#include <linux/time.h>
#include <linux/errno.h>
#include <linux/fs.h>
+#include <linux/namei.h>
#include <linux/fcntl.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/seq_file.h>
#include <linux/pagemap.h>
#include <linux/init.h>
+#include <linux/inet.h>
#include <linux/string.h>
#include <linux/smp_lock.h>
#include <linux/ctype.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
+#include <linux/lockd/lockd.h>
#include <asm/uaccess.h>
+#include <net/ipv6.h>
/*
* We have a single directory with 9 nodes in it.
NFSD_Getfs,
NFSD_List,
NFSD_Fh,
+ NFSD_FO_UnlockIP,
+ NFSD_FO_UnlockFS,
NFSD_Threads,
NFSD_Pool_Threads,
+ NFSD_Pool_Stats,
NFSD_Versions,
NFSD_Ports,
NFSD_MaxBlkSize,
static ssize_t write_getfd(struct file *file, char *buf, size_t size);
static ssize_t write_getfs(struct file *file, char *buf, size_t size);
static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
+static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
+static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
static ssize_t write_threads(struct file *file, char *buf, size_t size);
static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
static ssize_t write_versions(struct file *file, char *buf, size_t size);
[NFSD_Getfd] = write_getfd,
[NFSD_Getfs] = write_getfs,
[NFSD_Fh] = write_filehandle,
+ [NFSD_FO_UnlockIP] = write_unlock_ip,
+ [NFSD_FO_UnlockFS] = write_unlock_fs,
[NFSD_Threads] = write_threads,
[NFSD_Pool_Threads] = write_pool_threads,
[NFSD_Versions] = write_versions,
.release = simple_transaction_release,
};
-extern struct seq_operations nfs_exports_op;
static int exports_open(struct inode *inode, struct file *file)
{
return seq_open(file, &nfs_exports_op);
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
+ .owner = THIS_MODULE,
+};
+
+extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
+
+static struct file_operations pool_stats_operations = {
+ .open = nfsd_pool_stats_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+ .owner = THIS_MODULE,
};
/*----------------------------------------------------------------------------*/
/*
* payload - write methods
- * If the method has a response, the response should be put in buf,
- * and the length returned. Otherwise return 0 or and -error.
*/
+/**
+ * write_svc - Start kernel's NFSD server
+ *
+ * Deprecated. /proc/fs/nfsd/threads is preferred.
+ * Function remains to support old versions of nfs-utils.
+ *
+ * Input:
+ * buf: struct nfsctl_svc
+ * svc_port: port number of this
+ * server's listener
+ * svc_nthreads: number of threads to start
+ * size: size in bytes of passed in nfsctl_svc
+ * Output:
+ * On success: returns zero
+ * On error: return code is negative errno value
+ */
static ssize_t write_svc(struct file *file, char *buf, size_t size)
{
struct nfsctl_svc *data;
+ int err;
if (size < sizeof(*data))
return -EINVAL;
data = (struct nfsctl_svc*) buf;
- return nfsd_svc(data->svc_port, data->svc_nthreads);
+ err = nfsd_svc(data->svc_port, data->svc_nthreads);
+ if (err < 0)
+ return err;
+ return 0;
}
+/**
+ * write_add - Add or modify client entry in auth unix cache
+ *
+ * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
+ * Function remains to support old versions of nfs-utils.
+ *
+ * Input:
+ * buf: struct nfsctl_client
+ * cl_ident: '\0'-terminated C string
+ * containing domain name
+ * of client
+ * cl_naddr: no. of items in cl_addrlist
+ * cl_addrlist: array of client addresses
+ * cl_fhkeytype: ignored
+ * cl_fhkeylen: ignored
+ * cl_fhkey: ignored
+ * size: size in bytes of passed in nfsctl_client
+ * Output:
+ * On success: returns zero
+ * On error: return code is negative errno value
+ *
+ * Note: Only AF_INET client addresses are passed in, since
+ * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
+ */
static ssize_t write_add(struct file *file, char *buf, size_t size)
{
struct nfsctl_client *data;
return exp_addclient(data);
}
+/**
+ * write_del - Remove client from auth unix cache
+ *
+ * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
+ * Function remains to support old versions of nfs-utils.
