| 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/errno.h> |
| 11 | #include <linux/string.h> |
| 12 | #include <linux/sunrpc/clnt.h> |
| 13 | #include <linux/slab.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 | #include <linux/freezer.h> |
| 21 | #include <linux/xattr.h> |
| 22 | |
| 23 | #include "iostat.h" |
| 24 | #include "internal.h" |
| 25 | #include "nfs3_fs.h" |
| 26 | |
| 27 | #define NFSDBG_FACILITY NFSDBG_PROC |
| 28 | |
| 29 | /* A wrapper to handle the EJUKEBOX error messages */ |
| 30 | static int |
| 31 | nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) |
| 32 | { |
| 33 | int res; |
| 34 | do { |
| 35 | res = rpc_call_sync(clnt, msg, flags); |
| 36 | if (res != -EJUKEBOX) |
| 37 | break; |
| 38 | freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME); |
| 39 | res = -ERESTARTSYS; |
| 40 | } while (!fatal_signal_pending(current)); |
| 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 | if (task->tk_status == -EJUKEBOX) |
| 52 | nfs_inc_stats(inode, NFSIOS_DELAY); |
| 53 | task->tk_status = 0; |
| 54 | rpc_restart_call(task); |
| 55 | rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); |
| 56 | return 1; |
| 57 | } |
| 58 | |
| 59 | static int |
| 60 | do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, |
| 61 | struct nfs_fsinfo *info) |
| 62 | { |
| 63 | struct rpc_message msg = { |
| 64 | .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], |
| 65 | .rpc_argp = fhandle, |
| 66 | .rpc_resp = info, |
| 67 | }; |
| 68 | int status; |
| 69 | |
| 70 | dprintk("%s: call fsinfo\n", __func__); |
| 71 | nfs_fattr_init(info->fattr); |
| 72 | status = rpc_call_sync(client, &msg, 0); |
| 73 | dprintk("%s: reply fsinfo: %d\n", __func__, status); |
| 74 | if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) { |
| 75 | msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; |
| 76 | msg.rpc_resp = info->fattr; |
| 77 | status = rpc_call_sync(client, &msg, 0); |
| 78 | dprintk("%s: reply getattr: %d\n", __func__, status); |
| 79 | } |
| 80 | return status; |
| 81 | } |
| 82 | |
| 83 | /* |
| 84 | * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb |
| 85 | */ |
| 86 | static int |
| 87 | nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 88 | struct nfs_fsinfo *info) |
| 89 | { |
| 90 | int status; |
| 91 | |
| 92 | status = do_proc_get_root(server->client, fhandle, info); |
| 93 | if (status && server->nfs_client->cl_rpcclient != server->client) |
| 94 | status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info); |
| 95 | return status; |
| 96 | } |
| 97 | |
| 98 | /* |
| 99 | * One function for each procedure in the NFS protocol. |
| 100 | */ |
| 101 | static int |
| 102 | nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
| 103 | struct nfs_fattr *fattr, struct nfs4_label *label) |
| 104 | { |
| 105 | struct rpc_message msg = { |
| 106 | .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR], |
| 107 | .rpc_argp = fhandle, |
| 108 | .rpc_resp = fattr, |
| 109 | }; |
| 110 | int status; |
| 111 | |
| 112 | dprintk("NFS call getattr\n"); |
| 113 | nfs_fattr_init(fattr); |
| 114 | status = rpc_call_sync(server->client, &msg, 0); |
| 115 | dprintk("NFS reply getattr: %d\n", status); |
| 116 | return status; |
| 117 | } |
| 118 | |
| 119 | static int |
| 120 | nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| 121 | struct iattr *sattr) |
| 122 | { |
| 123 | struct inode *inode = d_inode(dentry); |
| 124 | struct nfs3_sattrargs arg = { |
| 125 | .fh = NFS_FH(inode), |
| 126 | .sattr = sattr, |
| 127 | }; |
| 128 | struct rpc_message msg = { |
| 129 | .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR], |
| 130 | .rpc_argp = &arg, |
| 131 | .rpc_resp = fattr, |
| 132 | }; |
| 133 | int status; |
| 134 | |
| 135 | dprintk("NFS call setattr\n"); |
| 136 | if (sattr->ia_valid & ATTR_FILE) |
| 137 | msg.rpc_cred = nfs_file_cred(sattr->ia_file); |
| 138 | nfs_fattr_init(fattr); |
| 139 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 140 | if (status == 0) |
