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Userspace support for LIST_VERSIONS ioctl.

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This commit is contained in:
Alasdair Kergon 2004-01-23 14:37:47 +00:00
parent bd094b5d1d
commit cf37d5c7ab
5 changed files with 76 additions and 18 deletions
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1
libdm/.export.sym
View File

@ -12,6 +12,7 @@ Base {
dm_task_get_deps;
dm_task_get_name;
dm_task_get_names;
dm_task_get_versions;
dm_task_get_uuid;
dm_task_set_ro;
dm_task_set_newname;

11
libdm/ioctl/libdevmapper.c
View File

@ -80,6 +80,7 @@ static struct cmd_data _cmd_data_v4[] = {
{"names", DM_LIST_DEVICES, {4, 0, 0}},
{"clear", DM_TABLE_CLEAR, {4, 0, 0}},
{"mknodes", DM_DEV_STATUS, {4, 0, 0}},
{"versions", DM_LIST_VERSIONS, {4, 1, 0}},
};
/* *INDENT-ON* */
@ -384,6 +385,10 @@ static int _dm_names_v1(struct dm_ioctl_v1 *dmi)
struct stat buf;
char path[PATH_MAX];
log_print("Warning: Device list may be incomplete with interface "
"version 1.");
log_print("Please upgrade your kernel device-mapper driver.");
if (!(d = opendir(dev_dir))) {
log_error("%s: opendir failed: %s", dev_dir, strerror(errno));
return 0;
@ -736,6 +741,12 @@ struct dm_names *dm_task_get_names(struct dm_task *dmt)
dmt->dmi.v4->data_start);
}
struct dm_versions *dm_task_get_versions(struct dm_task *dmt)
{
return (struct dm_versions *) (((void *) dmt->dmi.v4) +
dmt->dmi.v4->data_start);
}
int dm_task_set_ro(struct dm_task *dmt)
{
dmt->read_only = 1;

1
libdm/ioctl/libdm-compat.h
View File

@ -105,6 +105,7 @@ static struct cmd_data _cmd_data_v1[] = {
{ "names", 0, {4, 0, 0} },
{ "clear", 0, {4, 0, 0} },
{ "mknodes", 0, {4, 0, 0} },
{ "versions", 0, {4, 1, 0} },
};
/* *INDENT-ON* */

12
libdm/libdevmapper.h
View File

@ -57,7 +57,9 @@ enum {
DM_DEVICE_CLEAR,
DM_DEVICE_MKNODES
DM_DEVICE_MKNODES,
DM_DEVICE_LIST_VERSIONS
};
struct dm_task;
@ -97,6 +99,13 @@ struct dm_names {
char name[0];
};
struct dm_versions {
uint32_t next; /* Offset to next struct from start of this struct */
uint32_t version[3];
char name[0];
};
int dm_get_library_version(char *version, size_t size);
int dm_task_get_driver_version(struct dm_task *dmt, char *version, size_t size);
int dm_task_get_info(struct dm_task *dmt, struct dm_info *dmi);
@ -105,6 +114,7 @@ const char *dm_task_get_uuid(struct dm_task *dmt);
struct dm_deps *dm_task_get_deps(struct dm_task *dmt);
struct dm_names *dm_task_get_names(struct dm_task *dmt);
struct dm_versions *dm_task_get_versions(struct dm_task *dmt);
int dm_task_set_ro(struct dm_task *dmt);
int dm_task_set_newname(struct dm_task *dmt, const char *newname);

37
tools/dmsetup.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
* Copyright (C) 2001-2003 Sistina Software (UK) Limited.
*
* This file is released under the GPL.
*/
@ -462,6 +462,40 @@ static int _status(int argc, char **argv, void *data)
}
/* Show target names and their version numbers */
static int _targets(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
struct dm_versions *target;
struct dm_versions *last_target;
if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
return 0;
if (!dm_task_run(dmt))
goto out;
target = dm_task_get_versions(dmt);
/* Fetch targets and print 'em */
do {
last_target = target;
printf("%-16s v%d.%d.%d\n", target->name, target->version[0],
target->version[1], target->version[2]);
target = (void *) target + target->next;
} while (last_target != target);
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _info(int argc, char **argv, void *data)
{
int r = 0;
@ -611,6 +645,7 @@ static struct command _commands[] = {
{"status", "[<dev_name>]", 0, 1, _status},
{"table", "[<dev_name>]", 0, 1, _status},
{"wait", "<dev_name> [<event_nr>]", 1, 2, _wait},
{"targets", "", 0, 0, _targets},
{"version", "", 0, 0, _version},
{NULL, NULL, 0, 0, NULL}
};