shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2025-01-03 05:18:29 +03:00
Code Releases Activity

vdo: discard reduced area

Browse Source 
Implement sending discard to reduced LV area.
This commit is contained in:
Zdenek Kabelac 2019-01-21 12:20:07 +01:00
parent ca72d19691
commit f1ad4b0679
1 changed files with 37 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
lib/metadata/lv_manip.c
View File

@ -5570,6 +5570,8 @@ int lv_resize(struct logical_volume *lv,
int activated = 0;
int ret = 0;
int status;
struct device *dev;
char name[PATH_MAX];
if (lv_is_writecache(lv)) {
log_error("Resize not yet allowed on LVs with writecache attached.");
@ -5695,6 +5697,41 @@ int lv_resize(struct logical_volume *lv,
activated = 1;
}
/* Send DISCARD/TRIM to reduced area of VDO volumes
* TODO: enable thin and provide
* TODO2: we need polling method */
if ((lp->resize == LV_REDUCE) && lv_is_vdo(lv)) {
if (dm_snprintf(name, sizeof(name), "%s%s/%s", lv->vg->cmd->dev_dir,
lv->vg->name, lv->name) < 0) {
log_error("Name too long - device not discarded (%s)", lv->name);
return 0;
}
if (!(dev = dev_cache_get(lv->vg->cmd, name, NULL))) {
log_error("%s: not found: device not discarded.", name);
return 0;
}
if (!dev_discard_max_bytes(cmd->dev_types, dev) ||
!dev_discard_granularity(cmd->dev_types, dev)) {
log_error("%s: max bytes and granularity query fails.", name);
dev_destroy_file(dev);
return 0;
}
log_warn("WARNING: %s: Discarding %s at offset " FMTu64 ", please wait...",
name, display_size(cmd, (uint64_t)(lv->le_count - lp->extents) * vg->extent_size),
((uint64_t)lp->extents * vg->extent_size) << SECTOR_SHIFT);
if (!dev_discard_blocks(dev, ((uint64_t)lp->extents * vg->extent_size) << SECTOR_SHIFT,
((uint64_t)(lv->le_count - lp->extents) * vg->extent_size) << SECTOR_SHIFT)) {
log_error("%s: discarding failed.", name);
dev_destroy_file(dev);
return 0;
}
dev_destroy_file(dev);
}
/*
* If the LV is locked from activation, this lock call is a no-op.
* Otherwise, this acquires a transient lock on the lv (not PERSISTENT).