From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/block/bounce.c | 31 ++++++++++++++++++++-----------
1 files changed, 20 insertions(+), 11 deletions(-)
diff --git a/kernel/block/bounce.c b/kernel/block/bounce.c
index dc37375..162a6ee 100644
--- a/kernel/block/bounce.c
+++ b/kernel/block/bounce.c
@@ -18,7 +18,7 @@
#include <linux/init.h>
#include <linux/hash.h>
#include <linux/highmem.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/printk.h>
#include <asm/tlbflush.h>
@@ -163,13 +163,13 @@
{
struct bio *bio_orig = bio->bi_private;
struct bio_vec *bvec, orig_vec;
- int i;
struct bvec_iter orig_iter = bio_orig->bi_iter;
+ struct bvec_iter_all iter_all;
/*
* free up bounce indirect pages used
*/
- bio_for_each_segment_all(bvec, bio, i) {
+ bio_for_each_segment_all(bvec, bio, iter_all) {
orig_vec = bio_iter_iovec(bio_orig, orig_iter);
if (bvec->bv_page != orig_vec.bv_page) {
dec_zone_page_state(bvec->bv_page, NR_BOUNCE);
@@ -267,17 +267,21 @@
break;
}
- bio_crypt_clone(bio, bio_src, gfp_mask);
+ if (bio_crypt_clone(bio, bio_src, gfp_mask) < 0)
+ goto err_put;
if (bio_integrity(bio_src) &&
- bio_integrity_clone(bio, bio_src, gfp_mask) < 0) {
- bio_put(bio);
- return NULL;
- }
+ bio_integrity_clone(bio, bio_src, gfp_mask) < 0)
+ goto err_put;
- bio_clone_blkcg_association(bio, bio_src);
+ bio_clone_blkg_association(bio, bio_src);
+ blkcg_bio_issue_init(bio);
return bio;
+
+err_put:
+ bio_put(bio);
+ return NULL;
}
static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
@@ -304,13 +308,18 @@
if (!passthrough && sectors < bio_sectors(*bio_orig)) {
bio = bio_split(*bio_orig, sectors, GFP_NOIO, &bounce_bio_split);
bio_chain(bio, *bio_orig);
- generic_make_request(*bio_orig);
+ submit_bio_noacct(*bio_orig);
*bio_orig = bio;
}
bio = bounce_clone_bio(*bio_orig, GFP_NOIO, passthrough ? NULL :
&bounce_bio_set);
- bio_for_each_segment_all(to, bio, i) {
+ /*
+ * Bvec table can't be updated by bio_for_each_segment_all(),
+ * so retrieve bvec from the table directly. This way is safe
+ * because the 'bio' is single-page bvec.
+ */
+ for (i = 0, to = bio->bi_io_vec; i < bio->bi_vcnt; to++, i++) {
struct page *page = to->bv_page;
if (page_to_pfn(page) <= q->limits.bounce_pfn)
--
Gitblit v1.6.2