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 "pvfs2-kernel.h"
  13 #include "pvfs2-bufmap.h"
  14 #include <linux/fs.h>
  15 #include <linux/pagemap.h>
  16
  17 #define wake_up_daemon_for_return(op)                   \
  18 do {                                                    \
  19         spin_lock(&op->lock);                           \
  20         op->io_completed = 1;                           \
  21         spin_unlock(&op->lock);                         \
  22         wake_up_interruptible(&op->io_completion_waitq);\
  23 } while (0)
  24
  25 /*
  26  * Copy to client-core's address space from the buffers specified
  27  * by the iovec upto total_size bytes.
  28  * NOTE: the iovector can either contain addresses which
  29  *       can futher be kernel-space or user-space addresses.
  30  *       or it can pointers to struct page's
  31  */
  32 static int precopy_buffers(struct pvfs2_bufmap *bufmap,
  33                            int buffer_index,
  34                            struct iov_iter *iter,
  35                            size_t total_size)
  36 {
  37         int ret = 0;
  38         /*
  39          * copy data from application/kernel by pulling it out
  40          * of the iovec.
  41          */
  42
  43
  44         if (total_size) {
  45                 ret = pvfs_bufmap_copy_from_iovec(bufmap,
  46                                                 iter,
  47                                                 buffer_index,
  48                                                 total_size);
  49                 if (ret < 0)
  50                 gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
  51                            __func__,
  52                            (long)ret);
  53         }
  54
  55         if (ret < 0)
  56                 gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
  57                         __func__,
  58                         (long)ret);
  59         return ret;
  60 }
  61
  62 /*
  63  * Copy from client-core's address space to the buffers specified
  64  * by the iovec upto total_size bytes.
  65  * NOTE: the iovector can either contain addresses which
  66  *       can futher be kernel-space or user-space addresses.
  67  *       or it can pointers to struct page's
  68  */
  69 static int postcopy_buffers(struct pvfs2_bufmap *bufmap,
  70                             int buffer_index,
  71                             struct iov_iter *iter,
  72                             size_t total_size)
  73 {
  74         int ret = 0;
  75         /*
  76          * copy data to application/kernel by pushing it out to
  77          * the iovec. NOTE; target buffers can be addresses or
  78          * struct page pointers.
  79          */
  80         if (total_size) {
  81                 ret = pvfs_bufmap_copy_to_iovec(bufmap,
  82                                                 iter,
  83                                                 buffer_index,
  84                                                 total_size);
  85                 if (ret < 0)
  86                         gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
  87                                 __func__,
  88                                 (long)ret);
  89         }
  90         return ret;
  91 }
  92
  93 /*
  94  * Post and wait for the I/O upcall to finish
  95  */
  96 static ssize_t wait_for_direct_io(enum PVFS_io_type type, struct inode *inode,
  97                 loff_t *offset, struct iov_iter *iter,
  98                 size_t total_size, loff_t readahead_size)
  99 {
 100         struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
 101         struct pvfs2_khandle *handle = &pvfs2_inode->refn.khandle;
 102         struct pvfs2_bufmap *bufmap = NULL;
 103         struct pvfs2_kernel_op_s *new_op = NULL;
 104         int buffer_index = -1;
 105         ssize_t ret;
 106
 107         new_op = op_alloc(PVFS2_VFS_OP_FILE_IO);
 108         if (!new_op) {
 109                 ret = -ENOMEM;
 110                 goto out;
 111         }
 112         /* synchronous I/O */
 113         new_op->upcall.req.io.async_vfs_io = PVFS_VFS_SYNC_IO;
 114         new_op->upcall.req.io.readahead_size = readahead_size;
 115         new_op->upcall.req.io.io_type = type;
 116         new_op->upcall.req.io.refn = pvfs2_inode->refn;
 117
 118 populate_shared_memory:
 119         /* get a shared buffer index */
 120         ret = pvfs_bufmap_get(&bufmap, &buffer_index);
 121         if (ret < 0) {
 122                 gossip_debug(GOSSIP_FILE_DEBUG,
 123                              "%s: pvfs_bufmap_get failure (%ld)\n",
 124                              __func__, (long)ret);
 125                 goto out;
 126         }
 127         gossip_debug(GOSSIP_FILE_DEBUG,
 128                      "%s(%pU): GET op %p -> buffer_index %d\n",
 129                      __func__,
 130                      handle,
 131                      new_op,
 132                      buffer_index);
 133
 134         new_op->uses_shared_memory = 1;
 135         new_op->upcall.req.io.buf_index = buffer_index;
 136         new_op->upcall.req.io.count = total_size;
 137         new_op->upcall.req.io.offset = *offset;
 138
 139         gossip_debug(GOSSIP_FILE_DEBUG,
 140                      "%s(%pU): offset: %llu total_size: %zd\n",
 141                      __func__,
 142                      handle,
 143                      llu(*offset),
 144                      total_size);
 145         /*
 146          * Stage 1: copy the buffers into client-core's address space
 147          * precopy_buffers only pertains to writes.
