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Code

volume_id: give access to list of all available probers

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This commit is contained in:
Kay Sievers 2007-05-08 19:59:23 +02:00
parent 1b679f0a8b
commit c1091150be
3 changed files with 128 additions and 137 deletions
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7
extras/volume_id/lib/exported_symbols
View File

@ -10,11 +10,14 @@
volume_id_get_type_version; volume_id_get_type_version;
volume_id_open_fd; volume_id_open_fd;
volume_id_open_node; volume_id_close;
volume_id_probe_all; volume_id_probe_all;
volume_id_probe_filesystem; volume_id_probe_filesystem;
volume_id_probe_raid; volume_id_probe_raid;
volume_id_close; volume_id_all_probers;
volume_id_get_prober_by_type;
volume_id_open_node;
volume_id_probe_linux_swap; volume_id_probe_linux_swap;
volume_id_probe_luks; volume_id_probe_luks;

46
extras/volume_id/lib/libvolume_id.h
View File

@ -16,9 +16,38 @@
typedef void (*volume_id_log_fn_t)(int priority, const char *file, int line, const char *format, ...) typedef void (*volume_id_log_fn_t)(int priority, const char *file, int line, const char *format, ...)
__attribute__ ((format(printf, 4, 5))); __attribute__ ((format(printf, 4, 5)));
extern volume_id_log_fn_t volume_id_log_fn; extern volume_id_log_fn_t volume_id_log_fn;
struct volume_id;
typedef int (*volume_id_probe_fn_t)(struct volume_id *id, uint64_t off, uint64_t size);
typedef int (*all_probers_fn_t)(volume_id_probe_fn_t probe_fn,
struct volume_id *id, uint64_t off, uint64_t size,
void *data);
extern struct volume_id *volume_id_open_fd(int fd);
extern void volume_id_close(struct volume_id *id);
extern int volume_id_probe_filesystem(struct volume_id *id, uint64_t off, uint64_t size);
extern int volume_id_probe_raid(struct volume_id *id, uint64_t off, uint64_t size);
extern int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size);
extern const volume_id_probe_fn_t *volume_id_get_prober_by_type(const char *type);
extern void volume_id_all_probers(all_probers_fn_t all_probers_fn,
struct volume_id *id, uint64_t off, uint64_t size,
void *data);
extern int volume_id_get_label(struct volume_id *id, const char **label);
extern int volume_id_get_label_raw(struct volume_id *id, const uint8_t **label, size_t *len);
extern int volume_id_get_uuid(struct volume_id *id, const char **uuid);
extern int volume_id_get_uuid_raw(struct volume_id *id, const uint8_t **uuid, size_t *len);
extern int volume_id_get_usage(struct volume_id *id, const char **usage);
extern int volume_id_get_type(struct volume_id *id, const char **type);
extern int volume_id_get_type_version(struct volume_id *id, const char **type_version);
/*
* Note: everything below will be made private or removed from
* a future version, and a new major release of libvolume_id
*/
extern struct volume_id *volume_id_open_node(const char *path);
#define VOLUME_ID_LABEL_SIZE 64 #define VOLUME_ID_LABEL_SIZE 64
#define VOLUME_ID_UUID_SIZE 36 #define VOLUME_ID_UUID_SIZE 36
#define VOLUME_ID_FORMAT_SIZE 32 #define VOLUME_ID_FORMAT_SIZE 32
@ -56,21 +85,6 @@ struct volume_id {
int fd_close:1; int fd_close:1;
}; };
extern int volume_id_get_label(struct volume_id *id, const char **label);
extern int volume_id_get_label_raw(struct volume_id *id, const uint8_t **label, size_t *len);
extern int volume_id_get_uuid(struct volume_id *id, const char **uuid);
extern int volume_id_get_uuid_raw(struct volume_id *id, const uint8_t **uuid, size_t *len);
extern int volume_id_get_usage(struct volume_id *id, const char **usage);
extern int volume_id_get_type(struct volume_id *id, const char **type);
extern int volume_id_get_type_version(struct volume_id *id, const char **type_version);
extern struct volume_id *volume_id_open_fd(int fd);
extern struct volume_id *volume_id_open_node(const char *path);
extern int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size);
extern int volume_id_probe_filesystem(struct volume_id *id, uint64_t off, uint64_t size);
extern int volume_id_probe_raid(struct volume_id *id, uint64_t off, uint64_t size);
extern void volume_id_close(struct volume_id *id);
/* filesystems */ /* filesystems */
extern int volume_id_probe_cramfs(struct volume_id *id, uint64_t off, uint64_t size); extern int volume_id_probe_cramfs(struct volume_id *id, uint64_t off, uint64_t size);
extern int volume_id_probe_ext(struct volume_id *id, uint64_t off, uint64_t size); extern int volume_id_probe_ext(struct volume_id *id, uint64_t off, uint64_t size);

