1#ifndef QEMU_9P_H
2#define QEMU_9P_H
3
4#include <dirent.h>
5#include <utime.h>
6#include <sys/resource.h>
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
12enum {
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
85enum {
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
97enum 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
108static inline char *rpath(FsContext *ctx, const char *path)
109{
110 return g_strdup_printf("%s/%s", ctx->fs_root, path);
111}
112
113
114
115
116
117#define P9_IOHDRSZ 24
118
119typedef struct V9fsPDU V9fsPDU;
120struct V9fsState;
121
122struct V9fsPDU
123{
124 uint32_t size;
125 uint16_t tag;
126 uint8_t id;
127 uint8_t cancelled;
128 CoQueue complete;
129 struct V9fsState *s;
130 QLIST_ENTRY(V9fsPDU) next;
131 uint32_t idx;
132};
133
134
135
136
137
138
139#define MAX_REQ 128
140#define MAX_TAG_LEN 32
141
142#define BUG_ON(cond) assert(!(cond))
143
144typedef struct V9fsFidState V9fsFidState;
145
146enum {
147 P9_FID_NONE = 0,
148 P9_FID_FILE,
149 P9_FID_DIR,
150 P9_FID_XATTR,
151};
152
153typedef struct V9fsConf
154{
155
156 char *tag;
157 char *fsdev_id;
158} V9fsConf;
159
160typedef struct V9fsXattr
161{
162 uint64_t copied_len;
163 uint64_t len;
164 void *value;
165 V9fsString name;
166 int flags;
167 bool xattrwalk_fid;
168} V9fsXattr;
169
170typedef struct V9fsDir {
171 DIR *stream;
172 QemuMutex readdir_mutex;
173} V9fsDir;
174
175static inline void v9fs_readdir_lock(V9fsDir *dir)
176{
177 qemu_mutex_lock(&dir->readdir_mutex);
178}
179
180static inline void v9fs_readdir_unlock(V9fsDir *dir)
181{
182 qemu_mutex_unlock(&dir->readdir_mutex);
183}
184
185static inline void v9fs_readdir_init(V9fsDir *dir)
186{
187 qemu_mutex_init(&dir->readdir_mutex);
188}
189
190
191
192
193
194union V9fsFidOpenState {
195 int fd;
196 V9fsDir dir;
197 V9fsXattr xattr;
198
199
200
201
202
203 void *private;
204};
205
206struct 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
222typedef struct V9fsState
223{
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;
230 enum p9_proto_version proto_version;
231 int32_t msize;
232
233
234
235
236 CoRwlock rename_lock;
237 int32_t root_fid;
238 Error *migration_blocker;
239 V9fsConf fsconf;
240 V9fsQID root_qid;
241} V9fsState;
242
243
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
265#define P9_DOTL_AT_REMOVEDIR 0x200
266
267
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
280typedef struct V9fsFlock
281{
282 uint8_t type;
283 uint32_t flags;
284 uint64_t start;
285 uint64_t length;
286 uint32_t proc_id;
287 V9fsString client_id;
288} V9fsFlock;
289
290typedef struct V9fsGetlock
291{
292 uint8_t type;
293 uint64_t start;
294 uint64_t length;
295 uint32_t proc_id;
296 V9fsString client_id;
297} V9fsGetlock;
298
299extern int open_fd_hw;
300extern int total_open_fd;
301
302static 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
309static 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
316static 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
323static inline uint8_t v9fs_request_cancelled(V9fsPDU *pdu)
324{
325 return pdu->cancelled;
326}
327
328void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu);
329void v9fs_path_init(V9fsPath *path);
330void v9fs_path_free(V9fsPath *path);
331void v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...);
332void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs);
333int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
334 const char *name, V9fsPath *path);
335int v9fs_device_realize_common(V9fsState *s, Error **errp);
336void v9fs_device_unrealize_common(V9fsState *s, Error **errp);
337
338ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...);
339ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...);
340V9fsPDU *pdu_alloc(V9fsState *s);
341void pdu_free(V9fsPDU *pdu);
342void pdu_submit(V9fsPDU *pdu);
343void v9fs_reset(V9fsState *s);
344
345#endif
346
