[PATCH v1 08/42] NFSD: Update READLINK3arg decoder to use struct xdr_stream

Chuck Lever
2021-01-05T15:30:47Z

The NFSv3 READLINK request takes a single filehandle, so it can
re-use GETATTR's decoder.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
fs/nfsd/nfs3proc.c | 9 +++++----
fs/nfsd/nfs3xdr.c | 13 -------------
fs/nfsd/xdr3.h | 6 ------
3 files changed, 5 insertions(+), 23 deletions(-)

diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index acdf47179a38..9e289e0f439b 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -124,15 +124,16 @@ nfsd3_proc_access(struct svc_rqst *rqstp)
static __be32
nfsd3_proc_readlink(struct svc_rqst *rqstp)
{
- struct nfsd3_readlinkargs *argp = rqstp->rq_argp;
+ struct nfsd_fhandle *argp = rqstp->rq_argp;
struct nfsd3_readlinkres *resp = rqstp->rq_resp;
+ char *buffer = page_address(*(rqstp->rq_next_page++));

dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));

/* Read the symlink. */
fh_copy(&resp->fh, &argp->fh);
resp->len = NFS3_MAXPATHLEN;
- resp->status = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
+ resp->status = nfsd_readlink(rqstp, &resp->fh, buffer, &resp->len);
return rpc_success;
}

@@ -768,10 +769,10 @@ static const struct svc_procedure nfsd_procedures3[22] = {
},
[NFS3PROC_READLINK] = {
.pc_func = nfsd3_proc_readlink,
- .pc_decode = nfs3svc_decode_readlinkargs,
+ .pc_decode = nfs3svc_decode_fhandleargs,
.pc_encode = nfs3svc_encode_readlinkres,
.pc_release = nfs3svc_release_fhandle,
- .pc_argsize = sizeof(struct nfsd3_readlinkargs),
+ .pc_argsize = sizeof(struct nfsd_fhandle),
.pc_ressize = sizeof(struct nfsd3_readlinkres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 0aafb096de91..db1d6ebf1353 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -543,19 +543,6 @@ nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p)
return xdr_argsize_check(rqstp, p);
}

-int
-nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nfsd3_readlinkargs *args = rqstp->rq_argp;
-
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- args->buffer = page_address(*(rqstp->rq_next_page++));
-
- return xdr_argsize_check(rqstp, p);
-}
-
int
nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p)
{
diff --git a/fs/nfsd/xdr3.h b/fs/nfsd/xdr3.h
index 7dfeeaa4e1df..08f909142ddf 100644
--- a/fs/nfsd/xdr3.h
+++ b/fs/nfsd/xdr3.h
@@ -70,11 +70,6 @@ struct nfsd3_renameargs {
unsigned int tlen;
};

-struct nfsd3_readlinkargs {
- struct svc_fh fh;
- char * buffer;
-};
-
struct nfsd3_linkargs {
struct svc_fh ffh;
struct svc_fh tfh;
@@ -282,7 +277,6 @@ int nfs3svc_decode_createargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_mkdirargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_mknodargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_renameargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_readlinkargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_linkargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_symlinkargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_readdirargs(struct svc_rqst *, __be32 *);