fs/nfs/nfs3proc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/fs/nfs/nfs3proc.c
   4  *
   5  *  Client-side NFSv3 procedures stubs.
   6  *
   7  *  Copyright (C) 1997, Olaf Kirch
   8  */
   9
  10 #include <linux/mm.h>
  11 #include <linux/errno.h>
  12 #include <linux/string.h>
  13 #include <linux/sunrpc/clnt.h>
  14 #include <linux/slab.h>
  15 #include <linux/nfs.h>
  16 #include <linux/nfs3.h>
  17 #include <linux/nfs_fs.h>
  18 #include <linux/nfs_page.h>
  19 #include <linux/lockd/bind.h>
  20 #include <linux/nfs_mount.h>
  21 #include <linux/freezer.h>
  22 #include <linux/xattr.h>
  23
  24 #include "iostat.h"
  25 #include "internal.h"
  26 #include "nfs3_fs.h"
  27
  28 #define NFSDBG_FACILITY         NFSDBG_PROC
  29
  30 /* A wrapper to handle the EJUKEBOX error messages */
  31 static int
  32 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  33 {
  34         int res;
  35         do {
  36                 res = rpc_call_sync(clnt, msg, flags);
  37                 if (res != -EJUKEBOX)
  38                         break;
  39                 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
  40                 res = -ERESTARTSYS;
  41         } while (!fatal_signal_pending(current));
  42         return res;
  43 }
  44
  45 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  46
  47 static int
  48 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  49 {
  50         if (task->tk_status != -EJUKEBOX)
  51                 return 0;
  52         if (task->tk_status == -EJUKEBOX)
  53                 nfs_inc_stats(inode, NFSIOS_DELAY);
  54         task->tk_status = 0;
  55         rpc_restart_call(task);
  56         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  57         return 1;
  58 }
  59
  60 static int
  61 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  62                  struct nfs_fsinfo *info)
  63 {
  64         struct rpc_message msg = {
  65                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  66                 .rpc_argp       = fhandle,
  67                 .rpc_resp       = info,
  68         };
  69         int     status;
  70
  71         dprintk("%s: call  fsinfo\n", __func__);
  72         nfs_fattr_init(info->fattr);
  73         status = rpc_call_sync(client, &msg, 0);
  74         dprintk("%s: reply fsinfo: %d\n", __func__, status);
  75         if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
  76                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  77                 msg.rpc_resp = info->fattr;
  78                 status = rpc_call_sync(client, &msg, 0);
  79                 dprintk("%s: reply getattr: %d\n", __func__, status);
  80         }
  81         return status;
  82 }
  83
  84 /*
  85  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  86  */
  87 static int
  88 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  89                    struct nfs_fsinfo *info)
  90 {
  91         int     status;
  92
  93         status = do_proc_get_root(server->client, fhandle, info);
  94         if (status && server->nfs_client->cl_rpcclient != server->client)
  95                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  96         return status;
  97 }
  98
  99 /*
 100  * One function for each procedure in the NFS protocol.
