fs/orangefs/file.c

   1 /*
   2  * (C) 2001 Clemson University and The University of Chicago
   3  *
   4  * See COPYING in top-level directory.
   5  */
   6
   7 /*
   8  *  Linux VFS file operations.
   9  */
  10
  11 #include "protocol.h"
  12 #include "orangefs-kernel.h"
  13 #include "orangefs-bufmap.h"
  14 #include <linux/fs.h>
  15 #include <linux/pagemap.h>
  16
  17 /*
  18  * Copy to client-core's address space from the buffers specified
  19  * by the iovec upto total_size bytes.
  20  * NOTE: the iovector can either contain addresses which
  21  *       can futher be kernel-space or user-space addresses.
  22  *       or it can pointers to struct page's
  23  */
  24 static int precopy_buffers(int buffer_index,
  25                            struct iov_iter *iter,
  26                            size_t total_size)
  27 {
  28         int ret = 0;
  29         /*
  30          * copy data from application/kernel by pulling it out
  31          * of the iovec.
  32          */
  33
  34
  35         if (total_size) {
  36                 ret = orangefs_bufmap_copy_from_iovec(iter,
  37                                                       buffer_index,
  38                                                       total_size);
  39                 if (ret < 0)
  40                 gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
  41                            __func__,
  42                            (long)ret);
  43         }
  44
  45         if (ret < 0)
  46                 gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
  47                         __func__,
  48                         (long)ret);
  49         return ret;
  50 }
  51
  52 /*
  53  * Copy from client-core's address space to the buffers specified
  54  * by the iovec upto total_size bytes.
  55  * NOTE: the iovector can either contain addresses which
  56  *       can futher be kernel-space or user-space addresses.
  57  *       or it can pointers to struct page's
  58  */
  59 static int postcopy_buffers(int buffer_index,
  60                             struct iov_iter *iter,
  61                             size_t total_size)
  62 {
  63         int ret = 0;
  64         /*
  65          * copy data to application/kernel by pushing it out to
  66          * the iovec. NOTE; target buffers can be addresses or
  67          * struct page pointers.
  68          */
  69         if (total_size) {
  70                 ret = orangefs_bufmap_copy_to_iovec(iter,
  71                                                     buffer_index,
  72                                                     total_size);
  73                 if (ret < 0)
  74                         gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
  75                                 __func__,
  76                                 (long)ret);
  77         }
  78         return ret;
  79 }
  80
  81 /*
  82  * Post and wait for the I/O upcall to finish
  83  */
  84 static ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inode,
  85                 loff_t *offset, struct iov_iter *iter,
  86                 size_t total_size, loff_t readahead_size)
  87 {
  88         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
  89         struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
  90         struct orangefs_kernel_op_s *new_op = NULL;
  91         struct iov_iter saved = *iter;
  92         int buffer_index = -1;
  93         ssize_t ret;
  94
  95         new_op = op_alloc(ORANGEFS_VFS_OP_FILE_IO);
  96         if (!new_op)
  97                 return -ENOMEM;
  98
  99         /* synchronous I/O */
 100         new_op->upcall.req.io.readahead_size = readahead_size;
 101         new_op->upcall.req.io.io_type = type;
 102         new_op->upcall.req.io.refn = orangefs_inode->refn;
 103
 104 populate_shared_memory:
 105         /* get a shared buffer index */
 106         buffer_index = orangefs_bufmap_get();
 107         if (buffer_index < 0) {
 108                 ret = buffer_index;
 109                 gossip_debug(GOSSIP_FILE_DEBUG,
 110                              "%s: orangefs_bufmap_get failure (%zd)\n",
 111                              __func__, ret);
 112                 goto out;
 113         }
 114         gossip_debug(GOSSIP_FILE_DEBUG,
 115                      "%s(%pU): GET op %p -> buffer_index %d\n",
 116                      __func__,
 117                      handle,
 118                      new_op,
 119                      buffer_index);
 120
 121         new_op->uses_shared_memory = 1;
 122         new_op->upcall.req.io.buf_index = buffer_index;
 123         new_op->upcall.req.io.count = total_size;
 124         new_op->upcall.req.io.offset = *offset;
 125
 126         gossip_debug(GOSSIP_FILE_DEBUG,
 127                      "%s(%pU): offset: %llu total_size: %zd\n",
 128                      __func__,
 129                      handle,
 130                      llu(*offset),
 131                      total_size);
 132         /*
 133          * Stage 1: copy the buffers into client-core's address space
 134          * precopy_buffers only pertains to writes.