| 141 | nfs_setattr_update_inode(inode, sattr, fattr); |
| 142 | dprintk("NFS reply setattr: %d\n", status); |
| 143 | return status; |
| 144 | } |
| 145 | |
| 146 | static int |
| 147 | nfs3_proc_lookup(struct inode *dir, const struct qstr *name, |
| 148 | struct nfs_fh *fhandle, struct nfs_fattr *fattr, |
| 149 | struct nfs4_label *label) |
| 150 | { |
| 151 | struct nfs3_diropargs arg = { |
| 152 | .fh = NFS_FH(dir), |
| 153 | .name = name->name, |
| 154 | .len = name->len |
| 155 | }; |
| 156 | struct nfs3_diropres res = { |
| 157 | .fh = fhandle, |
| 158 | .fattr = fattr |
| 159 | }; |
| 160 | struct rpc_message msg = { |
| 161 | .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], |
| 162 | .rpc_argp = &arg, |
| 163 | .rpc_resp = &res, |
| 164 | }; |
| 165 | int status; |
| 166 | |
| 167 | dprintk("NFS call lookup %s\n", name->name); |
| 168 | res.dir_attr = nfs_alloc_fattr(); |
| 169 | if (res.dir_attr == NULL) |
| 170 | return -ENOMEM; |
| 171 | |
| 172 | nfs_fattr_init(fattr); |
| 173 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 174 | nfs_refresh_inode(dir, res.dir_attr); |
| 175 | if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { |
| 176 | msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; |
| 177 | msg.rpc_argp = fhandle; |
| 178 | msg.rpc_resp = fattr; |
| 179 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 180 | } |
| 181 | nfs_free_fattr(res.dir_attr); |
| 182 | dprintk("NFS reply lookup: %d\n", status); |
| 183 | return status; |
| 184 | } |
| 185 | |
| 186 | static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 187 | { |
| 188 | struct nfs3_accessargs arg = { |
| 189 | .fh = NFS_FH(inode), |
| 190 | }; |
| 191 | struct nfs3_accessres res; |
| 192 | struct rpc_message msg = { |
| 193 | .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], |
| 194 | .rpc_argp = &arg, |
| 195 | .rpc_resp = &res, |
| 196 | .rpc_cred = entry->cred, |
| 197 | }; |
| 198 | int mode = entry->mask; |
| 199 | int status = -ENOMEM; |
| 200 | |
| 201 | dprintk("NFS call access\n"); |
| 202 | |
| 203 | if (mode & MAY_READ) |
| 204 | arg.access |= NFS3_ACCESS_READ; |
| 205 | if (S_ISDIR(inode->i_mode)) { |
| 206 | if (mode & MAY_WRITE) |
| 207 | arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE; |
| 208 | if (mode & MAY_EXEC) |
| 209 | arg.access |= NFS3_ACCESS_LOOKUP; |
| 210 | } else { |
| 211 | if (mode & MAY_WRITE) |
| 212 | arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND; |
| 213 | if (mode & MAY_EXEC) |
| 214 | arg.access |= NFS3_ACCESS_EXECUTE; |
| 215 | } |
| 216 | |
| 217 | res.fattr = nfs_alloc_fattr(); |
| 218 | if (res.fattr == NULL) |
| 219 | goto out; |
| 220 | |
| 221 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 222 | nfs_refresh_inode(inode, res.fattr); |
| 223 | if (status == 0) { |
| 224 | entry->mask = 0; |
| 225 | if (res.access & NFS3_ACCESS_READ) |
| 226 | entry->mask |= MAY_READ; |
| 227 | if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE)) |
| 228 | entry->mask |= MAY_WRITE; |
| 229 | if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE)) |
| 230 | entry->mask |= MAY_EXEC; |
| 231 | } |
| 232 | nfs_free_fattr(res.fattr); |
| 233 | out: |
| 234 | dprintk("NFS reply access: %d\n", status); |
| 235 | return status; |
| 236 | } |
| 237 | |
| 238 | static int nfs3_proc_readlink(struct inode *inode, struct page *page, |
| 239 | unsigned int pgbase, unsigned int pglen) |
| 240 | { |
| 241 | struct nfs_fattr *fattr; |
| 242 | struct nfs3_readlinkargs args = { |
| 243 | .fh = NFS_FH(inode), |
| 244 | .pgbase = pgbase, |
| 245 | .pglen = pglen, |
| 246 | .pages = &page |
| 247 | }; |
| 248 | struct rpc_message msg = { |
| 249 | .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], |
| 250 | .rpc_argp = &args, |
| 251 | }; |
| 252 | int status = -ENOMEM; |
| 253 | |
| 254 | dprintk("NFS call readlink\n"); |
| 255 | fattr = nfs_alloc_fattr(); |
| 256 | if (fattr == NULL) |
| 257 | goto out; |
| 258 | msg.rpc_resp = fattr; |
| 259 | |
