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/*

 * 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 enum

{

    /*

     * Server will try to set uid/gid.

     * On failure ignore the error.

     */

    SM_NONE = 0,

    /*

     * uid/gid set on fileserver files

     */

    SM_PASSTHROUGH = 1,

    /*

     * uid/gid part of xattr

     */

    SM_MAPPED,

} SecModel;

typedef struct FsCred

{

    uid_t   fc_uid;

    gid_t   fc_gid;

    mode_t  fc_mode;

    dev_t   fc_rdev;

} FsCred;

struct xattr_operations;

typedef struct FsContext

{

    char *fs_root;

    SecModel fs_sm;

    uid_t uid;

    struct xattr_operations **xops;

} FsContext;

void cred_init(FsCred *);

typedef struct FileOperations

{

    int (*lstat)(FsContext *, const char *, struct stat *);

    ssize_t (*readlink)(FsContext *, const char *, char *, size_t);

    int (*chmod)(FsContext *, const char *, FsCred *);

    int (*chown)(FsContext *, const char *, FsCred *);

    int (*mknod)(FsContext *, const char *, FsCred *);

    int (*utimensat)(FsContext *, const char *, const struct timespec *);

    int (*remove)(FsContext *, const char *);

    int (*symlink)(FsContext *, const char *, const char *, FsCred *);

    int (*link)(FsContext *, const char *, const char *);

    int (*setuid)(FsContext *, uid_t);

    int (*close)(FsContext *, int);

    int (*closedir)(FsContext *, DIR *);

    DIR *(*opendir)(FsContext *, const char *);

    int (*open)(FsContext *, const char *, int);

    int (*open2)(FsContext *, const char *, int, FsCred *);

    void (*rewinddir)(FsContext *, DIR *);

    off_t (*telldir)(FsContext *, DIR *);

    struct dirent *(*readdir)(FsContext *, DIR *);

    void (*seekdir)(FsContext *, DIR *, off_t);

    ssize_t (*preadv)(FsContext *, int, const struct iovec *, int, off_t);

    ssize_t (*pwritev)(FsContext *, int, const struct iovec *, int, off_t);

    int (*mkdir)(FsContext *, const char *, FsCred *);

    int (*fstat)(FsContext *, int, struct stat *);

    int (*rename)(FsContext *, const char *, const char *);

    int (*truncate)(FsContext *, const char *, off_t);

    int (*fsync)(FsContext *, int, int);

    int (*statfs)(FsContext *s, const char *path, struct statfs *stbuf);

    ssize_t (*lgetxattr)(FsContext *, const char *,

                         const char *, void *, size_t);

    ssize_t (*llistxattr)(FsContext *, const char *, void *, size_t);

    int (*lsetxattr)(FsContext *, const char *,

                     const char *, void *, size_t, int);

    int (*lremovexattr)(FsContext *, const char *, const char *);

    void *opaque;

} FileOperations;

static inline const char *rpath(FsContext *ctx, const char *path)

{

    /* FIXME: so wrong... */

    static char buffer[4096];

    snprintf(buffer, sizeof(buffer), "%s/%s", ctx->fs_root, path);

    return buffer;

}

#endif