1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 5 */ 6 7 #include <linux/slab.h> 8 #include <linux/spinlock.h> 9 #include <linux/compat.h> 10 #include <linux/completion.h> 11 #include <linux/buffer_head.h> 12 #include <linux/pagemap.h> 13 #include <linux/uio.h> 14 #include <linux/blkdev.h> 15 #include <linux/mm.h> 16 #include <linux/mount.h> 17 #include <linux/fs.h> 18 #include <linux/gfs2_ondisk.h> 19 #include <linux/falloc.h> 20 #include <linux/swap.h> 21 #include <linux/crc32.h> 22 #include <linux/writeback.h> 23 #include <linux/uaccess.h> 24 #include <linux/dlm.h> 25 #include <linux/dlm_plock.h> 26 #include <linux/delay.h> 27 #include <linux/backing-dev.h> 28 29 #include "gfs2.h" 30 #include "incore.h" 31 #include "bmap.h" 32 #include "aops.h" 33 #include "dir.h" 34 #include "glock.h" 35 #include "glops.h" 36 #include "inode.h" 37 #include "log.h" 38 #include "meta_io.h" 39 #include "quota.h" 40 #include "rgrp.h" 41 #include "trans.h" 42 #include "util.h" 43 44 /** 45 * gfs2_llseek - seek to a location in a file 46 * @file: the file 47 * @offset: the offset 48 * @whence: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END) 49 * 50 * SEEK_END requires the glock for the file because it references the 51 * file's size. 52 * 53 * Returns: The new offset, or errno 54 */ 55 56 static loff_t gfs2_llseek(struct file *file, loff_t offset, int whence) 57 { 58 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); 59 struct gfs2_holder i_gh; 60 loff_t error; 61 62 switch (whence) { 63 case SEEK_END: 64 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, 65 &i_gh); 66 if (!error) { 67 error = generic_file_llseek(file, offset, whence); 68 gfs2_glock_dq_uninit(&i_gh); 69 } 70 break; 71 72 case SEEK_DATA: 73 error = gfs2_seek_data(file, offset); 74 break; 75 76 case SEEK_HOLE: 77 error = gfs2_seek_hole(file, offset); 78 break; 79 80 case SEEK_CUR: 81 case SEEK_SET: 82 /* 83 * These don't reference inode->i_size and don't depend on the 84 * block mapping, so we don't need the glock. 85 */ 86 error = generic_file_llseek(file, offset, whence); 87 break; 88 default: 89 error = -EINVAL; 90 } 91 92 return error; 93 } 94 95 /** 96 * gfs2_readdir - Iterator for a directory 97 * @file: The directory to read from 98 * @ctx: What to feed directory entries to 99 * 100 * Returns: errno 101 */ 102 103 static int gfs2_readdir(struct file *file, struct dir_context *ctx) 104 { 105 struct inode *dir = file->f_mapping->host; 106 struct gfs2_inode *dip = GFS2_I(dir); 107 struct gfs2_holder d_gh; 108 int error; 109 110 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 111 if (error) 112 return error; 113 114 error = gfs2_dir_read(dir, ctx, &file->f_ra); 115 116 gfs2_glock_dq_uninit(&d_gh); 117 118 return error; 119 } 120 121 /** 122 * fsflag_gfs2flag 123 * 124 * The FS_JOURNAL_DATA_FL flag maps to GFS2_DIF_INHERIT_JDATA for directories, 125 * and to GFS2_DIF_JDATA for non-directories. 126 */ 127 static struct { 128 u32 fsflag; 129 u32 gfsflag; 130 } fsflag_gfs2flag[] = { 131 {FS_SYNC_FL, GFS2_DIF_SYNC}, 132 {FS_IMMUTABLE_FL, GFS2_DIF_IMMUTABLE}, 133 {FS_APPEND_FL, GFS2_DIF_APPENDONLY}, 134 {FS_NOATIME_FL, GFS2_DIF_NOATIME}, 135 {FS_INDEX_FL, GFS2_DIF_EXHASH}, 136 {FS_TOPDIR_FL, GFS2_DIF_TOPDIR}, 137 {FS_JOURNAL_DATA_FL, GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA}, 138 }; 139 140 static inline u32 gfs2_gfsflags_to_fsflags(struct inode *inode, u32 gfsflags) 141 { 142 int i; 143 u32 fsflags = 0; 144 145 if (S_ISDIR(inode->i_mode)) 146 gfsflags &= ~GFS2_DIF_JDATA; 147 else 148 gfsflags &= ~GFS2_DIF_INHERIT_JDATA; 149 150 for (i = 0; i < ARRAY_SIZE(fsflag_gfs2flag); i++) 151 if (gfsflags & fsflag_gfs2flag[i].gfsflag) 152 fsflags |= fsflag_gfs2flag[i].fsflag; 153 return fsflags; 154 } 155 156 static int gfs2_get_flags(struct file *filp, u32 __user *ptr) 157 { 158 struct inode *inode = file_inode(filp); 159 struct gfs2_inode *ip = GFS2_I(inode); 160 struct gfs2_holder gh; 161 int error; 162 u32 fsflags; 163 164 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 165 error = gfs2_glock_nq(&gh); 166 if (error) 167 goto out_uninit; 168 169 fsflags = gfs2_gfsflags_to_fsflags(inode, ip->i_diskflags); 170 171 if (put_user(fsflags, ptr)) 172 error = -EFAULT; 173 174 gfs2_glock_dq(&gh); 175 out_uninit: 176 gfs2_holder_uninit(&gh); 177 return error; 178 } 179 180 void gfs2_set_inode_flags(struct inode *inode) 181 { 182 struct gfs2_inode *ip = GFS2_I(inode); 183 unsigned int flags = inode->i_flags; 184 185 flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_NOSEC); 186 if ((ip->i_eattr == 0) && !is_sxid(inode->i_mode)) 187 flags |= S_NOSEC; 188 if (ip->i_diskflags & GFS2_DIF_IMMUTABLE) 189 flags |= S_IMMUTABLE; 190 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) 191 flags |= S_APPEND; 192 if (ip->i_diskflags & GFS2_DIF_NOATIME) 193 flags |= S_NOATIME; 194 if (ip->i_diskflags & GFS2_DIF_SYNC) 195 flags |= S_SYNC; 196 inode->i_flags = flags; 197 } 198 199 /* Flags that can be set by user space */ 200 #define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \ 201 GFS2_DIF_IMMUTABLE| \ 202 GFS2_DIF_APPENDONLY| \ 203 GFS2_DIF_NOATIME| \ 204 GFS2_DIF_SYNC| \ 205 GFS2_DIF_TOPDIR| \ 206 GFS2_DIF_INHERIT_JDATA) 207 208 /** 209 * do_gfs2_set_flags - set flags on an inode 210 * @filp: file pointer 211 * @reqflags: The flags to set 212 * @mask: Indicates which flags are valid 213 * @fsflags: The FS_* inode flags passed in 214 * 215 */ 216 static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask, 217 const u32 fsflags) 218 { 219 struct inode *inode = file_inode(filp); 220 struct gfs2_inode *ip = GFS2_I(inode); 221 struct gfs2_sbd *sdp = GFS2_SB(inode); 222 struct buffer_head *bh; 223 struct gfs2_holder gh; 224 int error; 225 u32 new_flags, flags, oldflags; 226 227 error = mnt_want_write_file(filp); 228 if (error) 229 return error; 230 231 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 232 if (error) 233 goto out_drop_write; 234 235 oldflags = gfs2_gfsflags_to_fsflags(inode, ip->i_diskflags); 236 error = vfs_ioc_setflags_prepare(inode, oldflags, fsflags); 237 if (error) 238 goto out; 239 240 error = -EACCES; 241 if (!inode_owner_or_capable(inode)) 242 goto out; 243 244 error = 0; 245 flags = ip->i_diskflags; 246 new_flags = (flags & ~mask) | (reqflags & mask); 247 if ((new_flags ^ flags) == 0) 248 goto out; 249 250 error = -EPERM; 251 if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE)) 252 goto out; 253 if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY)) 254 goto out; 255 if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) && 256 !capable(CAP_LINUX_IMMUTABLE)) 257 goto out; 258 if (!IS_IMMUTABLE(inode)) { 259 error = gfs2_permission(inode, MAY_WRITE); 260 if (error) 261 goto out; 262 } 263 if ((flags ^ new_flags) & GFS2_DIF_JDATA) { 264 if (new_flags & GFS2_DIF_JDATA) 265 gfs2_log_flush(sdp, ip->i_gl, 266 GFS2_LOG_HEAD_FLUSH_NORMAL | 267 GFS2_LFC_SET_FLAGS); 268 error = filemap_fdatawrite(inode->i_mapping); 269 if (error) 270 goto out; 271 error = filemap_fdatawait(inode->i_mapping); 272 if (error) 273 goto out; 274 if (new_flags & GFS2_DIF_JDATA) 275 gfs2_ordered_del_inode(ip); 276 } 277 error = gfs2_trans_begin(sdp, RES_DINODE, 0); 278 if (error) 279 goto out; 280 error = gfs2_meta_inode_buffer(ip, &bh); 281 if (error) 282 goto out_trans_end; 283 inode->i_ctime = current_time(inode); 284 gfs2_trans_add_meta(ip->i_gl, bh); 285 ip->i_diskflags = new_flags; 286 gfs2_dinode_out(ip, bh->b_data); 287 brelse(bh); 288 gfs2_set_inode_flags(inode); 289 gfs2_set_aops(inode); 290 out_trans_end: 291 gfs2_trans_end(sdp); 292 out: 293 gfs2_glock_dq_uninit(&gh); 294 out_drop_write: 295 mnt_drop_write_file(filp); 296 return error; 297 } 298 299 static int gfs2_set_flags(struct file *filp, u32 __user *ptr) 300 { 301 struct inode *inode = file_inode(filp); 302 u32 fsflags, gfsflags = 0; 303 u32 mask; 304 int i; 305 306 if (get_user(fsflags, ptr)) 307 return -EFAULT; 308 309 for (i = 0; i < ARRAY_SIZE(fsflag_gfs2flag); i++) { 310 if (fsflags & fsflag_gfs2flag[i].fsflag) { 311 fsflags &= ~fsflag_gfs2flag[i].fsflag; 312 gfsflags |= fsflag_gfs2flag[i].gfsflag; 313 } 314 } 315 if (fsflags || gfsflags & ~GFS2_FLAGS_USER_SET) 316 return -EINVAL; 317 318 mask = GFS2_FLAGS_USER_SET; 319 if (S_ISDIR(inode->i_mode)) { 320 mask &= ~GFS2_DIF_JDATA; 321 } else { 322 /* The GFS2_DIF_TOPDIR flag is only valid for directories. */ 323 if (gfsflags & GFS2_DIF_TOPDIR) 324 return -EINVAL; 325 mask &= ~(GFS2_DIF_TOPDIR | GFS2_DIF_INHERIT_JDATA); 326 } 327 328 return do_gfs2_set_flags(filp, gfsflags, mask, fsflags); 329 } 330 331 static int gfs2_getlabel(struct file *filp, char __user *label) 332 { 333 struct inode *inode = file_inode(filp); 334 struct gfs2_sbd *sdp = GFS2_SB(inode); 335 336 if (copy_to_user(label, sdp->sd_sb.sb_locktable, GFS2_LOCKNAME_LEN)) 337 return -EFAULT; 338 339 return 0; 340 } 341 342 static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 343 { 344 switch(cmd) { 345 case FS_IOC_GETFLAGS: 346 return gfs2_get_flags(filp, (u32 __user *)arg); 347 case FS_IOC_SETFLAGS: 348 return gfs2_set_flags(filp, (u32 __user *)arg); 349 case FITRIM: 350 return gfs2_fitrim(filp, (void __user *)arg); 351 case FS_IOC_GETFSLABEL: 352 return gfs2_getlabel(filp, (char __user *)arg); 353 } 354 355 return -ENOTTY; 356 } 357 358 #ifdef CONFIG_COMPAT 359 static long gfs2_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 360 { 361 switch(cmd) { 362 /* These are just misnamed, they actually get/put from/to user an int */ 363 case FS_IOC32_GETFLAGS: 364 cmd = FS_IOC_GETFLAGS; 365 break; 366 case FS_IOC32_SETFLAGS: 367 cmd = FS_IOC_SETFLAGS; 368 break; 369 /* Keep this list in sync with gfs2_ioctl */ 370 case FITRIM: 371 case FS_IOC_GETFSLABEL: 372 break; 373 default: 374 return -ENOIOCTLCMD; 375 } 376 377 return gfs2_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 378 } 379 #else 380 #define gfs2_compat_ioctl NULL 381 #endif 382 383 /** 384 * gfs2_size_hint - Give a hint to the size of a write request 385 * @filep: The struct file 386 * @offset: The file offset of the write 387 * @size: The length of the write 388 * 389 * When we are about to do a write, this function records the total 390 * write size in order to provide a suitable hint to the lower layers 391 * about how many blocks will be required. 