M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1 | /* |
Wei Liu | 494a8eb | 2015-11-18 18:21:14 +0000 | [diff] [blame] | 2 | * 9p Proxy callback |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 3 | * |
| 4 | * Copyright IBM, Corp. 2011 |
| 5 | * |
| 6 | * Authors: |
| 7 | * M. Mohan Kumar <mohan@in.ibm.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 10 | * the COPYING file in the top-level directory. |
| 11 | */ |
Markus Armbruster | e688df6 | 2018-02-01 12:18:31 +0100 | [diff] [blame] | 12 | |
Peter Maydell | fbc0412 | 2016-01-26 18:17:10 +0000 | [diff] [blame] | 13 | #include "qemu/osdep.h" |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 14 | #include <sys/socket.h> |
| 15 | #include <sys/un.h> |
Wei Liu | ebe74f8 | 2016-01-07 18:18:02 +0000 | [diff] [blame] | 16 | #include "9p.h" |
Markus Armbruster | e688df6 | 2018-02-01 12:18:31 +0100 | [diff] [blame] | 17 | #include "qapi/error.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 18 | #include "qemu/cutils.h" |
Paolo Bonzini | b4a42f8 | 2013-02-04 11:37:52 +0100 | [diff] [blame] | 19 | #include "qemu/error-report.h" |
Markus Armbruster | 922a01a | 2018-02-01 12:18:46 +0100 | [diff] [blame] | 20 | #include "qemu/option.h" |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 21 | #include "fsdev/qemu-fsdev.h" |
Wei Liu | 494a8eb | 2015-11-18 18:21:14 +0000 | [diff] [blame] | 22 | #include "9p-proxy.h" |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 23 | |
| 24 | typedef struct V9fsProxy { |
| 25 | int sockfd; |
| 26 | QemuMutex mutex; |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 27 | struct iovec in_iovec; |
| 28 | struct iovec out_iovec; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 29 | } V9fsProxy; |
| 30 | |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 31 | /* |
| 32 | * Return received file descriptor on success in *status. |
| 33 | * errno is also returned on *status (which will be < 0) |
| 34 | * return < 0 on transport error. |
| 35 | */ |
| 36 | static int v9fs_receivefd(int sockfd, int *status) |
| 37 | { |
| 38 | struct iovec iov; |
| 39 | struct msghdr msg; |
| 40 | struct cmsghdr *cmsg; |
| 41 | int retval, data, fd; |
| 42 | union MsgControl msg_control; |
| 43 | |
| 44 | iov.iov_base = &data; |
| 45 | iov.iov_len = sizeof(data); |
| 46 | |
| 47 | memset(&msg, 0, sizeof(msg)); |
| 48 | msg.msg_iov = &iov; |
| 49 | msg.msg_iovlen = 1; |
| 50 | msg.msg_control = &msg_control; |
| 51 | msg.msg_controllen = sizeof(msg_control); |
| 52 | |
| 53 | do { |
| 54 | retval = recvmsg(sockfd, &msg, 0); |
| 55 | } while (retval < 0 && errno == EINTR); |
| 56 | if (retval <= 0) { |
| 57 | return retval; |
| 58 | } |
| 59 | /* |
| 60 | * data is set to V9FS_FD_VALID, if ancillary data is sent. If this |
| 61 | * request doesn't need ancillary data (fd) or an error occurred, |
| 62 | * data is set to negative errno value. |
| 63 | */ |
| 64 | if (data != V9FS_FD_VALID) { |
| 65 | *status = data; |
| 66 | return 0; |
| 67 | } |
| 68 | /* |
| 69 | * File descriptor (fd) is sent in the ancillary data. Check if we |
| 70 | * indeed received it. One of the reasons to fail to receive it is if |
| 71 | * we exceeded the maximum number of file descriptors! |
| 72 | */ |
| 73 | for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) { |
| 74 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) || |
| 75 | cmsg->cmsg_level != SOL_SOCKET || |
| 76 | cmsg->cmsg_type != SCM_RIGHTS) { |
| 77 | continue; |
| 78 | } |
| 79 | fd = *((int *)CMSG_DATA(cmsg)); |
| 80 | *status = fd; |
| 81 | return 0; |
| 82 | } |
| 83 | *status = -ENFILE; /* Ancillary data sent but not received */ |
| 84 | return 0; |
| 85 | } |
| 86 | |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 87 | static ssize_t socket_read(int sockfd, void *buff, size_t size) |
| 88 | { |
| 89 | ssize_t retval, total = 0; |
| 90 | |
| 91 | while (size) { |
| 92 | retval = read(sockfd, buff, size); |
| 93 | if (retval == 0) { |
| 94 | return -EIO; |
| 95 | } |
| 96 | if (retval < 0) { |
| 97 | if (errno == EINTR) { |
| 98 | continue; |
| 99 | } |
| 100 | return -errno; |
| 101 | } |
| 102 | size -= retval; |
| 103 | buff += retval; |
| 104 | total += retval; |
| 105 | } |
| 106 | return total; |
| 107 | } |
| 108 | |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 109 | /* Converts proxy_statfs to VFS statfs structure */ |
| 110 | static void prstatfs_to_statfs(struct statfs *stfs, ProxyStatFS *prstfs) |
| 111 | { |
| 112 | memset(stfs, 0, sizeof(*stfs)); |
| 113 | stfs->f_type = prstfs->f_type; |
| 114 | stfs->f_bsize = prstfs->f_bsize; |
| 115 | stfs->f_blocks = prstfs->f_blocks; |
| 116 | stfs->f_bfree = prstfs->f_bfree; |
| 117 | stfs->f_bavail = prstfs->f_bavail; |
| 118 | stfs->f_files = prstfs->f_files; |
| 119 | stfs->f_ffree = prstfs->f_ffree; |
Peter Maydell | 2afee49 | 2012-01-06 18:47:21 +0000 | [diff] [blame] | 120 | stfs->f_fsid.__val[0] = prstfs->f_fsid[0] & 0xFFFFFFFFU; |
| 121 | stfs->f_fsid.__val[1] = prstfs->f_fsid[1] >> 32 & 0xFFFFFFFFU; |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 122 | stfs->f_namelen = prstfs->f_namelen; |
| 123 | stfs->f_frsize = prstfs->f_frsize; |
| 124 | } |
| 125 | |
| 126 | /* Converts proxy_stat structure to VFS stat structure */ |
| 127 | static void prstat_to_stat(struct stat *stbuf, ProxyStat *prstat) |
| 128 | { |
| 129 | memset(stbuf, 0, sizeof(*stbuf)); |
| 130 | stbuf->st_dev = prstat->st_dev; |
| 131 | stbuf->st_ino = prstat->st_ino; |
| 132 | stbuf->st_nlink = prstat->st_nlink; |
| 133 | stbuf->st_mode = prstat->st_mode; |
| 134 | stbuf->st_uid = prstat->st_uid; |
| 135 | stbuf->st_gid = prstat->st_gid; |
| 136 | stbuf->st_rdev = prstat->st_rdev; |
| 137 | stbuf->st_size = prstat->st_size; |
| 138 | stbuf->st_blksize = prstat->st_blksize; |
| 139 | stbuf->st_blocks = prstat->st_blocks; |
| 140 | stbuf->st_atim.tv_sec = prstat->st_atim_sec; |
| 141 | stbuf->st_atim.tv_nsec = prstat->st_atim_nsec; |
| 142 | stbuf->st_mtime = prstat->st_mtim_sec; |
| 143 | stbuf->st_mtim.tv_nsec = prstat->st_mtim_nsec; |
| 144 | stbuf->st_ctime = prstat->st_ctim_sec; |
| 145 | stbuf->st_ctim.tv_nsec = prstat->st_ctim_nsec; |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * Response contains two parts |
| 150 | * {header, data} |
| 151 | * header.type == T_ERROR, data -> -errno |
| 152 | * header.type == T_SUCCESS, data -> response |
| 153 | * size of errno/response is given by header.size |
| 154 | * returns < 0, on transport error. response is |
| 155 | * valid only if status >= 0. |
| 156 | */ |
| 157 | static int v9fs_receive_response(V9fsProxy *proxy, int type, |
| 158 | int *status, void *response) |
