#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/stringify.h>
+#include <linux/kernel.h>
#include "ldm.h"
#include "check.h"
#include "msdos.h"
int h;
/* high part */
- if ((x = src[0] - '0') <= '9'-'0') h = x;
- else if ((x = src[0] - 'a') <= 'f'-'a') h = x+10;
- else if ((x = src[0] - 'A') <= 'F'-'A') h = x+10;
- else return -1;
- h <<= 4;
+ x = h = hex_to_bin(src[0]);
+ if (h < 0)
+ return -1;
/* low part */
- if ((x = src[1] - '0') <= '9'-'0') return h | x;
- if ((x = src[1] - 'a') <= 'f'-'a') return h | (x+10);
- if ((x = src[1] - 'A') <= 'F'-'A') return h | (x+10);
- return -1;
+ h = hex_to_bin(src[1]);
+ if (h < 0)
+ return -1;
+
+ return (x << 4) + h;
}
/**
/**
* ldm_validate_privheads - Compare the primary privhead with its backups
- * @bdev: Device holding the LDM Database
+ * @state: Partition check state including device holding the LDM Database
* @ph1: Memory struct to fill with ph contents
*
* Read and compare all three privheads from disk.
* Return: 'true' Success
* 'false' Error
*/
-static bool ldm_validate_privheads (struct block_device *bdev,
- struct privhead *ph1)
+static bool ldm_validate_privheads(struct parsed_partitions *state,
+ struct privhead *ph1)
{
static const int off[3] = { OFF_PRIV1, OFF_PRIV2, OFF_PRIV3 };
struct privhead *ph[3] = { ph1 };
long num_sects;
int i;
- BUG_ON (!bdev || !ph1);
+ BUG_ON (!state || !ph1);
ph[1] = kmalloc (sizeof (*ph[1]), GFP_KERNEL);
ph[2] = kmalloc (sizeof (*ph[2]), GFP_KERNEL);
/* Read and parse privheads */
for (i = 0; i < 3; i++) {
- data = read_dev_sector (bdev,
- ph[0]->config_start + off[i], §);
+ data = read_part_sector(state, ph[0]->config_start + off[i],
+ §);
if (!data) {
ldm_crit ("Disk read failed.");
goto out;
}
}
- num_sects = bdev->bd_inode->i_size >> 9;
+ num_sects = state->bdev->bd_inode->i_size >> 9;
if ((ph[0]->config_start > num_sects) ||
((ph[0]->config_start + ph[0]->config_size) > num_sects)) {
/**
* ldm_validate_tocblocks - Validate the table of contents and its backups
- * @bdev: Device holding the LDM Database
- * @base: Offset, into @bdev, of the database
+ * @state: Partition check state including device holding the LDM Database
+ * @base: Offset, into @state->bdev, of the database
* @ldb: Cache of the database structures
*
* Find and compare the four tables of contents of the LDM Database stored on
- * @bdev and return the parsed information into @toc1.
+ * @state->bdev and return the parsed information into @toc1.
*
* The offsets and sizes of the configs are range-checked against a privhead.
*
* Return: 'true' @toc1 contains validated TOCBLOCK info
* 'false' @toc1 contents are undefined
*/
-static bool ldm_validate_tocblocks(struct block_device *bdev,
- unsigned long base, struct ldmdb *ldb)
+static bool ldm_validate_tocblocks(struct parsed_partitions *state,
+ unsigned long base, struct ldmdb *ldb)
{
static const int off[4] = { OFF_TOCB1, OFF_TOCB2, OFF_TOCB3, OFF_TOCB4};
struct tocblock *tb[4];
int i, nr_tbs;
bool result = false;
- BUG_ON(!bdev || !ldb);
+ BUG_ON(!state || !ldb);
ph = &ldb->ph;
tb[0] = &ldb->toc;
tb[1] = kmalloc(sizeof(*tb[1]) * 3, GFP_KERNEL);
* 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], §);
+ data = read_part_sector(state, base + off[i], §);
if (!data) {
ldm_error("Disk read failed for TOCBLOCK %d.", i);
continue;
/**
* ldm_validate_vmdb - Read the VMDB and validate it
- * @bdev: Device holding the LDM Database
+ * @state: Partition check state including device holding the LDM Database
* @base: Offset, into @bdev, of the database
* @ldb: Cache of the database structures
*
* Return: 'true' @ldb contains validated VBDB info
* 'false' @ldb contents are undefined
*/
-static bool ldm_validate_vmdb (struct block_device *bdev, unsigned long base,
- struct ldmdb *ldb)
+static bool ldm_validate_vmdb(struct parsed_partitions *state,
+ unsigned long base, struct ldmdb *ldb)
{
Sector sect;
u8 *data;
struct vmdb *vm;
struct tocblock *toc;
- BUG_ON (!bdev || !ldb);
+ BUG_ON (!state || !ldb);
vm = &ldb->vm;
toc = &ldb->toc;
- data = read_dev_sector (bdev, base + OFF_VMDB, §);
+ data = read_part_sector(state, base + OFF_VMDB, §);
if (!data) {
ldm_crit ("Disk read failed.");
return false;
/**
* ldm_validate_partition_table - Determine whether bdev might be a dynamic disk
- * @bdev: Device holding the LDM Database
+ * @state: Partition check state including device holding the LDM Database
*
* This function provides a weak test to decide whether the device is a dynamic
* disk or not. It looks for an MS-DOS-style partition table containing at
* least one partition of type 0x42 (formerly SFS, now used by Windows for
* dynamic disks).