| 260 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 261 | nfs_refresh_inode(inode, fattr); |
| 262 | nfs_free_fattr(fattr); |
| 263 | out: |
| 264 | dprintk("NFS reply readlink: %d\n", status); |
| 265 | return status; |
| 266 | } |
| 267 | |
| 268 | struct nfs3_createdata { |
| 269 | struct rpc_message msg; |
| 270 | union { |
| 271 | struct nfs3_createargs create; |
| 272 | struct nfs3_mkdirargs mkdir; |
| 273 | struct nfs3_symlinkargs symlink; |
| 274 | struct nfs3_mknodargs mknod; |
| 275 | } arg; |
| 276 | struct nfs3_diropres res; |
| 277 | struct nfs_fh fh; |
| 278 | struct nfs_fattr fattr; |
| 279 | struct nfs_fattr dir_attr; |
| 280 | }; |
| 281 | |
| 282 | static struct nfs3_createdata *nfs3_alloc_createdata(void) |
| 283 | { |
| 284 | struct nfs3_createdata *data; |
| 285 | |
| 286 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 287 | if (data != NULL) { |
| 288 | data->msg.rpc_argp = &data->arg; |
| 289 | data->msg.rpc_resp = &data->res; |
| 290 | data->res.fh = &data->fh; |
| 291 | data->res.fattr = &data->fattr; |
| 292 | data->res.dir_attr = &data->dir_attr; |
| 293 | nfs_fattr_init(data->res.fattr); |
| 294 | nfs_fattr_init(data->res.dir_attr); |
| 295 | } |
| 296 | return data; |
| 297 | } |
| 298 | |
| 299 | static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data) |
| 300 | { |
| 301 | int status; |
| 302 | |
| 303 | status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); |
| 304 | nfs_post_op_update_inode(dir, data->res.dir_attr); |
| 305 | if (status == 0) |
| 306 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL); |
| 307 | return status; |
| 308 | } |
| 309 | |
| 310 | static void nfs3_free_createdata(struct nfs3_createdata *data) |
| 311 | { |
| 312 | kfree(data); |
| 313 | } |
| 314 | |
| 315 | /* |
| 316 | * Create a regular file. |
| 317 | */ |
| 318 | static int |
| 319 | nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| 320 | int flags) |
| 321 | { |
| 322 | struct posix_acl *default_acl, *acl; |
| 323 | struct nfs3_createdata *data; |
| 324 | int status = -ENOMEM; |
| 325 | |
| 326 | dprintk("NFS call create %pd\n", dentry); |
| 327 | |
| 328 | data = nfs3_alloc_createdata(); |
| 329 | if (data == NULL) |
| 330 | goto out; |
| 331 | |
| 332 | data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE]; |
| 333 | data->arg.create.fh = NFS_FH(dir); |
| 334 | data->arg.create.name = dentry->d_name.name; |
| 335 | data->arg.create.len = dentry->d_name.len; |
| 336 | data->arg.create.sattr = sattr; |
| 337 | |
| 338 | data->arg.create.createmode = NFS3_CREATE_UNCHECKED; |
| 339 | if (flags & O_EXCL) { |
| 340 | data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE; |
| 341 | data->arg.create.verifier[0] = cpu_to_be32(jiffies); |
| 342 | data->arg.create.verifier[1] = cpu_to_be32(current->pid); |
| 343 | } |
| 344 | |
| 345 | status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); |
| 346 | if (status) |
| 347 | goto out; |
| 348 | |
| 349 | for (;;) { |
| 350 | status = nfs3_do_create(dir, dentry, data); |
| 351 | |
| 352 | if (status != -ENOTSUPP) |
| 353 | break; |
| 354 | /* If the server doesn't support the exclusive creation |
| 355 | * semantics, try again with simple 'guarded' mode. */ |
| 356 | switch (data->arg.create.createmode) { |
| 357 | case NFS3_CREATE_EXCLUSIVE: |
| 358 | data->arg.create.createmode = NFS3_CREATE_GUARDED; |
| 359 | break; |
| 360 | |
| 361 | case NFS3_CREATE_GUARDED: |
| 362 | data->arg.create.createmode = NFS3_CREATE_UNCHECKED; |
| 363 | break; |
| 364 | |
| 365 | case NFS3_CREATE_UNCHECKED: |
| 366 | goto out; |
| 367 | } |
| 368 | nfs_fattr_init(data->res.dir_attr); |
| 369 | nfs_fattr_init(data->res.fattr); |
| 370 | } |
| 371 | |
| 372 | if (status != 0) |
| 373 | goto out_release_acls; |
| 374 | |
| 375 | /* When we created the file with exclusive semantics, make |
| 376 | * sure we set the attributes afterwards. */ |
| 377 | if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) { |
