Btrfs: release space on error in page_mkwrite

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / inode.c

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 0a6b928813a41f4ca3176cf2e0a228d166492bab..85fd86ea98308c3322ead1267b600433607946df 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2845,7 +2845,7 @@ static void __unlink_end_trans(struct btrfs_trans_handle *trans,
                BUG_ON(!root->fs_info->enospc_unlink);
                root->fs_info->enospc_unlink = 0;
        }
-       btrfs_end_transaction_throttle(trans, root);
+       btrfs_end_transaction(trans, root);
 }
 
 static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
@@ -3009,7 +3009,6 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
        int pending_del_nr = 0;
        int pending_del_slot = 0;
        int extent_type = -1;
-       int encoding;
        int ret;
        int err = 0;
        u64 ino = btrfs_ino(inode);
@@ -3059,7 +3058,6 @@ search_again:
                leaf = path->nodes[0];
                btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
                found_type = btrfs_key_type(&found_key);
-               encoding = 0;
 
                if (found_key.objectid != ino)
                        break;
@@ -3072,10 +3070,6 @@ search_again:
                        fi = btrfs_item_ptr(leaf, path->slots[0],
                                            struct btrfs_file_extent_item);
                        extent_type = btrfs_file_extent_type(leaf, fi);
-                       encoding = btrfs_file_extent_compression(leaf, fi);
-                       encoding |= btrfs_file_extent_encryption(leaf, fi);
-                       encoding |= btrfs_file_extent_other_encoding(leaf, fi);
-
                        if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
                                item_end +=
                                    btrfs_file_extent_num_bytes(leaf, fi);
@@ -3103,7 +3097,7 @@ search_again:
                if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
                        u64 num_dec;
                        extent_start = btrfs_file_extent_disk_bytenr(leaf, fi);
-                       if (!del_item && !encoding) {
+                       if (!del_item) {
                                u64 orig_num_bytes =
                                        btrfs_file_extent_num_bytes(leaf, fi);
                                extent_num_bytes = new_size -
@@ -3179,7 +3173,7 @@ delete:
                        ret = btrfs_free_extent(trans, root, extent_start,
                                                extent_num_bytes, 0,
                                                btrfs_header_owner(leaf),
-                                               ino, extent_offset);
+                                               ino, extent_offset, 0);
                        BUG_ON(ret);
                }
 
@@ -3434,7 +3428,7 @@ static int btrfs_setsize(struct inode *inode, loff_t newsize)
                i_size_write(inode, newsize);
                btrfs_ordered_update_i_size(inode, i_size_read(inode), NULL);
                ret = btrfs_update_inode(trans, root, inode);
-               btrfs_end_transaction_throttle(trans, root);
+               btrfs_end_transaction(trans, root);
        } else {
 
                /*
@@ -4590,10 +4584,6 @@ static int btrfs_add_nondir(struct btrfs_trans_handle *trans,
        int err = btrfs_add_link(trans, dir, inode,
                                 dentry->d_name.name, dentry->d_name.len,
                                 backref, index);
-       if (!err) {
-               d_instantiate(dentry, inode);
-               return 0;
-       }
        if (err > 0)
                err = -EEXIST;
        return err;
@@ -4655,10 +4645,11 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
        else {
                init_special_inode(inode, inode->i_mode, rdev);
                btrfs_update_inode(trans, root, inode);
+               d_instantiate(dentry, inode);
        }
 out_unlock:
        nr = trans->blocks_used;
-       btrfs_end_transaction_throttle(trans, root);
+       btrfs_end_transaction(trans, root);
        btrfs_btree_balance_dirty(root, nr);
        if (drop_inode) {
                inode_dec_link_count(inode);
@@ -4722,10 +4713,11 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
                inode->i_mapping->a_ops = &btrfs_aops;
                inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
                BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
+               d_instantiate(dentry, inode);
        }
 out_unlock:
        nr = trans->blocks_used;
-       btrfs_end_transaction_throttle(trans, root);
+       btrfs_end_transaction(trans, root);
        if (drop_inode) {
                inode_dec_link_count(inode);
                iput(inode);
@@ -4779,11 +4771,12 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
                struct dentry *parent = dentry->d_parent;
                err = btrfs_update_inode(trans, root, inode);
                BUG_ON(err);
+               d_instantiate(dentry, inode);
                btrfs_log_new_name(trans, inode, NULL, parent);
        }
 
        nr = trans->blocks_used;
-       btrfs_end_transaction_throttle(trans, root);
+       btrfs_end_transaction(trans, root);
 fail:
        if (drop_inode) {
                inode_dec_link_count(inode);
@@ -4849,7 +4842,7 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 
 out_fail:
        nr = trans->blocks_used;
-       btrfs_end_transaction_throttle(trans, root);
+       btrfs_end_transaction(trans, root);
        if (drop_on_err)
                iput(inode);
        btrfs_btree_balance_dirty(root, nr);
@@ -5122,7 +5115,7 @@ again:
                        }
                        flush_dcache_page(page);
                } else if (create && PageUptodate(page)) {
-                       WARN_ON(1);
+                       BUG();
                        if (!trans) {
                                kunmap(page);
                                free_extent_map(em);
@@ -6495,8 +6488,8 @@ out_unlock:
        if (!ret)
                return VM_FAULT_LOCKED;
        unlock_page(page);
-       btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
 out:
+       btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
        return ret;
 }
 
@@ -6669,7 +6662,7 @@ end_trans:
                        err = ret;
 
                nr = trans->blocks_used;
-               ret = btrfs_end_transaction_throttle(trans, root);
+               ret = btrfs_end_transaction(trans, root);
                btrfs_btree_balance_dirty(root, nr);
        }
 
@@ -7076,7 +7069,7 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                btrfs_end_log_trans(root);
        }
 out_fail:
-       btrfs_end_transaction_throttle(trans, root);
+       btrfs_end_transaction(trans, root);
 out_notrans:
        if (old_ino == BTRFS_FIRST_FREE_OBJECTID)
                up_read(&root->fs_info->subvol_sem);
@@ -7245,8 +7238,10 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
                drop_inode = 1;
 
 out_unlock:
+       if (!err)
+               d_instantiate(dentry, inode);
        nr = trans->blocks_used;
-       btrfs_end_transaction_throttle(trans, root);
+       btrfs_end_transaction(trans, root);
        if (drop_inode) {
                inode_dec_link_count(inode);
                iput(inode);