resize2fs.c revision 5830d6be9c33e23bb20c339036083e6e4fa6795e
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; 189bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 19024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_blocks_count = new_size; 19124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 19224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'oretry: 19369022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o fs->group_desc_count = ext2fs_div_ceil(fs->super->s_blocks_count - 19469022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o fs->super->s_first_data_block, 19569022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o EXT2_BLOCKS_PER_GROUP(fs->super)); 19624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (fs->group_desc_count == 0) 19724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o return EXT2_ET_TOOSMALL; 19869022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count, 19969022e029f3273b3b860bf701219cd3fe615f76bTheodore Ts'o EXT2_DESC_PER_BLOCK(fs->super)); 20024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 20124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 20224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Overhead is the number of bookkeeping blocks per group. It 20324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * includes the superblock backup, the group descriptor 20424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * backups, the inode bitmap, the block bitmap, and the inode 20524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * table. 20624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 2079213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o overhead = (int) (2 + fs->inode_blocks_per_group); 2089213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 2099213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1)) 2109213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o overhead += 1 + fs->desc_blocks + 2119213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_reserved_gdt_blocks; 2129213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 21324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 21424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * See if the last group is big enough to support the 21524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * necessary data structures. If not, we need to get rid of 21624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * it. 21724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 21824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o rem = (fs->super->s_blocks_count - fs->super->s_first_data_block) % 21924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_blocks_per_group; 22024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if ((fs->group_desc_count == 1) && rem && (rem < overhead)) 22124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o return EXT2_ET_TOOSMALL; 22224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (rem && (rem < overhead+50)) { 22324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_blocks_count -= rem; 22424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o goto retry; 22524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 22624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 22724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Adjust the number of inodes 22824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 22924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_inodes_count = fs->super->s_inodes_per_group * 23024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->group_desc_count; 23124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 23224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 23324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Adjust the number of free blocks 23424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 235bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o blk = old_fs->super->s_blocks_count; 23624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (blk > fs->super->s_blocks_count) 23724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_free_blocks_count -= 23824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o (blk - fs->super->s_blocks_count); 23924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o else 24024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_free_blocks_count += 24124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o (fs->super->s_blocks_count - blk); 24224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 24324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 244c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Adjust the number of reserved blocks 245c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 246bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o blk = old_fs->super->s_r_blocks_count * 100 / 247bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_fs->super->s_blocks_count; 248c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs->super->s_r_blocks_count = ((fs->super->s_blocks_count * blk) 249c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o / 100); 250c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 251c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 25224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Adjust the bitmaps for size 25324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 25424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o retval = ext2fs_resize_inode_bitmap(fs->super->s_inodes_count, 25524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_inodes_count, 25624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->inode_map); 257c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) goto errout; 25824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 25924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o real_end = ((EXT2_BLOCKS_PER_GROUP(fs->super) 26024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * fs->group_desc_count)) - 1 + 26124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o fs->super->s_first_data_block; 26224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o retval = ext2fs_resize_block_bitmap(fs->super->s_blocks_count-1, 26324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o real_end, fs->block_map); 26424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 265c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) goto errout; 26624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 26724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 26824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * Reallocate the group descriptors as necessary. 26924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 270bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (old_fs->desc_blocks != fs->desc_blocks) { 271bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = ext2fs_resize_mem(old_fs->desc_blocks * 27276f875daa1c9c2cdc72f0c6f0f7be4bbc7f0fc07Theodore Ts'o fs->blocksize, 27376f875daa1c9c2cdc72f0c6f0f7be4bbc7f0fc07Theodore Ts'o fs->desc_blocks * fs->blocksize, 274c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o &fs->group_desc); 275ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o if (retval) 276a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 277bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (fs->desc_blocks > old_fs->desc_blocks) 2782787276ec59e1d52087d307bc30446d088ec65bcTheodore Ts'o memset((char *) fs->group_desc + 279bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o (old_fs->desc_blocks * fs->blocksize), 0, 280bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o (fs->desc_blocks - old_fs->desc_blocks) * 2812787276ec59e1d52087d307bc30446d088ec65bcTheodore Ts'o fs->blocksize); 28224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 2831e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 2841e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 2859213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * If the resize_inode feature is set, and we are changing the 2869213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * number of descriptor blocks, then adjust 2879213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * s_reserved_gdt_blocks if possible to avoid needing to move 2889213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * the inode table either now or in the future. 2899213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o */ 2909213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if ((fs->super->s_feature_compat & 2919213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o EXT2_FEATURE_COMPAT_RESIZE_INODE) && 292bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o (old_fs->desc_blocks != fs->desc_blocks)) { 2939213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o int new; 2949213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 2959213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o new = ((int) fs->super->s_reserved_gdt_blocks) + 296bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o (old_fs->desc_blocks - fs->desc_blocks); 2979213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (new < 0) 2989213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o new = 0; 2999213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (new > fs->blocksize/4) 3009213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o new = fs->blocksize/4; 3019213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_reserved_gdt_blocks = new; 3029213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (new == 0) 3039213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_feature_compat &= 3049213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o ~EXT2_FEATURE_COMPAT_RESIZE_INODE; 3059213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o } 3069213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 3079213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o /* 308a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * If we are shrinking the number block groups, we're done and 309a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * can exit now. 3101e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 311bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (old_fs->group_desc_count > fs->group_desc_count) { 312c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 313c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 314c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 315bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 316a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 317a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Fix the count of the last (old) block group 318a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 319bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_numblocks = (old_fs->super->s_blocks_count - 320bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_fs->super->s_first_data_block) % 321bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_fs->super->s_blocks_per_group; 3221e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (!old_numblocks) 323bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_numblocks = old_fs->super->s_blocks_per_group; 324bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (old_fs->group_desc_count == fs->group_desc_count) { 325bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o numblocks = (fs->super->s_blocks_count - 326bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o fs->super->s_first_data_block) % 327bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o fs->super->s_blocks_per_group; 3281e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (!numblocks) 329bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o numblocks = fs->super->s_blocks_per_group; 3301e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o } else 331bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o numblocks = fs->super->s_blocks_per_group; 332bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o i = old_fs->group_desc_count - 1; 3331e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_free_blocks_count += (numblocks-old_numblocks); 3341e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 3351e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 336a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * If the number of block groups is staying the same, we're 337a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * done and can exit now. (If the number block groups is 338a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * shrinking, we had exited earlier.) 