-/* -*- 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.
/*
* 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/
* Client IO.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
+ * Author: Jinshan Xiong <jinshan.xiong@intel.com>
*/
#define DEBUG_SUBSYSTEM S_CLASS
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#include <obd_class.h>
#include <obd_support.h>
#include <lustre_fid.h>
#include <libcfs/list.h>
-/* lu_time_global_{init,fini}() */
-#include <lu_time.h>
-
#include <cl_object.h>
#include "cl_internal.h"
*/
void cl_io_fini(const struct lu_env *env, struct cl_io *io)
{
- struct cl_io_slice *slice;
- struct cl_thread_info *info;
+ struct cl_io_slice *slice;
+ struct cl_thread_info *info;
LINVRNT(cl_io_type_is_valid(io->ci_type));
LINVRNT(cl_io_invariant(io));
ENTRY;
while (!cfs_list_empty(&io->ci_layers)) {
- slice = container_of(io->ci_layers.next, struct cl_io_slice,
+ slice = container_of(io->ci_layers.prev, struct cl_io_slice,
cis_linkage);
cfs_list_del_init(&slice->cis_linkage);
if (slice->cis_iop->op[io->ci_type].cio_fini != NULL)
info = cl_env_info(env);
if (info->clt_current_io == io)
info->clt_current_io = NULL;
- EXIT;
+
+ /* sanity check for layout change */
+ switch(io->ci_type) {
+ case CIT_READ:
+ case CIT_WRITE:
+ break;
+ case CIT_FAULT:
+ case CIT_FSYNC:
+ LASSERT(!io->ci_need_restart);
+ break;
+ case CIT_SETATTR:
+ case CIT_MISC:
+ /* Check ignore layout change conf */
+ LASSERT(ergo(io->ci_ignore_layout || !io->ci_verify_layout,
+ !io->ci_need_restart));
+ break;
+ default:
+ LBUG();
+ }
+ EXIT;
}
EXPORT_SYMBOL(cl_io_fini);
ENTRY;
- if (io->ci_lockreq == CILR_PEEK) {
- lock = cl_lock_peek(env, io, &link->cill_descr, "io", io);
- if (lock == NULL)
- lock = ERR_PTR(-ENODATA);
- } else
- lock = cl_lock_request(env, io, &link->cill_descr, "io", io);
+ lock = cl_lock_request(env, io, &link->cill_descr, "io", io);
if (!IS_ERR(lock)) {
link->cill_lock = lock;
}
/**
- * True iff \a page is within \a io range.
- */
-static int cl_page_in_io(const struct cl_page *page, const struct cl_io *io)
-{
- int result = 1;
- loff_t start;
- loff_t end;
- pgoff_t idx;
-
- idx = page->cp_index;
- switch (io->ci_type) {
- case CIT_READ:
- case CIT_WRITE:
- /*
- * check that [start, end) and [pos, pos + count) extents
- * overlap.
- */
- if (!cl_io_is_append(io)) {
- const struct cl_io_rw_common *crw = &(io->u.ci_rw);
- start = cl_offset(page->cp_obj, idx);
- end = cl_offset(page->cp_obj, idx + 1);
- result = crw->crw_pos < end &&
- start < crw->crw_pos + crw->crw_count;
- }
- break;
- case CIT_FAULT:
- result = io->u.ci_fault.ft_index == idx;
- break;
- default:
- LBUG();
- }
- return result;
-}
-
-/**
* Called by read io, when page has to be read from the server.
*
* \see cl_io_operations::cio_read_page()
LINVRNT(io->ci_type == CIT_READ || io->ci_type == CIT_FAULT);
LINVRNT(cl_page_is_owned(page, io));
LINVRNT(io->ci_state == CIS_IO_GOING || io->ci_state == CIS_LOCKED);
- LINVRNT(cl_page_in_io(page, io));
LINVRNT(cl_io_invariant(io));
ENTRY;
}
}
if (result == 0)
- result = cl_io_submit_rw(env, io, CRT_READ, queue, CRP_NORMAL);
+ result = cl_io_submit_rw(env, io, CRT_READ, queue);
/*
* Unlock unsent pages in case of error.
