ulfs_readwrite.c revision 1.20
1 /* $NetBSD: ulfs_readwrite.c,v 1.20 2015/11/23 08:00:45 mlelstv Exp $ */ 2 /* from NetBSD: ufs_readwrite.c,v 1.105 2013/01/22 09:39:18 dholland Exp */ 3 4 /*- 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)ufs_readwrite.c 8.11 (Berkeley) 5/8/95 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(1, "$NetBSD: ulfs_readwrite.c,v 1.20 2015/11/23 08:00:45 mlelstv Exp $"); 37 38 #ifdef LFS_READWRITE 39 #define FS struct lfs 40 #define I_FS i_lfs 41 #define READ lfs_read 42 #define READ_S "lfs_read" 43 #define WRITE lfs_write 44 #define WRITE_S "lfs_write" 45 #define BUFRD lfs_bufrd 46 #define BUFWR lfs_bufwr 47 #define fs_sb_getbsize(fs) lfs_sb_getbsize(fs) 48 #define fs_bmask lfs_bmask 49 #else 50 #define FS struct fs 51 #define I_FS i_fs 52 #define READ ffs_read 53 #define READ_S "ffs_read" 54 #define WRITE ffs_write 55 #define WRITE_S "ffs_write" 56 #define BUFRD ffs_bufrd 57 #define BUFWR ffs_bufwr 58 #define fs_sb_getbsize(fs) (fs)->fs_bsize 59 #endif 60 61 static int ulfs_post_read_update(struct vnode *, int, int); 62 static int ulfs_post_write_update(struct vnode *, struct uio *, int, 63 kauth_cred_t, off_t, int, int, int); 64 65 /* 66 * Vnode op for reading. 67 */ 68 /* ARGSUSED */ 69 int 70 READ(void *v) 71 { 72 struct vop_read_args /* { 73 struct vnode *a_vp; 74 struct uio *a_uio; 75 int a_ioflag; 76 kauth_cred_t a_cred; 77 } */ *ap = v; 78 struct vnode *vp; 79 struct inode *ip; 80 struct uio *uio; 81 FS *fs; 82 vsize_t bytelen; 83 int error, ioflag, advice; 84 85 vp = ap->a_vp; 86 ip = VTOI(vp); 87 fs = ip->I_FS; 88 uio = ap->a_uio; 89 ioflag = ap->a_ioflag; 90 error = 0; 91 92 KASSERT(uio->uio_rw == UIO_READ); 93 KASSERT(vp->v_type == VREG || vp->v_type == VDIR); 94 95 /* XXX Eliminate me by refusing directory reads from userland. */ 96 if (vp->v_type == VDIR) 97 return BUFRD(vp, uio, ioflag, ap->a_cred); 98 #ifdef LFS_READWRITE 99 /* XXX Eliminate me by using ufs_bufio in lfs. */ 100 if (vp->v_type == VREG && ip->i_number == LFS_IFILE_INUM) 101 return BUFRD(vp, uio, ioflag, ap->a_cred); 102 #endif 103 if ((u_int64_t)uio->uio_offset > fs->um_maxfilesize) 104 return (EFBIG); 105 if (uio->uio_resid == 0) 106 return (0); 107 108 #ifndef LFS_READWRITE 109 if ((ip->i_flags & (SF_SNAPSHOT | SF_SNAPINVAL)) == SF_SNAPSHOT) 110 return ffs_snapshot_read(vp, uio, ioflag); 111 #endif /* !LFS_READWRITE */ 112 113 fstrans_start(vp->v_mount, FSTRANS_SHARED); 114 115 if (uio->uio_offset >= ip->i_size) 116 goto out; 117 118 KASSERT(vp->v_type == VREG); 119 advice = IO_ADV_DECODE(ap->a_ioflag); 120 while (uio->uio_resid > 0) { 121 if (ioflag & IO_DIRECT) { 122 genfs_directio(vp, uio, ioflag); 123 } 124 bytelen = MIN(ip->i_size - uio->uio_offset, uio->uio_resid); 125 if (bytelen == 0) 126 break; 127 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 128 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 129 if (error) 130 break; 131 } 132 133 out: 134 error = ulfs_post_read_update(vp, ap->a_ioflag, error); 135 fstrans_done(vp->v_mount); 136 return (error); 137 } 138 139 /* 140 * UFS op for reading via the buffer cache 141 */ 142 int 143 BUFRD(struct vnode *vp, struct uio *uio, int ioflag, kauth_cred_t cred) 144 { 145 struct inode *ip; 146 FS *fs; 147 struct buf *bp; 148 daddr_t lbn, nextlbn; 149 off_t bytesinfile; 150 long size, xfersize, blkoffset; 151 