You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

263 lines
8.6 KiB

/*
* Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved.
* Written by Milan Broz <mbroz@redhat.com>
* Karel Zak <kzak@redhat.com>
*/
#ifndef UTIL_LINUX_LSBLK_H
#define UTIL_LINUX_LSBLK_H
#include <stdint.h>
#include <inttypes.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <libsmartcols.h>
#include <libmount.h>
#include "c.h"
#include "list.h"
#include "debug.h"
#define LSBLK_DEBUG_INIT (1 << 1)
#define LSBLK_DEBUG_FILTER (1 << 2)
#define LSBLK_DEBUG_DEV (1 << 3)
#define LSBLK_DEBUG_TREE (1 << 4)
#define LSBLK_DEBUG_DEP (1 << 5)
#define LSBLK_DEBUG_ALL 0xFFFF
UL_DEBUG_DECLARE_MASK(lsblk);
#define DBG(m, x) __UL_DBG(lsblk, LSBLK_DEBUG_, m, x)
#define ON_DBG(m, x) __UL_DBG_CALL(lsblk, LSBLK_DEBUG_, m, x)
#define UL_DEBUG_CURRENT_MASK UL_DEBUG_MASK(lsblk)
#include "debugobj.h"
struct lsblk {
struct libscols_table *table; /* output table */
struct libscols_column *sort_col;/* sort output by this column */
int sort_id; /* id of the sort column */
int tree_id; /* od of column used for tree */
int dedup_id;
const char *sysroot;
int flags; /* LSBLK_* */
unsigned int all_devices:1; /* print all devices, including empty */
unsigned int bytes:1; /* print SIZE in bytes */
unsigned int inverse:1; /* print inverse dependencies */
unsigned int merge:1; /* merge sub-trees */
unsigned int nodeps:1; /* don't print slaves/holders */
unsigned int scsi:1; /* print only device with HCTL (SCSI) */
unsigned int nvme:1; /* print NVMe device only */
unsigned int virtio:1; /* print virtio device only */
unsigned int paths:1; /* print devnames with "/dev" prefix */
unsigned int sort_hidden:1; /* sort column not between output columns */
unsigned int dedup_hidden :1; /* deduplication column not between output columns */
unsigned int force_tree_order:1;/* sort lines by parent->tree relation */
unsigned int noempty:1; /* hide empty devices */
};
extern struct lsblk *lsblk; /* global handler */
struct lsblk_devprop {
/* udev / blkid based */
char *fstype; /* detected fs, NULL or "?" if cannot detect */
char *fsversion; /* filesystem version */
char *uuid; /* filesystem UUID (or stack uuid) */
char *ptuuid; /* partition table UUID */
char *pttype; /* partition table type */
char *label; /* filesystem label */
char *parttype; /* partition type UUID */
char *partuuid; /* partition UUID */
char *partlabel; /* partition label */
char *partflags; /* partition flags */
char *wwn; /* storage WWN */
char *serial; /* disk serial number */
char *model; /* disk model */
char *idlink; /* /dev/disk/by-id/<name> */
/* lsblk specific (for --sysroot only) */
char *owner; /* user name */
char *group; /* group name */
char *mode; /* access mode in ls(1)-like notation */
};
/* Device dependence
*
* Note that the same device may be slave/holder for more another devices. It
* means we need to allocate list member rather than use @child directly.
*/
struct lsblk_devdep {
struct list_head ls_childs; /* item in parent->childs */
struct list_head ls_parents; /* item in child->parents */
struct lsblk_device *child;
struct lsblk_device *parent;
};
struct lsblk_device {
int refcount;
struct list_head childs; /* list with lsblk_devdep */
struct list_head parents;
struct list_head ls_roots; /* item in devtree->roots list */
struct list_head ls_devices; /* item in devtree->devices list */
struct lsblk_device *wholedisk; /* for partitions */
struct libscols_line *scols_line;
struct lsblk_devprop *properties;
struct stat st;
char *name; /* kernel name in /sys/block */
char *dm_name; /* DM name (dm/block) */
char *filename; /* path to device node */
char *dedupkey; /* de-duplication key */
struct path_cxt *sysfs;
struct libmnt_fs **fss; /* filesystems attached to the device */
size_t nfss; /* number of items in fss[] */
struct statvfs fsstat; /* statvfs() result */
int npartitions; /* # of partitions this device has */
int nholders; /* # of devices mapped directly to this device
* /sys/block/.../holders */
int nslaves; /* # of devices this device maps to */
int maj, min; /* devno */
uint64_t discard_granularity; /* sunknown:-1, yes:1, not:0 */
uint64_t size; /* device size */
