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2a6a4076 MA |
1 | #ifndef QEMU_9P_H |
2 | #define QEMU_9P_H | |
ebe74f8b | 3 | |
ebe74f8b | 4 | #include <dirent.h> |
ebe74f8b WL |
5 | #include <utime.h> |
6 | #include <sys/resource.h> | |
ebe74f8b WL |
7 | #include "fsdev/file-op-9p.h" |
8 | #include "fsdev/9p-iov-marshal.h" | |
9 | #include "qemu/thread.h" | |
10 | #include "qemu/coroutine.h" | |
11 | ||
12 | enum { | |
13 | P9_TLERROR = 6, | |
14 | P9_RLERROR, | |
15 | P9_TSTATFS = 8, | |
16 | P9_RSTATFS, | |
17 | P9_TLOPEN = 12, | |
18 | P9_RLOPEN, | |
19 | P9_TLCREATE = 14, | |
20 | P9_RLCREATE, | |
21 | P9_TSYMLINK = 16, | |
22 | P9_RSYMLINK, | |
23 | P9_TMKNOD = 18, | |
24 | P9_RMKNOD, | |
25 | P9_TRENAME = 20, | |
26 | P9_RRENAME, | |
27 | P9_TREADLINK = 22, | |
28 | P9_RREADLINK, | |
29 | P9_TGETATTR = 24, | |
30 | P9_RGETATTR, | |
31 | P9_TSETATTR = 26, | |
32 | P9_RSETATTR, | |
33 | P9_TXATTRWALK = 30, | |
34 | P9_RXATTRWALK, | |
35 | P9_TXATTRCREATE = 32, | |
36 | P9_RXATTRCREATE, | |
37 | P9_TREADDIR = 40, | |
38 | P9_RREADDIR, | |
39 | P9_TFSYNC = 50, | |
40 | P9_RFSYNC, | |
41 | P9_TLOCK = 52, | |
42 | P9_RLOCK, | |
43 | P9_TGETLOCK = 54, | |
44 | P9_RGETLOCK, | |
45 | P9_TLINK = 70, | |
46 | P9_RLINK, | |
47 | P9_TMKDIR = 72, | |
48 | P9_RMKDIR, | |
49 | P9_TRENAMEAT = 74, | |
50 | P9_RRENAMEAT, | |
51 | P9_TUNLINKAT = 76, | |
52 | P9_RUNLINKAT, | |
53 | P9_TVERSION = 100, | |
54 | P9_RVERSION, | |
55 | P9_TAUTH = 102, | |
56 | P9_RAUTH, | |
57 | P9_TATTACH = 104, | |
58 | P9_RATTACH, | |
59 | P9_TERROR = 106, | |
60 | P9_RERROR, | |
61 | P9_TFLUSH = 108, | |
62 | P9_RFLUSH, | |
63 | P9_TWALK = 110, | |
64 | P9_RWALK, | |
65 | P9_TOPEN = 112, | |
66 | P9_ROPEN, | |
67 | P9_TCREATE = 114, | |
68 | P9_RCREATE, | |
69 | P9_TREAD = 116, | |
70 | P9_RREAD, | |
71 | P9_TWRITE = 118, | |
72 | P9_RWRITE, | |
73 | P9_TCLUNK = 120, | |
74 | P9_RCLUNK, | |
75 | P9_TREMOVE = 122, | |
76 | P9_RREMOVE, | |
77 | P9_TSTAT = 124, | |
78 | P9_RSTAT, | |
79 | P9_TWSTAT = 126, | |
80 | P9_RWSTAT, | |
81 | }; | |
82 | ||
83 | ||
84 | /* qid.types */ | |
85 | enum { | |
86 | P9_QTDIR = 0x80, | |
87 | P9_QTAPPEND = 0x40, | |
88 | P9_QTEXCL = 0x20, | |
89 | P9_QTMOUNT = 0x10, | |
90 | P9_QTAUTH = 0x08, | |
91 | P9_QTTMP = 0x04, | |
92 | P9_QTSYMLINK = 0x02, | |
93 | P9_QTLINK = 0x01, | |
94 | P9_QTFILE = 0x00, | |
95 | }; | |
96 | ||
97 | enum p9_proto_version { | |
98 | V9FS_PROTO_2000U = 0x01, | |
99 | V9FS_PROTO_2000L = 0x02, | |
100 | }; | |
101 | ||
102 | #define P9_NOTAG (u16)(~0) | |
103 | #define P9_NOFID (u32)(~0) | |
104 | #define P9_MAXWELEM 16 | |
105 | ||
106 | #define FID_REFERENCED 0x1 | |
107 | #define FID_NON_RECLAIMABLE 0x2 | |
108 | static inline char *rpath(FsContext *ctx, const char *path) | |
109 | { | |
110 | return g_strdup_printf("%s/%s", ctx->fs_root, path); | |
111 | } | |
112 | ||
113 | /* | |
114 | * ample room for Twrite/Rread header | |
115 | * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4] | |
116 | */ | |
117 | #define P9_IOHDRSZ 24 | |
118 | ||
119 | typedef struct V9fsPDU V9fsPDU; | |
120 | struct V9fsState; | |
121 | ||
122 | struct V9fsPDU | |
123 | { | |
124 | uint32_t size; | |
125 | uint16_t tag; | |
126 | uint8_t id; | |
127 | uint8_t cancelled; | |
128 | CoQueue complete; | |
ebe74f8b WL |
129 | struct V9fsState *s; |
