journal.c revision 6d222f3217b11c9b27f92b4aafe47bfeb59b81fa
117390c047f5470eec005c5461a7926d03d6bbbe7Theodore Ts'o/* 217390c047f5470eec005c5461a7926d03d6bbbe7Theodore Ts'o * journal.c --- code for handling the "ext3" journal 33b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * 43b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * Copyright (C) 2000 Andreas Dilger 53b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * Copyright (C) 2000 Theodore Ts'o 63b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * 73b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * Parts of the code are based on fs/jfs/journal.c by Stephen C. Tweedie 83b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * Copyright (C) 1999 Red Hat Software 93b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * 103b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * This file may be redistributed under the terms of the 113b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * GNU General Public License version 2 or at your discretion 123b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * any later version. 1317390c047f5470eec005c5461a7926d03d6bbbe7Theodore Ts'o */ 1417390c047f5470eec005c5461a7926d03d6bbbe7Theodore Ts'o 153b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#ifdef HAVE_SYS_MOUNT_H 163b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#include <sys/mount.h> 173b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#define MNT_FL (MS_MGC_VAL | MS_RDONLY) 183b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#endif 193b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#ifdef HAVE_SYS_STAT_H 203b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#include <sys/stat.h> 213b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#endif 2217390c047f5470eec005c5461a7926d03d6bbbe7Theodore Ts'o 2353ef44c40a3e425d2c700d8fd77a6b655aa121feTheodore Ts'o#define E2FSCK_INCLUDE_INLINE_FUNCS 240e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o#include "jfs_user.h" 253b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#include "problem.h" 263b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#include "uuid/uuid.h" 2717390c047f5470eec005c5461a7926d03d6bbbe7Theodore Ts'o 28328a5ce4ae7bd30a3a57094531bcb6688207415eTheodore Ts'o#ifdef JFS_DEBUG /* Enabled by configure --enable-jfs-debug */ 293b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'ostatic int bh_count = 0; 30328a5ce4ae7bd30a3a57094531bcb6688207415eTheodore Ts'oint journal_enable_debug = 2; 313b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o#endif 323b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 33b2f93192a1701855d4f5f05f0087c45e92a35681Theodore Ts'o/* Kernel compatibility functions for handling the journal. These allow us 34b2f93192a1701855d4f5f05f0087c45e92a35681Theodore Ts'o * to use the recovery.c file virtually unchanged from the kernel, so we 35b2f93192a1701855d4f5f05f0087c45e92a35681Theodore Ts'o * don't have to do much to keep kernel and user recovery in sync. 36b2f93192a1701855d4f5f05f0087c45e92a35681Theodore Ts'o */ 373b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'oint bmap(struct inode *inode, int block) 383b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 393b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o int retval; 403b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o blk_t phys; 413b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 423b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o retval = ext2fs_bmap(inode->i_ctx->fs, inode->i_ino, &inode->i_ext2, 433b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o NULL, 0, block, &phys); 443b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 453b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (retval) 463b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o com_err(inode->i_ctx->device_name, retval, 473b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o _("bmap journal inode %ld, block %d\n"), 483b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o inode->i_ino, block); 493b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 503b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return phys; 513b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 523b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 533b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'ostruct buffer_head *getblk(e2fsck_t ctx, blk_t blocknr, int blocksize) 543b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 553b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o struct buffer_head *bh; 563b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 573b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o bh = e2fsck_allocate_memory(ctx, sizeof(*bh), "block buffer"); 583b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (!bh) 593b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return NULL; 603b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 613b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o jfs_debug(4, "getblk for block %lu (%d bytes)(total %d)\n", 6253ef44c40a3e425d2c700d8fd77a6b655aa121feTheodore Ts'o (unsigned long) blocknr, blocksize, ++bh_count); 633b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 643b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o bh->b_ctx = ctx; 653b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o bh->b_size = blocksize; 663b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o bh->b_blocknr = blocknr; 673b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 683b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return bh; 693b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 703b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 710e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'ovoid ll_rw_block(int rw, int nr, struct buffer_head *bhp[]) 723b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 733b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o int retval; 740e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o struct buffer_head *bh; 753b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 760e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o for (; nr > 0; --nr) { 770e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh = *bhp++; 780e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o if (rw == READ && !bh->b_uptodate) { 790e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o jfs_debug(3, "reading block %lu/%p\n", 8053ef44c40a3e425d2c700d8fd77a6b655aa121feTheodore Ts'o (unsigned long) bh->b_blocknr, (void *) bh); 81adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o retval = io_channel_read_blk(bh->b_ctx->journal_io, 820e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh->b_blocknr, 830e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 1, bh->b_data); 840e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o if (retval) { 850e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o com_err(bh->b_ctx->device_name, retval, 860e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o "while reading block %ld\n", 870e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh->b_blocknr); 880e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh->b_err = retval; 890e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o continue; 