 101  */
 102 static int
 103 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 104                 struct nfs_fattr *fattr, struct nfs4_label *label)
 105 {
 106         struct rpc_message msg = {
 107                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 108                 .rpc_argp       = fhandle,
 109                 .rpc_resp       = fattr,
 110         };
 111         int     status;
 112
 113         dprintk("NFS call  getattr\n");
 114         nfs_fattr_init(fattr);
 115         status = rpc_call_sync(server->client, &msg, 0);
 116         dprintk("NFS reply getattr: %d\n", status);
 117         return status;
 118 }
 119
 120 static int
 121 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 122                         struct iattr *sattr)
 123 {
 124         struct inode *inode = d_inode(dentry);
 125         struct nfs3_sattrargs   arg = {
 126                 .fh             = NFS_FH(inode),
 127                 .sattr          = sattr,
 128         };
 129         struct rpc_message msg = {
 130                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 131                 .rpc_argp       = &arg,
 132                 .rpc_resp       = fattr,
 133         };
 134         int     status;
 135
 136         dprintk("NFS call  setattr\n");
 137         if (sattr->ia_valid & ATTR_FILE)
 138                 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 139         nfs_fattr_init(fattr);
 140         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 141         if (status == 0)
 142                 nfs_setattr_update_inode(inode, sattr, fattr);
 143         dprintk("NFS reply setattr: %d\n", status);
 144         return status;
 145 }
 146
 147 static int
 148 nfs3_proc_lookup(struct inode *dir, const struct qstr *name,
 149                  struct nfs_fh *fhandle, struct nfs_fattr *fattr,
 150                  struct nfs4_label *label)
 151 {
 152         struct nfs3_diropargs   arg = {
 153                 .fh             = NFS_FH(dir),
 154                 .name           = name->name,
 155                 .len            = name->len
 156         };
 157         struct nfs3_diropres    res = {
 158                 .fh             = fhandle,
 159                 .fattr          = fattr
 160         };
 161         struct rpc_message msg = {
 162                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 163                 .rpc_argp       = &arg,
 164                 .rpc_resp       = &res,
 165         };
 166         int                     status;
 167
 168         dprintk("NFS call  lookup %s\n", name->name);
 169         res.dir_attr = nfs_alloc_fattr();
 170         if (res.dir_attr == NULL)
 171                 return -ENOMEM;
 172
 173         nfs_fattr_init(fattr);
 174         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 175         nfs_refresh_inode(dir, res.dir_attr);
 176         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 177                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 178                 msg.rpc_argp = fhandle;
 179                 msg.rpc_resp = fattr;
 180                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 181         }
 182         nfs_free_fattr(res.dir_attr);
 183         dprintk("NFS reply lookup: %d\n", status);
 184         return status;
 185 }
 186
 187 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 188 {
 189         struct nfs3_accessargs  arg = {
 190                 .fh             = NFS_FH(inode),
 191                 .access         = entry->mask,
 192         };
 193         struct nfs3_accessres   res;
 194         struct rpc_message msg = {
 195                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 196                 .rpc_argp       = &arg,
 197                 .rpc_resp       = &res,
 198                 .rpc_cred       = entry->cred,
 199         };
 200         int status = -ENOMEM;
 201
 202         dprintk("NFS call  access\n");
 203         res.fattr = nfs_alloc_fattr();
 204         if (res.fattr == NULL)
 205                 goto out;
 206
 207         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 208         nfs_refresh_inode(inode, res.fattr);
 209         if (status == 0)
 210                 nfs_access_set_mask(entry, res.access);
 211         nfs_free_fattr(res.fattr);
 212 out:
 213         dprintk("NFS reply access: %d\n", status);
 214         return status;
 215 }
 216
 217 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 218                 unsigned int pgbase, unsigned int pglen)
 219 {
 220         struct nfs_fattr        *fattr;
 221         struct nfs3_readlinkargs args = {
