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NFSD: Add common helpers to decode void args and encode void results

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Start off the conversion to xdr_stream by de-duplicating the functions
that decode void arguments and encode void results.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-11-05 14:48:29 -05:00
parent 5191955d6f
commit 788f7183fb
13 changed files with 64 additions and 86 deletions
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21
fs/nfsd/nfs2acl.c
View file

@ -185,10 +185,6 @@ static __be32 nfsacld_proc_access(struct svc_rqst *rqstp)
/*
* XDR decode functions
*/
static int nfsaclsvc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p)
{
return 1;
}
static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
{
@ -255,15 +251,6 @@ static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
* XDR encode functions
*/
/*
* There must be an encoding function for void results so svc_process
* will work properly.
*/
static int nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
{
return xdr_ressize_check(rqstp, p);
}
/* GETACL */
static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
{
@ -378,10 +365,10 @@ struct nfsd3_voidargs { int dummy; };
static const struct svc_procedure nfsd_acl_procedures2[5] = {
[ACLPROC2_NULL] = {
.pc_func = nfsacld_proc_null,
.pc_decode = nfsaclsvc_decode_voidarg,
.pc_encode = nfsaclsvc_encode_voidres,
.pc_argsize = sizeof(struct nfsd3_voidargs),
.pc_ressize = sizeof(struct nfsd3_voidargs),
.pc_decode = nfssvc_decode_voidarg,
.pc_encode = nfssvc_encode_voidres,
.pc_argsize = sizeof(struct nfsd_voidargs),
.pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST,
},

8
fs/nfsd/nfs3acl.c
View file

@ -245,10 +245,10 @@ struct nfsd3_voidargs { int dummy; };
static const struct svc_procedure nfsd_acl_procedures3[3] = {
[ACLPROC3_NULL] = {
.pc_func = nfsd3_proc_null,
.pc_decode = nfs3svc_decode_voidarg,
.pc_encode = nfs3svc_encode_voidres,
.pc_argsize = sizeof(struct nfsd3_voidargs),
.pc_ressize = sizeof(struct nfsd3_voidargs),
.pc_decode = nfssvc_decode_voidarg,
.pc_encode = nfssvc_encode_voidres,
.pc_argsize = sizeof(struct nfsd_voidargs),
.pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST,
},

10
fs/nfsd/nfs3proc.c
View file

@ -692,8 +692,6 @@ nfsd3_proc_commit(struct svc_rqst *rqstp)
#define nfsd3_attrstatres nfsd3_attrstat
#define nfsd3_wccstatres nfsd3_attrstat
#define nfsd3_createres nfsd3_diropres
#define nfsd3_voidres nfsd3_voidargs
struct nfsd3_voidargs { int dummy; };
#define ST 1 /* status*/
#define FH 17 /* filehandle with length */
@ -704,10 +702,10 @@ struct nfsd3_voidargs { int dummy; };
static const struct svc_procedure nfsd_procedures3[22] = {
[NFS3PROC_NULL] = {
.pc_func = nfsd3_proc_null,
.pc_decode = nfs3svc_decode_voidarg,
.pc_encode = nfs3svc_encode_voidres,
.pc_argsize = sizeof(struct nfsd3_voidargs),
.pc_ressize = sizeof(struct nfsd3_voidres),
.pc_decode = nfssvc_decode_voidarg,
.pc_encode = nfssvc_encode_voidres,
.pc_argsize = sizeof(struct nfsd_voidargs),
.pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST,
},

11
fs/nfsd/nfs3xdr.c
View file

@ -304,11 +304,6 @@ void fill_post_wcc(struct svc_fh *fhp)
/*
* XDR decode functions
*/
int
nfs3svc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p)
{
return 1;
}
int
nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p)
@ -642,12 +637,6 @@ nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p)
* XDR encode functions
*/
int
nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
{
return xdr_ressize_check(rqstp, p);
}
/* GETATTR */
int
nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p)

11
fs/nfsd/nfs4proc.c
View file

@ -3295,16 +3295,13 @@ static const char *nfsd4_op_name(unsigned opnum)
return "unknown_operation";
}
#define nfsd4_voidres nfsd4_voidargs
struct nfsd4_voidargs { int dummy; };
static const struct svc_procedure nfsd_procedures4[2] = {
[NFSPROC4_NULL] = {
.pc_func = nfsd4_proc_null,
.pc_decode = nfs4svc_decode_voidarg,
.pc_encode = nfs4svc_encode_voidres,
.pc_argsize = sizeof(struct nfsd4_voidargs),
.pc_ressize = sizeof(struct nfsd4_voidres),
.pc_decode = nfssvc_decode_voidarg,
.pc_encode = nfssvc_encode_voidres,
.pc_argsize = sizeof(struct nfsd_voidargs),
.pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 1,
},

12
fs/nfsd/nfs4xdr.c
View file

@ -5271,12 +5271,6 @@ nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
}
int
nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
{
return xdr_ressize_check(rqstp, p);
}
void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
{
struct nfsd4_compoundargs *args = rqstp->rq_argp;
@ -5294,12 +5288,6 @@ void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
}
}
int
nfs4svc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p)
{
return 1;
}
int
nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
{

8
fs/nfsd/nfsd.h
View file

@ -73,6 +73,14 @@ extern unsigned long nfsd_drc_mem_used;
extern const struct seq_operations nfs_exports_op;
/*
* Common void argument and result helpers
*/
struct nfsd_voidargs { };
struct nfsd_voidres { };
int nfssvc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p);
int nfssvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p);
/*
* Function prototypes.
*/

