1 files changed, 71 insertions, 30 deletions

diff --git a/fs/partitions/ibm.c b/fs/partitions/ibm.c
index 1e064c4a4f86..46297683cd34 100644
--- a/fs/partitions/ibm.c
+++ b/fs/partitions/ibm.c
@@ -21,20 +21,38 @@
  * compute the block number from a
  * cyl-cyl-head-head structure
  */
-static inline int
+static sector_t
 cchh2blk (struct vtoc_cchh *ptr, struct hd_geometry *geo) {
-        return ptr->cc * geo->heads * geo->sectors +
-               ptr->hh * geo->sectors;
+
+        sector_t cyl;
+        __u16 head;
+
+        /*decode cylinder and heads for large volumes */
+        cyl = ptr->hh & 0xFFF0;
+        cyl <<= 12;
+        cyl |= ptr->cc;
+        head = ptr->hh & 0x000F;
+        return cyl * geo->heads * geo->sectors +
+               head * geo->sectors;
 }
 
 /*
  * compute the block number from a
  * cyl-cyl-head-head-block structure
  */
-static inline int
+static sector_t
 cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) {
-        return ptr->cc * geo->heads * geo->sectors +
-                ptr->hh * geo->sectors +
+
+        sector_t cyl;
+        __u16 head;
+
+        /*decode cylinder and heads for large volumes */
+        cyl = ptr->hh & 0xFFF0;
+        cyl <<= 12;
+        cyl |= ptr->cc;
+        head = ptr->hh & 0x000F;
+        return  cyl * geo->heads * geo->sectors +
+                head * geo->sectors +
                 ptr->b;
 }
 
@@ -43,14 +61,15 @@ cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) {
 int
 ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
 {
-        int blocksize, offset, size,res;
-        loff_t i_size;
+        int blocksize, res;
+        loff_t i_size, offset, size, fmt_size;
         dasd_information2_t *info;
         struct hd_geometry *geo;
         char type[5] = {0,};
         char name[7] = {0,};
         union label_t {
-                struct vtoc_volume_label vol;
+                struct vtoc_volume_label_cdl vol;
+                struct vtoc_volume_label_ldl lnx;
                 struct vtoc_cms_label cms;
         } *label;
         unsigned char *data;
@@ -85,14 +104,16 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
         if (data == NULL)
                 goto out_readerr;
 
-        strncpy (type, data, 4);
-        if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD")))
-                strncpy(name, data + 8, 6);
-        else
-                strncpy(name, data + 4, 6);
         memcpy(label, data, sizeof(union label_t));
         put_dev_sector(sect);
 
+        if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) {
+                strncpy(type, label->vol.vollbl, 4);
+                strncpy(name, label->vol.volid, 6);
+        } else {
+                strncpy(type, label->lnx.vollbl, 4);
+                strncpy(name, label->lnx.volid, 6);
+        }
         EBCASC(type, 4);
         EBCASC(name, 6);
 
@@ -110,36 +131,54 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
                         /*
                          * VM style CMS1 labeled disk
                          */
+                        blocksize = label->cms.block_size;
                         if (label->cms.disk_offset != 0) {
                                 printk("CMS1/%8s(MDSK):", name);
                                 /* disk is reserved minidisk */
-                                blocksize = label->cms.block_size;
                                 offset = label->cms.disk_offset;
                                 size = (label->cms.block_count - 1)
                                         * (blocksize >> 9);
                         } else {
                                 printk("CMS1/%8s:", name);
                                 offset = (info->label_block + 1);
-                                size = i_size >> 9;
+                                size = label->cms.block_count
+                                        * (blocksize >> 9);
                         }
+                        put_partition(state, 1, offset*(blocksize >> 9),
+                                      size-offset*(blocksize >> 9));
                 } else {
-                        /*
-                         * Old style LNX1 or unlabeled disk
-                         */
-                        if (strncmp(type, "LNX1", 4) == 0)
-                                printk ("LNX1/%8s:", name);
-                        else
+                        if (strncmp(type, "LNX1", 4) == 0) {
+                                printk("LNX1/%8s:", name);
+                                if (label->lnx.ldl_version == 0xf2) {
+                                        fmt_size = label->lnx.formatted_blocks
+                                                * (blocksize >> 9);
+                                } else if (!strcmp(info->type, "ECKD")) {
+                                        /* formated w/o large volume support */
+                                        fmt_size = geo->cylinders * geo->heads
+                                              * geo->sectors * (blocksize >> 9);
+                                } else {
+                                        /* old label and no usable disk geometry
+                                         * (e.g. DIAG) */
+                                        fmt_size = i_size >> 9;
+                                }
+                                size = i_size >> 9;
+                                if (fmt_size < size)
+                                        size = fmt_size;
+                                offset = (info->label_block + 1);
+                        } else {
+                                /* unlabeled disk */
                                 printk("(nonl)");
-                        offset = (info->label_block + 1);
-                        size = i_size >> 9;
-                }
-                put_partition(state, 1, offset*(blocksize >> 9),
+                                size = i_size >> 9;
+                                offset = (info->label_block + 1);
+                        }
+                        put_partition(state, 1, offset*(blocksize >> 9),
                                       size-offset*(blocksize >> 9));
+                }
         } else if (info->format == DASD_FORMAT_CDL) {
                 /*
                  * New style CDL formatted disk
                  */
-                unsigned int blk;
+                sector_t blk;
                 int counter;
 
                 /*
@@ -166,7 +205,8 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
                                 /* skip FMT4 / FMT5 / FMT7 labels */
                                 if (f1.DS1FMTID == _ascebc['4']
                                     || f1.DS1FMTID == _ascebc['5']
-                                    || f1.DS1FMTID == _ascebc['7']) {
+                                    || f1.DS1FMTID == _ascebc['7']
+                                    || f1.DS1FMTID == _ascebc['9']) {
                                         blk++;
                                         data = read_dev_sector(bdev, blk *
                                                                (blocksize/512),
@@ -174,8 +214,9 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
                                         continue;
                                 }
 
-                                /* only FMT1 valid at this point */
-                                if (f1.DS1FMTID != _ascebc['1'])
+                                /* only FMT1 and 8 labels valid at this point */
+                                if (f1.DS1FMTID != _ascebc['1'] &&
+                                    f1.DS1FMTID != _ascebc['8'])
                                         break;
 
                                 /* OK, we got valid partition data */