| 159 | { |
| 160 | int retval; |
| 161 | ProxyHeader header; |
| 162 | struct iovec *reply = &proxy->in_iovec; |
| 163 | |
| 164 | *status = 0; |
| 165 | reply->iov_len = 0; |
| 166 | retval = socket_read(proxy->sockfd, reply->iov_base, PROXY_HDR_SZ); |
| 167 | if (retval < 0) { |
| 168 | return retval; |
| 169 | } |
| 170 | reply->iov_len = PROXY_HDR_SZ; |
Greg Kurz | 262169a | 2017-03-21 09:12:47 +0100 | [diff] [blame] | 171 | retval = proxy_unmarshal(reply, 0, "dd", &header.type, &header.size); |
| 172 | assert(retval == 4 * 2); |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 173 | /* |
| 174 | * if response size > PROXY_MAX_IO_SZ, read the response but ignore it and |
| 175 | * return -ENOBUFS |
| 176 | */ |
| 177 | if (header.size > PROXY_MAX_IO_SZ) { |
| 178 | int count; |
| 179 | while (header.size > 0) { |
| 180 | count = MIN(PROXY_MAX_IO_SZ, header.size); |
| 181 | count = socket_read(proxy->sockfd, reply->iov_base, count); |
| 182 | if (count < 0) { |
| 183 | return count; |
| 184 | } |
| 185 | header.size -= count; |
| 186 | } |
| 187 | *status = -ENOBUFS; |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | retval = socket_read(proxy->sockfd, |
| 192 | reply->iov_base + PROXY_HDR_SZ, header.size); |
| 193 | if (retval < 0) { |
| 194 | return retval; |
| 195 | } |
| 196 | reply->iov_len += header.size; |
| 197 | /* there was an error during processing request */ |
| 198 | if (header.type == T_ERROR) { |
| 199 | int ret; |
| 200 | ret = proxy_unmarshal(reply, PROXY_HDR_SZ, "d", status); |
Greg Kurz | 262169a | 2017-03-21 09:12:47 +0100 | [diff] [blame] | 201 | assert(ret == 4); |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | switch (type) { |
| 206 | case T_LSTAT: { |
| 207 | ProxyStat prstat; |
| 208 | retval = proxy_unmarshal(reply, PROXY_HDR_SZ, |
| 209 | "qqqdddqqqqqqqqqq", &prstat.st_dev, |
| 210 | &prstat.st_ino, &prstat.st_nlink, |
| 211 | &prstat.st_mode, &prstat.st_uid, |
| 212 | &prstat.st_gid, &prstat.st_rdev, |
| 213 | &prstat.st_size, &prstat.st_blksize, |
| 214 | &prstat.st_blocks, |
| 215 | &prstat.st_atim_sec, &prstat.st_atim_nsec, |
| 216 | &prstat.st_mtim_sec, &prstat.st_mtim_nsec, |
| 217 | &prstat.st_ctim_sec, &prstat.st_ctim_nsec); |
Greg Kurz | 262169a | 2017-03-21 09:12:47 +0100 | [diff] [blame] | 218 | assert(retval == 8 * 3 + 4 * 3 + 8 * 10); |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 219 | prstat_to_stat(response, &prstat); |
| 220 | break; |
| 221 | } |
| 222 | case T_STATFS: { |
| 223 | ProxyStatFS prstfs; |
| 224 | retval = proxy_unmarshal(reply, PROXY_HDR_SZ, |
| 225 | "qqqqqqqqqqq", &prstfs.f_type, |
| 226 | &prstfs.f_bsize, &prstfs.f_blocks, |
| 227 | &prstfs.f_bfree, &prstfs.f_bavail, |
| 228 | &prstfs.f_files, &prstfs.f_ffree, |
| 229 | &prstfs.f_fsid[0], &prstfs.f_fsid[1], |
| 230 | &prstfs.f_namelen, &prstfs.f_frsize); |
Greg Kurz | 262169a | 2017-03-21 09:12:47 +0100 | [diff] [blame] | 231 | assert(retval == 8 * 11); |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 232 | prstatfs_to_statfs(response, &prstfs); |
| 233 | break; |
| 234 | } |
| 235 | case T_READLINK: { |
| 236 | V9fsString target; |
| 237 | v9fs_string_init(&target); |
| 238 | retval = proxy_unmarshal(reply, PROXY_HDR_SZ, "s", &target); |
| 239 | strcpy(response, target.data); |
| 240 | v9fs_string_free(&target); |
| 241 | break; |
| 242 | } |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 243 | case T_LGETXATTR: |
| 244 | case T_LLISTXATTR: { |
| 245 | V9fsString xattr; |
| 246 | v9fs_string_init(&xattr); |
| 247 | retval = proxy_unmarshal(reply, PROXY_HDR_SZ, "s", &xattr); |
| 248 | memcpy(response, xattr.data, xattr.size); |
| 249 | v9fs_string_free(&xattr); |
| 250 | break; |
| 251 | } |
M. Mohan Kumar | d090e45 | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 252 | case T_GETVERSION: |
Greg Kurz | 262169a | 2017-03-21 09:12:47 +0100 | [diff] [blame] | 253 | retval = proxy_unmarshal(reply, PROXY_HDR_SZ, "q", response); |
| 254 | assert(retval == 8); |
M. Mohan Kumar | d090e45 | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 255 | break; |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 256 | default: |
| 257 | return -1; |
| 258 | } |
| 259 | if (retval < 0) { |
| 260 | *status = retval; |
| 261 | } |
| 262 | return 0; |
| 263 | } |
| 264 | |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 265 | /* |
| 266 | * return < 0 on transport error. |
| 267 | * *status is valid only if return >= 0 |
| 268 | */ |
| 269 | static int v9fs_receive_status(V9fsProxy *proxy, |
| 270 | struct iovec *reply, int *status) |
| 271 | { |
| 272 | int retval; |
| 273 | ProxyHeader header; |
| 274 | |
| 275 | *status = 0; |
| 276 | reply->iov_len = 0; |
| 277 | retval = socket_read(proxy->sockfd, reply->iov_base, PROXY_HDR_SZ); |
| 278 | if (retval < 0) { |
| 279 | return retval; |
| 280 | } |
| 281 | reply->iov_len = PROXY_HDR_SZ; |
Greg Kurz | 262169a | 2017-03-21 09:12:47 +0100 | [diff] [blame] | 282 | retval = proxy_unmarshal(reply, 0, "dd", &header.type, &header.size); |
| 283 | assert(retval == 4 * 2); |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 284 | retval = socket_read(proxy->sockfd, |
| 285 | reply->iov_base + PROXY_HDR_SZ, header.size); |
| 286 | if (retval < 0) { |
| 287 | return retval; |
| 288 | } |
| 289 | reply->iov_len += header.size; |
Greg Kurz | 262169a | 2017-03-21 09:12:47 +0100 | [diff] [blame] | 290 | retval = proxy_unmarshal(reply, PROXY_HDR_SZ, "d", status); |
| 291 | assert(retval == 4); |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 292 | return 0; |
| 293 | } |
| 294 | |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 295 | /* |
| 296 | * Proxy->header and proxy->request written to socket by QEMU process. |
| 297 | * This request read by proxy helper process |
| 298 | * returns 0 on success and -errno on error |
| 299 | */ |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 300 | static int v9fs_request(V9fsProxy *proxy, int type, void *response, ...) |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 301 | { |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 302 | dev_t rdev; |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 303 | va_list ap; |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 304 | int size = 0; |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 305 | int retval = 0; |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 306 | uint64_t offset; |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 307 | ProxyHeader header = { 0, 0}; |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 308 | struct timespec spec[2]; |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 309 | int flags, mode, uid, gid; |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 310 | V9fsString *name, *value; |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 311 | V9fsString *path, *oldpath; |