900e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o } 910e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh->b_uptodate = 1; 920e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o } else if (rw == WRITE && bh->b_dirty) { 930e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o jfs_debug(3, "writing block %lu/%p\n", 9453ef44c40a3e425d2c700d8fd77a6b655aa121feTheodore Ts'o (unsigned long) bh->b_blocknr, (void *) bh); 95adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o retval = io_channel_write_blk(bh->b_ctx->journal_io, 960e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh->b_blocknr, 970e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 1, bh->b_data); 980e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o if (retval) { 990e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o com_err(bh->b_ctx->device_name, retval, 1000e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o "while writing block %ld\n", 1010e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh->b_blocknr); 1020e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh->b_err = retval; 1030e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o continue; 1040e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o } 1050e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh->b_dirty = 0; 1060e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o bh->b_uptodate = 1; 1070e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o } else 1080e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o jfs_debug(3, "no-op %s for block %lu\n", 1090e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o rw == READ ? "read" : "write", 11053ef44c40a3e425d2c700d8fd77a6b655aa121feTheodore Ts'o (unsigned long) bh->b_blocknr); 1110e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o } 1123b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 1133b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 1143b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'ovoid mark_buffer_dirty(struct buffer_head *bh, int dummy) 1153b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 1163b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o bh->b_dirty = dummy | 1; /* use dummy to avoid unused variable */ 1173b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 1183b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 1196a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'ostatic void mark_buffer_clean(struct buffer_head * bh) 1206a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o{ 1216a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o bh->b_dirty = 0; 1226a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o} 1236a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o 1243b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'ovoid brelse(struct buffer_head *bh) 1253b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 1263b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (bh->b_dirty) 1270e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o ll_rw_block(WRITE, 1, &bh); 1283b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o jfs_debug(3, "freeing block %lu/%p (total %d)\n", 12953ef44c40a3e425d2c700d8fd77a6b655aa121feTheodore Ts'o (unsigned long) bh->b_blocknr, (void *) bh, --bh_count); 1303b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o ext2fs_free_mem((void **) &bh); 1313b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 1323b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 1333b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'oint buffer_uptodate(struct buffer_head *bh) 1343b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 1353b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return bh->b_uptodate; 1363b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 1373b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 13815986f7931e1fe65621b4defb5522c9bf8da76efTheodore Ts'ovoid mark_buffer_uptodate(struct buffer_head *bh, int val) 13915986f7931e1fe65621b4defb5522c9bf8da76efTheodore Ts'o{ 14015986f7931e1fe65621b4defb5522c9bf8da76efTheodore Ts'o bh->b_uptodate = val; 14115986f7931e1fe65621b4defb5522c9bf8da76efTheodore Ts'o} 14215986f7931e1fe65621b4defb5522c9bf8da76efTheodore Ts'o 1433b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'ovoid wait_on_buffer(struct buffer_head *bh) 1443b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 1453b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (!bh->b_uptodate) 1460e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o ll_rw_block(READ, 1, &bh); 1473b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 1483b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 14980bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o 1503b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'ostatic void e2fsck_clear_recover(e2fsck_t ctx, int error) 1513b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 1525dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o ctx->fs->super->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER; 1533b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 1543b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o /* if we had an error doing journal recovery, we need a full fsck */ 1553b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (error) 1565dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o ctx->fs->super->s_state &= ~EXT2_VALID_FS; 1573b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o ext2fs_mark_super_dirty(ctx->fs); 1583b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 1593b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 1606a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'ostatic errcode_t e2fsck_journal_init_inode(e2fsck_t ctx, 1616a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o struct ext2_super_block *s, 1626a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o journal_t **journal) 1633b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 1643b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o struct inode *inode; 1653b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o struct buffer_head *bh; 1663b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o blk_t start; 1673b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o int retval; 1683b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 169adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o jfs_debug(1, "Using journal inode %u\n", s->s_journal_inum); 1703b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o *journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal"); 1713b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (!*journal) { 1723b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return EXT2_ET_NO_MEMORY; 1733b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 1743b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 1753b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o inode = e2fsck_allocate_memory(ctx, sizeof(*inode), "journal inode"); 1763b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (!inode) { 1773b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o retval = EXT2_ET_NO_MEMORY; 1783b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o goto exit_journal; 1793b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 1803b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 1813b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o inode->i_ctx = ctx; 182adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o inode->i_ino = s->s_journal_inum; 183adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o retval = ext2fs_read_inode(ctx->fs, s->s_journal_inum, &inode->i_ext2); 1843b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (retval) 1853b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o goto exit_inode; 1863b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 1873b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o (*journal)->j_dev = ctx; 1883b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o (*journal)->j_inode = inode; 1893b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o (*journal)->j_blocksize = ctx->fs->blocksize; 1903b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o (*journal)->j_maxlen = inode->i_ext2.i_size / (*journal)->j_blocksize; 191adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o ctx->journal_io = ctx->fs->io; 1923b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 1933b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (!inode->i_ext2.i_links_count || 1943b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o !LINUX_S_ISREG(inode->i_ext2.i_mode) || 1953b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o (*journal)->j_maxlen < JFS_MIN_JOURNAL_BLOCKS || 1963b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o (start = bmap(inode, 0)) == 0) { 1973b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o retval = EXT2_ET_BAD_INODE_NUM; 1983b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o goto exit_inode; 1993b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 2003b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 2013b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o bh = getblk(ctx, start, (*journal)->j_blocksize); 2023b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (!bh) { 2033b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o retval = EXT2_ET_NO_MEMORY; 2043b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o goto exit_inode; 2053b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 2063b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o (*journal)->j_sb_buffer = bh; 2073b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o (*journal)->j_superblock = (journal_superblock_t *)bh->b_data; 208adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o 2093b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return 0; 2103b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 2113b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'oexit_inode: 2123b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o ext2fs_free_mem((void **)&inode); 2133b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'oexit_journal: 2143b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o ext2fs_free_mem((void **)journal); 2153b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 2163b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return retval; 2173b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 2183b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 219adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'ostatic errcode_t e2fsck_journal_init_dev(e2fsck_t ctx, 220adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o struct ext2_super_block *s, 221adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o journal_t **journal) 2223b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 223adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o struct buffer_head *bh; 224adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o io_manager io_ptr; 225adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o blk_t start; 226adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o int retval; 227adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o int blocksize = ctx->fs->blocksize; 228adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o struct ext2_super_block jsuper; 2293b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o struct problem_context pctx; 2306d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o const char *journal_name; 2313b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 2323b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o clear_problem_context(&pctx); 2336d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o journal_name = ctx->journal_name; 2346d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o if (!journal_name) 2356d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o journal_name = ext2fs_find_block_device(s->s_journal_dev); 2363b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 2376d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o if (!journal_name) { 238adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o fix_problem(ctx, PR_0_CANT_FIND_JOURNAL, &pctx); 239adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return EXT2_ET_LOAD_EXT_JOURNAL; 2403b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 2413b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 2426d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o jfs_debug(1, "Using journal file %s\n", journal_name); 243adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o 244adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o#if 1 245adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o io_ptr = unix_io_manager; 246adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o#else 247adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o io_ptr = test_io_manager; 248adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o test_io_backing_manager = unix_io_manager; 249adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o#endif 2506d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o retval = io_ptr->open(journal_name, IO_FLAG_RW, &ctx->journal_io); 2516d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o if (!ctx->journal_name) 2526d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o free((void *) journal_name); 2536d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o if (retval) 254adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return retval; 255adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o 256adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o io_channel_set_blksize(ctx->journal_io, blocksize); 257adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o start = (blocksize == 1024) ? 1 : 0; 258adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o bh = getblk(ctx, start, blocksize); 259adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (!bh) 260adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return EXT2_ET_NO_MEMORY; 261adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o ll_rw_block(READ, 1, &bh); 262adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (bh->b_err) 263adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return bh->b_err; 264adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o memcpy(&jsuper, start ? bh->b_data : bh->b_data + 1024, 265adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o sizeof(jsuper)); 266adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o brelse(bh); 267adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o#ifdef EXT2FS_ENABLE_SWAPFS 268adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (jsuper.s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC)) 269adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o ext2fs_swap_super(&jsuper); 270adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o#endif 271adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (jsuper.s_magic != EXT2_SUPER_MAGIC || 272adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o !