/*
* superblocks.c - reads information from filesystem and raid superblocks
*
* Copyright (C) 2008-2009 Karel Zak <kzak@redhat.com>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdint.h>
#include <stdarg.h>
#include "blkdev.h"
#include "blkidP.h"
#include "superblocks.h"
/**
* SECTION:superblocks
* @title: Superblocks probing
* @short_description: filesystems and raids superblocks probing.
*
* The library API has been originaly designed for superblocks probing only.
* This is reason why some *deprecated* superblock specific functions don't use
* '_superblocks_' namespace in the function name. Please, don't use these
* functions in new code.
*
* The 'superblocks' probers support NAME=value (tags) interface only. The
* superblocks probing is enabled by default (and controled by
* blkid_probe_enable_superblocks()).
*
* Currently supported tags:
*
* @TYPE: filesystem type
*
* @SEC_TYPE: secondary filesystem type
*
* @LABEL: filesystem label
*
* @LABEL_RAW: raw label from FS superblock
*
* @UUID: filesystem UUID (lower case)
*
* @UUID_SUB: subvolume uuid (e.g. btrfs)
*
* @UUID_RAW: raw UUID from FS superblock
*
* @EXT_JOURNAL: external journal UUID
*
* @USAGE: usage string: "raid", "filesystem", ...
*
* @VERSION: filesystem version
*
* @MOUNT: cluster mount name (?) -- ocfs only
*
* @SBMAGIC: super block magic string
*
* @SBMAGIC_OFFSET: offset of SBMAGIC
*
* @FSSIZE: size of filessystem [not-implemented yet]
*/
static int superblocks_probe(blkid_probe pr, struct blkid_chain *chn);
static int superblocks_safeprobe(blkid_probe pr, struct blkid_chain *chn);
static void superblocks_free(blkid_probe pr, void *data);
static int blkid_probe_set_usage(blkid_probe pr, int usage);
/*
* Superblocks chains probing functions
*/
static const struct blkid_idinfo *idinfos[] =
{
/* RAIDs */
&linuxraid_idinfo,
&ddfraid_idinfo,
&iswraid_idinfo,
&lsiraid_idinfo,
&viaraid_idinfo,
&silraid_idinfo,
&nvraid_idinfo,
&pdcraid_idinfo,
&highpoint45x_idinfo,
&highpoint37x_idinfo,
&adraid_idinfo,
&jmraid_idinfo,
&drbd_idinfo,
&lvm2_idinfo,
&lvm1_idinfo,
&snapcow_idinfo,
&luks_idinfo,
&vmfs_volume_idinfo,
/* Filesystems */
&vfat_idinfo,
&swsuspend_idinfo,
&swap_idinfo,
&xfs_idinfo,
&ext4dev_idinfo,
&ext4_idinfo,
&ext3_idinfo,
&ext2_idinfo,
&jbd_idinfo,
&reiser_idinfo,
&reiser4_idinfo,
&jfs_idinfo,
&udf_idinfo,
&iso9660_idinfo,
&zfs_idinfo,
&hfsplus_idinfo,
&hfs_idinfo,
&ufs_idinfo,
&hpfs_idinfo,
&sysv_idinfo,
&xenix_idinfo,
&ntfs_idinfo,
&cramfs_idinfo,
&romfs_idinfo,
&minix_idinfo,
&gfs_idinfo,
&gfs2_idinfo,
&ocfs_idinfo,
&ocfs2_idinfo,
&oracleasm_idinfo,
&vxfs_idinfo,
&squashfs_idinfo,
&netware_idinfo,
&btrfs_idinfo,
&ubifs_idinfo,
&bfs_idinfo,
&vmfs_fs_idinfo,
&befs_idinfo
};
/*
* Driver definition
*/
const struct blkid_chaindrv superblocks_drv = {
.id = BLKID_CHAIN_SUBLKS,
.name = "superblocks",
.dflt_enabled = TRUE,
.dflt_flags = BLKID_SUBLKS_DEFAULT,
.idinfos = idinfos,
.nidinfos = ARRAY_SIZE(idinfos),
.has_fltr = TRUE,
.probe = superblocks_probe,
.safeprobe = superblocks_safeprobe,
.free_data = superblocks_free
};
/*
* Private chain data
*
* TODO: export this data by binary interface (see topology.c or partitions.c
* for more details) by blkid_probe_get_superblock() or so.
