[U-Boot] [PATCH 5/5] env: Add redundant env support to UBI env
Joe Hershberger
joe.hershberger at ni.com
Fri Feb 8 21:07:26 CET 2013
Allow the user to specify two UBI volumes to use for the environment
Signed-off-by: Joe Hershberger <joe.hershberger at ni.com>
---
README | 6 +++
common/env_ubi.c | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++
include/environment.h | 3 ++
tools/env/fw_env.c | 3 ++
4 files changed, 127 insertions(+)
diff --git a/README b/README
index c46ca3a..baf828a 100644
--- a/README
+++ b/README
@@ -3457,6 +3457,12 @@ but it can not erase, write this NOR flash by SRIO or PCIE interface.
Define this to the name of the volume that you want to store the
environment in.
+ - CONFIG_ENV_UBI_VOLUME_REDUND:
+
+ Define this to the name of another volume to store a second copy of
+ the environment in. This will enable redundant environments in UBI.
+ It is assumed that both volumes are in the same MTD partition.
+
- CONFIG_SYS_SPI_INIT_OFFSET
Defines offset to the initial SPI buffer area in DPRAM. The
diff --git a/common/env_ubi.c b/common/env_ubi.c
index 9a47fd2..48f0bcb 100644
--- a/common/env_ubi.c
+++ b/common/env_ubi.c
@@ -47,6 +47,58 @@ int env_init(void)
}
#ifdef CONFIG_CMD_SAVEENV
+#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
+static unsigned char env_flags;
+
+int saveenv(void)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
+ ssize_t len;
+ char *res;
+
+ res = (char *)&env_new->data;
+ len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
+ if (len < 0) {
+ error("Cannot export environment: errno = %d\n", errno);
+ return 1;
+ }
+
+ if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
+ printf("\n** Cannot find mtd partition \"%s\"\n",
+ CONFIG_ENV_UBI_PART);
+ return 1;
+ }
+
+ env_new->crc = crc32(0, env_new->data, ENV_SIZE);
+ env_new->flags = ++env_flags; /* increase the serial */
+
+ if (gd->env_valid == 1) {
+ puts("Writing to redundant UBI... ");
+ if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME_REDUND,
+ (void *)env_new, CONFIG_ENV_SIZE)) {
+ printf("\n** Unable to write env to %s:%s **\n",
+ CONFIG_ENV_UBI_PART,
+ CONFIG_ENV_UBI_VOLUME_REDUND);
+ return 1;
+ }
+ } else {
+ puts("Writing to UBI... ");
+ if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME,
+ (void *)env_new, CONFIG_ENV_SIZE)) {
+ printf("\n** Unable to write env to %s:%s **\n",
+ CONFIG_ENV_UBI_PART,
+ CONFIG_ENV_UBI_VOLUME);
+ return 1;
+ }
+ }
+
+ puts("done\n");
+
+ gd->env_valid = gd->env_valid == 2 ? 1 : 2;
+
+ return 0;
+}
+#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
int saveenv(void)
{
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
@@ -78,8 +130,70 @@ int saveenv(void)
puts("done\n");
return 0;
}
+#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
#endif /* CONFIG_CMD_SAVEENV */
+#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
+void env_relocate_spec(void)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf, CONFIG_ENV_SIZE);
+ ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf, CONFIG_ENV_SIZE);
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *ep, *tmp_env1, *tmp_env2;
+
+ tmp_env1 = (env_t *)env1_buf;
+ tmp_env2 = (env_t *)env2_buf;
+
+ if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
+ printf("\n** Cannot find mtd partition \"%s\"\n",
+ CONFIG_ENV_UBI_PART);
+ set_default_env(NULL);
+ return;
+ }
+
+ if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1,
+ CONFIG_ENV_SIZE))
+ printf("\n** Unable to read env from %s:%s **\n",
+ CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
+
+ if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND, (void *)tmp_env2,
+ CONFIG_ENV_SIZE))
+ printf("\n** Unable to read redundant env from %s:%s **\n",
+ CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND);
+
+ crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc;
+ crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc;
+
+ if (!crc1_ok && !crc2_ok) {
+ set_default_env("!bad CRC");
+ return;
+ } else if (crc1_ok && !crc2_ok) {
+ gd->env_valid = 1;
+ } else if (!crc1_ok && crc2_ok) {
+ gd->env_valid = 2;
+ } else {
+ /* both ok - check serial */
+ if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if (tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if (tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+ }
+
+ if (gd->env_valid == 1)
+ ep = tmp_env1;
+ else
+ ep = tmp_env2;
+
+ env_flags = ep->flags;
+ env_import((char *)ep, 0);
+}
+#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
void env_relocate_spec(void)
{
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
@@ -101,3 +215,4 @@ void env_relocate_spec(void)
env_import(buf, 1);
}
+#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
diff --git a/include/environment.h b/include/environment.h
index ece073f..4c6a37b 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -103,6 +103,9 @@ extern unsigned long nand_env_oob_offset;
# ifndef CONFIG_ENV_UBI_VOLUME
# error "Need to define CONFIG_ENV_UBI_VOLUME when using CONFIG_ENV_IS_IN_UBI"
# endif
+# if defined(CONFIG_ENV_UBI_VOLUME_REDUND)
+# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
+# endif
# ifndef CONFIG_ENV_SIZE
# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_UBI"
# endif
diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c
index 88e184f..7654b1e 100644
--- a/tools/env/fw_env.c
+++ b/tools/env/fw_env.c
@@ -1135,6 +1135,9 @@ int fw_env_open(void)
} else if (DEVTYPE(dev_current) == MTD_DATAFLASH &&
DEVTYPE(!dev_current) == MTD_DATAFLASH) {
environment.flag_scheme = FLAG_BOOLEAN;
+ } else if (DEVTYPE(dev_current) == MTD_UBIVOLUME &&
+ DEVTYPE(!dev_current) == MTD_UBIVOLUME) {
+ environment.flag_scheme = FLAG_INCREMENTAL;
} else {
fprintf (stderr, "Incompatible flash types!\n");
return -1;
--
1.7.11.5
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