1 #ifndef _QEMU_VIRTIO_9P_H
2 #define _QEMU_VIRTIO_9P_H
8 #include <sys/resource.h>
10 #include "fsdev/file-op-9p.h"
12 /* The feature bitmap for virtio 9P */
13 /* The mount point is specified in a config variable */
14 #define VIRTIO_9P_MOUNT_TAG 0
97 enum p9_proto_version {
98 V9FS_PROTO_2000U = 0x01,
99 V9FS_PROTO_2000L = 0x02,
102 #define P9_NOTAG (u16)(~0)
103 #define P9_NOFID (u32)(~0)
104 #define P9_MAXWELEM 16
106 #define FID_REFERENCED 0x1
107 #define FID_NON_RECLAIMABLE 0x2
108 static inline const char *rpath(FsContext *ctx, const char *path, char *buffer)
110 snprintf(buffer, PATH_MAX, "%s/%s", ctx->fs_root, path);
115 * ample room for Twrite/Rread header
116 * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4]
118 #define P9_IOHDRSZ 24
120 typedef struct V9fsPDU V9fsPDU;
128 VirtQueueElement elem;
130 QLIST_ENTRY(V9fsPDU) next;
135 * 1) change user needs to set groups and stuff
138 /* from Linux's linux/virtio_9p.h */
140 /* The ID for virtio console */
141 #define VIRTIO_ID_9P 9
143 #define MAX_TAG_LEN 32
145 #define BUG_ON(cond) assert(!(cond))
147 typedef struct V9fsFidState V9fsFidState;
149 typedef struct V9fsString
155 typedef struct V9fsQID
162 typedef struct V9fsStat
177 V9fsString extension;
190 typedef struct V9fsXattr
219 V9fsFidState *rclm_lst;
222 typedef struct V9fsState
226 V9fsPDU pdus[MAX_REQ];
227 QLIST_HEAD(, V9fsPDU) free_list;
228 V9fsFidState *fid_list;
234 enum p9_proto_version proto_version;
238 typedef struct V9fsStatState {
246 typedef struct V9fsStatDotl {
247 uint64_t st_result_mask;
257 uint64_t st_atime_sec;
258 uint64_t st_atime_nsec;
259 uint64_t st_mtime_sec;
260 uint64_t st_mtime_nsec;
261 uint64_t st_ctime_sec;
262 uint64_t st_ctime_nsec;
263 uint64_t st_btime_sec;
264 uint64_t st_btime_nsec;
266 uint64_t st_data_version;
269 typedef struct V9fsOpenState {
279 typedef struct V9fsReadState {
286 struct iovec iov[128]; /* FIXME: bad, bad, bad */
298 typedef struct V9fsWriteState {
306 struct iovec iov[128]; /* FIXME: bad, bad, bad */
311 typedef struct V9fsIattr
324 struct virtio_9p_config
326 /* number of characters in tag */
328 /* Variable size tag name */
332 typedef struct V9fsMkState {
341 #define P9_LOCK_SUCCESS 0
342 #define P9_LOCK_BLOCKED 1
343 #define P9_LOCK_ERROR 2
344 #define P9_LOCK_GRACE 3
346 #define P9_LOCK_FLAGS_BLOCK 1
347 #define P9_LOCK_FLAGS_RECLAIM 2
349 typedef struct V9fsFlock
353 uint64_t start; /* absolute offset */
356 V9fsString client_id;
359 typedef struct V9fsGetlock
362 uint64_t start; /* absolute offset */
365 V9fsString client_id;
368 extern int open_fd_hw;
369 extern int total_open_fd;
371 size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
372 size_t offset, size_t size, int pack);
374 static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
375 size_t offset, size_t size)
377 return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
380 extern void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq);
381 extern void virtio_9p_set_fd_limit(void);
382 extern void v9fs_reclaim_fd(V9fsState *s);