diff options
Diffstat (limited to 'e2fsprogs/e2fsck/journal.c')
| -rw-r--r-- | e2fsprogs/e2fsck/journal.c | 960 |
1 files changed, 0 insertions, 960 deletions
diff --git a/e2fsprogs/e2fsck/journal.c b/e2fsprogs/e2fsck/journal.c deleted file mode 100644 index 14e774d50..000000000 --- a/e2fsprogs/e2fsck/journal.c +++ /dev/null @@ -1,960 +0,0 @@ -/* - * journal.c --- code for handling the "ext3" journal - * - * Copyright (C) 2000 Andreas Dilger - * Copyright (C) 2000 Theodore Ts'o - * - * Parts of the code are based on fs/jfs/journal.c by Stephen C. Tweedie - * Copyright (C) 1999 Red Hat Software - * - * This file may be redistributed under the terms of the - * GNU General Public License version 2 or at your discretion - * any later version. - */ - -#ifdef HAVE_SYS_MOUNT_H -#include <sys/param.h> -#include <sys/mount.h> -#define MNT_FL (MS_MGC_VAL | MS_RDONLY) -#endif -#ifdef HAVE_SYS_STAT_H -#include <sys/stat.h> -#endif - -#define E2FSCK_INCLUDE_INLINE_FUNCS -#include "jfs_user.h" -#include "problem.h" -#include "uuid/uuid.h" - -#ifdef __CONFIG_JBD_DEBUG__E2FS /* Enabled by configure --enable-jfs-debug */ -static int bh_count = 0; -#endif - -/* - * Define USE_INODE_IO to use the inode_io.c / fileio.c codepaths. - * This creates a larger static binary, and a smaller binary using - * shared libraries. It's also probably slightly less CPU-efficient, - * which is why it's not on by default. But, it's a good way of - * testing the functions in inode_io.c and fileio.c. - */ -#undef USE_INODE_IO - -/* Kernel compatibility functions for handling the journal. These allow us - * to use the recovery.c file virtually unchanged from the kernel, so we - * don't have to do much to keep kernel and user recovery in sync. - */ -int journal_bmap(journal_t *journal, blk_t block, unsigned long *phys) -{ -#ifdef USE_INODE_IO - *phys = block; - return 0; -#else - struct inode *inode = journal->j_inode; - errcode_t retval; - blk_t pblk; - - if (!inode) { - *phys = block; - return 0; - } - - retval= ext2fs_bmap(inode->i_ctx->fs, inode->i_ino, - &inode->i_ext2, NULL, 0, block, &pblk); - *phys = pblk; - return (retval); -#endif -} - -struct buffer_head *getblk(kdev_t kdev, blk_t blocknr, int blocksize) -{ - struct buffer_head *bh; - - bh = e2fsck_allocate_memory(kdev->k_ctx, sizeof(*bh), "block buffer"); - if (!bh) - return NULL; - - jfs_debug(4, "getblk for block %lu (%d bytes)(total %d)\n", - (unsigned long) blocknr, blocksize, ++bh_count); - - bh->b_ctx = kdev->k_ctx; - if (kdev->k_dev == K_DEV_FS) - bh->b_io = kdev->k_ctx->fs->io; - else - bh->b_io = kdev->k_ctx->journal_io; - bh->b_size = blocksize; - bh->b_blocknr = blocknr; - - return bh; -} - -void sync_blockdev(kdev_t kdev) -{ - io_channel io; - - if (kdev->k_dev == K_DEV_FS) - io = kdev->k_ctx->fs->io; - else - io = kdev->k_ctx->journal_io; - - io_channel_flush(io); -} - -void ll_rw_block(int rw, int nr, struct buffer_head *bhp[]) -{ - int retval; - struct buffer_head *bh; - - for (; nr > 0; --nr) { - bh = *bhp++; - if (rw == READ && !bh->b_uptodate) { - jfs_debug(3, "reading block %lu/%p\n", - (unsigned long) bh->b_blocknr, (void *) bh); - retval = io_channel_read_blk(bh->b_io, - bh->b_blocknr, - 1, bh->b_data); - if (retval) { - com_err(bh->b_ctx->device_name, retval, - "while reading block %lu\n", - (unsigned