/*
* volume_id - reads volume label and uuid
*
- * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2005-2007 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
#include "libvolume_id.h"
#include "util.h"
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+struct prober {
+ const char *type;
+ volume_id_probe_fn_t prober;
+};
+
+static const struct prober prober_raid[] = {
+ {"linux_raid_member", volume_id_probe_linux_raid },
+ {"ddf_raid_member", volume_id_probe_ddf_raid },
+ {"isw_raid_member", volume_id_probe_intel_software_raid },
+ {"lsi_mega_raid_member", volume_id_probe_lsi_mega_raid },
+ {"via_raid_member", volume_id_probe_via_raid },
+ {"silicon_medley_raid_member", volume_id_probe_silicon_medley_raid },
+ {"nvidia_raid_member", volume_id_probe_nvidia_raid },
+ {"promise_fasttrack_raid_member", volume_id_probe_promise_fasttrack_raid },
+ {"highpoint_raid_member", volume_id_probe_highpoint_45x_raid },
+ {"adaptec_raid_member", volume_id_probe_adaptec_raid },
+ {"jmicron_raid_member", volume_id_probe_jmicron_raid },
+ {"LVM1_member", volume_id_probe_lvm1 },
+ {"LVM2_member", volume_id_probe_lvm2 },
+ {"highpoint_raid_member", volume_id_probe_highpoint_37x_raid },
+};
+
+static const struct prober prober_filesystem[] = {
+ { "vfat", volume_id_probe_vfat },
+ { "linux_swap", volume_id_probe_linux_swap },
+ { "luks", volume_id_probe_luks },
+ { "xfs", volume_id_probe_xfs },
+ { "ext", volume_id_probe_ext },
+ { "reiserfs", volume_id_probe_reiserfs },
+ { "jfs", volume_id_probe_jfs },
+ { "udf", volume_id_probe_udf },
+ { "iso9660", volume_id_probe_iso9660 },
+ { "hfs", volume_id_probe_hfs_hfsplus },
+ { "ufs", volume_id_probe_ufs },
+ { "ntfs", volume_id_probe_ntfs },
+ { "cramfs", volume_id_probe_cramfs },
+ { "romfs", volume_id_probe_romfs },
+ { "hpfs", volume_id_probe_hpfs },
+ { "sysv", volume_id_probe_sysv },
+ { "minix", volume_id_probe_minix },
+ { "ocfs1", volume_id_probe_ocfs1 },
+ { "ocfs2", volume_id_probe_ocfs2 },
+ { "vxfs", volume_id_probe_vxfs },
+ { "squashfs", volume_id_probe_squashfs },
+ { "netware", volume_id_probe_netware },
+ { "gfs", volume_id_probe_gfs },
+ { "gfs2", volume_id_probe_gfs2 },
+};
+
/* the user can overwrite this log function */
static void default_log(int priority, const char *file, int line, const char *format, ...)
{
volume_id_log_fn_t volume_id_log_fn = default_log;
-int volume_id_probe_raid(struct volume_id *id, uint64_t off, uint64_t size)
+const volume_id_probe_fn_t *volume_id_get_prober_by_type(const char *type)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(prober_raid); i++)
+ if (strcmp(type, prober_raid[i].type) == 0)
+ return &prober_raid[i].prober;
+ for (i = 0; i < ARRAY_SIZE(prober_filesystem); i++)
+ if (strcmp(type, prober_filesystem[i].type) == 0)
+ return &prober_filesystem[i].prober;
+ return NULL;
+}
+
+int volume_id_get_label(struct volume_id *id, const char **label)
{
if (id == NULL)
return -EINVAL;
+ if (label == NULL)
+ return -EINVAL;
+ if (id->usage_id == VOLUME_ID_UNUSED)
+ return 0;
- info("probing at offset 0x%llx, size 0x%llx",
- (unsigned long long) off, (unsigned long long) size);
+ *label = id->label;
+ return 1;
+}
- /* probe for raid first, because fs probes may be successful on raid members */
- if (size) {
- if (volume_id_probe_linux_raid(id, off, size) == 0)
- goto found;
+int volume_id_get_label_raw(struct volume_id *id, const uint8_t **label, size_t *len)
+{
+ if (id == NULL)
+ return -EINVAL;
+ if (label == NULL)
+ return -EINVAL;
+ if (len == NULL)
+ return -EINVAL;
+ if (id->usage_id == VOLUME_ID_UNUSED)
+ return 0;
- if (volume_id_probe_intel_software_raid(id, off, size) == 0)
- goto found;
+ *label = id->label_raw;
+ *len = id->label_raw_len;
+ return 1;
+}
- if (volume_id_probe_lsi_mega_raid(id, off, size) == 0)
- goto found;
+int volume_id_get_uuid(struct volume_id *id, const char **uuid)
+{
+ if (id == NULL)
+ return -EINVAL;
+ if (uuid == NULL)
+ return -EINVAL;
+ if (id->usage_id == VOLUME_ID_UNUSED)
+ return 0;
- if (volume_id_probe_via_raid(id, off, size) == 0)
- goto found;
+ *uuid = id->uuid;
+ return 1;
+}
- if (volume_id_probe_silicon_medley_raid(id, off, size) == 0)
- goto found;
+int volume_id_get_uuid_raw(struct volume_id *id, const uint8_t **uuid, size_t *len)
+{
+ if (id == NULL)
+ return -EINVAL;
+ if (uuid == NULL)
