From: Bharath SM <bharathsm@microsoft.com>
Date: Wed, 26 Apr 2023 14:05:16 +0000
Subject: [PATCH] SMB3: Close deferred file handles in case of handle lease
break
References: bsc#1012628
Patch-mainline: 6.3.2
Git-commit: d906be3fa571f6fc9381911304a0eca99f1b6951
[ Upstream commit d906be3fa571f6fc9381911304a0eca99f1b6951 ]
We should not cache deferred file handles if we dont have
handle lease on a file. And we should immediately close all
deferred handles in case of handle lease break.
Fixes: 9e31678fb403 ("SMB3: fix lease break timeout when multiple deferred close handles for the same file.")
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
fs/cifs/file.c | 16 ++++++++++++++++
fs/cifs/misc.c | 2 +-
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index b33d2e7b..c5fcefdf 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -4882,6 +4882,8 @@ void cifs_oplock_break(struct work_struct *work)
struct TCP_Server_Info *server = tcon->ses->server;
int rc = 0;
bool purge_cache = false;
+ struct cifs_deferred_close *dclose;
+ bool is_deferred = false;
wait_on_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS,
TASK_UNINTERRUPTIBLE);
@@ -4917,6 +4919,20 @@ void cifs_oplock_break(struct work_struct *work)
cifs_dbg(VFS, "Push locks rc = %d\n", rc);
oplock_break_ack:
+ /*
+ * When oplock break is received and there are no active
+ * file handles but cached, then schedule deferred close immediately.
+ * So, new open will not use cached handle.
+ */
+ spin_lock(&CIFS_I(inode)->deferred_lock);
+ is_deferred = cifs_is_deferred_close(cfile, &dclose);
+ spin_unlock(&CIFS_I(inode)->deferred_lock);
+
+ if (!CIFS_CACHE_HANDLE(cinode) && is_deferred &&
+ cfile->deferred_close_scheduled && delayed_work_pending(&cfile->deferred)) {
+ cifs_close_deferred_file(cinode);
+ }
+
/*
* releasing stale oplock after recent reconnect of smb session using
* a now incorrect file handle is not a data integrity issue but do
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index f76e9bb7..cd914be9 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -764,7 +764,7 @@ cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode)
spin_unlock(&cifs_inode->open_file_lock);
list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
- _cifsFileInfo_put(tmp_list->cfile, true, false);
+ _cifsFileInfo_put(tmp_list->cfile, false, false);
list_del(&tmp_list->list);
kfree(tmp_list);
}
--
2.35.3