SUNRPC: Change return value type of .pc_decode
Returning an undecorated integer is an age-old trope, but it's
not clear (even to previous experts in this code) that the only
valid return values are 1 and 0. These functions do not return
a negative errno, rpc_stat value, or a positive length.
Document there are only two valid return values by having
.pc_decode return only true or false.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index 08e8991..b5817a4 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -272,7 +272,7 @@ svcxdr_encode_fattr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
* XDR decode functions
*/
-int
+bool
nfssvc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_fhandle *args = rqstp->rq_argp;
@@ -280,7 +280,7 @@ nfssvc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
return svcxdr_decode_fhandle(xdr, &args->fh);
}
-int
+bool
nfssvc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_sattrargs *args = rqstp->rq_argp;
@@ -289,7 +289,7 @@ nfssvc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
svcxdr_decode_sattr(rqstp, xdr, &args->attrs);
}
-int
+bool
nfssvc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_diropargs *args = rqstp->rq_argp;
@@ -297,54 +297,54 @@ nfssvc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
return svcxdr_decode_diropargs(xdr, &args->fh, &args->name, &args->len);
}
-int
+bool
nfssvc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_readargs *args = rqstp->rq_argp;
u32 totalcount;
if (!svcxdr_decode_fhandle(xdr, &args->fh))
- return 0;
+ return false;
if (xdr_stream_decode_u32(xdr, &args->offset) < 0)
- return 0;
+ return false;
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
- return 0;
+ return false;
/* totalcount is ignored */
if (xdr_stream_decode_u32(xdr, &totalcount) < 0)
- return 0;
+ return false;
- return 1;
+ return true;
}
-int
+bool
nfssvc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_writeargs *args = rqstp->rq_argp;
u32 beginoffset, totalcount;
if (!svcxdr_decode_fhandle(xdr, &args->fh))
- return 0;
+ return false;
/* beginoffset is ignored */
if (xdr_stream_decode_u32(xdr, &beginoffset) < 0)
- return 0;
+ return false;
if (xdr_stream_decode_u32(xdr, &args->offset) < 0)
- return 0;
+ return false;
/* totalcount is ignored */
if (xdr_stream_decode_u32(xdr, &totalcount) < 0)
- return 0;
+ return false;
/* opaque data */
if (xdr_stream_decode_u32(xdr, &args->len) < 0)
- return 0;
+ return false;
if (args->len > NFSSVC_MAXBLKSIZE_V2)
- return 0;
+ return false;
if (!xdr_stream_subsegment(xdr, &args->payload, args->len))
- return 0;
+ return false;
- return 1;
+ return true;
}
-int
+bool
nfssvc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_createargs *args = rqstp->rq_argp;
@@ -354,7 +354,7 @@ nfssvc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
svcxdr_decode_sattr(rqstp, xdr, &args->attrs);
}
-int
+bool
nfssvc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_renameargs *args = rqstp->rq_argp;
@@ -365,7 +365,7 @@ nfssvc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
&args->tname, &args->tlen);
}
-int
+bool
nfssvc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_linkargs *args = rqstp->rq_argp;
@@ -375,39 +375,39 @@ nfssvc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
&args->tname, &args->tlen);
}
-int
+bool
nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_symlinkargs *args = rqstp->rq_argp;
struct kvec *head = rqstp->rq_arg.head;
if (!svcxdr_decode_diropargs(xdr, &args->ffh, &args->fname, &args->flen))
- return 0;
+ return false;
if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
- return 0;
+ return false;
if (args->tlen == 0)
- return 0;
+ return false;
args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
args->first.iov_base = xdr_inline_decode(xdr, args->tlen);
if (!args->first.iov_base)
- return 0;
+ return false;
return svcxdr_decode_sattr(rqstp, xdr, &args->attrs);
}
-int
+bool
nfssvc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_readdirargs *args = rqstp->rq_argp;
if (!svcxdr_decode_fhandle(xdr, &args->fh))
- return 0;
+ return false;
if (xdr_stream_decode_u32(xdr, &args->cookie) < 0)
- return 0;
+ return false;
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
- return 0;
+ return false;
- return 1;
+ return true;
}
/*
