fs/hfs/part_tbl.c

4  * Copyright (C) 1996-1997  Paul H. Hargrove
8  * Original code to handle the new style Mac partition table based on
15  * The new style Mac partition map
17  * For each partition on the media there is a physical block (512-byte
24 	__be32	pmMapBlkCnt;	/* partition blocks count */
25 	__be32	pmPyPartStart;	/* physical block start of partition */
26 	__be32	pmPartBlkCnt;	/* physical block count of partition */
29 				   partition */
32 				   partition */
37  * The old style Mac partition map
39  * The partition map consists for a 2-byte signature followed by an
40  * array of these structures.  The map is terminated with an all-zero
55  * Parse the partition map looking for the
56  * start and length of the 'part'th HFS partition.
65 	res = -ENOENT;  in hfs_part_find()
68 		return -EIO;  in hfs_part_find()
76 		pm = (struct old_pmap *)bh->b_data;  in hfs_part_find()
77 		p = pm->pdEntry;  in hfs_part_find()
80 			if (p->pdStart && p->pdSize &&  in hfs_part_find()
81 			    p->pdFSID == cpu_to_be32(0x54465331)/*"TFS1"*/ &&  in hfs_part_find()
82 			    (HFS_SB(sb)->part < 0 || HFS_SB(sb)->part == i)) {  in hfs_part_find()
83 				*part_start += be32_to_cpu(p->pdStart);  in hfs_part_find()
84 				*part_size = be32_to_cpu(p->pdSize);  in hfs_part_find()
94 		pm = (struct new_pmap *)bh->b_data;  in hfs_part_find()
95 		size = be32_to_cpu(pm->pmMapBlkCnt);  in hfs_part_find()
97 			if (!memcmp(pm->pmPartType,"Apple_HFS", 9) &&  in hfs_part_find()
98 			    (HFS_SB(sb)->part < 0 || HFS_SB(sb)->part == i)) {  in hfs_part_find()
99 				*part_start += be32_to_cpu(pm->pmPyPartStart);  in hfs_part_find()
100 				*part_size = be32_to_cpu(pm->pmPartBlkCnt);  in hfs_part_find()
107 				return -EIO;  in hfs_part_find()
108 			if (pm->pmSig != cpu_to_be16(HFS_NEW_PMAP_MAGIC))  in hfs_part_find()