| /* |
| * GPL HEADER START |
| * |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 only, |
| * as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License version 2 for more details (a copy is included |
| * in the LICENSE file that accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License |
| * version 2 along with this program; If not, see |
| * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2011, 2012, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| * |
| * Implementation of cl_io for OSC layer. |
| * |
| * Author: Nikita Danilov <nikita.danilov@sun.com> |
| * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com> |
| */ |
| |
| #define DEBUG_SUBSYSTEM S_OSC |
| |
| #include "osc_cl_internal.h" |
| |
| /** \addtogroup osc |
| * @{ |
| */ |
| |
| /***************************************************************************** |
| * |
| * Type conversions. |
| * |
| */ |
| |
| static struct osc_req *cl2osc_req(const struct cl_req_slice *slice) |
| { |
| LINVRNT(slice->crs_dev->cd_lu_dev.ld_type == &osc_device_type); |
| return container_of0(slice, struct osc_req, or_cl); |
| } |
| |
| static struct osc_io *cl2osc_io(const struct lu_env *env, |
| const struct cl_io_slice *slice) |
| { |
| struct osc_io *oio = container_of0(slice, struct osc_io, oi_cl); |
| LINVRNT(oio == osc_env_io(env)); |
| return oio; |
| } |
| |
| static struct osc_page *osc_cl_page_osc(struct cl_page *page) |
| { |
| const struct cl_page_slice *slice; |
| |
| slice = cl_page_at(page, &osc_device_type); |
| LASSERT(slice != NULL); |
| |
| return cl2osc_page(slice); |
| } |
| |
| |
| /***************************************************************************** |
| * |
| * io operations. |
| * |
| */ |
| |
| static void osc_io_fini(const struct lu_env *env, const struct cl_io_slice *io) |
| { |
| } |
| |
| /** |
| * An implementation of cl_io_operations::cio_io_submit() method for osc |
| * layer. Iterates over pages in the in-queue, prepares each for io by calling |
| * cl_page_prep() and then either submits them through osc_io_submit_page() |
| * or, if page is already submitted, changes osc flags through |
| * osc_set_async_flags(). |
| */ |
| static int osc_io_submit(const struct lu_env *env, |
| const struct cl_io_slice *ios, |
| enum cl_req_type crt, struct cl_2queue *queue) |
| { |
| struct cl_page *page; |
| struct cl_page *tmp; |
| struct client_obd *cli = NULL; |
| struct osc_object *osc = NULL; /* to keep gcc happy */ |
| struct osc_page *opg; |
| struct cl_io *io; |
| LIST_HEAD (list); |
| |
| struct cl_page_list *qin = &queue->c2_qin; |
| struct cl_page_list *qout = &queue->c2_qout; |
| int queued = 0; |
| int result = 0; |
| int cmd; |
| int brw_flags; |
| int max_pages; |
| |
| LASSERT(qin->pl_nr > 0); |
| |
| CDEBUG(D_CACHE, "%d %d\n", qin->pl_nr, crt); |
| |
| osc = cl2osc(ios->cis_obj); |
| cli = osc_cli(osc); |
| max_pages = cli->cl_max_pages_per_rpc; |
| |
| cmd = crt == CRT_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ; |
| brw_flags = osc_io_srvlock(cl2osc_io(env, ios)) ? OBD_BRW_SRVLOCK : 0; |
| |
| /* |
| * NOTE: here @page is a top-level page. This is done to avoid |
| * creation of sub-page-list. |
| */ |
| cl_page_list_for_each_safe(page, tmp, qin) { |
| struct osc_async_page *oap; |
| |
| /* Top level IO. */ |
| io = page->cp_owner; |
| LASSERT(io != NULL); |
| |
