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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_defer.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_rmap_item.h"
#include "xfs_alloc.h"
#include "xfs_rmap.h"
/* Set the map extent flags for this reverse mapping. */
static void
xfs_trans_set_rmap_flags(
struct xfs_map_extent *rmap,
enum xfs_rmap_intent_type type,
int whichfork,
xfs_exntst_t state)
{
rmap->me_flags = 0;
if (state == XFS_EXT_UNWRITTEN)
rmap->me_flags |= XFS_RMAP_EXTENT_UNWRITTEN;
if (whichfork == XFS_ATTR_FORK)
rmap->me_flags |= XFS_RMAP_EXTENT_ATTR_FORK;
switch (type) {
case XFS_RMAP_MAP:
rmap->me_flags |= XFS_RMAP_EXTENT_MAP;
break;
case XFS_RMAP_MAP_SHARED:
rmap->me_flags |= XFS_RMAP_EXTENT_MAP_SHARED;
break;
case XFS_RMAP_UNMAP:
rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP;
break;
case XFS_RMAP_UNMAP_SHARED:
rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP_SHARED;
break;
case XFS_RMAP_CONVERT:
rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT;
break;
case XFS_RMAP_CONVERT_SHARED:
rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT_SHARED;
break;
case XFS_RMAP_ALLOC:
rmap->me_flags |= XFS_RMAP_EXTENT_ALLOC;
break;
case XFS_RMAP_FREE:
rmap->me_flags |= XFS_RMAP_EXTENT_FREE;
break;
default:
ASSERT(0);
}
}
struct xfs_rud_log_item *
xfs_trans_get_rud(
struct xfs_trans *tp,
struct xfs_rui_log_item *ruip)
{
struct xfs_rud_log_item *rudp;
rudp = xfs_rud_init(tp->t_mountp, ruip);
xfs_trans_add_item(tp, &rudp->rud_item);
return rudp;
}
/*
* Finish an rmap update and log it to the RUD. Note that the transaction is
* marked dirty regardless of whether the rmap update succeeds or fails to
* support the RUI/RUD lifecycle rules.
*/
int
xfs_trans_log_finish_rmap_update(
struct xfs_trans *tp,
struct xfs_rud_log_item *rudp,
enum xfs_rmap_intent_type type,
uint64_t owner,
int whichfork,
xfs_fileoff_t startoff,
xfs_fsblock_t startblock,
xfs_filblks_t blockcount,
xfs_exntst_t state,
struct xfs_btree_cur **pcur)
{
int error;
error = xfs_rmap_finish_one(tp, type, owner, whichfork, startoff,
startblock, blockcount, state, pcur);
/*
* Mark the transaction dirty, even on error. This ensures the
* transaction is aborted, which:
*
* 1.) releases the RUI and frees the RUD
* 2.) shuts down the filesystem
*/
tp->t_flags |= XFS_TRANS_DIRTY;
set_bit(XFS_LI_DIRTY, &rudp->rud_item.li_flags);
return error;
}
/* Sort rmap intents by AG. */
static int
xfs_rmap_update_diff_items(
void *priv,
struct list_head *a,
struct list_head *b)
{
struct xfs_mount *mp = priv;
struct xfs_rmap_intent *ra;
struct xfs_rmap_intent *rb;
ra = container_of(a, struct xfs_rmap_intent, ri_list);
rb = container_of(b, struct xfs_rmap_intent, ri_list);
return XFS_FSB_TO_AGNO(mp, ra->ri_bmap.br_startblock) -
XFS_FSB_TO_AGNO(mp, rb->ri_bmap.br_startblock);
}
/* Get an RUI. */
STATIC void *
xfs_rmap_update_create_intent(
struct xfs_trans *tp,
unsigned int count)
{
struct xfs_rui_log_item *ruip;
ASSERT(tp != NULL);
ASSERT(count > 0);
ruip = xfs_rui_init(tp->t_mountp, count);
ASSERT(ruip != NULL);
/*
* Get a log_item_desc to point at the new item.
