Commit 9a2cc41c authored by Dave Chinner's avatar Dave Chinner Committed by Dave Chinner
Browse files

xfs: move type conversion functions to xfs_dir.h 



These are currently considered private to libxfs, but they are
widely used by the userspace code to decode, walk and check
directory structures. Hence they really form part of the external
API and as such need to bemoved to xfs_dir2.h.

Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent 1b767ee3

fs/xfs/libxfs/xfs_dir2.h

+134 −0
Original line number Diff line number Diff line
@@ -183,4 +183,138 @@ extern const struct xfs_buf_ops xfs_dir3_leaf1_buf_ops; 
extern const struct xfs_buf_ops xfs_dir3_free_buf_ops;

extern const struct xfs_buf_ops xfs_dir3_data_buf_ops;



/*

 * Directory offset/block conversion functions.

 *

 * DB blocks here are logical directory block numbers, not filesystem blocks.

 */



/*

 * Convert dataptr to byte in file space

 */

static inline xfs_dir2_off_t

xfs_dir2_dataptr_to_byte(xfs_dir2_dataptr_t dp)

{

	return (xfs_dir2_off_t)dp << XFS_DIR2_DATA_ALIGN_LOG;

}



/*

 * Convert byte in file space to dataptr.  It had better be aligned.

 */

static inline xfs_dir2_dataptr_t

xfs_dir2_byte_to_dataptr(xfs_dir2_off_t by)

{

	return (xfs_dir2_dataptr_t)(by >> XFS_DIR2_DATA_ALIGN_LOG);

}



/*

 * Convert byte in space to (DB) block

 */

static inline xfs_dir2_db_t

xfs_dir2_byte_to_db(struct xfs_da_geometry *geo, xfs_dir2_off_t by)

{

	return (xfs_dir2_db_t)(by >> geo->blklog);

}



/*

 * Convert dataptr to a block number

 */

static inline xfs_dir2_db_t

xfs_dir2_dataptr_to_db(struct xfs_da_geometry *geo, xfs_dir2_dataptr_t dp)

{

	return xfs_dir2_byte_to_db(geo, xfs_dir2_dataptr_to_byte(dp));

}



/*

 * Convert byte in space to offset in a block

 */

static inline xfs_dir2_data_aoff_t

xfs_dir2_byte_to_off(struct xfs_da_geometry *geo, xfs_dir2_off_t by)

{

	return (xfs_dir2_data_aoff_t)(by & (geo->blksize - 1));

}



/*

 * Convert dataptr to a byte offset in a block

 */

static inline xfs_dir2_data_aoff_t

xfs_dir2_dataptr_to_off(struct xfs_da_geometry *geo, xfs_dir2_dataptr_t dp)

{

	return xfs_dir2_byte_to_off(geo, xfs_dir2_dataptr_to_byte(dp));

}



/*

 * Convert block and offset to byte in space

 */

static inline xfs_dir2_off_t

xfs_dir2_db_off_to_byte(struct xfs_da_geometry *geo, xfs_dir2_db_t db,

			xfs_dir2_data_aoff_t o)

{

	return ((xfs_dir2_off_t)db << geo->blklog) + o;

}



/*

 * Convert block (DB) to block (dablk)

 */

static inline xfs_dablk_t

xfs_dir2_db_to_da(struct xfs_da_geometry *geo, xfs_dir2_db_t db)

{

	return (xfs_dablk_t)(db << (geo->blklog - geo->fsblog));

}



/*

 * Convert byte in space to (DA) block

 */

static inline xfs_dablk_t

xfs_dir2_byte_to_da(struct xfs_da_geometry *geo, xfs_dir2_off_t by)

{

	return xfs_dir2_db_to_da(geo, xfs_dir2_byte_to_db(geo, by));

}



/*

 * Convert block and offset to dataptr

 */

static inline xfs_dir2_dataptr_t

xfs_dir2_db_off_to_dataptr(struct xfs_da_geometry *geo, xfs_dir2_db_t db,

			   xfs_dir2_data_aoff_t o)

{

	return xfs_dir2_byte_to_dataptr(xfs_dir2_db_off_to_byte(geo, db, o));

}



/*

 * Convert block (dablk) to block (DB)

 */

static inline xfs_dir2_db_t

xfs_dir2_da_to_db(struct xfs_da_geometry *geo, xfs_dablk_t da)

{

	return (xfs_dir2_db_t)(da >> (geo->blklog - geo->fsblog));

}



/*

 * Convert block (dablk) to byte offset in space

 */

static inline xfs_dir2_off_t

xfs_dir2_da_to_byte(struct xfs_da_geometry *geo, xfs_dablk_t da)

{

	return xfs_dir2_db_off_to_byte(geo, xfs_dir2_da_to_db(geo, da), 0);

}



/*

 * Directory tail pointer accessor functions. Based on block geometry.

 */

static inline struct xfs_dir2_block_tail *

xfs_dir2_block_tail_p(struct xfs_da_geometry *geo, struct xfs_dir2_data_hdr *hdr)

{

	return ((struct xfs_dir2_block_tail *)

		((char *)hdr + geo->blksize)) - 1;

}



static inline struct xfs_dir2_leaf_tail *

xfs_dir2_leaf_tail_p(struct xfs_da_geometry *geo, struct xfs_dir2_leaf *lp)

{

	return (struct xfs_dir2_leaf_tail *)

		((char *)lp + geo->blksize -

		  sizeof(struct xfs_dir2_leaf_tail));

}



#endif	/* __XFS_DIR2_H__ */

fs/xfs/libxfs/xfs_dir2_priv.h

+0 −134
Original line number Diff line number Diff line
@@ -20,140 +20,6 @@ 


struct dir_context;



/*

 * Directory offset/block conversion functions.

