280 lines
7.1 KiB
C
280 lines
7.1 KiB
C
/*
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* Copyright (C) 2016 Oracle. All Rights Reserved.
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*
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_defer.h"
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#include "xfs_trans.h"
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#include "xfs_trans_priv.h"
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#include "xfs_rmap_item.h"
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#include "xfs_alloc.h"
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#include "xfs_rmap.h"
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/* Set the map extent flags for this reverse mapping. */
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static void
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xfs_trans_set_rmap_flags(
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struct xfs_map_extent *rmap,
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enum xfs_rmap_intent_type type,
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int whichfork,
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xfs_exntst_t state)
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{
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rmap->me_flags = 0;
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if (state == XFS_EXT_UNWRITTEN)
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rmap->me_flags |= XFS_RMAP_EXTENT_UNWRITTEN;
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if (whichfork == XFS_ATTR_FORK)
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rmap->me_flags |= XFS_RMAP_EXTENT_ATTR_FORK;
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switch (type) {
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case XFS_RMAP_MAP:
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rmap->me_flags |= XFS_RMAP_EXTENT_MAP;
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break;
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case XFS_RMAP_MAP_SHARED:
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rmap->me_flags |= XFS_RMAP_EXTENT_MAP_SHARED;
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break;
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case XFS_RMAP_UNMAP:
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rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP;
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break;
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case XFS_RMAP_UNMAP_SHARED:
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rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP_SHARED;
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break;
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case XFS_RMAP_CONVERT:
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rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT;
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break;
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case XFS_RMAP_CONVERT_SHARED:
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rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT_SHARED;
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break;
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case XFS_RMAP_ALLOC:
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rmap->me_flags |= XFS_RMAP_EXTENT_ALLOC;
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break;
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case XFS_RMAP_FREE:
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rmap->me_flags |= XFS_RMAP_EXTENT_FREE;
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break;
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default:
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ASSERT(0);
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}
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}
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struct xfs_rud_log_item *
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xfs_trans_get_rud(
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struct xfs_trans *tp,
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struct xfs_rui_log_item *ruip)
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{
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struct xfs_rud_log_item *rudp;
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rudp = xfs_rud_init(tp->t_mountp, ruip);
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xfs_trans_add_item(tp, &rudp->rud_item);
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return rudp;
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}
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/*
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* Finish an rmap update and log it to the RUD. Note that the transaction is
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* marked dirty regardless of whether the rmap update succeeds or fails to
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* support the RUI/RUD lifecycle rules.
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*/
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int
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xfs_trans_log_finish_rmap_update(
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struct xfs_trans *tp,
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struct xfs_rud_log_item *rudp,
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enum xfs_rmap_intent_type type,
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__uint64_t owner,
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int whichfork,
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xfs_fileoff_t startoff,
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xfs_fsblock_t startblock,
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xfs_filblks_t blockcount,
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xfs_exntst_t state,
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struct xfs_btree_cur **pcur)
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{
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int error;
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error = xfs_rmap_finish_one(tp, type, owner, whichfork, startoff,
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startblock, blockcount, state, pcur);
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/*
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* Mark the transaction dirty, even on error. This ensures the
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* transaction is aborted, which:
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*
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* 1.) releases the RUI and frees the RUD
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* 2.) shuts down the filesystem
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*/
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tp->t_flags |= XFS_TRANS_DIRTY;
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rudp->rud_item.li_desc->lid_flags |= XFS_LID_DIRTY;
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return error;
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}
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/* Sort rmap intents by AG. */
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static int
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xfs_rmap_update_diff_items(
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void *priv,
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struct list_head *a,
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struct list_head *b)
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{
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struct xfs_mount *mp = priv;
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struct xfs_rmap_intent *ra;
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struct xfs_rmap_intent *rb;
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ra = container_of(a, struct xfs_rmap_intent, ri_list);
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rb = container_of(b, struct xfs_rmap_intent, ri_list);
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return XFS_FSB_TO_AGNO(mp, ra->ri_bmap.br_startblock) -
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XFS_FSB_TO_AGNO(mp, rb->ri_bmap.br_startblock);
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}
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/* Get an RUI. */
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STATIC void *
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xfs_rmap_update_create_intent(
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struct xfs_trans *tp,
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unsigned int count)
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{
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struct xfs_rui_log_item *ruip;
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ASSERT(tp != NULL);
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ASSERT(count > 0);
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ruip = xfs_rui_init(tp->t_mountp, count);
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ASSERT(ruip != NULL);
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/*
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* Get a log_item_desc to point at the new item.
