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lockd: Update the NLMv4 UNLOCK arguments decoder to use struct xdr_stream 

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever 2021-06-03 16:52:40 -04:00 committed by J. Bruce Fields
parent 1e1f38dcf3
commit d76d8c25ce
1 changed files with 15 additions and 42 deletions
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57
fs/lockd/xdr4.c
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@ -131,36 +131,6 @@ nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh)
return xdr_decode_netobj(p, oh);
}
static __be32 *
nlm4_decode_lock(__be32 *p, struct nlm_lock *lock)
{
struct file_lock *fl = &lock->fl;
__u64 len, start;
__s64 end;
if (!(p = xdr_decode_string_inplace(p, &lock->caller,
&lock->len, NLM_MAXSTRLEN))
|| !(p = nlm4_decode_fh(p, &lock->fh))
|| !(p = nlm4_decode_oh(p, &lock->oh)))
return NULL;
lock->svid = ntohl(*p++);
locks_init_lock(fl);
fl->fl_flags = FL_POSIX;
fl->fl_type = F_RDLCK; /* as good as anything else */
p = xdr_decode_hyper(p, &start);
p = xdr_decode_hyper(p, &len);
end = start + len - 1;
fl->fl_start = s64_to_loff_t(start);
if (len == 0 || end < 0)
fl->fl_end = OFFSET_MAX;
else
fl->fl_end = s64_to_loff_t(end);
return p;
}
static bool
svcxdr_decode_lock(struct xdr_stream *xdr, struct nlm_lock *lock)
{
@ -310,6 +280,21 @@ nlm4svc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p)
return 1;
}
int
nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p)
{
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
struct nlm_args *argp = rqstp->rq_argp;
if (!svcxdr_decode_cookie(xdr, &argp->cookie))
return 0;
if (!svcxdr_decode_lock(xdr, &argp->lock))
return 0;
argp->lock.fl.fl_type = F_UNLCK;
return 1;
}
int
nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
{
@ -320,18 +305,6 @@ nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
return xdr_ressize_check(rqstp, p);
}
int
nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p)
{
struct nlm_args *argp = rqstp->rq_argp;
if (!(p = nlm4_decode_cookie(p, &argp->cookie))
|| !(p = nlm4_decode_lock(p, &argp->lock)))
return 0;
argp->lock.fl.fl_type = F_UNLCK;
return xdr_argsize_check(rqstp, p);
}
int
nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p)
{