mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-30 15:44:13 +08:00
a5c46e5e89
Scrub the hash tree and all the entries in a directory. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
345 lines
11 KiB
C
345 lines
11 KiB
C
/*
|
|
* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __XFS_DIR2_H__
|
|
#define __XFS_DIR2_H__
|
|
|
|
#include "xfs_da_format.h"
|
|
#include "xfs_da_btree.h"
|
|
|
|
struct xfs_defer_ops;
|
|
struct xfs_da_args;
|
|
struct xfs_inode;
|
|
struct xfs_mount;
|
|
struct xfs_trans;
|
|
struct xfs_dir2_sf_hdr;
|
|
struct xfs_dir2_sf_entry;
|
|
struct xfs_dir2_data_hdr;
|
|
struct xfs_dir2_data_entry;
|
|
struct xfs_dir2_data_unused;
|
|
|
|
extern struct xfs_name xfs_name_dotdot;
|
|
|
|
/*
|
|
* Convert inode mode to directory entry filetype
|
|
*/
|
|
extern unsigned char xfs_mode_to_ftype(int mode);
|
|
|
|
/*
|
|
* directory operations vector for encode/decode routines
|
|
*/
|
|
struct xfs_dir_ops {
|
|
int (*sf_entsize)(struct xfs_dir2_sf_hdr *hdr, int len);
|
|
struct xfs_dir2_sf_entry *
|
|
(*sf_nextentry)(struct xfs_dir2_sf_hdr *hdr,
|
|
struct xfs_dir2_sf_entry *sfep);
|
|
uint8_t (*sf_get_ftype)(struct xfs_dir2_sf_entry *sfep);
|
|
void (*sf_put_ftype)(struct xfs_dir2_sf_entry *sfep,
|
|
uint8_t ftype);
|
|
xfs_ino_t (*sf_get_ino)(struct xfs_dir2_sf_hdr *hdr,
|
|
struct xfs_dir2_sf_entry *sfep);
|
|
void (*sf_put_ino)(struct xfs_dir2_sf_hdr *hdr,
|
|
struct xfs_dir2_sf_entry *sfep,
|
|
xfs_ino_t ino);
|
|
xfs_ino_t (*sf_get_parent_ino)(struct xfs_dir2_sf_hdr *hdr);
|
|
void (*sf_put_parent_ino)(struct xfs_dir2_sf_hdr *hdr,
|
|
xfs_ino_t ino);
|
|
|
|
int (*data_entsize)(int len);
|
|
uint8_t (*data_get_ftype)(struct xfs_dir2_data_entry *dep);
|
|
void (*data_put_ftype)(struct xfs_dir2_data_entry *dep,
|
|
uint8_t ftype);
|
|
__be16 * (*data_entry_tag_p)(struct xfs_dir2_data_entry *dep);
|
|
struct xfs_dir2_data_free *
|
|
(*data_bestfree_p)(struct xfs_dir2_data_hdr *hdr);
|
|
|
|
xfs_dir2_data_aoff_t data_dot_offset;
|
|
xfs_dir2_data_aoff_t data_dotdot_offset;
|
|
xfs_dir2_data_aoff_t data_first_offset;
|
|
size_t data_entry_offset;
|
|
|
|
struct xfs_dir2_data_entry *
|
|
(*data_dot_entry_p)(struct xfs_dir2_data_hdr *hdr);
|
|
struct xfs_dir2_data_entry *
|
|
(*data_dotdot_entry_p)(struct xfs_dir2_data_hdr *hdr);
|
|
struct xfs_dir2_data_entry *
|
|
(*data_first_entry_p)(struct xfs_dir2_data_hdr *hdr);
|
|
struct xfs_dir2_data_entry *
|
|
(*data_entry_p)(struct xfs_dir2_data_hdr *hdr);
|
|
struct xfs_dir2_data_unused *
|
|
(*data_unused_p)(struct xfs_dir2_data_hdr *hdr);
|
|
|
|
int leaf_hdr_size;
|
|
void (*leaf_hdr_to_disk)(struct xfs_dir2_leaf *to,
|
|
struct xfs_dir3_icleaf_hdr *from);
|
|
void (*leaf_hdr_from_disk)(struct xfs_dir3_icleaf_hdr *to,
|
|
struct xfs_dir2_leaf *from);
|
|
int (*leaf_max_ents)(struct xfs_da_geometry *geo);
|
|
struct xfs_dir2_leaf_entry *
|
|
(*leaf_ents_p)(struct xfs_dir2_leaf *lp);
|
|
|
|
int node_hdr_size;
|
|
void (*node_hdr_to_disk)(struct xfs_da_intnode *to,
|
|
struct xfs_da3_icnode_hdr *from);
|
|
void (*node_hdr_from_disk)(struct xfs_da3_icnode_hdr *to,
|
|
struct xfs_da_intnode *from);
|
|
struct xfs_da_node_entry *
|
|
(*node_tree_p)(struct xfs_da_intnode *dap);
|
|
|
|
int free_hdr_size;
|
|
void (*free_hdr_to_disk)(struct xfs_dir2_free *to,
|
|
struct xfs_dir3_icfree_hdr *from);
|
|
void (*free_hdr_from_disk)(struct xfs_dir3_icfree_hdr *to,
|
|
struct xfs_dir2_free *from);
|
|
int (*free_max_bests)(struct xfs_da_geometry *geo);
|
|
__be16 * (*free_bests_p)(struct xfs_dir2_free *free);
|
|
xfs_dir2_db_t (*db_to_fdb)(struct xfs_da_geometry *geo,
|
|
xfs_dir2_db_t db);
|
|
int (*db_to_fdindex)(struct xfs_da_geometry *geo,
|
|
xfs_dir2_db_t db);
|
|
};
|
|
|
|
extern const struct xfs_dir_ops *
|
|
xfs_dir_get_ops(struct xfs_mount *mp, struct xfs_inode *dp);
|
|
extern const struct xfs_dir_ops *
|
|