130 | QLIST_ENTRY(V9fsPDU) next; | |
00588a0a | 131 | uint32_t idx; |
ebe74f8b WL |
132 | }; |
133 | ||
134 | ||
135 | /* FIXME | |
136 | * 1) change user needs to set groups and stuff | |
137 | */ | |
138 | ||
139 | #define MAX_REQ 128 | |
140 | #define MAX_TAG_LEN 32 | |
141 | ||
142 | #define BUG_ON(cond) assert(!(cond)) | |
143 | ||
144 | typedef struct V9fsFidState V9fsFidState; | |
145 | ||
146 | enum { | |
147 | P9_FID_NONE = 0, | |
148 | P9_FID_FILE, | |
149 | P9_FID_DIR, | |
150 | P9_FID_XATTR, | |
151 | }; | |
152 | ||
153 | typedef struct V9fsConf | |
154 | { | |
155 | /* tag name for the device */ | |
156 | char *tag; | |
157 | char *fsdev_id; | |
158 | } V9fsConf; | |
159 | ||
160 | typedef struct V9fsXattr | |
161 | { | |
162 | int64_t copied_len; | |
163 | int64_t len; | |
164 | void *value; | |
165 | V9fsString name; | |
166 | int flags; | |
dd28fbbc | 167 | bool xattrwalk_fid; |
ebe74f8b WL |
168 | } V9fsXattr; |
169 | ||
f314ea4e GK |
170 | typedef struct V9fsDir { |
171 | DIR *stream; | |
7cde47d4 | 172 | QemuMutex readdir_mutex; |
f314ea4e GK |
173 | } V9fsDir; |
174 | ||
7cde47d4 GK |
175 | static inline void v9fs_readdir_lock(V9fsDir *dir) |
176 | { | |
177 | qemu_mutex_lock(&dir->readdir_mutex); | |
178 | } | |
179 | ||
180 | static inline void v9fs_readdir_unlock(V9fsDir *dir) | |
181 | { | |
182 | qemu_mutex_unlock(&dir->readdir_mutex); | |
183 | } | |
184 | ||
185 | static inline void v9fs_readdir_init(V9fsDir *dir) | |
186 | { | |
187 | qemu_mutex_init(&dir->readdir_mutex); | |
188 | } | |
189 | ||
ebe74f8b WL |
190 | /* |
191 | * Filled by fs driver on open and other | |
192 | * calls. | |
193 | */ | |
194 | union V9fsFidOpenState { | |
195 | int fd; | |
f314ea4e | 196 | V9fsDir dir; |
ebe74f8b WL |
197 | V9fsXattr xattr; |
198 | /* | |
199 | * private pointer for fs drivers, that | |
200 | * have its own internal representation of | |
201 | * open files. | |
202 | */ | |
203 | void *private; | |
204 | }; | |
205 | ||
206 | struct V9fsFidState | |
207 | { | |
208 | int fid_type; | |
209 | int32_t fid; | |
210 | V9fsPath path; | |
211 | V9fsFidOpenState fs; | |
212 | V9fsFidOpenState fs_reclaim; | |
213 | int flags; | |
214 | int open_flags; | |
215 | uid_t uid; | |
216 | int ref; | |
217 | int clunked; | |
218 | V9fsFidState *next; | |
219 | V9fsFidState *rclm_lst; | |
220 | }; | |
221 | ||
222 | typedef struct V9fsState | |
223 | { | |
ebe74f8b WL |
224 | QLIST_HEAD(, V9fsPDU) free_list; |
225 | QLIST_HEAD(, V9fsPDU) active_list; | |
226 | V9fsFidState *fid_list; | |
227 | FileOperations *ops; | |
228 | FsContext ctx; | |
229 | char *tag; | |
ebe74f8b WL |
230 | enum p9_proto_version proto_version; |
231 | int32_t msize; | |
232 | /* | |
233 | * lock ensuring atomic path update | |
234 | * on rename. | |
235 | */ | |
236 | CoRwlock rename_lock; | |
237 | int32_t root_fid; | |
238 | Error *migration_blocker; | |
239 | V9fsConf fsconf; | |
56f101ec | 240 | V9fsQID root_qid; |
ebe74f8b WL |
241 | } V9fsState; |
242 | ||
243 | /* 9p2000.L open flags */ | |
244 | #define P9_DOTL_RDONLY 00000000 | |
245 | #define P9_DOTL_WRONLY 00000001 | |
246 | #define P9_DOTL_RDWR 00000002 | |
247 | #define P9_DOTL_NOACCESS 00000003 | |
248 | #define P9_DOTL_CREATE 00000100 | |
249 | #define P9_DOTL_EXCL 00000200 | |
250 | #define P9_DOTL_NOCTTY 00000400 | |
251 | #define P9_DOTL_TRUNC 00001000 | |