*/
EXPORT_SYMBOL(cl_io_read_page);
/**
- * Called by write io to prepare page to receive data from user buffer.
+ * Commit a list of contiguous pages into writeback cache.
*
- * \see cl_io_operations::cio_prepare_write()
+ * \returns 0 if all pages committed, or errcode if error occurred.
+ * \see cl_io_operations::cio_commit_async()
*/
-int cl_io_prepare_write(const struct lu_env *env, struct cl_io *io,
- struct cl_page *page, unsigned from, unsigned to)
-{
- const struct cl_io_slice *scan;
- int result = 0;
-
- LINVRNT(io->ci_type == CIT_WRITE);
- LINVRNT(cl_page_is_owned(page, io));
- LINVRNT(io->ci_state == CIS_IO_GOING || io->ci_state == CIS_LOCKED);
- LINVRNT(cl_io_invariant(io));
- LASSERT(cl_page_in_io(page, io));
- ENTRY;
-
- cl_io_for_each_reverse(scan, io) {
- if (scan->cis_iop->cio_prepare_write != NULL) {
- const struct cl_page_slice *slice;
-
- slice = cl_io_slice_page(scan, page);
- result = scan->cis_iop->cio_prepare_write(env, scan,
- slice,
- from, to);
- if (result != 0)
- break;
- }
- }
- RETURN(result);
-}
-EXPORT_SYMBOL(cl_io_prepare_write);
-
-/**
- * Called by write io after user data were copied into a page.
- *
- * \see cl_io_operations::cio_commit_write()
- */
-int cl_io_commit_write(const struct lu_env *env, struct cl_io *io,
- struct cl_page *page, unsigned from, unsigned to)
-{
- const struct cl_io_slice *scan;
- int result = 0;
-
- LINVRNT(io->ci_type == CIT_WRITE);
- LINVRNT(io->ci_state == CIS_IO_GOING || io->ci_state == CIS_LOCKED);
- LINVRNT(cl_io_invariant(io));
- /*
- * XXX Uh... not nice. Top level cl_io_commit_write() call (vvp->lov)
- * already called cl_page_cache_add(), moving page into CPS_CACHED
- * state. Better (and more general) way of dealing with such situation
- * is needed.
- */
- LASSERT(cl_page_is_owned(page, io) || page->cp_parent != NULL);
- LASSERT(cl_page_in_io(page, io));
- ENTRY;
-
- cl_io_for_each(scan, io) {
- if (scan->cis_iop->cio_commit_write != NULL) {
- const struct cl_page_slice *slice;
-
- slice = cl_io_slice_page(scan, page);
- result = scan->cis_iop->cio_commit_write(env, scan,
- slice,
- from, to);
- if (result != 0)
- break;
- }
- }
- LINVRNT(result <= 0);
- RETURN(result);
-}
-EXPORT_SYMBOL(cl_io_commit_write);
+int cl_io_commit_async(const struct lu_env *env, struct cl_io *io,
+ struct cl_page_list *queue, int from, int to,
+ cl_commit_cbt cb)
+{
+ const struct cl_io_slice *scan;
+ int result = 0;
+ ENTRY;
+
+ cl_io_for_each(scan, io) {
+ if (scan->cis_iop->cio_commit_async == NULL)
+ continue;
+ result = scan->cis_iop->cio_commit_async(env, scan, queue,
+ from, to, cb);
+ if (result != 0)
+ break;
+ }
+ RETURN(result);
+}
+EXPORT_SYMBOL(cl_io_commit_async);
/**
* Submits a list of pages for immediate io.
* \see cl_io_operations::cio_submit()
*/
int cl_io_submit_rw(const struct lu_env *env, struct cl_io *io,
- enum cl_req_type crt, struct cl_2queue *queue,
- enum cl_req_priority priority)
-{
- const struct cl_io_slice *scan;
- int result = 0;
-
- LINVRNT(crt < ARRAY_SIZE(scan->cis_iop->req_op));
- ENTRY;
-
- cl_io_for_each(scan, io) {
- if (scan->cis_iop->req_op[crt].cio_submit == NULL)
- continue;
- result = scan->cis_iop->req_op[crt].cio_submit(env, scan, crt,
- queue, priority);
- if (result != 0)
- break;
- }
- /*
- * If ->cio_submit() failed, no pages were sent.