+ *
+ * Input:
+ * buf: struct nfsctl_client
+ * cl_ident: '\0'-terminated C string
+ * containing domain name
+ * of client
+ * cl_naddr: ignored
+ * cl_addrlist: ignored
+ * cl_fhkeytype: ignored
+ * cl_fhkeylen: ignored
+ * cl_fhkey: ignored
+ * size: size in bytes of passed in nfsctl_client
+ * Output:
+ * On success: returns zero
+ * On error: return code is negative errno value
+ *
+ * Note: Only AF_INET client addresses are passed in, since
+ * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
+ */
static ssize_t write_del(struct file *file, char *buf, size_t size)
{
struct nfsctl_client *data;
return exp_delclient(data);
}
+/**
+ * write_export - Export part or all of a local file system
+ *
+ * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
+ * Function remains to support old versions of nfs-utils.
+ *
+ * Input:
+ * buf: struct nfsctl_export
+ * ex_client: '\0'-terminated C string
+ * containing domain name
+ * of client allowed to access
+ * this export
+ * ex_path: '\0'-terminated C string
+ * containing pathname of
+ * directory in local file system
+ * ex_dev: fsid to use for this export
+ * ex_ino: ignored
+ * ex_flags: export flags for this export
+ * ex_anon_uid: UID to use for anonymous
+ * requests
+ * ex_anon_gid: GID to use for anonymous
+ * requests
+ * size: size in bytes of passed in nfsctl_export
+ * Output:
+ * On success: returns zero
+ * On error: return code is negative errno value
+ */
static ssize_t write_export(struct file *file, char *buf, size_t size)
{
struct nfsctl_export *data;
return exp_export(data);
}
+/**
+ * write_unexport - Unexport a previously exported file system
+ *
+ * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
+ * Function remains to support old versions of nfs-utils.
+ *
+ * Input:
+ * buf: struct nfsctl_export
+ * ex_client: '\0'-terminated C string
+ * containing domain name
+ * of client no longer allowed
+ * to access this export
+ * ex_path: '\0'-terminated C string
+ * containing pathname of
+ * directory in local file system
+ * ex_dev: ignored
+ * ex_ino: ignored
+ * ex_flags: ignored
+ * ex_anon_uid: ignored
+ * ex_anon_gid: ignored
+ * size: size in bytes of passed in nfsctl_export
+ * Output:
+ * On success: returns zero
+ * On error: return code is negative errno value
+ */
static ssize_t write_unexport(struct file *file, char *buf, size_t size)
{
struct nfsctl_export *data;
return exp_unexport(data);
}
+/**
+ * write_getfs - Get a variable-length NFS file handle by path
+ *
+ * Deprecated. /proc/fs/nfsd/filehandle is preferred.
+ * Function remains to support old versions of nfs-utils.
+ *
+ * Input:
+ * buf: struct nfsctl_fsparm
+ * gd_addr: socket address of client
+ * gd_path: '\0'-terminated C string
+ * containing pathname of
+ * directory in local file system
+ * gd_maxlen: maximum size of returned file
+ * handle
+ * size: size in bytes of passed in nfsctl_fsparm
+ * Output:
+ * On success: passed-in buffer filled with a knfsd_fh structure
+ * (a variable-length raw NFS file handle);
+ * return code is the size in bytes of the file handle
+ * On error: return code is negative errno value
+ *
+ * Note: Only AF_INET client addresses are passed in, since gd_addr
+ * is the same size as a struct sockaddr_in.
+ */
static ssize_t write_getfs(struct file *file, char *buf, size_t size)
{
struct nfsctl_fsparm *data;
struct auth_domain *clp;
int err = 0;
struct knfsd_fh *res;
+ struct in6_addr in6;
if (size < sizeof(*data))
return -EINVAL;
res = (struct knfsd_fh*)buf;
exp_readlock();
- if (!(clp = auth_unix_lookup(sin->sin_addr)))
+
+ ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
+
+ clp = auth_unix_lookup(&in6);
+ if (!clp)
err = -EPERM;
else {
err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
return err;
}
+/**
+ * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
+ *
+ * Deprecated. /proc/fs/nfsd/filehandle is preferred.
+ * Function remains to support old versions of nfs-utils.