long) bh->b_blocknr); - bh->b_err = retval; - continue; - } - bh->b_uptodate = 1; - } else if (rw == WRITE && bh->b_dirty) { - jfs_debug(3, "writing block %lu/%p\n", - (unsigned long) bh->b_blocknr, (void *) bh); - retval = io_channel_write_blk(bh->b_io, - bh->b_blocknr, - 1, bh->b_data); - if (retval) { - com_err(bh->b_ctx->device_name, retval, - "while writing block %lu\n", - (unsigned long) bh->b_blocknr); - bh->b_err = retval; - continue; - } - bh->b_dirty = 0; - bh->b_uptodate = 1; - } else { - jfs_debug(3, "no-op %s for block %lu\n", - rw == READ ? "read" : "write", - (unsigned long) bh->b_blocknr); - } - } -} - -void mark_buffer_dirty(struct buffer_head *bh) -{ - bh->b_dirty = 1; -} - -static void mark_buffer_clean(struct buffer_head * bh) -{ - bh->b_dirty = 0; -} - -void brelse(struct buffer_head *bh) -{ - if (bh->b_dirty) - ll_rw_block(WRITE, 1, &bh); - jfs_debug(3, "freeing block %lu/%p (total %d)\n", - (unsigned long) bh->b_blocknr, (void *) bh, --bh_count); - ext2fs_free_mem(&bh); -} - -int buffer_uptodate(struct buffer_head *bh) -{ - return bh->b_uptodate; -} - -void mark_buffer_uptodate(struct buffer_head *bh, int val) -{ - bh->b_uptodate = val; -} - -void wait_on_buffer(struct buffer_head *bh) -{ - if (!bh->b_uptodate) - ll_rw_block(READ, 1, &bh); -} - - -static void e2fsck_clear_recover(e2fsck_t ctx, int error) -{ - ctx->fs->super->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER; - - /* if we had an error doing journal recovery, we need a full fsck */ - if (error) - ctx->fs->super->s_state &= ~EXT2_VALID_FS; - ext2fs_mark_super_dirty(ctx->fs); -} - -static errcode_t e2fsck_get_journal(e2fsck_t ctx, journal_t **ret_journal) -{ - struct ext2_super_block *sb = ctx->fs->super; - struct ext2_super_block jsuper; - struct problem_context pctx; - struct buffer_head *bh; - struct inode *j_inode = NULL; - struct kdev_s *dev_fs = NULL, *dev_journal; - const char *journal_name = 0; - journal_t *journal = NULL; - errcode_t retval = 0; - io_manager io_ptr = 0; - unsigned long start = 0; - blk_t blk; - int ext_journal = 0; - int tried_backup_jnl = 0; - int i; - - clear_problem_context(&pctx); - - journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal"); - if (!journal) { - return EXT2_ET_NO_MEMORY; - } - - dev_fs = e2fsck_allocate_memory(ctx, 2*sizeof(struct kdev_s), "kdev"); - if (!dev_fs) { - retval = EXT2_ET_NO_MEMORY; - goto errout; - } - dev_journal = dev_fs+1; - - dev_fs->k_ctx = dev_journal->k_ctx = ctx; - dev_fs->k_dev = K_DEV_FS; - dev_journal->k_dev = K_DEV_JOURNAL; - - journal->j_dev = dev_journal; - journal->j_fs_dev = dev_fs; - journal->j_inode = NULL; - journal->j_blocksize = ctx->fs->blocksize; - - if (uuid_is_null(sb->s_journal_uuid)) { - if (!sb->s_journal_inum) - return EXT2_ET_BAD_INODE_NUM; - j_inode = e2fsck_allocate_memory(ctx, sizeof(*j_inode), - "journal inode"); - if (!j_inode) { - retval = EXT2_ET_NO_MEMORY; - goto errout; - } - - j_inode->i_ctx = ctx; - j_inode->i_ino = sb->s_journal_inum; - - if ((retval = ext2fs_read_inode(ctx->fs, - sb->s_journal_inum, - &j_inode->i_ext2))) { - try_backup_journal: - if (sb->s_jnl_backup_type != EXT3_JNL_BACKUP_BLOCKS || - tried_backup_jnl) - goto errout; - memset(&j_inode->i_ext2, 0, sizeof(struct ext2_inode)); - memcpy(&j_inode->i_ext2.i_block[0], sb->s_jnl_blocks, - EXT2_N_BLOCKS*4); - j_inode->i_ext2.i_size = sb->s_jnl_blocks[16]; - j_inode->i_ext2.i_links_count = 1; - j_inode->i_ext2.i_mode = LINUX_S_IFREG | 0600; - tried_backup_jnl++; - } - if (!j_inode->i_ext2.i_links_count || - !LINUX_S_ISREG(j_inode->i_ext2.i_mode)) { - retval = EXT2_ET_NO_JOURNAL; - goto try_backup_journal; - } - if (j_inode->i_ext2.i_size / journal->j_blocksize < - JFS_MIN_JOURNAL_BLOCKS) { - retval = EXT2_ET_JOURNAL_TOO_SMALL; - goto try_backup_journal; - } - for (i=0; i < EXT2_N_BLOCKS; i++) { - blk = j_inode->i_ext2.i_block[i]; - if (!blk) { - if (i < EXT2_NDIR_BLOCKS) { - retval = EXT2_ET_JOURNAL_TOO_SMALL; - goto try_backup_journal; - } - continue; - } - if (blk < sb->s_first_data_block || - blk >= sb->s_blocks_count) { - retval = EXT2_ET_BAD_BLOCK_NUM; - goto try_backup_journal; - } - } - journal->j_maxlen = j_inode->i_ext2.i_size / journal->j_blocksize; - -#ifdef USE_INODE_IO - retval = ext2fs_inode_io_intern2(ctx->fs, sb->s_journal_inum, - &j_inode->i_ext2, - &journal_name); - if (retval) - goto errout; - - io_ptr = inode_io_manager; -#else - journal->j_inode = j_inode; - ctx->journal_io = ctx->fs->io; - if ((retval = journal_bmap(journal, 0, &start)) != 0) - goto errout; -#endif - } else { - ext_journal = 1; - if (!ctx->journal_name) { - char uuid[37]; - - uuid_unparse(sb->s_journal_uuid, uuid); - ctx->journal_name = blkid_get_devname(ctx->blkid, - "UUID", uuid); - if (!ctx->journal_name) - ctx->journal_name = blkid_devno_to_devname(sb->s_journal_dev); - } - journal_name = ctx->journal_name; - - if (!journal_name) { - fix_problem(ctx, PR_0_CANT_FIND_JOURNAL, &pctx); - return EXT2_ET_LOAD_EXT_JOURNAL; - } - - jfs_debug(1, "Using journal file %s\n", journal_name); - io_ptr = unix_io_manager; - } - -#if 0 - test_io_backing_manager = io_ptr; - io_ptr = test_io_manager; -#endif -#ifndef USE_INODE_IO - if (ext_journal) -#endif - retval = io_ptr->open(journal_name, IO_FLAG_RW, - &ctx->journal_io); - if (retval) - goto errout; - - io_channel_set_blksize(ctx->journal_io, ctx->fs->blocksize); - - if (ext_journal) { - if (ctx->fs->blocksize == 1024) - start = 1; - bh = getblk(dev_journal, start, ctx->fs->blocksize); - if (!bh) { - retval = EXT2_ET_NO_MEMORY; - goto errout; - } - ll_rw_block(READ, 1, &bh); - if ((retval = bh->b_err) != 0) - goto errout; - memcpy(&jsuper, start ? bh->b_data : bh->b_data + 1024, - sizeof(jsuper)); - brelse(bh); -#ifdef EXT2FS_ENABLE_SWAPFS - if (jsuper.s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC)) - ext2fs_swap_super(&jsuper); -#endif - if (jsuper.s_magic != EXT2_SUPER_MAGIC || - !(jsuper.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { - fix_problem(ctx, PR_0_EXT_JOURNAL_BAD_SUPER, &pctx); - retval = EXT2_ET_LOAD_EXT_JOURNAL; - goto errout; - } - /* Make sure the journal UUID is correct */ - if (memcmp(jsuper.s_uuid, ctx->fs->super->s_journal_uuid, - sizeof(jsuper.s_uuid))) { - fix_problem(ctx, PR_0_JOURNAL_BAD_UUID, &pctx); - retval = EXT2_ET_LOAD_EXT_JOURNAL; - goto errout; - } - - journal->j_maxlen = jsuper.s_blocks_count; - start++; - } - - if (!