- */
- LASSERT(ergo(result != 0, cfs_list_empty(&queue->c2_qout.pl_pages)));
- RETURN(result);
+ enum cl_req_type crt, struct cl_2queue *queue)
+{
+ const struct cl_io_slice *scan;
+ int result = 0;
+ ENTRY;
+
+ cl_io_for_each(scan, io) {
+ if (scan->cis_iop->cio_submit == NULL)
+ continue;
+ result = scan->cis_iop->cio_submit(env, scan, crt, queue);
+ if (result != 0)
+ break;
+ }
+ /*
+ * If ->cio_submit() failed, no pages were sent.
+ */
+ LASSERT(ergo(result != 0, cfs_list_empty(&queue->c2_qout.pl_pages)));
+ RETURN(result);
}
EXPORT_SYMBOL(cl_io_submit_rw);
*/
int cl_io_submit_sync(const struct lu_env *env, struct cl_io *io,
enum cl_req_type iot, struct cl_2queue *queue,
- enum cl_req_priority prio, long timeout)
+ long timeout)
{
struct cl_sync_io *anchor = &cl_env_info(env)->clt_anchor;
struct cl_page *pg;
int rc;
- LASSERT(prio == CRP_NORMAL || prio == CRP_CANCEL);
-
cl_page_list_for_each(pg, &queue->c2_qin) {
LASSERT(pg->cp_sync_io == NULL);
pg->cp_sync_io = anchor;
}
cl_sync_io_init(anchor, queue->c2_qin.pl_nr);
- rc = cl_io_submit_rw(env, io, iot, queue, prio);
+ rc = cl_io_submit_rw(env, io, iot, queue);
if (rc == 0) {
/*
* If some pages weren't sent for any reason (e.g.,
cl_page_list_for_each(page, queue) {
int rc;
- LINVRNT(cl_page_in_io(page, io));
rc = cl_page_cancel(env, page);
result = result ?: rc;
}
}
cl_io_iter_fini(env, io);
} while (result == 0 && io->ci_continue);
- RETURN(result < 0 ? result : 0);
+ if (result == 0)
+ result = io->ci_result;
+ RETURN(result < 0 ? result : 0);
}
EXPORT_SYMBOL(cl_io_loop);
*/
void cl_page_list_init(struct cl_page_list *plist)
{
- ENTRY;
- plist->pl_nr = 0;
- CFS_INIT_LIST_HEAD(&plist->pl_pages);
- plist->pl_owner = cfs_current();
- EXIT;
+ ENTRY;
+ plist->pl_nr = 0;
+ CFS_INIT_LIST_HEAD(&plist->pl_pages);
+ plist->pl_owner = current;
+ EXIT;
}
EXPORT_SYMBOL(cl_page_list_init);
*/
void cl_page_list_add(struct cl_page_list *plist, struct cl_page *page)
{
- ENTRY;
- /* it would be better to check that page is owned by "current" io, but
- * it is not passed here. */
- LASSERT(page->cp_owner != NULL);
- LINVRNT(plist->pl_owner == cfs_current());
-
- cfs_lockdep_off();
- cfs_mutex_lock(&page->cp_mutex);
- cfs_lockdep_on();
- LASSERT(cfs_list_empty(&page->cp_batch));
- cfs_list_add_tail(&page->cp_batch, &plist->pl_pages);
- ++plist->pl_nr;
- page->cp_queue_ref = lu_ref_add(&page->cp_reference, "queue", plist);
- cl_page_get(page);
- EXIT;
+ ENTRY;
+ /* it would be better to check that page is owned by "current" io, but
+ * it is not passed here. */
+ LASSERT(page->cp_owner != NULL);
+ LINVRNT(plist->pl_owner == current);
+
+ lockdep_off();
+ mutex_lock(&page->cp_mutex);
+ lockdep_on();
+ LASSERT(cfs_list_empty(&page->cp_batch));
+ cfs_list_add_tail(&page->cp_batch, &plist->pl_pages);
+ ++plist->pl_nr;
+ lu_ref_add_at(&page->cp_reference, &page->cp_queue_ref, "queue", plist);
+ cl_page_get(page);
+ EXIT;
}
EXPORT_SYMBOL(cl_page_list_add);
* Removes a page from a page list.
