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Diffstat (limited to 'fs/nilfs2/dat.c')
-rw-r--r--fs/nilfs2/dat.c11
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;
}