diff options
Diffstat (limited to 'fs/nilfs2/ifile.c')
| -rw-r--r-- | fs/nilfs2/ifile.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/fs/nilfs2/ifile.c b/fs/nilfs2/ifile.c index 684d76300a8..6548c7851b4 100644 --- a/fs/nilfs2/ifile.c +++ b/fs/nilfs2/ifile.c @@ -29,7 +29,11 @@ #include "alloc.h" #include "ifile.h" - +/** + * struct nilfs_ifile_info - on-memory private data of ifile + * @mi: on-memory private data of metadata file + * @palloc_cache: persistent object allocator cache of ifile + */ struct nilfs_ifile_info { struct nilfs_mdt_info mi; struct nilfs_palloc_cache palloc_cache; @@ -122,11 +126,11 @@ int nilfs_ifile_delete_inode(struct inode *ifile, ino_t ino) return ret; } - kaddr = kmap_atomic(req.pr_entry_bh->b_page, KM_USER0); + kaddr = kmap_atomic(req.pr_entry_bh->b_page); raw_inode = nilfs_palloc_block_get_entry(ifile, req.pr_entry_nr, req.pr_entry_bh, kaddr); raw_inode->i_flags = 0; - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); mark_buffer_dirty(req.pr_entry_bh); brelse(req.pr_entry_bh); @@ -156,6 +160,28 @@ int nilfs_ifile_get_inode_block(struct inode *ifile, ino_t ino, } /** + * nilfs_ifile_count_free_inodes - calculate free inodes count + * @ifile: ifile inode + * @nmaxinodes: current maximum of available inodes count [out] + * @nfreeinodes: free inodes count [out] + */ +int nilfs_ifile_count_free_inodes(struct inode *ifile, + u64 *nmaxinodes, u64 *nfreeinodes) +{ + u64 nused; + int err; + + *nmaxinodes = 0; + *nfreeinodes = 0; + + nused = atomic64_read(&NILFS_I(ifile)->i_root->inodes_count); + err = nilfs_palloc_count_max_entries(ifile, nused, nmaxinodes); + if (likely(!err)) + *nfreeinodes = *nmaxinodes - nused; + return err; +} + +/** * nilfs_ifile_read - read or get ifile inode * @sb: super block instance * @root: root object |