linux/fs/xfs/scrub/bmap.c
Darrick J. Wong eb0efe5063 xfs: don't eat an EIO/ENOSPC writeback error when scrubbing data fork
The data fork scrubber calls filemap_write_and_wait to flush dirty pages
and delalloc reservations out to disk prior to checking the data fork's
extent mappings.  Unfortunately, this means that scrub can consume the
EIO/ENOSPC errors that would otherwise have stayed around in the address
space until (we hope) the writer application calls fsync to persist data
and collect errors.  The end result is that programs that wrote to a
file might never see the error code and proceed as if nothing were
wrong.

xfs_scrub is not in a position to notify file writers about the
writeback failure, and it's only here to check metadata, not file
contents.  Therefore, if writeback fails, we should stuff the error code
back into the address space so that an fsync by the writer application
can pick that up.

Fixes: 99d9d8d05d ("xfs: scrub inode block mappings")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
2020-07-06 10:46:56 -07:00

766 lines
20 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_btree.h"
#include "xfs_bit.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_inode.h"
#include "xfs_alloc.h"
#include "xfs_bmap.h"
#include "xfs_bmap_btree.h"
#include "xfs_rmap.h"
#include "xfs_rmap_btree.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/btree.h"
/* Set us up with an inode's bmap. */
int
xchk_setup_inode_bmap(
struct xfs_scrub *sc,
struct xfs_inode *ip)
{
int error;
error = xchk_get_inode(sc, ip);
if (error)
goto out;
sc->ilock_flags = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
xfs_ilock(sc->ip, sc->ilock_flags);
/*
* We don't want any ephemeral data fork updates sitting around
* while we inspect block mappings, so wait for directio to finish
* and flush dirty data if we have delalloc reservations.
*/
if (S_ISREG(VFS_I(sc->ip)->i_mode) &&
sc->sm->sm_type == XFS_SCRUB_TYPE_BMBTD) {
struct address_space *mapping = VFS_I(sc->ip)->i_mapping;
inode_dio_wait(VFS_I(sc->ip));
/*
* Try to flush all incore state to disk before we examine the
* space mappings for the data fork. Leave accumulated errors
* in the mapping for the writer threads to consume.
*
* On ENOSPC or EIO writeback errors, we continue into the
* extent mapping checks because write failures do not
* necessarily imply anything about the correctness of the file
* metadata. The metadata and the file data could be on
* completely separate devices; a media failure might only
* affect a subset of the disk, etc. We can handle delalloc
* extents in the scrubber, so leaving them in memory is fine.
*/
error = filemap_fdatawrite(mapping);
if (!error)
error = filemap_fdatawait_keep_errors(mapping);
if (error && (error != -ENOSPC && error != -EIO))
goto out;
}
/* Got the inode, lock it and we're ready to go. */
error = xchk_trans_alloc(sc, 0);
if (error)
goto out;
sc->ilock_flags |= XFS_ILOCK_EXCL;
xfs_ilock(sc->ip, XFS_ILOCK_EXCL);
out:
/* scrub teardown will unlock and release the inode */
return error;
}
/*
* Inode fork block mapping (BMBT) scrubber.
* More complex than the others because we have to scrub
* all the extents regardless of whether or not the fork
* is in btree format.
*/
struct xchk_bmap_info {
struct xfs_scrub *sc;
xfs_fileoff_t lastoff;
bool is_rt;
bool is_shared;
bool was_loaded;
int whichfork;
};
/* Look for a corresponding rmap for this irec. */
static inline bool
xchk_bmap_get_rmap(
struct xchk_bmap_info *info,
struct xfs_bmbt_irec *irec,
xfs_agblock_t agbno,
uint64_t owner,
struct xfs_rmap_irec *rmap)
{
xfs_fileoff_t offset;
unsigned int rflags = 0;
int has_rmap;
int error;
if (info->whichfork == XFS_ATTR_FORK)
rflags |= XFS_RMAP_ATTR_FORK;
/*
* CoW staging extents are owned (on disk) by the refcountbt, so
* their rmaps do not have offsets.
