diff options
Diffstat (limited to 'fs/nilfs2/sufile.c')
| -rw-r--r-- | fs/nilfs2/sufile.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c index d560f882a868..3eed998df1c8 100644 --- a/fs/nilfs2/sufile.c +++ b/fs/nilfs2/sufile.c @@ -521,6 +521,43 @@ int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum) } /** + * nilfs_sufile_set_segment_usage - set usage of a segment + * @sufile: inode of segment usage file + * @segnum: segment number + * @nblocks: number of live blocks in the segment + * @modtime: modification time (option) + */ +int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum, + unsigned long nblocks, time_t modtime) +{ + struct buffer_head *bh; + struct nilfs_segment_usage *su; + void *kaddr; + int ret; + + down_write(&NILFS_MDT(sufile)->mi_sem); + ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 0, &bh); + if (ret < 0) + goto out_sem; + + kaddr = kmap_atomic(bh->b_page, KM_USER0); + su = nilfs_sufile_block_get_segment_usage(sufile, segnum, bh, kaddr); + WARN_ON(nilfs_segment_usage_error(su)); + if (modtime) + su->su_lastmod = cpu_to_le64(modtime); + su->su_nblocks = cpu_to_le32(nblocks); + kunmap_atomic(kaddr, KM_USER0); + + nilfs_mdt_mark_buffer_dirty(bh); + nilfs_mdt_mark_dirty(sufile); + brelse(bh); + + out_sem: + up_write(&NILFS_MDT(sufile)->mi_sem); + return ret; +} + +/** * nilfs_sufile_get_stat - get segment usage statistics * @sufile: inode of segment usage file * @stat: pointer to a structure of segment usage statistics |