9pfs: Introduce futimens file op

Add an futimens operation to the fs driver and use if when a fid has
a valid file descriptor. This is required to support more cases where
the client wants to do an action on an unlinked file which it still
has an open file decriptor for.

Only 9P2000.L was considered.

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <20250312152933.383967-5-groug@kaod.org>
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
index 0b33da8d2a..31e216227c 100644
--- a/hw/9pfs/9p-local.c
+++ b/hw/9pfs/9p-local.c
@@ -1100,6 +1100,14 @@ out:
     return ret;
 }
 
+static int local_futimens(FsContext *s, int fid_type, V9fsFidOpenState *fs,
+                          const struct timespec *times)
+{
+    int fd = local_fid_fd(fid_type, fs);
+
+    return qemu_futimens(fd, times);
+}
+
 static int local_unlinkat_common(FsContext *ctx, int dirfd, const char *name,
                                  int flags)
 {
@@ -1626,4 +1634,5 @@ FileOperations local_ops = {
     .unlinkat = local_unlinkat,
     .has_valid_file_handle = local_has_valid_file_handle,
     .ftruncate = local_ftruncate,
+    .futimens = local_futimens,
 };