fs/jfs/jfs_mount.c

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;
57  * NAME:	jfs_mount(sb)
61  * PARAMETER:	sb	- super block
63  * RETURN:	-EBUSY	- device already mounted or open for write
64  *		-EBUSY	- cvrdvp already mounted;
65  *		-EBUSY	- mount table full
66  *		-ENOTDIR- cvrdvp not directory on a device mount
67  *		-ENXIO	- device open failure
71 	int rc = 0;		/* Return code */  in jfs_mount()  local
82 	if ((rc = chkSuper(sb))) {  in jfs_mount()
89 		rc = -EIO;  in jfs_mount()
92 	sbi->ipaimap = ipaimap;  in jfs_mount()
97 	 * initialize aggregate inode allocation map  in jfs_mount()
99 	if ((rc = diMount(ipaimap))) {  in jfs_mount()
100 		jfs_err("jfs_mount: diMount(ipaimap) failed w/rc = %d", rc);  in jfs_mount()
105 	 * open aggregate block allocation map  in jfs_mount()
109 		rc = -EIO;  in jfs_mount()
115 	sbi->ipbmap = ipbmap;  in jfs_mount()
118 	 * initialize aggregate block allocation map  in jfs_mount()
120 	if ((rc = dbMount(ipbmap))) {  in jfs_mount()
121 		jfs_err("jfs_mount: dbMount failed w/rc = %d", rc);  in jfs_mount()
126 	 * open the secondary aggregate inode allocation map  in jfs_mount()
128 	 * This is a duplicate of the aggregate inode allocation map.  in jfs_mount()
136 	if ((sbi->mntflag & JFS_BAD_SAIT) == 0) {  in jfs_mount()
140 			rc = -EIO;  in jfs_mount()
143 		sbi->ipaimap2 = ipaimap2;  in jfs_mount()
148 		 * initialize secondary aggregate inode allocation map  in jfs_mount()
150 		if ((rc = diMount(ipaimap2))) {  in jfs_mount()
151 			jfs_err("jfs_mount: diMount(ipaimap2) failed, rc = %d",  in jfs_mount()
152 				rc);  in jfs_mount()
157 		sbi->ipaimap2 = NULL;  in jfs_mount()
163 	 * open fileset inode allocation map (aka fileset inode)  in jfs_mount()
168 		/* open fileset secondary inode allocation map */  in jfs_mount()
169 		rc = -EIO;  in jfs_mount()
174 	/* map further access of per fileset inodes by the fileset inode */  in jfs_mount()
175 	sbi->ipimap = ipimap;  in jfs_mount()
177 	/* initialize fileset inode allocation map */  in jfs_mount()
178 	if ((rc = diMount(ipimap))) {  in jfs_mount()
179 		jfs_err("jfs_mount: diMount failed w/rc = %d", rc);  in jfs_mount()
188       errout41:		/* close fileset inode allocation map inode */  in jfs_mount()
193 	/* close secondary aggregate inode allocation map */  in jfs_mount()
201 	/* close aggregate block allocation map */  in jfs_mount()
205       errout22:		/* close aggregate inode allocation map */  in jfs_mount()
215 	if (rc)  in jfs_mount()
216 		jfs_err("Mount JFS Failure: %d", rc);  in jfs_mount()
218 	return rc;  in jfs_mount()
222  * NAME:	jfs_mount_rw(sb, remount)
224  * FUNCTION:	Completes read-write mount, or remounts read-only volume
225  *		as read-write
230 	int rc;  in jfs_mount_rw()  local
233 	 * If we are re-mounting a previously read-only volume, we want to  in jfs_mount_rw()
234 	 * re-read the inode and block maps, since fsck.jfs may have updated  in jfs_mount_rw()
238 		if (chkSuper(sb) || (sbi->state != FM_CLEAN))  in jfs_mount_rw()
239 			return -EINVAL;  in jfs_mount_rw()
241 		truncate_inode_pages(sbi->ipimap->i_mapping, 0);  in jfs_mount_rw()
242 		truncate_inode_pages(sbi->ipbmap->i_mapping, 0);  in jfs_mount_rw()
243 		diUnmount(sbi->ipimap, 1);  in jfs_mount_rw()
244 		if ((rc = diMount(sbi->ipimap))) {  in jfs_mount_rw()
246 			return rc;  in jfs_mount_rw()
249 		dbUnmount(sbi->ipbmap, 1);  in jfs_mount_rw()
250 		if ((rc = dbMount(sbi->ipbmap))) {  in jfs_mount_rw()
252 			return rc;  in jfs_mount_rw()
259 	if ((rc = lmLogOpen(sb)))  in jfs_mount_rw()
260 		return rc;  in jfs_mount_rw()
265 	if ((rc = updateSuper(sb, FM_MOUNT))) {  in jfs_mount_rw()
266 		jfs_err("jfs_mount: updateSuper failed w/rc = %d", rc);  in jfs_mount_rw()
