/* * 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 struct FsCred { uid_t fc_uid; gid_t fc_gid; mode_t fc_mode; dev_t fc_rdev; } FsCred; struct xattr_operations; struct FsContext; struct V9fsPath; typedef struct extended_ops { int (*get_st_gen)(struct FsContext *, struct V9fsPath *, mode_t, uint64_t *); } extended_ops; /* export flags */ #define V9FS_IMMEDIATE_WRITEOUT 0x00000001 #define V9FS_PATHNAME_FSCONTEXT 0x00000002 /* * uid/gid set on fileserver files */ #define V9FS_SM_PASSTHROUGH 0x00000004 /* * uid/gid part of xattr */ #define V9FS_SM_MAPPED 0x00000008 /* * Server will try to set uid/gid. * On failure ignore the error. */ #define V9FS_SM_NONE 0x00000010 /* * uid/gid part of .virtfs_meatadata namespace */ #define V9FS_SM_MAPPED_FILE 0x00000020 #define V9FS_RDONLY 0x00000040 #define V9FS_PROXY_SOCK_FD 0x00000080 #define V9FS_PROXY_SOCK_NAME 0x00000100 #define V9FS_SEC_MASK 0x0000003C typedef struct FileOperations FileOperations; /* * Structure to store the various fsdev's passed through command line. */ typedef struct FsDriverEntry { char *fsdev_id; char *path; int export_flags; FileOperations *ops; } FsDriverEntry; typedef struct FsContext { uid_t uid; char *fs_root; int export_flags; struct xattr_operations **xops; struct extended_ops exops; /* fs driver specific data */ void *private; } FsContext; typedef struct V9fsPath { uint16_t size; char *data; } V9fsPath; typedef union V9fsFidOpenState V9fsFidOpenState; void cred_init(FsCred *); struct FileOperations { int (*parse_opts)(QemuOpts *, struct FsDriverEntry *); int (*init)(struct FsContext *); int (*lstat)(FsContext *, V9fsPath *, struct stat *); ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t); int (*chmod)(FsContext *, V9fsPath *, FsCred *); int (*chown)(FsContext *, V9fsPath *, FsCred *); int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *); int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *); int (*remove)(FsContext *, const char *); int (*symlink)(FsContext *, const char *, V9fsPath *, const char *, FsCred *); int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *); int (*setuid)(FsContext *, uid_t); int (*close)(FsContext *, V9fsFidOpenState *); int (*closedir)(FsContext *, V9fsFidOpenState *); int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *); int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *); int (*open2)(FsContext *, V9fsPath *, const char *, int, FsCred *, V9fsFidOpenState *); void (*rewinddir)(FsContext *, V9fsFidOpenState *); off_t (*telldir)(FsContext *, V9fsFidOpenState *); int (*readdir_r)(FsContext *, V9fsFidOpenState *, struct dirent *, struct dirent **); void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t); ssize_t (*preadv)(FsContext *, V9fsFidOpenState *, const struct iovec *, int, off_t); ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *, const struct iovec *, int, off_t); int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *); int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *); int (*rename)(FsContext *, const char *, const char *); int (*truncate)(FsContext *, V9fsPath *, off_t); int (*fsync)(FsContext *, int, V9fsFidOpenState *, int); int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf); ssize_t (*lgetxattr)(FsContext *, V9fsPath *, const char *, void *, size_t); ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t); int (*lsetxattr)(FsContext *, V9fsPath *, const char *, void *, size_t, int); int (*lremovexattr)(FsContext *, V9fsPath *, const char *); int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *); int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name, V9fsPath *newdir, const char *new_name); int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags); void *opaque; }; #endif