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 <glib.h>
8#include "standard-headers/linux/virtio_9p.h"
9#include "hw/virtio/virtio.h"
10#include "fsdev/file-op-9p.h"
11#include "fsdev/9p-iov-marshal.h"
12#include "qemu/thread.h"
13#include "qemu/coroutine.h"
14
15enum {
16 P9_TLERROR = 6,
17 P9_RLERROR,
18 P9_TSTATFS = 8,
19 P9_RSTATFS,
20 P9_TLOPEN = 12,
21 P9_RLOPEN,
22 P9_TLCREATE = 14,
23 P9_RLCREATE,
24 P9_TSYMLINK = 16,
25 P9_RSYMLINK,
26 P9_TMKNOD = 18,
27 P9_RMKNOD,
28 P9_TRENAME = 20,
29 P9_RRENAME,
30 P9_TREADLINK = 22,
31 P9_RREADLINK,
32 P9_TGETATTR = 24,
33 P9_RGETATTR,
34 P9_TSETATTR = 26,
35 P9_RSETATTR,
36 P9_TXATTRWALK = 30,
37 P9_RXATTRWALK,
38 P9_TXATTRCREATE = 32,
39 P9_RXATTRCREATE,
40 P9_TREADDIR = 40,
41 P9_RREADDIR,
42 P9_TFSYNC = 50,
43 P9_RFSYNC,
44 P9_TLOCK = 52,
45 P9_RLOCK,
46 P9_TGETLOCK = 54,
47 P9_RGETLOCK,
48 P9_TLINK = 70,
49 P9_RLINK,
50 P9_TMKDIR = 72,
51 P9_RMKDIR,
52 P9_TRENAMEAT = 74,
53 P9_RRENAMEAT,
54 P9_TUNLINKAT = 76,
55 P9_RUNLINKAT,
56 P9_TVERSION = 100,
57 P9_RVERSION,
58 P9_TAUTH = 102,
59 P9_RAUTH,
60 P9_TATTACH = 104,
61 P9_RATTACH,
62 P9_TERROR = 106,
63 P9_RERROR,
64 P9_TFLUSH = 108,
65 P9_RFLUSH,
66 P9_TWALK = 110,
67 P9_RWALK,
68 P9_TOPEN = 112,
69 P9_ROPEN,
70 P9_TCREATE = 114,
71 P9_RCREATE,
72 P9_TREAD = 116,
73 P9_RREAD,
74 P9_TWRITE = 118,
75 P9_RWRITE,
76 P9_TCLUNK = 120,
77 P9_RCLUNK,
78 P9_TREMOVE = 122,
79 P9_RREMOVE,
80 P9_TSTAT = 124,
81 P9_RSTAT,
82 P9_TWSTAT = 126,
83 P9_RWSTAT,
84};
85
86
87
88enum {
89 P9_QTDIR = 0x80,
90 P9_QTAPPEND = 0x40,
91 P9_QTEXCL = 0x20,
92 P9_QTMOUNT = 0x10,
93 P9_QTAUTH = 0x08,
94 P9_QTTMP = 0x04,
95 P9_QTSYMLINK = 0x02,
96 P9_QTLINK = 0x01,
97 P9_QTFILE = 0x00,
98};
99
100enum p9_proto_version {
101 V9FS_PROTO_2000U = 0x01,
102 V9FS_PROTO_2000L = 0x02,
103};
104
105#define P9_NOTAG (u16)(~0)
106#define P9_NOFID (u32)(~0)
107#define P9_MAXWELEM 16
108
109#define FID_REFERENCED 0x1
110#define FID_NON_RECLAIMABLE 0x2
111static inline char *rpath(FsContext *ctx, const char *path)
112{
113 return g_strdup_printf("%s/%s", ctx->fs_root, path);
114}
115
116
117
118
119
120#define P9_IOHDRSZ 24
121
122typedef struct V9fsPDU V9fsPDU;
123struct V9fsState;
124
125struct V9fsPDU
126{
127 uint32_t size;
128 uint16_t tag;
129 uint8_t id;
130 uint8_t cancelled;
131 CoQueue complete;
132 struct V9fsState *s;
133 QLIST_ENTRY(V9fsPDU) next;
134 uint32_t idx;
135};
136
137
138
139
140
141
142#define MAX_REQ 128
143#define MAX_TAG_LEN 32
144
145#define BUG_ON(cond) assert(!(cond))
146
147typedef struct V9fsFidState V9fsFidState;
148
149enum {
150 P9_FID_NONE = 0,
151 P9_FID_FILE,
152 P9_FID_DIR,
153 P9_FID_XATTR,
154};
155
156typedef struct V9fsConf
157{
158
159 char *tag;
160 char *fsdev_id;
161} V9fsConf;
162
163typedef struct V9fsXattr
164{
165 int64_t copied_len;
166 int64_t len;
167 void *value;
168 V9fsString name;
169 int flags;
170} V9fsXattr;
171
172
173
174
175
176union V9fsFidOpenState {
177 int fd;
178 DIR *dir;
179 V9fsXattr xattr;
180
181
182
183
184
185 void *private;
186};
187
188struct V9fsFidState
189{
190 int fid_type;
191 int32_t fid;
192 V9fsPath path;
193 V9fsFidOpenState fs;
194 V9fsFidOpenState fs_reclaim;
195 int flags;
196 int open_flags;
197 uid_t uid;
198 int ref;
