1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *   Copyright (C) International Business Machines Corp., 2000-2004
18  * allocation map inode" (aka fileset inode):
21  * allocation map inode" (aka aggregate inode) where each inode
23  * on-disk inode in uniform way at both aggregate and fileset level;
33  *   mntvfs -> fileset ipimap+ -> aggregate ipbmap -> aggregate ipaimap;
34  *             fileset vfs     -> vp(1) <-> ... <-> vp(n) <->vproot;
58  * NAME:	jfs_mount(sb)
62  * PARAMETER:	sb	- super block
64  * RETURN:	-EBUSY	- device already mounted or open for write
65  *		-EBUSY	- cvrdvp already mounted;
66  *		-EBUSY	- mount table full
67  *		-ENOTDIR- cvrdvp not directory on a device mount
68  *		-ENXIO	- device open failure
72 	int rc = 0;		/* Return code */  in jfs_mount()  local
83 	if ((rc = chkSuper(sb))) {  in jfs_mount()
90 		rc = -EIO;  in jfs_mount()
93 	sbi->ipaimap = ipaimap;  in jfs_mount()
98 	 * initialize aggregate inode allocation map  in jfs_mount()
100 	if ((rc = diMount(ipaimap))) {  in jfs_mount()
101 		jfs_err("jfs_mount: diMount(ipaimap) failed w/rc = %d", rc);  in jfs_mount()
106 	 * open aggregate block allocation map  in jfs_mount()
110 		rc = -EIO;  in jfs_mount()
116 	sbi->ipbmap = ipbmap;  in jfs_mount()
119 	 * initialize aggregate block allocation map  in jfs_mount()
121 	if ((rc = dbMount(ipbmap))) {  in jfs_mount()
122 		jfs_err("jfs_mount: dbMount failed w/rc = %d", rc);  in jfs_mount()
127 	 * open the secondary aggregate inode allocation map  in jfs_mount()
129 	 * This is a duplicate of the aggregate inode allocation map.  in jfs_mount()
137 	if ((sbi->mntflag & JFS_BAD_SAIT) == 0) {  in jfs_mount()
141 			rc = -EIO;  in jfs_mount()
144 		sbi->ipaimap2 = ipaimap2;  in jfs_mount()
149 		 * initialize secondary aggregate inode allocation map  in jfs_mount()
151 		if ((rc = diMount(ipaimap2))) {  in jfs_mount()
152 			jfs_err("jfs_mount: diMount(ipaimap2) failed, rc = %d",  in jfs_mount()
153 				rc);  in jfs_mount()
158 		sbi->ipaimap2 = NULL;  in jfs_mount()
164 	 * open fileset inode allocation map (aka fileset inode)  in jfs_mount()
169 		/* open fileset secondary inode allocation map */  in jfs_mount()
170 		rc = -EIO;  in jfs_mount()
175 	/* map further access of per fileset inodes by the fileset inode */  in jfs_mount()
176 	sbi->ipimap = ipimap;  in jfs_mount()
178 	/* initialize fileset inode allocation map */  in jfs_mount()
179 	if ((rc = diMount(ipimap))) {  in jfs_mount()
180 		jfs_err("jfs_mount: diMount failed w/rc = %d", rc);  in jfs_mount()
189       errout41:		/* close fileset inode allocation map inode */  in jfs_mount()
194 	/* close secondary aggregate inode allocation map */  in jfs_mount()
202 	/* close aggregate block allocation map */  in jfs_mount()
206       errout22:		/* close aggregate inode allocation map */  in jfs_mount()
216 	if (rc)  in jfs_mount()
217 		jfs_err("Mount JFS Failure: %d", rc);  in jfs_mount()
219 	return rc;  in jfs_mount()
223  * NAME:	jfs_mount_rw(sb, remount)
225  * FUNCTION:	Completes read-write mount, or remounts read-only volume
226  *		as read-write
231 	int rc;  in jfs_mount_rw()  local
234 	 * If we are re-mounting a previously read-only volume, we want to  in jfs_mount_rw()
235 	 * re-read the inode and block maps, since fsck.jfs may have updated  in jfs_mount_rw()
239 		if (chkSuper(sb) || (sbi->state != FM_CLEAN))  in jfs_mount_rw()
240 			return -EINVAL;  in jfs_mount_rw()
242 		truncate_inode_pages(sbi->ipimap->i_mapping, 0);  in jfs_mount_rw()
243 		truncate_inode_pages(sbi->ipbmap->i_mapping, 0);  in jfs_mount_rw()
244 		diUnmount(sbi->ipimap, 1);  in jfs_mount_rw()
245 		if ((rc = diMount(sbi->ipimap))) {  in jfs_mount_rw()
247 			return rc;  in jfs_mount_rw()
250 		dbUnmount(sbi->ipbmap, 1);  in jfs_mount_rw()
251 		if ((rc = dbMount(sbi->ipbmap))) {  in jfs_mount_rw()
253 			return rc;  in jfs_mount_rw()
260 	if ((rc = lmLogOpen(sb)))  in jfs_mount_rw()
261 		return rc;  in jfs_mount_rw()
266 	if ((rc = updateSuper(sb, FM_MOUNT))) {  in jfs_mount_rw()