int error; 152 153 KASSERT(VOP_ISLOCKED(vp)); 154 KASSERT(vp->v_type == VDIR || vp->v_type == VLNK || 155 vp->v_type == VREG); 156 KASSERT(uio->uio_rw == UIO_READ); 157 158 ip = VTOI(vp); 159 fs = ip->I_FS; 160 error = 0; 161 162 KASSERT(vp->v_type != VLNK || ip->i_size >= fs->um_maxsymlinklen); 163 KASSERT(vp->v_type != VLNK || fs->um_maxsymlinklen != 0 || 164 DIP(ip, blocks) == 0); 165 KASSERT(vp->v_type != VREG || vp == fs->lfs_ivnode); 166 KASSERT(vp->v_type != VREG || ip->i_number == LFS_IFILE_INUM); 167 168 if (uio->uio_offset > fs->um_maxfilesize) 169 return EFBIG; 170 if (uio->uio_resid == 0) 171 return 0; 172 173 #ifndef LFS_READWRITE 174 KASSERT(!ISSET(ip->i_flags, (SF_SNAPSHOT | SF_SNAPINVAL))); 175 #endif 176 177 fstrans_start(vp->v_mount, FSTRANS_SHARED); 178 179 if (uio->uio_offset >= ip->i_size) 180 goto out; 181 182 for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) { 183 bytesinfile = ip->i_size - uio->uio_offset; 184 if (bytesinfile <= 0) 185 break; 186 lbn = lfs_lblkno(fs, uio->uio_offset); 187 nextlbn = lbn + 1; 188 size = lfs_blksize(fs, ip, lbn); 189 blkoffset = lfs_blkoff(fs, uio->uio_offset); 190 xfersize = MIN(MIN(fs_sb_getbsize(fs) - blkoffset, uio->uio_resid), 191 bytesinfile); 192 193 if (lfs_lblktosize(fs, nextlbn) >= ip->i_size) 194 error = bread(vp, lbn, size, 0, &bp); 195 else { 196 int nextsize = lfs_blksize(fs, ip, nextlbn); 197 error = breadn(vp, lbn, 198 size, &nextlbn, &nextsize, 1, 0, &bp); 199 } 200 if (error) 201 break; 202 203 /* 204 * We should only get non-zero b_resid when an I/O error 205 * has occurred, which should cause us to break above. 206 * However, if the short read did not cause an error, 207 * then we want to ensure that we do not uiomove bad 208 * or uninitialized data. 209 */ 210 size -= bp->b_resid; 211 if (size < xfersize) { 212 if (size == 0) 213 break; 214 xfersize = size; 215 } 216 error = uiomove((char *)bp->b_data + blkoffset, xfersize, uio); 217 if (error) 218 break; 219 brelse(bp, 0); 220 } 221 if (bp != NULL) 222 brelse(bp, 0); 223 224 out: 225 error = ulfs_post_read_update(vp, ioflag, error); 226 fstrans_done(vp->v_mount); 227 return (error); 228 } 229 230 static int 231 ulfs_post_read_update(struct vnode *vp, int ioflag, int oerror) 232 { 233 struct inode *ip = VTOI(vp); 234 int error = oerror; 235 236 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 237 ip->i_flag |= IN_ACCESS; 238 if ((ioflag & IO_SYNC) == IO_SYNC) { 239 error = lfs_update(vp, NULL, NULL, UPDATE_WAIT); 240 } 241 } 242 243 /* Read error overrides any inode update error. */ 244 if (oerror) 245 error = oerror; 246 return error; 247 } 248 249 /* 250 * Vnode op for writing. 251 */ 252 int 253 WRITE(void *v) 254 { 255 struct vop_write_args /* { 256 struct vnode *a_vp; 257 struct uio *a_uio; 258 int a_ioflag; 259 kauth_cred_t a_cred; 260 } */ *ap = v; 261 struct vnode *vp; 262 struct uio *uio; 263 struct inode *ip; 264 FS *fs; 265 kauth_cred_t cred; 266 off_t osize, origoff, oldoff, preallocoff, endallocoff, nsize; 267 int blkoffset, error, flags, ioflag, resid; 268 int aflag; 269 int extended=0; 270 vsize_t bytelen; 271 bool async; 272 273 cred = ap->a_cred; 274 ioflag = ap->a_ioflag; 275 uio = ap->a_uio; 276 vp = ap->a_vp; 277 ip = VTOI(vp); 278 279 KASSERT(vp->v_size == ip->i_size); 280 KASSERT(uio->uio_rw == UIO_WRITE); 281 KASSERT(vp->v_type == VREG); 282 283 if (ioflag & IO_APPEND) 284 uio->uio_offset = ip->i_size; 285 if ((ip->i_flags & APPEND) && uio->uio_offset != ip->i_size) 286 return (EPERM); 287 288 fs = ip->I_FS; 289 if (uio->uio_offset < 0 || 290 (u_int64_t)uio->uio_offset + uio->uio_resid > fs->um_maxfilesize) 291 return (EFBIG); 292 #ifdef LFS_READWRITE 293 /* Disallow writes to the Ifile, even if noschg flag is removed */ 294 /* XXX can this go away when the Ifile is no longer in the namespace? */ 295 if (vp == fs->lfs_ivnode) 296 return (EPERM); 297 #endif 298 if (uio->uio_resid == 0) 299 return (0); 300 301 fstrans_start(vp->v_mount, FSTRANS_SHARED); 302 303 flags = ioflag & IO_SYNC ? B_SYNC : 0; 304 async = vp->v_mount->mnt_flag & MNT_ASYNC; 305 origoff = uio->uio_offset; 306 resid = uio->uio_resid; 307 osize = ip->i_size; 308 error = 0; 309 310 KASSERT(vp->v_type == VREG); 311 312 #ifdef LFS_READWRITE 313 async = true; 314 lfs_availwait(fs, lfs_btofsb(fs, uio->uio_resid)); 315 lfs_check(vp, LFS_UNUSED_LBN, 0); 316 #endif /* !LFS_READWRITE */ 317 318 preallocoff = round_page(lfs_blkroundup(fs, MAX(osize, uio->uio_offset))); 319 aflag = ioflag & IO_SYNC ? B_SYNC : 0; 320 nsize = MAX(osize, uio->uio_offset + uio->uio_resid); 321 endallocoff = nsize - lfs_blkoff(fs, nsize); 322 323 /* 324 * if we're increasing the file size, deal with expanding 325 * the fragment if there is one. 326 */ 327 328 if (nsize > osize && lfs_lblkno(fs, osize) < ULFS_NDADDR && 329 lfs_lblkno(fs, osize) != lfs_lblkno(fs, nsize) && 330 lfs_blkroundup(fs, osize) != osize) { 331 off_t eob; 332 333 eob = lfs_blkroundup(fs, osize); 334 uvm_vnp_setwritesize(vp, eob); 335 error = ulfs_balloc_range(vp, osize, eob - osize, cred, aflag); 336 if (error) 337 goto out; 338 if (flags & B_SYNC) { 339 mutex_enter(vp->v_interlock); 340 VOP_PUTPAGES(vp, trunc_page(osize & lfs_sb_getbmask(fs)), 341 round_page(eob), 342 PGO_CLEANIT | PGO_SYNCIO); 343 } 344 } 345 346 while (uio->uio_resid > 0) { 347 int ubc_flags = UBC_WRITE; 348 bool overwrite; /* if we're overwrite a whole block */ 349 off_t newoff; 350 351 if (ioflag & IO_DIRECT) { 352 genfs_directio(vp, uio, ioflag); 353 } 354 355 oldoff = uio->uio_offset; 356 blkoffset = lfs_blkoff(fs, uio->uio_offset); 357 bytelen = MIN(fs_sb_getbsize(fs) - blkoffset, uio->uio_resid); 358 if (bytelen == 0) { 359 break; 360 } 361 362 /* 363 * if we're filling in a hole, allocate the blocks now and 364 * initialize the pages first. if we're extending the file, 365 * we can safely allocate blocks without initializing pages 366 * since the new blocks will be inaccessible until the write 367 * is complete. 368 */ 369 overwrite = uio->uio_offset >= preallocoff && 370 uio->uio_offset < endallocoff; 371 if (!overwrite && (vp->v_vflag & VV_MAPPED) == 0 && 372 lfs_blkoff(fs, uio->uio_offset) == 0 && 373 (uio->uio_offset & PAGE_MASK) == 0) { 374 vsize_t len; 375 376 len = trunc_page(bytelen); 377 len -= lfs_blkoff(fs, len); 378 if (len > 0) { 379 overwrite = true; 380 bytelen = len; 381 } 382 } 383 384 newoff = oldoff + bytelen; 385 if (vp->v_size < newoff) { 386 uvm_vnp_setwritesize(vp, newoff); 387 } 388 389 if (!overwrite) { 390 error = ulfs_balloc_range(vp, uio->uio_offset, bytelen, 391 cred, aflag); 392 if (error) 393 break; 394 } else { 395 genfs_node_wrlock(vp); 396 error = GOP_ALLOC(vp, uio->uio_offset, bytelen, 397 aflag, cred); 398 genfs_node_unlock(vp); 399 if (error) 400 break; 401 ubc_flags |= UBC_FAULTBUSY; 402 } 403 404 /* 405 * copy the data. 406 */ 407 408 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 409 IO_ADV_DECODE(ioflag), ubc_flags | UBC_UNMAP_FLAG(vp)); 410 411 /* 412 * update UVM's notion of the size now that we've 413 * copied the data into the vnode's pages. 