+ *
+ * Input:
+ * buf: struct nfsctl_fdparm
+ * gd_addr: socket address of client
+ * gd_path: '\0'-terminated C string
+ * containing pathname of
+ * directory in local file system
+ * gd_version: fdparm structure version
+ * size: size in bytes of passed in nfsctl_fdparm
+ * Output:
+ * On success: passed-in buffer filled with nfsctl_res
+ * (a fixed-length raw NFS file handle);
+ * return code is the size in bytes of the file handle
+ * On error: return code is negative errno value
+ *
+ * Note: Only AF_INET client addresses are passed in, since gd_addr
+ * is the same size as a struct sockaddr_in.
+ */
static ssize_t write_getfd(struct file *file, char *buf, size_t size)
{
struct nfsctl_fdparm *data;
int err = 0;
struct knfsd_fh fh;
char *res;
+ struct in6_addr in6;
if (size < sizeof(*data))
return -EINVAL;
res = buf;
sin = (struct sockaddr_in *)&data->gd_addr;
exp_readlock();
- if (!(clp = auth_unix_lookup(sin->sin_addr)))
+
+ ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
+
+ clp = auth_unix_lookup(&in6);
+ if (!clp)
err = -EPERM;
else {
err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
return err;
}
-static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
+/**
+ * write_unlock_ip - Release all locks used by a client
+ *
+ * Experimental.
+ *
+ * Input:
+ * buf: '\n'-terminated C string containing a
+ * presentation format IPv4 address
+ * size: length of C string in @buf
+ * Output:
+ * On success: returns zero if all specified locks were released;
+ * returns one if one or more locks were not released
+ * On error: return code is negative errno value
+ *
+ * Note: Only AF_INET client addresses are passed in
+ */
+static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
{
- /* request is:
- * domain path maxsize
- * response is
- * filehandle
+ struct sockaddr_in sin = {
+ .sin_family = AF_INET,
+ };
+ int b1, b2, b3, b4;
+ char c;
+ char *fo_path;
+
+ /* sanity check */
+ if (size == 0)
+ return -EINVAL;
+
+ if (buf[size-1] != '\n')
+ return -EINVAL;
+
+ fo_path = buf;
+ if (qword_get(&buf, fo_path, size) < 0)
+ return -EINVAL;
+
+ /* get ipv4 address */
+ if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4)
+ return -EINVAL;
+ if (b1 > 255 || b2 > 255 || b3 > 255 || b4 > 255)
+ return -EINVAL;
+ sin.sin_addr.s_addr = htonl((b1 << 24) | (b2 << 16) | (b3 << 8) | b4);
+
+ return nlmsvc_unlock_all_by_ip((struct sockaddr *)&sin);
+}
+
+/**
+ * write_unlock_fs - Release all locks on a local file system
+ *
+ * Experimental.
+ *
+ * Input:
+ * buf: '\n'-terminated C string containing the
+ * absolute pathname of a local file system
+ * size: length of C string in @buf
+ * Output:
+ * On success: returns zero if all specified locks were released;
+ * returns one if one or more locks were not released
+ * On error: return code is negative errno value
+ */
+static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
+{
+ struct path path;
+ char *fo_path;
+ int error;
+
+ /* sanity check */
+ if (size == 0)
+ return -EINVAL;
+
+ if (buf[size-1] != '\n')
+ return -EINVAL;
+
+ fo_path = buf;
+ if (qword_get(&buf, fo_path, size) < 0)
+ return -EINVAL;
+
+ error = kern_path(fo_path, 0, &path);
+ if (error)
+ return error;
+
+ /*
+ * XXX: Needs better sanity checking. Otherwise we could end up
+ * releasing locks on the wrong file system.
*
- * qword quoting is used, so filehandle will be \x....
+ * For example:
+ * 1. Does the path refer to a directory?
+ * 2. Is that directory a mount point, or
+ * 3. Is that directory the root of an exported file system?
*/
+ error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb);
+
+ path_put(&path);
+ return error;
+}
+
+/**
+ * write_filehandle - Get a variable-length NFS file handle by path
+ *
+ * On input, the buffer contains a '\n'-terminated C string comprised of
+ * three alphanumeric words separated by whitespace. The string may
+ * contain escape sequences.
