| 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/filelock.h> |
| 19 | #include <linux/gfs2_ondisk.h> |
| 20 | #include <linux/falloc.h> |
| 21 | #include <linux/swap.h> |
| 22 | #include <linux/crc32.h> |
| 23 | #include <linux/writeback.h> |
| 24 | #include <linux/uaccess.h> |
| 25 | #include <linux/dlm.h> |
| 26 | #include <linux/dlm_plock.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/backing-dev.h> |
| 29 | #include <linux/fileattr.h> |
| 30 | |
| 31 | #include "gfs2.h" |
| 32 | #include "incore.h" |
| 33 | #include "bmap.h" |
| 34 | #include "aops.h" |
| 35 | #include "dir.h" |
| 36 | #include "glock.h" |
| 37 | #include "glops.h" |
| 38 | #include "inode.h" |
| 39 | #include "log.h" |
| 40 | #include "meta_io.h" |
| 41 | #include "quota.h" |
| 42 | #include "rgrp.h" |
| 43 | #include "trans.h" |
| 44 | #include "util.h" |
| 45 | |
| 46 | /** |
| 47 | * gfs2_llseek - seek to a location in a file |
| 48 | * @file: the file |
| 49 | * @offset: the offset |
| 50 | * @whence: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END) |
| 51 | * |
| 52 | * SEEK_END requires the glock for the file because it references the |
| 53 | * file's size. |
| 54 | * |
| 55 | * Returns: The new offset, or errno |
| 56 | */ |
| 57 | |
| 58 | static loff_t gfs2_llseek(struct file *file, loff_t offset, int whence) |
| 59 | { |
| 60 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
| 61 | struct gfs2_holder i_gh; |
| 62 | loff_t error; |
| 63 | |
| 64 | switch (whence) { |
| 65 | case SEEK_END: |
| 66 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 67 | &i_gh); |
| 68 | if (!error) { |
| 69 | error = generic_file_llseek(file, offset, whence); |
| 70 | gfs2_glock_dq_uninit(&i_gh); |
| 71 | } |
| 72 | break; |
| 73 | |
| 74 | case SEEK_DATA: |
| 75 | error = gfs2_seek_data(file, offset); |
| 76 | break; |
| 77 | |
| 78 | case SEEK_HOLE: |
| 79 | error = gfs2_seek_hole(file, offset); |
| 80 | break; |
| 81 | |
| 82 | case SEEK_CUR: |
| 83 | case SEEK_SET: |
| 84 | /* |
| 85 | * These don't reference inode->i_size and don't depend on the |
| 86 | * block mapping, so we don't need the glock. |
| 87 | */ |
| 88 | error = generic_file_llseek(file, offset, whence); |
| 89 | break; |
| 90 | default: |
| 91 | error = -EINVAL; |
| 92 | } |
| 93 | |
| 94 | return error; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * gfs2_readdir - Iterator for a directory |
| 99 | * @file: The directory to read from |
| 100 | * @ctx: What to feed directory entries to |
| 101 | * |
| 102 | * Returns: errno |
| 103 | */ |
| 104 | |
| 105 | static int gfs2_readdir(struct file *file, struct dir_context *ctx) |
| 106 | { |
| 107 | struct inode *dir = file->f_mapping->host; |
| 108 | struct gfs2_inode *dip = GFS2_I(dir); |
| 109 | struct gfs2_holder d_gh; |
| 110 | int error; |
| 111 | |
| 112 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
| 113 | if (error) |
| 114 | return error; |
| 115 | |
| 116 | error = gfs2_dir_read(dir, ctx, &file->f_ra); |
| 117 | |
| 118 | gfs2_glock_dq_uninit(&d_gh); |
| 119 | |
| 120 | return error; |
| 121 | } |
| 122 | |
| 123 | /* |
| 124 | * struct fsflag_gfs2flag |
| 125 | * |
| 126 | * The FS_JOURNAL_DATA_FL flag maps to GFS2_DIF_INHERIT_JDATA for directories, |
| 127 | * and to GFS2_DIF_JDATA for non-directories. |
| 128 | */ |
| 129 | static struct { |
| 130 | u32 fsflag; |
| 131 | u32 gfsflag; |
| 132 | } fsflag_gfs2flag[] = { |
| 133 | {FS_SYNC_FL, GFS2_DIF_SYNC}, |
| 134 | {FS_IMMUTABLE_FL, GFS2_DIF_IMMUTABLE}, |
| 135 | {FS_APPEND_FL, GFS2_DIF_APPENDONLY}, |
| 136 | {FS_NOATIME_FL, GFS2_DIF_NOATIME}, |
| 137 | {FS_INDEX_FL, GFS2_DIF_EXHASH}, |
| 138 | {FS_TOPDIR_FL, GFS2_DIF_TOPDIR}, |
| 139 | {FS_JOURNAL_DATA_FL, GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA}, |
| 140 | }; |
| 141 | |
| 142 | static inline u32 gfs2_gfsflags_to_fsflags(struct inode *inode, u32 gfsflags) |
| 143 | { |
| 144 | int i; |
| 145 | u32 fsflags = 0; |
| 146 | |
| 147 | if (S_ISDIR(inode->i_mode)) |
| 148 | gfsflags &= ~GFS2_DIF_JDATA; |
| 149 | else |
| 150 | gfsflags &= ~GFS2_DIF_INHERIT_JDATA; |
| 151 | |
| 152 | for (i = 0; i < ARRAY_SIZE(fsflag_gfs2flag); i++) |
| 153 | if (gfsflags & fsflag_gfs2flag[i].gfsflag) |
| 154 | fsflags |= fsflag_gfs2flag[i].fsflag; |
| 155 | return fsflags; |
| 156 | } |
| 157 | |
| 158 | int gfs2_fileattr_get(struct dentry *dentry, struct fileattr *fa) |
| 159 | { |
| 160 | struct inode *inode = d_inode(dentry); |
| 161 | struct gfs2_inode *ip = GFS2_I(inode); |
| 162 | struct gfs2_holder gh; |
| 163 | int error; |
| 164 | u32 fsflags; |
| 165 | |
| 166 | if (d_is_special(dentry)) |
| 167 | return -ENOTTY; |
| 168 | |
| 169 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh); |
| 170 | error = gfs2_glock_nq(&gh); |
| 171 | if (error) |
| 172 | goto out_uninit; |
| 173 | |
| 174 | fsflags = gfs2_gfsflags_to_fsflags(inode, ip->i_diskflags); |
| 175 | |
| 176 | fileattr_fill_flags(fa, fsflags); |
| 177 | |
| 178 | gfs2_glock_dq(&gh); |
| 179 | out_uninit: |
| 180 | gfs2_holder_uninit(&gh); |
| 181 | return error; |
| 182 | } |
| 183 | |
| 184 | void gfs2_set_inode_flags(struct inode *inode) |
| 185 | { |
| 186 | struct gfs2_inode *ip = GFS2_I(inode); |
| 187 | unsigned int flags = inode->i_flags; |
| 188 | |
| 189 | flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_NOSEC); |
| 190 | if ((ip->i_eattr == 0) && !is_sxid(inode->i_mode)) |
| 191 | flags |= S_NOSEC; |
| 192 | if (ip->i_diskflags & GFS2_DIF_IMMUTABLE) |
| 193 | flags |= S_IMMUTABLE; |
| 194 | if (ip->i_diskflags & GFS2_DIF_APPENDONLY) |
| 195 | flags |= S_APPEND; |
| 196 | if (ip->i_diskflags & GFS2_DIF_NOATIME) |
| 197 | flags |= S_NOATIME; |
| 198 | if (ip->i_diskflags & GFS2_DIF_SYNC) |
| 199 | flags |= S_SYNC; |
| 200 | inode->i_flags = flags; |
| 201 | } |
| 202 | |
| 203 | /* Flags that can be set by user space */ |
| 204 | #define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \ |
| 205 | GFS2_DIF_IMMUTABLE| \ |
| 206 | GFS2_DIF_APPENDONLY| \ |
| 207 | GFS2_DIF_NOATIME| \ |
| 208 | GFS2_DIF_SYNC| \ |
| 209 | GFS2_DIF_TOPDIR| \ |
| 210 | GFS2_DIF_INHERIT_JDATA) |
| 211 | |
| 212 | /** |
| 213 | * do_gfs2_set_flags - set flags on an inode |
| 214 | * @inode: The inode |
| 215 | * @reqflags: The flags to set |
| 216 | * @mask: Indicates which flags are valid |
| 217 | * |
| 218 | */ |
| 219 | static int do_gfs2_set_flags(struct inode *inode, u32 reqflags, u32 mask) |
| 220 | { |
| 221 | struct gfs2_inode *ip = GFS2_I(inode); |
| 222 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 223 | struct buffer_head *bh; |
| 224 | struct gfs2_holder gh; |
| 225 | int error; |
| 226 | u32 new_flags, flags; |
| 227 | |
| 228 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 229 | if (error) |
| 230 | return error; |
| 231 | |
| 232 | error = 0; |
| 233 | flags = ip->i_diskflags; |
| 234 | new_flags = (flags & ~mask) | (reqflags & mask); |
| 235 | if ((new_flags ^ flags) == 0) |
