1c5c84d16SWarner Losh /* 2c5c84d16SWarner Losh * file related system call shims and definitions 3c5c84d16SWarner Losh * 4c5c84d16SWarner Losh * Copyright (c) 2013 Stacey D. Son 5c5c84d16SWarner Losh * 6c5c84d16SWarner Losh * This program is free software; you can redistribute it and/or modify 7c5c84d16SWarner Losh * it under the terms of the GNU General Public License as published by 8c5c84d16SWarner Losh * the Free Software Foundation; either version 2 of the License, or 9c5c84d16SWarner Losh * (at your option) any later version. 10c5c84d16SWarner Losh * 11c5c84d16SWarner Losh * This program is distributed in the hope that it will be useful, 12c5c84d16SWarner Losh * but WITHOUT ANY WARRANTY; without even the implied warranty of 13c5c84d16SWarner Losh * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14c5c84d16SWarner Losh * GNU General Public License for more details. 15c5c84d16SWarner Losh * 16c5c84d16SWarner Losh * You should have received a copy of the GNU General Public License 17c5c84d16SWarner Losh * along with this program; if not, see <http://www.gnu.org/licenses/>. 18c5c84d16SWarner Losh */ 19c5c84d16SWarner Losh 209c092804SMarkus Armbruster #ifndef BSD_FILE_H 219c092804SMarkus Armbruster #define BSD_FILE_H 22c5c84d16SWarner Losh 23c5c84d16SWarner Losh #include "qemu/path.h" 24c5c84d16SWarner Losh 2577d3522bSWarner Losh #define LOCK_PATH(p, arg) \ 2677d3522bSWarner Losh do { \ 2777d3522bSWarner Losh (p) = lock_user_string(arg); \ 2877d3522bSWarner Losh if ((p) == NULL) { \ 2977d3522bSWarner Losh return -TARGET_EFAULT; \ 3077d3522bSWarner Losh } \ 3177d3522bSWarner Losh } while (0) 3277d3522bSWarner Losh 3377d3522bSWarner Losh #define UNLOCK_PATH(p, arg) unlock_user(p, arg, 0) 3477d3522bSWarner Losh 3577d3522bSWarner Losh 36c5c84d16SWarner Losh extern struct iovec *lock_iovec(int type, abi_ulong target_addr, int count, 37c5c84d16SWarner Losh int copy); 38c5c84d16SWarner Losh extern void unlock_iovec(struct iovec *vec, abi_ulong target_addr, int count, 39c5c84d16SWarner Losh int copy); 40c5c84d16SWarner Losh 4177d3522bSWarner Losh int safe_open(const char *path, int flags, mode_t mode); 4277d3522bSWarner Losh int safe_openat(int fd, const char *path, int flags, mode_t mode); 4377d3522bSWarner Losh 4480da1b00SWarner Losh ssize_t safe_read(int fd, void *buf, size_t nbytes); 4580da1b00SWarner Losh ssize_t safe_pread(int fd, void *buf, size_t nbytes, off_t offset); 4680da1b00SWarner Losh ssize_t safe_readv(int fd, const struct iovec *iov, int iovcnt); 4780da1b00SWarner Losh ssize_t safe_preadv(int fd, const struct iovec *iov, int iovcnt, off_t offset); 4880da1b00SWarner Losh 49770d8abaSWarner Losh ssize_t safe_write(int fd, void *buf, size_t nbytes); 50770d8abaSWarner Losh ssize_t safe_pwrite(int fd, void *buf, size_t nbytes, off_t offset); 51770d8abaSWarner Losh ssize_t safe_writev(int