This is a note to let you know that I've just added the patch titled
ksmbd: lazy v2 lease break on smb2_write()
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ksmbd-lazy-v2-lease-break-on-smb2_write.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c9626e2457663b84804fd5d00bf57452cd96ad2e
Author: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Date: Sun Dec 31 16:13:30 2023 +0900
ksmbd: lazy v2 lease break on smb2_write()
[ Upstream commit c2a721eead71202a0d8ddd9b56ec8dce652c71d1 ]
Don't immediately send directory lease break notification on smb2_write().
Instead, It postpones it until smb2_close().
Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/smb/server/oplock.c b/fs/smb/server/oplock.c
index 4a8745b3e8304..af0f6914eca45 100644
--- a/fs/smb/server/oplock.c
+++ b/fs/smb/server/oplock.c
@@ -396,8 +396,8 @@ void close_id_del_oplock(struct ksmbd_file *fp)
{
struct oplock_info *opinfo;
- if (S_ISDIR(file_inode(fp->filp)->i_mode))
- return;
+ if (fp->reserve_lease_break)
+ smb_lazy_parent_lease_break_close(fp);
opinfo = opinfo_get(fp);
if (!opinfo)
@@ -1127,6 +1127,47 @@ void smb_send_parent_lease_break_noti(struct ksmbd_file *fp,
ksmbd_inode_put(p_ci);
}
+void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp)
+{
+ struct oplock_info *opinfo;
+ struct ksmbd_inode *p_ci = NULL;
+
+ rcu_read_lock();
+ opinfo = rcu_dereference(fp->f_opinfo);
+ rcu_read_unlock();
+
+ if (!opinfo->is_lease || opinfo->o_lease->version != 2)
+ return;
+
+ p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent);
+ if (!p_ci)
+ return;
+
+ read_lock(&p_ci->m_lock);
+ list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) {
+ if (!opinfo->is_lease)
+ continue;
+
+ if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE) {
+ if (!atomic_inc_not_zero(&opinfo->refcount))
+ continue;
+
+ atomic_inc(&opinfo->conn->r_count);
+ if (ksmbd_conn_releasing(opinfo->conn)) {
+ atomic_dec(&opinfo->conn->r_count);
+ continue;
+ }
+ read_unlock(&p_ci->m_lock);
+ oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE);
+ opinfo_conn_put(opinfo);
+ read_lock(&p_ci->m_lock);
+ }
+ }
+ read_unlock(&p_ci->m_lock);
+
+ ksmbd_inode_put(p_ci);
+}
+
/**
* smb_grant_oplock() - handle oplock/lease request on file open
* @work: smb work
diff --git a/fs/smb/server/oplock.h b/fs/smb/server/oplock.h
index b64d1536882a1..5b93ea9196c01 100644
--- a/fs/smb/server/oplock.h
+++ b/fs/smb/server/oplock.h
@@ -129,4 +129,5 @@ int find_same_lease_key(struct ksmbd_session *sess, struct ksmbd_inode *ci,
void destroy_lease_table(struct ksmbd_conn *conn);
void smb_send_parent_lease_break_noti(struct ksmbd_file *fp,
struct lease_ctx_info *lctx);
+void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp);
#endif /* __KSMBD_OPLOCK_H */
diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c
index 42f270ee399c7..fe2c80ea2e47e 100644
--- a/fs/smb/server/vfs.c
+++ b/fs/smb/server/vfs.c
@@ -518,6 +518,9 @@ int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
}
}
+ /* Reserve lease break for parent dir at closing time */
+ fp->reserve_lease_break = true;
+
/* Do we need to break any of a levelII oplock? */
smb_break_all_levII_oplock(work, fp, 1);
diff --git a/fs/smb/server/vfs_cache.h b/fs/smb/server/vfs_cache.h
index 4d4938d6029b6..a528f0cc775ae 100644
--- a/fs/smb/server/vfs_cache.h
+++ b/fs/smb/server/vfs_cache.h
@@ -105,6 +105,7 @@ struct ksmbd_file {
struct ksmbd_readdir_data readdir_data;
int dot_dotdot[2];
unsigned int f_state;
+ bool reserve_lease_break;
};
static inline void set_ctx_actor(struct dir_context *ctx,
