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cas_cache: IO classification based on file extension.

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Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
This commit is contained in:
Michal Mielewczyk 2019-07-16 05:51:49 -04:00
parent e36c8c53c6
commit 02f11db364
1 changed files with 34 additions and 0 deletions
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34
modules/cas_cache/classifier.c
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@ -445,6 +445,38 @@ static void _cas_cls_directory_dtr(struct cas_classifier *cls,
kfree(ctx);
}
/* File extension test function */
static cas_cls_eval_t _cas_cls_extension_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;
struct inode *inode;
struct dentry *dentry;
char *extension;
ctx = c->context;
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;
extension = strrchr(dentry->d_name.name, '.');
if (!extension)
return cas_cls_eval_no;
/* First character of @extension is '.', which we don't want to compare */
if (strcmp(ctx->string, extension + 1) == 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 },
@ -456,6 +488,8 @@ static struct cas_cls_condition_handler _handlers[] = {
_cas_cls_generic_dtr },
{ "directory", _cas_cls_directory_test, _cas_cls_directory_ctr,
_cas_cls_directory_dtr },
{ "extension", _cas_cls_extension_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},