| 312 | struct iovec *iovec = NULL, *reply = NULL; |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 313 | |
| 314 | qemu_mutex_lock(&proxy->mutex); |
| 315 | |
| 316 | if (proxy->sockfd == -1) { |
| 317 | retval = -EIO; |
| 318 | goto err_out; |
| 319 | } |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 320 | iovec = &proxy->out_iovec; |
| 321 | reply = &proxy->in_iovec; |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 322 | va_start(ap, response); |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 323 | switch (type) { |
| 324 | case T_OPEN: |
| 325 | path = va_arg(ap, V9fsString *); |
| 326 | flags = va_arg(ap, int); |
| 327 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sd", path, flags); |
| 328 | if (retval > 0) { |
| 329 | header.size = retval; |
| 330 | header.type = T_OPEN; |
| 331 | } |
| 332 | break; |
| 333 | case T_CREATE: |
| 334 | path = va_arg(ap, V9fsString *); |
| 335 | flags = va_arg(ap, int); |
| 336 | mode = va_arg(ap, int); |
| 337 | uid = va_arg(ap, int); |
| 338 | gid = va_arg(ap, int); |
| 339 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sdddd", path, |
| 340 | flags, mode, uid, gid); |
| 341 | if (retval > 0) { |
| 342 | header.size = retval; |
| 343 | header.type = T_CREATE; |
| 344 | } |
| 345 | break; |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 346 | case T_MKNOD: |
| 347 | path = va_arg(ap, V9fsString *); |
| 348 | mode = va_arg(ap, int); |
| 349 | rdev = va_arg(ap, long int); |
| 350 | uid = va_arg(ap, int); |
| 351 | gid = va_arg(ap, int); |
| 352 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ddsdq", |
| 353 | uid, gid, path, mode, rdev); |
| 354 | if (retval > 0) { |
| 355 | header.size = retval; |
| 356 | header.type = T_MKNOD; |
| 357 | } |
| 358 | break; |
| 359 | case T_MKDIR: |
| 360 | path = va_arg(ap, V9fsString *); |
| 361 | mode = va_arg(ap, int); |
| 362 | uid = va_arg(ap, int); |
| 363 | gid = va_arg(ap, int); |
| 364 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ddsd", |
| 365 | uid, gid, path, mode); |
| 366 | if (retval > 0) { |
| 367 | header.size = retval; |
| 368 | header.type = T_MKDIR; |
| 369 | } |
| 370 | break; |
| 371 | case T_SYMLINK: |
| 372 | oldpath = va_arg(ap, V9fsString *); |
| 373 | path = va_arg(ap, V9fsString *); |
| 374 | uid = va_arg(ap, int); |
| 375 | gid = va_arg(ap, int); |
| 376 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ddss", |
| 377 | uid, gid, oldpath, path); |
| 378 | if (retval > 0) { |
| 379 | header.size = retval; |
| 380 | header.type = T_SYMLINK; |
| 381 | } |
| 382 | break; |
| 383 | case T_LINK: |
| 384 | oldpath = va_arg(ap, V9fsString *); |
| 385 | path = va_arg(ap, V9fsString *); |
| 386 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ss", |
| 387 | oldpath, path); |
| 388 | if (retval > 0) { |
| 389 | header.size = retval; |
| 390 | header.type = T_LINK; |
| 391 | } |
| 392 | break; |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 393 | case T_LSTAT: |
| 394 | path = va_arg(ap, V9fsString *); |
| 395 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "s", path); |
| 396 | if (retval > 0) { |
| 397 | header.size = retval; |
| 398 | header.type = T_LSTAT; |
| 399 | } |
| 400 | break; |
| 401 | case T_READLINK: |
| 402 | path = va_arg(ap, V9fsString *); |
| 403 | size = va_arg(ap, int); |
| 404 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sd", path, size); |
| 405 | if (retval > 0) { |
| 406 | header.size = retval; |
| 407 | header.type = T_READLINK; |
| 408 | } |
| 409 | break; |
| 410 | case T_STATFS: |
| 411 | path = va_arg(ap, V9fsString *); |
| 412 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "s", path); |
| 413 | if (retval > 0) { |
| 414 | header.size = retval; |
| 415 | header.type = T_STATFS; |
| 416 | } |
| 417 | break; |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 418 | case T_CHMOD: |
| 419 | path = va_arg(ap, V9fsString *); |
| 420 | mode = va_arg(ap, int); |
| 421 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sd", path, mode); |
| 422 | if (retval > 0) { |
| 423 | header.size = retval; |
| 424 | header.type = T_CHMOD; |
| 425 | } |
| 426 | break; |
| 427 | case T_CHOWN: |
| 428 | path = va_arg(ap, V9fsString *); |
| 429 | uid = va_arg(ap, int); |
| 430 | gid = va_arg(ap, int); |
| 431 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sdd", path, uid, gid); |
| 432 | if (retval > 0) { |
| 433 | header.size = retval; |
| 434 | header.type = T_CHOWN; |
| 435 | } |
| 436 | break; |
| 437 | case T_TRUNCATE: |
| 438 | path = va_arg(ap, V9fsString *); |
| 439 | offset = va_arg(ap, uint64_t); |
| 440 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sq", path, offset); |
| 441 | if (retval > 0) { |
| 442 | header.size = retval; |
| 443 | header.type = T_TRUNCATE; |
| 444 | } |
| 445 | break; |
| 446 | case T_UTIME: |
| 447 | path = va_arg(ap, V9fsString *); |
| 448 | spec[0].tv_sec = va_arg(ap, long); |
| 449 | spec[0].tv_nsec = va_arg(ap, long); |
| 450 | spec[1].tv_sec = va_arg(ap, long); |
| 451 | spec[1].tv_nsec = va_arg(ap, long); |
| 452 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sqqqq", path, |
| 453 | spec[0].tv_sec, spec[1].tv_nsec, |
| 454 | spec[1].tv_sec, spec[1].tv_nsec); |
| 455 | if (retval > 0) { |
| 456 | header.size = retval; |
| 457 | header.type = T_UTIME; |
| 458 | } |
| 459 | break; |
| 460 | case T_RENAME: |
| 461 | oldpath = va_arg(ap, V9fsString *); |
| 462 | path = va_arg(ap, V9fsString *); |
| 463 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ss", oldpath, path); |
| 464 | if (retval > 0) { |
| 465 | header.size = retval; |
| 466 | header.type = T_RENAME; |
| 467 | } |
| 468 | break; |
| 469 | case T_REMOVE: |
| 470 | path = va_arg(ap, V9fsString *); |
| 471 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "s", path); |
| 472 | if (retval > 0) { |
| 473 | header.size = retval; |
| 474 | header.type = T_REMOVE; |
| 475 | } |
| 476 | break; |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 477 | case T_LGETXATTR: |
| 478 | size = va_arg(ap, int); |
| 479 | path = va_arg(ap, V9fsString *); |
| 480 | name = va_arg(ap, V9fsString *); |
| 481 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, |
| 482 | "dss", size, path, name); |
| 483 | if (retval > 0) { |
| 484 | header.size = retval; |
| 485 | header.type = T_LGETXATTR; |
| 486 | } |
| 487 | break; |
| 488 | case T_LLISTXATTR: |
| 489 | size = va_arg(ap, int); |
| 490 | path = va_arg(ap, V9fsString *); |