| 378 | dprintk("NFS call setattr (post-create)\n"); |
| 379 | |
| 380 | if (!(sattr->ia_valid & ATTR_ATIME_SET)) |
| 381 | sattr->ia_valid |= ATTR_ATIME; |
| 382 | if (!(sattr->ia_valid & ATTR_MTIME_SET)) |
| 383 | sattr->ia_valid |= ATTR_MTIME; |
| 384 | |
| 385 | /* Note: we could use a guarded setattr here, but I'm |
| 386 | * not sure this buys us anything (and I'd have |
| 387 | * to revamp the NFSv3 XDR code) */ |
| 388 | status = nfs3_proc_setattr(dentry, data->res.fattr, sattr); |
| 389 | nfs_post_op_update_inode(d_inode(dentry), data->res.fattr); |
| 390 | dprintk("NFS reply setattr (post-create): %d\n", status); |
| 391 | if (status != 0) |
| 392 | goto out_release_acls; |
| 393 | } |
| 394 | |
| 395 | status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); |
| 396 | |
| 397 | out_release_acls: |
| 398 | posix_acl_release(acl); |
| 399 | posix_acl_release(default_acl); |
| 400 | out: |
| 401 | nfs3_free_createdata(data); |
| 402 | dprintk("NFS reply create: %d\n", status); |
| 403 | return status; |
| 404 | } |
| 405 | |
| 406 | static int |
| 407 | nfs3_proc_remove(struct inode *dir, const struct qstr *name) |
| 408 | { |
| 409 | struct nfs_removeargs arg = { |
| 410 | .fh = NFS_FH(dir), |
| 411 | .name = *name, |
| 412 | }; |
| 413 | struct nfs_removeres res; |
| 414 | struct rpc_message msg = { |
| 415 | .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], |
| 416 | .rpc_argp = &arg, |
| 417 | .rpc_resp = &res, |
| 418 | }; |
| 419 | int status = -ENOMEM; |
| 420 | |
| 421 | dprintk("NFS call remove %s\n", name->name); |
| 422 | res.dir_attr = nfs_alloc_fattr(); |
| 423 | if (res.dir_attr == NULL) |
| 424 | goto out; |
| 425 | |
| 426 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 427 | nfs_post_op_update_inode(dir, res.dir_attr); |
| 428 | nfs_free_fattr(res.dir_attr); |
| 429 | out: |
| 430 | dprintk("NFS reply remove: %d\n", status); |
| 431 | return status; |
| 432 | } |
| 433 | |
| 434 | static void |
| 435 | nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
| 436 | { |
| 437 | msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; |
| 438 | } |
| 439 | |
| 440 | static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) |
| 441 | { |
| 442 | rpc_call_start(task); |
| 443 | } |
| 444 | |
| 445 | static int |
| 446 | nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
| 447 | { |
| 448 | struct nfs_removeres *res; |
| 449 | if (nfs3_async_handle_jukebox(task, dir)) |
| 450 | return 0; |
| 451 | res = task->tk_msg.rpc_resp; |
| 452 | nfs_post_op_update_inode(dir, res->dir_attr); |
| 453 | return 1; |
| 454 | } |
| 455 | |
| 456 | static void |
| 457 | nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir) |
| 458 | { |
| 459 | msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME]; |
| 460 | } |
| 461 | |
| 462 | static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) |
| 463 | { |
| 464 | rpc_call_start(task); |
| 465 | } |
| 466 | |
| 467 | static int |
| 468 | nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir, |
| 469 | struct inode *new_dir) |
| 470 | { |
| 471 | struct nfs_renameres *res; |
| 472 | |
| 473 | if (nfs3_async_handle_jukebox(task, old_dir)) |
| 474 | return 0; |
| 475 | res = task->tk_msg.rpc_resp; |
| 476 | |
| 477 | nfs_post_op_update_inode(old_dir, res->old_fattr); |
| 478 | nfs_post_op_update_inode(new_dir, res->new_fattr); |
| 479 | return 1; |
| 480 | } |
| 481 | |
| 482 | static int |
| 483 | nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) |
| 484 | { |
| 485 | struct nfs3_linkargs arg = { |
| 486 | .fromfh = NFS_FH(inode), |
| 487 | .tofh = NFS_FH(dir), |
| 488 | .toname = name->name, |
| 489 | .tolen = name->len |
| 490 | }; |
| 491 | struct nfs3_linkres res; |
| 492 | struct rpc_message msg = { |
| 493 | .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], |
| 494 | .rpc_argp = &arg, |
| 495 | .rpc_resp = &res, |
| 496 | }; |
| 497 | int status = -ENOMEM; |
| 498 | |
| 499 | dprintk("NFS call link %s\n", name->name); |
| 500 | res.fattr = nfs_alloc_fattr(); |