392 * 393 */ 394 395 static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size) 396 { 397 struct inode *inode = file_inode(filep); 398 struct gfs2_sbd *sdp = GFS2_SB(inode); 399 struct gfs2_inode *ip = GFS2_I(inode); 400 size_t blks = (size + sdp->sd_sb.sb_bsize - 1) >> sdp->sd_sb.sb_bsize_shift; 401 int hint = min_t(size_t, INT_MAX, blks); 402 403 if (hint > atomic_read(&ip->i_sizehint)) 404 atomic_set(&ip->i_sizehint, hint); 405 } 406 407 /** 408 * gfs2_allocate_page_backing - Allocate blocks for a write fault 409 * @page: The (locked) page to allocate backing for 410 * @length: Size of the allocation 411 * 412 * We try to allocate all the blocks required for the page in one go. This 413 * might fail for various reasons, so we keep trying until all the blocks to 414 * back this page are allocated. If some of the blocks are already allocated, 415 * that is ok too. 416 */ 417 static int gfs2_allocate_page_backing(struct page *page, unsigned int length) 418 { 419 u64 pos = page_offset(page); 420 421 do { 422 struct iomap iomap = { }; 423 424 if (gfs2_iomap_get_alloc(page->mapping->host, pos, length, &iomap)) 425 return -EIO; 426 427 if (length < iomap.length) 428 iomap.length = length; 429 length -= iomap.length; 430 pos += iomap.length; 431 } while (length > 0); 432 433 return 0; 434 } 435 436 /** 437 * gfs2_page_mkwrite - Make a shared, mmap()ed, page writable 438 * @vma: The virtual memory area 439 * @vmf: The virtual memory fault containing the page to become writable 440 * 441 * When the page becomes writable, we need to ensure that we have 442 * blocks allocated on disk to back that page. 443 */ 444 445 static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf) 446 { 447 struct page *page = vmf->page; 448 struct inode *inode = file_inode(vmf->vma->vm_file); 449 struct gfs2_inode *ip = GFS2_I(inode); 450 struct gfs2_sbd *sdp = GFS2_SB(inode); 451 struct gfs2_alloc_parms ap = { .aflags = 0, }; 452 u64 offset = page_offset(page); 453 unsigned int data_blocks, ind_blocks, rblocks; 454 struct gfs2_holder gh; 455 unsigned int length; 456 loff_t size; 457 int ret; 458 459 sb_start_pagefault(inode->i_sb); 460 461 ret = gfs2_rsqa_alloc(ip); 462 if (ret) 463 goto out; 464 465 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 466 ret = gfs2_glock_nq(&gh); 467 if (ret) 468 goto out_uninit; 469 470 /* Check page index against inode size */ 471 size = i_size_read(inode); 472 if (offset >= size) { 473 ret = -EINVAL; 474 goto out_unlock; 475 } 476 477 /* Update file times before taking page lock */ 478 file_update_time(vmf->vma->vm_file); 479 480 /* page is wholly or partially inside EOF */ 481 if (offset > size - PAGE_SIZE) 482 length = offset_in_page(size); 483 else 484 length = PAGE_SIZE; 485 486 gfs2_size_hint(vmf->vma->vm_file, offset, length); 487 488 set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); 489 set_bit(GIF_SW_PAGED, &ip->i_flags); 490 491 /* 492 * iomap_writepage / iomap_writepages currently don't support inline 493 * files, so always unstuff here. 494 */ 495 496 if (!gfs2_is_stuffed(ip) && 497 !gfs2_write_alloc_required(ip, offset, length)) { 498 lock_page(page); 499 if (!PageUptodate(page) || page->mapping != inode->i_mapping) { 500 ret = -EAGAIN; 501 unlock_page(page); 502 } 503 goto out_unlock; 504 } 505 506 ret = gfs2_rindex_update(sdp); 507 if (ret) 508 goto out_unlock; 509 510 gfs2_write_calc_reserv(ip, length, &data_blocks, &ind_blocks); 511 ap.target = data_blocks + ind_blocks; 512 ret = gfs2_quota_lock_check(ip, &ap); 513 if (ret) 514 goto out_unlock; 515 ret = gfs2_inplace_reserve(ip, &ap); 516 if (ret) 517 goto out_quota_unlock; 518 519 rblocks = RES_DINODE + ind_blocks; 520 if (gfs2_is_jdata(ip)) 521 rblocks += data_blocks ? data_blocks : 1; 522 if (ind_blocks || data_blocks) { 523 rblocks += RES_STATFS + RES_QUOTA; 524 rblocks += gfs2_rg_blocks(ip, data_blocks + ind_blocks); 525 } 526 ret = gfs2_trans_begin(sdp, rblocks, 0); 527 if (ret) 528 goto out_trans_fail; 529 530 lock_page(page); 531 ret = -EAGAIN; 532 /* If truncated, we must retry the operation, we may have raced 533 * with the glock demotion code. 534 */ 535 if (!PageUptodate(page) || page->mapping != inode->i_mapping) 536 goto out_trans_end; 537 538 /* Unstuff, if required, and allocate backing blocks for page */ 539 ret = 0; 540 if (gfs2_is_stuffed(ip)) 541 ret = gfs2_unstuff_dinode(ip, page); 542 if (ret == 0) 543 ret = gfs2_allocate_page_backing(page, length); 544 545 out_trans_end: 546 if (ret) 547 unlock_page(page); 548 gfs2_trans_end(sdp); 549 out_trans_fail: 550 gfs2_inplace_release(ip); 551 out_quota_unlock: 552 gfs2_quota_unlock(ip); 553 out_unlock: 554 gfs2_glock_dq(&gh); 555 out_uninit: 556 gfs2_holder_uninit(&gh); 557 if (ret == 0) { 558 set_page_dirty(page); 559 wait_for_stable_page(page); 560 } 561 out: 562 sb_end_pagefault(inode->i_sb); 563 return block_page_mkwrite_return(ret); 564 } 565 566 static const struct vm_operations_struct gfs2_vm_ops = { 567 .fault = filemap_fault, 568 .map_pages = filemap_map_pages, 569 .page_mkwrite = gfs2_page_mkwrite, 570 }; 571 572 /** 573 * gfs2_mmap - 574 * @file: The file to map 575 * @vma: The VMA which described the mapping 576 * 577 * There is no need to get a lock here unless we should be updating 578 * atime. We ignore any locking errors since the only consequence is 579 * a missed atime update (which will just be deferred until later). 580 * 581 * Returns: 0 582 */ 583 584 static int gfs2_mmap(struct file *file, struct vm_area_struct *vma) 585 { 586 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); 587 588 if (!(file->f_flags & O_NOATIME) && 589 !IS_NOATIME(&ip->i_inode)) { 590 struct gfs2_holder i_gh; 591 int error; 592 593 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, 594 &i_gh); 595 if (error) 596 return error; 597 /* grab lock to update inode */ 598 gfs2_glock_dq_uninit(&i_gh); 599 file_accessed(file); 600 } 601 vma->vm_ops = &gfs2_vm_ops; 602 603 return 0; 604 } 605 606 /** 607 * gfs2_open_common - This is common to open and atomic_open 608 * @inode: The inode being opened 609 * @file: The file being opened 610 * 611 * This maybe called under a glock or not depending upon how it has 612 * been called. We must always be called under a glock for regular 613 * files, however. For other file types, it does not matter whether 614 * we hold the glock or not. 615 * 616 * Returns: Error code or 0 for success 617 */ 618 619 int gfs2_open_common(struct inode *inode, struct file *file) 620 { 621 struct gfs2_file *fp; 622 int ret; 623 624 if (S_ISREG(inode->i_mode)) { 625 ret = generic_file_open(inode, file); 626 if (ret) 627 return ret; 628 } 629 630 fp = kzalloc(sizeof(struct gfs2_file), GFP_NOFS); 631 if (!fp) 632 return -ENOMEM; 633 634 mutex_init(&fp->f_fl_mutex); 635 636 gfs2_assert_warn(GFS2_SB(inode), !file->private_data); 637 file->private_data = fp; 638 return 0; 639 } 640 641 /** 642 * gfs2_open - open a file 643 * @inode: the inode to open 644 * @file: the struct file for this opening 645 * 646 * After atomic_open, this function is only used for opening files 647 * which are already cached. We must still get the glock for regular 648 * files to ensure that we have the file size uptodate for the large 649 * file check which is in the common code. That is only an issue for 650 * regular files though. 651 * 652 * Returns: errno 653 */ 654 655 static int gfs2_open(struct inode *inode, struct file *file) 656 { 657 struct gfs2_inode *ip = GFS2_I(inode); 658 struct gfs2_holder i_gh; 659 int error; 660 bool need_unlock = false; 661 662 if (S_ISREG(ip->i_inode.i_mode)) { 663 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, 664 &i_gh); 665 if (error) 666 return error; 667 need_unlock = true; 668 } 669 670 error = gfs2_open_common(inode, file); 671 672 if (need_unlock) 673 gfs2_glock_dq_uninit(&i_gh); 674 675 return error; 676 } 677 678 /** 679 * gfs2_release - called to close a struct file 680 * @inode: the inode the struct file belongs to 681 * @file: the struct file being closed 682 * 683 * Returns: errno 684 */ 685 686 static int gfs2_release(struct inode *inode, struct file *file) 687 { 688 struct gfs2_inode *ip = GFS2_I(inode); 689 690 kfree(file->private_data); 691 file->private_data = NULL; 692 693 if (!(file->f_mode & FMODE_WRITE)) 694 return 0; 695 696 gfs2_rsqa_delete(ip, &inode->i_writecount); 697 return 0; 698 } 699 700 /** 701 * gfs2_fsync - sync the dirty data for a file (across the cluster) 702 * @file: the file that points to the dentry 703 * @start: the start position in the file to sync 704 * @end: the end position in the file to sync 705 * @datasync: set if we can ignore timestamp changes 706 * 707 * We split the data flushing here so that we don't wait for the data 708 * until after we've also sent the metadata to disk. Note that for 709 * data=ordered, we will write & wait for the data at the log flush 710 * stage anyway, so this is unlikely to make much of a difference 711 * except in the data=writeback case. 712 * 713 * If the fdatawrite fails due to any reason except -EIO, we will 714 * continue the remainder of the fsync, although we'll still report 715 * the error at the end. This is to match filemap_write_and_wait_range() 716 * behaviour. 