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Add splitname.

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This commit is contained in:
Alasdair Kergon 2009-06-03 20:44:42 +00:00
parent 9767eb448d
commit 896fc66e32
2 changed files with 33 additions and 5 deletions
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1
WHATS_NEW_DM
View File

@ -1,5 +1,6 @@
Version 1.02.33 -
===============================
Add splitname command to dmsetup.
Add subsystem, vg_name, lv_name, lv_layer fields to dmsetup reports.
Make mempool optional in dm_split_lvm_name().

37
tools/dmsetup.c
View File

@ -303,14 +303,14 @@ static struct dm_task *_get_deps_task(int major, int minor)
return NULL;
}
static char *_extract_uuid_prefix(const char *uuid)
static char *_extract_uuid_prefix(const char *uuid, const int separator)
{
char *ptr = NULL;
char *uuid_prefix = NULL;
size_t len;
if (uuid)
ptr = strchr(uuid, '-');
ptr = strchr(uuid, separator);
len = ptr ? ptr - uuid : 0;
if (!(uuid_prefix = dm_malloc(len + 1))) {
@ -324,7 +324,8 @@ static char *_extract_uuid_prefix(const char *uuid)
return uuid_prefix;
}
static struct dm_split_name *_get_split_name(const char *uuid, const char *name)
static struct dm_split_name *_get_split_name(const char *uuid, const char *name,
int separator)
{
struct dm_split_name *split_name;
@ -334,7 +335,7 @@ static struct dm_split_name *_get_split_name(const char *uuid, const char *name)
return NULL;
}
split_name->subsystem = _extract_uuid_prefix(uuid);
split_name->subsystem = _extract_uuid_prefix(uuid, separator);
split_name->vg_name = split_name->lv_name =
split_name->lv_layer = (char *) "";
@ -383,7 +384,7 @@ static int _display_info_cols(struct dm_task *dmt, struct dm_info *info)
obj.deps_task = _get_deps_task(info->major, info->minor);
if (_report_type & DR_NAME)
obj.split_name = _get_split_name(dm_task_get_uuid(dmt), dm_task_get_name(dmt));
obj.split_name = _get_split_name(dm_task_get_uuid(dmt), dm_task_get_name(dmt), '-');
if (!dm_report_object(_report, &obj))
goto out;
@ -721,6 +722,24 @@ static int _setgeometry(int argc, char **argv, void *data __attribute((unused)))
return r;
}
static int _splitname(int argc, char **argv, void *data __attribute((unused)))
{
struct dmsetup_report_obj obj;
int r = 1;
obj.task = NULL;
obj.info = NULL;
obj.deps_task = NULL;
obj.tree_node = NULL;
obj.split_name = _get_split_name((argc == 3) ? argv[2] : "LVM",
argv[1], '\0');
r = dm_report_object(_report, &obj);
_destroy_split_name(obj.split_name);
return r;
}
static int _version(int argc __attribute((unused)), char **argv __attribute((unused)), void *data __attribute((unused)))
{
char version[80];
@ -2090,6 +2109,7 @@ FIELD_O(NAME, dm_split_name, STR, "LVLayer", lv_layer, 7, dm_lv_layer_name, "lv_
#undef FIELD_F
static const char *default_report_options = "name,major,minor,attr,open,segments,events,uuid";
static const char *splitname_report_options = "vg_name,lv_name,lv_layer";
static int _report_init(struct command *c)
{
@ -2102,6 +2122,9 @@ static int _report_init(struct command *c)
size_t len = 0;
int r = 0;
if (!strcmp(c->name, "splitname"))
options = (char *) splitname_report_options;
/* emulate old dmsetup behaviour */
if (_switches[NOHEADINGS_ARG]) {
separator = ":";
@ -2241,6 +2264,7 @@ static struct command _commands[] = {
{"targets", "", 0, 0, _targets},
{"version", "", 0, 0, _version},
{"setgeometry", "<device> <cyl> <head> <sect> <start>", 5, 5, _setgeometry},
{"splitname", "<device> [<subsystem>]", 1, 2, _splitname},
{NULL, NULL, 0, 0, NULL}
};
@ -2858,6 +2882,9 @@ int main(int argc, char **argv)
goto out;
}
if (!_switches[COLS_ARG] && !strcmp(c->name, "splitname"))
_switches[COLS_ARG]++;
if (_switches[COLS_ARG] && !_report_init(c))
goto out;