fs/gfs2/ops_file.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License version 2.
   8  */
   9
  10 #include <linux/sched.h>
  11 #include <linux/slab.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/completion.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/pagemap.h>
  16 #include <linux/uio.h>
  17 #include <linux/blkdev.h>
  18 #include <linux/mm.h>
  19 #include <linux/smp_lock.h>
  20 #include <linux/fs.h>
  21 #include <linux/gfs2_ondisk.h>
  22 #include <linux/ext2_fs.h>
  23 #include <linux/crc32.h>
  24 #include <linux/lm_interface.h>
  25 #include <asm/uaccess.h>
  26
  27 #include "gfs2.h"
  28 #include "incore.h"
  29 #include "bmap.h"
  30 #include "dir.h"
  31 #include "glock.h"
  32 #include "glops.h"
  33 #include "inode.h"
  34 #include "lm.h"
  35 #include "log.h"
  36 #include "meta_io.h"
  37 #include "ops_file.h"
  38 #include "ops_vm.h"
  39 #include "quota.h"
  40 #include "rgrp.h"
  41 #include "trans.h"
  42 #include "util.h"
  43 #include "eaops.h"
  44
  45 /* For regular, non-NFS */
  46 struct filldir_reg {
  47         struct gfs2_sbd *fdr_sbd;
  48         int fdr_prefetch;
  49
  50         filldir_t fdr_filldir;
  51         void *fdr_opaque;
  52 };
  53
  54 /*
  55  * Most fields left uninitialised to catch anybody who tries to
  56  * use them. f_flags set to prevent file_accessed() from touching
  57  * any other part of this. Its use is purely as a flag so that we
  58  * know (in readpage()) whether or not do to locking.
  59  */
  60 struct file gfs2_internal_file_sentinel = {
  61         .f_flags = O_NOATIME|O_RDONLY,
  62 };
  63
  64 static int gfs2_read_actor(read_descriptor_t *desc, struct page *page,
  65                            unsigned long offset, unsigned long size)
  66 {
  67         char *kaddr;
  68         unsigned long count = desc->count;
  69
  70         if (size > count)
  71                 size = count;
  72
  73         kaddr = kmap(page);
  74         memcpy(desc->arg.data, kaddr + offset, size);
  75         kunmap(page);
  76
  77         desc->count = count - size;
  78         desc->written += size;
  79         desc->arg.buf += size;
  80         return size;
  81 }
  82
  83 int gfs2_internal_read(struct gfs2_inode *ip, struct file_ra_state *ra_state,
  84                        char *buf, loff_t *pos, unsigned size)
  85 {
  86         struct inode *inode = &ip->i_inode;
  87         read_descriptor_t desc;
  88         desc.written = 0;
  89         desc.arg.data = buf;
  90         desc.count = size;
  91         desc.error = 0;
  92         do_generic_mapping_read(inode->i_mapping, ra_state,
  93                                 &gfs2_internal_file_sentinel, pos, &desc,
  94                                 gfs2_read_actor);
  95         return desc.written ? desc.written : desc.error;
  96 }
  97
  98 /**
  99  * gfs2_llseek - seek to a location in a file
 100  * @file: the file
 101  * @offset: the offset
 102  * @origin: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END)
 103  *
 104  * SEEK_END requires the glock for the file because it references the
 105  * file's size.