 222                 .fh             = NFS_FH(inode),
 223                 .pgbase         = pgbase,
 224                 .pglen          = pglen,
 225                 .pages          = &page
 226         };
 227         struct rpc_message msg = {
 228                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 229                 .rpc_argp       = &args,
 230         };
 231         int status = -ENOMEM;
 232
 233         dprintk("NFS call  readlink\n");
 234         fattr = nfs_alloc_fattr();
 235         if (fattr == NULL)
 236                 goto out;
 237         msg.rpc_resp = fattr;
 238
 239         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 240         nfs_refresh_inode(inode, fattr);
 241         nfs_free_fattr(fattr);
 242 out:
 243         dprintk("NFS reply readlink: %d\n", status);
 244         return status;
 245 }
 246
 247 struct nfs3_createdata {
 248         struct rpc_message msg;
 249         union {
 250                 struct nfs3_createargs create;
 251                 struct nfs3_mkdirargs mkdir;
 252                 struct nfs3_symlinkargs symlink;
 253                 struct nfs3_mknodargs mknod;
 254         } arg;
 255         struct nfs3_diropres res;
 256         struct nfs_fh fh;
 257         struct nfs_fattr fattr;
 258         struct nfs_fattr dir_attr;
 259 };
 260
 261 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 262 {
 263         struct nfs3_createdata *data;
 264
 265         data = kzalloc(sizeof(*data), GFP_KERNEL);
 266         if (data != NULL) {
 267                 data->msg.rpc_argp = &data->arg;
 268                 data->msg.rpc_resp = &data->res;
 269                 data->res.fh = &data->fh;
 270                 data->res.fattr = &data->fattr;
 271                 data->res.dir_attr = &data->dir_attr;
 272                 nfs_fattr_init(data->res.fattr);
 273                 nfs_fattr_init(data->res.dir_attr);
 274         }
 275         return data;
 276 }
 277
 278 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 279 {
 280         int status;
 281
 282         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 283         nfs_post_op_update_inode(dir, data->res.dir_attr);
 284         if (status == 0)
 285                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 286         return status;
 287 }
 288
 289 static void nfs3_free_createdata(struct nfs3_createdata *data)
 290 {
 291         kfree(data);
 292 }
 293
 294 /*
 295  * Create a regular file.
 296  */
 297 static int
 298 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 299                  int flags)
 300 {
 301         struct posix_acl *default_acl, *acl;
 302         struct nfs3_createdata *data;
 303         int status = -ENOMEM;
 304
 305         dprintk("NFS call  create %pd\n", dentry);
 306
 307         data = nfs3_alloc_createdata();
 308         if (data == NULL)
 309                 goto out;
 310
 311         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 312         data->arg.create.fh = NFS_FH(dir);
 313         data->arg.create.name = dentry->d_name.name;
 314         data->arg.create.len = dentry->d_name.len;
 315         data->arg.create.sattr = sattr;
 316
 317         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 318         if (flags & O_EXCL) {
 319                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 320                 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
 321                 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
 322         }
 323
 324         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 325         if (status)
 326                 goto out;
 327
 328         for (;;) {
 329                 status = nfs3_do_create(dir, dentry, data);
 330
 331                 if (status != -ENOTSUPP)
 332                         break;
 333                 /* If the server doesn't support the exclusive creation
 334                  * semantics, try again with simple 'guarded' mode. */
 335                 switch (data->arg.create.createmode) {
 336                         case NFS3_CREATE_EXCLUSIVE:
 337                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 338                                 break;
 339
 340                         case NFS3_CREATE_GUARDED:
 341                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 342                                 break;
 343
 344                         case NFS3_CREATE_UNCHECKED:
 345                                 goto out;
 346                 }
 347                 nfs_fattr_init(data->res.dir_attr);
 348                 nfs_fattr_init(data->res.fattr);
 349         }
 350
 351         if (status != 0)