267 		jfs_err("jfs_mount: updateSuper failed w/rc = %d", rc);  in jfs_mount_rw()
269 		return rc;  in jfs_mount_rw()
277 	return rc;  in jfs_mount_rw()
292 	int rc = 0;  in chkSuper()  local
302 	if ((rc = readSuper(sb, &bh)))  in chkSuper()
303 		return rc;  in chkSuper()
304 	j_sb = (struct jfs_superblock *)bh->b_data;  in chkSuper()
310 	if (strncmp(j_sb->s_magic, JFS_MAGIC, 4) ||  in chkSuper()
311 	    le32_to_cpu(j_sb->s_version) > JFS_VERSION) {  in chkSuper()
312 		rc = -EINVAL;  in chkSuper()
316 	bsize = le32_to_cpu(j_sb->s_bsize);  in chkSuper()
320 		rc = -EINVAL;  in chkSuper()
326 		 le32_to_cpu(j_sb->s_flag), le32_to_cpu(j_sb->s_state),  in chkSuper()
327 		 (unsigned long long) le64_to_cpu(j_sb->s_size));  in chkSuper()
330 	if ((j_sb->s_flag & cpu_to_le32(JFS_BAD_SAIT)) !=  in chkSuper()
333 		AIM_bytesize = lengthPXD(&(j_sb->s_aim2)) * bsize;  in chkSuper()
335 		AIT_bytesize = lengthPXD(&(j_sb->s_ait2)) * bsize;  in chkSuper()
336 		AIM_byte_addr = addressPXD(&(j_sb->s_aim2)) * bsize;  in chkSuper()
337 		AIT_byte_addr = addressPXD(&(j_sb->s_ait2)) * bsize;  in chkSuper()
338 		byte_addr_diff0 = AIT_byte_addr - AIM_byte_addr;  in chkSuper()
339 		fsckwsp_addr = addressPXD(&(j_sb->s_fsckpxd)) * bsize;  in chkSuper()
340 		byte_addr_diff1 = fsckwsp_addr - AIT_byte_addr;  in chkSuper()
345 			j_sb->s_flag |= cpu_to_le32(JFS_BAD_SAIT);  in chkSuper()
348 	if ((j_sb->s_flag & cpu_to_le32(JFS_GROUPCOMMIT)) !=  in chkSuper()
350 		j_sb->s_flag |= cpu_to_le32(JFS_GROUPCOMMIT);  in chkSuper()
353 	if (j_sb->s_state != cpu_to_le32(FM_CLEAN) &&  in chkSuper()
356 		rc = -EINVAL;  in chkSuper()
360 	sbi->state = le32_to_cpu(j_sb->s_state);  in chkSuper()
361 	sbi->mntflag = le32_to_cpu(j_sb->s_flag);  in chkSuper()
367 	sbi->bsize = bsize;  in chkSuper()
368 	sbi->l2bsize = le16_to_cpu(j_sb->s_l2bsize);  in chkSuper()
371 	if (sbi->l2bsize != ilog2((u32)bsize) ||  in chkSuper()
372 	    j_sb->pad != 0 ||  in chkSuper()
373 	    le32_to_cpu(j_sb->s_state) > FM_STATE_MAX) {  in chkSuper()
374 		rc = -EINVAL;  in chkSuper()
383 	sbi->nbperpage = PSIZE >> sbi->l2bsize;  in chkSuper()
384 	sbi->l2nbperpage = L2PSIZE - sbi->l2bsize;  in chkSuper()
385 	sbi->l2niperblk = sbi->l2bsize - L2DISIZE;  in chkSuper()
386 	if (sbi->mntflag & JFS_INLINELOG)  in chkSuper()
387 		sbi->logpxd = j_sb->s_logpxd;  in chkSuper()
389 		sbi->logdev = new_decode_dev(le32_to_cpu(j_sb->s_logdev));  in chkSuper()
390 		uuid_copy(&sbi->uuid, &j_sb->s_uuid);  in chkSuper()
391 		uuid_copy(&sbi->loguuid, &j_sb->s_loguuid);  in chkSuper()
393 	sbi->fsckpxd = j_sb->s_fsckpxd;  in chkSuper()
394 	sbi->ait2 = j_sb->s_ait2;  in chkSuper()
398 	return rc;  in chkSuper()
405  * update synchronously superblock if it is mounted read-write.
412 	int rc;  in updateSuper()  local
414 	if (sbi->flag & JFS_NOINTEGRITY) {  in updateSuper()
416 			sbi->p_state = state;  in updateSuper()
419 			sbi->p_state = sbi->state;  in updateSuper()
422 			state = sbi->p_state;  in updateSuper()
425 	} else if (sbi->state == FM_DIRTY)  in updateSuper()
428 	if ((rc = readSuper(sb, &bh)))  in updateSuper()
429 		return rc;  in updateSuper()
431 	j_sb = (struct jfs_superblock *)bh->b_data;  in updateSuper()
433 	j_sb->s_state = cpu_to_le32(state);  in updateSuper()
434 	sbi->state = state;  in updateSuper()
438 		j_sb->s_logdev = cpu_to_le32(new_encode_dev(sbi->log->bdev->bd_dev));  in updateSuper()
439 		j_sb->s_logserial = cpu_to_le32(sbi->log->serial);  in updateSuper()
445 		if (j_sb->s_flag & cpu_to_le32(JFS_DASD_ENABLED))  in updateSuper()
446 			j_sb->s_flag |= cpu_to_le32(JFS_DASD_PRIME);  in updateSuper()
465 	*bpp = sb_bread(sb, SUPER1_OFF >> sb->s_blocksize_bits);  in readSuper()
470 	*bpp = sb_bread(sb, SUPER2_OFF >> sb->s_blocksize_bits);  in readSuper()
474 	return -EIO;  in readSuper()
490  * to update block allocation map at aggregate level.
494 	struct jfs_log *log = JFS_SBI(sb)->log;  in logMOUNT()
501 	lrd.aggregate = cpu_to_le32(new_encode_dev(sb->s_bdev->bd_dev));  in logMOUNT()