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-rw-r--r--fs/ufs/truncate.c77
1 files changed, 25 insertions, 52 deletions
diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c
index c9b55872079b..ea11d04c41a0 100644
--- a/fs/ufs/truncate.c
+++ b/fs/ufs/truncate.c
@@ -375,17 +375,15 @@ static int ufs_alloc_lastblock(struct inode *inode)
375 int err = 0; 375 int err = 0;
376 struct address_space *mapping = inode->i_mapping; 376 struct address_space *mapping = inode->i_mapping;
377 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; 377 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
378 struct ufs_inode_info *ufsi = UFS_I(inode);
379 unsigned lastfrag, i, end; 378 unsigned lastfrag, i, end;
380 struct page *lastpage; 379 struct page *lastpage;
381 struct buffer_head *bh; 380 struct buffer_head *bh;
382 381
383 lastfrag = (i_size_read(inode) + uspi->s_fsize - 1) >> uspi->s_fshift; 382 lastfrag = (i_size_read(inode) + uspi->s_fsize - 1) >> uspi->s_fshift;
384 383
385 if (!lastfrag) { 384 if (!lastfrag)
386 ufsi->i_lastfrag = 0;
387 goto out; 385 goto out;
388 } 386
389 lastfrag--; 387 lastfrag--;
390 388
391 lastpage = ufs_get_locked_page(mapping, lastfrag >> 389 lastpage = ufs_get_locked_page(mapping, lastfrag >>
@@ -400,25 +398,25 @@ static int ufs_alloc_lastblock(struct inode *inode)
400 for (i = 0; i < end; ++i) 398 for (i = 0; i < end; ++i)
401 bh = bh->b_this_page; 399 bh = bh->b_this_page;
402 400
403 if (!buffer_mapped(bh)) { 401
404 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 402 err = ufs_getfrag_block(inode, lastfrag, bh, 1);
405 403
406 if (unlikely(err)) 404 if (unlikely(err))
407 goto out_unlock; 405 goto out_unlock;
408 406
409 if (buffer_new(bh)) { 407 if (buffer_new(bh)) {
410 clear_buffer_new(bh); 408 clear_buffer_new(bh);
411 unmap_underlying_metadata(bh->b_bdev, 409 unmap_underlying_metadata(bh->b_bdev,
412 bh->b_blocknr); 410 bh->b_blocknr);
413 /* 411 /*
414 * we do not zeroize fragment, because of 412 * we do not zeroize fragment, because of
415 * if it maped to hole, it already contains zeroes 413 * if it maped to hole, it already contains zeroes
416 */ 414 */
417 set_buffer_uptodate(bh); 415 set_buffer_uptodate(bh);
418 mark_buffer_dirty(bh); 416 mark_buffer_dirty(bh);
419 set_page_dirty(lastpage); 417 set_page_dirty(lastpage);
420 }
421 } 418 }
419
422out_unlock: 420out_unlock:
423 ufs_put_locked_page(lastpage); 421 ufs_put_locked_page(lastpage);
424out: 422out:
@@ -440,23 +438,11 @@ int ufs_truncate(struct inode *inode, loff_t old_i_size)
440 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 438 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
441 return -EPERM; 439 return -EPERM;
442 440
443 if (inode->i_size > old_i_size) { 441 err = ufs_alloc_lastblock(inode);
444 /*
445 * if we expand file we should care about
446 * allocation of block for last byte first of all
447 */
448 err = ufs_alloc_lastblock(inode);
449 442
450 if (err) { 443 if (err) {
451 i_size_write(inode, old_i_size); 444 i_size_write(inode, old_i_size);
452 goto out; 445 goto out;
453 }
454 /*
455 * go away, because of we expand file, and we do not
456 * need free blocks, and zeroizes page
457 */
458 lock_kernel();
459 goto almost_end;
460 } 446 }
461 447
462 block_truncate_page(inode->i_mapping, inode->i_size, ufs_getfrag_block); 448 block_truncate_page(inode->i_mapping, inode->i_size, ufs_getfrag_block);
@@ -477,21 +463,8 @@ int ufs_truncate(struct inode *inode, loff_t old_i_size)
477 yield(); 463 yield();
478 } 464 }
479 465
480 if (inode->i_size < old_i_size) {
481 /*
482 * now we should have enough space
483 * to allocate block for last byte
484 */
485 err = ufs_alloc_lastblock(inode);
486 if (err)
487 /*
488 * looks like all the same - we have no space,
489 * but we truncate file already
490 */
491 inode->i_size = (ufsi->i_lastfrag - 1) * uspi->s_fsize;
492 }
493almost_end:
494 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 466 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
467 ufsi->i_lastfrag = DIRECT_FRAGMENT;
495 unlock_kernel(); 468 unlock_kernel();
496 mark_inode_dirty(inode); 469 mark_inode_dirty(inode);
497out: 470out: