linux/fs/nfs/nfs3proc.c
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   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
  22#include "iostat.h"
  23#include "internal.h"
  24
  25#define NFSDBG_FACILITY         NFSDBG_PROC
  26
  27/* A wrapper to handle the EJUKEBOX and EKEYEXPIRED error messages */
  28static int
  29nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  30{
  31        int res;
  32        do {
  33                res = rpc_call_sync(clnt, msg, flags);
  34                if (res != -EJUKEBOX && res != -EKEYEXPIRED)
  35                        break;
  36                freezable_schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
  37                res = -ERESTARTSYS;
  38        } while (!fatal_signal_pending(current));
  39        return res;
  40}
  41
  42#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  43
  44static int
  45nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  46{
  47        if (task->tk_status != -EJUKEBOX && task->tk_status != -EKEYEXPIRED)
  48                return 0;
  49        if (task->tk_status == -EJUKEBOX)
  50                nfs_inc_stats(inode, NFSIOS_DELAY);
  51        task->tk_status = 0;
  52        rpc_restart_call(task);
  53        rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  54        return 1;
  55}
  56
  57static int
  58do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  59                 struct nfs_fsinfo *info)
  60{
  61        struct rpc_message msg = {
  62                .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  63                .rpc_argp       = fhandle,
  64                .rpc_resp       = info,
  65        };
  66        int     status;
  67
  68        dprintk("%s: call  fsinfo\n", __func__);
  69        nfs_fattr_init(info->fattr);
  70        status = rpc_call_sync(client, &msg, 0);
  71        dprintk("%s: reply fsinfo: %d\n", __func__, status);
  72        if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
  73                msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  74                msg.rpc_resp = info->fattr;
  75                status = rpc_call_sync(client, &msg, 0);
  76                dprintk("%s: reply getattr: %d\n", __func__, status);
  77        }
  78        return status;
  79}
  80
  81/*
  82 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  83 */
  84static int
  85nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  86                   struct nfs_fsinfo *info)
  87{
  88        int     status;
  89
  90        status = do_proc_get_root(server->client, fhandle, info);
  91        if (status && server->nfs_client->cl_rpcclient != server->client)
  92                status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  93        return status;
  94}
  95
  96/*
  97 * One function for each procedure in the NFS protocol.
  98 */
  99static int
 100nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 101                struct nfs_fattr *fattr)
 102{
 103        struct rpc_message msg = {
 104                .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 105                .rpc_argp       = fhandle,
 106                .rpc_resp       = fattr,
 107        };
 108        int     status;
 109
 110        dprintk("NFS call  getattr\n");
 111        nfs_fattr_init(fattr);
 112        status = rpc_call_sync(server->client, &msg, 0);
 113        dprintk("NFS reply getattr: %d\n", status);
 114        return status;
 115}
 116
 117static int
 118nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 119                        struct iattr *sattr)
 120{
 121        struct inode *inode = dentry->d_inode;
 122        struct nfs3_sattrargs   arg = {
 123                .fh             = NFS_FH(inode),
 124                .sattr          = sattr,
 125        };
 126        struct rpc_message msg = {
 127                .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 128                .rpc_argp       = &arg,
 129                .rpc_resp       = fattr,
 130        };
 131        int     status;
 132
 133        dprintk("NFS call  setattr\n");
 134        if (sattr->ia_valid & ATTR_FILE)
 135                msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 136        nfs_fattr_init(fattr);
 137        status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 138        if (status == 0)
 139                nfs_setattr_update_inode(inode, sattr);
 140        dprintk("NFS reply setattr: %d\n", status);
 141        return status;
 142}
 143
 144static int
 145nfs3_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
 146                 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 147{
 148        struct nfs3_diropargs   arg = {
 149                .fh             = NFS_FH(dir),
 150                .name           = name->name,
 151                .len            = name->len
 152        };
 153        struct nfs3_diropres    res = {
 154                .fh             = fhandle,
 155                .fattr          = fattr
 156        };
 157        struct rpc_message msg = {
 158                .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 159                .rpc_argp       = &arg,
 160                .rpc_resp       = &res,
 161        };
 162        int                     status;
 163
 164        dprintk("NFS call  lookup %s\n", name->name);
 165        res.dir_attr = nfs_alloc_fattr();
