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ocfs2: Support xfs style space reservation ioctls

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We re-use the RESVSP/UNRESVSP ioctls from xfs which allow the user to
allocate and deallocate regions to a file without zeroing data or changing
i_size.

Though renamed, the structure passed in from user is identical to struct
xfs_flock64. The three fields that are actually used right now are l_whence,
l_start and l_len.

This should get ocfs2 immediate compatibility with userspace software using
the pre-existing xfs ioctls.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh
2007-03-09 16:53:21 -08:00
parent 063c4561f5
commit b25801038d
6 changed files with 216 additions and 16 deletions
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fs/ocfs2/file.h
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@@ -62,4 +62,7 @@ int ocfs2_should_update_atime(struct inode *inode,
int ocfs2_update_inode_atime(struct inode *inode,
struct buffer_head *bh);
int ocfs2_change_file_space(struct file *file, unsigned int cmd,
struct ocfs2_space_resv *sr);
#endif /* OCFS2_FILE_H */