List targets ioctl. [Patrick Caulfield]
--- diff/drivers/md/dm-failure.c 2003-11-26 10:21:14.000000000 +0000
+++ source/drivers/md/dm-failure.c 2003-12-04 11:18:37.000000000 +0000
@@ -594,6 +594,7 @@
static struct target_type failure_target = {
.name = "failure",
+ .version = {1, 0, 1},
.module = THIS_MODULE,
.ctr = failure_ctr,
.dtr = failure_dtr,
--- diff/drivers/md/dm-flakey.c 2003-11-26 10:21:14.000000000 +0000
+++ source/drivers/md/dm-flakey.c 2003-12-04 11:18:37.000000000 +0000
@@ -121,6 +121,7 @@
static struct target_type flakey_target = {
.name = "flakey",
+ .version= {1, 0, 1},
.module = THIS_MODULE,
.ctr = flakey_ctr,
.dtr = flakey_dtr,
--- diff/drivers/md/dm-ioctl-v4.c 2003-11-26 10:09:05.000000000 +0000
+++ source/drivers/md/dm-ioctl-v4.c 2003-12-04 11:14:03.000000000 +0000
@@ -33,6 +33,14 @@
struct dm_table *new_map;
};
+struct vers_iter {
+ size_t param_size;
+ struct dm_target_versions *vers, *old_vers;
+ char *end;
+ uint32_t flags;
+};
+
+
#define NUM_BUCKETS 64
#define MASK_BUCKETS (NUM_BUCKETS - 1)
static struct list_head _name_buckets[NUM_BUCKETS];
@@ -415,6 +423,80 @@
return 0;
}
+static void list_version_get_needed(struct target_type *tt, void *param)
+{
+ int *needed = param;
+
+ *needed += strlen(tt->name);
+ *needed += sizeof(tt->version);
+ *needed += ALIGN_MASK;
+}
+
+static void list_version_get_info(struct target_type *tt, void *param)
+{
+ struct vers_iter *info = param;
+
+ /* Check space - it might have changed since the first iteration */
+ if ((char *)info->vers + sizeof(tt->version) + strlen(tt->name) + 1 >
+ info->end) {
+
+ info->flags = DM_BUFFER_FULL_FLAG;
+ return;
+ }
+
+ if (info->old_vers)
+ info->old_vers->next = (uint32_t) ((void *)info->vers -
+ (void *)info->old_vers);
+ info->vers->version[0] = tt->version[0];
+ info->vers->version[1] = tt->version[1];
+ info->vers->version[2] = tt->version[2];
+ info->vers->next = 0;
+ strcpy(info->vers->name, tt->name);
+
+ info->old_vers = info->vers;
+ info->vers = align_ptr(((void *) ++info->vers) + strlen(tt->name) + 1);
+}
+
+static int list_versions(struct dm_ioctl *param, size_t param_size)
+{
+ size_t len, needed = 0;
+ struct dm_target_versions *vers;
+ struct vers_iter iter_info;
+
+ /*
+ * Loop through all the devices working out how much
+ * space we need.
+ */
+ dm_target_iterate(list_version_get_needed, &needed);
+
+ /*
+ * Grab our output buffer.
+ */
+ vers = get_result_buffer(param, param_size, &len);
+ if (len < needed) {
+ param->flags |= DM_BUFFER_FULL_FLAG;
+ goto out;
+ }
+ param->data_size = param->data_start + needed;
+
+ iter_info.param_size = param_size;
+ iter_info.old_vers = NULL;
+ iter_info.vers = vers;
+ iter_info.flags = 0;
+ iter_info.end = (char *)vers+len;
+
+ /*
+ * Now loop through filling out the names & versions.
+ */
+ dm_target_iterate(list_version_get_info, &iter_info);
+ param->flags |= iter_info.flags;
+
+ out:
+ return 0;
+}
+
+
+
static int check_name(const char *name)
{
if (strchr(name, '/')) {
@@ -1045,7 +1127,9 @@
{DM_TABLE_LOAD_CMD, table_load},
{DM_TABLE_CLEAR_CMD, table_clear},
{DM_TABLE_DEPS_CMD, table_deps},
- {DM_TABLE_STATUS_CMD, table_status}
+ {DM_TABLE_STATUS_CMD, table_status},
+
+ {DM_LIST_VERSIONS_CMD, list_versions}
};
return (cmd >= ARRAY_SIZE(_ioctls)) ? NULL : _ioctls[cmd].fn;
--- diff/drivers/md/dm-linear.c 2003-11-26 10:18:32.000000000 +0000
+++ source/drivers/md/dm-linear.c 2003-12-04 11:18:37.000000000 +0000
@@ -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.
