Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfs/proc.c |
| 3 | * |
| 4 | * Copyright (C) 1992, 1993, 1994 Rick Sladkey |
| 5 | * |
| 6 | * OS-independent nfs remote procedure call functions |
| 7 | * |
| 8 | * Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers |
| 9 | * so at last we can have decent(ish) throughput off a |
| 10 | * Sun server. |
| 11 | * |
| 12 | * Coding optimized and cleaned up by Florian La Roche. |
| 13 | * Note: Error returns are optimized for NFS_OK, which isn't translated via |
| 14 | * nfs_stat_to_errno(), but happens to be already the right return code. |
| 15 | * |
| 16 | * Also, the code currently doesn't check the size of the packet, when |
| 17 | * it decodes the packet. |
| 18 | * |
| 19 | * Feel free to fix it and mail me the diffs if it worries you. |
| 20 | * |
| 21 | * Completely rewritten to support the new RPC call interface; |
| 22 | * rewrote and moved the entire XDR stuff to xdr.c |
| 23 | * --Olaf Kirch June 1996 |
| 24 | * |
| 25 | * The code below initializes all auto variables explicitly, otherwise |
| 26 | * it will fail to work as a module (gcc generates a memset call for an |
| 27 | * incomplete struct). |
| 28 | */ |
| 29 | |
| 30 | #include <linux/types.h> |
| 31 | #include <linux/param.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/time.h> |
| 34 | #include <linux/mm.h> |
| 35 | #include <linux/utsname.h> |
| 36 | #include <linux/errno.h> |
| 37 | #include <linux/string.h> |
| 38 | #include <linux/in.h> |
| 39 | #include <linux/pagemap.h> |
| 40 | #include <linux/sunrpc/clnt.h> |
| 41 | #include <linux/nfs.h> |
| 42 | #include <linux/nfs2.h> |
| 43 | #include <linux/nfs_fs.h> |
| 44 | #include <linux/nfs_page.h> |
| 45 | #include <linux/lockd/bind.h> |
| 46 | #include <linux/smp_lock.h> |
| 47 | |
| 48 | #define NFSDBG_FACILITY NFSDBG_PROC |
| 49 | |
| 50 | extern struct rpc_procinfo nfs_procedures[]; |
| 51 | |
| 52 | /* |
| 53 | * Bare-bones access to getattr: this is for nfs_read_super. |
| 54 | */ |
| 55 | static int |
| 56 | nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 57 | struct nfs_fsinfo *info) |
| 58 | { |
| 59 | struct nfs_fattr *fattr = info->fattr; |
| 60 | struct nfs2_fsstat fsinfo; |
| 61 | int status; |
| 62 | |
| 63 | dprintk("%s: call getattr\n", __FUNCTION__); |
| 64 | fattr->valid = 0; |
| 65 | status = rpc_call(server->client_sys, NFSPROC_GETATTR, fhandle, fattr, 0); |
| 66 | dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); |
| 67 | if (status) |
| 68 | return status; |
| 69 | dprintk("%s: call statfs\n", __FUNCTION__); |
| 70 | status = rpc_call(server->client_sys, NFSPROC_STATFS, fhandle, &fsinfo, 0); |
| 71 | dprintk("%s: reply statfs: %d\n", __FUNCTION__, status); |
| 72 | if (status) |
| 73 | return status; |
| 74 | info->rtmax = NFS_MAXDATA; |
| 75 | info->rtpref = fsinfo.tsize; |
| 76 | info->rtmult = fsinfo.bsize; |
| 77 | info->wtmax = NFS_MAXDATA; |
| 78 | info->wtpref = fsinfo.tsize; |
| 79 | info->wtmult = fsinfo.bsize; |
| 80 | info->dtpref = fsinfo.tsize; |
| 81 | info->maxfilesize = 0x7FFFFFFF; |
| 82 | info->lease_time = 0; |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * One function for each procedure in the NFS protocol. |
| 88 | */ |
| 89 | static int |
| 90 | nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
| 91 | struct nfs_fattr *fattr) |
| 92 | { |
| 93 | int status; |
| 94 | |
| 95 | dprintk("NFS call getattr\n"); |
| 96 | fattr->valid = 0; |
| 97 | status = rpc_call(server->client, NFSPROC_GETATTR, |
| 98 | fhandle, fattr, 0); |
| 99 | dprintk("NFS reply getattr: %d\n", status); |
| 100 | return status; |
| 101 | } |
| 102 | |
| 103 | static int |
| 104 | nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| 105 | struct iattr *sattr) |
| 106 | { |
