Merge remote-tracking branch 'remotes/armbru/tags/pull-qapi-2017-03-16' into staging
[qemu.git] / fsdev / file-op-9p.h
1 /*
2 * 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
14 #ifndef FILE_OP_9P_H
15 #define FILE_OP_9P_H
16
17 #include <dirent.h>
18 #include <utime.h>
19 #include <sys/vfs.h>
20 #include "qemu-fsdev-throttle.h"
21
22 #define SM_LOCAL_MODE_BITS 0600
23 #define SM_LOCAL_DIR_MODE_BITS 0700
24
25 typedef struct FsCred
26 {
27 uid_t fc_uid;
28 gid_t fc_gid;
29 mode_t fc_mode;
30 dev_t fc_rdev;
31 } FsCred;
32
33 struct xattr_operations;
34 struct FsContext;
35 struct V9fsPath;
36
37 typedef struct extended_ops {
38 int (*get_st_gen)(struct FsContext *, struct V9fsPath *,
39 mode_t, uint64_t *);
40 } extended_ops;
41
42 /* export flags */
43 #define V9FS_IMMEDIATE_WRITEOUT 0x00000001
44 #define V9FS_PATHNAME_FSCONTEXT 0x00000002
45 /*
46 * uid/gid set on fileserver files
47 */
48 #define V9FS_SM_PASSTHROUGH 0x00000004
49 /*
50 * uid/gid part of xattr
51 */
52 #define V9FS_SM_MAPPED 0x00000008
53 /*
54 * Server will try to set uid/gid.
55 * On failure ignore the error.
56 */
57 #define V9FS_SM_NONE 0x00000010
58 /*
59 * uid/gid part of .virtfs_meatadata namespace
60 */
61 #define V9FS_SM_MAPPED_FILE 0x00000020
62 #define V9FS_RDONLY 0x00000040
63 #define V9FS_PROXY_SOCK_FD 0x00000080
64 #define V9FS_PROXY_SOCK_NAME 0x00000100
65
66 #define V9FS_SEC_MASK 0x0000003C
67
68
69 typedef struct FileOperations FileOperations;
70 /*
71 * Structure to store the various fsdev's passed through command line.
72 */
73 typedef struct FsDriverEntry {
74 char *fsdev_id;
75 char *path;
76 int export_flags;
77 FileOperations *ops;
78 FsThrottle fst;
79 } FsDriverEntry;
80
81 typedef struct FsContext
82 {
83 uid_t uid;
84 char *fs_root;
85 int export_flags;
86 struct xattr_operations **xops;
87 struct extended_ops exops;
88 FsThrottle *fst;
89 /* fs driver specific data */
90 void *private;
91 } FsContext;
92
93 typedef struct V9fsPath {
94 uint16_t size;
95 char *data;
96 } V9fsPath;
97
98 typedef union V9fsFidOpenState V9fsFidOpenState;
99
100 void cred_init(FsCred *);
101
102 struct FileOperations
103 {
104 int (*parse_opts)(QemuOpts *, struct FsDriverEntry *);
105 int (*init)(struct FsContext *);
106 void (*cleanup)(struct FsContext *);
107 int (*lstat)(FsContext *, V9fsPath *, struct stat *);
108 ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t);
109 int (*chmod)(FsContext *, V9fsPath *, FsCred *);
110 int (*chown)(FsContext *, V9fsPath *, FsCred *);
111 int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *);
112 int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *);
113 int (*remove)(FsContext *, const char *);
114 int (*symlink)(FsContext *, const char *, V9fsPath *,
115 const char *, FsCred *);
116 int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *);
117 int (*setuid)(FsContext *, uid_t);
118 int (*close)(FsContext *, V9fsFidOpenState *);
119 int (*closedir)(FsContext *, V9fsFidOpenState *);
120 int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *);
121 int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *);
122 int (*open2)(FsContext *, V9fsPath *, const char *,
123 int, FsCred *, V9fsFidOpenState *);
124 void (*rewinddir)(FsContext *, V9fsFidOpenState *);
125 off_t (*telldir)(FsContext *, V9fsFidOpenState *);
126 struct dirent * (*readdir)(FsContext *, V9fsFidOpenState *);
127 void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t);
128 ssize_t (*preadv)(FsContext *, V9fsFidOpenState *,
129 const struct iovec *, int, off_t);
130 ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *,
131 const struct iovec *, int, off_t);
132 int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *);
133 int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *);
134 int (*rename)(FsContext *, const char *, const char *);
135 int (*truncate)(FsContext *, V9fsPath *, off_t);
136 int (*fsync)(FsContext *, int, V9fsFidOpenState *, int);
137 int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf);
138 ssize_t (*lgetxattr)(FsContext *, V9fsPath *,
139 const char *, void *, size_t);
140 ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t);
141 int (*lsetxattr)(FsContext *, V9fsPath *,
142 const char *, void *, size_t, int);
143 int (*lremovexattr)(FsContext *, V9fsPath *, const char *);
144 int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *);
145 int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name,
146 V9fsPath *newdir, const char *new_name);
147 int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags);
148 void *opaque;
149 };
150
151 #endif