108 lines
4.9 KiB
C
108 lines
4.9 KiB
C
/*
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* Virtio 9p backend
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
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* Venkateswararao Jujjuri(JV) <jvrao@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef _QEMU_VIRTIO_9P_COTH_H
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#define _QEMU_VIRTIO_9P_COTH_H
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#include "qemu/thread.h"
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#include "block/coroutine.h"
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#include "virtio-9p.h"
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#include <glib.h>
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typedef struct V9fsThPool {
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int rfd;
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int wfd;
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GThreadPool *pool;
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GAsyncQueue *completed;
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} V9fsThPool;
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/*
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* we want to use bottom half because we want to make sure the below
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* sequence of events.
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*
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* 1. Yield the coroutine in the QEMU thread.
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* 2. Submit the coroutine to a worker thread.
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* 3. Enter the coroutine in the worker thread.
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* we cannot swap step 1 and 2, because that would imply worker thread
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* can enter coroutine while step1 is still running
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*/
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#define v9fs_co_run_in_worker(code_block) \
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do { \
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QEMUBH *co_bh; \
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co_bh = qemu_bh_new(co_run_in_worker_bh, \
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qemu_coroutine_self()); \
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qemu_bh_schedule(co_bh); \
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/* \
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* yield in qemu thread and re-enter back \
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* in glib worker thread \
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*/ \
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qemu_coroutine_yield(); \
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qemu_bh_delete(co_bh); \
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code_block; \
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/* re-enter back to qemu thread */ \
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qemu_coroutine_yield(); \
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} while (0)
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extern void co_run_in_worker_bh(void *);
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extern int v9fs_init_worker_threads(void);
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extern int v9fs_co_readlink(V9fsPDU *, V9fsPath *, V9fsString *);
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extern int v9fs_co_readdir_r(V9fsPDU *, V9fsFidState *,
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struct dirent *, struct dirent **result);
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extern off_t v9fs_co_telldir(V9fsPDU *, V9fsFidState *);
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extern void v9fs_co_seekdir(V9fsPDU *, V9fsFidState *, off_t);
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extern void v9fs_co_rewinddir(V9fsPDU *, V9fsFidState *);
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extern int v9fs_co_statfs(V9fsPDU *, V9fsPath *, struct statfs *);
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extern int v9fs_co_lstat(V9fsPDU *, V9fsPath *, struct stat *);
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extern int v9fs_co_chmod(V9fsPDU *, V9fsPath *, mode_t);
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extern int v9fs_co_utimensat(V9fsPDU *, V9fsPath *, struct timespec [2]);
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extern int v9fs_co_chown(V9fsPDU *, V9fsPath *, uid_t, gid_t);
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extern int v9fs_co_truncate(V9fsPDU *, V9fsPath *, off_t);
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extern int v9fs_co_llistxattr(V9fsPDU *, V9fsPath *, void *, size_t);
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extern int v9fs_co_lgetxattr(V9fsPDU *, V9fsPath *,
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V9fsString *, void *, size_t);
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extern int v9fs_co_mknod(V9fsPDU *, V9fsFidState *, V9fsString *, uid_t,
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gid_t, dev_t, mode_t, struct stat *);
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extern int v9fs_co_mkdir(V9fsPDU *, V9fsFidState *, V9fsString *,
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mode_t, uid_t, gid_t, struct stat *);
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extern int v9fs_co_remove(V9fsPDU *, V9fsPath *);
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extern int v9fs_co_rename(V9fsPDU *, V9fsPath *, V9fsPath *);
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extern int v9fs_co_unlinkat(V9fsPDU *, V9fsPath *, V9fsString *, int flags);
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extern int v9fs_co_renameat(V9fsPDU *, V9fsPath *, V9fsString *,
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V9fsPath *, V9fsString *);
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extern int v9fs_co_fstat(V9fsPDU *, V9fsFidState *, struct stat *);
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extern int v9fs_co_opendir(V9fsPDU *, V9fsFidState *);
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extern int v9fs_co_open(V9fsPDU *, V9fsFidState *, int);
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extern int v9fs_co_open2(V9fsPDU *, V9fsFidState *, V9fsString *,
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gid_t, int, int, struct stat *);
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extern int v9fs_co_lsetxattr(V9fsPDU *, V9fsPath *, V9fsString *,
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void *, size_t, int);
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extern int v9fs_co_lremovexattr(V9fsPDU *, V9fsPath *, V9fsString *);
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extern int v9fs_co_closedir(V9fsPDU *, V9fsFidOpenState *);
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extern int v9fs_co_close(V9fsPDU *, V9fsFidOpenState *);
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extern int v9fs_co_fsync(V9fsPDU *, V9fsFidState *, int);
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extern int v9fs_co_symlink(V9fsPDU *, V9fsFidState *, V9fsString *,
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const char *, gid_t, struct stat *);
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extern int v9fs_co_link(V9fsPDU *, V9fsFidState *,
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V9fsFidState *, V9fsString *);
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extern int v9fs_co_pwritev(V9fsPDU *, V9fsFidState *,
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struct iovec *, int, int64_t);
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extern int v9fs_co_preadv(V9fsPDU *, V9fsFidState *,
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struct iovec *, int, int64_t);
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extern int v9fs_co_name_to_path(V9fsPDU *, V9fsPath *,
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const char *, V9fsPath *);
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extern int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t,
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V9fsStatDotl *v9stat);
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#endif
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