Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=dde33348e53ecab687a9768bf5262f0b8f79b7f2
Commit:     dde33348e53ecab687a9768bf5262f0b8f79b7f2
Parent:     17304383ebc1ce68a88030ac4d18ea549d9578c7
Author:     Anton Altaparmakov <[EMAIL PROTECTED]>
AuthorDate: Mon May 21 09:37:42 2007 +0100
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Mon May 21 09:58:40 2007 -0700

    LDM: Fix for Windows Vista dynamic disks
    
    This fixes the LDM driver so that it works with Windows Vista dynamic
    disks which are subtly different to Windows 2000/XP ones.
    
    The patch was needed to get a Vista formatted dynamic disk to be
    recognized and parsed successfully.
    
    Thanks go to Chris Teachworth for the report and testing.
    
    Cc: Richard Russon <[EMAIL PROTECTED]>
    Signed-off-by: Anton Altaparmakov <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 Documentation/ldm.txt |   21 ++++--
 MAINTAINERS           |    6 +-
 fs/partitions/Kconfig |   12 ++-
 fs/partitions/ldm.c   |  206 +++++++++++++++++++++++++++---------------------
 fs/partitions/ldm.h   |    6 +-
 5 files changed, 144 insertions(+), 107 deletions(-)

diff --git a/Documentation/ldm.txt b/Documentation/ldm.txt
index e266e11..718085b 100644
--- a/Documentation/ldm.txt
+++ b/Documentation/ldm.txt
@@ -2,10 +2,13 @@
             LDM - Logical Disk Manager (Dynamic Disks)
             ------------------------------------------
 
+Originally Written by FlatCap - Richard Russon <[EMAIL PROTECTED]>.
+Last Updated by Anton Altaparmakov on 30 March 2007 for Windows Vista.
+
 Overview
 --------
 
-Windows 2000 and XP use a new partitioning scheme.  It is a complete
+Windows 2000, XP, and Vista use a new partitioning scheme.  It is a complete
 replacement for the MSDOS style partitions.  It stores its information in a
 1MiB journalled database at the end of the physical disk.  The size of
 partitions is limited only by disk space.  The maximum number of partitions is
@@ -23,7 +26,11 @@ Once the LDM driver has divided up the disk, you can use the 
MD driver to
 assemble any multi-partition volumes, e.g.  Stripes, RAID5.
 
 To prevent legacy applications from repartitioning the disk, the LDM creates a
-dummy MSDOS partition containing one disk-sized partition.
+dummy MSDOS partition containing one disk-sized partition.  This is what is
+supported with the Linux LDM driver.
+
+A newer approach that has been implemented with Vista is to put LDM on top of a
+GPT label disk.  This is not supported by the Linux LDM driver yet.
 
 
 Example
@@ -88,13 +95,13 @@ and cannot boot from a Dynamic Disk.
 More Documentation
 ------------------
 
-There is an Overview of the LDM online together with complete Technical
-Documentation.  It can also be downloaded in html.
+There is an Overview of the LDM together with complete Technical Documentation.
+It is available for download.
 
-  http://linux-ntfs.sourceforge.net/ldm/index.html
-  http://linux-ntfs.sourceforge.net/downloads.html
+  http://www.linux-ntfs.org/content/view/19/37/
 
-If you have any LDM questions that aren't answered on the website, email me.
+If you have any LDM questions that aren't answered in the documentation, email
+me.
 
 Cheers,
     FlatCap - Richard Russon
diff --git a/MAINTAINERS b/MAINTAINERS
index 4c3277c..22ab401 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2231,11 +2231,11 @@ M:      [EMAIL PROTECTED]
 L:     [EMAIL PROTECTED]
 S:     Maintained
 
-LOGICAL DISK MANAGER SUPPORT (LDM, Windows 2000/XP Dynamic Disks)
+LOGICAL DISK MANAGER SUPPORT (LDM, Windows 2000/XP/Vista Dynamic Disks)
 P:     Richard Russon (FlatCap)
 M:     [EMAIL PROTECTED]
-L:     [EMAIL PROTECTED]
-W:     http://ldm.sourceforge.net
+L:     [EMAIL PROTECTED]
+W:     http://www.linux-ntfs.org/content/view/19/37/
 S:     Maintained
 
 LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI)
diff --git a/fs/partitions/Kconfig b/fs/partitions/Kconfig
index 7638a1c..a99acd8 100644
--- a/fs/partitions/Kconfig
+++ b/fs/partitions/Kconfig
@@ -166,8 +166,12 @@ config LDM_PARTITION
        depends on PARTITION_ADVANCED
        ---help---
          Say Y here if you would like to use hard disks under Linux which
-         were partitioned using Windows 2000's or XP's Logical Disk Manager.
-         They are also known as "Dynamic Disks".
+         were partitioned using Windows 2000's/XP's or Vista's Logical Disk
+         Manager.  They are also known as "Dynamic Disks".
+
+         Note this driver only supports Dynamic Disks with a protective MBR
+         label, i.e. DOS partition table.  It does not support GPT labelled
+         Dynamic Disks yet as can be created with Vista.
 
          Windows 2000 introduced the concept of Dynamic Disks to get around
          the limitations of the PC's partitioning scheme.  The Logical Disk
@@ -175,8 +179,8 @@ config LDM_PARTITION
          mirrored, striped or RAID volumes, all without the need for
          rebooting.
 
-         Normal partitions are now called Basic Disks under Windows 2000 and
-         XP.
+         Normal partitions are now called Basic Disks under Windows 2000, XP,
+         and Vista.
 
          For a fuller description read <file:Documentation/ldm.txt>.
 
diff --git a/fs/partitions/ldm.c b/fs/partitions/ldm.c
index 1a60926..c387812 100644
--- a/fs/partitions/ldm.c
+++ b/fs/partitions/ldm.c
@@ -2,10 +2,10 @@
  * ldm - Support for Windows Logical Disk Manager (Dynamic Disks)
  *
  * Copyright (C) 2001,2002 Richard Russon <[EMAIL PROTECTED]>
- * Copyright (c) 2001-2004 Anton Altaparmakov
+ * Copyright (c) 2001-2007 Anton Altaparmakov
  * Copyright (C) 2001,2002 Jakob Kemi <[EMAIL PROTECTED]>
  *
- * Documentation is available at http://linux-ntfs.sf.net/ldm
+ * Documentation is available at http://www.linux-ntfs.org/content/view/19/37/
  *
  * This program is free software; you can redistribute it and/or modify it 
under
  * the terms of the GNU General Public License as published by the Free 
Software
@@ -62,7 +62,6 @@ static void _ldm_printk (const char *level, const char 
*function,
        printk ("%s%s(): %s\n", level, function, buf);
 }
 
-
 /**
  * ldm_parse_hexbyte - Convert a ASCII hex number to a byte
  * @src:  Pointer to at least 2 characters to convert.
@@ -118,7 +117,6 @@ static bool ldm_parse_guid (const u8 *src, u8 *dest)
        return true;
 }
 
-
 /**
  * ldm_parse_privhead - Read the LDM Database PRIVHEAD structure
  * @data:  Raw database PRIVHEAD structure loaded from the device
@@ -130,46 +128,48 @@ static bool ldm_parse_guid (const u8 *src, u8 *dest)
  * Return:  'true'   @ph contains the PRIVHEAD data
  *          'false'  @ph contents are undefined
  */
-static bool ldm_parse_privhead (const u8 *data, struct privhead *ph)
+static bool ldm_parse_privhead(const u8 *data, struct privhead *ph)
 {
-       BUG_ON (!data || !ph);
+       bool is_vista = false;
 