*/
if (info->whichfork == XFS_COW_FORK)
offset = 0;
else
offset = irec->br_startoff;
/*
* If the caller thinks this could be a shared bmbt extent (IOWs,
* any data fork extent of a reflink inode) then we have to use the
* range rmap lookup to make sure we get the correct owner/offset.
*/
if (info->is_shared) {
error = xfs_rmap_lookup_le_range(info->sc->sa.rmap_cur, agbno,
owner, offset, rflags, rmap, &has_rmap);
if (!xchk_should_check_xref(info->sc, &error,
&info->sc->sa.rmap_cur))
return false;
goto out;
}
/*
* Otherwise, use the (faster) regular lookup.
*/
error = xfs_rmap_lookup_le(info->sc->sa.rmap_cur, agbno, 0, owner,
offset, rflags, &has_rmap);
if (!xchk_should_check_xref(info->sc, &error,
&info->sc->sa.rmap_cur))
return false;
if (!has_rmap)
goto out;
error = xfs_rmap_get_rec(info->sc->sa.rmap_cur, rmap, &has_rmap);
if (!xchk_should_check_xref(info->sc, &error,
&info->sc->sa.rmap_cur))
return false;
out:
if (!has_rmap)
xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
return has_rmap;
}
/* Make sure that we have rmapbt records for this extent. */
STATIC void
xchk_bmap_xref_rmap(
struct xchk_bmap_info *info,
struct xfs_bmbt_irec *irec,
xfs_agblock_t agbno)
{
struct xfs_rmap_irec rmap;
unsigned long long rmap_end;
uint64_t owner;
if (!info->sc->sa.rmap_cur || xchk_skip_xref(info->sc->sm))
return;
if (info->whichfork == XFS_COW_FORK)
owner = XFS_RMAP_OWN_COW;
else
owner = info->sc->ip->i_ino;
/* Find the rmap record for this irec. */
if (!xchk_bmap_get_rmap(info, irec, agbno, owner, &rmap))
return;
/* Check the rmap. */
rmap_end = (unsigned long long)rmap.rm_startblock + rmap.rm_blockcount;
if (rmap.rm_startblock > agbno ||
agbno + irec->br_blockcount > rmap_end)
xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
/*
* Check the logical offsets if applicable. CoW staging extents
* don't track logical offsets since the mappings only exist in
* memory.
*/
if (info->whichfork != XFS_COW_FORK) {
rmap_end = (unsigned long long)rmap.rm_offset +
rmap.rm_blockcount;
if (rmap.rm_offset > irec->br_startoff ||
irec->br_startoff + irec->br_blockcount > rmap_end)
xchk_fblock_xref_set_corrupt(info->sc,
info->whichfork, irec->br_startoff);
}
if (rmap.rm_owner != owner)
xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
/*
* Check for discrepancies between the unwritten flag in the irec and
* the rmap. Note that the (in-memory) CoW fork distinguishes between
* unwritten and written extents, but we don't track that in the rmap
* records because the blocks are owned (on-disk) by the refcountbt,
* which doesn't track unwritten state.
