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tag: 20120906
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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
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