| /* |
| * 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 |