*/
if (owner != XFS_RMAP_OWN_COW &&
irec->br_state == XFS_EXT_UNWRITTEN &&
!(rmap.rm_flags & XFS_RMAP_UNWRITTEN))
xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
if (info->whichfork == XFS_ATTR_FORK &&
!(rmap.rm_flags & XFS_RMAP_ATTR_FORK))
xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
if (rmap.rm_flags & XFS_RMAP_BMBT_BLOCK)
xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
}
/* Cross-reference a single rtdev extent record. */
STATIC void
xchk_bmap_rt_iextent_xref(
struct xfs_inode *ip,
struct xchk_bmap_info *info,
struct xfs_bmbt_irec *irec)
{
xchk_xref_is_used_rt_space(info->sc, irec->br_startblock,
irec->br_blockcount);
}
/* Cross-reference a single datadev extent record. */
STATIC void
xchk_bmap_iextent_xref(
struct xfs_inode *ip,
struct xchk_bmap_info *info,
struct xfs_bmbt_irec *irec)
{
struct xfs_mount *mp = info->sc->mp;
xfs_agnumber_t agno;
xfs_agblock_t agbno;
xfs_extlen_t len;
int error;
agno = XFS_FSB_TO_AGNO(mp, irec->br_startblock);
agbno = XFS_FSB_TO_AGBNO(mp, irec->br_startblock);
len = irec->br_blockcount;
error = xchk_ag_init(info->sc, agno, &info->sc->sa);
if (!xchk_fblock_process_error(info->sc, info->whichfork,
irec->br_startoff, &error))
return;
xchk_xref_is_used_space(info->sc, agbno, len);
xchk_xref_is_not_inode_chunk(info->sc, agbno, len);
xchk_bmap_xref_rmap(info, irec, agbno);
switch (info->whichfork) {
case XFS_DATA_FORK:
if (xfs_is_reflink_inode(info->sc->ip))
break;
/* fall through */
case XFS_ATTR_FORK:
xchk_xref_is_not_shared(info->sc, agbno,
irec->br_blockcount);
break;
case XFS_COW_FORK:
xchk_xref_is_cow_staging(info->sc, agbno,
irec->br_blockcount);
break;
}
xchk_ag_free(info->sc, &info->sc->sa);
}
/*
* Directories and attr forks should never have blocks that can't be addressed
* by a xfs_dablk_t.
*/
STATIC void
xchk_bmap_dirattr_extent(
struct xfs_inode *ip,
struct xchk_bmap_info *info,
struct xfs_bmbt_irec *irec)
{
struct xfs_mount *mp = ip->i_mount;
xfs_fileoff_t off;
if (!S_ISDIR(VFS_I(ip)->i_mode) && info->whichfork != XFS_ATTR_FORK)
return;
if (!xfs_verify_dablk(mp, irec->br_startoff))
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
off = irec->br_startoff + irec->br_blockcount - 1;
if (!xfs_verify_dablk(mp, off))
xchk_fblock_set_corrupt(info->sc, info->whichfork, off);
}
/* Scrub a single extent record. */
STATIC int
xchk_bmap_iextent(
struct xfs_inode *ip,
struct xchk_bmap_info *info,
struct xfs_bmbt_irec *irec)
{
struct xfs_mount *mp = info->sc->mp;
xfs_filblks_t end;
int error = 0;
/*
* Check for out-of-order extents. This record could have come
* from the incore list, for which there is no ordering check.
*/
if (irec->br_startoff < info->lastoff)
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
xchk_bmap_dirattr_extent(ip, info, irec);
/* There should never be a "hole" extent in either extent list. */
if (irec->br_startblock == HOLESTARTBLOCK)
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
/*
* Check for delalloc extents. We never iterate the ones in the
* in-core extent scan, and we should never see these in the bmbt.
*/
if (isnullstartblock(irec->br_startblock))
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
/* Make sure the extent points to a valid place. */
if (irec->br_blockcount > MAXEXTLEN)
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
if (irec->br_startblock + irec->br_blockcount <= irec->br_startblock)
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
end = irec->br_startblock + irec->br_blockcount - 1;
if (info->is_rt &&
(!xfs_verify_rtbno(mp, irec->br_startblock) ||
!xfs_verify_rtbno(mp, end)))
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
if (!info->is_rt &&
(!xfs_verify_fsbno(mp, irec->br_startblock) ||
!xfs_verify_fsbno(mp, end) ||
XFS_FSB_TO_AGNO(mp, irec->br_startblock) !=
XFS_FSB_TO_AGNO(mp, end)))
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
/* We don't allow unwritten extents on attr forks. */
if (irec->br_state == XFS_EXT_UNWRITTEN &&
info->whichfork == XFS_ATTR_FORK)
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
if (info->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return 0;
if (info->is_rt)
xchk_bmap_rt_iextent_xref(ip, info, irec);
else
xchk_bmap_iextent_xref(ip, info, irec);
info->lastoff = irec->br_startoff + irec->br_blockcount;
return error;
}
/* Scrub a bmbt record. */
STATIC int
xchk_bmapbt_rec(
struct xchk_btree *bs,
union xfs_btree_rec *rec)
{
struct xfs_bmbt_irec irec;
struct xfs_bmbt_irec iext_irec;
struct xfs_iext_cursor icur;
struct xchk_bmap_info *info = bs->private;
struct xfs_inode *ip = bs->cur->bc_ino.ip;
struct xfs_buf *bp = NULL;
struct xfs_btree_block *block;
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, info->whichfork);
uint64_t owner;
int i;
/*
* Check the owners of the btree blocks up to the level below
* the root since the verifiers don't do that.
