diff options
Diffstat (limited to 'fs/ext4/extents.c')
-rw-r--r-- | fs/ext4/extents.c | 315 |
1 files changed, 298 insertions, 17 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index a0481582187a..559100f3e23c 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -501,7 +501,7 @@ __read_extent_tree_block(const char *function, unsigned int line, if (!bh_uptodate_or_lock(bh)) { trace_ext4_ext_load_extent(inode, pblk, _RET_IP_); - err = bh_submit_read(bh); + err = ext4_read_bh(bh, 0, NULL); if (err < 0) goto errout; } @@ -3723,6 +3723,7 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle, err = ext4_ext_dirty(handle, inode, path + path->p_depth); out: ext4_ext_show_leaf(inode, path); + ext4_fc_track_range(inode, ee_block, ee_block + ee_len - 1); return err; } @@ -3794,6 +3795,7 @@ convert_initialized_extent(handle_t *handle, struct inode *inode, if (*allocated > map->m_len) *allocated = map->m_len; map->m_len = *allocated; + ext4_fc_track_range(inode, ee_block, ee_block + ee_len - 1); return 0; } @@ -4023,7 +4025,7 @@ static int get_implied_cluster_alloc(struct super_block *sb, * down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block * (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem) * - * return > 0, number of of blocks already mapped/allocated + * return > 0, number of blocks already mapped/allocated * if create == 0 and these are pre-allocated blocks * buffer head is unmapped * otherwise blocks are mapped @@ -4327,7 +4329,7 @@ got_allocated_blocks: map->m_len = ar.len; allocated = map->m_len; ext4_ext_show_leaf(inode, path); - + ext4_fc_track_range(inode, map->m_lblk, map->m_lblk + map->m_len - 1); out: ext4_ext_drop_refs(path); kfree(path); @@ -4600,7 +4602,8 @@ static long ext4_zero_range(struct file *file, loff_t offset, ret = ext4_mark_inode_dirty(handle, inode); if (unlikely(ret)) goto out_handle; - + ext4_fc_track_range(inode, offset >> inode->i_sb->s_blocksize_bits, + (offset + len - 1) >> inode->i_sb->s_blocksize_bits); /* Zero out partial block at the edges of the range */ ret = ext4_zero_partial_blocks(handle, inode, offset, len); if (ret >= 0) @@ -4648,23 +4651,34 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len) FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE)) return -EOPNOTSUPP; + ext4_fc_track_range(inode, offset >> blkbits, + (offset + len - 1) >> blkbits); - if (mode & FALLOC_FL_PUNCH_HOLE) - return ext4_punch_hole(inode, offset, len); + ext4_fc_start_update(inode); + + if (mode & FALLOC_FL_PUNCH_HOLE) { + ret = ext4_punch_hole(inode, offset, len); + goto exit; + } ret = ext4_convert_inline_data(inode); if (ret) - return ret; + goto exit; - if (mode & FALLOC_FL_COLLAPSE_RANGE) - return ext4_collapse_range(inode, offset, len); - - if (mode & FALLOC_FL_INSERT_RANGE) - return ext4_insert_range(inode, offset, len); + if (mode & FALLOC_FL_COLLAPSE_RANGE) { + ret = ext4_collapse_range(inode, offset, len); + goto exit; + } - if (mode & FALLOC_FL_ZERO_RANGE) - return ext4_zero_range(file, offset, len, mode); + if (mode & FALLOC_FL_INSERT_RANGE) { + ret = ext4_insert_range(inode, offset, len); + goto exit; + } + if (mode & FALLOC_FL_ZERO_RANGE) { + ret = ext4_zero_range(file, offset, len, mode); + goto exit; + } trace_ext4_fallocate_enter(inode, offset, len, mode); lblk = offset >> blkbits; @@ -4698,12 +4712,14 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len) goto out; if (file->f_flags & O_SYNC && EXT4_SB(inode->i_sb)->s_journal) { - ret = jbd2_complete_transaction(EXT4_SB(inode->i_sb)->s_journal, - EXT4_I(inode)->i_sync_tid); + ret = ext4_fc_commit(EXT4_SB(inode->i_sb)->s_journal, + EXT4_I(inode)->i_sync_tid); } out: inode_unlock(inode); trace_ext4_fallocate_exit(inode, offset, max_blocks, ret); +exit: + ext4_fc_stop_update(inode); return ret; } @@ -4769,7 +4785,7 @@ int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, int ext4_convert_unwritten_io_end_vec(handle_t *handle, ext4_io_end_t *io_end) { - int