(bh = getblk(dev_journal, start, journal->j_blocksize))) { - retval = EXT2_ET_NO_MEMORY; - goto errout; - } - - journal->j_sb_buffer = bh; - journal->j_superblock = (journal_superblock_t *)bh->b_data; - -#ifdef USE_INODE_IO - if (j_inode) - ext2fs_free_mem(&j_inode); -#endif - - *ret_journal = journal; - return 0; - -errout: - if (dev_fs) - ext2fs_free_mem(&dev_fs); - if (j_inode) - ext2fs_free_mem(&j_inode); - if (journal) - ext2fs_free_mem(&journal); - return retval; - -} - -static errcode_t e2fsck_journal_fix_bad_inode(e2fsck_t ctx, - struct problem_context *pctx) -{ - struct ext2_super_block *sb = ctx->fs->super; - int recover = ctx->fs->super->s_feature_incompat & - EXT3_FEATURE_INCOMPAT_RECOVER; - int has_journal = ctx->fs->super->s_feature_compat & - EXT3_FEATURE_COMPAT_HAS_JOURNAL; - - if (has_journal || sb->s_journal_inum) { - /* The journal inode is bogus, remove and force full fsck */ - pctx->ino = sb->s_journal_inum; - if (fix_problem(ctx, PR_0_JOURNAL_BAD_INODE, pctx)) { - if (has_journal && sb->s_journal_inum) - printf("*** ext3 journal has been deleted - " - "filesystem is now ext2 only ***\n\n"); - sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; - sb->s_journal_inum = 0; - ctx->flags |= E2F_FLAG_JOURNAL_INODE; /* FIXME: todo */ - e2fsck_clear_recover(ctx, 1); - return 0; - } - return EXT2_ET_BAD_INODE_NUM; - } else if (recover) { - if (fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, pctx)) { - e2fsck_clear_recover(ctx, 1); - return 0; - } - return EXT2_ET_UNSUPP_FEATURE; - } - return 0; -} - -#define V1_SB_SIZE 0x0024 -static void clear_v2_journal_fields(journal_t *journal) -{ - e2fsck_t ctx = journal->j_dev->k_ctx; - struct problem_context pctx; - - clear_problem_context(&pctx); - - if (!fix_problem(ctx, PR_0_CLEAR_V2_JOURNAL, &pctx)) - return; - - memset(((char *) journal->j_superblock) + V1_SB_SIZE, 0, - ctx->fs->blocksize-V1_SB_SIZE); - mark_buffer_dirty(journal->j_sb_buffer); -} - - -static errcode_t e2fsck_journal_load(journal_t *journal) -{ - e2fsck_t ctx = journal->j_dev->k_ctx; - journal_superblock_t *jsb; - struct buffer_head *jbh = journal->j_sb_buffer; - struct problem_context pctx; - - clear_problem_context(&pctx); - - ll_rw_block(READ, 1, &jbh); - if (jbh->b_err) { - com_err(ctx->device_name, jbh->b_err, - _("reading journal superblock\n")); - return jbh->b_err; - } - - jsb = journal->j_superblock; - /* If we don't even have JFS_MAGIC, we probably have a wrong inode */ - if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER)) - return e2fsck_journal_fix_bad_inode(ctx, &pctx); - - switch (ntohl(jsb->s_header.h_blocktype)) { - case JFS_SUPERBLOCK_V1: - journal->j_format_version = 1; - if (jsb->s_feature_compat || - jsb->s_feature_incompat || - jsb->s_feature_ro_compat || - jsb->s_nr_users) - clear_v2_journal_fields(journal); - break; - - case JFS_SUPERBLOCK_V2: - journal->j_format_version = 2; - if (ntohl(jsb->s_nr_users) > 1 && - uuid_is_null(ctx->fs->super->s_journal_uuid)) - clear_v2_journal_fields(journal); - if (ntohl(jsb->s_nr_users) > 1) { - fix_problem(ctx, PR_0_JOURNAL_UNSUPP_MULTIFS, &pctx); - return EXT2_ET_JOURNAL_UNSUPP_VERSION; - } - break; - - /* - * These should never appear in a journal super block, so if - * they do, the journal is badly corrupted. - */ - case JFS_DESCRIPTOR_BLOCK: - case JFS_COMMIT_BLOCK: - case JFS_REVOKE_BLOCK: - return EXT2_ET_CORRUPT_SUPERBLOCK; - - /* If we don't understand the superblock major type, but there - * is a magic number, then it is likely to be a new format we - * just don't understand, so leave it alone. */ - default: - return EXT2_ET_JOURNAL_UNSUPP_VERSION; - } - - if (JFS_HAS_INCOMPAT_FEATURE(journal, ~JFS_KNOWN_INCOMPAT_FEATURES)) - return EXT2_ET_UNSUPP_FEATURE; - - if (JFS_HAS_RO_COMPAT_FEATURE(journal, ~JFS_KNOWN_ROCOMPAT_FEATURES)) - return EXT2_ET_RO_UNSUPP_FEATURE; - - /* We have now checked whether we know enough about the journal - * format to be able to proceed safely, so any other checks that - * fail we should attempt to recover from. */ - if (jsb->s_blocksize != htonl(journal->j_blocksize)) { - com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, - _("%s: no valid journal superblock found\n"), - ctx->device_name); - return EXT2_ET_CORRUPT_SUPERBLOCK; - } - - if (ntohl(jsb->s_maxlen) < journal->j_maxlen) - journal->j_maxlen = ntohl(jsb->s_maxlen); - else if (ntohl(jsb->s_maxlen) > journal->j_maxlen) { - com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, - _("%s: journal too short\n"), - ctx->device_name); - return EXT2_ET_CORRUPT_SUPERBLOCK; - } - - journal->j_tail_sequence = ntohl(jsb->s_sequence); - journal->j_transaction_sequence = journal->j_tail_sequence; - journal->j_tail = ntohl(jsb->s_start); - journal->j_first = ntohl(jsb->s_first); - journal->j_last = ntohl(jsb->s_maxlen); - - return 0; -} - -static void e2fsck_journal_reset_super(e2fsck_t ctx, journal_superblock_t *jsb, - journal_t *journal) -{ - char *p; - union { - uuid_t uuid; - __u32 val[4]; - } u; - __u32 new_seq = 0; - int i; - - /* Leave a valid existing V1 superblock signature alone. - * Anything unrecognisable we overwrite with a new V2 - * signature. */ - - if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER) || - jsb->s_header.h_blocktype != htonl(JFS_SUPERBLOCK_V1)) { - jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER); - jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2); - } - - /* Zero out everything else beyond the superblock header */ - - p = ((char *) jsb) + sizeof(journal_header_t); - memset (p, 0, ctx->fs->blocksize-sizeof(journal_header_t)); - - jsb->s_blocksize = htonl(ctx->fs->blocksize); - jsb->s_maxlen = htonl(journal->j_maxlen); - jsb->s_first = htonl(1); - - /* Initialize the journal sequence number so that there is "no" - * chance we will find old "valid" transactions in the journal. - * This avoids the need to zero the whole journal (slow to do, - * and risky when we are just recovering the filesystem). - */ - uuid_generate(u.uuid); - for (i = 0; i < 4; i ++) - new_seq ^= u.val[i]; - jsb->s_sequence = htonl(new_seq); - - mark_buffer_dirty(journal->j_sb_buffer); - ll_rw_block(WRITE, 1, &journal->j_sb_buffer); -} - -static errcode_t e2fsck_journal_fix_corrupt_super(e2fsck_t ctx, - journal_t *journal, - struct problem_context *pctx) -{ - struct ext2_super_block *sb = ctx->fs->super; - int recover = ctx->fs->super->s_feature_incompat & - EXT3_FEATURE_INCOMPAT_RECOVER; - - if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) { - if (fix_problem(ctx, PR_0_JOURNAL_BAD_SUPER, pctx)) { - e2fsck_journal_reset_super(ctx, journal->j_superblock, - journal); - journal->j_transaction_sequence = 1; - e2fsck_clear_recover(ctx, recover); - return 0; - } - return EXT2_ET_CORRUPT_SUPERBLOCK; - } else if (e2fsck_journal_fix_bad_inode(ctx, pctx)) - return EXT2_ET_CORRUPT_SUPERBLOCK; - - return 0; -} - -static void e2fsck_journal_release(e2fsck_t ctx, journal_t *journal, - int reset, int drop) -{ - journal_superblock_t *jsb; - - if (drop) - mark_buffer_clean(journal->j_sb_buffer); - else if (!