 106  *
 107  * Returns: The new offset, or errno
 108  */
 109
 110 static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin)
 111 {
 112         struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
 113         struct gfs2_holder i_gh;
 114         loff_t error;
 115
 116         if (origin == 2) {
 117                 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
 118                                            &i_gh);
 119                 if (!error) {
 120                         error = remote_llseek(file, offset, origin);
 121                         gfs2_glock_dq_uninit(&i_gh);
 122                 }
 123         } else
 124                 error = remote_llseek(file, offset, origin);
 125
 126         return error;
 127 }
 128
 129 /**
 130  * filldir_func - Report a directory entry to the caller of gfs2_dir_read()
 131  * @opaque: opaque data used by the function
 132  * @name: the name of the directory entry
 133  * @length: the length of the name
 134  * @offset: the entry's offset in the directory
 135  * @inum: the inode number the entry points to
 136  * @type: the type of inode the entry points to
 137  *
 138  * Returns: 0 on success, 1 if buffer full
 139  */
 140
 141 static int filldir_func(void *opaque, const char *name, unsigned int length,
 142                         u64 offset, struct gfs2_inum_host *inum,
 143                         unsigned int type)
 144 {
 145         struct filldir_reg *fdr = (struct filldir_reg *)opaque;
 146         struct gfs2_sbd *sdp = fdr->fdr_sbd;
 147         int error;
 148
 149         error = fdr->fdr_filldir(fdr->fdr_opaque, name, length, offset,
 150                                  inum->no_addr, type);
 151         if (error)
 152                 return 1;
 153
 154         if (fdr->fdr_prefetch && !(length == 1 && *name == '.')) {
 155                 gfs2_glock_prefetch_num(sdp, inum->no_addr, &gfs2_inode_glops,
 156                                        LM_ST_SHARED, LM_FLAG_TRY | LM_FLAG_ANY);
 157                 gfs2_glock_prefetch_num(sdp, inum->no_addr, &gfs2_iopen_glops,
 158                                        LM_ST_SHARED, LM_FLAG_TRY);
 159         }
 160
 161         return 0;
 162 }
 163
 164 /**
 165  * gfs2_readdir - Read directory entries from a directory
 166  * @file: The directory to read from
 167  * @dirent: Buffer for dirents
 168  * @filldir: Function used to do the copying
 169  *
 170  * Returns: errno
 171  */
 172
 173 static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir)
 174 {
 175         struct inode *dir = file->f_mapping->host;
 176         struct gfs2_inode *dip = GFS2_I(dir);
 177         struct filldir_reg fdr;
 178         struct gfs2_holder d_gh;
 179         u64 offset = file->f_pos;
 180         int error;
 181
 182         fdr.fdr_sbd = GFS2_SB(dir);
 183         fdr.fdr_prefetch = 1;
 184         fdr.fdr_filldir = filldir;
 185         fdr.fdr_opaque = dirent;
 186
 187         gfs2_holder_init(dip->i_gl, LM_ST_SHARED, GL_ATIME, &d_gh);
 188         error = gfs2_glock_nq_atime(&d_gh);
 189         if (error) {
 190                 gfs2_holder_uninit(&d_gh);
 191                 return error;
 192         }
 193
 194         error = gfs2_dir_read(dir, &offset, &fdr, filldir_func);
 195
 196         gfs2_glock_dq_uninit(&d_gh);
 197
 198         file->f_pos = offset;
 199
 200         return error;
 201 }
 202
 203 /**
 204  * fsflags_cvt
 205  * @table: A table of 32 u32 flags
 206  * @val: a 32 bit value to convert
 207  *
 208  * This function can be used to convert between fsflags values and
 209  * GFS2's own flags values.
 210  *
 211  * Returns: the converted flags
 212  */
 213 static u32 fsflags_cvt(const u32 *table, u32 val)
 214 {
 215         u32 res = 0;
 216         while(val) {
 217                 if (val & 1)
 218                         res |= *table;
 219                 table++;
 220                 val >>= 1;
 221         }
 222         return res;
 223 }
 224
 225 static const u32 fsflags_to_gfs2[32] = {
 226         [3] = GFS2_DIF_SYNC,
 227         [4] = GFS2_DIF_IMMUTABLE,
 228         [5] = GFS2_DIF_APPENDONLY,
 229         [7] = GFS2_DIF_NOATIME,
 230         [12] = GFS2_DIF_EXHASH,
 231         [14] = GFS2_DIF_JDATA,
 232         [20] = GFS2_DIF_DIRECTIO,
 233 };
 234
 235 static const u32 gfs2_to_fsflags[32] = {
 236         [gfs2fl_Sync] = FS_SYNC_FL,
 237         [gfs2fl_Immutable] = FS_IMMUTABLE_FL,
 238         [gfs2fl_AppendOnly] = FS_APPEND_FL,
 239         [gfs2fl_NoAtime] = FS_NOATIME_FL,
 240         [gfs2fl_ExHash] = FS_INDEX_FL,
 241         [gfs2fl_Jdata] = FS_JOURNAL_DATA_FL,
 242         [gfs2fl_Directio] = FS_DIRECTIO_FL,
 243         [gfs2fl_InheritDirectio] = FS_DIRECTIO_FL,
 244         [gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
 245 };
 246
 247 static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
