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New IO class rule io_direction

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Signed-off-by: Daniel Madej <daniel.madej@huawei.com>
This commit is contained in:
Daniel Madej 2025-03-06 08:39:30 +01:00
parent f37f5afd7b
commit df813d9978
1 changed files with 52 additions and 4 deletions
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56
modules/cas_cache/classifier.c
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@ -221,6 +221,42 @@ static int _cas_cls_string_ctr(struct cas_classifier *cls,
return 0;
}
/* IO direction condition constructor. @data is expected to contain string
* translated to IO direction.
*/
static int _cas_cls_direction_ctr(struct cas_classifier *cls,
struct cas_cls_condition *c, char *data)
{
uint64_t direction;
struct cas_cls_numeric *ctx;
if (!data) {
CAS_CLS_MSG(KERN_ERR, "Missing IO direction specifier\n");
return -EINVAL;
}
if (strncmp("read", data, 5) == 0) {
direction = READ;
} else if (strncmp("write", data, 6) == 0) {
direction = WRITE;
} else {
CAS_CLS_MSG(KERN_ERR, "Invalid IO direction specifier '%s'\n"
" allowed specifiers: 'read', 'write'\n", data);
return -EINVAL;
}
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->operator = cas_cls_numeric_eq;
ctx->v_u64 = direction;
c->context = ctx;
return 0;
}
/* Unsigned int numeric test function */
static cas_cls_eval_t _cas_cls_numeric_test_u(
struct cas_cls_condition *c, uint64_t val)
@ -664,6 +700,14 @@ static cas_cls_eval_t _cas_cls_request_size_test(
return _cas_cls_numeric_test_u(c, CAS_BIO_BISIZE(io->bio));
}
/* Request IO direction test function */
static cas_cls_eval_t _cas_cls_request_direction_test(
struct cas_classifier *cls, struct cas_cls_condition *c,
struct cas_cls_io *io, ocf_part_id_t part_id)
{
return _cas_cls_numeric_test_u(c, bio_data_dir(io->bio));
}
/* Array of condition handlers */
static struct cas_cls_condition_handler _handlers[] = {
{ "done", _cas_cls_done_test, _cas_cls_generic_ctr },
@ -689,6 +733,8 @@ static struct cas_cls_condition_handler _handlers[] = {
_cas_cls_generic_dtr },
{ "request_size", _cas_cls_request_size_test, _cas_cls_numeric_ctr,
_cas_cls_generic_dtr },
{ "io_direction", _cas_cls_request_direction_test,
_cas_cls_direction_ctr, _cas_cls_generic_dtr },
#ifdef CAS_WLTH_SUPPORT
{ "wlth", _cas_cls_wlth_test, _cas_cls_numeric_ctr,
_cas_cls_generic_dtr},
@ -757,7 +803,7 @@ static struct cas_cls_condition * _cas_cls_create_condition(
return c;
}
/* Read single codnition from text input and return cas_cls_condition
/* Read single condition from text input and return cas_cls_condition
* representation. *rule pointer is advanced to point to next condition.
* Input @rule string is modified to speed up parsing (selected bytes are
* overwritten with 0).
@ -765,7 +811,7 @@ static struct cas_cls_condition * _cas_cls_create_condition(
* *l_op contains logical operator from previous condition and gets overwritten
* with operator read from currently parsed condition.
*
* Returns pointer to condition if successfull.
* Returns pointer to condition if successful.
* Returns NULL if no more conditions in string.
* Returns error pointer in case of syntax or runtime error.
*/
@ -1050,9 +1096,11 @@ int cas_cls_rule_create(ocf_cache_t cache,
return -ENOMEM;
r = _cas_cls_rule_create(cls, part_id, _rule);
if (IS_ERR(r))
if (IS_ERR(r)) {
CAS_CLS_DEBUG_MSG(
"Cannot create rule: %s => %d\n", rule, part_id);
ret = _cas_cls_rule_err_to_cass_err(PTR_ERR(r));
else {
} else {
CAS_CLS_DEBUG_MSG("Created rule: %s => %d\n", rule, part_id);
*cls_rule = r;
ret = 0;