*/
struct blkid_struct_superblock {
blkid_loff_t magic_off; /* offset of the magic string */
int usage;
};
/* TODO: move to blkid.h */
typedef struct blkid_struct_superblock *blkid_superblock;
/**
* blkid_probe_enable_superblocks:
* @pr: probe
* @enable: TRUE/FALSE
*
* Enables/disables the superblocks probing for non-binary interface.
*
* Returns: 0 on success, or -1 in case of error.
*/
int blkid_probe_enable_superblocks(blkid_probe pr, int enable)
{
if (!pr)
return -1;
pr->chains[BLKID_CHAIN_SUBLKS].enabled = enable;
return 0;
}
/**
* blkid_probe_set_superblocks_flags:
* @pr: prober
* @flags: BLKID_SUBLKS_* flags
*
* Sets probing flags to the superblocks prober. This function is optional, the
* default are BLKID_SUBLKS_DEFAULTS flags.
*
* Returns: 0 on success, or -1 in case of error.
*/
int blkid_probe_set_superblocks_flags(blkid_probe pr, int flags)
{
if (!pr)
return -1;
pr->chains[BLKID_CHAIN_SUBLKS].flags = flags;
return 0;
}
/**
* blkid_probe_reset_superblocks_filter:
* @pr: prober
*
* Resets superblocks probing filter
*
* Returns: 0 on success, or -1 in case of error.
*/
int blkid_probe_reset_superblocks_filter(blkid_probe pr)
{
return __blkid_probe_reset_filter(pr, BLKID_CHAIN_SUBLKS);
}
/**
* blkid_probe_invert_superblocks_filter:
* @pr: prober
*
* Inverts superblocks probing filter
*
* Returns: 0 on success, or -1 in case of error.
*/
int blkid_probe_invert_superblocks_filter(blkid_probe pr)
{
return __blkid_probe_invert_filter(pr, BLKID_CHAIN_SUBLKS);
}
/**
* blkid_probe_filter_superblocks_type:
* @pr: prober
* @flag: filter BLKID_FLTR_{NOTIN,ONLYIN} flag
* @names: NULL terminated array of probing function names (e.g. "vfat").
*
* BLKID_FLTR_NOTIN - probe for all items which are NOT IN @names
* BLKID_FLTR_ONLYIN - probe for items which are IN @names
*
* Returns: 0 on success, or -1 in case of error.
*/
int blkid_probe_filter_superblocks_type(blkid_probe pr, int flag, char *names[])
{
return __blkid_probe_filter_types(pr, BLKID_CHAIN_SUBLKS, flag, names);
}
/**
* blkid_probe_filter_superblocks_usage:
* @pr: prober
* @flag: filter BLKID_FLTR_{NOTIN,ONLYIN} flag
* @usage: BLKID_USAGE_* flags
*
* BLKID_FLTR_NOTIN - probe for all items which are NOT IN @usage
* BLKID_FLTR_ONLYIN - probe for items which are IN @usage
*
* Returns: 0 on success, or -1 in case of error.
*/
int blkid_probe_filter_superblocks_usage(blkid_probe pr, int flag, int usage)
{
unsigned long *fltr;
struct blkid_chain *chn;
int i;
if (!pr)
return -1;
fltr = blkid_probe_get_filter(pr, BLKID_CHAIN_SUBLKS, TRUE);
if (!fltr)
return -1;
chn = &pr->chains[BLKID_CHAIN_SUBLKS];
for (i = 0; i < chn->driver->nidinfos; i++) {
const struct blkid_idinfo *id = chn->driver->idinfos[i];
if (id->usage & usage) {
if (flag & BLKID_FLTR_NOTIN)
blkid_bmp_set_item(chn->fltr, i);
} else if (flag & BLKID_FLTR_ONLYIN)
blkid_bmp_set_item(chn->fltr, i);
}
DBG(DEBUG_LOWPROBE, printf("a new probing usage-filter initialized\n"));
return 0;
}
/**
* blkid_known_fstype:
* @fstype: filesystem name
*
* Returns: 1 for known filesytems, or 0 for unknown filesystem.
