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afs: Dump bad status record 

Dump an AFS FileStatus record that is detected as invalid.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2018-04-06 14:17:24 +01:00
parent 37ab636880
commit 888b338461
1 changed files with 35 additions and 0 deletions
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35
fs/afs/fsclient.c
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@ -43,6 +43,26 @@ static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
*_bp = bp;
}
/*
* Dump a bad file status record.
*/
static void xdr_dump_bad(const __be32 *bp)
{
__be32 x[4];
int i;
pr_notice("AFS XDR: Bad status record\n");
for (i = 0; i < 5 * 4 * 4; i += 16) {
memcpy(x, bp, 16);
bp += 4;
pr_notice("%03x: %08x %08x %08x %08x\n",
i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
}
memcpy(x, bp, 4);
pr_notice("0x50: %08x\n", ntohl(x[0]));
}
/*
* decode an AFSFetchStatus block
*/
@ -97,6 +117,20 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
EXTRACT(status->abort_code); /* spare 4 */
*_bp = bp;
switch (status->type) {
case AFS_FTYPE_FILE:
case AFS_FTYPE_DIR:
case AFS_FTYPE_SYMLINK:
break;
case AFS_FTYPE_INVALID:
if (status->abort_code != 0)
goto out;
/* Fall through */
default:
xdr_dump_bad(bp - 2);
goto out;
}
if (size != status->size) {
status->size = size;
changed |= true;
@ -145,6 +179,7 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
status->data_version = data_version;
}
out:
if (vnode)
write_sequnlock(&vnode->cb_lock);
}