[mirror_ubuntu-jammy-kernel.git] / fs / jfs / jfs_umount.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   Copyright (C) International Business Machines Corp., 2000-2004
 */

/*
 *	jfs_umount.c
 *
 * note: file system in transition to aggregate/fileset:
 * (ref. jfs_mount.c)
 *
 * file system unmount is interpreted as mount of the single/only
 * fileset in the aggregate and, if unmount of the last fileset,
 * as unmount of the aggerate;
 */

#include <linux/fs.h>
#include "jfs_incore.h"
#include "jfs_filsys.h"
#include "jfs_superblock.h"
#include "jfs_dmap.h"
#include "jfs_imap.h"
#include "jfs_metapage.h"
#include "jfs_debug.h"

/*
 * NAME:	jfs_umount(vfsp, flags, crp)
 *
 * FUNCTION:	vfs_umount()
 *
 * PARAMETERS:	vfsp	- virtual file system pointer
 *		flags	- unmount for shutdown
 *		crp	- credential
 *
 * RETURN :	EBUSY	- device has open files
 */
int jfs_umount(struct super_block *sb)
{
	struct jfs_sb_info *sbi = JFS_SBI(sb);
	struct inode *ipbmap = sbi->ipbmap;
	struct inode *ipimap = sbi->ipimap;
	struct inode *ipaimap = sbi->ipaimap;
	struct inode *ipaimap2 = sbi->ipaimap2;
	struct jfs_log *log;
	int rc = 0;

	jfs_info("UnMount JFS: sb:0x%p", sb);

	/*
	 *	update superblock and close log
	 *
	 * if mounted read-write and log based recovery was enabled
	 */
	if ((log = sbi->log))
		/*
		 * Wait for outstanding transactions to be written to log:
		 */
		jfs_flush_journal(log, 2);

	/*
	 * close fileset inode allocation map (aka fileset inode)
	 */
	diUnmount(ipimap, 0);

	diFreeSpecial(ipimap);
	sbi->ipimap = NULL;

	/*
	 * close secondary aggregate inode allocation map
	 */
	ipaimap2 = sbi->ipaimap2;
	if (ipaimap2) {
		diUnmount(ipaimap2, 0);
		diFreeSpecial(ipaimap2);
		sbi->ipaimap2 = NULL;
	}

	/*
	 * close aggregate inode allocation map
	 */
	ipaimap = sbi->ipaimap;
	diUnmount(ipaimap, 0);
	diFreeSpecial(ipaimap);
	sbi->ipaimap = NULL;

	/*
	 * close aggregate block allocation map
	 */
	dbUnmount(ipbmap, 0);

	diFreeSpecial(ipbmap);
	sbi->ipimap = NULL;

	/*
	 * Make sure all metadata makes it to disk before we mark
	 * the superblock as clean
	 */
	filemap_write_and_wait(sbi->direct_inode->i_mapping);

	/*
	 * ensure all file system file pages are propagated to their
	 * home blocks on disk (and their in-memory buffer pages are
	 * invalidated) BEFORE updating file system superblock state
	 * (to signify file system is unmounted cleanly, and thus in
	 * consistent state) and log superblock active file system
	 * list (to signify skip logredo()).
	 */
	if (log) {		/* log = NULL if read-only mount */
		updateSuper(sb, FM_CLEAN);

		/*
		 * close log:
		 *
		 * remove file system from log active file system list.
		 */
		rc = lmLogClose(sb);
	}
	jfs_info("UnMount JFS Complete: rc = %d", rc);
	return rc;
}


int jfs_umount_rw(struct super_block *sb)
{
	struct jfs_sb_info *sbi = JFS_SBI(sb);
	struct jfs_log *log = sbi->log;

	if (!log)
		return 0;

	/*
	 * close log:
	 *
	 * remove file system from log active file system list.
	 */
	jfs_flush_journal(log, 2);

	/*
	 * Make sure all metadata makes it to disk
	 */
	dbSync(sbi->ipbmap);
	diSync(sbi->ipimap);

	/*
	 * Note that we have to do this even if sync_blockdev() will
	 * do exactly the same a few instructions later:  We can't
	 * mark the superblock clean before everything is flushed to
	 * disk.
	 */
	filemap_write_and_wait(sbi->direct_inode->i_mapping);

	updateSuper(sb, FM_CLEAN);