| 501 | res.dir_attr = nfs_alloc_fattr(); |
| 502 | if (res.fattr == NULL || res.dir_attr == NULL) |
| 503 | goto out; |
| 504 | |
| 505 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 506 | nfs_post_op_update_inode(dir, res.dir_attr); |
| 507 | nfs_post_op_update_inode(inode, res.fattr); |
| 508 | out: |
| 509 | nfs_free_fattr(res.dir_attr); |
| 510 | nfs_free_fattr(res.fattr); |
| 511 | dprintk("NFS reply link: %d\n", status); |
| 512 | return status; |
| 513 | } |
| 514 | |
| 515 | static int |
| 516 | nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, |
| 517 | unsigned int len, struct iattr *sattr) |
| 518 | { |
| 519 | struct nfs3_createdata *data; |
| 520 | int status = -ENOMEM; |
| 521 | |
| 522 | if (len > NFS3_MAXPATHLEN) |
| 523 | return -ENAMETOOLONG; |
| 524 | |
| 525 | dprintk("NFS call symlink %pd\n", dentry); |
| 526 | |
| 527 | data = nfs3_alloc_createdata(); |
| 528 | if (data == NULL) |
| 529 | goto out; |
| 530 | data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK]; |
| 531 | data->arg.symlink.fromfh = NFS_FH(dir); |
| 532 | data->arg.symlink.fromname = dentry->d_name.name; |
| 533 | data->arg.symlink.fromlen = dentry->d_name.len; |
| 534 | data->arg.symlink.pages = &page; |
| 535 | data->arg.symlink.pathlen = len; |
| 536 | data->arg.symlink.sattr = sattr; |
| 537 | |
| 538 | status = nfs3_do_create(dir, dentry, data); |
| 539 | |
| 540 | nfs3_free_createdata(data); |
| 541 | out: |
| 542 | dprintk("NFS reply symlink: %d\n", status); |
| 543 | return status; |
| 544 | } |
| 545 | |
| 546 | static int |
| 547 | nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) |
| 548 | { |
| 549 | struct posix_acl *default_acl, *acl; |
| 550 | struct nfs3_createdata *data; |
| 551 | int status = -ENOMEM; |
| 552 | |
| 553 | dprintk("NFS call mkdir %pd\n", dentry); |
| 554 | |
| 555 | data = nfs3_alloc_createdata(); |
| 556 | if (data == NULL) |
| 557 | goto out; |
| 558 | |
| 559 | status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); |
| 560 | if (status) |
| 561 | goto out; |
| 562 | |
| 563 | data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR]; |
| 564 | data->arg.mkdir.fh = NFS_FH(dir); |
| 565 | data->arg.mkdir.name = dentry->d_name.name; |
| 566 | data->arg.mkdir.len = dentry->d_name.len; |
| 567 | data->arg.mkdir.sattr = sattr; |
| 568 | |
| 569 | status = nfs3_do_create(dir, dentry, data); |
| 570 | if (status != 0) |
| 571 | goto out_release_acls; |
| 572 | |
| 573 | status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); |
| 574 | |
| 575 | out_release_acls: |
| 576 | posix_acl_release(acl); |
| 577 | posix_acl_release(default_acl); |
| 578 | out: |
| 579 | nfs3_free_createdata(data); |
| 580 | dprintk("NFS reply mkdir: %d\n", status); |
| 581 | return status; |
| 582 | } |
| 583 | |
| 584 | static int |
| 585 | nfs3_proc_rmdir(struct inode *dir, const struct qstr *name) |
| 586 | { |
| 587 | struct nfs_fattr *dir_attr; |
| 588 | struct nfs3_diropargs arg = { |
| 589 | .fh = NFS_FH(dir), |
| 590 | .name = name->name, |
| 591 | .len = name->len |
| 592 | }; |
| 593 | struct rpc_message msg = { |
| 594 | .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], |
| 595 | .rpc_argp = &arg, |
| 596 | }; |
| 597 | int status = -ENOMEM; |
| 598 | |
| 599 | dprintk("NFS call rmdir %s\n", name->name); |
| 600 | dir_attr = nfs_alloc_fattr(); |
| 601 | if (dir_attr == NULL) |
| 602 | goto out; |
| 603 | |
| 604 | msg.rpc_resp = dir_attr; |
| 605 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 606 | nfs_post_op_update_inode(dir, dir_attr); |
| 607 | nfs_free_fattr(dir_attr); |
| 608 | out: |
| 609 | dprintk("NFS reply rmdir: %d\n", status); |
| 610 | return status; |
| 611 | } |
| 612 | |
| 613 | /* |
| 614 | * The READDIR implementation is somewhat hackish - we pass the user buffer |
| 615 | * to the encode function, which installs it in the receive iovec. |
| 616 | * The decode function itself doesn't perform any decoding, it just makes |