| opg = osc_cl_page_osc(page); |
| oap = &opg->ops_oap; |
| LASSERT(osc == oap->oap_obj); |
| |
| if (!list_empty(&oap->oap_pending_item) || |
| !list_empty(&oap->oap_rpc_item)) { |
| CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n", |
| oap, opg); |
| result = -EBUSY; |
| break; |
| } |
| |
| result = cl_page_prep(env, io, page, crt); |
| if (result != 0) { |
| LASSERT(result < 0); |
| if (result != -EALREADY) |
| break; |
| /* |
| * Handle -EALREADY error: for read case, the page is |
| * already in UPTODATE state; for write, the page |
| * is not dirty. |
| */ |
| result = 0; |
| continue; |
| } |
| |
| cl_page_list_move(qout, qin, page); |
| oap->oap_async_flags = ASYNC_URGENT|ASYNC_READY; |
| oap->oap_async_flags |= ASYNC_COUNT_STABLE; |
| |
| osc_page_submit(env, opg, crt, brw_flags); |
| list_add_tail(&oap->oap_pending_item, &list); |
| if (++queued == max_pages) { |
| queued = 0; |
| result = osc_queue_sync_pages(env, osc, &list, cmd, |
| brw_flags); |
| if (result < 0) |
| break; |
| } |
| } |
| |
| if (queued > 0) |
| result = osc_queue_sync_pages(env, osc, &list, cmd, brw_flags); |
| |
| CDEBUG(D_INFO, "%d/%d %d\n", qin->pl_nr, qout->pl_nr, result); |
| return qout->pl_nr > 0 ? 0 : result; |
| } |
| |
| static void osc_page_touch_at(const struct lu_env *env, |
| struct cl_object *obj, pgoff_t idx, unsigned to) |
| { |
| struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo; |
| struct cl_attr *attr = &osc_env_info(env)->oti_attr; |
| int valid; |
| __u64 kms; |
| |
| /* offset within stripe */ |
| kms = cl_offset(obj, idx) + to; |
| |
| cl_object_attr_lock(obj); |
| /* |
| * XXX old code used |
| * |
| * ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm); |
| * |
| * here |
| */ |
| CDEBUG(D_INODE, "stripe KMS %sincreasing "LPU64"->"LPU64" "LPU64"\n", |
| kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms, |
| loi->loi_lvb.lvb_size); |
| |
| valid = 0; |
| if (kms > loi->loi_kms) { |
| attr->cat_kms = kms; |
| valid |= CAT_KMS; |
| } |
| if (kms > loi->loi_lvb.lvb_size) { |
| attr->cat_size = kms; |
| valid |= CAT_SIZE; |
| } |
| cl_object_attr_set(env, obj, attr, valid); |
| cl_object_attr_unlock(obj); |
| } |
| |
| /** |
| * This is called when a page is accessed within file in a way that creates |
| * new page, if one were missing (i.e., if there were a hole at that place in |
| * the file, or accessed page is beyond the current file size). Examples: |
| * ->commit_write() and ->nopage() methods. |
| * |
| * Expand stripe KMS if necessary. |
| */ |
| static void osc_page_touch(const struct lu_env *env, |
| struct osc_page *opage, unsigned to) |
| { |
| struct cl_page *page = opage->ops_cl.cpl_page; |
| struct cl_object *obj = opage->ops_cl.cpl_obj; |
| |
| osc_page_touch_at(env, obj, page->cp_index, to); |
| } |
| |
| /** |
| * Implements cl_io_operations::cio_prepare_write() method for osc layer. |
| * |
| * \retval -EIO transfer initiated against this osc will most likely fail |
| * \retval 0 transfer initiated against this osc will most likely succeed. |
| * |
| * The reason for this check is to immediately return an error to the caller |
| * in the case of a deactivated import. Note, that import can be deactivated |
| * later, while pages, dirtied by this IO, are still in the cache, but this is |
| * irrelevant, because that would still return an error to the application (if |