717 * 718 * Returns: errno 719 */ 720 721 static int gfs2_fsync(struct file *file, loff_t start, loff_t end, 722 int datasync) 723 { 724 struct address_space *mapping = file->f_mapping; 725 struct inode *inode = mapping->host; 726 int sync_state = inode->i_state & I_DIRTY_ALL; 727 struct gfs2_inode *ip = GFS2_I(inode); 728 int ret = 0, ret1 = 0; 729 730 if (mapping->nrpages) { 731 ret1 = filemap_fdatawrite_range(mapping, start, end); 732 if (ret1 == -EIO) 733 return ret1; 734 } 735 736 if (!gfs2_is_jdata(ip)) 737 sync_state &= ~I_DIRTY_PAGES; 738 if (datasync) 739 sync_state &= ~(I_DIRTY_SYNC | I_DIRTY_TIME); 740 741 if (sync_state) { 742 ret = sync_inode_metadata(inode, 1); 743 if (ret) 744 return ret; 745 if (gfs2_is_jdata(ip)) 746 ret = file_write_and_wait(file); 747 if (ret) 748 return ret; 749 gfs2_ail_flush(ip->i_gl, 1); 750 } 751 752 if (mapping->nrpages) 753 ret = file_fdatawait_range(file, start, end); 754 755 return ret ? ret : ret1; 756 } 757 758 static ssize_t gfs2_file_direct_read(struct kiocb *iocb, struct iov_iter *to) 759 { 760 struct file *file = iocb->ki_filp; 761 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); 762 size_t count = iov_iter_count(to); 763 struct gfs2_holder gh; 764 ssize_t ret; 765 766 if (!count) 767 return 0; /* skip atime */ 768 769 gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, 0, &gh); 770 ret = gfs2_glock_nq(&gh); 771 if (ret) 772 goto out_uninit; 773 774 ret = iomap_dio_rw(iocb, to, &gfs2_iomap_ops, NULL, 775 is_sync_kiocb(iocb)); 776 777 gfs2_glock_dq(&gh); 778 out_uninit: 779 gfs2_holder_uninit(&gh); 780 return ret; 781 } 782 783 static ssize_t gfs2_file_direct_write(struct kiocb *iocb, struct iov_iter *from) 784 { 785 struct file *file = iocb->ki_filp; 786 struct inode *inode = file->f_mapping->host; 787 struct gfs2_inode *ip = GFS2_I(inode); 788 size_t len = iov_iter_count(from); 789 loff_t offset = iocb->ki_pos; 790 struct gfs2_holder gh; 791 ssize_t ret; 792 793 /* 794 * Deferred lock, even if its a write, since we do no allocation on 795 * this path. All we need to change is the atime, and this lock mode 796 * ensures that other nodes have flushed their buffered read caches 797 * (i.e. their page cache entries for this inode). We do not, 798 * unfortunately, have the option of only flushing a range like the 799 * VFS does. 800 */ 801 gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, 0, &gh); 802 ret = gfs2_glock_nq(&gh); 803 if (ret) 804 goto out_uninit; 805 806 /* Silently fall back to buffered I/O when writing beyond EOF */ 807 if (offset + len > i_size_read(&ip->i_inode)) 808 goto out; 809 810 ret = iomap_dio_rw(iocb, from, &gfs2_iomap_ops, NULL, 811 is_sync_kiocb(iocb)); 812 813 out: 814 gfs2_glock_dq(&gh); 815 out_uninit: 816 gfs2_holder_uninit(&gh); 817 return ret; 818 } 819 820 static ssize_t gfs2_file_read_iter(struct kiocb *iocb, struct iov_iter *to) 821 { 822 ssize_t ret; 823 824 if (iocb->ki_flags & IOCB_DIRECT) { 825 ret = gfs2_file_direct_read(iocb, to); 826 if (likely(ret != -ENOTBLK)) 827 return ret; 828 iocb->ki_flags &= ~IOCB_DIRECT; 829 } 830 return generic_file_read_iter(iocb, to); 831 } 832 833 /** 834 * gfs2_file_write_iter - Perform a write to a file 835 * @iocb: The io context 836 * @from: The data to write 837 * 838 * We have to do a lock/unlock here to refresh the inode size for 839 * O_APPEND writes, otherwise we can land up writing at the wrong 840 * offset. There is still a race, but provided the app is using its 841 * own file locking, this will make O_APPEND work as expected. 842 * 843 */ 844 845 static ssize_t gfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *from) 846 { 847 struct file *file = iocb->ki_filp; 848 struct inode *inode = file_inode(file); 849 struct gfs2_inode *ip = GFS2_I(inode); 850 ssize_t written = 0, ret; 851 852 ret = gfs2_rsqa_alloc(ip); 853 if (ret) 854 return ret; 855 856 gfs2_size_hint(file, iocb->ki_pos, iov_iter_count(from)); 857 858 if (iocb->ki_flags & IOCB_APPEND) { 859 struct gfs2_holder gh; 860 861 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 862 if (ret) 863 return ret; 864 gfs2_glock_dq_uninit(&gh); 865 } 866 867 inode_lock(inode); 868 ret = generic_write_checks(iocb, from); 869 if (ret <= 0) 870 goto out; 871 872 /* We can write back this queue in page reclaim */ 873 current->backing_dev_info = inode_to_bdi(inode); 874 875 ret = file_remove_privs(file); 876 if (ret) 877 goto out2; 878 879 ret = file_update_time(file); 880 if (ret) 881 goto out2; 882 883 if (iocb->ki_flags & IOCB_DIRECT) { 884 struct address_space *mapping = file->f_mapping; 885 loff_t pos, endbyte; 886 ssize_t buffered; 887 888 written = gfs2_file_direct_write(iocb, from); 889 if (written < 0 || !iov_iter_count(from)) 890 goto out2; 891 892 ret = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops); 893 if (unlikely(ret < 0)) 894 goto out2; 895 buffered = ret; 896 897 /* 898 * We need to ensure that the page cache pages are written to 899 * disk and invalidated to preserve the expected O_DIRECT 900 * semantics. 