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| author | Andy Adamson <andros@netapp.com> | 2011-12-07 20:55:27 +0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-01-05 19:42:42 +0400 |
| commit | bf118a342f10dafe44b14451a1392c3254629a1f (patch) | |
| tree | 50c2800c7c92f8e47e4a0a440e2a97847f678e19 /net/sunrpc/xdr.c | |
| parent | 3476f114addb7b96912840a234702f660a1f460b (diff) | |
| download | linux-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 'net/sunrpc/xdr.c')
| -rw-r--r-- | net/sunrpc/xdr.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 277ebd4bf095..593f4c605305 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 |