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NFSD: Add helper to decode OPEN's openflag4 argument 

Refactor for clarity.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-11-16 17:41:21 -05:00
parent bf33bab3c4
commit e6ec04b27b
1 changed files with 25 additions and 13 deletions
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38
fs/nfsd/nfs4xdr.c
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@ -988,6 +988,28 @@ nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open
return nfs_ok;
}
static __be32
nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
__be32 status;
if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
return nfserr_bad_xdr;
switch (open->op_create) {
case NFS4_OPEN_NOCREATE:
break;
case NFS4_OPEN_CREATE:
status = nfsd4_decode_createhow4(argp, open);
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;
@ -1082,19 +1104,9 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
status = nfsd4_decode_opaque(argp, &open->op_owner);
if (status)
goto xdr_error;
READ_BUF(4);
open->op_create = be32_to_cpup(p++);
switch (open->op_create) {
case NFS4_OPEN_NOCREATE:
break;
case NFS4_OPEN_CREATE:
status = nfsd4_decode_createhow4(argp, open);
if (status)
return status;
break;
default:
goto xdr_error;
}
status = nfsd4_decode_openflag4(argp, open);
if (status)
return status;
/* open_claim */
READ_BUF(4);