(jsuper.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { 273adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o fix_problem(ctx, PR_0_EXT_JOURNAL_BAD_SUPER, &pctx); 274adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return EXT2_ET_LOAD_EXT_JOURNAL; 2753b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 276adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o /* Make sure the journal UUID is correct */ 277adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (memcmp(jsuper.s_uuid, ctx->fs->super->s_journal_uuid, 278adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o sizeof(jsuper.s_uuid))) { 279adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o fix_problem(ctx, PR_0_JOURNAL_BAD_UUID, &pctx); 280adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return EXT2_ET_LOAD_EXT_JOURNAL; 281adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o } 282adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o 283adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o *journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal"); 284adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (!*journal) { 285adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return EXT2_ET_NO_MEMORY; 2863b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 2873b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 288adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o (*journal)->j_dev = ctx; 289adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o (*journal)->j_inode = NULL; 290adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o (*journal)->j_blocksize = ctx->fs->blocksize; 291adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o (*journal)->j_maxlen = jsuper.s_blocks_count; 292adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o 293adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o bh = getblk(ctx, start+1, (*journal)->j_blocksize); 294adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (!bh) { 295adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o retval = EXT2_ET_NO_MEMORY; 296adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o goto errout; 297adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o } 298adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o (*journal)->j_sb_buffer = bh; 299adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o (*journal)->j_superblock = (journal_superblock_t *)bh->b_data; 300adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o 301adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return 0; 302adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o 303adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'oerrout: 304adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o ext2fs_free_mem((void **)journal); 305adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return retval; 306adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o} 307adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o 308adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'ostatic errcode_t e2fsck_get_journal(e2fsck_t ctx, journal_t **journal) 309adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o{ 310adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o struct ext2_super_block *sb = ctx->fs->super; 311adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o 312adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (uuid_is_null(sb->s_journal_uuid)) { 313adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (!sb->s_journal_inum) 314adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return EXT2_ET_BAD_INODE_NUM; 315adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return e2fsck_journal_init_inode(ctx, sb, journal); 316adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o } else { 317adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return e2fsck_journal_init_dev(ctx, sb, journal); 318adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o } 3193b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 3203b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 3216a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'ostatic errcode_t e2fsck_journal_fix_bad_inode(e2fsck_t ctx, 3226a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o struct problem_context *pctx) 3233b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 3245dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o struct ext2_super_block *sb = ctx->fs->super; 3255dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o int recover = ctx->fs->super->s_feature_incompat & 3265dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o EXT3_FEATURE_INCOMPAT_RECOVER; 3275dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o int has_journal = ctx->fs->super->s_feature_compat & 3285dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o EXT3_FEATURE_COMPAT_HAS_JOURNAL; 3293b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 3305dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o if (has_journal || sb->s_journal_inum) { 3313b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o /* The journal inode is bogus, remove and force full fsck */ 3327e92dfae9e60947a20a2078b7871b073441dac44Theodore Ts'o pctx->ino = sb->s_journal_inum; 3333b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (fix_problem(ctx, PR_0_JOURNAL_BAD_INODE, pctx)) { 3345dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o if (has_journal && sb->s_journal_inum) 3353b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o printf("*** ext3 journal has been deleted - " 3363b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o "filesystem is now ext2 only ***\n\n"); 3375dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; 3385dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o sb->s_journal_inum = 0; 339424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o ctx->flags |= E2F_FLAG_JOURNAL_INODE; /* FIXME: todo */ 3403b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o e2fsck_clear_recover(ctx, 1); 3413b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return 0; 3423b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 3433b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return EXT2_ET_BAD_INODE_NUM; 3443b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } else if (recover) { 3453b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, pctx)) { 3463b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o e2fsck_clear_recover(ctx, 1); 3473b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return 0; 3483b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 3493b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return EXT2_ET_UNSUPP_FEATURE; 3503b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 3513b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return 0; 3523b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 3533b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 3546a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'ostatic