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| author | Tao Ma <tao.ma@oracle.com> | 2007-12-18 10:47:03 +0300 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2008-01-26 01:53:35 +0300 |
| commit | d659072f736837e56b6433d58e5315ad1d4d5ccf (patch) | |
| tree | 56882b7b36c6b60a8208f6ed5bee9904adc7b649 /fs/ocfs2/suballoc.h | |
| parent | 7f68fc28219be3b44ef4132f95c6506ff3e806b5 (diff) | |
| download | linux-d659072f736837e56b6433d58e5315ad1d4d5ccf.tar.xz | |
[PATCH 1/2] ocfs2: Add group extend for online resize
This patch adds the ability for a userspace program to request an extend of
last cluster group on an Ocfs2 file system. The request is made via ioctl,
OCFS2_IOC_GROUP_EXTEND. This is derived from EXT3_IOC_GROUP_EXTEND, but is
obviously Ocfs2 specific.
tunefs.ocfs2 would call this for an online-resize operation if the last
cluster group isn't full.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/suballoc.h')
| -rw-r--r-- | fs/ocfs2/suballoc.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h index cafe93703095..8799033bb459 100644 --- a/fs/ocfs2/suballoc.h +++ b/fs/ocfs2/suballoc.h @@ -147,4 +147,12 @@ static inline int ocfs2_is_cluster_bitmap(struct inode *inode) int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, struct ocfs2_alloc_context *ac); +/* given a cluster offset, calculate which block group it belongs to + * and return that block offset. */ +u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster); + +/* somewhat more expensive than our other checks, so use sparingly. */ +int ocfs2_check_group_descriptor(struct super_block *sb, + struct ocfs2_dinode *di, + struct ocfs2_group_desc *gd); #endif /* _CHAINALLOC_H_ */ |