fd, const struct iovec *iov, int iovcnt); 52770d8abaSWarner Losh ssize_t safe_pwritev(int fd, const struct iovec *iov, int iovcnt, off_t offset); 53770d8abaSWarner Losh 5480da1b00SWarner Losh /* read(2) */ 5580da1b00SWarner Losh static abi_long do_bsd_read(abi_long arg1, abi_long arg2, abi_long arg3) 5680da1b00SWarner Losh { 5780da1b00SWarner Losh abi_long ret; 5880da1b00SWarner Losh void *p; 5980da1b00SWarner Losh 6080da1b00SWarner Losh p = lock_user(VERIFY_WRITE, arg2, arg3, 0); 6180da1b00SWarner Losh if (p == NULL) { 6280da1b00SWarner Losh return -TARGET_EFAULT; 6380da1b00SWarner Losh } 6480da1b00SWarner Losh ret = get_errno(safe_read(arg1, p, arg3)); 6580da1b00SWarner Losh unlock_user(p, arg2, ret); 6680da1b00SWarner Losh 6780da1b00SWarner Losh return ret; 6880da1b00SWarner Losh } 6980da1b00SWarner Losh 7080da1b00SWarner Losh /* pread(2) */ 7180da1b00SWarner Losh static abi_long do_bsd_pread(void *cpu_env, abi_long arg1, 7280da1b00SWarner Losh abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) 7380da1b00SWarner Losh { 7480da1b00SWarner Losh abi_long ret; 7580da1b00SWarner Losh void *p; 7680da1b00SWarner Losh 7780da1b00SWarner Losh p = lock_user(VERIFY_WRITE, arg2, arg3, 0); 7880da1b00SWarner Losh if (p == NULL) { 7980da1b00SWarner Losh return -TARGET_EFAULT; 8080da1b00SWarner Losh } 8180da1b00SWarner Losh if (regpairs_aligned(cpu_env) != 0) { 8280da1b00SWarner Losh arg4 = arg5; 8380da1b00SWarner Losh arg5 = arg6; 8480da1b00SWarner Losh } 8580da1b00SWarner Losh ret = get_errno(safe_pread(arg1, p, arg3, target_arg64(arg4, arg5))); 8680da1b00SWarner Losh unlock_user(p, arg2, ret); 8780da1b00SWarner Losh 8880da1b00SWarner Losh return ret; 8980da1b00SWarner Losh } 9080da1b00SWarner Losh 9180da1b00SWarner Losh /* readv(2) */ 9280da1b00SWarner Losh static abi_long do_bsd_readv(abi_long arg1, abi_long arg2, abi_long arg3) 9380da1b00SWarner Losh { 9480da1b00SWarner Losh abi_long ret; 9580da1b00SWarner Losh struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 0); 9680da1b00SWarner Losh 9780da1b00SWarner Losh if (vec != NULL) { 9880da1b00SWarner Losh ret = get_errno(safe_readv(arg1, vec, arg3)); 9980da1b00SWarner Losh unlock_iovec(vec, arg2, arg3, 1); 10080da1b00SWarner Losh } else { 10180da1b00SWarner Losh ret = -host_to_target_errno(errno); 10280da1b00SWarner Losh } 10380da1b00SWarner Losh 10480da1b00SWarner Losh return ret; 10580da1b00SWarner Losh } 10680da1b00SWarner Losh 10780da1b00SWarner Losh /* preadv(2) */ 10880da1b00SWarner Losh static abi_long do_bsd_preadv(void *cpu_env, abi_long arg1, 10980da1b00SWarner Losh abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) 11080da1b00SWarner Losh { 11180da1b00SWarner Losh abi_long ret; 11280da1b00SWarner Losh struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 1); 11380da1b00SWarner Losh 11480da1b00SWarner Losh if (vec != NULL) { 11580da1b00SWarner