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/*
* Virtio 9p backend
*
* Copyright IBM, Corp. 2010
*
* Authors:
* Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
* Venkateswararao Jujjuri(JV) <jvrao@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#ifndef _QEMU_VIRTIO_9P_COTH_H
#define _QEMU_VIRTIO_9P_COTH_H
#include "qemu-thread.h"
#include "qemu-coroutine.h"
#include "virtio-9p.h"
#include <glib.h>
typedef struct V9fsThPool {
int rfd;
int wfd;
GThreadPool *pool;
GAsyncQueue *completed;
} V9fsThPool;
/*
* we want to use bottom half because we want to make sure the below
* sequence of events.
*
* 1. Yield the coroutine in the QEMU thread.
* 2. Submit the coroutine to a worker thread.
* 3. Enter the coroutine in the worker thread.
* we cannot swap step 1 and 2, because that would imply worker thread
* can enter coroutine while step1 is still running
*/
#define v9fs_co_run_in_worker(code_block) \
do { \
QEMUBH *co_bh; \
co_bh = qemu_bh_new(co_run_in_worker_bh, \
qemu_coroutine_self()); \
qemu_bh_schedule(co_bh); \
/* \
* yeild in qemu thread and re-enter back \
* in glib worker thread \
*/ \
qemu_coroutine_yield(); \
qemu_bh_delete(co_bh); \
code_block; \
/* re-enter back to qemu thread */ \
qemu_coroutine_yield(); \
} while (0)
extern void co_run_in_worker_bh(void *);
extern int v9fs_init_worker_threads(void);
extern int v9fs_co_readlink(V9fsState *, V9fsString *, V9fsString *);
extern int v9fs_co_readdir(V9fsState *, V9fsFidState *,
struct dirent **);
extern off_t v9fs_co_telldir(V9fsState *, V9fsFidState *);
extern void v9fs_co_seekdir(V9fsState *, V9fsFidState *, off_t);
extern void v9fs_co_rewinddir(V9fsState *, V9fsFidState *);
extern int v9fs_co_statfs(V9fsState *, V9fsString *, struct statfs *);
extern int v9fs_co_lstat(V9fsState *, V9fsString *, struct stat *);
extern int v9fs_co_chmod(V9fsState *, V9fsString *, mode_t);
extern int v9fs_co_utimensat(V9fsState *, V9fsString *, struct timespec [2]);
extern int v9fs_co_chown(V9fsState *, V9fsString *, uid_t, gid_t);
extern int v9fs_co_truncate(V9fsState *, V9fsString *, off_t);
extern int v9fs_co_llistxattr(V9fsState *, V9fsString *, void *, size_t);
extern int v9fs_co_lgetxattr(V9fsState *, V9fsString *,
V9fsString *, void *, size_t);
extern int v9fs_co_mknod(V9fsState *, V9fsString *, uid_t,
gid_t, dev_t, mode_t);
extern int v9fs_co_mkdir(V9fsState *, char *, mode_t, uid_t, gid_t);
extern int v9fs_co_remove(V9fsState *, V9fsString *);
#endif
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