qemu/fsdev/file-op-9p.h
Aneesh Kumar K.V 8b88827222 hw/9pfs: Use the correct file descriptor in Fsdriver Callback
Fsdriver callback that operate on file descriptor need to
differentiate between directory fd and file fd.

Based on the original patch from Sassan Panahinejad <sassan@sassan.me.uk>

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-12-04 22:35:28 +05:30

134 lines
4.2 KiB
C

/*
* Virtio 9p
*
* Copyright IBM, Corp. 2010
*
* Authors:
* Aneesh Kumar K.V <aneesh.kumar@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 _FILEOP_H
#define _FILEOP_H
#include <sys/types.h>
#include <dirent.h>
#include <sys/time.h>
#include <utime.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <sys/vfs.h>
#define SM_LOCAL_MODE_BITS 0600
#define SM_LOCAL_DIR_MODE_BITS 0700
typedef struct FsCred
{
uid_t fc_uid;
gid_t fc_gid;
mode_t fc_mode;
dev_t fc_rdev;
} FsCred;
struct xattr_operations;
struct FsContext;
struct V9fsPath;
typedef struct extended_ops {
int (*get_st_gen)(struct FsContext *, struct V9fsPath *,
mode_t, uint64_t *);
} extended_ops;
/* export flags */
#define V9FS_IMMEDIATE_WRITEOUT 0x00000001
#define V9FS_PATHNAME_FSCONTEXT 0x00000002
/*
* uid/gid set on fileserver files
*/
#define V9FS_SM_PASSTHROUGH 0x00000004
/*
* uid/gid part of xattr
*/
#define V9FS_SM_MAPPED 0x00000008
/*
* Server will try to set uid/gid.
* On failure ignore the error.
*/
#define V9FS_SM_NONE 0x00000010
#define V9FS_RDONLY 0x00000020
#define V9FS_SEC_MASK 0x0000001C
typedef struct FsContext
{
uid_t uid;
char *fs_root;
int export_flags;
struct xattr_operations **xops;
struct extended_ops exops;
/* fs driver specific data */
void *private;
} FsContext;
typedef struct V9fsPath {
int16_t size;
char *data;
} V9fsPath;
typedef union V9fsFidOpenState V9fsFidOpenState;
void cred_init(FsCred *);
typedef struct FileOperations
{
int (*init)(struct FsContext *);
int (*lstat)(FsContext *, V9fsPath *, struct stat *);
ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t);
int (*chmod)(FsContext *, V9fsPath *, FsCred *);
int (*chown)(FsContext *, V9fsPath *, FsCred *);
int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *);
int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *);
int (*remove)(FsContext *, const char *);
int (*symlink)(FsContext *, const char *, V9fsPath *,
const char *, FsCred *);
int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *);
int (*setuid)(FsContext *, uid_t);
int (*close)(FsContext *, V9fsFidOpenState *);
int (*closedir)(FsContext *, V9fsFidOpenState *);
int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *);
int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *);
int (*open2)(FsContext *, V9fsPath *, const char *,
int, FsCred *, V9fsFidOpenState *);
void (*rewinddir)(FsContext *, V9fsFidOpenState *);
off_t (*telldir)(FsContext *, V9fsFidOpenState *);
int (*readdir_r)(FsContext *, V9fsFidOpenState *,
struct dirent *, struct dirent **);
void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t);
ssize_t (*preadv)(FsContext *, V9fsFidOpenState *,
const struct iovec *, int, off_t);
ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *,
const struct iovec *, int, off_t);
int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *);
int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *);
int (*rename)(FsContext *, const char *, const char *);
int (*truncate)(FsContext *, V9fsPath *, off_t);
int (*fsync)(FsContext *, int, V9fsFidOpenState *, int);
int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf);
ssize_t (*lgetxattr)(FsContext *, V9fsPath *,
const char *, void *, size_t);
ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t);
int (*lsetxattr)(FsContext *, V9fsPath *,
const char *, void *, size_t, int);
int (*lremovexattr)(FsContext *, V9fsPath *, const char *);
int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *);
int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name,
V9fsPath *newdir, const char *new_name);
int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags);
void *opaque;
} FileOperations;
#endif