 248 {
 249         struct inode *inode = filp->f_dentry->d_inode;
 250         struct gfs2_inode *ip = GFS2_I(inode);
 251         struct gfs2_holder gh;
 252         int error;
 253         u32 fsflags;
 254
 255         gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
 256         error = gfs2_glock_nq_m_atime(1, &gh);
 257         if (error)
 258                 return error;
 259
 260         fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_di.di_flags);
 261         if (put_user(fsflags, ptr))
 262                 error = -EFAULT;
 263
 264         gfs2_glock_dq_m(1, &gh);
 265         gfs2_holder_uninit(&gh);
 266         return error;
 267 }
 268
 269 /* Flags that can be set by user space */
 270 #define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA|                    \
 271                              GFS2_DIF_DIRECTIO|                 \
 272                              GFS2_DIF_IMMUTABLE|                \
 273                              GFS2_DIF_APPENDONLY|               \
 274                              GFS2_DIF_NOATIME|                  \
 275                              GFS2_DIF_SYNC|                     \
 276                              GFS2_DIF_SYSTEM|                   \
 277                              GFS2_DIF_INHERIT_DIRECTIO|         \
 278                              GFS2_DIF_INHERIT_JDATA)
 279
 280 /**
 281  * gfs2_set_flags - set flags on an inode
 282  * @inode: The inode
 283  * @flags: The flags to set
 284  * @mask: Indicates which flags are valid
 285  *
 286  */
 287 static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
 288 {
 289         struct inode *inode = filp->f_dentry->d_inode;
 290         struct gfs2_inode *ip = GFS2_I(inode);
 291         struct gfs2_sbd *sdp = GFS2_SB(inode);
 292         struct buffer_head *bh;
 293         struct gfs2_holder gh;
 294         int error;
 295         u32 new_flags, flags;
 296
 297         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 298         if (error)
 299                 return error;
 300
 301         flags = ip->i_di.di_flags;
 302         new_flags = (flags & ~mask) | (reqflags & mask);
 303         if ((new_flags ^ flags) == 0)
 304                 goto out;
 305
 306         if (S_ISDIR(inode->i_mode)) {
 307                 if ((new_flags ^ flags) & GFS2_DIF_JDATA)
 308                         new_flags ^= (GFS2_DIF_JDATA|GFS2_DIF_INHERIT_JDATA);
 309                 if ((new_flags ^ flags) & GFS2_DIF_DIRECTIO)
 310                         new_flags ^= (GFS2_DIF_DIRECTIO|GFS2_DIF_INHERIT_DIRECTIO);
 311         }
 312
 313         error = -EINVAL;
 314         if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET)
 315                 goto out;
 316
 317         error = -EPERM;
 318         if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE))
 319                 goto out;
 320         if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY))
 321                 goto out;
 322         if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) &&
 323             !capable(CAP_LINUX_IMMUTABLE))
 324                 goto out;
 325         if (!IS_IMMUTABLE(inode)) {
 326                 error = permission(inode, MAY_WRITE, NULL);
 327                 if (error)
 328                         goto out;
 329         }
 330
 331         error = gfs2_trans_begin(sdp, RES_DINODE, 0);
 332         if (error)
 333                 goto out;
 334         error = gfs2_meta_inode_buffer(ip, &bh);
 335         if (error)
 336                 goto out_trans_end;
 337         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 338         ip->i_di.di_flags = new_flags;
 339         gfs2_dinode_out(ip, bh->b_data);
 340         brelse(bh);
 341 out_trans_end:
 342         gfs2_trans_end(sdp);
 343 out:
 344         gfs2_glock_dq_uninit(&gh);
 345         return error;
 346 }
 347
 348 static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
 349 {
 350         u32 fsflags, gfsflags;
 351         if (get_user(fsflags, ptr))
 352                 return -EFAULT;
 353         gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
 354         return do_gfs2_set_flags(filp, gfsflags, ~0);
 355 }
 356
 357 static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 358 {
 359         switch(cmd) {
 360         case FS_IOC_GETFLAGS:
 361                 return gfs2_get_flags(filp, (u32 __user *)arg);
 362         case FS_IOC_SETFLAGS:
 363                 return gfs2_set_flags(filp, (u32 __user *)arg);
 364         }
 365         return -ENOTTY;
 366 }
 367
 368
 369 /**
 370  * gfs2_mmap -
 371  * @file: The file to map
 372  * @vma: The VMA which described the mapping
 373  *
 374  * Returns: 0 or error code
 375  */
 376
 377 static int gfs2_mmap(struct file *file, struct vm_area_struct *vma)
 378 {
 379         struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