| 491 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ds", size, path); |
| 492 | if (retval > 0) { |
| 493 | header.size = retval; |
| 494 | header.type = T_LLISTXATTR; |
| 495 | } |
| 496 | break; |
| 497 | case T_LSETXATTR: |
| 498 | path = va_arg(ap, V9fsString *); |
| 499 | name = va_arg(ap, V9fsString *); |
| 500 | value = va_arg(ap, V9fsString *); |
| 501 | size = va_arg(ap, int); |
| 502 | flags = va_arg(ap, int); |
| 503 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sssdd", |
| 504 | path, name, value, size, flags); |
| 505 | if (retval > 0) { |
| 506 | header.size = retval; |
| 507 | header.type = T_LSETXATTR; |
| 508 | } |
| 509 | break; |
| 510 | case T_LREMOVEXATTR: |
| 511 | path = va_arg(ap, V9fsString *); |
| 512 | name = va_arg(ap, V9fsString *); |
| 513 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ss", path, name); |
| 514 | if (retval > 0) { |
| 515 | header.size = retval; |
| 516 | header.type = T_LREMOVEXATTR; |
| 517 | } |
| 518 | break; |
M. Mohan Kumar | d090e45 | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 519 | case T_GETVERSION: |
| 520 | path = va_arg(ap, V9fsString *); |
| 521 | retval = proxy_marshal(iovec, PROXY_HDR_SZ, "s", path); |
| 522 | if (retval > 0) { |
| 523 | header.size = retval; |
| 524 | header.type = T_GETVERSION; |
| 525 | } |
| 526 | break; |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 527 | default: |
Markus Armbruster | 312fd5f | 2013-02-08 21:22:16 +0100 | [diff] [blame] | 528 | error_report("Invalid type %d", type); |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 529 | retval = -EINVAL; |
| 530 | break; |
| 531 | } |
| 532 | va_end(ap); |
| 533 | |
| 534 | if (retval < 0) { |
| 535 | goto err_out; |
| 536 | } |
| 537 | |
| 538 | /* marshal the header details */ |
| 539 | proxy_marshal(iovec, 0, "dd", header.type, header.size); |
| 540 | header.size += PROXY_HDR_SZ; |
| 541 | |
| 542 | retval = qemu_write_full(proxy->sockfd, iovec->iov_base, header.size); |
| 543 | if (retval != header.size) { |
| 544 | goto close_error; |
| 545 | } |
| 546 | |
| 547 | switch (type) { |
| 548 | case T_OPEN: |
| 549 | case T_CREATE: |
| 550 | /* |
| 551 | * A file descriptor is returned as response for |
| 552 | * T_OPEN,T_CREATE on success |
| 553 | */ |
| 554 | if (v9fs_receivefd(proxy->sockfd, &retval) < 0) { |
| 555 | goto close_error; |
| 556 | } |
| 557 | break; |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 558 | case T_MKNOD: |
| 559 | case T_MKDIR: |
| 560 | case T_SYMLINK: |
| 561 | case T_LINK: |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 562 | case T_CHMOD: |
| 563 | case T_CHOWN: |
| 564 | case T_RENAME: |
| 565 | case T_TRUNCATE: |
| 566 | case T_UTIME: |
| 567 | case T_REMOVE: |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 568 | case T_LSETXATTR: |
| 569 | case T_LREMOVEXATTR: |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 570 | if (v9fs_receive_status(proxy, reply, &retval) < 0) { |
| 571 | goto close_error; |
| 572 | } |
| 573 | break; |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 574 | case T_LSTAT: |
| 575 | case T_READLINK: |
| 576 | case T_STATFS: |
M. Mohan Kumar | d090e45 | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 577 | case T_GETVERSION: |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 578 | if (v9fs_receive_response(proxy, type, &retval, response) < 0) { |
| 579 | goto close_error; |
| 580 | } |
| 581 | break; |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 582 | case T_LGETXATTR: |
| 583 | case T_LLISTXATTR: |
| 584 | if (!size) { |
| 585 | if (v9fs_receive_status(proxy, reply, &retval) < 0) { |
| 586 | goto close_error; |
| 587 | } |
| 588 | } else { |
| 589 | if (v9fs_receive_response(proxy, type, &retval, response) < 0) { |
| 590 | goto close_error; |
| 591 | } |
| 592 | } |
| 593 | break; |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 594 | } |
| 595 | |
| 596 | err_out: |
| 597 | qemu_mutex_unlock(&proxy->mutex); |
| 598 | return retval; |
| 599 | |
| 600 | close_error: |
| 601 | close(proxy->sockfd); |
| 602 | proxy->sockfd = -1; |
| 603 | qemu_mutex_unlock(&proxy->mutex); |
| 604 | return -EIO; |
| 605 | } |
| 606 | |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 607 | static int proxy_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf) |
| 608 | { |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 609 | int retval; |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 610 | retval = v9fs_request(fs_ctx->private, T_LSTAT, stbuf, fs_path); |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 611 | if (retval < 0) { |
| 612 | errno = -retval; |
| 613 | return -1; |
| 614 | } |
| 615 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 616 | } |
| 617 | |
| 618 | static ssize_t proxy_readlink(FsContext *fs_ctx, V9fsPath *fs_path, |
| 619 | char *buf, size_t bufsz) |
| 620 | { |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 621 | int retval; |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 622 | retval = v9fs_request(fs_ctx->private, T_READLINK, buf, fs_path, bufsz); |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 623 | if (retval < 0) { |
| 624 | errno = -retval; |
| 625 | return -1; |
| 626 | } |
| 627 | return strlen(buf); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 628 | } |
| 629 | |
| 630 | static int proxy_close(FsContext *ctx, V9fsFidOpenState *fs) |
| 631 | { |
| 632 | return close(fs->fd); |
| 633 | } |
| 634 | |
| 635 | static int proxy_closedir(FsContext *ctx, V9fsFidOpenState *fs) |
| 636 | { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 637 | return closedir(fs->dir.stream); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | static int proxy_open(FsContext *ctx, V9fsPath *fs_path, |
| 641 | int flags, V9fsFidOpenState *fs) |
| 642 | { |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 643 | fs->fd = v9fs_request(ctx->private, T_OPEN, NULL, fs_path, flags); |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 644 | if (fs->fd < 0) { |
| 645 | errno = -fs->fd; |
| 646 | fs->fd = -1; |
| 647 | } |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 648 | return fs->fd; |
| 649 | } |
| 650 | |
| 651 | static int proxy_opendir(FsContext *ctx, |
| 652 | V9fsPath *fs_path, V9fsFidOpenState *fs) |
| 653 | { |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 654 | int serrno, fd; |
| 655 | |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 656 | fs->dir.stream = NULL; |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 657 | fd = v9fs_request(ctx->private, T_OPEN, NULL, fs_path, O_DIRECTORY); |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 658 | if (fd < 0) { |
| 659 | errno = -fd; |