3391e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 340bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (old_fs->group_desc_count >= fs->group_desc_count) { 341c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 342c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 343c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 344bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 345a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 346a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Initialize the new block group descriptors 347a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 3481e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_block = fs->super->s_first_data_block + 349bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o old_fs->group_desc_count * fs->super->s_blocks_per_group; 350c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 351bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o adj = old_fs->group_desc_count; 35263b44fbe303ea00118cbe24cbbcde351a9bc0aacTheodore Ts'o max_group = fs->group_desc_count - adj; 35376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) 35476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o old_desc_blocks = fs->super->s_first_meta_bg; 35576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o else 3569213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o old_desc_blocks = fs->desc_blocks + 3579213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_reserved_gdt_blocks; 358bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o for (i = old_fs->group_desc_count; 3591e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o i < fs->group_desc_count; i++) { 3601e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o memset(&fs->group_desc[i], 0, 3611e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o sizeof(struct ext2_group_desc)); 3621e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o adjblocks = 0; 3631e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 3641e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (i == fs->group_desc_count-1) { 3651e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o numblocks = (fs->super->s_blocks_count - 3661e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_first_data_block) % 3671e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_blocks_per_group; 3681e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (!numblocks) 3691e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o numblocks = fs->super->s_blocks_per_group; 3701e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o } else 3711e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o numblocks = fs->super->s_blocks_per_group; 3721e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 37376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o has_super = ext2fs_bg_has_super(fs, i); 37476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) { 37576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, group_block); 37676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o adjblocks++; 37776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } 37876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg_size = (fs->blocksize / 37976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o sizeof (struct ext2_group_desc)); 38076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg = i / meta_bg_size; 38176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (!(fs->super->s_feature_incompat & 38276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o EXT2_FEATURE_INCOMPAT_META_BG) || 38376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o (meta_bg < fs->super->s_first_meta_bg)) { 38476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) { 38576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o for (j=0; j < old_desc_blocks; j++) 38676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, 38776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o group_block + 1 + j); 38876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o adjblocks += old_desc_blocks; 38976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } 39076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else { 39176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) 39276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o has_super = 1; 39376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (((i % meta_bg_size) == 0) || 39476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ((i % meta_bg_size) == 1) || 39576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ((i % meta_bg_size) == (meta_bg_size-1))) 3961e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, 39776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o group_block + has_super); 39824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 39976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 4001e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o adjblocks += 2 + fs->inode_blocks_per_group; 4011e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 4021e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o numblocks -= adjblocks; 4031e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_free_blocks_count -= adjblocks; 4041e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_free_inodes_count += 4051e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_inodes_per_group; 4061e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_free_blocks_count = numblocks; 4071e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_free_inodes_count = 4081e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->super->s_inodes_per_group; 4091e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_used_dirs_count = 0; 41024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 4111e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o retval = ext2fs_allocate_group_table(fs, i, 0); 412c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) goto errout; 41324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 414bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o group_block += fs->super->s_blocks_per_group; 415bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 416bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = 0; 417bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 418bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'oerrout: 419bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o return (retval); 420bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o} 421bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 422bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o/* 423bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * This routine adjusts the superblock and other data structures, both 424bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * in disk as well as in memory... 425bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 426bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'ostatic errcode_t adjust_superblock(ext2_resize_t rfs, blk_t new_size) 427bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o{ 428bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o ext2_filsys fs; 429bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o int adj = 0; 430bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o errcode_t retval; 431bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o blk_t group_block; 432bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o unsigned long i; 433bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o unsigned long max_group; 434bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 435bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o fs = rfs->new_fs; 436bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o ext2fs_mark_super_dirty(fs); 437bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o ext2fs_mark_bb_dirty(fs); 438bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o ext2fs_mark_ib_dirty(fs); 439bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 440bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = adjust_fs_info(fs, rfs->old_fs, new_size); 441bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (retval) 442bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 443bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 444bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o /* 445bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * Check to make sure there are enough inodes 446bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 447bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if ((rfs->old_fs->super->s_inodes_count - 448bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o rfs->old_fs->super->s_free_inodes_count) > 449bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o rfs->new_fs->super->s_inodes_count) { 450bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = ENOSPC; 451bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 452bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 453bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 454bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o /* 455bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * If we are shrinking the number block groups, we're done and 456bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * can exit now. 457bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 458bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (rfs->old_fs->group_desc_count > fs->group_desc_count) { 459bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = 0; 460bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 461bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 462bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 463bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o /* 464bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * If the number of block groups is staying the same, we're 465bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * done and can exit now. (If the number block groups is 466bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * shrinking, we had exited earlier.) 467bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 468bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (rfs->old_fs->group_desc_count >= fs->group_desc_count) { 469bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = 0; 470bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 471bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 472bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 473bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o /* 474bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o * Initialize the new block group descriptors 475bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o */ 476bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = ext2fs_get_mem(fs->blocksize * fs->inode_blocks_per_group, 477bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o &rfs->itable_buf); 478bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (retval) 479bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 480bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 481bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o memset(rfs->itable_buf, 0, fs->blocksize * fs->inode_blocks_per_group); 482bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o group_block = fs->super->s_first_data_block + 483bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o rfs->old_fs->group_desc_count * fs->super->s_blocks_per_group; 484bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 485bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o adj = rfs->old_fs->group_desc_count; 486bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o max_group = fs->group_desc_count - adj; 487bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (rfs->progress) { 488bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o retval = rfs->progress(rfs, E2_RSZ_EXTEND_ITABLE_PASS, 489bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o 0, max_group); 490bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o if (retval) 491bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o goto errout; 492bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o } 493bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o for (i = rfs->old_fs->group_desc_count; 494bf69235ad0073c80386b70caba0e1b58e5f85697Theodore Ts'o i < fs->group_desc_count; i++) { 49505e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o /* 49605e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o * Write out the new inode table 49705e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o */ 49805e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o retval = io_channel_write_blk(fs->io, 49905e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o fs->group_desc[i].bg_inode_table, 50005e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o fs->inode_blocks_per_group, 50105e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o rfs->itable_buf); 502c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) goto errout; 503c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 504a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(fs->io); 5053b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 5063b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = rfs->progress(rfs, E2_RSZ_EXTEND_ITABLE_PASS, 5073b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o i - adj + 1, max_group); 5083b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 5093b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 5103b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 5111e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_block += fs->super->s_blocks_per_group; 51224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 513c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o io_channel_flush(fs->io); 514c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 515c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 516c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'oerrout: 517c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return retval; 518c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o} 519c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 520a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* -------------------------------------------------------------------- 521a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 522a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Resize processing, phase 2. 523a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 524a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * In this phase we adjust determine which blocks need to be moved, in 525a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * blocks_to_move(). We then copy the blocks to their ultimate new 526a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * destinations using block_mover(). Since we are copying blocks to 527a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * their new locations, again during this pass we can abort without 528a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * any problems. 529a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * -------------------------------------------------------------------- 530a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 531a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 532c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o/* 533c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * This helper function creates a block bitmap with all of the 534c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * filesystem meta-data blocks. 