+ *
+ * Input:
+ * buf:
+ * domain: client domain name
+ * path: export pathname
+ * maxsize: numeric maximum size of
+ * @buf
+ * size: length of C string in @buf
+ * Output:
+ * On success: passed-in buffer filled with '\n'-terminated C
+ * string containing a ASCII hex text version
+ * of the NFS file handle;
+ * return code is the size in bytes of the string
+ * On error: return code is negative errno value
+ */
+static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
+{
char *dname, *path;
- int maxsize;
+ int uninitialized_var(maxsize);
char *mesg = buf;
int len;
struct auth_domain *dom;
struct knfsd_fh fh;
+ if (size == 0)
+ return -EINVAL;
+
if (buf[size-1] != '\n')
return -EINVAL;
buf[size-1] = 0;
dname = mesg;
len = qword_get(&mesg, dname, size);
- if (len <= 0) return -EINVAL;
+ if (len <= 0)
+ return -EINVAL;
path = dname+len+1;
len = qword_get(&mesg, path, size);
- if (len <= 0) return -EINVAL;
+ if (len <= 0)
+ return -EINVAL;
len = get_int(&mesg, &maxsize);
if (len)
if (len)
return len;
- mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
+ mesg = buf;
+ len = SIMPLE_TRANSACTION_LIMIT;
qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
mesg[-1] = '\n';
return mesg - buf;
}
-extern int nfsd_nrthreads(void);
-
+/**
+ * write_threads - Start NFSD, or report the current number of running threads
+ *
+ * Input:
+ * buf: ignored
+ * size: zero
+ * Output:
+ * On success: passed-in buffer filled with '\n'-terminated C
+ * string numeric value representing the number of
+ * running NFSD threads;
+ * return code is the size in bytes of the string
+ * On error: return code is zero
+ *
+ * OR
+ *
+ * Input:
+ * buf: C string containing an unsigned
+ * integer value representing the
+ * number of NFSD threads to start
+ * size: non-zero length of C string in @buf
+ * Output:
+ * On success: NFS service is started;
+ * passed-in buffer filled with '\n'-terminated C
+ * string numeric value representing the number of
+ * running NFSD threads;
+ * return code is the size in bytes of the string
+ * On error: return code is zero or a negative errno value
+ */
static ssize_t write_threads(struct file *file, char *buf, size_t size)
{
- /* if size > 0, look for a number of threads and call nfsd_svc
- * then write out number of threads as reply
- */
char *mesg = buf;
int rv;
if (size > 0) {
rv = get_int(&mesg, &newthreads);
if (rv)
return rv;
- if (newthreads <0)
+ if (newthreads < 0)
return -EINVAL;
- rv = nfsd_svc(2049, newthreads);
- if (rv)
+ rv = nfsd_svc(NFS_PORT, newthreads);
+ if (rv < 0)
return rv;
- }
- sprintf(buf, "%d\n", nfsd_nrthreads());
- return strlen(buf);
-}
+ } else
+ rv = nfsd_nrthreads();
-extern int nfsd_nrpools(void);
-extern int nfsd_get_nrthreads(int n, int *);
-extern int nfsd_set_nrthreads(int n, int *);
+ return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
+}
+/**
+ * write_pool_threads - Set or report the current number of threads per pool
+ *
+ * Input:
+ * buf: ignored
+ * size: zero
+ *
+ * OR
+ *
+ * Input:
+ * buf: C string containing whitespace-
+ * separated unsigned integer values
+ * representing the number of NFSD
+ * threads to start in each pool
+ * size: non-zero length of C string in @buf
+ * Output:
+ * On success: passed-in buffer filled with '\n'-terminated C
+ * string containing integer values representing the
+ * number of NFSD threads in each pool;
+ * return code is the size in bytes of the string
+ * On error: return code is zero or a negative errno value
+ */
static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
{
/* if size > 0, look for an array of number of threads per node
int i;
int rv;
int len;
- int npools = nfsd_nrpools();
+ int npools;
int *nthreads;
+ mutex_lock(&nfsd_mutex);
+ npools = nfsd_nrpools();
if (npools == 0) {
/*
* NFS is shut down. The admin can start it by
* writing to the threads file but NOT the pool_threads
* file, sorry. Report zero threads.