| 660 | return -1; |
| 661 | } |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 662 | fs->dir.stream = fdopendir(fd); |
| 663 | if (!fs->dir.stream) { |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 664 | serrno = errno; |
| 665 | close(fd); |
| 666 | errno = serrno; |
| 667 | return -1; |
| 668 | } |
| 669 | return 0; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | static void proxy_rewinddir(FsContext *ctx, V9fsFidOpenState *fs) |
| 673 | { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 674 | rewinddir(fs->dir.stream); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 675 | } |
| 676 | |
| 677 | static off_t proxy_telldir(FsContext *ctx, V9fsFidOpenState *fs) |
| 678 | { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 679 | return telldir(fs->dir.stream); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 680 | } |
| 681 | |
Greg Kurz | 635324e | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 682 | static struct dirent *proxy_readdir(FsContext *ctx, V9fsFidOpenState *fs) |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 683 | { |
Greg Kurz | 635324e | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 684 | return readdir(fs->dir.stream); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 685 | } |
| 686 | |
| 687 | static void proxy_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off) |
| 688 | { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 689 | seekdir(fs->dir.stream, off); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | static ssize_t proxy_preadv(FsContext *ctx, V9fsFidOpenState *fs, |
| 693 | const struct iovec *iov, |
| 694 | int iovcnt, off_t offset) |
| 695 | { |
Michael Tokarev | 7752efc | 2015-03-12 09:36:12 +0300 | [diff] [blame] | 696 | ssize_t ret; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 697 | #ifdef CONFIG_PREADV |
Michael Tokarev | 7752efc | 2015-03-12 09:36:12 +0300 | [diff] [blame] | 698 | ret = preadv(fs->fd, iov, iovcnt, offset); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 699 | #else |
Michael Tokarev | 7752efc | 2015-03-12 09:36:12 +0300 | [diff] [blame] | 700 | ret = lseek(fs->fd, offset, SEEK_SET); |
| 701 | if (ret >= 0) { |
| 702 | ret = readv(fs->fd, iov, iovcnt); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 703 | } |
| 704 | #endif |
Michael Tokarev | 7752efc | 2015-03-12 09:36:12 +0300 | [diff] [blame] | 705 | return ret; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 706 | } |
| 707 | |
| 708 | static ssize_t proxy_pwritev(FsContext *ctx, V9fsFidOpenState *fs, |
| 709 | const struct iovec *iov, |
| 710 | int iovcnt, off_t offset) |
| 711 | { |
| 712 | ssize_t ret; |
| 713 | |
| 714 | #ifdef CONFIG_PREADV |
| 715 | ret = pwritev(fs->fd, iov, iovcnt, offset); |
| 716 | #else |
Michael Tokarev | 7752efc | 2015-03-12 09:36:12 +0300 | [diff] [blame] | 717 | ret = lseek(fs->fd, offset, SEEK_SET); |
| 718 | if (ret >= 0) { |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 719 | ret = writev(fs->fd, iov, iovcnt); |
| 720 | } |
| 721 | #endif |
| 722 | #ifdef CONFIG_SYNC_FILE_RANGE |
| 723 | if (ret > 0 && ctx->export_flags & V9FS_IMMEDIATE_WRITEOUT) { |
| 724 | /* |
| 725 | * Initiate a writeback. This is not a data integrity sync. |
| 726 | * We want to ensure that we don't leave dirty pages in the cache |
| 727 | * after write when writeout=immediate is sepcified. |
| 728 | */ |
| 729 | sync_file_range(fs->fd, offset, ret, |
| 730 | SYNC_FILE_RANGE_WAIT_BEFORE | SYNC_FILE_RANGE_WRITE); |
| 731 | } |
| 732 | #endif |
| 733 | return ret; |
| 734 | } |
| 735 | |
| 736 | static int proxy_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
| 737 | { |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 738 | int retval; |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 739 | retval = v9fs_request(fs_ctx->private, T_CHMOD, NULL, fs_path, |
| 740 | credp->fc_mode); |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 741 | if (retval < 0) { |
| 742 | errno = -retval; |
| 743 | } |
| 744 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | static int proxy_mknod(FsContext *fs_ctx, V9fsPath *dir_path, |
| 748 | const char *name, FsCred *credp) |
| 749 | { |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 750 | int retval; |
| 751 | V9fsString fullname; |
| 752 | |
| 753 | v9fs_string_init(&fullname); |
| 754 | v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name); |
| 755 | |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 756 | retval = v9fs_request(fs_ctx->private, T_MKNOD, NULL, &fullname, |
| 757 | credp->fc_mode, credp->fc_rdev, |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 758 | credp->fc_uid, credp->fc_gid); |
| 759 | v9fs_string_free(&fullname); |
| 760 | if (retval < 0) { |
| 761 | errno = -retval; |
| 762 | retval = -1; |
| 763 | } |
| 764 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | static int proxy_mkdir(FsContext *fs_ctx, V9fsPath *dir_path, |
| 768 | const char *name, FsCred *credp) |
| 769 | { |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 770 | int retval; |
| 771 | V9fsString fullname; |
| 772 | |
| 773 | v9fs_string_init(&fullname); |
| 774 | v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name); |
| 775 | |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 776 | retval = v9fs_request(fs_ctx->private, T_MKDIR, NULL, &fullname, |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 777 | credp->fc_mode, credp->fc_uid, credp->fc_gid); |
| 778 | v9fs_string_free(&fullname); |
| 779 | if (retval < 0) { |
| 780 | errno = -retval; |
| 781 | retval = -1; |
| 782 | } |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 783 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 784 | } |
| 785 | |
| 786 | static int proxy_fstat(FsContext *fs_ctx, int fid_type, |
| 787 | V9fsFidOpenState *fs, struct stat *stbuf) |
| 788 | { |
| 789 | int fd; |
| 790 | |
| 791 | if (fid_type == P9_FID_DIR) { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 792 | fd = dirfd(fs->dir.stream); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 793 | } else { |
| 794 | fd = fs->fd; |
| 795 | } |
| 796 | return fstat(fd, stbuf); |
| 797 | } |
| 798 | |
| 799 | static int proxy_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name, |
| 800 | int flags, FsCred *credp, V9fsFidOpenState *fs) |
| 801 | { |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 802 | V9fsString fullname; |
| 803 | |
| 804 | v9fs_string_init(&fullname); |
| 805 | v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name); |
| 806 | |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 807 | fs->fd = v9fs_request(fs_ctx->private, T_CREATE, NULL, &fullname, flags, |
