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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 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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struct FsContext;
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struct V9fsPath;
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typedef struct extended_ops {
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    int (*get_st_gen)(struct FsContext *, struct V9fsPath *,
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                      mode_t, uint64_t *);
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} extended_ops;
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/* export flags */
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#define V9FS_IMMEDIATE_WRITEOUT     0x00000001
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#define V9FS_PATHNAME_FSCONTEXT     0x00000002
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/*
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 * uid/gid set on fileserver files
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 */
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#define V9FS_SM_PASSTHROUGH         0x00000004
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/*
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 * uid/gid part of xattr
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 */
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#define V9FS_SM_MAPPED              0x00000008
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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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#define V9FS_SM_NONE                0x00000010
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#define V9FS_RDONLY                 0x00000020
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#define V9FS_SEC_MASK               0x0000001C
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typedef struct FileOperations FileOperations;
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/*
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 * Structure to store the various fsdev's passed through command line.
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 */
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typedef struct FsDriverEntry {
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    char *fsdev_id;
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    char *path;
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    int export_flags;
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    FileOperations *ops;
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} FsDriverEntry;
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typedef struct FsContext
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{
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    uid_t uid;
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    char *fs_root;
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    int export_flags;
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    struct xattr_operations **xops;
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    struct extended_ops exops;
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    /* fs driver specific data */
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    void *private;
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} FsContext;
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typedef struct V9fsPath {
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    uint16_t size;
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    char *data;
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} V9fsPath;
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typedef union V9fsFidOpenState V9fsFidOpenState;
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void cred_init(FsCred *);
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struct FileOperations
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{
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    int (*parse_opts)(QemuOpts *, struct FsDriverEntry *);
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    int (*init)(struct FsContext *);
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    int (*lstat)(FsContext *, V9fsPath *, struct stat *);
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    ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t);
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    int (*chmod)(FsContext *, V9fsPath *, FsCred *);
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    int (*chown)(FsContext *, V9fsPath *, FsCred *);
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    int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *);
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    int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *);
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    int (*remove)(FsContext *, const char *);
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    int (*symlink)(FsContext *, const char *, V9fsPath *,
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                   const char *, FsCred *);
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    int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *);
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    int (*setuid)(FsContext *, uid_t);
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    int (*close)(FsContext *, V9fsFidOpenState *);
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    int (*closedir)(FsContext *, V9fsFidOpenState *);
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    int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *);
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    int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *);
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    int (*open2)(FsContext *, V9fsPath *, const char *,
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                 int, FsCred *, V9fsFidOpenState *);
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    void (*rewinddir)(FsContext *, V9fsFidOpenState *);
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    off_t (*telldir)(FsContext *, V9fsFidOpenState *);
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    int (*readdir_r)(FsContext *, V9fsFidOpenState *,
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                     struct dirent *, struct dirent **);
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    void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t);
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    ssize_t (*preadv)(FsContext *, V9fsFidOpenState *,
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                      const struct iovec *, int, off_t);
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    ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *,
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                       const struct iovec *, int, off_t);
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    int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *);
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    int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *);
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    int (*rename)(FsContext *, const char *, const char *);
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    int (*truncate)(FsContext *, V9fsPath *, off_t);
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    int (*fsync)(FsContext *, int, V9fsFidOpenState *, int);
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    int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf);
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    ssize_t (*lgetxattr)(FsContext *, V9fsPath *,
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                         const char *, void *, size_t);
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    ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t);
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    int (*lsetxattr)(FsContext *, V9fsPath *,
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                     const char *, void *, size_t, int);
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    int (*lremovexattr)(FsContext *, V9fsPath *, const char *);
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    int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *);
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    int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name,
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                    V9fsPath *newdir, const char *new_name);
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    int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags);
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    void *opaque;
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};
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#endif