*/
int blkid_known_fstype(const char *fstype)
{
int i;
if (!fstype)
return 0;
for (i = 0; i < ARRAY_SIZE(idinfos); i++) {
const struct blkid_idinfo *id = idinfos[i];
if (strcmp(id->name, fstype) == 0)
return 1;
}
return 0;
}
/* init and returns private data */
static blkid_superblock superblocks_init_data(blkid_probe pr,
struct blkid_chain *chn)
{
DBG(DEBUG_LOWPROBE, printf("initialize superblocks binary data\n"));
if (chn->data)
memset(chn->data, 0,
sizeof(struct blkid_struct_superblock));
else {
chn->data = calloc(1,
sizeof(struct blkid_struct_superblock));
if (!chn->data)
return NULL;
}
return chn->data;
}
static void superblocks_free(blkid_probe pr, void *data)
{
free(data);
}
static blkid_superblock superblocks_copy_data(blkid_superblock dest,
blkid_superblock src)
{
if (!src || !dest)
return NULL;
memcpy(dest, src, sizeof(struct blkid_struct_superblock));
return dest;
}
/*
* The blkid_do_probe() backend.
*/
static int superblocks_probe(blkid_probe pr, struct blkid_chain *chn)
{
int i = 0;
if (!pr || chn->idx < -1)
return -1;
blkid_probe_chain_reset_vals(pr, chn);
DBG(DEBUG_LOWPROBE,
printf("--> starting probing loop [SUBLKS idx=%d]\n",
chn->idx));
if (pr->size <= 0 || (pr->size <= 1024 && !S_ISCHR(pr->mode)))
/* Ignore very very small block devices or regular files (e.g.
* extended partitions). Note that size of the UBI char devices
* is 1 byte */
goto nothing;
if (chn->binary)
superblocks_init_data(pr, chn);
i = chn->idx + 1;
for ( ; i < ARRAY_SIZE(idinfos); i++) {
const struct blkid_idinfo *id;
const struct blkid_idmag *mag;
blkid_loff_t off = 0;
int hasmag = 0;
chn->idx = i;
if (chn->fltr && blkid_bmp_get_item(chn->fltr, i))
continue;
id = idinfos[i];
if (id->minsz && id->minsz > pr->size)
continue; /* the device is too small */
mag = id->magics ? &id->magics[0] : NULL;
/* don't probe for RAIDs, swap or journal on floppies */
if ((id->usage & (BLKID_USAGE_RAID | BLKID_USAGE_OTHER)) &&
blkid_probe_is_tiny(pr))
continue;
/* don't probe for RAIDs, swap or journal on floppies or CD/DVDs */
if ((id->usage & (BLKID_USAGE_RAID | BLKID_USAGE_OTHER)) &&
(blkid_probe_is_tiny(pr) || blkid_probe_is_cdrom(pr)))
continue;
DBG(DEBUG_LOWPROBE, printf("[%d] %s:\n", i, id->name));
/* try to detect by magic string */
while(mag && mag->magic) {
unsigned char *buf;
off = (mag->kboff + (mag->sboff >> 10)) << 10;
buf = blkid_probe_get_buffer(pr, off, 1024);
if (buf && !memcmp(mag->magic,
buf + (mag->sboff & 0x3ff), mag->len)) {
DBG(DEBUG_LOWPROBE, printf(
"\tmagic sboff=%u, kboff=%ld\n",
mag->sboff, mag->kboff));
hasmag = 1;
off += mag->sboff & 0x3ff;
break;
}
mag++;
}
if (hasmag == 0 && id->magics && id->magics[0].magic)
/* magic string(s) defined, but not found */
continue;
/* final check by probing function */
if (id->probefunc) {
DBG(DEBUG_LOWPROBE, printf("\tcall probefunc()\n"));
if (id->probefunc(pr, mag) != 0) {
blkid_probe_chain_reset_vals(pr, chn);
continue;
}
}
/* all cheks passed */
if (chn->flags & BLKID_SUBLKS_TYPE)
blkid_probe_set_value(pr, "TYPE",
(unsigned char *) id->name,
strlen(id->name) + 1);
blkid_probe_set_usage(pr, id->usage);
if (hasmag)
blkid_probe_set_magic(pr, off, mag->len,
(unsigned char *) mag->magic);
DBG(DEBUG_LOWPROBE,
printf("<-- leaving probing loop (type=%s) [SUBLKS idx=%d]\n",
id->name, chn->idx));
return 0;
}
nothing:
DBG(DEBUG_LOWPROBE,
printf("<-- leaving probing loop (failed) [SUBLKS idx=%d]\n",
chn->idx));
return 1;
}
/*
* This is the same function as blkid_do_probe(), but returns only one result
* (cannot be used in while()) and checks for ambivalen results (more
* filesystems on the device) -- in such case returns -2.
