X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Flov%2Flov_page.c;h=e5b3221dbcbe67a6601835445508c7c119d25b24;hb=2b23ad0d183141dc25377f2d37de6e6e36ba1169;hp=5d50f8a3670cfe6eac3910a7398a53c9a51744ec;hpb=118bb27a7b2acce63cd0cf52af10f53b95f2a732;p=fs%2Flustre-release.git diff --git a/lustre/lov/lov_page.c b/lustre/lov/lov_page.c index 5d50f8a..e5b3221 100644 --- a/lustre/lov/lov_page.c +++ b/lustre/lov/lov_page.c @@ -1,6 +1,4 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: - * +/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. @@ -26,8 +24,10 @@ * GPL HEADER END */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved. + * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. + * + * Copyright (c) 2011, 2013, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -36,13 +36,16 @@ * Implementation of cl_page for LOV layer. * * Author: Nikita Danilov + * Author: Jinshan Xiong */ #define DEBUG_SUBSYSTEM S_LOV #include "lov_cl_internal.h" -/** \addtogroup lov lov @{ */ +/** \addtogroup lov + * @{ + */ /***************************************************************************** * @@ -50,62 +53,6 @@ * */ -static int lov_page_invariant(const struct cl_page_slice *slice) -{ - const struct cl_page *page = slice->cpl_page; - const struct cl_page *sub = lov_sub_page(slice); - - return ergo(sub != NULL, - page->cp_child == sub && - sub->cp_parent == page && - page->cp_state == sub->cp_state); -} - -static void lov_page_fini(const struct lu_env *env, - struct cl_page_slice *slice) -{ - struct lov_page *lp = cl2lov_page(slice); - struct cl_page *sub = lov_sub_page(slice); - - LINVRNT(lov_page_invariant(slice)); - ENTRY; - - if (sub != NULL) { - LASSERT(sub->cp_state == CPS_FREEING); - lu_ref_del(&sub->cp_reference, "lov", sub->cp_parent); - sub->cp_parent = NULL; - slice->cpl_page->cp_child = NULL; - cl_page_put(env, sub); - } - OBD_SLAB_FREE_PTR(lp, lov_page_kmem); - EXIT; -} - -static void lov_page_own(const struct lu_env *env, - const struct cl_page_slice *slice, struct cl_io *io) -{ - struct lov_io *lio = lov_env_io(env); - struct lov_io_sub *sub; - - LINVRNT(lov_page_invariant(slice)); - LINVRNT(!cl2lov_page(slice)->lps_invalid); - ENTRY; - - sub = lov_page_subio(env, lio, slice); - if (!IS_ERR(sub)) { - lov_sub_page(slice)->cp_owner = sub->sub_io; - lov_sub_put(sub); - } else - LBUG(); /* Arrgh */ - EXIT; -} - -static void lov_page_assume(const struct lu_env *env, - const struct cl_page_slice *slice, struct cl_io *io) -{ - return lov_page_own(env, slice, io); -} - static int lov_page_print(const struct lu_env *env, const struct cl_page_slice *slice, void *cookie, lu_printer_t printer) @@ -116,110 +63,78 @@ static int lov_page_print(const struct lu_env *env, } static const struct cl_page_operations lov_page_ops = { - .cpo_fini = lov_page_fini, - .cpo_own = lov_page_own, - .cpo_assume = lov_page_assume, - .cpo_print = lov_page_print + .cpo_print = lov_page_print }; -static void lov_empty_page_fini(const struct lu_env *env, - struct cl_page_slice *slice) +int lov_page_init_raid0(const struct lu_env *env, struct cl_object *obj, + struct cl_page *page, pgoff_t index) { - struct lov_page *lp = cl2lov_page(slice); - - LASSERT(slice->cpl_page->cp_child == NULL); - ENTRY; - OBD_SLAB_FREE_PTR(lp, lov_page_kmem); - EXIT; + struct lov_object *loo = cl2lov(obj); + struct lov_layout_raid0 *r0 = lov_r0(loo); + struct lov_io *lio = lov_env_io(env); + struct cl_object *subobj; + struct cl_object *o; + struct lov_io_sub *sub; + struct lov_page *lpg = cl_object_page_slice(obj, page); + loff_t offset; + obd_off suboff; + int stripe; + int rc; + ENTRY; + + offset = cl_offset(obj, index); + stripe = lov_stripe_number(loo->lo_lsm, offset); + LASSERT(stripe < r0->lo_nr); + rc = lov_stripe_offset(loo->lo_lsm, offset, stripe, + &suboff); + LASSERT(rc == 0); + + cl_page_slice_add(page, &lpg->lps_cl, obj, &lov_page_ops); + + sub = lov_sub_get(env, lio, stripe); + if (IS_ERR(sub)) + RETURN(PTR_ERR(sub)); + + subobj = lovsub2cl(r0->lo_sub[stripe]); + cfs_list_for_each_entry(o, &subobj->co_lu.lo_header->loh_layers, + co_lu.lo_linkage) { + if (o->co_ops->coo_page_init != NULL) { + rc = o->co_ops->coo_page_init(sub->sub_env, o, page, + cl_index(subobj, suboff)); + if (rc != 0) + break; + } + } + lov_sub_put(sub); + RETURN(rc); } -struct cl_page *lov_page_init_raid0(const struct lu_env *env, - struct cl_object *obj, struct cl_page *page, - cfs_page_t *vmpage) +static int lov_page_empty_print(const struct lu_env *env, + const struct cl_page_slice *slice, + void *cookie, lu_printer_t printer) { - struct lov_page *lpg; - struct lov_object *loo = cl2lov(obj); - int result; - - ENTRY; - OBD_SLAB_ALLOC_PTR_GFP(lpg, lov_page_kmem, CFS_ALLOC_IO); - if (lpg != NULL) { - loff_t offset; - int stripe; - obd_off suboff; - struct cl_page *subpage; - struct cl_object *subobj; - struct lov_layout_raid0 *r0 = lov_r0(loo); - - offset = cl_offset(obj, page->cp_index); - stripe = lov_stripe_number(r0->lo_lsm, offset); - result = lov_stripe_offset(r0->lo_lsm, offset, stripe, - &suboff); - LASSERT(stripe < r0->lo_nr); - LASSERT(result == 0); - - subobj = lovsub2cl(r0->lo_sub[stripe]); - subpage = cl_page_find(env, subobj, - cl_index(subobj, suboff), vmpage, - page->cp_type); - if (!IS_ERR(subpage)) { - if (subpage->cp_parent != NULL) { - /* - * This is only possible when TRANSIENT page - * is being created, and CACHEABLE sub-page - * (attached to already existing top-page) has - * been found. Tell cl_page_find() to use - * existing page. - */ - LASSERT(subpage->cp_type == CPT_CACHEABLE); - LASSERT(page->cp_type == CPT_TRANSIENT); - lpg->lps_invalid = 1; - cl_page_put(env, subpage); - /* - * XXX This assumes that lov is in the topmost - * cl_page. - */ - result = PTR_ERR(cl_page_top(subpage)); - } else { - lu_ref_add(&subpage->cp_reference, "lov", page); - subpage->cp_parent = page; - page->cp_child = subpage; - } - cl_page_slice_add(page, &lpg->lps_cl, - obj, &lov_page_ops); - } else - result = PTR_ERR(subpage); - } else - result = -ENOMEM; - RETURN(ERR_PTR(result)); -} + struct lov_page *lp = cl2lov_page(slice); + return (*printer)(env, cookie, LUSTRE_LOV_NAME"-page@%p, empty.\n", lp); +} static const struct cl_page_operations lov_empty_page_ops = { - .cpo_fini = lov_empty_page_fini, - .cpo_print = lov_page_print + .cpo_print = lov_page_empty_print }; -struct cl_page *lov_page_init_empty(const struct lu_env *env, - struct cl_object *obj, struct cl_page *page, - cfs_page_t *vmpage) +int lov_page_init_empty(const struct lu_env *env, struct cl_object *obj, + struct cl_page *page, pgoff_t index) { - struct lov_page *lpg; - int result = -ENOMEM; - ENTRY; - - OBD_SLAB_ALLOC_PTR_GFP(lpg, lov_page_kmem, CFS_ALLOC_IO); - if (lpg != NULL) { - void *addr; - cl_page_slice_add(page, &lpg->lps_cl, - obj, &lov_empty_page_ops); - addr = cfs_kmap(vmpage); - memset(addr, 0, cl_page_size(obj)); - cfs_kunmap(vmpage); - cl_page_export(env, page, 1); - result = 0; - } - RETURN(ERR_PTR(result)); + struct lov_page *lpg = cl_object_page_slice(obj, page); + void *addr; + ENTRY; + + cl_page_slice_add(page, &lpg->lps_cl, obj, &lov_empty_page_ops); + addr = kmap(page->cp_vmpage); + memset(addr, 0, cl_page_size(obj)); + kunmap(page->cp_vmpage); + cl_page_export(env, page, 1); + RETURN(0); }