NFSv4.2: Fix READ_PLUS size calculations
authorAnna Schumaker <Anna.Schumaker@Netapp.com>
Wed, 31 May 2023 21:02:54 +0000 (17:02 -0400)
committerAnna Schumaker <Anna.Schumaker@Netapp.com>
Wed, 23 Aug 2023 19:58:47 +0000 (15:58 -0400)
commit8d18f6c5bb864d97a730f471c56cdecf313efe64
tree42f76ccb09d82463c11ea21071f9ec6952ec9e07
parentbb05a617f06b7a882e19c4f475b8e37f14d9ceac
NFSv4.2: Fix READ_PLUS size calculations

I bump the decode_read_plus_maxsz to account for hole segments, but I
need to subtract out this increase when calling
rpc_prepare_reply_pages() so the common case of single data segment
replies can be directly placed into the xdr pages without needing to be
shifted around.

Reported-by: Chuck Lever <chuck.lever@oracle.com>
Fixes: d3b00a802c845 ("NFS: Replace the READ_PLUS decoding code")
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
fs/nfs/nfs42xdr.c