fs/orangefs/file.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * (C) 2001 Clemson University and The University of Chicago
   4  * Copyright 2018 Omnibond Systems, L.L.C.
   5  *
   6  * See COPYING in top-level directory.
   7  */
   8
   9 /*
  10  *  Linux VFS file operations.
  11  */
  12
  13 #include "protocol.h"
  14 #include "orangefs-kernel.h"
  15 #include "orangefs-bufmap.h"
  16 #include <linux/fs.h>
  17 #include <linux/pagemap.h>
  18
  19 static int flush_racache(struct inode *inode)
  20 {
  21         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
  22         struct orangefs_kernel_op_s *new_op;
  23         int ret;
  24
  25         gossip_debug(GOSSIP_UTILS_DEBUG,
  26             "%s: %pU: Handle is %pU | fs_id %d\n", __func__,
  27             get_khandle_from_ino(inode), &orangefs_inode->refn.khandle,
  28             orangefs_inode->refn.fs_id);
  29
  30         new_op = op_alloc(ORANGEFS_VFS_OP_RA_FLUSH);
  31         if (!new_op)
  32                 return -ENOMEM;
  33         new_op->upcall.req.ra_cache_flush.refn = orangefs_inode->refn;
  34
  35         ret = service_operation(new_op, "orangefs_flush_racache",
  36             get_interruptible_flag(inode));
  37
  38         gossip_debug(GOSSIP_UTILS_DEBUG, "%s: got return value of %d\n",
  39             __func__, ret);
  40
  41         op_release(new_op);
  42         return ret;
  43 }
  44
  45 /*
  46  * Post and wait for the I/O upcall to finish
  47  */
  48 ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inode,
  49     loff_t *offset, struct iov_iter *iter, size_t total_size,
  50     loff_t readahead_size, struct orangefs_write_range *wr, int *index_return)
  51 {
  52         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
  53         struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
  54         struct orangefs_kernel_op_s *new_op = NULL;
  55         int buffer_index = -1;
  56         ssize_t ret;
  57         size_t copy_amount;
  58
  59         new_op = op_alloc(ORANGEFS_VFS_OP_FILE_IO);
  60         if (!new_op)
  61                 return -ENOMEM;
  62
  63         /* synchronous I/O */
  64         new_op->upcall.req.io.readahead_size = readahead_size;
  65         new_op->upcall.req.io.io_type = type;
  66         new_op->upcall.req.io.refn = orangefs_inode->refn;
  67
  68 populate_shared_memory:
  69         /* get a shared buffer index */
  70         buffer_index = orangefs_bufmap_get();
  71         if (buffer_index < 0) {
  72                 ret = buffer_index;
  73                 gossip_debug(GOSSIP_FILE_DEBUG,
  74                              "%s: orangefs_bufmap_get failure (%zd)\n",
  75                              __func__, ret);
  76                 goto out;
  77         }
  78         gossip_debug(GOSSIP_FILE_DEBUG,
  79                      "%s(%pU): GET op %p -> buffer_index %d\n",
  80                      __func__,
  81                      handle,
  82                      new_op,
  83                      buffer_index);
  84
  85         new_op->uses_shared_memory = 1;
  86         new_op->upcall.req.io.buf_index = buffer_index;
  87         new_op->upcall.req.io.count = total_size;
  88         new_op->upcall.req.io.offset = *offset;
  89         if (type == ORANGEFS_IO_WRITE && wr) {
  90                 new_op->upcall.uid = from_kuid(&init_user_ns, wr->uid);
  91                 new_op->upcall.gid = from_kgid(&init_user_ns, wr->gid);
  92         }
  93
  94         gossip_debug(GOSSIP_FILE_DEBUG,
  95                      "%s(%pU): offset: %llu total_size: %zd\n",
  96                      __func__,
  97                      handle,
  98                      llu(*offset),
  99                      total_size);
 100         /*
 101          * Stage 1: copy the buffers into client-core's address space
 102          */
 103         if (type == ORANGEFS_IO_WRITE && total_size) {
 104                 ret = orangefs_bufmap_copy_from_iovec(iter, buffer_index,
 105                     total_size);
 106                 if (ret < 0) {
 107                         gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
 108                             __func__, (long)ret);
 109                         goto out;
 110                 }
 111         }
 112
 113         gossip_debug(GOSSIP_FILE_DEBUG,
 114                      "%s(%pU): Calling post_io_request with tag (%llu)\n",
 115                      __func__,
 116                      handle,
 117                      llu(new_op->tag));
 118
 119         /* Stage 2: Service the I/O operation */
 120         ret = service_operation(new_op,
 121                                 type == ORANGEFS_IO_WRITE ?
