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authorJ. Bruce Fields <bfields@redhat.com>2013-08-23 17:26:28 -0400
committerJ. Bruce Fields <bfields@redhat.com>2013-09-06 11:45:58 -0400
commitd4a516560fc96a9d486a9939bcb567e3fdce8f49 (patch)
treeb7cf4d198b901d81b8403667f1bda1f2329b48c7 /net/sunrpc
parent9dfd87da1aeb0fd364167ad199f40fe96a6a87be (diff)
downloadlinux-d4a516560fc96a9d486a9939bcb567e3fdce8f49.tar.gz
rpc: let xdr layer allocate gssproxy receieve pages
In theory the linux cred in a gssproxy reply can include up to NGROUPS_MAX data, 256K of data. In the common case we expect it to be shorter. So do as the nfsv3 ACL code does and let the xdr code allocate the pages as they come in, instead of allocating a lot of pages that won't typically be used. Tested-by: Simo Sorce <simo@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/auth_gss/gss_rpc_upcall.c16
1 files changed, 6 insertions, 10 deletions
diff --git a/net/sunrpc/auth_gss/gss_rpc_upcall.c b/net/sunrpc/auth_gss/gss_rpc_upcall.c
index be95af3d105..f1eb0d16666 100644
--- a/net/sunrpc/auth_gss/gss_rpc_upcall.c
+++ b/net/sunrpc/auth_gss/gss_rpc_upcall.c
@@ -223,18 +223,14 @@ static void gssp_free_receive_pages(struct gssx_arg_accept_sec_context *arg)
static int gssp_alloc_receive_pages(struct gssx_arg_accept_sec_context *arg)
{
- int i;
-
arg->npages = DIV_ROUND_UP(NGROUPS_MAX * 4, PAGE_SIZE);
arg->pages = kzalloc(arg->npages * sizeof(struct page *), GFP_KERNEL);
-
- for (i=0; i < arg->npages; i++) {
- arg->pages[i] = alloc_page(GFP_KERNEL);
- if (arg->pages[i] == NULL) {
- gssp_free_receive_pages(arg);
- return -ENOMEM;
- }
- }
+ /*
+ * XXX: actual pages are allocated by xdr layer in
+ * xdr_partial_copy_from_skb.
+ */
+ if (!arg->pages)
+ return -ENOMEM;
return 0;
}