1 files changed, 0 insertions, 395 deletions

diff --git a/drivers/staging/lustre/lustre/llite/llite_close.c b/drivers/staging/lustre/lustre/llite/llite_close.c
deleted file mode 100644
index 8644631bf2ba..000000000000
--- a/drivers/staging/lustre/lustre/llite/llite_close.c
+++ /dev/null
@@ -1,395 +0,0 @@
-/*
- * 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) 2003, 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.
- *
- * lustre/llite/llite_close.c
- *
- * Lustre Lite routines to issue a secondary close after writeback
- */
-
-#include <linux/module.h>
-
-#define DEBUG_SUBSYSTEM S_LLITE
-
-#include "llite_internal.h"
-
-/** records that a write is in flight */
-void vvp_write_pending(struct vvp_object *club, struct vvp_page *page)
-{
-	struct ll_inode_info *lli = ll_i2info(club->vob_inode);
-
-	spin_lock(&lli->lli_lock);
-	lli->lli_flags |= LLIF_SOM_DIRTY;
-	if (page && list_empty(&page->vpg_pending_linkage))
-		list_add(&page->vpg_pending_linkage, &club->vob_pending_list);
-	spin_unlock(&lli->lli_lock);
-}
-
-/** records that a write has completed */
-void vvp_write_complete(struct vvp_object *club, struct vvp_page *page)
-{
-	struct ll_inode_info *lli = ll_i2info(club->vob_inode);
-	int rc = 0;
-
-	spin_lock(&lli->lli_lock);
-	if (page && !list_empty(&page->vpg_pending_linkage)) {
-		list_del_init(&page->vpg_pending_linkage);
-		rc = 1;
-	}
-	spin_unlock(&lli->lli_lock);
-	if (rc)
-		ll_queue_done_writing(club->vob_inode, 0);
-}
-
-/** Queues DONE_WRITING if
- * - done writing is allowed;
- * - inode has no no dirty pages;
- */
-void ll_queue_done_writing(struct inode *inode, unsigned long flags)
-{
-	struct ll_inode_info *lli = ll_i2info(inode);
-	struct vvp_object *club = cl2vvp(ll_i2info(inode)->lli_clob);
-
-	spin_lock(&lli->lli_lock);
-	lli->lli_flags |= flags;
-
-	if ((lli->lli_flags & LLIF_DONE_WRITING) &&
-	    list_empty(&club->vob_pending_list)) {
-		struct ll_close_queue *lcq = ll_i2sbi(inode)->ll_lcq;
-
-		if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
-			CWARN("%s: file "DFID"(flags %u) Size-on-MDS valid, done writing allowed and no diry pages\n",
-			      ll_get_fsname(inode->i_sb, NULL, 0),
-			      PFID(ll_inode2fid(inode)), lli->lli_flags);
-		/* DONE_WRITING is allowed and inode has no dirty page. */
-		spin_lock(&lcq->lcq_lock);
-
-		LASSERT(list_empty(&lli->lli_close_list));
-		CDEBUG(D_INODE, "adding inode "DFID" to close list\n",
-		       PFID(ll_inode2fid(inode)));
-		list_add_tail(&lli->lli_close_list, &lcq->lcq_head);
-
-		/* Avoid a concurrent insertion into the close thread queue:
-		 * an inode is already in the close thread, open(), write(),
-		 * close() happen, epoch is closed as the inode is marked as
-		 * LLIF_EPOCH_PENDING. When pages are written inode should not
-		 * be inserted into the queue again, clear this flag to avoid
-		 * it.
-		 */
-		lli->lli_flags &= ~LLIF_DONE_WRITING;
-
-		wake_up(&lcq->lcq_waitq);
-		spin_unlock(&lcq->lcq_lock);
-	}
-	spin_unlock(&lli->lli_lock);
-}
-
-/** Pack SOM attributes info @opdata for CLOSE, DONE_WRITING rpc. */
-void ll_done_writing_attr(struct inode *inode, struct md_op_data *op_data)
-{
-	struct ll_inode_info *lli = ll_i2info(inode);
-
-	op_data->op_flags |= MF_SOM_CHANGE;
-	/* Check if Size-on-MDS attributes are valid. */
-	if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
-		CERROR("%s: inode "DFID"(flags %u) MDS holds lock on Size-on-MDS attributes\n",
-		       ll_get_fsname(inode->i_sb, NULL, 0),
-		       PFID(ll_inode2fid(inode)), lli->lli_flags);
-
-	if (!cl_local_size(inode)) {
-		/* Send Size-on-MDS Attributes if valid. */
-		op_data->op_attr.ia_valid |= ATTR_MTIME_SET | ATTR_CTIME_SET |
-				ATTR_ATIME_SET | ATTR_SIZE | ATTR_BLOCKS;
-	}
-}
-
-/** Closes ioepoch and packs Size-on-MDS attribute if needed into @op_data. */
-void ll_ioepoch_close(struct inode *inode, struct md_op_data *op_data,
-		      struct obd_client_handle **och, unsigned long flags)
-{
-	struct ll_inode_info *lli = ll_i2info(inode);
-	struct vvp_object *club = cl2vvp(ll_i2info(inode)->lli_clob);
-
-	spin_lock(&lli->lli_lock);
-	if (!(list_empty(&club->vob_pending_list))) {
-		if (!(lli->lli_flags & LLIF_EPOCH_PENDING)) {
-			LASSERT(*och);
-			LASSERT(!lli->lli_pending_och);
-			/* Inode is dirty and there is no pending write done
-			 * request yet, DONE_WRITE is to be sent later.