Losh if (regpairs_aligned(cpu_env) != 0) { 11680da1b00SWarner Losh arg4 = arg5; 11780da1b00SWarner Losh arg5 = arg6; 11880da1b00SWarner Losh } 11980da1b00SWarner Losh ret = get_errno(safe_preadv(arg1, vec, arg3, target_arg64(arg4, arg5))); 12080da1b00SWarner Losh unlock_iovec(vec, arg2, arg3, 0); 12180da1b00SWarner Losh } else { 12280da1b00SWarner Losh ret = -host_to_target_errno(errno); 12380da1b00SWarner Losh } 12480da1b00SWarner Losh 12580da1b00SWarner Losh return ret; 12680da1b00SWarner Losh } 12780da1b00SWarner Losh 128770d8abaSWarner Losh /* write(2) */ 129770d8abaSWarner Losh static abi_long do_bsd_write(abi_long arg1, abi_long arg2, abi_long arg3) 130770d8abaSWarner Losh { 131770d8abaSWarner Losh abi_long nbytes, ret; 132770d8abaSWarner Losh void *p; 133770d8abaSWarner Losh 134770d8abaSWarner Losh /* nbytes < 0 implies that it was larger than SIZE_MAX. */ 135770d8abaSWarner Losh nbytes = arg3; 136770d8abaSWarner Losh if (nbytes < 0) { 137770d8abaSWarner Losh return -TARGET_EINVAL; 138770d8abaSWarner Losh } 139770d8abaSWarner Losh p = lock_user(VERIFY_READ, arg2, nbytes, 1); 140770d8abaSWarner Losh if (p == NULL) { 141770d8abaSWarner Losh return -TARGET_EFAULT; 142770d8abaSWarner Losh } 143770d8abaSWarner Losh ret = get_errno(safe_write(arg1, p, arg3)); 144770d8abaSWarner Losh unlock_user(p, arg2, 0); 145770d8abaSWarner Losh 146770d8abaSWarner Losh return ret; 147770d8abaSWarner Losh } 148770d8abaSWarner Losh 149770d8abaSWarner Losh /* pwrite(2) */ 150770d8abaSWarner Losh static abi_long do_bsd_pwrite(void *cpu_env, abi_long arg1, 151770d8abaSWarner Losh abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) 152770d8abaSWarner Losh { 153770d8abaSWarner Losh abi_long ret; 154770d8abaSWarner Losh void *p; 155770d8abaSWarner Losh 156770d8abaSWarner Losh p = lock_user(VERIFY_READ, arg2, arg3, 1); 157770d8abaSWarner Losh if (p == NULL) { 158770d8abaSWarner Losh return -TARGET_EFAULT; 159770d8abaSWarner Losh } 160770d8abaSWarner Losh if (regpairs_aligned(cpu_env) != 0) { 161770d8abaSWarner Losh arg4 = arg5; 162770d8abaSWarner Losh arg5 = arg6; 163770d8abaSWarner Losh } 164770d8abaSWarner Losh ret = get_errno(safe_pwrite(arg1, p, arg3, target_arg64(arg4, arg5))); 165770d8abaSWarner Losh unlock_user(p, arg2, 0); 166770d8abaSWarner Losh 167770d8abaSWarner Losh return ret; 168770d8abaSWarner Losh } 169770d8abaSWarner Losh 170770d8abaSWarner Losh /* writev(2) */ 171770d8abaSWarner Losh static abi_long do_bsd_writev(abi_long arg1, abi_long arg2, abi_long arg3) 172770d8abaSWarner Losh { 173770d8abaSWarner Losh abi_long ret; 174770d8abaSWarner Losh struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1); 175770d8abaSWarner Losh 176770d8abaSWarner Losh if (vec != NULL) { 177770d8abaSWarner Losh ret = get_errno(safe_writev(arg1, vec, arg3)); 178770d8abaSWarner Losh unlock_iovec(vec, arg2, arg3, 