 166        if (res.dir_attr == NULL)
 167                return -ENOMEM;
 168
 169        nfs_fattr_init(fattr);
 170        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 171        nfs_refresh_inode(dir, res.dir_attr);
 172        if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 173                msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 174                msg.rpc_argp = fhandle;
 175                msg.rpc_resp = fattr;
 176                status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 177        }
 178        nfs_free_fattr(res.dir_attr);
 179        dprintk("NFS reply lookup: %d\n", status);
 180        return status;
 181}
 182
 183static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 184{
 185        struct nfs3_accessargs  arg = {
 186                .fh             = NFS_FH(inode),
 187        };
 188        struct nfs3_accessres   res;
 189        struct rpc_message msg = {
 190                .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 191                .rpc_argp       = &arg,
 192                .rpc_resp       = &res,
 193                .rpc_cred       = entry->cred,
 194        };
 195        int mode = entry->mask;
 196        int status = -ENOMEM;
 197
 198        dprintk("NFS call  access\n");
 199
 200        if (mode & MAY_READ)
 201                arg.access |= NFS3_ACCESS_READ;
 202        if (S_ISDIR(inode->i_mode)) {
 203                if (mode & MAY_WRITE)
 204                        arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 205                if (mode & MAY_EXEC)
 206                        arg.access |= NFS3_ACCESS_LOOKUP;
 207        } else {
 208                if (mode & MAY_WRITE)
 209                        arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 210                if (mode & MAY_EXEC)
 211                        arg.access |= NFS3_ACCESS_EXECUTE;
 212        }
 213
 214        res.fattr = nfs_alloc_fattr();
 215        if (res.fattr == NULL)
 216                goto out;
 217
 218        status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 219        nfs_refresh_inode(inode, res.fattr);
 220        if (status == 0) {
 221                entry->mask = 0;
 222                if (res.access & NFS3_ACCESS_READ)
 223                        entry->mask |= MAY_READ;
 224                if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 225                        entry->mask |= MAY_WRITE;
 226                if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 227                        entry->mask |= MAY_EXEC;
 228        }
 229        nfs_free_fattr(res.fattr);
 230out:
 231        dprintk("NFS reply access: %d\n", status);
 232        return status;
 233}
 234
 235static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 236                unsigned int pgbase, unsigned int pglen)
 237{
 238        struct nfs_fattr        *fattr;
 239        struct nfs3_readlinkargs args = {
 240                .fh             = NFS_FH(inode),
 241                .pgbase         = pgbase,
 242                .pglen          = pglen,
 243                .pages          = &page
 244        };
 245        struct rpc_message msg = {
 246                .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 247                .rpc_argp       = &args,
 248        };
 249        int status = -ENOMEM;
 250
 251        dprintk("NFS call  readlink\n");
 252        fattr = nfs_alloc_fattr();
 253        if (fattr == NULL)
 254                goto out;
 255        msg.rpc_resp = fattr;
 256
 257        status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 258        nfs_refresh_inode(inode, fattr);
 259        nfs_free_fattr(fattr);
 260out:
 261        dprintk("NFS reply readlink: %d\n", status);
 262        return status;
 263}
 264
 265struct nfs3_createdata {
 266        struct rpc_message msg;
 267        union {
 268                struct nfs3_createargs create;
 269                struct nfs3_mkdirargs mkdir;
 270                struct nfs3_symlinkargs symlink;
 271                struct nfs3_mknodargs mknod;
 272        } arg;
 273        struct nfs3_diropres res;
 274        struct nfs_fh fh;
 275        struct nfs_fattr fattr;
 276        struct nfs_fattr dir_attr;
 277};
 278
 279static struct nfs3_createdata *nfs3_alloc_createdata(void)
 280{
 281        struct nfs3_createdata *data;
 282
 283        data = kzalloc(sizeof(*data), GFP_KERNEL);
 284        if (data != NULL) {
 285                data->msg.rpc_argp = &data->arg;
 286                data->msg.rpc_resp = &data->res;
 287                data->res.fh = &data->fh;
 288                data->res.fattr = &data->fattr;
 289                data->res.dir_attr = &data->dir_attr;
 290                nfs_fattr_init(data->res.fattr);
 291                nfs_fattr_init(data->res.dir_attr);
 292        }
 293        return data;
 294}
 295
 296static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 297{
 298        int status;
 299
 300        status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 301        nfs_post_op_update_inode(dir, data->res.dir_attr);
 302        if (status == 0)
 303                status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
 304        return status;
 305}
 306
 307static void nfs3_free_createdata(struct nfs3_createdata *data)
 308{
 309        kfree(data);
 310}
 311
 312/*
 313 * Create a regular file.
