/* * 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 "block/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); \ /* \ * yield 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(V9fsPDU *, V9fsPath *, V9fsString *); extern int v9fs_co_readdir_r(V9fsPDU *, V9fsFidState *, struct dirent *, struct dirent **result); extern off_t v9fs_co_telldir(V9fsPDU *, V9fsFidState *); extern void v9fs_co_seekdir(V9fsPDU *, V9fsFidState *, off_t); extern void v9fs_co_rewinddir(V9fsPDU *, V9fsFidState *); extern int v9fs_co_statfs(V9fsPDU *, V9fsPath *, struct statfs *); extern int v9fs_co_lstat(V9fsPDU *, V9fsPath *, struct stat *); extern int v9fs_co_chmod(V9fsPDU *, V9fsPath *, mode_t); extern int v9fs_co_utimensat(V9fsPDU *, V9fsPath *, struct timespec [2]); extern int v9fs_co_chown(V9fsPDU *, V9fsPath *, uid_t, gid_t); extern int v9fs_co_truncate(V9fsPDU *, V9fsPath *, off_t); extern int v9fs_co_llistxattr(V9fsPDU *, V9fsPath *, void *, size_t); extern int v9fs_co_lgetxattr(V9fsPDU *, V9fsPath *, V9fsString *, void *, size_t); extern int v9fs_co_mknod(V9fsPDU *, V9fsFidState *, V9fsString *, uid_t, gid_t, dev_t, mode_t, struct stat *); extern int v9fs_co_mkdir(V9fsPDU *, V9fsFidState *, V9fsString *, mode_t, uid_t, gid_t, struct stat *); extern int v9fs_co_remove(V9fsPDU *, V9fsPath *); extern int v9fs_co_rename(V9fsPDU *, V9fsPath *, V9fsPath *); extern int v9fs_co_unlinkat(V9fsPDU *, V9fsPath *, V9fsString *, int flags); extern int v9fs_co_renameat(V9fsPDU *, V9fsPath *, V9fsString *, V9fsPath *, V9fsString *); extern int v9fs_co_fstat(V9fsPDU *, V9fsFidState *, struct stat *); extern int v9fs_co_opendir(V9fsPDU *, V9fsFidState *); extern int v9fs_co_open(V9fsPDU *, V9fsFidState *, int); extern int v9fs_co_open2(V9fsPDU *, V9fsFidState *, V9fsString *, gid_t, int, int, struct stat *); extern int v9fs_co_lsetxattr(V9fsPDU *, V9fsPath *, V9fsString *, void *, size_t, int); extern int v9fs_co_lremovexattr(V9fsPDU *, V9fsPath *, V9fsString *); extern int v9fs_co_closedir(V9fsPDU *, V9fsFidOpenState *); extern int v9fs_co_close(V9fsPDU *, V9fsFidOpenState *); extern int v9fs_co_fsync(V9fsPDU *, V9fsFidState *, int); extern int v9fs_co_symlink(V9fsPDU *, V9fsFidState *, V9fsString *, const char *, gid_t, struct stat *); extern int v9fs_co_link(V9fsPDU *, V9fsFidState *, V9fsFidState *, V9fsString *); extern int v9fs_co_pwritev(V9fsPDU *, V9fsFidState *, struct iovec *, int, int64_t); extern int v9fs_co_preadv(V9fsPDU *, V9fsFidState *, struct iovec *, int, int64_t); extern int v9fs_co_name_to_path(V9fsPDU *, V9fsPath *, const char *, V9fsPath *); extern int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t, V9fsStatDotl *v9stat); #endif