 135          */
 136         if (type == ORANGEFS_IO_WRITE) {
 137                 ret = precopy_buffers(buffer_index,
 138                                       iter,
 139                                       total_size);
 140                 if (ret < 0)
 141                         goto out;
 142         }
 143
 144         gossip_debug(GOSSIP_FILE_DEBUG,
 145                      "%s(%pU): Calling post_io_request with tag (%llu)\n",
 146                      __func__,
 147                      handle,
 148                      llu(new_op->tag));
 149
 150         /* Stage 2: Service the I/O operation */
 151         ret = service_operation(new_op,
 152                                 type == ORANGEFS_IO_WRITE ?
 153                                         "file_write" :
 154                                         "file_read",
 155                                 get_interruptible_flag(inode));
 156
 157         /*
 158          * If service_operation() returns -EAGAIN #and# the operation was
 159          * purged from orangefs_request_list or htable_ops_in_progress, then
 160          * we know that the client was restarted, causing the shared memory
 161          * area to be wiped clean.  To restart a  write operation in this
 162          * case, we must re-copy the data from the user's iovec to a NEW
 163          * shared memory location. To restart a read operation, we must get
 164          * a new shared memory location.
 165          */
 166         if (ret == -EAGAIN && op_state_purged(new_op)) {
 167                 orangefs_bufmap_put(buffer_index);
 168                 buffer_index = -1;
 169                 if (type == ORANGEFS_IO_WRITE)
 170                         *iter = saved;
 171                 gossip_debug(GOSSIP_FILE_DEBUG,
 172                              "%s:going to repopulate_shared_memory.\n",
 173                              __func__);
 174                 goto populate_shared_memory;
 175         }
 176
 177         if (ret < 0) {
 178                 if (ret == -EINTR) {
 179                         /*
 180                          * We can't return EINTR if any data was written,
 181                          * it's not POSIX. It is minimally acceptable
 182                          * to give a partial write, the way NFS does.
 183                          *
 184                          * It would be optimal to return all or nothing,
 185                          * but if a userspace write is bigger than
 186                          * an IO buffer, and the interrupt occurs
 187                          * between buffer writes, that would not be
 188                          * possible.
 189                          */
 190                         switch (new_op->op_state - OP_VFS_STATE_GIVEN_UP) {
 191                         /*
 192                          * If the op was waiting when the interrupt
 193                          * occurred, then the client-core did not
 194                          * trigger the write.
 195                          */
 196                         case OP_VFS_STATE_WAITING:
 197                                 if (*offset == 0)
 198                                         ret = -EINTR;
 199                                 else
 200                                         ret = 0;
 201                                 break;
 202                         /*
 203                          * If the op was in progress when the interrupt
 204                          * occurred, then the client-core was able to
 205                          * trigger the write.
 206                          */
 207                         case OP_VFS_STATE_INPROGR:
 208                                 ret = total_size;
 209                                 break;
 210                         default:
 211                                 gossip_err("%s: unexpected op state :%d:.\n",
 212                                            __func__,
 213                                            new_op->op_state);
 214                                 ret = 0;
 215                                 break;
 216                         }
 217                         gossip_debug(GOSSIP_FILE_DEBUG,
 218                                      "%s: got EINTR, state:%d: %p\n",
 219                                      __func__,
 220                                      new_op->op_state,
 221                                      new_op);
 222                 } else {
 223                         gossip_err("%s: error in %s handle %pU, returning %zd\n",
 224                                 __func__,
 225                                 type == ORANGEFS_IO_READ ?
 226                                         "read from" : "write to",
 227                                 handle, ret);
 228                 }
 229                 if (orangefs_cancel_op_in_progress(new_op))
 230                         return ret;
 231
 232                 goto out;
 233         }
 234
 235         /*
 236          * Stage 3: Post copy buffers from client-core's address space
 237          * postcopy_buffers only pertains to reads.