 122                                         "file_write" :
 123                                         "file_read",
 124                                 get_interruptible_flag(inode));
 125
 126         /*
 127          * If service_operation() returns -EAGAIN #and# the operation was
 128          * purged from orangefs_request_list or htable_ops_in_progress, then
 129          * we know that the client was restarted, causing the shared memory
 130          * area to be wiped clean.  To restart a  write operation in this
 131          * case, we must re-copy the data from the user's iovec to a NEW
 132          * shared memory location. To restart a read operation, we must get
 133          * a new shared memory location.
 134          */
 135         if (ret == -EAGAIN && op_state_purged(new_op)) {
 136                 orangefs_bufmap_put(buffer_index);
 137                 buffer_index = -1;
 138                 if (type == ORANGEFS_IO_WRITE)
 139                         iov_iter_revert(iter, total_size);
 140                 gossip_debug(GOSSIP_FILE_DEBUG,
 141                              "%s:going to repopulate_shared_memory.\n",
 142                              __func__);
 143                 goto populate_shared_memory;
 144         }
 145
 146         if (ret < 0) {
 147                 if (ret == -EINTR) {
 148                         /*
 149                          * We can't return EINTR if any data was written,
 150                          * it's not POSIX. It is minimally acceptable
 151                          * to give a partial write, the way NFS does.
 152                          *
 153                          * It would be optimal to return all or nothing,
 154                          * but if a userspace write is bigger than
 155                          * an IO buffer, and the interrupt occurs
 156                          * between buffer writes, that would not be
 157                          * possible.
 158                          */
 159                         switch (new_op->op_state - OP_VFS_STATE_GIVEN_UP) {
 160                         /*
 161                          * If the op was waiting when the interrupt
 162                          * occurred, then the client-core did not
 163                          * trigger the write.
 164                          */
 165                         case OP_VFS_STATE_WAITING:
 166                                 if (*offset == 0)
 167                                         ret = -EINTR;
 168                                 else
 169                                         ret = 0;
 170                                 break;
 171                         /*
 172                          * If the op was in progress when the interrupt
 173                          * occurred, then the client-core was able to
 174                          * trigger the write.
 175                          */
 176                         case OP_VFS_STATE_INPROGR:
 177                                 if (type == ORANGEFS_IO_READ)
 178                                         ret = -EINTR;
 179                                 else
 180                                         ret = total_size;
 181                                 break;
 182                         default:
 183                                 gossip_err("%s: unexpected op state :%d:.\n",
 184                                            __func__,
 185                                            new_op->op_state);
 186                                 ret = 0;
 187                                 break;
 188                         }
 189                         gossip_debug(GOSSIP_FILE_DEBUG,
 190                                      "%s: got EINTR, state:%d: %p\n",
 191                                      __func__,
 192                                      new_op->op_state,
 193                                      new_op);
 194                 } else {
 195                         gossip_err("%s: error in %s handle %pU, returning %zd\n",
 196                                 __func__,
 197                                 type == ORANGEFS_IO_READ ?
 198                                         "read from" : "write to",
 199                                 handle, ret);
 200                 }
 201                 if (orangefs_cancel_op_in_progress(new_op))
 202                         return ret;
 203
 204                 goto out;
 205         }
 206
 207         /*
 208          * Stage 3: Post copy buffers from client-core's address space
 209          */
 210         if (type == ORANGEFS_IO_READ && new_op->downcall.resp.io.amt_complete) {
 211                 /*
 212                  * NOTE: the iovector can either contain addresses which
 213                  *       can futher be kernel-space or user-space addresses.
 214                  *       or it can pointers to struct page's
 215                  */
 216
 217                 /*
 218                  * When reading, readahead_size will only be zero when
 219                  * we're doing O_DIRECT, otherwise we got here from
 220                  * orangefs_readpage.