535c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 536c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'ostatic errcode_t mark_table_blocks(ext2_filsys fs, 53764ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o ext2fs_block_bitmap bmap) 538c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o{ 539c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk_t block, b; 540544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int j; 541544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o dgrp_t i; 54268963d5a262ad49cbdad8f946e59ebc34677fe33Theodore Ts'o unsigned long meta_bg_size; 543544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int old_desc_blocks; 544c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 54576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg_size = (fs->blocksize / sizeof (struct ext2_group_desc)); 546c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o block = fs->super->s_first_data_block; 54776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) 54876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o old_desc_blocks = fs->super->s_first_meta_bg; 54976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o else 5509213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o old_desc_blocks = fs->desc_blocks + 5519213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fs->super->s_reserved_gdt_blocks; 552c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o for (i = 0; i < fs->group_desc_count; i++) { 55364ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o ext2fs_reserve_super_and_bgd(fs, i, bmap); 55476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 555c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 556c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Mark the blocks used for the inode table 557c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 558c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o for (j = 0, b = fs->group_desc[i].bg_inode_table; 559544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o j < (unsigned int) fs->inode_blocks_per_group; 560c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o j++, b++) 561c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(bmap, b); 562c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 563c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 564c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Mark block used for the block bitmap 565c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 566c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(bmap, 567c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs->group_desc[i].bg_block_bitmap); 56864ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 569c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 570c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Mark block used for the inode bitmap 571c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 572c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(bmap, 573c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs->group_desc[i].bg_inode_bitmap); 574c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o block += fs->super->s_blocks_per_group; 575c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 5761e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o return 0; 57724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o} 57824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 57924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o/* 58076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * This function checks to see if a particular block (either a 58176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * superblock or a block group descriptor) overlaps with an inode or 58276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * block bitmap block, or with the inode table. 58376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o */ 58476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'ostatic void mark_fs_metablock(ext2_resize_t rfs, 58576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_block_bitmap meta_bmap, 58676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o int group, blk_t blk) 58776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o{ 58876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2_filsys fs = rfs->new_fs; 58976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 59076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, blk); 59176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, blk); 59276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 59376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o /* 59476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * Check to see if we overlap with the inode or block bitmap, 59576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * or the inode tables. If not, and the block is in use, then 59676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o * mark it as a block to be moved. 59776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o */ 59876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (IS_BLOCK_BM(fs, group, blk)) { 59976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o FS_BLOCK_BM(fs, group) = 0; 60076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o rfs->needed_blocks++; 60176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else if (IS_INODE_BM(fs, group, blk)) { 60276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o FS_INODE_BM(fs, group) = 0; 60376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o rfs->needed_blocks++; 60476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else if (IS_INODE_TB(fs, group, blk)) { 60576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o FS_INODE_TB(fs, group) = 0; 60676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o rfs->needed_blocks++; 60776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else if (ext2fs_test_block_bitmap(rfs->old_fs->block_map, blk) && 60876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) { 60976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, blk); 61076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o rfs->needed_blocks++; 61176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } 61276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o} 61376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 61476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 61576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o/* 61624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * This routine marks and unmarks reserved blocks in the new block 61724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * bitmap. It also determines which blocks need to be moved and 61824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * places this information into the move_blocks bitmap. 61924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 620c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'ostatic errcode_t blocks_to_move(ext2_resize_t rfs) 62124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o{ 622544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int j, has_super; 623544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o dgrp_t i, max_groups; 624544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o blk_t blk, group_blk; 625544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned long old_blocks, new_blocks; 626544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int meta_bg, meta_bg_size; 62724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o errcode_t retval; 628c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2_filsys fs, old_fs; 629c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_block_bitmap meta_bmap; 63024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 631c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs = rfs->new_fs; 632c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o old_fs = rfs->old_fs; 633c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (old_fs->super->s_blocks_count > fs->super->s_blocks_count) 634c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs = rfs->old_fs; 635c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 636a13575f4d29a908add19ea27baa102bc6944ee30Theodore Ts'o retval = ext2fs_allocate_block_bitmap(fs, _("reserved blocks"), 6371e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o &rfs->reserve_blocks); 63824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (retval) 63924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o return retval; 6401e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 641a13575f4d29a908add19ea27baa102bc6944ee30Theodore Ts'o retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"), 642c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o &rfs->move_blocks); 643c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) 644c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return retval; 645c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 64664ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o retval = ext2fs_allocate_block_bitmap(fs, _("meta-data blocks"), 64764ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o &meta_bmap); 64864ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o if (retval) 64964ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o return retval; 65064ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 65164ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o retval = mark_table_blocks(old_fs, meta_bmap); 652c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (retval) 653c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return retval; 654c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 655c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs = rfs->new_fs; 656c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 6571e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 6581e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o * If we're shrinking the filesystem, we need to move all of 6591e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o * the blocks that don't fit any more 6601e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 6611e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o for (blk = fs->super->s_blocks_count; 662c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk < old_fs->super->s_blocks_count; blk++) { 663c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (ext2fs_test_block_bitmap(old_fs->block_map, blk) && 664c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) { 665c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, blk); 6661e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o rfs->needed_blocks++; 667c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 6681e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, blk); 6691e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o } 67024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 67176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) { 67276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o old_blocks = old_fs->super->s_first_meta_bg; 67376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o new_blocks = fs->super->s_first_meta_bg; 67476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else { 6759213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o old_blocks = old_fs->desc_blocks + old_fs->super->s_reserved_gdt_blocks; 6769213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o new_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks; 67776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } 67876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 679c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (old_blocks == new_blocks) { 680c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 681c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 682c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 68324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 6841333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o max_groups = fs->group_desc_count; 6851333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o if (max_groups > old_fs->group_desc_count) 6861333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o max_groups = old_fs->group_desc_count; 687c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o group_blk = old_fs->super->s_first_data_block; 68824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 68924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * If we're reducing the number of descriptor blocks, this 69024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * makes life easy. :-) We just have to mark some extra 69124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * blocks as free. 69224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 69324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o if (old_blocks > new_blocks) { 6941333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o for (i = 0; i < max_groups; i++) { 6951e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (!ext2fs_bg_has_super(fs, i)) { 6961e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_blk += fs->super->s_blocks_per_group; 69724b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o continue; 69824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 699c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o for (blk = group_blk+1+new_blocks; 700c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk < group_blk+1+old_blocks; blk++) { 7011e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_unmark_block_bitmap(fs->block_map, 70224b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o blk); 703052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o rfs->needed_blocks--; 704052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 7051e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_blk += fs->super->s_blocks_per_group; 70624b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 707c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 708c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 70924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 71024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o /* 71124b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o * If we're increasing the number of descriptor blocks, life 7121e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o * gets interesting.... 