-       if (MAGIC_PRIVHEAD != BE64 (data)) {
-               ldm_error ("Cannot find PRIVHEAD structure. LDM database is"
+       BUG_ON(!data || !ph);
+       if (MAGIC_PRIVHEAD != BE64(data)) {
+               ldm_error("Cannot find PRIVHEAD structure. LDM database is"
                        " corrupt. Aborting.");
                return false;
        }
-
-       ph->ver_major          = BE16 (data + 0x000C);
-       ph->ver_minor          = BE16 (data + 0x000E);
-       ph->logical_disk_start = BE64 (data + 0x011B);
-       ph->logical_disk_size  = BE64 (data + 0x0123);
-       ph->config_start       = BE64 (data + 0x012B);
-       ph->config_size        = BE64 (data + 0x0133);
-
-       if ((ph->ver_major != 2) || (ph->ver_minor != 11)) {
-               ldm_error ("Expected PRIVHEAD version %d.%d, got %d.%d."
-                       " Aborting.", 2, 11, ph->ver_major, ph->ver_minor);
+       ph->ver_major = BE16(data + 0x000C);
+       ph->ver_minor = BE16(data + 0x000E);
+       ph->logical_disk_start = BE64(data + 0x011B);
+       ph->logical_disk_size = BE64(data + 0x0123);
+       ph->config_start = BE64(data + 0x012B);
+       ph->config_size = BE64(data + 0x0133);
+       /* Version 2.11 is Win2k/XP and version 2.12 is Vista. */
+       if (ph->ver_major == 2 && ph->ver_minor == 12)
+               is_vista = true;
+       if (!is_vista && (ph->ver_major != 2 || ph->ver_minor != 11)) {
+               ldm_error("Expected PRIVHEAD version 2.11 or 2.12, got %d.%d."
+                       " Aborting.", ph->ver_major, ph->ver_minor);
                return false;
        }
+       ldm_debug("PRIVHEAD version %d.%d (Windows %s).", ph->ver_major,
+                       ph->ver_minor, is_vista ? "Vista" : "2000/XP");
        if (ph->config_size != LDM_DB_SIZE) {   /* 1 MiB in sectors. */
-               /* Warn the user and continue, carefully */
-               ldm_info ("Database is normally %u bytes, it claims to "
+               /* Warn the user and continue, carefully. */
+               ldm_info("Database is normally %u bytes, it claims to "
                        "be %llu bytes.", LDM_DB_SIZE,
-                       (unsigned long long)ph->config_size );
+                       udunsigned long long)ph->config_size);
        }
-       if ((ph->logical_disk_size == 0) ||
-           (ph->logical_disk_start + ph->logical_disk_size > 
ph->config_start)) {
-               ldm_error ("PRIVHEAD disk size doesn't match real disk size");
+       if ((ph->logical_disk_size == 0) || (ph->logical_disk_start +
+                       ph->logical_disk_size > ph->config_start)) {
+               ldm_error("PRIVHEAD disk size doesn't match real disk size");
                return false;
        }
-
-       if (!ldm_parse_guid (data + 0x0030, ph->disk_id)) {
-               ldm_error ("PRIVHEAD contains an invalid GUID.");
+       if (!ldm_parse_guid(data + 0x0030, ph->disk_id)) {
+               ldm_error("PRIVHEAD contains an invalid GUID.");
                return false;
        }
-
-       ldm_debug ("Parsed PRIVHEAD successfully.");
+       ldm_debug("Parsed PRIVHEAD successfully.");
        return true;
 }
 
@@ -409,7 +409,7 @@ out:
  * Return:  'true'   @toc1 contains validated TOCBLOCK info
  *          'false'  @toc1 contents are undefined
  */
-static bool ldm_validate_tocblocks (struct block_device *bdev,
+static bool ldm_validate_tocblocks(struct block_device *bdev,
        unsigned long base, struct ldmdb *ldb)
 {
        static const int off[4] = { OFF_TOCB1, OFF_TOCB2, OFF_TOCB3, OFF_TOCB4};
@@ -417,54 +417,57 @@ static bool ldm_validate_tocblocks (struct block_device 
*bdev,
        struct privhead *ph;
        Sector sect;
        u8 *data;
+       int i, nr_tbs;
        bool result = false;
-       int i;
 