*/
+ mutex_unlock(&nfsd_mutex);
strcpy(buf, "0\n");
return strlen(buf);
}
nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
+ rv = -ENOMEM;
if (nthreads == NULL)
- return -ENOMEM;
+ goto out_free;
if (size > 0) {
for (i = 0; i < npools; i++) {
size -= len;
mesg += len;
}
-
- return (mesg-buf);
-
+ rv = mesg - buf;
out_free:
kfree(nthreads);
+ mutex_unlock(&nfsd_mutex);
return rv;
}
-static ssize_t write_versions(struct file *file, char *buf, size_t size)
+static ssize_t __write_versions(struct file *file, char *buf, size_t size)
{
- /*
- * Format:
- * [-/+]vers [-/+]vers ...
- */
char *mesg = buf;
- char *vers, sign;
- int len, num;
+ char *vers, *minorp, sign;
+ int len, num, remaining;
+ unsigned minor;
ssize_t tlen = 0;
char *sep;
do {
sign = *vers;
if (sign == '+' || sign == '-')
- num = simple_strtol((vers+1), NULL, 0);
+ num = simple_strtol((vers+1), &minorp, 0);
else
- num = simple_strtol(vers, NULL, 0);
+ num = simple_strtol(vers, &minorp, 0);
+ if (*minorp == '.') {
+ if (num < 4)
+ return -EINVAL;
+ minor = simple_strtoul(minorp+1, NULL, 0);
+ if (minor == 0)
+ return -EINVAL;
+ if (nfsd_minorversion(minor, sign == '-' ?
+ NFSD_CLEAR : NFSD_SET) < 0)
+ return -EINVAL;
+ goto next;
+ }
switch(num) {
case 2:
case 3:
default:
return -EINVAL;
}
+ next:
vers += len + 1;
- tlen += len;
} while ((len = qword_get(&mesg, vers, size)) > 0);
/* If all get turned off, turn them back on, as
* having no versions is BAD
*/
nfsd_reset_versions();
}
+
/* Now write current state into reply buffer */
len = 0;
sep = "";
+ remaining = SIMPLE_TRANSACTION_LIMIT;
for (num=2 ; num <= 4 ; num++)
if (nfsd_vers(num, NFSD_AVAIL)) {
- len += sprintf(buf+len, "%s%c%d", sep,
+ len = snprintf(buf, remaining, "%s%c%d", sep,
nfsd_vers(num, NFSD_TEST)?'+':'-',
num);
sep = " ";
+
+ if (len > remaining)
+ break;
+ remaining -= len;
+ buf += len;
+ tlen += len;
}
- len += sprintf(buf+len, "\n");
+ if (nfsd_vers(4, NFSD_AVAIL))
+ for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
+ minor++) {
+ len = snprintf(buf, remaining, " %c4.%u",
+ (nfsd_vers(4, NFSD_TEST) &&
+ nfsd_minorversion(minor, NFSD_TEST)) ?
+ '+' : '-',
+ minor);
+
+ if (len > remaining)
+ break;
+ remaining -= len;
+ buf += len;
+ tlen += len;
+ }
+
+ len = snprintf(buf, remaining, "\n");
+ if (len > remaining)
+ return -EINVAL;
+ return tlen + len;
+}
+
+/**
+ * write_versions - Set or report the available NFS protocol versions
+ *
+ * Input:
+ * buf: ignored
+ * size: zero
+ * Output:
+ * On success: passed-in buffer filled with '\n'-terminated C
+ * string containing positive or negative integer
+ * values representing the current status of each
+ * protocol version;
+ * return code is the size in bytes of the string
+ * On error: return code is zero or a negative errno value
+ *
+ * OR
+ *
+ * Input:
+ * buf: C string containing whitespace-
+ * separated positive or negative
+ * integer values representing NFS
+ * protocol versions to enable ("+n")
+ * or disable ("-n")
+ * size: non-zero length of C string in @buf
+ * Output:
+ * On success: status of zero or more protocol versions has
+ * been updated; passed-in buffer filled with
+ * '\n'-terminated C string containing positive
+ * or negative integer values representing the
+ * current status of each protocol version;
+ * return code is the size in bytes of the string
+ * On error: return code is zero or a negative errno value
+ */
+static ssize_t write_versions(struct file *file, char *buf, size_t size)
+{
+ ssize_t rv;
+
+ mutex_lock(&nfsd_mutex);
+ rv = __write_versions(file, buf, size);
+ mutex_unlock(&nfsd_mutex);
+ return rv;
+}
+
+/*
+ * Zero-length write. Return a list of NFSD's current listener
+ * transports.
