resize2fs.c revision d1b4b85c3a201705c5d3d2916c7a9ca00a04e44c
124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o/* 224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * resize2fs.c --- ext2 main routine 324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * 40cee8a5c423c2a1054c7366e74870592ec8db95eTheodore Ts'o * Copyright (C) 1997, 1998 by Theodore Ts'o and 50cee8a5c423c2a1054c7366e74870592ec8db95eTheodore Ts'o * PowerQuest, Inc. 60cee8a5c423c2a1054c7366e74870592ec8db95eTheodore Ts'o * 70cee8a5c423c2a1054c7366e74870592ec8db95eTheodore Ts'o * Copyright (C) 1999, 2000 by Theosore Ts'o 824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * 924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * %Begin-Header% 100cee8a5c423c2a1054c7366e74870592ec8db95eTheodore Ts'o * This file may be redistributed under the terms of the GNU Public 110cee8a5c423c2a1054c7366e74870592ec8db95eTheodore Ts'o * License. 1224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * %End-Header% 1324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 1424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 1505e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o/* 1605e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o * Resizing a filesystem consists of the following phases: 1705e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o * 18a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1. Adjust superblock and write out new parts of the inode 1905e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o * table 20a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 2. Determine blocks which need to be relocated, and copy the 21a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * contents of blocks from their old locations to the new ones. 22a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 3. Scan the inode table, doing the following: 23a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * a. If blocks have been moved, update the block 24a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * pointers in the inodes and indirect blocks to 25a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * point at the new block locations. 26a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * b. If parts of the inode table need to be evacuated, 27a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * copy inodes from their old locations to their 28a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * new ones. 29a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * c. If (b) needs to be done, note which blocks contain 30a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * directory information, since we will need to 31a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * update the directory information. 32a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 4. Update the directory blocks with the new inode locations. 33a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 5. Move the inode tables, if necessary. 3405e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o */ 35a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 3624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o#include "resize2fs.h" 37b969b1b8a5c13992cadb026114731958644540d8Matthias Andree#include <time.h> 3824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 39546a1ff18cc912003883ff67ba3e87c69f700fc4Theodore Ts'o#ifdef __linux__ /* Kludge for debugging */ 40a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define RESIZE2FS_DEBUG 41a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 42a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 43a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t adjust_superblock(ext2_resize_t rfs, blk_t new_size); 44a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t blocks_to_move(ext2_resize_t rfs); 45a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t block_mover(ext2_resize_t rfs); 46a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t inode_scan_and_fix(ext2_resize_t rfs); 47a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t inode_ref_fix(ext2_resize_t rfs); 48a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t move_itables(ext2_resize_t rfs); 499213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'ostatic errcode_t fix_resize_inode(ext2_filsys fs); 50a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs); 51a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 52a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* 53a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Some helper CPP macros 54a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 55a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define FS_BLOCK_BM(fs, i) ((fs)->group_desc[(i)].bg_block_bitmap) 56a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define FS_INODE_BM(fs, i) ((fs)->group_desc[(i)].bg_inode_bitmap) 57a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define FS_INODE_TB(fs, i) ((fs)->group_desc[(i)].bg_inode_table) 58a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 59a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define IS_BLOCK_BM(fs, i, blk) ((blk) == FS_BLOCK_BM((fs),(i))) 60a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define IS_INODE_BM(fs, i, blk) ((blk) == FS_INODE_BM((fs),(i))) 61a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 62a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define IS_INODE_TB(fs, i, blk) (((blk) >= FS_INODE_TB((fs), (i))) && \ 63a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ((blk) < (FS_INODE_TB((fs), (i)) + \ 64a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o (fs)->inode_blocks_per_group))) 65a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 66a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 67a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 68a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* 69a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * This is the top-level routine which does the dirty deed.... 70a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 71116db1b513f6901415d1f5f8c01fc297d7cc64a4Theodore Ts'oerrcode_t resize_fs(ext2_filsys fs, blk_t *new_size, int flags, 723b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o errcode_t (*progress)(ext2_resize_t rfs, int pass, 73a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o unsigned long cur, 741333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o unsigned long max_val)) 75a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 76a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_resize_t rfs; 77a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 78a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 79a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_read_bitmaps(fs); 80a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 81a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 82a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 83a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 84a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Create the data structure 85a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 86c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o retval = ext2fs_get_mem(sizeof(struct ext2_resize_struct), &rfs); 87a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 88a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 89a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o memset(rfs, 0, sizeof(struct ext2_resize_struct)); 90a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 91a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->old_fs = fs; 92a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->flags = flags; 93a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->itable_buf = 0; 94a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->progress = progress; 95a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_dup_handle(fs, &rfs->new_fs); 96a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 97a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 98a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 99116db1b513f6901415d1f5f8c01fc297d7cc64a4Theodore Ts'o retval = adjust_superblock(rfs, *new_size); 100a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 101a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 102a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 103116db1b513f6901415d1f5f8c01fc297d7cc64a4Theodore Ts'o *new_size = rfs->new_fs->super->s_blocks_count; 104116db1b513f6901415d1f5f8c01fc297d7cc64a4Theodore Ts'o 105a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = blocks_to_move(rfs); 106a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 107a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 108a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 109a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 110a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_BMOVE) 1118deb80a5d1078cbe43eaffcdeebf0a1a549d6a54Takashi Sato printf("Number of free blocks: %u/%u, Needed: %d\n", 112a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->old_fs->super->s_free_blocks_count, 113a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_fs->super->s_free_blocks_count, 114a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->needed_blocks); 115a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 116a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 117a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = block_mover(rfs); 118a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 119a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 120a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 121a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = inode_scan_and_fix(rfs); 122a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 123a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 124a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 125a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = inode_ref_fix(rfs); 126a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 127a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 128a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 129a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = move_itables(rfs); 130a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 131a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 132a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 13364ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o retval = ext2fs_calculate_summary_stats(rfs->new_fs); 13464ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o if (retval) 13564ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o goto errout; 13664ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 1379213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = fix_resize_inode(rfs->new_fs); 1389213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) 1399213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o goto errout; 1409213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 141a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_close(rfs->new_fs); 142a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 143a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 144a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 145a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->flags = flags; 146a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 147a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_free(rfs->old_fs); 148a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->itable_buf) 149c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o ext2fs_free_mem(&rfs->itable_buf); 150c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o ext2fs_free_mem(&rfs); 151a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 152a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 153a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 154a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'oerrout: 155a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->new_fs) 156a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_free(rfs->new_fs); 157a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->itable_buf) 158c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o ext2fs_free_mem(&rfs->itable_buf); 159c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o ext2fs_free_mem(&rfs); 160a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 161a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 162a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 163a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* -------------------------------------------------------------------- 164a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 165a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Resize processing, phase 1. 166a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 167a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * In this phase we adjust the in-memory superblock information, and 168a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * initialize any new parts of the inode table. The new parts of the 169a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * inode table are created in virgin disk space, so we can abort here 170a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * without any side effects. 171a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * -------------------------------------------------------------------- 172a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 173a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 17424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o/* 175bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * This routine is shared by the online and offline resize routines. 176bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * All of the information which is adjusted in memory is done here. 17724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 178bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'oerrcode_t adjust_fs_info(ext2_filsys fs, ext2_filsys old_fs, blk_t new_size) 17924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o{ 18024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o errcode_t retval; 181bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o int overhead = 0; 182bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o int rem; 18324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o blk_t blk, group_block; 184bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o ext2_ino_t real_end; 185bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o int adj, old_numblocks, numblocks, adjblocks; 186bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o unsigned long i, j, old_desc_blocks, max_group; 187544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int meta_bg, meta_bg_size; 188544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int has_super; 189f335864338a6fbce8134a445ffdd0cdeb3f3f1bcEric Sandeen __u64 new_inodes; /* u64 to check for overflow */ 190bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 19124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_blocks_count = new_size; 19224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 19324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'oretry: 19469022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o fs->group_desc_count = ext2fs_div_ceil(fs->super->s_blocks_count - 19569022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o fs->super->s_first_data_block, 19669022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o EXT2_BLOCKS_PER_GROUP(fs->super)); 19724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (fs->group_desc_count == 0) 19824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o return EXT2_ET_TOOSMALL; 19969022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count, 20069022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o EXT2_DESC_PER_BLOCK(fs->super)); 20124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 20224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 20324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Overhead is the number of bookkeeping blocks per group. It 20424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * includes the superblock backup, the group descriptor 20524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * backups, the inode bitmap, the block bitmap, and the inode 20624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * table. 