firmware loading; ok pedro tedu dlg miod

1 files changed, 86 insertions, 0 deletions

diff --git a/sys/dev/firmload.c b/sys/dev/firmload.c
new file mode 100644
index 00000000000..d6c3a567b83
--- /dev/null
+++ b/sys/dev/firmload.c
@@ -0,0 +1,86 @@
+/*	$OpenBSD: firmload.c,v 1.1 2004/11/17 14:12:59 deraadt Exp $	*/
+
+/*
+ * Copyright (c) 2004 Theo de Raadt <deraadt@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/syslimits.h>
+#include <sys/time.h>
+#include <sys/namei.h>
+#include <sys/vnode.h>
+#include <sys/mount.h>
+#include <sys/errno.h>
+#include <sys/malloc.h>
+#include <sys/proc.h>
+#include <sys/device.h>
+
+int
+loadfirmware(const char *name, u_char **bufp, size_t *buflen)
+{
+	struct proc *p = curproc;
+	struct nameidata nid;
+	char path[MAXPATHLEN];
+	struct iovec iov;
+	struct uio uio;
+	struct vattr va;
+	int error;
+	char *ptr;
+
+	if (!rootvp || !vcount(rootvp))
+		return (EIO);
+
+	snprintf(path, sizeof path, "/etc/firmware/%s", name);
+
+	NDINIT(&nid, LOOKUP, NOFOLLOW|LOCKLEAF, UIO_SYSSPACE, path, p);
+	error = namei(&nid);
+	if (error)
+		return error;
+	error = VOP_GETATTR(nid.ni_vp, &va, p->p_ucred, p);
+	if (error)
+		goto fail;
+	if (va.va_size > FIRMWARE_MAX) {
+		error = E2BIG;
+		goto fail;
+	}
+	ptr = malloc(va.va_size, M_DEVBUF, M_NOWAIT);
+	if (ptr == NULL) {
+		error = ENOMEM;
+		goto fail;
+	}
+
+	iov.iov_base = ptr, 
+	iov.iov_len = va.va_size;
+	uio.uio_iov = &iov;
+	uio.uio_iovcnt = 1;
+	uio.uio_offset = 0;
+	uio.uio_resid = va.va_size;
+	uio.uio_segflg = UIO_SYSSPACE;
+	uio.uio_rw = UIO_READ;
+	uio.uio_procp = p;
+
+	error = VOP_READ(nid.ni_vp, &uio, 0, NOCRED);
+
+	if (error == 0) {
+		*bufp = ptr;
+		*buflen = va.va_size;
+	} else
+		free(bufp, M_DEVBUF);
+
+fail:
+	vput(nid.ni_vp);
+	return (error);
+}