From: Patrick Farrell <pfarrell@whamcloud.com>
Date: Sun, 17 Sep 2023 18:09:01 +0000 (-0400)
Subject: LU-13814 osc: add osc transient page ops
X-Git-Url: https://git.whamcloud.com/gitweb?a=commitdiff_plain;h=refs%2Fchanges%2F77%2F52077%2F10;p=fs%2Flustre-release.git

LU-13814 osc: add osc transient page ops

As part of gradually removing cl_pages for transient pages,
create a special set of OSC page operations for them.

This makes it easier to see what's left for transient pages
and focus on removing that.

Test-Parameters: forjanitoronly
Test-Parameters: fortestonly
Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: I20bbe7535e8df223ec1fff9b940b3063fcc3f8d7
---

diff --git a/lustre/osc/osc_page.c b/lustre/osc/osc_page.c
index 3e8411d..f5b7def 100644
--- a/lustre/osc/osc_page.c
+++ b/lustre/osc/osc_page.c
@@ -233,6 +233,12 @@ static void osc_page_touch(const struct lu_env *env,
 	osc_page_touch_at(env, obj, osc_index(opg), to);
 }
 
+static const struct cl_page_operations osc_transient_page_ops = {
+	.cpo_print         = osc_page_print,
+	.cpo_delete        = osc_page_delete,
+	.cpo_clip           = osc_page_clip,
+};
+
 static const struct cl_page_operations osc_page_ops = {
 	.cpo_print         = osc_page_print,
 	.cpo_delete        = osc_page_delete,
@@ -256,7 +262,6 @@ int osc_page_init(const struct lu_env *env, struct cl_io *io,
 		return result;
 
 	opg->ops_srvlock = osc_io_srvlock(oio);
-	cl_page_slice_add(cl_page, &opg->ops_cl, obj, &osc_page_ops);
 
 	if ((lnet_is_rdma_only_page(cl_page->cp_vmpage) ||
 	    CFS_FAIL_CHECK(OBD_FAIL_OSC_UNALIGNED_RDMA_ONLY)) &&
@@ -270,8 +275,12 @@ int osc_page_init(const struct lu_env *env, struct cl_io *io,
 		return -EINVAL;
 	}
 
-	/* reserve an LRU space for this page */
-	if (cl_page->cp_type == CPT_CACHEABLE) {
+	if (cl_page->cp_type == CPT_TRANSIENT) {
+		cl_page_slice_add(cl_page, &opg->ops_cl, obj,
+				  &osc_transient_page_ops);
+	} else if (cl_page->cp_type == CPT_CACHEABLE) {
+		cl_page_slice_add(cl_page, &opg->ops_cl, obj, &osc_page_ops);
+		/* reserve an LRU space for this page */
 		result = osc_lru_alloc(env, osc_cli(osc), opg);
 		if (result == 0) {
 			result = radix_tree_preload(GFP_NOFS);