20724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 2089213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o overhead = (int) (2 + fs->inode_blocks_per_group); 2099213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 2109213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1)) 2119213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o overhead += 1 + fs->desc_blocks + 2129213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_reserved_gdt_blocks; 2139213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 21424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 21524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * See if the last group is big enough to support the 21624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * necessary data structures. If not, we need to get rid of 21724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * it. 21824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 21924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o rem = (fs->super->s_blocks_count - fs->super->s_first_data_block) % 22024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_blocks_per_group; 22124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if ((fs->group_desc_count == 1) && rem && (rem < overhead)) 22224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o return EXT2_ET_TOOSMALL; 22324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (rem && (rem < overhead+50)) { 22424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_blocks_count -= rem; 22524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o goto retry; 22624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 22724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 22824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Adjust the number of inodes 22924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 230f335864338a6fbce8134a445ffdd0cdeb3f3f1bcEric Sandeen new_inodes =(__u64)fs->super->s_inodes_per_group * fs->group_desc_count; 231f335864338a6fbce8134a445ffdd0cdeb3f3f1bcEric Sandeen if (new_inodes > ~0U) { 232f335864338a6fbce8134a445ffdd0cdeb3f3f1bcEric Sandeen fprintf(stderr, _("inodes (%llu) must be less than %u"), 233f335864338a6fbce8134a445ffdd0cdeb3f3f1bcEric Sandeen new_inodes, ~0U); 234f335864338a6fbce8134a445ffdd0cdeb3f3f1bcEric Sandeen return EXT2_ET_TOO_MANY_INODES; 235f335864338a6fbce8134a445ffdd0cdeb3f3f1bcEric Sandeen } 23624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_inodes_count = fs->super->s_inodes_per_group * 23724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->group_desc_count; 23824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 23924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 24024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Adjust the number of free blocks 24124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 242bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o blk = old_fs->super->s_blocks_count; 24324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (blk > fs->super->s_blocks_count) 24424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_free_blocks_count -= 24524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o (blk - fs->super->s_blocks_count); 24624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o else 24724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_free_blocks_count += 24824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o (fs->super->s_blocks_count - blk); 24924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 25024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 251c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Adjust the number of reserved blocks 252c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 253d1b4b85c3a201705c5d3d2916c7a9ca00a04e44cEric Sandeen blk = (__u64)old_fs->super->s_r_blocks_count * 100 / 254bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_fs->super->s_blocks_count; 255a8862d9e90d0d94761ba28dbbf9674308fd7d7c0Theodore Ts'o fs->super->s_r_blocks_count = e2p_percent(blk, 256a8862d9e90d0d94761ba28dbbf9674308fd7d7c0Theodore Ts'o fs->super->s_blocks_count); 257c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 258c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 25924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Adjust the bitmaps for size 26024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 26124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o retval = ext2fs_resize_inode_bitmap(fs->super->s_inodes_count, 26224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_inodes_count, 26324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->inode_map); 264c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) goto errout; 26524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 26624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o real_end = ((EXT2_BLOCKS_PER_GROUP(fs->super) 26724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * fs->group_desc_count)) - 1 + 26824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_first_data_block; 26924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o retval = ext2fs_resize_block_bitmap(fs->super->s_blocks_count-1, 27024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o real_end, fs->block_map); 27124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 272c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) goto errout; 27324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 27424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 27524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Reallocate the group descriptors as necessary. 27624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 277bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (old_fs->desc_blocks != fs->desc_blocks) { 278bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = ext2fs_resize_mem(old_fs->desc_blocks * 27976f875daa1c9c2cdc72f0c6f0f7be4bbc7f0fc07Theodore Ts'o fs->blocksize, 28076f875daa1c9c2cdc72f0c6f0f7be4bbc7f0fc07Theodore Ts'o fs->desc_blocks * fs->blocksize, 281c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o &fs->group_desc); 282ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o if (retval) 283a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 284bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (fs->desc_blocks > old_fs->desc_blocks) 2852787276ec59e1d52087d307bc30446d088ec65bcTheodore Ts'o memset((char *) fs->group_desc + 286bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o (old_fs->desc_blocks * fs->blocksize), 0, 287bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o (fs->desc_blocks - old_fs->desc_blocks) * 2882787276ec59e1d52087d307bc30446d088ec65bcTheodore Ts'o fs->blocksize); 28924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 2901e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 2911e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 2929213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * If the resize_inode feature is set, and we are changing the 2939213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * number of descriptor blocks, then adjust 2949213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * s_reserved_gdt_blocks if possible to avoid needing to move 2959213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * the inode table either now or in the future. 2969213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o */ 2979213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if ((fs->super->s_feature_compat & 2989213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o EXT2_FEATURE_COMPAT_RESIZE_INODE) && 299bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o (old_fs->desc_blocks != fs->desc_blocks)) { 3009213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o int new; 3019213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 3029213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o new = ((int) fs->super->s_reserved_gdt_blocks) + 303bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o (old_fs->desc_blocks - fs->desc_blocks); 3049213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (new < 0) 3059213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o new = 0; 3069213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (new > fs->blocksize/4) 3079213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o new = fs->blocksize/4; 3089213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_reserved_gdt_blocks = new; 3099213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (new == 0) 3109213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_feature_compat &= 3119213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o ~EXT2_FEATURE_COMPAT_RESIZE_INODE; 3129213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o } 3139213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 3149213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o /* 315a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * If we are shrinking the number block groups, we're done and 316a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * can exit now. 3171e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 318bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (old_fs->group_desc_count > fs->group_desc_count) { 319c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 320c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 321c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 322bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 323a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 324a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Fix the count of the last (old) block group 325a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 326bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_numblocks = (old_fs->super->s_blocks_count - 327bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_fs->super->s_first_data_block) % 328bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_fs->super->s_blocks_per_group; 3291e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (!old_numblocks) 330bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_numblocks = old_fs->super->s_blocks_per_group; 331bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (old_fs->group_desc_count == fs->group_desc_count) { 332bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o numblocks = (fs->super->s_blocks_count - 333bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o fs->super->s_first_data_block) % 334bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o fs->super->s_blocks_per_group; 3351e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (!numblocks) 336bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o numblocks = fs->super->s_blocks_per_group; 3371e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o } else 338bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o numblocks = fs->super->s_blocks_per_group; 339bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o i = old_fs->group_desc_count - 1; 3401e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_free_blocks_count += (numblocks-old_numblocks); 3411e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 3421e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 343a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * If the number of block groups is staying the same, we're 344a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * done and can exit now. (If the number block groups is 345a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * shrinking, we had exited earlier.) 3461e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 347bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (old_fs->group_desc_count >= fs->group_desc_count) { 348c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 349c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 350c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 351bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 352a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 353a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Initialize the new block group descriptors 354a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 3551e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_block = fs->super->s_first_data_block + 356bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_fs->group_desc_count * fs->super->s_blocks_per_group; 357c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 358bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o adj = old_fs->group_desc_count; 35963b44fbe303ea00118cbe24cbbcde351a9bc0aacTheodore Ts'o max_group = fs->group_desc_count - adj; 36076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) 36176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o old_desc_blocks = fs->super->s_first_meta_bg; 36276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o else 3639213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o old_desc_blocks = fs->desc_blocks + 3649213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_reserved_gdt_blocks; 365bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o for (i = old_fs->group_desc_count; 3661e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o i < fs->group_desc_count; i++) { 3671e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o memset(&fs->group_desc[i], 0, 3681e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o sizeof(struct ext2_group_desc)); 3691e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o adjblocks = 0; 3701e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 3711e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (i == fs->group_desc_count-1) { 3721e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o numblocks = (fs->super->s_blocks_count - 3731e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_first_data_block) % 3741e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_blocks_per_group; 3751e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (!numblocks) 3761e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o numblocks = fs->super->s_blocks_per_group; 3771e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o } else 3781e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o numblocks = fs->super->s_blocks_per_group; 3791e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 38076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o has_super = ext2fs_bg_has_super(fs, i); 38176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) { 38276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, group_block); 38376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o adjblocks++; 38476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } 38576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg_size = (fs->blocksize / 38676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o sizeof (struct ext2_group_desc)); 38776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg = i / meta_bg_size; 38876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (!(fs->super->s_feature_incompat & 38976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o EXT2_FEATURE_INCOMPAT_META_BG) || 39076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o (meta_bg < fs->super->s_first_meta_bg)) { 39176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) { 39276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o for (j=0; j < old_desc_blocks; j++) 39376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, 39476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o group_block + 1 + j); 39576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o adjblocks += old_desc_blocks; 39676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } 39776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else { 39876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) 39976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o has_super = 1; 40076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (((i % meta_bg_size) == 0) || 40176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ((i % meta_bg_size) == 1) || 40276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ((i % meta_bg_size) == (meta_bg_size-1))) 4031e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, 40476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o group_block + has_super); 40524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 40676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 4071e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o adjblocks += 2 + fs->inode_blocks_per_group; 4081e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 4091e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o numblocks -= adjblocks; 4101e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_free_blocks_count -= adjblocks; 4111e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_free_inodes_count += 4121e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_inodes_per_group; 4131e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_free_blocks_count = numblocks; 4141e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_free_inodes_count = 4151e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_inodes_per_group; 4161e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_used_dirs_count = 0; 41724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 4181e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o retval = ext2fs_allocate_group_table(fs, i, 0); 419c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) goto errout; 42024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 421bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o group_block += fs->super->s_blocks_per_group; 422bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 423bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = 0; 424bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 425bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'oerrout: 426bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o return (retval); 427bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o} 428bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 429bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o/* 430bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * This routine adjusts the superblock and other data structures, both 431bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * in disk as well as in memory... 432bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 433bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'ostatic errcode_t adjust_superblock(ext2_resize_t rfs, blk_t new_size) 434bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o{ 435bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o ext2_filsys fs; 436bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o int adj = 0; 437bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o errcode_t retval; 438bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o blk_t group_block; 439bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o unsigned long i; 440bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o unsigned long max_group; 441bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 442bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o fs = rfs->new_fs; 443bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o ext2fs_mark_super_dirty(fs); 444bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o ext2fs_mark_bb_dirty(fs); 445bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o ext2fs_mark_ib_dirty(fs); 446bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 447bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = adjust_fs_info(fs, rfs->old_fs, new_size); 448bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (retval) 449bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 450bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 451bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o /* 452bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * Check to make sure there are enough inodes 453bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 454bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if ((rfs->old_fs->super->s_inodes_count - 455bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o rfs->old_fs->super->s_free_inodes_count) > 456bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o rfs->new_fs->super->s_inodes_count) { 457bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = ENOSPC; 458bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 459bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 460bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 461bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o /* 462bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * If we are shrinking the number block groups, we're done and 463bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * can exit now. 464bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 465bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (rfs->old_fs->group_desc_count > fs->group_desc_count) { 466bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = 0; 467bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 468bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 469bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 470bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o /* 471bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * If the number of block groups is staying the same, we're 472bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * done and can exit now. (If the number block groups is 473bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * shrinking, we had exited earlier.) 474bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 475bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (rfs->old_fs->group_desc_count >= fs->group_desc_count) { 476bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = 0; 477bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 478bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 479bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 480bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o /* 481bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * Initialize the new block group descriptors 482bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 483bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = ext2fs_get_mem(fs->blocksize * fs->inode_blocks_per_group, 484bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o &rfs->itable_buf); 485bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (retval) 486bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 487bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 488bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o memset(rfs->itable_buf, 0, fs->blocksize * fs->inode_blocks_per_group); 489bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o group_block = fs->super->s_first_data_block + 490bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o rfs->old_fs->group_desc_count * fs->super->s_blocks_per_group; 491bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 492bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o adj = rfs->old_fs->group_desc_count; 493bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o max_group = fs->group_desc_count - adj; 494bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (rfs->progress) { 495bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = rfs->progress(rfs, E2_RSZ_EXTEND_ITABLE_PASS, 496bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 0, max_group); 497bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (retval) 498bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 499bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 500bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o for (i = rfs->old_fs->group_desc_count; 501bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o i < fs->group_desc_count; i++) { 50205e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o /* 50305e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o * Write out the new inode table 50405e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o */ 50505e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o retval = io_channel_write_blk(fs->io, 50605e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o fs->group_desc[i].bg_inode_table, 50705e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o fs->inode_blocks_per_group, 50805e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o rfs->itable_buf); 509c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) goto errout; 510c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 511a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(fs->io); 5123b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 5133b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = rfs->progress(rfs, E2_RSZ_EXTEND_ITABLE_PASS, 5143b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o i - adj + 1, max_group); 5153b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 5163b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 5173b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 5181e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_block += fs->super->s_blocks_per_group; 51924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 520c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o io_channel_flush(fs->io); 521c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 522c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 523c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'oerrout: 524c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return retval; 525c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o} 526c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 527a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* -------------------------------------------------------------------- 528a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 529a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Resize processing, phase 2. 530a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 531a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * In this phase we adjust determine which blocks need to be moved, in 532a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * blocks_to_move(). We then copy the blocks to their ultimate new 533a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * destinations using block_mover(). Since we are copying blocks to 534a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * their new locations, again during this pass we can abort without 535a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * any problems. 536a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * -------------------------------------------------------------------- 537a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 538a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 539c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o/* 540c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * This helper function creates a block bitmap with all of the 541c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * filesystem meta-data blocks. 542c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 543c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'ostatic errcode_t mark_table_blocks(ext2_filsys fs, 54464ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o ext2fs_block_bitmap bmap) 545c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o{ 54662c6d1403ea00dd72890862c761a41baa10a7ad4Eric Sandeen blk_t b; 547544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int j; 548544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o dgrp_t i; 54968963d5a262ad49cbdad8f946e59ebc34677fe33Theodore Ts'o unsigned long meta_bg_size; 550544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int old_desc_blocks; 551c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 55276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg_size = (fs->blocksize / sizeof (struct ext2_group_desc)); 55376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) 55476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o old_desc_blocks = fs->super->s_first_meta_bg; 55576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o else 5569213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o old_desc_blocks = fs->desc_blocks + 5579213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_reserved_gdt_blocks; 558c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o for (i = 0; i < fs->group_desc_count; i++) { 55964ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o ext2fs_reserve_super_and_bgd(fs, i, bmap); 56076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 561c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 562c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Mark the blocks used for the inode table 563c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 564c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o for (j = 0, b = fs->group_desc[i].bg_inode_table; 565544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o j < (unsigned int) fs->inode_blocks_per_group; 566c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o j++, b++) 567c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(bmap, b); 568c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 569c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 570c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Mark block used for the block bitmap 571c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 572c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(bmap, 573c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs->group_desc[i].bg_block_bitmap); 57464ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 575c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 576c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Mark block used for the inode bitmap 577c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 578c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(bmap, 579c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs->group_desc[i].bg_inode_bitmap); 580c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 5811e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o return 0; 58224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o} 58324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 58424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o/* 58576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * This function checks to see if a particular block (either a 58676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * superblock or a block group descriptor) overlaps with an inode or 58776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * block bitmap block, or with the inode table. 58876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o */ 58976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'ostatic void mark_fs_metablock(ext2_resize_t rfs, 59076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_block_bitmap meta_bmap, 59176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o int group, blk_t blk) 59276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o{ 59376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2_filsys fs = rfs->new_fs; 59476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 59576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, blk); 59676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, blk); 59776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 59876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o /* 59976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * Check to see if we overlap with the inode or block bitmap, 60076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * or the inode tables. If not, and the block is in use, then 60176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * mark it as a block to be moved. 