*/
void cl_page_list_del(const struct lu_env *env,
- struct cl_page_list *plist, struct cl_page *page)
+ struct cl_page_list *plist, struct cl_page *page)
{
- LASSERT(plist->pl_nr > 0);
- LINVRNT(plist->pl_owner == cfs_current());
+ LASSERT(plist->pl_nr > 0);
+ LINVRNT(plist->pl_owner == current);
- ENTRY;
- cfs_list_del_init(&page->cp_batch);
- cfs_lockdep_off();
- cfs_mutex_unlock(&page->cp_mutex);
- cfs_lockdep_on();
- --plist->pl_nr;
- lu_ref_del_at(&page->cp_reference, page->cp_queue_ref, "queue", plist);
- cl_page_put(env, page);
- EXIT;
+ ENTRY;
+ cfs_list_del_init(&page->cp_batch);
+ lockdep_off();
+ mutex_unlock(&page->cp_mutex);
+ lockdep_on();
+ --plist->pl_nr;
+ lu_ref_del_at(&page->cp_reference, &page->cp_queue_ref, "queue", plist);
+ cl_page_put(env, page);
+ EXIT;
}
EXPORT_SYMBOL(cl_page_list_del);
* Moves a page from one page list to another.
*/
void cl_page_list_move(struct cl_page_list *dst, struct cl_page_list *src,
- struct cl_page *page)
+ struct cl_page *page)
{
- LASSERT(src->pl_nr > 0);
- LINVRNT(dst->pl_owner == cfs_current());
- LINVRNT(src->pl_owner == cfs_current());
+ LASSERT(src->pl_nr > 0);
+ LINVRNT(dst->pl_owner == current);
+ LINVRNT(src->pl_owner == current);
- ENTRY;
- cfs_list_move_tail(&page->cp_batch, &dst->pl_pages);
- --src->pl_nr;
- ++dst->pl_nr;
- lu_ref_set_at(&page->cp_reference,
- page->cp_queue_ref, "queue", src, dst);
- EXIT;
+ ENTRY;
+ cfs_list_move_tail(&page->cp_batch, &dst->pl_pages);
+ --src->pl_nr;
+ ++dst->pl_nr;
+ lu_ref_set_at(&page->cp_reference, &page->cp_queue_ref, "queue",
+ src, dst);
+ EXIT;
}
EXPORT_SYMBOL(cl_page_list_move);
/**
+ * Moves a page from one page list to the head of another list.
+ */
+void cl_page_list_move_head(struct cl_page_list *dst, struct cl_page_list *src,
+ struct cl_page *page)
+{
+ LASSERT(src->pl_nr > 0);
+ LINVRNT(dst->pl_owner == current);
+ LINVRNT(src->pl_owner == current);
+
+ ENTRY;
+ cfs_list_move(&page->cp_batch, &dst->pl_pages);
+ --src->pl_nr;
+ ++dst->pl_nr;
+ lu_ref_set_at(&page->cp_reference, &page->cp_queue_ref, "queue",
+ src, dst);
+ EXIT;
+}
+EXPORT_SYMBOL(cl_page_list_move_head);
+
+/**
* splice the cl_page_list, just as list head does
*/
void cl_page_list_splice(struct cl_page_list *list, struct cl_page_list *head)
{
- struct cl_page *page;
- struct cl_page *tmp;
+ struct cl_page *page;
+ struct cl_page *tmp;
- LINVRNT(list->pl_owner == cfs_current());
- LINVRNT(head->pl_owner == cfs_current());
+ LINVRNT(list->pl_owner == current);
+ LINVRNT(head->pl_owner == current);
- ENTRY;
- cl_page_list_for_each_safe(page, tmp, list)
- cl_page_list_move(head, list, page);
- EXIT;
+ ENTRY;
+ cl_page_list_for_each_safe(page, tmp, list)
+ cl_page_list_move(head, list, page);
+ EXIT;
}
EXPORT_SYMBOL(cl_page_list_splice);
* Disowns pages in a queue.
