env: common: accept flags on reset to default env

The function set_default_env() sets the hashtable flags for import_r().
Formally set_default_env() doesn't accept flags from its callers. In
practice the caller can (un)set the H_INTERACTIVE flag, but it has to be
done using the first character of the function's string argument. Other
flags like H_FORCE can't be set by the caller.

Change the function to accept flags argument. The benefits are:
1. The caller will have to explicitly set the H_INTERACTIVE flag,
   instead of un-setting it using a special char in a string.
2. Add the ability to propagate flags from the caller to himport(),
   especially the H_FORCE flag from do_env_default() in nvedit.c that
   currently gets ignored for "env default -a -f" commands.
3. Flags and messages will not be coupled together. A caller will be
   able to set flags without passing a string and vice versa.

Please note:
The propagation of H_FORCE from do_env_default() does not introduce any
functional changes, because currently himport_r() is set to destroy the
old environment regardless if H_FORCE flag is set or not. More changes
are needed to utilize the propagation of H_FORCE.

Signed-off-by: Yaniv Levinsky <yaniv.levinsky@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>

arch/arm/mach-imx/mx6/opos6ul.c

@@ -127,7 +127,7 @@ int board_late_init(void)
 
 	/* In bootstrap don't use the env vars */
 	if (((reg & 0x3000000) >> 24) == 0x1) {
-		set_default_env(NULL);
+		set_default_env(NULL, 0);
 		env_set("preboot", "");
 	}
 

cmd/nvedit.c

@@ -802,7 +802,8 @@ static int do_env_default(cmd_tbl_t *cmdtp, int flag,
 	debug("Final value for argc=%d\n", argc);
 	if (all && (argc == 0)) {
 		/* Reset the whole environment */
-		set_default_env("## Resetting to default environment\n");
+		set_default_env("## Resetting to default environment\n",
+				env_flag);
 		return 0;
 	}
 	if (!all && (argc > 0)) {

common/board_r.c

@@ -454,7 +454,7 @@ static int initr_env(void)
 	if (should_load_env())
 		env_relocate();
 	else
-		set_default_env(NULL);
+		set_default_env(NULL, 0);
 #ifdef CONFIG_OF_CONTROL
 	env_set_addr("fdtcontroladdr", gd->fdt_blob);
 #endif

common/spl/spl_dfu.c

@@ -38,7 +38,7 @@ int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr)
 	int ret;
 
 	/* set default environment */
-	set_default_env(0);
+	set_default_env(NULL, 0);
 	str_env = env_get(dfu_alt_info);
 	if (!str_env) {
 		pr_err("\"dfu_alt_info\" env variable not defined!\n");

env/common.c

@@ -58,22 +58,18 @@ char *env_get_default(const char *name)
 	return ret_val;
 }
 
-void set_default_env(const char *s)
+void set_default_env(const char *s, int flags)
 {
-	int flags = 0;
-
 	if (sizeof(default_environment) > ENV_SIZE) {
 		puts("*** Error - default environment is too large\n\n");
 		return;
 	}
 
 	if (s) {
-		if (*s == '!') {
+		if ((flags & H_INTERACTIVE) == 0) {
 			printf("*** Warning - %s, "
-				"using default environment\n\n",
-				s + 1);
+				"using default environment\n\n", s);
 		} else {
-			flags = H_INTERACTIVE;
 			puts(s);
 		}
 	} else {
@@ -117,7 +113,7 @@ int env_import(const char *buf, int check)
 		memcpy(&crc, &ep->crc, sizeof(crc));
 
 		if (crc32(0, ep->data, ENV_SIZE) != crc) {
-			set_default_env("!bad CRC");
+			set_default_env("bad CRC", 0);
 			return -EIO;
 		}
 	}
@@ -130,7 +126,7 @@ int env_import(const char *buf, int check)
 
 	pr_err("Cannot import environment: errno = %d\n", errno);
 
-	set_default_env("!import failed");
+	set_default_env("import failed", 0);
 
 	return -EIO;
 }
@@ -155,7 +151,7 @@ int env_import_redund(const char *buf1, int buf1_read_fail,
 	}
 
 	if (buf1_read_fail && buf2_read_fail) {
-		set_default_env("!bad env area");
+		set_default_env("bad env area", 0);
 		return -EIO;
 	} else if (!buf1_read_fail && buf2_read_fail) {
 		gd->env_valid = ENV_VALID;
@@ -171,7 +167,7 @@ int env_import_redund(const char *buf1, int buf1_read_fail,
 			tmp_env2->crc;
 
 	if (!crc1_ok && !crc2_ok) {
-		set_default_env("!bad CRC");
+		set_default_env("bad CRC", 0);
 		return -EIO;
 	} else if (crc1_ok && !crc2_ok) {
 		gd->env_valid = ENV_VALID;
@@ -233,10 +229,10 @@ void env_relocate(void)
 	if (gd->env_valid == ENV_INVALID) {
 #if defined(CONFIG_ENV_IS_NOWHERE) || defined(CONFIG_SPL_BUILD)
 		/* Environment not changable */
-		set_default_env(NULL);
+		set_default_env(NULL, 0);
 #else
 		bootstage_error(BOOTSTAGE_ID_NET_CHECKSUM);
-		set_default_env("!bad CRC");
+		set_default_env("bad CRC", 0);
 #endif
 	} else {
 		env_load();

env/ext4.c

@@ -119,7 +119,7 @@ static int env_ext4_load(void)
 	return env_import(buf, 1);
 
 err_env_relocate:
-	set_default_env(NULL);
+	set_default_env(NULL, 0);
 
 	return -EIO;
 }

env/fat.c

@@ -122,7 +122,7 @@ static int env_fat_load(void)
 	return env_import(buf, 1);
 
 err_env_relocate:
-	set_default_env(NULL);
+	set_default_env(NULL, 0);
 
 	return -EIO;
 }

env/mmc.c

@@ -155,19 +155,19 @@ static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
 static const char *init_mmc_for_env(struct mmc *mmc)
 {
 	if (!mmc)
-		return "!No MMC card found";
+		return "No MMC card found";
 
