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Subject[PATCH 07/20] afs: Dump bad status record
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Date
Dump an AFS FileStatus record that is detected as invalid.

Signed-off-by: David Howells <dhowells@redhat.com>
---

fs/afs/fsclient.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)

diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 75554ee98d02..90aa3eb2c893 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -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);
}
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