xfs_refcount_item.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2016 Oracle.  All Rights Reserved.
 * Author: Darrick J. Wong <[email protected]>
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_bit.h"
#include "xfs_shared.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_log.h"
#include "xfs_refcount.h"
#include "xfs_error.h"
#include "xfs_log_priv.h"
#include "xfs_log_recover.h"
#include "xfs_ag.h"
#include "xfs_btree.h"
#include "xfs_trace.h"

struct kmem_cache	*xfs_cui_cache;
struct kmem_cache	*xfs_cud_cache;

static const struct xfs_item_ops xfs_cui_item_ops;

static inline struct xfs_cui_log_item *CUI_ITEM(struct xfs_log_item *lip)
{ … }

STATIC void
xfs_cui_item_free(
	struct xfs_cui_log_item	*cuip)
{ … }

/*
 * Freeing the CUI requires that we remove it from the AIL if it has already
 * been placed there. However, the CUI may not yet have been placed in the AIL
 * when called by xfs_cui_release() from CUD processing due to the ordering of
 * committed vs unpin operations in bulk insert operations. Hence the reference
 * count to ensure only the last caller frees the CUI.
 */
STATIC void
xfs_cui_release(
	struct xfs_cui_log_item	*cuip)
{ … }


STATIC void
xfs_cui_item_size(
	struct xfs_log_item	*lip,
	int			*nvecs,
	int			*nbytes)
{ … }

/*
 * This is called to fill in the vector of log iovecs for the
 * given cui log item. We use only 1 iovec, and we point that
 * at the cui_log_format structure embedded in the cui item.
 * It is at this point that we assert that all of the extent
 * slots in the cui item have been filled.
 */
STATIC void
xfs_cui_item_format(
	struct xfs_log_item	*lip,
	struct xfs_log_vec	*lv)
{ … }

/*
 * The unpin operation is the last place an CUI is manipulated in the log. It is
 * either inserted in the AIL or aborted in the event of a log I/O error. In
 * either case, the CUI transaction has been successfully committed to make it
 * this far. Therefore, we expect whoever committed the CUI to either construct
 * and commit the CUD or drop the CUD's reference in the event of error. Simply
 * drop the log's CUI reference now that the log is done with it.
 */
STATIC void
xfs_cui_item_unpin(
	struct xfs_log_item	*lip,
	int			remove)
{ … }

/*
 * The CUI has been either committed or aborted if the transaction has been
 * cancelled. If the transaction was cancelled, an CUD isn't going to be
 * constructed and thus we free the CUI here directly.
 */
STATIC void
xfs_cui_item_release(
	struct xfs_log_item	*lip)
{ … }

/*
 * Allocate and initialize an cui item with the given number of extents.
 */
STATIC struct xfs_cui_log_item *
xfs_cui_init(
	struct xfs_mount		*mp,
	uint				nextents)

{ … }

static inline struct xfs_cud_log_item *CUD_ITEM(struct xfs_log_item *lip)
{ … }

STATIC void
xfs_cud_item_size(
	struct xfs_log_item	*lip,
	int			*nvecs,
	int			*nbytes)
{ … }

/*
 * This is called to fill in the vector of log iovecs for the
 * given cud log item. We use only 1 iovec, and we point that
 * at the cud_log_format structure embedded in the cud item.
 * It is at this point that we assert that all of the extent
 * slots in the cud item have been filled.
 */
STATIC void
xfs_cud_item_format(
	struct xfs_log_item	*lip,
	struct xfs_log_vec	*lv)
{ … }

/*
 * The CUD is either committed or aborted if the transaction is cancelled. If
 * the transaction is cancelled, drop our reference to the CUI and free the
 * CUD.
 */
STATIC void
xfs_cud_item_release(
	struct xfs_log_item	*lip)
{ … }

static struct xfs_log_item *
xfs_cud_item_intent(
	struct xfs_log_item	*lip)
{ … }

static const struct xfs_item_ops xfs_cud_item_ops = …;

static inline struct xfs_refcount_intent *ci_entry(const struct list_head *e)
{ … }

/* Sort refcount intents by AG. */
static int
xfs_refcount_update_diff_items(
	void				*priv,
	const struct list_head		*a,
	const struct list_head		*b)
{ … }