0); 179770d8abaSWarner Losh } else { 180770d8abaSWarner Losh ret = -host_to_target_errno(errno); 181770d8abaSWarner Losh } 182770d8abaSWarner Losh 183770d8abaSWarner Losh return ret; 184770d8abaSWarner Losh } 185770d8abaSWarner Losh 186770d8abaSWarner Losh /* pwritev(2) */ 187770d8abaSWarner Losh static abi_long do_bsd_pwritev(void *cpu_env, abi_long arg1, 188770d8abaSWarner Losh abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) 189770d8abaSWarner Losh { 190770d8abaSWarner Losh abi_long ret; 191770d8abaSWarner Losh struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1); 192770d8abaSWarner Losh 193770d8abaSWarner Losh if (vec != NULL) { 194770d8abaSWarner Losh if (regpairs_aligned(cpu_env) != 0) { 195770d8abaSWarner Losh arg4 = arg5; 196770d8abaSWarner Losh arg5 = arg6; 197770d8abaSWarner Losh } 198770d8abaSWarner Losh ret = get_errno(safe_pwritev(arg1, vec, arg3, target_arg64(arg4, arg5))); 199770d8abaSWarner Losh unlock_iovec(vec, arg2, arg3, 0); 200770d8abaSWarner Losh } else { 201770d8abaSWarner Losh ret = -host_to_target_errno(errno); 202770d8abaSWarner Losh } 203770d8abaSWarner Losh 204770d8abaSWarner Losh return ret; 205770d8abaSWarner Losh } 206770d8abaSWarner Losh 20777d3522bSWarner Losh /* open(2) */ 20877d3522bSWarner Losh static abi_long do_bsd_open(abi_long arg1, abi_long arg2, abi_long arg3) 20977d3522bSWarner Losh { 21077d3522bSWarner Losh abi_long ret; 21177d3522bSWarner Losh void *p; 21277d3522bSWarner Losh 21377d3522bSWarner Losh LOCK_PATH(p, arg1); 21477d3522bSWarner Losh ret = get_errno(safe_open(path(p), target_to_host_bitmask(arg2, 21577d3522bSWarner Losh fcntl_flags_tbl), arg3)); 21677d3522bSWarner Losh UNLOCK_PATH(p, arg1); 21777d3522bSWarner Losh 21877d3522bSWarner Losh return ret; 21977d3522bSWarner Losh } 22077d3522bSWarner Losh 22177d3522bSWarner Losh /* openat(2) */ 22277d3522bSWarner Losh static abi_long do_bsd_openat(abi_long arg1, abi_long arg2, 22377d3522bSWarner Losh abi_long arg3, abi_long arg4) 22477d3522bSWarner Losh { 22577d3522bSWarner Losh abi_long ret; 22677d3522bSWarner Losh void *p; 22777d3522bSWarner Losh 22877d3522bSWarner Losh LOCK_PATH(p, arg2); 22977d3522bSWarner Losh ret = get_errno(safe_openat(arg1, path(p), 23077d3522bSWarner Losh target_to_host_bitmask(arg3, fcntl_flags_tbl), arg4)); 23177d3522bSWarner Losh UNLOCK_PATH(p, arg2); 23277d3522bSWarner Losh 23377d3522bSWarner Losh return ret; 23477d3522bSWarner Losh } 23577d3522bSWarner Losh 23677d3522bSWarner Losh /* close(2) */ 23777d3522bSWarner Losh static inline abi_long do_bsd_close(abi_long arg1) 23877d3522bSWarner Losh { 23977d3522bSWarner Losh return get_errno(close(arg1)); 24077d3522bSWarner Losh } 24177d3522bSWarner Losh 242a2ba6c7bSWarner Losh /* fdatasync(2) */ 243a2ba6c7bSWarner Losh static abi_long do_bsd_fdatasync(abi_long arg1) 244a2ba6c7bSWarner Losh { 245a2ba6c7bSWarner