71324b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o */ 71476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg_size = (fs->blocksize / sizeof (struct ext2_group_desc)); 7151333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o for (i = 0; i < max_groups; i++) { 71676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o has_super = ext2fs_bg_has_super(fs, i); 71776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) 71876dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o mark_fs_metablock(rfs, meta_bmap, i, group_blk); 71976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 72076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o meta_bg = i / meta_bg_size; 72176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (!(fs->super->s_feature_incompat & 72276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o EXT2_FEATURE_INCOMPAT_META_BG) || 72376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o (meta_bg < fs->super->s_first_meta_bg)) { 724424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o if (has_super) { 725424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o for (blk = group_blk+1; 726424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o blk < group_blk + 1 + new_blocks; blk++) 727424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o mark_fs_metablock(rfs, meta_bmap, 728424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o i, blk); 729424cb7b62aa417db2eaec79cfaec7433b31f8726Theodore Ts'o } 73076dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o } else { 73176dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (has_super) 73276dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o has_super = 1; 73376dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o if (((i % meta_bg_size) == 0) || 73476dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ((i % meta_bg_size) == 1) || 73576dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o ((i % meta_bg_size) == (meta_bg_size-1))) 73676dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o mark_fs_metablock(rfs, meta_bmap, i, 73776dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o group_blk + has_super); 73824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o } 73976dd5e5c2842fb1a7b858aad3e68b5e9c16890c9Theodore Ts'o 7401e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (fs->group_desc[i].bg_inode_table && 7411e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_inode_bitmap && 7421e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_block_bitmap) 7431e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o goto next_group; 74424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 7451e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 746c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Reserve the existing meta blocks that we know 747c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * aren't to be moved. 7481e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 7491e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (fs->group_desc[i].bg_block_bitmap) 7501e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, 7511e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_block_bitmap); 7521e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (fs->group_desc[i].bg_inode_bitmap) 7531e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, 7541e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o fs->group_desc[i].bg_inode_bitmap); 7551e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (fs->group_desc[i].bg_inode_table) 7561e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o for (blk = fs->group_desc[i].bg_inode_table, j=0; 7571e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o j < fs->inode_blocks_per_group ; j++, blk++) 7581e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, 7591e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o blk); 76024b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 761c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 762c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Allocate the missing data structures 763c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 7641e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o retval = ext2fs_allocate_group_table(fs, i, 7651e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o rfs->reserve_blocks); 7661e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o if (retval) 767c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o goto errout; 76824b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 7691e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 770c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * For those structures that have changed, we need to 771c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * do bookkeepping. 7721e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 773c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (FS_BLOCK_BM(old_fs, i) != 774c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o (blk = FS_BLOCK_BM(fs, i))) { 775c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, blk); 776c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (ext2fs_test_block_bitmap(old_fs->block_map, blk) && 777c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) 778c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, 779c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk); 780c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 781c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (FS_INODE_BM(old_fs, i) != 782c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o (blk = FS_INODE_BM(fs, i))) { 783c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, blk); 784c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (ext2fs_test_block_bitmap(old_fs->block_map, blk) && 785c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) 786c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, 787c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk); 788c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 78924b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 790052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o /* 791052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * The inode table, if we need to relocate it, is 792052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * handled specially. We have to reserve the blocks 793052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * for both the old and the new inode table, since we 794052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * can't have the inode table be destroyed during the 795052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * block relocation phase. 796052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 797c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (FS_INODE_TB(fs, i) == FS_INODE_TB(old_fs, i)) 798052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o goto next_group; /* inode table not moved */ 799052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 800c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o rfs->needed_blocks += fs->inode_blocks_per_group; 801052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 802052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o /* 803052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * Mark the new inode table as in use in the new block 804c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * allocation bitmap, and move any blocks that might 805c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * be necessary. 806052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 8071e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o for (blk = fs->group_desc[i].bg_inode_table, j=0; 808c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o j < fs->inode_blocks_per_group ; j++, blk++) { 8091e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, blk); 810c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (ext2fs_test_block_bitmap(old_fs->block_map, blk) && 811c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o !ext2fs_test_block_bitmap(meta_bmap, blk)) 812c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_mark_block_bitmap(rfs->move_blocks, 813c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o blk); 814c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 815c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 8161e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o /* 817052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * Make sure the old inode table is reserved in the 818052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * block reservation bitmap. 8191e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o */ 820052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o for (blk = rfs->old_fs->group_desc[i].bg_inode_table, j=0; 821052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o j < fs->inode_blocks_per_group ; j++, blk++) 822052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o ext2fs_mark_block_bitmap(rfs->reserve_blocks, blk); 8231e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o 8241e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o next_group: 8251e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o group_blk += rfs->new_fs->super->s_blocks_per_group; 8261e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o } 827c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o retval = 0; 828c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 829c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'oerrout: 830c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (meta_bmap) 831c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o ext2fs_free_block_bitmap(meta_bmap); 832c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 833c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return retval; 8341e1da29fbd4204a267ebd7c64d37e1f95a9dad08Theodore Ts'o} 83524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 836a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* 837a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * This helper function tries to allocate a new block. We try to 838a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * avoid hitting the original group descriptor blocks at least at 839a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * first, since we want to make it possible to recover from a badly 840a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * aborted resize operation as much as possible. 841a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 842a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * In the future, I may further modify this routine to balance out 843a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * where we get the new blocks across the various block groups. 844a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Ideally we would allocate blocks that corresponded with the block 845a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * group of the containing inode, and keep contiguous blocks 846a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * together. However, this very difficult to do efficiently, since we 847a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * don't have the necessary information up front. 848a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 849a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 850a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define AVOID_OLD 1 851a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#define DESPERATION 2 852a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 853a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic void init_block_alloc(ext2_resize_t rfs) 854a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 855a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->alloc_state = AVOID_OLD; 856a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk = rfs->new_fs->super->s_first_data_block; 8572bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o#if 0 8582bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o /* HACK for testing */ 8592bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o if (rfs->new_fs->super->s_blocks_count > 8602bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->old_fs->super->s_blocks_count) 8612bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->new_blk = rfs->old_fs->super->s_blocks_count; 8622bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o#endif 863a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 864a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 865a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic blk_t get_new_block(ext2_resize_t rfs) 866a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 867a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_filsys fs = rfs->new_fs; 868a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 869a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o while (1) { 870a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->new_blk >= fs->super->s_blocks_count) { 871a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->alloc_state == DESPERATION) 872a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 873a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 874a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 875a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_BMOVE) 876f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Going into desperation mode " 877f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o "for block allocations\n"); 878a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 879a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->alloc_state = DESPERATION; 880a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk = fs->super->s_first_data_block; 881a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; 882a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 