| 107 | struct inode *inode = dentry->d_inode; |
| 108 | struct nfs_sattrargs arg = { |
| 109 | .fh = NFS_FH(inode), |
| 110 | .sattr = sattr |
| 111 | }; |
| 112 | int status; |
| 113 | |
| 114 | dprintk("NFS call setattr\n"); |
| 115 | fattr->valid = 0; |
| 116 | status = rpc_call(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, 0); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 117 | if (status == 0) |
| 118 | nfs_setattr_update_inode(inode, sattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | dprintk("NFS reply setattr: %d\n", status); |
| 120 | return status; |
| 121 | } |
| 122 | |
| 123 | static int |
| 124 | nfs_proc_lookup(struct inode *dir, struct qstr *name, |
| 125 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 126 | { |
| 127 | struct nfs_diropargs arg = { |
| 128 | .fh = NFS_FH(dir), |
| 129 | .name = name->name, |
| 130 | .len = name->len |
| 131 | }; |
| 132 | struct nfs_diropok res = { |
| 133 | .fh = fhandle, |
| 134 | .fattr = fattr |
| 135 | }; |
| 136 | int status; |
| 137 | |
| 138 | dprintk("NFS call lookup %s\n", name->name); |
| 139 | fattr->valid = 0; |
| 140 | status = rpc_call(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, 0); |
| 141 | dprintk("NFS reply lookup: %d\n", status); |
| 142 | return status; |
| 143 | } |
| 144 | |
| 145 | static int nfs_proc_readlink(struct inode *inode, struct page *page, |
| 146 | unsigned int pgbase, unsigned int pglen) |
| 147 | { |
| 148 | struct nfs_readlinkargs args = { |
| 149 | .fh = NFS_FH(inode), |
| 150 | .pgbase = pgbase, |
| 151 | .pglen = pglen, |
| 152 | .pages = &page |
| 153 | }; |
| 154 | int status; |
| 155 | |
| 156 | dprintk("NFS call readlink\n"); |
| 157 | status = rpc_call(NFS_CLIENT(inode), NFSPROC_READLINK, &args, NULL, 0); |
| 158 | dprintk("NFS reply readlink: %d\n", status); |
| 159 | return status; |
| 160 | } |
| 161 | |
| 162 | static int nfs_proc_read(struct nfs_read_data *rdata) |
| 163 | { |
| 164 | int flags = rdata->flags; |
| 165 | struct inode * inode = rdata->inode; |
| 166 | struct nfs_fattr * fattr = rdata->res.fattr; |
| 167 | struct rpc_message msg = { |
| 168 | .rpc_proc = &nfs_procedures[NFSPROC_READ], |
| 169 | .rpc_argp = &rdata->args, |
| 170 | .rpc_resp = &rdata->res, |
| 171 | .rpc_cred = rdata->cred, |
| 172 | }; |
| 173 | int status; |
| 174 | |
| 175 | dprintk("NFS call read %d @ %Ld\n", rdata->args.count, |
| 176 | (long long) rdata->args.offset); |
| 177 | fattr->valid = 0; |
| 178 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); |
| 179 | if (status >= 0) { |
| 180 | nfs_refresh_inode(inode, fattr); |
| 181 | /* Emulate the eof flag, which isn't normally needed in NFSv2 |
| 182 | * as it is guaranteed to always return the file attributes |
| 183 | */ |
| 184 | if (rdata->args.offset + rdata->args.count >= fattr->size) |
| 185 | rdata->res.eof = 1; |
| 186 | } |
| 187 | dprintk("NFS reply read: %d\n", status); |
| 188 | return status; |
| 189 | } |
| 190 | |
| 191 | static int nfs_proc_write(struct nfs_write_data *wdata) |
| 192 | { |
| 193 | int flags = wdata->flags; |
| 194 | struct inode * inode = wdata->inode; |
| 195 | struct nfs_fattr * fattr = wdata->res.fattr; |
| 196 | struct rpc_message msg = { |
| 197 | .rpc_proc = &nfs_procedures[NFSPROC_WRITE], |
| 198 | .rpc_argp = &wdata->args, |
| 199 | .rpc_resp = &wdata->res, |
| 200 | .rpc_cred = wdata->cred, |
| 201 | }; |
| 202 | int status; |
| 203 | |
| 204 | dprintk("NFS call write %d @ %Ld\n", wdata->args.count, |
| 205 | (long long) wdata->args.offset); |
| 206 | fattr->valid = 0; |
| 207 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); |
| 208 | if (status >= 0) { |
| 209 | nfs_refresh_inode(inode, fattr); |
| 210 | wdata->res.count = wdata->args.count; |
| 211 | wdata->verf.committed = NFS_FILE_SYNC; |
