PPC: e500: msync is 440 only, e500 has real sync
[qemu.git] / fsdev / file-op-9p.h
1 /*
2 * Virtio 9p
3 *
4 * Copyright IBM, Corp. 2010
5 *
6 * Authors:
7 * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 */
13 #ifndef _FILEOP_H
14 #define _FILEOP_H
15 #include <sys/types.h>
16 #include <dirent.h>
17 #include <sys/time.h>
18 #include <utime.h>
19 #include <sys/stat.h>
20 #include <sys/uio.h>
21 #include <sys/vfs.h>
22
23 #define SM_LOCAL_MODE_BITS 0600
24 #define SM_LOCAL_DIR_MODE_BITS 0700
25
26 typedef struct FsCred
27 {
28 uid_t fc_uid;
29 gid_t fc_gid;
30 mode_t fc_mode;
31 dev_t fc_rdev;
32 } FsCred;
33
34 struct xattr_operations;
35 struct FsContext;
36 struct V9fsPath;
37
38 typedef struct extended_ops {
39 int (*get_st_gen)(struct FsContext *, struct V9fsPath *,
40 mode_t, uint64_t *);
41 } extended_ops;
42
43 /* export flags */
44 #define V9FS_IMMEDIATE_WRITEOUT 0x00000001
45 #define V9FS_PATHNAME_FSCONTEXT 0x00000002
46 /*
47 * uid/gid set on fileserver files
48 */
49 #define V9FS_SM_PASSTHROUGH 0x00000004
50 /*
51 * uid/gid part of xattr
52 */
53 #define V9FS_SM_MAPPED 0x00000008
54 /*
55 * Server will try to set uid/gid.
56 * On failure ignore the error.
57 */
58 #define V9FS_SM_NONE 0x00000010
59 #define V9FS_RDONLY 0x00000020
60 #define V9FS_PROXY_SOCK_FD 0x00000040
61 #define V9FS_PROXY_SOCK_NAME 0x00000080
62
63 #define V9FS_SEC_MASK 0x0000001C
64
65
66 typedef struct FileOperations FileOperations;
67 /*
68 * Structure to store the various fsdev's passed through command line.
69 */
70 typedef struct FsDriverEntry {
71 char *fsdev_id;
72 char *path;
73 int export_flags;
74 FileOperations *ops;
75 } FsDriverEntry;
76
77 typedef struct FsContext
78 {
79 uid_t uid;
80 char *fs_root;
81 int export_flags;
82 struct xattr_operations **xops;
83 struct extended_ops exops;
84 /* fs driver specific data */
85 void *private;
86 } FsContext;
87
88 typedef struct V9fsPath {
89 uint16_t size;
90 char *data;
91 } V9fsPath;
92
93 typedef union V9fsFidOpenState V9fsFidOpenState;
94
95 void cred_init(FsCred *);
96
97 struct FileOperations
98 {
99 int (*parse_opts)(QemuOpts *, struct FsDriverEntry *);
100 int (*init)(struct FsContext *);
101 int (*lstat)(FsContext *, V9fsPath *, struct stat *);
102 ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t);
103 int (*chmod)(FsContext *, V9fsPath *, FsCred *);
104 int (*chown)(FsContext *, V9fsPath *, FsCred *);
105 int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *);
106 int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *);
107 int (*remove)(FsContext *, const char *);
108 int (*symlink)(FsContext *, const char *, V9fsPath *,
109 const char *, FsCred *);
110 int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *);
111 int (*setuid)(FsContext *, uid_t);
112 int (*close)(FsContext *, V9fsFidOpenState *);
113 int (*closedir)(FsContext *, V9fsFidOpenState *);
114 int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *);
115 int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *);
116 int (*open2)(FsContext *, V9fsPath *, const char *,
117 int, FsCred *, V9fsFidOpenState *);
118 void (*rewinddir)(FsContext *, V9fsFidOpenState *);
119 off_t (*telldir)(FsContext *, V9fsFidOpenState *);
120 int (*readdir_r)(FsContext *, V9fsFidOpenState *,
121 struct dirent *, struct dirent **);
122 void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t);
123 ssize_t (*preadv)(FsContext *, V9fsFidOpenState *,
124 const struct iovec *, int, off_t);
125 ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *,
126 const struct iovec *, int, off_t);
127 int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *);
128 int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *);
129 int (*rename)(FsContext *, const char *, const char *);
130 int (*truncate)(FsContext *, V9fsPath *, off_t);
131 int (*fsync)(FsContext *, int, V9fsFidOpenState *, int);
132 int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf);
133 ssize_t (*lgetxattr)(FsContext *, V9fsPath *,
134 const char *, void *, size_t);
135 ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t);
136 int (*lsetxattr)(FsContext *, V9fsPath *,
137 const char *, void *, size_t, int);
138 int (*lremovexattr)(FsContext *, V9fsPath *, const char *);
139 int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *);
140 int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name,
141 V9fsPath *newdir, const char *new_name);
142 int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags);
143 void *opaque;
144 };
145
146 #endif