 352                 goto out_release_acls;
 353
 354         /* When we created the file with exclusive semantics, make
 355          * sure we set the attributes afterwards. */
 356         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 357                 dprintk("NFS call  setattr (post-create)\n");
 358
 359                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 360                         sattr->ia_valid |= ATTR_ATIME;
 361                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 362                         sattr->ia_valid |= ATTR_MTIME;
 363
 364                 /* Note: we could use a guarded setattr here, but I'm
 365                  * not sure this buys us anything (and I'd have
 366                  * to revamp the NFSv3 XDR code) */
 367                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 368                 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
 369                 dprintk("NFS reply setattr (post-create): %d\n", status);
 370                 if (status != 0)
 371                         goto out_release_acls;
 372         }
 373
 374         status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
 375
 376 out_release_acls:
 377         posix_acl_release(acl);
 378         posix_acl_release(default_acl);
 379 out:
 380         nfs3_free_createdata(data);
 381         dprintk("NFS reply create: %d\n", status);
 382         return status;
 383 }
 384
 385 static int
 386 nfs3_proc_remove(struct inode *dir, const struct qstr *name)
 387 {
 388         struct nfs_removeargs arg = {
 389                 .fh = NFS_FH(dir),
 390                 .name = *name,
 391         };
 392         struct nfs_removeres res;
 393         struct rpc_message msg = {
 394                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 395                 .rpc_argp = &arg,
 396                 .rpc_resp = &res,
 397         };
 398         int status = -ENOMEM;
 399
 400         dprintk("NFS call  remove %s\n", name->name);
 401         res.dir_attr = nfs_alloc_fattr();
 402         if (res.dir_attr == NULL)
 403                 goto out;
 404
 405         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 406         nfs_post_op_update_inode(dir, res.dir_attr);
 407         nfs_free_fattr(res.dir_attr);
 408 out:
 409         dprintk("NFS reply remove: %d\n", status);
 410         return status;
 411 }
 412
 413 static void
 414 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 415 {
 416         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 417 }
 418
 419 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 420 {
 421         rpc_call_start(task);
 422 }
 423
 424 static int
 425 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 426 {
 427         struct nfs_removeres *res;
 428         if (nfs3_async_handle_jukebox(task, dir))
 429                 return 0;
 430         res = task->tk_msg.rpc_resp;
 431         nfs_post_op_update_inode(dir, res->dir_attr);
 432         return 1;
 433 }
 434
 435 static void
 436 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 437 {
 438         msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 439 }
 440
 441 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
 442 {
 443         rpc_call_start(task);
 444 }
 445
 446 static int
 447 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 448                       struct inode *new_dir)
 449 {
 450         struct nfs_renameres *res;
 451
 452         if (nfs3_async_handle_jukebox(task, old_dir))
 453                 return 0;
 454         res = task->tk_msg.rpc_resp;
 455
 456         nfs_post_op_update_inode(old_dir, res->old_fattr);
 457         nfs_post_op_update_inode(new_dir, res->new_fattr);
 458         return 1;
 459 }
 460
 461 static int
 462 nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
 463 {
 464         struct nfs3_linkargs    arg = {
 465                 .fromfh         = NFS_FH(inode),
 466                 .tofh           = NFS_FH(dir),
 467                 .toname         = name->name,
 468                 .tolen          = name->len
 469         };
 470         struct nfs3_linkres     res;
 471         struct rpc_message msg = {
 472                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 473                 .rpc_argp       = &arg,
 474                 .rpc_resp       = &res,
 475         };
 476         int status = -ENOMEM;
 477
 478         dprintk("NFS call  link %s\n", name->name);
 479         res.fattr = nfs_alloc_fattr();
 480         res.dir_attr = nfs_alloc_fattr();
 481         if (res.fattr == NULL || res.dir_attr == NULL)
 482                 goto out;
 483
