| 1 | /* |
| 2 | * linux/fs/nfs/nfs3proc.c |
| 3 | * |
| 4 | * Client-side NFSv3 procedures stubs. |
| 5 | * |
| 6 | * Copyright (C) 1997, Olaf Kirch |
| 7 | */ |
| 8 | |
| 9 | #include <linux/mm.h> |
| 10 | #include <linux/utsname.h> |
| 11 | #include <linux/errno.h> |
| 12 | #include <linux/string.h> |
| 13 | #include <linux/sunrpc/clnt.h> |
| 14 | #include <linux/nfs.h> |
| 15 | #include <linux/nfs3.h> |
| 16 | #include <linux/nfs_fs.h> |
| 17 | #include <linux/nfs_page.h> |
| 18 | #include <linux/lockd/bind.h> |
| 19 | #include <linux/nfs_mount.h> |
| 20 | |
| 21 | #include "iostat.h" |
| 22 | #include "internal.h" |
| 23 | |
| 24 | #define NFSDBG_FACILITY NFSDBG_PROC |
| 25 | |
| 26 | /* A wrapper to handle the EJUKEBOX error message */ |
| 27 | static int |
| 28 | nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) |
| 29 | { |
| 30 | sigset_t oldset; |
| 31 | int res; |
| 32 | rpc_clnt_sigmask(clnt, &oldset); |
| 33 | do { |
| 34 | res = rpc_call_sync(clnt, msg, flags); |
| 35 | if (res != -EJUKEBOX) |
| 36 | break; |
| 37 | schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME); |
| 38 | res = -ERESTARTSYS; |
| 39 | } while (!signalled()); |
| 40 | rpc_clnt_sigunmask(clnt, &oldset); |
| 41 | return res; |
| 42 | } |
| 43 | |
| 44 | #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags) |
| 45 | |
| 46 | static int |
| 47 | nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) |
| 48 | { |
| 49 | if (task->tk_status != -EJUKEBOX) |
| 50 | return 0; |
| 51 | nfs_inc_stats(inode, NFSIOS_DELAY); |
| 52 | task->tk_status = 0; |
| 53 | rpc_restart_call(task); |
| 54 | rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); |
| 55 | return 1; |
| 56 | } |
| 57 | |
| 58 | static int |
| 59 | do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, |
| 60 | struct nfs_fsinfo *info) |
| 61 | { |
| 62 | struct rpc_message msg = { |
| 63 | .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], |
| 64 | .rpc_argp = fhandle, |
| 65 | .rpc_resp = info, |
| 66 | }; |
| 67 | int status; |
| 68 | |
| 69 | dprintk("%s: call fsinfo\n", __FUNCTION__); |
| 70 | nfs_fattr_init(info->fattr); |
| 71 | status = rpc_call_sync(client, &msg, 0); |
| 72 | dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status); |
| 73 | if (!(info->fattr->valid & NFS_ATTR_FATTR)) { |
| 74 | msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; |
| 75 | msg.rpc_resp = info->fattr; |
| 76 | status = rpc_call_sync(client, &msg, 0); |
| 77 | dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); |
| 78 | } |
| 79 | return status; |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb |
| 84 | */ |
| 85 | static int |
| 86 | nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 87 | struct nfs_fsinfo *info) |
| 88 | { |
| 89 | int status; |
| 90 | |
| 91 | status = do_proc_get_root(server->client, fhandle, info); |
| 92 | if (status && server->nfs_client->cl_rpcclient != server->client) |
| 93 | status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info); |
| 94 | return status; |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * One function for each procedure in the NFS protocol. |
| 99 | */ |
| 100 | static int |
| 101 | nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
| 102 | struct nfs_fattr *fattr) |
| 103 | { |
| 104 | struct rpc_message msg = { |
| 105 | .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR], |
| 106 | .rpc_argp = fhandle, |
| 107 | .rpc_resp = fattr, |
| 108 | }; |
| 109 | int status; |
| 110 | |
| 111 | dprintk("NFS call getattr\n"); |