*/
if (xfs_sb_version_hascrc(&bs->cur->bc_mp->m_sb) &&
bs->cur->bc_ptrs[0] == 1) {
for (i = 0; i < bs->cur->bc_nlevels - 1; i++) {
block = xfs_btree_get_block(bs->cur, i, &bp);
owner = be64_to_cpu(block->bb_u.l.bb_owner);
if (owner != ip->i_ino)
xchk_fblock_set_corrupt(bs->sc,
info->whichfork, 0);
}
}
/*
* Check that the incore extent tree contains an extent that matches
* this one exactly. We validate those cached bmaps later, so we don't
* need to check them here. If the incore extent tree was just loaded
* from disk by the scrubber, we assume that its contents match what's
* on disk (we still hold the ILOCK) and skip the equivalence check.
*/
if (!info->was_loaded)
return 0;
xfs_bmbt_disk_get_all(&rec->bmbt, &irec);
if (!xfs_iext_lookup_extent(ip, ifp, irec.br_startoff, &icur,
&iext_irec) ||
irec.br_startoff != iext_irec.br_startoff ||
irec.br_startblock != iext_irec.br_startblock ||
irec.br_blockcount != iext_irec.br_blockcount ||
irec.br_state != iext_irec.br_state)
xchk_fblock_set_corrupt(bs->sc, info->whichfork,
irec.br_startoff);
return 0;
}
/* Scan the btree records. */
STATIC int
xchk_bmap_btree(
struct xfs_scrub *sc,
int whichfork,
struct xchk_bmap_info *info)
{
struct xfs_owner_info oinfo;
struct xfs_ifork *ifp = XFS_IFORK_PTR(sc->ip, whichfork);
struct xfs_mount *mp = sc->mp;
struct xfs_inode *ip = sc->ip;
struct xfs_btree_cur *cur;
int error;
/* Load the incore bmap cache if it's not loaded. */
info->was_loaded = ifp->if_flags & XFS_IFEXTENTS;
if (!info->was_loaded) {
error = xfs_iread_extents(sc->tp, ip, whichfork);
if (!xchk_fblock_process_error(sc, whichfork, 0, &error))
goto out;
}
/* Check the btree structure. */
cur = xfs_bmbt_init_cursor(mp, sc->tp, ip, whichfork);
xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, whichfork);
error = xchk_btree(sc, cur, xchk_bmapbt_rec, &oinfo, info);
xfs_btree_del_cursor(cur, error);
out:
return error;
}
struct xchk_bmap_check_rmap_info {
struct xfs_scrub *sc;
int whichfork;
struct xfs_iext_cursor icur;
};
/* Can we find bmaps that fit this rmap? */
STATIC int
xchk_bmap_check_rmap(
struct xfs_btree_cur *cur,
struct xfs_rmap_irec *rec,
void *priv)
{
struct xfs_bmbt_irec irec;
struct xchk_bmap_check_rmap_info *sbcri = priv;
struct xfs_ifork *ifp;
struct xfs_scrub *sc = sbcri->sc;
bool have_map;
/* Is this even the right fork? */
if (rec->rm_owner != sc->ip->i_ino)
return 0;
if ((sbcri->whichfork == XFS_ATTR_FORK) ^
!!(rec->rm_flags & XFS_RMAP_ATTR_FORK))
return 0;
if (rec->rm_flags & XFS_RMAP_BMBT_BLOCK)
return 0;
/* Now look up the bmbt record. */
ifp = XFS_IFORK_PTR(sc->ip, sbcri->whichfork);
if (!ifp) {
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
rec->rm_offset);
goto out;
}
have_map = xfs_iext_lookup_extent(sc->ip, ifp, rec->rm_offset,
&sbcri->icur, &irec);
if (!have_map)
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
rec->rm_offset);
/*
* bmap extent record lengths are constrained to 2^21 blocks in length
* because of space constraints in the on-disk metadata structure.