| 212 | } |
| 213 | dprintk("NFS reply write: %d\n", status); |
| 214 | return status < 0? status : wdata->res.count; |
| 215 | } |
| 216 | |
| 217 | static int |
| 218 | nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| 219 | int flags) |
| 220 | { |
| 221 | struct nfs_fh fhandle; |
| 222 | struct nfs_fattr fattr; |
| 223 | struct nfs_createargs arg = { |
| 224 | .fh = NFS_FH(dir), |
| 225 | .name = dentry->d_name.name, |
| 226 | .len = dentry->d_name.len, |
| 227 | .sattr = sattr |
| 228 | }; |
| 229 | struct nfs_diropok res = { |
| 230 | .fh = &fhandle, |
| 231 | .fattr = &fattr |
| 232 | }; |
| 233 | int status; |
| 234 | |
| 235 | fattr.valid = 0; |
| 236 | dprintk("NFS call create %s\n", dentry->d_name.name); |
| 237 | status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); |
| 238 | if (status == 0) |
| 239 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
| 240 | dprintk("NFS reply create: %d\n", status); |
| 241 | return status; |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * In NFSv2, mknod is grafted onto the create call. |
| 246 | */ |
| 247 | static int |
| 248 | nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| 249 | dev_t rdev) |
| 250 | { |
| 251 | struct nfs_fh fhandle; |
| 252 | struct nfs_fattr fattr; |
| 253 | struct nfs_createargs arg = { |
| 254 | .fh = NFS_FH(dir), |
| 255 | .name = dentry->d_name.name, |
| 256 | .len = dentry->d_name.len, |
| 257 | .sattr = sattr |
| 258 | }; |
| 259 | struct nfs_diropok res = { |
| 260 | .fh = &fhandle, |
| 261 | .fattr = &fattr |
| 262 | }; |
| 263 | int status, mode; |
| 264 | |
| 265 | dprintk("NFS call mknod %s\n", dentry->d_name.name); |
| 266 | |
| 267 | mode = sattr->ia_mode; |
| 268 | if (S_ISFIFO(mode)) { |
| 269 | sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; |
| 270 | sattr->ia_valid &= ~ATTR_SIZE; |
| 271 | } else if (S_ISCHR(mode) || S_ISBLK(mode)) { |
| 272 | sattr->ia_valid |= ATTR_SIZE; |
| 273 | sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ |
| 274 | } |
| 275 | |
| 276 | fattr.valid = 0; |
| 277 | status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); |
| 278 | |
| 279 | if (status == -EINVAL && S_ISFIFO(mode)) { |
| 280 | sattr->ia_mode = mode; |
| 281 | fattr.valid = 0; |
| 282 | status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); |
| 283 | } |
| 284 | if (status == 0) |
| 285 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
| 286 | dprintk("NFS reply mknod: %d\n", status); |
| 287 | return status; |
| 288 | } |
| 289 | |
| 290 | static int |
| 291 | nfs_proc_remove(struct inode *dir, struct qstr *name) |
| 292 | { |
| 293 | struct nfs_diropargs arg = { |
| 294 | .fh = NFS_FH(dir), |
| 295 | .name = name->name, |
| 296 | .len = name->len |
| 297 | }; |
| 298 | struct rpc_message msg = { |
| 299 | .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], |
| 300 | .rpc_argp = &arg, |
| 301 | .rpc_resp = NULL, |
| 302 | .rpc_cred = NULL |
| 303 | }; |
| 304 | int status; |
| 305 | |
| 306 | dprintk("NFS call remove %s\n", name->name); |
| 307 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 308 | |
| 309 | dprintk("NFS reply remove: %d\n", status); |
| 310 | return status; |
| 311 | } |
| 312 | |
| 313 | static int |
| 314 | nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) |
| 315 | { |
| 316 | struct nfs_diropargs *arg; |
| 317 | |
| 318 | arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL); |
| 319 | if (!arg) |
| 320 | return -ENOMEM; |
| 321 | arg->fh = NFS_FH(dir->d_inode); |
| 322 | arg->name = name->name; |
| 323 | arg->len = name->len; |
| 324 | msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; |
| 325 | msg->rpc_argp = arg; |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | static int |
