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Add DEV_NAME macro.

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Use the DEV_NAME macro to use the mangled form of the name if present,
use normal name otherwise (we store both forms - mangled and unmangled in
struct dm_task). Mangled form should be always preferred over unmangled
with the exception of the situations where we divide one task into several
others (like "create and load") - we need to avoid mangling the name twice
(because of multiple dm_task_set_name calls)!
This commit is contained in:
Peter Rajnoha 2012-02-15 11:33:53 +00:00
parent 55761e14af
commit 2e8c7f2975
2 changed files with 21 additions and 20 deletions
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39
libdm/ioctl/libdm-iface.c
View File

@ -664,9 +664,7 @@ uint32_t dm_task_get_read_ahead(const struct dm_task *dmt, uint32_t *read_ahead)
if (*dmt->dmi.v4->name)
dev_name = dmt->dmi.v4->name;
else if (dmt->dev_name)
dev_name = dmt->dev_name;
else {
else if (!(dev_name = DEV_NAME(dmt))) {
log_error("Get read ahead request failed: device name unrecorded.");
return 0;
}
@ -1041,7 +1039,7 @@ static struct dm_ioctl *_flatten(struct dm_task *dmt, unsigned repeat_count)
}
/* Does driver support device number referencing? */
if (_dm_version_minor < 3 && !dmt->dev_name && !dmt->uuid && dmi->dev) {
if (_dm_version_minor < 3 && !DEV_NAME(dmt) && !dmt->uuid && dmi->dev) {
if (!_lookup_dev_name(dmi->dev, dmi->name, sizeof(dmi->name))) {
log_error("Unable to find name for device (%" PRIu32
":%" PRIu32 ")", dmt->major, dmt->minor);
@ -1053,9 +1051,9 @@ static struct dm_ioctl *_flatten(struct dm_task *dmt, unsigned repeat_count)
}
/* FIXME Until resume ioctl supplies name, use dev_name for readahead */
if (dmt->dev_name && (dmt->type != DM_DEVICE_RESUME || dmt->minor < 0 ||
if (DEV_NAME(dmt) && (dmt->type != DM_DEVICE_RESUME || dmt->minor < 0 ||
dmt->major < 0))
strncpy(dmi->name, dmt->dev_name, sizeof(dmi->name));
strncpy(dmi->name, DEV_NAME(dmt), sizeof(dmi->name));
if (dmt->uuid)
strncpy(dmi->uuid, dmt->uuid, sizeof(dmi->uuid));
@ -1464,7 +1462,7 @@ static int _check_children_not_suspended_v4(struct dm_task *dmt, uint64_t device
else
log_error(INTERNAL_ERROR "Attempt to suspend device %s%s%s%.0d%s%.0d%s%s"
"that uses already-suspended device (%u:%u)",
dmt->dev_name ? : "", dmt->uuid ? : "",
DEV_NAME(dmt) ? : "", dmt->uuid ? : "",
dmt->major > 0 ? "(" : "",
dmt->major > 0 ? dmt->major : 0,
dmt->major > 0 ? ":" : "",
@ -1675,6 +1673,7 @@ int dm_task_run(struct dm_task *dmt)
int suspended_counter;
unsigned ioctl_retry = 1;
int retryable = 0;
const char *dev_name = DEV_NAME(dmt);
if ((unsigned) dmt->type >=
(sizeof(_cmd_data_v4) / sizeof(*_cmd_data_v4))) {
@ -1689,7 +1688,7 @@ int dm_task_run(struct dm_task *dmt)
if (dmt->type == DM_DEVICE_CREATE && dmt->head)
return _create_and_load_v4(dmt);
if (dmt->type == DM_DEVICE_MKNODES && !dmt->dev_name &&
if (dmt->type == DM_DEVICE_MKNODES && !dev_name &&
!dmt->uuid && dmt->major <= 0)
return _mknodes_v4(dmt);
@ -1710,7 +1709,7 @@ int dm_task_run(struct dm_task *dmt)
"are known to be suspended: "
"%s%s%s %s%.0d%s%.0d%s%s",
suspended_counter,
dmt->dev_name ? : "",
dev_name ? : "",
dmt->uuid ? " UUID " : "",
dmt->uuid ? : "",
dmt->major > 0 ? "(" : "",
@ -1769,32 +1768,32 @@ repeat_ioctl:
switch (dmt->type) {
case DM_DEVICE_CREATE:
if ((dmt->add_node == DM_ADD_NODE_ON_CREATE) &&
dmt->dev_name && *dmt->dev_name && !rely_on_udev)
add_dev_node(dmt->dev_name, MAJOR(dmi->dev),
dev_name && *dev_name && !rely_on_udev)
add_dev_node(dev_name, MAJOR(dmi->dev),
MINOR(dmi->dev), dmt->uid, dmt->gid,
dmt->mode, check_udev, rely_on_udev);
break;
case DM_DEVICE_REMOVE:
/* FIXME Kernel needs to fill in dmi->name */
if (dmt->dev_name && !rely_on_udev)
rm_dev_node(dmt->dev_name, check_udev, rely_on_udev);
if (dev_name && !rely_on_udev)
rm_dev_node(dev_name, check_udev, rely_on_udev);
break;
case DM_DEVICE_RENAME:
/* FIXME Kernel needs to fill in dmi->name */
if (!dmt->new_uuid && dmt->dev_name)
rename_dev_node(dmt->dev_name, dmt->newname,
if (!dmt->new_uuid && dev_name)
rename_dev_node(dev_name, dmt->newname,
check_udev, rely_on_udev);
break;
case DM_DEVICE_RESUME:
if ((dmt->add_node == DM_ADD_NODE_ON_RESUME) &&
dmt->dev_name && *dmt->dev_name)
add_dev_node(dmt->dev_name, MAJOR(dmi->dev),
dev_name && *dev_name)
add_dev_node(dev_name, MAJOR(dmi->dev),
MINOR(dmi->dev), dmt->uid, dmt->gid,
dmt->mode, check_udev, rely_on_udev);
/* FIXME Kernel needs to fill in dmi->name */
set_dev_node_read_ahead(dmt->dev_name,
set_dev_node_read_ahead(dev_name,
MAJOR(dmi->dev), MINOR(dmi->dev),
dmt->read_ahead, dmt->read_ahead_flags);
break;
@ -1804,8 +1803,8 @@ repeat_ioctl:
add_dev_node(dmi->name, MAJOR(dmi->dev),
MINOR(dmi->dev), dmt->uid,
dmt->gid, dmt->mode, 0, rely_on_udev);
else if (dmt->dev_name)
rm_dev_node(dmt->dev_name, 0, rely_on_udev);
else if (dev_name)
rm_dev_node(dev_name, 0, rely_on_udev);
break;
case DM_DEVICE_STATUS:

2
libdm/libdm-common.h
View File

@ -18,6 +18,8 @@
#include "libdevmapper.h"
#define DEV_NAME(dmt) (dmt->mangled_dev_name ? : dmt->dev_name)
int mangle_name(const char *str, size_t len, char *buf,
size_t buf_len, dm_string_mangling_t mode);