| 112 | nfs_fattr_init(fattr); |
| 113 | status = rpc_call_sync(server->client, &msg, 0); |
| 114 | dprintk("NFS reply getattr: %d\n", status); |
| 115 | return status; |
| 116 | } |
| 117 | |
| 118 | static int |
| 119 | nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| 120 | struct iattr *sattr) |
| 121 | { |
| 122 | struct inode *inode = dentry->d_inode; |
| 123 | struct nfs3_sattrargs arg = { |
| 124 | .fh = NFS_FH(inode), |
| 125 | .sattr = sattr, |
| 126 | }; |
| 127 | struct rpc_message msg = { |
| 128 | .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR], |
| 129 | .rpc_argp = &arg, |
| 130 | .rpc_resp = fattr, |
| 131 | }; |
| 132 | int status; |
| 133 | |
| 134 | dprintk("NFS call setattr\n"); |
| 135 | nfs_fattr_init(fattr); |
| 136 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 137 | if (status == 0) |
| 138 | nfs_setattr_update_inode(inode, sattr); |
| 139 | dprintk("NFS reply setattr: %d\n", status); |
| 140 | return status; |
| 141 | } |
| 142 | |
| 143 | static int |
| 144 | nfs3_proc_lookup(struct inode *dir, struct qstr *name, |
| 145 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 146 | { |
| 147 | struct nfs_fattr dir_attr; |
| 148 | struct nfs3_diropargs arg = { |
| 149 | .fh = NFS_FH(dir), |
| 150 | .name = name->name, |
| 151 | .len = name->len |
| 152 | }; |
| 153 | struct nfs3_diropres res = { |
| 154 | .dir_attr = &dir_attr, |
| 155 | .fh = fhandle, |
| 156 | .fattr = fattr |
| 157 | }; |
| 158 | struct rpc_message msg = { |
| 159 | .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], |
| 160 | .rpc_argp = &arg, |
| 161 | .rpc_resp = &res, |
| 162 | }; |
| 163 | int status; |
| 164 | |
| 165 | dprintk("NFS call lookup %s\n", name->name); |
| 166 | nfs_fattr_init(&dir_attr); |
| 167 | nfs_fattr_init(fattr); |
| 168 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 169 | if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { |
| 170 | msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; |
| 171 | msg.rpc_argp = fhandle; |
| 172 | msg.rpc_resp = fattr; |
| 173 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 174 | } |
| 175 | dprintk("NFS reply lookup: %d\n", status); |
| 176 | if (status >= 0) |
| 177 | status = nfs_refresh_inode(dir, &dir_attr); |
| 178 | return status; |
| 179 | } |
| 180 | |
| 181 | static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 182 | { |
| 183 | struct nfs_fattr fattr; |
| 184 | struct nfs3_accessargs arg = { |
| 185 | .fh = NFS_FH(inode), |
| 186 | }; |
| 187 | struct nfs3_accessres res = { |
| 188 | .fattr = &fattr, |
| 189 | }; |
| 190 | struct rpc_message msg = { |
| 191 | .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], |
| 192 | .rpc_argp = &arg, |
| 193 | .rpc_resp = &res, |
| 194 | .rpc_cred = entry->cred, |
| 195 | }; |
| 196 | int mode = entry->mask; |
| 197 | int status; |
| 198 | |
| 199 | dprintk("NFS call access\n"); |
| 200 | |
| 201 | if (mode & MAY_READ) |
| 202 | arg.access |= NFS3_ACCESS_READ; |
| 203 | if (S_ISDIR(inode->i_mode)) { |
| 204 | if (mode & MAY_WRITE) |
| 205 | arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE; |
| 206 | if (mode & MAY_EXEC) |
| 207 | arg.access |= NFS3_ACCESS_LOOKUP; |
| 208 | } else { |
| 209 | if (mode & MAY_WRITE) |
| 210 | arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND; |
| 211 | if (mode & MAY_EXEC) |
| 212 | arg.access |= NFS3_ACCESS_EXECUTE; |
| 213 | } |
| 214 | nfs_fattr_init(&fattr); |
| 215 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 216 | nfs_refresh_inode(inode, &fattr); |