+ */
+static ssize_t __write_ports_names(char *buf)
+{
+ if (nfsd_serv == NULL)
+ return 0;
+ return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
+}
+
+/*
+ * A single 'fd' number was written, in which case it must be for
+ * a socket of a supported family/protocol, and we use it as an
+ * nfsd listener.
+ */
+static ssize_t __write_ports_addfd(char *buf)
+{
+ char *mesg = buf;
+ int fd, err;
+
+ err = get_int(&mesg, &fd);
+ if (err != 0 || fd < 0)
+ return -EINVAL;
+
+ err = nfsd_create_serv();
+ if (err != 0)
+ return err;
+
+ err = lockd_up();
+ if (err != 0)
+ goto out;
+
+ err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
+ if (err < 0)
+ lockd_down();
+
+out:
+ /* Decrease the count, but don't shut down the service */
+ nfsd_serv->sv_nrthreads--;
+ 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);
+ if (len >= 0)
+ lockd_down();
+
+ kfree(toclose);
return len;
}
-static ssize_t write_ports(struct file *file, char *buf, size_t size)
+/*
+ * A transport listener is added by writing it's transport name and
+ * a port number.
+ */
+static ssize_t __write_ports_addxprt(char *buf)
{
- if (size == 0) {
- int len = 0;
- lock_kernel();
- if (nfsd_serv)
- len = svc_sock_names(buf, nfsd_serv, NULL);
- unlock_kernel();
- return len;
- }
- /* Either a single 'fd' number is written, in which
- * case it must be for a socket of a supported family/protocol,
- * and we use it as an nfsd socket, or
- * A '-' followed by the 'name' of a socket in which case
- * we close the socket.
- */
- if (isdigit(buf[0])) {
- char *mesg = buf;
- int fd;
- int err;
- err = get_int(&mesg, &fd);
- if (err)
- return -EINVAL;
- if (fd < 0)
- return -EINVAL;
- err = nfsd_create_serv();
- if (!err) {
- int proto = 0;
- err = svc_addsock(nfsd_serv, fd, buf, &proto);
- if (err >= 0) {
- err = lockd_up(proto);
- if (err < 0)
- svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf);
- }
- /* Decrease the count, but don't shutdown the
- * the service
- */
- lock_kernel();
- nfsd_serv->sv_nrthreads--;
- unlock_kernel();
- }
- return err < 0 ? err : 0;
- }
- if (buf[0] == '-') {
- char *toclose = kstrdup(buf+1, GFP_KERNEL);
- int len = 0;
- if (!toclose)
- return -ENOMEM;
- lock_kernel();
- if (nfsd_serv)
- len = svc_sock_names(buf, nfsd_serv, toclose);
- unlock_kernel();
- if (len >= 0)
- lockd_down();
- kfree(toclose);
- return len;
+ 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.