| 236 | goto out; |
| 237 | |
| 238 | if (!IS_IMMUTABLE(inode)) { |
| 239 | error = gfs2_permission(&nop_mnt_idmap, inode, MAY_WRITE); |
| 240 | if (error) |
| 241 | goto out; |
| 242 | } |
| 243 | if ((flags ^ new_flags) & GFS2_DIF_JDATA) { |
| 244 | if (new_flags & GFS2_DIF_JDATA) |
| 245 | gfs2_log_flush(sdp, ip->i_gl, |
| 246 | GFS2_LOG_HEAD_FLUSH_NORMAL | |
| 247 | GFS2_LFC_SET_FLAGS); |
| 248 | error = filemap_fdatawrite(inode->i_mapping); |
| 249 | if (error) |
| 250 | goto out; |
| 251 | error = filemap_fdatawait(inode->i_mapping); |
| 252 | if (error) |
| 253 | goto out; |
| 254 | if (new_flags & GFS2_DIF_JDATA) |
| 255 | gfs2_ordered_del_inode(ip); |
| 256 | } |
| 257 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); |
| 258 | if (error) |
| 259 | goto out; |
| 260 | error = gfs2_meta_inode_buffer(ip, &bh); |
| 261 | if (error) |
| 262 | goto out_trans_end; |
| 263 | inode_set_ctime_current(inode); |
| 264 | gfs2_trans_add_meta(ip->i_gl, bh); |
| 265 | ip->i_diskflags = new_flags; |
| 266 | gfs2_dinode_out(ip, bh->b_data); |
| 267 | brelse(bh); |
| 268 | gfs2_set_inode_flags(inode); |
| 269 | gfs2_set_aops(inode); |
| 270 | out_trans_end: |
| 271 | gfs2_trans_end(sdp); |
| 272 | out: |
| 273 | gfs2_glock_dq_uninit(&gh); |
| 274 | return error; |
| 275 | } |
| 276 | |
| 277 | int gfs2_fileattr_set(struct mnt_idmap *idmap, |
| 278 | struct dentry *dentry, struct fileattr *fa) |
| 279 | { |
| 280 | struct inode *inode = d_inode(dentry); |
| 281 | u32 fsflags = fa->flags, gfsflags = 0; |
| 282 | u32 mask; |
| 283 | int i; |
| 284 | |
| 285 | if (d_is_special(dentry)) |
| 286 | return -ENOTTY; |
| 287 | |
| 288 | if (fileattr_has_fsx(fa)) |
| 289 | return -EOPNOTSUPP; |
| 290 | |
| 291 | for (i = 0; i < ARRAY_SIZE(fsflag_gfs2flag); i++) { |
| 292 | if (fsflags & fsflag_gfs2flag[i].fsflag) { |
| 293 | fsflags &= ~fsflag_gfs2flag[i].fsflag; |
| 294 | gfsflags |= fsflag_gfs2flag[i].gfsflag; |
| 295 | } |
| 296 | } |
| 297 | if (fsflags || gfsflags & ~GFS2_FLAGS_USER_SET) |
| 298 | return -EINVAL; |
| 299 | |
| 300 | mask = GFS2_FLAGS_USER_SET; |
| 301 | if (S_ISDIR(inode->i_mode)) { |
| 302 | mask &= ~GFS2_DIF_JDATA; |
| 303 | } else { |
| 304 | /* The GFS2_DIF_TOPDIR flag is only valid for directories. */ |
| 305 | if (gfsflags & GFS2_DIF_TOPDIR) |
| 306 | return -EINVAL; |
| 307 | mask &= ~(GFS2_DIF_TOPDIR | GFS2_DIF_INHERIT_JDATA); |
| 308 | } |
| 309 | |
| 310 | return do_gfs2_set_flags(inode, gfsflags, mask); |
| 311 | } |
| 312 | |
| 313 | static int gfs2_getlabel(struct file *filp, char __user *label) |
| 314 | { |
| 315 | struct inode *inode = file_inode(filp); |
| 316 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 317 | |
| 318 | if (copy_to_user(label, sdp->sd_sb.sb_locktable, GFS2_LOCKNAME_LEN)) |
| 319 | return -EFAULT; |
| 320 | |
| 321 | return 0; |
| 322 | } |
| 323 | |
| 324 | static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 325 | { |
| 326 | switch(cmd) { |
| 327 | case FITRIM: |
| 328 | return gfs2_fitrim(filp, (void __user *)arg); |
| 329 | case FS_IOC_GETFSLABEL: |
| 330 | return gfs2_getlabel(filp, (char __user *)arg); |
| 331 | } |
| 332 | |
| 333 | return -ENOTTY; |
| 334 | } |
| 335 | |
| 336 | #ifdef CONFIG_COMPAT |
| 337 | static long gfs2_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 338 | { |
| 339 | switch(cmd) { |
| 340 | /* Keep this list in sync with gfs2_ioctl */ |
| 341 | case FITRIM: |
| 342 | case FS_IOC_GETFSLABEL: |
| 343 | break; |
| 344 | default: |
| 345 | return -ENOIOCTLCMD; |
| 346 | } |
| 347 | |
| 348 | return gfs2_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); |
| 349 | } |
| 350 | #else |
| 351 | #define gfs2_compat_ioctl NULL |
| 352 | #endif |
| 353 | |
| 354 | /** |
| 355 | * gfs2_size_hint - Give a hint to the size of a write request |
| 356 | * @filep: The struct file |
| 357 | * @offset: The file offset of the write |
| 358 | * @size: The length of the write |
| 359 | * |
| 360 | * When we are about to do a write, this function records the total |
| 361 | * write size in order to provide a suitable hint to the lower layers |
| 362 | * about how many blocks will be required. |
| 363 | * |
| 364 | */ |
| 365 | |
| 366 | static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size) |
| 367 | { |
| 368 | struct inode *inode = file_inode(filep); |
| 369 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 370 | struct gfs2_inode *ip = GFS2_I(inode); |
| 371 | size_t blks = (size + sdp->sd_sb.sb_bsize - 1) >> sdp->sd_sb.sb_bsize_shift; |
| 372 | int hint = min_t(size_t, INT_MAX, blks); |
| 373 | |
| 374 | if (hint > atomic_read(&ip->i_sizehint)) |
| 375 | atomic_set(&ip->i_sizehint, hint); |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * gfs2_allocate_folio_backing - Allocate blocks for a write fault |
| 380 | * @folio: The (locked) folio to allocate backing for |
| 381 | * @length: Size of the allocation |
| 382 | * |
| 383 | * We try to allocate all the blocks required for the folio in one go. This |
| 384 | * might fail for various reasons, so we keep trying until all the blocks to |
| 385 | * back this folio are allocated. If some of the blocks are already allocated, |
| 386 | * that is ok too. |
| 387 | */ |
| 388 | static int gfs2_allocate_folio_backing(struct folio *folio, size_t length) |
| 389 | { |
| 390 | u64 pos = folio_pos(folio); |
| 391 | |
| 392 | do { |
| 393 | struct iomap iomap = { }; |
| 394 | |
| 395 | if (gfs2_iomap_alloc(folio->mapping->host, pos, length, &iomap)) |
| 396 | return -EIO; |
| 397 | |
| 398 | if (length < iomap.length) |
| 399 | iomap.length = length; |
| 400 | length -= iomap.length; |
| 401 | pos += iomap.length; |
| 402 | } while (length > 0); |
| 403 | |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | /** |
| 408 | * gfs2_page_mkwrite - Make a shared, mmap()ed, page writable |
| 409 | * @vmf: The virtual memory fault containing the page to become writable |
| 410 | * |
| 411 | * When the page becomes writable, we need to ensure that we have |
| 412 | * blocks allocated on disk to back that page. |
| 413 | */ |
| 414 | |
| 415 | static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf) |
| 416 | { |
| 417 | struct folio *folio = page_folio(vmf->page); |
| 418 | struct inode *inode = file_inode(vmf->vma->vm_file); |
| 419 | struct gfs2_inode *ip = GFS2_I(inode); |
| 420 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 421 | struct gfs2_alloc_parms ap = {}; |
| 422 | u64 pos = folio_pos(folio); |
| 423 | unsigned int data_blocks, ind_blocks, rblocks; |
| 424 | vm_fault_t ret = VM_FAULT_LOCKED; |
| 425 | struct gfs2_holder gh; |
| 426 | size_t length; |
| 427 | loff_t size; |
| 428 | int err; |
| 429 | |
| 430 | sb_start_pagefault(inode->i_sb); |
| 431 | |
| 432 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 433 | err = gfs2_glock_nq(&gh); |
| 434 | if (err) { |
| 435 | ret = vmf_fs_error(err); |
| 436 | goto out_uninit; |
| 437 | } |
| 438 | |