| 808 | credp->fc_mode, credp->fc_uid, credp->fc_gid); |
M. Mohan Kumar | daf0b9a | 2011-12-14 13:58:44 +0530 | [diff] [blame] | 809 | v9fs_string_free(&fullname); |
| 810 | if (fs->fd < 0) { |
| 811 | errno = -fs->fd; |
| 812 | fs->fd = -1; |
| 813 | } |
| 814 | return fs->fd; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 815 | } |
| 816 | |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 817 | static int proxy_symlink(FsContext *fs_ctx, const char *oldpath, |
| 818 | V9fsPath *dir_path, const char *name, FsCred *credp) |
| 819 | { |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 820 | int retval; |
| 821 | V9fsString fullname, target; |
| 822 | |
| 823 | v9fs_string_init(&fullname); |
| 824 | v9fs_string_init(&target); |
| 825 | |
| 826 | v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name); |
| 827 | v9fs_string_sprintf(&target, "%s", oldpath); |
| 828 | |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 829 | retval = v9fs_request(fs_ctx->private, T_SYMLINK, NULL, &target, &fullname, |
| 830 | credp->fc_uid, credp->fc_gid); |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 831 | v9fs_string_free(&fullname); |
| 832 | v9fs_string_free(&target); |
| 833 | if (retval < 0) { |
| 834 | errno = -retval; |
| 835 | retval = -1; |
| 836 | } |
| 837 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 838 | } |
| 839 | |
| 840 | static int proxy_link(FsContext *ctx, V9fsPath *oldpath, |
| 841 | V9fsPath *dirpath, const char *name) |
| 842 | { |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 843 | int retval; |
| 844 | V9fsString newpath; |
| 845 | |
| 846 | v9fs_string_init(&newpath); |
| 847 | v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name); |
| 848 | |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 849 | retval = v9fs_request(ctx->private, T_LINK, NULL, oldpath, &newpath); |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 850 | v9fs_string_free(&newpath); |
| 851 | if (retval < 0) { |
| 852 | errno = -retval; |
| 853 | retval = -1; |
| 854 | } |
| 855 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 856 | } |
| 857 | |
| 858 | static int proxy_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size) |
| 859 | { |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 860 | int retval; |
| 861 | |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 862 | retval = v9fs_request(ctx->private, T_TRUNCATE, NULL, fs_path, size); |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 863 | if (retval < 0) { |
| 864 | errno = -retval; |
| 865 | return -1; |
| 866 | } |
| 867 | return 0; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | static int proxy_rename(FsContext *ctx, const char *oldpath, |
| 871 | const char *newpath) |
| 872 | { |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 873 | int retval; |
| 874 | V9fsString oldname, newname; |
| 875 | |
| 876 | v9fs_string_init(&oldname); |
| 877 | v9fs_string_init(&newname); |
| 878 | |
| 879 | v9fs_string_sprintf(&oldname, "%s", oldpath); |
| 880 | v9fs_string_sprintf(&newname, "%s", newpath); |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 881 | retval = v9fs_request(ctx->private, T_RENAME, NULL, &oldname, &newname); |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 882 | v9fs_string_free(&oldname); |
| 883 | v9fs_string_free(&newname); |
| 884 | if (retval < 0) { |
| 885 | errno = -retval; |
| 886 | } |
| 887 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 888 | } |
| 889 | |
| 890 | static int proxy_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
| 891 | { |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 892 | int retval; |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 893 | retval = v9fs_request(fs_ctx->private, T_CHOWN, NULL, fs_path, |
| 894 | credp->fc_uid, credp->fc_gid); |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 895 | if (retval < 0) { |
| 896 | errno = -retval; |
| 897 | } |
| 898 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 899 | } |
| 900 | |
| 901 | static int proxy_utimensat(FsContext *s, V9fsPath *fs_path, |
| 902 | const struct timespec *buf) |
| 903 | { |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 904 | int retval; |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 905 | retval = v9fs_request(s->private, T_UTIME, NULL, fs_path, |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 906 | buf[0].tv_sec, buf[0].tv_nsec, |
| 907 | buf[1].tv_sec, buf[1].tv_nsec); |
| 908 | if (retval < 0) { |
| 909 | errno = -retval; |
| 910 | } |
| 911 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | static int proxy_remove(FsContext *ctx, const char *path) |
| 915 | { |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 916 | int retval; |
| 917 | V9fsString name; |
| 918 | v9fs_string_init(&name); |
| 919 | v9fs_string_sprintf(&name, "%s", path); |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 920 | retval = v9fs_request(ctx->private, T_REMOVE, NULL, &name); |
M. Mohan Kumar | ea75fc4 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 921 | v9fs_string_free(&name); |
| 922 | if (retval < 0) { |
| 923 | errno = -retval; |
| 924 | } |
| 925 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 926 | } |
| 927 | |
| 928 | static int proxy_fsync(FsContext *ctx, int fid_type, |
| 929 | V9fsFidOpenState *fs, int datasync) |
| 930 | { |
| 931 | int fd; |
| 932 | |
| 933 | if (fid_type == P9_FID_DIR) { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 934 | fd = dirfd(fs->dir.stream); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 935 | } else { |
| 936 | fd = fs->fd; |
| 937 | } |
| 938 | |
| 939 | if (datasync) { |
| 940 | return qemu_fdatasync(fd); |
| 941 | } else { |
| 942 | return fsync(fd); |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | static int proxy_statfs(FsContext *s, V9fsPath *fs_path, struct statfs *stbuf) |
| 947 | { |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 948 | int retval; |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 949 | retval = v9fs_request(s->private, T_STATFS, stbuf, fs_path); |
M. Mohan Kumar | b178adc | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 950 | if (retval < 0) { |
| 951 | errno = -retval; |
| 952 | return -1; |
| 953 | } |
| 954 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | static ssize_t proxy_lgetxattr(FsContext *ctx, V9fsPath *fs_path, |
| 958 | const char *name, void *value, size_t size) |
| 959 | { |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 960 | int retval; |
| 961 | V9fsString xname; |
| 962 | |
| 963 | v9fs_string_init(&xname); |