 148          */
 149         if (type == PVFS_IO_WRITE) {
 150                 ret = precopy_buffers(bufmap,
 151                                       buffer_index,
 152                                       iter,
 153                                       total_size);
 154                 if (ret < 0)
 155                         goto out;
 156         }
 157
 158         gossip_debug(GOSSIP_FILE_DEBUG,
 159                      "%s(%pU): Calling post_io_request with tag (%llu)\n",
 160                      __func__,
 161                      handle,
 162                      llu(new_op->tag));
 163
 164         /* Stage 2: Service the I/O operation */
 165         ret = service_operation(new_op,
 166                                 type == PVFS_IO_WRITE ?
 167                                         "file_write" :
 168                                         "file_read",
 169                                 get_interruptible_flag(inode));
 170
 171         /*
 172          * If service_operation() returns -EAGAIN #and# the operation was
 173          * purged from pvfs2_request_list or htable_ops_in_progress, then
 174          * we know that the client was restarted, causing the shared memory
 175          * area to be wiped clean.  To restart a  write operation in this
 176          * case, we must re-copy the data from the user's iovec to a NEW
 177          * shared memory location. To restart a read operation, we must get
 178          * a new shared memory location.
 179          */
 180         if (ret == -EAGAIN && op_state_purged(new_op)) {
 181                 pvfs_bufmap_put(bufmap, buffer_index);
 182                 gossip_debug(GOSSIP_FILE_DEBUG,
 183                              "%s:going to repopulate_shared_memory.\n",
 184                              __func__);
 185                 goto populate_shared_memory;
 186         }
 187
 188         if (ret < 0) {
 189                 handle_io_error(); /* defined in pvfs2-kernel.h */
 190                 /*
 191                  * don't write an error to syslog on signaled operation
 192                  * termination unless we've got debugging turned on, as
 193                  * this can happen regularly (i.e. ctrl-c)
 194                  */
 195                 if (ret == -EINTR)
 196                         gossip_debug(GOSSIP_FILE_DEBUG,
 197                                      "%s: returning error %ld\n", __func__,
 198                                      (long)ret);
 199                 else
 200                         gossip_err("%s: error in %s handle %pU, returning %zd\n",
 201                                 __func__,
 202                                 type == PVFS_IO_READ ?
 203                                         "read from" : "write to",
 204                                 handle, ret);
 205                 goto out;
 206         }
 207
 208         /*
 209          * Stage 3: Post copy buffers from client-core's address space
 210          * postcopy_buffers only pertains to reads.
 211          */
 212         if (type == PVFS_IO_READ) {
 213                 ret = postcopy_buffers(bufmap,
 214                                        buffer_index,
 215                                        iter,
 216                                        new_op->downcall.resp.io.amt_complete);
 217                 if (ret < 0) {
 218                         /*
 219                          * put error codes in downcall so that handle_io_error()
 220                          * preserves it properly
 221                          */
 222                         new_op->downcall.status = ret;
 223                         handle_io_error();
 224                         goto out;
 225                 }
 226         }
 227         gossip_debug(GOSSIP_FILE_DEBUG,
 228             "%s(%pU): Amount written as returned by the sys-io call:%d\n",
 229             __func__,
 230             handle,
 231             (int)new_op->downcall.resp.io.amt_complete);
 232
 233         ret = new_op->downcall.resp.io.amt_complete;
 234
 235         /*
 236          * tell the device file owner waiting on I/O that this read has
 237          * completed and it can return now.  in this exact case, on
 238          * wakeup the daemon will free the op, so we *cannot* touch it
 239          * after this.