	return lmLogClose(sb);
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
1da177e4 LT	3	* Copyright (C) International Business Machines Corp., 2000-2004
1da177e4 LT	4	*/
	5
	6	/*
	7	* jfs_umount.c
	8	*
	9	* note: file system in transition to aggregate/fileset:
	10	* (ref. jfs_mount.c)
	11	*
63f83c9f DK	12	* file system unmount is interpreted as mount of the single/only
63f83c9f DK	13	* fileset in the aggregate and, if unmount of the last fileset,
1da177e4 LT	14	* as unmount of the aggerate;
	15	*/
	16
	17	#include <linux/fs.h>
	18	#include "jfs_incore.h"
	19	#include "jfs_filsys.h"
	20	#include "jfs_superblock.h"
	21	#include "jfs_dmap.h"
	22	#include "jfs_imap.h"
	23	#include "jfs_metapage.h"
	24	#include "jfs_debug.h"
	25
	26	/*
	27	* NAME: jfs_umount(vfsp, flags, crp)
	28	*
	29	* FUNCTION: vfs_umount()
	30	*
	31	* PARAMETERS: vfsp - virtual file system pointer
	32	* flags - unmount for shutdown
	33	* crp - credential
	34	*
	35	* RETURN : EBUSY - device has open files
	36	*/
	37	int jfs_umount(struct super_block *sb)
	38	{
1da177e4 LT	39	struct jfs_sb_info *sbi = JFS_SBI(sb);
	40	struct inode *ipbmap = sbi->ipbmap;
	41	struct inode *ipimap = sbi->ipimap;
	42	struct inode *ipaimap = sbi->ipaimap;
	43	struct inode *ipaimap2 = sbi->ipaimap2;
	44	struct jfs_log *log;
	45	int rc = 0;
	46
	47	jfs_info("UnMount JFS: sb:0x%p", sb);
	48
	49	/*
f720e3ba	50	* update superblock and close log
1da177e4 LT	51	*
	52	* if mounted read-write and log based recovery was enabled
	53	*/
	54	if ((log = sbi->log))
	55	/*
63f83c9f	56	* Wait for outstanding transactions to be written to log:
1da177e4	57	*/
1c8007b0	58	jfs_flush_journal(log, 2);
1da177e4 LT	59
	60	/*
	61	* close fileset inode allocation map (aka fileset inode)
	62	*/
	63	diUnmount(ipimap, 0);
	64
	65	diFreeSpecial(ipimap);
	66	sbi->ipimap = NULL;
	67
	68	/*
	69	* close secondary aggregate inode allocation map
	70	*/
	71	ipaimap2 = sbi->ipaimap2;
	72	if (ipaimap2) {
	73	diUnmount(ipaimap2, 0);
	74	diFreeSpecial(ipaimap2);
	75	sbi->ipaimap2 = NULL;
	76	}
	77
	78	/*
	79	* close aggregate inode allocation map
	80	*/
	81	ipaimap = sbi->ipaimap;
	82	diUnmount(ipaimap, 0);
	83	diFreeSpecial(ipaimap);
	84	sbi->ipaimap = NULL;
	85
	86	/*
	87	* close aggregate block allocation map
	88	*/
	89	dbUnmount(ipbmap, 0);
	90
	91	diFreeSpecial(ipbmap);
	92	sbi->ipimap = NULL;
	93
	94	/*
	95	* Make sure all metadata makes it to disk before we mark
	96	* the superblock as clean
	97	*/
28fd1298	98	filemap_write_and_wait(sbi->direct_inode->i_mapping);
1da177e4 LT	99
	100	/*
	101	* ensure all file system file pages are propagated to their
63f83c9f	102	* home blocks on disk (and their in-memory buffer pages are
1da177e4	103	* invalidated) BEFORE updating file system superblock state
63f83c9f DK	104	* (to signify file system is unmounted cleanly, and thus in
63f83c9f DK	105	* consistent state) and log superblock active file system
1da177e4 LT	106	* list (to signify skip logredo()).
	107	*/
	108	if (log) { /* log = NULL if read-only mount */
	109	updateSuper(sb, FM_CLEAN);
	110
1da177e4	111	/*
63f83c9f	112	* close log:
1da177e4 LT	113	*
	114	* remove file system from log active file system list.
	115	*/
	116	rc = lmLogClose(sb);
	117	}
	118	jfs_info("UnMount JFS Complete: rc = %d", rc);
	119	return rc;
	120	}
	121
	122
	123	int jfs_umount_rw(struct super_block *sb)
	124	{
1da177e4 LT	125	struct jfs_sb_info *sbi = JFS_SBI(sb);
	126	struct jfs_log *log = sbi->log;
	127
	128	if (!log)
	129	return 0;
	130
	131	/*
63f83c9f	132	* close log:
1da177e4 LT	133	*
	134	* remove file system from log active file system list.
	135	*/
1c8007b0	136	jfs_flush_journal(log, 2);
1da177e4 LT	137
	138	/*
	139	* Make sure all metadata makes it to disk
	140	*/
	141	dbSync(sbi->ipbmap);
	142	diSync(sbi->ipimap);
	143
	144	/*
	145	* Note that we have to do this even if sync_blockdev() will
	146	* do exactly the same a few instructions later: We can't
	147	* mark the superblock clean before everything is flushed to
	148	* disk.
	149	*/
28fd1298	150	filemap_write_and_wait(sbi->direct_inode->i_mapping);
1da177e4 LT	151
	152	updateSuper(sb, FM_CLEAN);
	153
1da177e4 LT	154	return lmLogClose(sb);
1da177e4 LT	155	}