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authorAndy Adamson <andros@netapp.com>2011-12-07 11:55:27 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2012-01-25 16:13:15 -0800
commit628fc192adbaae0c6178b9015fb916ce61d72b36 (patch)
treeac8b225a65abb1510696af58c0fd7d6b196166a2 /net
parent42a50a981577e43928cc23b048cf0a3833bb8da4 (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: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/xdr.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 277ebd4bf09..593f4c60530 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -296,7 +296,7 @@ _copy_to_pages(struct page **pages, size_t pgbase, const char *p, size_t len)
* Copies data into an arbitrary memory location from an array of pages
* The copy is assumed to be non-overlapping.
*/
-static void
+void
_copy_from_pages(char *p, struct page **pages, size_t pgbase, size_t len)
{
struct page **pgfrom;
@@ -324,6 +324,7 @@ _copy_from_pages(char *p, struct page **pages, size_t pgbase, size_t len)
} while ((len -= copy) != 0);
}
+EXPORT_SYMBOL_GPL(_copy_from_pages);
/*
* xdr_shrink_bufhead