 240          */
 241         wake_up_daemon_for_return(new_op);
 242         new_op = NULL;
 243
 244 out:
 245         if (buffer_index >= 0) {
 246                 pvfs_bufmap_put(bufmap, buffer_index);
 247                 gossip_debug(GOSSIP_FILE_DEBUG,
 248                              "%s(%pU): PUT buffer_index %d\n",
 249                              __func__, handle, buffer_index);
 250                 buffer_index = -1;
 251         }
 252         if (new_op) {
 253                 op_release(new_op);
 254                 new_op = NULL;
 255         }
 256         return ret;
 257 }
 258
 259 /*
 260  * Common entry point for read/write/readv/writev
 261  * This function will dispatch it to either the direct I/O
 262  * or buffered I/O path depending on the mount options and/or
 263  * augmented/extended metadata attached to the file.
 264  * Note: File extended attributes override any mount options.
 265  */
 266 static ssize_t do_readv_writev(enum PVFS_io_type type, struct file *file,
 267                 loff_t *offset, struct iov_iter *iter)
 268 {
 269         struct inode *inode = file->f_mapping->host;
 270         struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
 271         struct pvfs2_khandle *handle = &pvfs2_inode->refn.khandle;
 272         size_t count = iov_iter_count(iter);
 273         ssize_t total_count = 0;
 274         ssize_t ret = -EINVAL;
 275
 276         gossip_debug(GOSSIP_FILE_DEBUG,
 277                 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
 278                 __func__,
 279                 handle,
 280                 (int)count);
 281
 282         if (type == PVFS_IO_WRITE) {
 283                 gossip_debug(GOSSIP_FILE_DEBUG,
 284                              "%s(%pU): proceeding with offset : %llu, "
 285                              "size %d\n",
 286                              __func__,
 287                              handle,
 288                              llu(*offset),
 289                              (int)count);
 290         }
 291
 292         if (count == 0) {
 293                 ret = 0;
 294                 goto out;
 295         }
 296
 297         while (iov_iter_count(iter)) {
 298                 size_t each_count = iov_iter_count(iter);
 299                 size_t amt_complete;
 300
 301                 /* how much to transfer in this loop iteration */
 302                 if (each_count > pvfs_bufmap_size_query())
 303                         each_count = pvfs_bufmap_size_query();
 304
 305                 gossip_debug(GOSSIP_FILE_DEBUG,
 306                              "%s(%pU): size of each_count(%d)\n",
 307                              __func__,
 308                              handle,
 309                              (int)each_count);
 310                 gossip_debug(GOSSIP_FILE_DEBUG,
 311                              "%s(%pU): BEFORE wait_for_io: offset is %d\n",
 312                              __func__,
 313                              handle,
 314                              (int)*offset);
 315
 316                 ret = wait_for_direct_io(type, inode, offset, iter,
 317                                 each_count, 0);
 318                 gossip_debug(GOSSIP_FILE_DEBUG,
 319                              "%s(%pU): return from wait_for_io:%d\n",
 320                              __func__,
 321                              handle,
 322                              (int)ret);
 323
 324                 if (ret < 0)
 325                         goto out;
 326
 327                 *offset += ret;
 328                 total_count += ret;
 329                 amt_complete = ret;
 330
 331                 gossip_debug(GOSSIP_FILE_DEBUG,
 332                              "%s(%pU): AFTER wait_for_io: offset is %d\n",
 333                              __func__,
 334                              handle,
 335                              (int)*offset);
 336
 337                 /*
 338                  * if we got a short I/O operations,
 339                  * fall out and return what we got so far
 340                  */
 341                 if (amt_complete < each_count)
 342                         break;
 343         } /*end while */
 344
 345         if (total_count > 0)
 346                 ret = total_count;
 347 out:
 348         if (ret > 0) {
 349                 if (type == PVFS_IO_READ) {
 350                         file_accessed(file);
 351                 } else {
 352                         SetMtimeFlag(pvfs2_inode);
 353                         inode->i_mtime = CURRENT_TIME;
 354                         mark_inode_dirty_sync(inode);
 355                 }
 356         }
 357
 358         gossip_debug(GOSSIP_FILE_DEBUG,
 359                      "%s(%pU): Value(%d) returned.\n",
 360                      __func__,
 361                      handle,
 362                      (int)ret);
 363
 364         return ret;
 365 }
 366
 367 /*
 368  * Read data from a specified offset in a file (referenced by inode).