| 217 | if (status == 0) { |
| 218 | entry->mask = 0; |
| 219 | if (res.access & NFS3_ACCESS_READ) |
| 220 | entry->mask |= MAY_READ; |
| 221 | if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE)) |
| 222 | entry->mask |= MAY_WRITE; |
| 223 | if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE)) |
| 224 | entry->mask |= MAY_EXEC; |
| 225 | } |
| 226 | dprintk("NFS reply access: %d\n", status); |
| 227 | return status; |
| 228 | } |
| 229 | |
| 230 | static int nfs3_proc_readlink(struct inode *inode, struct page *page, |
| 231 | unsigned int pgbase, unsigned int pglen) |
| 232 | { |
| 233 | struct nfs_fattr fattr; |
| 234 | struct nfs3_readlinkargs args = { |
| 235 | .fh = NFS_FH(inode), |
| 236 | .pgbase = pgbase, |
| 237 | .pglen = pglen, |
| 238 | .pages = &page |
| 239 | }; |
| 240 | struct rpc_message msg = { |
| 241 | .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], |
| 242 | .rpc_argp = &args, |
| 243 | .rpc_resp = &fattr, |
| 244 | }; |
| 245 | int status; |
| 246 | |
| 247 | dprintk("NFS call readlink\n"); |
| 248 | nfs_fattr_init(&fattr); |
| 249 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 250 | nfs_refresh_inode(inode, &fattr); |
| 251 | dprintk("NFS reply readlink: %d\n", status); |
| 252 | return status; |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * Create a regular file. |
| 257 | * For now, we don't implement O_EXCL. |
| 258 | */ |
| 259 | static int |
| 260 | nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| 261 | int flags, struct nameidata *nd) |
| 262 | { |
| 263 | struct nfs_fh fhandle; |
| 264 | struct nfs_fattr fattr; |
| 265 | struct nfs_fattr dir_attr; |
| 266 | struct nfs3_createargs arg = { |
| 267 | .fh = NFS_FH(dir), |
| 268 | .name = dentry->d_name.name, |
| 269 | .len = dentry->d_name.len, |
| 270 | .sattr = sattr, |
| 271 | }; |
| 272 | struct nfs3_diropres res = { |
| 273 | .dir_attr = &dir_attr, |
| 274 | .fh = &fhandle, |
| 275 | .fattr = &fattr |
| 276 | }; |
| 277 | struct rpc_message msg = { |
| 278 | .rpc_proc = &nfs3_procedures[NFS3PROC_CREATE], |
| 279 | .rpc_argp = &arg, |
| 280 | .rpc_resp = &res, |
| 281 | }; |
| 282 | mode_t mode = sattr->ia_mode; |
| 283 | int status; |
| 284 | |
| 285 | dprintk("NFS call create %s\n", dentry->d_name.name); |
| 286 | arg.createmode = NFS3_CREATE_UNCHECKED; |
| 287 | if (flags & O_EXCL) { |
| 288 | arg.createmode = NFS3_CREATE_EXCLUSIVE; |
| 289 | arg.verifier[0] = jiffies; |
| 290 | arg.verifier[1] = current->pid; |
| 291 | } |
| 292 | |
| 293 | sattr->ia_mode &= ~current->fs->umask; |
| 294 | |
| 295 | again: |
| 296 | nfs_fattr_init(&dir_attr); |
| 297 | nfs_fattr_init(&fattr); |
| 298 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 299 | nfs_refresh_inode(dir, &dir_attr); |
| 300 | |
| 301 | /* If the server doesn't support the exclusive creation semantics, |
| 302 | * try again with simple 'guarded' mode. */ |
| 303 | if (status == -ENOTSUPP) { |
| 304 | switch (arg.createmode) { |
| 305 | case NFS3_CREATE_EXCLUSIVE: |
| 306 | arg.createmode = NFS3_CREATE_GUARDED; |
| 307 | break; |
| 308 | |
| 309 | case NFS3_CREATE_GUARDED: |
| 310 | arg.createmode = NFS3_CREATE_UNCHECKED; |
| 311 | break; |
| 312 | |
| 313 | case NFS3_CREATE_UNCHECKED: |
| 314 | goto out; |
| 315 | } |
| 316 | goto again; |
| 317 | } |
| 318 | |
| 319 | if (status == 0) |
| 320 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
| 321 | if (status != 0) |
| 322 | goto out; |
| 323 | |
| 324 | /* When we created the file with exclusive semantics, make |
