlm_cli_cancel failed: %d\n", rc);
135 case LDLM_CB_CANCELING: {
137 struct llu_inode_info *lli;
138 struct lov_stripe_md *lsm;
142 /* This lock wasn't granted, don't try to evict pages */
143 if (lock->l_req_mode != lock->l_granted_mode)
146 inode = llu_inode_from_lock(lock);
149 lli= llu_i2info(inode);
156 stripe = llu_lock_to_stripe_offset(inode, lock);
157 lock_res_and_lock(lock);
158 kms = ldlm_extent_shift_kms(lock,
159 lsm->lsm_oinfo[stripe]->loi_kms);
160 unlock_res_and_lock(lock);
161 if (lsm->lsm_oinfo[stripe]->loi_kms != kms)
162 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
163 lsm->lsm_oinfo[stripe]->loi_kms, kms);
164 lsm->lsm_oinfo[stripe]->loi_kms = kms;
176 static int llu_glimpse_callback(struct ldlm_lock *lock, void *reqp)
178 struct ptlrpc_request *req = reqp;
179 struct inode *inode = llu_inode_from_lock(lock);
180 struct llu_inode_info *lli;
182 int size[2] = { sizeof(struct ptlrpc_body), sizeof(*lvb) };
187 GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
188 lli = llu_i2info(inode);
190 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
191 if (lli->lli_smd == NULL)
192 GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
194 /* First, find out which stripe index this lock corresponds to. */
195 if (lli->lli_smd->lsm_stripe_count > 1)
196 stripe = llu_lock_to_stripe_offset(inode, lock);
198 rc = lustre_pack_reply(req, 2, size, NULL);
200 CERROR("lustre_pack_reply: %d\n", rc);
204 lvb = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*lvb));
205 lvb->lvb_size = lli->lli_smd->lsm_oinfo[stripe]->loi_kms;
207 LDLM_DEBUG(lock, "i_size: %llu -> stripe number %u -> kms "LPU64,
208 (__u64)llu_i2stat(inode)->st_size, stripe,lvb->lvb_size);
212 /* These errors are normal races, so we don't want to fill the console
213 * with messages by calling ptlrpc_error() */
214 if (rc == -ELDLM_NO_LOCK_DATA)
215 lustre_pack_reply(req, 1, NULL, NULL);
221 static void llu_merge_lvb(struct inode *inode)
223 struct llu_inode_info *lli = llu_i2info(inode);
224 struct llu_sb_info *sbi = llu_i2sbi(inode);
225 struct intnl_stat *st = llu_i2stat(inode);
229 inode_init_lvb(inode, &lvb);
230 obd_merge_lvb(sbi->ll_dt_exp, lli->lli_smd, &lvb, 0);
231 st->st_size = lvb.lvb_size;
232 st->st_blocks = lvb.lvb_blocks;
233 st->st_mtime = lvb.lvb_mtime;
234 st->st_atime = lvb.lvb_atime;
235 st->st_ctime = lvb.lvb_ctime;
239 int llu_local_size(struct inode *inode)
241 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
242 struct llu_inode_info *lli = llu_i2info(inode);
243 struct llu_sb_info *sbi = llu_i2sbi(inode);
244 struct lustre_handle lockh = { 0 };
249 if (lli->lli_smd->lsm_stripe_count == 0)
252 rc = obd_match(sbi->ll_dt_exp, lli->lli_smd, LDLM_EXTENT,
253 &policy, LCK_PR | LCK_PW, &flags, inode, &lockh);
259 llu_merge_lvb(inode);
260 obd_cancel(sbi->ll_dt_exp, lli->lli_smd, LCK_PR, &lockh);
264 /* NB: lov_merge_size will prefer locally cached writes if they extend the
265 * file (because it prefers KMS over RSS when larger) */
266 int llu_glimpse_size(struct inode *inode)
268 struct llu_inode_info *lli = llu_i2info(inode);
269 struct intnl_stat *st = llu_i2stat(inode);
270 struct llu_sb_info *sbi = llu_i2sbi(inode);
271 struct lustre_handle lockh = { 0 };
272 struct ldlm_enqueue_info einfo = { 0 };
273 struct obd_info oinfo = { { { 0 } } };
277 /* If size is cached on the mds, skip glimpse. */
278 if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
281 CDEBUG(D_DLMTRACE, "Glimpsing inode "LPU64"\n", (__u64)st->st_ino);
284 CDEBUG(D_DLMTRACE, "No objects for inode "LPU64"\n",
289 einfo.ei_type = LDLM_EXTENT;