*
* The function does not check for filesystems when a RAID or crypto signature
* is detected. The function also does not check for collision between RAIDs
* and crypto devices. The first detected RAID or crypto device is returned.
*
* The function does not probe for ambivalent results on very small devices
* (e.g. floppies), on small devices the first detected filesystem is returned.
*/
static int superblocks_safeprobe(blkid_probe pr, struct blkid_chain *chn)
{
blkid_superblock sb = NULL;
struct blkid_struct_superblock sb_buff;
struct blkid_prval vals[BLKID_NVALS_SUBLKS];
int nvals = BLKID_NVALS_SUBLKS;
int idx = -1;
int count = 0;
int intol = 0;
int rc, bin_org = chn->binary;
chn->binary = TRUE;
while ((rc = superblocks_probe(pr, chn)) == 0) {
if (blkid_probe_is_tiny(pr) && !count) {
/* floppy or so -- returns the first result. */
chn->binary = bin_org;
return 0;
}
if (!count) {
/* save the first result */
nvals = blkid_probe_chain_copy_vals(pr, chn, vals, nvals);
idx = chn->idx;
if (chn->data)
sb = superblocks_copy_data(&sb_buff, chn->data);
}
count++;
if (idinfos[chn->idx]->usage & (BLKID_USAGE_RAID | BLKID_USAGE_CRYPTO))
break;
if (!(idinfos[chn->idx]->flags & BLKID_IDINFO_TOLERANT))
intol++;
}
chn->binary = bin_org;
if (rc < 0)
return rc; /* error */
if (count > 1 && intol) {
DBG(DEBUG_LOWPROBE,
printf("ERROR: superblocks chain: "
"ambivalent result detected (%d filesystems)!\n",
count));
return -2; /* error, ambivalent result (more FS) */
}
if (!count)
return 1; /* nothing detected */
/* restore the first result */
blkid_probe_chain_reset_vals(pr, chn);
blkid_probe_append_vals(pr, vals, nvals);
if (sb && chn->data)
superblocks_copy_data(chn->data, sb);
chn->idx = idx;
/*
* Check for collisions between RAID and partition table
*/
if (sb && sb->usage == BLKID_USAGE_RAID &&
sb->magic_off > pr->size / 2 &&
(S_ISREG(pr->mode) || blkid_probe_is_wholedisk(pr)) &&
blkid_probe_is_covered_by_pt(pr, sb->magic_off, 0x200)) {
/*
* Ignore the result if the detected RAID superblock is
* within some existing partition (for example RAID on
* the last partition).
*/
blkid_probe_chain_reset_vals(pr, chn);
return 1;
}
/*
* The RAID device could be partitioned. The problem are RAID1 devices
* where the partition table is visible from underlaying devices. We
* have to ignore such partition tables.
*/
if (sb && sb->usage == BLKID_USAGE_RAID)
pr->prob_flags |= BLKID_PARTS_IGNORE_PT;
return 0;
}
int blkid_probe_set_magic(blkid_probe pr, blkid_loff_t offset,
size_t len, unsigned char *magic)
{
int rc = 0;
struct blkid_chain *chn = blkid_probe_get_chain(pr);
if (chn->flags & BLKID_SUBLKS_MAGIC) {
if (magic && len)
rc = blkid_probe_set_value(pr, "SBMAGIC", magic, len);
if (!rc && offset)
rc = blkid_probe_sprintf_value(pr, "SBMAGIC_OFFSET",
"%llu", offset);
}
if (!rc && chn->data) {
blkid_superblock sb = (blkid_superblock) chn->data;
sb->magic_off = offset;
}
return rc;
}
int blkid_probe_set_version(blkid_probe pr, const char *version)
{
struct blkid_chain *chn = blkid_probe_get_chain(pr);
if (chn->flags & BLKID_SUBLKS_VERSION)
return blkid_probe_set_value(pr, "VERSION",
(unsigned char *) version, strlen(version) + 1);
return 0;
}
int blkid_probe_sprintf_version(blkid_probe pr, const char *fmt, ...)