*/
void cl_page_list_disown(const struct lu_env *env,
- struct cl_io *io, struct cl_page_list *plist)
-{
- struct cl_page *page;
- struct cl_page *temp;
-
- LINVRNT(plist->pl_owner == cfs_current());
-
- ENTRY;
- cl_page_list_for_each_safe(page, temp, plist) {
- LASSERT(plist->pl_nr > 0);
-
- cfs_list_del_init(&page->cp_batch);
- cfs_lockdep_off();
- cfs_mutex_unlock(&page->cp_mutex);
- cfs_lockdep_on();
- --plist->pl_nr;
- /*
- * cl_page_disown0 rather than usual cl_page_disown() is used,
- * because pages are possibly in CPS_FREEING state already due
- * to the call to cl_page_list_discard().
- */
- /*
- * XXX cl_page_disown0() will fail if page is not locked.
- */
- cl_page_disown0(env, io, page);
- lu_ref_del(&page->cp_reference, "queue", plist);
- cl_page_put(env, page);
- }
- EXIT;
+ struct cl_io *io, struct cl_page_list *plist)
+{
+ struct cl_page *page;
+ struct cl_page *temp;
+
+ LINVRNT(plist->pl_owner == current);
+
+ ENTRY;
+ cl_page_list_for_each_safe(page, temp, plist) {
+ LASSERT(plist->pl_nr > 0);
+
+ cfs_list_del_init(&page->cp_batch);
+ lockdep_off();
+ mutex_unlock(&page->cp_mutex);
+ lockdep_on();
+ --plist->pl_nr;
+ /*
+ * cl_page_disown0 rather than usual cl_page_disown() is used,
+ * because pages are possibly in CPS_FREEING state already due
+ * to the call to cl_page_list_discard().
+ */
+ /*
+ * XXX cl_page_disown0() will fail if page is not locked.
+ */
+ cl_page_disown0(env, io, page);
+ lu_ref_del_at(&page->cp_reference, &page->cp_queue_ref, "queue",
+ plist);
+ cl_page_put(env, page);
+ }
+ EXIT;
}
EXPORT_SYMBOL(cl_page_list_disown);
*/
void cl_page_list_fini(const struct lu_env *env, struct cl_page_list *plist)
{
- struct cl_page *page;
- struct cl_page *temp;
+ struct cl_page *page;
+ struct cl_page *temp;
- LINVRNT(plist->pl_owner == cfs_current());
+ LINVRNT(plist->pl_owner == current);
- ENTRY;
- cl_page_list_for_each_safe(page, temp, plist)
- cl_page_list_del(env, plist, page);
- LASSERT(plist->pl_nr == 0);
- EXIT;
+ ENTRY;
+ cl_page_list_for_each_safe(page, temp, plist)
+ cl_page_list_del(env, plist, page);
+ LASSERT(plist->pl_nr == 0);
+ EXIT;
}
EXPORT_SYMBOL(cl_page_list_fini);
* Owns all pages in a queue.
*/
int cl_page_list_own(const struct lu_env *env,
- struct cl_io *io, struct cl_page_list *plist)
+ struct cl_io *io, struct cl_page_list *plist)
{
- struct cl_page *page;
- struct cl_page *temp;
- pgoff_t index = 0;
- int result;
+ struct cl_page *page;
+ struct cl_page *temp;
+ int result;
- LINVRNT(plist->pl_owner == cfs_current());
+ LINVRNT(plist->pl_owner == current);
- ENTRY;
- result = 0;
- cl_page_list_for_each_safe(page, temp, plist) {
- LASSERT(index <= page->cp_index);
- index = page->cp_index;
- if (cl_page_own(env, io, page) == 0)
- result = result ?: page->cp_error;
- else
- cl_page_list_del(env, plist, page);
- }
- RETURN(result);
+ ENTRY;
+ result = 0;
+ cl_page_list_for_each_safe(page, temp, plist) {
+ if (cl_page_own(env, io, page) == 0)
+ result = result ?: page->cp_error;
+ else
+ cl_page_list_del(env, plist, page);
+ }
+ RETURN(result);
}
EXPORT_SYMBOL(cl_page_list_own);
* Assumes all pages in a queue.
