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* 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.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2015, 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,
struct osc_object *osc)
{
const struct cl_page_slice *slice;
if (osc)
slice = cl_object_page_slice(&osc->oo_cl, page);
else
slice = cl_page_at(page, &osc_device_type);
LASSERT(slice);
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;
unsigned int queued = 0;
int result = 0;
int cmd;
int brw_flags;
unsigned 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);
opg = osc_cl_page_osc(page, osc);
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;
}
spin_lock(&oap->oap_lock);
oap->oap_async_flags = ASYNC_URGENT | ASYNC_READY;
oap->oap_async_flags |= ASYNC_COUNT_STABLE;
spin_unlock(&oap->oap_lock);
osc_page_submit(env, opg, crt, brw_flags);
list_add_tail(&oap->oap_pending_item, &list);
if (page->cp_sync_io)
cl_page_list_move(qout, qin, page);
else /* async IO */
cl_page_list_del(env, qin, page);
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;
}
/**
* 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).
*
* Expand stripe KMS if necessary.
*/
static void osc_page_touch_at(const struct lu_env *env,
struct cl_object *obj, pgoff_t idx, size_t 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 %llu->%llu %llu\n",
kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
loi->loi_lvb.lvb_size);
attr->cat_ctime = LTIME_S(CURRENT_TIME);
attr->cat_mtime = attr->cat_ctime;
valid = CAT_MTIME | CAT_CTIME;
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_update(env, obj, attr, valid);
cl_object_attr_unlock(obj);
}
static int osc_io_commit_async(const struct lu_env *env,
const struct cl_io_slice *ios,
struct cl_page_list *qin, int from, int to,
cl_commit_cbt cb)
{
struct cl_io *io = ios->cis_io;
struct osc_io *oio = cl2osc_io(env, ios);
struct osc_object *osc = cl2osc(ios->cis_obj);
struct cl_page *page;
struct cl_page *last_page;
struct osc_page *opg;
int result = 0;
LASSERT(qin->pl_nr > 0);
/* Handle partial page cases */
last_page = cl_page_list_last(qin);
if (oio->oi_lockless) {
page = cl_page_list_first(qin);
if (page == last_page) {
cl_page_clip(env, page, from, to);
} else {
if (from != 0)
cl_page_clip(env, page, from, PAGE_SIZE);
if (to != PAGE_SIZE)
cl_page_clip(env, last_page, 0, to);
}
}
while (qin->pl_nr > 0) {
struct osc_async_page *oap;
page = cl_page_list_first(qin);
opg = osc_cl_page_osc(page, osc);
oap = &opg->ops_oap;
if (!list_empty(&oap->oap_rpc_item)) {
CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n",
oap, opg);
result = -EBUSY;
break;
}
/* The page may be already in dirty cache. */
if (list_empty(&oap->oap_pending_item)) {
result = osc_page_cache_add(env, &opg->ops_cl, io);
if (result != 0)
break;
}
osc_page_touch_at(env, osc2cl(osc), osc_index(opg),
page == last_page ? to : PAGE_SIZE);
cl_page_list_del(env, qin, page);
(*cb)(env, io, page);
/* Can't access page any more. Page can be in transfer and
* complete at any time.
*/
}
/* for sync write, kernel will wait for this page to be flushed before
* osc_io_end() is called, so release it earlier.
* for mkwrite(), it's known there is no further pages.
