diff options
Diffstat (limited to 'kernel/trace/trace_dynevent.c')
| -rw-r--r-- | kernel/trace/trace_dynevent.c | 62 |
1 files changed, 28 insertions, 34 deletions
diff --git a/kernel/trace/trace_dynevent.c b/kernel/trace/trace_dynevent.c index 6ffdbc4fda53..f9cfcdc9d1f3 100644 --- a/kernel/trace/trace_dynevent.c +++ b/kernel/trace/trace_dynevent.c @@ -228,27 +228,30 @@ fs_initcall(init_dynamic_event); * dynevent_arg_add - Add an arg to a dynevent_cmd * @cmd: A pointer to the dynevent_cmd struct representing the new event cmd * @arg: The argument to append to the current cmd + * @check_arg: An (optional) pointer to a function checking arg sanity * * Append an argument to a dynevent_cmd. The argument string will be * appended to the current cmd string, followed by a separator, if - * applicable. Before the argument is added, the check_arg() - * function, if defined, is called. + * applicable. Before the argument is added, the @check_arg function, + * if present, will be used to check the sanity of the current arg + * string. * - * The cmd string, separator, and check_arg() function should be set - * using the dynevent_arg_init() before any arguments are added using - * this function. + * The cmd string and separator should be set using the + * dynevent_arg_init() before any arguments are added using this + * function. * * Return: 0 if successful, error otherwise. */ int dynevent_arg_add(struct dynevent_cmd *cmd, - struct dynevent_arg *arg) + struct dynevent_arg *arg, + dynevent_check_arg_fn_t check_arg) { int ret = 0; int delta; char *q; - if (arg->check_arg) { - ret = arg->check_arg(arg); + if (check_arg) { + ret = check_arg(arg); if (ret) return ret; } @@ -269,6 +272,7 @@ int dynevent_arg_add(struct dynevent_cmd *cmd, * dynevent_arg_pair_add - Add an arg pair to a dynevent_cmd * @cmd: A pointer to the dynevent_cmd struct representing the new event cmd * @arg_pair: The argument pair to append to the current cmd + * @check_arg: An (optional) pointer to a function checking arg sanity * * Append an argument pair to a dynevent_cmd. An argument pair * consists of a left-hand-side argument and a right-hand-side @@ -278,24 +282,26 @@ int dynevent_arg_add(struct dynevent_cmd *cmd, * * The lhs argument string will be appended to the current cmd string, * followed by an operator, if applicable, followd by the rhs string, - * followed finally by a separator, if applicable. Before anything is - * added, the check_arg() function, if defined, is called. + * followed finally by a separator, if applicable. Before the + * argument is added, the @check_arg function, if present, will be + * used to check the sanity of the current arg strings. * - * The cmd strings, operator, separator, and check_arg() function - * should be set using the dynevent_arg_pair_init() before any arguments - * are added using this function. + * The cmd strings, operator, and separator should be set using the + * dynevent_arg_pair_init() before any arguments are added using this + * function. * * Return: 0 if successful, error otherwise. */ int dynevent_arg_pair_add(struct dynevent_cmd *cmd, - struct dynevent_arg_pair *arg_pair) + struct dynevent_arg_pair *arg_pair, + dynevent_check_arg_fn_t check_arg) { int ret = 0; int delta; char *q; - if (arg_pair->check_arg) { - ret = arg_pair->check_arg(arg_pair); + if (check_arg) { + ret = check_arg(arg_pair); if (ret) return ret; } @@ -385,20 +391,16 @@ void dynevent_cmd_init(struct dynevent_cmd *cmd, char *buf, int maxlen, /** * dynevent_arg_init - Initialize a dynevent_arg object * @arg: A pointer to the dynevent_arg struct representing the arg - * @check_arg: An (optional) pointer to a function checking arg sanity * @separator: An (optional) separator, appended after adding the arg * * Initialize a dynevent_arg object. A dynevent_arg represents an * object used to append single arguments to the current command - * string. The @check_arg function, if present, will be used to check - * the sanity of the current arg string (which is directly set by the - * caller). After the arg string is successfully appended to the + * string. After the arg string is successfully appended to the * command string, the optional @separator is appended. If no * separator was specified when initializing the arg, a space will be * appended. */ void dynevent_arg_init(struct dynevent_arg *arg, - dynevent_check_arg_fn_t check_arg, char separator) { memset(arg, '\0', sizeof(*arg)); @@ -406,14 +408,11 @@ void dynevent_arg_init(struct dynevent_arg *arg, if (!separator) separator = ' '; arg->separator = separator; - - arg->check_arg = check_arg; } /** * dynevent_arg_pair_init - Initialize a dynevent_arg_pair object * @arg_pair: A pointer to the dynevent_arg_pair struct representing the arg - * @check_arg: An (optional) pointer to a function checking arg sanity * @operator: An (optional) operator, appended after adding the first arg * @separator: An (optional) separator, appended after adding the second arg * @@ -422,16 +421,13 @@ void dynevent_arg_init(struct dynevent_arg *arg, * variable_name;' or 'x+y' to the current command string. An * argument pair consists of a left-hand-side argument and a * right-hand-side argument separated by an operator, which can be - * whitespace, all followed by a separator, if applicable. The - * @check_arg function, if present, will be used to check the sanity - * of the current arg strings (which is directly set by the caller). - * After the first arg string is successfully appended to the command - * string, the optional @operator is appended, followed by the second - * arg and and optional @separator. If no separator was specified - * when initializing the arg, a space will be appended. + * whitespace, all followed by a separator, if applicable. After the + * first arg string is successfully appended to the command string, + * the optional @operator is appended, followed by the second arg and + * and optional @separator. If no separator was specified when + * initializing the arg, a space will be appended. */ void dynevent_arg_pair_init(struct dynevent_arg_pair *arg_pair, - dynevent_check_arg_fn_t check_arg, char operator, char separator) { memset(arg_pair, '\0', sizeof(*arg_pair)); @@ -443,8 +439,6 @@ void dynevent_arg_pair_init(struct dynevent_arg_pair *arg_pair, if (!separator) separator = ' '; arg_pair->separator = separator; - - arg_pair->check_arg = check_arg; } /** |