| 325 | * sure we set the attributes afterwards. */ |
| 326 | if (arg.createmode == NFS3_CREATE_EXCLUSIVE) { |
| 327 | dprintk("NFS call setattr (post-create)\n"); |
| 328 | |
| 329 | if (!(sattr->ia_valid & ATTR_ATIME_SET)) |
| 330 | sattr->ia_valid |= ATTR_ATIME; |
| 331 | if (!(sattr->ia_valid & ATTR_MTIME_SET)) |
| 332 | sattr->ia_valid |= ATTR_MTIME; |
| 333 | |
| 334 | /* Note: we could use a guarded setattr here, but I'm |
| 335 | * not sure this buys us anything (and I'd have |
| 336 | * to revamp the NFSv3 XDR code) */ |
| 337 | status = nfs3_proc_setattr(dentry, &fattr, sattr); |
| 338 | nfs_post_op_update_inode(dentry->d_inode, &fattr); |
| 339 | dprintk("NFS reply setattr (post-create): %d\n", status); |
| 340 | } |
| 341 | if (status != 0) |
| 342 | goto out; |
| 343 | status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); |
| 344 | out: |
| 345 | dprintk("NFS reply create: %d\n", status); |
| 346 | return status; |
| 347 | } |
| 348 | |
| 349 | static int |
| 350 | nfs3_proc_remove(struct inode *dir, struct qstr *name) |
| 351 | { |
| 352 | struct nfs_removeargs arg = { |
| 353 | .fh = NFS_FH(dir), |
| 354 | .name.len = name->len, |
| 355 | .name.name = name->name, |
| 356 | }; |
| 357 | struct nfs_removeres res; |
| 358 | struct rpc_message msg = { |
| 359 | .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], |
| 360 | .rpc_argp = &arg, |
| 361 | .rpc_resp = &res, |
| 362 | }; |
| 363 | int status; |
| 364 | |
| 365 | dprintk("NFS call remove %s\n", name->name); |
| 366 | nfs_fattr_init(&res.dir_attr); |
| 367 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 368 | nfs_post_op_update_inode(dir, &res.dir_attr); |
| 369 | dprintk("NFS reply remove: %d\n", status); |
| 370 | return status; |
| 371 | } |
| 372 | |
| 373 | static void |
| 374 | nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
| 375 | { |
| 376 | msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; |
| 377 | } |
| 378 | |
| 379 | static int |
| 380 | nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
| 381 | { |
| 382 | struct nfs_removeres *res; |
| 383 | if (nfs3_async_handle_jukebox(task, dir)) |
| 384 | return 0; |
| 385 | res = task->tk_msg.rpc_resp; |
| 386 | nfs_post_op_update_inode(dir, &res->dir_attr); |
| 387 | return 1; |
| 388 | } |
| 389 | |
| 390 | static int |
| 391 | nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 392 | struct inode *new_dir, struct qstr *new_name) |
| 393 | { |
| 394 | struct nfs_fattr old_dir_attr, new_dir_attr; |
| 395 | struct nfs3_renameargs arg = { |
| 396 | .fromfh = NFS_FH(old_dir), |
| 397 | .fromname = old_name->name, |
| 398 | .fromlen = old_name->len, |
| 399 | .tofh = NFS_FH(new_dir), |
| 400 | .toname = new_name->name, |
| 401 | .tolen = new_name->len |
| 402 | }; |
| 403 | struct nfs3_renameres res = { |
| 404 | .fromattr = &old_dir_attr, |
| 405 | .toattr = &new_dir_attr |
| 406 | }; |
| 407 | struct rpc_message msg = { |
| 408 | .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME], |
| 409 | .rpc_argp = &arg, |
| 410 | .rpc_resp = &res, |
| 411 | }; |
| 412 | int status; |
| 413 | |
| 414 | dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); |
| 415 | nfs_fattr_init(&old_dir_attr); |
| 416 | nfs_fattr_init(&new_dir_attr); |
| 417 | status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); |
| 418 | nfs_post_op_update_inode(old_dir, &old_dir_attr); |
| 419 | nfs_post_op_update_inode(new_dir, &new_dir_attr); |
| 420 | dprintk("NFS reply rename: %d\n", status); |
| 421 | return status; |