 380         struct gfs2_holder i_gh;
 381         int error;
 382
 383         gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
 384         error = gfs2_glock_nq_atime(&i_gh);
 385         if (error) {
 386                 gfs2_holder_uninit(&i_gh);
 387                 return error;
 388         }
 389
 390         /* This is VM_MAYWRITE instead of VM_WRITE because a call
 391            to mprotect() can turn on VM_WRITE later. */
 392
 393         if ((vma->vm_flags & (VM_MAYSHARE | VM_MAYWRITE)) ==
 394             (VM_MAYSHARE | VM_MAYWRITE))
 395                 vma->vm_ops = &gfs2_vm_ops_sharewrite;
 396         else
 397                 vma->vm_ops = &gfs2_vm_ops_private;
 398
 399         gfs2_glock_dq_uninit(&i_gh);
 400
 401         return error;
 402 }
 403
 404 /**
 405  * gfs2_open - open a file
 406  * @inode: the inode to open
 407  * @file: the struct file for this opening
 408  *
 409  * Returns: errno
 410  */
 411
 412 static int gfs2_open(struct inode *inode, struct file *file)
 413 {
 414         struct gfs2_inode *ip = GFS2_I(inode);
 415         struct gfs2_holder i_gh;
 416         struct gfs2_file *fp;
 417         int error;
 418
 419         fp = kzalloc(sizeof(struct gfs2_file), GFP_KERNEL);
 420         if (!fp)
 421                 return -ENOMEM;
 422
 423         mutex_init(&fp->f_fl_mutex);
 424
 425         gfs2_assert_warn(GFS2_SB(inode), !file->private_data);
 426         file->private_data = fp;
 427
 428         if (S_ISREG(ip->i_inode.i_mode)) {
 429                 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
 430                                            &i_gh);
 431                 if (error)
 432                         goto fail;
 433
 434                 if (!(file->f_flags & O_LARGEFILE) &&
 435                     ip->i_di.di_size > MAX_NON_LFS) {
 436                         error = -EFBIG;
 437                         goto fail_gunlock;
 438                 }
 439
 440                 /* Listen to the Direct I/O flag */
 441
 442                 if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO)
 443                         file->f_flags |= O_DIRECT;
 444
 445                 gfs2_glock_dq_uninit(&i_gh);
 446         }
 447
 448         return 0;
 449
 450 fail_gunlock:
 451         gfs2_glock_dq_uninit(&i_gh);
 452 fail:
 453         file->private_data = NULL;
 454         kfree(fp);
 455         return error;
 456 }
 457
 458 /**
 459  * gfs2_close - called to close a struct file
 460  * @inode: the inode the struct file belongs to
 461  * @file: the struct file being closed
 462  *
 463  * Returns: errno
 464  */
 465
 466 static int gfs2_close(struct inode *inode, struct file *file)
 467 {
 468         struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
 469         struct gfs2_file *fp;
 470
 471         fp = file->private_data;
 472         file->private_data = NULL;
 473
 474         if (gfs2_assert_warn(sdp, fp))
 475                 return -EIO;
 476
 477         kfree(fp);
 478
 479         return 0;
 480 }
 481
 482 /**
 483  * gfs2_fsync - sync the dirty data for a file (across the cluster)
 484  * @file: the file that points to the dentry (we ignore this)
 485  * @dentry: the dentry that points to the inode to sync
 486  *
 487  * Returns: errno
 488  */
 489
 490 static int gfs2_fsync(struct file *file, struct dentry *dentry, int datasync)
 491 {
 492         struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
 493
 494         gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
 495
 496         return 0;
 497 }
 498
 499 /**
 500  * gfs2_lock - acquire/release a posix lock on a file
 501  * @file: the file pointer
 502  * @cmd: either modify or retrieve lock state, possibly wait
 503  * @fl: type and range of lock
 504  *
 505  * Returns: errno
 506  */
 507
 508 static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
 509 {
 510         struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
 511         struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
 512         struct lm_lockname name =
 513                 { .ln_number = ip->i_num.no_addr,
 514                   .ln_type = LM_TYPE_PLOCK };
 515
 516         if (!(fl->fl_flags & FL_POSIX))
 517                 return -ENOLCK;
 518         if ((ip->i_inode.i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
 519                 return -ENOLCK;
 520
 521         if (sdp->sd_args.ar_localflocks) {
 522                 if (IS_GETLK(cmd)) {
 523                         struct file_lock tmp;
 524                         int ret;
 525                         ret = posix_test_lock(file, fl, &tmp);
 526                         fl->fl_type = F_UNLCK;
 527                         if (ret)
 528                                 memcpy(fl, &tmp, sizeof(struct file_lock));
 529                         return 0;
