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authorMi Jinlong <mijinlong@cn.fujitsu.com>2011-04-27 05:09:58 +0400
committerJ. Bruce Fields <bfields@redhat.com>2011-04-30 04:47:55 +0400
commit868b89c3dc25eec03985b31ff070e8f73c818980 (patch)
treef3ef1fc3c5d7414195af355fddd956d81fc81fc6 /fs/nfsd
parentb7c66360dc34e64742edabf4dc410070aa883119 (diff)
downloadlinux-868b89c3dc25eec03985b31ff070e8f73c818980.tar.xz
nfsd41: compare request's opcnt with session's maxops at nfsd4_sequence
Make sure nfs server errors out if request contains more ops than channel allows. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> [bfields@redhat.com: use helper function] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4state.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 6dbaa379c863..3196dc388578 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1724,6 +1724,13 @@ static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_sessi
return;
}
+static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
+{
+ struct nfsd4_compoundargs *args = rqstp->rq_argp;
+
+ return args->opcnt > session->se_fchannel.maxops;
+}
+
__be32
nfsd4_sequence(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
@@ -1752,6 +1759,10 @@ nfsd4_sequence(struct svc_rqst *rqstp,
if (!session)
goto out;
+ status = nfserr_too_many_ops;
+ if (nfsd4_session_too_many_ops(rqstp, session))
+ goto out;
+
status = nfserr_badslot;
if (seq->slotid >= session->se_fchannel.maxreqs)
goto out;