 314 */
 315static int
 316nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 317                 int flags, struct nfs_open_context *ctx)
 318{
 319        struct nfs3_createdata *data;
 320        umode_t mode = sattr->ia_mode;
 321        int status = -ENOMEM;
 322
 323        dprintk("NFS call  create %s\n", dentry->d_name.name);
 324
 325        data = nfs3_alloc_createdata();
 326        if (data == NULL)
 327                goto out;
 328
 329        data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 330        data->arg.create.fh = NFS_FH(dir);
 331        data->arg.create.name = dentry->d_name.name;
 332        data->arg.create.len = dentry->d_name.len;
 333        data->arg.create.sattr = sattr;
 334
 335        data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 336        if (flags & O_EXCL) {
 337                data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 338                data->arg.create.verifier[0] = jiffies;
 339                data->arg.create.verifier[1] = current->pid;
 340        }
 341
 342        sattr->ia_mode &= ~current_umask();
 343
 344        for (;;) {
 345                status = nfs3_do_create(dir, dentry, data);
 346
 347                if (status != -ENOTSUPP)
 348                        break;
 349                /* If the server doesn't support the exclusive creation
 350                 * semantics, try again with simple 'guarded' mode. */
 351                switch (data->arg.create.createmode) {
 352                        case NFS3_CREATE_EXCLUSIVE:
 353                                data->arg.create.createmode = NFS3_CREATE_GUARDED;
 354                                break;
 355
 356                        case NFS3_CREATE_GUARDED:
 357                                data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 358                                break;
 359
 360                        case NFS3_CREATE_UNCHECKED:
 361                                goto out;
 362                }
 363                nfs_fattr_init(data->res.dir_attr);
 364                nfs_fattr_init(data->res.fattr);
 365        }
 366
 367        if (status != 0)
 368                goto out;
 369
 370        /* When we created the file with exclusive semantics, make
 371         * sure we set the attributes afterwards. */
 372        if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 373                dprintk("NFS call  setattr (post-create)\n");
 374
 375                if (!(sattr->ia_valid & ATTR_ATIME_SET))
 376                        sattr->ia_valid |= ATTR_ATIME;
 377                if (!(sattr->ia_valid & ATTR_MTIME_SET))
 378                        sattr->ia_valid |= ATTR_MTIME;
 379
 380                /* Note: we could use a guarded setattr here, but I'm
 381                 * not sure this buys us anything (and I'd have
 382                 * to revamp the NFSv3 XDR code) */
 383                status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 384                nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 385                dprintk("NFS reply setattr (post-create): %d\n", status);
 386                if (status != 0)
 387                        goto out;
 388        }
 389        status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 390out:
 391        nfs3_free_createdata(data);
 392        dprintk("NFS reply create: %d\n", status);
 393        return status;
 394}
 395
 396static int
 397nfs3_proc_remove(struct inode *dir, struct qstr *name)
 398{
 399        struct nfs_removeargs arg = {
 400                .fh = NFS_FH(dir),
 401                .name.len = name->len,
 402                .name.name = name->name,
 403        };
 404        struct nfs_removeres res;
 405        struct rpc_message msg = {
 406                .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 407                .rpc_argp = &arg,