-       BUG_ON (!bdev || !ldb);
-
-       ph    = &ldb->ph;
+       BUG_ON(!bdev || !ldb);
+       ph = &ldb->ph;
        tb[0] = &ldb->toc;
-       tb[1] = kmalloc (sizeof (*tb[1]), GFP_KERNEL);
-       tb[2] = kmalloc (sizeof (*tb[2]), GFP_KERNEL);
-       tb[3] = kmalloc (sizeof (*tb[3]), GFP_KERNEL);
-       if (!tb[1] || !tb[2] || !tb[3]) {
-               ldm_crit ("Out of memory.");
-               goto out;
+       tb[1] = kmalloc(sizeof(*tb[1]) * 3, GFP_KERNEL);
+       if (!tb[1]) {
+               ldm_crit("Out of memory.");
+               goto err;
        }
-
-       for (i = 0; i < 4; i++)         /* Read and parse all four toc's. */
-       {
-               data = read_dev_sector (bdev, base + off[i], &sect);
+       tb[2] = (struct tocblock*)((u8*)tb[1] + sizeof(*tb[1]));
+       tb[3] = (struct tocblock*)((u8*)tb[2] + sizeof(*tb[2]));
+       /*
+        * Try to read and parse all four TOCBLOCKs.
+        *
+        * Windows Vista LDM v2.12 does not always have all four TOCBLOCKs so
+        * skip any that fail as long as we get at least one valid TOCBLOCK.
+        */
+       for (nr_tbs = i = 0; i < 4; i++) {
+               data = read_dev_sector(bdev, base + off[i], &sect);
                if (!data) {
-                       ldm_crit ("Disk read failed.");
-                       goto out;
+                       ldm_error("Disk read failed for TOCBLOCK %d.", i);
+                       continue;
                }
-               result = ldm_parse_tocblock (data, tb[i]);
-               put_dev_sector (sect);
-               if (!result)
-                       goto out;       /* Already logged */
+               if (ldm_parse_tocblock(data, tb[nr_tbs]))
+                       nr_tbs++;
+               put_dev_sector(sect);
        }
-
-       /* Range check the toc against a privhead. */
+       if (!nr_tbs) {
+               ldm_crit("Failed to find a valid TOCBLOCK.");
+               goto err;
+       }
+       /* Range check the TOCBLOCK against a privhead. */
        if (((tb[0]->bitmap1_start + tb[0]->bitmap1_size) > ph->config_size) ||
-           ((tb[0]->bitmap2_start + tb[0]->bitmap2_size) > ph->config_size)) {
-               ldm_crit ("The bitmaps are out of range.  Giving up.");
-               goto out;
+                       ((tb[0]->bitmap2_start + tb[0]->bitmap2_size) >
+                       ph->config_size)) {
+               ldm_crit("The bitmaps are out of range.  Giving up.");
+               goto err;
        }
-
-       if (!ldm_compare_tocblocks (tb[0], tb[1]) ||    /* Compare all tocs. */
-           !ldm_compare_tocblocks (tb[0], tb[2]) ||
-           !ldm_compare_tocblocks (tb[0], tb[3])) {
-               ldm_crit ("The TOCBLOCKs don't match.");
-               goto out;
+       /* Compare all loaded TOCBLOCKs. */
+       for (i = 1; i < nr_tbs; i++) {
+               if (!ldm_compare_tocblocks(tb[0], tb[i])) {
+                       ldm_crit("TOCBLOCKs 0 and %d do not match.", i);
+                       goto err;
+               }
        }
-
-       ldm_debug ("Validated TOCBLOCKs successfully.");
+       ldm_debug("Validated %d TOCBLOCKs successfully.", nr_tbs);
        result = true;
-out:
-       kfree (tb[1]);
-       kfree (tb[2]);
-       kfree (tb[3]);
+err:
+       kfree(tb[1]);
        return result;
 }
 
@@ -566,7 +569,7 @@ static bool ldm_validate_partition_table (struct 
block_device *bdev)
 
        p = (struct partition*)(data + 0x01BE);
        for (i = 0; i < 4; i++, p++)
-               if (SYS_IND (p) == WIN2K_DYNAMIC_PARTITION) {
+               if (SYS_IND (p) == LDM_PARTITION) {
                        result = true;
                        break;
                }
@@ -975,44 +978,68 @@ static bool ldm_parse_dsk4 (const u8 *buffer, int buflen, 
struct vblk *vb)
  * Return:  'true'   @vb contains a Partition VBLK
  *          'false'  @vb contents are not defined
  */
-static bool ldm_parse_prt3 (const u8 *buffer, int buflen, struct vblk *vb)
+static bool ldm_parse_prt3(const u8 *buffer, int buflen, struct vblk *vb)
 {
        int r_objid, r_name, r_size, r_parent, r_diskid, r_index, len;
        struct vblk_part *part;
 
