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lvm2/lib/device/dev-type.h

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refactor: make device type recognition code common for general use Changes: - move device type registration out of "type filter" (filter.c) to a separate and new dev-type.[ch] for common use throughout the code - the structure for keeping the major numbers detected for available device types and available partitioning available is stored in "dev_types" structure now - move common partitioning detection code to dev-type.[ch] as well together with other device-related functions bound to dev_types (see dev-type.h for the interface) The dev-type interface contains all common functions used to detect subsystems/device types, signature/superblock recognition code, type-specific device properties and other common device properties (bound to dev_types), including partitioning support. - add dev_types instance to cmd context as cmd->dev_types for common use - use cmd->dev_types throughout as a central point for providing information about device types
2013-06-12 14:08:56 +04:00
/*
* Copyright (C) 2013 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_DEV_TYPE_H
#define _LVM_DEV_TYPE_H
#include "device.h"
device: cleanup signature wiping functions The wipe_known_signatures fn now wraps the _wipe_signature fn that is called for each known signature (currently md, swap and luks). This patch makes the code more readable, not repeating the same sequence when used anywhere in the code. We're going to reuse this code later...
2013-11-06 18:09:29 +04:00
#include "display.h"
refactor: make device type recognition code common for general use Changes: - move device type registration out of "type filter" (filter.c) to a separate and new dev-type.[ch] for common use throughout the code - the structure for keeping the major numbers detected for available device types and available partitioning available is stored in "dev_types" structure now - move common partitioning detection code to dev-type.[ch] as well together with other device-related functions bound to dev_types (see dev-type.h for the interface) The dev-type interface contains all common functions used to detect subsystems/device types, signature/superblock recognition code, type-specific device properties and other common device properties (bound to dev_types), including partitioning support. - add dev_types instance to cmd context as cmd->dev_types for common use - use cmd->dev_types throughout as a central point for providing information about device types
2013-06-12 14:08:56 +04:00
#define NUMBER_OF_MAJORS 4096
gcc: replace #ifdef linux with __linux__
2013-11-13 17:56:29 +04:00
#ifdef __linux__
refactor: make device type recognition code common for general use Changes: - move device type registration out of "type filter" (filter.c) to a separate and new dev-type.[ch] for common use throughout the code - the structure for keeping the major numbers detected for available device types and available partitioning available is stored in "dev_types" structure now - move common partitioning detection code to dev-type.[ch] as well together with other device-related functions bound to dev_types (see dev-type.h for the interface) The dev-type interface contains all common functions used to detect subsystems/device types, signature/superblock recognition code, type-specific device properties and other common device properties (bound to dev_types), including partitioning support. - add dev_types instance to cmd context as cmd->dev_types for common use - use cmd->dev_types throughout as a central point for providing information about device types
2013-06-12 14:08:56 +04:00
# define MAJOR(dev) ((dev & 0xfff00) >> 8)
# define MINOR(dev) ((dev & 0xff) | ((dev >> 12) & 0xfff00))
# define MKDEV(ma,mi) ((mi & 0xff) | (ma << 8) | ((mi & ~0xff) << 12))
#else
# define MAJOR(x) major((x))
# define MINOR(x) minor((x))
# define MKDEV(x,y) makedev((x),(y))
#endif
#define PARTITION_SCSI_DEVICE (1 << 0)
struct dev_type_def {
int max_partitions; /* 0 means LVM won't use this major number. */
int flags;
};
struct dev_types {
int md_major;
int blkext_major;
int drbd_major;
int device_mapper_major;
int emcpower_major;
int power2_major;
struct dev_type_def dev_type_array[NUMBER_OF_MAJORS];
};
struct dev_types *create_dev_types(const char *proc_dir, const struct dm_config_node *cn);
/* Subsystems */
int dev_subsystem_part_major(struct dev_types *dt, struct device *dev);
const char *dev_subsystem_name(struct dev_types *dt, struct device *dev);
int major_is_scsi_device(struct dev_types *dt, int major);
/* Signature/superblock recognition with position returned where found. */
int dev_is_md(struct device *dev, uint64_t *sb);
int dev_is_swap(struct device *dev, uint64_t *signature);
int dev_is_luks(struct device *dev, uint64_t *signature);
device: cleanup signature wiping functions The wipe_known_signatures fn now wraps the _wipe_signature fn that is called for each known signature (currently md, swap and luks). This patch makes the code more readable, not repeating the same sequence when used anywhere in the code. We're going to reuse this code later...
