コード例 #1
0
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;
}
コード例 #2
0
ファイル: nfsctl.c プロジェクト: 3sOx/asuswrt-merlin
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;	
}
コード例 #3
0
void expkey_put(struct cache_head *item, struct cache_detail *cd)
{
	if (cache_put(item, cd)) {
		struct svc_expkey *key = container_of(item, struct svc_expkey, h);
		if (test_bit(CACHE_VALID, &item->flags) &&
		    !test_bit(CACHE_NEGATIVE, &item->flags))
			exp_put(key->ek_export);
		auth_domain_put(key->ek_client);
		kfree(key);
	}
}
コード例 #4
0
ファイル: nfsctl.c プロジェクト: mjduddin/B14CKB1RD_kernel_m8
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;	
}
コード例 #5
0
ファイル: nfsctl.c プロジェクト: Adjustxx/Savaged-Zen
/**
 * 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;
}
コード例 #6
0
int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
{
	/* client fsidtype fsid [path] */
	char *buf;
	int len;
	struct auth_domain *dom = NULL;
	int err;
	int fsidtype;
	char *ep;
	struct svc_expkey key;

	if (mesg[mlen-1] != '\n')
		return -EINVAL;
	mesg[mlen-1] = 0;

	buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
	err = -ENOMEM;
	if (!buf) goto out;

	err = -EINVAL;
	if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
		goto out;

	err = -ENOENT;
	dom = auth_domain_find(buf);
	if (!dom)
		goto out;
	dprintk("found domain %s\n", buf);

	err = -EINVAL;
	if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
		goto out;
	fsidtype = simple_strtoul(buf, &ep, 10);
	if (*ep)
		goto out;
	dprintk("found fsidtype %d\n", fsidtype);
	if (fsidtype > 2)
		goto out;
	if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
		goto out;
	dprintk("found fsid length %d\n", len);
	if (len != key_len(fsidtype))
		goto out;

	/* OK, we seem to have a valid key */
	key.h.flags = 0;
	key.h.expiry_time = get_expiry(&mesg);
	if (key.h.expiry_time == 0)
		goto out;

	key.ek_client = dom;	
	key.ek_fsidtype = fsidtype;
	memcpy(key.ek_fsid, buf, len);

	/* now we want a pathname, or empty meaning NEGATIVE  */
	if ((len=qword_get(&mesg, buf, PAGE_SIZE)) < 0)
		goto out;
	dprintk("Path seems to be <%s>\n", buf);
	err = 0;
	if (len == 0) {
		struct svc_expkey *ek;
		set_bit(CACHE_NEGATIVE, &key.h.flags);
		ek = svc_expkey_lookup(&key, 1);
		if (ek)
			expkey_put(&ek->h, &svc_expkey_cache);
	} else {
		struct nameidata nd;
		struct svc_expkey *ek;
		struct svc_export *exp;
		err = path_lookup(buf, 0, &nd);
		if (err)
			goto out;

		dprintk("Found the path %s\n", buf);
		exp = exp_get_by_name(dom, nd.mnt, nd.dentry, NULL);

		err = -ENOENT;
		if (!exp)
			goto out_nd;
		key.ek_export = exp;
		dprintk("And found export\n");
		
		ek = svc_expkey_lookup(&key, 1);
		if (ek)
			expkey_put(&ek->h, &svc_expkey_cache);
		exp_put(exp);
		err = 0;
	out_nd:
		path_release(&nd);
	}
	cache_flush();
 out:
	if (dom)
		auth_domain_put(dom);
	if (buf)
		kfree(buf);
	return err;
}