diff options
| -rw-r--r-- | fs/nilfs2/dat.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c index 1e7f653c1df7..9cf6ba58f585 100644 --- a/fs/nilfs2/dat.c +++ b/fs/nilfs2/dat.c @@ -158,6 +158,7 @@ void nilfs_dat_commit_start(struct inode *dat, struct nilfs_palloc_req *req, int nilfs_dat_prepare_end(struct inode *dat, struct nilfs_palloc_req *req) { struct nilfs_dat_entry *entry; + __u64 start; sector_t blocknr; void *kaddr; int ret; @@ -169,6 +170,7 @@ int nilfs_dat_prepare_end(struct inode *dat, struct nilfs_palloc_req *req) kaddr = kmap_atomic(req->pr_entry_bh->b_page); entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr, req->pr_entry_bh, kaddr); + start = le64_to_cpu(entry->de_start); blocknr = le64_to_cpu(entry->de_blocknr); kunmap_atomic(kaddr); @@ -179,6 +181,15 @@ int nilfs_dat_prepare_end(struct inode *dat, struct nilfs_palloc_req *req) return ret; } } + if (unlikely(start > nilfs_mdt_cno(dat))) { + nilfs_err(dat->i_sb, + "vblocknr = %llu has abnormal lifetime: start cno (= %llu) > current cno (= %llu)", + (unsigned long long)req->pr_entry_nr, + (unsigned long long)start, + (unsigned long long)nilfs_mdt_cno(dat)); + nilfs_dat_abort_entry(dat, req); + return -EINVAL; + } return 0; } |