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);
202 lvb = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*lvb));
203 lvb->lvb_size = lli->lli_smd->lsm_oinfo[stripe]->loi_kms;
205 LDLM_DEBUG(lock, "i_size: %llu -> stripe number %u -> kms "LPU64,
206 (__u64)llu_i2stat(inode)->st_size, stripe,lvb->lvb_size);
210 /* These errors are normal races, so we don't want to fill the console
211 * with messages by calling ptlrpc_error() */
212 if (rc == -ELDLM_NO_LOCK_DATA)
213 lustre_pack_reply(req, 1, NULL, NULL);
219 static void llu_merge_lvb(struct inode *inode)
221 struct llu_inode_info *lli = llu_i2info(inode);
222 struct llu_sb_info *sbi = llu_i2sbi(inode);
223 struct intnl_stat *st = llu_i2stat(inode);
227 inode_init_lvb(inode, &lvb);
228 obd_merge_lvb(sbi->ll_dt_exp, lli->lli_smd, &lvb, 0);
229 st->st_size = lvb.lvb_size;
230 st->st_blocks = lvb.lvb_blocks;
231 st->st_mtime = lvb.lvb_mtime;
232 st->st_atime = lvb.lvb_atime;
233 st->st_ctime = lvb.lvb_ctime;
237 int llu_local_size(struct inode *inode)
239 ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
240 struct llu_inode_info *lli = llu_i2info(inode);
241 struct llu_sb_info *sbi = llu_i2sbi(inode);
242 struct lustre_handle lockh = { 0 };
247 if (lli->lli_smd->lsm_stripe_count == 0)
250 rc = obd_match(sbi->ll_dt_exp, lli->lli_smd, LDLM_EXTENT,
251 &policy, LCK_PR, &flags, inode, &lockh);
257 llu_merge_lvb(inode);
258 obd_cancel(sbi->ll_dt_exp, lli->lli_smd, LCK_PR, &lockh);
262 /* NB: lov_merge_size will prefer locally cached writes if they extend the
263 * file (because it prefers KMS over RSS when larger) */
264 int llu_glimpse_size(struct inode *inode)
266 struct llu_inode_info *lli = llu_i2info(inode);
267 struct intnl_stat *st = llu_i2stat(inode);
268 struct llu_sb_info *sbi = llu_i2sbi(inode);
269 struct lustre_handle lockh = { 0 };
270 struct ldlm_enqueue_info einfo = { 0 };
271 struct obd_info oinfo = { { { 0 } } };
275 /* If size is cached on the mds, skip glimpse. */
276 if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
279 CDEBUG(D_DLMTRACE, "Glimpsing inode "LPU64"\n", (__u64)st->st_ino);
282 CDEBUG(D_DLMTRACE, "No objects for inode "LPU64"\n",
287 einfo.ei_type = LDLM_EXTENT;
288 einfo.ei_mode = LCK_PR;
289 einfo.ei_cb_bl = llu_extent_lock_callback;
290 einfo.ei_cb_cp = ldlm_completion_ast;
291 einfo.ei_cb_gl = llu_glimpse_callback;
292 einfo.ei_cbdata = inode;
294 oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
295 oinfo.oi_lockh = &lockh;
296 oinfo.oi_md = lli->lli_smd;
297 oinfo.oi_flags = LDLM_FL_HAS_INTENT;
299 rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
301 CERROR("obd_enqueue returned rc %d, returning -EIO\n", rc);
302 RETURN(rc > 0 ? -EIO : rc);
305 llu_merge_lvb(inode);
306 CDEBUG(D_DLMTRACE, "glimpse: size: "LPU64", blocks: "LPU64"\n",
307 (__u64)st->st_size, (__u64)st->st_blocks);
312 int llu_extent_lock(struct ll_file_data *fd, struct inode *inode,
313 struct lov_stripe_md *lsm, int mode,
314 ldlm_policy_data_t *policy, struct lustre_handle *lockh,
317 struct llu_sb_info *sbi = llu_i2sbi(inode);
318 struct intnl_stat *st = llu_i2stat(inode);
319 struct ldlm_enqueue_info einfo = { 0 };