883a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (ext2fs_test_block_bitmap(fs->block_map, rfs->new_blk) || 884a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_test_block_bitmap(rfs->reserve_blocks, 885a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk) || 886a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ((rfs->alloc_state == AVOID_OLD) && 887bce49798f7f4380dff5693bc8308019b3cf8de25Theodore Ts'o (rfs->new_blk < rfs->old_fs->super->s_blocks_count) && 888a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_test_block_bitmap(rfs->old_fs->block_map, 889a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk))) { 890a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_blk++; 891a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; 892a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 893a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return rfs->new_blk; 894a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 895a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 896a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 897a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t block_mover(ext2_resize_t rfs) 898a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 899a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o blk_t blk, old_blk, new_blk; 900a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_filsys fs = rfs->new_fs; 901a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_filsys old_fs = rfs->old_fs; 902a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 903a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int size, c; 904a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int to_move, moved; 9057d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o ext2_badblocks_list badblock_list = 0; 9067d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o int bb_modified = 0; 9077d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o 9087d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o retval = ext2fs_read_bb_inode(old_fs, &badblock_list); 9097d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o if (retval) 9107d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o return retval; 911a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 912a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_blk = fs->super->s_first_data_block; 913a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!rfs->itable_buf) { 914a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_get_mem(fs->blocksize * 915a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o fs->inode_blocks_per_group, 916c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o &rfs->itable_buf); 917a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 918a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 919a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 920a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_create_extent_table(&rfs->bmap, 0); 921a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 922a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 923a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 924a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 925a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * The first step is to figure out where all of the blocks 926a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * will go. 927a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 928a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o to_move = moved = 0; 929a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o init_block_alloc(rfs); 930a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o for (blk = old_fs->super->s_first_data_block; 931a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o blk < old_fs->super->s_blocks_count; blk++) { 932a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!ext2fs_test_block_bitmap(old_fs->block_map, blk)) 933a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; 934a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!ext2fs_test_block_bitmap(rfs->move_blocks, blk)) 935a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; 9367d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o if (ext2fs_badblocks_list_test(badblock_list, blk)) { 9377d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o ext2fs_badblocks_list_del(badblock_list, blk); 9387d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o bb_modified++; 9397d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o continue; 9407d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o } 941a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 942a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_blk = get_new_block(rfs); 943a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!new_blk) { 944a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ENOSPC; 945a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 946a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 947a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, new_blk); 948a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_add_extent_entry(rfs->bmap, blk, new_blk); 949a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o to_move++; 950a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 951a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 952a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (to_move == 0) { 953cefbf4870c0593e3c7a01b8d5494463b247d90f0Theodore Ts'o if (rfs->bmap) { 954cefbf4870c0593e3c7a01b8d5494463b247d90f0Theodore Ts'o ext2fs_free_extent_table(rfs->bmap); 955cefbf4870c0593e3c7a01b8d5494463b247d90f0Theodore Ts'o rfs->bmap = 0; 956cefbf4870c0593e3c7a01b8d5494463b247d90f0Theodore Ts'o } 957a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = 0; 958a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 959a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 960a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 961a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 962a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Step two is to actually move the blocks 963a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 964a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_iterate_extent(rfs->bmap, 0, 0, 0); 965a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 966a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 9673b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 9683b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, E2_RSZ_BLOCK_RELOC_PASS, 9693b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o 0, to_move); 9703b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 9713b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 9723b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 973a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o while (1) { 974a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_iterate_extent(rfs->bmap, &old_blk, &new_blk, &size); 975a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 976a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!size) 977a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o break; 978a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 979a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_BMOVE) 980f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Moving %d blocks %u->%u\n", 981f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o size, old_blk, new_blk); 982a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 983a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o do { 984a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o c = size; 985a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (c > fs->inode_blocks_per_group) 986a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o c = fs->inode_blocks_per_group; 987a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = io_channel_read_blk(fs->io, old_blk, c, 988a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->itable_buf); 989a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 990a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = io_channel_write_blk(fs->io, new_blk, c, 991a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->itable_buf); 992a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 993a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o size -= c; 994a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_blk += c; 995a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o old_blk += c; 996a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o moved += c; 997a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->progress) { 998a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(fs->io); 9993b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, 10003b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o E2_RSZ_BLOCK_RELOC_PASS, 1001a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o moved, to_move); 10023b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 10033b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 1004a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1005a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } while (size > 0); 1006a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(fs->io); 1007a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1008a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1009a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'oerrout: 10107d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o if (badblock_list) { 10117d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o if (!retval && bb_modified) 10127d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o retval = ext2fs_update_bb_inode(old_fs, 10137d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o badblock_list); 10147d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o ext2fs_badblocks_list_free(badblock_list); 10157d7bdd578b307cad1dc248310eb279c6fb73b682Theodore Ts'o } 1016a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 1017a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1018a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1019a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1020a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* -------------------------------------------------------------------- 1021a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1022a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Resize processing, phase 3 1023a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1024a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * -------------------------------------------------------------------- 1025a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1026a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1027a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1028a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostruct process_block_struct { 1029a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_resize_t rfs; 1030dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o ext2_ino_t ino; 1031a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct ext2_inode * inode; 1032a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t error; 1033a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int is_dir; 1034a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int changed; 1035a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o}; 1036a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1037a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic int process_block(ext2_filsys fs, blk_t *block_nr, 1038544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o e2_blkcnt_t blockcnt, 1039544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o blk_t ref_block EXT2FS_ATTR((unused)), 1040544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int ref_offset EXT2FS_ATTR((unused)), void *priv_data) 1041a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1042a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct process_block_struct *pb; 1043a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 1044a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o blk_t block, new_block; 1045a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int ret = 0; 1046a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1047a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb = (struct process_block_struct *) priv_data; 1048a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o block = *block_nr; 1049a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb->rfs->bmap) { 1050a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_block = ext2fs_extent_translate(pb->rfs->bmap, block); 1051a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (new_block) { 1052a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o *block_nr = new_block; 1053a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ret |= BLOCK_CHANGED; 1054a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb->changed = 1; 1055a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 1056a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb->rfs->flags & RESIZE_DEBUG_BMOVE) 1057f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("ino=%u, blockcnt=%lld, %u->%u\n", 1058a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb->ino, blockcnt, block, new_block); 1059a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 1060a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o block = new_block; 1061a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1062a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1063a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb->is_dir) { 1064a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_add_dir_block(fs->dblist, pb->ino, 1065101c84f2e049bffcdb6c5ba1784842cdd50dbf05Theodore Ts'o block, (int) blockcnt); 1066a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) { 1067a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb->error = retval; 1068a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ret |= BLOCK_ABORT; 1069a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1070a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1071a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return ret; 1072a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1073a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1074a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* 1075a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Progress callback 1076a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1077544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'ostatic errcode_t progress_callback(ext2_filsys fs, 1078544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o ext2_inode_scan scan EXT2FS_ATTR((unused)), 1079a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o dgrp_t group, void * priv_data) 1080a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1081a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_resize_t rfs = (ext2_resize_t) priv_data; 10823b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o errcode_t retval; 1083a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1084a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 1085f4b2a6db3f13f4210697bcd273086006c719929bTheodore Ts'o * This check is to protect against old ext2 libraries. It 1086f4b2a6db3f13f4210697bcd273086006c719929bTheodore Ts'o * shouldn't be needed against new libraries. 