60276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o */ 60376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (IS_BLOCK_BM(fs, group, blk)) { 60476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o FS_BLOCK_BM(fs, group) = 0; 60576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o rfs->needed_blocks++; 60676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else if (IS_INODE_BM(fs, group, blk)) { 60776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o FS_INODE_BM(fs, group) = 0; 60876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o rfs->needed_blocks++; 60976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else if (IS_INODE_TB(fs, group, blk)) { 61076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o FS_INODE_TB(fs, group) = 0; 61176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o rfs->needed_blocks++; 61276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else if (ext2fs_test_block_bitmap(rfs->old_fs->block_map, blk) && 61376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) { 61476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, blk); 61576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o rfs->needed_blocks++; 61676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } 61776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o} 61876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 61976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 62076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o/* 62124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * This routine marks and unmarks reserved blocks in the new block 62224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * bitmap. It also determines which blocks need to be moved and 62324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * places this information into the move_blocks bitmap. 62424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 625c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'ostatic errcode_t blocks_to_move(ext2_resize_t rfs) 62624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o{ 627544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int j, has_super; 628544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o dgrp_t i, max_groups; 629544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o blk_t blk, group_blk; 630544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned long old_blocks, new_blocks; 631544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int meta_bg, meta_bg_size; 63224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o errcode_t retval; 633c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2_filsys fs, old_fs; 634c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_block_bitmap meta_bmap; 63524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 636c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs = rfs->new_fs; 637c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o old_fs = rfs->old_fs; 638c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (old_fs->super->s_blocks_count > fs->super->s_blocks_count) 639c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs = rfs->old_fs; 640c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 641a13575f4d29a908add19ea27baa102bc6944ee30Theodore Ts'o retval = ext2fs_allocate_block_bitmap(fs, _("reserved blocks"), 6421e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o &rfs->reserve_blocks); 64324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (retval) 64424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o return retval; 6451e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 646a13575f4d29a908add19ea27baa102bc6944ee30Theodore Ts'o retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"), 647c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o &rfs->move_blocks); 648c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) 649c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return retval; 650c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 65164ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o retval = ext2fs_allocate_block_bitmap(fs, _("meta-data blocks"), 65264ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o &meta_bmap); 65364ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o if (retval) 65464ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o return retval; 65564ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 65664ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o retval = mark_table_blocks(old_fs, meta_bmap); 657c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) 658c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return retval; 659c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 660c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs = rfs->new_fs; 661c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 6621e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 6631e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o * If we're shrinking the filesystem, we need to move all of 6641e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o * the blocks that don't fit any more 6651e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 6661e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o for (blk = fs->super->s_blocks_count; 667c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk < old_fs->super->s_blocks_count; blk++) { 668c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (ext2fs_test_block_bitmap(old_fs->block_map, blk) && 669c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) { 670c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, blk); 6711e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o rfs->needed_blocks++; 672c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 6731e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, blk); 6741e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o } 67524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 67676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) { 67776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o old_blocks = old_fs->super->s_first_meta_bg; 67876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o new_blocks = fs->super->s_first_meta_bg; 67976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else { 6809213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o old_blocks = old_fs->desc_blocks + old_fs->super->s_reserved_gdt_blocks; 6819213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o new_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks; 68276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } 68376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 684c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (old_blocks == new_blocks) { 685c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 686c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 687c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 68824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 6891333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o max_groups = fs->group_desc_count; 6901333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o if (max_groups > old_fs->group_desc_count) 6911333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o max_groups = old_fs->group_desc_count; 692c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o group_blk = old_fs->super->s_first_data_block; 69324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 69424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * If we're reducing the number of descriptor blocks, this 69524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * makes life easy. :-) We just have to mark some extra 69624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * blocks as free. 69724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 69824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (old_blocks > new_blocks) { 6991333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o for (i = 0; i < max_groups; i++) { 7001e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (!ext2fs_bg_has_super(fs, i)) { 7011e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_blk += fs->super->s_blocks_per_group; 70224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o continue; 70324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 704c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o for (blk = group_blk+1+new_blocks; 705c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk < group_blk+1+old_blocks; blk++) { 7061e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_unmark_block_bitmap(fs->block_map, 70724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o blk); 708052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o rfs->needed_blocks--; 709052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 7101e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_blk += fs->super->s_blocks_per_group; 71124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 712c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 713c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 71424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 71524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 71624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * If we're increasing the number of descriptor blocks, life 7171e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o * gets interesting.... 71824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 71976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg_size = (fs->blocksize / sizeof (struct ext2_group_desc)); 7201333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o for (i = 0; i < max_groups; i++) { 72176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o has_super = ext2fs_bg_has_super(fs, i); 72276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) 72376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o mark_fs_metablock(rfs, meta_bmap, i, group_blk); 72476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 72576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg = i / meta_bg_size; 72676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (!(fs->super->s_feature_incompat & 72776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o EXT2_FEATURE_INCOMPAT_META_BG) || 72876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o (meta_bg < fs->super->s_first_meta_bg)) { 729424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o if (has_super) { 730424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o for (blk = group_blk+1; 731424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o blk < group_blk + 1 + new_blocks; blk++) 732424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o mark_fs_metablock(rfs, meta_bmap, 733424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o i, blk); 734424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o } 73576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else { 73676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) 73776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o has_super = 1; 73876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (((i % meta_bg_size) == 0) || 73976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ((i % meta_bg_size) == 1) || 74076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ((i % meta_bg_size) == (meta_bg_size-1))) 74176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o mark_fs_metablock(rfs, meta_bmap, i, 74276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o group_blk + has_super); 74324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 74476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 7451e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (fs->group_desc[i].bg_inode_table && 7461e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_inode_bitmap && 7471e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_block_bitmap) 7481e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o goto next_group; 74924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 7501e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 751c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Reserve the existing meta blocks that we know 752c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * aren't to be moved. 7531e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 7541e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (fs->group_desc[i].bg_block_bitmap) 7551e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, 7561e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_block_bitmap); 7571e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (fs->group_desc[i].bg_inode_bitmap) 7581e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, 7591e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_inode_bitmap); 7601e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (fs->group_desc[i].bg_inode_table) 7611e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o for (blk = fs->group_desc[i].bg_inode_table, j=0; 7621e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o j < fs->inode_blocks_per_group ; j++, blk++) 7631e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, 7641e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o blk); 76524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 766c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 767c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Allocate the missing data structures 768c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 7691e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o retval = ext2fs_allocate_group_table(fs, i, 7701e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o rfs->reserve_blocks); 7711e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (retval) 772c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 77324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 7741e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 775c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * For those structures that have changed, we need to 776c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * do bookkeepping. 7771e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 778c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (FS_BLOCK_BM(old_fs, i) != 779c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o (blk = FS_BLOCK_BM(fs, i))) { 780c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, blk); 781c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (ext2fs_test_block_bitmap(old_fs->block_map, blk) && 782c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) 783c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, 784c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk); 785c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 786c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (FS_INODE_BM(old_fs, i) != 787c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o (blk = FS_INODE_BM(fs, i))) { 788c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, blk); 789c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (ext2fs_test_block_bitmap(old_fs->block_map, blk) && 790c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) 791c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, 792c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk); 793c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 79424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 795052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o /* 796052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * The inode table, if we need to relocate it, is 797052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * handled specially. We have to reserve the blocks 798052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * for both the old and the new inode table, since we 799052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * can't have the inode table be destroyed during the 800052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * block relocation phase. 