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cas_cache: IO classification based on offset in file.

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Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
This commit is contained in:
Michal Mielewczyk 2019-07-22 06:18:07 -04:00
parent 441508a6de
commit a93cf22b60
1 changed files with 27 additions and 0 deletions
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27
modules/cas_cache/classifier.c
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@ -520,6 +520,31 @@ static cas_cls_eval_t _cas_cls_process_name_test(
return cas_cls_eval_no;
}
/* File offset test function */
static cas_cls_eval_t _cas_cls_file_offset_test(
struct cas_classifier *cls, struct cas_cls_condition *c,
struct cas_cls_io *io, ocf_part_id_t part_id)
{
struct inode *inode;
struct dentry *dentry;
uint64_t offset;
inode = io->inode;
if (!inode)
return cas_cls_eval_no;
/* I/O target inode dentry */
dentry = _cas_cls_dir_get_inode_dentry(inode);
if (!dentry)
return cas_cls_eval_no;
offset = PAGE_SIZE * io->page->index +
io->bio->bi_io_vec->bv_offset;
return _cas_cls_numeric_test_u(c, offset);
}
/* Array of condition handlers */
static struct cas_cls_condition_handler _handlers[] = {
{ "done", _cas_cls_done_test, _cas_cls_generic_ctr },
@ -537,6 +562,8 @@ static struct cas_cls_condition_handler _handlers[] = {
{ "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 },
{ "file_offset", _cas_cls_file_offset_test, _cas_cls_numeric_ctr,
_cas_cls_generic_dtr },
#ifdef CAS_WLTH_SUPPORT
{ "wlth", _cas_cls_wlth_test, _cas_cls_numeric_ctr,
_cas_cls_generic_dtr},