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NFSD: Refactor transport removal out of __write_ports() 

Clean up: Refactor transport removal out of __write_ports() to make it
easier to understand and maintain.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Chuck Lever 2009-04-23 19:31:32 -04:00 committed by J. Bruce Fields
parent abc5c44d62
commit 4cd5dc751a
1 changed files with 29 additions and 24 deletions
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53
fs/nfsd/nfsctl.c
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@ -910,6 +910,31 @@ static ssize_t write_versions(struct file *file, char *buf, size_t size)
return rv; return rv;
} }
/*
* A transport listener is removed by writing a "-", it's transport
* name, and it's port number.
*/
static ssize_t __write_ports_delxprt(char *buf)
{
struct svc_xprt *xprt;
char transport[16];
int port;
if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
return -EINVAL;
if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL)
return -EINVAL;
xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
if (xprt == NULL)
return -ENOTCONN;
svc_close_xprt(xprt);
svc_xprt_put(xprt);
return 0;
}
static ssize_t __write_ports(struct file *file, char *buf, size_t size) static ssize_t __write_ports(struct file *file, char *buf, size_t size)
{ {
if (size == 0) { if (size == 0) {
@ -984,30 +1009,10 @@ static ssize_t __write_ports(struct file *file, char *buf, size_t size)
return err < 0 ? err : 0; return err < 0 ? err : 0;
} }
} }
/*
* Remove a transport by writing it's transport name and port number if (buf[0] == '-' && isalpha(buf[1]))
*/ return __write_ports_delxprt(buf);
if (buf[0] == '-' && isalpha(buf[1])) {
struct svc_xprt *xprt;
int err = -EINVAL;
char transport[16];
int port;
if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) {
if (port < 1 || port > 65535)
return -EINVAL;
if (nfsd_serv) {
xprt = svc_find_xprt(nfsd_serv, transport,
AF_UNSPEC, port);
if (xprt) {
svc_close_xprt(xprt);
svc_xprt_put(xprt);
err = 0;
} else
err = -ENOTCONN;
}
return err < 0 ? err : 0;
}
}
return -EINVAL; return -EINVAL;
} }