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ocfs2: Add ocfs2_gd_is_discontig.

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Add ocfs2_gd_is_discontig so that we can test whether
a group descriptor is discontiguous or not.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
This commit is contained in:
Tao Ma 2010-05-17 15:14:17 +08:00
parent 8571882c21
commit af2bf0d860
1 changed files with 14 additions and 0 deletions
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14
fs/ocfs2/ocfs2_fs.h
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@ -1574,5 +1574,19 @@ static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de,
de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
}
static inline int ocfs2_gd_is_discontig(struct ocfs2_group_desc *gd)
{
if ((offsetof(struct ocfs2_group_desc, bg_bitmap) +
le16_to_cpu(gd->bg_size)) !=
offsetof(struct ocfs2_group_desc, bg_list))
return 0;
/*
* Only valid to check l_next_free_rec if
* bg_bitmap + bg_size == bg_list.
*/
if (!gd->bg_list.l_next_free_rec)
return 0;
return 1;
}
#endif /* _OCFS2_FS_H */