801052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 802c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (FS_INODE_TB(fs, i) == FS_INODE_TB(old_fs, i)) 803052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o goto next_group; /* inode table not moved */ 804052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 805c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o rfs->needed_blocks += fs->inode_blocks_per_group; 806052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 807052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o /* 808052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * Mark the new inode table as in use in the new block 809c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * allocation bitmap, and move any blocks that might 810c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * be necessary. 811052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 8121e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o for (blk = fs->group_desc[i].bg_inode_table, j=0; 813c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o j < fs->inode_blocks_per_group ; j++, blk++) { 8141e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, blk); 815c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (ext2fs_test_block_bitmap(old_fs->block_map, blk) && 816c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) 817c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, 818c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk); 819c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 820c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 8211e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 822052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * Make sure the old inode table is reserved in the 823052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * block reservation bitmap. 8241e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 825052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o for (blk = rfs->old_fs->group_desc[i].bg_inode_table, j=0; 826052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o j < fs->inode_blocks_per_group ; j++, blk++) 827052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, blk); 8281e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 8291e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o next_group: 8301e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_blk += rfs->new_fs->super->s_blocks_per_group; 8311e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o } 832c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 833c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 834c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'oerrout: 835c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (meta_bmap) 836c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_free_block_bitmap(meta_bmap); 837c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 838c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return retval; 8391e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o} 84024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 841a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* 842a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * This helper function tries to allocate a new block. We try to 843a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * avoid hitting the original group descriptor blocks at least at 844a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * first, since we want to make it possible to recover from a badly 845a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * aborted resize operation as much as possible. 846a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 847a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * In the future, I may further modify this routine to balance out 848a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * where we get the new blocks across the various block groups. 849a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Ideally we would allocate blocks that corresponded with the block 850a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * group of the containing inode, and keep contiguous blocks 851a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * together. However, this very difficult to do efficiently, since we 852a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * don't have the necessary information up front. 853a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 854a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 855a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define AVOID_OLD 1 856a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define DESPERATION 2 857a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 858a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic void init_block_alloc(ext2_resize_t rfs) 859a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 860a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->alloc_state = AVOID_OLD; 861a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk = rfs->new_fs->super->s_first_data_block; 8622bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o#if 0 8632bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o /* HACK for testing */ 8642bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o if (rfs->new_fs->super->s_blocks_count > 8652bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->old_fs->super->s_blocks_count) 8662bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->new_blk = rfs->old_fs->super->s_blocks_count; 8672bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o#endif 868a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 869a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 870a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic blk_t get_new_block(ext2_resize_t rfs) 871a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 872a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_filsys fs = rfs->new_fs; 873a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 874a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o while (1) { 875a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->new_blk >= fs->super->s_blocks_count) { 876a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->alloc_state == DESPERATION) 877a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 878a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 879a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 880a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_BMOVE) 881f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Going into desperation mode " 882f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o "for block allocations\n"); 883a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 884a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->alloc_state = DESPERATION; 885a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk = fs->super->s_first_data_block; 886a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; 887a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 888a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (ext2fs_test_block_bitmap(fs->block_map, rfs->new_blk) || 889a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_test_block_bitmap(rfs->reserve_blocks, 890a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk) || 891a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ((rfs->alloc_state == AVOID_OLD) && 892bce49798f7f4380dff5693bc8308019b3cf8de25Theodore Ts'o (rfs->new_blk < rfs->old_fs->super->s_blocks_count) && 893a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_test_block_bitmap(rfs->old_fs->block_map, 894a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk))) { 895a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk++; 896a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; 897a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 898a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return rfs->new_blk; 899a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 900a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 901a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 902a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t block_mover(ext2_resize_t rfs) 903a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 904a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o blk_t blk, old_blk, new_blk; 905a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_filsys fs = rfs->new_fs; 906a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_filsys old_fs = rfs->old_fs; 907a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 908a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int size, c; 909a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int to_move, moved; 9107d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o ext2_badblocks_list badblock_list = 0; 9117d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o int bb_modified = 0; 9127d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o 9137d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o retval = ext2fs_read_bb_inode(old_fs, &badblock_list); 9147d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o if (retval) 9157d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o return retval; 916a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 917a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_blk = fs->super->s_first_data_block; 918a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!rfs->itable_buf) { 919a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_get_mem(fs->blocksize * 920a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o fs->inode_blocks_per_group, 921c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o &rfs->itable_buf); 922a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 923a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 924a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 925a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_create_extent_table(&rfs->bmap, 0); 926a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 927a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 928a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 929a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 930a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * The first step is to figure out where all of the blocks 931a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * will go. 932a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 933a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o to_move = moved = 0; 934a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o init_block_alloc(rfs); 935a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o for (blk = old_fs->super->s_first_data_block; 936a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o blk < old_fs->super->s_blocks_count; blk++) { 937a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!ext2fs_test_block_bitmap(old_fs->block_map, blk)) 938a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; 939a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!ext2fs_test_block_bitmap(rfs->move_blocks, blk)) 940a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; 9417d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o if (ext2fs_badblocks_list_test(badblock_list, blk)) { 9427d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o ext2fs_badblocks_list_del(badblock_list, blk); 9437d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o bb_modified++; 9447d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o continue; 9457d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o } 946a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 947a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_blk = get_new_block(rfs); 948a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!new_blk) { 949a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ENOSPC; 950a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 951a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 952a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, new_blk); 953a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_add_extent_entry(rfs->bmap, blk, new_blk); 954a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o to_move++; 955a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 956a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 957a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (to_move == 0) { 958cefbf4870c0593e3c7a01b8d5494463b247d90f0Theodore Ts'o if (rfs->bmap) { 959cefbf4870c0593e3c7a01b8d5494463b247d90f0Theodore Ts'o ext2fs_free_extent_table(rfs->bmap); 960cefbf4870c0593e3c7a01b8d5494463b247d90f0Theodore Ts'o rfs->bmap = 0; 961cefbf4870c0593e3c7a01b8d5494463b247d90f0Theodore Ts'o } 962a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = 0; 963a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 964a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 965a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 966a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 967a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Step two is to actually move the blocks 968a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 969a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_iterate_extent(rfs->bmap, 0, 0, 0); 970a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 971a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 9723b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 9733b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, E2_RSZ_BLOCK_RELOC_PASS, 9743b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o 0, to_move); 9753b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 9763b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 9773b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 978a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o while (1) { 979a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_iterate_extent(rfs->bmap, &old_blk, &new_blk, &size); 980a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 981a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!size) 982a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o break; 983a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 984a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_BMOVE) 985f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Moving %d blocks %u->%u\n", 986f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o size, old_blk, new_blk); 987a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 988a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o do { 989a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o c = size; 990a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (c > fs->inode_blocks_per_group) 991a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o c = fs->inode_blocks_per_group; 992a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = io_channel_read_blk(fs->io, old_blk, c, 993a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->itable_buf); 994a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 995a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = io_channel_write_blk(fs->io, new_blk, c, 996a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->itable_buf); 997a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 998a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o size -= c; 