| * it does fsync), but many applications don't do fsync because of performance |
| * issues, and we wanted to return an -EIO at write time to notify the |
| * application. |
| */ |
| static int osc_io_prepare_write(const struct lu_env *env, |
| const struct cl_io_slice *ios, |
| const struct cl_page_slice *slice, |
| unsigned from, unsigned to) |
| { |
| struct osc_device *dev = lu2osc_dev(slice->cpl_obj->co_lu.lo_dev); |
| struct obd_import *imp = class_exp2cliimp(dev->od_exp); |
| struct osc_io *oio = cl2osc_io(env, ios); |
| int result = 0; |
| ENTRY; |
| |
| /* |
| * This implements OBD_BRW_CHECK logic from old client. |
| */ |
| |
| if (imp == NULL || imp->imp_invalid) |
| result = -EIO; |
| if (result == 0 && oio->oi_lockless) |
| /* this page contains `invalid' data, but who cares? |
| * nobody can access the invalid data. |
| * in osc_io_commit_write(), we're going to write exact |
| * [from, to) bytes of this page to OST. -jay */ |
| cl_page_export(env, slice->cpl_page, 1); |
| |
| RETURN(result); |
| } |
| |
| static int osc_io_commit_write(const struct lu_env *env, |
| const struct cl_io_slice *ios, |
| const struct cl_page_slice *slice, |
| unsigned from, unsigned to) |
| { |
| struct osc_io *oio = cl2osc_io(env, ios); |
| struct osc_page *opg = cl2osc_page(slice); |
| struct osc_object *obj = cl2osc(opg->ops_cl.cpl_obj); |
| struct osc_async_page *oap = &opg->ops_oap; |
| ENTRY; |
| |
| LASSERT(to > 0); |
| /* |
| * XXX instead of calling osc_page_touch() here and in |
| * osc_io_fault_start() it might be more logical to introduce |
| * cl_page_touch() method, that generic cl_io_commit_write() and page |
| * fault code calls. |
| */ |
| osc_page_touch(env, cl2osc_page(slice), to); |
| if (!client_is_remote(osc_export(obj)) && |
| cfs_capable(CFS_CAP_SYS_RESOURCE)) |
| oap->oap_brw_flags |= OBD_BRW_NOQUOTA; |
| |
| if (oio->oi_lockless) |
| /* see osc_io_prepare_write() for lockless io handling. */ |
| cl_page_clip(env, slice->cpl_page, from, to); |
| |
| RETURN(0); |
| } |
| |
| static int osc_io_fault_start(const struct lu_env *env, |
| const struct cl_io_slice *ios) |
| { |
| struct cl_io *io; |
| struct cl_fault_io *fio; |
| |
| ENTRY; |
| |
| io = ios->cis_io; |
| fio = &io->u.ci_fault; |
| CDEBUG(D_INFO, "%lu %d %d\n", |
| fio->ft_index, fio->ft_writable, fio->ft_nob); |
| /* |
| * If mapping is writeable, adjust kms to cover this page, |
| * but do not extend kms beyond actual file size. |
| * See bug 10919. |
| */ |
| if (fio->ft_writable) |
| osc_page_touch_at(env, ios->cis_obj, |
| fio->ft_index, fio->ft_nob); |
| RETURN(0); |
| } |
| |
| static int osc_async_upcall(void *a, int rc) |
| { |
| struct osc_async_cbargs *args = a; |
| |
| args->opc_rc = rc; |
| complete(&args->opc_sync); |
| return 0; |
| } |
| |
| /** |
| * Checks that there are no pages being written in the extent being truncated. |
| */ |
| static int trunc_check_cb(const struct lu_env *env, struct cl_io *io, |
| struct cl_page *page, void *cbdata) |
| { |
| const struct cl_page_slice *slice; |
| struct osc_page *ops; |
| struct osc_async_page *oap; |
| __u64 start = *(__u64 *)cbdata; |
| |
| slice = cl_page_at(page, &osc_device_type); |
| LASSERT(slice != NULL); |
| ops = cl2osc_page(slice); |
| oap = &ops->ops_oap; |
| |
| if (oap->oap_cmd & OBD_BRW_WRITE && |
| !list_empty(&oap->oap_pending_item)) |