| 439 | /* Check folio index against inode size */ |
| 440 | size = i_size_read(inode); |
| 441 | if (pos >= size) { |
| 442 | ret = VM_FAULT_SIGBUS; |
| 443 | goto out_unlock; |
| 444 | } |
| 445 | |
| 446 | /* Update file times before taking folio lock */ |
| 447 | file_update_time(vmf->vma->vm_file); |
| 448 | |
| 449 | /* folio is wholly or partially inside EOF */ |
| 450 | if (size - pos < folio_size(folio)) |
| 451 | length = size - pos; |
| 452 | else |
| 453 | length = folio_size(folio); |
| 454 | |
| 455 | gfs2_size_hint(vmf->vma->vm_file, pos, length); |
| 456 | |
| 457 | set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); |
| 458 | set_bit(GIF_SW_PAGED, &ip->i_flags); |
| 459 | |
| 460 | /* |
| 461 | * iomap_writepage / iomap_writepages currently don't support inline |
| 462 | * files, so always unstuff here. |
| 463 | */ |
| 464 | |
| 465 | if (!gfs2_is_stuffed(ip) && |
| 466 | !gfs2_write_alloc_required(ip, pos, length)) { |
| 467 | folio_lock(folio); |
| 468 | if (!folio_test_uptodate(folio) || |
| 469 | folio->mapping != inode->i_mapping) { |
| 470 | ret = VM_FAULT_NOPAGE; |
| 471 | folio_unlock(folio); |
| 472 | } |
| 473 | goto out_unlock; |
| 474 | } |
| 475 | |
| 476 | err = gfs2_rindex_update(sdp); |
| 477 | if (err) { |
| 478 | ret = vmf_fs_error(err); |
| 479 | goto out_unlock; |
| 480 | } |
| 481 | |
| 482 | gfs2_write_calc_reserv(ip, length, &data_blocks, &ind_blocks); |
| 483 | ap.target = data_blocks + ind_blocks; |
| 484 | err = gfs2_quota_lock_check(ip, &ap); |
| 485 | if (err) { |
| 486 | ret = vmf_fs_error(err); |
| 487 | goto out_unlock; |
| 488 | } |
| 489 | err = gfs2_inplace_reserve(ip, &ap); |
| 490 | if (err) { |
| 491 | ret = vmf_fs_error(err); |
| 492 | goto out_quota_unlock; |
| 493 | } |
| 494 | |
| 495 | rblocks = RES_DINODE + ind_blocks; |
| 496 | if (gfs2_is_jdata(ip)) |
| 497 | rblocks += data_blocks ? data_blocks : 1; |
| 498 | if (ind_blocks || data_blocks) { |
| 499 | rblocks += RES_STATFS + RES_QUOTA; |
| 500 | rblocks += gfs2_rg_blocks(ip, data_blocks + ind_blocks); |
| 501 | } |
| 502 | err = gfs2_trans_begin(sdp, rblocks, 0); |
| 503 | if (err) { |
| 504 | ret = vmf_fs_error(err); |
| 505 | goto out_trans_fail; |
| 506 | } |
| 507 | |
| 508 | /* Unstuff, if required, and allocate backing blocks for folio */ |
| 509 | if (gfs2_is_stuffed(ip)) { |
| 510 | err = gfs2_unstuff_dinode(ip); |
| 511 | if (err) { |
| 512 | ret = vmf_fs_error(err); |
| 513 | goto out_trans_end; |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | folio_lock(folio); |
| 518 | /* If truncated, we must retry the operation, we may have raced |
| 519 | * with the glock demotion code. |
| 520 | */ |
| 521 | if (!folio_test_uptodate(folio) || folio->mapping != inode->i_mapping) { |
| 522 | ret = VM_FAULT_NOPAGE; |
| 523 | goto out_page_locked; |
| 524 | } |
| 525 | |
| 526 | err = gfs2_allocate_folio_backing(folio, length); |
| 527 | if (err) |
| 528 | ret = vmf_fs_error(err); |
| 529 | |
| 530 | out_page_locked: |
| 531 | if (ret != VM_FAULT_LOCKED) |
| 532 | folio_unlock(folio); |
| 533 | out_trans_end: |
| 534 | gfs2_trans_end(sdp); |
| 535 | out_trans_fail: |
| 536 | gfs2_inplace_release(ip); |
| 537 | out_quota_unlock: |
| 538 | gfs2_quota_unlock(ip); |
| 539 | out_unlock: |
| 540 | gfs2_glock_dq(&gh); |
| 541 | out_uninit: |
| 542 | gfs2_holder_uninit(&gh); |
| 543 | if (ret == VM_FAULT_LOCKED) { |
| 544 | folio_mark_dirty(folio); |
| 545 | folio_wait_stable(folio); |
| 546 | } |
| 547 | sb_end_pagefault(inode->i_sb); |
| 548 | return ret; |
| 549 | } |
| 550 | |
| 551 | static vm_fault_t gfs2_fault(struct vm_fault *vmf) |
| 552 | { |
| 553 | struct inode *inode = file_inode(vmf->vma->vm_file); |
| 554 | struct gfs2_inode *ip = GFS2_I(inode); |
| 555 | struct gfs2_holder gh; |
| 556 | vm_fault_t ret; |
| 557 | int err; |
| 558 | |
| 559 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh); |
| 560 | err = gfs2_glock_nq(&gh); |
| 561 | if (err) { |
| 562 | ret = vmf_fs_error(err); |
| 563 | goto out_uninit; |
| 564 | } |
| 565 | ret = filemap_fault(vmf); |
| 566 | gfs2_glock_dq(&gh); |
| 567 | out_uninit: |
| 568 | gfs2_holder_uninit(&gh); |
| 569 | return ret; |
| 570 | } |
| 571 | |
| 572 | static const struct vm_operations_struct gfs2_vm_ops = { |
| 573 | .fault = gfs2_fault, |
| 574 | .map_pages = filemap_map_pages, |
| 575 | .page_mkwrite = gfs2_page_mkwrite, |
| 576 | }; |
| 577 | |
| 578 | /** |
| 579 | * gfs2_mmap |
| 580 | * @file: The file to map |
| 581 | * @vma: The VMA which described the mapping |
| 582 | * |
| 583 | * There is no need to get a lock here unless we should be updating |
| 584 | * atime. We ignore any locking errors since the only consequence is |
| 585 | * a missed atime update (which will just be deferred until later). |
| 586 | * |
| 587 | * Returns: 0 |
| 588 | */ |
| 589 | |
| 590 | static int gfs2_mmap(struct file *file, struct vm_area_struct *vma) |
| 591 | { |
| 592 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
| 593 | |
| 594 | if (!(file->f_flags & O_NOATIME) && |
| 595 | !IS_NOATIME(&ip->i_inode)) { |
| 596 | struct gfs2_holder i_gh; |
| 597 | int error; |
| 598 | |
| 599 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 600 | &i_gh); |
| 601 | if (error) |
| 602 | return error; |
| 603 | /* grab lock to update inode */ |
| 604 | gfs2_glock_dq_uninit(&i_gh); |
| 605 | file_accessed(file); |
| 606 | } |
| 607 | vma->vm_ops = &gfs2_vm_ops; |
| 608 | |
| 609 | return 0; |
| 610 | } |
| 611 | |
| 612 | /** |
| 613 | * gfs2_open_common - This is common to open and atomic_open |
| 614 | * @inode: The inode being opened |
| 615 | * @file: The file being opened |
| 616 | * |
| 617 | * This maybe called under a glock or not depending upon how it has |
| 618 | * been called. We must always be called under a glock for regular |
| 619 | * files, however. For other file types, it does not matter whether |
| 620 | * we hold the glock or not. |
| 621 | * |
| 622 | * Returns: Error code or 0 for success |
| 623 | */ |
| 624 | |
| 625 | int gfs2_open_common(struct inode *inode, struct file *file) |
| 626 | { |
| 627 | struct gfs2_file *fp; |
| 628 | int ret; |
| 629 | |
| 630 | if (S_ISREG(inode->i_mode)) { |
| 631 | ret = generic_file_open(inode, file); |
| 632 | if (ret) |
| 633 | return ret; |
| 634 | |
| 635 | if (!gfs2_is_jdata(GFS2_I(inode))) |
| 636 | file->f_mode |= FMODE_CAN_ODIRECT; |
| 637 | } |
| 638 | |
| 639 | fp = kzalloc(sizeof(struct gfs2_file), GFP_NOFS); |
| 640 | if (!fp) |
| 641 | return -ENOMEM; |
| 642 | |
| 643 | mutex_init(&fp->f_fl_mutex); |
| 644 | |
| 645 | gfs2_assert_warn(GFS2_SB(inode), !file->private_data); |
| 646 | file->private_data = fp; |
| 647 | if (file->f_mode & FMODE_WRITE) { |
| 648 | ret = gfs2_qa_get(GFS2_I(inode)); |
| 649 | if (ret) |
| 650 | goto fail; |
| 651 | } |
| 652 | return 0; |
| 653 | |
| 654 | fail: |
| 655 | kfree(file->private_data); |
| 656 | file->private_data = NULL; |
| 657 | return ret; |
