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 | uid_t fc_uid; |
27 | gid_t fc_gid; |
28 | mode_t fc_mode; |
29 | dev_t fc_rdev; |
30 | } FsCred; |
31 | |
32 | typedef struct FsContext FsContext; |
33 | typedef struct V9fsPath V9fsPath; |
34 | |
35 | typedef struct ExtendedOps { |
36 | int (*get_st_gen)(FsContext *, V9fsPath *, mode_t, uint64_t *); |
37 | } ExtendedOps; |
38 | |
39 | /* export flags */ |
40 | #define V9FS_IMMEDIATE_WRITEOUT 0x00000001 |
41 | #define V9FS_PATHNAME_FSCONTEXT 0x00000002 |
42 | /* |
43 | * uid/gid set on fileserver files |
44 | */ |
45 | #define V9FS_SM_PASSTHROUGH 0x00000004 |
46 | /* |
47 | * uid/gid part of xattr |
48 | */ |
49 | #define V9FS_SM_MAPPED 0x00000008 |
50 | /* |
51 | * Server will try to set uid/gid. |
52 | * On failure ignore the error. |
53 | */ |
54 | #define V9FS_SM_NONE 0x00000010 |
55 | /* |
56 | * uid/gid part of .virtfs_meatadata namespace |
57 | */ |
58 | #define V9FS_SM_MAPPED_FILE 0x00000020 |
59 | #define V9FS_RDONLY 0x00000040 |
60 | #define V9FS_PROXY_SOCK_FD 0x00000080 |
61 | #define V9FS_PROXY_SOCK_NAME 0x00000100 |
62 | |
63 | #define V9FS_SEC_MASK 0x0000003C |
64 | |
65 | |
66 | typedef struct FileOperations FileOperations; |
67 | typedef struct XattrOperations XattrOperations; |
68 | |
69 | /* |
70 | * Structure to store the various fsdev's passed through command line. |
71 | */ |
72 | typedef struct FsDriverEntry { |
73 | char *fsdev_id; |
74 | char *path; |
75 | int export_flags; |
76 | FileOperations *ops; |
77 | FsThrottle fst; |
78 | mode_t fmode; |
79 | mode_t dmode; |
80 | } FsDriverEntry; |
81 | |
82 | struct FsContext { |
83 | uid_t uid; |
84 | char *fs_root; |
85 | int export_flags; |
86 | XattrOperations **xops; |
87 | ExtendedOps exops; |
88 | FsThrottle *fst; |
89 | /* fs driver specific data */ |
90 | void *private; |
91 | mode_t fmode; |
92 | mode_t dmode; |
93 | }; |
94 | |
95 | struct V9fsPath { |
96 | uint16_t size; |
97 | char *data; |
98 | }; |
99 | |
100 | typedef union V9fsFidOpenState V9fsFidOpenState; |
101 | |
102 | void cred_init(FsCred *); |
103 | |
104 | struct FileOperations |
105 | { |
106 | int (*parse_opts)(QemuOpts *, FsDriverEntry *, Error **errp); |
107 | int (*init)(FsContext *, Error **errp); |
108 | void (*cleanup)(FsContext *); |
109 | int (*lstat)(FsContext *, V9fsPath *, struct stat *); |
110 | ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t); |
111 | int (*chmod)(FsContext *, V9fsPath *, FsCred *); |
112 | int (*chown)(FsContext *, V9fsPath *, FsCred *); |
113 | int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *); |
114 | int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *); |
115 | int (*remove)(FsContext *, const char *); |
116 | int (*symlink)(FsContext *, const char *, V9fsPath *, |
117 | const char *, FsCred *); |
118 | int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *); |
119 | int (*setuid)(FsContext *, uid_t); |
120 | int (*close)(FsContext *, V9fsFidOpenState *); |
121 | int (*closedir)(FsContext *, V9fsFidOpenState *); |
122 | int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *); |
123 | int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *); |
124 | int (*open2)(FsContext *, V9fsPath *, const char *, |
125 | int, FsCred *, V9fsFidOpenState *); |
126 | void (*rewinddir)(FsContext *, V9fsFidOpenState *); |
127 | off_t (*telldir)(FsContext *, V9fsFidOpenState *); |
128 | struct dirent * (*readdir)(FsContext *, V9fsFidOpenState *); |
129 | void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t); |
130 | ssize_t (*preadv)(FsContext *, V9fsFidOpenState *, |
131 | const struct iovec *, int, off_t); |
132 | ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *, |
133 | const struct iovec *, int, off_t); |
134 | int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *); |
135 | int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *); |
136 | int (*rename)(FsContext *, const char *, const char *); |
137 | int (*truncate)(FsContext *, V9fsPath *, off_t); |
138 | int (*fsync)(FsContext *, int, V9fsFidOpenState *, int); |
139 | int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf); |
140 | ssize_t (*lgetxattr)(FsContext *, V9fsPath *, |
141 | const char *, void *, size_t); |
142 | ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t); |
143 | int (*lsetxattr)(FsContext *, V9fsPath *, |
144 | const char *, void *, size_t, int); |
145 | int (*lremovexattr)(FsContext *, V9fsPath *, const char *); |
146 | int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *); |
147 | int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name, |
148 | V9fsPath *newdir, const char *new_name); |
149 | int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags); |
150 | }; |
151 | |
152 | #endif |
153 | |