| 617 | * sure the reply is syntactically correct. |
| 618 | * |
| 619 | * Also note that this implementation handles both plain readdir and |
| 620 | * readdirplus. |
| 621 | */ |
| 622 | static int |
| 623 | nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 624 | u64 cookie, struct page **pages, unsigned int count, int plus) |
| 625 | { |
| 626 | struct inode *dir = d_inode(dentry); |
| 627 | __be32 *verf = NFS_I(dir)->cookieverf; |
| 628 | struct nfs3_readdirargs arg = { |
| 629 | .fh = NFS_FH(dir), |
| 630 | .cookie = cookie, |
| 631 | .verf = {verf[0], verf[1]}, |
| 632 | .plus = plus, |
| 633 | .count = count, |
| 634 | .pages = pages |
| 635 | }; |
| 636 | struct nfs3_readdirres res = { |
| 637 | .verf = verf, |
| 638 | .plus = plus |
| 639 | }; |
| 640 | struct rpc_message msg = { |
| 641 | .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], |
| 642 | .rpc_argp = &arg, |
| 643 | .rpc_resp = &res, |
| 644 | .rpc_cred = cred |
| 645 | }; |
| 646 | int status = -ENOMEM; |
| 647 | |
| 648 | if (plus) |
| 649 | msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; |
| 650 | |
| 651 | dprintk("NFS call readdir%s %d\n", |
| 652 | plus? "plus" : "", (unsigned int) cookie); |
| 653 | |
| 654 | res.dir_attr = nfs_alloc_fattr(); |
| 655 | if (res.dir_attr == NULL) |
| 656 | goto out; |
| 657 | |
| 658 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 659 | |
| 660 | nfs_invalidate_atime(dir); |
| 661 | nfs_refresh_inode(dir, res.dir_attr); |
| 662 | |
| 663 | nfs_free_fattr(res.dir_attr); |
| 664 | out: |
| 665 | dprintk("NFS reply readdir%s: %d\n", |
| 666 | plus? "plus" : "", status); |
| 667 | return status; |
| 668 | } |
| 669 | |
| 670 | static int |
| 671 | nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| 672 | dev_t rdev) |
| 673 | { |
| 674 | struct posix_acl *default_acl, *acl; |
| 675 | struct nfs3_createdata *data; |
| 676 | int status = -ENOMEM; |
| 677 | |
| 678 | dprintk("NFS call mknod %pd %u:%u\n", dentry, |
| 679 | MAJOR(rdev), MINOR(rdev)); |
| 680 | |
| 681 | data = nfs3_alloc_createdata(); |
| 682 | if (data == NULL) |
| 683 | goto out; |
| 684 | |
| 685 | status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); |
| 686 | if (status) |
| 687 | goto out; |
| 688 | |
| 689 | data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD]; |
| 690 | data->arg.mknod.fh = NFS_FH(dir); |
| 691 | data->arg.mknod.name = dentry->d_name.name; |
| 692 | data->arg.mknod.len = dentry->d_name.len; |
| 693 | data->arg.mknod.sattr = sattr; |
| 694 | data->arg.mknod.rdev = rdev; |
| 695 | |
| 696 | switch (sattr->ia_mode & S_IFMT) { |
| 697 | case S_IFBLK: |
| 698 | data->arg.mknod.type = NF3BLK; |
| 699 | break; |
| 700 | case S_IFCHR: |
| 701 | data->arg.mknod.type = NF3CHR; |
| 702 | break; |
| 703 | case S_IFIFO: |
| 704 | data->arg.mknod.type = NF3FIFO; |
| 705 | break; |
| 706 | case S_IFSOCK: |
| 707 | data->arg.mknod.type = NF3SOCK; |
| 708 | break; |
| 709 | default: |
| 710 | status = -EINVAL; |
| 711 | goto out; |
| 712 | } |
| 713 | |
| 714 | status = nfs3_do_create(dir, dentry, data); |
| 715 | if (status != 0) |
| 716 | goto out_release_acls; |
| 717 | |
| 718 | status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); |
| 719 | |
| 720 | out_release_acls: |
| 721 | posix_acl_release(acl); |
| 722 | posix_acl_release(default_acl); |
| 723 | out: |
| 724 | nfs3_free_createdata(data); |
| 725 | dprintk("NFS reply mknod: %d\n", status); |
| 726 | return status; |
| 727 | } |
| 728 | |
| 729 | static int |
| 730 | nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| 731 | struct nfs_fsstat *stat) |
| 732 | { |
| 733 | struct rpc_message msg = { |
| 734 | .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], |
| 735 | .rpc_argp = fhandle, |
| 736 | .rpc_resp = stat, |
| 737 | }; |
| 738 | int status; |
| 739 | |
| 740 | dprintk("NFS call fsstat\n"); |
| 741 | nfs_fattr_init(stat->fattr); |
| 742 | status = rpc_call_sync(server->client, &msg, 0); |
| 743 | dprintk("NFS reply fsstat: %d\n", status); |