 408                .rpc_resp = &res,
 409        };
 410        int status = -ENOMEM;
 411
 412        dprintk("NFS call  remove %s\n", name->name);
 413        res.dir_attr = nfs_alloc_fattr();
 414        if (res.dir_attr == NULL)
 415                goto out;
 416
 417        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 418        nfs_post_op_update_inode(dir, res.dir_attr);
 419        nfs_free_fattr(res.dir_attr);
 420out:
 421        dprintk("NFS reply remove: %d\n", status);
 422        return status;
 423}
 424
 425static void
 426nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 427{
 428        msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 429}
 430
 431static int
 432nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 433{
 434        struct nfs_removeres *res;
 435        if (nfs3_async_handle_jukebox(task, dir))
 436                return 0;
 437        res = task->tk_msg.rpc_resp;
 438        nfs_post_op_update_inode(dir, res->dir_attr);
 439        return 1;
 440}
 441
 442static void
 443nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 444{
 445        msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 446}
 447
 448static int
 449nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 450                      struct inode *new_dir)
 451{
 452        struct nfs_renameres *res;
 453
 454        if (nfs3_async_handle_jukebox(task, old_dir))
 455                return 0;
 456        res = task->tk_msg.rpc_resp;
 457
 458        nfs_post_op_update_inode(old_dir, res->old_fattr);
 459        nfs_post_op_update_inode(new_dir, res->new_fattr);
 460        return 1;
 461}
 462
 463static int
 464nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 465                 struct inode *new_dir, struct qstr *new_name)
 466{
 467        struct nfs_renameargs   arg = {
 468                .old_dir        = NFS_FH(old_dir),
 469                .old_name       = old_name,
 470                .new_dir        = NFS_FH(new_dir),
 471                .new_name       = new_name,
 472        };
 473        struct nfs_renameres res;
 474        struct rpc_message msg = {
 475                .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 476                .rpc_argp       = &arg,
 477                .rpc_resp       = &res,
 478        };
 479        int status = -ENOMEM;
 480
 481        dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 482
 483        res.old_fattr = nfs_alloc_fattr();
 484        res.new_fattr = nfs_alloc_fattr();
 485        if (res.old_fattr == NULL || res.new_fattr == NULL)
 486                goto out;
 487
 488        status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 489        nfs_post_op_update_inode(old_dir, res.old_fattr);
 490        nfs_post_op_update_inode(new_dir, res.new_fattr);
 491out:
 492        nfs_free_fattr(res.old_fattr);
 493        nfs_free_fattr(res.new_fattr);
 494        dprintk("NFS reply rename: %d\n", status);
 495        return status;
 496}
 497
 498static int
 499nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 500{
 501        struct nfs3_linkargs    arg = {
 502                .fromfh         = NFS_FH(inode),
 503                .tofh           = NFS_FH(dir),
 504                .toname         = name->name,
 505                .tolen          = name->len
 506        };
 507        struct nfs3_linkres     res;
 508        struct rpc_message msg = {
 509                .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 510                .rpc_argp       = &arg,
 511                .rpc_resp       = &res,
 512        };
 513        int status = -ENOMEM;
 514
 515        dprintk("NFS call  link %s\n", name->name);
 516        res.fattr = nfs_alloc_fattr();
 517        res.dir_attr = nfs_alloc_fattr();
 518        if (res.fattr == NULL || res.dir_attr == NULL)
 519                goto out;