*/
void cl_page_list_assume(const struct lu_env *env,
- struct cl_io *io, struct cl_page_list *plist)
+ struct cl_io *io, struct cl_page_list *plist)
{
- struct cl_page *page;
+ struct cl_page *page;
- LINVRNT(plist->pl_owner == cfs_current());
+ LINVRNT(plist->pl_owner == current);
- cl_page_list_for_each(page, plist)
- cl_page_assume(env, io, page);
+ cl_page_list_for_each(page, plist)
+ cl_page_assume(env, io, page);
}
EXPORT_SYMBOL(cl_page_list_assume);
* Discards all pages in a queue.
*/
void cl_page_list_discard(const struct lu_env *env, struct cl_io *io,
- struct cl_page_list *plist)
+ struct cl_page_list *plist)
{
- struct cl_page *page;
+ struct cl_page *page;
- LINVRNT(plist->pl_owner == cfs_current());
- ENTRY;
- cl_page_list_for_each(page, plist)
- cl_page_discard(env, io, page);
- EXIT;
+ LINVRNT(plist->pl_owner == current);
+ ENTRY;
+ cl_page_list_for_each(page, plist)
+ cl_page_discard(env, io, page);
+ EXIT;
}
EXPORT_SYMBOL(cl_page_list_discard);
/**
- * Unmaps all pages in a queue from user virtual memory.
- */
-int cl_page_list_unmap(const struct lu_env *env, struct cl_io *io,
- struct cl_page_list *plist)
-{
- struct cl_page *page;
- int result;
-
- LINVRNT(plist->pl_owner == cfs_current());
- ENTRY;
- result = 0;
- cl_page_list_for_each(page, plist) {
- result = cl_page_unmap(env, io, page);
- if (result != 0)
- break;
- }
- RETURN(result);
-}
-EXPORT_SYMBOL(cl_page_list_unmap);
-
-/**
* Initialize dual page queue.
*/
void cl_2queue_init(struct cl_2queue *queue)
/**
* Returns top-level io.
*
- * \see cl_object_top(), cl_page_top().
+ * \see cl_object_top()
*/
struct cl_io *cl_io_top(struct cl_io *io)
{
if (req->crq_o != NULL) {
for (i = 0; i < req->crq_nrobjs; ++i) {
struct cl_object *obj = req->crq_o[i].ro_obj;
- if (obj != NULL) {
- lu_object_ref_del_at(&obj->co_lu,
- req->crq_o[i].ro_obj_ref,
- "cl_req", req);
- cl_object_put(env, obj);
- }
+ if (obj != NULL) {
+ lu_object_ref_del_at(&obj->co_lu,
+ &req->crq_o[i].ro_obj_ref,
+ "cl_req", req);
+ cl_object_put(env, obj);
+ }
}
OBD_FREE(req->crq_o, req->crq_nrobjs * sizeof req->crq_o[0]);
}
static int cl_req_init(const struct lu_env *env, struct cl_req *req,
struct cl_page *page)
{
- struct cl_device *dev;
- struct cl_page_slice *slice;
- int result;
+ struct cl_device *dev;
+ struct cl_page_slice *slice;
+ int result;
- ENTRY;
- result = 0;
- page = cl_page_top(page);
- do {
- cfs_list_for_each_entry(slice, &page->cp_layers, cpl_linkage) {
- dev = lu2cl_dev(slice->cpl_obj->co_lu.lo_dev);
- if (dev->cd_ops->cdo_req_init != NULL) {
- result = dev->cd_ops->cdo_req_init(env,
- dev, req);
- if (result != 0)
- break;
- }
- }
- page = page->cp_child;
- } while (page != NULL && result == 0);
- RETURN(result);
+ ENTRY;
+ result = 0;