 238          */
 239         if (type == ORANGEFS_IO_READ) {
 240                 ret = postcopy_buffers(buffer_index,
 241                                        iter,
 242                                        new_op->downcall.resp.io.amt_complete);
 243                 if (ret < 0)
 244                         goto out;
 245         }
 246         gossip_debug(GOSSIP_FILE_DEBUG,
 247             "%s(%pU): Amount %s, returned by the sys-io call:%d\n",
 248             __func__,
 249             handle,
 250             type == ORANGEFS_IO_READ ?  "read" : "written",
 251             (int)new_op->downcall.resp.io.amt_complete);
 252
 253         ret = new_op->downcall.resp.io.amt_complete;
 254
 255 out:
 256         if (buffer_index >= 0) {
 257                 orangefs_bufmap_put(buffer_index);
 258                 gossip_debug(GOSSIP_FILE_DEBUG,
 259                              "%s(%pU): PUT buffer_index %d\n",
 260                              __func__, handle, buffer_index);
 261                 buffer_index = -1;
 262         }
 263         op_release(new_op);
 264         return ret;
 265 }
 266
 267 /*
 268  * Common entry point for read/write/readv/writev
 269  * This function will dispatch it to either the direct I/O
 270  * or buffered I/O path depending on the mount options and/or
 271  * augmented/extended metadata attached to the file.
 272  * Note: File extended attributes override any mount options.
 273  */
 274 static ssize_t do_readv_writev(enum ORANGEFS_io_type type, struct file *file,
 275                 loff_t *offset, struct iov_iter *iter)
 276 {
 277         struct inode *inode = file->f_mapping->host;
 278         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 279         struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
 280         size_t count = iov_iter_count(iter);
 281         ssize_t total_count = 0;
 282         ssize_t ret = -EINVAL;
 283
 284         gossip_debug(GOSSIP_FILE_DEBUG,
 285                 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
 286                 __func__,
 287                 handle,
 288                 (int)count);
 289
 290         if (type == ORANGEFS_IO_WRITE) {
 291                 gossip_debug(GOSSIP_FILE_DEBUG,
 292                              "%s(%pU): proceeding with offset : %llu, "
 293                              "size %d\n",
 294                              __func__,
 295                              handle,
 296                              llu(*offset),
 297                              (int)count);
 298         }
 299
 300         if (count == 0) {
 301                 ret = 0;
 302                 goto out;
 303         }
 304
 305         while (iov_iter_count(iter)) {
 306                 size_t each_count = iov_iter_count(iter);
 307                 size_t amt_complete;
 308
 309                 /* how much to transfer in this loop iteration */
 310                 if (each_count > orangefs_bufmap_size_query())
 311                         each_count = orangefs_bufmap_size_query();
 312
 313                 gossip_debug(GOSSIP_FILE_DEBUG,
 314                              "%s(%pU): size of each_count(%d)\n",
 315                              __func__,
 316                              handle,
 317                              (int)each_count);
 318                 gossip_debug(GOSSIP_FILE_DEBUG,
 319                              "%s(%pU): BEFORE wait_for_io: offset is %d\n",
 320                              __func__,
 321                              handle,
 322                              (int)*offset);
 323
 324                 ret = wait_for_direct_io(type, inode, offset, iter,
 325                                 each_count, 0);
 326                 gossip_debug(GOSSIP_FILE_DEBUG,
 327                              "%s(%pU): return from wait_for_io:%d\n",
 328                              __func__,
 329                              handle,
 330                              (int)ret);
 331
 332                 if (ret < 0)
 333                         goto out;
 334
 335                 *offset += ret;
 336                 total_count += ret;
 337                 amt_complete = ret;
 338
 339                 gossip_debug(GOSSIP_FILE_DEBUG,
 340                              "%s(%pU): AFTER wait_for_io: offset is %d\n",
 341                              __func__,
 342                              handle,
 343                              (int)*offset);
 344
 345                 /*
 346                  * if we got a short I/O operations,
 347                  * fall out and return what we got so far
 348                  */
 349                 if (amt_complete < each_count)
 350                         break;
 351         } /*end while */
 352
 353 out:
 354         if (total_count > 0)
 355                 ret = total_count;
 356         if (ret > 0) {
 357                 if (type == ORANGEFS_IO_READ) {
 358                         file_accessed(file);
 359                 } else {
 360                         SetMtimeFlag(orangefs_inode);
 361                         inode->i_mtime = CURRENT_TIME;
 362                         mark_inode_dirty_sync(inode);
 363                 }
 364         }
 365
 366         gossip_debug(GOSSIP_FILE_DEBUG,
 367                      "%s(%pU): Value(%d) returned.\n",
 368                      __func__,
 369                      handle,
 370                      (int)ret);
 371
 372         return ret;
 373 }
 374
 375 /*
 376  * Read data from a specified offset in a file (referenced by inode).
