/* * 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; extern 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 (*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