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NFSD: Add helper to decode OPEN's createhow4 argument

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[ Upstream commit bf33bab3c4182cdd795983f14de5606e82fab377 ]

Refactor for clarity.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chuck Lever 2020-11-16 17:37:42 -05:00 • committed by Ksawlii
parent 4cb9382c5f
commit c6511e947e
1 changed files with 45 additions and 33 deletions
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74
fs/nfsd/nfs4xdr.c
View file

@ -946,6 +946,48 @@ nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup
return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
}
static __be32
nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
__be32 status;
if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
return nfserr_bad_xdr;
switch (open->op_createmode) {
case NFS4_CREATE_UNCHECKED:
case NFS4_CREATE_GUARDED:
status = nfsd4_decode_fattr4(argp, open->op_bmval,
ARRAY_SIZE(open->op_bmval),
&open->op_iattr, &open->op_acl,
&open->op_label, &open->op_umask);
if (status)
return status;
break;
case NFS4_CREATE_EXCLUSIVE:
status = nfsd4_decode_verifier4(argp, &open->op_verf);
if (status)
return status;
break;
case NFS4_CREATE_EXCLUSIVE4_1:
if (argp->minorversion < 1)
return nfserr_bad_xdr;
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,
&open->op_label, &open->op_umask);
if (status)
return status;
break;
default:
return nfserr_bad_xdr;
}
return nfs_ok;
}
static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
{
__be32 *p;
@ -1046,40 +1088,10 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
case NFS4_OPEN_NOCREATE:
break;
case NFS4_OPEN_CREATE:
READ_BUF(4);
open->op_createmode = be32_to_cpup(p++);
switch (open->op_createmode) {
case NFS4_CREATE_UNCHECKED:
case NFS4_CREATE_GUARDED:
status = nfsd4_decode_fattr4(argp, open->op_bmval,
ARRAY_SIZE(open->op_bmval),
&open->op_iattr, &open->op_acl,
&open->op_label, &open->op_umask);
if (status)
goto out;
break;
case NFS4_CREATE_EXCLUSIVE:
status = nfsd4_decode_verifier4(argp, &open->op_verf);
status = nfsd4_decode_createhow4(argp, open);
if (status)
return status;
break;
case NFS4_CREATE_EXCLUSIVE4_1:
if (argp->minorversion < 1)
goto xdr_error;
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,
&open->op_label, &open->op_umask);
if (status)
goto out;
break;
default:
goto xdr_error;
}
break;
default:
goto xdr_error;
}