Release 4.10 fs/xfs/xfs_trans_refcount.c
/*
* Copyright (C) 2016 Oracle. All Rights Reserved.
*
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it would 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#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_refcount_item.h"
#include "xfs_alloc.h"
#include "xfs_refcount.h"
/*
* This routine is called to allocate a "refcount update done"
* log item.
*/
struct xfs_cud_log_item *
xfs_trans_get_cud(
struct xfs_trans *tp,
struct xfs_cui_log_item *cuip)
{
struct xfs_cud_log_item *cudp;
cudp = xfs_cud_init(tp->t_mountp, cuip);
xfs_trans_add_item(tp, &cudp->cud_item);
return cudp;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 46 | 100.00% | 1 | 100.00% |
| Total | 46 | 100.00% | 1 | 100.00% |
/*
* Finish an refcount update and log it to the CUD. Note that the
* transaction is marked dirty regardless of whether the refcount
* update succeeds or fails to support the CUI/CUD lifecycle rules.
*/
int
xfs_trans_log_finish_refcount_update(
struct xfs_trans *tp,
struct xfs_cud_log_item *cudp,
struct xfs_defer_ops *dop,
enum xfs_refcount_intent_type type,
xfs_fsblock_t startblock,
xfs_extlen_t blockcount,
xfs_fsblock_t *new_fsb,
xfs_extlen_t *new_len,
struct xfs_btree_cur **pcur)
{
int error;
error = xfs_refcount_finish_one(tp, dop, type, startblock,
blockcount, new_fsb, new_len, pcur);
/*
* Mark the transaction dirty, even on error. This ensures the
* transaction is aborted, which:
*
* 1.) releases the CUI and frees the CUD
* 2.) shuts down the filesystem
*/
tp->t_flags |= XFS_TRANS_DIRTY;
cudp->cud_item.li_desc->lid_flags |= XFS_LID_DIRTY;
return error;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 88 | 100.00% | 2 | 100.00% |
| Total | 88 | 100.00% | 2 | 100.00% |
/* Sort refcount intents by AG. */
static int
xfs_refcount_update_diff_items(
void *priv,
struct list_head *a,
struct list_head *b)
{
struct xfs_mount *mp = priv;
struct xfs_refcount_intent *ra;
struct xfs_refcount_intent *rb;
ra = container_of(a, struct xfs_refcount_intent, ri_list);
rb = container_of(b, struct xfs_refcount_intent, ri_list);
return XFS_FSB_TO_AGNO(mp, ra->ri_startblock) -
XFS_FSB_TO_AGNO(mp, rb->ri_startblock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 80 | 100.00% | 1 | 100.00% |
| Total | 80 | 100.00% | 1 | 100.00% |
/* Get an CUI. */
STATIC void *
xfs_refcount_update_create_intent(
struct xfs_trans *tp,
unsigned int count)
{
struct xfs_cui_log_item *cuip;
ASSERT(tp != NULL);
ASSERT(count > 0);
cuip = xfs_cui_init(tp->t_mountp, count);
ASSERT(cuip != NULL);
/*
* Get a log_item_desc to point at the new item.