 221                  *
 222                  * If we got here from orangefs_readpage we want to
 223                  * copy either a page or the whole file into the io
 224                  * vector, whichever is smaller.
 225                  */
 226                 if (readahead_size)
 227                         copy_amount =
 228                                 min(new_op->downcall.resp.io.amt_complete,
 229                                         (__s64)PAGE_SIZE);
 230                 else
 231                         copy_amount = new_op->downcall.resp.io.amt_complete;
 232
 233                 ret = orangefs_bufmap_copy_to_iovec(iter, buffer_index,
 234                         copy_amount);
 235                 if (ret < 0) {
 236                         gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
 237                             __func__, (long)ret);
 238                         goto out;
 239                 }
 240         }
 241         gossip_debug(GOSSIP_FILE_DEBUG,
 242             "%s(%pU): Amount %s, returned by the sys-io call:%d\n",
 243             __func__,
 244             handle,
 245             type == ORANGEFS_IO_READ ?  "read" : "written",
 246             (int)new_op->downcall.resp.io.amt_complete);
 247
 248         ret = new_op->downcall.resp.io.amt_complete;
 249
 250 out:
 251         if (buffer_index >= 0) {
 252                 if ((readahead_size) && (type == ORANGEFS_IO_READ)) {
 253                         /* readpage */
 254                         *index_return = buffer_index;
 255                         gossip_debug(GOSSIP_FILE_DEBUG,
 256                                 "%s: hold on to buffer_index :%d:\n",
 257                                 __func__, buffer_index);
 258                 } else {
 259                         /* O_DIRECT */
 260                         orangefs_bufmap_put(buffer_index);
 261                         gossip_debug(GOSSIP_FILE_DEBUG,
 262                                 "%s(%pU): PUT buffer_index %d\n",
 263                                 __func__, handle, buffer_index);
 264                 }
 265                 buffer_index = -1;
 266         }
 267         op_release(new_op);
 268         return ret;
 269 }
 270
 271 int orangefs_revalidate_mapping(struct inode *inode)
 272 {
 273         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 274         struct address_space *mapping = inode->i_mapping;
 275         unsigned long *bitlock = &orangefs_inode->bitlock;
 276         int ret;
 277
 278         while (1) {
 279                 ret = wait_on_bit(bitlock, 1, TASK_KILLABLE);
 280                 if (ret)
 281                         return ret;
 282                 spin_lock(&inode->i_lock);
 283                 if (test_bit(1, bitlock)) {
 284                         spin_unlock(&inode->i_lock);
 285                         continue;
 286                 }
 287                 if (!time_before(jiffies, orangefs_inode->mapping_time))
 288                         break;
 289                 spin_unlock(&inode->i_lock);
 290                 return 0;
 291         }
 292
 293         set_bit(1, bitlock);
 294         smp_wmb();
 295         spin_unlock(&inode->i_lock);
 296
 297         unmap_mapping_range(mapping, 0, 0, 0);
 298         ret = filemap_write_and_wait(mapping);
 299         if (!ret)
 300                 ret = invalidate_inode_pages2(mapping);
 301
 302         orangefs_inode->mapping_time = jiffies +
 303             orangefs_cache_timeout_msecs*HZ/1000;
 304
 305         clear_bit(1, bitlock);
 306         smp_mb__after_atomic();
 307         wake_up_bit(bitlock, 1);
 308
 309         return ret;
 310 }
 311
 312 static ssize_t orangefs_file_read_iter(struct kiocb *iocb,
 313     struct iov_iter *iter)
 314 {
 315         int ret;
 316         struct orangefs_read_options *ro;
 317
 318         orangefs_stats.reads++;
 319
 320         /*
 321          * Remember how they set "count" in read(2) or pread(2) or whatever -
 322          * users can use count as a knob to control orangefs io size and later
 323          * we can try to help them fill as many pages as possible in readpage.