Losh return get_errno(fdatasync(arg1)); 246a2ba6c7bSWarner Losh } 247a2ba6c7bSWarner Losh 248a2ba6c7bSWarner Losh /* fsync(2) */ 249a2ba6c7bSWarner Losh static abi_long do_bsd_fsync(abi_long arg1) 250a2ba6c7bSWarner Losh { 251a2ba6c7bSWarner Losh return get_errno(fsync(arg1)); 252a2ba6c7bSWarner Losh } 253a2ba6c7bSWarner Losh 254a2ba6c7bSWarner Losh /* closefrom(2) */ 255a2ba6c7bSWarner Losh static abi_long do_bsd_closefrom(abi_long arg1) 256a2ba6c7bSWarner Losh { 257a2ba6c7bSWarner Losh closefrom(arg1); /* returns void */ 258a2ba6c7bSWarner Losh return get_errno(0); 259a2ba6c7bSWarner Losh } 260a2ba6c7bSWarner Losh 261*65c6c4c8SWarner Losh /* revoke(2) */ 262*65c6c4c8SWarner Losh static abi_long do_bsd_revoke(abi_long arg1) 263*65c6c4c8SWarner Losh { 264*65c6c4c8SWarner Losh abi_long ret; 265*65c6c4c8SWarner Losh void *p; 266*65c6c4c8SWarner Losh 267*65c6c4c8SWarner Losh LOCK_PATH(p, arg1); 268*65c6c4c8SWarner Losh ret = get_errno(revoke(p)); /* XXX path(p)? */ 269*65c6c4c8SWarner Losh UNLOCK_PATH(p, arg1); 270*65c6c4c8SWarner Losh 271*65c6c4c8SWarner Losh return ret; 272*65c6c4c8SWarner Losh } 273*65c6c4c8SWarner Losh 274*65c6c4c8SWarner Losh /* access(2) */ 275*65c6c4c8SWarner Losh static abi_long do_bsd_access(abi_long arg1, abi_long arg2) 276*65c6c4c8SWarner Losh { 277*65c6c4c8SWarner Losh abi_long ret; 278*65c6c4c8SWarner Losh void *p; 279*65c6c4c8SWarner Losh 280*65c6c4c8SWarner Losh LOCK_PATH(p, arg1); 281*65c6c4c8SWarner Losh ret = get_errno(access(path(p), arg2)); 282*65c6c4c8SWarner Losh UNLOCK_PATH(p, arg1); 283*65c6c4c8SWarner Losh 284*65c6c4c8SWarner Losh return ret; 285*65c6c4c8SWarner Losh } 286*65c6c4c8SWarner Losh 287*65c6c4c8SWarner Losh /* eaccess(2) */ 288*65c6c4c8SWarner Losh static abi_long do_bsd_eaccess(abi_long arg1, abi_long arg2) 289*65c6c4c8SWarner Losh { 290*65c6c4c8SWarner Losh abi_long ret; 291*65c6c4c8SWarner Losh void *p; 292*65c6c4c8SWarner Losh 293*65c6c4c8SWarner Losh LOCK_PATH(p, arg1); 294*65c6c4c8SWarner Losh ret = get_errno(eaccess(path(p), arg2)); 295*65c6c4c8SWarner Losh UNLOCK_PATH(p, arg1); 296*65c6c4c8SWarner Losh 297*65c6c4c8SWarner Losh return ret; 298*65c6c4c8SWarner Losh } 299*65c6c4c8SWarner Losh 300*65c6c4c8SWarner Losh /* faccessat(2) */ 301*65c6c4c8SWarner Losh static abi_long do_bsd_faccessat(abi_long arg1, abi_long arg2, 302*65c6c4c8SWarner Losh abi_long arg3, abi_long arg4) 303*65c6c4c8SWarner Losh { 304*65c6c4c8SWarner Losh abi_long ret; 305*65c6c4c8SWarner Losh void *p; 306*65c6c4c8SWarner Losh 307*65c6c4c8SWarner Losh LOCK_PATH(p, arg2); 308*65c6c4c8SWarner Losh ret = get_errno(faccessat(arg1, p, arg3, arg4)); /* XXX path(p)? */ 309*65c6c4c8SWarner Losh UNLOCK_PATH(p, arg2); 310*65c6c4c8SWarner Losh 311*65c6c4c8SWarner Losh return ret; 312*65c6c4c8SWarner Losh } 313*65c6c4c8SWarner Losh 3149c092804SMarkus Armbruster #endif /* BSD_FILE_H */ 315