| 658 | } |
| 659 | |
| 660 | /** |
| 661 | * gfs2_open - open a file |
| 662 | * @inode: the inode to open |
| 663 | * @file: the struct file for this opening |
| 664 | * |
| 665 | * After atomic_open, this function is only used for opening files |
| 666 | * which are already cached. We must still get the glock for regular |
| 667 | * files to ensure that we have the file size uptodate for the large |
| 668 | * file check which is in the common code. That is only an issue for |
| 669 | * regular files though. |
| 670 | * |
| 671 | * Returns: errno |
| 672 | */ |
| 673 | |
| 674 | static int gfs2_open(struct inode *inode, struct file *file) |
| 675 | { |
| 676 | struct gfs2_inode *ip = GFS2_I(inode); |
| 677 | struct gfs2_holder i_gh; |
| 678 | int error; |
| 679 | bool need_unlock = false; |
| 680 | |
| 681 | if (S_ISREG(ip->i_inode.i_mode)) { |
| 682 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, |
| 683 | &i_gh); |
| 684 | if (error) |
| 685 | return error; |
| 686 | need_unlock = true; |
| 687 | } |
| 688 | |
| 689 | error = gfs2_open_common(inode, file); |
| 690 | |
| 691 | if (need_unlock) |
| 692 | gfs2_glock_dq_uninit(&i_gh); |
| 693 | |
| 694 | return error; |
| 695 | } |
| 696 | |
| 697 | /** |
| 698 | * gfs2_release - called to close a struct file |
| 699 | * @inode: the inode the struct file belongs to |
| 700 | * @file: the struct file being closed |
| 701 | * |
| 702 | * Returns: errno |
| 703 | */ |
| 704 | |
| 705 | static int gfs2_release(struct inode *inode, struct file *file) |
| 706 | { |
| 707 | struct gfs2_inode *ip = GFS2_I(inode); |
| 708 | |
| 709 | kfree(file->private_data); |
| 710 | file->private_data = NULL; |
| 711 | |
| 712 | if (file->f_mode & FMODE_WRITE) { |
| 713 | if (gfs2_rs_active(&ip->i_res)) |
| 714 | gfs2_rs_delete(ip); |
| 715 | gfs2_qa_put(ip); |
| 716 | } |
| 717 | return 0; |
| 718 | } |
| 719 | |
| 720 | /** |
| 721 | * gfs2_fsync - sync the dirty data for a file (across the cluster) |
| 722 | * @file: the file that points to the dentry |
| 723 | * @start: the start position in the file to sync |
| 724 | * @end: the end position in the file to sync |
| 725 | * @datasync: set if we can ignore timestamp changes |
| 726 | * |
| 727 | * We split the data flushing here so that we don't wait for the data |
| 728 | * until after we've also sent the metadata to disk. Note that for |
| 729 | * data=ordered, we will write & wait for the data at the log flush |
| 730 | * stage anyway, so this is unlikely to make much of a difference |
| 731 | * except in the data=writeback case. |
| 732 | * |
| 733 | * If the fdatawrite fails due to any reason except -EIO, we will |
| 734 | * continue the remainder of the fsync, although we'll still report |
| 735 | * the error at the end. This is to match filemap_write_and_wait_range() |
| 736 | * behaviour. |
| 737 | * |
| 738 | * Returns: errno |
| 739 | */ |
| 740 | |
| 741 | static int gfs2_fsync(struct file *file, loff_t start, loff_t end, |
| 742 | int datasync) |
| 743 | { |
| 744 | struct address_space *mapping = file->f_mapping; |
| 745 | struct inode *inode = mapping->host; |
| 746 | int sync_state = inode->i_state & I_DIRTY; |
| 747 | struct gfs2_inode *ip = GFS2_I(inode); |
| 748 | int ret = 0, ret1 = 0; |
| 749 | |
| 750 | if (mapping->nrpages) { |
| 751 | ret1 = filemap_fdatawrite_range(mapping, start, end); |
| 752 | if (ret1 == -EIO) |
| 753 | return ret1; |
| 754 | } |
| 755 | |
| 756 | if (!gfs2_is_jdata(ip)) |
| 757 | sync_state &= ~I_DIRTY_PAGES; |
| 758 | if (datasync) |
| 759 | sync_state &= ~I_DIRTY_SYNC; |
| 760 | |
| 761 | if (sync_state) { |
| 762 | ret = sync_inode_metadata(inode, 1); |
| 763 | if (ret) |
| 764 | return ret; |
| 765 | if (gfs2_is_jdata(ip)) |
| 766 | ret = file_write_and_wait(file); |
| 767 | if (ret) |
| 768 | return ret; |
| 769 | gfs2_ail_flush(ip->i_gl, 1); |
| 770 | } |
| 771 | |
| 772 | if (mapping->nrpages) |
| 773 | ret = file_fdatawait_range(file, start, end); |
| 774 | |
| 775 | return ret ? ret : ret1; |
| 776 | } |
| 777 | |
| 778 | static inline bool should_fault_in_pages(struct iov_iter *i, |
| 779 | struct kiocb *iocb, |
| 780 | size_t *prev_count, |
| 781 | size_t *window_size) |
| 782 | { |
| 783 | size_t count = iov_iter_count(i); |
| 784 | size_t size, offs; |
| 785 | |
| 786 | if (!count) |
| 787 | return false; |
| 788 | if (!user_backed_iter(i)) |
| 789 | return false; |
| 790 | |
| 791 | /* |
| 792 | * Try to fault in multiple pages initially. When that doesn't result |
| 793 | * in any progress, fall back to a single page. |
| 794 | */ |
| 795 | size = PAGE_SIZE; |
| 796 | offs = offset_in_page(iocb->ki_pos); |
| 797 | if (*prev_count != count) { |
| 798 | size_t nr_dirtied; |
| 799 | |
| 800 | nr_dirtied = max(current->nr_dirtied_pause - |
| 801 | current->nr_dirtied, 8); |
| 802 | size = min_t(size_t, SZ_1M, nr_dirtied << PAGE_SHIFT); |
| 803 | } |
| 804 | |
| 805 | *prev_count = count; |
| 806 | *window_size = size - offs; |
| 807 | return true; |
| 808 | } |
| 809 | |
| 810 | static ssize_t gfs2_file_direct_read(struct kiocb *iocb, struct iov_iter *to, |
| 811 | struct gfs2_holder *gh) |
| 812 | { |
| 813 | struct file *file = iocb->ki_filp; |
| 814 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
| 815 | size_t prev_count = 0, window_size = 0; |
| 816 | size_t read = 0; |
| 817 | ssize_t ret; |
| 818 | |
| 819 | /* |
| 820 | * In this function, we disable page faults when we're holding the |
| 821 | * inode glock while doing I/O. If a page fault occurs, we indicate |
| 822 | * that the inode glock may be dropped, fault in the pages manually, |
| 823 | * and retry. |
| 824 | * |
| 825 | * Unlike generic_file_read_iter, for reads, iomap_dio_rw can trigger |
| 826 | * physical as well as manual page faults, and we need to disable both |
| 827 | * kinds. |
| 828 | * |
| 829 | * For direct I/O, gfs2 takes the inode glock in deferred mode. This |
| 830 | * locking mode is compatible with other deferred holders, so multiple |
| 831 | * processes and nodes can do direct I/O to a file at the same time. |
| 832 | * There's no guarantee that reads or writes will be atomic. Any |
| 833 | * coordination among readers and writers needs to happen externally. |
| 834 | */ |
| 835 | |
| 836 | if (!iov_iter_count(to)) |
| 837 | return 0; /* skip atime */ |
| 838 | |
| 839 | gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, 0, gh); |
| 840 | retry: |
| 841 | ret = gfs2_glock_nq(gh); |
| 842 | if (ret) |
| 843 | goto out_uninit; |
| 844 | pagefault_disable(); |
| 845 | to->nofault = true; |
| 846 | ret = iomap_dio_rw(iocb, to, &gfs2_iomap_ops, NULL, |
| 847 | IOMAP_DIO_PARTIAL, NULL, read); |
| 848 | to->nofault = false; |
| 849 | pagefault_enable(); |
| 850 | if (ret <= 0 && ret != -EFAULT) |
| 851 | goto out_unlock; |
| 852 | /* No increment (+=) because iomap_dio_rw returns a cumulative value. */ |
| 853 | if (ret > 0) |
| 854 | read = ret; |
| 855 | |
