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Commit 4cd5dc75 authored by Chuck Lever's avatar Chuck Lever Committed by J. Bruce Fields
Browse files

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: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
parent abc5c44d

fs/nfsd/nfsctl.c

+29 −24
Original line number Diff line number Diff line
@@ -910,6 +910,31 @@ static ssize_t write_versions(struct file *file, char *buf, size_t size) 
	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)

{

	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;

		}

	}

	/*

	 * Remove a transport by writing it's transport name and port number

	 */

	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;

		}

	}



	if (buf[0] == '-' && isalpha(buf[1]))

		return __write_ports_delxprt(buf);



	return -EINVAL;

}