290 einfo.ei_mode = LCK_PR;
291 einfo.ei_cb_bl = llu_extent_lock_callback;
292 einfo.ei_cb_cp = ldlm_completion_ast;
293 einfo.ei_cb_gl = llu_glimpse_callback;
294 einfo.ei_cbdata = inode;
296 oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
297 oinfo.oi_lockh = &lockh;
298 oinfo.oi_md = lli->lli_smd;
299 oinfo.oi_flags = LDLM_FL_HAS_INTENT;
301 rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
303 CERROR("obd_enqueue returned rc %d, returning -EIO\n", rc);
304 RETURN(rc > 0 ? -EIO : rc);
307 llu_merge_lvb(inode);
308 CDEBUG(D_DLMTRACE, "glimpse: size: "LPU64", blocks: "LPU64"\n",
309 (__u64)st->st_size, (__u64)st->st_blocks);
314 int llu_extent_lock(struct ll_file_data *fd, struct inode *inode,
315 struct lov_stripe_md *lsm, int mode,
316 ldlm_policy_data_t *policy, struct lustre_handle *lockh,
319 struct llu_sb_info *sbi = llu_i2sbi(inode);
320 struct intnl_stat *st = llu_i2stat(inode);
321 struct ldlm_enqueue_info einfo = { 0 };
322 struct obd_info oinfo = { { { 0 } } };
327 LASSERT(!lustre_handle_is_used(lockh));
328 CLASSERT(ELDLM_OK == 0);
330 /* XXX phil: can we do this? won't it screw the file size up? */
331 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
332 (sbi->ll_flags & LL_SBI_NOLCK) || mode == LCK_NL)
335 CDEBUG(D_DLMTRACE, "Locking inode %llu, start "LPU64" end "LPU64"\n",
336 (__u64)st->st_ino, policy->l_extent.start,
337 policy->l_extent.end);
339 einfo.ei_type = LDLM_EXTENT;
340 einfo.ei_mode = mode;
341 einfo.ei_cb_bl = llu_extent_lock_callback;
342 einfo.ei_cb_cp = ldlm_completion_ast;
343 einfo.ei_cb_gl = llu_glimpse_callback;
344 einfo.ei_cbdata = inode;
346 oinfo.oi_policy = *policy;
347 oinfo.oi_lockh = lockh;
349 oinfo.oi_flags = ast_flags;
351 rc = obd_enqueue(sbi->ll_dt_exp, &oinfo, &einfo, NULL);
352 *policy = oinfo.oi_policy;
356 inode_init_lvb(inode, &lvb);
357 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
358 if (policy->l_extent.start == 0 &&
359 policy->l_extent.end == OBD_OBJECT_EOF)
360 st->st_size = lvb.lvb_size;
363 st->st_mtime = lvb.lvb_mtime;
364 st->st_atime = lvb.lvb_atime;
365 st->st_ctime = lvb.lvb_ctime;
371 int llu_extent_unlock(struct ll_file_data *fd, struct inode *inode,
372 struct lov_stripe_md *lsm, int mode,
373 struct lustre_handle *lockh)
375 struct llu_sb_info *sbi = llu_i2sbi(inode);
379 CLASSERT(ELDLM_OK == 0);
381 /* XXX phil: can we do this? won't it screw the file size up? */
382 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
383 (sbi->ll_flags & LL_SBI_NOLCK) || mode == LCK_NL)
386 rc = obd_cancel(sbi->ll_dt_exp, lsm, mode, lockh);
391 #define LLAP_MAGIC 12346789
393 struct ll_async_page {
397 struct page *llap_page;
398 struct inode *llap_inode;
401 static void llu_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
403 struct ll_async_page *llap;
405 struct lov_stripe_md *lsm;
406 obd_flag valid_flags;
409 llap = LLAP_FROM_COOKIE(data);
410 inode = llap->llap_inode;
411 lsm = llu_i2info(inode)->lli_smd;
413 oa->o_id = lsm->lsm_object_id;
414 oa->o_valid = OBD_MD_FLID;
415 valid_flags = OBD_MD_FLTYPE | OBD_MD_FLATIME;
416 if (cmd & OBD_BRW_WRITE)
417 valid_flags |= OBD_MD_FLMTIME | OBD_MD_FLCTIME |
418 OBD_MD_FLUID | OBD_MD_FLGID |
419 OBD_MD_FLFID | OBD_MD_FLGENER;
421 obdo_from_inode(oa, inode, valid_flags);
425 static void llu_ap_update_obdo(void *data, int cmd, struct obdo *oa,
428 struct ll_async_page *llap;
431 llap = LLAP_FROM_COOKIE(data);
432 obdo_from_inode(oa, llap->llap_inode, valid);
437 /* called for each page in a completed rpc.*/
438 static int llu_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