25
fs/nfsd/nfsproc.c
View file

@ -609,7 +609,6 @@ nfsd_proc_statfs(struct svc_rqst *rqstp)
* NFSv2 Server procedures.
* Only the results of non-idempotent operations are cached.
*/
struct nfsd_void { int dummy; };
#define ST 1 /* status */
#define FH 8 /* filehandle */
@ -618,10 +617,10 @@ struct nfsd_void { int dummy; };
static const struct svc_procedure nfsd_procedures2[18] = {
[NFSPROC_NULL] = {
.pc_func = nfsd_proc_null,
.pc_decode = nfssvc_decode_void,
.pc_encode = nfssvc_encode_void,
.pc_argsize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_void),
.pc_decode = nfssvc_decode_voidarg,
.pc_encode = nfssvc_encode_voidres,
.pc_argsize = sizeof(struct nfsd_voidargs),
.pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 0,
},
@ -647,10 +646,10 @@ static const struct svc_procedure nfsd_procedures2[18] = {
},
[NFSPROC_ROOT] = {
.pc_func = nfsd_proc_root,
.pc_decode = nfssvc_decode_void,
.pc_encode = nfssvc_encode_void,
.pc_argsize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_void),
.pc_decode = nfssvc_decode_voidarg,
.pc_encode = nfssvc_encode_voidres,
.pc_argsize = sizeof(struct nfsd_voidargs),
.pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 0,
},
@ -685,10 +684,10 @@ static const struct svc_procedure nfsd_procedures2[18] = {
},
[NFSPROC_WRITECACHE] = {
.pc_func = nfsd_proc_writecache,
.pc_decode = nfssvc_decode_void,
.pc_encode = nfssvc_encode_void,
.pc_argsize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_void),
.pc_decode = nfssvc_decode_voidarg,
.pc_encode = nfssvc_encode_voidres,
.pc_argsize = sizeof(struct nfsd_voidargs),
.pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 0,
},

28
fs/nfsd/nfssvc.c
View file

@ -1075,6 +1075,34 @@ int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
return 1;
}
/**
* nfssvc_decode_voidarg - Decode void arguments
* @rqstp: Server RPC transaction context
* @p: buffer containing arguments to decode
*
* Return values:
* %0: Arguments were not valid
* %1: Decoding was successful
*/
int nfssvc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p)
{
return 1;
}
/**
* nfssvc_encode_voidres - Encode void results
* @rqstp: Server RPC transaction context
* @p: buffer in which to encode results
*
* Return values:
* %0: Local error while encoding
* %1: Encoding was successful
*/
int nfssvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
{
return xdr_ressize_check(rqstp, p);
}
int nfsd_pool_stats_open(struct inode *inode, struct file *file)
{
int ret;

10
fs/nfsd/nfsxdr.c
View file

@ -192,11 +192,6 @@ __be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *f
/*
* XDR decode functions
*/
int
nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p)
{
return xdr_argsize_check(rqstp, p);
}
int
nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p)
@ -423,11 +418,6 @@ nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
/*
* XDR encode functions
*/
int
nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p)
{
return xdr_ressize_check(rqstp, p);
}
int
nfssvc_encode_stat(struct svc_rqst *rqstp, __be32 *p)

2
fs/nfsd/xdr.h
View file

@ -144,7 +144,6 @@ union nfsd_xdrstore {
#define NFS2_SVC_XDRSIZE sizeof(union nfsd_xdrstore)
int nfssvc_decode_void(struct svc_rqst *, __be32 *);
int nfssvc_decode_fhandle(struct svc_rqst *, __be32 *);
int nfssvc_decode_sattrargs(struct svc_rqst *, __be32 *);
int nfssvc_decode_diropargs(struct svc_rqst *, __be32 *);
@ -156,7 +155,6 @@ int nfssvc_decode_readlinkargs(struct svc_rqst *, __be32 *);
int nfssvc_decode_linkargs(struct svc_rqst *, __be32 *);
int nfssvc_decode_symlinkargs(struct svc_rqst *, __be32 *);
int nfssvc_decode_readdirargs(struct svc_rqst *, __be32 *);
int nfssvc_encode_void(struct svc_rqst *, __be32 *);
int nfssvc_encode_stat(struct svc_rqst *, __be32 *);
int nfssvc_encode_attrstat(struct svc_rqst *, __be32 *);
int nfssvc_encode_diropres(struct svc_rqst *, __be32 *);

2
fs/nfsd/xdr3.h
View file

@ -273,7 +273,6 @@ union nfsd3_xdrstore {
#define NFS3_SVC_XDRSIZE sizeof(union nfsd3_xdrstore)
int nfs3svc_decode_voidarg(struct svc_rqst *, __be32 *);
int nfs3svc_decode_fhandle(struct svc_rqst *, __be32 *);
int nfs3svc_decode_sattrargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_diropargs(struct svc_rqst *, __be32 *);
@ -290,7 +289,6 @@ int nfs3svc_decode_symlinkargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_readdirargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_readdirplusargs(struct svc_rqst *, __be32 *);
int nfs3svc_decode_commitargs(struct svc_rqst *, __be32 *);
int nfs3svc_encode_voidres(struct svc_rqst *, __be32 *);
int nfs3svc_encode_attrstat(struct svc_rqst *, __be32 *);
int nfs3svc_encode_wccstat(struct svc_rqst *, __be32 *);
int nfs3svc_encode_diropres(struct svc_rqst *, __be32 *);

2
fs/nfsd/xdr4.h
View file

@ -781,8 +781,6 @@ set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp);
int nfs4svc_decode_voidarg(struct svc_rqst *, __be32 *);
int nfs4svc_encode_voidres(struct svc_rqst *, __be32 *);
int nfs4svc_decode_compoundargs(struct svc_rqst *, __be32 *);
int nfs4svc_encode_compoundres(struct svc_rqst *, __be32 *);
__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *, u32);