| 856 | if (should_fault_in_pages(to, iocb, &prev_count, &window_size)) { |
| 857 | gfs2_glock_dq(gh); |
| 858 | window_size -= fault_in_iov_iter_writeable(to, window_size); |
| 859 | if (window_size) |
| 860 | goto retry; |
| 861 | } |
| 862 | out_unlock: |
| 863 | if (gfs2_holder_queued(gh)) |
| 864 | gfs2_glock_dq(gh); |
| 865 | out_uninit: |
| 866 | gfs2_holder_uninit(gh); |
| 867 | /* User space doesn't expect partial success. */ |
| 868 | if (ret < 0) |
| 869 | return ret; |
| 870 | return read; |
| 871 | } |
| 872 | |
| 873 | static ssize_t gfs2_file_direct_write(struct kiocb *iocb, struct iov_iter *from, |
| 874 | struct gfs2_holder *gh) |
| 875 | { |
| 876 | struct file *file = iocb->ki_filp; |
| 877 | struct inode *inode = file->f_mapping->host; |
| 878 | struct gfs2_inode *ip = GFS2_I(inode); |
| 879 | size_t prev_count = 0, window_size = 0; |
| 880 | size_t written = 0; |
| 881 | bool enough_retries; |
| 882 | ssize_t ret; |
| 883 | |
| 884 | /* |
| 885 | * In this function, we disable page faults when we're holding the |
| 886 | * inode glock while doing I/O. If a page fault occurs, we indicate |
| 887 | * that the inode glock may be dropped, fault in the pages manually, |
| 888 | * and retry. |
| 889 | * |
| 890 | * For writes, iomap_dio_rw only triggers manual page faults, so we |
| 891 | * don't need to disable physical ones. |
| 892 | */ |
| 893 | |
| 894 | /* |
| 895 | * Deferred lock, even if its a write, since we do no allocation on |
| 896 | * this path. All we need to change is the atime, and this lock mode |
| 897 | * ensures that other nodes have flushed their buffered read caches |
| 898 | * (i.e. their page cache entries for this inode). We do not, |
| 899 | * unfortunately, have the option of only flushing a range like the |
| 900 | * VFS does. |
| 901 | */ |
| 902 | gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, 0, gh); |
| 903 | retry: |
| 904 | ret = gfs2_glock_nq(gh); |
| 905 | if (ret) |
| 906 | goto out_uninit; |
| 907 | /* Silently fall back to buffered I/O when writing beyond EOF */ |
| 908 | if (iocb->ki_pos + iov_iter_count(from) > i_size_read(&ip->i_inode)) |
| 909 | goto out_unlock; |
| 910 | |
| 911 | from->nofault = true; |
| 912 | ret = iomap_dio_rw(iocb, from, &gfs2_iomap_ops, NULL, |
| 913 | IOMAP_DIO_PARTIAL, NULL, written); |
| 914 | from->nofault = false; |
| 915 | if (ret <= 0) { |
| 916 | if (ret == -ENOTBLK) |
| 917 | ret = 0; |
| 918 | if (ret != -EFAULT) |
| 919 | goto out_unlock; |
| 920 | } |
| 921 | /* No increment (+=) because iomap_dio_rw returns a cumulative value. */ |
| 922 | if (ret > 0) |
| 923 | written = ret; |
| 924 | |
| 925 | enough_retries = prev_count == iov_iter_count(from) && |
| 926 | window_size <= PAGE_SIZE; |
| 927 | if (should_fault_in_pages(from, iocb, &prev_count, &window_size)) { |
| 928 | gfs2_glock_dq(gh); |
| 929 | window_size -= fault_in_iov_iter_readable(from, window_size); |
| 930 | if (window_size) { |
| 931 | if (!enough_retries) |
| 932 | goto retry; |
| 933 | /* fall back to buffered I/O */ |
| 934 | ret = 0; |
| 935 | } |
| 936 | } |
| 937 | out_unlock: |
| 938 | if (gfs2_holder_queued(gh)) |
| 939 | gfs2_glock_dq(gh); |
| 940 | out_uninit: |
| 941 | gfs2_holder_uninit(gh); |
| 942 | /* User space doesn't expect partial success. */ |
| 943 | if (ret < 0) |
| 944 | return ret; |
| 945 | return written; |
| 946 | } |
| 947 | |
| 948 | static ssize_t gfs2_file_read_iter(struct kiocb *iocb, struct iov_iter *to) |
| 949 | { |
| 950 | struct gfs2_inode *ip; |
| 951 | struct gfs2_holder gh; |
| 952 | size_t prev_count = 0, window_size = 0; |
| 953 | size_t read = 0; |
| 954 | ssize_t ret; |
| 955 | |
| 956 | /* |
| 957 | * In this function, we disable page faults when we're holding the |
| 958 | * inode glock while doing I/O. If a page fault occurs, we indicate |
| 959 | * that the inode glock may be dropped, fault in the pages manually, |
| 960 | * and retry. |
| 961 | */ |
| 962 | |
| 963 | if (iocb->ki_flags & IOCB_DIRECT) |
| 964 | return gfs2_file_direct_read(iocb, to, &gh); |
| 965 | |
| 966 | pagefault_disable(); |
| 967 | iocb->ki_flags |= IOCB_NOIO; |
| 968 | ret = generic_file_read_iter(iocb, to); |
| 969 | iocb->ki_flags &= ~IOCB_NOIO; |
| 970 | pagefault_enable(); |
| 971 | if (ret >= 0) { |
| 972 | if (!iov_iter_count(to)) |
| 973 | return ret; |
| 974 | read = ret; |
| 975 | } else if (ret != -EFAULT) { |
| 976 | if (ret != -EAGAIN) |
| 977 | return ret; |
| 978 | if (iocb->ki_flags & IOCB_NOWAIT) |
| 979 | return ret; |
| 980 | } |
| 981 | ip = GFS2_I(iocb->ki_filp->f_mapping->host); |
| 982 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh); |
| 983 | retry: |
| 984 | ret = gfs2_glock_nq(&gh); |
| 985 | if (ret) |
| 986 | goto out_uninit; |
| 987 | pagefault_disable(); |
| 988 | ret = generic_file_read_iter(iocb, to); |
| 989 | pagefault_enable(); |
| 990 | if (ret <= 0 && ret != -EFAULT) |
| 991 | goto out_unlock; |
| 992 | if (ret > 0) |
| 993 | read += ret; |
| 994 | |
| 995 | if (should_fault_in_pages(to, iocb, &prev_count, &window_size)) { |
| 996 | gfs2_glock_dq(&gh); |
| 997 | window_size -= fault_in_iov_iter_writeable(to, window_size); |
| 998 | if (window_size) |
| 999 | goto retry; |
| 1000 | } |
| 1001 | out_unlock: |
| 1002 | if (gfs2_holder_queued(&gh)) |
| 1003 | gfs2_glock_dq(&gh); |
| 1004 | out_uninit: |
| 1005 | gfs2_holder_uninit(&gh); |
| 1006 | return read ? read : ret; |
| 1007 | } |
| 1008 | |
| 1009 | static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, |
| 1010 | struct iov_iter *from, |
| 1011 | struct gfs2_holder *gh) |
| 1012 | { |
| 1013 | struct file *file = iocb->ki_filp; |
| 1014 | struct inode *inode = file_inode(file); |
| 1015 | struct gfs2_inode *ip = GFS2_I(inode); |
| 1016 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 1017 | struct gfs2_holder *statfs_gh = NULL; |
| 1018 | size_t prev_count = 0, window_size = 0; |
| 1019 | size_t orig_count = iov_iter_count(from); |
| 1020 | size_t written = 0; |
| 1021 | ssize_t ret; |
| 1022 | |
| 1023 | /* |
| 1024 | * In this function, we disable page faults when we're holding the |
| 1025 | * inode glock while doing I/O. If a page fault occurs, we indicate |
| 1026 | * that the inode glock may be dropped, fault in the pages manually, |
| 1027 | * and retry. |
| 1028 | */ |
| 1029 | |
| 1030 | if (inode == sdp->sd_rindex) { |
| 1031 | statfs_gh = kmalloc(sizeof(*statfs_gh), GFP_NOFS); |
| 1032 | if (!statfs_gh) |
| 1033 | return -ENOMEM; |
| 1034 | } |
| 1035 | |
| 1036 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, gh); |
| 1037 | if (should_fault_in_pages(from, iocb, &prev_count, &window_size)) { |
| 1038 | retry: |
| 1039 | window_size -= fault_in_iov_iter_readable(from, window_size); |
| 1040 | if (!window_size) { |
| 1041 | ret = -EFAULT; |
| 1042 | goto out_uninit; |
| 1043 | } |
| 1044 | from->count = min(from->count, window_size); |
| 1045 | } |
| 1046 | ret = gfs2_glock_nq(gh); |