999a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_blk += c; 1000a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o old_blk += c; 1001a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o moved += c; 1002a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->progress) { 1003a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(fs->io); 10043b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, 10053b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o E2_RSZ_BLOCK_RELOC_PASS, 1006a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o moved, to_move); 10073b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 10083b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 1009a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1010a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } while (size > 0); 1011a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(fs->io); 1012a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1013a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1014a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'oerrout: 10157d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o if (badblock_list) { 10167d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o if (!retval && bb_modified) 10177d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o retval = ext2fs_update_bb_inode(old_fs, 10187d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o badblock_list); 10197d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o ext2fs_badblocks_list_free(badblock_list); 10207d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o } 1021a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 1022a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1023a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1024a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1025a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* -------------------------------------------------------------------- 1026a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1027a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Resize processing, phase 3 1028a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1029a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * -------------------------------------------------------------------- 1030a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1031a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1032a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1033a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostruct process_block_struct { 1034a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_resize_t rfs; 1035dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o ext2_ino_t ino; 1036a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct ext2_inode * inode; 1037a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t error; 1038a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int is_dir; 1039a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int changed; 1040a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o}; 1041a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1042a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic int process_block(ext2_filsys fs, blk_t *block_nr, 1043544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o e2_blkcnt_t blockcnt, 1044544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o blk_t ref_block EXT2FS_ATTR((unused)), 1045544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int ref_offset EXT2FS_ATTR((unused)), void *priv_data) 1046a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1047a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct process_block_struct *pb; 1048a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 1049a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o blk_t block, new_block; 1050a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int ret = 0; 1051a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1052a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb = (struct process_block_struct *) priv_data; 1053a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o block = *block_nr; 1054a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb->rfs->bmap) { 1055a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_block = ext2fs_extent_translate(pb->rfs->bmap, block); 1056a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (new_block) { 1057a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o *block_nr = new_block; 1058a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ret |= BLOCK_CHANGED; 1059a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb->changed = 1; 1060a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 1061a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb->rfs->flags & RESIZE_DEBUG_BMOVE) 1062f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("ino=%u, blockcnt=%lld, %u->%u\n", 1063a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb->ino, blockcnt, block, new_block); 1064a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 1065a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o block = new_block; 1066a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1067a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1068a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb->is_dir) { 1069a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_add_dir_block(fs->dblist, pb->ino, 1070101c84f2e049bffcdb6c5ba1784842cdd50dbf05Theodore Ts'o block, (int) blockcnt); 1071a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) { 1072a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb->error = retval; 1073a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ret |= BLOCK_ABORT; 1074a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1075a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1076a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return ret; 1077a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1078a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1079a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* 1080a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Progress callback 1081a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1082544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'ostatic errcode_t progress_callback(ext2_filsys fs, 1083544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o ext2_inode_scan scan EXT2FS_ATTR((unused)), 1084a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o dgrp_t group, void * priv_data) 1085a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1086a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_resize_t rfs = (ext2_resize_t) priv_data; 10873b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o errcode_t retval; 1088a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1089a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 1090f4b2a6db3f13f4210697bcd273086006c719929bTheodore Ts'o * This check is to protect against old ext2 libraries. It 1091f4b2a6db3f13f4210697bcd273086006c719929bTheodore Ts'o * shouldn't be needed against new libraries. 1092a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1093f4b2a6db3f13f4210697bcd273086006c719929bTheodore Ts'o if ((group+1) == 0) 1094a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1095a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1096a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->progress) { 1097a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(fs->io); 10983b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS, 10993b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o group+1, fs->group_desc_count); 11003b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 11013b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o return retval; 1102a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1103a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1104a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1105a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1106a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1107a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t inode_scan_and_fix(ext2_resize_t rfs) 1108a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1109a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct process_block_struct pb; 1110dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o ext2_ino_t ino, new_inode; 1111a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct ext2_inode inode; 1112a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_inode_scan scan = NULL; 1113a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 1114a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int group; 1115a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o char *block_buf = 0; 1116dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o ext2_ino_t start_to_move; 11170ccd488a764c14b27983b92435deca5e1adf9061Theodore Ts'o blk_t orig_size, new_block; 1118a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1119a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if ((rfs->old_fs->group_desc_count <= 1120a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_fs->group_desc_count) && 1121a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o !rfs->bmap) 1122a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1123a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 11242bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o /* 11252bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o * Save the original size of the old filesystem, and 11262bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o * temporarily set the size to be the new size if the new size 11272bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o * is larger. We need to do this to avoid catching an error 11282bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o * by the block iterator routines 11292bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o */ 11302bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o orig_size = rfs->old_fs->super->s_blocks_count; 11312bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o if (orig_size < rfs->new_fs->super->s_blocks_count) 11322bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->old_fs->super->s_blocks_count = 11332bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->new_fs->super->s_blocks_count; 11342bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o 1135a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_open_inode_scan(rfs->old_fs, 0, &scan); 1136a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1137a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1138a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_init_dblist(rfs->old_fs, 0); 1139a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1140c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o retval = ext2fs_get_mem(rfs->old_fs->blocksize * 3, &block_buf); 1141a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1142a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1143a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o start_to_move = (rfs->new_fs->group_desc_count * 1144a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_fs->super->s_inodes_per_group); 1145a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 11463b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 11473b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS, 11483b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o 0, rfs->old_fs->group_desc_count); 11493b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 11503b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 11513b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 1152a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_set_inode_callback(scan, progress_callback, (void *) rfs); 1153a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.rfs = rfs; 1154a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.inode = &inode; 1155a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.error = 0; 1156a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_inode = EXT2_FIRST_INODE(rfs->new_fs->super); 1157a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 1158a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * First, copy all of the inodes that need to be moved 1159a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * elsewhere in the inode table 1160a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1161a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o while (1) { 1162a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_get_next_inode(scan, &ino, &inode); 1163a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1164a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!ino) 1165a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o break; 1166a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 11679213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (inode.i_links_count == 0 && ino != EXT2_RESIZE_INO) 1168a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; /* inode not in use */ 1169a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1170a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.is_dir = LINUX_S_ISDIR(inode.i_mode); 1171a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.changed = 0; 1172a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 11730ccd488a764c14b27983b92435deca5e1adf9061Theodore Ts'o if (inode.i_file_acl && rfs->bmap) { 11740ccd488a764c14b27983b92435deca5e1adf9061Theodore Ts'o new_block = ext2fs_extent_translate(rfs->bmap, 1175ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o inode.i_file_acl); 1176ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o if (new_block) { 1177ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o inode.i_file_acl = new_block; 1178ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o retval = ext2fs_write_inode(rfs->old_fs, 1179ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o ino, &inode); 1180ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o if (retval) goto errout; 1181ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o } 1182ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o } 1183ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o 1184a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (ext2fs_inode_has_valid_blocks(&inode) && 1185a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o (rfs->bmap || pb.is_dir)) { 1186a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.ino = ino; 1187a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_block_iterate2(rfs->old_fs, 1188a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ino, 0, block_buf, 1189a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o process_block, &pb); 1190a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 1191a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1192a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb.error) { 1193a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = pb.error; 1194a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1195a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1196a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1197a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1198a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (ino <= start_to_move) 1199a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; /* Don't need to move it. */ 1200a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1201a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 1202a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Find a new inode 1203a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1204a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o while (1) { 1205a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!ext2fs_test_inode_bitmap(rfs->new_fs->inode_map, 1206a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_inode)) 1207a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o break; 