1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *   Copyright (C) International Business Machines Corp., 2000-2004
4  */
5 #ifndef _H_JFS_TXNMGR
6 #define _H_JFS_TXNMGR
7 
8 #include "jfs_logmgr.h"
9 
10 /*
11  * Hide implementation of TxBlock and TxLock
12  */
13 #define tid_to_tblock(tid) (&TxBlock[tid])
14 
15 #define lid_to_tlock(lid) (&TxLock[lid])
16 
17 /*
18  *	transaction block
19  */
20 struct tblock {
21 	/*
22 	 * tblock and jbuf_t common area: struct logsyncblk
23 	 *
24 	 * the following 5 fields are the same as struct logsyncblk
25 	 * which is common to tblock and jbuf to form logsynclist
26 	 */
27 	u16 xflag;		/* tx commit type */
28 	u16 flag;		/* tx commit state */
29 	lid_t dummy;		/* Must keep structures common */
30 	s32 lsn;		/* recovery lsn */
31 	struct list_head synclist;	/* logsynclist link */
32 
33 	/* lock management */
34 	struct super_block *sb;	/* super block */
35 	lid_t next;		/* index of first tlock of tid */
36 	lid_t last;		/* index of last tlock of tid */
37 	wait_queue_head_t waitor;	/* tids waiting on this tid */
38 
39 	/* log management */
40 	u32 logtid;		/* log transaction id */
41 
42 	/* commit management */
43 	struct list_head cqueue;	/* commit queue list */
44 	s32 clsn;		/* commit lsn */
45 	struct lbuf *bp;
46 	s32 pn;			/* commit record log page number */
47 	s32 eor;		/* commit record eor */
48 	wait_queue_head_t gcwait;	/* group commit event list:
49 					 * ready transactions wait on this
50 					 * event for group commit completion.
51 					 */
52 	union {
53 		struct inode *ip; /* inode being deleted */
54 		pxd_t ixpxd;	/* pxd of inode extent for created inode */
55 	} u;
56 	u32 ino;		/* inode number being created */
57 };
58 
59 extern struct tblock *TxBlock;	/* transaction block table */
60 
61 /* commit flags: tblk->xflag */
62 #define	COMMIT_SYNC	0x0001	/* synchronous commit */
63 #define	COMMIT_FORCE	0x0002	/* force pageout at end of commit */
64 #define	COMMIT_FLUSH	0x0004	/* init flush at end of commit */
65 #define COMMIT_MAP	0x00f0
66 #define	COMMIT_PMAP	0x0010	/* update pmap */
67 #define	COMMIT_WMAP	0x0020	/* update wmap */
68 #define	COMMIT_PWMAP	0x0040	/* update pwmap */
69 #define	COMMIT_FREE	0x0f00
70 #define	COMMIT_DELETE	0x0100	/* inode delete */
71 #define	COMMIT_TRUNCATE	0x0200	/* file truncation */
72 #define	COMMIT_CREATE	0x0400	/* inode create */
73 #define	COMMIT_LAZY	0x0800	/* lazy commit */
74 #define COMMIT_PAGE	0x1000	/* Identifies element as metapage */
75 #define COMMIT_INODE	0x2000	/* Identifies element as inode */
76 
77 /* group commit flags tblk->flag: see jfs_logmgr.h */
78 
79 /*
80  *	transaction lock
81  */
82 struct tlock {
83 	lid_t next;		/* 2: index next lockword on tid locklist
84 				 *	    next lockword on freelist
85 				 */
86 	tid_t tid;		/* 2: transaction id holding lock */
87 
88 	u16 flag;		/* 2: lock control */
89 	u16 type;		/* 2: log type */
90 
91 	struct metapage *mp;	/* 4/8: object page buffer locked */
92 	struct inode *ip;	/* 4/8: object */
93 	/* (16) */
94 
95 	s16 lock[24];		/* 48: overlay area */
96 };				/* (64) */
97 
98 extern struct tlock *TxLock;	/* transaction lock table */
99 
100 /*
101  * tlock flag
102  */
103 /* txLock state */
104 #define tlckPAGELOCK		0x8000
105 #define tlckINODELOCK		0x4000
106 #define tlckLINELOCK		0x2000
107 #define tlckINLINELOCK		0x1000
108 /* lmLog state */
109 #define tlckLOG			0x0800
110 /* updateMap state */
111 #define	tlckUPDATEMAP		0x0080
112 #define	tlckDIRECTORY		0x0040
113 /* freeLock state */
114 #define tlckFREELOCK		0x0008
115 #define tlckWRITEPAGE		0x0004
116 #define tlckFREEPAGE		0x0002
117 
118 /*
119  * tlock type
120  */
121 #define	tlckTYPE		0xfe00
122 #define	tlckINODE		0x8000
123 #define	tlckXTREE		0x4000
124 #define	tlckDTREE		0x2000
125 #define	tlckMAP			0x1000
126 #define	tlckEA			0x0800
127 #define	tlckACL			0x0400
128 #define	tlckDATA		0x0200
129 #define	tlckBTROOT		0x0100
130 
131 #define	tlckOPERATION		0x00ff
132 #define tlckGROW		0x0001	/* file grow */
133 #define tlckREMOVE		0x0002	/* file delete */
134 #define tlckTRUNCATE		0x0004	/* file truncate */
135 #define tlckRELOCATE		0x0008	/* file/directory relocate */
136 #define tlckENTRY		0x0001	/* directory insert/delete */
137 #define tlckEXTEND		0x0002	/* directory extend in-line */
138 #define tlckSPLIT		0x0010	/* splited page */
139 #define tlckNEW			0x0020	/* new page from split */
