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NFS: remove page size checking code

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Remove the page size checking code for a readdir decode.  This is now done
by decode_dirent with xdr_streams.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker
2010-10-20 15:44:31 -04:00
committed by Trond Myklebust
parent babddc72a9
commit afa8ccc978
3 changed files with 1 additions and 197 deletions
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78
fs/nfs/nfs3xdr.c
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@@ -554,9 +554,8 @@ nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res
struct kvec *iov = rcvbuf->head;
struct page **page;
size_t hdrlen;
u32 len, recvd, pglen;
u32 recvd, pglen;
int status, nr = 0;
__be32 *entry, *end, *kaddr;
status = ntohl(*p++);
/* Decode post_op_attrs */
@@ -586,83 +585,8 @@ nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res
if (pglen > recvd)
pglen = recvd;
page = rcvbuf->pages;
kaddr = p = kmap_atomic(*page, KM_USER0);
end = (__be32 *)((char *)p + pglen);
entry = p;
/* Make sure the packet actually has a value_follows and EOF entry */
if ((entry + 1) > end)
goto short_pkt;
for (; *p++; nr++) {
if (p + 3 > end)
goto short_pkt;
p += 2; /* inode # */
len = ntohl(*p++); /* string length */
p += XDR_QUADLEN(len) + 2; /* name + cookie */
if (len > NFS3_MAXNAMLEN) {
dprintk("NFS: giant filename in readdir (len 0x%x)!\n",
len);
goto err_unmap;
}
if (res->plus) {
/* post_op_attr */
if (p + 2 > end)
goto short_pkt;
if (*p++) {
p += 21;
if (p + 1 > end)
goto short_pkt;
}
/* post_op_fh3 */
if (*p++) {
if (p + 1 > end)
goto short_pkt;
len = ntohl(*p++);
if (len > NFS3_FHSIZE) {
dprintk("NFS: giant filehandle in "
"readdir (len 0x%x)!\n", len);
goto err_unmap;
}
p += XDR_QUADLEN(len);
}
}
if (p + 2 > end)
goto short_pkt;
entry = p;
}
/*
* Apparently some server sends responses that are a valid size, but
* contain no entries, and have value_follows==0 and EOF==0. For
* those, just set the EOF marker.
*/
if (!nr && entry[1] == 0) {
dprintk("NFS: readdir reply truncated!\n");
entry[1] = 1;
}
out:
kunmap_atomic(kaddr, KM_USER0);
return nr;
short_pkt:
/*
* When we get a short packet there are 2 possibilities. We can
* return an error, or fix up the response to look like a valid
* response and return what we have so far. If there are no
* entries and the packet was short, then return -EIO. If there
* are valid entries in the response, return them and pretend that
* the call was successful, but incomplete. The caller can retry the
* readdir starting at the last cookie.
*/
entry[0] = entry[1] = 0;
if (!nr)
nr = -errno_NFSERR_IO;
goto out;
err_unmap:
nr = -errno_NFSERR_IO;
goto out;
}
__be32 *