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dev_manager: use setup_task_run for mknod

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Simplify info run for use only for INFO & STATUS.
Drop handling MKNODES within _info_run() call
and use more advanced _setup_task_run() directly.

This allows to further simplify _info_run().
This commit is contained in:
Zdenek Kabelac 2016-12-02 13:46:47 +01:00
parent 5163b8f697
commit 114f7e6285
2 changed files with 18 additions and 19 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.169 -
=====================================
Simplify internal _info_run() and use _setup_task_run() for mknod.
Better API for internal function _setup_task_run.
Avoid using lv_has_target_type() call within lv_info_with_seg_status.
Simplify internal lv_info_with_seg_status API.

36
lib/activate/dev_manager.c
View File

@ -211,10 +211,9 @@ static int _get_segment_status_from_target_params(const char *target_name,
typedef enum {
INFO, /* DM_DEVICE_INFO ioctl */
STATUS, /* DM_DEVICE_STATUS ioctl */
MKNODES
} info_type_t;
static int _info_run(info_type_t type, const char *name, const char *dlid,
static int _info_run(info_type_t type, const char *dlid,
struct dm_info *dminfo, uint32_t *read_ahead,
struct lv_seg_status *seg_status,
int with_open_count, int with_read_ahead,
@ -236,17 +235,13 @@ static int _info_run(info_type_t type, const char *name, const char *dlid,
dmtask = DM_DEVICE_STATUS;
with_flush = 0;
break;
case MKNODES:
dmtask = DM_DEVICE_MKNODES;
break;
default:
log_error(INTERNAL_ERROR "_info_run: unhandled info type");
return 0;
}
if (!(dmt = _setup_task_run(dmtask, dminfo,
(type == MKNODES) ? name : NULL, dlid, 0,
major, minor, with_open_count, with_flush, 0)))
NULL, dlid, 0, major, minor, with_open_count, with_flush, 0)))
return_0;
if (with_read_ahead && dminfo->exists) {
@ -686,7 +681,7 @@ static int _info(struct cmd_context *cmd, const char *dlid, int with_open_count,
unsigned i = 0;
/* Check for dlid */
if ((r = _info_run(seg_status ? STATUS : INFO, NULL, dlid, dminfo, read_ahead,
if ((r = _info_run(seg_status ? STATUS : INFO, dlid, dminfo, read_ahead,
seg_status, with_open_count, with_read_ahead, 0, 0)) && dminfo->exists)
return 1;
@ -698,7 +693,7 @@ static int _info(struct cmd_context *cmd, const char *dlid, int with_open_count,
(void) strncpy(old_style_dlid, dlid, sizeof(old_style_dlid));
old_style_dlid[sizeof(old_style_dlid) - 1] = '\0';
if ((r = _info_run(seg_status ? STATUS : INFO, NULL, old_style_dlid, dminfo,
if ((r = _info_run(seg_status ? STATUS : INFO, old_style_dlid, dminfo,
read_ahead, seg_status, with_open_count,
with_read_ahead, 0, 0)) && dminfo->exists)
return 1;
@ -710,7 +705,7 @@ static int _info(struct cmd_context *cmd, const char *dlid, int with_open_count,
return r;
/* Check for dlid before UUID_PREFIX was added */
if ((r = _info_run(seg_status ? STATUS : INFO, NULL, dlid + sizeof(UUID_PREFIX) - 1,
if ((r = _info_run(seg_status ? STATUS : INFO, dlid + sizeof(UUID_PREFIX) - 1,
dminfo, read_ahead, seg_status, with_open_count,
with_read_ahead, 0, 0)) && dminfo->exists)
return 1;
@ -720,7 +715,7 @@ static int _info(struct cmd_context *cmd, const char *dlid, int with_open_count,
static int _info_by_dev(uint32_t major, uint32_t minor, struct dm_info *info)
{
return _info_run(INFO, NULL, NULL, info, NULL, 0, 0, 0, major, minor);
return _info_run(INFO, NULL, info, NULL, 0, 0, 0, major, minor);
}
int dev_manager_info(struct cmd_context *cmd, const struct logical_volume *lv,
@ -1561,21 +1556,24 @@ static int _lv_has_mknode(const struct logical_volume *lv)
int dev_manager_mknodes(const struct logical_volume *lv)
{
struct dm_info dminfo;
struct dm_task *dmt;
char *name;
int r = 0;
if (!(name = dm_build_dm_name(lv->vg->cmd->mem, lv->vg->name, lv->name, NULL)))
return_0;
if ((r = _info_run(MKNODES, name, NULL, &dminfo, NULL, NULL, 0, 0, 0, 0))) {
if (dminfo.exists) {
if (_lv_has_mknode(lv))
r = _dev_manager_lv_mknodes(lv);
} else
r = _dev_manager_lv_rmnodes(lv);
}
if (!(dmt = _setup_task_run(DM_DEVICE_MKNODES, &dminfo, name, NULL, 0, 0, 0, 0, 0, 0)))
return_0;
if (dminfo.exists) {
if (_lv_has_mknode(lv))
r = _dev_manager_lv_mknodes(lv);
} else
r = _dev_manager_lv_rmnodes(lv);
dm_task_destroy(dmt);
dm_pool_free(lv->vg->cmd->mem, name);
return r;
}