| 422 | } |
| 423 | |
| 424 | static int |
| 425 | nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 426 | { |
| 427 | struct nfs_fattr dir_attr, fattr; |
| 428 | struct nfs3_linkargs arg = { |
| 429 | .fromfh = NFS_FH(inode), |
| 430 | .tofh = NFS_FH(dir), |
| 431 | .toname = name->name, |
| 432 | .tolen = name->len |
| 433 | }; |
| 434 | struct nfs3_linkres res = { |
| 435 | .dir_attr = &dir_attr, |
| 436 | .fattr = &fattr |
| 437 | }; |
| 438 | struct rpc_message msg = { |
| 439 | .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], |
| 440 | .rpc_argp = &arg, |
| 441 | .rpc_resp = &res, |
| 442 | }; |
| 443 | int status; |
| 444 | |
| 445 | dprintk("NFS call link %s\n", name->name); |
| 446 | nfs_fattr_init(&dir_attr); |
| 447 | nfs_fattr_init(&fattr); |
| 448 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 449 | nfs_post_op_update_inode(dir, &dir_attr); |
| 450 | nfs_post_op_update_inode(inode, &fattr); |
| 451 | dprintk("NFS reply link: %d\n", status); |
| 452 | return status; |
| 453 | } |
| 454 | |
| 455 | static int |
| 456 | nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, |
| 457 | unsigned int len, struct iattr *sattr) |
| 458 | { |
| 459 | struct nfs_fh fhandle; |
| 460 | struct nfs_fattr fattr, dir_attr; |
| 461 | struct nfs3_symlinkargs arg = { |
| 462 | .fromfh = NFS_FH(dir), |
| 463 | .fromname = dentry->d_name.name, |
| 464 | .fromlen = dentry->d_name.len, |
| 465 | .pages = &page, |
| 466 | .pathlen = len, |
| 467 | .sattr = sattr |
| 468 | }; |
| 469 | struct nfs3_diropres res = { |
| 470 | .dir_attr = &dir_attr, |
| 471 | .fh = &fhandle, |
| 472 | .fattr = &fattr |
| 473 | }; |
| 474 | struct rpc_message msg = { |
| 475 | .rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK], |
| 476 | .rpc_argp = &arg, |
| 477 | .rpc_resp = &res, |
| 478 | }; |
| 479 | int status; |
| 480 | |
| 481 | if (len > NFS3_MAXPATHLEN) |
| 482 | return -ENAMETOOLONG; |
| 483 | |
| 484 | dprintk("NFS call symlink %s\n", dentry->d_name.name); |
| 485 | |
| 486 | nfs_fattr_init(&dir_attr); |
| 487 | nfs_fattr_init(&fattr); |
| 488 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 489 | nfs_post_op_update_inode(dir, &dir_attr); |
| 490 | if (status != 0) |
| 491 | goto out; |
| 492 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
| 493 | out: |
| 494 | dprintk("NFS reply symlink: %d\n", status); |
| 495 | return status; |
| 496 | } |
| 497 | |
| 498 | static int |
| 499 | nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) |
| 500 | { |
| 501 | struct nfs_fh fhandle; |
| 502 | struct nfs_fattr fattr, dir_attr; |
| 503 | struct nfs3_mkdirargs arg = { |
| 504 | .fh = NFS_FH(dir), |
| 505 | .name = dentry->d_name.name, |
| 506 | .len = dentry->d_name.len, |
| 507 | .sattr = sattr |
| 508 | }; |
| 509 | struct nfs3_diropres res = { |
| 510 | .dir_attr = &dir_attr, |
| 511 | .fh = &fhandle, |
| 512 | .fattr = &fattr |
| 513 | }; |
| 514 | struct rpc_message msg = { |
| 515 | .rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR], |
| 516 | .rpc_argp = &arg, |
| 517 | .rpc_resp = &res, |
| 518 | }; |
| 519 | int mode = sattr->ia_mode; |
| 520 | int status; |
| 521 | |
| 522 | dprintk("NFS call mkdir %s\n", dentry->d_name.name); |
| 523 | |
| 524 | sattr->ia_mode &= ~current->fs->umask; |
| 525 | |
| 526 | nfs_fattr_init(&dir_attr); |
| 527 | nfs_fattr_init(&fattr); |
| 528 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 529 | nfs_post_op_update_inode(dir, &dir_attr); |
| 530 | if (status != 0) |
| 531 | goto out; |