 484         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 485         nfs_post_op_update_inode(dir, res.dir_attr);
 486         nfs_post_op_update_inode(inode, res.fattr);
 487 out:
 488         nfs_free_fattr(res.dir_attr);
 489         nfs_free_fattr(res.fattr);
 490         dprintk("NFS reply link: %d\n", status);
 491         return status;
 492 }
 493
 494 static int
 495 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 496                   unsigned int len, struct iattr *sattr)
 497 {
 498         struct nfs3_createdata *data;
 499         int status = -ENOMEM;
 500
 501         if (len > NFS3_MAXPATHLEN)
 502                 return -ENAMETOOLONG;
 503
 504         dprintk("NFS call  symlink %pd\n", dentry);
 505
 506         data = nfs3_alloc_createdata();
 507         if (data == NULL)
 508                 goto out;
 509         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 510         data->arg.symlink.fromfh = NFS_FH(dir);
 511         data->arg.symlink.fromname = dentry->d_name.name;
 512         data->arg.symlink.fromlen = dentry->d_name.len;
 513         data->arg.symlink.pages = &page;
 514         data->arg.symlink.pathlen = len;
 515         data->arg.symlink.sattr = sattr;
 516
 517         status = nfs3_do_create(dir, dentry, data);
 518
 519         nfs3_free_createdata(data);
 520 out:
 521         dprintk("NFS reply symlink: %d\n", status);
 522         return status;
 523 }
 524
 525 static int
 526 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 527 {
 528         struct posix_acl *default_acl, *acl;
 529         struct nfs3_createdata *data;
 530         int status = -ENOMEM;
 531
 532         dprintk("NFS call  mkdir %pd\n", dentry);
 533
 534         data = nfs3_alloc_createdata();
 535         if (data == NULL)
 536                 goto out;
 537
 538         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 539         if (status)
 540                 goto out;
 541
 542         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 543         data->arg.mkdir.fh = NFS_FH(dir);
 544         data->arg.mkdir.name = dentry->d_name.name;
 545         data->arg.mkdir.len = dentry->d_name.len;
 546         data->arg.mkdir.sattr = sattr;
 547
 548         status = nfs3_do_create(dir, dentry, data);
 549         if (status != 0)
 550                 goto out_release_acls;
 551
 552         status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
 553
 554 out_release_acls:
 555         posix_acl_release(acl);
 556         posix_acl_release(default_acl);
 557 out:
 558         nfs3_free_createdata(data);
 559         dprintk("NFS reply mkdir: %d\n", status);
 560         return status;
 561 }
 562
 563 static int
 564 nfs3_proc_rmdir(struct inode *dir, const struct qstr *name)
 565 {
 566         struct nfs_fattr        *dir_attr;
 567         struct nfs3_diropargs   arg = {
 568                 .fh             = NFS_FH(dir),
 569                 .name           = name->name,
 570                 .len            = name->len
 571         };
 572         struct rpc_message msg = {
 573                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 574                 .rpc_argp       = &arg,
 575         };
 576         int status = -ENOMEM;
 577
 578         dprintk("NFS call  rmdir %s\n", name->name);
 579         dir_attr = nfs_alloc_fattr();
 580         if (dir_attr == NULL)
 581                 goto out;
 582
 583         msg.rpc_resp = dir_attr;
 584         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 585         nfs_post_op_update_inode(dir, dir_attr);
 586         nfs_free_fattr(dir_attr);
 587 out:
 588         dprintk("NFS reply rmdir: %d\n", status);
 589         return status;
 590 }
 591
 592 /*
 593  * The READDIR implementation is somewhat hackish - we pass the user buffer
 594  * to the encode function, which installs it in the receive iovec.
 595  * The decode function itself doesn't perform any decoding, it just makes
 596  * sure the reply is syntactically correct.
 597  *
 598  * Also note that this implementation handles both plain readdir and
 599  * readdirplus.
 600  */
 601 static int
 602 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 603                   u64 cookie, struct page **pages, unsigned int count, bool plus)
 604 {
 605         struct inode            *dir = d_inode(dentry);
 606         __be32                  *verf = NFS_I(dir)->cookieverf;
 607         struct nfs3_readdirargs arg = {
 608                 .fh             = NFS_FH(dir),
 609                 .cookie         = cookie,
 610                 .verf           = {verf[0], verf[1]},
 611                 .plus           = plus,
 612                 .count          = count,
