| /* |
| * alloc_stats.c --- Update allocation statistics for ext2fs |
| * |
| * Copyright (C) 2001 Theodore Ts'o. |
| * |
| * %Begin-Header% |
| * This file may be redistributed under the terms of the GNU Library |
| * General Public License, version 2. |
| * %End-Header% |
| */ |
| |
| #include "config.h" |
| #include <stdio.h> |
| |
| #include "ext2_fs.h" |
| #include "ext2fs.h" |
| |
| void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino, |
| int inuse, int isdir) |
| { |
| int group = ext2fs_group_of_ino(fs, ino); |
| |
| if (ino > fs->super->s_inodes_count) { |
| #ifndef OMIT_COM_ERR |
| com_err("ext2fs_inode_alloc_stats2", 0, |
| "Illegal inode number: %lu", (unsigned long) ino); |
| #endif |
| return; |
| } |
| if (inuse > 0) |
| ext2fs_mark_inode_bitmap2(fs->inode_map, ino); |
| else |
| ext2fs_unmark_inode_bitmap2(fs->inode_map, ino); |
| ext2fs_bg_free_inodes_count_set(fs, group, ext2fs_bg_free_inodes_count(fs, group) - inuse); |
| if (isdir) |
| ext2fs_bg_used_dirs_count_set(fs, group, ext2fs_bg_used_dirs_count(fs, group) + inuse); |
| |
| /* We don't strictly need to be clearing the uninit flag if inuse < 0 |
| * (i.e. freeing inodes) but it also means something is bad. */ |
| ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT); |
| if (ext2fs_has_group_desc_csum(fs)) { |
| ext2_ino_t first_unused_inode = fs->super->s_inodes_per_group - |
| ext2fs_bg_itable_unused(fs, group) + |
| group * fs->super->s_inodes_per_group + 1; |
| |
| if (ino >= first_unused_inode) |
| ext2fs_bg_itable_unused_set(fs, group, group * fs->super->s_inodes_per_group + fs->super->s_inodes_per_group - ino); |
| ext2fs_group_desc_csum_set(fs, group); |
| } |
| |
| fs->super->s_free_inodes_count -= inuse; |
| ext2fs_mark_super_dirty(fs); |
| ext2fs_mark_ib_dirty(fs); |
| } |
| |
| void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse) |
| { |
| ext2fs_inode_alloc_stats2(fs, ino, inuse, 0); |
| } |
| |
| void ext2fs_block_alloc_stats2(ext2_filsys fs, blk64_t blk, int inuse) |
| { |
| int group = ext2fs_group_of_blk2(fs, blk); |
| |
| if (blk >= ext2fs_blocks_count(fs->super)) { |
| #ifndef OMIT_COM_ERR |
| com_err("ext2fs_block_alloc_stats", 0, |
| "Illegal block number: %lu", (unsigned long) blk); |
| #endif |
| return; |
| } |
| if (inuse > 0) |
| ext2fs_mark_block_bitmap2(fs->block_map, blk); |
| else |
| ext2fs_unmark_block_bitmap2(fs->block_map, blk); |
| ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) - inuse); |
| ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT); |
| ext2fs_group_desc_csum_set(fs, group); |
| |
| ext2fs_free_blocks_count_add(fs->super, |
| -inuse * (blk64_t) EXT2FS_CLUSTER_RATIO(fs)); |
| ext2fs_mark_super_dirty(fs); |
| ext2fs_mark_bb_dirty(fs); |
| if (fs->block_alloc_stats) |
| (fs->block_alloc_stats)(fs, (blk64_t) blk, inuse); |
| } |
| |
| void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse) |
| { |
| ext2fs_block_alloc_stats2(fs, blk, inuse); |
| } |
| |
| void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs, |
| void (*func)(ext2_filsys fs, |
| blk64_t blk, |
| int inuse), |
| void (**old)(ext2_filsys fs, |
| blk64_t blk, |
| int inuse)) |
| { |
| if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS) |
| return; |
| if (old) |
| *old = fs->block_alloc_stats; |
| |
| fs->block_alloc_stats = func; |
| } |
| |
| void ext2fs_block_alloc_stats_range(ext2_filsys fs, blk64_t blk, |
| blk_t num, int inuse) |
| { |
| #ifndef OMIT_COM_ERR |
| if (blk + num > ext2fs_blocks_count(fs->super)) { |
| com_err("ext2fs_block_alloc_stats_range", 0, |
| "Illegal block range: %llu (%u) ", |
| (unsigned long long) blk, num); |
| return; |
| } |
| #endif |
| if (inuse == 0) |
| return; |
| if (inuse > 0) { |
| ext2fs_mark_block_bitmap_range2(fs->block_map, blk, num); |
| inuse = 1; |
| } else { |
| ext2fs_unmark_block_bitmap_range2(fs->block_map, blk, num); |
| inuse = -1; |
| } |
| while (num) { |
| int group = ext2fs_group_of_blk2(fs, blk); |
| blk64_t last_blk = ext2fs_group_last_block2(fs, group); |
| blk64_t n = num; |
| |
| if (blk + num > last_blk) |
| n = last_blk - blk + 1; |
| |
| ext2fs_bg_free_blocks_count_set(fs, group, |
| ext2fs_bg_free_blocks_count(fs, group) - |
| inuse*n/EXT2FS_CLUSTER_RATIO(fs)); |
| ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT); |
| ext2fs_group_desc_csum_set(fs, group); |
| ext2fs_free_blocks_count_add(fs->super, -inuse * (blk64_t) n); |
| blk += n; |
| num -= n; |
| } |
| ext2fs_mark_super_dirty(fs); |
| ext2fs_mark_bb_dirty(fs); |
| if (fs->block_alloc_stats_range) |
| (fs->block_alloc_stats_range)(fs, blk, num, inuse); |
| } |
| |
| void ext2fs_set_block_alloc_stats_range_callback(ext2_filsys fs, |
| void (*func)(ext2_filsys fs, blk64_t blk, |
| blk_t num, int inuse), |
| void (**old)(ext2_filsys fs, blk64_t blk, |
| blk_t num, int inuse)) |
| { |
| if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS) |
| return; |
| if (old) |
| *old = fs->block_alloc_stats_range; |
| |
| fs->block_alloc_stats_range = func; |
| } |