 520
 521        status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 522        nfs_post_op_update_inode(dir, res.dir_attr);
 523        nfs_post_op_update_inode(inode, res.fattr);
 524out:
 525        nfs_free_fattr(res.dir_attr);
 526        nfs_free_fattr(res.fattr);
 527        dprintk("NFS reply link: %d\n", status);
 528        return status;
 529}
 530
 531static int
 532nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 533                  unsigned int len, struct iattr *sattr)
 534{
 535        struct nfs3_createdata *data;
 536        int status = -ENOMEM;
 537
 538        if (len > NFS3_MAXPATHLEN)
 539                return -ENAMETOOLONG;
 540
 541        dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 542
 543        data = nfs3_alloc_createdata();
 544        if (data == NULL)
 545                goto out;
 546        data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 547        data->arg.symlink.fromfh = NFS_FH(dir);
 548        data->arg.symlink.fromname = dentry->d_name.name;
 549        data->arg.symlink.fromlen = dentry->d_name.len;
 550        data->arg.symlink.pages = &page;
 551        data->arg.symlink.pathlen = len;
 552        data->arg.symlink.sattr = sattr;
 553
 554        status = nfs3_do_create(dir, dentry, data);
 555
 556        nfs3_free_createdata(data);
 557out:
 558        dprintk("NFS reply symlink: %d\n", status);
 559        return status;
 560}
 561
 562static int
 563nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 564{
 565        struct nfs3_createdata *data;
 566        umode_t mode = sattr->ia_mode;
 567        int status = -ENOMEM;
 568
 569        dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 570
 571        sattr->ia_mode &= ~current_umask();
 572
 573        data = nfs3_alloc_createdata();
 574        if (data == NULL)
 575                goto out;
 576
 577        data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 578        data->arg.mkdir.fh = NFS_FH(dir);
 579        data->arg.mkdir.name = dentry->d_name.name;
 580        data->arg.mkdir.len = dentry->d_name.len;
 581        data->arg.mkdir.sattr = sattr;
 582
 583        status = nfs3_do_create(dir, dentry, data);
 584        if (status != 0)
 585                goto out;
 586
 587        status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 588out:
 589        nfs3_free_createdata(data);
 590        dprintk("NFS reply mkdir: %d\n", status);
 591        return status;
 592}
 593
 594static int
 595nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 596{
 597        struct nfs_fattr        *dir_attr;
 598        struct nfs3_diropargs   arg = {
 599                .fh             = NFS_FH(dir),
 600                .name           = name->name,
 601                .len            = name->len
 602        };
 603        struct rpc_message msg = {
 604                .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 605                .rpc_argp       = &arg,
 606        };
 607        int status = -ENOMEM;
 608
 609        dprintk("NFS call  rmdir %s\n", name->name);
 610        dir_attr = nfs_alloc_fattr();
 611        if (dir_attr == NULL)
 612                goto out;
 613
 614        msg.rpc_resp = dir_attr;
 615        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 616        nfs_post_op_update_inode(dir, dir_attr);
 617        nfs_free_fattr(dir_attr);
 618out:
 619        dprintk("NFS reply rmdir: %d\n", status);
 620        return status;
 621}
 622
 623/*
 624 * The READDIR implementation is somewhat hackish - we pass the user buffer
 625 * to the encode function, which installs it in the receive iovec.
 626 * The decode function itself doesn't perform any decoding, it just makes
 627 * sure the reply is syntactically correct.
 628 *
 629 * Also note that this implementation handles both plain readdir and
 630 * readdirplus.