| CL_PAGE_DEBUG(D_ERROR, env, page, "exists " LPU64 "/%s.\n", |
| start, current->comm); |
| |
| { |
| struct page *vmpage = cl_page_vmpage(env, page); |
| if (PageLocked(vmpage)) |
| CDEBUG(D_CACHE, "page %p index %lu locked for %d.\n", |
| ops, page->cp_index, |
| (oap->oap_cmd & OBD_BRW_RWMASK)); |
| } |
| |
| return CLP_GANG_OKAY; |
| } |
| |
| static void osc_trunc_check(const struct lu_env *env, struct cl_io *io, |
| struct osc_io *oio, __u64 size) |
| { |
| struct cl_object *clob; |
| int partial; |
| pgoff_t start; |
| |
| clob = oio->oi_cl.cis_obj; |
| start = cl_index(clob, size); |
| partial = cl_offset(clob, start) < size; |
| |
| /* |
| * Complain if there are pages in the truncated region. |
| */ |
| cl_page_gang_lookup(env, clob, io, start + partial, CL_PAGE_EOF, |
| trunc_check_cb, (void *)&size); |
| } |
| |
| static int osc_io_setattr_start(const struct lu_env *env, |
| const struct cl_io_slice *slice) |
| { |
| struct cl_io *io = slice->cis_io; |
| struct osc_io *oio = cl2osc_io(env, slice); |
| struct cl_object *obj = slice->cis_obj; |
| struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo; |
| struct cl_attr *attr = &osc_env_info(env)->oti_attr; |
| struct obdo *oa = &oio->oi_oa; |
| struct osc_async_cbargs *cbargs = &oio->oi_cbarg; |
| __u64 size = io->u.ci_setattr.sa_attr.lvb_size; |
| unsigned int ia_valid = io->u.ci_setattr.sa_valid; |
| int result = 0; |
| struct obd_info oinfo = { { { 0 } } }; |
| |
| /* truncate cache dirty pages first */ |
| if (cl_io_is_trunc(io)) |
| result = osc_cache_truncate_start(env, oio, cl2osc(obj), size); |
| |
| if (result == 0 && oio->oi_lockless == 0) { |
| cl_object_attr_lock(obj); |
| result = cl_object_attr_get(env, obj, attr); |
| if (result == 0) { |
| struct ost_lvb *lvb = &io->u.ci_setattr.sa_attr; |
| unsigned int cl_valid = 0; |
| |
| if (ia_valid & ATTR_SIZE) { |
| attr->cat_size = attr->cat_kms = size; |
| cl_valid = (CAT_SIZE | CAT_KMS); |
| } |
| if (ia_valid & ATTR_MTIME_SET) { |
| attr->cat_mtime = lvb->lvb_mtime; |
| cl_valid |= CAT_MTIME; |
| } |
| if (ia_valid & ATTR_ATIME_SET) { |
| attr->cat_atime = lvb->lvb_atime; |
| cl_valid |= CAT_ATIME; |
| } |
| if (ia_valid & ATTR_CTIME_SET) { |
| attr->cat_ctime = lvb->lvb_ctime; |
| cl_valid |= CAT_CTIME; |
| } |
| result = cl_object_attr_set(env, obj, attr, cl_valid); |
| } |
| cl_object_attr_unlock(obj); |
| } |
| memset(oa, 0, sizeof(*oa)); |
| if (result == 0) { |
| oa->o_oi = loi->loi_oi; |
| oa->o_mtime = attr->cat_mtime; |
| oa->o_atime = attr->cat_atime; |
| oa->o_ctime = attr->cat_ctime; |
| oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLATIME | |
| OBD_MD_FLCTIME | OBD_MD_FLMTIME; |
| if (ia_valid & ATTR_SIZE) { |
| oa->o_size = size; |
| oa->o_blocks = OBD_OBJECT_EOF; |
| oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS; |
| |
| if (oio->oi_lockless) { |
| oa->o_flags = OBD_FL_SRVLOCK; |
| oa->o_valid |= OBD_MD_FLFLAGS; |
| } |
| } else { |
| LASSERT(oio->oi_lockless == 0); |
| } |
| |
| oinfo.oi_oa = oa; |
| oinfo.oi_capa = io->u.ci_setattr.sa_capa; |
| init_completion(&cbargs->opc_sync); |
| |
| if (ia_valid & ATTR_SIZE) |
| result = osc_punch_base(osc_export(cl2osc(obj)), |
| &oinfo, osc_async_upcall, |
| cbargs, PTLRPCD_SET); |
| else |
| result = osc_setattr_async_base(osc_export(cl2osc(obj)), |
| &oinfo, NULL, |
| osc_async_upcall, |
| cbargs, PTLRPCD_SET); |
