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xfs: add full xfs_dqblk verifier

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Add an xfs_dqblk verifier so that it can check the uuid on V5 filesystems;
it calls the existing xfs_dquot_verify verifier to validate the
xfs_disk_dquot_t contained inside it.  This lets us move the uuid
verification out of the crc verifier, which makes little sense.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Eric Sandeen 2018-05-07 09:20:18 -07:00 committed by Darrick J. Wong
parent 48fa1db87f
commit 7224fa482a
4 changed files with 30 additions and 11 deletions
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27
fs/xfs/libxfs/xfs_dquot_buf.c
View File

@ -41,7 +41,12 @@ xfs_calc_dquots_per_chunk(
/*
* Do some primitive error checking on ondisk dquot data structures.
*
* The xfs_dqblk structure /contains/ the xfs_disk_dquot structure;
* we verify them separately because at some points we have only the
* smaller xfs_disk_dquot structure available.
*/
xfs_failaddr_t
xfs_dquot_verify(
struct xfs_mount *mp,
@ -100,6 +105,20 @@ xfs_dquot_verify(
return NULL;
}
xfs_failaddr_t
xfs_dqblk_verify(
struct xfs_mount *mp,
struct xfs_dqblk *dqb,
xfs_dqid_t id,
uint type) /* used only during quotacheck */
{
if (xfs_sb_version_hascrc(&mp->m_sb) &&
!uuid_equal(&dqb->dd_uuid, &mp->m_sb.sb_meta_uuid))
return __this_address;
return xfs_dquot_verify(mp, &dqb->dd_diskdq, id, type);
}
/*
* Do some primitive error checking on ondisk dquot data structures.
*/
@ -156,8 +175,6 @@ xfs_dquot_buf_verify_crc(
if (!xfs_verify_cksum((char *)d, sizeof(struct xfs_dqblk),
XFS_DQUOT_CRC_OFF))
return false;
if (!uuid_equal(&d->dd_uuid, &mp->m_sb.sb_meta_uuid))
return false;
}
return true;
}
@ -167,7 +184,7 @@ xfs_dquot_buf_verify(
struct xfs_mount *mp,
struct xfs_buf *bp)
{
struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr;
struct xfs_dqblk *dqb = bp->b_addr;
xfs_failaddr_t fa;
xfs_dqid_t id = 0;
int ndquots;
@ -193,12 +210,12 @@ xfs_dquot_buf_verify(
for (i = 0; i < ndquots; i++) {
struct xfs_disk_dquot *ddq;
ddq = &d[i].dd_diskdq;
ddq = &dqb[i].dd_diskdq;
if (i == 0)
id = be32_to_cpu(ddq->d_id);
fa = xfs_dquot_verify(mp, ddq, id + i, 0);
fa = xfs_dqblk_verify(mp, &dqb[i], id + i, 0);
if (fa)
return fa;
}

2
fs/xfs/libxfs/xfs_quota_defs.h
View File

@ -153,6 +153,8 @@ typedef uint16_t xfs_qwarncnt_t;
extern xfs_failaddr_t xfs_dquot_verify(struct xfs_mount *mp,
struct xfs_disk_dquot *ddq, xfs_dqid_t id, uint type);
extern xfs_failaddr_t xfs_dqblk_verify(struct xfs_mount *mp,
struct xfs_dqblk *dqb, xfs_dqid_t id, uint type);
extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);
extern int xfs_dqblk_repair(struct xfs_mount *mp, struct xfs_dqblk *dqb,
xfs_dqid_t id, uint type);

10
fs/xfs/xfs_dquot.c
View File

@ -953,6 +953,7 @@ xfs_qm_dqflush(
{
struct xfs_mount *mp = dqp->q_mount;
struct xfs_buf *bp;
struct xfs_dqblk *dqb;
struct xfs_disk_dquot *ddqp;
xfs_failaddr_t fa;
int error;
@ -996,12 +997,13 @@ xfs_qm_dqflush(
/*
* Calculate the location of the dquot inside the buffer.
*/
ddqp = bp->b_addr + dqp->q_bufoffset;
dqb = bp->b_addr + dqp->q_bufoffset;
ddqp = &dqb->dd_diskdq;
/*
* A simple sanity check in case we got a corrupted dquot..
* A simple sanity check in case we got a corrupted dquot.
*/
fa = xfs_dquot_verify(mp, &dqp->q_core, be32_to_cpu(ddqp->d_id), 0);
fa = xfs_dqblk_verify(mp, dqb, be32_to_cpu(ddqp->d_id), 0);
if (fa) {
xfs_alert(mp, "corrupt dquot ID 0x%x in memory at %pS",
be32_to_cpu(ddqp->d_id), fa);
@ -1032,8 +1034,6 @@ xfs_qm_dqflush(
* of a dquot without an up-to-date CRC getting to disk.
*/
if (xfs_sb_version_hascrc(&mp->m_sb)) {
struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddqp;
dqb->dd_lsn = cpu_to_be64(dqp->q_logitem.qli_item.li_lsn);
xfs_update_cksum((char *)dqb, sizeof(struct xfs_dqblk),
XFS_DQUOT_CRC_OFF);

2
fs/xfs/xfs_qm.c
View File

@ -865,7 +865,7 @@ xfs_qm_reset_dqcounts(
* find uninitialised dquot blks. See comment in
* xfs_dquot_verify.
*/
fa = xfs_dquot_verify(mp, ddq, id + j, type);
fa = xfs_dqblk_verify(mp, &dqb[j], id + j, type);
if (fa)
xfs_dqblk_repair(mp, &dqb[j], id + j, type);