 *

 * DB blocks here are logical directory block numbers, not filesystem blocks.

 */



/*

 * Convert dataptr to byte in file space

 */

static inline xfs_dir2_off_t

xfs_dir2_dataptr_to_byte(xfs_dir2_dataptr_t dp)

{

	return (xfs_dir2_off_t)dp << XFS_DIR2_DATA_ALIGN_LOG;

}



/*

 * Convert byte in file space to dataptr.  It had better be aligned.

 */

static inline xfs_dir2_dataptr_t

xfs_dir2_byte_to_dataptr(xfs_dir2_off_t by)

{

	return (xfs_dir2_dataptr_t)(by >> XFS_DIR2_DATA_ALIGN_LOG);

}



/*

 * Convert byte in space to (DB) block

 */

static inline xfs_dir2_db_t

xfs_dir2_byte_to_db(struct xfs_da_geometry *geo, xfs_dir2_off_t by)

{

	return (xfs_dir2_db_t)(by >> geo->blklog);

}



/*

 * Convert dataptr to a block number

 */

static inline xfs_dir2_db_t

xfs_dir2_dataptr_to_db(struct xfs_da_geometry *geo, xfs_dir2_dataptr_t dp)

{

	return xfs_dir2_byte_to_db(geo, xfs_dir2_dataptr_to_byte(dp));

}



/*

 * Convert byte in space to offset in a block

 */

static inline xfs_dir2_data_aoff_t

xfs_dir2_byte_to_off(struct xfs_da_geometry *geo, xfs_dir2_off_t by)

{

	return (xfs_dir2_data_aoff_t)(by & (geo->blksize - 1));

}



/*

 * Convert dataptr to a byte offset in a block

 */

static inline xfs_dir2_data_aoff_t

xfs_dir2_dataptr_to_off(struct xfs_da_geometry *geo, xfs_dir2_dataptr_t dp)

{

	return xfs_dir2_byte_to_off(geo, xfs_dir2_dataptr_to_byte(dp));

}



/*

 * Convert block and offset to byte in space

 */

static inline xfs_dir2_off_t

xfs_dir2_db_off_to_byte(struct xfs_da_geometry *geo, xfs_dir2_db_t db,

			xfs_dir2_data_aoff_t o)

{

	return ((xfs_dir2_off_t)db << geo->blklog) + o;

}



/*

 * Convert block (DB) to block (dablk)

 */

static inline xfs_dablk_t

xfs_dir2_db_to_da(struct xfs_da_geometry *geo, xfs_dir2_db_t db)

{

	return (xfs_dablk_t)(db << (geo->blklog - geo->fsblog));

}



/*

 * Convert byte in space to (DA) block

 */

static inline xfs_dablk_t

xfs_dir2_byte_to_da(struct xfs_da_geometry *geo, xfs_dir2_off_t by)

{

	return xfs_dir2_db_to_da(geo, xfs_dir2_byte_to_db(geo, by));

}



/*

 * Convert block and offset to dataptr

 */

static inline xfs_dir2_dataptr_t

xfs_dir2_db_off_to_dataptr(struct xfs_da_geometry *geo, xfs_dir2_db_t db,

			   xfs_dir2_data_aoff_t o)

{

	return xfs_dir2_byte_to_dataptr(xfs_dir2_db_off_to_byte(geo, db, o));

}



/*

 * Convert block (dablk) to block (DB)

 */

static inline xfs_dir2_db_t

xfs_dir2_da_to_db(struct xfs_da_geometry *geo, xfs_dablk_t da)

{

	return (xfs_dir2_db_t)(da >> (geo->blklog - geo->fsblog));

}



/*

 * Convert block (dablk) to byte offset in space

 */

static inline xfs_dir2_off_t

xfs_dir2_da_to_byte(struct xfs_da_geometry *geo, xfs_dablk_t da)

{

	return xfs_dir2_db_off_to_byte(geo, xfs_dir2_da_to_db(geo, da), 0);

}



/*

 * Directory tail pointer accessor functions. Based on block geometry.

 */

static inline struct xfs_dir2_block_tail *

xfs_dir2_block_tail_p(struct xfs_da_geometry *geo, struct xfs_dir2_data_hdr *hdr)

{

	return ((struct xfs_dir2_block_tail *)

		((char *)hdr + geo->blksize)) - 1;

}



static inline struct xfs_dir2_leaf_tail *

xfs_dir2_leaf_tail_p(struct xfs_da_geometry *geo, struct xfs_dir2_leaf *lp)

{

	return (struct xfs_dir2_leaf_tail *)

		((char *)lp + geo->blksize -

		  sizeof(struct xfs_dir2_leaf_tail));

}



/* xfs_dir2.c */

extern int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino);

extern int xfs_dir2_grow_inode(struct xfs_da_args *args, int space,

fs/xfs/xfs_export.c

+1 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include "xfs_ag.h"

#include "xfs_mount.h"

#include "xfs_da_format.h"

#include "xfs_da_btree.h"

#include "xfs_dir2.h"

#include "xfs_export.h"

#include "xfs_inode.h"

fs/xfs/xfs_log_recover.c

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include "xfs_ag.h"

#include "xfs_mount.h"

#include "xfs_da_format.h"

#include "xfs_da_btree.h"

#include "xfs_inode.h"

#include "xfs_trans.h"

#include "xfs_log.h"

fs/xfs/xfs_mount.c

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include "xfs_ag.h"

#include "xfs_mount.h"

#include "xfs_da_format.h"

#include "xfs_da_btree.h"

#include "xfs_inode.h"

#include "xfs_dir2.h"

#include "xfs_ialloc.h"

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