[Xen-changelog] [qemu-xen master] 9pfs: add cleanup operation in FileOperations

[patchbot@xxxxxxx]

commit 702dbcc274e2ca43be20ba64c758c0ca57dab91d
Author:     Li Qiang <liq3ea@xxxxxxxxx>
AuthorDate: Wed Nov 23 13:53:34 2016 +0100
Commit:     Greg Kurz <groug@xxxxxxxx>
CommitDate: Wed Nov 23 13:53:34 2016 +0100

    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 <liq3ea@xxxxxxxxx>
    Reviewed-by: Greg Kurz <groug@xxxxxxxx>
    Signed-off-by: Greg Kurz <groug@xxxxxxxx>
---
 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 087b5c9..faebd91 100644
--- a/hw/9pfs/9p.c
+++ b/hw/9pfs/9p.c
@@ -3521,6 +3521,9 @@ 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);
@@ -3530,6 +3533,9 @@ 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);
 }
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master

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