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1.1 root 1: #ifndef _QEMU_VIRTIO_9P_H
2: #define _QEMU_VIRTIO_9P_H
3:
4: #include <sys/types.h>
5: #include <dirent.h>
6: #include <sys/time.h>
7: #include <utime.h>
1.1.1.2 root 8: #include <sys/resource.h>
9: #include "hw/virtio.h"
1.1 root 10: #include "fsdev/file-op-9p.h"
1.1.1.3 ! root 11: #include "fsdev/virtio-9p-marshal.h"
1.1.1.2 root 12: #include "qemu-thread.h"
13: #include "qemu-coroutine.h"
1.1 root 14:
1.1.1.3 ! root 15:
1.1 root 16: /* The feature bitmap for virtio 9P */
17: /* The mount point is specified in a config variable */
18: #define VIRTIO_9P_MOUNT_TAG 0
19:
20: enum {
21: P9_TLERROR = 6,
22: P9_RLERROR,
23: P9_TSTATFS = 8,
24: P9_RSTATFS,
25: P9_TLOPEN = 12,
26: P9_RLOPEN,
27: P9_TLCREATE = 14,
28: P9_RLCREATE,
29: P9_TSYMLINK = 16,
30: P9_RSYMLINK,
31: P9_TMKNOD = 18,
32: P9_RMKNOD,
33: P9_TRENAME = 20,
34: P9_RRENAME,
35: P9_TREADLINK = 22,
36: P9_RREADLINK,
37: P9_TGETATTR = 24,
38: P9_RGETATTR,
39: P9_TSETATTR = 26,
40: P9_RSETATTR,
41: P9_TXATTRWALK = 30,
42: P9_RXATTRWALK,
43: P9_TXATTRCREATE = 32,
44: P9_RXATTRCREATE,
45: P9_TREADDIR = 40,
46: P9_RREADDIR,
47: P9_TFSYNC = 50,
48: P9_RFSYNC,
49: P9_TLOCK = 52,
50: P9_RLOCK,
51: P9_TGETLOCK = 54,
52: P9_RGETLOCK,
53: P9_TLINK = 70,
54: P9_RLINK,
55: P9_TMKDIR = 72,
56: P9_RMKDIR,
1.1.1.2 root 57: P9_TRENAMEAT = 74,
58: P9_RRENAMEAT,
59: P9_TUNLINKAT = 76,
60: P9_RUNLINKAT,
1.1 root 61: P9_TVERSION = 100,
62: P9_RVERSION,
63: P9_TAUTH = 102,
64: P9_RAUTH,
65: P9_TATTACH = 104,
66: P9_RATTACH,
67: P9_TERROR = 106,
68: P9_RERROR,
69: P9_TFLUSH = 108,
70: P9_RFLUSH,
71: P9_TWALK = 110,
72: P9_RWALK,
73: P9_TOPEN = 112,
74: P9_ROPEN,
75: P9_TCREATE = 114,
76: P9_RCREATE,
77: P9_TREAD = 116,
78: P9_RREAD,
79: P9_TWRITE = 118,
80: P9_RWRITE,
81: P9_TCLUNK = 120,
82: P9_RCLUNK,
83: P9_TREMOVE = 122,
84: P9_RREMOVE,
85: P9_TSTAT = 124,
86: P9_RSTAT,
87: P9_TWSTAT = 126,
88: P9_RWSTAT,
89: };
90:
91:
92: /* qid.types */
93: enum {
94: P9_QTDIR = 0x80,
95: P9_QTAPPEND = 0x40,
96: P9_QTEXCL = 0x20,
97: P9_QTMOUNT = 0x10,
98: P9_QTAUTH = 0x08,
99: P9_QTTMP = 0x04,
100: P9_QTSYMLINK = 0x02,
101: P9_QTLINK = 0x01,
102: P9_QTFILE = 0x00,
103: };
104:
105: enum p9_proto_version {
106: V9FS_PROTO_2000U = 0x01,
107: V9FS_PROTO_2000L = 0x02,
108: };
109:
110: #define P9_NOTAG (u16)(~0)
111: #define P9_NOFID (u32)(~0)
112: #define P9_MAXWELEM 16
1.1.1.2 root 113:
114: #define FID_REFERENCED 0x1
115: #define FID_NON_RECLAIMABLE 0x2
1.1 root 116: static inline const char *rpath(FsContext *ctx, const char *path, char *buffer)
117: {
118: snprintf(buffer, PATH_MAX, "%s/%s", ctx->fs_root, path);
119: return buffer;
120: }
121:
122: /*
123: * ample room for Twrite/Rread header
124: * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4]
125: */
126: #define P9_IOHDRSZ 24
127:
128: typedef struct V9fsPDU V9fsPDU;
1.1.1.2 root 129: struct V9fsState;
1.1 root 130:
131: struct V9fsPDU
132: {
133: uint32_t size;
134: uint16_t tag;
135: uint8_t id;
1.1.1.2 root 136: uint8_t cancelled;
137: CoQueue complete;
1.1 root 138: VirtQueueElement elem;
1.1.1.2 root 139: struct V9fsState *s;
1.1 root 140: QLIST_ENTRY(V9fsPDU) next;
141: };
142:
143:
144: /* FIXME
145: * 1) change user needs to set groups and stuff
146: */
147:
148: /* from Linux's linux/virtio_9p.h */
149:
150: /* The ID for virtio console */
151: #define VIRTIO_ID_9P 9
