nfsd4: move name-length checks to xdr
Again, these checks are better in the xdr code.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 6bfa293..5f35f35 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1189,17 +1189,6 @@
return clp;
}
-static int check_name(struct xdr_netobj name)
-{
- if (name.len == 0)
- return 0;
- if (name.len > NFS4_OPAQUE_LIMIT) {
- dprintk("NFSD: check_name: name too long(%d)!\n", name.len);
- return 0;
- }
- return 1;
-}
-
static void
add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
{
@@ -1442,7 +1431,7 @@
__func__, rqstp, exid, exid->clname.len, exid->clname.data,
addr_str, exid->flags, exid->spa_how);
- if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A))
+ if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
return nfserr_inval;
/* Currently only support SP4_NONE */
@@ -1992,19 +1981,13 @@
nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_setclientid *setclid)
{
- struct xdr_netobj clname = {
- .len = setclid->se_namelen,
- .data = setclid->se_name,
- };
+ struct xdr_netobj clname = setclid->se_name;
nfs4_verifier clverifier = setclid->se_verf;
unsigned int strhashval;
struct nfs4_client *conf, *unconf, *new;
__be32 status;
char dname[HEXDIR_LEN];
- if (!check_name(clname))
- return nfserr_inval;
-
status = nfs4_make_rec_clidname(dname, &clname);
if (status)
return status;
@@ -2523,9 +2506,6 @@
struct nfs4_openowner *oo = NULL;
__be32 status;
- if (!check_name(open->op_owner))
- return nfserr_inval;
-
if (STALE_CLIENTID(&open->op_clientid))
return nfserr_stale_clientid;
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 94da8bb..2cab33c 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -697,6 +697,23 @@
return nfserr_bad_xdr;
}
+static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
+{
+ __be32 *p;
+
+ READ_BUF(4);
+ READ32(o->len);
+
+ if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
+ return nfserr_bad_xdr;
+
+ READ_BUF(o->len);
+ SAVEMEM(o->data, o->len);
+ return nfs_ok;
+xdr_error:
+ return nfserr_bad_xdr;
+}
+
static __be32
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
@@ -715,13 +732,12 @@
status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
if (status)
goto xdr_error;
- READ_BUF(sizeof(clientid_t) + 4);
+ READ_BUF(sizeof(clientid_t));
COPYMEM(&open->op_clientid, sizeof(clientid_t));
- READ32(open->op_owner.len);
-
- /* owner, open_flag */
- READ_BUF(open->op_owner.len + 4);
- SAVEMEM(open->op_owner.data, open->op_owner.len);
+ status = nfsd4_decode_opaque(argp, &open->op_owner);
+ if (status)
+ goto xdr_error;
+ READ_BUF(4);
READ32(open->op_create);
switch (open->op_create) {
case NFS4_OPEN_NOCREATE:
@@ -964,12 +980,13 @@
{
DECODE_HEAD;
- READ_BUF(12);
+ READ_BUF(8);
COPYMEM(setclientid->se_verf.data, 8);
- READ32(setclientid->se_namelen);
- READ_BUF(setclientid->se_namelen + 8);
- SAVEMEM(setclientid->se_name, setclientid->se_namelen);
+ status = nfsd4_decode_opaque(argp, &setclientid->se_name);
+ if (status)
+ return nfserr_bad_xdr;
+ READ_BUF(8);
READ32(setclientid->se_callback_prog);
READ32(setclientid->se_callback_netid_len);
@@ -1112,11 +1129,9 @@
READ_BUF(NFS4_VERIFIER_SIZE);
COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
- READ_BUF(4);
- READ32(exid->clname.len);
-
- READ_BUF(exid->clname.len);
- SAVEMEM(exid->clname.data, exid->clname.len);
+ status = nfsd4_decode_opaque(argp, &exid->clname);
+ if (status)
+ return nfserr_bad_xdr;
READ_BUF(4);
READ32(exid->flags);
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index c901214..4c8a7ec 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -317,8 +317,7 @@
struct nfsd4_setclientid {
nfs4_verifier se_verf; /* request */
- u32 se_namelen; /* request */
- char * se_name; /* request */
+ struct xdr_netobj se_name;
u32 se_callback_prog; /* request */
u32 se_callback_netid_len; /* request */
char * se_callback_netid_val; /* request */