From f2ef9ae2a512fca1df0d56c226adc24ddf002b8b Mon Sep 17 00:00:00 2001 From: Li Qiang Date: Wed, 23 Nov 2016 13:53:34 +0100 Subject: [PATCH 07/12] 9pfs: add cleanup operation in FileOperations 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 Reviewed-by: Greg Kurz Signed-off-by: Greg Kurz --- fsdev/file-op-9p.h | 1 + hw/9pfs/9p.c | 6 ++++++ 2 files changed, 7 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 ced7b4c..f2a90d4 100644 --- a/hw/9pfs/9p.c +++ b/hw/9pfs/9p.c @@ -3490,6 +3490,9 @@ int v9fs_device_realize_common(V9fsState *s, Error **errp) rc = 0; out: if (rc) { + if (s->ops->cleanup && s->ctx.private) { + s->ops->cleanup(&s->ctx); + } g_free(s->tag); g_free(s->ctx.fs_root); v9fs_path_free(&path); @@ -3499,6 +3502,9 @@ out: void v9fs_device_unrealize_common(V9fsState *s, Error **errp) { + if (s->ops->cleanup) { + s->ops->cleanup(&s->ctx); + } g_free(s->tag); g_free(s->ctx.fs_root); } -- 2.1.4