xfs_nondir_get_ops(struct xfs_mount *mp, struct xfs_inode *dp);
|
|
|
|
/*
|
|
* Generic directory interface routines
|
|
*/
|
|
extern void xfs_dir_startup(void);
|
|
extern int xfs_da_mount(struct xfs_mount *mp);
|
|
extern void xfs_da_unmount(struct xfs_mount *mp);
|
|
|
|
extern int xfs_dir_isempty(struct xfs_inode *dp);
|
|
extern int xfs_dir_init(struct xfs_trans *tp, struct xfs_inode *dp,
|
|
struct xfs_inode *pdp);
|
|
extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp,
|
|
struct xfs_name *name, xfs_ino_t inum,
|
|
xfs_fsblock_t *first,
|
|
struct xfs_defer_ops *dfops, xfs_extlen_t tot);
|
|
extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp,
|
|
struct xfs_name *name, xfs_ino_t *inum,
|
|
struct xfs_name *ci_name);
|
|
extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp,
|
|
struct xfs_name *name, xfs_ino_t ino,
|
|
xfs_fsblock_t *first,
|
|
struct xfs_defer_ops *dfops, xfs_extlen_t tot);
|
|
extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp,
|
|
struct xfs_name *name, xfs_ino_t inum,
|
|
xfs_fsblock_t *first,
|
|
struct xfs_defer_ops *dfops, xfs_extlen_t tot);
|
|
extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp,
|
|
struct xfs_name *name);
|
|
|
|
/*
|
|
* Direct call from the bmap code, bypassing the generic directory layer.
|
|
*/
|
|
extern int xfs_dir2_sf_to_block(struct xfs_da_args *args);
|
|
|
|
/*
|
|
* Interface routines used by userspace utilities
|
|
*/
|
|
extern int xfs_dir2_isblock(struct xfs_da_args *args, int *r);
|
|
extern int xfs_dir2_isleaf(struct xfs_da_args *args, int *r);
|
|
extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db,
|
|
struct xfs_buf *bp);
|
|
|
|
extern void xfs_dir2_data_freescan_int(struct xfs_da_geometry *geo,
|
|
const struct xfs_dir_ops *ops,
|
|
struct xfs_dir2_data_hdr *hdr, int *loghead);
|
|
extern void xfs_dir2_data_freescan(struct xfs_inode *dp,
|
|
struct xfs_dir2_data_hdr *hdr, int *loghead);
|
|
extern void xfs_dir2_data_log_entry(struct xfs_da_args *args,
|
|
struct xfs_buf *bp, struct xfs_dir2_data_entry *dep);
|
|
extern void xfs_dir2_data_log_header(struct xfs_da_args *args,
|
|
struct xfs_buf *bp);
|
|
extern void xfs_dir2_data_log_unused(struct xfs_da_args *args,
|
|
struct xfs_buf *bp, struct xfs_dir2_data_unused *dup);
|
|
extern void xfs_dir2_data_make_free(struct xfs_da_args *args,
|
|
struct xfs_buf *bp, xfs_dir2_data_aoff_t offset,
|
|
xfs_dir2_data_aoff_t len, int *needlogp, int *needscanp);
|
|
extern void xfs_dir2_data_use_free(struct xfs_da_args *args,
|
|
struct xfs_buf *bp, struct xfs_dir2_data_unused *dup,
|
|
xfs_dir2_data_aoff_t offset, xfs_dir2_data_aoff_t len,
|
|
int *needlogp, int *needscanp);
|
|
|
|
extern struct xfs_dir2_data_free *xfs_dir2_data_freefind(
|
|
struct xfs_dir2_data_hdr *hdr, struct xfs_dir2_data_free *bf,
|
|
struct xfs_dir2_data_unused *dup);
|
|
|
|
extern int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino);
|
|
|
|
extern const struct xfs_buf_ops xfs_dir3_block_buf_ops;
|
|
extern const struct xfs_buf_ops xfs_dir3_leafn_buf_ops;
|
|
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));
|
|
}
|
|
|
|
/*
|
|
* The Linux API doesn't pass down the total size of the buffer
|
|
* we read into down to the filesystem. With the filldir concept
|
|
* it's not needed for correct information, but the XFS dir2 leaf
|
|
* code wants an estimate of the buffer size to calculate it's
|
|
* readahead window and size the buffers used for mapping to
|
|
* physical blocks.
|
|
*
|
|
* Try to give it an estimate that's good enough, maybe at some
|
|
* point we can change the ->readdir prototype to include the
|
|
* buffer size. For now we use the current glibc buffer size.
|
|
* musl libc hardcodes 2k and dietlibc uses PAGE_SIZE.
|
|
*/
|
|
#define XFS_READDIR_BUFSIZE (32768)
|
|
|
|
unsigned char xfs_dir3_get_dtype(struct xfs_mount *mp, uint8_t filetype);
|
|
|
|
#endif /* __XFS_DIR2_H__ */
|