// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#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_bit.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_bmap.h"
#include "xfs_bmap_btree.h"
#include "xfs_trans_space.h"
#include "xfs_trans.h"
#include "xfs_rtalloc.h"
#include "xfs_error.h"
#include "xfs_rtbitmap.h"
#include "xfs_health.h"
#include "xfs_sb.h"
/*
* Realtime allocator bitmap functions shared with userspace.
*/
/*
* Real time buffers need verifiers to avoid runtime warnings during IO.
* We don't have anything to verify, however, so these are just dummy
* operations.
*/
static void
xfs_rtbuf_verify_read(
struct xfs_buf *bp)
{
return;
}
static void
xfs_rtbuf_verify_write(
struct xfs_buf *bp)
{
return;
}
const struct xfs_buf_ops xfs_rtbuf_ops = {
.name = "rtbuf",
.verify_read = xfs_rtbuf_verify_read,
.verify_write = xfs_rtbuf_verify_write,
};
/* Release cached rt bitmap and summary buffers. */
void
xfs_rtbuf_cache_relse(
struct xfs_rtalloc_args *args)
{
if (args->rbmbp) {
xfs_trans_brelse(args->tp, args->rbmbp);
args->rbmbp = NULL;
args->rbmoff = NULLFILEOFF;
}
if (args->sumbp) {
xfs_trans_brelse(args->tp, args->sumbp);
args->sumbp = NULL;
args->sumoff = NULLFILEOFF;
}
}
/*
* Get a buffer for the bitmap or summary file block specified.
* The buffer is returned read and locked.
*/
static int
xfs_rtbuf_get(
struct xfs_rtalloc_args *args,
xfs_fileoff_t block, /* block number in bitmap or summary */
int issum) /* is summary not bitmap */
{
struct xfs_mount *mp = args->mp;
struct xfs_buf **cbpp; /* cached block buffer */
xfs_fileoff_t *coffp; /* cached block number */
struct xfs_buf *bp; /* block buffer, result */
struct xfs_inode *ip; /* bitmap or summary inode */
struct xfs_bmbt_irec map;
enum xfs_blft type;
int nmap = 1;
int error;
if (issum) {
cbpp = &args->sumbp;
coffp = &args->sumoff;
ip = args->rtg->rtg_inodes[XFS_RTGI_SUMMARY];
type = XFS_BLFT_RTSUMMARY_BUF