2013-11-06 18:09:29 +04:00
/* Signature wiping. */
wiping: wipe DM_snapshot_cow signature without prompt in newly created LVs The libblkid can detect DM_snapshot_cow signature and when creating new LVs with blkid wiping used (allocation/use_blkid_wiping=1 lvm.conf setting and --wipe y used at the same time - which it is by default). Do not issue any prompts about this signature when new LV is created and just wipe it right away without asking questions. Still keep the log in verbose mode though.
2014-02-10 16:28:13 +04:00
#define TYPE_LVM1_MEMBER 0x001
#define TYPE_LVM2_MEMBER 0x002
#define TYPE_DM_SNAPSHOT_COW 0x004
pvcreate: do not issue warning about any existing PV If we're calling pvcreate on a device that already has a PV label, the blkid detects the existing PV and then we consider it for wiping before we continue creating the new PV label and we issue a warning with a prompt whether such old PV label should be removed. We don't do this with native signature detection code. Let's make it consistent with old behaviour. But still keep this "PV" (identified as "LVM1_member" or "LVM2_member" by blkid) detection when creating new LVs to avoid unexpected PV label appeareance inside LV.
2013-11-28 16:14:46 +04:00
int wipe_known_signatures(struct cmd_context *cmd, struct device *dev, const char *name,
wiping: wipe DM_snapshot_cow signature without prompt in newly created LVs The libblkid can detect DM_snapshot_cow signature and when creating new LVs with blkid wiping used (allocation/use_blkid_wiping=1 lvm.conf setting and --wipe y used at the same time - which it is by default). Do not issue any prompts about this signature when new LV is created and just wipe it right away without asking questions. Still keep the log in verbose mode though.
2014-02-10 16:28:13 +04:00
uint32_t types_to_exclude, uint32_t types_no_prompt,
int yes, force_t force);
device: cleanup signature wiping functions The wipe_known_signatures fn now wraps the _wipe_signature fn that is called for each known signature (currently md, swap and luks). This patch makes the code more readable, not repeating the same sequence when used anywhere in the code. We're going to reuse this code later...
2013-11-06 18:09:29 +04:00
refactor: make device type recognition code common for general use Changes: - move device type registration out of "type filter" (filter.c) to a separate and new dev-type.[ch] for common use throughout the code - the structure for keeping the major numbers detected for available device types and available partitioning available is stored in "dev_types" structure now - move common partitioning detection code to dev-type.[ch] as well together with other device-related functions bound to dev_types (see dev-type.h for the interface) The dev-type interface contains all common functions used to detect subsystems/device types, signature/superblock recognition code, type-specific device properties and other common device properties (bound to dev_types), including partitioning support. - add dev_types instance to cmd context as cmd->dev_types for common use - use cmd->dev_types throughout as a central point for providing information about device types
2013-06-12 14:08:56 +04:00
/* Type-specific device properties */
unsigned long dev_md_stripe_width(struct dev_types *dt, struct device *dev);
/* Partitioning */
int major_max_partitions(struct dev_types *dt, int major);
int dev_is_partitioned(struct dev_types *dt, struct device *dev);
int dev_get_primary_dev(struct dev_types *dt, struct device *dev, dev_t *result);
/* Various device properties */
unsigned long dev_alignment_offset(struct dev_types *dt, struct device *dev);
unsigned long dev_minimum_io_size(struct dev_types *dt, struct device *dev);
unsigned long dev_optimal_io_size(struct dev_types *dt, struct device *dev);
unsigned long dev_discard_max_bytes(struct dev_types *dt, struct device *dev);
unsigned long dev_discard_granularity(struct dev_types *dt, struct device *dev);
#endif
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