 631 */
 632static int
 633nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 634                  u64 cookie, struct page **pages, unsigned int count, int plus)
 635{
 636        struct inode            *dir = dentry->d_inode;
 637        __be32                  *verf = NFS_COOKIEVERF(dir);
 638        struct nfs3_readdirargs arg = {
 639                .fh             = NFS_FH(dir),
 640                .cookie         = cookie,
 641                .verf           = {verf[0], verf[1]},
 642                .plus           = plus,
 643                .count          = count,
 644                .pages          = pages
 645        };
 646        struct nfs3_readdirres  res = {
 647                .verf           = verf,
 648                .plus           = plus
 649        };
 650        struct rpc_message      msg = {
 651                .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 652                .rpc_argp       = &arg,
 653                .rpc_resp       = &res,
 654                .rpc_cred       = cred
 655        };
 656        int status = -ENOMEM;
 657
 658        if (plus)
 659                msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 660
 661        dprintk("NFS call  readdir%s %d\n",
 662                        plus? "plus" : "", (unsigned int) cookie);
 663
 664        res.dir_attr = nfs_alloc_fattr();
 665        if (res.dir_attr == NULL)
 666                goto out;
 667
 668        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 669
 670        nfs_invalidate_atime(dir);
 671        nfs_refresh_inode(dir, res.dir_attr);
 672
 673        nfs_free_fattr(res.dir_attr);
 674out:
 675        dprintk("NFS reply readdir%s: %d\n",
 676                        plus? "plus" : "", status);
 677        return status;
 678}
 679
 680static int
 681nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 682                dev_t rdev)
 683{
 684        struct nfs3_createdata *data;
 685        umode_t mode = sattr->ia_mode;
 686        int status = -ENOMEM;
 687
 688        dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 689                        MAJOR(rdev), MINOR(rdev));
 690
 691        sattr->ia_mode &= ~current_umask();
 692
 693        data = nfs3_alloc_createdata();
 694        if (data == NULL)
 695                goto out;
 696
 697        data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 698        data->arg.mknod.fh = NFS_FH(dir);
 699        data->arg.mknod.name = dentry->d_name.name;
 700        data->arg.mknod.len = dentry->d_name.len;
 701        data->arg.mknod.sattr = sattr;
 702        data->arg.mknod.rdev = rdev;
 703
 704        switch (sattr->ia_mode & S_IFMT) {
 705        case S_IFBLK:
 706                data->arg.mknod.type = NF3BLK;
 707                break;
 708        case S_IFCHR:
 709                data->arg.mknod.type = NF3CHR;
 710                break;
 711        case S_IFIFO:
 712                data->arg.mknod.type = NF3FIFO;
 713                break;
 714        case S_IFSOCK:
 715                data->arg.mknod.type = NF3SOCK;
 716                break;
 717        default:
 718                status = -EINVAL;
 719                goto out;
 720        }
 721
 722        status = nfs3_do_create(dir, dentry, data);
 723        if (status != 0)
 724                goto out;
 725        status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 726out:
 727        nfs3_free_createdata(data);
 728        dprintk("NFS reply mknod: %d\n", status);
 729        return status;
 730}
 731
 732static int
 733nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 734                 struct nfs_fsstat *stat)
 735{
 736        struct rpc_message msg = {
 737                .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 738                .rpc_argp       = fhandle,
 739                .rpc_resp       = stat,
 740        };
 741        int     status;
 742
 743        dprintk("NFS call  fsstat\n");
 744        nfs_fattr_init(stat->fattr);
 745        status = rpc_call_sync(server->client, &msg, 0);
 746        dprintk("NFS reply fsstat: %d\n", status);
 747        return status;
 748}
 749
 750static int
 751do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 752                 struct nfs_fsinfo *info)
 753{
 754        struct rpc_message msg = {
 755                .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 756                .rpc_argp       = fhandle,
 757                .rpc_resp       = info,
 758        };
 759        int     status;
 760
 761        dprintk("NFS call  fsinfo\n");
 762        nfs_fattr_init(info->fattr);
 763        status = rpc_call_sync(client, &msg, 0);
 764        dprintk("NFS reply fsinfo: %d\n", status);