 377  * Data may be placed either in a user or kernel buffer.
 378  */
 379 ssize_t orangefs_inode_read(struct inode *inode,
 380                             struct iov_iter *iter,
 381                             loff_t *offset,
 382                             loff_t readahead_size)
 383 {
 384         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 385         size_t count = iov_iter_count(iter);
 386         size_t bufmap_size;
 387         ssize_t ret = -EINVAL;
 388
 389         g_orangefs_stats.reads++;
 390
 391         bufmap_size = orangefs_bufmap_size_query();
 392         if (count > bufmap_size) {
 393                 gossip_debug(GOSSIP_FILE_DEBUG,
 394                              "%s: count is too large (%zd/%zd)!\n",
 395                              __func__, count, bufmap_size);
 396                 return -EINVAL;
 397         }
 398
 399         gossip_debug(GOSSIP_FILE_DEBUG,
 400                      "%s(%pU) %zd@%llu\n",
 401                      __func__,
 402                      &orangefs_inode->refn.khandle,
 403                      count,
 404                      llu(*offset));
 405
 406         ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, offset, iter,
 407                         count, readahead_size);
 408         if (ret > 0)
 409                 *offset += ret;
 410
 411         gossip_debug(GOSSIP_FILE_DEBUG,
 412                      "%s(%pU): Value(%zd) returned.\n",
 413                      __func__,
 414                      &orangefs_inode->refn.khandle,
 415                      ret);
 416
 417         return ret;
 418 }
 419
 420 static ssize_t orangefs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
 421 {
 422         struct file *file = iocb->ki_filp;
 423         loff_t pos = *(&iocb->ki_pos);
 424         ssize_t rc = 0;
 425
 426         BUG_ON(iocb->private);
 427
 428         gossip_debug(GOSSIP_FILE_DEBUG, "orangefs_file_read_iter\n");
 429
 430         g_orangefs_stats.reads++;
 431
 432         rc = do_readv_writev(ORANGEFS_IO_READ, file, &pos, iter);
 433         iocb->ki_pos = pos;
 434
 435         return rc;
 436 }
 437
 438 static ssize_t orangefs_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
 439 {
 440         struct file *file = iocb->ki_filp;
 441         loff_t pos;
 442         ssize_t rc;
 443
 444         BUG_ON(iocb->private);
 445
 446         gossip_debug(GOSSIP_FILE_DEBUG, "orangefs_file_write_iter\n");
 447
 448         inode_lock(file->f_mapping->host);
 449
 450         /* Make sure generic_write_checks sees an up to date inode size. */
 451         if (file->f_flags & O_APPEND) {
 452                 rc = orangefs_inode_getattr(file->f_mapping->host, 0, 1);
 453                 if (rc == -ESTALE)
 454                         rc = -EIO;
 455                 if (rc) {
 456                         gossip_err("%s: orangefs_inode_getattr failed, "
 457                             "rc:%zd:.\n", __func__, rc);
 458                         goto out;
 459                 }
 460         }
 461
 462         if (file->f_pos > i_size_read(file->f_mapping->host))
 463                 orangefs_i_size_write(file->f_mapping->host, file->f_pos);
 464
 465         rc = generic_write_checks(iocb, iter);
 466
 467         if (rc <= 0) {
 468                 gossip_err("%s: generic_write_checks failed, rc:%zd:.\n",
 469                            __func__, rc);
 470                 goto out;
 471         }
 472
 473         /*
 474          * if we are appending, generic_write_checks would have updated
 475          * pos to the end of the file, so we will wait till now to set
 476          * pos...
 477          */
 478         pos = *(&iocb->ki_pos);
 479
 480         rc = do_readv_writev(ORANGEFS_IO_WRITE,
 481                              file,
 482                              &pos,
 483                              iter);
 484         if (rc < 0) {
 485                 gossip_err("%s: do_readv_writev failed, rc:%zd:.\n",
 486                            __func__, rc);
 487                 goto out;
 488         }
 489
 490         iocb->ki_pos = pos;
 491         g_orangefs_stats.writes++;
 492
 493 out:
 494
 495         inode_unlock(file->f_mapping->host);
 496         return rc;
 497 }
 498
 499 /*
 500  * Perform a miscellaneous operation on a file.
