/*
- * Copyright (C) 2007-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007-2009 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
* \param map The memory mapping of the index file.
* \param desc The values found in the index header are returned here.
*
- * Read the index header, check for the paraslash magic string and the table version number.
- * Read all information stored in the index header into \a desc.
+ * Read the index header, check for the osl magic string and the table version
+ * number. Read all information stored in the index header into \a desc.
*
* \return Standard.
*
int read_table_desc(struct osl_object *map, struct osl_table_description *desc)
{
char *buf = map->data;
- uint8_t version;
+ uint8_t version, compat_version, create_version;
uint16_t header_size;
int ret, i;
unsigned offset;
if (map->size < MIN_INDEX_HEADER_SIZE(1))
return -E_OSL_SHORT_TABLE;
- if (strncmp(buf + IDX_PARA_MAGIC, PARA_MAGIC, strlen(PARA_MAGIC)))
+ if (strncmp(buf + IDX_OSL_MAGIC, OSL_MAGIC, strlen(OSL_MAGIC)))
return -E_OSL_NO_MAGIC;
version = read_u8(buf + IDX_VERSION);
- if (version < MIN_TABLE_VERSION || version > MAX_TABLE_VERSION)
+ /*
+ * The on-disk version consists of two version numbers: the
+ * create_version (low 4 bits) is the CURRENT_TABLE_VERSION version
+ * number of the library that created the table, and compat_version
+ * (high 4 bits) tells us the lowest version of the library that can
+ * still read this table.
+ */
+ create_version = version & 0xf;
+ compat_version = version >> 4;
+ INFO_LOG("create_version: %u, compat_version: %u\n", create_version,
+ compat_version);
+ if (create_version < MIN_TABLE_VERSION /* table too old */
+ || compat_version > CURRENT_TABLE_VERSION) /* libosl too old */
return -E_OSL_VERSION_MISMATCH;
desc->flags = read_u8(buf + IDX_TABLE_FLAGS);
desc->num_columns = read_u16(buf + IDX_NUM_COLUMNS);
buf = calloc(1, size);
if (!buf)
return -E_OSL_NOMEM;
- sprintf(buf + IDX_PARA_MAGIC, "%s", PARA_MAGIC);
+ sprintf(buf + IDX_OSL_MAGIC, "%s", OSL_MAGIC);
write_u8(buf + IDX_TABLE_FLAGS, t->desc->flags);
write_u8(buf + IDX_DIRTY_FLAG, 0);
- write_u8(buf + IDX_VERSION, CURRENT_TABLE_VERSION);
+ write_u8(buf + IDX_VERSION, CURRENT_TABLE_VERSION
+ + (COMPAT_TABLE_VERSION << 4));
write_u16(buf + IDX_NUM_COLUMNS, t->num_mapped_columns + t->num_disk_storage_columns);
write_u16(buf + IDX_HEADER_SIZE, t->index_header_size);
offset = IDX_COLUMN_DESCRIPTIONS;
if (!dirname)
goto err;
/* check if directory exists */
- ret = stat(dirname, &statbuf);
+ ret = osl_stat(dirname, &statbuf);
free(dirname);
- if (ret < 0) {
- ret = -E_OSL_STAT;
+ if (ret < 0)
goto err;
- }
ret = -E_OSL_NOTDIR;
if (!S_ISDIR(statbuf.st_mode))
goto err;