*/
@@ -97,6 +97,7 @@
static struct target_type linear_target = {
.name = "linear",
+ .version= {1, 0, 1},
.module = THIS_MODULE,
.ctr = linear_ctr,
.dtr = linear_dtr,
--- diff/drivers/md/dm-mpath.c 2003-12-04 11:14:13.000000000 +0000
+++ source/drivers/md/dm-mpath.c 2003-12-04 11:24:50.000000000 +0000
@@ -627,6 +627,7 @@
*---------------------------------------------------------------*/
static struct target_type multipath_target = {
.name = "multipath",
+ .version = {1, 0, 1},
.module = THIS_MODULE,
.ctr = multipath_ctr,
.dtr = multipath_dtr,
--- diff/drivers/md/dm-raid1.c 2003-11-26 10:21:02.000000000 +0000
+++ source/drivers/md/dm-raid1.c 2003-12-04 11:18:37.000000000 +0000
@@ -1247,6 +1247,7 @@
static struct target_type mirror_target = {
.name = "mirror",
+ .version = {1, 0, 1},
.module = THIS_MODULE,
.ctr = mirror_ctr,
.dtr = mirror_dtr,
--- diff/drivers/md/dm-snap.c 2003-11-26 10:20:28.000000000 +0000
+++ source/drivers/md/dm-snap.c 2003-12-04 11:18:37.000000000 +0000
@@ -1184,6 +1184,7 @@
static struct target_type origin_target = {
name: "snapshot-origin",
+ version: {1, 0, 1},
module: THIS_MODULE,
ctr: origin_ctr,
dtr: origin_dtr,
@@ -1194,6 +1195,7 @@
static struct target_type snapshot_target = {
name: "snapshot",
+ version: {1, 0, 1},
module: THIS_MODULE,
ctr: snapshot_ctr,
dtr: snapshot_dtr,
--- diff/drivers/md/dm-stripe.c 2003-11-26 10:18:32.000000000 +0000
+++ source/drivers/md/dm-stripe.c 2003-12-04 11:18:22.000000000 +0000
@@ -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.
*/
@@ -212,6 +212,7 @@
static struct target_type stripe_target = {
.name = "striped",
+ .version= {1, 0, 1},
.module = THIS_MODULE,
.ctr = stripe_ctr,
.dtr = stripe_dtr,
--- diff/drivers/md/dm-target.c 2003-11-26 10:18:32.000000000 +0000
+++ source/drivers/md/dm-target.c 2003-12-04 11:33:07.000000000 +0000
@@ -100,6 +100,20 @@
return ti;
}
+
+int dm_target_iterate(void (*iter_func)(struct target_type *tt,
+ void *param), void *param)
+{
+ struct tt_internal *ti;
+
+ down_read(&_lock);
+ list_for_each_entry (ti, &_targets, list)
+ iter_func(&ti->tt, param);
+ up_read(&_lock);
+
+ return 0;
+}
+
int dm_register_target(struct target_type *t)
{
int rv = 0;
@@ -165,6 +179,7 @@
static struct target_type error_target = {
.name = "error",
+ .version = {1, 0, 1},
.ctr = io_err_ctr,
.dtr = io_err_dtr,
.map = io_err_map,
--- diff/drivers/md/dm.h 2003-12-04 11:14:13.000000000 +0000
+++ source/drivers/md/dm.h 2003-12-04 11:14:03.000000000 +0000
@@ -147,6 +147,8 @@
void dm_target_exit(void);
struct target_type *dm_get_target_type(const char *name);
void dm_put_target_type(struct target_type *t);
+int dm_target_iterate(void (*iter_func)(struct target_type *tt,
+ void *param), void *param);
/*-----------------------------------------------------------------
* Useful inlines.
--- diff/include/linux/device-mapper.h 2003-11-26 10:18:32.000000000 +0000
+++ source/include/linux/device-mapper.h 2003-12-04 11:15:40.000000000 +0000
@@ -74,6 +74,7 @@
struct target_type {
const char *name;
struct module *module;
+ unsigned version[3];
dm_ctr_fn ctr;
dm_dtr_fn dtr;
dm_map_fn map;
@@ -104,7 +105,7 @@
sector_t split_io;
/*
- * These are automaticall filled in by
+ * These are automatically filled in by
* dm_table_get_device.
*/
struct io_restrictions limits;
--- diff/include/linux/dm-ioctl-v4.h 2003-08-20 14:16:15.000000000 +0100
+++ source/include/linux/dm-ioctl-v4.h 2003-12-04 11:14:03.000000000 +0000
@@ -163,6 +163,16 @@
};
/*
+ * Used to retrieve the target versions
+ */
+struct dm_target_versions {
+ uint32_t next;
+ uint32_t version[3];
+
+ char name[0];
+};
+
+/*
* If you change this make sure you make the corresponding change
* to dm-ioctl.c:lookup_ioctl()
*/
@@ -185,6 +195,9 @@
DM_TABLE_CLEAR_CMD,
DM_TABLE_DEPS_CMD,
DM_TABLE_STATUS_CMD,
+
+ /* Added later */
+ DM_LIST_VERSIONS_CMD,
};
#define DM_IOCTL 0xfd
@@ -205,6 +218,8 @@
#define DM_TABLE_DEPS _IOWR(DM_IOCTL, DM_TABLE_DEPS_CMD, struct dm_ioctl)
#define DM_TABLE_STATUS _IOWR(DM_IOCTL, DM_TABLE_STATUS_CMD, struct dm_ioctl)
+#define DM_LIST_VERSIONS _IOWR(DM_IOCTL, DM_LIST_VERSIONS_CMD, struct dm_ioctl)
+
#define DM_VERSION_MAJOR 4
#define DM_VERSION_MINOR 0
#define DM_VERSION_PATCHLEVEL 0