 501  */
 502 static long orangefs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 503 {
 504         int ret = -ENOTTY;
 505         __u64 val = 0;
 506         unsigned long uval;
 507
 508         gossip_debug(GOSSIP_FILE_DEBUG,
 509                      "orangefs_ioctl: called with cmd %d\n",
 510                      cmd);
 511
 512         /*
 513          * we understand some general ioctls on files, such as the immutable
 514          * and append flags
 515          */
 516         if (cmd == FS_IOC_GETFLAGS) {
 517                 val = 0;
 518                 ret = orangefs_inode_getxattr(file_inode(file),
 519                                               "user.pvfs2.meta_hint",
 520                                               &val, sizeof(val));
 521                 if (ret < 0 && ret != -ENODATA)
 522                         return ret;
 523                 else if (ret == -ENODATA)
 524                         val = 0;
 525                 uval = val;
 526                 gossip_debug(GOSSIP_FILE_DEBUG,
 527                              "orangefs_ioctl: FS_IOC_GETFLAGS: %llu\n",
 528                              (unsigned long long)uval);
 529                 return put_user(uval, (int __user *)arg);
 530         } else if (cmd == FS_IOC_SETFLAGS) {
 531                 ret = 0;
 532                 if (get_user(uval, (int __user *)arg))
 533                         return -EFAULT;
 534                 /*
 535                  * ORANGEFS_MIRROR_FL is set internally when the mirroring mode
 536                  * is turned on for a file. The user is not allowed to turn
 537                  * on this bit, but the bit is present if the user first gets
 538                  * the flags and then updates the flags with some new
 539                  * settings. So, we ignore it in the following edit. bligon.
 540                  */
 541                 if ((uval & ~ORANGEFS_MIRROR_FL) &
 542                     (~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL))) {
 543                         gossip_err("orangefs_ioctl: the FS_IOC_SETFLAGS only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n");
 544                         return -EINVAL;
 545                 }
 546                 val = uval;
 547                 gossip_debug(GOSSIP_FILE_DEBUG,
 548                              "orangefs_ioctl: FS_IOC_SETFLAGS: %llu\n",
 549                              (unsigned long long)val);
 550                 ret = orangefs_inode_setxattr(file_inode(file),
 551                                               "user.pvfs2.meta_hint",
 552                                               &val, sizeof(val), 0);
 553         }
 554
 555         return ret;
 556 }
 557
 558 /*
 559  * Memory map a region of a file.
 560  */
 561 static int orangefs_file_mmap(struct file *file, struct vm_area_struct *vma)
 562 {
 563         gossip_debug(GOSSIP_FILE_DEBUG,
 564                      "orangefs_file_mmap: called on %s\n",
 565                      (file ?
 566                         (char *)file->f_path.dentry->d_name.name :
 567                         (char *)"Unknown"));
 568
 569         /* set the sequential readahead hint */
 570         vma->vm_flags |= VM_SEQ_READ;
 571         vma->vm_flags &= ~VM_RAND_READ;
 572
 573         /* Use readonly mmap since we cannot support writable maps. */
 574         return generic_file_readonly_mmap(file, vma);
 575 }
 576
 577 #define mapping_nrpages(idata) ((idata)->nrpages)
 578
 579 /*
 580  * Called to notify the module that there are no more references to
 581  * this file (i.e. no processes have it open).
 582  *
 583  * \note Not called when each file is closed.
 584  */
 585 static int orangefs_file_release(struct inode *inode, struct file *file)
 586 {
 587         gossip_debug(GOSSIP_FILE_DEBUG,
 588                      "orangefs_file_release: called on %s\n",
 589                      file->f_path.dentry->d_name.name);
 590
 591         orangefs_flush_inode(inode);
 592
 593         /*
 594          * remove all associated inode pages from the page cache and mmap
 595          * readahead cache (if any); this forces an expensive refresh of
 596          * data for the next caller of mmap (or 'get_block' accesses)
 597          */
 598         if (file->f_path.dentry->d_inode &&
 599             file->f_path.dentry->d_inode->i_mapping &&
 600             mapping_nrpages(&file->f_path.dentry->d_inode->i_data))
 601                 truncate_inode_pages(file->f_path.dentry->d_inode->i_mapping,
 602                                      0);
 603         return 0;
 604 }
 605
 606 /*
 607  * Push all data for a specific file onto permanent storage.
