diff options
Diffstat (limited to 'fs/btrfs/file.c')
| -rw-r--r-- | fs/btrfs/file.c | 81 |
1 files changed, 45 insertions, 36 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index ea9f10bb089c..2234e88cf674 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1534,30 +1534,30 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file, reserve_bytes = round_up(write_bytes + sector_offset, root->sectorsize); - if ((BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW | - BTRFS_INODE_PREALLOC)) && - check_can_nocow(inode, pos, &write_bytes) > 0) { - /* - * For nodata cow case, no need to reserve - * data space. - */ - only_release_metadata = true; - /* - * our prealloc extent may be smaller than - * write_bytes, so scale down. - */ - num_pages = DIV_ROUND_UP(write_bytes + offset, - PAGE_SIZE); - reserve_bytes = round_up(write_bytes + sector_offset, - root->sectorsize); - goto reserve_metadata; - } - ret = btrfs_check_data_free_space(inode, pos, write_bytes); - if (ret < 0) - break; + if (ret < 0) { + if ((BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW | + BTRFS_INODE_PREALLOC)) && + check_can_nocow(inode, pos, &write_bytes) > 0) { + /* + * For nodata cow case, no need to reserve + * data space. + */ + only_release_metadata = true; + /* + * our prealloc extent may be smaller than + * write_bytes, so scale down. + */ + num_pages = DIV_ROUND_UP(write_bytes + offset, + PAGE_SIZE); + reserve_bytes = round_up(write_bytes + + sector_offset, + root->sectorsize); + } else { + break; + } + } -reserve_metadata: ret = btrfs_delalloc_reserve_metadata(inode, reserve_bytes); if (ret) { if (!only_release_metadata) @@ -1596,6 +1596,13 @@ again: copied = btrfs_copy_from_user(pos, write_bytes, pages, i); + num_sectors = BTRFS_BYTES_TO_BLKS(root->fs_info, + reserve_bytes); + dirty_sectors = round_up(copied + sector_offset, + root->sectorsize); + dirty_sectors = BTRFS_BYTES_TO_BLKS(root->fs_info, + dirty_sectors); + /* * if we have trouble faulting in the pages, fall * back to one page at a time @@ -1605,6 +1612,7 @@ again: if (copied == 0) { force_page_uptodate = true; + dirty_sectors = 0; dirty_pages = 0; } else { force_page_uptodate = false; @@ -1615,20 +1623,19 @@ again: /* * If we had a short copy we need to release the excess delaloc * bytes we reserved. We need to increment outstanding_extents - * because btrfs_delalloc_release_space will decrement it, but + * because btrfs_delalloc_release_space and + * btrfs_delalloc_release_metadata will decrement it, but * we still have an outstanding extent for the chunk we actually * managed to copy. */ - num_sectors = BTRFS_BYTES_TO_BLKS(root->fs_info, - reserve_bytes); - dirty_sectors = round_up(copied + sector_offset, - root->sectorsize); - dirty_sectors = BTRFS_BYTES_TO_BLKS(root->fs_info, - dirty_sectors); - if (num_sectors > dirty_sectors) { - release_bytes = (write_bytes - copied) - & ~((u64)root->sectorsize - 1); + /* + * we round down because we don't want to count + * any partial blocks actually sent through the + * IO machines + */ + release_bytes = round_down(release_bytes - copied, + root->sectorsize); if (copied > 0) { spin_lock(&BTRFS_I(inode)->lock); BTRFS_I(inode)->outstanding_extents++; @@ -1696,7 +1703,9 @@ again: btrfs_end_write_no_snapshoting(root); btrfs_delalloc_release_metadata(inode, release_bytes); } else { - btrfs_delalloc_release_space(inode, pos, release_bytes); + btrfs_delalloc_release_space(inode, + round_down(pos, root->sectorsize), + release_bytes); } } @@ -2020,7 +2029,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) BTRFS_I(inode)->last_trans <= root->fs_info->last_trans_committed)) { /* - * We'v had everything committed since the last time we were + * We've had everything committed since the last time we were * modified so clear this flag in case it was set for whatever * reason, it's no longer relevant. */ @@ -2368,7 +2377,7 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len) /* Check the aligned pages after the first unaligned page, * if offset != orig_start, which means the first unaligned page - * including serveral following pages are already in holes, + * including several following pages are already in holes, * the extra check can be skipped */ if (offset == orig_start) { /* after truncate page, check hole again */ @@ -2952,7 +2961,7 @@ const struct file_operations btrfs_file_operations = { .fallocate = btrfs_fallocate, .unlocked_ioctl = btrfs_ioctl, #ifdef CONFIG_COMPAT - .compat_ioctl = btrfs_ioctl, + .compat_ioctl = btrfs_compat_ioctl, #endif .copy_file_range = btrfs_copy_file_range, .clone_file_range = btrfs_clone_file_range, |