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 15 enum { 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 /* qid.types */ 88 enum { 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 }; 99 100 enum 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 111 static inline char *rpath(FsContext *ctx, const char *path) 112 { 113 return g_strdup_printf("%s/%s", ctx->fs_root, path); 114 } 115 116 /* 117 * ample room for Twrite/Rread header 118 * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4] 119 */ 120 #define P9_IOHDRSZ 24 121 122 typedef struct V9fsPDU V9fsPDU; 123 struct V9fsState; 124 125 struct 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 /* FIXME 139 * 1) change user needs to set groups and stuff 140 */ 141 142 #define MAX_REQ 128 143 #define MAX_TAG_LEN 32 144 145 #define BUG_ON(cond) assert(!(cond)) 146 147 typedef struct V9fsFidState V9fsFidState; 148 149 enum { 150 P9_FID_NONE = 0, 151 P9_FID_FILE, 152 P9_FID_DIR, 153 P9_FID_XATTR, 154 }; 155 156 typedef struct V9fsConf 157 { 158 /* tag name for the device */ 159 char *tag; 160 char *fsdev_id; 161 } V9fsConf; 162 163 typedef 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 * Filled by fs driver on open and other 174 * calls. 175 */ 176 union V9fsFidOpenState { 177 int fd; 178 DIR *dir; 179 V9fsXattr xattr; 180 /* 181 * private pointer for fs drivers, that 182 * have its own internal representation of 183 * open files. 184 */ 185 void *private; 186 }; 187 188 struct 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 }; 203 204 typedef 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 * lock ensuring atomic path update 216 * on rename. 217 */ 218 CoRwlock rename_lock; 219 int32_t root_fid; 220 Error *migration_blocker; 221 V9fsConf fsconf; 222 } V9fsState; 223 224 /* 9p2000.L open flags */ 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 /* 9p2000.L at flags */ 246 #define P9_DOTL_AT_REMOVEDIR 0x200 247 248 /* 9P2000.L lock type */ 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 2 260 261 typedef struct V9fsFlock 262 { 263 uint8_t type; 264 uint32_t flags; 265 uint64_t start; /* absolute offset */ 266 uint64_t length; 267 uint32_t proc_id; 268 V9fsString client_id; 269 } V9fsFlock; 270 271 typedef struct V9fsGetlock 272 { 273 uint8_t type; 274 uint64_t start; /* absolute offset */ 275 uint64_t length; 276 uint32_t proc_id; 277 V9fsString client_id; 278 } V9fsGetlock; 279 280 extern int open_fd_hw; 281 extern int total_open_fd; 282 283 static 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 } 289 290 static 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 } 296 297 static 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 } 303 304 static inline uint8_t v9fs_request_cancelled(V9fsPDU *pdu) 305 { 306 return pdu->cancelled; 307 } 308 309 extern void v9fs_reclaim_fd(V9fsPDU *pdu); 310 extern void v9fs_path_init(V9fsPath *path); 311 extern void v9fs_path_free(V9fsPath *path); 312 extern void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs); 313 extern int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, 314 const char *name, V9fsPath *path); 315 extern int v9fs_device_realize_common(V9fsState *s, Error **errp); 316 extern void v9fs_device_unrealize_common(V9fsState *s, Error **errp); 317 318 ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...); 319 ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...); 320 V9fsPDU *pdu_alloc(V9fsState *s); 321 void pdu_free(V9fsPDU *pdu); 322 void pdu_submit(V9fsPDU *pdu); 323 324 #endif 325