{
struct blkid_chain *chn = blkid_probe_get_chain(pr);
int rc = 0;
if (chn->flags & BLKID_SUBLKS_VERSION) {
va_list ap;
va_start(ap, fmt);
rc = blkid_probe_vsprintf_value(pr, "VERSION", fmt, ap);
va_end(ap);
}
return rc;
}
static int blkid_probe_set_usage(blkid_probe pr, int usage)
{
struct blkid_chain *chn = blkid_probe_get_chain(pr);
char *u = NULL;
if (chn->data) {
blkid_superblock sb = (blkid_superblock) chn->data;
sb->usage = usage;
}
if (!(chn->flags & BLKID_SUBLKS_USAGE))
return 0;
if (usage & BLKID_USAGE_FILESYSTEM)
u = "filesystem";
else if (usage & BLKID_USAGE_RAID)
u = "raid";
else if (usage & BLKID_USAGE_CRYPTO)
u = "crypto";
else if (usage & BLKID_USAGE_OTHER)
u = "other";
else
u = "unknown";
return blkid_probe_set_value(pr, "USAGE", (unsigned char *) u, strlen(u) + 1);
}
int blkid_probe_set_label(blkid_probe pr, unsigned char *label, size_t len)
{
struct blkid_chain *chn = blkid_probe_get_chain(pr);
struct blkid_prval *v;
if (len > BLKID_PROBVAL_BUFSIZ)
len = BLKID_PROBVAL_BUFSIZ;
if ((chn->flags & BLKID_SUBLKS_LABELRAW) &&
blkid_probe_set_value(pr, "LABEL_RAW", label, len) < 0)
return -1;
if (!(chn->flags & BLKID_SUBLKS_LABEL))
return 0;
v = blkid_probe_assign_value(pr, "LABEL");
if (!v)
return -1;
if (len == BLKID_PROBVAL_BUFSIZ)
len--; /* make a space for \0 */
memcpy(v->data, label, len);
v->data[len] = '\0';
v->len = blkid_rtrim_whitespace(v->data) + 1;
if (v->len == 1)
blkid_probe_reset_last_value(pr);
return 0;
}
int blkid_probe_set_utf8label(blkid_probe pr, unsigned char *label,
size_t len, int enc)
{
struct blkid_chain *chn = blkid_probe_get_chain(pr);
struct blkid_prval *v;
if ((chn->flags & BLKID_SUBLKS_LABELRAW) &&
blkid_probe_set_value(pr, "LABEL_RAW", label, len) < 0)
return -1;
if (!(chn->flags & BLKID_SUBLKS_LABEL))
return 0;
v = blkid_probe_assign_value(pr, "LABEL");
if (!v)
return -1;
blkid_encode_to_utf8(enc, v->data, sizeof(v->data), label, len);
v->len = blkid_rtrim_whitespace(v->data) + 1;
if (v->len == 1)
blkid_probe_reset_last_value(pr);
return 0;
}
/* like uuid_is_null() from libuuid, but works with arbitrary size of UUID */
static int uuid_is_empty(const unsigned char *buf, size_t len)
{
int i;
for (i = 0; i < len; i++)
if (buf[i])
return 0;
return 1;
}
int blkid_probe_sprintf_uuid(blkid_probe pr, unsigned char *uuid,
size_t len, const char *fmt, ...)
