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-rw-r--r--e2fsprogs/e2fsck/journal.c960
1 files changed, 960 insertions, 0 deletions
diff --git a/e2fsprogs/e2fsck/journal.c b/e2fsprogs/e2fsck/journal.c
new file mode 100644
index 0000000..14e774d
--- /dev/null
+++ b/e2fsprogs/e2fsck/journal.c
@@ -0,0 +1,960 @@
+/*
+ * 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;
+}
+