 608  */
 609 static int orangefs_fsync(struct file *file,
 610                        loff_t start,
 611                        loff_t end,
 612                        int datasync)
 613 {
 614         int ret = -EINVAL;
 615         struct orangefs_inode_s *orangefs_inode =
 616                 ORANGEFS_I(file->f_path.dentry->d_inode);
 617         struct orangefs_kernel_op_s *new_op = NULL;
 618
 619         /* required call */
 620         filemap_write_and_wait_range(file->f_mapping, start, end);
 621
 622         new_op = op_alloc(ORANGEFS_VFS_OP_FSYNC);
 623         if (!new_op)
 624                 return -ENOMEM;
 625         new_op->upcall.req.fsync.refn = orangefs_inode->refn;
 626
 627         ret = service_operation(new_op,
 628                         "orangefs_fsync",
 629                         get_interruptible_flag(file->f_path.dentry->d_inode));
 630
 631         gossip_debug(GOSSIP_FILE_DEBUG,
 632                      "orangefs_fsync got return value of %d\n",
 633                      ret);
 634
 635         op_release(new_op);
 636
 637         orangefs_flush_inode(file->f_path.dentry->d_inode);
 638         return ret;
 639 }
 640
 641 /*
 642  * Change the file pointer position for an instance of an open file.
 643  *
 644  * \note If .llseek is overriden, we must acquire lock as described in
 645  *       Documentation/filesystems/Locking.
 646  *
 647  * Future upgrade could support SEEK_DATA and SEEK_HOLE but would
 648  * require much changes to the FS
 649  */
 650 static loff_t orangefs_file_llseek(struct file *file, loff_t offset, int origin)
 651 {
 652         int ret = -EINVAL;
 653         struct inode *inode = file_inode(file);
 654
 655         if (origin == SEEK_END) {
 656                 /*
 657                  * revalidate the inode's file size.
 658                  * NOTE: We are only interested in file size here,
 659                  * so we set mask accordingly.
 660                  */
 661                 ret = orangefs_inode_getattr(file->f_mapping->host, 0, 1);
 662                 if (ret == -ESTALE)
 663                         ret = -EIO;
 664                 if (ret) {
 665                         gossip_debug(GOSSIP_FILE_DEBUG,
 666                                      "%s:%s:%d calling make bad inode\n",
 667                                      __FILE__,
 668                                      __func__,
 669                                      __LINE__);
 670                         return ret;
 671                 }
 672         }
 673
 674         gossip_debug(GOSSIP_FILE_DEBUG,
 675                      "orangefs_file_llseek: offset is %ld | origin is %d"
 676                      " | inode size is %lu\n",
 677                      (long)offset,
 678                      origin,
 679                      (unsigned long)i_size_read(inode));
 680
 681         return generic_file_llseek(file, offset, origin);
 682 }
 683
 684 /*
 685  * Support local locks (locks that only this kernel knows about)
 686  * if Orangefs was mounted -o local_lock.
 687  */
 688 static int orangefs_lock(struct file *filp, int cmd, struct file_lock *fl)
 689 {
 690         int rc = -EINVAL;
 691
 692         if (ORANGEFS_SB(filp->f_inode->i_sb)->flags & ORANGEFS_OPT_LOCAL_LOCK) {
 693                 if (cmd == F_GETLK) {
 694                         rc = 0;
 695                         posix_test_lock(filp, fl);
 696                 } else {
 697                         rc = posix_lock_file(filp, fl, NULL);
 698                 }
 699         }
 700
 701         return rc;
 702 }
 703
 704 /** ORANGEFS implementation of VFS file operations */
 705 const struct file_operations orangefs_file_operations = {
 706         .llseek         = orangefs_file_llseek,
 707         .read_iter      = orangefs_file_read_iter,
 708         .write_iter     = orangefs_file_write_iter,
 709         .lock           = orangefs_lock,
 710         .unlocked_ioctl = orangefs_ioctl,
 711         .mmap           = orangefs_file_mmap,
 712         .open           = generic_file_open,
 713         .release        = orangefs_file_release,
 714         .fsync          = orangefs_fsync,
 715 };