*/
xfs_trans_add_item(tp, &cuip->cui_item);
return cuip;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 67 | 100.00% | 1 | 100.00% |
| Total | 67 | 100.00% | 1 | 100.00% |
/* Set the phys extent flags for this reverse mapping. */
static void
xfs_trans_set_refcount_flags(
struct xfs_phys_extent *refc,
enum xfs_refcount_intent_type type)
{
refc->pe_flags = 0;
switch (type) {
case XFS_REFCOUNT_INCREASE:
case XFS_REFCOUNT_DECREASE:
case XFS_REFCOUNT_ALLOC_COW:
case XFS_REFCOUNT_FREE_COW:
refc->pe_flags |= type;
break;
default:
ASSERT(0);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 52 | 100.00% | 1 | 100.00% |
| Total | 52 | 100.00% | 1 | 100.00% |
/* Log refcount updates in the intent item. */
STATIC void
xfs_refcount_update_log_item(
struct xfs_trans *tp,
void *intent,
struct list_head *item)
{
struct xfs_cui_log_item *cuip = intent;
struct xfs_refcount_intent *refc;
uint next_extent;
struct xfs_phys_extent *ext;
refc = container_of(item, struct xfs_refcount_intent, ri_list);
tp->t_flags |= XFS_TRANS_DIRTY;
cuip->cui_item.li_desc->lid_flags |= XFS_LID_DIRTY;
/*
* 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(&cuip->cui_next_extent) - 1;
ASSERT(next_extent < cuip->cui_format.cui_nextents);
ext = &cuip->cui_format.cui_extents[next_extent];
ext->pe_startblock = refc->ri_startblock;
ext->pe_len = refc->ri_blockcount;
xfs_trans_set_refcount_flags(ext, refc->ri_type);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 129 | 100.00% | 1 | 100.00% |
| Total | 129 | 100.00% | 1 | 100.00% |
/* Get an CUD so we can process all the deferred refcount updates. */
STATIC void *
xfs_refcount_update_create_done(
struct xfs_trans *tp,
void *intent,
unsigned int count)
{
return xfs_trans_get_cud(tp, intent);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
/* Process a deferred refcount update. */
STATIC int
xfs_refcount_update_finish_item(
struct xfs_trans *tp,
struct xfs_defer_ops *dop,
struct list_head *item,
void *done_item,
void **state)
{
struct xfs_refcount_intent *refc;
xfs_fsblock_t new_fsb;
xfs_extlen_t new_aglen;
int error;
refc = container_of(item, struct xfs_refcount_intent, ri_list);
error = xfs_trans_log_finish_refcount_update(tp, done_item, dop,
refc->ri_type,
refc->ri_startblock,
refc->ri_blockcount,
&new_fsb, &new_aglen,
(struct xfs_btree_cur **)state);
/* Did we run out of reservation? Requeue what we didn't finish. */
if (!error && new_aglen > 0) {
ASSERT(refc->ri_type == XFS_REFCOUNT_INCREASE ||
refc->ri_type == XFS_REFCOUNT_DECREASE);
refc->ri_startblock = new_fsb;
refc->ri_blockcount = new_aglen;
return -EAGAIN;
}
kmem_free(refc);
return error;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 144 | 100.00% | 1 | 100.00% |
| Total | 144 | 100.00% | 1 | 100.00% |
/* Clean up after processing deferred refcounts. */
STATIC void
xfs_refcount_update_finish_cleanup(
struct xfs_trans *tp,
void *state,
int error)
{
struct xfs_btree_cur *rcur = state;
xfs_refcount_finish_one_cleanup(tp, rcur, error);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 34 | 100.00% | 1 | 100.00% |
| Total | 34 | 100.00% | 1 | 100.00% |
/* Abort all pending CUIs. */
STATIC void
xfs_refcount_update_abort_intent(
void *intent)
{
xfs_cui_release(intent);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
/* Cancel a deferred refcount update. */
STATIC void
xfs_refcount_update_cancel_item(
struct list_head *item)
{
struct xfs_refcount_intent *refc;
refc = container_of(item, struct xfs_refcount_intent, ri_list);
kmem_free(refc);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
static const struct xfs_defer_op_type xfs_refcount_update_defer_type = {
.type = XFS_DEFER_OPS_TYPE_REFCOUNT,
.max_items = XFS_CUI_MAX_FAST_EXTENTS,
.diff_items = xfs_refcount_update_diff_items,
.create_intent = xfs_refcount_update_create_intent,
.abort_intent = xfs_refcount_update_abort_intent,
.log_item = xfs_refcount_update_log_item,
.create_done = xfs_refcount_update_create_done,
.finish_item = xfs_refcount_update_finish_item,
.finish_cleanup = xfs_refcount_update_finish_cleanup,
.cancel_item = xfs_refcount_update_cancel_item,
};
/* Register the deferred op type. */
void
xfs_refcount_update_init_defer_op(void)
{
xfs_defer_init_op_type(&xfs_refcount_update_defer_type);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 13 | 100.00% | 1 | 100.00% |
| Total | 13 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darrick j. wong | darrick j. wong | 839 | 100.00% | 2 | 100.00% |
| Total | 839 | 100.00% | 2 | 100.00% |
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