ret, err = 0; + int ret = 0, err = 0; struct ext4_io_end_vec *io_end_vec; /* @@ -5291,6 +5307,7 @@ static int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len) ret = PTR_ERR(handle); goto out_mmap; } + ext4_fc_start_ineligible(sb, EXT4_FC_REASON_FALLOC_RANGE); down_write(&EXT4_I(inode)->i_data_sem); ext4_discard_preallocations(inode, 0); @@ -5329,6 +5346,7 @@ static int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len) out_stop: ext4_journal_stop(handle); + ext4_fc_stop_ineligible(sb); out_mmap: up_write(&EXT4_I(inode)->i_mmap_sem); out_mutex: @@ -5429,6 +5447,7 @@ static int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len) ret = PTR_ERR(handle); goto out_mmap; } + ext4_fc_start_ineligible(sb, EXT4_FC_REASON_FALLOC_RANGE); /* Expand file to avoid data loss if there is error while shifting */ inode->i_size += len; @@ -5503,6 +5522,7 @@ static int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len) out_stop: ext4_journal_stop(handle); + ext4_fc_stop_ineligible(sb); out_mmap: up_write(&EXT4_I(inode)->i_mmap_sem); out_mutex: @@ -5784,3 +5804,264 @@ out: return err ? err : mapped; } + +/* + * Updates physical block address and unwritten status of extent + * starting at lblk start and of len. If such an extent doesn't exist, + * this function splits the extent tree appropriately to create an + * extent like this. This function is called in the fast commit + * replay path. Returns 0 on success and error on failure. + */ +int ext4_ext_replay_update_ex(struct inode *inode, ext4_lblk_t start, + int len, int unwritten, ext4_fsblk_t pblk) +{ + struct ext4_ext_path *path = NULL, *ppath; + struct ext4_extent *ex; + int ret; + + path = ext4_find_extent(inode, start, NULL, 0); + if (!path) + return -EINVAL; + ex = path[path->p_depth].p_ext; + if (!ex) { + ret = -EFSCORRUPTED; + goto out; + } + + if (le32_to_cpu(ex->ee_block) != start || + ext4_ext_get_actual_len(ex) != len) { + /* We need to split this extent to match our extent first */ + ppath = path; + down_write(&EXT4_I(inode)->i_data_sem); + ret = ext4_force_split_extent_at(NULL, inode, &ppath, start, 1); + up_write(&EXT4_I(inode)->i_data_sem); + if (ret) + goto out; + kfree(path); + path = ext4_find_extent(inode, start, NULL, 0); + if (IS_ERR(path)) + return -1; + ppath = path; + ex = path[path->p_depth].p_ext; + WARN_ON(le32_to_cpu(ex->ee_block) != start); + if (ext4_ext_get_actual_len(ex) != len) { + down_write(&EXT4_I(inode)->i_data_sem); + ret = ext4_force_split_extent_at(NULL, inode, &ppath, + start + len, 1); + up_write(&EXT4_I(inode)->i_data_sem); + if (ret) + goto out; + kfree(path); + path = ext4_find_extent(inode, start, NULL, 0); + if (IS_ERR(path)) + return -EINVAL; + ex = path[path->p_depth].p_ext; + } + } + if (unwritten) + ext4_ext_mark_unwritten(ex); + else + ext4_ext_mark_initialized(ex); + ext4_ext_store_pblock(ex, pblk); + down_write(&EXT4_I(inode)->i_data_sem); + ret = ext4_ext_dirty(NULL, inode, &path[path->p_depth]); + up_write(&EXT4_I(inode)->i_data_sem); +out: + ext4_ext_drop_refs(path); + kfree(path); + ext4_mark_inode_dirty(NULL, inode); + return ret; +} + +/* Try to shrink the extent tree */ +void ext4_ext_replay_shrink_inode(struct inode *inode, ext4_lblk_t end) +{ + struct ext4_ext_path *path = NULL; + struct ext4_extent *ex; + ext4_lblk_t old_cur, cur = 0; + + while (cur < end) { + path = ext4_find_extent(inode, cur, NULL, 0); + if (IS_ERR(path)) + return; + ex = path[path->p_depth].p_ext; + if (!ex) { + ext4_ext_drop_refs(path); + kfree(path); + ext4_mark_inode_dirty(NULL, inode); + return; + } + old_cur = cur; + cur = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex); + if (cur <= old_cur) + cur = old_cur + 1; + ext4_ext_try_to_merge(NULL, inode, path, ex); + down_write(&EXT4_I(inode)->i_data_sem); + ext4_ext_dirty(NULL, inode, &path[path->p_depth]); + up_write(&EXT4_I(inode)->i_data_sem); + ext4_mark_inode_dirty(NULL, inode); + ext4_ext_drop_refs(path); + kfree(path); + } +} + +/* Check