| 330 | nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task) |
| 331 | { |
| 332 | struct rpc_message *msg = &task->tk_msg; |
| 333 | |
| 334 | if (msg->rpc_argp) |
| 335 | kfree(msg->rpc_argp); |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | static int |
| 340 | nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 341 | struct inode *new_dir, struct qstr *new_name) |
| 342 | { |
| 343 | struct nfs_renameargs arg = { |
| 344 | .fromfh = NFS_FH(old_dir), |
| 345 | .fromname = old_name->name, |
| 346 | .fromlen = old_name->len, |
| 347 | .tofh = NFS_FH(new_dir), |
| 348 | .toname = new_name->name, |
| 349 | .tolen = new_name->len |
| 350 | }; |
| 351 | int status; |
| 352 | |
| 353 | dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); |
| 354 | status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0); |
| 355 | dprintk("NFS reply rename: %d\n", status); |
| 356 | return status; |
| 357 | } |
| 358 | |
| 359 | static int |
| 360 | nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 361 | { |
| 362 | struct nfs_linkargs arg = { |
| 363 | .fromfh = NFS_FH(inode), |
| 364 | .tofh = NFS_FH(dir), |
| 365 | .toname = name->name, |
| 366 | .tolen = name->len |
| 367 | }; |
| 368 | int status; |
| 369 | |
| 370 | dprintk("NFS call link %s\n", name->name); |
| 371 | status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0); |
| 372 | dprintk("NFS reply link: %d\n", status); |
| 373 | return status; |
| 374 | } |
| 375 | |
| 376 | static int |
| 377 | nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, |
| 378 | struct iattr *sattr, struct nfs_fh *fhandle, |
| 379 | struct nfs_fattr *fattr) |
| 380 | { |
| 381 | struct nfs_symlinkargs arg = { |
| 382 | .fromfh = NFS_FH(dir), |
| 383 | .fromname = name->name, |
| 384 | .fromlen = name->len, |
| 385 | .topath = path->name, |
| 386 | .tolen = path->len, |
| 387 | .sattr = sattr |
| 388 | }; |
| 389 | int status; |
| 390 | |
| 391 | if (path->len > NFS2_MAXPATHLEN) |
| 392 | return -ENAMETOOLONG; |
| 393 | dprintk("NFS call symlink %s -> %s\n", name->name, path->name); |
| 394 | fattr->valid = 0; |
| 395 | fhandle->size = 0; |
| 396 | status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0); |
| 397 | dprintk("NFS reply symlink: %d\n", status); |
| 398 | return status; |
| 399 | } |
| 400 | |
| 401 | static int |
| 402 | nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) |
| 403 | { |
| 404 | struct nfs_fh fhandle; |
| 405 | struct nfs_fattr fattr; |
| 406 | struct nfs_createargs arg = { |
| 407 | .fh = NFS_FH(dir), |
| 408 | .name = dentry->d_name.name, |
| 409 | .len = dentry->d_name.len, |
| 410 | .sattr = sattr |
| 411 | }; |
| 412 | struct nfs_diropok res = { |
| 413 | .fh = &fhandle, |
| 414 | .fattr = &fattr |
| 415 | }; |
| 416 | int status; |
| 417 | |
| 418 | dprintk("NFS call mkdir %s\n", dentry->d_name.name); |
| 419 | fattr.valid = 0; |
| 420 | status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0); |
| 421 | if (status == 0) |
| 422 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
| 423 | dprintk("NFS reply mkdir: %d\n", status); |
| 424 | return status; |
| 425 | } |
| 426 | |
| 427 | static int |
| 428 | nfs_proc_rmdir(struct inode *dir, struct qstr *name) |
| 429 | { |
| 430 | struct nfs_diropargs arg = { |
| 431 | .fh = NFS_FH(dir), |
| 432 | .name = name->name, |
| 433 | .len = name->len |
| 434 | }; |
| 435 | int status; |
| 436 | |
| 437 | dprintk("NFS call rmdir %s\n", name->name); |
| 438 | status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0); |
| 439 | dprintk("NFS reply rmdir: %d\n", status); |
| 440 | return status; |
| 441 | } |
| 442 | |
| 443 | /* |
| 444 | * The READDIR implementation is somewhat hackish - we pass a temporary |
| 445 | * buffer to the encode function, which installs it in the receive |