+ cfs_list_for_each_entry(slice, &page->cp_layers, cpl_linkage) {
+ dev = lu2cl_dev(slice->cpl_obj->co_lu.lo_dev);
+ if (dev->cd_ops->cdo_req_init != NULL) {
+ result = dev->cd_ops->cdo_req_init(env,
+ dev, req);
+ if (result != 0)
+ break;
+ }
+ }
+ RETURN(result);
}
/**
void cl_req_page_add(const struct lu_env *env,
struct cl_req *req, struct cl_page *page)
{
- struct cl_object *obj;
- struct cl_req_obj *rqo;
- int i;
+ struct cl_object *obj;
+ struct cl_req_obj *rqo;
+ int i;
- ENTRY;
- page = cl_page_top(page);
+ ENTRY;
LASSERT(cfs_list_empty(&page->cp_flight));
LASSERT(page->cp_req == NULL);
if (rqo->ro_obj == NULL) {
rqo->ro_obj = obj;
cl_object_get(obj);
- rqo->ro_obj_ref = lu_object_ref_add(&obj->co_lu,
- "cl_req", req);
- break;
- }
- }
- LASSERT(i < req->crq_nrobjs);
- EXIT;
+ lu_object_ref_add_at(&obj->co_lu, &rqo->ro_obj_ref,
+ "cl_req", req);
+ break;
+ }
+ }
+ LASSERT(i < req->crq_nrobjs);
+ EXIT;
}
EXPORT_SYMBOL(cl_req_page_add);
*/
void cl_req_page_done(const struct lu_env *env, struct cl_page *page)
{
- struct cl_req *req = page->cp_req;
+ struct cl_req *req = page->cp_req;
- ENTRY;
- page = cl_page_top(page);
+ ENTRY;
- LASSERT(!cfs_list_empty(&page->cp_flight));
- LASSERT(req->crq_nrpages > 0);
+ LASSERT(!cfs_list_empty(&page->cp_flight));
+ LASSERT(req->crq_nrpages > 0);
- cfs_list_del_init(&page->cp_flight);
- --req->crq_nrpages;
- page->cp_req = NULL;
- EXIT;
+ cfs_list_del_init(&page->cp_flight);
+ --req->crq_nrpages;
+ page->cp_req = NULL;
+ EXIT;
}
EXPORT_SYMBOL(cl_req_page_done);
*/
void cl_sync_io_init(struct cl_sync_io *anchor, int nrpages)
{
- ENTRY;
- cfs_waitq_init(&anchor->csi_waitq);
- cfs_atomic_set(&anchor->csi_sync_nr, nrpages);
- anchor->csi_sync_rc = 0;
- EXIT;
+ ENTRY;
+ init_waitqueue_head(&anchor->csi_waitq);
+ cfs_atomic_set(&anchor->csi_sync_nr, nrpages);
+ cfs_atomic_set(&anchor->csi_barrier, nrpages > 0);
+ anchor->csi_sync_rc = 0;
+ EXIT;
}
EXPORT_SYMBOL(cl_sync_io_init);
}
LASSERT(cfs_atomic_read(&anchor->csi_sync_nr) == 0);
cl_page_list_assume(env, io, queue);
- POISON(anchor, 0x5a, sizeof *anchor);
- RETURN(rc);
+
+ /* wait until cl_sync_io_note() has done wakeup */
+ while (unlikely(cfs_atomic_read(&anchor->csi_barrier) != 0)) {
+#ifdef __KERNEL__
+ cpu_relax();
+#endif
+ }
+
+ POISON(anchor, 0x5a, sizeof *anchor);
+ RETURN(rc);
}
EXPORT_SYMBOL(cl_sync_io_wait);
* IO.
*/
LASSERT(cfs_atomic_read(&anchor->csi_sync_nr) > 0);
- if (cfs_atomic_dec_and_test(&anchor->csi_sync_nr))
- cfs_waitq_broadcast(&anchor->csi_waitq);
- EXIT;
+ if (cfs_atomic_dec_and_test(&anchor->csi_sync_nr)) {
+ wake_up_all(&anchor->csi_waitq);
+ /* it's safe to nuke or reuse anchor now */
+ cfs_atomic_set(&anchor->csi_barrier, 0);
+ }
+ EXIT;
}
EXPORT_SYMBOL(cl_sync_io_note);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff