[XFS] embededd struct xfs_imap into xfs_inode

Most uses of struct xfs_imap are to map and inode to a buffer.  To avoid
copying around the inode location information we should just embedd a
strcut xfs_imap into the xfs_inode.  To make sure it doesn't bloat an
inode the im_len is changed to a ushort, which is fine as that's what
the users exepect anyway.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
This commit is contained in:
Christoph Hellwig
2008-11-28 14:23:41 +11:00
committed by Niv Sardi
parent 94e1b69d1a
commit 92bfc6e7c4
7 changed files with 33 additions and 71 deletions

View File

@ -82,6 +82,16 @@ typedef struct xfs_ifork {
} if_u2;
} xfs_ifork_t;
/*
* Inode location information. Stored in the inode and passed to
* xfs_imap_to_bp() to get a buffer and dinode for a given inode.
*/
struct xfs_imap {
xfs_daddr_t im_blkno; /* starting BB of inode chunk */
ushort im_len; /* length in BBs of inode chunk */
ushort im_boffset; /* inode offset in block in bytes */
};
/*
* This is the xfs in-core inode structure.
* Most of the on-disk inode is embedded in the i_d field.
@ -238,9 +248,7 @@ typedef struct xfs_inode {
/* Inode location stuff */
xfs_ino_t i_ino; /* inode number (agno/agino)*/
xfs_daddr_t i_blkno; /* blkno of inode buffer */
ushort i_len; /* len of inode buffer */
ushort i_boffset; /* off of inode in buffer */
struct xfs_imap i_imap; /* location for xfs_imap() */
/* Extent information. */
xfs_ifork_t *i_afp; /* attribute fork pointer */