 765        return status;
 766}
 767
 768/*
 769 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 770 * nfs_create_server
 771 */
 772static int
 773nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 774                   struct nfs_fsinfo *info)
 775{
 776        int     status;
 777
 778        status = do_proc_fsinfo(server->client, fhandle, info);
 779        if (status && server->nfs_client->cl_rpcclient != server->client)
 780                status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 781        return status;
 782}
 783
 784static int
 785nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 786                   struct nfs_pathconf *info)
 787{
 788        struct rpc_message msg = {
 789                .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 790                .rpc_argp       = fhandle,
 791                .rpc_resp       = info,
 792        };
 793        int     status;
 794
 795        dprintk("NFS call  pathconf\n");
 796        nfs_fattr_init(info->fattr);
 797        status = rpc_call_sync(server->client, &msg, 0);
 798        dprintk("NFS reply pathconf: %d\n", status);
 799        return status;
 800}
 801
 802static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 803{
 804        if (nfs3_async_handle_jukebox(task, data->inode))
 805                return -EAGAIN;
 806
 807        nfs_invalidate_atime(data->inode);
 808        nfs_refresh_inode(data->inode, &data->fattr);
 809        return 0;
 810}
 811
 812static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 813{
 814        msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 815}
 816
 817static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 818{
 819        if (nfs3_async_handle_jukebox(task, data->inode))
 820                return -EAGAIN;
 821        if (task->tk_status >= 0)
 822                nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
 823        return 0;
 824}
 825
 826static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 827{
 828        msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 829}
 830
 831static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 832{
 833        if (nfs3_async_handle_jukebox(task, data->inode))
 834                return -EAGAIN;
 835        nfs_refresh_inode(data->inode, data->res.fattr);
 836        return 0;
 837}
 838
 839static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 840{
 841        msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 842}
 843
 844static int
 845nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 846{
 847        struct inode *inode = filp->f_path.dentry->d_inode;
 848
 849        return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 850}
 851
 852const struct nfs_rpc_ops nfs_v3_clientops = {
 853        .version        = 3,                    /* protocol version */
 854        .dentry_ops     = &nfs_dentry_operations,
 855        .dir_inode_ops  = &nfs3_dir_inode_operations,
 856        .file_inode_ops = &nfs3_file_inode_operations,
 857        .file_ops       = &nfs_file_operations,
 858        .getroot        = nfs3_proc_get_root,
 859        .getattr        = nfs3_proc_getattr,
 860        .setattr        = nfs3_proc_setattr,
 861        .lookup         = nfs3_proc_lookup,
 862        .access         = nfs3_proc_access,
 863        .readlink       = nfs3_proc_readlink,
 864        .create         = nfs3_proc_create,
 865        .remove         = nfs3_proc_remove,
 866        .unlink_setup   = nfs3_proc_unlink_setup,
 867        .unlink_done    = nfs3_proc_unlink_done,
 868        .rename         = nfs3_proc_rename,
 869        .rename_setup   = nfs3_proc_rename_setup,
 870        .rename_done    = nfs3_proc_rename_done,
 871        .link           = nfs3_proc_link,
 872        .symlink        = nfs3_proc_symlink,
 873        .mkdir          = nfs3_proc_mkdir,
 874        .rmdir          = nfs3_proc_rmdir,
 875        .readdir        = nfs3_proc_readdir,
 876        .mknod          = nfs3_proc_mknod,
 877        .statfs         = nfs3_proc_statfs,
 878        .fsinfo         = nfs3_proc_fsinfo,
 879        .pathconf       = nfs3_proc_pathconf,
 880        .decode_dirent  = nfs3_decode_dirent,
 881        .read_setup     = nfs3_proc_read_setup,
 882        .read_done      = nfs3_read_done,
 883        .write_setup    = nfs3_proc_write_setup,
 884        .write_done     = nfs3_write_done,
 885        .commit_setup   = nfs3_proc_commit_setup,
 886        .commit_done    = nfs3_commit_done,
 887        .lock           = nfs3_proc_lock,
 888        .clear_acl_cache = nfs3_forget_cached_acls,
 889        .close_context  = nfs_close_context,
 890        .init_client    = nfs_init_client,
 891};
 892