440 struct ll_async_page *llap;
444 llap = LLAP_FROM_COOKIE(data);
445 llap->llap_queued = 0;
446 page = llap->llap_page;
449 if (cmd & OBD_BRW_WRITE)
450 CERROR("writeback error on page %p index %ld: %d\n",
451 page, page->index, rc);
456 static struct obd_async_page_ops llu_async_page_ops = {
457 .ap_make_ready = NULL,
458 .ap_refresh_count = NULL,
459 .ap_fill_obdo = llu_ap_fill_obdo,
460 .ap_update_obdo = llu_ap_update_obdo,
461 .ap_completion = llu_ap_completion,
464 static int llu_queue_pio(int cmd, struct llu_io_group *group,
465 char *buf, size_t count, loff_t pos)
467 struct llu_inode_info *lli = llu_i2info(group->lig_inode);
468 struct intnl_stat *st = llu_i2stat(group->lig_inode);
469 struct lov_stripe_md *lsm = lli->lli_smd;
470 struct obd_export *exp = llu_i2obdexp(group->lig_inode);
471 struct page *pages = &group->lig_pages[group->lig_npages],*page = pages;
472 struct ll_async_page *llap = &group->lig_llaps[group->lig_npages];
473 void *llap_cookie = group->lig_llap_cookies +
474 llap_cookie_size * group->lig_npages;
475 int i, rc, npages = 0, ret_bytes = 0;
482 local_lock = group->lig_params->lrp_lock_mode != LCK_NL;
483 /* prepare the pages array */
485 unsigned long index, offset, bytes;
487 offset = (pos & ~CFS_PAGE_MASK);
488 index = pos >> CFS_PAGE_SHIFT;
489 bytes = CFS_PAGE_SIZE - offset;
493 /* prevent read beyond file range */
494 if (/* local_lock && */
495 cmd == OBD_BRW_READ && pos + bytes >= st->st_size) {
496 if (pos >= st->st_size)
498 bytes = st->st_size - pos;
501 /* prepare page for this index */
503 page->addr = buf - offset;
505 page->_offset = offset;
506 page->_count = bytes;
514 group->lig_rwcount += bytes;
518 group->lig_npages += npages;
520 for (i = 0, page = pages; i < npages;
521 i++, page++, llap++, llap_cookie += llap_cookie_size){
522 llap->llap_magic = LLAP_MAGIC;
523 llap->llap_cookie = llap_cookie;
524 rc = obd_prep_async_page(exp, lsm, NULL, page,
525 (obd_off)page->index << CFS_PAGE_SHIFT,
527 llap, &llap->llap_cookie);
530 llap->llap_cookie = NULL;
533 CDEBUG(D_CACHE, "llap %p page %p group %p obj off "LPU64"\n",
534 llap, page, llap->llap_cookie,
535 (obd_off)pages->index << CFS_PAGE_SHIFT);
536 page->private = (unsigned long)llap;
537 llap->llap_page = page;
538 llap->llap_inode = group->lig_inode;
540 rc = obd_queue_group_io(exp, lsm, NULL, group->lig_oig,
541 llap->llap_cookie, cmd,
542 page->_offset, page->_count,
543 group->lig_params->lrp_brw_flags,
544 ASYNC_READY | ASYNC_URGENT |
545 ASYNC_COUNT_STABLE | ASYNC_GROUP_SYNC);
546 if (!local_lock && cmd == OBD_BRW_READ) {
548 * In OST-side locking case short reads cannot be
551 * The root of the problem is that
553 * kms = lov_merge_size(lsm, 1);
555 * glimpse_size(inode);
559 * logic in the read code (both llite and liblustre)
560 * only works correctly when client holds DLM lock on
561 * [start, end]. Without DLM lock KMS can be
562 * completely out of date, and client can either make
563 * spurious short-read (missing concurrent write), or
564 * return stale data (missing concurrent
565 * truncate). For llite client this is fatal, because
566 * incorrect data are cached and can be later sent
567 * back to the server (vide bug 5047). This is hard to
568 * fix by handling short-reads on the server, as there
569 * is no easy way to communicate file size (or amount
570 * of bytes read/written) back to the client,
571 * _especially_ because OSC pages can be sliced and
572 * dices into multiple RPCs arbitrary. Fortunately,
573 * liblustre doesn't cache data and the worst case is
574 * that we get race with concurrent write or truncate.