+ return -EINVAL;
+ if (len == NULL)
+ return -EINVAL;
+ if (id->usage_id == VOLUME_ID_UNUSED)
+ return 0;
- if (volume_id_probe_nvidia_raid(id, off, size) == 0)
- goto found;
+ *uuid = id->uuid_raw;
+ *len = id->uuid_raw_len;
+ return 1;
+}
- if (volume_id_probe_promise_fasttrack_raid(id, off, size) == 0)
- goto found;
+int volume_id_get_usage(struct volume_id *id, const char **usage)
+{
+ if (id == NULL)
+ return -EINVAL;
+ if (usage == NULL)
+ return -EINVAL;
+ if (id->usage_id == VOLUME_ID_UNUSED)
+ return 0;
- if (volume_id_probe_highpoint_45x_raid(id, off, size) == 0)
- goto found;
- }
+ *usage = id->usage;
+ return 1;
+}
+
+int volume_id_get_type(struct volume_id *id, const char **type)
+{
+ if (id == NULL)
+ return -EINVAL;
+ if (type == NULL)
+ return -EINVAL;
+ if (id->usage_id == VOLUME_ID_UNUSED)
+ return 0;
+
+ *type = id->type;
+ return 1;
+}
- if (volume_id_probe_lvm1(id, off) == 0)
- goto found;
+int volume_id_get_type_version(struct volume_id *id, const char **type_version)
+{
+ if (id == NULL)
+ return -EINVAL;
+ if (type_version == NULL)
+ return -EINVAL;
+ if (id->usage_id == VOLUME_ID_UNUSED)
+ return 0;
+
+ *type_version = id->type_version;
+ return 1;
+}
+
+int volume_id_probe_raid(struct volume_id *id, uint64_t off, uint64_t size)
+{
+ unsigned int i;
- if (volume_id_probe_lvm2(id, off) == 0)
- goto found;
+ if (id == NULL)
+ return -EINVAL;
- if (volume_id_probe_highpoint_37x_raid(id, off) == 0)
- goto found;
+ info("probing at offset 0x%llx, size 0x%llx",
+ (unsigned long long) off, (unsigned long long) size);
+ for (i = 0; i < ARRAY_SIZE(prober_raid); i++)
+ if (prober_raid[i].prober(id, off, size) == 0)
+ goto found;
return -1;
found:
int volume_id_probe_filesystem(struct volume_id *id, uint64_t off, uint64_t size)
{
+ unsigned int i;
+
if (id == NULL)
return -EINVAL;
info("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size);
- if (volume_id_probe_luks(id, off) == 0)
- goto found;
-
- /* signature in the first block, only small buffer needed */
- if (volume_id_probe_vfat(id, off) == 0)
- goto found;
-
- if (volume_id_probe_xfs(id, off) == 0)
- goto found;
-
- /* fill buffer with maximum */
- volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
-
- if (volume_id_probe_linux_swap(id, off) == 0)
- goto found;
-
- if (volume_id_probe_ext(id, off) == 0)
- goto found;
-
- if (volume_id_probe_reiserfs(id, off) == 0)
- goto found;
-
- if (volume_id_probe_jfs(id, off) == 0)
- goto found;
-
- if (volume_id_probe_udf(id, off) == 0)
- goto found;
-
- if (volume_id_probe_iso9660(id, off) == 0)
- goto found;
-
- if (volume_id_probe_hfs_hfsplus(id, off) == 0)
- goto found;
-
- if (volume_id_probe_ufs(id, off) == 0)
- goto found;
-
- if (volume_id_probe_ntfs(id, off) == 0)
- goto found;
-
- if (volume_id_probe_cramfs(id, off) == 0)
- goto found;
-
- if (volume_id_probe_romfs(id, off) == 0)
- goto found;
-
- if (volume_id_probe_hpfs(id, off) == 0)
- goto found;
-
- if (volume_id_probe_sysv(id, off) == 0)
- goto found;
-
- if (volume_id_probe_minix(id, off) == 0)
- goto found;
-
- if (volume_id_probe_ocfs1(id, off) == 0)
- goto found;
-
- if (volume_id_probe_ocfs2(id, off) == 0)
- goto found;
-
- if (volume_id_probe_vxfs(id, off) == 0)
- goto found;
-
- if (volume_id_probe_squashfs(id, off) == 0)
- goto found;
-
- if (volume_id_probe_netware(id, off) == 0)
- goto found;
-
+ for (i = 0; i < ARRAY_SIZE(prober_filesystem); i++)
+ if (prober_filesystem[i].prober(id, off, size) == 0)
+ goto found;
return -1;
found:
if (id == NULL)
return -EINVAL;
+ /* probe for raid first, because fs probes may be successful on raid members */
if (volume_id_probe_raid(id, off, size) == 0)
return 0;
return -1;
}
+void volume_id_all_probers(all_probers_fn_t all_probers_fn,
+ struct volume_id *id, uint64_t off, uint64_t size,
+ void *data)
+{
+ unsigned int i;
+
+ if (all_probers_fn == NULL)
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(prober_raid); i++)
+ if (all_probers_fn(prober_raid[i].prober, id, off, size, data) != 0)
+ goto out;
+ for (i = 0; i < ARRAY_SIZE(prober_filesystem); i++)
+ if (all_probers_fn(prober_filesystem[i].prober, id, off, size, data) != 0)
+ goto out;
+out:
+ return;
+}
+
/* open volume by already open file descriptor */
struct volume_id *volume_id_open_fd(int fd)
{
~ianmdlvl / elogind.git / blobdiff