901 */ 902 pos = iocb->ki_pos; 903 endbyte = pos + buffered - 1; 904 ret = filemap_write_and_wait_range(mapping, pos, endbyte); 905 if (!ret) { 906 iocb->ki_pos += buffered; 907 written += buffered; 908 invalidate_mapping_pages(mapping, 909 pos >> PAGE_SHIFT, 910 endbyte >> PAGE_SHIFT); 911 } else { 912 /* 913 * We don't know how much we wrote, so just return 914 * the number of bytes which were direct-written 915 */ 916 } 917 } else { 918 ret = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops); 919 if (likely(ret > 0)) 920 iocb->ki_pos += ret; 921 } 922 923 out2: 924 current->backing_dev_info = NULL; 925 out: 926 inode_unlock(inode); 927 if (likely(ret > 0)) { 928 /* Handle various SYNC-type writes */ 929 ret = generic_write_sync(iocb, ret); 930 } 931 return written ? written : ret; 932 } 933 934 static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len, 935 int mode) 936 { 937 struct super_block *sb = inode->i_sb; 938 struct gfs2_inode *ip = GFS2_I(inode); 939 loff_t end = offset + len; 940 struct buffer_head *dibh; 941 int error; 942 943 error = gfs2_meta_inode_buffer(ip, &dibh); 944 if (unlikely(error)) 945 return error; 946 947 gfs2_trans_add_meta(ip->i_gl, dibh); 948 949 if (gfs2_is_stuffed(ip)) { 950 error = gfs2_unstuff_dinode(ip, NULL); 951 if (unlikely(error)) 952 goto out; 953 } 954 955 while (offset < end) { 956 struct iomap iomap = { }; 957 958 error = gfs2_iomap_get_alloc(inode, offset, end - offset, 959 &iomap); 960 if (error) 961 goto out; 962 offset = iomap.offset + iomap.length; 963 if (!(iomap.flags & IOMAP_F_NEW)) 964 continue; 965 error = sb_issue_zeroout(sb, iomap.addr >> inode->i_blkbits, 966 iomap.length >> inode->i_blkbits, 967 GFP_NOFS); 968 if (error) { 969 fs_err(GFS2_SB(inode), "Failed to zero data buffers\n"); 970 goto out; 971 } 972 } 973 out: 974 brelse(dibh); 975 return error; 976 } 977 978 /** 979 * calc_max_reserv() - Reverse of write_calc_reserv. Given a number of 980 * blocks, determine how many bytes can be written. 981 * @ip: The inode in question. 982 * @len: Max cap of bytes. What we return in *len must be <= this. 983 * @data_blocks: Compute and return the number of data blocks needed 984 * @ind_blocks: Compute and return the number of indirect blocks needed 985 * @max_blocks: The total blocks available to work with. 986 * 987 * Returns: void, but @len, @data_blocks and @ind_blocks are filled in. 988 */ 989 static void calc_max_reserv(struct gfs2_inode *ip, loff_t *len, 990 unsigned int *data_blocks, unsigned int *ind_blocks, 991 unsigned int max_blocks) 992 { 993 loff_t max = *len; 994 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 995 unsigned int tmp, max_data = max_blocks - 3 * (sdp->sd_max_height - 1); 996 997 for (tmp = max_data; tmp > sdp->sd_diptrs;) { 998 tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); 999 max_data -= tmp; 1000 } 1001 1002 *data_blocks = max_data; 1003 *ind_blocks = max_blocks - max_data; 1004 *len = ((loff_t)max_data - 3) << sdp->sd_sb.sb_bsize_shift; 1005 if (*len > max) { 1006 *len = max; 1007 gfs2_write_calc_reserv(ip, max, data_blocks, ind_blocks); 1008 } 1009 } 1010 1011 static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len) 1012 { 1013 struct inode *inode = file_inode(file); 1014 struct gfs2_sbd *sdp = GFS2_SB(inode); 1015 struct gfs2_inode *ip = GFS2_I(inode); 1016 struct gfs2_alloc_parms ap = { .aflags = 0, }; 1017 unsigned int data_blocks = 0, ind_blocks = 0, rblocks; 1018 loff_t bytes, max_bytes, max_blks; 1019 int error; 1020 const loff_t pos = offset; 1021 const loff_t count = len; 1022 loff_t bsize_mask = ~((loff_t)sdp->sd_sb.sb_bsize - 1); 1023 loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift; 1024 loff_t max_chunk_size = UINT_MAX & bsize_mask; 1025 1026 next = (next + 1) << sdp->sd_sb.sb_bsize_shift; 1027 1028 offset &= bsize_mask; 1029 1030 len = next - offset; 1031 bytes = sdp->sd_max_rg_data * sdp->sd_sb.sb_bsize / 2; 1032 if (!bytes) 1033 bytes = UINT_MAX; 1034 bytes &= bsize_mask; 1035 if (bytes == 0) 1036 bytes = sdp->sd_sb.sb_bsize; 1037 1038 gfs2_size_hint(file, offset, len); 1039 1040 gfs2_write_calc_reserv(ip, PAGE_SIZE, &data_blocks, &ind_blocks); 1041 ap.min_target = data_blocks + ind_blocks; 1042 1043 while (len > 0) { 1044 if (len < bytes) 1045 bytes = len; 1046 if (!gfs2_write_alloc_required(ip, offset, bytes)) { 1047 len -= bytes; 1048 offset += bytes; 1049 continue; 1050 } 1051 1052 /* We need to determine how many bytes we can actually 1053 * fallocate without exceeding quota or going over the 1054 * end of the fs. We start off optimistically by assuming 1055 * we can write max_bytes */ 1056 max_bytes = (len > max_chunk_size) ? max_chunk_size : len; 1057 1058 /* Since max_bytes is most likely a theoretical max, we 1059 * calculate a more realistic 'bytes' to serve as a good 1060 * starting point for the number of bytes we may be able 1061 * to write */ 1062 gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks); 1063 ap.target = data_blocks + ind_blocks; 1064 1065 error = gfs2_quota_lock_check(ip, &ap); 1066 if (error) 1067 return error; 1068 /* ap.allowed tells us how many blocks quota will allow 1069 * us to write. Check if this reduces max_blks */ 1070 max_blks = UINT_MAX; 1071 if (ap.allowed) 1072 max_blks = ap.allowed; 1073 1074 error = gfs2_inplace_reserve(ip, &ap); 1075 if (error) 1076 goto out_qunlock; 1077 1078 /* check if the selected rgrp limits our max_blks further */ 1079 if (ap.allowed && ap.allowed < max_blks) 1080 max_blks = ap.allowed; 1081 1082 /* Almost done. Calculate bytes that can be written using 1083 * max_blks. We also recompute max_bytes, data_blocks and 1084 * ind_blocks */ 1085 calc_max_reserv(ip, &max_bytes, &data_blocks, 1086 &ind_blocks, max_blks); 1087 1088 rblocks = RES_DINODE + ind_blocks + RES_STATFS + RES_QUOTA + 1089 RES_RG_HDR + gfs2_rg_blocks(ip, data_blocks + ind_blocks); 1090 if (gfs2_is_jdata(ip)) 1091 rblocks += data_blocks ? data_blocks : 1; 1092 1093 error = gfs2_trans_begin(sdp, rblocks, 1094 PAGE_SIZE >> inode->i_blkbits); 1095 if (error) 1096 goto out_trans_fail; 1097 1098 error = fallocate_chunk(inode, offset, max_bytes, mode); 1099 gfs2_trans_end(sdp); 1100 1101 if (error) 1102 goto out_trans_fail; 1103 1104 len -= max_bytes; 1105 offset += max_bytes; 1106 gfs2_inplace_release(ip); 1107 gfs2_quota_unlock(ip); 1108 } 1109 1110 if (!(mode & FALLOC_FL_KEEP_SIZE) && (pos + count) > inode->i_size) 1111 i_size_write(inode, pos + count); 1112 file_update_time(file); 1113 mark_inode_dirty(inode); 1114 1115 if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host)) 1116 return vfs_fsync_range(file, pos, pos + count - 1, 1117 (file->f_flags & __O_SYNC) ? 0 : 1); 1118 return 0; 1119 1120 out_trans_fail: 1121 gfs2_inplace_release(ip); 1122 out_qunlock: 1123 gfs2_quota_unlock(ip); 1124 return error; 1125 } 1126 1127 static long gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len) 1128 { 1129 struct inode *inode = file_inode(file); 1130 struct gfs2_sbd *sdp = GFS2_SB(inode); 1131 struct gfs2_inode *ip = GFS2_I(inode); 1132 struct gfs2_holder gh; 1133 int ret; 1134 1135 if (mode & ~(FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE)) 1136 return -EOPNOTSUPP; 1137 /* fallocate is needed by gfs2_grow to reserve space in the rindex */ 1138 if (gfs2_is_jdata(ip) && inode != sdp->sd_rindex) 1139 return -EOPNOTSUPP; 1140 1141 inode_lock(inode); 1142 1143 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 1144 ret = gfs2_glock_nq(&gh); 1145 if (ret) 1146 goto out_uninit; 1147 1148 if (!(mode & FALLOC_FL_KEEP_SIZE) && 1149 (offset + len) > inode->i_size) { 1150 ret = inode_newsize_ok(inode, offset + len); 1151 if (ret) 1152 goto out_unlock; 1153 } 1154 1155 ret = get_write_access(inode); 1156 if (ret) 1157 goto out_unlock; 1158 1159 if (mode & FALLOC_FL_PUNCH_HOLE) { 1160 ret = __gfs2_punch_hole(file, offset, len); 1161 } else { 1162 ret = gfs2_rsqa_alloc(ip); 1163 if (ret) 1164 goto out_putw; 1165 1166 ret = __gfs2_fallocate(file, mode, offset, len); 1167 1168 if (ret) 1169 gfs2_rs_deltree(&ip->i_res); 1170 } 1171 1172 out_putw: 1173 put_write_access(inode); 1174 out_unlock: 1175 gfs2_glock_dq(&gh); 1176 out_uninit: 1177 gfs2_holder_uninit(&gh); 1178 inode_unlock(inode); 1179 return ret; 1180 } 1181 1182 static ssize_t gfs2_file_splice_write(struct pipe_inode_info *pipe, 1183 struct file *out, loff_t *ppos, 1184 size_t len, unsigned int flags) 1185 { 1186 int error; 1187 struct gfs2_inode *ip = GFS2_I(out->f_mapping->host); 1188 1189 error = gfs2_rsqa_alloc(ip); 1190 if (error) 1191 return (ssize_t)error; 1192 1193 gfs2_size_hint(out, *ppos, len); 1194 1195 return iter_file_splice_write(pipe, out, ppos, len, flags); 1196 } 1197 1198 #ifdef CONFIG_GFS2_FS_LOCKING_DLM 1199 1200 /** 1201 * gfs2_lock - acquire/release a posix lock on a file 1202 * @file: the file pointer 1203 * @cmd: either modify or retrieve lock state, possibly wait 1204 * @fl: type and range of lock 1205 * 1206 * Returns: errno 1207 */ 1208 1209 static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl) 1210 { 1211 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); 1212 struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); 1213 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 1214 1215 if (!