 369  * Data may be placed either in a user or kernel buffer.
 370  */
 371 ssize_t pvfs2_inode_read(struct inode *inode,
 372                          struct iov_iter *iter,
 373                          loff_t *offset,
 374                          loff_t readahead_size)
 375 {
 376         struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
 377         size_t count = iov_iter_count(iter);
 378         size_t bufmap_size;
 379         ssize_t ret = -EINVAL;
 380
 381         g_pvfs2_stats.reads++;
 382
 383         bufmap_size = pvfs_bufmap_size_query();
 384         if (count > bufmap_size) {
 385                 gossip_debug(GOSSIP_FILE_DEBUG,
 386                              "%s: count is too large (%zd/%zd)!\n",
 387                              __func__, count, bufmap_size);
 388                 return -EINVAL;
 389         }
 390
 391         gossip_debug(GOSSIP_FILE_DEBUG,
 392                      "%s(%pU) %zd@%llu\n",
 393                      __func__,
 394                      &pvfs2_inode->refn.khandle,
 395                      count,
 396                      llu(*offset));
 397
 398         ret = wait_for_direct_io(PVFS_IO_READ, inode, offset, iter,
 399                         count, readahead_size);
 400         if (ret > 0)
 401                 *offset += ret;
 402
 403         gossip_debug(GOSSIP_FILE_DEBUG,
 404                      "%s(%pU): Value(%zd) returned.\n",
 405                      __func__,
 406                      &pvfs2_inode->refn.khandle,
 407                      ret);
 408
 409         return ret;
 410 }
 411
 412 static ssize_t pvfs2_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
 413 {
 414         struct file *file = iocb->ki_filp;
 415         loff_t pos = *(&iocb->ki_pos);
 416         ssize_t rc = 0;
 417
 418         BUG_ON(iocb->private);
 419
 420         gossip_debug(GOSSIP_FILE_DEBUG, "pvfs2_file_read_iter\n");
 421
 422         g_pvfs2_stats.reads++;
 423
 424         rc = do_readv_writev(PVFS_IO_READ, file, &pos, iter);
 425         iocb->ki_pos = pos;
 426
 427         return rc;
 428 }
 429
 430 static ssize_t pvfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
 431 {
 432         struct file *file = iocb->ki_filp;
 433         loff_t pos;
 434         ssize_t rc;
 435
 436         BUG_ON(iocb->private);
 437
 438         gossip_debug(GOSSIP_FILE_DEBUG, "pvfs2_file_write_iter\n");
 439
 440         mutex_lock(&file->f_mapping->host->i_mutex);
 441
 442         /* Make sure generic_write_checks sees an up to date inode size. */
 443         if (file->f_flags & O_APPEND) {
 444                 rc = pvfs2_inode_getattr(file->f_mapping->host,
 445                                          PVFS_ATTR_SYS_SIZE);
 446                 if (rc) {
 447                         gossip_err("%s: pvfs2_inode_getattr failed, rc:%zd:.\n",
 448                                    __func__, rc);
 449                         goto out;
 450                 }
 451         }
 452
 453         if (file->f_pos > i_size_read(file->f_mapping->host))
 454                 pvfs2_i_size_write(file->f_mapping->host, file->f_pos);
 455
 456         rc = generic_write_checks(iocb, iter);
 457
 458         if (rc <= 0) {
 459                 gossip_err("%s: generic_write_checks failed, rc:%zd:.\n",
 460                            __func__, rc);
 461                 goto out;
 462         }
 463
 464         /*
 465          * if we are appending, generic_write_checks would have updated
 466          * pos to the end of the file, so we will wait till now to set
 467          * pos...
 468          */
 469         pos = *(&iocb->ki_pos);
 470
 471         rc = do_readv_writev(PVFS_IO_WRITE,
 472                              file,
 473                              &pos,
 474                              iter);
 475         if (rc < 0) {
 476                 gossip_err("%s: do_readv_writev failed, rc:%zd:.\n",
 477                            __func__, rc);
 478                 goto out;
 479         }
 480
 481         iocb->ki_pos = pos;
 482         g_pvfs2_stats.writes++;
 483
 484 out:
 485
 486         mutex_unlock(&file->f_mapping->host->i_mutex);
 487         return rc;
 488 }
 489
 490 /*
 491  * Perform a miscellaneous operation on a file.
