Release 4.18 fs/xfs/libxfs/xfs_types.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
* Copyright (C) 2017 Oracle.
* All Rights Reserved.
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_shared.h"
#include "xfs_trans_resv.h"
#include "xfs_bit.h"
#include "xfs_sb.h"
#include "xfs_mount.h"
#include "xfs_defer.h"
#include "xfs_inode.h"
#include "xfs_btree.h"
#include "xfs_rmap.h"
#include "xfs_alloc_btree.h"
#include "xfs_alloc.h"
#include "xfs_ialloc.h"
/* Find the size of the AG, in blocks. */
xfs_agblock_t
xfs_ag_block_count(
struct xfs_mount *mp,
xfs_agnumber_t agno)
{
ASSERT(agno < mp->m_sb.sb_agcount);
if (agno < mp->m_sb.sb_agcount - 1)
return mp->m_sb.sb_agblocks;
return mp->m_sb.sb_dblocks - (agno * mp->m_sb.sb_agblocks);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 60 | 100.00% | 1 | 100.00% |
| Total | 60 | 100.00% | 1 | 100.00% |
/*
* Verify that an AG block number pointer neither points outside the AG
* nor points at static metadata.
*/
bool
xfs_verify_agbno(
struct xfs_mount *mp,
xfs_agnumber_t agno,
xfs_agblock_t agbno)
{
xfs_agblock_t eoag;
eoag = xfs_ag_block_count(mp, agno);
if (agbno >= eoag)
return false;
if (agbno <= XFS_AGFL_BLOCK(mp))
return false;
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 52 | 100.00% | 1 | 100.00% |
| Total | 52 | 100.00% | 1 | 100.00% |
/*
* Verify that an FS block number pointer neither points outside the
* filesystem nor points at static AG metadata.
*/
bool
xfs_verify_fsbno(
struct xfs_mount *mp,
xfs_fsblock_t fsbno)
{
xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, fsbno);
if (agno >= mp->m_sb.sb_agcount)
return false;
return xfs_verify_agbno(mp, agno, XFS_FSB_TO_AGBNO(mp, fsbno));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 51 | 100.00% | 1 | 100.00% |
| Total | 51 | 100.00% | 1 | 100.00% |
/* Calculate the first and last possible inode number in an AG. */
void
xfs_agino_range(
struct xfs_mount *mp,
xfs_agnumber_t agno,
xfs_agino_t *first,
xfs_agino_t *last)
{
xfs_agblock_t bno;
xfs_agblock_t eoag;
eoag = xfs_ag_block_count(mp, agno);
/*
* Calculate the first inode, which will be in the first
* cluster-aligned block after the AGFL.
*/
bno = round_up(XFS_AGFL_BLOCK(mp) + 1,
xfs_ialloc_cluster_alignment(mp));
*first = XFS_OFFBNO_TO_AGINO(mp, bno, 0);
/*
* Calculate the last inode, which will be at the end of the
* last (aligned) cluster that can be allocated in the AG.
*/
bno = round_down(eoag, xfs_ialloc_cluster_alignment(mp));
*last = XFS_OFFBNO_TO_AGINO(mp, bno, 0) - 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 93 | 100.00% | 1 | 100.00% |
| Total | 93 | 100.00% | 1 | 100.00% |
/*
* Verify that an AG inode number pointer neither points outside the AG
* nor points at static metadata.
*/
bool
xfs_verify_agino(
struct xfs_mount *mp,
xfs_agnumber_t agno,
xfs_agino_t agino)
{
xfs_agino_t first;
xfs_agino_t last;
xfs_agino_range(mp, agno, &first, &last);
return agino >= first && agino <= last;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 44 | 100.00% | 1 | 100.00% |
| Total | 44 | 100.00% | 1 | 100.00% |
/*
* Verify that an FS inode number pointer neither points outside the
* filesystem nor points at static AG metadata.
*/
bool
xfs_verify_ino(
struct xfs_mount *mp,
xfs_ino_t ino)
{
xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, ino);
xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ino);
if (agno >= mp->m_sb.sb_agcount)
return false;
if (XFS_AGINO_TO_INO(mp, agno, agino) != ino)
return false;
return xfs_verify_agino(mp, agno, agino);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 72 | 100.00% | 1 | 100.00% |
| Total | 72 | 100.00% | 1 | 100.00% |
/* Is this an internal inode number? */
bool
xfs_internal_inum(
struct xfs_mount *mp,
xfs_ino_t ino)
{
return ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
(xfs_sb_version_hasquota(&mp->m_sb) &&
xfs_is_quota_inode(&mp->m_sb, ino));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 50 | 100.00% | 1 | 100.00% |
| Total | 50 | 100.00% | 1 | 100.00% |
/*
* Verify that a directory entry's inode number doesn't point at an internal
* inode, empty space, or static AG metadata.
*/
bool
xfs_verify_dir_ino(
struct xfs_mount *mp,
xfs_ino_t ino)
{
if (xfs_internal_inum(mp, ino))
return false;
return xfs_verify_ino(mp, ino);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
/*
* Verify that an realtime block number pointer doesn't point off the
* end of the realtime device.
*/
bool
xfs_verify_rtbno(
struct xfs_mount *mp,
xfs_rtblock_t rtbno)
{
return rtbno < mp->m_sb.sb_rblocks;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Chinner | 536 | 100.00% | 1 | 100.00% |
| Total | 536 | 100.00% | 1 | 100.00% |
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