| 446 | * the receive iovec. The decode function just parses the reply to make |
| 447 | * sure it is syntactically correct; the entries itself are decoded |
| 448 | * from nfs_readdir by calling the decode_entry function directly. |
| 449 | */ |
| 450 | static int |
| 451 | nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 452 | u64 cookie, struct page *page, unsigned int count, int plus) |
| 453 | { |
| 454 | struct inode *dir = dentry->d_inode; |
| 455 | struct nfs_readdirargs arg = { |
| 456 | .fh = NFS_FH(dir), |
| 457 | .cookie = cookie, |
| 458 | .count = count, |
| 459 | .pages = &page |
| 460 | }; |
| 461 | struct rpc_message msg = { |
| 462 | .rpc_proc = &nfs_procedures[NFSPROC_READDIR], |
| 463 | .rpc_argp = &arg, |
| 464 | .rpc_resp = NULL, |
| 465 | .rpc_cred = cred |
| 466 | }; |
| 467 | int status; |
| 468 | |
| 469 | lock_kernel(); |
| 470 | |
| 471 | dprintk("NFS call readdir %d\n", (unsigned int)cookie); |
| 472 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 473 | |
| 474 | dprintk("NFS reply readdir: %d\n", status); |
| 475 | unlock_kernel(); |
| 476 | return status; |
| 477 | } |
| 478 | |
| 479 | static int |
| 480 | nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| 481 | struct nfs_fsstat *stat) |
| 482 | { |
| 483 | struct nfs2_fsstat fsinfo; |
| 484 | int status; |
| 485 | |
| 486 | dprintk("NFS call statfs\n"); |
| 487 | stat->fattr->valid = 0; |
| 488 | status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); |
| 489 | dprintk("NFS reply statfs: %d\n", status); |
| 490 | if (status) |
| 491 | goto out; |
| 492 | stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; |
| 493 | stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; |
| 494 | stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; |
| 495 | stat->tfiles = 0; |
| 496 | stat->ffiles = 0; |
| 497 | stat->afiles = 0; |
| 498 | out: |
| 499 | return status; |
| 500 | } |
| 501 | |
| 502 | static int |
| 503 | nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| 504 | struct nfs_fsinfo *info) |
| 505 | { |
| 506 | struct nfs2_fsstat fsinfo; |
| 507 | int status; |
| 508 | |
| 509 | dprintk("NFS call fsinfo\n"); |
| 510 | info->fattr->valid = 0; |
| 511 | status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); |
| 512 | dprintk("NFS reply fsinfo: %d\n", status); |
| 513 | if (status) |
| 514 | goto out; |
| 515 | info->rtmax = NFS_MAXDATA; |
| 516 | info->rtpref = fsinfo.tsize; |
| 517 | info->rtmult = fsinfo.bsize; |
| 518 | info->wtmax = NFS_MAXDATA; |
| 519 | info->wtpref = fsinfo.tsize; |
| 520 | info->wtmult = fsinfo.bsize; |
| 521 | info->dtpref = fsinfo.tsize; |
| 522 | info->maxfilesize = 0x7FFFFFFF; |
| 523 | info->lease_time = 0; |
| 524 | out: |
| 525 | return status; |
| 526 | } |
| 527 | |
| 528 | static int |
| 529 | nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 530 | struct nfs_pathconf *info) |
| 531 | { |
| 532 | info->max_link = 0; |
| 533 | info->max_namelen = NFS2_MAXNAMLEN; |
| 534 | return 0; |
| 535 | } |
| 536 | |
| 537 | extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); |
| 538 | |
| 539 | static void |
| 540 | nfs_read_done(struct rpc_task *task) |
| 541 | { |
| 542 | struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata; |
| 543 | |
| 544 | if (task->tk_status >= 0) { |
| 545 | nfs_refresh_inode(data->inode, data->res.fattr); |
| 546 | /* Emulate the eof flag, which isn't normally needed in NFSv2 |
| 547 | * as it is guaranteed to always return the file attributes |
| 548 | */ |
| 549 | if (data->args.offset + data->args.count >= data->res.fattr->size) |
| 550 | data->res.eof = 1; |
| 551 | } |
| 552 | nfs_readpage_result(task); |
| 553 | } |
| 554 | |
| 555 | static void |
