fs/jfs/jfs_logmgr.h

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  *   Copyright (C) International Business Machines Corp., 2000-2004
4  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
36  * blocks 2 - (N-1) are used to contain log records.
38  * when a volume group is varied-on-line, logRedo() must have
61 	__le32 flag;		/* 4: option */  member
62 	__le32 state;		/* 4: state - see below */
65 	uuid_t uuid;		/* 16: 128-bit journal uuid */
72 /* log flag: commit option (see jfs_filsys.h) */
113 		__le16 eor;	/* 2: end-of-log offset of lasrt record write */
116 	__le32 data[LOGPSIZE / 4 - 4];	/* log record area */
139  * in main-memory.)
143  * the data area is rounded up to an integral number of 4-bytes and
145  * the descriptor is of size of multiple of 4-bytes and aligned on a
146  * 4-byte boundary.
207 		 * transaction commit: no type-dependent information;
211 		 *	REDOPAGE: after-image
213 		 * apply after-image;
222 			pxd_t pxd;	/* 8: on-disk page pxd */
228 		 * do not apply after-image records which precede this record
238 			pxd_t pxd;	/* 8: on-disk page pxd */
244 		 * either in-line PXD,
245 		 * or     out-of-line  XADLIST;
260 		 * do not apply after-image records which precede this
272 			pxd_t pxd;	/* 8: on-disk page pxd */
276 		 *	SYNCPT: log sync point
281 			__le32 sync;	/* 4: syncpt address (0 = here) */  member
287 		 * file system mount: no type-dependent information;
310 		 * (last to be read in logredo()) - it prevents
312 		 * of the inumber esp. the on-disk inode itself.
328 			pxd_t pxd;	/* 8: on-disk page pxd */
334 		 * no type-dependent information
355 	struct list_head sb_list;/*  This is used to sync metadata
366 	unsigned long flag;	/* 4: flag */  member
392 	int lsn;		/* 4: end-of-log */
395 	int sync;		/* 4: addr from last logsync() */  member
400 	uuid_t uuid;		/* 16: 128-bit uuid of log device */
402 	int no_integrity;	/* 3: flag to disable journaling to disk */
406  * Log flag
414  * group commit flag
467 	u16 flag;		/* only meaninful in tblock */  member
470 	struct list_head synclist;	/* log sync list link */
477 #define LOGSYNC_LOCK_INIT(log) spin_lock_init(&(log)->synclock)
478 #define LOGSYNC_LOCK(log, flags) spin_lock_irqsave(&(log)->synclock, flags)
480 	spin_unlock_irqrestore(&(log)->synclock, flags)
482 /* compute the difference in bytes of lsn from sync point */
485 	diff = (lsn) - (log)->syncpt;\
487 		diff += (log)->logsize;\