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