 #if CONFIG_IS_ENABLED(BLK)
 	struct udevice *dev;
 
 	if (blk_get_from_parent(mmc->dev, &dev))
-		return "!No block device";
+		return "No block device";
 #else
 	if (mmc_init(mmc))
-		return "!MMC init failed";
+		return "MMC init failed";
 #endif
 	if (mmc_set_env_part(mmc))
-		return "!MMC partition switch failed";
+		return "MMC partition switch failed";
 
 	return NULL;
 }
@@ -298,7 +298,7 @@ fini:
 	fini_mmc_for_env(mmc);
 err:
 	if (ret)
-		set_default_env(errmsg);
+		set_default_env(errmsg, 0);
 
 #endif
 	return ret;
@@ -339,7 +339,7 @@ fini:
 	fini_mmc_for_env(mmc);
 err:
 	if (ret)
-		set_default_env(errmsg);
+		set_default_env(errmsg, 0);
 #endif
 	return ret;
 }

env/nand.c

@@ -327,7 +327,7 @@ static int env_nand_load(void)
 	tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
 	if (tmp_env1 == NULL || tmp_env2 == NULL) {
 		puts("Can't allocate buffers for environment\n");
-		set_default_env("!malloc() failed");
+		set_default_env("malloc() failed", 0);
 		ret = -EIO;
 		goto done;
 	}
@@ -366,14 +366,14 @@ static int env_nand_load(void)
 	if (mtd && !get_nand_env_oob(mtd, &nand_env_oob_offset)) {
 		printf("Found Environment offset in OOB..\n");
 	} else {
-		set_default_env("!no env offset in OOB");
+		set_default_env("no env offset in OOB", 0);
 		return;
 	}
 #endif
 
 	ret = readenv(CONFIG_ENV_OFFSET, (u_char *)buf);
 	if (ret) {
-		set_default_env("!readenv() failed");
+		set_default_env("readenv() failed", 0);
 		return -EIO;
 	}
 

env/sata.c

@@ -106,7 +106,7 @@ static void env_sata_load(void)
 	}
 
 	if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) {
-		set_default_env(NULL);
+		set_default_env(NULL, 0);
 		return -EIO;
 	}
 

env/sf.c

@@ -60,7 +60,7 @@ static int setup_flash_device(void)
 	ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
 				     0, 0, &new);
 	if (ret) {
-		set_default_env("!spi_flash_probe_bus_cs() failed");
+		set_default_env("spi_flash_probe_bus_cs() failed", 0);
 		return ret;
 	}
 
@@ -72,7 +72,7 @@ static int setup_flash_device(void)
 			CONFIG_ENV_SPI_CS,
 			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
 		if (!env_flash) {
-			set_default_env("!spi_flash_probe() failed");
+			set_default_env("spi_flash_probe() failed", 0);
 			return -EIO;
 		}
 	}
@@ -173,7 +173,7 @@ static int env_sf_load(void)
 	tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
 			CONFIG_ENV_SIZE);
 	if (!tmp_env1 || !tmp_env2) {
-		set_default_env("!malloc() failed");
+		set_default_env("malloc() failed", 0);
 		ret = -EIO;
 		goto out;
 	}
@@ -268,7 +268,7 @@ static int env_sf_load(void)
 
 	buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
 	if (!buf) {
-		set_default_env("!malloc() failed");
+		set_default_env("malloc() failed", 0);
 		return -EIO;
 	}
 
@@ -279,7 +279,7 @@ static int env_sf_load(void)
 	ret = spi_flash_read(env_flash,
 		CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
 	if (ret) {
-		set_default_env("!spi_flash_read() failed");
+		set_default_env("spi_flash_read() failed", 0);
 		goto err_read;
 	}
 

env/ubi.c

@@ -114,7 +114,7 @@ static int env_ubi_load(void)
 	if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
 		printf("\n** Cannot find mtd partition \"%s\"\n",
 		       CONFIG_ENV_UBI_PART);
-		set_default_env(NULL);
+		set_default_env(NULL, 0);
 		return -EIO;
 	}
 
@@ -151,14 +151,14 @@ static int env_ubi_load(void)
 	if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
 		printf("\n** Cannot find mtd partition \"%s\"\n",
 		       CONFIG_ENV_UBI_PART);
-		set_default_env(NULL);
+		set_default_env(NULL, 0);
 		return -EIO;
 	}
 
 	if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, buf, CONFIG_ENV_SIZE)) {
 		printf("\n** Unable to read env from %s:%s **\n",
 		       CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
-		set_default_env(NULL);
+		set_default_env(NULL, 0);
 		return -EIO;
 	}
 

include/environment.h

@@ -272,7 +272,7 @@ void env_crc_update(void);
 char *env_get_default(const char *name);
 
 /* [re]set to the default environment */
-void set_default_env(const char *s);
+void set_default_env(const char *s, int flags);
 
 /* [re]set individual variables to their value in the default environment */
 int set_default_vars(int nvars, char * const vars[], int flags);