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nfs: Remove unneeded checking of the return value from scnprintf

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The return value from scnprintf always less than the buffer length.
So, result >= len always false. This patch removes those checking.

int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
        int i;

	i = vsnprintf(buf, size, fmt, args);

	if (likely(i < size))
		return i;
	if (size != 0)
		return size - 1;
	return 0;
}

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Kinglong Mee 2015-08-31 10:53:43 +08:00 committed by Trond Myklebust
parent 4a70316cae
commit 4a3e5779cf
1 changed files with 1 additions and 18 deletions
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19
fs/nfs/nfs4proc.c
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@ -5014,11 +5014,10 @@ nfs4_init_nonuniform_client_string(struct nfs_client *clp)
int result;
size_t len;
char *str;
bool retried = false;
if (clp->cl_owner_id != NULL)
return 0;
retry:
rcu_read_lock();
len = 14 + strlen(clp->cl_ipaddr) + 1 +
strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
@ -5046,14 +5045,6 @@ retry:
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
rcu_read_unlock();
/* Did something change? */
if (result >= len) {
kfree(str);
if (retried)
return -EINVAL;
retried = true;
goto retry;
}
clp->cl_owner_id = str;
return 0;
}
@ -5085,10 +5076,6 @@ nfs4_init_uniquifier_client_string(struct nfs_client *clp)
clp->rpc_ops->version, clp->cl_minorversion,
nfs4_client_id_uniquifier,
clp->cl_rpcclient->cl_nodename);
if (result >= len) {
kfree(str);
return -EINVAL;
}
clp->cl_owner_id = str;
return 0;
}
@ -5124,10 +5111,6 @@ nfs4_init_uniform_client_string(struct nfs_client *clp)
result = scnprintf(str, len, "Linux NFSv%u.%u %s",
clp->rpc_ops->version, clp->cl_minorversion,
clp->cl_rpcclient->cl_nodename);
if (result >= len) {
kfree(str);
return -EINVAL;
}
clp->cl_owner_id = str;
return 0;
}