errcode_t e2fsck_journal_load(journal_t *journal) 3553b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 3563b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o e2fsck_t ctx = journal->j_dev; 3573b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal_superblock_t *jsb; 3583b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o struct buffer_head *jbh = journal->j_sb_buffer; 3593b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o struct problem_context pctx; 3603b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 3613b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o clear_problem_context(&pctx); 3623b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 3630e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o ll_rw_block(READ, 1, &jbh); 3643b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (jbh->b_err) { 3653b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o com_err(ctx->device_name, jbh->b_err, 3663b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o _("reading journal superblock\n")); 3673b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return jbh->b_err; 3683b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 3693b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 3703b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o jsb = journal->j_superblock; 3713b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o /* If we don't even have JFS_MAGIC, we probably have a wrong inode */ 3723b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER)) 3733b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return e2fsck_journal_fix_bad_inode(ctx, &pctx); 3743b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 3750e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o switch (ntohl(jsb->s_header.h_blocktype)) { 3760e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o case JFS_SUPERBLOCK_V1: 3770e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o journal->j_format_version = 1; 3780e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o break; 3790e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 3800e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o case JFS_SUPERBLOCK_V2: 3810e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o journal->j_format_version = 2; 382adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o if (ntohl(jsb->s_nr_users) > 1) { 383adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o fix_problem(ctx, PR_0_JOURNAL_UNSUPP_MULTIFS, &pctx); 384adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o return EXT2_ET_JOURNAL_UNSUPP_VERSION; 385adee8d75db09dc8ecb2a32f59a8c64d3f4c64b0eTheodore Ts'o } 3860e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o break; 387c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o 388c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o /* 389c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o * These should never appear in a journal super block, so if 390c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o * they do, the journal is badly corrupted. 391c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o */ 392c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o case JFS_DESCRIPTOR_BLOCK: 393c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o case JFS_COMMIT_BLOCK: 394c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o case JFS_REVOKE_BLOCK: 395c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o return EXT2_ET_CORRUPT_SUPERBLOCK; 3960e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 3970e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o /* If we don't understand the superblock major type, but there 3980e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o * is a magic number, then it is likely to be a new format we 3990e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o * just don't understand, so leave it alone. */ 4000e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o default: 401c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o return EXT2_ET_JOURNAL_UNSUPP_VERSION; 4020e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o } 4030e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 4042f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o if (JFS_HAS_INCOMPAT_FEATURE(journal, ~JFS_KNOWN_INCOMPAT_FEATURES)) 4052f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o return EXT2_ET_UNSUPP_FEATURE; 406424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o 4072f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o if (JFS_HAS_RO_COMPAT_FEATURE(journal, ~JFS_KNOWN_ROCOMPAT_FEATURES)) 4082f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o return EXT2_ET_RO_UNSUPP_FEATURE; 4093b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 4100e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o /* We have now checked whether we know enough about the journal 4110e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o * format to be able to proceed safely, so any other checks that 4120e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o * fail we should attempt to recover from. */ 4130e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o if (jsb->s_blocksize != htonl(journal->j_blocksize)) { 4140e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, 4150e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o _("%s: no valid journal superblock found\n"), 4160e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o ctx->device_name); 4170e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o return EXT2_ET_CORRUPT_SUPERBLOCK; 4183b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 4193b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 4203b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (ntohl(jsb->s_maxlen) < journal->j_maxlen) 4213b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal->j_maxlen = ntohl(jsb->s_maxlen); 4223b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o else if (ntohl(jsb->s_maxlen) > journal->j_maxlen) { 4230e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, 4240e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o _("%s: journal too short\n"), 4250e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o ctx->device_name); 4263b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return EXT2_ET_CORRUPT_SUPERBLOCK; 4273b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 4283b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 4293b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal->j_tail_sequence = ntohl(jsb->s_sequence); 430ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o journal->j_transaction_sequence = journal->j_tail_sequence; 4313b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal->j_tail = ntohl(jsb->s_start); 4323b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal->j_first = ntohl(jsb->s_first); 4333b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal->j_last = ntohl(jsb->s_maxlen); 4343b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 4353b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return 0; 4363b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 4373b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 43853ef44c40a3e425d2c700d8fd77a6b655aa121feTheodore Ts'ostatic void e2fsck_journal_reset_super(e2fsck_t ctx, journal_superblock_t *jsb, 4396a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o journal_t *journal) 4403b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 4410e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o char *p; 442424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o union { 443424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o uuid_t uuid; 444424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o __u32 val[4]; 445424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o } u; 446424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o __u32 new_seq = 0; 447424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o int i; 448424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o 4490e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o /* Leave a valid existing V1 superblock signature alone. 