210
extras/volume_id/lib/volume_id.c
View File

@ -28,6 +28,57 @@
#include "libvolume_id.h" #include "libvolume_id.h"
#include "util.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 */ /* the user can overwrite this log function */
static void default_log(int priority, const char *file, int line, const char *format, ...) static void default_log(int priority, const char *file, int line, const char *format, ...)
{ {
@ -36,6 +87,19 @@ static void default_log(int priority, const char *file, int line, const char *fo
volume_id_log_fn_t volume_id_log_fn = default_log; volume_id_log_fn_t volume_id_log_fn = default_log;
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) int volume_id_get_label(struct volume_id *id, const char **label)
{ {
if (id == NULL) if (id == NULL)
@ -135,57 +199,17 @@ int volume_id_get_type_version(struct volume_id *id, const char **type_version)
int volume_id_probe_raid(struct volume_id *id, uint64_t off, uint64_t size) int volume_id_probe_raid(struct volume_id *id, uint64_t off, uint64_t size)
{ {
unsigned int i;
if (id == NULL) if (id == NULL)
return -EINVAL; return -EINVAL;
info("probing at offset 0x%llx, size 0x%llx", info("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size); (unsigned long long) off, (unsigned long long) size);
/* probe for raid first, because fs probes may be successful on raid members */ for (i = 0; i < ARRAY_SIZE(prober_raid); i++)
if (size) { if (prober_raid[i].prober(id, off, size) == 0)
if (volume_id_probe_linux_raid(id, off, size) == 0)
goto found; goto found;
if (volume_id_probe_ddf_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_intel_software_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_lsi_mega_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_via_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_silicon_medley_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_nvidia_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_promise_fasttrack_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_highpoint_45x_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_adaptec_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_jmicron_raid(id, off, size) == 0)
goto found;
}
if (volume_id_probe_lvm1(id, off, size) == 0)
goto found;
if (volume_id_probe_lvm2(id, off, size) == 0)
goto found;
if (volume_id_probe_highpoint_37x_raid(id, off, size) == 0)
goto found;
return -1; return -1;
found: found:
@ -196,87 +220,17 @@ found:
int volume_id_probe_filesystem(struct volume_id *id, uint64_t off, uint64_t size) int volume_id_probe_filesystem(struct volume_id *id, uint64_t off, uint64_t size)
{ {
unsigned int i;
if (id == NULL) if (id == NULL)
return -EINVAL; return -EINVAL;
info("probing at offset 0x%llx, size 0x%llx", info("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size); (unsigned long long) off, (unsigned long long) size);
if (volume_id_probe_vfat(id, off, size) == 0) for (i = 0; i < ARRAY_SIZE(prober_filesystem); i++)
if (prober_filesystem[i].prober(id, off, size) == 0)
goto found; goto found;
/* fill buffer with maximum */
volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
if (volume_id_probe_linux_swap(id, off, size) == 0)
goto found;
if (volume_id_probe_luks(id, off, size) == 0)
goto found;
if (volume_id_probe_xfs(id, off, size) == 0)
goto found;
if (volume_id_probe_ext(id, off, size) == 0)
goto found;
if (volume_id_probe_reiserfs(id, off, size) == 0)
goto found;
if (volume_id_probe_jfs(id, off, size) == 0)
goto found;
if (volume_id_probe_udf(id, off, size) == 0)
goto found;
if (volume_id_probe_iso9660(id, off, size) == 0)
goto found;
if (volume_id_probe_hfs_hfsplus(id, off, size) == 0)
goto found;
if (volume_id_probe_ufs(id, off, size) == 0)
goto found;
if (volume_id_probe_ntfs(id, off, size) == 0)
goto found;
if (volume_id_probe_cramfs(id, off, size) == 0)
goto found;
if (volume_id_probe_romfs(id, off, size) == 0)
goto found;
if (volume_id_probe_hpfs(id, off, size) == 0)
goto found;
if (volume_id_probe_sysv(id, off, size) == 0)
goto found;
if (volume_id_probe_minix(id, off, size) == 0)
goto found;
if (volume_id_probe_ocfs1(id, off, size) == 0)
goto found;
if (volume_id_probe_ocfs2(id, off, size) == 0)
goto found;
if (volume_id_probe_vxfs(id, off, size) == 0)
goto found;
if (volume_id_probe_squashfs(id, off, size) == 0)
goto found;
if (volume_id_probe_netware(id, off, size) == 0)
goto found;
if (volume_id_probe_gfs(id, off, size) == 0)
goto found;
if (volume_id_probe_gfs2(id, off, size) == 0)
goto found;
return -1; return -1;
found: found:
@ -290,6 +244,7 @@ int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size)
if (id == NULL) if (id == NULL)
return -EINVAL; return -EINVAL;
/* probe for raid first, because fs probes may be successful on raid members */
if (volume_id_probe_raid(id, off, size) == 0) if (volume_id_probe_raid(id, off, size) == 0)
return 0; return 0;
@ -299,6 +254,25 @@ int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size)
return -1; 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 */ /* open volume by already open file descriptor */
struct volume_id *volume_id_open_fd(int fd) struct volume_id *volume_id_open_fd(int fd)
{ {