 324          */
 325         if (!iocb->ki_filp->private_data) {
 326                 iocb->ki_filp->private_data = kmalloc(sizeof *ro, GFP_KERNEL);
 327                 if (!iocb->ki_filp->private_data)
 328                         return(ENOMEM);
 329                 ro = iocb->ki_filp->private_data;
 330                 ro->blksiz = iter->count;
 331         }
 332
 333         down_read(&file_inode(iocb->ki_filp)->i_rwsem);
 334         ret = orangefs_revalidate_mapping(file_inode(iocb->ki_filp));
 335         if (ret)
 336                 goto out;
 337
 338         ret = generic_file_read_iter(iocb, iter);
 339 out:
 340         up_read(&file_inode(iocb->ki_filp)->i_rwsem);
 341         return ret;
 342 }
 343
 344 static ssize_t orangefs_file_write_iter(struct kiocb *iocb,
 345     struct iov_iter *iter)
 346 {
 347         int ret;
 348         orangefs_stats.writes++;
 349
 350         if (iocb->ki_pos > i_size_read(file_inode(iocb->ki_filp))) {
 351                 ret = orangefs_revalidate_mapping(file_inode(iocb->ki_filp));
 352                 if (ret)
 353                         return ret;
 354         }
 355
 356         ret = generic_file_write_iter(iocb, iter);
 357         return ret;
 358 }
 359
 360 static int orangefs_getflags(struct inode *inode, unsigned long *uval)
 361 {
 362         __u64 val = 0;
 363         int ret;
 364
 365         ret = orangefs_inode_getxattr(inode,
 366                                       "user.pvfs2.meta_hint",
 367                                       &val, sizeof(val));
 368         if (ret < 0 && ret != -ENODATA)
 369                 return ret;
 370         else if (ret == -ENODATA)
 371                 val = 0;
 372         *uval = val;
 373         return 0;
 374 }
 375
 376 /*
 377  * Perform a miscellaneous operation on a file.
 378  */
 379 static long orangefs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 380 {
 381         struct inode *inode = file_inode(file);
 382         int ret = -ENOTTY;
 383         __u64 val = 0;
 384         unsigned long uval;
 385
 386         gossip_debug(GOSSIP_FILE_DEBUG,
 387                      "orangefs_ioctl: called with cmd %d\n",
 388                      cmd);
 389
 390         /*
 391          * we understand some general ioctls on files, such as the immutable
 392          * and append flags
 393          */
 394         if (cmd == FS_IOC_GETFLAGS) {
 395                 ret = orangefs_getflags(inode, &uval);
 396                 if (ret)
 397                         return ret;
 398                 gossip_debug(GOSSIP_FILE_DEBUG,
 399                              "orangefs_ioctl: FS_IOC_GETFLAGS: %llu\n",
 400                              (unsigned long long)uval);
 401                 return put_user(uval, (int __user *)arg);
 402         } else if (cmd == FS_IOC_SETFLAGS) {
 403                 unsigned long old_uval;
 404
 405                 ret = 0;
 406                 if (get_user(uval, (int __user *)arg))
 407                         return -EFAULT;
 408                 /*
 409                  * ORANGEFS_MIRROR_FL is set internally when the mirroring mode
 410                  * is turned on for a file. The user is not allowed to turn
 411                  * on this bit, but the bit is present if the user first gets
 412                  * the flags and then updates the flags with some new
 413                  * settings. So, we ignore it in the following edit. bligon.
 414                  */
 415                 if ((uval & ~ORANGEFS_MIRROR_FL) &
 416                     (~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL))) {
 417                         gossip_err("orangefs_ioctl: the FS_IOC_SETFLAGS only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n");
 418                         return -EINVAL;
 419                 }
 420                 ret = orangefs_getflags(inode, &old_uval);
 421                 if (ret)
 422                         return ret;
 423                 ret = vfs_ioc_setflags_prepare(inode, old_uval, uval);
 424                 if (ret)
 425                         return ret;
 426                 val = uval;
 427                 gossip_debug(GOSSIP_FILE_DEBUG,
 428                              "orangefs_ioctl: FS_IOC_SETFLAGS: %llu\n",
 429                              (unsigned long long)val);
 430                 ret = orangefs_inode_setxattr(inode,
 431                                               "user.pvfs2.meta_hint",
 432                                               &val, sizeof(val), 0);
 433         }
 434
 435         return ret;
 436 }
 437
 438 static vm_fault_t orangefs_fault(struct vm_fault *vmf)
 439 {
 440         struct file *file = vmf->vma->vm_file;
 441         int ret;
 442         ret = orangefs_inode_getattr(file->f_mapping->host,
 443             ORANGEFS_GETATTR_SIZE);
 444         if (ret == -ESTALE)
 445                 ret = -EIO;
 446         if (ret) {
 447                 gossip_err("%s: orangefs_inode_getattr failed, "
 448                     "ret:%d:.\n", __func__, ret);
 449                 return VM_FAULT_SIGBUS;
 450         }
 451         return filemap_fault(vmf);
 452 }
 453
 454 static const struct vm_operations_struct orangefs_file_vm_ops = {
 455         .fault = orangefs_fault,
 456         .map_pages = filemap_map_pages,
 457         .page_mkwrite = orangefs_page_mkwrite,
 458 };
 459
 460 /*
 461  * Memory map a region of a file.
