2  *   Copyright (C) International Business Machines Corp., 2000-2004
16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31  * allocation map inode" (aka fileset inode):
34  * allocation map inode" (aka aggregate inode) where each inode
36  * on-disk inode in uniform way at both aggregate and fileset level;
46  *   mntvfs -> fileset ipimap+ -> aggregate ipbmap -> aggregate ipaimap;
47  *             fileset vfs     -> vp(1) <-> ... <-> vp(n) <->vproot;
69  * NAME:	jfs_mount(sb)
73  * PARAMETER:	sb	- super block
75  * RETURN:	-EBUSY	- device already mounted or open for write
76  *		-EBUSY	- cvrdvp already mounted;
77  *		-EBUSY	- mount table full
78  *		-ENOTDIR- cvrdvp not directory on a device mount
79  *		-ENXIO	- device open failure
83 	int rc = 0;		/* Return code */  in jfs_mount()  local
94 	if ((rc = chkSuper(sb))) {  in jfs_mount()
101 		rc = -EIO;  in jfs_mount()
104 	sbi->ipaimap = ipaimap;  in jfs_mount()
109 	 * initialize aggregate inode allocation map  in jfs_mount()
111 	if ((rc = diMount(ipaimap))) {  in jfs_mount()
112 		jfs_err("jfs_mount: diMount(ipaimap) failed w/rc = %d", rc);  in jfs_mount()
117 	 * open aggregate block allocation map  in jfs_mount()
121 		rc = -EIO;  in jfs_mount()
127 	sbi->ipbmap = ipbmap;  in jfs_mount()
130 	 * initialize aggregate block allocation map  in jfs_mount()
132 	if ((rc = dbMount(ipbmap))) {  in jfs_mount()
133 		jfs_err("jfs_mount: dbMount failed w/rc = %d", rc);  in jfs_mount()
138 	 * open the secondary aggregate inode allocation map  in jfs_mount()
140 	 * This is a duplicate of the aggregate inode allocation map.  in jfs_mount()
148 	if ((sbi->mntflag & JFS_BAD_SAIT) == 0) {  in jfs_mount()
152 			rc = -EIO;  in jfs_mount()
155 		sbi->ipaimap2 = ipaimap2;  in jfs_mount()
160 		 * initialize secondary aggregate inode allocation map  in jfs_mount()
162 		if ((rc = diMount(ipaimap2))) {  in jfs_mount()
163 			jfs_err("jfs_mount: diMount(ipaimap2) failed, rc = %d",  in jfs_mount()
164 				rc);  in jfs_mount()
169 		sbi->ipaimap2 = NULL;  in jfs_mount()
175 	 * open fileset inode allocation map (aka fileset inode)  in jfs_mount()
180 		/* open fileset secondary inode allocation map */  in jfs_mount()
181 		rc = -EIO;  in jfs_mount()
186 	/* map further access of per fileset inodes by the fileset inode */  in jfs_mount()
187 	sbi->ipimap = ipimap;  in jfs_mount()
189 	/* initialize fileset inode allocation map */  in jfs_mount()
190 	if ((rc = diMount(ipimap))) {  in jfs_mount()
191 		jfs_err("jfs_mount: diMount failed w/rc = %d", rc);  in jfs_mount()
200       errout41:		/* close fileset inode allocation map inode */  in jfs_mount()
205 	/* close secondary aggregate inode allocation map */  in jfs_mount()
213 	/* close aggregate block allocation map */  in jfs_mount()
217       errout22:		/* close aggregate inode allocation map */  in jfs_mount()
227 	if (rc)  in jfs_mount()
228 		jfs_err("Mount JFS Failure: %d", rc);  in jfs_mount()
230 	return rc;  in jfs_mount()
234  * NAME:	jfs_mount_rw(sb, remount)
236  * FUNCTION:	Completes read-write mount, or remounts read-only volume
237  *		as read-write
242 	int rc;  in jfs_mount_rw()  local
245 	 * If we are re-mounting a previously read-only volume, we want to  in jfs_mount_rw()
246 	 * re-read the inode and block maps, since fsck.jfs may have updated  in jfs_mount_rw()
250 		if (chkSuper(sb) || (sbi->state != FM_CLEAN))  in jfs_mount_rw()
251 			return -EINVAL;  in jfs_mount_rw()
253 		truncate_inode_pages(sbi->ipimap->i_mapping, 0);  in jfs_mount_rw()
254 		truncate_inode_pages(sbi->ipbmap->i_mapping, 0);  in jfs_mount_rw()
255 		diUnmount(sbi->ipimap, 1);  in jfs_mount_rw()
256 		if ((rc = diMount(sbi->ipimap))) {  in jfs_mount_rw()
258 			return rc;  in jfs_mount_rw()
261 		dbUnmount(sbi->ipbmap, 1);  in jfs_mount_rw()
262 		if ((rc = dbMount(sbi->ipbmap))) {  in jfs_mount_rw()
264 			return rc;  in jfs_mount_rw()
271 	if ((rc = lmLogOpen(sb)))  in jfs_mount_rw()