(fl->fl_flags & FL_POSIX)) 1216 return -ENOLCK; 1217 if (__mandatory_lock(&ip->i_inode) && fl->fl_type != F_UNLCK) 1218 return -ENOLCK; 1219 1220 if (cmd == F_CANCELLK) { 1221 /* Hack: */ 1222 cmd = F_SETLK; 1223 fl->fl_type = F_UNLCK; 1224 } 1225 if (unlikely(gfs2_withdrawn(sdp))) { 1226 if (fl->fl_type == F_UNLCK) 1227 locks_lock_file_wait(file, fl); 1228 return -EIO; 1229 } 1230 if (IS_GETLK(cmd)) 1231 return dlm_posix_get(ls->ls_dlm, ip->i_no_addr, file, fl); 1232 else if (fl->fl_type == F_UNLCK) 1233 return dlm_posix_unlock(ls->ls_dlm, ip->i_no_addr, file, fl); 1234 else 1235 return dlm_posix_lock(ls->ls_dlm, ip->i_no_addr, file, cmd, fl); 1236 } 1237 1238 static int do_flock(struct file *file, int cmd, struct file_lock *fl) 1239 { 1240 struct gfs2_file *fp = file->private_data; 1241 struct gfs2_holder *fl_gh = &fp->f_fl_gh; 1242 struct gfs2_inode *ip = GFS2_I(file_inode(file)); 1243 struct gfs2_glock *gl; 1244 unsigned int state; 1245 u16 flags; 1246 int error = 0; 1247 int sleeptime; 1248 1249 state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED; 1250 flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY_1CB) | GL_EXACT; 1251 1252 mutex_lock(&fp->f_fl_mutex); 1253 1254 if (gfs2_holder_initialized(fl_gh)) { 1255 struct file_lock request; 1256 if (fl_gh->gh_state == state) 1257 goto out; 1258 locks_init_lock(&request); 1259 request.fl_type = F_UNLCK; 1260 request.fl_flags = FL_FLOCK; 1261 locks_lock_file_wait(file, &request); 1262 gfs2_glock_dq(fl_gh); 1263 gfs2_holder_reinit(state, flags, fl_gh); 1264 } else { 1265 error = gfs2_glock_get(GFS2_SB(&ip->i_inode), ip->i_no_addr, 1266 &gfs2_flock_glops, CREATE, &gl); 1267 if (error) 1268 goto out; 1269 gfs2_holder_init(gl, state, flags, fl_gh); 1270 gfs2_glock_put(gl); 1271 } 1272 for (sleeptime = 1; sleeptime <= 4; sleeptime <<= 1) { 1273 error = gfs2_glock_nq(fl_gh); 1274 if (error != GLR_TRYFAILED) 1275 break; 1276 fl_gh->gh_flags = LM_FLAG_TRY | GL_EXACT; 1277 fl_gh->gh_error = 0; 1278 msleep(sleeptime); 1279 } 1280 if (error) { 1281 gfs2_holder_uninit(fl_gh); 1282 if (error == GLR_TRYFAILED) 1283 error = -EAGAIN; 1284 } else { 1285 error = locks_lock_file_wait(file, fl); 1286 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); 1287 } 1288 1289 out: 1290 mutex_unlock(&fp->f_fl_mutex); 1291 return error; 1292 } 1293 1294 static void do_unflock(struct file *file, struct file_lock *fl) 1295 { 1296 struct gfs2_file *fp = file->private_data; 1297 struct gfs2_holder *fl_gh = &fp->f_fl_gh; 1298 1299 mutex_lock(&fp->f_fl_mutex); 1300 locks_lock_file_wait(file, fl); 1301 if (gfs2_holder_initialized(fl_gh)) { 1302 gfs2_glock_dq(fl_gh); 1303 gfs2_holder_uninit(fl_gh); 1304 } 1305 mutex_unlock(&fp->f_fl_mutex); 1306 } 1307 1308 /** 1309 * gfs2_flock - acquire/release a flock lock on a file 1310 * @file: the file pointer 1311 * @cmd: either modify or retrieve lock state, possibly wait 1312 * @fl: type and range of lock 1313 * 1314 * Returns: errno 1315 */ 1316 1317 static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl) 1318 { 1319 if (!(fl->fl_flags & FL_FLOCK)) 1320 return -ENOLCK; 1321 if (fl->fl_type & LOCK_MAND) 1322 return -EOPNOTSUPP; 1323 1324 if (fl->fl_type == F_UNLCK) { 1325 do_unflock(file, fl); 1326 return 0; 1327 } else { 1328 return do_flock(file, cmd, fl); 1329 } 1330 } 1331 1332 const struct file_operations gfs2_file_fops = { 1333 .llseek = gfs2_llseek, 1334 .read_iter = gfs2_file_read_iter, 1335 .write_iter = gfs2_file_write_iter, 1336 .iopoll = iomap_dio_iopoll, 1337 .unlocked_ioctl = gfs2_ioctl, 1338 .compat_ioctl = gfs2_compat_ioctl, 1339 .mmap = gfs2_mmap, 1340 .open = gfs2_open, 1341 .release = gfs2_release, 1342 .fsync = gfs2_fsync, 1343 .lock = gfs2_lock, 1344 .flock = gfs2_flock, 1345 .splice_read = generic_file_splice_read, 1346 .splice_write = gfs2_file_splice_write, 1347 .setlease = simple_nosetlease, 1348 .fallocate = gfs2_fallocate, 1349 }; 1350 1351 const struct file_operations gfs2_dir_fops = { 1352 .iterate_shared = gfs2_readdir, 1353 .unlocked_ioctl = gfs2_ioctl, 1354 .compat_ioctl = gfs2_compat_ioctl, 1355 .open = gfs2_open, 1356 .release = gfs2_release, 1357 .fsync = gfs2_fsync, 1358 .lock = gfs2_lock, 1359 .flock = gfs2_flock, 1360 .llseek = default_llseek, 1361 }; 1362 1363 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */ 1364 1365 const struct file_operations gfs2_file_fops_nolock = { 1366 .llseek = gfs2_llseek, 1367 .read_iter = gfs2_file_read_iter, 1368 .write_iter = gfs2_file_write_iter, 1369 .iopoll = iomap_dio_iopoll, 1370 .unlocked_ioctl = gfs2_ioctl, 1371 .compat_ioctl = gfs2_compat_ioctl, 1372 .mmap = gfs2_mmap, 1373 .open = gfs2_open, 1374 .release = gfs2_release, 1375 .fsync = gfs2_fsync, 1376 .splice_read = generic_file_splice_read, 1377 .splice_write = gfs2_file_splice_write, 1378 .setlease = generic_setlease, 1379 .fallocate = gfs2_fallocate, 1380 }; 1381 1382 const struct file_operations gfs2_dir_fops_nolock = { 1383 .iterate_shared = gfs2_readdir, 1384 .unlocked_ioctl = gfs2_ioctl, 1385 .compat_ioctl = gfs2_compat_ioctl, 1386 .open = gfs2_open, 1387 .release = gfs2_release, 1388 .fsync = gfs2_fsync, 1389 .llseek = default_llseek, 1390 }; 1391 1392