 462  */
 463 static int orangefs_file_mmap(struct file *file, struct vm_area_struct *vma)
 464 {
 465         int ret;
 466
 467         ret = orangefs_revalidate_mapping(file_inode(file));
 468         if (ret)
 469                 return ret;
 470
 471         gossip_debug(GOSSIP_FILE_DEBUG,
 472                      "orangefs_file_mmap: called on %s\n",
 473                      (file ?
 474                         (char *)file->f_path.dentry->d_name.name :
 475                         (char *)"Unknown"));
 476
 477         /* set the sequential readahead hint */
 478         vma->vm_flags |= VM_SEQ_READ;
 479         vma->vm_flags &= ~VM_RAND_READ;
 480
 481         file_accessed(file);
 482         vma->vm_ops = &orangefs_file_vm_ops;
 483         return 0;
 484 }
 485
 486 #define mapping_nrpages(idata) ((idata)->nrpages)
 487
 488 /*
 489  * Called to notify the module that there are no more references to
 490  * this file (i.e. no processes have it open).
 491  *
 492  * \note Not called when each file is closed.
 493  */
 494 static int orangefs_file_release(struct inode *inode, struct file *file)
 495 {
 496         gossip_debug(GOSSIP_FILE_DEBUG,
 497                      "orangefs_file_release: called on %pD\n",
 498                      file);
 499
 500         /*
 501          * remove all associated inode pages from the page cache and
 502          * readahead cache (if any); this forces an expensive refresh of
 503          * data for the next caller of mmap (or 'get_block' accesses)
 504          */
 505         if (file_inode(file) &&
 506             file_inode(file)->i_mapping &&
 507             mapping_nrpages(&file_inode(file)->i_data)) {
 508                 if (orangefs_features & ORANGEFS_FEATURE_READAHEAD) {
 509                         gossip_debug(GOSSIP_INODE_DEBUG,
 510                             "calling flush_racache on %pU\n",
 511                             get_khandle_from_ino(inode));
 512                         flush_racache(inode);
 513                         gossip_debug(GOSSIP_INODE_DEBUG,
 514                             "flush_racache finished\n");
 515                 }
 516
 517         }
 518         return 0;
 519 }
 520
 521 /*
 522  * Push all data for a specific file onto permanent storage.
 523  */
 524 static int orangefs_fsync(struct file *file,
 525                        loff_t start,
 526                        loff_t end,
 527                        int datasync)
 528 {
 529         int ret;
 530         struct orangefs_inode_s *orangefs_inode =
 531                 ORANGEFS_I(file_inode(file));
 532         struct orangefs_kernel_op_s *new_op = NULL;
 533
 534         ret = filemap_write_and_wait_range(file_inode(file)->i_mapping,
 535             start, end);
 536         if (ret < 0)
 537                 return ret;
 538
 539         new_op = op_alloc(ORANGEFS_VFS_OP_FSYNC);
 540         if (!new_op)
 541                 return -ENOMEM;
 542         new_op->upcall.req.fsync.refn = orangefs_inode->refn;
 543
 544         ret = service_operation(new_op,
 545                         "orangefs_fsync",
 546                         get_interruptible_flag(file_inode(file)));
 547
 548         gossip_debug(GOSSIP_FILE_DEBUG,
 549                      "orangefs_fsync got return value of %d\n",
 550                      ret);
 551
 552         op_release(new_op);
 553         return ret;
 554 }
 555
 556 /*
 557  * Change the file pointer position for an instance of an open file.