 530                 } else {
 531                         return posix_lock_file_wait(file, fl);
 532                 }
 533         }
 534
 535         if (IS_GETLK(cmd))
 536                 return gfs2_lm_plock_get(sdp, &name, file, fl);
 537         else if (fl->fl_type == F_UNLCK)
 538                 return gfs2_lm_punlock(sdp, &name, file, fl);
 539         else
 540                 return gfs2_lm_plock(sdp, &name, file, cmd, fl);
 541 }
 542
 543 static int do_flock(struct file *file, int cmd, struct file_lock *fl)
 544 {
 545         struct gfs2_file *fp = file->private_data;
 546         struct gfs2_holder *fl_gh = &fp->f_fl_gh;
 547         struct gfs2_inode *ip = GFS2_I(file->f_dentry->d_inode);
 548         struct gfs2_glock *gl;
 549         unsigned int state;
 550         int flags;
 551         int error = 0;
 552
 553         state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
 554         flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE;
 555
 556         mutex_lock(&fp->f_fl_mutex);
 557
 558         gl = fl_gh->gh_gl;
 559         if (gl) {
 560                 if (fl_gh->gh_state == state)
 561                         goto out;
 562                 gfs2_glock_hold(gl);
 563                 flock_lock_file_wait(file,
 564                                      &(struct file_lock){.fl_type = F_UNLCK});
 565                 gfs2_glock_dq_uninit(fl_gh);
 566         } else {
 567                 error = gfs2_glock_get(GFS2_SB(&ip->i_inode),
 568                                       ip->i_num.no_addr, &gfs2_flock_glops,
 569                                       CREATE, &gl);
 570                 if (error)
 571                         goto out;
 572         }
 573
 574         gfs2_holder_init(gl, state, flags, fl_gh);
 575         gfs2_glock_put(gl);
 576
 577         error = gfs2_glock_nq(fl_gh);
 578         if (error) {
 579                 gfs2_holder_uninit(fl_gh);
 580                 if (error == GLR_TRYFAILED)
 581                         error = -EAGAIN;
 582         } else {
 583                 error = flock_lock_file_wait(file, fl);
 584                 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
 585         }
 586
 587 out:
 588         mutex_unlock(&fp->f_fl_mutex);
 589         return error;
 590 }
 591
 592 static void do_unflock(struct file *file, struct file_lock *fl)
 593 {
 594         struct gfs2_file *fp = file->private_data;
 595         struct gfs2_holder *fl_gh = &fp->f_fl_gh;
 596
 597         mutex_lock(&fp->f_fl_mutex);
 598         flock_lock_file_wait(file, fl);
 599         if (fl_gh->gh_gl)
 600                 gfs2_glock_dq_uninit(fl_gh);
 601         mutex_unlock(&fp->f_fl_mutex);
 602 }
 603
 604 /**
 605  * gfs2_flock - acquire/release a flock lock on a file
 606  * @file: the file pointer
 607  * @cmd: either modify or retrieve lock state, possibly wait
 608  * @fl: type and range of lock
 609  *
 610  * Returns: errno
 611  */
 612
 613 static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
 614 {
 615         struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
 616         struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
 617
 618         if (!(fl->fl_flags & FL_FLOCK))
 619                 return -ENOLCK;
 620         if ((ip->i_inode.i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
 621                 return -ENOLCK;
 622
 623         if (sdp->sd_args.ar_localflocks)
 624                 return flock_lock_file_wait(file, fl);
 625
 626         if (fl->fl_type == F_UNLCK) {
 627                 do_unflock(file, fl);
 628                 return 0;
 629         } else {
 630                 return do_flock(file, cmd, fl);
 631         }
 632 }
 633
 634 const struct file_operations gfs2_file_fops = {
 635         .llseek         = gfs2_llseek,
 636         .read           = do_sync_read,
 637         .aio_read       = generic_file_aio_read,
 638         .write          = do_sync_write,
 639         .aio_write      = generic_file_aio_write,
 640         .unlocked_ioctl = gfs2_ioctl,
 641         .mmap           = gfs2_mmap,
 642         .open           = gfs2_open,
 643         .release        = gfs2_close,
 644         .fsync          = gfs2_fsync,
 645         .lock           = gfs2_lock,
 646         .sendfile       = generic_file_sendfile,
 647         .flock          = gfs2_flock,
 648         .splice_read    = generic_file_splice_read,
 649         .splice_write   = generic_file_splice_write,
 650 };
 651
 652 const struct file_operations gfs2_dir_fops = {
 653         .readdir        = gfs2_readdir,
 654         .unlocked_ioctl = gfs2_ioctl,
 655         .open           = gfs2_open,
 656         .release        = gfs2_close,
 657         .fsync          = gfs2_fsync,
 658         .lock           = gfs2_lock,
 659         .flock          = gfs2_flock,
 660 };
 661