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