cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

jfs_imap.h (5907B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 *   Copyright (C) International Business Machines Corp., 2000-2002
      4 */
      5#ifndef	_H_JFS_IMAP
      6#define _H_JFS_IMAP
      7
      8#include "jfs_txnmgr.h"
      9
     10/*
     11 *	jfs_imap.h: disk inode manager
     12 */
     13
     14#define	EXTSPERIAG	128	/* number of disk inode extent per iag	*/
     15#define IMAPBLKNO	0	/* lblkno of dinomap within inode map	*/
     16#define SMAPSZ		4	/* number of words per summary map	*/
     17#define	EXTSPERSUM	32	/* number of extents per summary map entry */
     18#define	L2EXTSPERSUM	5	/* l2 number of extents per summary map */
     19#define	PGSPERIEXT	4	/* number of 4K pages per dinode extent */
     20#define	MAXIAGS		((1<<20)-1)	/* maximum number of iags	*/
     21#define	MAXAG		128	/* maximum number of allocation groups	*/
     22
     23#define AMAPSIZE	512	/* bytes in the IAG allocation maps */
     24#define SMAPSIZE	16	/* bytes in the IAG summary maps */
     25
     26/* convert inode number to iag number */
     27#define	INOTOIAG(ino)	((ino) >> L2INOSPERIAG)
     28
     29/* convert iag number to logical block number of the iag page */
     30#define IAGTOLBLK(iagno,l2nbperpg)	(((iagno) + 1) << (l2nbperpg))
     31
     32/* get the starting block number of the 4K page of an inode extent
     33 * that contains ino.
     34 */
     35#define INOPBLK(pxd,ino,l2nbperpg)	(addressPXD((pxd)) +		\
     36	((((ino) & (INOSPEREXT-1)) >> L2INOSPERPAGE) << (l2nbperpg)))
     37
     38/*
     39 *	inode allocation map:
     40 *
     41 * inode allocation map consists of
     42 * . the inode map control page and
     43 * . inode allocation group pages (per 4096 inodes)
     44 * which are addressed by standard JFS xtree.
     45 */
     46/*
     47 *	inode allocation group page (per 4096 inodes of an AG)
     48 */
     49struct iag {
     50	__le64 agstart;		/* 8: starting block of ag		*/
     51	__le32 iagnum;		/* 4: inode allocation group number	*/
     52	__le32 inofreefwd;	/* 4: ag inode free list forward	*/
     53	__le32 inofreeback;	/* 4: ag inode free list back		*/
     54	__le32 extfreefwd;	/* 4: ag inode extent free list forward	*/
     55	__le32 extfreeback;	/* 4: ag inode extent free list back	*/
     56	__le32 iagfree;		/* 4: iag free list			*/
     57
     58	/* summary map: 1 bit per inode extent */
     59	__le32 inosmap[SMAPSZ];	/* 16: sum map of mapwords w/ free inodes;
     60				 *	note: this indicates free and backed
     61				 *	inodes, if the extent is not backed the
     62				 *	value will be 1.  if the extent is
     63				 *	backed but all inodes are being used the
     64				 *	value will be 1.  if the extent is
     65				 *	backed but at least one of the inodes is
     66				 *	free the value will be 0.
