xfs_bmap_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_inode.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_bmap_item.h"
#include "xfs_log.h"
#include "xfs_bmap.h"
#include "xfs_icache.h"
#include "xfs_bmap_btree.h"
#include "xfs_trans_space.h"
#include "xfs_error.h"
#include "xfs_log_priv.h"
#include "xfs_log_recover.h"
#include "xfs_ag.h"
#include "xfs_trace.h"

struct kmem_cache	*xfs_bui_cache;
struct kmem_cache	*xfs_bud_cache;

static const struct xfs_item_ops xfs_bui_item_ops;

static inline struct xfs_bui_log_item *BUI_ITEM(struct xfs_log_item *lip)
{ … }

STATIC void
xfs_bui_item_free(
	struct xfs_bui_log_item	*buip)
{ … }

/*
 * Freeing the BUI requires that we remove it from the AIL if it has already
 * been placed there. However, the BUI may not yet have been placed in the AIL
 * when called by xfs_bui_release() from BUD 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 BUI.
 */
STATIC void
xfs_bui_release(
	struct xfs_bui_log_item	*buip)
{ … }


STATIC void
xfs_bui_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 bui log item. We use only 1 iovec, and we point that
 * at the bui_log_format structure embedded in the bui item.
 * It is at this point that we assert that all of the extent
 * slots in the bui item have been filled.
 */
STATIC void
xfs_bui_item_format(
	struct xfs_log_item	*lip,
	struct xfs_log_vec	*lv)
{ … }

/*
 * The unpin operation is the last place an BUI 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 BUI transaction has been successfully committed to make it
 * this far. Therefore, we expect whoever committed the BUI to either construct
 * and commit the BUD or drop the BUD's reference in the event of error. Simply
 * drop the log's BUI reference now that the log is done with it.
 */
STATIC void
xfs_bui_item_unpin(
	struct xfs_log_item	*lip,
	int			remove)
{ … }

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

/*
 * Allocate and initialize an bui item with the given number of extents.
 */
STATIC struct xfs_bui_log_item *
xfs_bui_init(
	struct xfs_mount		*mp)

{ … }

static inline struct xfs_bud_log_item *BUD_ITEM(struct xfs_log_item *lip)
{ … }

STATIC void
xfs_bud_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 bud log item. We use only 1 iovec, and we point that
 * at the bud_log_format structure embedded in the bud item.
 * It is at this point that we assert that all of the extent
 * slots in the bud item have been filled.
 */
STATIC void
xfs_bud_item_format(
	struct xfs_log_item	*lip,
	struct xfs_log_vec	*lv)
{ … }

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

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

static const struct xfs_item_ops xfs_bud_item_ops = …;

static inline struct xfs_bmap_intent *bi_entry(const struct list_head *e)
{ … }

/* Sort bmap intents by inode. */
static int
xfs_bmap_update_diff_items(
	void				*priv,
	const struct list_head		*a,
	const struct list_head		*b)
{ … }

/* Log bmap updates in the intent item. */
STATIC void
xfs_bmap_update_log_item(
	struct xfs_trans		*tp,
	struct xfs_bui_log_item		*buip,
	struct xfs_bmap_intent		*bi)
{ … }

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

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

/* Take a passive ref to the AG containing the space we're mapping. */
static inline void
xfs_bmap_update_get_group(
	struct xfs_mount	*mp,
	struct xfs_bmap_intent	*bi)
{ … }

/* Add this deferred BUI to the transaction. */
void
xfs_bmap_defer_add(
	struct xfs_trans	*tp,
	struct xfs_bmap_intent	*bi)
{ … }

/* Release a passive AG ref after finishing mapping work. */
static inline void
xfs_bmap_update_put_group(
	struct xfs_bmap_intent	*bi)
{ … }

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

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

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

/* Is this recovered BUI ok? */
static inline bool
xfs_bui_validate(
	struct xfs_mount		*mp,
	struct xfs_bui_log_item		*buip)
{ … }

static inline struct xfs_bmap_intent *
xfs_bui_recover_work(
	struct xfs_mount		*mp,
	struct xfs_defer_pending	*dfp,
	struct xfs_inode		**ipp,
	struct xfs_map_extent		*map)
{ … }

/*
 * Process a bmap update intent item that was recovered from the log.
 * We need to update some inode's bmbt.
 */
STATIC int
xfs_bmap_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_bmap_relog_intent(
	struct xfs_trans		*tp,
	struct xfs_log_item		*intent,
	struct xfs_log_item		*done_item)
{ … }

const struct xfs_defer_op_type xfs_bmap_update_defer_type = …;

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

static const struct xfs_item_ops xfs_bui_item_ops = …;

static inline void
xfs_bui_copy_format(
	struct xfs_bui_log_format	*dst,
	const struct xfs_bui_log_format	*src)
{ … }

/*
 * This routine is called to create an in-core extent bmap update
 * item from the bui format structure which was logged on disk.
 * It allocates an in-core bui, copies the extents from the format
 * structure into it, and adds the bui to the AIL with the given
 * LSN.
 */
STATIC int
xlog_recover_bui_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_bui_item_ops = …;

/*
 * This routine is called when an BUD format structure is found in a committed
 * transaction in the log. Its purpose is to cancel the corresponding BUI if it
 * was still in the log. To do this it searches the AIL for the BUI with an id
 * equal to that in the BUD format structure. If we find it we drop the BUD
 * reference, which removes the BUI from the AIL and frees it.
 */
STATIC int
xlog_recover_bud_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_bud_item_ops = …;
linux/fs/xfs/xfs_bmap_item.c