-       BUG_ON (!buffer || !vb);
-
-       r_objid  = ldm_relative (buffer, buflen, 0x18, 0);
-       r_name   = ldm_relative (buffer, buflen, 0x18, r_objid);
-       r_size   = ldm_relative (buffer, buflen, 0x34, r_name);
-       r_parent = ldm_relative (buffer, buflen, 0x34, r_size);
-       r_diskid = ldm_relative (buffer, buflen, 0x34, r_parent);
-
+       BUG_ON(!buffer || !vb);
+       r_objid = ldm_relative(buffer, buflen, 0x18, 0);
+       if (r_objid < 0) {
+               ldm_error("r_objid %d < 0", r_objid);
+               return false;
+       }
+       r_name = ldm_relative(buffer, buflen, 0x18, r_objid);
+       if (r_name < 0) {
+               ldm_error("r_name %d < 0", r_name);
+               return false;
+       }
+       r_size = ldm_relative(buffer, buflen, 0x34, r_name);
+       if (r_size < 0) {
+               ldm_error("r_size %d < 0", r_size);
+               return false;
+       }
+       r_parent = ldm_relative(buffer, buflen, 0x34, r_size);
+       if (r_parent < 0) {
+               ldm_error("r_parent %d < 0", r_parent);
+               return false;
+       }
+       r_diskid = ldm_relative(buffer, buflen, 0x34, r_parent);
+       if (r_diskid < 0) {
+               ldm_error("r_diskid %d < 0", r_diskid);
+               return false;
+       }
        if (buffer[0x12] & VBLK_FLAG_PART_INDEX) {
-               r_index = ldm_relative (buffer, buflen, 0x34, r_diskid);
+               r_index = ldm_relative(buffer, buflen, 0x34, r_diskid);
+               if (r_index < 0) {
+                       ldm_error("r_index %d < 0", r_index);
+                       return false;
+               }
                len = r_index;
        } else {
                r_index = 0;
                len = r_diskid;
        }
-       if (len < 0)
+       if (len < 0) {
+               ldm_error("len %d < 0", len);
                return false;
-
+       }
        len += VBLK_SIZE_PRT3;
-       if (len != BE32 (buffer + 0x14))
+       if (len > BE32(buffer + 0x14)) {
+               ldm_error("len %d > BE32(buffer + 0x14) %d", len,
+                               BE32(buffer + 0x14));
                return false;
-
+       }
        part = &vb->vblk.part;
-       part->start         = BE64         (buffer + 0x24 + r_name);
-       part->volume_offset = BE64         (buffer + 0x2C + r_name);
-       part->size          = ldm_get_vnum (buffer + 0x34 + r_name);
-       part->parent_id     = ldm_get_vnum (buffer + 0x34 + r_size);
-       part->disk_id       = ldm_get_vnum (buffer + 0x34 + r_parent);
+       part->start = BE64(buffer + 0x24 + r_name);
+       part->volume_offset = BE64(buffer + 0x2C + r_name);
+       part->size = ldm_get_vnum(buffer + 0x34 + r_name);
+       part->parent_id = ldm_get_vnum(buffer + 0x34 + r_size);
+       part->disk_id = ldm_get_vnum(buffer + 0x34 + r_parent);
        if (vb->flags & VBLK_FLAG_PART_INDEX)
                part->partnum = buffer[0x35 + r_diskid];
        else
                part->partnum = 0;
-
        return true;
 }
 
@@ -1475,4 +1502,3 @@ out:
        kfree (ldb);
        return result;
 }
-
diff --git a/fs/partitions/ldm.h b/fs/partitions/ldm.h
index 6e8d795..d2e6a30 100644
--- a/fs/partitions/ldm.h
+++ b/fs/partitions/ldm.h
@@ -2,10 +2,10 @@
  * ldm - Part of the Linux-NTFS project.
  *
  * Copyright (C) 2001,2002 Richard Russon <[EMAIL PROTECTED]>
- * Copyright (C) 2001      Anton Altaparmakov <[EMAIL PROTECTED]>
+ * Copyright (c) 2001-2007 Anton Altaparmakov
  * Copyright (C) 2001,2002 Jakob Kemi <[EMAIL PROTECTED]>
  *
- * Documentation is available at http://linux-ntfs.sf.net/ldm
+ * Documentation is available at http://www.linux-ntfs.org/content/view/19/37/
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
@@ -93,7 +93,7 @@ struct parsed_partitions;
 
 #define OFF_VMDB               17              /* List of partitions. */
 
-#define WIN2K_DYNAMIC_PARTITION        0x42            /* Formerly SFS 
(Landis). */
+#define LDM_PARTITION          0x42            /* Formerly SFS (Landis). */
 
 #define TOC_BITMAP1            "config"        /* Names of the two defined */
 #define TOC_BITMAP2            "log"           /* bitmaps in the TOCBLOCK. */
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to