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Date:      Tue, 03 Sep 2019 14:07:41 -0000
From:      Warner Losh <imp@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r346575 - in head/stand/efi: include libefi loader
Message-ID:  <201904221840.x3MIePbI074677@repo.freebsd.org>
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Author: imp
Date: Mon Apr 22 18:40:24 2019
New Revision: 346575
URL: https://svnweb.freebsd.org/changeset/base/346575

Log:
  Create boot_img as a global variable
  
  Get the information from the image that we're booting and store it in
  a global variable. Prefer using this to passing it around. Remove the
  special case for zfs that set the preferred boot handle by having it
  uses this global variable diretly.
  
  Reviewed by: kevans@
  Differential Revision: https://reviews.freebsd.org/D20015

Modified:
  head/stand/efi/include/efi.h
  head/stand/efi/include/efizfs.h
  head/stand/efi/libefi/efizfs.c
  head/stand/efi/loader/main.c

Modified: head/stand/efi/include/efi.h
==============================================================================
--- head/stand/efi/include/efi.h	Mon Apr 22 18:38:54 2019	(r346574)
+++ head/stand/efi/include/efi.h	Mon Apr 22 18:40:24 2019	(r346575)
@@ -62,6 +62,11 @@ Revision History
 #include "efiuga.h"
 
 /*
+ * Global variables
+ */
+extern EFI_LOADED_IMAGE *boot_img;
+
+/*
  * FreeBSD UUID
  */
 #define FREEBSD_BOOT_VAR_GUID \

Modified: head/stand/efi/include/efizfs.h
==============================================================================
--- head/stand/efi/include/efizfs.h	Mon Apr 22 18:38:54 2019	(r346574)
+++ head/stand/efi/include/efizfs.h	Mon Apr 22 18:40:24 2019	(r346575)
@@ -50,10 +50,8 @@ void efi_zfs_probe(void);
 EFI_HANDLE efizfs_get_handle_by_guid(uint64_t);
 bool efizfs_get_guid_by_handle(EFI_HANDLE, uint64_t *);
 zfsinfo_list_t *efizfs_get_zfsinfo_list(void);
-void efizfs_set_preferred(EFI_HANDLE);
 
 #else
-#define efizfs_set_preferred(x)
 #define efi_zfs_probe NULL
 #endif
 

Modified: head/stand/efi/libefi/efizfs.c
==============================================================================
--- head/stand/efi/libefi/efizfs.c	Mon Apr 22 18:38:54 2019	(r346574)
+++ head/stand/efi/libefi/efizfs.c	Mon Apr 22 18:40:24 2019	(r346575)
@@ -45,14 +45,6 @@ static zfsinfo_list_t zfsinfo;
 
 uint64_t pool_guid;
 
-static EFI_HANDLE preferred;
-
-void
-efizfs_set_preferred(EFI_HANDLE h)
-{
-	preferred = h;
-}
-
 zfsinfo_list_t *
 efizfs_get_zfsinfo_list(void)
 {
@@ -122,7 +114,7 @@ efi_zfs_probe(void)
 			    efipart_hddev.dv_name, hd->pd_unit, pd->pd_unit);
 			if (zfs_probe_dev(devname, &guid) == 0) {
 				insert_zfs(pd->pd_handle, guid);
-				if (pd->pd_handle == preferred)
+				if (pd->pd_handle == boot_img->DeviceHandle)
 					pool_guid = guid;
 			}
 

Modified: head/stand/efi/loader/main.c
==============================================================================
--- head/stand/efi/loader/main.c	Mon Apr 22 18:38:54 2019	(r346574)
+++ head/stand/efi/loader/main.c	Mon Apr 22 18:40:24 2019	(r346575)
@@ -88,6 +88,11 @@ static int fail_timeout = 5;
  */
 UINT16 boot_current;
 