| cbargs->opc_rpc_sent = result == 0; |
| } |
| return result; |
| } |
| |
| static void osc_io_setattr_end(const struct lu_env *env, |
| const struct cl_io_slice *slice) |
| { |
| struct cl_io *io = slice->cis_io; |
| struct osc_io *oio = cl2osc_io(env, slice); |
| struct cl_object *obj = slice->cis_obj; |
| struct osc_async_cbargs *cbargs = &oio->oi_cbarg; |
| int result = 0; |
| |
| if (cbargs->opc_rpc_sent) { |
| wait_for_completion(&cbargs->opc_sync); |
| result = io->ci_result = cbargs->opc_rc; |
| } |
| if (result == 0) { |
| if (oio->oi_lockless) { |
| /* lockless truncate */ |
| struct osc_device *osd = lu2osc_dev(obj->co_lu.lo_dev); |
| |
| LASSERT(cl_io_is_trunc(io)); |
| /* XXX: Need a lock. */ |
| osd->od_stats.os_lockless_truncates++; |
| } |
| } |
| |
| if (cl_io_is_trunc(io)) { |
| __u64 size = io->u.ci_setattr.sa_attr.lvb_size; |
| osc_trunc_check(env, io, oio, size); |
| if (oio->oi_trunc != NULL) { |
| osc_cache_truncate_end(env, oio, cl2osc(obj)); |
| oio->oi_trunc = NULL; |
| } |
| } |
| } |
| |
| static int osc_io_read_start(const struct lu_env *env, |
| const struct cl_io_slice *slice) |
| { |
| struct osc_io *oio = cl2osc_io(env, slice); |
| struct cl_object *obj = slice->cis_obj; |
| struct cl_attr *attr = &osc_env_info(env)->oti_attr; |
| int result = 0; |
| ENTRY; |
| |
| if (oio->oi_lockless == 0) { |
| cl_object_attr_lock(obj); |
| result = cl_object_attr_get(env, obj, attr); |
| if (result == 0) { |
| attr->cat_atime = LTIME_S(CFS_CURRENT_TIME); |
| result = cl_object_attr_set(env, obj, attr, |
| CAT_ATIME); |
| } |
| cl_object_attr_unlock(obj); |
| } |
| RETURN(result); |
| } |
| |
| static int osc_io_write_start(const struct lu_env *env, |
| const struct cl_io_slice *slice) |
| { |
| struct osc_io *oio = cl2osc_io(env, slice); |
| struct cl_object *obj = slice->cis_obj; |
| struct cl_attr *attr = &osc_env_info(env)->oti_attr; |
| int result = 0; |
| ENTRY; |
| |
| if (oio->oi_lockless == 0) { |
| OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1); |
| cl_object_attr_lock(obj); |
| result = cl_object_attr_get(env, obj, attr); |
| if (result == 0) { |
| attr->cat_mtime = attr->cat_ctime = |
| LTIME_S(CFS_CURRENT_TIME); |
| result = cl_object_attr_set(env, obj, attr, |
| CAT_MTIME | CAT_CTIME); |
| } |
| cl_object_attr_unlock(obj); |
| } |
| RETURN(result); |
| } |
| |
| static int osc_fsync_ost(const struct lu_env *env, struct osc_object *obj, |
| struct cl_fsync_io *fio) |
| { |
| struct osc_io *oio = osc_env_io(env); |
| struct obdo *oa = &oio->oi_oa; |
| struct obd_info *oinfo = &oio->oi_info; |
| struct lov_oinfo *loi = obj->oo_oinfo; |
| struct osc_async_cbargs *cbargs = &oio->oi_cbarg; |
| int rc = 0; |
| ENTRY; |
| |
| memset(oa, 0, sizeof(*oa)); |
| oa->o_oi = loi->loi_oi; |
| oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP; |
| |
| /* reload size abd blocks for start and end of sync range */ |
| oa->o_size = fio->fi_start; |
| oa->o_blocks = fio->fi_end; |
| oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS; |
| |
| obdo_set_parent_fid(oa, fio->fi_fid); |
| |
| memset(oinfo, 0, sizeof(*oinfo)); |
| oinfo->oi_oa = oa; |
| oinfo->oi_capa = fio->fi_capa; |
| init_completion(&cbargs->opc_sync); |
| |
| rc = osc_sync_base(osc_export(obj), oinfo, osc_async_upcall, cbargs, |
| PTLRPCD_SET); |
| RETURN(rc); |
| } |
| |
| static int osc_io_fsync_start(const struct lu_env *env, |
