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/fs/nfs/direct.c | 48 +++++++++++++++++++++++++++++++++++++-----------
1 files changed, 37 insertions(+), 11 deletions(-)
diff --git a/kernel/fs/nfs/direct.c b/kernel/fs/nfs/direct.c
index c220810..5d86ffa 100644
--- a/kernel/fs/nfs/direct.c
+++ b/kernel/fs/nfs/direct.c
@@ -509,21 +509,47 @@
return result;
}
-static void
-nfs_direct_join_group(struct list_head *list, struct inode *inode)
+static void nfs_direct_add_page_head(struct list_head *list,
+ struct nfs_page *req)
{
- struct nfs_page *req, *next;
+ struct nfs_page *head = req->wb_head;
+
+ if (!list_empty(&head->wb_list) || !nfs_lock_request(head))
+ return;
+ if (!list_empty(&head->wb_list)) {
+ nfs_unlock_request(head);
+ return;
+ }
+ list_add(&head->wb_list, list);
+ kref_get(&head->wb_kref);
+ kref_get(&head->wb_kref);
+}
+
+static void nfs_direct_join_group(struct list_head *list,
+ struct nfs_commit_info *cinfo,
+ struct inode *inode)
+{
+ struct nfs_page *req, *subreq;
list_for_each_entry(req, list, wb_list) {
- if (req->wb_head != req || req->wb_this_page == req)
+ if (req->wb_head != req) {
+ nfs_direct_add_page_head(&req->wb_list, req);
continue;
- for (next = req->wb_this_page;
- next != req->wb_head;
- next = next->wb_this_page) {
- nfs_list_remove_request(next);
- nfs_release_request(next);
}
- nfs_join_page_group(req, inode);
+ subreq = req->wb_this_page;
+ if (subreq == req)
+ continue;
+ do {
+ /*
+ * Remove subrequests from this list before freeing
+ * them in the call to nfs_join_page_group().
+ */
+ if (!list_empty(&subreq->wb_list)) {
+ nfs_list_remove_request(subreq);
+ nfs_release_request(subreq);
+ }
+ } while ((subreq = subreq->wb_this_page) != req);
+ nfs_join_page_group(req, cinfo, inode);
}
}
@@ -549,7 +575,7 @@
nfs_init_cinfo_from_dreq(&cinfo, dreq);
nfs_direct_write_scan_commit_list(dreq->inode, &reqs, &cinfo);
- nfs_direct_join_group(&reqs, dreq->inode);
+ nfs_direct_join_group(&reqs, &cinfo, dreq->inode);
dreq->count = 0;
dreq->max_count = 0;
--
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