[Qemu-devel] [PATCH 1/3] 9pfs: add cleanup operation in FileOperations

[Li Qiang]

From: Li Qiang <address@hidden>

Currently, the backend of VirtFS doesn't have a cleanup
function. This will lead resource leak issues if the backed
driver allocates resources. This patch addresses this issue.

Signed-off-by: Li Qiang <address@hidden>
---
 fsdev/file-op-9p.h | 1 +
 hw/9pfs/9p.c       | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/fsdev/file-op-9p.h b/fsdev/file-op-9p.h
index 6db9fea..a56dc84 100644
--- a/fsdev/file-op-9p.h
+++ b/fsdev/file-op-9p.h
@@ -100,6 +100,7 @@ struct FileOperations
 {
     int (*parse_opts)(QemuOpts *, struct FsDriverEntry *);
     int (*init)(struct FsContext *);
+    void (*cleanup)(struct FsContext *);
     int (*lstat)(FsContext *, V9fsPath *, struct stat *);
     ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t);
     int (*chmod)(FsContext *, V9fsPath *, FsCred *);
diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
index aea7e9d..166b5a7 100644
--- a/hw/9pfs/9p.c
+++ b/hw/9pfs/9p.c
@@ -3532,6 +3532,9 @@ void v9fs_device_unrealize_common(V9fsState *s, Error 
**errp)
 {
     g_free(s->ctx.fs_root);
     g_free(s->tag);
+    if (s->ops->cleanup) {
+        s->ops->cleanup(&s->ctx);
+    }
 }
 
 typedef struct VirtfsCoResetData {
-- 
1.8.3.1