| 744 | return status; |
| 745 | } |
| 746 | |
| 747 | static int |
| 748 | do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle, |
| 749 | struct nfs_fsinfo *info) |
| 750 | { |
| 751 | struct rpc_message msg = { |
| 752 | .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], |
| 753 | .rpc_argp = fhandle, |
| 754 | .rpc_resp = info, |
| 755 | }; |
| 756 | int status; |
| 757 | |
| 758 | dprintk("NFS call fsinfo\n"); |
| 759 | nfs_fattr_init(info->fattr); |
| 760 | status = rpc_call_sync(client, &msg, 0); |
| 761 | dprintk("NFS reply fsinfo: %d\n", status); |
| 762 | return status; |
| 763 | } |
| 764 | |
| 765 | /* |
| 766 | * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via |
| 767 | * nfs_create_server |
| 768 | */ |
| 769 | static int |
| 770 | nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| 771 | struct nfs_fsinfo *info) |
| 772 | { |
| 773 | int status; |
| 774 | |
| 775 | status = do_proc_fsinfo(server->client, fhandle, info); |
| 776 | if (status && server->nfs_client->cl_rpcclient != server->client) |
| 777 | status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info); |
| 778 | return status; |
| 779 | } |
| 780 | |
| 781 | static int |
| 782 | nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 783 | struct nfs_pathconf *info) |
| 784 | { |
| 785 | struct rpc_message msg = { |
| 786 | .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], |
| 787 | .rpc_argp = fhandle, |
| 788 | .rpc_resp = info, |
| 789 | }; |
| 790 | int status; |
| 791 | |
| 792 | dprintk("NFS call pathconf\n"); |
| 793 | nfs_fattr_init(info->fattr); |
| 794 | status = rpc_call_sync(server->client, &msg, 0); |
| 795 | dprintk("NFS reply pathconf: %d\n", status); |
| 796 | return status; |
| 797 | } |
| 798 | |
| 799 | static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
| 800 | { |
| 801 | struct inode *inode = hdr->inode; |
| 802 | |
| 803 | if (hdr->pgio_done_cb != NULL) |
| 804 | return hdr->pgio_done_cb(task, hdr); |
| 805 | |
| 806 | if (nfs3_async_handle_jukebox(task, inode)) |
| 807 | return -EAGAIN; |
| 808 | |
| 809 | nfs_invalidate_atime(inode); |
| 810 | nfs_refresh_inode(inode, &hdr->fattr); |
| 811 | return 0; |
| 812 | } |
| 813 | |
| 814 | static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr, |
| 815 | struct rpc_message *msg) |
| 816 | { |
| 817 | msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ]; |
| 818 | } |
| 819 | |
| 820 | static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task, |
| 821 | struct nfs_pgio_header *hdr) |
| 822 | { |
| 823 | rpc_call_start(task); |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
| 828 | { |
| 829 | struct inode *inode = hdr->inode; |
| 830 | |
| 831 | if (hdr->pgio_done_cb != NULL) |
| 832 | return hdr->pgio_done_cb(task, hdr); |
| 833 | |
| 834 | if (nfs3_async_handle_jukebox(task, inode)) |
| 835 | return -EAGAIN; |
| 836 | if (task->tk_status >= 0) |
| 837 | nfs_writeback_update_inode(hdr); |
| 838 | return 0; |
| 839 | } |
| 840 | |
| 841 | static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr, |
| 842 | struct rpc_message *msg) |
| 843 | { |
| 844 | msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE]; |
| 845 | } |
| 846 | |
| 847 | static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) |
| 848 | { |
| 849 | rpc_call_start(task); |
| 850 | } |
| 851 | |
| 852 | static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data) |
| 853 | { |
| 854 | if (data->commit_done_cb != NULL) |
| 855 | return data->commit_done_cb(task, data); |
| 856 | |
| 857 | if (nfs3_async_handle_jukebox(task, data->inode)) |
| 858 | return -EAGAIN; |
| 859 | nfs_refresh_inode(data->inode, data->res.fattr); |
| 860 | return 0; |
| 861 | } |
| 862 | |
| 863 | static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) |
| 864 | { |
| 865 | msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT]; |
| 866 | } |
| 867 | |
| 868 | static int |
| 869 | nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) |
| 870 | { |
