/**
* journal_t * journal_init_inode () - creates a journal which maps to a inode.
* @inode: An inode to create the journal in
*
* journal_init_inode creates a journal which maps an on-disk inode as
* the journal. The inode must exist already, must support bmap() and
* must have all data blocks preallocated.
*/
journal_t * journal_init_inode (struct inode *inode)
{
struct buffer_head *bh;
journal_t *journal = journal_init_common();
int err;
int n;
unsigned long blocknr;
if (!journal)
return NULL;
journal->j_dev = journal->j_fs_dev = inode->i_sb->s_bdev;
journal->j_inode = inode;
jbd_debug(1,
"journal %p: inode %s/%ld, size %Ld, bits %d, blksize %ld\n",
journal, inode->i_sb->s_id, inode->i_ino,
(s64) inode->i_size,
inode->i_sb->s_blocksize_bits, inode->i_sb->s_blocksize);
journal->j_maxlen = (unsigned int)(inode->i_size >> inode->i_sb->s_blocksize_bits);
journal->j_blocksize = inode->i_sb->s_blocksize;
/* journal descriptor can store up to n blocks -bzzz */
n = journal->j_blocksize / sizeof(journal_block_tag_t);
journal->j_wbufsize = n;
journal->j_wbuf = kmalloc(n * sizeof(struct buffer_head*), GFP_KERNEL);
if (!journal->j_wbuf) {
printk(KERN_ERR "%s: Cant allocate bhs for commit thread\n",
__FUNCTION__);
J_ASSERT(journal->j_revoke != NULL);
if (journal->j_revoke)
journal_destroy_revoke(journal);
kfree(journal);
return NULL;
}
err = journal_bmap(journal, 0, &blocknr);
/* If that failed, give up */
if (err) {
printk(KERN_ERR "%s: Cannnot locate journal superblock\n",
__FUNCTION__);
J_ASSERT(journal->j_revoke != NULL);
if (journal->j_revoke)
journal_destroy_revoke(journal);
J_ASSERT(journal->j_wbuf != NULL);
kfree(journal->j_wbuf);
kfree(journal);
return NULL;
}
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
J_ASSERT(bh != NULL);
journal->j_sb_buffer = bh;
journal->j_superblock = (journal_superblock_t *)bh->b_data;
return journal;
}
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;
}
errcode_t ext2fs_open_journal(ext2_filsys fs, journal_t **j)
{
journal_t *journal;
errcode_t retval;
journal_init_revoke_caches();
retval = ext2fs_get_journal(fs, &journal);
if (retval)
return retval;
retval = ext2fs_journal_load(journal);
if (retval)
goto errout;
retval = journal_init_revoke(journal, 1024);
if (retval)
goto errout;
if (journal->j_failed_commit) {
journal->j_superblock->s_errno = -EINVAL;
mark_buffer_dirty(journal->j_sb_buffer);
}
*j = journal;
return 0;
errout:
journal_destroy_revoke(journal);
journal_destroy_revoke_caches();
ext2fs_journal_release(fs, journal, 1, 0);
return retval;
}
errcode_t ext2fs_close_journal(ext2_filsys fs, journal_t **j)
{
journal_t *journal = *j;
journal_destroy_revoke(journal);
journal_destroy_revoke_caches();
ext2fs_journal_release(fs, journal, 0, 0);
*j = NULL;
return 0;
}
/**
* void journal_destroy() - Release a journal_t structure.
* @journal: Journal to act on.
*
* Release a journal_t structure once it is no longer in use by the
* journaled object.
*/
void journal_destroy(journal_t *journal)
{
#if 0
/* Wait for the commit thread to wake up and die. */
journal_kill_thread(journal);
/* Force a final log commit */
if (journal->j_running_transaction)
journal_commit_transaction(journal);
/* Force any old transactions to disk */
/* Totally anal locking here... */
jbd_lock(&journal->j_list_lock);
while (journal->j_checkpoint_transactions != NULL) {
jbd_unlock(&journal->j_list_lock);
log_do_checkpoint(journal);
jbd_lock(&journal->j_list_lock);
}
J_ASSERT(journal->j_running_transaction == NULL);
J_ASSERT(journal->j_committing_transaction == NULL);
J_ASSERT(journal->j_checkpoint_transactions == NULL);
jbd_unlock(&journal->j_list_lock);
/* We can now mark the journal as empty. */
journal->j_tail = 0;
journal->j_tail_sequence = ++journal->j_transaction_sequence;
if (journal->j_sb_buffer) {
journal_update_superblock(journal, 1);
brelse(journal->j_sb_buffer);
}
#endif
if (journal->j_sb_buffer) {
brelse(journal->j_sb_buffer);
}
if (journal->j_inode)
iput(journal->j_inode);
if (journal->j_revoke)
journal_destroy_revoke(journal);
kfree(journal->j_wbuf);
kfree(journal);
}
static errcode_t recover_ext3_journal(e2fsck_t ctx)
{
struct problem_context pctx;
journal_t *journal;
int retval;
clear_problem_context(&pctx);
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_failed_commit) {
pctx.ino = journal->j_failed_commit;
fix_problem(ctx, PR_0_JNL_TXN_CORRUPT, &pctx);
journal->j_superblock->s_errno = -EINVAL;
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;
}