*/
if (cl_io_is_sync_write(io) && oio->oi_active) {
osc_extent_release(env, oio->oi_active);
oio->oi_active = NULL;
}
CDEBUG(D_INFO, "%d %d\n", qin->pl_nr, result);
return result;
}
static int osc_io_rw_iter_init(const struct lu_env *env,
const struct cl_io_slice *ios)
{
struct cl_io *io = ios->cis_io;
struct osc_io *oio = osc_env_io(env);
struct osc_object *osc = cl2osc(ios->cis_obj);
struct client_obd *cli = osc_cli(osc);
unsigned long c;
unsigned long npages;
unsigned long max_pages;
if (cl_io_is_append(io))
return 0;
npages = io->u.ci_rw.crw_count >> PAGE_SHIFT;
if (io->u.ci_rw.crw_pos & ~PAGE_MASK)
++npages;
max_pages = cli->cl_max_pages_per_rpc * cli->cl_max_rpcs_in_flight;
if (npages > max_pages)
npages = max_pages;
c = atomic_long_read(cli->cl_lru_left);
if (c < npages && osc_lru_reclaim(cli) > 0)
c = atomic_long_read(cli->cl_lru_left);
while (c >= npages) {
if (c == atomic_long_cmpxchg(cli->cl_lru_left, c, c - npages)) {
oio->oi_lru_reserved = npages;
break;
}
c = atomic_long_read(cli->cl_lru_left);
}
return 0;
}
static void osc_io_rw_iter_fini(const struct lu_env *env,
const struct cl_io_slice *ios)
{
struct osc_io *oio = osc_env_io(env);
struct osc_object *osc = cl2osc(ios->cis_obj);
struct client_obd *cli = osc_cli(osc);
if (oio->oi_lru_reserved > 0) {
atomic_long_add(oio->oi_lru_reserved, cli->cl_lru_left);
oio->oi_lru_reserved = 0;
}
oio->oi_write_osclock = NULL;
}
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;
io = ios->cis_io;
fio = &io->u.ci_fault;
CDEBUG(D_INFO, "%lu %d %zu\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 osc_page *ops, void *cbdata)
{
struct cl_page *page = ops->ops_cl.cpl_page;
struct osc_async_page *oap;
__u64 start = *(__u64 *)cbdata;
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 %llu/%s.\n",
start, current->comm);
if (PageLocked(page->cp_vmpage))
CDEBUG(D_CACHE, "page %p index %lu locked for %d.\n",
ops, osc_index(ops), 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.
*/
osc_page_gang_lookup(env, io, cl2osc(clob),
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 = { };
/* 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 = 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_update(env, obj, attr,
cl_valid);
}
cl_object_attr_unlock(obj);
}
memset(oa, 0, sizeof(*oa));
if (result == 0) {
oa->o_oi = loi->loi_oi;
obdo_set_parent_fid(oa, io->u.ci_setattr.sa_parent_fid);
oa->o_stripe_idx = io->u.ci_setattr.sa_stripe_index;
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;
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 = cbargs->opc_rc;
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) {
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 cl_object *obj = slice->cis_obj;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int rc = 0;
if (!slice->cis_io->ci_noatime) {
cl_object_attr_lock(obj);
attr->cat_atime = ktime_get_real_seconds();
rc = cl_object_attr_update(env, obj, attr, CAT_ATIME);
cl_object_attr_unlock(obj);
}
return rc;
}
static int osc_io_write_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct cl_object *obj = slice->cis_obj;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int rc = 0;
OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
cl_object_attr_lock(obj);
attr->cat_ctime = ktime_get_real_seconds();
attr->cat_mtime = attr->cat_ctime;
rc = cl_object_attr_update(env, obj, attr, CAT_MTIME | CAT_CTIME);
cl_object_attr_unlock(obj);
return rc;
}
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;
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;
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;
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_iter_init = osc_io_rw_iter_init,
.cio_iter_fini = osc_io_rw_iter_fini,
.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
}
},
.cio_submit = osc_io_submit,
.cio_commit_async = osc_io_commit_async
};
/*****************************************************************************
*
* 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);
kmem_cache_free(osc_req_kmem, or);
}
/**
* 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, u64 flags)
{
struct lov_oinfo *oinfo;
struct cl_req *clerq;
struct cl_page *apage; /* _some_ page in @clerq */
struct ldlm_lock *lock; /* _some_ lock protecting @apage */
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, NULL);
lock = osc_dlmlock_at_pgoff(env, cl2osc(obj), osc_index(opg),
1, 1);
if (!lock && !opg->ops_srvlock) {
struct ldlm_resource *res;
struct ldlm_res_id *resname;
CL_PAGE_DEBUG(D_ERROR, env, apage, "uncovered page!\n");
resname = &osc_env_info(env)->oti_resname;
ostid_build_res_name(&oinfo->loi_oi, resname);
res = ldlm_resource_get(
osc_export(cl2osc(obj))->exp_obd->obd_namespace,
NULL, resname, LDLM_EXTENT, 0);
ldlm_resource_dump(D_ERROR, res);
dump_stack();
LBUG();
}
/* check for lockless io. */
if (lock) {
oa->o_handle = lock->l_remote_handle;
oa->o_valid |= OBD_MD_FLHANDLE;
LDLM_LOCK_PUT(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;
or = kmem_cache_zalloc(osc_req_kmem, GFP_NOFS);
if (or) {
cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);
result = 0;
} else {
result = -ENOMEM;
}
return result;
}
/** @} osc */
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