1 /* 2 * 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_9P_COTH_H 16 #define QEMU_9P_COTH_H 17 18 #include "qemu/thread.h" 19 #include "qemu/coroutine.h" 20 #include "qemu/main-loop.h" 21 #include "9p.h" 22 23 /* 24 * we want to use bottom half because we want to make sure the below 25 * sequence of events. 26 * 27 * 1. Yield the coroutine in the QEMU thread. 28 * 2. Submit the coroutine to a worker thread. 29 * 3. Enter the coroutine in the worker thread. 30 * we cannot swap step 1 and 2, because that would imply worker thread 31 * can enter coroutine while step1 is still running 32 */ 33 #define v9fs_co_run_in_worker(code_block) \ 34 do { \ 35 QEMUBH *co_bh; \ 36 co_bh = qemu_bh_new(co_run_in_worker_bh, \ 37 qemu_coroutine_self()); \ 38 qemu_bh_schedule(co_bh); \ 39 /* \ 40 * yield in qemu thread and re-enter back \ 41 * in worker thread \ 42 */ \ 43 qemu_coroutine_yield(); \ 44 qemu_bh_delete(co_bh); \ 45 code_block; \ 46 /* re-enter back to qemu thread */ \ 47 qemu_coroutine_yield(); \ 48 } while (0) 49 50 extern void co_run_in_worker_bh(void *); 51 extern int v9fs_co_readlink(V9fsPDU *, V9fsPath *, V9fsString *); 52 extern int v9fs_co_readdir(V9fsPDU *, V9fsFidState *, struct dirent **); 53 extern off_t v9fs_co_telldir(V9fsPDU *, V9fsFidState *); 54 extern void v9fs_co_seekdir(V9fsPDU *, V9fsFidState *, off_t); 55 extern void v9fs_co_rewinddir(V9fsPDU *, V9fsFidState *); 56 extern int v9fs_co_statfs(V9fsPDU *, V9fsPath *, struct statfs *); 57 extern int v9fs_co_lstat(V9fsPDU *, V9fsPath *, struct stat *); 58 extern int v9fs_co_chmod(V9fsPDU *, V9fsPath *, mode_t); 59 extern int v9fs_co_utimensat(V9fsPDU *, V9fsPath *, struct timespec [2]); 60 extern int v9fs_co_chown(V9fsPDU *, V9fsPath *, uid_t, gid_t); 61 extern int v9fs_co_truncate(V9fsPDU *, V9fsPath *, off_t); 62 extern int v9fs_co_llistxattr(V9fsPDU *, V9fsPath *, void *, size_t); 63 extern int v9fs_co_lgetxattr(V9fsPDU *, V9fsPath *, 64 V9fsString *, void *, size_t); 65 extern int v9fs_co_mknod(V9fsPDU *, V9fsFidState *, V9fsString *, uid_t, 66 gid_t, dev_t, mode_t, struct stat *); 67 extern int v9fs_co_mkdir(V9fsPDU *, V9fsFidState *, V9fsString *, 68 mode_t, uid_t, gid_t, struct stat *); 69 extern int v9fs_co_remove(V9fsPDU *, V9fsPath *); 70 extern int v9fs_co_rename(V9fsPDU *, V9fsPath *, V9fsPath *); 71 extern int v9fs_co_unlinkat(V9fsPDU *, V9fsPath *, V9fsString *, int flags); 72 extern int v9fs_co_renameat(V9fsPDU *, V9fsPath *, V9fsString *, 73 V9fsPath *, V9fsString *); 74 extern int v9fs_co_fstat(V9fsPDU *, V9fsFidState *, struct stat *); 75 extern int v9fs_co_opendir(V9fsPDU *, V9fsFidState *); 76 extern int v9fs_co_open(V9fsPDU *, V9fsFidState *, int); 77 extern int v9fs_co_open2(V9fsPDU *, V9fsFidState *, V9fsString *, 78 gid_t, int, int, struct stat *); 79 extern int v9fs_co_lsetxattr(V9fsPDU *, V9fsPath *, V9fsString *, 80 void *, size_t, int); 81 extern int v9fs_co_lremovexattr(V9fsPDU *, V9fsPath *, V9fsString *); 82 extern int v9fs_co_closedir(V9fsPDU *, V9fsFidOpenState *); 83 extern int v9fs_co_close(V9fsPDU *, V9fsFidOpenState *); 84 extern int v9fs_co_fsync(V9fsPDU *, V9fsFidState *, int); 85 extern int v9fs_co_symlink(V9fsPDU *, V9fsFidState *, V9fsString *, 86 const char *, gid_t, struct stat *); 87 extern int v9fs_co_link(V9fsPDU *, V9fsFidState *, 88 V9fsFidState *, V9fsString *); 89 extern int v9fs_co_pwritev(V9fsPDU *, V9fsFidState *, 90 struct iovec *, int, int64_t); 91 extern int v9fs_co_preadv(V9fsPDU *, V9fsFidState *, 92 struct iovec *, int, int64_t); 93 extern int v9fs_co_name_to_path(V9fsPDU *, V9fsPath *, 94 const char *, V9fsPath *); 95 extern int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t, 96 V9fsStatDotl *v9stat); 97 98 #endif 99