140 #define tlckFREE		0x0040	/* free page */
141 #define tlckRELINK		0x0080	/* update sibling pointer */
142 
143 /*
144  *	linelock for lmLog()
145  *
146  * note: linelock and its variations are overlaid
147  * at tlock.lock: watch for alignment;
148  */
149 struct lv {
150 	u8 offset;		/* 1: */
151 	u8 length;		/* 1: */
152 };				/* (2) */
153 
154 #define	TLOCKSHORT	20
155 #define	TLOCKLONG	28
156 
157 struct linelock {
158 	lid_t next;		/* 2: next linelock */
159 
160 	s8 maxcnt;		/* 1: */
161 	s8 index;		/* 1: */
162 
163 	u16 flag;		/* 2: */
164 	u8 type;		/* 1: */
165 	u8 l2linesize;		/* 1: log2 of linesize */
166 	/* (8) */
167 
168 	struct lv lv[20];	/* 40: */
169 };				/* (48) */
170 
171 #define dt_lock	linelock
172 
173 struct xtlock {
174 	lid_t next;		/* 2: */
175 
176 	s8 maxcnt;		/* 1: */
177 	s8 index;		/* 1: */
178 
179 	u16 flag;		/* 2: */
180 	u8 type;		/* 1: */
181 	u8 l2linesize;		/* 1: log2 of linesize */
182 				/* (8) */
183 
184 	struct lv header;	/* 2: */
185 	struct lv lwm;		/* 2: low water mark */
186 	struct lv hwm;		/* 2: high water mark */
187 	struct lv twm;		/* 2: */
188 				/* (16) */
189 
190 	s32 pxdlock[8];		/* 32: */
191 };				/* (48) */
192 
193 
194 /*
195  *	maplock for txUpdateMap()
196  *
197  * note: maplock and its variations are overlaid
198  * at tlock.lock/linelock: watch for alignment;
199  * N.B. next field may be set by linelock, and should not
200  * be modified by maplock;
201  * N.B. index of the first pxdlock specifies index of next
202  * free maplock (i.e., number of maplock) in the tlock;
203  */
204 struct maplock {
205 	lid_t next;		/* 2: */
206 
207 	u8 maxcnt;		/* 2: */
208 	u8 index;		/* 2: next free maplock index */
209 
210 	u16 flag;		/* 2: */
211 	u8 type;		/* 1: */
212 	u8 count;		/* 1: number of pxd/xad */
213 				/* (8) */
214 
215 	pxd_t pxd;		/* 8: */
216 };				/* (16): */
217 
218 /* maplock flag */
219 #define	mlckALLOC		0x00f0
220 #define	mlckALLOCXADLIST	0x0080
221 #define	mlckALLOCPXDLIST	0x0040
222 #define	mlckALLOCXAD		0x0020
223 #define	mlckALLOCPXD		0x0010
224 #define	mlckFREE		0x000f
225 #define	mlckFREEXADLIST		0x0008
226 #define	mlckFREEPXDLIST		0x0004
227 #define	mlckFREEXAD		0x0002
228 #define	mlckFREEPXD		0x0001
229 
230 #define	pxd_lock	maplock
231 
232 struct xdlistlock {
233 	lid_t next;		/* 2: */
234 
235 	u8 maxcnt;		/* 2: */
236 	u8 index;		/* 2: */
237 
238 	u16 flag;		/* 2: */
239 	u8 type;		/* 1: */
240 	u8 count;		/* 1: number of pxd/xad */
241 				/* (8) */
242 
243 	/*
244 	 * We need xdlist to be 64 bits (8 bytes), regardless of
245 	 * whether void * is 32 or 64 bits
246 	 */
247 	union {
248 		void *_xdlist;	/* pxd/xad list */
249 		s64 pad;	/* 8: Force 64-bit xdlist size */
250 	} union64;
251 };				/* (16): */
252 
253 #define xdlist union64._xdlist
254 
255 /*
256  *	commit
257  *
258  * parameter to the commit manager routines
259  */
260 struct commit {
261 	tid_t tid;		/* tid = index of tblock */
262 	int flag;		/* flags */
263 	struct jfs_log *log;	/* log */
264 	struct super_block *sb;	/* superblock */
265 
266 	int nip;		/* number of entries in iplist */
267 	struct inode **iplist;	/* list of pointers to inodes */
268 
269 	/* log record descriptor on 64-bit boundary */
270 	struct lrd lrd;		/* : log record descriptor */
271 };
272 
273 /*
274  * external declarations
275  */
276 extern int jfs_tlocks_low;
277 
278 extern int txInit(void);
279 extern void txExit(void);
280 extern struct tlock *txLock(tid_t, struct inode *, struct metapage *, int);
281 extern struct tlock *txMaplock(tid_t, struct inode *, int);
282 extern int txCommit(tid_t, int, struct inode **, int);
283 extern tid_t txBegin(struct super_block *, int);
284 extern void txBeginAnon(struct super_block *);
285 extern void txEnd(tid_t);
286 extern void txAbort(tid_t, int);
287 extern struct linelock *txLinelock(struct linelock *);
288 extern void txFreeMap(struct inode *, struct maplock *, struct tblock *, int);
289 extern void txEA(tid_t, struct inode *, dxd_t *, dxd_t *);
290 extern void txFreelock(struct inode *);
291 extern int lmLog(struct jfs_log *, struct tblock *, struct lrd *,
292 		 struct tlock *);
293 extern void txQuiesce(struct super_block *);
294 extern void txResume(struct super_block *);
295 extern void txLazyUnlock(struct tblock *);
296 extern int jfs_lazycommit(void *);
297 extern int jfs_sync(void *);
298 #endif				/* _H_JFS_TXNMGR */
299