+/*
+ * Image that we booted from.
+ */
+EFI_LOADED_IMAGE *boot_img;
+
 static bool
 has_keyboard(void)
 {
@@ -300,7 +305,7 @@ fix_dosisms(char *p)
 
 enum { BOOT_INFO_OK = 0, BAD_CHOICE = 1, NOT_SPECIFIC = 2  };
 static int
-match_boot_info(EFI_LOADED_IMAGE *img __unused, char *boot_info, size_t bisz)
+match_boot_info(char *boot_info, size_t bisz)
 {
 	uint32_t attr;
 	uint16_t fplen;
@@ -448,7 +453,7 @@ match_boot_info(EFI_LOADED_IMAGE *img __unused, char *
  * a drop to the OK boot loader prompt is possible.
  */
 static int
-find_currdev(EFI_LOADED_IMAGE *img, bool do_bootmgr, bool is_last,
+find_currdev(bool do_bootmgr, bool is_last,
     char *boot_info, size_t boot_info_sz)
 {
 	pdinfo_t *dp, *pp;
@@ -481,7 +486,7 @@ find_currdev(EFI_LOADED_IMAGE *img, bool do_bootmgr, b
 	 * loader.conf.
 	 */
 	if (do_bootmgr) {
-		rv = match_boot_info(img, boot_info, boot_info_sz);
+		rv = match_boot_info(boot_info, boot_info_sz);
 		switch (rv) {
 		case BOOT_INFO_OK:	/* We found it */
 			return (0);
@@ -514,7 +519,7 @@ find_currdev(EFI_LOADED_IMAGE *img, bool do_bootmgr, b
 	 * boot protocol to do so. We fail and let UEFI go on to
 	 * the next candidate.
 	 */
-	dp = efiblk_get_pdinfo_by_handle(img->DeviceHandle);
+	dp = efiblk_get_pdinfo_by_handle(boot_img->DeviceHandle);
 	if (dp != NULL) {
 		text = efi_devpath_name(dp->pd_devpath);
 		if (text != NULL) {
@@ -553,7 +558,7 @@ find_currdev(EFI_LOADED_IMAGE *img, bool do_bootmgr, b
 	 * any of the nodes in that path match one of the enumerated
 	 * handles. Currently, this handle list is only for netboot.
 	 */
-	if (efi_handle_lookup(img->DeviceHandle, &dev, &unit, &extra) == 0) {
+	if (efi_handle_lookup(boot_img->DeviceHandle, &dev, &unit, &extra) == 0) {
 		set_currdev_devsw(dev, unit);
 		if (sanity_check_currdev())
 			return (0);
@@ -751,7 +756,6 @@ main(int argc, CHAR16 *argv[])
 	size_t sz, bosz = 0, bisz = 0;
 	UINT16 boot_order[100];
 	char boot_info[4096];
-	EFI_LOADED_IMAGE *img;
 	char buf[32];
 	bool uefi_boot_mgr;
 
@@ -763,7 +767,7 @@ main(int argc, CHAR16 *argv[])
 	archsw.arch_zfs_probe = efi_zfs_probe;
 
         /* Get our loaded image protocol interface structure. */
-	BS->HandleProtocol(IH, &imgid, (VOID**)&img);
+	BS->HandleProtocol(IH, &imgid, (VOID**)&boot_img);
 
 	/*
 	 * Chicken-and-egg problem; we want to have console output early, but
@@ -776,9 +780,6 @@ main(int argc, CHAR16 *argv[])
 	setenv("console", "efi", 1);
 	cons_probe();
 
-	/* Tell ZFS probe code where we booted from, if zfs configured */
-	efizfs_set_preferred(img->DeviceHandle);
-
 	/* Init the time source */
 	efi_time_init();
 
@@ -880,14 +881,14 @@ main(int argc, CHAR16 *argv[])
 
 
 	/* Determine the devpath of our image so we can prefer it. */
-	text = efi_devpath_name(img->FilePath);
+	text = efi_devpath_name(boot_img->FilePath);
 	if (text != NULL) {
 		printf("   Load Path: %S\n", text);
 		efi_setenv_freebsd_wcs("LoaderPath", text);
 		efi_free_devpath_name(text);
 	}
 
-	rv = BS->HandleProtocol(img->DeviceHandle, &devid, (void **)&imgpath);
+	rv = BS->HandleProtocol(boot_img->DeviceHandle, &devid, (void **)&imgpath);
 	if (rv == EFI_SUCCESS) {
 		text = efi_devpath_name(imgpath);
 		if (text != NULL) {
@@ -974,7 +975,7 @@ main(int argc, CHAR16 *argv[])
 	 * the boot protocol and also allow an escape hatch for users wishing
 	 * to try something different.
 	 */
-	if (find_currdev(img, uefi_boot_mgr, is_last, boot_info, bisz) != 0)
+	if (find_currdev(uefi_boot_mgr, is_last, boot_info, bisz) != 0)
 		if (!interactive_interrupt("Failed to find bootable partition"))
 			return (EFI_NOT_FOUND);

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