*
- * N.B. The only possible error can come from the read_dev_sector and that is
+ * N.B. The only possible error can come from the read_part_sector and that is
* only likely to happen if the underlying device is strange. If that IS
* the case we should return zero to let someone else try.
*
- * Return: 'true' @bdev is a dynamic disk
- * 'false' @bdev is not a dynamic disk, or an error occurred
+ * Return: 'true' @state->bdev is a dynamic disk
+ * 'false' @state->bdev is not a dynamic disk, or an error occurred
*/
-static bool ldm_validate_partition_table (struct block_device *bdev)
+static bool ldm_validate_partition_table(struct parsed_partitions *state)
{
Sector sect;
u8 *data;
int i;
bool result = false;
- BUG_ON (!bdev);
+ BUG_ON(!state);
- data = read_dev_sector (bdev, 0, §);
+ data = read_part_sector(state, 0, §);
if (!data) {
ldm_crit ("Disk read failed.");
return false;
/**
* ldm_get_vblks - Read the on-disk database of VBLKs into memory
- * @bdev: Device holding the LDM Database
- * @base: Offset, into @bdev, of the database
+ * @state: Partition check state including device holding the LDM Database
+ * @base: Offset, into @state->bdev, of the database
* @ldb: Cache of the database structures
*
* To use the information from the VBLKs, they need to be read from the disk,
* Return: 'true' All the VBLKs were read successfully
* 'false' An error occurred
*/
-static bool ldm_get_vblks (struct block_device *bdev, unsigned long base,
- struct ldmdb *ldb)
+static bool ldm_get_vblks(struct parsed_partitions *state, unsigned long base,
+ struct ldmdb *ldb)
{
int size, perbuf, skip, finish, s, v, recs;
u8 *data = NULL;
bool result = false;
LIST_HEAD (frags);
- BUG_ON (!bdev || !ldb);
+ BUG_ON(!state || !ldb);
size = ldb->vm.vblk_size;
perbuf = 512 / size;
finish = (size * ldb->vm.last_vblk_seq) >> 9;
for (s = skip; s < finish; s++) { /* For each sector */
- data = read_dev_sector (bdev, base + OFF_VMDB + s, §);
+ data = read_part_sector(state, base + OFF_VMDB + s, §);
if (!data) {
ldm_crit ("Disk read failed.");
goto out;
/**
* ldm_partition - Find out whether a device is a dynamic disk and handle it
- * @pp: List of the partitions parsed so far
- * @bdev: Device holding the LDM Database
+ * @state: Partition check state including device holding the LDM Database
*
* This determines whether the device @bdev is a dynamic disk and if so creates
* the partitions necessary in the gendisk structure pointed to by @hd.
* example, if the device is hda, we would have: hda1: LDM database, hda2, hda3,
* and so on: the actual data containing partitions.
*
- * Return: 1 Success, @bdev is a dynamic disk and we handled it
- * 0 Success, @bdev is not a dynamic disk
+ * Return: 1 Success, @state->bdev is a dynamic disk and we handled it
+ * 0 Success, @state->bdev is not a dynamic disk
* -1 An error occurred before enough information had been read
- * Or @bdev is a dynamic disk, but it may be corrupted
+ * Or @state->bdev is a dynamic disk, but it may be corrupted
*/
-int ldm_partition (struct parsed_partitions *pp, struct block_device *bdev)
+int ldm_partition(struct parsed_partitions *state)
{
struct ldmdb *ldb;
unsigned long base;
int result = -1;
- BUG_ON (!pp || !bdev);
+ BUG_ON(!state);
/* Look for signs of a Dynamic Disk */
- if (!ldm_validate_partition_table (bdev))
+ if (!ldm_validate_partition_table(state))
return 0;
ldb = kmalloc (sizeof (*ldb), GFP_KERNEL);
}
/* Parse and check privheads. */
- if (!ldm_validate_privheads (bdev, &ldb->ph))
+ if (!ldm_validate_privheads(state, &ldb->ph))
goto out; /* Already logged */
/* All further references are relative to base (database start). */
base = ldb->ph.config_start;
/* Parse and check tocs and vmdb. */
- if (!ldm_validate_tocblocks (bdev, base, ldb) ||
- !ldm_validate_vmdb (bdev, base, ldb))
+ if (!ldm_validate_tocblocks(state, base, ldb) ||
+ !ldm_validate_vmdb(state, base, ldb))
goto out; /* Already logged */
/* Initialize vblk lists in ldmdb struct */
INIT_LIST_HEAD (&ldb->v_comp);
INIT_LIST_HEAD (&ldb->v_part);
- if (!ldm_get_vblks (bdev, base, ldb)) {
+ if (!ldm_get_vblks(state, base, ldb)) {
ldm_crit ("Failed to read the VBLKs from the database.");
goto cleanup;
}
/* Finally, create the data partition devices. */
- if (ldm_create_data_partitions (pp, ldb)) {
+ if (ldm_create_data_partitions(state, ldb)) {
ldm_debug ("Parsed LDM database successfully.");
result = 1;
}
git.openpandora.org / pandora-kernel.git / blobdiff