 613                 .pages          = pages
 614         };
 615         struct nfs3_readdirres  res = {
 616                 .verf           = verf,
 617                 .plus           = plus
 618         };
 619         struct rpc_message      msg = {
 620                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 621                 .rpc_argp       = &arg,
 622                 .rpc_resp       = &res,
 623                 .rpc_cred       = cred
 624         };
 625         int status = -ENOMEM;
 626
 627         if (plus)
 628                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 629
 630         dprintk("NFS call  readdir%s %d\n",
 631                         plus? "plus" : "", (unsigned int) cookie);
 632
 633         res.dir_attr = nfs_alloc_fattr();
 634         if (res.dir_attr == NULL)
 635                 goto out;
 636
 637         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 638
 639         nfs_invalidate_atime(dir);
 640         nfs_refresh_inode(dir, res.dir_attr);
 641
 642         nfs_free_fattr(res.dir_attr);
 643 out:
 644         dprintk("NFS reply readdir%s: %d\n",
 645                         plus? "plus" : "", status);
 646         return status;
 647 }
 648
 649 static int
 650 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 651                 dev_t rdev)
 652 {
 653         struct posix_acl *default_acl, *acl;
 654         struct nfs3_createdata *data;
 655         int status = -ENOMEM;
 656
 657         dprintk("NFS call  mknod %pd %u:%u\n", dentry,
 658                         MAJOR(rdev), MINOR(rdev));
 659
 660         data = nfs3_alloc_createdata();
 661         if (data == NULL)
 662                 goto out;
 663
 664         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 665         if (status)
 666                 goto out;
 667
 668         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 669         data->arg.mknod.fh = NFS_FH(dir);
 670         data->arg.mknod.name = dentry->d_name.name;
 671         data->arg.mknod.len = dentry->d_name.len;
 672         data->arg.mknod.sattr = sattr;
 673         data->arg.mknod.rdev = rdev;
 674
 675         switch (sattr->ia_mode & S_IFMT) {
 676         case S_IFBLK:
 677                 data->arg.mknod.type = NF3BLK;
 678                 break;
 679         case S_IFCHR:
 680                 data->arg.mknod.type = NF3CHR;
 681                 break;
 682         case S_IFIFO:
 683                 data->arg.mknod.type = NF3FIFO;
 684                 break;
 685         case S_IFSOCK:
 686                 data->arg.mknod.type = NF3SOCK;
 687                 break;
 688         default:
 689                 status = -EINVAL;
 690                 goto out;
 691         }
 692
 693         status = nfs3_do_create(dir, dentry, data);
 694         if (status != 0)
 695                 goto out_release_acls;
 696
 697         status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
 698
 699 out_release_acls:
 700         posix_acl_release(acl);
 701         posix_acl_release(default_acl);
 702 out:
 703         nfs3_free_createdata(data);
 704         dprintk("NFS reply mknod: %d\n", status);
 705         return status;
 706 }
 707
 708 static int
 709 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 710                  struct nfs_fsstat *stat)
 711 {
 712         struct rpc_message msg = {
 713                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 714                 .rpc_argp       = fhandle,
 715                 .rpc_resp       = stat,
 716         };
 717         int     status;
 718
 719         dprintk("NFS call  fsstat\n");
 720         nfs_fattr_init(stat->fattr);
 721         status = rpc_call_sync(server->client, &msg, 0);
 722         dprintk("NFS reply fsstat: %d\n", status);
 723         return status;
 724 }
 725
 726 static int
 727 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 728                  struct nfs_fsinfo *info)
 729 {
 730         struct rpc_message msg = {
 731                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 732                 .rpc_argp       = fhandle,
 733                 .rpc_resp       = info,
 734         };
 735         int     status;
 736
 737         dprintk("NFS call  fsinfo\n");
 738         nfs_fattr_init(info->fattr);
 739         status = rpc_call_sync(client, &msg, 0);
 740         dprintk("NFS reply fsinfo: %d\n", status);
 741         return status;
 742 }
 743
 744 /*
 745  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 746  * nfs_create_server
 747  */
 748 static int
 749 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 750                    struct nfs_fsinfo *info)