152: #define MAX_REQ 128
153: #define MAX_TAG_LEN 32
154:
155: #define BUG_ON(cond) assert(!(cond))
156:
157: typedef struct V9fsFidState V9fsFidState;
158:
159: enum {
160: P9_FID_NONE = 0,
161: P9_FID_FILE,
162: P9_FID_DIR,
163: P9_FID_XATTR,
164: };
165:
166: typedef struct V9fsXattr
167: {
168: int64_t copied_len;
169: int64_t len;
170: void *value;
171: V9fsString name;
172: int flags;
173: } V9fsXattr;
174:
1.1.1.2 root 175: /*
176: * Filled by fs driver on open and other
177: * calls.
178: */
179: union V9fsFidOpenState {
180: int fd;
181: DIR *dir;
182: V9fsXattr xattr;
183: /*
184: * private pointer for fs drivers, that
185: * have its own internal representation of
186: * open files.
187: */
188: void *private;
189: };
190:
1.1 root 191: struct V9fsFidState
192: {
193: int fid_type;
194: int32_t fid;
1.1.1.2 root 195: V9fsPath path;
196: V9fsFidOpenState fs;
197: V9fsFidOpenState fs_reclaim;
198: int flags;
199: int open_flags;
1.1 root 200: uid_t uid;
1.1.1.2 root 201: int ref;
202: int clunked;
1.1 root 203: V9fsFidState *next;
1.1.1.2 root 204: V9fsFidState *rclm_lst;
1.1 root 205: };
206:
207: typedef struct V9fsState
208: {
209: VirtIODevice vdev;
210: VirtQueue *vq;
211: V9fsPDU pdus[MAX_REQ];
212: QLIST_HEAD(, V9fsPDU) free_list;
1.1.1.2 root 213: QLIST_HEAD(, V9fsPDU) active_list;
1.1 root 214: V9fsFidState *fid_list;
215: FileOperations *ops;
216: FsContext ctx;
1.1.1.2 root 217: char *tag;
1.1 root 218: size_t config_size;
219: enum p9_proto_version proto_version;
220: int32_t msize;
1.1.1.2 root 221: /*
222: * lock ensuring atomic path update
223: * on rename.
224: */
225: CoRwlock rename_lock;
226: int32_t root_fid;
227: Error *migration_blocker;
1.1 root 228: } V9fsState;
229:
230: typedef struct V9fsStatState {
231: V9fsPDU *pdu;
232: size_t offset;
233: V9fsStat v9stat;
234: V9fsFidState *fidp;
235: struct stat stbuf;
236: } V9fsStatState;
237:
238: typedef struct V9fsOpenState {
239: V9fsPDU *pdu;
240: size_t offset;
241: int32_t mode;
242: V9fsFidState *fidp;
243: V9fsQID qid;
244: struct stat stbuf;
245: int iounit;
246: } V9fsOpenState;
247:
248: typedef struct V9fsReadState {
249: V9fsPDU *pdu;
250: size_t offset;
251: int32_t count;
252: int32_t total;
253: int64_t off;
254: V9fsFidState *fidp;
255: struct iovec iov[128]; /* FIXME: bad, bad, bad */
256: struct iovec *sg;
257: off_t dir_pos;
258: struct dirent *dent;
259: struct stat stbuf;
260: V9fsString name;
261: V9fsStat v9stat;
262: int32_t len;
263: int32_t cnt;
264: int32_t max_count;
265: } V9fsReadState;
266:
267: typedef struct V9fsWriteState {
268: V9fsPDU *pdu;
269: size_t offset;
270: int32_t len;
271: int32_t count;
272: int32_t total;
273: int64_t off;
274: V9fsFidState *fidp;
275: struct iovec iov[128]; /* FIXME: bad, bad, bad */
276: struct iovec *sg;
277: int cnt;
278: } V9fsWriteState;
279:
280: struct virtio_9p_config
281: {
282: /* number of characters in tag */
283: uint16_t tag_len;
284: /* Variable size tag name */
285: uint8_t tag[0];
1.1.1.2 root 286: } QEMU_PACKED;
1.1 root 287:
288: typedef struct V9fsMkState {
289: V9fsPDU *pdu;
290: size_t offset;
291: V9fsQID qid;
292: struct stat stbuf;
293: V9fsString name;
294: V9fsString fullname;
295: } V9fsMkState;
296:
1.1.1.2 root 297: /* 9p2000.L open flags */
298: #define P9_DOTL_RDONLY 00000000
299: #define P9_DOTL_WRONLY 00000001
300: #define P9_DOTL_RDWR 00000002