int removable; /* unknown:-1, yes:1, not:0 */
unsigned int is_mounted : 1,
is_swap : 1,
is_printed : 1,
udev_requested : 1,
blkid_requested : 1,
file_requested : 1;
};
#define device_is_partition(_x) ((_x)->wholedisk != NULL)
/* Unfortunately, pktcdvd dependence on block device is not defined by
* slave/holder symlinks. The struct lsblk_devnomap represents one line in
* /sys/class/pktcdvd/device_map
*/
struct lsblk_devnomap {
dev_t slave; /* packet device devno */
dev_t holder; /* block device devno */
struct list_head ls_devnomap;
};
/*
* Note that lsblk tree uses bottom devices (devices without slaves) as root
* of the tree, and partitions are interpreted as a dependence too; it means:
* sda -> sda1 -> md0
*
* The flag 'is_inverted' turns the tree over (root is device without holders):
* md0 -> sda1 -> sda
*/
struct lsblk_devtree {
int refcount;
struct list_head roots; /* tree root devices */
struct list_head devices; /* all devices */
struct list_head pktcdvd_map; /* devnomap->ls_devnomap */
unsigned int is_inverse : 1, /* inverse tree */
pktcdvd_read : 1;
};
/*
* Generic iterator
*/
struct lsblk_iter {
struct list_head *p; /* current position */
struct list_head *head; /* start position */
int direction; /* LSBLK_ITER_{FOR,BACK}WARD */
};
#define LSBLK_ITER_FORWARD 0
#define LSBLK_ITER_BACKWARD 1
#define IS_ITER_FORWARD(_i) ((_i)->direction == LSBLK_ITER_FORWARD)
#define IS_ITER_BACKWARD(_i) ((_i)->direction == LSBLK_ITER_BACKWARD)
#define LSBLK_ITER_INIT(itr, list) \
do { \
(itr)->p = IS_ITER_FORWARD(itr) ? \
(list)->next : (list)->prev; \
(itr)->head = (list); \
} while(0)
#define LSBLK_ITER_ITERATE(itr, res, restype, member) \
do { \
res = list_entry((itr)->p, restype, member); \
(itr)->p = IS_ITER_FORWARD(itr) ? \
(itr)->p->next : (itr)->p->prev; \
} while(0)
/* lsblk-mnt.c */
extern void lsblk_mnt_init(void);
extern void lsblk_mnt_deinit(void);
extern void lsblk_device_free_filesystems(struct lsblk_device *dev);
extern const char *lsblk_device_get_mountpoint(struct lsblk_device *dev);
extern struct libmnt_fs **lsblk_device_get_filesystems(struct lsblk_device *dev, size_t *n);
/* lsblk-properties.c */
extern void lsblk_device_free_properties(struct lsblk_devprop *p);
extern struct lsblk_devprop *lsblk_device_get_properties(struct lsblk_device *dev);
extern void lsblk_properties_deinit(void);
extern const char *lsblk_parttype_code_to_string(const char *code, const char *pttype);
/* lsblk-devtree.c */
void lsblk_reset_iter(struct lsblk_iter *itr, int direction);
struct lsblk_device *lsblk_new_device(void);
void lsblk_ref_device(struct lsblk_device *dev);
void lsblk_unref_device(struct lsblk_device *dev);
int lsblk_device_new_dependence(struct lsblk_device *parent, struct lsblk_device *child);
int lsblk_device_has_child(struct lsblk_device *dev, struct lsblk_device *child);
int lsblk_device_next_child(struct lsblk_device *dev,
struct lsblk_iter *itr,
struct lsblk_device **child);
dev_t lsblk_devtree_pktcdvd_get_mate(struct lsblk_devtree *tr, dev_t devno, int is_slave);
int lsblk_device_is_last_parent(struct lsblk_device *dev, struct lsblk_device *parent);
int lsblk_device_next_parent(
struct lsblk_device *dev,
struct lsblk_iter *itr,
struct lsblk_device **parent);
struct lsblk_devtree *lsblk_new_devtree(void);
void lsblk_ref_devtree(struct lsblk_devtree *tr);
void lsblk_unref_devtree(struct lsblk_devtree *tr);
int lsblk_devtree_add_root(struct lsblk_devtree *tr, struct lsblk_device *dev);
int lsblk_devtree_remove_root(struct lsblk_devtree *tr, struct lsblk_device *dev);
int lsblk_devtree_next_root(struct lsblk_devtree *tr,
struct lsblk_iter *itr,
struct lsblk_device **dev);
int lsblk_devtree_add_device(struct lsblk_devtree *tr, struct lsblk_device *dev);
int lsblk_devtree_next_device(struct lsblk_devtree *tr,
struct lsblk_iter *itr,
struct lsblk_device **dev);
int lsblk_devtree_has_device(struct lsblk_devtree *tr, struct lsblk_device *dev);
struct lsblk_device *lsblk_devtree_get_device(struct lsblk_devtree *tr, const char *name);
int lsblk_devtree_remove_device(struct lsblk_devtree *tr, struct lsblk_device *dev);
int lsblk_devtree_deduplicate_devices(struct lsblk_devtree *tr);
#endif /* UTIL_LINUX_LSBLK_H */