From c09544e07f8cdc455ed8615d4c067d694c33bd18 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Tue, 30 Aug 2011 10:19:10 -0400 Subject: Btrfs: handle enospc accounting for free space inodes Since free space inodes now use normal checksumming we need to make sure to account for their metadata use. So reserve metadata space, and then if we fail to write out the metadata we can just release it, otherwise it will be freed up when the io completes. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/extent-tree.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) (limited to 'fs/btrfs/extent-tree.c') diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 1f1d3e8..ccdc4d1 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2755,16 +2755,20 @@ again: num_pages *= 16; num_pages *= PAGE_CACHE_SIZE; - ret = btrfs_check_data_free_space(inode, num_pages); + ret = btrfs_delalloc_reserve_space(inode, num_pages); if (ret) goto out_put; ret = btrfs_prealloc_file_range_trans(inode, trans, 0, 0, num_pages, num_pages, num_pages, &alloc_hint); - if (!ret) + if (!ret) { dcs = BTRFS_DC_SETUP; - btrfs_free_reserved_data_space(inode, num_pages); + btrfs_free_reserved_data_space(inode, num_pages); + } else { + btrfs_delalloc_release_space(inode, num_pages); + } + out_put: iput(inode); out_free: @@ -4002,9 +4006,13 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes) struct btrfs_block_rsv *block_rsv = &root->fs_info->delalloc_block_rsv; u64 to_reserve = 0; unsigned nr_extents = 0; + int flush = 1; int ret; - if (btrfs_transaction_in_commit(root->fs_info)) + if (btrfs_is_free_space_inode(root, inode)) + flush = 0; + + if (flush && btrfs_transaction_in_commit(root->fs_info)) schedule_timeout(1); num_bytes = ALIGN(num_bytes, root->sectorsize); @@ -4023,7 +4031,7 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes) to_reserve += calc_csum_metadata_size(inode, num_bytes, 1); spin_unlock(&BTRFS_I(inode)->lock); - ret = reserve_metadata_bytes(NULL, root, block_rsv, to_reserve, 1); + ret = reserve_metadata_bytes(NULL, root, block_rsv, to_reserve, flush); if (ret) { u64 to_free = 0; unsigned dropped; -- cgit v1.1