582 llap->llap_queued = 1;
589 struct llu_io_group * get_io_group(struct inode *inode, int maxpages,
590 struct lustre_rw_params *params)
592 struct llu_io_group *group;
595 if (!llap_cookie_size)
596 llap_cookie_size = obd_prep_async_page(llu_i2obdexp(inode),
600 OBD_ALLOC(group, LLU_IO_GROUP_SIZE(maxpages));
602 return ERR_PTR(-ENOMEM);
605 group->lig_inode = inode;
606 group->lig_maxpages = maxpages;
607 group->lig_params = params;
608 group->lig_llaps = (struct ll_async_page *)(group + 1);
609 group->lig_pages = (struct page *)(&group->lig_llaps[maxpages]);
610 group->lig_llap_cookies = (void *)(&group->lig_pages[maxpages]);
612 rc = oig_init(&group->lig_oig);
614 OBD_FREE(group, LLU_IO_GROUP_SIZE(maxpages));
621 static int max_io_pages(ssize_t len, int iovlen)
623 return (((len + CFS_PAGE_SIZE -1) / CFS_PAGE_SIZE) + 2 + iovlen - 1);
627 void put_io_group(struct llu_io_group *group)
629 struct lov_stripe_md *lsm = llu_i2info(group->lig_inode)->lli_smd;
630 struct obd_export *exp = llu_i2obdexp(group->lig_inode);
631 struct ll_async_page *llap = group->lig_llaps;
634 for (i = 0; i < group->lig_npages; i++, llap++) {
635 if (llap->llap_cookie)
636 obd_teardown_async_page(exp, lsm, NULL,
640 I_RELE(group->lig_inode);
642 oig_release(group->lig_oig);
643 OBD_FREE(group, LLU_IO_GROUP_SIZE(group->lig_maxpages));
647 ssize_t llu_file_prwv(const struct iovec *iovec, int iovlen,
648 _SYSIO_OFF_T pos, ssize_t len,
651 struct llu_io_session *session = (struct llu_io_session *) private;
652 struct inode *inode = session->lis_inode;
653 struct llu_inode_info *lli = llu_i2info(inode);
654 struct intnl_stat *st = llu_i2stat(inode);
655 struct ll_file_data *fd = lli->lli_file_data;
656 struct lustre_handle lockh = {0};
657 struct lov_stripe_md *lsm = lli->lli_smd;
658 struct obd_export *exp = NULL;
659 struct llu_io_group *iogroup;
660 struct lustre_rw_params p;
663 int err, is_read, iovidx, ret;
665 ssize_t ret_len = len;
668 /* in a large iov read/write we'll be repeatedly called.
669 * so give a chance to answer cancel ast here
671 liblustre_wait_event(0);
673 exp = llu_i2obdexp(inode);
677 if (len == 0 || iovlen == 0)
680 if (pos + len > lli->lli_maxbytes)
683 lustre_build_lock_params(session->lis_cmd, lli->lli_open_flags,
684 lli->lli_sbi->ll_lco.lco_flags,
687 iogroup = get_io_group(inode, max_io_pages(len, iovlen), &p);
689 RETURN(PTR_ERR(iogroup));
691 local_lock = p.lrp_lock_mode != LCK_NL;
693 err = llu_extent_lock(fd, inode, lsm, p.lrp_lock_mode, &p.lrp_policy,
694 &lockh, p.lrp_ast_flags);
698 is_read = (session->lis_cmd == OBD_BRW_READ);
701 * If OST-side locking is used, KMS can be completely out of
702 * date, and, hence, cannot be used for short-read
703 * detection. Rely in OST to handle short reads in that case.
705 inode_init_lvb(inode, &lvb);
706 obd_merge_lvb(exp, lsm, &lvb, 1);
708 /* extent.end is last byte of the range */
709 if (p.lrp_policy.l_extent.end >= kms) {
710 /* A glimpse is necessary to determine whether
711 * we return a short read or some zeroes at
712 * the end of the buffer
714 * In the case of OST-side locking KMS can be
715 * completely out of date and short-reads maybe
716 * mishandled. See llu_queue_pio() for more detailed
719 if ((err = llu_glimpse_size(inode))) {
720 GOTO(err_unlock, err);
725 } else if (lli->lli_open_flags & O_APPEND) {
729 for (iovidx = 0; iovidx < iovlen; iovidx++) {
730 char *buf = (char *) iovec[iovidx].iov_base;
731 size_t count = iovec[iovidx].iov_len;
737 if (IS_BAD_PTR(buf) || IS_BAD_PTR(buf + count)) {
738 GOTO(err_unlock, err = -EFAULT);
742 if (/* local_lock && */ pos >= st->st_size)
745 if (pos >= lli->lli_maxbytes) {
746 GOTO(err_unlock, err = -EFBIG);
748 if (pos + count >= lli->lli_maxbytes)
749 count = lli->lli_maxbytes - pos;
752 ret = llu_queue_pio(session->lis_cmd, iogroup, buf, count, pos);
754 GOTO(err_unlock, err = ret);
758 LASSERT(ret == count);
759 obd_adjust_kms(exp, lsm, pos, 0);
760 /* file size grow immediately */
761 if (pos > st->st_size)
769 LASSERT(len == 0 || is_read); /* libsysio should guarantee this */
771 err = obd_trigger_group_io(exp, lsm, NULL, iogroup->lig_oig);
773 GOTO(err_unlock, err);
775 err = oig_wait(iogroup->lig_oig);
777 CERROR("sync error %d, data corruption possible\n", err);
778 GOTO(err_unlock, err);
781 ret = llu_extent_unlock(fd, inode, lsm, p.lrp_lock_mode, &lockh);
783 CERROR("extent unlock error %d\n", ret);
785 session->lis_groups[session->lis_ngroups++] = iogroup;
789 llu_extent_unlock(fd, inode, lsm, p.lrp_lock_mode, &lockh);
791 put_io_group(iogroup);
792 RETURN((ssize_t)err);
796 struct llu_io_session *get_io_session(struct inode *ino, int ngroups, int cmd)
798 struct llu_io_session *session;
800 OBD_ALLOC(session, LLU_IO_SESSION_SIZE(ngroups));
805 session->lis_inode = ino;
806 session->lis_max_groups = ngroups;
807 session->lis_cmd = cmd;
811 static void put_io_session(struct llu_io_session *session)
815 for (i = 0; i < session->lis_ngroups; i++) {
816 if (session->lis_groups[i]) {
817 put_io_group(session->lis_groups[i]);
818 session->lis_groups[i] = NULL;
822 I_RELE(session->lis_inode);
823 OBD_FREE(session, LLU_IO_SESSION_SIZE(session->lis_max_groups));
826 static int llu_file_rwx(struct inode *ino,
830 struct llu_io_session *session;
832 int cmd = read ? OBD_BRW_READ : OBD_BRW_WRITE;
835 LASSERT(ioctx->ioctx_xtvlen >= 0);
836 LASSERT(ioctx->ioctx_iovlen >= 0);
838 liblustre_wait_event(0);
840 if (!ioctx->ioctx_xtvlen)
843 /* XXX consider other types later */
844 if (S_ISDIR(llu_i2stat(ino)->st_mode))
846 if (!S_ISREG(llu_i2stat(ino)->st_mode))
849 session = get_io_session(ino, ioctx->ioctx_xtvlen * 2, cmd);
853 cc = _sysio_enumerate_extents(ioctx->ioctx_xtv, ioctx->ioctx_xtvlen,
854 ioctx->ioctx_iov, ioctx->ioctx_iovlen,
855 llu_file_prwv, session);
858 LASSERT(!ioctx->ioctx_cc);
859 ioctx->ioctx_private = session;
862 put_io_session(session);
865 liblustre_wait_event(0);
869 int llu_iop_read(struct inode *ino,
873 struct intnl_stat *st = llu_i2stat(ino);
874 st->st_atime = CURRENT_TIME;
876 return llu_file_rwx(ino, ioctx, 1);
879 int llu_iop_write(struct inode *ino,
882 struct intnl_stat *st = llu_i2stat(ino);
883 st->st_mtime = st->st_ctime = CURRENT_TIME;
885 return llu_file_rwx(ino, ioctx, 0);
888 int llu_iop_iodone(struct ioctx *ioctx)
890 struct llu_io_session *session;
891 struct llu_io_group *group;
892 int i, err = 0, rc = 0;
895 liblustre_wait_event(0);
897 session = (struct llu_io_session *) ioctx->ioctx_private;
899 LASSERT(!IS_ERR(session));
901 for (i = 0; i < session->lis_ngroups; i++) {
902 group = session->lis_groups[i];
905 err = oig_wait(group->lig_oig);
910 ioctx->ioctx_cc += group->lig_rwcount;
912 session->lis_groups[i] = NULL;
918 ioctx->ioctx_cc = -1;
919 ioctx->ioctx_errno = -rc;
922 put_io_session(session);
923 ioctx->ioctx_private = NULL;
924 liblustre_wait_event(0);