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authorAndy Adamson <andros@netapp.com>2011-12-07 20:55:27 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-05 19:42:42 +0400
commitbf118a342f10dafe44b14451a1392c3254629a1f (patch)
tree50c2800c7c92f8e47e4a0a440e2a97847f678e19 /include/linux/nfs_xdr.h
parent3476f114addb7b96912840a234702f660a1f460b (diff)
downloadlinux-bf118a342f10dafe44b14451a1392c3254629a1f.tar.xz
NFSv4: include bitmap in nfsv4 get acl data
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. Cc: stable@kernel.org Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/nfs_xdr.h')
-rw-r--r--include/linux/nfs_xdr.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 2a7c533be5dd..6c898afe6095 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -602,11 +602,16 @@ 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;
};