268 		return rc;  in jfs_mount_rw()
276 	return rc;  in jfs_mount_rw()
291 	int rc = 0;  in chkSuper()  local
301 	if ((rc = readSuper(sb, &bh)))  in chkSuper()
302 		return rc;  in chkSuper()
303 	j_sb = (struct jfs_superblock *)bh->b_data;  in chkSuper()
309 	if (strncmp(j_sb->s_magic, JFS_MAGIC, 4) ||  in chkSuper()
310 	    le32_to_cpu(j_sb->s_version) > JFS_VERSION) {  in chkSuper()
311 		rc = -EINVAL;  in chkSuper()
315 	bsize = le32_to_cpu(j_sb->s_bsize);  in chkSuper()
319 		rc = -EINVAL;  in chkSuper()
325 		 le32_to_cpu(j_sb->s_flag), le32_to_cpu(j_sb->s_state),  in chkSuper()
326 		 (unsigned long long) le64_to_cpu(j_sb->s_size));  in chkSuper()
329 	if ((j_sb->s_flag & cpu_to_le32(JFS_BAD_SAIT)) !=  in chkSuper()
332 		AIM_bytesize = lengthPXD(&(j_sb->s_aim2)) * bsize;  in chkSuper()
334 		AIT_bytesize = lengthPXD(&(j_sb->s_ait2)) * bsize;  in chkSuper()
335 		AIM_byte_addr = addressPXD(&(j_sb->s_aim2)) * bsize;  in chkSuper()
336 		AIT_byte_addr = addressPXD(&(j_sb->s_ait2)) * bsize;  in chkSuper()
337 		byte_addr_diff0 = AIT_byte_addr - AIM_byte_addr;  in chkSuper()
338 		fsckwsp_addr = addressPXD(&(j_sb->s_fsckpxd)) * bsize;  in chkSuper()
339 		byte_addr_diff1 = fsckwsp_addr - AIT_byte_addr;  in chkSuper()
344 			j_sb->s_flag |= cpu_to_le32(JFS_BAD_SAIT);  in chkSuper()
347 	if ((j_sb->s_flag & cpu_to_le32(JFS_GROUPCOMMIT)) !=  in chkSuper()
349 		j_sb->s_flag |= cpu_to_le32(JFS_GROUPCOMMIT);  in chkSuper()
352 	if (j_sb->s_state != cpu_to_le32(FM_CLEAN) &&  in chkSuper()
355 		rc = -EINVAL;  in chkSuper()
359 	sbi->state = le32_to_cpu(j_sb->s_state);  in chkSuper()
360 	sbi->mntflag = le32_to_cpu(j_sb->s_flag);  in chkSuper()
366 	sbi->bsize = bsize;  in chkSuper()
367 	sbi->l2bsize = le16_to_cpu(j_sb->s_l2bsize);  in chkSuper()
373 	sbi->nbperpage = PSIZE >> sbi->l2bsize;  in chkSuper()
374 	sbi->l2nbperpage = L2PSIZE - sbi->l2bsize;  in chkSuper()
375 	sbi->l2niperblk = sbi->l2bsize - L2DISIZE;  in chkSuper()
376 	if (sbi->mntflag & JFS_INLINELOG)  in chkSuper()
377 		sbi->logpxd = j_sb->s_logpxd;  in chkSuper()
379 		sbi->logdev = new_decode_dev(le32_to_cpu(j_sb->s_logdev));  in chkSuper()
380 		uuid_copy(&sbi->uuid, &j_sb->s_uuid);  in chkSuper()
381 		uuid_copy(&sbi->loguuid, &j_sb->s_loguuid);  in chkSuper()
383 	sbi->fsckpxd = j_sb->s_fsckpxd;  in chkSuper()
384 	sbi->ait2 = j_sb->s_ait2;  in chkSuper()
388 	return rc;  in chkSuper()
395  * update synchronously superblock if it is mounted read-write.
402 	int rc;  in updateSuper()  local
404 	if (sbi->flag & JFS_NOINTEGRITY) {  in updateSuper()
406 			sbi->p_state = state;  in updateSuper()
409 			sbi->p_state = sbi->state;  in updateSuper()
412 			state = sbi->p_state;  in updateSuper()
415 	} else if (sbi->state == FM_DIRTY)  in updateSuper()
418 	if ((rc = readSuper(sb, &bh)))  in updateSuper()
419 		return rc;  in updateSuper()
421 	j_sb = (struct jfs_superblock *)bh->b_data;  in updateSuper()
423 	j_sb->s_state = cpu_to_le32(state);  in updateSuper()
424 	sbi->state = state;  in updateSuper()
428 		j_sb->s_logdev = cpu_to_le32(new_encode_dev(sbi->log->bdev->bd_dev));  in updateSuper()
429 		j_sb->s_logserial = cpu_to_le32(sbi->log->serial);  in updateSuper()
435 		if (j_sb->s_flag & cpu_to_le32(JFS_DASD_ENABLED))  in updateSuper()
436 			j_sb->s_flag |= cpu_to_le32(JFS_DASD_PRIME);  in updateSuper()
455 	*bpp = sb_bread(sb, SUPER1_OFF >> sb->s_blocksize_bits);  in readSuper()
460 	*bpp = sb_bread(sb, SUPER2_OFF >> sb->s_blocksize_bits);  in readSuper()
464 	return -EIO;  in readSuper()
480  * to update block allocation map at aggregate level.
484 	struct jfs_log *log = JFS_SBI(sb)->log;  in logMOUNT()
491 	lrd.aggregate = cpu_to_le32(new_encode_dev(sb->s_bdev->bd_dev));  in logMOUNT()