| 532 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
| 533 | if (status != 0) |
| 534 | goto out; |
| 535 | status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); |
| 536 | out: |
| 537 | dprintk("NFS reply mkdir: %d\n", status); |
| 538 | return status; |
| 539 | } |
| 540 | |
| 541 | static int |
| 542 | nfs3_proc_rmdir(struct inode *dir, struct qstr *name) |
| 543 | { |
| 544 | struct nfs_fattr dir_attr; |
| 545 | struct nfs3_diropargs arg = { |
| 546 | .fh = NFS_FH(dir), |
| 547 | .name = name->name, |
| 548 | .len = name->len |
| 549 | }; |
| 550 | struct rpc_message msg = { |
| 551 | .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], |
| 552 | .rpc_argp = &arg, |
| 553 | .rpc_resp = &dir_attr, |
| 554 | }; |
| 555 | int status; |
| 556 | |
| 557 | dprintk("NFS call rmdir %s\n", name->name); |
| 558 | nfs_fattr_init(&dir_attr); |
| 559 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 560 | nfs_post_op_update_inode(dir, &dir_attr); |
| 561 | dprintk("NFS reply rmdir: %d\n", status); |
| 562 | return status; |
| 563 | } |
| 564 | |
| 565 | /* |
| 566 | * The READDIR implementation is somewhat hackish - we pass the user buffer |
| 567 | * to the encode function, which installs it in the receive iovec. |
| 568 | * The decode function itself doesn't perform any decoding, it just makes |
| 569 | * sure the reply is syntactically correct. |
| 570 | * |
| 571 | * Also note that this implementation handles both plain readdir and |
| 572 | * readdirplus. |
| 573 | */ |
| 574 | static int |
| 575 | nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 576 | u64 cookie, struct page *page, unsigned int count, int plus) |
| 577 | { |
| 578 | struct inode *dir = dentry->d_inode; |
| 579 | struct nfs_fattr dir_attr; |
| 580 | __be32 *verf = NFS_COOKIEVERF(dir); |
| 581 | struct nfs3_readdirargs arg = { |
| 582 | .fh = NFS_FH(dir), |
| 583 | .cookie = cookie, |
| 584 | .verf = {verf[0], verf[1]}, |
| 585 | .plus = plus, |
| 586 | .count = count, |
| 587 | .pages = &page |
| 588 | }; |
| 589 | struct nfs3_readdirres res = { |
| 590 | .dir_attr = &dir_attr, |
| 591 | .verf = verf, |
| 592 | .plus = plus |
| 593 | }; |
| 594 | struct rpc_message msg = { |
| 595 | .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], |
| 596 | .rpc_argp = &arg, |
| 597 | .rpc_resp = &res, |
| 598 | .rpc_cred = cred |
| 599 | }; |
| 600 | int status; |
| 601 | |
| 602 | if (plus) |
| 603 | msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; |
| 604 | |
| 605 | dprintk("NFS call readdir%s %d\n", |
| 606 | plus? "plus" : "", (unsigned int) cookie); |
| 607 | |
| 608 | nfs_fattr_init(&dir_attr); |
| 609 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 610 | |
| 611 | nfs_invalidate_atime(dir); |
| 612 | |
| 613 | nfs_refresh_inode(dir, &dir_attr); |
| 614 | dprintk("NFS reply readdir: %d\n", status); |
| 615 | return status; |
| 616 | } |
| 617 | |
| 618 | static int |
| 619 | nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| 620 | dev_t rdev) |
| 621 | { |
| 622 | struct nfs_fh fh; |
| 623 | struct nfs_fattr fattr, dir_attr; |
| 624 | struct nfs3_mknodargs arg = { |
| 625 | .fh = NFS_FH(dir), |
| 626 | .name = dentry->d_name.name, |
| 627 | .len = dentry->d_name.len, |
| 628 | .sattr = sattr, |
| 629 | .rdev = rdev |
| 630 | }; |
| 631 | struct nfs3_diropres res = { |
| 632 | .dir_attr = &dir_attr, |
| 633 | .fh = &fh, |
| 634 | .fattr = &fattr |
| 635 | }; |
| 636 | struct rpc_message msg = { |
| 637 | .rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD], |