 492  */
 493 static long pvfs2_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 494 {
 495         int ret = -ENOTTY;
 496         __u64 val = 0;
 497         unsigned long uval;
 498
 499         gossip_debug(GOSSIP_FILE_DEBUG,
 500                      "pvfs2_ioctl: called with cmd %d\n",
 501                      cmd);
 502
 503         /*
 504          * we understand some general ioctls on files, such as the immutable
 505          * and append flags
 506          */
 507         if (cmd == FS_IOC_GETFLAGS) {
 508                 val = 0;
 509                 ret = pvfs2_xattr_get_default(file->f_path.dentry,
 510                                               "user.pvfs2.meta_hint",
 511                                               &val,
 512                                               sizeof(val),
 513                                               0);
 514                 if (ret < 0 && ret != -ENODATA)
 515                         return ret;
 516                 else if (ret == -ENODATA)
 517                         val = 0;
 518                 uval = val;
 519                 gossip_debug(GOSSIP_FILE_DEBUG,
 520                              "pvfs2_ioctl: FS_IOC_GETFLAGS: %llu\n",
 521                              (unsigned long long)uval);
 522                 return put_user(uval, (int __user *)arg);
 523         } else if (cmd == FS_IOC_SETFLAGS) {
 524                 ret = 0;
 525                 if (get_user(uval, (int __user *)arg))
 526                         return -EFAULT;
 527                 /*
 528                  * PVFS_MIRROR_FL is set internally when the mirroring mode
 529                  * is turned on for a file. The user is not allowed to turn
 530                  * on this bit, but the bit is present if the user first gets
 531                  * the flags and then updates the flags with some new
 532                  * settings. So, we ignore it in the following edit. bligon.
 533                  */
 534                 if ((uval & ~PVFS_MIRROR_FL) &
 535                     (~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL))) {
 536                         gossip_err("pvfs2_ioctl: the FS_IOC_SETFLAGS only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n");
 537                         return -EINVAL;
 538                 }
 539                 val = uval;
 540                 gossip_debug(GOSSIP_FILE_DEBUG,
 541                              "pvfs2_ioctl: FS_IOC_SETFLAGS: %llu\n",
 542                              (unsigned long long)val);
 543                 ret = pvfs2_xattr_set_default(file->f_path.dentry,
 544                                               "user.pvfs2.meta_hint",
 545                                               &val,
 546                                               sizeof(val),
 547                                               0,
 548                                               0);
 549         }
 550
 551         return ret;
 552 }
 553
 554 /*
 555  * Memory map a region of a file.
 556  */
 557 static int pvfs2_file_mmap(struct file *file, struct vm_area_struct *vma)
 558 {
 559         gossip_debug(GOSSIP_FILE_DEBUG,
 560                      "pvfs2_file_mmap: called on %s\n",
 561                      (file ?
 562                         (char *)file->f_path.dentry->d_name.name :
 563                         (char *)"Unknown"));
 564
 565         /* set the sequential readahead hint */
 566         vma->vm_flags |= VM_SEQ_READ;
 567         vma->vm_flags &= ~VM_RAND_READ;
 568
 569         /* Use readonly mmap since we cannot support writable maps. */
 570         return generic_file_readonly_mmap(file, vma);
 571 }
 572
 573 #define mapping_nrpages(idata) ((idata)->nrpages)
 574
 575 /*
 576  * Called to notify the module that there are no more references to
 577  * this file (i.e. no processes have it open).
 578  *
 579  * \note Not called when each file is closed.
 580  */
 581 static int pvfs2_file_release(struct inode *inode, struct file *file)
 582 {
 583         gossip_debug(GOSSIP_FILE_DEBUG,
 584                      "pvfs2_file_release: called on %s\n",
 585                      file->f_path.dentry->d_name.name);
 586
 587         pvfs2_flush_inode(inode);
 588
 589         /*
 590          * remove all associated inode pages from the page cache and mmap
 591          * readahead cache (if any); this forces an expensive refresh of
 592          * data for the next caller of mmap (or 'get_block' accesses)
 593          */
 594         if (file->f_path.dentry->d_inode &&
 595             file->f_path.dentry->d_inode->i_mapping &&
 596             mapping_nrpages(&file->f_path.dentry->d_inode->i_data))
 597                 truncate_inode_pages(file->f_path.dentry->d_inode->i_mapping,
 598                                      0);
 599         return 0;
 600 }
 601
 602 /*
 603  * Push all data for a specific file onto permanent storage.
