svn commit: r236581 - head/sys/boot/sparc64/loader

[Marius Strobl]

Author: marius
Date: Mon Jun  4 20:56:40 2012
New Revision: 236581
URL: http://svn.freebsd.org/changeset/base/236581

Log:
  The loaddev environment variable is not modifiable once set, so it is not
  update for ZFS. It seems that this does not really affect anything except
  the help command. Nevertheless, rearrange things so loaddev is set only
  once in all cases in order to get it right.
  Pointed out by: avg
  
  MFC after:	r235364

Modified:
  head/sys/boot/sparc64/loader/main.c

Modified: head/sys/boot/sparc64/loader/main.c
==============================================================================
--- head/sys/boot/sparc64/loader/main.c	Mon Jun  4 20:50:41 2012	(r236580)
+++ head/sys/boot/sparc64/loader/main.c	Mon Jun  4 20:56:40 2012	(r236581)
@@ -141,6 +141,7 @@ static u_int tlb_locked;
 static vm_offset_t curkva = 0;
 static vm_offset_t heapva;
 
+static char bootpath[64];
 static phandle_t root;
 
 /*
@@ -740,7 +741,7 @@ sparc64_zfs_probe(void)
 
 	/* Get the GUID of the ZFS pool on the boot device. */
 	guid = 0;
-	zfs_probe_dev(getenv("currdev"), &guid);
+	zfs_probe_dev(bootpath, &guid);
 
 	for (unit = 0; unit < MAXDEV; unit++) {
 		/* Find freebsd-zfs slices in the VTOC. */
@@ -757,7 +758,7 @@ sparc64_zfs_probe(void)
 
 		for (part = 0; part < 8; part++) {
 			if (part == 2 || vtoc.part[part].tag !=
-			     VTOC_TAG_FREEBSD_ZFS)
+			    VTOC_TAG_FREEBSD_ZFS)
 				continue;
 			sprintf(devname, "disk%d:%c", unit, part + 'a');
 			if (zfs_probe_dev(devname, NULL) == ENXIO)
@@ -770,11 +771,9 @@ sparc64_zfs_probe(void)
 		zfs_currdev.root_guid = 0;
 		zfs_currdev.d_dev = &zfs_dev;
 		zfs_currdev.d_type = zfs_currdev.d_dev->dv_type;
-		/* Update the environment for ZFS. */
-		env_setenv("currdev", EV_VOLATILE, zfs_fmtdev(&zfs_currdev),
-		    ofw_setcurrdev, env_nounset);
-		env_setenv("loaddev", EV_VOLATILE, zfs_fmtdev(&zfs_currdev),
-		    env_noset, env_nounset);
+		(void)strncpy(bootpath, zfs_fmtdev(&zfs_currdev),
+		    sizeof(bootpath) - 1);
+		bootpath[sizeof(bootpath) - 1] = '\0';
 	}
 }
 #endif /* LOADER_ZFS_SUPPORT */
@@ -782,7 +781,6 @@ sparc64_zfs_probe(void)
 int
 main(int (*openfirm)(void *))
 {
-	char bootpath[64];
 	char compatible[32];
 	struct devsw **dp;
 
@@ -834,16 +832,11 @@ main(int (*openfirm)(void *))
 	 */
 	if (bootpath[strlen(bootpath) - 2] == ':' &&
 	    bootpath[strlen(bootpath) - 1] == 'f' &&
-	    strstr(bootpath, "cdrom")) {
+	    strstr(bootpath, "cdrom") != NULL) {
 		bootpath[strlen(bootpath) - 1] = 'a';
 		printf("Boot path set to %s\n", bootpath);
 	}
 
-	env_setenv("currdev", EV_VOLATILE, bootpath,
-	    ofw_setcurrdev, env_nounset);
-	env_setenv("loaddev", EV_VOLATILE, bootpath,
-	    env_noset, env_nounset);
-
 	/*
 	 * Initialize devices.
 	 */
@@ -851,6 +844,15 @@ main(int (*openfirm)(void *))
 		if ((*dp)->dv_init != 0)
 			(*dp)->dv_init();
 
+	/*
+	 * Now that sparc64_zfs_probe() might have altered bootpath,
+	 * export it.
+	 */
+	env_setenv("currdev", EV_VOLATILE, bootpath,
+	    ofw_setcurrdev, env_nounset);
+	env_setenv("loaddev", EV_VOLATILE, bootpath,
+	    env_noset, env_nounset);
+
 	printf("\n");
 	printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
 	printf("(%s, %s)\n", bootprog_maker, bootprog_date);