252 | #define P9_DOTL_APPEND 00002000 | |
253 | #define P9_DOTL_NONBLOCK 00004000 | |
254 | #define P9_DOTL_DSYNC 00010000 | |
255 | #define P9_DOTL_FASYNC 00020000 | |
256 | #define P9_DOTL_DIRECT 00040000 | |
257 | #define P9_DOTL_LARGEFILE 00100000 | |
258 | #define P9_DOTL_DIRECTORY 00200000 | |
259 | #define P9_DOTL_NOFOLLOW 00400000 | |
260 | #define P9_DOTL_NOATIME 01000000 | |
261 | #define P9_DOTL_CLOEXEC 02000000 | |
262 | #define P9_DOTL_SYNC 04000000 | |
263 | ||
264 | /* 9p2000.L at flags */ | |
265 | #define P9_DOTL_AT_REMOVEDIR 0x200 | |
266 | ||
267 | /* 9P2000.L lock type */ | |
268 | #define P9_LOCK_TYPE_RDLCK 0 | |
269 | #define P9_LOCK_TYPE_WRLCK 1 | |
270 | #define P9_LOCK_TYPE_UNLCK 2 | |
271 | ||
272 | #define P9_LOCK_SUCCESS 0 | |
273 | #define P9_LOCK_BLOCKED 1 | |
274 | #define P9_LOCK_ERROR 2 | |
275 | #define P9_LOCK_GRACE 3 | |
276 | ||
277 | #define P9_LOCK_FLAGS_BLOCK 1 | |
278 | #define P9_LOCK_FLAGS_RECLAIM 2 | |
279 | ||
280 | typedef struct V9fsFlock | |
281 | { | |
282 | uint8_t type; | |
283 | uint32_t flags; | |
284 | uint64_t start; /* absolute offset */ | |
285 | uint64_t length; | |
286 | uint32_t proc_id; | |
287 | V9fsString client_id; | |
288 | } V9fsFlock; | |
289 | ||
290 | typedef struct V9fsGetlock | |
291 | { | |
292 | uint8_t type; | |
293 | uint64_t start; /* absolute offset */ | |
294 | uint64_t length; | |
295 | uint32_t proc_id; | |
296 | V9fsString client_id; | |
297 | } V9fsGetlock; | |
298 | ||
299 | extern int open_fd_hw; | |
300 | extern int total_open_fd; | |
301 | ||
302 | static inline void v9fs_path_write_lock(V9fsState *s) | |
303 | { | |
304 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { | |
305 | qemu_co_rwlock_wrlock(&s->rename_lock); | |
306 | } | |
307 | } | |
308 | ||
309 | static inline void v9fs_path_read_lock(V9fsState *s) | |
310 | { | |
311 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { | |
312 | qemu_co_rwlock_rdlock(&s->rename_lock); | |
313 | } | |
314 | } | |
315 | ||
316 | static inline void v9fs_path_unlock(V9fsState *s) | |
317 | { | |
318 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { | |
319 | qemu_co_rwlock_unlock(&s->rename_lock); | |
320 | } | |
321 | } | |
322 | ||
323 | static inline uint8_t v9fs_request_cancelled(V9fsPDU *pdu) | |
324 | { | |
325 | return pdu->cancelled; | |
326 | } | |
327 | ||
8440e22e | 328 | void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu); |
bc70a592 GK |
329 | void v9fs_path_init(V9fsPath *path); |
330 | void v9fs_path_free(V9fsPath *path); | |
331 | void v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...); | |
332 | void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs); | |
333 | int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, | |
334 | const char *name, V9fsPath *path); | |
335 | int v9fs_device_realize_common(V9fsState *s, Error **errp); | |
336 | void v9fs_device_unrealize_common(V9fsState *s, Error **errp); | |
ebe74f8b WL |
337 | |
338 | ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...); | |
339 | ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...); | |
4b311c5f WL |
340 | V9fsPDU *pdu_alloc(V9fsState *s); |
341 | void pdu_free(V9fsPDU *pdu); | |
342 | void pdu_submit(V9fsPDU *pdu); | |
0e44a0fd | 343 | void v9fs_reset(V9fsState *s); |
ebe74f8b WL |
344 | |
345 | #endif |