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authorChuck Lever <chuck.lever@oracle.com>2021-06-03 16:52:58 -0400
committerJ. Bruce Fields <bfields@redhat.com>2021-07-06 20:14:44 -0400
commit7cf96b6d0104b12aa30961901879e428884b1695 (patch)
tree2126204c474abf4dc58036cb9abfe6d4cad1567c /fs/lockd
parentbc3665fd718b325cfff3abd383b00d1a87e028dc (diff)
lockd: Update the NLMv4 SHARE arguments decoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/lockd')
-rw-r--r--fs/lockd/xdr4.c99
1 files changed, 26 insertions, 73 deletions
diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c
index 2dbf82c2726b..e6bab1d1e41f 100644
--- a/fs/lockd/xdr4.c
+++ b/fs/lockd/xdr4.c
@@ -42,37 +42,6 @@ loff_t_to_s64(loff_t offset)
return res;
}
-/*
- * XDR functions for basic NLM types
- */
-static __be32 *
-nlm4_decode_cookie(__be32 *p, struct nlm_cookie *c)
-{
- unsigned int len;
-
- len = ntohl(*p++);
-
- if(len==0)
- {
- c->len=4;
- memset(c->data, 0, 4); /* hockeypux brain damage */
- }
- else if(len<=NLM_MAXCOOKIELEN)
- {
- c->len=len;
- memcpy(c->data, p, len);
- p+=XDR_QUADLEN(len);
- }
- else
- {
- dprintk("lockd: bad cookie size %d (only cookies under "
- "%d bytes are supported.)\n",
- len, NLM_MAXCOOKIELEN);
- return NULL;
- }
- return p;
-}
-
static __be32 *
nlm4_encode_cookie(__be32 *p, struct nlm_cookie *c)
{
@@ -82,20 +51,6 @@ nlm4_encode_cookie(__be32 *p, struct nlm_cookie *c)
return p;
}
-static __be32 *
-nlm4_decode_fh(__be32 *p, struct nfs_fh *f)
-{
- memset(f->data, 0, sizeof(f->data));
- f->size = ntohl(*p++);
- if (f->size > NFS_MAXFHSIZE) {
- dprintk("lockd: bad fhandle size %d (should be <=%d)\n",
- f->size, NFS_MAXFHSIZE);
- return NULL;
- }
- memcpy(f->data, p, f->size);
- return p + XDR_QUADLEN(f->size);
-}
-
/*
* NLM file handles are defined by specification to be a variable-length
* XDR opaque no longer than 1024 bytes. However, this implementation
@@ -122,15 +77,6 @@ svcxdr_decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh)
return true;
}
-/*
- * Encode and decode owner handle
- */
-static __be32 *
-nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh)
-{
- return xdr_decode_netobj(p, oh);
-}
-
static bool
svcxdr_decode_lock(struct xdr_stream *xdr, struct nlm_lock *lock)
{
@@ -336,34 +282,41 @@ nlm4svc_decode_reboot(struct svc_rqst *rqstp, __be32 *p)
}
int
-nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nlm_res *resp = rqstp->rq_resp;
-
- if (!(p = nlm4_encode_testres(p, resp)))
- return 0;
- return xdr_ressize_check(rqstp, p);
-}
-
-int
nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p)
{
+ struct xdr_stream *xdr = &rqstp->rq_arg_stream;
struct nlm_args *argp = rqstp->rq_argp;
struct nlm_lock *lock = &argp->lock;
memset(lock, 0, sizeof(*lock));
locks_init_lock(&lock->fl);
- lock->svid = ~(u32) 0;
+ lock->svid = ~(u32)0;
- if (!(p = nlm4_decode_cookie(p, &argp->cookie))
- || !(p = xdr_decode_string_inplace(p, &lock->caller,
- &lock->len, NLM_MAXSTRLEN))
- || !(p = nlm4_decode_fh(p, &lock->fh))
- || !(p = nlm4_decode_oh(p, &lock->oh)))
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
return 0;
- argp->fsm_mode = ntohl(*p++);
- argp->fsm_access = ntohl(*p++);
- return xdr_argsize_check(rqstp, p);
+ if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))
+ return 0;
+ if (!svcxdr_decode_fhandle(xdr, &lock->fh))
+ return 0;
+ if (!svcxdr_decode_owner(xdr, &lock->oh))
+ return 0;
+ /* XXX: Range checks are missing in the original code */
+ if (xdr_stream_decode_u32(xdr, &argp->fsm_mode) < 0)
+ return 0;
+ if (xdr_stream_decode_u32(xdr, &argp->fsm_access) < 0)
+ return 0;
+
+ return 1;
+}
+
+int
+nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
+{
+ struct nlm_res *resp = rqstp->rq_resp;
+
+ if (!(p = nlm4_encode_testres(p, resp)))
+ return 0;
+ return xdr_ressize_check(rqstp, p);
}
int