 604  */
 605 static int pvfs2_fsync(struct file *file,
 606                        loff_t start,
 607                        loff_t end,
 608                        int datasync)
 609 {
 610         int ret = -EINVAL;
 611         struct pvfs2_inode_s *pvfs2_inode =
 612                 PVFS2_I(file->f_path.dentry->d_inode);
 613         struct pvfs2_kernel_op_s *new_op = NULL;
 614
 615         /* required call */
 616         filemap_write_and_wait_range(file->f_mapping, start, end);
 617
 618         new_op = op_alloc(PVFS2_VFS_OP_FSYNC);
 619         if (!new_op)
 620                 return -ENOMEM;
 621         new_op->upcall.req.fsync.refn = pvfs2_inode->refn;
 622
 623         ret = service_operation(new_op,
 624                         "pvfs2_fsync",
 625                         get_interruptible_flag(file->f_path.dentry->d_inode));
 626
 627         gossip_debug(GOSSIP_FILE_DEBUG,
 628                      "pvfs2_fsync got return value of %d\n",
 629                      ret);
 630
 631         op_release(new_op);
 632
 633         pvfs2_flush_inode(file->f_path.dentry->d_inode);
 634         return ret;
 635 }
 636
 637 /*
 638  * Change the file pointer position for an instance of an open file.
 639  *
 640  * \note If .llseek is overriden, we must acquire lock as described in
 641  *       Documentation/filesystems/Locking.
 642  *
 643  * Future upgrade could support SEEK_DATA and SEEK_HOLE but would
 644  * require much changes to the FS
 645  */
 646 static loff_t pvfs2_file_llseek(struct file *file, loff_t offset, int origin)
 647 {
 648         int ret = -EINVAL;
 649         struct inode *inode = file->f_path.dentry->d_inode;
 650
 651         if (!inode) {
 652                 gossip_err("pvfs2_file_llseek: invalid inode (NULL)\n");
 653                 return ret;
 654         }
 655
 656         if (origin == PVFS2_SEEK_END) {
 657                 /*
 658                  * revalidate the inode's file size.
 659                  * NOTE: We are only interested in file size here,
 660                  * so we set mask accordingly.
 661                  */
 662                 ret = pvfs2_inode_getattr(inode, PVFS_ATTR_SYS_SIZE);
 663                 if (ret) {
 664                         gossip_debug(GOSSIP_FILE_DEBUG,
 665                                      "%s:%s:%d calling make bad inode\n",
 666                                      __FILE__,
 667                                      __func__,
 668                                      __LINE__);
 669                         pvfs2_make_bad_inode(inode);
 670                         return ret;
 671                 }
 672         }
 673
 674         gossip_debug(GOSSIP_FILE_DEBUG,
 675                      "pvfs2_file_llseek: offset is %ld | origin is %d"
 676                      " | inode size is %lu\n",
 677                      (long)offset,
 678                      origin,
 679                      (unsigned long)file->f_path.dentry->d_inode->i_size);
 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 pvfs2_lock(struct file *filp, int cmd, struct file_lock *fl)
 689 {
 690         int rc = -EINVAL;
 691
 692         if (PVFS2_SB(filp->f_inode->i_sb)->flags & PVFS2_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 /** PVFS2 implementation of VFS file operations */
 705 const struct file_operations pvfs2_file_operations = {
 706         .llseek         = pvfs2_file_llseek,
 707         .read_iter      = pvfs2_file_read_iter,
 708         .write_iter     = pvfs2_file_write_iter,
 709         .lock           = pvfs2_lock,
 710         .unlocked_ioctl = pvfs2_ioctl,
 711         .mmap           = pvfs2_file_mmap,
 712         .open           = generic_file_open,
 713         .release        = pvfs2_file_release,
 714         .fsync          = pvfs2_fsync,
 715 };