 751 {
 752         int     status;
 753
 754         status = do_proc_fsinfo(server->client, fhandle, info);
 755         if (status && server->nfs_client->cl_rpcclient != server->client)
 756                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 757         return status;
 758 }
 759
 760 static int
 761 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 762                    struct nfs_pathconf *info)
 763 {
 764         struct rpc_message msg = {
 765                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 766                 .rpc_argp       = fhandle,
 767                 .rpc_resp       = info,
 768         };
 769         int     status;
 770
 771         dprintk("NFS call  pathconf\n");
 772         nfs_fattr_init(info->fattr);
 773         status = rpc_call_sync(server->client, &msg, 0);
 774         dprintk("NFS reply pathconf: %d\n", status);
 775         return status;
 776 }
 777
 778 static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 779 {
 780         struct inode *inode = hdr->inode;
 781
 782         if (hdr->pgio_done_cb != NULL)
 783                 return hdr->pgio_done_cb(task, hdr);
 784
 785         if (nfs3_async_handle_jukebox(task, inode))
 786                 return -EAGAIN;
 787
 788         nfs_invalidate_atime(inode);
 789         nfs_refresh_inode(inode, &hdr->fattr);
 790         return 0;
 791 }
 792
 793 static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
 794                                  struct rpc_message *msg)
 795 {
 796         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 797 }
 798
 799 static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
 800                                       struct nfs_pgio_header *hdr)
 801 {
 802         rpc_call_start(task);
 803         return 0;
 804 }
 805
 806 static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 807 {
 808         struct inode *inode = hdr->inode;
 809
 810         if (hdr->pgio_done_cb != NULL)
 811                 return hdr->pgio_done_cb(task, hdr);
 812
 813         if (nfs3_async_handle_jukebox(task, inode))
 814                 return -EAGAIN;
 815         if (task->tk_status >= 0)
 816                 nfs_writeback_update_inode(hdr);
 817         return 0;
 818 }
 819
 820 static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
 821                                   struct rpc_message *msg)
 822 {
 823         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 824 }
 825
 826 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
 827 {
 828         rpc_call_start(task);
 829 }
 830
 831 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
 832 {
 833         if (data->commit_done_cb != NULL)
 834                 return data->commit_done_cb(task, data);
 835
 836         if (nfs3_async_handle_jukebox(task, data->inode))
 837                 return -EAGAIN;
 838         nfs_refresh_inode(data->inode, data->res.fattr);
 839         return 0;
 840 }
 841
 842 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
 843 {
 844         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 845 }
 846
 847 static void nfs3_nlm_alloc_call(void *data)
 848 {
 849         struct nfs_lock_context *l_ctx = data;
 850         if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
 851                 get_nfs_open_context(l_ctx->open_context);
 852                 nfs_get_lock_context(l_ctx->open_context);
 853         }
 854 }
 855
 856 static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data)
 857 {
 858         struct nfs_lock_context *l_ctx = data;
 859         if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags))
 860                 return nfs_async_iocounter_wait(task, l_ctx);
 861         return false;
 862
 863 }
 864
 865 static void nfs3_nlm_release_call(void *data)
 866 {
 867         struct nfs_lock_context *l_ctx = data;
 868         struct nfs_open_context *ctx;
 869         if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
 870                 ctx = l_ctx->open_context;
 871                 nfs_put_lock_context(l_ctx);
 872                 put_nfs_open_context(ctx);
 873         }
 874 }
 875
 876 static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = {
 877         .nlmclnt_alloc_call = nfs3_nlm_alloc_call,
 878         .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare,
 879         .nlmclnt_release_call = nfs3_nlm_release_call,
 880 };
 881
 882 static int
 883 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 884 {
 885         struct inode *inode = file_inode(filp);
 886         struct nfs_lock_context *l_ctx = NULL;
 887         struct nfs_open_context *ctx = nfs_file_open_context(filp);