-			 */
-			lli->lli_flags |= LLIF_EPOCH_PENDING;
-			lli->lli_pending_och = *och;
-			spin_unlock(&lli->lli_lock);
-
-			inode = igrab(inode);
-			LASSERT(inode);
-			goto out;
-		}
-		if (flags & LLIF_DONE_WRITING) {
-			/* Some pages are still dirty, it is early to send
-			 * DONE_WRITE. Wait until all pages will be flushed
-			 * and try DONE_WRITE again later.
-			 */
-			LASSERT(!(lli->lli_flags & LLIF_DONE_WRITING));
-			lli->lli_flags |= LLIF_DONE_WRITING;
-			spin_unlock(&lli->lli_lock);
-
-			inode = igrab(inode);
-			LASSERT(inode);
-			goto out;
-		}
-	}
-	CDEBUG(D_INODE, "Epoch %llu closed on "DFID"\n",
-	       ll_i2info(inode)->lli_ioepoch, PFID(&lli->lli_fid));
-	op_data->op_flags |= MF_EPOCH_CLOSE;
-
-	if (flags & LLIF_DONE_WRITING) {
-		LASSERT(lli->lli_flags & LLIF_SOM_DIRTY);
-		LASSERT(!(lli->lli_flags & LLIF_DONE_WRITING));
-		*och = lli->lli_pending_och;
-		lli->lli_pending_och = NULL;
-		lli->lli_flags &= ~LLIF_EPOCH_PENDING;
-	} else {
-		/* Pack Size-on-MDS inode attributes only if they has changed */
-		if (!(lli->lli_flags & LLIF_SOM_DIRTY)) {
-			spin_unlock(&lli->lli_lock);
-			goto out;
-		}
-
-		/* There is a pending DONE_WRITE -- close epoch with no
-		 * attribute change.
-		 */
-		if (lli->lli_flags & LLIF_EPOCH_PENDING) {
-			spin_unlock(&lli->lli_lock);
-			goto out;
-		}
-	}
-
-	LASSERT(list_empty(&club->vob_pending_list));
-	lli->lli_flags &= ~LLIF_SOM_DIRTY;
-	spin_unlock(&lli->lli_lock);
-	ll_done_writing_attr(inode, op_data);
-
-out:
-	return;
-}
-
-/**
- * Cliens updates SOM attributes on MDS (including llog cookies):
- * obd_getattr with no lock and md_setattr.
- */
-int ll_som_update(struct inode *inode, struct md_op_data *op_data)
-{
-	struct ll_inode_info *lli = ll_i2info(inode);
-	struct ptlrpc_request *request = NULL;
-	__u32 old_flags;
-	struct obdo *oa;
-	int rc;
-
-	LASSERT(op_data);
-	if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
-		CERROR("%s: inode "DFID"(flags %u) MDS holds lock on Size-on-MDS attributes\n",
-		       ll_get_fsname(inode->i_sb, NULL, 0),
-		       PFID(ll_inode2fid(inode)), lli->lli_flags);
-
-	oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
-	if (!oa) {
-		CERROR("can't allocate memory for Size-on-MDS update.\n");
-		return -ENOMEM;
-	}
-
-	old_flags = op_data->op_flags;
-	op_data->op_flags = MF_SOM_CHANGE;
-
-	/* If inode is already in another epoch, skip getattr from OSTs. */
-	if (lli->lli_ioepoch == op_data->op_ioepoch) {
-		rc = ll_inode_getattr(inode, oa, op_data->op_ioepoch,
-				      old_flags & MF_GETATTR_LOCK);
-		if (rc) {
-			oa->o_valid = 0;
-			if (rc != -ENOENT)
-				CERROR("%s: inode_getattr failed - unable to send a Size-on-MDS attribute update for inode "DFID": rc = %d\n",
-				       ll_get_fsname(inode->i_sb, NULL, 0),
-				       PFID(ll_inode2fid(inode)), rc);
-		} else {
-			CDEBUG(D_INODE, "Size-on-MDS update on "DFID"\n",
-			       PFID(&lli->lli_fid));
-		}
-		/* Install attributes into op_data. */
-		md_from_obdo(op_data, oa, oa->o_valid);
-	}
-
-	rc = md_setattr(ll_i2sbi(inode)->ll_md_exp, op_data,
-			NULL, 0, NULL, 0, &request, NULL);
-	ptlrpc_req_finished(request);
-
-	kmem_cache_free(obdo_cachep, oa);
-	return rc;
-}
-
-/**
- * Closes the ioepoch and packs all the attributes into @op_data for
- * DONE_WRITING rpc.