1087a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1088f4b2a6db3f13f4210697bcd273086006c719929bTheodore Ts'o if ((group+1) == 0) 1089a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1090a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1091a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->progress) { 1092a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(fs->io); 10933b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS, 10943b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o group+1, fs->group_desc_count); 10953b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 10963b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o return retval; 1097a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1098a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1099a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1100a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1101a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1102a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t inode_scan_and_fix(ext2_resize_t rfs) 1103a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1104a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct process_block_struct pb; 1105dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o ext2_ino_t ino, new_inode; 1106a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct ext2_inode inode; 1107a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_inode_scan scan = NULL; 1108a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 1109a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int group; 1110a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o char *block_buf = 0; 1111dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o ext2_ino_t start_to_move; 11120ccd488a764c14b27983b92435deca5e1adf9061Theodore Ts'o blk_t orig_size, new_block; 1113a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1114a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if ((rfs->old_fs->group_desc_count <= 1115a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_fs->group_desc_count) && 1116a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o !rfs->bmap) 1117a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1118a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 11192bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o /* 11202bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o * Save the original size of the old filesystem, and 11212bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o * temporarily set the size to be the new size if the new size 11222bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o * is larger. We need to do this to avoid catching an error 11232bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o * by the block iterator routines 11242bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o */ 11252bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o orig_size = rfs->old_fs->super->s_blocks_count; 11262bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o if (orig_size < rfs->new_fs->super->s_blocks_count) 11272bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->old_fs->super->s_blocks_count = 11282bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->new_fs->super->s_blocks_count; 11292bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o 1130a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_open_inode_scan(rfs->old_fs, 0, &scan); 1131a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1132a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1133a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_init_dblist(rfs->old_fs, 0); 1134a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1135c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o retval = ext2fs_get_mem(rfs->old_fs->blocksize * 3, &block_buf); 1136a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1137a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1138a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o start_to_move = (rfs->new_fs->group_desc_count * 1139a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_fs->super->s_inodes_per_group); 1140a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 11413b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 11423b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS, 11433b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o 0, rfs->old_fs->group_desc_count); 11443b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 11453b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 11463b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 1147a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_set_inode_callback(scan, progress_callback, (void *) rfs); 1148a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.rfs = rfs; 1149a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.inode = &inode; 1150a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.error = 0; 1151a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_inode = EXT2_FIRST_INODE(rfs->new_fs->super); 1152a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 1153a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * First, copy all of the inodes that need to be moved 1154a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * elsewhere in the inode table 1155a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1156a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o while (1) { 1157a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_get_next_inode(scan, &ino, &inode); 1158a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1159a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!ino) 1160a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o break; 1161a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 11629213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (inode.i_links_count == 0 && ino != EXT2_RESIZE_INO) 1163a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; /* inode not in use */ 1164a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1165a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.is_dir = LINUX_S_ISDIR(inode.i_mode); 1166a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.changed = 0; 1167a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 11680ccd488a764c14b27983b92435deca5e1adf9061Theodore Ts'o if (inode.i_file_acl && rfs->bmap) { 11690ccd488a764c14b27983b92435deca5e1adf9061Theodore Ts'o new_block = ext2fs_extent_translate(rfs->bmap, 1170ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o inode.i_file_acl); 1171ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o if (new_block) { 1172ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o inode.i_file_acl = new_block; 1173ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o retval = ext2fs_write_inode(rfs->old_fs, 1174ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o ino, &inode); 1175ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o if (retval) goto errout; 1176ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o } 1177ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o } 1178ed909bbe20d3fbeeee65c48dc0df2dbffdf2a0a9Theodore Ts'o 1179a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (ext2fs_inode_has_valid_blocks(&inode) && 1180a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o (rfs->bmap || pb.is_dir)) { 1181a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o pb.ino = ino; 1182a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_block_iterate2(rfs->old_fs, 1183a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ino, 0, block_buf, 1184a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o process_block, &pb); 1185a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 1186a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1187a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb.error) { 1188a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = pb.error; 1189a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1190a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1191a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1192a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1193a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (ino <= start_to_move) 1194a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o continue; /* Don't need to move it. */ 1195a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1196a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 1197a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Find a new inode 1198a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1199a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o while (1) { 1200a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!ext2fs_test_inode_bitmap(rfs->new_fs->inode_map, 1201a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_inode)) 1202a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o break; 1203a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_inode++; 1204a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (new_inode > rfs->new_fs->super->s_inodes_count) { 1205a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ENOSPC; 1206a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1207a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1208a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1209a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_mark_inode_bitmap(rfs->new_fs->inode_map, new_inode); 1210a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (pb.changed) { 1211a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* Get the new version of the inode */ 1212a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_read_inode(rfs->old_fs, ino, &inode); 1213a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1214a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1215085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o inode.i_ctime = time(0); 1216a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_write_inode(rfs->old_fs, new_inode, &inode); 1217a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) goto errout; 1218a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1219a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o group = (new_inode-1) / EXT2_INODES_PER_GROUP(rfs->new_fs->super); 1220a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (LINUX_S_ISDIR(inode.i_mode)) 1221a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->new_fs->group_desc[group].bg_used_dirs_count++; 1222a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1223a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 1224a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_INODEMAP) 1225f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Inode moved %u->%u\n", ino, new_inode); 1226a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 1227a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!rfs->imap) { 1228a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_create_extent_table(&rfs->imap, 0); 1229a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (retval) 1230a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1231a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1232a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_add_extent_entry(rfs->imap, ino, new_inode); 1233a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1234a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(rfs->old_fs->io); 1235a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1236a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'oerrout: 12372bc4d4f7e52ae1af9fb1a3dcff7c8752145d5a5cTheodore Ts'o rfs->old_fs->super->s_blocks_count = orig_size; 1238a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->bmap) { 1239a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_free_extent_table(rfs->bmap); 1240a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->bmap = 0; 1241a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1242a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (scan) 1243a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_close_inode_scan(scan); 1244a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (block_buf) 1245c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o ext2fs_free_mem(&block_buf); 1246a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 1247a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1248a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1249a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* -------------------------------------------------------------------- 1250a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1251a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Resize processing, phase 4. 