diff options
| -rw-r--r-- | fs/nilfs2/the_nilfs.c | 45 |
1 files changed, 32 insertions, 13 deletions
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c index 530d2777b4c7..0d2a46cb75f8 100644 --- a/fs/nilfs2/the_nilfs.c +++ b/fs/nilfs2/the_nilfs.c @@ -247,6 +247,36 @@ static void nilfs_clear_recovery_info(struct nilfs_recovery_info *ri) } /** + * nilfs_store_log_cursor - load log cursor from a super block + * @nilfs: nilfs object + * @sbp: buffer storing super block to be read + * + * nilfs_store_log_cursor() reads the last position of the log + * containing a super root from a given super block, and initializes + * relevant information on the nilfs object preparatory for log + * scanning and recovery. + */ +static int nilfs_store_log_cursor(struct the_nilfs *nilfs, + struct nilfs_super_block *sbp) +{ + int ret = 0; + + nilfs->ns_last_pseg = le64_to_cpu(sbp->s_last_pseg); + nilfs->ns_last_cno = le64_to_cpu(sbp->s_last_cno); + nilfs->ns_last_seq = le64_to_cpu(sbp->s_last_seq); + + nilfs->ns_seg_seq = nilfs->ns_last_seq; + nilfs->ns_segnum = + nilfs_get_segnum_of_block(nilfs, nilfs->ns_last_pseg); + nilfs->ns_cno = nilfs->ns_last_cno + 1; + if (nilfs->ns_segnum >= nilfs->ns_nsegments) { + printk(KERN_ERR "NILFS invalid last segment number.\n"); + ret = -EINVAL; + } + return ret; +} + +/** * load_nilfs - load and recover the nilfs * @nilfs: the_nilfs structure to be released * @sbi: nilfs_sb_info used to recover past segment @@ -615,20 +645,9 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data) bdi = nilfs->ns_bdev->bd_inode->i_mapping->backing_dev_info; nilfs->ns_bdi = bdi ? : &default_backing_dev_info; - /* Finding last segment */ - nilfs->ns_last_pseg = le64_to_cpu(sbp->s_last_pseg); - nilfs->ns_last_cno = le64_to_cpu(sbp->s_last_cno); - nilfs->ns_last_seq = le64_to_cpu(sbp->s_last_seq); - - nilfs->ns_seg_seq = nilfs->ns_last_seq; - nilfs->ns_segnum = - nilfs_get_segnum_of_block(nilfs, nilfs->ns_last_pseg); - nilfs->ns_cno = nilfs->ns_last_cno + 1; - if (nilfs->ns_segnum >= nilfs->ns_nsegments) { - printk(KERN_ERR "NILFS invalid last segment number.\n"); - err = -EINVAL; + err = nilfs_store_log_cursor(nilfs, sbp); + if (err) goto failed_sbh; - } /* Initialize gcinode cache */ err = nilfs_init_gccache(nilfs); |