1208a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_inode++; 1209a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (new_inode > rfs->new_fs->super->s_inodes_count) { 1210a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ENOSPC; 1211a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1212a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1213a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1214a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_mark_inode_bitmap(rfs->new_fs->inode_map, new_inode); 1215a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb.changed) { 1216a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* Get the new version of the inode */ 1217a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_read_inode(rfs->old_fs, ino, &inode); 1218a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1219a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1220085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o inode.i_ctime = time(0); 1221a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_write_inode(rfs->old_fs, new_inode, &inode); 1222a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1223a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1224a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o group = (new_inode-1) / EXT2_INODES_PER_GROUP(rfs->new_fs->super); 1225a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (LINUX_S_ISDIR(inode.i_mode)) 1226a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_fs->group_desc[group].bg_used_dirs_count++; 1227a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1228a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 1229a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_INODEMAP) 1230f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Inode moved %u->%u\n", ino, new_inode); 1231a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 1232a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!rfs->imap) { 1233a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_create_extent_table(&rfs->imap, 0); 1234a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 1235a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1236a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1237a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_add_extent_entry(rfs->imap, ino, new_inode); 1238a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1239a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(rfs->old_fs->io); 1240a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1241a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'oerrout: 12422bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->old_fs->super->s_blocks_count = orig_size; 1243a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->bmap) { 1244a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_free_extent_table(rfs->bmap); 1245a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->bmap = 0; 1246a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1247a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (scan) 1248a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_close_inode_scan(scan); 1249a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (block_buf) 1250c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o ext2fs_free_mem(&block_buf); 1251a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 1252a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1253a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1254a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* -------------------------------------------------------------------- 1255a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1256a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Resize processing, phase 4. 1257a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1258a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * -------------------------------------------------------------------- 1259a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1260a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1261a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostruct istruct { 1262a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_resize_t rfs; 12633b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o errcode_t err; 12641333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o unsigned long max_dirs; 1265a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int num; 1266a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o}; 1267a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1268544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'ostatic int check_and_change_inodes(ext2_ino_t dir, 1269544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int entry EXT2FS_ATTR((unused)), 1270a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct ext2_dir_entry *dirent, int offset, 1271544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int blocksize EXT2FS_ATTR((unused)), 1272544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o char *buf EXT2FS_ATTR((unused)), 1273544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o void *priv_data) 1274a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1275a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct istruct *is = (struct istruct *) priv_data; 1276085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o struct ext2_inode inode; 1277085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o ext2_ino_t new_inode; 1278085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o errcode_t retval; 1279a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1280a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (is->rfs->progress && offset == 0) { 1281a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(is->rfs->old_fs->io); 12823b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o is->err = (is->rfs->progress)(is->rfs, 12833b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o E2_RSZ_INODE_REF_UPD_PASS, 12841333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o ++is->num, is->max_dirs); 12853b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (is->err) 12863b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o return DIRENT_ABORT; 1287a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1288a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1289a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!dirent->inode) 1290a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1291a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1292a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_inode = ext2fs_extent_translate(is->rfs->imap, dirent->inode); 1293a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1294a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!new_inode) 1295a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1296a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 1297a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (is->rfs->flags & RESIZE_DEBUG_INODEMAP) 1298f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Inode translate (dir=%u, name=%.*s, %u->%u)\n", 129906191693d4d253a8496677dd02e3b8529a7fce2cTheodore Ts'o dir, dirent->name_len&0xFF, dirent->name, 1300a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o dirent->inode, new_inode); 1301a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 1302a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1303a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o dirent->inode = new_inode; 1304a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1305085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o /* Update the directory mtime and ctime */ 1306085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o retval = ext2fs_read_inode(is->rfs->old_fs, dir, &inode); 1307085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o if (retval == 0) { 1308085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o inode.i_mtime = inode.i_ctime = time(0); 1309085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o ext2fs_write_inode(is->rfs->old_fs, dir, &inode); 1310085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o } 1311085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o 1312a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return DIRENT_CHANGED; 1313a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1314a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1315a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t inode_ref_fix(ext2_resize_t rfs) 1316a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1317a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 1318a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct istruct is; 1319a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1320a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!rfs->imap) 1321a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1322a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1323a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 1324a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Now, we iterate over all of the directories to update the 1325a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * inode references 1326a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1327a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o is.num = 0; 13281333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o is.max_dirs = ext2fs_dblist_count(rfs->old_fs->dblist); 1329a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o is.rfs = rfs; 13303b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o is.err = 0; 1331a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 13323b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 13333b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, E2_RSZ_INODE_REF_UPD_PASS, 13341333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o 0, is.max_dirs); 13353b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 13363b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 13373b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 1338a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1339a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_dblist_dir_iterate(rfs->old_fs->dblist, 1340a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o DIRENT_FLAG_INCLUDE_EMPTY, 0, 1341a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o check_and_change_inodes, &is); 13423b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 13433b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 13443b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (is.err) { 13453b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = is.err; 13463b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 13473b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 1348a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 13493b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'oerrout: 1350a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_free_extent_table(rfs->imap); 1351a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->imap = 0; 1352a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 1353a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1354a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1355a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1356a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* -------------------------------------------------------------------- 1357a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1358a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Resize processing, phase 5. 1359a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1360a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * In this phase we actually move the inode table around, and then 1361a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * update the summary statistics. This is scary, since aborting here 1362a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * will potentially scramble the filesystem. (We are moving the 1363a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * inode tables around in place, and so the potential for lost data, 1364a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * or at the very least scrambling the mapping between filenames and 1365a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * inode numbers is very high in case of a power failure here.) 1366a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * -------------------------------------------------------------------- 1367a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1368a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 136924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 137024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o/* 1371052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * A very scary routine --- this one moves the inode table around!!! 1372052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * 1373052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * After this you have to use the rfs->new_fs file handle to read and 1374052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * write inodes. 1375052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 1376c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'ostatic errcode_t move_itables(ext2_resize_t rfs) 1377052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o{ 1378544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int n, num, size, diff; 1379544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o dgrp_t i, max_groups; 1380052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o ext2_filsys fs = rfs->new_fs; 138105e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o char *cp; 138264ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o blk_t old_blk, new_blk, blk; 1383a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 138464ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o int j, to_move, moved; 1385052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 13861333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o max_groups = fs->group_desc_count; 13871333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o if (max_groups > rfs->old_fs->group_desc_count) 13881333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o max_groups = rfs->old_fs->group_desc_count; 1389052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 139005e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o size = fs->blocksize * fs->inode_blocks_per_group; 139105e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (!rfs->itable_buf) { 1392c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o retval = ext2fs_get_mem(size, &rfs->itable_buf); 1393ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o if (retval) 1394ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o return retval; 139505e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o } 1396c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 1397c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 1398c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Figure out how many inode tables we need to move 1399c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 1400c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o to_move = moved = 0; 14011333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o for (i=0; i < max_groups; i++) 1402c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (rfs->old_fs->group_desc[i].bg_inode_table != 1403c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs->group_desc[i].bg_inode_table) 1404c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o to_move++; 1405c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 1406c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (to_move == 0) 1407c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return 0; 1408c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 14093b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 