320 struct obd_info oinfo = { { { 0 } } };
325 LASSERT(!lustre_handle_is_used(lockh));
326 CLASSERT(ELDLM_OK == 0);
328 /* XXX phil: can we do this? won't it screw the file size up? */
329 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
330 (sbi->ll_flags & LL_SBI_NOLCK) || mode == LCK_NL)
333 CDEBUG(D_DLMTRACE, "Locking inode %llu, start "LPU64" end "LPU64"\n",
334 (__u64)st->st_ino, policy->l_extent.start,
335 policy->l_extent.end);
337 einfo.ei_type = LDLM_EXTENT;
338 einfo.ei_mode = mode;
339 einfo.ei_cb_bl = llu_extent_lock_callback;
340 einfo.ei_cb_cp = ldlm_completion_ast;
341 einfo.ei_cb_gl = llu_glimpse_callback;
342 einfo.ei_cbdata = inode;
344 oinfo.oi_policy = *policy;
345 oinfo.oi_lockh = lockh;
347 oinfo.oi_flags = ast_flags;
349 rc = obd_enqueue(sbi->ll_dt_exp, &oinfo, &einfo, NULL);
350 *policy = oinfo.oi_policy;
354 inode_init_lvb(inode, &lvb);
355 obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
356 if (policy->l_extent.start == 0 &&
357 policy->l_extent.end == OBD_OBJECT_EOF)
358 st->st_size = lvb.lvb_size;
361 st->st_mtime = lvb.lvb_mtime;
362 st->st_atime = lvb.lvb_atime;
363 st->st_ctime = lvb.lvb_ctime;
369 int llu_extent_unlock(struct ll_file_data *fd, struct inode *inode,
370 struct lov_stripe_md *lsm, int mode,
371 struct lustre_handle *lockh)
373 struct llu_sb_info *sbi = llu_i2sbi(inode);
377 CLASSERT(ELDLM_OK == 0);
379 /* XXX phil: can we do this? won't it screw the file size up? */
380 if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
381 (sbi->ll_flags & LL_SBI_NOLCK) || mode == LCK_NL)
384 rc = obd_cancel(sbi->ll_dt_exp, lsm, mode, lockh);
389 #define LLAP_MAGIC 12346789
391 struct ll_async_page {
395 struct page *llap_page;
396 struct inode *llap_inode;
399 static void llu_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
401 struct ll_async_page *llap;
403 struct lov_stripe_md *lsm;
404 obd_flag valid_flags;
407 llap = LLAP_FROM_COOKIE(data);
408 inode = llap->llap_inode;
409 lsm = llu_i2info(inode)->lli_smd;
411 oa->o_id = lsm->lsm_object_id;
412 oa->o_valid = OBD_MD_FLID;
413 valid_flags = OBD_MD_FLTYPE | OBD_MD_FLATIME;
414 if (cmd & OBD_BRW_WRITE)
415 valid_flags |= OBD_MD_FLMTIME | OBD_MD_FLCTIME |
416 OBD_MD_FLUID | OBD_MD_FLGID |
417 OBD_MD_FLFID | OBD_MD_FLGENER;
419 obdo_from_inode(oa, inode, valid_flags);
423 static void llu_ap_update_obdo(void *data, int cmd, struct obdo *oa,
426 struct ll_async_page *llap;
429 llap = LLAP_FROM_COOKIE(data);
430 obdo_from_inode(oa, llap->llap_inode, valid);
435 /* called for each page in a completed rpc.*/
436 static int llu_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
438 struct ll_async_page *llap;
442 llap = LLAP_FROM_COOKIE(data);
443 llap->llap_queued = 0;
444 page = llap->llap_page;
447 if (cmd & OBD_BRW_WRITE)
448 CERROR("writeback error on page %p index %ld: %d\n",
449 page, page->index, rc);
454 static struct obd_capa * llu_ap_lookup_capa(void *data, int cmd)
459 static struct obd_async_page_ops llu_async_page_ops = {
460 .ap_make_ready = NULL,
461 .ap_refresh_count = NULL,
462 .ap_fill_obdo = llu_ap_fill_obdo,
463 .ap_update_obdo = llu_ap_update_obdo,
464 .ap_completion = llu_ap_completion,
