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env: split env_import_redund() into 2 functions
split from env_import_redund() the part which checks which Environment is valid into a separate function called env_check_redund() and call it from env_import_redund(). So env_check_redund() can be used from places which also need to do this checks. Signed-off-by: Heiko Schocher <hs@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
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parent
8d7f3fcb4a
commit
1229533a2a
2 changed files with 50 additions and 10 deletions
42
env/common.c
vendored
42
env/common.c
vendored
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@ -141,12 +141,11 @@ int env_import(const char *buf, int check, int flags)
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#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
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static unsigned char env_flags;
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int env_import_redund(const char *buf1, int buf1_read_fail,
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const char *buf2, int buf2_read_fail,
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int flags)
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int env_check_redund(const char *buf1, int buf1_read_fail,
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const char *buf2, int buf2_read_fail)
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{
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int crc1_ok, crc2_ok;
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env_t *ep, *tmp_env1, *tmp_env2;
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env_t *tmp_env1, *tmp_env2;
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tmp_env1 = (env_t *)buf1;
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tmp_env2 = (env_t *)buf2;
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@ -159,14 +158,13 @@ int env_import_redund(const char *buf1, int buf1_read_fail,
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}
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if (buf1_read_fail && buf2_read_fail) {
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env_set_default("bad env area", 0);
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return -EIO;
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} else if (!buf1_read_fail && buf2_read_fail) {
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gd->env_valid = ENV_VALID;
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return env_import((char *)tmp_env1, 1, flags);
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return -EINVAL;
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} else if (buf1_read_fail && !buf2_read_fail) {
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gd->env_valid = ENV_REDUND;
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return env_import((char *)tmp_env2, 1, flags);
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return -ENOENT;
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}
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crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) ==
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@ -175,7 +173,6 @@ int env_import_redund(const char *buf1, int buf1_read_fail,
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tmp_env2->crc;
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if (!crc1_ok && !crc2_ok) {
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env_set_default("bad CRC", 0);
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return -ENOMSG; /* needed for env_load() */
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} else if (crc1_ok && !crc2_ok) {
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gd->env_valid = ENV_VALID;
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@ -195,12 +192,37 @@ int env_import_redund(const char *buf1, int buf1_read_fail,
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gd->env_valid = ENV_VALID;
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}
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return 0;
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}
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int env_import_redund(const char *buf1, int buf1_read_fail,
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const char *buf2, int buf2_read_fail,
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int flags)
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{
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env_t *ep;
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int ret;
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ret = env_check_redund(buf1, buf1_read_fail, buf2, buf2_read_fail);
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if (ret == -EIO) {
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env_set_default("bad env area", 0);
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return -EIO;
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} else if (ret == -EINVAL) {
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return env_import((char *)buf1, 1, flags);
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} else if (ret == -ENOENT) {
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return env_import((char *)buf2, 1, flags);
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} else if (ret == -ENOMSG) {
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env_set_default("bad CRC", 0);
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return -ENOMSG;
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}
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if (gd->env_valid == ENV_VALID)
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ep = tmp_env1;
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ep = (env_t *)buf1;
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else
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ep = tmp_env2;
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ep = (env_t *)buf2;
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env_flags = ep->flags;
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return env_import((char *)ep, 0, flags);
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}
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#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
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@ -318,6 +318,24 @@ int env_import(const char *buf, int check, int flags);
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*/
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int env_export(struct environment_s *env_out);
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/**
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* env_check_redund() - check the two redundant environments
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* and find out, which is the valid one.
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*
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* @buf1: First environment (struct environemnt_s *)
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* @buf1_read_fail: 0 if buf1 is valid, non-zero if invalid
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* @buf2: Second environment (struct environemnt_s *)
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* @buf2_read_fail: 0 if buf2 is valid, non-zero if invalid
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* @return 0 if OK,
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* -EIO if no environment is valid,
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* -EINVAL if read of second entry is good
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* -ENOENT if read of first entry is good
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* -ENOMSG if the CRC was bad
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*/
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int env_check_redund(const char *buf1, int buf1_read_fail,
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const char *buf2, int buf2_read_fail);
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/**
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* env_import_redund() - Select and import one of two redundant environments
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*
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