+ */
+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)
+ return __write_ports_names(buf);
+
+ 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;
}
+/**
+ * write_ports - Pass a socket file descriptor or transport name to listen on
+ *
+ * Input:
+ * buf: ignored
+ * size: zero
+ * Output:
+ * On success: passed-in buffer filled with a '\n'-terminated C
+ * string containing a whitespace-separated list of
+ * named NFSD listeners;
+ * return code is the size in bytes of the string
+ * On error: return code is zero or a negative errno value
+ *
+ * OR
+ *
+ * Input:
+ * buf: C string containing an unsigned
+ * integer value representing a bound
+ * but unconnected socket that is to be
+ * used as an NFSD listener; listen(3)
+ * must be called for a SOCK_STREAM
+ * socket, otherwise it is ignored
+ * size: non-zero length of C string in @buf
+ * Output:
+ * On success: NFS service is started;
+ * passed-in buffer filled with a '\n'-terminated C
+ * string containing a unique alphanumeric 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 "-" 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,
+ * separated by whitespace
+ * size: non-zero length of C string in @buf
+ * 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)
+{
+ ssize_t rv;
+
+ mutex_lock(&nfsd_mutex);
+ rv = __write_ports(file, buf, size);
+ mutex_unlock(&nfsd_mutex);
+ return rv;
+}
+
+
int nfsd_max_blksize;
+/**
+ * write_maxblksize - Set or report the current NFS blksize
+ *
+ * Input:
+ * buf: ignored
+ * size: zero
+ *
+ * OR
+ *
+ * Input:
+ * buf: C string containing an unsigned
+ * integer value representing the new
+ * NFS blksize
+ * size: non-zero length of C string in @buf
+ * Output:
+ * On success: passed-in buffer filled with '\n'-terminated C string
+ * containing numeric value of the current NFS blksize
+ * setting;
+ * return code is the size in bytes of the string
+ * On error: return code is zero or a negative errno value
+ */
static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
{
char *mesg = buf;
if (bsize > NFSSVC_MAXBLKSIZE)
bsize = NFSSVC_MAXBLKSIZE;
bsize &= ~(1024-1);
- lock_kernel();
+ mutex_lock(&nfsd_mutex);
if (nfsd_serv && nfsd_serv->sv_nrthreads) {
- unlock_kernel();
+ mutex_unlock(&nfsd_mutex);
return -EBUSY;
}
nfsd_max_blksize = bsize;
- unlock_kernel();
+ mutex_unlock(&nfsd_mutex);
}
- return sprintf(buf, "%d\n", nfsd_max_blksize);
+
+ return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
+ nfsd_max_blksize);
}
#ifdef CONFIG_NFSD_V4
extern time_t nfs4_leasetime(void);
-static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
+static ssize_t __write_leasetime(struct file *file, char *buf, size_t size)
{
/* if size > 10 seconds, call
* nfs4_reset_lease() then write out the new lease (seconds) as reply
*/
char *mesg = buf;
- int rv;
+ int rv, lease;
if (size > 0) {
- int lease;
+ if (nfsd_serv)
+ return -EBUSY;
rv = get_int(&mesg, &lease);
if (rv)
return rv;
return -EINVAL;
nfs4_reset_lease(lease);
}
- sprintf(buf, "%ld\n", nfs4_lease_time());
- return strlen(buf);
+
+ return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n",
+ nfs4_lease_time());
}
-static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
+/**
+ * write_leasetime - Set or report the current NFSv4 lease time
+ *
+ * Input:
+ * buf: ignored
+ * size: zero
+ *
+ * OR
+ *
+ * Input:
+ * buf: C string containing an unsigned
+ * integer value representing the new
+ * NFSv4 lease expiry time
+ * size: non-zero length of C string in @buf
+ * Output:
+ * On success: passed-in buffer filled with '\n'-terminated C
+ * string containing unsigned integer value of the
+ * current lease expiry time;
+ * return code is the size in bytes of the string
+ * On error: return code is zero or a negative errno value
+ */
+static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
+{
+ ssize_t rv;
+
+ mutex_lock(&nfsd_mutex);
+ rv = __write_leasetime(file, buf, size);
+ mutex_unlock(&nfsd_mutex);
+ return rv;
+}
+
+extern char *nfs4_recoverydir(void);
+
+static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
{
char *mesg = buf;
char *recdir;
int len, status;
- if (size > PATH_MAX || buf[size-1] != '\n')
- return -EINVAL;
- buf[size-1] = 0;