| 871 | struct inode *inode = file_inode(filp); |
| 872 | |
| 873 | return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); |
| 874 | } |
| 875 | |
| 876 | static int nfs3_have_delegation(struct inode *inode, fmode_t flags) |
| 877 | { |
| 878 | return 0; |
| 879 | } |
| 880 | |
| 881 | static int nfs3_return_delegation(struct inode *inode) |
| 882 | { |
| 883 | nfs_wb_all(inode); |
| 884 | return 0; |
| 885 | } |
| 886 | |
| 887 | static const struct inode_operations nfs3_dir_inode_operations = { |
| 888 | .create = nfs_create, |
| 889 | .lookup = nfs_lookup, |
| 890 | .link = nfs_link, |
| 891 | .unlink = nfs_unlink, |
| 892 | .symlink = nfs_symlink, |
| 893 | .mkdir = nfs_mkdir, |
| 894 | .rmdir = nfs_rmdir, |
| 895 | .mknod = nfs_mknod, |
| 896 | .rename = nfs_rename, |
| 897 | .permission = nfs_permission, |
| 898 | .getattr = nfs_getattr, |
| 899 | .setattr = nfs_setattr, |
| 900 | #ifdef CONFIG_NFS_V3_ACL |
| 901 | .listxattr = nfs3_listxattr, |
| 902 | .getxattr = generic_getxattr, |
| 903 | .setxattr = generic_setxattr, |
| 904 | .removexattr = generic_removexattr, |
| 905 | .get_acl = nfs3_get_acl, |
| 906 | .set_acl = nfs3_set_acl, |
| 907 | #endif |
| 908 | }; |
| 909 | |
| 910 | static const struct inode_operations nfs3_file_inode_operations = { |
| 911 | .permission = nfs_permission, |
| 912 | .getattr = nfs_getattr, |
| 913 | .setattr = nfs_setattr, |
| 914 | #ifdef CONFIG_NFS_V3_ACL |
| 915 | .listxattr = nfs3_listxattr, |
| 916 | .getxattr = generic_getxattr, |
| 917 | .setxattr = generic_setxattr, |
| 918 | .removexattr = generic_removexattr, |
| 919 | .get_acl = nfs3_get_acl, |
| 920 | .set_acl = nfs3_set_acl, |
| 921 | #endif |
| 922 | }; |
| 923 | |
| 924 | const struct nfs_rpc_ops nfs_v3_clientops = { |
| 925 | .version = 3, /* protocol version */ |
| 926 | .dentry_ops = &nfs_dentry_operations, |
| 927 | .dir_inode_ops = &nfs3_dir_inode_operations, |
| 928 | .file_inode_ops = &nfs3_file_inode_operations, |
| 929 | .file_ops = &nfs_file_operations, |
| 930 | .getroot = nfs3_proc_get_root, |
| 931 | .submount = nfs_submount, |
| 932 | .try_mount = nfs_try_mount, |
| 933 | .getattr = nfs3_proc_getattr, |
| 934 | .setattr = nfs3_proc_setattr, |
| 935 | .lookup = nfs3_proc_lookup, |
| 936 | .access = nfs3_proc_access, |
| 937 | .readlink = nfs3_proc_readlink, |
| 938 | .create = nfs3_proc_create, |
| 939 | .remove = nfs3_proc_remove, |
| 940 | .unlink_setup = nfs3_proc_unlink_setup, |
| 941 | .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare, |
| 942 | .unlink_done = nfs3_proc_unlink_done, |
| 943 | .rename_setup = nfs3_proc_rename_setup, |
| 944 | .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare, |
| 945 | .rename_done = nfs3_proc_rename_done, |
| 946 | .link = nfs3_proc_link, |
| 947 | .symlink = nfs3_proc_symlink, |
| 948 | .mkdir = nfs3_proc_mkdir, |
| 949 | .rmdir = nfs3_proc_rmdir, |
| 950 | .readdir = nfs3_proc_readdir, |
| 951 | .mknod = nfs3_proc_mknod, |
| 952 | .statfs = nfs3_proc_statfs, |
| 953 | .fsinfo = nfs3_proc_fsinfo, |
| 954 | .pathconf = nfs3_proc_pathconf, |
| 955 | .decode_dirent = nfs3_decode_dirent, |
| 956 | .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare, |
| 957 | .read_setup = nfs3_proc_read_setup, |
| 958 | .read_done = nfs3_read_done, |
| 959 | .write_setup = nfs3_proc_write_setup, |
| 960 | .write_done = nfs3_write_done, |
| 961 | .commit_setup = nfs3_proc_commit_setup, |
| 962 | .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare, |
| 963 | .commit_done = nfs3_commit_done, |
| 964 | .lock = nfs3_proc_lock, |
| 965 | .clear_acl_cache = forget_all_cached_acls, |
| 966 | .close_context = nfs_close_context, |
| 967 | .have_delegation = nfs3_have_delegation, |
| 968 | .return_delegation = nfs3_return_delegation, |
| 969 | .alloc_client = nfs_alloc_client, |
| 970 | .init_client = nfs_init_client, |
| 971 | .free_client = nfs_free_client, |
| 972 | .create_server = nfs3_create_server, |
| 973 | .clone_server = nfs3_clone_server, |
| 974 | }; |