199 int clunked;
200 V9fsFidState *next;
201 V9fsFidState *rclm_lst;
202};
203
204typedef struct V9fsState
205{
206 QLIST_HEAD(, V9fsPDU) free_list;
207 QLIST_HEAD(, V9fsPDU) active_list;
208 V9fsFidState *fid_list;
209 FileOperations *ops;
210 FsContext ctx;
211 char *tag;
212 enum p9_proto_version proto_version;
213 int32_t msize;
214
215
216
217
218 CoRwlock rename_lock;
219 int32_t root_fid;
220 Error *migration_blocker;
221 V9fsConf fsconf;
222} V9fsState;
223
224
225#define P9_DOTL_RDONLY 00000000
226#define P9_DOTL_WRONLY 00000001
227#define P9_DOTL_RDWR 00000002
228#define P9_DOTL_NOACCESS 00000003
229#define P9_DOTL_CREATE 00000100
230#define P9_DOTL_EXCL 00000200
231#define P9_DOTL_NOCTTY 00000400
232#define P9_DOTL_TRUNC 00001000
233#define P9_DOTL_APPEND 00002000
234#define P9_DOTL_NONBLOCK 00004000
235#define P9_DOTL_DSYNC 00010000
236#define P9_DOTL_FASYNC 00020000
237#define P9_DOTL_DIRECT 00040000
238#define P9_DOTL_LARGEFILE 00100000
239#define P9_DOTL_DIRECTORY 00200000
240#define P9_DOTL_NOFOLLOW 00400000
241#define P9_DOTL_NOATIME 01000000
242#define P9_DOTL_CLOEXEC 02000000
243#define P9_DOTL_SYNC 04000000
244
245
246#define P9_DOTL_AT_REMOVEDIR 0x200
247
248
249#define P9_LOCK_TYPE_RDLCK 0
250#define P9_LOCK_TYPE_WRLCK 1
251#define P9_LOCK_TYPE_UNLCK 2
252
253#define P9_LOCK_SUCCESS 0
254#define P9_LOCK_BLOCKED 1
255#define P9_LOCK_ERROR 2
256#define P9_LOCK_GRACE 3
257
258#define P9_LOCK_FLAGS_BLOCK 1
259#define P9_LOCK_FLAGS_RECLAIM 2
260
261typedef struct V9fsFlock
262{
263 uint8_t type;
264 uint32_t flags;
265 uint64_t start;
266 uint64_t length;
267 uint32_t proc_id;
268 V9fsString client_id;
269} V9fsFlock;
270
271typedef struct V9fsGetlock
272{
273 uint8_t type;
274 uint64_t start;
275 uint64_t length;
276 uint32_t proc_id;
277 V9fsString client_id;
278} V9fsGetlock;
279
280extern int open_fd_hw;
281extern int total_open_fd;
282
283static inline void v9fs_path_write_lock(V9fsState *s)
284{
285 if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
286 qemu_co_rwlock_wrlock(&s->rename_lock);
287 }
288}
289
290static inline void v9fs_path_read_lock(V9fsState *s)
291{
292 if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
293 qemu_co_rwlock_rdlock(&s->rename_lock);
294 }
295}
296
297static inline void v9fs_path_unlock(V9fsState *s)
298{
299 if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
300 qemu_co_rwlock_unlock(&s->rename_lock);
301 }
302}
303
304static inline uint8_t v9fs_request_cancelled(V9fsPDU *pdu)
305{
306 return pdu->cancelled;
307}
308
309extern void v9fs_reclaim_fd(V9fsPDU *pdu);
310extern void v9fs_path_init(V9fsPath *path);
311extern void v9fs_path_free(V9fsPath *path);
312extern void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs);
313extern int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
314 const char *name, V9fsPath *path);
315extern int v9fs_device_realize_common(V9fsState *s, Error **errp);
316extern void v9fs_device_unrealize_common(V9fsState *s, Error **errp);
317
318ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...);
319ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...);
320V9fsPDU *pdu_alloc(V9fsState *s);
321void pdu_free(V9fsPDU *pdu);
322void pdu_submit(V9fsPDU *pdu);
323
324#endif
325
