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/*
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 * Virtio 9p
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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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 *  Aneesh Kumar K.V <aneesh.kumar@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 _FILEOP_H
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#define _FILEOP_H
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#include <sys/types.h>
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#include <dirent.h>
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#include <sys/time.h>
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#include <utime.h>
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#include <sys/stat.h>
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#include <sys/uio.h>
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#include <sys/vfs.h>
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#define SM_LOCAL_MODE_BITS    0600
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#define SM_LOCAL_DIR_MODE_BITS    0700
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typedef enum
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{
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    /*
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     * Server will try to set uid/gid.
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     * On failure ignore the error.
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     */
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    SM_NONE = 0,
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    /*
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     * uid/gid set on fileserver files
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     */
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    SM_PASSTHROUGH = 1,
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    /*
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     * uid/gid part of xattr
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     */
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    SM_MAPPED,
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} SecModel;
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typedef struct FsCred
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{
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    uid_t   fc_uid;
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    gid_t   fc_gid;
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    mode_t  fc_mode;
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    dev_t   fc_rdev;
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} FsCred;
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struct xattr_operations;
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typedef struct FsContext
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{
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    char *fs_root;
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    SecModel fs_sm;
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    uid_t uid;
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    struct xattr_operations **xops;
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} FsContext;
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extern void cred_init(FsCred *);
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typedef struct FileOperations
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{
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    int (*lstat)(FsContext *, const char *, struct stat *);
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    ssize_t (*readlink)(FsContext *, const char *, char *, size_t);
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    int (*chmod)(FsContext *, const char *, FsCred *);
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    int (*chown)(FsContext *, const char *, FsCred *);
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    int (*mknod)(FsContext *, const char *, FsCred *);
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    int (*utimensat)(FsContext *, const char *, const struct timespec *);
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    int (*remove)(FsContext *, const char *);
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    int (*symlink)(FsContext *, const char *, const char *, FsCred *);
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    int (*link)(FsContext *, const char *, const char *);
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    int (*setuid)(FsContext *, uid_t);
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    int (*close)(FsContext *, int);
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    int (*closedir)(FsContext *, DIR *);
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    DIR *(*opendir)(FsContext *, const char *);
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    int (*open)(FsContext *, const char *, int);
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    int (*open2)(FsContext *, const char *, int, FsCred *);
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    void (*rewinddir)(FsContext *, DIR *);
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    off_t (*telldir)(FsContext *, DIR *);
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    struct dirent *(*readdir)(FsContext *, DIR *);
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    void (*seekdir)(FsContext *, DIR *, off_t);
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    ssize_t (*preadv)(FsContext *, int, const struct iovec *, int, off_t);
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    ssize_t (*pwritev)(FsContext *, int, const struct iovec *, int, off_t);
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    int (*mkdir)(FsContext *, const char *, FsCred *);
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    int (*fstat)(FsContext *, int, struct stat *);
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    int (*rename)(FsContext *, const char *, const char *);
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    int (*truncate)(FsContext *, const char *, off_t);
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    int (*fsync)(FsContext *, int);
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    int (*statfs)(FsContext *s, const char *path, struct statfs *stbuf);
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    ssize_t (*lgetxattr)(FsContext *, const char *,
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                         const char *, void *, size_t);
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    ssize_t (*llistxattr)(FsContext *, const char *, void *, size_t);
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    int (*lsetxattr)(FsContext *, const char *,
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                     const char *, void *, size_t, int);
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    int (*lremovexattr)(FsContext *, const char *, const char *);
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    void *opaque;
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} FileOperations;
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static inline const char *rpath(FsContext *ctx, const char *path)
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{
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    /* FIXME: so wrong... */
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    static char buffer[4096];
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    snprintf(buffer, sizeof(buffer), "%s/%s", ctx->fs_root, path);
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    return buffer;
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}
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#endif