swapfs.c revision b5abe6fac9c9e7caf4710501d1657d30e4857ef6
150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o/* 250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o * swapfs.c --- swap ext2 filesystem data structures 350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o * 419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Copyright (C) 1995, 1996 Theodore Ts'o. 519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * 619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %Begin-Header% 719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * This file may be redistributed under the terms of the GNU Public 819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * License. 919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %End-Header% 1050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o */ 1150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 1250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include <stdio.h> 134cbe8af4b0d0c72fb28bb500c1bd8a46b00fdde3Theodore Ts'o#if HAVE_UNISTD_H 1450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include <unistd.h> 154cbe8af4b0d0c72fb28bb500c1bd8a46b00fdde3Theodore Ts'o#endif 1650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include <time.h> 1750e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 18b5abe6fac9c9e7caf4710501d1657d30e4857ef6Theodore Ts'o#if EXT2_FLAT_INCLUDES 19b5abe6fac9c9e7caf4710501d1657d30e4857ef6Theodore Ts'o#include "ext2_fs.h" 20b5abe6fac9c9e7caf4710501d1657d30e4857ef6Theodore Ts'o#else 2150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include <linux/ext2_fs.h> 22b5abe6fac9c9e7caf4710501d1657d30e4857ef6Theodore Ts'o#endif 2350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 2450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include "ext2fs.h" 2550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 2650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'ovoid ext2fs_swap_super(struct ext2_super_block * super) 2750e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o{ 281e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o struct ext2fs_sb *s = (struct ext2fs_sb *) super; 291e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 3050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_inodes_count = ext2fs_swab32(super->s_inodes_count); 3150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_blocks_count = ext2fs_swab32(super->s_blocks_count); 3250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_r_blocks_count = ext2fs_swab32(super->s_r_blocks_count); 3350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_free_blocks_count = ext2fs_swab32(super->s_free_blocks_count); 3450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_free_inodes_count = ext2fs_swab32(super->s_free_inodes_count); 3550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_first_data_block = ext2fs_swab32(super->s_first_data_block); 3650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_log_block_size = ext2fs_swab32(super->s_log_block_size); 3750e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_log_frag_size = ext2fs_swab32(super->s_log_frag_size); 3850e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_blocks_per_group = ext2fs_swab32(super->s_blocks_per_group); 3950e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_frags_per_group = ext2fs_swab32(super->s_frags_per_group); 4050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_inodes_per_group = ext2fs_swab32(super->s_inodes_per_group); 4150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_mtime = ext2fs_swab32(super->s_mtime); 4250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_wtime = ext2fs_swab32(super->s_wtime); 4350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_mnt_count = ext2fs_swab16(super->s_mnt_count); 4450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_max_mnt_count = ext2fs_swab16(super->s_max_mnt_count); 4550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_magic = ext2fs_swab16(super->s_magic); 4650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_state = ext2fs_swab16(super->s_state); 4750e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_errors = ext2fs_swab16(super->s_errors); 481e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o s->s_minor_rev_level = ext2fs_swab16(s->s_minor_rev_level); 4950e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_lastcheck = ext2fs_swab32(super->s_lastcheck); 5050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_checkinterval = ext2fs_swab32(super->s_checkinterval); 5150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_creator_os = ext2fs_swab32(super->s_creator_os); 5250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_rev_level = ext2fs_swab32(super->s_rev_level); 5350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#ifdef EXT2_DEF_RESUID 5450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_def_resuid = ext2fs_swab16(super->s_def_resuid); 5550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o super->s_def_resgid = ext2fs_swab16(super->s_def_resgid); 5650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#endif 571e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o s->s_first_ino = ext2fs_swab32(s->s_first_ino); 581e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o s->s_inode_size = ext2fs_swab16(s->s_inode_size); 591e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o s->s_block_group_nr = ext2fs_swab16(s->s_block_group_nr); 601e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o s->s_feature_compat = ext2fs_swab32(s->s_feature_compat); 611e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o s->s_feature_incompat = ext2fs_swab32(s->s_feature_incompat); 621e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o s->s_feature_ro_compat = ext2fs_swab32(s->s_feature_ro_compat); 6350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o} 6450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 6550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'ovoid ext2fs_swap_group_desc(struct ext2_group_desc *gdp) 6650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o{ 6750e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); 6850e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); 6950e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); 7050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); 7150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); 7250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); 7350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o} 7450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 751e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'ovoid ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t, 761e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o struct ext2_inode *f, int hostorder) 771e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 781e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o unsigned i; 791e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o int islnk = 0; 8050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 811e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (hostorder && LINUX_S_ISLNK(f->i_mode)) 821e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o islnk = 1; 831e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_mode = ext2fs_swab16(f->i_mode); 841e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!hostorder && LINUX_S_ISLNK(t->i_mode)) 851e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o islnk = 1; 861e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_uid = ext2fs_swab16(f->i_uid); 871e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_size = ext2fs_swab32(f->i_size); 881e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_atime = ext2fs_swab32(f->i_atime); 891e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_ctime = ext2fs_swab32(f->i_ctime); 901e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_mtime = ext2fs_swab32(f->i_mtime); 911e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_dtime = ext2fs_swab32(f->i_dtime); 921e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_gid = ext2fs_swab16(f->i_gid); 931e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_links_count = ext2fs_swab16(f->i_links_count); 941e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_blocks = ext2fs_swab32(f->i_blocks); 951e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_flags = ext2fs_swab32(f->i_flags); 961e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!islnk || f->i_blocks) { 971e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o for (i = 0; i < EXT2_N_BLOCKS; i++) 981e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_block[i] = ext2fs_swab32(f->i_block[i]); 991e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } else if (t != f) { 1001e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o for (i = 0; i < EXT2_N_BLOCKS; i++) 1011e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_block[i] = f->i_block[i]; 1021e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } 1031e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_version = ext2fs_swab32(f->i_version); 1041e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_file_acl = ext2fs_swab32(f->i_file_acl); 1051e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); 1061e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_faddr = ext2fs_swab32(f->i_faddr); 10750e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 1081e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o switch (fs->super->s_creator_os) { 1091e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o case EXT2_OS_LINUX: 11019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd1.linux1.l_i_reserved1 = 11119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd1.linux1.l_i_reserved1); 1121e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag; 1131e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize; 1141e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1); 11519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd2.linux2.l_i_reserved2[0] = 11619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd2.linux2.l_i_reserved2[0]); 11719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd2.linux2.l_i_reserved2[1] = 11819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd2.linux2.l_i_reserved2[1]); 1191e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o break; 1201e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o case EXT2_OS_HURD: 1211e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd1.hurd1.h_i_translator = 1221e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab32 (f->osd1.hurd1.h_i_translator); 1231e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; 1241e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; 1251e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_mode_high = 1261e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); 1271e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_uid_high = 1281e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); 1291e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_gid_high = 1301e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); 1311e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_author = 1321e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab32 (f->osd2.hurd2.h_i_author); 1331e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o break; 1341e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o case EXT2_OS_MASIX: 13519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd1.masix1.m_i_reserved1 = 13619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd1.masix1.m_i_reserved1); 1371e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag; 1381e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize; 1391e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1); 14019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd2.masix2.m_i_reserved2[0] = 14119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]); 14219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd2.masix2.m_i_reserved2[1] = 14319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]); 1441e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o break; 1451e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } 1461e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 1471e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 148