     67				 */
     68	__le32 extsmap[SMAPSZ];	/* 16: sum map of mapwords w/ free extents */
     69	__le32 nfreeinos;	/* 4: number of free inodes		*/
     70	__le32 nfreeexts;	/* 4: number of free extents		*/
     71	/* (72) */
     72	u8 pad[1976];		/* 1976: pad to 2048 bytes */
     73	/* allocation bit map: 1 bit per inode (0 - free, 1 - allocated) */
     74	__le32 wmap[EXTSPERIAG];	/* 512: working allocation map */
     75	__le32 pmap[EXTSPERIAG];	/* 512: persistent allocation map */
     76	pxd_t inoext[EXTSPERIAG];	/* 1024: inode extent addresses */
     77};				/* (4096) */
     78
     79/*
     80 *	per AG control information (in inode map control page)
     81 */
     82struct iagctl_disk {
     83	__le32 inofree;		/* 4: free inode list anchor		*/
     84	__le32 extfree;		/* 4: free extent list anchor		*/
     85	__le32 numinos;		/* 4: number of backed inodes		*/
     86	__le32 numfree;		/* 4: number of free inodes		*/
     87};				/* (16) */
     88
     89struct iagctl {
     90	int inofree;		/* free inode list anchor		*/
     91	int extfree;		/* free extent list anchor		*/
     92	int numinos;		/* number of backed inodes		*/
     93	int numfree;		/* number of free inodes		*/
     94};
     95
     96/*
     97 *	per fileset/aggregate inode map control page
     98 */
     99struct dinomap_disk {
    100	__le32 in_freeiag;	/* 4: free iag list anchor	*/
    101	__le32 in_nextiag;	/* 4: next free iag number	*/
    102	__le32 in_numinos;	/* 4: num of backed inodes	*/
    103	__le32 in_numfree;	/* 4: num of free backed inodes */
    104	__le32 in_nbperiext;	/* 4: num of blocks per inode extent */
    105	__le32 in_l2nbperiext;	/* 4: l2 of in_nbperiext	*/
    106	__le32 in_diskblock;	/* 4: for standalone test driver */
    107	__le32 in_maxag;	/* 4: for standalone test driver */
    108	u8 pad[2016];		/* 2016: pad to 2048		*/
    109	struct iagctl_disk in_agctl[MAXAG]; /* 2048: AG control information */
    110};				/* (4096) */
    111
    112struct dinomap {
    113	int in_freeiag;		/* free iag list anchor		*/
    114	int in_nextiag;		/* next free iag number		*/
    115	int in_numinos;		/* num of backed inodes		*/
    116	int in_numfree;		/* num of free backed inodes	*/
    117	int in_nbperiext;	/* num of blocks per inode extent */
    118	int in_l2nbperiext;	/* l2 of in_nbperiext		*/
    119	int in_diskblock;	/* for standalone test driver	*/
    120	int in_maxag;		/* for standalone test driver	*/
    121	struct iagctl in_agctl[MAXAG];	/* AG control information */
    122};
    123
    124/*
    125 *	In-core inode map control page
    126 */
    127struct inomap {
    128	struct dinomap im_imap;		/* 4096: inode allocation control */
    129	struct inode *im_ipimap;	/* 4: ptr to inode for imap	*/
    130	struct mutex im_freelock;	/* 4: iag free list lock	*/
    131	struct mutex im_aglock[MAXAG];	/* 512: per AG locks		*/
    132	u32 *im_DBGdimap;
    133	atomic_t im_numinos;	/* num of backed inodes */
    134	atomic_t im_numfree;	/* num of free backed inodes */
    135};
    136
    137#define	im_freeiag	im_imap.in_freeiag
    138#define	im_nextiag	im_imap.in_nextiag
    139#define	im_agctl	im_imap.in_agctl
    140#define	im_nbperiext	im_imap.in_nbperiext
    141#define	im_l2nbperiext	im_imap.in_l2nbperiext
    142
    143/* for standalone testdriver
    144 */
    145#define	im_diskblock	im_imap.in_diskblock
    146#define	im_maxag	im_imap.in_maxag
    147
    148extern int diFree(struct inode *);
    149extern int diAlloc(struct inode *, bool, struct inode *);
    150extern int diSync(struct inode *);
    151/* external references */
    152extern int diUpdatePMap(struct inode *ipimap, unsigned long inum,
    153			bool is_free, struct tblock * tblk);
    154extern int diExtendFS(struct inode *ipimap, struct inode *ipbmap);
    155extern int diMount(struct inode *);
    156extern int diUnmount(struct inode *, int);
    157extern int diRead(struct inode *);
    158extern struct inode *diReadSpecial(struct super_block *, ino_t, int);
    159extern void diWriteSpecial(struct inode *, int);
    160extern void diFreeSpecial(struct inode *);
    161extern int diWrite(tid_t tid, struct inode *);
    162#endif				/* _H_JFS_IMAP */