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NFSD: Refactor transport addition out of __write_ports()

Browse source 
Clean up: Refactor transport addition 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 19:31:40 -04:00 committed by J. Bruce Fields
parent 4cd5dc751a
commit 4eb68c266c
1 changed files with 33 additions and 23 deletions
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56
fs/nfsd/nfsctl.c
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@ -910,6 +910,36 @@ static ssize_t write_versions(struct file *file, char *buf, size_t size)
return rv;
}
/*
* A transport listener is added by writing it's transport name and
* a port number.
*/
static ssize_t __write_ports_addxprt(char *buf)
{
char transport[16];
int port, err;
if (sscanf(buf, "%15s %4u", transport, &port) != 2)
return -EINVAL;
if (port < 1 || port > USHORT_MAX)
return -EINVAL;
err = nfsd_create_serv();
if (err != 0)
return err;
err = svc_create_xprt(nfsd_serv, transport,
PF_INET, port, SVC_SOCK_ANONYMOUS);
if (err < 0) {
/* Give a reasonable perror msg for bad transport string */
if (err == -ENOENT)
err = -EPROTONOSUPPORT;
return err;
}
return 0;
}
/*
* A transport listener is removed by writing a "-", it's transport
* name, and it's port number.
@ -986,29 +1016,9 @@ static ssize_t __write_ports(struct file *file, char *buf, size_t size)
kfree(toclose);
return len;
}
/*
* Add a transport listener by writing it's transport name
*/
if (isalpha(buf[0])) {
int err;
char transport[16];
int port;
if (sscanf(buf, "%15s %4d", transport, &port) == 2) {
if (port < 1 || port > 65535)
return -EINVAL;
err = nfsd_create_serv();
if (!err) {
err = svc_create_xprt(nfsd_serv,
transport, PF_INET, port,
SVC_SOCK_ANONYMOUS);
if (err == -ENOENT)
/* Give a reasonable perror msg for
* bad transport string */
err = -EPROTONOSUPPORT;
}
return err < 0 ? err : 0;
}
}
if (isalpha(buf[0]))
return __write_ports_addxprt(buf);
if (buf[0] == '-' && isalpha(buf[1]))
return __write_ports_delxprt(buf);