if *cur is a hole and if it is, skip it */ +static void skip_hole(struct inode *inode, ext4_lblk_t *cur) +{ + int ret; + struct ext4_map_blocks map; + + map.m_lblk = *cur; + map.m_len = ((inode->i_size) >> inode->i_sb->s_blocksize_bits) - *cur; + + ret = ext4_map_blocks(NULL, inode, &map, 0); + if (ret != 0) + return; + *cur = *cur + map.m_len; +} + +/* Count number of blocks used by this inode and update i_blocks */ +int ext4_ext_replay_set_iblocks(struct inode *inode) +{ + struct ext4_ext_path *path = NULL, *path2 = NULL; + struct ext4_extent *ex; + ext4_lblk_t cur = 0, end; + int numblks = 0, i, ret = 0; + ext4_fsblk_t cmp1, cmp2; + struct ext4_map_blocks map; + + /* Determin the size of the file first */ + path = ext4_find_extent(inode, EXT_MAX_BLOCKS - 1, NULL, + EXT4_EX_NOCACHE); + if (IS_ERR(path)) + return PTR_ERR(path); + ex = path[path->p_depth].p_ext; + if (!ex) { + ext4_ext_drop_refs(path); + kfree(path); + goto out; + } + end = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex); + ext4_ext_drop_refs(path); + kfree(path); + + /* Count the number of data blocks */ + cur = 0; + while (cur < end) { + map.m_lblk = cur; + map.m_len = end - cur; + ret = ext4_map_blocks(NULL, inode, &map, 0); + if (ret < 0) + break; + if (ret > 0) + numblks += ret; + cur = cur + map.m_len; + } + + /* + * Count the number of extent tree blocks. We do it by looking up + * two successive extents and determining the difference between + * their paths. When path is different for 2 successive extents + * we compare the blocks in the path at each level and increment + * iblocks by total number of differences found. + */ + cur = 0; + skip_hole(inode, &cur); + path = ext4_find_extent(inode, cur, NULL, 0); + if (IS_ERR(path)) + goto out; + numblks += path->p_depth; + ext4_ext_drop_refs(path); + kfree(path); + while (cur < end) { + path = ext4_find_extent(inode, cur, NULL, 0); + if (IS_ERR(path)) + break; + ex = path[path->p_depth].p_ext; + if (!ex) { + ext4_ext_drop_refs(path); + kfree(path); + return 0; + } + cur = max(cur + 1, le32_to_cpu(ex->ee_block) + + ext4_ext_get_actual_len(ex)); + skip_hole(inode, &cur); + + path2 = ext4_find_extent(inode, cur, NULL, 0); + if (IS_ERR(path2)) { + ext4_ext_drop_refs(path); + kfree(path); + break; + } + ex = path2[path2->p_depth].p_ext; + for (i = 0; i <= max(path->p_depth, path2->p_depth); i++) { + cmp1 = cmp2 = 0; + if (i <= path->p_depth) + cmp1 = path[i].p_bh ? + path[i].p_bh->b_blocknr : 0; + if (i <= path2->p_depth) + cmp2 = path2[i].p_bh ? + path2[i].p_bh->b_blocknr : 0; + if (cmp1 != cmp2 && cmp2 != 0) + numblks++; + } + ext4_ext_drop_refs(path); + ext4_ext_drop_refs(path2); + kfree(path); + kfree(path2); + } + +out: + inode->i_blocks = numblks << (inode->i_sb->s_blocksize_bits - 9); + ext4_mark_inode_dirty(NULL, inode); + return 0; +} + +int ext4_ext_clear_bb(struct inode *inode) +{ + struct ext4_ext_path *path = NULL; + struct ext4_extent *ex; + ext4_lblk_t cur = 0, end; + int j, ret = 0; + struct ext4_map_blocks map; + + /* Determin the size of the file first */ + path = ext4_find_extent(inode, EXT_MAX_BLOCKS - 1, NULL, + EXT4_EX_NOCACHE); + if (IS_ERR(path)) + return PTR_ERR(path); + ex = path[path->p_depth].p_ext; + if (!ex) { + ext4_ext_drop_refs(path); + kfree(path); + return 0; + } + end = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex); + ext4_ext_drop_refs(path); + kfree(path); + + cur = 0; + while (cur < end) { + map.m_lblk = cur; + map.m_len = end - cur; + ret = ext4_map_blocks(NULL, inode, &map, 0); + if (ret < 0) + break; + if (ret > 0) { + path = ext4_find_extent(inode, map.m_lblk, NULL, 0); + if (!IS_ERR_OR_NULL(path)) { + for (j = 0; j < path->p_depth; j++) { + + ext4_mb_mark_bb(inode->i_sb, + path[j].p_block, 1, 0); + } + ext4_ext_drop_refs(path); + kfree(path); + } + ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, 0); + } + cur = cur + map.m_len; + } + + return 0; +} |