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authorBryan Schumaker <bjschuma@netapp.com>2010-10-20 15:44:31 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-10-23 15:27:34 -0400
commitafa8ccc978c24d8ab22e3b3b8cbd1054c84c070b (patch)
tree77a05498dd1decb19f296f0e9f60da0916a40bbd /fs/nfs/nfs4xdr.c
parentbabddc72a9468884ce1a23db3c3d54b0afa299f0 (diff)
downloadblackbird-op-linux-afa8ccc978c24d8ab22e3b3b8cbd1054c84c070b.tar.gz
blackbird-op-linux-afa8ccc978c24d8ab22e3b3b8cbd1054c84c070b.zip
NFS: remove page size checking code
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>
Diffstat (limited to 'fs/nfs/nfs4xdr.c')
-rw-r--r--fs/nfs/nfs4xdr.c68
1 files changed, 1 insertions, 67 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index a4919e999354..8346e977d837 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4200,12 +4200,9 @@ out_overflow:
static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
- struct page *page = *rcvbuf->pages;
struct kvec *iov = rcvbuf->head;
size_t hdrlen;
u32 recvd, pglen = rcvbuf->page_len;
- __be32 *end, *entry, *p, *kaddr;
- unsigned int nr = 0;
int status;
status = decode_op_hdr(xdr, OP_READDIR);
@@ -4225,71 +4222,8 @@ static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct n
pglen = recvd;
xdr_read_pages(xdr, pglen);
- BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
- kaddr = p = kmap_atomic(page, KM_USER0);
- end = p + ((pglen + readdir->pgbase) >> 2);
- entry = p;
-
- /* Make sure the packet actually has a value_follows and EOF entry */
- if ((entry + 1) > end)
- goto short_pkt;
-
- for (; *p++; nr++) {
- u32 len, attrlen, xlen;
- if (end - p < 3)
- goto short_pkt;
- dprintk("cookie = %Lu, ", *((unsigned long long *)p));
- p += 2; /* cookie */
- len = ntohl(*p++); /* filename length */
- if (len > NFS4_MAXNAMLEN) {
- dprintk("NFS: giant filename in readdir (len 0x%x)\n",
- len);
- goto err_unmap;
- }
- xlen = XDR_QUADLEN(len);
- if (end - p < xlen + 1)
- goto short_pkt;
- dprintk("filename = %*s\n", len, (char *)p);
- p += xlen;
- len = ntohl(*p++); /* bitmap length */
- if (end - p < len + 1)
- goto short_pkt;
- p += len;
- attrlen = XDR_QUADLEN(ntohl(*p++));
- if (end - p < attrlen + 2)
- goto short_pkt;
- p += attrlen; /* attributes */
- 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 0;
-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.
- */
- dprintk("%s: short packet at entry %d\n", __func__, nr);
- entry[0] = entry[1] = 0;
- if (nr)
- goto out;
-err_unmap:
- kunmap_atomic(kaddr, KM_USER0);
- return -errno_NFSERR_IO;
}
static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
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