1 files changed, 30 insertions, 16 deletions

diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index a562a250ae77..90d4ee52cd45 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -48,7 +48,8 @@ int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
         struct extent_buffer *leaf;
 
         path = btrfs_alloc_path();
-        BUG_ON(!path);
+        if (!path)
+                return -ENOMEM;
         file_key.objectid = objectid;
         file_key.offset = pos;
         btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY);
@@ -169,6 +170,8 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
         struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
 
         path = btrfs_alloc_path();
+        if (!path)
+                return -ENOMEM;
         if (bio->bi_size > PAGE_CACHE_SIZE * 8)
                 path->reada = 2;
 
@@ -190,7 +193,7 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
                         u32 item_size;
 
                         if (item)
-                                btrfs_release_path(root, path);
+                                btrfs_release_path(path);
                         item = btrfs_lookup_csum(NULL, root->fs_info->csum_root,
                                                  path, disk_bytenr, 0);
                         if (IS_ERR(item)) {
@@ -205,12 +208,13 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
                                                 EXTENT_NODATASUM, GFP_NOFS);
                                 } else {
                                         printk(KERN_INFO "btrfs no csum found "
-                                               "for inode %lu start %llu\n",
-                                               inode->i_ino,
+                                               "for inode %llu start %llu\n",
+                                               (unsigned long long)
+                                               btrfs_ino(inode),
                                                (unsigned long long)offset);
                                 }
                                 item = NULL;
-                                btrfs_release_path(root, path);
+                                btrfs_release_path(path);
                                 goto found;
                         }
                         btrfs_item_key_to_cpu(path->nodes[0], &found_key,
@@ -263,7 +267,7 @@ int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
 }
 
 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
-                             struct list_head *list)
+                             struct list_head *list, int search_commit)
 {
         struct btrfs_key key;
         struct btrfs_path *path;
@@ -280,6 +284,12 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
         path = btrfs_alloc_path();
         BUG_ON(!path);
 
+        if (search_commit) {
+                path->skip_locking = 1;
+                path->reada = 2;
+                path->search_commit_root = 1;
+        }
+
         key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
         key.offset = start;
         key.type = BTRFS_EXTENT_CSUM_KEY;
@@ -492,7 +502,6 @@ static noinline int truncate_one_csum(struct btrfs_trans_handle *trans,
                 u32 new_size = (bytenr - key->offset) >> blocksize_bits;
                 new_size *= csum_size;
                 ret = btrfs_truncate_item(trans, root, path, new_size, 1);
-                BUG_ON(ret);
         } else if (key->offset >= bytenr && csum_end > end_byte &&
                    end_byte > key->offset) {
                 /*
@@ -505,7 +514,6 @@ static noinline int truncate_one_csum(struct btrfs_trans_handle *trans,
                 new_size *= csum_size;
 
                 ret = btrfs_truncate_item(trans, root, path, new_size, 0);
-                BUG_ON(ret);
 
                 key->offset = end_byte;
                 ret = btrfs_set_item_key_safe(trans, root, path, key);
@@ -536,6 +544,8 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
         root = root->fs_info->csum_root;
 
         path = btrfs_alloc_path();
+        if (!path)
+                return -ENOMEM;
 
         while (1) {
                 key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
@@ -546,9 +556,12 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
                 ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
                 if (ret > 0) {
                         if (path->slots[0] == 0)
-                                goto out;
+                                break;
                         path->slots[0]--;
+                } else if (ret < 0) {
+                        break;
                 }
+
                 leaf = path->nodes[0];
                 btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
 
@@ -571,7 +584,8 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
                 /* delete the entire item, it is inside our range */
                 if (key.offset >= bytenr && csum_end <= end_byte) {
                         ret = btrfs_del_item(trans, root, path);
-                        BUG_ON(ret);
+                        if (ret)
+                                goto out;
                         if (key.offset == bytenr)
                                 break;
                 } else if (key.offset < bytenr && csum_end > end_byte) {
@@ -623,11 +637,12 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
                         if (key.offset < bytenr)
                                 break;
                 }
-                btrfs_release_path(root, path);
+                btrfs_release_path(path);
         }
+        ret = 0;
 out:
         btrfs_free_path(path);
-        return 0;
+        return ret;
 }
 
 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
@@ -714,7 +729,7 @@ again:
          * at this point, we know the tree has an item, but it isn't big
          * enough yet to put our csum in.  Grow it
          */
-        btrfs_release_path(root, path);
+        btrfs_release_path(path);
         ret = btrfs_search_slot(trans, root, &file_key, path,
                                 csum_size, 1);
         if (ret < 0)
@@ -753,12 +768,11 @@ again:
                         goto insert;
 
                 ret = btrfs_extend_item(trans, root, path, diff);
-                BUG_ON(ret);
                 goto csum;
         }
 
 insert:
-        btrfs_release_path(root, path);
+        btrfs_release_path(path);
         csum_offset = 0;
         if (found_next) {
                 u64 tmp = total_bytes + root->sectorsize;
@@ -842,7 +856,7 @@ next_sector:
         }
         btrfs_mark_buffer_dirty(path->nodes[0]);
         if (total_bytes < sums->len) {
-                btrfs_release_path(root, path);
+                btrfs_release_path(path);
                 cond_resched();
                 goto again;
         }