4500e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o * Anything unrecognisable we overwrite with a new V2 4510e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o * signature. */ 4520e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 4530e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER) || 4540e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o jsb->s_header.h_blocktype != htonl(JFS_SUPERBLOCK_V1)) { 4550e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER); 4560e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2); 4570e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o } 4580e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 4590e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o /* Zero out everything else beyond the superblock header */ 4600e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 4610e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o p = ((char *) jsb) + sizeof(journal_header_t); 4620e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o memset (p, 0, ctx->fs->blocksize-sizeof(journal_header_t)); 4630e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 4643b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o jsb->s_blocksize = htonl(ctx->fs->blocksize); 4650e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o jsb->s_maxlen = htonl(journal->j_maxlen); 4660e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o jsb->s_first = htonl(1); 4670e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 468424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o /* Initialize the journal sequence number so that there is "no" 469424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o * chance we will find old "valid" transactions in the journal. 470424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o * This avoids the need to zero the whole journal (slow to do, 471424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o * and risky when we are just recovering the filesystem). 472424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o */ 473424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o uuid_generate(u.uuid); 474424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o for (i = 0; i < 4; i ++) 475424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o new_seq ^= u.val[i]; 476424cd2beb7c40a3e4cf96b5bf28b24e48554a754Theodore Ts'o jsb->s_sequence = htonl(new_seq); 4770e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 478c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o mark_buffer_dirty(journal->j_sb_buffer, 1); 4790e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o ll_rw_block(WRITE, 1, &journal->j_sb_buffer); 4803b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 4813b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 4826a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'ostatic errcode_t e2fsck_journal_fix_corrupt_super(e2fsck_t ctx, 4836a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o journal_t *journal, 4846a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o struct problem_context *pctx) 4853b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 4865dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o struct ext2_super_block *sb = ctx->fs->super; 4875dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o int recover = ctx->fs->super->s_feature_incompat & 4885dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o EXT3_FEATURE_INCOMPAT_RECOVER; 4893b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 4903b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o pctx->num = journal->j_inode->i_ino; 4913b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 4925dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) { 4933b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (fix_problem(ctx, PR_0_JOURNAL_BAD_SUPER, pctx)) { 494b2f93192a1701855d4f5f05f0087c45e92a35681Theodore Ts'o e2fsck_journal_reset_super(ctx, journal->j_superblock, 495b2f93192a1701855d4f5f05f0087c45e92a35681Theodore Ts'o journal); 4963b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal->j_transaction_sequence = 1; 4973b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o e2fsck_clear_recover(ctx, recover); 4983b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return 0; 4993b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 5003b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return EXT2_ET_CORRUPT_SUPERBLOCK; 5013b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } else if (e2fsck_journal_fix_bad_inode(ctx, pctx)) 5023b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return EXT2_ET_CORRUPT_SUPERBLOCK; 5033b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5043b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return 0; 5053b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 5063b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5076a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'ostatic void e2fsck_journal_release(e2fsck_t ctx, journal_t *journal, 5086a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o int reset, int drop) 5093b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 5103b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal_superblock_t *jsb; 5113b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5126a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o if (drop) 5136a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o mark_buffer_clean(journal->j_sb_buffer); 5146a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o else if (!(ctx->options & E2F_OPT_READONLY)) { 5153b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o jsb = journal->j_superblock; 5163b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o jsb->s_sequence = htonl(journal->j_transaction_sequence); 5173b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (reset) 5183b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o jsb->s_start = 0; /* this marks the journal as empty */ 5193b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o mark_buffer_dirty(journal->j_sb_buffer, 1); 5203b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 5213b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o brelse(journal->j_sb_buffer); 5223b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5236d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o if (ctx->journal_io) { 5246d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o if (ctx->fs && ctx->fs->io != ctx->journal_io) 5256d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o io_channel_close(ctx->journal_io); 5266d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o ctx->journal_io = 0; 5276d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o } 5286d222f3217b11c9b27f92b4aafe47bfeb59b81faTheodore Ts'o 5293b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (journal->j_inode) 5306a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o ext2fs_free_mem((void **)&journal->j_inode); 5313b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o ext2fs_free_mem((void **)&journal); 5323b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 5333b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5349b5657591b1db9b82fe433f3f90e496f3df6a851Theodore Ts'o/* 5359b5657591b1db9b82fe433f3f90e496f3df6a851Theodore Ts'o * This function makes sure that the superblock fields regarding the 5369b5657591b1db9b82fe433f3f90e496f3df6a851Theodore Ts'o * journal are consistent. 5379b5657591b1db9b82fe433f3f90e496f3df6a851Theodore Ts'o */ 5383b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'oint e2fsck_check_ext3_journal(e2fsck_t ctx) 5393b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 5405dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o struct ext2_super_block *sb = ctx->fs->super; 5413b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal_t *journal; 5425dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o int recover = ctx->fs->super->s_feature_incompat & 5435dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o EXT3_FEATURE_INCOMPAT_RECOVER; 5443b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o struct problem_context pctx; 545d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o int reset = 0, force_fsck = 0; 5463b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o int retval; 5473b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5483b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o /* If we don't have any journal features, don't do anything more */ 5495dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) && 5505dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o !recover && sb->s_journal_inum == 0 && sb->s_journal_dev == 0 && 5515dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o uuid_is_null(sb->s_journal_uuid)) 5529b5657591b1db9b82fe433f3f90e496f3df6a851Theodore Ts'o return 0; 5533b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5543b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o clear_problem_context(&pctx); 5555dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o pctx.num = sb->s_journal_inum; 5563b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5573b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o retval = e2fsck_get_journal(ctx, &journal); 5583b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (retval) { 5593b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (retval == EXT2_ET_BAD_INODE_NUM) 5603b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return e2fsck_journal_fix_bad_inode(ctx, &pctx); 5613b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return retval; 5623b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 5633b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5643b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o retval = e2fsck_journal_load(journal); 5653b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (retval) { 566c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) || 5672f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o ((retval == EXT2_ET_UNSUPP_FEATURE) && 5682f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_INCOMPAT, 5692f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o &pctx))) || 5702f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o ((retval == EXT2_ET_RO_UNSUPP_FEATURE) && 5712f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_ROCOMPAT, 5722f686ace1c8e2f680ffd450d143cdd01a649687aTheodore Ts'o &pctx))) || 573c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o ((retval == EXT2_ET_JOURNAL_UNSUPP_VERSION) && 574c7f23364fd6d8d25d74e51ba5f342fc2230048d8Theodore Ts'o (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_VERSION, &pctx)))) 5756a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o retval = e2fsck_journal_fix_corrupt_super(ctx, journal, 5766a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o &pctx); 5776a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o e2fsck_journal_release(ctx, journal, 0, 1); 5783b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return retval; 5793b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 5803b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 5813b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o /* 5823b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * We want to make the flags consistent here. We will not leave with 5833b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * needs_recovery set but has_journal clear. We can't get in a loop 5843b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o * with -y, -n, or -p, only if a user isn't making up their mind. 5853b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o */ 5863b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'ono_has_journal: 5875dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { 5885dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o recover = sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER; 5893b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o pctx.str = "inode"; 5903b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (fix_problem(ctx, PR_0_JOURNAL_HAS_JOURNAL, &pctx)) { 5913b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (recover && 5923b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o !fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, &pctx)) 5933b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o goto no_has_journal; 594d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o /* 595d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * Need a full fsck if we are releasing a 5968c2dc52180373f4e7b12e92669db59b1a52e2153Theodore Ts'o * journal stored on a reserved inode. 597d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o */ 598d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o force_fsck = recover || 599d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o (sb->s_journal_inum < EXT2_FIRST_INODE(sb)); 600d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o /* Clear all of the journal fields */ 6015dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o sb->s_journal_inum = 0; 602d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o sb->s_journal_dev = 0; 603d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o memset(sb->s_journal_uuid, 0, 604d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o sizeof(sb->s_journal_uuid)); 605d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o e2fsck_clear_recover(ctx, force_fsck); 6063b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } else if (!(ctx->options & E2F_OPT_READONLY)) { 6075dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o sb->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; 6083b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o ext2fs_mark_super_dirty(ctx->fs); 6093b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 6103b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 6113b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 6125dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL && 6135dd8f963d04fa4099a003cb3b13ffae05ab29210Theodore Ts'o !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) && 6143b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal->j_superblock->s_start != 0) { 615d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o if (fix_problem(ctx, PR_0_JOURNAL_RESET_JOURNAL, &pctx)) { 6163b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o reset = 1; 617d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o sb->s_state &= ~EXT2_VALID_FS; 618d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o ext2fs_mark_super_dirty(ctx->fs); 619d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o } 620d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o /* 621d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * If the user answers no to the above question, we 622d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * ignore the fact that journal apparently has data; 623d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * accidentally replaying over valid data would be far 624d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * worse than skipping a questionable recovery. 625d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * 626d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * XXX should we abort with a fatal error here? What 627d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * will the ext3 kernel code do if a filesystem with 628d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * !NEEDS_RECOVERY but with a non-zero 629d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o * journal->j_superblock->s_start is mounted? 630d3f35b645154ea65ff7c955c862a796e2f281927Theodore Ts'o */ 6313b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o } 6323b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 6336a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o e2fsck_journal_release(ctx, journal, reset, 0); 6343b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return retval; 6353b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 6363b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 6376a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'ostatic errcode_t recover_ext3_journal(e2fsck_t ctx) 6383b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o{ 6393b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o journal_t *journal; 6403b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o int retval; 6413b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 6423b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o retval = e2fsck_get_journal(ctx, &journal); 6433b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (retval) 644ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o return retval; 645ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o 6463b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o retval = e2fsck_journal_load(journal); 6473b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o if (retval) 6486a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o goto errout; 6493b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 6500e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o retval = journal_init_revoke(journal, 1024); 6510e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o if (retval) 6526a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o goto errout; 6530e8a9560d89dd9cca73037a59efa93e46abdccdaTheodore Ts'o 6543b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o retval = -journal_recover(journal); 6556a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'oerrout: 6566a6d3d44d6e90539007b8d32e6cb76f62a4af163Theodore Ts'o e2fsck_journal_release(ctx, journal, 1, 0); 6573b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o return retval; 6583b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o} 6593b5386dca8e0008e13351be5de6323576329aa58Theodore Ts'o 66080bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'oint e2fsck_run_ext3_journal(e2fsck_t ctx) 66180bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o{ 66280bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o io_manager io_ptr = ctx->fs->io->manager; 66380bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o int blocksize = ctx->fs->blocksize; 664ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o errcode_t retval, recover_retval; 6658394902e04e64ed10ca81e869892c00143ee4931Theodore Ts'o 6668394902e04e64ed10ca81e869892c00143ee4931Theodore Ts'o printf(_("%s: recovering journal\n"), ctx->device_name); 667ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o if (ctx->options & E2F_OPT_READONLY) { 6688394902e04e64ed10ca81e869892c00143ee4931Theodore Ts'o printf(_("%s: won't do journal recovery while read-only\n"), 669ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o ctx->device_name); 670ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o return EXT2_ET_FILE_RO; 671ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o } 672ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o 6730f2cfe25796bd53b920b1607410bf94251f17fbcTheodore Ts'o if (ctx->fs->flags & EXT2_FLAG_DIRTY) 6743c6b8977d44c66f0a50dd77c18a78b57b1022f8cTheodore Ts'o ext2fs_flush(ctx->fs); /* Force out any modifications */ 675d051521278790e5fc7d97d59bb3be6b662a76365Theodore Ts'o 676ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o recover_retval = recover_ext3_journal(ctx); 67780bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o 67880bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o /* 67980bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o * Reload the filesystem context to get up-to-date data from disk 68080bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o * because journal recovery will change the filesystem under us. 68180bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o */ 68280bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o ext2fs_close(ctx->fs); 683ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o retval = ext2fs_open(ctx->filesystem_name, EXT2_FLAG_RW, 68480bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o ctx->superblock, blocksize, io_ptr, 68580bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o &ctx->fs); 68680bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o 68780bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o if (retval) { 68880bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o com_err(ctx->program_name, retval, 68980bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o _("while trying to re-open %s"), 69080bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o ctx->device_name); 69199a2cc969fb47e8c87965aa9fb93cabf6fe4ac1eTheodore Ts'o fatal_error(ctx, 0); 69280bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o } 69380bfaa3e40ae6ab00cc3d4d1f4c0eeefce0b1a96Theodore Ts'o ctx->fs->priv_data = ctx; 69417390c047f5470eec005c5461a7926d03d6bbbe7Theodore Ts'o 695ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o /* Set the superblock flags */ 696ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o e2fsck_clear_recover(ctx, recover_retval); 697ecf1b7767e1772f4c6dba8f02026057ed05397bdTheodore Ts'o return recover_retval; 69817390c047f5470eec005c5461a7926d03d6bbbe7Theodore Ts'o} 699