| 638 | .rpc_argp = &arg, |
| 639 | .rpc_resp = &res, |
| 640 | }; |
| 641 | mode_t mode = sattr->ia_mode; |
| 642 | int status; |
| 643 | |
| 644 | switch (sattr->ia_mode & S_IFMT) { |
| 645 | case S_IFBLK: arg.type = NF3BLK; break; |
| 646 | case S_IFCHR: arg.type = NF3CHR; break; |
| 647 | case S_IFIFO: arg.type = NF3FIFO; break; |
| 648 | case S_IFSOCK: arg.type = NF3SOCK; break; |
| 649 | default: return -EINVAL; |
| 650 | } |
| 651 | |
| 652 | dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name, |
| 653 | MAJOR(rdev), MINOR(rdev)); |
| 654 | |
| 655 | sattr->ia_mode &= ~current->fs->umask; |
| 656 | |
| 657 | nfs_fattr_init(&dir_attr); |
| 658 | nfs_fattr_init(&fattr); |
| 659 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 660 | nfs_post_op_update_inode(dir, &dir_attr); |
| 661 | if (status != 0) |
| 662 | goto out; |
| 663 | status = nfs_instantiate(dentry, &fh, &fattr); |
| 664 | if (status != 0) |
| 665 | goto out; |
| 666 | status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); |
| 667 | out: |
| 668 | dprintk("NFS reply mknod: %d\n", status); |
| 669 | return status; |
| 670 | } |
| 671 | |
| 672 | static int |
| 673 | nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| 674 | struct nfs_fsstat *stat) |
| 675 | { |
| 676 | struct rpc_message msg = { |
| 677 | .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], |
| 678 | .rpc_argp = fhandle, |
| 679 | .rpc_resp = stat, |
| 680 | }; |
| 681 | int status; |
| 682 | |
| 683 | dprintk("NFS call fsstat\n"); |
| 684 | nfs_fattr_init(stat->fattr); |
| 685 | status = rpc_call_sync(server->client, &msg, 0); |
| 686 | dprintk("NFS reply statfs: %d\n", status); |
| 687 | return status; |
| 688 | } |
| 689 | |
| 690 | static int |
| 691 | nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| 692 | struct nfs_fsinfo *info) |
| 693 | { |
| 694 | struct rpc_message msg = { |
| 695 | .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], |
| 696 | .rpc_argp = fhandle, |
| 697 | .rpc_resp = info, |
| 698 | }; |
| 699 | int status; |
| 700 | |
| 701 | dprintk("NFS call fsinfo\n"); |
| 702 | nfs_fattr_init(info->fattr); |
| 703 | status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); |
| 704 | dprintk("NFS reply fsinfo: %d\n", status); |
| 705 | return status; |
| 706 | } |
| 707 | |
| 708 | static int |
| 709 | nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 710 | struct nfs_pathconf *info) |
| 711 | { |
| 712 | struct rpc_message msg = { |
| 713 | .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], |
| 714 | .rpc_argp = fhandle, |
| 715 | .rpc_resp = info, |
| 716 | }; |
| 717 | int status; |
| 718 | |
| 719 | dprintk("NFS call pathconf\n"); |
| 720 | nfs_fattr_init(info->fattr); |
| 721 | status = rpc_call_sync(server->client, &msg, 0); |
| 722 | dprintk("NFS reply pathconf: %d\n", status); |
| 723 | return status; |
| 724 | } |
| 725 | |
| 726 | static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data) |
| 727 | { |
| 728 | if (nfs3_async_handle_jukebox(task, data->inode)) |
| 729 | return -EAGAIN; |
| 730 | /* Call back common NFS readpage processing */ |
| 731 | if (task->tk_status >= 0) |
| 732 | nfs_refresh_inode(data->inode, &data->fattr); |
| 733 | return 0; |
| 734 | } |
| 735 | |
| 736 | static void nfs3_proc_read_setup(struct nfs_read_data *data) |
| 737 | { |
| 738 | struct rpc_message msg = { |
| 739 | .rpc_proc = &nfs3_procedures[NFS3PROC_READ], |
| 740 | .rpc_argp = &data->args, |
| 741 | .rpc_resp = &data->res, |
| 742 | .rpc_cred = data->cred, |
