1 /* 2 * alloc_stats.c --- Update allocation statistics for ext2fs 3 * 4 * Copyright (C) 2001 Theodore Ts'o. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Library 8 * General Public License, version 2. 9 * %End-Header% 10 */ 11 12 #include <stdio.h> 13 14 #include "ext2_fs.h" 15 #include "ext2fs.h" 16 17 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino, 18 int inuse, int isdir) 19 { 20 int group = ext2fs_group_of_ino(fs, ino); 21 22 #ifndef OMIT_COM_ERR 23 if (ino > fs->super->s_inodes_count) { 24 com_err("ext2fs_inode_alloc_stats2", 0, 25 "Illegal inode number: %lu", (unsigned long) ino); 26 return; 27 } 28 #endif 29 if (inuse > 0) 30 ext2fs_mark_inode_bitmap(fs->inode_map, ino); 31 else 32 ext2fs_unmark_inode_bitmap(fs->inode_map, ino); 33 fs->group_desc[group].bg_free_inodes_count -= inuse; 34 if (isdir) 35 fs->group_desc[group].bg_used_dirs_count += inuse; 36 37 /* We don't strictly need to be clearing the uninit flag if inuse < 0 38 * (i.e. freeing inodes) but it also means something is bad. */ 39 fs->group_desc[group].bg_flags &= ~EXT2_BG_INODE_UNINIT; 40 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super, 41 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 42 ext2_ino_t first_unused_inode = fs->super->s_inodes_per_group - 43 fs->group_desc[group].bg_itable_unused + 44 group * fs->super->s_inodes_per_group + 1; 45 46 if (ino >= first_unused_inode) 47 fs->group_desc[group].bg_itable_unused = 48 group * fs->super->s_inodes_per_group + 49 fs->super->s_inodes_per_group - ino; 50 ext2fs_group_desc_csum_set(fs, group); 51 } 52 53 fs->super->s_free_inodes_count -= inuse; 54 ext2fs_mark_super_dirty(fs); 55 ext2fs_mark_ib_dirty(fs); 56 } 57 58 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse) 59 { 60 ext2fs_inode_alloc_stats2(fs, ino, inuse, 0); 61 } 62 63 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse) 64 { 65 int group = ext2fs_group_of_blk(fs, blk); 66 67 #ifndef OMIT_COM_ERR 68 if (blk >= fs->super->s_blocks_count) { 69 com_err("ext2fs_block_alloc_stats", 0, 70 "Illegal block number: %lu", (unsigned long) blk); 71 return; 72 } 73 #endif 74 if (inuse > 0) 75 ext2fs_mark_block_bitmap(fs->block_map, blk); 76 else 77 ext2fs_unmark_block_bitmap(fs->block_map, blk); 78 fs->group_desc[group].bg_free_blocks_count -= inuse; 79 fs->group_desc[group].bg_flags &= ~EXT2_BG_BLOCK_UNINIT; 80 ext2fs_group_desc_csum_set(fs, group); 81 82 fs->super->s_free_blocks_count -= inuse; 83 ext2fs_mark_super_dirty(fs); 84 ext2fs_mark_bb_dirty(fs); 85 if (fs->block_alloc_stats) 86 (fs->block_alloc_stats)(fs, (blk64_t) blk, inuse); 87 } 88 89 void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs, 90 void (*func)(ext2_filsys fs, 91 blk64_t blk, 92 int inuse), 93 void (**old)(ext2_filsys fs, 94 blk64_t blk, 95 int inuse)) 96 { 97 if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS) 98 return; 99 if (old) 100 *old = fs->block_alloc_stats; 101 102 fs->block_alloc_stats = func; 103 } 104
