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