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authorAndy Adamson <andros@netapp.com>2013-03-19 12:36:52 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-04-05 10:16:38 -0700
commitc938c22b48302eeb9a6f3cc83f223f37d98ba6f7 (patch)
tree153e32e06fd3ec4b00146c424818690283f6fcd6 /include
parent0072625c351588b8fde9e6f46fb60ba2e521fb47 (diff)
NFSv4: include bitmap in nfsv4 get acl data
commit bf118a342f10dafe44b14451a1392c3254629a1f upstream. The NFSv4 bitmap size is unbounded: a server can return an arbitrary sized bitmap in an FATTR4_WORD0_ACL request. Replace using the nfs4_fattr_bitmap_maxsz as a guess to the maximum bitmask returned by a server with the inclusion of the bitmap (xdr length plus bitmasks) and the acl data xdr length to the (cached) acl page data. This is a general solution to commit e5012d1f "NFSv4.1: update nfs4_fattr_bitmap_maxsz" and fixes hitting a BUG_ON in xdr_shrink_bufhead when getting ACLs. Fix a bug in decode_getacl that returned -EINVAL on ACLs > page when getxattr was called with a NULL buffer, preventing ACL > PAGE_SIZE from being retrieved. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/nfs_xdr.h5
-rw-r--r--include/linux/sunrpc/xdr.h2
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 0012fc3d2c1b..2b254943ac11 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -588,11 +588,16 @@ struct nfs_getaclargs {
size_t acl_len;
unsigned int acl_pgbase;
struct page ** acl_pages;
+ struct page * acl_scratch;
struct nfs4_sequence_args seq_args;
};
+/* getxattr ACL interface flags */
+#define NFS4_ACL_LEN_REQUEST 0x0001 /* zero length getxattr buffer */
struct nfs_getaclres {
size_t acl_len;
+ size_t acl_data_offset;
+ int acl_flags;
struct nfs4_sequence_res seq_res;
};
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index a20970ef9e4e..af70af333546 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -191,6 +191,8 @@ extern int xdr_decode_array2(struct xdr_buf *buf, unsigned int base,
struct xdr_array2_desc *desc);
extern int xdr_encode_array2(struct xdr_buf *buf, unsigned int base,
struct xdr_array2_desc *desc);
+extern void _copy_from_pages(char *p, struct page **pages, size_t pgbase,
+ size_t len);
/*
* Provide some simple tools for XDR buffer overflow-checking etc.