1252a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1253a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * -------------------------------------------------------------------- 1254a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1255a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1256a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostruct istruct { 1257a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2_resize_t rfs; 12583b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o errcode_t err; 12591333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o unsigned long max_dirs; 1260a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o int num; 1261a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o}; 1262a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1263544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'ostatic int check_and_change_inodes(ext2_ino_t dir, 1264544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int entry EXT2FS_ATTR((unused)), 1265a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct ext2_dir_entry *dirent, int offset, 1266544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int blocksize EXT2FS_ATTR((unused)), 1267544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o char *buf EXT2FS_ATTR((unused)), 1268544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o void *priv_data) 1269a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1270a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct istruct *is = (struct istruct *) priv_data; 1271085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o struct ext2_inode inode; 1272085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o ext2_ino_t new_inode; 1273085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o errcode_t retval; 1274a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1275a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (is->rfs->progress && offset == 0) { 1276a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o io_channel_flush(is->rfs->old_fs->io); 12773b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o is->err = (is->rfs->progress)(is->rfs, 12783b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o E2_RSZ_INODE_REF_UPD_PASS, 12791333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o ++is->num, is->max_dirs); 12803b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (is->err) 12813b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o return DIRENT_ABORT; 1282a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1283a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1284a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!dirent->inode) 1285a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1286a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1287a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o new_inode = ext2fs_extent_translate(is->rfs->imap, dirent->inode); 1288a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1289a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!new_inode) 1290a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1291a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#ifdef RESIZE2FS_DEBUG 1292a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (is->rfs->flags & RESIZE_DEBUG_INODEMAP) 1293f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Inode translate (dir=%u, name=%.*s, %u->%u)\n", 129406191693d4d253a8496677dd02e3b8529a7fce2cTheodore Ts'o dir, dirent->name_len&0xFF, dirent->name, 1295a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o dirent->inode, new_inode); 1296a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o#endif 1297a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1298a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o dirent->inode = new_inode; 1299a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1300085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o /* Update the directory mtime and ctime */ 1301085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o retval = ext2fs_read_inode(is->rfs->old_fs, dir, &inode); 1302085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o if (retval == 0) { 1303085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o inode.i_mtime = inode.i_ctime = time(0); 1304085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o ext2fs_write_inode(is->rfs->old_fs, dir, &inode); 1305085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o } 1306085d2a8397d4eb37ad604f568edb8b2662c22d46Theodore Ts'o 1307a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return DIRENT_CHANGED; 1308a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1309a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1310a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'ostatic errcode_t inode_ref_fix(ext2_resize_t rfs) 1311a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o{ 1312a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 1313a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o struct istruct is; 1314a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1315a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (!rfs->imap) 1316a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return 0; 1317a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1318a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o /* 1319a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Now, we iterate over all of the directories to update the 1320a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * inode references 1321a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1322a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o is.num = 0; 13231333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o is.max_dirs = ext2fs_dblist_count(rfs->old_fs->dblist); 1324a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o is.rfs = rfs; 13253b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o is.err = 0; 1326a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 13273b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 13283b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = (rfs->progress)(rfs, E2_RSZ_INODE_REF_UPD_PASS, 13291333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o 0, is.max_dirs); 13303b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 13313b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 13323b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 1333a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1334a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o retval = ext2fs_dblist_dir_iterate(rfs->old_fs->dblist, 1335a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o DIRENT_FLAG_INCLUDE_EMPTY, 0, 1336a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o check_and_change_inodes, &is); 13373b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 13383b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 13393b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (is.err) { 13403b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = is.err; 13413b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 13423b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 1343a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 13443b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'oerrout: 1345a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_free_extent_table(rfs->imap); 1346a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->imap = 0; 1347a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o return retval; 1348a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o} 1349a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1350a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 1351a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o/* -------------------------------------------------------------------- 1352a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1353a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * Resize processing, phase 5. 1354a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * 1355a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * In this phase we actually move the inode table around, and then 1356a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * update the summary statistics. This is scary, since aborting here 1357a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * will potentially scramble the filesystem. (We are moving the 1358a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * inode tables around in place, and so the potential for lost data, 1359a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * or at the very least scrambling the mapping between filenames and 1360a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * inode numbers is very high in case of a power failure here.) 1361a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * -------------------------------------------------------------------- 1362a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o */ 1363a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 136424b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o 136524b2c7a7a14cec8480a75af7d535cf267e6abe1fTheodore Ts'o/* 1366052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * A very scary routine --- this one moves the inode table around!!! 1367052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * 1368052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * After this you have to use the rfs->new_fs file handle to read and 1369052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * write inodes. 1370052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 1371c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'ostatic errcode_t move_itables(ext2_resize_t rfs) 1372052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o{ 1373544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o int n, num, size, diff; 1374544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o dgrp_t i, max_groups; 1375052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o ext2_filsys fs = rfs->new_fs; 137605e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o char *cp; 137764ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o blk_t old_blk, new_blk, blk; 1378a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o errcode_t retval; 137964ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o int j, to_move, moved; 1380052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 13811333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o max_groups = fs->group_desc_count; 13821333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o if (max_groups > rfs->old_fs->group_desc_count) 13831333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o max_groups = rfs->old_fs->group_desc_count; 1384052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 138505e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o size = fs->blocksize * fs->inode_blocks_per_group; 138605e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (!rfs->itable_buf) { 1387c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o retval = ext2fs_get_mem(size, &rfs->itable_buf); 1388ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o if (retval) 1389ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o return retval; 139005e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o } 1391c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 1392c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o /* 1393c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o * Figure out how many inode tables we need to move 1394c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o */ 1395c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o to_move = moved = 0; 13961333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o for (i=0; i < max_groups; i++) 1397c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (rfs->old_fs->group_desc[i].bg_inode_table != 1398c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o fs->group_desc[i].bg_inode_table) 1399c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o to_move++; 1400c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 1401c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o if (to_move == 0) 1402c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o return 0; 1403c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o 14043b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (rfs->progress) { 14053b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS, 14063b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o 0, to_move); 14073b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 14083b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 14093b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o } 141063b44fbe303ea00118cbe24cbbcde351a9bc0aacTheodore Ts'o 1411a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->old_fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; 1412a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o 14131333fe93446a09ceb866a7f2a1ca0c196964b952Theodore Ts'o for (i=0; i < max_groups; i++) { 1414ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o old_blk = rfs->old_fs->group_desc[i].bg_inode_table; 1415ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o new_blk = fs->group_desc[i].bg_inode_table; 1416ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o diff = new_blk - old_blk; 1417052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 141880c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#ifdef RESIZE2FS_DEBUG 141905e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) 1420f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Itable move group %d block %u->%u (diff %d)\n", 1421ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o i, old_blk, new_blk, diff); 142280c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#endif 1423052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 142405e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (!diff) 1425052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o continue; 1426052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1427ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o retval = io_channel_read_blk(fs->io, old_blk, 142805e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o fs->inode_blocks_per_group, 142905e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o rfs->itable_buf); 1430052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if (retval) 1431a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 143205e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o /* 143305e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o * The end of the inode table segment often contains 1434a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * all zeros, and we're often only moving the inode 1435a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * table down a block or two. If so, we can optimize 1436a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * things by not rewriting blocks that we know to be zero 1437a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o * already. 143805e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o */ 14392787276ec59e1d52087d307bc30446d088ec65bcTheodore Ts'o for (cp = rfs->itable_buf+size-1, n=0; n < size; n++, cp--) 144005e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (*cp) 144105e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o break; 144205e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o n = n >> EXT2_BLOCK_SIZE_BITS(fs->super); 144380c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#ifdef RESIZE2FS_DEBUG 144405e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) 1445f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("%d blocks of zeros...\n", n); 144680c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#endif 144705e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o num = fs->inode_blocks_per_group; 144805e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (n > diff) 144905e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o num -= n; 145005e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o 1451ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o retval = io_channel_write_blk(fs->io, new_blk, 145205e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o num, rfs->itable_buf); 1453052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if (retval) { 1454ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o io_channel_write_blk(fs->io, old_blk, 145505e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o num, rfs->itable_buf); 1456a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1457052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 145805e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (n > diff) { 145905e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o retval = io_channel_write_blk(fs->io, 1460ca8abba7e0970fd1702db53e3f89ceb68c70768cTheodore Ts'o old_blk + fs->inode_blocks_per_group, 1461a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o diff, (rfs->itable_buf + 1462a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o (fs->inode_blocks_per_group - diff) * 1463a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o fs->blocksize)); 146405e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (retval) 1465a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o goto errout; 1466c762c8e63216a301c9de7d24c6136d8370378a08Theodore Ts'o } 146764ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 146864ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o for (blk = rfs->old_fs->group_desc[i].bg_inode_table, j=0; 146964ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o j < fs->inode_blocks_per_group ; j++, blk++) 147064ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o ext2fs_unmark_block_bitmap(fs->block_map, blk); 147164ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 1472a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o rfs->old_fs->group_desc[i].bg_inode_table = new_blk; 1473a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_mark_super_dirty(rfs->old_fs); 147464ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o ext2fs_flush(rfs->old_fs); 147564ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o 1476a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o if (rfs->progress) { 14773b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS, 14783b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o ++moved, to_move); 14793b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o if (retval) 14803b627e8d6735fd81906117d580ee70292b2cfaafTheodore Ts'o goto errout; 1481a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o } 1482052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 148364ad98acbe694e74925ad4e4fc88fd10fd3b3a44Theodore Ts'o mark_table_blocks(fs, fs->block_map); 1484a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'o ext2fs_flush(fs); 148580c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#ifdef RESIZE2FS_DEBUG 148605e112a11b6508c2b12d5d4ee0c322171db9b538Theodore Ts'o if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) 1487f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o printf("Inode table move finished.\n"); 148880c0fc3492278168448017e79730905aa5b9b62bTheodore Ts'o#endif 1489052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o return 0; 1490052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1491a8519a2dbec429846d89fee581a2ecb829904cd2Theodore Ts'oerrout: 1492052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o return retval; 1493052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o} 1494052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1495052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o/* 14969213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * Fix the resize inode 14979213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o */ 14989213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'ostatic errcode_t fix_resize_inode(ext2_filsys fs) 14999213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o{ 15009213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o struct ext2_inode inode; 15019213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o errcode_t retval; 15029213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o char * block_buf; 15039213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15049213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (!(fs->super->s_feature_compat & 15059213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o EXT2_FEATURE_COMPAT_RESIZE_INODE)) 15069213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o return 0; 15079213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15089213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = ext2fs_get_mem(fs->blocksize, &block_buf); 15099213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) goto errout; 15109213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15119213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode); 15129213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) goto errout; 15139213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15149213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o inode.i_blocks = fs->blocksize/512; 15159213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15169213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = ext2fs_write_inode(fs, EXT2_RESIZE_INO, &inode); 15179213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) goto errout; 15189213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15199213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (!inode.i_block[EXT2_DIND_BLOCK]) { 15209213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o /* 15219213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * Avoid zeroing out block #0; that's rude. This 15229213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * should never happen anyway since the filesystem 15239213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o * should be fsck'ed and we assume it is consistent. 15249213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o */ 15259213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o fprintf(stderr, 1526f35fd3d5eeb3e35660ea87adbc170978c3cdf9e3Theodore Ts'o _("Should never happen: resize inode corrupt!\n")); 15279213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o exit(1); 15289213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o } 15299213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15309213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o memset(block_buf, 0, fs->blocksize); 15319213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15329213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = io_channel_write_blk(fs->io, inode.i_block[EXT2_DIND_BLOCK], 15339213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 1, block_buf); 15349213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) goto errout; 15359213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15369213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o retval = ext2fs_create_resize_inode(fs); 15379213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (retval) 15389213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o goto errout; 15399213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15409213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'oerrout: 15419213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o if (block_buf) 15429213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o ext2fs_free_mem(&block_buf); 15439213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o return retval; 15449213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o} 15459213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o 15469213a93b22accd2a27064b12f6bc5f1221ca6a70Theodore Ts'o/* 1547052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * Finally, recalculate the summary information 1548052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 1549052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'ostatic errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs) 1550052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o{ 1551dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o blk_t blk; 1552dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o ext2_ino_t ino; 1553544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int group = 0; 1554544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o unsigned int count = 0; 1555dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o int total_free = 0; 1556dfcdc32f8d6623a35a9e66f503c535e4081b7266Theodore Ts'o int group_free = 0; 1557052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1558052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o /* 1559052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * First calculate the block statistics 1560052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 1561052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o for (blk = fs->super->s_first_data_block; 1562052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o blk < fs->super->s_blocks_count; blk++) { 1563052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if (!ext2fs_fast_test_block_bitmap(fs->block_map, blk)) { 1564052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free++; 1565052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o total_free++; 1566052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1567052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count++; 1568052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if ((count == fs->super->s_blocks_per_group) || 1569052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o (blk == fs->super->s_blocks_count-1)) { 1570052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o fs->group_desc[group++].bg_free_blocks_count = 1571052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free; 1572052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count = 0; 1573052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free = 0; 1574052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1575052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1576052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o fs->super->s_free_blocks_count = total_free; 1577052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o 1578052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o /* 1579052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o * Next, calculate the inode statistics 1580052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o */ 1581052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free = 0; 1582052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o total_free = 0; 1583052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count = 0; 1584052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group = 0; 15855830d6be9c33e23bb20c339036083e6e4fa6795eEric Sandeen 15865830d6be9c33e23bb20c339036083e6e4fa6795eEric Sandeen /* Protect loop from wrap-around if s_inodes_count maxed */ 15875830d6be9c33e23bb20c339036083e6e4fa6795eEric Sandeen for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) { 1588052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if (!ext2fs_fast_test_inode_bitmap(fs->inode_map, ino)) { 1589052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free++; 1590052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o total_free++; 1591052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1592052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count++; 1593052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o if ((count == fs->super->s_inodes_per_group) || 1594052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o (ino == fs->super->s_inodes_count)) { 1595052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o fs->group_desc[group++].bg_free_inodes_count = 1596052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free; 1597052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o count = 0; 1598052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o group_free = 0; 1599052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1600052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o } 1601052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o fs->super->s_free_inodes_count = total_free; 1602052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o ext2fs_mark_super_dirty(fs); 1603052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o return 0; 1604052db4b76e552682c1ad94ff4943faa98c958343Theodore Ts'o} 1605