465 .ap_lookup_capa = llu_ap_lookup_capa,
468 static int llu_queue_pio(int cmd, struct llu_io_group *group,
469 char *buf, size_t count, loff_t pos)
471 struct llu_inode_info *lli = llu_i2info(group->lig_inode);
472 struct intnl_stat *st = llu_i2stat(group->lig_inode);
473 struct lov_stripe_md *lsm = lli->lli_smd;
474 struct obd_export *exp = llu_i2obdexp(group->lig_inode);
475 struct page *pages = &group->lig_pages[group->lig_npages],*page = pages;
476 struct ll_async_page *llap = &group->lig_llaps[group->lig_npages];
477 void *llap_cookie = group->lig_llap_cookies +
478 llap_cookie_size * group->lig_npages;
479 int i, rc, npages = 0, ret_bytes = 0;
486 local_lock = group->lig_params->lrp_lock_mode != LCK_NL;
487 /* prepare the pages array */
489 unsigned long index, offset, bytes;
491 offset = (pos & ~CFS_PAGE_MASK);
492 index = pos >> CFS_PAGE_SHIFT;
493 bytes = CFS_PAGE_SIZE - offset;
497 /* prevent read beyond file range */
498 if (/* local_lock && */
499 cmd == OBD_BRW_READ && pos + bytes >= st->st_size) {
500 if (pos >= st->st_size)
502 bytes = st->st_size - pos;
505 /* prepare page for this index */
507 page->addr = buf - offset;
509 page->_offset = offset;
510 page->_count = bytes;
518 group->lig_rwcount += bytes;
522 group->lig_npages += npages;
524 for (i = 0, page = pages; i < npages;
525 i++, page++, llap++, llap_cookie += llap_cookie_size){
526 llap->llap_magic = LLAP_MAGIC;
527 llap->llap_cookie = llap_cookie;
528 rc = obd_prep_async_page(exp, lsm, NULL, page,
529 (obd_off)page->index << CFS_PAGE_SHIFT,
531 llap, &llap->llap_cookie);
534 llap->llap_cookie = NULL;
538 CDEBUG(D_CACHE, "llap %p page %p group %p obj off "LPU64"\n",
539 llap, page, llap->llap_cookie,
540 (obd_off)pages->index << CFS_PAGE_SHIFT);
541 page->private = (unsigned long)llap;
542 llap->llap_page = page;
543 llap->llap_inode = group->lig_inode;
545 rc = obd_queue_group_io(exp, lsm, NULL, group->lig_oig,
546 llap->llap_cookie, cmd,
547 page->_offset, page->_count,
548 group->lig_params->lrp_brw_flags,
549 ASYNC_READY | ASYNC_URGENT |
550 ASYNC_COUNT_STABLE | ASYNC_GROUP_SYNC);
551 if (!local_lock && cmd == OBD_BRW_READ) {
553 * In OST-side locking case short reads cannot be
556 * The root of the problem is that
558 * kms = lov_merge_size(lsm, 1);
560 * glimpse_size(inode);
564 * logic in the read code (both llite and liblustre)
565 * only works correctly when client holds DLM lock on
566 * [start, end]. Without DLM lock KMS can be
567 * completely out of date, and client can either make
568 * spurious short-read (missing concurrent write), or
569 * return stale data (missing concurrent
570 * truncate). For llite client this is fatal, because
571 * incorrect data are cached and can be later sent
572 * back to the server (vide bug 5047). This is hard to
573 * fix by handling short-reads on the server, as there
574 * is no easy way to communicate file size (or amount
575 * of bytes read/written) back to the client,
576 * _especially_ because OSC pages can be sliced and
577 * dices into multiple RPCs arbitrary. Fortunately,
578 * liblustre doesn't cache data and the worst case is
579 * that we get race with concurrent write or truncate.
587 llap->llap_queued = 1;
594 struct llu_io_group * get_io_group(struct inode *inode, int maxpages,
595 struct lustre_rw_params *params)
597 struct llu_io_group *group;
600 if (!llap_cookie_size)
601 llap_cookie_size = obd_prep_async_page(llu_i2obdexp(inode),
605 OBD_ALLOC(group, LLU_IO_GROUP_SIZE(maxpages));
607 return ERR_PTR(-ENOMEM);
610 group->lig_inode = inode;
611 group->lig_maxpages = maxpages;
612 group->lig_params = params;
613 group->lig_llaps = (struct ll_async_page *)(group + 1);
614 group->lig_pages = (struct page *)(&group->lig_llaps[maxpages]);
615 group->lig_llap_cookies = (void *)(&group->lig_pages[maxpages]);
617 rc = oig_init(&group->lig_oig);
619 OBD_FREE(group, LLU_IO_GROUP_SIZE(maxpages));
626 static int max_io_pages(ssize_t len, int iovlen)
628 return (((len + CFS_PAGE_SIZE -1) / CFS_PAGE_SIZE) + 2 + iovlen - 1);
632 void put_io_group(struct llu_io_group *group)
634 struct lov_stripe_md *lsm = llu_i2info(group->lig_inode)->lli_smd;
635 struct obd_export *exp = llu_i2obdexp(group->lig_inode);
636 struct ll_async_page *llap = group->lig_llaps;
639 for (i = 0; i < group->lig_npages; i++, llap++) {
640 if (llap->llap_cookie)
641 obd_teardown_async_page(exp, lsm, NULL,
645 I_RELE(group->lig_inode);
647 oig_release(group->lig_oig);
648 OBD_FREE(group, LLU_IO_GROUP_SIZE(group->lig_maxpages));
652 ssize_t llu_file_prwv(const struct iovec *iovec, int iovlen,
653 _SYSIO_OFF_T pos, ssize_t len,
656 struct llu_io_session *session = (struct llu_io_session *) private;
657 struct inode *inode = session->lis_inode;
658 struct llu_inode_info *lli = llu_i2info(inode);
659 struct intnl_stat *st = llu_i2stat(inode);
660 struct ll_file_data *fd = lli->lli_file_data;
661 struct lustre_handle lockh = {0};
662 struct lov_stripe_md *lsm = lli->lli_smd;
663 struct obd_export *exp = NULL;
664 struct llu_io_group *iogroup;
665 struct lustre_rw_params p;
668 int err, is_read, iovidx, ret;
670 ssize_t ret_len = len;
673 /* in a large iov read/write we'll be repeatedly called.
674 * so give a chance to answer cancel ast here
676 liblustre_wait_event(0);
678 exp = llu_i2obdexp(inode);
682 if (len == 0 || iovlen == 0)
685 if (pos + len > lli->lli_maxbytes)
688 lustre_build_lock_params(session->lis_cmd, lli->lli_open_flags,
689 lli->lli_sbi->ll_lco.lco_flags,
692 iogroup = get_io_group(inode, max_io_pages(len, iovlen), &p);
694 RETURN(PTR_ERR(iogroup));
696 local_lock = p.lrp_lock_mode != LCK_NL;
698 err = llu_extent_lock(fd, inode, lsm, p.lrp_lock_mode, &p.lrp_policy,
699 &lockh, p.lrp_ast_flags);
703 is_read = (session->lis_cmd == OBD_BRW_READ);
706 * If OST-side locking is used, KMS can be completely out of
707 * date, and, hence, cannot be used for short-read
708 * detection. Rely in OST to handle short reads in that case.
710 inode_init_lvb(inode, &lvb);
711 obd_merge_lvb(exp, lsm, &lvb, 1);
713 /* extent.end is last byte of the range */
714 if (p.lrp_policy.l_extent.end >= kms) {
715 /* A glimpse is necessary to determine whether
716 * we return a short read or some zeroes at
717 * the end of the buffer
719 * In the case of OST-side locking KMS can be
720 * completely out of date and short-reads maybe
721 * mishandled. See llu_queue_pio() for more detailed
724 if ((err = llu_glimpse_size(inode))) {
725 GOTO(err_unlock, err);
730 } else if (lli->lli_open_flags & O_APPEND) {
734 for (iovidx = 0; iovidx < iovlen; iovidx++) {
735 char *buf = (char *) iovec[iovidx].iov_base;
736 size_t count = iovec[iovidx].iov_len;
742 if (IS_BAD_PTR(buf) || IS_BAD_PTR(buf + count)) {
743 GOTO(err_unlock, err = -EFAULT);
747 if (/* local_lock && */ pos >= st->st_size)
750 if (pos >= lli->lli_maxbytes) {
751 GOTO(err_unlock, err = -EFBIG);
753 if (pos + count >= lli->lli_maxbytes)
754 count = lli->lli_maxbytes - pos;
757 ret = llu_queue_pio(session->lis_cmd, iogroup, buf, count, pos);
759 GOTO(err_unlock, err = ret);
763 LASSERT(ret == count);
764 obd_adjust_kms(exp, lsm, pos, 0);
765 /* file size grow immediately */
766 if (pos > st->st_size)
774 LASSERT(len == 0 || is_read); /* libsysio should guarantee this */
776 err = obd_trigger_group_io(exp, lsm, NULL, iogroup->lig_oig);
778 GOTO(err_unlock, err);
780 err = oig_wait(iogroup->lig_oig);
782 CERROR("%s error: %s\n", is_read ? "read" : "write", strerror(-err));
783 GOTO(err_unlock, err);
786 ret = llu_extent_unlock(fd, inode, lsm, p.lrp_lock_mode, &lockh);
788 CERROR("extent unlock error %d\n", ret);
790 session->lis_groups[session->lis_ngroups++] = iogroup;
794 llu_extent_unlock(fd, inode, lsm, p.lrp_lock_mode, &lockh);
796 put_io_group(iogroup);
797 RETURN((ssize_t)err);
801 struct llu_io_session *get_io_session(struct inode *ino, int ngroups, int cmd)
803 struct llu_io_session *session;
805 OBD_ALLOC(session, LLU_IO_SESSION_SIZE(ngroups));
810 session->lis_inode = ino;
811 session->lis_max_groups = ngroups;
812 session->lis_cmd = cmd;
816 static void put_io_session(struct llu_io_session *session)
820 for (i = 0; i < session->lis_ngroups; i++) {
821 if (session->lis_groups[i]) {
822 put_io_group(session->lis_groups[i]);
823 session->lis_groups[i] = NULL;
827 I_RELE(session->lis_inode);
828 OBD_FREE(session, LLU_IO_SESSION_SIZE(session->lis_max_groups));
831 static int llu_file_rwx(struct inode *ino,
835 struct llu_io_session *session;
837 int cmd = read ? OBD_BRW_READ : OBD_BRW_WRITE;
840 LASSERT(ioctx->ioctx_xtvlen >= 0);
841 LASSERT(ioctx->ioctx_iovlen >= 0);
843 liblustre_wait_event(0);
845 if (!ioctx->ioctx_xtvlen)
848 /* XXX consider other types later */
849 if (S_ISDIR(llu_i2stat(ino)->st_mode))
851 if (!S_ISREG(llu_i2stat(ino)->st_mode))
854 session = get_io_session(ino, ioctx->ioctx_xtvlen * 2, cmd);
858 cc = _sysio_enumerate_extents(ioctx->ioctx_xtv, ioctx->ioctx_xtvlen,
859 ioctx->ioctx_iov, ioctx->ioctx_iovlen,
860 llu_file_prwv, session);
863 LASSERT(!ioctx->ioctx_cc);
864 ioctx->ioctx_private = session;
867 put_io_session(session);
870 liblustre_wait_event(0);
874 int llu_iop_read(struct inode *ino,
878 struct intnl_stat *st = llu_i2stat(ino);
879 st->st_atime = CURRENT_TIME;
881 return llu_file_rwx(ino, ioctx, 1);
884 int llu_iop_write(struct inode *ino,
887 struct intnl_stat *st = llu_i2stat(ino);
888 st->st_mtime = st->st_ctime = CURRENT_TIME;
890 return llu_file_rwx(ino, ioctx, 0);
893 int llu_iop_iodone(struct ioctx *ioctx)
895 struct llu_io_session *session;
896 struct llu_io_group *group;
897 int i, err = 0, rc = 0;
900 liblustre_wait_event(0);
902 session = (struct llu_io_session *) ioctx->ioctx_private;
904 LASSERT(!IS_ERR(session));
906 for (i = 0; i < session->lis_ngroups; i++) {
907 group = session->lis_groups[i];
910 err = oig_wait(group->lig_oig);
915 ioctx->ioctx_cc += group->lig_rwcount;
917 session->lis_groups[i] = NULL;
923 ioctx->ioctx_cc = -1;
924 ioctx->ioctx_errno = -rc;
927 put_io_session(session);
928 ioctx->ioctx_private = NULL;
929 liblustre_wait_event(0);