/* Log refcount updates in the intent item. */
STATIC void
xfs_refcount_update_log_item(
	struct xfs_trans		*tp,
	struct xfs_cui_log_item		*cuip,
	struct xfs_refcount_intent	*ri)
{ … }

static struct xfs_log_item *
xfs_refcount_update_create_intent(
	struct xfs_trans		*tp,
	struct list_head		*items,
	unsigned int			count,
	bool				sort)
{ … }

/* Get an CUD so we can process all the deferred refcount updates. */
static struct xfs_log_item *
xfs_refcount_update_create_done(
	struct xfs_trans		*tp,
	struct xfs_log_item		*intent,
	unsigned int			count)
{ … }

/* Add this deferred CUI to the transaction. */
void
xfs_refcount_defer_add(
	struct xfs_trans		*tp,
	struct xfs_refcount_intent	*ri)
{ … }

/* Cancel a deferred refcount update. */
STATIC void
xfs_refcount_update_cancel_item(
	struct list_head		*item)
{ … }

/* Process a deferred refcount update. */
STATIC int
xfs_refcount_update_finish_item(
	struct xfs_trans		*tp,
	struct xfs_log_item		*done,
	struct list_head		*item,
	struct xfs_btree_cur		**state)
{ … }

/* Clean up after calling xfs_refcount_finish_one. */
STATIC void
xfs_refcount_finish_one_cleanup(
	struct xfs_trans	*tp,
	struct xfs_btree_cur	*rcur,
	int			error)
{ … }

/* Abort all pending CUIs. */
STATIC void
xfs_refcount_update_abort_intent(
	struct xfs_log_item		*intent)
{ … }

/* Is this recovered CUI ok? */
static inline bool
xfs_cui_validate_phys(
	struct xfs_mount		*mp,
	struct xfs_phys_extent		*pmap)
{ … }

static inline void
xfs_cui_recover_work(
	struct xfs_mount		*mp,
	struct xfs_defer_pending	*dfp,
	struct xfs_phys_extent		*pmap)
{ … }

/*
 * Process a refcount update intent item that was recovered from the log.
 * We need to update the refcountbt.
 */
STATIC int
xfs_refcount_recover_work(
	struct xfs_defer_pending	*dfp,
	struct list_head		*capture_list)
{ … }

/* Relog an intent item to push the log tail forward. */
static struct xfs_log_item *
xfs_refcount_relog_intent(
	struct xfs_trans		*tp,
	struct xfs_log_item		*intent,
	struct xfs_log_item		*done_item)
{ … }

const struct xfs_defer_op_type xfs_refcount_update_defer_type = …;

STATIC bool
xfs_cui_item_match(
	struct xfs_log_item	*lip,
	uint64_t		intent_id)
{ … }

static const struct xfs_item_ops xfs_cui_item_ops = …;

static inline void
xfs_cui_copy_format(
	struct xfs_cui_log_format	*dst,
	const struct xfs_cui_log_format	*src)
{ … }

/*
 * This routine is called to create an in-core extent refcount update
 * item from the cui format structure which was logged on disk.
 * It allocates an in-core cui, copies the extents from the format
 * structure into it, and adds the cui to the AIL with the given
 * LSN.
 */
STATIC int
xlog_recover_cui_commit_pass2(
	struct xlog			*log,
	struct list_head		*buffer_list,
	struct xlog_recover_item	*item,
	xfs_lsn_t			lsn)
{ … }

const struct xlog_recover_item_ops xlog_cui_item_ops = …;

/*
 * This routine is called when an CUD format structure is found in a committed
 * transaction in the log. Its purpose is to cancel the corresponding CUI if it
 * was still in the log. To do this it searches the AIL for the CUI with an id
 * equal to that in the CUD format structure. If we find it we drop the CUD
 * reference, which removes the CUI from the AIL and frees it.
 */
STATIC int
xlog_recover_cud_commit_pass2(
	struct xlog			*log,
	struct list_head		*buffer_list,
	struct xlog_recover_item	*item,
	xfs_lsn_t			lsn)
{ … }

const struct xlog_recover_item_ops xlog_cud_item_ops = …;
linux/fs/xfs/xfs_refcount_item.c