| 1047 | if (ret) |
| 1048 | goto out_uninit; |
| 1049 | |
| 1050 | if (inode == sdp->sd_rindex) { |
| 1051 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
| 1052 | |
| 1053 | ret = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, |
| 1054 | GL_NOCACHE, statfs_gh); |
| 1055 | if (ret) |
| 1056 | goto out_unlock; |
| 1057 | } |
| 1058 | |
| 1059 | pagefault_disable(); |
| 1060 | ret = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops); |
| 1061 | pagefault_enable(); |
| 1062 | if (ret > 0) |
| 1063 | written += ret; |
| 1064 | |
| 1065 | if (inode == sdp->sd_rindex) |
| 1066 | gfs2_glock_dq_uninit(statfs_gh); |
| 1067 | |
| 1068 | if (ret <= 0 && ret != -EFAULT) |
| 1069 | goto out_unlock; |
| 1070 | |
| 1071 | from->count = orig_count - written; |
| 1072 | if (should_fault_in_pages(from, iocb, &prev_count, &window_size)) { |
| 1073 | gfs2_glock_dq(gh); |
| 1074 | goto retry; |
| 1075 | } |
| 1076 | out_unlock: |
| 1077 | if (gfs2_holder_queued(gh)) |
| 1078 | gfs2_glock_dq(gh); |
| 1079 | out_uninit: |
| 1080 | gfs2_holder_uninit(gh); |
| 1081 | kfree(statfs_gh); |
| 1082 | from->count = orig_count - written; |
| 1083 | return written ? written : ret; |
| 1084 | } |
| 1085 | |
| 1086 | /** |
| 1087 | * gfs2_file_write_iter - Perform a write to a file |
| 1088 | * @iocb: The io context |
| 1089 | * @from: The data to write |
| 1090 | * |
| 1091 | * We have to do a lock/unlock here to refresh the inode size for |
| 1092 | * O_APPEND writes, otherwise we can land up writing at the wrong |
| 1093 | * offset. There is still a race, but provided the app is using its |
| 1094 | * own file locking, this will make O_APPEND work as expected. |
| 1095 | * |
| 1096 | */ |
| 1097 | |
| 1098 | static ssize_t gfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
| 1099 | { |
| 1100 | struct file *file = iocb->ki_filp; |
| 1101 | struct inode *inode = file_inode(file); |
| 1102 | struct gfs2_inode *ip = GFS2_I(inode); |
| 1103 | struct gfs2_holder gh; |
| 1104 | ssize_t ret; |
| 1105 | |
| 1106 | gfs2_size_hint(file, iocb->ki_pos, iov_iter_count(from)); |
| 1107 | |
| 1108 | if (iocb->ki_flags & IOCB_APPEND) { |
| 1109 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); |
| 1110 | if (ret) |
| 1111 | return ret; |
| 1112 | gfs2_glock_dq_uninit(&gh); |
| 1113 | } |
| 1114 | |
| 1115 | inode_lock(inode); |
| 1116 | ret = generic_write_checks(iocb, from); |
| 1117 | if (ret <= 0) |
| 1118 | goto out_unlock; |
| 1119 | |
| 1120 | ret = file_remove_privs(file); |
| 1121 | if (ret) |
| 1122 | goto out_unlock; |
| 1123 | |
| 1124 | if (iocb->ki_flags & IOCB_DIRECT) { |
| 1125 | struct address_space *mapping = file->f_mapping; |
| 1126 | ssize_t buffered, ret2; |
| 1127 | |
| 1128 | /* |
| 1129 | * Note that under direct I/O, we don't allow and inode |
| 1130 | * timestamp updates, so we're not calling file_update_time() |
| 1131 | * here. |
| 1132 | */ |
| 1133 | |
| 1134 | ret = gfs2_file_direct_write(iocb, from, &gh); |
| 1135 | if (ret < 0 || !iov_iter_count(from)) |
| 1136 | goto out_unlock; |
| 1137 | |
| 1138 | iocb->ki_flags |= IOCB_DSYNC; |
| 1139 | buffered = gfs2_file_buffered_write(iocb, from, &gh); |
| 1140 | if (unlikely(buffered <= 0)) { |
| 1141 | if (!ret) |
| 1142 | ret = buffered; |
| 1143 | goto out_unlock; |
| 1144 | } |
| 1145 | |
| 1146 | /* |
| 1147 | * We need to ensure that the page cache pages are written to |
| 1148 | * disk and invalidated to preserve the expected O_DIRECT |
| 1149 | * semantics. If the writeback or invalidate fails, only report |
| 1150 | * the direct I/O range as we don't know if the buffered pages |
| 1151 | * made it to disk. |
| 1152 | */ |
| 1153 | ret2 = generic_write_sync(iocb, buffered); |
| 1154 | invalidate_mapping_pages(mapping, |
| 1155 | (iocb->ki_pos - buffered) >> PAGE_SHIFT, |
| 1156 | (iocb->ki_pos - 1) >> PAGE_SHIFT); |
| 1157 | if (!ret || ret2 > 0) |
| 1158 | ret += ret2; |
| 1159 | } else { |
| 1160 | ret = file_update_time(file); |
| 1161 | if (ret) |
| 1162 | goto out_unlock; |
| 1163 | |
| 1164 | ret = gfs2_file_buffered_write(iocb, from, &gh); |
| 1165 | if (likely(ret > 0)) |
| 1166 | ret = generic_write_sync(iocb, ret); |
| 1167 | } |
| 1168 | |
| 1169 | out_unlock: |
| 1170 | inode_unlock(inode); |
| 1171 | return ret; |
| 1172 | } |
| 1173 | |
| 1174 | static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len, |
| 1175 | int mode) |
| 1176 | { |
| 1177 | struct super_block *sb = inode->i_sb; |
| 1178 | struct gfs2_inode *ip = GFS2_I(inode); |
| 1179 | loff_t end = offset + len; |
| 1180 | struct buffer_head *dibh; |
| 1181 | int error; |
| 1182 | |
| 1183 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1184 | if (unlikely(error)) |
| 1185 | return error; |
| 1186 | |
| 1187 | gfs2_trans_add_meta(ip->i_gl, dibh); |
| 1188 | |
| 1189 | if (gfs2_is_stuffed(ip)) { |
| 1190 | error = gfs2_unstuff_dinode(ip); |
| 1191 | if (unlikely(error)) |
| 1192 | goto out; |
| 1193 | } |
| 1194 | |
| 1195 | while (offset < end) { |
| 1196 | struct iomap iomap = { }; |
| 1197 | |
| 1198 | error = gfs2_iomap_alloc(inode, offset, end - offset, &iomap); |
| 1199 | if (error) |
| 1200 | goto out; |
| 1201 | offset = iomap.offset + iomap.length; |
| 1202 | if (!(iomap.flags & IOMAP_F_NEW)) |
| 1203 | continue; |
| 1204 | error = sb_issue_zeroout(sb, iomap.addr >> inode->i_blkbits, |
| 1205 | iomap.length >> inode->i_blkbits, |
| 1206 | GFP_NOFS); |
| 1207 | if (error) { |
| 1208 | fs_err(GFS2_SB(inode), "Failed to zero data buffers\n"); |
| 1209 | goto out; |
| 1210 | } |
| 1211 | } |
| 1212 | out: |
| 1213 | brelse(dibh); |
| 1214 | return error; |
| 1215 | } |
| 1216 | |
| 1217 | /** |
| 1218 | * calc_max_reserv() - Reverse of write_calc_reserv. Given a number of |
| 1219 | * blocks, determine how many bytes can be written. |
| 1220 | * @ip: The inode in question. |
| 1221 | * @len: Max cap of bytes. What we return in *len must be <= this. |
| 1222 | * @data_blocks: Compute and return the number of data blocks needed |
| 1223 | * @ind_blocks: Compute and return the number of indirect blocks needed |
| 1224 | * @max_blocks: The total blocks available to work with. |
| 1225 | * |
| 1226 | * Returns: void, but @len, @data_blocks and @ind_blocks are filled in. |
| 1227 | */ |
| 1228 | static void calc_max_reserv(struct gfs2_inode *ip, loff_t *len, |
| 1229 | unsigned int *data_blocks, unsigned int *ind_blocks, |
| 1230 | unsigned int max_blocks) |
| 1231 | { |
| 1232 | loff_t max = *len; |
| 1233 | const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| 1234 | unsigned int tmp, max_data = max_blocks - 3 * (sdp->sd_max_height - 1); |
| 1235 | |
| 1236 | for (tmp = max_data; tmp > sdp->sd_diptrs;) { |
| 1237 | tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); |
| 1238 | max_data -= tmp; |
| 1239 | } |
| 1240 | |
| 1241 | *data_blocks = max_data; |
| 1242 | *ind_blocks = max_blocks - max_data; |
| 1243 | *len = ((loff_t)max_data - 3) << sdp->sd_sb.sb_bsize_shift; |
