projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 39c0564e VJJ |
1 | /* |
| 2 | * Virtio 9p backend | |
| 3 | * | |
| 4 | * Copyright IBM, Corp. 2010 | |
| 5 | * | |
| 6 | * Authors: | |
| 7 | * Harsh Prateek Bora <harsh@linux.vnet.ibm.com> | |
| 8 | * Venkateswararao Jujjuri(JV) <jvrao@linux.vnet.ibm.com> | |
| 9 | * | |
| 10 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
| 11 | * the COPYING file in the top-level directory. | |
| 12 | * | |
| 13 | */ | |
| 14 | ||
| 15 | #ifndef _QEMU_VIRTIO_9P_COTH_H | |
| 16 | #define _QEMU_VIRTIO_9P_COTH_H | |
| 17 | ||
| 18 | #include "qemu-thread.h" | |
| 19 | #include "qemu-coroutine.h" | |
| ff06030f | 20 | #include "virtio-9p.h" |
| 39c0564e VJJ |
21 | #include <glib.h> |
| 22 | ||
| 23 | typedef struct V9fsThPool { | |
| 24 | int rfd; | |
| 25 | int wfd; | |
| 26 | GThreadPool *pool; | |
| 27 | GAsyncQueue *completed; | |
| 28 | } V9fsThPool; | |
| 29 | ||
| 30 | /* | |
| 31 | * we want to use bottom half because we want to make sure the below | |
| 32 | * sequence of events. | |
| 33 | * | |
| 34 | * 1. Yield the coroutine in the QEMU thread. | |
| 35 | * 2. Submit the coroutine to a worker thread. | |
| 36 | * 3. Enter the coroutine in the worker thread. | |
| 37 | * we cannot swap step 1 and 2, because that would imply worker thread | |
| 38 | * can enter coroutine while step1 is still running | |
| 39 | */ | |
| 40 | #define v9fs_co_run_in_worker(code_block) \ | |
| 41 | do { \ | |
| 42 | QEMUBH *co_bh; \ | |
| 43 | co_bh = qemu_bh_new(co_run_in_worker_bh, \ | |
| 44 | qemu_coroutine_self()); \ | |
| 45 | qemu_bh_schedule(co_bh); \ | |
| 46 | /* \ | |
| 47 | * yeild in qemu thread and re-enter back \ | |
| 48 | * in glib worker thread \ | |
| 49 | */ \ | |
| 50 | qemu_coroutine_yield(); \ | |
| 51 | qemu_bh_delete(co_bh); \ | |
| 52 | code_block; \ | |
| 53 | /* re-enter back to qemu thread */ \ | |
| 54 | qemu_coroutine_yield(); \ | |
| 55 | } while (0) | |
| 56 | ||
| 57 | extern void co_run_in_worker_bh(void *); | |
| 58 | extern int v9fs_init_worker_threads(void); | |
| 86e42d74 | 59 | extern int v9fs_co_readlink(V9fsState *, V9fsString *, V9fsString *); |
| dcb9dbe3 AK |
60 | extern int v9fs_co_readdir(V9fsState *, V9fsFidState *, |
| 61 | struct dirent **); | |
| 62 | extern off_t v9fs_co_telldir(V9fsState *, V9fsFidState *); | |
| 63 | extern void v9fs_co_seekdir(V9fsState *, V9fsFidState *, off_t); | |
| 64 | extern void v9fs_co_rewinddir(V9fsState *, V9fsFidState *); | |
| 94840ff9 | 65 | extern int v9fs_co_statfs(V9fsState *, V9fsString *, struct statfs *); |
| 172198d4 | 66 | extern int v9fs_co_lstat(V9fsState *, V9fsString *, struct stat *); |
| 4011ead2 AK |
67 | extern int v9fs_co_chmod(V9fsState *, V9fsString *, mode_t); |
| 68 | extern int v9fs_co_utimensat(V9fsState *, V9fsString *, struct timespec [2]); | |
| 69 | extern int v9fs_co_chown(V9fsState *, V9fsString *, uid_t, gid_t); | |
| 70 | extern int v9fs_co_truncate(V9fsState *, V9fsString *, off_t); | |
| 39c0564e | 71 | #endif |