+ if (size > 0) {
+ if (nfsd_serv)
+ return -EBUSY;
+ if (size > PATH_MAX || buf[size-1] != '\n')
+ return -EINVAL;
+ buf[size-1] = 0;
- recdir = mesg;
- len = qword_get(&mesg, recdir, size);
- if (len <= 0)
- return -EINVAL;
+ recdir = mesg;
+ len = qword_get(&mesg, recdir, size);
+ if (len <= 0)
+ return -EINVAL;
+
+ status = nfs4_reset_recoverydir(recdir);
+ }
- status = nfs4_reset_recoverydir(recdir);
- return strlen(buf);
+ return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
+ nfs4_recoverydir());
}
+
+/**
+ * write_recoverydir - Set or report the pathname of the recovery directory
+ *
+ * Input:
+ * buf: ignored
+ * size: zero
+ *
+ * OR
+ *
+ * Input:
+ * buf: C string containing the pathname
+ * of the directory on a local file
+ * system containing permanent NFSv4
+ * recovery data
+ * size: non-zero length of C string in @buf
+ * Output:
+ * On success: passed-in buffer filled with '\n'-terminated C string
+ * containing the current recovery pathname setting;
+ * return code is the size in bytes of the string
+ * On error: return code is zero or a negative errno value
+ */
+static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
+{
+ ssize_t rv;
+
+ mutex_lock(&nfsd_mutex);
+ rv = __write_recoverydir(file, buf, size);
+ mutex_unlock(&nfsd_mutex);
+ return rv;
+}
+
#endif
/*----------------------------------------------------------------------------*/
[NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_List] = {"exports", &exports_operations, S_IRUGO},
+ [NFSD_FO_UnlockIP] = {"unlock_ip",
+ &transaction_ops, S_IWUSR|S_IRUSR},
+ [NFSD_FO_UnlockFS] = {"unlock_filesystem",
+ &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
+ [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
[NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
[NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
.kill_sb = kill_litter_super,
};
+#ifdef CONFIG_PROC_FS
+static int create_proc_exports_entry(void)
+{
+ struct proc_dir_entry *entry;
+
+ entry = proc_mkdir("fs/nfs", NULL);
+ if (!entry)
+ return -ENOMEM;
+ entry = proc_create("exports", 0, entry, &exports_operations);
+ if (!entry)
+ return -ENOMEM;
+ return 0;
+}
+#else /* CONFIG_PROC_FS */
+static int create_proc_exports_entry(void)
+{
+ return 0;
+}
+#endif
+
static int __init init_nfsd(void)
{
int retval;
printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
+ retval = nfs4_state_init(); /* nfs4 locking state */
+ if (retval)
+ return retval;
nfsd_stat_init(); /* Statistics */
- nfsd_cache_init(); /* RPC reply cache */
- nfsd_export_init(); /* Exports table */
+ retval = nfsd_reply_cache_init();
+ if (retval)
+ goto out_free_stat;
+ retval = nfsd_export_init();
+ if (retval)
+ goto out_free_cache;
nfsd_lockd_init(); /* lockd->nfsd callbacks */
- nfs4_state_init(); /* NFSv4 locking state */
- nfsd_idmap_init(); /* Name to ID mapping */
- if (proc_mkdir("fs/nfs", NULL)) {
- struct proc_dir_entry *entry;
- entry = create_proc_entry("fs/nfs/exports", 0, NULL);
- if (entry)
- entry->proc_fops = &exports_operations;
- }
+ retval = nfsd_idmap_init();
+ if (retval)
+ goto out_free_lockd;
+ retval = create_proc_exports_entry();
+ if (retval)
+ goto out_free_idmap;
retval = register_filesystem(&nfsd_fs_type);
- if (retval) {
- nfsd_export_shutdown();
- nfsd_cache_shutdown();
- remove_proc_entry("fs/nfs/exports", NULL);
- remove_proc_entry("fs/nfs", NULL);
- nfsd_stat_shutdown();
- nfsd_lockd_shutdown();
- }
+ if (retval)
+ goto out_free_all;
+ return 0;
+out_free_all:
+ remove_proc_entry("fs/nfs/exports", NULL);
+ remove_proc_entry("fs/nfs", NULL);
+out_free_idmap:
+ nfsd_idmap_shutdown();
+out_free_lockd:
+ nfsd_lockd_shutdown();
+ nfsd_export_shutdown();
+out_free_cache:
+ nfsd_reply_cache_shutdown();
+out_free_stat:
+ nfsd_stat_shutdown();
+ nfsd4_free_slabs();
return retval;
}
static void __exit exit_nfsd(void)
{
nfsd_export_shutdown();
- nfsd_cache_shutdown();
+ nfsd_reply_cache_shutdown();
remove_proc_entry("fs/nfs/exports", NULL);
remove_proc_entry("fs/nfs", NULL);
nfsd_stat_shutdown();
nfsd_lockd_shutdown();
nfsd_idmap_shutdown();
+ nfsd4_free_slabs();
unregister_filesystem(&nfsd_fs_type);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff