From dcb9dbe3c701068aacadebcb4068b23b3d495f3a Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Wed, 18 May 2011 15:42:42 -0700 Subject: hw/9pfs: Add yield support for readdir related coroutines This include readdir, telldir, seekdir, rewinddir. Signed-off-by: Aneesh Kumar K.V --- hw/9pfs/codir.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 hw/9pfs/codir.c (limited to 'hw/9pfs/codir.c') diff --git a/hw/9pfs/codir.c b/hw/9pfs/codir.c new file mode 100644 index 0000000000..47b10df57d --- /dev/null +++ b/hw/9pfs/codir.c @@ -0,0 +1,66 @@ + +/* + * Virtio 9p backend + * + * Copyright IBM, Corp. 2011 + * + * Authors: + * Aneesh Kumar K.V + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#include "fsdev/qemu-fsdev.h" +#include "qemu-thread.h" +#include "qemu-coroutine.h" +#include "virtio-9p-coth.h" + +int v9fs_co_readdir(V9fsState *s, V9fsFidState *fidp, struct dirent **dent) +{ + int err; + + v9fs_co_run_in_worker( + { + errno = 0; + /*FIXME!! need to switch to readdir_r */ + *dent = s->ops->readdir(&s->ctx, fidp->fs.dir); + if (!*dent && errno) { + err = -errno; + } else { + err = 0; + } + }); + return err; +} + +off_t v9fs_co_telldir(V9fsState *s, V9fsFidState *fidp) +{ + off_t err; + + v9fs_co_run_in_worker( + { + err = s->ops->telldir(&s->ctx, fidp->fs.dir); + if (err < 0) { + err = -errno; + } + }); + return err; +} + +void v9fs_co_seekdir(V9fsState *s, V9fsFidState *fidp, off_t offset) +{ + v9fs_co_run_in_worker( + { + s->ops->seekdir(&s->ctx, fidp->fs.dir, offset); + }); +} + +void v9fs_co_rewinddir(V9fsState *s, V9fsFidState *fidp) +{ + v9fs_co_run_in_worker( + { + s->ops->rewinddir(&s->ctx, fidp->fs.dir); + }); +} -- cgit v1.2.1