diff options
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ctree.h | 3 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 9 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 45 |
3 files changed, 46 insertions, 11 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 95944b8..6bf16d5 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3297,6 +3297,9 @@ static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) } /* extent-tree.c */ + +u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes); + static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, unsigned num_items) { diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a6f88eb..75f4bed 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2636,7 +2636,7 @@ static inline u64 heads_to_leaves(struct btrfs_root *root, u64 heads) * Takes the number of bytes to be csumm'ed and figures out how many leaves it * would require to store the csums for that many bytes. */ -static u64 csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes) +u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes) { u64 csum_size; u64 num_csums_per_leaf; @@ -2665,7 +2665,7 @@ int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, if (num_heads > 1) num_bytes += (num_heads - 1) * root->nodesize; num_bytes <<= 1; - num_bytes += csum_bytes_to_leaves(root, csum_bytes) * root->nodesize; + num_bytes += btrfs_csum_bytes_to_leaves(root, csum_bytes) * root->nodesize; global_rsv = &root->fs_info->global_block_rsv; /* @@ -5098,13 +5098,12 @@ static u64 calc_csum_metadata_size(struct inode *inode, u64 num_bytes, BTRFS_I(inode)->csum_bytes == 0) return 0; - old_csums = csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes); - + old_csums = btrfs_csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes); if (reserve) BTRFS_I(inode)->csum_bytes += num_bytes; else BTRFS_I(inode)->csum_bytes -= num_bytes; - num_csums = csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes); + num_csums = btrfs_csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes); /* No change, no need to reserve more */ if (old_csums == num_csums) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index cec23cf..88537c5 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4163,6 +4163,21 @@ out: return err; } +static int truncate_space_check(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + u64 bytes_deleted) +{ + int ret; + + bytes_deleted = btrfs_csum_bytes_to_leaves(root, bytes_deleted); + ret = btrfs_block_rsv_add(root, &root->fs_info->trans_block_rsv, + bytes_deleted, BTRFS_RESERVE_NO_FLUSH); + if (!ret) + trans->bytes_reserved += bytes_deleted; + return ret; + +} + /* * this can truncate away extent items, csum items and directory items. * It starts at a high offset and removes keys until it can't find @@ -4201,6 +4216,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, u64 bytes_deleted = 0; bool be_nice = 0; bool should_throttle = 0; + bool should_end = 0; BUG_ON(new_size > 0 && min_type != BTRFS_EXTENT_DATA_KEY); @@ -4396,6 +4412,8 @@ delete: } else { break; } + should_throttle = 0; + if (found_extent && (test_bit(BTRFS_ROOT_REF_COWS, &root->state) || root == root->fs_info->tree_root)) { @@ -4409,17 +4427,24 @@ delete: if (btrfs_should_throttle_delayed_refs(trans, root)) btrfs_async_run_delayed_refs(root, trans->delayed_ref_updates * 2, 0); + if (be_nice) { + if (truncate_space_check(trans, root, + extent_num_bytes)) { + should_end = 1; + } + if (btrfs_should_throttle_delayed_refs(trans, + root)) { + should_throttle = 1; + } + } } if (found_type == BTRFS_INODE_ITEM_KEY) break; - should_throttle = - btrfs_should_throttle_delayed_refs(trans, root); - if (path->slots[0] == 0 || path->slots[0] != pending_del_slot || - (be_nice && should_throttle)) { + should_throttle || should_end) { if (pending_del_nr) { ret = btrfs_del_items(trans, root, path, pending_del_slot, @@ -4432,7 +4457,7 @@ delete: pending_del_nr = 0; } btrfs_release_path(path); - if (be_nice && should_throttle) { + if (should_throttle) { unsigned long updates = trans->delayed_ref_updates; if (updates) { trans->delayed_ref_updates = 0; @@ -4441,6 +4466,14 @@ delete: err = ret; } } + /* + * if we failed to refill our space rsv, bail out + * and let the transaction restart + */ + if (should_end) { + err = -EAGAIN; + goto error; + } goto search_again; } else { path->slots[0]--; @@ -4460,7 +4493,7 @@ error: btrfs_free_path(path); - if (be_nice && btrfs_should_throttle_delayed_refs(trans, root)) { + if (be_nice && bytes_deleted > 32 * 1024 * 1024) { unsigned long updates = trans->delayed_ref_updates; if (updates) { trans->delayed_ref_updates = 0; |