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NFSD: Update the NFSv3 FSSTAT3res encoder to use struct xdr_stream 

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-11-06 13:08:45 -05:00
parent 4d74380a44
commit 8b7044984f
1 changed files with 44 additions and 14 deletions
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58
fs/nfsd/nfs3xdr.c
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@ -17,6 +17,13 @@
#define NFSDDBG_FACILITY NFSDDBG_XDR
/*
* Force construction of an empty post-op attr
*/
static const struct svc_fh nfs3svc_null_fh = {
.fh_no_wcc = true,
};
/*
* Mapping of S_IF* types to NFS file types
*/
@ -1392,27 +1399,50 @@ nfs3svc_encode_entry_plus(void *cd, const char *name,
return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
}
static bool
svcxdr_encode_fsstat3resok(struct xdr_stream *xdr,
const struct nfsd3_fsstatres *resp)
{
const struct kstatfs *s = &resp->stats;
u64 bs = s->f_bsize;
__be32 *p;
p = xdr_reserve_space(xdr, XDR_UNIT * 13);
if (!p)
return false;
p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
p = xdr_encode_hyper(p, s->f_files); /* total inodes */
p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
*p = cpu_to_be32(resp->invarsec); /* mean unchanged time */
return true;
}
/* FSSTAT */
int
nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p)
{
struct xdr_stream *xdr = &rqstp->rq_res_stream;
struct nfsd3_fsstatres *resp = rqstp->rq_resp;
struct kstatfs *s = &resp->stats;
u64 bs = s->f_bsize;
*p++ = resp->status;
*p++ = xdr_zero; /* no post_op_attr */
if (resp->status == 0) {
p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
p = xdr_encode_hyper(p, s->f_files); /* total inodes */
p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
*p++ = htonl(resp->invarsec); /* mean unchanged time */
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return 0;
switch (resp->status) {
case nfs_ok:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
return 0;
if (!svcxdr_encode_fsstat3resok(xdr, resp))
return 0;
break;
default:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
return 0;
}
return xdr_ressize_check(rqstp, p);
return 1;
}
/* FSINFO */