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file-op-9p.h
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/*
* 9p
*
* Copyright IBM, Corp. 2010
*
* Authors:
* Aneesh Kumar K.V <[email protected]>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#ifndef FILE_OP_9P_H
#define FILE_OP_9P_H
#include <dirent.h>
#include <utime.h>
#include <sys/vfs.h>
#include "qemu-fsdev-throttle.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;
typedef struct FsContext FsContext;
typedef struct V9fsPath V9fsPath;
typedef struct ExtendedOps {
int (*get_st_gen)(FsContext *, V9fsPath *, mode_t, uint64_t *);
} ExtendedOps;
/* 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
/*
* uid/gid part of .virtfs_meatadata namespace
*/
#define V9FS_SM_MAPPED_FILE 0x00000020
#define V9FS_RDONLY 0x00000040
#define V9FS_PROXY_SOCK_FD 0x00000080
#define V9FS_PROXY_SOCK_NAME 0x00000100
#define V9FS_SEC_MASK 0x0000003C
typedef struct FileOperations FileOperations;
typedef struct XattrOperations XattrOperations;
/*
* Structure to store the various fsdev's passed through command line.
*/
typedef struct FsDriverEntry {
char *fsdev_id;
char *path;
int export_flags;
FileOperations *ops;
FsThrottle fst;
mode_t fmode;
mode_t dmode;
} FsDriverEntry;
struct FsContext {
uid_t uid;
char *fs_root;
int export_flags;
XattrOperations **xops;
ExtendedOps exops;
FsThrottle *fst;
/* fs driver specific data */
void *private;
mode_t fmode;
mode_t dmode;
};
struct V9fsPath {
uint16_t size;
char *data;
};
typedef union V9fsFidOpenState V9fsFidOpenState;
void cred_init(FsCred *);
struct FileOperations
{
int (*parse_opts)(QemuOpts *, FsDriverEntry *, Error **errp);
int (*init)(FsContext *, Error **errp);
void (*cleanup)(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 *);
struct dirent * (*readdir)(FsContext *, V9fsFidOpenState *);
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);
};
#endif