*/
xfs_trans_add_item(tp, &ruip->rui_item);
return ruip;
}
/* Log rmap updates in the intent item. */
STATIC void
xfs_rmap_update_log_item(
struct xfs_trans *tp,
void *intent,
struct list_head *item)
{
struct xfs_rui_log_item *ruip = intent;
struct xfs_rmap_intent *rmap;
uint next_extent;
struct xfs_map_extent *map;
rmap = container_of(item, struct xfs_rmap_intent, ri_list);
tp->t_flags |= XFS_TRANS_DIRTY;
set_bit(XFS_LI_DIRTY, &ruip->rui_item.li_flags);
/*
* atomic_inc_return gives us the value after the increment;
* we want to use it as an array index so we need to subtract 1 from
* it.
*/
next_extent = atomic_inc_return(&ruip->rui_next_extent) - 1;
ASSERT(next_extent < ruip->rui_format.rui_nextents);
map = &ruip->rui_format.rui_extents[next_extent];
map->me_owner = rmap->ri_owner;
map->me_startblock = rmap->ri_bmap.br_startblock;
map->me_startoff = rmap->ri_bmap.br_startoff;
map->me_len = rmap->ri_bmap.br_blockcount;
xfs_trans_set_rmap_flags(map, rmap->ri_type, rmap->ri_whichfork,
rmap->ri_bmap.br_state);
}
/* Get an RUD so we can process all the deferred rmap updates. */
STATIC void *
xfs_rmap_update_create_done(
struct xfs_trans *tp,
void *intent,
unsigned int count)
{
return xfs_trans_get_rud(tp, intent);
}
/* Process a deferred rmap update. */
STATIC int
xfs_rmap_update_finish_item(
struct xfs_trans *tp,
struct list_head *item,
void *done_item,
void **state)
{
struct xfs_rmap_intent *rmap;
int error;
rmap = container_of(item, struct xfs_rmap_intent, ri_list);
error = xfs_trans_log_finish_rmap_update(tp, done_item,
rmap->ri_type,
rmap->ri_owner, rmap->ri_whichfork,
rmap->ri_bmap.br_startoff,
rmap->ri_bmap.br_startblock,
rmap->ri_bmap.br_blockcount,
rmap->ri_bmap.br_state,
(struct xfs_btree_cur **)state);
kmem_free(rmap);
return error;
}
/* Clean up after processing deferred rmaps. */
STATIC void
xfs_rmap_update_finish_cleanup(
struct xfs_trans *tp,
void *state,
int error)
{
struct xfs_btree_cur *rcur = state;
xfs_rmap_finish_one_cleanup(tp, rcur, error);
}
/* Abort all pending RUIs. */
STATIC void
xfs_rmap_update_abort_intent(
void *intent)
{
xfs_rui_release(intent);
}
/* Cancel a deferred rmap update. */
STATIC void
xfs_rmap_update_cancel_item(
struct list_head *item)
{
struct xfs_rmap_intent *rmap;
rmap = container_of(item, struct xfs_rmap_intent, ri_list);
kmem_free(rmap);
}
static const struct xfs_defer_op_type xfs_rmap_update_defer_type = {
.type = XFS_DEFER_OPS_TYPE_RMAP,
.max_items = XFS_RUI_MAX_FAST_EXTENTS,
.diff_items = xfs_rmap_update_diff_items,
.create_intent = xfs_rmap_update_create_intent,
.abort_intent = xfs_rmap_update_abort_intent,
.log_item = xfs_rmap_update_log_item,
.create_done = xfs_rmap_update_create_done,
.finish_item = xfs_rmap_update_finish_item,
.finish_cleanup = xfs_rmap_update_finish_cleanup,
.cancel_item = xfs_rmap_update_cancel_item,
};
/* Register the deferred op type. */
void
xfs_rmap_update_init_defer_op(void)
{
xfs_defer_init_op_type(&xfs_rmap_update_defer_type);
}
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