414 * 415 * we should update the size even when uiomove failed. 416 */ 417 418 if (vp->v_size < newoff) { 419 uvm_vnp_setsize(vp, newoff); 420 extended = 1; 421 } 422 423 if (error) 424 break; 425 426 /* 427 * flush what we just wrote if necessary. 428 * XXXUBC simplistic async flushing. 429 */ 430 431 #ifndef LFS_READWRITE 432 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 433 mutex_enter(vp->v_interlock); 434 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 435 (uio->uio_offset >> 16) << 16, 436 PGO_CLEANIT | PGO_LAZY); 437 if (error) 438 break; 439 } 440 #else 441 __USE(async); 442 #endif 443 } 444 if (error == 0 && ioflag & IO_SYNC) { 445 mutex_enter(vp->v_interlock); 446 error = VOP_PUTPAGES(vp, trunc_page(origoff & lfs_sb_getbmask(fs)), 447 round_page(lfs_blkroundup(fs, uio->uio_offset)), 448 PGO_CLEANIT | PGO_SYNCIO); 449 } 450 451 out: 452 error = ulfs_post_write_update(vp, uio, ioflag, cred, osize, resid, 453 extended, error); 454 fstrans_done(vp->v_mount); 455 456 return (error); 457 } 458 459 /* 460 * UFS op for writing via the buffer cache 461 */ 462 int 463 BUFWR(struct vnode *vp, struct uio *uio, int ioflag, kauth_cred_t cred) 464 { 465 struct inode *ip; 466 FS *fs; 467 int flags; 468 struct buf *bp; 469 off_t osize; 470 int resid, xfersize, size, blkoffset; 471 daddr_t lbn; 472 int extended=0; 473 int error; 474 #ifdef LFS_READWRITE 475 bool need_unreserve = false; 476 #endif 477 478 KASSERT(ISSET(ioflag, IO_NODELOCKED)); 479 KASSERT(VOP_ISLOCKED(vp) == LK_EXCLUSIVE); 480 KASSERT(vp->v_type == VDIR || vp->v_type == VLNK); 481 KASSERT(vp->v_type != VDIR || ISSET(ioflag, IO_SYNC)); 482 KASSERT(uio->uio_rw == UIO_WRITE); 483 484 ip = VTOI(vp); 485 fs = ip->I_FS; 486 487 KASSERT(vp->v_size == ip->i_size); 488 489 if (uio->uio_offset < 0 || 490 uio->uio_resid > fs->um_maxfilesize || 491 uio->uio_offset > (fs->um_maxfilesize - uio->uio_resid)) 492 return EFBIG; 493 #ifdef LFS_READWRITE 494 KASSERT(vp != fs->lfs_ivnode); 495 #endif 496 if (uio->uio_resid == 0) 497 return 0; 498 499 fstrans_start(vp->v_mount, FSTRANS_SHARED); 500 501 flags = ioflag & IO_SYNC ? B_SYNC : 0; 502 resid = uio->uio_resid; 503 osize = ip->i_size; 504 error = 0; 505 506 KASSERT(vp->v_type != VREG); 507 508 #ifdef LFS_READWRITE 509 lfs_availwait(fs, lfs_btofsb(fs, uio->uio_resid)); 510 lfs_check(vp, LFS_UNUSED_LBN, 0); 511 #endif /* !LFS_READWRITE */ 512 513 /* XXX Should never have pages cached here. */ 514 KASSERT(vp->v_uobj.uo_npages == 0); 515 while (uio->uio_resid > 0) { 516 lbn = lfs_lblkno(fs, uio->uio_offset); 517 blkoffset = lfs_blkoff(fs, uio->uio_offset); 518 xfersize = MIN(fs_sb_getbsize(fs) - blkoffset, uio->uio_resid); 519 if (fs_sb_getbsize(fs) > xfersize) 520 flags |= B_CLRBUF; 521 else 522 flags &= ~B_CLRBUF; 523 524 #ifdef LFS_READWRITE 525 error = lfs_reserve(fs, vp, NULL, 526 lfs_btofsb(fs, (ULFS_NIADDR + 1) << lfs_sb_getbshift(fs))); 527 if (error) 528 break; 529 need_unreserve = true; 530 #endif 531 error = lfs_balloc(vp, uio->uio_offset, xfersize, cred, flags, 532 &bp); 533 534 if (error) 535 break; 536 if (uio->uio_offset + xfersize > ip->i_size) { 537 ip->i_size = uio->uio_offset + xfersize; 538 DIP_ASSIGN(ip, size, ip->i_size); 539 uvm_vnp_setsize(vp, ip->i_size); 540 extended = 1; 541 } 542 size = lfs_blksize(fs, ip, lbn) - bp->b_resid; 543 if (xfersize > size) 544 xfersize = size; 545 546 error = uiomove((char *)bp->b_data + blkoffset, xfersize, uio); 547 548 /* 549 * if we didn't clear the block and the uiomove failed, 550 * the buf will now contain part of some other file, 551 * so we need to invalidate it. 552 */ 553 if (error && (flags & B_CLRBUF) == 0) { 554 brelse(bp, BC_INVAL); 555 break; 556 } 557 #ifdef LFS_READWRITE 558 (void)VOP_BWRITE(bp->b_vp, bp); 559 lfs_reserve(fs, vp, NULL, 560 -lfs_btofsb(fs, (ULFS_NIADDR + 1) << lfs_sb_getbshift(fs))); 561 need_unreserve = false; 562 #else 563 if (ioflag & IO_SYNC) 564 (void)bwrite(bp); 565 else if (xfersize + blkoffset == fs->fs_bsize) 566 bawrite(bp); 567 else 568 bdwrite(bp); 569 #endif 570 if (error || xfersize == 0) 571 break; 572 } 573 #ifdef LFS_READWRITE 574 if (need_unreserve) { 575 lfs_reserve(fs, vp, NULL, 576 -lfs_btofsb(fs, (ULFS_NIADDR + 1) << lfs_sb_getbshift(fs))); 577 } 578 #endif 579 580 error = ulfs_post_write_update(vp, uio, ioflag, cred, osize, resid, 581 extended, error); 582 fstrans_done(vp->v_mount); 583 584 return (error); 585 } 586 587 static int 588 ulfs_post_write_update(struct vnode *vp, struct uio *uio, int ioflag, 589 kauth_cred_t cred, off_t osize, int resid, int extended, int oerror) 590 { 591 struct inode *ip = VTOI(vp); 592 int error = oerror; 593 594 /* Trigger ctime and mtime updates, and atime if MNT_RELATIME. */ 595 ip->i_flag |= IN_CHANGE | IN_UPDATE; 596 if (vp->v_mount->mnt_flag & MNT_RELATIME) 597 ip->i_flag |= IN_ACCESS; 598 599 /* 600 * If we successfully wrote any data and we are not the superuser, 601 * we clear the setuid and setgid bits as a precaution against 602 * tampering. 603 */ 604 if (resid > uio->uio_resid && cred) { 605 if (ip->i_mode & ISUID) { 606 if (kauth_authorize_vnode(cred, 607 KAUTH_VNODE_RETAIN_SUID, vp, NULL, EPERM) != 0) { 608 ip->i_mode &= ~ISUID; 609 DIP_ASSIGN(ip, mode, ip->i_mode); 610 } 611 } 612 613 if (ip->i_mode & ISGID) { 614 if (kauth_authorize_vnode(cred, 615 KAUTH_VNODE_RETAIN_SGID, vp, NULL, EPERM) != 0) { 616 ip->i_mode &= ~ISGID; 617 DIP_ASSIGN(ip, mode, ip->i_mode); 618 } 619 } 620 } 621 622 /* If we successfully wrote anything, notify kevent listeners. */ 623 if (resid > uio->uio_resid) 624 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 625 626 /* 627 * Update the size on disk: truncate back to original size on 628 * error, or reflect the new size on success. 629 */ 630 if (error) { 631 (void) lfs_truncate(vp, osize, ioflag & IO_SYNC, cred); 632 uio->uio_offset -= resid - uio->uio_resid; 633 uio->uio_resid = resid; 634 } else if (resid > uio->uio_resid && (ioflag & IO_SYNC) == IO_SYNC) { 635 error = lfs_update(vp, NULL, NULL, UPDATE_WAIT); 636 } else { 637 /* nothing */ 638 } 639 640 /* Make sure the vnode uvm size matches the inode file size. */ 641 KASSERT(vp->v_size == ip->i_size); 642 643 /* Write error overrides any inode update error. */ 644 if (oerror) 645 error = oerror; 646 return error; 647 } 648
Indexes created Tue Sep 30 20:09:53 GMT 2025