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thin: detect supported features from thinp target

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Add shell variable to override reported min version for testing:
LVM_THIN_VERSION_MIN
This commit is contained in:
Zdenek Kabelac 2012-05-25 13:38:03 +02:00
parent c4db22bd4f
commit 260e8f2476
3 changed files with 46 additions and 1 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.97 -
===============================
Detect features for new 1.1 thin pool target.
Count percentage of completeness upwards when merging a snapshot volume.
Skip activation when using vg/lvchange --sysinit -a ay and lvmetad is active.
Fix extending RAID 4/5/6 logical volumes

9
lib/activate/activate.h
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@ -44,6 +44,15 @@ struct lv_activate_opts {
/* target attribute flags */
#define MIRROR_LOG_CLUSTERED 0x00000001U
/* thin target attribute flags */
enum {
/* bitfields - new features from 1.1 version */
THIN_FEATURE_DISCARD = (1 << 0),
THIN_FEATURE_EXTERNAL_ORIGIN = (1 << 1),
THIN_FEATURE_HELD_ROOT = (1 << 2),
THIN_FEATURE_BLOCK_SIZE = (1 << 3),
};
void set_activation(int activation);
int activation(void);

37
lib/thin/thin.c
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@ -487,16 +487,51 @@ static int _thin_target_percent(void **target_state __attribute__((unused)),
static int _thin_target_present(struct cmd_context *cmd,
const struct lv_segment *seg,
unsigned *attributes __attribute__((unused)))
unsigned *attributes)
{
static int _checked = 0;
static int _present = 0;
static int _attrs = 0;
uint32_t maj, min, patchlevel;
if (!_checked) {
_present = target_present(cmd, THIN_MODULE, 1);
if (!target_version(THIN_MODULE, &maj, &min, &patchlevel)) {
log_error("Cannot read " THIN_MODULE " target version.");
return 0;
}
log_debug("Target " THIN_MODULE " has version %d:%d:%d.",
maj, min, patchlevel);
/* For testing allow to override via shell variable */
if (getenv("LVM_THIN_VERSION_MIN"))
min = atoi(getenv("LVM_THIN_VERSION_MIN"));
if (maj >=1 && min >= 1)
_attrs |= THIN_FEATURE_DISCARD;
else
log_verbose("Target " THIN_MODULE
" without discard support.");
if (maj >=1 && min >= 1)
_attrs |= THIN_FEATURE_EXTERNAL_ORIGIN;
else
log_verbose("Target " THIN_MODULE
" without external origin support.");
#if 0
if (maj >=1 && min >= 1)
_attrs |= THIN_FEATURE_BLOCK_SIZE;
else
log_verbose("Target " THIN_MODULE
" without non power of 2 block size.");
#endif
_checked = 1;
}
if (attributes)
*attributes = _attrs;
return _present;
}
#endif