Archipelago » qemu

/*

 * 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

/*

 * 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;

/*

 * Structure to store the various fsdev's passed through command line.

 */

typedef struct FsDriverEntry {

    char *fsdev_id;

    char *path;

    int export_flags;

    FileOperations *ops;

} FsDriverEntry;

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 {

    uint16_t size;

    char *data;

} V9fsPath;

typedef union V9fsFidOpenState V9fsFidOpenState;

void cred_init(FsCred *);

struct FileOperations

{

    int (*parse_opts)(QemuOpts *, struct FsDriverEntry *);

    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;

};

#endif