zfs: fix missing include for disk_partition definition

[oweals/u-boot.git] / include / env.h

diff --git a/include/env.h b/include/env.h
index 7204a4bc5503499b1d5d7e5cd9602bac39299508..d6c2d751d62b6cc7eb3bbf9a108b36be14a8a486 100644 (file)
--- a/include/env.h
+++ b/include/env.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
- * Common environment functions
+ * Common environment functions and definitions
  *
  * (C) Copyright 2000-2009
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -9,11 +9,59 @@
 #ifndef __ENV_H
 #define __ENV_H
 
+#include <compiler.h>
 #include <stdbool.h>
 #include <linux/types.h>
 
 struct environment_s;
 
+/* Value for environment validity */
+enum env_valid {
+       ENV_INVALID,    /* No valid environment */
+       ENV_VALID,      /* First or only environment is valid */
+       ENV_REDUND,     /* Redundant environment is valid */
+};
+
+/** enum env_op - environment callback operation */
+enum env_op {
+       env_op_create,
+       env_op_delete,
+       env_op_overwrite,
+};
+
+/** struct env_clbk_tbl - declares a new callback */
+struct env_clbk_tbl {
+       const char *name;               /* Callback name */
+       int (*callback)(const char *name, const char *value, enum env_op op,
+                       int flags);
+};
+
+/*
+ * Define a callback that can be associated with variables.
+ * when associated through the ".callbacks" environment variable, the callback
+ * will be executed any time the variable is inserted, overwritten, or deleted.
+ *
+ * For SPL these are silently dropped to reduce code size, since environment
+ * callbacks are not supported with SPL.
+ */
+#ifdef CONFIG_SPL_BUILD
+#define U_BOOT_ENV_CALLBACK(name, callback) \
+       static inline __maybe_unused void _u_boot_env_noop_##name(void) \
+       { \
+               (void)callback; \
+       }
+#else
+#define U_BOOT_ENV_CALLBACK(name, callback) \
+       ll_entry_declare(struct env_clbk_tbl, name, env_clbk) = \
+       {#name, callback}
+#endif
+
+/** enum env_redund_flags - Flags for the redundand_environment */
+enum env_redund_flags {
+       ENV_REDUND_OBSOLETE = 0,
+       ENV_REDUND_ACTIVE = 1,
+};
+
 /**
  * env_get_id() - Gets a sequence number for the environment
  *
@@ -65,6 +113,16 @@ int env_match(unsigned char *name, int index);
  */
 char *env_get(const char *varname);
 
+/*
+ * Like env_get, but prints an error if envvar isn't defined in the
+ * environment.  It always returns what env_get does, so it can be used in
+ * place of env_get without changing error handling otherwise.
+ *
+ * @varname:   Variable to look up
+ * @return value of variable, or NULL if not found
+ */
+char *from_env(const char *envvar);
+
 /**
  * env_get_f() - Look up the value of an environment variable (early)
  *
@@ -268,4 +326,21 @@ char *env_get_default(const char *name);
 /* [re]set to the default environment */
 void env_set_default(const char *s, int flags);
 
+/**
+ * env_get_char() - Get a character from the early environment
+ *
+ * This reads from the pre-relocation environment
+ *
+ * @index: Index of character to read (0 = first)
+ * @return character read, or -ve on error
+ */
+int env_get_char(int index);
+
+/**
+ * env_reloc() - Relocate the 'env' sub-commands
+ *
+ * This is used for those unfortunate archs with crappy toolchains
+ */
+void env_reloc(void);
+
 #endif