272 		return rc;  in jfs_mount_rw()
277 	if ((rc = updateSuper(sb, FM_MOUNT))) {  in jfs_mount_rw()
278 		jfs_err("jfs_mount: updateSuper failed w/rc = %d", rc);  in jfs_mount_rw()
280 		return rc;  in jfs_mount_rw()
288 	return rc;  in jfs_mount_rw()
303 	int rc = 0;  in chkSuper()  local
313 	if ((rc = readSuper(sb, &bh)))  in chkSuper()
314 		return rc;  in chkSuper()
315 	j_sb = (struct jfs_superblock *)bh->b_data;  in chkSuper()
321 	if (strncmp(j_sb->s_magic, JFS_MAGIC, 4) ||  in chkSuper()
322 	    le32_to_cpu(j_sb->s_version) > JFS_VERSION) {  in chkSuper()
323 		rc = -EINVAL;  in chkSuper()
327 	bsize = le32_to_cpu(j_sb->s_bsize);  in chkSuper()
331 		rc = -EINVAL;  in chkSuper()
337 		 le32_to_cpu(j_sb->s_flag), le32_to_cpu(j_sb->s_state),  in chkSuper()
338 		 (unsigned long long) le64_to_cpu(j_sb->s_size));  in chkSuper()
341 	if ((j_sb->s_flag & cpu_to_le32(JFS_BAD_SAIT)) !=  in chkSuper()
344 		AIM_bytesize = lengthPXD(&(j_sb->s_aim2)) * bsize;  in chkSuper()
346 		AIT_bytesize = lengthPXD(&(j_sb->s_ait2)) * bsize;  in chkSuper()
347 		AIM_byte_addr = addressPXD(&(j_sb->s_aim2)) * bsize;  in chkSuper()
348 		AIT_byte_addr = addressPXD(&(j_sb->s_ait2)) * bsize;  in chkSuper()
349 		byte_addr_diff0 = AIT_byte_addr - AIM_byte_addr;  in chkSuper()
350 		fsckwsp_addr = addressPXD(&(j_sb->s_fsckpxd)) * bsize;  in chkSuper()
351 		byte_addr_diff1 = fsckwsp_addr - AIT_byte_addr;  in chkSuper()
356 			j_sb->s_flag |= cpu_to_le32(JFS_BAD_SAIT);  in chkSuper()
359 	if ((j_sb->s_flag & cpu_to_le32(JFS_GROUPCOMMIT)) !=  in chkSuper()
361 		j_sb->s_flag |= cpu_to_le32(JFS_GROUPCOMMIT);  in chkSuper()
364 	if (j_sb->s_state != cpu_to_le32(FM_CLEAN) &&  in chkSuper()
367 		rc = -EINVAL;  in chkSuper()
371 	sbi->state = le32_to_cpu(j_sb->s_state);  in chkSuper()
372 	sbi->mntflag = le32_to_cpu(j_sb->s_flag);  in chkSuper()
378 	sbi->bsize = bsize;  in chkSuper()
379 	sbi->l2bsize = le16_to_cpu(j_sb->s_l2bsize);  in chkSuper()
385 	sbi->nbperpage = PSIZE >> sbi->l2bsize;  in chkSuper()
386 	sbi->l2nbperpage = L2PSIZE - sbi->l2bsize;  in chkSuper()
387 	sbi->l2niperblk = sbi->l2bsize - L2DISIZE;  in chkSuper()
388 	if (sbi->mntflag & JFS_INLINELOG)  in chkSuper()
389 		sbi->logpxd = j_sb->s_logpxd;  in chkSuper()
391 		sbi->logdev = new_decode_dev(le32_to_cpu(j_sb->s_logdev));  in chkSuper()
392 		memcpy(sbi->uuid, j_sb->s_uuid, sizeof(sbi->uuid));  in chkSuper()
393 		memcpy(sbi->loguuid, j_sb->s_loguuid, sizeof(sbi->uuid));  in chkSuper()
395 	sbi->fsckpxd = j_sb->s_fsckpxd;  in chkSuper()
396 	sbi->ait2 = j_sb->s_ait2;  in chkSuper()
400 	return rc;  in chkSuper()
407  * update synchronously superblock if it is mounted read-write.
414 	int rc;  in updateSuper()  local
416 	if (sbi->flag & JFS_NOINTEGRITY) {  in updateSuper()
418 			sbi->p_state = state;  in updateSuper()
421 			sbi->p_state = sbi->state;  in updateSuper()
424 			state = sbi->p_state;  in updateSuper()
427 	} else if (sbi->state == FM_DIRTY)  in updateSuper()
430 	if ((rc = readSuper(sb, &bh)))  in updateSuper()
431 		return rc;  in updateSuper()
433 	j_sb = (struct jfs_superblock *)bh->b_data;  in updateSuper()
435 	j_sb->s_state = cpu_to_le32(state);  in updateSuper()
436 	sbi->state = state;  in updateSuper()
440 		j_sb->s_logdev = cpu_to_le32(new_encode_dev(sbi->log->bdev->bd_dev));  in updateSuper()
441 		j_sb->s_logserial = cpu_to_le32(sbi->log->serial);  in updateSuper()
447 		if (j_sb->s_flag & cpu_to_le32(JFS_DASD_ENABLED))  in updateSuper()
448 			j_sb->s_flag |= cpu_to_le32(JFS_DASD_PRIME);  in updateSuper()
467 	*bpp = sb_bread(sb, SUPER1_OFF >> sb->s_blocksize_bits);  in readSuper()
472 	*bpp = sb_bread(sb, SUPER2_OFF >> sb->s_blocksize_bits);  in readSuper()
476 	return -EIO;  in readSuper()
492  * to update block allocation map at aggregate level.
496 	struct jfs_log *log = JFS_SBI(sb)->log;  in logMOUNT()
503 	lrd.aggregate = cpu_to_le32(new_encode_dev(sb->s_bdev->bd_dev));  in logMOUNT()