* However, rmap extent record lengths are constrained only by AG
* length, so we have to loop through the bmbt to make sure that the
* entire rmap is covered by bmbt records.
*/
while (have_map) {
if (irec.br_startoff != rec->rm_offset)
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
rec->rm_offset);
if (irec.br_startblock != XFS_AGB_TO_FSB(sc->mp,
cur->bc_ag.agno, rec->rm_startblock))
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
rec->rm_offset);
if (irec.br_blockcount > rec->rm_blockcount)
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
rec->rm_offset);
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
break;
rec->rm_startblock += irec.br_blockcount;
rec->rm_offset += irec.br_blockcount;
rec->rm_blockcount -= irec.br_blockcount;
if (rec->rm_blockcount == 0)
break;
have_map = xfs_iext_next_extent(ifp, &sbcri->icur, &irec);
if (!have_map)
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
rec->rm_offset);
}
out:
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return -ECANCELED;
return 0;
}
/* Make sure each rmap has a corresponding bmbt entry. */
STATIC int
xchk_bmap_check_ag_rmaps(
struct xfs_scrub *sc,
int whichfork,
xfs_agnumber_t agno)
{
struct xchk_bmap_check_rmap_info sbcri;
struct xfs_btree_cur *cur;
struct xfs_buf *agf;
int error;
error = xfs_alloc_read_agf(sc->mp, sc->tp, agno, 0, &agf);
if (error)
return error;
cur = xfs_rmapbt_init_cursor(sc->mp, sc->tp, agf, agno);
if (!cur) {
error = -ENOMEM;
goto out_agf;
}
sbcri.sc = sc;
sbcri.whichfork = whichfork;
error = xfs_rmap_query_all(cur, xchk_bmap_check_rmap, &sbcri);
if (error == -ECANCELED)
error = 0;
xfs_btree_del_cursor(cur, error);
out_agf:
xfs_trans_brelse(sc->tp, agf);
return error;
}
/* Make sure each rmap has a corresponding bmbt entry. */
STATIC int
xchk_bmap_check_rmaps(
struct xfs_scrub *sc,
int whichfork)
{
struct xfs_ifork *ifp = XFS_IFORK_PTR(sc->ip, whichfork);
xfs_agnumber_t agno;
bool zero_size;
int error;
if (!xfs_sb_version_hasrmapbt(&sc->mp->m_sb) ||
whichfork == XFS_COW_FORK ||
(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
return 0;
/* Don't support realtime rmap checks yet. */
if (XFS_IS_REALTIME_INODE(sc->ip) && whichfork == XFS_DATA_FORK)
return 0;
ASSERT(XFS_IFORK_PTR(sc->ip, whichfork) != NULL);
/*
* Only do this for complex maps that are in btree format, or for
* situations where we would seem to have a size but zero extents.
* The inode repair code can zap broken iforks, which means we have
* to flag this bmap as corrupt if there are rmaps that need to be
* reattached.
*/
if (whichfork == XFS_DATA_FORK)
zero_size = i_size_read(VFS_I(sc->ip)) == 0;
else
zero_size = false;
if (ifp->if_format != XFS_DINODE_FMT_BTREE &&
(zero_size || ifp->if_nextents > 0))
return 0;
for (agno = 0; agno < sc->mp->m_sb.sb_agcount; agno++) {
error = xchk_bmap_check_ag_rmaps(sc, whichfork, agno);
if (error)
return error;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
break;
}
return 0;
}
/*
* Scrub an inode fork's block mappings.
