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dev-type: dev_is_pmem reuses topology read code

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This commit is contained in:
Zdenek Kabelac 2021-02-07 15:03:13 +01:00
parent 2c597c73a8
commit e429e69b65
3 changed files with 17 additions and 38 deletions
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45
lib/device/dev-type.c
View File

@ -35,39 +35,6 @@
#include <libgen.h>
#include <ctype.h>
/*
* dev is pmem if /sys/dev/block/<major>:<minor>/queue/dax is 1
*/
int dev_is_pmem(struct device *dev)
{
FILE *fp;
char path[PATH_MAX];
int is_pmem = 0;
if (dm_snprintf(path, sizeof(path), "%sdev/block/%d:%d/queue/dax",
dm_sysfs_dir(),
(int) MAJOR(dev->dev),
(int) MINOR(dev->dev)) < 0) {
log_warn("Sysfs path for %s dax is too long.", dev_name(dev));
return 0;
}
if (!(fp = fopen(path, "r")))
return 0;
if (fscanf(fp, "%d", &is_pmem) != 1)
log_warn("Failed to parse DAX %s.", path);
if (is_pmem)
log_debug("%s is pmem", dev_name(dev));
if (fclose(fp))
log_sys_debug("fclose", path);
return is_pmem ? 1 : 0;
}
/*
* An nvme device has major number 259 (BLKEXT), minor number <minor>,
* and reading /sys/dev/block/259:<minor>/device/dev shows a character
@ -1078,6 +1045,13 @@ int dev_is_rotational(struct dev_types *dt, struct device *dev)
{
return (int) _dev_topology_attribute(dt, "queue/rotational", dev, 1UL);
}
/* dev is pmem if /sys/dev/block/<major>:<minor>/queue/dax is 1 */
int dev_is_pmem(struct dev_types *dt, struct device *dev)
{
return (int) _dev_topology_attribute(dt, "queue/dax", dev, 0UL);
}
#else
int dev_get_primary_dev(struct dev_types *dt, struct device *dev, dev_t *result)
@ -1114,6 +1088,11 @@ int dev_is_rotational(struct dev_types *dt, struct device *dev)
{
return 1;
}
int dev_is_pmem(struct dev_types *dt, struct device *dev)
{
return 0;
}
#endif
#ifdef UDEV_SYNC_SUPPORT

2
lib/device/dev-type.h
View File

@ -93,7 +93,7 @@ unsigned long dev_discard_granularity(struct dev_types *dt, struct device *dev);
int dev_is_rotational(struct dev_types *dt, struct device *dev);
int dev_is_pmem(struct device *dev);
int dev_is_pmem(struct dev_types *dt, struct device *dev);
int dev_is_nvme(struct dev_types *dt, struct device *dev);

8
lib/metadata/metadata.c
View File

@ -4436,11 +4436,11 @@ int lv_on_pmem(struct logical_volume *lv)
for (s = 0; s < seg->area_count; s++) {
pv = seg_pv(seg, s);
if (dev_is_pmem(pv->dev)) {
log_debug("LV %s dev %s is pmem.", lv->name, dev_name(pv->dev));
if (dev_is_pmem(lv->vg->cmd->dev_types, pv->dev)) {
log_debug("LV %s dev %s is pmem.", display_lvname(lv), dev_name(pv->dev));
pmem_devs++;
} else {
log_debug("LV %s dev %s not pmem.", lv->name, dev_name(pv->dev));
log_debug("LV %s dev %s not pmem.", display_lvname(lv), dev_name(pv->dev));
other_devs++;
}
}
@ -4452,7 +4452,7 @@ int lv_on_pmem(struct logical_volume *lv)
}
if (pmem_devs) {
log_debug("LV %s on pmem", lv->name);
log_debug("LV %s on pmem", display_lvname(lv));
return 1;
}