- */
-static void ll_prepare_done_writing(struct inode *inode,
-				    struct md_op_data *op_data,
-				    struct obd_client_handle **och)
-{
-	ll_ioepoch_close(inode, op_data, och, LLIF_DONE_WRITING);
-	/* If there is no @och, we do not do D_W yet. */
-	if (!*och)
-		return;
-
-	ll_pack_inode2opdata(inode, op_data, &(*och)->och_fh);
-	ll_prep_md_op_data(op_data, inode, NULL, NULL,
-			   0, 0, LUSTRE_OPC_ANY, NULL);
-}
-
-/** Send a DONE_WRITING rpc. */
-static void ll_done_writing(struct inode *inode)
-{
-	struct obd_client_handle *och = NULL;
-	struct md_op_data *op_data;
-	int rc;
-
-	LASSERT(exp_connect_som(ll_i2mdexp(inode)));
-
-	op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
-	if (!op_data)
-		return;
-
-	ll_prepare_done_writing(inode, op_data, &och);
-	/* If there is no @och, we do not do D_W yet. */
-	if (!och)
-		goto out;
-
-	rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, NULL);
-	if (rc == -EAGAIN)
-		/* MDS has instructed us to obtain Size-on-MDS attribute from
-		 * OSTs and send setattr to back to MDS.
-		 */
-		rc = ll_som_update(inode, op_data);
-	else if (rc) {
-		CERROR("%s: inode "DFID" mdc done_writing failed: rc = %d\n",
-		       ll_get_fsname(inode->i_sb, NULL, 0),
-		       PFID(ll_inode2fid(inode)), rc);
-	}
-out:
-	ll_finish_md_op_data(op_data);
-	if (och) {
-		md_clear_open_replay_data(ll_i2sbi(inode)->ll_md_exp, och);
-		kfree(och);
-	}
-}
-
-static struct ll_inode_info *ll_close_next_lli(struct ll_close_queue *lcq)
-{
-	struct ll_inode_info *lli = NULL;
-
-	spin_lock(&lcq->lcq_lock);
-
-	if (!list_empty(&lcq->lcq_head)) {
-		lli = list_entry(lcq->lcq_head.next, struct ll_inode_info,
-				 lli_close_list);
-		list_del_init(&lli->lli_close_list);
-	} else if (atomic_read(&lcq->lcq_stop)) {
-		lli = ERR_PTR(-EALREADY);
-	}
-
-	spin_unlock(&lcq->lcq_lock);
-	return lli;
-}
-
-static int ll_close_thread(void *arg)
-{
-	struct ll_close_queue *lcq = arg;
-
-	complete(&lcq->lcq_comp);
-
-	while (1) {
-		struct l_wait_info lwi = { 0 };
-		struct ll_inode_info *lli;
-		struct inode *inode;
-
-		l_wait_event_exclusive(lcq->lcq_waitq,
-				       (lli = ll_close_next_lli(lcq)) != NULL,
-				       &lwi);
-		if (IS_ERR(lli))
-			break;
-
-		inode = ll_info2i(lli);
-		CDEBUG(D_INFO, "done_writing for inode "DFID"\n",
-		       PFID(ll_inode2fid(inode)));
-		ll_done_writing(inode);
-		iput(inode);
-	}
-
-	CDEBUG(D_INFO, "ll_close exiting\n");
-	complete(&lcq->lcq_comp);
-	return 0;
-}
-
-int ll_close_thread_start(struct ll_close_queue **lcq_ret)
-{
-	struct ll_close_queue *lcq;
-	struct task_struct *task;
-
-	if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CLOSE_THREAD))
-		return -EINTR;
-
-	lcq = kzalloc(sizeof(*lcq), GFP_NOFS);
-	if (!lcq)
-		return -ENOMEM;
-
-	spin_lock_init(&lcq->lcq_lock);
-	INIT_LIST_HEAD(&lcq->lcq_head);
-	init_waitqueue_head(&lcq->lcq_waitq);
-	init_completion(&lcq->lcq_comp);
-
-	task = kthread_run(ll_close_thread, lcq, "ll_close");
-	if (IS_ERR(task)) {
-		kfree(lcq);
-		return PTR_ERR(task);
-	}
-
-	wait_for_completion(&lcq->lcq_comp);
-	*lcq_ret = lcq;
-	return 0;
-}
-
-void ll_close_thread_shutdown(struct ll_close_queue *lcq)
-{
-	init_completion(&lcq->lcq_comp);
-	atomic_inc(&lcq->lcq_stop);
-	wake_up(&lcq->lcq_waitq);
-	wait_for_completion(&lcq->lcq_comp);
-	kfree(lcq);
-}