| const struct cl_io_slice *slice) |
| { |
| struct cl_io *io = slice->cis_io; |
| struct cl_fsync_io *fio = &io->u.ci_fsync; |
| struct cl_object *obj = slice->cis_obj; |
| struct osc_object *osc = cl2osc(obj); |
| pgoff_t start = cl_index(obj, fio->fi_start); |
| pgoff_t end = cl_index(obj, fio->fi_end); |
| int result = 0; |
| ENTRY; |
| |
| if (fio->fi_end == OBD_OBJECT_EOF) |
| end = CL_PAGE_EOF; |
| |
| result = osc_cache_writeback_range(env, osc, start, end, 0, |
| fio->fi_mode == CL_FSYNC_DISCARD); |
| if (result > 0) { |
| fio->fi_nr_written += result; |
| result = 0; |
| } |
| if (fio->fi_mode == CL_FSYNC_ALL) { |
| int rc; |
| |
| /* we have to wait for writeback to finish before we can |
| * send OST_SYNC RPC. This is bad because it causes extents |
| * to be written osc by osc. However, we usually start |
| * writeback before CL_FSYNC_ALL so this won't have any real |
| * problem. */ |
| rc = osc_cache_wait_range(env, osc, start, end); |
| if (result == 0) |
| result = rc; |
| rc = osc_fsync_ost(env, osc, fio); |
| if (result == 0) |
| result = rc; |
| } |
| |
| RETURN(result); |
| } |
| |
| static void osc_io_fsync_end(const struct lu_env *env, |
| const struct cl_io_slice *slice) |
| { |
| struct cl_fsync_io *fio = &slice->cis_io->u.ci_fsync; |
| struct cl_object *obj = slice->cis_obj; |
| pgoff_t start = cl_index(obj, fio->fi_start); |
| pgoff_t end = cl_index(obj, fio->fi_end); |
| int result = 0; |
| |
| if (fio->fi_mode == CL_FSYNC_LOCAL) { |
| result = osc_cache_wait_range(env, cl2osc(obj), start, end); |
| } else if (fio->fi_mode == CL_FSYNC_ALL) { |
| struct osc_io *oio = cl2osc_io(env, slice); |
| struct osc_async_cbargs *cbargs = &oio->oi_cbarg; |
| |
| wait_for_completion(&cbargs->opc_sync); |
| if (result == 0) |
| result = cbargs->opc_rc; |
| } |
| slice->cis_io->ci_result = result; |
| } |
| |
| static void osc_io_end(const struct lu_env *env, |
| const struct cl_io_slice *slice) |
| { |
| struct osc_io *oio = cl2osc_io(env, slice); |
| |
| if (oio->oi_active) { |
| osc_extent_release(env, oio->oi_active); |
| oio->oi_active = NULL; |
| } |
| } |
| |
| static const struct cl_io_operations osc_io_ops = { |
| .op = { |
| [CIT_READ] = { |
| .cio_start = osc_io_read_start, |
| .cio_fini = osc_io_fini |
| }, |
| [CIT_WRITE] = { |
| .cio_start = osc_io_write_start, |
| .cio_end = osc_io_end, |
| .cio_fini = osc_io_fini |
| }, |
| [CIT_SETATTR] = { |
| .cio_start = osc_io_setattr_start, |
| .cio_end = osc_io_setattr_end |
| }, |
| [CIT_FAULT] = { |
| .cio_start = osc_io_fault_start, |
| .cio_end = osc_io_end, |
| .cio_fini = osc_io_fini |
| }, |
| [CIT_FSYNC] = { |
| .cio_start = osc_io_fsync_start, |
| .cio_end = osc_io_fsync_end, |
| .cio_fini = osc_io_fini |
| }, |
| [CIT_MISC] = { |
| .cio_fini = osc_io_fini |
| } |
| }, |
| .req_op = { |
| [CRT_READ] = { |
| .cio_submit = osc_io_submit |
| }, |
| [CRT_WRITE] = { |
| .cio_submit = osc_io_submit |
| } |
| }, |
| .cio_prepare_write = osc_io_prepare_write, |
| .cio_commit_write = osc_io_commit_write |
| }; |
| |
| /***************************************************************************** |
| * |
| * Transfer operations. |
| * |
| */ |
| |
| static int osc_req_prep(const struct lu_env *env, |
| const struct cl_req_slice *slice) |
| { |
| return 0; |
| } |
| |
| static void osc_req_completion(const struct lu_env *env, |
| const struct cl_req_slice *slice, int ioret) |
| { |
| struct osc_req *or; |
| |
| or = cl2osc_req(slice); |
| OBD_SLAB_FREE_PTR(or, osc_req_kmem); |
| } |
| |
| /** |
| * Implementation of struct cl_req_operations::cro_attr_set() for osc |
| * layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq |
| * fields. |
| */ |
| static void osc_req_attr_set(const struct lu_env *env, |
| const struct cl_req_slice *slice, |
| const struct cl_object *obj, |
| struct cl_req_attr *attr, obd_valid flags) |
| { |
| struct lov_oinfo *oinfo; |
| struct cl_req *clerq; |
| struct cl_page *apage; /* _some_ page in @clerq */ |
| struct cl_lock *lock; /* _some_ lock protecting @apage */ |
| struct osc_lock *olck; |
| struct osc_page *opg; |
| struct obdo *oa; |
| struct ost_lvb *lvb; |
| |
| oinfo = cl2osc(obj)->oo_oinfo; |
| lvb = &oinfo->loi_lvb; |
| oa = attr->cra_oa; |
| |
| if ((flags & OBD_MD_FLMTIME) != 0) { |
| oa->o_mtime = lvb->lvb_mtime; |
| oa->o_valid |= OBD_MD_FLMTIME; |
| } |
| if ((flags & OBD_MD_FLATIME) != 0) { |
| oa->o_atime = lvb->lvb_atime; |
| oa->o_valid |= OBD_MD_FLATIME; |
| } |
| if ((flags & OBD_MD_FLCTIME) != 0) { |
| oa->o_ctime = lvb->lvb_ctime; |
| oa->o_valid |= OBD_MD_FLCTIME; |
| } |
| if (flags & OBD_MD_FLGROUP) { |
| ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi)); |
| oa->o_valid |= OBD_MD_FLGROUP; |
| } |
| if (flags & OBD_MD_FLID) { |
| ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi)); |
| oa->o_valid |= OBD_MD_FLID; |
| } |
| if (flags & OBD_MD_FLHANDLE) { |
| clerq = slice->crs_req; |
| LASSERT(!list_empty(&clerq->crq_pages)); |
| apage = container_of(clerq->crq_pages.next, |
| struct cl_page, cp_flight); |
| opg = osc_cl_page_osc(apage); |
| apage = opg->ops_cl.cpl_page; /* now apage is a sub-page */ |
| lock = cl_lock_at_page(env, apage->cp_obj, apage, NULL, 1, 1); |
| if (lock == NULL) { |
| struct cl_object_header *head; |
| struct cl_lock *scan; |
| |
| head = cl_object_header(apage->cp_obj); |
| list_for_each_entry(scan, &head->coh_locks, |
| cll_linkage) |
| CL_LOCK_DEBUG(D_ERROR, env, scan, |
| "no cover page!\n"); |
| CL_PAGE_DEBUG(D_ERROR, env, apage, |
| "dump uncover page!\n"); |
| libcfs_debug_dumpstack(NULL); |
| LBUG(); |
| } |
| |
| olck = osc_lock_at(lock); |
| LASSERT(olck != NULL); |
| LASSERT(ergo(opg->ops_srvlock, olck->ols_lock == NULL)); |
| /* check for lockless io. */ |
| if (olck->ols_lock != NULL) { |
| oa->o_handle = olck->ols_lock->l_remote_handle; |
| oa->o_valid |= OBD_MD_FLHANDLE; |
| } |
| cl_lock_put(env, lock); |
| } |
| } |
| |
| static const struct cl_req_operations osc_req_ops = { |
| .cro_prep = osc_req_prep, |
| .cro_attr_set = osc_req_attr_set, |
| .cro_completion = osc_req_completion |
| }; |
| |
| |
| int osc_io_init(const struct lu_env *env, |
| struct cl_object *obj, struct cl_io *io) |
| { |
| struct osc_io *oio = osc_env_io(env); |
| |
| CL_IO_SLICE_CLEAN(oio, oi_cl); |
| cl_io_slice_add(io, &oio->oi_cl, obj, &osc_io_ops); |
| return 0; |
| } |
| |
| int osc_req_init(const struct lu_env *env, struct cl_device *dev, |
| struct cl_req *req) |
| { |
| struct osc_req *or; |
| int result; |
| |
| OBD_SLAB_ALLOC_PTR_GFP(or, osc_req_kmem, __GFP_IO); |
| if (or != NULL) { |
| cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops); |
| result = 0; |
| } else |
| result = -ENOMEM; |
| return result; |
| } |
| |
| /** @} osc */ |