*
* First we scan every record in every btree block, if applicable.
* Then we unconditionally scan the incore extent cache.
*/
STATIC int
xchk_bmap(
struct xfs_scrub *sc,
int whichfork)
{
struct xfs_bmbt_irec irec;
struct xchk_bmap_info info = { NULL };
struct xfs_mount *mp = sc->mp;
struct xfs_inode *ip = sc->ip;
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
xfs_fileoff_t endoff;
struct xfs_iext_cursor icur;
int error = 0;
/* Non-existent forks can be ignored. */
if (!ifp)
goto out;
info.is_rt = whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip);
info.whichfork = whichfork;
info.is_shared = whichfork == XFS_DATA_FORK && xfs_is_reflink_inode(ip);
info.sc = sc;
switch (whichfork) {
case XFS_COW_FORK:
/* No CoW forks on non-reflink inodes/filesystems. */
if (!xfs_is_reflink_inode(ip)) {
xchk_ino_set_corrupt(sc, sc->ip->i_ino);
goto out;
}
break;
case XFS_ATTR_FORK:
if (!xfs_sb_version_hasattr(&mp->m_sb) &&
!xfs_sb_version_hasattr2(&mp->m_sb))
xchk_ino_set_corrupt(sc, sc->ip->i_ino);
break;
default:
ASSERT(whichfork == XFS_DATA_FORK);
break;
}
/* Check the fork values */
switch (ifp->if_format) {
case XFS_DINODE_FMT_UUID:
case XFS_DINODE_FMT_DEV:
case XFS_DINODE_FMT_LOCAL:
/* No mappings to check. */
goto out;
case XFS_DINODE_FMT_EXTENTS:
if (!(ifp->if_flags & XFS_IFEXTENTS)) {
xchk_fblock_set_corrupt(sc, whichfork, 0);
goto out;
}
break;
case XFS_DINODE_FMT_BTREE:
if (whichfork == XFS_COW_FORK) {
xchk_fblock_set_corrupt(sc, whichfork, 0);
goto out;
}
error = xchk_bmap_btree(sc, whichfork, &info);
if (error)
goto out;
break;
default:
xchk_fblock_set_corrupt(sc, whichfork, 0);
goto out;
}
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
goto out;
/* Find the offset of the last extent in the mapping. */
error = xfs_bmap_last_offset(ip, &endoff, whichfork);
if (!xchk_fblock_process_error(sc, whichfork, 0, &error))
goto out;
/* Scrub extent records. */
info.lastoff = 0;
ifp = XFS_IFORK_PTR(ip, whichfork);
for_each_xfs_iext(ifp, &icur, &irec) {
if (xchk_should_terminate(sc, &error) ||
(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
goto out;
if (isnullstartblock(irec.br_startblock))
continue;
if (irec.br_startoff >= endoff) {
xchk_fblock_set_corrupt(sc, whichfork,
irec.br_startoff);
goto out;
}
error = xchk_bmap_iextent(ip, &info, &irec);
if (error)
goto out;
}
error = xchk_bmap_check_rmaps(sc, whichfork);
if (!xchk_fblock_xref_process_error(sc, whichfork, 0, &error))
goto out;
out:
return error;
}
/* Scrub an inode's data fork. */
int
xchk_bmap_data(
struct xfs_scrub *sc)
{
return xchk_bmap(sc, XFS_DATA_FORK);
}
/* Scrub an inode's attr fork. */
int
xchk_bmap_attr(
struct xfs_scrub *sc)
{
return xchk_bmap(sc, XFS_ATTR_FORK);
}
/* Scrub an inode's CoW fork. */
int
xchk_bmap_cow(
struct xfs_scrub *sc)
{
if (!xfs_is_reflink_inode(sc->ip))
return -ENOENT;
return xchk_bmap(sc, XFS_COW_FORK);
}