[05/50] nfsd4: use more generous NFS4_ACL_MAX

Commit Message

Bruce Fields March 23, 2014, 1:11 a.m. UTC

From: "J. Bruce Fields" <[e-mail]>

Signed-off-by: J. Bruce Fields <[e-mail]>
---
 fs/nfsd/acl.h | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

Patch

diff --git a/fs/nfsd/acl.h b/fs/nfsd/acl.h
index a812fd1..b481e1f 100644
--- a/fs/nfsd/acl.h
+++ b/fs/nfsd/acl.h
@@ -39,9 +39,13 @@  struct nfs4_acl;
 struct svc_fh;
 struct svc_rqst;
 
-/* Maximum ACL we'll accept from client; chosen (somewhat arbitrarily) to
- * fit in a page: */
-#define NFS4_ACL_MAX 170
+/*
+ * Maximum ACL we'll accept from a client; chosen (somewhat
+ * arbitrarily) so that kmalloc'ing the ACL shouldn't require a
+ * high-order allocation.  This allows 204 ACEs on x86_64:
+ */
+#define NFS4_ACL_MAX ((PAGE_SIZE - sizeof(struct nfs4_acl)) \
+			/ sizeof(struct nfs4_ace))
 
 struct nfs4_acl *nfs4_acl_new(int);
 int nfs4_acl_get_whotype(char *, u32);