 888         int status;
 889
 890         if (fl->fl_flags & FL_CLOSE) {
 891                 l_ctx = nfs_get_lock_context(ctx);
 892                 if (IS_ERR(l_ctx))
 893                         l_ctx = NULL;
 894                 else
 895                         set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
 896         }
 897
 898         status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx);
 899
 900         if (l_ctx)
 901                 nfs_put_lock_context(l_ctx);
 902
 903         return status;
 904 }
 905
 906 static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
 907 {
 908         return 0;
 909 }
 910
 911 static int nfs3_return_delegation(struct inode *inode)
 912 {
 913         nfs_wb_all(inode);
 914         return 0;
 915 }
 916
 917 static const struct inode_operations nfs3_dir_inode_operations = {
 918         .create         = nfs_create,
 919         .lookup         = nfs_lookup,
 920         .link           = nfs_link,
 921         .unlink         = nfs_unlink,
 922         .symlink        = nfs_symlink,
 923         .mkdir          = nfs_mkdir,
 924         .rmdir          = nfs_rmdir,
 925         .mknod          = nfs_mknod,
 926         .rename         = nfs_rename,
 927         .permission     = nfs_permission,
 928         .getattr        = nfs_getattr,
 929         .setattr        = nfs_setattr,
 930 #ifdef CONFIG_NFS_V3_ACL
 931         .listxattr      = nfs3_listxattr,
 932         .get_acl        = nfs3_get_acl,
 933         .set_acl        = nfs3_set_acl,
 934 #endif
 935 };
 936
 937 static const struct inode_operations nfs3_file_inode_operations = {
 938         .permission     = nfs_permission,
 939         .getattr        = nfs_getattr,
 940         .setattr        = nfs_setattr,
 941 #ifdef CONFIG_NFS_V3_ACL
 942         .listxattr      = nfs3_listxattr,
 943         .get_acl        = nfs3_get_acl,
 944         .set_acl        = nfs3_set_acl,
 945 #endif
 946 };
 947
 948 const struct nfs_rpc_ops nfs_v3_clientops = {
 949         .version        = 3,                    /* protocol version */
 950         .dentry_ops     = &nfs_dentry_operations,
 951         .dir_inode_ops  = &nfs3_dir_inode_operations,
 952         .file_inode_ops = &nfs3_file_inode_operations,
 953         .file_ops       = &nfs_file_operations,
 954         .nlmclnt_ops    = &nlmclnt_fl_close_lock_ops,
 955         .getroot        = nfs3_proc_get_root,
 956         .submount       = nfs_submount,
 957         .try_mount      = nfs_try_mount,
 958         .getattr        = nfs3_proc_getattr,
 959         .setattr        = nfs3_proc_setattr,
 960         .lookup         = nfs3_proc_lookup,
 961         .access         = nfs3_proc_access,
 962         .readlink       = nfs3_proc_readlink,
 963         .create         = nfs3_proc_create,
 964         .remove         = nfs3_proc_remove,
 965         .unlink_setup   = nfs3_proc_unlink_setup,
 966         .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
 967         .unlink_done    = nfs3_proc_unlink_done,
 968         .rename_setup   = nfs3_proc_rename_setup,
 969         .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
 970         .rename_done    = nfs3_proc_rename_done,
 971         .link           = nfs3_proc_link,
 972         .symlink        = nfs3_proc_symlink,
 973         .mkdir          = nfs3_proc_mkdir,
 974         .rmdir          = nfs3_proc_rmdir,
 975         .readdir        = nfs3_proc_readdir,
 976         .mknod          = nfs3_proc_mknod,
 977         .statfs         = nfs3_proc_statfs,
 978         .fsinfo         = nfs3_proc_fsinfo,
 979         .pathconf       = nfs3_proc_pathconf,
 980         .decode_dirent  = nfs3_decode_dirent,
 981         .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
 982         .read_setup     = nfs3_proc_read_setup,
 983         .read_done      = nfs3_read_done,
 984         .write_setup    = nfs3_proc_write_setup,
 985         .write_done     = nfs3_write_done,
 986         .commit_setup   = nfs3_proc_commit_setup,
 987         .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
 988         .commit_done    = nfs3_commit_done,
 989         .lock           = nfs3_proc_lock,
 990         .clear_acl_cache = forget_all_cached_acls,
 991         .close_context  = nfs_close_context,
 992         .have_delegation = nfs3_have_delegation,
 993         .return_delegation = nfs3_return_delegation,
 994         .alloc_client   = nfs_alloc_client,
 995         .init_client    = nfs_init_client,
 996         .free_client    = nfs_free_client,
 997         .create_server  = nfs3_create_server,
 998         .clone_server   = nfs3_clone_server,
 999 };