{
struct blkid_chain *chn = blkid_probe_get_chain(pr);
int rc = -1;
va_list ap;
if (len > BLKID_PROBVAL_BUFSIZ)
len = BLKID_PROBVAL_BUFSIZ;
if (uuid_is_empty(uuid, len))
return 0;
if ((chn->flags & BLKID_SUBLKS_UUIDRAW) &&
blkid_probe_set_value(pr, "UUID_RAW", uuid, len) < 0)
return -1;
if (!(chn->flags & BLKID_SUBLKS_UUID))
return 0;
va_start(ap, fmt);
rc = blkid_probe_vsprintf_value(pr, "UUID", fmt, ap);
va_end(ap);
/* convert to lower case (..be paranoid) */
if (!rc) {
int i;
struct blkid_prval *v = __blkid_probe_get_value(pr,
blkid_probe_numof_values(pr));
if (v) {
for (i = 0; i < v->len; i++)
if (v->data[i] >= 'A' && v->data[i] <= 'F')
v->data[i] = (v->data[i] - 'A') + 'a';
}
}
return rc;
}
/* function to set UUIDs that are in suberblocks stored as strings */
int blkid_probe_strncpy_uuid(blkid_probe pr, unsigned char *str, size_t len)
{
struct blkid_chain *chn = blkid_probe_get_chain(pr);
struct blkid_prval *v;
if (str == NULL || *str == '\0')
return -1;
if (!len)
len = strlen((char *) str);
if (len > BLKID_PROBVAL_BUFSIZ)
len = BLKID_PROBVAL_BUFSIZ;
if ((chn->flags & BLKID_SUBLKS_UUIDRAW) &&
blkid_probe_set_value(pr, "UUID_RAW", str, len) < 0)
return -1;
if (!(chn->flags & BLKID_SUBLKS_UUID))
return 0;
v = blkid_probe_assign_value(pr, "UUID");
if (v) {
if (len == BLKID_PROBVAL_BUFSIZ)
len--; /* make a space for \0 */
memcpy((char *) v->data, str, len);
v->data[len] = '\0';
v->len = len + 1;
return 0;
}
return -1;
}
/* default _set_uuid function to set DCE UUIDs */
int blkid_probe_set_uuid_as(blkid_probe pr, unsigned char *uuid, const char *name)
{
struct blkid_chain *chn = blkid_probe_get_chain(pr);
struct blkid_prval *v;
if (uuid_is_empty(uuid, 16))
return 0;
if (!name) {
if ((chn->flags & BLKID_SUBLKS_UUIDRAW) &&
blkid_probe_set_value(pr, "UUID_RAW", uuid, 16) < 0)
return -1;
if (!(chn->flags & BLKID_SUBLKS_UUID))
return 0;
v = blkid_probe_assign_value(pr, "UUID");
} else
v = blkid_probe_assign_value(pr, name);
blkid_unparse_uuid(uuid, (char *) v->data, sizeof(v->data));
v->len = 37;
return 0;
}
int blkid_probe_set_uuid(blkid_probe pr, unsigned char *uuid)
{
return blkid_probe_set_uuid_as(pr, uuid, NULL);
}
/*
* DEPRECATED FUNCTIONS
*/
/**
* blkid_probe_set_request:
* @pr: probe
* @flags: BLKID_PROBREQ_* (deprecated) or BLKID_SUBLKS_* flags
*
* Returns: 0 on success, or -1 in case of error.
*
* Deprecated: Use blkid_probe_set_superblocks_flags().
*/
int blkid_probe_set_request(blkid_probe pr, int flags)
{
return blkid_probe_set_superblocks_flags(pr, flags);
}
/**
* blkid_probe_reset_filter:
* @pr: prober
*
* Returns: 0 on success, or -1 in case of error.
*
* Deprecated: Use blkid_probe_reset_superblocks_filter().
*/
int blkid_probe_reset_filter(blkid_probe pr)
{
return __blkid_probe_reset_filter(pr, BLKID_CHAIN_SUBLKS);
}
/**
* blkid_probe_invert_filter:
* @pr: prober
*
* Returns: 0 on success, or -1 in case of error.
*
* Deprecated: Use blkid_probe_invert_superblocks_filter().
*/
int blkid_probe_invert_filter(blkid_probe pr)
{
return __blkid_probe_invert_filter(pr, BLKID_CHAIN_SUBLKS);
}
/**
* blkid_probe_filter_types
* @pr: prober
* @flag: filter BLKID_FLTR_{NOTIN,ONLYIN} flag
* @names: NULL terminated array of probing function names (e.g. "vfat").
*
* Returns: 0 on success, or -1 in case of error.
*
* Deprecated: Use blkid_probe_filter_superblocks_types().
*/
int blkid_probe_filter_types(blkid_probe pr, int flag, char *names[])
{
return __blkid_probe_filter_types(pr, BLKID_CHAIN_SUBLKS, flag, names);
}
/**
* blkid_probe_filter_usage
* @pr: prober
* @flag: filter BLKID_FLTR_{NOTIN,ONLYIN} flag
* @usage: BLKID_USAGE_* flags
*
* Returns: 0 on success, or -1 in case of error.
*
* Deprecated: Use blkid_probe_filter_superblocks_usage().
*/
int blkid_probe_filter_usage(blkid_probe pr, int flag, int usage)
{
return blkid_probe_filter_superblocks_usage(pr, flag, usage);
}