(ctx->options & E2F_OPT_READONLY)) { - jsb = journal->j_superblock; - jsb->s_sequence = htonl(journal->j_transaction_sequence); - if (reset) - jsb->s_start = 0; /* this marks the journal as empty */ - mark_buffer_dirty(journal->j_sb_buffer); - } - brelse(journal->j_sb_buffer); - - if (ctx->journal_io) { - if (ctx->fs && ctx->fs->io != ctx->journal_io) - io_channel_close(ctx->journal_io); - ctx->journal_io = 0; - } - -#ifndef USE_INODE_IO - if (journal->j_inode) - ext2fs_free_mem(&journal->j_inode); -#endif - if (journal->j_fs_dev) - ext2fs_free_mem(&journal->j_fs_dev); - ext2fs_free_mem(&journal); -} - -/* - * This function makes sure that the superblock fields regarding the - * journal are consistent. - */ -int e2fsck_check_ext3_journal(e2fsck_t ctx) -{ - struct ext2_super_block *sb = ctx->fs->super; - journal_t *journal; - int recover = ctx->fs->super->s_feature_incompat & - EXT3_FEATURE_INCOMPAT_RECOVER; - struct problem_context pctx; - problem_t problem; - int reset = 0, force_fsck = 0; - int retval; - - /* If we don't have any journal features, don't do anything more */ - if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) && - !recover && sb->s_journal_inum == 0 && sb->s_journal_dev == 0 && - uuid_is_null(sb->s_journal_uuid)) - return 0; - - clear_problem_context(&pctx); - pctx.num = sb->s_journal_inum; - - retval = e2fsck_get_journal(ctx, &journal); - if (retval) { - if ((retval == EXT2_ET_BAD_INODE_NUM) || - (retval == EXT2_ET_BAD_BLOCK_NUM) || - (retval == EXT2_ET_JOURNAL_TOO_SMALL) || - (retval == EXT2_ET_NO_JOURNAL)) - return e2fsck_journal_fix_bad_inode(ctx, &pctx); - return retval; - } - - retval = e2fsck_journal_load(journal); - if (retval) { - if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) || - ((retval == EXT2_ET_UNSUPP_FEATURE) && - (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_INCOMPAT, - &pctx))) || - ((retval == EXT2_ET_RO_UNSUPP_FEATURE) && - (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_ROCOMPAT, - &pctx))) || - ((retval == EXT2_ET_JOURNAL_UNSUPP_VERSION) && - (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_VERSION, &pctx)))) - retval = e2fsck_journal_fix_corrupt_super(ctx, journal, - &pctx); - e2fsck_journal_release(ctx, journal, 0, 1); - return retval; - } - - /* - * We want to make the flags consistent here. We will not leave with - * needs_recovery set but has_journal clear. We can't get in a loop - * with -y, -n, or -p, only if a user isn't making up their mind. - */ -no_has_journal: - if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { - recover = sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER; - pctx.str = "inode"; - if (fix_problem(ctx, PR_0_JOURNAL_HAS_JOURNAL, &pctx)) { - if (recover && - !fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, &pctx)) - goto no_has_journal; - /* - * Need a full fsck if we are releasing a - * journal stored on a reserved inode. - */ - force_fsck = recover || - (sb->s_journal_inum < EXT2_FIRST_INODE(sb)); - /* Clear all of the journal fields */ - sb->s_journal_inum = 0; - sb->s_journal_dev = 0; - memset(sb->s_journal_uuid, 0, - sizeof(sb->s_journal_uuid)); - e2fsck_clear_recover(ctx, force_fsck); - } else if (!