| 964 | v9fs_string_sprintf(&xname, "%s", name); |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 965 | retval = v9fs_request(ctx->private, T_LGETXATTR, value, size, fs_path, |
| 966 | &xname); |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 967 | v9fs_string_free(&xname); |
| 968 | if (retval < 0) { |
| 969 | errno = -retval; |
| 970 | } |
| 971 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 972 | } |
| 973 | |
| 974 | static ssize_t proxy_llistxattr(FsContext *ctx, V9fsPath *fs_path, |
| 975 | void *value, size_t size) |
| 976 | { |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 977 | int retval; |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 978 | retval = v9fs_request(ctx->private, T_LLISTXATTR, value, size, fs_path); |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 979 | if (retval < 0) { |
| 980 | errno = -retval; |
| 981 | } |
| 982 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 983 | } |
| 984 | |
| 985 | static int proxy_lsetxattr(FsContext *ctx, V9fsPath *fs_path, const char *name, |
| 986 | void *value, size_t size, int flags) |
| 987 | { |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 988 | int retval; |
| 989 | V9fsString xname, xvalue; |
| 990 | |
| 991 | v9fs_string_init(&xname); |
| 992 | v9fs_string_sprintf(&xname, "%s", name); |
| 993 | |
| 994 | v9fs_string_init(&xvalue); |
| 995 | xvalue.size = size; |
| 996 | xvalue.data = g_malloc(size); |
| 997 | memcpy(xvalue.data, value, size); |
| 998 | |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 999 | retval = v9fs_request(ctx->private, T_LSETXATTR, value, fs_path, &xname, |
| 1000 | &xvalue, size, flags); |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 1001 | v9fs_string_free(&xname); |
| 1002 | v9fs_string_free(&xvalue); |
| 1003 | if (retval < 0) { |
| 1004 | errno = -retval; |
| 1005 | } |
| 1006 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1007 | } |
| 1008 | |
| 1009 | static int proxy_lremovexattr(FsContext *ctx, V9fsPath *fs_path, |
| 1010 | const char *name) |
| 1011 | { |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 1012 | int retval; |
| 1013 | V9fsString xname; |
| 1014 | |
| 1015 | v9fs_string_init(&xname); |
| 1016 | v9fs_string_sprintf(&xname, "%s", name); |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 1017 | retval = v9fs_request(ctx->private, T_LREMOVEXATTR, NULL, fs_path, &xname); |
M. Mohan Kumar | d52b09e | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 1018 | v9fs_string_free(&xname); |
| 1019 | if (retval < 0) { |
| 1020 | errno = -retval; |
| 1021 | } |
| 1022 | return retval; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1023 | } |
| 1024 | |
| 1025 | static int proxy_name_to_path(FsContext *ctx, V9fsPath *dir_path, |
| 1026 | const char *name, V9fsPath *target) |
| 1027 | { |
| 1028 | if (dir_path) { |
Greg Kurz | e3e83f2 | 2016-09-16 08:56:15 +0200 | [diff] [blame] | 1029 | v9fs_path_sprintf(target, "%s/%s", dir_path->data, name); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1030 | } else { |
Greg Kurz | e3e83f2 | 2016-09-16 08:56:15 +0200 | [diff] [blame] | 1031 | v9fs_path_sprintf(target, "%s", name); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1032 | } |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1033 | return 0; |
| 1034 | } |
| 1035 | |
| 1036 | static int proxy_renameat(FsContext *ctx, V9fsPath *olddir, |
| 1037 | const char *old_name, V9fsPath *newdir, |
| 1038 | const char *new_name) |
| 1039 | { |
| 1040 | int ret; |
| 1041 | V9fsString old_full_name, new_full_name; |
| 1042 | |
| 1043 | v9fs_string_init(&old_full_name); |
| 1044 | v9fs_string_init(&new_full_name); |
| 1045 | |
| 1046 | v9fs_string_sprintf(&old_full_name, "%s/%s", olddir->data, old_name); |
| 1047 | v9fs_string_sprintf(&new_full_name, "%s/%s", newdir->data, new_name); |
| 1048 | |
| 1049 | ret = proxy_rename(ctx, old_full_name.data, new_full_name.data); |
| 1050 | v9fs_string_free(&old_full_name); |
| 1051 | v9fs_string_free(&new_full_name); |
| 1052 | return ret; |
| 1053 | } |
| 1054 | |
| 1055 | static int proxy_unlinkat(FsContext *ctx, V9fsPath *dir, |
| 1056 | const char *name, int flags) |
| 1057 | { |
| 1058 | int ret; |
| 1059 | V9fsString fullname; |
| 1060 | v9fs_string_init(&fullname); |
| 1061 | |
| 1062 | v9fs_string_sprintf(&fullname, "%s/%s", dir->data, name); |
| 1063 | ret = proxy_remove(ctx, fullname.data); |
| 1064 | v9fs_string_free(&fullname); |
| 1065 | |
| 1066 | return ret; |
| 1067 | } |
| 1068 | |
M. Mohan Kumar | d090e45 | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 1069 | static int proxy_ioc_getversion(FsContext *fs_ctx, V9fsPath *path, |
| 1070 | mode_t st_mode, uint64_t *st_gen) |
| 1071 | { |
| 1072 | int err; |
| 1073 | |
| 1074 | /* Do not try to open special files like device nodes, fifos etc |
| 1075 | * we can get fd for regular files and directories only |
| 1076 | */ |
| 1077 | if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) { |
Kirill A. Shutemov | 1a9978a | 2014-01-28 17:08:26 +0200 | [diff] [blame] | 1078 | errno = ENOTTY; |
| 1079 | return -1; |
M. Mohan Kumar | d090e45 | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 1080 | } |
Greg Kurz | 799fe08 | 2016-09-16 08:56:14 +0200 | [diff] [blame] | 1081 | err = v9fs_request(fs_ctx->private, T_GETVERSION, st_gen, path); |
M. Mohan Kumar | d090e45 | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 1082 | if (err < 0) { |
| 1083 | errno = -err; |
| 1084 | err = -1; |
| 1085 | } |
| 1086 | return err; |
| 1087 | } |
| 1088 | |
Greg Kurz | 65603a8 | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1089 | static int connect_namedsocket(const char *path, Error **errp) |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1090 | { |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1091 | int sockfd, size; |
| 1092 | struct sockaddr_un helper; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1093 | |
Shannon Zhao | 25ee9a7 | 2015-03-14 10:00:16 +0800 | [diff] [blame] | 1094 | if (strlen(path) >= sizeof(helper.sun_path)) { |
Greg Kurz | 65603a8 | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1095 | error_setg(errp, "socket name too long"); |
Shannon Zhao | 25ee9a7 | 2015-03-14 10:00:16 +0800 | [diff] [blame] | 1096 | return -1; |
| 1097 | } |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1098 | sockfd = socket(AF_UNIX, SOCK_STREAM, 0); |
| 1099 | if (sockfd < 0) { |
Greg Kurz | 65603a8 | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1100 | error_setg_errno(errp, errno, "failed to create client socket"); |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1101 | return -1; |
| 1102 | } |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1103 | strcpy(helper.sun_path, path); |