| 1244 | if (*len > max) { |
| 1245 | *len = max; |
| 1246 | gfs2_write_calc_reserv(ip, max, data_blocks, ind_blocks); |
| 1247 | } |
| 1248 | } |
| 1249 | |
| 1250 | static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len) |
| 1251 | { |
| 1252 | struct inode *inode = file_inode(file); |
| 1253 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 1254 | struct gfs2_inode *ip = GFS2_I(inode); |
| 1255 | struct gfs2_alloc_parms ap = {}; |
| 1256 | unsigned int data_blocks = 0, ind_blocks = 0, rblocks; |
| 1257 | loff_t bytes, max_bytes, max_blks; |
| 1258 | int error; |
| 1259 | const loff_t pos = offset; |
| 1260 | const loff_t count = len; |
| 1261 | loff_t bsize_mask = ~((loff_t)sdp->sd_sb.sb_bsize - 1); |
| 1262 | loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift; |
| 1263 | loff_t max_chunk_size = UINT_MAX & bsize_mask; |
| 1264 | |
| 1265 | next = (next + 1) << sdp->sd_sb.sb_bsize_shift; |
| 1266 | |
| 1267 | offset &= bsize_mask; |
| 1268 | |
| 1269 | len = next - offset; |
| 1270 | bytes = sdp->sd_max_rg_data * sdp->sd_sb.sb_bsize / 2; |
| 1271 | if (!bytes) |
| 1272 | bytes = UINT_MAX; |
| 1273 | bytes &= bsize_mask; |
| 1274 | if (bytes == 0) |
| 1275 | bytes = sdp->sd_sb.sb_bsize; |
| 1276 | |
| 1277 | gfs2_size_hint(file, offset, len); |
| 1278 | |
| 1279 | gfs2_write_calc_reserv(ip, PAGE_SIZE, &data_blocks, &ind_blocks); |
| 1280 | ap.min_target = data_blocks + ind_blocks; |
| 1281 | |
| 1282 | while (len > 0) { |
| 1283 | if (len < bytes) |
| 1284 | bytes = len; |
| 1285 | if (!gfs2_write_alloc_required(ip, offset, bytes)) { |
| 1286 | len -= bytes; |
| 1287 | offset += bytes; |
| 1288 | continue; |
| 1289 | } |
| 1290 | |
| 1291 | /* We need to determine how many bytes we can actually |
| 1292 | * fallocate without exceeding quota or going over the |
| 1293 | * end of the fs. We start off optimistically by assuming |
| 1294 | * we can write max_bytes */ |
| 1295 | max_bytes = (len > max_chunk_size) ? max_chunk_size : len; |
| 1296 | |
| 1297 | /* Since max_bytes is most likely a theoretical max, we |
| 1298 | * calculate a more realistic 'bytes' to serve as a good |
| 1299 | * starting point for the number of bytes we may be able |
| 1300 | * to write */ |
| 1301 | gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks); |
| 1302 | ap.target = data_blocks + ind_blocks; |
| 1303 | |
| 1304 | error = gfs2_quota_lock_check(ip, &ap); |
| 1305 | if (error) |
| 1306 | return error; |
| 1307 | /* ap.allowed tells us how many blocks quota will allow |
| 1308 | * us to write. Check if this reduces max_blks */ |
| 1309 | max_blks = UINT_MAX; |
| 1310 | if (ap.allowed) |
| 1311 | max_blks = ap.allowed; |
| 1312 | |
| 1313 | error = gfs2_inplace_reserve(ip, &ap); |
| 1314 | if (error) |
| 1315 | goto out_qunlock; |
| 1316 | |
| 1317 | /* check if the selected rgrp limits our max_blks further */ |
| 1318 | if (ip->i_res.rs_reserved < max_blks) |
| 1319 | max_blks = ip->i_res.rs_reserved; |
| 1320 | |
| 1321 | /* Almost done. Calculate bytes that can be written using |
| 1322 | * max_blks. We also recompute max_bytes, data_blocks and |
| 1323 | * ind_blocks */ |
| 1324 | calc_max_reserv(ip, &max_bytes, &data_blocks, |
| 1325 | &ind_blocks, max_blks); |
| 1326 | |
| 1327 | rblocks = RES_DINODE + ind_blocks + RES_STATFS + RES_QUOTA + |
| 1328 | RES_RG_HDR + gfs2_rg_blocks(ip, data_blocks + ind_blocks); |
| 1329 | if (gfs2_is_jdata(ip)) |
| 1330 | rblocks += data_blocks ? data_blocks : 1; |
| 1331 | |
| 1332 | error = gfs2_trans_begin(sdp, rblocks, |
| 1333 | PAGE_SIZE >> inode->i_blkbits); |
| 1334 | if (error) |
| 1335 | goto out_trans_fail; |
| 1336 | |
| 1337 | error = fallocate_chunk(inode, offset, max_bytes, mode); |
| 1338 | gfs2_trans_end(sdp); |
| 1339 | |
| 1340 | if (error) |
| 1341 | goto out_trans_fail; |
| 1342 | |
| 1343 | len -= max_bytes; |
| 1344 | offset += max_bytes; |
| 1345 | gfs2_inplace_release(ip); |
| 1346 | gfs2_quota_unlock(ip); |
| 1347 | } |
| 1348 | |
| 1349 | if (!(mode & FALLOC_FL_KEEP_SIZE) && (pos + count) > inode->i_size) |
| 1350 | i_size_write(inode, pos + count); |
| 1351 | file_update_time(file); |
| 1352 | mark_inode_dirty(inode); |
| 1353 | |
| 1354 | if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host)) |
| 1355 | return vfs_fsync_range(file, pos, pos + count - 1, |
| 1356 | (file->f_flags & __O_SYNC) ? 0 : 1); |
| 1357 | return 0; |
| 1358 | |
| 1359 | out_trans_fail: |
| 1360 | gfs2_inplace_release(ip); |
| 1361 | out_qunlock: |
| 1362 | gfs2_quota_unlock(ip); |
| 1363 | return error; |
| 1364 | } |
| 1365 | |
| 1366 | static long gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len) |
| 1367 | { |
| 1368 | struct inode *inode = file_inode(file); |
| 1369 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 1370 | struct gfs2_inode *ip = GFS2_I(inode); |
| 1371 | struct gfs2_holder gh; |
| 1372 | int ret; |
| 1373 | |
| 1374 | if (mode & ~(FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE)) |
| 1375 | return -EOPNOTSUPP; |
| 1376 | /* fallocate is needed by gfs2_grow to reserve space in the rindex */ |
| 1377 | if (gfs2_is_jdata(ip) && inode != sdp->sd_rindex) |
| 1378 | return -EOPNOTSUPP; |
| 1379 | |
| 1380 | inode_lock(inode); |
| 1381 | |
| 1382 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 1383 | ret = gfs2_glock_nq(&gh); |
| 1384 | if (ret) |
| 1385 | goto out_uninit; |
| 1386 | |
| 1387 | if (!(mode & FALLOC_FL_KEEP_SIZE) && |
| 1388 | (offset + len) > inode->i_size) { |
| 1389 | ret = inode_newsize_ok(inode, offset + len); |
| 1390 | if (ret) |
| 1391 | goto out_unlock; |
| 1392 | } |
| 1393 | |
| 1394 | ret = get_write_access(inode); |
| 1395 | if (ret) |
| 1396 | goto out_unlock; |
| 1397 | |
| 1398 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
| 1399 | ret = __gfs2_punch_hole(file, offset, len); |
| 1400 | } else { |
| 1401 | ret = __gfs2_fallocate(file, mode, offset, len); |
| 1402 | if (ret) |
| 1403 | gfs2_rs_deltree(&ip->i_res); |
| 1404 | } |
| 1405 | |
| 1406 | put_write_access(inode); |
| 1407 | out_unlock: |
| 1408 | gfs2_glock_dq(&gh); |
| 1409 | out_uninit: |
| 1410 | gfs2_holder_uninit(&gh); |
| 1411 | inode_unlock(inode); |
| 1412 | return ret; |
| 1413 | } |
| 1414 | |
| 1415 | static ssize_t gfs2_file_splice_write(struct pipe_inode_info *pipe, |
| 1416 | struct file *out, loff_t *ppos, |
| 1417 | size_t len, unsigned int flags) |
| 1418 | { |
| 1419 | ssize_t ret; |
| 1420 | |
| 1421 | gfs2_size_hint(out, *ppos, len); |
| 1422 | |
| 1423 | ret = iter_file_splice_write(pipe, out, ppos, len, flags); |
| 1424 | return ret; |
| 1425 | } |
| 1426 | |
| 1427 | #ifdef CONFIG_GFS2_FS_LOCKING_DLM |
| 1428 | |
| 1429 | /** |
| 1430 | * gfs2_lock - acquire/release a posix lock on a file |
| 1431 | * @file: the file pointer |
| 1432 | * @cmd: either modify or retrieve lock state, possibly wait |
| 1433 | * @fl: type and range of lock |
| 1434 | * |
| 1435 | * Returns: errno |
