Btrfs: Off by one fixes in extent_map.c

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index a613792..c44989a 100644 (file)
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -2045,7 +2045,7 @@ struct extent_buffer *alloc_extent_buffer(struct extent_map_tree *tree,
        struct extent_buffer *eb;
        struct page *p;
        struct address_space *mapping = tree->mapping;
-       int uptodate = 0;
+       int uptodate = 1;
 
        eb = __alloc_extent_buffer(tree, start, len, mask);
        if (!eb || IS_ERR(eb))
@@ -2197,7 +2197,7 @@ int clear_extent_buffer_dirty(struct extent_map_tree *tree,
                 */
                if ((i == 0 && (eb->start & (PAGE_CACHE_SIZE - 1))) ||
                    ((i == num_pages - 1) &&
-                    ((eb->start + eb->len - 1) & (PAGE_CACHE_SIZE - 1)))) {
+                    ((eb->start + eb->len) & (PAGE_CACHE_SIZE - 1)))) {
                        start = page->index << PAGE_CACHE_SHIFT;
                        end  = start + PAGE_CACHE_SIZE - 1;
                        if (test_range_bit(tree, start, end,
@@ -2265,7 +2265,7 @@ int set_extent_buffer_uptodate(struct extent_map_tree *tree,
                page = extent_buffer_page(eb, i);
                if ((i == 0 && (eb->start & (PAGE_CACHE_SIZE - 1))) ||
                    ((i == num_pages - 1) &&
-                    ((eb->start + eb->len - 1) & (PAGE_CACHE_SIZE - 1)))) {
+                    ((eb->start + eb->len) & (PAGE_CACHE_SIZE - 1)))) {
                        check_page_uptodate(tree, page);
                        continue;
                }
@@ -2401,7 +2401,7 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
        struct page *p;
        size_t start_offset = eb->start & ((u64)PAGE_CACHE_SIZE - 1);
        unsigned long i = (start_offset + start) >> PAGE_CACHE_SHIFT;
-       unsigned long end_i = (start_offset + start + min_len) >>
+       unsigned long end_i = (start_offset + start + min_len - 1) >>
                PAGE_CACHE_SHIFT;
 
        if (i != end_i)
@@ -2414,7 +2414,7 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
                offset = 0;
                *map_start = (i << PAGE_CACHE_SHIFT) - start_offset;
        }
-       if (start + min_len >= eb->len) {
+       if (start + min_len > eb->len) {
 printk("bad mapping eb start %Lu len %lu, wanted %lu %lu\n", eb->start, eb->len, start, min_len);
                WARN_ON(1);
        }

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 7efc047..c074330 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -616,6 +616,7 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
                                break;
                        }
                        btrfs_set_key_type(&key, found_type);
+                       btrfs_release_path(root, path);
                        continue;
                }
                if (found_key.offset >= inode->i_size)