| 1104 | helper.sun_family = AF_UNIX; |
| 1105 | size = strlen(helper.sun_path) + sizeof(helper.sun_family); |
| 1106 | if (connect(sockfd, (struct sockaddr *)&helper, size) < 0) { |
Greg Kurz | 65603a8 | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1107 | error_setg_errno(errp, errno, "failed to connect to '%s'", path); |
Michael Tokarev | 660edd4 | 2014-10-30 10:53:02 +0300 | [diff] [blame] | 1108 | close(sockfd); |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1109 | return -1; |
| 1110 | } |
| 1111 | |
| 1112 | /* remove the socket for security reasons */ |
| 1113 | unlink(path); |
| 1114 | return sockfd; |
| 1115 | } |
| 1116 | |
Greg Kurz | 91cda4e | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1117 | static void error_append_socket_sockfd_hint(Error **errp) |
| 1118 | { |
| 1119 | error_append_hint(errp, "Either specify socket=/some/path where /some/path" |
| 1120 | " points to a listening AF_UNIX socket or sock_fd=fd" |
| 1121 | " where fd is a file descriptor to a connected AF_UNIX" |
| 1122 | " socket\n"); |
| 1123 | } |
| 1124 | |
| 1125 | static int proxy_parse_opts(QemuOpts *opts, FsDriverEntry *fs, Error **errp) |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1126 | { |
| 1127 | const char *socket = qemu_opt_get(opts, "socket"); |
| 1128 | const char *sock_fd = qemu_opt_get(opts, "sock_fd"); |
| 1129 | |
| 1130 | if (!socket && !sock_fd) { |
Greg Kurz | 91cda4e | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1131 | error_setg(errp, "both socket and sock_fd properties are missing"); |
| 1132 | error_append_socket_sockfd_hint(errp); |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1133 | return -1; |
| 1134 | } |
| 1135 | if (socket && sock_fd) { |
Greg Kurz | 91cda4e | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1136 | error_setg(errp, "both socket and sock_fd properties are set"); |
| 1137 | error_append_socket_sockfd_hint(errp); |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1138 | return -1; |
| 1139 | } |
| 1140 | if (socket) { |
| 1141 | fs->path = g_strdup(socket); |
| 1142 | fs->export_flags = V9FS_PROXY_SOCK_NAME; |
| 1143 | } else { |
| 1144 | fs->path = g_strdup(sock_fd); |
| 1145 | fs->export_flags = V9FS_PROXY_SOCK_FD; |
| 1146 | } |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1147 | return 0; |
| 1148 | } |
| 1149 | |
Greg Kurz | 65603a8 | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1150 | static int proxy_init(FsContext *ctx, Error **errp) |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1151 | { |
| 1152 | V9fsProxy *proxy = g_malloc(sizeof(V9fsProxy)); |
| 1153 | int sock_id; |
| 1154 | |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1155 | if (ctx->export_flags & V9FS_PROXY_SOCK_NAME) { |
Greg Kurz | 65603a8 | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1156 | sock_id = connect_namedsocket(ctx->fs_root, errp); |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1157 | } else { |
| 1158 | sock_id = atoi(ctx->fs_root); |
| 1159 | if (sock_id < 0) { |
Greg Kurz | 65603a8 | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1160 | error_setg(errp, "socket descriptor not initialized"); |
M. Mohan Kumar | 84a87cc | 2011-12-14 13:58:47 +0530 | [diff] [blame] | 1161 | } |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1162 | } |
Michael Tokarev | 6af76c6 | 2014-10-30 11:00:01 +0300 | [diff] [blame] | 1163 | if (sock_id < 0) { |
| 1164 | g_free(proxy); |
| 1165 | return -1; |
| 1166 | } |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1167 | g_free(ctx->fs_root); |
Stefan Weil | 80cba1b | 2013-06-16 12:14:36 +0200 | [diff] [blame] | 1168 | ctx->fs_root = NULL; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1169 | |
M. Mohan Kumar | 39f8c32 | 2011-12-14 13:58:45 +0530 | [diff] [blame] | 1170 | proxy->in_iovec.iov_base = g_malloc(PROXY_MAX_IO_SZ + PROXY_HDR_SZ); |
| 1171 | proxy->in_iovec.iov_len = PROXY_MAX_IO_SZ + PROXY_HDR_SZ; |
| 1172 | proxy->out_iovec.iov_base = g_malloc(PROXY_MAX_IO_SZ + PROXY_HDR_SZ); |
| 1173 | proxy->out_iovec.iov_len = PROXY_MAX_IO_SZ + PROXY_HDR_SZ; |
| 1174 | |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1175 | ctx->private = proxy; |
| 1176 | proxy->sockfd = sock_id; |
| 1177 | qemu_mutex_init(&proxy->mutex); |
| 1178 | |
| 1179 | ctx->export_flags |= V9FS_PATHNAME_FSCONTEXT; |
M. Mohan Kumar | d090e45 | 2011-12-14 13:58:46 +0530 | [diff] [blame] | 1180 | ctx->exops.get_st_gen = proxy_ioc_getversion; |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1181 | return 0; |
| 1182 | } |
| 1183 | |
Li Qiang | 898ae90 | 2016-11-23 13:53:34 +0100 | [diff] [blame] | 1184 | static void proxy_cleanup(FsContext *ctx) |
| 1185 | { |
| 1186 | V9fsProxy *proxy = ctx->private; |
| 1187 | |
| 1188 | g_free(proxy->out_iovec.iov_base); |
| 1189 | g_free(proxy->in_iovec.iov_base); |
| 1190 | if (ctx->export_flags & V9FS_PROXY_SOCK_NAME) { |
| 1191 | close(proxy->sockfd); |
| 1192 | } |
| 1193 | g_free(proxy); |
| 1194 | } |
| 1195 | |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1196 | FileOperations proxy_ops = { |
| 1197 | .parse_opts = proxy_parse_opts, |
| 1198 | .init = proxy_init, |
Li Qiang | 898ae90 | 2016-11-23 13:53:34 +0100 | [diff] [blame] | 1199 | .cleanup = proxy_cleanup, |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1200 | .lstat = proxy_lstat, |
| 1201 | .readlink = proxy_readlink, |
| 1202 | .close = proxy_close, |
| 1203 | .closedir = proxy_closedir, |
| 1204 | .open = proxy_open, |
| 1205 | .opendir = proxy_opendir, |
| 1206 | .rewinddir = proxy_rewinddir, |
| 1207 | .telldir = proxy_telldir, |
Greg Kurz | 635324e | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 1208 | .readdir = proxy_readdir, |
M. Mohan Kumar | 4c793dd | 2011-12-14 13:49:28 +0530 | [diff] [blame] | 1209 | .seekdir = proxy_seekdir, |
| 1210 | .preadv = proxy_preadv, |
| 1211 | .pwritev = proxy_pwritev, |
| 1212 | .chmod = proxy_chmod, |
| 1213 | .mknod = proxy_mknod, |
| 1214 | .mkdir = proxy_mkdir, |
| 1215 | .fstat = proxy_fstat, |
| 1216 | .open2 = proxy_open2, |
| 1217 | .symlink = proxy_symlink, |
| 1218 | .link = proxy_link, |
| 1219 | .truncate = proxy_truncate, |
| 1220 | .rename = proxy_rename, |
| 1221 | .chown = proxy_chown, |
| 1222 | .utimensat = proxy_utimensat, |
| 1223 | .remove = proxy_remove, |
| 1224 | .fsync = proxy_fsync, |
| 1225 | .statfs = proxy_statfs, |
| 1226 | .lgetxattr = proxy_lgetxattr, |
| 1227 | .llistxattr = proxy_llistxattr, |
| 1228 | .lsetxattr = proxy_lsetxattr, |
| 1229 | .lremovexattr = proxy_lremovexattr, |
| 1230 | .name_to_path = proxy_name_to_path, |
| 1231 | .renameat = proxy_renameat, |
| 1232 | .unlinkat = proxy_unlinkat, |
| 1233 | }; |