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cas_cache: IO classification based on process name.

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Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
This commit is contained in:
Michal Mielewczyk 2019-07-17 10:40:06 -04:00
parent c2eef6fe64
commit 441508a6de
1 changed files with 23 additions and 0 deletions
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23
modules/cas_cache/classifier.c
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@ -499,6 +499,27 @@ static cas_cls_eval_t _cas_cls_pid_test(
return _cas_cls_numeric_test_u(c, ti->pid);
}
/* Process name test function */
static cas_cls_eval_t _cas_cls_process_name_test(
struct cas_classifier *cls, struct cas_cls_condition *c,
struct cas_cls_io *io, ocf_part_id_t part_id)
{
struct cas_cls_string *ctx;
/* 'current' is kernel macro that allows to access control block of
currently executing task */
struct task_struct *ti = current;
char comm[TASK_COMM_LEN];
ctx = c->context;
get_task_comm(comm, ti);
if (strcmp(ctx->string, comm) == 0)
return cas_cls_eval_yes;
return cas_cls_eval_no;
}
/* Array of condition handlers */
static struct cas_cls_condition_handler _handlers[] = {
{ "done", _cas_cls_done_test, _cas_cls_generic_ctr },
@ -514,6 +535,8 @@ static struct cas_cls_condition_handler _handlers[] = {
_cas_cls_generic_dtr },
{ "lba", _cas_cls_lba_test, _cas_cls_numeric_ctr, _cas_cls_generic_dtr },
{ "pid", _cas_cls_pid_test, _cas_cls_numeric_ctr, _cas_cls_generic_dtr },
{ "process_name", _cas_cls_process_name_test, _cas_cls_string_ctr,
_cas_cls_generic_dtr },
#ifdef CAS_WLTH_SUPPORT
{ "wlth", _cas_cls_wlth_test, _cas_cls_numeric_ctr,
_cas_cls_generic_dtr},