| 1436 | */ |
| 1437 | |
| 1438 | static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl) |
| 1439 | { |
| 1440 | struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); |
| 1441 | struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); |
| 1442 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
| 1443 | |
| 1444 | if (!(fl->c.flc_flags & FL_POSIX)) |
| 1445 | return -ENOLCK; |
| 1446 | if (gfs2_withdrawing_or_withdrawn(sdp)) { |
| 1447 | if (lock_is_unlock(fl)) |
| 1448 | locks_lock_file_wait(file, fl); |
| 1449 | return -EIO; |
| 1450 | } |
| 1451 | if (cmd == F_CANCELLK) |
| 1452 | return dlm_posix_cancel(ls->ls_dlm, ip->i_no_addr, file, fl); |
| 1453 | else if (IS_GETLK(cmd)) |
| 1454 | return dlm_posix_get(ls->ls_dlm, ip->i_no_addr, file, fl); |
| 1455 | else if (lock_is_unlock(fl)) |
| 1456 | return dlm_posix_unlock(ls->ls_dlm, ip->i_no_addr, file, fl); |
| 1457 | else |
| 1458 | return dlm_posix_lock(ls->ls_dlm, ip->i_no_addr, file, cmd, fl); |
| 1459 | } |
| 1460 | |
| 1461 | static void __flock_holder_uninit(struct file *file, struct gfs2_holder *fl_gh) |
| 1462 | { |
| 1463 | struct gfs2_glock *gl = gfs2_glock_hold(fl_gh->gh_gl); |
| 1464 | |
| 1465 | /* |
| 1466 | * Make sure gfs2_glock_put() won't sleep under the file->f_lock |
| 1467 | * spinlock. |
| 1468 | */ |
| 1469 | |
| 1470 | spin_lock(&file->f_lock); |
| 1471 | gfs2_holder_uninit(fl_gh); |
| 1472 | spin_unlock(&file->f_lock); |
| 1473 | gfs2_glock_put(gl); |
| 1474 | } |
| 1475 | |
| 1476 | static int do_flock(struct file *file, int cmd, struct file_lock *fl) |
| 1477 | { |
| 1478 | struct gfs2_file *fp = file->private_data; |
| 1479 | struct gfs2_holder *fl_gh = &fp->f_fl_gh; |
| 1480 | struct gfs2_inode *ip = GFS2_I(file_inode(file)); |
| 1481 | struct gfs2_glock *gl; |
| 1482 | unsigned int state; |
| 1483 | u16 flags; |
| 1484 | int error = 0; |
| 1485 | int sleeptime; |
| 1486 | |
| 1487 | state = lock_is_write(fl) ? LM_ST_EXCLUSIVE : LM_ST_SHARED; |
| 1488 | flags = GL_EXACT | GL_NOPID; |
| 1489 | if (!IS_SETLKW(cmd)) |
| 1490 | flags |= LM_FLAG_TRY_1CB; |
| 1491 | |
| 1492 | mutex_lock(&fp->f_fl_mutex); |
| 1493 | |
| 1494 | if (gfs2_holder_initialized(fl_gh)) { |
| 1495 | struct file_lock request; |
| 1496 | if (fl_gh->gh_state == state) |
| 1497 | goto out; |
| 1498 | locks_init_lock(&request); |
| 1499 | request.c.flc_type = F_UNLCK; |
| 1500 | request.c.flc_flags = FL_FLOCK; |
| 1501 | locks_lock_file_wait(file, &request); |
| 1502 | gfs2_glock_dq(fl_gh); |
| 1503 | gfs2_holder_reinit(state, flags, fl_gh); |
| 1504 | } else { |
| 1505 | error = gfs2_glock_get(GFS2_SB(&ip->i_inode), ip->i_no_addr, |
| 1506 | &gfs2_flock_glops, CREATE, &gl); |
| 1507 | if (error) |
| 1508 | goto out; |
| 1509 | spin_lock(&file->f_lock); |
| 1510 | gfs2_holder_init(gl, state, flags, fl_gh); |
| 1511 | spin_unlock(&file->f_lock); |
| 1512 | gfs2_glock_put(gl); |
| 1513 | } |
| 1514 | for (sleeptime = 1; sleeptime <= 4; sleeptime <<= 1) { |
| 1515 | error = gfs2_glock_nq(fl_gh); |
| 1516 | if (error != GLR_TRYFAILED) |
| 1517 | break; |
| 1518 | fl_gh->gh_flags &= ~LM_FLAG_TRY_1CB; |
| 1519 | fl_gh->gh_flags |= LM_FLAG_TRY; |
| 1520 | msleep(sleeptime); |
| 1521 | } |
| 1522 | if (error) { |
| 1523 | __flock_holder_uninit(file, fl_gh); |
| 1524 | if (error == GLR_TRYFAILED) |
| 1525 | error = -EAGAIN; |
| 1526 | } else { |
| 1527 | error = locks_lock_file_wait(file, fl); |
| 1528 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); |
| 1529 | } |
| 1530 | |
| 1531 | out: |
| 1532 | mutex_unlock(&fp->f_fl_mutex); |
| 1533 | return error; |
| 1534 | } |
| 1535 | |
| 1536 | static void do_unflock(struct file *file, struct file_lock *fl) |
| 1537 | { |
| 1538 | struct gfs2_file *fp = file->private_data; |
| 1539 | struct gfs2_holder *fl_gh = &fp->f_fl_gh; |
| 1540 | |
| 1541 | mutex_lock(&fp->f_fl_mutex); |
| 1542 | locks_lock_file_wait(file, fl); |
| 1543 | if (gfs2_holder_initialized(fl_gh)) { |
| 1544 | gfs2_glock_dq(fl_gh); |
| 1545 | __flock_holder_uninit(file, fl_gh); |
| 1546 | } |
| 1547 | mutex_unlock(&fp->f_fl_mutex); |
| 1548 | } |
| 1549 | |
| 1550 | /** |
| 1551 | * gfs2_flock - acquire/release a flock lock on a file |
| 1552 | * @file: the file pointer |
| 1553 | * @cmd: either modify or retrieve lock state, possibly wait |
| 1554 | * @fl: type and range of lock |
| 1555 | * |
| 1556 | * Returns: errno |
| 1557 | */ |
| 1558 | |
| 1559 | static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl) |
| 1560 | { |
| 1561 | if (!(fl->c.flc_flags & FL_FLOCK)) |
| 1562 | return -ENOLCK; |
| 1563 | |
| 1564 | if (lock_is_unlock(fl)) { |
| 1565 | do_unflock(file, fl); |
| 1566 | return 0; |
| 1567 | } else { |
| 1568 | return do_flock(file, cmd, fl); |
| 1569 | } |
| 1570 | } |
| 1571 | |
| 1572 | const struct file_operations gfs2_file_fops = { |
| 1573 | .llseek = gfs2_llseek, |
| 1574 | .read_iter = gfs2_file_read_iter, |
| 1575 | .write_iter = gfs2_file_write_iter, |
| 1576 | .iopoll = iocb_bio_iopoll, |
| 1577 | .unlocked_ioctl = gfs2_ioctl, |
| 1578 | .compat_ioctl = gfs2_compat_ioctl, |
| 1579 | .mmap = gfs2_mmap, |
| 1580 | .open = gfs2_open, |
| 1581 | .release = gfs2_release, |
| 1582 | .fsync = gfs2_fsync, |
| 1583 | .lock = gfs2_lock, |
| 1584 | .flock = gfs2_flock, |
| 1585 | .splice_read = copy_splice_read, |
| 1586 | .splice_write = gfs2_file_splice_write, |
| 1587 | .setlease = simple_nosetlease, |
| 1588 | .fallocate = gfs2_fallocate, |
| 1589 | }; |
| 1590 | |
| 1591 | const struct file_operations gfs2_dir_fops = { |
| 1592 | .iterate_shared = gfs2_readdir, |
| 1593 | .unlocked_ioctl = gfs2_ioctl, |
| 1594 | .compat_ioctl = gfs2_compat_ioctl, |
| 1595 | .open = gfs2_open, |
| 1596 | .release = gfs2_release, |
| 1597 | .fsync = gfs2_fsync, |
| 1598 | .lock = gfs2_lock, |
| 1599 | .flock = gfs2_flock, |
| 1600 | .llseek = default_llseek, |
| 1601 | }; |
| 1602 | |
| 1603 | #endif /* CONFIG_GFS2_FS_LOCKING_DLM */ |
| 1604 | |
| 1605 | const struct file_operations gfs2_file_fops_nolock = { |
| 1606 | .llseek = gfs2_llseek, |
| 1607 | .read_iter = gfs2_file_read_iter, |
| 1608 | .write_iter = gfs2_file_write_iter, |
| 1609 | .iopoll = iocb_bio_iopoll, |
| 1610 | .unlocked_ioctl = gfs2_ioctl, |
| 1611 | .compat_ioctl = gfs2_compat_ioctl, |
| 1612 | .mmap = gfs2_mmap, |
| 1613 | .open = gfs2_open, |
| 1614 | .release = gfs2_release, |
| 1615 | .fsync = gfs2_fsync, |
| 1616 | .splice_read = copy_splice_read, |
| 1617 | .splice_write = gfs2_file_splice_write, |
| 1618 | .setlease = generic_setlease, |
| 1619 | .fallocate = gfs2_fallocate, |
| 1620 | }; |
| 1621 | |
| 1622 | const struct file_operations gfs2_dir_fops_nolock = { |
| 1623 | .iterate_shared = gfs2_readdir, |
| 1624 | .unlocked_ioctl = gfs2_ioctl, |
| 1625 | .compat_ioctl = gfs2_compat_ioctl, |
| 1626 | .open = gfs2_open, |
| 1627 | .release = gfs2_release, |
| 1628 | .fsync = gfs2_fsync, |
| 1629 | .llseek = default_llseek, |
| 1630 | }; |
| 1631 | |