// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
* Copyright (c) 2013 Red Hat, 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_mount.h"
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_bmap.h"
#include "xfs_buf_item.h"
#include "xfs_dir2.h"
#include "xfs_dir2_priv.h"
#include "xfs_error.h"
#include "xfs_trace.h"
#include "xfs_log.h"
#include "xfs_health.h"
/*
* Local function prototypes.
*/
static void xfs_dir2_block_log_leaf(xfs_trans_t *tp, struct xfs_buf *bp,
int first, int last);
static void xfs_dir2_block_log_tail(xfs_trans_t *tp, struct xfs_buf *bp);
static int xfs_dir2_block_lookup_int(xfs_da_args_t *args, struct xfs_buf **bpp,
int *entno);
static int xfs_dir2_block_sort(const void *a, const void *b);
static xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot;
/*
* One-time startup routine called from xfs_init().
*/
void
xfs_dir_startup(void)
{
xfs_dir_hash_dot = xfs_da_hashname((unsigned char *)".", 1);
xfs_dir_hash_dotdot = xfs_da_hashname((unsigned char *)"..", 2);
}
static xfs_failaddr_t
xfs_dir3_block_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_mount;
struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
if (!xfs_verify_magic(bp, hdr3->magic))
return __this_address;
if (xfs_has_crc(mp)) {
if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
return __this_address;
if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp))
return __this_address;
if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
return __this_address;
}
return __xfs_dir3_data_check(NULL, bp);
}
static void
xfs_dir3_block_read_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_mount;
xfs_failaddr_t fa;
if (xfs_has_crc(mp) &&
!xfs_buf_verify_cksum(bp, XFS_DIR3_DATA_CRC_OFF))
xfs_verifier_error(bp, -EFSBADCRC, __this_address);
else {
fa = xfs_dir3_block_verify(bp);
if (fa)
xfs_verifier_error(bp, -EFSCORRUPTED, fa);
}
}
static void
xfs_dir3_block_write_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_mount;
struct xfs_buf_log_item *bip = bp->b_log_item;
struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
xfs_failaddr_t fa;
fa = xfs_dir3_block_verify(bp);
if (fa) {
xfs_verifier_error(bp, -EFSCORRUPTED, fa);
return;
}
if (!xfs_has_crc(mp))
return;
if (bip)
hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn);
xfs_buf_update_cksum(bp, XFS_DIR3_DATA_CRC_OFF);