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xfs: rework the inline directory verifiers

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The inline directory verifiers should be called on the inode fork data,
which means after iformat_local on the read side, and prior to
ifork_flush on the write side.  This makes the fork verifier more
consistent with the way buffer verifiers work -- i.e. they will operate
on the memory buffer that the code will be reading and writing directly.

Furthermore, revise the verifier function to return -EFSCORRUPTED so
that we don't flood the logs with corruption messages and assert
notices.  This has been a particular problem with xfs/348, which
triggers the XFS_WANT_CORRUPTED_RETURN assertions, which halts the
kernel when CONFIG_XFS_DEBUG=y.  Disk corruption isn't supposed to do
that, at least not in a verifier.

Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
v2: get the inode d_ops the proper way
v3: describe the bug that this patch fixes; no code changes
This commit is contained in:
Darrick J. Wong 2017-03-28 14:51:10 -07:00
parent c02ed2e75e
commit 005c5db8fd
5 changed files with 66 additions and 56 deletions
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19
fs/xfs/xfs_inode.c
View file

@ -50,6 +50,7 @@
#include "xfs_log.h"
#include "xfs_bmap_btree.h"
#include "xfs_reflink.h"
#include "xfs_dir2_priv.h"
kmem_zone_t *xfs_inode_zone;
@ -3475,7 +3476,6 @@ xfs_iflush_int(
struct xfs_inode_log_item *iip = ip->i_itemp;
struct xfs_dinode *dip;
struct xfs_mount *mp = ip->i_mount;
int error;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
ASSERT(xfs_isiflocked(ip));
@ -3547,6 +3547,12 @@ xfs_iflush_int(
if (ip->i_d.di_version < 3)
ip->i_d.di_flushiter++;
/* Check the inline directory data. */
if (S_ISDIR(VFS_I(ip)->i_mode) &&
ip->i_d.di_format == XFS_DINODE_FMT_LOCAL &&
xfs_dir2_sf_verify(ip))
goto corrupt_out;
/*
* Copy the dirty parts of the inode into the on-disk inode. We always
* copy out the core of the inode, because if the inode is dirty at all
@ -3558,14 +3564,9 @@ xfs_iflush_int(
if (ip->i_d.di_flushiter == DI_MAX_FLUSH)
ip->i_d.di_flushiter = 0;
error = xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK);
if (error)
return error;
if (XFS_IFORK_Q(ip)) {
error = xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK);
if (error)
return error;
}
xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK);
if (XFS_IFORK_Q(ip))
xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK);
xfs_inobp_check(mp, bp);
/*