301: #define P9_DOTL_NOACCESS 00000003
302: #define P9_DOTL_CREATE 00000100
303: #define P9_DOTL_EXCL 00000200
304: #define P9_DOTL_NOCTTY 00000400
305: #define P9_DOTL_TRUNC 00001000
306: #define P9_DOTL_APPEND 00002000
307: #define P9_DOTL_NONBLOCK 00004000
308: #define P9_DOTL_DSYNC 00010000
309: #define P9_DOTL_FASYNC 00020000
310: #define P9_DOTL_DIRECT 00040000
311: #define P9_DOTL_LARGEFILE 00100000
312: #define P9_DOTL_DIRECTORY 00200000
313: #define P9_DOTL_NOFOLLOW 00400000
314: #define P9_DOTL_NOATIME 01000000
315: #define P9_DOTL_CLOEXEC 02000000
316: #define P9_DOTL_SYNC 04000000
317:
318: /* 9p2000.L at flags */
319: #define P9_DOTL_AT_REMOVEDIR 0x200
320:
321: /* 9P2000.L lock type */
322: #define P9_LOCK_TYPE_RDLCK 0
323: #define P9_LOCK_TYPE_WRLCK 1
324: #define P9_LOCK_TYPE_UNLCK 2
1.1 root 325:
326: #define P9_LOCK_SUCCESS 0
327: #define P9_LOCK_BLOCKED 1
328: #define P9_LOCK_ERROR 2
329: #define P9_LOCK_GRACE 3
330:
331: #define P9_LOCK_FLAGS_BLOCK 1
332: #define P9_LOCK_FLAGS_RECLAIM 2
333:
334: typedef struct V9fsFlock
335: {
336: uint8_t type;
337: uint32_t flags;
338: uint64_t start; /* absolute offset */
339: uint64_t length;
340: uint32_t proc_id;
341: V9fsString client_id;
342: } V9fsFlock;
343:
344: typedef struct V9fsGetlock
345: {
346: uint8_t type;
347: uint64_t start; /* absolute offset */
348: uint64_t length;
349: uint32_t proc_id;
350: V9fsString client_id;
351: } V9fsGetlock;
352:
1.1.1.2 root 353: extern int open_fd_hw;
354: extern int total_open_fd;
1.1 root 355:
356: size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
357: size_t offset, size_t size, int pack);
358:
359: static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
360: size_t offset, size_t size)
361: {
362: return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
363: }
364:
1.1.1.2 root 365: static inline void v9fs_path_write_lock(V9fsState *s)
366: {
367: if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
368: qemu_co_rwlock_wrlock(&s->rename_lock);
369: }
370: }
1.1 root 371:
1.1.1.2 root 372: static inline void v9fs_path_read_lock(V9fsState *s)
373: {
374: if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
375: qemu_co_rwlock_rdlock(&s->rename_lock);
376: }
377: }
378:
379: static inline void v9fs_path_unlock(V9fsState *s)
380: {
381: if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
382: qemu_co_rwlock_unlock(&s->rename_lock);
383: }
384: }
385:
386: static inline uint8_t v9fs_request_cancelled(V9fsPDU *pdu)
387: {
388: return pdu->cancelled;
389: }
390:
391: extern void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq);
392: extern void virtio_9p_set_fd_limit(void);
393: extern void v9fs_reclaim_fd(V9fsPDU *pdu);
394: extern void v9fs_path_init(V9fsPath *path);
395: extern void v9fs_path_free(V9fsPath *path);
396: extern void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs);
397: extern int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
398: const char *name, V9fsPath *path);
1.1.1.3 ! root 399:
! 400: #define pdu_marshal(pdu, offset, fmt, args...) \
! 401: v9fs_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, fmt, ##args)
! 402: #define pdu_unmarshal(pdu, offset, fmt, args...) \
! 403: v9fs_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset, 1, fmt, ##args)
! 404:
1.1 root 405: #endif
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