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NFSD: Add helper to decode NFSv4 verifiers 

This helper will be used to simplify decoders in subsequent
patches.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-11-16 17:34:01 -05:00
parent 3d5877e8e0
commit 796dd1c6b6
1 changed files with 18 additions and 4 deletions
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22
fs/nfsd/nfs4xdr.c
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@ -284,6 +284,18 @@ nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
return nfs_ok;
}
static __be32
nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
{
__be32 *p;
p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
if (!p)
return nfserr_bad_xdr;
memcpy(verf->data, p, sizeof(verf->data));
return nfs_ok;
}
static __be32
nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
{
@ -1047,14 +1059,16 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
goto out;
break;
case NFS4_CREATE_EXCLUSIVE:
READ_BUF(NFS4_VERIFIER_SIZE);
COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
status = nfsd4_decode_verifier4(argp, &open->op_verf);
if (status)
return status;
break;
case NFS4_CREATE_EXCLUSIVE4_1:
if (argp->minorversion < 1)
goto xdr_error;
READ_BUF(NFS4_VERIFIER_SIZE);
COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
status = nfsd4_decode_verifier4(argp, &open->op_verf);
if (status)
return status;
status = nfsd4_decode_fattr4(argp, open->op_bmval,
ARRAY_SIZE(open->op_bmval),
&open->op_iattr, &open->op_acl,