 558  *
 559  * \note If .llseek is overriden, we must acquire lock as described in
 560  *       Documentation/filesystems/Locking.
 561  *
 562  * Future upgrade could support SEEK_DATA and SEEK_HOLE but would
 563  * require much changes to the FS
 564  */
 565 static loff_t orangefs_file_llseek(struct file *file, loff_t offset, int origin)
 566 {
 567         int ret = -EINVAL;
 568         struct inode *inode = file_inode(file);
 569
 570         if (origin == SEEK_END) {
 571                 /*
 572                  * revalidate the inode's file size.
 573                  * NOTE: We are only interested in file size here,
 574                  * so we set mask accordingly.
 575                  */
 576                 ret = orangefs_inode_getattr(file->f_mapping->host,
 577                     ORANGEFS_GETATTR_SIZE);
 578                 if (ret == -ESTALE)
 579                         ret = -EIO;
 580                 if (ret) {
 581                         gossip_debug(GOSSIP_FILE_DEBUG,
 582                                      "%s:%s:%d calling make bad inode\n",
 583                                      __FILE__,
 584                                      __func__,
 585                                      __LINE__);
 586                         return ret;
 587                 }
 588         }
 589
 590         gossip_debug(GOSSIP_FILE_DEBUG,
 591                      "orangefs_file_llseek: offset is %ld | origin is %d"
 592                      " | inode size is %lu\n",
 593                      (long)offset,
 594                      origin,
 595                      (unsigned long)i_size_read(inode));
 596
 597         return generic_file_llseek(file, offset, origin);
 598 }
 599
 600 /*
 601  * Support local locks (locks that only this kernel knows about)
 602  * if Orangefs was mounted -o local_lock.
 603  */
 604 static int orangefs_lock(struct file *filp, int cmd, struct file_lock *fl)
 605 {
 606         int rc = -EINVAL;
 607
 608         if (ORANGEFS_SB(file_inode(filp)->i_sb)->flags & ORANGEFS_OPT_LOCAL_LOCK) {
 609                 if (cmd == F_GETLK) {
 610                         rc = 0;
 611                         posix_test_lock(filp, fl);
 612                 } else {
 613                         rc = posix_lock_file(filp, fl, NULL);
 614                 }
 615         }
 616
 617         return rc;
 618 }
 619
 620 static int orangefs_file_open(struct inode * inode, struct file *file)
 621 {
 622         file->private_data = NULL;
 623         return generic_file_open(inode, file);
 624 }
 625
 626 static int orangefs_flush(struct file *file, fl_owner_t id)
 627 {
 628         /*
 629          * This is vfs_fsync_range(file, 0, LLONG_MAX, 0) without the
 630          * service_operation in orangefs_fsync.
 631          *
 632          * Do not send fsync to OrangeFS server on a close.  Do send fsync
 633          * on an explicit fsync call.  This duplicates historical OrangeFS
 634          * behavior.
 635          */
 636         struct inode *inode = file->f_mapping->host;
 637         int r;
 638
 639         kfree(file->private_data);
 640         file->private_data = NULL;
 641
 642         if (inode->i_state & I_DIRTY_TIME) {
 643                 spin_lock(&inode->i_lock);
 644                 inode->i_state &= ~I_DIRTY_TIME;
 645                 spin_unlock(&inode->i_lock);
 646                 mark_inode_dirty_sync(inode);
 647         }
 648
 649         r = filemap_write_and_wait_range(file->f_mapping, 0, LLONG_MAX);
 650         if (r > 0)
 651                 return 0;
 652         else
 653                 return r;
 654 }
 655
 656 /** ORANGEFS implementation of VFS file operations */
 657 const struct file_operations orangefs_file_operations = {
 658         .llseek         = orangefs_file_llseek,
 659         .read_iter      = orangefs_file_read_iter,
 660         .write_iter     = orangefs_file_write_iter,
 661         .lock           = orangefs_lock,
 662         .unlocked_ioctl = orangefs_ioctl,
 663         .mmap           = orangefs_file_mmap,
 664         .open           = orangefs_file_open,
 665         .flush          = orangefs_flush,
 666         .release        = orangefs_file_release,
 667         .fsync          = orangefs_fsync,
 668 };