swapfs.c revision 5d28e3be679b515fb4a2e9ce1716f2452381b308
150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o/* 250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o * swapfs.c --- swap ext2 filesystem data structures 350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o * 48132d840c8f6b0d90ab5048d6f8529f74e1aa0b3Theodore Ts'o * Copyright (C) 1995, 1996, 2002 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#include "ext2_fs.h" 1950e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include "ext2fs.h" 2050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 215df55d7f847e29d23227592a0bb23daad1a61500Theodore Ts'o#ifdef EXT2FS_ENABLE_SWAPFS 22e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'ovoid ext2fs_swap_super(struct ext2_super_block * sb) 2350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o{ 248132d840c8f6b0d90ab5048d6f8529f74e1aa0b3Theodore Ts'o int i; 25e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count); 26e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count); 27e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count); 28e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count); 29e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count); 30e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block); 31e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size); 32e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_log_frag_size = ext2fs_swab32(sb->s_log_frag_size); 33e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group); 34e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_frags_per_group = ext2fs_swab32(sb->s_frags_per_group); 35e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group); 36e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_mtime = ext2fs_swab32(sb->s_mtime); 37e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_wtime = ext2fs_swab32(sb->s_wtime); 38e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count); 39e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count); 40e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_magic = ext2fs_swab16(sb->s_magic); 41e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_state = ext2fs_swab16(sb->s_state); 42e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_errors = ext2fs_swab16(sb->s_errors); 43e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level); 44e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck); 45e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval); 46e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_creator_os = ext2fs_swab32(sb->s_creator_os); 47e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_rev_level = ext2fs_swab32(sb->s_rev_level); 48e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid); 49e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid); 50e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_first_ino = ext2fs_swab32(sb->s_first_ino); 51e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_inode_size = ext2fs_swab16(sb->s_inode_size); 52e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr); 53e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat); 54e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat); 55e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat); 56e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap); 575d28e3be679b515fb4a2e9ce1716f2452381b308Theodore Ts'o sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks); 58e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum); 59e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev); 60e5b38a5fafe4807b54d90a2e70bddf4b41b1695bTheodore Ts'o sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan); 611ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts); 62c046ac7f2e4c53e20cf1e909bbe511f91074b396Theodore Ts'o sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg); 631ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time); 648132d840c8f6b0d90ab5048d6f8529f74e1aa0b3Theodore Ts'o for (i=0; i < 4; i++) 658132d840c8f6b0d90ab5048d6f8529f74e1aa0b3Theodore Ts'o sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]); 661ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o for (i=0; i < 17; i++) 671ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]); 681ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o 6950e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o} 7050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 7150e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'ovoid ext2fs_swap_group_desc(struct ext2_group_desc *gdp) 7250e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o{ 7350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); 7450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); 7550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); 7650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); 7750e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); 7850e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); 7950e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o} 8050e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 811e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'ovoid ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t, 821e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o struct ext2_inode *f, int hostorder) 831e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 841e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o unsigned i; 851e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o int islnk = 0; 8650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 871e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (hostorder && LINUX_S_ISLNK(f->i_mode)) 881e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o islnk = 1; 891e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_mode = ext2fs_swab16(f->i_mode); 901e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!hostorder && LINUX_S_ISLNK(t->i_mode)) 911e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o islnk = 1; 921e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_uid = ext2fs_swab16(f->i_uid); 931e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_size = ext2fs_swab32(f->i_size); 941e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_atime = ext2fs_swab32(f->i_atime); 951e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_ctime = ext2fs_swab32(f->i_ctime); 961e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_mtime = ext2fs_swab32(f->i_mtime); 971e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_dtime = ext2fs_swab32(f->i_dtime); 981e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_gid = ext2fs_swab16(f->i_gid); 991e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_links_count = ext2fs_swab16(f->i_links_count); 1001e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_blocks = ext2fs_swab32(f->i_blocks); 1011e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_flags = ext2fs_swab32(f->i_flags); 1021ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o t->i_file_acl = ext2fs_swab32(f->i_file_acl); 1031ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); 1041ba7a2f2b6a9b152828a06443955a7fb1d139930Theodore Ts'o if (!islnk || ext2fs_inode_data_blocks(fs, t)) { 1051e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o for (i = 0; i < EXT2_N_BLOCKS; i++) 1061e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_block[i] = ext2fs_swab32(f->i_block[i]); 1071e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } else if (t != f) { 1081e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o for (i = 0; i < EXT2_N_BLOCKS; i++) 1091e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_block[i] = f->i_block[i]; 1101e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } 111e72a9ba39471364ad2f9397f645ca547090e3485Theodore Ts'o t->i_generation = ext2fs_swab32(f->i_generation); 1121e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->i_faddr = ext2fs_swab32(f->i_faddr); 11350e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o 1141e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o switch (fs->super->s_creator_os) { 1151e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o case EXT2_OS_LINUX: 11619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd1.linux1.l_i_reserved1 = 11719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd1.linux1.l_i_reserved1); 1181e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag; 1191e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize; 1201e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1); 12180e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o t->osd2.linux2.l_i_uid_high = 12280e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o ext2fs_swab16 (f->osd2.linux2.l_i_uid_high); 12380e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o t->osd2.linux2.l_i_gid_high = 12480e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o ext2fs_swab16 (f->osd2.linux2.l_i_gid_high); 12580e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o t->osd2.linux2.l_i_reserved2 = 12680e808fceb61c2061b32593c610893bf07a863eeTheodore Ts'o ext2fs_swab32(f->osd2.linux2.l_i_reserved2); 1271e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o break; 1281e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o case EXT2_OS_HURD: 1291e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd1.hurd1.h_i_translator = 1301e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab32 (f->osd1.hurd1.h_i_translator); 1311e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; 1321e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; 1331e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_mode_high = 1341e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); 1351e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_uid_high = 1361e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); 1371e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_gid_high = 1381e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); 1391e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.hurd2.h_i_author = 1401e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o ext2fs_swab32 (f->osd2.hurd2.h_i_author); 1411e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o break; 1421e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o case EXT2_OS_MASIX: 14319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd1.masix1.m_i_reserved1 = 14419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd1.masix1.m_i_reserved1); 1451e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag; 1461e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize; 1471e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1); 14819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd2.masix2.m_i_reserved2[0] = 14919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]); 15019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o t->osd2.masix2.m_i_reserved2[1] = 15119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]); 1521e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o break; 1531e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } 1541e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 1555df55d7f847e29d23227592a0bb23daad1a61500Theodore Ts'o#endif 156