static ssize_t write_getfs(struct file *file, char *buf, size_t size)
{
struct nfsctl_fsparm *data;
struct sockaddr_in *sin;
struct auth_domain *clp;
int err = 0;
struct knfsd_fh *res;
if (size < sizeof(*data))
return -EINVAL;
data = (struct nfsctl_fsparm*)buf;
err = -EPROTONOSUPPORT;
if (data->gd_addr.sa_family != AF_INET)
goto out;
sin = (struct sockaddr_in *)&data->gd_addr;
if (data->gd_maxlen > NFS3_FHSIZE)
data->gd_maxlen = NFS3_FHSIZE;
res = (struct knfsd_fh*)buf;
exp_readlock();
if (!(clp = auth_unix_lookup(sin->sin_addr)))
err = -EPERM;
else {
err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
auth_domain_put(clp);
}
exp_readunlock();
if (err == 0)
err = res->fh_size + (int)&((struct knfsd_fh*)0)->fh_base;
out:
return err;
}
static inline int
nfsctl_getfh(struct nfsctl_fhparm *data, __u8 *res)
{
struct sockaddr_in *sin;
struct svc_client *clp;
int err = 0;
struct knfsd_fh fh;
if (data->gf_addr.sa_family != AF_INET)
return -EPROTONOSUPPORT;
if (data->gf_version < 2 || data->gf_version > NFSSVC_MAXVERS)
return -EINVAL;
sin = (struct sockaddr_in *)&data->gf_addr;
exp_readlock();
if (!(clp = exp_getclient(sin)))
err = -EPERM;
else
err = exp_rootfh(clp, to_kdev_t(data->gf_dev), data->gf_ino, NULL, &fh, NFS_FHSIZE);
exp_unlock();
if (err == 0) {
if (fh.fh_size > NFS_FHSIZE)
err = -EINVAL;
else {
memset(res,0, NFS_FHSIZE);
memcpy(res, &fh.fh_base, fh.fh_size);
}
}
return err;
}
static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
{
/* request is:
* domain path maxsize
* response is
* filehandle
*
* qword quoting is used, so filehandle will be \x....
*/
char *dname, *path;
int 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;
path = dname+len+1;
len = qword_get(&mesg, path, size);
if (len <= 0) return -EINVAL;
len = get_int(&mesg, &maxsize);
if (len)
return len;
if (maxsize < NFS_FHSIZE)
return -EINVAL;
if (maxsize > NFS3_FHSIZE)
maxsize = NFS3_FHSIZE;
if (qword_get(&mesg, mesg, size)>0)
return -EINVAL;
/* we have all the words, they are in buf.. */
dom = unix_domain_find(dname);
if (!dom)
return -ENOMEM;
len = exp_rootfh(dom, path, &fh, maxsize);
auth_domain_put(dom);
if (len)
return len;
mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
mesg[-1] = '\n';
return mesg - buf;
}
static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
{
char *dname, *path;
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;
path = dname+len+1;
len = qword_get(&mesg, path, size);
if (len <= 0)
return -EINVAL;
len = get_int(&mesg, &maxsize);
if (len)
return len;
if (maxsize < NFS_FHSIZE)
return -EINVAL;
if (maxsize > NFS3_FHSIZE)
maxsize = NFS3_FHSIZE;
if (qword_get(&mesg, mesg, size)>0)
return -EINVAL;
dom = unix_domain_find(dname);
if (!dom)
return -ENOMEM;
len = exp_rootfh(dom, path, &fh, maxsize);
auth_domain_put(dom);
if (len)
return len;
mesg = buf;
len = SIMPLE_TRANSACTION_LIMIT;
qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
mesg[-1] = '\n';
return mesg - buf;
}
/**
* 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;
struct sockaddr_in *sin;
struct auth_domain *clp;
int err = 0;
struct knfsd_fh fh;
char *res;
struct in6_addr in6;
if (size < sizeof(*data))
return -EINVAL;
data = (struct nfsctl_fdparm*)buf;
err = -EPROTONOSUPPORT;
if (data->gd_addr.sa_family != AF_INET)
goto out;
err = -EINVAL;
if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
goto out;
res = buf;
sin = (struct sockaddr_in *)&data->gd_addr;
exp_readlock();
ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
clp = auth_unix_lookup(&init_net, &in6);
if (!clp)
err = -EPERM;
else {
err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
auth_domain_put(clp);
}
exp_readunlock();
if (err == 0) {
memset(res,0, NFS_FHSIZE);
memcpy(res, &fh.fh_base, fh.fh_size);
err = NFS_FHSIZE;
}
out:
return err;
}
static inline int
nfsctl_getfs(struct nfsctl_fsparm *data, struct knfsd_fh *res)
{
struct sockaddr_in *sin;
struct svc_client *clp;
int err = 0;
if (data->gd_addr.sa_family != AF_INET)
return -EPROTONOSUPPORT;
sin = (struct sockaddr_in *)&data->gd_addr;
if (data->gd_maxlen > NFS3_FHSIZE)
data->gd_maxlen = NFS3_FHSIZE;
exp_readlock();
if (!(clp = exp_getclient(sin)))
err = -EPERM;
else
err = exp_rootfh(clp, 0, 0, data->gd_path, res, data->gd_maxlen);
exp_unlock();
return err;
}