(ctx->options & E2F_OPT_READONLY)) { - sb->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; - ext2fs_mark_super_dirty(ctx->fs); - } - } - - if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL && - !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) && - journal->j_superblock->s_start != 0) { - /* Print status information */ - fix_problem(ctx, PR_0_JOURNAL_RECOVERY_CLEAR, &pctx); - if (ctx->superblock) - problem = PR_0_JOURNAL_RUN_DEFAULT; - else - problem = PR_0_JOURNAL_RUN; - if (fix_problem(ctx, problem, &pctx)) { - ctx->options |= E2F_OPT_FORCE; - sb->s_feature_incompat |= - EXT3_FEATURE_INCOMPAT_RECOVER; - ext2fs_mark_super_dirty(ctx->fs); - } else if (fix_problem(ctx, - PR_0_JOURNAL_RESET_JOURNAL, &pctx)) { - reset = 1; - sb->s_state &= ~EXT2_VALID_FS; - ext2fs_mark_super_dirty(ctx->fs); - } - /* - * If the user answers no to the above question, we - * ignore the fact that journal apparently has data; - * accidentally replaying over valid data would be far - * worse than skipping a questionable recovery. - * - * XXX should we abort with a fatal error here? What - * will the ext3 kernel code do if a filesystem with - * !NEEDS_RECOVERY but with a non-zero - * journal->j_superblock->s_start is mounted? - */ - } - - e2fsck_journal_release(ctx, journal, reset, 0); - return retval; -} - -static errcode_t recover_ext3_journal(e2fsck_t ctx) -{ - journal_t *journal; - int retval; - - journal_init_revoke_caches(); - retval = e2fsck_get_journal(ctx, &journal); - if (retval) - return retval; - - retval = e2fsck_journal_load(journal); - if (retval) - goto errout; - - retval = journal_init_revoke(journal, 1024); - if (retval) - goto errout; - - retval = -journal_recover(journal); - if (retval) - goto errout; - - if (journal->j_superblock->s_errno) { - ctx->fs->super->s_state |= EXT2_ERROR_FS; - ext2fs_mark_super_dirty(ctx->fs); - journal->j_superblock->s_errno = 0; - mark_buffer_dirty(journal->j_sb_buffer); - } - -errout: - journal_destroy_revoke(journal); - journal_destroy_revoke_caches(); - e2fsck_journal_release(ctx, journal, 1, 0); - return retval; -} - -int e2fsck_run_ext3_journal(e2fsck_t ctx) -{ - io_manager io_ptr = ctx->fs->io->manager; - int blocksize = ctx->fs->blocksize; - errcode_t retval, recover_retval; - - printf(_("%s: recovering journal\n"), ctx->device_name); - if (ctx->options & E2F_OPT_READONLY) { - printf(_("%s: won't do journal recovery while read-only\n"), - ctx->device_name); - return EXT2_ET_FILE_RO; - } - - if (ctx->fs->flags & EXT2_FLAG_DIRTY) - ext2fs_flush(ctx->fs); /* Force out any modifications */ - - recover_retval = recover_ext3_journal(ctx); - - /* - * Reload the filesystem context to get up-to-date data from disk - * because journal recovery will change the filesystem under us. - */ - ext2fs_close(ctx->fs); - retval = ext2fs_open(ctx->filesystem_name, EXT2_FLAG_RW, - ctx->superblock, blocksize, io_ptr, - &ctx->fs); - - if (retval) { - com_err(ctx->program_name, retval, - _("while trying to re-open %s"), - ctx->device_name); - fatal_error(ctx, 0); - } - ctx->fs->priv_data = ctx; - - /* Set the superblock flags */ - e2fsck_clear_recover(ctx, recover_retval); - return recover_retval; -} - -/* - * This function will move the journal inode from a visible file in - * the filesystem directory hierarchy to the reserved inode if necessary. - */ -static const char * const journal_names[] = { - ".journal", "journal", ".journal.dat", "journal.dat", 0 }; - -void e2fsck_move_ext3_journal(e2fsck_t ctx) -{ - struct ext2_super_block *sb = ctx->fs->super; - struct problem_context pctx; - struct ext2_inode inode; - ext2_filsys fs = ctx->fs; - ext2_ino_t ino; - errcode_t retval; - const char * const * cpp; - int group, mount_flags; - - clear_problem_context(&pctx); - - /* - * If the filesystem is opened read-only, or there is no - * journal, then do nothing. - */ - if ((ctx->options & E2F_OPT_READONLY) || - (sb->s_journal_inum == 0) || - !(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) - return; - - /* - * Read in the journal inode - */ - if (ext2fs_read_inode(fs, sb->s_journal_inum, &inode) != 0) - return; - - /* - * If it's necessary to backup the journal inode, do so. - */ - if ((sb->s_jnl_backup_type == 0) || - ((sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS) && - memcmp(inode.i_block, sb->s_jnl_blocks, EXT2_N_BLOCKS*4))) { - if (fix_problem(ctx, PR_0_BACKUP_JNL, &pctx)) { - memcpy(sb->s_jnl_blocks, inode.i_block, - EXT2_N_BLOCKS*4); - sb->s_jnl_blocks[16] = inode.i_size; - sb->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; - ext2fs_mark_super_dirty(fs); - fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; - } - } - - /* - * If the journal is already the hidden inode, then do nothing - */ - if (sb->s_journal_inum == EXT2_JOURNAL_INO) - return; - - /* - * The journal inode had better have only one link and not be readable. - */ - if (inode.i_links_count != 1) - return; - - /* - * If the filesystem is mounted, or we can't tell whether - * or not it's mounted, do nothing. - */ - retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags); - if (retval || (mount_flags & EXT2_MF_MOUNTED)) - return; - - /* - * If we can't find the name of the journal inode, then do - * nothing. - */ - for (cpp = journal_names; *cpp; cpp++) { - retval = ext2fs_lookup(fs, EXT2_ROOT_INO, *cpp, - strlen(*cpp), 0, &ino); - if ((retval == 0) && (ino == sb->s_journal_inum)) - break; - } - if (*cpp == 0) - return; - - /* We need the inode bitmap to be loaded */ - retval = ext2fs_read_bitmaps(fs); - if (retval) - return; - - pctx.str = *cpp; - if (!fix_problem(ctx, PR_0_MOVE_JOURNAL, &pctx)) - return; - - /* - * OK, we've done all the checks, let's actually move the - * journal inode. Errors at this point mean we need to force - * an ext2 filesystem check. - */ - if ((retval = ext2fs_unlink(fs, EXT2_ROOT_INO, *cpp, ino, 0)) != 0) - goto err_out; - if ((retval = ext2fs_write_inode(fs, EXT2_JOURNAL_INO, &inode)) != 0) - goto err_out; - sb->s_journal_inum = EXT2_JOURNAL_INO; - ext2fs_mark_super_dirty(fs); - fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; - inode.i_links_count = 0; - inode.i_dtime = time(0); - if ((retval = ext2fs_write_inode(fs, ino, &inode)) != 0) - goto err_out; - - group = ext2fs_group_of_ino(fs, ino); - ext2fs_unmark_inode_bitmap(fs->inode_map, ino); - ext2fs_mark_ib_dirty(fs); - fs->group_desc[group].bg_free_inodes_count++; - fs->super->s_free_inodes_count++; - return; - -err_out: - pctx.errcode = retval; - fix_problem(ctx, PR_0_ERR_MOVE_JOURNAL, &pctx); - fs->super->s_state &= ~EXT2_VALID_FS; - ext2fs_mark_super_dirty(fs); - return; -} - |