| 743 | }; |
| 744 | |
| 745 | rpc_call_setup(&data->task, &msg, 0); |
| 746 | } |
| 747 | |
| 748 | static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data) |
| 749 | { |
| 750 | if (nfs3_async_handle_jukebox(task, data->inode)) |
| 751 | return -EAGAIN; |
| 752 | if (task->tk_status >= 0) |
| 753 | nfs_post_op_update_inode(data->inode, data->res.fattr); |
| 754 | return 0; |
| 755 | } |
| 756 | |
| 757 | static void nfs3_proc_write_setup(struct nfs_write_data *data, int how) |
| 758 | { |
| 759 | struct rpc_message msg = { |
| 760 | .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], |
| 761 | .rpc_argp = &data->args, |
| 762 | .rpc_resp = &data->res, |
| 763 | .rpc_cred = data->cred, |
| 764 | }; |
| 765 | |
| 766 | data->args.stable = NFS_UNSTABLE; |
| 767 | if (how & FLUSH_STABLE) { |
| 768 | data->args.stable = NFS_FILE_SYNC; |
| 769 | if (NFS_I(data->inode)->ncommit) |
| 770 | data->args.stable = NFS_DATA_SYNC; |
| 771 | } |
| 772 | |
| 773 | /* Finalize the task. */ |
| 774 | rpc_call_setup(&data->task, &msg, 0); |
| 775 | } |
| 776 | |
| 777 | static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
| 778 | { |
| 779 | if (nfs3_async_handle_jukebox(task, data->inode)) |
| 780 | return -EAGAIN; |
| 781 | if (task->tk_status >= 0) |
| 782 | nfs_post_op_update_inode(data->inode, data->res.fattr); |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | static void nfs3_proc_commit_setup(struct nfs_write_data *data, int how) |
| 787 | { |
| 788 | struct rpc_message msg = { |
| 789 | .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], |
| 790 | .rpc_argp = &data->args, |
| 791 | .rpc_resp = &data->res, |
| 792 | .rpc_cred = data->cred, |
| 793 | }; |
| 794 | |
| 795 | rpc_call_setup(&data->task, &msg, 0); |
| 796 | } |
| 797 | |
| 798 | static int |
| 799 | nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) |
| 800 | { |
| 801 | return nlmclnt_proc(filp->f_path.dentry->d_inode, cmd, fl); |
| 802 | } |
| 803 | |
| 804 | const struct nfs_rpc_ops nfs_v3_clientops = { |
| 805 | .version = 3, /* protocol version */ |
| 806 | .dentry_ops = &nfs_dentry_operations, |
| 807 | .dir_inode_ops = &nfs3_dir_inode_operations, |
| 808 | .file_inode_ops = &nfs3_file_inode_operations, |
| 809 | .getroot = nfs3_proc_get_root, |
| 810 | .getattr = nfs3_proc_getattr, |
| 811 | .setattr = nfs3_proc_setattr, |
| 812 | .lookup = nfs3_proc_lookup, |
| 813 | .access = nfs3_proc_access, |
| 814 | .readlink = nfs3_proc_readlink, |
| 815 | .create = nfs3_proc_create, |
| 816 | .remove = nfs3_proc_remove, |
| 817 | .unlink_setup = nfs3_proc_unlink_setup, |
| 818 | .unlink_done = nfs3_proc_unlink_done, |
| 819 | .rename = nfs3_proc_rename, |
| 820 | .link = nfs3_proc_link, |
| 821 | .symlink = nfs3_proc_symlink, |
| 822 | .mkdir = nfs3_proc_mkdir, |
| 823 | .rmdir = nfs3_proc_rmdir, |
| 824 | .readdir = nfs3_proc_readdir, |
| 825 | .mknod = nfs3_proc_mknod, |
| 826 | .statfs = nfs3_proc_statfs, |
| 827 | .fsinfo = nfs3_proc_fsinfo, |
| 828 | .pathconf = nfs3_proc_pathconf, |
| 829 | .decode_dirent = nfs3_decode_dirent, |
| 830 | .read_setup = nfs3_proc_read_setup, |
| 831 | .read_done = nfs3_read_done, |
| 832 | .write_setup = nfs3_proc_write_setup, |
| 833 | .write_done = nfs3_write_done, |
| 834 | .commit_setup = nfs3_proc_commit_setup, |
| 835 | .commit_done = nfs3_commit_done, |
| 836 | .file_open = nfs_open, |
| 837 | .file_release = nfs_release, |
| 838 | .lock = nfs3_proc_lock, |
| 839 | .clear_acl_cache = nfs3_forget_cached_acls, |
| 840 | }; |