| 556 | nfs_proc_read_setup(struct nfs_read_data *data) |
| 557 | { |
| 558 | struct rpc_task *task = &data->task; |
| 559 | struct inode *inode = data->inode; |
| 560 | int flags; |
| 561 | struct rpc_message msg = { |
| 562 | .rpc_proc = &nfs_procedures[NFSPROC_READ], |
| 563 | .rpc_argp = &data->args, |
| 564 | .rpc_resp = &data->res, |
| 565 | .rpc_cred = data->cred, |
| 566 | }; |
| 567 | |
| 568 | /* N.B. Do we need to test? Never called for swapfile inode */ |
| 569 | flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); |
| 570 | |
| 571 | /* Finalize the task. */ |
| 572 | rpc_init_task(task, NFS_CLIENT(inode), nfs_read_done, flags); |
| 573 | rpc_call_setup(task, &msg, 0); |
| 574 | } |
| 575 | |
| 576 | static void |
| 577 | nfs_write_done(struct rpc_task *task) |
| 578 | { |
| 579 | struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; |
| 580 | |
| 581 | if (task->tk_status >= 0) |
| 582 | nfs_refresh_inode(data->inode, data->res.fattr); |
| 583 | nfs_writeback_done(task); |
| 584 | } |
| 585 | |
| 586 | static void |
| 587 | nfs_proc_write_setup(struct nfs_write_data *data, int how) |
| 588 | { |
| 589 | struct rpc_task *task = &data->task; |
| 590 | struct inode *inode = data->inode; |
| 591 | int flags; |
| 592 | struct rpc_message msg = { |
| 593 | .rpc_proc = &nfs_procedures[NFSPROC_WRITE], |
| 594 | .rpc_argp = &data->args, |
| 595 | .rpc_resp = &data->res, |
| 596 | .rpc_cred = data->cred, |
| 597 | }; |
| 598 | |
| 599 | /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ |
| 600 | data->args.stable = NFS_FILE_SYNC; |
| 601 | |
| 602 | /* Set the initial flags for the task. */ |
| 603 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; |
| 604 | |
| 605 | /* Finalize the task. */ |
| 606 | rpc_init_task(task, NFS_CLIENT(inode), nfs_write_done, flags); |
| 607 | rpc_call_setup(task, &msg, 0); |
| 608 | } |
| 609 | |
| 610 | static void |
| 611 | nfs_proc_commit_setup(struct nfs_write_data *data, int how) |
| 612 | { |
| 613 | BUG(); |
| 614 | } |
| 615 | |
| 616 | static int |
| 617 | nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) |
| 618 | { |
| 619 | return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); |
| 620 | } |
| 621 | |
| 622 | |
| 623 | struct nfs_rpc_ops nfs_v2_clientops = { |
| 624 | .version = 2, /* protocol version */ |
| 625 | .dentry_ops = &nfs_dentry_operations, |
| 626 | .dir_inode_ops = &nfs_dir_inode_operations, |
J. Bruce Fields | 92cfc62 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 627 | .file_inode_ops = &nfs_file_inode_operations, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | .getroot = nfs_proc_get_root, |
| 629 | .getattr = nfs_proc_getattr, |
| 630 | .setattr = nfs_proc_setattr, |
| 631 | .lookup = nfs_proc_lookup, |
| 632 | .access = NULL, /* access */ |
| 633 | .readlink = nfs_proc_readlink, |
| 634 | .read = nfs_proc_read, |
| 635 | .write = nfs_proc_write, |
| 636 | .commit = NULL, /* commit */ |
| 637 | .create = nfs_proc_create, |
| 638 | .remove = nfs_proc_remove, |
| 639 | .unlink_setup = nfs_proc_unlink_setup, |
| 640 | .unlink_done = nfs_proc_unlink_done, |
| 641 | .rename = nfs_proc_rename, |
| 642 | .link = nfs_proc_link, |
| 643 | .symlink = nfs_proc_symlink, |
| 644 | .mkdir = nfs_proc_mkdir, |
| 645 | .rmdir = nfs_proc_rmdir, |
| 646 | .readdir = nfs_proc_readdir, |
| 647 | .mknod = nfs_proc_mknod, |
| 648 | .statfs = nfs_proc_statfs, |
| 649 | .fsinfo = nfs_proc_fsinfo, |
| 650 | .pathconf = nfs_proc_pathconf, |
| 651 | .decode_dirent = nfs_decode_dirent, |
| 652 | .read_setup = nfs_proc_read_setup, |
| 653 | .write_setup = nfs_proc_write_setup, |
| 654 | .commit_setup = nfs_proc_commit_setup, |
| 655 | .file_open = nfs_open, |
| 656 | .file_release = nfs_release, |
| 657 | .lock = nfs_proc_lock, |
| 658 | }; |