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*/
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xfs_trans_add_item(tp, &ruip->rui_item);
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return ruip;
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}
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/* Log rmap updates in the intent item. */
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STATIC void
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xfs_rmap_update_log_item(
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struct xfs_trans *tp,
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void *intent,
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struct list_head *item)
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{
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struct xfs_rui_log_item *ruip = intent;
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struct xfs_rmap_intent *rmap;
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uint next_extent;
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struct xfs_map_extent *map;
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rmap = container_of(item, struct xfs_rmap_intent, ri_list);
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tp->t_flags |= XFS_TRANS_DIRTY;
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ruip->rui_item.li_desc->lid_flags |= XFS_LID_DIRTY;
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/*
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* atomic_inc_return gives us the value after the increment;
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* we want to use it as an array index so we need to subtract 1 from
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* it.
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*/
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next_extent = atomic_inc_return(&ruip->rui_next_extent) - 1;
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ASSERT(next_extent < ruip->rui_format.rui_nextents);
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map = &ruip->rui_format.rui_extents[next_extent];
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map->me_owner = rmap->ri_owner;
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map->me_startblock = rmap->ri_bmap.br_startblock;
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map->me_startoff = rmap->ri_bmap.br_startoff;
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map->me_len = rmap->ri_bmap.br_blockcount;
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xfs_trans_set_rmap_flags(map, rmap->ri_type, rmap->ri_whichfork,
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rmap->ri_bmap.br_state);
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}
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/* Get an RUD so we can process all the deferred rmap updates. */
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STATIC void *
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xfs_rmap_update_create_done(
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struct xfs_trans *tp,
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void *intent,
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unsigned int count)
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{
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return xfs_trans_get_rud(tp, intent);
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}
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/* Process a deferred rmap update. */
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STATIC int
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xfs_rmap_update_finish_item(
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struct xfs_trans *tp,
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struct xfs_defer_ops *dop,
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struct list_head *item,
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void *done_item,
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void **state)
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{
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struct xfs_rmap_intent *rmap;
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int error;
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rmap = container_of(item, struct xfs_rmap_intent, ri_list);
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error = xfs_trans_log_finish_rmap_update(tp, done_item,
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rmap->ri_type,
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rmap->ri_owner, rmap->ri_whichfork,
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rmap->ri_bmap.br_startoff,
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rmap->ri_bmap.br_startblock,
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rmap->ri_bmap.br_blockcount,
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rmap->ri_bmap.br_state,
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(struct xfs_btree_cur **)state);
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kmem_free(rmap);
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return error;
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}
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/* Clean up after processing deferred rmaps. */
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STATIC void
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xfs_rmap_update_finish_cleanup(
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struct xfs_trans *tp,
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void *state,
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int error)
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{
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struct xfs_btree_cur *rcur = state;
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xfs_rmap_finish_one_cleanup(tp, rcur, error);
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}
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/* Abort all pending RUIs. */
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STATIC void
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xfs_rmap_update_abort_intent(
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void *intent)
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{
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xfs_rui_release(intent);
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}
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/* Cancel a deferred rmap update. */
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STATIC void
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xfs_rmap_update_cancel_item(
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struct list_head *item)
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{
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struct xfs_rmap_intent *rmap;
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rmap = container_of(item, struct xfs_rmap_intent, ri_list);
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kmem_free(rmap);
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}
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static const struct xfs_defer_op_type xfs_rmap_update_defer_type = {
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.type = XFS_DEFER_OPS_TYPE_RMAP,
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.max_items = XFS_RUI_MAX_FAST_EXTENTS,
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.diff_items = xfs_rmap_update_diff_items,
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.create_intent = xfs_rmap_update_create_intent,
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.abort_intent = xfs_rmap_update_abort_intent,
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.log_item = xfs_rmap_update_log_item,
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.create_done = xfs_rmap_update_create_done,
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.finish_item = xfs_rmap_update_finish_item,
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.finish_cleanup = xfs_rmap_update_finish_cleanup,
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.cancel_item = xfs_rmap_update_cancel_item,
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};
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/* Register the deferred op type. */
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void
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xfs_rmap_update_init_defer_op(void)
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{
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xfs_defer_init_op_type(&xfs_rmap_update_defer_type);
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}
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