diff options
| -rw-r--r-- | fs/ext4/extents.c | 119 |
1 files changed, 13 insertions, 106 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 4726a3a447a5..9ac89b671047 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3776,8 +3776,6 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, int free_on_err = 0, err = 0, depth, ret; unsigned int allocated = 0, offset = 0; unsigned int allocated_clusters = 0; - unsigned int punched_out = 0; - unsigned int result = 0; struct ext4_allocation_request ar; ext4_io_end_t *io = EXT4_I(inode)->cur_aio_dio; ext4_lblk_t cluster_offset; @@ -3787,8 +3785,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, trace_ext4_ext_map_blocks_enter(inode, map->m_lblk, map->m_len, flags); /* check in cache */ - if (!(flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) && - ext4_ext_in_cache(inode, map->m_lblk, &newex)) { + if (ext4_ext_in_cache(inode, map->m_lblk, &newex)) { if (!newex.ee_start_lo && !newex.ee_start_hi) { if ((sbi->s_cluster_ratio > 1) && ext4_find_delalloc_cluster(inode, map->m_lblk, 0)) @@ -3856,113 +3853,25 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, /* if found extent covers block, simply return it */ if (in_range(map->m_lblk, ee_block, ee_len)) { - struct ext4_map_blocks punch_map; - ext4_fsblk_t partial_cluster = 0; - newblock = map->m_lblk - ee_block + ee_start; /* number of remaining blocks in the extent */ allocated = ee_len - (map->m_lblk - ee_block); ext_debug("%u fit into %u:%d -> %llu\n", map->m_lblk, ee_block, ee_len, newblock); - if ((flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) == 0) { - /* - * Do not put uninitialized extent - * in the cache - */ - if (!ext4_ext_is_uninitialized(ex)) { - ext4_ext_put_in_cache(inode, ee_block, - ee_len, ee_start); - goto out; - } - ret = ext4_ext_handle_uninitialized_extents( - handle, inode, map, path, flags, - allocated, newblock); - return ret; - } - - /* - * Punch out the map length, but only to the - * end of the extent - */ - punched_out = allocated < map->m_len ? - allocated : map->m_len; - /* - * Sense extents need to be converted to - * uninitialized, they must fit in an - * uninitialized extent + * Do not put uninitialized extent + * in the cache */ - if (punched_out > EXT_UNINIT_MAX_LEN) - punched_out = EXT_UNINIT_MAX_LEN; - - punch_map.m_lblk = map->m_lblk; - punch_map.m_pblk = newblock; - punch_map.m_len = punched_out; - punch_map.m_flags = 0; - - /* Check to see if the extent needs to be split */ - if (punch_map.m_len != ee_len || - punch_map.m_lblk != ee_block) { - - ret = ext4_split_extent(handle, inode, - path, &punch_map, 0, - EXT4_GET_BLOCKS_PUNCH_OUT_EXT | - EXT4_GET_BLOCKS_PRE_IO); - - if (ret < 0) { - err = ret; - goto out2; - } - /* - * find extent for the block at - * the start of the hole - */ - ext4_ext_drop_refs(path); - kfree(path); - - path = ext4_ext_find_extent(inode, - map->m_lblk, NULL); - if (IS_ERR(path)) { - err = PTR_ERR(path); - path = NULL; - goto out2; - } - - depth = ext_depth(inode); - ex = path[depth].p_ext; - ee_len = ext4_ext_get_actual_len(ex); - ee_block = le32_to_cpu(ex->ee_block); - ee_start = ext4_ext_pblock(ex); - - } - - ext4_ext_mark_uninitialized(ex); - - ext4_ext_invalidate_cache(inode); - - err = ext4_ext_rm_leaf(handle, inode, path, - &partial_cluster, map->m_lblk, - map->m_lblk + punched_out); - - if (!err && path->p_hdr->eh_entries == 0) { - /* - * Punch hole freed all of this sub tree, - * so we need to correct eh_depth - */ - err = ext4_ext_get_access(handle, inode, path); - if (err == 0) { - ext_inode_hdr(inode)->eh_depth = 0; - ext_inode_hdr(inode)->eh_max = - cpu_to_le16(ext4_ext_space_root( - inode, 0)); - - err = ext4_ext_dirty( - handle, inode, path); - } + if (!ext4_ext_is_uninitialized(ex)) { + ext4_ext_put_in_cache(inode, ee_block, + ee_len, ee_start); + goto out; } - - goto out2; + ret = ext4_ext_handle_uninitialized_extents( + handle, inode, map, path, flags, + allocated, newblock); + return ret; } } @@ -4231,13 +4140,11 @@ out2: ext4_ext_drop_refs(path); kfree(path); } - result = (flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) ? - punched_out : allocated; trace_ext4_ext_map_blocks_exit(inode, map->m_lblk, - newblock, map->m_len, err ? err : result); + newblock, map->m_len, err ? err : allocated); - return err ? err : result; + return err ? err : allocated; } void ext4_ext_truncate(struct inode *inode) |