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nfsd: remove unused listener-removal interfaces

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You can use nfsd/portlist to give nfsd additional sockets to listen on.
In theory you can also remove listening sockets this way.  But nobody's
ever done that as far as I can tell.

Also this was partially broken in 2.6.25, by
a217813f90 "knfsd: Support adding
transports by writing portlist file".

(Note that we decide whether to take the "delfd" case by checking for a
digit--but what's actually expected in that case is something made by
svc_one_sock_name(), which won't begin with a digit.)

So, let's just rip out this stuff.

Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2012-08-15 18:07:43 -04:00
parent cf9182e90b
commit eccf50c129
3 changed files with 0 additions and 132 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

78
fs/nfsd/nfsctl.c
View file

@ -682,25 +682,6 @@ static ssize_t __write_ports_addfd(char *buf)
return err;
}
/*
* A '-' followed by the 'name' of a socket means we close the socket.
*/
static ssize_t __write_ports_delfd(char *buf)
{
char *toclose;
int len = 0;
toclose = kstrdup(buf + 1, GFP_KERNEL);
if (toclose == NULL)
return -ENOMEM;
if (nfsd_serv != NULL)
len = svc_sock_names(nfsd_serv, buf,
SIMPLE_TRANSACTION_LIMIT, toclose);
kfree(toclose);
return len;
}
/*
* A transport listener is added by writing it's transport name and
* a port number.
@ -746,31 +727,6 @@ static ssize_t __write_ports_addxprt(char *buf)
return err;
}
/*
* 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 > USHRT_MAX || nfsd_serv == NULL)
return -EINVAL;
xprt = svc_find_xprt(nfsd_serv, transport, &init_net, 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)
@ -779,15 +735,9 @@ static ssize_t __write_ports(struct file *file, char *buf, size_t size)
if (isdigit(buf[0]))
return __write_ports_addfd(buf);
if (buf[0] == '-' && isdigit(buf[1]))
return __write_ports_delfd(buf);
if (isalpha(buf[0]))
return __write_ports_addxprt(buf);
if (buf[0] == '-' && isalpha(buf[1]))
return __write_ports_delxprt(buf);
return -EINVAL;
}
@ -825,21 +775,6 @@ static ssize_t __write_ports(struct file *file, char *buf, size_t size)
* OR
*
* Input:
* buf: C string containing a "-" followed
* by an integer value representing a
* previously passed in socket file
* descriptor
* size: non-zero length of C string in @buf
* Output:
* On success: NFS service no longer listens on that socket;
* passed-in buffer filled with a '\n'-terminated C
* string containing a unique name of the listener;
* return code is the size in bytes of the string
* On error: return code is a negative errno value
*
* OR
*
* Input:
* buf: C string containing a transport
* name and an unsigned integer value
* representing the port to listen on,
@ -848,19 +783,6 @@ static ssize_t __write_ports(struct file *file, char *buf, size_t size)
* Output:
* On success: returns zero; NFS service is started
* On error: return code is a negative errno value
*
* OR
*
* Input:
* buf: C string containing a "-" followed
* by a transport name and an unsigned
* integer value representing the port
* to listen on, separated by whitespace
* size: non-zero length of C string in @buf
* Output:
* On success: returns zero; NFS service no longer listens
* on that transport
* On error: return code is a negative errno value
*/
static ssize_t write_ports(struct file *file, char *buf, size_t size)
{

3
include/linux/sunrpc/svcsock.h
View file

@ -39,9 +39,6 @@ int svc_recv(struct svc_rqst *, long);
int svc_send(struct svc_rqst *);
void svc_drop(struct svc_rqst *);
void svc_sock_update_bufs(struct svc_serv *serv);
int svc_sock_names(struct svc_serv *serv, char *buf,
const size_t buflen,
const char *toclose);
int svc_addsock(struct svc_serv *serv, const int fd,
char *name_return, const size_t len);
void svc_init_xprt_sock(void);

51
net/sunrpc/svcsock.c
View file

@ -305,57 +305,6 @@ static int svc_one_sock_name(struct svc_sock *svsk, char *buf, int remaining)
return len;
}
/**
* svc_sock_names - construct a list of listener names in a string
* @serv: pointer to RPC service
* @buf: pointer to a buffer to fill in with socket names
* @buflen: size of the buffer to be filled
* @toclose: pointer to '\0'-terminated C string containing the name
* of a listener to be closed
*
* Fills in @buf with a '\n'-separated list of names of listener
* sockets. If @toclose is not NULL, the socket named by @toclose
* is closed, and is not included in the output list.
*
* Returns positive length of the socket name string, or a negative
* errno value on error.
*/
int svc_sock_names(struct svc_serv *serv, char *buf, const size_t buflen,
const char *toclose)
{
struct svc_sock *svsk, *closesk = NULL;
int len = 0;
if (!serv)
return 0;
spin_lock_bh(&serv->sv_lock);
list_for_each_entry(svsk, &serv->sv_permsocks, sk_xprt.xpt_list) {
int onelen = svc_one_sock_name(svsk, buf + len, buflen - len);
if (onelen < 0) {
len = onelen;
break;
}
if (toclose && strcmp(toclose, buf + len) == 0) {
closesk = svsk;
svc_xprt_get(&closesk->sk_xprt);
} else
len += onelen;
}
spin_unlock_bh(&serv->sv_lock);
if (closesk) {
/* Should unregister with portmap, but you cannot
* unregister just one protocol...
*/
svc_close_xprt(&closesk->sk_xprt);
svc_xprt_put(&closesk->sk_xprt);
} else if (toclose)
return -ENOENT;
return len;
}
EXPORT_SYMBOL_GPL(svc_sock_names);
/*
* Check input queue length
*/