14103b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS, 14113b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o 0, to_move); 14123b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 14133b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 14143b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 141563b44fbe303ea00118cbe24cbbcde351a9bc0aacTheodore Ts'o 1416a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->old_fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; 1417a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 14181333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o for (i=0; i < max_groups; i++) { 1419ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o old_blk = rfs->old_fs->group_desc[i].bg_inode_table; 1420ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o new_blk = fs->group_desc[i].bg_inode_table; 1421ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o diff = new_blk - old_blk; 1422052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 142380c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#ifdef RESIZE2FS_DEBUG 142405e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) 1425f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Itable move group %d block %u->%u (diff %d)\n", 1426ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o i, old_blk, new_blk, diff); 142780c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#endif 1428052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 142905e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (!diff) 1430052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o continue; 1431052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1432ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o retval = io_channel_read_blk(fs->io, old_blk, 143305e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o fs->inode_blocks_per_group, 143405e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o rfs->itable_buf); 1435052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if (retval) 1436a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 143705e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o /* 143805e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o * The end of the inode table segment often contains 1439a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * all zeros, and we're often only moving the inode 1440a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * table down a block or two. If so, we can optimize 1441a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * things by not rewriting blocks that we know to be zero 1442a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * already. 144305e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o */ 14442787276ec59e1d52087d307bc30446d088ec65bcTheodore Ts'o for (cp = rfs->itable_buf+size-1, n=0; n < size; n++, cp--) 144505e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (*cp) 144605e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o break; 144705e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o n = n >> EXT2_BLOCK_SIZE_BITS(fs->super); 144880c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#ifdef RESIZE2FS_DEBUG 144905e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) 1450f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("%d blocks of zeros...\n", n); 145180c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#endif 145205e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o num = fs->inode_blocks_per_group; 145305e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (n > diff) 145405e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o num -= n; 145505e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o 1456ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o retval = io_channel_write_blk(fs->io, new_blk, 145705e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o num, rfs->itable_buf); 1458052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if (retval) { 1459ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o io_channel_write_blk(fs->io, old_blk, 146005e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o num, rfs->itable_buf); 1461a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1462052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 146305e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (n > diff) { 146405e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o retval = io_channel_write_blk(fs->io, 1465ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o old_blk + fs->inode_blocks_per_group, 1466a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o diff, (rfs->itable_buf + 1467a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o (fs->inode_blocks_per_group - diff) * 1468a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o fs->blocksize)); 146905e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (retval) 1470a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1471c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 147264ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 147364ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o for (blk = rfs->old_fs->group_desc[i].bg_inode_table, j=0; 147464ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o j < fs->inode_blocks_per_group ; j++, blk++) 147564ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o ext2fs_unmark_block_bitmap(fs->block_map, blk); 147664ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 1477a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->old_fs->group_desc[i].bg_inode_table = new_blk; 1478a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_mark_super_dirty(rfs->old_fs); 147964ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o ext2fs_flush(rfs->old_fs); 148064ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 1481a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->progress) { 14823b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS, 14833b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o ++moved, to_move); 14843b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 14853b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 1486a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1487052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 148864ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o mark_table_blocks(fs, fs->block_map); 1489a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_flush(fs); 149080c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#ifdef RESIZE2FS_DEBUG 149105e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) 1492f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Inode table move finished.\n"); 149380c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#endif 1494052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o return 0; 1495052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1496a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'oerrout: 1497052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o return retval; 1498052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o} 1499052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1500052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o/* 15019213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * Fix the resize inode 15029213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o */ 15039213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'ostatic errcode_t fix_resize_inode(ext2_filsys fs) 15049213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o{ 15059213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o struct ext2_inode inode; 15069213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o errcode_t retval; 15079213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o char * block_buf; 15089213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15099213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (!(fs->super->s_feature_compat & 15109213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o EXT2_FEATURE_COMPAT_RESIZE_INODE)) 15119213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o return 0; 15129213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15139213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = ext2fs_get_mem(fs->blocksize, &block_buf); 15149213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) goto errout; 15159213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15169213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode); 15179213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) goto errout; 15189213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15199213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o inode.i_blocks = fs->blocksize/512; 15209213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15219213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = ext2fs_write_inode(fs, EXT2_RESIZE_INO, &inode); 15229213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) goto errout; 15239213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15249213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (!inode.i_block[EXT2_DIND_BLOCK]) { 15259213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o /* 15269213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * Avoid zeroing out block #0; that's rude. This 15279213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * should never happen anyway since the filesystem 15289213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * should be fsck'ed and we assume it is consistent. 15299213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o */ 15309213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fprintf(stderr, 1531f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o _("Should never happen: resize inode corrupt!\n")); 15329213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o exit(1); 15339213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o } 15349213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15359213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o memset(block_buf, 0, fs->blocksize); 15369213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15379213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = io_channel_write_blk(fs->io, inode.i_block[EXT2_DIND_BLOCK], 15389213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 1, block_buf); 15399213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) goto errout; 15409213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15419213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = ext2fs_create_resize_inode(fs); 15429213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) 15439213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o goto errout; 15449213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15459213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'oerrout: 15469213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (block_buf) 15479213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o ext2fs_free_mem(&block_buf); 15489213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o return retval; 15499213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o} 15509213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15519213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o/* 1552052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * Finally, recalculate the summary information 1553052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 1554052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'ostatic errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs) 1555052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o{ 1556dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o blk_t blk; 1557dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o ext2_ino_t ino; 1558544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int group = 0; 1559544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int count = 0; 1560dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o int total_free = 0; 1561dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o int group_free = 0; 1562052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1563052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o /* 1564052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * First calculate the block statistics 1565052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 1566052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o for (blk = fs->super->s_first_data_block; 1567052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o blk < fs->super->s_blocks_count; blk++) { 1568052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if (!ext2fs_fast_test_block_bitmap(fs->block_map, blk)) { 1569052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free++; 1570052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o total_free++; 1571052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1572052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count++; 1573052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if ((count == fs->super->s_blocks_per_group) || 1574052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o (blk == fs->super->s_blocks_count-1)) { 1575052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o fs->group_desc[group++].bg_free_blocks_count = 1576052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free; 1577052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count = 0; 1578052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free = 0; 1579052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1580052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1581052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o fs->super->s_free_blocks_count = total_free; 1582052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1583052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o /* 1584052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * Next, calculate the inode statistics 1585052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 1586052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free = 0; 1587052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o total_free = 0; 1588052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count = 0; 1589052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group = 0; 15905830d6be9c33e23bb20c339036083e6e4fa6795eEric Sandeen 15915830d6be9c33e23bb20c339036083e6e4fa6795eEric Sandeen /* Protect loop from wrap-around if s_inodes_count maxed */ 15925830d6be9c33e23bb20c339036083e6e4fa6795eEric Sandeen for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) { 1593052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if (!ext2fs_fast_test_inode_bitmap(fs->inode_map, ino)) { 1594052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free++; 1595052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o total_free++; 1596052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1597052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count++; 1598052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if ((count == fs->super->s_inodes_per_group) || 1599052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o (ino == fs->super->s_inodes_count)) { 1600052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o fs->group_desc[group++].bg_free_inodes_count = 1601052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free; 1602052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count = 0; 1603052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free = 0; 1604052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1605052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1606052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o fs->super->s_free_inodes_count = total_free; 1607052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o ext2fs_mark_super_dirty(fs); 1608052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o return 0; 1609052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o} 1610