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dm ioctl: fill in device parameters in more ioctls 

Move parameter filling from find_device to __find_device_hash_cell.

This patch causes ioctls using __find_device_hash_cell
(DM_DEV_REMOVE_CMD, DM_DEV_SUSPEND_CMD - resume, DM_TABLE_CLEAR_CMD)
to return device parameters, bringing them into line with the other
ioctls.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mikulas Patocka 2011-08-02 12:32:06 +01:00 committed by Alasdair G Kergon
parent a3998799fb
commit 0ddf9644cc
2 changed files with 38 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
drivers/md/dm-ioctl.c
View File

@ -719,24 +719,49 @@ static int dev_create(struct dm_ioctl *param, size_t param_size)
static struct hash_cell *__find_device_hash_cell(struct dm_ioctl *param)
{
struct mapped_device *md;
void *mdptr = NULL;
struct hash_cell *hc = NULL;
if (*param->uuid)
return __get_uuid_cell(param->uuid);
if (*param->uuid) {
hc = __get_uuid_cell(param->uuid);
if (!hc)
return NULL;
goto fill_params;
}
if (*param->name)
return __get_name_cell(param->name);
if (*param->name) {
hc = __get_name_cell(param->name);
if (!hc)
return NULL;
goto fill_params;
}
md = dm_get_md(huge_decode_dev(param->dev));
if (!md)
goto out;
return NULL;
mdptr = dm_get_mdptr(md);
if (!mdptr)
hc = dm_get_mdptr(md);
if (!hc) {
dm_put(md);
return NULL;
}
out:
return mdptr;
fill_params:
/*
* Sneakily write in both the name and the uuid
* while we have the cell.
*/
strlcpy(param->name, hc->name, sizeof(param->name));
if (hc->uuid)
strlcpy(param->uuid, hc->uuid, sizeof(param->uuid));
else
param->uuid[0] = '\0';
if (hc->new_map)
param->flags |= DM_INACTIVE_PRESENT_FLAG;
else
param->flags &= ~DM_INACTIVE_PRESENT_FLAG;
return hc;
}
static struct mapped_device *find_device(struct dm_ioctl *param)
@ -746,24 +771,8 @@ static struct mapped_device *find_device(struct dm_ioctl *param)
down_read(&_hash_lock);
hc = __find_device_hash_cell(param);
if (hc) {
if (hc)
md = hc->md;
/*
* Sneakily write in both the name and the uuid
* while we have the cell.
*/
strlcpy(param->name, hc->name, sizeof(param->name));
if (hc->uuid)
strlcpy(param->uuid, hc->uuid, sizeof(param->uuid));
else
param->uuid[0] = '\0';
if (hc->new_map)
param->flags |= DM_INACTIVE_PRESENT_FLAG;
else
param->flags &= ~DM_INACTIVE_PRESENT_FLAG;
}
up_read(&_hash_lock);
return md;

4
include/linux/dm-ioctl.h
View File

@ -267,9 +267,9 @@ enum {
#define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 4
#define DM_VERSION_MINOR 20
#define DM_VERSION_MINOR 21
#define DM_VERSION_PATCHLEVEL 0
#define DM_VERSION_EXTRA "-ioctl (2011-02-02)"
#define DM_VERSION_EXTRA "-ioctl (2011-07-06)"
/* Status bits */
#define DM_READONLY_FLAG (1 << 0) /* In/Out */