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tracing: Update synth command errors

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Since array types are handled differently, errors referencing them
also need to be handled differently.  Add and use a new
INVALID_ARRAY_SPEC error.  Also add INVALID_CMD and INVALID_DYN_CMD to
catch and display the correct form for badly-formed commands, which
can also be used in place of CMD_INCOMPLETE, which is removed, and
remove CMD_TOO_LONG, since it's no longer used.

Link: https://lkml.kernel.org/r/b9dd434dc6458dcff11adc6ed616fe93a8794770.1612208610.git.zanussi@kernel.org

Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Tom Zanussi 2021-02-01 13:48:13 -06:00 committed by Steven Rostedt (VMware)
parent c9e759b1e8
commit 8d3e816523
1 changed files with 19 additions and 11 deletions
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30
kernel/trace/trace_events_synth.c
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@ -23,13 +23,14 @@
#undef ERRORS
#define ERRORS \
C(BAD_NAME, "Illegal name"), \
C(CMD_INCOMPLETE, "Incomplete command"), \
C(INVALID_CMD, "Command must be of the form: <name> field[;field] ..."),\
C(INVALID_DYN_CMD, "Command must be of the form: s or -:[synthetic/]<name> field[;field] ..."),\
C(EVENT_EXISTS, "Event already exists"), \
C(TOO_MANY_FIELDS, "Too many fields"), \
C(INCOMPLETE_TYPE, "Incomplete type"), \
C(INVALID_TYPE, "Invalid type"), \
C(INVALID_FIELD, "Invalid field"), \
C(CMD_TOO_LONG, "Command too long"),
C(INVALID_FIELD, "Invalid field"), \
C(INVALID_ARRAY_SPEC, "Invalid array specification"),
#undef C
#define C(a, b) SYNTH_ERR_##a
@ -655,7 +656,10 @@ static struct synth_field *parse_synth_field(int argc, char **argv)
size = synth_field_size(field->type);
if (size < 0) {
synth_err(SYNTH_ERR_INVALID_TYPE, errpos(field_type));
if (array)
synth_err(SYNTH_ERR_INVALID_ARRAY_SPEC, errpos(field_name));
else
synth_err(SYNTH_ERR_INVALID_TYPE, errpos(field_type));
ret = -EINVAL;
goto free;
} else if (size == 0) {
@ -1174,7 +1178,7 @@ static int __create_synth_event(const char *name, const char *raw_fields)
*/
if (name[0] == '\0') {
synth_err(SYNTH_ERR_CMD_INCOMPLETE, 0);
synth_err(SYNTH_ERR_INVALID_CMD, 0);
return -EINVAL;
}
@ -1226,7 +1230,7 @@ static int __create_synth_event(const char *name, const char *raw_fields)
}
if (n_fields == 0) {
synth_err(SYNTH_ERR_CMD_INCOMPLETE, 0);
synth_err(SYNTH_ERR_INVALID_CMD, 0);
ret = -EINVAL;
goto err;
}
@ -1410,13 +1414,13 @@ static int create_or_delete_synth_event(const char *raw_command)
ret = check_command(raw_command);
if (ret) {
synth_err(SYNTH_ERR_CMD_INCOMPLETE, 0);
synth_err(SYNTH_ERR_INVALID_CMD, 0);
return ret;
}
p = strpbrk(raw_command, " \t");
if (!p && raw_command[0] != '!') {
synth_err(SYNTH_ERR_CMD_INCOMPLETE, 0);
synth_err(SYNTH_ERR_INVALID_CMD, 0);
ret = -EINVAL;
goto free;
}
@ -1993,8 +1997,10 @@ static int create_synth_event(const char *raw_command)
last_cmd_set(raw_command);
p = strpbrk(raw_command, " \t");
if (!p)
if (!p) {
synth_err(SYNTH_ERR_INVALID_CMD, 0);
return -EINVAL;
}
fields = skip_spaces(p);
@ -2007,8 +2013,10 @@ static int create_synth_event(const char *raw_command)
/* This interface accepts group name prefix */
if (strchr(name, '/')) {
len = str_has_prefix(name, SYNTH_SYSTEM "/");
if (len == 0)
if (len == 0) {
synth_err(SYNTH_ERR_INVALID_DYN_CMD, 0);
return -EINVAL;
}
name += len;
}
@ -2016,7 +2024,7 @@ static int create_synth_event(const char *raw_command)
ret = check_command(raw_command + len);
if (ret) {
synth_err(SYNTH_ERR_CMD_INCOMPLETE, 0);
synth_err(SYNTH_ERR_INVALID_CMD, 0);
return ret;
}